dm integrity: handle machine reboot in bitmap mode (1f5a7759) · Commits · 戴 / test

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 @@ clear_journal:
		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,

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