Rename from bcache-tools to bcachefs-tools

1 files changed, 0 insertions, 819 deletions

diff --git a/libbcache/blockdev.c b/libbcache/blockdev.c
deleted file mode 100644
index a4522ad2..00000000
--- a/libbcache/blockdev.c
+++ /dev/null
@@ -1,819 +0,0 @@
-
-#include "bcache.h"
-#include "blockdev.h"
-#include "btree_iter.h"
-#include "btree_update.h"
-#include "checksum.h"
-#include "error.h"
-#include "inode.h"
-#include "request.h"
-#include "super-io.h"
-#include "writeback.h"
-
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/random.h>
-
-static int bch_blockdev_major;
-static DEFINE_IDA(bch_blockdev_minor);
-static LIST_HEAD(uncached_devices);
-static DEFINE_MUTEX(bch_blockdev_lock);
-
-static struct kmem_cache *bch_search_cache;
-
-static void write_bdev_super_endio(struct bio *bio)
-{
-	struct cached_dev *dc = bio->bi_private;
-	/* XXX: error checking */
-
-	closure_put(&dc->sb_write);
-}
-
-static void bch_write_bdev_super_unlock(struct closure *cl)
-{
-	struct cached_dev *dc = container_of(cl, struct cached_dev, sb_write);
-
-	up(&dc->sb_write_mutex);
-}
-
-void bch_write_bdev_super(struct cached_dev *dc, struct closure *parent)
-{
-	struct backingdev_sb *sb = dc->disk_sb.sb;
-	struct closure *cl = &dc->sb_write;
-	struct bio *bio = dc->disk_sb.bio;
-
-	down(&dc->sb_write_mutex);
-	closure_init(cl, parent);
-
-	sb->csum = csum_vstruct(NULL, BCH_CSUM_CRC64,
-				(struct nonce) { 0 }, sb).lo;
-
-	bio_reset(bio);
-	bio->bi_bdev		= dc->disk_sb.bdev;
-	bio->bi_iter.bi_sector	= le64_to_cpu(sb->offset);
-	bio->bi_iter.bi_size	=
-		roundup(vstruct_bytes(sb),
-			bdev_logical_block_size(dc->disk_sb.bdev));
-	bio->bi_end_io		= write_bdev_super_endio;
-	bio->bi_private		= dc;
-	bio_set_op_attrs(bio, REQ_OP_WRITE, WRITE_FUA|REQ_META);
-	bch_bio_map(bio, sb);
-
-	closure_get(cl);
-
-	closure_return_with_destructor(cl, bch_write_bdev_super_unlock);
-}
-
-static int open_dev(struct block_device *b, fmode_t mode)
-{
-	struct bcache_device *d = b->bd_disk->private_data;
-
-	if (test_bit(BCACHE_DEV_CLOSING, &d->flags))
-		return -ENXIO;
-
-	closure_get(&d->cl);
-	return 0;
-}
-
-static void release_dev(struct gendisk *b, fmode_t mode)
-{
-	struct bcache_device *d = b->private_data;
-
-	closure_put(&d->cl);
-}
-
-static int ioctl_dev(struct block_device *b, fmode_t mode,
-		     unsigned int cmd, unsigned long arg)
-{
-	struct bcache_device *d = b->bd_disk->private_data;
-
-	return d->ioctl(d, mode, cmd, arg);
-}
-
-static const struct block_device_operations bcache_ops = {
-	.open		= open_dev,
-	.release	= release_dev,
-	.ioctl		= ioctl_dev,
-	.owner		= THIS_MODULE,
-};
-
-void bch_blockdev_stop(struct bcache_device *d)
-{
-	if (!test_and_set_bit(BCACHE_DEV_CLOSING, &d->flags))
-		closure_queue(&d->cl);
-}
-
-static void bcache_device_unlink(struct bcache_device *d)
-{
-	if (d->c && !test_and_set_bit(BCACHE_DEV_UNLINK_DONE, &d->flags)) {
-		sysfs_remove_link(&d->c->kobj, d->name);
-		sysfs_remove_link(&d->kobj, "cache");
-	}
-}
-
-static void bcache_device_link(struct bcache_device *d, struct bch_fs *c,
-			       const char *name)
-{
-	snprintf(d->name, BCACHEDEVNAME_SIZE,
-		 "%s%llu", name, bcache_dev_inum(d));
-
-	WARN(sysfs_create_link(&d->kobj, &c->kobj, "cache") ||
-	     sysfs_create_link(&c->kobj, &d->kobj, d->name),
-	     "Couldn't create device <-> cache set symlinks");
-
-	clear_bit(BCACHE_DEV_UNLINK_DONE, &d->flags);
-}
-
-static void bcache_device_detach(struct bcache_device *d)
-{
-	if (test_bit(BCACHE_DEV_DETACHING, &d->flags)) {
-		mutex_lock(&d->inode_lock);
-		bch_inode_rm(d->c, bcache_dev_inum(d));
-		mutex_unlock(&d->inode_lock);
-	}
-
-	bcache_device_unlink(d);
-
-	radix_tree_delete(&d->c->devices, bcache_dev_inum(d));
-
-	closure_put(&d->c->caching);
-	d->c = NULL;
-}
-
-static int bcache_device_attach(struct bcache_device *d, struct bch_fs *c)
-{
-	int ret;
-
-	ret = radix_tree_insert(&c->devices, bcache_dev_inum(d), d);
-	if (ret) {
-		pr_err("radix_tree_insert() error for inum %llu",
-		       bcache_dev_inum(d));
-		return ret;
-	}
-
-	d->c = c;
-	closure_get(&c->caching);
-
-	return ret;
-}
-
-static void bcache_device_free(struct bcache_device *d)
-{
-	pr_info("%s stopped", d->disk->disk_name);
-
-	if (d->c)
-		bcache_device_detach(d);
-	if (d->disk && d->disk->flags & GENHD_FL_UP)
-		del_gendisk(d->disk);
-	if (d->disk && d->disk->queue)
-		blk_cleanup_queue(d->disk->queue);
-	if (d->disk) {
-		ida_simple_remove(&bch_blockdev_minor, d->disk->first_minor);
-		put_disk(d->disk);
-	}
-
-	bioset_exit(&d->bio_split);
-
-	closure_debug_destroy(&d->cl);
-}
-
-static int bcache_device_init(struct bcache_device *d, unsigned block_size,
-			      sector_t sectors)
-{
-	struct request_queue *q;
-	int minor;
-
-	mutex_init(&d->inode_lock);
-
-	minor = ida_simple_get(&bch_blockdev_minor, 0, MINORMASK + 1, GFP_KERNEL);
-	if (minor < 0) {
-		pr_err("cannot allocate minor");
-		return minor;
-	}
-
-	if (!(d->disk = alloc_disk(1)) ||
-	    bioset_init(&d->bio_split, 4, offsetof(struct bch_read_bio, bio))) {
-		pr_err("cannot allocate disk");
-		ida_simple_remove(&bch_blockdev_minor, minor);
-		return -ENOMEM;
-	}
-
-	set_capacity(d->disk, sectors);
-	snprintf(d->disk->disk_name, DISK_NAME_LEN, "bcache%i", minor);
-
-	d->disk->major		= bch_blockdev_major;
-	d->disk->first_minor	= minor;
-	d->disk->fops		= &bcache_ops;
-	d->disk->private_data	= d;
-
-	q = blk_alloc_queue(GFP_KERNEL);
-	if (!q) {
-		pr_err("cannot allocate queue");
-		return -ENOMEM;
-	}
-
-	blk_queue_make_request(q, NULL);
-	d->disk->queue			= q;
-	q->queuedata			= d;
-	q->backing_dev_info.congested_data = d;
-	q->limits.max_hw_sectors	= UINT_MAX;
-	q->limits.max_sectors		= UINT_MAX;
-	q->limits.max_segment_size	= UINT_MAX;
-	q->limits.max_segments		= BIO_MAX_PAGES;
-	blk_queue_max_discard_sectors(q, UINT_MAX);
-	q->limits.discard_granularity	= 512;
-	q->limits.io_min		= block_size;
-	q->limits.logical_block_size	= block_size;
-	q->limits.physical_block_size	= block_size;
-	set_bit(QUEUE_FLAG_NONROT,	&d->disk->queue->queue_flags);
-	clear_bit(QUEUE_FLAG_ADD_RANDOM, &d->disk->queue->queue_flags);
-	set_bit(QUEUE_FLAG_DISCARD,	&d->disk->queue->queue_flags);
-
-	blk_queue_write_cache(q, true, true);
-
-	return 0;
-}
-
-/* Cached device */
-
-static void calc_cached_dev_sectors(struct bch_fs *c)
-{
-	u64 sectors = 0;
-	struct cached_dev *dc;
-
-	list_for_each_entry(dc, &c->cached_devs, list)
-		sectors += bdev_sectors(dc->disk_sb.bdev);
-
-	c->cached_dev_sectors = sectors;
-}
-
-void bch_cached_dev_run(struct cached_dev *dc)
-{
-	struct bcache_device *d = &dc->disk;
-	char buf[BCH_SB_LABEL_SIZE + 1];
-	char *env[] = {
-		"DRIVER=bcache",
-		kasprintf(GFP_KERNEL, "CACHED_UUID=%pU",
-			  dc->disk_sb.sb->disk_uuid.b),
-		NULL,
-		NULL,
-	};
-
-	memcpy(buf, dc->disk_sb.sb->label, BCH_SB_LABEL_SIZE);
-	buf[BCH_SB_LABEL_SIZE] = '\0';
-	env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf);
-
-	if (atomic_xchg(&dc->running, 1)) {
-		kfree(env[1]);
-		kfree(env[2]);
-		return;
-	}
-
-	if (!d->c &&
-	    BDEV_STATE(dc->disk_sb.sb) != BDEV_STATE_NONE) {
-		struct closure cl;
-
-		closure_init_stack(&cl);
-
-		SET_BDEV_STATE(dc->disk_sb.sb, BDEV_STATE_STALE);
-		bch_write_bdev_super(dc, &cl);
-		closure_sync(&cl);
-	}
-
-	add_disk(d->disk);
-	bd_link_disk_holder(dc->disk_sb.bdev, dc->disk.disk);
-	/* won't show up in the uevent file, use udevadm monitor -e instead
-	 * only class / kset properties are persistent */
-	kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env);
-	kfree(env[1]);
-	kfree(env[2]);
-
-	if (sysfs_create_link(&d->kobj, &disk_to_dev(d->disk)->kobj, "dev") ||
-	    sysfs_create_link(&disk_to_dev(d->disk)->kobj, &d->kobj, "bcache"))
-		pr_debug("error creating sysfs link");
-}
-
-static void cached_dev_detach_finish(struct work_struct *w)
-{
-	struct cached_dev *dc = container_of(w, struct cached_dev, detach);
-	char buf[BDEVNAME_SIZE];
-	struct closure cl;
-
-	closure_init_stack(&cl);
-
-	BUG_ON(!test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags));
-	BUG_ON(atomic_read(&dc->count));
-
-	mutex_lock(&bch_blockdev_lock);
-
-	memset(&dc->disk_sb.sb->set_uuid, 0, 16);
-	SET_BDEV_STATE(dc->disk_sb.sb, BDEV_STATE_NONE);
-
-	bch_write_bdev_super(dc, &cl);
-	closure_sync(&cl);
-
-	bcache_device_detach(&dc->disk);
-	list_move(&dc->list, &uncached_devices);
-
-	clear_bit(BCACHE_DEV_DETACHING, &dc->disk.flags);
-	clear_bit(BCACHE_DEV_UNLINK_DONE, &dc->disk.flags);
-
-	mutex_unlock(&bch_blockdev_lock);
-
-	pr_info("Caching disabled for %s", bdevname(dc->disk_sb.bdev, buf));
-
-	/* Drop ref we took in cached_dev_detach() */
-	closure_put(&dc->disk.cl);
-}
-
-void bch_cached_dev_detach(struct cached_dev *dc)
-{
-	if (test_bit(BCACHE_DEV_CLOSING, &dc->disk.flags))
-		return;
-
-	if (test_and_set_bit(BCACHE_DEV_DETACHING, &dc->disk.flags))
-		return;
-
-	/*
-	 * Block the device from being closed and freed until we're finished
-	 * detaching
-	 */
-	closure_get(&dc->disk.cl);
-
-	dc->writeback_pd.rate.rate = UINT_MAX;
-	bch_writeback_queue(dc);
-	cached_dev_put(dc);
-}
-
-int bch_cached_dev_attach(struct cached_dev *dc, struct bch_fs *c)
-{
-	__le64 rtime = cpu_to_le64(ktime_get_seconds());
-	char buf[BDEVNAME_SIZE];
-	bool found;
-	int ret;
-
-	lockdep_assert_held(&c->state_lock);
-
-	bdevname(dc->disk_sb.bdev, buf);
-
-	if (memcmp(&dc->disk_sb.sb->set_uuid,
-		   &c->sb.uuid,
-		   sizeof(c->sb.uuid)))
-		return -ENOENT;
-
-	if (dc->disk.c) {
-		pr_err("Can't attach %s: already attached", buf);
-		return -EINVAL;
-	}
-
-	if (!bch_fs_running(c)) {
-		pr_err("Can't attach %s: not running", buf);
-		return -EINVAL;
-	}
-
-	if (le16_to_cpu(dc->disk_sb.sb->block_size) < c->sb.block_size) {
-		/* Will die */
-		pr_err("Couldn't attach %s: block size less than set's block size",
-		       buf);
-		return -EINVAL;
-	}
-
-	found = !bch_cached_dev_inode_find_by_uuid(c,
-					&dc->disk_sb.sb->disk_uuid,
-					&dc->disk.inode);
-
-	if (!found && BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_DIRTY) {
-		pr_err("Couldn't find uuid for %s in set", buf);
-		return -ENOENT;
-	}
-
-	if (found &&
-	    (BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_STALE ||
-	     BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_NONE)) {
-		found = false;
-		bch_inode_rm(c, bcache_dev_inum(&dc->disk));
-	}
-
-	/* Deadlocks since we're called via sysfs...
-	sysfs_remove_file(&dc->kobj, &sysfs_attach);
-	 */
-
-	if (!found) {
-		struct closure cl;
-
-		closure_init_stack(&cl);
-
-		bkey_inode_blockdev_init(&dc->disk.inode.k_i);
-		dc->disk.inode.k.type = BCH_INODE_BLOCKDEV;
-		SET_CACHED_DEV(&dc->disk.inode.v, true);
-		dc->disk.inode.v.i_uuid = dc->disk_sb.sb->disk_uuid;
-		memcpy(dc->disk.inode.v.i_label,
-		       dc->disk_sb.sb->label, BCH_SB_LABEL_SIZE);
-		dc->disk.inode.v.i_ctime = rtime;
-		dc->disk.inode.v.i_mtime = rtime;
-
-		ret = bch_inode_create(c, &dc->disk.inode.k_i,
-				       0, BLOCKDEV_INODE_MAX,
-				       &c->unused_inode_hint);
-		if (ret) {
-			pr_err("Error %d, not caching %s", ret, buf);
-			return ret;
-		}
-
-		pr_info("attached inode %llu", bcache_dev_inum(&dc->disk));
-
-		dc->disk_sb.sb->set_uuid = c->sb.uuid;
-		SET_BDEV_STATE(dc->disk_sb.sb, BDEV_STATE_CLEAN);
-
-		bch_write_bdev_super(dc, &cl);
-		closure_sync(&cl);
-	} else {
-		dc->disk.inode.v.i_mtime = rtime;
-		bch_btree_update(c, BTREE_ID_INODES,
-				 &dc->disk.inode.k_i, NULL);
-	}
-
-	/* Count dirty sectors before attaching */
-	if (BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_DIRTY)
-		bch_sectors_dirty_init(dc, c);
-
-	ret = bcache_device_attach(&dc->disk, c);
-	if (ret)
-		return ret;
-
-	list_move(&dc->list, &c->cached_devs);
-	calc_cached_dev_sectors(c);
-
-	/*
-	 * dc->c must be set before dc->count != 0 - paired with the mb in
-	 * cached_dev_get()
-	 */
-	smp_wmb();
-	atomic_set(&dc->count, 1);
-
-	if (bch_cached_dev_writeback_start(dc))
-		return -ENOMEM;
-
-	if (BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_DIRTY) {
-		atomic_set(&dc->has_dirty, 1);
-		atomic_inc(&dc->count);
-	}
-
-	bch_cached_dev_run(dc);
-	bcache_device_link(&dc->disk, c, "bdev");
-
-	pr_info("Caching %s as %s on set %pU",
-		bdevname(dc->disk_sb.bdev, buf), dc->disk.disk->disk_name,
-		dc->disk.c->sb.uuid.b);
-	return 0;
-}
-
-void bch_attach_backing_devs(struct bch_fs *c)
-{
-	struct cached_dev *dc, *t;
-
-	lockdep_assert_held(&c->state_lock);
-
-	mutex_lock(&bch_blockdev_lock);
-
-	list_for_each_entry_safe(dc, t, &uncached_devices, list)
-		bch_cached_dev_attach(dc, c);
-
-	mutex_unlock(&bch_blockdev_lock);
-}
-
-void bch_cached_dev_release(struct kobject *kobj)
-{
-	struct cached_dev *dc = container_of(kobj, struct cached_dev,
-					     disk.kobj);
-	kfree(dc);
-	module_put(THIS_MODULE);
-}
-
-static void cached_dev_free(struct closure *cl)
-{
-	struct cached_dev *dc = container_of(cl, struct cached_dev, disk.cl);
-
-	bch_cached_dev_writeback_stop(dc);
-	bch_cached_dev_writeback_free(dc);
-
-	mutex_lock(&bch_blockdev_lock);
-
-	if (atomic_read(&dc->running))
-		bd_unlink_disk_holder(dc->disk_sb.bdev, dc->disk.disk);
-	bcache_device_free(&dc->disk);
-	list_del(&dc->list);
-
-	mutex_unlock(&bch_blockdev_lock);
-
-	bch_free_super((void *) &dc->disk_sb);
-
-	kobject_put(&dc->disk.kobj);
-}
-
-static void cached_dev_flush(struct closure *cl)
-{
-	struct cached_dev *dc = container_of(cl, struct cached_dev, disk.cl);
-	struct bcache_device *d = &dc->disk;
-
-	bch_cache_accounting_destroy(&dc->accounting);
-	bcache_device_unlink(d);
-	kobject_del(&d->kobj);
-
-	continue_at(cl, cached_dev_free, system_wq);
-}
-
-static int cached_dev_init(struct cached_dev *dc, unsigned block_size)
-{
-	int ret;
-	struct io *io;
-	struct request_queue *q = bdev_get_queue(dc->disk_sb.bdev);
-
-	dc->sequential_cutoff		= 4 << 20;
-
-	for (io = dc->io; io < dc->io + RECENT_IO; io++) {
-		list_add(&io->lru, &dc->io_lru);
-		hlist_add_head(&io->hash, dc->io_hash + RECENT_IO);
-	}
-
-	dc->disk.stripe_size = q->limits.io_opt >> 9;
-
-	if (dc->disk.stripe_size)
-		dc->partial_stripes_expensive =
-			q->limits.raid_partial_stripes_expensive;
-
-	ret = bcache_device_init(&dc->disk, block_size,
-			 dc->disk_sb.bdev->bd_part->nr_sects -
-			 le64_to_cpu(dc->disk_sb.sb->data_offset));
-	if (ret)
-		return ret;
-
-	dc->disk.disk->queue->backing_dev_info.ra_pages =
-		max(dc->disk.disk->queue->backing_dev_info.ra_pages,
-		    q->backing_dev_info.ra_pages);
-
-	bch_cached_dev_request_init(dc);
-	ret = bch_cached_dev_writeback_init(dc);
-	if (ret)
-		return ret;
-
-	return 0;
-}
-
-/* Cached device - bcache superblock */
-
-static const char *bdev_validate_super(struct backingdev_sb *sb)
-{
-	switch (le64_to_cpu(sb->version)) {
-	case BCACHE_SB_VERSION_BDEV:
-		sb->data_offset	= cpu_to_le64(BDEV_DATA_START_DEFAULT);
-		break;
-	case BCACHE_SB_VERSION_BDEV_WITH_OFFSET:
-		if (le64_to_cpu(sb->data_offset) < BDEV_DATA_START_DEFAULT)
-			return "Bad data offset";
-
-		break;
-	default:
-		return"Unsupported superblock version";
-	}
-
-	sb->last_mount	= cpu_to_le32(get_seconds());
-
-	return NULL;
-}
-
-const char *bch_backing_dev_register(struct bcache_superblock *sb)
-{
-	char name[BDEVNAME_SIZE];
-	const char *err;
-	struct bch_fs *c;
-	struct cached_dev *dc;
-
-	dc = kzalloc(sizeof(*dc), GFP_KERNEL);
-	if (!dc)
-		return "cannot allocate memory";
-
-	__module_get(THIS_MODULE);
-	INIT_LIST_HEAD(&dc->list);
-	closure_init(&dc->disk.cl, NULL);
-	set_closure_fn(&dc->disk.cl, cached_dev_flush, system_wq);
-	kobject_init(&dc->disk.kobj, &bch_cached_dev_ktype);
-	INIT_WORK(&dc->detach, cached_dev_detach_finish);
-	sema_init(&dc->sb_write_mutex, 1);
-	INIT_LIST_HEAD(&dc->io_lru);
-	spin_lock_init(&dc->io_lock);
-	bch_cache_accounting_init(&dc->accounting, &dc->disk.cl);
-
-	memcpy(&dc->disk_sb, sb, sizeof(*sb));
-	dc->disk_sb.bdev->bd_holder = dc;
-	memset(sb, 0, sizeof(*sb));
-
-	err = bdev_validate_super(dc->disk_sb.sb);
-	if (err)
-		goto err;
-
-	if (cached_dev_init(dc, le16_to_cpu(dc->disk_sb.sb->block_size) << 9))
-		goto err;
-
-	err = "error creating kobject";
-	if (kobject_add(&dc->disk.kobj,
-			&part_to_dev(dc->disk_sb.bdev->bd_part)->kobj,
-			"bcache"))
-		goto err;
-
-	err = "error accounting kobject";
-	if (bch_cache_accounting_add_kobjs(&dc->accounting, &dc->disk.kobj))
-		goto err;
-
-	pr_info("registered backing device %s",
-		bdevname(dc->disk_sb.bdev, name));
-
-	list_add(&dc->list, &uncached_devices);
-	c = bch_uuid_to_fs(dc->disk_sb.sb->set_uuid);
-	if (c) {
-		bch_cached_dev_attach(dc, c);
-		closure_put(&c->cl);
-	}
-
-	if (BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_NONE ||
-	    BDEV_STATE(dc->disk_sb.sb) == BDEV_STATE_STALE)
-		bch_cached_dev_run(dc);
-
-	return NULL;
-err:
-	bch_blockdev_stop(&dc->disk);
-	return err;
-}
-
-/* Flash only volumes */
-
-void bch_blockdev_volume_release(struct kobject *kobj)
-{
-	struct bcache_device *d = container_of(kobj, struct bcache_device,
-					       kobj);
-	kfree(d);
-}
-
-static void blockdev_volume_free(struct closure *cl)
-{
-	struct bcache_device *d = container_of(cl, struct bcache_device, cl);
-
-	bcache_device_free(d);
-	kobject_put(&d->kobj);
-}
-
-static void blockdev_volume_flush(struct closure *cl)
-{
-	struct bcache_device *d = container_of(cl, struct bcache_device, cl);
-
-	bcache_device_unlink(d);
-	kobject_del(&d->kobj);
-	continue_at(cl, blockdev_volume_free, system_wq);
-}
-
-static int blockdev_volume_run(struct bch_fs *c,
-			       struct bkey_s_c_inode_blockdev inode)
-{
-	struct bcache_device *d = kzalloc(sizeof(struct bcache_device),
-					  GFP_KERNEL);
-	int ret = -ENOMEM;
-
-	if (!d)
-		return ret;
-
-	bkey_reassemble(&d->inode.k_i, inode.s_c);
-
-	closure_init(&d->cl, NULL);
-	set_closure_fn(&d->cl, blockdev_volume_flush, system_wq);
-
-	kobject_init(&d->kobj, &bch_blockdev_volume_ktype);
-
-	ret = bcache_device_init(d, block_bytes(c),
-				 le64_to_cpu(inode.v->i_size) >> 9);
-	if (ret)
-		goto err;
-
-	ret = bcache_device_attach(d, c);
-	if (ret)
-		goto err;
-
-	bch_blockdev_volume_request_init(d);
-	add_disk(d->disk);
-
-	if (kobject_add(&d->kobj, &disk_to_dev(d->disk)->kobj, "bcache"))
-		goto err;
-
-	bcache_device_link(d, c, "volume");
-
-	return 0;
-err:
-	kobject_put(&d->kobj);
-	return ret;
-}
-
-int bch_blockdev_volumes_start(struct bch_fs *c)
-{
-	struct btree_iter iter;
-	struct bkey_s_c k;
-	struct bkey_s_c_inode_blockdev inode;
-	int ret = 0;
-
-	if (!bch_fs_running(c))
-		return -EINVAL;
-
-	for_each_btree_key(&iter, c, BTREE_ID_INODES, POS_MIN, k) {
-		if (k.k->p.inode >= BLOCKDEV_INODE_MAX)
-			break;
-
-		if (k.k->type != BCH_INODE_BLOCKDEV)
-			continue;
-
-		inode = bkey_s_c_to_inode_blockdev(k);
-
-		ret = blockdev_volume_run(c, inode);
-		if (ret)
-			break;
-	}
-	bch_btree_iter_unlock(&iter);
-
-	return ret;
-}
-
-int bch_blockdev_volume_create(struct bch_fs *c, u64 size)
-{
-	__le64 rtime = cpu_to_le64(ktime_get_seconds());
-	struct bkey_i_inode_blockdev inode;
-	int ret;
-
-	bkey_inode_blockdev_init(&inode.k_i);
-	get_random_bytes(&inode.v.i_uuid, sizeof(inode.v.i_uuid));
-	inode.v.i_ctime = rtime;
-	inode.v.i_mtime = rtime;
-	inode.v.i_size = cpu_to_le64(size);
-
-	ret = bch_inode_create(c, &inode.k_i, 0, BLOCKDEV_INODE_MAX,
-			       &c->unused_inode_hint);
-	if (ret) {
-		pr_err("Can't create volume: %d", ret);
-		return ret;
-	}
-
-	return blockdev_volume_run(c, inode_blockdev_i_to_s_c(&inode));
-}
-
-void bch_blockdevs_stop(struct bch_fs *c)
-{
-	struct cached_dev *dc;
-	struct bcache_device *d;
-	struct radix_tree_iter iter;
-	void **slot;
-
-	mutex_lock(&bch_blockdev_lock);
-	rcu_read_lock();
-
-	radix_tree_for_each_slot(slot, &c->devices, &iter, 0) {
-		d = radix_tree_deref_slot(slot);
-
-		if (CACHED_DEV(&d->inode.v) &&
-		    test_bit(BCH_FS_DETACHING, &c->flags)) {
-			dc = container_of(d, struct cached_dev, disk);
-			bch_cached_dev_detach(dc);
-		} else {
-			bch_blockdev_stop(d);
-		}
-	}
-
-	rcu_read_unlock();
-	mutex_unlock(&bch_blockdev_lock);
-}
-
-void bch_fs_blockdev_exit(struct bch_fs *c)
-{
-	mempool_exit(&c->search);
-}
-
-int bch_fs_blockdev_init(struct bch_fs *c)
-{
-	return mempool_init_slab_pool(&c->search, 1, bch_search_cache);
-}
-
-void bch_blockdev_exit(void)
-{
-	kmem_cache_destroy(bch_search_cache);
-
-	if (bch_blockdev_major >= 0)
-		unregister_blkdev(bch_blockdev_major, "bcache");
-}
-
-int __init bch_blockdev_init(void)
-{
-	bch_blockdev_major = register_blkdev(0, "bcache");
-	if (bch_blockdev_major < 0)
-		return bch_blockdev_major;
-
-	bch_search_cache = KMEM_CACHE(search, 0);
-	if (!bch_search_cache)
-		return -ENOMEM;
-
-	return 0;
-}