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 soft_iface
->trans_start
= jiffies
;
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
);
384 void batadv_interface_rx(struct net_device
*soft_iface
,
385 struct sk_buff
*skb
, struct batadv_hard_iface
*recv_if
,
386 int hdr_size
, struct batadv_orig_node
*orig_node
)
388 struct batadv_bcast_packet
*batadv_bcast_packet
;
389 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
390 __be16 ethertype
= htons(ETH_P_BATMAN
);
391 struct vlan_ethhdr
*vhdr
;
392 struct ethhdr
*ethhdr
;
396 batadv_bcast_packet
= (struct batadv_bcast_packet
*)skb
->data
;
397 is_bcast
= (batadv_bcast_packet
->packet_type
== BATADV_BCAST
);
399 /* check if enough space is available for pulling, and pull */
400 if (!pskb_may_pull(skb
, hdr_size
))
403 skb_pull_rcsum(skb
, hdr_size
);
404 skb_reset_mac_header(skb
);
406 /* clean the netfilter state now that the batman-adv header has been
411 if (unlikely(!pskb_may_pull(skb
, ETH_HLEN
)))
414 vid
= batadv_get_vid(skb
, 0);
415 ethhdr
= eth_hdr(skb
);
417 switch (ntohs(ethhdr
->h_proto
)) {
419 if (!pskb_may_pull(skb
, VLAN_ETH_HLEN
))
422 vhdr
= (struct vlan_ethhdr
*)skb
->data
;
424 if (vhdr
->h_vlan_encapsulated_proto
!= ethertype
)
432 /* skb->dev & skb->pkt_type are set here */
433 skb
->protocol
= eth_type_trans(skb
, soft_iface
);
435 /* should not be necessary anymore as we use skb_pull_rcsum()
436 * TODO: please verify this and remove this TODO
437 * -- Dec 21st 2009, Simon Wunderlich
440 /* skb->ip_summed = CHECKSUM_UNNECESSARY; */
442 batadv_inc_counter(bat_priv
, BATADV_CNT_RX
);
443 batadv_add_counter(bat_priv
, BATADV_CNT_RX_BYTES
,
444 skb
->len
+ ETH_HLEN
);
446 soft_iface
->last_rx
= jiffies
;
448 /* Let the bridge loop avoidance check the packet. If will
449 * not handle it, we can safely push it up.
451 if (batadv_bla_rx(bat_priv
, skb
, vid
, is_bcast
))
455 batadv_tt_add_temporary_global_entry(bat_priv
, orig_node
,
456 ethhdr
->h_source
, vid
);
458 if (is_multicast_ether_addr(ethhdr
->h_dest
)) {
459 /* set the mark on broadcast packets if AP isolation is ON and
460 * the packet is coming from an "isolated" client
462 if (batadv_vlan_ap_isola_get(bat_priv
, vid
) &&
463 batadv_tt_global_is_isolated(bat_priv
, ethhdr
->h_source
,
465 /* save bits in skb->mark not covered by the mask and
466 * apply the mark on the rest
468 skb
->mark
&= ~bat_priv
->isolation_mark_mask
;
469 skb
->mark
|= bat_priv
->isolation_mark
;
471 } else if (batadv_is_ap_isolated(bat_priv
, ethhdr
->h_source
,
472 ethhdr
->h_dest
, vid
)) {
486 * batadv_softif_vlan_release - release vlan from lists and queue for free after
488 * @ref: kref pointer of the vlan object
490 static void batadv_softif_vlan_release(struct kref
*ref
)
492 struct batadv_softif_vlan
*vlan
;
494 vlan
= container_of(ref
, struct batadv_softif_vlan
, refcount
);
496 spin_lock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
497 hlist_del_rcu(&vlan
->list
);
498 spin_unlock_bh(&vlan
->bat_priv
->softif_vlan_list_lock
);
500 kfree_rcu(vlan
, rcu
);
504 * batadv_softif_vlan_put - decrease the vlan object refcounter and
505 * possibly release it
506 * @vlan: the vlan object to release
508 void batadv_softif_vlan_put(struct batadv_softif_vlan
*vlan
)
513 kref_put(&vlan
->refcount
, batadv_softif_vlan_release
);
517 * batadv_softif_vlan_get - get the vlan object for a specific vid
518 * @bat_priv: the bat priv with all the soft interface information
519 * @vid: the identifier of the vlan object to retrieve
521 * Return: the private data of the vlan matching the vid passed as argument or
522 * NULL otherwise. The refcounter of the returned object is incremented by 1.
524 struct batadv_softif_vlan
*batadv_softif_vlan_get(struct batadv_priv
*bat_priv
,
527 struct batadv_softif_vlan
*vlan_tmp
, *vlan
= NULL
;
530 hlist_for_each_entry_rcu(vlan_tmp
, &bat_priv
->softif_vlan_list
, list
) {
531 if (vlan_tmp
->vid
!= vid
)
534 if (!kref_get_unless_zero(&vlan_tmp
->refcount
))
546 * batadv_create_vlan - allocate the needed resources for a new vlan
547 * @bat_priv: the bat priv with all the soft interface information
548 * @vid: the VLAN identifier
550 * Return: 0 on success, a negative error otherwise.
552 int batadv_softif_create_vlan(struct batadv_priv
*bat_priv
, unsigned short vid
)
554 struct batadv_softif_vlan
*vlan
;
557 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
559 batadv_softif_vlan_put(vlan
);
563 vlan
= kzalloc(sizeof(*vlan
), GFP_ATOMIC
);
567 vlan
->bat_priv
= bat_priv
;
569 kref_init(&vlan
->refcount
);
571 atomic_set(&vlan
->ap_isolation
, 0);
573 err
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
579 spin_lock_bh(&bat_priv
->softif_vlan_list_lock
);
580 hlist_add_head_rcu(&vlan
->list
, &bat_priv
->softif_vlan_list
);
581 spin_unlock_bh(&bat_priv
->softif_vlan_list_lock
);
583 /* add a new TT local entry. This one will be marked with the NOPURGE
586 batadv_tt_local_add(bat_priv
->soft_iface
,
587 bat_priv
->soft_iface
->dev_addr
, vid
,
588 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
594 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
595 * @bat_priv: the bat priv with all the soft interface information
596 * @vlan: the object to remove
598 static void batadv_softif_destroy_vlan(struct batadv_priv
*bat_priv
,
599 struct batadv_softif_vlan
*vlan
)
601 /* explicitly remove the associated TT local entry because it is marked
602 * with the NOPURGE flag
604 batadv_tt_local_remove(bat_priv
, bat_priv
->soft_iface
->dev_addr
,
605 vlan
->vid
, "vlan interface destroyed", false);
607 batadv_sysfs_del_vlan(bat_priv
, vlan
);
608 batadv_softif_vlan_put(vlan
);
612 * batadv_interface_add_vid - ndo_add_vid API implementation
613 * @dev: the netdev of the mesh interface
614 * @proto: protocol of the the vlan id
615 * @vid: identifier of the new vlan
617 * Set up all the internal structures for handling the new vlan on top of the
620 * Return: 0 on success or a negative error code in case of failure.
622 static int batadv_interface_add_vid(struct net_device
*dev
, __be16 proto
,
625 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
626 struct batadv_softif_vlan
*vlan
;
629 /* only 802.1Q vlans are supported.
630 * batman-adv does not know how to handle other types
632 if (proto
!= htons(ETH_P_8021Q
))
635 vid
|= BATADV_VLAN_HAS_TAG
;
637 /* if a new vlan is getting created and it already exists, it means that
638 * it was not deleted yet. batadv_softif_vlan_get() increases the
639 * refcount in order to revive the object.
641 * if it does not exist then create it.
643 vlan
= batadv_softif_vlan_get(bat_priv
, vid
);
645 return batadv_softif_create_vlan(bat_priv
, vid
);
647 /* recreate the sysfs object if it was already destroyed (and it should
648 * be since we received a kill_vid() for this vlan
651 ret
= batadv_sysfs_add_vlan(bat_priv
->soft_iface
, vlan
);
653 batadv_softif_vlan_put(vlan
);
658 /* add a new TT local entry. This one will be marked with the NOPURGE
659 * flag. This must be added again, even if the vlan object already
660 * exists, because the entry was deleted by kill_vid()
662 batadv_tt_local_add(bat_priv
->soft_iface
,
663 bat_priv
->soft_iface
->dev_addr
, vid
,
664 BATADV_NULL_IFINDEX
, BATADV_NO_MARK
);
670 * batadv_interface_kill_vid - ndo_kill_vid API implementation
671 * @dev: the netdev of the mesh interface
672 * @proto: protocol of the the vlan id
673 * @vid: identifier of the deleted vlan
675 * Destroy all the internal structures used to handle the vlan identified by vid
676 * on top of the mesh interface
678 * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
679 * or -ENOENT if the specified vlan id wasn't registered.
681 static int batadv_interface_kill_vid(struct net_device
*dev
, __be16 proto
,
684 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
685 struct batadv_softif_vlan
*vlan
;
687 /* only 802.1Q vlans are supported. batman-adv does not know how to
690 if (proto
!= htons(ETH_P_8021Q
))
693 vlan
= batadv_softif_vlan_get(bat_priv
, vid
| BATADV_VLAN_HAS_TAG
);
697 batadv_softif_destroy_vlan(bat_priv
, vlan
);
699 /* finally free the vlan object */
700 batadv_softif_vlan_put(vlan
);
705 /* batman-adv network devices have devices nesting below it and are a special
706 * "super class" of normal network devices; split their locks off into a
707 * separate class since they always nest.
709 static struct lock_class_key batadv_netdev_xmit_lock_key
;
710 static struct lock_class_key batadv_netdev_addr_lock_key
;
713 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
714 * @dev: device which owns the tx queue
715 * @txq: tx queue to modify
716 * @_unused: always NULL
718 static void batadv_set_lockdep_class_one(struct net_device
*dev
,
719 struct netdev_queue
*txq
,
722 lockdep_set_class(&txq
->_xmit_lock
, &batadv_netdev_xmit_lock_key
);
726 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
727 * @dev: network device to modify
729 static void batadv_set_lockdep_class(struct net_device
*dev
)
731 lockdep_set_class(&dev
->addr_list_lock
, &batadv_netdev_addr_lock_key
);
732 netdev_for_each_tx_queue(dev
, batadv_set_lockdep_class_one
, NULL
);
736 * batadv_softif_destroy_finish - cleans up the remains of a softif
737 * @work: work queue item
739 * Free the parts of the soft interface which can not be removed under
740 * rtnl lock (to prevent deadlock situations).
742 static void batadv_softif_destroy_finish(struct work_struct
*work
)
744 struct batadv_softif_vlan
*vlan
;
745 struct batadv_priv
*bat_priv
;
746 struct net_device
*soft_iface
;
748 bat_priv
= container_of(work
, struct batadv_priv
,
750 soft_iface
= bat_priv
->soft_iface
;
752 /* destroy the "untagged" VLAN */
753 vlan
= batadv_softif_vlan_get(bat_priv
, BATADV_NO_FLAGS
);
755 batadv_softif_destroy_vlan(bat_priv
, vlan
);
756 batadv_softif_vlan_put(vlan
);
759 batadv_sysfs_del_meshif(soft_iface
);
760 unregister_netdev(soft_iface
);
764 * batadv_softif_init_late - late stage initialization of soft interface
765 * @dev: registered network device to modify
767 * Return: error code on failures
769 static int batadv_softif_init_late(struct net_device
*dev
)
771 struct batadv_priv
*bat_priv
;
774 size_t cnt_len
= sizeof(u64
) * BATADV_CNT_NUM
;
776 batadv_set_lockdep_class(dev
);
778 bat_priv
= netdev_priv(dev
);
779 bat_priv
->soft_iface
= dev
;
780 INIT_WORK(&bat_priv
->cleanup_work
, batadv_softif_destroy_finish
);
782 /* batadv_interface_stats() needs to be available as soon as
783 * register_netdevice() has been called
785 bat_priv
->bat_counters
= __alloc_percpu(cnt_len
, __alignof__(u64
));
786 if (!bat_priv
->bat_counters
)
789 atomic_set(&bat_priv
->aggregated_ogms
, 1);
790 atomic_set(&bat_priv
->bonding
, 0);
791 #ifdef CONFIG_BATMAN_ADV_BLA
792 atomic_set(&bat_priv
->bridge_loop_avoidance
, 1);
794 #ifdef CONFIG_BATMAN_ADV_DAT
795 atomic_set(&bat_priv
->distributed_arp_table
, 1);
797 #ifdef CONFIG_BATMAN_ADV_MCAST
798 bat_priv
->mcast
.flags
= BATADV_NO_FLAGS
;
799 atomic_set(&bat_priv
->multicast_mode
, 1);
800 atomic_set(&bat_priv
->mcast
.num_disabled
, 0);
801 atomic_set(&bat_priv
->mcast
.num_want_all_unsnoopables
, 0);
802 atomic_set(&bat_priv
->mcast
.num_want_all_ipv4
, 0);
803 atomic_set(&bat_priv
->mcast
.num_want_all_ipv6
, 0);
805 atomic_set(&bat_priv
->gw_mode
, BATADV_GW_MODE_OFF
);
806 atomic_set(&bat_priv
->gw_sel_class
, 20);
807 atomic_set(&bat_priv
->gw
.bandwidth_down
, 100);
808 atomic_set(&bat_priv
->gw
.bandwidth_up
, 20);
809 atomic_set(&bat_priv
->orig_interval
, 1000);
810 atomic_set(&bat_priv
->hop_penalty
, 30);
811 #ifdef CONFIG_BATMAN_ADV_DEBUG
812 atomic_set(&bat_priv
->log_level
, 0);
814 atomic_set(&bat_priv
->fragmentation
, 1);
815 atomic_set(&bat_priv
->packet_size_max
, ETH_DATA_LEN
);
816 atomic_set(&bat_priv
->bcast_queue_left
, BATADV_BCAST_QUEUE_LEN
);
817 atomic_set(&bat_priv
->batman_queue_left
, BATADV_BATMAN_QUEUE_LEN
);
819 atomic_set(&bat_priv
->mesh_state
, BATADV_MESH_INACTIVE
);
820 atomic_set(&bat_priv
->bcast_seqno
, 1);
821 atomic_set(&bat_priv
->tt
.vn
, 0);
822 atomic_set(&bat_priv
->tt
.local_changes
, 0);
823 atomic_set(&bat_priv
->tt
.ogm_append_cnt
, 0);
824 #ifdef CONFIG_BATMAN_ADV_BLA
825 atomic_set(&bat_priv
->bla
.num_requests
, 0);
827 bat_priv
->tt
.last_changeset
= NULL
;
828 bat_priv
->tt
.last_changeset_len
= 0;
829 bat_priv
->isolation_mark
= 0;
830 bat_priv
->isolation_mark_mask
= 0;
832 /* randomize initial seqno to avoid collision */
833 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
834 atomic_set(&bat_priv
->frag_seqno
, random_seqno
);
836 bat_priv
->primary_if
= NULL
;
837 bat_priv
->num_ifaces
= 0;
839 batadv_nc_init_bat_priv(bat_priv
);
841 ret
= batadv_algo_select(bat_priv
, batadv_routing_algo
);
843 goto free_bat_counters
;
845 ret
= batadv_debugfs_add_meshif(dev
);
847 goto free_bat_counters
;
849 ret
= batadv_mesh_init(dev
);
856 batadv_debugfs_del_meshif(dev
);
858 free_percpu(bat_priv
->bat_counters
);
859 bat_priv
->bat_counters
= NULL
;
865 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
866 * @dev: batadv_soft_interface used as master interface
867 * @slave_dev: net_device which should become the slave interface
869 * Return: 0 if successful or error otherwise.
871 static int batadv_softif_slave_add(struct net_device
*dev
,
872 struct net_device
*slave_dev
)
874 struct batadv_hard_iface
*hard_iface
;
877 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
878 if (!hard_iface
|| hard_iface
->soft_iface
)
881 ret
= batadv_hardif_enable_interface(hard_iface
, dev
->name
);
885 batadv_hardif_put(hard_iface
);
890 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
891 * @dev: batadv_soft_interface used as master interface
892 * @slave_dev: net_device which should be removed from the master interface
894 * Return: 0 if successful or error otherwise.
896 static int batadv_softif_slave_del(struct net_device
*dev
,
897 struct net_device
*slave_dev
)
899 struct batadv_hard_iface
*hard_iface
;
902 hard_iface
= batadv_hardif_get_by_netdev(slave_dev
);
904 if (!hard_iface
|| hard_iface
->soft_iface
!= dev
)
907 batadv_hardif_disable_interface(hard_iface
, BATADV_IF_CLEANUP_KEEP
);
912 batadv_hardif_put(hard_iface
);
916 static const struct net_device_ops batadv_netdev_ops
= {
917 .ndo_init
= batadv_softif_init_late
,
918 .ndo_open
= batadv_interface_open
,
919 .ndo_stop
= batadv_interface_release
,
920 .ndo_get_stats
= batadv_interface_stats
,
921 .ndo_vlan_rx_add_vid
= batadv_interface_add_vid
,
922 .ndo_vlan_rx_kill_vid
= batadv_interface_kill_vid
,
923 .ndo_set_mac_address
= batadv_interface_set_mac_addr
,
924 .ndo_change_mtu
= batadv_interface_change_mtu
,
925 .ndo_set_rx_mode
= batadv_interface_set_rx_mode
,
926 .ndo_start_xmit
= batadv_interface_tx
,
927 .ndo_validate_addr
= eth_validate_addr
,
928 .ndo_add_slave
= batadv_softif_slave_add
,
929 .ndo_del_slave
= batadv_softif_slave_del
,
933 * batadv_softif_free - Deconstructor of batadv_soft_interface
934 * @dev: Device to cleanup and remove
936 static void batadv_softif_free(struct net_device
*dev
)
938 batadv_debugfs_del_meshif(dev
);
939 batadv_mesh_free(dev
);
941 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
942 * their tasks. Wait for them all to be finished before freeing the
943 * netdev and its private data (bat_priv)
951 * batadv_softif_init_early - early stage initialization of soft interface
952 * @dev: registered network device to modify
954 static void batadv_softif_init_early(struct net_device
*dev
)
956 struct batadv_priv
*priv
= netdev_priv(dev
);
960 dev
->netdev_ops
= &batadv_netdev_ops
;
961 dev
->destructor
= batadv_softif_free
;
962 dev
->features
|= NETIF_F_HW_VLAN_CTAG_FILTER
;
963 dev
->priv_flags
|= IFF_NO_QUEUE
;
965 /* can't call min_mtu, because the needed variables
966 * have not been initialized yet
968 dev
->mtu
= ETH_DATA_LEN
;
970 /* generate random address */
971 eth_hw_addr_random(dev
);
973 dev
->ethtool_ops
= &batadv_ethtool_ops
;
975 memset(priv
, 0, sizeof(*priv
));
978 struct net_device
*batadv_softif_create(const char *name
)
980 struct net_device
*soft_iface
;
983 soft_iface
= alloc_netdev(sizeof(struct batadv_priv
), name
,
984 NET_NAME_UNKNOWN
, batadv_softif_init_early
);
988 soft_iface
->rtnl_link_ops
= &batadv_link_ops
;
990 ret
= register_netdevice(soft_iface
);
992 pr_err("Unable to register the batman interface '%s': %i\n",
994 free_netdev(soft_iface
);
1002 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
1003 * @soft_iface: the to-be-removed batman-adv interface
1005 void batadv_softif_destroy_sysfs(struct net_device
*soft_iface
)
1007 struct batadv_priv
*bat_priv
= netdev_priv(soft_iface
);
1009 queue_work(batadv_event_workqueue
, &bat_priv
->cleanup_work
);
1013 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
1014 * @soft_iface: the to-be-removed batman-adv interface
1015 * @head: list pointer
1017 static void batadv_softif_destroy_netlink(struct net_device
*soft_iface
,
1018 struct list_head
*head
)
1020 struct batadv_hard_iface
*hard_iface
;
1022 list_for_each_entry(hard_iface
, &batadv_hardif_list
, list
) {
1023 if (hard_iface
->soft_iface
== soft_iface
)
1024 batadv_hardif_disable_interface(hard_iface
,
1025 BATADV_IF_CLEANUP_KEEP
);
1028 batadv_sysfs_del_meshif(soft_iface
);
1029 unregister_netdevice_queue(soft_iface
, head
);
1032 int batadv_softif_is_valid(const struct net_device
*net_dev
)
1034 if (net_dev
->netdev_ops
->ndo_start_xmit
== batadv_interface_tx
)
1040 struct rtnl_link_ops batadv_link_ops __read_mostly
= {
1042 .priv_size
= sizeof(struct batadv_priv
),
1043 .setup
= batadv_softif_init_early
,
1044 .dellink
= batadv_softif_destroy_netlink
,
1048 static int batadv_get_settings(struct net_device
*dev
, struct ethtool_cmd
*cmd
)
1051 cmd
->advertising
= 0;
1052 ethtool_cmd_speed_set(cmd
, SPEED_10
);
1053 cmd
->duplex
= DUPLEX_FULL
;
1054 cmd
->port
= PORT_TP
;
1055 cmd
->phy_address
= 0;
1056 cmd
->transceiver
= XCVR_INTERNAL
;
1057 cmd
->autoneg
= AUTONEG_DISABLE
;
1064 static void batadv_get_drvinfo(struct net_device
*dev
,
1065 struct ethtool_drvinfo
*info
)
1067 strlcpy(info
->driver
, "B.A.T.M.A.N. advanced", sizeof(info
->driver
));
1068 strlcpy(info
->version
, BATADV_SOURCE_VERSION
, sizeof(info
->version
));
1069 strlcpy(info
->fw_version
, "N/A", sizeof(info
->fw_version
));
1070 strlcpy(info
->bus_info
, "batman", sizeof(info
->bus_info
));
1073 static u32
batadv_get_msglevel(struct net_device
*dev
)
1078 static void batadv_set_msglevel(struct net_device
*dev
, u32 value
)
1082 static u32
batadv_get_link(struct net_device
*dev
)
1087 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1088 * Declare each description string in struct.name[] to get fixed sized buffer
1089 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1091 static const struct {
1092 const char name
[ETH_GSTRING_LEN
];
1093 } batadv_counters_strings
[] = {
1100 { "forward_bytes" },
1102 { "mgmt_tx_bytes" },
1104 { "mgmt_rx_bytes" },
1106 { "frag_tx_bytes" },
1108 { "frag_rx_bytes" },
1110 { "frag_fwd_bytes" },
1111 { "tt_request_tx" },
1112 { "tt_request_rx" },
1113 { "tt_response_tx" },
1114 { "tt_response_rx" },
1115 { "tt_roam_adv_tx" },
1116 { "tt_roam_adv_rx" },
1117 #ifdef CONFIG_BATMAN_ADV_DAT
1122 { "dat_cached_reply_tx" },
1124 #ifdef CONFIG_BATMAN_ADV_NC
1126 { "nc_code_bytes" },
1128 { "nc_recode_bytes" },
1131 { "nc_decode_bytes" },
1132 { "nc_decode_failed" },
1137 static void batadv_get_strings(struct net_device
*dev
, u32 stringset
, u8
*data
)
1139 if (stringset
== ETH_SS_STATS
)
1140 memcpy(data
, batadv_counters_strings
,
1141 sizeof(batadv_counters_strings
));
1144 static void batadv_get_ethtool_stats(struct net_device
*dev
,
1145 struct ethtool_stats
*stats
, u64
*data
)
1147 struct batadv_priv
*bat_priv
= netdev_priv(dev
);
1150 for (i
= 0; i
< BATADV_CNT_NUM
; i
++)
1151 data
[i
] = batadv_sum_counter(bat_priv
, i
);
1154 static int batadv_get_sset_count(struct net_device
*dev
, int stringset
)
1156 if (stringset
== ETH_SS_STATS
)
1157 return BATADV_CNT_NUM
;