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Message-Id: <1346876849-15820-9-git-send-email-koverstreet@google.com>
Date: Wed, 5 Sep 2012 13:27:29 -0700
From: Kent Overstreet <koverstreet@...gle.com>
To: linux-bcache@...r.kernel.org, linux-kernel@...r.kernel.org,
dm-devel@...hat.com
Cc: tj@...nel.org, vgoyal@...hat.com,
Kent Overstreet <koverstreet@...gle.com>,
Jens Axboe <axboe@...nel.dk>, NeilBrown <neilb@...e.de>,
Alasdair Kergon <agk@...hat.com>,
Boaz Harrosh <bharrosh@...asas.com>,
Jeff Garzik <jeff@...zik.org>
Subject: [PATCH v8 8/8] block: Add bio_clone_bioset(), bio_clone_kmalloc()
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 <koverstreet@...gle.com>
CC: Jens Axboe <axboe@...nel.dk>
CC: NeilBrown <neilb@...e.de>
CC: Alasdair Kergon <agk@...hat.com>
CC: Boaz Harrosh <bharrosh@...asas.com>
CC: Jeff Garzik <jeff@...zik.org>
Acked-by: Jeff Garzik <jgarzik@...hat.com>
---
block/blk-core.c | 8 +-------
drivers/block/osdblk.c | 3 +--
drivers/md/dm-crypt.c | 7 +------
drivers/md/dm.c | 4 ++--
drivers/md/md.c | 20 +-------------------
fs/bio.c | 11 +++++++----
fs/exofs/ore.c | 5 ++---
include/linux/bio.h | 17 ++++++++++++++---
8 files changed, 29 insertions(+), 46 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index b776cc9..82aab28 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -2781,16 +2781,10 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
blk_rq_init(NULL, rq);
__rq_for_each_bio(bio_src, rq_src) {
- bio = bio_alloc_bioset(gfp_mask, bio_src->bi_max_vecs, bs);
+ bio = bio_clone_bioset(bio_src, gfp_mask, bs);
if (!bio)
goto free_and_out;
- __bio_clone(bio, bio_src);
-
- if (bio_integrity(bio_src) &&
- bio_integrity_clone(bio, bio_src, gfp_mask))
- goto free_and_out;
-
if (bio_ctr && bio_ctr(bio, bio_src, data))
goto free_and_out;
diff --git a/drivers/block/osdblk.c b/drivers/block/osdblk.c
index 87311eb..1bbc681 100644
--- a/drivers/block/osdblk.c
+++ b/drivers/block/osdblk.c
@@ -266,11 +266,10 @@ static struct bio *bio_chain_clone(struct bio *old_chain, gfp_t gfpmask)
struct bio *tmp, *new_chain = NULL, *tail = NULL;
while (old_chain) {
- tmp = bio_kmalloc(gfpmask, old_chain->bi_max_vecs);
+ tmp = bio_clone_kmalloc(old_chain, gfpmask);
if (!tmp)
goto err_out;
- __bio_clone(tmp, old_chain);
tmp->bi_bdev = NULL;
gfpmask &= ~__GFP_WAIT;
tmp->bi_next = NULL;
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 3c0acba..bbf459b 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -979,19 +979,14 @@ static int kcryptd_io_read(struct dm_crypt_io *io, gfp_t gfp)
* copy the required bvecs because we need the original
* one in order to decrypt the whole bio data *afterwards*.
*/
- clone = bio_alloc_bioset(gfp, bio_segments(base_bio), cc->bs);
+ clone = bio_clone_bioset(base_bio, gfp, cc->bs);
if (!clone)
return 1;
crypt_inc_pending(io);
clone_init(io, clone);
- clone->bi_idx = 0;
- clone->bi_vcnt = bio_segments(base_bio);
- clone->bi_size = base_bio->bi_size;
clone->bi_sector = cc->start + io->sector;
- memcpy(clone->bi_io_vec, bio_iovec(base_bio),
- sizeof(struct bio_vec) * clone->bi_vcnt);
generic_make_request(clone);
return 0;
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index f2eb730..41afc66 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1129,8 +1129,8 @@ static void __issue_target_request(struct clone_info *ci, struct dm_target *ti,
* ci->bio->bi_max_vecs is BIO_INLINE_VECS anyway, for both flush
* and discard, so no need for concern about wasted bvec allocations.
*/
- clone = bio_alloc_bioset(GFP_NOIO, ci->bio->bi_max_vecs, ci->md->bs);
- __bio_clone(clone, ci->bio);
+ clone = bio_clone_bioset(ci->bio, GFP_NOIO, ci->md->bs);
+
if (len) {
clone->bi_sector = ci->sector;
clone->bi_size = to_bytes(len);
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 457ca84..7a2b079 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -173,28 +173,10 @@ EXPORT_SYMBOL_GPL(bio_alloc_mddev);
struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask,
struct mddev *mddev)
{
- struct bio *b;
-
if (!mddev || !mddev->bio_set)
return bio_clone(bio, gfp_mask);
- b = bio_alloc_bioset(gfp_mask, bio->bi_max_vecs, mddev->bio_set);
- if (!b)
- return NULL;
-
- __bio_clone(b, bio);
- if (bio_integrity(bio)) {
- int ret;
-
- ret = bio_integrity_clone(b, bio, gfp_mask);
-
- if (ret < 0) {
- bio_put(b);
- return NULL;
- }
- }
-
- return b;
+ return bio_clone_bioset(bio, gfp_mask, mddev->bio_set);
}
EXPORT_SYMBOL_GPL(bio_clone_mddev);
diff --git a/fs/bio.c b/fs/bio.c
index 357a3af..f335514 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -428,16 +428,19 @@ 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;
@@ -456,7 +459,7 @@ 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
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
index 1585db1..f936cb5 100644
--- a/fs/exofs/ore.c
+++ b/fs/exofs/ore.c
@@ -814,8 +814,8 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
struct bio *bio;
if (per_dev != master_dev) {
- bio = bio_kmalloc(GFP_KERNEL,
- master_dev->bio->bi_max_vecs);
+ bio = bio_clone_kmalloc(master_dev->bio,
+ GFP_KERNEL);
if (unlikely(!bio)) {
ORE_DBGMSG(
"Failed to allocate BIO size=%u\n",
@@ -824,7 +824,6 @@ static int _write_mirror(struct ore_io_state *ios, int cur_comp)
goto out;
}
- __bio_clone(bio, master_dev->bio);
bio->bi_bdev = NULL;
bio->bi_next = NULL;
per_dev->offset = master_dev->offset;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index fbe35b1..52b9cbc 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -215,6 +215,9 @@ extern void bioset_free(struct bio_set *);
extern struct bio *bio_alloc_bioset(gfp_t, int, struct bio_set *);
extern void bio_put(struct bio *);
+extern void __bio_clone(struct bio *, struct bio *);
+extern struct bio *bio_clone_bioset(struct bio *, gfp_t, struct bio_set *bs);
+
extern struct bio_set *fs_bio_set;
static inline struct bio *bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs)
@@ -222,18 +225,26 @@ static inline struct bio *bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs)
return bio_alloc_bioset(gfp_mask, nr_iovecs, fs_bio_set);
}
+static inline struct bio *bio_clone(struct bio *bio, gfp_t gfp_mask)
+{
+ return bio_clone_bioset(bio, gfp_mask, fs_bio_set);
+}
+
static inline struct bio *bio_kmalloc(gfp_t gfp_mask, unsigned int nr_iovecs)
{
return bio_alloc_bioset(gfp_mask, nr_iovecs, NULL);
}
+static inline struct bio *bio_clone_kmalloc(struct bio *bio, gfp_t gfp_mask)
+{
+ return bio_clone_bioset(bio, gfp_mask, NULL);
+
+}
+
extern void bio_endio(struct bio *, int);
struct request_queue;
extern int bio_phys_segments(struct request_queue *, struct bio *);
-extern void __bio_clone(struct bio *, struct bio *);
-extern struct bio *bio_clone(struct bio *, gfp_t);
-
extern void bio_init(struct bio *);
extern void bio_reset(struct bio *);
--
1.7.12
--
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