ext2,3,4: provide simple rcu-walk ACL implementation
This simple implementation just checks for no ACLs on the inode, and
if so, then the rcu-walk may proceed, otherwise fail it.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/ext2/acl.c b/fs/ext2/acl.c
index dd9bb3f..7b41805 100644
--- a/fs/ext2/acl.c
+++ b/fs/ext2/acl.c
@@ -236,8 +236,11 @@
{
struct posix_acl *acl;
- if (flags & IPERM_FLAG_RCU)
- return -ECHILD;
+ if (flags & IPERM_FLAG_RCU) {
+ if (!negative_cached_acl(inode, ACL_TYPE_ACCESS))
+ return -ECHILD;
+ return -EAGAIN;
+ }
acl = ext2_get_acl(inode, ACL_TYPE_ACCESS);
if (IS_ERR(acl))