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block: Add bio_clone_bioset(), bio_clone_kmalloc()

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Previously, there was bio_clone() but it only allocated from the fs bio
set; as a result various users were open coding it and using
__bio_clone().

This changes bio_clone() to become bio_clone_bioset(), and then we add
bio_clone() and bio_clone_kmalloc() as wrappers around it, making use of
the functionality the last patch adedd.

This will also help in a later patch changing how bio cloning works.

Signed-off-by: Kent Overstreet <[email protected]>
CC: Jens Axboe <[email protected]>
CC: NeilBrown <[email protected]>
CC: Alasdair Kergon <[email protected]>
CC: Boaz Harrosh <[email protected]>
CC: Jeff Garzik <[email protected]>
Acked-by: Jeff Garzik <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Kent Overstreet 2012-09-06 15:35:02 -07:00 • committed by Jens Axboe
commit bf800ef181
8 changed files with 29 additions and 46 deletions
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11
fs/bio.c
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@ -438,16 +438,19 @@ void __bio_clone(struct bio *bio, struct bio *bio_src)
EXPORT_SYMBOL(__bio_clone);
/**
* bio_clone - clone a bio
* bio_clone_bioset - clone a bio
* @bio: bio to clone
* @gfp_mask: allocation priority
* @bs: bio_set to allocate from
*
* Like __bio_clone, only also allocates the returned bio
*/
struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
struct bio *bio_clone_bioset(struct bio *bio, gfp_t gfp_mask,
struct bio_set *bs)
{
struct bio *b = bio_alloc(gfp_mask, bio->bi_max_vecs);
struct bio *b;
b = bio_alloc_bioset(gfp_mask, bio->bi_max_vecs, bs);
if (!b)
return NULL;
@ -466,7 +469,7 @@ struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
return b;
}
EXPORT_SYMBOL(bio_clone);
EXPORT_SYMBOL(bio_clone_bioset);
/**
* bio_get_nr_vecs - return approx number of vecs