From: Ming Lei <ming.lei@redhat.com>
Date: Sun, 17 Apr 2022 22:27:13 -0400
Subject: [PATCH] block: change exported IO accounting interface from gendisk
to bdev
Git-commit: 5f0614a55ecebdf55f1a17db0b5f6b787ed009f1
Patch-mainline: v5.19-rc1
References: jsc#PED-1183
Export IO accounting interfaces in terms of block_device now that
gendisk has become more internal to block core.
Rename __part_{start,end}_io_acct's first argument from part to bdev.
Rename __part_{start,end}_io_acct to bdev_{start,end}_io_acct and
export them. Remove disk_{start,end}_io_acct and update caller (zram)
to use bdev_{start,end}_io_acct.
DM can now be updated to use bdev_{start,end}_io_acct.
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Link: https://lore.kernel.org/r/20220418022733.56168-2-snitzer@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/blk-core.c | 52 ++++++++++++++---------------------
drivers/block/zram/zram_drv.c | 5 ++--
include/linux/blkdev.h | 7 +++--
3 files changed, 27 insertions(+), 37 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index ee18b6a699bd..f305cb66c72a 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1022,21 +1022,22 @@ void update_io_ticks(struct block_device *part, unsigned long now, bool end)
}
}
-static unsigned long __part_start_io_acct(struct block_device *part,
- unsigned int sectors, unsigned int op,
- unsigned long start_time)
+unsigned long bdev_start_io_acct(struct block_device *bdev,
+ unsigned int sectors, unsigned int op,
+ unsigned long start_time)
{
const int sgrp = op_stat_group(op);
part_stat_lock();
- update_io_ticks(part, start_time, false);
- part_stat_inc(part, ios[sgrp]);
- part_stat_add(part, sectors[sgrp], sectors);
- part_stat_local_inc(part, in_flight[op_is_write(op)]);
+ update_io_ticks(bdev, start_time, false);
+ part_stat_inc(bdev, ios[sgrp]);
+ part_stat_add(bdev, sectors[sgrp], sectors);
+ part_stat_local_inc(bdev, in_flight[op_is_write(op)]);
part_stat_unlock();
return start_time;
}
+EXPORT_SYMBOL(bdev_start_io_acct);
/**
* bio_start_io_acct_time - start I/O accounting for bio based drivers
@@ -1045,8 +1046,8 @@ static unsigned long __part_start_io_acct(struct block_device *part,
*/
void bio_start_io_acct_time(struct bio *bio, unsigned long start_time)
{
- __part_start_io_acct(bio->bi_bdev, bio_sectors(bio),
- bio_op(bio), start_time);
+ bdev_start_io_acct(bio->bi_bdev, bio_sectors(bio),
+ bio_op(bio), start_time);
}
EXPORT_SYMBOL_GPL(bio_start_io_acct_time);
@@ -1058,46 +1059,33 @@ EXPORT_SYMBOL_GPL(bio_start_io_acct_time);
*/
unsigned long bio_start_io_acct(struct bio *bio)
{
- return __part_start_io_acct(bio->bi_bdev, bio_sectors(bio),
- bio_op(bio), jiffies);
+ return bdev_start_io_acct(bio->bi_bdev, bio_sectors(bio),
+ bio_op(bio), jiffies);
}
EXPORT_SYMBOL_GPL(bio_start_io_acct);
-unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
- unsigned int op)
-{
- return __part_start_io_acct(disk->part0, sectors, op, jiffies);
-}
-EXPORT_SYMBOL(disk_start_io_acct);
-
-static void __part_end_io_acct(struct block_device *part, unsigned int op,
- unsigned long start_time)
+void bdev_end_io_acct(struct block_device *bdev, unsigned int op,
+ unsigned long start_time)
{
const int sgrp = op_stat_group(op);
unsigned long now = READ_ONCE(jiffies);
unsigned long duration = now - start_time;
part_stat_lock();
- update_io_ticks(part, now, true);
- part_stat_add(part, nsecs[sgrp], jiffies_to_nsecs(duration));
- part_stat_local_dec(part, in_flight[op_is_write(op)]);
+ update_io_ticks(bdev, now, true);
+ part_stat_add(bdev, nsecs[sgrp], jiffies_to_nsecs(duration));
+ part_stat_local_dec(bdev, in_flight[op_is_write(op)]);
part_stat_unlock();
}
+EXPORT_SYMBOL(bdev_end_io_acct);
void bio_end_io_acct_remapped(struct bio *bio, unsigned long start_time,
- struct block_device *orig_bdev)
+ struct block_device *orig_bdev)
{
- __part_end_io_acct(orig_bdev, bio_op(bio), start_time);
+ bdev_end_io_acct(orig_bdev, bio_op(bio), start_time);
}
EXPORT_SYMBOL_GPL(bio_end_io_acct_remapped);
-void disk_end_io_acct(struct gendisk *disk, unsigned int op,
- unsigned long start_time)
-{
- __part_end_io_acct(disk->part0, op, start_time);
-}
-EXPORT_SYMBOL(disk_end_io_acct);
-
/**
* blk_lld_busy - Check if underlying low-level drivers of a device are busy
* @q : the queue of the device being checked
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 59ff444bf6c7..1b277308d3ec 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1675,9 +1675,10 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
bv.bv_len = PAGE_SIZE;
bv.bv_offset = 0;
- start_time = disk_start_io_acct(bdev->bd_disk, SECTORS_PER_PAGE, op);
+ start_time = bdev_start_io_acct(bdev->bd_disk->part0,
+ SECTORS_PER_PAGE, op, jiffies);
ret = zram_bvec_rw(zram, &bv, index, offset, op, NULL);
- disk_end_io_acct(bdev->bd_disk, op, start_time);
+ bdev_end_io_acct(bdev->bd_disk->part0, op, start_time);
out:
/*
* If I/O fails, just return error(ie, non-zero) without
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c9b5925af5a3..34724b15813b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1463,9 +1463,10 @@ static inline void blk_wake_io_task(struct task_struct *waiter)
wake_up_process(waiter);
}
-unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
- unsigned int op);
-void disk_end_io_acct(struct gendisk *disk, unsigned int op,
+unsigned long bdev_start_io_acct(struct block_device *bdev,
+ unsigned int sectors, unsigned int op,
+ unsigned long start_time);
+void bdev_end_io_acct(struct block_device *bdev, unsigned int op,
unsigned long start_time);
void bio_start_io_acct_time(struct bio *bio, unsigned long start_time);
--
2.35.3