1 /* Copyright (C) 2007-2014 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/>.
19 #include "soft-interface.h"
20 #include "hard-interface.h"
21 #include "distributed-arp-table.h"
25 #include "translation-table.h"
27 #include "gateway_common.h"
28 #include "gateway_client.h"
30 #include "originator.h"
31 #include <linux/slab.h>
32 #include <linux/ethtool.h>
33 #include <linux/etherdevice.h>
34 #include <linux/if_vlan.h>
35 #include "multicast.h"
36 #include "bridge_loop_avoidance.h"
37 #include "network-coding.h"
40 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
41 static void batadv_get_drvinfo(struct net_device
*dev
,
42 struct ethtool_drvinfo
*info
);
43 static u32
batadv_get_msglevel(struct net_device
*dev
);
44 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
);
45 static u32
batadv_get_link(struct net_device
*dev
);
46 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
);
47 static void batadv_get_ethtool_stats(struct net_device
*dev
,
48 struct ethtool_stats
*stats
, u64
*data
);
49 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
);
51 static const struct ethtool_ops batadv_ethtool_ops
= {
52 .get_settings
= batadv_get_settings
,
53 .get_drvinfo
= batadv_get_drvinfo
,
54 .get_msglevel
= batadv_get_msglevel
,
55 .set_msglevel
= batadv_set_msglevel
,
56 .get_link
= batadv_get_link
,
57 .get_strings
= batadv_get_strings
,
58 .get_ethtool_stats
= batadv_get_ethtool_stats
,
59 .get_sset_count
= batadv_get_sset_count
,
62 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
66 /* TODO: We must check if we can release all references to non-payload
67 * data using skb_header_release in our skbs to allow skb_cow_header to
68 * work optimally. This means that those skbs are not allowed to read
69 * or write any data which is before the current position of skb->data
70 * after that call and thus allow other skbs with the same data buffer
71 * to write freely in that area.
73 result
= skb_cow_head(skb
, len
);
81 static int batadv_interface_open(struct net_device
*dev
)
83 netif_start_queue(dev
);
87 static int batadv_interface_release(struct net_device
*dev
)
89 netif_stop_queue(dev
);
93 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
95 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
96 struct net_device_stats
*stats
= &bat_priv
->stats
;
98 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
99 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
100 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
101 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
102 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
106 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
108 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
109 struct sockaddr
*addr
= p
;
110 uint8_t old_addr
[ETH_ALEN
];
112 if (!is_valid_ether_addr(addr
->sa_data
))
113 return -EADDRNOTAVAIL
;
115 ether_addr_copy(old_addr
, dev
->dev_addr
);
116 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
118 /* only modify transtable if it has been initialized before */
119 if (atomic_read(&bat_priv
->mesh_state
) == BATADV_MESH_ACTIVE
) {
120 batadv_tt_local_remove(bat_priv
, old_addr
, BATADV_NO_FLAGS
,
121 "mac address changed", false);
122 batadv_tt_local_add(dev
, addr
->sa_data
, BATADV_NO_FLAGS
,
123 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
129 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
132 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
141 * batadv_interface_set_rx_mode - set the rx mode of a device
142 * @dev: registered network device to modify
144 * We do not actually need to set any rx filters for the virtual batman
145 * soft interface. However a dummy handler enables a user to set static
146 * multicast listeners for instance.
148 static void batadv_interface_set_rx_mode(struct net_device
*dev
)
152 static int batadv_interface_tx(struct sk_buff
*skb
,
153 struct net_device
*soft_iface
)
155 struct ethhdr
*ethhdr
;
156 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
157 struct batadv_hard_iface
*primary_if
= NULL
;
158 struct batadv_bcast_packet
*bcast_packet
;
159 __be16 ethertype
= htons(ETH_P_BATMAN
);
160 static const uint8_t stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
162 static const uint8_t ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
164 enum batadv_dhcp_recipient dhcp_rcp
= BATADV_DHCP_NO
;
165 uint8_t *dst_hint
= NULL
, chaddr
[ETH_ALEN
];
166 struct vlan_ethhdr
*vhdr
;
167 unsigned int header_len
= 0;
168 int data_len
= skb
->len
, ret
;
169 unsigned long brd_delay
= 1;
170 bool do_bcast
= false, client_added
;
174 enum batadv_forw_mode forw_mode
;
175 struct batadv_orig_node
*mcast_single_orig
= NULL
;
177 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
180 soft_iface
->trans_start
= jiffies
;
181 vid
= batadv_get_vid(skb
, 0);
182 ethhdr
= eth_hdr(skb
);
184 switch (ntohs(ethhdr
->h_proto
)) {
186 vhdr
= vlan_eth_hdr(skb
);
188 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
196 if (batadv_bla_tx(bat_priv
, skb
, vid
))
199 /* skb->data might have been reallocated by batadv_bla_tx() */
200 ethhdr
= eth_hdr(skb
);
202 /* Register the client MAC in the transtable */
203 if (!is_multicast_ether_addr(ethhdr
->h_source
)) {
204 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
211 /* don't accept stp packets. STP does not help in meshes.
212 * better use the bridge loop avoidance ...
214 * The same goes for ECTP sent at least by some Cisco Switches,
215 * it might confuse the mesh when used with bridge loop avoidance.
217 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
220 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
223 gw_mode
= atomic_read(&bat_priv
->gw_mode
);
224 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
225 /* if gw mode is off, broadcast every packet */
226 if (gw_mode
== BATADV_GW_MODE_OFF
) {
231 dhcp_rcp
= batadv_gw_dhcp_recipient_get(skb
, &header_len
,
233 /* skb->data may have been modified by
234 * batadv_gw_dhcp_recipient_get()
236 ethhdr
= eth_hdr(skb
);
237 /* if gw_mode is on, broadcast any non-DHCP message.
238 * All the DHCP packets are going to be sent as unicast
240 if (dhcp_rcp
== BATADV_DHCP_NO
) {
245 if (dhcp_rcp
== BATADV_DHCP_TO_CLIENT
)
247 else if ((gw_mode
== BATADV_GW_MODE_SERVER
) &&
248 (dhcp_rcp
== BATADV_DHCP_TO_SERVER
))
249 /* gateways should not forward any DHCP message if
250 * directed to a DHCP server
255 if (do_bcast
&& !is_broadcast_ether_addr(ethhdr
->h_dest
)) {
256 forw_mode
= batadv_mcast_forw_mode(bat_priv
, skb
,
258 if (forw_mode
== BATADV_FORW_NONE
)
261 if (forw_mode
== BATADV_FORW_SINGLE
)
266 batadv_skb_set_priority(skb
, 0);
268 /* ethernet packet should be broadcasted */
270 primary_if
= batadv_primary_if_get_selected(bat_priv
);
274 /* in case of ARP request, we do not immediately broadcasti the
275 * packet, instead we first wait for DAT to try to retrieve the
278 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
279 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
281 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
284 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
285 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
286 bcast_packet
->ttl
= BATADV_TTL
;
288 /* batman packet type: broadcast */
289 bcast_packet
->packet_type
= BATADV_BCAST
;
290 bcast_packet
->reserved
= 0;
292 /* hw address of first interface is the orig mac because only
293 * this mac is known throughout the mesh
295 ether_addr_copy(bcast_packet
->orig
,
296 primary_if
->net_dev
->dev_addr
);
298 /* set broadcast sequence number */
299 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
300 bcast_packet
->seqno
= htonl(seqno
);
302 batadv_add_bcast_packet_to_list(bat_priv
, skb
, brd_delay
);
304 /* a copy is stored in the bcast list, therefore removing
311 /* DHCP packets going to a server will use the GW feature */
312 if (dhcp_rcp
== BATADV_DHCP_TO_SERVER
) {
313 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
316 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
317 } else if (mcast_single_orig
) {
318 ret
= batadv_send_skb_unicast(bat_priv
, skb
,
320 mcast_single_orig
, vid
);
322 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
,
326 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
328 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, dst_hint
,
331 if (ret
== NET_XMIT_DROP
)
335 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
336 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
342 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
345 batadv_hardif_free_ref(primary_if
);
349 void batadv_interface_rx(struct net_device
*soft_iface
,
350 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
351 int hdr_size
, struct batadv_orig_node
*orig_node
)
353 struct batadv_bcast_packet
*batadv_bcast_packet
;
354 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
355 __be16 ethertype
= htons(ETH_P_BATMAN
);
356 struct vlan_ethhdr
*vhdr
;
357 struct ethhdr
*ethhdr
;
361 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
362 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
364 /* check if enough space is available for pulling, and pull */
365 if (!pskb_may_pull(skb
, hdr_size
))
368 skb_pull_rcsum(skb
, hdr_size
);
369 skb_reset_mac_header(skb
);
371 /* clean the netfilter state now that the batman-adv header has been
376 vid
= batadv_get_vid(skb
, 0);
377 ethhdr
= eth_hdr(skb
);
379 switch (ntohs(ethhdr
->h_proto
)) {
381 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
383 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
391 /* skb->dev & skb->pkt_type are set here */
392 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
394 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
396 /* should not be necessary anymore as we use skb_pull_rcsum()
397 * TODO: please verify this and remove this TODO
398 * -- Dec 21st 2009, Simon Wunderlich
401 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
403 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
404 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
405 skb
->len
+ ETH_HLEN
);
407 soft_iface
->last_rx
= jiffies
;
409 /* Let the bridge loop avoidance check the packet. If will
410 * not handle it, we can safely push it up.
412 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
416 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
417 ethhdr
->h_source
, vid
);
419 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
420 /* set the mark on broadcast packets if AP isolation is ON and
421 * the packet is coming from an "isolated" client
423 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
424 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
426 /* save bits in skb->mark not covered by the mask and
427 * apply the mark on the rest
429 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
430 skb
->mark
|= bat_priv
->isolation_mark
;
432 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
433 ethhdr
->h_dest
, vid
)) {
447 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
449 * @softif_vlan: the vlan object to release
451 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan
*softif_vlan
)
453 if (atomic_dec_and_test(&softif_vlan
->refcount
))
454 kfree_rcu(softif_vlan
, rcu
);
458 * batadv_softif_vlan_get - get the vlan object for a specific vid
459 * @bat_priv: the bat priv with all the soft interface information
460 * @vid: the identifier of the vlan object to retrieve
462 * Returns the private data of the vlan matching the vid passed as argument or
463 * NULL otherwise. The refcounter of the returned object is incremented by 1.
465 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
468 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
471 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
472 if (vlan_tmp
->vid
!= vid
)
475 if (!atomic_inc_not_zero(&vlan_tmp
->refcount
))
487 * batadv_create_vlan - allocate the needed resources for a new vlan
488 * @bat_priv: the bat priv with all the soft interface information
489 * @vid: the VLAN identifier
491 * Returns 0 on success, a negative error otherwise.
493 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
495 struct batadv_softif_vlan
*vlan
;
498 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
500 batadv_softif_vlan_free_ref(vlan
);
504 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
509 atomic_set(&vlan
->refcount
, 1);
511 atomic_set(&vlan
->ap_isolation
, 0);
513 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
519 /* add a new TT local entry. This one will be marked with the NOPURGE
522 batadv_tt_local_add(bat_priv
->soft_iface
,
523 bat_priv
->soft_iface
->dev_addr
, vid
,
524 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
526 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
527 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
528 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
534 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
535 * @bat_priv: the bat priv with all the soft interface information
536 * @vlan: the object to remove
538 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
539 struct batadv_softif_vlan
*vlan
)
541 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
542 hlist_del_rcu(&vlan
->list
);
543 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
545 batadv_sysfs_del_vlan(bat_priv
, vlan
);
547 /* explicitly remove the associated TT local entry because it is marked
548 * with the NOPURGE flag
550 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
551 vlan
->vid
, "vlan interface destroyed", false);
553 batadv_softif_vlan_free_ref(vlan
);
557 * batadv_interface_add_vid - ndo_add_vid API implementation
558 * @dev: the netdev of the mesh interface
559 * @vid: identifier of the new vlan
561 * Set up all the internal structures for handling the new vlan on top of the
564 * Returns 0 on success or a negative error code in case of failure.
566 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
569 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
571 /* only 802.1Q vlans are supported.
572 * batman-adv does not know how to handle other types
574 if (proto
!= htons(ETH_P_8021Q
))
577 vid
|= BATADV_VLAN_HAS_TAG
;
579 return batadv_softif_create_vlan(bat_priv
, vid
);
583 * batadv_interface_kill_vid - ndo_kill_vid API implementation
584 * @dev: the netdev of the mesh interface
585 * @vid: identifier of the deleted vlan
587 * Destroy all the internal structures used to handle the vlan identified by vid
588 * on top of the mesh interface
590 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
591 * or -ENOENT if the specified vlan id wasn't registered.
593 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
596 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
597 struct batadv_softif_vlan
*vlan
;
599 /* only 802.1Q vlans are supported. batman-adv does not know how to
602 if (proto
!= htons(ETH_P_8021Q
))
605 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
609 batadv_softif_destroy_vlan(bat_priv
, vlan
);
611 /* finally free the vlan object */
612 batadv_softif_vlan_free_ref(vlan
);
617 /* batman-adv network devices have devices nesting below it and are a special
618 * "super class" of normal network devices; split their locks off into a
619 * separate class since they always nest.
621 static struct lock_class_key batadv_netdev_xmit_lock_key
;
622 static struct lock_class_key batadv_netdev_addr_lock_key
;
625 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
626 * @dev: device which owns the tx queue
627 * @txq: tx queue to modify
628 * @_unused: always NULL
630 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
631 struct netdev_queue
*txq
,
634 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
638 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
639 * @dev: network device to modify
641 static void batadv_set_lockdep_class(struct net_device
*dev
)
643 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
644 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
648 * batadv_softif_destroy_finish - cleans up the remains of a softif
649 * @work: work queue item
651 * Free the parts of the soft interface which can not be removed under
652 * rtnl lock (to prevent deadlock situations).
654 static void batadv_softif_destroy_finish(struct work_struct
*work
)
656 struct batadv_softif_vlan
*vlan
;
657 struct batadv_priv
*bat_priv
;
658 struct net_device
*soft_iface
;
660 bat_priv
= container_of(work
, struct batadv_priv
,
662 soft_iface
= bat_priv
->soft_iface
;
664 /* destroy the "untagged" VLAN */
665 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
667 batadv_softif_destroy_vlan(bat_priv
, vlan
);
668 batadv_softif_vlan_free_ref(vlan
);
671 batadv_sysfs_del_meshif(soft_iface
);
672 unregister_netdev(soft_iface
);
676 * batadv_softif_init_late - late stage initialization of soft interface
677 * @dev: registered network device to modify
679 * Returns error code on failures
681 static int batadv_softif_init_late(struct net_device
*dev
)
683 struct batadv_priv
*bat_priv
;
684 uint32_t random_seqno
;
686 size_t cnt_len
= sizeof(uint64_t) * BATADV_CNT_NUM
;
688 batadv_set_lockdep_class(dev
);
690 bat_priv
= netdev_priv(dev
);
691 bat_priv
->soft_iface
= dev
;
692 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
694 /* batadv_interface_stats() needs to be available as soon as
695 * register_netdevice() has been called
697 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(uint64_t));
698 if (!bat_priv
->bat_counters
)
701 atomic_set(&bat_priv
->aggregated_ogms
, 1);
702 atomic_set(&bat_priv
->bonding
, 0);
703 #ifdef CONFIG_BATMAN_ADV_BLA
704 atomic_set(&bat_priv
->bridge_loop_avoidance
, 0);
706 #ifdef CONFIG_BATMAN_ADV_DAT
707 atomic_set(&bat_priv
->distributed_arp_table
, 1);
709 #ifdef CONFIG_BATMAN_ADV_MCAST
710 bat_priv
->mcast
.flags
= BATADV_NO_FLAGS
;
711 atomic_set(&bat_priv
->multicast_mode
, 1);
712 atomic_set(&bat_priv
->mcast
.num_disabled
, 0);
713 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
714 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
715 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
717 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
718 atomic_set(&bat_priv
->gw_sel_class
, 20);
719 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
720 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
721 atomic_set(&bat_priv
->orig_interval
, 1000);
722 atomic_set(&bat_priv
->hop_penalty
, 15);
723 #ifdef CONFIG_BATMAN_ADV_DEBUG
724 atomic_set(&bat_priv
->log_level
, 0);
726 atomic_set(&bat_priv
->fragmentation
, 1);
727 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
728 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
729 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
731 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
732 atomic_set(&bat_priv
->bcast_seqno
, 1);
733 atomic_set(&bat_priv
->tt
.vn
, 0);
734 atomic_set(&bat_priv
->tt
.local_changes
, 0);
735 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
736 #ifdef CONFIG_BATMAN_ADV_BLA
737 atomic_set(&bat_priv
->bla
.num_requests
, 0);
739 bat_priv
->tt
.last_changeset
= NULL
;
740 bat_priv
->tt
.last_changeset_len
= 0;
741 bat_priv
->isolation_mark
= 0;
742 bat_priv
->isolation_mark_mask
= 0;
744 /* randomize initial seqno to avoid collision */
745 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
746 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
748 bat_priv
->primary_if
= NULL
;
749 bat_priv
->num_ifaces
= 0;
751 batadv_nc_init_bat_priv(bat_priv
);
753 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
755 goto free_bat_counters
;
757 ret
= batadv_debugfs_add_meshif(dev
);
759 goto free_bat_counters
;
761 ret
= batadv_mesh_init(dev
);
768 batadv_debugfs_del_meshif(dev
);
770 free_percpu(bat_priv
->bat_counters
);
771 bat_priv
->bat_counters
= NULL
;
777 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
778 * @dev: batadv_soft_interface used as master interface
779 * @slave_dev: net_device which should become the slave interface
781 * Return 0 if successful or error otherwise.
783 static int batadv_softif_slave_add(struct net_device
*dev
,
784 struct net_device
*slave_dev
)
786 struct batadv_hard_iface
*hard_iface
;
789 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
790 if (!hard_iface
|| hard_iface
->soft_iface
!= NULL
)
793 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
797 batadv_hardif_free_ref(hard_iface
);
802 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
803 * @dev: batadv_soft_interface used as master interface
804 * @slave_dev: net_device which should be removed from the master interface
806 * Return 0 if successful or error otherwise.
808 static int batadv_softif_slave_del(struct net_device
*dev
,
809 struct net_device
*slave_dev
)
811 struct batadv_hard_iface
*hard_iface
;
814 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
816 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
819 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
824 batadv_hardif_free_ref(hard_iface
);
828 static const struct net_device_ops batadv_netdev_ops
= {
829 .ndo_init
= batadv_softif_init_late
,
830 .ndo_open
= batadv_interface_open
,
831 .ndo_stop
= batadv_interface_release
,
832 .ndo_get_stats
= batadv_interface_stats
,
833 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
834 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
835 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
836 .ndo_change_mtu
= batadv_interface_change_mtu
,
837 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
838 .ndo_start_xmit
= batadv_interface_tx
,
839 .ndo_validate_addr
= eth_validate_addr
,
840 .ndo_add_slave
= batadv_softif_slave_add
,
841 .ndo_del_slave
= batadv_softif_slave_del
,
845 * batadv_softif_free - Deconstructor of batadv_soft_interface
846 * @dev: Device to cleanup and remove
848 static void batadv_softif_free(struct net_device
*dev
)
850 batadv_debugfs_del_meshif(dev
);
851 batadv_mesh_free(dev
);
853 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
854 * their tasks. Wait for them all to be finished before freeing the
855 * netdev and its private data (bat_priv)
863 * batadv_softif_init_early - early stage initialization of soft interface
864 * @dev: registered network device to modify
866 static void batadv_softif_init_early(struct net_device
*dev
)
868 struct batadv_priv
*priv
= netdev_priv(dev
);
872 dev
->netdev_ops
= &batadv_netdev_ops
;
873 dev
->destructor
= batadv_softif_free
;
874 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
875 dev
->tx_queue_len
= 0;
877 /* can't call min_mtu, because the needed variables
878 * have not been initialized yet
880 dev
->mtu
= ETH_DATA_LEN
;
881 /* reserve more space in the skbuff for our header */
882 dev
->hard_header_len
= batadv_max_header_len();
884 /* generate random address */
885 eth_hw_addr_random(dev
);
887 dev
->ethtool_ops
= &batadv_ethtool_ops
;
889 memset(priv
, 0, sizeof(*priv
));
892 struct net_device
*batadv_softif_create(const char *name
)
894 struct net_device
*soft_iface
;
897 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
898 batadv_softif_init_early
);
902 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
904 ret
= register_netdevice(soft_iface
);
906 pr_err("Unable to register the batman interface '%s': %i\n",
908 free_netdev(soft_iface
);
916 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
917 * @soft_iface: the to-be-removed batman-adv interface
919 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
921 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
923 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
927 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
928 * @soft_iface: the to-be-removed batman-adv interface
929 * @head: list pointer
931 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
932 struct list_head
*head
)
934 struct batadv_hard_iface
*hard_iface
;
936 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
937 if (hard_iface
->soft_iface
== soft_iface
)
938 batadv_hardif_disable_interface(hard_iface
,
939 BATADV_IF_CLEANUP_KEEP
);
942 batadv_sysfs_del_meshif(soft_iface
);
943 unregister_netdevice_queue(soft_iface
, head
);
946 int batadv_softif_is_valid(const struct net_device
*net_dev
)
948 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
954 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
956 .priv_size
= sizeof(struct batadv_priv
),
957 .setup
= batadv_softif_init_early
,
958 .dellink
= batadv_softif_destroy_netlink
,
962 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
965 cmd
->advertising
= 0;
966 ethtool_cmd_speed_set(cmd
, SPEED_10
);
967 cmd
->duplex
= DUPLEX_FULL
;
969 cmd
->phy_address
= 0;
970 cmd
->transceiver
= XCVR_INTERNAL
;
971 cmd
->autoneg
= AUTONEG_DISABLE
;
978 static void batadv_get_drvinfo(struct net_device
*dev
,
979 struct ethtool_drvinfo
*info
)
981 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
982 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
983 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
984 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
987 static u32
batadv_get_msglevel(struct net_device
*dev
)
992 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
996 static u32
batadv_get_link(struct net_device
*dev
)
1001 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1002 * Declare each description string in struct.name[] to get fixed sized buffer
1003 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1005 static const struct {
1006 const char name
[ETH_GSTRING_LEN
];
1007 } batadv_counters_strings
[] = {
1014 { "forward_bytes" },
1016 { "mgmt_tx_bytes" },
1018 { "mgmt_rx_bytes" },
1020 { "frag_tx_bytes" },
1022 { "frag_rx_bytes" },
1024 { "frag_fwd_bytes" },
1025 { "tt_request_tx" },
1026 { "tt_request_rx" },
1027 { "tt_response_tx" },
1028 { "tt_response_rx" },
1029 { "tt_roam_adv_tx" },
1030 { "tt_roam_adv_rx" },
1031 #ifdef CONFIG_BATMAN_ADV_DAT
1036 { "dat_cached_reply_tx" },
1038 #ifdef CONFIG_BATMAN_ADV_NC
1040 { "nc_code_bytes" },
1042 { "nc_recode_bytes" },
1045 { "nc_decode_bytes" },
1046 { "nc_decode_failed" },
1051 static void batadv_get_strings(struct net_device
*dev
, uint32_t stringset
,
1054 if (stringset
== ETH_SS_STATS
)
1055 memcpy(data
, batadv_counters_strings
,
1056 sizeof(batadv_counters_strings
));
1059 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1060 struct ethtool_stats
*stats
,
1063 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1066 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1067 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1070 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1072 if (stringset
== ETH_SS_STATS
)
1073 return BATADV_CNT_NUM
;