[AppArmor 08/44] Pass struct vfsmount to the inode_mknod LSM hook

[jjohansen@xxxxxxx]

This is needed for computing pathnames in the AppArmor LSM.

Signed-off-by: Tony Jones <tonyj@xxxxxxx>
Signed-off-by: Andreas Gruenbacher <agruen@xxxxxxx>
Signed-off-by: John Johansen <jjohansen@xxxxxxx>

---
 fs/namei.c               |    2 +-
 include/linux/security.h |    7 +++++--
 security/dummy.c         |    2 +-
 security/selinux/hooks.c |    5 +++--
 4 files changed, 10 insertions(+), 6 deletions(-)

--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1869,7 +1869,7 @@ int vfs_mknod(struct inode *dir, struct 
 	if (!dir->i_op || !dir->i_op->mknod)
 		return -EPERM;
 
-	error = security_inode_mknod(dir, dentry, mode, dev);
+	error = security_inode_mknod(dir, dentry, mnt, mode, dev);
 	if (error)
 		return error;
 
--- a/include/linux/security.h
+++ b/include/linux/security.h
@@ -323,6 +323,7 @@ struct request_sock;
  *	and not this hook.
  *	@dir contains the inode structure of parent of the new file.
  *	@dentry contains the dentry structure of the new file.
+ *	@mnt is the vfsmount corresponding to @dentry (may be NULL).
  *	@mode contains the mode of the new file.
  *	@dev contains the device number.
  *	Return 0 if permission is granted.
@@ -1218,7 +1219,7 @@ struct security_operations {
 			    struct vfsmount *mnt, int mode);
 	int (*inode_rmdir) (struct inode *dir, struct dentry *dentry);
 	int (*inode_mknod) (struct inode *dir, struct dentry *dentry,
-	                    int mode, dev_t dev);
+			    struct vfsmount *mnt, int mode, dev_t dev);
 	int (*inode_rename) (struct inode *old_dir, struct dentry *old_dentry,
 	                     struct inode *new_dir, struct dentry *new_dentry);
 	int (*inode_readlink) (struct dentry *dentry);
@@ -1670,11 +1671,12 @@ static inline int security_inode_rmdir (
 
 static inline int security_inode_mknod (struct inode *dir,
 					struct dentry *dentry,
+					struct vfsmount *mnt,
 					int mode, dev_t dev)
 {
 	if (unlikely (IS_PRIVATE (dir)))
 		return 0;
-	return security_ops->inode_mknod (dir, dentry, mode, dev);
+	return security_ops->inode_mknod (dir, dentry, mnt, mode, dev);
 }
 
 static inline int security_inode_rename (struct inode *old_dir,
@@ -2388,6 +2390,7 @@ static inline int security_inode_rmdir (
 
 static inline int security_inode_mknod (struct inode *dir,
 					struct dentry *dentry,
+					struct vfsmount *mnt,
 					int mode, dev_t dev)
 {
 	return 0;
--- a/security/dummy.c
+++ b/security/dummy.c
@@ -299,7 +299,7 @@ static int dummy_inode_rmdir (struct ino
 }
 
 static int dummy_inode_mknod (struct inode *inode, struct dentry *dentry,
-			      int mode, dev_t dev)
+			      struct vfsmount *mnt, int mode, dev_t dev)
 {
 	return 0;
 }
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -2218,11 +2218,12 @@ static int selinux_inode_rmdir(struct in
 	return may_link(dir, dentry, MAY_RMDIR);
 }
 
-static int selinux_inode_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+static int selinux_inode_mknod(struct inode *dir, struct dentry *dentry,
+			       struct vfsmount *mnt, int mode, dev_t dev)
 {
 	int rc;
 
-	rc = secondary_ops->inode_mknod(dir, dentry, mode, dev);
+	rc = secondary_ops->inode_mknod(dir, dentry, mnt, mode, dev);
 	if (rc)
 		return rc;
 

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