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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/atm
downloadlinux-2.6.38-lt-ux500-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'net/atm')
-rw-r--r--net/atm/Makefile18
-rw-r--r--net/atm/addr.c134
-rw-r--r--net/atm/addr.h18
-rw-r--r--net/atm/atm_misc.c106
-rw-r--r--net/atm/br2684.c824
-rw-r--r--net/atm/clip.c1045
-rw-r--r--net/atm/common.c804
-rw-r--r--net/atm/common.h50
-rw-r--r--net/atm/ioctl.c139
-rw-r--r--net/atm/ipcommon.c61
-rw-r--r--net/atm/ipcommon.h22
-rw-r--r--net/atm/lec.c2538
-rw-r--r--net/atm/lec.h142
-rw-r--r--net/atm/lec_arpc.h92
-rw-r--r--net/atm/mpc.c1514
-rw-r--r--net/atm/mpc.h53
-rw-r--r--net/atm/mpoa_caches.c576
-rw-r--r--net/atm/mpoa_caches.h96
-rw-r--r--net/atm/mpoa_proc.c305
-rw-r--r--net/atm/pppoatm.c369
-rw-r--r--net/atm/proc.c514
-rw-r--r--net/atm/protocols.h13
-rw-r--r--net/atm/pvc.c155
-rw-r--r--net/atm/raw.c98
-rw-r--r--net/atm/resources.c432
-rw-r--r--net/atm/resources.h46
-rw-r--r--net/atm/signaling.c280
-rw-r--r--net/atm/signaling.h30
-rw-r--r--net/atm/svc.c674
29 files changed, 11148 insertions, 0 deletions
diff --git a/net/atm/Makefile b/net/atm/Makefile
new file mode 100644
index 00000000000..d5818751f6b
--- /dev/null
+++ b/net/atm/Makefile
@@ -0,0 +1,18 @@
+#
+# Makefile for the ATM Protocol Families.
+#
+
+atm-y := addr.o pvc.o signaling.o svc.o ioctl.o common.o atm_misc.o raw.o resources.o
+mpoa-objs := mpc.o mpoa_caches.o mpoa_proc.o
+
+obj-$(CONFIG_ATM) += atm.o
+obj-$(CONFIG_ATM_CLIP) += clip.o
+atm-$(subst m,y,$(CONFIG_ATM_CLIP)) += ipcommon.o
+obj-$(CONFIG_ATM_BR2684) += br2684.o
+atm-$(subst m,y,$(CONFIG_ATM_BR2684)) += ipcommon.o
+atm-$(subst m,y,$(CONFIG_NET_SCH_ATM)) += ipcommon.o
+atm-$(CONFIG_PROC_FS) += proc.o
+
+obj-$(CONFIG_ATM_LANE) += lec.o
+obj-$(CONFIG_ATM_MPOA) += mpoa.o
+obj-$(CONFIG_PPPOATM) += pppoatm.o
diff --git a/net/atm/addr.c b/net/atm/addr.c
new file mode 100644
index 00000000000..1c8867f7f54
--- /dev/null
+++ b/net/atm/addr.c
@@ -0,0 +1,134 @@
+/* net/atm/addr.c - Local ATM address registry */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/sched.h>
+#include <asm/uaccess.h>
+
+#include "signaling.h"
+#include "addr.h"
+
+static int check_addr(struct sockaddr_atmsvc *addr)
+{
+ int i;
+
+ if (addr->sas_family != AF_ATMSVC)
+ return -EAFNOSUPPORT;
+ if (!*addr->sas_addr.pub)
+ return *addr->sas_addr.prv ? 0 : -EINVAL;
+ for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */
+ if (!addr->sas_addr.pub[i])
+ return 0;
+ return -EINVAL;
+}
+
+static int identical(struct sockaddr_atmsvc *a, struct sockaddr_atmsvc *b)
+{
+ if (*a->sas_addr.prv)
+ if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN))
+ return 0;
+ if (!*a->sas_addr.pub)
+ return !*b->sas_addr.pub;
+ if (!*b->sas_addr.pub)
+ return 0;
+ return !strcmp(a->sas_addr.pub, b->sas_addr.pub);
+}
+
+static void notify_sigd(struct atm_dev *dev)
+{
+ struct sockaddr_atmpvc pvc;
+
+ pvc.sap_addr.itf = dev->number;
+ sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL);
+}
+
+void atm_reset_addr(struct atm_dev *dev)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this, *p;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ list_for_each_entry_safe(this, p, &dev->local, entry)
+ kfree(this);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ notify_sigd(dev);
+}
+
+int atm_add_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this;
+ int error;
+
+ error = check_addr(addr);
+ if (error)
+ return error;
+ spin_lock_irqsave(&dev->lock, flags);
+ list_for_each_entry(this, &dev->local, entry) {
+ if (identical(&this->addr, addr)) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -EEXIST;
+ }
+ }
+ this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC);
+ if (!this) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENOMEM;
+ }
+ this->addr = *addr;
+ list_add(&this->entry, &dev->local);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ notify_sigd(dev);
+ return 0;
+}
+
+int atm_del_addr(struct atm_dev *dev, struct sockaddr_atmsvc *addr)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this;
+ int error;
+
+ error = check_addr(addr);
+ if (error)
+ return error;
+ spin_lock_irqsave(&dev->lock, flags);
+ list_for_each_entry(this, &dev->local, entry) {
+ if (identical(&this->addr, addr)) {
+ list_del(&this->entry);
+ spin_unlock_irqrestore(&dev->lock, flags);
+ kfree(this);
+ notify_sigd(dev);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENOENT;
+}
+
+int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf,
+ size_t size)
+{
+ unsigned long flags;
+ struct atm_dev_addr *this;
+ int total = 0, error;
+ struct sockaddr_atmsvc *tmp_buf, *tmp_bufp;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ list_for_each_entry(this, &dev->local, entry)
+ total += sizeof(struct sockaddr_atmsvc);
+ tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC);
+ if (!tmp_buf) {
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return -ENOMEM;
+ }
+ list_for_each_entry(this, &dev->local, entry)
+ memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc));
+ spin_unlock_irqrestore(&dev->lock, flags);
+ error = total > size ? -E2BIG : total;
+ if (copy_to_user(buf, tmp_buf, total < size ? total : size))
+ error = -EFAULT;
+ kfree(tmp_buf);
+ return error;
+}
diff --git a/net/atm/addr.h b/net/atm/addr.h
new file mode 100644
index 00000000000..3099d21feea
--- /dev/null
+++ b/net/atm/addr.h
@@ -0,0 +1,18 @@
+/* net/atm/addr.h - Local ATM address registry */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_ADDR_H
+#define NET_ATM_ADDR_H
+
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+
+
+void atm_reset_addr(struct atm_dev *dev);
+int atm_add_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr);
+int atm_del_addr(struct atm_dev *dev,struct sockaddr_atmsvc *addr);
+int atm_get_addr(struct atm_dev *dev,struct sockaddr_atmsvc __user *buf,size_t size);
+
+#endif
diff --git a/net/atm/atm_misc.c b/net/atm/atm_misc.c
new file mode 100644
index 00000000000..b2113c3454a
--- /dev/null
+++ b/net/atm/atm_misc.c
@@ -0,0 +1,106 @@
+/* net/atm/atm_misc.c - Various functions for use by ATM drivers */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL ICA */
+
+
+#include <linux/module.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/skbuff.h>
+#include <linux/sonet.h>
+#include <linux/bitops.h>
+#include <asm/atomic.h>
+#include <asm/errno.h>
+
+
+int atm_charge(struct atm_vcc *vcc,int truesize)
+{
+ atm_force_charge(vcc,truesize);
+ if (atomic_read(&sk_atm(vcc)->sk_rmem_alloc) <= sk_atm(vcc)->sk_rcvbuf)
+ return 1;
+ atm_return(vcc,truesize);
+ atomic_inc(&vcc->stats->rx_drop);
+ return 0;
+}
+
+
+struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size,
+ int gfp_flags)
+{
+ struct sock *sk = sk_atm(vcc);
+ int guess = atm_guess_pdu2truesize(pdu_size);
+
+ atm_force_charge(vcc,guess);
+ if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) {
+ struct sk_buff *skb = alloc_skb(pdu_size,gfp_flags);
+
+ if (skb) {
+ atomic_add(skb->truesize-guess,
+ &sk->sk_rmem_alloc);
+ return skb;
+ }
+ }
+ atm_return(vcc,guess);
+ atomic_inc(&vcc->stats->rx_drop);
+ return NULL;
+}
+
+
+/*
+ * atm_pcr_goal returns the positive PCR if it should be rounded up, the
+ * negative PCR if it should be rounded down, and zero if the maximum available
+ * bandwidth should be used.
+ *
+ * The rules are as follows (* = maximum, - = absent (0), x = value "x",
+ * (x+ = x or next value above x, x- = x or next value below):
+ *
+ * min max pcr result min max pcr result
+ * - - - * (UBR only) x - - x+
+ * - - * * x - * *
+ * - - z z- x - z z-
+ * - * - * x * - x+
+ * - * * * x * * *
+ * - * z z- x * z z-
+ * - y - y- x y - x+
+ * - y * y- x y * y-
+ * - y z z- x y z z-
+ *
+ * All non-error cases can be converted with the following simple set of rules:
+ *
+ * if pcr == z then z-
+ * else if min == x && pcr == - then x+
+ * else if max == y then y-
+ * else *
+ */
+
+
+int atm_pcr_goal(struct atm_trafprm *tp)
+{
+ if (tp->pcr && tp->pcr != ATM_MAX_PCR) return -tp->pcr;
+ if (tp->min_pcr && !tp->pcr) return tp->min_pcr;
+ if (tp->max_pcr != ATM_MAX_PCR) return -tp->max_pcr;
+ return 0;
+}
+
+
+void sonet_copy_stats(struct k_sonet_stats *from,struct sonet_stats *to)
+{
+#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
+ __SONET_ITEMS
+#undef __HANDLE_ITEM
+}
+
+
+void sonet_subtract_stats(struct k_sonet_stats *from,struct sonet_stats *to)
+{
+#define __HANDLE_ITEM(i) atomic_sub(to->i,&from->i)
+ __SONET_ITEMS
+#undef __HANDLE_ITEM
+}
+
+
+EXPORT_SYMBOL(atm_charge);
+EXPORT_SYMBOL(atm_alloc_charge);
+EXPORT_SYMBOL(atm_pcr_goal);
+EXPORT_SYMBOL(sonet_copy_stats);
+EXPORT_SYMBOL(sonet_subtract_stats);
diff --git a/net/atm/br2684.c b/net/atm/br2684.c
new file mode 100644
index 00000000000..e6954cf1459
--- /dev/null
+++ b/net/atm/br2684.c
@@ -0,0 +1,824 @@
+/*
+Experimental ethernet netdevice using ATM AAL5 as underlying carrier
+(RFC1483 obsoleted by RFC2684) for Linux 2.4
+Author: Marcell GAL, 2000, XDSL Ltd, Hungary
+*/
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/ip.h>
+#include <asm/uaccess.h>
+#include <net/arp.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/seq_file.h>
+
+#include <linux/atmbr2684.h>
+
+#include "common.h"
+#include "ipcommon.h"
+
+/*
+ * Define this to use a version of the code which interacts with the higher
+ * layers in a more intellegent way, by always reserving enough space for
+ * our header at the begining of the packet. However, there may still be
+ * some problems with programs like tcpdump. In 2.5 we'll sort out what
+ * we need to do to get this perfect. For now we just will copy the packet
+ * if we need space for the header
+ */
+/* #define FASTER_VERSION */
+
+#ifdef DEBUG
+#define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args)
+#else
+#define DPRINTK(format, args...)
+#endif
+
+#ifdef SKB_DEBUG
+static void skb_debug(const struct sk_buff *skb)
+{
+#define NUM2PRINT 50
+ char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */
+ int i = 0;
+ for (i = 0; i < skb->len && i < NUM2PRINT; i++) {
+ sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
+ }
+ printk(KERN_DEBUG "br2684: skb: %s\n", buf);
+}
+#else
+#define skb_debug(skb) do {} while (0)
+#endif
+
+static unsigned char llc_oui_pid_pad[] =
+ { 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
+#define PADLEN (2)
+
+enum br2684_encaps {
+ e_vc = BR2684_ENCAPS_VC,
+ e_llc = BR2684_ENCAPS_LLC,
+};
+
+struct br2684_vcc {
+ struct atm_vcc *atmvcc;
+ struct net_device *device;
+ /* keep old push,pop functions for chaining */
+ void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
+ /* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */
+ enum br2684_encaps encaps;
+ struct list_head brvccs;
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ struct br2684_filter filter;
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+#ifndef FASTER_VERSION
+ unsigned copies_needed, copies_failed;
+#endif /* FASTER_VERSION */
+};
+
+struct br2684_dev {
+ struct net_device *net_dev;
+ struct list_head br2684_devs;
+ int number;
+ struct list_head brvccs; /* one device <=> one vcc (before xmas) */
+ struct net_device_stats stats;
+ int mac_was_set;
+};
+
+/*
+ * This lock should be held for writing any time the list of devices or
+ * their attached vcc's could be altered. It should be held for reading
+ * any time these are being queried. Note that we sometimes need to
+ * do read-locking under interrupt context, so write locking must block
+ * the current CPU's interrupts
+ */
+static DEFINE_RWLOCK(devs_lock);
+
+static LIST_HEAD(br2684_devs);
+
+static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
+{
+ return (struct br2684_dev *) net_dev->priv;
+}
+
+static inline struct net_device *list_entry_brdev(const struct list_head *le)
+{
+ return list_entry(le, struct br2684_dev, br2684_devs)->net_dev;
+}
+
+static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
+{
+ return (struct br2684_vcc *) (atmvcc->user_back);
+}
+
+static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
+{
+ return list_entry(le, struct br2684_vcc, brvccs);
+}
+
+/* Caller should hold read_lock(&devs_lock) */
+static struct net_device *br2684_find_dev(const struct br2684_if_spec *s)
+{
+ struct list_head *lh;
+ struct net_device *net_dev;
+ switch (s->method) {
+ case BR2684_FIND_BYNUM:
+ list_for_each(lh, &br2684_devs) {
+ net_dev = list_entry_brdev(lh);
+ if (BRPRIV(net_dev)->number == s->spec.devnum)
+ return net_dev;
+ }
+ break;
+ case BR2684_FIND_BYIFNAME:
+ list_for_each(lh, &br2684_devs) {
+ net_dev = list_entry_brdev(lh);
+ if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ))
+ return net_dev;
+ }
+ break;
+ }
+ return NULL;
+}
+
+/*
+ * Send a packet out a particular vcc. Not to useful right now, but paves
+ * the way for multiple vcc's per itf. Returns true if we can send,
+ * otherwise false
+ */
+static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev,
+ struct br2684_vcc *brvcc)
+{
+ struct atm_vcc *atmvcc;
+#ifdef FASTER_VERSION
+ if (brvcc->encaps == e_llc)
+ memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8);
+ /* last 2 bytes of llc_oui_pid_pad are managed by header routines;
+ yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad)
+ */
+#else
+ int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
+ if (skb_headroom(skb) < minheadroom) {
+ struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
+ brvcc->copies_needed++;
+ dev_kfree_skb(skb);
+ if (skb2 == NULL) {
+ brvcc->copies_failed++;
+ return 0;
+ }
+ skb = skb2;
+ }
+ skb_push(skb, minheadroom);
+ if (brvcc->encaps == e_llc)
+ memcpy(skb->data, llc_oui_pid_pad, 10);
+ else
+ memset(skb->data, 0, 2);
+#endif /* FASTER_VERSION */
+ skb_debug(skb);
+
+ ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
+ DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
+ if (!atm_may_send(atmvcc, skb->truesize)) {
+ /* we free this here for now, because we cannot know in a higher
+ layer whether the skb point it supplied wasn't freed yet.
+ now, it always is.
+ */
+ dev_kfree_skb(skb);
+ return 0;
+ }
+ atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
+ ATM_SKB(skb)->atm_options = atmvcc->atm_options;
+ brdev->stats.tx_packets++;
+ brdev->stats.tx_bytes += skb->len;
+ atmvcc->send(atmvcc, skb);
+ return 1;
+}
+
+static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb,
+ struct br2684_dev *brdev)
+{
+ return list_empty(&brdev->brvccs) ? NULL :
+ list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
+}
+
+static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct br2684_dev *brdev = BRPRIV(dev);
+ struct br2684_vcc *brvcc;
+
+ DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst);
+ read_lock(&devs_lock);
+ brvcc = pick_outgoing_vcc(skb, brdev);
+ if (brvcc == NULL) {
+ DPRINTK("no vcc attached to dev %s\n", dev->name);
+ brdev->stats.tx_errors++;
+ brdev->stats.tx_carrier_errors++;
+ /* netif_stop_queue(dev); */
+ dev_kfree_skb(skb);
+ read_unlock(&devs_lock);
+ return -EUNATCH;
+ }
+ if (!br2684_xmit_vcc(skb, brdev, brvcc)) {
+ /*
+ * We should probably use netif_*_queue() here, but that
+ * involves added complication. We need to walk before
+ * we can run
+ */
+ /* don't free here! this pointer might be no longer valid!
+ dev_kfree_skb(skb);
+ */
+ brdev->stats.tx_errors++;
+ brdev->stats.tx_fifo_errors++;
+ }
+ read_unlock(&devs_lock);
+ return 0;
+}
+
+static struct net_device_stats *br2684_get_stats(struct net_device *dev)
+{
+ DPRINTK("br2684_get_stats\n");
+ return &BRPRIV(dev)->stats;
+}
+
+#ifdef FASTER_VERSION
+/*
+ * These mirror eth_header and eth_header_cache. They are not usually
+ * exported for use in modules, so we grab them from net_device
+ * after ether_setup() is done with it. Bit of a hack.
+ */
+static int (*my_eth_header)(struct sk_buff *, struct net_device *,
+ unsigned short, void *, void *, unsigned);
+static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *);
+
+static int
+br2684_header(struct sk_buff *skb, struct net_device *dev,
+ unsigned short type, void *daddr, void *saddr, unsigned len)
+{
+ u16 *pad_before_eth;
+ int t = my_eth_header(skb, dev, type, daddr, saddr, len);
+ if (t > 0) {
+ pad_before_eth = (u16 *) skb_push(skb, 2);
+ *pad_before_eth = 0;
+ return dev->hard_header_len; /* or return 16; ? */
+ } else
+ return t;
+}
+
+static int
+br2684_header_cache(struct neighbour *neigh, struct hh_cache *hh)
+{
+/* hh_data is 16 bytes long. if encaps is ether-llc we need 24, so
+xmit will add the additional header part in that case */
+ u16 *pad_before_eth = (u16 *)(hh->hh_data);
+ int t = my_eth_header_cache(neigh, hh);
+ DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh);
+ if (t < 0)
+ return t;
+ else {
+ *pad_before_eth = 0;
+ hh->hh_len = PADLEN + ETH_HLEN;
+ }
+ return 0;
+}
+
+/*
+ * This is similar to eth_type_trans, which cannot be used because of
+ * our dev->hard_header_len
+ */
+static inline unsigned short br_type_trans(struct sk_buff *skb,
+ struct net_device *dev)
+{
+ struct ethhdr *eth;
+ unsigned char *rawp;
+ eth = eth_hdr(skb);
+
+ if (*eth->h_dest & 1) {
+ if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
+ skb->pkt_type = PACKET_BROADCAST;
+ else
+ skb->pkt_type = PACKET_MULTICAST;
+ }
+
+ else if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
+ skb->pkt_type = PACKET_OTHERHOST;
+
+ if (ntohs(eth->h_proto) >= 1536)
+ return eth->h_proto;
+
+ rawp = skb->data;
+
+ /*
+ * This is a magic hack to spot IPX packets. Older Novell breaks
+ * the protocol design and runs IPX over 802.3 without an 802.2 LLC
+ * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
+ * won't work for fault tolerant netware but does for the rest.
+ */
+ if (*(unsigned short *) rawp == 0xFFFF)
+ return htons(ETH_P_802_3);
+
+ /*
+ * Real 802.2 LLC
+ */
+ return htons(ETH_P_802_2);
+}
+#endif /* FASTER_VERSION */
+
+/*
+ * We remember when the MAC gets set, so we don't override it later with
+ * the ESI of the ATM card of the first VC
+ */
+static int (*my_eth_mac_addr)(struct net_device *, void *);
+static int br2684_mac_addr(struct net_device *dev, void *p)
+{
+ int err = my_eth_mac_addr(dev, p);
+ if (!err)
+ BRPRIV(dev)->mac_was_set = 1;
+ return err;
+}
+
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+/* this IOCTL is experimental. */
+static int br2684_setfilt(struct atm_vcc *atmvcc, void __user *arg)
+{
+ struct br2684_vcc *brvcc;
+ struct br2684_filter_set fs;
+
+ if (copy_from_user(&fs, arg, sizeof fs))
+ return -EFAULT;
+ if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
+ /*
+ * This is really a per-vcc thing, but we can also search
+ * by device
+ */
+ struct br2684_dev *brdev;
+ read_lock(&devs_lock);
+ brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
+ if (brdev == NULL || list_empty(&brdev->brvccs) ||
+ brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
+ brvcc = NULL;
+ else
+ brvcc = list_entry_brvcc(brdev->brvccs.next);
+ read_unlock(&devs_lock);
+ if (brvcc == NULL)
+ return -ESRCH;
+ } else
+ brvcc = BR2684_VCC(atmvcc);
+ memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
+ return 0;
+}
+
+/* Returns 1 if packet should be dropped */
+static inline int
+packet_fails_filter(u16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
+{
+ if (brvcc->filter.netmask == 0)
+ return 0; /* no filter in place */
+ if (type == __constant_htons(ETH_P_IP) &&
+ (((struct iphdr *) (skb->data))->daddr & brvcc->filter.
+ netmask) == brvcc->filter.prefix)
+ return 0;
+ if (type == __constant_htons(ETH_P_ARP))
+ return 0;
+ /* TODO: we should probably filter ARPs too.. don't want to have
+ * them returning values that don't make sense, or is that ok?
+ */
+ return 1; /* drop */
+}
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+
+static void br2684_close_vcc(struct br2684_vcc *brvcc)
+{
+ DPRINTK("removing VCC %p from dev %p\n", brvcc, brvcc->device);
+ write_lock_irq(&devs_lock);
+ list_del(&brvcc->brvccs);
+ write_unlock_irq(&devs_lock);
+ brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
+ brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
+ kfree(brvcc);
+ module_put(THIS_MODULE);
+}
+
+/* when AAL5 PDU comes in: */
+static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
+{
+ struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
+ struct net_device *net_dev = brvcc->device;
+ struct br2684_dev *brdev = BRPRIV(net_dev);
+ int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN;
+
+ DPRINTK("br2684_push\n");
+
+ if (unlikely(skb == NULL)) {
+ /* skb==NULL means VCC is being destroyed */
+ br2684_close_vcc(brvcc);
+ if (list_empty(&brdev->brvccs)) {
+ read_lock(&devs_lock);
+ list_del(&brdev->br2684_devs);
+ read_unlock(&devs_lock);
+ unregister_netdev(net_dev);
+ free_netdev(net_dev);
+ }
+ return;
+ }
+
+ skb_debug(skb);
+ atm_return(atmvcc, skb->truesize);
+ DPRINTK("skb from brdev %p\n", brdev);
+ if (brvcc->encaps == e_llc) {
+ /* let us waste some time for checking the encapsulation.
+ Note, that only 7 char is checked so frames with a valid FCS
+ are also accepted (but FCS is not checked of course) */
+ if (memcmp(skb->data, llc_oui_pid_pad, 7)) {
+ brdev->stats.rx_errors++;
+ dev_kfree_skb(skb);
+ return;
+ }
+
+ /* Strip FCS if present */
+ if (skb->len > 7 && skb->data[7] == 0x01)
+ __skb_trim(skb, skb->len - 4);
+ } else {
+ plen = PADLEN + ETH_HLEN; /* pad, dstmac,srcmac, ethtype */
+ /* first 2 chars should be 0 */
+ if (*((u16 *) (skb->data)) != 0) {
+ brdev->stats.rx_errors++;
+ dev_kfree_skb(skb);
+ return;
+ }
+ }
+ if (skb->len < plen) {
+ brdev->stats.rx_errors++;
+ dev_kfree_skb(skb); /* dev_ not needed? */
+ return;
+ }
+
+#ifdef FASTER_VERSION
+ /* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier,
+ than should be. What else should I set? */
+ skb_pull(skb, plen);
+ skb->mac.raw = ((char *) (skb->data)) - ETH_HLEN;
+ skb->pkt_type = PACKET_HOST;
+#ifdef CONFIG_BR2684_FAST_TRANS
+ skb->protocol = ((u16 *) skb->data)[-1];
+#else /* some protocols might require this: */
+ skb->protocol = br_type_trans(skb, net_dev);
+#endif /* CONFIG_BR2684_FAST_TRANS */
+#else
+ skb_pull(skb, plen - ETH_HLEN);
+ skb->protocol = eth_type_trans(skb, net_dev);
+#endif /* FASTER_VERSION */
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) {
+ brdev->stats.rx_dropped++;
+ dev_kfree_skb(skb);
+ return;
+ }
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ skb->dev = net_dev;
+ ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
+ DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol));
+ skb_debug(skb);
+ if (unlikely(!(net_dev->flags & IFF_UP))) {
+ /* sigh, interface is down */
+ brdev->stats.rx_dropped++;
+ dev_kfree_skb(skb);
+ return;
+ }
+ brdev->stats.rx_packets++;
+ brdev->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+}
+
+static int br2684_regvcc(struct atm_vcc *atmvcc, void __user *arg)
+{
+/* assign a vcc to a dev
+Note: we do not have explicit unassign, but look at _push()
+*/
+ int err;
+ struct br2684_vcc *brvcc;
+ struct sk_buff_head copy;
+ struct sk_buff *skb;
+ struct br2684_dev *brdev;
+ struct net_device *net_dev;
+ struct atm_backend_br2684 be;
+
+ if (copy_from_user(&be, arg, sizeof be))
+ return -EFAULT;
+ brvcc = kmalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
+ if (!brvcc)
+ return -ENOMEM;
+ memset(brvcc, 0, sizeof(struct br2684_vcc));
+ write_lock_irq(&devs_lock);
+ net_dev = br2684_find_dev(&be.ifspec);
+ if (net_dev == NULL) {
+ printk(KERN_ERR
+ "br2684: tried to attach to non-existant device\n");
+ err = -ENXIO;
+ goto error;
+ }
+ brdev = BRPRIV(net_dev);
+ if (atmvcc->push == NULL) {
+ err = -EBADFD;
+ goto error;
+ }
+ if (!list_empty(&brdev->brvccs)) {
+ /* Only 1 VCC/dev right now */
+ err = -EEXIST;
+ goto error;
+ }
+ if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO ||
+ be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps !=
+ BR2684_ENCAPS_VC && be.encaps != BR2684_ENCAPS_LLC) ||
+ be.min_size != 0) {
+ err = -EINVAL;
+ goto error;
+ }
+ DPRINTK("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps,
+ brvcc);
+ if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
+ unsigned char *esi = atmvcc->dev->esi;
+ if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
+ memcpy(net_dev->dev_addr, esi, net_dev->addr_len);
+ else
+ net_dev->dev_addr[2] = 1;
+ }
+ list_add(&brvcc->brvccs, &brdev->brvccs);
+ write_unlock_irq(&devs_lock);
+ brvcc->device = net_dev;
+ brvcc->atmvcc = atmvcc;
+ atmvcc->user_back = brvcc;
+ brvcc->encaps = (enum br2684_encaps) be.encaps;
+ brvcc->old_push = atmvcc->push;
+ barrier();
+ atmvcc->push = br2684_push;
+ skb_queue_head_init(&copy);
+ skb_migrate(&sk_atm(atmvcc)->sk_receive_queue, &copy);
+ while ((skb = skb_dequeue(&copy)) != NULL) {
+ BRPRIV(skb->dev)->stats.rx_bytes -= skb->len;
+ BRPRIV(skb->dev)->stats.rx_packets--;
+ br2684_push(atmvcc, skb);
+ }
+ __module_get(THIS_MODULE);
+ return 0;
+ error:
+ write_unlock_irq(&devs_lock);
+ kfree(brvcc);
+ return err;
+}
+
+static void br2684_setup(struct net_device *netdev)
+{
+ struct br2684_dev *brdev = BRPRIV(netdev);
+
+ ether_setup(netdev);
+ brdev->net_dev = netdev;
+
+#ifdef FASTER_VERSION
+ my_eth_header = netdev->hard_header;
+ netdev->hard_header = br2684_header;
+ my_eth_header_cache = netdev->hard_header_cache;
+ netdev->hard_header_cache = br2684_header_cache;
+ netdev->hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */
+#endif
+ my_eth_mac_addr = netdev->set_mac_address;
+ netdev->set_mac_address = br2684_mac_addr;
+ netdev->hard_start_xmit = br2684_start_xmit;
+ netdev->get_stats = br2684_get_stats;
+
+ INIT_LIST_HEAD(&brdev->brvccs);
+}
+
+static int br2684_create(void __user *arg)
+{
+ int err;
+ struct net_device *netdev;
+ struct br2684_dev *brdev;
+ struct atm_newif_br2684 ni;
+
+ DPRINTK("br2684_create\n");
+
+ if (copy_from_user(&ni, arg, sizeof ni)) {
+ return -EFAULT;
+ }
+ if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) {
+ return -EINVAL;
+ }
+
+ netdev = alloc_netdev(sizeof(struct br2684_dev),
+ ni.ifname[0] ? ni.ifname : "nas%d",
+ br2684_setup);
+ if (!netdev)
+ return -ENOMEM;
+
+ brdev = BRPRIV(netdev);
+
+ DPRINTK("registered netdev %s\n", netdev->name);
+ /* open, stop, do_ioctl ? */
+ err = register_netdev(netdev);
+ if (err < 0) {
+ printk(KERN_ERR "br2684_create: register_netdev failed\n");
+ free_netdev(netdev);
+ return err;
+ }
+
+ write_lock_irq(&devs_lock);
+ brdev->number = list_empty(&br2684_devs) ? 1 :
+ BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
+ list_add_tail(&brdev->br2684_devs, &br2684_devs);
+ write_unlock_irq(&devs_lock);
+ return 0;
+}
+
+/*
+ * This handles ioctls actually performed on our vcc - we must return
+ * -ENOIOCTLCMD for any unrecognized ioctl
+ */
+static int br2684_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ struct atm_vcc *atmvcc = ATM_SD(sock);
+ void __user *argp = (void __user *)arg;
+
+ int err;
+ switch(cmd) {
+ case ATM_SETBACKEND:
+ case ATM_NEWBACKENDIF: {
+ atm_backend_t b;
+ err = get_user(b, (atm_backend_t __user *) argp);
+ if (err)
+ return -EFAULT;
+ if (b != ATM_BACKEND_BR2684)
+ return -ENOIOCTLCMD;
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ if (cmd == ATM_SETBACKEND)
+ return br2684_regvcc(atmvcc, argp);
+ else
+ return br2684_create(argp);
+ }
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+ case BR2684_SETFILT:
+ if (atmvcc->push != br2684_push)
+ return -ENOIOCTLCMD;
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ err = br2684_setfilt(atmvcc, argp);
+ return err;
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ }
+ return -ENOIOCTLCMD;
+}
+
+static struct atm_ioctl br2684_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = br2684_ioctl,
+};
+
+
+#ifdef CONFIG_PROC_FS
+static void *br2684_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ loff_t offs = 0;
+ struct br2684_dev *brd;
+
+ read_lock(&devs_lock);
+
+ list_for_each_entry(brd, &br2684_devs, br2684_devs) {
+ if (offs == *pos)
+ return brd;
+ ++offs;
+ }
+ return NULL;
+}
+
+static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct br2684_dev *brd = v;
+
+ ++*pos;
+
+ brd = list_entry(brd->br2684_devs.next,
+ struct br2684_dev, br2684_devs);
+ return (&brd->br2684_devs != &br2684_devs) ? brd : NULL;
+}
+
+static void br2684_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&devs_lock);
+}
+
+static int br2684_seq_show(struct seq_file *seq, void *v)
+{
+ const struct br2684_dev *brdev = v;
+ const struct net_device *net_dev = brdev->net_dev;
+ const struct br2684_vcc *brvcc;
+
+ seq_printf(seq, "dev %.16s: num=%d, mac=%02X:%02X:"
+ "%02X:%02X:%02X:%02X (%s)\n", net_dev->name,
+ brdev->number,
+ net_dev->dev_addr[0],
+ net_dev->dev_addr[1],
+ net_dev->dev_addr[2],
+ net_dev->dev_addr[3],
+ net_dev->dev_addr[4],
+ net_dev->dev_addr[5],
+ brdev->mac_was_set ? "set" : "auto");
+
+ list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
+ seq_printf(seq, " vcc %d.%d.%d: encaps=%s"
+#ifndef FASTER_VERSION
+ ", failed copies %u/%u"
+#endif /* FASTER_VERSION */
+ "\n", brvcc->atmvcc->dev->number,
+ brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
+ (brvcc->encaps == e_llc) ? "LLC" : "VC"
+#ifndef FASTER_VERSION
+ , brvcc->copies_failed
+ , brvcc->copies_needed
+#endif /* FASTER_VERSION */
+ );
+#ifdef CONFIG_ATM_BR2684_IPFILTER
+#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
+#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
+ if (brvcc->filter.netmask != 0)
+ seq_printf(seq, " filter=%d.%d.%d.%d/"
+ "%d.%d.%d.%d\n",
+ bs(prefix), bs(netmask));
+#undef bs
+#undef b1
+#endif /* CONFIG_ATM_BR2684_IPFILTER */
+ }
+ return 0;
+}
+
+static struct seq_operations br2684_seq_ops = {
+ .start = br2684_seq_start,
+ .next = br2684_seq_next,
+ .stop = br2684_seq_stop,
+ .show = br2684_seq_show,
+};
+
+static int br2684_proc_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &br2684_seq_ops);
+}
+
+static struct file_operations br2684_proc_ops = {
+ .owner = THIS_MODULE,
+ .open = br2684_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
+#endif
+
+static int __init br2684_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *p;
+ if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL)
+ return -ENOMEM;
+ p->proc_fops = &br2684_proc_ops;
+#endif
+ register_atm_ioctl(&br2684_ioctl_ops);
+ return 0;
+}
+
+static void __exit br2684_exit(void)
+{
+ struct net_device *net_dev;
+ struct br2684_dev *brdev;
+ struct br2684_vcc *brvcc;
+ deregister_atm_ioctl(&br2684_ioctl_ops);
+
+#ifdef CONFIG_PROC_FS
+ remove_proc_entry("br2684", atm_proc_root);
+#endif
+
+ while (!list_empty(&br2684_devs)) {
+ net_dev = list_entry_brdev(br2684_devs.next);
+ brdev = BRPRIV(net_dev);
+ while (!list_empty(&brdev->brvccs)) {
+ brvcc = list_entry_brvcc(brdev->brvccs.next);
+ br2684_close_vcc(brvcc);
+ }
+
+ list_del(&brdev->br2684_devs);
+ unregister_netdev(net_dev);
+ free_netdev(net_dev);
+ }
+}
+
+module_init(br2684_init);
+module_exit(br2684_exit);
+
+MODULE_AUTHOR("Marcell GAL");
+MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
+MODULE_LICENSE("GPL");
diff --git a/net/atm/clip.c b/net/atm/clip.c
new file mode 100644
index 00000000000..28dab55a438
--- /dev/null
+++ b/net/atm/clip.c
@@ -0,0 +1,1045 @@
+/* net/atm/clip.c - RFC1577 Classical IP over ATM */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/config.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/kernel.h> /* for UINT_MAX */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/timer.h>
+#include <linux/if_arp.h> /* for some manifest constants */
+#include <linux/notifier.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmclip.h>
+#include <linux/atmarp.h>
+#include <linux/ip.h> /* for net/route.h */
+#include <linux/in.h> /* for struct sockaddr_in */
+#include <linux/if.h> /* for IFF_UP */
+#include <linux/inetdevice.h>
+#include <linux/bitops.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/rcupdate.h>
+#include <linux/jhash.h>
+#include <net/route.h> /* for struct rtable and routing */
+#include <net/icmp.h> /* icmp_send */
+#include <asm/param.h> /* for HZ */
+#include <asm/byteorder.h> /* for htons etc. */
+#include <asm/system.h> /* save/restore_flags */
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+
+#include "common.h"
+#include "resources.h"
+#include "ipcommon.h"
+#include <net/atmclip.h>
+
+
+#if 0
+#define DPRINTK(format,args...) printk(format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+static struct net_device *clip_devs;
+static struct atm_vcc *atmarpd;
+static struct neigh_table clip_tbl;
+static struct timer_list idle_timer;
+static int start_timer = 1;
+
+
+static int to_atmarpd(enum atmarp_ctrl_type type,int itf,unsigned long ip)
+{
+ struct sock *sk;
+ struct atmarp_ctrl *ctrl;
+ struct sk_buff *skb;
+
+ DPRINTK("to_atmarpd(%d)\n",type);
+ if (!atmarpd) return -EUNATCH;
+ skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC);
+ if (!skb) return -ENOMEM;
+ ctrl = (struct atmarp_ctrl *) skb_put(skb,sizeof(struct atmarp_ctrl));
+ ctrl->type = type;
+ ctrl->itf_num = itf;
+ ctrl->ip = ip;
+ atm_force_charge(atmarpd,skb->truesize);
+
+ sk = sk_atm(atmarpd);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+ return 0;
+}
+
+
+static void link_vcc(struct clip_vcc *clip_vcc,struct atmarp_entry *entry)
+{
+ DPRINTK("link_vcc %p to entry %p (neigh %p)\n",clip_vcc,entry,
+ entry->neigh);
+ clip_vcc->entry = entry;
+ clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */
+ clip_vcc->next = entry->vccs;
+ entry->vccs = clip_vcc;
+ entry->neigh->used = jiffies;
+}
+
+
+static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
+{
+ struct atmarp_entry *entry = clip_vcc->entry;
+ struct clip_vcc **walk;
+
+ if (!entry) {
+ printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)\n",clip_vcc);
+ return;
+ }
+ spin_lock_bh(&entry->neigh->dev->xmit_lock); /* block clip_start_xmit() */
+ entry->neigh->used = jiffies;
+ for (walk = &entry->vccs; *walk; walk = &(*walk)->next)
+ if (*walk == clip_vcc) {
+ int error;
+
+ *walk = clip_vcc->next; /* atomic */
+ clip_vcc->entry = NULL;
+ if (clip_vcc->xoff)
+ netif_wake_queue(entry->neigh->dev);
+ if (entry->vccs)
+ goto out;
+ entry->expires = jiffies-1;
+ /* force resolution or expiration */
+ error = neigh_update(entry->neigh, NULL, NUD_NONE,
+ NEIGH_UPDATE_F_ADMIN);
+ if (error)
+ printk(KERN_CRIT "unlink_clip_vcc: "
+ "neigh_update failed with %d\n",error);
+ goto out;
+ }
+ printk(KERN_CRIT "ATMARP: unlink_clip_vcc failed (entry %p, vcc "
+ "0x%p)\n",entry,clip_vcc);
+out:
+ spin_unlock_bh(&entry->neigh->dev->xmit_lock);
+}
+
+/* The neighbour entry n->lock is held. */
+static int neigh_check_cb(struct neighbour *n)
+{
+ struct atmarp_entry *entry = NEIGH2ENTRY(n);
+ struct clip_vcc *cv;
+
+ for (cv = entry->vccs; cv; cv = cv->next) {
+ unsigned long exp = cv->last_use + cv->idle_timeout;
+
+ if (cv->idle_timeout && time_after(jiffies, exp)) {
+ DPRINTK("releasing vcc %p->%p of entry %p\n",
+ cv, cv->vcc, entry);
+ vcc_release_async(cv->vcc, -ETIMEDOUT);
+ }
+ }
+
+ if (entry->vccs || time_before(jiffies, entry->expires))
+ return 0;
+
+ if (atomic_read(&n->refcnt) > 1) {
+ struct sk_buff *skb;
+
+ DPRINTK("destruction postponed with ref %d\n",
+ atomic_read(&n->refcnt));
+
+ while ((skb = skb_dequeue(&n->arp_queue)) != NULL)
+ dev_kfree_skb(skb);
+
+ return 0;
+ }
+
+ DPRINTK("expired neigh %p\n",n);
+ return 1;
+}
+
+static void idle_timer_check(unsigned long dummy)
+{
+ write_lock(&clip_tbl.lock);
+ __neigh_for_each_release(&clip_tbl, neigh_check_cb);
+ mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
+ write_unlock(&clip_tbl.lock);
+}
+
+static int clip_arp_rcv(struct sk_buff *skb)
+{
+ struct atm_vcc *vcc;
+
+ DPRINTK("clip_arp_rcv\n");
+ vcc = ATM_SKB(skb)->vcc;
+ if (!vcc || !atm_charge(vcc,skb->truesize)) {
+ dev_kfree_skb_any(skb);
+ return 0;
+ }
+ DPRINTK("pushing to %p\n",vcc);
+ DPRINTK("using %p\n",CLIP_VCC(vcc)->old_push);
+ CLIP_VCC(vcc)->old_push(vcc,skb);
+ return 0;
+}
+
+static const unsigned char llc_oui[] = {
+ 0xaa, /* DSAP: non-ISO */
+ 0xaa, /* SSAP: non-ISO */
+ 0x03, /* Ctrl: Unnumbered Information Command PDU */
+ 0x00, /* OUI: EtherType */
+ 0x00,
+ 0x00 };
+
+static void clip_push(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+
+ DPRINTK("clip push\n");
+ if (!skb) {
+ DPRINTK("removing VCC %p\n",clip_vcc);
+ if (clip_vcc->entry) unlink_clip_vcc(clip_vcc);
+ clip_vcc->old_push(vcc,NULL); /* pass on the bad news */
+ kfree(clip_vcc);
+ return;
+ }
+ atm_return(vcc,skb->truesize);
+ skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs;
+ /* clip_vcc->entry == NULL if we don't have an IP address yet */
+ if (!skb->dev) {
+ dev_kfree_skb_any(skb);
+ return;
+ }
+ ATM_SKB(skb)->vcc = vcc;
+ skb->mac.raw = skb->data;
+ if (!clip_vcc->encap || skb->len < RFC1483LLC_LEN || memcmp(skb->data,
+ llc_oui,sizeof(llc_oui))) skb->protocol = htons(ETH_P_IP);
+ else {
+ skb->protocol = ((u16 *) skb->data)[3];
+ skb_pull(skb,RFC1483LLC_LEN);
+ if (skb->protocol == htons(ETH_P_ARP)) {
+ PRIV(skb->dev)->stats.rx_packets++;
+ PRIV(skb->dev)->stats.rx_bytes += skb->len;
+ clip_arp_rcv(skb);
+ return;
+ }
+ }
+ clip_vcc->last_use = jiffies;
+ PRIV(skb->dev)->stats.rx_packets++;
+ PRIV(skb->dev)->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+}
+
+
+/*
+ * Note: these spinlocks _must_not_ block on non-SMP. The only goal is that
+ * clip_pop is atomic with respect to the critical section in clip_start_xmit.
+ */
+
+
+static void clip_pop(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+ struct net_device *dev = skb->dev;
+ int old;
+ unsigned long flags;
+
+ DPRINTK("clip_pop(vcc %p)\n",vcc);
+ clip_vcc->old_pop(vcc,skb);
+ /* skb->dev == NULL in outbound ARP packets */
+ if (!dev) return;
+ spin_lock_irqsave(&PRIV(dev)->xoff_lock,flags);
+ if (atm_may_send(vcc,0)) {
+ old = xchg(&clip_vcc->xoff,0);
+ if (old) netif_wake_queue(dev);
+ }
+ spin_unlock_irqrestore(&PRIV(dev)->xoff_lock,flags);
+}
+
+
+static void clip_neigh_destroy(struct neighbour *neigh)
+{
+ DPRINTK("clip_neigh_destroy (neigh %p)\n",neigh);
+ if (NEIGH2ENTRY(neigh)->vccs)
+ printk(KERN_CRIT "clip_neigh_destroy: vccs != NULL !!!\n");
+ NEIGH2ENTRY(neigh)->vccs = (void *) 0xdeadbeef;
+}
+
+
+static void clip_neigh_solicit(struct neighbour *neigh,struct sk_buff *skb)
+{
+ DPRINTK("clip_neigh_solicit (neigh %p, skb %p)\n",neigh,skb);
+ to_atmarpd(act_need,PRIV(neigh->dev)->number,NEIGH2ENTRY(neigh)->ip);
+}
+
+
+static void clip_neigh_error(struct neighbour *neigh,struct sk_buff *skb)
+{
+#ifndef CONFIG_ATM_CLIP_NO_ICMP
+ icmp_send(skb,ICMP_DEST_UNREACH,ICMP_HOST_UNREACH,0);
+#endif
+ kfree_skb(skb);
+}
+
+
+static struct neigh_ops clip_neigh_ops = {
+ .family = AF_INET,
+ .destructor = clip_neigh_destroy,
+ .solicit = clip_neigh_solicit,
+ .error_report = clip_neigh_error,
+ .output = dev_queue_xmit,
+ .connected_output = dev_queue_xmit,
+ .hh_output = dev_queue_xmit,
+ .queue_xmit = dev_queue_xmit,
+};
+
+
+static int clip_constructor(struct neighbour *neigh)
+{
+ struct atmarp_entry *entry = NEIGH2ENTRY(neigh);
+ struct net_device *dev = neigh->dev;
+ struct in_device *in_dev;
+ struct neigh_parms *parms;
+
+ DPRINTK("clip_constructor (neigh %p, entry %p)\n",neigh,entry);
+ neigh->type = inet_addr_type(entry->ip);
+ if (neigh->type != RTN_UNICAST) return -EINVAL;
+
+ rcu_read_lock();
+ in_dev = rcu_dereference(__in_dev_get(dev));
+ if (!in_dev) {
+ rcu_read_unlock();
+ return -EINVAL;
+ }
+
+ parms = in_dev->arp_parms;
+ __neigh_parms_put(neigh->parms);
+ neigh->parms = neigh_parms_clone(parms);
+ rcu_read_unlock();
+
+ neigh->ops = &clip_neigh_ops;
+ neigh->output = neigh->nud_state & NUD_VALID ?
+ neigh->ops->connected_output : neigh->ops->output;
+ entry->neigh = neigh;
+ entry->vccs = NULL;
+ entry->expires = jiffies-1;
+ return 0;
+}
+
+static u32 clip_hash(const void *pkey, const struct net_device *dev)
+{
+ return jhash_2words(*(u32 *)pkey, dev->ifindex, clip_tbl.hash_rnd);
+}
+
+static struct neigh_table clip_tbl = {
+ .family = AF_INET,
+ .entry_size = sizeof(struct neighbour)+sizeof(struct atmarp_entry),
+ .key_len = 4,
+ .hash = clip_hash,
+ .constructor = clip_constructor,
+ .id = "clip_arp_cache",
+
+ /* parameters are copied from ARP ... */
+ .parms = {
+ .tbl = &clip_tbl,
+ .base_reachable_time = 30 * HZ,
+ .retrans_time = 1 * HZ,
+ .gc_staletime = 60 * HZ,
+ .reachable_time = 30 * HZ,
+ .delay_probe_time = 5 * HZ,
+ .queue_len = 3,
+ .ucast_probes = 3,
+ .mcast_probes = 3,
+ .anycast_delay = 1 * HZ,
+ .proxy_delay = (8 * HZ) / 10,
+ .proxy_qlen = 64,
+ .locktime = 1 * HZ,
+ },
+ .gc_interval = 30 * HZ,
+ .gc_thresh1 = 128,
+ .gc_thresh2 = 512,
+ .gc_thresh3 = 1024,
+};
+
+
+/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
+
+/*
+ * We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means
+ * to allocate the neighbour entry but not to ask atmarpd for resolution. Also,
+ * don't increment the usage count. This is used to create entries in
+ * clip_setentry.
+ */
+
+
+static int clip_encap(struct atm_vcc *vcc,int mode)
+{
+ CLIP_VCC(vcc)->encap = mode;
+ return 0;
+}
+
+
+static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
+{
+ struct clip_priv *clip_priv = PRIV(dev);
+ struct atmarp_entry *entry;
+ struct atm_vcc *vcc;
+ int old;
+ unsigned long flags;
+
+ DPRINTK("clip_start_xmit (skb %p)\n",skb);
+ if (!skb->dst) {
+ printk(KERN_ERR "clip_start_xmit: skb->dst == NULL\n");
+ dev_kfree_skb(skb);
+ clip_priv->stats.tx_dropped++;
+ return 0;
+ }
+ if (!skb->dst->neighbour) {
+#if 0
+ skb->dst->neighbour = clip_find_neighbour(skb->dst,1);
+ if (!skb->dst->neighbour) {
+ dev_kfree_skb(skb); /* lost that one */
+ clip_priv->stats.tx_dropped++;
+ return 0;
+ }
+#endif
+ printk(KERN_ERR "clip_start_xmit: NO NEIGHBOUR !\n");
+ dev_kfree_skb(skb);
+ clip_priv->stats.tx_dropped++;
+ return 0;
+ }
+ entry = NEIGH2ENTRY(skb->dst->neighbour);
+ if (!entry->vccs) {
+ if (time_after(jiffies, entry->expires)) {
+ /* should be resolved */
+ entry->expires = jiffies+ATMARP_RETRY_DELAY*HZ;
+ to_atmarpd(act_need,PRIV(dev)->number,entry->ip);
+ }
+ if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS)
+ skb_queue_tail(&entry->neigh->arp_queue,skb);
+ else {
+ dev_kfree_skb(skb);
+ clip_priv->stats.tx_dropped++;
+ }
+ return 0;
+ }
+ DPRINTK("neigh %p, vccs %p\n",entry,entry->vccs);
+ ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
+ DPRINTK("using neighbour %p, vcc %p\n",skb->dst->neighbour,vcc);
+ if (entry->vccs->encap) {
+ void *here;
+
+ here = skb_push(skb,RFC1483LLC_LEN);
+ memcpy(here,llc_oui,sizeof(llc_oui));
+ ((u16 *) here)[3] = skb->protocol;
+ }
+ atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ ATM_SKB(skb)->atm_options = vcc->atm_options;
+ entry->vccs->last_use = jiffies;
+ DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n",skb,vcc,vcc->dev);
+ old = xchg(&entry->vccs->xoff,1); /* assume XOFF ... */
+ if (old) {
+ printk(KERN_WARNING "clip_start_xmit: XOFF->XOFF transition\n");
+ return 0;
+ }
+ clip_priv->stats.tx_packets++;
+ clip_priv->stats.tx_bytes += skb->len;
+ (void) vcc->send(vcc,skb);
+ if (atm_may_send(vcc,0)) {
+ entry->vccs->xoff = 0;
+ return 0;
+ }
+ spin_lock_irqsave(&clip_priv->xoff_lock,flags);
+ netif_stop_queue(dev); /* XOFF -> throttle immediately */
+ barrier();
+ if (!entry->vccs->xoff)
+ netif_start_queue(dev);
+ /* Oh, we just raced with clip_pop. netif_start_queue should be
+ good enough, because nothing should really be asleep because
+ of the brief netif_stop_queue. If this isn't true or if it
+ changes, use netif_wake_queue instead. */
+ spin_unlock_irqrestore(&clip_priv->xoff_lock,flags);
+ return 0;
+}
+
+
+static struct net_device_stats *clip_get_stats(struct net_device *dev)
+{
+ return &PRIV(dev)->stats;
+}
+
+
+static int clip_mkip(struct atm_vcc *vcc,int timeout)
+{
+ struct clip_vcc *clip_vcc;
+ struct sk_buff_head copy;
+ struct sk_buff *skb;
+
+ if (!vcc->push) return -EBADFD;
+ clip_vcc = kmalloc(sizeof(struct clip_vcc),GFP_KERNEL);
+ if (!clip_vcc) return -ENOMEM;
+ DPRINTK("mkip clip_vcc %p vcc %p\n",clip_vcc,vcc);
+ clip_vcc->vcc = vcc;
+ vcc->user_back = clip_vcc;
+ set_bit(ATM_VF_IS_CLIP, &vcc->flags);
+ clip_vcc->entry = NULL;
+ clip_vcc->xoff = 0;
+ clip_vcc->encap = 1;
+ clip_vcc->last_use = jiffies;
+ clip_vcc->idle_timeout = timeout*HZ;
+ clip_vcc->old_push = vcc->push;
+ clip_vcc->old_pop = vcc->pop;
+ vcc->push = clip_push;
+ vcc->pop = clip_pop;
+ skb_queue_head_init(&copy);
+ skb_migrate(&sk_atm(vcc)->sk_receive_queue, &copy);
+ /* re-process everything received between connection setup and MKIP */
+ while ((skb = skb_dequeue(&copy)) != NULL)
+ if (!clip_devs) {
+ atm_return(vcc,skb->truesize);
+ kfree_skb(skb);
+ }
+ else {
+ unsigned int len = skb->len;
+
+ clip_push(vcc,skb);
+ PRIV(skb->dev)->stats.rx_packets--;
+ PRIV(skb->dev)->stats.rx_bytes -= len;
+ }
+ return 0;
+}
+
+
+static int clip_setentry(struct atm_vcc *vcc,u32 ip)
+{
+ struct neighbour *neigh;
+ struct atmarp_entry *entry;
+ int error;
+ struct clip_vcc *clip_vcc;
+ struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip, .tos = 1 } } };
+ struct rtable *rt;
+
+ if (vcc->push != clip_push) {
+ printk(KERN_WARNING "clip_setentry: non-CLIP VCC\n");
+ return -EBADF;
+ }
+ clip_vcc = CLIP_VCC(vcc);
+ if (!ip) {
+ if (!clip_vcc->entry) {
+ printk(KERN_ERR "hiding hidden ATMARP entry\n");
+ return 0;
+ }
+ DPRINTK("setentry: remove\n");
+ unlink_clip_vcc(clip_vcc);
+ return 0;
+ }
+ error = ip_route_output_key(&rt,&fl);
+ if (error) return error;
+ neigh = __neigh_lookup(&clip_tbl,&ip,rt->u.dst.dev,1);
+ ip_rt_put(rt);
+ if (!neigh)
+ return -ENOMEM;
+ entry = NEIGH2ENTRY(neigh);
+ if (entry != clip_vcc->entry) {
+ if (!clip_vcc->entry) DPRINTK("setentry: add\n");
+ else {
+ DPRINTK("setentry: update\n");
+ unlink_clip_vcc(clip_vcc);
+ }
+ link_vcc(clip_vcc,entry);
+ }
+ error = neigh_update(neigh, llc_oui, NUD_PERMANENT,
+ NEIGH_UPDATE_F_OVERRIDE|NEIGH_UPDATE_F_ADMIN);
+ neigh_release(neigh);
+ return error;
+}
+
+
+static void clip_setup(struct net_device *dev)
+{
+ dev->hard_start_xmit = clip_start_xmit;
+ /* sg_xmit ... */
+ dev->get_stats = clip_get_stats;
+ dev->type = ARPHRD_ATM;
+ dev->hard_header_len = RFC1483LLC_LEN;
+ dev->mtu = RFC1626_MTU;
+ dev->tx_queue_len = 100; /* "normal" queue (packets) */
+ /* When using a "real" qdisc, the qdisc determines the queue */
+ /* length. tx_queue_len is only used for the default case, */
+ /* without any more elaborate queuing. 100 is a reasonable */
+ /* compromise between decent burst-tolerance and protection */
+ /* against memory hogs. */
+}
+
+
+static int clip_create(int number)
+{
+ struct net_device *dev;
+ struct clip_priv *clip_priv;
+ int error;
+
+ if (number != -1) {
+ for (dev = clip_devs; dev; dev = PRIV(dev)->next)
+ if (PRIV(dev)->number == number) return -EEXIST;
+ }
+ else {
+ number = 0;
+ for (dev = clip_devs; dev; dev = PRIV(dev)->next)
+ if (PRIV(dev)->number >= number)
+ number = PRIV(dev)->number+1;
+ }
+ dev = alloc_netdev(sizeof(struct clip_priv), "", clip_setup);
+ if (!dev)
+ return -ENOMEM;
+ clip_priv = PRIV(dev);
+ sprintf(dev->name,"atm%d",number);
+ spin_lock_init(&clip_priv->xoff_lock);
+ clip_priv->number = number;
+ error = register_netdev(dev);
+ if (error) {
+ free_netdev(dev);
+ return error;
+ }
+ clip_priv->next = clip_devs;
+ clip_devs = dev;
+ DPRINTK("registered (net:%s)\n",dev->name);
+ return number;
+}
+
+
+static int clip_device_event(struct notifier_block *this,unsigned long event,
+ void *dev)
+{
+ /* ignore non-CLIP devices */
+ if (((struct net_device *) dev)->type != ARPHRD_ATM ||
+ ((struct net_device *) dev)->hard_start_xmit != clip_start_xmit)
+ return NOTIFY_DONE;
+ switch (event) {
+ case NETDEV_UP:
+ DPRINTK("clip_device_event NETDEV_UP\n");
+ (void) to_atmarpd(act_up,PRIV(dev)->number,0);
+ break;
+ case NETDEV_GOING_DOWN:
+ DPRINTK("clip_device_event NETDEV_DOWN\n");
+ (void) to_atmarpd(act_down,PRIV(dev)->number,0);
+ break;
+ case NETDEV_CHANGE:
+ case NETDEV_CHANGEMTU:
+ DPRINTK("clip_device_event NETDEV_CHANGE*\n");
+ (void) to_atmarpd(act_change,PRIV(dev)->number,0);
+ break;
+ case NETDEV_REBOOT:
+ case NETDEV_REGISTER:
+ case NETDEV_DOWN:
+ DPRINTK("clip_device_event %ld\n",event);
+ /* ignore */
+ break;
+ default:
+ printk(KERN_WARNING "clip_device_event: unknown event "
+ "%ld\n",event);
+ break;
+ }
+ return NOTIFY_DONE;
+}
+
+
+static int clip_inet_event(struct notifier_block *this,unsigned long event,
+ void *ifa)
+{
+ struct in_device *in_dev;
+
+ in_dev = ((struct in_ifaddr *) ifa)->ifa_dev;
+ if (!in_dev || !in_dev->dev) {
+ printk(KERN_WARNING "clip_inet_event: no device\n");
+ return NOTIFY_DONE;
+ }
+ /*
+ * Transitions are of the down-change-up type, so it's sufficient to
+ * handle the change on up.
+ */
+ if (event != NETDEV_UP) return NOTIFY_DONE;
+ return clip_device_event(this,NETDEV_CHANGE,in_dev->dev);
+}
+
+
+static struct notifier_block clip_dev_notifier = {
+ clip_device_event,
+ NULL,
+ 0
+};
+
+
+
+static struct notifier_block clip_inet_notifier = {
+ clip_inet_event,
+ NULL,
+ 0
+};
+
+
+
+static void atmarpd_close(struct atm_vcc *vcc)
+{
+ DPRINTK("atmarpd_close\n");
+ atmarpd = NULL; /* assumed to be atomic */
+ barrier();
+ unregister_inetaddr_notifier(&clip_inet_notifier);
+ unregister_netdevice_notifier(&clip_dev_notifier);
+ if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+ printk(KERN_ERR "atmarpd_close: closing with requests "
+ "pending\n");
+ skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+ DPRINTK("(done)\n");
+ module_put(THIS_MODULE);
+}
+
+
+static struct atmdev_ops atmarpd_dev_ops = {
+ .close = atmarpd_close
+};
+
+
+static struct atm_dev atmarpd_dev = {
+ .ops = &atmarpd_dev_ops,
+ .type = "arpd",
+ .number = 999,
+ .lock = SPIN_LOCK_UNLOCKED
+};
+
+
+static int atm_init_atmarp(struct atm_vcc *vcc)
+{
+ if (atmarpd) return -EADDRINUSE;
+ if (start_timer) {
+ start_timer = 0;
+ init_timer(&idle_timer);
+ idle_timer.expires = jiffies+CLIP_CHECK_INTERVAL*HZ;
+ idle_timer.function = idle_timer_check;
+ add_timer(&idle_timer);
+ }
+ atmarpd = vcc;
+ set_bit(ATM_VF_META,&vcc->flags);
+ set_bit(ATM_VF_READY,&vcc->flags);
+ /* allow replies and avoid getting closed if signaling dies */
+ vcc->dev = &atmarpd_dev;
+ vcc_insert_socket(sk_atm(vcc));
+ vcc->push = NULL;
+ vcc->pop = NULL; /* crash */
+ vcc->push_oam = NULL; /* crash */
+ if (register_netdevice_notifier(&clip_dev_notifier))
+ printk(KERN_ERR "register_netdevice_notifier failed\n");
+ if (register_inetaddr_notifier(&clip_inet_notifier))
+ printk(KERN_ERR "register_inetaddr_notifier failed\n");
+ return 0;
+}
+
+static int clip_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int err = 0;
+
+ switch (cmd) {
+ case SIOCMKCLIP:
+ case ATMARPD_CTRL:
+ case ATMARP_MKIP:
+ case ATMARP_SETENTRY:
+ case ATMARP_ENCAP:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ switch (cmd) {
+ case SIOCMKCLIP:
+ err = clip_create(arg);
+ break;
+ case ATMARPD_CTRL:
+ err = atm_init_atmarp(vcc);
+ if (!err) {
+ sock->state = SS_CONNECTED;
+ __module_get(THIS_MODULE);
+ }
+ break;
+ case ATMARP_MKIP:
+ err = clip_mkip(vcc ,arg);
+ break;
+ case ATMARP_SETENTRY:
+ err = clip_setentry(vcc, arg);
+ break;
+ case ATMARP_ENCAP:
+ err = clip_encap(vcc, arg);
+ break;
+ }
+ return err;
+}
+
+static struct atm_ioctl clip_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = clip_ioctl,
+};
+
+#ifdef CONFIG_PROC_FS
+
+static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr)
+{
+ static int code[] = { 1,2,10,6,1,0 };
+ static int e164[] = { 1,8,4,6,1,0 };
+
+ if (*addr->sas_addr.pub) {
+ seq_printf(seq, "%s", addr->sas_addr.pub);
+ if (*addr->sas_addr.prv)
+ seq_putc(seq, '+');
+ } else if (!*addr->sas_addr.prv) {
+ seq_printf(seq, "%s", "(none)");
+ return;
+ }
+ if (*addr->sas_addr.prv) {
+ unsigned char *prv = addr->sas_addr.prv;
+ int *fields;
+ int i, j;
+
+ fields = *prv == ATM_AFI_E164 ? e164 : code;
+ for (i = 0; fields[i]; i++) {
+ for (j = fields[i]; j; j--)
+ seq_printf(seq, "%02X", *prv++);
+ if (fields[i+1])
+ seq_putc(seq, '.');
+ }
+ }
+}
+
+/* This means the neighbour entry has no attached VCC objects. */
+#define SEQ_NO_VCC_TOKEN ((void *) 2)
+
+static void atmarp_info(struct seq_file *seq, struct net_device *dev,
+ struct atmarp_entry *entry, struct clip_vcc *clip_vcc)
+{
+ unsigned long exp;
+ char buf[17];
+ int svc, llc, off;
+
+ svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) ||
+ (sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC));
+
+ llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) ||
+ clip_vcc->encap);
+
+ if (clip_vcc == SEQ_NO_VCC_TOKEN)
+ exp = entry->neigh->used;
+ else
+ exp = clip_vcc->last_use;
+
+ exp = (jiffies - exp) / HZ;
+
+ seq_printf(seq, "%-6s%-4s%-4s%5ld ",
+ dev->name,
+ svc ? "SVC" : "PVC",
+ llc ? "LLC" : "NULL",
+ exp);
+
+ off = scnprintf(buf, sizeof(buf) - 1, "%d.%d.%d.%d",
+ NIPQUAD(entry->ip));
+ while (off < 16)
+ buf[off++] = ' ';
+ buf[off] = '\0';
+ seq_printf(seq, "%s", buf);
+
+ if (clip_vcc == SEQ_NO_VCC_TOKEN) {
+ if (time_before(jiffies, entry->expires))
+ seq_printf(seq, "(resolving)\n");
+ else
+ seq_printf(seq, "(expired, ref %d)\n",
+ atomic_read(&entry->neigh->refcnt));
+ } else if (!svc) {
+ seq_printf(seq, "%d.%d.%d\n",
+ clip_vcc->vcc->dev->number,
+ clip_vcc->vcc->vpi,
+ clip_vcc->vcc->vci);
+ } else {
+ svc_addr(seq, &clip_vcc->vcc->remote);
+ seq_putc(seq, '\n');
+ }
+}
+
+struct clip_seq_state {
+ /* This member must be first. */
+ struct neigh_seq_state ns;
+
+ /* Local to clip specific iteration. */
+ struct clip_vcc *vcc;
+};
+
+static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e,
+ struct clip_vcc *curr)
+{
+ if (!curr) {
+ curr = e->vccs;
+ if (!curr)
+ return SEQ_NO_VCC_TOKEN;
+ return curr;
+ }
+ if (curr == SEQ_NO_VCC_TOKEN)
+ return NULL;
+
+ curr = curr->next;
+
+ return curr;
+}
+
+static void *clip_seq_vcc_walk(struct clip_seq_state *state,
+ struct atmarp_entry *e, loff_t *pos)
+{
+ struct clip_vcc *vcc = state->vcc;
+
+ vcc = clip_seq_next_vcc(e, vcc);
+ if (vcc && pos != NULL) {
+ while (*pos) {
+ vcc = clip_seq_next_vcc(e, vcc);
+ if (!vcc)
+ break;
+ --(*pos);
+ }
+ }
+ state->vcc = vcc;
+
+ return vcc;
+}
+
+static void *clip_seq_sub_iter(struct neigh_seq_state *_state,
+ struct neighbour *n, loff_t *pos)
+{
+ struct clip_seq_state *state = (struct clip_seq_state *) _state;
+
+ return clip_seq_vcc_walk(state, NEIGH2ENTRY(n), pos);
+}
+
+static void *clip_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY);
+}
+
+static int clip_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_arp_banner[] =
+ "IPitf TypeEncp Idle IP address ATM address\n";
+
+ if (v == SEQ_START_TOKEN) {
+ seq_puts(seq, atm_arp_banner);
+ } else {
+ struct clip_seq_state *state = seq->private;
+ struct neighbour *n = v;
+ struct clip_vcc *vcc = state->vcc;
+
+ atmarp_info(seq, n->dev, NEIGH2ENTRY(n), vcc);
+ }
+ return 0;
+}
+
+static struct seq_operations arp_seq_ops = {
+ .start = clip_seq_start,
+ .next = neigh_seq_next,
+ .stop = neigh_seq_stop,
+ .show = clip_seq_show,
+};
+
+static int arp_seq_open(struct inode *inode, struct file *file)
+{
+ struct clip_seq_state *state;
+ struct seq_file *seq;
+ int rc = -EAGAIN;
+
+ state = kmalloc(sizeof(*state), GFP_KERNEL);
+ if (!state) {
+ rc = -ENOMEM;
+ goto out_kfree;
+ }
+ memset(state, 0, sizeof(*state));
+ state->ns.neigh_sub_iter = clip_seq_sub_iter;
+
+ rc = seq_open(file, &arp_seq_ops);
+ if (rc)
+ goto out_kfree;
+
+ seq = file->private_data;
+ seq->private = state;
+out:
+ return rc;
+
+out_kfree:
+ kfree(state);
+ goto out;
+}
+
+static struct file_operations arp_seq_fops = {
+ .open = arp_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+ .owner = THIS_MODULE
+};
+#endif
+
+static int __init atm_clip_init(void)
+{
+ neigh_table_init(&clip_tbl);
+
+ clip_tbl_hook = &clip_tbl;
+ register_atm_ioctl(&clip_ioctl_ops);
+
+#ifdef CONFIG_PROC_FS
+{
+ struct proc_dir_entry *p;
+
+ p = create_proc_entry("arp", S_IRUGO, atm_proc_root);
+ if (p)
+ p->proc_fops = &arp_seq_fops;
+}
+#endif
+
+ return 0;
+}
+
+static void __exit atm_clip_exit(void)
+{
+ struct net_device *dev, *next;
+
+ remove_proc_entry("arp", atm_proc_root);
+
+ deregister_atm_ioctl(&clip_ioctl_ops);
+
+ /* First, stop the idle timer, so it stops banging
+ * on the table.
+ */
+ if (start_timer == 0)
+ del_timer(&idle_timer);
+
+ /* Next, purge the table, so that the device
+ * unregister loop below does not hang due to
+ * device references remaining in the table.
+ */
+ neigh_ifdown(&clip_tbl, NULL);
+
+ dev = clip_devs;
+ while (dev) {
+ next = PRIV(dev)->next;
+ unregister_netdev(dev);
+ free_netdev(dev);
+ dev = next;
+ }
+
+ /* Now it is safe to fully shutdown whole table. */
+ neigh_table_clear(&clip_tbl);
+
+ clip_tbl_hook = NULL;
+}
+
+module_init(atm_clip_init);
+module_exit(atm_clip_exit);
+
+MODULE_LICENSE("GPL");
diff --git a/net/atm/common.c b/net/atm/common.c
new file mode 100644
index 00000000000..6d16be334ea
--- /dev/null
+++ b/net/atm/common.c
@@ -0,0 +1,804 @@
+/* net/atm/common.c - ATM sockets (common part for PVC and SVC) */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h>
+#include <linux/socket.h> /* SOL_SOCKET */
+#include <linux/errno.h> /* error codes */
+#include <linux/capability.h>
+#include <linux/mm.h> /* verify_area */
+#include <linux/sched.h>
+#include <linux/time.h> /* struct timeval */
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+#include <linux/init.h>
+#include <net/sock.h> /* struct sock */
+
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+#include <asm/poll.h>
+
+
+#include "resources.h" /* atm_find_dev */
+#include "common.h" /* prototypes */
+#include "protocols.h" /* atm_init_<transport> */
+#include "addr.h" /* address registry */
+#include "signaling.h" /* for WAITING and sigd_attach */
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+struct hlist_head vcc_hash[VCC_HTABLE_SIZE];
+DEFINE_RWLOCK(vcc_sklist_lock);
+
+static void __vcc_insert_socket(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+ struct hlist_head *head = &vcc_hash[vcc->vci &
+ (VCC_HTABLE_SIZE - 1)];
+ sk->sk_hashent = vcc->vci & (VCC_HTABLE_SIZE - 1);
+ sk_add_node(sk, head);
+}
+
+void vcc_insert_socket(struct sock *sk)
+{
+ write_lock_irq(&vcc_sklist_lock);
+ __vcc_insert_socket(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+}
+
+static void vcc_remove_socket(struct sock *sk)
+{
+ write_lock_irq(&vcc_sklist_lock);
+ sk_del_node_init(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+}
+
+
+static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
+{
+ struct sk_buff *skb;
+ struct sock *sk = sk_atm(vcc);
+
+ if (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) {
+ DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
+ atomic_read(&sk->sk_wmem_alloc), size,
+ sk->sk_sndbuf);
+ return NULL;
+ }
+ while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule();
+ DPRINTK("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc),
+ skb->truesize);
+ atomic_add(skb->truesize, &sk->sk_wmem_alloc);
+ return skb;
+}
+
+
+EXPORT_SYMBOL(vcc_hash);
+EXPORT_SYMBOL(vcc_sklist_lock);
+EXPORT_SYMBOL(vcc_insert_socket);
+
+static void vcc_sock_destruct(struct sock *sk)
+{
+ if (atomic_read(&sk->sk_rmem_alloc))
+ printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc));
+
+ if (atomic_read(&sk->sk_wmem_alloc))
+ printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc));
+}
+
+static void vcc_def_wakeup(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up(sk->sk_sleep);
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static inline int vcc_writable(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+
+ return (vcc->qos.txtp.max_sdu +
+ atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
+}
+
+static void vcc_write_space(struct sock *sk)
+{
+ read_lock(&sk->sk_callback_lock);
+
+ if (vcc_writable(sk)) {
+ if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
+ wake_up_interruptible(sk->sk_sleep);
+
+ sk_wake_async(sk, 2, POLL_OUT);
+ }
+
+ read_unlock(&sk->sk_callback_lock);
+}
+
+static struct proto vcc_proto = {
+ .name = "VCC",
+ .owner = THIS_MODULE,
+ .obj_size = sizeof(struct atm_vcc),
+};
+
+int vcc_create(struct socket *sock, int protocol, int family)
+{
+ struct sock *sk;
+ struct atm_vcc *vcc;
+
+ sock->sk = NULL;
+ if (sock->type == SOCK_STREAM)
+ return -EINVAL;
+ sk = sk_alloc(family, GFP_KERNEL, &vcc_proto, 1);
+ if (!sk)
+ return -ENOMEM;
+ sock_init_data(sock, sk);
+ sk->sk_state_change = vcc_def_wakeup;
+ sk->sk_write_space = vcc_write_space;
+
+ vcc = atm_sk(sk);
+ vcc->dev = NULL;
+ memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc));
+ memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc));
+ vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
+ atomic_set(&sk->sk_wmem_alloc, 0);
+ atomic_set(&sk->sk_rmem_alloc, 0);
+ vcc->push = NULL;
+ vcc->pop = NULL;
+ vcc->push_oam = NULL;
+ vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
+ vcc->atm_options = vcc->aal_options = 0;
+ sk->sk_destruct = vcc_sock_destruct;
+ return 0;
+}
+
+
+static void vcc_destroy_socket(struct sock *sk)
+{
+ struct atm_vcc *vcc = atm_sk(sk);
+ struct sk_buff *skb;
+
+ set_bit(ATM_VF_CLOSE, &vcc->flags);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ if (vcc->dev) {
+ if (vcc->dev->ops->close)
+ vcc->dev->ops->close(vcc);
+ if (vcc->push)
+ vcc->push(vcc, NULL); /* atmarpd has no push */
+
+ vcc_remove_socket(sk); /* no more receive */
+
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ atm_return(vcc,skb->truesize);
+ kfree_skb(skb);
+ }
+
+ module_put(vcc->dev->ops->owner);
+ atm_dev_put(vcc->dev);
+ }
+}
+
+
+int vcc_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+
+ if (sk) {
+ lock_sock(sk);
+ vcc_destroy_socket(sock->sk);
+ release_sock(sk);
+ sock_put(sk);
+ }
+
+ return 0;
+}
+
+
+void vcc_release_async(struct atm_vcc *vcc, int reply)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ set_bit(ATM_VF_CLOSE, &vcc->flags);
+ sk->sk_shutdown |= RCV_SHUTDOWN;
+ sk->sk_err = -reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ sk->sk_state_change(sk);
+}
+
+
+EXPORT_SYMBOL(vcc_release_async);
+
+
+static int adjust_tp(struct atm_trafprm *tp,unsigned char aal)
+{
+ int max_sdu;
+
+ if (!tp->traffic_class) return 0;
+ switch (aal) {
+ case ATM_AAL0:
+ max_sdu = ATM_CELL_SIZE-1;
+ break;
+ case ATM_AAL34:
+ max_sdu = ATM_MAX_AAL34_PDU;
+ break;
+ default:
+ printk(KERN_WARNING "ATM: AAL problems ... "
+ "(%d)\n",aal);
+ /* fall through */
+ case ATM_AAL5:
+ max_sdu = ATM_MAX_AAL5_PDU;
+ }
+ if (!tp->max_sdu) tp->max_sdu = max_sdu;
+ else if (tp->max_sdu > max_sdu) return -EINVAL;
+ if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV;
+ return 0;
+}
+
+
+static int check_ci(struct atm_vcc *vcc, short vpi, int vci)
+{
+ struct hlist_head *head = &vcc_hash[vci &
+ (VCC_HTABLE_SIZE - 1)];
+ struct hlist_node *node;
+ struct sock *s;
+ struct atm_vcc *walk;
+
+ sk_for_each(s, node, head) {
+ walk = atm_sk(s);
+ if (walk->dev != vcc->dev)
+ continue;
+ if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
+ walk->vci == vci && ((walk->qos.txtp.traffic_class !=
+ ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
+ (walk->qos.rxtp.traffic_class != ATM_NONE &&
+ vcc->qos.rxtp.traffic_class != ATM_NONE)))
+ return -EADDRINUSE;
+ }
+
+ /* allow VCCs with same VPI/VCI iff they don't collide on
+ TX/RX (but we may refuse such sharing for other reasons,
+ e.g. if protocol requires to have both channels) */
+
+ return 0;
+}
+
+
+static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci)
+{
+ static short p; /* poor man's per-device cache */
+ static int c;
+ short old_p;
+ int old_c;
+ int err;
+
+ if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
+ err = check_ci(vcc, *vpi, *vci);
+ return err;
+ }
+ /* last scan may have left values out of bounds for current device */
+ if (*vpi != ATM_VPI_ANY)
+ p = *vpi;
+ else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
+ p = 0;
+ if (*vci != ATM_VCI_ANY)
+ c = *vci;
+ else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
+ c = ATM_NOT_RSV_VCI;
+ old_p = p;
+ old_c = c;
+ do {
+ if (!check_ci(vcc, p, c)) {
+ *vpi = p;
+ *vci = c;
+ return 0;
+ }
+ if (*vci == ATM_VCI_ANY) {
+ c++;
+ if (c >= 1 << vcc->dev->ci_range.vci_bits)
+ c = ATM_NOT_RSV_VCI;
+ }
+ if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
+ *vpi == ATM_VPI_ANY) {
+ p++;
+ if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0;
+ }
+ }
+ while (old_p != p || old_c != c);
+ return -EADDRINUSE;
+}
+
+
+static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
+ int vci)
+{
+ struct sock *sk = sk_atm(vcc);
+ int error;
+
+ if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY &&
+ vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC &&
+ vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits))
+ return -EINVAL;
+ if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE))
+ return -EPERM;
+ error = 0;
+ if (!try_module_get(dev->ops->owner))
+ return -ENODEV;
+ vcc->dev = dev;
+ write_lock_irq(&vcc_sklist_lock);
+ if ((error = find_ci(vcc, &vpi, &vci))) {
+ write_unlock_irq(&vcc_sklist_lock);
+ goto fail_module_put;
+ }
+ vcc->vpi = vpi;
+ vcc->vci = vci;
+ __vcc_insert_socket(sk);
+ write_unlock_irq(&vcc_sklist_lock);
+ switch (vcc->qos.aal) {
+ case ATM_AAL0:
+ error = atm_init_aal0(vcc);
+ vcc->stats = &dev->stats.aal0;
+ break;
+ case ATM_AAL34:
+ error = atm_init_aal34(vcc);
+ vcc->stats = &dev->stats.aal34;
+ break;
+ case ATM_NO_AAL:
+ /* ATM_AAL5 is also used in the "0 for default" case */
+ vcc->qos.aal = ATM_AAL5;
+ /* fall through */
+ case ATM_AAL5:
+ error = atm_init_aal5(vcc);
+ vcc->stats = &dev->stats.aal5;
+ break;
+ default:
+ error = -EPROTOTYPE;
+ }
+ if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal);
+ if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal);
+ if (error)
+ goto fail;
+ DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal);
+ DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class,
+ vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu);
+ DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class,
+ vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu);
+
+ if (dev->ops->open) {
+ if ((error = dev->ops->open(vcc)))
+ goto fail;
+ }
+ return 0;
+
+fail:
+ vcc_remove_socket(sk);
+fail_module_put:
+ module_put(dev->ops->owner);
+ /* ensure we get dev module ref count correct */
+ vcc->dev = NULL;
+ return error;
+}
+
+
+int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
+{
+ struct atm_dev *dev;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci);
+ if (sock->state == SS_CONNECTED)
+ return -EISCONN;
+ if (sock->state != SS_UNCONNECTED)
+ return -EINVAL;
+ if (!(vpi || vci))
+ return -EINVAL;
+
+ if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
+ clear_bit(ATM_VF_PARTIAL,&vcc->flags);
+ else
+ if (test_bit(ATM_VF_PARTIAL,&vcc->flags))
+ return -EINVAL;
+ DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; "
+ "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
+ vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr,
+ vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu,
+ vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr,
+ vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
+ vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" :
+ " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
+ return -EBADFD;
+ if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+ vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
+ return -EINVAL;
+ if (itf != ATM_ITF_ANY) {
+ dev = atm_dev_lookup(itf);
+ if (!dev)
+ return -ENODEV;
+ error = __vcc_connect(vcc, dev, vpi, vci);
+ if (error) {
+ atm_dev_put(dev);
+ return error;
+ }
+ } else {
+ struct list_head *p, *next;
+
+ dev = NULL;
+ spin_lock(&atm_dev_lock);
+ list_for_each_safe(p, next, &atm_devs) {
+ dev = list_entry(p, struct atm_dev, dev_list);
+ atm_dev_hold(dev);
+ spin_unlock(&atm_dev_lock);
+ if (!__vcc_connect(vcc, dev, vpi, vci))
+ break;
+ atm_dev_put(dev);
+ dev = NULL;
+ spin_lock(&atm_dev_lock);
+ }
+ spin_unlock(&atm_dev_lock);
+ if (!dev)
+ return -ENODEV;
+ }
+ if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
+ set_bit(ATM_VF_PARTIAL,&vcc->flags);
+ if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
+ sock->state = SS_CONNECTED;
+ return 0;
+}
+
+
+int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
+ size_t size, int flags)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int copied, error = -EINVAL;
+
+ if (sock->state != SS_CONNECTED)
+ return -ENOTCONN;
+ if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */
+ return -EOPNOTSUPP;
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
+ test_bit(ATM_VF_CLOSE,&vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags))
+ return 0;
+
+ skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
+ if (!skb)
+ return error;
+
+ copied = skb->len;
+ if (copied > size) {
+ copied = size;
+ msg->msg_flags |= MSG_TRUNC;
+ }
+
+ error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+ if (error)
+ return error;
+ sock_recv_timestamp(msg, sk, skb);
+ DPRINTK("RcvM %d -= %d\n", atomic_read(&sk->rmem_alloc), skb->truesize);
+ atm_return(vcc, skb->truesize);
+ skb_free_datagram(sk, skb);
+ return copied;
+}
+
+
+int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
+ size_t total_len)
+{
+ struct sock *sk = sock->sk;
+ DEFINE_WAIT(wait);
+ struct atm_vcc *vcc;
+ struct sk_buff *skb;
+ int eff,error;
+ const void __user *buff;
+ int size;
+
+ lock_sock(sk);
+ if (sock->state != SS_CONNECTED) {
+ error = -ENOTCONN;
+ goto out;
+ }
+ if (m->msg_name) {
+ error = -EISCONN;
+ goto out;
+ }
+ if (m->msg_iovlen != 1) {
+ error = -ENOSYS; /* fix this later @@@ */
+ goto out;
+ }
+ buff = m->msg_iov->iov_base;
+ size = m->msg_iov->iov_len;
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags) ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ error = -EPIPE;
+ send_sig(SIGPIPE, current, 0);
+ goto out;
+ }
+ if (!size) {
+ error = 0;
+ goto out;
+ }
+ if (size < 0 || size > vcc->qos.txtp.max_sdu) {
+ error = -EMSGSIZE;
+ goto out;
+ }
+ /* verify_area is done by net/socket.c */
+ eff = (size+3) & ~3; /* align to word boundary */
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ error = 0;
+ while (!(skb = alloc_tx(vcc,eff))) {
+ if (m->msg_flags & MSG_DONTWAIT) {
+ error = -EAGAIN;
+ break;
+ }
+ schedule();
+ if (signal_pending(current)) {
+ error = -ERESTARTSYS;
+ break;
+ }
+ if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
+ test_bit(ATM_VF_CLOSE,&vcc->flags) ||
+ !test_bit(ATM_VF_READY,&vcc->flags)) {
+ error = -EPIPE;
+ send_sig(SIGPIPE, current, 0);
+ break;
+ }
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (error)
+ goto out;
+ skb->dev = NULL; /* for paths shared with net_device interfaces */
+ ATM_SKB(skb)->atm_options = vcc->atm_options;
+ if (copy_from_user(skb_put(skb,size),buff,size)) {
+ kfree_skb(skb);
+ error = -EFAULT;
+ goto out;
+ }
+ if (eff != size) memset(skb->data+size,0,eff-size);
+ error = vcc->dev->ops->send(vcc,skb);
+ error = error ? error : size;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ unsigned int mask;
+
+ poll_wait(file, sk->sk_sleep, wait);
+ mask = 0;
+
+ vcc = ATM_SD(sock);
+
+ /* exceptional events */
+ if (sk->sk_err)
+ mask = POLLERR;
+
+ if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
+ test_bit(ATM_VF_CLOSE, &vcc->flags))
+ mask |= POLLHUP;
+
+ /* readable? */
+ if (!skb_queue_empty(&sk->sk_receive_queue))
+ mask |= POLLIN | POLLRDNORM;
+
+ /* writable? */
+ if (sock->state == SS_CONNECTING &&
+ test_bit(ATM_VF_WAITING, &vcc->flags))
+ return mask;
+
+ if (vcc->qos.txtp.traffic_class != ATM_NONE &&
+ vcc_writable(sk))
+ mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
+
+ return mask;
+}
+
+
+static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
+{
+ int error;
+
+ /*
+ * Don't let the QoS change the already connected AAL type nor the
+ * traffic class.
+ */
+ if (qos->aal != vcc->qos.aal ||
+ qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
+ qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
+ return -EINVAL;
+ error = adjust_tp(&qos->txtp,qos->aal);
+ if (!error) error = adjust_tp(&qos->rxtp,qos->aal);
+ if (error) return error;
+ if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP;
+ if (sk_atm(vcc)->sk_family == AF_ATMPVC)
+ return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET);
+ return svc_change_qos(vcc,qos);
+}
+
+
+static int check_tp(struct atm_trafprm *tp)
+{
+ /* @@@ Should be merged with adjust_tp */
+ if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0;
+ if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
+ !tp->max_pcr) return -EINVAL;
+ if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL;
+ if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
+ tp->min_pcr > tp->max_pcr) return -EINVAL;
+ /*
+ * We allow pcr to be outside [min_pcr,max_pcr], because later
+ * adjustment may still push it in the valid range.
+ */
+ return 0;
+}
+
+
+static int check_qos(struct atm_qos *qos)
+{
+ int error;
+
+ if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
+ return -EINVAL;
+ if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
+ qos->txtp.traffic_class && qos->rxtp.traffic_class &&
+ qos->txtp.traffic_class != ATM_ANYCLASS &&
+ qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL;
+ error = check_tp(&qos->txtp);
+ if (error) return error;
+ return check_tp(&qos->rxtp);
+}
+
+int vcc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct atm_vcc *vcc;
+ unsigned long value;
+ int error;
+
+ if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
+ return -EINVAL;
+
+ vcc = ATM_SD(sock);
+ switch (optname) {
+ case SO_ATMQOS:
+ {
+ struct atm_qos qos;
+
+ if (copy_from_user(&qos,optval,sizeof(qos)))
+ return -EFAULT;
+ error = check_qos(&qos);
+ if (error) return error;
+ if (sock->state == SS_CONNECTED)
+ return atm_change_qos(vcc,&qos);
+ if (sock->state != SS_UNCONNECTED)
+ return -EBADFD;
+ vcc->qos = qos;
+ set_bit(ATM_VF_HASQOS,&vcc->flags);
+ return 0;
+ }
+ case SO_SETCLP:
+ if (get_user(value,(unsigned long __user *)optval))
+ return -EFAULT;
+ if (value) vcc->atm_options |= ATM_ATMOPT_CLP;
+ else vcc->atm_options &= ~ATM_ATMOPT_CLP;
+ return 0;
+ default:
+ if (level == SOL_SOCKET) return -EINVAL;
+ break;
+ }
+ if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL;
+ return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen);
+}
+
+
+int vcc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct atm_vcc *vcc;
+ int len;
+
+ if (get_user(len, optlen))
+ return -EFAULT;
+ if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
+ return -EINVAL;
+
+ vcc = ATM_SD(sock);
+ switch (optname) {
+ case SO_ATMQOS:
+ if (!test_bit(ATM_VF_HASQOS,&vcc->flags))
+ return -EINVAL;
+ return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ?
+ -EFAULT : 0;
+ case SO_SETCLP:
+ return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 :
+ 0,(unsigned long __user *)optval) ? -EFAULT : 0;
+ case SO_ATMPVC:
+ {
+ struct sockaddr_atmpvc pvc;
+
+ if (!vcc->dev ||
+ !test_bit(ATM_VF_ADDR,&vcc->flags))
+ return -ENOTCONN;
+ pvc.sap_family = AF_ATMPVC;
+ pvc.sap_addr.itf = vcc->dev->number;
+ pvc.sap_addr.vpi = vcc->vpi;
+ pvc.sap_addr.vci = vcc->vci;
+ return copy_to_user(optval,&pvc,sizeof(pvc)) ?
+ -EFAULT : 0;
+ }
+ default:
+ if (level == SOL_SOCKET) return -EINVAL;
+ break;
+ }
+ if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL;
+ return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
+}
+
+static int __init atm_init(void)
+{
+ int error;
+
+ if ((error = proto_register(&vcc_proto, 0)) < 0)
+ goto out;
+
+ if ((error = atmpvc_init()) < 0) {
+ printk(KERN_ERR "atmpvc_init() failed with %d\n", error);
+ goto out_unregister_vcc_proto;
+ }
+ if ((error = atmsvc_init()) < 0) {
+ printk(KERN_ERR "atmsvc_init() failed with %d\n", error);
+ goto out_atmpvc_exit;
+ }
+ if ((error = atm_proc_init()) < 0) {
+ printk(KERN_ERR "atm_proc_init() failed with %d\n",error);
+ goto out_atmsvc_exit;
+ }
+out:
+ return error;
+out_atmsvc_exit:
+ atmsvc_exit();
+out_atmpvc_exit:
+ atmsvc_exit();
+out_unregister_vcc_proto:
+ proto_unregister(&vcc_proto);
+ goto out;
+}
+
+static void __exit atm_exit(void)
+{
+ atm_proc_exit();
+ atmsvc_exit();
+ atmpvc_exit();
+ proto_unregister(&vcc_proto);
+}
+
+module_init(atm_init);
+module_exit(atm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NETPROTO(PF_ATMPVC);
+MODULE_ALIAS_NETPROTO(PF_ATMSVC);
diff --git a/net/atm/common.h b/net/atm/common.h
new file mode 100644
index 00000000000..e49ed41c0e3
--- /dev/null
+++ b/net/atm/common.h
@@ -0,0 +1,50 @@
+/* net/atm/common.h - ATM sockets (common part for PVC and SVC) */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_COMMON_H
+#define NET_ATM_COMMON_H
+
+#include <linux/net.h>
+#include <linux/poll.h> /* for poll_table */
+
+
+int vcc_create(struct socket *sock, int protocol, int family);
+int vcc_release(struct socket *sock);
+int vcc_connect(struct socket *sock, int itf, short vpi, int vci);
+int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
+ size_t size, int flags);
+int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
+ size_t total_len);
+unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait);
+int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
+int vcc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen);
+int vcc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen);
+
+int atmpvc_init(void);
+void atmpvc_exit(void);
+int atmsvc_init(void);
+void atmsvc_exit(void);
+
+#ifdef CONFIG_PROC_FS
+int atm_proc_init(void);
+void atm_proc_exit(void);
+#else
+static inline int atm_proc_init(void)
+{
+ return 0;
+}
+
+static inline void atm_proc_exit(void)
+{
+ /* nothing */
+}
+#endif /* CONFIG_PROC_FS */
+
+/* SVC */
+int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos);
+
+#endif
diff --git a/net/atm/ioctl.c b/net/atm/ioctl.c
new file mode 100644
index 00000000000..4dbb5af34a5
--- /dev/null
+++ b/net/atm/ioctl.c
@@ -0,0 +1,139 @@
+/* ATM ioctl handling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+/* 2003 John Levon <levon@movementarian.org> */
+
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/kmod.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h>
+#include <linux/atmclip.h> /* CLIP_*ENCAP */
+#include <linux/atmarp.h> /* manifest constants */
+#include <linux/sonet.h> /* for ioctls */
+#include <linux/atmsvc.h>
+#include <linux/atmmpc.h>
+#include <net/atmclip.h>
+#include <linux/atmlec.h>
+#include <asm/ioctls.h>
+
+#include "resources.h"
+#include "signaling.h" /* for WAITING and sigd_attach */
+
+
+static DECLARE_MUTEX(ioctl_mutex);
+static LIST_HEAD(ioctl_list);
+
+
+void register_atm_ioctl(struct atm_ioctl *ioctl)
+{
+ down(&ioctl_mutex);
+ list_add_tail(&ioctl->list, &ioctl_list);
+ up(&ioctl_mutex);
+}
+
+void deregister_atm_ioctl(struct atm_ioctl *ioctl)
+{
+ down(&ioctl_mutex);
+ list_del(&ioctl->list);
+ up(&ioctl_mutex);
+}
+
+EXPORT_SYMBOL(register_atm_ioctl);
+EXPORT_SYMBOL(deregister_atm_ioctl);
+
+int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+ int error;
+ struct list_head * pos;
+ void __user *argp = (void __user *)arg;
+
+ vcc = ATM_SD(sock);
+ switch (cmd) {
+ case SIOCOUTQ:
+ if (sock->state != SS_CONNECTED ||
+ !test_bit(ATM_VF_READY, &vcc->flags)) {
+ error = -EINVAL;
+ goto done;
+ }
+ error = put_user(sk->sk_sndbuf -
+ atomic_read(&sk->sk_wmem_alloc),
+ (int __user *) argp) ? -EFAULT : 0;
+ goto done;
+ case SIOCINQ:
+ {
+ struct sk_buff *skb;
+
+ if (sock->state != SS_CONNECTED) {
+ error = -EINVAL;
+ goto done;
+ }
+ skb = skb_peek(&sk->sk_receive_queue);
+ error = put_user(skb ? skb->len : 0,
+ (int __user *)argp) ? -EFAULT : 0;
+ goto done;
+ }
+ case SIOCGSTAMP: /* borrowed from IP */
+ error = sock_get_timestamp(sk, argp);
+ goto done;
+ case ATM_SETSC:
+ printk(KERN_WARNING "ATM_SETSC is obsolete\n");
+ error = 0;
+ goto done;
+ case ATMSIGD_CTRL:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ /*
+ * The user/kernel protocol for exchanging signalling
+ * info uses kernel pointers as opaque references,
+ * so the holder of the file descriptor can scribble
+ * on the kernel... so we should make sure that we
+ * have the same privledges that /proc/kcore needs
+ */
+ if (!capable(CAP_SYS_RAWIO)) {
+ error = -EPERM;
+ goto done;
+ }
+ error = sigd_attach(vcc);
+ if (!error)
+ sock->state = SS_CONNECTED;
+ goto done;
+ default:
+ break;
+ }
+
+ if (cmd == ATMMPC_CTRL || cmd == ATMMPC_DATA)
+ request_module("mpoa");
+ if (cmd == ATMARPD_CTRL)
+ request_module("clip");
+ if (cmd == ATMLEC_CTRL)
+ request_module("lec");
+
+ error = -ENOIOCTLCMD;
+
+ down(&ioctl_mutex);
+ list_for_each(pos, &ioctl_list) {
+ struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list);
+ if (try_module_get(ic->owner)) {
+ error = ic->ioctl(sock, cmd, arg);
+ module_put(ic->owner);
+ if (error != -ENOIOCTLCMD)
+ break;
+ }
+ }
+ up(&ioctl_mutex);
+
+ if (error != -ENOIOCTLCMD)
+ goto done;
+
+ error = atm_dev_ioctl(cmd, argp);
+
+done:
+ return error;
+}
diff --git a/net/atm/ipcommon.c b/net/atm/ipcommon.c
new file mode 100644
index 00000000000..181a3002d8a
--- /dev/null
+++ b/net/atm/ipcommon.c
@@ -0,0 +1,61 @@
+/* net/atm/ipcommon.c - Common items for all ways of doing IP over ATM */
+
+/* Written 1996-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/in.h>
+#include <linux/atmdev.h>
+#include <linux/atmclip.h>
+
+#include "common.h"
+#include "ipcommon.h"
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+/*
+ * skb_migrate appends the list at "from" to "to", emptying "from" in the
+ * process. skb_migrate is atomic with respect to all other skb operations on
+ * "from" and "to". Note that it locks both lists at the same time, so beware
+ * of potential deadlocks.
+ *
+ * This function should live in skbuff.c or skbuff.h.
+ */
+
+
+void skb_migrate(struct sk_buff_head *from,struct sk_buff_head *to)
+{
+ struct sk_buff *skb;
+ unsigned long flags;
+ struct sk_buff *skb_from = (struct sk_buff *) from;
+ struct sk_buff *skb_to = (struct sk_buff *) to;
+ struct sk_buff *prev;
+
+ spin_lock_irqsave(&from->lock,flags);
+ spin_lock(&to->lock);
+ prev = from->prev;
+ from->next->prev = to->prev;
+ prev->next = skb_to;
+ to->prev->next = from->next;
+ to->prev = from->prev;
+ for (skb = from->next; skb != skb_to; skb = skb->next)
+ skb->list = to;
+ to->qlen += from->qlen;
+ spin_unlock(&to->lock);
+ from->prev = skb_from;
+ from->next = skb_from;
+ from->qlen = 0;
+ spin_unlock_irqrestore(&from->lock,flags);
+}
+
+
+EXPORT_SYMBOL(skb_migrate);
diff --git a/net/atm/ipcommon.h b/net/atm/ipcommon.h
new file mode 100644
index 00000000000..d72165f6093
--- /dev/null
+++ b/net/atm/ipcommon.h
@@ -0,0 +1,22 @@
+/* net/atm/ipcommon.h - Common items for all ways of doing IP over ATM */
+
+/* Written 1996-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_IPCOMMON_H
+#define NET_ATM_IPCOMMON_H
+
+
+#include <linux/string.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/atmdev.h>
+
+/*
+ * Appends all skbs from "from" to "to". The operation is atomic with respect
+ * to all other skb operations on "from" or "to".
+ */
+
+void skb_migrate(struct sk_buff_head *from,struct sk_buff_head *to);
+
+#endif
diff --git a/net/atm/lec.c b/net/atm/lec.c
new file mode 100644
index 00000000000..a0752487026
--- /dev/null
+++ b/net/atm/lec.c
@@ -0,0 +1,2538 @@
+/*
+ * lec.c: Lan Emulation driver
+ * Marko Kiiskila mkiiskila@yahoo.com
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+
+/* We are ethernet device */
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/sock.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+#include <net/arp.h>
+#include <net/dst.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+/* TokenRing if needed */
+#ifdef CONFIG_TR
+#include <linux/trdevice.h>
+#endif
+
+/* And atm device */
+#include <linux/atmdev.h>
+#include <linux/atmlec.h>
+
+/* Proxy LEC knows about bridging */
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+#include <linux/if_bridge.h>
+#include "../bridge/br_private.h"
+
+static unsigned char bridge_ula_lec[] = {0x01, 0x80, 0xc2, 0x00, 0x00};
+#endif
+
+/* Modular too */
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "lec.h"
+#include "lec_arpc.h"
+#include "resources.h"
+
+#if 0
+#define DPRINTK printk
+#else
+#define DPRINTK(format,args...)
+#endif
+
+#define DUMP_PACKETS 0 /* 0 = None,
+ * 1 = 30 first bytes
+ * 2 = Whole packet
+ */
+
+#define LEC_UNRES_QUE_LEN 8 /* number of tx packets to queue for a
+ single destination while waiting for SVC */
+
+static int lec_open(struct net_device *dev);
+static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static int lec_close(struct net_device *dev);
+static struct net_device_stats *lec_get_stats(struct net_device *dev);
+static void lec_init(struct net_device *dev);
+static struct lec_arp_table* lec_arp_find(struct lec_priv *priv,
+ unsigned char *mac_addr);
+static int lec_arp_remove(struct lec_priv *priv,
+ struct lec_arp_table *to_remove);
+/* LANE2 functions */
+static void lane2_associate_ind (struct net_device *dev, u8 *mac_address,
+ u8 *tlvs, u32 sizeoftlvs);
+static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs);
+static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
+ u8 *tlvs, u32 sizeoftlvs);
+
+static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
+ unsigned long permanent);
+static void lec_arp_check_empties(struct lec_priv *priv,
+ struct atm_vcc *vcc, struct sk_buff *skb);
+static void lec_arp_destroy(struct lec_priv *priv);
+static void lec_arp_init(struct lec_priv *priv);
+static struct atm_vcc* lec_arp_resolve(struct lec_priv *priv,
+ unsigned char *mac_to_find,
+ int is_rdesc,
+ struct lec_arp_table **ret_entry);
+static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
+ unsigned char *atm_addr, unsigned long remoteflag,
+ unsigned int targetless_le_arp);
+static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
+static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
+static void lec_set_flush_tran_id(struct lec_priv *priv,
+ unsigned char *atm_addr,
+ unsigned long tran_id);
+static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
+ struct atm_vcc *vcc,
+ void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb));
+static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
+
+static struct lane2_ops lane2_ops = {
+ lane2_resolve, /* resolve, spec 3.1.3 */
+ lane2_associate_req, /* associate_req, spec 3.1.4 */
+ NULL /* associate indicator, spec 3.1.5 */
+};
+
+static unsigned char bus_mac[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff};
+
+/* Device structures */
+static struct net_device *dev_lec[MAX_LEC_ITF];
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ethhdr *eth;
+ char *buff;
+ struct lec_priv *priv;
+
+ /* Check if this is a BPDU. If so, ask zeppelin to send
+ * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
+ * as the Config BPDU has */
+ eth = (struct ethhdr *)skb->data;
+ buff = skb->data + skb->dev->hard_header_len;
+ if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
+ struct sock *sk;
+ struct sk_buff *skb2;
+ struct atmlec_msg *mesg;
+
+ skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (skb2 == NULL) return;
+ skb2->len = sizeof(struct atmlec_msg);
+ mesg = (struct atmlec_msg *)skb2->data;
+ mesg->type = l_topology_change;
+ buff += 4;
+ mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
+
+ priv = (struct lec_priv *)dev->priv;
+ atm_force_charge(priv->lecd, skb2->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb2);
+ sk->sk_data_ready(sk, skb2->len);
+ }
+
+ return;
+}
+#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
+
+/*
+ * Modelled after tr_type_trans
+ * All multicast and ARE or STE frames go to BUS.
+ * Non source routed frames go by destination address.
+ * Last hop source routed frames go by destination address.
+ * Not last hop source routed frames go by _next_ route descriptor.
+ * Returns pointer to destination MAC address or fills in rdesc
+ * and returns NULL.
+ */
+#ifdef CONFIG_TR
+static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
+{
+ struct trh_hdr *trh;
+ int riflen, num_rdsc;
+
+ trh = (struct trh_hdr *)packet;
+ if (trh->daddr[0] & (uint8_t)0x80)
+ return bus_mac; /* multicast */
+
+ if (trh->saddr[0] & TR_RII) {
+ riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
+ if ((ntohs(trh->rcf) >> 13) != 0)
+ return bus_mac; /* ARE or STE */
+ }
+ else
+ return trh->daddr; /* not source routed */
+
+ if (riflen < 6)
+ return trh->daddr; /* last hop, source routed */
+
+ /* riflen is 6 or more, packet has more than one route descriptor */
+ num_rdsc = (riflen/2) - 1;
+ memset(rdesc, 0, ETH_ALEN);
+ /* offset 4 comes from LAN destination field in LE control frames */
+ if (trh->rcf & htons((uint16_t)TR_RCF_DIR_BIT))
+ memcpy(&rdesc[4], &trh->rseg[num_rdsc-2], sizeof(uint16_t));
+ else {
+ memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
+ rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
+ }
+
+ return NULL;
+}
+#endif /* CONFIG_TR */
+
+/*
+ * Open/initialize the netdevice. This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+
+static int
+lec_open(struct net_device *dev)
+{
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+
+ netif_start_queue(dev);
+ memset(&priv->stats,0,sizeof(struct net_device_stats));
+
+ return 0;
+}
+
+static __inline__ void
+lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
+{
+ ATM_SKB(skb)->vcc = vcc;
+ ATM_SKB(skb)->atm_options = vcc->atm_options;
+
+ atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ if (vcc->send(vcc, skb) < 0) {
+ priv->stats.tx_dropped++;
+ return;
+ }
+
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len;
+}
+
+static void
+lec_tx_timeout(struct net_device *dev)
+{
+ printk(KERN_INFO "%s: tx timeout\n", dev->name);
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+}
+
+static int
+lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct sk_buff *skb2;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+ struct lecdatahdr_8023 *lec_h;
+ struct atm_vcc *vcc;
+ struct lec_arp_table *entry;
+ unsigned char *dst;
+ int min_frame_size;
+#ifdef CONFIG_TR
+ unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
+#endif
+ int is_rdesc;
+#if DUMP_PACKETS > 0
+ char buf[300];
+ int i=0;
+#endif /* DUMP_PACKETS >0 */
+
+ DPRINTK("lec_start_xmit called\n");
+ if (!priv->lecd) {
+ printk("%s:No lecd attached\n",dev->name);
+ priv->stats.tx_errors++;
+ netif_stop_queue(dev);
+ return -EUNATCH;
+ }
+
+ DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
+ (long)skb->head, (long)skb->data, (long)skb->tail,
+ (long)skb->end);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
+ lec_handle_bridge(skb, dev);
+#endif
+
+ /* Make sure we have room for lec_id */
+ if (skb_headroom(skb) < 2) {
+
+ DPRINTK("lec_start_xmit: reallocating skb\n");
+ skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
+ kfree_skb(skb);
+ if (skb2 == NULL) return 0;
+ skb = skb2;
+ }
+ skb_push(skb, 2);
+
+ /* Put le header to place, works for TokenRing too */
+ lec_h = (struct lecdatahdr_8023*)skb->data;
+ lec_h->le_header = htons(priv->lecid);
+
+#ifdef CONFIG_TR
+ /* Ugly. Use this to realign Token Ring packets for
+ * e.g. PCA-200E driver. */
+ if (priv->is_trdev) {
+ skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
+ kfree_skb(skb);
+ if (skb2 == NULL) return 0;
+ skb = skb2;
+ }
+#endif
+
+#if DUMP_PACKETS > 0
+ printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
+ skb->len, priv->lecid);
+#if DUMP_PACKETS >= 2
+ for(i=0;i<skb->len && i <99;i++) {
+ sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
+ }
+#elif DUMP_PACKETS >= 1
+ for(i=0;i<skb->len && i < 30;i++) {
+ sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
+ }
+#endif /* DUMP_PACKETS >= 1 */
+ if (i==skb->len)
+ printk("%s\n",buf);
+ else
+ printk("%s...\n",buf);
+#endif /* DUMP_PACKETS > 0 */
+
+ /* Minimum ethernet-frame size */
+#ifdef CONFIG_TR
+ if (priv->is_trdev)
+ min_frame_size = LEC_MINIMUM_8025_SIZE;
+ else
+#endif
+ min_frame_size = LEC_MINIMUM_8023_SIZE;
+ if (skb->len < min_frame_size) {
+ if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
+ skb2 = skb_copy_expand(skb, 0,
+ min_frame_size - skb->truesize, GFP_ATOMIC);
+ dev_kfree_skb(skb);
+ if (skb2 == NULL) {
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+ skb = skb2;
+ }
+ skb_put(skb, min_frame_size - skb->len);
+ }
+
+ /* Send to right vcc */
+ is_rdesc = 0;
+ dst = lec_h->h_dest;
+#ifdef CONFIG_TR
+ if (priv->is_trdev) {
+ dst = get_tr_dst(skb->data+2, rdesc);
+ if (dst == NULL) {
+ dst = rdesc;
+ is_rdesc = 1;
+ }
+ }
+#endif
+ entry = NULL;
+ vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
+ DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
+ vcc, vcc?vcc->flags:0, entry);
+ if (!vcc || !test_bit(ATM_VF_READY,&vcc->flags)) {
+ if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
+ DPRINTK("%s:lec_start_xmit: queuing packet, ", dev->name);
+ DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
+ lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
+ skb_queue_tail(&entry->tx_wait, skb);
+ } else {
+ DPRINTK("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", dev->name);
+ DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
+ lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
+ priv->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ }
+ return 0;
+ }
+
+#if DUMP_PACKETS > 0
+ printk("%s:sending to vpi:%d vci:%d\n", dev->name,
+ vcc->vpi, vcc->vci);
+#endif /* DUMP_PACKETS > 0 */
+
+ while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
+ DPRINTK("lec.c: emptying tx queue, ");
+ DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
+ lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
+ lec_send(vcc, skb2, priv);
+ }
+
+ lec_send(vcc, skb, priv);
+
+ if (!atm_may_send(vcc, 0)) {
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+
+ vpriv->xoff = 1;
+ netif_stop_queue(dev);
+
+ /*
+ * vcc->pop() might have occurred in between, making
+ * the vcc usuable again. Since xmit is serialized,
+ * this is the only situation we have to re-test.
+ */
+
+ if (atm_may_send(vcc, 0))
+ netif_wake_queue(dev);
+ }
+
+ dev->trans_start = jiffies;
+ return 0;
+}
+
+/* The inverse routine to net_open(). */
+static int
+lec_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+/*
+ * Get the current statistics.
+ * This may be called with the card open or closed.
+ */
+static struct net_device_stats *
+lec_get_stats(struct net_device *dev)
+{
+ return &((struct lec_priv *)dev->priv)->stats;
+}
+
+static int
+lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ unsigned long flags;
+ struct net_device *dev = (struct net_device*)vcc->proto_data;
+ struct lec_priv *priv = (struct lec_priv*)dev->priv;
+ struct atmlec_msg *mesg;
+ struct lec_arp_table *entry;
+ int i;
+ char *tmp; /* FIXME */
+
+ atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ mesg = (struct atmlec_msg *)skb->data;
+ tmp = skb->data;
+ tmp += sizeof(struct atmlec_msg);
+ DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
+ switch(mesg->type) {
+ case l_set_mac_addr:
+ for (i=0;i<6;i++) {
+ dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
+ }
+ break;
+ case l_del_mac_addr:
+ for(i=0;i<6;i++) {
+ dev->dev_addr[i] = 0;
+ }
+ break;
+ case l_addr_delete:
+ lec_addr_delete(priv, mesg->content.normal.atm_addr,
+ mesg->content.normal.flag);
+ break;
+ case l_topology_change:
+ priv->topology_change = mesg->content.normal.flag;
+ break;
+ case l_flush_complete:
+ lec_flush_complete(priv, mesg->content.normal.flag);
+ break;
+ case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
+ lec_arp_remove(priv, entry);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ if (mesg->content.normal.no_source_le_narp)
+ break;
+ /* FALL THROUGH */
+ case l_arp_update:
+ lec_arp_update(priv, mesg->content.normal.mac_addr,
+ mesg->content.normal.atm_addr,
+ mesg->content.normal.flag,
+ mesg->content.normal.targetless_le_arp);
+ DPRINTK("lec: in l_arp_update\n");
+ if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
+ DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n", mesg->sizeoftlvs);
+ lane2_associate_ind(dev,
+ mesg->content.normal.mac_addr,
+ tmp, mesg->sizeoftlvs);
+ }
+ break;
+ case l_config:
+ priv->maximum_unknown_frame_count =
+ mesg->content.config.maximum_unknown_frame_count;
+ priv->max_unknown_frame_time =
+ (mesg->content.config.max_unknown_frame_time*HZ);
+ priv->max_retry_count =
+ mesg->content.config.max_retry_count;
+ priv->aging_time = (mesg->content.config.aging_time*HZ);
+ priv->forward_delay_time =
+ (mesg->content.config.forward_delay_time*HZ);
+ priv->arp_response_time =
+ (mesg->content.config.arp_response_time*HZ);
+ priv->flush_timeout = (mesg->content.config.flush_timeout*HZ);
+ priv->path_switching_delay =
+ (mesg->content.config.path_switching_delay*HZ);
+ priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
+ priv->lane2_ops = NULL;
+ if (priv->lane_version > 1)
+ priv->lane2_ops = &lane2_ops;
+ if (dev->change_mtu(dev, mesg->content.config.mtu))
+ printk("%s: change_mtu to %d failed\n", dev->name,
+ mesg->content.config.mtu);
+ priv->is_proxy = mesg->content.config.is_proxy;
+ break;
+ case l_flush_tran_id:
+ lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
+ mesg->content.normal.flag);
+ break;
+ case l_set_lecid:
+ priv->lecid=(unsigned short)(0xffff&mesg->content.normal.flag);
+ break;
+ case l_should_bridge: {
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ struct net_bridge_fdb_entry *f;
+
+ DPRINTK("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ dev->name,
+ mesg->content.proxy.mac_addr[0], mesg->content.proxy.mac_addr[1],
+ mesg->content.proxy.mac_addr[2], mesg->content.proxy.mac_addr[3],
+ mesg->content.proxy.mac_addr[4], mesg->content.proxy.mac_addr[5]);
+
+ if (br_fdb_get_hook == NULL || dev->br_port == NULL)
+ break;
+
+ f = br_fdb_get_hook(dev->br_port->br, mesg->content.proxy.mac_addr);
+ if (f != NULL &&
+ f->dst->dev != dev &&
+ f->dst->state == BR_STATE_FORWARDING) {
+ /* hit from bridge table, send LE_ARP_RESPONSE */
+ struct sk_buff *skb2;
+ struct sock *sk;
+
+ DPRINTK("%s: entry found, responding to zeppelin\n", dev->name);
+ skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (skb2 == NULL) {
+ br_fdb_put_hook(f);
+ break;
+ }
+ skb2->len = sizeof(struct atmlec_msg);
+ memcpy(skb2->data, mesg, sizeof(struct atmlec_msg));
+ atm_force_charge(priv->lecd, skb2->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb2);
+ sk->sk_data_ready(sk, skb2->len);
+ }
+ if (f != NULL) br_fdb_put_hook(f);
+#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
+ }
+ break;
+ default:
+ printk("%s: Unknown message type %d\n", dev->name, mesg->type);
+ dev_kfree_skb(skb);
+ return -EINVAL;
+ }
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+static void
+lec_atm_close(struct atm_vcc *vcc)
+{
+ struct sk_buff *skb;
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+
+ priv->lecd = NULL;
+ /* Do something needful? */
+
+ netif_stop_queue(dev);
+ lec_arp_destroy(priv);
+
+ if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+ printk("%s lec_atm_close: closing with messages pending\n",
+ dev->name);
+ while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
+ atm_return(vcc, skb->truesize);
+ dev_kfree_skb(skb);
+ }
+
+ printk("%s: Shut down!\n", dev->name);
+ module_put(THIS_MODULE);
+}
+
+static struct atmdev_ops lecdev_ops = {
+ .close = lec_atm_close,
+ .send = lec_atm_send
+};
+
+static struct atm_dev lecatm_dev = {
+ .ops = &lecdev_ops,
+ .type = "lec",
+ .number = 999, /* dummy device number */
+ .lock = SPIN_LOCK_UNLOCKED
+};
+
+/*
+ * LANE2: new argument struct sk_buff *data contains
+ * the LE_ARP based TLVs introduced in the LANE2 spec
+ */
+static int
+send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
+ unsigned char *mac_addr, unsigned char *atm_addr,
+ struct sk_buff *data)
+{
+ struct sock *sk;
+ struct sk_buff *skb;
+ struct atmlec_msg *mesg;
+
+ if (!priv || !priv->lecd) {
+ return -1;
+ }
+ skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (!skb)
+ return -1;
+ skb->len = sizeof(struct atmlec_msg);
+ mesg = (struct atmlec_msg *)skb->data;
+ memset(mesg, 0, sizeof(struct atmlec_msg));
+ mesg->type = type;
+ if (data != NULL)
+ mesg->sizeoftlvs = data->len;
+ if (mac_addr)
+ memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
+ else
+ mesg->content.normal.targetless_le_arp = 1;
+ if (atm_addr)
+ memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
+
+ atm_force_charge(priv->lecd, skb->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+
+ if (data != NULL) {
+ DPRINTK("lec: about to send %d bytes of data\n", data->len);
+ atm_force_charge(priv->lecd, data->truesize);
+ skb_queue_tail(&sk->sk_receive_queue, data);
+ sk->sk_data_ready(sk, skb->len);
+ }
+
+ return 0;
+}
+
+/* shamelessly stolen from drivers/net/net_init.c */
+static int lec_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if ((new_mtu < 68) || (new_mtu > 18190))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static void lec_set_multicast_list(struct net_device *dev)
+{
+ /* by default, all multicast frames arrive over the bus.
+ * eventually support selective multicast service
+ */
+ return;
+}
+
+static void
+lec_init(struct net_device *dev)
+{
+ dev->change_mtu = lec_change_mtu;
+ dev->open = lec_open;
+ dev->stop = lec_close;
+ dev->hard_start_xmit = lec_start_xmit;
+ dev->tx_timeout = lec_tx_timeout;
+
+ dev->get_stats = lec_get_stats;
+ dev->set_multicast_list = lec_set_multicast_list;
+ dev->do_ioctl = NULL;
+ printk("%s: Initialized!\n",dev->name);
+ return;
+}
+
+static unsigned char lec_ctrl_magic[] = {
+ 0xff,
+ 0x00,
+ 0x01,
+ 0x01 };
+
+static void
+lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+
+#if DUMP_PACKETS >0
+ int i=0;
+ char buf[300];
+
+ printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
+ vcc->vpi, vcc->vci);
+#endif
+ if (!skb) {
+ DPRINTK("%s: null skb\n",dev->name);
+ lec_vcc_close(priv, vcc);
+ return;
+ }
+#if DUMP_PACKETS > 0
+ printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
+ skb->len, priv->lecid);
+#if DUMP_PACKETS >= 2
+ for(i=0;i<skb->len && i <99;i++) {
+ sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
+ }
+#elif DUMP_PACKETS >= 1
+ for(i=0;i<skb->len && i < 30;i++) {
+ sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
+ }
+#endif /* DUMP_PACKETS >= 1 */
+ if (i==skb->len)
+ printk("%s\n",buf);
+ else
+ printk("%s...\n",buf);
+#endif /* DUMP_PACKETS > 0 */
+ if (memcmp(skb->data, lec_ctrl_magic, 4) ==0) { /* Control frame, to daemon*/
+ struct sock *sk = sk_atm(vcc);
+
+ DPRINTK("%s: To daemon\n",dev->name);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+ } else { /* Data frame, queue to protocol handlers */
+ unsigned char *dst;
+
+ atm_return(vcc,skb->truesize);
+ if (*(uint16_t *)skb->data == htons(priv->lecid) ||
+ !priv->lecd ||
+ !(dev->flags & IFF_UP)) {
+ /* Probably looping back, or if lecd is missing,
+ lecd has gone down */
+ DPRINTK("Ignoring frame...\n");
+ dev_kfree_skb(skb);
+ return;
+ }
+#ifdef CONFIG_TR
+ if (priv->is_trdev) dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
+ else
+#endif
+ dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
+
+ if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */
+ !priv->is_proxy && /* Proxy wants all the packets */
+ memcmp(dst, dev->dev_addr, dev->addr_len)) {
+ dev_kfree_skb(skb);
+ return;
+ }
+ if (priv->lec_arp_empty_ones) {
+ lec_arp_check_empties(priv, vcc, skb);
+ }
+ skb->dev = dev;
+ skb_pull(skb, 2); /* skip lec_id */
+#ifdef CONFIG_TR
+ if (priv->is_trdev) skb->protocol = tr_type_trans(skb, dev);
+ else
+#endif
+ skb->protocol = eth_type_trans(skb, dev);
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+ }
+}
+
+static void
+lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+ struct net_device *dev = skb->dev;
+
+ if (vpriv == NULL) {
+ printk("lec_pop(): vpriv = NULL!?!?!?\n");
+ return;
+ }
+
+ vpriv->old_pop(vcc, skb);
+
+ if (vpriv->xoff && atm_may_send(vcc, 0)) {
+ vpriv->xoff = 0;
+ if (netif_running(dev) && netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
+}
+
+static int
+lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
+{
+ struct lec_vcc_priv *vpriv;
+ int bytes_left;
+ struct atmlec_ioc ioc_data;
+
+ /* Lecd must be up in this case */
+ bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
+ if (bytes_left != 0) {
+ printk("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
+ bytes_left);
+ }
+ if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
+ !dev_lec[ioc_data.dev_num])
+ return -EINVAL;
+ if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
+ return -ENOMEM;
+ vpriv->xoff = 0;
+ vpriv->old_pop = vcc->pop;
+ vcc->user_back = vpriv;
+ vcc->pop = lec_pop;
+ lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
+ &ioc_data, vcc, vcc->push);
+ vcc->proto_data = dev_lec[ioc_data.dev_num];
+ vcc->push = lec_push;
+ return 0;
+}
+
+static int
+lec_mcast_attach(struct atm_vcc *vcc, int arg)
+{
+ if (arg <0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
+ return -EINVAL;
+ vcc->proto_data = dev_lec[arg];
+ return (lec_mcast_make((struct lec_priv*)dev_lec[arg]->priv, vcc));
+}
+
+/* Initialize device. */
+static int
+lecd_attach(struct atm_vcc *vcc, int arg)
+{
+ int i;
+ struct lec_priv *priv;
+
+ if (arg<0)
+ i = 0;
+ else
+ i = arg;
+#ifdef CONFIG_TR
+ if (arg >= MAX_LEC_ITF)
+ return -EINVAL;
+#else /* Reserve the top NUM_TR_DEVS for TR */
+ if (arg >= (MAX_LEC_ITF-NUM_TR_DEVS))
+ return -EINVAL;
+#endif
+ if (!dev_lec[i]) {
+ int is_trdev, size;
+
+ is_trdev = 0;
+ if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
+ is_trdev = 1;
+
+ size = sizeof(struct lec_priv);
+#ifdef CONFIG_TR
+ if (is_trdev)
+ dev_lec[i] = alloc_trdev(size);
+ else
+#endif
+ dev_lec[i] = alloc_etherdev(size);
+ if (!dev_lec[i])
+ return -ENOMEM;
+ snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
+ if (register_netdev(dev_lec[i])) {
+ free_netdev(dev_lec[i]);
+ return -EINVAL;
+ }
+
+ priv = dev_lec[i]->priv;
+ priv->is_trdev = is_trdev;
+ lec_init(dev_lec[i]);
+ } else {
+ priv = dev_lec[i]->priv;
+ if (priv->lecd)
+ return -EADDRINUSE;
+ }
+ lec_arp_init(priv);
+ priv->itfnum = i; /* LANE2 addition */
+ priv->lecd = vcc;
+ vcc->dev = &lecatm_dev;
+ vcc_insert_socket(sk_atm(vcc));
+
+ vcc->proto_data = dev_lec[i];
+ set_bit(ATM_VF_META,&vcc->flags);
+ set_bit(ATM_VF_READY,&vcc->flags);
+
+ /* Set default values to these variables */
+ priv->maximum_unknown_frame_count = 1;
+ priv->max_unknown_frame_time = (1*HZ);
+ priv->vcc_timeout_period = (1200*HZ);
+ priv->max_retry_count = 1;
+ priv->aging_time = (300*HZ);
+ priv->forward_delay_time = (15*HZ);
+ priv->topology_change = 0;
+ priv->arp_response_time = (1*HZ);
+ priv->flush_timeout = (4*HZ);
+ priv->path_switching_delay = (6*HZ);
+
+ if (dev_lec[i]->flags & IFF_UP) {
+ netif_start_queue(dev_lec[i]);
+ }
+ __module_get(THIS_MODULE);
+ return i;
+}
+
+#ifdef CONFIG_PROC_FS
+static char* lec_arp_get_status_string(unsigned char status)
+{
+ static char *lec_arp_status_string[] = {
+ "ESI_UNKNOWN ",
+ "ESI_ARP_PENDING ",
+ "ESI_VC_PENDING ",
+ "<Undefined> ",
+ "ESI_FLUSH_PENDING ",
+ "ESI_FORWARD_DIRECT"
+ };
+
+ if (status > ESI_FORWARD_DIRECT)
+ status = 3; /* ESI_UNDEFINED */
+ return lec_arp_status_string[status];
+}
+
+static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
+{
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
+ seq_printf(seq, " ");
+ for (i = 0; i < ATM_ESA_LEN; i++)
+ seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
+ seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
+ entry->flags & 0xffff);
+ if (entry->vcc)
+ seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
+ else
+ seq_printf(seq, " ");
+ if (entry->recv_vcc) {
+ seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
+ entry->recv_vcc->vci);
+ }
+ seq_putc(seq, '\n');
+}
+
+
+struct lec_state {
+ unsigned long flags;
+ struct lec_priv *locked;
+ struct lec_arp_table *entry;
+ struct net_device *dev;
+ int itf;
+ int arp_table;
+ int misc_table;
+};
+
+static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl,
+ loff_t *l)
+{
+ struct lec_arp_table *e = state->entry;
+
+ if (!e)
+ e = tbl;
+ if (e == (void *)1) {
+ e = tbl;
+ --*l;
+ }
+ for (; e; e = e->next) {
+ if (--*l < 0)
+ break;
+ }
+ state->entry = e;
+ return (*l < 0) ? state : NULL;
+}
+
+static void *lec_arp_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ void *v = NULL;
+ int p;
+
+ for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
+ v = lec_tbl_walk(state, priv->lec_arp_tables[p], l);
+ if (v)
+ break;
+ }
+ state->arp_table = p;
+ return v;
+}
+
+static void *lec_misc_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ struct lec_arp_table *lec_misc_tables[] = {
+ priv->lec_arp_empty_ones,
+ priv->lec_no_forward,
+ priv->mcast_fwds
+ };
+ void *v = NULL;
+ int q;
+
+ for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
+ v = lec_tbl_walk(state, lec_misc_tables[q], l);
+ if (v)
+ break;
+ }
+ state->misc_table = q;
+ return v;
+}
+
+static void *lec_priv_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ if (!state->locked) {
+ state->locked = priv;
+ spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
+ }
+ if (!lec_arp_walk(state, l, priv) &&
+ !lec_misc_walk(state, l, priv)) {
+ spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
+ state->locked = NULL;
+ /* Partial state reset for the next time we get called */
+ state->arp_table = state->misc_table = 0;
+ }
+ return state->locked;
+}
+
+static void *lec_itf_walk(struct lec_state *state, loff_t *l)
+{
+ struct net_device *dev;
+ void *v;
+
+ dev = state->dev ? state->dev : dev_lec[state->itf];
+ v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
+ if (!v && dev) {
+ dev_put(dev);
+ /* Partial state reset for the next time we get called */
+ dev = NULL;
+ }
+ state->dev = dev;
+ return v;
+}
+
+static void *lec_get_idx(struct lec_state *state, loff_t l)
+{
+ void *v = NULL;
+
+ for (; state->itf < MAX_LEC_ITF; state->itf++) {
+ v = lec_itf_walk(state, &l);
+ if (v)
+ break;
+ }
+ return v;
+}
+
+static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct lec_state *state = seq->private;
+
+ state->itf = 0;
+ state->dev = NULL;
+ state->locked = NULL;
+ state->arp_table = 0;
+ state->misc_table = 0;
+ state->entry = (void *)1;
+
+ return *pos ? lec_get_idx(state, *pos) : (void*)1;
+}
+
+static void lec_seq_stop(struct seq_file *seq, void *v)
+{
+ struct lec_state *state = seq->private;
+
+ if (state->dev) {
+ spin_unlock_irqrestore(&state->locked->lec_arp_lock,
+ state->flags);
+ dev_put(state->dev);
+ }
+}
+
+static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct lec_state *state = seq->private;
+
+ v = lec_get_idx(state, 1);
+ *pos += !!PTR_ERR(v);
+ return v;
+}
+
+static int lec_seq_show(struct seq_file *seq, void *v)
+{
+ static char lec_banner[] = "Itf MAC ATM destination"
+ " Status Flags "
+ "VPI/VCI Recv VPI/VCI\n";
+
+ if (v == (void *)1)
+ seq_puts(seq, lec_banner);
+ else {
+ struct lec_state *state = seq->private;
+ struct net_device *dev = state->dev;
+
+ seq_printf(seq, "%s ", dev->name);
+ lec_info(seq, state->entry);
+ }
+ return 0;
+}
+
+static struct seq_operations lec_seq_ops = {
+ .start = lec_seq_start,
+ .next = lec_seq_next,
+ .stop = lec_seq_stop,
+ .show = lec_seq_show,
+};
+
+static int lec_seq_open(struct inode *inode, struct file *file)
+{
+ struct lec_state *state;
+ struct seq_file *seq;
+ int rc = -EAGAIN;
+
+ state = kmalloc(sizeof(*state), GFP_KERNEL);
+ if (!state) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = seq_open(file, &lec_seq_ops);
+ if (rc)
+ goto out_kfree;
+ seq = file->private_data;
+ seq->private = state;
+out:
+ return rc;
+
+out_kfree:
+ kfree(state);
+ goto out;
+}
+
+static int lec_seq_release(struct inode *inode, struct file *file)
+{
+ return seq_release_private(inode, file);
+}
+
+static struct file_operations lec_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = lec_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = lec_seq_release,
+};
+#endif
+
+static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int err = 0;
+
+ switch (cmd) {
+ case ATMLEC_CTRL:
+ case ATMLEC_MCAST:
+ case ATMLEC_DATA:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ switch (cmd) {
+ case ATMLEC_CTRL:
+ err = lecd_attach(vcc, (int) arg);
+ if (err >= 0)
+ sock->state = SS_CONNECTED;
+ break;
+ case ATMLEC_MCAST:
+ err = lec_mcast_attach(vcc, (int) arg);
+ break;
+ case ATMLEC_DATA:
+ err = lec_vcc_attach(vcc, (void __user *) arg);
+ break;
+ }
+
+ return err;
+}
+
+static struct atm_ioctl lane_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = lane_ioctl,
+};
+
+static int __init lane_module_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *p;
+
+ p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
+ if (p)
+ p->proc_fops = &lec_seq_fops;
+#endif
+
+ register_atm_ioctl(&lane_ioctl_ops);
+ printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
+ return 0;
+}
+
+static void __exit lane_module_cleanup(void)
+{
+ int i;
+ struct lec_priv *priv;
+
+ remove_proc_entry("lec", atm_proc_root);
+
+ deregister_atm_ioctl(&lane_ioctl_ops);
+
+ for (i = 0; i < MAX_LEC_ITF; i++) {
+ if (dev_lec[i] != NULL) {
+ priv = (struct lec_priv *)dev_lec[i]->priv;
+ unregister_netdev(dev_lec[i]);
+ free_netdev(dev_lec[i]);
+ dev_lec[i] = NULL;
+ }
+ }
+
+ return;
+}
+
+module_init(lane_module_init);
+module_exit(lane_module_cleanup);
+
+/*
+ * LANE2: 3.1.3, LE_RESOLVE.request
+ * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
+ * If sizeoftlvs == NULL the default TLVs associated with with this
+ * lec will be used.
+ * If dst_mac == NULL, targetless LE_ARP will be sent
+ */
+static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs)
+{
+ unsigned long flags;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+ struct lec_arp_table *table;
+ struct sk_buff *skb;
+ int retval;
+
+ if (force == 0) {
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ table = lec_arp_find(priv, dst_mac);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ if(table == NULL)
+ return -1;
+
+ *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
+ if (*tlvs == NULL)
+ return -1;
+
+ memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
+ *sizeoftlvs = table->sizeoftlvs;
+
+ return 0;
+ }
+
+ if (sizeoftlvs == NULL)
+ retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
+
+ else {
+ skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
+ if (skb == NULL)
+ return -1;
+ skb->len = *sizeoftlvs;
+ memcpy(skb->data, *tlvs, *sizeoftlvs);
+ retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
+ }
+ return retval;
+}
+
+
+/*
+ * LANE2: 3.1.4, LE_ASSOCIATE.request
+ * Associate the *tlvs with the *lan_dst address.
+ * Will overwrite any previous association
+ * Returns 1 for success, 0 for failure (out of memory)
+ *
+ */
+static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
+ u8 *tlvs, u32 sizeoftlvs)
+{
+ int retval;
+ struct sk_buff *skb;
+ struct lec_priv *priv = (struct lec_priv*)dev->priv;
+
+ if ( memcmp(lan_dst, dev->dev_addr, ETH_ALEN) != 0 )
+ return (0); /* not our mac address */
+
+ kfree(priv->tlvs); /* NULL if there was no previous association */
+
+ priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
+ if (priv->tlvs == NULL)
+ return (0);
+ priv->sizeoftlvs = sizeoftlvs;
+ memcpy(priv->tlvs, tlvs, sizeoftlvs);
+
+ skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
+ if (skb == NULL)
+ return 0;
+ skb->len = sizeoftlvs;
+ memcpy(skb->data, tlvs, sizeoftlvs);
+ retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
+ if (retval != 0)
+ printk("lec.c: lane2_associate_req() failed\n");
+ /* If the previous association has changed we must
+ * somehow notify other LANE entities about the change
+ */
+ return (1);
+}
+
+/*
+ * LANE2: 3.1.5, LE_ASSOCIATE.indication
+ *
+ */
+static void lane2_associate_ind (struct net_device *dev, u8 *mac_addr,
+ u8 *tlvs, u32 sizeoftlvs)
+{
+#if 0
+ int i = 0;
+#endif
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+#if 0 /* Why have the TLVs in LE_ARP entries since we do not use them? When you
+ uncomment this code, make sure the TLVs get freed when entry is killed */
+ struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
+
+ if (entry == NULL)
+ return; /* should not happen */
+
+ kfree(entry->tlvs);
+
+ entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
+ if (entry->tlvs == NULL)
+ return;
+
+ entry->sizeoftlvs = sizeoftlvs;
+ memcpy(entry->tlvs, tlvs, sizeoftlvs);
+#endif
+#if 0
+ printk("lec.c: lane2_associate_ind()\n");
+ printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
+ while (i < sizeoftlvs)
+ printk("%02x ", tlvs[i++]);
+
+ printk("\n");
+#endif
+
+ /* tell MPOA about the TLVs we saw */
+ if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
+ priv->lane2_ops->associate_indicator(dev, mac_addr,
+ tlvs, sizeoftlvs);
+ }
+ return;
+}
+
+/*
+ * Here starts what used to lec_arpc.c
+ *
+ * lec_arpc.c was added here when making
+ * lane client modular. October 1997
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <asm/param.h>
+#include <asm/atomic.h>
+#include <linux/inetdevice.h>
+#include <net/route.h>
+
+
+#if 0
+#define DPRINTK(format,args...)
+/*
+#define DPRINTK printk
+*/
+#endif
+#define DEBUG_ARP_TABLE 0
+
+#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
+
+static void lec_arp_check_expire(unsigned long data);
+static void lec_arp_expire_arp(unsigned long data);
+
+/*
+ * Arp table funcs
+ */
+
+#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
+
+/*
+ * Initialization of arp-cache
+ */
+static void
+lec_arp_init(struct lec_priv *priv)
+{
+ unsigned short i;
+
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ priv->lec_arp_tables[i] = NULL;
+ }
+ spin_lock_init(&priv->lec_arp_lock);
+ init_timer(&priv->lec_arp_timer);
+ priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL;
+ priv->lec_arp_timer.data = (unsigned long)priv;
+ priv->lec_arp_timer.function = lec_arp_check_expire;
+ add_timer(&priv->lec_arp_timer);
+}
+
+static void
+lec_arp_clear_vccs(struct lec_arp_table *entry)
+{
+ if (entry->vcc) {
+ struct atm_vcc *vcc = entry->vcc;
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+ struct net_device *dev = (struct net_device*) vcc->proto_data;
+
+ vcc->pop = vpriv->old_pop;
+ if (vpriv->xoff)
+ netif_wake_queue(dev);
+ kfree(vpriv);
+ vcc->user_back = NULL;
+ vcc->push = entry->old_push;
+ vcc_release_async(vcc, -EPIPE);
+ vcc = NULL;
+ }
+ if (entry->recv_vcc) {
+ entry->recv_vcc->push = entry->old_recv_push;
+ vcc_release_async(entry->recv_vcc, -EPIPE);
+ entry->recv_vcc = NULL;
+ }
+}
+
+/*
+ * Insert entry to lec_arp_table
+ * LANE2: Add to the end of the list to satisfy 8.1.13
+ */
+static inline void
+lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add)
+{
+ unsigned short place;
+ struct lec_arp_table *tmp;
+
+ place = HASH(to_add->mac_addr[ETH_ALEN-1]);
+ tmp = priv->lec_arp_tables[place];
+ to_add->next = NULL;
+ if (tmp == NULL)
+ priv->lec_arp_tables[place] = to_add;
+
+ else { /* add to the end */
+ while (tmp->next)
+ tmp = tmp->next;
+ tmp->next = to_add;
+ }
+
+ DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ 0xff&to_add->mac_addr[0], 0xff&to_add->mac_addr[1],
+ 0xff&to_add->mac_addr[2], 0xff&to_add->mac_addr[3],
+ 0xff&to_add->mac_addr[4], 0xff&to_add->mac_addr[5]);
+}
+
+/*
+ * Remove entry from lec_arp_table
+ */
+static int
+lec_arp_remove(struct lec_priv *priv,
+ struct lec_arp_table *to_remove)
+{
+ unsigned short place;
+ struct lec_arp_table *tmp;
+ int remove_vcc=1;
+
+ if (!to_remove) {
+ return -1;
+ }
+ place = HASH(to_remove->mac_addr[ETH_ALEN-1]);
+ tmp = priv->lec_arp_tables[place];
+ if (tmp == to_remove) {
+ priv->lec_arp_tables[place] = tmp->next;
+ } else {
+ while(tmp && tmp->next != to_remove) {
+ tmp = tmp->next;
+ }
+ if (!tmp) {/* Entry was not found */
+ return -1;
+ }
+ }
+ tmp->next = to_remove->next;
+ del_timer(&to_remove->timer);
+
+ /* If this is the only MAC connected to this VCC, also tear down
+ the VCC */
+ if (to_remove->status >= ESI_FLUSH_PENDING) {
+ /*
+ * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
+ */
+ for(place = 0; place < LEC_ARP_TABLE_SIZE; place++) {
+ for(tmp = priv->lec_arp_tables[place]; tmp != NULL; tmp = tmp->next) {
+ if (memcmp(tmp->atm_addr, to_remove->atm_addr,
+ ATM_ESA_LEN)==0) {
+ remove_vcc=0;
+ break;
+ }
+ }
+ }
+ if (remove_vcc)
+ lec_arp_clear_vccs(to_remove);
+ }
+ skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
+
+ DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ 0xff&to_remove->mac_addr[0], 0xff&to_remove->mac_addr[1],
+ 0xff&to_remove->mac_addr[2], 0xff&to_remove->mac_addr[3],
+ 0xff&to_remove->mac_addr[4], 0xff&to_remove->mac_addr[5]);
+ return 0;
+}
+
+#if DEBUG_ARP_TABLE
+static char*
+get_status_string(unsigned char st)
+{
+ switch(st) {
+ case ESI_UNKNOWN:
+ return "ESI_UNKNOWN";
+ case ESI_ARP_PENDING:
+ return "ESI_ARP_PENDING";
+ case ESI_VC_PENDING:
+ return "ESI_VC_PENDING";
+ case ESI_FLUSH_PENDING:
+ return "ESI_FLUSH_PENDING";
+ case ESI_FORWARD_DIRECT:
+ return "ESI_FORWARD_DIRECT";
+ default:
+ return "<UNKNOWN>";
+ }
+}
+#endif
+
+static void
+dump_arp_table(struct lec_priv *priv)
+{
+#if DEBUG_ARP_TABLE
+ int i,j, offset;
+ struct lec_arp_table *rulla;
+ char buf[1024];
+ struct lec_arp_table **lec_arp_tables =
+ (struct lec_arp_table **)priv->lec_arp_tables;
+ struct lec_arp_table *lec_arp_empty_ones =
+ (struct lec_arp_table *)priv->lec_arp_empty_ones;
+ struct lec_arp_table *lec_no_forward =
+ (struct lec_arp_table *)priv->lec_no_forward;
+ struct lec_arp_table *mcast_fwds = priv->mcast_fwds;
+
+
+ printk("Dump %p:\n",priv);
+ for (i=0;i<LEC_ARP_TABLE_SIZE;i++) {
+ rulla = lec_arp_tables[i];
+ offset = 0;
+ offset += sprintf(buf,"%d: %p\n",i, rulla);
+ while (rulla) {
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,
+ "%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,
+ "%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%p\n",rulla->next);
+ rulla = rulla->next;
+ }
+ printk("%s",buf);
+ }
+ rulla = lec_no_forward;
+ if (rulla)
+ printk("No forward\n");
+ while(rulla) {
+ offset=0;
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
+ rulla = rulla->next;
+ printk("%s",buf);
+ }
+ rulla = lec_arp_empty_ones;
+ if (rulla)
+ printk("Empty ones\n");
+ while(rulla) {
+ offset=0;
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
+ rulla = rulla->next;
+ printk("%s",buf);
+ }
+
+ rulla = mcast_fwds;
+ if (rulla)
+ printk("Multicast Forward VCCs\n");
+ while(rulla) {
+ offset=0;
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
+ rulla = rulla->next;
+ printk("%s",buf);
+ }
+
+#endif
+}
+
+/*
+ * Destruction of arp-cache
+ */
+static void
+lec_arp_destroy(struct lec_priv *priv)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *next;
+ int i;
+
+ del_timer_sync(&priv->lec_arp_timer);
+
+ /*
+ * Remove all entries
+ */
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(entry = priv->lec_arp_tables[i]; entry != NULL; entry=next) {
+ next = entry->next;
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ }
+ }
+ entry = priv->lec_arp_empty_ones;
+ while(entry) {
+ next = entry->next;
+ del_timer_sync(&entry->timer);
+ lec_arp_clear_vccs(entry);
+ kfree(entry);
+ entry = next;
+ }
+ priv->lec_arp_empty_ones = NULL;
+ entry = priv->lec_no_forward;
+ while(entry) {
+ next = entry->next;
+ del_timer_sync(&entry->timer);
+ lec_arp_clear_vccs(entry);
+ kfree(entry);
+ entry = next;
+ }
+ priv->lec_no_forward = NULL;
+ entry = priv->mcast_fwds;
+ while(entry) {
+ next = entry->next;
+ /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ lec_arp_clear_vccs(entry);
+ kfree(entry);
+ entry = next;
+ }
+ priv->mcast_fwds = NULL;
+ priv->mcast_vcc = NULL;
+ memset(priv->lec_arp_tables, 0,
+ sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+
+/*
+ * Find entry by mac_address
+ */
+static struct lec_arp_table*
+lec_arp_find(struct lec_priv *priv,
+ unsigned char *mac_addr)
+{
+ unsigned short place;
+ struct lec_arp_table *to_return;
+
+ DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ mac_addr[0]&0xff, mac_addr[1]&0xff, mac_addr[2]&0xff,
+ mac_addr[3]&0xff, mac_addr[4]&0xff, mac_addr[5]&0xff);
+ place = HASH(mac_addr[ETH_ALEN-1]);
+
+ to_return = priv->lec_arp_tables[place];
+ while(to_return) {
+ if (memcmp(mac_addr, to_return->mac_addr, ETH_ALEN) == 0) {
+ return to_return;
+ }
+ to_return = to_return->next;
+ }
+ return NULL;
+}
+
+static struct lec_arp_table*
+make_entry(struct lec_priv *priv, unsigned char *mac_addr)
+{
+ struct lec_arp_table *to_return;
+
+ to_return = (struct lec_arp_table *) kmalloc(sizeof(struct lec_arp_table),
+ GFP_ATOMIC);
+ if (!to_return) {
+ printk("LEC: Arp entry kmalloc failed\n");
+ return NULL;
+ }
+ memset(to_return, 0, sizeof(struct lec_arp_table));
+ memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
+ init_timer(&to_return->timer);
+ to_return->timer.function = lec_arp_expire_arp;
+ to_return->timer.data = (unsigned long) to_return;
+ to_return->last_used = jiffies;
+ to_return->priv = priv;
+ skb_queue_head_init(&to_return->tx_wait);
+ return to_return;
+}
+
+/*
+ *
+ * Arp sent timer expired
+ *
+ */
+static void
+lec_arp_expire_arp(unsigned long data)
+{
+ struct lec_arp_table *entry;
+
+ entry = (struct lec_arp_table *)data;
+
+ DPRINTK("lec_arp_expire_arp\n");
+ if (entry->status == ESI_ARP_PENDING) {
+ if (entry->no_tries <= entry->priv->max_retry_count) {
+ if (entry->is_rdesc)
+ send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL);
+ else
+ send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL);
+ entry->no_tries++;
+ }
+ mod_timer(&entry->timer, jiffies + (1*HZ));
+ }
+}
+
+/*
+ *
+ * Unknown/unused vcc expire, remove associated entry
+ *
+ */
+static void
+lec_arp_expire_vcc(unsigned long data)
+{
+ unsigned long flags;
+ struct lec_arp_table *to_remove = (struct lec_arp_table*)data;
+ struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
+ struct lec_arp_table *entry = NULL;
+
+ del_timer(&to_remove->timer);
+
+ DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
+ to_remove, priv,
+ to_remove->vcc?to_remove->recv_vcc->vpi:0,
+ to_remove->vcc?to_remove->recv_vcc->vci:0);
+ DPRINTK("eo:%p nf:%p\n",priv->lec_arp_empty_ones,priv->lec_no_forward);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ if (to_remove == priv->lec_arp_empty_ones)
+ priv->lec_arp_empty_ones = to_remove->next;
+ else {
+ entry = priv->lec_arp_empty_ones;
+ while (entry && entry->next != to_remove)
+ entry = entry->next;
+ if (entry)
+ entry->next = to_remove->next;
+ }
+ if (!entry) {
+ if (to_remove == priv->lec_no_forward) {
+ priv->lec_no_forward = to_remove->next;
+ } else {
+ entry = priv->lec_no_forward;
+ while (entry && entry->next != to_remove)
+ entry = entry->next;
+ if (entry)
+ entry->next = to_remove->next;
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ lec_arp_clear_vccs(to_remove);
+ kfree(to_remove);
+}
+
+/*
+ * Expire entries.
+ * 1. Re-set timer
+ * 2. For each entry, delete entries that have aged past the age limit.
+ * 3. For each entry, depending on the status of the entry, perform
+ * the following maintenance.
+ * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
+ * tick_count is above the max_unknown_frame_time, clear
+ * the tick_count to zero and clear the packets_flooded counter
+ * to zero. This supports the packet rate limit per address
+ * while flooding unknowns.
+ * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
+ * than or equal to the path_switching_delay, change the status
+ * to ESI_FORWARD_DIRECT. This causes the flush period to end
+ * regardless of the progress of the flush protocol.
+ */
+static void
+lec_arp_check_expire(unsigned long data)
+{
+ unsigned long flags;
+ struct lec_priv *priv = (struct lec_priv *)data;
+ struct lec_arp_table *entry, *next;
+ unsigned long now;
+ unsigned long time_to_check;
+ int i;
+
+ DPRINTK("lec_arp_check_expire %p\n",priv);
+ DPRINTK("expire: eo:%p nf:%p\n",priv->lec_arp_empty_ones,
+ priv->lec_no_forward);
+ now = jiffies;
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(entry = priv->lec_arp_tables[i]; entry != NULL; ) {
+ if ((entry->flags) & LEC_REMOTE_FLAG &&
+ priv->topology_change)
+ time_to_check = priv->forward_delay_time;
+ else
+ time_to_check = priv->aging_time;
+
+ DPRINTK("About to expire: %lx - %lx > %lx\n",
+ now,entry->last_used, time_to_check);
+ if( time_after(now, entry->last_used+
+ time_to_check) &&
+ !(entry->flags & LEC_PERMANENT_FLAG) &&
+ !(entry->mac_addr[0] & 0x01) ) { /* LANE2: 7.1.20 */
+ /* Remove entry */
+ DPRINTK("LEC:Entry timed out\n");
+ next = entry->next;
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ entry = next;
+ } else {
+ /* Something else */
+ if ((entry->status == ESI_VC_PENDING ||
+ entry->status == ESI_ARP_PENDING)
+ && time_after_eq(now,
+ entry->timestamp +
+ priv->max_unknown_frame_time)) {
+ entry->timestamp = jiffies;
+ entry->packets_flooded = 0;
+ if (entry->status == ESI_VC_PENDING)
+ send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL);
+ }
+ if (entry->status == ESI_FLUSH_PENDING
+ &&
+ time_after_eq(now, entry->timestamp+
+ priv->path_switching_delay)) {
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
+ lec_send(entry->vcc, skb, entry->priv);
+ entry->last_used = jiffies;
+ entry->status =
+ ESI_FORWARD_DIRECT;
+ }
+ entry = entry->next;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL);
+}
+/*
+ * Try to find vcc where mac_address is attached.
+ *
+ */
+static struct atm_vcc*
+lec_arp_resolve(struct lec_priv *priv, unsigned char *mac_to_find,
+ int is_rdesc, struct lec_arp_table **ret_entry)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ struct atm_vcc *found;
+
+ if (mac_to_find[0] & 0x01) {
+ switch (priv->lane_version) {
+ case 1:
+ return priv->mcast_vcc;
+ break;
+ case 2: /* LANE2 wants arp for multicast addresses */
+ if ( memcmp(mac_to_find, bus_mac, ETH_ALEN) == 0)
+ return priv->mcast_vcc;
+ break;
+ default:
+ break;
+ }
+ }
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mac_to_find);
+
+ if (entry) {
+ if (entry->status == ESI_FORWARD_DIRECT) {
+ /* Connection Ok */
+ entry->last_used = jiffies;
+ *ret_entry = entry;
+ found = entry->vcc;
+ goto out;
+ }
+ /* Data direct VC not yet set up, check to see if the unknown
+ frame count is greater than the limit. If the limit has
+ not been reached, allow the caller to send packet to
+ BUS. */
+ if (entry->status != ESI_FLUSH_PENDING &&
+ entry->packets_flooded<priv->maximum_unknown_frame_count) {
+ entry->packets_flooded++;
+ DPRINTK("LEC_ARP: Flooding..\n");
+ found = priv->mcast_vcc;
+ goto out;
+ }
+ /* We got here because entry->status == ESI_FLUSH_PENDING
+ * or BUS flood limit was reached for an entry which is
+ * in ESI_ARP_PENDING or ESI_VC_PENDING state.
+ */
+ *ret_entry = entry;
+ DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, entry->vcc);
+ found = NULL;
+ } else {
+ /* No matching entry was found */
+ entry = make_entry(priv, mac_to_find);
+ DPRINTK("LEC_ARP: Making entry\n");
+ if (!entry) {
+ found = priv->mcast_vcc;
+ goto out;
+ }
+ lec_arp_add(priv, entry);
+ /* We want arp-request(s) to be sent */
+ entry->packets_flooded =1;
+ entry->status = ESI_ARP_PENDING;
+ entry->no_tries = 1;
+ entry->last_used = entry->timestamp = jiffies;
+ entry->is_rdesc = is_rdesc;
+ if (entry->is_rdesc)
+ send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL);
+ else
+ send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
+ entry->timer.expires = jiffies + (1*HZ);
+ entry->timer.function = lec_arp_expire_arp;
+ add_timer(&entry->timer);
+ found = priv->mcast_vcc;
+ }
+
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return found;
+}
+
+static int
+lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
+ unsigned long permanent)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *next;
+ int i;
+
+ DPRINTK("lec_addr_delete\n");
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(entry = priv->lec_arp_tables[i]; entry != NULL; entry = next) {
+ next = entry->next;
+ if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
+ && (permanent ||
+ !(entry->flags & LEC_PERMANENT_FLAG))) {
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return -1;
+}
+
+/*
+ * Notifies: Response to arp_request (atm_addr != NULL)
+ */
+static void
+lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
+ unsigned char *atm_addr, unsigned long remoteflag,
+ unsigned int targetless_le_arp)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *tmp;
+ int i;
+
+ DPRINTK("lec:%s", (targetless_le_arp) ? "targetless ": " ");
+ DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
+ mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3],
+ mac_addr[4],mac_addr[5]);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mac_addr);
+ if (entry == NULL && targetless_le_arp)
+ goto out; /* LANE2: ignore targetless LE_ARPs for which
+ * we have no entry in the cache. 7.1.30
+ */
+ if (priv->lec_arp_empty_ones) {
+ entry = priv->lec_arp_empty_ones;
+ if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) {
+ priv->lec_arp_empty_ones = entry->next;
+ } else {
+ while(entry->next && memcmp(entry->next->atm_addr,
+ atm_addr, ATM_ESA_LEN))
+ entry = entry->next;
+ if (entry->next) {
+ tmp = entry;
+ entry = entry->next;
+ tmp->next = entry->next;
+ } else
+ entry = NULL;
+
+ }
+ if (entry) {
+ del_timer(&entry->timer);
+ tmp = lec_arp_find(priv, mac_addr);
+ if (tmp) {
+ del_timer(&tmp->timer);
+ tmp->status = ESI_FORWARD_DIRECT;
+ memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
+ tmp->vcc = entry->vcc;
+ tmp->old_push = entry->old_push;
+ tmp->last_used = jiffies;
+ del_timer(&entry->timer);
+ kfree(entry);
+ entry=tmp;
+ } else {
+ entry->status = ESI_FORWARD_DIRECT;
+ memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
+ entry->last_used = jiffies;
+ lec_arp_add(priv, entry);
+ }
+ if (remoteflag)
+ entry->flags|=LEC_REMOTE_FLAG;
+ else
+ entry->flags&=~LEC_REMOTE_FLAG;
+ DPRINTK("After update\n");
+ dump_arp_table(priv);
+ goto out;
+ }
+ }
+ entry = lec_arp_find(priv, mac_addr);
+ if (!entry) {
+ entry = make_entry(priv, mac_addr);
+ if (!entry)
+ goto out;
+ entry->status = ESI_UNKNOWN;
+ lec_arp_add(priv, entry);
+ /* Temporary, changes before end of function */
+ }
+ memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
+ del_timer(&entry->timer);
+ for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(tmp = priv->lec_arp_tables[i]; tmp; tmp=tmp->next) {
+ if (entry != tmp &&
+ !memcmp(tmp->atm_addr, atm_addr,
+ ATM_ESA_LEN)) {
+ /* Vcc to this host exists */
+ if (tmp->status > ESI_VC_PENDING) {
+ /*
+ * ESI_FLUSH_PENDING,
+ * ESI_FORWARD_DIRECT
+ */
+ entry->vcc = tmp->vcc;
+ entry->old_push=tmp->old_push;
+ }
+ entry->status=tmp->status;
+ break;
+ }
+ }
+ }
+ if (remoteflag)
+ entry->flags|=LEC_REMOTE_FLAG;
+ else
+ entry->flags&=~LEC_REMOTE_FLAG;
+ if (entry->status == ESI_ARP_PENDING ||
+ entry->status == ESI_UNKNOWN) {
+ entry->status = ESI_VC_PENDING;
+ send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
+ }
+ DPRINTK("After update2\n");
+ dump_arp_table(priv);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+/*
+ * Notifies: Vcc setup ready
+ */
+static void
+lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
+ struct atm_vcc *vcc,
+ void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb))
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i, found_entry=0;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ if (ioc_data->receive == 2) {
+ /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
+
+ DPRINTK("LEC_ARP: Attaching mcast forward\n");
+#if 0
+ entry = lec_arp_find(priv, bus_mac);
+ if (!entry) {
+ printk("LEC_ARP: Multicast entry not found!\n");
+ goto out;
+ }
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+#endif
+ entry = make_entry(priv, bus_mac);
+ if (entry == NULL)
+ goto out;
+ del_timer(&entry->timer);
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+ entry->next = priv->mcast_fwds;
+ priv->mcast_fwds = entry;
+ goto out;
+ } else if (ioc_data->receive == 1) {
+ /* Vcc which we don't want to make default vcc, attach it
+ anyway. */
+ DPRINTK("LEC_ARP:Attaching data direct, not default :%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
+ ioc_data->atm_addr[0],ioc_data->atm_addr[1],
+ ioc_data->atm_addr[2],ioc_data->atm_addr[3],
+ ioc_data->atm_addr[4],ioc_data->atm_addr[5],
+ ioc_data->atm_addr[6],ioc_data->atm_addr[7],
+ ioc_data->atm_addr[8],ioc_data->atm_addr[9],
+ ioc_data->atm_addr[10],ioc_data->atm_addr[11],
+ ioc_data->atm_addr[12],ioc_data->atm_addr[13],
+ ioc_data->atm_addr[14],ioc_data->atm_addr[15],
+ ioc_data->atm_addr[16],ioc_data->atm_addr[17],
+ ioc_data->atm_addr[18],ioc_data->atm_addr[19]);
+ entry = make_entry(priv, bus_mac);
+ if (entry == NULL)
+ goto out;
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ memset(entry->mac_addr, 0, ETH_ALEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+ entry->status = ESI_UNKNOWN;
+ entry->timer.expires = jiffies + priv->vcc_timeout_period;
+ entry->timer.function = lec_arp_expire_vcc;
+ add_timer(&entry->timer);
+ entry->next = priv->lec_no_forward;
+ priv->lec_no_forward = entry;
+ dump_arp_table(priv);
+ goto out;
+ }
+ DPRINTK("LEC_ARP:Attaching data direct, default:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
+ ioc_data->atm_addr[0],ioc_data->atm_addr[1],
+ ioc_data->atm_addr[2],ioc_data->atm_addr[3],
+ ioc_data->atm_addr[4],ioc_data->atm_addr[5],
+ ioc_data->atm_addr[6],ioc_data->atm_addr[7],
+ ioc_data->atm_addr[8],ioc_data->atm_addr[9],
+ ioc_data->atm_addr[10],ioc_data->atm_addr[11],
+ ioc_data->atm_addr[12],ioc_data->atm_addr[13],
+ ioc_data->atm_addr[14],ioc_data->atm_addr[15],
+ ioc_data->atm_addr[16],ioc_data->atm_addr[17],
+ ioc_data->atm_addr[18],ioc_data->atm_addr[19]);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) {
+ if (memcmp(ioc_data->atm_addr, entry->atm_addr,
+ ATM_ESA_LEN)==0) {
+ DPRINTK("LEC_ARP: Attaching data direct\n");
+ DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
+ entry->vcc?entry->vcc->vci:0,
+ entry->recv_vcc?entry->recv_vcc->vci:0);
+ found_entry=1;
+ del_timer(&entry->timer);
+ entry->vcc = vcc;
+ entry->old_push = old_push;
+ if (entry->status == ESI_VC_PENDING) {
+ if(priv->maximum_unknown_frame_count
+ ==0)
+ entry->status =
+ ESI_FORWARD_DIRECT;
+ else {
+ entry->timestamp = jiffies;
+ entry->status =
+ ESI_FLUSH_PENDING;
+#if 0
+ send_to_lecd(priv,l_flush_xmt,
+ NULL,
+ entry->atm_addr,
+ NULL);
+#endif
+ }
+ } else {
+ /* They were forming a connection
+ to us, and we to them. Our
+ ATM address is numerically lower
+ than theirs, so we make connection
+ we formed into default VCC (8.1.11).
+ Connection they made gets torn
+ down. This might confuse some
+ clients. Can be changed if
+ someone reports trouble... */
+ ;
+ }
+ }
+ }
+ }
+ if (found_entry) {
+ DPRINTK("After vcc was added\n");
+ dump_arp_table(priv);
+ goto out;
+ }
+ /* Not found, snatch address from first data packet that arrives from
+ this vcc */
+ entry = make_entry(priv, bus_mac);
+ if (!entry)
+ goto out;
+ entry->vcc = vcc;
+ entry->old_push = old_push;
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ memset(entry->mac_addr, 0, ETH_ALEN);
+ entry->status = ESI_UNKNOWN;
+ entry->next = priv->lec_arp_empty_ones;
+ priv->lec_arp_empty_ones = entry;
+ entry->timer.expires = jiffies + priv->vcc_timeout_period;
+ entry->timer.function = lec_arp_expire_vcc;
+ add_timer(&entry->timer);
+ DPRINTK("After vcc was added\n");
+ dump_arp_table(priv);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+static void
+lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i;
+
+ DPRINTK("LEC:lec_flush_complete %lx\n",tran_id);
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) {
+ if (entry->flush_tran_id == tran_id &&
+ entry->status == ESI_FLUSH_PENDING) {
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
+ lec_send(entry->vcc, skb, entry->priv);
+ entry->status = ESI_FORWARD_DIRECT;
+ DPRINTK("LEC_ARP: Flushed\n");
+ }
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ dump_arp_table(priv);
+}
+
+static void
+lec_set_flush_tran_id(struct lec_priv *priv,
+ unsigned char *atm_addr, unsigned long tran_id)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
+ for(entry = priv->lec_arp_tables[i]; entry; entry=entry->next)
+ if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
+ entry->flush_tran_id = tran_id;
+ DPRINTK("Set flush transaction id to %lx for %p\n",tran_id,entry);
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+static int
+lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
+{
+ unsigned long flags;
+ unsigned char mac_addr[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+ struct lec_arp_table *to_add;
+ struct lec_vcc_priv *vpriv;
+ int err = 0;
+
+ if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
+ return -ENOMEM;
+ vpriv->xoff = 0;
+ vpriv->old_pop = vcc->pop;
+ vcc->user_back = vpriv;
+ vcc->pop = lec_pop;
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ to_add = make_entry(priv, mac_addr);
+ if (!to_add) {
+ vcc->pop = vpriv->old_pop;
+ kfree(vpriv);
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
+ to_add->status = ESI_FORWARD_DIRECT;
+ to_add->flags |= LEC_PERMANENT_FLAG;
+ to_add->vcc = vcc;
+ to_add->old_push = vcc->push;
+ vcc->push = lec_push;
+ priv->mcast_vcc = vcc;
+ lec_arp_add(priv, to_add);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return err;
+}
+
+static void
+lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *next;
+ int i;
+
+ DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n",vcc->vpi,vcc->vci);
+ dump_arp_table(priv);
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for(i=0;i<LEC_ARP_TABLE_SIZE;i++) {
+ for(entry = priv->lec_arp_tables[i];entry; entry=next) {
+ next = entry->next;
+ if (vcc == entry->vcc) {
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ if (priv->mcast_vcc == vcc) {
+ priv->mcast_vcc = NULL;
+ }
+ }
+ }
+ }
+
+ entry = priv->lec_arp_empty_ones;
+ priv->lec_arp_empty_ones = NULL;
+ while (entry != NULL) {
+ next = entry->next;
+ if (entry->vcc == vcc) { /* leave it out from the list */
+ lec_arp_clear_vccs(entry);
+ del_timer(&entry->timer);
+ kfree(entry);
+ }
+ else { /* put it back to the list */
+ entry->next = priv->lec_arp_empty_ones;
+ priv->lec_arp_empty_ones = entry;
+ }
+ entry = next;
+ }
+
+ entry = priv->lec_no_forward;
+ priv->lec_no_forward = NULL;
+ while (entry != NULL) {
+ next = entry->next;
+ if (entry->recv_vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ del_timer(&entry->timer);
+ kfree(entry);
+ }
+ else {
+ entry->next = priv->lec_no_forward;
+ priv->lec_no_forward = entry;
+ }
+ entry = next;
+ }
+
+ entry = priv->mcast_fwds;
+ priv->mcast_fwds = NULL;
+ while (entry != NULL) {
+ next = entry->next;
+ if (entry->recv_vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ kfree(entry);
+ }
+ else {
+ entry->next = priv->mcast_fwds;
+ priv->mcast_fwds = entry;
+ }
+ entry = next;
+ }
+
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ dump_arp_table(priv);
+}
+
+static void
+lec_arp_check_empties(struct lec_priv *priv,
+ struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *prev;
+ struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
+ unsigned char *src;
+#ifdef CONFIG_TR
+ struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
+
+ if (priv->is_trdev) src = tr_hdr->h_source;
+ else
+#endif
+ src = hdr->h_source;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = priv->lec_arp_empty_ones;
+ if (vcc == entry->vcc) {
+ del_timer(&entry->timer);
+ memcpy(entry->mac_addr, src, ETH_ALEN);
+ entry->status = ESI_FORWARD_DIRECT;
+ entry->last_used = jiffies;
+ priv->lec_arp_empty_ones = entry->next;
+ /* We might have got an entry */
+ if ((prev = lec_arp_find(priv,src))) {
+ lec_arp_remove(priv, prev);
+ kfree(prev);
+ }
+ lec_arp_add(priv, entry);
+ goto out;
+ }
+ prev = entry;
+ entry = entry->next;
+ while (entry && entry->vcc != vcc) {
+ prev= entry;
+ entry = entry->next;
+ }
+ if (!entry) {
+ DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
+ goto out;
+ }
+ del_timer(&entry->timer);
+ memcpy(entry->mac_addr, src, ETH_ALEN);
+ entry->status = ESI_FORWARD_DIRECT;
+ entry->last_used = jiffies;
+ prev->next = entry->next;
+ if ((prev = lec_arp_find(priv, src))) {
+ lec_arp_remove(priv, prev);
+ kfree(prev);
+ }
+ lec_arp_add(priv, entry);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+MODULE_LICENSE("GPL");
diff --git a/net/atm/lec.h b/net/atm/lec.h
new file mode 100644
index 00000000000..6606082b29a
--- /dev/null
+++ b/net/atm/lec.h
@@ -0,0 +1,142 @@
+/*
+ *
+ * Lan Emulation client header file
+ *
+ * Marko Kiiskila mkiiskila@yahoo.com
+ *
+ */
+
+#ifndef _LEC_H_
+#define _LEC_H_
+
+#include <linux/config.h>
+#include <linux/atmdev.h>
+#include <linux/netdevice.h>
+#include <linux/atmlec.h>
+
+#define LEC_HEADER_LEN 16
+
+struct lecdatahdr_8023 {
+ unsigned short le_header;
+ unsigned char h_dest[ETH_ALEN];
+ unsigned char h_source[ETH_ALEN];
+ unsigned short h_type;
+};
+
+struct lecdatahdr_8025 {
+ unsigned short le_header;
+ unsigned char ac_pad;
+ unsigned char fc;
+ unsigned char h_dest[ETH_ALEN];
+ unsigned char h_source[ETH_ALEN];
+};
+
+#define LEC_MINIMUM_8023_SIZE 62
+#define LEC_MINIMUM_8025_SIZE 16
+
+/*
+ * Operations that LANE2 capable device can do. Two first functions
+ * are used to make the device do things. See spec 3.1.3 and 3.1.4.
+ *
+ * The third function is intented for the MPOA component sitting on
+ * top of the LANE device. The MPOA component assigns it's own function
+ * to (*associate_indicator)() and the LANE device will use that
+ * function to tell about TLVs it sees floating through.
+ *
+ */
+struct lane2_ops {
+ int (*resolve)(struct net_device *dev, u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs);
+ int (*associate_req)(struct net_device *dev, u8 *lan_dst,
+ u8 *tlvs, u32 sizeoftlvs);
+ void (*associate_indicator)(struct net_device *dev, u8 *mac_addr,
+ u8 *tlvs, u32 sizeoftlvs);
+};
+
+/*
+ * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType
+ * frames.
+ * 1. Dix Ethernet EtherType frames encoded by placing EtherType
+ * field in h_type field. Data follows immediatelly after header.
+ * 2. LLC Data frames whose total length, including LLC field and data,
+ * but not padding required to meet the minimum data frame length,
+ * is less than 1536(0x0600) MUST be encoded by placing that length
+ * in the h_type field. The LLC field follows header immediatelly.
+ * 3. LLC data frames longer than this maximum MUST be encoded by placing
+ * the value 0 in the h_type field.
+ *
+ */
+
+/* Hash table size */
+#define LEC_ARP_TABLE_SIZE 16
+
+struct lec_priv {
+ struct net_device_stats stats;
+ unsigned short lecid; /* Lecid of this client */
+ struct lec_arp_table *lec_arp_empty_ones;
+ /* Used for storing VCC's that don't have a MAC address attached yet */
+ struct lec_arp_table *lec_arp_tables[LEC_ARP_TABLE_SIZE];
+ /* Actual LE ARP table */
+ struct lec_arp_table *lec_no_forward;
+ /* Used for storing VCC's (and forward packets from) which are to
+ age out by not using them to forward packets.
+ This is because to some LE clients there will be 2 VCCs. Only
+ one of them gets used. */
+ struct lec_arp_table *mcast_fwds;
+ /* With LANEv2 it is possible that BUS (or a special multicast server)
+ establishes multiple Multicast Forward VCCs to us. This list
+ collects all those VCCs. LANEv1 client has only one item in this
+ list. These entries are not aged out. */
+ spinlock_t lec_arp_lock;
+ struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */
+ struct atm_vcc *lecd;
+ struct timer_list lec_arp_timer;
+ /* C10 */
+ unsigned int maximum_unknown_frame_count;
+/* Within the period of time defined by this variable, the client will send
+ no more than C10 frames to BUS for a given unicast destination. (C11) */
+ unsigned long max_unknown_frame_time;
+/* If no traffic has been sent in this vcc for this period of time,
+ vcc will be torn down (C12)*/
+ unsigned long vcc_timeout_period;
+/* An LE Client MUST not retry an LE_ARP_REQUEST for a
+ given frame's LAN Destination more than maximum retry count times,
+ after the first LEC_ARP_REQUEST (C13)*/
+ unsigned short max_retry_count;
+/* Max time the client will maintain an entry in its arp cache in
+ absence of a verification of that relationship (C17)*/
+ unsigned long aging_time;
+/* Max time the client will maintain an entry in cache when
+ topology change flag is true (C18) */
+ unsigned long forward_delay_time;
+/* Topology change flag (C19)*/
+ int topology_change;
+/* Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE
+ cycle to take (C20)*/
+ unsigned long arp_response_time;
+/* Time limit ot wait to receive an LE_FLUSH_RESPONSE after the
+ LE_FLUSH_REQUEST has been sent before taking recover action. (C21)*/
+ unsigned long flush_timeout;
+/* The time since sending a frame to the bus after which the
+ LE Client may assume that the frame has been either discarded or
+ delivered to the recipient (C22) */
+ unsigned long path_switching_delay;
+
+ u8 *tlvs; /* LANE2: TLVs are new */
+ u32 sizeoftlvs; /* The size of the tlv array in bytes */
+ int lane_version; /* LANE2 */
+ int itfnum; /* e.g. 2 for lec2, 5 for lec5 */
+ struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */
+ int is_proxy; /* bridge between ATM and Ethernet */
+ int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */
+};
+
+struct lec_vcc_priv {
+ void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
+ int xoff;
+};
+
+#define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back))
+
+#endif /* _LEC_H_ */
+
diff --git a/net/atm/lec_arpc.h b/net/atm/lec_arpc.h
new file mode 100644
index 00000000000..39744809464
--- /dev/null
+++ b/net/atm/lec_arpc.h
@@ -0,0 +1,92 @@
+/*
+ * Lec arp cache
+ * Marko Kiiskila mkiiskila@yahoo.com
+ *
+ */
+#ifndef _LEC_ARP_H
+#define _LEC_ARP_H
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/if_ether.h>
+#include <linux/atmlec.h>
+
+struct lec_arp_table {
+ struct lec_arp_table *next; /* Linked entry list */
+ unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */
+ unsigned char mac_addr[ETH_ALEN]; /* Mac address */
+ int is_rdesc; /* Mac address is a route descriptor */
+ struct atm_vcc *vcc; /* Vcc this entry is attached */
+ struct atm_vcc *recv_vcc; /* Vcc we receive data from */
+ void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb);
+ /* Push that leads to daemon */
+ void (*old_recv_push)(struct atm_vcc *vcc, struct sk_buff *skb);
+ /* Push that leads to daemon */
+ void (*old_close)(struct atm_vcc *vcc);
+ /* We want to see when this
+ * vcc gets closed */
+ unsigned long last_used; /* For expiry */
+ unsigned long timestamp; /* Used for various timestamping
+ * things:
+ * 1. FLUSH started
+ * (status=ESI_FLUSH_PENDING)
+ * 2. Counting to
+ * max_unknown_frame_time
+ * (status=ESI_ARP_PENDING||
+ * status=ESI_VC_PENDING)
+ */
+ unsigned char no_tries; /* No of times arp retry has been
+ tried */
+ unsigned char status; /* Status of this entry */
+ unsigned short flags; /* Flags for this entry */
+ unsigned short packets_flooded; /* Data packets flooded */
+ unsigned long flush_tran_id; /* Transaction id in flush protocol */
+ struct timer_list timer; /* Arping timer */
+ struct lec_priv *priv; /* Pointer back */
+
+ u8 *tlvs; /* LANE2: Each MAC address can have TLVs */
+ u32 sizeoftlvs; /* associated with it. sizeoftlvs tells the */
+ /* the length of the tlvs array */
+ struct sk_buff_head tx_wait; /* wait queue for outgoing packets */
+};
+
+struct tlv { /* LANE2: Template tlv struct for accessing */
+ /* the tlvs in the lec_arp_table->tlvs array*/
+ u32 type;
+ u8 length;
+ u8 value[255];
+};
+
+/* Status fields */
+#define ESI_UNKNOWN 0 /*
+ * Next packet sent to this mac address
+ * causes ARP-request to be sent
+ */
+#define ESI_ARP_PENDING 1 /*
+ * There is no ATM address associated with this
+ * 48-bit address. The LE-ARP protocol is in
+ * progress.
+ */
+#define ESI_VC_PENDING 2 /*
+ * There is a valid ATM address associated with
+ * this 48-bit address but there is no VC set
+ * up to that ATM address. The signaling
+ * protocol is in process.
+ */
+#define ESI_FLUSH_PENDING 4 /*
+ * The LEC has been notified of the FLUSH_START
+ * status and it is assumed that the flush
+ * protocol is in process.
+ */
+#define ESI_FORWARD_DIRECT 5 /*
+ * Either the Path Switching Delay (C22) has
+ * elapsed or the LEC has notified the Mapping
+ * that the flush protocol has completed. In
+ * either case, it is safe to forward packets
+ * to this address via the data direct VC.
+ */
+
+/* Flag values */
+#define LEC_REMOTE_FLAG 0x0001
+#define LEC_PERMANENT_FLAG 0x0002
+
+#endif
diff --git a/net/atm/mpc.c b/net/atm/mpc.c
new file mode 100644
index 00000000000..17a81ebe7e6
--- /dev/null
+++ b/net/atm/mpc.c
@@ -0,0 +1,1514 @@
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+#include <linux/seq_file.h>
+
+/* We are an ethernet device */
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/sock.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+#include <net/checksum.h> /* for ip_fast_csum() */
+#include <net/arp.h>
+#include <net/dst.h>
+#include <linux/proc_fs.h>
+
+/* And atm device */
+#include <linux/atmdev.h>
+#include <linux/atmlec.h>
+#include <linux/atmmpc.h>
+/* Modular too */
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include "lec.h"
+#include "mpc.h"
+#include "resources.h"
+
+/*
+ * mpc.c: Implementation of MPOA client kernel part
+ */
+
+#if 0
+#define dprintk printk /* debug */
+#else
+#define dprintk(format,args...)
+#endif
+
+#if 0
+#define ddprintk printk /* more debug */
+#else
+#define ddprintk(format,args...)
+#endif
+
+
+
+#define MPOA_TAG_LEN 4
+
+/* mpc_daemon -> kernel */
+static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc);
+static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void mps_death(struct k_message *msg, struct mpoa_client *mpc);
+static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action);
+static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc);
+static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc);
+static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc);
+
+static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
+ uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type);
+static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry);
+
+static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc);
+static void mpoad_close(struct atm_vcc *vcc);
+static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb);
+
+static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb);
+static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev);
+static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev);
+static void mpc_timer_refresh(void);
+static void mpc_cache_check( unsigned long checking_time );
+
+static struct llc_snap_hdr llc_snap_mpoa_ctrl = {
+ 0xaa, 0xaa, 0x03,
+ {0x00, 0x00, 0x5e},
+ {0x00, 0x03} /* For MPOA control PDUs */
+};
+static struct llc_snap_hdr llc_snap_mpoa_data = {
+ 0xaa, 0xaa, 0x03,
+ {0x00, 0x00, 0x00},
+ {0x08, 0x00} /* This is for IP PDUs only */
+};
+static struct llc_snap_hdr llc_snap_mpoa_data_tagged = {
+ 0xaa, 0xaa, 0x03,
+ {0x00, 0x00, 0x00},
+ {0x88, 0x4c} /* This is for tagged data PDUs */
+};
+
+static struct notifier_block mpoa_notifier = {
+ mpoa_event_listener,
+ NULL,
+ 0
+};
+
+#ifdef CONFIG_PROC_FS
+extern int mpc_proc_init(void);
+extern void mpc_proc_clean(void);
+#endif
+
+struct mpoa_client *mpcs = NULL; /* FIXME */
+static struct atm_mpoa_qos *qos_head = NULL;
+static struct timer_list mpc_timer = TIMER_INITIALIZER(NULL, 0, 0);
+
+
+static struct mpoa_client *find_mpc_by_itfnum(int itf)
+{
+ struct mpoa_client *mpc;
+
+ mpc = mpcs; /* our global linked list */
+ while (mpc != NULL) {
+ if (mpc->dev_num == itf)
+ return mpc;
+ mpc = mpc->next;
+ }
+
+ return NULL; /* not found */
+}
+
+static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc)
+{
+ struct mpoa_client *mpc;
+
+ mpc = mpcs; /* our global linked list */
+ while (mpc != NULL) {
+ if (mpc->mpoad_vcc == vcc)
+ return mpc;
+ mpc = mpc->next;
+ }
+
+ return NULL; /* not found */
+}
+
+static struct mpoa_client *find_mpc_by_lec(struct net_device *dev)
+{
+ struct mpoa_client *mpc;
+
+ mpc = mpcs; /* our global linked list */
+ while (mpc != NULL) {
+ if (mpc->dev == dev)
+ return mpc;
+ mpc = mpc->next;
+ }
+
+ return NULL; /* not found */
+}
+
+/*
+ * Functions for managing QoS list
+ */
+
+/*
+ * Overwrites the old entry or makes a new one.
+ */
+struct atm_mpoa_qos *atm_mpoa_add_qos(uint32_t dst_ip, struct atm_qos *qos)
+{
+ struct atm_mpoa_qos *entry;
+
+ entry = atm_mpoa_search_qos(dst_ip);
+ if (entry != NULL) {
+ entry->qos = *qos;
+ return entry;
+ }
+
+ entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL);
+ if (entry == NULL) {
+ printk("mpoa: atm_mpoa_add_qos: out of memory\n");
+ return entry;
+ }
+
+ entry->ipaddr = dst_ip;
+ entry->qos = *qos;
+
+ entry->next = qos_head;
+ qos_head = entry;
+
+ return entry;
+}
+
+struct atm_mpoa_qos *atm_mpoa_search_qos(uint32_t dst_ip)
+{
+ struct atm_mpoa_qos *qos;
+
+ qos = qos_head;
+ while( qos != NULL ){
+ if(qos->ipaddr == dst_ip) {
+ break;
+ }
+ qos = qos->next;
+ }
+
+ return qos;
+}
+
+/*
+ * Returns 0 for failure
+ */
+int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry)
+{
+
+ struct atm_mpoa_qos *curr;
+
+ if (entry == NULL) return 0;
+ if (entry == qos_head) {
+ qos_head = qos_head->next;
+ kfree(entry);
+ return 1;
+ }
+
+ curr = qos_head;
+ while (curr != NULL) {
+ if (curr->next == entry) {
+ curr->next = entry->next;
+ kfree(entry);
+ return 1;
+ }
+ curr = curr->next;
+ }
+
+ return 0;
+}
+
+/* this is buggered - we need locking for qos_head */
+void atm_mpoa_disp_qos(struct seq_file *m)
+{
+ unsigned char *ip;
+ char ipaddr[16];
+ struct atm_mpoa_qos *qos;
+
+ qos = qos_head;
+ seq_printf(m, "QoS entries for shortcuts:\n");
+ seq_printf(m, "IP address\n TX:max_pcr pcr min_pcr max_cdv max_sdu\n RX:max_pcr pcr min_pcr max_cdv max_sdu\n");
+
+ ipaddr[sizeof(ipaddr)-1] = '\0';
+ while (qos != NULL) {
+ ip = (unsigned char *)&qos->ipaddr;
+ sprintf(ipaddr, "%u.%u.%u.%u", NIPQUAD(ip));
+ seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n",
+ NIPQUAD(ipaddr),
+ qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu,
+ qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu);
+ qos = qos->next;
+ }
+}
+
+static struct net_device *find_lec_by_itfnum(int itf)
+{
+ struct net_device *dev;
+ char name[IFNAMSIZ];
+
+ sprintf(name, "lec%d", itf);
+ dev = dev_get_by_name(name);
+
+ return dev;
+}
+
+static struct mpoa_client *alloc_mpc(void)
+{
+ struct mpoa_client *mpc;
+
+ mpc = kmalloc(sizeof (struct mpoa_client), GFP_KERNEL);
+ if (mpc == NULL)
+ return NULL;
+ memset(mpc, 0, sizeof(struct mpoa_client));
+ rwlock_init(&mpc->ingress_lock);
+ rwlock_init(&mpc->egress_lock);
+ mpc->next = mpcs;
+ atm_mpoa_init_cache(mpc);
+
+ mpc->parameters.mpc_p1 = MPC_P1;
+ mpc->parameters.mpc_p2 = MPC_P2;
+ memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3));
+ mpc->parameters.mpc_p4 = MPC_P4;
+ mpc->parameters.mpc_p5 = MPC_P5;
+ mpc->parameters.mpc_p6 = MPC_P6;
+
+ mpcs = mpc;
+
+ return mpc;
+}
+
+/*
+ *
+ * start_mpc() puts the MPC on line. All the packets destined
+ * to the lec underneath us are now being monitored and
+ * shortcuts will be established.
+ *
+ */
+static void start_mpc(struct mpoa_client *mpc, struct net_device *dev)
+{
+
+ dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name);
+ if (dev->hard_start_xmit == NULL) {
+ printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n",
+ dev->name);
+ return;
+ }
+ mpc->old_hard_start_xmit = dev->hard_start_xmit;
+ dev->hard_start_xmit = mpc_send_packet;
+
+ return;
+}
+
+static void stop_mpc(struct mpoa_client *mpc)
+{
+
+ dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name);
+
+ /* Lets not nullify lec device's dev->hard_start_xmit */
+ if (mpc->dev->hard_start_xmit != mpc_send_packet) {
+ dprintk(" mpc already stopped, not fatal\n");
+ return;
+ }
+ dprintk("\n");
+ mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit;
+ mpc->old_hard_start_xmit = NULL;
+ /* close_shortcuts(mpc); ??? FIXME */
+
+ return;
+}
+
+static const char *mpoa_device_type_string(char type) __attribute__ ((unused));
+
+static const char *mpoa_device_type_string(char type)
+{
+ switch(type) {
+ case NON_MPOA:
+ return "non-MPOA device";
+ break;
+ case MPS:
+ return "MPS";
+ break;
+ case MPC:
+ return "MPC";
+ break;
+ case MPS_AND_MPC:
+ return "both MPS and MPC";
+ break;
+ default:
+ return "unspecified (non-MPOA) device";
+ break;
+ }
+
+ return ""; /* not reached */
+}
+
+/*
+ * lec device calls this via its dev->priv->lane2_ops->associate_indicator()
+ * when it sees a TLV in LE_ARP packet.
+ * We fill in the pointer above when we see a LANE2 lec initializing
+ * See LANE2 spec 3.1.5
+ *
+ * Quite a big and ugly function but when you look at it
+ * all it does is to try to locate and parse MPOA Device
+ * Type TLV.
+ * We give our lec a pointer to this function and when the
+ * lec sees a TLV it uses the pointer to call this function.
+ *
+ */
+static void lane2_assoc_ind(struct net_device *dev, uint8_t *mac_addr,
+ uint8_t *tlvs, uint32_t sizeoftlvs)
+{
+ uint32_t type;
+ uint8_t length, mpoa_device_type, number_of_mps_macs;
+ uint8_t *end_of_tlvs;
+ struct mpoa_client *mpc;
+
+ mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */
+ dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name);
+ dprintk("total length of all TLVs %d\n", sizeoftlvs);
+ mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */
+ if (mpc == NULL) {
+ printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name);
+ return;
+ }
+ end_of_tlvs = tlvs + sizeoftlvs;
+ while (end_of_tlvs - tlvs >= 5) {
+ type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3];
+ length = tlvs[4];
+ tlvs += 5;
+ dprintk(" type 0x%x length %02x\n", type, length);
+ if (tlvs + length > end_of_tlvs) {
+ printk("TLV value extends past its buffer, aborting parse\n");
+ return;
+ }
+
+ if (type == 0) {
+ printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name);
+ return;
+ }
+
+ if (type != TLV_MPOA_DEVICE_TYPE) {
+ tlvs += length;
+ continue; /* skip other TLVs */
+ }
+ mpoa_device_type = *tlvs++;
+ number_of_mps_macs = *tlvs++;
+ dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type));
+ if (mpoa_device_type == MPS_AND_MPC &&
+ length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */
+ printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
+ dev->name);
+ continue;
+ }
+ if ((mpoa_device_type == MPS || mpoa_device_type == MPC)
+ && length < 22 + number_of_mps_macs*ETH_ALEN) {
+ printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n",
+ dev->name);
+ continue;
+ }
+ if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) {
+ dprintk("ignoring non-MPS device\n");
+ if (mpoa_device_type == MPC) tlvs += 20;
+ continue; /* we are only interested in MPSs */
+ }
+ if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) {
+ printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name);
+ continue; /* someone should read the spec */
+ }
+ dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs);
+
+ /* ok, now we can go and tell our daemon the control address of MPS */
+ send_set_mps_ctrl_addr(tlvs, mpc);
+
+ tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type);
+ if (tlvs == NULL) return;
+ }
+ if (end_of_tlvs - tlvs != 0)
+ printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n",
+ dev->name, end_of_tlvs - tlvs);
+ return;
+}
+
+/*
+ * Store at least advertizing router's MAC address
+ * plus the possible MAC address(es) to mpc->mps_macs.
+ * For a freshly allocated MPOA client mpc->mps_macs == 0.
+ */
+static uint8_t *copy_macs(struct mpoa_client *mpc, uint8_t *router_mac,
+ uint8_t *tlvs, uint8_t mps_macs, uint8_t device_type)
+{
+ int num_macs;
+ num_macs = (mps_macs > 1) ? mps_macs : 1;
+
+ if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */
+ if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs);
+ mpc->number_of_mps_macs = 0;
+ mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL);
+ if (mpc->mps_macs == NULL) {
+ printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name);
+ return NULL;
+ }
+ }
+ memcpy(mpc->mps_macs, router_mac, ETH_ALEN);
+ tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20;
+ if (mps_macs > 0)
+ memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN);
+ tlvs += mps_macs*ETH_ALEN;
+ mpc->number_of_mps_macs = num_macs;
+
+ return tlvs;
+}
+
+static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc)
+{
+ in_cache_entry *entry;
+ struct iphdr *iph;
+ char *buff;
+ uint32_t ipaddr = 0;
+
+ static struct {
+ struct llc_snap_hdr hdr;
+ uint32_t tag;
+ } tagged_llc_snap_hdr = {
+ {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}},
+ 0
+ };
+
+ buff = skb->data + mpc->dev->hard_header_len;
+ iph = (struct iphdr *)buff;
+ ipaddr = iph->daddr;
+
+ ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr);
+
+ entry = mpc->in_ops->get(ipaddr, mpc);
+ if (entry == NULL) {
+ entry = mpc->in_ops->add_entry(ipaddr, mpc);
+ if (entry != NULL) mpc->in_ops->put(entry);
+ return 1;
+ }
+ if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */
+ ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name);
+ mpc->in_ops->put(entry);
+ return 1;
+ }
+
+ ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name);
+ /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */
+ if (iph->ttl <= 1) {
+ ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl);
+ mpc->in_ops->put(entry);
+ return 1;
+ }
+ iph->ttl--;
+ iph->check = 0;
+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
+
+ if (entry->ctrl_info.tag != 0) {
+ ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag);
+ tagged_llc_snap_hdr.tag = entry->ctrl_info.tag;
+ skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
+ skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */
+ memcpy(skb->data, &tagged_llc_snap_hdr, sizeof(tagged_llc_snap_hdr));
+ } else {
+ skb_pull(skb, ETH_HLEN); /* get rid of Eth header */
+ skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */
+ memcpy(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr));
+ }
+
+ atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc);
+ ATM_SKB(skb)->atm_options = entry->shortcut->atm_options;
+ entry->shortcut->send(entry->shortcut, skb);
+ entry->packets_fwded++;
+ mpc->in_ops->put(entry);
+
+ return 0;
+}
+
+/*
+ * Probably needs some error checks and locking, not sure...
+ */
+static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev)
+{
+ int retval;
+ struct mpoa_client *mpc;
+ struct ethhdr *eth;
+ int i = 0;
+
+ mpc = find_mpc_by_lec(dev); /* this should NEVER fail */
+ if(mpc == NULL) {
+ printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name);
+ goto non_ip;
+ }
+
+ eth = (struct ethhdr *)skb->data;
+ if (eth->h_proto != htons(ETH_P_IP))
+ goto non_ip; /* Multi-Protocol Over ATM :-) */
+
+ while (i < mpc->number_of_mps_macs) {
+ if (memcmp(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN), ETH_ALEN) == 0)
+ if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */
+ return 0; /* success! */
+ i++;
+ }
+
+ non_ip:
+ retval = mpc->old_hard_start_xmit(skb,dev);
+
+ return retval;
+}
+
+static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg)
+{
+ int bytes_left;
+ struct mpoa_client *mpc;
+ struct atmmpc_ioc ioc_data;
+ in_cache_entry *in_entry;
+ uint32_t ipaddr;
+ unsigned char *ip;
+
+ bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc));
+ if (bytes_left != 0) {
+ printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left);
+ return -EFAULT;
+ }
+ ipaddr = ioc_data.ipaddr;
+ if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF)
+ return -EINVAL;
+
+ mpc = find_mpc_by_itfnum(ioc_data.dev_num);
+ if (mpc == NULL)
+ return -EINVAL;
+
+ if (ioc_data.type == MPC_SOCKET_INGRESS) {
+ in_entry = mpc->in_ops->get(ipaddr, mpc);
+ if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) {
+ printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n",
+ mpc->dev->name);
+ if (in_entry != NULL) mpc->in_ops->put(in_entry);
+ return -EINVAL;
+ }
+ ip = (unsigned char*)&in_entry->ctrl_info.in_dst_ip;
+ printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n",
+ mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
+ in_entry->shortcut = vcc;
+ mpc->in_ops->put(in_entry);
+ } else {
+ printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name);
+ }
+
+ vcc->proto_data = mpc->dev;
+ vcc->push = mpc_push;
+
+ return 0;
+}
+
+/*
+ *
+ */
+static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev)
+{
+ struct mpoa_client *mpc;
+ in_cache_entry *in_entry;
+ eg_cache_entry *eg_entry;
+
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL) {
+ printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name);
+ return;
+ }
+
+ dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name);
+ in_entry = mpc->in_ops->get_by_vcc(vcc, mpc);
+ if (in_entry) {
+ unsigned char *ip __attribute__ ((unused)) =
+ (unsigned char *)&in_entry->ctrl_info.in_dst_ip;
+ dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n",
+ mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
+ in_entry->shortcut = NULL;
+ mpc->in_ops->put(in_entry);
+ }
+ eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc);
+ if (eg_entry) {
+ dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name);
+ eg_entry->shortcut = NULL;
+ mpc->eg_ops->put(eg_entry);
+ }
+
+ if (in_entry == NULL && eg_entry == NULL)
+ dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name);
+
+ return;
+}
+
+static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct sk_buff *new_skb;
+ eg_cache_entry *eg;
+ struct mpoa_client *mpc;
+ uint32_t tag;
+ char *tmp;
+
+ ddprintk("mpoa: (%s) mpc_push:\n", dev->name);
+ if (skb == NULL) {
+ dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name);
+ mpc_vcc_close(vcc, dev);
+ return;
+ }
+
+ skb->dev = dev;
+ if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) {
+ struct sock *sk = sk_atm(vcc);
+
+ dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name);
+ /* Pass control packets to daemon */
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+ return;
+ }
+
+ /* data coming over the shortcut */
+ atm_return(vcc, skb->truesize);
+
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL) {
+ printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name);
+ return;
+ }
+
+ if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */
+ ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name);
+
+ } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */
+ printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name);
+ printk(" mpc_push: non-tagged data unsupported, purging\n");
+ dev_kfree_skb_any(skb);
+ return;
+ } else {
+ printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ tmp = skb->data + sizeof(struct llc_snap_hdr);
+ tag = *(uint32_t *)tmp;
+
+ eg = mpc->eg_ops->get_by_tag(tag, mpc);
+ if (eg == NULL) {
+ printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n",
+ dev->name,tag);
+ purge_egress_shortcut(vcc, NULL);
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ /*
+ * See if ingress MPC is using shortcut we opened as a return channel.
+ * This means we have a bi-directional vcc opened by us.
+ */
+ if (eg->shortcut == NULL) {
+ eg->shortcut = vcc;
+ printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name);
+ }
+
+ skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */
+ new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */
+ dev_kfree_skb_any(skb);
+ if (new_skb == NULL){
+ mpc->eg_ops->put(eg);
+ return;
+ }
+ skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */
+ memcpy(new_skb->data, eg->ctrl_info.DLL_header, eg->ctrl_info.DH_length);
+ new_skb->protocol = eth_type_trans(new_skb, dev);
+ new_skb->nh.raw = new_skb->data;
+
+ eg->latest_ip_addr = new_skb->nh.iph->saddr;
+ eg->packets_rcvd++;
+ mpc->eg_ops->put(eg);
+
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(new_skb);
+
+ return;
+}
+
+static struct atmdev_ops mpc_ops = { /* only send is required */
+ .close = mpoad_close,
+ .send = msg_from_mpoad
+};
+
+static struct atm_dev mpc_dev = {
+ .ops = &mpc_ops,
+ .type = "mpc",
+ .number = 42,
+ .lock = SPIN_LOCK_UNLOCKED
+ /* members not explicitly initialised will be 0 */
+};
+
+static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg)
+{
+ struct mpoa_client *mpc;
+ struct lec_priv *priv;
+ int err;
+
+ if (mpcs == NULL) {
+ init_timer(&mpc_timer);
+ mpc_timer_refresh();
+
+ /* This lets us now how our LECs are doing */
+ err = register_netdevice_notifier(&mpoa_notifier);
+ if (err < 0) {
+ del_timer(&mpc_timer);
+ return err;
+ }
+ }
+
+ mpc = find_mpc_by_itfnum(arg);
+ if (mpc == NULL) {
+ dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg);
+ mpc = alloc_mpc();
+ if (mpc == NULL)
+ return -ENOMEM;
+ mpc->dev_num = arg;
+ mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */
+ }
+ if (mpc->mpoad_vcc) {
+ printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg);
+ return -EADDRINUSE;
+ }
+
+ if (mpc->dev) { /* check if the lec is LANE2 capable */
+ priv = (struct lec_priv *)mpc->dev->priv;
+ if (priv->lane_version < 2) {
+ dev_put(mpc->dev);
+ mpc->dev = NULL;
+ } else
+ priv->lane2_ops->associate_indicator = lane2_assoc_ind;
+ }
+
+ mpc->mpoad_vcc = vcc;
+ vcc->dev = &mpc_dev;
+ vcc_insert_socket(sk_atm(vcc));
+ set_bit(ATM_VF_META,&vcc->flags);
+ set_bit(ATM_VF_READY,&vcc->flags);
+
+ if (mpc->dev) {
+ char empty[ATM_ESA_LEN];
+ memset(empty, 0, ATM_ESA_LEN);
+
+ start_mpc(mpc, mpc->dev);
+ /* set address if mpcd e.g. gets killed and restarted.
+ * If we do not do it now we have to wait for the next LE_ARP
+ */
+ if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 )
+ send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc);
+ }
+
+ __module_get(THIS_MODULE);
+ return arg;
+}
+
+static void send_set_mps_ctrl_addr(char *addr, struct mpoa_client *mpc)
+{
+ struct k_message mesg;
+
+ memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN);
+
+ mesg.type = SET_MPS_CTRL_ADDR;
+ memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN);
+ msg_to_mpoad(&mesg, mpc);
+
+ return;
+}
+
+static void mpoad_close(struct atm_vcc *vcc)
+{
+ struct mpoa_client *mpc;
+ struct sk_buff *skb;
+
+ mpc = find_mpc_by_vcc(vcc);
+ if (mpc == NULL) {
+ printk("mpoa: mpoad_close: did not find MPC\n");
+ return;
+ }
+ if (!mpc->mpoad_vcc) {
+ printk("mpoa: mpoad_close: close for non-present mpoad\n");
+ return;
+ }
+
+ mpc->mpoad_vcc = NULL;
+ if (mpc->dev) {
+ struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv;
+ priv->lane2_ops->associate_indicator = NULL;
+ stop_mpc(mpc);
+ dev_put(mpc->dev);
+ }
+
+ mpc->in_ops->destroy_cache(mpc);
+ mpc->eg_ops->destroy_cache(mpc);
+
+ while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) {
+ atm_return(vcc, skb->truesize);
+ kfree_skb(skb);
+ }
+
+ printk("mpoa: (%s) going down\n",
+ (mpc->dev) ? mpc->dev->name : "<unknown>");
+ module_put(THIS_MODULE);
+
+ return;
+}
+
+/*
+ *
+ */
+static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+
+ struct mpoa_client *mpc = find_mpc_by_vcc(vcc);
+ struct k_message *mesg = (struct k_message*)skb->data;
+ atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+
+ if (mpc == NULL) {
+ printk("mpoa: msg_from_mpoad: no mpc found\n");
+ return 0;
+ }
+ dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : "<unknown>");
+ switch(mesg->type) {
+ case MPOA_RES_REPLY_RCVD:
+ dprintk(" mpoa_res_reply_rcvd\n");
+ MPOA_res_reply_rcvd(mesg, mpc);
+ break;
+ case MPOA_TRIGGER_RCVD:
+ dprintk(" mpoa_trigger_rcvd\n");
+ MPOA_trigger_rcvd(mesg, mpc);
+ break;
+ case INGRESS_PURGE_RCVD:
+ dprintk(" nhrp_purge_rcvd\n");
+ ingress_purge_rcvd(mesg, mpc);
+ break;
+ case EGRESS_PURGE_RCVD:
+ dprintk(" egress_purge_reply_rcvd\n");
+ egress_purge_rcvd(mesg, mpc);
+ break;
+ case MPS_DEATH:
+ dprintk(" mps_death\n");
+ mps_death(mesg, mpc);
+ break;
+ case CACHE_IMPOS_RCVD:
+ dprintk(" cache_impos_rcvd\n");
+ MPOA_cache_impos_rcvd(mesg, mpc);
+ break;
+ case SET_MPC_CTRL_ADDR:
+ dprintk(" set_mpc_ctrl_addr\n");
+ set_mpc_ctrl_addr_rcvd(mesg, mpc);
+ break;
+ case SET_MPS_MAC_ADDR:
+ dprintk(" set_mps_mac_addr\n");
+ set_mps_mac_addr_rcvd(mesg, mpc);
+ break;
+ case CLEAN_UP_AND_EXIT:
+ dprintk(" clean_up_and_exit\n");
+ clean_up(mesg, mpc, DIE);
+ break;
+ case RELOAD:
+ dprintk(" reload\n");
+ clean_up(mesg, mpc, RELOAD);
+ break;
+ case SET_MPC_PARAMS:
+ dprintk(" set_mpc_params\n");
+ mpc->parameters = mesg->content.params;
+ break;
+ default:
+ dprintk(" unknown message %d\n", mesg->type);
+ break;
+ }
+ kfree_skb(skb);
+
+ return 0;
+}
+
+/* Remember that this function may not do things that sleep */
+int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc)
+{
+ struct sk_buff *skb;
+ struct sock *sk;
+
+ if (mpc == NULL || !mpc->mpoad_vcc) {
+ printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type);
+ return -ENXIO;
+ }
+
+ skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
+ if (skb == NULL)
+ return -ENOMEM;
+ skb_put(skb, sizeof(struct k_message));
+ memcpy(skb->data, mesg, sizeof(struct k_message));
+ atm_force_charge(mpc->mpoad_vcc, skb->truesize);
+
+ sk = sk_atm(mpc->mpoad_vcc);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+
+ return 0;
+}
+
+static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr)
+{
+ struct net_device *dev;
+ struct mpoa_client *mpc;
+ struct lec_priv *priv;
+
+ dev = (struct net_device *)dev_ptr;
+ if (dev->name == NULL || strncmp(dev->name, "lec", 3))
+ return NOTIFY_DONE; /* we are only interested in lec:s */
+
+ switch (event) {
+ case NETDEV_REGISTER: /* a new lec device was allocated */
+ priv = (struct lec_priv *)dev->priv;
+ if (priv->lane_version < 2)
+ break;
+ priv->lane2_ops->associate_indicator = lane2_assoc_ind;
+ mpc = find_mpc_by_itfnum(priv->itfnum);
+ if (mpc == NULL) {
+ dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n",
+ dev->name);
+ mpc = alloc_mpc();
+ if (mpc == NULL) {
+ printk("mpoa: mpoa_event_listener: no new mpc");
+ break;
+ }
+ }
+ mpc->dev_num = priv->itfnum;
+ mpc->dev = dev;
+ dev_hold(dev);
+ dprintk("mpoa: (%s) was initialized\n", dev->name);
+ break;
+ case NETDEV_UNREGISTER:
+ /* the lec device was deallocated */
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL)
+ break;
+ dprintk("mpoa: device (%s) was deallocated\n", dev->name);
+ stop_mpc(mpc);
+ dev_put(mpc->dev);
+ mpc->dev = NULL;
+ break;
+ case NETDEV_UP:
+ /* the dev was ifconfig'ed up */
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL)
+ break;
+ if (mpc->mpoad_vcc != NULL) {
+ start_mpc(mpc, dev);
+ }
+ break;
+ case NETDEV_DOWN:
+ /* the dev was ifconfig'ed down */
+ /* this means that the flow of packets from the
+ * upper layer stops
+ */
+ mpc = find_mpc_by_lec(dev);
+ if (mpc == NULL)
+ break;
+ if (mpc->mpoad_vcc != NULL) {
+ stop_mpc(mpc);
+ }
+ break;
+ case NETDEV_REBOOT:
+ case NETDEV_CHANGE:
+ case NETDEV_CHANGEMTU:
+ case NETDEV_CHANGEADDR:
+ case NETDEV_GOING_DOWN:
+ break;
+ default:
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+/*
+ * Functions which are called after a message is received from mpcd.
+ * Msg is reused on purpose.
+ */
+
+
+static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ uint32_t dst_ip = msg->content.in_info.in_dst_ip;
+ in_cache_entry *entry;
+
+ entry = mpc->in_ops->get(dst_ip, mpc);
+ if(entry == NULL){
+ entry = mpc->in_ops->add_entry(dst_ip, mpc);
+ entry->entry_state = INGRESS_RESOLVING;
+ msg->type = SND_MPOA_RES_RQST;
+ msg->content.in_info = entry->ctrl_info;
+ msg_to_mpoad(msg, mpc);
+ do_gettimeofday(&(entry->reply_wait));
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ if(entry->entry_state == INGRESS_INVALID){
+ entry->entry_state = INGRESS_RESOLVING;
+ msg->type = SND_MPOA_RES_RQST;
+ msg->content.in_info = entry->ctrl_info;
+ msg_to_mpoad(msg, mpc);
+ do_gettimeofday(&(entry->reply_wait));
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n",
+ (mpc->dev) ? mpc->dev->name : "<unknown>");
+ mpc->in_ops->put(entry);
+ return;
+}
+
+/*
+ * Things get complicated because we have to check if there's an egress
+ * shortcut with suitable traffic parameters we could use.
+ */
+static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry)
+{
+ uint32_t dst_ip = msg->content.in_info.in_dst_ip;
+ unsigned char *ip __attribute__ ((unused)) = (unsigned char *)&dst_ip;
+ struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip);
+ eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client);
+
+ if(eg_entry && eg_entry->shortcut){
+ if(eg_entry->shortcut->qos.txtp.traffic_class &
+ msg->qos.txtp.traffic_class &
+ (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){
+ if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR)
+ entry->shortcut = eg_entry->shortcut;
+ else if(eg_entry->shortcut->qos.txtp.max_pcr > 0)
+ entry->shortcut = eg_entry->shortcut;
+ }
+ if(entry->shortcut){
+ dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(ip));
+ client->eg_ops->put(eg_entry);
+ return;
+ }
+ }
+ if (eg_entry != NULL)
+ client->eg_ops->put(eg_entry);
+
+ /* No luck in the egress cache we must open an ingress SVC */
+ msg->type = OPEN_INGRESS_SVC;
+ if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class))
+ {
+ msg->qos = qos->qos;
+ printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name);
+ }
+ else memset(&msg->qos,0,sizeof(struct atm_qos));
+ msg_to_mpoad(msg, client);
+ return;
+}
+
+static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ unsigned char *ip;
+
+ uint32_t dst_ip = msg->content.in_info.in_dst_ip;
+ in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc);
+ ip = (unsigned char *)&dst_ip;
+ dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(ip));
+ ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry);
+ if(entry == NULL){
+ printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name);
+ return;
+ }
+ ddprintk(" entry_state = %d ", entry->entry_state);
+
+ if (entry->entry_state == INGRESS_RESOLVED) {
+ printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name);
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ entry->ctrl_info = msg->content.in_info;
+ do_gettimeofday(&(entry->tv));
+ do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */
+ entry->refresh_time = 0;
+ ddprintk("entry->shortcut = %p\n", entry->shortcut);
+
+ if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){
+ entry->entry_state = INGRESS_RESOLVED;
+ mpc->in_ops->put(entry);
+ return; /* Shortcut already open... */
+ }
+
+ if (entry->shortcut != NULL) {
+ printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n",
+ mpc->dev->name);
+ mpc->in_ops->put(entry);
+ return;
+ }
+
+ check_qos_and_open_shortcut(msg, mpc, entry);
+ entry->entry_state = INGRESS_RESOLVED;
+ mpc->in_ops->put(entry);
+
+ return;
+
+}
+
+static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ uint32_t dst_ip = msg->content.in_info.in_dst_ip;
+ uint32_t mask = msg->ip_mask;
+ unsigned char *ip = (unsigned char *)&dst_ip;
+ in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
+
+ if(entry == NULL){
+ printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name);
+ printk("ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]);
+ return;
+ }
+
+ do {
+ dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" ,
+ mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
+ write_lock_bh(&mpc->ingress_lock);
+ mpc->in_ops->remove_entry(entry, mpc);
+ write_unlock_bh(&mpc->ingress_lock);
+ mpc->in_ops->put(entry);
+ entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask);
+ } while (entry != NULL);
+
+ return;
+}
+
+static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc)
+{
+ uint32_t cache_id = msg->content.eg_info.cache_id;
+ eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc);
+
+ if (entry == NULL) {
+ dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name);
+ return;
+ }
+
+ write_lock_irq(&mpc->egress_lock);
+ mpc->eg_ops->remove_entry(entry, mpc);
+ write_unlock_irq(&mpc->egress_lock);
+
+ mpc->eg_ops->put(entry);
+
+ return;
+}
+
+static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry)
+{
+ struct sock *sk;
+ struct k_message *purge_msg;
+ struct sk_buff *skb;
+
+ dprintk("mpoa: purge_egress_shortcut: entering\n");
+ if (vcc == NULL) {
+ printk("mpoa: purge_egress_shortcut: vcc == NULL\n");
+ return;
+ }
+
+ skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC);
+ if (skb == NULL) {
+ printk("mpoa: purge_egress_shortcut: out of memory\n");
+ return;
+ }
+
+ skb_put(skb, sizeof(struct k_message));
+ memset(skb->data, 0, sizeof(struct k_message));
+ purge_msg = (struct k_message *)skb->data;
+ purge_msg->type = DATA_PLANE_PURGE;
+ if (entry != NULL)
+ purge_msg->content.eg_info = entry->ctrl_info;
+
+ atm_force_charge(vcc, skb->truesize);
+
+ sk = sk_atm(vcc);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+ dprintk("mpoa: purge_egress_shortcut: exiting:\n");
+
+ return;
+}
+
+/*
+ * Our MPS died. Tell our daemon to send NHRP data plane purge to each
+ * of the egress shortcuts we have.
+ */
+static void mps_death( struct k_message * msg, struct mpoa_client * mpc )
+{
+ eg_cache_entry *entry;
+
+ dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name);
+
+ if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){
+ printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name);
+ return;
+ }
+
+ /* FIXME: This knows too much of the cache structure */
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while (entry != NULL) {
+ purge_egress_shortcut(entry->shortcut, entry);
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ mpc->in_ops->destroy_cache(mpc);
+ mpc->eg_ops->destroy_cache(mpc);
+
+ return;
+}
+
+static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc)
+{
+ uint16_t holding_time;
+ eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc);
+
+ holding_time = msg->content.eg_info.holding_time;
+ dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n",
+ mpc->dev->name, entry, holding_time);
+ if(entry == NULL && holding_time) {
+ entry = mpc->eg_ops->add_entry(msg, mpc);
+ mpc->eg_ops->put(entry);
+ return;
+ }
+ if(holding_time){
+ mpc->eg_ops->update(entry, holding_time);
+ return;
+ }
+
+ write_lock_irq(&mpc->egress_lock);
+ mpc->eg_ops->remove_entry(entry, mpc);
+ write_unlock_irq(&mpc->egress_lock);
+
+ mpc->eg_ops->put(entry);
+
+ return;
+}
+
+static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc)
+{
+ struct lec_priv *priv;
+ int i, retval ;
+
+ uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN];
+
+ tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */
+ tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */
+ tlv[5] = 0x02; /* MPOA client */
+ tlv[6] = 0x00; /* number of MPS MAC addresses */
+
+ memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */
+ memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN);
+
+ dprintk("mpoa: (%s) setting MPC ctrl ATM address to ",
+ (mpc->dev) ? mpc->dev->name : "<unknown>");
+ for (i = 7; i < sizeof(tlv); i++)
+ dprintk("%02x ", tlv[i]);
+ dprintk("\n");
+
+ if (mpc->dev) {
+ priv = (struct lec_priv *)mpc->dev->priv;
+ retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv));
+ if (retval == 0)
+ printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name);
+ retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL);
+ if (retval < 0)
+ printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name);
+ }
+
+ return;
+}
+
+static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client)
+{
+
+ if(client->number_of_mps_macs)
+ kfree(client->mps_macs);
+ client->number_of_mps_macs = 0;
+ client->mps_macs = kmalloc(ETH_ALEN,GFP_KERNEL);
+ if (client->mps_macs == NULL) {
+ printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n");
+ return;
+ }
+ client->number_of_mps_macs = 1;
+ memcpy(client->mps_macs, msg->MPS_ctrl, ETH_ALEN);
+
+ return;
+}
+
+/*
+ * purge egress cache and tell daemon to 'action' (DIE, RELOAD)
+ */
+static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action)
+{
+
+ eg_cache_entry *entry;
+ msg->type = SND_EGRESS_PURGE;
+
+
+ /* FIXME: This knows too much of the cache structure */
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while (entry != NULL){
+ msg->content.eg_info = entry->ctrl_info;
+ dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id);
+ msg_to_mpoad(msg, mpc);
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ msg->type = action;
+ msg_to_mpoad(msg, mpc);
+ return;
+}
+
+static void mpc_timer_refresh(void)
+{
+ mpc_timer.expires = jiffies + (MPC_P2 * HZ);
+ mpc_timer.data = mpc_timer.expires;
+ mpc_timer.function = mpc_cache_check;
+ add_timer(&mpc_timer);
+
+ return;
+}
+
+static void mpc_cache_check( unsigned long checking_time )
+{
+ struct mpoa_client *mpc = mpcs;
+ static unsigned long previous_resolving_check_time;
+ static unsigned long previous_refresh_time;
+
+ while( mpc != NULL ){
+ mpc->in_ops->clear_count(mpc);
+ mpc->eg_ops->clear_expired(mpc);
+ if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){
+ mpc->in_ops->check_resolving(mpc);
+ previous_resolving_check_time = checking_time;
+ }
+ if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){
+ mpc->in_ops->refresh(mpc);
+ previous_refresh_time = checking_time;
+ }
+ mpc = mpc->next;
+ }
+ mpc_timer_refresh();
+
+ return;
+}
+
+static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ int err = 0;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA)
+ return -ENOIOCTLCMD;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ switch (cmd) {
+ case ATMMPC_CTRL:
+ err = atm_mpoa_mpoad_attach(vcc, (int)arg);
+ if (err >= 0)
+ sock->state = SS_CONNECTED;
+ break;
+ case ATMMPC_DATA:
+ err = atm_mpoa_vcc_attach(vcc, (void __user *)arg);
+ break;
+ default:
+ break;
+ }
+ return err;
+}
+
+
+static struct atm_ioctl atm_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = atm_mpoa_ioctl,
+};
+
+static __init int atm_mpoa_init(void)
+{
+ register_atm_ioctl(&atm_ioctl_ops);
+
+#ifdef CONFIG_PROC_FS
+ if (mpc_proc_init() != 0)
+ printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n");
+ else
+ printk(KERN_INFO "mpoa: /proc/mpoa initialized\n");
+#endif
+
+ printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n");
+
+ return 0;
+}
+
+static void __exit atm_mpoa_cleanup(void)
+{
+ struct mpoa_client *mpc, *tmp;
+ struct atm_mpoa_qos *qos, *nextqos;
+ struct lec_priv *priv;
+
+#ifdef CONFIG_PROC_FS
+ mpc_proc_clean();
+#endif
+
+ del_timer(&mpc_timer);
+ unregister_netdevice_notifier(&mpoa_notifier);
+ deregister_atm_ioctl(&atm_ioctl_ops);
+
+ mpc = mpcs;
+ mpcs = NULL;
+ while (mpc != NULL) {
+ tmp = mpc->next;
+ if (mpc->dev != NULL) {
+ stop_mpc(mpc);
+ priv = (struct lec_priv *)mpc->dev->priv;
+ if (priv->lane2_ops != NULL)
+ priv->lane2_ops->associate_indicator = NULL;
+ }
+ ddprintk("mpoa: cleanup_module: about to clear caches\n");
+ mpc->in_ops->destroy_cache(mpc);
+ mpc->eg_ops->destroy_cache(mpc);
+ ddprintk("mpoa: cleanup_module: caches cleared\n");
+ kfree(mpc->mps_macs);
+ memset(mpc, 0, sizeof(struct mpoa_client));
+ ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc);
+ kfree(mpc);
+ ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp);
+ mpc = tmp;
+ }
+
+ qos = qos_head;
+ qos_head = NULL;
+ while (qos != NULL) {
+ nextqos = qos->next;
+ dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos);
+ kfree(qos);
+ qos = nextqos;
+ }
+
+ return;
+}
+
+module_init(atm_mpoa_init);
+module_exit(atm_mpoa_cleanup);
+
+MODULE_LICENSE("GPL");
diff --git a/net/atm/mpc.h b/net/atm/mpc.h
new file mode 100644
index 00000000000..863ddf6079e
--- /dev/null
+++ b/net/atm/mpc.h
@@ -0,0 +1,53 @@
+#ifndef _MPC_H_
+#define _MPC_H_
+
+#include <linux/types.h>
+#include <linux/atm.h>
+#include <linux/atmmpc.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include "mpoa_caches.h"
+
+/* kernel -> mpc-daemon */
+int msg_to_mpoad(struct k_message *msg, struct mpoa_client *mpc);
+
+struct mpoa_client {
+ struct mpoa_client *next;
+ struct net_device *dev; /* lec in question */
+ int dev_num; /* e.g. 2 for lec2 */
+ int (*old_hard_start_xmit)(struct sk_buff *skb, struct net_device *dev);
+ struct atm_vcc *mpoad_vcc; /* control channel to mpoad */
+ uint8_t mps_ctrl_addr[ATM_ESA_LEN]; /* MPS control ATM address */
+ uint8_t our_ctrl_addr[ATM_ESA_LEN]; /* MPC's control ATM address */
+
+ rwlock_t ingress_lock;
+ struct in_cache_ops *in_ops; /* ingress cache operations */
+ in_cache_entry *in_cache; /* the ingress cache of this MPC */
+
+ rwlock_t egress_lock;
+ struct eg_cache_ops *eg_ops; /* egress cache operations */
+ eg_cache_entry *eg_cache; /* the egress cache of this MPC */
+
+ uint8_t *mps_macs; /* array of MPS MAC addresses, >=1 */
+ int number_of_mps_macs; /* number of the above MAC addresses */
+ struct mpc_parameters parameters; /* parameters for this client */
+};
+
+
+struct atm_mpoa_qos {
+ struct atm_mpoa_qos *next;
+ uint32_t ipaddr;
+ struct atm_qos qos;
+};
+
+
+/* MPOA QoS operations */
+struct atm_mpoa_qos *atm_mpoa_add_qos(uint32_t dst_ip, struct atm_qos *qos);
+struct atm_mpoa_qos *atm_mpoa_search_qos(uint32_t dst_ip);
+int atm_mpoa_delete_qos(struct atm_mpoa_qos *qos);
+
+/* Display QoS entries. This is for the procfs */
+struct seq_file;
+void atm_mpoa_disp_qos(struct seq_file *m);
+
+#endif /* _MPC_H_ */
diff --git a/net/atm/mpoa_caches.c b/net/atm/mpoa_caches.c
new file mode 100644
index 00000000000..64ddebb6406
--- /dev/null
+++ b/net/atm/mpoa_caches.c
@@ -0,0 +1,576 @@
+#include <linux/types.h>
+#include <linux/atmmpc.h>
+#include <linux/time.h>
+
+#include "mpoa_caches.h"
+#include "mpc.h"
+
+/*
+ * mpoa_caches.c: Implementation of ingress and egress cache
+ * handling functions
+ */
+
+#if 0
+#define dprintk printk /* debug */
+#else
+#define dprintk(format,args...)
+#endif
+
+#if 0
+#define ddprintk printk /* more debug */
+#else
+#define ddprintk(format,args...)
+#endif
+
+static in_cache_entry *in_cache_get(uint32_t dst_ip,
+ struct mpoa_client *client)
+{
+ in_cache_entry *entry;
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while(entry != NULL){
+ if( entry->ctrl_info.in_dst_ip == dst_ip ){
+ atomic_inc(&entry->use);
+ read_unlock_bh(&client->ingress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+
+ return NULL;
+}
+
+static in_cache_entry *in_cache_get_with_mask(uint32_t dst_ip,
+ struct mpoa_client *client,
+ uint32_t mask)
+{
+ in_cache_entry *entry;
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while(entry != NULL){
+ if((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask )){
+ atomic_inc(&entry->use);
+ read_unlock_bh(&client->ingress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+
+ return NULL;
+
+}
+
+static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc,
+ struct mpoa_client *client )
+{
+ in_cache_entry *entry;
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while(entry != NULL){
+ if(entry->shortcut == vcc) {
+ atomic_inc(&entry->use);
+ read_unlock_bh(&client->ingress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+
+ return NULL;
+}
+
+static in_cache_entry *in_cache_add_entry(uint32_t dst_ip,
+ struct mpoa_client *client)
+{
+ unsigned char *ip __attribute__ ((unused)) = (unsigned char *)&dst_ip;
+ in_cache_entry* entry = kmalloc(sizeof(in_cache_entry), GFP_KERNEL);
+
+ if (entry == NULL) {
+ printk("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n");
+ return NULL;
+ }
+
+ dprintk("mpoa: mpoa_caches.c: adding an ingress entry, ip = %u.%u.%u.%u\n", ip[0], ip[1], ip[2], ip[3]);
+ memset(entry,0,sizeof(in_cache_entry));
+
+ atomic_set(&entry->use, 1);
+ dprintk("mpoa: mpoa_caches.c: new_in_cache_entry: about to lock\n");
+ write_lock_bh(&client->ingress_lock);
+ entry->next = client->in_cache;
+ entry->prev = NULL;
+ if (client->in_cache != NULL)
+ client->in_cache->prev = entry;
+ client->in_cache = entry;
+
+ memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
+ entry->ctrl_info.in_dst_ip = dst_ip;
+ do_gettimeofday(&(entry->tv));
+ entry->retry_time = client->parameters.mpc_p4;
+ entry->count = 1;
+ entry->entry_state = INGRESS_INVALID;
+ entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT;
+ atomic_inc(&entry->use);
+
+ write_unlock_bh(&client->ingress_lock);
+ dprintk("mpoa: mpoa_caches.c: new_in_cache_entry: unlocked\n");
+
+ return entry;
+}
+
+static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc)
+{
+ struct atm_mpoa_qos *qos;
+ struct k_message msg;
+
+ entry->count++;
+ if(entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL)
+ return OPEN;
+
+ if(entry->entry_state == INGRESS_REFRESHING){
+ if(entry->count > mpc->parameters.mpc_p1){
+ msg.type = SND_MPOA_RES_RQST;
+ msg.content.in_info = entry->ctrl_info;
+ memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN);
+ qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
+ if (qos != NULL) msg.qos = qos->qos;
+ msg_to_mpoad(&msg, mpc);
+ do_gettimeofday(&(entry->reply_wait));
+ entry->entry_state = INGRESS_RESOLVING;
+ }
+ if(entry->shortcut != NULL)
+ return OPEN;
+ return CLOSED;
+ }
+
+ if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL)
+ return OPEN;
+
+ if( entry->count > mpc->parameters.mpc_p1 &&
+ entry->entry_state == INGRESS_INVALID){
+ unsigned char *ip __attribute__ ((unused)) =
+ (unsigned char *)&entry->ctrl_info.in_dst_ip;
+
+ dprintk("mpoa: (%s) mpoa_caches.c: threshold exceeded for ip %u.%u.%u.%u, sending MPOA res req\n", mpc->dev->name, ip[0], ip[1], ip[2], ip[3]);
+ entry->entry_state = INGRESS_RESOLVING;
+ msg.type = SND_MPOA_RES_RQST;
+ memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN );
+ msg.content.in_info = entry->ctrl_info;
+ qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
+ if (qos != NULL) msg.qos = qos->qos;
+ msg_to_mpoad( &msg, mpc);
+ do_gettimeofday(&(entry->reply_wait));
+ }
+
+ return CLOSED;
+}
+
+static void in_cache_put(in_cache_entry *entry)
+{
+ if (atomic_dec_and_test(&entry->use)) {
+ memset(entry, 0, sizeof(in_cache_entry));
+ kfree(entry);
+ }
+
+ return;
+}
+
+/*
+ * This should be called with write lock on
+ */
+static void in_cache_remove_entry(in_cache_entry *entry,
+ struct mpoa_client *client)
+{
+ struct atm_vcc *vcc;
+ struct k_message msg;
+ unsigned char *ip;
+
+ vcc = entry->shortcut;
+ ip = (unsigned char *)&entry->ctrl_info.in_dst_ip;
+ dprintk("mpoa: mpoa_caches.c: removing an ingress entry, ip = %u.%u.%u.%u\n",ip[0], ip[1], ip[2], ip[3]);
+
+ if (entry->prev != NULL)
+ entry->prev->next = entry->next;
+ else
+ client->in_cache = entry->next;
+ if (entry->next != NULL)
+ entry->next->prev = entry->prev;
+ client->in_ops->put(entry);
+ if(client->in_cache == NULL && client->eg_cache == NULL){
+ msg.type = STOP_KEEP_ALIVE_SM;
+ msg_to_mpoad(&msg,client);
+ }
+
+ /* Check if the egress side still uses this VCC */
+ if (vcc != NULL) {
+ eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc, client);
+ if (eg_entry != NULL) {
+ client->eg_ops->put(eg_entry);
+ return;
+ }
+ vcc_release_async(vcc, -EPIPE);
+ }
+
+ return;
+}
+
+
+/* Call this every MPC-p2 seconds... Not exactly correct solution,
+ but an easy one... */
+static void clear_count_and_expired(struct mpoa_client *client)
+{
+ unsigned char *ip;
+ in_cache_entry *entry, *next_entry;
+ struct timeval now;
+
+ do_gettimeofday(&now);
+
+ write_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while(entry != NULL){
+ entry->count=0;
+ next_entry = entry->next;
+ if((now.tv_sec - entry->tv.tv_sec)
+ > entry->ctrl_info.holding_time){
+ ip = (unsigned char*)&entry->ctrl_info.in_dst_ip;
+ dprintk("mpoa: mpoa_caches.c: holding time expired, ip = %u.%u.%u.%u\n", NIPQUAD(ip));
+ client->in_ops->remove_entry(entry, client);
+ }
+ entry = next_entry;
+ }
+ write_unlock_bh(&client->ingress_lock);
+
+ return;
+}
+
+/* Call this every MPC-p4 seconds. */
+static void check_resolving_entries(struct mpoa_client *client)
+{
+
+ struct atm_mpoa_qos *qos;
+ in_cache_entry *entry;
+ struct timeval now;
+ struct k_message msg;
+
+ do_gettimeofday( &now );
+
+ read_lock_bh(&client->ingress_lock);
+ entry = client->in_cache;
+ while( entry != NULL ){
+ if(entry->entry_state == INGRESS_RESOLVING){
+ if(now.tv_sec - entry->hold_down.tv_sec < client->parameters.mpc_p6){
+ entry = entry->next; /* Entry in hold down */
+ continue;
+ }
+ if( (now.tv_sec - entry->reply_wait.tv_sec) >
+ entry->retry_time ){
+ entry->retry_time = MPC_C1*( entry->retry_time );
+ if(entry->retry_time > client->parameters.mpc_p5){
+ /* Retry time maximum exceeded, put entry in hold down. */
+ do_gettimeofday(&(entry->hold_down));
+ entry->retry_time = client->parameters.mpc_p4;
+ entry = entry->next;
+ continue;
+ }
+ /* Ask daemon to send a resolution request. */
+ memset(&(entry->hold_down),0,sizeof(struct timeval));
+ msg.type = SND_MPOA_RES_RTRY;
+ memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN);
+ msg.content.in_info = entry->ctrl_info;
+ qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip);
+ if (qos != NULL) msg.qos = qos->qos;
+ msg_to_mpoad(&msg, client);
+ do_gettimeofday(&(entry->reply_wait));
+ }
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+}
+
+/* Call this every MPC-p5 seconds. */
+static void refresh_entries(struct mpoa_client *client)
+{
+ struct timeval now;
+ struct in_cache_entry *entry = client->in_cache;
+
+ ddprintk("mpoa: mpoa_caches.c: refresh_entries\n");
+ do_gettimeofday(&now);
+
+ read_lock_bh(&client->ingress_lock);
+ while( entry != NULL ){
+ if( entry->entry_state == INGRESS_RESOLVED ){
+ if(!(entry->refresh_time))
+ entry->refresh_time = (2*(entry->ctrl_info.holding_time))/3;
+ if( (now.tv_sec - entry->reply_wait.tv_sec) > entry->refresh_time ){
+ dprintk("mpoa: mpoa_caches.c: refreshing an entry.\n");
+ entry->entry_state = INGRESS_REFRESHING;
+
+ }
+ }
+ entry = entry->next;
+ }
+ read_unlock_bh(&client->ingress_lock);
+}
+
+static void in_destroy_cache(struct mpoa_client *mpc)
+{
+ write_lock_irq(&mpc->ingress_lock);
+ while(mpc->in_cache != NULL)
+ mpc->in_ops->remove_entry(mpc->in_cache, mpc);
+ write_unlock_irq(&mpc->ingress_lock);
+
+ return;
+}
+
+static eg_cache_entry *eg_cache_get_by_cache_id(uint32_t cache_id, struct mpoa_client *mpc)
+{
+ eg_cache_entry *entry;
+
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while(entry != NULL){
+ if(entry->ctrl_info.cache_id == cache_id){
+ atomic_inc(&entry->use);
+ read_unlock_irq(&mpc->egress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ return NULL;
+}
+
+/* This can be called from any context since it saves CPU flags */
+static eg_cache_entry *eg_cache_get_by_tag(uint32_t tag, struct mpoa_client *mpc)
+{
+ unsigned long flags;
+ eg_cache_entry *entry;
+
+ read_lock_irqsave(&mpc->egress_lock, flags);
+ entry = mpc->eg_cache;
+ while (entry != NULL){
+ if (entry->ctrl_info.tag == tag) {
+ atomic_inc(&entry->use);
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+
+ return NULL;
+}
+
+/* This can be called from any context since it saves CPU flags */
+static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc, struct mpoa_client *mpc)
+{
+ unsigned long flags;
+ eg_cache_entry *entry;
+
+ read_lock_irqsave(&mpc->egress_lock, flags);
+ entry = mpc->eg_cache;
+ while (entry != NULL){
+ if (entry->shortcut == vcc) {
+ atomic_inc(&entry->use);
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irqrestore(&mpc->egress_lock, flags);
+
+ return NULL;
+}
+
+static eg_cache_entry *eg_cache_get_by_src_ip(uint32_t ipaddr, struct mpoa_client *mpc)
+{
+ eg_cache_entry *entry;
+
+ read_lock_irq(&mpc->egress_lock);
+ entry = mpc->eg_cache;
+ while(entry != NULL){
+ if(entry->latest_ip_addr == ipaddr) {
+ atomic_inc(&entry->use);
+ read_unlock_irq(&mpc->egress_lock);
+ return entry;
+ }
+ entry = entry->next;
+ }
+ read_unlock_irq(&mpc->egress_lock);
+
+ return NULL;
+}
+
+static void eg_cache_put(eg_cache_entry *entry)
+{
+ if (atomic_dec_and_test(&entry->use)) {
+ memset(entry, 0, sizeof(eg_cache_entry));
+ kfree(entry);
+ }
+
+ return;
+}
+
+/*
+ * This should be called with write lock on
+ */
+static void eg_cache_remove_entry(eg_cache_entry *entry,
+ struct mpoa_client *client)
+{
+ struct atm_vcc *vcc;
+ struct k_message msg;
+
+ vcc = entry->shortcut;
+ dprintk("mpoa: mpoa_caches.c: removing an egress entry.\n");
+ if (entry->prev != NULL)
+ entry->prev->next = entry->next;
+ else
+ client->eg_cache = entry->next;
+ if (entry->next != NULL)
+ entry->next->prev = entry->prev;
+ client->eg_ops->put(entry);
+ if(client->in_cache == NULL && client->eg_cache == NULL){
+ msg.type = STOP_KEEP_ALIVE_SM;
+ msg_to_mpoad(&msg,client);
+ }
+
+ /* Check if the ingress side still uses this VCC */
+ if (vcc != NULL) {
+ in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client);
+ if (in_entry != NULL) {
+ client->in_ops->put(in_entry);
+ return;
+ }
+ vcc_release_async(vcc, -EPIPE);
+ }
+
+ return;
+}
+
+static eg_cache_entry *eg_cache_add_entry(struct k_message *msg, struct mpoa_client *client)
+{
+ unsigned char *ip;
+ eg_cache_entry *entry = kmalloc(sizeof(eg_cache_entry), GFP_KERNEL);
+
+ if (entry == NULL) {
+ printk("mpoa: mpoa_caches.c: new_eg_cache_entry: out of memory\n");
+ return NULL;
+ }
+
+ ip = (unsigned char *)&msg->content.eg_info.eg_dst_ip;
+ dprintk("mpoa: mpoa_caches.c: adding an egress entry, ip = %u.%u.%u.%u, this should be our IP\n", NIPQUAD(ip));
+ memset(entry, 0, sizeof(eg_cache_entry));
+
+ atomic_set(&entry->use, 1);
+ dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry: about to lock\n");
+ write_lock_irq(&client->egress_lock);
+ entry->next = client->eg_cache;
+ entry->prev = NULL;
+ if (client->eg_cache != NULL)
+ client->eg_cache->prev = entry;
+ client->eg_cache = entry;
+
+ memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN);
+ entry->ctrl_info = msg->content.eg_info;
+ do_gettimeofday(&(entry->tv));
+ entry->entry_state = EGRESS_RESOLVED;
+ dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry cache_id %lu\n", ntohl(entry->ctrl_info.cache_id));
+ ip = (unsigned char *)&entry->ctrl_info.mps_ip;
+ dprintk("mpoa: mpoa_caches.c: mps_ip = %u.%u.%u.%u\n", NIPQUAD(ip));
+ atomic_inc(&entry->use);
+
+ write_unlock_irq(&client->egress_lock);
+ dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry: unlocked\n");
+
+ return entry;
+}
+
+static void update_eg_cache_entry(eg_cache_entry * entry, uint16_t holding_time)
+{
+ do_gettimeofday(&(entry->tv));
+ entry->entry_state = EGRESS_RESOLVED;
+ entry->ctrl_info.holding_time = holding_time;
+
+ return;
+}
+
+static void clear_expired(struct mpoa_client *client)
+{
+ eg_cache_entry *entry, *next_entry;
+ struct timeval now;
+ struct k_message msg;
+
+ do_gettimeofday(&now);
+
+ write_lock_irq(&client->egress_lock);
+ entry = client->eg_cache;
+ while(entry != NULL){
+ next_entry = entry->next;
+ if((now.tv_sec - entry->tv.tv_sec)
+ > entry->ctrl_info.holding_time){
+ msg.type = SND_EGRESS_PURGE;
+ msg.content.eg_info = entry->ctrl_info;
+ dprintk("mpoa: mpoa_caches.c: egress_cache: holding time expired, cache_id = %lu.\n",ntohl(entry->ctrl_info.cache_id));
+ msg_to_mpoad(&msg, client);
+ client->eg_ops->remove_entry(entry, client);
+ }
+ entry = next_entry;
+ }
+ write_unlock_irq(&client->egress_lock);
+
+ return;
+}
+
+static void eg_destroy_cache(struct mpoa_client *mpc)
+{
+ write_lock_irq(&mpc->egress_lock);
+ while(mpc->eg_cache != NULL)
+ mpc->eg_ops->remove_entry(mpc->eg_cache, mpc);
+ write_unlock_irq(&mpc->egress_lock);
+
+ return;
+}
+
+
+
+static struct in_cache_ops ingress_ops = {
+ in_cache_add_entry, /* add_entry */
+ in_cache_get, /* get */
+ in_cache_get_with_mask, /* get_with_mask */
+ in_cache_get_by_vcc, /* get_by_vcc */
+ in_cache_put, /* put */
+ in_cache_remove_entry, /* remove_entry */
+ cache_hit, /* cache_hit */
+ clear_count_and_expired, /* clear_count */
+ check_resolving_entries, /* check_resolving */
+ refresh_entries, /* refresh */
+ in_destroy_cache /* destroy_cache */
+};
+
+static struct eg_cache_ops egress_ops = {
+ eg_cache_add_entry, /* add_entry */
+ eg_cache_get_by_cache_id, /* get_by_cache_id */
+ eg_cache_get_by_tag, /* get_by_tag */
+ eg_cache_get_by_vcc, /* get_by_vcc */
+ eg_cache_get_by_src_ip, /* get_by_src_ip */
+ eg_cache_put, /* put */
+ eg_cache_remove_entry, /* remove_entry */
+ update_eg_cache_entry, /* update */
+ clear_expired, /* clear_expired */
+ eg_destroy_cache /* destroy_cache */
+};
+
+
+void atm_mpoa_init_cache(struct mpoa_client *mpc)
+{
+ mpc->in_ops = &ingress_ops;
+ mpc->eg_ops = &egress_ops;
+
+ return;
+}
diff --git a/net/atm/mpoa_caches.h b/net/atm/mpoa_caches.h
new file mode 100644
index 00000000000..6c9886a03d0
--- /dev/null
+++ b/net/atm/mpoa_caches.h
@@ -0,0 +1,96 @@
+#ifndef MPOA_CACHES_H
+#define MPOA_CACHES_H
+
+#include <linux/netdevice.h>
+#include <linux/types.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmmpc.h>
+
+struct mpoa_client;
+
+void atm_mpoa_init_cache(struct mpoa_client *mpc);
+
+typedef struct in_cache_entry {
+ struct in_cache_entry *next;
+ struct in_cache_entry *prev;
+ struct timeval tv;
+ struct timeval reply_wait;
+ struct timeval hold_down;
+ uint32_t packets_fwded;
+ uint16_t entry_state;
+ uint32_t retry_time;
+ uint32_t refresh_time;
+ uint32_t count;
+ struct atm_vcc *shortcut;
+ uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN];
+ struct in_ctrl_info ctrl_info;
+ atomic_t use;
+} in_cache_entry;
+
+struct in_cache_ops{
+ in_cache_entry *(*add_entry)(uint32_t dst_ip,
+ struct mpoa_client *client);
+ in_cache_entry *(*get)(uint32_t dst_ip, struct mpoa_client *client);
+ in_cache_entry *(*get_with_mask)(uint32_t dst_ip,
+ struct mpoa_client *client,
+ uint32_t mask);
+ in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc,
+ struct mpoa_client *client);
+ void (*put)(in_cache_entry *entry);
+ void (*remove_entry)(in_cache_entry *delEntry,
+ struct mpoa_client *client );
+ int (*cache_hit)(in_cache_entry *entry,
+ struct mpoa_client *client);
+ void (*clear_count)(struct mpoa_client *client);
+ void (*check_resolving)(struct mpoa_client *client);
+ void (*refresh)(struct mpoa_client *client);
+ void (*destroy_cache)(struct mpoa_client *mpc);
+};
+
+typedef struct eg_cache_entry{
+ struct eg_cache_entry *next;
+ struct eg_cache_entry *prev;
+ struct timeval tv;
+ uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN];
+ struct atm_vcc *shortcut;
+ uint32_t packets_rcvd;
+ uint16_t entry_state;
+ uint32_t latest_ip_addr; /* The src IP address of the last packet */
+ struct eg_ctrl_info ctrl_info;
+ atomic_t use;
+} eg_cache_entry;
+
+struct eg_cache_ops{
+ eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_cache_id)(uint32_t cache_id, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_tag)(uint32_t cache_id, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client);
+ eg_cache_entry *(*get_by_src_ip)(uint32_t ipaddr, struct mpoa_client *client);
+ void (*put)(eg_cache_entry *entry);
+ void (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client);
+ void (*update)(eg_cache_entry *entry, uint16_t holding_time);
+ void (*clear_expired)(struct mpoa_client *client);
+ void (*destroy_cache)(struct mpoa_client *mpc);
+};
+
+
+/* Ingress cache entry states */
+
+#define INGRESS_REFRESHING 3
+#define INGRESS_RESOLVED 2
+#define INGRESS_RESOLVING 1
+#define INGRESS_INVALID 0
+
+/* VCC states */
+
+#define OPEN 1
+#define CLOSED 0
+
+/* Egress cache entry states */
+
+#define EGRESS_RESOLVED 2
+#define EGRESS_PURGE 1
+#define EGRESS_INVALID 0
+
+#endif
diff --git a/net/atm/mpoa_proc.c b/net/atm/mpoa_proc.c
new file mode 100644
index 00000000000..60834b5a14d
--- /dev/null
+++ b/net/atm/mpoa_proc.c
@@ -0,0 +1,305 @@
+#include <linux/config.h>
+
+#ifdef CONFIG_PROC_FS
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/time.h>
+#include <linux/seq_file.h>
+#include <asm/uaccess.h>
+#include <linux/atmmpc.h>
+#include <linux/atm.h>
+#include "mpc.h"
+#include "mpoa_caches.h"
+
+/*
+ * mpoa_proc.c: Implementation MPOA client's proc
+ * file system statistics
+ */
+
+#if 1
+#define dprintk printk /* debug */
+#else
+#define dprintk(format,args...)
+#endif
+
+#define STAT_FILE_NAME "mpc" /* Our statistic file's name */
+
+extern struct mpoa_client *mpcs;
+extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */
+
+static int proc_mpc_open(struct inode *inode, struct file *file);
+static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
+ size_t nbytes, loff_t *ppos);
+
+static int parse_qos(const char *buff);
+
+/*
+ * Define allowed FILE OPERATIONS
+ */
+static struct file_operations mpc_file_operations = {
+ .owner = THIS_MODULE,
+ .open = proc_mpc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = proc_mpc_write,
+ .release = seq_release,
+};
+
+/*
+ * Returns the state of an ingress cache entry as a string
+ */
+static const char *ingress_state_string(int state){
+ switch(state) {
+ case INGRESS_RESOLVING:
+ return "resolving ";
+ break;
+ case INGRESS_RESOLVED:
+ return "resolved ";
+ break;
+ case INGRESS_INVALID:
+ return "invalid ";
+ break;
+ case INGRESS_REFRESHING:
+ return "refreshing ";
+ break;
+ default:
+ return "";
+ }
+}
+
+/*
+ * Returns the state of an egress cache entry as a string
+ */
+static const char *egress_state_string(int state){
+ switch(state) {
+ case EGRESS_RESOLVED:
+ return "resolved ";
+ break;
+ case EGRESS_PURGE:
+ return "purge ";
+ break;
+ case EGRESS_INVALID:
+ return "invalid ";
+ break;
+ default:
+ return "";
+ }
+}
+
+/*
+ * FIXME: mpcs (and per-mpc lists) have no locking whatsoever.
+ */
+
+static void *mpc_start(struct seq_file *m, loff_t *pos)
+{
+ loff_t l = *pos;
+ struct mpoa_client *mpc;
+
+ if (!l--)
+ return SEQ_START_TOKEN;
+ for (mpc = mpcs; mpc; mpc = mpc->next)
+ if (!l--)
+ return mpc;
+ return NULL;
+}
+
+static void *mpc_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ struct mpoa_client *p = v;
+ (*pos)++;
+ return v == SEQ_START_TOKEN ? mpcs : p->next;
+}
+
+static void mpc_stop(struct seq_file *m, void *v)
+{
+}
+
+/*
+ * READING function - called when the /proc/atm/mpoa file is read from.
+ */
+static int mpc_show(struct seq_file *m, void *v)
+{
+ struct mpoa_client *mpc = v;
+ unsigned char *temp;
+ int i;
+ in_cache_entry *in_entry;
+ eg_cache_entry *eg_entry;
+ struct timeval now;
+ unsigned char ip_string[16];
+
+ if (v == SEQ_START_TOKEN) {
+ atm_mpoa_disp_qos(m);
+ return 0;
+ }
+
+ seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num);
+ seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n");
+ do_gettimeofday(&now);
+
+ for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) {
+ temp = (unsigned char *)&in_entry->ctrl_info.in_dst_ip;
+ sprintf(ip_string,"%d.%d.%d.%d", temp[0], temp[1], temp[2], temp[3]);
+ seq_printf(m, "%-16s%s%-14lu%-12u",
+ ip_string,
+ ingress_state_string(in_entry->entry_state),
+ in_entry->ctrl_info.holding_time-(now.tv_sec-in_entry->tv.tv_sec),
+ in_entry->packets_fwded);
+ if (in_entry->shortcut)
+ seq_printf(m, " %-3d %-3d",in_entry->shortcut->vpi,in_entry->shortcut->vci);
+ seq_printf(m, "\n");
+ }
+
+ seq_printf(m, "\n");
+ seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n");
+ for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) {
+ unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr;
+ for(i = 0; i < ATM_ESA_LEN; i++)
+ seq_printf(m, "%02x", p[i]);
+ seq_printf(m, "\n%-16lu%s%-14lu%-15u",
+ (unsigned long)ntohl(eg_entry->ctrl_info.cache_id),
+ egress_state_string(eg_entry->entry_state),
+ (eg_entry->ctrl_info.holding_time-(now.tv_sec-eg_entry->tv.tv_sec)),
+ eg_entry->packets_rcvd);
+
+ /* latest IP address */
+ temp = (unsigned char *)&eg_entry->latest_ip_addr;
+ sprintf(ip_string, "%d.%d.%d.%d", temp[0], temp[1], temp[2], temp[3]);
+ seq_printf(m, "%-16s", ip_string);
+
+ if (eg_entry->shortcut)
+ seq_printf(m, " %-3d %-3d",eg_entry->shortcut->vpi,eg_entry->shortcut->vci);
+ seq_printf(m, "\n");
+ }
+ seq_printf(m, "\n");
+ return 0;
+}
+
+static struct seq_operations mpc_op = {
+ .start = mpc_start,
+ .next = mpc_next,
+ .stop = mpc_stop,
+ .show = mpc_show
+};
+
+static int proc_mpc_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &mpc_op);
+}
+
+static ssize_t proc_mpc_write(struct file *file, const char __user *buff,
+ size_t nbytes, loff_t *ppos)
+{
+ char *page, *p;
+ unsigned len;
+
+ if (nbytes == 0)
+ return 0;
+
+ if (nbytes >= PAGE_SIZE)
+ nbytes = PAGE_SIZE-1;
+
+ page = (char *)__get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ for (p = page, len = 0; len < nbytes; p++, len++) {
+ if (get_user(*p, buff++)) {
+ free_page((unsigned long)page);
+ return -EFAULT;
+ }
+ if (*p == '\0' || *p == '\n')
+ break;
+ }
+
+ *p = '\0';
+
+ if (!parse_qos(page))
+ printk("mpoa: proc_mpc_write: could not parse '%s'\n", page);
+
+ free_page((unsigned long)page);
+
+ return len;
+}
+
+static int parse_qos(const char *buff)
+{
+ /* possible lines look like this
+ * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu
+ */
+ unsigned char ip[4];
+ int tx_pcr, tx_sdu, rx_pcr, rx_sdu;
+ uint32_t ipaddr;
+ struct atm_qos qos;
+
+ memset(&qos, 0, sizeof(struct atm_qos));
+
+ if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu",
+ ip, ip+1, ip+2, ip+3) == 4) {
+ ipaddr = *(uint32_t *)ip;
+ return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr));
+ }
+
+ if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx",
+ ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) {
+ rx_pcr = tx_pcr;
+ rx_sdu = tx_sdu;
+ } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d",
+ ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8)
+ return 0;
+
+ ipaddr = *(uint32_t *)ip;
+ qos.txtp.traffic_class = ATM_CBR;
+ qos.txtp.max_pcr = tx_pcr;
+ qos.txtp.max_sdu = tx_sdu;
+ qos.rxtp.traffic_class = ATM_CBR;
+ qos.rxtp.max_pcr = rx_pcr;
+ qos.rxtp.max_sdu = rx_sdu;
+ qos.aal = ATM_AAL5;
+ dprintk("mpoa: mpoa_proc.c: parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n",
+ qos.txtp.max_pcr,
+ qos.txtp.max_sdu,
+ qos.rxtp.max_pcr,
+ qos.rxtp.max_sdu
+ );
+
+ atm_mpoa_add_qos(ipaddr, &qos);
+ return 1;
+}
+
+/*
+ * INITIALIZATION function - called when module is initialized/loaded.
+ */
+int mpc_proc_init(void)
+{
+ struct proc_dir_entry *p;
+
+ p = create_proc_entry(STAT_FILE_NAME, 0, atm_proc_root);
+ if (!p) {
+ printk(KERN_ERR "Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME);
+ return -ENOMEM;
+ }
+ p->proc_fops = &mpc_file_operations;
+ p->owner = THIS_MODULE;
+ return 0;
+}
+
+/*
+ * DELETING function - called when module is removed.
+ */
+void mpc_proc_clean(void)
+{
+ remove_proc_entry(STAT_FILE_NAME,atm_proc_root);
+}
+
+
+#endif /* CONFIG_PROC_FS */
+
+
+
+
+
+
diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c
new file mode 100644
index 00000000000..58f4a2b5aeb
--- /dev/null
+++ b/net/atm/pppoatm.c
@@ -0,0 +1,369 @@
+/* net/atm/pppoatm.c - RFC2364 PPP over ATM/AAL5 */
+
+/* Copyright 1999-2000 by Mitchell Blank Jr */
+/* Based on clip.c; 1995-1999 by Werner Almesberger, EPFL LRC/ICA */
+/* And on ppp_async.c; Copyright 1999 Paul Mackerras */
+/* And help from Jens Axboe */
+
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * This driver provides the encapsulation and framing for sending
+ * and receiving PPP frames in ATM AAL5 PDUs.
+ */
+
+/*
+ * One shortcoming of this driver is that it does not comply with
+ * section 8 of RFC2364 - we are supposed to detect a change
+ * in encapsulation and immediately abort the connection (in order
+ * to avoid a black-hole being created if our peer loses state
+ * and changes encapsulation unilaterally. However, since the
+ * ppp_generic layer actually does the decapsulation, we need
+ * a way of notifying it when we _think_ there might be a problem)
+ * There's two cases:
+ * 1. LLC-encapsulation was missing when it was enabled. In
+ * this case, we should tell the upper layer "tear down
+ * this session if this skb looks ok to you"
+ * 2. LLC-encapsulation was present when it was disabled. Then
+ * we need to tell the upper layer "this packet may be
+ * ok, but if its in error tear down the session"
+ * These hooks are not yet available in ppp_generic
+ */
+
+#include <linux/module.h>
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/ppp_defs.h>
+#include <linux/if_ppp.h>
+#include <linux/ppp_channel.h>
+#include <linux/atmppp.h>
+
+#include "common.h"
+
+#if 0
+#define DPRINTK(format, args...) \
+ printk(KERN_DEBUG "pppoatm: " format, ##args)
+#else
+#define DPRINTK(format, args...)
+#endif
+
+enum pppoatm_encaps {
+ e_autodetect = PPPOATM_ENCAPS_AUTODETECT,
+ e_vc = PPPOATM_ENCAPS_VC,
+ e_llc = PPPOATM_ENCAPS_LLC,
+};
+
+struct pppoatm_vcc {
+ struct atm_vcc *atmvcc; /* VCC descriptor */
+ void (*old_push)(struct atm_vcc *, struct sk_buff *);
+ void (*old_pop)(struct atm_vcc *, struct sk_buff *);
+ /* keep old push/pop for detaching */
+ enum pppoatm_encaps encaps;
+ int flags; /* SC_COMP_PROT - compress protocol */
+ struct ppp_channel chan; /* interface to generic ppp layer */
+ struct tasklet_struct wakeup_tasklet;
+};
+
+/*
+ * Header used for LLC Encapsulated PPP (4 bytes) followed by the LCP protocol
+ * ID (0xC021) used in autodetection
+ */
+static const unsigned char pppllc[6] = { 0xFE, 0xFE, 0x03, 0xCF, 0xC0, 0x21 };
+#define LLC_LEN (4)
+
+static inline struct pppoatm_vcc *atmvcc_to_pvcc(const struct atm_vcc *atmvcc)
+{
+ return (struct pppoatm_vcc *) (atmvcc->user_back);
+}
+
+static inline struct pppoatm_vcc *chan_to_pvcc(const struct ppp_channel *chan)
+{
+ return (struct pppoatm_vcc *) (chan->private);
+}
+
+/*
+ * We can't do this directly from our _pop handler, since the ppp code
+ * doesn't want to be called in interrupt context, so we do it from
+ * a tasklet
+ */
+static void pppoatm_wakeup_sender(unsigned long arg)
+{
+ ppp_output_wakeup((struct ppp_channel *) arg);
+}
+
+/*
+ * This gets called every time the ATM card has finished sending our
+ * skb. The ->old_pop will take care up normal atm flow control,
+ * but we also need to wake up the device if we blocked it
+ */
+static void pppoatm_pop(struct atm_vcc *atmvcc, struct sk_buff *skb)
+{
+ struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
+ pvcc->old_pop(atmvcc, skb);
+ /*
+ * We don't really always want to do this since it's
+ * really inefficient - it would be much better if we could
+ * test if we had actually throttled the generic layer.
+ * Unfortunately then there would be a nasty SMP race where
+ * we could clear that flag just as we refuse another packet.
+ * For now we do the safe thing.
+ */
+ tasklet_schedule(&pvcc->wakeup_tasklet);
+}
+
+/*
+ * Unbind from PPP - currently we only do this when closing the socket,
+ * but we could put this into an ioctl if need be
+ */
+static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc)
+{
+ struct pppoatm_vcc *pvcc;
+ pvcc = atmvcc_to_pvcc(atmvcc);
+ atmvcc->push = pvcc->old_push;
+ atmvcc->pop = pvcc->old_pop;
+ tasklet_kill(&pvcc->wakeup_tasklet);
+ ppp_unregister_channel(&pvcc->chan);
+ atmvcc->user_back = NULL;
+ kfree(pvcc);
+ /* Gee, I hope we have the big kernel lock here... */
+ module_put(THIS_MODULE);
+}
+
+/* Called when an AAL5 PDU comes in */
+static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
+{
+ struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc);
+ DPRINTK("pppoatm push\n");
+ if (skb == NULL) { /* VCC was closed */
+ DPRINTK("removing ATMPPP VCC %p\n", pvcc);
+ pppoatm_unassign_vcc(atmvcc);
+ atmvcc->push(atmvcc, NULL); /* Pass along bad news */
+ return;
+ }
+ atm_return(atmvcc, skb->truesize);
+ switch (pvcc->encaps) {
+ case e_llc:
+ if (skb->len < LLC_LEN ||
+ memcmp(skb->data, pppllc, LLC_LEN))
+ goto error;
+ skb_pull(skb, LLC_LEN);
+ break;
+ case e_autodetect:
+ if (pvcc->chan.ppp == NULL) { /* Not bound yet! */
+ kfree_skb(skb);
+ return;
+ }
+ if (skb->len >= sizeof(pppllc) &&
+ !memcmp(skb->data, pppllc, sizeof(pppllc))) {
+ pvcc->encaps = e_llc;
+ skb_pull(skb, LLC_LEN);
+ break;
+ }
+ if (skb->len >= (sizeof(pppllc) - LLC_LEN) &&
+ !memcmp(skb->data, &pppllc[LLC_LEN],
+ sizeof(pppllc) - LLC_LEN)) {
+ pvcc->encaps = e_vc;
+ pvcc->chan.mtu += LLC_LEN;
+ break;
+ }
+ DPRINTK("(unit %d): Couldn't autodetect yet "
+ "(skb: %02X %02X %02X %02X %02X %02X)\n",
+ pvcc->chan.unit,
+ skb->data[0], skb->data[1], skb->data[2],
+ skb->data[3], skb->data[4], skb->data[5]);
+ goto error;
+ case e_vc:
+ break;
+ }
+ ppp_input(&pvcc->chan, skb);
+ return;
+ error:
+ kfree_skb(skb);
+ ppp_input_error(&pvcc->chan, 0);
+}
+
+/*
+ * Called by the ppp_generic.c to send a packet - returns true if packet
+ * was accepted. If we return false, then it's our job to call
+ * ppp_output_wakeup(chan) when we're feeling more up to it.
+ * Note that in the ENOMEM case (as opposed to the !atm_may_send case)
+ * we should really drop the packet, but the generic layer doesn't
+ * support this yet. We just return 'DROP_PACKET' which we actually define
+ * as success, just to be clear what we're really doing.
+ */
+#define DROP_PACKET 1
+static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb)
+{
+ struct pppoatm_vcc *pvcc = chan_to_pvcc(chan);
+ ATM_SKB(skb)->vcc = pvcc->atmvcc;
+ DPRINTK("(unit %d): pppoatm_send (skb=0x%p, vcc=0x%p)\n",
+ pvcc->chan.unit, skb, pvcc->atmvcc);
+ if (skb->data[0] == '\0' && (pvcc->flags & SC_COMP_PROT))
+ (void) skb_pull(skb, 1);
+ switch (pvcc->encaps) { /* LLC encapsulation needed */
+ case e_llc:
+ if (skb_headroom(skb) < LLC_LEN) {
+ struct sk_buff *n;
+ n = skb_realloc_headroom(skb, LLC_LEN);
+ if (n != NULL &&
+ !atm_may_send(pvcc->atmvcc, n->truesize)) {
+ kfree_skb(n);
+ goto nospace;
+ }
+ kfree_skb(skb);
+ if ((skb = n) == NULL)
+ return DROP_PACKET;
+ } else if (!atm_may_send(pvcc->atmvcc, skb->truesize))
+ goto nospace;
+ memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN);
+ break;
+ case e_vc:
+ if (!atm_may_send(pvcc->atmvcc, skb->truesize))
+ goto nospace;
+ break;
+ case e_autodetect:
+ DPRINTK("(unit %d): Trying to send without setting encaps!\n",
+ pvcc->chan.unit);
+ kfree_skb(skb);
+ return 1;
+ }
+
+ atomic_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc);
+ ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options;
+ DPRINTK("(unit %d): atm_skb(%p)->vcc(%p)->dev(%p)\n",
+ pvcc->chan.unit, skb, ATM_SKB(skb)->vcc,
+ ATM_SKB(skb)->vcc->dev);
+ return ATM_SKB(skb)->vcc->send(ATM_SKB(skb)->vcc, skb)
+ ? DROP_PACKET : 1;
+ nospace:
+ /*
+ * We don't have space to send this SKB now, but we might have
+ * already applied SC_COMP_PROT compression, so may need to undo
+ */
+ if ((pvcc->flags & SC_COMP_PROT) && skb_headroom(skb) > 0 &&
+ skb->data[-1] == '\0')
+ (void) skb_push(skb, 1);
+ return 0;
+}
+
+/* This handles ioctls sent to the /dev/ppp interface */
+static int pppoatm_devppp_ioctl(struct ppp_channel *chan, unsigned int cmd,
+ unsigned long arg)
+{
+ switch (cmd) {
+ case PPPIOCGFLAGS:
+ return put_user(chan_to_pvcc(chan)->flags, (int __user *) arg)
+ ? -EFAULT : 0;
+ case PPPIOCSFLAGS:
+ return get_user(chan_to_pvcc(chan)->flags, (int __user *) arg)
+ ? -EFAULT : 0;
+ }
+ return -ENOTTY;
+}
+
+static /*const*/ struct ppp_channel_ops pppoatm_ops = {
+ .start_xmit = pppoatm_send,
+ .ioctl = pppoatm_devppp_ioctl,
+};
+
+static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg)
+{
+ struct atm_backend_ppp be;
+ struct pppoatm_vcc *pvcc;
+ int err;
+ /*
+ * Each PPPoATM instance has its own tasklet - this is just a
+ * prototypical one used to initialize them
+ */
+ static const DECLARE_TASKLET(tasklet_proto, pppoatm_wakeup_sender, 0);
+ if (copy_from_user(&be, arg, sizeof be))
+ return -EFAULT;
+ if (be.encaps != PPPOATM_ENCAPS_AUTODETECT &&
+ be.encaps != PPPOATM_ENCAPS_VC && be.encaps != PPPOATM_ENCAPS_LLC)
+ return -EINVAL;
+ pvcc = kmalloc(sizeof(*pvcc), GFP_KERNEL);
+ if (pvcc == NULL)
+ return -ENOMEM;
+ memset(pvcc, 0, sizeof(*pvcc));
+ pvcc->atmvcc = atmvcc;
+ pvcc->old_push = atmvcc->push;
+ pvcc->old_pop = atmvcc->pop;
+ pvcc->encaps = (enum pppoatm_encaps) be.encaps;
+ pvcc->chan.private = pvcc;
+ pvcc->chan.ops = &pppoatm_ops;
+ pvcc->chan.mtu = atmvcc->qos.txtp.max_sdu - PPP_HDRLEN -
+ (be.encaps == e_vc ? 0 : LLC_LEN);
+ pvcc->wakeup_tasklet = tasklet_proto;
+ pvcc->wakeup_tasklet.data = (unsigned long) &pvcc->chan;
+ if ((err = ppp_register_channel(&pvcc->chan)) != 0) {
+ kfree(pvcc);
+ return err;
+ }
+ atmvcc->user_back = pvcc;
+ atmvcc->push = pppoatm_push;
+ atmvcc->pop = pppoatm_pop;
+ __module_get(THIS_MODULE);
+ return 0;
+}
+
+/*
+ * This handles ioctls actually performed on our vcc - we must return
+ * -ENOIOCTLCMD for any unrecognized ioctl
+ */
+static int pppoatm_ioctl(struct socket *sock, unsigned int cmd,
+ unsigned long arg)
+{
+ struct atm_vcc *atmvcc = ATM_SD(sock);
+ void __user *argp = (void __user *)arg;
+
+ if (cmd != ATM_SETBACKEND && atmvcc->push != pppoatm_push)
+ return -ENOIOCTLCMD;
+ switch (cmd) {
+ case ATM_SETBACKEND: {
+ atm_backend_t b;
+ if (get_user(b, (atm_backend_t __user *) argp))
+ return -EFAULT;
+ if (b != ATM_BACKEND_PPP)
+ return -ENOIOCTLCMD;
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ return pppoatm_assign_vcc(atmvcc, argp);
+ }
+ case PPPIOCGCHAN:
+ return put_user(ppp_channel_index(&atmvcc_to_pvcc(atmvcc)->
+ chan), (int __user *) argp) ? -EFAULT : 0;
+ case PPPIOCGUNIT:
+ return put_user(ppp_unit_number(&atmvcc_to_pvcc(atmvcc)->
+ chan), (int __user *) argp) ? -EFAULT : 0;
+ }
+ return -ENOIOCTLCMD;
+}
+
+static struct atm_ioctl pppoatm_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = pppoatm_ioctl,
+};
+
+static int __init pppoatm_init(void)
+{
+ register_atm_ioctl(&pppoatm_ioctl_ops);
+ return 0;
+}
+
+static void __exit pppoatm_exit(void)
+{
+ deregister_atm_ioctl(&pppoatm_ioctl_ops);
+}
+
+module_init(pppoatm_init);
+module_exit(pppoatm_exit);
+
+MODULE_AUTHOR("Mitchell Blank Jr <mitch@sfgoth.com>");
+MODULE_DESCRIPTION("RFC2364 PPP over ATM/AAL5");
+MODULE_LICENSE("GPL");
diff --git a/net/atm/proc.c b/net/atm/proc.c
new file mode 100644
index 00000000000..4041054e528
--- /dev/null
+++ b/net/atm/proc.c
@@ -0,0 +1,514 @@
+/* net/atm/proc.c - ATM /proc interface
+ *
+ * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA
+ *
+ * seq_file api usage by romieu@fr.zoreil.com
+ *
+ * Evaluating the efficiency of the whole thing if left as an exercise to
+ * the reader.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h> /* for EXPORT_SYMBOL */
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/errno.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/netdevice.h>
+#include <linux/atmclip.h>
+#include <linux/init.h> /* for __init */
+#include <net/atmclip.h>
+#include <asm/uaccess.h>
+#include <asm/atomic.h>
+#include <asm/param.h> /* for HZ */
+#include "resources.h"
+#include "common.h" /* atm_proc_init prototype */
+#include "signaling.h" /* to get sigd - ugly too */
+
+static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count,
+ loff_t *pos);
+
+static struct file_operations proc_atm_dev_ops = {
+ .owner = THIS_MODULE,
+ .read = proc_dev_atm_read,
+};
+
+static void add_stats(struct seq_file *seq, const char *aal,
+ const struct k_atm_aal_stats *stats)
+{
+ seq_printf(seq, "%s ( %d %d %d %d %d )", aal,
+ atomic_read(&stats->tx),atomic_read(&stats->tx_err),
+ atomic_read(&stats->rx),atomic_read(&stats->rx_err),
+ atomic_read(&stats->rx_drop));
+}
+
+static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev)
+{
+ int i;
+
+ seq_printf(seq, "%3d %-8s", dev->number, dev->type);
+ for (i = 0; i < ESI_LEN; i++)
+ seq_printf(seq, "%02x", dev->esi[i]);
+ seq_puts(seq, " ");
+ add_stats(seq, "0", &dev->stats.aal0);
+ seq_puts(seq, " ");
+ add_stats(seq, "5", &dev->stats.aal5);
+ seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt));
+ seq_putc(seq, '\n');
+}
+
+struct vcc_state {
+ int bucket;
+ struct sock *sk;
+ int family;
+};
+
+static inline int compare_family(struct sock *sk, int family)
+{
+ return !family || (sk->sk_family == family);
+}
+
+static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l)
+{
+ struct sock *sk = *sock;
+
+ if (sk == (void *)1) {
+ for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) {
+ struct hlist_head *head = &vcc_hash[*bucket];
+
+ sk = hlist_empty(head) ? NULL : __sk_head(head);
+ if (sk)
+ break;
+ }
+ l--;
+ }
+try_again:
+ for (; sk; sk = sk_next(sk)) {
+ l -= compare_family(sk, family);
+ if (l < 0)
+ goto out;
+ }
+ if (!sk && ++*bucket < VCC_HTABLE_SIZE) {
+ sk = sk_head(&vcc_hash[*bucket]);
+ goto try_again;
+ }
+ sk = (void *)1;
+out:
+ *sock = sk;
+ return (l < 0);
+}
+
+static inline void *vcc_walk(struct vcc_state *state, loff_t l)
+{
+ return __vcc_walk(&state->sk, state->family, &state->bucket, l) ?
+ state : NULL;
+}
+
+static int __vcc_seq_open(struct inode *inode, struct file *file,
+ int family, struct seq_operations *ops)
+{
+ struct vcc_state *state;
+ struct seq_file *seq;
+ int rc = -ENOMEM;
+
+ state = kmalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ goto out;
+
+ rc = seq_open(file, ops);
+ if (rc)
+ goto out_kfree;
+
+ state->family = family;
+
+ seq = file->private_data;
+ seq->private = state;
+out:
+ return rc;
+out_kfree:
+ kfree(state);
+ goto out;
+}
+
+static int vcc_seq_release(struct inode *inode, struct file *file)
+{
+ return seq_release_private(inode, file);
+}
+
+static void *vcc_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct vcc_state *state = seq->private;
+ loff_t left = *pos;
+
+ read_lock(&vcc_sklist_lock);
+ state->sk = (void *)1;
+ return left ? vcc_walk(state, left) : (void *)1;
+}
+
+static void vcc_seq_stop(struct seq_file *seq, void *v)
+{
+ read_unlock(&vcc_sklist_lock);
+}
+
+static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct vcc_state *state = seq->private;
+
+ v = vcc_walk(state, 1);
+ *pos += !!PTR_ERR(v);
+ return v;
+}
+
+static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+ static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" };
+ static const char *aal_name[] = {
+ "---", "1", "2", "3/4", /* 0- 3 */
+ "???", "5", "???", "???", /* 4- 7 */
+ "???", "???", "???", "???", /* 8-11 */
+ "???", "0", "???", "???"}; /* 12-15 */
+
+ seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s",
+ vcc->dev->number,vcc->vpi,vcc->vci,
+ vcc->qos.aal >= sizeof(aal_name)/sizeof(aal_name[0]) ? "err" :
+ aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr,
+ class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr,
+ class_name[vcc->qos.txtp.traffic_class]);
+ if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) {
+ struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
+ struct net_device *dev;
+
+ dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL;
+ seq_printf(seq, "CLIP, Itf:%s, Encap:",
+ dev ? dev->name : "none?");
+ seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None");
+ }
+ seq_putc(seq, '\n');
+}
+
+static const char *vcc_state(struct atm_vcc *vcc)
+{
+ static const char *map[] = { ATM_VS2TXT_MAP };
+
+ return map[ATM_VF2VS(vcc->flags)];
+}
+
+static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ seq_printf(seq, "%p ", vcc);
+ if (!vcc->dev)
+ seq_printf(seq, "Unassigned ");
+ else
+ seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi,
+ vcc->vci);
+ switch (sk->sk_family) {
+ case AF_ATMPVC:
+ seq_printf(seq, "PVC");
+ break;
+ case AF_ATMSVC:
+ seq_printf(seq, "SVC");
+ break;
+ default:
+ seq_printf(seq, "%3d", sk->sk_family);
+ }
+ seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err,
+ atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf,
+ atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf,
+ atomic_read(&sk->sk_refcnt));
+}
+
+static void svc_info(struct seq_file *seq, struct atm_vcc *vcc)
+{
+ if (!vcc->dev)
+ seq_printf(seq, sizeof(void *) == 4 ?
+ "N/A@%p%10s" : "N/A@%p%2s", vcc, "");
+ else
+ seq_printf(seq, "%3d %3d %5d ",
+ vcc->dev->number, vcc->vpi, vcc->vci);
+ seq_printf(seq, "%-10s ", vcc_state(vcc));
+ seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub,
+ *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : "");
+ if (*vcc->remote.sas_addr.prv) {
+ int i;
+
+ for (i = 0; i < ATM_ESA_LEN; i++)
+ seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]);
+ }
+ seq_putc(seq, '\n');
+}
+
+static int atm_dev_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_dev_banner[] =
+ "Itf Type ESI/\"MAC\"addr "
+ "AAL(TX,err,RX,err,drop) ... [refcnt]\n";
+
+ if (v == (void *)1)
+ seq_puts(seq, atm_dev_banner);
+ else {
+ struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
+
+ atm_dev_info(seq, dev);
+ }
+ return 0;
+}
+
+static struct seq_operations atm_dev_seq_ops = {
+ .start = atm_dev_seq_start,
+ .next = atm_dev_seq_next,
+ .stop = atm_dev_seq_stop,
+ .show = atm_dev_seq_show,
+};
+
+static int atm_dev_seq_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &atm_dev_seq_ops);
+}
+
+static struct file_operations devices_seq_fops = {
+ .open = atm_dev_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+static int pvc_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_pvc_banner[] =
+ "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n";
+
+ if (v == (void *)1)
+ seq_puts(seq, atm_pvc_banner);
+ else {
+ struct vcc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ pvc_info(seq, vcc);
+ }
+ return 0;
+}
+
+static struct seq_operations pvc_seq_ops = {
+ .start = vcc_seq_start,
+ .next = vcc_seq_next,
+ .stop = vcc_seq_stop,
+ .show = pvc_seq_show,
+};
+
+static int pvc_seq_open(struct inode *inode, struct file *file)
+{
+ return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops);
+}
+
+static struct file_operations pvc_seq_fops = {
+ .open = pvc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = vcc_seq_release,
+};
+
+static int vcc_seq_show(struct seq_file *seq, void *v)
+{
+ if (v == (void *)1) {
+ seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s",
+ "Address ", "Itf VPI VCI Fam Flags Reply "
+ "Send buffer Recv buffer [refcnt]\n");
+ } else {
+ struct vcc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ vcc_info(seq, vcc);
+ }
+ return 0;
+}
+
+static struct seq_operations vcc_seq_ops = {
+ .start = vcc_seq_start,
+ .next = vcc_seq_next,
+ .stop = vcc_seq_stop,
+ .show = vcc_seq_show,
+};
+
+static int vcc_seq_open(struct inode *inode, struct file *file)
+{
+ return __vcc_seq_open(inode, file, 0, &vcc_seq_ops);
+}
+
+static struct file_operations vcc_seq_fops = {
+ .open = vcc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = vcc_seq_release,
+};
+
+static int svc_seq_show(struct seq_file *seq, void *v)
+{
+ static char atm_svc_banner[] =
+ "Itf VPI VCI State Remote\n";
+
+ if (v == (void *)1)
+ seq_puts(seq, atm_svc_banner);
+ else {
+ struct vcc_state *state = seq->private;
+ struct atm_vcc *vcc = atm_sk(state->sk);
+
+ svc_info(seq, vcc);
+ }
+ return 0;
+}
+
+static struct seq_operations svc_seq_ops = {
+ .start = vcc_seq_start,
+ .next = vcc_seq_next,
+ .stop = vcc_seq_stop,
+ .show = svc_seq_show,
+};
+
+static int svc_seq_open(struct inode *inode, struct file *file)
+{
+ return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops);
+}
+
+static struct file_operations svc_seq_fops = {
+ .open = svc_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = vcc_seq_release,
+};
+
+static ssize_t proc_dev_atm_read(struct file *file, char __user *buf,
+ size_t count, loff_t *pos)
+{
+ struct atm_dev *dev;
+ unsigned long page;
+ int length;
+
+ if (count == 0) return 0;
+ page = get_zeroed_page(GFP_KERNEL);
+ if (!page) return -ENOMEM;
+ dev = PDE(file->f_dentry->d_inode)->data;
+ if (!dev->ops->proc_read)
+ length = -EINVAL;
+ else {
+ length = dev->ops->proc_read(dev,pos,(char *) page);
+ if (length > count) length = -EINVAL;
+ }
+ if (length >= 0) {
+ if (copy_to_user(buf,(char *) page,length)) length = -EFAULT;
+ (*pos)++;
+ }
+ free_page(page);
+ return length;
+}
+
+
+struct proc_dir_entry *atm_proc_root;
+EXPORT_SYMBOL(atm_proc_root);
+
+
+int atm_proc_dev_register(struct atm_dev *dev)
+{
+ int digits,num;
+ int error;
+
+ /* No proc info */
+ if (!dev->ops->proc_read)
+ return 0;
+
+ error = -ENOMEM;
+ digits = 0;
+ for (num = dev->number; num; num /= 10) digits++;
+ if (!digits) digits++;
+
+ dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL);
+ if (!dev->proc_name)
+ goto err_out;
+ sprintf(dev->proc_name,"%s:%d",dev->type, dev->number);
+
+ dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root);
+ if (!dev->proc_entry)
+ goto err_free_name;
+ dev->proc_entry->data = dev;
+ dev->proc_entry->proc_fops = &proc_atm_dev_ops;
+ dev->proc_entry->owner = THIS_MODULE;
+ return 0;
+err_free_name:
+ kfree(dev->proc_name);
+err_out:
+ return error;
+}
+
+
+void atm_proc_dev_deregister(struct atm_dev *dev)
+{
+ if (!dev->ops->proc_read)
+ return;
+
+ remove_proc_entry(dev->proc_name, atm_proc_root);
+ kfree(dev->proc_name);
+}
+
+static struct atm_proc_entry {
+ char *name;
+ struct file_operations *proc_fops;
+ struct proc_dir_entry *dirent;
+} atm_proc_ents[] = {
+ { .name = "devices", .proc_fops = &devices_seq_fops },
+ { .name = "pvc", .proc_fops = &pvc_seq_fops },
+ { .name = "svc", .proc_fops = &svc_seq_fops },
+ { .name = "vc", .proc_fops = &vcc_seq_fops },
+ { .name = NULL, .proc_fops = NULL }
+};
+
+static void atm_proc_dirs_remove(void)
+{
+ static struct atm_proc_entry *e;
+
+ for (e = atm_proc_ents; e->name; e++) {
+ if (e->dirent)
+ remove_proc_entry(e->name, atm_proc_root);
+ }
+ remove_proc_entry("net/atm", NULL);
+}
+
+int __init atm_proc_init(void)
+{
+ static struct atm_proc_entry *e;
+ int ret;
+
+ atm_proc_root = proc_mkdir("net/atm",NULL);
+ if (!atm_proc_root)
+ goto err_out;
+ for (e = atm_proc_ents; e->name; e++) {
+ struct proc_dir_entry *dirent;
+
+ dirent = create_proc_entry(e->name, S_IRUGO, atm_proc_root);
+ if (!dirent)
+ goto err_out_remove;
+ dirent->proc_fops = e->proc_fops;
+ dirent->owner = THIS_MODULE;
+ e->dirent = dirent;
+ }
+ ret = 0;
+out:
+ return ret;
+
+err_out_remove:
+ atm_proc_dirs_remove();
+err_out:
+ ret = -ENOMEM;
+ goto out;
+}
+
+void __exit atm_proc_exit(void)
+{
+ atm_proc_dirs_remove();
+}
diff --git a/net/atm/protocols.h b/net/atm/protocols.h
new file mode 100644
index 00000000000..acdfc856222
--- /dev/null
+++ b/net/atm/protocols.h
@@ -0,0 +1,13 @@
+/* net/atm/protocols.h - ATM protocol handler entry points */
+
+/* Written 1995-1997 by Werner Almesberger, EPFL LRC */
+
+
+#ifndef NET_ATM_PROTOCOLS_H
+#define NET_ATM_PROTOCOLS_H
+
+int atm_init_aal0(struct atm_vcc *vcc); /* "raw" AAL0 */
+int atm_init_aal34(struct atm_vcc *vcc);/* "raw" AAL3/4 transport */
+int atm_init_aal5(struct atm_vcc *vcc); /* "raw" AAL5 transport */
+
+#endif
diff --git a/net/atm/pvc.c b/net/atm/pvc.c
new file mode 100644
index 00000000000..2684a92da22
--- /dev/null
+++ b/net/atm/pvc.c
@@ -0,0 +1,155 @@
+/* net/atm/pvc.c - ATM PVC sockets */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/config.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmdev.h> /* ATM devices */
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+#include <net/sock.h> /* for sock_no_* */
+
+#include "resources.h" /* devs and vccs */
+#include "common.h" /* common for PVCs and SVCs */
+
+
+static int pvc_shutdown(struct socket *sock,int how)
+{
+ return 0;
+}
+
+
+static int pvc_bind(struct socket *sock,struct sockaddr *sockaddr,
+ int sockaddr_len)
+{
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmpvc *addr;
+ struct atm_vcc *vcc;
+ int error;
+
+ if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) return -EINVAL;
+ addr = (struct sockaddr_atmpvc *) sockaddr;
+ if (addr->sap_family != AF_ATMPVC) return -EAFNOSUPPORT;
+ lock_sock(sk);
+ vcc = ATM_SD(sock);
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) {
+ if (vcc->vpi != ATM_VPI_UNSPEC) addr->sap_addr.vpi = vcc->vpi;
+ if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci;
+ }
+ error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi,
+ addr->sap_addr.vci);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr,
+ int sockaddr_len,int flags)
+{
+ return pvc_bind(sock,sockaddr,sockaddr_len);
+}
+
+static int pvc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+ int error;
+
+ lock_sock(sk);
+ error = vcc_setsockopt(sock, level, optname, optval, optlen);
+ release_sock(sk);
+ return error;
+}
+
+
+static int pvc_getsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ int error;
+
+ lock_sock(sk);
+ error = vcc_getsockopt(sock, level, optname, optval, optlen);
+ release_sock(sk);
+ return error;
+}
+
+
+static int pvc_getname(struct socket *sock,struct sockaddr *sockaddr,
+ int *sockaddr_len,int peer)
+{
+ struct sockaddr_atmpvc *addr;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ if (!vcc->dev || !test_bit(ATM_VF_ADDR,&vcc->flags)) return -ENOTCONN;
+ *sockaddr_len = sizeof(struct sockaddr_atmpvc);
+ addr = (struct sockaddr_atmpvc *) sockaddr;
+ addr->sap_family = AF_ATMPVC;
+ addr->sap_addr.itf = vcc->dev->number;
+ addr->sap_addr.vpi = vcc->vpi;
+ addr->sap_addr.vci = vcc->vci;
+ return 0;
+}
+
+
+static struct proto_ops pvc_proto_ops = {
+ .family = PF_ATMPVC,
+ .owner = THIS_MODULE,
+
+ .release = vcc_release,
+ .bind = pvc_bind,
+ .connect = pvc_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = pvc_getname,
+ .poll = vcc_poll,
+ .ioctl = vcc_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = pvc_shutdown,
+ .setsockopt = pvc_setsockopt,
+ .getsockopt = pvc_getsockopt,
+ .sendmsg = vcc_sendmsg,
+ .recvmsg = vcc_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+
+static int pvc_create(struct socket *sock,int protocol)
+{
+ sock->ops = &pvc_proto_ops;
+ return vcc_create(sock, protocol, PF_ATMPVC);
+}
+
+
+static struct net_proto_family pvc_family_ops = {
+ .family = PF_ATMPVC,
+ .create = pvc_create,
+ .owner = THIS_MODULE,
+};
+
+
+/*
+ * Initialize the ATM PVC protocol family
+ */
+
+
+int __init atmpvc_init(void)
+{
+ return sock_register(&pvc_family_ops);
+}
+
+void atmpvc_exit(void)
+{
+ sock_unregister(PF_ATMPVC);
+}
diff --git a/net/atm/raw.c b/net/atm/raw.c
new file mode 100644
index 00000000000..4a0466e91aa
--- /dev/null
+++ b/net/atm/raw.c
@@ -0,0 +1,98 @@
+/* net/atm/raw.c - Raw AAL0 and AAL5 transports */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/atmdev.h>
+#include <linux/kernel.h>
+#include <linux/skbuff.h>
+#include <linux/mm.h>
+
+#include "common.h"
+#include "protocols.h"
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+/*
+ * SKB == NULL indicates that the link is being closed
+ */
+
+static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ if (skb) {
+ struct sock *sk = sk_atm(vcc);
+
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+ }
+}
+
+
+static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ struct sock *sk = sk_atm(vcc);
+
+ DPRINTK("APopR (%d) %d -= %d\n", vcc->vci, sk->sk_wmem_alloc,
+ skb->truesize);
+ atomic_sub(skb->truesize, &sk->sk_wmem_alloc);
+ dev_kfree_skb_any(skb);
+ sk->sk_write_space(sk);
+}
+
+
+static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ /*
+ * Note that if vpi/vci are _ANY or _UNSPEC the below will
+ * still work
+ */
+ if (!capable(CAP_NET_ADMIN) &&
+ (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) !=
+ ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT)))
+ {
+ kfree_skb(skb);
+ return -EADDRNOTAVAIL;
+ }
+ return vcc->dev->ops->send(vcc,skb);
+}
+
+
+int atm_init_aal0(struct atm_vcc *vcc)
+{
+ vcc->push = atm_push_raw;
+ vcc->pop = atm_pop_raw;
+ vcc->push_oam = NULL;
+ vcc->send = atm_send_aal0;
+ return 0;
+}
+
+
+int atm_init_aal34(struct atm_vcc *vcc)
+{
+ vcc->push = atm_push_raw;
+ vcc->pop = atm_pop_raw;
+ vcc->push_oam = NULL;
+ vcc->send = vcc->dev->ops->send;
+ return 0;
+}
+
+
+int atm_init_aal5(struct atm_vcc *vcc)
+{
+ vcc->push = atm_push_raw;
+ vcc->pop = atm_pop_raw;
+ vcc->push_oam = NULL;
+ vcc->send = vcc->dev->ops->send;
+ return 0;
+}
+
+
+EXPORT_SYMBOL(atm_init_aal5);
diff --git a/net/atm/resources.c b/net/atm/resources.c
new file mode 100644
index 00000000000..33f1685dbb7
--- /dev/null
+++ b/net/atm/resources.c
@@ -0,0 +1,432 @@
+/* net/atm/resources.c - Statically allocated resources */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+/* Fixes
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+ * 2002/01 - don't free the whole struct sock on sk->destruct time,
+ * use the default destruct function initialized by sock_init_data */
+
+
+#include <linux/config.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/atmdev.h>
+#include <linux/sonet.h>
+#include <linux/kernel.h> /* for barrier */
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <net/sock.h> /* for struct sock */
+
+#include "common.h"
+#include "resources.h"
+#include "addr.h"
+
+
+LIST_HEAD(atm_devs);
+DEFINE_SPINLOCK(atm_dev_lock);
+
+static struct atm_dev *__alloc_atm_dev(const char *type)
+{
+ struct atm_dev *dev;
+
+ dev = kmalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+ memset(dev, 0, sizeof(*dev));
+ dev->type = type;
+ dev->signal = ATM_PHY_SIG_UNKNOWN;
+ dev->link_rate = ATM_OC3_PCR;
+ spin_lock_init(&dev->lock);
+ INIT_LIST_HEAD(&dev->local);
+
+ return dev;
+}
+
+static void __free_atm_dev(struct atm_dev *dev)
+{
+ kfree(dev);
+}
+
+static struct atm_dev *__atm_dev_lookup(int number)
+{
+ struct atm_dev *dev;
+ struct list_head *p;
+
+ list_for_each(p, &atm_devs) {
+ dev = list_entry(p, struct atm_dev, dev_list);
+ if ((dev->ops) && (dev->number == number)) {
+ atm_dev_hold(dev);
+ return dev;
+ }
+ }
+ return NULL;
+}
+
+struct atm_dev *atm_dev_lookup(int number)
+{
+ struct atm_dev *dev;
+
+ spin_lock(&atm_dev_lock);
+ dev = __atm_dev_lookup(number);
+ spin_unlock(&atm_dev_lock);
+ return dev;
+}
+
+struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops,
+ int number, unsigned long *flags)
+{
+ struct atm_dev *dev, *inuse;
+
+ dev = __alloc_atm_dev(type);
+ if (!dev) {
+ printk(KERN_ERR "atm_dev_register: no space for dev %s\n",
+ type);
+ return NULL;
+ }
+ spin_lock(&atm_dev_lock);
+ if (number != -1) {
+ if ((inuse = __atm_dev_lookup(number))) {
+ atm_dev_put(inuse);
+ spin_unlock(&atm_dev_lock);
+ __free_atm_dev(dev);
+ return NULL;
+ }
+ dev->number = number;
+ } else {
+ dev->number = 0;
+ while ((inuse = __atm_dev_lookup(dev->number))) {
+ atm_dev_put(inuse);
+ dev->number++;
+ }
+ }
+
+ dev->ops = ops;
+ if (flags)
+ dev->flags = *flags;
+ else
+ memset(&dev->flags, 0, sizeof(dev->flags));
+ memset(&dev->stats, 0, sizeof(dev->stats));
+ atomic_set(&dev->refcnt, 1);
+ list_add_tail(&dev->dev_list, &atm_devs);
+ spin_unlock(&atm_dev_lock);
+
+ if (atm_proc_dev_register(dev) < 0) {
+ printk(KERN_ERR "atm_dev_register: "
+ "atm_proc_dev_register failed for dev %s\n",
+ type);
+ spin_lock(&atm_dev_lock);
+ list_del(&dev->dev_list);
+ spin_unlock(&atm_dev_lock);
+ __free_atm_dev(dev);
+ return NULL;
+ }
+
+ return dev;
+}
+
+
+void atm_dev_deregister(struct atm_dev *dev)
+{
+ unsigned long warning_time;
+
+ atm_proc_dev_deregister(dev);
+
+ spin_lock(&atm_dev_lock);
+ list_del(&dev->dev_list);
+ spin_unlock(&atm_dev_lock);
+
+ warning_time = jiffies;
+ while (atomic_read(&dev->refcnt) != 1) {
+ msleep(250);
+ if ((jiffies - warning_time) > 10 * HZ) {
+ printk(KERN_EMERG "atm_dev_deregister: waiting for "
+ "dev %d to become free. Usage count = %d\n",
+ dev->number, atomic_read(&dev->refcnt));
+ warning_time = jiffies;
+ }
+ }
+
+ __free_atm_dev(dev);
+}
+
+void shutdown_atm_dev(struct atm_dev *dev)
+{
+ if (atomic_read(&dev->refcnt) > 1) {
+ set_bit(ATM_DF_CLOSE, &dev->flags);
+ return;
+ }
+ if (dev->ops->dev_close)
+ dev->ops->dev_close(dev);
+ atm_dev_deregister(dev);
+}
+
+
+static void copy_aal_stats(struct k_atm_aal_stats *from,
+ struct atm_aal_stats *to)
+{
+#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i)
+ __AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+}
+
+
+static void subtract_aal_stats(struct k_atm_aal_stats *from,
+ struct atm_aal_stats *to)
+{
+#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i)
+ __AAL_STAT_ITEMS
+#undef __HANDLE_ITEM
+}
+
+
+static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg, int zero)
+{
+ struct atm_dev_stats tmp;
+ int error = 0;
+
+ copy_aal_stats(&dev->stats.aal0, &tmp.aal0);
+ copy_aal_stats(&dev->stats.aal34, &tmp.aal34);
+ copy_aal_stats(&dev->stats.aal5, &tmp.aal5);
+ if (arg)
+ error = copy_to_user(arg, &tmp, sizeof(tmp));
+ if (zero && !error) {
+ subtract_aal_stats(&dev->stats.aal0, &tmp.aal0);
+ subtract_aal_stats(&dev->stats.aal34, &tmp.aal34);
+ subtract_aal_stats(&dev->stats.aal5, &tmp.aal5);
+ }
+ return error ? -EFAULT : 0;
+}
+
+
+int atm_dev_ioctl(unsigned int cmd, void __user *arg)
+{
+ void __user *buf;
+ int error, len, number, size = 0;
+ struct atm_dev *dev;
+ struct list_head *p;
+ int *tmp_buf, *tmp_p;
+ struct atm_iobuf __user *iobuf = arg;
+ struct atmif_sioc __user *sioc = arg;
+ switch (cmd) {
+ case ATM_GETNAMES:
+ if (get_user(buf, &iobuf->buffer))
+ return -EFAULT;
+ if (get_user(len, &iobuf->length))
+ return -EFAULT;
+ spin_lock(&atm_dev_lock);
+ list_for_each(p, &atm_devs)
+ size += sizeof(int);
+ if (size > len) {
+ spin_unlock(&atm_dev_lock);
+ return -E2BIG;
+ }
+ tmp_buf = kmalloc(size, GFP_ATOMIC);
+ if (!tmp_buf) {
+ spin_unlock(&atm_dev_lock);
+ return -ENOMEM;
+ }
+ tmp_p = tmp_buf;
+ list_for_each(p, &atm_devs) {
+ dev = list_entry(p, struct atm_dev, dev_list);
+ *tmp_p++ = dev->number;
+ }
+ spin_unlock(&atm_dev_lock);
+ error = ((copy_to_user(buf, tmp_buf, size)) ||
+ put_user(size, &iobuf->length))
+ ? -EFAULT : 0;
+ kfree(tmp_buf);
+ return error;
+ default:
+ break;
+ }
+
+ if (get_user(buf, &sioc->arg))
+ return -EFAULT;
+ if (get_user(len, &sioc->length))
+ return -EFAULT;
+ if (get_user(number, &sioc->number))
+ return -EFAULT;
+
+ if (!(dev = atm_dev_lookup(number)))
+ return -ENODEV;
+
+ switch (cmd) {
+ case ATM_GETTYPE:
+ size = strlen(dev->type) + 1;
+ if (copy_to_user(buf, dev->type, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_GETESI:
+ size = ESI_LEN;
+ if (copy_to_user(buf, dev->esi, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_SETESI:
+ {
+ int i;
+
+ for (i = 0; i < ESI_LEN; i++)
+ if (dev->esi[i]) {
+ error = -EEXIST;
+ goto done;
+ }
+ }
+ /* fall through */
+ case ATM_SETESIF:
+ {
+ unsigned char esi[ESI_LEN];
+
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ if (copy_from_user(esi, buf, ESI_LEN)) {
+ error = -EFAULT;
+ goto done;
+ }
+ memcpy(dev->esi, esi, ESI_LEN);
+ error = ESI_LEN;
+ goto done;
+ }
+ case ATM_GETSTATZ:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ /* fall through */
+ case ATM_GETSTAT:
+ size = sizeof(struct atm_dev_stats);
+ error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
+ if (error)
+ goto done;
+ break;
+ case ATM_GETCIRANGE:
+ size = sizeof(struct atm_cirange);
+ if (copy_to_user(buf, &dev->ci_range, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_GETLINKRATE:
+ size = sizeof(int);
+ if (copy_to_user(buf, &dev->link_rate, size)) {
+ error = -EFAULT;
+ goto done;
+ }
+ break;
+ case ATM_RSTADDR:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ atm_reset_addr(dev);
+ break;
+ case ATM_ADDADDR:
+ case ATM_DELADDR:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ {
+ struct sockaddr_atmsvc addr;
+
+ if (copy_from_user(&addr, buf, sizeof(addr))) {
+ error = -EFAULT;
+ goto done;
+ }
+ if (cmd == ATM_ADDADDR)
+ error = atm_add_addr(dev, &addr);
+ else
+ error = atm_del_addr(dev, &addr);
+ goto done;
+ }
+ case ATM_GETADDR:
+ error = atm_get_addr(dev, buf, len);
+ if (error < 0)
+ goto done;
+ size = error;
+ /* may return 0, but later on size == 0 means "don't
+ write the length" */
+ error = put_user(size, &sioc->length)
+ ? -EFAULT : 0;
+ goto done;
+ case ATM_SETLOOP:
+ if (__ATM_LM_XTRMT((int) (unsigned long) buf) &&
+ __ATM_LM_XTLOC((int) (unsigned long) buf) >
+ __ATM_LM_XTRMT((int) (unsigned long) buf)) {
+ error = -EINVAL;
+ goto done;
+ }
+ /* fall through */
+ case ATM_SETCIRANGE:
+ case SONET_GETSTATZ:
+ case SONET_SETDIAG:
+ case SONET_CLRDIAG:
+ case SONET_SETFRAMING:
+ if (!capable(CAP_NET_ADMIN)) {
+ error = -EPERM;
+ goto done;
+ }
+ /* fall through */
+ default:
+ if (!dev->ops->ioctl) {
+ error = -EINVAL;
+ goto done;
+ }
+ size = dev->ops->ioctl(dev, cmd, buf);
+ if (size < 0) {
+ error = (size == -ENOIOCTLCMD ? -EINVAL : size);
+ goto done;
+ }
+ }
+
+ if (size)
+ error = put_user(size, &sioc->length)
+ ? -EFAULT : 0;
+ else
+ error = 0;
+done:
+ atm_dev_put(dev);
+ return error;
+}
+
+static __inline__ void *dev_get_idx(loff_t left)
+{
+ struct list_head *p;
+
+ list_for_each(p, &atm_devs) {
+ if (!--left)
+ break;
+ }
+ return (p != &atm_devs) ? p : NULL;
+}
+
+void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ spin_lock(&atm_dev_lock);
+ return *pos ? dev_get_idx(*pos) : (void *) 1;
+}
+
+void atm_dev_seq_stop(struct seq_file *seq, void *v)
+{
+ spin_unlock(&atm_dev_lock);
+}
+
+void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ ++*pos;
+ v = (v == (void *)1) ? atm_devs.next : ((struct list_head *)v)->next;
+ return (v == &atm_devs) ? NULL : v;
+}
+
+
+EXPORT_SYMBOL(atm_dev_register);
+EXPORT_SYMBOL(atm_dev_deregister);
+EXPORT_SYMBOL(atm_dev_lookup);
+EXPORT_SYMBOL(shutdown_atm_dev);
diff --git a/net/atm/resources.h b/net/atm/resources.h
new file mode 100644
index 00000000000..12910619dbb
--- /dev/null
+++ b/net/atm/resources.h
@@ -0,0 +1,46 @@
+/* net/atm/resources.h - ATM-related resources */
+
+/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_RESOURCES_H
+#define NET_ATM_RESOURCES_H
+
+#include <linux/config.h>
+#include <linux/atmdev.h>
+
+
+extern struct list_head atm_devs;
+extern spinlock_t atm_dev_lock;
+
+
+int atm_dev_ioctl(unsigned int cmd, void __user *arg);
+
+
+#ifdef CONFIG_PROC_FS
+
+#include <linux/proc_fs.h>
+
+void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
+void atm_dev_seq_stop(struct seq_file *seq, void *v);
+void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
+
+
+int atm_proc_dev_register(struct atm_dev *dev);
+void atm_proc_dev_deregister(struct atm_dev *dev);
+
+#else
+
+static inline int atm_proc_dev_register(struct atm_dev *dev)
+{
+ return 0;
+}
+
+static inline void atm_proc_dev_deregister(struct atm_dev *dev)
+{
+ /* nothing */
+}
+
+#endif /* CONFIG_PROC_FS */
+
+#endif
diff --git a/net/atm/signaling.c b/net/atm/signaling.c
new file mode 100644
index 00000000000..6ff803154c0
--- /dev/null
+++ b/net/atm/signaling.c
@@ -0,0 +1,280 @@
+/* net/atm/signaling.c - ATM signaling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched.h> /* jiffies and HZ */
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+
+#include "resources.h"
+#include "signaling.h"
+
+
+#undef WAIT_FOR_DEMON /* #define this if system calls on SVC sockets
+ should block until the demon runs.
+ Danger: may cause nasty hangs if the demon
+ crashes. */
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+struct atm_vcc *sigd = NULL;
+#ifdef WAIT_FOR_DEMON
+static DECLARE_WAIT_QUEUE_HEAD(sigd_sleep);
+#endif
+
+
+static void sigd_put_skb(struct sk_buff *skb)
+{
+#ifdef WAIT_FOR_DEMON
+ static unsigned long silence;
+ DECLARE_WAITQUEUE(wait,current);
+
+ add_wait_queue(&sigd_sleep,&wait);
+ while (!sigd) {
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ if (time_after(jiffies, silence) || silence == 0) {
+ printk(KERN_INFO "atmsvc: waiting for signaling demon "
+ "...\n");
+ silence = (jiffies+30*HZ)|1;
+ }
+ schedule();
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&sigd_sleep,&wait);
+#else
+ if (!sigd) {
+ printk(KERN_WARNING "atmsvc: no signaling demon\n");
+ kfree_skb(skb);
+ return;
+ }
+#endif
+ atm_force_charge(sigd,skb->truesize);
+ skb_queue_tail(&sk_atm(sigd)->sk_receive_queue,skb);
+ sk_atm(sigd)->sk_data_ready(sk_atm(sigd), skb->len);
+}
+
+
+static void modify_qos(struct atm_vcc *vcc,struct atmsvc_msg *msg)
+{
+ struct sk_buff *skb;
+
+ if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
+ !test_bit(ATM_VF_READY,&vcc->flags))
+ return;
+ msg->type = as_error;
+ if (!vcc->dev->ops->change_qos) msg->reply = -EOPNOTSUPP;
+ else {
+ /* should lock VCC */
+ msg->reply = vcc->dev->ops->change_qos(vcc,&msg->qos,
+ msg->reply);
+ if (!msg->reply) msg->type = as_okay;
+ }
+ /*
+ * Should probably just turn around the old skb. But the, the buffer
+ * space accounting needs to follow the change too. Maybe later.
+ */
+ while (!(skb = alloc_skb(sizeof(struct atmsvc_msg),GFP_KERNEL)))
+ schedule();
+ *(struct atmsvc_msg *) skb_put(skb,sizeof(struct atmsvc_msg)) = *msg;
+ sigd_put_skb(skb);
+}
+
+
+static int sigd_send(struct atm_vcc *vcc,struct sk_buff *skb)
+{
+ struct atmsvc_msg *msg;
+ struct atm_vcc *session_vcc;
+ struct sock *sk;
+
+ msg = (struct atmsvc_msg *) skb->data;
+ atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ DPRINTK("sigd_send %d (0x%lx)\n",(int) msg->type,
+ (unsigned long) msg->vcc);
+ vcc = *(struct atm_vcc **) &msg->vcc;
+ sk = sk_atm(vcc);
+
+ switch (msg->type) {
+ case as_okay:
+ sk->sk_err = -msg->reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ if (!*vcc->local.sas_addr.prv &&
+ !*vcc->local.sas_addr.pub) {
+ vcc->local.sas_family = AF_ATMSVC;
+ memcpy(vcc->local.sas_addr.prv,
+ msg->local.sas_addr.prv,ATM_ESA_LEN);
+ memcpy(vcc->local.sas_addr.pub,
+ msg->local.sas_addr.pub,ATM_E164_LEN+1);
+ }
+ session_vcc = vcc->session ? vcc->session : vcc;
+ if (session_vcc->vpi || session_vcc->vci) break;
+ session_vcc->itf = msg->pvc.sap_addr.itf;
+ session_vcc->vpi = msg->pvc.sap_addr.vpi;
+ session_vcc->vci = msg->pvc.sap_addr.vci;
+ if (session_vcc->vpi || session_vcc->vci)
+ session_vcc->qos = msg->qos;
+ break;
+ case as_error:
+ clear_bit(ATM_VF_REGIS,&vcc->flags);
+ clear_bit(ATM_VF_READY,&vcc->flags);
+ sk->sk_err = -msg->reply;
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ break;
+ case as_indicate:
+ vcc = *(struct atm_vcc **) &msg->listen_vcc;
+ DPRINTK("as_indicate!!!\n");
+ lock_sock(sk);
+ if (sk_acceptq_is_full(sk)) {
+ sigd_enq(NULL,as_reject,vcc,NULL,NULL);
+ dev_kfree_skb(skb);
+ goto as_indicate_complete;
+ }
+ sk->sk_ack_backlog++;
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ DPRINTK("waking sk->sk_sleep 0x%p\n", sk->sk_sleep);
+ sk->sk_state_change(sk);
+as_indicate_complete:
+ release_sock(sk);
+ return 0;
+ case as_close:
+ set_bit(ATM_VF_RELEASED,&vcc->flags);
+ vcc_release_async(vcc, msg->reply);
+ goto out;
+ case as_modify:
+ modify_qos(vcc,msg);
+ break;
+ case as_addparty:
+ case as_dropparty:
+ sk->sk_err_soft = msg->reply; /* < 0 failure, otherwise ep_ref */
+ clear_bit(ATM_VF_WAITING, &vcc->flags);
+ break;
+ default:
+ printk(KERN_ALERT "sigd_send: bad message type %d\n",
+ (int) msg->type);
+ return -EINVAL;
+ }
+ sk->sk_state_change(sk);
+out:
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+
+void sigd_enq2(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc,const struct atm_qos *qos,int reply)
+{
+ struct sk_buff *skb;
+ struct atmsvc_msg *msg;
+ static unsigned session = 0;
+
+ DPRINTK("sigd_enq %d (0x%p)\n",(int) type,vcc);
+ while (!(skb = alloc_skb(sizeof(struct atmsvc_msg),GFP_KERNEL)))
+ schedule();
+ msg = (struct atmsvc_msg *) skb_put(skb,sizeof(struct atmsvc_msg));
+ memset(msg,0,sizeof(*msg));
+ msg->type = type;
+ *(struct atm_vcc **) &msg->vcc = vcc;
+ *(struct atm_vcc **) &msg->listen_vcc = listen_vcc;
+ msg->reply = reply;
+ if (qos) msg->qos = *qos;
+ if (vcc) msg->sap = vcc->sap;
+ if (svc) msg->svc = *svc;
+ if (vcc) msg->local = vcc->local;
+ if (pvc) msg->pvc = *pvc;
+ if (vcc) {
+ if (type == as_connect && test_bit(ATM_VF_SESSION, &vcc->flags))
+ msg->session = ++session;
+ /* every new pmp connect gets the next session number */
+ }
+ sigd_put_skb(skb);
+ if (vcc) set_bit(ATM_VF_REGIS,&vcc->flags);
+}
+
+
+void sigd_enq(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc)
+{
+ sigd_enq2(vcc,type,listen_vcc,pvc,svc,vcc ? &vcc->qos : NULL,0);
+ /* other ISP applications may use "reply" */
+}
+
+
+static void purge_vcc(struct atm_vcc *vcc)
+{
+ if (sk_atm(vcc)->sk_family == PF_ATMSVC &&
+ !test_bit(ATM_VF_META,&vcc->flags)) {
+ set_bit(ATM_VF_RELEASED,&vcc->flags);
+ vcc_release_async(vcc, -EUNATCH);
+ }
+}
+
+
+static void sigd_close(struct atm_vcc *vcc)
+{
+ struct hlist_node *node;
+ struct sock *s;
+ int i;
+
+ DPRINTK("sigd_close\n");
+ sigd = NULL;
+ if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+ printk(KERN_ERR "sigd_close: closing with requests pending\n");
+ skb_queue_purge(&sk_atm(vcc)->sk_receive_queue);
+
+ read_lock(&vcc_sklist_lock);
+ for(i = 0; i < VCC_HTABLE_SIZE; ++i) {
+ struct hlist_head *head = &vcc_hash[i];
+
+ sk_for_each(s, node, head) {
+ struct atm_vcc *vcc = atm_sk(s);
+
+ if (vcc->dev)
+ purge_vcc(vcc);
+ }
+ }
+ read_unlock(&vcc_sklist_lock);
+}
+
+
+static struct atmdev_ops sigd_dev_ops = {
+ .close = sigd_close,
+ .send = sigd_send
+};
+
+
+static struct atm_dev sigd_dev = {
+ .ops = &sigd_dev_ops,
+ .type = "sig",
+ .number = 999,
+ .lock = SPIN_LOCK_UNLOCKED
+};
+
+
+int sigd_attach(struct atm_vcc *vcc)
+{
+ if (sigd) return -EADDRINUSE;
+ DPRINTK("sigd_attach\n");
+ sigd = vcc;
+ vcc->dev = &sigd_dev;
+ vcc_insert_socket(sk_atm(vcc));
+ set_bit(ATM_VF_META,&vcc->flags);
+ set_bit(ATM_VF_READY,&vcc->flags);
+#ifdef WAIT_FOR_DEMON
+ wake_up(&sigd_sleep);
+#endif
+ return 0;
+}
diff --git a/net/atm/signaling.h b/net/atm/signaling.h
new file mode 100644
index 00000000000..434ead45571
--- /dev/null
+++ b/net/atm/signaling.h
@@ -0,0 +1,30 @@
+/* net/atm/signaling.h - ATM signaling */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#ifndef NET_ATM_SIGNALING_H
+#define NET_ATM_SIGNALING_H
+
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/atmsvc.h>
+
+
+extern struct atm_vcc *sigd; /* needed in svc_release */
+
+
+/*
+ * sigd_enq is a wrapper for sigd_enq2, covering the more common cases, and
+ * avoiding huge lists of null values.
+ */
+
+void sigd_enq2(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc,const struct atm_qos *qos,int reply);
+void sigd_enq(struct atm_vcc *vcc,enum atmsvc_msg_type type,
+ struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc,
+ const struct sockaddr_atmsvc *svc);
+int sigd_attach(struct atm_vcc *vcc);
+
+#endif
diff --git a/net/atm/svc.c b/net/atm/svc.c
new file mode 100644
index 00000000000..02f5374a51f
--- /dev/null
+++ b/net/atm/svc.c
@@ -0,0 +1,674 @@
+/* net/atm/svc.c - ATM SVC sockets */
+
+/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
+
+
+#include <linux/string.h>
+#include <linux/net.h> /* struct socket, struct proto_ops */
+#include <linux/errno.h> /* error codes */
+#include <linux/kernel.h> /* printk */
+#include <linux/skbuff.h>
+#include <linux/wait.h>
+#include <linux/sched.h> /* jiffies and HZ */
+#include <linux/fcntl.h> /* O_NONBLOCK */
+#include <linux/init.h>
+#include <linux/atm.h> /* ATM stuff */
+#include <linux/atmsap.h>
+#include <linux/atmsvc.h>
+#include <linux/atmdev.h>
+#include <linux/bitops.h>
+#include <net/sock.h> /* for sock_no_* */
+#include <asm/uaccess.h>
+
+#include "resources.h"
+#include "common.h" /* common for PVCs and SVCs */
+#include "signaling.h"
+#include "addr.h"
+
+
+#if 0
+#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
+#else
+#define DPRINTK(format,args...)
+#endif
+
+
+static int svc_create(struct socket *sock,int protocol);
+
+
+/*
+ * Note: since all this is still nicely synchronized with the signaling demon,
+ * there's no need to protect sleep loops with clis. If signaling is
+ * moved into the kernel, that would change.
+ */
+
+
+static int svc_shutdown(struct socket *sock,int how)
+{
+ return 0;
+}
+
+
+static void svc_disconnect(struct atm_vcc *vcc)
+{
+ DEFINE_WAIT(wait);
+ struct sk_buff *skb;
+ struct sock *sk = sk_atm(vcc);
+
+ DPRINTK("svc_disconnect %p\n",vcc);
+ if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(vcc,as_close,NULL,NULL,NULL);
+ while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ }
+ /* beware - socket is still in use by atmsigd until the last
+ as_indicate has been answered */
+ while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
+ atm_return(vcc, skb->truesize);
+ DPRINTK("LISTEN REL\n");
+ sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
+ dev_kfree_skb(skb);
+ }
+ clear_bit(ATM_VF_REGIS, &vcc->flags);
+ /* ... may retry later */
+}
+
+
+static int svc_release(struct socket *sock)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc;
+
+ if (sk) {
+ vcc = ATM_SD(sock);
+ DPRINTK("svc_release %p\n", vcc);
+ clear_bit(ATM_VF_READY, &vcc->flags);
+ /* VCC pointer is used as a reference, so we must not free it
+ (thereby subjecting it to re-use) before all pending connections
+ are closed */
+ svc_disconnect(vcc);
+ vcc_release(sock);
+ }
+ return 0;
+}
+
+
+static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
+ int sockaddr_len)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmsvc *addr;
+ struct atm_vcc *vcc;
+ int error;
+
+ if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
+ return -EINVAL;
+ lock_sock(sk);
+ if (sock->state == SS_CONNECTED) {
+ error = -EISCONN;
+ goto out;
+ }
+ if (sock->state != SS_UNCONNECTED) {
+ error = -EINVAL;
+ goto out;
+ }
+ vcc = ATM_SD(sock);
+ if (test_bit(ATM_VF_SESSION, &vcc->flags)) {
+ error = -EINVAL;
+ goto out;
+ }
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ if (addr->sas_family != AF_ATMSVC) {
+ error = -EAFNOSUPPORT;
+ goto out;
+ }
+ clear_bit(ATM_VF_BOUND,&vcc->flags);
+ /* failing rebind will kill old binding */
+ /* @@@ check memory (de)allocation on rebind */
+ if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ vcc->local = *addr;
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (!sk->sk_err)
+ set_bit(ATM_VF_BOUND,&vcc->flags);
+ error = -sk->sk_err;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
+ int sockaddr_len,int flags)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct sockaddr_atmsvc *addr;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ DPRINTK("svc_connect %p\n",vcc);
+ lock_sock(sk);
+ if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
+ error = -EINVAL;
+ goto out;
+ }
+
+ switch (sock->state) {
+ default:
+ error = -EINVAL;
+ goto out;
+ case SS_CONNECTED:
+ error = -EISCONN;
+ goto out;
+ case SS_CONNECTING:
+ if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
+ error = -EALREADY;
+ goto out;
+ }
+ sock->state = SS_UNCONNECTED;
+ if (sk->sk_err) {
+ error = -sk->sk_err;
+ goto out;
+ }
+ break;
+ case SS_UNCONNECTED:
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ if (addr->sas_family != AF_ATMSVC) {
+ error = -EAFNOSUPPORT;
+ goto out;
+ }
+ if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
+ error = -EBADFD;
+ goto out;
+ }
+ if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
+ vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (!vcc->qos.txtp.traffic_class &&
+ !vcc->qos.rxtp.traffic_class) {
+ error = -EINVAL;
+ goto out;
+ }
+ vcc->remote = *addr;
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
+ if (flags & O_NONBLOCK) {
+ finish_wait(sk->sk_sleep, &wait);
+ sock->state = SS_CONNECTING;
+ error = -EINPROGRESS;
+ goto out;
+ }
+ error = 0;
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ if (!signal_pending(current)) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ continue;
+ }
+ DPRINTK("*ABORT*\n");
+ /*
+ * This is tricky:
+ * Kernel ---close--> Demon
+ * Kernel <--close--- Demon
+ * or
+ * Kernel ---close--> Demon
+ * Kernel <--error--- Demon
+ * or
+ * Kernel ---close--> Demon
+ * Kernel <--okay---- Demon
+ * Kernel <--close--- Demon
+ */
+ sigd_enq(vcc,as_close,NULL,NULL,NULL);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ if (!sk->sk_err)
+ while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
+ && sigd) {
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ schedule();
+ }
+ clear_bit(ATM_VF_REGIS,&vcc->flags);
+ clear_bit(ATM_VF_RELEASED,&vcc->flags);
+ clear_bit(ATM_VF_CLOSE,&vcc->flags);
+ /* we're gone now but may connect later */
+ error = -EINTR;
+ break;
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (error)
+ goto out;
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (sk->sk_err) {
+ error = -sk->sk_err;
+ goto out;
+ }
+ }
+/*
+ * Not supported yet
+ *
+ * #ifndef CONFIG_SINGLE_SIGITF
+ */
+ vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
+ vcc->qos.txtp.pcr = 0;
+ vcc->qos.txtp.min_pcr = 0;
+/*
+ * #endif
+ */
+ if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
+ sock->state = SS_CONNECTED;
+ else
+ (void) svc_disconnect(vcc);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_listen(struct socket *sock,int backlog)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ DPRINTK("svc_listen %p\n",vcc);
+ lock_sock(sk);
+ /* let server handle listen on unbound sockets */
+ if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
+ error = -EINVAL;
+ goto out;
+ }
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ set_bit(ATM_VF_LISTEN,&vcc->flags);
+ sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
+ error = -sk->sk_err;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
+{
+ struct sock *sk = sock->sk;
+ struct sk_buff *skb;
+ struct atmsvc_msg *msg;
+ struct atm_vcc *old_vcc = ATM_SD(sock);
+ struct atm_vcc *new_vcc;
+ int error;
+
+ lock_sock(sk);
+
+ error = svc_create(newsock,0);
+ if (error)
+ goto out;
+
+ new_vcc = ATM_SD(newsock);
+
+ DPRINTK("svc_accept %p -> %p\n",old_vcc,new_vcc);
+ while (1) {
+ DEFINE_WAIT(wait);
+
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
+ sigd) {
+ if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
+ if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
+ error = -sk->sk_err;
+ break;
+ }
+ if (flags & O_NONBLOCK) {
+ error = -EAGAIN;
+ break;
+ }
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ if (signal_pending(current)) {
+ error = -ERESTARTSYS;
+ break;
+ }
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (error)
+ goto out;
+ if (!skb) {
+ error = -EUNATCH;
+ goto out;
+ }
+ msg = (struct atmsvc_msg *) skb->data;
+ new_vcc->qos = msg->qos;
+ set_bit(ATM_VF_HASQOS,&new_vcc->flags);
+ new_vcc->remote = msg->svc;
+ new_vcc->local = msg->local;
+ new_vcc->sap = msg->sap;
+ error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
+ msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
+ dev_kfree_skb(skb);
+ sk->sk_ack_backlog--;
+ if (error) {
+ sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
+ &old_vcc->qos,error);
+ error = error == -EAGAIN ? -EBUSY : error;
+ goto out;
+ }
+ /* wait should be short, so we ignore the non-blocking flag */
+ set_bit(ATM_VF_WAITING, &new_vcc->flags);
+ prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
+ while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
+ release_sock(sk);
+ schedule();
+ lock_sock(sk);
+ prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ if (!sk_atm(new_vcc)->sk_err)
+ break;
+ if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
+ error = -sk_atm(new_vcc)->sk_err;
+ goto out;
+ }
+ }
+ newsock->state = SS_CONNECTED;
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
+ int *sockaddr_len,int peer)
+{
+ struct sockaddr_atmsvc *addr;
+
+ *sockaddr_len = sizeof(struct sockaddr_atmsvc);
+ addr = (struct sockaddr_atmsvc *) sockaddr;
+ memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
+ sizeof(struct sockaddr_atmsvc));
+ return 0;
+}
+
+
+int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
+{
+ struct sock *sk = sk_atm(vcc);
+ DEFINE_WAIT(wait);
+
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
+ !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (!sigd) return -EUNATCH;
+ return -sk->sk_err;
+}
+
+
+static int svc_setsockopt(struct socket *sock, int level, int optname,
+ char __user *optval, int optlen)
+{
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int value, error = 0;
+
+ lock_sock(sk);
+ switch (optname) {
+ case SO_ATMSAP:
+ if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_from_user(&vcc->sap, optval, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ set_bit(ATM_VF_HASSAP, &vcc->flags);
+ break;
+ case SO_MULTIPOINT:
+ if (level != SOL_ATM || optlen != sizeof(int)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (get_user(value, (int __user *) optval)) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (value == 1) {
+ set_bit(ATM_VF_SESSION, &vcc->flags);
+ } else if (value == 0) {
+ clear_bit(ATM_VF_SESSION, &vcc->flags);
+ } else {
+ error = -EINVAL;
+ }
+ break;
+ default:
+ error = vcc_setsockopt(sock, level, optname,
+ optval, optlen);
+ }
+
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_getsockopt(struct socket *sock,int level,int optname,
+ char __user *optval,int __user *optlen)
+{
+ struct sock *sk = sock->sk;
+ int error = 0, len;
+
+ lock_sock(sk);
+ if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
+ error = vcc_getsockopt(sock, level, optname, optval, optlen);
+ goto out;
+ }
+ if (get_user(len, optlen)) {
+ error = -EFAULT;
+ goto out;
+ }
+ if (len != sizeof(struct atm_sap)) {
+ error = -EINVAL;
+ goto out;
+ }
+ if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
+ error = -EFAULT;
+ goto out;
+ }
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
+ int sockaddr_len, int flags)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq(vcc, as_addparty, NULL, NULL,
+ (struct sockaddr_atmsvc *) sockaddr);
+ if (flags & O_NONBLOCK) {
+ finish_wait(sk->sk_sleep, &wait);
+ error = -EINPROGRESS;
+ goto out;
+ }
+ DPRINTK("svc_addparty added wait queue\n");
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ error = xchg(&sk->sk_err_soft, 0);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_dropparty(struct socket *sock, int ep_ref)
+{
+ DEFINE_WAIT(wait);
+ struct sock *sk = sock->sk;
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int error;
+
+ lock_sock(sk);
+ set_bit(ATM_VF_WAITING, &vcc->flags);
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
+ while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
+ schedule();
+ prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ }
+ finish_wait(sk->sk_sleep, &wait);
+ if (!sigd) {
+ error = -EUNATCH;
+ goto out;
+ }
+ error = xchg(&sk->sk_err_soft, 0);
+out:
+ release_sock(sk);
+ return error;
+}
+
+
+static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ int error, ep_ref;
+ struct sockaddr_atmsvc sa;
+ struct atm_vcc *vcc = ATM_SD(sock);
+
+ switch (cmd) {
+ case ATM_ADDPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
+ return -EFAULT;
+ error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
+ break;
+ case ATM_DROPPARTY:
+ if (!test_bit(ATM_VF_SESSION, &vcc->flags))
+ return -EINVAL;
+ if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
+ return -EFAULT;
+ error = svc_dropparty(sock, ep_ref);
+ break;
+ default:
+ error = vcc_ioctl(sock, cmd, arg);
+ }
+
+ return error;
+}
+
+static struct proto_ops svc_proto_ops = {
+ .family = PF_ATMSVC,
+ .owner = THIS_MODULE,
+
+ .release = svc_release,
+ .bind = svc_bind,
+ .connect = svc_connect,
+ .socketpair = sock_no_socketpair,
+ .accept = svc_accept,
+ .getname = svc_getname,
+ .poll = vcc_poll,
+ .ioctl = svc_ioctl,
+ .listen = svc_listen,
+ .shutdown = svc_shutdown,
+ .setsockopt = svc_setsockopt,
+ .getsockopt = svc_getsockopt,
+ .sendmsg = vcc_sendmsg,
+ .recvmsg = vcc_recvmsg,
+ .mmap = sock_no_mmap,
+ .sendpage = sock_no_sendpage,
+};
+
+
+static int svc_create(struct socket *sock,int protocol)
+{
+ int error;
+
+ sock->ops = &svc_proto_ops;
+ error = vcc_create(sock, protocol, AF_ATMSVC);
+ if (error) return error;
+ ATM_SD(sock)->local.sas_family = AF_ATMSVC;
+ ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
+ return 0;
+}
+
+
+static struct net_proto_family svc_family_ops = {
+ .family = PF_ATMSVC,
+ .create = svc_create,
+ .owner = THIS_MODULE,
+};
+
+
+/*
+ * Initialize the ATM SVC protocol family
+ */
+
+int __init atmsvc_init(void)
+{
+ return sock_register(&svc_family_ops);
+}
+
+void atmsvc_exit(void)
+{
+ sock_unregister(PF_ATMSVC);
+}