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cc36a070 SB |
1 | /* |
2 | * Copyright (C) ST-Ericsson AB 2010 | |
3 | * Authors: Sjur Brendeland/sjur.brandeland@stericsson.com | |
4 | * Daniel Martensson / Daniel.Martensson@stericsson.com | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | */ | |
7 | ||
b31fa5ba JP |
8 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
9 | ||
cc36a070 | 10 | #include <linux/fs.h> |
a6b7a407 | 11 | #include <linux/hardirq.h> |
cc36a070 SB |
12 | #include <linux/init.h> |
13 | #include <linux/module.h> | |
14 | #include <linux/netdevice.h> | |
15 | #include <linux/if_ether.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/ip.h> | |
18 | #include <linux/sched.h> | |
19 | #include <linux/sockios.h> | |
20 | #include <linux/caif/if_caif.h> | |
21 | #include <net/rtnetlink.h> | |
22 | #include <net/caif/caif_layer.h> | |
cc36a070 SB |
23 | #include <net/caif/cfpkt.h> |
24 | #include <net/caif/caif_dev.h> | |
25 | ||
8391c4aa | 26 | /* GPRS PDP connection has MTU to 1500 */ |
2aa40aef | 27 | #define GPRS_PDP_MTU 1500 |
8391c4aa SB |
28 | /* 5 sec. connect timeout */ |
29 | #define CONNECT_TIMEOUT (5 * HZ) | |
cc36a070 | 30 | #define CAIF_NET_DEFAULT_QUEUE_LEN 500 |
e3abcc2a | 31 | #define UNDEF_CONNID 0xffffffff |
cc36a070 | 32 | |
cc36a070 SB |
33 | /*This list is protected by the rtnl lock. */ |
34 | static LIST_HEAD(chnl_net_list); | |
35 | ||
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_ALIAS_RTNL_LINK("caif"); | |
38 | ||
8391c4aa SB |
39 | enum caif_states { |
40 | CAIF_CONNECTED = 1, | |
41 | CAIF_CONNECTING, | |
42 | CAIF_DISCONNECTED, | |
43 | CAIF_SHUTDOWN | |
44 | }; | |
45 | ||
cc36a070 SB |
46 | struct chnl_net { |
47 | struct cflayer chnl; | |
48 | struct net_device_stats stats; | |
49 | struct caif_connect_request conn_req; | |
50 | struct list_head list_field; | |
51 | struct net_device *netdev; | |
52 | char name[256]; | |
53 | wait_queue_head_t netmgmt_wq; | |
54 | /* Flow status to remember and control the transmission. */ | |
55 | bool flowenabled; | |
8391c4aa | 56 | enum caif_states state; |
cc36a070 SB |
57 | }; |
58 | ||
59 | static void robust_list_del(struct list_head *delete_node) | |
60 | { | |
61 | struct list_head *list_node; | |
62 | struct list_head *n; | |
63 | ASSERT_RTNL(); | |
64 | list_for_each_safe(list_node, n, &chnl_net_list) { | |
65 | if (list_node == delete_node) { | |
66 | list_del(list_node); | |
8391c4aa | 67 | return; |
cc36a070 SB |
68 | } |
69 | } | |
8391c4aa | 70 | WARN_ON(1); |
cc36a070 SB |
71 | } |
72 | ||
73 | static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt) | |
74 | { | |
75 | struct sk_buff *skb; | |
af2ce213 | 76 | struct chnl_net *priv; |
cc36a070 | 77 | int pktlen; |
d7b92aff KS |
78 | const u8 *ip_version; |
79 | u8 buf; | |
cc36a070 SB |
80 | |
81 | priv = container_of(layr, struct chnl_net, chnl); | |
cc36a070 SB |
82 | if (!priv) |
83 | return -EINVAL; | |
84 | ||
3f874adc | 85 | skb = (struct sk_buff *) cfpkt_tonative(pkt); |
86 | ||
cc36a070 | 87 | /* Get length of CAIF packet. */ |
3f874adc | 88 | pktlen = skb->len; |
cc36a070 | 89 | |
cc36a070 SB |
90 | /* Pass some minimum information and |
91 | * send the packet to the net stack. | |
92 | */ | |
93 | skb->dev = priv->netdev; | |
d7b92aff KS |
94 | |
95 | /* check the version of IP */ | |
96 | ip_version = skb_header_pointer(skb, 0, 1, &buf); | |
576f3cc7 | 97 | |
d7b92aff KS |
98 | switch (*ip_version >> 4) { |
99 | case 4: | |
100 | skb->protocol = htons(ETH_P_IP); | |
101 | break; | |
102 | case 6: | |
103 | skb->protocol = htons(ETH_P_IPV6); | |
104 | break; | |
105 | default: | |
576f3cc7 | 106 | priv->netdev->stats.rx_errors++; |
d7b92aff KS |
107 | return -EINVAL; |
108 | } | |
cc36a070 SB |
109 | |
110 | /* If we change the header in loop mode, the checksum is corrupted. */ | |
111 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) | |
112 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
113 | else | |
114 | skb->ip_summed = CHECKSUM_NONE; | |
115 | ||
cc36a070 SB |
116 | if (in_interrupt()) |
117 | netif_rx(skb); | |
118 | else | |
119 | netif_rx_ni(skb); | |
120 | ||
121 | /* Update statistics. */ | |
122 | priv->netdev->stats.rx_packets++; | |
123 | priv->netdev->stats.rx_bytes += pktlen; | |
124 | ||
576f3cc7 | 125 | return 0; |
cc36a070 SB |
126 | } |
127 | ||
128 | static int delete_device(struct chnl_net *dev) | |
129 | { | |
130 | ASSERT_RTNL(); | |
131 | if (dev->netdev) | |
132 | unregister_netdevice(dev->netdev); | |
133 | return 0; | |
134 | } | |
135 | ||
136 | static void close_work(struct work_struct *work) | |
137 | { | |
138 | struct chnl_net *dev = NULL; | |
139 | struct list_head *list_node; | |
140 | struct list_head *_tmp; | |
41be5a4a | 141 | |
142 | rtnl_lock(); | |
cc36a070 SB |
143 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { |
144 | dev = list_entry(list_node, struct chnl_net, list_field); | |
8391c4aa SB |
145 | if (dev->state == CAIF_SHUTDOWN) |
146 | dev_close(dev->netdev); | |
cc36a070 | 147 | } |
41be5a4a | 148 | rtnl_unlock(); |
cc36a070 SB |
149 | } |
150 | static DECLARE_WORK(close_worker, close_work); | |
151 | ||
b3ccfbe4 | 152 | static void chnl_hold(struct cflayer *lyr) |
153 | { | |
154 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); | |
155 | dev_hold(priv->netdev); | |
156 | } | |
157 | ||
158 | static void chnl_put(struct cflayer *lyr) | |
159 | { | |
160 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); | |
161 | dev_put(priv->netdev); | |
162 | } | |
163 | ||
cc36a070 SB |
164 | static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow, |
165 | int phyid) | |
166 | { | |
8391c4aa | 167 | struct chnl_net *priv = container_of(layr, struct chnl_net, chnl); |
b31fa5ba | 168 | pr_debug("NET flowctrl func called flow: %s\n", |
cc36a070 SB |
169 | flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" : |
170 | flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" : | |
171 | flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" : | |
172 | flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" : | |
173 | flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" : | |
174 | flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ? | |
175 | "REMOTE_SHUTDOWN" : "UKNOWN CTRL COMMAND"); | |
176 | ||
8391c4aa | 177 | |
cc36a070 SB |
178 | |
179 | switch (flow) { | |
180 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
8391c4aa SB |
181 | priv->flowenabled = false; |
182 | netif_stop_queue(priv->netdev); | |
183 | break; | |
cc36a070 | 184 | case CAIF_CTRLCMD_DEINIT_RSP: |
8391c4aa SB |
185 | priv->state = CAIF_DISCONNECTED; |
186 | break; | |
cc36a070 | 187 | case CAIF_CTRLCMD_INIT_FAIL_RSP: |
8391c4aa SB |
188 | priv->state = CAIF_DISCONNECTED; |
189 | wake_up_interruptible(&priv->netmgmt_wq); | |
190 | break; | |
cc36a070 | 191 | case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: |
8391c4aa | 192 | priv->state = CAIF_SHUTDOWN; |
cc36a070 | 193 | netif_tx_disable(priv->netdev); |
cc36a070 SB |
194 | schedule_work(&close_worker); |
195 | break; | |
196 | case CAIF_CTRLCMD_FLOW_ON_IND: | |
8391c4aa SB |
197 | priv->flowenabled = true; |
198 | netif_wake_queue(priv->netdev); | |
199 | break; | |
cc36a070 | 200 | case CAIF_CTRLCMD_INIT_RSP: |
b3ccfbe4 | 201 | caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put); |
8391c4aa | 202 | priv->state = CAIF_CONNECTED; |
cc36a070 SB |
203 | priv->flowenabled = true; |
204 | netif_wake_queue(priv->netdev); | |
205 | wake_up_interruptible(&priv->netmgmt_wq); | |
206 | break; | |
207 | default: | |
208 | break; | |
209 | } | |
210 | } | |
211 | ||
212 | static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
213 | { | |
214 | struct chnl_net *priv; | |
215 | struct cfpkt *pkt = NULL; | |
216 | int len; | |
217 | int result = -1; | |
218 | /* Get our private data. */ | |
219 | priv = netdev_priv(dev); | |
220 | ||
221 | if (skb->len > priv->netdev->mtu) { | |
b31fa5ba | 222 | pr_warn("Size of skb exceeded MTU\n"); |
576f3cc7 | 223 | dev->stats.tx_errors++; |
cc36a070 SB |
224 | return -ENOSPC; |
225 | } | |
226 | ||
227 | if (!priv->flowenabled) { | |
b31fa5ba | 228 | pr_debug("dropping packets flow off\n"); |
576f3cc7 | 229 | dev->stats.tx_dropped++; |
cc36a070 SB |
230 | return NETDEV_TX_BUSY; |
231 | } | |
232 | ||
233 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) | |
234 | swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); | |
235 | ||
236 | /* Store original SKB length. */ | |
237 | len = skb->len; | |
238 | ||
239 | pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb); | |
240 | ||
cc36a070 SB |
241 | /* Send the packet down the stack. */ |
242 | result = priv->chnl.dn->transmit(priv->chnl.dn, pkt); | |
243 | if (result) { | |
576f3cc7 | 244 | dev->stats.tx_dropped++; |
cc36a070 SB |
245 | return result; |
246 | } | |
247 | ||
248 | /* Update statistics. */ | |
249 | dev->stats.tx_packets++; | |
250 | dev->stats.tx_bytes += len; | |
251 | ||
252 | return NETDEV_TX_OK; | |
253 | } | |
254 | ||
255 | static int chnl_net_open(struct net_device *dev) | |
256 | { | |
257 | struct chnl_net *priv = NULL; | |
258 | int result = -1; | |
2aa40aef SB |
259 | int llifindex, headroom, tailroom, mtu; |
260 | struct net_device *lldev; | |
cc36a070 | 261 | ASSERT_RTNL(); |
cc36a070 | 262 | priv = netdev_priv(dev); |
cc36a070 | 263 | if (!priv) { |
b31fa5ba | 264 | pr_debug("chnl_net_open: no priv\n"); |
cc36a070 SB |
265 | return -ENODEV; |
266 | } | |
8391c4aa SB |
267 | |
268 | if (priv->state != CAIF_CONNECTING) { | |
269 | priv->state = CAIF_CONNECTING; | |
bee925db | 270 | result = caif_connect_client(dev_net(dev), &priv->conn_req, |
271 | &priv->chnl, &llifindex, | |
272 | &headroom, &tailroom); | |
8391c4aa | 273 | if (result != 0) { |
b31fa5ba JP |
274 | pr_debug("err: " |
275 | "Unable to register and open device," | |
276 | " Err:%d\n", | |
277 | result); | |
2aa40aef SB |
278 | goto error; |
279 | } | |
280 | ||
281 | lldev = dev_get_by_index(dev_net(dev), llifindex); | |
282 | ||
283 | if (lldev == NULL) { | |
b31fa5ba | 284 | pr_debug("no interface?\n"); |
2aa40aef SB |
285 | result = -ENODEV; |
286 | goto error; | |
287 | } | |
288 | ||
289 | dev->needed_tailroom = tailroom + lldev->needed_tailroom; | |
290 | dev->hard_header_len = headroom + lldev->hard_header_len + | |
291 | lldev->needed_tailroom; | |
292 | ||
293 | /* | |
294 | * MTU, head-room etc is not know before we have a | |
295 | * CAIF link layer device available. MTU calculation may | |
296 | * override initial RTNL configuration. | |
297 | * MTU is minimum of current mtu, link layer mtu pluss | |
298 | * CAIF head and tail, and PDP GPRS contexts max MTU. | |
299 | */ | |
300 | mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom)); | |
301 | mtu = min_t(int, GPRS_PDP_MTU, mtu); | |
302 | dev_set_mtu(dev, mtu); | |
303 | dev_put(lldev); | |
304 | ||
305 | if (mtu < 100) { | |
b31fa5ba | 306 | pr_warn("CAIF Interface MTU too small (%d)\n", mtu); |
2aa40aef SB |
307 | result = -ENODEV; |
308 | goto error; | |
8391c4aa | 309 | } |
cc36a070 | 310 | } |
8391c4aa | 311 | |
2aa40aef SB |
312 | rtnl_unlock(); /* Release RTNL lock during connect wait */ |
313 | ||
8391c4aa SB |
314 | result = wait_event_interruptible_timeout(priv->netmgmt_wq, |
315 | priv->state != CAIF_CONNECTING, | |
316 | CONNECT_TIMEOUT); | |
cc36a070 | 317 | |
2aa40aef SB |
318 | rtnl_lock(); |
319 | ||
cc36a070 | 320 | if (result == -ERESTARTSYS) { |
b31fa5ba | 321 | pr_debug("wait_event_interruptible woken by a signal\n"); |
2aa40aef SB |
322 | result = -ERESTARTSYS; |
323 | goto error; | |
8391c4aa | 324 | } |
2aa40aef | 325 | |
8391c4aa | 326 | if (result == 0) { |
b31fa5ba | 327 | pr_debug("connect timeout\n"); |
bee925db | 328 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
8391c4aa | 329 | priv->state = CAIF_DISCONNECTED; |
b31fa5ba | 330 | pr_debug("state disconnected\n"); |
2aa40aef SB |
331 | result = -ETIMEDOUT; |
332 | goto error; | |
8391c4aa | 333 | } |
cc36a070 | 334 | |
8391c4aa | 335 | if (priv->state != CAIF_CONNECTED) { |
b31fa5ba | 336 | pr_debug("connect failed\n"); |
2aa40aef SB |
337 | result = -ECONNREFUSED; |
338 | goto error; | |
8391c4aa | 339 | } |
b31fa5ba | 340 | pr_debug("CAIF Netdevice connected\n"); |
cc36a070 | 341 | return 0; |
2aa40aef SB |
342 | |
343 | error: | |
bee925db | 344 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
2aa40aef | 345 | priv->state = CAIF_DISCONNECTED; |
b31fa5ba | 346 | pr_debug("state disconnected\n"); |
2aa40aef SB |
347 | return result; |
348 | ||
cc36a070 SB |
349 | } |
350 | ||
351 | static int chnl_net_stop(struct net_device *dev) | |
352 | { | |
353 | struct chnl_net *priv; | |
8391c4aa | 354 | |
cc36a070 SB |
355 | ASSERT_RTNL(); |
356 | priv = netdev_priv(dev); | |
8391c4aa | 357 | priv->state = CAIF_DISCONNECTED; |
bee925db | 358 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
cc36a070 SB |
359 | return 0; |
360 | } | |
361 | ||
362 | static int chnl_net_init(struct net_device *dev) | |
363 | { | |
364 | struct chnl_net *priv; | |
365 | ASSERT_RTNL(); | |
366 | priv = netdev_priv(dev); | |
367 | strncpy(priv->name, dev->name, sizeof(priv->name)); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | static void chnl_net_uninit(struct net_device *dev) | |
372 | { | |
373 | struct chnl_net *priv; | |
374 | ASSERT_RTNL(); | |
375 | priv = netdev_priv(dev); | |
376 | robust_list_del(&priv->list_field); | |
377 | } | |
378 | ||
379 | static const struct net_device_ops netdev_ops = { | |
380 | .ndo_open = chnl_net_open, | |
381 | .ndo_stop = chnl_net_stop, | |
382 | .ndo_init = chnl_net_init, | |
383 | .ndo_uninit = chnl_net_uninit, | |
384 | .ndo_start_xmit = chnl_net_start_xmit, | |
385 | }; | |
386 | ||
b3ccfbe4 | 387 | static void chnl_net_destructor(struct net_device *dev) |
388 | { | |
389 | struct chnl_net *priv = netdev_priv(dev); | |
390 | caif_free_client(&priv->chnl); | |
391 | free_netdev(dev); | |
392 | } | |
393 | ||
cc36a070 SB |
394 | static void ipcaif_net_setup(struct net_device *dev) |
395 | { | |
396 | struct chnl_net *priv; | |
397 | dev->netdev_ops = &netdev_ops; | |
b3ccfbe4 | 398 | dev->destructor = chnl_net_destructor; |
cc36a070 SB |
399 | dev->flags |= IFF_NOARP; |
400 | dev->flags |= IFF_POINTOPOINT; | |
2aa40aef | 401 | dev->mtu = GPRS_PDP_MTU; |
cc36a070 SB |
402 | dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN; |
403 | ||
404 | priv = netdev_priv(dev); | |
405 | priv->chnl.receive = chnl_recv_cb; | |
406 | priv->chnl.ctrlcmd = chnl_flowctrl_cb; | |
407 | priv->netdev = dev; | |
408 | priv->conn_req.protocol = CAIFPROTO_DATAGRAM; | |
409 | priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW; | |
410 | priv->conn_req.priority = CAIF_PRIO_LOW; | |
411 | /* Insert illegal value */ | |
e3abcc2a | 412 | priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID; |
cc36a070 SB |
413 | priv->flowenabled = false; |
414 | ||
cc36a070 | 415 | init_waitqueue_head(&priv->netmgmt_wq); |
cc36a070 SB |
416 | } |
417 | ||
418 | ||
419 | static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
420 | { | |
421 | struct chnl_net *priv; | |
422 | u8 loop; | |
423 | priv = netdev_priv(dev); | |
424 | NLA_PUT_U32(skb, IFLA_CAIF_IPV4_CONNID, | |
425 | priv->conn_req.sockaddr.u.dgm.connection_id); | |
426 | NLA_PUT_U32(skb, IFLA_CAIF_IPV6_CONNID, | |
427 | priv->conn_req.sockaddr.u.dgm.connection_id); | |
428 | loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP; | |
429 | NLA_PUT_U8(skb, IFLA_CAIF_LOOPBACK, loop); | |
430 | ||
431 | ||
432 | return 0; | |
433 | nla_put_failure: | |
434 | return -EMSGSIZE; | |
435 | ||
436 | } | |
437 | ||
438 | static void caif_netlink_parms(struct nlattr *data[], | |
439 | struct caif_connect_request *conn_req) | |
440 | { | |
441 | if (!data) { | |
b31fa5ba | 442 | pr_warn("no params data found\n"); |
cc36a070 SB |
443 | return; |
444 | } | |
445 | if (data[IFLA_CAIF_IPV4_CONNID]) | |
446 | conn_req->sockaddr.u.dgm.connection_id = | |
447 | nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]); | |
448 | if (data[IFLA_CAIF_IPV6_CONNID]) | |
449 | conn_req->sockaddr.u.dgm.connection_id = | |
450 | nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]); | |
451 | if (data[IFLA_CAIF_LOOPBACK]) { | |
452 | if (nla_get_u8(data[IFLA_CAIF_LOOPBACK])) | |
453 | conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP; | |
454 | else | |
455 | conn_req->protocol = CAIFPROTO_DATAGRAM; | |
456 | } | |
457 | } | |
458 | ||
459 | static int ipcaif_newlink(struct net *src_net, struct net_device *dev, | |
460 | struct nlattr *tb[], struct nlattr *data[]) | |
461 | { | |
462 | int ret; | |
463 | struct chnl_net *caifdev; | |
464 | ASSERT_RTNL(); | |
465 | caifdev = netdev_priv(dev); | |
466 | caif_netlink_parms(data, &caifdev->conn_req); | |
8391c4aa SB |
467 | dev_net_set(caifdev->netdev, src_net); |
468 | ||
cc36a070 SB |
469 | ret = register_netdevice(dev); |
470 | if (ret) | |
b31fa5ba | 471 | pr_warn("device rtml registration failed\n"); |
b2df5a84 DM |
472 | else |
473 | list_add(&caifdev->list_field, &chnl_net_list); | |
b3ccfbe4 | 474 | |
e3abcc2a | 475 | /* Use ifindex as connection id, and use loopback channel default. */ |
476 | if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) { | |
b3ccfbe4 | 477 | caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex; |
e3abcc2a | 478 | caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP; |
479 | } | |
cc36a070 SB |
480 | return ret; |
481 | } | |
482 | ||
483 | static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[], | |
484 | struct nlattr *data[]) | |
485 | { | |
486 | struct chnl_net *caifdev; | |
487 | ASSERT_RTNL(); | |
488 | caifdev = netdev_priv(dev); | |
489 | caif_netlink_parms(data, &caifdev->conn_req); | |
490 | netdev_state_change(dev); | |
491 | return 0; | |
492 | } | |
493 | ||
494 | static size_t ipcaif_get_size(const struct net_device *dev) | |
495 | { | |
496 | return | |
497 | /* IFLA_CAIF_IPV4_CONNID */ | |
498 | nla_total_size(4) + | |
499 | /* IFLA_CAIF_IPV6_CONNID */ | |
500 | nla_total_size(4) + | |
501 | /* IFLA_CAIF_LOOPBACK */ | |
502 | nla_total_size(2) + | |
503 | 0; | |
504 | } | |
505 | ||
506 | static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = { | |
507 | [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 }, | |
508 | [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 }, | |
509 | [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 } | |
510 | }; | |
511 | ||
512 | ||
513 | static struct rtnl_link_ops ipcaif_link_ops __read_mostly = { | |
514 | .kind = "caif", | |
515 | .priv_size = sizeof(struct chnl_net), | |
516 | .setup = ipcaif_net_setup, | |
517 | .maxtype = IFLA_CAIF_MAX, | |
518 | .policy = ipcaif_policy, | |
519 | .newlink = ipcaif_newlink, | |
520 | .changelink = ipcaif_changelink, | |
521 | .get_size = ipcaif_get_size, | |
522 | .fill_info = ipcaif_fill_info, | |
523 | ||
524 | }; | |
525 | ||
526 | static int __init chnl_init_module(void) | |
527 | { | |
528 | return rtnl_link_register(&ipcaif_link_ops); | |
529 | } | |
530 | ||
531 | static void __exit chnl_exit_module(void) | |
532 | { | |
533 | struct chnl_net *dev = NULL; | |
534 | struct list_head *list_node; | |
535 | struct list_head *_tmp; | |
536 | rtnl_link_unregister(&ipcaif_link_ops); | |
537 | rtnl_lock(); | |
538 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { | |
539 | dev = list_entry(list_node, struct chnl_net, list_field); | |
540 | list_del(list_node); | |
541 | delete_device(dev); | |
542 | } | |
543 | rtnl_unlock(); | |
544 | } | |
545 | ||
546 | module_init(chnl_init_module); | |
547 | module_exit(chnl_exit_module); |