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bcache: add io error counting in write_bdev_super_endio()

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When backing device super block is written by bch_write_bdev_super(),
the bio complete callback write_bdev_super_endio() simply ignores I/O
status. Indeed such write request also contribute to backing device
health status if the request failed.

This patch checkes bio->bi_status in write_bdev_super_endio(), if there
is error, bch_count_backing_io_errors() will be called to count an I/O
error to dc->io_errors.

Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Coly Li
2019-06-28 19:59:30 +08:00
committed by Jens Axboe
parent 578df99b1b
commit 08ec1e6282
1 changed files with 3 additions and 1 deletions
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4
drivers/md/bcache/super.c
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@@ -197,7 +197,9 @@ static const char *read_super(struct cache_sb *sb, struct block_device *bdev,
static void write_bdev_super_endio(struct bio *bio)
{
struct cached_dev *dc = bio->bi_private;
/* XXX: error checking */
if (bio->bi_status)
bch_count_backing_io_errors(dc, bio);
closure_put(&dc->sb_write);
}