diff options
Diffstat (limited to 'fs/xfs/xfs_reflink.c')
| -rw-r--r-- | fs/xfs/xfs_reflink.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index ab2270a87196..37e603bf1591 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -170,6 +170,8 @@ xfs_reflink_find_shared( error = xfs_alloc_read_agf(mp, tp, agno, 0, &agbp); if (error) return error; + if (!agbp) + return -ENOMEM; cur = xfs_refcountbt_init_cursor(mp, tp, agbp, agno, NULL); @@ -329,7 +331,7 @@ xfs_reflink_convert_cow_extent( xfs_filblks_t count_fsb, struct xfs_defer_ops *dfops) { - xfs_fsblock_t first_block; + xfs_fsblock_t first_block = NULLFSBLOCK; int nimaps = 1; if (imap->br_state == XFS_EXT_NORM) @@ -462,7 +464,7 @@ retry: goto out_bmap_cancel; /* Finish up. */ - error = xfs_defer_finish(&tp, &dfops, NULL); + error = xfs_defer_finish(&tp, &dfops); if (error) goto out_bmap_cancel; @@ -600,7 +602,8 @@ xfs_reflink_cancel_cow_blocks( -(long)del.br_blockcount); /* Roll the transaction */ - error = xfs_defer_finish(tpp, &dfops, ip); + xfs_defer_ijoin(&dfops, ip); + error = xfs_defer_finish(tpp, &dfops); if (error) { xfs_defer_cancel(&dfops); break; @@ -733,7 +736,13 @@ xfs_reflink_end_cow( /* If there is a hole at end_fsb - 1 go to the previous extent */ if (!xfs_iext_lookup_extent(ip, ifp, end_fsb - 1, &idx, &got) || got.br_startoff > end_fsb) { - ASSERT(idx > 0); + /* + * In case of racing, overlapping AIO writes no COW extents + * might be left by the time I/O completes for the loser of + * the race. In that case we are done. + */ + if (idx <= 0) + goto out_cancel; xfs_iext_get_extent(ifp, --idx, &got); } @@ -789,7 +798,8 @@ xfs_reflink_end_cow( /* Remove the mapping from the CoW fork. */ xfs_bmap_del_extent_cow(ip, &idx, &got, &del); - error = xfs_defer_finish(&tp, &dfops, ip); + xfs_defer_ijoin(&dfops, ip); + error = xfs_defer_finish(&tp, &dfops); if (error) goto out_defer; next_extent: @@ -805,6 +815,7 @@ next_extent: out_defer: xfs_defer_cancel(&dfops); +out_cancel: xfs_trans_cancel(tp); xfs_iunlock(ip, XFS_ILOCK_EXCL); out: @@ -1150,7 +1161,8 @@ xfs_reflink_remap_extent( next_extent: /* Process all the deferred stuff. */ - error = xfs_defer_finish(&tp, &dfops, ip); + xfs_defer_ijoin(&dfops, ip); + error = xfs_defer_finish(&tp, &dfops); if (error) goto out_defer; } |