tipc: add link set to new netlink api

Add TIPC_NL_LINK_SET to the new tipc netlink API.

This command can set one or more link properties for a particular
link.

Netlink logical layout of link set message:
-> link
    -> name
    -> properties
        [ -> tolerance ]
        [ -> priority ]
        [ -> window ]

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/uapi/linux/tipc_netlink.h b/include/uapi/linux/tipc_netlink.h
index 1034fb4..2deb7fd 100644 (file)
--- a/include/uapi/linux/tipc_netlink.h
+++ b/include/uapi/linux/tipc_netlink.h
@@ -48,6 +48,7 @@ enum {
        TIPC_NL_SOCK_GET,
        TIPC_NL_PUBL_GET,
        TIPC_NL_LINK_GET,
+       TIPC_NL_LINK_SET,
 
        __TIPC_NL_CMD_MAX,
        TIPC_NL_CMD_MAX = __TIPC_NL_CMD_MAX - 1

diff --git a/net/tipc/link.c b/net/tipc/link.c
index bdc4b5e..6785dcf 100644 (file)
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -2441,6 +2441,79 @@ int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[])
        return 0;
 }
 
+int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info)
+{
+       int err;
+       int res = 0;
+       int bearer_id;
+       char *name;
+       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;
+
+       name = nla_data(attrs[TIPC_NLA_LINK_NAME]);
+
+       node = tipc_link_find_owner(name, &bearer_id);
+       if (!node)
+               return -EINVAL;
+
+       tipc_node_lock(node);
+
+       link = node->links[bearer_id];
+       if (!link) {
+               res = -EINVAL;
+               goto out;
+       }
+
+       if (attrs[TIPC_NLA_LINK_PROP]) {
+               struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+               err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_LINK_PROP],
+                                             props);
+               if (err) {
+                       res = err;
+                       goto out;
+               }
+
+               if (props[TIPC_NLA_PROP_TOL]) {
+                       u32 tol;
+
+                       tol = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
+                       link_set_supervision_props(link, tol);
+                       tipc_link_proto_xmit(link, STATE_MSG, 0, 0, tol, 0, 0);
+               }
+               if (props[TIPC_NLA_PROP_PRIO]) {
+                       u32 prio;
+
+                       prio = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+                       link->priority = prio;
+                       tipc_link_proto_xmit(link, STATE_MSG, 0, 0, 0, prio, 0);
+               }
+               if (props[TIPC_NLA_PROP_WIN]) {
+                       u32 win;
+
+                       win = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+                       tipc_link_set_queue_limits(link, win);
+               }
+       }
+
+out:
+       tipc_node_unlock(node);
+
+       return res;
+}
 int __tipc_nl_add_stats(struct sk_buff *skb, struct tipc_stats *s)
 {
        int i;

diff --git a/net/tipc/link.h b/net/tipc/link.h
index 8e3542a..3738ba1 100644 (file)
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -242,6 +242,7 @@ 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_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
 
 /*

diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index ea168b8..d4444e5 100644 (file)
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -144,6 +144,11 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
                .doit   = tipc_nl_link_get,
                .dumpit = tipc_nl_link_dump,
                .policy = tipc_nl_policy,
+       },
+       {
+               .cmd    = TIPC_NL_LINK_SET,
+               .doit   = tipc_nl_link_set,
+               .policy = tipc_nl_policy,
        }
 };