zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/bridge/br_netlink.c b/ap/os/linux/linux-3.4.x/net/bridge/br_netlink.c
new file mode 100644
index 0000000..cbf9ccd
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/bridge/br_netlink.c
@@ -0,0 +1,265 @@
+/*
+ * Bridge netlink control interface
+ *
+ * Authors:
+ * Stephen Hemminger <shemminger@osdl.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/etherdevice.h>
+#include <net/rtnetlink.h>
+#include <net/net_namespace.h>
+#include <net/sock.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+static inline size_t br_nlmsg_size(void)
+{
+ return NLMSG_ALIGN(sizeof(struct ifinfomsg))
+ + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
+ + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
+ + nla_total_size(4) /* IFLA_MASTER */
+ + nla_total_size(4) /* IFLA_MTU */
+ + nla_total_size(4) /* IFLA_LINK */
+ + nla_total_size(1) /* IFLA_OPERSTATE */
+ + nla_total_size(1); /* IFLA_PROTINFO */
+}
+
+/*
+ * Create one netlink message for one interface
+ * Contains port and master info as well as carrier and bridge state.
+ */
+static int br_fill_ifinfo(struct sk_buff *skb, const struct net_bridge_port *port,
+ u32 pid, u32 seq, int event, unsigned int flags)
+{
+ const struct net_bridge *br = port->br;
+ const struct net_device *dev = port->dev;
+ struct ifinfomsg *hdr;
+ struct nlmsghdr *nlh;
+ u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+
+ br_debug(br, "br_fill_info event %d port %s master %s\n",
+ event, dev->name, br->dev->name);
+
+ nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags);
+ if (nlh == NULL)
+ return -EMSGSIZE;
+
+ hdr = nlmsg_data(nlh);
+ hdr->ifi_family = AF_BRIDGE;
+ hdr->__ifi_pad = 0;
+ hdr->ifi_type = dev->type;
+ hdr->ifi_index = dev->ifindex;
+ hdr->ifi_flags = dev_get_flags(dev);
+ hdr->ifi_change = 0;
+
+ NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name);
+ NLA_PUT_U32(skb, IFLA_MASTER, br->dev->ifindex);
+ NLA_PUT_U32(skb, IFLA_MTU, dev->mtu);
+ NLA_PUT_U8(skb, IFLA_OPERSTATE, operstate);
+
+ if (dev->addr_len)
+ NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr);
+
+ if (dev->ifindex != dev->iflink)
+ NLA_PUT_U32(skb, IFLA_LINK, dev->iflink);
+
+ if (event == RTM_NEWLINK)
+ NLA_PUT_U8(skb, IFLA_PROTINFO, port->state);
+
+ return nlmsg_end(skb, nlh);
+
+nla_put_failure:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+/*
+ * Notify listeners of a change in port information
+ */
+void br_ifinfo_notify(int event, struct net_bridge_port *port)
+{
+ struct net *net = dev_net(port->dev);
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+
+ br_debug(port->br, "port %u(%s) event %d\n",
+ (unsigned)port->port_no, port->dev->name, event);
+
+ skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC);
+ if (skb == NULL)
+ goto errout;
+
+ err = br_fill_ifinfo(skb, port, 0, 0, event, 0);
+ if (err < 0) {
+ /* -EMSGSIZE implies BUG in br_nlmsg_size() */
+ WARN_ON(err == -EMSGSIZE);
+ kfree_skb(skb);
+ goto errout;
+ }
+ rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC);
+ return;
+errout:
+ if (err < 0)
+ rtnl_set_sk_err(net, RTNLGRP_LINK, err);
+}
+
+/*
+ * Dump information about all ports, in response to GETLINK
+ */
+static int br_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct net *net = sock_net(skb->sk);
+ struct net_device *dev;
+ int idx;
+
+ idx = 0;
+ rcu_read_lock();
+ for_each_netdev_rcu(net, dev) {
+ struct net_bridge_port *port = br_port_get_rcu(dev);
+
+ /* not a bridge port */
+ if (!port || idx < cb->args[0])
+ goto skip;
+
+ if (br_fill_ifinfo(skb, port,
+ NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, RTM_NEWLINK,
+ NLM_F_MULTI) < 0)
+ break;
+skip:
+ ++idx;
+ }
+ rcu_read_unlock();
+ cb->args[0] = idx;
+
+ return skb->len;
+}
+
+/*
+ * Change state of port (ie from forwarding to blocking etc)
+ * Used by spanning tree in user space.
+ */
+static int br_rtm_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
+{
+ struct net *net = sock_net(skb->sk);
+ struct ifinfomsg *ifm;
+ struct nlattr *protinfo;
+ struct net_device *dev;
+ struct net_bridge_port *p;
+ u8 new_state;
+
+ if (nlmsg_len(nlh) < sizeof(*ifm))
+ return -EINVAL;
+
+ ifm = nlmsg_data(nlh);
+ if (ifm->ifi_family != AF_BRIDGE)
+ return -EPFNOSUPPORT;
+
+ protinfo = nlmsg_find_attr(nlh, sizeof(*ifm), IFLA_PROTINFO);
+ if (!protinfo || nla_len(protinfo) < sizeof(u8))
+ return -EINVAL;
+
+ new_state = nla_get_u8(protinfo);
+ if (new_state > BR_STATE_BLOCKING)
+ return -EINVAL;
+
+ dev = __dev_get_by_index(net, ifm->ifi_index);
+ if (!dev)
+ return -ENODEV;
+
+ p = br_port_get_rtnl(dev);
+ if (!p)
+ return -EINVAL;
+
+ /* if kernel STP is running, don't allow changes */
+ if (p->br->stp_enabled == BR_KERNEL_STP)
+ return -EBUSY;
+
+ if (!netif_running(dev) ||
+ (!netif_carrier_ok(dev) && new_state != BR_STATE_DISABLED))
+ return -ENETDOWN;
+
+ p->state = new_state;
+ br_log_state(p);
+
+ spin_lock_bh(&p->br->lock);
+ br_port_state_selection(p->br);
+ spin_unlock_bh(&p->br->lock);
+
+ br_ifinfo_notify(RTM_NEWLINK, p);
+
+ return 0;
+}
+
+static int br_validate(struct nlattr *tb[], struct nlattr *data[])
+{
+ if (tb[IFLA_ADDRESS]) {
+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
+ return -EINVAL;
+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
+ return -EADDRNOTAVAIL;
+ }
+
+ return 0;
+}
+
+struct rtnl_link_ops br_link_ops __read_mostly = {
+ .kind = "bridge",
+ .priv_size = sizeof(struct net_bridge),
+ .setup = br_dev_setup,
+ .validate = br_validate,
+ .dellink = br_dev_delete,
+};
+
+int __init br_netlink_init(void)
+{
+ int err;
+
+ err = rtnl_link_register(&br_link_ops);
+ if (err < 0)
+ goto err1;
+
+ err = __rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL,
+ br_dump_ifinfo, NULL);
+ if (err)
+ goto err2;
+ err = __rtnl_register(PF_BRIDGE, RTM_SETLINK,
+ br_rtm_setlink, NULL, NULL);
+ if (err)
+ goto err3;
+ err = __rtnl_register(PF_BRIDGE, RTM_NEWNEIGH,
+ br_fdb_add, NULL, NULL);
+ if (err)
+ goto err3;
+ err = __rtnl_register(PF_BRIDGE, RTM_DELNEIGH,
+ br_fdb_delete, NULL, NULL);
+ if (err)
+ goto err3;
+ err = __rtnl_register(PF_BRIDGE, RTM_GETNEIGH,
+ NULL, br_fdb_dump, NULL);
+ if (err)
+ goto err3;
+
+ return 0;
+
+err3:
+ rtnl_unregister_all(PF_BRIDGE);
+err2:
+ rtnl_link_unregister(&br_link_ops);
+err1:
+ return err;
+}
+
+void __exit br_netlink_fini(void)
+{
+ rtnl_link_unregister(&br_link_ops);
+ rtnl_unregister_all(PF_BRIDGE);
+}