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  1. 06 1月, 2016 2 次提交
  3. 24 10月, 2015 4 次提交
  5. 16 10月, 2015 1 次提交
  7. 13 10月, 2015 6 次提交
  9. 12 10月, 2015 7 次提交
    • G
      md-cluster: Fix adding of new disk with new reload code · dbb64f86
      由 Goldwyn Rodrigues 提交于 
      Adding the disk worked incorrectly with the new reload code. Fix it:

 - No operation should be performed on rdev marked as Candidate
 - After a metadata update operation, kick disk if role is 0xfffe
   else clear Candidate bit and continue with the regular change check.
 - Saving the mode of the lock resource to check if token lock is already
   locked, because it can be called twice while adding a disk. However,
   unlock_comm() must be called only once.
 - add_new_disk() is called by the node initiating the --add operation.
   If it needs to be canceled, call add_new_disk_cancel(). The operation
   is completed by md_update_sb() which will write and unlock the
   communication.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      dbb64f86
    • G
      md-cluster: Perform resync/recovery under a DLM lock · c186b128
      由 Goldwyn Rodrigues 提交于 
      Resync or recovery must be performed by only one node at a time.
A DLM lock resource, resync_lockres provides the mutual exclusion
so that only one node performs the recovery/resync at a time.

If a node is unable to get the resync_lockres, because recovery is
being performed by another node, it set MD_RECOVER_NEEDED so as
to schedule recovery in the future.

Remove the debug message in resync_info_update()
used during development.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      c186b128
    • G
      md-cluster: Improve md_reload_sb to be less error prone · 70bcecdb
      由 Goldwyn Rodrigues 提交于 
      md_reload_sb is too simplistic and it explicitly needs to determine
the changes made by the writing node. However, there are multiple areas
where a simple reload could fail.

Instead, read the superblock of one of the "good" rdevs and update
the necessary information:

- read the superblock into a newly allocated page, by temporarily
  swapping out rdev->sb_page and calling ->load_super.
- if that fails return
- if it succeeds, call check_sb_changes
  1. iterates over list of active devices and checks the matching
   dev_roles[] value.
   	If that is 'faulty', the device must be  marked as faulty
	 - call md_error to mark the device as faulty. Make sure
	   not to set CHANGE_DEVS and wakeup mddev->thread or else
	   it would initiate a resync process, which is the responsibility
	   of the "primary" node.
	 - clear the Blocked bit
	 - Call remove_and_add_spares() to hot remove the device.
	If the device is 'spare':
	 - call remove_and_add_spares() to get the number of spares
	   added in this operation.
	 - Reduce mddev->degraded to mark the array as not degraded.
  2. reset recovery_cp
- read the rest of the rdevs to update recovery_offset. If recovery_offset
  is equal to MaxSector, call spare_active() to set it In_sync

This required that recovery_offset be initialized to MaxSector, as
opposed to zero so as to communicate the end of sync for a rdev.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      70bcecdb
    • G
      md-cluster: Wake up suspended process · b8ca846e
      由 Goldwyn Rodrigues 提交于 
      When the suspended_area is deleted, the suspended processes
must be woken up in order to complete their I/O.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      b8ca846e
    • G
      md-cluster: send BITMAP_NEEDS_SYNC when node is leaving cluster · 09995411
      由 Guoqing Jiang 提交于 
      Previously, BITMAP_NEEDS_SYNC message is sent when the resyc
aborts, but it could abort for different reasons, and not all
of reasons require another node to take over the resync ownship.

It is better make BITMAP_NEEDS_SYNC message only be sent when
the node is leaving cluster with dirty bitmap. And we also need
to ensure dlm connection is ok.
Signed-off-by: NGuoqing Jiang <gqjiang@suse.com>
Signed-off-by: NNeilBrown <neilb@suse.com>
      09995411
    • G
      md-cluster: Use a small window for resync · c40f341f
      由 Goldwyn Rodrigues 提交于 
      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: NGoldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NNeilBrown <neilb@suse.de>
      c40f341f
    • G
      md-cluster: complete all write requests before adding suspend_info · 9ed38ff5
      由 Goldwyn Rodrigues 提交于 
      process_suspend_info - which handles the RESYNCING request - must not
reply until all writes which were initiated before the request arrived,
have completed.

As a by-product, all process_* functions now take mddev as their
first arguement making it uniform.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NNeilBrown <neilb@suse.com>
      9ed38ff5
  11. 01 9月, 2015 12 次提交
  13. 24 7月, 2015 1 次提交
  15. 22 4月, 2015 3 次提交
  17. 21 3月, 2015 3 次提交
  19. 23 2月, 2015 1 次提交
    • G
      Add new disk to clustered array · 1aee41f6
      由 Goldwyn Rodrigues 提交于 
      Algorithm:
1. Node 1 issues mdadm --manage /dev/mdX --add /dev/sdYY which issues
   ioctl(ADD_NEW_DISC with disc.state set to MD_DISK_CLUSTER_ADD)
2. Node 1 sends NEWDISK with uuid and slot number
3. Other nodes issue kobject_uevent_env with uuid and slot number
(Steps 4,5 could be a udev rule)
4. In userspace, the node searches for the disk, perhaps
   using blkid -t SUB_UUID=""
5. Other nodes issue either of the following depending on whether the disk
   was found:
   ioctl(ADD_NEW_DISK with disc.state set to MD_DISK_CANDIDATE and
	 disc.number set to slot number)
   ioctl(CLUSTERED_DISK_NACK)
6. Other nodes drop lock on no-new-devs (CR) if device is found
7. Node 1 attempts EX lock on no-new-devs
8. If node 1 gets the lock, it sends METADATA_UPDATED after unmarking the disk
   as SpareLocal
9. If not (get no-new-dev lock), it fails the operation and sends METADATA_UPDATED
10. Other nodes understand if the device is added or not by reading the superblock again after receiving the METADATA_UPDATED message.
Signed-off-by: NLidong Zhong <lzhong@suse.com>
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      1aee41f6