linux-toradex.git/fs/bio-integrity.c, branch v2.6.32.58

block: fix bugs in bio-integrity mempool usage

2010-02-09T12:50:58+00:00

commit 9e9432c267e4047db98b9d4fba95099c6effcef9 upstream.

Fix two bugs in the bio integrity code:

 use_bip_pool() always returns 0 because it checks against the wrong limit,
 causing the mempool to be used only when regular allocation fails.

 When the mempool is used as a fallback we don't free the data properly.

Signed-Off-By: Chuck Ebbert 
Acked-by: Martin K. Petersen 

Signed-off-by: Jens Axboe 
Signed-off-by: Greg Kroah-Hartman

block: Create bip slabs with embedded integrity vectors

2009-07-01T08:56:25+00:00

This patch restores stacking ability to the block layer integrity
infrastructure by creating a set of dedicated bip slabs.  Each bip slab
has an embedded bio_vec array at the end.  This cuts down on memory
allocations and also simplifies the code compared to the original bvec
version.  Only the largest bip slab is backed by a mempool.  The pool is
contained in the bio_set so stacking drivers can ensure forward
progress.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

block: add private bio_set for bio integrity allocations

2009-03-24T11:35:17+00:00

The integrity bio allocation needs its own bio_set to avoid violating
the mempool allocation rules and risking deadlocks.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

block: Add gfp_mask parameter to bio_integrity_clone()

2009-03-14T20:06:51+00:00

Stricter gfp_mask might be required for clone allocation.
For example, request-based dm may clone bio in interrupt context
so it has to use GFP_ATOMIC.

Signed-off-by: Kiyoshi Ueda 
Signed-off-by: Jun'ichi Nomura 
Acked-by: Martin K. Petersen 
Cc: Alasdair G Kergon 
Signed-off-by: Jens Axboe

block: Remove obsolete BUG_ON

2009-01-30T11:34:36+00:00

Now that bio_vecs are no longer cleared in bvec_alloc_bs() the following
BUG_ON must go.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

block: Don't verify integrity metadata on read error

2009-01-30T11:34:36+00:00

If we get an I/O error on a read request there is no point in doing a
verify pass on the integrity buffer.  Adjust the completion path
accordingly.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

bio: allow individual slabs in the bio_set

2008-12-29T07:29:23+00:00

Instead of having a global bio slab cache, add a reference to one
in each bio_set that is created. This allows for personalized slabs
in each bio_set, so that they can have bios of different sizes.

This means we can personalize the bios we return. File systems may
want to embed the bio inside another structure, to avoid allocation
more items (and stuffing them in ->bi_private) after the get a bio.
Or we may want to embed a number of bio_vecs directly at the end
of a bio, to avoid doing two allocations to return a bio. This is now
possible.

Signed-off-by: Jens Axboe

block: Introduce integrity data ownership flag

2008-10-09T06:56:21+00:00

A filesystem might supply its own integrity metadata.  Introduce a
flag that indicates whether the filesystem or the block layer owns the
integrity buffer.

Signed-off-by: Martin K. Petersen 
Signed-off-by: Jens Axboe

block: revert part of d7533ad0e132f92e75c1b2eb7c26387b25a583c1

2008-10-09T06:56:21+00:00

We need bdev_get_integrity() to support the pending md/dm patches.

Signed-off-by: Jens Axboe

block: cleanup some of the integrity stuff in blkdev.h

2008-10-09T06:56:17+00:00

Don't put functions that are only used in fs/bio-integrity.c in
blkdev.h, it's much cleaner to just keep it in there. Also kill
completely unused bdev_get_tag_size()

Signed-off-by: Jens Axboe