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xfs: propagate bmap updates to rmapbt

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When we map, unmap, or convert an extent in a file's data or attr
fork, schedule a respective update in the rmapbt.  Previous versions
of this patch required a 1:1 correspondence between bmap and rmap,
but this is no longer true as we now have ability to make interval
queries against the rmapbt.

We use the deferred operations code to handle redo operations
atomically and deadlock free.  This plumbs in all five rmap actions
(map, unmap, convert extent, alloc, free); we'll use the first three
now for file data, and reflink will want the last two.  We also add
an error injection site to test log recovery.

Finally, we need to fix the bmap shift extent code to adjust the
rmaps correctly.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
2016-08-03 12:16:05 +10:00
committed by Dave Chinner
parent f8dbebef98
commit 9c19464469
8 changed files with 400 additions and 16 deletions
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fs/xfs/xfs_trans_rmap.c
+9 -4
View File
@@ -171,14 +171,15 @@ xfs_trans_log_finish_rmap_update(
xfs_fileoff_t startoff,
xfs_fsblock_t startblock,
xfs_filblks_t blockcount,
xfs_exntst_t state)
xfs_exntst_t state,
struct xfs_btree_cur **pcur)
{
uint next_extent;
struct xfs_map_extent *rmap;
int error;
/* XXX: actually finish the rmap update here */
error = -EFSCORRUPTED;
error = xfs_rmap_finish_one(tp, type, owner, whichfork, startoff,
startblock, blockcount, state, pcur);
/*
* Mark the transaction dirty, even on error. This ensures the
@@ -276,7 +277,8 @@ xfs_rmap_update_finish_item(
rmap->ri_bmap.br_startoff,
rmap->ri_bmap.br_startblock,
rmap->ri_bmap.br_blockcount,
rmap->ri_bmap.br_state);
rmap->ri_bmap.br_state,
(struct xfs_btree_cur **)state);
kmem_free(rmap);
return error;
}
@@ -288,6 +290,9 @@ xfs_rmap_update_finish_cleanup(
void *state,
int error)
{
struct xfs_btree_cur *rcur = state;
xfs_rmap_finish_one_cleanup(tp, rcur, error);
}
/* Abort all pending RUIs. */