linux-toradex.git/block/blk-lib.c, branch v2.6.36.4

block: add secure discard

2010-08-12T15:43:30+00:00

Secure discard is the same as discard except that all copies of the
discarded sectors (perhaps created by garbage collection) must also be
erased.

Signed-off-by: Adrian Hunter 
Acked-by: Jens Axboe 
Cc: Kyungmin Park 
Cc: Madhusudhan Chikkature 
Cc: Christoph Hellwig 
Cc: Ben Gardiner 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

blkdev: fix blkdev_issue_zeroout return value

2010-08-08T16:31:08+00:00

- If function called without barrier option retvalue is incorrect

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jens Axboe

block: fix problem with sending down discard that isn't of correct granularity

2010-08-07T16:26:33+00:00

If the queue doesn't have a limit set, or it just set UINT_MAX like
we default to, we coud be sending down a discard request that isn't
of the correct granularity if the block size is > 512b.

Fix this by adjusting max_discard_sectors down to the proper
alignment.

Signed-off-by: Jens Axboe

block: don't allocate a payload for discard request

2010-08-07T16:23:08+00:00

Allocating a fixed payload for discard requests always was a horrible hack,
and it's not coming to byte us when adding support for discard in DM/MD.

So change the code to leave the allocation of a payload to the lowlevel
driver.  Unfortunately that means we'll need another hack, which allows
us to update the various block layer length fields indicating that we
have a payload.  Instead of hiding this in sd.c, which we already partially
do for UNMAP support add a documented helper in the core block layer for it.

Signed-off-by: Christoph Hellwig 
Acked-by: Mike Snitzer 
Signed-off-by: Jens Axboe

block: fix bad use of min() on different types

2010-04-29T07:28:21+00:00

Just cast the page size to sector_t, that will always fit.

Signed-off-by: Jens Axboe

blkdev: add blkdev_issue_zeroout helper function

2010-04-28T17:47:36+00:00

- Add bio_batch helper primitive. This is rather generic primitive
  for submitting/waiting a complex request which consists of several
  bios.
- blkdev_issue_zeroout() generate number of zero filed write bios.

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jens Axboe

blkdev: move blkdev_issue helper functions to separate file

2010-04-28T17:47:36+00:00

Move blkdev_issue_discard from blk-barrier.c because it is
not barrier related.
Later the file will be populated by other helpers.

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jens Axboe