When we are in bitmap mode, we need to clear the bitmap when we are
rebooting. This patch adds the reboot hook.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
---
drivers/md/dm-integrity.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
Index: linux-2.6/drivers/md/dm-integrity.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-integrity.c 2019-04-27 10:28:35.000000000 +0200
+++ linux-2.6/drivers/md/dm-integrity.c 2019-04-27 10:28:35.000000000 +0200
@@ -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 d
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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