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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/net/bridge/br_netlink.c
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/net/bridge/br_netlink.c')
-rw-r--r--kernel/net/bridge/br_netlink.c888
1 files changed, 888 insertions, 0 deletions
diff --git a/kernel/net/bridge/br_netlink.c b/kernel/net/bridge/br_netlink.c
new file mode 100644
index 000000000..4b5c23699
--- /dev/null
+++ b/kernel/net/bridge/br_netlink.c
@@ -0,0 +1,888 @@
+/*
+ * 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 <net/switchdev.h>
+#include <uapi/linux/if_bridge.h>
+
+#include "br_private.h"
+#include "br_private_stp.h"
+
+static int br_get_num_vlan_infos(const struct net_port_vlans *pv,
+ u32 filter_mask)
+{
+ u16 vid_range_start = 0, vid_range_end = 0;
+ u16 vid_range_flags = 0;
+ u16 pvid, vid, flags;
+ int num_vlans = 0;
+
+ if (filter_mask & RTEXT_FILTER_BRVLAN)
+ return pv->num_vlans;
+
+ if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+ return 0;
+
+ /* Count number of vlan info's
+ */
+ pvid = br_get_pvid(pv);
+ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+ flags = 0;
+ if (vid == pvid)
+ flags |= BRIDGE_VLAN_INFO_PVID;
+
+ if (test_bit(vid, pv->untagged_bitmap))
+ flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+ if (vid_range_start == 0) {
+ goto initvars;
+ } else if ((vid - vid_range_end) == 1 &&
+ flags == vid_range_flags) {
+ vid_range_end = vid;
+ continue;
+ } else {
+ if ((vid_range_end - vid_range_start) > 0)
+ num_vlans += 2;
+ else
+ num_vlans += 1;
+ }
+initvars:
+ vid_range_start = vid;
+ vid_range_end = vid;
+ vid_range_flags = flags;
+ }
+
+ if (vid_range_start != 0) {
+ if ((vid_range_end - vid_range_start) > 0)
+ num_vlans += 2;
+ else
+ num_vlans += 1;
+ }
+
+ return num_vlans;
+}
+
+static size_t br_get_link_af_size_filtered(const struct net_device *dev,
+ u32 filter_mask)
+{
+ struct net_port_vlans *pv;
+ int num_vlan_infos;
+
+ rcu_read_lock();
+ if (br_port_exists(dev))
+ pv = nbp_get_vlan_info(br_port_get_rcu(dev));
+ else if (dev->priv_flags & IFF_EBRIDGE)
+ pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
+ else
+ pv = NULL;
+ if (pv)
+ num_vlan_infos = br_get_num_vlan_infos(pv, filter_mask);
+ else
+ num_vlan_infos = 0;
+ rcu_read_unlock();
+
+ if (!num_vlan_infos)
+ return 0;
+
+ /* Each VLAN is returned in bridge_vlan_info along with flags */
+ return num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+static inline size_t br_port_info_size(void)
+{
+ return nla_total_size(1) /* IFLA_BRPORT_STATE */
+ + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */
+ + nla_total_size(4) /* IFLA_BRPORT_COST */
+ + nla_total_size(1) /* IFLA_BRPORT_MODE */
+ + nla_total_size(1) /* IFLA_BRPORT_GUARD */
+ + nla_total_size(1) /* IFLA_BRPORT_PROTECT */
+ + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */
+ + nla_total_size(1) /* IFLA_BRPORT_LEARNING */
+ + nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
+ + 0;
+}
+
+static inline size_t br_nlmsg_size(struct net_device *dev, u32 filter_mask)
+{
+ 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(br_port_info_size()) /* IFLA_PROTINFO */
+ + nla_total_size(br_get_link_af_size_filtered(dev,
+ filter_mask)); /* IFLA_AF_SPEC */
+}
+
+static int br_port_fill_attrs(struct sk_buff *skb,
+ const struct net_bridge_port *p)
+{
+ u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
+
+ if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) ||
+ nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) ||
+ nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) ||
+ nla_put_u8(skb, IFLA_BRPORT_MODE, mode) ||
+ nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) ||
+ nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) ||
+ nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE)) ||
+ nla_put_u8(skb, IFLA_BRPORT_LEARNING, !!(p->flags & BR_LEARNING)) ||
+ nla_put_u8(skb, IFLA_BRPORT_UNICAST_FLOOD, !!(p->flags & BR_FLOOD)) ||
+ nla_put_u8(skb, IFLA_BRPORT_PROXYARP, !!(p->flags & BR_PROXYARP)) ||
+ nla_put_u8(skb, IFLA_BRPORT_PROXYARP_WIFI,
+ !!(p->flags & BR_PROXYARP_WIFI)))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static int br_fill_ifvlaninfo_range(struct sk_buff *skb, u16 vid_start,
+ u16 vid_end, u16 flags)
+{
+ struct bridge_vlan_info vinfo;
+
+ if ((vid_end - vid_start) > 0) {
+ /* add range to skb */
+ vinfo.vid = vid_start;
+ vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_BEGIN;
+ if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ goto nla_put_failure;
+
+ vinfo.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
+
+ vinfo.vid = vid_end;
+ vinfo.flags = flags | BRIDGE_VLAN_INFO_RANGE_END;
+ if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ goto nla_put_failure;
+ } else {
+ vinfo.vid = vid_start;
+ vinfo.flags = flags;
+ if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ goto nla_put_failure;
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+static int br_fill_ifvlaninfo_compressed(struct sk_buff *skb,
+ const struct net_port_vlans *pv)
+{
+ u16 vid_range_start = 0, vid_range_end = 0;
+ u16 vid_range_flags = 0;
+ u16 pvid, vid, flags;
+ int err = 0;
+
+ /* Pack IFLA_BRIDGE_VLAN_INFO's for every vlan
+ * and mark vlan info with begin and end flags
+ * if vlaninfo represents a range
+ */
+ pvid = br_get_pvid(pv);
+ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+ flags = 0;
+ if (vid == pvid)
+ flags |= BRIDGE_VLAN_INFO_PVID;
+
+ if (test_bit(vid, pv->untagged_bitmap))
+ flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+ if (vid_range_start == 0) {
+ goto initvars;
+ } else if ((vid - vid_range_end) == 1 &&
+ flags == vid_range_flags) {
+ vid_range_end = vid;
+ continue;
+ } else {
+ err = br_fill_ifvlaninfo_range(skb, vid_range_start,
+ vid_range_end,
+ vid_range_flags);
+ if (err)
+ return err;
+ }
+
+initvars:
+ vid_range_start = vid;
+ vid_range_end = vid;
+ vid_range_flags = flags;
+ }
+
+ if (vid_range_start != 0) {
+ /* Call it once more to send any left over vlans */
+ err = br_fill_ifvlaninfo_range(skb, vid_range_start,
+ vid_range_end,
+ vid_range_flags);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int br_fill_ifvlaninfo(struct sk_buff *skb,
+ const struct net_port_vlans *pv)
+{
+ struct bridge_vlan_info vinfo;
+ u16 pvid, vid;
+
+ pvid = br_get_pvid(pv);
+ for_each_set_bit(vid, pv->vlan_bitmap, VLAN_N_VID) {
+ vinfo.vid = vid;
+ vinfo.flags = 0;
+ if (vid == pvid)
+ vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
+
+ if (test_bit(vid, pv->untagged_bitmap))
+ vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+ if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO,
+ sizeof(vinfo), &vinfo))
+ goto nla_put_failure;
+ }
+
+ return 0;
+
+nla_put_failure:
+ return -EMSGSIZE;
+}
+
+/*
+ * 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,
+ u32 filter_mask, const struct net_device *dev)
+{
+ const struct net_bridge *br;
+ struct ifinfomsg *hdr;
+ struct nlmsghdr *nlh;
+ u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
+
+ if (port)
+ br = port->br;
+ else
+ br = netdev_priv(dev);
+
+ 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;
+
+ if (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) ||
+ (dev->addr_len &&
+ nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
+ (dev->ifindex != dev_get_iflink(dev) &&
+ nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))))
+ goto nla_put_failure;
+
+ if (event == RTM_NEWLINK && port) {
+ struct nlattr *nest
+ = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED);
+
+ if (nest == NULL || br_port_fill_attrs(skb, port) < 0)
+ goto nla_put_failure;
+ nla_nest_end(skb, nest);
+ }
+
+ /* Check if the VID information is requested */
+ if ((filter_mask & RTEXT_FILTER_BRVLAN) ||
+ (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)) {
+ const struct net_port_vlans *pv;
+ struct nlattr *af;
+ int err;
+
+ if (port)
+ pv = nbp_get_vlan_info(port);
+ else
+ pv = br_get_vlan_info(br);
+
+ if (!pv || bitmap_empty(pv->vlan_bitmap, VLAN_N_VID))
+ goto done;
+
+ af = nla_nest_start(skb, IFLA_AF_SPEC);
+ if (!af)
+ goto nla_put_failure;
+
+ if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
+ err = br_fill_ifvlaninfo_compressed(skb, pv);
+ else
+ err = br_fill_ifvlaninfo(skb, pv);
+ if (err)
+ goto nla_put_failure;
+ nla_nest_end(skb, af);
+ }
+
+done:
+ nlmsg_end(skb, nlh);
+ return 0;
+
+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;
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+ u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
+
+ if (!port)
+ return;
+
+ net = dev_net(port->dev);
+ br_debug(port->br, "port %u(%s) event %d\n",
+ (unsigned int)port->port_no, port->dev->name, event);
+
+ skb = nlmsg_new(br_nlmsg_size(port->dev, filter), GFP_ATOMIC);
+ if (skb == NULL)
+ goto errout;
+
+ err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, port->dev);
+ 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:
+ rtnl_set_sk_err(net, RTNLGRP_LINK, err);
+}
+
+
+/*
+ * Dump information about all ports, in response to GETLINK
+ */
+int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
+ struct net_device *dev, u32 filter_mask, int nlflags)
+{
+ struct net_bridge_port *port = br_port_get_rtnl(dev);
+
+ if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
+ !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+ return 0;
+
+ return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
+ filter_mask, dev);
+}
+
+static int br_vlan_info(struct net_bridge *br, struct net_bridge_port *p,
+ int cmd, struct bridge_vlan_info *vinfo)
+{
+ int err = 0;
+
+ switch (cmd) {
+ case RTM_SETLINK:
+ if (p) {
+ err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
+ if (err)
+ break;
+
+ if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
+ err = br_vlan_add(p->br, vinfo->vid,
+ vinfo->flags);
+ } else {
+ err = br_vlan_add(br, vinfo->vid, vinfo->flags);
+ }
+ break;
+
+ case RTM_DELLINK:
+ if (p) {
+ nbp_vlan_delete(p, vinfo->vid);
+ if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER)
+ br_vlan_delete(p->br, vinfo->vid);
+ } else {
+ br_vlan_delete(br, vinfo->vid);
+ }
+ break;
+ }
+
+ return err;
+}
+
+static int br_afspec(struct net_bridge *br,
+ struct net_bridge_port *p,
+ struct nlattr *af_spec,
+ int cmd)
+{
+ struct bridge_vlan_info *vinfo_start = NULL;
+ struct bridge_vlan_info *vinfo = NULL;
+ struct nlattr *attr;
+ int err = 0;
+ int rem;
+
+ nla_for_each_nested(attr, af_spec, rem) {
+ if (nla_type(attr) != IFLA_BRIDGE_VLAN_INFO)
+ continue;
+ if (nla_len(attr) != sizeof(struct bridge_vlan_info))
+ return -EINVAL;
+ vinfo = nla_data(attr);
+ if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
+ if (vinfo_start)
+ return -EINVAL;
+ vinfo_start = vinfo;
+ continue;
+ }
+
+ if (vinfo_start) {
+ struct bridge_vlan_info tmp_vinfo;
+ int v;
+
+ if (!(vinfo->flags & BRIDGE_VLAN_INFO_RANGE_END))
+ return -EINVAL;
+
+ if (vinfo->vid <= vinfo_start->vid)
+ return -EINVAL;
+
+ memcpy(&tmp_vinfo, vinfo_start,
+ sizeof(struct bridge_vlan_info));
+
+ for (v = vinfo_start->vid; v <= vinfo->vid; v++) {
+ tmp_vinfo.vid = v;
+ err = br_vlan_info(br, p, cmd, &tmp_vinfo);
+ if (err)
+ break;
+ }
+ vinfo_start = NULL;
+ } else {
+ err = br_vlan_info(br, p, cmd, vinfo);
+ }
+ if (err)
+ break;
+ }
+
+ return err;
+}
+
+static const struct nla_policy br_port_policy[IFLA_BRPORT_MAX + 1] = {
+ [IFLA_BRPORT_STATE] = { .type = NLA_U8 },
+ [IFLA_BRPORT_COST] = { .type = NLA_U32 },
+ [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 },
+ [IFLA_BRPORT_MODE] = { .type = NLA_U8 },
+ [IFLA_BRPORT_GUARD] = { .type = NLA_U8 },
+ [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 },
+ [IFLA_BRPORT_FAST_LEAVE]= { .type = NLA_U8 },
+ [IFLA_BRPORT_LEARNING] = { .type = NLA_U8 },
+ [IFLA_BRPORT_UNICAST_FLOOD] = { .type = NLA_U8 },
+};
+
+/* Change the state of the port and notify spanning tree */
+static int br_set_port_state(struct net_bridge_port *p, u8 state)
+{
+ if (state > BR_STATE_BLOCKING)
+ return -EINVAL;
+
+ /* if kernel STP is running, don't allow changes */
+ if (p->br->stp_enabled == BR_KERNEL_STP)
+ return -EBUSY;
+
+ /* if device is not up, change is not allowed
+ * if link is not present, only allowable state is disabled
+ */
+ if (!netif_running(p->dev) ||
+ (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED))
+ return -ENETDOWN;
+
+ br_set_state(p, state);
+ br_log_state(p);
+ br_port_state_selection(p->br);
+ return 0;
+}
+
+/* Set/clear or port flags based on attribute */
+static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
+ int attrtype, unsigned long mask)
+{
+ if (tb[attrtype]) {
+ u8 flag = nla_get_u8(tb[attrtype]);
+ if (flag)
+ p->flags |= mask;
+ else
+ p->flags &= ~mask;
+ }
+}
+
+/* Process bridge protocol info on port */
+static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
+{
+ int err;
+ unsigned long old_flags = p->flags;
+
+ br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
+ br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
+ br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
+ br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
+ br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
+ br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
+ br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
+ br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
+
+ if (tb[IFLA_BRPORT_COST]) {
+ err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST]));
+ if (err)
+ return err;
+ }
+
+ if (tb[IFLA_BRPORT_PRIORITY]) {
+ err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY]));
+ if (err)
+ return err;
+ }
+
+ if (tb[IFLA_BRPORT_STATE]) {
+ err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE]));
+ if (err)
+ return err;
+ }
+
+ br_port_flags_change(p, old_flags ^ p->flags);
+ return 0;
+}
+
+/* Change state and parameters on port. */
+int br_setlink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
+{
+ struct nlattr *protinfo;
+ struct nlattr *afspec;
+ struct net_bridge_port *p;
+ struct nlattr *tb[IFLA_BRPORT_MAX + 1];
+ int err = 0, ret_offload = 0;
+
+ protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO);
+ afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+ if (!protinfo && !afspec)
+ return 0;
+
+ p = br_port_get_rtnl(dev);
+ /* We want to accept dev as bridge itself if the AF_SPEC
+ * is set to see if someone is setting vlan info on the bridge
+ */
+ if (!p && !afspec)
+ return -EINVAL;
+
+ if (p && protinfo) {
+ if (protinfo->nla_type & NLA_F_NESTED) {
+ err = nla_parse_nested(tb, IFLA_BRPORT_MAX,
+ protinfo, br_port_policy);
+ if (err)
+ return err;
+
+ spin_lock_bh(&p->br->lock);
+ err = br_setport(p, tb);
+ spin_unlock_bh(&p->br->lock);
+ } else {
+ /* Binary compatibility with old RSTP */
+ if (nla_len(protinfo) < sizeof(u8))
+ return -EINVAL;
+
+ spin_lock_bh(&p->br->lock);
+ err = br_set_port_state(p, nla_get_u8(protinfo));
+ spin_unlock_bh(&p->br->lock);
+ }
+ if (err)
+ goto out;
+ }
+
+ if (afspec) {
+ err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
+ afspec, RTM_SETLINK);
+ }
+
+ if (p && !(flags & BRIDGE_FLAGS_SELF)) {
+ /* set bridge attributes in hardware if supported
+ */
+ ret_offload = netdev_switch_port_bridge_setlink(dev, nlh,
+ flags);
+ if (ret_offload && ret_offload != -EOPNOTSUPP)
+ br_warn(p->br, "error setting attrs on port %u(%s)\n",
+ (unsigned int)p->port_no, p->dev->name);
+ }
+
+ if (err == 0)
+ br_ifinfo_notify(RTM_NEWLINK, p);
+out:
+ return err;
+}
+
+/* Delete port information */
+int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
+{
+ struct nlattr *afspec;
+ struct net_bridge_port *p;
+ int err = 0, ret_offload = 0;
+
+ afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
+ if (!afspec)
+ return 0;
+
+ p = br_port_get_rtnl(dev);
+ /* We want to accept dev as bridge itself as well */
+ if (!p && !(dev->priv_flags & IFF_EBRIDGE))
+ return -EINVAL;
+
+ err = br_afspec((struct net_bridge *)netdev_priv(dev), p,
+ afspec, RTM_DELLINK);
+ if (err == 0)
+ /* Send RTM_NEWLINK because userspace
+ * expects RTM_NEWLINK for vlan dels
+ */
+ br_ifinfo_notify(RTM_NEWLINK, p);
+
+ if (p && !(flags & BRIDGE_FLAGS_SELF)) {
+ /* del bridge attributes in hardware
+ */
+ ret_offload = netdev_switch_port_bridge_dellink(dev, nlh,
+ flags);
+ if (ret_offload && ret_offload != -EOPNOTSUPP)
+ br_warn(p->br, "error deleting attrs on port %u (%s)\n",
+ (unsigned int)p->port_no, p->dev->name);
+ }
+
+ return err;
+}
+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;
+}
+
+static int br_dev_newlink(struct net *src_net, struct net_device *dev,
+ struct nlattr *tb[], struct nlattr *data[])
+{
+ struct net_bridge *br = netdev_priv(dev);
+
+ if (tb[IFLA_ADDRESS]) {
+ spin_lock_bh(&br->lock);
+ br_stp_change_bridge_id(br, nla_data(tb[IFLA_ADDRESS]));
+ spin_unlock_bh(&br->lock);
+ }
+
+ return register_netdevice(dev);
+}
+
+static int br_port_slave_changelink(struct net_device *brdev,
+ struct net_device *dev,
+ struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ if (!data)
+ return 0;
+ return br_setport(br_port_get_rtnl(dev), data);
+}
+
+static int br_port_fill_slave_info(struct sk_buff *skb,
+ const struct net_device *brdev,
+ const struct net_device *dev)
+{
+ return br_port_fill_attrs(skb, br_port_get_rtnl(dev));
+}
+
+static size_t br_port_get_slave_size(const struct net_device *brdev,
+ const struct net_device *dev)
+{
+ return br_port_info_size();
+}
+
+static const struct nla_policy br_policy[IFLA_BR_MAX + 1] = {
+ [IFLA_BR_FORWARD_DELAY] = { .type = NLA_U32 },
+ [IFLA_BR_HELLO_TIME] = { .type = NLA_U32 },
+ [IFLA_BR_MAX_AGE] = { .type = NLA_U32 },
+ [IFLA_BR_AGEING_TIME] = { .type = NLA_U32 },
+ [IFLA_BR_STP_STATE] = { .type = NLA_U32 },
+ [IFLA_BR_PRIORITY] = { .type = NLA_U16 },
+};
+
+static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
+ struct nlattr *data[])
+{
+ struct net_bridge *br = netdev_priv(brdev);
+ int err;
+
+ if (!data)
+ return 0;
+
+ if (data[IFLA_BR_FORWARD_DELAY]) {
+ err = br_set_forward_delay(br, nla_get_u32(data[IFLA_BR_FORWARD_DELAY]));
+ if (err)
+ return err;
+ }
+
+ if (data[IFLA_BR_HELLO_TIME]) {
+ err = br_set_hello_time(br, nla_get_u32(data[IFLA_BR_HELLO_TIME]));
+ if (err)
+ return err;
+ }
+
+ if (data[IFLA_BR_MAX_AGE]) {
+ err = br_set_max_age(br, nla_get_u32(data[IFLA_BR_MAX_AGE]));
+ if (err)
+ return err;
+ }
+
+ if (data[IFLA_BR_AGEING_TIME]) {
+ u32 ageing_time = nla_get_u32(data[IFLA_BR_AGEING_TIME]);
+
+ br->ageing_time = clock_t_to_jiffies(ageing_time);
+ }
+
+ if (data[IFLA_BR_STP_STATE]) {
+ u32 stp_enabled = nla_get_u32(data[IFLA_BR_STP_STATE]);
+
+ br_stp_set_enabled(br, stp_enabled);
+ }
+
+ if (data[IFLA_BR_PRIORITY]) {
+ u32 priority = nla_get_u16(data[IFLA_BR_PRIORITY]);
+
+ br_stp_set_bridge_priority(br, priority);
+ }
+
+ return 0;
+}
+
+static size_t br_get_size(const struct net_device *brdev)
+{
+ return nla_total_size(sizeof(u32)) + /* IFLA_BR_FORWARD_DELAY */
+ nla_total_size(sizeof(u32)) + /* IFLA_BR_HELLO_TIME */
+ nla_total_size(sizeof(u32)) + /* IFLA_BR_MAX_AGE */
+ nla_total_size(sizeof(u32)) + /* IFLA_BR_AGEING_TIME */
+ nla_total_size(sizeof(u32)) + /* IFLA_BR_STP_STATE */
+ nla_total_size(sizeof(u16)) + /* IFLA_BR_PRIORITY */
+ 0;
+}
+
+static int br_fill_info(struct sk_buff *skb, const struct net_device *brdev)
+{
+ struct net_bridge *br = netdev_priv(brdev);
+ u32 forward_delay = jiffies_to_clock_t(br->forward_delay);
+ u32 hello_time = jiffies_to_clock_t(br->hello_time);
+ u32 age_time = jiffies_to_clock_t(br->max_age);
+ u32 ageing_time = jiffies_to_clock_t(br->ageing_time);
+ u32 stp_enabled = br->stp_enabled;
+ u16 priority = (br->bridge_id.prio[0] << 8) | br->bridge_id.prio[1];
+
+ if (nla_put_u32(skb, IFLA_BR_FORWARD_DELAY, forward_delay) ||
+ nla_put_u32(skb, IFLA_BR_HELLO_TIME, hello_time) ||
+ nla_put_u32(skb, IFLA_BR_MAX_AGE, age_time) ||
+ nla_put_u32(skb, IFLA_BR_AGEING_TIME, ageing_time) ||
+ nla_put_u32(skb, IFLA_BR_STP_STATE, stp_enabled) ||
+ nla_put_u16(skb, IFLA_BR_PRIORITY, priority))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+static size_t br_get_link_af_size(const struct net_device *dev)
+{
+ struct net_port_vlans *pv;
+
+ if (br_port_exists(dev))
+ pv = nbp_get_vlan_info(br_port_get_rtnl(dev));
+ else if (dev->priv_flags & IFF_EBRIDGE)
+ pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev));
+ else
+ return 0;
+
+ if (!pv)
+ return 0;
+
+ /* Each VLAN is returned in bridge_vlan_info along with flags */
+ return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info));
+}
+
+static struct rtnl_af_ops br_af_ops __read_mostly = {
+ .family = AF_BRIDGE,
+ .get_link_af_size = br_get_link_af_size,
+};
+
+struct rtnl_link_ops br_link_ops __read_mostly = {
+ .kind = "bridge",
+ .priv_size = sizeof(struct net_bridge),
+ .setup = br_dev_setup,
+ .maxtype = IFLA_BRPORT_MAX,
+ .policy = br_policy,
+ .validate = br_validate,
+ .newlink = br_dev_newlink,
+ .changelink = br_changelink,
+ .dellink = br_dev_delete,
+ .get_size = br_get_size,
+ .fill_info = br_fill_info,
+
+ .slave_maxtype = IFLA_BRPORT_MAX,
+ .slave_policy = br_port_policy,
+ .slave_changelink = br_port_slave_changelink,
+ .get_slave_size = br_port_get_slave_size,
+ .fill_slave_info = br_port_fill_slave_info,
+};
+
+int __init br_netlink_init(void)
+{
+ int err;
+
+ br_mdb_init();
+ rtnl_af_register(&br_af_ops);
+
+ err = rtnl_link_register(&br_link_ops);
+ if (err)
+ goto out_af;
+
+ return 0;
+
+out_af:
+ rtnl_af_unregister(&br_af_ops);
+ br_mdb_uninit();
+ return err;
+}
+
+void br_netlink_fini(void)
+{
+ br_mdb_uninit();
+ rtnl_af_unregister(&br_af_ops);
+ rtnl_link_unregister(&br_link_ops);
+}