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xfs: remove impossible to read code in xfs_bmap_add_extent_delay_real

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We already have the worst case blocks reserved, so xfs_icsb_modify_counters
won't fail in xfs_bmap_add_extent_delay_real.  In fact we've had an assert
to catch this case since day and it never triggered.  So remove the code
to try smaller reservations, and just return the error for that case in
addition to keeping the assert.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
This commit is contained in:
Christoph Hellwig 2011-09-18 20:40:42 +00:00 committed by Alex Elder
parent e7455e02e5
commit b9b984d784
1 changed files with 8 additions and 27 deletions
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35
fs/xfs/xfs_bmap.c
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@ -1045,34 +1045,15 @@ xfs_bmap_add_extent_delay_real(
temp2 = xfs_bmap_worst_indlen(ip, temp2);
diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
(cur ? cur->bc_private.b.allocated : 0));
if (diff > 0 &&
xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS,
-((int64_t)diff), 0)) {
/*
* Ick gross gag me with a spoon.
*/
ASSERT(0); /* want to see if this ever happens! */
while (diff > 0) {
if (temp) {
temp--;
diff--;
if (!diff ||
!xfs_icsb_modify_counters(ip->i_mount,
XFS_SBS_FDBLOCKS,
-((int64_t)diff), 0))
break;
}
if (temp2) {
temp2--;
diff--;
if (!diff ||
!xfs_icsb_modify_counters(ip->i_mount,
XFS_SBS_FDBLOCKS,
-((int64_t)diff), 0))
break;
}
}
if (diff > 0) {
error = xfs_icsb_modify_counters(ip->i_mount,
XFS_SBS_FDBLOCKS,
-((int64_t)diff), 0);
ASSERT(!error);
if (error)
goto done;
}
ep = xfs_iext_get_ext(ifp, *idx);
xfs_bmbt_set_startblock(ep, nullstartblock((int)temp));
trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);