md: export md_is_rdwr() and is_md_suspended()

The two apis will be used later to fix a deadlock in raid456, there are
no functional changes.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230512015610.821290-4-yukuai1@huaweicloud.com

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/md/md.h b/drivers/md/md.h
index fd8f260ed5f8..da173d6bf726 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -555,6 +555,23 @@ enum recovery_flags {
 	MD_RESYNCING_REMOTE,	/* remote node is running resync thread */
 };
 
+enum md_ro_state {
+	MD_RDWR,
+	MD_RDONLY,
+	MD_AUTO_READ,
+	MD_MAX_STATE
+};
+
+static inline bool md_is_rdwr(struct mddev *mddev)
+{
+	return (mddev->ro == MD_RDWR);
+}
+
+static inline bool is_md_suspended(struct mddev *mddev)
+{
+	return percpu_ref_is_dying(&mddev->active_io);
+}
+
 static inline int __must_check mddev_lock(struct mddev *mddev)
 {
 	return mutex_lock_interruptible(&mddev->reconfig_mutex);