fs: take the ACL checks to common code
Replace the ->check_acl method with a ->get_acl method that simply reads an
ACL from disk after having a cache miss. This means we can replace the ACL
checking boilerplate code with a single implementation in namei.c.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting
index 7f8861d..b4a3d76 100644
--- a/Documentation/filesystems/porting
+++ b/Documentation/filesystems/porting
@@ -407,10 +407,11 @@
--
[mandatory]
- ->permission(), generic_permission() and ->check_acl() have lost flags
+ ->permission() and generic_permission()have lost flags
argument; instead of passing IPERM_FLAG_RCU we add MAY_NOT_BLOCK into mask.
- generic_permission() has also lost the check_acl argument; if you want
-non-NULL to be used for that inode, put it into ->i_op->check_acl.
+ generic_permission() has also lost the check_acl argument; ACL checking
+has been taken to VFS and filesystems need to provide a non-NULL ->i_op->get_acl
+to read an ACL from disk.
--
[mandatory]