diff options
| author | Namhyung Kim <namhyung@gmail.com> | 2011-07-18 17:38:47 +1000 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-07-18 17:38:47 +1000 |
| commit | 778ca01852e6cc9ff335119b37a1938a978df384 (patch) | |
| tree | 845221188a1ffaafddac1041c8ced88ac9e6d8c2 /drivers/md/raid10.c | |
| parent | 2c4193df379bb89114ff60d4b0fa66131abe6a75 (diff) | |
| download | blackbird-obmc-linux-778ca01852e6cc9ff335119b37a1938a978df384.tar.gz blackbird-obmc-linux-778ca01852e6cc9ff335119b37a1938a978df384.zip | |
md/raid10: 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/raid10.c')
| -rw-r--r-- | drivers/md/raid10.c | 44 |
1 files changed, 23 insertions, 21 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index d55ae12b2d8c..e434f1e8d223 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -244,6 +244,23 @@ static inline void update_head_pos(int slot, r10bio_t *r10_bio) r10_bio->devs[slot].addr + (r10_bio->sectors); } +/* + * Find the disk number which triggered given bio + */ +static int find_bio_disk(conf_t *conf, r10bio_t *r10_bio, struct bio *bio) +{ + int slot; + + for (slot = 0; slot < conf->copies; slot++) + if (r10_bio->devs[slot].bio == bio) + break; + + BUG_ON(slot == conf->copies); + update_head_pos(slot, r10_bio); + + return r10_bio->devs[slot].devnum; +} + static void raid10_end_read_request(struct bio *bio, int error) { int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); @@ -289,13 +306,10 @@ static void raid10_end_write_request(struct bio *bio, int error) { int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); r10bio_t *r10_bio = bio->bi_private; - int slot, dev; + int dev; conf_t *conf = r10_bio->mddev->private; - for (slot = 0; slot < conf->copies; slot++) - if (r10_bio->devs[slot].bio == bio) - break; - dev = r10_bio->devs[slot].devnum; + dev = find_bio_disk(conf, r10_bio, bio); /* * this branch is our 'one mirror IO has finished' event handler: @@ -316,8 +330,6 @@ static void raid10_end_write_request(struct bio *bio, int error) */ set_bit(R10BIO_Uptodate, &r10_bio->state); - update_head_pos(slot, r10_bio); - /* * * Let's see if all mirrored write operations have finished @@ -1173,14 +1185,9 @@ static void end_sync_read(struct bio *bio, int error) { r10bio_t *r10_bio = bio->bi_private; conf_t *conf = r10_bio->mddev->private; - int i,d; + int d; - for (i=0; i<conf->copies; i++) - if (r10_bio->devs[i].bio == bio) - break; - BUG_ON(i == conf->copies); - update_head_pos(i, r10_bio); - d = r10_bio->devs[i].devnum; + d = find_bio_disk(conf, r10_bio, bio); if (test_bit(BIO_UPTODATE, &bio->bi_flags)) set_bit(R10BIO_Uptodate, &r10_bio->state); @@ -1211,18 +1218,13 @@ static void end_sync_write(struct bio *bio, int error) r10bio_t *r10_bio = bio->bi_private; mddev_t *mddev = r10_bio->mddev; conf_t *conf = mddev->private; - int i,d; + int d; - for (i = 0; i < conf->copies; i++) - if (r10_bio->devs[i].bio == bio) - break; - d = r10_bio->devs[i].devnum; + d = find_bio_disk(conf, r10_bio, bio); if (!uptodate) md_error(mddev, conf->mirrors[d].rdev); - update_head_pos(i, r10_bio); - rdev_dec_pending(conf->mirrors[d].rdev, mddev); while (atomic_dec_and_test(&r10_bio->remaining)) { if (r10_bio->master_bio == NULL) { |
