From: Kent Overstreet <kmo@daterainc.com>
To: axboe@kernel.dk
Cc: linux-kernel@vger.kernel.org, hch@infradead.org, tj@kernel.org,
nab@linux-iscsi.org, Kent Overstreet <kmo@daterainc.com>,
"Ed L. Cashin" <ecashin@coraid.com>,
Alasdair Kergon <agk@redhat.com>,
dm-devel@redhat.com,
"James E.J. Bottomley" <JBottomley@parallels.com>
Subject: [PATCH 06/23] block: Convert bio_iovec() to bvec_iter
Date: Tue, 29 Oct 2013 13:17:59 -0700 [thread overview]
Message-ID: <1383077896-4132-7-git-send-email-kmo@daterainc.com> (raw)
In-Reply-To: <1383077896-4132-1-git-send-email-kmo@daterainc.com>
For immutable biovecs, we'll be introducing a new bio_iovec() that uses
our new bvec iterator to construct a biovec, taking into account
bvec_iter->bi_bvec_done - this patch updates existing users for the new
usage.
Some of the existing users really do need a pointer into the bvec array
- those uses are all going to be removed, but we'll need the
functionality from immutable to remove them - so for now rename the
existing bio_iovec() -> __bio_iovec(), and it'll be removed in a couple
patches.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "Ed L. Cashin" <ecashin@coraid.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
---
drivers/block/aoe/aoecmd.c | 2 +-
drivers/md/bcache/io.c | 13 +++++++------
drivers/md/dm-verity.c | 2 +-
drivers/scsi/sd.c | 2 +-
fs/bio.c | 20 ++++++++++----------
include/linux/bio.h | 10 ++++++----
6 files changed, 26 insertions(+), 23 deletions(-)
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 877ba11..77c24ab 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -932,7 +932,7 @@ bufinit(struct buf *buf, struct request *rq, struct bio *bio)
buf->resid = bio->bi_iter.bi_size;
buf->sector = bio->bi_iter.bi_sector;
bio_pageinc(bio);
- buf->bv = bio_iovec(bio);
+ buf->bv = __bio_iovec(bio);
buf->bv_resid = buf->bv->bv_len;
WARN_ON(buf->bv_resid == 0);
}
diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
index cc4ba2d..dc44f06 100644
--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -22,11 +22,12 @@ static void bch_bi_idx_hack_endio(struct bio *bio, int error)
static void bch_generic_make_request_hack(struct bio *bio)
{
if (bio->bi_iter.bi_idx) {
+ int i;
+ struct bio_vec *bv;
struct bio *clone = bio_alloc(GFP_NOIO, bio_segments(bio));
- memcpy(clone->bi_io_vec,
- bio_iovec(bio),
- bio_segments(bio) * sizeof(struct bio_vec));
+ bio_for_each_segment(bv, bio, i)
+ clone->bi_io_vec[clone->bi_vcnt++] = *bv;
clone->bi_iter.bi_sector = bio->bi_iter.bi_sector;
clone->bi_bdev = bio->bi_bdev;
@@ -97,7 +98,7 @@ struct bio *bch_bio_split(struct bio *bio, int sectors,
if (!ret)
return NULL;
- memcpy(ret->bi_io_vec, bio_iovec(bio),
+ memcpy(ret->bi_io_vec, __bio_iovec(bio),
sizeof(struct bio_vec) * vcnt);
break;
@@ -106,7 +107,7 @@ struct bio *bch_bio_split(struct bio *bio, int sectors,
if (!ret)
return NULL;
- memcpy(ret->bi_io_vec, bio_iovec(bio),
+ memcpy(ret->bi_io_vec, __bio_iovec(bio),
sizeof(struct bio_vec) * vcnt);
ret->bi_io_vec[vcnt - 1].bv_len = nbytes;
@@ -182,7 +183,7 @@ static unsigned bch_bio_max_sectors(struct bio *bio)
ret = min(ret, queue_max_sectors(q));
WARN_ON(!ret);
- ret = max_t(int, ret, bio_iovec(bio)->bv_len >> 9);
+ ret = max_t(int, ret, bio_iovec(bio).bv_len >> 9);
return ret;
}
diff --git a/drivers/md/dm-verity.c b/drivers/md/dm-verity.c
index 132b315..5392135 100644
--- a/drivers/md/dm-verity.c
+++ b/drivers/md/dm-verity.c
@@ -524,7 +524,7 @@ static int verity_map(struct dm_target *ti, struct bio *bio)
io->io_vec = io->io_vec_inline;
else
io->io_vec = mempool_alloc(v->vec_mempool, GFP_NOIO);
- memcpy(io->io_vec, bio_iovec(bio),
+ memcpy(io->io_vec, __bio_iovec(bio),
io->io_vec_size * sizeof(struct bio_vec));
verity_submit_prefetch(v, io);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index e62d17d..b79eb39 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -800,7 +800,7 @@ static int sd_setup_write_same_cmnd(struct scsi_device *sdp, struct request *rq)
if (sdkp->device->no_write_same)
return BLKPREP_KILL;
- BUG_ON(bio_offset(bio) || bio_iovec(bio)->bv_len != sdp->sector_size);
+ BUG_ON(bio_offset(bio) || bio_iovec(bio).bv_len != sdp->sector_size);
sector >>= ilog2(sdp->sector_size) - 9;
nr_sectors >>= ilog2(sdp->sector_size) - 9;
diff --git a/fs/bio.c b/fs/bio.c
index 77ab430..26f1cc5 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -821,12 +821,12 @@ void bio_advance(struct bio *bio, unsigned bytes)
break;
}
- if (bytes >= bio_iovec(bio)->bv_len) {
- bytes -= bio_iovec(bio)->bv_len;
+ if (bytes >= bio_iovec(bio).bv_len) {
+ bytes -= bio_iovec(bio).bv_len;
bio->bi_iter.bi_idx++;
} else {
- bio_iovec(bio)->bv_len -= bytes;
- bio_iovec(bio)->bv_offset += bytes;
+ bio_iovec(bio).bv_len -= bytes;
+ bio_iovec(bio).bv_offset += bytes;
bytes = 0;
}
}
@@ -879,8 +879,8 @@ void bio_copy_data(struct bio *dst, struct bio *src)
unsigned src_offset, dst_offset, bytes;
void *src_p, *dst_p;
- src_bv = bio_iovec(src);
- dst_bv = bio_iovec(dst);
+ src_bv = __bio_iovec(src);
+ dst_bv = __bio_iovec(dst);
src_offset = src_bv->bv_offset;
dst_offset = dst_bv->bv_offset;
@@ -893,7 +893,7 @@ void bio_copy_data(struct bio *dst, struct bio *src)
if (!src)
break;
- src_bv = bio_iovec(src);
+ src_bv = __bio_iovec(src);
}
src_offset = src_bv->bv_offset;
@@ -906,7 +906,7 @@ void bio_copy_data(struct bio *dst, struct bio *src)
if (!dst)
break;
- dst_bv = bio_iovec(dst);
+ dst_bv = __bio_iovec(dst);
}
dst_offset = dst_bv->bv_offset;
@@ -1776,8 +1776,8 @@ struct bio_pair *bio_split(struct bio *bi, int first_sectors)
bp->bio1.bi_iter.bi_size = first_sectors << 9;
if (bi->bi_vcnt != 0) {
- bp->bv1 = *bio_iovec(bi);
- bp->bv2 = *bio_iovec(bi);
+ bp->bv1 = bio_iovec(bi);
+ bp->bv2 = bio_iovec(bi);
if (bio_is_rw(bi)) {
bp->bv2.bv_offset += first_sectors << 9;
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 5f440f0..58d5647 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -62,9 +62,11 @@
* on highmem page vectors
*/
#define bio_iovec_idx(bio, idx) (&((bio)->bi_io_vec[(idx)]))
-#define bio_iovec(bio) bio_iovec_idx((bio), (bio)->bi_iter.bi_idx)
-#define bio_page(bio) bio_iovec((bio))->bv_page
-#define bio_offset(bio) bio_iovec((bio))->bv_offset
+#define __bio_iovec(bio) bio_iovec_idx((bio), (bio)->bi_iter.bi_idx)
+#define bio_iovec(bio) (*__bio_iovec(bio))
+
+#define bio_page(bio) (bio_iovec((bio)).bv_page)
+#define bio_offset(bio) (bio_iovec((bio)).bv_offset)
#define bio_segments(bio) ((bio)->bi_vcnt - (bio)->bi_iter.bi_idx)
#define bio_sectors(bio) ((bio)->bi_iter.bi_size >> 9)
#define bio_end_sector(bio) ((bio)->bi_iter.bi_sector + bio_sectors((bio)))
@@ -72,7 +74,7 @@
static inline unsigned int bio_cur_bytes(struct bio *bio)
{
if (bio->bi_vcnt)
- return bio_iovec(bio)->bv_len;
+ return bio_iovec(bio).bv_len;
else /* dataless requests such as discard */
return bio->bi_iter.bi_size;
}
--
1.8.4.rc3
next prev parent reply other threads:[~2013-10-29 20:18 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-29 20:17 [PATCH] Immutable biovecs Kent Overstreet
2013-10-29 20:17 ` [PATCH 01/23] block: Use rw_copy_check_uvector() Kent Overstreet
2013-10-29 20:17 ` [PATCH 02/23] block: Consolidate duplicated bio_trim() implementations Kent Overstreet
2013-10-29 20:17 ` [PATCH 03/23] bcache: Kill unaligned bvec hack Kent Overstreet
2013-10-29 20:17 ` [PATCH 05/23] dm: Use bvec_iter for dm_bio_record() Kent Overstreet
2013-10-29 20:17 ` Kent Overstreet [this message]
2013-10-29 20:18 ` [PATCH 08/23] block: Immutable bio vecs Kent Overstreet
2013-10-29 20:18 ` [PATCH 09/23] block: Convert bio_copy_data() to bvec_iter Kent Overstreet
2013-10-29 20:18 ` [PATCH 10/23] bio-integrity: Convert " Kent Overstreet
2013-10-29 20:18 ` [PATCH 11/23] block: Kill bio_segments()/bi_vcnt usage Kent Overstreet
2013-10-29 20:18 ` [PATCH 12/23] block: Convert drivers to immutable biovecs Kent Overstreet
2013-10-29 20:18 ` [PATCH 13/23] aoe: Convert " Kent Overstreet
2013-10-29 20:18 ` [PATCH 14/23] ceph: " Kent Overstreet
2013-10-29 20:18 ` [PATCH 15/23] block: Kill bio_iovec_idx(), __bio_iovec() Kent Overstreet
2013-10-29 20:18 ` [PATCH 16/23] rbd: Refactor bio cloning, don't clone biovecs Kent Overstreet
2013-10-29 20:18 ` [PATCH 17/23] dm: Refactor for new bio cloning/splitting Kent Overstreet
2013-10-29 23:04 ` Mike Snitzer
2013-10-30 0:09 ` Mike Snitzer
2013-10-30 0:19 ` Kent Overstreet
2013-10-30 0:29 ` Mike Snitzer
2013-10-31 14:05 ` Jens Axboe
2013-10-29 20:18 ` [PATCH 18/23] block: Remove bi_idx hacks Kent Overstreet
2013-10-29 20:18 ` [PATCH 19/23] block: Generic bio chaining Kent Overstreet
2013-10-29 20:18 ` [PATCH 20/23] block: Rename bio_split() -> bio_pair_split() Kent Overstreet
2013-10-29 20:18 ` [PATCH 21/23] block: Introduce new bio_split() Kent Overstreet
2013-10-29 20:18 ` [PATCH 22/23] block: Kill bio_pair_split() Kent Overstreet
2013-10-29 20:18 ` [PATCH 23/23] block: Don't save/copy bvec array anymore, share when cloning Kent Overstreet
2013-10-29 20:36 ` [PATCH] Immutable biovecs Jens Axboe
2013-10-30 0:06 ` Kent Overstreet
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