Pass struct vfsmount to the inode_symlink LSM hook.

Signed-off-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>

Index: linux-2.6.19/fs/namei.c
===================================================================
--- linux-2.6.19.orig/fs/namei.c
+++ linux-2.6.19/fs/namei.c
@@ -2200,7 +2200,7 @@ int vfs_symlink(struct inode *dir, struc
 	if (!dir->i_op || !dir->i_op->symlink)
 		return -EPERM;
 
-	error = security_inode_symlink(dir, dentry, oldname);
+	error = security_inode_symlink(dir, mnt, dentry, oldname);
 	if (error)
 		return error;
 
Index: linux-2.6.19/include/linux/security.h
===================================================================
--- linux-2.6.19.orig/include/linux/security.h
+++ linux-2.6.19/include/linux/security.h
@@ -300,6 +300,7 @@ struct request_sock;
  * @inode_symlink:
  *	Check the permission to create a symbolic link to a file.
  *	@dir contains the inode structure of parent directory of the symbolic link.
+ *	@mnt is the vfsmount of the new dentry (may be NULL)
  *	@dentry contains the dentry structure of the symbolic link.
  *	@old_name contains the pathname of file.
  *	Return 0 if permission is granted.
@@ -1221,7 +1222,7 @@ struct security_operations {
 	int (*inode_link) (struct dentry *old_dentry,
 	                   struct inode *dir, struct dentry *new_dentry);
 	int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
-	int (*inode_symlink) (struct inode *dir,
+	int (*inode_symlink) (struct inode *dir, struct vfsmount *mnt,
 	                      struct dentry *dentry, const char *old_name);
 	int (*inode_mkdir) (struct inode *dir, struct vfsmount *mnt,
 			    struct dentry *dentry, int mode);
@@ -1652,12 +1653,13 @@ static inline int security_inode_unlink 
 }
 
 static inline int security_inode_symlink (struct inode *dir,
+					  struct vfsmount *mnt,
 					  struct dentry *dentry,
 					  const char *old_name)
 {
 	if (unlikely (IS_PRIVATE (dir)))
 		return 0;
-	return security_ops->inode_symlink (dir, dentry, old_name);
+	return security_ops->inode_symlink (dir, mnt, dentry, old_name);
 }
 
 static inline int security_inode_mkdir (struct inode *dir,
@@ -2377,6 +2379,7 @@ static inline int security_inode_unlink 
 }
 
 static inline int security_inode_symlink (struct inode *dir,
+					  struct vfsmount *mnt,
 					  struct dentry *dentry,
 					  const char *old_name)
 {
Index: linux-2.6.19/security/dummy.c
===================================================================
--- linux-2.6.19.orig/security/dummy.c
+++ linux-2.6.19/security/dummy.c
@@ -281,8 +281,8 @@ static int dummy_inode_unlink (struct in
 	return 0;
 }
 
-static int dummy_inode_symlink (struct inode *inode, struct dentry *dentry,
-				const char *name)
+static int dummy_inode_symlink (struct inode *inode, struct vfsmount *mnt,
+				struct dentry *dentry, const char *name)
 {
 	return 0;
 }
Index: linux-2.6.19/security/selinux/hooks.c
===================================================================
--- linux-2.6.19.orig/security/selinux/hooks.c
+++ linux-2.6.19/security/selinux/hooks.c
@@ -2155,7 +2155,8 @@ static int selinux_inode_unlink(struct i
 	return may_link(dir, dentry, MAY_UNLINK);
 }
 
-static int selinux_inode_symlink(struct inode *dir, struct dentry *dentry, const char *name)
+static int selinux_inode_symlink(struct inode *dir, struct vfsmount *mnt,
+				 struct dentry *dentry, const char *name)
 {
 	return may_create(dir, dentry, SECCLASS_LNK_FILE);
 }