diff options
| -rw-r--r-- | drivers/block/rbd.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 64a4dd5..b8b8271 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -2206,6 +2206,40 @@ out: return ret; } +static int _rbd_dev_v2_snap_features(struct rbd_device *rbd_dev, u64 snap_id, + u64 *snap_features) +{ + __le64 snapid = cpu_to_le64(snap_id); + struct { + __le64 features; + __le64 incompat; + } features_buf = { 0 }; + int ret; + + ret = rbd_req_sync_exec(rbd_dev, rbd_dev->header_name, + "rbd", "get_features", + (char *) &snapid, sizeof (snapid), + (char *) &features_buf, sizeof (features_buf), + CEPH_OSD_FLAG_READ, NULL); + dout("%s: rbd_req_sync_exec returned %d\n", __func__, ret); + if (ret < 0) + return ret; + *snap_features = le64_to_cpu(features_buf.features); + + dout(" snap_id 0x%016llx features = 0x%016llx incompat = 0x%016llx\n", + (unsigned long long) snap_id, + (unsigned long long) *snap_features, + (unsigned long long) le64_to_cpu(features_buf.incompat)); + + return 0; +} + +static int rbd_dev_v2_features(struct rbd_device *rbd_dev) +{ + return _rbd_dev_v2_snap_features(rbd_dev, CEPH_NOSNAP, + &rbd_dev->header.features); +} + /* * Scan the rbd device's current snapshot list and compare it to the * newly-received snapshot context. Remove any existing snapshots @@ -2739,6 +2773,12 @@ static int rbd_dev_v2_probe(struct rbd_device *rbd_dev) ret = rbd_dev_v2_object_prefix(rbd_dev); if (ret < 0) goto out_err; + + /* Get the features for the image */ + + ret = rbd_dev_v2_features(rbd_dev); + if (ret < 0) + goto out_err; rbd_dev->image_format = 2; dout("discovered version 2 image, header name is %s\n", |