diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/block/rbd.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 20147aec86f3..02cf7aba7679 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2971,6 +2971,59 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) } /* + * Send a (un)watch request and wait for the ack. Return a request + * with a ref held on success or error. + */ +static struct rbd_obj_request *rbd_obj_watch_request_helper( + struct rbd_device *rbd_dev, + bool watch) +{ + struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; + struct rbd_obj_request *obj_request; + int ret; + + obj_request = rbd_obj_request_create(rbd_dev->header_name, 0, 0, + OBJ_REQUEST_NODATA); + if (!obj_request) + return ERR_PTR(-ENOMEM); + + obj_request->osd_req = rbd_osd_req_create(rbd_dev, true, 1, + obj_request); + if (!obj_request->osd_req) { + ret = -ENOMEM; + goto out; + } + + osd_req_op_watch_init(obj_request->osd_req, 0, CEPH_OSD_OP_WATCH, + rbd_dev->watch_event->cookie, 0, watch); + rbd_osd_req_format_write(obj_request); + + if (watch) + ceph_osdc_set_request_linger(osdc, obj_request->osd_req); + + ret = rbd_obj_request_submit(osdc, obj_request); + if (ret) + goto out; + + ret = rbd_obj_request_wait(obj_request); + if (ret) + goto out; + + ret = obj_request->result; + if (ret) { + if (watch) + rbd_obj_request_end(obj_request); + goto out; + } + + return obj_request; + +out: + rbd_obj_request_put(obj_request); + return ERR_PTR(ret); +} + +/* * Initiate a watch request, synchronously. */ static int rbd_dev_header_watch_sync(struct rbd_device *rbd_dev) |