diff options
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 611b5f79761..8034fbd6190 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -333,9 +333,10 @@ static void raid1_end_read_request(struct bio *bio, int error) spin_unlock_irqrestore(&conf->device_lock, flags); } - if (uptodate) + if (uptodate) { raid_end_bio_io(r1_bio); - else { + rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev); + } else { /* * oops, read error: */ @@ -349,9 +350,8 @@ static void raid1_end_read_request(struct bio *bio, int error) (unsigned long long)r1_bio->sector); set_bit(R1BIO_ReadError, &r1_bio->state); reschedule_retry(r1_bio); + /* don't drop the reference on read_disk yet */ } - - rdev_dec_pending(conf->mirrors[mirror].rdev, conf->mddev); } static void close_write(struct r1bio *r1_bio) @@ -781,7 +781,12 @@ static void flush_pending_writes(struct r1conf *conf) while (bio) { /* submit pending writes */ struct bio *next = bio->bi_next; bio->bi_next = NULL; - generic_make_request(bio); + if (unlikely((bio->bi_rw & REQ_DISCARD) && + !blk_queue_discard(bdev_get_queue(bio->bi_bdev)))) + /* Just ignore it */ + bio_endio(bio, 0); + else + generic_make_request(bio); bio = next; } } else @@ -994,6 +999,8 @@ static void make_request(struct mddev *mddev, struct bio * bio) const int rw = bio_data_dir(bio); const unsigned long do_sync = (bio->bi_rw & REQ_SYNC); const unsigned long do_flush_fua = (bio->bi_rw & (REQ_FLUSH | REQ_FUA)); + const unsigned long do_discard = (bio->bi_rw + & (REQ_DISCARD | REQ_SECURE)); struct md_rdev *blocked_rdev; struct blk_plug_cb *cb; struct raid1_plug_cb *plug = NULL; @@ -1295,7 +1302,7 @@ read_again: conf->mirrors[i].rdev->data_offset); mbio->bi_bdev = conf->mirrors[i].rdev->bdev; mbio->bi_end_io = raid1_end_write_request; - mbio->bi_rw = WRITE | do_flush_fua | do_sync; + mbio->bi_rw = WRITE | do_flush_fua | do_sync | do_discard; mbio->bi_private = r1_bio; atomic_inc(&r1_bio->remaining); @@ -1549,6 +1556,8 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev) clear_bit(Unmerged, &rdev->flags); } md_integrity_add_rdev(rdev, mddev); + if (blk_queue_discard(bdev_get_queue(rdev->bdev))) + queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue); print_conf(conf); return err; } @@ -1867,7 +1876,7 @@ static int process_checks(struct r1bio *r1_bio) } else j = 0; if (j >= 0) - mddev->resync_mismatches += r1_bio->sectors; + atomic64_add(r1_bio->sectors, &mddev->resync_mismatches); if (j < 0 || (test_bit(MD_RECOVERY_CHECK, &mddev->recovery) && test_bit(BIO_UPTODATE, &sbio->bi_flags))) { /* No need to write to this device. */ @@ -2220,6 +2229,7 @@ static void handle_read_error(struct r1conf *conf, struct r1bio *r1_bio) unfreeze_array(conf); } else md_error(mddev, conf->mirrors[r1_bio->read_disk].rdev); + rdev_dec_pending(conf->mirrors[r1_bio->read_disk].rdev, conf->mddev); bio = r1_bio->bios[r1_bio->read_disk]; bdevname(bio->bi_bdev, b); @@ -2285,8 +2295,9 @@ read_more: } } -static void raid1d(struct mddev *mddev) +static void raid1d(struct md_thread *thread) { + struct mddev *mddev = thread->mddev; struct r1bio *r1_bio; unsigned long flags; struct r1conf *conf = mddev->private; @@ -2783,6 +2794,7 @@ static int run(struct mddev *mddev) int i; struct md_rdev *rdev; int ret; + bool discard_supported = false; if (mddev->level != 1) { printk(KERN_ERR "md/raid1:%s: raid level not set to mirroring (%d)\n", @@ -2812,6 +2824,8 @@ static int run(struct mddev *mddev) continue; disk_stack_limits(mddev->gendisk, rdev->bdev, rdev->data_offset << 9); + if (blk_queue_discard(bdev_get_queue(rdev->bdev))) + discard_supported = true; } mddev->degraded = 0; @@ -2846,6 +2860,13 @@ static int run(struct mddev *mddev) mddev->queue->backing_dev_info.congested_fn = raid1_congested; mddev->queue->backing_dev_info.congested_data = mddev; blk_queue_merge_bvec(mddev->queue, raid1_mergeable_bvec); + + if (discard_supported) + queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, + mddev->queue); + else + queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, + mddev->queue); } ret = md_integrity_register(mddev); |