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btrfs: move last_flush_error to write_dev_flush and wait_dev_flush

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We parallelize the flush command across devices using our own code,
write_dev_flush() sends the flush command to each device and
wait_dev_flush() waits for the flush to complete on all devices. Errors
from each device are recorded at device->last_flush_error and reset to
BLK_STS_OK in write_dev_flush() and to the error, if any, in
wait_dev_flush(). These functions are called from barrier_all_devices().

This patch consolidates the use of device->last_flush_error in
write_dev_flush() and wait_dev_flush() to remove it from
barrier_all_devices().

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2023-03-27 17:53:07 +08:00 committed by David Sterba
parent b7b1167c36
commit bfd3ea946f
1 changed files with 8 additions and 6 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

14
fs/btrfs/disk-io.c
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@ -4086,6 +4086,8 @@ static void write_dev_flush(struct btrfs_device *device)
{
struct bio *bio = &device->flush_bio;
device->last_flush_error = BLK_STS_OK;
#ifndef CONFIG_BTRFS_FS_CHECK_INTEGRITY
/*
* When a disk has write caching disabled, we skip submission of a bio
@ -4125,6 +4127,11 @@ static blk_status_t wait_dev_flush(struct btrfs_device *device)
clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state);
wait_for_completion_io(&device->flush_wait);
if (bio->bi_status) {
device->last_flush_error = bio->bi_status;
btrfs_dev_stat_inc_and_print(device, BTRFS_DEV_STAT_FLUSH_ERRS);
}
return bio->bi_status;
}
@ -4159,7 +4166,6 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
continue;
write_dev_flush(dev);
dev->last_flush_error = BLK_STS_OK;
}
/* wait for all the barriers */
@ -4175,12 +4181,8 @@ static int barrier_all_devices(struct btrfs_fs_info *info)
continue;
ret = wait_dev_flush(dev);
if (ret) {
dev->last_flush_error = ret;
btrfs_dev_stat_inc_and_print(dev,
BTRFS_DEV_STAT_FLUSH_ERRS);
if (ret)
errors_wait++;
}
}
if (errors_wait) {