diff options
| author | Jonathan Brassow <jbrassow@redhat.com> | 2011-06-07 17:50:35 -0500 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2011-06-08 15:11:31 +1000 |
| commit | 1ed7242e591af7e233234d483f12d33818b189d9 (patch) | |
| tree | 87d4a65cdb3510a97da7f2aefb9534839c49cfa4 /drivers/md | |
| parent | 0fd018af37dadbb7826850883ad8abfecdb1a00b (diff) | |
MD: raid1 changes to allow use by device mapper
MD RAID1: Changes to allow RAID1 to be used by device-mapper (dm-raid.c)
Added the necessary congestion function and conditionalize calls requiring an
array 'queue' or 'gendisk'.
Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid1.c | 24 | ||||
| -rw-r--r-- | drivers/md/raid1.h | 2 |
2 files changed, 19 insertions, 7 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 5d096096f958..f7431b6d8447 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -497,21 +497,19 @@ static int read_balance(conf_t *conf, r1bio_t *r1_bio) return best_disk; } -static int raid1_congested(void *data, int bits) +int md_raid1_congested(mddev_t *mddev, int bits) { - mddev_t *mddev = data; conf_t *conf = mddev->private; int i, ret = 0; - if (mddev_congested(mddev, bits)) - return 1; - rcu_read_lock(); for (i = 0; i < mddev->raid_disks; i++) { mdk_rdev_t *rdev = rcu_dereference(conf->mirrors[i].rdev); if (rdev && !test_bit(Faulty, &rdev->flags)) { struct request_queue *q = bdev_get_queue(rdev->bdev); + BUG_ON(!q); + /* Note the '|| 1' - when read_balance prefers * non-congested targets, it can be removed */ @@ -524,7 +522,15 @@ static int raid1_congested(void *data, int bits) rcu_read_unlock(); return ret; } +EXPORT_SYMBOL_GPL(md_raid1_congested); +static int raid1_congested(void *data, int bits) +{ + mddev_t *mddev = data; + + return mddev_congested(mddev, bits) || + md_raid1_congested(mddev, bits); +} static void flush_pending_writes(conf_t *conf) { @@ -1972,6 +1978,8 @@ static int run(mddev_t *mddev) return PTR_ERR(conf); list_for_each_entry(rdev, &mddev->disks, same_set) { + if (!mddev->gendisk) + continue; disk_stack_limits(mddev->gendisk, rdev->bdev, rdev->data_offset << 9); /* as we don't honour merge_bvec_fn, we must never risk @@ -2013,8 +2021,10 @@ static int run(mddev_t *mddev) md_set_array_sectors(mddev, raid1_size(mddev, 0, 0)); - mddev->queue->backing_dev_info.congested_fn = raid1_congested; - mddev->queue->backing_dev_info.congested_data = mddev; + if (mddev->queue) { + mddev->queue->backing_dev_info.congested_fn = raid1_congested; + mddev->queue->backing_dev_info.congested_data = mddev; + } return md_integrity_register(mddev); } diff --git a/drivers/md/raid1.h b/drivers/md/raid1.h index 5fc4ca1af863..e743a64fac4f 100644 --- a/drivers/md/raid1.h +++ b/drivers/md/raid1.h @@ -126,4 +126,6 @@ struct r1bio_s { */ #define R1BIO_Returned 6 +extern int md_raid1_congested(mddev_t *mddev, int bits); + #endif |