diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid1.c | 79 | ||||
| -rw-r--r-- | drivers/md/raid1.h | 13 |
2 files changed, 80 insertions, 12 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 3214606204d2..141de75a6c7c 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -163,7 +163,7 @@ static void put_all_bios(conf_t *conf, r1bio_t *r1_bio) for (i = 0; i < conf->raid_disks; i++) { struct bio **bio = r1_bio->bios + i; - if (*bio && *bio != IO_BLOCKED) + if (!BIO_SPECIAL(*bio)) bio_put(*bio); *bio = NULL; } @@ -337,7 +337,10 @@ static void r1_bio_write_done(r1bio_t *r1_bio) !test_bit(R1BIO_Degraded, &r1_bio->state), test_bit(R1BIO_BehindIO, &r1_bio->state)); md_write_end(r1_bio->mddev); - raid_end_bio_io(r1_bio); + if (test_bit(R1BIO_MadeGood, &r1_bio->state)) + reschedule_retry(r1_bio); + else + raid_end_bio_io(r1_bio); } } @@ -363,7 +366,7 @@ static void raid1_end_write_request(struct bio *bio, int error) md_error(r1_bio->mddev, conf->mirrors[mirror].rdev); /* an I/O failed, we can't clear the bitmap */ set_bit(R1BIO_Degraded, &r1_bio->state); - } else + } else { /* * Set R1BIO_Uptodate in our master bio, so that we * will return a good error code for to the higher @@ -374,8 +377,20 @@ static void raid1_end_write_request(struct bio *bio, int error) * to user-side. So if something waits for IO, then it * will wait for the 'master' bio. */ + sector_t first_bad; + int bad_sectors; + set_bit(R1BIO_Uptodate, &r1_bio->state); + /* Maybe we can clear some bad blocks. */ + if (is_badblock(conf->mirrors[mirror].rdev, + r1_bio->sector, r1_bio->sectors, + &first_bad, &bad_sectors)) { + r1_bio->bios[mirror] = IO_MADE_GOOD; + set_bit(R1BIO_MadeGood, &r1_bio->state); + } + } + update_head_pos(mirror, r1_bio); if (behind) { @@ -402,7 +417,9 @@ static void raid1_end_write_request(struct bio *bio, int error) } } } - rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev); + if (r1_bio->bios[mirror] == NULL) + rdev_dec_pending(conf->mirrors[mirror].rdev, + conf->mddev); /* * Let's see if all mirrored write operations have finished @@ -1340,6 +1357,8 @@ static void end_sync_write(struct bio *bio, int error) conf_t *conf = mddev->private; int i; int mirror=0; + sector_t first_bad; + int bad_sectors; for (i = 0; i < conf->raid_disks; i++) if (r1_bio->bios[i] == bio) { @@ -1358,14 +1377,22 @@ static void end_sync_write(struct bio *bio, int error) sectors_to_go -= sync_blocks; } while (sectors_to_go > 0); md_error(mddev, conf->mirrors[mirror].rdev); - } + } else if (is_badblock(conf->mirrors[mirror].rdev, + r1_bio->sector, + r1_bio->sectors, + &first_bad, &bad_sectors)) + set_bit(R1BIO_MadeGood, &r1_bio->state); update_head_pos(mirror, r1_bio); if (atomic_dec_and_test(&r1_bio->remaining)) { - sector_t s = r1_bio->sectors; - put_buf(r1_bio); - md_done_sync(mddev, s, uptodate); + int s = r1_bio->sectors; + if (test_bit(R1BIO_MadeGood, &r1_bio->state)) + reschedule_retry(r1_bio); + else { + put_buf(r1_bio); + md_done_sync(mddev, s, uptodate); + } } } @@ -1727,9 +1754,39 @@ static void raid1d(mddev_t *mddev) mddev = r1_bio->mddev; conf = mddev->private; - if (test_bit(R1BIO_IsSync, &r1_bio->state)) - sync_request_write(mddev, r1_bio); - else if (test_bit(R1BIO_ReadError, &r1_bio->state)) { + if (test_bit(R1BIO_IsSync, &r1_bio->state)) { + if (test_bit(R1BIO_MadeGood, &r1_bio->state)) { + int m; + int s = r1_bio->sectors; + for (m = 0; m < conf->raid_disks ; m++) { + struct bio *bio = r1_bio->bios[m]; + if (bio->bi_end_io != NULL && + test_bit(BIO_UPTODATE, + &bio->bi_flags)) { + rdev = conf->mirrors[m].rdev; + rdev_clear_badblocks( + rdev, + r1_bio->sector, + r1_bio->sectors); + } + } + put_buf(r1_bio); + md_done_sync(mddev, s, 1); + } else + sync_request_write(mddev, r1_bio); + } else if (test_bit(R1BIO_MadeGood, &r1_bio->state)) { + int m; + for (m = 0; m < conf->raid_disks ; m++) + if (r1_bio->bios[m] == IO_MADE_GOOD) { + rdev = conf->mirrors[m].rdev; + rdev_clear_badblocks( + rdev, + r1_bio->sector, + r1_bio->sectors); + rdev_dec_pending(rdev, mddev); + } + raid_end_bio_io(r1_bio); + } else if (test_bit(R1BIO_ReadError, &r1_bio->state)) { int disk; int max_sectors; diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h index aa6af37ca01b..f81360d49af4 100644 --- a/drivers/md/raid1.h +++ b/drivers/md/raid1.h @@ -116,7 +116,14 @@ struct r1bio_s { * correct the read error. To keep track of bad blocks on a per-bio * level, we store IO_BLOCKED in the appropriate 'bios' pointer */ -#define IO_BLOCKED ((struct bio*)1) +#define IO_BLOCKED ((struct bio *)1) +/* When we successfully write to a known bad-block, we need to remove the + * bad-block marking which must be done from process context. So we record + * the success by setting bios[n] to IO_MADE_GOOD + */ +#define IO_MADE_GOOD ((struct bio *)2) + +#define BIO_SPECIAL(bio) ((unsigned long)bio <= 2) /* bits for r1bio.state */ #define R1BIO_Uptodate 0 @@ -135,6 +142,10 @@ struct r1bio_s { * Record that bi_end_io was called with this flag... */ #define R1BIO_Returned 6 +/* If a write for this request means we can clear some + * known-bad-block records, we set this flag + */ +#define R1BIO_MadeGood 7 extern int md_raid1_congested(mddev_t *mddev, int bits); |