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| author | Jens Axboe <axboe@kernel.dk> | 2018-06-07 14:42:05 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-06-08 07:03:35 -0600 |
| commit | 28e89fd914a22e8a64f05ae2f0048b06165f371b (patch) | |
| tree | c94dfa5cf876cb8063b6f430ced9030c35a8c59b | |
| parent | c04fa44b76b8d9d4f6b577030aa0cbb20359c428 (diff) | |
| download | linux-28e89fd914a22e8a64f05ae2f0048b06165f371b.tar.gz linux-28e89fd914a22e8a64f05ae2f0048b06165f371b.tar.bz2 linux-28e89fd914a22e8a64f05ae2f0048b06165f371b.zip | |
block: add bioset_init_from_src() helper
Add a helper that allows a caller to initialize a new bio_set,
using the settings from an existing bio_set.
Reported-by: Venkat R.B <vrbagal1@linux.vnet.ibm.com>
Tested-by: Venkat R.B <vrbagal1@linux.vnet.ibm.com>
Tested-by: Li Wang <liwang@redhat.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/bio.c | 18 | ||||
| -rw-r--r-- | include/linux/bio.h | 1 |
2 files changed, 19 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c index 595663e0281a..bf516d873ce9 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1967,6 +1967,24 @@ bad: } EXPORT_SYMBOL(bioset_init); +/* + * Initialize and setup a new bio_set, based on the settings from + * another bio_set. + */ +int bioset_init_from_src(struct bio_set *bs, struct bio_set *src) +{ + int flags; + + flags = 0; + if (src->bvec_pool.min_nr) + flags |= BIOSET_NEED_BVECS; + if (src->rescue_workqueue) + flags |= BIOSET_NEED_RESCUER; + + return bioset_init(bs, src->bio_pool.min_nr, src->front_pad, flags); +} +EXPORT_SYMBOL(bioset_init_from_src); + #ifdef CONFIG_BLK_CGROUP /** diff --git a/include/linux/bio.h b/include/linux/bio.h index 810a8bee8f85..84abd1706dcb 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -417,6 +417,7 @@ enum { extern int bioset_init(struct bio_set *, unsigned int, unsigned int, int flags); extern void bioset_exit(struct bio_set *); extern int biovec_init_pool(mempool_t *pool, int pool_entries); +extern int bioset_init_from_src(struct bio_set *bs, struct bio_set *src); extern struct bio *bio_alloc_bioset(gfp_t, unsigned int, struct bio_set *); extern void bio_put(struct bio *); |