[Ocfs2-devel] [PATCH 4/6] ocfs2: o2hb: add some user/debug log

[Eric Ren <zren@suse.com>]

Hi Junxiao,

On Wed, Jan 20, 2016 at 11:13:37AM +0800, Junxiao Bi wrote: 
> Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
> Reviewed-by: Ryan Ding <ryan.ding@oracle.com>
> ---
>  fs/ocfs2/cluster/heartbeat.c |   39 ++++++++++++++++++++++++++++++++-------
>  1 file changed, 32 insertions(+), 7 deletions(-)
> 
> diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
> index d5ef8dce08da..6c57fd21e597 100644
> --- a/fs/ocfs2/cluster/heartbeat.c
> +++ b/fs/ocfs2/cluster/heartbeat.c
> @@ -292,6 +292,8 @@ struct o2hb_bio_wait_ctxt {
>  	int               wc_error;
>  };
>  
> +#define O2HB_NEGO_TIMEOUT_MS (O2HB_MAX_WRITE_TIMEOUT_MS/2)
> +
>  enum {
>  	O2HB_NEGO_TIMEOUT_MSG = 1,
>  	O2HB_NEGO_APPROVE_MSG = 2,
> @@ -359,7 +361,7 @@ static void o2hb_arm_timeout(struct o2hb_region *reg)
>  	cancel_delayed_work(&reg->hr_nego_timeout_work);
>  	/* negotiate timeout must be less than write timeout. */
>  	schedule_delayed_work(&reg->hr_nego_timeout_work,
> -			      msecs_to_jiffies(O2HB_MAX_WRITE_TIMEOUT_MS)/2);
> +			      msecs_to_jiffies(O2HB_NEGO_TIMEOUT_MS));
>  	memset(reg->hr_nego_node_bitmap, 0, sizeof(reg->hr_nego_node_bitmap));
>  }
>  
> @@ -393,14 +395,19 @@ static void o2hb_nego_timeout(struct work_struct *work)
>  		container_of(work, struct o2hb_region,
>  			     hr_nego_timeout_work.work);
>  	unsigned long live_node_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
> -	int master_node, i;
> +	int master_node, i, ret;
>  
>  	o2hb_fill_node_map(live_node_bitmap, sizeof(live_node_bitmap));
>  	/* lowest node as master node to make negotiate decision. */
>  	master_node = find_next_bit(live_node_bitmap, O2NM_MAX_NODES, 0);
>  
>  	if (master_node == o2nm_this_node()) {
> -		set_bit(master_node, reg->hr_nego_node_bitmap);
> +		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",
> +				o2nm_this_node(), O2HB_NEGO_TIMEOUT_MS/1000,
> +				config_item_name(&reg->hr_item), reg->hr_dev_name);
> +			set_bit(master_node, reg->hr_nego_node_bitmap);
> +		}
>  		if (memcmp(reg->hr_nego_node_bitmap, live_node_bitmap,
>  				sizeof(reg->hr_nego_node_bitmap))) {
>  			/* check negotiate bitmap every second to do timeout
> @@ -412,6 +419,8 @@ 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);
>  		/* approve negotiate timeout request. */
>  		o2hb_arm_timeout(reg);
>  
> @@ -421,13 +430,23 @@ static void o2hb_nego_timeout(struct work_struct *work)
>  			if (i == master_node)
>  				continue;
>  
> -			o2hb_send_nego_msg(reg->hr_key,
> +			mlog(ML_HEARTBEAT, "send NEGO_APPROVE msg to node %d\n", i);
> +			ret = o2hb_send_nego_msg(reg->hr_key,
>  					O2HB_NEGO_APPROVE_MSG, i);
> +			if (ret)
> +				mlog(ML_ERROR, "send NEGO_APPROVE msg to node %d fail %d\n",
> +					i, ret);
>  		}
>  	} else {
>  		/* negotiate timeout with master node. */
> -		o2hb_send_nego_msg(reg->hr_key, O2HB_NEGO_TIMEOUT_MSG,
> -			master_node);
> +		printk(KERN_NOTICE "o2hb: node %d hb write hung for %ds on region %s (%s), 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);
> +		ret = o2hb_send_nego_msg(reg->hr_key, O2HB_NEGO_TIMEOUT_MSG,
> +				master_node);
> +		if (ret)
> +			mlog(ML_ERROR, "send NEGO_TIMEOUT msg to node %d fail %d\n",
> +				master_node, ret);
>  	}
>  }
>  
> @@ -438,6 +457,8 @@ 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);
>  	if (nego_msg->node_num < O2NM_MAX_NODES)
>  		set_bit(nego_msg->node_num, reg->hr_nego_node_bitmap);
>  	else
> @@ -449,7 +470,11 @@ static int o2hb_nego_timeout_handler(struct o2net_msg *msg, u32 len, void *data,
>  static int o2hb_nego_approve_handler(struct o2net_msg *msg, u32 len, void *data,
>  				void **ret_data)
>  {
> -	o2hb_arm_timeout((struct o2hb_region *)data);
> +	struct o2hb_region *reg = (struct o2hb_region *)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);
> +	o2hb_arm_timeout(reg);

Why mix the use of printk and mlog? Any rules to follow?

Thanks,
Eric

>  	return 0;
>  }
>  
> -- 
> 1.7.9.5
> 
> 
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