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md: raid1/raid10: initialize bvec table via bio_add_page() 

We will support multipage bvec soon, so initialize bvec
table using the standardy way instead of writing the
talbe directly. Otherwise it won't work any more once
multipage bvec is enabled.

Acked-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Ming Lei 2017-07-14 16:14:43 +08:00 committed by Shaohua Li
parent 022e510fcb
commit fb0eb5df09
3 changed files with 27 additions and 16 deletions
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19
drivers/md/raid1-10.c Normal file
View File

@ -0,0 +1,19 @@
/* generally called after bio_reset() for reseting bvec */
static void md_bio_reset_resync_pages(struct bio *bio, struct resync_pages *rp,
int size)
{
int idx = 0;
/* initialize bvec table again */
do {
struct page *page = resync_fetch_page(rp, idx);
int len = min_t(int, size, PAGE_SIZE);
/*
* won't fail because the vec table is big
* enough to hold all these pages
*/
bio_add_page(bio, page, len, 0);
size -= len;
} while (idx++ < RESYNC_PAGES && size > 0);
}

18
drivers/md/raid1.c
View File

@ -81,6 +81,8 @@ static void lower_barrier(struct r1conf *conf, sector_t sector_nr);
#define raid1_log(md, fmt, args...) \
do { if ((md)->queue) blk_add_trace_msg((md)->queue, "raid1 " fmt, ##args); } while (0)
#include "raid1-10.c"
/*
* 'strct resync_pages' stores actual pages used for doing the resync
* IO, and it is per-bio, so make .bi_private points to it.
@ -2085,10 +2087,7 @@ static void process_checks(struct r1bio *r1_bio)
/* Fix variable parts of all bios */
vcnt = (r1_bio->sectors + PAGE_SIZE / 512 - 1) >> (PAGE_SHIFT - 9);
for (i = 0; i < conf->raid_disks * 2; i++) {
int j;
int size;
blk_status_t status;
struct bio_vec *bi;
struct bio *b = r1_bio->bios[i];
struct resync_pages *rp = get_resync_pages(b);
if (b->bi_end_io != end_sync_read)
@ -2097,8 +2096,6 @@ static void process_checks(struct r1bio *r1_bio)
status = b->bi_status;
bio_reset(b);
b->bi_status = status;
b->bi_vcnt = vcnt;
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;
@ -2106,15 +2103,8 @@ static void process_checks(struct r1bio *r1_bio)
rp->raid_bio = r1_bio;
b->bi_private = rp;
size = b->bi_iter.bi_size;
bio_for_each_segment_all(bi, b, j) {
bi->bv_offset = 0;
if (size > PAGE_SIZE)
bi->bv_len = PAGE_SIZE;
else
bi->bv_len = size;
size -= PAGE_SIZE;
}
/* initialize bvec table again */
md_bio_reset_resync_pages(b, rp, r1_bio->sectors << 9);
}
for (primary = 0; primary < conf->raid_disks * 2; primary++)
if (r1_bio->bios[primary]->bi_end_io == end_sync_read &&

6
drivers/md/raid10.c
View File

@ -110,6 +110,8 @@ static void end_reshape(struct r10conf *conf);
#define raid10_log(md, fmt, args...) \
do { if ((md)->queue) blk_add_trace_msg((md)->queue, "raid10 " fmt, ##args); } while (0)
#include "raid1-10.c"
/*
* 'strct resync_pages' stores actual pages used for doing the resync
* IO, and it is per-bio, so make .bi_private points to it.
@ -2086,8 +2088,8 @@ static void sync_request_write(struct mddev *mddev, struct r10bio *r10_bio)
rp = get_resync_pages(tbio);
bio_reset(tbio);
tbio->bi_vcnt = vcnt;
tbio->bi_iter.bi_size = fbio->bi_iter.bi_size;
md_bio_reset_resync_pages(tbio, rp, fbio->bi_iter.bi_size);
rp->raid_bio = r10_bio;
tbio->bi_private = rp;
tbio->bi_iter.bi_sector = r10_bio->devs[i].addr;