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authorGuoqing Jiang <gqjiang@suse.com>2016-05-04 09:17:09 +0300
committerShaohua Li <shli@fb.com>2016-05-09 19:24:03 +0300
commit51e453aecb267b6a99b1d2853bccd5bba7340236 (patch)
treec1a405b2f33b0798da25fa3e410d760c1364dc22 /drivers/md/md-cluster.h
parent85ad1d13ee9b3db00615ea24b031c15e5ba14fd1 (diff)
downloadlinux-51e453aecb267b6a99b1d2853bccd5bba7340236.tar.xz
md-cluster: gather resync infos and enable recv_thread after bitmap is ready
The in-memory bitmap is not ready when node joins cluster, so it doesn't make sense to make gather_all_resync_info() called so earlier, we need to call it after the node's bitmap is setup. Also, recv_thread could be wake up after node joins cluster, but it could cause problem if node receives RESYNCING message without persionality since mddev->pers->quiesce is called in process_suspend_info. This commit introduces a new cluster interface load_bitmaps to fix above problems, load_bitmaps is called in bitmap_load where bitmap and persionality are ready, and load_bitmaps does the following tasks: 1. call gather_all_resync_info to load all the node's bitmap info. 2. set MD_CLUSTER_ALREADY_IN_CLUSTER bit to recv_thread could be wake up, and wake up recv_thread if there is pending recv event. Then ack_bast only wakes up recv_thread after IN_CLUSTER bit is ready otherwise MD_CLUSTER_PENDING_RESYNC_EVENT is set. Reviewed-by: NeilBrown <neilb@suse.com> Signed-off-by: Guoqing Jiang <gqjiang@suse.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/md-cluster.h')
-rw-r--r--drivers/md/md-cluster.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/md-cluster.h b/drivers/md/md-cluster.h
index 45ce6c97d8bd..e765499ba591 100644
--- a/drivers/md/md-cluster.h
+++ b/drivers/md/md-cluster.h
@@ -23,6 +23,7 @@ struct md_cluster_operations {
void (*add_new_disk_cancel)(struct mddev *mddev);
int (*new_disk_ack)(struct mddev *mddev, bool ack);
int (*remove_disk)(struct mddev *mddev, struct md_rdev *rdev);
+ void (*load_bitmaps)(struct mddev *mddev, int total_slots);
int (*gather_bitmaps)(struct md_rdev *rdev);
int (*lock_all_bitmaps)(struct mddev *mddev);
void (*unlock_all_bitmaps)(struct mddev *mddev);