block: remove blk-exec.c

All this code is tightly coupled to the blk-mq core, so move it
there.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20211117061404.331732-4-hch@lst.de
[axboe: remove doc generation for blk-exec.c]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2021-11-17 07:13:56 +01:00 committed by Jens Axboe
parent 786d4e01c5
commit 4054cff92c
5 changed files with 108 additions and 122 deletions

View File

@ -294,9 +294,6 @@ Block Devices
.. kernel-doc:: block/blk-settings.c
:export:
.. kernel-doc:: block/blk-exec.c
:export:
.. kernel-doc:: block/blk-flush.c
:export:

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@ -292,8 +292,6 @@ block/blk-sysfs.c
block/blk-settings.c
block/blk-exec.c
block/blk-flush.c
block/blk-lib.c

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@ -5,7 +5,7 @@
obj-y := bdev.o fops.o bio.o elevator.o blk-core.o blk-sysfs.o \
blk-flush.o blk-settings.o blk-ioc.o blk-map.o \
blk-exec.o blk-merge.o blk-timeout.o \
blk-merge.o blk-timeout.o \
blk-lib.o blk-mq.o blk-mq-tag.o blk-stat.o \
blk-mq-sysfs.o blk-mq-cpumap.o blk-mq-sched.o ioctl.o \
genhd.o ioprio.o badblocks.o partitions/ blk-rq-qos.o \

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@ -1,116 +0,0 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Functions related to setting various queue properties from drivers
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/blk-mq.h>
#include <linux/sched/sysctl.h>
#include "blk.h"
#include "blk-mq-sched.h"
/**
* blk_end_sync_rq - executes a completion event on a request
* @rq: request to complete
* @error: end I/O status of the request
*/
static void blk_end_sync_rq(struct request *rq, blk_status_t error)
{
struct completion *waiting = rq->end_io_data;
rq->end_io_data = (void *)(uintptr_t)error;
/*
* complete last, if this is a stack request the process (and thus
* the rq pointer) could be invalid right after this complete()
*/
complete(waiting);
}
/**
* blk_execute_rq_nowait - insert a request to I/O scheduler for execution
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
* @done: I/O completion handler
*
* Description:
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution. Don't wait for completion.
*
* Note:
* This function will invoke @done directly if the queue is dead.
*/
void blk_execute_rq_nowait(struct gendisk *bd_disk, struct request *rq,
int at_head, rq_end_io_fn *done)
{
WARN_ON(irqs_disabled());
WARN_ON(!blk_rq_is_passthrough(rq));
rq->rq_disk = bd_disk;
rq->end_io = done;
blk_account_io_start(rq);
/*
* don't check dying flag for MQ because the request won't
* be reused after dying flag is set
*/
blk_mq_sched_insert_request(rq, at_head, true, false);
}
EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
static bool blk_rq_is_poll(struct request *rq)
{
if (!rq->mq_hctx)
return false;
if (rq->mq_hctx->type != HCTX_TYPE_POLL)
return false;
if (WARN_ON_ONCE(!rq->bio))
return false;
return true;
}
static void blk_rq_poll_completion(struct request *rq, struct completion *wait)
{
do {
bio_poll(rq->bio, NULL, 0);
cond_resched();
} while (!completion_done(wait));
}
/**
* blk_execute_rq - insert a request into queue for execution
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
*
* Description:
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution and wait for completion.
* Return: The blk_status_t result provided to blk_mq_end_request().
*/
blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq, int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
unsigned long hang_check;
rq->end_io_data = &wait;
blk_execute_rq_nowait(bd_disk, rq, at_head, blk_end_sync_rq);
/* Prevent hang_check timer from firing at us during very long I/O */
hang_check = sysctl_hung_task_timeout_secs;
if (blk_rq_is_poll(rq))
blk_rq_poll_completion(rq, &wait);
else if (hang_check)
while (!wait_for_completion_io_timeout(&wait, hang_check * (HZ/2)));
else
wait_for_completion_io(&wait);
return (blk_status_t)(uintptr_t)rq->end_io_data;
}
EXPORT_SYMBOL(blk_execute_rq);

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@ -28,6 +28,7 @@
#include <linux/crash_dump.h>
#include <linux/prefetch.h>
#include <linux/blk-crypto.h>
#include <linux/sched/sysctl.h>
#include <trace/events/block.h>
@ -1058,6 +1059,112 @@ void blk_mq_start_request(struct request *rq)
}
EXPORT_SYMBOL(blk_mq_start_request);
/**
* blk_end_sync_rq - executes a completion event on a request
* @rq: request to complete
* @error: end I/O status of the request
*/
static void blk_end_sync_rq(struct request *rq, blk_status_t error)
{
struct completion *waiting = rq->end_io_data;
rq->end_io_data = (void *)(uintptr_t)error;
/*
* complete last, if this is a stack request the process (and thus
* the rq pointer) could be invalid right after this complete()
*/
complete(waiting);
}
/**
* blk_execute_rq_nowait - insert a request to I/O scheduler for execution
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
* @done: I/O completion handler
*
* Description:
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution. Don't wait for completion.
*
* Note:
* This function will invoke @done directly if the queue is dead.
*/
void blk_execute_rq_nowait(struct gendisk *bd_disk, struct request *rq,
int at_head, rq_end_io_fn *done)
{
WARN_ON(irqs_disabled());
WARN_ON(!blk_rq_is_passthrough(rq));
rq->rq_disk = bd_disk;
rq->end_io = done;
blk_account_io_start(rq);
/*
* don't check dying flag for MQ because the request won't
* be reused after dying flag is set
*/
blk_mq_sched_insert_request(rq, at_head, true, false);
}
EXPORT_SYMBOL_GPL(blk_execute_rq_nowait);
static bool blk_rq_is_poll(struct request *rq)
{
if (!rq->mq_hctx)
return false;
if (rq->mq_hctx->type != HCTX_TYPE_POLL)
return false;
if (WARN_ON_ONCE(!rq->bio))
return false;
return true;
}
static void blk_rq_poll_completion(struct request *rq, struct completion *wait)
{
do {
bio_poll(rq->bio, NULL, 0);
cond_resched();
} while (!completion_done(wait));
}
/**
* blk_execute_rq - insert a request into queue for execution
* @bd_disk: matching gendisk
* @rq: request to insert
* @at_head: insert request at head or tail of queue
*
* Description:
* Insert a fully prepared request at the back of the I/O scheduler queue
* for execution and wait for completion.
* Return: The blk_status_t result provided to blk_mq_end_request().
*/
blk_status_t blk_execute_rq(struct gendisk *bd_disk, struct request *rq,
int at_head)
{
DECLARE_COMPLETION_ONSTACK(wait);
unsigned long hang_check;
rq->end_io_data = &wait;
blk_execute_rq_nowait(bd_disk, rq, at_head, blk_end_sync_rq);
/* Prevent hang_check timer from firing at us during very long I/O */
hang_check = sysctl_hung_task_timeout_secs;
if (blk_rq_is_poll(rq))
blk_rq_poll_completion(rq, &wait);
else if (hang_check)
while (!wait_for_completion_io_timeout(&wait,
hang_check * (HZ/2)))
;
else
wait_for_completion_io(&wait);
return (blk_status_t)(uintptr_t)rq->end_io_data;
}
EXPORT_SYMBOL(blk_execute_rq);
static void __blk_mq_requeue_request(struct request *rq)
{
struct request_queue *q = rq->q;