diff options
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid5.c | 12 | ||||
| -rw-r--r-- | drivers/md/raid5.h | 3 |
2 files changed, 10 insertions, 5 deletions
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c index 76eed592371e..73cdf43a6479 100644 --- a/drivers/md/raid5.c +++ b/drivers/md/raid5.c @@ -318,6 +318,7 @@ static void init_stripe(struct stripe_head *sh, sector_t sector, int previous) remove_hash(sh); + sh->generation = conf->generation - previous; sh->disks = previous ? conf->previous_raid_disks : conf->raid_disks; sh->sector = sector; stripe_set_idx(sector, conf, previous, sh); @@ -341,7 +342,8 @@ static void init_stripe(struct stripe_head *sh, sector_t sector, int previous) insert_hash(conf, sh); } -static struct stripe_head *__find_stripe(raid5_conf_t *conf, sector_t sector, int disks) +static struct stripe_head *__find_stripe(raid5_conf_t *conf, sector_t sector, + short generation) { struct stripe_head *sh; struct hlist_node *hn; @@ -349,7 +351,7 @@ static struct stripe_head *__find_stripe(raid5_conf_t *conf, sector_t sector, in CHECK_DEVLOCK(); pr_debug("__find_stripe, sector %llu\n", (unsigned long long)sector); hlist_for_each_entry(sh, hn, stripe_hash(conf, sector), hash) - if (sh->sector == sector && sh->disks == disks) + if (sh->sector == sector && sh->generation == generation) return sh; pr_debug("__stripe %llu not in cache\n", (unsigned long long)sector); return NULL; @@ -363,7 +365,6 @@ get_active_stripe(raid5_conf_t *conf, sector_t sector, int previous, int noblock) { struct stripe_head *sh; - int disks = previous ? conf->previous_raid_disks : conf->raid_disks; pr_debug("get_stripe, sector %llu\n", (unsigned long long)sector); @@ -373,7 +374,7 @@ get_active_stripe(raid5_conf_t *conf, sector_t sector, wait_event_lock_irq(conf->wait_for_stripe, conf->quiesce == 0, conf->device_lock, /* nothing */); - sh = __find_stripe(conf, sector, disks); + sh = __find_stripe(conf, sector, conf->generation - previous); if (!sh) { if (!conf->inactive_blocked) sh = get_free_stripe(conf); @@ -3648,7 +3649,7 @@ static int make_request(struct request_queue *q, struct bio * bi) if ((mddev->delta_disks < 0 ? logical_sector >= conf->reshape_progress : logical_sector < conf->reshape_progress) - && disks == conf->previous_raid_disks) + && previous) /* mismatch, need to try again */ must_retry = 1; spin_unlock_irq(&conf->device_lock); @@ -4837,6 +4838,7 @@ static int raid5_start_reshape(mddev_t *mddev) else conf->reshape_progress = 0; conf->reshape_safe = conf->reshape_progress; + conf->generation++; spin_unlock_irq(&conf->device_lock); /* Add some new drives, as many as will fit. diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index b2edcc434e41..a081fb40a5a2 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -198,6 +198,8 @@ struct stripe_head { struct hlist_node hash; struct list_head lru; /* inactive_list or handle_list */ struct raid5_private_data *raid_conf; + short generation; /* increments with every + * reshape */ sector_t sector; /* sector of this row */ short pd_idx; /* parity disk index */ short qd_idx; /* 'Q' disk index for raid6 */ @@ -348,6 +350,7 @@ struct raid5_private_data { */ sector_t reshape_safe; int previous_raid_disks; + short generation; /* increments with every reshape */ struct list_head handle_list; /* stripes needing handling */ struct list_head hold_list; /* preread ready stripes */ |