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Commit 1f5a7759 authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer
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dm integrity: handle machine reboot in bitmap mode 



When in bitmap mode the bitmap must be cleared when rebooting.  This
commit adds the reboot hook.

Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 468dfca3

drivers/md/dm-integrity.c

+24 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <linux/rbtree.h>

#include <linux/delay.h>

#include <linux/random.h>

#include <linux/reboot.h>

#include <crypto/hash.h>

#include <crypto/skcipher.h>

#include <linux/async_tx.h>
@@ -257,6 +258,8 @@ struct dm_integrity_c { 
	struct alg_spec journal_mac_alg;



	atomic64_t number_of_mismatches;



	struct notifier_block reboot_notifier;

};



struct dm_integrity_range {
@@ -2717,11 +2720,27 @@ static void replay_journal(struct dm_integrity_c *ic) 
		init_journal_node(&ic->journal_tree[i]);

}



static int dm_integrity_reboot(struct notifier_block *n, unsigned long code, void *x)

{

	struct dm_integrity_c *ic = container_of(n, struct dm_integrity_c, reboot_notifier);



	if (ic->mode == 'B') {

		DEBUG_print("dm_integrity_reboot\n");

		cancel_delayed_work_sync(&ic->bitmap_flush_work);

		queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, 0);

		flush_workqueue(ic->commit_wq);

	}



	return NOTIFY_DONE;

}



static void dm_integrity_postsuspend(struct dm_target *ti)

{

	struct dm_integrity_c *ic = (struct dm_integrity_c *)ti->private;

	int r;



	WARN_ON(unregister_reboot_notifier(&ic->reboot_notifier));



	del_timer_sync(&ic->autocommit_timer);



	WRITE_ONCE(ic->suspending, 1);
@@ -2829,6 +2848,11 @@ static void dm_integrity_resume(struct dm_target *ti) 
			recalc_write_super(ic);

		}

	}



	ic->reboot_notifier.notifier_call = dm_integrity_reboot;

	ic->reboot_notifier.next = NULL;

	ic->reboot_notifier.priority = INT_MAX - 1;	/* be notified after md and before hardware drivers */

	WARN_ON(register_reboot_notifier(&ic->reboot_notifier));

}



static void dm_integrity_status(struct dm_target *ti, status_type_t type,