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md: make sure everything is freed when dm-raid stops an array. 

md_stop() would stop an array, but not free various attached
data structures.
For internal arrays, these are freed later in do_md_stop() or
mddev_put(), but they don't apply for dm-raid arrays.
So get md_stop() to free them, and only all it from dm-raid.
For internal arrays we now call __md_stop.

Reported-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2012-11-19 10:47:48 +11:00
parent 35f9ac2dce
commit 5eff3c439d
1 changed files with 14 additions and 2 deletions
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16
drivers/md/md.c
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@ -5294,7 +5294,7 @@ void md_stop_writes(struct mddev *mddev)
} }
EXPORT_SYMBOL_GPL(md_stop_writes); EXPORT_SYMBOL_GPL(md_stop_writes);
void md_stop(struct mddev *mddev) static void __md_stop(struct mddev *mddev)
{ {
mddev->ready = 0; mddev->ready = 0;
mddev->pers->stop(mddev); mddev->pers->stop(mddev);
@ -5304,6 +5304,18 @@ void md_stop(struct mddev *mddev)
mddev->pers = NULL; mddev->pers = NULL;
clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery); clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
} }
void md_stop(struct mddev *mddev)
{
/* stop the array and free an attached data structures.
* This is called from dm-raid
*/
__md_stop(mddev);
bitmap_destroy(mddev);
if (mddev->bio_set)
bioset_free(mddev->bio_set);
}
EXPORT_SYMBOL_GPL(md_stop); EXPORT_SYMBOL_GPL(md_stop);
static int md_set_readonly(struct mddev *mddev, struct block_device *bdev) static int md_set_readonly(struct mddev *mddev, struct block_device *bdev)
@ -5364,7 +5376,7 @@ static int do_md_stop(struct mddev * mddev, int mode,
set_disk_ro(disk, 0); set_disk_ro(disk, 0);
__md_stop_writes(mddev); __md_stop_writes(mddev);
md_stop(mddev); __md_stop(mddev);
mddev->queue->merge_bvec_fn = NULL; mddev->queue->merge_bvec_fn = NULL;
mddev->queue->backing_dev_info.congested_fn = NULL; mddev->queue->backing_dev_info.congested_fn = NULL;