diff options
| author | Kent Overstreet <kmo@daterainc.com> | 2013-10-11 15:45:43 -0700 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2013-11-23 22:33:51 -0800 |
| commit | 003b5c5719f159f4f4bf97511c4702a0638313dd (patch) | |
| tree | 1b3cac74e22ae5a87fdb6e3066f2d728913e6e0c /fs/bio.c | |
| parent | 458b76ed2f9517becb74dcc8eedd70d3068ea6e4 (diff) | |
| download | linux-003b5c5719f159f4f4bf97511c4702a0638313dd.tar.bz2 | |
block: Convert drivers to immutable biovecs
Now that we've got a mechanism for immutable biovecs -
bi_iter.bi_bvec_done - we need to convert drivers to use primitives that
respect it instead of using the bvec array directly.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: NeilBrown <neilb@suse.de>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Diffstat (limited to 'fs/bio.c')
| -rw-r--r-- | fs/bio.c | 14 |
1 files changed, 11 insertions, 3 deletions
@@ -525,8 +525,17 @@ EXPORT_SYMBOL(bio_phys_segments); */ void __bio_clone(struct bio *bio, struct bio *bio_src) { - memcpy(bio->bi_io_vec, bio_src->bi_io_vec, - bio_src->bi_max_vecs * sizeof(struct bio_vec)); + if (bio_is_rw(bio_src)) { + struct bio_vec bv; + struct bvec_iter iter; + + bio_for_each_segment(bv, bio_src, iter) + bio->bi_io_vec[bio->bi_vcnt++] = bv; + } else if (bio_has_data(bio_src)) { + memcpy(bio->bi_io_vec, bio_src->bi_io_vec, + bio_src->bi_max_vecs * sizeof(struct bio_vec)); + bio->bi_vcnt = bio_src->bi_vcnt; + } /* * most users will be overriding ->bi_bdev with a new target, @@ -535,7 +544,6 @@ void __bio_clone(struct bio *bio, struct bio *bio_src) bio->bi_bdev = bio_src->bi_bdev; bio->bi_flags |= 1 << BIO_CLONED; bio->bi_rw = bio_src->bi_rw; - bio->bi_vcnt = bio_src->bi_vcnt; bio->bi_iter = bio_src->bi_iter; } EXPORT_SYMBOL(__bio_clone); |