1 /* Copyright (C) 2007-2016 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/kref.h>
34 #include <linux/list.h>
35 #include <linux/lockdep.h>
36 #include <linux/netdevice.h>
37 #include <linux/percpu.h>
38 #include <linux/printk.h>
39 #include <linux/random.h>
40 #include <linux/rculist.h>
41 #include <linux/rcupdate.h>
42 #include <linux/skbuff.h>
43 #include <linux/slab.h>
44 #include <linux/socket.h>
45 #include <linux/spinlock.h>
46 #include <linux/stddef.h>
47 #include <linux/string.h>
48 #include <linux/types.h>
49 #include <linux/workqueue.h>
51 #include "bridge_loop_avoidance.h"
53 #include "distributed-arp-table.h"
54 #include "gateway_client.h"
55 #include "gateway_common.h"
56 #include "hard-interface.h"
57 #include "multicast.h"
58 #include "network-coding.h"
62 #include "translation-table.h"
64 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
);
65 static void batadv_get_drvinfo(struct net_device
*dev
,
66 struct ethtool_drvinfo
*info
);
67 static u32
batadv_get_msglevel(struct net_device
*dev
);
68 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
);
69 static u32
batadv_get_link(struct net_device
*dev
);
70 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
);
71 static void batadv_get_ethtool_stats(struct net_device
*dev
,
72 struct ethtool_stats
*stats
, u64
*data
);
73 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
);
75 static const struct ethtool_ops batadv_ethtool_ops
= {
76 .get_settings
= batadv_get_settings
,
77 .get_drvinfo
= batadv_get_drvinfo
,
78 .get_msglevel
= batadv_get_msglevel
,
79 .set_msglevel
= batadv_set_msglevel
,
80 .get_link
= batadv_get_link
,
81 .get_strings
= batadv_get_strings
,
82 .get_ethtool_stats
= batadv_get_ethtool_stats
,
83 .get_sset_count
= batadv_get_sset_count
,
86 int batadv_skb_head_push(struct sk_buff
*skb
, unsigned int len
)
90 /* TODO: We must check if we can release all references to non-payload
91 * data using skb_header_release in our skbs to allow skb_cow_header to
92 * work optimally. This means that those skbs are not allowed to read
93 * or write any data which is before the current position of skb->data
94 * after that call and thus allow other skbs with the same data buffer
95 * to write freely in that area.
97 result
= skb_cow_head(skb
, len
);
105 static int batadv_interface_open(struct net_device
*dev
)
107 netif_start_queue(dev
);
111 static int batadv_interface_release(struct net_device
*dev
)
113 netif_stop_queue(dev
);
117 static struct net_device_stats
*batadv_interface_stats(struct net_device
*dev
)
119 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
120 struct net_device_stats
*stats
= &bat_priv
->stats
;
122 stats
->tx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX
);
123 stats
->tx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_BYTES
);
124 stats
->tx_dropped
= batadv_sum_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
125 stats
->rx_packets
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX
);
126 stats
->rx_bytes
= batadv_sum_counter(bat_priv
, BATADV_CNT_RX_BYTES
);
130 static int batadv_interface_set_mac_addr(struct net_device
*dev
, void *p
)
132 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
133 struct batadv_softif_vlan
*vlan
;
134 struct sockaddr
*addr
= p
;
135 u8 old_addr
[ETH_ALEN
];
137 if (!is_valid_ether_addr(addr
->sa_data
))
138 return -EADDRNOTAVAIL
;
140 ether_addr_copy(old_addr
, dev
->dev_addr
);
141 ether_addr_copy(dev
->dev_addr
, addr
->sa_data
);
143 /* only modify transtable if it has been initialized before */
144 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
148 hlist_for_each_entry_rcu(vlan
, &bat_priv
->softif_vlan_list
, list
) {
149 batadv_tt_local_remove(bat_priv
, old_addr
, vlan
->vid
,
150 "mac address changed", false);
151 batadv_tt_local_add(dev
, addr
->sa_data
, vlan
->vid
,
152 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
159 static int batadv_interface_change_mtu(struct net_device
*dev
, int new_mtu
)
162 if ((new_mtu
< 68) || (new_mtu
> batadv_hardif_min_mtu(dev
)))
171 * batadv_interface_set_rx_mode - set the rx mode of a device
172 * @dev: registered network device to modify
174 * We do not actually need to set any rx filters for the virtual batman
175 * soft interface. However a dummy handler enables a user to set static
176 * multicast listeners for instance.
178 static void batadv_interface_set_rx_mode(struct net_device
*dev
)
182 static int batadv_interface_tx(struct sk_buff
*skb
,
183 struct net_device
*soft_iface
)
185 struct ethhdr
*ethhdr
;
186 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
187 struct batadv_hard_iface
*primary_if
= NULL
;
188 struct batadv_bcast_packet
*bcast_packet
;
189 __be16 ethertype
= htons(ETH_P_BATMAN
);
190 static const u8 stp_addr
[ETH_ALEN
] = {0x01, 0x80, 0xC2, 0x00,
192 static const u8 ectp_addr
[ETH_ALEN
] = {0xCF, 0x00, 0x00, 0x00,
194 enum batadv_dhcp_recipient dhcp_rcp
= BATADV_DHCP_NO
;
195 u8
*dst_hint
= NULL
, chaddr
[ETH_ALEN
];
196 struct vlan_ethhdr
*vhdr
;
197 unsigned int header_len
= 0;
198 int data_len
= skb
->len
, ret
;
199 unsigned long brd_delay
= 1;
200 bool do_bcast
= false, client_added
;
204 enum batadv_forw_mode forw_mode
;
205 struct batadv_orig_node
*mcast_single_orig
= NULL
;
206 int network_offset
= ETH_HLEN
;
208 if (atomic_read(&bat_priv
->mesh_state
) != BATADV_MESH_ACTIVE
)
211 netif_trans_update(soft_iface
);
212 vid
= batadv_get_vid(skb
, 0);
213 ethhdr
= eth_hdr(skb
);
215 switch (ntohs(ethhdr
->h_proto
)) {
217 vhdr
= vlan_eth_hdr(skb
);
219 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
) {
220 network_offset
+= VLAN_HLEN
;
229 skb_set_network_header(skb
, network_offset
);
231 if (batadv_bla_tx(bat_priv
, skb
, vid
))
234 /* skb->data might have been reallocated by batadv_bla_tx() */
235 ethhdr
= eth_hdr(skb
);
237 /* Register the client MAC in the transtable */
238 if (!is_multicast_ether_addr(ethhdr
->h_source
)) {
239 client_added
= batadv_tt_local_add(soft_iface
, ethhdr
->h_source
,
246 /* don't accept stp packets. STP does not help in meshes.
247 * better use the bridge loop avoidance ...
249 * The same goes for ECTP sent at least by some Cisco Switches,
250 * it might confuse the mesh when used with bridge loop avoidance.
252 if (batadv_compare_eth(ethhdr
->h_dest
, stp_addr
))
255 if (batadv_compare_eth(ethhdr
->h_dest
, ectp_addr
))
258 gw_mode
= atomic_read(&bat_priv
->gw_mode
);
259 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
260 /* if gw mode is off, broadcast every packet */
261 if (gw_mode
== BATADV_GW_MODE_OFF
) {
266 dhcp_rcp
= batadv_gw_dhcp_recipient_get(skb
, &header_len
,
268 /* skb->data may have been modified by
269 * batadv_gw_dhcp_recipient_get()
271 ethhdr
= eth_hdr(skb
);
272 /* if gw_mode is on, broadcast any non-DHCP message.
273 * All the DHCP packets are going to be sent as unicast
275 if (dhcp_rcp
== BATADV_DHCP_NO
) {
280 if (dhcp_rcp
== BATADV_DHCP_TO_CLIENT
)
282 else if ((gw_mode
== BATADV_GW_MODE_SERVER
) &&
283 (dhcp_rcp
== BATADV_DHCP_TO_SERVER
))
284 /* gateways should not forward any DHCP message if
285 * directed to a DHCP server
290 if (do_bcast
&& !is_broadcast_ether_addr(ethhdr
->h_dest
)) {
291 forw_mode
= batadv_mcast_forw_mode(bat_priv
, skb
,
293 if (forw_mode
== BATADV_FORW_NONE
)
296 if (forw_mode
== BATADV_FORW_SINGLE
)
301 batadv_skb_set_priority(skb
, 0);
303 /* ethernet packet should be broadcasted */
305 primary_if
= batadv_primary_if_get_selected(bat_priv
);
309 /* in case of ARP request, we do not immediately broadcasti the
310 * packet, instead we first wait for DAT to try to retrieve the
313 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
, skb
))
314 brd_delay
= msecs_to_jiffies(ARP_REQ_DELAY
);
316 if (batadv_skb_head_push(skb
, sizeof(*bcast_packet
)) < 0)
319 bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
320 bcast_packet
->version
= BATADV_COMPAT_VERSION
;
321 bcast_packet
->ttl
= BATADV_TTL
;
323 /* batman packet type: broadcast */
324 bcast_packet
->packet_type
= BATADV_BCAST
;
325 bcast_packet
->reserved
= 0;
327 /* hw address of first interface is the orig mac because only
328 * this mac is known throughout the mesh
330 ether_addr_copy(bcast_packet
->orig
,
331 primary_if
->net_dev
->dev_addr
);
333 /* set broadcast sequence number */
334 seqno
= atomic_inc_return(&bat_priv
->bcast_seqno
);
335 bcast_packet
->seqno
= htonl(seqno
);
337 batadv_add_bcast_packet_to_list(bat_priv
, skb
, brd_delay
);
339 /* a copy is stored in the bcast list, therefore removing
346 /* DHCP packets going to a server will use the GW feature */
347 if (dhcp_rcp
== BATADV_DHCP_TO_SERVER
) {
348 ret
= batadv_gw_out_of_range(bat_priv
, skb
);
351 ret
= batadv_send_skb_via_gw(bat_priv
, skb
, vid
);
352 } else if (mcast_single_orig
) {
353 ret
= batadv_send_skb_unicast(bat_priv
, skb
,
355 mcast_single_orig
, vid
);
357 if (batadv_dat_snoop_outgoing_arp_request(bat_priv
,
361 batadv_dat_snoop_outgoing_arp_reply(bat_priv
, skb
);
363 ret
= batadv_send_skb_via_tt(bat_priv
, skb
, dst_hint
,
366 if (ret
== NET_XMIT_DROP
)
370 batadv_inc_counter(bat_priv
, BATADV_CNT_TX
);
371 batadv_add_counter(bat_priv
, BATADV_CNT_TX_BYTES
, data_len
);
377 batadv_inc_counter(bat_priv
, BATADV_CNT_TX_DROPPED
);
380 batadv_hardif_put(primary_if
);
385 * batadv_interface_rx - receive ethernet frame on local batman-adv interface
386 * @soft_iface: local interface which will receive the ethernet frame
387 * @skb: ethernet frame for @soft_iface
388 * @recv_if: interface on which the batman-adv packet was received
389 * @hdr_size: size of already parsed batman-adv header
390 * @orig_node: originator from which the batman-adv packet was sent
392 * Sends a ethernet frame to the receive path of the local @soft_iface.
393 * skb->data has still point to the batman-adv header with the size @hdr_size.
394 * The caller has to have parsed this header already and made sure that at least
395 * @hdr_size bytes are still available for pull in @skb.
397 * The packet may still get dropped. This can happen when the encapsulated
398 * ethernet frame is invalid or contains again an batman-adv packet. Also
399 * unicast packets will be dropped directly when it was sent between two
402 void batadv_interface_rx(struct net_device
*soft_iface
,
403 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
404 int hdr_size
, struct batadv_orig_node
*orig_node
)
406 struct batadv_bcast_packet
*batadv_bcast_packet
;
407 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
408 __be16 ethertype
= htons(ETH_P_BATMAN
);
409 struct vlan_ethhdr
*vhdr
;
410 struct ethhdr
*ethhdr
;
414 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
415 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
417 /* check if enough space is available for pulling, and pull */
418 if (!pskb_may_pull(skb
, hdr_size
))
421 skb_pull_rcsum(skb
, hdr_size
);
422 skb_reset_mac_header(skb
);
424 /* clean the netfilter state now that the batman-adv header has been
429 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
432 vid
= batadv_get_vid(skb
, 0);
433 ethhdr
= eth_hdr(skb
);
435 switch (ntohs(ethhdr
->h_proto
)) {
437 if (!pskb_may_pull(skb
, VLAN_ETH_HLEN
))
440 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
442 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
450 /* skb->dev & skb->pkt_type are set here */
451 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
453 /* should not be necessary anymore as we use skb_pull_rcsum()
454 * TODO: please verify this and remove this TODO
455 * -- Dec 21st 2009, Simon Wunderlich
458 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
460 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
461 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
462 skb
->len
+ ETH_HLEN
);
464 soft_iface
->last_rx
= jiffies
;
466 /* Let the bridge loop avoidance check the packet. If will
467 * not handle it, we can safely push it up.
469 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
473 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
474 ethhdr
->h_source
, vid
);
476 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
477 /* set the mark on broadcast packets if AP isolation is ON and
478 * the packet is coming from an "isolated" client
480 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
481 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
483 /* save bits in skb->mark not covered by the mask and
484 * apply the mark on the rest
486 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
487 skb
->mark
|= bat_priv
->isolation_mark
;
489 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
490 ethhdr
->h_dest
, vid
)) {
504 * batadv_softif_vlan_release - release vlan from lists and queue for free after
506 * @ref: kref pointer of the vlan object
508 static void batadv_softif_vlan_release(struct kref
*ref
)
510 struct batadv_softif_vlan
*vlan
;
512 vlan
= container_of(ref
, struct batadv_softif_vlan
, refcount
);
514 spin_lock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
515 hlist_del_rcu(&vlan
->list
);
516 spin_unlock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
518 kfree_rcu(vlan
, rcu
);
522 * batadv_softif_vlan_put - decrease the vlan object refcounter and
523 * possibly release it
524 * @vlan: the vlan object to release
526 void batadv_softif_vlan_put(struct batadv_softif_vlan
*vlan
)
531 kref_put(&vlan
->refcount
, batadv_softif_vlan_release
);
535 * batadv_softif_vlan_get - get the vlan object for a specific vid
536 * @bat_priv: the bat priv with all the soft interface information
537 * @vid: the identifier of the vlan object to retrieve
539 * Return: the private data of the vlan matching the vid passed as argument or
540 * NULL otherwise. The refcounter of the returned object is incremented by 1.
542 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
545 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
548 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
549 if (vlan_tmp
->vid
!= vid
)
552 if (!kref_get_unless_zero(&vlan_tmp
->refcount
))
564 * batadv_softif_create_vlan - allocate the needed resources for a new vlan
565 * @bat_priv: the bat priv with all the soft interface information
566 * @vid: the VLAN identifier
568 * Return: 0 on success, a negative error otherwise.
570 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
572 struct batadv_softif_vlan
*vlan
;
575 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
577 batadv_softif_vlan_put(vlan
);
581 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
585 vlan
->bat_priv
= bat_priv
;
587 kref_init(&vlan
->refcount
);
589 atomic_set(&vlan
->ap_isolation
, 0);
591 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
597 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
598 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
599 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
601 /* add a new TT local entry. This one will be marked with the NOPURGE
604 batadv_tt_local_add(bat_priv
->soft_iface
,
605 bat_priv
->soft_iface
->dev_addr
, vid
,
606 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
612 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
613 * @bat_priv: the bat priv with all the soft interface information
614 * @vlan: the object to remove
616 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
617 struct batadv_softif_vlan
*vlan
)
619 /* explicitly remove the associated TT local entry because it is marked
620 * with the NOPURGE flag
622 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
623 vlan
->vid
, "vlan interface destroyed", false);
625 batadv_sysfs_del_vlan(bat_priv
, vlan
);
626 batadv_softif_vlan_put(vlan
);
630 * batadv_interface_add_vid - ndo_add_vid API implementation
631 * @dev: the netdev of the mesh interface
632 * @proto: protocol of the the vlan id
633 * @vid: identifier of the new vlan
635 * Set up all the internal structures for handling the new vlan on top of the
638 * Return: 0 on success or a negative error code in case of failure.
640 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
643 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
644 struct batadv_softif_vlan
*vlan
;
647 /* only 802.1Q vlans are supported.
648 * batman-adv does not know how to handle other types
650 if (proto
!= htons(ETH_P_8021Q
))
653 vid
|= BATADV_VLAN_HAS_TAG
;
655 /* if a new vlan is getting created and it already exists, it means that
656 * it was not deleted yet. batadv_softif_vlan_get() increases the
657 * refcount in order to revive the object.
659 * if it does not exist then create it.
661 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
663 return batadv_softif_create_vlan(bat_priv
, vid
);
665 /* recreate the sysfs object if it was already destroyed (and it should
666 * be since we received a kill_vid() for this vlan
669 ret
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
671 batadv_softif_vlan_put(vlan
);
676 /* add a new TT local entry. This one will be marked with the NOPURGE
677 * flag. This must be added again, even if the vlan object already
678 * exists, because the entry was deleted by kill_vid()
680 batadv_tt_local_add(bat_priv
->soft_iface
,
681 bat_priv
->soft_iface
->dev_addr
, vid
,
682 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
688 * batadv_interface_kill_vid - ndo_kill_vid API implementation
689 * @dev: the netdev of the mesh interface
690 * @proto: protocol of the the vlan id
691 * @vid: identifier of the deleted vlan
693 * Destroy all the internal structures used to handle the vlan identified by vid
694 * on top of the mesh interface
696 * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
697 * or -ENOENT if the specified vlan id wasn't registered.
699 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
702 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
703 struct batadv_softif_vlan
*vlan
;
705 /* only 802.1Q vlans are supported. batman-adv does not know how to
708 if (proto
!= htons(ETH_P_8021Q
))
711 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
715 batadv_softif_destroy_vlan(bat_priv
, vlan
);
717 /* finally free the vlan object */
718 batadv_softif_vlan_put(vlan
);
723 /* batman-adv network devices have devices nesting below it and are a special
724 * "super class" of normal network devices; split their locks off into a
725 * separate class since they always nest.
727 static struct lock_class_key batadv_netdev_xmit_lock_key
;
728 static struct lock_class_key batadv_netdev_addr_lock_key
;
731 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
732 * @dev: device which owns the tx queue
733 * @txq: tx queue to modify
734 * @_unused: always NULL
736 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
737 struct netdev_queue
*txq
,
740 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
744 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
745 * @dev: network device to modify
747 static void batadv_set_lockdep_class(struct net_device
*dev
)
749 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
750 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
754 * batadv_softif_destroy_finish - cleans up the remains of a softif
755 * @work: work queue item
757 * Free the parts of the soft interface which can not be removed under
758 * rtnl lock (to prevent deadlock situations).
760 static void batadv_softif_destroy_finish(struct work_struct
*work
)
762 struct batadv_softif_vlan
*vlan
;
763 struct batadv_priv
*bat_priv
;
764 struct net_device
*soft_iface
;
766 bat_priv
= container_of(work
, struct batadv_priv
,
768 soft_iface
= bat_priv
->soft_iface
;
770 /* destroy the "untagged" VLAN */
771 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
773 batadv_softif_destroy_vlan(bat_priv
, vlan
);
774 batadv_softif_vlan_put(vlan
);
777 batadv_sysfs_del_meshif(soft_iface
);
778 unregister_netdev(soft_iface
);
782 * batadv_softif_init_late - late stage initialization of soft interface
783 * @dev: registered network device to modify
785 * Return: error code on failures
787 static int batadv_softif_init_late(struct net_device
*dev
)
789 struct batadv_priv
*bat_priv
;
792 size_t cnt_len
= sizeof(u64
) * BATADV_CNT_NUM
;
794 batadv_set_lockdep_class(dev
);
796 bat_priv
= netdev_priv(dev
);
797 bat_priv
->soft_iface
= dev
;
798 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
800 /* batadv_interface_stats() needs to be available as soon as
801 * register_netdevice() has been called
803 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(u64
));
804 if (!bat_priv
->bat_counters
)
807 atomic_set(&bat_priv
->aggregated_ogms
, 1);
808 atomic_set(&bat_priv
->bonding
, 0);
809 #ifdef CONFIG_BATMAN_ADV_BLA
810 atomic_set(&bat_priv
->bridge_loop_avoidance
, 1);
812 #ifdef CONFIG_BATMAN_ADV_DAT
813 atomic_set(&bat_priv
->distributed_arp_table
, 1);
815 #ifdef CONFIG_BATMAN_ADV_MCAST
816 bat_priv
->mcast
.flags
= BATADV_NO_FLAGS
;
817 atomic_set(&bat_priv
->multicast_mode
, 1);
818 atomic_set(&bat_priv
->mcast
.num_disabled
, 0);
819 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
820 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
821 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
823 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
824 atomic_set(&bat_priv
->gw_sel_class
, 20);
825 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
826 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
827 atomic_set(&bat_priv
->orig_interval
, 1000);
828 atomic_set(&bat_priv
->hop_penalty
, 30);
829 #ifdef CONFIG_BATMAN_ADV_DEBUG
830 atomic_set(&bat_priv
->log_level
, 0);
832 atomic_set(&bat_priv
->fragmentation
, 1);
833 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
834 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
835 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
837 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
838 atomic_set(&bat_priv
->bcast_seqno
, 1);
839 atomic_set(&bat_priv
->tt
.vn
, 0);
840 atomic_set(&bat_priv
->tt
.local_changes
, 0);
841 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
842 #ifdef CONFIG_BATMAN_ADV_BLA
843 atomic_set(&bat_priv
->bla
.num_requests
, 0);
845 bat_priv
->tt
.last_changeset
= NULL
;
846 bat_priv
->tt
.last_changeset_len
= 0;
847 bat_priv
->isolation_mark
= 0;
848 bat_priv
->isolation_mark_mask
= 0;
850 /* randomize initial seqno to avoid collision */
851 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
852 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
854 bat_priv
->primary_if
= NULL
;
855 bat_priv
->num_ifaces
= 0;
857 batadv_nc_init_bat_priv(bat_priv
);
859 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
861 goto free_bat_counters
;
863 ret
= batadv_debugfs_add_meshif(dev
);
865 goto free_bat_counters
;
867 ret
= batadv_mesh_init(dev
);
874 batadv_debugfs_del_meshif(dev
);
876 free_percpu(bat_priv
->bat_counters
);
877 bat_priv
->bat_counters
= NULL
;
883 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
884 * @dev: batadv_soft_interface used as master interface
885 * @slave_dev: net_device which should become the slave interface
887 * Return: 0 if successful or error otherwise.
889 static int batadv_softif_slave_add(struct net_device
*dev
,
890 struct net_device
*slave_dev
)
892 struct batadv_hard_iface
*hard_iface
;
895 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
896 if (!hard_iface
|| hard_iface
->soft_iface
)
899 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
903 batadv_hardif_put(hard_iface
);
908 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
909 * @dev: batadv_soft_interface used as master interface
910 * @slave_dev: net_device which should be removed from the master interface
912 * Return: 0 if successful or error otherwise.
914 static int batadv_softif_slave_del(struct net_device
*dev
,
915 struct net_device
*slave_dev
)
917 struct batadv_hard_iface
*hard_iface
;
920 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
922 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
925 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
930 batadv_hardif_put(hard_iface
);
934 static const struct net_device_ops batadv_netdev_ops
= {
935 .ndo_init
= batadv_softif_init_late
,
936 .ndo_open
= batadv_interface_open
,
937 .ndo_stop
= batadv_interface_release
,
938 .ndo_get_stats
= batadv_interface_stats
,
939 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
940 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
941 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
942 .ndo_change_mtu
= batadv_interface_change_mtu
,
943 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
944 .ndo_start_xmit
= batadv_interface_tx
,
945 .ndo_validate_addr
= eth_validate_addr
,
946 .ndo_add_slave
= batadv_softif_slave_add
,
947 .ndo_del_slave
= batadv_softif_slave_del
,
951 * batadv_softif_free - Deconstructor of batadv_soft_interface
952 * @dev: Device to cleanup and remove
954 static void batadv_softif_free(struct net_device
*dev
)
956 batadv_debugfs_del_meshif(dev
);
957 batadv_mesh_free(dev
);
959 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
960 * their tasks. Wait for them all to be finished before freeing the
961 * netdev and its private data (bat_priv)
969 * batadv_softif_init_early - early stage initialization of soft interface
970 * @dev: registered network device to modify
972 static void batadv_softif_init_early(struct net_device
*dev
)
974 struct batadv_priv
*priv
= netdev_priv(dev
);
978 dev
->netdev_ops
= &batadv_netdev_ops
;
979 dev
->destructor
= batadv_softif_free
;
980 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
981 dev
->priv_flags
|= IFF_NO_QUEUE
;
983 /* can't call min_mtu, because the needed variables
984 * have not been initialized yet
986 dev
->mtu
= ETH_DATA_LEN
;
988 /* generate random address */
989 eth_hw_addr_random(dev
);
991 dev
->ethtool_ops
= &batadv_ethtool_ops
;
993 memset(priv
, 0, sizeof(*priv
));
996 struct net_device
*batadv_softif_create(const char *name
)
998 struct net_device
*soft_iface
;
1001 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
1002 NET_NAME_UNKNOWN
, batadv_softif_init_early
);
1006 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
1008 ret
= register_netdevice(soft_iface
);
1010 pr_err("Unable to register the batman interface '%s': %i\n",
1012 free_netdev(soft_iface
);
1020 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
1021 * @soft_iface: the to-be-removed batman-adv interface
1023 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
1025 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
1027 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
1031 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
1032 * @soft_iface: the to-be-removed batman-adv interface
1033 * @head: list pointer
1035 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
1036 struct list_head
*head
)
1038 struct batadv_hard_iface
*hard_iface
;
1040 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
1041 if (hard_iface
->soft_iface
== soft_iface
)
1042 batadv_hardif_disable_interface(hard_iface
,
1043 BATADV_IF_CLEANUP_KEEP
);
1046 batadv_sysfs_del_meshif(soft_iface
);
1047 unregister_netdevice_queue(soft_iface
, head
);
1050 int batadv_softif_is_valid(const struct net_device
*net_dev
)
1052 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
1058 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
1060 .priv_size
= sizeof(struct batadv_priv
),
1061 .setup
= batadv_softif_init_early
,
1062 .dellink
= batadv_softif_destroy_netlink
,
1066 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1069 cmd
->advertising
= 0;
1070 ethtool_cmd_speed_set(cmd
, SPEED_10
);
1071 cmd
->duplex
= DUPLEX_FULL
;
1072 cmd
->port
= PORT_TP
;
1073 cmd
->phy_address
= 0;
1074 cmd
->transceiver
= XCVR_INTERNAL
;
1075 cmd
->autoneg
= AUTONEG_DISABLE
;
1082 static void batadv_get_drvinfo(struct net_device
*dev
,
1083 struct ethtool_drvinfo
*info
)
1085 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
1086 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
1087 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
1088 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
1091 static u32
batadv_get_msglevel(struct net_device
*dev
)
1096 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
1100 static u32
batadv_get_link(struct net_device
*dev
)
1105 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1106 * Declare each description string in struct.name[] to get fixed sized buffer
1107 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1109 static const struct {
1110 const char name
[ETH_GSTRING_LEN
];
1111 } batadv_counters_strings
[] = {
1118 { "forward_bytes" },
1120 { "mgmt_tx_bytes" },
1122 { "mgmt_rx_bytes" },
1124 { "frag_tx_bytes" },
1126 { "frag_rx_bytes" },
1128 { "frag_fwd_bytes" },
1129 { "tt_request_tx" },
1130 { "tt_request_rx" },
1131 { "tt_response_tx" },
1132 { "tt_response_rx" },
1133 { "tt_roam_adv_tx" },
1134 { "tt_roam_adv_rx" },
1135 #ifdef CONFIG_BATMAN_ADV_DAT
1140 { "dat_cached_reply_tx" },
1142 #ifdef CONFIG_BATMAN_ADV_NC
1144 { "nc_code_bytes" },
1146 { "nc_recode_bytes" },
1149 { "nc_decode_bytes" },
1150 { "nc_decode_failed" },
1155 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
)
1157 if (stringset
== ETH_SS_STATS
)
1158 memcpy(data
, batadv_counters_strings
,
1159 sizeof(batadv_counters_strings
));
1162 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1163 struct ethtool_stats
*stats
, u64
*data
)
1165 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1168 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1169 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1172 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1174 if (stringset
== ETH_SS_STATS
)
1175 return BATADV_CNT_NUM
;