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xfs: fix delalloc quota accounting on failure

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xfstest 270 was causing quota reservations way beyond what was sane
(ten to hundreds of TB) for a 4GB filesystem. There's a sign problem
in the error handling path of xfs_bmapi_reserve_delalloc() because
xfs_trans_unreserve_quota_nblks() simple negates the value passed -
which doesn't work for an unsigned variable. This causes
reservations of close to 2^32 block instead of removing a
reservation of a handful of blocks.

Fix the same problem in the other xfs_trans_unreserve_quota_nblks()
callers where unsigned integer variables are used, too.

Signed-off-by: Dave Chinner <[email protected]>
Reviewed-by: Eric Sandeen <[email protected]>
Signed-off-by: Ben Myers <[email protected]>
This commit is contained in:
Dave Chinner 2012-05-08 20:48:53 +10:00 • committed by Ben Myers
commit ea562ed6e7
3 changed files with 3 additions and 3 deletions
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2
fs/xfs/xfs_bmap.c
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@ -4526,7 +4526,7 @@ out_unreserve_blocks:
xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, alen, 0);
out_unreserve_quota:
if (XFS_IS_QUOTA_ON(mp))
xfs_trans_unreserve_quota_nblks(NULL, ip, alen, 0, rt ?
xfs_trans_unreserve_quota_nblks(NULL, ip, (long)alen, 0, rt ?
XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS);
return error;
}

2
fs/xfs/xfs_iomap.c
View file

@ -246,7 +246,7 @@ out_unlock:
out_bmap_cancel:
xfs_bmap_cancel(&free_list);
xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag);
xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
out_trans_cancel:
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
goto out_unlock;

2
fs/xfs/xfs_vnodeops.c
View file

@ -1916,7 +1916,7 @@ xfs_alloc_file_space(
error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */
xfs_bmap_cancel(&free_list);
xfs_trans_unreserve_quota_nblks(tp, ip, qblocks, 0, quota_flag);
xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
error1: /* Just cancel transaction */
xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);