Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Bridge netlink control interface |
| 3 | * |
| 4 | * Authors: |
| 5 | * Stephen Hemminger <shemminger@osdl.org> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 14 | #include <linux/slab.h> |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 15 | #include <linux/etherdevice.h> |
Thomas Graf | 32fe21c | 2007-03-22 11:59:03 -0700 | [diff] [blame] | 16 | #include <net/rtnetlink.h> |
Eric W. Biederman | 881d966 | 2007-09-17 11:56:21 -0700 | [diff] [blame] | 17 | #include <net/net_namespace.h> |
Denis V. Lunev | b854272 | 2007-12-01 00:21:31 +1100 | [diff] [blame] | 18 | #include <net/sock.h> |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 19 | #include <uapi/linux/if_bridge.h> |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 20 | |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 21 | #include "br_private.h" |
Vitalii Demianets | b03b6dd | 2011-11-25 00:16:37 +0000 | [diff] [blame] | 22 | #include "br_private_stp.h" |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 23 | |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 24 | static inline size_t br_port_info_size(void) |
| 25 | { |
| 26 | return nla_total_size(1) /* IFLA_BRPORT_STATE */ |
| 27 | + nla_total_size(2) /* IFLA_BRPORT_PRIORITY */ |
| 28 | + nla_total_size(4) /* IFLA_BRPORT_COST */ |
| 29 | + nla_total_size(1) /* IFLA_BRPORT_MODE */ |
stephen hemminger | a2e01a6 | 2012-11-13 07:53:07 +0000 | [diff] [blame] | 30 | + nla_total_size(1) /* IFLA_BRPORT_GUARD */ |
stephen hemminger | 1007dd1 | 2012-11-13 07:53:08 +0000 | [diff] [blame] | 31 | + nla_total_size(1) /* IFLA_BRPORT_PROTECT */ |
stephen hemminger | 3da889b | 2013-03-11 13:52:17 +0000 | [diff] [blame] | 32 | + nla_total_size(1) /* IFLA_BRPORT_FAST_LEAVE */ |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 33 | + 0; |
| 34 | } |
| 35 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 36 | static inline size_t br_nlmsg_size(void) |
| 37 | { |
| 38 | return NLMSG_ALIGN(sizeof(struct ifinfomsg)) |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 39 | + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ |
| 40 | + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ |
| 41 | + nla_total_size(4) /* IFLA_MASTER */ |
| 42 | + nla_total_size(4) /* IFLA_MTU */ |
| 43 | + nla_total_size(4) /* IFLA_LINK */ |
| 44 | + nla_total_size(1) /* IFLA_OPERSTATE */ |
| 45 | + nla_total_size(br_port_info_size()); /* IFLA_PROTINFO */ |
| 46 | } |
| 47 | |
| 48 | static int br_port_fill_attrs(struct sk_buff *skb, |
| 49 | const struct net_bridge_port *p) |
| 50 | { |
| 51 | u8 mode = !!(p->flags & BR_HAIRPIN_MODE); |
| 52 | |
| 53 | if (nla_put_u8(skb, IFLA_BRPORT_STATE, p->state) || |
| 54 | nla_put_u16(skb, IFLA_BRPORT_PRIORITY, p->priority) || |
| 55 | nla_put_u32(skb, IFLA_BRPORT_COST, p->path_cost) || |
stephen hemminger | a2e01a6 | 2012-11-13 07:53:07 +0000 | [diff] [blame] | 56 | nla_put_u8(skb, IFLA_BRPORT_MODE, mode) || |
stephen hemminger | 1007dd1 | 2012-11-13 07:53:08 +0000 | [diff] [blame] | 57 | nla_put_u8(skb, IFLA_BRPORT_GUARD, !!(p->flags & BR_BPDU_GUARD)) || |
David S. Miller | c2d3bab | 2012-12-05 16:24:45 -0500 | [diff] [blame] | 58 | nla_put_u8(skb, IFLA_BRPORT_PROTECT, !!(p->flags & BR_ROOT_BLOCK)) || |
| 59 | nla_put_u8(skb, IFLA_BRPORT_FAST_LEAVE, !!(p->flags & BR_MULTICAST_FAST_LEAVE))) |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 60 | return -EMSGSIZE; |
| 61 | |
| 62 | return 0; |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 63 | } |
| 64 | |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 65 | /* |
| 66 | * Create one netlink message for one interface |
| 67 | * Contains port and master info as well as carrier and bridge state. |
| 68 | */ |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 69 | static int br_fill_ifinfo(struct sk_buff *skb, |
| 70 | const struct net_bridge_port *port, |
| 71 | u32 pid, u32 seq, int event, unsigned int flags, |
| 72 | u32 filter_mask, const struct net_device *dev) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 73 | { |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 74 | const struct net_bridge *br; |
Thomas Graf | 7468596 | 2006-11-20 16:20:22 -0800 | [diff] [blame] | 75 | struct ifinfomsg *hdr; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 76 | struct nlmsghdr *nlh; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 77 | u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 78 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 79 | if (port) |
| 80 | br = port->br; |
| 81 | else |
| 82 | br = netdev_priv(dev); |
| 83 | |
stephen hemminger | 28a16c9 | 2010-05-10 09:31:09 +0000 | [diff] [blame] | 84 | br_debug(br, "br_fill_info event %d port %s master %s\n", |
| 85 | event, dev->name, br->dev->name); |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 86 | |
Thomas Graf | 7468596 | 2006-11-20 16:20:22 -0800 | [diff] [blame] | 87 | nlh = nlmsg_put(skb, pid, seq, event, sizeof(*hdr), flags); |
| 88 | if (nlh == NULL) |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 89 | return -EMSGSIZE; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 90 | |
Thomas Graf | 7468596 | 2006-11-20 16:20:22 -0800 | [diff] [blame] | 91 | hdr = nlmsg_data(nlh); |
| 92 | hdr->ifi_family = AF_BRIDGE; |
| 93 | hdr->__ifi_pad = 0; |
| 94 | hdr->ifi_type = dev->type; |
| 95 | hdr->ifi_index = dev->ifindex; |
| 96 | hdr->ifi_flags = dev_get_flags(dev); |
| 97 | hdr->ifi_change = 0; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 98 | |
David S. Miller | 2eb812e | 2012-04-01 20:49:54 -0400 | [diff] [blame] | 99 | if (nla_put_string(skb, IFLA_IFNAME, dev->name) || |
| 100 | nla_put_u32(skb, IFLA_MASTER, br->dev->ifindex) || |
| 101 | nla_put_u32(skb, IFLA_MTU, dev->mtu) || |
| 102 | nla_put_u8(skb, IFLA_OPERSTATE, operstate) || |
| 103 | (dev->addr_len && |
| 104 | nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || |
| 105 | (dev->ifindex != dev->iflink && |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 106 | nla_put_u32(skb, IFLA_LINK, dev->iflink))) |
David S. Miller | 2eb812e | 2012-04-01 20:49:54 -0400 | [diff] [blame] | 107 | goto nla_put_failure; |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 108 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 109 | if (event == RTM_NEWLINK && port) { |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 110 | struct nlattr *nest |
| 111 | = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); |
| 112 | |
| 113 | if (nest == NULL || br_port_fill_attrs(skb, port) < 0) |
| 114 | goto nla_put_failure; |
| 115 | nla_nest_end(skb, nest); |
| 116 | } |
| 117 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 118 | /* Check if the VID information is requested */ |
| 119 | if (filter_mask & RTEXT_FILTER_BRVLAN) { |
| 120 | struct nlattr *af; |
| 121 | const struct net_port_vlans *pv; |
| 122 | struct bridge_vlan_info vinfo; |
| 123 | u16 vid; |
Vlad Yasevich | 552406c | 2013-02-13 12:00:15 +0000 | [diff] [blame] | 124 | u16 pvid; |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 125 | |
| 126 | if (port) |
| 127 | pv = nbp_get_vlan_info(port); |
| 128 | else |
| 129 | pv = br_get_vlan_info(br); |
| 130 | |
| 131 | if (!pv || bitmap_empty(pv->vlan_bitmap, BR_VLAN_BITMAP_LEN)) |
| 132 | goto done; |
| 133 | |
| 134 | af = nla_nest_start(skb, IFLA_AF_SPEC); |
| 135 | if (!af) |
| 136 | goto nla_put_failure; |
| 137 | |
Vlad Yasevich | 552406c | 2013-02-13 12:00:15 +0000 | [diff] [blame] | 138 | pvid = br_get_pvid(pv); |
Wei Yongjun | 74694e7 | 2013-03-11 05:45:23 +0000 | [diff] [blame] | 139 | for_each_set_bit(vid, pv->vlan_bitmap, BR_VLAN_BITMAP_LEN) { |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 140 | vinfo.vid = vid; |
| 141 | vinfo.flags = 0; |
Vlad Yasevich | 552406c | 2013-02-13 12:00:15 +0000 | [diff] [blame] | 142 | if (vid == pvid) |
| 143 | vinfo.flags |= BRIDGE_VLAN_INFO_PVID; |
Vlad Yasevich | 35e03f3 | 2013-02-13 12:00:20 +0000 | [diff] [blame] | 144 | |
| 145 | if (test_bit(vid, pv->untagged_bitmap)) |
| 146 | vinfo.flags |= BRIDGE_VLAN_INFO_UNTAGGED; |
| 147 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 148 | if (nla_put(skb, IFLA_BRIDGE_VLAN_INFO, |
| 149 | sizeof(vinfo), &vinfo)) |
| 150 | goto nla_put_failure; |
| 151 | } |
| 152 | |
| 153 | nla_nest_end(skb, af); |
| 154 | } |
| 155 | |
| 156 | done: |
Thomas Graf | 7468596 | 2006-11-20 16:20:22 -0800 | [diff] [blame] | 157 | return nlmsg_end(skb, nlh); |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 158 | |
Thomas Graf | 7468596 | 2006-11-20 16:20:22 -0800 | [diff] [blame] | 159 | nla_put_failure: |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 160 | nlmsg_cancel(skb, nlh); |
| 161 | return -EMSGSIZE; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | /* |
| 165 | * Notify listeners of a change in port information |
| 166 | */ |
| 167 | void br_ifinfo_notify(int event, struct net_bridge_port *port) |
| 168 | { |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 169 | struct net *net; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 170 | struct sk_buff *skb; |
Thomas Graf | 280a306 | 2006-08-15 00:36:28 -0700 | [diff] [blame] | 171 | int err = -ENOBUFS; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 172 | |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 173 | if (!port) |
| 174 | return; |
| 175 | |
| 176 | net = dev_net(port->dev); |
stephen hemminger | 28a16c9 | 2010-05-10 09:31:09 +0000 | [diff] [blame] | 177 | br_debug(port->br, "port %u(%s) event %d\n", |
Eric Dumazet | 95c9617 | 2012-04-15 05:58:06 +0000 | [diff] [blame] | 178 | (unsigned int)port->port_no, port->dev->name, event); |
stephen hemminger | 28a16c9 | 2010-05-10 09:31:09 +0000 | [diff] [blame] | 179 | |
Thomas Graf | 339bf98 | 2006-11-10 14:10:15 -0800 | [diff] [blame] | 180 | skb = nlmsg_new(br_nlmsg_size(), GFP_ATOMIC); |
Thomas Graf | 280a306 | 2006-08-15 00:36:28 -0700 | [diff] [blame] | 181 | if (skb == NULL) |
| 182 | goto errout; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 183 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 184 | err = br_fill_ifinfo(skb, port, 0, 0, event, 0, 0, port->dev); |
Patrick McHardy | 2693256 | 2007-01-31 23:16:40 -0800 | [diff] [blame] | 185 | if (err < 0) { |
| 186 | /* -EMSGSIZE implies BUG in br_nlmsg_size() */ |
| 187 | WARN_ON(err == -EMSGSIZE); |
| 188 | kfree_skb(skb); |
| 189 | goto errout; |
| 190 | } |
Pablo Neira Ayuso | 1ce85fe | 2009-02-24 23:18:28 -0800 | [diff] [blame] | 191 | rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); |
| 192 | return; |
Thomas Graf | 280a306 | 2006-08-15 00:36:28 -0700 | [diff] [blame] | 193 | errout: |
Stephen Hemminger | bea1b42 | 2006-08-03 16:24:02 -0700 | [diff] [blame] | 194 | if (err < 0) |
Alexey Dobriyan | 4aa678b | 2008-09-08 16:19:58 -0700 | [diff] [blame] | 195 | rtnl_set_sk_err(net, RTNLGRP_LINK, err); |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 196 | } |
| 197 | |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 198 | |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 199 | /* |
| 200 | * Dump information about all ports, in response to GETLINK |
| 201 | */ |
John Fastabend | e5a55a8 | 2012-10-24 08:12:57 +0000 | [diff] [blame] | 202 | int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 203 | struct net_device *dev, u32 filter_mask) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 204 | { |
John Fastabend | e5a55a8 | 2012-10-24 08:12:57 +0000 | [diff] [blame] | 205 | int err = 0; |
| 206 | struct net_bridge_port *port = br_port_get_rcu(dev); |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 207 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 208 | /* not a bridge port and */ |
| 209 | if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN)) |
John Fastabend | e5a55a8 | 2012-10-24 08:12:57 +0000 | [diff] [blame] | 210 | goto out; |
stephen hemminger | b5ed54e | 2010-11-15 06:38:13 +0000 | [diff] [blame] | 211 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 212 | err = br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, NLM_F_MULTI, |
| 213 | filter_mask, dev); |
John Fastabend | e5a55a8 | 2012-10-24 08:12:57 +0000 | [diff] [blame] | 214 | out: |
| 215 | return err; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 216 | } |
| 217 | |
Cong Wang | 15004ca | 2013-02-13 19:57:12 +0000 | [diff] [blame] | 218 | static const struct nla_policy ifla_br_policy[IFLA_MAX+1] = { |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 219 | [IFLA_BRIDGE_FLAGS] = { .type = NLA_U16 }, |
| 220 | [IFLA_BRIDGE_MODE] = { .type = NLA_U16 }, |
| 221 | [IFLA_BRIDGE_VLAN_INFO] = { .type = NLA_BINARY, |
| 222 | .len = sizeof(struct bridge_vlan_info), }, |
| 223 | }; |
| 224 | |
| 225 | static int br_afspec(struct net_bridge *br, |
| 226 | struct net_bridge_port *p, |
| 227 | struct nlattr *af_spec, |
| 228 | int cmd) |
| 229 | { |
| 230 | struct nlattr *tb[IFLA_BRIDGE_MAX+1]; |
| 231 | int err = 0; |
| 232 | |
| 233 | err = nla_parse_nested(tb, IFLA_BRIDGE_MAX, af_spec, ifla_br_policy); |
| 234 | if (err) |
| 235 | return err; |
| 236 | |
| 237 | if (tb[IFLA_BRIDGE_VLAN_INFO]) { |
| 238 | struct bridge_vlan_info *vinfo; |
| 239 | |
| 240 | vinfo = nla_data(tb[IFLA_BRIDGE_VLAN_INFO]); |
| 241 | |
| 242 | if (vinfo->vid >= VLAN_N_VID) |
| 243 | return -EINVAL; |
| 244 | |
| 245 | switch (cmd) { |
| 246 | case RTM_SETLINK: |
| 247 | if (p) { |
Vlad Yasevich | 552406c | 2013-02-13 12:00:15 +0000 | [diff] [blame] | 248 | err = nbp_vlan_add(p, vinfo->vid, vinfo->flags); |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 249 | if (err) |
| 250 | break; |
| 251 | |
| 252 | if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) |
Vlad Yasevich | 552406c | 2013-02-13 12:00:15 +0000 | [diff] [blame] | 253 | err = br_vlan_add(p->br, vinfo->vid, |
| 254 | vinfo->flags); |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 255 | } else |
Vlad Yasevich | 552406c | 2013-02-13 12:00:15 +0000 | [diff] [blame] | 256 | err = br_vlan_add(br, vinfo->vid, vinfo->flags); |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 257 | |
| 258 | if (err) |
| 259 | break; |
| 260 | |
| 261 | break; |
| 262 | |
| 263 | case RTM_DELLINK: |
| 264 | if (p) { |
| 265 | nbp_vlan_delete(p, vinfo->vid); |
| 266 | if (vinfo->flags & BRIDGE_VLAN_INFO_MASTER) |
| 267 | br_vlan_delete(p->br, vinfo->vid); |
| 268 | } else |
| 269 | br_vlan_delete(br, vinfo->vid); |
| 270 | break; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | return err; |
| 275 | } |
| 276 | |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 277 | static const struct nla_policy ifla_brport_policy[IFLA_BRPORT_MAX + 1] = { |
| 278 | [IFLA_BRPORT_STATE] = { .type = NLA_U8 }, |
| 279 | [IFLA_BRPORT_COST] = { .type = NLA_U32 }, |
| 280 | [IFLA_BRPORT_PRIORITY] = { .type = NLA_U16 }, |
| 281 | [IFLA_BRPORT_MODE] = { .type = NLA_U8 }, |
stephen hemminger | a2e01a6 | 2012-11-13 07:53:07 +0000 | [diff] [blame] | 282 | [IFLA_BRPORT_GUARD] = { .type = NLA_U8 }, |
stephen hemminger | 1007dd1 | 2012-11-13 07:53:08 +0000 | [diff] [blame] | 283 | [IFLA_BRPORT_PROTECT] = { .type = NLA_U8 }, |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 284 | }; |
| 285 | |
| 286 | /* Change the state of the port and notify spanning tree */ |
| 287 | static int br_set_port_state(struct net_bridge_port *p, u8 state) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 288 | { |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 289 | if (state > BR_STATE_BLOCKING) |
stephen hemminger | b5ed54e | 2010-11-15 06:38:13 +0000 | [diff] [blame] | 290 | return -EINVAL; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 291 | |
| 292 | /* if kernel STP is running, don't allow changes */ |
Stephen Hemminger | 9cde070 | 2007-03-21 14:22:44 -0700 | [diff] [blame] | 293 | if (p->br->stp_enabled == BR_KERNEL_STP) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 294 | return -EBUSY; |
| 295 | |
stephen hemminger | 576eb62 | 2012-12-28 18:15:22 +0000 | [diff] [blame] | 296 | /* if device is not up, change is not allowed |
| 297 | * if link is not present, only allowable state is disabled |
| 298 | */ |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 299 | if (!netif_running(p->dev) || |
stephen hemminger | 576eb62 | 2012-12-28 18:15:22 +0000 | [diff] [blame] | 300 | (!netif_oper_up(p->dev) && state != BR_STATE_DISABLED)) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 301 | return -ENETDOWN; |
| 302 | |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 303 | p->state = state; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 304 | br_log_state(p); |
Vitalii Demianets | b03b6dd | 2011-11-25 00:16:37 +0000 | [diff] [blame] | 305 | br_port_state_selection(p->br); |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 306 | return 0; |
| 307 | } |
| 308 | |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 309 | /* Set/clear or port flags based on attribute */ |
| 310 | static void br_set_port_flag(struct net_bridge_port *p, struct nlattr *tb[], |
| 311 | int attrtype, unsigned long mask) |
| 312 | { |
| 313 | if (tb[attrtype]) { |
| 314 | u8 flag = nla_get_u8(tb[attrtype]); |
| 315 | if (flag) |
| 316 | p->flags |= mask; |
| 317 | else |
| 318 | p->flags &= ~mask; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | /* Process bridge protocol info on port */ |
| 323 | static int br_setport(struct net_bridge_port *p, struct nlattr *tb[]) |
| 324 | { |
| 325 | int err; |
| 326 | |
| 327 | br_set_port_flag(p, tb, IFLA_BRPORT_MODE, BR_HAIRPIN_MODE); |
stephen hemminger | a2e01a6 | 2012-11-13 07:53:07 +0000 | [diff] [blame] | 328 | br_set_port_flag(p, tb, IFLA_BRPORT_GUARD, BR_BPDU_GUARD); |
David S. Miller | c2d3bab | 2012-12-05 16:24:45 -0500 | [diff] [blame] | 329 | br_set_port_flag(p, tb, IFLA_BRPORT_FAST_LEAVE, BR_MULTICAST_FAST_LEAVE); |
Vlad Yasevich | 3d84fa9 | 2013-03-15 06:39:12 +0000 | [diff] [blame] | 330 | br_set_port_flag(p, tb, IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK); |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 331 | |
| 332 | if (tb[IFLA_BRPORT_COST]) { |
| 333 | err = br_stp_set_path_cost(p, nla_get_u32(tb[IFLA_BRPORT_COST])); |
| 334 | if (err) |
| 335 | return err; |
| 336 | } |
| 337 | |
| 338 | if (tb[IFLA_BRPORT_PRIORITY]) { |
| 339 | err = br_stp_set_port_priority(p, nla_get_u16(tb[IFLA_BRPORT_PRIORITY])); |
| 340 | if (err) |
| 341 | return err; |
| 342 | } |
| 343 | |
| 344 | if (tb[IFLA_BRPORT_STATE]) { |
| 345 | err = br_set_port_state(p, nla_get_u8(tb[IFLA_BRPORT_STATE])); |
| 346 | if (err) |
| 347 | return err; |
| 348 | } |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | /* Change state and parameters on port. */ |
| 353 | int br_setlink(struct net_device *dev, struct nlmsghdr *nlh) |
| 354 | { |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 355 | struct nlattr *protinfo; |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 356 | struct nlattr *afspec; |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 357 | struct net_bridge_port *p; |
Dan Carpenter | 2062cc2 | 2012-12-07 01:10:46 +0000 | [diff] [blame] | 358 | struct nlattr *tb[IFLA_BRPORT_MAX + 1]; |
Hong zhi guo | 7b99a99 | 2013-03-24 03:26:47 +0000 | [diff] [blame] | 359 | int err = 0; |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 360 | |
Hong zhi guo | c60ee67 | 2013-03-28 06:21:22 +0000 | [diff] [blame] | 361 | protinfo = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_PROTINFO); |
| 362 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 363 | if (!protinfo && !afspec) |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 364 | return 0; |
| 365 | |
| 366 | p = br_port_get_rtnl(dev); |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 367 | /* We want to accept dev as bridge itself if the AF_SPEC |
| 368 | * is set to see if someone is setting vlan info on the brigde |
| 369 | */ |
Hong zhi guo | 7b99a99 | 2013-03-24 03:26:47 +0000 | [diff] [blame] | 370 | if (!p && !afspec) |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 371 | return -EINVAL; |
| 372 | |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 373 | if (p && protinfo) { |
| 374 | if (protinfo->nla_type & NLA_F_NESTED) { |
| 375 | err = nla_parse_nested(tb, IFLA_BRPORT_MAX, |
| 376 | protinfo, ifla_brport_policy); |
| 377 | if (err) |
| 378 | return err; |
| 379 | |
| 380 | spin_lock_bh(&p->br->lock); |
| 381 | err = br_setport(p, tb); |
| 382 | spin_unlock_bh(&p->br->lock); |
| 383 | } else { |
| 384 | /* Binary compatability with old RSTP */ |
| 385 | if (nla_len(protinfo) < sizeof(u8)) |
| 386 | return -EINVAL; |
| 387 | |
| 388 | spin_lock_bh(&p->br->lock); |
| 389 | err = br_set_port_state(p, nla_get_u8(protinfo)); |
| 390 | spin_unlock_bh(&p->br->lock); |
| 391 | } |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 392 | if (err) |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 393 | goto out; |
| 394 | } |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 395 | |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 396 | if (afspec) { |
| 397 | err = br_afspec((struct net_bridge *)netdev_priv(dev), p, |
| 398 | afspec, RTM_SETLINK); |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | if (err == 0) |
| 402 | br_ifinfo_notify(RTM_NEWLINK, p); |
| 403 | |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 404 | out: |
stephen hemminger | 25c71c7 | 2012-11-13 07:53:05 +0000 | [diff] [blame] | 405 | return err; |
| 406 | } |
| 407 | |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 408 | /* Delete port information */ |
| 409 | int br_dellink(struct net_device *dev, struct nlmsghdr *nlh) |
| 410 | { |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 411 | struct nlattr *afspec; |
| 412 | struct net_bridge_port *p; |
| 413 | int err; |
| 414 | |
Hong zhi guo | c60ee67 | 2013-03-28 06:21:22 +0000 | [diff] [blame] | 415 | afspec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); |
Vlad Yasevich | 407af32 | 2013-02-13 12:00:12 +0000 | [diff] [blame] | 416 | if (!afspec) |
| 417 | return 0; |
| 418 | |
| 419 | p = br_port_get_rtnl(dev); |
| 420 | /* We want to accept dev as bridge itself as well */ |
| 421 | if (!p && !(dev->priv_flags & IFF_EBRIDGE)) |
| 422 | return -EINVAL; |
| 423 | |
| 424 | err = br_afspec((struct net_bridge *)netdev_priv(dev), p, |
| 425 | afspec, RTM_DELLINK); |
| 426 | |
| 427 | return err; |
| 428 | } |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 429 | static int br_validate(struct nlattr *tb[], struct nlattr *data[]) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 430 | { |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 431 | if (tb[IFLA_ADDRESS]) { |
| 432 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) |
| 433 | return -EINVAL; |
| 434 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) |
| 435 | return -EADDRNOTAVAIL; |
| 436 | } |
Thomas Graf | 32fe21c | 2007-03-22 11:59:03 -0700 | [diff] [blame] | 437 | |
| 438 | return 0; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 439 | } |
| 440 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 441 | static size_t br_get_link_af_size(const struct net_device *dev) |
| 442 | { |
| 443 | struct net_port_vlans *pv; |
| 444 | |
| 445 | if (br_port_exists(dev)) |
| 446 | pv = nbp_get_vlan_info(br_port_get_rcu(dev)); |
| 447 | else if (dev->priv_flags & IFF_EBRIDGE) |
| 448 | pv = br_get_vlan_info((struct net_bridge *)netdev_priv(dev)); |
| 449 | else |
| 450 | return 0; |
| 451 | |
| 452 | if (!pv) |
| 453 | return 0; |
| 454 | |
| 455 | /* Each VLAN is returned in bridge_vlan_info along with flags */ |
| 456 | return pv->num_vlans * nla_total_size(sizeof(struct bridge_vlan_info)); |
| 457 | } |
| 458 | |
Cong Wang | 15004ca | 2013-02-13 19:57:12 +0000 | [diff] [blame] | 459 | static struct rtnl_af_ops br_af_ops = { |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 460 | .family = AF_BRIDGE, |
| 461 | .get_link_af_size = br_get_link_af_size, |
| 462 | }; |
| 463 | |
stephen hemminger | 149ddd8 | 2012-06-26 05:48:45 +0000 | [diff] [blame] | 464 | struct rtnl_link_ops br_link_ops __read_mostly = { |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 465 | .kind = "bridge", |
| 466 | .priv_size = sizeof(struct net_bridge), |
| 467 | .setup = br_dev_setup, |
| 468 | .validate = br_validate, |
stephen hemminger | 1ce5cce | 2011-10-06 11:19:41 +0000 | [diff] [blame] | 469 | .dellink = br_dev_delete, |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 470 | }; |
| 471 | |
| 472 | int __init br_netlink_init(void) |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 473 | { |
Vlad Yasevich | 3ec8e9f | 2013-01-02 09:41:25 +0000 | [diff] [blame] | 474 | int err; |
| 475 | |
| 476 | br_mdb_init(); |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 477 | err = rtnl_af_register(&br_af_ops); |
Vlad Yasevich | 3ec8e9f | 2013-01-02 09:41:25 +0000 | [diff] [blame] | 478 | if (err) |
| 479 | goto out; |
| 480 | |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 481 | err = rtnl_link_register(&br_link_ops); |
| 482 | if (err) |
| 483 | goto out_af; |
| 484 | |
Vlad Yasevich | 3ec8e9f | 2013-01-02 09:41:25 +0000 | [diff] [blame] | 485 | return 0; |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 486 | |
| 487 | out_af: |
| 488 | rtnl_af_unregister(&br_af_ops); |
Vlad Yasevich | 3ec8e9f | 2013-01-02 09:41:25 +0000 | [diff] [blame] | 489 | out: |
| 490 | br_mdb_uninit(); |
| 491 | return err; |
Stephen Hemminger | 11dc1f3 | 2006-05-25 16:00:12 -0700 | [diff] [blame] | 492 | } |
| 493 | |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 494 | void __exit br_netlink_fini(void) |
| 495 | { |
Vlad Yasevich | 3ec8e9f | 2013-01-02 09:41:25 +0000 | [diff] [blame] | 496 | br_mdb_uninit(); |
Vlad Yasevich | 6cbdcee | 2013-02-13 12:00:13 +0000 | [diff] [blame] | 497 | rtnl_af_unregister(&br_af_ops); |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 498 | rtnl_link_unregister(&br_link_ops); |
stephen hemminger | bb900b2 | 2011-04-04 14:03:32 +0000 | [diff] [blame] | 499 | } |