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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>
This commit is contained in:
Namhyung Kim 2011-07-18 17:38:47 +10:00 committed by NeilBrown
parent 2c4193df37
commit 778ca01852
1 changed files with 23 additions and 21 deletions
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44
drivers/md/raid10.c
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@ -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) {