diff options
Diffstat (limited to 'drivers/md/dm-snap.c')
| -rw-r--r-- | drivers/md/dm-snap.c | 62 |
1 files changed, 4 insertions, 58 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 53cf79d..fdde53c 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -19,7 +19,6 @@ #include <linux/vmalloc.h> #include <linux/log2.h> #include <linux/dm-kcopyd.h> -#include <linux/workqueue.h> #include "dm-exception-store.h" @@ -80,9 +79,6 @@ struct dm_snapshot { /* Origin writes don't trigger exceptions until this is set */ int active; - /* Whether or not owning mapped_device is suspended */ - int suspended; - atomic_t pending_exceptions_count; mempool_t *pending_pool; @@ -106,10 +102,6 @@ struct dm_snapshot { struct dm_kcopyd_client *kcopyd_client; - /* Queue of snapshot writes for ksnapd to flush */ - struct bio_list queued_bios; - struct work_struct queued_bios_work; - /* Wait for events based on state_bits */ unsigned long state_bits; @@ -160,9 +152,6 @@ struct dm_dev *dm_snap_cow(struct dm_snapshot *s) } EXPORT_SYMBOL(dm_snap_cow); -static struct workqueue_struct *ksnapd; -static void flush_queued_bios(struct work_struct *work); - static sector_t chunk_to_sector(struct dm_exception_store *store, chunk_t chunk) { @@ -1110,7 +1099,6 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) s->ti = ti; s->valid = 1; s->active = 0; - s->suspended = 0; atomic_set(&s->pending_exceptions_count, 0); init_rwsem(&s->lock); INIT_LIST_HEAD(&s->list); @@ -1153,9 +1141,6 @@ static int snapshot_ctr(struct dm_target *ti, unsigned int argc, char **argv) spin_lock_init(&s->tracked_chunk_lock); - bio_list_init(&s->queued_bios); - INIT_WORK(&s->queued_bios_work, flush_queued_bios); - ti->private = s; ti->num_flush_requests = num_flush_requests; @@ -1279,8 +1264,6 @@ static void snapshot_dtr(struct dm_target *ti) struct dm_snapshot *s = ti->private; struct dm_snapshot *snap_src = NULL, *snap_dest = NULL; - flush_workqueue(ksnapd); - down_read(&_origins_lock); /* Check whether exception handover must be cancelled */ (void) __find_snapshots_sharing_cow(s, &snap_src, &snap_dest, NULL); @@ -1342,20 +1325,6 @@ static void flush_bios(struct bio *bio) } } -static void flush_queued_bios(struct work_struct *work) -{ - struct dm_snapshot *s = - container_of(work, struct dm_snapshot, queued_bios_work); - struct bio *queued_bios; - unsigned long flags; - - spin_lock_irqsave(&s->pe_lock, flags); - queued_bios = bio_list_get(&s->queued_bios); - spin_unlock_irqrestore(&s->pe_lock, flags); - - flush_bios(queued_bios); -} - static int do_origin(struct dm_dev *origin, struct bio *bio); /* @@ -1760,15 +1729,6 @@ static void snapshot_merge_presuspend(struct dm_target *ti) stop_merge(s); } -static void snapshot_postsuspend(struct dm_target *ti) -{ - struct dm_snapshot *s = ti->private; - - down_write(&s->lock); - s->suspended = 1; - up_write(&s->lock); -} - static int snapshot_preresume(struct dm_target *ti) { int r = 0; @@ -1783,7 +1743,7 @@ static int snapshot_preresume(struct dm_target *ti) DMERR("Unable to resume snapshot source until " "handover completes."); r = -EINVAL; - } else if (!snap_src->suspended) { + } else if (!dm_suspended(snap_src->ti)) { DMERR("Unable to perform snapshot handover until " "source is suspended."); r = -EINVAL; @@ -1816,7 +1776,6 @@ static void snapshot_resume(struct dm_target *ti) down_write(&s->lock); s->active = 1; - s->suspended = 0; up_write(&s->lock); } @@ -2194,7 +2153,7 @@ static int origin_iterate_devices(struct dm_target *ti, static struct target_type origin_target = { .name = "snapshot-origin", - .version = {1, 7, 0}, + .version = {1, 7, 1}, .module = THIS_MODULE, .ctr = origin_ctr, .dtr = origin_dtr, @@ -2207,13 +2166,12 @@ static struct target_type origin_target = { static struct target_type snapshot_target = { .name = "snapshot", - .version = {1, 9, 0}, + .version = {1, 10, 0}, .module = THIS_MODULE, .ctr = snapshot_ctr, .dtr = snapshot_dtr, .map = snapshot_map, .end_io = snapshot_end_io, - .postsuspend = snapshot_postsuspend, .preresume = snapshot_preresume, .resume = snapshot_resume, .status = snapshot_status, @@ -2222,14 +2180,13 @@ static struct target_type snapshot_target = { static struct target_type merge_target = { .name = dm_snapshot_merge_target_name, - .version = {1, 0, 0}, + .version = {1, 1, 0}, .module = THIS_MODULE, .ctr = snapshot_ctr, .dtr = snapshot_dtr, .map = snapshot_merge_map, .end_io = snapshot_end_io, .presuspend = snapshot_merge_presuspend, - .postsuspend = snapshot_postsuspend, .preresume = snapshot_preresume, .resume = snapshot_merge_resume, .status = snapshot_status, @@ -2291,17 +2248,8 @@ static int __init dm_snapshot_init(void) goto bad_tracked_chunk_cache; } - ksnapd = create_singlethread_workqueue("ksnapd"); - if (!ksnapd) { - DMERR("Failed to create ksnapd workqueue."); - r = -ENOMEM; - goto bad_pending_pool; - } - return 0; -bad_pending_pool: - kmem_cache_destroy(tracked_chunk_cache); bad_tracked_chunk_cache: kmem_cache_destroy(pending_cache); bad_pending_cache: @@ -2322,8 +2270,6 @@ bad_register_snapshot_target: static void __exit dm_snapshot_exit(void) { - destroy_workqueue(ksnapd); - dm_unregister_target(&snapshot_target); dm_unregister_target(&origin_target); dm_unregister_target(&merge_target); |
