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br_netlink.c
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/*
* 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 <uapi/linux/if_bridge.h>
#include "br_private.h"
#include "br_private_stp.h"
static int __get_num_vlan_infos(struct net_bridge_vlan_group *vg,
u32 filter_mask)
{
struct net_bridge_vlan *v;
u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
u16 flags, pvid;
int num_vlans = 0;
if (!(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
return 0;
pvid = br_get_pvid(vg);
/* Count number of vlan infos */
list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
flags = 0;
/* only a context, bridge vlan not activated */
if (!br_vlan_should_use(v))
continue;
if (v->vid == pvid)
flags |= BRIDGE_VLAN_INFO_PVID;
if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
flags |= BRIDGE_VLAN_INFO_UNTAGGED;
if (vid_range_start == 0) {
goto initvars;
} else if ((v->vid - vid_range_end) == 1 &&
flags == vid_range_flags) {
vid_range_end = v->vid;
continue;
} else {
if ((vid_range_end - vid_range_start) > 0)
num_vlans += 2;
else
num_vlans += 1;
}
initvars:
vid_range_start = v->vid;
vid_range_end = v->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 int br_get_num_vlan_infos(struct net_bridge_vlan_group *vg,
u32 filter_mask)
{
int num_vlans;
if (!vg)
return 0;
if (filter_mask & RTEXT_FILTER_BRVLAN)
return vg->num_vlans;
rcu_read_lock();
num_vlans = __get_num_vlan_infos(vg, filter_mask);
rcu_read_unlock();
return num_vlans;
}
static size_t br_get_link_af_size_filtered(const struct net_device *dev,
u32 filter_mask)
{
struct net_bridge_vlan_group *vg = NULL;
struct net_bridge_port *p;
struct net_bridge *br;
int num_vlan_infos;
rcu_read_lock();
if (br_port_exists(dev)) {
p = br_port_get_rcu(dev);
vg = nbp_vlan_group_rcu(p);
} else if (dev->priv_flags & IFF_EBRIDGE) {
br = netdev_priv(dev);
vg = br_vlan_group_rcu(br);
}
num_vlan_infos = br_get_num_vlan_infos(vg, filter_mask);
rcu_read_unlock();
/* 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 */
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
+ nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_ROOT_ID */
+ nla_total_size(sizeof(struct ifla_bridge_id)) /* IFLA_BRPORT_BRIDGE_ID */
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_PORT */
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_DESIGNATED_COST */
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_ID */
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_NO */
+ nla_total_size(sizeof(u8)) /* IFLA_BRPORT_TOPOLOGY_CHANGE_ACK */
+ nla_total_size(sizeof(u8)) /* IFLA_BRPORT_CONFIG_PENDING */
+ nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_MESSAGE_AGE_TIMER */
+ nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_FORWARD_DELAY_TIMER */
+ nla_total_size_64bit(sizeof(u64)) /* IFLA_BRPORT_HOLD_TIMER */
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+ nla_total_size(sizeof(u8)) /* IFLA_BRPORT_MULTICAST_ROUTER */
#endif
+ 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);
u64 timerval;
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_MCAST_FLOOD,
!!(p->flags & BR_MCAST_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)) ||
nla_put(skb, IFLA_BRPORT_ROOT_ID, sizeof(struct ifla_bridge_id),
&p->designated_root) ||
nla_put(skb, IFLA_BRPORT_BRIDGE_ID, sizeof(struct ifla_bridge_id),
&p->designated_bridge) ||
nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_PORT, p->designated_port) ||
nla_put_u16(skb, IFLA_BRPORT_DESIGNATED_COST, p->designated_cost) ||
nla_put_u16(skb, IFLA_BRPORT_ID, p->port_id) ||
nla_put_u16(skb, IFLA_BRPORT_NO, p->port_no) ||
nla_put_u8(skb, IFLA_BRPORT_TOPOLOGY_CHANGE_ACK,
p->topology_change_ack) ||
nla_put_u8(skb, IFLA_BRPORT_CONFIG_PENDING, p->config_pending))
return -EMSGSIZE;
timerval = br_timer_value(&p->message_age_timer);
if (nla_put_u64_64bit(skb, IFLA_BRPORT_MESSAGE_AGE_TIMER, timerval,
IFLA_BRPORT_PAD))
return -EMSGSIZE;
timerval = br_timer_value(&p->forward_delay_timer);
if (nla_put_u64_64bit(skb, IFLA_BRPORT_FORWARD_DELAY_TIMER, timerval,
IFLA_BRPORT_PAD))
return -EMSGSIZE;
timerval = br_timer_value(&p->hold_timer);
if (nla_put_u64_64bit(skb, IFLA_BRPORT_HOLD_TIMER, timerval,
IFLA_BRPORT_PAD))
return -EMSGSIZE;
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
if (nla_put_u8(skb, IFLA_BRPORT_MULTICAST_ROUTER,
p->multicast_router))
return -EMSGSIZE;
#endif
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.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,
struct net_bridge_vlan_group *vg)
{
struct net_bridge_vlan *v;
u16 vid_range_start = 0, vid_range_end = 0, vid_range_flags = 0;
u16 flags, pvid;
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(vg);
list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
flags = 0;
if (!br_vlan_should_use(v))
continue;
if (v->vid == pvid)
flags |= BRIDGE_VLAN_INFO_PVID;
if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
flags |= BRIDGE_VLAN_INFO_UNTAGGED;
if (vid_range_start == 0) {
goto initvars;
} else if ((v->vid - vid_range_end) == 1 &&
flags == vid_range_flags) {
vid_range_end = v->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 = v->vid;
vid_range_end = v->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,
struct net_bridge_vlan_group *vg)
{
struct bridge_vlan_info vinfo;
struct net_bridge_vlan *v;
u16 pvid;
pvid = br_get_pvid(vg);
list_for_each_entry_rcu(v, &vg->vlan_list, vlist) {
if (!br_vlan_should_use(v))
continue;
vinfo.vid = v->vid;
vinfo.flags = 0;
if (v->vid == pvid)
vinfo.flags |= BRIDGE_VLAN_INFO_PVID;
if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)
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,
struct net_bridge_port *port,
u32 pid, u32 seq, int event, unsigned int flags,
u32 filter_mask, const struct net_device *dev)
{
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)) {
struct net_bridge_vlan_group *vg;
struct nlattr *af;
int err;
/* RCU needed because of the VLAN locking rules (rcu || rtnl) */
rcu_read_lock();
if (port)
vg = nbp_vlan_group_rcu(port);
else
vg = br_vlan_group_rcu(br);
if (!vg || !vg->num_vlans) {
rcu_read_unlock();
goto done;
}
af = nla_nest_start(skb, IFLA_AF_SPEC);
if (!af) {
rcu_read_unlock();
goto nla_put_failure;
}
if (filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED)
err = br_fill_ifvlaninfo_compressed(skb, vg);
else
err = br_fill_ifvlaninfo(skb, vg);
rcu_read_unlock();
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) {
/* if the MASTER flag is set this will act on the global
* per-VLAN entry as well
*/
err = nbp_vlan_add(p, vinfo->vid, vinfo->flags);
if (err)
break;
} else {
vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
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->vid || vinfo->vid >= VLAN_VID_MASK)
return -EINVAL;
if (vinfo->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
if (vinfo_start)
return -EINVAL;
vinfo_start = vinfo;
/* don't allow range of pvids */
if (vinfo_start->flags & BRIDGE_VLAN_INFO_PVID)
return -EINVAL;
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 },
[IFLA_BRPORT_PROXYARP] = { .type = NLA_U8 },
[IFLA_BRPORT_PROXYARP_WIFI] = { .type = NLA_U8 },
[IFLA_BRPORT_MULTICAST_ROUTER] = { .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_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_MCAST_FLOOD, BR_MCAST_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;
}
if (tb[IFLA_BRPORT_FLUSH])
br_fdb_delete_by_port(p->br, p, 0, 0);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
if (tb[IFLA_BRPORT_MULTICAST_ROUTER]) {
u8 mcast_router = nla_get_u8(tb[IFLA_BRPORT_MULTICAST_ROUTER]);
err = br_multicast_set_port_router(p, mcast_router);
if (err)
return err;
}
#endif
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;
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 (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;
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);
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;
}
if (!data)
return 0;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
if (data[IFLA_BR_VLAN_PROTOCOL]) {
switch (nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL])) {
case htons(ETH_P_8021Q):
case htons(ETH_P_8021AD):
break;
default:
return -EPROTONOSUPPORT;
}
}
#endif
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[])
{
struct net_bridge *br = netdev_priv(brdev);
int ret;
if (!data)
return 0;
spin_lock_bh(&br->lock);
ret = br_setport(br_port_get_rtnl(dev), data);
spin_unlock_bh(&br->lock);
return ret;
}
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 },
[IFLA_BR_VLAN_FILTERING] = { .type = NLA_U8 },
[IFLA_BR_VLAN_PROTOCOL] = { .type = NLA_U16 },
[IFLA_BR_GROUP_FWD_MASK] = { .type = NLA_U16 },
[IFLA_BR_GROUP_ADDR] = { .type = NLA_BINARY,
.len = ETH_ALEN },
[IFLA_BR_MCAST_ROUTER] = { .type = NLA_U8 },
[IFLA_BR_MCAST_SNOOPING] = { .type = NLA_U8 },
[IFLA_BR_MCAST_QUERY_USE_IFADDR] = { .type = NLA_U8 },
[IFLA_BR_MCAST_QUERIER] = { .type = NLA_U8 },
[IFLA_BR_MCAST_HASH_ELASTICITY] = { .type = NLA_U32 },
[IFLA_BR_MCAST_HASH_MAX] = { .type = NLA_U32 },
[IFLA_BR_MCAST_LAST_MEMBER_CNT] = { .type = NLA_U32 },
[IFLA_BR_MCAST_STARTUP_QUERY_CNT] = { .type = NLA_U32 },
[IFLA_BR_MCAST_LAST_MEMBER_INTVL] = { .type = NLA_U64 },
[IFLA_BR_MCAST_MEMBERSHIP_INTVL] = { .type = NLA_U64 },
[IFLA_BR_MCAST_QUERIER_INTVL] = { .type = NLA_U64 },
[IFLA_BR_MCAST_QUERY_INTVL] = { .type = NLA_U64 },
[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL] = { .type = NLA_U64 },
[IFLA_BR_MCAST_STARTUP_QUERY_INTVL] = { .type = NLA_U64 },
[IFLA_BR_NF_CALL_IPTABLES] = { .type = NLA_U8 },
[IFLA_BR_NF_CALL_IP6TABLES] = { .type = NLA_U8 },
[IFLA_BR_NF_CALL_ARPTABLES] = { .type = NLA_U8 },
[IFLA_BR_VLAN_DEFAULT_PVID] = { .type = NLA_U16 },
[IFLA_BR_VLAN_STATS_ENABLED] = { .type = NLA_U8 },
[IFLA_BR_MCAST_STATS_ENABLED] = { .type = NLA_U8 },
};
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]) {
err = br_set_ageing_time(br, nla_get_u32(data[IFLA_BR_AGEING_TIME]));
if (err)
return err;
}
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);
}
if (data[IFLA_BR_VLAN_FILTERING]) {
u8 vlan_filter = nla_get_u8(data[IFLA_BR_VLAN_FILTERING]);
err = __br_vlan_filter_toggle(br, vlan_filter);
if (err)
return err;
}
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
if (data[IFLA_BR_VLAN_PROTOCOL]) {
__be16 vlan_proto = nla_get_be16(data[IFLA_BR_VLAN_PROTOCOL]);
err = __br_vlan_set_proto(br, vlan_proto);
if (err)
return err;
}
if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
__u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
err = __br_vlan_set_default_pvid(br, defpvid);
if (err)
return err;
}
if (data[IFLA_BR_VLAN_STATS_ENABLED]) {
__u8 vlan_stats = nla_get_u8(data[IFLA_BR_VLAN_STATS_ENABLED]);
err = br_vlan_set_stats(br, vlan_stats);
if (err)
return err;
}
#endif
if (data[IFLA_BR_GROUP_FWD_MASK]) {
u16 fwd_mask = nla_get_u16(data[IFLA_BR_GROUP_FWD_MASK]);
if (fwd_mask & BR_GROUPFWD_RESTRICTED)
return -EINVAL;
br->group_fwd_mask = fwd_mask;
}
if (data[IFLA_BR_GROUP_ADDR]) {
u8 new_addr[ETH_ALEN];
if (nla_len(data[IFLA_BR_GROUP_ADDR]) != ETH_ALEN)
return -EINVAL;
memcpy(new_addr, nla_data(data[IFLA_BR_GROUP_ADDR]), ETH_ALEN);
if (!is_link_local_ether_addr(new_addr))
return -EINVAL;
if (new_addr[5] == 1 || /* 802.3x Pause address */
new_addr[5] == 2 || /* 802.3ad Slow protocols */
new_addr[5] == 3) /* 802.1X PAE address */
return -EINVAL;
spin_lock_bh(&br->lock);
memcpy(br->group_addr, new_addr, sizeof(br->group_addr));
spin_unlock_bh(&br->lock);
br->group_addr_set = true;
br_recalculate_fwd_mask(br);
}
if (data[IFLA_BR_FDB_FLUSH])
br_fdb_flush(br);
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
if (data[IFLA_BR_MCAST_ROUTER]) {
u8 multicast_router = nla_get_u8(data[IFLA_BR_MCAST_ROUTER]);
err = br_multicast_set_router(br, multicast_router);
if (err)
return err;
}
if (data[IFLA_BR_MCAST_SNOOPING]) {
u8 mcast_snooping = nla_get_u8(data[IFLA_BR_MCAST_SNOOPING]);
err = br_multicast_toggle(br, mcast_snooping);
if (err)
return err;
}
if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
u8 val;
val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
br->multicast_query_use_ifaddr = !!val;
}
if (data[IFLA_BR_MCAST_QUERIER]) {
u8 mcast_querier = nla_get_u8(data[IFLA_BR_MCAST_QUERIER]);
err = br_multicast_set_querier(br, mcast_querier);
if (err)