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xfs: introduce xfs_mod_frextents

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Add a new helper to modify the incore counter of free realtime
extents. This matches the helpers used for inode and data block
counters, and removes a significant users of the xfs_mod_incore_sb()
interface.

Based on a patch originally from Christoph Hellwig.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner
2015-02-23 21:22:54 +11:00
committed by Dave Chinner
parent 5681ca4006
commit bab98bbe6e
4 changed files with 34 additions and 21 deletions
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18
fs/xfs/xfs_trans.c
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@@ -235,8 +235,7 @@ xfs_trans_reserve(
* fail if the count would go below zero.
*/
if (rtextents > 0) {
error = xfs_mod_incore_sb(tp->t_mountp, XFS_SBS_FREXTENTS,
-((int64_t)rtextents), rsvd);
error = xfs_mod_frextents(tp->t_mountp, -((int64_t)rtextents));
if (error) {
error = -ENOSPC;
goto undo_log;
@@ -562,10 +561,10 @@ xfs_trans_unreserve_and_mod_sb(
}
/* apply remaining deltas */
if (rtxdelta != 0) {
msbp->msb_field = XFS_SBS_FREXTENTS;
msbp->msb_delta = rtxdelta;
msbp++;
if (rtxdelta) {
error = xfs_mod_frextents(mp, rtxdelta);
if (error)
goto out_undo_ifree;
}
if (tp->t_flags & XFS_TRANS_SB_DIRTY) {
@@ -618,12 +617,15 @@ xfs_trans_unreserve_and_mod_sb(
error = xfs_mod_incore_sb_batch(tp->t_mountp, msb,
(uint)(msbp - msb), rsvd);
if (error)
goto out_undo_ifreecount;
goto out_undo_frextents;
}
return;
out_undo_ifreecount:
out_undo_frextents:
if (rtxdelta)
xfs_mod_frextents(mp, -rtxdelta);
out_undo_ifree:
if (ifreedelta)
xfs_mod_ifree(mp, -ifreedelta);
out_undo_icount: