[PATCH] Disallow 32bit project quota id.

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Currently on-disk structure is able to keep only 16bit project quota id,
so disallow 32bit ones. This fixes a problem where parts of kernel
structures holding project quota id are 32bit while parts (on-disk)
are 16bit variables which causes project quota member files to be
inaccessible for some operations (like mv/rm).

Signed-off-by: Arkadiusz Miśkiewicz <arekm@xxxxxxxx>
---

Issues solved:
- FSX_PROJID in mask is checked
- 80 column issue fixed
- checkpath.pl checked


 fs/xfs/linux-2.6/xfs_ioctl.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/fs/xfs/linux-2.6/xfs_ioctl.c b/fs/xfs/linux-2.6/xfs_ioctl.c
index 237f5ff..4fec427 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl.c
@@ -907,6 +907,13 @@ xfs_ioctl_setattr(
 		return XFS_ERROR(EIO);
 
 	/*
+	 * Disallow 32bit project ids because on-disk structure
+	 * is 16bit only.
+	 */
+	if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1))
+		return XFS_ERROR(EINVAL);
+
+	/*
 	 * If disk quotas is on, we make sure that the dquots do exist on disk,
 	 * before we start any other transactions. Trying to do this later
 	 * is messy. We don't care to take a readlock to look at the ids
-- 
1.7.2.2

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