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Commit ae36342b authored by Richard Alpe's avatar Richard Alpe Committed by David S. Miller
Browse files

tipc: add link stat reset to new netlink api 



Add TIPC_NL_LINK_RESET_STATS command to the new netlink API.

This command resets the link statistics for a particular link.

Netlink logical layout of link reset message:
-> link
    -> name

Signed-off-by: default avatarRichard Alpe <richard.alpe@ericsson.com>
Reviewed-by: default avatarErik Hugne <erik.hugne@ericsson.com>
Reviewed-by: default avatarJon Maloy <jon.maloy@ericsson.com>
Acked-by: default avatarYing Xue <ying.xue@windriver.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f96ce7a2

include/uapi/linux/tipc_netlink.h

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ enum { 
	TIPC_NL_PUBL_GET,

	TIPC_NL_LINK_GET,

	TIPC_NL_LINK_SET,

	TIPC_NL_LINK_RESET_STATS,



	__TIPC_NL_CMD_MAX,

	TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1

net/tipc/link.c

+49 −0
Original line number Diff line number Diff line
@@ -2783,3 +2783,52 @@ int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info) 


	return err;

}



int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info)

{

	int err;

	char *link_name;

	unsigned int bearer_id;

	struct tipc_link *link;

	struct tipc_node *node;

	struct nlattr *attrs[TIPC_NLA_LINK_MAX + 1];



	if (!info->attrs[TIPC_NLA_LINK])

		return -EINVAL;



	err = nla_parse_nested(attrs, TIPC_NLA_LINK_MAX,

			       info->attrs[TIPC_NLA_LINK],

			       tipc_nl_link_policy);

	if (err)

		return err;



	if (!attrs[TIPC_NLA_LINK_NAME])

		return -EINVAL;



	link_name = nla_data(attrs[TIPC_NLA_LINK_NAME]);



	if (strcmp(link_name, tipc_bclink_name) == 0) {

		err = tipc_bclink_reset_stats();

		if (err)

			return err;

		return 0;

	}



	node = tipc_link_find_owner(link_name, &bearer_id);

	if (!node)

		return -EINVAL;



	tipc_node_lock(node);



	link = node->links[bearer_id];

	if (!link) {

		tipc_node_unlock(node);

		return -EINVAL;

	}



	link_reset_statistics(link);



	tipc_node_unlock(node);



	return 0;

}

net/tipc/link.h

+1 −0
Original line number Diff line number Diff line
@@ -243,6 +243,7 @@ void tipc_link_retransmit(struct tipc_link *l_ptr, 
int tipc_nl_link_dump(struct sk_buff *skb, struct netlink_callback *cb);

int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info);

int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info);

int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info);

int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);



/*

net/tipc/netlink.c

+5 −0
Original line number Diff line number Diff line
@@ -149,6 +149,11 @@ static const struct genl_ops tipc_genl_v2_ops[] = { 
		.cmd	= TIPC_NL_LINK_SET,

		.doit	= tipc_nl_link_set,

		.policy = tipc_nl_policy,

	},

	{

		.cmd	= TIPC_NL_LINK_RESET_STATS,

		.doit   = tipc_nl_link_reset_stats,

		.policy = tipc_nl_policy,

	}

};