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linux_dsm_epyc7002/net/bridge/br_netlink.c
Johannes Berg 8cb081746c netlink: make validation more configurable for future strictness 
We currently have two levels of strict validation:

 1) liberal (default)
     - undefined (type >= max) & NLA_UNSPEC attributes accepted
     - attribute length >= expected accepted
     - garbage at end of message accepted
 2) strict (opt-in)
     - NLA_UNSPEC attributes accepted
     - attribute length >= expected accepted

Split out parsing strictness into four different options:
 * TRAILING     - check that there's no trailing data after parsing
                  attributes (in message or nested)
 * MAXTYPE      - reject attrs > max known type
 * UNSPEC       - reject attributes with NLA_UNSPEC policy entries
 * STRICT_ATTRS - strictly validate attribute size

The default for future things should be *everything*.
The current *_strict() is a combination of TRAILING and MAXTYPE,
and is renamed to _deprecated_strict().
The current regular parsing has none of this, and is renamed to
*_parse_deprecated().

Additionally it allows us to selectively set one of the new flags
even on old policies. Notably, the UNSPEC flag could be useful in
this case, since it can be arranged (by filling in the policy) to
not be an incompatible userspace ABI change, but would then going
forward prevent forgetting attribute entries. Similar can apply
to the POLICY flag.

We end up with the following renames:
 * nla_parse           -> nla_parse_deprecated
 * nla_parse_strict    -> nla_parse_deprecated_strict
 * nlmsg_parse         -> nlmsg_parse_deprecated
 * nlmsg_parse_strict  -> nlmsg_parse_deprecated_strict
 * nla_parse_nested    -> nla_parse_nested_deprecated
 * nla_validate_nested -> nla_validate_nested_deprecated

Using spatch, of course:
    @@
    expression TB, MAX, HEAD, LEN, POL, EXT;
    @@
    -nla_parse(TB, MAX, HEAD, LEN, POL, EXT)
    +nla_parse_deprecated(TB, MAX, HEAD, LEN, POL, EXT)

    @@
    expression NLH, HDRLEN, TB, MAX, POL, EXT;
    @@
    -nlmsg_parse(NLH, HDRLEN, TB, MAX, POL, EXT)
    +nlmsg_parse_deprecated(NLH, HDRLEN, TB, MAX, POL, EXT)

    @@
    expression NLH, HDRLEN, TB, MAX, POL, EXT;
    @@
    -nlmsg_parse_strict(NLH, HDRLEN, TB, MAX, POL, EXT)
    +nlmsg_parse_deprecated_strict(NLH, HDRLEN, TB, MAX, POL, EXT)

    @@
    expression TB, MAX, NLA, POL, EXT;
    @@
    -nla_parse_nested(TB, MAX, NLA, POL, EXT)
    +nla_parse_nested_deprecated(TB, MAX, NLA, POL, EXT)

    @@
    expression START, MAX, POL, EXT;
    @@
    -nla_validate_nested(START, MAX, POL, EXT)
    +nla_validate_nested_deprecated(START, MAX, POL, EXT)

    @@
    expression NLH, HDRLEN, MAX, POL, EXT;
    @@
    -nlmsg_validate(NLH, HDRLEN, MAX, POL, EXT)
    +nlmsg_validate_deprecated(NLH, HDRLEN, MAX, POL, EXT)

For this patch, don't actually add the strict, non-renamed versions
yet so that it breaks compile if I get it wrong.

Also, while at it, make nla_validate and nla_parse go down to a
common __nla_validate_parse() function to avoid code duplication.

Ultimately, this allows us to have very strict validation for every
new caller of nla_parse()/nlmsg_parse() etc as re-introduced in the
next patch, while existing things will continue to work as is.

In effect then, this adds fully strict validation for any new command.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-27 17:07:21 -04:00

1678 lines
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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"
#include "br_private_tunnel.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 = NULL;
struct net_bridge *br;
int num_vlan_infos;
size_t vinfo_sz = 0;
rcu_read_lock();
if (netif_is_bridge_port(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();
if (p && (p->flags & BR_VLAN_TUNNEL))
vinfo_sz += br_get_vlan_tunnel_info_size(vg);
/* Each VLAN is returned in bridge_vlan_info along with flags */
vinfo_sz += num_vlan_infos * nla_total_size(sizeof(struct bridge_vlan_info));
return vinfo_sz;
}
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_MCAST_TO_UCAST */
+ nla_total_size(1) /* IFLA_BRPORT_LEARNING */
+ nla_total_size(1) /* IFLA_BRPORT_UNICAST_FLOOD */
+ nla_total_size(1) /* IFLA_BRPORT_MCAST_FLOOD */
+ nla_total_size(1) /* IFLA_BRPORT_BCAST_FLOOD */
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP */
+ nla_total_size(1) /* IFLA_BRPORT_PROXYARP_WIFI */
+ nla_total_size(1) /* IFLA_BRPORT_VLAN_TUNNEL */
+ nla_total_size(1) /* IFLA_BRPORT_NEIGH_SUPPRESS */
+ nla_total_size(1) /* IFLA_BRPORT_ISOLATED */
+ 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
+ nla_total_size(sizeof(u16)) /* IFLA_BRPORT_GROUP_FWD_MASK */
+ 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 */
+ nla_total_size(4); /* IFLA_BRPORT_BACKUP_PORT */
}
static int br_port_fill_attrs(struct sk_buff *skb,
const struct net_bridge_port *p)
{
u8 mode = !!(p->flags & BR_HAIRPIN_MODE);
struct net_bridge_port *backup_p;
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_MCAST_TO_UCAST,
!!(p->flags & BR_MULTICAST_TO_UNICAST)) ||
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_BCAST_FLOOD,
!!(p->flags & BR_BCAST_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) ||
nla_put_u8(skb, IFLA_BRPORT_VLAN_TUNNEL, !!(p->flags &
BR_VLAN_TUNNEL)) ||
nla_put_u16(skb, IFLA_BRPORT_GROUP_FWD_MASK, p->group_fwd_mask) ||
nla_put_u8(skb, IFLA_BRPORT_NEIGH_SUPPRESS,
!!(p->flags & BR_NEIGH_SUPPRESS)) ||
nla_put_u8(skb, IFLA_BRPORT_ISOLATED, !!(p->flags & BR_ISOLATED)))
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
/* we might be called only with br->lock */
rcu_read_lock();
backup_p = rcu_dereference(p->backup_port);
if (backup_p)
nla_put_u32(skb, IFLA_BRPORT_BACKUP_PORT,
backup_p->dev->ifindex);
rcu_read_unlock();
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,
const struct net_bridge_port *port,
u32 pid, u32 seq, int event, unsigned int flags,
u32 filter_mask, const struct net_device *dev)
{
u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN;
struct net_bridge *br;
struct ifinfomsg *hdr;
struct nlmsghdr *nlh;
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;
nest = nla_nest_start(skb, IFLA_PROTINFO);
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_noflag(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);
if (port && (port->flags & BR_VLAN_TUNNEL))
err = br_fill_vlan_tunnel_info(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 bridge or port information */
void br_ifinfo_notify(int event, const struct net_bridge *br,
const struct net_bridge_port *port)
{
u32 filter = RTEXT_FILTER_BRVLAN_COMPRESSED;
struct net_device *dev;
struct sk_buff *skb;
int err = -ENOBUFS;
struct net *net;
u16 port_no = 0;
if (WARN_ON(!port && !br))
return;
if (port) {
dev = port->dev;
br = port->br;
port_no = port->port_no;
} else {
dev = br->dev;
}
net = dev_net(dev);
br_debug(br, "port %u(%s) event %d\n", port_no, dev->name, event);
skb = nlmsg_new(br_nlmsg_size(dev, filter), GFP_ATOMIC);
if (skb == NULL)
goto errout;
err = br_fill_ifinfo(skb, port, 0, 0, event, 0, filter, 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, bool *changed,
struct netlink_ext_ack *extack)
{
bool curr_change;
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,
&curr_change, extack);
} else {
vinfo->flags |= BRIDGE_VLAN_INFO_BRENTRY;
err = br_vlan_add(br, vinfo->vid, vinfo->flags,
&curr_change, extack);
}
if (curr_change)
*changed = true;
break;
case RTM_DELLINK:
if (p) {
if (!nbp_vlan_delete(p, vinfo->vid))
*changed = true;
if ((vinfo->flags & BRIDGE_VLAN_INFO_MASTER) &&
!br_vlan_delete(p->br, vinfo->vid))
*changed = true;
} else if (!br_vlan_delete(br, vinfo->vid)) {
*changed = true;
}
break;
}
return err;
}
static int br_process_vlan_info(struct net_bridge *br,
struct net_bridge_port *p, int cmd,
struct bridge_vlan_info *vinfo_curr,
struct bridge_vlan_info **vinfo_last,
bool *changed,
struct netlink_ext_ack *extack)
{
if (!vinfo_curr->vid || vinfo_curr->vid >= VLAN_VID_MASK)
return -EINVAL;
if (vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
/* check if we are already processing a range */
if (*vinfo_last)
return -EINVAL;
*vinfo_last = vinfo_curr;
/* don't allow range of pvids */
if ((*vinfo_last)->flags & BRIDGE_VLAN_INFO_PVID)
return -EINVAL;
return 0;
}
if (*vinfo_last) {
struct bridge_vlan_info tmp_vinfo;
int v, err;
if (!(vinfo_curr->flags & BRIDGE_VLAN_INFO_RANGE_END))
return -EINVAL;
if (vinfo_curr->vid <= (*vinfo_last)->vid)
return -EINVAL;
memcpy(&tmp_vinfo, *vinfo_last,
sizeof(struct bridge_vlan_info));
for (v = (*vinfo_last)->vid; v <= vinfo_curr->vid; v++) {
tmp_vinfo.vid = v;
err = br_vlan_info(br, p, cmd, &tmp_vinfo, changed,
extack);
if (err)
break;
}
*vinfo_last = NULL;
return err;
}
return br_vlan_info(br, p, cmd, vinfo_curr, changed, extack);
}
static int br_afspec(struct net_bridge *br,
struct net_bridge_port *p,
struct nlattr *af_spec,
int cmd, bool *changed,
struct netlink_ext_ack *extack)
{
struct bridge_vlan_info *vinfo_curr = NULL;
struct bridge_vlan_info *vinfo_last = NULL;
struct nlattr *attr;
struct vtunnel_info tinfo_last = {};
struct vtunnel_info tinfo_curr = {};
int err = 0, rem;
nla_for_each_nested(attr, af_spec, rem) {
err = 0;
switch (nla_type(attr)) {
case IFLA_BRIDGE_VLAN_TUNNEL_INFO:
if (!p || !(p->flags & BR_VLAN_TUNNEL))
return -EINVAL;
err = br_parse_vlan_tunnel_info(attr, &tinfo_curr);
if (err)
return err;
err = br_process_vlan_tunnel_info(br, p, cmd,
&tinfo_curr,
&tinfo_last,
changed);
if (err)
return err;
break;
case IFLA_BRIDGE_VLAN_INFO:
if (nla_len(attr) != sizeof(struct bridge_vlan_info))
return -EINVAL;
vinfo_curr = nla_data(attr);
err = br_process_vlan_info(br, p, cmd, vinfo_curr,
&vinfo_last, changed,
extack);
if (err)
return 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 },
[IFLA_BRPORT_MCAST_TO_UCAST] = { .type = NLA_U8 },
[IFLA_BRPORT_MCAST_FLOOD] = { .type = NLA_U8 },
[IFLA_BRPORT_BCAST_FLOOD] = { .type = NLA_U8 },
[IFLA_BRPORT_VLAN_TUNNEL] = { .type = NLA_U8 },
[IFLA_BRPORT_GROUP_FWD_MASK] = { .type = NLA_U16 },
[IFLA_BRPORT_NEIGH_SUPPRESS] = { .type = NLA_U8 },
[IFLA_BRPORT_ISOLATED] = { .type = NLA_U8 },
[IFLA_BRPORT_BACKUP_PORT] = { .type = NLA_U32 },
};
/* 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 int br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[],
int attrtype, unsigned long mask)
{
unsigned long flags;
int err;
if (!tb[attrtype])
return 0;
if (nla_get_u8(tb[attrtype]))
flags = p->flags | mask;
else
flags = p->flags & ~mask;
err = br_switchdev_set_port_flag(p, flags, mask);
if (err)
return err;
p->flags = flags;
return 0;
}
/* Process bridge protocol info on port */
static int br_setport(struct net_bridge_port *p, struct nlattr *tb[])
{
unsigned long old_flags = p->flags;
bool br_vlan_tunnel_old = false;
int err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_LEARNING, BR_LEARNING);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_MCAST_TO_UCAST, BR_MULTICAST_TO_UNICAST);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP, BR_PROXYARP);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_PROXYARP_WIFI, BR_PROXYARP_WIFI);
if (err)
return err;
br_vlan_tunnel_old = (p->flags & BR_VLAN_TUNNEL) ? true : false;
err = br_set_port_flag(p, tb, IFLA_BRPORT_VLAN_TUNNEL, BR_VLAN_TUNNEL);
if (err)
return err;
if (br_vlan_tunnel_old && !(p->flags & BR_VLAN_TUNNEL))
nbp_vlan_tunnel_info_flush(p);
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
if (tb[IFLA_BRPORT_GROUP_FWD_MASK]) {
u16 fwd_mask = nla_get_u16(tb[IFLA_BRPORT_GROUP_FWD_MASK]);
if (fwd_mask & BR_GROUPFWD_MACPAUSE)
return -EINVAL;
p->group_fwd_mask = fwd_mask;
}
err = br_set_port_flag(p, tb, IFLA_BRPORT_NEIGH_SUPPRESS,
BR_NEIGH_SUPPRESS);
if (err)
return err;
err = br_set_port_flag(p, tb, IFLA_BRPORT_ISOLATED, BR_ISOLATED);
if (err)
return err;
if (tb[IFLA_BRPORT_BACKUP_PORT]) {
struct net_device *backup_dev = NULL;
u32 backup_ifindex;
backup_ifindex = nla_get_u32(tb[IFLA_BRPORT_BACKUP_PORT]);
if (backup_ifindex) {
backup_dev = __dev_get_by_index(dev_net(p->dev),
backup_ifindex);
if (!backup_dev)
return -ENOENT;
}
err = nbp_backup_change(p, backup_dev);
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 netlink_ext_ack *extack)
{
struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
struct nlattr *tb[IFLA_BRPORT_MAX + 1];
struct net_bridge_port *p;
struct nlattr *protinfo;
struct nlattr *afspec;
bool changed = false;
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_deprecated(tb, IFLA_BRPORT_MAX,
protinfo,
br_port_policy,
NULL);
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;
changed = true;
}
if (afspec)
err = br_afspec(br, p, afspec, RTM_SETLINK, &changed, extack);
if (changed)
br_ifinfo_notify(RTM_NEWLINK, br, p);
out:
return err;
}
/* Delete port information */
int br_dellink(struct net_device *dev, struct nlmsghdr *nlh, u16 flags)
{
struct net_bridge *br = (struct net_bridge *)netdev_priv(dev);
struct net_bridge_port *p;
struct nlattr *afspec;
bool changed = false;
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(br, p, afspec, RTM_DELLINK, &changed, NULL);
if (changed)
/* Send RTM_NEWLINK because userspace
* expects RTM_NEWLINK for vlan dels
*/
br_ifinfo_notify(RTM_NEWLINK, br, p);
return err;
}
static int br_validate(struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
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;
}
}
if (data[IFLA_BR_VLAN_DEFAULT_PVID]) {
__u16 defpvid = nla_get_u16(data[IFLA_BR_VLAN_DEFAULT_PVID]);
if (defpvid >= VLAN_VID_MASK)
return -EINVAL;
}
#endif
return 0;
}
static int br_port_slave_changelink(struct net_device *brdev,
struct net_device *dev,
struct nlattr *tb[],
struct nlattr *data[],
struct netlink_ext_ack *extack)
{
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 },
[IFLA_BR_MCAST_IGMP_VERSION] = { .type = NLA_U8 },
[IFLA_BR_MCAST_MLD_VERSION] = { .type = NLA_U8 },
[IFLA_BR_VLAN_STATS_PER_PORT] = { .type = NLA_U8 },
[IFLA_BR_MULTI_BOOLOPT] = { .type = NLA_EXACT_LEN,
.len = sizeof(struct br_boolopt_multi) },
};
static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
struct nlattr *data[],
struct netlink_ext_ack *extack)
{
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, extack);
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;
}
if (data[IFLA_BR_VLAN_STATS_PER_PORT]) {
__u8 per_port = nla_get_u8(data[IFLA_BR_VLAN_STATS_PER_PORT]);
err = br_vlan_set_stats_per_port(br, per_port);
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_opt_toggle(br, BROPT_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]);
br_multicast_toggle(br, mcast_snooping);
}
if (data[IFLA_BR_MCAST_QUERY_USE_IFADDR]) {
u8 val;
val = nla_get_u8(data[IFLA_BR_MCAST_QUERY_USE_IFADDR]);
br_opt_toggle(br, BROPT_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)
return err;
}
if (data[IFLA_BR_MCAST_HASH_ELASTICITY])
br_warn(br, "the hash_elasticity option has been deprecated and is always %u\n",
RHT_ELASTICITY);
if (data[IFLA_BR_MCAST_HASH_MAX])
br->hash_max = nla_get_u32(data[IFLA_BR_MCAST_HASH_MAX]);
if (data[IFLA_BR_MCAST_LAST_MEMBER_CNT]) {
u32 val = nla_get_u32(data[IFLA_BR_MCAST_LAST_MEMBER_CNT]);
br->multicast_last_member_count = val;
}
if (data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]) {
u32 val = nla_get_u32(data[IFLA_BR_MCAST_STARTUP_QUERY_CNT]);
br->multicast_startup_query_count = val;
}
if (data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_LAST_MEMBER_INTVL]);
br->multicast_last_member_interval = clock_t_to_jiffies(val);
}
if (data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_MEMBERSHIP_INTVL]);
br->multicast_membership_interval = clock_t_to_jiffies(val);
}
if (data[IFLA_BR_MCAST_QUERIER_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERIER_INTVL]);
br->multicast_querier_interval = clock_t_to_jiffies(val);
}
if (data[IFLA_BR_MCAST_QUERY_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_INTVL]);
br->multicast_query_interval = clock_t_to_jiffies(val);
}
if (data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_QUERY_RESPONSE_INTVL]);
br->multicast_query_response_interval = clock_t_to_jiffies(val);
}
if (data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]) {
u64 val = nla_get_u64(data[IFLA_BR_MCAST_STARTUP_QUERY_INTVL]);
br->multicast_startup_query_interval = clock_t_to_jiffies(val);
}
if (data[IFLA_BR_MCAST_STATS_ENABLED]) {
__u8 mcast_stats;
mcast_stats = nla_get_u8(data[IFLA_BR_MCAST_STATS_ENABLED]);
br_opt_toggle(br, BROPT_MULTICAST_STATS_ENABLED, !!mcast_stats);
}
if (data[IFLA_BR_MCAST_IGMP_VERSION]) {
__u8 igmp_version;
igmp_version = nla_get_u8(data[IFLA_BR_MCAST_IGMP_VERSION]);
err = br_multicast_set_igmp_version(br, igmp_version);
if (err)
return err;
}
#if IS_ENABLED(CONFIG_IPV6)
if (data[IFLA_BR_MCAST_MLD_VERSION]) {
__u8 mld_version;
mld_version = nla_get_u8(data[IFLA_BR_MCAST_MLD_VERSION]);
err = br_multicast_set_mld_version(br, mld_version);
if (err)
return err;
}
#endif
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
if (data[IFLA_BR_NF_CALL_IPTABLES]) {
u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IPTABLES]);
br_opt_toggle(br, BROPT_NF_CALL_IPTABLES, !!val);
}
if (data[IFLA_BR_NF_CALL_IP6TABLES]) {
u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_IP6TABLES]);
br_opt_toggle(br, BROPT_NF_CALL_IP6TABLES, !!val);
}
if (data[IFLA_BR_NF_CALL_ARPTABLES]) {
u8 val = nla_get_u8(data[IFLA_BR_NF_CALL_ARPTABLES]);
br_opt_toggle(br, BROPT_NF_CALL_ARPTABLES, !!val);
}
#endif
if (data[IFLA_BR_MULTI_BOOLOPT]) {
struct br_boolopt_multi *bm;
bm = nla_data(data[IFLA_BR_MULTI_BOOLOPT]);
err = br_boolopt_multi_toggle(br, bm, extack);
if (err)
return err;
}
return 0;
}
static int br_dev_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
struct net_bridge *br = netdev_priv(dev);
int err;
err = register_netdevice(dev);
if (err)
return err;
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);
}
err = br_changelink(dev, tb, data, extack);
if (err)
br_dev_delete(dev, NULL);
return err;
}
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 */
nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_FILTERING */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
nla_total_size(sizeof(__be16)) + /* IFLA_BR_VLAN_PROTOCOL */
nla_total_size(sizeof(u16)) + /* IFLA_BR_VLAN_DEFAULT_PVID */
nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_ENABLED */
nla_total_size(sizeof(u8)) + /* IFLA_BR_VLAN_STATS_PER_PORT */
#endif
nla_total_size(sizeof(u16)) + /* IFLA_BR_GROUP_FWD_MASK */
nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_ROOT_ID */
nla_total_size(sizeof(struct ifla_bridge_id)) + /* IFLA_BR_BRIDGE_ID */
nla_total_size(sizeof(u16)) + /* IFLA_BR_ROOT_PORT */
nla_total_size(sizeof(u32)) + /* IFLA_BR_ROOT_PATH_COST */
nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE */
nla_total_size(sizeof(u8)) + /* IFLA_BR_TOPOLOGY_CHANGE_DETECTED */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_HELLO_TIMER */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TCN_TIMER */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_TOPOLOGY_CHANGE_TIMER */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_GC_TIMER */
nla_total_size(ETH_ALEN) + /* IFLA_BR_GROUP_ADDR */
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_ROUTER */
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_SNOOPING */
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERY_USE_IFADDR */
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_QUERIER */
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_STATS_ENABLED */
nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_ELASTICITY */
nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_HASH_MAX */
nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_LAST_MEMBER_CNT */
nla_total_size(sizeof(u32)) + /* IFLA_BR_MCAST_STARTUP_QUERY_CNT */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_LAST_MEMBER_INTVL */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_MEMBERSHIP_INTVL */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERIER_INTVL */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_INTVL */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_QUERY_RESPONSE_INTVL */
nla_total_size_64bit(sizeof(u64)) + /* IFLA_BR_MCAST_STARTUP_QUERY_INTVL */
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_IGMP_VERSION */
nla_total_size(sizeof(u8)) + /* IFLA_BR_MCAST_MLD_VERSION */
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IPTABLES */
nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_IP6TABLES */
nla_total_size(sizeof(u8)) + /* IFLA_BR_NF_CALL_ARPTABLES */
#endif
nla_total_size(sizeof(struct br_boolopt_multi)) + /* IFLA_BR_MULTI_BOOLOPT */
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];
u8 vlan_enabled = br_vlan_enabled(br->dev);
struct br_boolopt_multi bm;
u64 clockval;
clockval = br_timer_value(&br->hello_timer);
if (nla_put_u64_64bit(skb, IFLA_BR_HELLO_TIMER, clockval, IFLA_BR_PAD))
return -EMSGSIZE;
clockval = br_timer_value(&br->tcn_timer);
if (nla_put_u64_64bit(skb, IFLA_BR_TCN_TIMER, clockval, IFLA_BR_PAD))
return -EMSGSIZE;
clockval = br_timer_value(&br->topology_change_timer);
if (nla_put_u64_64bit(skb, IFLA_BR_TOPOLOGY_CHANGE_TIMER, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
clockval = br_timer_value(&br->gc_work.timer);
if (nla_put_u64_64bit(skb, IFLA_BR_GC_TIMER, clockval, IFLA_BR_PAD))
return -EMSGSIZE;
br_boolopt_multi_get(br, &bm);
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) ||
nla_put_u8(skb, IFLA_BR_VLAN_FILTERING, vlan_enabled) ||
nla_put_u16(skb, IFLA_BR_GROUP_FWD_MASK, br->group_fwd_mask) ||
nla_put(skb, IFLA_BR_BRIDGE_ID, sizeof(struct ifla_bridge_id),
&br->bridge_id) ||
nla_put(skb, IFLA_BR_ROOT_ID, sizeof(struct ifla_bridge_id),
&br->designated_root) ||
nla_put_u16(skb, IFLA_BR_ROOT_PORT, br->root_port) ||
nla_put_u32(skb, IFLA_BR_ROOT_PATH_COST, br->root_path_cost) ||
nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE, br->topology_change) ||
nla_put_u8(skb, IFLA_BR_TOPOLOGY_CHANGE_DETECTED,
br->topology_change_detected) ||
nla_put(skb, IFLA_BR_GROUP_ADDR, ETH_ALEN, br->group_addr) ||
nla_put(skb, IFLA_BR_MULTI_BOOLOPT, sizeof(bm), &bm))
return -EMSGSIZE;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
if (nla_put_be16(skb, IFLA_BR_VLAN_PROTOCOL, br->vlan_proto) ||
nla_put_u16(skb, IFLA_BR_VLAN_DEFAULT_PVID, br->default_pvid) ||
nla_put_u8(skb, IFLA_BR_VLAN_STATS_ENABLED,
br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) ||
nla_put_u8(skb, IFLA_BR_VLAN_STATS_PER_PORT,
br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)))
return -EMSGSIZE;
#endif
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
if (nla_put_u8(skb, IFLA_BR_MCAST_ROUTER, br->multicast_router) ||
nla_put_u8(skb, IFLA_BR_MCAST_SNOOPING,
br_opt_get(br, BROPT_MULTICAST_ENABLED)) ||
nla_put_u8(skb, IFLA_BR_MCAST_QUERY_USE_IFADDR,
br_opt_get(br, BROPT_MULTICAST_QUERY_USE_IFADDR)) ||
nla_put_u8(skb, IFLA_BR_MCAST_QUERIER,
br_opt_get(br, BROPT_MULTICAST_QUERIER)) ||
nla_put_u8(skb, IFLA_BR_MCAST_STATS_ENABLED,
br_opt_get(br, BROPT_MULTICAST_STATS_ENABLED)) ||
nla_put_u32(skb, IFLA_BR_MCAST_HASH_ELASTICITY, RHT_ELASTICITY) ||
nla_put_u32(skb, IFLA_BR_MCAST_HASH_MAX, br->hash_max) ||
nla_put_u32(skb, IFLA_BR_MCAST_LAST_MEMBER_CNT,
br->multicast_last_member_count) ||
nla_put_u32(skb, IFLA_BR_MCAST_STARTUP_QUERY_CNT,
br->multicast_startup_query_count) ||
nla_put_u8(skb, IFLA_BR_MCAST_IGMP_VERSION,
br->multicast_igmp_version))
return -EMSGSIZE;
#if IS_ENABLED(CONFIG_IPV6)
if (nla_put_u8(skb, IFLA_BR_MCAST_MLD_VERSION,
br->multicast_mld_version))
return -EMSGSIZE;
#endif
clockval = jiffies_to_clock_t(br->multicast_last_member_interval);
if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_LAST_MEMBER_INTVL, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
clockval = jiffies_to_clock_t(br->multicast_membership_interval);
if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_MEMBERSHIP_INTVL, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
clockval = jiffies_to_clock_t(br->multicast_querier_interval);
if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERIER_INTVL, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
clockval = jiffies_to_clock_t(br->multicast_query_interval);
if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_INTVL, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
clockval = jiffies_to_clock_t(br->multicast_query_response_interval);
if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_QUERY_RESPONSE_INTVL, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
clockval = jiffies_to_clock_t(br->multicast_startup_query_interval);
if (nla_put_u64_64bit(skb, IFLA_BR_MCAST_STARTUP_QUERY_INTVL, clockval,
IFLA_BR_PAD))
return -EMSGSIZE;
#endif
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
if (nla_put_u8(skb, IFLA_BR_NF_CALL_IPTABLES,
br_opt_get(br, BROPT_NF_CALL_IPTABLES) ? 1 : 0) ||
nla_put_u8(skb, IFLA_BR_NF_CALL_IP6TABLES,
br_opt_get(br, BROPT_NF_CALL_IP6TABLES) ? 1 : 0) ||
nla_put_u8(skb, IFLA_BR_NF_CALL_ARPTABLES,
br_opt_get(br, BROPT_NF_CALL_ARPTABLES) ? 1 : 0))
return -EMSGSIZE;
#endif
return 0;
}
static size_t br_get_linkxstats_size(const struct net_device *dev, int attr)
{
struct net_bridge_port *p = NULL;
struct net_bridge_vlan_group *vg;
struct net_bridge_vlan *v;
struct net_bridge *br;
int numvls = 0;
switch (attr) {
case IFLA_STATS_LINK_XSTATS:
br = netdev_priv(dev);
vg = br_vlan_group(br);
break;
case IFLA_STATS_LINK_XSTATS_SLAVE:
p = br_port_get_rtnl(dev);
if (!p)
return 0;
br = p->br;
vg = nbp_vlan_group(p);
break;
default:
return 0;
}
if (vg) {
/* we need to count all, even placeholder entries */
list_for_each_entry(v, &vg->vlan_list, vlist)
numvls++;
}
return numvls * nla_total_size(sizeof(struct bridge_vlan_xstats)) +
nla_total_size(sizeof(struct br_mcast_stats)) +
nla_total_size(0);
}
static int br_fill_linkxstats(struct sk_buff *skb,
const struct net_device *dev,
int *prividx, int attr)
{
struct nlattr *nla __maybe_unused;
struct net_bridge_port *p = NULL;
struct net_bridge_vlan_group *vg;
struct net_bridge_vlan *v;
struct net_bridge *br;
struct nlattr *nest;
int vl_idx = 0;
switch (attr) {
case IFLA_STATS_LINK_XSTATS:
br = netdev_priv(dev);
vg = br_vlan_group(br);
break;
case IFLA_STATS_LINK_XSTATS_SLAVE:
p = br_port_get_rtnl(dev);
if (!p)
return 0;
br = p->br;
vg = nbp_vlan_group(p);
break;
default:
return -EINVAL;
}
nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BRIDGE);
if (!nest)
return -EMSGSIZE;
if (vg) {
u16 pvid;
pvid = br_get_pvid(vg);
list_for_each_entry(v, &vg->vlan_list, vlist) {
struct bridge_vlan_xstats vxi;
struct br_vlan_stats stats;
if (++vl_idx < *prividx)
continue;
memset(&vxi, 0, sizeof(vxi));
vxi.vid = v->vid;
vxi.flags = v->flags;
if (v->vid == pvid)
vxi.flags |= BRIDGE_VLAN_INFO_PVID;
br_vlan_get_stats(v, &stats);
vxi.rx_bytes = stats.rx_bytes;
vxi.rx_packets = stats.rx_packets;
vxi.tx_bytes = stats.tx_bytes;
vxi.tx_packets = stats.tx_packets;
if (nla_put(skb, BRIDGE_XSTATS_VLAN, sizeof(vxi), &vxi))
goto nla_put_failure;
}
}
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
if (++vl_idx >= *prividx) {
nla = nla_reserve_64bit(skb, BRIDGE_XSTATS_MCAST,
sizeof(struct br_mcast_stats),
BRIDGE_XSTATS_PAD);
if (!nla)
goto nla_put_failure;
br_multicast_get_stats(br, p, nla_data(nla));
}
#endif
nla_nest_end(skb, nest);
*prividx = 0;
return 0;
nla_put_failure:
nla_nest_end(skb, nest);
*prividx = vl_idx;
return -EMSGSIZE;
}
static struct rtnl_af_ops br_af_ops __read_mostly = {
.family = AF_BRIDGE,
.get_link_af_size = br_get_link_af_size_filtered,
};
struct rtnl_link_ops br_link_ops __read_mostly = {
.kind = "bridge",
.priv_size = sizeof(struct net_bridge),
.setup = br_dev_setup,
.maxtype = IFLA_BR_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,
.fill_linkxstats = br_fill_linkxstats,
.get_linkxstats_size = br_get_linkxstats_size,
.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);
}
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