From: Yu Kuai <[email protected]>
The new heleprs will be used in dm-raid in later patches to fix
regressions and prevent calling md_reap_sync_thread() directly.
Signed-off-by: Yu Kuai <[email protected]>
---
drivers/md/md.c | 29 +++++++++++++++++++++++++++++
drivers/md/md.h | 3 +++
2 files changed, 32 insertions(+)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 7156e765d027..5f6496cf43f5 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -4912,6 +4912,35 @@ static void stop_sync_thread(struct mddev *mddev, bool locked, bool check_seq)
mddev_lock_nointr(mddev);
}
+void md_idle_sync_thread(struct mddev *mddev)
+{
+ lockdep_assert_held(&mddev->reconfig_mutex);
+
+ clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+ stop_sync_thread(mddev, true, true);
+}
+EXPORT_SYMBOL_GPL(md_idle_sync_thread);
+
+void md_frozen_sync_thread(struct mddev *mddev)
+{
+ lockdep_assert_held(&mddev->reconfig_mutex);
+
+ set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+ stop_sync_thread(mddev, true, false);
+}
+EXPORT_SYMBOL_GPL(md_frozen_sync_thread);
+
+void md_unfrozen_sync_thread(struct mddev *mddev)
+{
+ lockdep_assert_held(&mddev->reconfig_mutex);
+
+ clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ md_wakeup_thread(mddev->thread);
+ sysfs_notify_dirent_safe(mddev->sysfs_action);
+}
+EXPORT_SYMBOL_GPL(md_unfrozen_sync_thread);
+
static void idle_sync_thread(struct mddev *mddev)
{
mutex_lock(&mddev->sync_mutex);
diff --git a/drivers/md/md.h b/drivers/md/md.h
index a079ee9b6190..a6d33f10b107 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -781,6 +781,9 @@ extern void md_rdev_clear(struct md_rdev *rdev);
extern void md_handle_request(struct mddev *mddev, struct bio *bio);
extern int mddev_suspend(struct mddev *mddev, bool interruptible);
extern void mddev_resume(struct mddev *mddev);
+extern void md_idle_sync_thread(struct mddev *mddev);
+extern void md_frozen_sync_thread(struct mddev *mddev);
+extern void md_unfrozen_sync_thread(struct mddev *mddev);
extern void md_reload_sb(struct mddev *mddev, int raid_disk);
extern void md_update_sb(struct mddev *mddev, int force);
--
2.39.2