1 /* Copyright (C) 2007-2017 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public
7 * License as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 #include "soft-interface.h"
21 #include <linux/atomic.h>
22 #include <linux/byteorder/generic.h>
23 #include <linux/cache.h>
24 #include <linux/compiler.h>
25 #include <linux/cpumask.h>
26 #include <linux/errno.h>
27 #include <linux/etherdevice.h>
28 #include <linux/ethtool.h>
30 #include <linux/if_ether.h>
31 #include <linux/if_vlan.h>
32 #include <linux/jiffies.h>
33 #include <linux/kernel.h>
34 #include <linux/kref.h>
35 #include <linux/list.h>
36 #include <linux/lockdep.h>
37 #include <linux/netdevice.h>
38 #include <linux/percpu.h>
39 #include <linux/printk.h>
40 #include <linux/random.h>
41 #include <linux/rculist.h>
42 #include <linux/rcupdate.h>
43 #include <linux/rtnetlink.h>
44 #include <linux/skbuff.h>
45 #include <linux/slab.h>
46 #include <linux/socket.h>
47 #include <linux/spinlock.h>
48 #include <linux/stddef.h>
49 #include <linux/string.h>
50 #include <linux/types.h>
53 #include "bridge_loop_avoidance.h"
55 #include "distributed-arp-table.h"
56 #include "gateway_client.h"
57 #include "gateway_common.h"
58 #include "hard-interface.h"
59 #include "multicast.h"
60 #include "network-coding.h"
61 #include "originator.h"
65 #include "translation-table.h"
67 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
71 /* TODO: We must check if we can release all references to non-payload
72 * data using skb_header_release in our skbs to allow skb_cow_header to
73 * work optimally. This means that those skbs are not allowed to read
74 * or write any data which is before the current position of skb->data
75 * after that call and thus allow other skbs with the same data buffer
76 * to write freely in that area.
78 result
= skb_cow_head(skb
, len
);
86 static int batadv_interface_open(struct net_device
*dev
)
88 netif_start_queue(dev
);
92 static int batadv_interface_release(struct net_device
*dev
)
94 netif_stop_queue(dev
);
99 * batadv_sum_counter - Sum the cpu-local counters for index 'idx'
100 * @bat_priv: the bat priv with all the soft interface information
101 * @idx: index of counter to sum up
103 * Return: sum of all cpu-local counters
105 static u64
batadv_sum_counter(struct batadv_priv
*bat_priv
, size_t idx
)
107 u64
*counters
, sum
= 0;
110 for_each_possible_cpu(cpu
) {
111 counters
= per_cpu_ptr(bat_priv
->bat_counters
, cpu
);
112 sum
+= counters
[idx
];
118 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
120 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
121 struct net_device_stats
*stats
= &dev
->stats
;
123 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
124 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
125 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
126 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
127 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
131 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
133 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
134 struct batadv_softif_vlan
*vlan
;
135 struct sockaddr
*addr
= p
;
136 u8 old_addr
[ETH_ALEN
];
138 if (!is_valid_ether_addr(addr
->sa_data
))
139 return -EADDRNOTAVAIL
;
141 ether_addr_copy(old_addr
, dev
->dev_addr
);
142 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
144 /* only modify transtable if it has been initialized before */
145 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
149 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
150 batadv_tt_local_remove(bat_priv
, old_addr
, vlan
->vid
,
151 "mac address changed", false);
152 batadv_tt_local_add(dev
, addr
->sa_data
, vlan
->vid
,
153 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
160 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
163 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
172 * batadv_interface_set_rx_mode - set the rx mode of a device
173 * @dev: registered network device to modify
175 * We do not actually need to set any rx filters for the virtual batman
176 * soft interface. However a dummy handler enables a user to set static
177 * multicast listeners for instance.
179 static void batadv_interface_set_rx_mode(struct net_device
*dev
)
183 static int batadv_interface_tx(struct sk_buff
*skb
,
184 struct net_device
*soft_iface
)
186 struct ethhdr
*ethhdr
;
187 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
188 struct batadv_hard_iface
*primary_if
= NULL
;
189 struct batadv_bcast_packet
*bcast_packet
;
190 static const u8 stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
192 static const u8 ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
194 enum batadv_dhcp_recipient dhcp_rcp
= BATADV_DHCP_NO
;
195 u8
*dst_hint
= NULL
, chaddr
[ETH_ALEN
];
196 struct vlan_ethhdr
*vhdr
;
197 unsigned int header_len
= 0;
198 int data_len
= skb
->len
, ret
;
199 unsigned long brd_delay
= 1;
200 bool do_bcast
= false, client_added
;
204 enum batadv_forw_mode forw_mode
;
205 struct batadv_orig_node
*mcast_single_orig
= NULL
;
206 int network_offset
= ETH_HLEN
;
208 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
211 /* reset control block to avoid left overs from previous users */
212 memset(skb
->cb
, 0, sizeof(struct batadv_skb_cb
));
214 netif_trans_update(soft_iface
);
215 vid
= batadv_get_vid(skb
, 0);
216 ethhdr
= eth_hdr(skb
);
218 switch (ntohs(ethhdr
->h_proto
)) {
220 vhdr
= vlan_eth_hdr(skb
);
222 /* drop batman-in-batman packets to prevent loops */
223 if (vhdr
->h_vlan_encapsulated_proto
!= htons(ETH_P_BATMAN
)) {
224 network_offset
+= VLAN_HLEN
;
233 skb_set_network_header(skb
, network_offset
);
235 if (batadv_bla_tx(bat_priv
, skb
, vid
))
238 /* skb->data might have been reallocated by batadv_bla_tx() */
239 ethhdr
= eth_hdr(skb
);
241 /* Register the client MAC in the transtable */
242 if (!is_multicast_ether_addr(ethhdr
->h_source
) &&
243 !batadv_bla_is_loopdetect_mac(ethhdr
->h_source
)) {
244 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
251 /* don't accept stp packets. STP does not help in meshes.
252 * better use the bridge loop avoidance ...
254 * The same goes for ECTP sent at least by some Cisco Switches,
255 * it might confuse the mesh when used with bridge loop avoidance.
257 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
260 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
263 gw_mode
= atomic_read(&bat_priv
->gw
.mode
);
264 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
265 /* if gw mode is off, broadcast every packet */
266 if (gw_mode
== BATADV_GW_MODE_OFF
) {
271 dhcp_rcp
= batadv_gw_dhcp_recipient_get(skb
, &header_len
,
273 /* skb->data may have been modified by
274 * batadv_gw_dhcp_recipient_get()
276 ethhdr
= eth_hdr(skb
);
277 /* if gw_mode is on, broadcast any non-DHCP message.
278 * All the DHCP packets are going to be sent as unicast
280 if (dhcp_rcp
== BATADV_DHCP_NO
) {
285 if (dhcp_rcp
== BATADV_DHCP_TO_CLIENT
)
287 else if ((gw_mode
== BATADV_GW_MODE_SERVER
) &&
288 (dhcp_rcp
== BATADV_DHCP_TO_SERVER
))
289 /* gateways should not forward any DHCP message if
290 * directed to a DHCP server
295 if (do_bcast
&& !is_broadcast_ether_addr(ethhdr
->h_dest
)) {
296 forw_mode
= batadv_mcast_forw_mode(bat_priv
, skb
,
298 if (forw_mode
== BATADV_FORW_NONE
)
301 if (forw_mode
== BATADV_FORW_SINGLE
)
306 batadv_skb_set_priority(skb
, 0);
308 /* ethernet packet should be broadcasted */
310 primary_if
= batadv_primary_if_get_selected(bat_priv
);
314 /* in case of ARP request, we do not immediately broadcasti the
315 * packet, instead we first wait for DAT to try to retrieve the
318 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
319 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
321 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
324 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
325 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
326 bcast_packet
->ttl
= BATADV_TTL
;
328 /* batman packet type: broadcast */
329 bcast_packet
->packet_type
= BATADV_BCAST
;
330 bcast_packet
->reserved
= 0;
332 /* hw address of first interface is the orig mac because only
333 * this mac is known throughout the mesh
335 ether_addr_copy(bcast_packet
->orig
,
336 primary_if
->net_dev
->dev_addr
);
338 /* set broadcast sequence number */
339 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
340 bcast_packet
->seqno
= htonl(seqno
);
342 batadv_add_bcast_packet_to_list(bat_priv
, skb
, brd_delay
, true);
344 /* a copy is stored in the bcast list, therefore removing
351 /* DHCP packets going to a server will use the GW feature */
352 if (dhcp_rcp
== BATADV_DHCP_TO_SERVER
) {
353 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
356 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
357 } else if (mcast_single_orig
) {
358 ret
= batadv_send_skb_unicast(bat_priv
, skb
,
360 mcast_single_orig
, vid
);
362 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
,
366 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
368 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, dst_hint
,
371 if (ret
!= NET_XMIT_SUCCESS
)
375 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
376 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
382 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
384 if (mcast_single_orig
)
385 batadv_orig_node_put(mcast_single_orig
);
387 batadv_hardif_put(primary_if
);
392 * batadv_interface_rx - receive ethernet frame on local batman-adv interface
393 * @soft_iface: local interface which will receive the ethernet frame
394 * @skb: ethernet frame for @soft_iface
395 * @hdr_size: size of already parsed batman-adv header
396 * @orig_node: originator from which the batman-adv packet was sent
398 * Sends a ethernet frame to the receive path of the local @soft_iface.
399 * skb->data has still point to the batman-adv header with the size @hdr_size.
400 * The caller has to have parsed this header already and made sure that at least
401 * @hdr_size bytes are still available for pull in @skb.
403 * The packet may still get dropped. This can happen when the encapsulated
404 * ethernet frame is invalid or contains again an batman-adv packet. Also
405 * unicast packets will be dropped directly when it was sent between two
408 void batadv_interface_rx(struct net_device
*soft_iface
,
409 struct sk_buff
*skb
, int hdr_size
,
410 struct batadv_orig_node
*orig_node
)
412 struct batadv_bcast_packet
*batadv_bcast_packet
;
413 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
414 struct vlan_ethhdr
*vhdr
;
415 struct ethhdr
*ethhdr
;
419 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
420 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
422 skb_pull_rcsum(skb
, hdr_size
);
423 skb_reset_mac_header(skb
);
425 /* clean the netfilter state now that the batman-adv header has been
430 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
433 vid
= batadv_get_vid(skb
, 0);
434 ethhdr
= eth_hdr(skb
);
436 switch (ntohs(ethhdr
->h_proto
)) {
438 if (!pskb_may_pull(skb
, VLAN_ETH_HLEN
))
441 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
443 /* drop batman-in-batman packets to prevent loops */
444 if (vhdr
->h_vlan_encapsulated_proto
!= htons(ETH_P_BATMAN
))
452 /* skb->dev & skb->pkt_type are set here */
453 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
455 /* should not be necessary anymore as we use skb_pull_rcsum()
456 * TODO: please verify this and remove this TODO
457 * -- Dec 21st 2009, Simon Wunderlich
460 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
462 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
463 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
464 skb
->len
+ ETH_HLEN
);
466 /* Let the bridge loop avoidance check the packet. If will
467 * not handle it, we can safely push it up.
469 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
473 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
474 ethhdr
->h_source
, vid
);
476 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
477 /* set the mark on broadcast packets if AP isolation is ON and
478 * the packet is coming from an "isolated" client
480 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
481 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
483 /* save bits in skb->mark not covered by the mask and
484 * apply the mark on the rest
486 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
487 skb
->mark
|= bat_priv
->isolation_mark
;
489 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
490 ethhdr
->h_dest
, vid
)) {
504 * batadv_softif_vlan_release - release vlan from lists and queue for free after
506 * @ref: kref pointer of the vlan object
508 static void batadv_softif_vlan_release(struct kref
*ref
)
510 struct batadv_softif_vlan
*vlan
;
512 vlan
= container_of(ref
, struct batadv_softif_vlan
, refcount
);
514 spin_lock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
515 hlist_del_rcu(&vlan
->list
);
516 spin_unlock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
518 kfree_rcu(vlan
, rcu
);
522 * batadv_softif_vlan_put - decrease the vlan object refcounter and
523 * possibly release it
524 * @vlan: the vlan object to release
526 void batadv_softif_vlan_put(struct batadv_softif_vlan
*vlan
)
531 kref_put(&vlan
->refcount
, batadv_softif_vlan_release
);
535 * batadv_softif_vlan_get - get the vlan object for a specific vid
536 * @bat_priv: the bat priv with all the soft interface information
537 * @vid: the identifier of the vlan object to retrieve
539 * Return: the private data of the vlan matching the vid passed as argument or
540 * NULL otherwise. The refcounter of the returned object is incremented by 1.
542 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
545 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
548 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
549 if (vlan_tmp
->vid
!= vid
)
552 if (!kref_get_unless_zero(&vlan_tmp
->refcount
))
564 * batadv_softif_create_vlan - allocate the needed resources for a new vlan
565 * @bat_priv: the bat priv with all the soft interface information
566 * @vid: the VLAN identifier
568 * Return: 0 on success, a negative error otherwise.
570 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
572 struct batadv_softif_vlan
*vlan
;
575 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
577 batadv_softif_vlan_put(vlan
);
581 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
585 vlan
->bat_priv
= bat_priv
;
587 kref_init(&vlan
->refcount
);
589 atomic_set(&vlan
->ap_isolation
, 0);
591 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
597 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
598 kref_get(&vlan
->refcount
);
599 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
600 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
602 /* add a new TT local entry. This one will be marked with the NOPURGE
605 batadv_tt_local_add(bat_priv
->soft_iface
,
606 bat_priv
->soft_iface
->dev_addr
, vid
,
607 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
609 /* don't return reference to new softif_vlan */
610 batadv_softif_vlan_put(vlan
);
616 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
617 * @bat_priv: the bat priv with all the soft interface information
618 * @vlan: the object to remove
620 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
621 struct batadv_softif_vlan
*vlan
)
623 /* explicitly remove the associated TT local entry because it is marked
624 * with the NOPURGE flag
626 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
627 vlan
->vid
, "vlan interface destroyed", false);
629 batadv_sysfs_del_vlan(bat_priv
, vlan
);
630 batadv_softif_vlan_put(vlan
);
634 * batadv_interface_add_vid - ndo_add_vid API implementation
635 * @dev: the netdev of the mesh interface
636 * @proto: protocol of the the vlan id
637 * @vid: identifier of the new vlan
639 * Set up all the internal structures for handling the new vlan on top of the
642 * Return: 0 on success or a negative error code in case of failure.
644 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
647 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
648 struct batadv_softif_vlan
*vlan
;
651 /* only 802.1Q vlans are supported.
652 * batman-adv does not know how to handle other types
654 if (proto
!= htons(ETH_P_8021Q
))
657 vid
|= BATADV_VLAN_HAS_TAG
;
659 /* if a new vlan is getting created and it already exists, it means that
660 * it was not deleted yet. batadv_softif_vlan_get() increases the
661 * refcount in order to revive the object.
663 * if it does not exist then create it.
665 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
667 return batadv_softif_create_vlan(bat_priv
, vid
);
669 /* recreate the sysfs object if it was already destroyed (and it should
670 * be since we received a kill_vid() for this vlan
673 ret
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
675 batadv_softif_vlan_put(vlan
);
680 /* add a new TT local entry. This one will be marked with the NOPURGE
681 * flag. This must be added again, even if the vlan object already
682 * exists, because the entry was deleted by kill_vid()
684 batadv_tt_local_add(bat_priv
->soft_iface
,
685 bat_priv
->soft_iface
->dev_addr
, vid
,
686 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
692 * batadv_interface_kill_vid - ndo_kill_vid API implementation
693 * @dev: the netdev of the mesh interface
694 * @proto: protocol of the the vlan id
695 * @vid: identifier of the deleted vlan
697 * Destroy all the internal structures used to handle the vlan identified by vid
698 * on top of the mesh interface
700 * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
701 * or -ENOENT if the specified vlan id wasn't registered.
703 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
706 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
707 struct batadv_softif_vlan
*vlan
;
709 /* only 802.1Q vlans are supported. batman-adv does not know how to
712 if (proto
!= htons(ETH_P_8021Q
))
715 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
719 batadv_softif_destroy_vlan(bat_priv
, vlan
);
721 /* finally free the vlan object */
722 batadv_softif_vlan_put(vlan
);
727 /* batman-adv network devices have devices nesting below it and are a special
728 * "super class" of normal network devices; split their locks off into a
729 * separate class since they always nest.
731 static struct lock_class_key batadv_netdev_xmit_lock_key
;
732 static struct lock_class_key batadv_netdev_addr_lock_key
;
735 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
736 * @dev: device which owns the tx queue
737 * @txq: tx queue to modify
738 * @_unused: always NULL
740 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
741 struct netdev_queue
*txq
,
744 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
748 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
749 * @dev: network device to modify
751 static void batadv_set_lockdep_class(struct net_device
*dev
)
753 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
754 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
758 * batadv_softif_init_late - late stage initialization of soft interface
759 * @dev: registered network device to modify
761 * Return: error code on failures
763 static int batadv_softif_init_late(struct net_device
*dev
)
765 struct batadv_priv
*bat_priv
;
768 size_t cnt_len
= sizeof(u64
) * BATADV_CNT_NUM
;
770 batadv_set_lockdep_class(dev
);
772 bat_priv
= netdev_priv(dev
);
773 bat_priv
->soft_iface
= dev
;
775 /* batadv_interface_stats() needs to be available as soon as
776 * register_netdevice() has been called
778 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(u64
));
779 if (!bat_priv
->bat_counters
)
782 atomic_set(&bat_priv
->aggregated_ogms
, 1);
783 atomic_set(&bat_priv
->bonding
, 0);
784 #ifdef CONFIG_BATMAN_ADV_BLA
785 atomic_set(&bat_priv
->bridge_loop_avoidance
, 1);
787 #ifdef CONFIG_BATMAN_ADV_DAT
788 atomic_set(&bat_priv
->distributed_arp_table
, 1);
790 #ifdef CONFIG_BATMAN_ADV_MCAST
791 bat_priv
->mcast
.querier_ipv4
.exists
= false;
792 bat_priv
->mcast
.querier_ipv4
.shadowing
= false;
793 bat_priv
->mcast
.querier_ipv6
.exists
= false;
794 bat_priv
->mcast
.querier_ipv6
.shadowing
= false;
795 bat_priv
->mcast
.flags
= BATADV_NO_FLAGS
;
796 atomic_set(&bat_priv
->multicast_mode
, 1);
797 atomic_set(&bat_priv
->mcast
.num_disabled
, 0);
798 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
799 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
800 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
802 atomic_set(&bat_priv
->gw
.mode
, BATADV_GW_MODE_OFF
);
803 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
804 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
805 atomic_set(&bat_priv
->orig_interval
, 1000);
806 atomic_set(&bat_priv
->hop_penalty
, 30);
807 #ifdef CONFIG_BATMAN_ADV_DEBUG
808 atomic_set(&bat_priv
->log_level
, 0);
810 atomic_set(&bat_priv
->fragmentation
, 1);
811 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
812 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
813 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
815 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
816 atomic_set(&bat_priv
->bcast_seqno
, 1);
817 atomic_set(&bat_priv
->tt
.vn
, 0);
818 atomic_set(&bat_priv
->tt
.local_changes
, 0);
819 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
820 #ifdef CONFIG_BATMAN_ADV_BLA
821 atomic_set(&bat_priv
->bla
.num_requests
, 0);
823 atomic_set(&bat_priv
->tp_num
, 0);
825 bat_priv
->tt
.last_changeset
= NULL
;
826 bat_priv
->tt
.last_changeset_len
= 0;
827 bat_priv
->isolation_mark
= 0;
828 bat_priv
->isolation_mark_mask
= 0;
830 /* randomize initial seqno to avoid collision */
831 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
832 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
834 bat_priv
->primary_if
= NULL
;
835 bat_priv
->num_ifaces
= 0;
837 batadv_nc_init_bat_priv(bat_priv
);
839 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
841 goto free_bat_counters
;
843 ret
= batadv_debugfs_add_meshif(dev
);
845 goto free_bat_counters
;
847 ret
= batadv_mesh_init(dev
);
854 batadv_debugfs_del_meshif(dev
);
856 free_percpu(bat_priv
->bat_counters
);
857 bat_priv
->bat_counters
= NULL
;
863 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
864 * @dev: batadv_soft_interface used as master interface
865 * @slave_dev: net_device which should become the slave interface
867 * Return: 0 if successful or error otherwise.
869 static int batadv_softif_slave_add(struct net_device
*dev
,
870 struct net_device
*slave_dev
)
872 struct batadv_hard_iface
*hard_iface
;
873 struct net
*net
= dev_net(dev
);
876 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
877 if (!hard_iface
|| hard_iface
->soft_iface
)
880 ret
= batadv_hardif_enable_interface(hard_iface
, net
, dev
->name
);
884 batadv_hardif_put(hard_iface
);
889 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
890 * @dev: batadv_soft_interface used as master interface
891 * @slave_dev: net_device which should be removed from the master interface
893 * Return: 0 if successful or error otherwise.
895 static int batadv_softif_slave_del(struct net_device
*dev
,
896 struct net_device
*slave_dev
)
898 struct batadv_hard_iface
*hard_iface
;
901 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
903 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
906 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
911 batadv_hardif_put(hard_iface
);
915 static const struct net_device_ops batadv_netdev_ops
= {
916 .ndo_init
= batadv_softif_init_late
,
917 .ndo_open
= batadv_interface_open
,
918 .ndo_stop
= batadv_interface_release
,
919 .ndo_get_stats
= batadv_interface_stats
,
920 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
921 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
922 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
923 .ndo_change_mtu
= batadv_interface_change_mtu
,
924 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
925 .ndo_start_xmit
= batadv_interface_tx
,
926 .ndo_validate_addr
= eth_validate_addr
,
927 .ndo_add_slave
= batadv_softif_slave_add
,
928 .ndo_del_slave
= batadv_softif_slave_del
,
931 static void batadv_get_drvinfo(struct net_device
*dev
,
932 struct ethtool_drvinfo
*info
)
934 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
935 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
936 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
937 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
940 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
941 * Declare each description string in struct.name[] to get fixed sized buffer
942 * and compile time checking for strings longer than ETH_GSTRING_LEN.
944 static const struct {
945 const char name
[ETH_GSTRING_LEN
];
946 } batadv_counters_strings
[] = {
963 { "frag_fwd_bytes" },
966 { "tt_response_tx" },
967 { "tt_response_rx" },
968 { "tt_roam_adv_tx" },
969 { "tt_roam_adv_rx" },
970 #ifdef CONFIG_BATMAN_ADV_DAT
975 { "dat_cached_reply_tx" },
977 #ifdef CONFIG_BATMAN_ADV_NC
981 { "nc_recode_bytes" },
984 { "nc_decode_bytes" },
985 { "nc_decode_failed" },
990 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
)
992 if (stringset
== ETH_SS_STATS
)
993 memcpy(data
, batadv_counters_strings
,
994 sizeof(batadv_counters_strings
));
997 static void batadv_get_ethtool_stats(struct net_device
*dev
,
998 struct ethtool_stats
*stats
, u64
*data
)
1000 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1003 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1004 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1007 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1009 if (stringset
== ETH_SS_STATS
)
1010 return BATADV_CNT_NUM
;
1015 static const struct ethtool_ops batadv_ethtool_ops
= {
1016 .get_drvinfo
= batadv_get_drvinfo
,
1017 .get_link
= ethtool_op_get_link
,
1018 .get_strings
= batadv_get_strings
,
1019 .get_ethtool_stats
= batadv_get_ethtool_stats
,
1020 .get_sset_count
= batadv_get_sset_count
,
1024 * batadv_softif_free - Deconstructor of batadv_soft_interface
1025 * @dev: Device to cleanup and remove
1027 static void batadv_softif_free(struct net_device
*dev
)
1029 batadv_debugfs_del_meshif(dev
);
1030 batadv_mesh_free(dev
);
1032 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
1033 * their tasks. Wait for them all to be finished before freeing the
1034 * netdev and its private data (bat_priv)
1040 * batadv_softif_init_early - early stage initialization of soft interface
1041 * @dev: registered network device to modify
1043 static void batadv_softif_init_early(struct net_device
*dev
)
1047 dev
->netdev_ops
= &batadv_netdev_ops
;
1048 dev
->needs_free_netdev
= true;
1049 dev
->priv_destructor
= batadv_softif_free
;
1050 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
| NETIF_F_NETNS_LOCAL
;
1051 dev
->priv_flags
|= IFF_NO_QUEUE
;
1053 /* can't call min_mtu, because the needed variables
1054 * have not been initialized yet
1056 dev
->mtu
= ETH_DATA_LEN
;
1058 /* generate random address */
1059 eth_hw_addr_random(dev
);
1061 dev
->ethtool_ops
= &batadv_ethtool_ops
;
1064 struct net_device
*batadv_softif_create(struct net
*net
, const char *name
)
1066 struct net_device
*soft_iface
;
1069 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
1070 NET_NAME_UNKNOWN
, batadv_softif_init_early
);
1074 dev_net_set(soft_iface
, net
);
1076 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
1078 ret
= register_netdevice(soft_iface
);
1080 pr_err("Unable to register the batman interface '%s': %i\n",
1082 free_netdev(soft_iface
);
1090 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
1091 * @soft_iface: the to-be-removed batman-adv interface
1093 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
1095 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
1096 struct batadv_softif_vlan
*vlan
;
1100 /* destroy the "untagged" VLAN */
1101 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
1103 batadv_softif_destroy_vlan(bat_priv
, vlan
);
1104 batadv_softif_vlan_put(vlan
);
1107 batadv_sysfs_del_meshif(soft_iface
);
1108 unregister_netdevice(soft_iface
);
1112 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
1113 * @soft_iface: the to-be-removed batman-adv interface
1114 * @head: list pointer
1116 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
1117 struct list_head
*head
)
1119 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
1120 struct batadv_hard_iface
*hard_iface
;
1121 struct batadv_softif_vlan
*vlan
;
1123 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
1124 if (hard_iface
->soft_iface
== soft_iface
)
1125 batadv_hardif_disable_interface(hard_iface
,
1126 BATADV_IF_CLEANUP_KEEP
);
1129 /* destroy the "untagged" VLAN */
1130 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
1132 batadv_softif_destroy_vlan(bat_priv
, vlan
);
1133 batadv_softif_vlan_put(vlan
);
1136 batadv_sysfs_del_meshif(soft_iface
);
1137 unregister_netdevice_queue(soft_iface
, head
);
1140 bool batadv_softif_is_valid(const struct net_device
*net_dev
)
1142 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
1148 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
1150 .priv_size
= sizeof(struct batadv_priv
),
1151 .setup
= batadv_softif_init_early
,
1152 .dellink
= batadv_softif_destroy_netlink
,