From: Nick Piggin Date: Fri, 7 Jan 2011 06:50:02 +0000 (+1100) Subject: xfs: provide simple rcu-walk ACL implementation X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=880566e17c4fce0d998d92610d32fcb9506aa6dd;p=openwrt%2Fstaging%2Fblogic.git xfs: 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 --- diff --git a/fs/xfs/linux-2.6/xfs_acl.c b/fs/xfs/linux-2.6/xfs_acl.c index 4b11eaf6a580..39f4f809bb68 100644 --- a/fs/xfs/linux-2.6/xfs_acl.c +++ b/fs/xfs/linux-2.6/xfs_acl.c @@ -225,9 +225,6 @@ xfs_check_acl(struct inode *inode, int mask, unsigned int flags) struct posix_acl *acl; int error = -EAGAIN; - if (flags & IPERM_FLAG_RCU) - return -ECHILD; - ip = XFS_I(inode); trace_xfs_check_acl(ip); @@ -238,6 +235,12 @@ xfs_check_acl(struct inode *inode, int mask, unsigned int flags) if (!XFS_IFORK_Q(ip)) return -EAGAIN; + if (flags & IPERM_FLAG_RCU) { + if (!negative_cached_acl(inode, ACL_TYPE_ACCESS)) + return -ECHILD; + return -EAGAIN; + } + acl = xfs_get_acl(inode, ACL_TYPE_ACCESS); if (IS_ERR(acl)) return PTR_ERR(acl);