Commit ebb7c197 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'dm-3.14-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm 

Pull device mapper fixes from Mike Snitzer:
 "A few dm-cache fixes, an invalid ioctl handling fix for dm multipath,
  a couple immutable biovec fixups for dm mirror, and a few dm-thin
  fixes.

  There will likely be additional dm-thin metadata and data resize fixes
  to include in 3.14-rc6 next week.

  Note to stable-minded folks: Immutable biovecs were introduced in
  3.14, so the related fixups for dm mirror are not needed in stable@
  kernels"

* tag 'dm-3.14-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm cache: fix truncation bug when mapping I/O to >2TB fast device
  dm thin: allow metadata space larger than supported to go unused
  dm mpath: fix stalls when handling invalid ioctls
  dm thin: fix the error path for the thin device constructor
  dm raid1: fix immutable biovec related BUG when retrying read bio
  dm io: fix I/O to multiple destinations
  dm thin: avoid metadata commit if a pool's thin devices haven't changed
  dm cache: do not add migration to completed list before unhooking bio
  dm cache: move hook_info into common portion of per_bio_data structure
parents 7aa48355 e0d849fa

drivers/md/dm-cache-target.c

+8 −5
Original line number Diff line number Diff line
@@ -289,6 +289,7 @@ struct per_bio_data { 
	bool tick:1;

	unsigned req_nr:2;

	struct dm_deferred_entry *all_io_entry;

	struct dm_hook_info hook_info;



	/*

	 * writethrough fields.  These MUST remain at the end of this
@@ -297,7 +298,6 @@ struct per_bio_data { 
	 */

	struct cache *cache;

	dm_cblock_t cblock;

	struct dm_hook_info hook_info;

	struct dm_bio_details bio_details;

};
@@ -671,15 +671,16 @@ static void remap_to_cache(struct cache *cache, struct bio *bio, 
			   dm_cblock_t cblock)

{

	sector_t bi_sector = bio->bi_iter.bi_sector;

	sector_t block = from_cblock(cblock);



	bio->bi_bdev = cache->cache_dev->bdev;

	if (!block_size_is_power_of_two(cache))

		bio->bi_iter.bi_sector =

			(from_cblock(cblock) * cache->sectors_per_block) +

			(block * cache->sectors_per_block) +

			sector_div(bi_sector, cache->sectors_per_block);

	else

		bio->bi_iter.bi_sector =

			(from_cblock(cblock) << cache->sectors_per_block_shift) |

			(block << cache->sectors_per_block_shift) |

			(bi_sector & (cache->sectors_per_block - 1));

}
@@ -1010,13 +1011,15 @@ static void overwrite_endio(struct bio *bio, int err) 
	struct per_bio_data *pb = get_per_bio_data(bio, pb_data_size);

	unsigned long flags;



	dm_unhook_bio(&pb->hook_info, bio);



	if (err)

		mg->err = true;



	mg->requeue_holder = false;



	spin_lock_irqsave(&cache->lock, flags);

	list_add_tail(&mg->list, &cache->completed_migrations);

	dm_unhook_bio(&pb->hook_info, bio);

	mg->requeue_holder = false;

	spin_unlock_irqrestore(&cache->lock, flags);



	wake_worker(cache);

drivers/md/dm-io.c

+11 −12
Original line number Diff line number Diff line
@@ -201,29 +201,28 @@ static void list_dp_init(struct dpages *dp, struct page_list *pl, unsigned offse 
/*

 * Functions for getting the pages from a bvec.

 */

static void bio_get_page(struct dpages *dp,

		  struct page **p, unsigned long *len, unsigned *offset)

static void bio_get_page(struct dpages *dp, struct page **p,

			 unsigned long *len, unsigned *offset)

{

	struct bio *bio = dp->context_ptr;

	struct bio_vec bvec = bio_iovec(bio);

	*p = bvec.bv_page;

	*len = bvec.bv_len;

	*offset = bvec.bv_offset;

	struct bio_vec *bvec = dp->context_ptr;

	*p = bvec->bv_page;

	*len = bvec->bv_len - dp->context_u;

	*offset = bvec->bv_offset + dp->context_u;

}



static void bio_next_page(struct dpages *dp)

{

	struct bio *bio = dp->context_ptr;

	struct bio_vec bvec = bio_iovec(bio);



	bio_advance(bio, bvec.bv_len);

	struct bio_vec *bvec = dp->context_ptr;

	dp->context_ptr = bvec + 1;

	dp->context_u = 0;

}



static void bio_dp_init(struct dpages *dp, struct bio *bio)

{

	dp->get_page = bio_get_page;

	dp->next_page = bio_next_page;

	dp->context_ptr = bio;

	dp->context_ptr = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);

	dp->context_u = bio->bi_iter.bi_bvec_done;

}



/*

drivers/md/dm-mpath.c

+5 −2
Original line number Diff line number Diff line
@@ -1626,8 +1626,11 @@ static int multipath_ioctl(struct dm_target *ti, unsigned int cmd, 
	/*

	 * Only pass ioctls through if the device sizes match exactly.

	 */

	if (!r && ti->len != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT)

		r = scsi_verify_blk_ioctl(NULL, cmd);

	if (!bdev || ti->len != i_size_read(bdev->bd_inode) >> SECTOR_SHIFT) {

		int err = scsi_verify_blk_ioctl(NULL, cmd);

		if (err)

			r = err;

	}



	if (r == -ENOTCONN && !fatal_signal_pending(current))

		queue_work(kmultipathd, &m->process_queued_ios);

drivers/md/dm-raid1.c

+3 −0
Original line number Diff line number Diff line
@@ -1244,6 +1244,9 @@ static int mirror_end_io(struct dm_target *ti, struct bio *bio, int error) 


			dm_bio_restore(bd, bio);

			bio_record->details.bi_bdev = NULL;



			atomic_inc(&bio->bi_remaining);



			queue_bio(ms, bio, rw);

			return DM_ENDIO_INCOMPLETE;

		}

drivers/md/dm-thin-metadata.c

+19 −2
Original line number Diff line number Diff line
@@ -483,7 +483,7 @@ static int __write_initial_superblock(struct dm_pool_metadata *pmd) 


	disk_super->data_mapping_root = cpu_to_le64(pmd->root);

	disk_super->device_details_root = cpu_to_le64(pmd->details_root);

	disk_super->metadata_block_size = cpu_to_le32(THIN_METADATA_BLOCK_SIZE >> SECTOR_SHIFT);

	disk_super->metadata_block_size = cpu_to_le32(THIN_METADATA_BLOCK_SIZE);

	disk_super->metadata_nr_blocks = cpu_to_le64(bdev_size >> SECTOR_TO_BLOCK_SHIFT);

	disk_super->data_block_size = cpu_to_le32(pmd->data_block_size);
@@ -651,7 +651,7 @@ static int __create_persistent_data_objects(struct dm_pool_metadata *pmd, bool f 
{

	int r;



	pmd->bm = dm_block_manager_create(pmd->bdev, THIN_METADATA_BLOCK_SIZE,

	pmd->bm = dm_block_manager_create(pmd->bdev, THIN_METADATA_BLOCK_SIZE << SECTOR_SHIFT,

					  THIN_METADATA_CACHE_SIZE,

					  THIN_MAX_CONCURRENT_LOCKS);

	if (IS_ERR(pmd->bm)) {
@@ -1489,6 +1489,23 @@ bool dm_thin_changed_this_transaction(struct dm_thin_device *td) 
	return r;

}



bool dm_pool_changed_this_transaction(struct dm_pool_metadata *pmd)

{

	bool r = false;

	struct dm_thin_device *td, *tmp;



	down_read(&pmd->root_lock);

	list_for_each_entry_safe(td, tmp, &pmd->thin_devices, list) {

		if (td->changed) {

			r = td->changed;

			break;

		}

	}

	up_read(&pmd->root_lock);



	return r;

}



bool dm_thin_aborted_changes(struct dm_thin_device *td)

{

	bool r;

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