[PATCH 4/5] block: remove the request_queue argument to the block_bio_remap tracepoint

Christoph Hellwig
2020-12-03T16:23:09Z

The request_queue can trivially be derived from the bio.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---
block/blk-core.c | 2 +-
drivers/md/dm.c | 3 +--
drivers/md/md-linear.c | 3 +--
drivers/md/md.c | 5 ++---
drivers/md/raid0.c | 4 ++--
drivers/md/raid1.c | 7 +++----
drivers/md/raid10.c | 6 ++----
drivers/md/raid5.c | 15 +++++++--------
drivers/nvme/host/multipath.c | 3 +--
include/trace/events/block.h | 8 +++-----
kernel/trace/blktrace.c | 14 +++++---------
11 files changed, 28 insertions(+), 42 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index cb24654983e1e4..96e5fcd7f071b6 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -758,7 +758,7 @@ static inline int blk_partition_remap(struct bio *bio)
if (bio_check_eod(bio, bdev_nr_sectors(p)))
goto out;
bio->bi_iter.bi_sector += p->bd_start_sect;
- trace_block_bio_remap(bio->bi_disk->queue, bio, p->bd_dev,
+ trace_block_bio_remap(bio, p->bd_dev,
bio->bi_iter.bi_sector -
p->bd_start_sect);
}
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 9a5bd90779c7c4..5181907dc59537 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1276,8 +1276,7 @@ static blk_qc_t __map_bio(struct dm_target_io *tio)
break;
case DM_MAPIO_REMAPPED:
/* the bio has been remapped so dispatch it */
- trace_block_bio_remap(clone->bi_disk->queue, clone,
- bio_dev(io->orig_bio), sector);
+ trace_block_bio_remap(clone, bio_dev(io->orig_bio), sector);
ret = submit_bio_noacct(clone);
break;
case DM_MAPIO_KILL:
diff --git a/drivers/md/md-linear.c b/drivers/md/md-linear.c
index 98f1b4b2bdcef8..68cac7d1927823 100644
--- a/drivers/md/md-linear.c
+++ b/drivers/md/md-linear.c
@@ -257,8 +257,7 @@ static bool linear_make_request(struct mddev *mddev, struct bio *bio)
bio_endio(bio);
} else {
if (mddev->gendisk)
- trace_block_bio_remap(bio->bi_disk->queue,
- bio, disk_devt(mddev->gendisk),
+ trace_block_bio_remap(bio, disk_devt(mddev->gendisk),
bio_sector);
mddev_check_writesame(mddev, bio);
mddev_check_write_zeroes(mddev, bio);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0065736f05b428..c555be0a8dce78 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -8591,9 +8591,8 @@ void md_submit_discard_bio(struct mddev *mddev, struct md_rdev *rdev,
bio_chain(discard_bio, bio);
bio_clone_blkg_association(discard_bio, bio);
if (mddev->gendisk)
- trace_block_bio_remap(bdev_get_queue(rdev->bdev),
- discard_bio, disk_devt(mddev->gendisk),
- bio->bi_iter.bi_sector);
+ trace_block_bio_remap(discard_bio, disk_devt(mddev->gendisk),
+ bio->bi_iter.bi_sector);
submit_bio_noacct(discard_bio);
}
EXPORT_SYMBOL(md_submit_discard_bio);
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 6f44177593a552..e5d7411cba9b46 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -571,8 +571,8 @@ static bool raid0_make_request(struct mddev *mddev, struct bio *bio)
tmp_dev->data_offset;

if (mddev->gendisk)
- trace_block_bio_remap(bio->bi_disk->queue, bio,
- disk_devt(mddev->gendisk), bio_sector);
+ trace_block_bio_remap(bio, disk_devt(mddev->gendisk),
+ bio_sector);
mddev_check_writesame(mddev, bio);
mddev_check_write_zeroes(mddev, bio);
submit_bio_noacct(bio);
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 960d854c07f897..c0347997f6ff73 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1305,8 +1305,8 @@ static void raid1_read_request(struct mddev *mddev, struct bio *bio,
read_bio->bi_private = r1_bio;

if (mddev->gendisk)
- trace_block_bio_remap(read_bio->bi_disk->queue, read_bio,
- disk_devt(mddev->gendisk), r1_bio->sector);
+ trace_block_bio_remap(read_bio, disk_devt(mddev->gendisk),
+ r1_bio->sector);

submit_bio_noacct(read_bio);
}
@@ -1517,8 +1517,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio,
atomic_inc(&r1_bio->remaining);

if (mddev->gendisk)
- trace_block_bio_remap(mbio->bi_disk->queue,
- mbio, disk_devt(mddev->gendisk),
+ trace_block_bio_remap(mbio, disk_devt(mddev->gendisk),
r1_bio->sector);
/* flush_pending_writes() needs access to the rdev so...*/
mbio->bi_disk = (void *)conf->mirrors[i].rdev;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index b7bca6703df814..a6f99fa0b32cfc 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1200,8 +1200,7 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio,
read_bio->bi_private = r10_bio;

if (mddev->gendisk)
- trace_block_bio_remap(read_bio->bi_disk->queue,
- read_bio, disk_devt(mddev->gendisk),
+ trace_block_bio_remap(read_bio, disk_devt(mddev->gendisk),
r10_bio->sector);
submit_bio_noacct(read_bio);
return;
@@ -1250,8 +1249,7 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio,
mbio->bi_private = r10_bio;

if (conf->mddev->gendisk)
- trace_block_bio_remap(mbio->bi_disk->queue,
- mbio, disk_devt(conf->mddev->gendisk),
+ trace_block_bio_remap(mbio, disk_devt(conf->mddev->gendisk),
r10_bio->sector);
/* flush_pending_writes() needs access to the rdev so...*/
mbio->bi_disk = (void *)rdev;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 39343479ac2a94..3a90cc0e43ca8e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1222,9 +1222,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
set_bit(R5_DOUBLE_LOCKED, &sh->dev[i].flags);

if (conf->mddev->gendisk)
- trace_block_bio_remap(bi->bi_disk->queue,
- bi, disk_devt(conf->mddev->gendisk),
- sh->dev[i].sector);
+ trace_block_bio_remap(bi,
+ disk_devt(conf->mddev->gendisk),
+ sh->dev[i].sector);
if (should_defer && op_is_write(op))
bio_list_add(&pending_bios, bi);
else
@@ -1272,9 +1272,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
if (op == REQ_OP_DISCARD)
rbi->bi_vcnt = 0;
if (conf->mddev->gendisk)
- trace_block_bio_remap(rbi->bi_disk->queue,
- rbi, disk_devt(conf->mddev->gendisk),
- sh->dev[i].sector);
+ trace_block_bio_remap(rbi,
+ disk_devt(conf->mddev->gendisk),
+ sh->dev[i].sector);
if (should_defer && op_is_write(op))
bio_list_add(&pending_bios, rbi);
else
@@ -5468,8 +5468,7 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
spin_unlock_irq(&conf->device_lock);

if (mddev->gendisk)
- trace_block_bio_remap(align_bi->bi_disk->queue,
- align_bi, disk_devt(mddev->gendisk),
+ trace_block_bio_remap(align_bi, disk_devt(mddev->gendisk),
raid_bio->bi_iter.bi_sector);
submit_bio_noacct(align_bi);
return 1;
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 74896be40c1769..106cf5c44ee7ab 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -312,8 +312,7 @@ blk_qc_t nvme_ns_head_submit_bio(struct bio *bio)
if (likely(ns)) {
bio->bi_disk = ns->disk;
bio->bi_opf |= REQ_NVME_MPATH;
- trace_block_bio_remap(bio->bi_disk->queue, bio,
- disk_devt(ns->head->disk),
+ trace_block_bio_remap(bio, disk_devt(ns->head->disk),
bio->bi_iter.bi_sector);
ret = submit_bio_noacct(bio);
} else if (nvme_available_path(head)) {
diff --git a/include/trace/events/block.h b/include/trace/events/block.h
index b415e4cba84304..8fb89574d8677f 100644
--- a/include/trace/events/block.h
+++ b/include/trace/events/block.h
@@ -450,9 +450,8 @@ TRACE_EVENT(block_split,

/**
* block_bio_remap - map request for a logical device to the raw device
- * @q: queue holding the operation
* @bio: revised operation
- * @dev: device for the operation
+ * @dev: original device for the operation
* @from: original sector for the operation
*
* An operation for a logical device has been mapped to the
@@ -460,10 +459,9 @@ TRACE_EVENT(block_split,
*/
TRACE_EVENT(block_bio_remap,

- TP_PROTO(struct request_queue *q, struct bio *bio, dev_t dev,
- sector_t from),
+ TP_PROTO(struct bio *bio, dev_t dev, sector_t from),

- TP_ARGS(q, bio, dev, from),
+ TP_ARGS(bio, dev, from),

TP_STRUCT__entry(
__field( dev_t, dev )
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 3ca6d62114f461..405637144a0389 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -993,20 +993,16 @@ static void blk_add_trace_split(void *ignore, struct bio *bio, unsigned int pdu)
/**
* blk_add_trace_bio_remap - Add a trace for a bio-remap operation
* @ignore: trace callback data parameter (not used)
- * @q: queue the io is for
* @bio: the source bio
- * @dev: target device
+ * @dev: source device
* @from: source sector
*
- * Description:
- * Device mapper or raid target sometimes need to split a bio because
- * it spans a stripe (or similar). Add a trace for that action.
- *
+ * Called after a bio is remapped to a different device and/or sector.
**/
-static void blk_add_trace_bio_remap(void *ignore,
- struct request_queue *q, struct bio *bio,
- dev_t dev, sector_t from)
+static void blk_add_trace_bio_remap(void *ignore, struct bio *bio, dev_t dev,
+ sector_t from)
{
+ struct request_queue *q = bio->bi_disk->queue;
struct blk_trace *bt;
struct blk_io_trace_remap r;

--
2.29.2