drbd: introduce the "initialized" activity log transaction type (85f103d8) · Commits · 戴 / test

drivers/block/drbd/drbd_actlog.c

+14 −2

Original line number	Diff line number	Diff line
		@@ -31,6 +31,11 @@
		#include "drbd_int.h"
		#include "drbd_wrappers.h"


		enum al_transaction_types {
		AL_TR_UPDATE = 0,
		AL_TR_INITIALIZED = 0xffff
		};
		/* all fields on disc in big endian */
		struct __packed al_transaction_on_disk {
		/* don't we all like magic */
		@@ -44,7 +49,8 @@ struct __packed al_transaction_on_disk {
		__be32 crc32c;

		/* type of transaction, special transaction types like:
		* purge-all, set-all-idle, set-all-active, ... to-be-defined */
		* purge-all, set-all-idle, set-all-active, ... to-be-defined
		* see also enum al_transaction_types */
		__be16 transaction_type;

		/* we currently allow only a few thousand extents,
		@@ -476,6 +482,7 @@ int drbd_al_read_log(struct drbd_conf mdev, struct drbd_backing_dev bdev)
		int active_extents = 0;
		int transactions = 0;
		int found_valid = 0;
		int found_initialized = 0;
		int from = 0;
		int to = 0;
		u32 from_tnr = 0;
		@@ -504,6 +511,10 @@ int drbd_al_read_log(struct drbd_conf mdev, struct drbd_backing_dev bdev)
		/* invalid data in that block */
		if (rv == 0)
		continue;
		if (be16_to_cpu(b->transaction_type) == AL_TR_INITIALIZED) {
		++found_initialized;
		continue;
		}

		/* IO error */
		if (rv == -1) {
		@@ -535,6 +546,7 @@ int drbd_al_read_log(struct drbd_conf mdev, struct drbd_backing_dev bdev)
		}

		if (!found_valid) {
		if (found_initialized != mx)
		dev_warn(DEV, "No usable activity log found.\n");
		mutex_unlock(&mdev->md_io_mutex);
		return 1;