1 /* Copyright (C) 2007-2015 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/errno.h>
26 #include <linux/etherdevice.h>
27 #include <linux/ethtool.h>
29 #include <linux/if_ether.h>
30 #include <linux/if_vlan.h>
31 #include <linux/jiffies.h>
32 #include <linux/kernel.h>
33 #include <linux/list.h>
34 #include <linux/lockdep.h>
35 #include <linux/netdevice.h>
36 #include <linux/percpu.h>
37 #include <linux/printk.h>
38 #include <linux/random.h>
39 #include <linux/rculist.h>
40 #include <linux/rcupdate.h>
41 #include <linux/skbuff.h>
42 #include <linux/slab.h>
43 #include <linux/socket.h>
44 #include <linux/spinlock.h>
45 #include <linux/stddef.h>
46 #include <linux/string.h>
47 #include <linux/types.h>
48 #include <linux/workqueue.h>
50 #include "bridge_loop_avoidance.h"
52 #include "distributed-arp-table.h"
53 #include "gateway_client.h"
54 #include "gateway_common.h"
55 #include "hard-interface.h"
56 #include "multicast.h"
57 #include "network-coding.h"
61 #include "translation-table.h"
63 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
64 static void batadv_get_drvinfo(struct net_device
*dev
,
65 struct ethtool_drvinfo
*info
);
66 static u32
batadv_get_msglevel(struct net_device
*dev
);
67 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
);
68 static u32
batadv_get_link(struct net_device
*dev
);
69 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
);
70 static void batadv_get_ethtool_stats(struct net_device
*dev
,
71 struct ethtool_stats
*stats
, u64
*data
);
72 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
);
74 static const struct ethtool_ops batadv_ethtool_ops
= {
75 .get_settings
= batadv_get_settings
,
76 .get_drvinfo
= batadv_get_drvinfo
,
77 .get_msglevel
= batadv_get_msglevel
,
78 .set_msglevel
= batadv_set_msglevel
,
79 .get_link
= batadv_get_link
,
80 .get_strings
= batadv_get_strings
,
81 .get_ethtool_stats
= batadv_get_ethtool_stats
,
82 .get_sset_count
= batadv_get_sset_count
,
85 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
89 /* TODO: We must check if we can release all references to non-payload
90 * data using skb_header_release in our skbs to allow skb_cow_header to
91 * work optimally. This means that those skbs are not allowed to read
92 * or write any data which is before the current position of skb->data
93 * after that call and thus allow other skbs with the same data buffer
94 * to write freely in that area.
96 result
= skb_cow_head(skb
, len
);
104 static int batadv_interface_open(struct net_device
*dev
)
106 netif_start_queue(dev
);
110 static int batadv_interface_release(struct net_device
*dev
)
112 netif_stop_queue(dev
);
116 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
118 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
119 struct net_device_stats
*stats
= &bat_priv
->stats
;
121 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
122 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
123 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
124 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
125 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
129 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
131 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
132 struct batadv_softif_vlan
*vlan
;
133 struct sockaddr
*addr
= p
;
134 uint8_t old_addr
[ETH_ALEN
];
136 if (!is_valid_ether_addr(addr
->sa_data
))
137 return -EADDRNOTAVAIL
;
139 ether_addr_copy(old_addr
, dev
->dev_addr
);
140 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
142 /* only modify transtable if it has been initialized before */
143 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
147 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
148 batadv_tt_local_remove(bat_priv
, old_addr
, vlan
->vid
,
149 "mac address changed", false);
150 batadv_tt_local_add(dev
, addr
->sa_data
, vlan
->vid
,
151 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
158 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
161 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
170 * batadv_interface_set_rx_mode - set the rx mode of a device
171 * @dev: registered network device to modify
173 * We do not actually need to set any rx filters for the virtual batman
174 * soft interface. However a dummy handler enables a user to set static
175 * multicast listeners for instance.
177 static void batadv_interface_set_rx_mode(struct net_device
*dev
)
181 static int batadv_interface_tx(struct sk_buff
*skb
,
182 struct net_device
*soft_iface
)
184 struct ethhdr
*ethhdr
;
185 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
186 struct batadv_hard_iface
*primary_if
= NULL
;
187 struct batadv_bcast_packet
*bcast_packet
;
188 __be16 ethertype
= htons(ETH_P_BATMAN
);
189 static const uint8_t stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
191 static const uint8_t ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
193 enum batadv_dhcp_recipient dhcp_rcp
= BATADV_DHCP_NO
;
194 uint8_t *dst_hint
= NULL
, chaddr
[ETH_ALEN
];
195 struct vlan_ethhdr
*vhdr
;
196 unsigned int header_len
= 0;
197 int data_len
= skb
->len
, ret
;
198 unsigned long brd_delay
= 1;
199 bool do_bcast
= false, client_added
;
203 enum batadv_forw_mode forw_mode
;
204 struct batadv_orig_node
*mcast_single_orig
= NULL
;
206 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
209 soft_iface
->trans_start
= jiffies
;
210 vid
= batadv_get_vid(skb
, 0);
211 ethhdr
= eth_hdr(skb
);
213 switch (ntohs(ethhdr
->h_proto
)) {
215 vhdr
= vlan_eth_hdr(skb
);
217 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
225 if (batadv_bla_tx(bat_priv
, skb
, vid
))
228 /* skb->data might have been reallocated by batadv_bla_tx() */
229 ethhdr
= eth_hdr(skb
);
231 /* Register the client MAC in the transtable */
232 if (!is_multicast_ether_addr(ethhdr
->h_source
)) {
233 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
240 /* don't accept stp packets. STP does not help in meshes.
241 * better use the bridge loop avoidance ...
243 * The same goes for ECTP sent at least by some Cisco Switches,
244 * it might confuse the mesh when used with bridge loop avoidance.
246 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
249 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
252 gw_mode
= atomic_read(&bat_priv
->gw_mode
);
253 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
254 /* if gw mode is off, broadcast every packet */
255 if (gw_mode
== BATADV_GW_MODE_OFF
) {
260 dhcp_rcp
= batadv_gw_dhcp_recipient_get(skb
, &header_len
,
262 /* skb->data may have been modified by
263 * batadv_gw_dhcp_recipient_get()
265 ethhdr
= eth_hdr(skb
);
266 /* if gw_mode is on, broadcast any non-DHCP message.
267 * All the DHCP packets are going to be sent as unicast
269 if (dhcp_rcp
== BATADV_DHCP_NO
) {
274 if (dhcp_rcp
== BATADV_DHCP_TO_CLIENT
)
276 else if ((gw_mode
== BATADV_GW_MODE_SERVER
) &&
277 (dhcp_rcp
== BATADV_DHCP_TO_SERVER
))
278 /* gateways should not forward any DHCP message if
279 * directed to a DHCP server
284 if (do_bcast
&& !is_broadcast_ether_addr(ethhdr
->h_dest
)) {
285 forw_mode
= batadv_mcast_forw_mode(bat_priv
, skb
,
287 if (forw_mode
== BATADV_FORW_NONE
)
290 if (forw_mode
== BATADV_FORW_SINGLE
)
295 batadv_skb_set_priority(skb
, 0);
297 /* ethernet packet should be broadcasted */
299 primary_if
= batadv_primary_if_get_selected(bat_priv
);
303 /* in case of ARP request, we do not immediately broadcasti the
304 * packet, instead we first wait for DAT to try to retrieve the
307 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
308 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
310 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
313 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
314 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
315 bcast_packet
->ttl
= BATADV_TTL
;
317 /* batman packet type: broadcast */
318 bcast_packet
->packet_type
= BATADV_BCAST
;
319 bcast_packet
->reserved
= 0;
321 /* hw address of first interface is the orig mac because only
322 * this mac is known throughout the mesh
324 ether_addr_copy(bcast_packet
->orig
,
325 primary_if
->net_dev
->dev_addr
);
327 /* set broadcast sequence number */
328 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
329 bcast_packet
->seqno
= htonl(seqno
);
331 batadv_add_bcast_packet_to_list(bat_priv
, skb
, brd_delay
);
333 /* a copy is stored in the bcast list, therefore removing
340 /* DHCP packets going to a server will use the GW feature */
341 if (dhcp_rcp
== BATADV_DHCP_TO_SERVER
) {
342 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
345 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
346 } else if (mcast_single_orig
) {
347 ret
= batadv_send_skb_unicast(bat_priv
, skb
,
349 mcast_single_orig
, vid
);
351 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
,
355 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
357 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, dst_hint
,
360 if (ret
== NET_XMIT_DROP
)
364 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
365 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
371 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
374 batadv_hardif_free_ref(primary_if
);
378 void batadv_interface_rx(struct net_device
*soft_iface
,
379 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
380 int hdr_size
, struct batadv_orig_node
*orig_node
)
382 struct batadv_bcast_packet
*batadv_bcast_packet
;
383 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
384 __be16 ethertype
= htons(ETH_P_BATMAN
);
385 struct vlan_ethhdr
*vhdr
;
386 struct ethhdr
*ethhdr
;
390 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
391 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
393 /* check if enough space is available for pulling, and pull */
394 if (!pskb_may_pull(skb
, hdr_size
))
397 skb_pull_rcsum(skb
, hdr_size
);
398 skb_reset_mac_header(skb
);
400 /* clean the netfilter state now that the batman-adv header has been
405 vid
= batadv_get_vid(skb
, 0);
406 ethhdr
= eth_hdr(skb
);
408 switch (ntohs(ethhdr
->h_proto
)) {
410 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
412 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
420 /* skb->dev & skb->pkt_type are set here */
421 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
423 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
425 /* should not be necessary anymore as we use skb_pull_rcsum()
426 * TODO: please verify this and remove this TODO
427 * -- Dec 21st 2009, Simon Wunderlich
430 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
432 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
433 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
434 skb
->len
+ ETH_HLEN
);
436 soft_iface
->last_rx
= jiffies
;
438 /* Let the bridge loop avoidance check the packet. If will
439 * not handle it, we can safely push it up.
441 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
445 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
446 ethhdr
->h_source
, vid
);
448 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
449 /* set the mark on broadcast packets if AP isolation is ON and
450 * the packet is coming from an "isolated" client
452 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
453 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
455 /* save bits in skb->mark not covered by the mask and
456 * apply the mark on the rest
458 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
459 skb
->mark
|= bat_priv
->isolation_mark
;
461 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
462 ethhdr
->h_dest
, vid
)) {
476 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
478 * @softif_vlan: the vlan object to release
480 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan
*vlan
)
485 if (atomic_dec_and_test(&vlan
->refcount
)) {
486 spin_lock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
487 hlist_del_rcu(&vlan
->list
);
488 spin_unlock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
490 kfree_rcu(vlan
, rcu
);
495 * batadv_softif_vlan_get - get the vlan object for a specific vid
496 * @bat_priv: the bat priv with all the soft interface information
497 * @vid: the identifier of the vlan object to retrieve
499 * Returns the private data of the vlan matching the vid passed as argument or
500 * NULL otherwise. The refcounter of the returned object is incremented by 1.
502 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
505 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
508 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
509 if (vlan_tmp
->vid
!= vid
)
512 if (!atomic_inc_not_zero(&vlan_tmp
->refcount
))
524 * batadv_create_vlan - allocate the needed resources for a new vlan
525 * @bat_priv: the bat priv with all the soft interface information
526 * @vid: the VLAN identifier
528 * Returns 0 on success, a negative error otherwise.
530 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
532 struct batadv_softif_vlan
*vlan
;
535 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
537 batadv_softif_vlan_free_ref(vlan
);
541 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
545 vlan
->bat_priv
= bat_priv
;
547 atomic_set(&vlan
->refcount
, 1);
549 atomic_set(&vlan
->ap_isolation
, 0);
551 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
557 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
558 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
559 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
561 /* add a new TT local entry. This one will be marked with the NOPURGE
564 batadv_tt_local_add(bat_priv
->soft_iface
,
565 bat_priv
->soft_iface
->dev_addr
, vid
,
566 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
572 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
573 * @bat_priv: the bat priv with all the soft interface information
574 * @vlan: the object to remove
576 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
577 struct batadv_softif_vlan
*vlan
)
579 /* explicitly remove the associated TT local entry because it is marked
580 * with the NOPURGE flag
582 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
583 vlan
->vid
, "vlan interface destroyed", false);
585 batadv_sysfs_del_vlan(bat_priv
, vlan
);
586 batadv_softif_vlan_free_ref(vlan
);
590 * batadv_interface_add_vid - ndo_add_vid API implementation
591 * @dev: the netdev of the mesh interface
592 * @vid: identifier of the new vlan
594 * Set up all the internal structures for handling the new vlan on top of the
597 * Returns 0 on success or a negative error code in case of failure.
599 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
602 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
603 struct batadv_softif_vlan
*vlan
;
606 /* only 802.1Q vlans are supported.
607 * batman-adv does not know how to handle other types
609 if (proto
!= htons(ETH_P_8021Q
))
612 vid
|= BATADV_VLAN_HAS_TAG
;
614 /* if a new vlan is getting created and it already exists, it means that
615 * it was not deleted yet. batadv_softif_vlan_get() increases the
616 * refcount in order to revive the object.
618 * if it does not exist then create it.
620 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
622 return batadv_softif_create_vlan(bat_priv
, vid
);
624 /* recreate the sysfs object if it was already destroyed (and it should
625 * be since we received a kill_vid() for this vlan
628 ret
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
630 batadv_softif_vlan_free_ref(vlan
);
635 /* add a new TT local entry. This one will be marked with the NOPURGE
636 * flag. This must be added again, even if the vlan object already
637 * exists, because the entry was deleted by kill_vid()
639 batadv_tt_local_add(bat_priv
->soft_iface
,
640 bat_priv
->soft_iface
->dev_addr
, vid
,
641 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
647 * batadv_interface_kill_vid - ndo_kill_vid API implementation
648 * @dev: the netdev of the mesh interface
649 * @vid: identifier of the deleted vlan
651 * Destroy all the internal structures used to handle the vlan identified by vid
652 * on top of the mesh interface
654 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
655 * or -ENOENT if the specified vlan id wasn't registered.
657 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
660 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
661 struct batadv_softif_vlan
*vlan
;
663 /* only 802.1Q vlans are supported. batman-adv does not know how to
666 if (proto
!= htons(ETH_P_8021Q
))
669 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
673 batadv_softif_destroy_vlan(bat_priv
, vlan
);
675 /* finally free the vlan object */
676 batadv_softif_vlan_free_ref(vlan
);
681 /* batman-adv network devices have devices nesting below it and are a special
682 * "super class" of normal network devices; split their locks off into a
683 * separate class since they always nest.
685 static struct lock_class_key batadv_netdev_xmit_lock_key
;
686 static struct lock_class_key batadv_netdev_addr_lock_key
;
689 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
690 * @dev: device which owns the tx queue
691 * @txq: tx queue to modify
692 * @_unused: always NULL
694 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
695 struct netdev_queue
*txq
,
698 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
702 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
703 * @dev: network device to modify
705 static void batadv_set_lockdep_class(struct net_device
*dev
)
707 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
708 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
712 * batadv_softif_destroy_finish - cleans up the remains of a softif
713 * @work: work queue item
715 * Free the parts of the soft interface which can not be removed under
716 * rtnl lock (to prevent deadlock situations).
718 static void batadv_softif_destroy_finish(struct work_struct
*work
)
720 struct batadv_softif_vlan
*vlan
;
721 struct batadv_priv
*bat_priv
;
722 struct net_device
*soft_iface
;
724 bat_priv
= container_of(work
, struct batadv_priv
,
726 soft_iface
= bat_priv
->soft_iface
;
728 /* destroy the "untagged" VLAN */
729 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
731 batadv_softif_destroy_vlan(bat_priv
, vlan
);
732 batadv_softif_vlan_free_ref(vlan
);
735 batadv_sysfs_del_meshif(soft_iface
);
736 unregister_netdev(soft_iface
);
740 * batadv_softif_init_late - late stage initialization of soft interface
741 * @dev: registered network device to modify
743 * Returns error code on failures
745 static int batadv_softif_init_late(struct net_device
*dev
)
747 struct batadv_priv
*bat_priv
;
748 uint32_t random_seqno
;
750 size_t cnt_len
= sizeof(uint64_t) * BATADV_CNT_NUM
;
752 batadv_set_lockdep_class(dev
);
754 bat_priv
= netdev_priv(dev
);
755 bat_priv
->soft_iface
= dev
;
756 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
758 /* batadv_interface_stats() needs to be available as soon as
759 * register_netdevice() has been called
761 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(uint64_t));
762 if (!bat_priv
->bat_counters
)
765 atomic_set(&bat_priv
->aggregated_ogms
, 1);
766 atomic_set(&bat_priv
->bonding
, 0);
767 #ifdef CONFIG_BATMAN_ADV_BLA
768 atomic_set(&bat_priv
->bridge_loop_avoidance
, 1);
770 #ifdef CONFIG_BATMAN_ADV_DAT
771 atomic_set(&bat_priv
->distributed_arp_table
, 1);
773 #ifdef CONFIG_BATMAN_ADV_MCAST
774 bat_priv
->mcast
.flags
= BATADV_NO_FLAGS
;
775 atomic_set(&bat_priv
->multicast_mode
, 1);
776 atomic_set(&bat_priv
->mcast
.num_disabled
, 0);
777 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
778 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
779 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
781 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
782 atomic_set(&bat_priv
->gw_sel_class
, 20);
783 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
784 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
785 atomic_set(&bat_priv
->orig_interval
, 1000);
786 atomic_set(&bat_priv
->hop_penalty
, 30);
787 #ifdef CONFIG_BATMAN_ADV_DEBUG
788 atomic_set(&bat_priv
->log_level
, 0);
790 atomic_set(&bat_priv
->fragmentation
, 1);
791 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
792 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
793 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
795 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
796 atomic_set(&bat_priv
->bcast_seqno
, 1);
797 atomic_set(&bat_priv
->tt
.vn
, 0);
798 atomic_set(&bat_priv
->tt
.local_changes
, 0);
799 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
800 #ifdef CONFIG_BATMAN_ADV_BLA
801 atomic_set(&bat_priv
->bla
.num_requests
, 0);
803 bat_priv
->tt
.last_changeset
= NULL
;
804 bat_priv
->tt
.last_changeset_len
= 0;
805 bat_priv
->isolation_mark
= 0;
806 bat_priv
->isolation_mark_mask
= 0;
808 /* randomize initial seqno to avoid collision */
809 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
810 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
812 bat_priv
->primary_if
= NULL
;
813 bat_priv
->num_ifaces
= 0;
815 batadv_nc_init_bat_priv(bat_priv
);
817 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
819 goto free_bat_counters
;
821 ret
= batadv_debugfs_add_meshif(dev
);
823 goto free_bat_counters
;
825 ret
= batadv_mesh_init(dev
);
832 batadv_debugfs_del_meshif(dev
);
834 free_percpu(bat_priv
->bat_counters
);
835 bat_priv
->bat_counters
= NULL
;
841 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
842 * @dev: batadv_soft_interface used as master interface
843 * @slave_dev: net_device which should become the slave interface
845 * Return 0 if successful or error otherwise.
847 static int batadv_softif_slave_add(struct net_device
*dev
,
848 struct net_device
*slave_dev
)
850 struct batadv_hard_iface
*hard_iface
;
853 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
854 if (!hard_iface
|| hard_iface
->soft_iface
)
857 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
861 batadv_hardif_free_ref(hard_iface
);
866 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
867 * @dev: batadv_soft_interface used as master interface
868 * @slave_dev: net_device which should be removed from the master interface
870 * Return 0 if successful or error otherwise.
872 static int batadv_softif_slave_del(struct net_device
*dev
,
873 struct net_device
*slave_dev
)
875 struct batadv_hard_iface
*hard_iface
;
878 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
880 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
883 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
888 batadv_hardif_free_ref(hard_iface
);
892 static const struct net_device_ops batadv_netdev_ops
= {
893 .ndo_init
= batadv_softif_init_late
,
894 .ndo_open
= batadv_interface_open
,
895 .ndo_stop
= batadv_interface_release
,
896 .ndo_get_stats
= batadv_interface_stats
,
897 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
898 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
899 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
900 .ndo_change_mtu
= batadv_interface_change_mtu
,
901 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
902 .ndo_start_xmit
= batadv_interface_tx
,
903 .ndo_validate_addr
= eth_validate_addr
,
904 .ndo_add_slave
= batadv_softif_slave_add
,
905 .ndo_del_slave
= batadv_softif_slave_del
,
909 * batadv_softif_free - Deconstructor of batadv_soft_interface
910 * @dev: Device to cleanup and remove
912 static void batadv_softif_free(struct net_device
*dev
)
914 batadv_debugfs_del_meshif(dev
);
915 batadv_mesh_free(dev
);
917 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
918 * their tasks. Wait for them all to be finished before freeing the
919 * netdev and its private data (bat_priv)
927 * batadv_softif_init_early - early stage initialization of soft interface
928 * @dev: registered network device to modify
930 static void batadv_softif_init_early(struct net_device
*dev
)
932 struct batadv_priv
*priv
= netdev_priv(dev
);
936 dev
->netdev_ops
= &batadv_netdev_ops
;
937 dev
->destructor
= batadv_softif_free
;
938 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
939 dev
->tx_queue_len
= 0;
941 /* can't call min_mtu, because the needed variables
942 * have not been initialized yet
944 dev
->mtu
= ETH_DATA_LEN
;
945 /* reserve more space in the skbuff for our header */
946 dev
->hard_header_len
= batadv_max_header_len();
948 /* generate random address */
949 eth_hw_addr_random(dev
);
951 dev
->ethtool_ops
= &batadv_ethtool_ops
;
953 memset(priv
, 0, sizeof(*priv
));
956 struct net_device
*batadv_softif_create(const char *name
)
958 struct net_device
*soft_iface
;
961 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
962 NET_NAME_UNKNOWN
, batadv_softif_init_early
);
966 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
968 ret
= register_netdevice(soft_iface
);
970 pr_err("Unable to register the batman interface '%s': %i\n",
972 free_netdev(soft_iface
);
980 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
981 * @soft_iface: the to-be-removed batman-adv interface
983 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
985 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
987 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
991 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
992 * @soft_iface: the to-be-removed batman-adv interface
993 * @head: list pointer
995 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
996 struct list_head
*head
)
998 struct batadv_hard_iface
*hard_iface
;
1000 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
1001 if (hard_iface
->soft_iface
== soft_iface
)
1002 batadv_hardif_disable_interface(hard_iface
,
1003 BATADV_IF_CLEANUP_KEEP
);
1006 batadv_sysfs_del_meshif(soft_iface
);
1007 unregister_netdevice_queue(soft_iface
, head
);
1010 int batadv_softif_is_valid(const struct net_device
*net_dev
)
1012 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
1018 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
1020 .priv_size
= sizeof(struct batadv_priv
),
1021 .setup
= batadv_softif_init_early
,
1022 .dellink
= batadv_softif_destroy_netlink
,
1026 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1029 cmd
->advertising
= 0;
1030 ethtool_cmd_speed_set(cmd
, SPEED_10
);
1031 cmd
->duplex
= DUPLEX_FULL
;
1032 cmd
->port
= PORT_TP
;
1033 cmd
->phy_address
= 0;
1034 cmd
->transceiver
= XCVR_INTERNAL
;
1035 cmd
->autoneg
= AUTONEG_DISABLE
;
1042 static void batadv_get_drvinfo(struct net_device
*dev
,
1043 struct ethtool_drvinfo
*info
)
1045 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
1046 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
1047 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
1048 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
1051 static u32
batadv_get_msglevel(struct net_device
*dev
)
1056 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
1060 static u32
batadv_get_link(struct net_device
*dev
)
1065 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1066 * Declare each description string in struct.name[] to get fixed sized buffer
1067 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1069 static const struct {
1070 const char name
[ETH_GSTRING_LEN
];
1071 } batadv_counters_strings
[] = {
1078 { "forward_bytes" },
1080 { "mgmt_tx_bytes" },
1082 { "mgmt_rx_bytes" },
1084 { "frag_tx_bytes" },
1086 { "frag_rx_bytes" },
1088 { "frag_fwd_bytes" },
1089 { "tt_request_tx" },
1090 { "tt_request_rx" },
1091 { "tt_response_tx" },
1092 { "tt_response_rx" },
1093 { "tt_roam_adv_tx" },
1094 { "tt_roam_adv_rx" },
1095 #ifdef CONFIG_BATMAN_ADV_DAT
1100 { "dat_cached_reply_tx" },
1102 #ifdef CONFIG_BATMAN_ADV_NC
1104 { "nc_code_bytes" },
1106 { "nc_recode_bytes" },
1109 { "nc_decode_bytes" },
1110 { "nc_decode_failed" },
1115 static void batadv_get_strings(struct net_device
*dev
, uint32_t stringset
,
1118 if (stringset
== ETH_SS_STATS
)
1119 memcpy(data
, batadv_counters_strings
,
1120 sizeof(batadv_counters_strings
));
1123 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1124 struct ethtool_stats
*stats
,
1127 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1130 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1131 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1134 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1136 if (stringset
== ETH_SS_STATS
)
1137 return BATADV_CNT_NUM
;