ocfs2/cluster: remove the hr_dev_name field from struct o2hb_region

Just print the block device name directly using the %pg format specifier.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Joel Becker <jlbec@evilplan.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Link: https://lore.kernel.org/r/20220713055317.1888500-8-hch@lst.deSigned-off-by: Jens Axboe <axboe@kernel.dk>

fs/ocfs2/cluster/heartbeat.c

@@ -235,8 +235,6 @@ struct o2hb_region {
 	 * (hr_steady_iterations == 0) within hr_unsteady_iterations */
 	atomic_t		hr_unsteady_iterations;
 
-	char			hr_dev_name[BDEVNAME_SIZE];
-
 	unsigned int		hr_timeout_ms;
 
 	/* randomized as the region goes up and down so that a node
@@ -287,8 +285,8 @@ static void o2hb_write_timeout(struct work_struct *work)
 		container_of(work, struct o2hb_region,
 			     hr_write_timeout_work.work);
 
-	mlog(ML_ERROR, "Heartbeat write timeout to device %s after %u "
-	     "milliseconds\n", reg->hr_dev_name,
+	mlog(ML_ERROR, "Heartbeat write timeout to device %pg after %u "
+	     "milliseconds\n", reg->hr_bdev,
 	     jiffies_to_msecs(jiffies - reg->hr_last_timeout_start));
 
 	if (o2hb_global_heartbeat_active()) {
@@ -383,9 +381,9 @@ static void o2hb_nego_timeout(struct work_struct *work)
 
 	if (master_node == o2nm_this_node()) {
 		if (!test_bit(master_node, reg->hr_nego_node_bitmap)) {
-			printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%s).\n",
+			printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%pg).\n",
 				o2nm_this_node(), O2HB_NEGO_TIMEOUT_MS/1000,
-				config_item_name(&reg->hr_item), reg->hr_dev_name);
+				config_item_name(&reg->hr_item), reg->hr_bdev);
 			set_bit(master_node, reg->hr_nego_node_bitmap);
 		}
 		if (memcmp(reg->hr_nego_node_bitmap, live_node_bitmap,
@@ -399,8 +397,8 @@ static void o2hb_nego_timeout(struct work_struct *work)
 			return;
 		}
 
-		printk(KERN_NOTICE "o2hb: all nodes hb write hung, maybe region %s (%s) is down.\n",
-			config_item_name(&reg->hr_item), reg->hr_dev_name);
+		printk(KERN_NOTICE "o2hb: all nodes hb write hung, maybe region %s (%pg) is down.\n",
+			config_item_name(&reg->hr_item), reg->hr_bdev);
 		/* approve negotiate timeout request. */
 		o2hb_arm_timeout(reg);
 
@@ -419,9 +417,9 @@ static void o2hb_nego_timeout(struct work_struct *work)
 		}
 	} else {
 		/* negotiate timeout with master node. */
-		printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%s), negotiate timeout with node %d.\n",
+		printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%pg), negotiate timeout with node %d.\n",
 			o2nm_this_node(), O2HB_NEGO_TIMEOUT_MS/1000, config_item_name(&reg->hr_item),
-			reg->hr_dev_name, master_node);
+			reg->hr_bdev, master_node);
 		ret = o2hb_send_nego_msg(reg->hr_key, O2HB_NEGO_TIMEOUT_MSG,
 				master_node);
 		if (ret)
@@ -437,8 +435,8 @@ static int o2hb_nego_timeout_handler(struct o2net_msg *msg, u32 len, void *data,
 	struct o2hb_nego_msg *nego_msg;
 
 	nego_msg = (struct o2hb_nego_msg *)msg->buf;
-	printk(KERN_NOTICE "o2hb: receive negotiate timeout message from node %d on region %s (%s).\n",
-		nego_msg->node_num, config_item_name(&reg->hr_item), reg->hr_dev_name);
+	printk(KERN_NOTICE "o2hb: receive negotiate timeout message from node %d on region %s (%pg).\n",
+		nego_msg->node_num, config_item_name(&reg->hr_item), reg->hr_bdev);
 	if (nego_msg->node_num < O2NM_MAX_NODES)
 		set_bit(nego_msg->node_num, reg->hr_nego_node_bitmap);
 	else
@@ -452,8 +450,8 @@ static int o2hb_nego_approve_handler(struct o2net_msg *msg, u32 len, void *data,
 {
 	struct o2hb_region *reg = data;
 
-	printk(KERN_NOTICE "o2hb: negotiate timeout approved by master node on region %s (%s).\n",
-		config_item_name(&reg->hr_item), reg->hr_dev_name);
+	printk(KERN_NOTICE "o2hb: negotiate timeout approved by master node on region %s (%pg).\n",
+		config_item_name(&reg->hr_item), reg->hr_bdev);
 	o2hb_arm_timeout(reg);
 	return 0;
 }
@@ -689,8 +687,8 @@ static int o2hb_check_own_slot(struct o2hb_region *reg)
 	else
 		errstr = ERRSTR3;
 
-	mlog(ML_ERROR, "%s (%s): expected(%u:0x%llx, 0x%llx), "
-	     "ondisk(%u:0x%llx, 0x%llx)\n", errstr, reg->hr_dev_name,
+	mlog(ML_ERROR, "%s (%pg): expected(%u:0x%llx, 0x%llx), "
+	     "ondisk(%u:0x%llx, 0x%llx)\n", errstr, reg->hr_bdev,
 	     slot->ds_node_num, (unsigned long long)slot->ds_last_generation,
 	     (unsigned long long)slot->ds_last_time, hb_block->hb_node,
 	     (unsigned long long)le64_to_cpu(hb_block->hb_generation),
@@ -863,8 +861,8 @@ static void o2hb_set_quorum_device(struct o2hb_region *reg)
 		   sizeof(o2hb_live_node_bitmap)))
 		goto unlock;
 
-	printk(KERN_NOTICE "o2hb: Region %s (%s) is now a quorum device\n",
-	       config_item_name(&reg->hr_item), reg->hr_dev_name);
+	printk(KERN_NOTICE "o2hb: Region %s (%pg) is now a quorum device\n",
+	       config_item_name(&reg->hr_item), reg->hr_bdev);
 
 	set_bit(reg->hr_region_num, o2hb_quorum_region_bitmap);
 
@@ -922,8 +920,8 @@ static int o2hb_check_slot(struct o2hb_region *reg,
 		/* The node is live but pushed out a bad crc. We
 		 * consider it a transient miss but don't populate any
 		 * other values as they may be junk. */
-		mlog(ML_ERROR, "Node %d has written a bad crc to %s\n",
-		     slot->ds_node_num, reg->hr_dev_name);
+		mlog(ML_ERROR, "Node %d has written a bad crc to %pg\n",
+		     slot->ds_node_num, reg->hr_bdev);
 		o2hb_dump_slot(hb_block);
 
 		slot->ds_equal_samples++;
@@ -1002,11 +1000,11 @@ static int o2hb_check_slot(struct o2hb_region *reg,
 		slot_dead_ms = le32_to_cpu(hb_block->hb_dead_ms);
 		if (slot_dead_ms && slot_dead_ms != dead_ms) {
 			/* TODO: Perhaps we can fail the region here. */
-			mlog(ML_ERROR, "Node %d on device %s has a dead count "
+			mlog(ML_ERROR, "Node %d on device %pg has a dead count "
 			     "of %u ms, but our count is %u ms.\n"
 			     "Please double check your configuration values "
 			     "for 'O2CB_HEARTBEAT_THRESHOLD'\n",
-			     slot->ds_node_num, reg->hr_dev_name, slot_dead_ms,
+			     slot->ds_node_num, reg->hr_bdev, slot_dead_ms,
 			     dead_ms);
 		}
 		goto out;
@@ -1145,8 +1143,8 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg)
 		/* Do not re-arm the write timeout on I/O error - we
 		 * can't be sure that the new block ever made it to
 		 * disk */
-		mlog(ML_ERROR, "Write error %d on device \"%s\"\n",
-		     write_wc.wc_error, reg->hr_dev_name);
+		mlog(ML_ERROR, "Write error %d on device \"%pg\"\n",
+		     write_wc.wc_error, reg->hr_bdev);
 		ret = write_wc.wc_error;
 		goto bail;
 	}
@@ -1170,9 +1168,9 @@ static int o2hb_do_disk_heartbeat(struct o2hb_region *reg)
 	if (atomic_read(&reg->hr_steady_iterations) != 0) {
 		if (atomic_dec_and_test(&reg->hr_unsteady_iterations)) {
 			printk(KERN_NOTICE "o2hb: Unable to stabilize "
-			       "heartbeat on region %s (%s)\n",
+			       "heartbeat on region %s (%pg)\n",
 			       config_item_name(&reg->hr_item),
-			       reg->hr_dev_name);
+			       reg->hr_bdev);
 			atomic_set(&reg->hr_steady_iterations, 0);
 			reg->hr_aborted_start = 1;
 			wake_up(&o2hb_steady_queue);
@@ -1494,7 +1492,7 @@ static void o2hb_region_release(struct config_item *item)
 	struct page *page;
 	struct o2hb_region *reg = to_o2hb_region(item);
 
-	mlog(ML_HEARTBEAT, "hb region release (%s)\n", reg->hr_dev_name);
+	mlog(ML_HEARTBEAT, "hb region release (%pg)\n", reg->hr_bdev);
 
 	kfree(reg->hr_tmp_block);
 
@@ -1641,7 +1639,7 @@ static ssize_t o2hb_region_dev_show(struct config_item *item, char *page)
 	unsigned int ret = 0;
 
 	if (to_o2hb_region(item)->hr_bdev)
-		ret = sprintf(page, "%s\n", to_o2hb_region(item)->hr_dev_name);
+		ret = sprintf(page, "%pg\n", to_o2hb_region(item)->hr_bdev);
 
 	return ret;
 }
@@ -1798,8 +1796,6 @@ static ssize_t o2hb_region_dev_store(struct config_item *item,
 		goto out2;
 	}
 
-	bdevname(reg->hr_bdev, reg->hr_dev_name);
-
 	sectsize = bdev_logical_block_size(reg->hr_bdev);
 	if (sectsize != reg->hr_block_bytes) {
 		mlog(ML_ERROR,
@@ -1895,8 +1891,8 @@ static ssize_t o2hb_region_dev_store(struct config_item *item,
 		ret = -EIO;
 
 	if (hb_task && o2hb_global_heartbeat_active())
-		printk(KERN_NOTICE "o2hb: Heartbeat started on region %s (%s)\n",
-		       config_item_name(&reg->hr_item), reg->hr_dev_name);
+		printk(KERN_NOTICE "o2hb: Heartbeat started on region %s (%pg)\n",
+		       config_item_name(&reg->hr_item), reg->hr_bdev);
 
 out3:
 	if (ret < 0) {
@@ -2088,10 +2084,10 @@ static void o2hb_heartbeat_group_drop_item(struct config_group *group,
 			quorum_region = 1;
 		clear_bit(reg->hr_region_num, o2hb_quorum_region_bitmap);
 		spin_unlock(&o2hb_live_lock);
-		printk(KERN_NOTICE "o2hb: Heartbeat %s on region %s (%s)\n",
+		printk(KERN_NOTICE "o2hb: Heartbeat %s on region %s (%pg)\n",
 		       ((atomic_read(&reg->hr_steady_iterations) == 0) ?
 			"stopped" : "start aborted"), config_item_name(item),
-		       reg->hr_dev_name);
+		       reg->hr_bdev);
 	}
 
 	/*