linux-toradex.git/include/linux/dm-dirty-log.h, branch v3.0.3

dm log: add flush callback fn

2009-12-10T23:52:01+00:00

Introduce a callback pointer from the log to dm-raid1 layer.

Before some region is set as "in-sync", we need to flush hardware cache on
all the disks. But the log module doesn't have access to the mirror_set
structure. So it will use this callback.

So far the callback is unused, it will be used in further patches.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Alasdair G Kergon

dm raid1: add is_remote_recovering hook for clusters

2009-04-02T18:55:30+00:00

The logging API needs an extra function to make cluster mirroring
possible.  This new function allows us to check whether a mirror
region is being recovered on another machine in the cluster.  This
helps us prevent simultaneous recovery I/O and process I/O to the
same locations on disk.

Cluster-aware log modules will implement this function.  Single
machine log modules will not.  So, there is no performance
penalty for single machine mirrors.

Signed-off-by: Jonathan Brassow 
Acked-by: Heinz Mauelshagen 
Signed-off-by: Alasdair G Kergon

dm log: remove struct dm_dirty_log_internal

2009-04-02T18:55:30+00:00

Remove the 'dm_dirty_log_internal' structure.  The resulting cleanup
eliminates extra memory allocations.  Therefore exposing the internal
list_head to the external 'dm_dirty_log_type' structure is a worthwhile
compromise.

Signed-off-by: Mike Snitzer 
Signed-off-by: Alasdair G Kergon

dm: move include files

2008-04-25T12:26:55+00:00

Publish the dm-io, dm-log and dm-kcopyd headers in include/linux.

Signed-off-by: Alasdair G Kergon