diff options
| author | Mike Accetta <maccetta@laurelnetworks.com> | 2007-06-16 10:16:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-16 13:16:15 -0700 |
| commit | ed45666271f4fafa95b9d8ad44050e9a9bd2376e (patch) | |
| tree | 6f626a05e7d78029252768c2ac5f9b1d5309319b /drivers/md/raid1.c | |
| parent | af03b8e4e81c3789e597632268940edd11ffe870 (diff) | |
md: fix bug in error handling during raid1 repair
If raid1/repair (which reads all block and fixes any differences it finds)
hits a read error, it doesn't reset the bio for writing before writing
correct data back, so the read error isn't fixed, and the device probably
gets a zero-length write which it might complain about.
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 3a95cc5e029..46677d7d998 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1240,17 +1240,24 @@ static void sync_request_write(mddev_t *mddev, r1bio_t *r1_bio) } r1_bio->read_disk = primary; for (i=0; i<mddev->raid_disks; i++) - if (r1_bio->bios[i]->bi_end_io == end_sync_read && - test_bit(BIO_UPTODATE, &r1_bio->bios[i]->bi_flags)) { + if (r1_bio->bios[i]->bi_end_io == end_sync_read) { int j; int vcnt = r1_bio->sectors >> (PAGE_SHIFT- 9); struct bio *pbio = r1_bio->bios[primary]; struct bio *sbio = r1_bio->bios[i]; - for (j = vcnt; j-- ; ) - if (memcmp(page_address(pbio->bi_io_vec[j].bv_page), - page_address(sbio->bi_io_vec[j].bv_page), - PAGE_SIZE)) - break; + + if (test_bit(BIO_UPTODATE, &sbio->bi_flags)) { + for (j = vcnt; j-- ; ) { + struct page *p, *s; + p = pbio->bi_io_vec[j].bv_page; + s = sbio->bi_io_vec[j].bv_page; + if (memcmp(page_address(p), + page_address(s), + PAGE_SIZE)) + break; + } + } else + j = 0; if (j >= 0) mddev->resync_mismatches += r1_bio->sectors; if (j < 0 || test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) { |