linux.git/drivers/md/dm-snap.c, branch v2.6.31

dm snapshot: implement iterate devices

2009-09-04T19:40:19+00:00

Implement the .iterate_devices for the origin and snapshot targets.
dm-snapshot's lack of .iterate_devices resulted in the inability to
properly establish queue_limits for both targets.

With 4K sector drives: an unfortunate side-effect of not establishing
proper limits in either targets' DM device was that IO to the devices
would fail even though both had been created without error.

Commit af4874e03ed82f050d5872d8c39ce64bf16b5c38 ("dm target:s introduce
iterate devices fn") in 2.6.31-rc1 should have implemented .iterate_devices
for dm-snap.c's origin and snapshot targets.

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

dm snapshot: support barriers

2009-06-22T09:12:25+00:00

Flush support for dm-snapshot target.

This patch just forwards the flush request to either the origin or the snapshot
device.  (It doesn't flush exception store metadata.)

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

block: move bio list helpers into bio.h

2009-04-15T06:28:09+00:00

It's used by DM and MD and generally useful, so move the bio list
helpers into bio.h.

Signed-off-by: Christoph Hellwig 
Acked-by: Alasdair G Kergon 
Signed-off-by: Jens Axboe

dm snapshot: move status to exception store

2009-04-02T18:55:35+00:00

Let the exception store types print out their status through
the new API, rather than having the snapshot code do it.

Adjust the buffer position to allow for the preceding DMEMIT in the
arguments to type->status().

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm snapshot: move ctr parsing to exception store

2009-04-02T18:55:34+00:00

First step of having the exception stores parse their own arguments -
generalizing the interface.

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm snapshot: use DMEMIT macro for status

2009-04-02T18:55:34+00:00

Use DMEMIT in place of snprintf.  This makes it easier later when
other modules are helping to populate our status output.

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm snapshot: remove dm_snap header

2009-04-02T18:55:34+00:00

Move some of the last bits from dm-snap.h into dm-snap.c where they
belong and remove dm-snap.h.

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm snapshot: remove dm_snap header use

2009-04-02T18:55:33+00:00

Move useful functions out of dm-snap.h and stop using dm-snap.h.

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm exception store: move cow pointer

2009-04-02T18:55:33+00:00

Move COW device from snapshot to exception store.

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm exception store: move chunk_fields

2009-04-02T18:55:32+00:00

Move chunk fields from snapshot to exception store.

Signed-off-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon