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xfs: refactor xfs_bmap_add_extent_hole_real

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Use xfs_iext_update_extent to update entries in the in-core extent list.
This isolates the function from the detailed layout of the extent list,
and generally makes the code a lot more readable.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2017-10-17 14:16:24 -07:00 committed by Darrick J. Wong
parent 3ffc18ecd3
commit 1abb9e5532
1 changed files with 21 additions and 27 deletions
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48
fs/xfs/libxfs/xfs_bmap.c
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@ -2847,6 +2847,7 @@ xfs_bmap_add_extent_hole_real(
xfs_bmbt_irec_t right; /* right neighbor extent entry */
int rval=0; /* return value (logging flags) */
int state; /* state bits, accessed thru macros */
struct xfs_bmbt_irec old;
ASSERT(*idx >= 0);
ASSERT(*idx <= xfs_iext_count(ifp));
@ -2916,9 +2917,8 @@ xfs_bmap_add_extent_hole_real(
*/
--*idx;
trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
left.br_blockcount + new->br_blockcount +
right.br_blockcount);
left.br_blockcount += new->br_blockcount + right.br_blockcount;
xfs_iext_update_extent(ifp, *idx, &left);
trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
xfs_iext_remove(ip, *idx + 1, 1, state);
@ -2945,10 +2945,7 @@ xfs_bmap_add_extent_hole_real(
XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
error = xfs_bmbt_update(cur, left.br_startoff,
left.br_startblock,
left.br_blockcount +
new->br_blockcount +
right.br_blockcount,
left.br_state);
left.br_blockcount, left.br_state);
if (error)
goto done;
}
@ -2961,26 +2958,25 @@ xfs_bmap_add_extent_hole_real(
* Merge the new allocation with the left neighbor.
*/
--*idx;
old = left;
trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
xfs_bmbt_set_blockcount(xfs_iext_get_ext(ifp, *idx),
left.br_blockcount + new->br_blockcount);
left.br_blockcount += new->br_blockcount;
xfs_iext_update_extent(ifp, *idx, &left);
trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
if (cur == NULL) {
rval = xfs_ilog_fext(whichfork);
} else {
rval = 0;
error = xfs_bmbt_lookup_eq(cur, left.br_startoff,
left.br_startblock, left.br_blockcount,
error = xfs_bmbt_lookup_eq(cur, old.br_startoff,
old.br_startblock, old.br_blockcount,
&i);
if (error)
goto done;
XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
error = xfs_bmbt_update(cur, left.br_startoff,
left.br_startblock,
left.br_blockcount +
new->br_blockcount,
left.br_state);
left.br_blockcount, left.br_state);
if (error)
goto done;
}
@ -2992,29 +2988,27 @@ xfs_bmap_add_extent_hole_real(
* on the right.
* Merge the new allocation with the right neighbor.
*/
old = right;
trace_xfs_bmap_pre_update(ip, *idx, state, _THIS_IP_);
xfs_bmbt_set_allf(xfs_iext_get_ext(ifp, *idx),
new->br_startoff, new->br_startblock,
new->br_blockcount + right.br_blockcount,
right.br_state);
right.br_startoff = new->br_startoff;
right.br_startblock = new->br_startblock;
right.br_blockcount += new->br_blockcount;
xfs_iext_update_extent(ifp, *idx, &right);
trace_xfs_bmap_post_update(ip, *idx, state, _THIS_IP_);
if (cur == NULL) {
rval = xfs_ilog_fext(whichfork);
} else {
rval = 0;
error = xfs_bmbt_lookup_eq(cur,
right.br_startoff,
right.br_startblock,
right.br_blockcount, &i);
error = xfs_bmbt_lookup_eq(cur, old.br_startoff,
old.br_startblock, old.br_blockcount,
&i);
if (error)
goto done;
XFS_WANT_CORRUPTED_GOTO(mp, i == 1, done);
error = xfs_bmbt_update(cur, new->br_startoff,
new->br_startblock,
new->br_blockcount +
right.br_blockcount,
right.br_state);
error = xfs_bmbt_update(cur, right.br_startoff,
right.br_startblock,
right.br_blockcount, right.br_state);
if (error)
goto done;
}