From 64c23e86873ee410554d6d1c76b60da47025e96f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 14 Jan 2011 13:07:30 +0100
Subject: make the feature checks in ->fallocate future proof

Instead of various home grown checks that might need updates for new
flags just check for any bit outside the mask of the features supported
by the filesystem.  This makes the check future proof for any newly
added flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/xfs/linux-2.6/xfs_iops.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'fs/xfs')

diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c
index da54403..a4ecc21 100644
--- a/fs/xfs/linux-2.6/xfs_iops.c
+++ b/fs/xfs/linux-2.6/xfs_iops.c
@@ -518,6 +518,9 @@ xfs_vn_fallocate(
 	xfs_inode_t	*ip = XFS_I(inode);
 	int		cmd = XFS_IOC_RESVSP;
 
+	if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+		return -EOPNOTSUPP;
+
 	/* preallocation on directories not yet supported */
 	error = -ENODEV;
 	if (S_ISDIR(inode->i_mode))
-- 
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