diff options
| author | Christoph Hellwig <hch@infradead.org> | 2022-11-02 00:09:03 -0700 |
|---|---|---|
| committer | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2023-01-14 07:32:41 +0900 |
| commit | b4a6bb3a67aa0c37b2b6cd47efc326eb455de674 (patch) | |
| tree | 86e5b7f91aefb790856cf679b5b541b387156fa6 | |
| parent | 002c487119f2c740bad0a3acbd356d4a57d237c3 (diff) | |
block: add a sanity check for non-write flush/fua bios
Check that the PREFUSH and FUA flags are only set on write bios,
given that the flush state machine expects that.
[Damien] The check is also extended to REQ_OP_ZONE_APPEND operations as
these are data write operations used by btrfs and zonefs and may also
have the REQ_FUA bit set.
Reported-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
| -rw-r--r-- | block/blk-core.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 9321767470dc..c644aac498ef 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -744,12 +744,16 @@ void submit_bio_noacct(struct bio *bio) * Filter flush bio's early so that bio based drivers without flush * support don't have to worry about them. */ - if (op_is_flush(bio->bi_opf) && - !test_bit(QUEUE_FLAG_WC, &q->queue_flags)) { - bio->bi_opf &= ~(REQ_PREFLUSH | REQ_FUA); - if (!bio_sectors(bio)) { - status = BLK_STS_OK; + if (op_is_flush(bio->bi_opf)) { + if (WARN_ON_ONCE(bio_op(bio) != REQ_OP_WRITE && + bio_op(bio) != REQ_OP_ZONE_APPEND)) goto end_io; + if (!test_bit(QUEUE_FLAG_WC, &q->queue_flags)) { + bio->bi_opf &= ~(REQ_PREFLUSH | REQ_FUA); + if (!bio_sectors(bio)) { + status = BLK_STS_OK; + goto end_io; + } } } |