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block: remove the request_queue to argument request based tracepoints

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The request_queue can trivially be derived from the request.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2020-12-03 17:21:39 +01:00 committed by Jens Axboe
parent 1c02fca620
commit a54895fa05
8 changed files with 39 additions and 57 deletions
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2
block/blk-merge.c
View File

@ -799,7 +799,7 @@ static struct request *attempt_merge(struct request_queue *q,
*/
blk_account_io_merge_request(next);
trace_block_rq_merge(q, next);
trace_block_rq_merge(next);
/*
* ownership of bio passed from next to req, return 'next' for

2
block/blk-mq-sched.c
View File

@ -386,7 +386,7 @@ EXPORT_SYMBOL_GPL(blk_mq_sched_try_insert_merge);
void blk_mq_sched_request_inserted(struct request *rq)
{
trace_block_rq_insert(rq->q, rq);
trace_block_rq_insert(rq);
}
EXPORT_SYMBOL_GPL(blk_mq_sched_request_inserted);

8
block/blk-mq.c
View File

@ -733,7 +733,7 @@ void blk_mq_start_request(struct request *rq)
{
struct request_queue *q = rq->q;
trace_block_rq_issue(q, rq);
trace_block_rq_issue(rq);
if (test_bit(QUEUE_FLAG_STATS, &q->queue_flags)) {
rq->io_start_time_ns = ktime_get_ns();
@ -760,7 +760,7 @@ static void __blk_mq_requeue_request(struct request *rq)
blk_mq_put_driver_tag(rq);
trace_block_rq_requeue(q, rq);
trace_block_rq_requeue(rq);
rq_qos_requeue(q, rq);
if (blk_mq_request_started(rq)) {
@ -1821,7 +1821,7 @@ static inline void __blk_mq_insert_req_list(struct blk_mq_hw_ctx *hctx,
lockdep_assert_held(&ctx->lock);
trace_block_rq_insert(hctx->queue, rq);
trace_block_rq_insert(rq);
if (at_head)
list_add(&rq->queuelist, &ctx->rq_lists[type]);
@ -1878,7 +1878,7 @@ void blk_mq_insert_requests(struct blk_mq_hw_ctx *hctx, struct blk_mq_ctx *ctx,
*/
list_for_each_entry(rq, list, queuelist) {
BUG_ON(rq->mq_ctx != ctx);
trace_block_rq_insert(hctx->queue, rq);
trace_block_rq_insert(rq);
}
spin_lock(&ctx->lock);

2
drivers/md/dm-rq.c
View File

@ -397,7 +397,7 @@ static int map_request(struct dm_rq_target_io *tio)
}
/* The target has remapped the I/O so dispatch it */
trace_block_rq_remap(clone->q, clone, disk_devt(dm_disk(md)),
trace_block_rq_remap(clone, disk_devt(dm_disk(md)),
blk_rq_pos(rq));
ret = dm_dispatch_clone_request(clone, rq);
if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE) {

3
drivers/s390/scsi/zfcp_fsf.c
View File

@ -2359,8 +2359,7 @@ static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
}
}
blk_add_driver_data(scsi->request->q, scsi->request, &blktrc,
sizeof(blktrc));
blk_add_driver_data(scsi->request, &blktrc, sizeof(blktrc));
}
/**

5
include/linux/blktrace_api.h
View File

@ -75,8 +75,7 @@ static inline bool blk_trace_note_message_enabled(struct request_queue *q)
return ret;
}
extern void blk_add_driver_data(struct request_queue *q, struct request *rq,
void *data, size_t len);
extern void blk_add_driver_data(struct request *rq, void *data, size_t len);
extern int blk_trace_setup(struct request_queue *q, char *name, dev_t dev,
struct block_device *bdev,
char __user *arg);
@ -90,7 +89,7 @@ extern struct attribute_group blk_trace_attr_group;
#else /* !CONFIG_BLK_DEV_IO_TRACE */
# define blk_trace_ioctl(bdev, cmd, arg) (-ENOTTY)
# define blk_trace_shutdown(q) do { } while (0)
# define blk_add_driver_data(q, rq, data, len) do {} while (0)
# define blk_add_driver_data(rq, data, len) do {} while (0)
# define blk_trace_setup(q, name, dev, bdev, arg) (-ENOTTY)
# define blk_trace_startstop(q, start) (-ENOTTY)
# define blk_trace_remove(q) (-ENOTTY)

30
include/trace/events/block.h
View File

@ -64,7 +64,6 @@ DEFINE_EVENT(block_buffer, block_dirty_buffer,
/**
* block_rq_requeue - place block IO request back on a queue
* @q: queue holding operation
* @rq: block IO operation request
*
* The block operation request @rq is being placed back into queue
@ -73,9 +72,9 @@ DEFINE_EVENT(block_buffer, block_dirty_buffer,
*/
TRACE_EVENT(block_rq_requeue,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_PROTO(struct request *rq),
TP_ARGS(q, rq),
TP_ARGS(rq),
TP_STRUCT__entry(
__field( dev_t, dev )
@ -147,9 +146,9 @@ TRACE_EVENT(block_rq_complete,
DECLARE_EVENT_CLASS(block_rq,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_PROTO(struct request *rq),
TP_ARGS(q, rq),
TP_ARGS(rq),
TP_STRUCT__entry(
__field( dev_t, dev )
@ -181,7 +180,6 @@ DECLARE_EVENT_CLASS(block_rq,
/**
* block_rq_insert - insert block operation request into queue
* @q: target queue
* @rq: block IO operation request
*
* Called immediately before block operation request @rq is inserted
@ -191,14 +189,13 @@ DECLARE_EVENT_CLASS(block_rq,
*/
DEFINE_EVENT(block_rq, block_rq_insert,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_PROTO(struct request *rq),
TP_ARGS(q, rq)
TP_ARGS(rq)
);
/**
* block_rq_issue - issue pending block IO request operation to device driver
* @q: queue holding operation
* @rq: block IO operation operation request
*
* Called when block operation request @rq from queue @q is sent to a
@ -206,14 +203,13 @@ DEFINE_EVENT(block_rq, block_rq_insert,
*/
DEFINE_EVENT(block_rq, block_rq_issue,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_PROTO(struct request *rq),
TP_ARGS(q, rq)
TP_ARGS(rq)
);
/**
* block_rq_merge - merge request with another one in the elevator
* @q: queue holding operation
* @rq: block IO operation operation request
*
* Called when block operation request @rq from queue @q is merged to another
@ -221,9 +217,9 @@ DEFINE_EVENT(block_rq, block_rq_issue,
*/
DEFINE_EVENT(block_rq, block_rq_merge,
TP_PROTO(struct request_queue *q, struct request *rq),
TP_PROTO(struct request *rq),
TP_ARGS(q, rq)
TP_ARGS(rq)
);
/**
@ -491,7 +487,6 @@ TRACE_EVENT(block_bio_remap,
/**
* block_rq_remap - map request for a block operation request
* @q: queue holding the operation
* @rq: block IO operation request
* @dev: device for the operation
* @from: original sector for the operation
@ -502,10 +497,9 @@ TRACE_EVENT(block_bio_remap,
*/
TRACE_EVENT(block_rq_remap,
TP_PROTO(struct request_queue *q, struct request *rq, dev_t dev,
sector_t from),
TP_PROTO(struct request *rq, dev_t dev, sector_t from),
TP_ARGS(q, rq, dev, from),
TP_ARGS(rq, dev, from),
TP_STRUCT__entry(
__field( dev_t, dev )

44
kernel/trace/blktrace.c
View File

@ -795,12 +795,12 @@ static u64 blk_trace_bio_get_cgid(struct request_queue *q, struct bio *bio)
#endif
static u64
blk_trace_request_get_cgid(struct request_queue *q, struct request *rq)
blk_trace_request_get_cgid(struct request *rq)
{
if (!rq->bio)
return 0;
/* Use the first bio */
return blk_trace_bio_get_cgid(q, rq->bio);
return blk_trace_bio_get_cgid(rq->q, rq->bio);
}
/*
@ -841,40 +841,35 @@ static void blk_add_trace_rq(struct request *rq, int error,
rcu_read_unlock();
}
static void blk_add_trace_rq_insert(void *ignore,
struct request_queue *q, struct request *rq)
static void blk_add_trace_rq_insert(void *ignore, struct request *rq)
{
blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_INSERT,
blk_trace_request_get_cgid(q, rq));
blk_trace_request_get_cgid(rq));
}
static void blk_add_trace_rq_issue(void *ignore,
struct request_queue *q, struct request *rq)
static void blk_add_trace_rq_issue(void *ignore, struct request *rq)
{
blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_ISSUE,
blk_trace_request_get_cgid(q, rq));
blk_trace_request_get_cgid(rq));
}
static void blk_add_trace_rq_merge(void *ignore,
struct request_queue *q, struct request *rq)
static void blk_add_trace_rq_merge(void *ignore, struct request *rq)
{
blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_BACKMERGE,
blk_trace_request_get_cgid(q, rq));
blk_trace_request_get_cgid(rq));
}
static void blk_add_trace_rq_requeue(void *ignore,
struct request_queue *q,
struct request *rq)
static void blk_add_trace_rq_requeue(void *ignore, struct request *rq)
{
blk_add_trace_rq(rq, 0, blk_rq_bytes(rq), BLK_TA_REQUEUE,
blk_trace_request_get_cgid(q, rq));
blk_trace_request_get_cgid(rq));
}
static void blk_add_trace_rq_complete(void *ignore, struct request *rq,
int error, unsigned int nr_bytes)
{
blk_add_trace_rq(rq, error, nr_bytes, BLK_TA_COMPLETE,
blk_trace_request_get_cgid(rq->q, rq));
blk_trace_request_get_cgid(rq));
}
/**
@ -1037,16 +1032,14 @@ static void blk_add_trace_bio_remap(void *ignore, struct bio *bio, dev_t dev,
* Add a trace for that action.
*
**/
static void blk_add_trace_rq_remap(void *ignore,
struct request_queue *q,
struct request *rq, dev_t dev,
static void blk_add_trace_rq_remap(void *ignore, struct request *rq, dev_t dev,
sector_t from)
{
struct blk_trace *bt;
struct blk_io_trace_remap r;
rcu_read_lock();
bt = rcu_dereference(q->blk_trace);
bt = rcu_dereference(rq->q->blk_trace);
if (likely(!bt)) {
rcu_read_unlock();
return;
@ -1058,13 +1051,12 @@ static void blk_add_trace_rq_remap(void *ignore,
__blk_add_trace(bt, blk_rq_pos(rq), blk_rq_bytes(rq),
rq_data_dir(rq), 0, BLK_TA_REMAP, 0,
sizeof(r), &r, blk_trace_request_get_cgid(q, rq));
sizeof(r), &r, blk_trace_request_get_cgid(rq));
rcu_read_unlock();
}
/**
* blk_add_driver_data - Add binary message with driver-specific data
* @q: queue the io is for
* @rq: io request
* @data: driver-specific data
* @len: length of driver-specific data
@ -1073,14 +1065,12 @@ static void blk_add_trace_rq_remap(void *ignore,
* Some drivers might want to write driver-specific data per request.
*
**/
void blk_add_driver_data(struct request_queue *q,
struct request *rq,
void *data, size_t len)
void blk_add_driver_data(struct request *rq, void *data, size_t len)
{
struct blk_trace *bt;
rcu_read_lock();
bt = rcu_dereference(q->blk_trace);
bt = rcu_dereference(rq->q->blk_trace);
if (likely(!bt)) {
rcu_read_unlock();
return;
@ -1088,7 +1078,7 @@ void blk_add_driver_data(struct request_queue *q,
__blk_add_trace(bt, blk_rq_trace_sector(rq), blk_rq_bytes(rq), 0, 0,
BLK_TA_DRV_DATA, 0, len, data,
blk_trace_request_get_cgid(q, rq));
blk_trace_request_get_cgid(rq));
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(blk_add_driver_data);