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/rtnetlink.h>
43 #include <linux/skbuff.h>
44 #include <linux/slab.h>
45 #include <linux/socket.h>
46 #include <linux/spinlock.h>
47 #include <linux/stddef.h>
48 #include <linux/string.h>
49 #include <linux/types.h>
52 #include "bridge_loop_avoidance.h"
54 #include "distributed-arp-table.h"
55 #include "gateway_client.h"
56 #include "gateway_common.h"
57 #include "hard-interface.h"
58 #include "multicast.h"
59 #include "network-coding.h"
60 #include "originator.h"
64 #include "translation-table.h"
66 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
67 static void batadv_get_drvinfo(struct net_device *dev,
68 struct ethtool_drvinfo *info);
69 static u32 batadv_get_msglevel(struct net_device *dev);
70 static void batadv_set_msglevel(struct net_device *dev, u32 value);
71 static u32 batadv_get_link(struct net_device *dev);
72 static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data);
73 static void batadv_get_ethtool_stats(struct net_device *dev,
74 struct ethtool_stats *stats, u64 *data);
75 static int batadv_get_sset_count(struct net_device *dev, int stringset);
77 static const struct ethtool_ops batadv_ethtool_ops = {
78 .get_settings = batadv_get_settings,
79 .get_drvinfo = batadv_get_drvinfo,
80 .get_msglevel = batadv_get_msglevel,
81 .set_msglevel = batadv_set_msglevel,
82 .get_link = batadv_get_link,
83 .get_strings = batadv_get_strings,
84 .get_ethtool_stats = batadv_get_ethtool_stats,
85 .get_sset_count = batadv_get_sset_count,
88 int batadv_skb_head_push(struct sk_buff *skb, unsigned int len)
92 /* TODO: We must check if we can release all references to non-payload
93 * data using skb_header_release in our skbs to allow skb_cow_header to
94 * work optimally. This means that those skbs are not allowed to read
95 * or write any data which is before the current position of skb->data
96 * after that call and thus allow other skbs with the same data buffer
97 * to write freely in that area.
99 result = skb_cow_head(skb, len);
107 static int batadv_interface_open(struct net_device *dev)
109 netif_start_queue(dev);
113 static int batadv_interface_release(struct net_device *dev)
115 netif_stop_queue(dev);
119 static struct net_device_stats *batadv_interface_stats(struct net_device *dev)
121 struct batadv_priv *bat_priv = netdev_priv(dev);
122 struct net_device_stats *stats = &bat_priv->stats;
124 stats->tx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_TX);
125 stats->tx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_TX_BYTES);
126 stats->tx_dropped = batadv_sum_counter(bat_priv, BATADV_CNT_TX_DROPPED);
127 stats->rx_packets = batadv_sum_counter(bat_priv, BATADV_CNT_RX);
128 stats->rx_bytes = batadv_sum_counter(bat_priv, BATADV_CNT_RX_BYTES);
132 static int batadv_interface_set_mac_addr(struct net_device *dev, void *p)
134 struct batadv_priv *bat_priv = netdev_priv(dev);
135 struct batadv_softif_vlan *vlan;
136 struct sockaddr *addr = p;
137 u8 old_addr[ETH_ALEN];
139 if (!is_valid_ether_addr(addr->sa_data))
140 return -EADDRNOTAVAIL;
142 ether_addr_copy(old_addr, dev->dev_addr);
143 ether_addr_copy(dev->dev_addr, addr->sa_data);
145 /* only modify transtable if it has been initialized before */
146 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
150 hlist_for_each_entry_rcu(vlan, &bat_priv->softif_vlan_list, list) {
151 batadv_tt_local_remove(bat_priv, old_addr, vlan->vid,
152 "mac address changed", false);
153 batadv_tt_local_add(dev, addr->sa_data, vlan->vid,
154 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
161 static int batadv_interface_change_mtu(struct net_device *dev, int new_mtu)
164 if ((new_mtu < 68) || (new_mtu > batadv_hardif_min_mtu(dev)))
173 * batadv_interface_set_rx_mode - set the rx mode of a device
174 * @dev: registered network device to modify
176 * We do not actually need to set any rx filters for the virtual batman
177 * soft interface. However a dummy handler enables a user to set static
178 * multicast listeners for instance.
180 static void batadv_interface_set_rx_mode(struct net_device *dev)
184 static int batadv_interface_tx(struct sk_buff *skb,
185 struct net_device *soft_iface)
187 struct ethhdr *ethhdr;
188 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
189 struct batadv_hard_iface *primary_if = NULL;
190 struct batadv_bcast_packet *bcast_packet;
191 static const u8 stp_addr[ETH_ALEN] = {0x01, 0x80, 0xC2, 0x00,
193 static const u8 ectp_addr[ETH_ALEN] = {0xCF, 0x00, 0x00, 0x00,
195 enum batadv_dhcp_recipient dhcp_rcp = BATADV_DHCP_NO;
196 u8 *dst_hint = NULL, chaddr[ETH_ALEN];
197 struct vlan_ethhdr *vhdr;
198 unsigned int header_len = 0;
199 int data_len = skb->len, ret;
200 unsigned long brd_delay = 1;
201 bool do_bcast = false, client_added;
205 enum batadv_forw_mode forw_mode;
206 struct batadv_orig_node *mcast_single_orig = NULL;
207 int network_offset = ETH_HLEN;
209 if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
212 netif_trans_update(soft_iface);
213 vid = batadv_get_vid(skb, 0);
215 skb_reset_mac_header(skb);
216 ethhdr = eth_hdr(skb);
218 switch (ntohs(ethhdr->h_proto)) {
220 if (!pskb_may_pull(skb, sizeof(*vhdr)))
222 vhdr = vlan_eth_hdr(skb);
224 /* drop batman-in-batman packets to prevent loops */
225 if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) {
226 network_offset += VLAN_HLEN;
235 skb_set_network_header(skb, network_offset);
237 if (batadv_bla_tx(bat_priv, skb, vid))
240 /* skb->data might have been reallocated by batadv_bla_tx() */
241 ethhdr = eth_hdr(skb);
243 /* Register the client MAC in the transtable */
244 if (!is_multicast_ether_addr(ethhdr->h_source)) {
245 client_added = batadv_tt_local_add(soft_iface, ethhdr->h_source,
252 /* don't accept stp packets. STP does not help in meshes.
253 * better use the bridge loop avoidance ...
255 * The same goes for ECTP sent at least by some Cisco Switches,
256 * it might confuse the mesh when used with bridge loop avoidance.
258 if (batadv_compare_eth(ethhdr->h_dest, stp_addr))
261 if (batadv_compare_eth(ethhdr->h_dest, ectp_addr))
264 gw_mode = atomic_read(&bat_priv->gw.mode);
265 if (is_multicast_ether_addr(ethhdr->h_dest)) {
266 /* if gw mode is off, broadcast every packet */
267 if (gw_mode == BATADV_GW_MODE_OFF) {
272 dhcp_rcp = batadv_gw_dhcp_recipient_get(skb, &header_len,
274 /* skb->data may have been modified by
275 * batadv_gw_dhcp_recipient_get()
277 ethhdr = eth_hdr(skb);
278 /* if gw_mode is on, broadcast any non-DHCP message.
279 * All the DHCP packets are going to be sent as unicast
281 if (dhcp_rcp == BATADV_DHCP_NO) {
286 if (dhcp_rcp == BATADV_DHCP_TO_CLIENT)
288 else if ((gw_mode == BATADV_GW_MODE_SERVER) &&
289 (dhcp_rcp == BATADV_DHCP_TO_SERVER))
290 /* gateways should not forward any DHCP message if
291 * directed to a DHCP server
296 if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
297 forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
299 if (forw_mode == BATADV_FORW_NONE)
302 if (forw_mode == BATADV_FORW_SINGLE)
307 batadv_skb_set_priority(skb, 0);
309 /* ethernet packet should be broadcasted */
311 primary_if = batadv_primary_if_get_selected(bat_priv);
315 /* in case of ARP request, we do not immediately broadcasti the
316 * packet, instead we first wait for DAT to try to retrieve the
319 if (batadv_dat_snoop_outgoing_arp_request(bat_priv, skb))
320 brd_delay = msecs_to_jiffies(ARP_REQ_DELAY);
322 if (batadv_skb_head_push(skb, sizeof(*bcast_packet)) < 0)
325 bcast_packet = (struct batadv_bcast_packet *)skb->data;
326 bcast_packet->version = BATADV_COMPAT_VERSION;
327 bcast_packet->ttl = BATADV_TTL;
329 /* batman packet type: broadcast */
330 bcast_packet->packet_type = BATADV_BCAST;
331 bcast_packet->reserved = 0;
333 /* hw address of first interface is the orig mac because only
334 * this mac is known throughout the mesh
336 ether_addr_copy(bcast_packet->orig,
337 primary_if->net_dev->dev_addr);
339 /* set broadcast sequence number */
340 seqno = atomic_inc_return(&bat_priv->bcast_seqno);
341 bcast_packet->seqno = htonl(seqno);
343 batadv_add_bcast_packet_to_list(bat_priv, skb, brd_delay);
345 /* a copy is stored in the bcast list, therefore removing
352 /* DHCP packets going to a server will use the GW feature */
353 if (dhcp_rcp == BATADV_DHCP_TO_SERVER) {
354 ret = batadv_gw_out_of_range(bat_priv, skb);
357 ret = batadv_send_skb_via_gw(bat_priv, skb, vid);
358 } else if (mcast_single_orig) {
359 ret = batadv_mcast_forw_send_orig(bat_priv, skb, vid,
362 if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
366 batadv_dat_snoop_outgoing_arp_reply(bat_priv, skb);
368 ret = batadv_send_skb_via_tt(bat_priv, skb, dst_hint,
371 if (ret == NET_XMIT_DROP)
375 batadv_inc_counter(bat_priv, BATADV_CNT_TX);
376 batadv_add_counter(bat_priv, BATADV_CNT_TX_BYTES, data_len);
382 batadv_inc_counter(bat_priv, BATADV_CNT_TX_DROPPED);
384 if (mcast_single_orig)
385 batadv_orig_node_put(mcast_single_orig);
387 batadv_hardif_put(primary_if);
392 * batadv_interface_rx - receive ethernet frame on local batman-adv interface
393 * @soft_iface: local interface which will receive the ethernet frame
394 * @skb: ethernet frame for @soft_iface
395 * @hdr_size: size of already parsed batman-adv header
396 * @orig_node: originator from which the batman-adv packet was sent
398 * Sends a ethernet frame to the receive path of the local @soft_iface.
399 * skb->data has still point to the batman-adv header with the size @hdr_size.
400 * The caller has to have parsed this header already and made sure that at least
401 * @hdr_size bytes are still available for pull in @skb.
403 * The packet may still get dropped. This can happen when the encapsulated
404 * ethernet frame is invalid or contains again an batman-adv packet. Also
405 * unicast packets will be dropped directly when it was sent between two
408 void batadv_interface_rx(struct net_device *soft_iface,
409 struct sk_buff *skb, int hdr_size,
410 struct batadv_orig_node *orig_node)
412 struct batadv_bcast_packet *batadv_bcast_packet;
413 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
414 struct vlan_ethhdr *vhdr;
415 struct ethhdr *ethhdr;
419 batadv_bcast_packet = (struct batadv_bcast_packet *)skb->data;
420 packet_type = batadv_bcast_packet->packet_type;
422 skb_pull_rcsum(skb, hdr_size);
423 skb_reset_mac_header(skb);
425 /* clean the netfilter state now that the batman-adv header has been
430 if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
433 vid = batadv_get_vid(skb, 0);
434 ethhdr = eth_hdr(skb);
436 switch (ntohs(ethhdr->h_proto)) {
438 if (!pskb_may_pull(skb, VLAN_ETH_HLEN))
441 vhdr = (struct vlan_ethhdr *)skb->data;
443 /* drop batman-in-batman packets to prevent loops */
444 if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
452 /* skb->dev & skb->pkt_type are set here */
453 skb->protocol = eth_type_trans(skb, soft_iface);
454 skb_postpull_rcsum(skb, eth_hdr(skb), ETH_HLEN);
456 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
457 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
458 skb->len + ETH_HLEN);
460 soft_iface->last_rx = jiffies;
462 /* Let the bridge loop avoidance check the packet. If will
463 * not handle it, we can safely push it up.
465 if (batadv_bla_rx(bat_priv, skb, vid, packet_type))
469 batadv_tt_add_temporary_global_entry(bat_priv, orig_node,
470 ethhdr->h_source, vid);
472 if (is_multicast_ether_addr(ethhdr->h_dest)) {
473 /* set the mark on broadcast packets if AP isolation is ON and
474 * the packet is coming from an "isolated" client
476 if (batadv_vlan_ap_isola_get(bat_priv, vid) &&
477 batadv_tt_global_is_isolated(bat_priv, ethhdr->h_source,
479 /* save bits in skb->mark not covered by the mask and
480 * apply the mark on the rest
482 skb->mark &= ~bat_priv->isolation_mark_mask;
483 skb->mark |= bat_priv->isolation_mark;
485 } else if (batadv_is_ap_isolated(bat_priv, ethhdr->h_source,
486 ethhdr->h_dest, vid)) {
500 * batadv_softif_vlan_release - release vlan from lists and queue for free after
502 * @ref: kref pointer of the vlan object
504 static void batadv_softif_vlan_release(struct kref *ref)
506 struct batadv_softif_vlan *vlan;
508 vlan = container_of(ref, struct batadv_softif_vlan, refcount);
510 spin_lock_bh(&vlan->bat_priv->softif_vlan_list_lock);
511 hlist_del_rcu(&vlan->list);
512 spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);
514 kfree_rcu(vlan, rcu);
518 * batadv_softif_vlan_put - decrease the vlan object refcounter and
519 * possibly release it
520 * @vlan: the vlan object to release
522 void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan)
527 kref_put(&vlan->refcount, batadv_softif_vlan_release);
531 * batadv_softif_vlan_get - get the vlan object for a specific vid
532 * @bat_priv: the bat priv with all the soft interface information
533 * @vid: the identifier of the vlan object to retrieve
535 * Return: the private data of the vlan matching the vid passed as argument or
536 * NULL otherwise. The refcounter of the returned object is incremented by 1.
538 struct batadv_softif_vlan *batadv_softif_vlan_get(struct batadv_priv *bat_priv,
541 struct batadv_softif_vlan *vlan_tmp, *vlan = NULL;
544 hlist_for_each_entry_rcu(vlan_tmp, &bat_priv->softif_vlan_list, list) {
545 if (vlan_tmp->vid != vid)
548 if (!kref_get_unless_zero(&vlan_tmp->refcount))
560 * batadv_softif_create_vlan - allocate the needed resources for a new vlan
561 * @bat_priv: the bat priv with all the soft interface information
562 * @vid: the VLAN identifier
564 * Return: 0 on success, a negative error otherwise.
566 int batadv_softif_create_vlan(struct batadv_priv *bat_priv, unsigned short vid)
568 struct batadv_softif_vlan *vlan;
571 spin_lock_bh(&bat_priv->softif_vlan_list_lock);
573 vlan = batadv_softif_vlan_get(bat_priv, vid);
575 batadv_softif_vlan_put(vlan);
576 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
580 vlan = kzalloc(sizeof(*vlan), GFP_ATOMIC);
582 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
586 vlan->bat_priv = bat_priv;
588 kref_init(&vlan->refcount);
590 atomic_set(&vlan->ap_isolation, 0);
592 kref_get(&vlan->refcount);
593 hlist_add_head_rcu(&vlan->list, &bat_priv->softif_vlan_list);
594 spin_unlock_bh(&bat_priv->softif_vlan_list_lock);
596 /* batadv_sysfs_add_vlan cannot be in the spinlock section due to the
597 * sleeping behavior of the sysfs functions and the fs_reclaim lock
599 err = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
601 /* ref for the function */
602 batadv_softif_vlan_put(vlan);
604 /* ref for the list */
605 batadv_softif_vlan_put(vlan);
609 /* add a new TT local entry. This one will be marked with the NOPURGE
612 batadv_tt_local_add(bat_priv->soft_iface,
613 bat_priv->soft_iface->dev_addr, vid,
614 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
616 /* don't return reference to new softif_vlan */
617 batadv_softif_vlan_put(vlan);
623 * batadv_softif_destroy_vlan - remove and destroy a softif_vlan object
624 * @bat_priv: the bat priv with all the soft interface information
625 * @vlan: the object to remove
627 static void batadv_softif_destroy_vlan(struct batadv_priv *bat_priv,
628 struct batadv_softif_vlan *vlan)
630 /* explicitly remove the associated TT local entry because it is marked
631 * with the NOPURGE flag
633 batadv_tt_local_remove(bat_priv, bat_priv->soft_iface->dev_addr,
634 vlan->vid, "vlan interface destroyed", false);
636 batadv_sysfs_del_vlan(bat_priv, vlan);
637 batadv_softif_vlan_put(vlan);
641 * batadv_interface_add_vid - ndo_add_vid API implementation
642 * @dev: the netdev of the mesh interface
643 * @proto: protocol of the the vlan id
644 * @vid: identifier of the new vlan
646 * Set up all the internal structures for handling the new vlan on top of the
649 * Return: 0 on success or a negative error code in case of failure.
651 static int batadv_interface_add_vid(struct net_device *dev, __be16 proto,
654 struct batadv_priv *bat_priv = netdev_priv(dev);
655 struct batadv_softif_vlan *vlan;
658 /* only 802.1Q vlans are supported.
659 * batman-adv does not know how to handle other types
661 if (proto != htons(ETH_P_8021Q))
664 vid |= BATADV_VLAN_HAS_TAG;
666 /* if a new vlan is getting created and it already exists, it means that
667 * it was not deleted yet. batadv_softif_vlan_get() increases the
668 * refcount in order to revive the object.
670 * if it does not exist then create it.
672 vlan = batadv_softif_vlan_get(bat_priv, vid);
674 return batadv_softif_create_vlan(bat_priv, vid);
676 /* recreate the sysfs object if it was already destroyed (and it should
677 * be since we received a kill_vid() for this vlan
680 ret = batadv_sysfs_add_vlan(bat_priv->soft_iface, vlan);
682 batadv_softif_vlan_put(vlan);
687 /* add a new TT local entry. This one will be marked with the NOPURGE
688 * flag. This must be added again, even if the vlan object already
689 * exists, because the entry was deleted by kill_vid()
691 batadv_tt_local_add(bat_priv->soft_iface,
692 bat_priv->soft_iface->dev_addr, vid,
693 BATADV_NULL_IFINDEX, BATADV_NO_MARK);
699 * batadv_interface_kill_vid - ndo_kill_vid API implementation
700 * @dev: the netdev of the mesh interface
701 * @proto: protocol of the the vlan id
702 * @vid: identifier of the deleted vlan
704 * Destroy all the internal structures used to handle the vlan identified by vid
705 * on top of the mesh interface
707 * Return: 0 on success, -EINVAL if the specified prototype is not ETH_P_8021Q
708 * or -ENOENT if the specified vlan id wasn't registered.
710 static int batadv_interface_kill_vid(struct net_device *dev, __be16 proto,
713 struct batadv_priv *bat_priv = netdev_priv(dev);
714 struct batadv_softif_vlan *vlan;
716 /* only 802.1Q vlans are supported. batman-adv does not know how to
719 if (proto != htons(ETH_P_8021Q))
722 vlan = batadv_softif_vlan_get(bat_priv, vid | BATADV_VLAN_HAS_TAG);
726 batadv_softif_destroy_vlan(bat_priv, vlan);
728 /* finally free the vlan object */
729 batadv_softif_vlan_put(vlan);
734 /* batman-adv network devices have devices nesting below it and are a special
735 * "super class" of normal network devices; split their locks off into a
736 * separate class since they always nest.
738 static struct lock_class_key batadv_netdev_xmit_lock_key;
739 static struct lock_class_key batadv_netdev_addr_lock_key;
742 * batadv_set_lockdep_class_one - Set lockdep class for a single tx queue
743 * @dev: device which owns the tx queue
744 * @txq: tx queue to modify
745 * @_unused: always NULL
747 static void batadv_set_lockdep_class_one(struct net_device *dev,
748 struct netdev_queue *txq,
751 lockdep_set_class(&txq->_xmit_lock, &batadv_netdev_xmit_lock_key);
755 * batadv_set_lockdep_class - Set txq and addr_list lockdep class
756 * @dev: network device to modify
758 static void batadv_set_lockdep_class(struct net_device *dev)
760 lockdep_set_class(&dev->addr_list_lock, &batadv_netdev_addr_lock_key);
761 netdev_for_each_tx_queue(dev, batadv_set_lockdep_class_one, NULL);
765 * batadv_softif_init_late - late stage initialization of soft interface
766 * @dev: registered network device to modify
768 * Return: error code on failures
770 static int batadv_softif_init_late(struct net_device *dev)
772 struct batadv_priv *bat_priv;
775 size_t cnt_len = sizeof(u64) * BATADV_CNT_NUM;
777 batadv_set_lockdep_class(dev);
779 bat_priv = netdev_priv(dev);
780 bat_priv->soft_iface = dev;
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.querier_ipv4.exists = false;
799 bat_priv->mcast.querier_ipv4.shadowing = false;
800 bat_priv->mcast.querier_ipv6.exists = false;
801 bat_priv->mcast.querier_ipv6.shadowing = false;
802 bat_priv->mcast.flags = BATADV_NO_FLAGS;
803 atomic_set(&bat_priv->multicast_mode, 1);
804 atomic_set(&bat_priv->mcast.num_disabled, 0);
805 atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
806 atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
807 atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
809 atomic_set(&bat_priv->gw.mode, BATADV_GW_MODE_OFF);
810 atomic_set(&bat_priv->gw.bandwidth_down, 100);
811 atomic_set(&bat_priv->gw.bandwidth_up, 20);
812 atomic_set(&bat_priv->orig_interval, 1000);
813 atomic_set(&bat_priv->hop_penalty, 30);
814 #ifdef CONFIG_BATMAN_ADV_DEBUG
815 atomic_set(&bat_priv->log_level, 0);
817 atomic_set(&bat_priv->fragmentation, 1);
818 atomic_set(&bat_priv->packet_size_max, ETH_DATA_LEN);
819 atomic_set(&bat_priv->bcast_queue_left, BATADV_BCAST_QUEUE_LEN);
820 atomic_set(&bat_priv->batman_queue_left, BATADV_BATMAN_QUEUE_LEN);
822 atomic_set(&bat_priv->mesh_state, BATADV_MESH_INACTIVE);
823 atomic_set(&bat_priv->bcast_seqno, 1);
824 atomic_set(&bat_priv->tt.vn, 0);
825 atomic_set(&bat_priv->tt.local_changes, 0);
826 atomic_set(&bat_priv->tt.ogm_append_cnt, 0);
827 #ifdef CONFIG_BATMAN_ADV_BLA
828 atomic_set(&bat_priv->bla.num_requests, 0);
830 atomic_set(&bat_priv->tp_num, 0);
832 bat_priv->tt.last_changeset = NULL;
833 bat_priv->tt.last_changeset_len = 0;
834 bat_priv->isolation_mark = 0;
835 bat_priv->isolation_mark_mask = 0;
837 /* randomize initial seqno to avoid collision */
838 get_random_bytes(&random_seqno, sizeof(random_seqno));
839 atomic_set(&bat_priv->frag_seqno, random_seqno);
841 bat_priv->primary_if = NULL;
842 bat_priv->num_ifaces = 0;
844 batadv_nc_init_bat_priv(bat_priv);
846 ret = batadv_algo_select(bat_priv, batadv_routing_algo);
848 goto free_bat_counters;
850 ret = batadv_debugfs_add_meshif(dev);
852 goto free_bat_counters;
854 ret = batadv_mesh_init(dev);
861 batadv_debugfs_del_meshif(dev);
863 free_percpu(bat_priv->bat_counters);
864 bat_priv->bat_counters = NULL;
870 * batadv_softif_slave_add - Add a slave interface to a batadv_soft_interface
871 * @dev: batadv_soft_interface used as master interface
872 * @slave_dev: net_device which should become the slave interface
874 * Return: 0 if successful or error otherwise.
876 static int batadv_softif_slave_add(struct net_device *dev,
877 struct net_device *slave_dev)
879 struct batadv_hard_iface *hard_iface;
880 struct net *net = dev_net(dev);
883 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
884 if (!hard_iface || hard_iface->soft_iface)
887 ret = batadv_hardif_enable_interface(hard_iface, net, dev->name);
891 batadv_hardif_put(hard_iface);
896 * batadv_softif_slave_del - Delete a slave iface from a batadv_soft_interface
897 * @dev: batadv_soft_interface used as master interface
898 * @slave_dev: net_device which should be removed from the master interface
900 * Return: 0 if successful or error otherwise.
902 static int batadv_softif_slave_del(struct net_device *dev,
903 struct net_device *slave_dev)
905 struct batadv_hard_iface *hard_iface;
908 hard_iface = batadv_hardif_get_by_netdev(slave_dev);
910 if (!hard_iface || hard_iface->soft_iface != dev)
913 batadv_hardif_disable_interface(hard_iface, BATADV_IF_CLEANUP_KEEP);
918 batadv_hardif_put(hard_iface);
922 static const struct net_device_ops batadv_netdev_ops = {
923 .ndo_init = batadv_softif_init_late,
924 .ndo_open = batadv_interface_open,
925 .ndo_stop = batadv_interface_release,
926 .ndo_get_stats = batadv_interface_stats,
927 .ndo_vlan_rx_add_vid = batadv_interface_add_vid,
928 .ndo_vlan_rx_kill_vid = batadv_interface_kill_vid,
929 .ndo_set_mac_address = batadv_interface_set_mac_addr,
930 .ndo_change_mtu = batadv_interface_change_mtu,
931 .ndo_set_rx_mode = batadv_interface_set_rx_mode,
932 .ndo_start_xmit = batadv_interface_tx,
933 .ndo_validate_addr = eth_validate_addr,
934 .ndo_add_slave = batadv_softif_slave_add,
935 .ndo_del_slave = batadv_softif_slave_del,
939 * batadv_softif_free - Deconstructor of batadv_soft_interface
940 * @dev: Device to cleanup and remove
942 static void batadv_softif_free(struct net_device *dev)
944 batadv_debugfs_del_meshif(dev);
945 batadv_mesh_free(dev);
947 /* some scheduled RCU callbacks need the bat_priv struct to accomplish
948 * their tasks. Wait for them all to be finished before freeing the
949 * netdev and its private data (bat_priv)
957 * batadv_softif_init_early - early stage initialization of soft interface
958 * @dev: registered network device to modify
960 static void batadv_softif_init_early(struct net_device *dev)
962 struct batadv_priv *priv = netdev_priv(dev);
966 dev->netdev_ops = &batadv_netdev_ops;
967 dev->destructor = batadv_softif_free;
968 dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
969 dev->priv_flags |= IFF_NO_QUEUE;
971 /* can't call min_mtu, because the needed variables
972 * have not been initialized yet
974 dev->mtu = ETH_DATA_LEN;
976 /* generate random address */
977 eth_hw_addr_random(dev);
979 dev->ethtool_ops = &batadv_ethtool_ops;
981 memset(priv, 0, sizeof(*priv));
984 struct net_device *batadv_softif_create(struct net *net, const char *name)
986 struct net_device *soft_iface;
989 soft_iface = alloc_netdev(sizeof(struct batadv_priv), name,
990 NET_NAME_UNKNOWN, batadv_softif_init_early);
994 dev_net_set(soft_iface, net);
996 soft_iface->rtnl_link_ops = &batadv_link_ops;
998 ret = register_netdevice(soft_iface);
1000 pr_err("Unable to register the batman interface '%s': %i\n",
1002 free_netdev(soft_iface);
1010 * batadv_softif_destroy_sysfs - deletion of batadv_soft_interface via sysfs
1011 * @soft_iface: the to-be-removed batman-adv interface
1013 void batadv_softif_destroy_sysfs(struct net_device *soft_iface)
1015 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
1016 struct batadv_softif_vlan *vlan;
1020 /* destroy the "untagged" VLAN */
1021 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
1023 batadv_softif_destroy_vlan(bat_priv, vlan);
1024 batadv_softif_vlan_put(vlan);
1027 batadv_sysfs_del_meshif(soft_iface);
1028 unregister_netdevice(soft_iface);
1032 * batadv_softif_destroy_netlink - deletion of batadv_soft_interface via netlink
1033 * @soft_iface: the to-be-removed batman-adv interface
1034 * @head: list pointer
1036 static void batadv_softif_destroy_netlink(struct net_device *soft_iface,
1037 struct list_head *head)
1039 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
1040 struct batadv_hard_iface *hard_iface;
1041 struct batadv_softif_vlan *vlan;
1043 list_for_each_entry(hard_iface, &batadv_hardif_list, list) {
1044 if (hard_iface->soft_iface == soft_iface)
1045 batadv_hardif_disable_interface(hard_iface,
1046 BATADV_IF_CLEANUP_KEEP);
1049 /* destroy the "untagged" VLAN */
1050 vlan = batadv_softif_vlan_get(bat_priv, BATADV_NO_FLAGS);
1052 batadv_softif_destroy_vlan(bat_priv, vlan);
1053 batadv_softif_vlan_put(vlan);
1056 batadv_sysfs_del_meshif(soft_iface);
1057 unregister_netdevice_queue(soft_iface, head);
1060 bool batadv_softif_is_valid(const struct net_device *net_dev)
1062 if (net_dev->netdev_ops->ndo_start_xmit == batadv_interface_tx)
1068 struct rtnl_link_ops batadv_link_ops __read_mostly = {
1070 .priv_size = sizeof(struct batadv_priv),
1071 .setup = batadv_softif_init_early,
1072 .dellink = batadv_softif_destroy_netlink,
1076 static int batadv_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
1079 cmd->advertising = 0;
1080 ethtool_cmd_speed_set(cmd, SPEED_10);
1081 cmd->duplex = DUPLEX_FULL;
1082 cmd->port = PORT_TP;
1083 cmd->phy_address = 0;
1084 cmd->transceiver = XCVR_INTERNAL;
1085 cmd->autoneg = AUTONEG_DISABLE;
1092 static void batadv_get_drvinfo(struct net_device *dev,
1093 struct ethtool_drvinfo *info)
1095 strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
1096 strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
1097 strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
1098 strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
1101 static u32 batadv_get_msglevel(struct net_device *dev)
1106 static void batadv_set_msglevel(struct net_device *dev, u32 value)
1110 static u32 batadv_get_link(struct net_device *dev)
1115 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
1116 * Declare each description string in struct.name[] to get fixed sized buffer
1117 * and compile time checking for strings longer than ETH_GSTRING_LEN.
1119 static const struct {
1120 const char name[ETH_GSTRING_LEN];
1121 } batadv_counters_strings[] = {
1128 { "forward_bytes" },
1130 { "mgmt_tx_bytes" },
1132 { "mgmt_rx_bytes" },
1134 { "frag_tx_bytes" },
1136 { "frag_rx_bytes" },
1138 { "frag_fwd_bytes" },
1139 { "tt_request_tx" },
1140 { "tt_request_rx" },
1141 { "tt_response_tx" },
1142 { "tt_response_rx" },
1143 { "tt_roam_adv_tx" },
1144 { "tt_roam_adv_rx" },
1145 #ifdef CONFIG_BATMAN_ADV_DAT
1150 { "dat_cached_reply_tx" },
1152 #ifdef CONFIG_BATMAN_ADV_NC
1154 { "nc_code_bytes" },
1156 { "nc_recode_bytes" },
1159 { "nc_decode_bytes" },
1160 { "nc_decode_failed" },
1165 static void batadv_get_strings(struct net_device *dev, u32 stringset, u8 *data)
1167 if (stringset == ETH_SS_STATS)
1168 memcpy(data, batadv_counters_strings,
1169 sizeof(batadv_counters_strings));
1172 static void batadv_get_ethtool_stats(struct net_device *dev,
1173 struct ethtool_stats *stats, u64 *data)
1175 struct batadv_priv *bat_priv = netdev_priv(dev);
1178 for (i = 0; i < BATADV_CNT_NUM; i++)
1179 data[i] = batadv_sum_counter(bat_priv, i);
1182 static int batadv_get_sset_count(struct net_device *dev, int stringset)
1184 if (stringset == ETH_SS_STATS)
1185 return BATADV_CNT_NUM;