drbd: track details of bitmap IO

Track start and submit time of bitmap operations, and
add pending bitmap IO contexts to a new pending_bitmap_io list.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index c7a409f3aaf8..40c816ce8d75 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -777,6 +777,7 @@ struct drbd_peer_device {
 struct drbd_device {
 	struct drbd_resource *resource;
 	struct list_head peer_devices;
+	struct list_head pending_bitmap_io;
 	int vnr;			/* volume number within the connection */
 	struct kref kref;
 
@@ -918,6 +919,21 @@ struct drbd_device {
 	struct submit_worker submit;
 };
 
+struct drbd_bm_aio_ctx {
+	struct drbd_device *device;
+	struct list_head list; /* on device->pending_bitmap_io */;
+	unsigned long start_jif;
+	atomic_t in_flight;
+	unsigned int done;
+	unsigned flags;
+#define BM_AIO_COPY_PAGES	1
+#define BM_AIO_WRITE_HINTED	2
+#define BM_AIO_WRITE_ALL_PAGES	4
+#define BM_AIO_READ		8
+	int error;
+	struct kref kref;
+};
+
 struct drbd_config_context {
 	/* assigned from drbd_genlmsghdr */
 	unsigned int minor;