diff options
| author | Christoph Hellwig <hch@lst.de> | 2024-08-26 19:37:54 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-08-29 04:32:32 -0600 |
| commit | b35243a447b9fe6457fa8e1352152b818436ba5a (patch) | |
| tree | f9beca92729368456e39512aa7c884dd7f12886c /block/blk-mq.c | |
| parent | f6f84be089c9d6f5e3e1228c389e51c7ae7bad1a (diff) | |
block: rework bio splitting
The current setup with bio_may_exceed_limit and __bio_split_to_limits
is a bit of a mess.
Change it so that __bio_split_to_limits does all the work and is just
a variant of bio_split_to_limits that returns nr_segs. This is done
by inlining it and instead have the various bio_split_* helpers directly
submit the potentially split bios.
To support btrfs, the rw version has a lower level helper split out
that just returns the offset to split. This turns out to nicely clean
up the btrfs flow as well.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David Sterba <dsterba@suse.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Tested-by: Hans Holmberg <hans.holmberg@wdc.com>
Reviewed-by: Hans Holmberg <hans.holmberg@wdc.com>
Link: https://lore.kernel.org/r/20240826173820.1690925-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index e3c3c0c21b55..36abbaefe387 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2939,7 +2939,7 @@ void blk_mq_submit_bio(struct bio *bio) struct blk_plug *plug = current->plug; const int is_sync = op_is_sync(bio->bi_opf); struct blk_mq_hw_ctx *hctx; - unsigned int nr_segs = 1; + unsigned int nr_segs; struct request *rq; blk_status_t ret; @@ -2981,11 +2981,10 @@ void blk_mq_submit_bio(struct bio *bio) goto queue_exit; } - if (unlikely(bio_may_exceed_limits(bio, &q->limits))) { - bio = __bio_split_to_limits(bio, &q->limits, &nr_segs); - if (!bio) - goto queue_exit; - } + bio = __bio_split_to_limits(bio, &q->limits, &nr_segs); + if (!bio) + goto queue_exit; + if (!bio_integrity_prep(bio)) goto queue_exit; |