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| author | Guoqing Jiang <gqjiang@suse.com> | 2015-07-10 10:54:04 +0200 |
|---|---|---|
| committer | NeilBrown <neilb@suse.com> | 2015-08-31 19:41:12 +0200 |
| commit | dc737d7c3d62d2cd2b62c7739aaa7604330c3dd8 (patch) | |
| tree | eb08d1d362a790b99afa255464a0db3741558362 /drivers/md/md-cluster.c | |
| parent | md-cluster: split recover_slot for future code reuse (diff) | |
| download | linux-dc737d7c3d62d2cd2b62c7739aaa7604330c3dd8.tar.xz linux-dc737d7c3d62d2cd2b62c7739aaa7604330c3dd8.zip | |
md-cluster: transfer the resync ownership to another node
When node A stops an array while the array is doing a resync, we need
to let another node B take over the resync task.
To achieve the goal, we need the A send an explicit BITMAP_NEEDS_SYNC
message to the cluster. And the node B which received that message will
invoke __recover_slot to do resync.
Reviewed-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Diffstat (limited to 'drivers/md/md-cluster.c')
| -rw-r--r-- | drivers/md/md-cluster.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/md/md-cluster.c b/drivers/md/md-cluster.c index 24caabef10cd..47199addae04 100644 --- a/drivers/md/md-cluster.c +++ b/drivers/md/md-cluster.c @@ -75,6 +75,7 @@ enum msg_type { NEWDISK, REMOVE, RE_ADD, + BITMAP_NEEDS_SYNC, }; struct cluster_msg { @@ -454,6 +455,11 @@ static void process_recvd_msg(struct mddev *mddev, struct cluster_msg *msg) __func__, __LINE__, msg->slot); process_readd_disk(mddev, msg); break; + case BITMAP_NEEDS_SYNC: + pr_info("%s: %d Received BITMAP_NEEDS_SYNC from %d\n", + __func__, __LINE__, msg->slot); + __recover_slot(mddev, msg->slot); + break; default: pr_warn("%s:%d Received unknown message from %d\n", __func__, __LINE__, msg->slot); @@ -814,8 +820,17 @@ static int resync_start(struct mddev *mddev, sector_t lo, sector_t hi) static void resync_finish(struct mddev *mddev) { + struct md_cluster_info *cinfo = mddev->cluster_info; + struct cluster_msg cmsg; + int slot = cinfo->slot_number - 1; + pr_info("%s:%d\n", __func__, __LINE__); resync_send(mddev, RESYNCING, 0, 0); + if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { + cmsg.type = cpu_to_le32(BITMAP_NEEDS_SYNC); + cmsg.slot = cpu_to_le32(slot); + sendmsg(cinfo, &cmsg); + } } static int area_resyncing(struct mddev *mddev, int direction, |