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Diffstat (limited to 'net/sctp/socket.c')
-rw-r--r--net/sctp/socket.c206
1 files changed, 173 insertions, 33 deletions
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index a1b904529d5..b14a8f33e42 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -114,7 +114,7 @@ extern int sysctl_sctp_wmem[3];
static int sctp_memory_pressure;
static atomic_t sctp_memory_allocated;
-static atomic_t sctp_sockets_allocated;
+struct percpu_counter sctp_sockets_allocated;
static void sctp_enter_memory_pressure(struct sock *sk)
{
@@ -2404,9 +2404,9 @@ static int sctp_setsockopt_delayed_ack(struct sock *sk,
if (params.sack_delay == 0 && params.sack_freq == 0)
return 0;
} else if (optlen == sizeof(struct sctp_assoc_value)) {
- printk(KERN_WARNING "SCTP: Use of struct sctp_sack_info "
+ printk(KERN_WARNING "SCTP: Use of struct sctp_assoc_value "
"in delayed_ack socket option deprecated\n");
- printk(KERN_WARNING "SCTP: struct sctp_sack_info instead\n");
+ printk(KERN_WARNING "SCTP: Use struct sctp_sack_info instead\n");
if (copy_from_user(&params, optval, optlen))
return -EFAULT;
@@ -2778,32 +2778,77 @@ static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, int op
}
/*
- * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG)
- *
- * This socket option specifies the maximum size to put in any outgoing
- * SCTP chunk. If a message is larger than this size it will be
+ * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
+ * This option will get or set the maximum size to put in any outgoing
+ * SCTP DATA chunk. If a message is larger than this size it will be
* fragmented by SCTP into the specified size. Note that the underlying
* SCTP implementation may fragment into smaller sized chunks when the
* PMTU of the underlying association is smaller than the value set by
- * the user.
+ * the user. The default value for this option is '0' which indicates
+ * the user is NOT limiting fragmentation and only the PMTU will effect
+ * SCTP's choice of DATA chunk size. Note also that values set larger
+ * than the maximum size of an IP datagram will effectively let SCTP
+ * control fragmentation (i.e. the same as setting this option to 0).
+ *
+ * The following structure is used to access and modify this parameter:
+ *
+ * struct sctp_assoc_value {
+ * sctp_assoc_t assoc_id;
+ * uint32_t assoc_value;
+ * };
+ *
+ * assoc_id: This parameter is ignored for one-to-one style sockets.
+ * For one-to-many style sockets this parameter indicates which
+ * association the user is performing an action upon. Note that if
+ * this field's value is zero then the endpoints default value is
+ * changed (effecting future associations only).
+ * assoc_value: This parameter specifies the maximum size in bytes.
*/
static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optlen)
{
+ struct sctp_assoc_value params;
struct sctp_association *asoc;
struct sctp_sock *sp = sctp_sk(sk);
int val;
- if (optlen < sizeof(int))
+ if (optlen == sizeof(int)) {
+ printk(KERN_WARNING
+ "SCTP: Use of int in maxseg socket option deprecated\n");
+ printk(KERN_WARNING
+ "SCTP: Use struct sctp_assoc_value instead\n");
+ if (copy_from_user(&val, optval, optlen))
+ return -EFAULT;
+ params.assoc_id = 0;
+ } else if (optlen == sizeof(struct sctp_assoc_value)) {
+ if (copy_from_user(&params, optval, optlen))
+ return -EFAULT;
+ val = params.assoc_value;
+ } else
return -EINVAL;
- if (get_user(val, (int __user *)optval))
- return -EFAULT;
+
if ((val != 0) && ((val < 8) || (val > SCTP_MAX_CHUNK_LEN)))
return -EINVAL;
- sp->user_frag = val;
- /* Update the frag_point of the existing associations. */
- list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
- asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu);
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc && params.assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ if (asoc) {
+ if (val == 0) {
+ val = asoc->pathmtu;
+ val -= sp->pf->af->net_header_len;
+ val -= sizeof(struct sctphdr) +
+ sizeof(struct sctp_data_chunk);
+ }
+
+ asoc->frag_point = val;
+ } else {
+ sp->user_frag = val;
+
+ /* Update the frag_point of the existing associations. */
+ list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
+ asoc->frag_point = sctp_frag_point(sp, asoc->pathmtu);
+ }
}
return 0;
@@ -2965,14 +3010,21 @@ static int sctp_setsockopt_fragment_interleave(struct sock *sk,
}
/*
- * 7.1.25. Set or Get the sctp partial delivery point
+ * 8.1.21. Set or Get the SCTP Partial Delivery Point
* (SCTP_PARTIAL_DELIVERY_POINT)
+ *
* This option will set or get the SCTP partial delivery point. This
* point is the size of a message where the partial delivery API will be
* invoked to help free up rwnd space for the peer. Setting this to a
- * lower value will cause partial delivery's to happen more often. The
+ * lower value will cause partial deliveries to happen more often. The
* calls argument is an integer that sets or gets the partial delivery
- * point.
+ * point. Note also that the call will fail if the user attempts to set
+ * this value larger than the socket receive buffer size.
+ *
+ * Note that any single message having a length smaller than or equal to
+ * the SCTP partial delivery point will be delivered in one single read
+ * call as long as the user provided buffer is large enough to hold the
+ * message.
*/
static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
char __user *optval,
@@ -2985,6 +3037,12 @@ static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
if (get_user(val, (int __user *)optval))
return -EFAULT;
+ /* Note: We double the receive buffer from what the user sets
+ * it to be, also initial rwnd is based on rcvbuf/2.
+ */
+ if (val > (sk->sk_rcvbuf >> 1))
+ return -EINVAL;
+
sctp_sk(sk)->pd_point = val;
return 0; /* is this the right error code? */
@@ -3613,7 +3671,12 @@ SCTP_STATIC int sctp_init_sock(struct sock *sk)
sp->hmac = NULL;
SCTP_DBG_OBJCNT_INC(sock);
- atomic_inc(&sctp_sockets_allocated);
+ percpu_counter_inc(&sctp_sockets_allocated);
+
+ local_bh_disable();
+ sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
+ local_bh_enable();
+
return 0;
}
@@ -3627,7 +3690,10 @@ SCTP_STATIC void sctp_destroy_sock(struct sock *sk)
/* Release our hold on the endpoint. */
ep = sctp_sk(sk)->ep;
sctp_endpoint_free(ep);
- atomic_dec(&sctp_sockets_allocated);
+ percpu_counter_dec(&sctp_sockets_allocated);
+ local_bh_disable();
+ sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1);
+ local_bh_enable();
}
/* API 4.1.7 shutdown() - TCP Style Syntax
@@ -4168,9 +4234,9 @@ static int sctp_getsockopt_delayed_ack(struct sock *sk, int len,
if (copy_from_user(&params, optval, len))
return -EFAULT;
} else if (len == sizeof(struct sctp_assoc_value)) {
- printk(KERN_WARNING "SCTP: Use of struct sctp_sack_info "
+ printk(KERN_WARNING "SCTP: Use of struct sctp_assoc_value "
"in delayed_ack socket option deprecated\n");
- printk(KERN_WARNING "SCTP: struct sctp_sack_info instead\n");
+ printk(KERN_WARNING "SCTP: Use struct sctp_sack_info instead\n");
if (copy_from_user(&params, optval, len))
return -EFAULT;
} else
@@ -5092,30 +5158,69 @@ static int sctp_getsockopt_context(struct sock *sk, int len,
}
/*
- * 7.1.17 Set the maximum fragrmentation size (SCTP_MAXSEG)
- *
- * This socket option specifies the maximum size to put in any outgoing
- * SCTP chunk. If a message is larger than this size it will be
+ * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG)
+ * This option will get or set the maximum size to put in any outgoing
+ * SCTP DATA chunk. If a message is larger than this size it will be
* fragmented by SCTP into the specified size. Note that the underlying
* SCTP implementation may fragment into smaller sized chunks when the
* PMTU of the underlying association is smaller than the value set by
- * the user.
+ * the user. The default value for this option is '0' which indicates
+ * the user is NOT limiting fragmentation and only the PMTU will effect
+ * SCTP's choice of DATA chunk size. Note also that values set larger
+ * than the maximum size of an IP datagram will effectively let SCTP
+ * control fragmentation (i.e. the same as setting this option to 0).
+ *
+ * The following structure is used to access and modify this parameter:
+ *
+ * struct sctp_assoc_value {
+ * sctp_assoc_t assoc_id;
+ * uint32_t assoc_value;
+ * };
+ *
+ * assoc_id: This parameter is ignored for one-to-one style sockets.
+ * For one-to-many style sockets this parameter indicates which
+ * association the user is performing an action upon. Note that if
+ * this field's value is zero then the endpoints default value is
+ * changed (effecting future associations only).
+ * assoc_value: This parameter specifies the maximum size in bytes.
*/
static int sctp_getsockopt_maxseg(struct sock *sk, int len,
char __user *optval, int __user *optlen)
{
- int val;
+ struct sctp_assoc_value params;
+ struct sctp_association *asoc;
- if (len < sizeof(int))
+ if (len == sizeof(int)) {
+ printk(KERN_WARNING
+ "SCTP: Use of int in maxseg socket option deprecated\n");
+ printk(KERN_WARNING
+ "SCTP: Use struct sctp_assoc_value instead\n");
+ params.assoc_id = 0;
+ } else if (len >= sizeof(struct sctp_assoc_value)) {
+ len = sizeof(struct sctp_assoc_value);
+ if (copy_from_user(&params, optval, sizeof(params)))
+ return -EFAULT;
+ } else
return -EINVAL;
- len = sizeof(int);
+ asoc = sctp_id2assoc(sk, params.assoc_id);
+ if (!asoc && params.assoc_id && sctp_style(sk, UDP))
+ return -EINVAL;
+
+ if (asoc)
+ params.assoc_value = asoc->frag_point;
+ else
+ params.assoc_value = sctp_sk(sk)->user_frag;
- val = sctp_sk(sk)->user_frag;
if (put_user(len, optlen))
return -EFAULT;
- if (copy_to_user(optval, &val, len))
- return -EFAULT;
+ if (len == sizeof(int)) {
+ if (copy_to_user(optval, &params.assoc_value, len))
+ return -EFAULT;
+ } else {
+ if (copy_to_user(optval, &params, len))
+ return -EFAULT;
+ }
return 0;
}
@@ -5368,6 +5473,38 @@ num:
return 0;
}
+/*
+ * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER)
+ * This option gets the current number of associations that are attached
+ * to a one-to-many style socket. The option value is an uint32_t.
+ */
+static int sctp_getsockopt_assoc_number(struct sock *sk, int len,
+ char __user *optval, int __user *optlen)
+{
+ struct sctp_sock *sp = sctp_sk(sk);
+ struct sctp_association *asoc;
+ u32 val = 0;
+
+ if (sctp_style(sk, TCP))
+ return -EOPNOTSUPP;
+
+ if (len < sizeof(u32))
+ return -EINVAL;
+
+ len = sizeof(u32);
+
+ list_for_each_entry(asoc, &(sp->ep->asocs), asocs) {
+ val++;
+ }
+
+ if (put_user(len, optlen))
+ return -EFAULT;
+ if (copy_to_user(optval, &val, len))
+ return -EFAULT;
+
+ return 0;
+}
+
SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen)
{
@@ -5510,6 +5647,9 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
retval = sctp_getsockopt_local_auth_chunks(sk, len, optval,
optlen);
break;
+ case SCTP_GET_ASSOC_NUMBER:
+ retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen);
+ break;
default:
retval = -ENOPROTOOPT;
break;
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-26 13:18:07 +0000