bcache: Use bd_link_disk_holder()
Signed-off-by: Kent Overstreet <koverstreet@google.com>
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 @@
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 @@
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 @@
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 @@
}
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 @@
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 @@
}
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 @@
}
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 @@
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 @@
{
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);
}