blist = read_bio;
read_bio->bi_next = NULL;
+ rcu_read_lock();
for (s = 0; s < conf->copies*2; s++) {
struct bio *b;
int d = r10_bio->devs[s/2].devnum;
struct md_rdev *rdev2;
if (s&1) {
- rdev2 = conf->mirrors[d].replacement;
+ rdev2 = rcu_dereference(conf->mirrors[d].replacement);
b = r10_bio->devs[s/2].repl_bio;
} else {
- rdev2 = conf->mirrors[d].rdev;
+ rdev2 = rcu_dereference(conf->mirrors[d].rdev);
b = r10_bio->devs[s/2].bio;
}
if (!rdev2 || test_bit(Faulty, &rdev2->flags))
nr_sectors += len >> 9;
}
bio_full:
+ rcu_read_unlock();
r10_bio->sectors = nr_sectors;
/* Now submit the read */
struct bio *b;
int d = r10_bio->devs[s/2].devnum;
struct md_rdev *rdev;
+ rcu_read_lock();
if (s&1) {
- rdev = conf->mirrors[d].replacement;
+ rdev = rcu_dereference(conf->mirrors[d].replacement);
b = r10_bio->devs[s/2].repl_bio;
} else {
- rdev = conf->mirrors[d].rdev;
+ rdev = rcu_dereference(conf->mirrors[d].rdev);
b = r10_bio->devs[s/2].bio;
}
- if (!rdev || test_bit(Faulty, &rdev->flags))
+ if (!rdev || test_bit(Faulty, &rdev->flags)) {
+ rcu_read_unlock();
continue;
+ }
atomic_inc(&rdev->nr_pending);
+ rcu_read_unlock();
md_sync_acct(b->bi_bdev, r10_bio->sectors);
atomic_inc(&r10_bio->remaining);
b->bi_next = NULL;
if (s > (PAGE_SIZE >> 9))
s = PAGE_SIZE >> 9;
+ rcu_read_lock();
while (!success) {
int d = r10b->devs[slot].devnum;
- struct md_rdev *rdev = conf->mirrors[d].rdev;
+ struct md_rdev *rdev = rcu_dereference(conf->mirrors[d].rdev);
sector_t addr;
if (rdev == NULL ||
test_bit(Faulty, &rdev->flags) ||
goto failed;
addr = r10b->devs[slot].addr + idx * PAGE_SIZE;
+ atomic_inc(&rdev->nr_pending);
+ rcu_read_unlock();
success = sync_page_io(rdev,
addr,
s << 9,
bvec[idx].bv_page,
READ, false);
+ rdev_dec_pending(rdev, mddev);
+ rcu_read_lock();
if (success)
break;
failed:
if (slot == first_slot)
break;
}
+ rcu_read_unlock();
if (!success) {
/* couldn't read this block, must give up */
set_bit(MD_RECOVERY_INTR,
}
} else {
int d;
+ rcu_read_lock();
for (d = conf->geo.raid_disks ;
d < conf->geo.raid_disks - mddev->delta_disks;
d++) {
- struct md_rdev *rdev = conf->mirrors[d].rdev;
+ struct md_rdev *rdev = rcu_dereference(conf->mirrors[d].rdev);
if (rdev)
clear_bit(In_sync, &rdev->flags);
- rdev = conf->mirrors[d].replacement;
+ rdev = rcu_dereference(conf->mirrors[d].replacement);
if (rdev)
clear_bit(In_sync, &rdev->flags);
}
+ rcu_read_unlock();
}
mddev->layout = mddev->new_layout;
mddev->chunk_sectors = 1 << conf->geo.chunk_shift;