Masahiro Yamada | d77cd7f | 2020-04-03 16:37:41 +0900 | [diff] [blame] | 1 | // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) |
Marc Kleine-Budde | d6ada83 | 2019-07-24 14:16:29 +0200 | [diff] [blame] | 2 | /* raw.c - Raw sockets for protocol family CAN |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 3 | * |
| 4 | * Copyright (c) 2002-2007 Volkswagen Group Electronic Research |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions |
| 9 | * are met: |
| 10 | * 1. Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * 3. Neither the name of Volkswagen nor the names of its contributors |
| 16 | * may be used to endorse or promote products derived from this software |
| 17 | * without specific prior written permission. |
| 18 | * |
| 19 | * Alternatively, provided that this notice is retained in full, this |
| 20 | * software may be distributed under the terms of the GNU General |
| 21 | * Public License ("GPL") version 2, in which case the provisions of the |
| 22 | * GPL apply INSTEAD OF those given above. |
| 23 | * |
| 24 | * The provided data structures and external interfaces from this code |
| 25 | * are not restricted to be used by modules with a GPL compatible license. |
| 26 | * |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 28 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 29 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 30 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 31 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 32 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 33 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 34 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 35 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 36 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 37 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| 38 | * DAMAGE. |
| 39 | * |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 40 | */ |
| 41 | |
| 42 | #include <linux/module.h> |
| 43 | #include <linux/init.h> |
| 44 | #include <linux/uio.h> |
| 45 | #include <linux/net.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 46 | #include <linux/slab.h> |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 47 | #include <linux/netdevice.h> |
| 48 | #include <linux/socket.h> |
| 49 | #include <linux/if_arp.h> |
| 50 | #include <linux/skbuff.h> |
| 51 | #include <linux/can.h> |
| 52 | #include <linux/can/core.h> |
Oliver Hartkopp | 156c2bb | 2013-01-17 18:43:39 +0100 | [diff] [blame] | 53 | #include <linux/can/skb.h> |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 54 | #include <linux/can/raw.h> |
| 55 | #include <net/sock.h> |
| 56 | #include <net/net_namespace.h> |
| 57 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 58 | MODULE_DESCRIPTION("PF_CAN raw protocol"); |
| 59 | MODULE_LICENSE("Dual BSD/GPL"); |
| 60 | MODULE_AUTHOR("Urs Thuermann <urs.thuermann@volkswagen.de>"); |
Lothar Waßmann | b13bb2e | 2009-07-14 23:12:25 +0000 | [diff] [blame] | 61 | MODULE_ALIAS("can-proto-1"); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 62 | |
Oliver Hartkopp | 9e97147 | 2021-03-25 13:58:48 +0100 | [diff] [blame] | 63 | #define RAW_MIN_NAMELEN CAN_REQUIRED_SIZE(struct sockaddr_can, can_ifindex) |
| 64 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 65 | #define MASK_ALL 0 |
| 66 | |
Marc Kleine-Budde | d6ada83 | 2019-07-24 14:16:29 +0200 | [diff] [blame] | 67 | /* A raw socket has a list of can_filters attached to it, each receiving |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 68 | * the CAN frames matching that filter. If the filter list is empty, |
| 69 | * no CAN frames will be received by the socket. The default after |
| 70 | * opening the socket, is to have one filter which receives all frames. |
| 71 | * The filter list is allocated dynamically with the exception of the |
| 72 | * list containing only one item. This common case is optimized by |
| 73 | * storing the single filter in dfilter, to avoid using dynamic memory. |
| 74 | */ |
| 75 | |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 76 | struct uniqframe { |
Oliver Hartkopp | d3b58c4 | 2015-06-26 11:58:19 +0200 | [diff] [blame] | 77 | int skbcnt; |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 78 | const struct sk_buff *skb; |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 79 | unsigned int join_rx_count; |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 80 | }; |
| 81 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 82 | struct raw_sock { |
| 83 | struct sock sk; |
| 84 | int bound; |
| 85 | int ifindex; |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 86 | struct list_head notifier; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 87 | int loopback; |
| 88 | int recv_own_msgs; |
Oliver Hartkopp | e2d265d | 2012-06-13 20:41:31 +0200 | [diff] [blame] | 89 | int fd_frames; |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 90 | int join_filters; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 91 | int count; /* number of active filters */ |
| 92 | struct can_filter dfilter; /* default/single filter */ |
| 93 | struct can_filter *filter; /* pointer to filter(s) */ |
| 94 | can_err_mask_t err_mask; |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 95 | struct uniqframe __percpu *uniq; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 96 | }; |
| 97 | |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 98 | static LIST_HEAD(raw_notifier_list); |
| 99 | static DEFINE_SPINLOCK(raw_notifier_lock); |
| 100 | static struct raw_sock *raw_busy_notifier; |
| 101 | |
Marc Kleine-Budde | d6ada83 | 2019-07-24 14:16:29 +0200 | [diff] [blame] | 102 | /* Return pointer to store the extra msg flags for raw_recvmsg(). |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 103 | * We use the space of one unsigned int beyond the 'struct sockaddr_can' |
| 104 | * in skb->cb. |
| 105 | */ |
| 106 | static inline unsigned int *raw_flags(struct sk_buff *skb) |
| 107 | { |
Eyal Birger | b4772ef | 2015-03-01 14:58:29 +0200 | [diff] [blame] | 108 | sock_skb_cb_check_size(sizeof(struct sockaddr_can) + |
| 109 | sizeof(unsigned int)); |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 110 | |
| 111 | /* return pointer after struct sockaddr_can */ |
| 112 | return (unsigned int *)(&((struct sockaddr_can *)skb->cb)[1]); |
| 113 | } |
| 114 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 115 | static inline struct raw_sock *raw_sk(const struct sock *sk) |
| 116 | { |
| 117 | return (struct raw_sock *)sk; |
| 118 | } |
| 119 | |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 120 | static void raw_rcv(struct sk_buff *oskb, void *data) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 121 | { |
| 122 | struct sock *sk = (struct sock *)data; |
| 123 | struct raw_sock *ro = raw_sk(sk); |
| 124 | struct sockaddr_can *addr; |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 125 | struct sk_buff *skb; |
| 126 | unsigned int *pflags; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 127 | |
Oliver Hartkopp | 1fa17d4 | 2009-01-06 11:07:54 -0800 | [diff] [blame] | 128 | /* check the received tx sock reference */ |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 129 | if (!ro->recv_own_msgs && oskb->sk == sk) |
Oliver Hartkopp | 1fa17d4 | 2009-01-06 11:07:54 -0800 | [diff] [blame] | 130 | return; |
| 131 | |
Oliver Hartkopp | 821047c | 2014-03-01 15:31:53 +0100 | [diff] [blame] | 132 | /* do not pass non-CAN2.0 frames to a legacy socket */ |
| 133 | if (!ro->fd_frames && oskb->len != CAN_MTU) |
| 134 | return; |
Oliver Hartkopp | e2d265d | 2012-06-13 20:41:31 +0200 | [diff] [blame] | 135 | |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 136 | /* eliminate multiple filter matches for the same skb */ |
| 137 | if (this_cpu_ptr(ro->uniq)->skb == oskb && |
Oliver Hartkopp | d3b58c4 | 2015-06-26 11:58:19 +0200 | [diff] [blame] | 138 | this_cpu_ptr(ro->uniq)->skbcnt == can_skb_prv(oskb)->skbcnt) { |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 139 | if (ro->join_filters) { |
| 140 | this_cpu_inc(ro->uniq->join_rx_count); |
| 141 | /* drop frame until all enabled filters matched */ |
| 142 | if (this_cpu_ptr(ro->uniq)->join_rx_count < ro->count) |
| 143 | return; |
| 144 | } else { |
| 145 | return; |
| 146 | } |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 147 | } else { |
| 148 | this_cpu_ptr(ro->uniq)->skb = oskb; |
Oliver Hartkopp | d3b58c4 | 2015-06-26 11:58:19 +0200 | [diff] [blame] | 149 | this_cpu_ptr(ro->uniq)->skbcnt = can_skb_prv(oskb)->skbcnt; |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 150 | this_cpu_ptr(ro->uniq)->join_rx_count = 1; |
| 151 | /* drop first frame to check all enabled filters? */ |
| 152 | if (ro->join_filters && ro->count > 1) |
| 153 | return; |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 154 | } |
| 155 | |
Oliver Hartkopp | 1fa17d4 | 2009-01-06 11:07:54 -0800 | [diff] [blame] | 156 | /* clone the given skb to be able to enqueue it into the rcv queue */ |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 157 | skb = skb_clone(oskb, GFP_ATOMIC); |
Oliver Hartkopp | 1fa17d4 | 2009-01-06 11:07:54 -0800 | [diff] [blame] | 158 | if (!skb) |
| 159 | return; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 160 | |
Marc Kleine-Budde | 6a54dde | 2020-09-16 00:34:56 +0200 | [diff] [blame] | 161 | /* Put the datagram to the queue so that raw_recvmsg() can get |
| 162 | * it from there. We need to pass the interface index to |
| 163 | * raw_recvmsg(). We pass a whole struct sockaddr_can in |
| 164 | * skb->cb containing the interface index. |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 165 | */ |
| 166 | |
Eyal Birger | b4772ef | 2015-03-01 14:58:29 +0200 | [diff] [blame] | 167 | sock_skb_cb_check_size(sizeof(struct sockaddr_can)); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 168 | addr = (struct sockaddr_can *)skb->cb; |
| 169 | memset(addr, 0, sizeof(*addr)); |
Marc Kleine-Budde | 6a54dde | 2020-09-16 00:34:56 +0200 | [diff] [blame] | 170 | addr->can_family = AF_CAN; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 171 | addr->can_ifindex = skb->dev->ifindex; |
| 172 | |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 173 | /* add CAN specific message flags for raw_recvmsg() */ |
| 174 | pflags = raw_flags(skb); |
| 175 | *pflags = 0; |
| 176 | if (oskb->sk) |
| 177 | *pflags |= MSG_DONTROUTE; |
| 178 | if (oskb->sk == sk) |
| 179 | *pflags |= MSG_CONFIRM; |
| 180 | |
Urs Thuermann | a219994 | 2008-02-07 18:05:04 -0800 | [diff] [blame] | 181 | if (sock_queue_rcv_skb(sk, skb) < 0) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 182 | kfree_skb(skb); |
| 183 | } |
| 184 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 185 | static int raw_enable_filters(struct net *net, struct net_device *dev, |
| 186 | struct sock *sk, struct can_filter *filter, |
| 187 | int count) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 188 | { |
| 189 | int err = 0; |
| 190 | int i; |
| 191 | |
| 192 | for (i = 0; i < count; i++) { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 193 | err = can_rx_register(net, dev, filter[i].can_id, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 194 | filter[i].can_mask, |
Eric Dumazet | f1712c7 | 2017-01-27 08:11:44 -0800 | [diff] [blame] | 195 | raw_rcv, sk, "raw", sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 196 | if (err) { |
| 197 | /* clean up successfully registered filters */ |
| 198 | while (--i >= 0) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 199 | can_rx_unregister(net, dev, filter[i].can_id, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 200 | filter[i].can_mask, |
| 201 | raw_rcv, sk); |
| 202 | break; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | return err; |
| 207 | } |
| 208 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 209 | static int raw_enable_errfilter(struct net *net, struct net_device *dev, |
| 210 | struct sock *sk, can_err_mask_t err_mask) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 211 | { |
| 212 | int err = 0; |
| 213 | |
| 214 | if (err_mask) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 215 | err = can_rx_register(net, dev, 0, err_mask | CAN_ERR_FLAG, |
Eric Dumazet | f1712c7 | 2017-01-27 08:11:44 -0800 | [diff] [blame] | 216 | raw_rcv, sk, "raw", sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 217 | |
| 218 | return err; |
| 219 | } |
| 220 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 221 | static void raw_disable_filters(struct net *net, struct net_device *dev, |
| 222 | struct sock *sk, struct can_filter *filter, |
| 223 | int count) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 224 | { |
| 225 | int i; |
| 226 | |
| 227 | for (i = 0; i < count; i++) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 228 | can_rx_unregister(net, dev, filter[i].can_id, |
| 229 | filter[i].can_mask, raw_rcv, sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 230 | } |
| 231 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 232 | static inline void raw_disable_errfilter(struct net *net, |
| 233 | struct net_device *dev, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 234 | struct sock *sk, |
| 235 | can_err_mask_t err_mask) |
| 236 | |
| 237 | { |
| 238 | if (err_mask) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 239 | can_rx_unregister(net, dev, 0, err_mask | CAN_ERR_FLAG, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 240 | raw_rcv, sk); |
| 241 | } |
| 242 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 243 | static inline void raw_disable_allfilters(struct net *net, |
| 244 | struct net_device *dev, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 245 | struct sock *sk) |
| 246 | { |
| 247 | struct raw_sock *ro = raw_sk(sk); |
| 248 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 249 | raw_disable_filters(net, dev, sk, ro->filter, ro->count); |
| 250 | raw_disable_errfilter(net, dev, sk, ro->err_mask); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 251 | } |
| 252 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 253 | static int raw_enable_allfilters(struct net *net, struct net_device *dev, |
| 254 | struct sock *sk) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 255 | { |
| 256 | struct raw_sock *ro = raw_sk(sk); |
| 257 | int err; |
| 258 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 259 | err = raw_enable_filters(net, dev, sk, ro->filter, ro->count); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 260 | if (!err) { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 261 | err = raw_enable_errfilter(net, dev, sk, ro->err_mask); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 262 | if (err) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 263 | raw_disable_filters(net, dev, sk, ro->filter, |
| 264 | ro->count); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | return err; |
| 268 | } |
| 269 | |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 270 | static void raw_notify(struct raw_sock *ro, unsigned long msg, |
| 271 | struct net_device *dev) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 272 | { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 273 | struct sock *sk = &ro->sk; |
| 274 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 275 | if (!net_eq(dev_net(dev), sock_net(sk))) |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 276 | return; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 277 | |
| 278 | if (ro->ifindex != dev->ifindex) |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 279 | return; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 280 | |
| 281 | switch (msg) { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 282 | case NETDEV_UNREGISTER: |
| 283 | lock_sock(sk); |
| 284 | /* remove current filters & unregister */ |
| 285 | if (ro->bound) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 286 | raw_disable_allfilters(dev_net(dev), dev, sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 287 | |
| 288 | if (ro->count > 1) |
| 289 | kfree(ro->filter); |
| 290 | |
| 291 | ro->ifindex = 0; |
Marc Kleine-Budde | 6a54dde | 2020-09-16 00:34:56 +0200 | [diff] [blame] | 292 | ro->bound = 0; |
| 293 | ro->count = 0; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 294 | release_sock(sk); |
| 295 | |
| 296 | sk->sk_err = ENODEV; |
| 297 | if (!sock_flag(sk, SOCK_DEAD)) |
Alexander Aring | e3ae236 | 2021-06-27 18:48:21 -0400 | [diff] [blame] | 298 | sk_error_report(sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 299 | break; |
| 300 | |
| 301 | case NETDEV_DOWN: |
| 302 | sk->sk_err = ENETDOWN; |
| 303 | if (!sock_flag(sk, SOCK_DEAD)) |
Alexander Aring | e3ae236 | 2021-06-27 18:48:21 -0400 | [diff] [blame] | 304 | sk_error_report(sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 305 | break; |
| 306 | } |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 307 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 308 | |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 309 | static int raw_notifier(struct notifier_block *nb, unsigned long msg, |
| 310 | void *ptr) |
| 311 | { |
| 312 | struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
| 313 | |
| 314 | if (dev->type != ARPHRD_CAN) |
| 315 | return NOTIFY_DONE; |
| 316 | if (msg != NETDEV_UNREGISTER && msg != NETDEV_DOWN) |
| 317 | return NOTIFY_DONE; |
| 318 | if (unlikely(raw_busy_notifier)) /* Check for reentrant bug. */ |
| 319 | return NOTIFY_DONE; |
| 320 | |
| 321 | spin_lock(&raw_notifier_lock); |
| 322 | list_for_each_entry(raw_busy_notifier, &raw_notifier_list, notifier) { |
| 323 | spin_unlock(&raw_notifier_lock); |
| 324 | raw_notify(raw_busy_notifier, msg, dev); |
| 325 | spin_lock(&raw_notifier_lock); |
| 326 | } |
| 327 | raw_busy_notifier = NULL; |
| 328 | spin_unlock(&raw_notifier_lock); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 329 | return NOTIFY_DONE; |
| 330 | } |
| 331 | |
| 332 | static int raw_init(struct sock *sk) |
| 333 | { |
| 334 | struct raw_sock *ro = raw_sk(sk); |
| 335 | |
| 336 | ro->bound = 0; |
| 337 | ro->ifindex = 0; |
| 338 | |
| 339 | /* set default filter to single entry dfilter */ |
| 340 | ro->dfilter.can_id = 0; |
| 341 | ro->dfilter.can_mask = MASK_ALL; |
| 342 | ro->filter = &ro->dfilter; |
| 343 | ro->count = 1; |
| 344 | |
| 345 | /* set default loopback behaviour */ |
| 346 | ro->loopback = 1; |
| 347 | ro->recv_own_msgs = 0; |
Oliver Hartkopp | e2d265d | 2012-06-13 20:41:31 +0200 | [diff] [blame] | 348 | ro->fd_frames = 0; |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 349 | ro->join_filters = 0; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 350 | |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 351 | /* alloc_percpu provides zero'ed memory */ |
| 352 | ro->uniq = alloc_percpu(struct uniqframe); |
| 353 | if (unlikely(!ro->uniq)) |
| 354 | return -ENOMEM; |
| 355 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 356 | /* set notifier */ |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 357 | spin_lock(&raw_notifier_lock); |
| 358 | list_add_tail(&ro->notifier, &raw_notifier_list); |
| 359 | spin_unlock(&raw_notifier_lock); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 360 | |
| 361 | return 0; |
| 362 | } |
| 363 | |
| 364 | static int raw_release(struct socket *sock) |
| 365 | { |
| 366 | struct sock *sk = sock->sk; |
Oliver Hartkopp | 10022a6 | 2011-04-20 01:57:15 +0000 | [diff] [blame] | 367 | struct raw_sock *ro; |
| 368 | |
| 369 | if (!sk) |
| 370 | return 0; |
| 371 | |
| 372 | ro = raw_sk(sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 373 | |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 374 | spin_lock(&raw_notifier_lock); |
| 375 | while (raw_busy_notifier == ro) { |
| 376 | spin_unlock(&raw_notifier_lock); |
| 377 | schedule_timeout_uninterruptible(1); |
| 378 | spin_lock(&raw_notifier_lock); |
| 379 | } |
| 380 | list_del(&ro->notifier); |
| 381 | spin_unlock(&raw_notifier_lock); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 382 | |
| 383 | lock_sock(sk); |
| 384 | |
| 385 | /* remove current filters & unregister */ |
| 386 | if (ro->bound) { |
| 387 | if (ro->ifindex) { |
| 388 | struct net_device *dev; |
| 389 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 390 | dev = dev_get_by_index(sock_net(sk), ro->ifindex); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 391 | if (dev) { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 392 | raw_disable_allfilters(dev_net(dev), dev, sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 393 | dev_put(dev); |
| 394 | } |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 395 | } else { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 396 | raw_disable_allfilters(sock_net(sk), NULL, sk); |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 397 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 398 | } |
| 399 | |
| 400 | if (ro->count > 1) |
| 401 | kfree(ro->filter); |
| 402 | |
| 403 | ro->ifindex = 0; |
Marc Kleine-Budde | 6a54dde | 2020-09-16 00:34:56 +0200 | [diff] [blame] | 404 | ro->bound = 0; |
| 405 | ro->count = 0; |
Oliver Hartkopp | 514ac99 | 2015-04-01 07:50:28 +0200 | [diff] [blame] | 406 | free_percpu(ro->uniq); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 407 | |
Lothar Waßmann | f7e5cc0c | 2009-07-14 23:10:21 +0000 | [diff] [blame] | 408 | sock_orphan(sk); |
| 409 | sock->sk = NULL; |
| 410 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 411 | release_sock(sk); |
| 412 | sock_put(sk); |
| 413 | |
| 414 | return 0; |
| 415 | } |
| 416 | |
| 417 | static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len) |
| 418 | { |
| 419 | struct sockaddr_can *addr = (struct sockaddr_can *)uaddr; |
| 420 | struct sock *sk = sock->sk; |
| 421 | struct raw_sock *ro = raw_sk(sk); |
| 422 | int ifindex; |
| 423 | int err = 0; |
| 424 | int notify_enetdown = 0; |
| 425 | |
Oliver Hartkopp | 9e97147 | 2021-03-25 13:58:48 +0100 | [diff] [blame] | 426 | if (len < RAW_MIN_NAMELEN) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 427 | return -EINVAL; |
Marc Kleine-Budde | adb552c | 2017-07-30 23:51:01 +0200 | [diff] [blame] | 428 | if (addr->can_family != AF_CAN) |
| 429 | return -EINVAL; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 430 | |
| 431 | lock_sock(sk); |
| 432 | |
| 433 | if (ro->bound && addr->can_ifindex == ro->ifindex) |
| 434 | goto out; |
| 435 | |
| 436 | if (addr->can_ifindex) { |
| 437 | struct net_device *dev; |
| 438 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 439 | dev = dev_get_by_index(sock_net(sk), addr->can_ifindex); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 440 | if (!dev) { |
| 441 | err = -ENODEV; |
| 442 | goto out; |
| 443 | } |
| 444 | if (dev->type != ARPHRD_CAN) { |
| 445 | dev_put(dev); |
| 446 | err = -ENODEV; |
| 447 | goto out; |
| 448 | } |
| 449 | if (!(dev->flags & IFF_UP)) |
| 450 | notify_enetdown = 1; |
| 451 | |
| 452 | ifindex = dev->ifindex; |
| 453 | |
| 454 | /* filters set by default/setsockopt */ |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 455 | err = raw_enable_allfilters(sock_net(sk), dev, sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 456 | dev_put(dev); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 457 | } else { |
| 458 | ifindex = 0; |
| 459 | |
| 460 | /* filters set by default/setsockopt */ |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 461 | err = raw_enable_allfilters(sock_net(sk), NULL, sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | if (!err) { |
| 465 | if (ro->bound) { |
| 466 | /* unregister old filters */ |
| 467 | if (ro->ifindex) { |
| 468 | struct net_device *dev; |
| 469 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 470 | dev = dev_get_by_index(sock_net(sk), |
| 471 | ro->ifindex); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 472 | if (dev) { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 473 | raw_disable_allfilters(dev_net(dev), |
| 474 | dev, sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 475 | dev_put(dev); |
| 476 | } |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 477 | } else { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 478 | raw_disable_allfilters(sock_net(sk), NULL, sk); |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 479 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 480 | } |
| 481 | ro->ifindex = ifindex; |
| 482 | ro->bound = 1; |
| 483 | } |
| 484 | |
| 485 | out: |
| 486 | release_sock(sk); |
| 487 | |
| 488 | if (notify_enetdown) { |
| 489 | sk->sk_err = ENETDOWN; |
| 490 | if (!sock_flag(sk, SOCK_DEAD)) |
Alexander Aring | e3ae236 | 2021-06-27 18:48:21 -0400 | [diff] [blame] | 491 | sk_error_report(sk); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 492 | } |
| 493 | |
| 494 | return err; |
| 495 | } |
| 496 | |
| 497 | static int raw_getname(struct socket *sock, struct sockaddr *uaddr, |
Denys Vlasenko | 9b2c45d | 2018-02-12 20:00:20 +0100 | [diff] [blame] | 498 | int peer) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 499 | { |
| 500 | struct sockaddr_can *addr = (struct sockaddr_can *)uaddr; |
| 501 | struct sock *sk = sock->sk; |
| 502 | struct raw_sock *ro = raw_sk(sk); |
| 503 | |
| 504 | if (peer) |
| 505 | return -EOPNOTSUPP; |
| 506 | |
Oliver Hartkopp | 9e97147 | 2021-03-25 13:58:48 +0100 | [diff] [blame] | 507 | memset(addr, 0, RAW_MIN_NAMELEN); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 508 | addr->can_family = AF_CAN; |
| 509 | addr->can_ifindex = ro->ifindex; |
| 510 | |
Oliver Hartkopp | 9e97147 | 2021-03-25 13:58:48 +0100 | [diff] [blame] | 511 | return RAW_MIN_NAMELEN; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | static int raw_setsockopt(struct socket *sock, int level, int optname, |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 515 | sockptr_t optval, unsigned int optlen) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 516 | { |
| 517 | struct sock *sk = sock->sk; |
| 518 | struct raw_sock *ro = raw_sk(sk); |
| 519 | struct can_filter *filter = NULL; /* dyn. alloc'ed filters */ |
| 520 | struct can_filter sfilter; /* single filter */ |
| 521 | struct net_device *dev = NULL; |
| 522 | can_err_mask_t err_mask = 0; |
| 523 | int count = 0; |
| 524 | int err = 0; |
| 525 | |
| 526 | if (level != SOL_CAN_RAW) |
| 527 | return -EINVAL; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 528 | |
| 529 | switch (optname) { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 530 | case CAN_RAW_FILTER: |
| 531 | if (optlen % sizeof(struct can_filter) != 0) |
| 532 | return -EINVAL; |
| 533 | |
Marc Kleine-Budde | 332b05c | 2016-12-05 11:44:23 +0100 | [diff] [blame] | 534 | if (optlen > CAN_RAW_FILTER_MAX * sizeof(struct can_filter)) |
| 535 | return -EINVAL; |
| 536 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 537 | count = optlen / sizeof(struct can_filter); |
| 538 | |
| 539 | if (count > 1) { |
| 540 | /* filter does not fit into dfilter => alloc space */ |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 541 | filter = memdup_sockptr(optval, optlen); |
Julia Lawall | 16dff91 | 2010-05-21 22:18:34 +0000 | [diff] [blame] | 542 | if (IS_ERR(filter)) |
| 543 | return PTR_ERR(filter); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 544 | } else if (count == 1) { |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 545 | if (copy_from_sockptr(&sfilter, optval, sizeof(sfilter))) |
Sam Ravnborg | 3f91bd4 | 2008-04-26 22:57:25 -0700 | [diff] [blame] | 546 | return -EFAULT; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 547 | } |
| 548 | |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 549 | rtnl_lock(); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 550 | lock_sock(sk); |
| 551 | |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 552 | if (ro->bound && ro->ifindex) { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 553 | dev = dev_get_by_index(sock_net(sk), ro->ifindex); |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 554 | if (!dev) { |
| 555 | if (count > 1) |
| 556 | kfree(filter); |
| 557 | err = -ENODEV; |
| 558 | goto out_fil; |
| 559 | } |
| 560 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 561 | |
| 562 | if (ro->bound) { |
| 563 | /* (try to) register the new filters */ |
| 564 | if (count == 1) |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 565 | err = raw_enable_filters(sock_net(sk), dev, sk, |
| 566 | &sfilter, 1); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 567 | else |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 568 | err = raw_enable_filters(sock_net(sk), dev, sk, |
| 569 | filter, count); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 570 | if (err) { |
| 571 | if (count > 1) |
| 572 | kfree(filter); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 573 | goto out_fil; |
| 574 | } |
| 575 | |
| 576 | /* remove old filter registrations */ |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 577 | raw_disable_filters(sock_net(sk), dev, sk, ro->filter, |
| 578 | ro->count); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 579 | } |
| 580 | |
| 581 | /* remove old filter space */ |
| 582 | if (ro->count > 1) |
| 583 | kfree(ro->filter); |
| 584 | |
| 585 | /* link new filters to the socket */ |
| 586 | if (count == 1) { |
| 587 | /* copy filter data for single filter */ |
| 588 | ro->dfilter = sfilter; |
| 589 | filter = &ro->dfilter; |
| 590 | } |
| 591 | ro->filter = filter; |
| 592 | ro->count = count; |
| 593 | |
| 594 | out_fil: |
Yajun Deng | 1160dfa | 2021-08-05 19:55:27 +0800 | [diff] [blame] | 595 | dev_put(dev); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 596 | release_sock(sk); |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 597 | rtnl_unlock(); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 598 | |
| 599 | break; |
| 600 | |
| 601 | case CAN_RAW_ERR_FILTER: |
| 602 | if (optlen != sizeof(err_mask)) |
| 603 | return -EINVAL; |
| 604 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 605 | if (copy_from_sockptr(&err_mask, optval, optlen)) |
Sam Ravnborg | 3f91bd4 | 2008-04-26 22:57:25 -0700 | [diff] [blame] | 606 | return -EFAULT; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 607 | |
| 608 | err_mask &= CAN_ERR_MASK; |
| 609 | |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 610 | rtnl_lock(); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 611 | lock_sock(sk); |
| 612 | |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 613 | if (ro->bound && ro->ifindex) { |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 614 | dev = dev_get_by_index(sock_net(sk), ro->ifindex); |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 615 | if (!dev) { |
| 616 | err = -ENODEV; |
| 617 | goto out_err; |
| 618 | } |
| 619 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 620 | |
| 621 | /* remove current error mask */ |
| 622 | if (ro->bound) { |
| 623 | /* (try to) register the new err_mask */ |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 624 | err = raw_enable_errfilter(sock_net(sk), dev, sk, |
| 625 | err_mask); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 626 | |
| 627 | if (err) |
| 628 | goto out_err; |
| 629 | |
| 630 | /* remove old err_mask registration */ |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 631 | raw_disable_errfilter(sock_net(sk), dev, sk, |
| 632 | ro->err_mask); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 633 | } |
| 634 | |
| 635 | /* link new err_mask to the socket */ |
| 636 | ro->err_mask = err_mask; |
| 637 | |
| 638 | out_err: |
Yajun Deng | 1160dfa | 2021-08-05 19:55:27 +0800 | [diff] [blame] | 639 | dev_put(dev); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 640 | release_sock(sk); |
Ziyang Xuan | 54f9333 | 2021-07-22 15:08:19 +0800 | [diff] [blame] | 641 | rtnl_unlock(); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 642 | |
| 643 | break; |
| 644 | |
| 645 | case CAN_RAW_LOOPBACK: |
| 646 | if (optlen != sizeof(ro->loopback)) |
| 647 | return -EINVAL; |
| 648 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 649 | if (copy_from_sockptr(&ro->loopback, optval, optlen)) |
Sam Ravnborg | 3f91bd4 | 2008-04-26 22:57:25 -0700 | [diff] [blame] | 650 | return -EFAULT; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 651 | |
| 652 | break; |
| 653 | |
| 654 | case CAN_RAW_RECV_OWN_MSGS: |
| 655 | if (optlen != sizeof(ro->recv_own_msgs)) |
| 656 | return -EINVAL; |
| 657 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 658 | if (copy_from_sockptr(&ro->recv_own_msgs, optval, optlen)) |
Sam Ravnborg | 3f91bd4 | 2008-04-26 22:57:25 -0700 | [diff] [blame] | 659 | return -EFAULT; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 660 | |
| 661 | break; |
| 662 | |
Oliver Hartkopp | e2d265d | 2012-06-13 20:41:31 +0200 | [diff] [blame] | 663 | case CAN_RAW_FD_FRAMES: |
| 664 | if (optlen != sizeof(ro->fd_frames)) |
| 665 | return -EINVAL; |
| 666 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 667 | if (copy_from_sockptr(&ro->fd_frames, optval, optlen)) |
Oliver Hartkopp | e2d265d | 2012-06-13 20:41:31 +0200 | [diff] [blame] | 668 | return -EFAULT; |
| 669 | |
| 670 | break; |
| 671 | |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 672 | case CAN_RAW_JOIN_FILTERS: |
| 673 | if (optlen != sizeof(ro->join_filters)) |
| 674 | return -EINVAL; |
| 675 | |
Christoph Hellwig | a7b75c5 | 2020-07-23 08:09:07 +0200 | [diff] [blame] | 676 | if (copy_from_sockptr(&ro->join_filters, optval, optlen)) |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 677 | return -EFAULT; |
| 678 | |
| 679 | break; |
| 680 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 681 | default: |
| 682 | return -ENOPROTOOPT; |
| 683 | } |
| 684 | return err; |
| 685 | } |
| 686 | |
| 687 | static int raw_getsockopt(struct socket *sock, int level, int optname, |
| 688 | char __user *optval, int __user *optlen) |
| 689 | { |
| 690 | struct sock *sk = sock->sk; |
| 691 | struct raw_sock *ro = raw_sk(sk); |
| 692 | int len; |
| 693 | void *val; |
| 694 | int err = 0; |
| 695 | |
| 696 | if (level != SOL_CAN_RAW) |
| 697 | return -EINVAL; |
| 698 | if (get_user(len, optlen)) |
| 699 | return -EFAULT; |
| 700 | if (len < 0) |
| 701 | return -EINVAL; |
| 702 | |
| 703 | switch (optname) { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 704 | case CAN_RAW_FILTER: |
| 705 | lock_sock(sk); |
| 706 | if (ro->count > 0) { |
| 707 | int fsize = ro->count * sizeof(struct can_filter); |
Marc Kleine-Budde | d5e4eca | 2019-07-24 14:28:21 +0200 | [diff] [blame] | 708 | |
Oliver Hartkopp | 0de70e2 | 2020-12-16 18:49:28 +0100 | [diff] [blame] | 709 | /* user space buffer to small for filter list? */ |
| 710 | if (len < fsize) { |
| 711 | /* return -ERANGE and needed space in optlen */ |
| 712 | err = -ERANGE; |
| 713 | if (put_user(fsize, optlen)) |
| 714 | err = -EFAULT; |
| 715 | } else { |
| 716 | if (len > fsize) |
| 717 | len = fsize; |
| 718 | if (copy_to_user(optval, ro->filter, len)) |
| 719 | err = -EFAULT; |
| 720 | } |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 721 | } else { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 722 | len = 0; |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 723 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 724 | release_sock(sk); |
| 725 | |
| 726 | if (!err) |
| 727 | err = put_user(len, optlen); |
| 728 | return err; |
| 729 | |
| 730 | case CAN_RAW_ERR_FILTER: |
| 731 | if (len > sizeof(can_err_mask_t)) |
| 732 | len = sizeof(can_err_mask_t); |
| 733 | val = &ro->err_mask; |
| 734 | break; |
| 735 | |
| 736 | case CAN_RAW_LOOPBACK: |
| 737 | if (len > sizeof(int)) |
| 738 | len = sizeof(int); |
| 739 | val = &ro->loopback; |
| 740 | break; |
| 741 | |
| 742 | case CAN_RAW_RECV_OWN_MSGS: |
| 743 | if (len > sizeof(int)) |
| 744 | len = sizeof(int); |
| 745 | val = &ro->recv_own_msgs; |
| 746 | break; |
| 747 | |
Oliver Hartkopp | e2d265d | 2012-06-13 20:41:31 +0200 | [diff] [blame] | 748 | case CAN_RAW_FD_FRAMES: |
| 749 | if (len > sizeof(int)) |
| 750 | len = sizeof(int); |
| 751 | val = &ro->fd_frames; |
| 752 | break; |
| 753 | |
Oliver Hartkopp | a5581ef | 2015-04-01 07:50:29 +0200 | [diff] [blame] | 754 | case CAN_RAW_JOIN_FILTERS: |
| 755 | if (len > sizeof(int)) |
| 756 | len = sizeof(int); |
| 757 | val = &ro->join_filters; |
| 758 | break; |
| 759 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 760 | default: |
| 761 | return -ENOPROTOOPT; |
| 762 | } |
| 763 | |
| 764 | if (put_user(len, optlen)) |
| 765 | return -EFAULT; |
| 766 | if (copy_to_user(optval, val, len)) |
| 767 | return -EFAULT; |
| 768 | return 0; |
| 769 | } |
| 770 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 771 | static int raw_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 772 | { |
| 773 | struct sock *sk = sock->sk; |
| 774 | struct raw_sock *ro = raw_sk(sk); |
| 775 | struct sk_buff *skb; |
| 776 | struct net_device *dev; |
| 777 | int ifindex; |
| 778 | int err; |
| 779 | |
| 780 | if (msg->msg_name) { |
Steffen Hurrle | 342dfc3 | 2014-01-17 22:53:15 +0100 | [diff] [blame] | 781 | DECLARE_SOCKADDR(struct sockaddr_can *, addr, msg->msg_name); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 782 | |
Oliver Hartkopp | 9e97147 | 2021-03-25 13:58:48 +0100 | [diff] [blame] | 783 | if (msg->msg_namelen < RAW_MIN_NAMELEN) |
Kurt Van Dijck | 5e507328 | 2011-01-15 20:56:42 -0800 | [diff] [blame] | 784 | return -EINVAL; |
| 785 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 786 | if (addr->can_family != AF_CAN) |
| 787 | return -EINVAL; |
| 788 | |
| 789 | ifindex = addr->can_ifindex; |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 790 | } else { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 791 | ifindex = ro->ifindex; |
Marc Kleine-Budde | bff1004 | 2019-08-13 09:03:55 +0200 | [diff] [blame] | 792 | } |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 793 | |
Mario Kicherer | 8e8cda6 | 2017-02-21 12:19:47 +0100 | [diff] [blame] | 794 | dev = dev_get_by_index(sock_net(sk), ifindex); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 795 | if (!dev) |
| 796 | return -ENXIO; |
| 797 | |
Oliver Hartkopp | a43608f | 2018-10-24 10:27:12 +0200 | [diff] [blame] | 798 | err = -EINVAL; |
| 799 | if (ro->fd_frames && dev->mtu == CANFD_MTU) { |
| 800 | if (unlikely(size != CANFD_MTU && size != CAN_MTU)) |
| 801 | goto put_dev; |
| 802 | } else { |
| 803 | if (unlikely(size != CAN_MTU)) |
| 804 | goto put_dev; |
| 805 | } |
| 806 | |
Oliver Hartkopp | 156c2bb | 2013-01-17 18:43:39 +0100 | [diff] [blame] | 807 | skb = sock_alloc_send_skb(sk, size + sizeof(struct can_skb_priv), |
| 808 | msg->msg_flags & MSG_DONTWAIT, &err); |
Ilpo Järvinen | ebad5c0 | 2008-12-14 23:16:58 -0800 | [diff] [blame] | 809 | if (!skb) |
| 810 | goto put_dev; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 811 | |
Oliver Hartkopp | 2bf3440 | 2013-01-28 08:33:33 +0000 | [diff] [blame] | 812 | can_skb_reserve(skb); |
| 813 | can_skb_prv(skb)->ifindex = dev->ifindex; |
Oliver Hartkopp | d3b58c4 | 2015-06-26 11:58:19 +0200 | [diff] [blame] | 814 | can_skb_prv(skb)->skbcnt = 0; |
Oliver Hartkopp | 156c2bb | 2013-01-17 18:43:39 +0100 | [diff] [blame] | 815 | |
Al Viro | 6ce8e9c | 2014-04-06 21:25:44 -0400 | [diff] [blame] | 816 | err = memcpy_from_msg(skb_put(skb, size), msg, size); |
Ilpo Järvinen | ebad5c0 | 2008-12-14 23:16:58 -0800 | [diff] [blame] | 817 | if (err < 0) |
| 818 | goto free_skb; |
Daniel Borkmann | bf84a010 | 2013-04-14 08:08:13 +0000 | [diff] [blame] | 819 | |
Willem de Bruijn | 8f932f7 | 2018-12-17 12:24:00 -0500 | [diff] [blame] | 820 | skb_setup_tx_timestamp(skb, sk->sk_tsflags); |
Oliver Hartkopp | cff0d6e | 2010-08-03 00:31:48 -0700 | [diff] [blame] | 821 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 822 | skb->dev = dev; |
Marc Kleine-Budde | 6a54dde | 2020-09-16 00:34:56 +0200 | [diff] [blame] | 823 | skb->sk = sk; |
Rostislav Lisovy | bb5ecb0 | 2014-01-24 13:17:37 +0100 | [diff] [blame] | 824 | skb->priority = sk->sk_priority; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 825 | |
| 826 | err = can_send(skb, ro->loopback); |
| 827 | |
| 828 | dev_put(dev); |
| 829 | |
| 830 | if (err) |
Ilpo Järvinen | ebad5c0 | 2008-12-14 23:16:58 -0800 | [diff] [blame] | 831 | goto send_failed; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 832 | |
| 833 | return size; |
Ilpo Järvinen | ebad5c0 | 2008-12-14 23:16:58 -0800 | [diff] [blame] | 834 | |
| 835 | free_skb: |
| 836 | kfree_skb(skb); |
| 837 | put_dev: |
| 838 | dev_put(dev); |
| 839 | send_failed: |
| 840 | return err; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 841 | } |
| 842 | |
Ying Xue | 1b78414 | 2015-03-02 15:37:48 +0800 | [diff] [blame] | 843 | static int raw_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, |
| 844 | int flags) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 845 | { |
| 846 | struct sock *sk = sock->sk; |
| 847 | struct sk_buff *skb; |
Urs Thuermann | a219994 | 2008-02-07 18:05:04 -0800 | [diff] [blame] | 848 | int err = 0; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 849 | int noblock; |
| 850 | |
Marc Kleine-Budde | 6a54dde | 2020-09-16 00:34:56 +0200 | [diff] [blame] | 851 | noblock = flags & MSG_DONTWAIT; |
| 852 | flags &= ~MSG_DONTWAIT; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 853 | |
Vincent Mailhol | eb88531 | 2020-09-27 01:24:31 +0900 | [diff] [blame] | 854 | if (flags & MSG_ERRQUEUE) |
| 855 | return sock_recv_errqueue(sk, msg, size, |
| 856 | SOL_CAN_RAW, SCM_CAN_RAW_ERRQUEUE); |
| 857 | |
Urs Thuermann | a219994 | 2008-02-07 18:05:04 -0800 | [diff] [blame] | 858 | skb = skb_recv_datagram(sk, flags, noblock, &err); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 859 | if (!skb) |
Urs Thuermann | a219994 | 2008-02-07 18:05:04 -0800 | [diff] [blame] | 860 | return err; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 861 | |
Oliver Hartkopp | 821047c | 2014-03-01 15:31:53 +0100 | [diff] [blame] | 862 | if (size < skb->len) |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 863 | msg->msg_flags |= MSG_TRUNC; |
| 864 | else |
Oliver Hartkopp | 821047c | 2014-03-01 15:31:53 +0100 | [diff] [blame] | 865 | size = skb->len; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 866 | |
Al Viro | 7eab8d9 | 2014-04-06 21:51:23 -0400 | [diff] [blame] | 867 | err = memcpy_to_msg(msg, skb->data, size); |
Urs Thuermann | a219994 | 2008-02-07 18:05:04 -0800 | [diff] [blame] | 868 | if (err < 0) { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 869 | skb_free_datagram(sk, skb); |
Urs Thuermann | a219994 | 2008-02-07 18:05:04 -0800 | [diff] [blame] | 870 | return err; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 871 | } |
| 872 | |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 873 | sock_recv_ts_and_drops(msg, sk, skb); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 874 | |
| 875 | if (msg->msg_name) { |
Oliver Hartkopp | 9e97147 | 2021-03-25 13:58:48 +0100 | [diff] [blame] | 876 | __sockaddr_check_size(RAW_MIN_NAMELEN); |
| 877 | msg->msg_namelen = RAW_MIN_NAMELEN; |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 878 | memcpy(msg->msg_name, skb->cb, msg->msg_namelen); |
| 879 | } |
| 880 | |
Oliver Hartkopp | 1e55659 | 2010-10-19 09:32:04 +0000 | [diff] [blame] | 881 | /* assign the flags that have been recorded in raw_rcv() */ |
| 882 | msg->msg_flags |= *(raw_flags(skb)); |
| 883 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 884 | skb_free_datagram(sk, skb); |
| 885 | |
| 886 | return size; |
| 887 | } |
| 888 | |
Marc Kleine-Budde | af0b147 | 2019-08-12 15:49:04 +0200 | [diff] [blame] | 889 | static int raw_sock_no_ioctlcmd(struct socket *sock, unsigned int cmd, |
| 890 | unsigned long arg) |
Oliver Hartkopp | 473d924 | 2019-07-29 22:40:56 +0200 | [diff] [blame] | 891 | { |
| 892 | /* no ioctls for socket layer -> hand it down to NIC layer */ |
| 893 | return -ENOIOCTLCMD; |
| 894 | } |
| 895 | |
Oliver Hartkopp | 53914b6 | 2011-03-22 08:27:25 +0000 | [diff] [blame] | 896 | static const struct proto_ops raw_ops = { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 897 | .family = PF_CAN, |
| 898 | .release = raw_release, |
| 899 | .bind = raw_bind, |
| 900 | .connect = sock_no_connect, |
| 901 | .socketpair = sock_no_socketpair, |
| 902 | .accept = sock_no_accept, |
| 903 | .getname = raw_getname, |
Linus Torvalds | a11e1d4 | 2018-06-28 09:43:44 -0700 | [diff] [blame] | 904 | .poll = datagram_poll, |
Oliver Hartkopp | 473d924 | 2019-07-29 22:40:56 +0200 | [diff] [blame] | 905 | .ioctl = raw_sock_no_ioctlcmd, |
Arnd Bergmann | c7cbdbf | 2019-04-17 22:51:48 +0200 | [diff] [blame] | 906 | .gettstamp = sock_gettstamp, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 907 | .listen = sock_no_listen, |
| 908 | .shutdown = sock_no_shutdown, |
| 909 | .setsockopt = raw_setsockopt, |
| 910 | .getsockopt = raw_getsockopt, |
| 911 | .sendmsg = raw_sendmsg, |
| 912 | .recvmsg = raw_recvmsg, |
| 913 | .mmap = sock_no_mmap, |
| 914 | .sendpage = sock_no_sendpage, |
| 915 | }; |
| 916 | |
| 917 | static struct proto raw_proto __read_mostly = { |
| 918 | .name = "CAN_RAW", |
| 919 | .owner = THIS_MODULE, |
| 920 | .obj_size = sizeof(struct raw_sock), |
| 921 | .init = raw_init, |
| 922 | }; |
| 923 | |
Kurt Van Dijck | 1650629 | 2011-05-03 18:40:57 +0000 | [diff] [blame] | 924 | static const struct can_proto raw_can_proto = { |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 925 | .type = SOCK_RAW, |
| 926 | .protocol = CAN_RAW, |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 927 | .ops = &raw_ops, |
| 928 | .prot = &raw_proto, |
| 929 | }; |
| 930 | |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 931 | static struct notifier_block canraw_notifier = { |
| 932 | .notifier_call = raw_notifier |
| 933 | }; |
| 934 | |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 935 | static __init int raw_module_init(void) |
| 936 | { |
| 937 | int err; |
| 938 | |
Oliver Hartkopp | f726f3d | 2020-10-12 09:43:54 +0200 | [diff] [blame] | 939 | pr_info("can: raw protocol\n"); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 940 | |
| 941 | err = can_proto_register(&raw_can_proto); |
| 942 | if (err < 0) |
Marc Kleine-Budde | d956b1a8 | 2019-08-13 09:07:14 +0200 | [diff] [blame] | 943 | pr_err("can: registration of raw protocol failed\n"); |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 944 | else |
| 945 | register_netdevice_notifier(&canraw_notifier); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 946 | |
| 947 | return err; |
| 948 | } |
| 949 | |
| 950 | static __exit void raw_module_exit(void) |
| 951 | { |
| 952 | can_proto_unregister(&raw_can_proto); |
Tetsuo Handa | 8d0caed | 2021-06-05 19:26:35 +0900 | [diff] [blame] | 953 | unregister_netdevice_notifier(&canraw_notifier); |
Oliver Hartkopp | c18ce10 | 2007-11-16 15:53:09 -0800 | [diff] [blame] | 954 | } |
| 955 | |
| 956 | module_init(raw_module_init); |
| 957 | module_exit(raw_module_exit); |