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authorKent Overstreet <kmo@daterainc.com>2013-10-11 15:44:27 -0700
committerKent Overstreet <kmo@daterainc.com>2013-11-23 22:33:47 -0800
commit4f024f3797c43cb4b73cd2c50cec728842d0e49e (patch)
tree3aedcab02d2ad723a189d01934d1e94fec7a54e1 /drivers/md/raid1.c
parented9c47bebeeea4a468b07cfd745c690190f8014c (diff)
downloadop-kernel-dev-4f024f3797c43cb4b73cd2c50cec728842d0e49e.zip
op-kernel-dev-4f024f3797c43cb4b73cd2c50cec728842d0e49e.tar.gz
block: Abstract out bvec iterator
Immutable biovecs are going to require an explicit iterator. To implement immutable bvecs, a later patch is going to add a bi_bvec_done member to this struct; for now, this patch effectively just renames things. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: "Ed L. Cashin" <ecashin@coraid.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Matthew Wilcox <willy@linux.intel.com> Cc: Geoff Levand <geoff@infradead.org> Cc: Yehuda Sadeh <yehuda@inktank.com> Cc: Sage Weil <sage@inktank.com> Cc: Alex Elder <elder@inktank.com> Cc: ceph-devel@vger.kernel.org Cc: Joshua Morris <josh.h.morris@us.ibm.com> Cc: Philip Kelleher <pjk1939@linux.vnet.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Neil Brown <neilb@suse.de> Cc: Alasdair Kergon <agk@redhat.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: dm-devel@redhat.com Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux390@de.ibm.com Cc: Boaz Harrosh <bharrosh@panasas.com> Cc: Benny Halevy <bhalevy@tonian.com> Cc: "James E.J. Bottomley" <JBottomley@parallels.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Chris Mason <chris.mason@fusionio.com> Cc: "Theodore Ts'o" <tytso@mit.edu> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Dave Kleikamp <shaggy@kernel.org> Cc: Joern Engel <joern@logfs.org> Cc: Prasad Joshi <prasadjoshi.linux@gmail.com> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: KONISHI Ryusuke <konishi.ryusuke@lab.ntt.co.jp> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Ben Myers <bpm@sgi.com> Cc: xfs@oss.sgi.com Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Len Brown <len.brown@intel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com> Cc: Ben Hutchings <ben@decadent.org.uk> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Guo Chao <yan@linux.vnet.ibm.com> Cc: Tejun Heo <tj@kernel.org> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Cc: "Roger Pau Monné" <roger.pau@citrix.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Ian Campbell <Ian.Campbell@citrix.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Minchan Kim <minchan@kernel.org> Cc: Jiang Liu <jiang.liu@huawei.com> Cc: Nitin Gupta <ngupta@vflare.org> Cc: Jerome Marchand <jmarchand@redhat.com> Cc: Joe Perches <joe@perches.com> Cc: Peng Tao <tao.peng@emc.com> Cc: Andy Adamson <andros@netapp.com> Cc: fanchaoting <fanchaoting@cn.fujitsu.com> Cc: Jie Liu <jeff.liu@oracle.com> Cc: Sunil Mushran <sunil.mushran@gmail.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Namjae Jeon <namjae.jeon@samsung.com> Cc: Pankaj Kumar <pankaj.km@samsung.com> Cc: Dan Magenheimer <dan.magenheimer@oracle.com> Cc: Mel Gorman <mgorman@suse.de>6
Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c75
1 files changed, 39 insertions, 36 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 1e5a540..db3b9d7 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -229,7 +229,7 @@ static void call_bio_endio(struct r1bio *r1_bio)
int done;
struct r1conf *conf = r1_bio->mddev->private;
sector_t start_next_window = r1_bio->start_next_window;
- sector_t bi_sector = bio->bi_sector;
+ sector_t bi_sector = bio->bi_iter.bi_sector;
if (bio->bi_phys_segments) {
unsigned long flags;
@@ -265,9 +265,8 @@ static void raid_end_bio_io(struct r1bio *r1_bio)
if (!test_and_set_bit(R1BIO_Returned, &r1_bio->state)) {
pr_debug("raid1: sync end %s on sectors %llu-%llu\n",
(bio_data_dir(bio) == WRITE) ? "write" : "read",
- (unsigned long long) bio->bi_sector,
- (unsigned long long) bio->bi_sector +
- bio_sectors(bio) - 1);
+ (unsigned long long) bio->bi_iter.bi_sector,
+ (unsigned long long) bio_end_sector(bio) - 1);
call_bio_endio(r1_bio);
}
@@ -466,9 +465,8 @@ static void raid1_end_write_request(struct bio *bio, int error)
struct bio *mbio = r1_bio->master_bio;
pr_debug("raid1: behind end write sectors"
" %llu-%llu\n",
- (unsigned long long) mbio->bi_sector,
- (unsigned long long) mbio->bi_sector +
- bio_sectors(mbio) - 1);
+ (unsigned long long) mbio->bi_iter.bi_sector,
+ (unsigned long long) bio_end_sector(mbio) - 1);
call_bio_endio(r1_bio);
}
}
@@ -875,7 +873,7 @@ static bool need_to_wait_for_sync(struct r1conf *conf, struct bio *bio)
else if ((conf->next_resync - RESYNC_WINDOW_SECTORS
>= bio_end_sector(bio)) ||
(conf->next_resync + NEXT_NORMALIO_DISTANCE
- <= bio->bi_sector))
+ <= bio->bi_iter.bi_sector))
wait = false;
else
wait = true;
@@ -913,19 +911,19 @@ static sector_t wait_barrier(struct r1conf *conf, struct bio *bio)
if (bio && bio_data_dir(bio) == WRITE) {
if (conf->next_resync + NEXT_NORMALIO_DISTANCE
- <= bio->bi_sector) {
+ <= bio->bi_iter.bi_sector) {
if (conf->start_next_window == MaxSector)
conf->start_next_window =
conf->next_resync +
NEXT_NORMALIO_DISTANCE;
if ((conf->start_next_window + NEXT_NORMALIO_DISTANCE)
- <= bio->bi_sector)
+ <= bio->bi_iter.bi_sector)
conf->next_window_requests++;
else
conf->current_window_requests++;
}
- if (bio->bi_sector >= conf->start_next_window)
+ if (bio->bi_iter.bi_sector >= conf->start_next_window)
sector = conf->start_next_window;
}
@@ -1028,7 +1026,8 @@ do_sync_io:
if (bvecs[i].bv_page)
put_page(bvecs[i].bv_page);
kfree(bvecs);
- pr_debug("%dB behind alloc failed, doing sync I/O\n", bio->bi_size);
+ pr_debug("%dB behind alloc failed, doing sync I/O\n",
+ bio->bi_iter.bi_size);
}
struct raid1_plug_cb {
@@ -1108,7 +1107,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
if (bio_data_dir(bio) == WRITE &&
bio_end_sector(bio) > mddev->suspend_lo &&
- bio->bi_sector < mddev->suspend_hi) {
+ bio->bi_iter.bi_sector < mddev->suspend_hi) {
/* As the suspend_* range is controlled by
* userspace, we want an interruptible
* wait.
@@ -1119,7 +1118,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
prepare_to_wait(&conf->wait_barrier,
&w, TASK_INTERRUPTIBLE);
if (bio_end_sector(bio) <= mddev->suspend_lo ||
- bio->bi_sector >= mddev->suspend_hi)
+ bio->bi_iter.bi_sector >= mddev->suspend_hi)
break;
schedule();
}
@@ -1141,7 +1140,7 @@ static void make_request(struct mddev *mddev, struct bio * bio)
r1_bio->sectors = bio_sectors(bio);
r1_bio->state = 0;
r1_bio->mddev = mddev;
- r1_bio->sector = bio->bi_sector;
+ r1_bio->sector = bio->bi_iter.bi_sector;
/* We might need to issue multiple reads to different
* devices if there are bad blocks around, so we keep
@@ -1181,12 +1180,13 @@ read_again:
r1_bio->read_disk = rdisk;
read_bio = bio_clone_mddev(bio, GFP_NOIO, mddev);
- bio_trim(read_bio, r1_bio->sector - bio->bi_sector,
+ bio_trim(read_bio, r1_bio->sector - bio->bi_iter.bi_sector,
max_sectors);
r1_bio->bios[rdisk] = read_bio;
- read_bio->bi_sector = r1_bio->sector + mirror->rdev->data_offset;
+ read_bio->bi_iter.bi_sector = r1_bio->sector +
+ mirror->rdev->data_offset;
read_bio->bi_bdev = mirror->rdev->bdev;
read_bio->bi_end_io = raid1_end_read_request;
read_bio->bi_rw = READ | do_sync;
@@ -1198,7 +1198,7 @@ read_again:
*/
sectors_handled = (r1_bio->sector + max_sectors
- - bio->bi_sector);
+ - bio->bi_iter.bi_sector);
r1_bio->sectors = max_sectors;
spin_lock_irq(&conf->device_lock);
if (bio->bi_phys_segments == 0)
@@ -1219,7 +1219,8 @@ read_again:
r1_bio->sectors = bio_sectors(bio) - sectors_handled;
r1_bio->state = 0;
r1_bio->mddev = mddev;
- r1_bio->sector = bio->bi_sector + sectors_handled;
+ r1_bio->sector = bio->bi_iter.bi_sector +
+ sectors_handled;
goto read_again;
} else
generic_make_request(read_bio);
@@ -1322,7 +1323,7 @@ read_again:
if (r1_bio->bios[j])
rdev_dec_pending(conf->mirrors[j].rdev, mddev);
r1_bio->state = 0;
- allow_barrier(conf, start_next_window, bio->bi_sector);
+ allow_barrier(conf, start_next_window, bio->bi_iter.bi_sector);
md_wait_for_blocked_rdev(blocked_rdev, mddev);
start_next_window = wait_barrier(conf, bio);
/*
@@ -1349,7 +1350,7 @@ read_again:
bio->bi_phys_segments++;
spin_unlock_irq(&conf->device_lock);
}
- sectors_handled = r1_bio->sector + max_sectors - bio->bi_sector;
+ sectors_handled = r1_bio->sector + max_sectors - bio->bi_iter.bi_sector;
atomic_set(&r1_bio->remaining, 1);
atomic_set(&r1_bio->behind_remaining, 0);
@@ -1361,7 +1362,7 @@ read_again:
continue;
mbio = bio_clone_mddev(bio, GFP_NOIO, mddev);
- bio_trim(mbio, r1_bio->sector - bio->bi_sector, max_sectors);
+ bio_trim(mbio, r1_bio->sector - bio->bi_iter.bi_sector, max_sectors);
if (first_clone) {
/* do behind I/O ?
@@ -1395,7 +1396,7 @@ read_again:
r1_bio->bios[i] = mbio;
- mbio->bi_sector = (r1_bio->sector +
+ mbio->bi_iter.bi_sector = (r1_bio->sector +
conf->mirrors[i].rdev->data_offset);
mbio->bi_bdev = conf->mirrors[i].rdev->bdev;
mbio->bi_end_io = raid1_end_write_request;
@@ -1435,7 +1436,7 @@ read_again:
r1_bio->sectors = bio_sectors(bio) - sectors_handled;
r1_bio->state = 0;
r1_bio->mddev = mddev;
- r1_bio->sector = bio->bi_sector + sectors_handled;
+ r1_bio->sector = bio->bi_iter.bi_sector + sectors_handled;
goto retry_write;
}
@@ -1959,14 +1960,14 @@ static int process_checks(struct r1bio *r1_bio)
/* fixup the bio for reuse */
bio_reset(b);
b->bi_vcnt = vcnt;
- b->bi_size = r1_bio->sectors << 9;
- b->bi_sector = r1_bio->sector +
+ b->bi_iter.bi_size = r1_bio->sectors << 9;
+ b->bi_iter.bi_sector = r1_bio->sector +
conf->mirrors[i].rdev->data_offset;
b->bi_bdev = conf->mirrors[i].rdev->bdev;
b->bi_end_io = end_sync_read;
b->bi_private = r1_bio;
- size = b->bi_size;
+ size = b->bi_iter.bi_size;
for (j = 0; j < vcnt ; j++) {
struct bio_vec *bi;
bi = &b->bi_io_vec[j];
@@ -2221,11 +2222,11 @@ static int narrow_write_error(struct r1bio *r1_bio, int i)
}
wbio->bi_rw = WRITE;
- wbio->bi_sector = r1_bio->sector;
- wbio->bi_size = r1_bio->sectors << 9;
+ wbio->bi_iter.bi_sector = r1_bio->sector;
+ wbio->bi_iter.bi_size = r1_bio->sectors << 9;
bio_trim(wbio, sector - r1_bio->sector, sectors);
- wbio->bi_sector += rdev->data_offset;
+ wbio->bi_iter.bi_sector += rdev->data_offset;
wbio->bi_bdev = rdev->bdev;
if (submit_bio_wait(WRITE, wbio) == 0)
/* failure! */
@@ -2339,7 +2340,8 @@ read_more:
}
r1_bio->read_disk = disk;
bio = bio_clone_mddev(r1_bio->master_bio, GFP_NOIO, mddev);
- bio_trim(bio, r1_bio->sector - bio->bi_sector, max_sectors);
+ bio_trim(bio, r1_bio->sector - bio->bi_iter.bi_sector,
+ max_sectors);
r1_bio->bios[r1_bio->read_disk] = bio;
rdev = conf->mirrors[disk].rdev;
printk_ratelimited(KERN_ERR
@@ -2348,7 +2350,7 @@ read_more:
mdname(mddev),
(unsigned long long)r1_bio->sector,
bdevname(rdev->bdev, b));
- bio->bi_sector = r1_bio->sector + rdev->data_offset;
+ bio->bi_iter.bi_sector = r1_bio->sector + rdev->data_offset;
bio->bi_bdev = rdev->bdev;
bio->bi_end_io = raid1_end_read_request;
bio->bi_rw = READ | do_sync;
@@ -2357,7 +2359,7 @@ read_more:
/* Drat - have to split this up more */
struct bio *mbio = r1_bio->master_bio;
int sectors_handled = (r1_bio->sector + max_sectors
- - mbio->bi_sector);
+ - mbio->bi_iter.bi_sector);
r1_bio->sectors = max_sectors;
spin_lock_irq(&conf->device_lock);
if (mbio->bi_phys_segments == 0)
@@ -2375,7 +2377,8 @@ read_more:
r1_bio->state = 0;
set_bit(R1BIO_ReadError, &r1_bio->state);
r1_bio->mddev = mddev;
- r1_bio->sector = mbio->bi_sector + sectors_handled;
+ r1_bio->sector = mbio->bi_iter.bi_sector +
+ sectors_handled;
goto read_more;
} else
@@ -2599,7 +2602,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp
}
if (bio->bi_end_io) {
atomic_inc(&rdev->nr_pending);
- bio->bi_sector = sector_nr + rdev->data_offset;
+ bio->bi_iter.bi_sector = sector_nr + rdev->data_offset;
bio->bi_bdev = rdev->bdev;
bio->bi_private = r1_bio;
}
@@ -2699,7 +2702,7 @@ static sector_t sync_request(struct mddev *mddev, sector_t sector_nr, int *skipp
continue;
/* remove last page from this bio */
bio->bi_vcnt--;
- bio->bi_size -= len;
+ bio->bi_iter.bi_size -= len;
bio->bi_flags &= ~(1<< BIO_SEG_VALID);
}
goto bio_full;
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