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bcache: Use bd_link_disk_holder() 

Signed-off-by: Kent Overstreet <koverstreet@google.com>
This commit is contained in:
Kent Overstreet 2013-02-01 07:29:41 -08:00
parent 86b26b824c
commit ee66850642
1 changed files with 35 additions and 17 deletions
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52
drivers/md/bcache/super.c
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@ -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);
}