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