aboutsummaryrefslogtreecommitdiff
path: root/drivers/md
diff options
context:
space:
mode:
authorMikulas Patocka <mpatocka@redhat.com>2019-04-29 14:57:25 +0200
committerMike Snitzer <snitzer@redhat.com>2019-05-08 13:41:58 -0400
commit1f5a77591b13a302b60db0dcda57940f3e5d5214 (patch)
tree640db9609fc5046ff7f32ee71588efdbdcfba7d4 /drivers/md
parent468dfca38b1a6fbdccd195d875599cb7c8875cd9 (diff)
downloadlinux-1f5a77591b13a302b60db0dcda57940f3e5d5214.tar.gz
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: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-integrity.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 54b3fe1403a8..42be03bbfafa 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -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,