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  1. 13 10月, 2015 6 次提交
  3. 12 10月, 2015 10 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: Perform a lazy update · 2aa82191
      由 Goldwyn Rodrigues 提交于 
      In a clustered environment, a change such as marking a device faulty,
can be recorded by any of the nodes. This is communicated to all the
nodes and re-recording such a change is unnecessary, and quite often
pretty disruptive.

With this patch, just before the update, we detect for the changes
and if the changes are already in superblock, we abort the update
after clearing all the flags
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      2aa82191
    • 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: remove_and_add_spares() to activate specific rdev · 2910ff17
      由 Goldwyn Rodrigues 提交于 
      remove_and_add_spares() checks for all devices to activate spare.
Change it to activate a specific device if a non-null rdev
argument is passed.

remove_and_add_spares() can be used to activate spares in
slot_store() as well.

For hot_remove_disk(), check if rdev->raid_disk == -1 before
calling remove_and_add_spares()
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
      2910ff17
    • 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: Increment version for clustered bitmaps · 3c462c88
      由 Goldwyn Rodrigues 提交于 
      Add BITMAP_MAJOR_CLUSTERED as 5, in order to prevent older kernels
to assemble a clustered device.

In order to maximize compatibility, the major version is set to
BITMAP_MAJOR_CLUSTERED *only* if the bitmap is clustered.

Added MD_FEATURE_CLUSTERED in order to return error for older
kernels which would assemble MD even if the bitmap is corrupted.
Signed-off-by: NGoldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NNeilBrown <neilb@suse.com>
      3c462c88
    • 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
  5. 02 10月, 2015 8 次提交
  7. 12 9月, 2015 1 次提交
  9. 01 9月, 2015 15 次提交