Commit 528ec5ab authored by Mike Christie's avatar Mike Christie Committed by Jens Axboe
Browse files

dm: pass dm stats data dir instead of bi_rw

It looks like dm stats cares about the data direction
(READ vs WRITE) and does not need the bio/request flags.
are currently always set with REQ_WRITE, so the extra check for
REQ_DISCARD in dm_stats_account_io is not needed.

This patch has it use the bio and request data_dir helpers
instead of accessing the bi_rw/cmd_flags directly. This makes
the next patches that remove the operation from the cmd_flags
and bi_rw easier, because we will no longer have the REQ_WRITE
bit set for operations like discards.
Signed-off-by: default avatarMike Christie <>
Reviewed-by: default avatarChristoph Hellwig <>
Reviewed-by: default avatarHannes Reinecke <>
Signed-off-by: default avatarJens Axboe <>
parent 162b99e3
......@@ -514,11 +514,10 @@ static void dm_stat_round(struct dm_stat *s, struct dm_stat_shared *shared,
static void dm_stat_for_entry(struct dm_stat *s, size_t entry,
unsigned long bi_rw, sector_t len,
int idx, sector_t len,
struct dm_stats_aux *stats_aux, bool end,
unsigned long duration_jiffies)
unsigned long idx = bi_rw & REQ_WRITE;
struct dm_stat_shared *shared = &s->stat_shared[entry];
struct dm_stat_percpu *p;
......@@ -584,7 +583,7 @@ static void dm_stat_for_entry(struct dm_stat *s, size_t entry,
static void __dm_stat_bio(struct dm_stat *s, unsigned long bi_rw,
static void __dm_stat_bio(struct dm_stat *s, int bi_rw,
sector_t bi_sector, sector_t end_sector,
bool end, unsigned long duration_jiffies,
struct dm_stats_aux *stats_aux)
......@@ -645,8 +644,8 @@ void dm_stats_account_io(struct dm_stats *stats, unsigned long bi_rw,
last = raw_cpu_ptr(stats->last);
stats_aux->merged =
(bi_sector == (ACCESS_ONCE(last->last_sector) &&
((bi_rw & (REQ_WRITE | REQ_DISCARD)) ==
(ACCESS_ONCE(last->last_rw) & (REQ_WRITE | REQ_DISCARD)))
((bi_rw == WRITE) ==
(ACCESS_ONCE(last->last_rw) == WRITE))
ACCESS_ONCE(last->last_sector) = end_sector;
ACCESS_ONCE(last->last_rw) = bi_rw;
......@@ -723,8 +723,9 @@ static void start_io_acct(struct dm_io *io)
if (unlikely(dm_stats_used(&md->stats)))
dm_stats_account_io(&md->stats, bio->bi_rw, bio->bi_iter.bi_sector,
bio_sectors(bio), false, 0, &io->stats_aux);
dm_stats_account_io(&md->stats, bio_data_dir(bio),
bio->bi_iter.bi_sector, bio_sectors(bio),
false, 0, &io->stats_aux);
static void end_io_acct(struct dm_io *io)
......@@ -738,8 +739,9 @@ static void end_io_acct(struct dm_io *io)
generic_end_io_acct(rw, &dm_disk(md)->part0, io->start_time);
if (unlikely(dm_stats_used(&md->stats)))
dm_stats_account_io(&md->stats, bio->bi_rw, bio->bi_iter.bi_sector,
bio_sectors(bio), true, duration, &io->stats_aux);
dm_stats_account_io(&md->stats, bio_data_dir(bio),
bio->bi_iter.bi_sector, bio_sectors(bio),
true, duration, &io->stats_aux);
* After this is decremented the bio must not be touched if it is
......@@ -1121,9 +1123,9 @@ static void rq_end_stats(struct mapped_device *md, struct request *orig)
if (unlikely(dm_stats_used(&md->stats))) {
struct dm_rq_target_io *tio = tio_from_request(orig);
tio->duration_jiffies = jiffies - tio->duration_jiffies;
dm_stats_account_io(&md->stats, orig->cmd_flags, blk_rq_pos(orig),
tio->n_sectors, true, tio->duration_jiffies,
dm_stats_account_io(&md->stats, rq_data_dir(orig),
blk_rq_pos(orig), tio->n_sectors, true,
tio->duration_jiffies, &tio->stats_aux);
......@@ -2082,8 +2084,9 @@ static void dm_start_request(struct mapped_device *md, struct request *orig)
struct dm_rq_target_io *tio = tio_from_request(orig);
tio->duration_jiffies = jiffies;
tio->n_sectors = blk_rq_sectors(orig);
dm_stats_account_io(&md->stats, orig->cmd_flags, blk_rq_pos(orig),
tio->n_sectors, false, 0, &tio->stats_aux);
dm_stats_account_io(&md->stats, rq_data_dir(orig),
blk_rq_pos(orig), tio->n_sectors, false, 0,
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