Sven Eckelmann | ac79cbb | 2017-01-01 00:00:00 +0100 | [diff] [blame] | 1 | /* Copyright (C) 2007-2017 B.A.T.M.A.N. contributors: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 2 | * |
| 3 | * Marek Lindner, Simon Wunderlich |
| 4 | * |
| 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. |
| 8 | * |
| 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. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
Antonio Quartulli | ebf38fb | 2013-11-03 20:40:48 +0100 | [diff] [blame] | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 16 | */ |
| 17 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 18 | #include "send.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 19 | #include "main.h" |
| 20 | |
| 21 | #include <linux/atomic.h> |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 22 | #include <linux/bug.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 23 | #include <linux/byteorder/generic.h> |
Antonio Quartulli | f50ca95 | 2016-05-18 11:38:48 +0200 | [diff] [blame] | 24 | #include <linux/errno.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 25 | #include <linux/etherdevice.h> |
| 26 | #include <linux/fs.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 27 | #include <linux/if.h> |
Sven Eckelmann | fcafa5e | 2016-05-15 11:07:42 +0200 | [diff] [blame] | 28 | #include <linux/if_ether.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 29 | #include <linux/jiffies.h> |
| 30 | #include <linux/kernel.h> |
Sven Eckelmann | 2735344 | 2016-03-05 16:09:16 +0100 | [diff] [blame] | 31 | #include <linux/kref.h> |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 32 | #include <linux/list.h> |
| 33 | #include <linux/netdevice.h> |
| 34 | #include <linux/printk.h> |
| 35 | #include <linux/rculist.h> |
| 36 | #include <linux/rcupdate.h> |
| 37 | #include <linux/skbuff.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/spinlock.h> |
| 40 | #include <linux/stddef.h> |
| 41 | #include <linux/workqueue.h> |
| 42 | |
| 43 | #include "distributed-arp-table.h" |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 44 | #include "fragmentation.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 45 | #include "gateway_client.h" |
| 46 | #include "hard-interface.h" |
Sven Eckelmann | ba41208 | 2016-05-15 23:48:31 +0200 | [diff] [blame] | 47 | #include "log.h" |
Sven Eckelmann | 1e2c2a4 | 2015-04-17 19:40:28 +0200 | [diff] [blame] | 48 | #include "network-coding.h" |
| 49 | #include "originator.h" |
| 50 | #include "routing.h" |
| 51 | #include "soft-interface.h" |
| 52 | #include "translation-table.h" |
Antonio Quartulli | af5d4f7 | 2012-11-26 00:38:50 +0100 | [diff] [blame] | 53 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 54 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 55 | |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 56 | /** |
| 57 | * batadv_send_skb_packet - send an already prepared packet |
| 58 | * @skb: the packet to send |
| 59 | * @hard_iface: the interface to use to send the broadcast packet |
| 60 | * @dst_addr: the payload destination |
| 61 | * |
| 62 | * Send out an already prepared packet to the given neighbor or broadcast it |
| 63 | * using the specified interface. Either hard_iface or neigh_node must be not |
| 64 | * NULL. |
| 65 | * If neigh_node is NULL, then the packet is broadcasted using hard_iface, |
| 66 | * otherwise it is sent as unicast to the given neighbor. |
| 67 | * |
Sven Eckelmann | 7d72d17 | 2016-07-17 21:04:05 +0200 | [diff] [blame] | 68 | * Regardless of the return value, the skb is consumed. |
| 69 | * |
| 70 | * Return: A negative errno code is returned on a failure. A success does not |
| 71 | * guarantee the frame will be transmitted as it may be dropped due |
| 72 | * to congestion or traffic shaping. |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 73 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 74 | int batadv_send_skb_packet(struct sk_buff *skb, |
| 75 | struct batadv_hard_iface *hard_iface, |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 76 | const u8 *dst_addr) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 77 | { |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 78 | struct batadv_priv *bat_priv; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 79 | struct ethhdr *ethhdr; |
Sven Eckelmann | 7c94606 | 2017-01-28 10:12:39 +0100 | [diff] [blame] | 80 | int ret; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 81 | |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 82 | bat_priv = netdev_priv(hard_iface->soft_iface); |
| 83 | |
Sven Eckelmann | e9a4f29 | 2012-06-03 22:19:19 +0200 | [diff] [blame] | 84 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 85 | goto send_skb_err; |
| 86 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 87 | if (unlikely(!hard_iface->net_dev)) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 88 | goto send_skb_err; |
| 89 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 90 | if (!(hard_iface->net_dev->flags & IFF_UP)) { |
Sven Eckelmann | 6796958 | 2012-03-26 16:22:45 +0200 | [diff] [blame] | 91 | pr_warn("Interface %s is not up - can't send packet via that interface!\n", |
| 92 | hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 93 | goto send_skb_err; |
| 94 | } |
| 95 | |
| 96 | /* push to the ethernet header. */ |
Sven Eckelmann | 04b482a | 2012-05-12 02:09:38 +0200 | [diff] [blame] | 97 | if (batadv_skb_head_push(skb, ETH_HLEN) < 0) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 98 | goto send_skb_err; |
| 99 | |
| 100 | skb_reset_mac_header(skb); |
| 101 | |
Antonio Quartulli | 7ed4be9 | 2013-04-08 15:08:18 +0200 | [diff] [blame] | 102 | ethhdr = eth_hdr(skb); |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 103 | ether_addr_copy(ethhdr->h_source, hard_iface->net_dev->dev_addr); |
| 104 | ether_addr_copy(ethhdr->h_dest, dst_addr); |
Antonio Quartulli | 293e933 | 2013-05-19 12:55:16 +0200 | [diff] [blame] | 105 | ethhdr->h_proto = htons(ETH_P_BATMAN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 106 | |
| 107 | skb_set_network_header(skb, ETH_HLEN); |
Antonio Quartulli | 293e933 | 2013-05-19 12:55:16 +0200 | [diff] [blame] | 108 | skb->protocol = htons(ETH_P_BATMAN); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 109 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 110 | skb->dev = hard_iface->net_dev; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 111 | |
Martin Hundebøll | 612d2b4 | 2013-01-25 11:12:42 +0100 | [diff] [blame] | 112 | /* Save a clone of the skb to use when decoding coded packets */ |
| 113 | batadv_nc_skb_store_for_decoding(bat_priv, skb); |
| 114 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 115 | /* dev_queue_xmit() returns a negative result on error. However on |
| 116 | * congestion and traffic shaping, it drops and returns NET_XMIT_DROP |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 117 | * (which is > 0). This will not be treated as an error. |
| 118 | */ |
Sven Eckelmann | 7c94606 | 2017-01-28 10:12:39 +0100 | [diff] [blame] | 119 | ret = dev_queue_xmit(skb); |
| 120 | return net_xmit_eval(ret); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 121 | send_skb_err: |
| 122 | kfree_skb(skb); |
| 123 | return NET_XMIT_DROP; |
| 124 | } |
| 125 | |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 126 | int batadv_send_broadcast_skb(struct sk_buff *skb, |
| 127 | struct batadv_hard_iface *hard_iface) |
| 128 | { |
| 129 | return batadv_send_skb_packet(skb, hard_iface, batadv_broadcast_addr); |
| 130 | } |
| 131 | |
| 132 | int batadv_send_unicast_skb(struct sk_buff *skb, |
| 133 | struct batadv_neigh_node *neigh) |
| 134 | { |
| 135 | #ifdef CONFIG_BATMAN_ADV_BATMAN_V |
| 136 | struct batadv_hardif_neigh_node *hardif_neigh; |
| 137 | #endif |
| 138 | int ret; |
| 139 | |
| 140 | ret = batadv_send_skb_packet(skb, neigh->if_incoming, neigh->addr); |
| 141 | |
| 142 | #ifdef CONFIG_BATMAN_ADV_BATMAN_V |
| 143 | hardif_neigh = batadv_hardif_neigh_get(neigh->if_incoming, neigh->addr); |
| 144 | |
| 145 | if ((hardif_neigh) && (ret != NET_XMIT_DROP)) |
| 146 | hardif_neigh->bat_v.last_unicast_tx = jiffies; |
| 147 | |
| 148 | if (hardif_neigh) |
| 149 | batadv_hardif_neigh_put(hardif_neigh); |
| 150 | #endif |
| 151 | |
| 152 | return ret; |
| 153 | } |
| 154 | |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 155 | /** |
| 156 | * batadv_send_skb_to_orig - Lookup next-hop and transmit skb. |
| 157 | * @skb: Packet to be transmitted. |
| 158 | * @orig_node: Final destination of the packet. |
| 159 | * @recv_if: Interface used when receiving the packet (can be NULL). |
| 160 | * |
| 161 | * Looks up the best next-hop towards the passed originator and passes the |
| 162 | * skb on for preparation of MAC header. If the packet originated from this |
| 163 | * host, NULL can be passed as recv_if and no interface alternating is |
| 164 | * attempted. |
| 165 | * |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 166 | * Return: negative errno code on a failure, -EINPROGRESS if the skb is |
| 167 | * buffered for later transmit or the NET_XMIT status returned by the |
Antonio Quartulli | f50ca95 | 2016-05-18 11:38:48 +0200 | [diff] [blame] | 168 | * lower routine if the packet has been passed down. |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 169 | */ |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 170 | int batadv_send_skb_to_orig(struct sk_buff *skb, |
| 171 | struct batadv_orig_node *orig_node, |
| 172 | struct batadv_hard_iface *recv_if) |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 173 | { |
| 174 | struct batadv_priv *bat_priv = orig_node->bat_priv; |
| 175 | struct batadv_neigh_node *neigh_node; |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 176 | int ret; |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 177 | |
| 178 | /* batadv_find_router() increases neigh_nodes refcount if found. */ |
| 179 | neigh_node = batadv_find_router(bat_priv, orig_node, recv_if); |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 180 | if (!neigh_node) { |
| 181 | ret = -EINVAL; |
| 182 | goto free_skb; |
| 183 | } |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 184 | |
| 185 | /* Check if the skb is too large to send in one piece and fragment |
| 186 | * it if needed. |
| 187 | */ |
| 188 | if (atomic_read(&bat_priv->fragmentation) && |
| 189 | skb->len > neigh_node->if_incoming->net_dev->mtu) { |
| 190 | /* Fragment and send packet. */ |
Antonio Quartulli | f50ca95 | 2016-05-18 11:38:48 +0200 | [diff] [blame] | 191 | ret = batadv_frag_send_packet(skb, orig_node, neigh_node); |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 192 | /* skb was consumed */ |
| 193 | skb = NULL; |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 194 | |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 195 | goto put_neigh_node; |
Martin Hundebøll | ee75ed8 | 2013-05-23 16:53:03 +0200 | [diff] [blame] | 196 | } |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 197 | |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 198 | /* try to network code the packet, if it is received on an interface |
| 199 | * (i.e. being forwarded). If the packet originates from this node or if |
| 200 | * network coding fails, then send the packet as usual. |
| 201 | */ |
Antonio Quartulli | f50ca95 | 2016-05-18 11:38:48 +0200 | [diff] [blame] | 202 | if (recv_if && batadv_nc_skb_forward(skb, neigh_node)) |
Florian Westphal | 9986020 | 2016-06-11 12:46:04 +0200 | [diff] [blame] | 203 | ret = -EINPROGRESS; |
Antonio Quartulli | f50ca95 | 2016-05-18 11:38:48 +0200 | [diff] [blame] | 204 | else |
| 205 | ret = batadv_send_unicast_skb(skb, neigh_node); |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 206 | |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 207 | /* skb was consumed */ |
| 208 | skb = NULL; |
| 209 | |
| 210 | put_neigh_node: |
| 211 | batadv_neigh_node_put(neigh_node); |
| 212 | free_skb: |
| 213 | kfree_skb(skb); |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 214 | |
Martin Hundebøll | e91ecfc | 2013-04-20 13:54:39 +0200 | [diff] [blame] | 215 | return ret; |
Martin Hundebøll | bb351ba | 2012-10-16 16:13:48 +0200 | [diff] [blame] | 216 | } |
| 217 | |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 218 | /** |
| 219 | * batadv_send_skb_push_fill_unicast - extend the buffer and initialize the |
| 220 | * common fields for unicast packets |
| 221 | * @skb: the skb carrying the unicast header to initialize |
| 222 | * @hdr_size: amount of bytes to push at the beginning of the skb |
| 223 | * @orig_node: the destination node |
| 224 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 225 | * Return: false if the buffer extension was not possible or true otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 226 | */ |
| 227 | static bool |
| 228 | batadv_send_skb_push_fill_unicast(struct sk_buff *skb, int hdr_size, |
| 229 | struct batadv_orig_node *orig_node) |
| 230 | { |
| 231 | struct batadv_unicast_packet *unicast_packet; |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 232 | u8 ttvn = (u8)atomic_read(&orig_node->last_ttvn); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 233 | |
| 234 | if (batadv_skb_head_push(skb, hdr_size) < 0) |
| 235 | return false; |
| 236 | |
| 237 | unicast_packet = (struct batadv_unicast_packet *)skb->data; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 238 | unicast_packet->version = BATADV_COMPAT_VERSION; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 239 | /* batman packet type: unicast */ |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 240 | unicast_packet->packet_type = BATADV_UNICAST; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 241 | /* set unicast ttl */ |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 242 | unicast_packet->ttl = BATADV_TTL; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 243 | /* copy the destination for faster routing */ |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 244 | ether_addr_copy(unicast_packet->dest, orig_node->orig); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 245 | /* set the destination tt version number */ |
| 246 | unicast_packet->ttvn = ttvn; |
| 247 | |
| 248 | return true; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * batadv_send_skb_prepare_unicast - encapsulate an skb with a unicast header |
| 253 | * @skb: the skb containing the payload to encapsulate |
| 254 | * @orig_node: the destination node |
| 255 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 256 | * Return: false if the payload could not be encapsulated or true otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 257 | */ |
| 258 | static bool batadv_send_skb_prepare_unicast(struct sk_buff *skb, |
| 259 | struct batadv_orig_node *orig_node) |
| 260 | { |
| 261 | size_t uni_size = sizeof(struct batadv_unicast_packet); |
| 262 | |
| 263 | return batadv_send_skb_push_fill_unicast(skb, uni_size, orig_node); |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * batadv_send_skb_prepare_unicast_4addr - encapsulate an skb with a |
| 268 | * unicast 4addr header |
| 269 | * @bat_priv: the bat priv with all the soft interface information |
| 270 | * @skb: the skb containing the payload to encapsulate |
Sven Eckelmann | e51f039 | 2015-09-06 21:38:51 +0200 | [diff] [blame] | 271 | * @orig: the destination node |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 272 | * @packet_subtype: the unicast 4addr packet subtype to use |
| 273 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 274 | * Return: false if the payload could not be encapsulated or true otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 275 | */ |
| 276 | bool batadv_send_skb_prepare_unicast_4addr(struct batadv_priv *bat_priv, |
| 277 | struct sk_buff *skb, |
| 278 | struct batadv_orig_node *orig, |
| 279 | int packet_subtype) |
| 280 | { |
| 281 | struct batadv_hard_iface *primary_if; |
| 282 | struct batadv_unicast_4addr_packet *uc_4addr_packet; |
| 283 | bool ret = false; |
| 284 | |
| 285 | primary_if = batadv_primary_if_get_selected(bat_priv); |
| 286 | if (!primary_if) |
| 287 | goto out; |
| 288 | |
| 289 | /* Pull the header space and fill the unicast_packet substructure. |
| 290 | * We can do that because the first member of the uc_4addr_packet |
| 291 | * is of type struct unicast_packet |
| 292 | */ |
| 293 | if (!batadv_send_skb_push_fill_unicast(skb, sizeof(*uc_4addr_packet), |
| 294 | orig)) |
| 295 | goto out; |
| 296 | |
| 297 | uc_4addr_packet = (struct batadv_unicast_4addr_packet *)skb->data; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 298 | uc_4addr_packet->u.packet_type = BATADV_UNICAST_4ADDR; |
Antonio Quartulli | 8fdd015 | 2014-01-22 00:42:11 +0100 | [diff] [blame] | 299 | ether_addr_copy(uc_4addr_packet->src, primary_if->net_dev->dev_addr); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 300 | uc_4addr_packet->subtype = packet_subtype; |
| 301 | uc_4addr_packet->reserved = 0; |
| 302 | |
| 303 | ret = true; |
| 304 | out: |
| 305 | if (primary_if) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 306 | batadv_hardif_put(primary_if); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 307 | return ret; |
| 308 | } |
| 309 | |
| 310 | /** |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 311 | * batadv_send_skb_unicast - encapsulate and send an skb via unicast |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 312 | * @bat_priv: the bat priv with all the soft interface information |
| 313 | * @skb: payload to send |
| 314 | * @packet_type: the batman unicast packet type to use |
| 315 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast |
| 316 | * 4addr packets) |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 317 | * @orig_node: the originator to send the packet to |
Antonio Quartulli | c018ad3 | 2013-06-04 12:11:39 +0200 | [diff] [blame] | 318 | * @vid: the vid to be used to search the translation table |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 319 | * |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 320 | * Wrap the given skb into a batman-adv unicast or unicast-4addr header |
| 321 | * depending on whether BATADV_UNICAST or BATADV_UNICAST_4ADDR was supplied |
Sven Eckelmann | f19dc77 | 2016-06-27 08:15:42 +0200 | [diff] [blame] | 322 | * as packet_type. Then send this frame to the given orig_node. |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 323 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 324 | * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 325 | */ |
Linus Lüssing | 1d8ab8d | 2014-02-15 17:47:52 +0100 | [diff] [blame] | 326 | int batadv_send_skb_unicast(struct batadv_priv *bat_priv, |
| 327 | struct sk_buff *skb, int packet_type, |
| 328 | int packet_subtype, |
| 329 | struct batadv_orig_node *orig_node, |
| 330 | unsigned short vid) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 331 | { |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 332 | struct batadv_unicast_packet *unicast_packet; |
Antonio Quartulli | 8ea64e2 | 2015-05-11 20:34:52 +0200 | [diff] [blame] | 333 | struct ethhdr *ethhdr; |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 334 | int ret = NET_XMIT_DROP; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 335 | |
Simon Wunderlich | 56a5ca8 | 2013-05-28 11:49:47 +0200 | [diff] [blame] | 336 | if (!orig_node) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 337 | goto out; |
| 338 | |
| 339 | switch (packet_type) { |
| 340 | case BATADV_UNICAST: |
Antonio Quartulli | 33faa04 | 2013-10-19 14:06:05 +0200 | [diff] [blame] | 341 | if (!batadv_send_skb_prepare_unicast(skb, orig_node)) |
| 342 | goto out; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 343 | break; |
| 344 | case BATADV_UNICAST_4ADDR: |
Antonio Quartulli | 33faa04 | 2013-10-19 14:06:05 +0200 | [diff] [blame] | 345 | if (!batadv_send_skb_prepare_unicast_4addr(bat_priv, skb, |
| 346 | orig_node, |
| 347 | packet_subtype)) |
| 348 | goto out; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 349 | break; |
| 350 | default: |
| 351 | /* this function supports UNICAST and UNICAST_4ADDR only. It |
| 352 | * should never be invoked with any other packet type |
| 353 | */ |
| 354 | goto out; |
| 355 | } |
| 356 | |
Linus Lüssing | 927c2ed | 2014-01-19 22:22:45 +0100 | [diff] [blame] | 357 | /* skb->data might have been reallocated by |
| 358 | * batadv_send_skb_prepare_unicast{,_4addr}() |
| 359 | */ |
| 360 | ethhdr = eth_hdr(skb); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 361 | unicast_packet = (struct batadv_unicast_packet *)skb->data; |
| 362 | |
| 363 | /* inform the destination node that we are still missing a correct route |
| 364 | * for this client. The destination will receive this packet and will |
| 365 | * try to reroute it because the ttvn contained in the header is less |
| 366 | * than the current one |
| 367 | */ |
Antonio Quartulli | c018ad3 | 2013-06-04 12:11:39 +0200 | [diff] [blame] | 368 | if (batadv_tt_global_client_is_roaming(bat_priv, ethhdr->h_dest, vid)) |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 369 | unicast_packet->ttvn = unicast_packet->ttvn - 1; |
| 370 | |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 371 | ret = batadv_send_skb_to_orig(skb, orig_node, NULL); |
| 372 | /* skb was consumed */ |
| 373 | skb = NULL; |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 374 | |
| 375 | out: |
Sven Eckelmann | 1ad5bcb | 2016-07-17 21:04:03 +0200 | [diff] [blame] | 376 | kfree_skb(skb); |
Martin Hundebøll | f097e25 | 2013-05-23 16:53:01 +0200 | [diff] [blame] | 377 | return ret; |
| 378 | } |
| 379 | |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 380 | /** |
| 381 | * batadv_send_skb_via_tt_generic - send an skb via TT lookup |
| 382 | * @bat_priv: the bat priv with all the soft interface information |
| 383 | * @skb: payload to send |
| 384 | * @packet_type: the batman unicast packet type to use |
| 385 | * @packet_subtype: the unicast 4addr packet subtype (only relevant for unicast |
| 386 | * 4addr packets) |
Antonio Quartulli | c5d3a65 | 2014-02-15 11:58:01 +0100 | [diff] [blame] | 387 | * @dst_hint: can be used to override the destination contained in the skb |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 388 | * @vid: the vid to be used to search the translation table |
| 389 | * |
| 390 | * Look up the recipient node for the destination address in the ethernet |
| 391 | * header via the translation table. Wrap the given skb into a batman-adv |
| 392 | * unicast or unicast-4addr header depending on whether BATADV_UNICAST or |
| 393 | * BATADV_UNICAST_4ADDR was supplied as packet_type. Then send this frame |
| 394 | * to the according destination node. |
| 395 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 396 | * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 397 | */ |
| 398 | int batadv_send_skb_via_tt_generic(struct batadv_priv *bat_priv, |
| 399 | struct sk_buff *skb, int packet_type, |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 400 | int packet_subtype, u8 *dst_hint, |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 401 | unsigned short vid) |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 402 | { |
| 403 | struct ethhdr *ethhdr = (struct ethhdr *)skb->data; |
| 404 | struct batadv_orig_node *orig_node; |
Sven Eckelmann | 6b5e971 | 2015-05-26 18:34:26 +0200 | [diff] [blame] | 405 | u8 *src, *dst; |
Sven Eckelmann | f19dc77 | 2016-06-27 08:15:42 +0200 | [diff] [blame] | 406 | int ret; |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 407 | |
Antonio Quartulli | 6c413b1 | 2013-11-05 19:31:08 +0100 | [diff] [blame] | 408 | src = ethhdr->h_source; |
| 409 | dst = ethhdr->h_dest; |
| 410 | |
| 411 | /* if we got an hint! let's send the packet to this client (if any) */ |
| 412 | if (dst_hint) { |
| 413 | src = NULL; |
| 414 | dst = dst_hint; |
| 415 | } |
| 416 | orig_node = batadv_transtable_search(bat_priv, src, dst, vid); |
| 417 | |
Sven Eckelmann | f19dc77 | 2016-06-27 08:15:42 +0200 | [diff] [blame] | 418 | ret = batadv_send_skb_unicast(bat_priv, skb, packet_type, |
| 419 | packet_subtype, orig_node, vid); |
| 420 | |
| 421 | if (orig_node) |
| 422 | batadv_orig_node_put(orig_node); |
| 423 | |
| 424 | return ret; |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | /** |
| 428 | * batadv_send_skb_via_gw - send an skb via gateway lookup |
| 429 | * @bat_priv: the bat priv with all the soft interface information |
| 430 | * @skb: payload to send |
| 431 | * @vid: the vid to be used to search the translation table |
| 432 | * |
| 433 | * Look up the currently selected gateway. Wrap the given skb into a batman-adv |
| 434 | * unicast header and send this frame to this gateway node. |
| 435 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 436 | * Return: NET_XMIT_DROP in case of error or NET_XMIT_SUCCESS otherwise. |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 437 | */ |
| 438 | int batadv_send_skb_via_gw(struct batadv_priv *bat_priv, struct sk_buff *skb, |
| 439 | unsigned short vid) |
| 440 | { |
| 441 | struct batadv_orig_node *orig_node; |
Sven Eckelmann | f19dc77 | 2016-06-27 08:15:42 +0200 | [diff] [blame] | 442 | int ret; |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 443 | |
| 444 | orig_node = batadv_gw_get_selected_orig(bat_priv); |
Sven Eckelmann | f19dc77 | 2016-06-27 08:15:42 +0200 | [diff] [blame] | 445 | ret = batadv_send_skb_unicast(bat_priv, skb, BATADV_UNICAST_4ADDR, |
| 446 | BATADV_P_DATA, orig_node, vid); |
| 447 | |
| 448 | if (orig_node) |
| 449 | batadv_orig_node_put(orig_node); |
| 450 | |
| 451 | return ret; |
Linus Lüssing | e300d31 | 2013-07-03 10:40:00 +0200 | [diff] [blame] | 452 | } |
| 453 | |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 454 | /** |
| 455 | * batadv_forw_packet_free - free a forwarding packet |
| 456 | * @forw_packet: The packet to free |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 457 | * @dropped: whether the packet is freed because is is dropped |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 458 | * |
| 459 | * This frees a forwarding packet and releases any resources it might |
| 460 | * have claimed. |
| 461 | */ |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 462 | void batadv_forw_packet_free(struct batadv_forw_packet *forw_packet, |
| 463 | bool dropped) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 464 | { |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 465 | if (dropped) |
| 466 | kfree_skb(forw_packet->skb); |
| 467 | else |
| 468 | consume_skb(forw_packet->skb); |
| 469 | |
Sven Eckelmann | 6d5808d | 2011-05-11 20:59:06 +0200 | [diff] [blame] | 470 | if (forw_packet->if_incoming) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 471 | batadv_hardif_put(forw_packet->if_incoming); |
Simon Wunderlich | ef0a937 | 2013-11-13 19:14:49 +0100 | [diff] [blame] | 472 | if (forw_packet->if_outgoing) |
Sven Eckelmann | 82047ad | 2016-01-17 11:01:10 +0100 | [diff] [blame] | 473 | batadv_hardif_put(forw_packet->if_outgoing); |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 474 | if (forw_packet->queue_left) |
| 475 | atomic_inc(forw_packet->queue_left); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 476 | kfree(forw_packet); |
| 477 | } |
| 478 | |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 479 | /** |
| 480 | * batadv_forw_packet_alloc - allocate a forwarding packet |
| 481 | * @if_incoming: The (optional) if_incoming to be grabbed |
| 482 | * @if_outgoing: The (optional) if_outgoing to be grabbed |
| 483 | * @queue_left: The (optional) queue counter to decrease |
| 484 | * @bat_priv: The bat_priv for the mesh of this forw_packet |
Linus Lüssing | 99ba18e | 2017-02-17 11:17:06 +0100 | [diff] [blame] | 485 | * @skb: The raw packet this forwarding packet shall contain |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 486 | * |
| 487 | * Allocates a forwarding packet and tries to get a reference to the |
| 488 | * (optional) if_incoming, if_outgoing and queue_left. If queue_left |
| 489 | * is NULL then bat_priv is optional, too. |
| 490 | * |
| 491 | * Return: An allocated forwarding packet on success, NULL otherwise. |
| 492 | */ |
| 493 | struct batadv_forw_packet * |
| 494 | batadv_forw_packet_alloc(struct batadv_hard_iface *if_incoming, |
| 495 | struct batadv_hard_iface *if_outgoing, |
| 496 | atomic_t *queue_left, |
Linus Lüssing | 99ba18e | 2017-02-17 11:17:06 +0100 | [diff] [blame] | 497 | struct batadv_priv *bat_priv, |
| 498 | struct sk_buff *skb) |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 499 | { |
| 500 | struct batadv_forw_packet *forw_packet; |
| 501 | const char *qname; |
| 502 | |
| 503 | if (queue_left && !batadv_atomic_dec_not_zero(queue_left)) { |
| 504 | qname = "unknown"; |
| 505 | |
| 506 | if (queue_left == &bat_priv->bcast_queue_left) |
| 507 | qname = "bcast"; |
| 508 | |
| 509 | if (queue_left == &bat_priv->batman_queue_left) |
| 510 | qname = "batman"; |
| 511 | |
| 512 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
| 513 | "%s queue is full\n", qname); |
| 514 | |
| 515 | return NULL; |
| 516 | } |
| 517 | |
| 518 | forw_packet = kmalloc(sizeof(*forw_packet), GFP_ATOMIC); |
| 519 | if (!forw_packet) |
| 520 | goto err; |
| 521 | |
| 522 | if (if_incoming) |
| 523 | kref_get(&if_incoming->refcount); |
| 524 | |
| 525 | if (if_outgoing) |
| 526 | kref_get(&if_outgoing->refcount); |
| 527 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 528 | INIT_HLIST_NODE(&forw_packet->list); |
| 529 | INIT_HLIST_NODE(&forw_packet->cleanup_list); |
Linus Lüssing | 99ba18e | 2017-02-17 11:17:06 +0100 | [diff] [blame] | 530 | forw_packet->skb = skb; |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 531 | forw_packet->queue_left = queue_left; |
| 532 | forw_packet->if_incoming = if_incoming; |
| 533 | forw_packet->if_outgoing = if_outgoing; |
| 534 | forw_packet->num_packets = 0; |
| 535 | |
| 536 | return forw_packet; |
| 537 | |
| 538 | err: |
| 539 | if (queue_left) |
| 540 | atomic_inc(queue_left); |
| 541 | |
| 542 | return NULL; |
| 543 | } |
| 544 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 545 | /** |
| 546 | * batadv_forw_packet_was_stolen - check whether someone stole this packet |
| 547 | * @forw_packet: the forwarding packet to check |
| 548 | * |
| 549 | * This function checks whether the given forwarding packet was claimed by |
| 550 | * someone else for free(). |
| 551 | * |
| 552 | * Return: True if someone stole it, false otherwise. |
| 553 | */ |
| 554 | static bool |
| 555 | batadv_forw_packet_was_stolen(struct batadv_forw_packet *forw_packet) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 556 | { |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 557 | return !hlist_unhashed(&forw_packet->cleanup_list); |
| 558 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 559 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 560 | /** |
| 561 | * batadv_forw_packet_steal - claim a forw_packet for free() |
| 562 | * @forw_packet: the forwarding packet to steal |
| 563 | * @lock: a key to the store to steal from (e.g. forw_{bat,bcast}_list_lock) |
| 564 | * |
| 565 | * This function tries to steal a specific forw_packet from global |
| 566 | * visibility for the purpose of getting it for free(). That means |
| 567 | * the caller is *not* allowed to requeue it afterwards. |
| 568 | * |
| 569 | * Return: True if stealing was successful. False if someone else stole it |
| 570 | * before us. |
| 571 | */ |
| 572 | bool batadv_forw_packet_steal(struct batadv_forw_packet *forw_packet, |
| 573 | spinlock_t *lock) |
| 574 | { |
| 575 | /* did purging routine steal it earlier? */ |
| 576 | spin_lock_bh(lock); |
| 577 | if (batadv_forw_packet_was_stolen(forw_packet)) { |
| 578 | spin_unlock_bh(lock); |
| 579 | return false; |
| 580 | } |
| 581 | |
| 582 | hlist_del_init(&forw_packet->list); |
| 583 | |
| 584 | /* Just to spot misuse of this function */ |
| 585 | hlist_add_fake(&forw_packet->cleanup_list); |
| 586 | |
| 587 | spin_unlock_bh(lock); |
| 588 | return true; |
| 589 | } |
| 590 | |
| 591 | /** |
| 592 | * batadv_forw_packet_list_steal - claim a list of forward packets for free() |
| 593 | * @forw_list: the to be stolen forward packets |
| 594 | * @cleanup_list: a backup pointer, to be able to dispose the packet later |
| 595 | * @hard_iface: the interface to steal forward packets from |
| 596 | * |
| 597 | * This function claims responsibility to free any forw_packet queued on the |
| 598 | * given hard_iface. If hard_iface is NULL forwarding packets on all hard |
| 599 | * interfaces will be claimed. |
| 600 | * |
| 601 | * The packets are being moved from the forw_list to the cleanup_list and |
| 602 | * by that allows already running threads to notice the claiming. |
| 603 | */ |
| 604 | static void |
| 605 | batadv_forw_packet_list_steal(struct hlist_head *forw_list, |
| 606 | struct hlist_head *cleanup_list, |
| 607 | const struct batadv_hard_iface *hard_iface) |
| 608 | { |
| 609 | struct batadv_forw_packet *forw_packet; |
| 610 | struct hlist_node *safe_tmp_node; |
| 611 | |
| 612 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, |
| 613 | forw_list, list) { |
| 614 | /* if purge_outstanding_packets() was called with an argument |
| 615 | * we delete only packets belonging to the given interface |
| 616 | */ |
| 617 | if (hard_iface && |
| 618 | (forw_packet->if_incoming != hard_iface) && |
| 619 | (forw_packet->if_outgoing != hard_iface)) |
| 620 | continue; |
| 621 | |
| 622 | hlist_del(&forw_packet->list); |
| 623 | hlist_add_head(&forw_packet->cleanup_list, cleanup_list); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | /** |
| 628 | * batadv_forw_packet_list_free - free a list of forward packets |
| 629 | * @head: a list of to be freed forw_packets |
| 630 | * |
| 631 | * This function cancels the scheduling of any packet in the provided list, |
| 632 | * waits for any possibly running packet forwarding thread to finish and |
| 633 | * finally, safely frees this forward packet. |
| 634 | * |
| 635 | * This function might sleep. |
| 636 | */ |
| 637 | static void batadv_forw_packet_list_free(struct hlist_head *head) |
| 638 | { |
| 639 | struct batadv_forw_packet *forw_packet; |
| 640 | struct hlist_node *safe_tmp_node; |
| 641 | |
| 642 | hlist_for_each_entry_safe(forw_packet, safe_tmp_node, head, |
| 643 | cleanup_list) { |
| 644 | cancel_delayed_work_sync(&forw_packet->delayed_work); |
| 645 | |
| 646 | hlist_del(&forw_packet->cleanup_list); |
| 647 | batadv_forw_packet_free(forw_packet, true); |
| 648 | } |
| 649 | } |
| 650 | |
| 651 | /** |
| 652 | * batadv_forw_packet_queue - try to queue a forwarding packet |
| 653 | * @forw_packet: the forwarding packet to queue |
| 654 | * @lock: a key to the store (e.g. forw_{bat,bcast}_list_lock) |
| 655 | * @head: the shelve to queue it on (e.g. forw_{bat,bcast}_list) |
| 656 | * @send_time: timestamp (jiffies) when the packet is to be sent |
| 657 | * |
| 658 | * This function tries to (re)queue a forwarding packet. Requeuing |
| 659 | * is prevented if the according interface is shutting down |
| 660 | * (e.g. if batadv_forw_packet_list_steal() was called for this |
| 661 | * packet earlier). |
| 662 | * |
| 663 | * Calling batadv_forw_packet_queue() after a call to |
| 664 | * batadv_forw_packet_steal() is forbidden! |
| 665 | * |
| 666 | * Caller needs to ensure that forw_packet->delayed_work was initialized. |
| 667 | */ |
| 668 | static void batadv_forw_packet_queue(struct batadv_forw_packet *forw_packet, |
| 669 | spinlock_t *lock, struct hlist_head *head, |
| 670 | unsigned long send_time) |
| 671 | { |
| 672 | spin_lock_bh(lock); |
| 673 | |
| 674 | /* did purging routine steal it from us? */ |
| 675 | if (batadv_forw_packet_was_stolen(forw_packet)) { |
| 676 | /* If you got it for free() without trouble, then |
| 677 | * don't get back into the queue after stealing... |
| 678 | */ |
| 679 | WARN_ONCE(hlist_fake(&forw_packet->cleanup_list), |
| 680 | "Requeuing after batadv_forw_packet_steal() not allowed!\n"); |
| 681 | |
| 682 | spin_unlock_bh(lock); |
| 683 | return; |
| 684 | } |
| 685 | |
| 686 | hlist_del_init(&forw_packet->list); |
| 687 | hlist_add_head(&forw_packet->list, head); |
| 688 | |
| 689 | queue_delayed_work(batadv_event_workqueue, |
| 690 | &forw_packet->delayed_work, |
| 691 | send_time - jiffies); |
| 692 | spin_unlock_bh(lock); |
| 693 | } |
| 694 | |
| 695 | /** |
| 696 | * batadv_forw_packet_bcast_queue - try to queue a broadcast packet |
| 697 | * @bat_priv: the bat priv with all the soft interface information |
| 698 | * @forw_packet: the forwarding packet to queue |
| 699 | * @send_time: timestamp (jiffies) when the packet is to be sent |
| 700 | * |
| 701 | * This function tries to (re)queue a broadcast packet. |
| 702 | * |
| 703 | * Caller needs to ensure that forw_packet->delayed_work was initialized. |
| 704 | */ |
| 705 | static void |
| 706 | batadv_forw_packet_bcast_queue(struct batadv_priv *bat_priv, |
| 707 | struct batadv_forw_packet *forw_packet, |
| 708 | unsigned long send_time) |
| 709 | { |
| 710 | batadv_forw_packet_queue(forw_packet, &bat_priv->forw_bcast_list_lock, |
| 711 | &bat_priv->forw_bcast_list, send_time); |
| 712 | } |
| 713 | |
| 714 | /** |
| 715 | * batadv_forw_packet_ogmv1_queue - try to queue an OGMv1 packet |
| 716 | * @bat_priv: the bat priv with all the soft interface information |
| 717 | * @forw_packet: the forwarding packet to queue |
| 718 | * @send_time: timestamp (jiffies) when the packet is to be sent |
| 719 | * |
| 720 | * This function tries to (re)queue an OGMv1 packet. |
| 721 | * |
| 722 | * Caller needs to ensure that forw_packet->delayed_work was initialized. |
| 723 | */ |
| 724 | void batadv_forw_packet_ogmv1_queue(struct batadv_priv *bat_priv, |
| 725 | struct batadv_forw_packet *forw_packet, |
| 726 | unsigned long send_time) |
| 727 | { |
| 728 | batadv_forw_packet_queue(forw_packet, &bat_priv->forw_bat_list_lock, |
| 729 | &bat_priv->forw_bat_list, send_time); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 730 | } |
| 731 | |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 732 | /** |
Sven Eckelmann | 7afcbbe | 2015-10-31 12:29:29 +0100 | [diff] [blame] | 733 | * batadv_add_bcast_packet_to_list - queue broadcast packet for multiple sends |
| 734 | * @bat_priv: the bat priv with all the soft interface information |
| 735 | * @skb: broadcast packet to add |
| 736 | * @delay: number of jiffies to wait before sending |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 737 | * @own_packet: true if it is a self-generated broadcast packet |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 738 | * |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 739 | * add a broadcast packet to the queue and setup timers. broadcast packets |
| 740 | * are sent multiple times to increase probability for being received. |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 741 | * |
| 742 | * The skb is not consumed, so the caller should make sure that the |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 743 | * skb is freed. |
Sven Eckelmann | 62fe710 | 2015-09-15 19:00:48 +0200 | [diff] [blame] | 744 | * |
| 745 | * Return: NETDEV_TX_OK on success and NETDEV_TX_BUSY on errors. |
Sven Eckelmann | 9cfc7bd | 2012-05-12 02:09:43 +0200 | [diff] [blame] | 746 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 747 | int batadv_add_bcast_packet_to_list(struct batadv_priv *bat_priv, |
Sven Eckelmann | 9455e34 | 2012-05-12 02:09:37 +0200 | [diff] [blame] | 748 | const struct sk_buff *skb, |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 749 | unsigned long delay, |
| 750 | bool own_packet) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 751 | { |
Sven Eckelmann | 422d2f7 | 2016-07-25 00:42:44 +0200 | [diff] [blame] | 752 | struct batadv_hard_iface *primary_if; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 753 | struct batadv_forw_packet *forw_packet; |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 754 | struct batadv_bcast_packet *bcast_packet; |
Sven Eckelmann | 747e422 | 2011-05-14 23:14:50 +0200 | [diff] [blame] | 755 | struct sk_buff *newskb; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 756 | |
Sven Eckelmann | e5d8925 | 2012-05-12 13:48:54 +0200 | [diff] [blame] | 757 | primary_if = batadv_primary_if_get_selected(bat_priv); |
Marek Lindner | 32ae9b2 | 2011-04-20 15:40:58 +0200 | [diff] [blame] | 758 | if (!primary_if) |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 759 | goto err; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 760 | |
Linus Lüssing | 99ba18e | 2017-02-17 11:17:06 +0100 | [diff] [blame] | 761 | newskb = skb_copy(skb, GFP_ATOMIC); |
| 762 | if (!newskb) { |
| 763 | batadv_hardif_put(primary_if); |
| 764 | goto err; |
| 765 | } |
| 766 | |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 767 | forw_packet = batadv_forw_packet_alloc(primary_if, NULL, |
| 768 | &bat_priv->bcast_queue_left, |
Linus Lüssing | 99ba18e | 2017-02-17 11:17:06 +0100 | [diff] [blame] | 769 | bat_priv, newskb); |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 770 | batadv_hardif_put(primary_if); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 771 | if (!forw_packet) |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 772 | goto err_packet_free; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 773 | |
| 774 | /* as we have a copy now, it is safe to decrease the TTL */ |
Sven Eckelmann | 9641269 | 2012-06-05 22:31:30 +0200 | [diff] [blame] | 775 | bcast_packet = (struct batadv_bcast_packet *)newskb->data; |
Simon Wunderlich | a40d9b0 | 2013-12-02 20:38:31 +0100 | [diff] [blame] | 776 | bcast_packet->ttl--; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 777 | |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 778 | forw_packet->own = own_packet; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 779 | |
Antonio Quartulli | 7241444 | 2012-12-25 13:14:37 +0100 | [diff] [blame] | 780 | INIT_DELAYED_WORK(&forw_packet->delayed_work, |
| 781 | batadv_send_outstanding_bcast_packet); |
| 782 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 783 | batadv_forw_packet_bcast_queue(bat_priv, forw_packet, jiffies + delay); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 784 | return NETDEV_TX_OK; |
| 785 | |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 786 | err_packet_free: |
Linus Lüssing | 99ba18e | 2017-02-17 11:17:06 +0100 | [diff] [blame] | 787 | kfree_skb(newskb); |
Linus Lüssing | a65e548 | 2016-06-20 21:39:54 +0200 | [diff] [blame] | 788 | err: |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 789 | return NETDEV_TX_BUSY; |
| 790 | } |
| 791 | |
Linus Lüssing | e2d9ba4 | 2017-02-17 11:17:07 +0100 | [diff] [blame] | 792 | /** |
| 793 | * batadv_forw_packet_bcasts_left - check if a retransmission is necessary |
| 794 | * @forw_packet: the forwarding packet to check |
| 795 | * @hard_iface: the interface to check on |
| 796 | * |
| 797 | * Checks whether a given packet has any (re)transmissions left on the provided |
| 798 | * interface. |
| 799 | * |
| 800 | * hard_iface may be NULL: In that case the number of transmissions this skb had |
| 801 | * so far is compared with the maximum amount of retransmissions independent of |
| 802 | * any interface instead. |
| 803 | * |
| 804 | * Return: True if (re)transmissions are left, false otherwise. |
| 805 | */ |
| 806 | static bool |
| 807 | batadv_forw_packet_bcasts_left(struct batadv_forw_packet *forw_packet, |
| 808 | struct batadv_hard_iface *hard_iface) |
| 809 | { |
| 810 | unsigned int max; |
| 811 | |
| 812 | if (hard_iface) |
| 813 | max = hard_iface->num_bcasts; |
| 814 | else |
| 815 | max = BATADV_NUM_BCASTS_MAX; |
| 816 | |
| 817 | return BATADV_SKB_CB(forw_packet->skb)->num_bcasts < max; |
| 818 | } |
| 819 | |
| 820 | /** |
| 821 | * batadv_forw_packet_bcasts_inc - increment retransmission counter of a packet |
| 822 | * @forw_packet: the packet to increase the counter for |
| 823 | */ |
| 824 | static void |
| 825 | batadv_forw_packet_bcasts_inc(struct batadv_forw_packet *forw_packet) |
| 826 | { |
| 827 | BATADV_SKB_CB(forw_packet->skb)->num_bcasts++; |
| 828 | } |
| 829 | |
| 830 | /** |
| 831 | * batadv_forw_packet_is_rebroadcast - check packet for previous transmissions |
| 832 | * @forw_packet: the packet to check |
| 833 | * |
| 834 | * Return: True if this packet was transmitted before, false otherwise. |
| 835 | */ |
| 836 | bool batadv_forw_packet_is_rebroadcast(struct batadv_forw_packet *forw_packet) |
| 837 | { |
| 838 | return BATADV_SKB_CB(forw_packet->skb)->num_bcasts > 0; |
| 839 | } |
| 840 | |
Sven Eckelmann | bb079c8 | 2012-05-16 20:23:14 +0200 | [diff] [blame] | 841 | static void batadv_send_outstanding_bcast_packet(struct work_struct *work) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 842 | { |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 843 | struct batadv_hard_iface *hard_iface; |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 844 | struct batadv_hardif_neigh_node *neigh_node; |
Sven Eckelmann | bbb1f90 | 2012-07-08 17:13:15 +0200 | [diff] [blame] | 845 | struct delayed_work *delayed_work; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 846 | struct batadv_forw_packet *forw_packet; |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 847 | struct batadv_bcast_packet *bcast_packet; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 848 | struct sk_buff *skb1; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 849 | struct net_device *soft_iface; |
| 850 | struct batadv_priv *bat_priv; |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 851 | unsigned long send_time = jiffies + msecs_to_jiffies(5); |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 852 | bool dropped = false; |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 853 | u8 *neigh_addr; |
| 854 | u8 *orig_neigh; |
| 855 | int ret = 0; |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 856 | |
Geliang Tang | 4ba4bc0 | 2015-12-28 23:43:37 +0800 | [diff] [blame] | 857 | delayed_work = to_delayed_work(work); |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 858 | forw_packet = container_of(delayed_work, struct batadv_forw_packet, |
| 859 | delayed_work); |
| 860 | soft_iface = forw_packet->if_incoming->soft_iface; |
| 861 | bat_priv = netdev_priv(soft_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 862 | |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 863 | if (atomic_read(&bat_priv->mesh_state) == BATADV_MESH_DEACTIVATING) { |
| 864 | dropped = true; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 865 | goto out; |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 866 | } |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 867 | |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 868 | if (batadv_dat_drop_broadcast_packet(bat_priv, forw_packet)) { |
| 869 | dropped = true; |
Antonio Quartulli | c384ea3 | 2011-06-26 03:37:18 +0200 | [diff] [blame] | 870 | goto out; |
Sven Eckelmann | bd687fe | 2016-07-17 21:04:00 +0200 | [diff] [blame] | 871 | } |
Antonio Quartulli | c384ea3 | 2011-06-26 03:37:18 +0200 | [diff] [blame] | 872 | |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 873 | bcast_packet = (struct batadv_bcast_packet *)forw_packet->skb->data; |
| 874 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 875 | /* rebroadcast packet */ |
| 876 | rcu_read_lock(); |
Sven Eckelmann | 3193e8f | 2012-05-12 02:09:42 +0200 | [diff] [blame] | 877 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 878 | if (hard_iface->soft_iface != soft_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 879 | continue; |
| 880 | |
Linus Lüssing | e2d9ba4 | 2017-02-17 11:17:07 +0100 | [diff] [blame] | 881 | if (!batadv_forw_packet_bcasts_left(forw_packet, hard_iface)) |
Matthias Schiffer | caf65bf | 2013-03-09 23:14:23 +0100 | [diff] [blame] | 882 | continue; |
| 883 | |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 884 | if (forw_packet->own) { |
| 885 | neigh_node = NULL; |
| 886 | } else { |
| 887 | neigh_addr = eth_hdr(forw_packet->skb)->h_source; |
| 888 | neigh_node = batadv_hardif_neigh_get(hard_iface, |
| 889 | neigh_addr); |
| 890 | } |
| 891 | |
| 892 | orig_neigh = neigh_node ? neigh_node->orig : NULL; |
| 893 | |
| 894 | ret = batadv_hardif_no_broadcast(hard_iface, bcast_packet->orig, |
| 895 | orig_neigh); |
| 896 | |
| 897 | if (ret) { |
| 898 | char *type; |
| 899 | |
| 900 | switch (ret) { |
| 901 | case BATADV_HARDIF_BCAST_NORECIPIENT: |
| 902 | type = "no neighbor"; |
| 903 | break; |
| 904 | case BATADV_HARDIF_BCAST_DUPFWD: |
| 905 | type = "single neighbor is source"; |
| 906 | break; |
| 907 | case BATADV_HARDIF_BCAST_DUPORIG: |
| 908 | type = "single neighbor is originator"; |
| 909 | break; |
| 910 | default: |
| 911 | type = "unknown"; |
| 912 | } |
| 913 | |
Colin Ian King | f25cbb2 | 2017-06-26 11:26:44 +0100 | [diff] [blame] | 914 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "BCAST packet from orig %pM on %s suppressed: %s\n", |
Linus Lüssing | 3111bee | 2016-08-07 12:34:19 +0200 | [diff] [blame] | 915 | bcast_packet->orig, |
| 916 | hard_iface->net_dev->name, type); |
| 917 | |
| 918 | if (neigh_node) |
| 919 | batadv_hardif_neigh_put(neigh_node); |
| 920 | |
| 921 | continue; |
| 922 | } |
| 923 | |
| 924 | if (neigh_node) |
| 925 | batadv_hardif_neigh_put(neigh_node); |
| 926 | |
Sven Eckelmann | 2735344 | 2016-03-05 16:09:16 +0100 | [diff] [blame] | 927 | if (!kref_get_unless_zero(&hard_iface->refcount)) |
| 928 | continue; |
| 929 | |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 930 | /* send a copy of the saved skb */ |
| 931 | skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC); |
| 932 | if (skb1) |
Antonio Quartulli | 95d3927 | 2016-01-16 16:40:15 +0800 | [diff] [blame] | 933 | batadv_send_broadcast_skb(skb1, hard_iface); |
Sven Eckelmann | 2735344 | 2016-03-05 16:09:16 +0100 | [diff] [blame] | 934 | |
| 935 | batadv_hardif_put(hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 936 | } |
| 937 | rcu_read_unlock(); |
| 938 | |
Linus Lüssing | e2d9ba4 | 2017-02-17 11:17:07 +0100 | [diff] [blame] | 939 | batadv_forw_packet_bcasts_inc(forw_packet); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 940 | |
| 941 | /* if we still have some more bcasts to send */ |
Linus Lüssing | e2d9ba4 | 2017-02-17 11:17:07 +0100 | [diff] [blame] | 942 | if (batadv_forw_packet_bcasts_left(forw_packet, NULL)) { |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 943 | batadv_forw_packet_bcast_queue(bat_priv, forw_packet, |
| 944 | send_time); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 945 | return; |
| 946 | } |
| 947 | |
| 948 | out: |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 949 | /* do we get something for free()? */ |
| 950 | if (batadv_forw_packet_steal(forw_packet, |
| 951 | &bat_priv->forw_bcast_list_lock)) |
| 952 | batadv_forw_packet_free(forw_packet, dropped); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 953 | } |
| 954 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 955 | /** |
| 956 | * batadv_purge_outstanding_packets - stop/purge scheduled bcast/OGMv1 packets |
| 957 | * @bat_priv: the bat priv with all the soft interface information |
| 958 | * @hard_iface: the hard interface to cancel and purge bcast/ogm packets on |
| 959 | * |
| 960 | * This method cancels and purges any broadcast and OGMv1 packet on the given |
| 961 | * hard_iface. If hard_iface is NULL, broadcast and OGMv1 packets on all hard |
| 962 | * interfaces will be canceled and purged. |
| 963 | * |
| 964 | * This function might sleep. |
| 965 | */ |
Sven Eckelmann | 56303d3 | 2012-06-05 22:31:31 +0200 | [diff] [blame] | 966 | void |
| 967 | batadv_purge_outstanding_packets(struct batadv_priv *bat_priv, |
| 968 | const struct batadv_hard_iface *hard_iface) |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 969 | { |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 970 | struct hlist_head head = HLIST_HEAD_INIT; |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 971 | |
Marek Lindner | e6c10f4 | 2011-02-18 12:33:20 +0000 | [diff] [blame] | 972 | if (hard_iface) |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 973 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 22f0502 | 2017-05-19 13:02:00 +0200 | [diff] [blame] | 974 | "%s(): %s\n", |
| 975 | __func__, hard_iface->net_dev->name); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 976 | else |
Sven Eckelmann | 39c75a5 | 2012-06-03 22:19:22 +0200 | [diff] [blame] | 977 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
Sven Eckelmann | 22f0502 | 2017-05-19 13:02:00 +0200 | [diff] [blame] | 978 | "%s()\n", __func__); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 979 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 980 | /* claim bcast list for free() */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 981 | spin_lock_bh(&bat_priv->forw_bcast_list_lock); |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 982 | batadv_forw_packet_list_steal(&bat_priv->forw_bcast_list, &head, |
| 983 | hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 984 | spin_unlock_bh(&bat_priv->forw_bcast_list_lock); |
| 985 | |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 986 | /* claim batman packet list for free() */ |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 987 | spin_lock_bh(&bat_priv->forw_bat_list_lock); |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 988 | batadv_forw_packet_list_steal(&bat_priv->forw_bat_list, &head, |
| 989 | hard_iface); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 990 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
Linus Lüssing | 9b4aec6 | 2016-11-01 09:44:44 +0100 | [diff] [blame] | 991 | |
| 992 | /* then cancel or wait for packet workers to finish and free */ |
| 993 | batadv_forw_packet_list_free(&head); |
Sven Eckelmann | c6c8fea | 2010-12-13 11:19:28 +0000 | [diff] [blame] | 994 | } |