diff options
| author |   majianpeng <majianpeng@gmail.com> | 2012-04-12 16:04:47 +1000 |
|---|---|---|
| committer |   NeilBrown <neilb@suse.de> | 2012-04-12 16:04:47 +1000 |
| commit | f4380a915823dbed0bf8e3cf502ebcf2b7c7f833 (patch) | |
| tree | 1326179e1f715f33495066b2fe4b99acf1bbdd96 /drivers | |
| parent | MD: Bitmap version cleanup. (diff) | |
| download | linux-dev-f4380a915823dbed0bf8e3cf502ebcf2b7c7f833.tar.xz linux-dev-f4380a915823dbed0bf8e3cf502ebcf2b7c7f833.zip | |
md/raid1,raid10: Fix calculation of 'vcnt' when processing error recovery.
If r1bio->sectors % 8 != 0,then the memcmp and a later
memcpy will omit the last bio_vec.
This is suitable for any stable kernel since 3.1 when bad-block
management was introduced.
Cc: stable@vger.kernel.org
Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/raid1.c | 3 | ||||
| -rw-r--r-- | drivers/md/raid10.c | 4 |
2 files changed, 4 insertions, 3 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index d35e4c991e38..15dd59b84e94 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1712,6 +1712,7 @@ static int process_checks(struct r1bio *r1_bio) struct r1conf *conf = mddev->private; int primary; int i; + int vcnt; for (primary = 0; primary < conf->raid_disks * 2; primary++) if (r1_bio->bios[primary]->bi_end_io == end_sync_read && @@ -1721,9 +1722,9 @@ static int process_checks(struct r1bio *r1_bio) break; } r1_bio->read_disk = primary; + vcnt = (r1_bio->sectors + PAGE_SIZE / 512 - 1) >> (PAGE_SHIFT - 9); for (i = 0; i < conf->raid_disks * 2; i++) { int j; - int vcnt = r1_bio->sectors >> (PAGE_SHIFT- 9); struct bio *pbio = r1_bio->bios[primary]; struct bio *sbio = r1_bio->bios[i]; int size; diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index fff782189e48..c8dbb84d5357 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1788,6 +1788,7 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio) struct r10conf *conf = mddev->private; int i, first; struct bio *tbio, *fbio; + int vcnt; atomic_set(&r10_bio->remaining, 1); @@ -1802,10 +1803,10 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio) first = i; fbio = r10_bio->devs[i].bio; + vcnt = (r10_bio->sectors + (PAGE_SIZE >> 9) - 1) >> (PAGE_SHIFT - 9); /* now find blocks with errors */ for (i=0 ; i < conf->copies ; i++) { int j, d; - int vcnt = r10_bio->sectors >> (PAGE_SHIFT-9); tbio = r10_bio->devs[i].bio; @@ -1871,7 +1872,6 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio) */ for (i = 0; i < conf->copies; i++) { int j, d; - int vcnt = r10_bio->sectors >> (PAGE_SHIFT-9); tbio = r10_bio->devs[i].repl_bio; if (!tbio || !tbio->bi_end_io) |