static int br_pass_frame_up(struct sk_buff *skb)
{
struct net_device *indev, *brdev = BR_INPUT_SKB_CB(skb)->brdev;
struct net_bridge *br = netdev_priv(brdev);
struct br_cpu_netstats *brstats = this_cpu_ptr(br->stats);
u64_stats_update_begin(&brstats->syncp);
brstats->rx_packets++;
brstats->rx_bytes += skb->len;
u64_stats_update_end(&brstats->syncp);
/* Bridge is just like any other port. Make sure the
* packet is allowed except in promisc modue when someone
* may be running packet capture.
*/
if (!(brdev->flags & IFF_PROMISC) &&
!br_allowed_egress(br, br_get_vlan_info(br), skb)) {
kfree_skb(skb);
return NET_RX_DROP;
}
skb = br_handle_vlan(br, br_get_vlan_info(br), skb);
if (!skb)
return NET_RX_DROP;
indev = skb->dev;
skb->dev = brdev;
return NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_IN, skb, indev, NULL,
netif_receive_skb);
}
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_rcu(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));
}
/*
* 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->iflink &&
nla_put_u32(skb, IFLA_LINK, dev->iflink)))
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) {
struct nlattr *af;
const struct net_port_vlans *pv;
struct bridge_vlan_info vinfo;
u16 vid;
u16 pvid;
if (port)
pv = nbp_get_vlan_info(port);
else
pv = br_get_vlan_info(br);
if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN))
goto done;
af = nla_nest_start(skb, IFLA_AF_SPEC);
if (!af)
goto nla_put_failure;
pvid = br_get_pvid(pv);
for (vid = find_first_bit(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN);
vid < BR_VLAN_BITMAP_LEN;
vid = find_next_bit(pv->vlan_bitmap,
BR_VLAN_BITMAP_LEN, vid+1)) {
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;
}
nla_nest_end(skb, af);
}
done:
return nlmsg_end(skb, nlh);
nla_put_failure:
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}
