md-cluster: Use a small window for resync
Suspending the entire device for resync could take too long. Resync in small chunks. cluster's resync window (32M) is maintained in r1conf as cluster_sync_low and cluster_sync_high and processed in raid1's sync_request(). If the current resync is outside the cluster resync window: 1. Set the cluster_sync_low to curr_resync_completed. 2. Check if the sync will fit in the new window, if not issue a wait_barrier() and set cluster_sync_low to sector_nr. 3. Set cluster_sync_high to cluster_sync_low + resync_window. 4. Send a message to all nodes so they may add it in their suspension list. bitmap_cond_end_sync is modified to allow to force a sync inorder to get the curr_resync_completed uptodate with the sector passed. Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Signed-off-by: NeilBrown <neilb@suse.de>
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@ -802,15 +802,6 @@ static int slot_number(struct mddev *mddev)
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return cinfo->slot_number - 1;
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}
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static void resync_info_update(struct mddev *mddev, sector_t lo, sector_t hi)
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{
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struct md_cluster_info *cinfo = mddev->cluster_info;
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add_resync_info(mddev, cinfo->bitmap_lockres, lo, hi);
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/* Re-acquire the lock to refresh LVB */
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dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW);
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}
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static int metadata_update_start(struct mddev *mddev)
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{
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return lock_comm(mddev->cluster_info);
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@ -836,45 +827,25 @@ static int metadata_update_cancel(struct mddev *mddev)
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return dlm_unlock_sync(cinfo->token_lockres);
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}
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static int resync_send(struct mddev *mddev, enum msg_type type,
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sector_t lo, sector_t hi)
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static int resync_info_update(struct mddev *mddev, sector_t lo, sector_t hi)
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{
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struct md_cluster_info *cinfo = mddev->cluster_info;
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struct cluster_msg cmsg;
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int slot = cinfo->slot_number - 1;
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add_resync_info(mddev, cinfo->bitmap_lockres, lo, hi);
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/* Re-acquire the lock to refresh LVB */
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dlm_lock_sync(cinfo->bitmap_lockres, DLM_LOCK_PW);
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pr_info("%s:%d lo: %llu hi: %llu\n", __func__, __LINE__,
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(unsigned long long)lo,
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(unsigned long long)hi);
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resync_info_update(mddev, lo, hi);
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cmsg.type = cpu_to_le32(type);
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cmsg.type = cpu_to_le32(RESYNCING);
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cmsg.slot = cpu_to_le32(slot);
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cmsg.low = cpu_to_le64(lo);
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cmsg.high = cpu_to_le64(hi);
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return sendmsg(cinfo, &cmsg);
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}
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static int resync_start(struct mddev *mddev, sector_t lo, sector_t hi)
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{
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pr_info("%s:%d\n", __func__, __LINE__);
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return resync_send(mddev, RESYNCING, lo, hi);
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}
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static void resync_finish(struct mddev *mddev)
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{
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struct md_cluster_info *cinfo = mddev->cluster_info;
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struct cluster_msg cmsg;
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int slot = cinfo->slot_number - 1;
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pr_info("%s:%d\n", __func__, __LINE__);
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resync_send(mddev, RESYNCING, 0, 0);
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if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) {
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cmsg.type = cpu_to_le32(BITMAP_NEEDS_SYNC);
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cmsg.slot = cpu_to_le32(slot);
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sendmsg(cinfo, &cmsg);
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}
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}
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static int area_resyncing(struct mddev *mddev, int direction,
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sector_t lo, sector_t hi)
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{
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@ -997,8 +968,6 @@ static struct md_cluster_operations cluster_ops = {
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.leave = leave,
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.slot_number = slot_number,
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.resync_info_update = resync_info_update,
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.resync_start = resync_start,
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.resync_finish = resync_finish,
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.metadata_update_start = metadata_update_start,
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.metadata_update_finish = metadata_update_finish,
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.metadata_update_cancel = metadata_update_cancel,
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