tipc: add media set to new netlink api

Add TIPC_NL_MEDIA_SET command to the new tipc netlink API.

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

Netlink logical layout of bearer set message:
-> media
    -> name
    -> link 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>

3 files changed, 53 insertions, 0 deletions

diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 26630a51fcae..5f6f32369c16 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -1023,3 +1023,50 @@ err_out:
 
         return err;
 }
+
+int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info)
+{
+        int err;
+        char *name;
+        struct tipc_media *m;
+        struct nlattr *attrs[TIPC_NLA_BEARER_MAX + 1];
+
+        if (!info->attrs[TIPC_NLA_MEDIA])
+                return -EINVAL;
+
+        err = nla_parse_nested(attrs, TIPC_NLA_MEDIA_MAX,
+                               info->attrs[TIPC_NLA_MEDIA],
+                               tipc_nl_media_policy);
+
+        if (!attrs[TIPC_NLA_MEDIA_NAME])
+                return -EINVAL;
+        name = nla_data(attrs[TIPC_NLA_MEDIA_NAME]);
+
+        rtnl_lock();
+        m = tipc_media_find(name);
+        if (!m) {
+                rtnl_unlock();
+                return -EINVAL;
+        }
+
+        if (attrs[TIPC_NLA_MEDIA_PROP]) {
+                struct nlattr *props[TIPC_NLA_PROP_MAX + 1];
+
+                err = tipc_nl_parse_link_prop(attrs[TIPC_NLA_MEDIA_PROP],
+                                              props);
+                if (err) {
+                        rtnl_unlock();
+                        return err;
+                }
+
+                if (props[TIPC_NLA_PROP_TOL])
+                        m->tolerance = nla_get_u32(props[TIPC_NLA_PROP_TOL]);
+                if (props[TIPC_NLA_PROP_PRIO])
+                        m->priority = nla_get_u32(props[TIPC_NLA_PROP_PRIO]);
+                if (props[TIPC_NLA_PROP_WIN])
+                        m->window = nla_get_u32(props[TIPC_NLA_PROP_WIN]);
+        }
+        rtnl_unlock();
+
+        return 0;
+}
diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h
index bacd225bccfb..b1d905209e83 100644
--- a/net/tipc/bearer.h
+++ b/net/tipc/bearer.h
@@ -186,6 +186,7 @@ int tipc_nl_bearer_set(struct sk_buff *skb, struct genl_info *info);
 
 int tipc_nl_media_dump(struct sk_buff *skb, struct netlink_callback *cb);
 int tipc_nl_media_get(struct sk_buff *skb, struct genl_info *info);
+int tipc_nl_media_set(struct sk_buff *skb, struct genl_info *info);
 
 int tipc_media_set_priority(const char *name, u32 new_value);
 int tipc_media_set_window(const char *name, u32 new_value);
diff --git a/net/tipc/netlink.c b/net/tipc/netlink.c
index 742e51a0afbb..8673e370b7ed 100644
--- a/net/tipc/netlink.c
+++ b/net/tipc/netlink.c
@@ -161,6 +161,11 @@ static const struct genl_ops tipc_genl_v2_ops[] = {
                 .doit   = tipc_nl_media_get,
                 .dumpit = tipc_nl_media_dump,
                 .policy = tipc_nl_policy,
+        },
+        {
+                .cmd    = TIPC_NL_MEDIA_SET,
+                .doit   = tipc_nl_media_set,
+                .policy = tipc_nl_policy,
         }
 };