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[PATCH] md: Fix bug in error handling during raid1 repair.

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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>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Mike Accetta
2007-06-12 11:09:35 +10:00
committed by Willy Tarreau
parent e8fa943e05
commit c6de5adc0a
1 changed files with 14 additions and 7 deletions
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drivers/md/raid1.c
+14 -7
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@@ -1235,17 +1235,24 @@ 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)) {