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
->header
.version
= BATADV_COMPAT_VERSION
;
268 bcast_packet
->header
.ttl
= BATADV_TTL
;
270 /* batman packet type: broadcast */
271 bcast_packet
->header
.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_header
*batadv_header
= (struct batadv_header
*)skb
->data
;
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 is_bcast
= (batadv_header
->packet_type
== BATADV_BCAST
);
341 /* check if enough space is available for pulling, and pull */
342 if (!pskb_may_pull(skb
, hdr_size
))
345 skb_pull_rcsum(skb
, hdr_size
);
346 skb_reset_mac_header(skb
);
348 vid
= batadv_get_vid(skb
, hdr_size
);
349 ethhdr
= eth_hdr(skb
);
351 switch (ntohs(ethhdr
->h_proto
)) {
353 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
355 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
363 /* skb->dev & skb->pkt_type are set here */
364 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
366 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
368 /* should not be necessary anymore as we use skb_pull_rcsum()
369 * TODO: please verify this and remove this TODO
370 * -- Dec 21st 2009, Simon Wunderlich
373 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
375 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
376 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
377 skb
->len
+ ETH_HLEN
);
379 soft_iface
->last_rx
= jiffies
;
381 /* Let the bridge loop avoidance check the packet. If will
382 * not handle it, we can safely push it up.
384 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
388 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
389 ethhdr
->h_source
, vid
);
391 if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
, ethhdr
->h_dest
,
405 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
407 * @softif_vlan: the vlan object to release
409 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan
*softif_vlan
)
411 if (atomic_dec_and_test(&softif_vlan
->refcount
))
412 kfree_rcu(softif_vlan
, rcu
);
416 * batadv_softif_vlan_get - get the vlan object for a specific vid
417 * @bat_priv: the bat priv with all the soft interface information
418 * @vid: the identifier of the vlan object to retrieve
420 * Returns the private data of the vlan matching the vid passed as argument or
421 * NULL otherwise. The refcounter of the returned object is incremented by 1.
423 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
426 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
429 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
430 if (vlan_tmp
->vid
!= vid
)
433 if (!atomic_inc_not_zero(&vlan_tmp
->refcount
))
445 * batadv_create_vlan - allocate the needed resources for a new vlan
446 * @bat_priv: the bat priv with all the soft interface information
447 * @vid: the VLAN identifier
449 * Returns 0 on success, a negative error otherwise.
451 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
453 struct batadv_softif_vlan
*vlan
;
456 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
458 batadv_softif_vlan_free_ref(vlan
);
462 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
467 atomic_set(&vlan
->refcount
, 1);
469 atomic_set(&vlan
->ap_isolation
, 0);
471 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
477 /* add a new TT local entry. This one will be marked with the NOPURGE
480 batadv_tt_local_add(bat_priv
->soft_iface
,
481 bat_priv
->soft_iface
->dev_addr
, vid
,
482 BATADV_NULL_IFINDEX
);
484 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
485 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
486 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
492 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
493 * @bat_priv: the bat priv with all the soft interface information
494 * @vlan: the object to remove
496 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
497 struct batadv_softif_vlan
*vlan
)
499 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
500 hlist_del_rcu(&vlan
->list
);
501 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
503 batadv_sysfs_del_vlan(bat_priv
, vlan
);
505 /* explicitly remove the associated TT local entry because it is marked
506 * with the NOPURGE flag
508 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
509 vlan
->vid
, "vlan interface destroyed", false);
511 batadv_softif_vlan_free_ref(vlan
);
515 * batadv_interface_add_vid - ndo_add_vid API implementation
516 * @dev: the netdev of the mesh interface
517 * @vid: identifier of the new vlan
519 * Set up all the internal structures for handling the new vlan on top of the
522 * Returns 0 on success or a negative error code in case of failure.
524 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
527 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
529 /* only 802.1Q vlans are supported.
530 * batman-adv does not know how to handle other types
532 if (proto
!= htons(ETH_P_8021Q
))
535 vid
|= BATADV_VLAN_HAS_TAG
;
537 return batadv_softif_create_vlan(bat_priv
, vid
);
541 * batadv_interface_kill_vid - ndo_kill_vid API implementation
542 * @dev: the netdev of the mesh interface
543 * @vid: identifier of the deleted vlan
545 * Destroy all the internal structures used to handle the vlan identified by vid
546 * on top of the mesh interface
548 * Returns 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
549 * or -ENOENT if the specified vlan id wasn't registered.
551 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
554 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
555 struct batadv_softif_vlan
*vlan
;
557 /* only 802.1Q vlans are supported. batman-adv does not know how to
560 if (proto
!= htons(ETH_P_8021Q
))
563 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
567 batadv_softif_destroy_vlan(bat_priv
, vlan
);
569 /* finally free the vlan object */
570 batadv_softif_vlan_free_ref(vlan
);
575 /* batman-adv network devices have devices nesting below it and are a special
576 * "super class" of normal network devices; split their locks off into a
577 * separate class since they always nest.
579 static struct lock_class_key batadv_netdev_xmit_lock_key
;
580 static struct lock_class_key batadv_netdev_addr_lock_key
;
583 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
584 * @dev: device which owns the tx queue
585 * @txq: tx queue to modify
586 * @_unused: always NULL
588 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
589 struct netdev_queue
*txq
,
592 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
596 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
597 * @dev: network device to modify
599 static void batadv_set_lockdep_class(struct net_device
*dev
)
601 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
602 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
606 * batadv_softif_destroy_finish - cleans up the remains of a softif
607 * @work: work queue item
609 * Free the parts of the soft interface which can not be removed under
610 * rtnl lock (to prevent deadlock situations).
612 static void batadv_softif_destroy_finish(struct work_struct
*work
)
614 struct batadv_softif_vlan
*vlan
;
615 struct batadv_priv
*bat_priv
;
616 struct net_device
*soft_iface
;
618 bat_priv
= container_of(work
, struct batadv_priv
,
620 soft_iface
= bat_priv
->soft_iface
;
622 /* destroy the "untagged" VLAN */
623 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
625 batadv_softif_destroy_vlan(bat_priv
, vlan
);
626 batadv_softif_vlan_free_ref(vlan
);
629 batadv_sysfs_del_meshif(soft_iface
);
632 unregister_netdevice(soft_iface
);
637 * batadv_softif_init_late - late stage initialization of soft interface
638 * @dev: registered network device to modify
640 * Returns error code on failures
642 static int batadv_softif_init_late(struct net_device
*dev
)
644 struct batadv_priv
*bat_priv
;
645 uint32_t random_seqno
;
647 size_t cnt_len
= sizeof(uint64_t) * BATADV_CNT_NUM
;
649 batadv_set_lockdep_class(dev
);
651 bat_priv
= netdev_priv(dev
);
652 bat_priv
->soft_iface
= dev
;
653 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
655 /* batadv_interface_stats() needs to be available as soon as
656 * register_netdevice() has been called
658 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(uint64_t));
659 if (!bat_priv
->bat_counters
)
662 atomic_set(&bat_priv
->aggregated_ogms
, 1);
663 atomic_set(&bat_priv
->bonding
, 0);
664 #ifdef CONFIG_BATMAN_ADV_BLA
665 atomic_set(&bat_priv
->bridge_loop_avoidance
, 0);
667 #ifdef CONFIG_BATMAN_ADV_DAT
668 atomic_set(&bat_priv
->distributed_arp_table
, 1);
670 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
671 atomic_set(&bat_priv
->gw_sel_class
, 20);
672 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
673 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
674 atomic_set(&bat_priv
->orig_interval
, 1000);
675 atomic_set(&bat_priv
->hop_penalty
, 30);
676 #ifdef CONFIG_BATMAN_ADV_DEBUG
677 atomic_set(&bat_priv
->log_level
, 0);
679 atomic_set(&bat_priv
->fragmentation
, 1);
680 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
681 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
682 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
684 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
685 atomic_set(&bat_priv
->bcast_seqno
, 1);
686 atomic_set(&bat_priv
->tt
.vn
, 0);
687 atomic_set(&bat_priv
->tt
.local_changes
, 0);
688 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
689 #ifdef CONFIG_BATMAN_ADV_BLA
690 atomic_set(&bat_priv
->bla
.num_requests
, 0);
692 bat_priv
->tt
.last_changeset
= NULL
;
693 bat_priv
->tt
.last_changeset_len
= 0;
695 /* randomize initial seqno to avoid collision */
696 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
697 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
699 bat_priv
->primary_if
= NULL
;
700 bat_priv
->num_ifaces
= 0;
702 batadv_nc_init_bat_priv(bat_priv
);
704 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
706 goto free_bat_counters
;
708 ret
= batadv_debugfs_add_meshif(dev
);
710 goto free_bat_counters
;
712 ret
= batadv_mesh_init(dev
);
719 batadv_debugfs_del_meshif(dev
);
721 free_percpu(bat_priv
->bat_counters
);
722 bat_priv
->bat_counters
= NULL
;
728 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
729 * @dev: batadv_soft_interface used as master interface
730 * @slave_dev: net_device which should become the slave interface
732 * Return 0 if successful or error otherwise.
734 static int batadv_softif_slave_add(struct net_device
*dev
,
735 struct net_device
*slave_dev
)
737 struct batadv_hard_iface
*hard_iface
;
740 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
741 if (!hard_iface
|| hard_iface
->soft_iface
!= NULL
)
744 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
748 batadv_hardif_free_ref(hard_iface
);
753 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
754 * @dev: batadv_soft_interface used as master interface
755 * @slave_dev: net_device which should be removed from the master interface
757 * Return 0 if successful or error otherwise.
759 static int batadv_softif_slave_del(struct net_device
*dev
,
760 struct net_device
*slave_dev
)
762 struct batadv_hard_iface
*hard_iface
;
765 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
767 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
770 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
775 batadv_hardif_free_ref(hard_iface
);
779 static const struct net_device_ops batadv_netdev_ops
= {
780 .ndo_init
= batadv_softif_init_late
,
781 .ndo_open
= batadv_interface_open
,
782 .ndo_stop
= batadv_interface_release
,
783 .ndo_get_stats
= batadv_interface_stats
,
784 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
785 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
786 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
787 .ndo_change_mtu
= batadv_interface_change_mtu
,
788 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
789 .ndo_start_xmit
= batadv_interface_tx
,
790 .ndo_validate_addr
= eth_validate_addr
,
791 .ndo_add_slave
= batadv_softif_slave_add
,
792 .ndo_del_slave
= batadv_softif_slave_del
,
796 * batadv_softif_free - Deconstructor of batadv_soft_interface
797 * @dev: Device to cleanup and remove
799 static void batadv_softif_free(struct net_device
*dev
)
801 batadv_debugfs_del_meshif(dev
);
802 batadv_mesh_free(dev
);
804 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
805 * their tasks. Wait for them all to be finished before freeing the
806 * netdev and its private data (bat_priv)
814 * batadv_softif_init_early - early stage initialization of soft interface
815 * @dev: registered network device to modify
817 static void batadv_softif_init_early(struct net_device
*dev
)
819 struct batadv_priv
*priv
= netdev_priv(dev
);
823 dev
->netdev_ops
= &batadv_netdev_ops
;
824 dev
->destructor
= batadv_softif_free
;
825 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
826 dev
->tx_queue_len
= 0;
828 /* can't call min_mtu, because the needed variables
829 * have not been initialized yet
831 dev
->mtu
= ETH_DATA_LEN
;
832 /* reserve more space in the skbuff for our header */
833 dev
->hard_header_len
= batadv_max_header_len();
835 /* generate random address */
836 eth_hw_addr_random(dev
);
838 SET_ETHTOOL_OPS(dev
, &batadv_ethtool_ops
);
840 memset(priv
, 0, sizeof(*priv
));
843 struct net_device
*batadv_softif_create(const char *name
)
845 struct net_device
*soft_iface
;
848 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
849 batadv_softif_init_early
);
853 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
855 ret
= register_netdevice(soft_iface
);
857 pr_err("Unable to register the batman interface '%s': %i\n",
859 free_netdev(soft_iface
);
867 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
868 * @soft_iface: the to-be-removed batman-adv interface
870 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
872 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
874 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
878 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
879 * @soft_iface: the to-be-removed batman-adv interface
880 * @head: list pointer
882 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
883 struct list_head
*head
)
885 struct batadv_hard_iface
*hard_iface
;
887 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
888 if (hard_iface
->soft_iface
== soft_iface
)
889 batadv_hardif_disable_interface(hard_iface
,
890 BATADV_IF_CLEANUP_KEEP
);
893 batadv_sysfs_del_meshif(soft_iface
);
894 unregister_netdevice_queue(soft_iface
, head
);
897 int batadv_softif_is_valid(const struct net_device
*net_dev
)
899 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
905 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
907 .priv_size
= sizeof(struct batadv_priv
),
908 .setup
= batadv_softif_init_early
,
909 .dellink
= batadv_softif_destroy_netlink
,
913 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
916 cmd
->advertising
= 0;
917 ethtool_cmd_speed_set(cmd
, SPEED_10
);
918 cmd
->duplex
= DUPLEX_FULL
;
920 cmd
->phy_address
= 0;
921 cmd
->transceiver
= XCVR_INTERNAL
;
922 cmd
->autoneg
= AUTONEG_DISABLE
;
929 static void batadv_get_drvinfo(struct net_device
*dev
,
930 struct ethtool_drvinfo
*info
)
932 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
933 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
934 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
935 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
938 static u32
batadv_get_msglevel(struct net_device
*dev
)
943 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
947 static u32
batadv_get_link(struct net_device
*dev
)
952 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
953 * Declare each description string in struct.name[] to get fixed sized buffer
954 * and compile time checking for strings longer than ETH_GSTRING_LEN.
956 static const struct {
957 const char name
[ETH_GSTRING_LEN
];
958 } batadv_counters_strings
[] = {
975 { "frag_fwd_bytes" },
978 { "tt_response_tx" },
979 { "tt_response_rx" },
980 { "tt_roam_adv_tx" },
981 { "tt_roam_adv_rx" },
982 #ifdef CONFIG_BATMAN_ADV_DAT
987 { "dat_cached_reply_tx" },
989 #ifdef CONFIG_BATMAN_ADV_NC
993 { "nc_recode_bytes" },
996 { "nc_decode_bytes" },
997 { "nc_decode_failed" },
1002 static void batadv_get_strings(struct net_device
*dev
, uint32_t stringset
,
1005 if (stringset
== ETH_SS_STATS
)
1006 memcpy(data
, batadv_counters_strings
,
1007 sizeof(batadv_counters_strings
));
1010 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1011 struct ethtool_stats
*stats
,
1014 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1017 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1018 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1021 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1023 if (stringset
== ETH_SS_STATS
)
1024 return BATADV_CNT_NUM
;