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Commit 6177b472 authored by NeilBrown's avatar NeilBrown
Browse files

md: start to refactor do_md_stop 



do_md_stop is large and clunky, so hard to understand.

This is a first step of refactoring, pulling two simple
sub-functions out.

Signed-off-by: default avatarNeilBrown <neilb@suse.de>
parent fe60b014

drivers/md/md.c

+55 −43
Original line number Diff line number Diff line
@@ -4568,6 +4568,58 @@ void restore_bitmap_write_access(struct file *file) 
	spin_unlock(&inode->i_lock);

}



static void md_clean(mddev_t *mddev)

{

	mddev->array_sectors = 0;

	mddev->external_size = 0;

	mddev->dev_sectors = 0;

	mddev->raid_disks = 0;

	mddev->recovery_cp = 0;

	mddev->resync_min = 0;

	mddev->resync_max = MaxSector;

	mddev->reshape_position = MaxSector;

	mddev->external = 0;

	mddev->persistent = 0;

	mddev->level = LEVEL_NONE;

	mddev->clevel[0] = 0;

	mddev->flags = 0;

	mddev->ro = 0;

	mddev->metadata_type[0] = 0;

	mddev->chunk_sectors = 0;

	mddev->ctime = mddev->utime = 0;

	mddev->layout = 0;

	mddev->max_disks = 0;

	mddev->events = 0;

	mddev->delta_disks = 0;

	mddev->new_level = LEVEL_NONE;

	mddev->new_layout = 0;

	mddev->new_chunk_sectors = 0;

	mddev->curr_resync = 0;

	mddev->resync_mismatches = 0;

	mddev->suspend_lo = mddev->suspend_hi = 0;

	mddev->sync_speed_min = mddev->sync_speed_max = 0;

	mddev->recovery = 0;

	mddev->in_sync = 0;

	mddev->degraded = 0;

	mddev->barriers_work = 0;

	mddev->safemode = 0;

	mddev->bitmap_info.offset = 0;

	mddev->bitmap_info.default_offset = 0;

	mddev->bitmap_info.chunksize = 0;

	mddev->bitmap_info.daemon_sleep = 0;

	mddev->bitmap_info.max_write_behind = 0;

}



static void md_stop(mddev_t *mddev)

{

	mddev->pers->stop(mddev);

	if (mddev->pers->sync_request && mddev->to_remove == NULL)

		mddev->to_remove = &md_redundancy_group;

	module_put(mddev->pers->owner);

	mddev->pers = NULL;



}



/* mode:

 *   0 - completely stop and dis-assemble array

 *   1 - switch to readonly
@@ -4608,14 +4660,11 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open) 
			if (mddev->ro)

				set_disk_ro(disk, 0);



			mddev->pers->stop(mddev);

			md_stop(mddev);

			mddev->queue->merge_bvec_fn = NULL;

			mddev->queue->unplug_fn = NULL;

			mddev->queue->backing_dev_info.congested_fn = NULL;

			module_put(mddev->pers->owner);

			if (mddev->pers->sync_request && mddev->to_remove == NULL)

				mddev->to_remove = &md_redundancy_group;

			mddev->pers = NULL;



			/* tell userspace to handle 'inactive' */

			sysfs_notify_dirent(mddev->sysfs_state);
@@ -4663,44 +4712,7 @@ out: 


		export_array(mddev);



		mddev->array_sectors = 0;

		mddev->external_size = 0;

		mddev->dev_sectors = 0;

		mddev->raid_disks = 0;

		mddev->recovery_cp = 0;

		mddev->resync_min = 0;

		mddev->resync_max = MaxSector;

		mddev->reshape_position = MaxSector;

		mddev->external = 0;

		mddev->persistent = 0;

		mddev->level = LEVEL_NONE;

		mddev->clevel[0] = 0;

		mddev->flags = 0;

		mddev->ro = 0;

		mddev->metadata_type[0] = 0;

		mddev->chunk_sectors = 0;

		mddev->ctime = mddev->utime = 0;

		mddev->layout = 0;

		mddev->max_disks = 0;

		mddev->events = 0;

		mddev->delta_disks = 0;

		mddev->new_level = LEVEL_NONE;

		mddev->new_layout = 0;

		mddev->new_chunk_sectors = 0;

		mddev->curr_resync = 0;

		mddev->resync_mismatches = 0;

		mddev->suspend_lo = mddev->suspend_hi = 0;

		mddev->sync_speed_min = mddev->sync_speed_max = 0;

		mddev->recovery = 0;

		mddev->in_sync = 0;

		mddev->degraded = 0;

		mddev->barriers_work = 0;

		mddev->safemode = 0;

		mddev->bitmap_info.offset = 0;

		mddev->bitmap_info.default_offset = 0;

		mddev->bitmap_info.chunksize = 0;

		mddev->bitmap_info.daemon_sleep = 0;

		mddev->bitmap_info.max_write_behind = 0;

		md_clean(mddev);

		kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);

		if (mddev->hold_active == UNTIL_STOP)

			mddev->hold_active = 0;