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 u8 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 u8 stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
191 static const u8 ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
193 enum batadv_dhcp_recipient dhcp_rcp
= BATADV_DHCP_NO
;
194 u8
*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
;
205 int network_offset
= ETH_HLEN
;
207 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
210 soft_iface
->trans_start
= jiffies
;
211 vid
= batadv_get_vid(skb
, 0);
212 ethhdr
= eth_hdr(skb
);
214 switch (ntohs(ethhdr
->h_proto
)) {
216 vhdr
= vlan_eth_hdr(skb
);
218 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
) {
219 network_offset
+= VLAN_HLEN
;
228 skb_set_network_header(skb
, network_offset
);
230 if (batadv_bla_tx(bat_priv
, skb
, vid
))
233 /* skb->data might have been reallocated by batadv_bla_tx() */
234 ethhdr
= eth_hdr(skb
);
236 /* Register the client MAC in the transtable */
237 if (!is_multicast_ether_addr(ethhdr
->h_source
)) {
238 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
245 /* don't accept stp packets. STP does not help in meshes.
246 * better use the bridge loop avoidance ...
248 * The same goes for ECTP sent at least by some Cisco Switches,
249 * it might confuse the mesh when used with bridge loop avoidance.
251 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
254 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
257 gw_mode
= atomic_read(&bat_priv
->gw_mode
);
258 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
259 /* if gw mode is off, broadcast every packet */
260 if (gw_mode
== BATADV_GW_MODE_OFF
) {
265 dhcp_rcp
= batadv_gw_dhcp_recipient_get(skb
, &header_len
,
267 /* skb->data may have been modified by
268 * batadv_gw_dhcp_recipient_get()
270 ethhdr
= eth_hdr(skb
);
271 /* if gw_mode is on, broadcast any non-DHCP message.
272 * All the DHCP packets are going to be sent as unicast
274 if (dhcp_rcp
== BATADV_DHCP_NO
) {
279 if (dhcp_rcp
== BATADV_DHCP_TO_CLIENT
)
281 else if ((gw_mode
== BATADV_GW_MODE_SERVER
) &&
282 (dhcp_rcp
== BATADV_DHCP_TO_SERVER
))
283 /* gateways should not forward any DHCP message if
284 * directed to a DHCP server
289 if (do_bcast
&& !is_broadcast_ether_addr(ethhdr
->h_dest
)) {
290 forw_mode
= batadv_mcast_forw_mode(bat_priv
, skb
,
292 if (forw_mode
== BATADV_FORW_NONE
)
295 if (forw_mode
== BATADV_FORW_SINGLE
)
300 batadv_skb_set_priority(skb
, 0);
302 /* ethernet packet should be broadcasted */
304 primary_if
= batadv_primary_if_get_selected(bat_priv
);
308 /* in case of ARP request, we do not immediately broadcasti the
309 * packet, instead we first wait for DAT to try to retrieve the
312 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
313 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
315 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
318 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
319 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
320 bcast_packet
->ttl
= BATADV_TTL
;
322 /* batman packet type: broadcast */
323 bcast_packet
->packet_type
= BATADV_BCAST
;
324 bcast_packet
->reserved
= 0;
326 /* hw address of first interface is the orig mac because only
327 * this mac is known throughout the mesh
329 ether_addr_copy(bcast_packet
->orig
,
330 primary_if
->net_dev
->dev_addr
);
332 /* set broadcast sequence number */
333 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
334 bcast_packet
->seqno
= htonl(seqno
);
336 batadv_add_bcast_packet_to_list(bat_priv
, skb
, brd_delay
);
338 /* a copy is stored in the bcast list, therefore removing
345 /* DHCP packets going to a server will use the GW feature */
346 if (dhcp_rcp
== BATADV_DHCP_TO_SERVER
) {
347 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
350 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
351 } else if (mcast_single_orig
) {
352 ret
= batadv_send_skb_unicast(bat_priv
, skb
,
354 mcast_single_orig
, vid
);
356 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
,
360 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
362 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, dst_hint
,
365 if (ret
== NET_XMIT_DROP
)
369 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
370 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
376 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
379 batadv_hardif_free_ref(primary_if
);
383 void batadv_interface_rx(struct net_device
*soft_iface
,
384 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
385 int hdr_size
, struct batadv_orig_node
*orig_node
)
387 struct batadv_bcast_packet
*batadv_bcast_packet
;
388 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
389 __be16 ethertype
= htons(ETH_P_BATMAN
);
390 struct vlan_ethhdr
*vhdr
;
391 struct ethhdr
*ethhdr
;
395 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
396 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
398 /* check if enough space is available for pulling, and pull */
399 if (!pskb_may_pull(skb
, hdr_size
))
402 skb_pull_rcsum(skb
, hdr_size
);
403 skb_reset_mac_header(skb
);
405 /* clean the netfilter state now that the batman-adv header has been
410 vid
= batadv_get_vid(skb
, 0);
411 ethhdr
= eth_hdr(skb
);
413 switch (ntohs(ethhdr
->h_proto
)) {
415 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
417 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
425 /* skb->dev & skb->pkt_type are set here */
426 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
428 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
430 /* should not be necessary anymore as we use skb_pull_rcsum()
431 * TODO: please verify this and remove this TODO
432 * -- Dec 21st 2009, Simon Wunderlich
435 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
437 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
438 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
439 skb
->len
+ ETH_HLEN
);
441 soft_iface
->last_rx
= jiffies
;
443 /* Let the bridge loop avoidance check the packet. If will
444 * not handle it, we can safely push it up.
446 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
450 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
451 ethhdr
->h_source
, vid
);
453 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
454 /* set the mark on broadcast packets if AP isolation is ON and
455 * the packet is coming from an "isolated" client
457 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
458 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
460 /* save bits in skb->mark not covered by the mask and
461 * apply the mark on the rest
463 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
464 skb
->mark
|= bat_priv
->isolation_mark
;
466 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
467 ethhdr
->h_dest
, vid
)) {
481 * batadv_softif_vlan_free_ref - decrease the vlan object refcounter and
483 * @vlan: the vlan object to release
485 void batadv_softif_vlan_free_ref(struct batadv_softif_vlan
*vlan
)
490 if (atomic_dec_and_test(&vlan
->refcount
)) {
491 spin_lock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
492 hlist_del_rcu(&vlan
->list
);
493 spin_unlock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
495 kfree_rcu(vlan
, rcu
);
500 * batadv_softif_vlan_get - get the vlan object for a specific vid
501 * @bat_priv: the bat priv with all the soft interface information
502 * @vid: the identifier of the vlan object to retrieve
504 * Return: the private data of the vlan matching the vid passed as argument or
505 * NULL otherwise. The refcounter of the returned object is incremented by 1.
507 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
510 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
513 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
514 if (vlan_tmp
->vid
!= vid
)
517 if (!atomic_inc_not_zero(&vlan_tmp
->refcount
))
529 * batadv_create_vlan - allocate the needed resources for a new vlan
530 * @bat_priv: the bat priv with all the soft interface information
531 * @vid: the VLAN identifier
533 * Return: 0 on success, a negative error otherwise.
535 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
537 struct batadv_softif_vlan
*vlan
;
540 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
542 batadv_softif_vlan_free_ref(vlan
);
546 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
550 vlan
->bat_priv
= bat_priv
;
552 atomic_set(&vlan
->refcount
, 1);
554 atomic_set(&vlan
->ap_isolation
, 0);
556 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
562 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
563 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
564 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
566 /* add a new TT local entry. This one will be marked with the NOPURGE
569 batadv_tt_local_add(bat_priv
->soft_iface
,
570 bat_priv
->soft_iface
->dev_addr
, vid
,
571 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
577 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
578 * @bat_priv: the bat priv with all the soft interface information
579 * @vlan: the object to remove
581 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
582 struct batadv_softif_vlan
*vlan
)
584 /* explicitly remove the associated TT local entry because it is marked
585 * with the NOPURGE flag
587 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
588 vlan
->vid
, "vlan interface destroyed", false);
590 batadv_sysfs_del_vlan(bat_priv
, vlan
);
591 batadv_softif_vlan_free_ref(vlan
);
595 * batadv_interface_add_vid - ndo_add_vid API implementation
596 * @dev: the netdev of the mesh interface
597 * @proto: protocol of the the vlan id
598 * @vid: identifier of the new vlan
600 * Set up all the internal structures for handling the new vlan on top of the
603 * Return: 0 on success or a negative error code in case of failure.
605 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
608 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
609 struct batadv_softif_vlan
*vlan
;
612 /* only 802.1Q vlans are supported.
613 * batman-adv does not know how to handle other types
615 if (proto
!= htons(ETH_P_8021Q
))
618 vid
|= BATADV_VLAN_HAS_TAG
;
620 /* if a new vlan is getting created and it already exists, it means that
621 * it was not deleted yet. batadv_softif_vlan_get() increases the
622 * refcount in order to revive the object.
624 * if it does not exist then create it.
626 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
628 return batadv_softif_create_vlan(bat_priv
, vid
);
630 /* recreate the sysfs object if it was already destroyed (and it should
631 * be since we received a kill_vid() for this vlan
634 ret
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
636 batadv_softif_vlan_free_ref(vlan
);
641 /* add a new TT local entry. This one will be marked with the NOPURGE
642 * flag. This must be added again, even if the vlan object already
643 * exists, because the entry was deleted by kill_vid()
645 batadv_tt_local_add(bat_priv
->soft_iface
,
646 bat_priv
->soft_iface
->dev_addr
, vid
,
647 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
653 * batadv_interface_kill_vid - ndo_kill_vid API implementation
654 * @dev: the netdev of the mesh interface
655 * @proto: protocol of the the vlan id
656 * @vid: identifier of the deleted vlan
658 * Destroy all the internal structures used to handle the vlan identified by vid
659 * on top of the mesh interface
661 * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
662 * or -ENOENT if the specified vlan id wasn't registered.
664 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
667 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
668 struct batadv_softif_vlan
*vlan
;
670 /* only 802.1Q vlans are supported. batman-adv does not know how to
673 if (proto
!= htons(ETH_P_8021Q
))
676 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
680 batadv_softif_destroy_vlan(bat_priv
, vlan
);
682 /* finally free the vlan object */
683 batadv_softif_vlan_free_ref(vlan
);
688 /* batman-adv network devices have devices nesting below it and are a special
689 * "super class" of normal network devices; split their locks off into a
690 * separate class since they always nest.
692 static struct lock_class_key batadv_netdev_xmit_lock_key
;
693 static struct lock_class_key batadv_netdev_addr_lock_key
;
696 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
697 * @dev: device which owns the tx queue
698 * @txq: tx queue to modify
699 * @_unused: always NULL
701 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
702 struct netdev_queue
*txq
,
705 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
709 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
710 * @dev: network device to modify
712 static void batadv_set_lockdep_class(struct net_device
*dev
)
714 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
715 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
719 * batadv_softif_destroy_finish - cleans up the remains of a softif
720 * @work: work queue item
722 * Free the parts of the soft interface which can not be removed under
723 * rtnl lock (to prevent deadlock situations).
725 static void batadv_softif_destroy_finish(struct work_struct
*work
)
727 struct batadv_softif_vlan
*vlan
;
728 struct batadv_priv
*bat_priv
;
729 struct net_device
*soft_iface
;
731 bat_priv
= container_of(work
, struct batadv_priv
,
733 soft_iface
= bat_priv
->soft_iface
;
735 /* destroy the "untagged" VLAN */
736 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
738 batadv_softif_destroy_vlan(bat_priv
, vlan
);
739 batadv_softif_vlan_free_ref(vlan
);
742 batadv_sysfs_del_meshif(soft_iface
);
743 unregister_netdev(soft_iface
);
747 * batadv_softif_init_late - late stage initialization of soft interface
748 * @dev: registered network device to modify
750 * Return: error code on failures
752 static int batadv_softif_init_late(struct net_device
*dev
)
754 struct batadv_priv
*bat_priv
;
757 size_t cnt_len
= sizeof(u64
) * BATADV_CNT_NUM
;
759 batadv_set_lockdep_class(dev
);
761 bat_priv
= netdev_priv(dev
);
762 bat_priv
->soft_iface
= dev
;
763 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
765 /* batadv_interface_stats() needs to be available as soon as
766 * register_netdevice() has been called
768 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(u64
));
769 if (!bat_priv
->bat_counters
)
772 atomic_set(&bat_priv
->aggregated_ogms
, 1);
773 atomic_set(&bat_priv
->bonding
, 0);
774 #ifdef CONFIG_BATMAN_ADV_BLA
775 atomic_set(&bat_priv
->bridge_loop_avoidance
, 1);
777 #ifdef CONFIG_BATMAN_ADV_DAT
778 atomic_set(&bat_priv
->distributed_arp_table
, 1);
780 #ifdef CONFIG_BATMAN_ADV_MCAST
781 bat_priv
->mcast
.flags
= BATADV_NO_FLAGS
;
782 atomic_set(&bat_priv
->multicast_mode
, 1);
783 atomic_set(&bat_priv
->mcast
.num_disabled
, 0);
784 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
785 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
786 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
788 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
789 atomic_set(&bat_priv
->gw_sel_class
, 20);
790 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
791 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
792 atomic_set(&bat_priv
->orig_interval
, 1000);
793 atomic_set(&bat_priv
->hop_penalty
, 30);
794 #ifdef CONFIG_BATMAN_ADV_DEBUG
795 atomic_set(&bat_priv
->log_level
, 0);
797 atomic_set(&bat_priv
->fragmentation
, 1);
798 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
799 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
800 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
802 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
803 atomic_set(&bat_priv
->bcast_seqno
, 1);
804 atomic_set(&bat_priv
->tt
.vn
, 0);
805 atomic_set(&bat_priv
->tt
.local_changes
, 0);
806 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
807 #ifdef CONFIG_BATMAN_ADV_BLA
808 atomic_set(&bat_priv
->bla
.num_requests
, 0);
810 bat_priv
->tt
.last_changeset
= NULL
;
811 bat_priv
->tt
.last_changeset_len
= 0;
812 bat_priv
->isolation_mark
= 0;
813 bat_priv
->isolation_mark_mask
= 0;
815 /* randomize initial seqno to avoid collision */
816 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
817 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
819 bat_priv
->primary_if
= NULL
;
820 bat_priv
->num_ifaces
= 0;
822 batadv_nc_init_bat_priv(bat_priv
);
824 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
826 goto free_bat_counters
;
828 ret
= batadv_debugfs_add_meshif(dev
);
830 goto free_bat_counters
;
832 ret
= batadv_mesh_init(dev
);
839 batadv_debugfs_del_meshif(dev
);
841 free_percpu(bat_priv
->bat_counters
);
842 bat_priv
->bat_counters
= NULL
;
848 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
849 * @dev: batadv_soft_interface used as master interface
850 * @slave_dev: net_device which should become the slave interface
852 * Return: 0 if successful or error otherwise.
854 static int batadv_softif_slave_add(struct net_device
*dev
,
855 struct net_device
*slave_dev
)
857 struct batadv_hard_iface
*hard_iface
;
860 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
861 if (!hard_iface
|| hard_iface
->soft_iface
)
864 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
868 batadv_hardif_free_ref(hard_iface
);
873 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
874 * @dev: batadv_soft_interface used as master interface
875 * @slave_dev: net_device which should be removed from the master interface
877 * Return: 0 if successful or error otherwise.
879 static int batadv_softif_slave_del(struct net_device
*dev
,
880 struct net_device
*slave_dev
)
882 struct batadv_hard_iface
*hard_iface
;
885 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
887 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
890 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
895 batadv_hardif_free_ref(hard_iface
);
899 static const struct net_device_ops batadv_netdev_ops
= {
900 .ndo_init
= batadv_softif_init_late
,
901 .ndo_open
= batadv_interface_open
,
902 .ndo_stop
= batadv_interface_release
,
903 .ndo_get_stats
= batadv_interface_stats
,
904 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
905 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
906 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
907 .ndo_change_mtu
= batadv_interface_change_mtu
,
908 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
909 .ndo_start_xmit
= batadv_interface_tx
,
910 .ndo_validate_addr
= eth_validate_addr
,
911 .ndo_add_slave
= batadv_softif_slave_add
,
912 .ndo_del_slave
= batadv_softif_slave_del
,
916 * batadv_softif_free - Deconstructor of batadv_soft_interface
917 * @dev: Device to cleanup and remove
919 static void batadv_softif_free(struct net_device
*dev
)
921 batadv_debugfs_del_meshif(dev
);
922 batadv_mesh_free(dev
);
924 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
925 * their tasks. Wait for them all to be finished before freeing the
926 * netdev and its private data (bat_priv)
934 * batadv_softif_init_early - early stage initialization of soft interface
935 * @dev: registered network device to modify
937 static void batadv_softif_init_early(struct net_device
*dev
)
939 struct batadv_priv
*priv
= netdev_priv(dev
);
943 dev
->netdev_ops
= &batadv_netdev_ops
;
944 dev
->destructor
= batadv_softif_free
;
945 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
946 dev
->priv_flags
|= IFF_NO_QUEUE
;
948 /* can't call min_mtu, because the needed variables
949 * have not been initialized yet
951 dev
->mtu
= ETH_DATA_LEN
;
953 /* generate random address */
954 eth_hw_addr_random(dev
);
956 dev
->ethtool_ops
= &batadv_ethtool_ops
;
958 memset(priv
, 0, sizeof(*priv
));
961 struct net_device
*batadv_softif_create(const char *name
)
963 struct net_device
*soft_iface
;
966 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
967 NET_NAME_UNKNOWN
, batadv_softif_init_early
);
971 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
973 ret
= register_netdevice(soft_iface
);
975 pr_err("Unable to register the batman interface '%s': %i\n",
977 free_netdev(soft_iface
);
985 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
986 * @soft_iface: the to-be-removed batman-adv interface
988 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
990 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
992 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
996 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
997 * @soft_iface: the to-be-removed batman-adv interface
998 * @head: list pointer
1000 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
1001 struct list_head
*head
)
1003 struct batadv_hard_iface
*hard_iface
;
1005 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
1006 if (hard_iface
->soft_iface
== soft_iface
)
1007 batadv_hardif_disable_interface(hard_iface
,
1008 BATADV_IF_CLEANUP_KEEP
);
1011 batadv_sysfs_del_meshif(soft_iface
);
1012 unregister_netdevice_queue(soft_iface
, head
);
1015 int batadv_softif_is_valid(const struct net_device
*net_dev
)
1017 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
1023 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
1025 .priv_size
= sizeof(struct batadv_priv
),
1026 .setup
= batadv_softif_init_early
,
1027 .dellink
= batadv_softif_destroy_netlink
,
1031 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1034 cmd
->advertising
= 0;
1035 ethtool_cmd_speed_set(cmd
, SPEED_10
);
1036 cmd
->duplex
= DUPLEX_FULL
;
1037 cmd
->port
= PORT_TP
;
1038 cmd
->phy_address
= 0;
1039 cmd
->transceiver
= XCVR_INTERNAL
;
1040 cmd
->autoneg
= AUTONEG_DISABLE
;
1047 static void batadv_get_drvinfo(struct net_device
*dev
,
1048 struct ethtool_drvinfo
*info
)
1050 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
1051 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
1052 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
1053 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
1056 static u32
batadv_get_msglevel(struct net_device
*dev
)
1061 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
1065 static u32
batadv_get_link(struct net_device
*dev
)
1070 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1071 * Declare each description string in struct.name[] to get fixed sized buffer
1072 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1074 static const struct {
1075 const char name
[ETH_GSTRING_LEN
];
1076 } batadv_counters_strings
[] = {
1083 { "forward_bytes" },
1085 { "mgmt_tx_bytes" },
1087 { "mgmt_rx_bytes" },
1089 { "frag_tx_bytes" },
1091 { "frag_rx_bytes" },
1093 { "frag_fwd_bytes" },
1094 { "tt_request_tx" },
1095 { "tt_request_rx" },
1096 { "tt_response_tx" },
1097 { "tt_response_rx" },
1098 { "tt_roam_adv_tx" },
1099 { "tt_roam_adv_rx" },
1100 #ifdef CONFIG_BATMAN_ADV_DAT
1105 { "dat_cached_reply_tx" },
1107 #ifdef CONFIG_BATMAN_ADV_NC
1109 { "nc_code_bytes" },
1111 { "nc_recode_bytes" },
1114 { "nc_decode_bytes" },
1115 { "nc_decode_failed" },
1120 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
)
1122 if (stringset
== ETH_SS_STATS
)
1123 memcpy(data
, batadv_counters_strings
,
1124 sizeof(batadv_counters_strings
));
1127 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1128 struct ethtool_stats
*stats
, u64
*data
)
1130 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1133 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1134 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1137 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1139 if (stringset
== ETH_SS_STATS
)
1140 return BATADV_CNT_NUM
;