acl: remove a slew of now unused helpers

Now that the posix acl api is active we can remove all the hacky helpers
we had to keep around for all these years and also remove the set and
get posix acl xattr handler methods as they aren't needed anymore.
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>

fs/xattr.c

@@ -454,10 +454,7 @@ vfs_getxattr(struct user_namespace *mnt_userns, struct dentry *dentry,
 		return ret;
 	}
 nolsm:
-	error = __vfs_getxattr(dentry, inode, name, value, size);
-	if (error > 0 && is_posix_acl_xattr(name))
-		posix_acl_getxattr_idmapped_mnt(mnt_userns, inode, value, size);
-	return error;
+	return __vfs_getxattr(dentry, inode, name, value, size);
 }
 EXPORT_SYMBOL_GPL(vfs_getxattr);
 

include/linux/posix_acl_xattr.h

@@ -35,11 +35,6 @@ posix_acl_xattr_count(size_t size)
 #ifdef CONFIG_FS_POSIX_ACL
 struct posix_acl *posix_acl_from_xattr(struct user_namespace *user_ns,
 				       const void *value, size_t size);
-void posix_acl_fix_xattr_from_user(void *value, size_t size);
-void posix_acl_fix_xattr_to_user(void *value, size_t size);
-void posix_acl_getxattr_idmapped_mnt(struct user_namespace *mnt_userns,
-				     const struct inode *inode,
-				     void *value, size_t size);
 ssize_t vfs_posix_acl_to_xattr(struct user_namespace *mnt_userns,
 			       struct inode *inode, const struct posix_acl *acl,
 			       void *buffer, size_t size);
@@ -50,18 +45,6 @@ posix_acl_from_xattr(struct user_namespace *user_ns, const void *value,
 {
 	return ERR_PTR(-EOPNOTSUPP);
 }
-static inline void posix_acl_fix_xattr_from_user(void *value, size_t size)
-{
-}
-static inline void posix_acl_fix_xattr_to_user(void *value, size_t size)
-{
-}
-static inline void
-posix_acl_getxattr_idmapped_mnt(struct user_namespace *mnt_userns,
-				const struct inode *inode, void *value,
-				size_t size)
-{
-}
 static inline ssize_t vfs_posix_acl_to_xattr(struct user_namespace *mnt_userns,
 					     struct inode *inode,
 					     const struct posix_acl *acl,
@@ -73,9 +56,6 @@ static inline ssize_t vfs_posix_acl_to_xattr(struct user_namespace *mnt_userns,
 
 int posix_acl_to_xattr(struct user_namespace *user_ns,
 		       const struct posix_acl *acl, void *buffer, size_t size);
-struct posix_acl *vfs_set_acl_prepare(struct user_namespace *mnt_userns,
-				      struct user_namespace *fs_userns,
-				      const void *value, size_t size);
 static inline const char *posix_acl_xattr_name(int type)
 {
 	switch (type) {