Commit | Line | Data |
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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); | |
d92c7f8a JJ |
97 | if (!ip_version) { |
98 | kfree_skb(skb); | |
99 | return -EINVAL; | |
100 | } | |
576f3cc7 | 101 | |
d7b92aff KS |
102 | switch (*ip_version >> 4) { |
103 | case 4: | |
104 | skb->protocol = htons(ETH_P_IP); | |
105 | break; | |
106 | case 6: | |
107 | skb->protocol = htons(ETH_P_IPV6); | |
108 | break; | |
109 | default: | |
5c699fb7 | 110 | kfree_skb(skb); |
576f3cc7 | 111 | priv->netdev->stats.rx_errors++; |
d7b92aff KS |
112 | return -EINVAL; |
113 | } | |
cc36a070 SB |
114 | |
115 | /* If we change the header in loop mode, the checksum is corrupted. */ | |
116 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) | |
117 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
118 | else | |
119 | skb->ip_summed = CHECKSUM_NONE; | |
120 | ||
cc36a070 SB |
121 | if (in_interrupt()) |
122 | netif_rx(skb); | |
123 | else | |
124 | netif_rx_ni(skb); | |
125 | ||
126 | /* Update statistics. */ | |
127 | priv->netdev->stats.rx_packets++; | |
128 | priv->netdev->stats.rx_bytes += pktlen; | |
129 | ||
576f3cc7 | 130 | return 0; |
cc36a070 SB |
131 | } |
132 | ||
133 | static int delete_device(struct chnl_net *dev) | |
134 | { | |
135 | ASSERT_RTNL(); | |
136 | if (dev->netdev) | |
137 | unregister_netdevice(dev->netdev); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static void close_work(struct work_struct *work) | |
142 | { | |
143 | struct chnl_net *dev = NULL; | |
144 | struct list_head *list_node; | |
145 | struct list_head *_tmp; | |
41be5a4a | 146 | |
147 | rtnl_lock(); | |
cc36a070 SB |
148 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { |
149 | dev = list_entry(list_node, struct chnl_net, list_field); | |
8391c4aa SB |
150 | if (dev->state == CAIF_SHUTDOWN) |
151 | dev_close(dev->netdev); | |
cc36a070 | 152 | } |
41be5a4a | 153 | rtnl_unlock(); |
cc36a070 SB |
154 | } |
155 | static DECLARE_WORK(close_worker, close_work); | |
156 | ||
b3ccfbe4 | 157 | static void chnl_hold(struct cflayer *lyr) |
158 | { | |
159 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); | |
160 | dev_hold(priv->netdev); | |
161 | } | |
162 | ||
163 | static void chnl_put(struct cflayer *lyr) | |
164 | { | |
165 | struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl); | |
166 | dev_put(priv->netdev); | |
167 | } | |
168 | ||
cc36a070 SB |
169 | static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow, |
170 | int phyid) | |
171 | { | |
8391c4aa | 172 | struct chnl_net *priv = container_of(layr, struct chnl_net, chnl); |
b31fa5ba | 173 | pr_debug("NET flowctrl func called flow: %s\n", |
cc36a070 SB |
174 | flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" : |
175 | flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" : | |
176 | flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" : | |
177 | flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" : | |
178 | flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" : | |
179 | flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ? | |
180 | "REMOTE_SHUTDOWN" : "UKNOWN CTRL COMMAND"); | |
181 | ||
8391c4aa | 182 | |
cc36a070 SB |
183 | |
184 | switch (flow) { | |
185 | case CAIF_CTRLCMD_FLOW_OFF_IND: | |
8391c4aa SB |
186 | priv->flowenabled = false; |
187 | netif_stop_queue(priv->netdev); | |
188 | break; | |
cc36a070 | 189 | case CAIF_CTRLCMD_DEINIT_RSP: |
8391c4aa SB |
190 | priv->state = CAIF_DISCONNECTED; |
191 | break; | |
cc36a070 | 192 | case CAIF_CTRLCMD_INIT_FAIL_RSP: |
8391c4aa SB |
193 | priv->state = CAIF_DISCONNECTED; |
194 | wake_up_interruptible(&priv->netmgmt_wq); | |
195 | break; | |
cc36a070 | 196 | case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: |
8391c4aa | 197 | priv->state = CAIF_SHUTDOWN; |
cc36a070 | 198 | netif_tx_disable(priv->netdev); |
cc36a070 SB |
199 | schedule_work(&close_worker); |
200 | break; | |
201 | case CAIF_CTRLCMD_FLOW_ON_IND: | |
8391c4aa SB |
202 | priv->flowenabled = true; |
203 | netif_wake_queue(priv->netdev); | |
204 | break; | |
cc36a070 | 205 | case CAIF_CTRLCMD_INIT_RSP: |
b3ccfbe4 | 206 | caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put); |
8391c4aa | 207 | priv->state = CAIF_CONNECTED; |
cc36a070 SB |
208 | priv->flowenabled = true; |
209 | netif_wake_queue(priv->netdev); | |
210 | wake_up_interruptible(&priv->netmgmt_wq); | |
211 | break; | |
212 | default: | |
213 | break; | |
214 | } | |
215 | } | |
216 | ||
217 | static int chnl_net_start_xmit(struct sk_buff *skb, struct net_device *dev) | |
218 | { | |
219 | struct chnl_net *priv; | |
220 | struct cfpkt *pkt = NULL; | |
221 | int len; | |
222 | int result = -1; | |
223 | /* Get our private data. */ | |
224 | priv = netdev_priv(dev); | |
225 | ||
226 | if (skb->len > priv->netdev->mtu) { | |
b31fa5ba | 227 | pr_warn("Size of skb exceeded MTU\n"); |
5c699fb7 | 228 | kfree_skb(skb); |
576f3cc7 | 229 | dev->stats.tx_errors++; |
5c699fb7 | 230 | return NETDEV_TX_OK; |
cc36a070 SB |
231 | } |
232 | ||
233 | if (!priv->flowenabled) { | |
b31fa5ba | 234 | pr_debug("dropping packets flow off\n"); |
5c699fb7 | 235 | kfree_skb(skb); |
576f3cc7 | 236 | dev->stats.tx_dropped++; |
5c699fb7 | 237 | return NETDEV_TX_OK; |
cc36a070 SB |
238 | } |
239 | ||
240 | if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP) | |
241 | swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr); | |
242 | ||
243 | /* Store original SKB length. */ | |
244 | len = skb->len; | |
245 | ||
246 | pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb); | |
247 | ||
cc36a070 SB |
248 | /* Send the packet down the stack. */ |
249 | result = priv->chnl.dn->transmit(priv->chnl.dn, pkt); | |
250 | if (result) { | |
576f3cc7 | 251 | dev->stats.tx_dropped++; |
5c699fb7 | 252 | return NETDEV_TX_OK; |
cc36a070 SB |
253 | } |
254 | ||
255 | /* Update statistics. */ | |
256 | dev->stats.tx_packets++; | |
257 | dev->stats.tx_bytes += len; | |
258 | ||
259 | return NETDEV_TX_OK; | |
260 | } | |
261 | ||
262 | static int chnl_net_open(struct net_device *dev) | |
263 | { | |
264 | struct chnl_net *priv = NULL; | |
265 | int result = -1; | |
2aa40aef SB |
266 | int llifindex, headroom, tailroom, mtu; |
267 | struct net_device *lldev; | |
cc36a070 | 268 | ASSERT_RTNL(); |
cc36a070 | 269 | priv = netdev_priv(dev); |
cc36a070 | 270 | if (!priv) { |
b31fa5ba | 271 | pr_debug("chnl_net_open: no priv\n"); |
cc36a070 SB |
272 | return -ENODEV; |
273 | } | |
8391c4aa SB |
274 | |
275 | if (priv->state != CAIF_CONNECTING) { | |
276 | priv->state = CAIF_CONNECTING; | |
bee925db | 277 | result = caif_connect_client(dev_net(dev), &priv->conn_req, |
278 | &priv->chnl, &llifindex, | |
279 | &headroom, &tailroom); | |
8391c4aa | 280 | if (result != 0) { |
b31fa5ba JP |
281 | pr_debug("err: " |
282 | "Unable to register and open device," | |
283 | " Err:%d\n", | |
284 | result); | |
2aa40aef SB |
285 | goto error; |
286 | } | |
287 | ||
288 | lldev = dev_get_by_index(dev_net(dev), llifindex); | |
289 | ||
290 | if (lldev == NULL) { | |
b31fa5ba | 291 | pr_debug("no interface?\n"); |
2aa40aef SB |
292 | result = -ENODEV; |
293 | goto error; | |
294 | } | |
295 | ||
296 | dev->needed_tailroom = tailroom + lldev->needed_tailroom; | |
297 | dev->hard_header_len = headroom + lldev->hard_header_len + | |
298 | lldev->needed_tailroom; | |
299 | ||
300 | /* | |
301 | * MTU, head-room etc is not know before we have a | |
302 | * CAIF link layer device available. MTU calculation may | |
303 | * override initial RTNL configuration. | |
304 | * MTU is minimum of current mtu, link layer mtu pluss | |
305 | * CAIF head and tail, and PDP GPRS contexts max MTU. | |
306 | */ | |
307 | mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom)); | |
308 | mtu = min_t(int, GPRS_PDP_MTU, mtu); | |
309 | dev_set_mtu(dev, mtu); | |
310 | dev_put(lldev); | |
311 | ||
312 | if (mtu < 100) { | |
b31fa5ba | 313 | pr_warn("CAIF Interface MTU too small (%d)\n", mtu); |
2aa40aef SB |
314 | result = -ENODEV; |
315 | goto error; | |
8391c4aa | 316 | } |
cc36a070 | 317 | } |
8391c4aa | 318 | |
2aa40aef SB |
319 | rtnl_unlock(); /* Release RTNL lock during connect wait */ |
320 | ||
8391c4aa SB |
321 | result = wait_event_interruptible_timeout(priv->netmgmt_wq, |
322 | priv->state != CAIF_CONNECTING, | |
323 | CONNECT_TIMEOUT); | |
cc36a070 | 324 | |
2aa40aef SB |
325 | rtnl_lock(); |
326 | ||
cc36a070 | 327 | if (result == -ERESTARTSYS) { |
b31fa5ba | 328 | pr_debug("wait_event_interruptible woken by a signal\n"); |
2aa40aef SB |
329 | result = -ERESTARTSYS; |
330 | goto error; | |
8391c4aa | 331 | } |
2aa40aef | 332 | |
8391c4aa | 333 | if (result == 0) { |
b31fa5ba | 334 | pr_debug("connect timeout\n"); |
bee925db | 335 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
8391c4aa | 336 | priv->state = CAIF_DISCONNECTED; |
b31fa5ba | 337 | pr_debug("state disconnected\n"); |
2aa40aef SB |
338 | result = -ETIMEDOUT; |
339 | goto error; | |
8391c4aa | 340 | } |
cc36a070 | 341 | |
8391c4aa | 342 | if (priv->state != CAIF_CONNECTED) { |
b31fa5ba | 343 | pr_debug("connect failed\n"); |
2aa40aef SB |
344 | result = -ECONNREFUSED; |
345 | goto error; | |
8391c4aa | 346 | } |
b31fa5ba | 347 | pr_debug("CAIF Netdevice connected\n"); |
cc36a070 | 348 | return 0; |
2aa40aef SB |
349 | |
350 | error: | |
bee925db | 351 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
2aa40aef | 352 | priv->state = CAIF_DISCONNECTED; |
b31fa5ba | 353 | pr_debug("state disconnected\n"); |
2aa40aef SB |
354 | return result; |
355 | ||
cc36a070 SB |
356 | } |
357 | ||
358 | static int chnl_net_stop(struct net_device *dev) | |
359 | { | |
360 | struct chnl_net *priv; | |
8391c4aa | 361 | |
cc36a070 SB |
362 | ASSERT_RTNL(); |
363 | priv = netdev_priv(dev); | |
8391c4aa | 364 | priv->state = CAIF_DISCONNECTED; |
bee925db | 365 | caif_disconnect_client(dev_net(dev), &priv->chnl); |
cc36a070 SB |
366 | return 0; |
367 | } | |
368 | ||
369 | static int chnl_net_init(struct net_device *dev) | |
370 | { | |
371 | struct chnl_net *priv; | |
372 | ASSERT_RTNL(); | |
373 | priv = netdev_priv(dev); | |
374 | strncpy(priv->name, dev->name, sizeof(priv->name)); | |
375 | return 0; | |
376 | } | |
377 | ||
378 | static void chnl_net_uninit(struct net_device *dev) | |
379 | { | |
380 | struct chnl_net *priv; | |
381 | ASSERT_RTNL(); | |
382 | priv = netdev_priv(dev); | |
383 | robust_list_del(&priv->list_field); | |
384 | } | |
385 | ||
386 | static const struct net_device_ops netdev_ops = { | |
387 | .ndo_open = chnl_net_open, | |
388 | .ndo_stop = chnl_net_stop, | |
389 | .ndo_init = chnl_net_init, | |
390 | .ndo_uninit = chnl_net_uninit, | |
391 | .ndo_start_xmit = chnl_net_start_xmit, | |
392 | }; | |
393 | ||
b3ccfbe4 | 394 | static void chnl_net_destructor(struct net_device *dev) |
395 | { | |
396 | struct chnl_net *priv = netdev_priv(dev); | |
397 | caif_free_client(&priv->chnl); | |
398 | free_netdev(dev); | |
399 | } | |
400 | ||
cc36a070 SB |
401 | static void ipcaif_net_setup(struct net_device *dev) |
402 | { | |
403 | struct chnl_net *priv; | |
404 | dev->netdev_ops = &netdev_ops; | |
b3ccfbe4 | 405 | dev->destructor = chnl_net_destructor; |
cc36a070 SB |
406 | dev->flags |= IFF_NOARP; |
407 | dev->flags |= IFF_POINTOPOINT; | |
2aa40aef | 408 | dev->mtu = GPRS_PDP_MTU; |
cc36a070 SB |
409 | dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN; |
410 | ||
411 | priv = netdev_priv(dev); | |
412 | priv->chnl.receive = chnl_recv_cb; | |
413 | priv->chnl.ctrlcmd = chnl_flowctrl_cb; | |
414 | priv->netdev = dev; | |
415 | priv->conn_req.protocol = CAIFPROTO_DATAGRAM; | |
416 | priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW; | |
417 | priv->conn_req.priority = CAIF_PRIO_LOW; | |
418 | /* Insert illegal value */ | |
e3abcc2a | 419 | priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID; |
cc36a070 SB |
420 | priv->flowenabled = false; |
421 | ||
cc36a070 | 422 | init_waitqueue_head(&priv->netmgmt_wq); |
cc36a070 SB |
423 | } |
424 | ||
425 | ||
426 | static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev) | |
427 | { | |
428 | struct chnl_net *priv; | |
429 | u8 loop; | |
430 | priv = netdev_priv(dev); | |
2809cec5 DM |
431 | if (nla_put_u32(skb, IFLA_CAIF_IPV4_CONNID, |
432 | priv->conn_req.sockaddr.u.dgm.connection_id) || | |
433 | nla_put_u32(skb, IFLA_CAIF_IPV6_CONNID, | |
434 | priv->conn_req.sockaddr.u.dgm.connection_id)) | |
435 | goto nla_put_failure; | |
cc36a070 | 436 | loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP; |
2809cec5 DM |
437 | if (nla_put_u8(skb, IFLA_CAIF_LOOPBACK, loop)) |
438 | goto nla_put_failure; | |
cc36a070 SB |
439 | return 0; |
440 | nla_put_failure: | |
441 | return -EMSGSIZE; | |
442 | ||
443 | } | |
444 | ||
445 | static void caif_netlink_parms(struct nlattr *data[], | |
446 | struct caif_connect_request *conn_req) | |
447 | { | |
448 | if (!data) { | |
b31fa5ba | 449 | pr_warn("no params data found\n"); |
cc36a070 SB |
450 | return; |
451 | } | |
452 | if (data[IFLA_CAIF_IPV4_CONNID]) | |
453 | conn_req->sockaddr.u.dgm.connection_id = | |
454 | nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]); | |
455 | if (data[IFLA_CAIF_IPV6_CONNID]) | |
456 | conn_req->sockaddr.u.dgm.connection_id = | |
457 | nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]); | |
458 | if (data[IFLA_CAIF_LOOPBACK]) { | |
459 | if (nla_get_u8(data[IFLA_CAIF_LOOPBACK])) | |
460 | conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP; | |
461 | else | |
462 | conn_req->protocol = CAIFPROTO_DATAGRAM; | |
463 | } | |
464 | } | |
465 | ||
466 | static int ipcaif_newlink(struct net *src_net, struct net_device *dev, | |
467 | struct nlattr *tb[], struct nlattr *data[]) | |
468 | { | |
469 | int ret; | |
470 | struct chnl_net *caifdev; | |
471 | ASSERT_RTNL(); | |
472 | caifdev = netdev_priv(dev); | |
473 | caif_netlink_parms(data, &caifdev->conn_req); | |
8391c4aa SB |
474 | dev_net_set(caifdev->netdev, src_net); |
475 | ||
cc36a070 SB |
476 | ret = register_netdevice(dev); |
477 | if (ret) | |
b31fa5ba | 478 | pr_warn("device rtml registration failed\n"); |
b2df5a84 DM |
479 | else |
480 | list_add(&caifdev->list_field, &chnl_net_list); | |
b3ccfbe4 | 481 | |
e3abcc2a | 482 | /* Use ifindex as connection id, and use loopback channel default. */ |
483 | if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) { | |
b3ccfbe4 | 484 | caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex; |
e3abcc2a | 485 | caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP; |
486 | } | |
cc36a070 SB |
487 | return ret; |
488 | } | |
489 | ||
490 | static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[], | |
491 | struct nlattr *data[]) | |
492 | { | |
493 | struct chnl_net *caifdev; | |
494 | ASSERT_RTNL(); | |
495 | caifdev = netdev_priv(dev); | |
496 | caif_netlink_parms(data, &caifdev->conn_req); | |
497 | netdev_state_change(dev); | |
498 | return 0; | |
499 | } | |
500 | ||
501 | static size_t ipcaif_get_size(const struct net_device *dev) | |
502 | { | |
503 | return | |
504 | /* IFLA_CAIF_IPV4_CONNID */ | |
505 | nla_total_size(4) + | |
506 | /* IFLA_CAIF_IPV6_CONNID */ | |
507 | nla_total_size(4) + | |
508 | /* IFLA_CAIF_LOOPBACK */ | |
509 | nla_total_size(2) + | |
510 | 0; | |
511 | } | |
512 | ||
513 | static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = { | |
514 | [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 }, | |
515 | [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 }, | |
516 | [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 } | |
517 | }; | |
518 | ||
519 | ||
520 | static struct rtnl_link_ops ipcaif_link_ops __read_mostly = { | |
521 | .kind = "caif", | |
522 | .priv_size = sizeof(struct chnl_net), | |
523 | .setup = ipcaif_net_setup, | |
524 | .maxtype = IFLA_CAIF_MAX, | |
525 | .policy = ipcaif_policy, | |
526 | .newlink = ipcaif_newlink, | |
527 | .changelink = ipcaif_changelink, | |
528 | .get_size = ipcaif_get_size, | |
529 | .fill_info = ipcaif_fill_info, | |
530 | ||
531 | }; | |
532 | ||
533 | static int __init chnl_init_module(void) | |
534 | { | |
535 | return rtnl_link_register(&ipcaif_link_ops); | |
536 | } | |
537 | ||
538 | static void __exit chnl_exit_module(void) | |
539 | { | |
540 | struct chnl_net *dev = NULL; | |
541 | struct list_head *list_node; | |
542 | struct list_head *_tmp; | |
543 | rtnl_link_unregister(&ipcaif_link_ops); | |
544 | rtnl_lock(); | |
545 | list_for_each_safe(list_node, _tmp, &chnl_net_list) { | |
546 | dev = list_entry(list_node, struct chnl_net, list_field); | |
547 | list_del(list_node); | |
548 | delete_device(dev); | |
549 | } | |
550 | rtnl_unlock(); | |
551 | } | |
552 | ||
553 | module_init(chnl_init_module); | |
554 | module_exit(chnl_exit_module); |