[XFS] Fix compat XFS_IOC_FSBULKSTAT_SINGLE ioctl

The XFS_IOC_FSBULKSTAT_SINGLE ioctl passes in the
desired inode number, while XFS_IOC_FSBULKSTAT passes
in the previous/last-stat'd inode number.  The
compat handler wasn't differentiating these, so
when a XFS_IOC_FSBULKSTAT_SINGLE request for inode
128 was sent in, stat information for 131 was sent out.

Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/fs/xfs/linux-2.6/xfs_ioctl32.c b/fs/xfs/linux-2.6/xfs_ioctl32.c
index 2d336062831d..cc1fe96efab5 100644
--- a/fs/xfs/linux-2.6/xfs_ioctl32.c
+++ b/fs/xfs/linux-2.6/xfs_ioctl32.c
@@ -291,15 +291,22 @@ xfs_compat_ioc_bulkstat(
         if (bulkreq.ubuffer == NULL)
                 return -XFS_ERROR(EINVAL);
 
-        if (cmd == XFS_IOC_FSINUMBERS_32)
+        if (cmd == XFS_IOC_FSINUMBERS_32) {
                 error = xfs_inumbers(mp, &inlast, &count,
                                 bulkreq.ubuffer, xfs_inumbers_fmt_compat);
-        else {
+        } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
+                int res;
+
+                error = xfs_bulkstat_one_compat(mp, inlast, bulkreq.ubuffer,
+                                sizeof(compat_xfs_bstat_t),
+                                NULL, 0, NULL, NULL, &res);
+        } else if (cmd == XFS_IOC_FSBULKSTAT_32) {
                 error = xfs_bulkstat(mp, &inlast, &count,
                         xfs_bulkstat_one_compat, NULL,
                         sizeof(compat_xfs_bstat_t), bulkreq.ubuffer,
                         BULKSTAT_FG_QUICK, &done);
-        }
+        } else
+                error = XFS_ERROR(EINVAL);
         if (error)
                 return -error;