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rbd: send header version when notifying 

Previously the original header version was sent. Now, we update it
when the header changes.

Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com>
Reviewed-by: Alex Elder <elder@inktank.com>
This commit is contained in:
Josh Durgin 2011-12-05 18:10:44 -08:00 committed by Sage Weil
parent d1d2564654
commit a71b891bc7
1 changed files with 5 additions and 2 deletions
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7
drivers/block/rbd.c
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@ -1197,7 +1197,7 @@ static int rbd_req_sync_notify_ack(struct rbd_device *rbd_dev,
if (ret < 0)
return ret;
ops[0].watch.ver = cpu_to_le64(rbd_dev->header.obj_version);
ops[0].watch.ver = cpu_to_le64(ver);
ops[0].watch.cookie = notify_id;
ops[0].watch.flag = 0;
@ -1216,6 +1216,7 @@ static int rbd_req_sync_notify_ack(struct rbd_device *rbd_dev,
static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data)
{
struct rbd_device *rbd_dev = (struct rbd_device *)data;
u64 hver;
int rc;
if (!rbd_dev)
@ -1225,12 +1226,13 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data)
rbd_dev->header_name, notify_id, (int) opcode);
mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING);
rc = __rbd_refresh_header(rbd_dev);
hver = rbd_dev->header.obj_version;
mutex_unlock(&ctl_mutex);
if (rc)
pr_warning(RBD_DRV_NAME "%d got notification but failed to "
" update snaps: %d\n", rbd_dev->major, rc);
rbd_req_sync_notify_ack(rbd_dev, ver, notify_id, rbd_dev->header_name);
rbd_req_sync_notify_ack(rbd_dev, hver, notify_id, rbd_dev->header_name);
}
/*
@ -1746,6 +1748,7 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev)
/* osd requests may still refer to snapc */
ceph_put_snap_context(rbd_dev->header.snapc);
rbd_dev->header.obj_version = h.obj_version;
rbd_dev->header.image_size = h.image_size;
rbd_dev->header.total_snaps = h.total_snaps;
rbd_dev->header.snapc = h.snapc;