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| author |   Darrick J. Wong <darrick.wong@oracle.com> | 2017-12-10 18:03:55 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2017-12-14 09:20:11 -0800 |
| commit | 9d40fba8b2056773b9744a95df9ddd6cc33a4f83 (patch) | |
| tree | 211491d1ec8fca4e39b4cf58266b2a6e005e8a61 /fs | |
| parent | xfs: relax is_reflink_inode assert in xfs_reflink_find_cow_mapping (diff) | |
| download | linux-dev-9d40fba8b2056773b9744a95df9ddd6cc33a4f83.tar.xz linux-dev-9d40fba8b2056773b9744a95df9ddd6cc33a4f83.zip | |
xfs: avoid infinite loop when cancelling CoW blocks after writeback failure
When we're cancelling a cow range, we don't always delete each extent
that we iterate, so we have to move icur backwards in the list to avoid
an infinite loop.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/xfs_reflink.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index 99c5852f9fe7..6931b0c79cac 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -611,6 +611,9 @@ xfs_reflink_cancel_cow_blocks( /* Remove the mapping from the CoW fork. */ xfs_bmap_del_extent_cow(ip, &icur, &got, &del); + } else { + /* Didn't do anything, push cursor back. */ + xfs_iext_prev(ifp, &icur); } next_extent: if (!xfs_iext_get_extent(ifp, &icur, &got)) |