diff options
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 2d93ea127b82..7c9fb7dcf0d4 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5751,6 +5751,51 @@ static const struct kobj_type md_ktype = { int mdp_major = 0; +/* stack the limit for all rdevs into lim */ +void mddev_stack_rdev_limits(struct mddev *mddev, struct queue_limits *lim) +{ + struct md_rdev *rdev; + + rdev_for_each(rdev, mddev) { + queue_limits_stack_bdev(lim, rdev->bdev, rdev->data_offset, + mddev->gendisk->disk_name); + } +} +EXPORT_SYMBOL_GPL(mddev_stack_rdev_limits); + +/* apply the extra stacking limits from a new rdev into mddev */ +int mddev_stack_new_rdev(struct mddev *mddev, struct md_rdev *rdev) +{ + struct queue_limits lim; + + if (mddev_is_dm(mddev)) + return 0; + + lim = queue_limits_start_update(mddev->queue); + queue_limits_stack_bdev(&lim, rdev->bdev, rdev->data_offset, + mddev->gendisk->disk_name); + return queue_limits_commit_update(mddev->queue, &lim); +} +EXPORT_SYMBOL_GPL(mddev_stack_new_rdev); + +/* update the optimal I/O size after a reshape */ +void mddev_update_io_opt(struct mddev *mddev, unsigned int nr_stripes) +{ + struct queue_limits lim; + + if (mddev_is_dm(mddev)) + return; + + /* don't bother updating io_opt if we can't suspend the array */ + if (mddev_suspend(mddev, false) < 0) + return; + lim = queue_limits_start_update(mddev->gendisk->queue); + lim.io_opt = lim.io_min * nr_stripes; + queue_limits_commit_update(mddev->gendisk->queue, &lim); + mddev_resume(mddev); +} +EXPORT_SYMBOL_GPL(mddev_update_io_opt); + static void mddev_delayed_delete(struct work_struct *ws) { struct mddev *mddev = container_of(ws, struct mddev, del_work); |