[PATCH 07/22] block: Convert bio_for_each_segment() to bvec_iter
Kent Overstreet
kmo at daterainc.com
Thu Aug 8 07:54:16 EST 2013
More prep work for immutable biovecs - with immutable bvecs drivers
won't be able to use the biovec directly, they'll need to use helpers
that take into account bio->bi_iter.bi_bvec_done.
This updates callers for the new usage without changing the
implementation yet.
Signed-off-by: Kent Overstreet <kmo at daterainc.com>
Cc: Jens Axboe <axboe at kernel.dk>
Cc: Geert Uytterhoeven <geert at linux-m68k.org>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Paul Mackerras <paulus at samba.org>
Cc: "Ed L. Cashin" <ecashin at coraid.com>
Cc: Nick Piggin <npiggin at kernel.dk>
Cc: Lars Ellenberg <drbd-dev at lists.linbit.com>
Cc: Jiri Kosina <jkosina at suse.cz>
Cc: Paul Clements <Paul.Clements at steeleye.com>
Cc: Jim Paris <jim at jtan.com>
Cc: Geoff Levand <geoff at infradead.org>
Cc: Yehuda Sadeh <yehuda at inktank.com>
Cc: Sage Weil <sage at inktank.com>
Cc: Alex Elder <elder at inktank.com>
Cc: ceph-devel at vger.kernel.org
Cc: Joshua Morris <josh.h.morris at us.ibm.com>
Cc: Philip Kelleher <pjk1939 at linux.vnet.ibm.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com>
Cc: Jeremy Fitzhardinge <jeremy at goop.org>
Cc: Neil Brown <neilb at suse.de>
Cc: Martin Schwidefsky <schwidefsky at de.ibm.com>
Cc: Heiko Carstens <heiko.carstens at de.ibm.com>
Cc: linux390 at de.ibm.com
Cc: Nagalakshmi Nandigama <Nagalakshmi.Nandigama at lsi.com>
Cc: Sreekanth Reddy <Sreekanth.Reddy at lsi.com>
Cc: support at lsi.com
Cc: "James E.J. Bottomley" <JBottomley at parallels.com>
Cc: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Cc: Alexander Viro <viro at zeniv.linux.org.uk>
Cc: Steven Whitehouse <swhiteho at redhat.com>
Cc: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
Cc: Tejun Heo <tj at kernel.org>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: Guo Chao <yan at linux.vnet.ibm.com>
Cc: Asai Thambi S P <asamymuthupa at micron.com>
Cc: Selvan Mani <smani at micron.com>
Cc: Sam Bradshaw <sbradshaw at micron.com>
Cc: Matthew Wilcox <matthew.r.wilcox at intel.com>
Cc: Keith Busch <keith.busch at intel.com>
Cc: Stephen Hemminger <shemminger at vyatta.com>
Cc: Quoc-Son Anh <quoc-sonx.anh at intel.com>
Cc: Sebastian Ott <sebott at linux.vnet.ibm.com>
Cc: Nitin Gupta <ngupta at vflare.org>
Cc: Minchan Kim <minchan at kernel.org>
Cc: Jerome Marchand <jmarchan at redhat.com>
Cc: Seth Jennings <sjenning at linux.vnet.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen at oracle.com>
Cc: Mike Snitzer <snitzer at redhat.com>
Cc: Vivek Goyal <vgoyal at redhat.com>
Cc: "Darrick J. Wong" <darrick.wong at oracle.com>
Cc: Chris Metcalf <cmetcalf at tilera.com>
Cc: Jan Kara <jack at suse.cz>
Cc: linux-m68k at lists.linux-m68k.org
Cc: linuxppc-dev at lists.ozlabs.org
Cc: drbd-user at lists.linbit.com
Cc: nbd-general at lists.sourceforge.net
Cc: cbe-oss-dev at lists.ozlabs.org
Cc: xen-devel at lists.xensource.com
Cc: virtualization at lists.linux-foundation.org
Cc: linux-raid at vger.kernel.org
Cc: linux-s390 at vger.kernel.org
Cc: DL-MPTFusionLinux at lsi.com
Cc: linux-scsi at vger.kernel.org
Cc: devel at driverdev.osuosl.org
Cc: linux-fsdevel at vger.kernel.org
Cc: cluster-devel at redhat.com
Cc: linux-mm at kvack.org
Acked-by: Geoff Levand <geoff at infradead.org>
---
arch/m68k/emu/nfblock.c | 11 ++---
arch/powerpc/sysdev/axonram.c | 18 ++++-----
block/blk-merge.c | 45 ++++++++++-----------
drivers/block/aoe/aoecmd.c | 16 ++++----
drivers/block/brd.c | 12 +++---
drivers/block/drbd/drbd_main.c | 27 +++++++------
drivers/block/drbd/drbd_receiver.c | 13 +++---
drivers/block/drbd/drbd_worker.c | 8 ++--
drivers/block/floppy.c | 12 +++---
drivers/block/loop.c | 23 ++++++-----
drivers/block/mtip32xx/mtip32xx.c | 13 +++---
drivers/block/nbd.c | 12 +++---
drivers/block/nvme-core.c | 33 ++++++++-------
drivers/block/ps3vram.c | 10 ++---
drivers/block/rbd.c | 36 ++++++++---------
drivers/block/rsxx/dma.c | 11 ++---
drivers/md/bcache/btree.c | 4 +-
drivers/md/bcache/debug.c | 23 ++++++-----
drivers/md/bcache/io.c | 69 ++++++++++++++------------------
drivers/md/bcache/request.c | 28 ++++++-------
drivers/md/raid5.c | 12 +++---
drivers/s390/block/dcssblk.c | 14 +++----
drivers/s390/block/xpram.c | 10 ++---
drivers/scsi/mpt2sas/mpt2sas_transport.c | 31 +++++++-------
drivers/scsi/mpt3sas/mpt3sas_transport.c | 31 +++++++-------
drivers/staging/zram/zram_drv.c | 19 ++++-----
fs/bio-integrity.c | 30 +++++++-------
fs/bio.c | 18 ++++-----
include/linux/bio.h | 28 ++++++-------
include/linux/blkdev.h | 7 ++--
mm/bounce.c | 44 ++++++++++----------
31 files changed, 337 insertions(+), 331 deletions(-)
diff --git a/arch/m68k/emu/nfblock.c b/arch/m68k/emu/nfblock.c
index 9070d6c..d2b260c 100644
--- a/arch/m68k/emu/nfblock.c
+++ b/arch/m68k/emu/nfblock.c
@@ -62,17 +62,18 @@ struct nfhd_device {
static void nfhd_make_request(struct request_queue *queue, struct bio *bio)
{
struct nfhd_device *dev = queue->queuedata;
- struct bio_vec *bvec;
- int i, dir, len, shift;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
+ int dir, len, shift;
sector_t sec = bio->bi_iter.bi_sector;
dir = bio_data_dir(bio);
shift = dev->bshift;
- bio_for_each_segment(bvec, bio, i) {
- len = bvec->bv_len;
+ bio_for_each_segment(bvec, bio, iter) {
+ len = bvec.bv_len;
len >>= 9;
nfhd_read_write(dev->id, 0, dir, sec >> shift, len >> shift,
- bvec_to_phys(bvec));
+ bvec_to_phys(&bvec));
sec += len;
}
bio_endio(bio, 0);
diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c
index f33bcba..47b6b9f 100644
--- a/arch/powerpc/sysdev/axonram.c
+++ b/arch/powerpc/sysdev/axonram.c
@@ -109,28 +109,28 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio)
struct axon_ram_bank *bank = bio->bi_bdev->bd_disk->private_data;
unsigned long phys_mem, phys_end;
void *user_mem;
- struct bio_vec *vec;
+ struct bio_vec vec;
unsigned int transfered;
- unsigned short idx;
+ struct bvec_iter iter;
phys_mem = bank->io_addr + (bio->bi_iter.bi_sector <<
AXON_RAM_SECTOR_SHIFT);
phys_end = bank->io_addr + bank->size;
transfered = 0;
- bio_for_each_segment(vec, bio, idx) {
- if (unlikely(phys_mem + vec->bv_len > phys_end)) {
+ bio_for_each_segment(vec, bio, iter) {
+ if (unlikely(phys_mem + vec.bv_len > phys_end)) {
bio_io_error(bio);
return;
}
- user_mem = page_address(vec->bv_page) + vec->bv_offset;
+ user_mem = page_address(vec.bv_page) + vec.bv_offset;
if (bio_data_dir(bio) == READ)
- memcpy(user_mem, (void *) phys_mem, vec->bv_len);
+ memcpy(user_mem, (void *) phys_mem, vec.bv_len);
else
- memcpy((void *) phys_mem, user_mem, vec->bv_len);
+ memcpy((void *) phys_mem, user_mem, vec.bv_len);
- phys_mem += vec->bv_len;
- transfered += vec->bv_len;
+ phys_mem += vec.bv_len;
+ transfered += vec.bv_len;
}
bio_endio(bio, 0);
}
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 7750b25..8940562 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -12,10 +12,11 @@
static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
struct bio *bio)
{
- struct bio_vec *bv, *bvprv = NULL;
- int cluster, i, high, highprv = 1;
+ struct bio_vec bv, bvprv;
+ int cluster, high, highprv = 1;
unsigned int seg_size, nr_phys_segs;
struct bio *fbio, *bbio;
+ struct bvec_iter iter;
if (!bio)
return 0;
@@ -25,25 +26,25 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q,
seg_size = 0;
nr_phys_segs = 0;
for_each_bio(bio) {
- bio_for_each_segment(bv, bio, i) {
+ bio_for_each_segment(bv, bio, iter) {
/*
* the trick here is making sure that a high page is
* never considered part of another segment, since that
* might change with the bounce page.
*/
- high = page_to_pfn(bv->bv_page) > queue_bounce_pfn(q);
+ high = page_to_pfn(bv.bv_page) > queue_bounce_pfn(q);
if (high || highprv)
goto new_segment;
if (cluster) {
- if (seg_size + bv->bv_len
+ if (seg_size + bv.bv_len
> queue_max_segment_size(q))
goto new_segment;
- if (!BIOVEC_PHYS_MERGEABLE(bvprv, bv))
+ if (!BIOVEC_PHYS_MERGEABLE(&bvprv, &bv))
goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bv))
+ if (!BIOVEC_SEG_BOUNDARY(q, &bvprv, &bv))
goto new_segment;
- seg_size += bv->bv_len;
+ seg_size += bv.bv_len;
bvprv = bv;
continue;
}
@@ -54,7 +55,7 @@ new_segment:
nr_phys_segs++;
bvprv = bv;
- seg_size = bv->bv_len;
+ seg_size = bv.bv_len;
highprv = high;
}
bbio = bio;
@@ -110,21 +111,21 @@ static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
return 0;
}
-static void
+static inline void
__blk_segment_map_sg(struct request_queue *q, struct bio_vec *bvec,
- struct scatterlist *sglist, struct bio_vec **bvprv,
+ struct scatterlist *sglist, struct bio_vec *bvprv,
struct scatterlist **sg, int *nsegs, int *cluster)
{
int nbytes = bvec->bv_len;
- if (*bvprv && *cluster) {
+ if (*sg && *cluster) {
if ((*sg)->length + nbytes > queue_max_segment_size(q))
goto new_segment;
- if (!BIOVEC_PHYS_MERGEABLE(*bvprv, bvec))
+ if (!BIOVEC_PHYS_MERGEABLE(bvprv, bvec))
goto new_segment;
- if (!BIOVEC_SEG_BOUNDARY(q, *bvprv, bvec))
+ if (!BIOVEC_SEG_BOUNDARY(q, bvprv, bvec))
goto new_segment;
(*sg)->length += nbytes;
@@ -150,7 +151,7 @@ new_segment:
sg_set_page(*sg, bvec->bv_page, nbytes, bvec->bv_offset);
(*nsegs)++;
}
- *bvprv = bvec;
+ *bvprv = *bvec;
}
/*
@@ -160,7 +161,7 @@ new_segment:
int blk_rq_map_sg(struct request_queue *q, struct request *rq,
struct scatterlist *sglist)
{
- struct bio_vec *bvec, *bvprv;
+ struct bio_vec bvec, bvprv;
struct req_iterator iter;
struct scatterlist *sg;
int nsegs, cluster;
@@ -171,10 +172,9 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
/*
* for each bio in rq
*/
- bvprv = NULL;
sg = NULL;
rq_for_each_segment(bvec, rq, iter) {
- __blk_segment_map_sg(q, bvec, sglist, &bvprv, &sg,
+ __blk_segment_map_sg(q, &bvec, sglist, &bvprv, &sg,
&nsegs, &cluster);
} /* segments in rq */
@@ -223,18 +223,17 @@ EXPORT_SYMBOL(blk_rq_map_sg);
int blk_bio_map_sg(struct request_queue *q, struct bio *bio,
struct scatterlist *sglist)
{
- struct bio_vec *bvec, *bvprv;
+ struct bio_vec bvec, bvprv;
struct scatterlist *sg;
int nsegs, cluster;
- unsigned long i;
+ struct bvec_iter iter;
nsegs = 0;
cluster = blk_queue_cluster(q);
- bvprv = NULL;
sg = NULL;
- bio_for_each_segment(bvec, bio, i) {
- __blk_segment_map_sg(q, bvec, sglist, &bvprv, &sg,
+ bio_for_each_segment(bvec, bio, iter) {
+ __blk_segment_map_sg(q, &bvec, sglist, &bvprv, &sg,
&nsegs, &cluster);
} /* segments in bio */
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 9ec8c2d..f17260b 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -901,12 +901,12 @@ rqbiocnt(struct request *r)
static void
bio_pageinc(struct bio *bio)
{
- struct bio_vec *bv;
+ struct bio_vec bv;
struct page *page;
- int i;
+ struct bvec_iter iter;
- bio_for_each_segment(bv, bio, i) {
- page = bv->bv_page;
+ bio_for_each_segment(bv, bio, iter) {
+ page = bv.bv_page;
/* Non-zero page count for non-head members of
* compound pages is no longer allowed by the kernel,
* but this has never been seen here.
@@ -923,11 +923,11 @@ bio_pageinc(struct bio *bio)
static void
bio_pagedec(struct bio *bio)
{
- struct bio_vec *bv;
- int i;
+ struct bio_vec bv;
+ struct bvec_iter iter;
- bio_for_each_segment(bv, bio, i)
- atomic_dec(&bv->bv_page->_count);
+ bio_for_each_segment(bv, bio, iter)
+ atomic_dec(&bv.bv_page->_count);
}
static void
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index e269532..0395a3f 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -328,9 +328,9 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
struct block_device *bdev = bio->bi_bdev;
struct brd_device *brd = bdev->bd_disk->private_data;
int rw;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
sector_t sector;
- int i;
+ struct bvec_iter iter;
int err = -EIO;
sector = bio->bi_iter.bi_sector;
@@ -347,10 +347,10 @@ static void brd_make_request(struct request_queue *q, struct bio *bio)
if (rw == READA)
rw = READ;
- bio_for_each_segment(bvec, bio, i) {
- unsigned int len = bvec->bv_len;
- err = brd_do_bvec(brd, bvec->bv_page, len,
- bvec->bv_offset, rw, sector);
+ bio_for_each_segment(bvec, bio, iter) {
+ unsigned int len = bvec.bv_len;
+ err = brd_do_bvec(brd, bvec.bv_page, len,
+ bvec.bv_offset, rw, sector);
if (err)
break;
sector += len >> SECTOR_SHIFT;
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 55635ed..1589ea4 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -1537,15 +1537,17 @@ static int _drbd_send_page(struct drbd_conf *mdev, struct page *page,
static int _drbd_send_bio(struct drbd_conf *mdev, struct bio *bio)
{
- struct bio_vec *bvec;
- int i;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
+
/* hint all but last page with MSG_MORE */
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
int err;
- err = _drbd_no_send_page(mdev, bvec->bv_page,
- bvec->bv_offset, bvec->bv_len,
- i == bio->bi_vcnt - 1 ? 0 : MSG_MORE);
+ err = _drbd_no_send_page(mdev, bvec.bv_page,
+ bvec.bv_offset, bvec.bv_len,
+ bio_iter_last(bio, iter)
+ ? 0 : MSG_MORE);
if (err)
return err;
}
@@ -1554,15 +1556,16 @@ static int _drbd_send_bio(struct drbd_conf *mdev, struct bio *bio)
static int _drbd_send_zc_bio(struct drbd_conf *mdev, struct bio *bio)
{
- struct bio_vec *bvec;
- int i;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
+
/* hint all but last page with MSG_MORE */
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
int err;
- err = _drbd_send_page(mdev, bvec->bv_page,
- bvec->bv_offset, bvec->bv_len,
- i == bio->bi_vcnt - 1 ? 0 : MSG_MORE);
+ err = _drbd_send_page(mdev, bvec.bv_page,
+ bvec.bv_offset, bvec.bv_len,
+ bio_iter_last(bio, iter) ? 0 : MSG_MORE);
if (err)
return err;
}
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index cf6d072..e54e2ef 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1595,9 +1595,10 @@ static int drbd_drain_block(struct drbd_conf *mdev, int data_size)
static int recv_dless_read(struct drbd_conf *mdev, struct drbd_request *req,
sector_t sector, int data_size)
{
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
struct bio *bio;
- int dgs, err, i, expect;
+ int dgs, err, expect;
void *dig_in = mdev->tconn->int_dig_in;
void *dig_vv = mdev->tconn->int_dig_vv;
@@ -1617,11 +1618,11 @@ static int recv_dless_read(struct drbd_conf *mdev, struct drbd_request *req,
bio = req->master_bio;
D_ASSERT(sector == bio->bi_iter.bi_sector);
- bio_for_each_segment(bvec, bio, i) {
- void *mapped = kmap(bvec->bv_page) + bvec->bv_offset;
- expect = min_t(int, data_size, bvec->bv_len);
+ bio_for_each_segment(bvec, bio, iter) {
+ void *mapped = kmap(bvec.bv_page) + bvec.bv_offset;
+ expect = min_t(int, data_size, bvec.bv_len);
err = drbd_recv_all_warn(mdev->tconn, mapped, expect);
- kunmap(bvec->bv_page);
+ kunmap(bvec.bv_page);
if (err)
return err;
data_size -= expect;
diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index 891c0ec..84d3175 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -313,8 +313,8 @@ void drbd_csum_bio(struct drbd_conf *mdev, struct crypto_hash *tfm, struct bio *
{
struct hash_desc desc;
struct scatterlist sg;
- struct bio_vec *bvec;
- int i;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
desc.tfm = tfm;
desc.flags = 0;
@@ -322,8 +322,8 @@ void drbd_csum_bio(struct drbd_conf *mdev, struct crypto_hash *tfm, struct bio *
sg_init_table(&sg, 1);
crypto_hash_init(&desc);
- bio_for_each_segment(bvec, bio, i) {
- sg_set_page(&sg, bvec->bv_page, bvec->bv_len, bvec->bv_offset);
+ bio_for_each_segment(bvec, bio, iter) {
+ sg_set_page(&sg, bvec.bv_page, bvec.bv_len, bvec.bv_offset);
crypto_hash_update(&desc, &sg, sg.length);
}
crypto_hash_final(&desc, digest);
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index bf7b8b2..f312e06 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -2351,7 +2351,7 @@ static void rw_interrupt(void)
/* Compute maximal contiguous buffer size. */
static int buffer_chain_size(void)
{
- struct bio_vec *bv;
+ struct bio_vec bv;
int size;
struct req_iterator iter;
char *base;
@@ -2360,10 +2360,10 @@ static int buffer_chain_size(void)
size = 0;
rq_for_each_segment(bv, current_req, iter) {
- if (page_address(bv->bv_page) + bv->bv_offset != base + size)
+ if (page_address(bv.bv_page) + bv.bv_offset != base + size)
break;
- size += bv->bv_len;
+ size += bv.bv_len;
}
return size >> 9;
@@ -2389,7 +2389,7 @@ static int transfer_size(int ssize, int max_sector, int max_size)
static void copy_buffer(int ssize, int max_sector, int max_sector_2)
{
int remaining; /* number of transferred 512-byte sectors */
- struct bio_vec *bv;
+ struct bio_vec bv;
char *buffer;
char *dma_buffer;
int size;
@@ -2427,10 +2427,10 @@ static void copy_buffer(int ssize, int max_sector, int max_sector_2)
if (!remaining)
break;
- size = bv->bv_len;
+ size = bv.bv_len;
SUPBOUND(size, remaining);
- buffer = page_address(bv->bv_page) + bv->bv_offset;
+ buffer = page_address(bv.bv_page) + bv.bv_offset;
if (dma_buffer + size >
floppy_track_buffer + (max_buffer_sectors << 10) ||
dma_buffer < floppy_track_buffer) {
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 2440b50..0410fe9 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -288,9 +288,10 @@ static int lo_send(struct loop_device *lo, struct bio *bio, loff_t pos)
{
int (*do_lo_send)(struct loop_device *, struct bio_vec *, loff_t,
struct page *page);
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
struct page *page = NULL;
- int i, ret = 0;
+ int ret = 0;
if (lo->transfer != transfer_none) {
page = alloc_page(GFP_NOIO | __GFP_HIGHMEM);
@@ -302,11 +303,11 @@ static int lo_send(struct loop_device *lo, struct bio *bio, loff_t pos)
do_lo_send = do_lo_send_direct_write;
}
- bio_for_each_segment(bvec, bio, i) {
- ret = do_lo_send(lo, bvec, pos, page);
+ bio_for_each_segment(bvec, bio, iter) {
+ ret = do_lo_send(lo, &bvec, pos, page);
if (ret < 0)
break;
- pos += bvec->bv_len;
+ pos += bvec.bv_len;
}
if (page) {
kunmap(page);
@@ -392,20 +393,20 @@ do_lo_receive(struct loop_device *lo,
static int
lo_receive(struct loop_device *lo, struct bio *bio, int bsize, loff_t pos)
{
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
ssize_t s;
- int i;
- bio_for_each_segment(bvec, bio, i) {
- s = do_lo_receive(lo, bvec, bsize, pos);
+ bio_for_each_segment(bvec, bio, iter) {
+ s = do_lo_receive(lo, &bvec, bsize, pos);
if (s < 0)
return s;
- if (s != bvec->bv_len) {
+ if (s != bvec.bv_len) {
zero_fill_bio(bio);
break;
}
- pos += bvec->bv_len;
+ pos += bvec.bv_len;
}
return 0;
}
diff --git a/drivers/block/mtip32xx/mtip32xx.c b/drivers/block/mtip32xx/mtip32xx.c
index a49bdaf..128b1b7 100644
--- a/drivers/block/mtip32xx/mtip32xx.c
+++ b/drivers/block/mtip32xx/mtip32xx.c
@@ -3863,8 +3863,9 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio)
{
struct driver_data *dd = queue->queuedata;
struct scatterlist *sg;
- struct bio_vec *bvec;
- int i, nents = 0;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
+ int nents = 0;
int tag = 0, unaligned = 0;
if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) {
@@ -3923,11 +3924,11 @@ static void mtip_make_request(struct request_queue *queue, struct bio *bio)
}
/* Create the scatter list for this bio. */
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
sg_set_page(&sg[nents],
- bvec->bv_page,
- bvec->bv_len,
- bvec->bv_offset);
+ bvec.bv_page,
+ bvec.bv_len,
+ bvec.bv_offset);
nents++;
}
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 2dc3b51..aa362f4 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -271,7 +271,7 @@ static int nbd_send_req(struct nbd_device *nbd, struct request *req)
if (nbd_cmd(req) == NBD_CMD_WRITE) {
struct req_iterator iter;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
/*
* we are really probing at internals to determine
* whether to set MSG_MORE or not...
@@ -281,8 +281,8 @@ static int nbd_send_req(struct nbd_device *nbd, struct request *req)
if (!rq_iter_last(req, iter))
flags = MSG_MORE;
dprintk(DBG_TX, "%s: request %p: sending %d bytes data\n",
- nbd->disk->disk_name, req, bvec->bv_len);
- result = sock_send_bvec(nbd, bvec, flags);
+ nbd->disk->disk_name, req, bvec.bv_len);
+ result = sock_send_bvec(nbd, &bvec, flags);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk),
"Send data failed (result %d)\n",
@@ -378,10 +378,10 @@ static struct request *nbd_read_stat(struct nbd_device *nbd)
nbd->disk->disk_name, req);
if (nbd_cmd(req) == NBD_CMD_READ) {
struct req_iterator iter;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
rq_for_each_segment(bvec, req, iter) {
- result = sock_recv_bvec(nbd, bvec);
+ result = sock_recv_bvec(nbd, &bvec);
if (result <= 0) {
dev_err(disk_to_dev(nbd->disk), "Receive data failed (result %d)\n",
result);
@@ -389,7 +389,7 @@ static struct request *nbd_read_stat(struct nbd_device *nbd)
return req;
}
dprintk(DBG_RX, "%s: request %p: got %d bytes data\n",
- nbd->disk->disk_name, req, bvec->bv_len);
+ nbd->disk->disk_name, req, bvec.bv_len);
}
}
return req;
diff --git a/drivers/block/nvme-core.c b/drivers/block/nvme-core.c
index 685cfb1..1982f346 100644
--- a/drivers/block/nvme-core.c
+++ b/drivers/block/nvme-core.c
@@ -517,9 +517,11 @@ static int nvme_split_and_submit(struct bio *bio, struct nvme_queue *nvmeq,
static int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod,
struct bio *bio, enum dma_data_direction dma_dir, int psegs)
{
- struct bio_vec *bvec, *bvprv = NULL;
+ struct bio_vec bvec, bvprv;
+ struct bvec_iter iter;
struct scatterlist *sg = NULL;
- int i, length = 0, nsegs = 0, split_len = bio->bi_iter.bi_size;
+ int length = 0, nsegs = 0, split_len = bio->bi_iter.bi_size;
+ int first = 1;
if (nvmeq->dev->stripe_size)
split_len = nvmeq->dev->stripe_size -
@@ -527,25 +529,28 @@ static int nvme_map_bio(struct nvme_queue *nvmeq, struct nvme_iod *iod,
(nvmeq->dev->stripe_size - 1));
sg_init_table(iod->sg, psegs);
- bio_for_each_segment(bvec, bio, i) {
- if (bvprv && BIOVEC_PHYS_MERGEABLE(bvprv, bvec)) {
- sg->length += bvec->bv_len;
+ bio_for_each_segment(bvec, bio, iter) {
+ if (!first && BIOVEC_PHYS_MERGEABLE(&bvprv, &bvec)) {
+ sg->length += bvec.bv_len;
} else {
- if (bvprv && BIOVEC_NOT_VIRT_MERGEABLE(bvprv, bvec))
- return nvme_split_and_submit(bio, nvmeq, i,
- length, 0);
+ if (!first && BIOVEC_NOT_VIRT_MERGEABLE(&bvprv, &bvec))
+ return nvme_split_and_submit(bio, nvmeq,
+ iter.bi_idx,
+ length, 0);
sg = sg ? sg + 1 : iod->sg;
- sg_set_page(sg, bvec->bv_page, bvec->bv_len,
- bvec->bv_offset);
+ sg_set_page(sg, bvec.bv_page,
+ bvec.bv_len, bvec.bv_offset);
nsegs++;
}
- if (split_len - length < bvec->bv_len)
- return nvme_split_and_submit(bio, nvmeq, i, split_len,
- split_len - length);
- length += bvec->bv_len;
+ if (split_len - length < bvec.bv_len)
+ return nvme_split_and_submit(bio, nvmeq, iter.bi_idx,
+ split_len,
+ split_len - length);
+ length += bvec.bv_len;
bvprv = bvec;
+ first = 0;
}
iod->nents = nsegs;
sg_mark_end(sg);
diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
index 06a2e53..e473c2e 100644
--- a/drivers/block/ps3vram.c
+++ b/drivers/block/ps3vram.c
@@ -555,14 +555,14 @@ static struct bio *ps3vram_do_bio(struct ps3_system_bus_device *dev,
const char *op = write ? "write" : "read";
loff_t offset = bio->bi_sector << 9;
int error = 0;
- struct bio_vec *bvec;
- unsigned int i;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
struct bio *next;
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
/* PS3 is ppc64, so we don't handle highmem */
- char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
- size_t len = bvec->bv_len, retlen;
+ char *ptr = page_address(bvec.bv_page) + bvec.bv_offset;
+ size_t len = bvec.bv_len, retlen;
dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
len, offset);
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 99334ac..f99f347 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -1103,23 +1103,23 @@ static void bio_chain_put(struct bio *chain)
*/
static void zero_bio_chain(struct bio *chain, int start_ofs)
{
- struct bio_vec *bv;
+ struct bio_vec bv;
+ struct bvec_iter iter;
unsigned long flags;
void *buf;
- int i;
int pos = 0;
while (chain) {
- bio_for_each_segment(bv, chain, i) {
- if (pos + bv->bv_len > start_ofs) {
+ bio_for_each_segment(bv, chain, iter) {
+ if (pos + bv.bv_len > start_ofs) {
int remainder = max(start_ofs - pos, 0);
- buf = bvec_kmap_irq(bv, &flags);
+ buf = bvec_kmap_irq(&bv, &flags);
memset(buf + remainder, 0,
- bv->bv_len - remainder);
+ bv.bv_len - remainder);
flush_dcache_page(bv->bv_page);
bvec_kunmap_irq(buf, &flags);
}
- pos += bv->bv_len;
+ pos += bv.bv_len;
}
chain = chain->bi_next;
@@ -1167,11 +1167,11 @@ static struct bio *bio_clone_range(struct bio *bio_src,
unsigned int len,
gfp_t gfpmask)
{
- struct bio_vec *bv;
+ struct bio_vec bv;
+ struct bvec_iter iter;
+ struct bvec_iter end_iter;
unsigned int resid;
- unsigned short idx;
unsigned int voff;
- unsigned short end_idx;
unsigned short vcnt;
struct bio *bio;
@@ -1190,22 +1190,22 @@ static struct bio *bio_clone_range(struct bio *bio_src,
/* Find first affected segment... */
resid = offset;
- bio_for_each_segment(bv, bio_src, idx) {
- if (resid < bv->bv_len)
+ bio_for_each_segment(bv, bio_src, iter) {
+ if (resid < bv.bv_len)
break;
- resid -= bv->bv_len;
+ resid -= bv.bv_len;
}
voff = resid;
/* ...and the last affected segment */
resid += len;
- __bio_for_each_segment(bv, bio_src, end_idx, idx) {
- if (resid <= bv->bv_len)
+ __bio_for_each_segment(bv, bio_src, end_iter, iter) {
+ if (resid <= bv.bv_len)
break;
- resid -= bv->bv_len;
+ resid -= bv.bv_len;
}
- vcnt = end_idx - idx + 1;
+ vcnt = end_iter.bi_idx = iter.bi_idx + 1;
/* Build the clone */
@@ -1223,7 +1223,7 @@ static struct bio *bio_clone_range(struct bio *bio_src,
* Copy over our part of the bio_vec, then update the first
* and last (or only) entries.
*/
- memcpy(&bio->bi_io_vec[0], &bio_src->bi_io_vec[idx],
+ memcpy(&bio->bi_io_vec[0], &bio_src->bi_io_vec[iter.bi_idx],
vcnt * sizeof (struct bio_vec));
bio->bi_io_vec[0].bv_offset += voff;
if (vcnt > 1) {
diff --git a/drivers/block/rsxx/dma.c b/drivers/block/rsxx/dma.c
index 9e6318a..31a899a 100644
--- a/drivers/block/rsxx/dma.c
+++ b/drivers/block/rsxx/dma.c
@@ -655,7 +655,8 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card,
void *cb_data)
{
struct list_head dma_list[RSXX_MAX_TARGETS];
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
unsigned long long addr8;
unsigned int laddr;
unsigned int bv_len;
@@ -693,9 +694,9 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card,
bv_len -= RSXX_HW_BLK_SIZE;
}
} else {
- bio_for_each_segment(bvec, bio, i) {
- bv_len = bvec->bv_len;
- bv_off = bvec->bv_offset;
+ bio_for_each_segment(bvec, bio, iter) {
+ bv_len = bvec.bv_len;
+ bv_off = bvec.bv_offset;
while (bv_len > 0) {
tgt = rsxx_get_dma_tgt(card, addr8);
@@ -707,7 +708,7 @@ int rsxx_dma_queue_bio(struct rsxx_cardinfo *card,
st = rsxx_queue_dma(card, &dma_list[tgt],
bio_data_dir(bio),
dma_off, dma_len,
- laddr, bvec->bv_page,
+ laddr, bvec.bv_page,
bv_off, cb, cb_data);
if (st)
goto bvec_err;
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
index 933ed8d..72c86ed 100644
--- a/drivers/md/bcache/btree.c
+++ b/drivers/md/bcache/btree.c
@@ -296,7 +296,7 @@ static void btree_node_write_done(struct closure *cl)
struct bio_vec *bv;
int n;
- __bio_for_each_segment(bv, b->bio, n, 0)
+ bio_for_each_segment_all(bv, b->bio, n)
__free_page(bv->bv_page);
__btree_node_write_done(cl);
@@ -355,7 +355,7 @@ static void do_btree_node_write(struct btree *b)
struct bio_vec *bv;
void *base = (void *) ((unsigned long) i & ~(PAGE_SIZE - 1));
- bio_for_each_segment(bv, b->bio, j)
+ bio_for_each_segment_all(bv, b->bio, j)
memcpy(page_address(bv->bv_page),
base + j * PAGE_SIZE, PAGE_SIZE);
diff --git a/drivers/md/bcache/debug.c b/drivers/md/bcache/debug.c
index 84c93a1..f001497 100644
--- a/drivers/md/bcache/debug.c
+++ b/drivers/md/bcache/debug.c
@@ -188,7 +188,8 @@ void bch_data_verify(struct search *s)
struct cached_dev *dc = container_of(s->d, struct cached_dev, disk);
struct closure *cl = &s->cl;
struct bio *check;
- struct bio_vec *bv;
+ struct bio_vec bv, *bv2;
+ struct bvec_iter iter;
int i;
check = bio_clone(s->orig_bio, GFP_NOIO);
@@ -205,24 +206,24 @@ void bch_data_verify(struct search *s)
closure_bio_submit(check, cl, &dc->disk);
closure_sync(cl);
- bio_for_each_segment(bv, s->orig_bio, i) {
- void *p1 = kmap(bv->bv_page);
- void *p2 = kmap(check->bi_io_vec[i].bv_page);
+ bio_for_each_segment(bv, s->orig_bio, iter) {
+ void *p1 = kmap(bv.bv_page);
+ void *p2 = kmap(check->bi_io_vec[iter.bi_idx].bv_page);
- if (memcmp(p1 + bv->bv_offset,
- p2 + bv->bv_offset,
- bv->bv_len))
+ if (memcmp(p1 + bv.bv_offset,
+ p2 + bv.bv_offset,
+ bv.bv_len))
printk(KERN_ERR
"bcache (%s): verify failed at sector %llu\n",
bdevname(dc->bdev, name),
(uint64_t) s->orig_bio->bi_iter.bi_sector);
- kunmap(bv->bv_page);
- kunmap(check->bi_io_vec[i].bv_page);
+ kunmap(bv.bv_page);
+ kunmap(check->bi_io_vec[iter.bi_idx].bv_page);
}
- __bio_for_each_segment(bv, check, i, 0)
- __free_page(bv->bv_page);
+ bio_for_each_segment_all(bv2, check, i)
+ __free_page(bv2->bv_page);
out_put:
bio_put(check);
}
diff --git a/drivers/md/bcache/io.c b/drivers/md/bcache/io.c
index dc44f06..9b5b6a4 100644
--- a/drivers/md/bcache/io.c
+++ b/drivers/md/bcache/io.c
@@ -22,12 +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_vec bv;
+ struct bvec_iter iter;
struct bio *clone = bio_alloc(GFP_NOIO, bio_segments(bio));
- bio_for_each_segment(bv, bio, i)
- clone->bi_io_vec[clone->bi_vcnt++] = *bv;
+ bio_for_each_segment(bv, bio, iter)
+ clone->bi_io_vec[clone->bi_vcnt++] = bv;
clone->bi_iter.bi_sector = bio->bi_iter.bi_sector;
clone->bi_bdev = bio->bi_bdev;
@@ -73,8 +73,9 @@ static void bch_generic_make_request_hack(struct bio *bio)
struct bio *bch_bio_split(struct bio *bio, int sectors,
gfp_t gfp, struct bio_set *bs)
{
- unsigned idx = bio->bi_iter.bi_idx, vcnt = 0, nbytes = sectors << 9;
- struct bio_vec *bv;
+ unsigned vcnt = 0, nbytes = sectors << 9;
+ struct bio_vec bv;
+ struct bvec_iter iter;
struct bio *ret = NULL;
BUG_ON(sectors <= 0);
@@ -86,49 +87,35 @@ struct bio *bch_bio_split(struct bio *bio, int sectors,
ret = bio_alloc_bioset(gfp, 1, bs);
if (!ret)
return NULL;
- idx = 0;
goto out;
}
- bio_for_each_segment(bv, bio, idx) {
- vcnt = idx - bio->bi_iter.bi_idx;
+ bio_for_each_segment(bv, bio, iter) {
+ vcnt++;
- if (!nbytes) {
- ret = bio_alloc_bioset(gfp, vcnt, bs);
- if (!ret)
- return NULL;
+ if (nbytes <= bv.bv_len)
+ break;
- memcpy(ret->bi_io_vec, __bio_iovec(bio),
- sizeof(struct bio_vec) * vcnt);
+ nbytes -= bv.bv_len;
+ }
- break;
- } else if (nbytes < bv->bv_len) {
- ret = bio_alloc_bioset(gfp, ++vcnt, bs);
- if (!ret)
- return NULL;
+ ret = bio_alloc_bioset(gfp, vcnt, bs);
+ if (!ret)
+ return NULL;
- memcpy(ret->bi_io_vec, __bio_iovec(bio),
- sizeof(struct bio_vec) * vcnt);
+ bio_for_each_segment(bv, bio, iter) {
+ ret->bi_io_vec[ret->bi_vcnt++] = bv;
- ret->bi_io_vec[vcnt - 1].bv_len = nbytes;
- bv->bv_offset += nbytes;
- bv->bv_len -= nbytes;
+ if (ret->bi_vcnt == vcnt)
break;
- }
-
- nbytes -= bv->bv_len;
}
+
+ ret->bi_io_vec[ret->bi_vcnt - 1].bv_len = nbytes;
out:
ret->bi_bdev = bio->bi_bdev;
ret->bi_iter.bi_sector = bio->bi_iter.bi_sector;
ret->bi_iter.bi_size = sectors << 9;
ret->bi_rw = bio->bi_rw;
- ret->bi_vcnt = vcnt;
- ret->bi_max_vecs = vcnt;
-
- bio->bi_iter.bi_sector += sectors;
- bio->bi_iter.bi_size -= sectors << 9;
- bio->bi_iter.bi_idx = idx;
if (bio_integrity(bio)) {
if (bio_integrity_clone(ret, bio, gfp)) {
@@ -137,9 +124,10 @@ out:
}
bio_integrity_trim(ret, 0, bio_sectors(ret));
- bio_integrity_trim(bio, bio_sectors(ret), bio_sectors(bio));
}
+ bio_advance(bio, ret->bi_iter.bi_size);
+
return ret;
}
@@ -155,12 +143,13 @@ static unsigned bch_bio_max_sectors(struct bio *bio)
if (bio_segments(bio) > max_segments ||
q->merge_bvec_fn) {
- struct bio_vec *bv;
- int i, seg = 0;
+ struct bio_vec bv;
+ struct bvec_iter iter;
+ unsigned seg = 0;
ret = 0;
- bio_for_each_segment(bv, bio, i) {
+ bio_for_each_segment(bv, bio, iter) {
struct bvec_merge_data bvm = {
.bi_bdev = bio->bi_bdev,
.bi_sector = bio->bi_iter.bi_sector,
@@ -172,11 +161,11 @@ static unsigned bch_bio_max_sectors(struct bio *bio)
break;
if (q->merge_bvec_fn &&
- q->merge_bvec_fn(q, &bvm, bv) < (int) bv->bv_len)
+ q->merge_bvec_fn(q, &bvm, &bv) < (int) bv.bv_len)
break;
seg++;
- ret += bv->bv_len >> 9;
+ ret += bv.bv_len >> 9;
}
}
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index d94c08f..39cffcc 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -198,14 +198,14 @@ static bool verify(struct cached_dev *dc, struct bio *bio)
static void bio_csum(struct bio *bio, struct bkey *k)
{
- struct bio_vec *bv;
+ struct bio_vec bv;
+ struct bvec_iter iter;
uint64_t csum = 0;
- int i;
- bio_for_each_segment(bv, bio, i) {
- void *d = kmap(bv->bv_page) + bv->bv_offset;
- csum = bch_crc64_update(csum, d, bv->bv_len);
- kunmap(bv->bv_page);
+ bio_for_each_segment(bv, bio, iter) {
+ void *d = kmap(bv.bv_page) + bv.bv_offset;
+ csum = bch_crc64_update(csum, d, bv.bv_len);
+ kunmap(bv.bv_page);
}
k->ptr[KEY_PTRS(k)] = csum & (~0ULL >> 1);
@@ -761,7 +761,7 @@ static void cached_dev_read_complete(struct closure *cl)
int i;
struct bio_vec *bv;
- __bio_for_each_segment(bv, s->op.cache_bio, i, 0)
+ bio_for_each_segment_all(bv, s->op.cache_bio, i)
__free_page(bv->bv_page);
}
@@ -1236,17 +1236,17 @@ void bch_cached_dev_request_init(struct cached_dev *dc)
static int flash_dev_cache_miss(struct btree *b, struct search *s,
struct bio *bio, unsigned sectors)
{
- struct bio_vec *bv;
- int i;
+ struct bio_vec bv;
+ struct bvec_iter iter;
/* Zero fill bio */
- bio_for_each_segment(bv, bio, i) {
- unsigned j = min(bv->bv_len >> 9, sectors);
+ bio_for_each_segment(bv, bio, iter) {
+ unsigned j = min(bv.bv_len >> 9, sectors);
- void *p = kmap(bv->bv_page);
- memset(p + bv->bv_offset, 0, j << 9);
- kunmap(bv->bv_page);
+ void *p = kmap(bv.bv_page);
+ memset(p + bv.bv_offset, 0, j << 9);
+ kunmap(bv.bv_page);
sectors -= j;
}
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 3b10a02..5183e94 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -727,9 +727,9 @@ static struct dma_async_tx_descriptor *
async_copy_data(int frombio, struct bio *bio, struct page *page,
sector_t sector, struct dma_async_tx_descriptor *tx)
{
- struct bio_vec *bvl;
+ struct bio_vec bvl;
+ struct bvec_iter iter;
struct page *bio_page;
- int i;
int page_offset;
struct async_submit_ctl submit;
enum async_tx_flags flags = 0;
@@ -743,8 +743,8 @@ async_copy_data(int frombio, struct bio *bio, struct page *page,
flags |= ASYNC_TX_FENCE;
init_async_submit(&submit, flags, tx, NULL, NULL, NULL);
- bio_for_each_segment(bvl, bio, i) {
- int len = bvl->bv_len;
+ bio_for_each_segment(bvl, bio, iter) {
+ int len = bvl.bv_len;
int clen;
int b_offset = 0;
@@ -760,8 +760,8 @@ async_copy_data(int frombio, struct bio *bio, struct page *page,
clen = len;
if (clen > 0) {
- b_offset += bvl->bv_offset;
- bio_page = bvl->bv_page;
+ b_offset += bvl.bv_offset;
+ bio_page = bvl.bv_page;
if (frombio)
tx = async_memcpy(page, bio_page, page_offset,
b_offset, clen, &submit);
diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
index 16814a8..7fef1f9 100644
--- a/drivers/s390/block/dcssblk.c
+++ b/drivers/s390/block/dcssblk.c
@@ -808,12 +808,12 @@ static void
dcssblk_make_request(struct request_queue *q, struct bio *bio)
{
struct dcssblk_dev_info *dev_info;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
unsigned long index;
unsigned long page_addr;
unsigned long source_addr;
unsigned long bytes_done;
- int i;
bytes_done = 0;
dev_info = bio->bi_bdev->bd_disk->private_data;
@@ -844,21 +844,21 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
}
index = (bio->bi_iter.bi_sector >> 3);
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
page_addr = (unsigned long)
- page_address(bvec->bv_page) + bvec->bv_offset;
+ page_address(bvec.bv_page) + bvec.bv_offset;
source_addr = dev_info->start + (index<<12) + bytes_done;
if (unlikely((page_addr & 4095) != 0) || (bvec->bv_len & 4095) != 0)
// More paranoia.
goto fail;
if (bio_data_dir(bio) == READ) {
memcpy((void*)page_addr, (void*)source_addr,
- bvec->bv_len);
+ bvec.bv_len);
} else {
memcpy((void*)source_addr, (void*)page_addr,
- bvec->bv_len);
+ bvec.bv_len);
}
- bytes_done += bvec->bv_len;
+ bytes_done += bvec.bv_len;
}
bio_endio(bio, 0);
return;
diff --git a/drivers/s390/block/xpram.c b/drivers/s390/block/xpram.c
index dd4e73f..3e530f9 100644
--- a/drivers/s390/block/xpram.c
+++ b/drivers/s390/block/xpram.c
@@ -184,11 +184,11 @@ static unsigned long xpram_highest_page_index(void)
static void xpram_make_request(struct request_queue *q, struct bio *bio)
{
xpram_device_t *xdev = bio->bi_bdev->bd_disk->private_data;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
unsigned int index;
unsigned long page_addr;
unsigned long bytes;
- int i;
if ((bio->bi_iter.bi_sector & 7) != 0 ||
(bio->bi_iter.bi_size & 4095) != 0)
@@ -200,10 +200,10 @@ static void xpram_make_request(struct request_queue *q, struct bio *bio)
if ((bio->bi_iter.bi_sector >> 3) > 0xffffffffU - xdev->offset)
goto fail;
index = (bio->bi_iter.bi_sector >> 3) + xdev->offset;
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
page_addr = (unsigned long)
- kmap(bvec->bv_page) + bvec->bv_offset;
- bytes = bvec->bv_len;
+ kmap(bvec.bv_page) + bvec.bv_offset;
+ bytes = bvec.bv_len;
if ((page_addr & 4095) != 0 || (bytes & 4095) != 0)
/* More paranoia. */
goto fail;
diff --git a/drivers/scsi/mpt2sas/mpt2sas_transport.c b/drivers/scsi/mpt2sas/mpt2sas_transport.c
index 193e7ae..2c2e01e 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -1898,7 +1898,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
struct MPT2SAS_ADAPTER *ioc = shost_priv(shost);
Mpi2SmpPassthroughRequest_t *mpi_request;
Mpi2SmpPassthroughReply_t *mpi_reply;
- int rc, i;
+ int rc;
u16 smid;
u32 ioc_state;
unsigned long timeleft;
@@ -1913,7 +1913,8 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
void *pci_addr_out = NULL;
u16 wait_state_count;
struct request *rsp = req->next_rq;
- struct bio_vec *bvec = NULL;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
if (!rsp) {
printk(MPT2SAS_ERR_FMT "%s: the smp response space is "
@@ -1952,11 +1953,11 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
goto out;
}
- bio_for_each_segment(bvec, req->bio, i) {
+ bio_for_each_segment(bvec, req->bio, iter) {
memcpy(pci_addr_out + offset,
- page_address(bvec->bv_page) + bvec->bv_offset,
- bvec->bv_len);
- offset += bvec->bv_len;
+ page_address(bvec.bv_page) + bvec.bv_offset,
+ bvec.bv_len);
+ offset += bvec.bv_len;
}
} else {
dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
@@ -2103,19 +2104,19 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
u32 offset = 0;
u32 bytes_to_copy =
le16_to_cpu(mpi_reply->ResponseDataLength);
- bio_for_each_segment(bvec, rsp->bio, i) {
- if (bytes_to_copy <= bvec->bv_len) {
- memcpy(page_address(bvec->bv_page) +
- bvec->bv_offset, pci_addr_in +
+ bio_for_each_segment(bvec, rsp->bio, iter) {
+ if (bytes_to_copy <= bvec.bv_len) {
+ memcpy(page_address(bvec.bv_page) +
+ bvec.bv_offset, pci_addr_in +
offset, bytes_to_copy);
break;
} else {
- memcpy(page_address(bvec->bv_page) +
- bvec->bv_offset, pci_addr_in +
- offset, bvec->bv_len);
- bytes_to_copy -= bvec->bv_len;
+ memcpy(page_address(bvec.bv_page) +
+ bvec.bv_offset, pci_addr_in +
+ offset, bvec.bv_len);
+ bytes_to_copy -= bvec.bv_len;
}
- offset += bvec->bv_len;
+ offset += bvec.bv_len;
}
}
} else {
diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c
index dcadd56..f279f46 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_transport.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c
@@ -1881,7 +1881,7 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
struct MPT3SAS_ADAPTER *ioc = shost_priv(shost);
Mpi2SmpPassthroughRequest_t *mpi_request;
Mpi2SmpPassthroughReply_t *mpi_reply;
- int rc, i;
+ int rc;
u16 smid;
u32 ioc_state;
unsigned long timeleft;
@@ -1895,7 +1895,8 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
void *pci_addr_out = NULL;
u16 wait_state_count;
struct request *rsp = req->next_rq;
- struct bio_vec *bvec = NULL;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
if (!rsp) {
pr_err(MPT3SAS_FMT "%s: the smp response space is missing\n",
@@ -1935,11 +1936,11 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
goto out;
}
- bio_for_each_segment(bvec, req->bio, i) {
+ bio_for_each_segment(bvec, req->bio, iter) {
memcpy(pci_addr_out + offset,
- page_address(bvec->bv_page) + bvec->bv_offset,
- bvec->bv_len);
- offset += bvec->bv_len;
+ page_address(bvec.bv_page) + bvec.bv_offset,
+ bvec.bv_len);
+ offset += bvec.bv_len;
}
} else {
dma_addr_out = pci_map_single(ioc->pdev, bio_data(req->bio),
@@ -2064,19 +2065,19 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
u32 offset = 0;
u32 bytes_to_copy =
le16_to_cpu(mpi_reply->ResponseDataLength);
- bio_for_each_segment(bvec, rsp->bio, i) {
- if (bytes_to_copy <= bvec->bv_len) {
- memcpy(page_address(bvec->bv_page) +
- bvec->bv_offset, pci_addr_in +
+ bio_for_each_segment(bvec, rsp->bio, iter) {
+ if (bytes_to_copy <= bvec.bv_len) {
+ memcpy(page_address(bvec.bv_page) +
+ bvec.bv_offset, pci_addr_in +
offset, bytes_to_copy);
break;
} else {
- memcpy(page_address(bvec->bv_page) +
- bvec->bv_offset, pci_addr_in +
- offset, bvec->bv_len);
- bytes_to_copy -= bvec->bv_len;
+ memcpy(page_address(bvec.bv_page) +
+ bvec.bv_offset, pci_addr_in +
+ offset, bvec.bv_len);
+ bytes_to_copy -= bvec.bv_len;
}
- offset += bvec->bv_len;
+ offset += bvec.bv_len;
}
}
} else {
diff --git a/drivers/staging/zram/zram_drv.c b/drivers/staging/zram/zram_drv.c
index 34ee87d..72fec3b 100644
--- a/drivers/staging/zram/zram_drv.c
+++ b/drivers/staging/zram/zram_drv.c
@@ -642,9 +642,10 @@ static ssize_t reset_store(struct device *dev,
static void __zram_make_request(struct zram *zram, struct bio *bio, int rw)
{
- int i, offset;
+ int offset;
u32 index;
- struct bio_vec *bvec;
+ struct bio_vec bvec;
+ struct bvec_iter iter;
switch (rw) {
case READ:
@@ -659,33 +660,33 @@ static void __zram_make_request(struct zram *zram, struct bio *bio, int rw)
offset = (bio->bi_iter.bi_sector &
(SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT;
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment(bvec, bio, iter) {
int max_transfer_size = PAGE_SIZE - offset;
- if (bvec->bv_len > max_transfer_size) {
+ if (bvec.bv_len > max_transfer_size) {
/*
* zram_bvec_rw() can only make operation on a single
* zram page. Split the bio vector.
*/
struct bio_vec bv;
- bv.bv_page = bvec->bv_page;
+ bv.bv_page = bvec.bv_page;
bv.bv_len = max_transfer_size;
- bv.bv_offset = bvec->bv_offset;
+ bv.bv_offset = bvec.bv_offset;
if (zram_bvec_rw(zram, &bv, index, offset, bio, rw) < 0)
goto out;
- bv.bv_len = bvec->bv_len - max_transfer_size;
+ bv.bv_len = bvec.bv_len - max_transfer_size;
bv.bv_offset += max_transfer_size;
if (zram_bvec_rw(zram, &bv, index+1, 0, bio, rw) < 0)
goto out;
} else
- if (zram_bvec_rw(zram, bvec, index, offset, bio, rw)
+ if (zram_bvec_rw(zram, &bvec, index, offset, bio, rw)
< 0)
goto out;
- update_position(&index, &offset, bvec);
+ update_position(&index, &offset, &bvec);
}
set_bit(BIO_UPTODATE, &bio->bi_flags);
diff --git a/fs/bio-integrity.c b/fs/bio-integrity.c
index f824c30..4220b96 100644
--- a/fs/bio-integrity.c
+++ b/fs/bio-integrity.c
@@ -299,25 +299,26 @@ static void bio_integrity_generate(struct bio *bio)
{
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
struct blk_integrity_exchg bix;
- struct bio_vec *bv;
+ struct bio_vec bv;
+ struct bvec_iter iter;
sector_t sector = bio->bi_iter.bi_sector;
- unsigned int i, sectors, total;
+ unsigned int sectors, total;
void *prot_buf = bio->bi_integrity->bip_buf;
total = 0;
bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
bix.sector_size = bi->sector_size;
- bio_for_each_segment(bv, bio, i) {
- void *kaddr = kmap_atomic(bv->bv_page);
- bix.data_buf = kaddr + bv->bv_offset;
- bix.data_size = bv->bv_len;
+ bio_for_each_segment(bv, bio, iter) {
+ void *kaddr = kmap_atomic(bv.bv_page);
+ bix.data_buf = kaddr + bv.bv_offset;
+ bix.data_size = bv.bv_len;
bix.prot_buf = prot_buf;
bix.sector = sector;
bi->generate_fn(&bix);
- sectors = bv->bv_len / bi->sector_size;
+ sectors = bv.bv_len / bi->sector_size;
sector += sectors;
prot_buf += sectors * bi->tuple_size;
total += sectors * bi->tuple_size;
@@ -441,19 +442,20 @@ static int bio_integrity_verify(struct bio *bio)
{
struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev);
struct blk_integrity_exchg bix;
- struct bio_vec *bv;
+ struct bio_vec bv;
+ struct bvec_iter iter;
sector_t sector = bio->bi_integrity->bip_sector;
- unsigned int i, sectors, total, ret;
+ unsigned int sectors, total, ret;
void *prot_buf = bio->bi_integrity->bip_buf;
ret = total = 0;
bix.disk_name = bio->bi_bdev->bd_disk->disk_name;
bix.sector_size = bi->sector_size;
- bio_for_each_segment(bv, bio, i) {
- void *kaddr = kmap_atomic(bv->bv_page);
- bix.data_buf = kaddr + bv->bv_offset;
- bix.data_size = bv->bv_len;
+ bio_for_each_segment(bv, bio, iter) {
+ void *kaddr = kmap_atomic(bv.bv_page);
+ bix.data_buf = kaddr + bv.bv_offset;
+ bix.data_size = bv.bv_len;
bix.prot_buf = prot_buf;
bix.sector = sector;
@@ -464,7 +466,7 @@ static int bio_integrity_verify(struct bio *bio)
return ret;
}
- sectors = bv->bv_len / bi->sector_size;
+ sectors = bv.bv_len / bi->sector_size;
sector += sectors;
prot_buf += sectors * bi->tuple_size;
total += sectors * bi->tuple_size;
diff --git a/fs/bio.c b/fs/bio.c
index d10952c..805befd 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -473,13 +473,13 @@ EXPORT_SYMBOL(bio_alloc_bioset);
void zero_fill_bio(struct bio *bio)
{
unsigned long flags;
- struct bio_vec *bv;
- int i;
+ struct bio_vec bv;
+ struct bvec_iter iter;
- bio_for_each_segment(bv, bio, i) {
- char *data = bvec_kmap_irq(bv, &flags);
- memset(data, 0, bv->bv_len);
- flush_dcache_page(bv->bv_page);
+ bio_for_each_segment(bv, bio, iter) {
+ char *data = bvec_kmap_irq(&bv, &flags);
+ memset(data, 0, bv.bv_len);
+ flush_dcache_page(bv.bv_page);
bvec_kunmap_irq(data, &flags);
}
}
@@ -1677,10 +1677,10 @@ void bio_check_pages_dirty(struct bio *bio)
#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
void bio_flush_dcache_pages(struct bio *bi)
{
- int i;
struct bio_vec *bvec;
+ struct bvec_iter iter;
- bio_for_each_segment(bvec, bi, i)
+ bio_for_each_segment(bvec, bi, iter)
flush_dcache_page(bvec->bv_page);
}
EXPORT_SYMBOL(bio_flush_dcache_pages);
@@ -1830,7 +1830,7 @@ void bio_trim(struct bio *bio, int offset, int size)
bio->bi_iter.bi_idx = 0;
}
/* Make sure vcnt and last bv are not too big */
- bio_for_each_segment(bvec, bio, i) {
+ bio_for_each_segment_all(bvec, bio, i) {
if (sofar + bvec->bv_len > size)
bvec->bv_len = size - sofar;
if (bvec->bv_len == 0) {
diff --git a/include/linux/bio.h b/include/linux/bio.h
index 58d5647..5724feb 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -63,10 +63,13 @@
*/
#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_iovec(bio) (*__bio_iovec(bio))
+
+#define bio_iter_iovec(bio, iter) ((bio)->bi_io_vec[(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(bio))
+
#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)))
@@ -134,15 +137,6 @@ static inline void *bio_data(struct bio *bio)
#define bio_io_error(bio) bio_endio((bio), -EIO)
/*
- * drivers should not use the __ version unless they _really_ know what
- * they're doing
- */
-#define __bio_for_each_segment(bvl, bio, i, start_idx) \
- for (bvl = bio_iovec_idx((bio), (start_idx)), i = (start_idx); \
- i < (bio)->bi_vcnt; \
- bvl++, i++)
-
-/*
* drivers should _never_ use the all version - the bio may have been split
* before it got to the driver and the driver won't own all of it
*/
@@ -151,10 +145,16 @@ static inline void *bio_data(struct bio *bio)
bvl = bio_iovec_idx((bio), (i)), i < (bio)->bi_vcnt; \
i++)
-#define bio_for_each_segment(bvl, bio, i) \
- for (i = (bio)->bi_iter.bi_idx; \
- bvl = bio_iovec_idx((bio), (i)), i < (bio)->bi_vcnt; \
- i++)
+#define __bio_for_each_segment(bvl, bio, iter, start) \
+ for (iter = (start); \
+ bvl = bio_iter_iovec((bio), (iter)), \
+ (iter).bi_idx < (bio)->bi_vcnt; \
+ (iter).bi_idx++)
+
+#define bio_for_each_segment(bvl, bio, iter) \
+ __bio_for_each_segment(bvl, bio, iter, (bio)->bi_iter)
+
+#define bio_iter_last(bio, iter) ((iter).bi_idx == (bio)->bi_vcnt - 1)
/*
* get a reference to a bio, so it won't disappear. the intended use is
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2fdb4a4..1b9d47b 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -699,7 +699,7 @@ struct rq_map_data {
};
struct req_iterator {
- int i;
+ struct bvec_iter iter;
struct bio *bio;
};
@@ -712,10 +712,11 @@ struct req_iterator {
#define rq_for_each_segment(bvl, _rq, _iter) \
__rq_for_each_bio(_iter.bio, _rq) \
- bio_for_each_segment(bvl, _iter.bio, _iter.i)
+ bio_for_each_segment(bvl, _iter.bio, _iter.iter)
#define rq_iter_last(rq, _iter) \
- (_iter.bio->bi_next == NULL && _iter.i == _iter.bio->bi_vcnt-1)
+ (_iter.bio->bi_next == NULL && \
+ bio_iter_last(_iter.bio, _iter.iter))
#ifndef ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE
# error "You should define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE for your platform"
diff --git a/mm/bounce.c b/mm/bounce.c
index c9f0a43..4525e3d 100644
--- a/mm/bounce.c
+++ b/mm/bounce.c
@@ -98,27 +98,24 @@ int init_emergency_isa_pool(void)
static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
{
unsigned char *vfrom;
- struct bio_vec *tovec, *fromvec;
- int i;
-
- bio_for_each_segment(tovec, to, i) {
- fromvec = from->bi_io_vec + i;
-
- /*
- * not bounced
- */
- if (tovec->bv_page == fromvec->bv_page)
- continue;
-
- /*
- * fromvec->bv_offset and fromvec->bv_len might have been
- * modified by the block layer, so use the original copy,
- * bounce_copy_vec already uses tovec->bv_len
- */
- vfrom = page_address(fromvec->bv_page) + tovec->bv_offset;
+ struct bio_vec tovec, *fromvec = from->bi_io_vec;
+ struct bvec_iter iter;
+
+ bio_for_each_segment(tovec, to, iter) {
+ if (tovec.bv_page != fromvec->bv_page) {
+ /*
+ * fromvec->bv_offset and fromvec->bv_len might have
+ * been modified by the block layer, so use the original
+ * copy, bounce_copy_vec already uses tovec->bv_len
+ */
+ vfrom = page_address(fromvec->bv_page) +
+ tovec.bv_offset;
+
+ bounce_copy_vec(&tovec, vfrom);
+ flush_dcache_page(tovec.bv_page);
+ }
- bounce_copy_vec(tovec, vfrom);
- flush_dcache_page(tovec->bv_page);
+ fromvec++;
}
}
@@ -201,11 +198,12 @@ static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
{
struct bio *bio;
int rw = bio_data_dir(*bio_orig);
- struct bio_vec *to, *from;
+ struct bio_vec *to, from;
+ struct bvec_iter iter;
unsigned i;
- bio_for_each_segment(from, *bio_orig, i)
- if (page_to_pfn(from->bv_page) > queue_bounce_pfn(q))
+ bio_for_each_segment(from, *bio_orig, iter)
+ if (page_to_pfn(from.bv_page) > queue_bounce_pfn(q))
goto bounce;
return;
--
1.8.4.rc1
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