diff options
Diffstat (limited to 'drivers/block/rbd.c')
| -rw-r--r-- | drivers/block/rbd.c | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 6bbd5af1f029..013c7a549fb6 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -82,7 +82,6 @@ struct rbd_image_header { __u8 obj_order; __u8 crypt_type; __u8 comp_type; - struct rw_semaphore snap_rwsem; struct ceph_snap_context *snapc; size_t snap_names_len; u64 snap_seq; @@ -173,6 +172,8 @@ struct rbd_device { struct ceph_osd_event *watch_event; struct ceph_osd_request *watch_request; + /* protects updating the header */ + struct rw_semaphore header_rwsem; char snap_name[RBD_MAX_SNAP_NAME_LEN]; u32 cur_snap; /* index+1 of current snapshot within snap context 0 - for the head */ @@ -502,7 +503,6 @@ static int rbd_header_from_disk(struct rbd_image_header *header, if (!header->snapc) return -ENOMEM; - init_rwsem(&header->snap_rwsem); header->snap_names_len = le64_to_cpu(ondisk->snap_names_len); if (snap_count) { header->snap_names = kmalloc(header->snap_names_len, @@ -597,7 +597,7 @@ static int rbd_header_set_snap(struct rbd_device *dev, u64 *size) BUILD_BUG_ON(sizeof (dev->snap_name) < sizeof (RBD_SNAP_HEAD_NAME)); - down_write(&header->snap_rwsem); + down_write(&dev->header_rwsem); if (!memcmp(dev->snap_name, RBD_SNAP_HEAD_NAME, sizeof (RBD_SNAP_HEAD_NAME))) { @@ -620,7 +620,7 @@ static int rbd_header_set_snap(struct rbd_device *dev, u64 *size) ret = 0; done: - up_write(&header->snap_rwsem); + up_write(&dev->header_rwsem); return ret; } @@ -887,7 +887,6 @@ static int rbd_do_request(struct request *rq, struct timespec mtime = CURRENT_TIME; struct rbd_request *req_data; struct ceph_osd_request_head *reqhead; - struct rbd_image_header *header = &dev->header; struct ceph_osd_client *osdc; req_data = kzalloc(sizeof(*req_data), GFP_NOIO); @@ -905,13 +904,13 @@ static int rbd_do_request(struct request *rq, dout("rbd_do_request obj=%s ofs=%lld len=%lld\n", obj, len, ofs); - down_read(&header->snap_rwsem); + down_read(&dev->header_rwsem); osdc = &dev->rbd_client->client->osdc; req = ceph_osdc_alloc_request(osdc, flags, snapc, ops, false, GFP_NOIO, pages, bio); if (!req) { - up_read(&header->snap_rwsem); + up_read(&dev->header_rwsem); ret = -ENOMEM; goto done_pages; } @@ -946,7 +945,7 @@ static int rbd_do_request(struct request *rq, snapc, &mtime, req->r_oid, req->r_oid_len); - up_read(&header->snap_rwsem); + up_read(&dev->header_rwsem); if (linger_req) { ceph_osdc_set_request_linger(osdc, req); @@ -1718,7 +1717,7 @@ static int __rbd_update_snaps(struct rbd_device *rbd_dev) /* resized? */ set_capacity(rbd_dev->disk, h.image_size / SECTOR_SIZE); - down_write(&rbd_dev->header.snap_rwsem); + down_write(&rbd_dev->header_rwsem); snap_seq = rbd_dev->header.snapc->seq; if (rbd_dev->header.total_snaps && @@ -1743,7 +1742,7 @@ static int __rbd_update_snaps(struct rbd_device *rbd_dev) ret = __rbd_init_snaps_header(rbd_dev); - up_write(&rbd_dev->header.snap_rwsem); + up_write(&rbd_dev->header_rwsem); return ret; } @@ -2380,8 +2379,9 @@ static ssize_t rbd_add(struct bus_type *bus, spin_lock_init(&rbd_dev->lock); INIT_LIST_HEAD(&rbd_dev->node); INIT_LIST_HEAD(&rbd_dev->snaps); + init_rwsem(&rbd_dev->header_rwsem); - init_rwsem(&rbd_dev->header.snap_rwsem); + init_rwsem(&rbd_dev->header_rwsem); /* generate unique id: find highest unique id, add one */ rbd_id_get(rbd_dev); |