Linux-libre 4.2-gnu

1 files changed, 114 insertions, 23 deletions

diff --git a/net/tipc/netlink_compat.c b/net/tipc/netlink_compat.c
index ce9121e8e..53e0fee80 100644
--- a/net/tipc/netlink_compat.c
+++ b/net/tipc/netlink_compat.c
@@ -55,6 +55,7 @@ struct tipc_nl_compat_msg {
 	int rep_type;
 	int rep_size;
 	int req_type;
+	struct net *net;
 	struct sk_buff *rep;
 	struct tlv_desc *req;
 	struct sock *dst_sk;
@@ -68,7 +69,8 @@ struct tipc_nl_compat_cmd_dump {
 
 struct tipc_nl_compat_cmd_doit {
 	int (*doit)(struct sk_buff *skb, struct genl_info *info);
-	int (*transcode)(struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
+	int (*transcode)(struct tipc_nl_compat_cmd_doit *cmd,
+			 struct sk_buff *skb, struct tipc_nl_compat_msg *msg);
 };
 
 static int tipc_skb_tailroom(struct sk_buff *skb)
@@ -281,7 +283,7 @@ static int __tipc_nl_compat_doit(struct tipc_nl_compat_cmd_doit *cmd,
 	if (!trans_buf)
 		return -ENOMEM;
 
-	err = (*cmd->transcode)(trans_buf, msg);
+	err = (*cmd->transcode)(cmd, trans_buf, msg);
 	if (err)
 		goto trans_out;
 
@@ -353,7 +355,8 @@ static int tipc_nl_compat_bearer_dump(struct tipc_nl_compat_msg *msg,
 			    nla_len(bearer[TIPC_NLA_BEARER_NAME]));
 }
 
-static int tipc_nl_compat_bearer_enable(struct sk_buff *skb,
+static int tipc_nl_compat_bearer_enable(struct tipc_nl_compat_cmd_doit *cmd,
+					struct sk_buff *skb,
 					struct tipc_nl_compat_msg *msg)
 {
 	struct nlattr *prop;
@@ -385,7 +388,8 @@ static int tipc_nl_compat_bearer_enable(struct sk_buff *skb,
 	return 0;
 }
 
-static int tipc_nl_compat_bearer_disable(struct sk_buff *skb,
+static int tipc_nl_compat_bearer_disable(struct tipc_nl_compat_cmd_doit *cmd,
+					 struct sk_buff *skb,
 					 struct tipc_nl_compat_msg *msg)
 {
 	char *name;
@@ -576,11 +580,81 @@ static int tipc_nl_compat_link_dump(struct tipc_nl_compat_msg *msg,
 			    &link_info, sizeof(link_info));
 }
 
-static int tipc_nl_compat_link_set(struct sk_buff *skb,
-				   struct tipc_nl_compat_msg *msg)
+static int __tipc_add_link_prop(struct sk_buff *skb,
+				struct tipc_nl_compat_msg *msg,
+				struct tipc_link_config *lc)
+{
+	switch (msg->cmd) {
+	case TIPC_CMD_SET_LINK_PRI:
+		return nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value));
+	case TIPC_CMD_SET_LINK_TOL:
+		return nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value));
+	case TIPC_CMD_SET_LINK_WINDOW:
+		return nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value));
+	}
+
+	return -EINVAL;
+}
+
+static int tipc_nl_compat_media_set(struct sk_buff *skb,
+				    struct tipc_nl_compat_msg *msg)
 {
-	struct nlattr *link;
 	struct nlattr *prop;
+	struct nlattr *media;
+	struct tipc_link_config *lc;
+
+	lc = (struct tipc_link_config *)TLV_DATA(msg->req);
+
+	media = nla_nest_start(skb, TIPC_NLA_MEDIA);
+	if (!media)
+		return -EMSGSIZE;
+
+	if (nla_put_string(skb, TIPC_NLA_MEDIA_NAME, lc->name))
+		return -EMSGSIZE;
+
+	prop = nla_nest_start(skb, TIPC_NLA_MEDIA_PROP);
+	if (!prop)
+		return -EMSGSIZE;
+
+	__tipc_add_link_prop(skb, msg, lc);
+	nla_nest_end(skb, prop);
+	nla_nest_end(skb, media);
+
+	return 0;
+}
+
+static int tipc_nl_compat_bearer_set(struct sk_buff *skb,
+				     struct tipc_nl_compat_msg *msg)
+{
+	struct nlattr *prop;
+	struct nlattr *bearer;
+	struct tipc_link_config *lc;
+
+	lc = (struct tipc_link_config *)TLV_DATA(msg->req);
+
+	bearer = nla_nest_start(skb, TIPC_NLA_BEARER);
+	if (!bearer)
+		return -EMSGSIZE;
+
+	if (nla_put_string(skb, TIPC_NLA_BEARER_NAME, lc->name))
+		return -EMSGSIZE;
+
+	prop = nla_nest_start(skb, TIPC_NLA_BEARER_PROP);
+	if (!prop)
+		return -EMSGSIZE;
+
+	__tipc_add_link_prop(skb, msg, lc);
+	nla_nest_end(skb, prop);
+	nla_nest_end(skb, bearer);
+
+	return 0;
+}
+
+static int __tipc_nl_compat_link_set(struct sk_buff *skb,
+				     struct tipc_nl_compat_msg *msg)
+{
+	struct nlattr *prop;
+	struct nlattr *link;
 	struct tipc_link_config *lc;
 
 	lc = (struct tipc_link_config *)TLV_DATA(msg->req);
@@ -596,24 +670,40 @@ static int tipc_nl_compat_link_set(struct sk_buff *skb,
 	if (!prop)
 		return -EMSGSIZE;
 
-	if (msg->cmd == TIPC_CMD_SET_LINK_PRI) {
-		if (nla_put_u32(skb, TIPC_NLA_PROP_PRIO, ntohl(lc->value)))
-			return -EMSGSIZE;
-	} else if (msg->cmd == TIPC_CMD_SET_LINK_TOL) {
-		if (nla_put_u32(skb, TIPC_NLA_PROP_TOL, ntohl(lc->value)))
-			return -EMSGSIZE;
-	} else if (msg->cmd == TIPC_CMD_SET_LINK_WINDOW) {
-		if (nla_put_u32(skb, TIPC_NLA_PROP_WIN, ntohl(lc->value)))
-			return -EMSGSIZE;
-	}
-
+	__tipc_add_link_prop(skb, msg, lc);
 	nla_nest_end(skb, prop);
 	nla_nest_end(skb, link);
 
 	return 0;
 }
 
-static int tipc_nl_compat_link_reset_stats(struct sk_buff *skb,
+static int tipc_nl_compat_link_set(struct tipc_nl_compat_cmd_doit *cmd,
+				   struct sk_buff *skb,
+				   struct tipc_nl_compat_msg *msg)
+{
+	struct tipc_link_config *lc;
+	struct tipc_bearer *bearer;
+	struct tipc_media *media;
+
+	lc = (struct tipc_link_config *)TLV_DATA(msg->req);
+
+	media = tipc_media_find(lc->name);
+	if (media) {
+		cmd->doit = &tipc_nl_media_set;
+		return tipc_nl_compat_media_set(skb, msg);
+	}
+
+	bearer = tipc_bearer_find(msg->net, lc->name);
+	if (bearer) {
+		cmd->doit = &tipc_nl_bearer_set;
+		return tipc_nl_compat_bearer_set(skb, msg);
+	}
+
+	return __tipc_nl_compat_link_set(skb, msg);
+}
+
+static int tipc_nl_compat_link_reset_stats(struct tipc_nl_compat_cmd_doit *cmd,
+					   struct sk_buff *skb,
 					   struct tipc_nl_compat_msg *msg)
 {
 	char *name;
@@ -851,7 +941,8 @@ static int tipc_nl_compat_node_dump(struct tipc_nl_compat_msg *msg,
 			    sizeof(node_info));
 }
 
-static int tipc_nl_compat_net_set(struct sk_buff *skb,
+static int tipc_nl_compat_net_set(struct tipc_nl_compat_cmd_doit *cmd,
+				  struct sk_buff *skb,
 				  struct tipc_nl_compat_msg *msg)
 {
 	u32 val;
@@ -1007,7 +1098,6 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
 	struct nlmsghdr *req_nlh;
 	struct nlmsghdr *rep_nlh;
 	struct tipc_genlmsghdr *req_userhdr = info->userhdr;
-	struct net *net = genl_info_net(info);
 
 	memset(&msg, 0, sizeof(msg));
 
@@ -1015,6 +1105,7 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
 	msg.req = nlmsg_data(req_nlh) + GENL_HDRLEN + TIPC_GENL_HDRLEN;
 	msg.cmd = req_userhdr->cmd;
 	msg.dst_sk = info->dst_sk;
+	msg.net = genl_info_net(info);
 
 	if ((msg.cmd & 0xC000) && (!netlink_net_capable(skb, CAP_NET_ADMIN))) {
 		msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_NET_ADMIN);
@@ -1030,7 +1121,7 @@ static int tipc_nl_compat_recv(struct sk_buff *skb, struct genl_info *info)
 	}
 
 	err = tipc_nl_compat_handle(&msg);
-	if (err == -EOPNOTSUPP)
+	if ((err == -EOPNOTSUPP) || (err == -EPERM))
 		msg.rep = tipc_get_err_tlv(TIPC_CFG_NOT_SUPPORTED);
 	else if (err == -EINVAL)
 		msg.rep = tipc_get_err_tlv(TIPC_CFG_TLV_ERROR);
@@ -1043,7 +1134,7 @@ send:
 	rep_nlh = nlmsg_hdr(msg.rep);
 	memcpy(rep_nlh, info->nlhdr, len);
 	rep_nlh->nlmsg_len = msg.rep->len;
-	genlmsg_unicast(net, msg.rep, NETLINK_CB(skb).portid);
+	genlmsg_unicast(msg.net, msg.rep, NETLINK_CB(skb).portid);
 
 	return err;
 }