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| author | Namhyung Kim <namhyung@gmail.com> | 2011-10-07 14:22:53 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-10-07 14:22:53 +1100 |
| commit | ba3ae3bee317f0a5db813c026c8a8c113a4e40fb (patch) | |
| tree | 30a8c9d55afc32156973a3b1efb1cec94f4411d4 /drivers/md/raid1.c | |
| parent | e4f869d9de18bc8272df8d0ab764178aa24bdf33 (diff) | |
| download | blackbird-op-linux-ba3ae3bee317f0a5db813c026c8a8c113a4e40fb.tar.gz blackbird-op-linux-ba3ae3bee317f0a5db813c026c8a8c113a4e40fb.zip | |
md/raid1: factor out common bio handling code
When normal-write and sync-read/write bio completes, we should
find out the disk number the bio belongs to. Factor those common
code out to a separate function.
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 44 |
1 files changed, 24 insertions, 20 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index d9587dffe533..a0c02fb8af2a 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -268,6 +268,24 @@ static inline void update_head_pos(int disk, r1bio_t *r1_bio) r1_bio->sector + (r1_bio->sectors); } +/* + * Find the disk number which triggered given bio + */ +static int find_bio_disk(r1bio_t *r1_bio, struct bio *bio) +{ + int mirror; + int raid_disks = r1_bio->mddev->raid_disks; + + for (mirror = 0; mirror < raid_disks; mirror++) + if (r1_bio->bios[mirror] == bio) + break; + + BUG_ON(mirror == raid_disks); + update_head_pos(mirror, r1_bio); + + return mirror; +} + static void raid1_end_read_request(struct bio *bio, int error) { int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); @@ -361,10 +379,7 @@ static void raid1_end_write_request(struct bio *bio, int error) conf_t *conf = r1_bio->mddev->private; struct bio *to_put = NULL; - - for (mirror = 0; mirror < conf->raid_disks; mirror++) - if (r1_bio->bios[mirror] == bio) - break; + mirror = find_bio_disk(r1_bio, bio); /* * 'one mirror IO has finished' event handler: @@ -400,8 +415,6 @@ static void raid1_end_write_request(struct bio *bio, int error) } } - update_head_pos(mirror, r1_bio); - if (behind) { if (test_bit(WriteMostly, &conf->mirrors[mirror].rdev->flags)) atomic_dec(&r1_bio->behind_remaining); @@ -1344,13 +1357,10 @@ abort: static void end_sync_read(struct bio *bio, int error) { r1bio_t *r1_bio = bio->bi_private; - int i; - for (i=r1_bio->mddev->raid_disks; i--; ) - if (r1_bio->bios[i] == bio) - break; - BUG_ON(i < 0); - update_head_pos(i, r1_bio); + /* this will call update_head_pos() */ + find_bio_disk(r1_bio, bio); + /* * we have read a block, now it needs to be re-written, * or re-read if the read failed. @@ -1369,16 +1379,12 @@ static void end_sync_write(struct bio *bio, int error) r1bio_t *r1_bio = bio->bi_private; mddev_t *mddev = r1_bio->mddev; conf_t *conf = mddev->private; - int i; int mirror=0; sector_t first_bad; int bad_sectors; - for (i = 0; i < conf->raid_disks; i++) - if (r1_bio->bios[i] == bio) { - mirror = i; - break; - } + mirror = find_bio_disk(r1_bio, bio); + if (!uptodate) { sector_t sync_blocks = 0; sector_t s = r1_bio->sector; @@ -1404,8 +1410,6 @@ static void end_sync_write(struct bio *bio, int error) ) set_bit(R1BIO_MadeGood, &r1_bio->state); - update_head_pos(mirror, r1_bio); - if (atomic_dec_and_test(&r1_bio->remaining)) { int s = r1_bio->sectors; if (test_bit(R1BIO_MadeGood, &r1_bio->state) || |
