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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-22 19:30:19 -0700 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2011-07-25 14:23:39 -0400 |
| commit | e77819e57f0817c6dc7cadd061acd70c604cbce2 (patch) | |
| tree | f5d7aba2dfbb747a97d783b7cc6a486922c42559 /fs/generic_acl.c | |
| parent | 3ca30d40a91fb9b9871e61d5dea2c1a895906a15 (diff) | |
| download | op-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.c | 19 |
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; } |
