From ee66850642efda91d04179cae2414310675a1f73 Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Fri, 1 Feb 2013 07:29:41 -0800 Subject: bcache: Use bd_link_disk_holder() Signed-off-by: Kent Overstreet diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index b360147..c8046bc 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -661,6 +661,35 @@ void bcache_device_stop(struct bcache_device *d) closure_queue(&d->cl); } +static void bcache_device_unlink(struct bcache_device *d) +{ + unsigned i; + struct cache *ca; + + sysfs_remove_link(&d->c->kobj, d->name); + sysfs_remove_link(&d->kobj, "cache"); + + for_each_cache(ca, d->c, i) + bd_unlink_disk_holder(ca->bdev, d->disk); +} + +static void bcache_device_link(struct bcache_device *d, struct cache_set *c, + const char *name) +{ + unsigned i; + struct cache *ca; + + for_each_cache(ca, d->c, i) + bd_link_disk_holder(ca->bdev, d->disk); + + snprintf(d->name, BCACHEDEVNAME_SIZE, + "%s%u", name, d->id); + + 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"); +} + static void bcache_device_detach(struct bcache_device *d) { lockdep_assert_held(&bch_register_lock); @@ -676,6 +705,8 @@ static void bcache_device_detach(struct bcache_device *d) atomic_set(&d->detaching, 0); } + bcache_device_unlink(d); + d->c->devices[d->id] = NULL; closure_put(&d->c->caching); d->c = NULL; @@ -693,17 +724,6 @@ static void bcache_device_attach(struct bcache_device *d, struct cache_set *c, closure_get(&c->caching); } -static void bcache_device_link(struct bcache_device *d, struct cache_set *c, - const char *name) -{ - snprintf(d->name, BCACHEDEVNAME_SIZE, - "%s%u", name, d->id); - - 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"); -} - static void bcache_device_free(struct bcache_device *d) { lockdep_assert_held(&bch_register_lock); @@ -804,6 +824,7 @@ void bch_cached_dev_run(struct cached_dev *dc) } add_disk(d->disk); + bd_link_disk_holder(dc->bdev, dc->disk.disk); #if 0 char *env[] = { "SYMLINK=label" , NULL }; kobject_uevent_env(&disk_to_dev(d->disk)->kobj, KOBJ_CHANGE, env); @@ -823,9 +844,6 @@ static void cached_dev_detach_finish(struct work_struct *w) BUG_ON(!atomic_read(&dc->disk.detaching)); BUG_ON(atomic_read(&dc->count)); - sysfs_remove_link(&dc->disk.c->kobj, dc->disk.name); - sysfs_remove_link(&dc->disk.kobj, "cache"); - mutex_lock(&bch_register_lock); memset(&dc->sb.set_uuid, 0, 16); @@ -940,7 +958,6 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c) } bcache_device_attach(&dc->disk, c, u - c->uuids); - bcache_device_link(&dc->disk, c, "bdev"); list_move(&dc->list, &c->cached_devs); calc_cached_dev_sectors(c); @@ -958,6 +975,7 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c) } bch_cached_dev_run(dc); + bcache_device_link(&dc->disk, c, "bdev"); pr_info("Caching %s as %s on set %pU", bdevname(dc->bdev, buf), dc->disk.disk->disk_name, @@ -981,6 +999,7 @@ static void cached_dev_free(struct closure *cl) mutex_lock(&bch_register_lock); + bd_unlink_disk_holder(dc->bdev, dc->disk.disk); bcache_device_free(&dc->disk); list_del(&dc->list); @@ -1123,8 +1142,7 @@ static void flash_dev_flush(struct closure *cl) { struct bcache_device *d = container_of(cl, struct bcache_device, cl); - sysfs_remove_link(&d->c->kobj, d->name); - sysfs_remove_link(&d->kobj, "cache"); + bcache_device_unlink(d); kobject_del(&d->kobj); continue_at(cl, flash_dev_free, system_wq); } -- cgit v0.10.2