forked from ~ljy/RK356X_SDK_RELEASE
blame | history | patch | commit | commitdiff
hc
2023-12-11 072de836f53be56a70cecf70b43ae43b7ce17376 
 kernel/net/batman-adv/soft-interface.c
....@@ -1,19 +1,7 @@
11 // SPDX-License-Identifier: GPL-2.0
2
-/* Copyright (C) 2007-2018  B.A.T.M.A.N. contributors:
2
+/* Copyright (C) 2007-2020  B.A.T.M.A.N. contributors:
33  *
44  * Marek Lindner, Simon Wunderlich
5
- *
6
- * This program is free software; you can redistribute it and/or
7
- * modify it under the terms of version 2 of the GNU General Public
8
- * License as published by the Free Software Foundation.
9
- *
10
- * This program is distributed in the hope that it will be useful, but
11
- * WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
- * General Public License for more details.
14
- *
15
- * You should have received a copy of the GNU General Public License
16
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
175  */
186 
197 #include "soft-interface.h"
....@@ -36,6 +24,7 @@
3624 #include <linux/list.h>
3725 #include <linux/lockdep.h>
3826 #include <linux/netdevice.h>
27
+#include <linux/netlink.h>
3928 #include <linux/percpu.h>
4029 #include <linux/printk.h>
4130 #include <linux/random.h>
....@@ -50,13 +39,13 @@
5039 #include <linux/string.h>
5140 #include <linux/types.h>
5241 #include <uapi/linux/batadv_packet.h>
42
+#include <uapi/linux/batman_adv.h>
5343 
5444 #include "bat_algo.h"
5545 #include "bridge_loop_avoidance.h"
5646 #include "debugfs.h"
5747 #include "distributed-arp-table.h"
5848 #include "gateway_client.h"
59
-#include "gateway_common.h"
6049 #include "hard-interface.h"
6150 #include "multicast.h"
6251 #include "network-coding.h"
....@@ -209,9 +198,11 @@
209198 	unsigned short vid;
210199 	u32 seqno;
211200 	int gw_mode;
212
-	enum batadv_forw_mode forw_mode;
201
+	enum batadv_forw_mode forw_mode = BATADV_FORW_SINGLE;
213202 	struct batadv_orig_node *mcast_single_orig = NULL;
203
+	int mcast_is_routable = 0;
214204 	int network_offset = ETH_HLEN;
205
+	__be16 proto;
215206 
216207 	if (atomic_read(&bat_priv->mesh_state) != BATADV_MESH_ACTIVE)
217208 		goto dropped;
....@@ -225,19 +216,22 @@
225216 	skb_reset_mac_header(skb);
226217 	ethhdr = eth_hdr(skb);
227218 
228
-	switch (ntohs(ethhdr->h_proto)) {
219
+	proto = ethhdr->h_proto;
220
+
221
+	switch (ntohs(proto)) {
229222 	case ETH_P_8021Q:
230223 		if (!pskb_may_pull(skb, sizeof(*vhdr)))
231224 			goto dropped;
232225 		vhdr = vlan_eth_hdr(skb);
226
+		proto = vhdr->h_vlan_encapsulated_proto;
233227 
234228 		/* drop batman-in-batman packets to prevent loops */
235
-		if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN)) {
229
+		if (proto != htons(ETH_P_BATMAN)) {
236230 			network_offset += VLAN_HLEN;
237231 			break;
238232 		}
239233 
240
-		/* fall through */
234
+		fallthrough;
241235 	case ETH_P_BATMAN:
242236 		goto dropped;
243237 	}
....@@ -259,6 +253,9 @@
259253 		if (!client_added)
260254 			goto dropped;
261255 	}
256
+
257
+	/* Snoop address candidates from DHCPACKs for early DAT filling */
258
+	batadv_dat_snoop_outgoing_dhcp_ack(bat_priv, skb, proto, vid);
262259 
263260 	/* don't accept stp packets. STP does not help in meshes.
264261 	 * better use the bridge loop avoidance ...
....@@ -306,11 +303,13 @@
306303 send:
307304 		if (do_bcast && !is_broadcast_ether_addr(ethhdr->h_dest)) {
308305 			forw_mode = batadv_mcast_forw_mode(bat_priv, skb,
309
-							   &mcast_single_orig);
306
+							   &mcast_single_orig,
307
+							   &mcast_is_routable);
310308 			if (forw_mode == BATADV_FORW_NONE)
311309 				goto dropped;
312310 
313
-			if (forw_mode == BATADV_FORW_SINGLE)
311
+			if (forw_mode == BATADV_FORW_SINGLE ||
312
+			    forw_mode == BATADV_FORW_SOME)
314313 				do_bcast = false;
315314 		}
316315 	}
....@@ -369,6 +368,9 @@
369368 		} else if (mcast_single_orig) {
370369 			ret = batadv_mcast_forw_send_orig(bat_priv, skb, vid,
371370 							  mcast_single_orig);
371
+		} else if (forw_mode == BATADV_FORW_SOME) {
372
+			ret = batadv_mcast_forw_send(bat_priv, skb, vid,
373
+						     mcast_is_routable);
372374 		} else {
373375 			if (batadv_dat_snoop_outgoing_arp_request(bat_priv,
374376 								  skb))
....@@ -406,7 +408,7 @@
406408  * @hdr_size: size of already parsed batman-adv header
407409  * @orig_node: originator from which the batman-adv packet was sent
408410  *
409
- * Sends a ethernet frame to the receive path of the local @soft_iface.
411
+ * Sends an ethernet frame to the receive path of the local @soft_iface.
410412  * skb->data has still point to the batman-adv header with the size @hdr_size.
411413  * The caller has to have parsed this header already and made sure that at least
412414  * @hdr_size bytes are still available for pull in @skb.
....@@ -436,7 +438,7 @@
436438 	/* clean the netfilter state now that the batman-adv header has been
437439 	 * removed
438440 	 */
439
-	nf_reset(skb);
441
+	nf_reset_ct(skb);
440442 
441443 	if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
442444 		goto dropped;
....@@ -455,7 +457,7 @@
455457 		if (vhdr->h_vlan_encapsulated_proto != htons(ETH_P_BATMAN))
456458 			break;
457459 
458
-		/* fall through */
460
+		fallthrough;
459461 	case ETH_P_BATMAN:
460462 		goto dropped;
461463 	}
....@@ -510,7 +512,7 @@
510512  *  after rcu grace period
511513  * @ref: kref pointer of the vlan object
512514  */
513
-static void batadv_softif_vlan_release(struct kref *ref)
515
+void batadv_softif_vlan_release(struct kref *ref)
514516 {
515517 	struct batadv_softif_vlan *vlan;
516518 
....@@ -521,19 +523,6 @@
521523 	spin_unlock_bh(&vlan->bat_priv->softif_vlan_list_lock);
522524 
523525 	kfree_rcu(vlan, rcu);
524
-}
525
-
526
-/**
527
- * batadv_softif_vlan_put() - decrease the vlan object refcounter and
528
- *  possibly release it
529
- * @vlan: the vlan object to release
530
- */
531
-void batadv_softif_vlan_put(struct batadv_softif_vlan *vlan)
532
-{
533
-	if (!vlan)
534
-		return;
535
-
536
-	kref_put(&vlan->refcount, batadv_softif_vlan_release);
537526 }
538527 
539528 /**
....@@ -649,7 +638,7 @@
649638 /**
650639  * batadv_interface_add_vid() - ndo_add_vid API implementation
651640  * @dev: the netdev of the mesh interface
652
- * @proto: protocol of the the vlan id
641
+ * @proto: protocol of the vlan id
653642  * @vid: identifier of the new vlan
654643  *
655644  * Set up all the internal structures for handling the new vlan on top of the
....@@ -707,7 +696,7 @@
707696 /**
708697  * batadv_interface_kill_vid() - ndo_kill_vid API implementation
709698  * @dev: the netdev of the mesh interface
710
- * @proto: protocol of the the vlan id
699
+ * @proto: protocol of the vlan id
711700  * @vid: identifier of the deleted vlan
712701  *
713702  * Destroy all the internal structures used to handle the vlan identified by vid
....@@ -804,12 +793,8 @@
804793 	atomic_set(&bat_priv->distributed_arp_table, 1);
805794 #endif
806795 #ifdef CONFIG_BATMAN_ADV_MCAST
807
-	bat_priv->mcast.querier_ipv4.exists = false;
808
-	bat_priv->mcast.querier_ipv4.shadowing = false;
809
-	bat_priv->mcast.querier_ipv6.exists = false;
810
-	bat_priv->mcast.querier_ipv6.shadowing = false;
811
-	bat_priv->mcast.flags = BATADV_NO_FLAGS;
812796 	atomic_set(&bat_priv->multicast_mode, 1);
797
+	atomic_set(&bat_priv->multicast_fanout, 16);
813798 	atomic_set(&bat_priv->mcast.num_want_all_unsnoopables, 0);
814799 	atomic_set(&bat_priv->mcast.num_want_all_ipv4, 0);
815800 	atomic_set(&bat_priv->mcast.num_want_all_ipv6, 0);
....@@ -847,7 +832,6 @@
847832 	atomic_set(&bat_priv->frag_seqno, random_seqno);
848833 
849834 	bat_priv->primary_if = NULL;
850
-	bat_priv->num_ifaces = 0;
851835 
852836 	batadv_nc_init_bat_priv(bat_priv);
853837 
....@@ -948,10 +932,10 @@
948932 static void batadv_get_drvinfo(struct net_device *dev,
949933 			       struct ethtool_drvinfo *info)
950934 {
951
-	strlcpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
952
-	strlcpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
953
-	strlcpy(info->fw_version, "N/A", sizeof(info->fw_version));
954
-	strlcpy(info->bus_info, "batman", sizeof(info->bus_info));
935
+	strscpy(info->driver, "B.A.T.M.A.N. advanced", sizeof(info->driver));
936
+	strscpy(info->version, BATADV_SOURCE_VERSION, sizeof(info->version));
937
+	strscpy(info->fw_version, "N/A", sizeof(info->fw_version));
938
+	strscpy(info->bus_info, "batman", sizeof(info->bus_info));
955939 }
956940 
957941 /* Inspired by drivers/net/ethernet/dlink/sundance.c:1702
....@@ -1065,6 +1049,7 @@
10651049 	dev->needs_free_netdev = true;
10661050 	dev->priv_destructor = batadv_softif_free;
10671051 	dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_NETNS_LOCAL;
1052
+	dev->features |= NETIF_F_LLTX;
10681053 	dev->priv_flags |= IFF_NO_QUEUE;
10691054 
10701055 	/* can't call min_mtu, because the needed variables