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block: fix partial zone append completion handling in req_bio_endio()

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[ Upstream commit 748dc0b65e ]

Partial completions of zone append request is not allowed but if a zone
append completion indicates a number of completed bytes different from
the original BIO size, only the BIO status is set to error. This leads
to bio_advance() not setting the BIO size to 0 and thus to not call
bio_endio() at the end of req_bio_endio().

Make sure a partially completed zone append is failed and completed
immediately by forcing the completed number of bytes (nbytes) to be
equal to the BIO size, thus ensuring that bio_endio() is called.

Fixes: 297db73184 ("block: fix req_bio_endio append error handling")
Cc: stable@kernel.vger.org
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Link: https://lore.kernel.org/r/20240110092942.442334-1-dlemoal@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Damien Le Moal 2024-01-10 18:29:42 +09:00 committed by Greg Kroah-Hartman
parent 099e62b987
commit 669d3e521a
1 changed files with 7 additions and 2 deletions
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9
block/blk-mq.c
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@ -772,11 +772,16 @@ static void req_bio_endio(struct request *rq, struct bio *bio,
/*
* Partial zone append completions cannot be supported as the
* BIO fragments may end up not being written sequentially.
* For such case, force the completed nbytes to be equal to
* the BIO size so that bio_advance() sets the BIO remaining
* size to 0 and we end up calling bio_endio() before returning.
*/
if (bio->bi_iter.bi_size != nbytes)
if (bio->bi_iter.bi_size != nbytes) {
bio->bi_status = BLK_STS_IOERR;
else
nbytes = bio->bi_iter.bi_size;
} else {
bio->bi_iter.bi_sector = rq->__sector;
}
}
bio_advance(bio, nbytes);