From 78acb1f9b898e85fa2c1e28e700b54b66b288e8d Mon Sep 17 00:00:00 2001 From: Erik Hugne Date: Thu, 24 Apr 2014 16:26:47 +0200 Subject: tipc: add ioctl to fetch link names We add a new ioctl for AF_TIPC that can be used to fetch the logical name for a link to a remote node on a given bearer. This should be used in combination with link state subscriptions. The logical name size limit definitions are moved to tipc.h, as they are now also needed by the new ioctl. Signed-off-by: Erik Hugne Reviewed-by: Ying Xue Reviewed-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/node.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'net/tipc/node.c') diff --git a/net/tipc/node.c b/net/tipc/node.c index 3b86a74cb31f..1f938f3dba4b 100644 --- a/net/tipc/node.c +++ b/net/tipc/node.c @@ -438,3 +438,30 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space) rcu_read_unlock(); return buf; } + +/** + * tipc_node_get_linkname - get the name of a link + * + * @bearer_id: id of the bearer + * @node: peer node address + * @linkname: link name output buffer + * + * Returns 0 on success + */ +int tipc_node_get_linkname(u32 bearer_id, u32 addr, char *linkname, size_t len) +{ + struct tipc_link *link; + struct tipc_node *node = tipc_node_find(addr); + + if ((bearer_id > MAX_BEARERS) || !node) + return -EINVAL; + tipc_node_lock(node); + link = node->links[bearer_id]; + if (link) { + strncpy(linkname, link->name, len); + tipc_node_unlock(node); + return 0; + } + tipc_node_unlock(node); + return -EINVAL; +} -- cgit v1.2.3