1 /* Copyright (C) 2007-2013 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, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include "soft-interface.h"
22 #include "hard-interface.h"
23 #include "distributed-arp-table.h"
27 #include "translation-table.h"
29 #include "gateway_common.h"
30 #include "gateway_client.h"
32 #include "originator.h"
33 #include <linux/slab.h>
34 #include <linux/ethtool.h>
35 #include <linux/etherdevice.h>
36 #include <linux/if_vlan.h>
37 #include "bridge_loop_avoidance.h"
38 #include "network-coding.h"
41 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
42 static void batadv_get_drvinfo(struct net_device
*dev
,
43 struct ethtool_drvinfo
*info
);
44 static u32
batadv_get_msglevel(struct net_device
*dev
);
45 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
);
46 static u32
batadv_get_link(struct net_device
*dev
);
47 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
);
48 static void batadv_get_ethtool_stats(struct net_device
*dev
,
49 struct ethtool_stats
*stats
, u64
*data
);
50 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
);
52 static const struct ethtool_ops batadv_ethtool_ops
= {
53 .get_settings
= batadv_get_settings
,
54 .get_drvinfo
= batadv_get_drvinfo
,
55 .get_msglevel
= batadv_get_msglevel
,
56 .set_msglevel
= batadv_set_msglevel
,
57 .get_link
= batadv_get_link
,
58 .get_strings
= batadv_get_strings
,
59 .get_ethtool_stats
= batadv_get_ethtool_stats
,
60 .get_sset_count
= batadv_get_sset_count
,
63 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
67 /* TODO: We must check if we can release all references to non-payload
68 * data using skb_header_release in our skbs to allow skb_cow_header to
69 * work optimally. This means that those skbs are not allowed to read
70 * or write any data which is before the current position of skb->data
71 * after that call and thus allow other skbs with the same data buffer
72 * to write freely in that area.
74 result
= skb_cow_head(skb
, len
);
82 static int batadv_interface_open(struct net_device
*dev
)
84 netif_start_queue(dev
);
88 static int batadv_interface_release(struct net_device
*dev
)
90 netif_stop_queue(dev
);
94 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
96 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
97 struct net_device_stats
*stats
= &bat_priv
->stats
;
99 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
100 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
101 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
102 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
103 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
107 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
109 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
110 struct sockaddr
*addr
= p
;
111 uint8_t old_addr
[ETH_ALEN
];
113 if (!is_valid_ether_addr(addr
->sa_data
))
114 return -EADDRNOTAVAIL
;
116 memcpy(old_addr
, dev
->dev_addr
, ETH_ALEN
);
117 memcpy(dev
->dev_addr
, addr
->sa_data
, ETH_ALEN
);
119 /* only modify transtable if it has been initialized before */
120 if (atomic_read(&bat_priv
->mesh_state
) == BATADV_MESH_ACTIVE
) {
121 batadv_tt_local_remove(bat_priv
, old_addr
, BATADV_NO_FLAGS
,
122 "mac address changed", false);
123 batadv_tt_local_add(dev
, addr
->sa_data
, BATADV_NO_FLAGS
,
124 BATADV_NULL_IFINDEX
);
130 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
133 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
142 * batadv_interface_set_rx_mode - set the rx mode of a device
143 * @dev: registered network device to modify
145 * We do not actually need to set any rx filters for the virtual batman
146 * soft interface. However a dummy handler enables a user to set static
147 * multicast listeners for instance.
149 static void batadv_interface_set_rx_mode(struct net_device
*dev
)
153 static int batadv_interface_tx(struct sk_buff
*skb
,
154 struct net_device
*soft_iface
)
156 struct ethhdr
*ethhdr
;
157 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
158 struct batadv_hard_iface
*primary_if
= NULL
;
159 struct batadv_bcast_packet
*bcast_packet
;
160 __be16 ethertype
= htons(ETH_P_BATMAN
);
161 static const uint8_t stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
163 static const uint8_t ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
165 struct vlan_ethhdr
*vhdr
;
166 unsigned int header_len
= 0;
167 int data_len
= skb
->len
, ret
;
168 unsigned long brd_delay
= 1;
169 bool do_bcast
= false, client_added
;
173 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
176 soft_iface
->trans_start
= jiffies
;
177 vid
= batadv_get_vid(skb
, 0);
178 ethhdr
= (struct ethhdr
*)skb
->data
;
180 switch (ntohs(ethhdr
->h_proto
)) {
182 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
184 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
192 if (batadv_bla_tx(bat_priv
, skb
, vid
))
195 /* skb->data might have been reallocated by batadv_bla_tx() */
196 ethhdr
= (struct ethhdr
*)skb
->data
;
198 /* Register the client MAC in the transtable */
199 if (!is_multicast_ether_addr(ethhdr
->h_source
)) {
200 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
206 /* don't accept stp packets. STP does not help in meshes.
207 * better use the bridge loop avoidance ...
209 * The same goes for ECTP sent at least by some Cisco Switches,
210 * it might confuse the mesh when used with bridge loop avoidance.
212 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
215 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
218 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
221 switch (atomic_read(&bat_priv
->gw_mode
)) {
222 case BATADV_GW_MODE_SERVER
:
223 /* gateway servers should not send dhcp
224 * requests into the mesh
226 ret
= batadv_gw_is_dhcp_target(skb
, &header_len
);
230 case BATADV_GW_MODE_CLIENT
:
231 /* gateway clients should send dhcp requests
232 * via unicast to their gateway
234 ret
= batadv_gw_is_dhcp_target(skb
, &header_len
);
238 case BATADV_GW_MODE_OFF
:
243 /* reminder: ethhdr might have become unusable from here on
244 * (batadv_gw_is_dhcp_target() might have reallocated skb data)
248 batadv_skb_set_priority(skb
, 0);
250 /* ethernet packet should be broadcasted */
252 primary_if
= batadv_primary_if_get_selected(bat_priv
);
256 /* in case of ARP request, we do not immediately broadcasti the
257 * packet, instead we first wait for DAT to try to retrieve the
260 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
261 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
263 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
266 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
267 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
268 bcast_packet
->ttl
= BATADV_TTL
;
270 /* batman packet type: broadcast */
271 bcast_packet
->packet_type
= BATADV_BCAST
;
272 bcast_packet
->reserved
= 0;
274 /* hw address of first interface is the orig mac because only
275 * this mac is known throughout the mesh
277 memcpy(bcast_packet
->orig
,
278 primary_if
->net_dev
->dev_addr
, ETH_ALEN
);
280 /* set broadcast sequence number */
281 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
282 bcast_packet
->seqno
= htonl(seqno
);
284 batadv_add_bcast_packet_to_list(bat_priv
, skb
, brd_delay
);
286 /* a copy is stored in the bcast list, therefore removing
293 if (atomic_read(&bat_priv
->gw_mode
) != BATADV_GW_MODE_OFF
) {
294 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
299 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
302 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
304 if (is_multicast_ether_addr(ethhdr
->h_dest
))
305 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
307 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, vid
);
309 if (ret
== NET_XMIT_DROP
)
313 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
314 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
320 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
323 batadv_hardif_free_ref(primary_if
);
327 void batadv_interface_rx(struct net_device
*soft_iface
,
328 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
329 int hdr_size
, struct batadv_orig_node
*orig_node
)
331 struct batadv_bcast_packet
*batadv_bcast_packet
;
332 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
333 __be16 ethertype
= htons(ETH_P_BATMAN
);
334 struct vlan_ethhdr
*vhdr
;
335 struct ethhdr
*ethhdr
;
339 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
340 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
342 /* check if enough space is available for pulling, and pull */
343 if (!pskb_may_pull(skb
, hdr_size
))
346 skb_pull_rcsum(skb
, hdr_size
);
347 skb_reset_mac_header(skb
);
349 /* clean the netfilter state now that the batman-adv header has been
354 vid
= batadv_get_vid(skb
, 0);
355 ethhdr
= eth_hdr(skb
);
357 switch (ntohs(ethhdr
->h_proto
)) {
359 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
361 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
369 /* skb->dev & skb->pkt_type are set here */
370 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
372 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
374 /* should not be necessary anymore as we use skb_pull_rcsum()
375 * TODO: please verify this and remove this TODO
376 * -- Dec 21st 2009, Simon Wunderlich
379 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
381 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
382 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
383 skb
->len
+ ETH_HLEN
);
385 soft_iface
->last_rx
= jiffies
;
387 /* Let the bridge loop avoidance check the packet. If will
388 * not handle it, we can safely push it up.
390 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
394 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
395 ethhdr
->h_source
, vid
);
397 if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
, ethhdr
->h_dest
,
411 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
413 * @softif_vlan: the vlan object to release
415 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan
*softif_vlan
)
417 if (atomic_dec_and_test(&softif_vlan
->refcount
))
418 kfree_rcu(softif_vlan
, rcu
);
422 * batadv_softif_vlan_get - get the vlan object for a specific vid
423 * @bat_priv: the bat priv with all the soft interface information
424 * @vid: the identifier of the vlan object to retrieve
426 * Returns the private data of the vlan matching the vid passed as argument or
427 * NULL otherwise. The refcounter of the returned object is incremented by 1.
429 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
432 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
435 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
436 if (vlan_tmp
->vid
!= vid
)
439 if (!atomic_inc_not_zero(&vlan_tmp
->refcount
))
451 * batadv_create_vlan - allocate the needed resources for a new vlan
452 * @bat_priv: the bat priv with all the soft interface information
453 * @vid: the VLAN identifier
455 * Returns 0 on success, a negative error otherwise.
457 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
459 struct batadv_softif_vlan
*vlan
;
462 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
464 batadv_softif_vlan_free_ref(vlan
);
468 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
473 atomic_set(&vlan
->refcount
, 1);
475 atomic_set(&vlan
->ap_isolation
, 0);
477 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
483 /* add a new TT local entry. This one will be marked with the NOPURGE
486 batadv_tt_local_add(bat_priv
->soft_iface
,
487 bat_priv
->soft_iface
->dev_addr
, vid
,
488 BATADV_NULL_IFINDEX
);
490 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
491 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
492 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
498 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
499 * @bat_priv: the bat priv with all the soft interface information
500 * @vlan: the object to remove
502 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
503 struct batadv_softif_vlan
*vlan
)
505 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
506 hlist_del_rcu(&vlan
->list
);
507 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
509 batadv_sysfs_del_vlan(bat_priv
, vlan
);
511 /* explicitly remove the associated TT local entry because it is marked
512 * with the NOPURGE flag
514 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
515 vlan
->vid
, "vlan interface destroyed", false);
517 batadv_softif_vlan_free_ref(vlan
);
521 * batadv_interface_add_vid - ndo_add_vid API implementation
522 * @dev: the netdev of the mesh interface
523 * @vid: identifier of the new vlan
525 * Set up all the internal structures for handling the new vlan on top of the
528 * Returns 0 on success or a negative error code in case of failure.
530 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
533 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
535 /* only 802.1Q vlans are supported.
536 * batman-adv does not know how to handle other types
538 if (proto
!= htons(ETH_P_8021Q
))
541 vid
|= BATADV_VLAN_HAS_TAG
;
543 return batadv_softif_create_vlan(bat_priv
, vid
);
547 * batadv_interface_kill_vid - ndo_kill_vid API implementation
548 * @dev: the netdev of the mesh interface
549 * @vid: identifier of the deleted vlan
551 * Destroy all the internal structures used to handle the vlan identified by vid
552 * on top of the mesh interface
554 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
555 * or -ENOENT if the specified vlan id wasn't registered.
557 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
560 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
561 struct batadv_softif_vlan
*vlan
;
563 /* only 802.1Q vlans are supported. batman-adv does not know how to
566 if (proto
!= htons(ETH_P_8021Q
))
569 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
573 batadv_softif_destroy_vlan(bat_priv
, vlan
);
575 /* finally free the vlan object */
576 batadv_softif_vlan_free_ref(vlan
);
581 /* batman-adv network devices have devices nesting below it and are a special
582 * "super class" of normal network devices; split their locks off into a
583 * separate class since they always nest.
585 static struct lock_class_key batadv_netdev_xmit_lock_key
;
586 static struct lock_class_key batadv_netdev_addr_lock_key
;
589 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
590 * @dev: device which owns the tx queue
591 * @txq: tx queue to modify
592 * @_unused: always NULL
594 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
595 struct netdev_queue
*txq
,
598 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
602 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
603 * @dev: network device to modify
605 static void batadv_set_lockdep_class(struct net_device
*dev
)
607 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
608 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
612 * batadv_softif_destroy_finish - cleans up the remains of a softif
613 * @work: work queue item
615 * Free the parts of the soft interface which can not be removed under
616 * rtnl lock (to prevent deadlock situations).
618 static void batadv_softif_destroy_finish(struct work_struct
*work
)
620 struct batadv_softif_vlan
*vlan
;
621 struct batadv_priv
*bat_priv
;
622 struct net_device
*soft_iface
;
624 bat_priv
= container_of(work
, struct batadv_priv
,
626 soft_iface
= bat_priv
->soft_iface
;
628 /* destroy the "untagged" VLAN */
629 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
631 batadv_softif_destroy_vlan(bat_priv
, vlan
);
632 batadv_softif_vlan_free_ref(vlan
);
635 batadv_sysfs_del_meshif(soft_iface
);
638 unregister_netdevice(soft_iface
);
643 * batadv_softif_init_late - late stage initialization of soft interface
644 * @dev: registered network device to modify
646 * Returns error code on failures
648 static int batadv_softif_init_late(struct net_device
*dev
)
650 struct batadv_priv
*bat_priv
;
651 uint32_t random_seqno
;
653 size_t cnt_len
= sizeof(uint64_t) * BATADV_CNT_NUM
;
655 batadv_set_lockdep_class(dev
);
657 bat_priv
= netdev_priv(dev
);
658 bat_priv
->soft_iface
= dev
;
659 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
661 /* batadv_interface_stats() needs to be available as soon as
662 * register_netdevice() has been called
664 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(uint64_t));
665 if (!bat_priv
->bat_counters
)
668 atomic_set(&bat_priv
->aggregated_ogms
, 1);
669 atomic_set(&bat_priv
->bonding
, 0);
670 #ifdef CONFIG_BATMAN_ADV_BLA
671 atomic_set(&bat_priv
->bridge_loop_avoidance
, 0);
673 #ifdef CONFIG_BATMAN_ADV_DAT
674 atomic_set(&bat_priv
->distributed_arp_table
, 1);
676 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
677 atomic_set(&bat_priv
->gw_sel_class
, 20);
678 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
679 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
680 atomic_set(&bat_priv
->orig_interval
, 1000);
681 atomic_set(&bat_priv
->hop_penalty
, 30);
682 #ifdef CONFIG_BATMAN_ADV_DEBUG
683 atomic_set(&bat_priv
->log_level
, 0);
685 atomic_set(&bat_priv
->fragmentation
, 1);
686 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
687 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
688 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
690 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
691 atomic_set(&bat_priv
->bcast_seqno
, 1);
692 atomic_set(&bat_priv
->tt
.vn
, 0);
693 atomic_set(&bat_priv
->tt
.local_changes
, 0);
694 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
695 #ifdef CONFIG_BATMAN_ADV_BLA
696 atomic_set(&bat_priv
->bla
.num_requests
, 0);
698 bat_priv
->tt
.last_changeset
= NULL
;
699 bat_priv
->tt
.last_changeset_len
= 0;
701 /* randomize initial seqno to avoid collision */
702 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
703 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
705 bat_priv
->primary_if
= NULL
;
706 bat_priv
->num_ifaces
= 0;
708 batadv_nc_init_bat_priv(bat_priv
);
710 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
712 goto free_bat_counters
;
714 ret
= batadv_debugfs_add_meshif(dev
);
716 goto free_bat_counters
;
718 ret
= batadv_mesh_init(dev
);
725 batadv_debugfs_del_meshif(dev
);
727 free_percpu(bat_priv
->bat_counters
);
728 bat_priv
->bat_counters
= NULL
;
734 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
735 * @dev: batadv_soft_interface used as master interface
736 * @slave_dev: net_device which should become the slave interface
738 * Return 0 if successful or error otherwise.
740 static int batadv_softif_slave_add(struct net_device
*dev
,
741 struct net_device
*slave_dev
)
743 struct batadv_hard_iface
*hard_iface
;
746 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
747 if (!hard_iface
|| hard_iface
->soft_iface
!= NULL
)
750 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
754 batadv_hardif_free_ref(hard_iface
);
759 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
760 * @dev: batadv_soft_interface used as master interface
761 * @slave_dev: net_device which should be removed from the master interface
763 * Return 0 if successful or error otherwise.
765 static int batadv_softif_slave_del(struct net_device
*dev
,
766 struct net_device
*slave_dev
)
768 struct batadv_hard_iface
*hard_iface
;
771 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
773 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
776 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
781 batadv_hardif_free_ref(hard_iface
);
785 static const struct net_device_ops batadv_netdev_ops
= {
786 .ndo_init
= batadv_softif_init_late
,
787 .ndo_open
= batadv_interface_open
,
788 .ndo_stop
= batadv_interface_release
,
789 .ndo_get_stats
= batadv_interface_stats
,
790 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
791 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
792 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
793 .ndo_change_mtu
= batadv_interface_change_mtu
,
794 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
795 .ndo_start_xmit
= batadv_interface_tx
,
796 .ndo_validate_addr
= eth_validate_addr
,
797 .ndo_add_slave
= batadv_softif_slave_add
,
798 .ndo_del_slave
= batadv_softif_slave_del
,
802 * batadv_softif_free - Deconstructor of batadv_soft_interface
803 * @dev: Device to cleanup and remove
805 static void batadv_softif_free(struct net_device
*dev
)
807 batadv_debugfs_del_meshif(dev
);
808 batadv_mesh_free(dev
);
810 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
811 * their tasks. Wait for them all to be finished before freeing the
812 * netdev and its private data (bat_priv)
820 * batadv_softif_init_early - early stage initialization of soft interface
821 * @dev: registered network device to modify
823 static void batadv_softif_init_early(struct net_device
*dev
)
825 struct batadv_priv
*priv
= netdev_priv(dev
);
829 dev
->netdev_ops
= &batadv_netdev_ops
;
830 dev
->destructor
= batadv_softif_free
;
831 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
832 dev
->tx_queue_len
= 0;
834 /* can't call min_mtu, because the needed variables
835 * have not been initialized yet
837 dev
->mtu
= ETH_DATA_LEN
;
838 /* reserve more space in the skbuff for our header */
839 dev
->hard_header_len
= batadv_max_header_len();
841 /* generate random address */
842 eth_hw_addr_random(dev
);
844 SET_ETHTOOL_OPS(dev
, &batadv_ethtool_ops
);
846 memset(priv
, 0, sizeof(*priv
));
849 struct net_device
*batadv_softif_create(const char *name
)
851 struct net_device
*soft_iface
;
854 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
855 batadv_softif_init_early
);
859 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
861 ret
= register_netdevice(soft_iface
);
863 pr_err("Unable to register the batman interface '%s': %i\n",
865 free_netdev(soft_iface
);
873 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
874 * @soft_iface: the to-be-removed batman-adv interface
876 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
878 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
880 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
884 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
885 * @soft_iface: the to-be-removed batman-adv interface
886 * @head: list pointer
888 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
889 struct list_head
*head
)
891 struct batadv_hard_iface
*hard_iface
;
893 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
894 if (hard_iface
->soft_iface
== soft_iface
)
895 batadv_hardif_disable_interface(hard_iface
,
896 BATADV_IF_CLEANUP_KEEP
);
899 batadv_sysfs_del_meshif(soft_iface
);
900 unregister_netdevice_queue(soft_iface
, head
);
903 int batadv_softif_is_valid(const struct net_device
*net_dev
)
905 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
911 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
913 .priv_size
= sizeof(struct batadv_priv
),
914 .setup
= batadv_softif_init_early
,
915 .dellink
= batadv_softif_destroy_netlink
,
919 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
922 cmd
->advertising
= 0;
923 ethtool_cmd_speed_set(cmd
, SPEED_10
);
924 cmd
->duplex
= DUPLEX_FULL
;
926 cmd
->phy_address
= 0;
927 cmd
->transceiver
= XCVR_INTERNAL
;
928 cmd
->autoneg
= AUTONEG_DISABLE
;
935 static void batadv_get_drvinfo(struct net_device
*dev
,
936 struct ethtool_drvinfo
*info
)
938 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
939 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
940 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
941 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
944 static u32
batadv_get_msglevel(struct net_device
*dev
)
949 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
953 static u32
batadv_get_link(struct net_device
*dev
)
958 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
959 * Declare each description string in struct.name[] to get fixed sized buffer
960 * and compile time checking for strings longer than ETH_GSTRING_LEN.
962 static const struct {
963 const char name
[ETH_GSTRING_LEN
];
964 } batadv_counters_strings
[] = {
981 { "frag_fwd_bytes" },
984 { "tt_response_tx" },
985 { "tt_response_rx" },
986 { "tt_roam_adv_tx" },
987 { "tt_roam_adv_rx" },
988 #ifdef CONFIG_BATMAN_ADV_DAT
993 { "dat_cached_reply_tx" },
995 #ifdef CONFIG_BATMAN_ADV_NC
999 { "nc_recode_bytes" },
1002 { "nc_decode_bytes" },
1003 { "nc_decode_failed" },
1008 static void batadv_get_strings(struct net_device
*dev
, uint32_t stringset
,
1011 if (stringset
== ETH_SS_STATS
)
1012 memcpy(data
, batadv_counters_strings
,
1013 sizeof(batadv_counters_strings
));
1016 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1017 struct ethtool_stats
*stats
,
1020 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1023 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1024 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1027 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1029 if (stringset
== ETH_SS_STATS
)
1030 return BATADV_CNT_NUM
;