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Commit 880566e1 authored by Nick Piggin's avatar Nick Piggin
Browse files

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: default avatarNick Piggin <npiggin@kernel.dk>
parent 258a5aa8

fs/xfs/linux-2.6/xfs_acl.c

+6 −3
Original line number Diff line number Diff line
@@ -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);