In rbd_header_set_snap(), there is logic to make the snap context's seq field get set to a particular snapshot id, or 0 if there is no snapshot for the rbd image.
This seems to be an artifact of how the current snapshot id for an rbd_dev was recorded before the rbd_dev->snap_id field began to be used for that purpose. There's no need to update the value of snapc->seq here any more, so stop doing it. Tidy up a few local variables in that function while we're at it. Signed-off-by: Alex Elder <[email protected]> --- drivers/block/rbd.c | 18 +++++++----------- 1 files changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 8a46599..ac8a83f 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -588,29 +588,25 @@ static int snap_by_name(struct rbd_image_header *header, const char *snap_name, static int rbd_header_set_snap(struct rbd_device *rbd_dev, u64 *size) { - struct rbd_image_header *header = &rbd_dev->header; - struct ceph_snap_context *snapc = header->snapc; - int ret = -ENOENT; + int ret; down_write(&rbd_dev->header_rwsem); if (!memcmp(rbd_dev->snap_name, RBD_SNAP_HEAD_NAME, sizeof (RBD_SNAP_HEAD_NAME))) { - if (header->total_snaps) - snapc->seq = header->snap_seq; - else - snapc->seq = 0; rbd_dev->snap_id = CEPH_NOSNAP; rbd_dev->snap_exists = false; rbd_dev->read_only = 0; if (size) - *size = header->image_size; + *size = rbd_dev->header.image_size; } else { - ret = snap_by_name(header, rbd_dev->snap_name, - &snapc->seq, size); + u64 snap_id = 0; + + ret = snap_by_name(&rbd_dev->header, rbd_dev->snap_name, + &snap_id, size); if (ret < 0) goto done; - rbd_dev->snap_id = snapc->seq; + rbd_dev->snap_id = snap_id; rbd_dev->snap_exists = true; rbd_dev->read_only = 1; } -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
