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!

1 files changed, 4565 insertions, 0 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
new file mode 100644
index 000000000000..8a2cc75b3948
--- /dev/null
+++ b/security/selinux/hooks.c
@@ -0,0 +1,4565 @@
+/*
+ *  NSA Security-Enhanced Linux (SELinux) security module
+ *
+ *  This file contains the SELinux hook function implementations.
+ *
+ *  Authors:  Stephen Smalley, <sds@epoch.ncsc.mil>
+ *            Chris Vance, <cvance@nai.com>
+ *            Wayne Salamon, <wsalamon@nai.com>
+ *            James Morris <jmorris@redhat.com>
+ *
+ *  Copyright (C) 2001,2002 Networks Associates Technology, Inc.
+ *  Copyright (C) 2003 Red Hat, Inc., James Morris <jmorris@redhat.com>
+ *  Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
+ *                          <dgoeddel@trustedcs.com>
+ *
+ *	This program is free software; you can redistribute it and/or modify
+ *	it under the terms of the GNU General Public License version 2,
+ *      as published by the Free Software Foundation.
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/security.h>
+#include <linux/xattr.h>
+#include <linux/capability.h>
+#include <linux/unistd.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <linux/smp_lock.h>
+#include <linux/spinlock.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/ext2_fs.h>
+#include <linux/proc_fs.h>
+#include <linux/kd.h>
+#include <linux/netfilter_ipv4.h>
+#include <linux/netfilter_ipv6.h>
+#include <linux/tty.h>
+#include <net/icmp.h>
+#include <net/ip.h>		/* for sysctl_local_port_range[] */
+#include <net/tcp.h>		/* struct or_callable used in sock_rcv_skb */
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+#include <asm/ioctls.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>	/* for network interface checks */
+#include <linux/netlink.h>
+#include <linux/tcp.h>
+#include <linux/udp.h>
+#include <linux/quota.h>
+#include <linux/un.h>		/* for Unix socket types */
+#include <net/af_unix.h>	/* for Unix socket types */
+#include <linux/parser.h>
+#include <linux/nfs_mount.h>
+#include <net/ipv6.h>
+#include <linux/hugetlb.h>
+#include <linux/personality.h>
+#include <linux/sysctl.h>
+#include <linux/audit.h>
+
+#include "avc.h"
+#include "objsec.h"
+#include "netif.h"
+
+#define XATTR_SELINUX_SUFFIX "selinux"
+#define XATTR_NAME_SELINUX XATTR_SECURITY_PREFIX XATTR_SELINUX_SUFFIX
+
+extern unsigned int policydb_loaded_version;
+extern int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm);
+
+#ifdef CONFIG_SECURITY_SELINUX_DEVELOP
+int selinux_enforcing = 0;
+
+static int __init enforcing_setup(char *str)
+{
+	selinux_enforcing = simple_strtol(str,NULL,0);
+	return 1;
+}
+__setup("enforcing=", enforcing_setup);
+#endif
+
+#ifdef CONFIG_SECURITY_SELINUX_BOOTPARAM
+int selinux_enabled = CONFIG_SECURITY_SELINUX_BOOTPARAM_VALUE;
+
+static int __init selinux_enabled_setup(char *str)
+{
+	selinux_enabled = simple_strtol(str, NULL, 0);
+	return 1;
+}
+__setup("selinux=", selinux_enabled_setup);
+#endif
+
+/* Original (dummy) security module. */
+static struct security_operations *original_ops = NULL;
+
+/* Minimal support for a secondary security module,
+   just to allow the use of the dummy or capability modules.
+   The owlsm module can alternatively be used as a secondary
+   module as long as CONFIG_OWLSM_FD is not enabled. */
+static struct security_operations *secondary_ops = NULL;
+
+/* Lists of inode and superblock security structures initialized
+   before the policy was loaded. */
+static LIST_HEAD(superblock_security_head);
+static DEFINE_SPINLOCK(sb_security_lock);
+
+/* Allocate and free functions for each kind of security blob. */
+
+static int task_alloc_security(struct task_struct *task)
+{
+	struct task_security_struct *tsec;
+
+	tsec = kmalloc(sizeof(struct task_security_struct), GFP_KERNEL);
+	if (!tsec)
+		return -ENOMEM;
+
+	memset(tsec, 0, sizeof(struct task_security_struct));
+	tsec->magic = SELINUX_MAGIC;
+	tsec->task = task;
+	tsec->osid = tsec->sid = tsec->ptrace_sid = SECINITSID_UNLABELED;
+	task->security = tsec;
+
+	return 0;
+}
+
+static void task_free_security(struct task_struct *task)
+{
+	struct task_security_struct *tsec = task->security;
+
+	if (!tsec || tsec->magic != SELINUX_MAGIC)
+		return;
+
+	task->security = NULL;
+	kfree(tsec);
+}
+
+static int inode_alloc_security(struct inode *inode)
+{
+	struct task_security_struct *tsec = current->security;
+	struct inode_security_struct *isec;
+
+	isec = kmalloc(sizeof(struct inode_security_struct), GFP_KERNEL);
+	if (!isec)
+		return -ENOMEM;
+
+	memset(isec, 0, sizeof(struct inode_security_struct));
+	init_MUTEX(&isec->sem);
+	INIT_LIST_HEAD(&isec->list);
+	isec->magic = SELINUX_MAGIC;
+	isec->inode = inode;
+	isec->sid = SECINITSID_UNLABELED;
+	isec->sclass = SECCLASS_FILE;
+	if (tsec && tsec->magic == SELINUX_MAGIC)
+		isec->task_sid = tsec->sid;
+	else
+		isec->task_sid = SECINITSID_UNLABELED;
+	inode->i_security = isec;
+
+	return 0;
+}
+
+static void inode_free_security(struct inode *inode)
+{
+	struct inode_security_struct *isec = inode->i_security;
+	struct superblock_security_struct *sbsec = inode->i_sb->s_security;
+
+	if (!isec || isec->magic != SELINUX_MAGIC)
+		return;
+
+	spin_lock(&sbsec->isec_lock);
+	if (!list_empty(&isec->list))
+		list_del_init(&isec->list);
+	spin_unlock(&sbsec->isec_lock);
+
+	inode->i_security = NULL;
+	kfree(isec);
+}
+
+static int file_alloc_security(struct file *file)
+{
+	struct task_security_struct *tsec = current->security;
+	struct file_security_struct *fsec;
+
+	fsec = kmalloc(sizeof(struct file_security_struct), GFP_ATOMIC);
+	if (!fsec)
+		return -ENOMEM;
+
+	memset(fsec, 0, sizeof(struct file_security_struct));
+	fsec->magic = SELINUX_MAGIC;
+	fsec->file = file;
+	if (tsec && tsec->magic == SELINUX_MAGIC) {
+		fsec->sid = tsec->sid;
+		fsec->fown_sid = tsec->sid;
+	} else {
+		fsec->sid = SECINITSID_UNLABELED;
+		fsec->fown_sid = SECINITSID_UNLABELED;
+	}
+	file->f_security = fsec;
+
+	return 0;
+}
+
+static void file_free_security(struct file *file)
+{
+	struct file_security_struct *fsec = file->f_security;
+
+	if (!fsec || fsec->magic != SELINUX_MAGIC)
+		return;
+
+	file->f_security = NULL;
+	kfree(fsec);
+}
+
+static int superblock_alloc_security(struct super_block *sb)
+{
+	struct superblock_security_struct *sbsec;
+
+	sbsec = kmalloc(sizeof(struct superblock_security_struct), GFP_KERNEL);
+	if (!sbsec)
+		return -ENOMEM;
+
+	memset(sbsec, 0, sizeof(struct superblock_security_struct));
+	init_MUTEX(&sbsec->sem);
+	INIT_LIST_HEAD(&sbsec->list);
+	INIT_LIST_HEAD(&sbsec->isec_head);
+	spin_lock_init(&sbsec->isec_lock);
+	sbsec->magic = SELINUX_MAGIC;
+	sbsec->sb = sb;
+	sbsec->sid = SECINITSID_UNLABELED;
+	sbsec->def_sid = SECINITSID_FILE;
+	sb->s_security = sbsec;
+
+	return 0;
+}
+
+static void superblock_free_security(struct super_block *sb)
+{
+	struct superblock_security_struct *sbsec = sb->s_security;
+
+	if (!sbsec || sbsec->magic != SELINUX_MAGIC)
+		return;
+
+	spin_lock(&sb_security_lock);
+	if (!list_empty(&sbsec->list))
+		list_del_init(&sbsec->list);
+	spin_unlock(&sb_security_lock);
+
+	sb->s_security = NULL;
+	kfree(sbsec);
+}
+
+#ifdef CONFIG_SECURITY_NETWORK
+static int sk_alloc_security(struct sock *sk, int family, int priority)
+{
+	struct sk_security_struct *ssec;
+
+	if (family != PF_UNIX)
+		return 0;
+
+	ssec = kmalloc(sizeof(*ssec), priority);
+	if (!ssec)
+		return -ENOMEM;
+
+	memset(ssec, 0, sizeof(*ssec));
+	ssec->magic = SELINUX_MAGIC;
+	ssec->sk = sk;
+	ssec->peer_sid = SECINITSID_UNLABELED;
+	sk->sk_security = ssec;
+
+	return 0;
+}
+
+static void sk_free_security(struct sock *sk)
+{
+	struct sk_security_struct *ssec = sk->sk_security;
+
+	if (sk->sk_family != PF_UNIX || ssec->magic != SELINUX_MAGIC)
+		return;
+
+	sk->sk_security = NULL;
+	kfree(ssec);
+}
+#endif	/* CONFIG_SECURITY_NETWORK */
+
+/* The security server must be initialized before
+   any labeling or access decisions can be provided. */
+extern int ss_initialized;
+
+/* The file system's label must be initialized prior to use. */
+
+static char *labeling_behaviors[6] = {
+	"uses xattr",
+	"uses transition SIDs",
+	"uses task SIDs",
+	"uses genfs_contexts",
+	"not configured for labeling",
+	"uses mountpoint labeling",
+};
+
+static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dentry);
+
+static inline int inode_doinit(struct inode *inode)
+{
+	return inode_doinit_with_dentry(inode, NULL);
+}
+
+enum {
+	Opt_context = 1,
+	Opt_fscontext = 2,
+	Opt_defcontext = 4,
+};
+
+static match_table_t tokens = {
+	{Opt_context, "context=%s"},
+	{Opt_fscontext, "fscontext=%s"},
+	{Opt_defcontext, "defcontext=%s"},
+};
+
+#define SEL_MOUNT_FAIL_MSG "SELinux:  duplicate or incompatible mount options\n"
+
+static int try_context_mount(struct super_block *sb, void *data)
+{
+	char *context = NULL, *defcontext = NULL;
+	const char *name;
+	u32 sid;
+	int alloc = 0, rc = 0, seen = 0;
+	struct task_security_struct *tsec = current->security;
+	struct superblock_security_struct *sbsec = sb->s_security;
+
+	if (!data)
+		goto out;
+
+	name = sb->s_type->name;
+
+	if (sb->s_type->fs_flags & FS_BINARY_MOUNTDATA) {
+
+		/* NFS we understand. */
+		if (!strcmp(name, "nfs")) {
+			struct nfs_mount_data *d = data;
+
+			if (d->version <  NFS_MOUNT_VERSION)
+				goto out;
+
+			if (d->context[0]) {
+				context = d->context;
+				seen |= Opt_context;
+			}
+		} else
+			goto out;
+
+	} else {
+		/* Standard string-based options. */
+		char *p, *options = data;
+
+		while ((p = strsep(&options, ",")) != NULL) {
+			int token;
+			substring_t args[MAX_OPT_ARGS];
+
+			if (!*p)
+				continue;
+
+			token = match_token(p, tokens, args);
+
+			switch (token) {
+			case Opt_context:
+				if (seen) {
+					rc = -EINVAL;
+					printk(KERN_WARNING SEL_MOUNT_FAIL_MSG);
+					goto out_free;
+				}
+				context = match_strdup(&args[0]);
+				if (!context) {
+					rc = -ENOMEM;
+					goto out_free;
+				}
+				if (!alloc)
+					alloc = 1;
+				seen |= Opt_context;
+				break;
+
+			case Opt_fscontext:
+				if (seen & (Opt_context|Opt_fscontext)) {
+					rc = -EINVAL;
+					printk(KERN_WARNING SEL_MOUNT_FAIL_MSG);
+					goto out_free;
+				}
+				context = match_strdup(&args[0]);
+				if (!context) {
+					rc = -ENOMEM;
+					goto out_free;
+				}
+				if (!alloc)
+					alloc = 1;
+				seen |= Opt_fscontext;
+				break;
+
+			case Opt_defcontext:
+				if (sbsec->behavior != SECURITY_FS_USE_XATTR) {
+					rc = -EINVAL;
+					printk(KERN_WARNING "SELinux:  "
+					       "defcontext option is invalid "
+					       "for this filesystem type\n");
+					goto out_free;
+				}
+				if (seen & (Opt_context|Opt_defcontext)) {
+					rc = -EINVAL;
+					printk(KERN_WARNING SEL_MOUNT_FAIL_MSG);
+					goto out_free;
+				}
+				defcontext = match_strdup(&args[0]);
+				if (!defcontext) {
+					rc = -ENOMEM;
+					goto out_free;
+				}
+				if (!alloc)
+					alloc = 1;
+				seen |= Opt_defcontext;
+				break;
+
+			default:
+				rc = -EINVAL;
+				printk(KERN_WARNING "SELinux:  unknown mount "
+				       "option\n");
+				goto out_free;
+
+			}
+		}
+	}
+
+	if (!seen)
+		goto out;
+
+	if (context) {
+		rc = security_context_to_sid(context, strlen(context), &sid);
+		if (rc) {
+			printk(KERN_WARNING "SELinux: security_context_to_sid"
+			       "(%s) failed for (dev %s, type %s) errno=%d\n",
+			       context, sb->s_id, name, rc);
+			goto out_free;
+		}
+
+		rc = avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
+		                  FILESYSTEM__RELABELFROM, NULL);
+		if (rc)
+			goto out_free;
+
+		rc = avc_has_perm(tsec->sid, sid, SECCLASS_FILESYSTEM,
+		                  FILESYSTEM__RELABELTO, NULL);
+		if (rc)
+			goto out_free;
+
+		sbsec->sid = sid;
+
+		if (seen & Opt_context)
+			sbsec->behavior = SECURITY_FS_USE_MNTPOINT;
+	}
+
+	if (defcontext) {
+		rc = security_context_to_sid(defcontext, strlen(defcontext), &sid);
+		if (rc) {
+			printk(KERN_WARNING "SELinux: security_context_to_sid"
+			       "(%s) failed for (dev %s, type %s) errno=%d\n",
+			       defcontext, sb->s_id, name, rc);
+			goto out_free;
+		}
+
+		if (sid == sbsec->def_sid)
+			goto out_free;
+
+		rc = avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
+				  FILESYSTEM__RELABELFROM, NULL);
+		if (rc)
+			goto out_free;
+
+		rc = avc_has_perm(sid, sbsec->sid, SECCLASS_FILESYSTEM,
+				  FILESYSTEM__ASSOCIATE, NULL);
+		if (rc)
+			goto out_free;
+
+		sbsec->def_sid = sid;
+	}
+
+out_free:
+	if (alloc) {
+		kfree(context);
+		kfree(defcontext);
+	}
+out:
+	return rc;
+}
+
+static int superblock_doinit(struct super_block *sb, void *data)
+{
+	struct superblock_security_struct *sbsec = sb->s_security;
+	struct dentry *root = sb->s_root;
+	struct inode *inode = root->d_inode;
+	int rc = 0;
+
+	down(&sbsec->sem);
+	if (sbsec->initialized)
+		goto out;
+
+	if (!ss_initialized) {
+		/* Defer initialization until selinux_complete_init,
+		   after the initial policy is loaded and the security
+		   server is ready to handle calls. */
+		spin_lock(&sb_security_lock);
+		if (list_empty(&sbsec->list))
+			list_add(&sbsec->list, &superblock_security_head);
+		spin_unlock(&sb_security_lock);
+		goto out;
+	}
+
+	/* Determine the labeling behavior to use for this filesystem type. */
+	rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
+	if (rc) {
+		printk(KERN_WARNING "%s:  security_fs_use(%s) returned %d\n",
+		       __FUNCTION__, sb->s_type->name, rc);
+		goto out;
+	}
+
+	rc = try_context_mount(sb, data);
+	if (rc)
+		goto out;
+
+	if (sbsec->behavior == SECURITY_FS_USE_XATTR) {
+		/* Make sure that the xattr handler exists and that no
+		   error other than -ENODATA is returned by getxattr on
+		   the root directory.  -ENODATA is ok, as this may be
+		   the first boot of the SELinux kernel before we have
+		   assigned xattr values to the filesystem. */
+		if (!inode->i_op->getxattr) {
+			printk(KERN_WARNING "SELinux: (dev %s, type %s) has no "
+			       "xattr support\n", sb->s_id, sb->s_type->name);
+			rc = -EOPNOTSUPP;
+			goto out;
+		}
+		rc = inode->i_op->getxattr(root, XATTR_NAME_SELINUX, NULL, 0);
+		if (rc < 0 && rc != -ENODATA) {
+			if (rc == -EOPNOTSUPP)
+				printk(KERN_WARNING "SELinux: (dev %s, type "
+				       "%s) has no security xattr handler\n",
+				       sb->s_id, sb->s_type->name);
+			else
+				printk(KERN_WARNING "SELinux: (dev %s, type "
+				       "%s) getxattr errno %d\n", sb->s_id,
+				       sb->s_type->name, -rc);
+			goto out;
+		}
+	}
+
+	if (strcmp(sb->s_type->name, "proc") == 0)
+		sbsec->proc = 1;
+
+	sbsec->initialized = 1;
+
+	if (sbsec->behavior > ARRAY_SIZE(labeling_behaviors)) {
+		printk(KERN_INFO "SELinux: initialized (dev %s, type %s), unknown behavior\n",
+		       sb->s_id, sb->s_type->name);
+	}
+	else {
+		printk(KERN_INFO "SELinux: initialized (dev %s, type %s), %s\n",
+		       sb->s_id, sb->s_type->name,
+		       labeling_behaviors[sbsec->behavior-1]);
+	}
+
+	/* Initialize the root inode. */
+	rc = inode_doinit_with_dentry(sb->s_root->d_inode, sb->s_root);
+
+	/* Initialize any other inodes associated with the superblock, e.g.
+	   inodes created prior to initial policy load or inodes created
+	   during get_sb by a pseudo filesystem that directly
+	   populates itself. */
+	spin_lock(&sbsec->isec_lock);
+next_inode:
+	if (!list_empty(&sbsec->isec_head)) {
+		struct inode_security_struct *isec =
+				list_entry(sbsec->isec_head.next,
+				           struct inode_security_struct, list);
+		struct inode *inode = isec->inode;
+		spin_unlock(&sbsec->isec_lock);
+		inode = igrab(inode);
+		if (inode) {
+			if (!IS_PRIVATE (inode))
+				inode_doinit(inode);
+			iput(inode);
+		}
+		spin_lock(&sbsec->isec_lock);
+		list_del_init(&isec->list);
+		goto next_inode;
+	}
+	spin_unlock(&sbsec->isec_lock);
+out:
+	up(&sbsec->sem);
+	return rc;
+}
+
+static inline u16 inode_mode_to_security_class(umode_t mode)
+{
+	switch (mode & S_IFMT) {
+	case S_IFSOCK:
+		return SECCLASS_SOCK_FILE;
+	case S_IFLNK:
+		return SECCLASS_LNK_FILE;
+	case S_IFREG:
+		return SECCLASS_FILE;
+	case S_IFBLK:
+		return SECCLASS_BLK_FILE;
+	case S_IFDIR:
+		return SECCLASS_DIR;
+	case S_IFCHR:
+		return SECCLASS_CHR_FILE;
+	case S_IFIFO:
+		return SECCLASS_FIFO_FILE;
+
+	}
+
+	return SECCLASS_FILE;
+}
+
+static inline u16 socket_type_to_security_class(int family, int type, int protocol)
+{
+	switch (family) {
+	case PF_UNIX:
+		switch (type) {
+		case SOCK_STREAM:
+		case SOCK_SEQPACKET:
+			return SECCLASS_UNIX_STREAM_SOCKET;
+		case SOCK_DGRAM:
+			return SECCLASS_UNIX_DGRAM_SOCKET;
+		}
+		break;
+	case PF_INET:
+	case PF_INET6:
+		switch (type) {
+		case SOCK_STREAM:
+			return SECCLASS_TCP_SOCKET;
+		case SOCK_DGRAM:
+			return SECCLASS_UDP_SOCKET;
+		case SOCK_RAW:
+			return SECCLASS_RAWIP_SOCKET;
+		}
+		break;
+	case PF_NETLINK:
+		switch (protocol) {
+		case NETLINK_ROUTE:
+			return SECCLASS_NETLINK_ROUTE_SOCKET;
+		case NETLINK_FIREWALL:
+			return SECCLASS_NETLINK_FIREWALL_SOCKET;
+		case NETLINK_TCPDIAG:
+			return SECCLASS_NETLINK_TCPDIAG_SOCKET;
+		case NETLINK_NFLOG:
+			return SECCLASS_NETLINK_NFLOG_SOCKET;
+		case NETLINK_XFRM:
+			return SECCLASS_NETLINK_XFRM_SOCKET;
+		case NETLINK_SELINUX:
+			return SECCLASS_NETLINK_SELINUX_SOCKET;
+		case NETLINK_AUDIT:
+			return SECCLASS_NETLINK_AUDIT_SOCKET;
+		case NETLINK_IP6_FW:
+			return SECCLASS_NETLINK_IP6FW_SOCKET;
+		case NETLINK_DNRTMSG:
+			return SECCLASS_NETLINK_DNRT_SOCKET;
+		default:
+			return SECCLASS_NETLINK_SOCKET;
+		}
+	case PF_PACKET:
+		return SECCLASS_PACKET_SOCKET;
+	case PF_KEY:
+		return SECCLASS_KEY_SOCKET;
+	}
+
+	return SECCLASS_SOCKET;
+}
+
+#ifdef CONFIG_PROC_FS
+static int selinux_proc_get_sid(struct proc_dir_entry *de,
+				u16 tclass,
+				u32 *sid)
+{
+	int buflen, rc;
+	char *buffer, *path, *end;
+
+	buffer = (char*)__get_free_page(GFP_KERNEL);
+	if (!buffer)
+		return -ENOMEM;
+
+	buflen = PAGE_SIZE;
+	end = buffer+buflen;
+	*--end = '\0';
+	buflen--;
+	path = end-1;
+	*path = '/';
+	while (de && de != de->parent) {
+		buflen -= de->namelen + 1;
+		if (buflen < 0)
+			break;
+		end -= de->namelen;
+		memcpy(end, de->name, de->namelen);
+		*--end = '/';
+		path = end;
+		de = de->parent;
+	}
+	rc = security_genfs_sid("proc", path, tclass, sid);
+	free_page((unsigned long)buffer);
+	return rc;
+}
+#else
+static int selinux_proc_get_sid(struct proc_dir_entry *de,
+				u16 tclass,
+				u32 *sid)
+{
+	return -EINVAL;
+}
+#endif
+
+/* The inode's security attributes must be initialized before first use. */
+static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dentry)
+{
+	struct superblock_security_struct *sbsec = NULL;
+	struct inode_security_struct *isec = inode->i_security;
+	u32 sid;
+	struct dentry *dentry;
+#define INITCONTEXTLEN 255
+	char *context = NULL;
+	unsigned len = 0;
+	int rc = 0;
+	int hold_sem = 0;
+
+	if (isec->initialized)
+		goto out;
+
+	down(&isec->sem);
+	hold_sem = 1;
+	if (isec->initialized)
+		goto out;
+
+	sbsec = inode->i_sb->s_security;
+	if (!sbsec->initialized) {
+		/* Defer initialization until selinux_complete_init,
+		   after the initial policy is loaded and the security
+		   server is ready to handle calls. */
+		spin_lock(&sbsec->isec_lock);
+		if (list_empty(&isec->list))
+			list_add(&isec->list, &sbsec->isec_head);
+		spin_unlock(&sbsec->isec_lock);
+		goto out;
+	}
+
+	switch (sbsec->behavior) {
+	case SECURITY_FS_USE_XATTR:
+		if (!inode->i_op->getxattr) {
+			isec->sid = sbsec->def_sid;
+			break;
+		}
+
+		/* Need a dentry, since the xattr API requires one.
+		   Life would be simpler if we could just pass the inode. */
+		if (opt_dentry) {
+			/* Called from d_instantiate or d_splice_alias. */
+			dentry = dget(opt_dentry);
+		} else {
+			/* Called from selinux_complete_init, try to find a dentry. */
+			dentry = d_find_alias(inode);
+		}
+		if (!dentry) {
+			printk(KERN_WARNING "%s:  no dentry for dev=%s "
+			       "ino=%ld\n", __FUNCTION__, inode->i_sb->s_id,
+			       inode->i_ino);
+			goto out;
+		}
+
+		len = INITCONTEXTLEN;
+		context = kmalloc(len, GFP_KERNEL);
+		if (!context) {
+			rc = -ENOMEM;
+			dput(dentry);
+			goto out;
+		}
+		rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX,
+					   context, len);
+		if (rc == -ERANGE) {
+			/* Need a larger buffer.  Query for the right size. */
+			rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX,
+						   NULL, 0);
+			if (rc < 0) {
+				dput(dentry);
+				goto out;
+			}
+			kfree(context);
+			len = rc;
+			context = kmalloc(len, GFP_KERNEL);
+			if (!context) {
+				rc = -ENOMEM;
+				dput(dentry);
+				goto out;
+			}
+			rc = inode->i_op->getxattr(dentry,
+						   XATTR_NAME_SELINUX,
+						   context, len);
+		}
+		dput(dentry);
+		if (rc < 0) {
+			if (rc != -ENODATA) {
+				printk(KERN_WARNING "%s:  getxattr returned "
+				       "%d for dev=%s ino=%ld\n", __FUNCTION__,
+				       -rc, inode->i_sb->s_id, inode->i_ino);
+				kfree(context);
+				goto out;
+			}
+			/* Map ENODATA to the default file SID */
+			sid = sbsec->def_sid;
+			rc = 0;
+		} else {
+			rc = security_context_to_sid(context, rc, &sid);
+			if (rc) {
+				printk(KERN_WARNING "%s:  context_to_sid(%s) "
+				       "returned %d for dev=%s ino=%ld\n",
+				       __FUNCTION__, context, -rc,
+				       inode->i_sb->s_id, inode->i_ino);
+				kfree(context);
+				/* Leave with the unlabeled SID */
+				rc = 0;
+				break;
+			}
+		}
+		kfree(context);
+		isec->sid = sid;
+		break;
+	case SECURITY_FS_USE_TASK:
+		isec->sid = isec->task_sid;
+		break;
+	case SECURITY_FS_USE_TRANS:
+		/* Default to the fs SID. */
+		isec->sid = sbsec->sid;
+
+		/* Try to obtain a transition SID. */
+		isec->sclass = inode_mode_to_security_class(inode->i_mode);
+		rc = security_transition_sid(isec->task_sid,
+					     sbsec->sid,
+					     isec->sclass,
+					     &sid);
+		if (rc)
+			goto out;
+		isec->sid = sid;
+		break;
+	default:
+		/* Default to the fs SID. */
+		isec->sid = sbsec->sid;
+
+		if (sbsec->proc) {
+			struct proc_inode *proci = PROC_I(inode);
+			if (proci->pde) {
+				isec->sclass = inode_mode_to_security_class(inode->i_mode);
+				rc = selinux_proc_get_sid(proci->pde,
+							  isec->sclass,
+							  &sid);
+				if (rc)
+					goto out;
+				isec->sid = sid;
+			}
+		}
+		break;
+	}
+
+	isec->initialized = 1;
+
+out:
+	if (isec->sclass == SECCLASS_FILE)
+		isec->sclass = inode_mode_to_security_class(inode->i_mode);
+
+	if (hold_sem)
+		up(&isec->sem);
+	return rc;
+}
+
+/* Convert a Linux signal to an access vector. */
+static inline u32 signal_to_av(int sig)
+{
+	u32 perm = 0;
+
+	switch (sig) {
+	case SIGCHLD:
+		/* Commonly granted from child to parent. */
+		perm = PROCESS__SIGCHLD;
+		break;
+	case SIGKILL:
+		/* Cannot be caught or ignored */
+		perm = PROCESS__SIGKILL;
+		break;
+	case SIGSTOP:
+		/* Cannot be caught or ignored */
+		perm = PROCESS__SIGSTOP;
+		break;
+	default:
+		/* All other signals. */
+		perm = PROCESS__SIGNAL;
+		break;
+	}
+
+	return perm;
+}
+
+/* Check permission betweeen a pair of tasks, e.g. signal checks,
+   fork check, ptrace check, etc. */
+static int task_has_perm(struct task_struct *tsk1,
+			 struct task_struct *tsk2,
+			 u32 perms)
+{
+	struct task_security_struct *tsec1, *tsec2;
+
+	tsec1 = tsk1->security;
+	tsec2 = tsk2->security;
+	return avc_has_perm(tsec1->sid, tsec2->sid,
+			    SECCLASS_PROCESS, perms, NULL);
+}
+
+/* Check whether a task is allowed to use a capability. */
+static int task_has_capability(struct task_struct *tsk,
+			       int cap)
+{
+	struct task_security_struct *tsec;
+	struct avc_audit_data ad;
+
+	tsec = tsk->security;
+
+	AVC_AUDIT_DATA_INIT(&ad,CAP);
+	ad.tsk = tsk;
+	ad.u.cap = cap;
+
+	return avc_has_perm(tsec->sid, tsec->sid,
+			    SECCLASS_CAPABILITY, CAP_TO_MASK(cap), &ad);
+}
+
+/* Check whether a task is allowed to use a system operation. */
+static int task_has_system(struct task_struct *tsk,
+			   u32 perms)
+{
+	struct task_security_struct *tsec;
+
+	tsec = tsk->security;
+
+	return avc_has_perm(tsec->sid, SECINITSID_KERNEL,
+			    SECCLASS_SYSTEM, perms, NULL);
+}
+
+/* Check whether a task has a particular permission to an inode.
+   The 'adp' parameter is optional and allows other audit
+   data to be passed (e.g. the dentry). */
+static int inode_has_perm(struct task_struct *tsk,
+			  struct inode *inode,
+			  u32 perms,
+			  struct avc_audit_data *adp)
+{
+	struct task_security_struct *tsec;
+	struct inode_security_struct *isec;
+	struct avc_audit_data ad;
+
+	tsec = tsk->security;
+	isec = inode->i_security;
+
+	if (!adp) {
+		adp = &ad;
+		AVC_AUDIT_DATA_INIT(&ad, FS);
+		ad.u.fs.inode = inode;
+	}
+
+	return avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, adp);
+}
+
+/* Same as inode_has_perm, but pass explicit audit data containing
+   the dentry to help the auditing code to more easily generate the
+   pathname if needed. */
+static inline int dentry_has_perm(struct task_struct *tsk,
+				  struct vfsmount *mnt,
+				  struct dentry *dentry,
+				  u32 av)
+{
+	struct inode *inode = dentry->d_inode;
+	struct avc_audit_data ad;
+	AVC_AUDIT_DATA_INIT(&ad,FS);
+	ad.u.fs.mnt = mnt;
+	ad.u.fs.dentry = dentry;
+	return inode_has_perm(tsk, inode, av, &ad);
+}
+
+/* Check whether a task can use an open file descriptor to
+   access an inode in a given way.  Check access to the
+   descriptor itself, and then use dentry_has_perm to
+   check a particular permission to the file.
+   Access to the descriptor is implicitly granted if it
+   has the same SID as the process.  If av is zero, then
+   access to the file is not checked, e.g. for cases
+   where only the descriptor is affected like seek. */
+static inline int file_has_perm(struct task_struct *tsk,
+				struct file *file,
+				u32 av)
+{
+	struct task_security_struct *tsec = tsk->security;
+	struct file_security_struct *fsec = file->f_security;
+	struct vfsmount *mnt = file->f_vfsmnt;
+	struct dentry *dentry = file->f_dentry;
+	struct inode *inode = dentry->d_inode;
+	struct avc_audit_data ad;
+	int rc;
+
+	AVC_AUDIT_DATA_INIT(&ad, FS);
+	ad.u.fs.mnt = mnt;
+	ad.u.fs.dentry = dentry;
+
+	if (tsec->sid != fsec->sid) {
+		rc = avc_has_perm(tsec->sid, fsec->sid,
+				  SECCLASS_FD,
+				  FD__USE,
+				  &ad);
+		if (rc)
+			return rc;
+	}
+
+	/* av is zero if only checking access to the descriptor. */
+	if (av)
+		return inode_has_perm(tsk, inode, av, &ad);
+
+	return 0;
+}
+
+/* Check whether a task can create a file. */
+static int may_create(struct inode *dir,
+		      struct dentry *dentry,
+		      u16 tclass)
+{
+	struct task_security_struct *tsec;
+	struct inode_security_struct *dsec;
+	struct superblock_security_struct *sbsec;
+	u32 newsid;
+	struct avc_audit_data ad;
+	int rc;
+
+	tsec = current->security;
+	dsec = dir->i_security;
+	sbsec = dir->i_sb->s_security;
+
+	AVC_AUDIT_DATA_INIT(&ad, FS);
+	ad.u.fs.dentry = dentry;
+
+	rc = avc_has_perm(tsec->sid, dsec->sid, SECCLASS_DIR,
+			  DIR__ADD_NAME | DIR__SEARCH,
+			  &ad);
+	if (rc)
+		return rc;
+
+	if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
+		newsid = tsec->create_sid;
+	} else {
+		rc = security_transition_sid(tsec->sid, dsec->sid, tclass,
+					     &newsid);
+		if (rc)
+			return rc;
+	}
+
+	rc = avc_has_perm(tsec->sid, newsid, tclass, FILE__CREATE, &ad);
+	if (rc)
+		return rc;
+
+	return avc_has_perm(newsid, sbsec->sid,
+			    SECCLASS_FILESYSTEM,
+			    FILESYSTEM__ASSOCIATE, &ad);
+}
+
+#define MAY_LINK   0
+#define MAY_UNLINK 1
+#define MAY_RMDIR  2
+
+/* Check whether a task can link, unlink, or rmdir a file/directory. */
+static int may_link(struct inode *dir,
+		    struct dentry *dentry,
+		    int kind)
+
+{
+	struct task_security_struct *tsec;
+	struct inode_security_struct *dsec, *isec;
+	struct avc_audit_data ad;
+	u32 av;
+	int rc;
+
+	tsec = current->security;
+	dsec = dir->i_security;
+	isec = dentry->d_inode->i_security;
+
+	AVC_AUDIT_DATA_INIT(&ad, FS);
+	ad.u.fs.dentry = dentry;
+
+	av = DIR__SEARCH;
+	av |= (kind ? DIR__REMOVE_NAME : DIR__ADD_NAME);
+	rc = avc_has_perm(tsec->sid, dsec->sid, SECCLASS_DIR, av, &ad);
+	if (rc)
+		return rc;
+
+	switch (kind) {
+	case MAY_LINK:
+		av = FILE__LINK;
+		break;
+	case MAY_UNLINK:
+		av = FILE__UNLINK;
+		break;
+	case MAY_RMDIR:
+		av = DIR__RMDIR;
+		break;
+	default:
+		printk(KERN_WARNING "may_link:  unrecognized kind %d\n", kind);
+		return 0;
+	}
+
+	rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass, av, &ad);
+	return rc;
+}
+
+static inline int may_rename(struct inode *old_dir,
+			     struct dentry *old_dentry,
+			     struct inode *new_dir,
+			     struct dentry *new_dentry)
+{
+	struct task_security_struct *tsec;
+	struct inode_security_struct *old_dsec, *new_dsec, *old_isec, *new_isec;
+	struct avc_audit_data ad;
+	u32 av;
+	int old_is_dir, new_is_dir;
+	int rc;
+
+	tsec = current->security;
+	old_dsec = old_dir->i_security;
+	old_isec = old_dentry->d_inode->i_security;
+	old_is_dir = S_ISDIR(old_dentry->d_inode->i_mode);
+	new_dsec = new_dir->i_security;
+
+	AVC_AUDIT_DATA_INIT(&ad, FS);
+
+	ad.u.fs.dentry = old_dentry;
+	rc = avc_has_perm(tsec->sid, old_dsec->sid, SECCLASS_DIR,
+			  DIR__REMOVE_NAME | DIR__SEARCH, &ad);
+	if (rc)
+		return rc;
+	rc = avc_has_perm(tsec->sid, old_isec->sid,
+			  old_isec->sclass, FILE__RENAME, &ad);
+	if (rc)
+		return rc;
+	if (old_is_dir && new_dir != old_dir) {
+		rc = avc_has_perm(tsec->sid, old_isec->sid,
+				  old_isec->sclass, DIR__REPARENT, &ad);
+		if (rc)
+			return rc;
+	}
+
+	ad.u.fs.dentry = new_dentry;
+	av = DIR__ADD_NAME | DIR__SEARCH;
+	if (new_dentry->d_inode)
+		av |= DIR__REMOVE_NAME;
+	rc = avc_has_perm(tsec->sid, new_dsec->sid, SECCLASS_DIR, av, &ad);
+	if (rc)
+		return rc;
+	if (new_dentry->d_inode) {
+		new_isec = new_dentry->d_inode->i_security;
+		new_is_dir = S_ISDIR(new_dentry->d_inode->i_mode);
+		rc = avc_has_perm(tsec->sid, new_isec->sid,
+				  new_isec->sclass,
+				  (new_is_dir ? DIR__RMDIR : FILE__UNLINK), &ad);
+		if (rc)
+			return rc;
+	}
+
+	return 0;
+}
+
+/* Check whether a task can perform a filesystem operation. */
+static int superblock_has_perm(struct task_struct *tsk,
+			       struct super_block *sb,
+			       u32 perms,
+			       struct avc_audit_data *ad)
+{
+	struct task_security_struct *tsec;
+	struct superblock_security_struct *sbsec;
+
+	tsec = tsk->security;
+	sbsec = sb->s_security;
+	return avc_has_perm(tsec->sid, sbsec->sid, SECCLASS_FILESYSTEM,
+			    perms, ad);
+}
+
+/* Convert a Linux mode and permission mask to an access vector. */
+static inline u32 file_mask_to_av(int mode, int mask)
+{
+	u32 av = 0;
+
+	if ((mode & S_IFMT) != S_IFDIR) {
+		if (mask & MAY_EXEC)
+			av |= FILE__EXECUTE;
+		if (mask & MAY_READ)
+			av |= FILE__READ;
+
+		if (mask & MAY_APPEND)
+			av |= FILE__APPEND;
+		else if (mask & MAY_WRITE)
+			av |= FILE__WRITE;
+
+	} else {
+		if (mask & MAY_EXEC)
+			av |= DIR__SEARCH;
+		if (mask & MAY_WRITE)
+			av |= DIR__WRITE;
+		if (mask & MAY_READ)
+			av |= DIR__READ;
+	}
+
+	return av;
+}
+
+/* Convert a Linux file to an access vector. */
+static inline u32 file_to_av(struct file *file)
+{
+	u32 av = 0;
+
+	if (file->f_mode & FMODE_READ)
+		av |= FILE__READ;
+	if (file->f_mode & FMODE_WRITE) {
+		if (file->f_flags & O_APPEND)
+			av |= FILE__APPEND;
+		else
+			av |= FILE__WRITE;
+	}
+
+	return av;
+}
+
+/* Set an inode's SID to a specified value. */
+static int inode_security_set_sid(struct inode *inode, u32 sid)
+{
+	struct inode_security_struct *isec = inode->i_security;
+	struct superblock_security_struct *sbsec = inode->i_sb->s_security;
+
+	if (!sbsec->initialized) {
+		/* Defer initialization to selinux_complete_init. */
+		return 0;
+	}
+
+	down(&isec->sem);
+	isec->sclass = inode_mode_to_security_class(inode->i_mode);
+	isec->sid = sid;
+	isec->initialized = 1;
+	up(&isec->sem);
+	return 0;
+}
+
+/* Set the security attributes on a newly created file. */
+static int post_create(struct inode *dir,
+		       struct dentry *dentry)
+{
+
+	struct task_security_struct *tsec;
+	struct inode *inode;
+	struct inode_security_struct *dsec;
+	struct superblock_security_struct *sbsec;
+	u32 newsid;
+	char *context;
+	unsigned int len;
+	int rc;
+
+	tsec = current->security;
+	dsec = dir->i_security;
+	sbsec = dir->i_sb->s_security;
+
+	inode = dentry->d_inode;
+	if (!inode) {
+		/* Some file system types (e.g. NFS) may not instantiate
+		   a dentry for all create operations (e.g. symlink),
+		   so we have to check to see if the inode is non-NULL. */
+		printk(KERN_WARNING "post_create:  no inode, dir (dev=%s, "
+		       "ino=%ld)\n", dir->i_sb->s_id, dir->i_ino);
+		return 0;
+	}
+
+	if (tsec->create_sid && sbsec->behavior != SECURITY_FS_USE_MNTPOINT) {
+		newsid = tsec->create_sid;
+	} else {
+		rc = security_transition_sid(tsec->sid, dsec->sid,
+					     inode_mode_to_security_class(inode->i_mode),
+					     &newsid);
+		if (rc) {
+			printk(KERN_WARNING "post_create:  "
+			       "security_transition_sid failed, rc=%d (dev=%s "
+			       "ino=%ld)\n",
+			       -rc, inode->i_sb->s_id, inode->i_ino);
+			return rc;
+		}
+	}
+
+	rc = inode_security_set_sid(inode, newsid);
+	if (rc) {
+		printk(KERN_WARNING "post_create:  inode_security_set_sid "
+		       "failed, rc=%d (dev=%s ino=%ld)\n",
+		       -rc, inode->i_sb->s_id, inode->i_ino);
+		return rc;
+	}
+
+	if (sbsec->behavior == SECURITY_FS_USE_XATTR &&
+	    inode->i_op->setxattr) {
+		/* Use extended attributes. */
+		rc = security_sid_to_context(newsid, &context, &len);
+		if (rc) {
+			printk(KERN_WARNING "post_create:  sid_to_context "
+			       "failed, rc=%d (dev=%s ino=%ld)\n",
+			       -rc, inode->i_sb->s_id, inode->i_ino);
+			return rc;
+		}
+		down(&inode->i_sem);
+		rc = inode->i_op->setxattr(dentry,
+					   XATTR_NAME_SELINUX,
+					   context, len, 0);
+		up(&inode->i_sem);
+		kfree(context);
+		if (rc < 0) {
+			printk(KERN_WARNING "post_create:  setxattr failed, "
+			       "rc=%d (dev=%s ino=%ld)\n",
+			       -rc, inode->i_sb->s_id, inode->i_ino);
+			return rc;
+		}
+	}
+
+	return 0;
+}
+
+
+/* Hook functions begin here. */
+
+static int selinux_ptrace(struct task_struct *parent, struct task_struct *child)
+{
+	struct task_security_struct *psec = parent->security;
+	struct task_security_struct *csec = child->security;
+	int rc;
+
+	rc = secondary_ops->ptrace(parent,child);
+	if (rc)
+		return rc;
+
+	rc = task_has_perm(parent, child, PROCESS__PTRACE);
+	/* Save the SID of the tracing process for later use in apply_creds. */
+	if (!rc)
+		csec->ptrace_sid = psec->sid;
+	return rc;
+}
+
+static int selinux_capget(struct task_struct *target, kernel_cap_t *effective,
+                          kernel_cap_t *inheritable, kernel_cap_t *permitted)
+{
+	int error;
+
+	error = task_has_perm(current, target, PROCESS__GETCAP);
+	if (error)
+		return error;
+
+	return secondary_ops->capget(target, effective, inheritable, permitted);
+}
+
+static int selinux_capset_check(struct task_struct *target, kernel_cap_t *effective,
+                                kernel_cap_t *inheritable, kernel_cap_t *permitted)
+{
+	int error;
+
+	error = secondary_ops->capset_check(target, effective, inheritable, permitted);
+	if (error)
+		return error;
+
+	return task_has_perm(current, target, PROCESS__SETCAP);
+}
+
+static void selinux_capset_set(struct task_struct *target, kernel_cap_t *effective,
+                               kernel_cap_t *inheritable, kernel_cap_t *permitted)
+{
+	secondary_ops->capset_set(target, effective, inheritable, permitted);
+}
+
+static int selinux_capable(struct task_struct *tsk, int cap)
+{
+	int rc;
+
+	rc = secondary_ops->capable(tsk, cap);
+	if (rc)
+		return rc;
+
+	return task_has_capability(tsk,cap);
+}
+
+static int selinux_sysctl(ctl_table *table, int op)
+{
+	int error = 0;
+	u32 av;
+	struct task_security_struct *tsec;
+	u32 tsid;
+	int rc;
+
+	rc = secondary_ops->sysctl(table, op);
+	if (rc)
+		return rc;
+
+	tsec = current->security;
+
+	rc = selinux_proc_get_sid(table->de, (op == 001) ?
+	                          SECCLASS_DIR : SECCLASS_FILE, &tsid);
+	if (rc) {
+		/* Default to the well-defined sysctl SID. */
+		tsid = SECINITSID_SYSCTL;
+	}
+
+	/* The op values are "defined" in sysctl.c, thereby creating
+	 * a bad coupling between this module and sysctl.c */
+	if(op == 001) {
+		error = avc_has_perm(tsec->sid, tsid,
+				     SECCLASS_DIR, DIR__SEARCH, NULL);
+	} else {
+		av = 0;
+		if (op & 004)
+			av |= FILE__READ;
+		if (op & 002)
+			av |= FILE__WRITE;
+		if (av)
+			error = avc_has_perm(tsec->sid, tsid,
+					     SECCLASS_FILE, av, NULL);
+        }
+
+	return error;
+}
+
+static int selinux_quotactl(int cmds, int type, int id, struct super_block *sb)
+{
+	int rc = 0;
+
+	if (!sb)
+		return 0;
+
+	switch (cmds) {
+		case Q_SYNC:
+		case Q_QUOTAON:
+		case Q_QUOTAOFF:
+	        case Q_SETINFO:
+		case Q_SETQUOTA:
+			rc = superblock_has_perm(current,
+						 sb,
+						 FILESYSTEM__QUOTAMOD, NULL);
+			break;
+	        case Q_GETFMT:
+	        case Q_GETINFO:
+		case Q_GETQUOTA:
+			rc = superblock_has_perm(current,
+						 sb,
+						 FILESYSTEM__QUOTAGET, NULL);
+			break;
+		default:
+			rc = 0;  /* let the kernel handle invalid cmds */
+			break;
+	}
+	return rc;
+}
+
+static int selinux_quota_on(struct dentry *dentry)
+{
+	return dentry_has_perm(current, NULL, dentry, FILE__QUOTAON);
+}
+
+static int selinux_syslog(int type)
+{
+	int rc;
+
+	rc = secondary_ops->syslog(type);
+	if (rc)
+		return rc;
+
+	switch (type) {
+		case 3:         /* Read last kernel messages */
+		case 10:        /* Return size of the log buffer */
+			rc = task_has_system(current, SYSTEM__SYSLOG_READ);
+			break;
+		case 6:         /* Disable logging to console */
+		case 7:         /* Enable logging to console */
+		case 8:		/* Set level of messages printed to console */
+			rc = task_has_system(current, SYSTEM__SYSLOG_CONSOLE);
+			break;
+		case 0:         /* Close log */
+		case 1:         /* Open log */
+		case 2:         /* Read from log */
+		case 4:         /* Read/clear last kernel messages */
+		case 5:         /* Clear ring buffer */
+		default:
+			rc = task_has_system(current, SYSTEM__SYSLOG_MOD);
+			break;
+	}
+	return rc;
+}
+
+/*
+ * Check that a process has enough memory to allocate a new virtual
+ * mapping. 0 means there is enough memory for the allocation to
+ * succeed and -ENOMEM implies there is not.
+ *
+ * Note that secondary_ops->capable and task_has_perm_noaudit return 0
+ * if the capability is granted, but __vm_enough_memory requires 1 if
+ * the capability is granted.
+ *
+ * Do not audit the selinux permission check, as this is applied to all
+ * processes that allocate mappings.
+ */
+static int selinux_vm_enough_memory(long pages)
+{
+	int rc, cap_sys_admin = 0;
+	struct task_security_struct *tsec = current->security;
+
+	rc = secondary_ops->capable(current, CAP_SYS_ADMIN);
+	if (rc == 0)
+		rc = avc_has_perm_noaudit(tsec->sid, tsec->sid,
+					SECCLASS_CAPABILITY,
+					CAP_TO_MASK(CAP_SYS_ADMIN),
+					NULL);
+
+	if (rc == 0)
+		cap_sys_admin = 1;
+
+	return __vm_enough_memory(pages, cap_sys_admin);
+}
+
+/* binprm security operations */
+
+static int selinux_bprm_alloc_security(struct linux_binprm *bprm)
+{
+	struct bprm_security_struct *bsec;
+
+	bsec = kmalloc(sizeof(struct bprm_security_struct), GFP_KERNEL);
+	if (!bsec)
+		return -ENOMEM;
+
+	memset(bsec, 0, sizeof *bsec);
+	bsec->magic = SELINUX_MAGIC;
+	bsec->bprm = bprm;
+	bsec->sid = SECINITSID_UNLABELED;
+	bsec->set = 0;
+
+	bprm->security = bsec;
+	return 0;
+}
+
+static int selinux_bprm_set_security(struct linux_binprm *bprm)
+{
+	struct task_security_struct *tsec;
+	struct inode *inode = bprm->file->f_dentry->d_inode;
+	struct inode_security_struct *isec;
+	struct bprm_security_struct *bsec;
+	u32 newsid;
+	struct avc_audit_data ad;
+	int rc;
+
+	rc = secondary_ops->bprm_set_security(bprm);
+	if (rc)
+		return rc;
+
+	bsec = bprm->security;
+
+	if (bsec->set)
+		return 0;
+
+	tsec = current->security;
+	isec = inode->i_security;
+
+	/* Default to the current task SID. */
+	bsec->sid = tsec->sid;
+
+	/* Reset create SID on execve. */
+	tsec->create_sid = 0;
+
+	if (tsec->exec_sid) {
+		newsid = tsec->exec_sid;
+		/* Reset exec SID on execve. */
+		tsec->exec_sid = 0;
+	} else {
+		/* Check for a default transition on this program. */
+		rc = security_transition_sid(tsec->sid, isec->sid,
+		                             SECCLASS_PROCESS, &newsid);
+		if (rc)
+			return rc;
+	}
+
+	AVC_AUDIT_DATA_INIT(&ad, FS);
+	ad.u.fs.mnt = bprm->file->f_vfsmnt;
+	ad.u.fs.dentry = bprm->file->f_dentry;
+
+	if (bprm->file->f_vfsmnt->mnt_flags & MNT_NOSUID)
+		newsid = tsec->sid;
+
+        if (tsec->sid == newsid) {
+		rc = avc_has_perm(tsec->sid, isec->sid,
+				  SECCLASS_FILE, FILE__EXECUTE_NO_TRANS, &ad);
+		if (rc)
+			return rc;
+	} else {
+		/* Check permissions for the transition. */
+		rc = avc_has_perm(tsec->sid, newsid,
+				  SECCLASS_PROCESS, PROCESS__TRANSITION, &ad);
+		if (rc)
+			return rc;
+
+		rc = avc_has_perm(newsid, isec->sid,
+				  SECCLASS_FILE, FILE__ENTRYPOINT, &ad);
+		if (rc)
+			return rc;
+
+		/* Clear any possibly unsafe personality bits on exec: */
+		current->personality &= ~PER_CLEAR_ON_SETID;
+
+		/* Set the security field to the new SID. */
+		bsec->sid = newsid;
+	}
+
+	bsec->set = 1;
+	return 0;
+}
+
+static int selinux_bprm_check_security (struct linux_binprm *bprm)
+{
+	return secondary_ops->bprm_check_security(bprm);
+}
+
+
+static int selinux_bprm_secureexec (struct linux_binprm *bprm)
+{
+	struct task_security_struct *tsec = current->security;
+	int atsecure = 0;
+
+	if (tsec->osid != tsec->sid) {
+		/* Enable secure mode for SIDs transitions unless
+		   the noatsecure permission is granted between
+		   the two SIDs, i.e. ahp returns 0. */
+		atsecure = avc_has_perm(tsec->osid, tsec->sid,
+					 SECCLASS_PROCESS,
+					 PROCESS__NOATSECURE, NULL);
+	}
+
+	return (atsecure || secondary_ops->bprm_secureexec(bprm));
+}
+
+static void selinux_bprm_free_security(struct linux_binprm *bprm)
+{
+	struct bprm_security_struct *bsec = bprm->security;
+	bprm->security = NULL;
+	kfree(bsec);
+}
+
+extern struct vfsmount *selinuxfs_mount;
+extern struct dentry *selinux_null;
+
+/* Derived from fs/exec.c:flush_old_files. */
+static inline void flush_unauthorized_files(struct files_struct * files)
+{
+	struct avc_audit_data ad;
+	struct file *file, *devnull = NULL;
+	struct tty_struct *tty = current->signal->tty;
+	long j = -1;
+
+	if (tty) {
+		file_list_lock();
+		file = list_entry(tty->tty_files.next, typeof(*file), f_list);
+		if (file) {
+			/* Revalidate access to controlling tty.
+			   Use inode_has_perm on the tty inode directly rather
+			   than using file_has_perm, as this particular open
+			   file may belong to another process and we are only
+			   interested in the inode-based check here. */
+			struct inode *inode = file->f_dentry->d_inode;
+			if (inode_has_perm(current, inode,
+					   FILE__READ | FILE__WRITE, NULL)) {
+				/* Reset controlling tty. */
+				current->signal->tty = NULL;
+				current->signal->tty_old_pgrp = 0;
+			}
+		}
+		file_list_unlock();
+	}
+
+	/* Revalidate access to inherited open files. */
+
+	AVC_AUDIT_DATA_INIT(&ad,FS);
+
+	spin_lock(&files->file_lock);
+	for (;;) {
+		unsigned long set, i;
+		int fd;
+
+		j++;
+		i = j * __NFDBITS;
+		if (i >= files->max_fds || i >= files->max_fdset)
+			break;
+		set = files->open_fds->fds_bits[j];
+		if (!set)
+			continue;
+		spin_unlock(&files->file_lock);
+		for ( ; set ; i++,set >>= 1) {
+			if (set & 1) {
+				file = fget(i);
+				if (!file)
+					continue;
+				if (file_has_perm(current,
+						  file,
+						  file_to_av(file))) {
+					sys_close(i);
+					fd = get_unused_fd();
+					if (fd != i) {
+						if (fd >= 0)
+							put_unused_fd(fd);
+						fput(file);
+						continue;
+					}
+					if (devnull) {
+						atomic_inc(&devnull->f_count);
+					} else {
+						devnull = dentry_open(dget(selinux_null), mntget(selinuxfs_mount), O_RDWR);
+						if (!devnull) {
+							put_unused_fd(fd);
+							fput(file);
+							continue;
+						}
+					}
+					fd_install(fd, devnull);
+				}
+				fput(file);
+			}
+		}
+		spin_lock(&files->file_lock);
+
+	}
+	spin_unlock(&files->file_lock);
+}
+
+static void selinux_bprm_apply_creds(struct linux_binprm *bprm, int unsafe)
+{
+	struct task_security_struct *tsec;
+	struct bprm_security_struct *bsec;
+	u32 sid;
+	int rc;
+
+	secondary_ops->bprm_apply_creds(bprm, unsafe);
+
+	tsec = current->security;
+
+	bsec = bprm->security;
+	sid = bsec->sid;
+
+	tsec->osid = tsec->sid;
+	bsec->unsafe = 0;
+	if (tsec->sid != sid) {
+		/* Check for shared state.  If not ok, leave SID
+		   unchanged and kill. */
+		if (unsafe & LSM_UNSAFE_SHARE) {
+			rc = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
+					PROCESS__SHARE, NULL);
+			if (rc) {
+				bsec->unsafe = 1;
+				return;
+			}
+		}
+
+		/* Check for ptracing, and update the task SID if ok.
+		   Otherwise, leave SID unchanged and kill. */
+		if (unsafe & (LSM_UNSAFE_PTRACE | LSM_UNSAFE_PTRACE_CAP)) {
+			rc = avc_has_perm(tsec->ptrace_sid, sid,
+					  SECCLASS_PROCESS, PROCESS__PTRACE,
+					  NULL);
+			if (rc) {
+				bsec->unsafe = 1;
+				return;
+			}
+		}
+		tsec->sid = sid;
+	}
+}
+
+/*
+ * called after apply_creds without the task lock held
+ */
+static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm)
+{
+	struct task_security_struct *tsec;
+	struct rlimit *rlim, *initrlim;
+	struct itimerval itimer;
+	struct bprm_security_struct *bsec;
+	int rc, i;
+
+	tsec = current->security;
+	bsec = bprm->security;
+
+	if (bsec->unsafe) {
+		force_sig_specific(SIGKILL, current);
+		return;
+	}
+	if (tsec->osid == tsec->sid)
+		return;
+
+	/* Close files for which the new task SID is not authorized. */
+	flush_unauthorized_files(current->files);
+
+	/* Check whether the new SID can inherit signal state
+	   from the old SID.  If not, clear itimers to avoid
+	   subsequent signal generation and flush and unblock
+	   signals. This must occur _after_ the task SID has
+	  been updated so that any kill done after the flush
+	  will be checked against the new SID. */
+	rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
+			  PROCESS__SIGINH, NULL);
+	if (rc) {
+		memset(&itimer, 0, sizeof itimer);
+		for (i = 0; i < 3; i++)
+			do_setitimer(i, &itimer, NULL);
+		flush_signals(current);
+		spin_lock_irq(&current->sighand->siglock);
+		flush_signal_handlers(current, 1);
+		sigemptyset(&current->blocked);
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
+
+	/* Check whether the new SID can inherit resource limits
+	   from the old SID.  If not, reset all soft limits to
+	   the lower of the current task's hard limit and the init
+	   task's soft limit.  Note that the setting of hard limits
+	   (even to lower them) can be controlled by the setrlimit
+	   check. The inclusion of the init task's soft limit into
+	   the computation is to avoid resetting soft limits higher
+	   than the default soft limit for cases where the default
+	   is lower than the hard limit, e.g. RLIMIT_CORE or
+	   RLIMIT_STACK.*/
+	rc = avc_has_perm(tsec->osid, tsec->sid, SECCLASS_PROCESS,
+			  PROCESS__RLIMITINH, NULL);
+	if (rc) {
+		for (i = 0; i < RLIM_NLIMITS; i++) {
+			rlim = current->signal->rlim + i;
+			initrlim = init_task.signal->rlim+i;
+			rlim->rlim_cur = min(rlim->rlim_max,initrlim->rlim_cur);
+		}
+		if (current->signal->rlim[RLIMIT_CPU].rlim_cur != RLIM_INFINITY) {
+			/*
+			 * This will cause RLIMIT_CPU calculations
+			 * to be refigured.
+			 */
+			current->it_prof_expires = jiffies_to_cputime(1);
+		}
+	}
+
+	/* Wake up the parent if it is waiting so that it can
+	   recheck wait permission to the new task SID. */
+	wake_up_interruptible(&current->parent->signal->wait_chldexit);
+}
+
+/* superblock security operations */
+
+static int selinux_sb_alloc_security(struct super_block *sb)
+{
+	return superblock_alloc_security(sb);
+}
+
+static void selinux_sb_free_security(struct super_block *sb)
+{
+	superblock_free_security(sb);
+}
+
+static inline int match_prefix(char *prefix, int plen, char *option, int olen)
+{
+	if (plen > olen)
+		return 0;
+
+	return !memcmp(prefix, option, plen);
+}
+
+static inline int selinux_option(char *option, int len)
+{
+	return (match_prefix("context=", sizeof("context=")-1, option, len) ||
+	        match_prefix("fscontext=", sizeof("fscontext=")-1, option, len) ||
+	        match_prefix("defcontext=", sizeof("defcontext=")-1, option, len));
+}
+
+static inline void take_option(char **to, char *from, int *first, int len)
+{
+	if (!*first) {
+		**to = ',';
+		*to += 1;
+	}
+	else
+		*first = 0;
+	memcpy(*to, from, len);
+	*to += len;
+}
+
+static int selinux_sb_copy_data(struct file_system_type *type, void *orig, void *copy)
+{
+	int fnosec, fsec, rc = 0;
+	char *in_save, *in_curr, *in_end;
+	char *sec_curr, *nosec_save, *nosec;
+
+	in_curr = orig;
+	sec_curr = copy;
+
+	/* Binary mount data: just copy */
+	if (type->fs_flags & FS_BINARY_MOUNTDATA) {
+		copy_page(sec_curr, in_curr);
+		goto out;
+	}
+
+	nosec = (char *)get_zeroed_page(GFP_KERNEL);
+	if (!nosec) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	nosec_save = nosec;
+	fnosec = fsec = 1;
+	in_save = in_end = orig;
+
+	do {
+		if (*in_end == ',' || *in_end == '\0') {
+			int len = in_end - in_curr;
+
+			if (selinux_option(in_curr, len))
+				take_option(&sec_curr, in_curr, &fsec, len);
+			else
+				take_option(&nosec, in_curr, &fnosec, len);
+
+			in_curr = in_end + 1;
+		}
+	} while (*in_end++);
+
+	copy_page(in_save, nosec_save);
+out:
+	return rc;
+}
+
+static int selinux_sb_kern_mount(struct super_block *sb, void *data)
+{
+	struct avc_audit_data ad;
+	int rc;
+
+	rc = superblock_doinit(sb, data);
+	if (rc)
+		return rc;
+
+	AVC_AUDIT_DATA_INIT(&ad,FS);
+	ad.u.fs.dentry = sb->s_root;
+	return superblock_has_perm(current, sb, FILESYSTEM__MOUNT, &ad);
+}
+
+static int selinux_sb_statfs(struct super_block *sb)
+{
+	struct avc_audit_data ad;
+
+	AVC_AUDIT_DATA_INIT(&ad,FS);
+	ad.u.fs.dentry = sb->s_root;
+	return superblock_has_perm(current, sb, FILESYSTEM__GETATTR, &ad);
+}
+
+static int selinux_mount(char * dev_name,
+                         struct nameidata *nd,
+                         char * type,
+                         unsigned long flags,
+                         void * data)
+{
+	int rc;
+
+	rc = secondary_ops->sb_mount(dev_name, nd, type, flags, data);
+	if (rc)
+		return rc;
+
+	if (flags & MS_REMOUNT)
+		return superblock_has_perm(current, nd->mnt->mnt_sb,
+		                           FILESYSTEM__REMOUNT, NULL);
+	else
+		return dentry_has_perm(current, nd->mnt, nd->dentry,
+		                       FILE__MOUNTON);
+}
+
+static int selinux_umount(struct vfsmount *mnt, int flags)
+{
+	int rc;
+
+	rc = secondary_ops->sb_umount(mnt, flags);
+	if (rc)
+		return rc;
+
+	return superblock_has_perm(current,mnt->mnt_sb,
+	                           FILESYSTEM__UNMOUNT,NULL);
+}
+
+/* inode security operations */
+
+static int selinux_inode_alloc_security(struct inode *inode)
+{
+	return inode_alloc_security(inode);
+}
+
+static void selinux_inode_free_security(struct inode *inode)
+{
+	inode_free_security(inode);
+}
+
+static int selinux_inode_create(struct inode *dir, struct dentry *dentry, int mask)
+{
+	return may_create(dir, dentry, SECCLASS_FILE);
+}
+
+static void selinux_inode_post_create(struct inode *dir, struct dentry *dentry, int mask)
+{
+	post_create(dir, dentry);
+}
+
+static int selinux_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry)
+{
+	int rc;
+
+	rc = secondary_ops->inode_link(old_dentry,dir,new_dentry);
+	if (rc)
+		return rc;
+	return may_link(dir, old_dentry, MAY_LINK);
+}
+
+static void selinux_inode_post_link(struct dentry *old_dentry, struct inode *inode, struct dentry *new_dentry)
+{
+	return;
+}
+
+static int selinux_inode_unlink(struct inode *dir, struct dentry *dentry)
+{
+	int rc;
+
+	rc = secondary_ops->inode_unlink(dir, dentry);
+	if (rc)
+		return rc;
+	return may_link(dir, dentry, MAY_UNLINK);
+}
+
+static int selinux_inode_symlink(struct inode *dir, struct dentry *dentry, const char *name)
+{
+	return may_create(dir, dentry, SECCLASS_LNK_FILE);
+}
+
+static void selinux_inode_post_symlink(struct inode *dir, struct dentry *dentry, const char *name)
+{
+	post_create(dir, dentry);
+}
+
+static int selinux_inode_mkdir(struct inode *dir, struct dentry *dentry, int mask)
+{
+	return may_create(dir, dentry, SECCLASS_DIR);
+}
+
+static void selinux_inode_post_mkdir(struct inode *dir, struct dentry *dentry, int mask)
+{
+	post_create(dir, dentry);
+}
+
+static int selinux_inode_rmdir(struct inode *dir, struct dentry *dentry)
+{
+	return may_link(dir, dentry, MAY_RMDIR);
+}
+
+static int selinux_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+{
+	int rc;
+
+	rc = secondary_ops->inode_mknod(dir, dentry, mode, dev);
+	if (rc)
+		return rc;
+
+	return may_create(dir, dentry, inode_mode_to_security_class(mode));
+}
+
+static void selinux_inode_post_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+{
+	post_create(dir, dentry);
+}
+
+static int selinux_inode_rename(struct inode *old_inode, struct dentry *old_dentry,
+                                struct inode *new_inode, struct dentry *new_dentry)
+{
+	return may_rename(old_inode, old_dentry, new_inode, new_dentry);
+}
+
+static void selinux_inode_post_rename(struct inode *old_inode, struct dentry *old_dentry,
+                                      struct inode *new_inode, struct dentry *new_dentry)
+{
+	return;
+}
+
+static int selinux_inode_readlink(struct dentry *dentry)
+{
+	return dentry_has_perm(current, NULL, dentry, FILE__READ);
+}
+
+static int selinux_inode_follow_link(struct dentry *dentry, struct nameidata *nameidata)
+{
+	int rc;
+
+	rc = secondary_ops->inode_follow_link(dentry,nameidata);
+	if (rc)
+		return rc;
+	return dentry_has_perm(current, NULL, dentry, FILE__READ);
+}
+
+static int selinux_inode_permission(struct inode *inode, int mask,
+				    struct nameidata *nd)
+{
+	int rc;
+
+	rc = secondary_ops->inode_permission(inode, mask, nd);
+	if (rc)
+		return rc;
+
+	if (!mask) {
+		/* No permission to check.  Existence test. */
+		return 0;
+	}
+
+	return inode_has_perm(current, inode,
+			       file_mask_to_av(inode->i_mode, mask), NULL);
+}
+
+static int selinux_inode_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+	int rc;
+
+	rc = secondary_ops->inode_setattr(dentry, iattr);
+	if (rc)
+		return rc;
+
+	if (iattr->ia_valid & ATTR_FORCE)
+		return 0;
+
+	if (iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID |
+			       ATTR_ATIME_SET | ATTR_MTIME_SET))
+		return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+
+	return dentry_has_perm(current, NULL, dentry, FILE__WRITE);
+}
+
+static int selinux_inode_getattr(struct vfsmount *mnt, struct dentry *dentry)
+{
+	return dentry_has_perm(current, mnt, dentry, FILE__GETATTR);
+}
+
+static int selinux_inode_setxattr(struct dentry *dentry, char *name, void *value, size_t size, int flags)
+{
+	struct task_security_struct *tsec = current->security;
+	struct inode *inode = dentry->d_inode;
+	struct inode_security_struct *isec = inode->i_security;
+	struct superblock_security_struct *sbsec;
+	struct avc_audit_data ad;
+	u32 newsid;
+	int rc = 0;
+
+	if (strcmp(name, XATTR_NAME_SELINUX)) {
+		if (!strncmp(name, XATTR_SECURITY_PREFIX,
+			     sizeof XATTR_SECURITY_PREFIX - 1) &&
+		    !capable(CAP_SYS_ADMIN)) {
+			/* A different attribute in the security namespace.
+			   Restrict to administrator. */
+			return -EPERM;
+		}
+
+		/* Not an attribute we recognize, so just check the
+		   ordinary setattr permission. */
+		return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+	}
+
+	sbsec = inode->i_sb->s_security;
+	if (sbsec->behavior == SECURITY_FS_USE_MNTPOINT)
+		return -EOPNOTSUPP;
+
+	if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))
+		return -EPERM;
+
+	AVC_AUDIT_DATA_INIT(&ad,FS);
+	ad.u.fs.dentry = dentry;
+
+	rc = avc_has_perm(tsec->sid, isec->sid, isec->sclass,
+			  FILE__RELABELFROM, &ad);
+	if (rc)
+		return rc;
+
+	rc = security_context_to_sid(value, size, &newsid);
+	if (rc)
+		return rc;
+
+	rc = avc_has_perm(tsec->sid, newsid, isec->sclass,
+			  FILE__RELABELTO, &ad);
+	if (rc)
+		return rc;
+
+	rc = security_validate_transition(isec->sid, newsid, tsec->sid,
+	                                  isec->sclass);
+	if (rc)
+		return rc;
+
+	return avc_has_perm(newsid,
+			    sbsec->sid,
+			    SECCLASS_FILESYSTEM,
+			    FILESYSTEM__ASSOCIATE,
+			    &ad);
+}
+
+static void selinux_inode_post_setxattr(struct dentry *dentry, char *name,
+                                        void *value, size_t size, int flags)
+{
+	struct inode *inode = dentry->d_inode;
+	struct inode_security_struct *isec = inode->i_security;
+	u32 newsid;
+	int rc;
+
+	if (strcmp(name, XATTR_NAME_SELINUX)) {
+		/* Not an attribute we recognize, so nothing to do. */
+		return;
+	}
+
+	rc = security_context_to_sid(value, size, &newsid);
+	if (rc) {
+		printk(KERN_WARNING "%s:  unable to obtain SID for context "
+		       "%s, rc=%d\n", __FUNCTION__, (char*)value, -rc);
+		return;
+	}
+
+	isec->sid = newsid;
+	return;
+}
+
+static int selinux_inode_getxattr (struct dentry *dentry, char *name)
+{
+	struct inode *inode = dentry->d_inode;
+	struct superblock_security_struct *sbsec = inode->i_sb->s_security;
+
+	if (sbsec->behavior == SECURITY_FS_USE_MNTPOINT)
+		return -EOPNOTSUPP;
+
+	return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+}
+
+static int selinux_inode_listxattr (struct dentry *dentry)
+{
+	return dentry_has_perm(current, NULL, dentry, FILE__GETATTR);
+}
+
+static int selinux_inode_removexattr (struct dentry *dentry, char *name)
+{
+	if (strcmp(name, XATTR_NAME_SELINUX)) {
+		if (!strncmp(name, XATTR_SECURITY_PREFIX,
+			     sizeof XATTR_SECURITY_PREFIX - 1) &&
+		    !capable(CAP_SYS_ADMIN)) {
+			/* A different attribute in the security namespace.
+			   Restrict to administrator. */
+			return -EPERM;
+		}
+
+		/* Not an attribute we recognize, so just check the
+		   ordinary setattr permission. Might want a separate
+		   permission for removexattr. */
+		return dentry_has_perm(current, NULL, dentry, FILE__SETATTR);
+	}
+
+	/* No one is allowed to remove a SELinux security label.
+	   You can change the label, but all data must be labeled. */
+	return -EACCES;
+}
+
+static int selinux_inode_getsecurity(struct inode *inode, const char *name, void *buffer, size_t size)
+{
+	struct inode_security_struct *isec = inode->i_security;
+	char *context;
+	unsigned len;
+	int rc;
+
+	/* Permission check handled by selinux_inode_getxattr hook.*/
+
+	if (strcmp(name, XATTR_SELINUX_SUFFIX))
+		return -EOPNOTSUPP;
+
+	rc = security_sid_to_context(isec->sid, &context, &len);
+	if (rc)
+		return rc;
+
+	if (!buffer || !size) {
+		kfree(context);
+		return len;
+	}
+	if (size < len) {
+		kfree(context);
+		return -ERANGE;
+	}
+	memcpy(buffer, context, len);
+	kfree(context);
+	return len;
+}
+
+static int selinux_inode_setsecurity(struct inode *inode, const char *name,
+                                     const void *value, size_t size, int flags)
+{
+	struct inode_security_struct *isec = inode->i_security;
+	u32 newsid;
+	int rc;
+
+	if (strcmp(name, XATTR_SELINUX_SUFFIX))
+		return -EOPNOTSUPP;
+
+	if (!value || !size)
+		return -EACCES;
+
+	rc = security_context_to_sid((void*)value, size, &newsid);
+	if (rc)
+		return rc;
+
+	isec->sid = newsid;
+	return 0;
+}
+
+static int selinux_inode_listsecurity(struct inode *inode, char *buffer, size_t buffer_size)
+{
+	const int len = sizeof(XATTR_NAME_SELINUX);
+	if (buffer && len <= buffer_size)
+		memcpy(buffer, XATTR_NAME_SELINUX, len);
+	return len;
+}
+
+/* file security operations */
+
+static int selinux_file_permission(struct file *file, int mask)
+{
+	struct inode *inode = file->f_dentry->d_inode;
+
+	if (!mask) {
+		/* No permission to check.  Existence test. */
+		return 0;
+	}
+
+	/* file_mask_to_av won't add FILE__WRITE if MAY_APPEND is set */
+	if ((file->f_flags & O_APPEND) && (mask & MAY_WRITE))
+		mask |= MAY_APPEND;
+
+	return file_has_perm(current, file,
+			     file_mask_to_av(inode->i_mode, mask));
+}
+
+static int selinux_file_alloc_security(struct file *file)
+{
+	return file_alloc_security(file);
+}
+
+static void selinux_file_free_security(struct file *file)
+{
+	file_free_security(file);
+}
+
+static int selinux_file_ioctl(struct file *file, unsigned int cmd,
+			      unsigned long arg)
+{
+	int error = 0;
+
+	switch (cmd) {
+		case FIONREAD:
+		/* fall through */
+		case FIBMAP:
+		/* fall through */
+		case FIGETBSZ:
+		/* fall through */
+		case EXT2_IOC_GETFLAGS:
+		/* fall through */
+		case EXT2_IOC_GETVERSION:
+			error = file_has_perm(current, file, FILE__GETATTR);
+			break;
+
+		case EXT2_IOC_SETFLAGS:
+		/* fall through */
+		case EXT2_IOC_SETVERSION:
+			error = file_has_perm(current, file, FILE__SETATTR);
+			break;
+
+		/* sys_ioctl() checks */
+		case FIONBIO:
+		/* fall through */
+		case FIOASYNC:
+			error = file_has_perm(current, file, 0);
+			break;
+
+	        case KDSKBENT:
+	        case KDSKBSENT:
+			error = task_has_capability(current,CAP_SYS_TTY_CONFIG);
+			break;
+
+		/* default case assumes that the command will go
+		 * to the file's ioctl() function.
+		 */
+		default:
+			error = file_has_perm(current, file, FILE__IOCTL);
+
+	}
+	return error;
+}
+
+static int file_map_prot_check(struct file *file, unsigned long prot, int shared)
+{
+#ifndef CONFIG_PPC32
+	if ((prot & PROT_EXEC) && (!file || (!shared && (prot & PROT_WRITE)))) {
+		/*
+		 * We are making executable an anonymous mapping or a
+		 * private file mapping that will also be writable.
+		 * This has an additional check.
+		 */
+		int rc = task_has_perm(current, current, PROCESS__EXECMEM);
+		if (rc)
+			return rc;
+	}
+#endif
+
+	if (file) {
+		/* read access is always possible with a mapping */
+		u32 av = FILE__READ;
+
+		/* write access only matters if the mapping is shared */
+		if (shared && (prot & PROT_WRITE))
+			av |= FILE__WRITE;
+
+		if (prot & PROT_EXEC)
+			av |= FILE__EXECUTE;
+
+		return file_has_perm(current, file, av);
+	}
+	return 0;
+}
+
+static int selinux_file_mmap(struct file *file, unsigned long reqprot,
+			     unsigned long prot, unsigned long flags)
+{
+	int rc;
+
+	rc = secondary_ops->file_mmap(file, reqprot, prot, flags);
+	if (rc)
+		return rc;
+
+	if (selinux_checkreqprot)
+		prot = reqprot;
+
+	return file_map_prot_check(file, prot,
+				   (flags & MAP_TYPE) == MAP_SHARED);
+}
+
+static int selinux_file_mprotect(struct vm_area_struct *vma,
+				 unsigned long reqprot,
+				 unsigned long prot)
+{
+	int rc;
+
+	rc = secondary_ops->file_mprotect(vma, reqprot, prot);
+	if (rc)
+		return rc;
+
+	if (selinux_checkreqprot)
+		prot = reqprot;
+
+#ifndef CONFIG_PPC32
+	if (vma->vm_file != NULL && vma->anon_vma != NULL && (prot & PROT_EXEC)) {
+		/*
+		 * We are making executable a file mapping that has
+		 * had some COW done. Since pages might have been written,
+		 * check ability to execute the possibly modified content.
+		 * This typically should only occur for text relocations.
+		 */
+		int rc = file_has_perm(current, vma->vm_file, FILE__EXECMOD);
+		if (rc)
+			return rc;
+	}
+#endif
+
+	return file_map_prot_check(vma->vm_file, prot, vma->vm_flags&VM_SHARED);
+}
+
+static int selinux_file_lock(struct file *file, unsigned int cmd)
+{
+	return file_has_perm(current, file, FILE__LOCK);
+}
+
+static int selinux_file_fcntl(struct file *file, unsigned int cmd,
+			      unsigned long arg)
+{
+	int err = 0;
+
+	switch (cmd) {
+	        case F_SETFL:
+			if (!file->f_dentry || !file->f_dentry->d_inode) {
+				err = -EINVAL;
+				break;
+			}
+
+			if ((file->f_flags & O_APPEND) && !(arg & O_APPEND)) {
+				err = file_has_perm(current, file,FILE__WRITE);
+				break;
+			}
+			/* fall through */
+	        case F_SETOWN:
+	        case F_SETSIG:
+	        case F_GETFL:
+	        case F_GETOWN:
+	        case F_GETSIG:
+			/* Just check FD__USE permission */
+			err = file_has_perm(current, file, 0);
+			break;
+		case F_GETLK:
+		case F_SETLK:
+	        case F_SETLKW:
+#if BITS_PER_LONG == 32
+	        case F_GETLK64:
+		case F_SETLK64:
+	        case F_SETLKW64:
+#endif
+			if (!file->f_dentry || !file->f_dentry->d_inode) {
+				err = -EINVAL;
+				break;
+			}
+			err = file_has_perm(current, file, FILE__LOCK);
+			break;
+	}
+
+	return err;
+}
+
+static int selinux_file_set_fowner(struct file *file)
+{
+	struct task_security_struct *tsec;
+	struct file_security_struct *fsec;
+
+	tsec = current->security;
+	fsec = file->f_security;
+	fsec->fown_sid = tsec->sid;
+
+	return 0;
+}
+
+static int selinux_file_send_sigiotask(struct task_struct *tsk,
+				       struct fown_struct *fown, int signum)
+{
+        struct file *file;
+	u32 perm;
+	struct task_security_struct *tsec;
+	struct file_security_struct *fsec;
+
+	/* struct fown_struct is never outside the context of a struct file */
+        file = (struct file *)((long)fown - offsetof(struct file,f_owner));
+
+	tsec = tsk->security;
+	fsec = file->f_security;
+
+	if (!signum)
+		perm = signal_to_av(SIGIO); /* as per send_sigio_to_task */
+	else
+		perm = signal_to_av(signum);
+
+	return avc_has_perm(fsec->fown_sid, tsec->sid,
+			    SECCLASS_PROCESS, perm, NULL);
+}
+
+static int selinux_file_receive(struct file *file)
+{
+	return file_has_perm(current, file, file_to_av(file));
+}
+
+/* task security operations */
+
+static int selinux_task_create(unsigned long clone_flags)
+{
+	int rc;
+
+	rc = secondary_ops->task_create(clone_flags);
+	if (rc)
+		return rc;
+
+	return task_has_perm(current, current, PROCESS__FORK);
+}
+
+static int selinux_task_alloc_security(struct task_struct *tsk)
+{
+	struct task_security_struct *tsec1, *tsec2;
+	int rc;
+
+	tsec1 = current->security;
+
+	rc = task_alloc_security(tsk);
+	if (rc)
+		return rc;
+	tsec2 = tsk->security;
+
+	tsec2->osid = tsec1->osid;
+	tsec2->sid = tsec1->sid;
+
+	/* Retain the exec and create SIDs across fork */
+	tsec2->exec_sid = tsec1->exec_sid;
+	tsec2->create_sid = tsec1->create_sid;
+
+	/* Retain ptracer SID across fork, if any.
+	   This will be reset by the ptrace hook upon any
+	   subsequent ptrace_attach operations. */
+	tsec2->ptrace_sid = tsec1->ptrace_sid;
+
+	return 0;
+}
+
+static void selinux_task_free_security(struct task_struct *tsk)
+{
+	task_free_security(tsk);
+}
+
+static int selinux_task_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
+{
+	/* Since setuid only affects the current process, and
+	   since the SELinux controls are not based on the Linux
+	   identity attributes, SELinux does not need to control
+	   this operation.  However, SELinux does control the use
+	   of the CAP_SETUID and CAP_SETGID capabilities using the
+	   capable hook. */
+	return 0;
+}
+
+static int selinux_task_post_setuid(uid_t id0, uid_t id1, uid_t id2, int flags)
+{
+	return secondary_ops->task_post_setuid(id0,id1,id2,flags);
+}
+
+static int selinux_task_setgid(gid_t id0, gid_t id1, gid_t id2, int flags)
+{
+	/* See the comment for setuid above. */
+	return 0;
+}
+
+static int selinux_task_setpgid(struct task_struct *p, pid_t pgid)
+{
+	return task_has_perm(current, p, PROCESS__SETPGID);
+}
+
+static int selinux_task_getpgid(struct task_struct *p)
+{
+	return task_has_perm(current, p, PROCESS__GETPGID);
+}
+
+static int selinux_task_getsid(struct task_struct *p)
+{
+	return task_has_perm(current, p, PROCESS__GETSESSION);
+}
+
+static int selinux_task_setgroups(struct group_info *group_info)
+{
+	/* See the comment for setuid above. */
+	return 0;
+}
+
+static int selinux_task_setnice(struct task_struct *p, int nice)
+{
+	int rc;
+
+	rc = secondary_ops->task_setnice(p, nice);
+	if (rc)
+		return rc;
+
+	return task_has_perm(current,p, PROCESS__SETSCHED);
+}
+
+static int selinux_task_setrlimit(unsigned int resource, struct rlimit *new_rlim)
+{
+	struct rlimit *old_rlim = current->signal->rlim + resource;
+	int rc;
+
+	rc = secondary_ops->task_setrlimit(resource, new_rlim);
+	if (rc)
+		return rc;
+
+	/* Control the ability to change the hard limit (whether
+	   lowering or raising it), so that the hard limit can
+	   later be used as a safe reset point for the soft limit
+	   upon context transitions. See selinux_bprm_apply_creds. */
+	if (old_rlim->rlim_max != new_rlim->rlim_max)
+		return task_has_perm(current, current, PROCESS__SETRLIMIT);
+
+	return 0;
+}
+
+static int selinux_task_setscheduler(struct task_struct *p, int policy, struct sched_param *lp)
+{
+	return task_has_perm(current, p, PROCESS__SETSCHED);
+}
+
+static int selinux_task_getscheduler(struct task_struct *p)
+{
+	return task_has_perm(current, p, PROCESS__GETSCHED);
+}
+
+static int selinux_task_kill(struct task_struct *p, struct siginfo *info, int sig)
+{
+	u32 perm;
+	int rc;
+
+	rc = secondary_ops->task_kill(p, info, sig);
+	if (rc)
+		return rc;
+
+	if (info && ((unsigned long)info == 1 ||
+	             (unsigned long)info == 2 || SI_FROMKERNEL(info)))
+		return 0;
+
+	if (!sig)
+		perm = PROCESS__SIGNULL; /* null signal; existence test */
+	else
+		perm = signal_to_av(sig);
+
+	return task_has_perm(current, p, perm);
+}
+
+static int selinux_task_prctl(int option,
+			      unsigned long arg2,
+			      unsigned long arg3,
+			      unsigned long arg4,
+			      unsigned long arg5)
+{
+	/* The current prctl operations do not appear to require
+	   any SELinux controls since they merely observe or modify
+	   the state of the current process. */
+	return 0;
+}
+
+static int selinux_task_wait(struct task_struct *p)
+{
+	u32 perm;
+
+	perm = signal_to_av(p->exit_signal);
+
+	return task_has_perm(p, current, perm);
+}
+
+static void selinux_task_reparent_to_init(struct task_struct *p)
+{
+  	struct task_security_struct *tsec;
+
+	secondary_ops->task_reparent_to_init(p);
+
+	tsec = p->security;
+	tsec->osid = tsec->sid;
+	tsec->sid = SECINITSID_KERNEL;
+	return;
+}
+
+static void selinux_task_to_inode(struct task_struct *p,
+				  struct inode *inode)
+{
+	struct task_security_struct *tsec = p->security;
+	struct inode_security_struct *isec = inode->i_security;
+
+	isec->sid = tsec->sid;
+	isec->initialized = 1;
+	return;
+}
+
+#ifdef CONFIG_SECURITY_NETWORK
+
+/* Returns error only if unable to parse addresses */
+static int selinux_parse_skb_ipv4(struct sk_buff *skb, struct avc_audit_data *ad)
+{
+	int offset, ihlen, ret = -EINVAL;
+	struct iphdr _iph, *ih;
+
+	offset = skb->nh.raw - skb->data;
+	ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
+	if (ih == NULL)
+		goto out;
+
+	ihlen = ih->ihl * 4;
+	if (ihlen < sizeof(_iph))
+		goto out;
+
+	ad->u.net.v4info.saddr = ih->saddr;
+	ad->u.net.v4info.daddr = ih->daddr;
+	ret = 0;
+
+	switch (ih->protocol) {
+        case IPPROTO_TCP: {
+        	struct tcphdr _tcph, *th;
+
+        	if (ntohs(ih->frag_off) & IP_OFFSET)
+        		break;
+
+		offset += ihlen;
+		th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
+		if (th == NULL)
+			break;
+
+		ad->u.net.sport = th->source;
+		ad->u.net.dport = th->dest;
+		break;
+        }
+        
+        case IPPROTO_UDP: {
+        	struct udphdr _udph, *uh;
+        	
+        	if (ntohs(ih->frag_off) & IP_OFFSET)
+        		break;
+        		
+		offset += ihlen;
+        	uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
+		if (uh == NULL)
+			break;	
+
+        	ad->u.net.sport = uh->source;
+        	ad->u.net.dport = uh->dest;
+        	break;
+        }
+
+        default:
+        	break;
+        }
+out:
+	return ret;
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+/* Returns error only if unable to parse addresses */
+static int selinux_parse_skb_ipv6(struct sk_buff *skb, struct avc_audit_data *ad)
+{
+	u8 nexthdr;
+	int ret = -EINVAL, offset;
+	struct ipv6hdr _ipv6h, *ip6;
+
+	offset = skb->nh.raw - skb->data;
+	ip6 = skb_header_pointer(skb, offset, sizeof(_ipv6h), &_ipv6h);
+	if (ip6 == NULL)
+		goto out;
+
+	ipv6_addr_copy(&ad->u.net.v6info.saddr, &ip6->saddr);
+	ipv6_addr_copy(&ad->u.net.v6info.daddr, &ip6->daddr);
+	ret = 0;
+
+	nexthdr = ip6->nexthdr;
+	offset += sizeof(_ipv6h);
+	offset = ipv6_skip_exthdr(skb, offset, &nexthdr,
+				  skb->tail - skb->head - offset);
+	if (offset < 0)
+		goto out;
+
+	switch (nexthdr) {
+	case IPPROTO_TCP: {
+        	struct tcphdr _tcph, *th;
+
+		th = skb_header_pointer(skb, offset, sizeof(_tcph), &_tcph);
+		if (th == NULL)
+			break;
+
+		ad->u.net.sport = th->source;
+		ad->u.net.dport = th->dest;
+		break;
+	}
+
+	case IPPROTO_UDP: {
+		struct udphdr _udph, *uh;
+
+		uh = skb_header_pointer(skb, offset, sizeof(_udph), &_udph);
+		if (uh == NULL)
+			break;
+
+		ad->u.net.sport = uh->source;
+		ad->u.net.dport = uh->dest;
+		break;
+	}
+
+	/* includes fragments */
+	default:
+		break;
+	}
+out:
+	return ret;
+}
+
+#endif /* IPV6 */
+
+static int selinux_parse_skb(struct sk_buff *skb, struct avc_audit_data *ad,
+			     char **addrp, int *len, int src)
+{
+	int ret = 0;
+
+	switch (ad->u.net.family) {
+	case PF_INET:
+		ret = selinux_parse_skb_ipv4(skb, ad);
+		if (ret || !addrp)
+			break;
+		*len = 4;
+		*addrp = (char *)(src ? &ad->u.net.v4info.saddr :
+					&ad->u.net.v4info.daddr);
+		break;
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	case PF_INET6:
+		ret = selinux_parse_skb_ipv6(skb, ad);
+		if (ret || !addrp)
+			break;
+		*len = 16;
+		*addrp = (char *)(src ? &ad->u.net.v6info.saddr :
+					&ad->u.net.v6info.daddr);
+		break;
+#endif	/* IPV6 */
+	default:
+		break;
+	}
+
+	return ret;
+}
+
+/* socket security operations */
+static int socket_has_perm(struct task_struct *task, struct socket *sock,
+			   u32 perms)
+{
+	struct inode_security_struct *isec;
+	struct task_security_struct *tsec;
+	struct avc_audit_data ad;
+	int err = 0;
+
+	tsec = task->security;
+	isec = SOCK_INODE(sock)->i_security;
+
+	if (isec->sid == SECINITSID_KERNEL)
+		goto out;
+
+	AVC_AUDIT_DATA_INIT(&ad,NET);
+	ad.u.net.sk = sock->sk;
+	err = avc_has_perm(tsec->sid, isec->sid, isec->sclass, perms, &ad);
+
+out:
+	return err;
+}
+
+static int selinux_socket_create(int family, int type,
+				 int protocol, int kern)
+{
+	int err = 0;
+	struct task_security_struct *tsec;
+
+	if (kern)
+		goto out;
+
+	tsec = current->security;
+	err = avc_has_perm(tsec->sid, tsec->sid,
+			   socket_type_to_security_class(family, type,
+			   protocol), SOCKET__CREATE, NULL);
+
+out:
+	return err;
+}
+
+static void selinux_socket_post_create(struct socket *sock, int family,
+				       int type, int protocol, int kern)
+{
+	struct inode_security_struct *isec;
+	struct task_security_struct *tsec;
+
+	isec = SOCK_INODE(sock)->i_security;
+
+	tsec = current->security;
+	isec->sclass = socket_type_to_security_class(family, type, protocol);
+	isec->sid = kern ? SECINITSID_KERNEL : tsec->sid;
+	isec->initialized = 1;
+
+	return;
+}
+
+/* Range of port numbers used to automatically bind.
+   Need to determine whether we should perform a name_bind
+   permission check between the socket and the port number. */
+#define ip_local_port_range_0 sysctl_local_port_range[0]
+#define ip_local_port_range_1 sysctl_local_port_range[1]
+
+static int selinux_socket_bind(struct socket *sock, struct sockaddr *address, int addrlen)
+{
+	u16 family;
+	int err;
+
+	err = socket_has_perm(current, sock, SOCKET__BIND);
+	if (err)
+		goto out;
+
+	/*
+	 * If PF_INET or PF_INET6, check name_bind permission for the port.
+	 */
+	family = sock->sk->sk_family;
+	if (family == PF_INET || family == PF_INET6) {
+		char *addrp;
+		struct inode_security_struct *isec;
+		struct task_security_struct *tsec;
+		struct avc_audit_data ad;
+		struct sockaddr_in *addr4 = NULL;
+		struct sockaddr_in6 *addr6 = NULL;
+		unsigned short snum;
+		struct sock *sk = sock->sk;
+		u32 sid, node_perm, addrlen;
+
+		tsec = current->security;
+		isec = SOCK_INODE(sock)->i_security;
+
+		if (family == PF_INET) {
+			addr4 = (struct sockaddr_in *)address;
+			snum = ntohs(addr4->sin_port);
+			addrlen = sizeof(addr4->sin_addr.s_addr);
+			addrp = (char *)&addr4->sin_addr.s_addr;
+		} else {
+			addr6 = (struct sockaddr_in6 *)address;
+			snum = ntohs(addr6->sin6_port);
+			addrlen = sizeof(addr6->sin6_addr.s6_addr);
+			addrp = (char *)&addr6->sin6_addr.s6_addr;
+		}
+
+		if (snum&&(snum < max(PROT_SOCK,ip_local_port_range_0) ||
+			   snum > ip_local_port_range_1)) {
+			err = security_port_sid(sk->sk_family, sk->sk_type,
+						sk->sk_protocol, snum, &sid);
+			if (err)
+				goto out;
+			AVC_AUDIT_DATA_INIT(&ad,NET);
+			ad.u.net.sport = htons(snum);
+			ad.u.net.family = family;
+			err = avc_has_perm(isec->sid, sid,
+					   isec->sclass,
+					   SOCKET__NAME_BIND, &ad);
+			if (err)
+				goto out;
+		}
+		
+		switch(sk->sk_protocol) {
+		case IPPROTO_TCP:
+			node_perm = TCP_SOCKET__NODE_BIND;
+			break;
+			
+		case IPPROTO_UDP:
+			node_perm = UDP_SOCKET__NODE_BIND;
+			break;
+			
+		default:
+			node_perm = RAWIP_SOCKET__NODE_BIND;
+			break;
+		}
+		
+		err = security_node_sid(family, addrp, addrlen, &sid);
+		if (err)
+			goto out;
+		
+		AVC_AUDIT_DATA_INIT(&ad,NET);
+		ad.u.net.sport = htons(snum);
+		ad.u.net.family = family;
+
+		if (family == PF_INET)
+			ad.u.net.v4info.saddr = addr4->sin_addr.s_addr;
+		else
+			ipv6_addr_copy(&ad.u.net.v6info.saddr, &addr6->sin6_addr);
+
+		err = avc_has_perm(isec->sid, sid,
+		                   isec->sclass, node_perm, &ad);
+		if (err)
+			goto out;
+	}
+out:
+	return err;
+}
+
+static int selinux_socket_connect(struct socket *sock, struct sockaddr *address, int addrlen)
+{
+	struct inode_security_struct *isec;
+	int err;
+
+	err = socket_has_perm(current, sock, SOCKET__CONNECT);
+	if (err)
+		return err;
+
+	/*
+	 * If a TCP socket, check name_connect permission for the port.
+	 */
+	isec = SOCK_INODE(sock)->i_security;
+	if (isec->sclass == SECCLASS_TCP_SOCKET) {
+		struct sock *sk = sock->sk;
+		struct avc_audit_data ad;
+		struct sockaddr_in *addr4 = NULL;
+		struct sockaddr_in6 *addr6 = NULL;
+		unsigned short snum;
+		u32 sid;
+
+		if (sk->sk_family == PF_INET) {
+			addr4 = (struct sockaddr_in *)address;
+			if (addrlen != sizeof(struct sockaddr_in))
+				return -EINVAL;
+			snum = ntohs(addr4->sin_port);
+		} else {
+			addr6 = (struct sockaddr_in6 *)address;
+			if (addrlen != sizeof(struct sockaddr_in6))
+				return -EINVAL;
+			snum = ntohs(addr6->sin6_port);
+		}
+
+		err = security_port_sid(sk->sk_family, sk->sk_type,
+					sk->sk_protocol, snum, &sid);
+		if (err)
+			goto out;
+
+		AVC_AUDIT_DATA_INIT(&ad,NET);
+		ad.u.net.dport = htons(snum);
+		ad.u.net.family = sk->sk_family;
+		err = avc_has_perm(isec->sid, sid, isec->sclass,
+				   TCP_SOCKET__NAME_CONNECT, &ad);
+		if (err)
+			goto out;
+	}
+
+out:
+	return err;
+}
+
+static int selinux_socket_listen(struct socket *sock, int backlog)
+{
+	return socket_has_perm(current, sock, SOCKET__LISTEN);
+}
+
+static int selinux_socket_accept(struct socket *sock, struct socket *newsock)
+{
+	int err;
+	struct inode_security_struct *isec;
+	struct inode_security_struct *newisec;
+
+	err = socket_has_perm(current, sock, SOCKET__ACCEPT);
+	if (err)
+		return err;
+
+	newisec = SOCK_INODE(newsock)->i_security;
+
+	isec = SOCK_INODE(sock)->i_security;
+	newisec->sclass = isec->sclass;
+	newisec->sid = isec->sid;
+	newisec->initialized = 1;
+
+	return 0;
+}
+
+static int selinux_socket_sendmsg(struct socket *sock, struct msghdr *msg,
+ 				  int size)
+{
+	return socket_has_perm(current, sock, SOCKET__WRITE);
+}
+
+static int selinux_socket_recvmsg(struct socket *sock, struct msghdr *msg,
+				  int size, int flags)
+{
+	return socket_has_perm(current, sock, SOCKET__READ);
+}
+
+static int selinux_socket_getsockname(struct socket *sock)
+{
+	return socket_has_perm(current, sock, SOCKET__GETATTR);
+}
+
+static int selinux_socket_getpeername(struct socket *sock)
+{
+	return socket_has_perm(current, sock, SOCKET__GETATTR);
+}
+
+static int selinux_socket_setsockopt(struct socket *sock,int level,int optname)
+{
+	return socket_has_perm(current, sock, SOCKET__SETOPT);
+}
+
+static int selinux_socket_getsockopt(struct socket *sock, int level,
+				     int optname)
+{
+	return socket_has_perm(current, sock, SOCKET__GETOPT);
+}
+
+static int selinux_socket_shutdown(struct socket *sock, int how)
+{
+	return socket_has_perm(current, sock, SOCKET__SHUTDOWN);
+}
+
+static int selinux_socket_unix_stream_connect(struct socket *sock,
+					      struct socket *other,
+					      struct sock *newsk)
+{
+	struct sk_security_struct *ssec;
+	struct inode_security_struct *isec;
+	struct inode_security_struct *other_isec;
+	struct avc_audit_data ad;
+	int err;
+
+	err = secondary_ops->unix_stream_connect(sock, other, newsk);
+	if (err)
+		return err;
+
+	isec = SOCK_INODE(sock)->i_security;
+	other_isec = SOCK_INODE(other)->i_security;
+
+	AVC_AUDIT_DATA_INIT(&ad,NET);
+	ad.u.net.sk = other->sk;
+
+	err = avc_has_perm(isec->sid, other_isec->sid,
+			   isec->sclass,
+			   UNIX_STREAM_SOCKET__CONNECTTO, &ad);
+	if (err)
+		return err;
+
+	/* connecting socket */
+	ssec = sock->sk->sk_security;
+	ssec->peer_sid = other_isec->sid;
+	
+	/* server child socket */
+	ssec = newsk->sk_security;
+	ssec->peer_sid = isec->sid;
+	
+	return 0;
+}
+
+static int selinux_socket_unix_may_send(struct socket *sock,
+					struct socket *other)
+{
+	struct inode_security_struct *isec;
+	struct inode_security_struct *other_isec;
+	struct avc_audit_data ad;
+	int err;
+
+	isec = SOCK_INODE(sock)->i_security;
+	other_isec = SOCK_INODE(other)->i_security;
+
+	AVC_AUDIT_DATA_INIT(&ad,NET);
+	ad.u.net.sk = other->sk;
+
+	err = avc_has_perm(isec->sid, other_isec->sid,
+			   isec->sclass, SOCKET__SENDTO, &ad);
+	if (err)
+		return err;
+
+	return 0;
+}
+
+static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+	u16 family;
+	char *addrp;
+	int len, err = 0;
+	u32 netif_perm, node_perm, node_sid, if_sid, recv_perm = 0;
+	u32 sock_sid = 0;
+	u16 sock_class = 0;
+	struct socket *sock;
+	struct net_device *dev;
+	struct avc_audit_data ad;
+
+	family = sk->sk_family;
+	if (family != PF_INET && family != PF_INET6)
+		goto out;
+
+	/* Handle mapped IPv4 packets arriving via IPv6 sockets */
+	if (family == PF_INET6 && skb->protocol == ntohs(ETH_P_IP))
+		family = PF_INET;
+
+ 	read_lock_bh(&sk->sk_callback_lock);
+ 	sock = sk->sk_socket;
+ 	if (sock) {
+ 		struct inode *inode;
+ 		inode = SOCK_INODE(sock);
+ 		if (inode) {
+ 			struct inode_security_struct *isec;
+ 			isec = inode->i_security;
+ 			sock_sid = isec->sid;
+ 			sock_class = isec->sclass;
+ 		}
+ 	}
+ 	read_unlock_bh(&sk->sk_callback_lock);
+ 	if (!sock_sid)
+  		goto out;
+
+	dev = skb->dev;
+	if (!dev)
+		goto out;
+
+	err = sel_netif_sids(dev, &if_sid, NULL);
+	if (err)
+		goto out;
+
+	switch (sock_class) {
+	case SECCLASS_UDP_SOCKET:
+		netif_perm = NETIF__UDP_RECV;
+		node_perm = NODE__UDP_RECV;
+		recv_perm = UDP_SOCKET__RECV_MSG;
+		break;
+	
+	case SECCLASS_TCP_SOCKET:
+		netif_perm = NETIF__TCP_RECV;
+		node_perm = NODE__TCP_RECV;
+		recv_perm = TCP_SOCKET__RECV_MSG;
+		break;
+	
+	default:
+		netif_perm = NETIF__RAWIP_RECV;
+		node_perm = NODE__RAWIP_RECV;
+		break;
+	}
+
+	AVC_AUDIT_DATA_INIT(&ad, NET);
+	ad.u.net.netif = dev->name;
+	ad.u.net.family = family;
+
+	err = selinux_parse_skb(skb, &ad, &addrp, &len, 1);
+	if (err)
+		goto out;
+
+	err = avc_has_perm(sock_sid, if_sid, SECCLASS_NETIF, netif_perm, &ad);
+	if (err)
+		goto out;
+	
+	/* Fixme: this lookup is inefficient */
+	err = security_node_sid(family, addrp, len, &node_sid);
+	if (err)
+		goto out;
+	
+	err = avc_has_perm(sock_sid, node_sid, SECCLASS_NODE, node_perm, &ad);
+	if (err)
+		goto out;
+
+	if (recv_perm) {
+		u32 port_sid;
+
+		/* Fixme: make this more efficient */
+		err = security_port_sid(sk->sk_family, sk->sk_type,
+		                        sk->sk_protocol, ntohs(ad.u.net.sport),
+		                        &port_sid);
+		if (err)
+			goto out;
+
+		err = avc_has_perm(sock_sid, port_sid,
+				   sock_class, recv_perm, &ad);
+	}
+out:	
+	return err;
+}
+
+static int selinux_socket_getpeersec(struct socket *sock, char __user *optval,
+				     int __user *optlen, unsigned len)
+{
+	int err = 0;
+	char *scontext;
+	u32 scontext_len;
+	struct sk_security_struct *ssec;
+	struct inode_security_struct *isec;
+
+	isec = SOCK_INODE(sock)->i_security;
+	if (isec->sclass != SECCLASS_UNIX_STREAM_SOCKET) {
+		err = -ENOPROTOOPT;
+		goto out;
+	}
+
+	ssec = sock->sk->sk_security;
+	
+	err = security_sid_to_context(ssec->peer_sid, &scontext, &scontext_len);
+	if (err)
+		goto out;
+
+	if (scontext_len > len) {
+		err = -ERANGE;
+		goto out_len;
+	}
+
+	if (copy_to_user(optval, scontext, scontext_len))
+		err = -EFAULT;
+
+out_len:
+	if (put_user(scontext_len, optlen))
+		err = -EFAULT;
+
+	kfree(scontext);
+out:	
+	return err;
+}
+
+static int selinux_sk_alloc_security(struct sock *sk, int family, int priority)
+{
+	return sk_alloc_security(sk, family, priority);
+}
+
+static void selinux_sk_free_security(struct sock *sk)
+{
+	sk_free_security(sk);
+}
+
+static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
+{
+	int err = 0;
+	u32 perm;
+	struct nlmsghdr *nlh;
+	struct socket *sock = sk->sk_socket;
+	struct inode_security_struct *isec = SOCK_INODE(sock)->i_security;
+	
+	if (skb->len < NLMSG_SPACE(0)) {
+		err = -EINVAL;
+		goto out;
+	}
+	nlh = (struct nlmsghdr *)skb->data;
+	
+	err = selinux_nlmsg_lookup(isec->sclass, nlh->nlmsg_type, &perm);
+	if (err) {
+		if (err == -EINVAL) {
+			audit_log(current->audit_context,
+				  "SELinux:  unrecognized netlink message"
+				  " type=%hu for sclass=%hu\n",
+				  nlh->nlmsg_type, isec->sclass);
+			if (!selinux_enforcing)
+				err = 0;
+		}
+
+		/* Ignore */
+		if (err == -ENOENT)
+			err = 0;
+		goto out;
+	}
+
+	err = socket_has_perm(current, sock, perm);
+out:
+	return err;
+}
+
+#ifdef CONFIG_NETFILTER
+
+static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
+                                              struct sk_buff **pskb,
+                                              const struct net_device *in,
+                                              const struct net_device *out,
+                                              int (*okfn)(struct sk_buff *),
+                                              u16 family)
+{
+	char *addrp;
+	int len, err = NF_ACCEPT;
+	u32 netif_perm, node_perm, node_sid, if_sid, send_perm = 0;
+	struct sock *sk;
+	struct socket *sock;
+	struct inode *inode;
+	struct sk_buff *skb = *pskb;
+	struct inode_security_struct *isec;
+	struct avc_audit_data ad;
+	struct net_device *dev = (struct net_device *)out;
+	
+	sk = skb->sk;
+	if (!sk)
+		goto out;
+		
+	sock = sk->sk_socket;
+	if (!sock)
+		goto out;
+		
+	inode = SOCK_INODE(sock);
+	if (!inode)
+		goto out;
+
+	err = sel_netif_sids(dev, &if_sid, NULL);
+	if (err)
+		goto out;
+
+	isec = inode->i_security;
+	
+	switch (isec->sclass) {
+	case SECCLASS_UDP_SOCKET:
+		netif_perm = NETIF__UDP_SEND;
+		node_perm = NODE__UDP_SEND;
+		send_perm = UDP_SOCKET__SEND_MSG;
+		break;
+	
+	case SECCLASS_TCP_SOCKET:
+		netif_perm = NETIF__TCP_SEND;
+		node_perm = NODE__TCP_SEND;
+		send_perm = TCP_SOCKET__SEND_MSG;
+		break;
+	
+	default:
+		netif_perm = NETIF__RAWIP_SEND;
+		node_perm = NODE__RAWIP_SEND;
+		break;
+	}
+
+
+	AVC_AUDIT_DATA_INIT(&ad, NET);
+	ad.u.net.netif = dev->name;
+	ad.u.net.family = family;
+
+	err = selinux_parse_skb(skb, &ad, &addrp,
+				&len, 0) ? NF_DROP : NF_ACCEPT;
+	if (err != NF_ACCEPT)
+		goto out;
+
+	err = avc_has_perm(isec->sid, if_sid, SECCLASS_NETIF,
+	                   netif_perm, &ad) ? NF_DROP : NF_ACCEPT;
+	if (err != NF_ACCEPT)
+		goto out;
+		
+	/* Fixme: this lookup is inefficient */
+	err = security_node_sid(family, addrp, len,
+				&node_sid) ? NF_DROP : NF_ACCEPT;
+	if (err != NF_ACCEPT)
+		goto out;
+	
+	err = avc_has_perm(isec->sid, node_sid, SECCLASS_NODE,
+	                   node_perm, &ad) ? NF_DROP : NF_ACCEPT;
+	if (err != NF_ACCEPT)
+		goto out;
+
+	if (send_perm) {
+		u32 port_sid;
+		
+		/* Fixme: make this more efficient */
+		err = security_port_sid(sk->sk_family,
+		                        sk->sk_type,
+		                        sk->sk_protocol,
+		                        ntohs(ad.u.net.dport),
+		                        &port_sid) ? NF_DROP : NF_ACCEPT;
+		if (err != NF_ACCEPT)
+			goto out;
+
+		err = avc_has_perm(isec->sid, port_sid, isec->sclass,
+		                   send_perm, &ad) ? NF_DROP : NF_ACCEPT;
+	}
+
+out:
+	return err;
+}
+
+static unsigned int selinux_ipv4_postroute_last(unsigned int hooknum,
+						struct sk_buff **pskb,
+						const struct net_device *in,
+						const struct net_device *out,
+						int (*okfn)(struct sk_buff *))
+{
+	return selinux_ip_postroute_last(hooknum, pskb, in, out, okfn, PF_INET);
+}
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+static unsigned int selinux_ipv6_postroute_last(unsigned int hooknum,
+						struct sk_buff **pskb,
+						const struct net_device *in,
+						const struct net_device *out,
+						int (*okfn)(struct sk_buff *))
+{
+	return selinux_ip_postroute_last(hooknum, pskb, in, out, okfn, PF_INET6);
+}
+
+#endif	/* IPV6 */
+
+#endif	/* CONFIG_NETFILTER */
+
+#else
+
+static inline int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
+{
+	return 0;
+}
+
+#endif	/* CONFIG_SECURITY_NETWORK */
+
+static int selinux_netlink_send(struct sock *sk, struct sk_buff *skb)
+{
+	struct task_security_struct *tsec;
+	struct av_decision avd;
+	int err;
+
+	err = secondary_ops->netlink_send(sk, skb);
+	if (err)
+		return err;
+
+	tsec = current->security;
+
+	avd.allowed = 0;
+	avc_has_perm_noaudit(tsec->sid, tsec->sid,
+				SECCLASS_CAPABILITY, ~0, &avd);
+	cap_mask(NETLINK_CB(skb).eff_cap, avd.allowed);
+
+	if (policydb_loaded_version >= POLICYDB_VERSION_NLCLASS)
+		err = selinux_nlmsg_perm(sk, skb);
+
+	return err;
+}
+
+static int selinux_netlink_recv(struct sk_buff *skb)
+{
+	if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN))
+		return -EPERM;
+	return 0;
+}
+
+static int ipc_alloc_security(struct task_struct *task,
+			      struct kern_ipc_perm *perm,
+			      u16 sclass)
+{
+	struct task_security_struct *tsec = task->security;
+	struct ipc_security_struct *isec;
+
+	isec = kmalloc(sizeof(struct ipc_security_struct), GFP_KERNEL);
+	if (!isec)
+		return -ENOMEM;
+
+	memset(isec, 0, sizeof(struct ipc_security_struct));
+	isec->magic = SELINUX_MAGIC;
+	isec->sclass = sclass;
+	isec->ipc_perm = perm;
+	if (tsec) {
+		isec->sid = tsec->sid;
+	} else {
+		isec->sid = SECINITSID_UNLABELED;
+	}
+	perm->security = isec;
+
+	return 0;
+}
+
+static void ipc_free_security(struct kern_ipc_perm *perm)
+{
+	struct ipc_security_struct *isec = perm->security;
+	if (!isec || isec->magic != SELINUX_MAGIC)
+		return;
+
+	perm->security = NULL;
+	kfree(isec);
+}
+
+static int msg_msg_alloc_security(struct msg_msg *msg)
+{
+	struct msg_security_struct *msec;
+
+	msec = kmalloc(sizeof(struct msg_security_struct), GFP_KERNEL);
+	if (!msec)
+		return -ENOMEM;
+
+	memset(msec, 0, sizeof(struct msg_security_struct));
+	msec->magic = SELINUX_MAGIC;
+	msec->msg = msg;
+	msec->sid = SECINITSID_UNLABELED;
+	msg->security = msec;
+
+	return 0;
+}
+
+static void msg_msg_free_security(struct msg_msg *msg)
+{
+	struct msg_security_struct *msec = msg->security;
+	if (!msec || msec->magic != SELINUX_MAGIC)
+		return;
+
+	msg->security = NULL;
+	kfree(msec);
+}
+
+static int ipc_has_perm(struct kern_ipc_perm *ipc_perms,
+			u16 sclass, u32 perms)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+
+	tsec = current->security;
+	isec = ipc_perms->security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+	ad.u.ipc_id = ipc_perms->key;
+
+	return avc_has_perm(tsec->sid, isec->sid, sclass, perms, &ad);
+}
+
+static int selinux_msg_msg_alloc_security(struct msg_msg *msg)
+{
+	return msg_msg_alloc_security(msg);
+}
+
+static void selinux_msg_msg_free_security(struct msg_msg *msg)
+{
+	msg_msg_free_security(msg);
+}
+
+/* message queue security operations */
+static int selinux_msg_queue_alloc_security(struct msg_queue *msq)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+	int rc;
+
+	rc = ipc_alloc_security(current, &msq->q_perm, SECCLASS_MSGQ);
+	if (rc)
+		return rc;
+
+	tsec = current->security;
+	isec = msq->q_perm.security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+ 	ad.u.ipc_id = msq->q_perm.key;
+
+	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+			  MSGQ__CREATE, &ad);
+	if (rc) {
+		ipc_free_security(&msq->q_perm);
+		return rc;
+	}
+	return 0;
+}
+
+static void selinux_msg_queue_free_security(struct msg_queue *msq)
+{
+	ipc_free_security(&msq->q_perm);
+}
+
+static int selinux_msg_queue_associate(struct msg_queue *msq, int msqflg)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+
+	tsec = current->security;
+	isec = msq->q_perm.security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+	ad.u.ipc_id = msq->q_perm.key;
+
+	return avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+			    MSGQ__ASSOCIATE, &ad);
+}
+
+static int selinux_msg_queue_msgctl(struct msg_queue *msq, int cmd)
+{
+	int err;
+	int perms;
+
+	switch(cmd) {
+	case IPC_INFO:
+	case MSG_INFO:
+		/* No specific object, just general system-wide information. */
+		return task_has_system(current, SYSTEM__IPC_INFO);
+	case IPC_STAT:
+	case MSG_STAT:
+		perms = MSGQ__GETATTR | MSGQ__ASSOCIATE;
+		break;
+	case IPC_SET:
+		perms = MSGQ__SETATTR;
+		break;
+	case IPC_RMID:
+		perms = MSGQ__DESTROY;
+		break;
+	default:
+		return 0;
+	}
+
+	err = ipc_has_perm(&msq->q_perm, SECCLASS_MSGQ, perms);
+	return err;
+}
+
+static int selinux_msg_queue_msgsnd(struct msg_queue *msq, struct msg_msg *msg, int msqflg)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct msg_security_struct *msec;
+	struct avc_audit_data ad;
+	int rc;
+
+	tsec = current->security;
+	isec = msq->q_perm.security;
+	msec = msg->security;
+
+	/*
+	 * First time through, need to assign label to the message
+	 */
+	if (msec->sid == SECINITSID_UNLABELED) {
+		/*
+		 * Compute new sid based on current process and
+		 * message queue this message will be stored in
+		 */
+		rc = security_transition_sid(tsec->sid,
+					     isec->sid,
+					     SECCLASS_MSG,
+					     &msec->sid);
+		if (rc)
+			return rc;
+	}
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+	ad.u.ipc_id = msq->q_perm.key;
+
+	/* Can this process write to the queue? */
+	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_MSGQ,
+			  MSGQ__WRITE, &ad);
+	if (!rc)
+		/* Can this process send the message */
+		rc = avc_has_perm(tsec->sid, msec->sid,
+				  SECCLASS_MSG, MSG__SEND, &ad);
+	if (!rc)
+		/* Can the message be put in the queue? */
+		rc = avc_has_perm(msec->sid, isec->sid,
+				  SECCLASS_MSGQ, MSGQ__ENQUEUE, &ad);
+
+	return rc;
+}
+
+static int selinux_msg_queue_msgrcv(struct msg_queue *msq, struct msg_msg *msg,
+				    struct task_struct *target,
+				    long type, int mode)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct msg_security_struct *msec;
+	struct avc_audit_data ad;
+	int rc;
+
+	tsec = target->security;
+	isec = msq->q_perm.security;
+	msec = msg->security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+ 	ad.u.ipc_id = msq->q_perm.key;
+
+	rc = avc_has_perm(tsec->sid, isec->sid,
+			  SECCLASS_MSGQ, MSGQ__READ, &ad);
+	if (!rc)
+		rc = avc_has_perm(tsec->sid, msec->sid,
+				  SECCLASS_MSG, MSG__RECEIVE, &ad);
+	return rc;
+}
+
+/* Shared Memory security operations */
+static int selinux_shm_alloc_security(struct shmid_kernel *shp)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+	int rc;
+
+	rc = ipc_alloc_security(current, &shp->shm_perm, SECCLASS_SHM);
+	if (rc)
+		return rc;
+
+	tsec = current->security;
+	isec = shp->shm_perm.security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+ 	ad.u.ipc_id = shp->shm_perm.key;
+
+	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
+			  SHM__CREATE, &ad);
+	if (rc) {
+		ipc_free_security(&shp->shm_perm);
+		return rc;
+	}
+	return 0;
+}
+
+static void selinux_shm_free_security(struct shmid_kernel *shp)
+{
+	ipc_free_security(&shp->shm_perm);
+}
+
+static int selinux_shm_associate(struct shmid_kernel *shp, int shmflg)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+
+	tsec = current->security;
+	isec = shp->shm_perm.security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+	ad.u.ipc_id = shp->shm_perm.key;
+
+	return avc_has_perm(tsec->sid, isec->sid, SECCLASS_SHM,
+			    SHM__ASSOCIATE, &ad);
+}
+
+/* Note, at this point, shp is locked down */
+static int selinux_shm_shmctl(struct shmid_kernel *shp, int cmd)
+{
+	int perms;
+	int err;
+
+	switch(cmd) {
+	case IPC_INFO:
+	case SHM_INFO:
+		/* No specific object, just general system-wide information. */
+		return task_has_system(current, SYSTEM__IPC_INFO);
+	case IPC_STAT:
+	case SHM_STAT:
+		perms = SHM__GETATTR | SHM__ASSOCIATE;
+		break;
+	case IPC_SET:
+		perms = SHM__SETATTR;
+		break;
+	case SHM_LOCK:
+	case SHM_UNLOCK:
+		perms = SHM__LOCK;
+		break;
+	case IPC_RMID:
+		perms = SHM__DESTROY;
+		break;
+	default:
+		return 0;
+	}
+
+	err = ipc_has_perm(&shp->shm_perm, SECCLASS_SHM, perms);
+	return err;
+}
+
+static int selinux_shm_shmat(struct shmid_kernel *shp,
+			     char __user *shmaddr, int shmflg)
+{
+	u32 perms;
+	int rc;
+
+	rc = secondary_ops->shm_shmat(shp, shmaddr, shmflg);
+	if (rc)
+		return rc;
+
+	if (shmflg & SHM_RDONLY)
+		perms = SHM__READ;
+	else
+		perms = SHM__READ | SHM__WRITE;
+
+	return ipc_has_perm(&shp->shm_perm, SECCLASS_SHM, perms);
+}
+
+/* Semaphore security operations */
+static int selinux_sem_alloc_security(struct sem_array *sma)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+	int rc;
+
+	rc = ipc_alloc_security(current, &sma->sem_perm, SECCLASS_SEM);
+	if (rc)
+		return rc;
+
+	tsec = current->security;
+	isec = sma->sem_perm.security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+ 	ad.u.ipc_id = sma->sem_perm.key;
+
+	rc = avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
+			  SEM__CREATE, &ad);
+	if (rc) {
+		ipc_free_security(&sma->sem_perm);
+		return rc;
+	}
+	return 0;
+}
+
+static void selinux_sem_free_security(struct sem_array *sma)
+{
+	ipc_free_security(&sma->sem_perm);
+}
+
+static int selinux_sem_associate(struct sem_array *sma, int semflg)
+{
+	struct task_security_struct *tsec;
+	struct ipc_security_struct *isec;
+	struct avc_audit_data ad;
+
+	tsec = current->security;
+	isec = sma->sem_perm.security;
+
+	AVC_AUDIT_DATA_INIT(&ad, IPC);
+	ad.u.ipc_id = sma->sem_perm.key;
+
+	return avc_has_perm(tsec->sid, isec->sid, SECCLASS_SEM,
+			    SEM__ASSOCIATE, &ad);
+}
+
+/* Note, at this point, sma is locked down */
+static int selinux_sem_semctl(struct sem_array *sma, int cmd)
+{
+	int err;
+	u32 perms;
+
+	switch(cmd) {
+	case IPC_INFO:
+	case SEM_INFO:
+		/* No specific object, just general system-wide information. */
+		return task_has_system(current, SYSTEM__IPC_INFO);
+	case GETPID:
+	case GETNCNT:
+	case GETZCNT:
+		perms = SEM__GETATTR;
+		break;
+	case GETVAL:
+	case GETALL:
+		perms = SEM__READ;
+		break;
+	case SETVAL:
+	case SETALL:
+		perms = SEM__WRITE;
+		break;
+	case IPC_RMID:
+		perms = SEM__DESTROY;
+		break;
+	case IPC_SET:
+		perms = SEM__SETATTR;
+		break;
+	case IPC_STAT:
+	case SEM_STAT:
+		perms = SEM__GETATTR | SEM__ASSOCIATE;
+		break;
+	default:
+		return 0;
+	}
+
+	err = ipc_has_perm(&sma->sem_perm, SECCLASS_SEM, perms);
+	return err;
+}
+
+static int selinux_sem_semop(struct sem_array *sma,
+			     struct sembuf *sops, unsigned nsops, int alter)
+{
+	u32 perms;
+
+	if (alter)
+		perms = SEM__READ | SEM__WRITE;
+	else
+		perms = SEM__READ;
+
+	return ipc_has_perm(&sma->sem_perm, SECCLASS_SEM, perms);
+}
+
+static int selinux_ipc_permission(struct kern_ipc_perm *ipcp, short flag)
+{
+	struct ipc_security_struct *isec = ipcp->security;
+	u16 sclass = SECCLASS_IPC;
+	u32 av = 0;
+
+	if (isec && isec->magic == SELINUX_MAGIC)
+		sclass = isec->sclass;
+
+	av = 0;
+	if (flag & S_IRUGO)
+		av |= IPC__UNIX_READ;
+	if (flag & S_IWUGO)
+		av |= IPC__UNIX_WRITE;
+
+	if (av == 0)
+		return 0;
+
+	return ipc_has_perm(ipcp, sclass, av);
+}
+
+/* module stacking operations */
+static int selinux_register_security (const char *name, struct security_operations *ops)
+{
+	if (secondary_ops != original_ops) {
+		printk(KERN_INFO "%s:  There is already a secondary security "
+		       "module registered.\n", __FUNCTION__);
+		return -EINVAL;
+ 	}
+
+	secondary_ops = ops;
+
+	printk(KERN_INFO "%s:  Registering secondary module %s\n",
+	       __FUNCTION__,
+	       name);
+
+	return 0;
+}
+
+static int selinux_unregister_security (const char *name, struct security_operations *ops)
+{
+	if (ops != secondary_ops) {
+		printk (KERN_INFO "%s:  trying to unregister a security module "
+		        "that is not registered.\n", __FUNCTION__);
+		return -EINVAL;
+	}
+
+	secondary_ops = original_ops;
+
+	return 0;
+}
+
+static void selinux_d_instantiate (struct dentry *dentry, struct inode *inode)
+{
+	if (inode)
+		inode_doinit_with_dentry(inode, dentry);
+}
+
+static int selinux_getprocattr(struct task_struct *p,
+			       char *name, void *value, size_t size)
+{
+	struct task_security_struct *tsec;
+	u32 sid, len;
+	char *context;
+	int error;
+
+	if (current != p) {
+		error = task_has_perm(current, p, PROCESS__GETATTR);
+		if (error)
+			return error;
+	}
+
+	if (!size)
+		return -ERANGE;
+
+	tsec = p->security;
+
+	if (!strcmp(name, "current"))
+		sid = tsec->sid;
+	else if (!strcmp(name, "prev"))
+		sid = tsec->osid;
+	else if (!strcmp(name, "exec"))
+		sid = tsec->exec_sid;
+	else if (!strcmp(name, "fscreate"))
+		sid = tsec->create_sid;
+	else
+		return -EINVAL;
+
+	if (!sid)
+		return 0;
+
+	error = security_sid_to_context(sid, &context, &len);
+	if (error)
+		return error;
+	if (len > size) {
+		kfree(context);
+		return -ERANGE;
+	}
+	memcpy(value, context, len);
+	kfree(context);
+	return len;
+}
+
+static int selinux_setprocattr(struct task_struct *p,
+			       char *name, void *value, size_t size)
+{
+	struct task_security_struct *tsec;
+	u32 sid = 0;
+	int error;
+	char *str = value;
+
+	if (current != p) {
+		/* SELinux only allows a process to change its own
+		   security attributes. */
+		return -EACCES;
+	}
+
+	/*
+	 * Basic control over ability to set these attributes at all.
+	 * current == p, but we'll pass them separately in case the
+	 * above restriction is ever removed.
+	 */
+	if (!strcmp(name, "exec"))
+		error = task_has_perm(current, p, PROCESS__SETEXEC);
+	else if (!strcmp(name, "fscreate"))
+		error = task_has_perm(current, p, PROCESS__SETFSCREATE);
+	else if (!strcmp(name, "current"))
+		error = task_has_perm(current, p, PROCESS__SETCURRENT);
+	else
+		error = -EINVAL;
+	if (error)
+		return error;
+
+	/* Obtain a SID for the context, if one was specified. */
+	if (size && str[1] && str[1] != '\n') {
+		if (str[size-1] == '\n') {
+			str[size-1] = 0;
+			size--;
+		}
+		error = security_context_to_sid(value, size, &sid);
+		if (error)
+			return error;
+	}
+
+	/* Permission checking based on the specified context is
+	   performed during the actual operation (execve,
+	   open/mkdir/...), when we know the full context of the
+	   operation.  See selinux_bprm_set_security for the execve
+	   checks and may_create for the file creation checks. The
+	   operation will then fail if the context is not permitted. */
+	tsec = p->security;
+	if (!strcmp(name, "exec"))
+		tsec->exec_sid = sid;
+	else if (!strcmp(name, "fscreate"))
+		tsec->create_sid = sid;
+	else if (!strcmp(name, "current")) {
+		struct av_decision avd;
+
+		if (sid == 0)
+			return -EINVAL;
+
+		/* Only allow single threaded processes to change context */
+		if (atomic_read(&p->mm->mm_users) != 1) {
+			struct task_struct *g, *t;
+			struct mm_struct *mm = p->mm;
+			read_lock(&tasklist_lock);
+			do_each_thread(g, t)
+				if (t->mm == mm && t != p) {
+					read_unlock(&tasklist_lock);
+					return -EPERM;
+				}
+			while_each_thread(g, t);
+			read_unlock(&tasklist_lock);
+                }
+
+		/* Check permissions for the transition. */
+		error = avc_has_perm(tsec->sid, sid, SECCLASS_PROCESS,
+		                     PROCESS__DYNTRANSITION, NULL);
+		if (error)
+			return error;
+
+		/* Check for ptracing, and update the task SID if ok.
+		   Otherwise, leave SID unchanged and fail. */
+		task_lock(p);
+		if (p->ptrace & PT_PTRACED) {
+			error = avc_has_perm_noaudit(tsec->ptrace_sid, sid,
+						     SECCLASS_PROCESS,
+						     PROCESS__PTRACE, &avd);
+			if (!error)
+				tsec->sid = sid;
+			task_unlock(p);
+			avc_audit(tsec->ptrace_sid, sid, SECCLASS_PROCESS,
+				  PROCESS__PTRACE, &avd, error, NULL);
+			if (error)
+				return error;
+		} else {
+			tsec->sid = sid;
+			task_unlock(p);
+		}
+	}
+	else
+		return -EINVAL;
+
+	return size;
+}
+
+static struct security_operations selinux_ops = {
+	.ptrace =			selinux_ptrace,
+	.capget =			selinux_capget,
+	.capset_check =			selinux_capset_check,
+	.capset_set =			selinux_capset_set,
+	.sysctl =			selinux_sysctl,
+	.capable =			selinux_capable,
+	.quotactl =			selinux_quotactl,
+	.quota_on =			selinux_quota_on,
+	.syslog =			selinux_syslog,
+	.vm_enough_memory =		selinux_vm_enough_memory,
+
+	.netlink_send =			selinux_netlink_send,
+        .netlink_recv =			selinux_netlink_recv,
+
+	.bprm_alloc_security =		selinux_bprm_alloc_security,
+	.bprm_free_security =		selinux_bprm_free_security,
+	.bprm_apply_creds =		selinux_bprm_apply_creds,
+	.bprm_post_apply_creds =	selinux_bprm_post_apply_creds,
+	.bprm_set_security =		selinux_bprm_set_security,
+	.bprm_check_security =		selinux_bprm_check_security,
+	.bprm_secureexec =		selinux_bprm_secureexec,
+
+	.sb_alloc_security =		selinux_sb_alloc_security,
+	.sb_free_security =		selinux_sb_free_security,
+	.sb_copy_data =			selinux_sb_copy_data,
+	.sb_kern_mount =	        selinux_sb_kern_mount,
+	.sb_statfs =			selinux_sb_statfs,
+	.sb_mount =			selinux_mount,
+	.sb_umount =			selinux_umount,
+
+	.inode_alloc_security =		selinux_inode_alloc_security,
+	.inode_free_security =		selinux_inode_free_security,
+	.inode_create =			selinux_inode_create,
+	.inode_post_create =		selinux_inode_post_create,
+	.inode_link =			selinux_inode_link,
+	.inode_post_link =		selinux_inode_post_link,
+	.inode_unlink =			selinux_inode_unlink,
+	.inode_symlink =		selinux_inode_symlink,
+	.inode_post_symlink =		selinux_inode_post_symlink,
+	.inode_mkdir =			selinux_inode_mkdir,
+	.inode_post_mkdir =		selinux_inode_post_mkdir,
+	.inode_rmdir =			selinux_inode_rmdir,
+	.inode_mknod =			selinux_inode_mknod,
+	.inode_post_mknod =		selinux_inode_post_mknod,
+	.inode_rename =			selinux_inode_rename,
+	.inode_post_rename =		selinux_inode_post_rename,
+	.inode_readlink =		selinux_inode_readlink,
+	.inode_follow_link =		selinux_inode_follow_link,
+	.inode_permission =		selinux_inode_permission,
+	.inode_setattr =		selinux_inode_setattr,
+	.inode_getattr =		selinux_inode_getattr,
+	.inode_setxattr =		selinux_inode_setxattr,
+	.inode_post_setxattr =		selinux_inode_post_setxattr,
+	.inode_getxattr =		selinux_inode_getxattr,
+	.inode_listxattr =		selinux_inode_listxattr,
+	.inode_removexattr =		selinux_inode_removexattr,
+	.inode_getsecurity =            selinux_inode_getsecurity,
+	.inode_setsecurity =            selinux_inode_setsecurity,
+	.inode_listsecurity =           selinux_inode_listsecurity,
+
+	.file_permission =		selinux_file_permission,
+	.file_alloc_security =		selinux_file_alloc_security,
+	.file_free_security =		selinux_file_free_security,
+	.file_ioctl =			selinux_file_ioctl,
+	.file_mmap =			selinux_file_mmap,
+	.file_mprotect =		selinux_file_mprotect,
+	.file_lock =			selinux_file_lock,
+	.file_fcntl =			selinux_file_fcntl,
+	.file_set_fowner =		selinux_file_set_fowner,
+	.file_send_sigiotask =		selinux_file_send_sigiotask,
+	.file_receive =			selinux_file_receive,
+
+	.task_create =			selinux_task_create,
+	.task_alloc_security =		selinux_task_alloc_security,
+	.task_free_security =		selinux_task_free_security,
+	.task_setuid =			selinux_task_setuid,
+	.task_post_setuid =		selinux_task_post_setuid,
+	.task_setgid =			selinux_task_setgid,
+	.task_setpgid =			selinux_task_setpgid,
+	.task_getpgid =			selinux_task_getpgid,
+	.task_getsid =		        selinux_task_getsid,
+	.task_setgroups =		selinux_task_setgroups,
+	.task_setnice =			selinux_task_setnice,
+	.task_setrlimit =		selinux_task_setrlimit,
+	.task_setscheduler =		selinux_task_setscheduler,
+	.task_getscheduler =		selinux_task_getscheduler,
+	.task_kill =			selinux_task_kill,
+	.task_wait =			selinux_task_wait,
+	.task_prctl =			selinux_task_prctl,
+	.task_reparent_to_init =	selinux_task_reparent_to_init,
+	.task_to_inode =                selinux_task_to_inode,
+
+	.ipc_permission =		selinux_ipc_permission,
+
+	.msg_msg_alloc_security =	selinux_msg_msg_alloc_security,
+	.msg_msg_free_security =	selinux_msg_msg_free_security,
+
+	.msg_queue_alloc_security =	selinux_msg_queue_alloc_security,
+	.msg_queue_free_security =	selinux_msg_queue_free_security,
+	.msg_queue_associate =		selinux_msg_queue_associate,
+	.msg_queue_msgctl =		selinux_msg_queue_msgctl,
+	.msg_queue_msgsnd =		selinux_msg_queue_msgsnd,
+	.msg_queue_msgrcv =		selinux_msg_queue_msgrcv,
+
+	.shm_alloc_security =		selinux_shm_alloc_security,
+	.shm_free_security =		selinux_shm_free_security,
+	.shm_associate =		selinux_shm_associate,
+	.shm_shmctl =			selinux_shm_shmctl,
+	.shm_shmat =			selinux_shm_shmat,
+
+	.sem_alloc_security = 		selinux_sem_alloc_security,
+	.sem_free_security =  		selinux_sem_free_security,
+	.sem_associate =		selinux_sem_associate,
+	.sem_semctl =			selinux_sem_semctl,
+	.sem_semop =			selinux_sem_semop,
+
+	.register_security =		selinux_register_security,
+	.unregister_security =		selinux_unregister_security,
+
+	.d_instantiate =                selinux_d_instantiate,
+
+	.getprocattr =                  selinux_getprocattr,
+	.setprocattr =                  selinux_setprocattr,
+
+#ifdef CONFIG_SECURITY_NETWORK
+        .unix_stream_connect =		selinux_socket_unix_stream_connect,
+	.unix_may_send =		selinux_socket_unix_may_send,
+
+	.socket_create =		selinux_socket_create,
+	.socket_post_create =		selinux_socket_post_create,
+	.socket_bind =			selinux_socket_bind,
+	.socket_connect =		selinux_socket_connect,
+	.socket_listen =		selinux_socket_listen,
+	.socket_accept =		selinux_socket_accept,
+	.socket_sendmsg =		selinux_socket_sendmsg,
+	.socket_recvmsg =		selinux_socket_recvmsg,
+	.socket_getsockname =		selinux_socket_getsockname,
+	.socket_getpeername =		selinux_socket_getpeername,
+	.socket_getsockopt =		selinux_socket_getsockopt,
+	.socket_setsockopt =		selinux_socket_setsockopt,
+	.socket_shutdown =		selinux_socket_shutdown,
+	.socket_sock_rcv_skb =		selinux_socket_sock_rcv_skb,
+	.socket_getpeersec =		selinux_socket_getpeersec,
+	.sk_alloc_security =		selinux_sk_alloc_security,
+	.sk_free_security =		selinux_sk_free_security,
+#endif
+};
+
+static __init int selinux_init(void)
+{
+	struct task_security_struct *tsec;
+
+	if (!selinux_enabled) {
+		printk(KERN_INFO "SELinux:  Disabled at boot.\n");
+		return 0;
+	}
+
+	printk(KERN_INFO "SELinux:  Initializing.\n");
+
+	/* Set the security state for the initial task. */
+	if (task_alloc_security(current))
+		panic("SELinux:  Failed to initialize initial task.\n");
+	tsec = current->security;
+	tsec->osid = tsec->sid = SECINITSID_KERNEL;
+
+	avc_init();
+
+	original_ops = secondary_ops = security_ops;
+	if (!secondary_ops)
+		panic ("SELinux: No initial security operations\n");
+	if (register_security (&selinux_ops))
+		panic("SELinux: Unable to register with kernel.\n");
+
+	if (selinux_enforcing) {
+		printk(KERN_INFO "SELinux:  Starting in enforcing mode\n");
+	} else {
+		printk(KERN_INFO "SELinux:  Starting in permissive mode\n");
+	}
+	return 0;
+}
+
+void selinux_complete_init(void)
+{
+	printk(KERN_INFO "SELinux:  Completing initialization.\n");
+
+	/* Set up any superblocks initialized prior to the policy load. */
+	printk(KERN_INFO "SELinux:  Setting up existing superblocks.\n");
+	spin_lock(&sb_security_lock);
+next_sb:
+	if (!list_empty(&superblock_security_head)) {
+		struct superblock_security_struct *sbsec =
+				list_entry(superblock_security_head.next,
+				           struct superblock_security_struct,
+				           list);
+		struct super_block *sb = sbsec->sb;
+		spin_lock(&sb_lock);
+		sb->s_count++;
+		spin_unlock(&sb_lock);
+		spin_unlock(&sb_security_lock);
+		down_read(&sb->s_umount);
+		if (sb->s_root)
+			superblock_doinit(sb, NULL);
+		drop_super(sb);
+		spin_lock(&sb_security_lock);
+		list_del_init(&sbsec->list);
+		goto next_sb;
+	}
+	spin_unlock(&sb_security_lock);
+}
+
+/* SELinux requires early initialization in order to label
+   all processes and objects when they are created. */
+security_initcall(selinux_init);
+
+#if defined(CONFIG_SECURITY_NETWORK) && defined(CONFIG_NETFILTER)
+
+static struct nf_hook_ops selinux_ipv4_op = {
+	.hook =		selinux_ipv4_postroute_last,
+	.owner =	THIS_MODULE,
+	.pf =		PF_INET,
+	.hooknum =	NF_IP_POST_ROUTING,
+	.priority =	NF_IP_PRI_SELINUX_LAST,
+};
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+static struct nf_hook_ops selinux_ipv6_op = {
+	.hook =		selinux_ipv6_postroute_last,
+	.owner =	THIS_MODULE,
+	.pf =		PF_INET6,
+	.hooknum =	NF_IP6_POST_ROUTING,
+	.priority =	NF_IP6_PRI_SELINUX_LAST,
+};
+
+#endif	/* IPV6 */
+
+static int __init selinux_nf_ip_init(void)
+{
+	int err = 0;
+
+	if (!selinux_enabled)
+		goto out;
+		
+	printk(KERN_INFO "SELinux:  Registering netfilter hooks\n");
+	
+	err = nf_register_hook(&selinux_ipv4_op);
+	if (err)
+		panic("SELinux: nf_register_hook for IPv4: error %d\n", err);
+
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+
+	err = nf_register_hook(&selinux_ipv6_op);
+	if (err)
+		panic("SELinux: nf_register_hook for IPv6: error %d\n", err);
+
+#endif	/* IPV6 */
+out:
+	return err;
+}
+
+__initcall(selinux_nf_ip_init);
+
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+static void selinux_nf_ip_exit(void)
+{
+	printk(KERN_INFO "SELinux:  Unregistering netfilter hooks\n");
+
+	nf_unregister_hook(&selinux_ipv4_op);
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+	nf_unregister_hook(&selinux_ipv6_op);
+#endif	/* IPV6 */
+}
+#endif
+
+#else /* CONFIG_SECURITY_NETWORK && CONFIG_NETFILTER */
+
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+#define selinux_nf_ip_exit()
+#endif
+
+#endif /* CONFIG_SECURITY_NETWORK && CONFIG_NETFILTER */
+
+#ifdef CONFIG_SECURITY_SELINUX_DISABLE
+int selinux_disable(void)
+{
+	extern void exit_sel_fs(void);
+	static int selinux_disabled = 0;
+
+	if (ss_initialized) {
+		/* Not permitted after initial policy load. */
+		return -EINVAL;
+	}
+
+	if (selinux_disabled) {
+		/* Only do this once. */
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "SELinux:  Disabled at runtime.\n");
+
+	selinux_disabled = 1;
+
+	/* Reset security_ops to the secondary module, dummy or capability. */
+	security_ops = secondary_ops;
+
+	/* Unregister netfilter hooks. */
+	selinux_nf_ip_exit();
+
+	/* Unregister selinuxfs. */
+	exit_sel_fs();
+
+	return 0;
+}
+#endif
+
+