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Commit 54b5187b authored by Sunil Mushran's avatar Sunil Mushran
Browse files 


ocfs2/cluster: Add heartbeat mode configfs parameter

Add heartbeat mode parameter to the configfs tree. This will be used
to set/show the heartbeat mode. The user is free to toggle the mode
between local and global as long as there is no active heartbeat region.

Signed-off-by: default avatarSunil Mushran <sunil.mushran@oracle.com>
parent cb655d0f

fs/ocfs2/cluster/heartbeat.c

+72 −0
Original line number Diff line number Diff line
@@ -77,7 +77,19 @@ static struct o2hb_callback *hbcall_from_type(enum o2hb_callback_type type); 


#define O2HB_DEFAULT_BLOCK_BITS       9



enum o2hb_heartbeat_modes {

	O2HB_HEARTBEAT_LOCAL		= 0,

	O2HB_HEARTBEAT_GLOBAL,

	O2HB_HEARTBEAT_NUM_MODES,

};



char *o2hb_heartbeat_mode_desc[O2HB_HEARTBEAT_NUM_MODES] = {

		"local",	/* O2HB_HEARTBEAT_LOCAL */

		"global",	/* O2HB_HEARTBEAT_GLOBAL */

};



unsigned int o2hb_dead_threshold = O2HB_DEFAULT_DEAD_THRESHOLD;

unsigned int o2hb_heartbeat_mode = O2HB_HEARTBEAT_LOCAL;



/* Only sets a new threshold if there are no active regions.

 *
@@ -94,6 +106,22 @@ static void o2hb_dead_threshold_set(unsigned int threshold) 
	}

}



static int o2hb_global_hearbeat_mode_set(unsigned int hb_mode)

{

	int ret = -1;



	if (hb_mode < O2HB_HEARTBEAT_NUM_MODES) {

		spin_lock(&o2hb_live_lock);

		if (list_empty(&o2hb_all_regions)) {

			o2hb_heartbeat_mode = hb_mode;

			ret = 0;

		}

		spin_unlock(&o2hb_live_lock);

	}



	return ret;

}



struct o2hb_node_event {

	struct list_head        hn_item;

	enum o2hb_callback_type hn_event_type;
@@ -1688,6 +1716,41 @@ static ssize_t o2hb_heartbeat_group_threshold_store(struct o2hb_heartbeat_group 
	return count;

}



static

ssize_t o2hb_heartbeat_group_mode_show(struct o2hb_heartbeat_group *group,

				       char *page)

{

	return sprintf(page, "%s\n",

		       o2hb_heartbeat_mode_desc[o2hb_heartbeat_mode]);

}



static

ssize_t o2hb_heartbeat_group_mode_store(struct o2hb_heartbeat_group *group,

					const char *page, size_t count)

{

	unsigned int i;

	int ret;

	size_t len;



	len = (page[count - 1] == '\n') ? count - 1 : count;

	if (!len)

		return -EINVAL;



	for (i = 0; i < O2HB_HEARTBEAT_NUM_MODES; ++i) {

		if (strnicmp(page, o2hb_heartbeat_mode_desc[i], len))

			continue;



		ret = o2hb_global_hearbeat_mode_set(i);

		if (!ret)

			printk(KERN_NOTICE "ocfs2: Heartbeat mode set to %s\n",

			       o2hb_heartbeat_mode_desc[i]);

		return count;

	}



	return -EINVAL;



}



static struct o2hb_heartbeat_group_attribute o2hb_heartbeat_group_attr_threshold = {

	.attr	= { .ca_owner = THIS_MODULE,

		    .ca_name = "dead_threshold",
@@ -1696,8 +1759,17 @@ static struct o2hb_heartbeat_group_attribute o2hb_heartbeat_group_attr_threshold 
	.store	= o2hb_heartbeat_group_threshold_store,

};



static struct o2hb_heartbeat_group_attribute o2hb_heartbeat_group_attr_mode = {

	.attr   = { .ca_owner = THIS_MODULE,

		.ca_name = "mode",

		.ca_mode = S_IRUGO | S_IWUSR },

	.show   = o2hb_heartbeat_group_mode_show,

	.store  = o2hb_heartbeat_group_mode_store,

};



static struct configfs_attribute *o2hb_heartbeat_group_attrs[] = {

	&o2hb_heartbeat_group_attr_threshold.attr,

	&o2hb_heartbeat_group_attr_mode.attr,

	NULL,

};