diff options
| author | Ilya Dryomov <idryomov@gmail.com> | 2017-04-13 13:17:38 +0300 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-05-04 10:19:23 +0300 |
| commit | cbbfb0ff115159847121afe9c7553bd5c86f6062 (patch) | |
| tree | 77a36c3a69ab97acb59f7a3b95f308612af3c198 /drivers/block | |
| parent | bbead745d96cfd51aaa332bdeab300862c7a8061 (diff) | |
| download | linux-cbbfb0ff115159847121afe9c7553bd5c86f6062.tar.xz | |
rbd: store lock cookie
In preparation for supporting set_cookie method (or rather set_cookie
fallback for older OSDs), store the lock cookie on lock and use it on
unlock instead of recalculating from rbd_dev->watch_cookie.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 423de775aabb..5f563db59820 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -387,6 +387,7 @@ struct rbd_device { struct rw_semaphore lock_rwsem; enum rbd_lock_state lock_state; + char lock_cookie[32]; struct rbd_client_id owner_cid; struct work_struct acquired_lock_work; struct work_struct released_lock_work; @@ -3079,7 +3080,8 @@ static int rbd_lock(struct rbd_device *rbd_dev) char cookie[32]; int ret; - WARN_ON(__rbd_is_lock_owner(rbd_dev)); + WARN_ON(__rbd_is_lock_owner(rbd_dev) || + rbd_dev->lock_cookie[0] != '\0'); format_lock_cookie(rbd_dev, cookie); ret = ceph_cls_lock(osdc, &rbd_dev->header_oid, &rbd_dev->header_oloc, @@ -3089,6 +3091,7 @@ static int rbd_lock(struct rbd_device *rbd_dev) return ret; rbd_dev->lock_state = RBD_LOCK_STATE_LOCKED; + strcpy(rbd_dev->lock_cookie, cookie); rbd_set_owner_cid(rbd_dev, &cid); queue_work(rbd_dev->task_wq, &rbd_dev->acquired_lock_work); return 0; @@ -3100,19 +3103,19 @@ static int rbd_lock(struct rbd_device *rbd_dev) static void rbd_unlock(struct rbd_device *rbd_dev) { struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; - char cookie[32]; int ret; - WARN_ON(!__rbd_is_lock_owner(rbd_dev)); + WARN_ON(!__rbd_is_lock_owner(rbd_dev) || + rbd_dev->lock_cookie[0] == '\0'); - format_lock_cookie(rbd_dev, cookie); ret = ceph_cls_unlock(osdc, &rbd_dev->header_oid, &rbd_dev->header_oloc, - RBD_LOCK_NAME, cookie); + RBD_LOCK_NAME, rbd_dev->lock_cookie); if (ret && ret != -ENOENT) rbd_warn(rbd_dev, "failed to unlock: %d", ret); /* treat errors as the image is unlocked */ rbd_dev->lock_state = RBD_LOCK_STATE_UNLOCKED; + rbd_dev->lock_cookie[0] = '\0'; rbd_set_owner_cid(rbd_dev, &rbd_empty_cid); queue_work(rbd_dev->task_wq, &rbd_dev->released_lock_work); } |