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af873fce | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cc36a070 SB |
2 | /* |
3 | * Copyright (C) ST-Ericsson AB 2010 | |
26ee65e6 | 4 | * Authors: Sjur Brendeland |
c2cd0a56 | 5 | * Daniel Martensson |
cc36a070 SB |
6 | */ |
7 | ||
b31fa5ba JP |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
9 | ||
cc36a070 SB |
10 | #include <linux/fs.h> |
11 | #include <linux/init.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/if_ether.h> | |
cc36a070 SB |
15 | #include <linux/ip.h> |
16 | #include <linux/sched.h> | |
17 | #include <linux/sockios.h> | |
18 | #include <linux/caif/if_caif.h> | |
19 | #include <net/rtnetlink.h> | |
20 | #include <net/caif/caif_layer.h> | |
cc36a070 SB |
21 | #include <net/caif/cfpkt.h> |
22 | #include <net/caif/caif_dev.h> | |
23 | ||
8391c4aa | 24 | /* GPRS PDP connection has MTU to 1500 */ |
2aa40aef | 25 | #define GPRS_PDP_MTU 1500 |
8391c4aa SB |
26 | /* 5 sec. connect timeout */ |
27 | #define CONNECT_TIMEOUT (5 * HZ) | |
cc36a070 | 28 | #define CAIF_NET_DEFAULT_QUEUE_LEN 500 |
e3abcc2a | 29 | #define UNDEF_CONNID 0xffffffff |
cc36a070 | 30 | |
cc36a070 SB |
31 | /*This list is protected by the rtnl lock. */ |
32 | static LIST_HEAD(chnl_net_list); | |
33 | ||
34 | MODULE_LICENSE("GPL"); | |
35 | MODULE_ALIAS_RTNL_LINK("caif"); | |
36 | ||
8391c4aa SB |
37 | enum caif_states { |
38 | CAIF_CONNECTED = 1, | |
39 | CAIF_CONNECTING, | |
40 | CAIF_DISCONNECTED, | |
41 | CAIF_SHUTDOWN | |
42 | }; | |
43 | ||
cc36a070 SB |
44 | struct chnl_net { |
45 | struct cflayer chnl; | |
cc36a070 SB |
46 | struct caif_connect_request conn_req; |
47 | struct list_head list_field; | |
48 | struct net_device *netdev; | |
49 | char name[256]; | |
50 | wait_queue_head_t netmgmt_wq; | |
51 | /* Flow status to remember and control the transmission. */ | |
52 | bool flowenabled; | |
8391c4aa | 53 | enum caif_states state; |
cc36a070 SB |
54 | }; |
55 | ||
56 | static void robust_list_del(struct list_head *delete_node) | |
57 | { | |
58 | struct list_head *list_node; | |
59 | struct list_head *n; | |
60 | ASSERT_RTNL(); | |
61 | list_for_each_safe(list_node, n, &chnl_net_list) { | |
62 | if (list_node == delete_node) { | |
63 | list_del(list_node); | |
8391c4aa | 64 | return; |
cc36a070 SB |
65 | } |
66 | } | |
8391c4aa | 67 | WARN_ON(1); |
cc36a070 SB |
68 | } |
69 | ||
70 | static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt) | |
71 | { | |
72 | struct sk_buff *skb; | |
af2ce213 | 73 | struct chnl_net *priv; |
cc36a070 | 74 | int pktlen; |
d7b92aff KS |
75 | const u8 *ip_version; |
76 | u8 buf; | |
cc36a070 SB |
77 | |
78 | priv = container_of(layr, struct chnl_net, chnl); | |
cc36a070 SB |
79 | if (!priv) |
80 | return -EINVAL; | |
81 | ||
3f874adc | 82 | skb = (struct sk_buff *) cfpkt_tonative(pkt); |
83 | ||
cc36a070 | 84 | /* Get length of CAIF packet. */ |
3f874adc | 85 | pktlen = skb->len; |
cc36a070 | 86 | |
cc36a070 SB |
87 | /* Pass some minimum information and |
88 | * send the packet to the net stack. | |
89 | */ | |
90 | skb->dev = priv->netdev; | |
d7b92aff KS |
91 | |
92 | /* check the version of IP */ | |
93 | ip_version = skb_header_pointer(skb, 0, 1, &buf); | |
d92c7f8a JJ |
94 | if (!ip_version) { |
95 | kfree_skb(skb); | |
96 | return -EINVAL; | |
97 | } | |
576f3cc7 | 98 | |
d7b92aff KS |
99 | switch (*ip_version >> 4) { |
100 | case 4: | |
101 | skb->protocol = htons(ETH_P_IP); | |
102 | break; | |
103 | case 6: | |
104 | skb->protocol = htons(ETH_P_IPV6); | |
105 | break; | |
106 | default: | |
5c699fb7 | 107 | kfree_skb(skb); |
576f3cc7 | 108 | priv->netdev->stats.rx_errors++; |
d7b92aff KS |
109 | return -EINVAL; |
110 | } | |
cc36a070 SB |
111 | |
112 | /* If we change the header in loop mode, the checksum is corrupted. */ | |
113 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) | |
114 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
115 | else | |
116 | skb->ip_summed = CHECKSUM_NONE; | |
117 | ||
cc36a070 SB |
118 | if (in_interrupt()) |
119 | netif_rx(skb); | |
120 | else | |
121 | netif_rx_ni(skb); | |
122 | ||
123 | /* Update statistics. */ | |
124 | priv->netdev->stats.rx_packets++; | |
125 | priv->netdev->stats.rx_bytes += pktlen; | |
126 | ||
576f3cc7 | 127 | return 0; |
cc36a070 SB |
128 | } |
129 | ||
130 | static int delete_device(struct chnl_net *dev) | |
131 | { | |
132 | ASSERT_RTNL(); | |
133 | if (dev->netdev) | |
134 | unregister_netdevice(dev->netdev); | |
135 | return 0; | |
136 | } | |
137 | ||
138 | static void close_work(struct work_struct *work) | |
139 | { | |
140 | struct chnl_net *dev = NULL; | |
141 | struct list_head *list_node; | |
142 | struct list_head *_tmp; | |
41be5a4a | 143 | |
144 | rtnl_lock(); | |
cc36a070 SB |
145 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { |
146 | dev = list_entry(list_node, struct chnl_net, list_field); | |
8391c4aa SB |
147 | if (dev->state == CAIF_SHUTDOWN) |
148 | dev_close(dev->netdev); | |
cc36a070 | 149 | } |
41be5a4a | 150 | rtnl_unlock(); |
cc36a070 SB |
151 | } |
152 | static DECLARE_WORK(close_worker, close_work); | |
153 | ||
b3ccfbe4 | 154 | static void chnl_hold(struct cflayer *lyr) |
155 | { | |
156 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); | |
157 | dev_hold(priv->netdev); | |
158 | } | |
159 | ||
160 | static void chnl_put(struct cflayer *lyr) | |
161 | { | |
162 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); | |
163 | dev_put(priv->netdev); | |
164 | } | |
165 | ||
cc36a070 | 166 | static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow, |
3bffc475 | 167 | int phyid) |
cc36a070 | 168 | { |
8391c4aa | 169 | struct chnl_net *priv = container_of(layr, struct chnl_net, chnl); |
b31fa5ba | 170 | pr_debug("NET flowctrl func called flow: %s\n", |
cc36a070 SB |
171 | flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" : |
172 | flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" : | |
173 | flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" : | |
174 | flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" : | |
175 | flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" : | |
176 | flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ? | |
5e84b38b | 177 | "REMOTE_SHUTDOWN" : "UNKNOWN CTRL COMMAND"); |
cc36a070 | 178 | |
8391c4aa | 179 | |
cc36a070 SB |
180 | |
181 | switch (flow) { | |
182 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
8391c4aa SB |
183 | priv->flowenabled = false; |
184 | netif_stop_queue(priv->netdev); | |
185 | break; | |
cc36a070 | 186 | case CAIF_CTRLCMD_DEINIT_RSP: |
8391c4aa SB |
187 | priv->state = CAIF_DISCONNECTED; |
188 | break; | |
cc36a070 | 189 | case CAIF_CTRLCMD_INIT_FAIL_RSP: |
8391c4aa SB |
190 | priv->state = CAIF_DISCONNECTED; |
191 | wake_up_interruptible(&priv->netmgmt_wq); | |
192 | break; | |
cc36a070 | 193 | case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: |
8391c4aa | 194 | priv->state = CAIF_SHUTDOWN; |
cc36a070 | 195 | netif_tx_disable(priv->netdev); |
cc36a070 SB |
196 | schedule_work(&close_worker); |
197 | break; | |
198 | case CAIF_CTRLCMD_FLOW_ON_IND: | |
8391c4aa SB |
199 | priv->flowenabled = true; |
200 | netif_wake_queue(priv->netdev); | |
201 | break; | |
cc36a070 | 202 | case CAIF_CTRLCMD_INIT_RSP: |
b3ccfbe4 | 203 | caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put); |
8391c4aa | 204 | priv->state = CAIF_CONNECTED; |
cc36a070 SB |
205 | priv->flowenabled = true; |
206 | netif_wake_queue(priv->netdev); | |
207 | wake_up_interruptible(&priv->netmgmt_wq); | |
208 | break; | |
209 | default: | |
210 | break; | |
211 | } | |
212 | } | |
213 | ||
214 | static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
215 | { | |
216 | struct chnl_net *priv; | |
217 | struct cfpkt *pkt = NULL; | |
218 | int len; | |
219 | int result = -1; | |
220 | /* Get our private data. */ | |
221 | priv = netdev_priv(dev); | |
222 | ||
223 | if (skb->len > priv->netdev->mtu) { | |
b31fa5ba | 224 | pr_warn("Size of skb exceeded MTU\n"); |
5c699fb7 | 225 | kfree_skb(skb); |
576f3cc7 | 226 | dev->stats.tx_errors++; |
5c699fb7 | 227 | return NETDEV_TX_OK; |
cc36a070 SB |
228 | } |
229 | ||
230 | if (!priv->flowenabled) { | |
b31fa5ba | 231 | pr_debug("dropping packets flow off\n"); |
5c699fb7 | 232 | kfree_skb(skb); |
576f3cc7 | 233 | dev->stats.tx_dropped++; |
5c699fb7 | 234 | return NETDEV_TX_OK; |
cc36a070 SB |
235 | } |
236 | ||
237 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) | |
238 | swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); | |
239 | ||
240 | /* Store original SKB length. */ | |
241 | len = skb->len; | |
242 | ||
243 | pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb); | |
244 | ||
cc36a070 SB |
245 | /* Send the packet down the stack. */ |
246 | result = priv->chnl.dn->transmit(priv->chnl.dn, pkt); | |
247 | if (result) { | |
576f3cc7 | 248 | dev->stats.tx_dropped++; |
5c699fb7 | 249 | return NETDEV_TX_OK; |
cc36a070 SB |
250 | } |
251 | ||
252 | /* Update statistics. */ | |
253 | dev->stats.tx_packets++; | |
254 | dev->stats.tx_bytes += len; | |
255 | ||
256 | return NETDEV_TX_OK; | |
257 | } | |
258 | ||
259 | static int chnl_net_open(struct net_device *dev) | |
260 | { | |
261 | struct chnl_net *priv = NULL; | |
262 | int result = -1; | |
2aa40aef SB |
263 | int llifindex, headroom, tailroom, mtu; |
264 | struct net_device *lldev; | |
cc36a070 | 265 | ASSERT_RTNL(); |
cc36a070 | 266 | priv = netdev_priv(dev); |
cc36a070 | 267 | if (!priv) { |
b31fa5ba | 268 | pr_debug("chnl_net_open: no priv\n"); |
cc36a070 SB |
269 | return -ENODEV; |
270 | } | |
8391c4aa SB |
271 | |
272 | if (priv->state != CAIF_CONNECTING) { | |
273 | priv->state = CAIF_CONNECTING; | |
bee925db | 274 | result = caif_connect_client(dev_net(dev), &priv->conn_req, |
275 | &priv->chnl, &llifindex, | |
276 | &headroom, &tailroom); | |
8391c4aa | 277 | if (result != 0) { |
b31fa5ba JP |
278 | pr_debug("err: " |
279 | "Unable to register and open device," | |
280 | " Err:%d\n", | |
281 | result); | |
2aa40aef SB |
282 | goto error; |
283 | } | |
284 | ||
a74e9426 | 285 | lldev = __dev_get_by_index(dev_net(dev), llifindex); |
2aa40aef SB |
286 | |
287 | if (lldev == NULL) { | |
b31fa5ba | 288 | pr_debug("no interface?\n"); |
2aa40aef SB |
289 | result = -ENODEV; |
290 | goto error; | |
291 | } | |
292 | ||
293 | dev->needed_tailroom = tailroom + lldev->needed_tailroom; | |
294 | dev->hard_header_len = headroom + lldev->hard_header_len + | |
295 | lldev->needed_tailroom; | |
296 | ||
297 | /* | |
298 | * MTU, head-room etc is not know before we have a | |
299 | * CAIF link layer device available. MTU calculation may | |
300 | * override initial RTNL configuration. | |
301 | * MTU is minimum of current mtu, link layer mtu pluss | |
302 | * CAIF head and tail, and PDP GPRS contexts max MTU. | |
303 | */ | |
304 | mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom)); | |
305 | mtu = min_t(int, GPRS_PDP_MTU, mtu); | |
306 | dev_set_mtu(dev, mtu); | |
2aa40aef SB |
307 | |
308 | if (mtu < 100) { | |
b31fa5ba | 309 | pr_warn("CAIF Interface MTU too small (%d)\n", mtu); |
2aa40aef SB |
310 | result = -ENODEV; |
311 | goto error; | |
8391c4aa | 312 | } |
cc36a070 | 313 | } |
8391c4aa | 314 | |
2aa40aef SB |
315 | rtnl_unlock(); /* Release RTNL lock during connect wait */ |
316 | ||
8391c4aa SB |
317 | result = wait_event_interruptible_timeout(priv->netmgmt_wq, |
318 | priv->state != CAIF_CONNECTING, | |
319 | CONNECT_TIMEOUT); | |
cc36a070 | 320 | |
2aa40aef SB |
321 | rtnl_lock(); |
322 | ||
cc36a070 | 323 | if (result == -ERESTARTSYS) { |
b31fa5ba | 324 | pr_debug("wait_event_interruptible woken by a signal\n"); |
2aa40aef SB |
325 | result = -ERESTARTSYS; |
326 | goto error; | |
8391c4aa | 327 | } |
2aa40aef | 328 | |
8391c4aa | 329 | if (result == 0) { |
b31fa5ba | 330 | pr_debug("connect timeout\n"); |
bee925db | 331 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
8391c4aa | 332 | priv->state = CAIF_DISCONNECTED; |
b31fa5ba | 333 | pr_debug("state disconnected\n"); |
2aa40aef SB |
334 | result = -ETIMEDOUT; |
335 | goto error; | |
8391c4aa | 336 | } |
cc36a070 | 337 | |
8391c4aa | 338 | if (priv->state != CAIF_CONNECTED) { |
b31fa5ba | 339 | pr_debug("connect failed\n"); |
2aa40aef SB |
340 | result = -ECONNREFUSED; |
341 | goto error; | |
8391c4aa | 342 | } |
b31fa5ba | 343 | pr_debug("CAIF Netdevice connected\n"); |
cc36a070 | 344 | return 0; |
2aa40aef SB |
345 | |
346 | error: | |
bee925db | 347 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
2aa40aef | 348 | priv->state = CAIF_DISCONNECTED; |
b31fa5ba | 349 | pr_debug("state disconnected\n"); |
2aa40aef SB |
350 | return result; |
351 | ||
cc36a070 SB |
352 | } |
353 | ||
354 | static int chnl_net_stop(struct net_device *dev) | |
355 | { | |
356 | struct chnl_net *priv; | |
8391c4aa | 357 | |
cc36a070 SB |
358 | ASSERT_RTNL(); |
359 | priv = netdev_priv(dev); | |
8391c4aa | 360 | priv->state = CAIF_DISCONNECTED; |
bee925db | 361 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
cc36a070 SB |
362 | return 0; |
363 | } | |
364 | ||
365 | static int chnl_net_init(struct net_device *dev) | |
366 | { | |
367 | struct chnl_net *priv; | |
368 | ASSERT_RTNL(); | |
369 | priv = netdev_priv(dev); | |
370 | strncpy(priv->name, dev->name, sizeof(priv->name)); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | static void chnl_net_uninit(struct net_device *dev) | |
375 | { | |
376 | struct chnl_net *priv; | |
377 | ASSERT_RTNL(); | |
378 | priv = netdev_priv(dev); | |
379 | robust_list_del(&priv->list_field); | |
380 | } | |
381 | ||
382 | static const struct net_device_ops netdev_ops = { | |
383 | .ndo_open = chnl_net_open, | |
384 | .ndo_stop = chnl_net_stop, | |
385 | .ndo_init = chnl_net_init, | |
386 | .ndo_uninit = chnl_net_uninit, | |
387 | .ndo_start_xmit = chnl_net_start_xmit, | |
388 | }; | |
389 | ||
b3ccfbe4 | 390 | static void chnl_net_destructor(struct net_device *dev) |
391 | { | |
392 | struct chnl_net *priv = netdev_priv(dev); | |
393 | caif_free_client(&priv->chnl); | |
b3ccfbe4 | 394 | } |
395 | ||
cc36a070 SB |
396 | static void ipcaif_net_setup(struct net_device *dev) |
397 | { | |
398 | struct chnl_net *priv; | |
399 | dev->netdev_ops = &netdev_ops; | |
cf124db5 DM |
400 | dev->needs_free_netdev = true; |
401 | dev->priv_destructor = chnl_net_destructor; | |
cc36a070 SB |
402 | dev->flags |= IFF_NOARP; |
403 | dev->flags |= IFF_POINTOPOINT; | |
2aa40aef | 404 | dev->mtu = GPRS_PDP_MTU; |
cc36a070 SB |
405 | dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN; |
406 | ||
407 | priv = netdev_priv(dev); | |
408 | priv->chnl.receive = chnl_recv_cb; | |
409 | priv->chnl.ctrlcmd = chnl_flowctrl_cb; | |
410 | priv->netdev = dev; | |
411 | priv->conn_req.protocol = CAIFPROTO_DATAGRAM; | |
412 | priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW; | |
413 | priv->conn_req.priority = CAIF_PRIO_LOW; | |
414 | /* Insert illegal value */ | |
e3abcc2a | 415 | priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID; |
cc36a070 SB |
416 | priv->flowenabled = false; |
417 | ||
cc36a070 | 418 | init_waitqueue_head(&priv->netmgmt_wq); |
cc36a070 SB |
419 | } |
420 | ||
421 | ||
422 | static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
423 | { | |
424 | struct chnl_net *priv; | |
425 | u8 loop; | |
426 | priv = netdev_priv(dev); | |
2809cec5 DM |
427 | if (nla_put_u32(skb, IFLA_CAIF_IPV4_CONNID, |
428 | priv->conn_req.sockaddr.u.dgm.connection_id) || | |
429 | nla_put_u32(skb, IFLA_CAIF_IPV6_CONNID, | |
430 | priv->conn_req.sockaddr.u.dgm.connection_id)) | |
431 | goto nla_put_failure; | |
cc36a070 | 432 | loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP; |
2809cec5 DM |
433 | if (nla_put_u8(skb, IFLA_CAIF_LOOPBACK, loop)) |
434 | goto nla_put_failure; | |
cc36a070 SB |
435 | return 0; |
436 | nla_put_failure: | |
437 | return -EMSGSIZE; | |
438 | ||
439 | } | |
440 | ||
441 | static void caif_netlink_parms(struct nlattr *data[], | |
3bffc475 | 442 | struct caif_connect_request *conn_req) |
cc36a070 SB |
443 | { |
444 | if (!data) { | |
b31fa5ba | 445 | pr_warn("no params data found\n"); |
cc36a070 SB |
446 | return; |
447 | } | |
448 | if (data[IFLA_CAIF_IPV4_CONNID]) | |
449 | conn_req->sockaddr.u.dgm.connection_id = | |
450 | nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]); | |
451 | if (data[IFLA_CAIF_IPV6_CONNID]) | |
452 | conn_req->sockaddr.u.dgm.connection_id = | |
453 | nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]); | |
454 | if (data[IFLA_CAIF_LOOPBACK]) { | |
455 | if (nla_get_u8(data[IFLA_CAIF_LOOPBACK])) | |
456 | conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP; | |
457 | else | |
458 | conn_req->protocol = CAIFPROTO_DATAGRAM; | |
459 | } | |
460 | } | |
461 | ||
462 | static int ipcaif_newlink(struct net *src_net, struct net_device *dev, | |
7a3f4a18 MS |
463 | struct nlattr *tb[], struct nlattr *data[], |
464 | struct netlink_ext_ack *extack) | |
cc36a070 SB |
465 | { |
466 | int ret; | |
467 | struct chnl_net *caifdev; | |
468 | ASSERT_RTNL(); | |
469 | caifdev = netdev_priv(dev); | |
470 | caif_netlink_parms(data, &caifdev->conn_req); | |
8391c4aa | 471 | |
cc36a070 SB |
472 | ret = register_netdevice(dev); |
473 | if (ret) | |
b31fa5ba | 474 | pr_warn("device rtml registration failed\n"); |
b2df5a84 DM |
475 | else |
476 | list_add(&caifdev->list_field, &chnl_net_list); | |
b3ccfbe4 | 477 | |
e3abcc2a | 478 | /* Use ifindex as connection id, and use loopback channel default. */ |
479 | if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) { | |
b3ccfbe4 | 480 | caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex; |
e3abcc2a | 481 | caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP; |
482 | } | |
cc36a070 SB |
483 | return ret; |
484 | } | |
485 | ||
486 | static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[], | |
ad744b22 MS |
487 | struct nlattr *data[], |
488 | struct netlink_ext_ack *extack) | |
cc36a070 SB |
489 | { |
490 | struct chnl_net *caifdev; | |
491 | ASSERT_RTNL(); | |
492 | caifdev = netdev_priv(dev); | |
493 | caif_netlink_parms(data, &caifdev->conn_req); | |
494 | netdev_state_change(dev); | |
495 | return 0; | |
496 | } | |
497 | ||
498 | static size_t ipcaif_get_size(const struct net_device *dev) | |
499 | { | |
500 | return | |
501 | /* IFLA_CAIF_IPV4_CONNID */ | |
502 | nla_total_size(4) + | |
503 | /* IFLA_CAIF_IPV6_CONNID */ | |
504 | nla_total_size(4) + | |
505 | /* IFLA_CAIF_LOOPBACK */ | |
506 | nla_total_size(2) + | |
507 | 0; | |
508 | } | |
509 | ||
510 | static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = { | |
511 | [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 }, | |
512 | [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 }, | |
513 | [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 } | |
514 | }; | |
515 | ||
516 | ||
517 | static struct rtnl_link_ops ipcaif_link_ops __read_mostly = { | |
518 | .kind = "caif", | |
519 | .priv_size = sizeof(struct chnl_net), | |
520 | .setup = ipcaif_net_setup, | |
521 | .maxtype = IFLA_CAIF_MAX, | |
522 | .policy = ipcaif_policy, | |
523 | .newlink = ipcaif_newlink, | |
524 | .changelink = ipcaif_changelink, | |
525 | .get_size = ipcaif_get_size, | |
526 | .fill_info = ipcaif_fill_info, | |
527 | ||
528 | }; | |
529 | ||
530 | static int __init chnl_init_module(void) | |
531 | { | |
532 | return rtnl_link_register(&ipcaif_link_ops); | |
533 | } | |
534 | ||
535 | static void __exit chnl_exit_module(void) | |
536 | { | |
537 | struct chnl_net *dev = NULL; | |
538 | struct list_head *list_node; | |
539 | struct list_head *_tmp; | |
540 | rtnl_link_unregister(&ipcaif_link_ops); | |
541 | rtnl_lock(); | |
542 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { | |
543 | dev = list_entry(list_node, struct chnl_net, list_field); | |
544 | list_del(list_node); | |
545 | delete_device(dev); | |
546 | } | |
547 | rtnl_unlock(); | |
548 | } | |
549 | ||
550 | module_init(chnl_init_module); | |
551 | module_exit(chnl_exit_module); |