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Commit 8b4822de authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'md/4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md 

Pull MD fixes from Shaohua Li:

 - Several bug fixes for raid5-cache from Song Liu, mainly handle
   journal disk error

 - Fix bad block handling in choosing raid1 disk from Tomasz Majchrzak

 - Simplify external metadata array sysfs handling from Artur
   Paszkiewicz

 - Optimize raid0 discard handling from me, now raid0 will dispatch
   large discard IO directly to underlayer disks.

* tag 'md/4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
  raid1: prefer disk without bad blocks
  md/r5cache: handle sync with data in write back cache
  md/r5cache: gracefully handle journal device errors for writeback mode
  md/raid1/10: avoid unnecessary locking
  md/raid5-cache: in r5l_do_submit_io(), submit io->split_bio first
  md/md0: optimize raid0 discard handling
  md: don't return -EAGAIN in md_allow_write for external metadata arrays
  md/raid5: make use of spin_lock_irq over local_irq_disable + spin_lock
parents 667f867c d82dd0e3

drivers/md/md.c

+8 −12
Original line number Diff line number Diff line
@@ -8022,18 +8022,15 @@ EXPORT_SYMBOL(md_write_end); 
 * may proceed without blocking.  It is important to call this before

 * attempting a GFP_KERNEL allocation while holding the mddev lock.

 * Must be called with mddev_lock held.

 *

 * In the ->external case MD_SB_CHANGE_PENDING can not be cleared until mddev->lock

 * is dropped, so return -EAGAIN after notifying userspace.

 */

int md_allow_write(struct mddev *mddev)

void md_allow_write(struct mddev *mddev)

{

	if (!mddev->pers)

		return 0;

		return;

	if (mddev->ro)

		return 0;

		return;

	if (!mddev->pers->sync_request)

		return 0;

		return;



	spin_lock(&mddev->lock);

	if (mddev->in_sync) {
@@ -8046,13 +8043,12 @@ int md_allow_write(struct mddev *mddev) 
		spin_unlock(&mddev->lock);

		md_update_sb(mddev, 0);

		sysfs_notify_dirent_safe(mddev->sysfs_state);

		/* wait for the dirty state to be recorded in the metadata */

		wait_event(mddev->sb_wait,

			   !test_bit(MD_SB_CHANGE_CLEAN, &mddev->sb_flags) &&

			   !test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags));

	} else

		spin_unlock(&mddev->lock);



	if (test_bit(MD_SB_CHANGE_PENDING, &mddev->sb_flags))

		return -EAGAIN;

	else

		return 0;

}

EXPORT_SYMBOL_GPL(md_allow_write);

drivers/md/md.h

+1 −1
Original line number Diff line number Diff line
@@ -665,7 +665,7 @@ extern int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, 
			bool metadata_op);

extern void md_do_sync(struct md_thread *thread);

extern void md_new_event(struct mddev *mddev);

extern int md_allow_write(struct mddev *mddev);

extern void md_allow_write(struct mddev *mddev);

extern void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev);

extern void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors);

extern int md_check_no_bitmap(struct mddev *mddev);

drivers/md/raid0.c

+102 −14
Original line number Diff line number Diff line
@@ -385,7 +385,7 @@ static int raid0_run(struct mddev *mddev) 
		blk_queue_max_hw_sectors(mddev->queue, mddev->chunk_sectors);

		blk_queue_max_write_same_sectors(mddev->queue, mddev->chunk_sectors);

		blk_queue_max_write_zeroes_sectors(mddev->queue, mddev->chunk_sectors);

		blk_queue_max_discard_sectors(mddev->queue, mddev->chunk_sectors);

		blk_queue_max_discard_sectors(mddev->queue, UINT_MAX);



		blk_queue_io_min(mddev->queue, mddev->chunk_sectors << 9);

		blk_queue_io_opt(mddev->queue,
@@ -459,6 +459,95 @@ static inline int is_io_in_chunk_boundary(struct mddev *mddev, 
	}

}



static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)

{

	struct r0conf *conf = mddev->private;

	struct strip_zone *zone;

	sector_t start = bio->bi_iter.bi_sector;

	sector_t end;

	unsigned int stripe_size;

	sector_t first_stripe_index, last_stripe_index;

	sector_t start_disk_offset;

	unsigned int start_disk_index;

	sector_t end_disk_offset;

	unsigned int end_disk_index;

	unsigned int disk;



	zone = find_zone(conf, &start);



	if (bio_end_sector(bio) > zone->zone_end) {

		struct bio *split = bio_split(bio,

			zone->zone_end - bio->bi_iter.bi_sector, GFP_NOIO,

			mddev->bio_set);

		bio_chain(split, bio);

		generic_make_request(bio);

		bio = split;

		end = zone->zone_end;

	} else

		end = bio_end_sector(bio);



	if (zone != conf->strip_zone)

		end = end - zone[-1].zone_end;



	/* Now start and end is the offset in zone */

	stripe_size = zone->nb_dev * mddev->chunk_sectors;



	first_stripe_index = start;

	sector_div(first_stripe_index, stripe_size);

	last_stripe_index = end;

	sector_div(last_stripe_index, stripe_size);



	start_disk_index = (int)(start - first_stripe_index * stripe_size) /

		mddev->chunk_sectors;

	start_disk_offset = ((int)(start - first_stripe_index * stripe_size) %

		mddev->chunk_sectors) +

		first_stripe_index * mddev->chunk_sectors;

	end_disk_index = (int)(end - last_stripe_index * stripe_size) /

		mddev->chunk_sectors;

	end_disk_offset = ((int)(end - last_stripe_index * stripe_size) %

		mddev->chunk_sectors) +

		last_stripe_index * mddev->chunk_sectors;



	for (disk = 0; disk < zone->nb_dev; disk++) {

		sector_t dev_start, dev_end;

		struct bio *discard_bio = NULL;

		struct md_rdev *rdev;



		if (disk < start_disk_index)

			dev_start = (first_stripe_index + 1) *

				mddev->chunk_sectors;

		else if (disk > start_disk_index)

			dev_start = first_stripe_index * mddev->chunk_sectors;

		else

			dev_start = start_disk_offset;



		if (disk < end_disk_index)

			dev_end = (last_stripe_index + 1) * mddev->chunk_sectors;

		else if (disk > end_disk_index)

			dev_end = last_stripe_index * mddev->chunk_sectors;

		else

			dev_end = end_disk_offset;



		if (dev_end <= dev_start)

			continue;



		rdev = conf->devlist[(zone - conf->strip_zone) *

			conf->strip_zone[0].nb_dev + disk];

		if (__blkdev_issue_discard(rdev->bdev,

			dev_start + zone->dev_start + rdev->data_offset,

			dev_end - dev_start, GFP_NOIO, 0, &discard_bio) ||

		    !discard_bio)

			continue;

		bio_chain(discard_bio, bio);

		if (mddev->gendisk)

			trace_block_bio_remap(bdev_get_queue(rdev->bdev),

				discard_bio, disk_devt(mddev->gendisk),

				bio->bi_iter.bi_sector);

		generic_make_request(discard_bio);

	}

	bio_endio(bio);

}



static void raid0_make_request(struct mddev *mddev, struct bio *bio)

{

	struct strip_zone *zone;
@@ -473,6 +562,11 @@ static void raid0_make_request(struct mddev *mddev, struct bio *bio) 
		return;

	}



	if (unlikely((bio_op(bio) == REQ_OP_DISCARD))) {

		raid0_handle_discard(mddev, bio);

		return;

	}



	bio_sector = bio->bi_iter.bi_sector;

	sector = bio_sector;

	chunk_sects = mddev->chunk_sectors;
@@ -498,11 +592,6 @@ static void raid0_make_request(struct mddev *mddev, struct bio *bio) 
	bio->bi_iter.bi_sector = sector + zone->dev_start +

		tmp_dev->data_offset;



	if (unlikely((bio_op(bio) == REQ_OP_DISCARD) &&

		     !blk_queue_discard(bdev_get_queue(bio->bi_bdev)))) {

		/* Just ignore it */

		bio_endio(bio);

	} else {

	if (mddev->gendisk)

		trace_block_bio_remap(bdev_get_queue(bio->bi_bdev),

				      bio, disk_devt(mddev->gendisk),
@@ -511,7 +600,6 @@ static void raid0_make_request(struct mddev *mddev, struct bio *bio) 
	mddev_check_write_zeroes(mddev, bio);

	generic_make_request(bio);

}

}



static void raid0_status(struct seq_file *seq, struct mddev *mddev)

{

drivers/md/raid1.c

+10 −11
Original line number Diff line number Diff line
@@ -666,8 +666,11 @@ static int read_balance(struct r1conf *conf, struct r1bio *r1_bio, int *max_sect 
					break;

			}

			continue;

		} else

		} else {

			if ((sectors > best_good_sectors) && (best_disk >= 0))

				best_disk = -1;

			best_good_sectors = sectors;

		}



		if (best_disk >= 0)

			/* At least two disks to choose from so failfast is OK */
@@ -1529,18 +1532,17 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio, 
			plug = container_of(cb, struct raid1_plug_cb, cb);

		else

			plug = NULL;

		spin_lock_irqsave(&conf->device_lock, flags);

		if (plug) {

			bio_list_add(&plug->pending, mbio);

			plug->pending_cnt++;

		} else {

			spin_lock_irqsave(&conf->device_lock, flags);

			bio_list_add(&conf->pending_bio_list, mbio);

			conf->pending_count++;

		}

			spin_unlock_irqrestore(&conf->device_lock, flags);

		if (!plug)

			md_wakeup_thread(mddev->thread);

		}

	}



	r1_bio_write_done(r1_bio);
@@ -3197,7 +3199,7 @@ static int raid1_reshape(struct mddev *mddev) 
	struct r1conf *conf = mddev->private;

	int cnt, raid_disks;

	unsigned long flags;

	int d, d2, err;

	int d, d2;



	/* Cannot change chunk_size, layout, or level */

	if (mddev->chunk_sectors != mddev->new_chunk_sectors ||
@@ -3209,11 +3211,8 @@ static int raid1_reshape(struct mddev *mddev) 
		return -EINVAL;

	}



	if (!mddev_is_clustered(mddev)) {

		err = md_allow_write(mddev);

		if (err)

			return err;

	}

	if (!mddev_is_clustered(mddev))

		md_allow_write(mddev);



	raid_disks = mddev->raid_disks + mddev->delta_disks;

drivers/md/raid10.c

+3 −4
Original line number Diff line number Diff line
@@ -1282,18 +1282,17 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio, 
		plug = container_of(cb, struct raid10_plug_cb, cb);

	else

		plug = NULL;

	spin_lock_irqsave(&conf->device_lock, flags);

	if (plug) {

		bio_list_add(&plug->pending, mbio);

		plug->pending_cnt++;

	} else {

		spin_lock_irqsave(&conf->device_lock, flags);

		bio_list_add(&conf->pending_bio_list, mbio);

		conf->pending_count++;

	}

		spin_unlock_irqrestore(&conf->device_lock, flags);

	if (!plug)

		md_wakeup_thread(mddev->thread);

	}

}



static void raid10_write_request(struct mddev *mddev, struct bio *bio,

				 struct r10bio *r10_bio)