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| author | Christoph Hellwig <hch@infradead.org> | 2008-02-05 12:13:15 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@redback.melbourne.sgi.com> | 2008-02-07 18:22:24 +1100 |
| commit | f6aa7f2184330262e1cb5f7802536e5346bd46a3 (patch) | |
| tree | 73edcd57933b033bf69e6ae5cf46e102b47b41cb /fs | |
| parent | 35fec8df65217546f6d9d508b203c1d135a67fbc (diff) | |
| download | linux-f6aa7f2184330262e1cb5f7802536e5346bd46a3.tar.gz linux-f6aa7f2184330262e1cb5f7802536e5346bd46a3.tar.bz2 linux-f6aa7f2184330262e1cb5f7802536e5346bd46a3.zip | |
[XFS] stop re-checking permissions in xfs_swapext
xfs_swapext should simplify check if we have a writeable file descriptor
instead of re-checking the permissions using xfs_iaccess. Add an
additional check to refuse O_APPEND file descriptors because swapext is
not an append-only write operation.
SGI-PV: 971186
SGI-Modid: xfs-linux-melb:xfs-kern:30369a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_dfrag.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/fs/xfs/xfs_dfrag.c b/fs/xfs/xfs_dfrag.c index 5d3285952ff7..3f53fad356a3 100644 --- a/fs/xfs/xfs_dfrag.c +++ b/fs/xfs/xfs_dfrag.c @@ -74,12 +74,23 @@ xfs_swapext( goto out_free_sxp; } + if (!(file->f_mode & FMODE_WRITE) || (file->f_flags & O_APPEND)) { + error = XFS_ERROR(EBADF); + goto out_put_file; + } + target_file = fget((int)sxp->sx_fdtmp); if (!target_file) { error = XFS_ERROR(EINVAL); goto out_put_file; } + if (!(target_file->f_mode & FMODE_WRITE) || + (target_file->f_flags & O_APPEND)) { + error = XFS_ERROR(EBADF); + goto out_put_target_file; + } + ip = XFS_I(file->f_path.dentry->d_inode); tip = XFS_I(target_file->f_path.dentry->d_inode); @@ -154,15 +165,6 @@ xfs_swap_extents( xfs_lock_inodes(ips, 2, 0, lock_flags); locked = 1; - /* Check permissions */ - error = xfs_iaccess(ip, S_IWUSR, NULL); - if (error) - goto error0; - - error = xfs_iaccess(tip, S_IWUSR, NULL); - if (error) - goto error0; - /* Verify that both files have the same format */ if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) { error = XFS_ERROR(EINVAL); |