linux-toradex.git/drivers/md/dm-exception-store.c, branch v4.0.7

dm: replace simple_strtoul

2012-07-27T14:07:59+00:00

Replace obsolete simple_strtoul() with kstrtou8/kstrtouint.

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

dm exception store: fix init error path

2012-03-28T17:41:22+00:00

Call the correct exit function on failure in dm_exception_store_init.

Signed-off-by: Andrei Warkentin 
Acked-by: Mike Snitzer 
Cc: stable@kernel.org
Signed-off-by: Alasdair G Kergon

md: Add module.h to all files using it implicitly

2011-10-31T23:31:18+00:00

A pending cleanup will mean that module.h won't be implicitly
everywhere anymore.  Make sure the modular drivers in md dir
are actually calling out for  explicitly in advance.

Signed-off-by: Paul Gortmaker

dm snapshot: test chunk size against both origin and snapshot

2010-08-12T03:13:51+00:00

Validate chunk size against both origin and snapshot sector size

Don't allow chunk size smaller than either origin or snapshot logical
sector size. Reading or writing data not aligned to sector size is not
allowed and causes immediate errors.

This requires us to open the origin before initialising the
exception store and to export dm_snap_origin.

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka 
Reviewed-by: Mike Snitzer 
Signed-off-by: Alasdair G Kergon

dm snapshot: move cow ref from exception store to snap core

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

Store the reference to the snapshot cow device in the core snapshot
code instead of each exception store.  It can be accessed through the
new function dm_snap_cow().  Exception stores should each now maintain a
reference to their parent snapshot struct.

This is cleaner and makes part of the forthcoming snapshot merge code simpler.

Signed-off-by: Mike Snitzer 
Signed-off-by: Alasdair G Kergon 
Reviewed-by: Jonathan Brassow 
Cc: Mikulas Patocka

dm exception store: free tmp_store on persistent flag error

2009-12-10T23:51:52+00:00

Error handling code following a kmalloc should free the allocated data.

Cc: stable@kernel.org
Signed-off-by: Julia Lawall 
Signed-off-by: Alasdair G Kergon

dm snapshot: allow chunk size to be less than page size

2009-10-16T22:18:22+00:00

Allow the snapshot chunk size to be smaller than the page size
The code is now capable of handling this due to some previous
fixes and enhancements.

As the page size varies between computers, prior to this patch,
the chunk size of a snapshot dictated which machines could read it:
Snapshots created on one machine might not be readable on another.

Signed-off-by: Mikulas Patocka 
Reviewed-by: Mike Snitzer 
Reviewed-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm snapshot: use unsigned integer chunk size

2009-10-16T22:18:17+00:00

Use unsigned integer chunk size.

Maximum chunk size is 512kB, there won't ever be need to use 4GB chunk size,
so the number can be 32-bit. This fixes compiler failure on 32-bit systems
with large block devices.

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka 
Signed-off-by: Mike Snitzer 
Reviewed-by: Jonathan Brassow 
Signed-off-by: Alasdair G Kergon

dm exception store: fix failed set_chunk_size error path

2009-10-16T22:18:16+00:00

Properly close the device if failing because of an invalid chunk size.

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka 
Signed-off-by: Alasdair G Kergon

dm snapshot: fix on disk chunk size validation

2009-09-04T19:40:43+00:00

Fix some problems seen in the chunk size processing when activating a
pre-existing snapshot.

For a new snapshot, the chunk size can either be supplied by the creator
or a default value can be used.  For an existing snapshot, the
chunk size in the snapshot header on disk should always be used.

If someone attempts to load an existing snapshot and has the 'default
chunk size' option set, the kernel uses its default value even when it
is incorrect for the snapshot being loaded.  This patch ensures the
correct on-disk value is always used.

Secondly, when the code does use the chunk size stored on the disk it is
prudent to revalidate it, so the code can exit cleanly if it got
corrupted as happened in
https://bugzilla.redhat.com/show_bug.cgi?id=461506 .

Cc: stable@kernel.org
Signed-off-by: Mikulas Patocka 
Signed-off-by: Alasdair G Kergon