linux-stable.git/block/blk-exec.c, branch v5.13.2

block: drop removed argument from kernel-doc of blk_execute_rq()

2021-01-29T14:43:29+00:00

Commit 684da7628d93 ("block: remove unnecessary argument from
blk_execute_rq") changes the signature of blk_execute_rq(), but misses
to adjust its kernel-doc.

Hence, make htmldocs warns on ./block/blk-exec.c:78:

  warning: Excess function parameter 'q' description in 'blk_execute_rq'

Drop removed argument from kernel-doc of blk_execute_rq() as well.

Signed-off-by: Lukas Bulwahn 
Acked-by: Guoqing Jiang 
Signed-off-by: Jens Axboe

block: remove unnecessary argument from blk_execute_rq

2021-01-25T04:52:39+00:00

We can remove 'q' from blk_execute_rq as well after the previous change
in blk_execute_rq_nowait.

And more importantly it never really was needed to start with given
that we can trivial derive it from struct request.

Cc: linux-scsi@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: linux-ide@vger.kernel.org
Cc: linux-mmc@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: linux-nfs@vger.kernel.org
Acked-by: Ulf Hansson  # for mmc
Signed-off-by: Guoqing Jiang 
Signed-off-by: Jens Axboe

block: remove unnecessary argument from blk_execute_rq_nowait

2021-01-25T04:52:39+00:00

The 'q' is not used since commit a1ce35fa4985 ("block: remove dead
elevator code"), also update the comment of the function.

And more importantly it never really was needed to start with given
that we can trivial derive it from struct request.

Cc: target-devel@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Cc: linux-ide@vger.kernel.org
Cc: linux-mmc@vger.kernel.org
Cc: linux-nvme@lists.infradead.org
Cc: linux-nfs@vger.kernel.org
Signed-off-by: Guoqing Jiang 
Signed-off-by: Jens Axboe

block: add a blk_account_io_merge_bio helper

2020-05-27T11:21:23+00:00

Move the non-"new_io" branch of blk_account_io_start() into separate
function.  Fix merge accounting for discards (they were counted as write
merges).

The new blk_account_io_merge_bio() doesn't call update_io_ticks() unlike
blk_account_io_start(), as there is no reason for that.

[hch: rebased]

Signed-off-by: Konstantin Khlebnikov 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: account statistics for passthrough requests

2019-10-10T23:52:31+00:00

Presently, passthrough requests are not accounted for because
blk_do_io_stat() expressly rejects them. Based on some digging
in the history, this doesn't seem like a concious decision but
one that evolved from the change from blk_fs_request() to
blk_rq_is_passthrough().

To support this, call blk_account_io_start() in blk_execute_rq_nowait()
and remove the passthrough check in blk_do_io_stat().

Link: https://lore.kernel.org/linux-block/20191010100526.GA27209@lst.de/
Signed-off-by: Logan Gunthorpe 
Cc: Jens Axboe 
Cc: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: add SPDX tags to block layer files missing licensing information

2019-04-30T22:12:03+00:00

Various block layer files do not have any licensing information at all.
Add SPDX tags for the default kernel GPLv2 license to those.

Reviewed-by: Chaitanya Kulkarni 
Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: remove dead elevator code

2018-11-07T20:42:32+00:00

This removes a bunch of core and elevator related code. On the core
front, we remove anything related to queue running, draining,
initialization, plugging, and congestions. We also kill anything
related to request allocation, merging, retrieval, and completion.

Remove any checking for single queue IO schedulers, as they no
longer exist. This means we can also delete a bunch of code related
to request issue, adding, completion, etc - and all the SQ related
ops and helpers.

Also kill the load_default_modules(), as all that did was provide
for a way to load the default single queue elevator.

Tested-by: Ming Lei 
Reviewed-by: Omar Sandoval 
Signed-off-by: Jens Axboe

blk-mq-sched: remove unused 'can_block' arg from blk_mq_sched_insert_request

2018-01-17T16:49:21+00:00

After commit:

923218f6166a ("blk-mq: don't allocate driver tag upfront for flush rq")

we no longer use the 'can_block' argument in
blk_mq_sched_insert_request(). Kill it.

Signed-off-by: Mike Snitzer 

Added actual commit message as to why it's being removed.

Signed-off-by: Jens Axboe

block: introduce new block status code type

2017-06-09T15:27:32+00:00

Currently we use nornal Linux errno values in the block layer, and while
we accept any error a few have overloaded magic meanings.  This patch
instead introduces a new  blk_status_t value that holds block layer specific
status codes and explicitly explains their meaning.  Helpers to convert from
and to the previous special meanings are provided for now, but I suspect
we want to get rid of them in the long run - those drivers that have a
errno input (e.g. networking) usually get errnos that don't know about
the special block layer overloads, and similarly returning them to userspace
will usually return somethings that strictly speaking isn't correct
for file system operations, but that's left as an exercise for later.

For now the set of errors is a very limited set that closely corresponds
to the previous overloaded errno values, but there is some low hanging
fruite to improve it.

blk_status_t (ab)uses the sparse __bitwise annotations to allow for sparse
typechecking, so that we can easily catch places passing the wrong values.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Jens Axboe

block: remove the errors field from struct request

2017-04-20T18:16:10+00:00

Signed-off-by: Christoph Hellwig 
Reviewed-by: Bart Van Assche 
Acked-by: Roger Pau Monné 
Reviewed-by: Konrad Rzeszutek Wilk 
Signed-off-by: Jens Axboe