1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) B.A.T.M.A.N. contributors:
4 * Marek Lindner, Simon Wunderlich
7 #include "soft-interface.h"
10 #include <linux/atomic.h>
11 #include <linux/byteorder/generic.h>
12 #include <linux/cache.h>
13 #include <linux/compiler.h>
14 #include <linux/container_of.h>
15 #include <linux/cpumask.h>
16 #include <linux/errno.h>
17 #include <linux/etherdevice.h>
18 #include <linux/ethtool.h>
19 #include <linux/gfp.h>
20 #include <linux/if_ether.h>
21 #include <linux/if_vlan.h>
22 #include <linux/jiffies.h>
23 #include <linux/kref.h>
24 #include <linux/list.h>
25 #include <linux/lockdep.h>
26 #include <linux/netdevice.h>
27 #include <linux/netlink.h>
28 #include <linux/percpu.h>
29 #include <linux/random.h>
30 #include <linux/rculist.h>
31 #include <linux/rcupdate.h>
32 #include <linux/skbuff.h>
33 #include <linux/slab.h>
34 #include <linux/socket.h>
35 #include <linux/spinlock.h>
36 #include <linux/stddef.h>
37 #include <linux/string.h>
38 #include <linux/types.h>
39 #include <net/net_namespace.h>
40 #include <net/netlink.h>
41 #include <uapi/linux/batadv_packet.h>
42 #include <uapi/linux/batman_adv.h>
45 #include "bridge_loop_avoidance.h"
46 #include "distributed-arp-table.h"
47 #include "gateway_client.h"
48 #include "hard-interface.h"
49 #include "multicast.h"
50 #include "network-coding.h"
52 #include "translation-table.h"
55 * batadv_skb_head_push() - Increase header size and move (push) head pointer
56 * @skb: packet buffer which should be modified
57 * @len: number of bytes to add
59 * Return: 0 on success or negative error number in case of failure
61 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
65 /* TODO: We must check if we can release all references to non-payload
66 * data using __skb_header_release in our skbs to allow skb_cow_header
67 * to work optimally. This means that those skbs are not allowed to read
68 * or write any data which is before the current position of skb->data
69 * after that call and thus allow other skbs with the same data buffer
70 * to write freely in that area.
72 result
= skb_cow_head(skb
, len
);
80 static int batadv_interface_open(struct net_device
*dev
)
82 netif_start_queue(dev
);
86 static int batadv_interface_release(struct net_device
*dev
)
88 netif_stop_queue(dev
);
93 * batadv_sum_counter() - Sum the cpu-local counters for index 'idx'
94 * @bat_priv: the bat priv with all the soft interface information
95 * @idx: index of counter to sum up
97 * Return: sum of all cpu-local counters
99 static u64
batadv_sum_counter(struct batadv_priv
*bat_priv
, size_t idx
)
101 u64
*counters
, sum
= 0;
104 for_each_possible_cpu(cpu
) {
105 counters
= per_cpu_ptr(bat_priv
->bat_counters
, cpu
);
106 sum
+= counters
[idx
];
112 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
114 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
115 struct net_device_stats
*stats
= &dev
->stats
;
117 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
118 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
119 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
120 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
121 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
125 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
127 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
128 struct batadv_softif_vlan
*vlan
;
129 struct sockaddr
*addr
= p
;
130 u8 old_addr
[ETH_ALEN
];
132 if (!is_valid_ether_addr(addr
->sa_data
))
133 return -EADDRNOTAVAIL
;
135 ether_addr_copy(old_addr
, dev
->dev_addr
);
136 eth_hw_addr_set(dev
, addr
->sa_data
);
138 /* only modify transtable if it has been initialized before */
139 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
143 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
144 batadv_tt_local_remove(bat_priv
, old_addr
, vlan
->vid
,
145 "mac address changed", false);
146 batadv_tt_local_add(dev
, addr
->sa_data
, vlan
->vid
,
147 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
154 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
156 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
159 if (new_mtu
< ETH_MIN_MTU
|| new_mtu
> batadv_hardif_min_mtu(dev
))
162 WRITE_ONCE(dev
->mtu
, new_mtu
);
163 bat_priv
->mtu_set_by_user
= new_mtu
;
169 * batadv_interface_set_rx_mode() - set the rx mode of a device
170 * @dev: registered network device to modify
172 * We do not actually need to set any rx filters for the virtual batman
173 * soft interface. However a dummy handler enables a user to set static
174 * multicast listeners for instance.
176 static void batadv_interface_set_rx_mode(struct net_device
*dev
)
180 static netdev_tx_t
batadv_interface_tx(struct sk_buff
*skb
,
181 struct net_device
*soft_iface
)
183 struct ethhdr
*ethhdr
;
184 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
185 struct batadv_hard_iface
*primary_if
= NULL
;
186 struct batadv_bcast_packet
*bcast_packet
;
187 static const u8 stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
189 static const u8 ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
191 enum batadv_dhcp_recipient dhcp_rcp
= BATADV_DHCP_NO
;
192 u8
*dst_hint
= NULL
, chaddr
[ETH_ALEN
];
193 struct vlan_ethhdr
*vhdr
;
194 unsigned int header_len
= 0;
195 int data_len
= skb
->len
, ret
;
196 unsigned long brd_delay
= 0;
197 bool do_bcast
= false, client_added
;
201 enum batadv_forw_mode forw_mode
= BATADV_FORW_BCAST
;
202 int mcast_is_routable
= 0;
203 int network_offset
= ETH_HLEN
;
206 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
209 /* reset control block to avoid left overs from previous users */
210 memset(skb
->cb
, 0, sizeof(struct batadv_skb_cb
));
212 netif_trans_update(soft_iface
);
213 vid
= batadv_get_vid(skb
, 0);
215 skb_reset_mac_header(skb
);
216 ethhdr
= eth_hdr(skb
);
218 proto
= ethhdr
->h_proto
;
220 switch (ntohs(proto
)) {
222 if (!pskb_may_pull(skb
, sizeof(*vhdr
)))
224 vhdr
= vlan_eth_hdr(skb
);
225 proto
= vhdr
->h_vlan_encapsulated_proto
;
227 /* drop batman-in-batman packets to prevent loops */
228 if (proto
!= htons(ETH_P_BATMAN
)) {
229 network_offset
+= VLAN_HLEN
;
238 skb_set_network_header(skb
, network_offset
);
240 if (batadv_bla_tx(bat_priv
, skb
, vid
))
243 /* skb->data might have been reallocated by batadv_bla_tx() */
244 ethhdr
= eth_hdr(skb
);
246 /* Register the client MAC in the transtable */
247 if (!is_multicast_ether_addr(ethhdr
->h_source
) &&
248 !batadv_bla_is_loopdetect_mac(ethhdr
->h_source
)) {
249 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
256 /* Snoop address candidates from DHCPACKs for early DAT filling */
257 batadv_dat_snoop_outgoing_dhcp_ack(bat_priv
, skb
, proto
, vid
);
259 /* don't accept stp packets. STP does not help in meshes.
260 * better use the bridge loop avoidance ...
262 * The same goes for ECTP sent at least by some Cisco Switches,
263 * it might confuse the mesh when used with bridge loop avoidance.
265 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
268 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
271 gw_mode
= atomic_read(&bat_priv
->gw
.mode
);
272 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
273 /* if gw mode is off, broadcast every packet */
274 if (gw_mode
== BATADV_GW_MODE_OFF
) {
279 dhcp_rcp
= batadv_gw_dhcp_recipient_get(skb
, &header_len
,
281 /* skb->data may have been modified by
282 * batadv_gw_dhcp_recipient_get()
284 ethhdr
= eth_hdr(skb
);
285 /* if gw_mode is on, broadcast any non-DHCP message.
286 * All the DHCP packets are going to be sent as unicast
288 if (dhcp_rcp
== BATADV_DHCP_NO
) {
293 if (dhcp_rcp
== BATADV_DHCP_TO_CLIENT
)
295 else if ((gw_mode
== BATADV_GW_MODE_SERVER
) &&
296 (dhcp_rcp
== BATADV_DHCP_TO_SERVER
))
297 /* gateways should not forward any DHCP message if
298 * directed to a DHCP server
303 if (do_bcast
&& !is_broadcast_ether_addr(ethhdr
->h_dest
)) {
304 forw_mode
= batadv_mcast_forw_mode(bat_priv
, skb
, vid
,
307 case BATADV_FORW_BCAST
:
309 case BATADV_FORW_UCASTS
:
310 case BATADV_FORW_MCAST
:
313 case BATADV_FORW_NONE
:
321 batadv_skb_set_priority(skb
, 0);
323 /* ethernet packet should be broadcasted */
325 primary_if
= batadv_primary_if_get_selected(bat_priv
);
329 /* in case of ARP request, we do not immediately broadcasti the
330 * packet, instead we first wait for DAT to try to retrieve the
333 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
334 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
336 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
339 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
340 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
341 bcast_packet
->ttl
= BATADV_TTL
- 1;
343 /* batman packet type: broadcast */
344 bcast_packet
->packet_type
= BATADV_BCAST
;
345 bcast_packet
->reserved
= 0;
347 /* hw address of first interface is the orig mac because only
348 * this mac is known throughout the mesh
350 ether_addr_copy(bcast_packet
->orig
,
351 primary_if
->net_dev
->dev_addr
);
353 /* set broadcast sequence number */
354 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
355 bcast_packet
->seqno
= htonl(seqno
);
357 batadv_send_bcast_packet(bat_priv
, skb
, brd_delay
, true);
360 /* DHCP packets going to a server will use the GW feature */
361 if (dhcp_rcp
== BATADV_DHCP_TO_SERVER
) {
362 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
365 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
366 } else if (forw_mode
== BATADV_FORW_UCASTS
) {
367 ret
= batadv_mcast_forw_send(bat_priv
, skb
, vid
,
369 } else if (forw_mode
== BATADV_FORW_MCAST
) {
370 ret
= batadv_mcast_forw_mcsend(bat_priv
, skb
);
372 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
,
376 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
378 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, dst_hint
,
381 if (ret
!= NET_XMIT_SUCCESS
)
385 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
386 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
392 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
394 batadv_hardif_put(primary_if
);
399 * batadv_interface_rx() - receive ethernet frame on local batman-adv interface
400 * @soft_iface: local interface which will receive the ethernet frame
401 * @skb: ethernet frame for @soft_iface
402 * @hdr_size: size of already parsed batman-adv header
403 * @orig_node: originator from which the batman-adv packet was sent
405 * Sends an ethernet frame to the receive path of the local @soft_iface.
406 * skb->data has still point to the batman-adv header with the size @hdr_size.
407 * The caller has to have parsed this header already and made sure that at least
408 * @hdr_size bytes are still available for pull in @skb.
410 * The packet may still get dropped. This can happen when the encapsulated
411 * ethernet frame is invalid or contains again an batman-adv packet. Also
412 * unicast packets will be dropped directly when it was sent between two
415 void batadv_interface_rx(struct net_device
*soft_iface
,
416 struct sk_buff
*skb
, int hdr_size
,
417 struct batadv_orig_node
*orig_node
)
419 struct batadv_bcast_packet
*batadv_bcast_packet
;
420 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
421 struct vlan_ethhdr
*vhdr
;
422 struct ethhdr
*ethhdr
;
426 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
427 packet_type
= batadv_bcast_packet
->packet_type
;
429 skb_pull_rcsum(skb
, hdr_size
);
430 skb_reset_mac_header(skb
);
432 /* clean the netfilter state now that the batman-adv header has been
437 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
440 vid
= batadv_get_vid(skb
, 0);
441 ethhdr
= eth_hdr(skb
);
443 switch (ntohs(ethhdr
->h_proto
)) {
445 if (!pskb_may_pull(skb
, VLAN_ETH_HLEN
))
448 vhdr
= skb_vlan_eth_hdr(skb
);
450 /* drop batman-in-batman packets to prevent loops */
451 if (vhdr
->h_vlan_encapsulated_proto
!= htons(ETH_P_BATMAN
))
459 /* skb->dev & skb->pkt_type are set here */
460 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
461 skb_postpull_rcsum(skb
, eth_hdr(skb
), ETH_HLEN
);
463 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
464 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
465 skb
->len
+ ETH_HLEN
);
467 /* Let the bridge loop avoidance check the packet. If will
468 * not handle it, we can safely push it up.
470 if (batadv_bla_rx(bat_priv
, skb
, vid
, packet_type
))
474 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
475 ethhdr
->h_source
, vid
);
477 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
478 /* set the mark on broadcast packets if AP isolation is ON and
479 * the packet is coming from an "isolated" client
481 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
482 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
484 /* save bits in skb->mark not covered by the mask and
485 * apply the mark on the rest
487 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
488 skb
->mark
|= bat_priv
->isolation_mark
;
490 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
491 ethhdr
->h_dest
, vid
)) {
505 * batadv_softif_vlan_release() - release vlan from lists and queue for free
506 * after rcu grace period
507 * @ref: kref pointer of the vlan object
509 void batadv_softif_vlan_release(struct kref
*ref
)
511 struct batadv_softif_vlan
*vlan
;
513 vlan
= container_of(ref
, struct batadv_softif_vlan
, refcount
);
515 spin_lock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
516 hlist_del_rcu(&vlan
->list
);
517 spin_unlock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
519 kfree_rcu(vlan
, rcu
);
523 * batadv_softif_vlan_get() - get the vlan object for a specific vid
524 * @bat_priv: the bat priv with all the soft interface information
525 * @vid: the identifier of the vlan object to retrieve
527 * Return: the private data of the vlan matching the vid passed as argument or
528 * NULL otherwise. The refcounter of the returned object is incremented by 1.
530 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
533 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
536 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
537 if (vlan_tmp
->vid
!= vid
)
540 if (!kref_get_unless_zero(&vlan_tmp
->refcount
))
552 * batadv_softif_create_vlan() - allocate the needed resources for a new vlan
553 * @bat_priv: the bat priv with all the soft interface information
554 * @vid: the VLAN identifier
556 * Return: 0 on success, a negative error otherwise.
558 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
560 struct batadv_softif_vlan
*vlan
;
562 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
564 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
566 batadv_softif_vlan_put(vlan
);
567 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
571 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
573 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
577 vlan
->bat_priv
= bat_priv
;
579 kref_init(&vlan
->refcount
);
581 atomic_set(&vlan
->ap_isolation
, 0);
583 kref_get(&vlan
->refcount
);
584 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
585 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
587 /* add a new TT local entry. This one will be marked with the NOPURGE
590 batadv_tt_local_add(bat_priv
->soft_iface
,
591 bat_priv
->soft_iface
->dev_addr
, vid
,
592 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
594 /* don't return reference to new softif_vlan */
595 batadv_softif_vlan_put(vlan
);
601 * batadv_softif_destroy_vlan() - remove and destroy a softif_vlan object
602 * @bat_priv: the bat priv with all the soft interface information
603 * @vlan: the object to remove
605 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
606 struct batadv_softif_vlan
*vlan
)
608 /* explicitly remove the associated TT local entry because it is marked
609 * with the NOPURGE flag
611 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
612 vlan
->vid
, "vlan interface destroyed", false);
614 batadv_softif_vlan_put(vlan
);
618 * batadv_interface_add_vid() - ndo_add_vid API implementation
619 * @dev: the netdev of the mesh interface
620 * @proto: protocol of the vlan id
621 * @vid: identifier of the new vlan
623 * Set up all the internal structures for handling the new vlan on top of the
626 * Return: 0 on success or a negative error code in case of failure.
628 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
631 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
632 struct batadv_softif_vlan
*vlan
;
634 /* only 802.1Q vlans are supported.
635 * batman-adv does not know how to handle other types
637 if (proto
!= htons(ETH_P_8021Q
))
640 vid
|= BATADV_VLAN_HAS_TAG
;
642 /* if a new vlan is getting created and it already exists, it means that
643 * it was not deleted yet. batadv_softif_vlan_get() increases the
644 * refcount in order to revive the object.
646 * if it does not exist then create it.
648 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
650 return batadv_softif_create_vlan(bat_priv
, vid
);
652 /* add a new TT local entry. This one will be marked with the NOPURGE
653 * flag. This must be added again, even if the vlan object already
654 * exists, because the entry was deleted by kill_vid()
656 batadv_tt_local_add(bat_priv
->soft_iface
,
657 bat_priv
->soft_iface
->dev_addr
, vid
,
658 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
664 * batadv_interface_kill_vid() - ndo_kill_vid API implementation
665 * @dev: the netdev of the mesh interface
666 * @proto: protocol of the vlan id
667 * @vid: identifier of the deleted vlan
669 * Destroy all the internal structures used to handle the vlan identified by vid
670 * on top of the mesh interface
672 * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
673 * or -ENOENT if the specified vlan id wasn't registered.
675 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
678 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
679 struct batadv_softif_vlan
*vlan
;
681 /* only 802.1Q vlans are supported. batman-adv does not know how to
684 if (proto
!= htons(ETH_P_8021Q
))
687 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
691 batadv_softif_destroy_vlan(bat_priv
, vlan
);
693 /* finally free the vlan object */
694 batadv_softif_vlan_put(vlan
);
699 /* batman-adv network devices have devices nesting below it and are a special
700 * "super class" of normal network devices; split their locks off into a
701 * separate class since they always nest.
703 static struct lock_class_key batadv_netdev_xmit_lock_key
;
704 static struct lock_class_key batadv_netdev_addr_lock_key
;
707 * batadv_set_lockdep_class_one() - Set lockdep class for a single tx queue
708 * @dev: device which owns the tx queue
709 * @txq: tx queue to modify
710 * @_unused: always NULL
712 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
713 struct netdev_queue
*txq
,
716 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
720 * batadv_set_lockdep_class() - Set txq and addr_list lockdep class
721 * @dev: network device to modify
723 static void batadv_set_lockdep_class(struct net_device
*dev
)
725 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
726 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
730 * batadv_softif_init_late() - late stage initialization of soft interface
731 * @dev: registered network device to modify
733 * Return: error code on failures
735 static int batadv_softif_init_late(struct net_device
*dev
)
737 struct batadv_priv
*bat_priv
;
740 size_t cnt_len
= sizeof(u64
) * BATADV_CNT_NUM
;
742 batadv_set_lockdep_class(dev
);
744 bat_priv
= netdev_priv(dev
);
745 bat_priv
->soft_iface
= dev
;
747 /* batadv_interface_stats() needs to be available as soon as
748 * register_netdevice() has been called
750 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(u64
));
751 if (!bat_priv
->bat_counters
)
754 atomic_set(&bat_priv
->aggregated_ogms
, 1);
755 atomic_set(&bat_priv
->bonding
, 0);
756 #ifdef CONFIG_BATMAN_ADV_BLA
757 atomic_set(&bat_priv
->bridge_loop_avoidance
, 1);
759 #ifdef CONFIG_BATMAN_ADV_DAT
760 atomic_set(&bat_priv
->distributed_arp_table
, 1);
762 #ifdef CONFIG_BATMAN_ADV_MCAST
763 atomic_set(&bat_priv
->multicast_mode
, 1);
764 atomic_set(&bat_priv
->multicast_fanout
, 16);
765 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
766 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
767 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
768 atomic_set(&bat_priv
->mcast
.num_no_mc_ptype_capa
, 0);
770 atomic_set(&bat_priv
->gw
.mode
, BATADV_GW_MODE_OFF
);
771 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
772 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
773 atomic_set(&bat_priv
->orig_interval
, 1000);
774 atomic_set(&bat_priv
->hop_penalty
, 30);
775 #ifdef CONFIG_BATMAN_ADV_DEBUG
776 atomic_set(&bat_priv
->log_level
, 0);
778 atomic_set(&bat_priv
->fragmentation
, 1);
779 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
780 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
781 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
783 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
784 atomic_set(&bat_priv
->bcast_seqno
, 1);
785 atomic_set(&bat_priv
->tt
.vn
, 0);
786 atomic_set(&bat_priv
->tt
.local_changes
, 0);
787 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
788 #ifdef CONFIG_BATMAN_ADV_BLA
789 atomic_set(&bat_priv
->bla
.num_requests
, 0);
791 atomic_set(&bat_priv
->tp_num
, 0);
793 bat_priv
->tt
.last_changeset
= NULL
;
794 bat_priv
->tt
.last_changeset_len
= 0;
795 bat_priv
->isolation_mark
= 0;
796 bat_priv
->isolation_mark_mask
= 0;
798 /* randomize initial seqno to avoid collision */
799 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
800 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
802 bat_priv
->primary_if
= NULL
;
804 batadv_nc_init_bat_priv(bat_priv
);
806 if (!bat_priv
->algo_ops
) {
807 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
809 goto free_bat_counters
;
812 ret
= batadv_mesh_init(dev
);
814 goto free_bat_counters
;
819 free_percpu(bat_priv
->bat_counters
);
820 bat_priv
->bat_counters
= NULL
;
826 * batadv_softif_slave_add() - Add a slave interface to a batadv_soft_interface
827 * @dev: batadv_soft_interface used as master interface
828 * @slave_dev: net_device which should become the slave interface
829 * @extack: extended ACK report struct
831 * Return: 0 if successful or error otherwise.
833 static int batadv_softif_slave_add(struct net_device
*dev
,
834 struct net_device
*slave_dev
,
835 struct netlink_ext_ack
*extack
)
837 struct batadv_hard_iface
*hard_iface
;
840 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
841 if (!hard_iface
|| hard_iface
->soft_iface
)
844 ret
= batadv_hardif_enable_interface(hard_iface
, dev
);
847 batadv_hardif_put(hard_iface
);
852 * batadv_softif_slave_del() - Delete a slave iface from a batadv_soft_interface
853 * @dev: batadv_soft_interface used as master interface
854 * @slave_dev: net_device which should be removed from the master interface
856 * Return: 0 if successful or error otherwise.
858 static int batadv_softif_slave_del(struct net_device
*dev
,
859 struct net_device
*slave_dev
)
861 struct batadv_hard_iface
*hard_iface
;
864 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
866 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
869 batadv_hardif_disable_interface(hard_iface
);
873 batadv_hardif_put(hard_iface
);
877 static const struct net_device_ops batadv_netdev_ops
= {
878 .ndo_init
= batadv_softif_init_late
,
879 .ndo_open
= batadv_interface_open
,
880 .ndo_stop
= batadv_interface_release
,
881 .ndo_get_stats
= batadv_interface_stats
,
882 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
883 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
884 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
885 .ndo_change_mtu
= batadv_interface_change_mtu
,
886 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
887 .ndo_start_xmit
= batadv_interface_tx
,
888 .ndo_validate_addr
= eth_validate_addr
,
889 .ndo_add_slave
= batadv_softif_slave_add
,
890 .ndo_del_slave
= batadv_softif_slave_del
,
893 static void batadv_get_drvinfo(struct net_device
*dev
,
894 struct ethtool_drvinfo
*info
)
896 strscpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
897 strscpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
898 strscpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
899 strscpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
902 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
903 * Declare each description string in struct.name[] to get fixed sized buffer
904 * and compile time checking for strings longer than ETH_GSTRING_LEN.
906 static const struct {
907 const char name
[ETH_GSTRING_LEN
];
908 } batadv_counters_strings
[] = {
925 { "frag_fwd_bytes" },
928 { "tt_response_tx" },
929 { "tt_response_rx" },
930 { "tt_roam_adv_tx" },
931 { "tt_roam_adv_rx" },
932 #ifdef CONFIG_BATMAN_ADV_MCAST
934 { "mcast_tx_bytes" },
935 { "mcast_tx_local" },
936 { "mcast_tx_local_bytes" },
938 { "mcast_rx_bytes" },
939 { "mcast_rx_local" },
940 { "mcast_rx_local_bytes" },
942 { "mcast_fwd_bytes" },
944 #ifdef CONFIG_BATMAN_ADV_DAT
949 { "dat_cached_reply_tx" },
951 #ifdef CONFIG_BATMAN_ADV_NC
955 { "nc_recode_bytes" },
958 { "nc_decode_bytes" },
959 { "nc_decode_failed" },
964 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
)
966 if (stringset
== ETH_SS_STATS
)
967 memcpy(data
, batadv_counters_strings
,
968 sizeof(batadv_counters_strings
));
971 static void batadv_get_ethtool_stats(struct net_device
*dev
,
972 struct ethtool_stats
*stats
, u64
*data
)
974 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
977 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
978 data
[i
] = batadv_sum_counter(bat_priv
, i
);
981 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
983 if (stringset
== ETH_SS_STATS
)
984 return BATADV_CNT_NUM
;
989 static const struct ethtool_ops batadv_ethtool_ops
= {
990 .get_drvinfo
= batadv_get_drvinfo
,
991 .get_link
= ethtool_op_get_link
,
992 .get_strings
= batadv_get_strings
,
993 .get_ethtool_stats
= batadv_get_ethtool_stats
,
994 .get_sset_count
= batadv_get_sset_count
,
998 * batadv_softif_free() - Deconstructor of batadv_soft_interface
999 * @dev: Device to cleanup and remove
1001 static void batadv_softif_free(struct net_device
*dev
)
1003 batadv_mesh_free(dev
);
1005 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
1006 * their tasks. Wait for them all to be finished before freeing the
1007 * netdev and its private data (bat_priv)
1013 * batadv_softif_init_early() - early stage initialization of soft interface
1014 * @dev: registered network device to modify
1016 static void batadv_softif_init_early(struct net_device
*dev
)
1020 dev
->netdev_ops
= &batadv_netdev_ops
;
1021 dev
->needs_free_netdev
= true;
1022 dev
->priv_destructor
= batadv_softif_free
;
1023 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
1024 dev
->priv_flags
|= IFF_NO_QUEUE
;
1026 dev
->netns_local
= true;
1028 /* can't call min_mtu, because the needed variables
1029 * have not been initialized yet
1031 dev
->mtu
= ETH_DATA_LEN
;
1033 /* generate random address */
1034 eth_hw_addr_random(dev
);
1036 dev
->ethtool_ops
= &batadv_ethtool_ops
;
1040 * batadv_softif_validate() - validate configuration of new batadv link
1041 * @tb: IFLA_INFO_DATA netlink attributes
1042 * @data: enum batadv_ifla_attrs attributes
1043 * @extack: extended ACK report struct
1045 * Return: 0 if successful or error otherwise.
1047 static int batadv_softif_validate(struct nlattr
*tb
[], struct nlattr
*data
[],
1048 struct netlink_ext_ack
*extack
)
1050 struct batadv_algo_ops
*algo_ops
;
1055 if (data
[IFLA_BATADV_ALGO_NAME
]) {
1056 algo_ops
= batadv_algo_get(nla_data(data
[IFLA_BATADV_ALGO_NAME
]));
1065 * batadv_softif_newlink() - pre-initialize and register new batadv link
1066 * @src_net: the applicable net namespace
1067 * @dev: network device to register
1068 * @tb: IFLA_INFO_DATA netlink attributes
1069 * @data: enum batadv_ifla_attrs attributes
1070 * @extack: extended ACK report struct
1072 * Return: 0 if successful or error otherwise.
1074 static int batadv_softif_newlink(struct net
*src_net
, struct net_device
*dev
,
1075 struct nlattr
*tb
[], struct nlattr
*data
[],
1076 struct netlink_ext_ack
*extack
)
1078 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1079 const char *algo_name
;
1082 if (data
&& data
[IFLA_BATADV_ALGO_NAME
]) {
1083 algo_name
= nla_data(data
[IFLA_BATADV_ALGO_NAME
]);
1084 err
= batadv_algo_select(bat_priv
, algo_name
);
1089 return register_netdevice(dev
);
1093 * batadv_softif_destroy_netlink() - deletion of batadv_soft_interface via
1095 * @soft_iface: the to-be-removed batman-adv interface
1096 * @head: list pointer
1098 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
1099 struct list_head
*head
)
1101 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
1102 struct batadv_hard_iface
*hard_iface
;
1103 struct batadv_softif_vlan
*vlan
;
1105 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
1106 if (hard_iface
->soft_iface
== soft_iface
)
1107 batadv_hardif_disable_interface(hard_iface
);
1110 /* destroy the "untagged" VLAN */
1111 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
1113 batadv_softif_destroy_vlan(bat_priv
, vlan
);
1114 batadv_softif_vlan_put(vlan
);
1117 unregister_netdevice_queue(soft_iface
, head
);
1121 * batadv_softif_is_valid() - Check whether device is a batadv soft interface
1122 * @net_dev: device which should be checked
1124 * Return: true when net_dev is a batman-adv interface, false otherwise
1126 bool batadv_softif_is_valid(const struct net_device
*net_dev
)
1128 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
1134 static const struct nla_policy batadv_ifla_policy
[IFLA_BATADV_MAX
+ 1] = {
1135 [IFLA_BATADV_ALGO_NAME
] = { .type
= NLA_NUL_STRING
},
1138 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
1140 .priv_size
= sizeof(struct batadv_priv
),
1141 .setup
= batadv_softif_init_early
,
1142 .maxtype
= IFLA_BATADV_MAX
,
1143 .policy
= batadv_ifla_policy
,
1144 .validate
= batadv_softif_validate
,
1145 .newlink
= batadv_softif_newlink
,
1146 .dellink
= batadv_softif_destroy_netlink
,