Pass struct vfsmount to the inode_unlink 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
@@ -2106,7 +2106,7 @@ int vfs_unlink(struct inode *dir, struct
 	if (d_mountpoint(dentry))
 		error = -EBUSY;
 	else {
-		error = security_inode_unlink(dir, dentry);
+		error = security_inode_unlink(dir, mnt, dentry);
 		if (!error)
 			error = dir->i_op->unlink(dir, dentry);
 	}
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
@@ -297,6 +297,7 @@ struct request_sock;
  * @inode_unlink:
  *	Check the permission to remove a hard link to a file. 
  *	@dir contains the inode structure of parent directory of the file.
+ *	@mnt is the vfsmount where the dentry was looked up (may be NULL)
  *	@dentry contains the dentry structure for file to be unlinked.
  *	Return 0 if permission is granted.
  * @inode_symlink:
@@ -1226,7 +1227,8 @@ struct security_operations {
 	int (*inode_link) (struct vfsmount *old_mnt, struct dentry *old_dentry,
 	                   struct inode *dir, struct vfsmount *new_mnt,
 			   struct dentry *new_dentry);
-	int (*inode_unlink) (struct inode *dir, struct dentry *dentry);
+	int (*inode_unlink) (struct inode *dir, struct vfsmount *mnt,
+			     struct dentry *dentry);
 	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,
@@ -1654,11 +1656,12 @@ static inline int security_inode_link (s
 }
 
 static inline int security_inode_unlink (struct inode *dir,
+					 struct vfsmount *mnt,
 					 struct dentry *dentry)
 {
 	if (unlikely (IS_PRIVATE (dentry->d_inode)))
 		return 0;
-	return security_ops->inode_unlink (dir, dentry);
+	return security_ops->inode_unlink (dir, mnt, dentry);
 }
 
 static inline int security_inode_symlink (struct inode *dir,
@@ -2386,6 +2389,7 @@ static inline int security_inode_link (s
 }
 
 static inline int security_inode_unlink (struct inode *dir,
+					 struct vfsmount *mnt,
 					 struct dentry *dentry)
 {
 	return 0;
Index: linux-2.6.19/security/dummy.c
===================================================================
--- linux-2.6.19.orig/security/dummy.c
+++ linux-2.6.19/security/dummy.c
@@ -278,7 +278,8 @@ static int dummy_inode_link (struct vfsm
 	return 0;
 }
 
-static int dummy_inode_unlink (struct inode *inode, struct dentry *dentry)
+static int dummy_inode_unlink (struct inode *inode, struct vfsmount *mnt,
+			       struct dentry *dentry)
 {
 	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
@@ -2149,11 +2149,12 @@ static int selinux_inode_link(struct vfs
 	return may_link(dir, old_dentry, MAY_LINK);
 }
 
-static int selinux_inode_unlink(struct inode *dir, struct dentry *dentry)
+static int selinux_inode_unlink(struct inode *dir, struct vfsmount *mnt,
+				struct dentry *dentry)
 {
 	int rc;
 
-	rc = secondary_ops->inode_unlink(dir, dentry);
+	rc = secondary_ops->inode_unlink(dir, mnt, dentry);
 	if (rc)
 		return rc;
 	return may_link(dir, dentry, MAY_UNLINK);