Commit e77819e5 authored by Linus Torvalds's avatar Linus Torvalds Committed by Al Viro
Browse files

vfs: move ACL cache lookup into generic code 



This moves logic for checking the cached ACL values from low-level
filesystems into generic code.  The end result is a streamlined ACL
check that doesn't need to load the inode->i_op->check_acl pointer at
all for the common cached case.

The filesystems also don't need to check for a non-blocking RCU walk
case in their acl_check() functions, because that is all handled at a
VFS layer.

Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 3ca30d40

fs/9p/acl.c

+0 −3
Original line number Diff line number Diff line
@@ -101,9 +101,6 @@ int v9fs_check_acl(struct inode *inode, int mask) 
	struct posix_acl *acl;

	struct v9fs_session_info *v9ses;



	if (mask & MAY_NOT_BLOCK)

		return -ECHILD;



	v9ses = v9fs_inode2v9ses(inode);

	if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||

			((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {

fs/btrfs/acl.c

+7 −12
Original line number Diff line number Diff line
@@ -198,12 +198,8 @@ out: 
int btrfs_check_acl(struct inode *inode, int mask)

{

	int error = -EAGAIN;



	if (mask & MAY_NOT_BLOCK) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			error = -ECHILD;

	} else {

	struct posix_acl *acl;



	acl = btrfs_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))

		return PTR_ERR(acl);
@@ -211,7 +207,6 @@ int btrfs_check_acl(struct inode *inode, int mask) 
		error = posix_acl_permission(inode, acl, mask);

		posix_acl_release(acl);

	}

	}



	return error;

}

fs/ext2/acl.c

+0 −6
Original line number Diff line number Diff line
@@ -236,12 +236,6 @@ ext2_check_acl(struct inode *inode, int mask) 
{

	struct posix_acl *acl;



	if (mask & MAY_NOT_BLOCK) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			return -ECHILD;

		return -EAGAIN;

	}



	acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))

		return PTR_ERR(acl);

fs/ext3/acl.c

+0 −6
Original line number Diff line number Diff line
@@ -244,12 +244,6 @@ ext3_check_acl(struct inode *inode, int mask) 
{

	struct posix_acl *acl;



	if (mask & MAY_NOT_BLOCK) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			return -ECHILD;

		return -EAGAIN;

	}



	acl = ext3_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))

		return PTR_ERR(acl);

fs/ext4/acl.c

+0 −6
Original line number Diff line number Diff line
@@ -242,12 +242,6 @@ ext4_check_acl(struct inode *inode, int mask) 
{

	struct posix_acl *acl;



	if (mask & MAY_NOT_BLOCK) {

		if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))

			return -ECHILD;

		return -EAGAIN;

	}



	acl = ext4_get_acl(inode, ACL_TYPE_ACCESS);

	if (IS_ERR(acl))

		return PTR_ERR(acl);

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