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authorLinus Torvalds <torvalds@linux-foundation.org>2011-07-22 19:30:19 -0700
committerAl Viro <viro@zeniv.linux.org.uk>2011-07-25 14:23:39 -0400
commite77819e57f0817c6dc7cadd061acd70c604cbce2 (patch)
treef5d7aba2dfbb747a97d783b7cc6a486922c42559 /fs/generic_acl.c
parent3ca30d40a91fb9b9871e61d5dea2c1a895906a15 (diff)
downloadop-kernel-dev-e77819e57f0817c6dc7cadd061acd70c604cbce2.zip
op-kernel-dev-e77819e57f0817c6dc7cadd061acd70c604cbce2.tar.gz
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: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/generic_acl.c')
-rw-r--r--fs/generic_acl.c19
1 files changed, 7 insertions, 12 deletions
diff --git a/fs/generic_acl.c b/fs/generic_acl.c
index 70e90b4..4949473 100644
--- a/fs/generic_acl.c
+++ b/fs/generic_acl.c
@@ -192,18 +192,13 @@ generic_acl_chmod(struct inode *inode)
int
generic_check_acl(struct inode *inode, int mask)
{
- if (mask & MAY_NOT_BLOCK) {
- if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
- return -ECHILD;
- } else {
- struct posix_acl *acl;
-
- acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
- if (acl) {
- int error = posix_acl_permission(inode, acl, mask);
- posix_acl_release(acl);
- return error;
- }
+ struct posix_acl *acl;
+
+ acl = get_cached_acl(inode, ACL_TYPE_ACCESS);
+ if (acl) {
+ int error = posix_acl_permission(inode, acl, mask);
+ posix_acl_release(acl);
+ return error;
}
return -EAGAIN;
}
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