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ext2,3,4: provide simple rcu-walk ACL implementation

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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 <[email protected]>
This commit is contained in:
Nick Piggin 2011-01-07 17:50:00 +11:00
commit 73598611ad
3 changed files with 15 additions and 6 deletions
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7
fs/ext2/acl.c
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@ -236,8 +236,11 @@ ext2_check_acl(struct inode *inode, int mask, unsigned int flags)
{
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))