1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
7 static int ipvlan_set_port_mode(struct ipvl_port
*port
, u16 nval
,
8 struct netlink_ext_ack
*extack
)
10 struct ipvl_dev
*ipvlan
;
15 if (port
->mode
!= nval
) {
16 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
17 flags
= ipvlan
->dev
->flags
;
18 if (nval
== IPVLAN_MODE_L3
|| nval
== IPVLAN_MODE_L3S
) {
19 err
= dev_change_flags(ipvlan
->dev
,
23 err
= dev_change_flags(ipvlan
->dev
,
30 if (nval
== IPVLAN_MODE_L3S
) {
32 err
= ipvlan_l3s_register(port
);
35 } else if (port
->mode
== IPVLAN_MODE_L3S
) {
36 /* Old mode was L3S */
37 ipvlan_l3s_unregister(port
);
44 /* Undo the flags changes that have been done so far. */
45 list_for_each_entry_continue_reverse(ipvlan
, &port
->ipvlans
, pnode
) {
46 flags
= ipvlan
->dev
->flags
;
47 if (port
->mode
== IPVLAN_MODE_L3
||
48 port
->mode
== IPVLAN_MODE_L3S
)
49 dev_change_flags(ipvlan
->dev
, flags
| IFF_NOARP
,
52 dev_change_flags(ipvlan
->dev
, flags
& ~IFF_NOARP
,
59 static int ipvlan_port_create(struct net_device
*dev
)
61 struct ipvl_port
*port
;
64 port
= kzalloc(sizeof(struct ipvl_port
), GFP_KERNEL
);
68 write_pnet(&port
->pnet
, dev_net(dev
));
70 port
->mode
= IPVLAN_MODE_L3
;
71 INIT_LIST_HEAD(&port
->ipvlans
);
72 for (idx
= 0; idx
< IPVLAN_HASH_SIZE
; idx
++)
73 INIT_HLIST_HEAD(&port
->hlhead
[idx
]);
75 skb_queue_head_init(&port
->backlog
);
76 INIT_WORK(&port
->wq
, ipvlan_process_multicast
);
78 port
->dev_id_start
= 1;
80 err
= netdev_rx_handler_register(dev
, ipvlan_handle_frame
, port
);
91 static void ipvlan_port_destroy(struct net_device
*dev
)
93 struct ipvl_port
*port
= ipvlan_port_get_rtnl(dev
);
96 if (port
->mode
== IPVLAN_MODE_L3S
)
97 ipvlan_l3s_unregister(port
);
98 netdev_rx_handler_unregister(dev
);
99 cancel_work_sync(&port
->wq
);
100 while ((skb
= __skb_dequeue(&port
->backlog
)) != NULL
) {
105 ida_destroy(&port
->ida
);
109 #define IPVLAN_FEATURES \
110 (NETIF_F_SG | NETIF_F_CSUM_MASK | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
111 NETIF_F_GSO | NETIF_F_ALL_TSO | NETIF_F_GSO_ROBUST | \
112 NETIF_F_GRO | NETIF_F_RXCSUM | \
113 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
115 #define IPVLAN_STATE_MASK \
116 ((1<<__LINK_STATE_NOCARRIER) | (1<<__LINK_STATE_DORMANT))
118 static int ipvlan_init(struct net_device
*dev
)
120 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
121 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
122 struct ipvl_port
*port
;
125 dev
->state
= (dev
->state
& ~IPVLAN_STATE_MASK
) |
126 (phy_dev
->state
& IPVLAN_STATE_MASK
);
127 dev
->features
= phy_dev
->features
& IPVLAN_FEATURES
;
128 dev
->features
|= NETIF_F_LLTX
| NETIF_F_VLAN_CHALLENGED
;
129 dev
->hw_enc_features
|= dev
->features
;
130 dev
->gso_max_size
= phy_dev
->gso_max_size
;
131 dev
->gso_max_segs
= phy_dev
->gso_max_segs
;
132 dev
->hard_header_len
= phy_dev
->hard_header_len
;
134 ipvlan
->pcpu_stats
= netdev_alloc_pcpu_stats(struct ipvl_pcpu_stats
);
135 if (!ipvlan
->pcpu_stats
)
138 if (!netif_is_ipvlan_port(phy_dev
)) {
139 err
= ipvlan_port_create(phy_dev
);
141 free_percpu(ipvlan
->pcpu_stats
);
145 port
= ipvlan_port_get_rtnl(phy_dev
);
150 static void ipvlan_uninit(struct net_device
*dev
)
152 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
153 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
154 struct ipvl_port
*port
;
156 free_percpu(ipvlan
->pcpu_stats
);
158 port
= ipvlan_port_get_rtnl(phy_dev
);
161 ipvlan_port_destroy(port
->dev
);
164 static int ipvlan_open(struct net_device
*dev
)
166 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
167 struct ipvl_addr
*addr
;
169 if (ipvlan
->port
->mode
== IPVLAN_MODE_L3
||
170 ipvlan
->port
->mode
== IPVLAN_MODE_L3S
)
171 dev
->flags
|= IFF_NOARP
;
173 dev
->flags
&= ~IFF_NOARP
;
176 list_for_each_entry_rcu(addr
, &ipvlan
->addrs
, anode
)
177 ipvlan_ht_addr_add(ipvlan
, addr
);
183 static int ipvlan_stop(struct net_device
*dev
)
185 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
186 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
187 struct ipvl_addr
*addr
;
189 dev_uc_unsync(phy_dev
, dev
);
190 dev_mc_unsync(phy_dev
, dev
);
193 list_for_each_entry_rcu(addr
, &ipvlan
->addrs
, anode
)
194 ipvlan_ht_addr_del(addr
);
200 static netdev_tx_t
ipvlan_start_xmit(struct sk_buff
*skb
,
201 struct net_device
*dev
)
203 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
204 int skblen
= skb
->len
;
207 ret
= ipvlan_queue_xmit(skb
, dev
);
208 if (likely(ret
== NET_XMIT_SUCCESS
|| ret
== NET_XMIT_CN
)) {
209 struct ipvl_pcpu_stats
*pcptr
;
211 pcptr
= this_cpu_ptr(ipvlan
->pcpu_stats
);
213 u64_stats_update_begin(&pcptr
->syncp
);
215 pcptr
->tx_bytes
+= skblen
;
216 u64_stats_update_end(&pcptr
->syncp
);
218 this_cpu_inc(ipvlan
->pcpu_stats
->tx_drps
);
223 static netdev_features_t
ipvlan_fix_features(struct net_device
*dev
,
224 netdev_features_t features
)
226 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
228 return features
& (ipvlan
->sfeatures
| ~IPVLAN_FEATURES
);
231 static void ipvlan_change_rx_flags(struct net_device
*dev
, int change
)
233 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
234 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
236 if (change
& IFF_ALLMULTI
)
237 dev_set_allmulti(phy_dev
, dev
->flags
& IFF_ALLMULTI
? 1 : -1);
240 static void ipvlan_set_multicast_mac_filter(struct net_device
*dev
)
242 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
244 if (dev
->flags
& (IFF_PROMISC
| IFF_ALLMULTI
)) {
245 bitmap_fill(ipvlan
->mac_filters
, IPVLAN_MAC_FILTER_SIZE
);
247 struct netdev_hw_addr
*ha
;
248 DECLARE_BITMAP(mc_filters
, IPVLAN_MAC_FILTER_SIZE
);
250 bitmap_zero(mc_filters
, IPVLAN_MAC_FILTER_SIZE
);
251 netdev_for_each_mc_addr(ha
, dev
)
252 __set_bit(ipvlan_mac_hash(ha
->addr
), mc_filters
);
254 /* Turn-on broadcast bit irrespective of address family,
255 * since broadcast is deferred to a work-queue, hence no
256 * impact on fast-path processing.
258 __set_bit(ipvlan_mac_hash(dev
->broadcast
), mc_filters
);
260 bitmap_copy(ipvlan
->mac_filters
, mc_filters
,
261 IPVLAN_MAC_FILTER_SIZE
);
263 dev_uc_sync(ipvlan
->phy_dev
, dev
);
264 dev_mc_sync(ipvlan
->phy_dev
, dev
);
267 static void ipvlan_get_stats64(struct net_device
*dev
,
268 struct rtnl_link_stats64
*s
)
270 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
272 if (ipvlan
->pcpu_stats
) {
273 struct ipvl_pcpu_stats
*pcptr
;
274 u64 rx_pkts
, rx_bytes
, rx_mcast
, tx_pkts
, tx_bytes
;
275 u32 rx_errs
= 0, tx_drps
= 0;
279 for_each_possible_cpu(idx
) {
280 pcptr
= per_cpu_ptr(ipvlan
->pcpu_stats
, idx
);
282 strt
= u64_stats_fetch_begin_irq(&pcptr
->syncp
);
283 rx_pkts
= pcptr
->rx_pkts
;
284 rx_bytes
= pcptr
->rx_bytes
;
285 rx_mcast
= pcptr
->rx_mcast
;
286 tx_pkts
= pcptr
->tx_pkts
;
287 tx_bytes
= pcptr
->tx_bytes
;
288 } while (u64_stats_fetch_retry_irq(&pcptr
->syncp
,
291 s
->rx_packets
+= rx_pkts
;
292 s
->rx_bytes
+= rx_bytes
;
293 s
->multicast
+= rx_mcast
;
294 s
->tx_packets
+= tx_pkts
;
295 s
->tx_bytes
+= tx_bytes
;
297 /* u32 values are updated without syncp protection. */
298 rx_errs
+= pcptr
->rx_errs
;
299 tx_drps
+= pcptr
->tx_drps
;
301 s
->rx_errors
= rx_errs
;
302 s
->rx_dropped
= rx_errs
;
303 s
->tx_dropped
= tx_drps
;
307 static int ipvlan_vlan_rx_add_vid(struct net_device
*dev
, __be16 proto
, u16 vid
)
309 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
310 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
312 return vlan_vid_add(phy_dev
, proto
, vid
);
315 static int ipvlan_vlan_rx_kill_vid(struct net_device
*dev
, __be16 proto
,
318 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
319 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
321 vlan_vid_del(phy_dev
, proto
, vid
);
325 static int ipvlan_get_iflink(const struct net_device
*dev
)
327 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
329 return ipvlan
->phy_dev
->ifindex
;
332 static const struct net_device_ops ipvlan_netdev_ops
= {
333 .ndo_init
= ipvlan_init
,
334 .ndo_uninit
= ipvlan_uninit
,
335 .ndo_open
= ipvlan_open
,
336 .ndo_stop
= ipvlan_stop
,
337 .ndo_start_xmit
= ipvlan_start_xmit
,
338 .ndo_fix_features
= ipvlan_fix_features
,
339 .ndo_change_rx_flags
= ipvlan_change_rx_flags
,
340 .ndo_set_rx_mode
= ipvlan_set_multicast_mac_filter
,
341 .ndo_get_stats64
= ipvlan_get_stats64
,
342 .ndo_vlan_rx_add_vid
= ipvlan_vlan_rx_add_vid
,
343 .ndo_vlan_rx_kill_vid
= ipvlan_vlan_rx_kill_vid
,
344 .ndo_get_iflink
= ipvlan_get_iflink
,
347 static int ipvlan_hard_header(struct sk_buff
*skb
, struct net_device
*dev
,
348 unsigned short type
, const void *daddr
,
349 const void *saddr
, unsigned len
)
351 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
352 struct net_device
*phy_dev
= ipvlan
->phy_dev
;
354 /* TODO Probably use a different field than dev_addr so that the
355 * mac-address on the virtual device is portable and can be carried
356 * while the packets use the mac-addr on the physical device.
358 return dev_hard_header(skb
, phy_dev
, type
, daddr
,
359 saddr
? : phy_dev
->dev_addr
, len
);
362 static const struct header_ops ipvlan_header_ops
= {
363 .create
= ipvlan_hard_header
,
364 .parse
= eth_header_parse
,
365 .cache
= eth_header_cache
,
366 .cache_update
= eth_header_cache_update
,
369 static void ipvlan_adjust_mtu(struct ipvl_dev
*ipvlan
, struct net_device
*dev
)
371 ipvlan
->dev
->mtu
= dev
->mtu
;
374 static bool netif_is_ipvlan(const struct net_device
*dev
)
376 /* both ipvlan and ipvtap devices use the same netdev_ops */
377 return dev
->netdev_ops
== &ipvlan_netdev_ops
;
380 static int ipvlan_ethtool_get_link_ksettings(struct net_device
*dev
,
381 struct ethtool_link_ksettings
*cmd
)
383 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
385 return __ethtool_get_link_ksettings(ipvlan
->phy_dev
, cmd
);
388 static void ipvlan_ethtool_get_drvinfo(struct net_device
*dev
,
389 struct ethtool_drvinfo
*drvinfo
)
391 strlcpy(drvinfo
->driver
, IPVLAN_DRV
, sizeof(drvinfo
->driver
));
392 strlcpy(drvinfo
->version
, IPV_DRV_VER
, sizeof(drvinfo
->version
));
395 static u32
ipvlan_ethtool_get_msglevel(struct net_device
*dev
)
397 const struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
399 return ipvlan
->msg_enable
;
402 static void ipvlan_ethtool_set_msglevel(struct net_device
*dev
, u32 value
)
404 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
406 ipvlan
->msg_enable
= value
;
409 static const struct ethtool_ops ipvlan_ethtool_ops
= {
410 .get_link
= ethtool_op_get_link
,
411 .get_link_ksettings
= ipvlan_ethtool_get_link_ksettings
,
412 .get_drvinfo
= ipvlan_ethtool_get_drvinfo
,
413 .get_msglevel
= ipvlan_ethtool_get_msglevel
,
414 .set_msglevel
= ipvlan_ethtool_set_msglevel
,
417 static int ipvlan_nl_changelink(struct net_device
*dev
,
418 struct nlattr
*tb
[], struct nlattr
*data
[],
419 struct netlink_ext_ack
*extack
)
421 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
422 struct ipvl_port
*port
= ipvlan_port_get_rtnl(ipvlan
->phy_dev
);
427 if (!ns_capable(dev_net(ipvlan
->phy_dev
)->user_ns
, CAP_NET_ADMIN
))
430 if (data
[IFLA_IPVLAN_MODE
]) {
431 u16 nmode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
433 err
= ipvlan_set_port_mode(port
, nmode
, extack
);
436 if (!err
&& data
[IFLA_IPVLAN_FLAGS
]) {
437 u16 flags
= nla_get_u16(data
[IFLA_IPVLAN_FLAGS
]);
439 if (flags
& IPVLAN_F_PRIVATE
)
440 ipvlan_mark_private(port
);
442 ipvlan_clear_private(port
);
444 if (flags
& IPVLAN_F_VEPA
)
445 ipvlan_mark_vepa(port
);
447 ipvlan_clear_vepa(port
);
453 static size_t ipvlan_nl_getsize(const struct net_device
*dev
)
456 + nla_total_size(2) /* IFLA_IPVLAN_MODE */
457 + nla_total_size(2) /* IFLA_IPVLAN_FLAGS */
461 static int ipvlan_nl_validate(struct nlattr
*tb
[], struct nlattr
*data
[],
462 struct netlink_ext_ack
*extack
)
467 if (data
[IFLA_IPVLAN_MODE
]) {
468 u16 mode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
470 if (mode
>= IPVLAN_MODE_MAX
)
473 if (data
[IFLA_IPVLAN_FLAGS
]) {
474 u16 flags
= nla_get_u16(data
[IFLA_IPVLAN_FLAGS
]);
476 /* Only two bits are used at this moment. */
477 if (flags
& ~(IPVLAN_F_PRIVATE
| IPVLAN_F_VEPA
))
479 /* Also both flags can't be active at the same time. */
480 if ((flags
& (IPVLAN_F_PRIVATE
| IPVLAN_F_VEPA
)) ==
481 (IPVLAN_F_PRIVATE
| IPVLAN_F_VEPA
))
488 static int ipvlan_nl_fillinfo(struct sk_buff
*skb
,
489 const struct net_device
*dev
)
491 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
492 struct ipvl_port
*port
= ipvlan_port_get_rtnl(ipvlan
->phy_dev
);
499 if (nla_put_u16(skb
, IFLA_IPVLAN_MODE
, port
->mode
))
501 if (nla_put_u16(skb
, IFLA_IPVLAN_FLAGS
, port
->flags
))
510 int ipvlan_link_new(struct net
*src_net
, struct net_device
*dev
,
511 struct nlattr
*tb
[], struct nlattr
*data
[],
512 struct netlink_ext_ack
*extack
)
514 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
515 struct ipvl_port
*port
;
516 struct net_device
*phy_dev
;
518 u16 mode
= IPVLAN_MODE_L3
;
523 phy_dev
= __dev_get_by_index(src_net
, nla_get_u32(tb
[IFLA_LINK
]));
527 if (netif_is_ipvlan(phy_dev
)) {
528 struct ipvl_dev
*tmp
= netdev_priv(phy_dev
);
530 phy_dev
= tmp
->phy_dev
;
531 if (!ns_capable(dev_net(phy_dev
)->user_ns
, CAP_NET_ADMIN
))
533 } else if (!netif_is_ipvlan_port(phy_dev
)) {
534 /* Exit early if the underlying link is invalid or busy */
535 if (phy_dev
->type
!= ARPHRD_ETHER
||
536 phy_dev
->flags
& IFF_LOOPBACK
) {
538 "Master is either lo or non-ether device\n");
542 if (netdev_is_rx_handler_busy(phy_dev
)) {
543 netdev_err(phy_dev
, "Device is already in use.\n");
548 ipvlan
->phy_dev
= phy_dev
;
550 ipvlan
->sfeatures
= IPVLAN_FEATURES
;
552 ipvlan_adjust_mtu(ipvlan
, phy_dev
);
553 INIT_LIST_HEAD(&ipvlan
->addrs
);
554 spin_lock_init(&ipvlan
->addrs_lock
);
556 /* TODO Probably put random address here to be presented to the
557 * world but keep using the physical-dev address for the outgoing
560 memcpy(dev
->dev_addr
, phy_dev
->dev_addr
, ETH_ALEN
);
562 dev
->priv_flags
|= IFF_NO_RX_HANDLER
;
564 err
= register_netdevice(dev
);
568 /* ipvlan_init() would have created the port, if required */
569 port
= ipvlan_port_get_rtnl(phy_dev
);
572 /* If the port-id base is at the MAX value, then wrap it around and
573 * begin from 0x1 again. This may be due to a busy system where lots
574 * of slaves are getting created and deleted.
576 if (port
->dev_id_start
== 0xFFFE)
577 port
->dev_id_start
= 0x1;
579 /* Since L2 address is shared among all IPvlan slaves including
580 * master, use unique 16 bit dev-ids to diffentiate among them.
581 * Assign IDs between 0x1 and 0xFFFE (used by the master) to each
582 * slave link [see addrconf_ifid_eui48()].
584 err
= ida_simple_get(&port
->ida
, port
->dev_id_start
, 0xFFFE,
587 err
= ida_simple_get(&port
->ida
, 0x1, port
->dev_id_start
,
590 goto unregister_netdev
;
593 /* Increment id-base to the next slot for the future assignment */
594 port
->dev_id_start
= err
+ 1;
596 err
= netdev_upper_dev_link(phy_dev
, dev
, extack
);
600 /* Flags are per port and latest update overrides. User has
601 * to be consistent in setting it just like the mode attribute.
603 if (data
&& data
[IFLA_IPVLAN_FLAGS
])
604 port
->flags
= nla_get_u16(data
[IFLA_IPVLAN_FLAGS
]);
606 if (data
&& data
[IFLA_IPVLAN_MODE
])
607 mode
= nla_get_u16(data
[IFLA_IPVLAN_MODE
]);
609 err
= ipvlan_set_port_mode(port
, mode
, extack
);
613 list_add_tail_rcu(&ipvlan
->pnode
, &port
->ipvlans
);
614 netif_stacked_transfer_operstate(phy_dev
, dev
);
618 netdev_upper_dev_unlink(phy_dev
, dev
);
620 ida_simple_remove(&port
->ida
, dev
->dev_id
);
622 unregister_netdevice(dev
);
625 EXPORT_SYMBOL_GPL(ipvlan_link_new
);
627 void ipvlan_link_delete(struct net_device
*dev
, struct list_head
*head
)
629 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
630 struct ipvl_addr
*addr
, *next
;
632 spin_lock_bh(&ipvlan
->addrs_lock
);
633 list_for_each_entry_safe(addr
, next
, &ipvlan
->addrs
, anode
) {
634 ipvlan_ht_addr_del(addr
);
635 list_del_rcu(&addr
->anode
);
636 kfree_rcu(addr
, rcu
);
638 spin_unlock_bh(&ipvlan
->addrs_lock
);
640 ida_simple_remove(&ipvlan
->port
->ida
, dev
->dev_id
);
641 list_del_rcu(&ipvlan
->pnode
);
642 unregister_netdevice_queue(dev
, head
);
643 netdev_upper_dev_unlink(ipvlan
->phy_dev
, dev
);
645 EXPORT_SYMBOL_GPL(ipvlan_link_delete
);
647 void ipvlan_link_setup(struct net_device
*dev
)
651 dev
->max_mtu
= ETH_MAX_MTU
;
652 dev
->priv_flags
&= ~(IFF_XMIT_DST_RELEASE
| IFF_TX_SKB_SHARING
);
653 dev
->priv_flags
|= IFF_UNICAST_FLT
| IFF_NO_QUEUE
;
654 dev
->netdev_ops
= &ipvlan_netdev_ops
;
655 dev
->needs_free_netdev
= true;
656 dev
->header_ops
= &ipvlan_header_ops
;
657 dev
->ethtool_ops
= &ipvlan_ethtool_ops
;
659 EXPORT_SYMBOL_GPL(ipvlan_link_setup
);
661 static const struct nla_policy ipvlan_nl_policy
[IFLA_IPVLAN_MAX
+ 1] =
663 [IFLA_IPVLAN_MODE
] = { .type
= NLA_U16
},
664 [IFLA_IPVLAN_FLAGS
] = { .type
= NLA_U16
},
667 static struct rtnl_link_ops ipvlan_link_ops
= {
669 .priv_size
= sizeof(struct ipvl_dev
),
671 .setup
= ipvlan_link_setup
,
672 .newlink
= ipvlan_link_new
,
673 .dellink
= ipvlan_link_delete
,
676 int ipvlan_link_register(struct rtnl_link_ops
*ops
)
678 ops
->get_size
= ipvlan_nl_getsize
;
679 ops
->policy
= ipvlan_nl_policy
;
680 ops
->validate
= ipvlan_nl_validate
;
681 ops
->fill_info
= ipvlan_nl_fillinfo
;
682 ops
->changelink
= ipvlan_nl_changelink
;
683 ops
->maxtype
= IFLA_IPVLAN_MAX
;
684 return rtnl_link_register(ops
);
686 EXPORT_SYMBOL_GPL(ipvlan_link_register
);
688 static int ipvlan_device_event(struct notifier_block
*unused
,
689 unsigned long event
, void *ptr
)
691 struct netlink_ext_ack
*extack
= netdev_notifier_info_to_extack(ptr
);
692 struct netdev_notifier_pre_changeaddr_info
*prechaddr_info
;
693 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
694 struct ipvl_dev
*ipvlan
, *next
;
695 struct ipvl_port
*port
;
699 if (!netif_is_ipvlan_port(dev
))
702 port
= ipvlan_port_get_rtnl(dev
);
706 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
)
707 netif_stacked_transfer_operstate(ipvlan
->phy_dev
,
711 case NETDEV_REGISTER
: {
712 struct net
*oldnet
, *newnet
= dev_net(dev
);
714 oldnet
= read_pnet(&port
->pnet
);
715 if (net_eq(newnet
, oldnet
))
718 write_pnet(&port
->pnet
, newnet
);
720 ipvlan_migrate_l3s_hook(oldnet
, newnet
);
723 case NETDEV_UNREGISTER
:
724 if (dev
->reg_state
!= NETREG_UNREGISTERING
)
727 list_for_each_entry_safe(ipvlan
, next
, &port
->ipvlans
, pnode
)
728 ipvlan
->dev
->rtnl_link_ops
->dellink(ipvlan
->dev
,
730 unregister_netdevice_many(&lst_kill
);
733 case NETDEV_FEAT_CHANGE
:
734 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
735 ipvlan
->dev
->features
= dev
->features
& IPVLAN_FEATURES
;
736 ipvlan
->dev
->gso_max_size
= dev
->gso_max_size
;
737 ipvlan
->dev
->gso_max_segs
= dev
->gso_max_segs
;
738 netdev_features_change(ipvlan
->dev
);
742 case NETDEV_CHANGEMTU
:
743 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
)
744 ipvlan_adjust_mtu(ipvlan
, dev
);
747 case NETDEV_PRE_CHANGEADDR
:
748 prechaddr_info
= ptr
;
749 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
750 err
= dev_pre_changeaddr_notify(ipvlan
->dev
,
751 prechaddr_info
->dev_addr
,
754 return notifier_from_errno(err
);
758 case NETDEV_CHANGEADDR
:
759 list_for_each_entry(ipvlan
, &port
->ipvlans
, pnode
) {
760 ether_addr_copy(ipvlan
->dev
->dev_addr
, dev
->dev_addr
);
761 call_netdevice_notifiers(NETDEV_CHANGEADDR
, ipvlan
->dev
);
765 case NETDEV_PRE_TYPE_CHANGE
:
766 /* Forbid underlying device to change its type. */
772 /* the caller must held the addrs lock */
773 static int ipvlan_add_addr(struct ipvl_dev
*ipvlan
, void *iaddr
, bool is_v6
)
775 struct ipvl_addr
*addr
;
777 addr
= kzalloc(sizeof(struct ipvl_addr
), GFP_ATOMIC
);
781 addr
->master
= ipvlan
;
783 memcpy(&addr
->ip4addr
, iaddr
, sizeof(struct in_addr
));
784 addr
->atype
= IPVL_IPV4
;
785 #if IS_ENABLED(CONFIG_IPV6)
787 memcpy(&addr
->ip6addr
, iaddr
, sizeof(struct in6_addr
));
788 addr
->atype
= IPVL_IPV6
;
792 list_add_tail_rcu(&addr
->anode
, &ipvlan
->addrs
);
794 /* If the interface is not up, the address will be added to the hash
795 * list by ipvlan_open.
797 if (netif_running(ipvlan
->dev
))
798 ipvlan_ht_addr_add(ipvlan
, addr
);
803 static void ipvlan_del_addr(struct ipvl_dev
*ipvlan
, void *iaddr
, bool is_v6
)
805 struct ipvl_addr
*addr
;
807 spin_lock_bh(&ipvlan
->addrs_lock
);
808 addr
= ipvlan_find_addr(ipvlan
, iaddr
, is_v6
);
810 spin_unlock_bh(&ipvlan
->addrs_lock
);
814 ipvlan_ht_addr_del(addr
);
815 list_del_rcu(&addr
->anode
);
816 spin_unlock_bh(&ipvlan
->addrs_lock
);
817 kfree_rcu(addr
, rcu
);
820 static bool ipvlan_is_valid_dev(const struct net_device
*dev
)
822 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
824 if (!netif_is_ipvlan(dev
))
827 if (!ipvlan
|| !ipvlan
->port
)
833 #if IS_ENABLED(CONFIG_IPV6)
834 static int ipvlan_add_addr6(struct ipvl_dev
*ipvlan
, struct in6_addr
*ip6_addr
)
838 spin_lock_bh(&ipvlan
->addrs_lock
);
839 if (ipvlan_addr_busy(ipvlan
->port
, ip6_addr
, true))
840 netif_err(ipvlan
, ifup
, ipvlan
->dev
,
841 "Failed to add IPv6=%pI6c addr for %s intf\n",
842 ip6_addr
, ipvlan
->dev
->name
);
844 ret
= ipvlan_add_addr(ipvlan
, ip6_addr
, true);
845 spin_unlock_bh(&ipvlan
->addrs_lock
);
849 static void ipvlan_del_addr6(struct ipvl_dev
*ipvlan
, struct in6_addr
*ip6_addr
)
851 return ipvlan_del_addr(ipvlan
, ip6_addr
, true);
854 static int ipvlan_addr6_event(struct notifier_block
*unused
,
855 unsigned long event
, void *ptr
)
857 struct inet6_ifaddr
*if6
= (struct inet6_ifaddr
*)ptr
;
858 struct net_device
*dev
= (struct net_device
*)if6
->idev
->dev
;
859 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
861 if (!ipvlan_is_valid_dev(dev
))
866 if (ipvlan_add_addr6(ipvlan
, &if6
->addr
))
871 ipvlan_del_addr6(ipvlan
, &if6
->addr
);
878 static int ipvlan_addr6_validator_event(struct notifier_block
*unused
,
879 unsigned long event
, void *ptr
)
881 struct in6_validator_info
*i6vi
= (struct in6_validator_info
*)ptr
;
882 struct net_device
*dev
= (struct net_device
*)i6vi
->i6vi_dev
->dev
;
883 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
885 if (!ipvlan_is_valid_dev(dev
))
890 if (ipvlan_addr_busy(ipvlan
->port
, &i6vi
->i6vi_addr
, true)) {
891 NL_SET_ERR_MSG(i6vi
->extack
,
892 "Address already assigned to an ipvlan device");
893 return notifier_from_errno(-EADDRINUSE
);
902 static int ipvlan_add_addr4(struct ipvl_dev
*ipvlan
, struct in_addr
*ip4_addr
)
906 spin_lock_bh(&ipvlan
->addrs_lock
);
907 if (ipvlan_addr_busy(ipvlan
->port
, ip4_addr
, false))
908 netif_err(ipvlan
, ifup
, ipvlan
->dev
,
909 "Failed to add IPv4=%pI4 on %s intf.\n",
910 ip4_addr
, ipvlan
->dev
->name
);
912 ret
= ipvlan_add_addr(ipvlan
, ip4_addr
, false);
913 spin_unlock_bh(&ipvlan
->addrs_lock
);
917 static void ipvlan_del_addr4(struct ipvl_dev
*ipvlan
, struct in_addr
*ip4_addr
)
919 return ipvlan_del_addr(ipvlan
, ip4_addr
, false);
922 static int ipvlan_addr4_event(struct notifier_block
*unused
,
923 unsigned long event
, void *ptr
)
925 struct in_ifaddr
*if4
= (struct in_ifaddr
*)ptr
;
926 struct net_device
*dev
= (struct net_device
*)if4
->ifa_dev
->dev
;
927 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
928 struct in_addr ip4_addr
;
930 if (!ipvlan_is_valid_dev(dev
))
935 ip4_addr
.s_addr
= if4
->ifa_address
;
936 if (ipvlan_add_addr4(ipvlan
, &ip4_addr
))
941 ip4_addr
.s_addr
= if4
->ifa_address
;
942 ipvlan_del_addr4(ipvlan
, &ip4_addr
);
949 static int ipvlan_addr4_validator_event(struct notifier_block
*unused
,
950 unsigned long event
, void *ptr
)
952 struct in_validator_info
*ivi
= (struct in_validator_info
*)ptr
;
953 struct net_device
*dev
= (struct net_device
*)ivi
->ivi_dev
->dev
;
954 struct ipvl_dev
*ipvlan
= netdev_priv(dev
);
956 if (!ipvlan_is_valid_dev(dev
))
961 if (ipvlan_addr_busy(ipvlan
->port
, &ivi
->ivi_addr
, false)) {
962 NL_SET_ERR_MSG(ivi
->extack
,
963 "Address already assigned to an ipvlan device");
964 return notifier_from_errno(-EADDRINUSE
);
972 static struct notifier_block ipvlan_addr4_notifier_block __read_mostly
= {
973 .notifier_call
= ipvlan_addr4_event
,
976 static struct notifier_block ipvlan_addr4_vtor_notifier_block __read_mostly
= {
977 .notifier_call
= ipvlan_addr4_validator_event
,
980 static struct notifier_block ipvlan_notifier_block __read_mostly
= {
981 .notifier_call
= ipvlan_device_event
,
984 #if IS_ENABLED(CONFIG_IPV6)
985 static struct notifier_block ipvlan_addr6_notifier_block __read_mostly
= {
986 .notifier_call
= ipvlan_addr6_event
,
989 static struct notifier_block ipvlan_addr6_vtor_notifier_block __read_mostly
= {
990 .notifier_call
= ipvlan_addr6_validator_event
,
994 static int __init
ipvlan_init_module(void)
998 ipvlan_init_secret();
999 register_netdevice_notifier(&ipvlan_notifier_block
);
1000 #if IS_ENABLED(CONFIG_IPV6)
1001 register_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
1002 register_inet6addr_validator_notifier(
1003 &ipvlan_addr6_vtor_notifier_block
);
1005 register_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
1006 register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block
);
1008 err
= ipvlan_l3s_init();
1012 err
= ipvlan_link_register(&ipvlan_link_ops
);
1014 ipvlan_l3s_cleanup();
1020 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
1021 unregister_inetaddr_validator_notifier(
1022 &ipvlan_addr4_vtor_notifier_block
);
1023 #if IS_ENABLED(CONFIG_IPV6)
1024 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
1025 unregister_inet6addr_validator_notifier(
1026 &ipvlan_addr6_vtor_notifier_block
);
1028 unregister_netdevice_notifier(&ipvlan_notifier_block
);
1032 static void __exit
ipvlan_cleanup_module(void)
1034 rtnl_link_unregister(&ipvlan_link_ops
);
1035 ipvlan_l3s_cleanup();
1036 unregister_netdevice_notifier(&ipvlan_notifier_block
);
1037 unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block
);
1038 unregister_inetaddr_validator_notifier(
1039 &ipvlan_addr4_vtor_notifier_block
);
1040 #if IS_ENABLED(CONFIG_IPV6)
1041 unregister_inet6addr_notifier(&ipvlan_addr6_notifier_block
);
1042 unregister_inet6addr_validator_notifier(
1043 &ipvlan_addr6_vtor_notifier_block
);
1047 module_init(ipvlan_init_module
);
1048 module_exit(ipvlan_cleanup_module
);
1050 MODULE_LICENSE("GPL");
1051 MODULE_AUTHOR("Mahesh Bandewar <maheshb@google.com>");
1052 MODULE_DESCRIPTION("Driver for L3 (IPv6/IPv4) based VLANs");
1053 MODULE_ALIAS_RTNL_LINK("ipvlan");