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md/raid5: Clear bad blocks on successful write. 

On a successful write to a known bad block, flag the sh
so that raid5d can remove the known bad block from the list.

Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2011-07-28 11:39:23 +10:00
parent 73e92e51b7
commit b84db560ea
2 changed files with 19 additions and 1 deletions
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19
drivers/md/raid5.c
View File

@ -1675,6 +1675,8 @@ static void raid5_end_write_request(struct bio *bi, int error)
raid5_conf_t *conf = sh->raid_conf;
int disks = sh->disks, i;
int uptodate = test_bit(BIO_UPTODATE, &bi->bi_flags);
sector_t first_bad;
int bad_sectors;
for (i=0 ; i<disks; i++)
if (bi == &sh->dev[i].req)
@ -1691,7 +1693,9 @@ static void raid5_end_write_request(struct bio *bi, int error)
if (!uptodate) {
set_bit(WriteErrorSeen, &conf->disks[i].rdev->flags);
set_bit(R5_WriteError, &sh->dev[i].flags);
}
} else if (is_badblock(conf->disks[i].rdev, sh->sector, STRIPE_SECTORS,
&first_bad, &bad_sectors))
set_bit(R5_MadeGood, &sh->dev[i].flags);
rdev_dec_pending(conf->disks[i].rdev, conf->mddev);
@ -3078,6 +3082,13 @@ static void analyse_stripe(struct stripe_head *sh, struct stripe_head_state *s)
} else
clear_bit(R5_WriteError, &dev->flags);
}
if (test_bit(R5_MadeGood, &dev->flags)) {
if (!test_bit(Faulty, &rdev->flags)) {
s->handle_bad_blocks = 1;
atomic_inc(&rdev->nr_pending);
} else
clear_bit(R5_MadeGood, &dev->flags);
}
if (!test_bit(R5_Insync, &dev->flags)) {
/* The ReadError flag will just be confusing now */
clear_bit(R5_ReadError, &dev->flags);
@ -3340,6 +3351,12 @@ finish:
md_error(conf->mddev, rdev);
rdev_dec_pending(rdev, conf->mddev);
}
if (test_and_clear_bit(R5_MadeGood, &dev->flags)) {
rdev = conf->disks[i].rdev;
rdev_clear_badblocks(rdev, sh->sector,
STRIPE_SECTORS);
rdev_dec_pending(rdev, conf->mddev);
}
}
if (s.ops_request)

1
drivers/md/raid5.h
View File

@ -274,6 +274,7 @@ struct stripe_head_state {
#define R5_Wantdrain 13 /* dev->towrite needs to be drained */
#define R5_WantFUA 14 /* Write should be FUA */
#define R5_WriteError 15 /* got a write error - need to record it */
#define R5_MadeGood 16 /* A bad block has been fixed by writing to it*/
/*
* Write method
*/