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path: root/drivers/md/raid10.c
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Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c95
1 files changed, 84 insertions, 11 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 0138a727c1f3..906ccbd0f7dc 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -911,7 +911,12 @@ static void flush_pending_writes(struct r10conf *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
@@ -1050,6 +1055,44 @@ static sector_t choose_data_offset(struct r10bio *r10_bio,
return rdev->new_data_offset;
}
+struct raid10_plug_cb {
+ struct blk_plug_cb cb;
+ struct bio_list pending;
+ int pending_cnt;
+};
+
+static void raid10_unplug(struct blk_plug_cb *cb, bool from_schedule)
+{
+ struct raid10_plug_cb *plug = container_of(cb, struct raid10_plug_cb,
+ cb);
+ struct mddev *mddev = plug->cb.data;
+ struct r10conf *conf = mddev->private;
+ struct bio *bio;
+
+ if (from_schedule) {
+ spin_lock_irq(&conf->device_lock);
+ bio_list_merge(&conf->pending_bio_list, &plug->pending);
+ conf->pending_count += plug->pending_cnt;
+ spin_unlock_irq(&conf->device_lock);
+ md_wakeup_thread(mddev->thread);
+ kfree(plug);
+ return;
+ }
+
+ /* we aren't scheduling, so we can do the write-out directly. */
+ bio = bio_list_get(&plug->pending);
+ bitmap_unplug(mddev->bitmap);
+ wake_up(&conf->wait_barrier);
+
+ while (bio) { /* submit pending writes */
+ struct bio *next = bio->bi_next;
+ bio->bi_next = NULL;
+ generic_make_request(bio);
+ bio = next;
+ }
+ kfree(plug);
+}
+
static void make_request(struct mddev *mddev, struct bio * bio)
{
struct r10conf *conf = mddev->private;
@@ -1061,8 +1104,12 @@ 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_fua = (bio->bi_rw & REQ_FUA);
+ const unsigned long do_discard = (bio->bi_rw
+ & (REQ_DISCARD | REQ_SECURE));
unsigned long flags;
struct md_rdev *blocked_rdev;
+ struct blk_plug_cb *cb;
+ struct raid10_plug_cb *plug = NULL;
int sectors_handled;
int max_sectors;
int sectors;
@@ -1081,7 +1128,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
|| conf->prev.near_copies < conf->prev.raid_disks))) {
struct bio_pair *bp;
/* Sanity check -- queue functions should prevent this happening */
- if (bio->bi_vcnt != 1 ||
+ if ((bio->bi_vcnt != 1 && bio->bi_vcnt != 0) ||
bio->bi_idx != 0)
goto bad_map;
/* This is a one page bio that upper layers
@@ -1410,15 +1457,26 @@ retry_write:
conf->mirrors[d].rdev));
mbio->bi_bdev = conf->mirrors[d].rdev->bdev;
mbio->bi_end_io = raid10_end_write_request;
- mbio->bi_rw = WRITE | do_sync | do_fua;
+ mbio->bi_rw = WRITE | do_sync | do_fua | do_discard;
mbio->bi_private = r10_bio;
atomic_inc(&r10_bio->remaining);
+
+ cb = blk_check_plugged(raid10_unplug, mddev, sizeof(*plug));
+ if (cb)
+ plug = container_of(cb, struct raid10_plug_cb, cb);
+ else
+ plug = NULL;
spin_lock_irqsave(&conf->device_lock, flags);
- bio_list_add(&conf->pending_bio_list, mbio);
- conf->pending_count++;
+ if (plug) {
+ bio_list_add(&plug->pending, mbio);
+ plug->pending_cnt++;
+ } else {
+ bio_list_add(&conf->pending_bio_list, mbio);
+ conf->pending_count++;
+ }
spin_unlock_irqrestore(&conf->device_lock, flags);
- if (!mddev_check_plugged(mddev))
+ if (!plug)
md_wakeup_thread(mddev->thread);
if (!r10_bio->devs[i].repl_bio)
@@ -1439,7 +1497,7 @@ retry_write:
conf->mirrors[d].replacement));
mbio->bi_bdev = conf->mirrors[d].replacement->bdev;
mbio->bi_end_io = raid10_end_write_request;
- mbio->bi_rw = WRITE | do_sync | do_fua;
+ mbio->bi_rw = WRITE | do_sync | do_fua | do_discard;
mbio->bi_private = r10_bio;
atomic_inc(&r10_bio->remaining);
@@ -1638,7 +1696,7 @@ static int raid10_spare_active(struct mddev *mddev)
&& !test_bit(Faulty, &tmp->rdev->flags)
&& !test_and_set_bit(In_sync, &tmp->rdev->flags)) {
count++;
- sysfs_notify_dirent(tmp->rdev->sysfs_state);
+ sysfs_notify_dirent_safe(tmp->rdev->sysfs_state);
}
}
spin_lock_irqsave(&conf->device_lock, flags);
@@ -1725,6 +1783,9 @@ static int raid10_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;
}
@@ -1952,7 +2013,7 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
break;
if (j == vcnt)
continue;
- mddev->resync_mismatches += r10_bio->sectors;
+ atomic64_add(r10_bio->sectors, &mddev->resync_mismatches);
if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery))
/* Don't fix anything. */
continue;
@@ -2673,8 +2734,9 @@ static void handle_write_completed(struct r10conf *conf, struct r10bio *r10_bio)
}
}
-static void raid10d(struct mddev *mddev)
+static void raid10d(struct md_thread *thread)
{
+ struct mddev *mddev = thread->mddev;
struct r10bio *r10_bio;
unsigned long flags;
struct r10conf *conf = mddev->private;
@@ -3158,7 +3220,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr,
else {
bad_sectors -= (sector - first_bad);
if (max_sync > bad_sectors)
- max_sync = max_sync;
+ max_sync = bad_sectors;
continue;
}
}
@@ -3482,6 +3544,7 @@ static int run(struct mddev *mddev)
sector_t size;
sector_t min_offset_diff = 0;
int first = 1;
+ bool discard_supported = false;
if (mddev->private == NULL) {
conf = setup_conf(mddev);
@@ -3498,6 +3561,8 @@ static int run(struct mddev *mddev)
chunk_size = mddev->chunk_sectors << 9;
if (mddev->queue) {
+ blk_queue_max_discard_sectors(mddev->queue,
+ mddev->chunk_sectors);
blk_queue_io_min(mddev->queue, chunk_size);
if (conf->geo.raid_disks % conf->geo.near_copies)
blk_queue_io_opt(mddev->queue, chunk_size * conf->geo.raid_disks);
@@ -3543,8 +3608,16 @@ static int run(struct mddev *mddev)
rdev->data_offset << 9);
disk->head_position = 0;
+
+ if (blk_queue_discard(bdev_get_queue(rdev->bdev)))
+ discard_supported = true;
}
+ if (discard_supported)
+ queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue);
+ else
+ queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, mddev->queue);
+
/* need to check that every block has at least one working mirror */
if (!enough(conf, -1)) {
printk(KERN_ERR "md/raid10:%s: not enough operational mirrors.\n",
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-15 20:22:22 +0000