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authorKent Overstreet <koverstreet@google.com>2012-09-10 15:17:11 -0700
committerKent Overstreet <koverstreet@google.com>2013-03-23 14:15:36 -0700
commitb783863f68c26c5411c50002f98a047a40b94e8e (patch)
treec5543888aaf568704188da8c955d435a6fd1d2d7 /drivers/md/raid1.c
parent2f6db2a7073452b123726e2baab1f37d511bf86d (diff)
downloadlinux-b783863f68c26c5411c50002f98a047a40b94e8e.tar.bz2
raid1: Refactor narrow_write_error() to not use bi_idx
More bi_idx removal. This code was just open coding bio_clone(). This could probably be further improved by using bio_advance() instead of skipping over null pages, but that'd be a larger rework. Signed-off-by: Kent Overstreet <koverstreet@google.com> CC: Jens Axboe <axboe@kernel.dk> CC: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c36
1 files changed, 18 insertions, 18 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bb5ec7710c00..b36231866336 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2063,8 +2063,6 @@ static int narrow_write_error(struct r1bio *r1_bio, int i)
struct mddev *mddev = r1_bio->mddev;
struct r1conf *conf = mddev->private;
struct md_rdev *rdev = conf->mirrors[i].rdev;
- int vcnt, idx;
- struct bio_vec *vec;
/* bio has the data to be written to device 'i' where
* we just recently had a write error.
@@ -2092,30 +2090,32 @@ static int narrow_write_error(struct r1bio *r1_bio, int i)
& ~(sector_t)(block_sectors - 1))
- sector;
- if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
- vcnt = r1_bio->behind_page_count;
- vec = r1_bio->behind_bvecs;
- idx = 0;
- while (vec[idx].bv_page == NULL)
- idx++;
- } else {
- vcnt = r1_bio->master_bio->bi_vcnt;
- vec = r1_bio->master_bio->bi_io_vec;
- idx = r1_bio->master_bio->bi_idx;
- }
while (sect_to_write) {
struct bio *wbio;
if (sectors > sect_to_write)
sectors = sect_to_write;
/* Write at 'sector' for 'sectors'*/
- wbio = bio_alloc_mddev(GFP_NOIO, vcnt, mddev);
- memcpy(wbio->bi_io_vec, vec, vcnt * sizeof(struct bio_vec));
- wbio->bi_sector = r1_bio->sector;
+ if (test_bit(R1BIO_BehindIO, &r1_bio->state)) {
+ unsigned vcnt = r1_bio->behind_page_count;
+ struct bio_vec *vec = r1_bio->behind_bvecs;
+
+ while (!vec->bv_page) {
+ vec++;
+ vcnt--;
+ }
+
+ wbio = bio_alloc_mddev(GFP_NOIO, vcnt, mddev);
+ memcpy(wbio->bi_io_vec, vec, vcnt * sizeof(struct bio_vec));
+
+ wbio->bi_vcnt = vcnt;
+ } else {
+ wbio = bio_clone_mddev(r1_bio->master_bio, GFP_NOIO, mddev);
+ }
+
wbio->bi_rw = WRITE;
- wbio->bi_vcnt = vcnt;
+ wbio->bi_sector = r1_bio->sector;
wbio->bi_size = r1_bio->sectors << 9;
- wbio->bi_idx = idx;
md_trim_bio(wbio, sector - r1_bio->sector, sectors);
wbio->bi_sector += rdev->data_offset;