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| author | Kent Overstreet <koverstreet@google.com> | 2012-09-10 15:17:11 -0700 |
|---|---|---|
| committer | Kent Overstreet <koverstreet@google.com> | 2013-03-23 14:15:36 -0700 |
| commit | b783863f68c26c5411c50002f98a047a40b94e8e (patch) | |
| tree | c5543888aaf568704188da8c955d435a6fd1d2d7 /drivers/md/raid1.c | |
| parent | 2f6db2a7073452b123726e2baab1f37d511bf86d (diff) | |
| download | linux-b783863f68c26c5411c50002f98a047a40b94e8e.tar.gz linux-b783863f68c26c5411c50002f98a047a40b94e8e.tar.bz2 linux-b783863f68c26c5411c50002f98a047a40b94e8e.zip | |
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.c | 36 |
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; |