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| author | Song Liu <songliubraving@fb.com> | 2017-03-13 13:44:35 -0700 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-03-14 09:57:10 -0700 |
| commit | 0977762f6d15f13caccc20d71a5dec47d098907d (patch) | |
| tree | 77ee3009f8efac51dd90f44acb9c38a8dce127f4 /drivers/md/raid5.c | |
| parent | 1345921393ba23b60d3fcf15933e699232ad25ae (diff) | |
| download | linux-0977762f6d15f13caccc20d71a5dec47d098907d.tar.gz linux-0977762f6d15f13caccc20d71a5dec47d098907d.tar.xz | |
md/r5cache: fix set_syndrome_sources() for data in cache
Before this patch, device InJournal will be included in prexor
(SYNDROME_SRC_WANT_DRAIN) but not in reconstruct (SYNDROME_SRC_WRITTEN). So it
will break parity calculation. With srctype == SYNDROME_SRC_WRITTEN, we need
include both dev with non-null ->written and dev with R5_InJournal. This fixes
logic in 1e6d690(md/r5cache: caching phase of r5cache)
Cc: stable@vger.kernel.org (v4.10+)
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid5.c')
| -rw-r--r-- | drivers/md/raid5.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 6bfedfcf41c1..ed5cd705b985 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -1401,7 +1401,8 @@ static int set_syndrome_sources(struct page **srcs, (test_bit(R5_Wantdrain, &dev->flags) || test_bit(R5_InJournal, &dev->flags))) || (srctype == SYNDROME_SRC_WRITTEN && - dev->written)) { + (dev->written || + test_bit(R5_InJournal, &dev->flags)))) { if (test_bit(R5_InJournal, &dev->flags)) srcs[slot] = sh->dev[i].orig_page; else |