blob: 1a3398a89aeeece54ea7d2b1ae8d1152591a0ac3 [file] [log] [blame]
Sjur Braendelandcc36a072010-03-30 13:56:27 +00001/*
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
Joe Perchesb31fa5b2010-09-05 21:31:11 +00008#define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
9
Sjur Braendelandcc36a072010-03-30 13:56:27 +000010#include <linux/version.h>
11#include <linux/fs.h>
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>
Sjur Braendelandcc36a072010-03-30 13:56:27 +000023#include <net/caif/cfpkt.h>
24#include <net/caif/caif_dev.h>
25
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000026/* GPRS PDP connection has MTU to 1500 */
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +000027#define GPRS_PDP_MTU 1500
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000028/* 5 sec. connect timeout */
29#define CONNECT_TIMEOUT (5 * HZ)
Sjur Braendelandcc36a072010-03-30 13:56:27 +000030#define CAIF_NET_DEFAULT_QUEUE_LEN 500
31
Sjur Braendelandcc36a072010-03-30 13:56:27 +000032/*This list is protected by the rtnl lock. */
33static LIST_HEAD(chnl_net_list);
34
35MODULE_LICENSE("GPL");
36MODULE_ALIAS_RTNL_LINK("caif");
37
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000038enum caif_states {
39 CAIF_CONNECTED = 1,
40 CAIF_CONNECTING,
41 CAIF_DISCONNECTED,
42 CAIF_SHUTDOWN
43};
44
Sjur Braendelandcc36a072010-03-30 13:56:27 +000045struct chnl_net {
46 struct cflayer chnl;
47 struct net_device_stats stats;
48 struct caif_connect_request conn_req;
49 struct list_head list_field;
50 struct net_device *netdev;
51 char name[256];
52 wait_queue_head_t netmgmt_wq;
53 /* Flow status to remember and control the transmission. */
54 bool flowenabled;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000055 enum caif_states state;
Sjur Braendelandcc36a072010-03-30 13:56:27 +000056};
57
58static void robust_list_del(struct list_head *delete_node)
59{
60 struct list_head *list_node;
61 struct list_head *n;
62 ASSERT_RTNL();
63 list_for_each_safe(list_node, n, &chnl_net_list) {
64 if (list_node == delete_node) {
65 list_del(list_node);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000066 return;
Sjur Braendelandcc36a072010-03-30 13:56:27 +000067 }
68 }
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000069 WARN_ON(1);
Sjur Braendelandcc36a072010-03-30 13:56:27 +000070}
71
72static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
73{
74 struct sk_buff *skb;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +000075 struct chnl_net *priv = container_of(layr, struct chnl_net, chnl);
Sjur Braendelandcc36a072010-03-30 13:56:27 +000076 int pktlen;
77 int err = 0;
Kumar Sanghvid7b92af2011-01-07 01:57:08 +000078 const u8 *ip_version;
79 u8 buf;
Sjur Braendelandcc36a072010-03-30 13:56:27 +000080
81 priv = container_of(layr, struct chnl_net, chnl);
82
83 if (!priv)
84 return -EINVAL;
85
86 /* Get length of CAIF packet. */
87 pktlen = cfpkt_getlen(pkt);
88
89 skb = (struct sk_buff *) cfpkt_tonative(pkt);
90 /* Pass some minimum information and
91 * send the packet to the net stack.
92 */
93 skb->dev = priv->netdev;
Kumar Sanghvid7b92af2011-01-07 01:57:08 +000094
95 /* check the version of IP */
96 ip_version = skb_header_pointer(skb, 0, 1, &buf);
97 if (!ip_version)
98 return -EINVAL;
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:
107 return -EINVAL;
108 }
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000109
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
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000116 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
125 return err;
126}
127
128static 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
136static 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;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000141 /* May be called with or without RTNL lock held */
142 int islocked = rtnl_is_locked();
143 if (!islocked)
144 rtnl_lock();
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000145 list_for_each_safe(list_node, _tmp, &chnl_net_list) {
146 dev = list_entry(list_node, struct chnl_net, list_field);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000147 if (dev->state == CAIF_SHUTDOWN)
148 dev_close(dev->netdev);
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000149 }
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000150 if (!islocked)
151 rtnl_unlock();
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000152}
153static DECLARE_WORK(close_worker, close_work);
154
sjur.brandeland@stericsson.comb3ccfbe2011-05-13 02:44:04 +0000155static 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
161static 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
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000167static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow,
168 int phyid)
169{
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000170 struct chnl_net *priv = container_of(layr, struct chnl_net, chnl);
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000171 pr_debug("NET flowctrl func called flow: %s\n",
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000172 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
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000180
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000181
182 switch (flow) {
183 case CAIF_CTRLCMD_FLOW_OFF_IND:
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000184 priv->flowenabled = false;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000185 netif_stop_queue(priv->netdev);
186 break;
187 case CAIF_CTRLCMD_DEINIT_RSP:
188 priv->state = CAIF_DISCONNECTED;
189 break;
190 case CAIF_CTRLCMD_INIT_FAIL_RSP:
191 priv->state = CAIF_DISCONNECTED;
192 wake_up_interruptible(&priv->netmgmt_wq);
193 break;
194 case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
195 priv->state = CAIF_SHUTDOWN;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000196 netif_tx_disable(priv->netdev);
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000197 schedule_work(&close_worker);
198 break;
199 case CAIF_CTRLCMD_FLOW_ON_IND:
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000200 priv->flowenabled = true;
201 netif_wake_queue(priv->netdev);
202 break;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000203 case CAIF_CTRLCMD_INIT_RSP:
sjur.brandeland@stericsson.comb3ccfbe2011-05-13 02:44:04 +0000204 caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000205 priv->state = CAIF_CONNECTED;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000206 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
215static 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) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000225 pr_warn("Size of skb exceeded MTU\n");
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000226 return -ENOSPC;
227 }
228
229 if (!priv->flowenabled) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000230 pr_debug("dropping packets flow off\n");
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000231 return NETDEV_TX_BUSY;
232 }
233
234 if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
235 swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
236
237 /* Store original SKB length. */
238 len = skb->len;
239
240 pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
241
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000242 /* Send the packet down the stack. */
243 result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
244 if (result) {
245 if (result == -EAGAIN)
246 result = NETDEV_TX_BUSY;
247 return result;
248 }
249
250 /* Update statistics. */
251 dev->stats.tx_packets++;
252 dev->stats.tx_bytes += len;
253
254 return NETDEV_TX_OK;
255}
256
257static int chnl_net_open(struct net_device *dev)
258{
259 struct chnl_net *priv = NULL;
260 int result = -1;
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000261 int llifindex, headroom, tailroom, mtu;
262 struct net_device *lldev;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000263 ASSERT_RTNL();
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000264 priv = netdev_priv(dev);
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000265 if (!priv) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000266 pr_debug("chnl_net_open: no priv\n");
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000267 return -ENODEV;
268 }
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000269
270 if (priv->state != CAIF_CONNECTING) {
271 priv->state = CAIF_CONNECTING;
sjur.brandeland@stericsson.combee925d2011-05-13 02:44:05 +0000272 result = caif_connect_client(dev_net(dev), &priv->conn_req,
273 &priv->chnl, &llifindex,
274 &headroom, &tailroom);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000275 if (result != 0) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000276 pr_debug("err: "
277 "Unable to register and open device,"
278 " Err:%d\n",
279 result);
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000280 goto error;
281 }
282
283 lldev = dev_get_by_index(dev_net(dev), llifindex);
284
285 if (lldev == NULL) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000286 pr_debug("no interface?\n");
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000287 result = -ENODEV;
288 goto error;
289 }
290
291 dev->needed_tailroom = tailroom + lldev->needed_tailroom;
292 dev->hard_header_len = headroom + lldev->hard_header_len +
293 lldev->needed_tailroom;
294
295 /*
296 * MTU, head-room etc is not know before we have a
297 * CAIF link layer device available. MTU calculation may
298 * override initial RTNL configuration.
299 * MTU is minimum of current mtu, link layer mtu pluss
300 * CAIF head and tail, and PDP GPRS contexts max MTU.
301 */
302 mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom));
303 mtu = min_t(int, GPRS_PDP_MTU, mtu);
304 dev_set_mtu(dev, mtu);
305 dev_put(lldev);
306
307 if (mtu < 100) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000308 pr_warn("CAIF Interface MTU too small (%d)\n", mtu);
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000309 result = -ENODEV;
310 goto error;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000311 }
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000312 }
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000313
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000314 rtnl_unlock(); /* Release RTNL lock during connect wait */
315
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000316 result = wait_event_interruptible_timeout(priv->netmgmt_wq,
317 priv->state != CAIF_CONNECTING,
318 CONNECT_TIMEOUT);
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000319
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000320 rtnl_lock();
321
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000322 if (result == -ERESTARTSYS) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000323 pr_debug("wait_event_interruptible woken by a signal\n");
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000324 result = -ERESTARTSYS;
325 goto error;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000326 }
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000327
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000328 if (result == 0) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000329 pr_debug("connect timeout\n");
sjur.brandeland@stericsson.combee925d2011-05-13 02:44:05 +0000330 caif_disconnect_client(dev_net(dev), &priv->chnl);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000331 priv->state = CAIF_DISCONNECTED;
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000332 pr_debug("state disconnected\n");
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000333 result = -ETIMEDOUT;
334 goto error;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000335 }
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000336
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000337 if (priv->state != CAIF_CONNECTED) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000338 pr_debug("connect failed\n");
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000339 result = -ECONNREFUSED;
340 goto error;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000341 }
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000342 pr_debug("CAIF Netdevice connected\n");
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000343 return 0;
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000344
345error:
sjur.brandeland@stericsson.combee925d2011-05-13 02:44:05 +0000346 caif_disconnect_client(dev_net(dev), &priv->chnl);
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000347 priv->state = CAIF_DISCONNECTED;
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000348 pr_debug("state disconnected\n");
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000349 return result;
350
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000351}
352
353static int chnl_net_stop(struct net_device *dev)
354{
355 struct chnl_net *priv;
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000356
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000357 ASSERT_RTNL();
358 priv = netdev_priv(dev);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000359 priv->state = CAIF_DISCONNECTED;
sjur.brandeland@stericsson.combee925d2011-05-13 02:44:05 +0000360 caif_disconnect_client(dev_net(dev), &priv->chnl);
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000361 return 0;
362}
363
364static int chnl_net_init(struct net_device *dev)
365{
366 struct chnl_net *priv;
367 ASSERT_RTNL();
368 priv = netdev_priv(dev);
369 strncpy(priv->name, dev->name, sizeof(priv->name));
370 return 0;
371}
372
373static void chnl_net_uninit(struct net_device *dev)
374{
375 struct chnl_net *priv;
376 ASSERT_RTNL();
377 priv = netdev_priv(dev);
378 robust_list_del(&priv->list_field);
379}
380
381static const struct net_device_ops netdev_ops = {
382 .ndo_open = chnl_net_open,
383 .ndo_stop = chnl_net_stop,
384 .ndo_init = chnl_net_init,
385 .ndo_uninit = chnl_net_uninit,
386 .ndo_start_xmit = chnl_net_start_xmit,
387};
388
sjur.brandeland@stericsson.comb3ccfbe2011-05-13 02:44:04 +0000389static void chnl_net_destructor(struct net_device *dev)
390{
391 struct chnl_net *priv = netdev_priv(dev);
392 caif_free_client(&priv->chnl);
393 free_netdev(dev);
394}
395
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000396static void ipcaif_net_setup(struct net_device *dev)
397{
398 struct chnl_net *priv;
399 dev->netdev_ops = &netdev_ops;
sjur.brandeland@stericsson.comb3ccfbe2011-05-13 02:44:04 +0000400 dev->destructor = chnl_net_destructor;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000401 dev->flags |= IFF_NOARP;
402 dev->flags |= IFF_POINTOPOINT;
Sjur Braendeland2aa40ae2010-06-17 06:55:40 +0000403 dev->mtu = GPRS_PDP_MTU;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000404 dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN;
405
406 priv = netdev_priv(dev);
407 priv->chnl.receive = chnl_recv_cb;
408 priv->chnl.ctrlcmd = chnl_flowctrl_cb;
409 priv->netdev = dev;
410 priv->conn_req.protocol = CAIFPROTO_DATAGRAM;
411 priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW;
412 priv->conn_req.priority = CAIF_PRIO_LOW;
413 /* Insert illegal value */
sjur.brandeland@stericsson.comb3ccfbe2011-05-13 02:44:04 +0000414 priv->conn_req.sockaddr.u.dgm.connection_id = 0;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000415 priv->flowenabled = false;
416
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000417 init_waitqueue_head(&priv->netmgmt_wq);
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000418}
419
420
421static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev)
422{
423 struct chnl_net *priv;
424 u8 loop;
425 priv = netdev_priv(dev);
426 NLA_PUT_U32(skb, IFLA_CAIF_IPV4_CONNID,
427 priv->conn_req.sockaddr.u.dgm.connection_id);
428 NLA_PUT_U32(skb, IFLA_CAIF_IPV6_CONNID,
429 priv->conn_req.sockaddr.u.dgm.connection_id);
430 loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP;
431 NLA_PUT_U8(skb, IFLA_CAIF_LOOPBACK, loop);
432
433
434 return 0;
435nla_put_failure:
436 return -EMSGSIZE;
437
438}
439
440static void caif_netlink_parms(struct nlattr *data[],
441 struct caif_connect_request *conn_req)
442{
443 if (!data) {
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000444 pr_warn("no params data found\n");
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000445 return;
446 }
447 if (data[IFLA_CAIF_IPV4_CONNID])
448 conn_req->sockaddr.u.dgm.connection_id =
449 nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]);
450 if (data[IFLA_CAIF_IPV6_CONNID])
451 conn_req->sockaddr.u.dgm.connection_id =
452 nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]);
453 if (data[IFLA_CAIF_LOOPBACK]) {
454 if (nla_get_u8(data[IFLA_CAIF_LOOPBACK]))
455 conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP;
456 else
457 conn_req->protocol = CAIFPROTO_DATAGRAM;
458 }
459}
460
461static int ipcaif_newlink(struct net *src_net, struct net_device *dev,
462 struct nlattr *tb[], struct nlattr *data[])
463{
464 int ret;
465 struct chnl_net *caifdev;
466 ASSERT_RTNL();
467 caifdev = netdev_priv(dev);
468 caif_netlink_parms(data, &caifdev->conn_req);
Sjur Braendeland8391c4a2010-04-28 08:54:39 +0000469 dev_net_set(caifdev->netdev, src_net);
470
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000471 ret = register_netdevice(dev);
472 if (ret)
Joe Perchesb31fa5b2010-09-05 21:31:11 +0000473 pr_warn("device rtml registration failed\n");
David S. Millerb2df5a842011-02-08 14:31:31 -0800474 else
475 list_add(&caifdev->list_field, &chnl_net_list);
sjur.brandeland@stericsson.comb3ccfbe2011-05-13 02:44:04 +0000476
477 /* Take ifindex as connection-id if null */
478 if (caifdev->conn_req.sockaddr.u.dgm.connection_id == 0)
479 caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex;
Sjur Braendelandcc36a072010-03-30 13:56:27 +0000480 return ret;
481}
482
483static 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
494static 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
506static 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
513static 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
526static int __init chnl_init_module(void)
527{
528 return rtnl_link_register(&ipcaif_link_ops);
529}
530
531static 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
546module_init(chnl_init_module);
547module_exit(chnl_exit_module);