1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * Copyright (C) ST-Ericsson AB 2010 3 * Copyright (C) ST-Ericsson AB 2010
4 * Authors: Sjur Brendeland 4 * Authors: Sjur Brendeland
5 * Daniel Martensson 5 * Daniel Martensson
6 */ 6 */
7 7
8 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " f 8 #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__
9 9
10 #include <linux/fs.h> 10 #include <linux/fs.h>
11 #include <linux/init.h> 11 #include <linux/init.h>
12 #include <linux/module.h> 12 #include <linux/module.h>
13 #include <linux/netdevice.h> 13 #include <linux/netdevice.h>
14 #include <linux/if_ether.h> 14 #include <linux/if_ether.h>
15 #include <linux/ip.h> 15 #include <linux/ip.h>
16 #include <linux/sched.h> 16 #include <linux/sched.h>
17 #include <linux/sockios.h> 17 #include <linux/sockios.h>
18 #include <linux/caif/if_caif.h> 18 #include <linux/caif/if_caif.h>
19 #include <net/rtnetlink.h> 19 #include <net/rtnetlink.h>
20 #include <net/caif/caif_layer.h> 20 #include <net/caif/caif_layer.h>
21 #include <net/caif/cfpkt.h> 21 #include <net/caif/cfpkt.h>
22 #include <net/caif/caif_dev.h> 22 #include <net/caif/caif_dev.h>
23 23
24 /* GPRS PDP connection has MTU to 1500 */ 24 /* GPRS PDP connection has MTU to 1500 */
25 #define GPRS_PDP_MTU 1500 25 #define GPRS_PDP_MTU 1500
26 /* 5 sec. connect timeout */ 26 /* 5 sec. connect timeout */
27 #define CONNECT_TIMEOUT (5 * HZ) 27 #define CONNECT_TIMEOUT (5 * HZ)
28 #define CAIF_NET_DEFAULT_QUEUE_LEN 500 28 #define CAIF_NET_DEFAULT_QUEUE_LEN 500
29 #define UNDEF_CONNID 0xffffffff 29 #define UNDEF_CONNID 0xffffffff
30 30
31 /*This list is protected by the rtnl lock. */ 31 /*This list is protected by the rtnl lock. */
32 static LIST_HEAD(chnl_net_list); 32 static LIST_HEAD(chnl_net_list);
33 33
34 MODULE_DESCRIPTION("ST-Ericsson CAIF modem pro 34 MODULE_DESCRIPTION("ST-Ericsson CAIF modem protocol GPRS network device");
35 MODULE_LICENSE("GPL"); 35 MODULE_LICENSE("GPL");
36 MODULE_ALIAS_RTNL_LINK("caif"); 36 MODULE_ALIAS_RTNL_LINK("caif");
37 37
38 enum caif_states { 38 enum caif_states {
39 CAIF_CONNECTED = 1, 39 CAIF_CONNECTED = 1,
40 CAIF_CONNECTING, 40 CAIF_CONNECTING,
41 CAIF_DISCONNECTED, 41 CAIF_DISCONNECTED,
42 CAIF_SHUTDOWN 42 CAIF_SHUTDOWN
43 }; 43 };
44 44
45 struct chnl_net { 45 struct chnl_net {
46 struct cflayer chnl; 46 struct cflayer chnl;
47 struct caif_connect_request conn_req; 47 struct caif_connect_request conn_req;
48 struct list_head list_field; 48 struct list_head list_field;
49 struct net_device *netdev; 49 struct net_device *netdev;
>> 50 char name[256];
50 wait_queue_head_t netmgmt_wq; 51 wait_queue_head_t netmgmt_wq;
51 /* Flow status to remember and control 52 /* Flow status to remember and control the transmission. */
52 bool flowenabled; 53 bool flowenabled;
53 enum caif_states state; 54 enum caif_states state;
54 }; 55 };
55 56
56 static int chnl_recv_cb(struct cflayer *layr, 57 static int chnl_recv_cb(struct cflayer *layr, struct cfpkt *pkt)
57 { 58 {
58 struct sk_buff *skb; 59 struct sk_buff *skb;
59 struct chnl_net *priv; 60 struct chnl_net *priv;
60 int pktlen; 61 int pktlen;
61 const u8 *ip_version; 62 const u8 *ip_version;
62 u8 buf; 63 u8 buf;
63 64
64 priv = container_of(layr, struct chnl_ 65 priv = container_of(layr, struct chnl_net, chnl);
65 66
66 skb = (struct sk_buff *) cfpkt_tonativ 67 skb = (struct sk_buff *) cfpkt_tonative(pkt);
67 68
68 /* Get length of CAIF packet. */ 69 /* Get length of CAIF packet. */
69 pktlen = skb->len; 70 pktlen = skb->len;
70 71
71 /* Pass some minimum information and 72 /* Pass some minimum information and
72 * send the packet to the net stack. 73 * send the packet to the net stack.
73 */ 74 */
74 skb->dev = priv->netdev; 75 skb->dev = priv->netdev;
75 76
76 /* check the version of IP */ 77 /* check the version of IP */
77 ip_version = skb_header_pointer(skb, 0 78 ip_version = skb_header_pointer(skb, 0, 1, &buf);
78 if (!ip_version) { 79 if (!ip_version) {
79 kfree_skb(skb); 80 kfree_skb(skb);
80 return -EINVAL; 81 return -EINVAL;
81 } 82 }
82 83
83 switch (*ip_version >> 4) { 84 switch (*ip_version >> 4) {
84 case 4: 85 case 4:
85 skb->protocol = htons(ETH_P_IP 86 skb->protocol = htons(ETH_P_IP);
86 break; 87 break;
87 case 6: 88 case 6:
88 skb->protocol = htons(ETH_P_IP 89 skb->protocol = htons(ETH_P_IPV6);
89 break; 90 break;
90 default: 91 default:
91 kfree_skb(skb); 92 kfree_skb(skb);
92 priv->netdev->stats.rx_errors+ 93 priv->netdev->stats.rx_errors++;
93 return -EINVAL; 94 return -EINVAL;
94 } 95 }
95 96
96 /* If we change the header in loop mod 97 /* If we change the header in loop mode, the checksum is corrupted. */
97 if (priv->conn_req.protocol == CAIFPRO 98 if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
98 skb->ip_summed = CHECKSUM_UNNE 99 skb->ip_summed = CHECKSUM_UNNECESSARY;
99 else 100 else
100 skb->ip_summed = CHECKSUM_NONE 101 skb->ip_summed = CHECKSUM_NONE;
101 102
102 netif_rx(skb); 103 netif_rx(skb);
103 104
104 /* Update statistics. */ 105 /* Update statistics. */
105 priv->netdev->stats.rx_packets++; 106 priv->netdev->stats.rx_packets++;
106 priv->netdev->stats.rx_bytes += pktlen 107 priv->netdev->stats.rx_bytes += pktlen;
107 108
108 return 0; 109 return 0;
109 } 110 }
110 111
111 static int delete_device(struct chnl_net *dev) 112 static int delete_device(struct chnl_net *dev)
112 { 113 {
113 ASSERT_RTNL(); 114 ASSERT_RTNL();
114 if (dev->netdev) 115 if (dev->netdev)
115 unregister_netdevice(dev->netd 116 unregister_netdevice(dev->netdev);
116 return 0; 117 return 0;
117 } 118 }
118 119
119 static void close_work(struct work_struct *wor 120 static void close_work(struct work_struct *work)
120 { 121 {
121 struct chnl_net *dev = NULL; 122 struct chnl_net *dev = NULL;
122 struct list_head *list_node; 123 struct list_head *list_node;
123 struct list_head *_tmp; 124 struct list_head *_tmp;
124 125
125 rtnl_lock(); 126 rtnl_lock();
126 list_for_each_safe(list_node, _tmp, &c 127 list_for_each_safe(list_node, _tmp, &chnl_net_list) {
127 dev = list_entry(list_node, st 128 dev = list_entry(list_node, struct chnl_net, list_field);
128 if (dev->state == CAIF_SHUTDOW 129 if (dev->state == CAIF_SHUTDOWN)
129 dev_close(dev->netdev) 130 dev_close(dev->netdev);
130 } 131 }
131 rtnl_unlock(); 132 rtnl_unlock();
132 } 133 }
133 static DECLARE_WORK(close_worker, close_work); 134 static DECLARE_WORK(close_worker, close_work);
134 135
135 static void chnl_hold(struct cflayer *lyr) 136 static void chnl_hold(struct cflayer *lyr)
136 { 137 {
137 struct chnl_net *priv = container_of(l 138 struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl);
138 dev_hold(priv->netdev); 139 dev_hold(priv->netdev);
139 } 140 }
140 141
141 static void chnl_put(struct cflayer *lyr) 142 static void chnl_put(struct cflayer *lyr)
142 { 143 {
143 struct chnl_net *priv = container_of(l 144 struct chnl_net *priv = container_of(lyr, struct chnl_net, chnl);
144 dev_put(priv->netdev); 145 dev_put(priv->netdev);
145 } 146 }
146 147
147 static void chnl_flowctrl_cb(struct cflayer *l 148 static void chnl_flowctrl_cb(struct cflayer *layr, enum caif_ctrlcmd flow,
148 int phyid) 149 int phyid)
149 { 150 {
150 struct chnl_net *priv = container_of(l 151 struct chnl_net *priv = container_of(layr, struct chnl_net, chnl);
151 pr_debug("NET flowctrl func called flo 152 pr_debug("NET flowctrl func called flow: %s\n",
152 flow == CAIF_CTRLCMD_FLOW_ON_I 153 flow == CAIF_CTRLCMD_FLOW_ON_IND ? "ON" :
153 flow == CAIF_CTRLCMD_INIT_RSP 154 flow == CAIF_CTRLCMD_INIT_RSP ? "INIT" :
154 flow == CAIF_CTRLCMD_FLOW_OFF_ 155 flow == CAIF_CTRLCMD_FLOW_OFF_IND ? "OFF" :
155 flow == CAIF_CTRLCMD_DEINIT_RS 156 flow == CAIF_CTRLCMD_DEINIT_RSP ? "CLOSE/DEINIT" :
156 flow == CAIF_CTRLCMD_INIT_FAIL 157 flow == CAIF_CTRLCMD_INIT_FAIL_RSP ? "OPEN_FAIL" :
157 flow == CAIF_CTRLCMD_REMOTE_SH 158 flow == CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND ?
158 "REMOTE_SHUTDOWN" : "UNKNOWN 159 "REMOTE_SHUTDOWN" : "UNKNOWN CTRL COMMAND");
159 160
160 161
161 162
162 switch (flow) { 163 switch (flow) {
163 case CAIF_CTRLCMD_FLOW_OFF_IND: 164 case CAIF_CTRLCMD_FLOW_OFF_IND:
164 priv->flowenabled = false; 165 priv->flowenabled = false;
165 netif_stop_queue(priv->netdev) 166 netif_stop_queue(priv->netdev);
166 break; 167 break;
167 case CAIF_CTRLCMD_DEINIT_RSP: 168 case CAIF_CTRLCMD_DEINIT_RSP:
168 priv->state = CAIF_DISCONNECTE 169 priv->state = CAIF_DISCONNECTED;
169 break; 170 break;
170 case CAIF_CTRLCMD_INIT_FAIL_RSP: 171 case CAIF_CTRLCMD_INIT_FAIL_RSP:
171 priv->state = CAIF_DISCONNECTE 172 priv->state = CAIF_DISCONNECTED;
172 wake_up_interruptible(&priv->n 173 wake_up_interruptible(&priv->netmgmt_wq);
173 break; 174 break;
174 case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND: 175 case CAIF_CTRLCMD_REMOTE_SHUTDOWN_IND:
175 priv->state = CAIF_SHUTDOWN; 176 priv->state = CAIF_SHUTDOWN;
176 netif_tx_disable(priv->netdev) 177 netif_tx_disable(priv->netdev);
177 schedule_work(&close_worker); 178 schedule_work(&close_worker);
178 break; 179 break;
179 case CAIF_CTRLCMD_FLOW_ON_IND: 180 case CAIF_CTRLCMD_FLOW_ON_IND:
180 priv->flowenabled = true; 181 priv->flowenabled = true;
181 netif_wake_queue(priv->netdev) 182 netif_wake_queue(priv->netdev);
182 break; 183 break;
183 case CAIF_CTRLCMD_INIT_RSP: 184 case CAIF_CTRLCMD_INIT_RSP:
184 caif_client_register_refcnt(&p 185 caif_client_register_refcnt(&priv->chnl, chnl_hold, chnl_put);
185 priv->state = CAIF_CONNECTED; 186 priv->state = CAIF_CONNECTED;
186 priv->flowenabled = true; 187 priv->flowenabled = true;
187 netif_wake_queue(priv->netdev) 188 netif_wake_queue(priv->netdev);
188 wake_up_interruptible(&priv->n 189 wake_up_interruptible(&priv->netmgmt_wq);
189 break; 190 break;
190 default: 191 default:
191 break; 192 break;
192 } 193 }
193 } 194 }
194 195
195 static netdev_tx_t chnl_net_start_xmit(struct 196 static netdev_tx_t chnl_net_start_xmit(struct sk_buff *skb,
196 struct 197 struct net_device *dev)
197 { 198 {
198 struct chnl_net *priv; 199 struct chnl_net *priv;
199 struct cfpkt *pkt = NULL; 200 struct cfpkt *pkt = NULL;
200 int len; 201 int len;
201 int result = -1; 202 int result = -1;
202 /* Get our private data. */ 203 /* Get our private data. */
203 priv = netdev_priv(dev); 204 priv = netdev_priv(dev);
204 205
205 if (skb->len > priv->netdev->mtu) { 206 if (skb->len > priv->netdev->mtu) {
206 pr_warn("Size of skb exceeded 207 pr_warn("Size of skb exceeded MTU\n");
207 kfree_skb(skb); 208 kfree_skb(skb);
208 dev->stats.tx_errors++; 209 dev->stats.tx_errors++;
209 return NETDEV_TX_OK; 210 return NETDEV_TX_OK;
210 } 211 }
211 212
212 if (!priv->flowenabled) { 213 if (!priv->flowenabled) {
213 pr_debug("dropping packets flo 214 pr_debug("dropping packets flow off\n");
214 kfree_skb(skb); 215 kfree_skb(skb);
215 dev->stats.tx_dropped++; 216 dev->stats.tx_dropped++;
216 return NETDEV_TX_OK; 217 return NETDEV_TX_OK;
217 } 218 }
218 219
219 if (priv->conn_req.protocol == CAIFPRO 220 if (priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP)
220 swap(ip_hdr(skb)->saddr, ip_hd 221 swap(ip_hdr(skb)->saddr, ip_hdr(skb)->daddr);
221 222
222 /* Store original SKB length. */ 223 /* Store original SKB length. */
223 len = skb->len; 224 len = skb->len;
224 225
225 pkt = cfpkt_fromnative(CAIF_DIR_OUT, ( 226 pkt = cfpkt_fromnative(CAIF_DIR_OUT, (void *) skb);
226 227
227 /* Send the packet down the stack. */ 228 /* Send the packet down the stack. */
228 result = priv->chnl.dn->transmit(priv- 229 result = priv->chnl.dn->transmit(priv->chnl.dn, pkt);
229 if (result) { 230 if (result) {
230 dev->stats.tx_dropped++; 231 dev->stats.tx_dropped++;
231 return NETDEV_TX_OK; 232 return NETDEV_TX_OK;
232 } 233 }
233 234
234 /* Update statistics. */ 235 /* Update statistics. */
235 dev->stats.tx_packets++; 236 dev->stats.tx_packets++;
236 dev->stats.tx_bytes += len; 237 dev->stats.tx_bytes += len;
237 238
238 return NETDEV_TX_OK; 239 return NETDEV_TX_OK;
239 } 240 }
240 241
241 static int chnl_net_open(struct net_device *de 242 static int chnl_net_open(struct net_device *dev)
242 { 243 {
243 struct chnl_net *priv = NULL; 244 struct chnl_net *priv = NULL;
244 int result = -1; 245 int result = -1;
245 int llifindex, headroom, tailroom, mtu 246 int llifindex, headroom, tailroom, mtu;
246 struct net_device *lldev; 247 struct net_device *lldev;
247 ASSERT_RTNL(); 248 ASSERT_RTNL();
248 priv = netdev_priv(dev); 249 priv = netdev_priv(dev);
249 if (!priv) { 250 if (!priv) {
250 pr_debug("chnl_net_open: no pr 251 pr_debug("chnl_net_open: no priv\n");
251 return -ENODEV; 252 return -ENODEV;
252 } 253 }
253 254
254 if (priv->state != CAIF_CONNECTING) { 255 if (priv->state != CAIF_CONNECTING) {
255 priv->state = CAIF_CONNECTING; 256 priv->state = CAIF_CONNECTING;
256 result = caif_connect_client(d 257 result = caif_connect_client(dev_net(dev), &priv->conn_req,
257 258 &priv->chnl, &llifindex,
258 259 &headroom, &tailroom);
259 if (result != 0) { 260 if (result != 0) {
260 pr_debug("err: 261 pr_debug("err: "
261 "Unab 262 "Unable to register and open device,"
262 " Err 263 " Err:%d\n",
263 resul 264 result);
264 goto error; 265 goto error;
265 } 266 }
266 267
267 lldev = __dev_get_by_index(dev 268 lldev = __dev_get_by_index(dev_net(dev), llifindex);
268 269
269 if (lldev == NULL) { 270 if (lldev == NULL) {
270 pr_debug("no interface 271 pr_debug("no interface?\n");
271 result = -ENODEV; 272 result = -ENODEV;
272 goto error; 273 goto error;
273 } 274 }
274 275
275 dev->needed_tailroom = tailroo 276 dev->needed_tailroom = tailroom + lldev->needed_tailroom;
276 dev->hard_header_len = headroo 277 dev->hard_header_len = headroom + lldev->hard_header_len +
277 lldev->needed_tailroom 278 lldev->needed_tailroom;
278 279
279 /* 280 /*
280 * MTU, head-room etc is not k 281 * MTU, head-room etc is not know before we have a
281 * CAIF link layer device avai 282 * CAIF link layer device available. MTU calculation may
282 * override initial RTNL confi 283 * override initial RTNL configuration.
283 * MTU is minimum of current m 284 * MTU is minimum of current mtu, link layer mtu pluss
284 * CAIF head and tail, and PDP 285 * CAIF head and tail, and PDP GPRS contexts max MTU.
285 */ 286 */
286 mtu = min_t(int, dev->mtu, lld 287 mtu = min_t(int, dev->mtu, lldev->mtu - (headroom + tailroom));
287 mtu = min_t(int, GPRS_PDP_MTU, 288 mtu = min_t(int, GPRS_PDP_MTU, mtu);
288 dev_set_mtu(dev, mtu); 289 dev_set_mtu(dev, mtu);
289 290
290 if (mtu < 100) { 291 if (mtu < 100) {
291 pr_warn("CAIF Interfac 292 pr_warn("CAIF Interface MTU too small (%d)\n", mtu);
292 result = -ENODEV; 293 result = -ENODEV;
293 goto error; 294 goto error;
294 } 295 }
295 } 296 }
296 297
297 rtnl_unlock(); /* Release RTNL lock d 298 rtnl_unlock(); /* Release RTNL lock during connect wait */
298 299
299 result = wait_event_interruptible_time 300 result = wait_event_interruptible_timeout(priv->netmgmt_wq,
300 301 priv->state != CAIF_CONNECTING,
301 302 CONNECT_TIMEOUT);
302 303
303 rtnl_lock(); 304 rtnl_lock();
304 305
305 if (result == -ERESTARTSYS) { 306 if (result == -ERESTARTSYS) {
306 pr_debug("wait_event_interrupt 307 pr_debug("wait_event_interruptible woken by a signal\n");
307 result = -ERESTARTSYS; 308 result = -ERESTARTSYS;
308 goto error; 309 goto error;
309 } 310 }
310 311
311 if (result == 0) { 312 if (result == 0) {
312 pr_debug("connect timeout\n"); 313 pr_debug("connect timeout\n");
313 result = -ETIMEDOUT; 314 result = -ETIMEDOUT;
314 goto error; 315 goto error;
315 } 316 }
316 317
317 if (priv->state != CAIF_CONNECTED) { 318 if (priv->state != CAIF_CONNECTED) {
318 pr_debug("connect failed\n"); 319 pr_debug("connect failed\n");
319 result = -ECONNREFUSED; 320 result = -ECONNREFUSED;
320 goto error; 321 goto error;
321 } 322 }
322 pr_debug("CAIF Netdevice connected\n") 323 pr_debug("CAIF Netdevice connected\n");
323 return 0; 324 return 0;
324 325
325 error: 326 error:
326 caif_disconnect_client(dev_net(dev), & 327 caif_disconnect_client(dev_net(dev), &priv->chnl);
327 priv->state = CAIF_DISCONNECTED; 328 priv->state = CAIF_DISCONNECTED;
328 pr_debug("state disconnected\n"); 329 pr_debug("state disconnected\n");
329 return result; 330 return result;
330 331
331 } 332 }
332 333
333 static int chnl_net_stop(struct net_device *de 334 static int chnl_net_stop(struct net_device *dev)
334 { 335 {
335 struct chnl_net *priv; 336 struct chnl_net *priv;
336 337
337 ASSERT_RTNL(); 338 ASSERT_RTNL();
338 priv = netdev_priv(dev); 339 priv = netdev_priv(dev);
339 priv->state = CAIF_DISCONNECTED; 340 priv->state = CAIF_DISCONNECTED;
340 caif_disconnect_client(dev_net(dev), & 341 caif_disconnect_client(dev_net(dev), &priv->chnl);
341 return 0; 342 return 0;
342 } 343 }
343 344
344 static int chnl_net_init(struct net_device *de 345 static int chnl_net_init(struct net_device *dev)
345 { 346 {
346 struct chnl_net *priv; 347 struct chnl_net *priv;
347 ASSERT_RTNL(); 348 ASSERT_RTNL();
348 priv = netdev_priv(dev); 349 priv = netdev_priv(dev);
>> 350 strncpy(priv->name, dev->name, sizeof(priv->name));
349 INIT_LIST_HEAD(&priv->list_field); 351 INIT_LIST_HEAD(&priv->list_field);
350 return 0; 352 return 0;
351 } 353 }
352 354
353 static void chnl_net_uninit(struct net_device 355 static void chnl_net_uninit(struct net_device *dev)
354 { 356 {
355 struct chnl_net *priv; 357 struct chnl_net *priv;
356 ASSERT_RTNL(); 358 ASSERT_RTNL();
357 priv = netdev_priv(dev); 359 priv = netdev_priv(dev);
358 list_del_init(&priv->list_field); 360 list_del_init(&priv->list_field);
359 } 361 }
360 362
361 static const struct net_device_ops netdev_ops 363 static const struct net_device_ops netdev_ops = {
362 .ndo_open = chnl_net_open, 364 .ndo_open = chnl_net_open,
363 .ndo_stop = chnl_net_stop, 365 .ndo_stop = chnl_net_stop,
364 .ndo_init = chnl_net_init, 366 .ndo_init = chnl_net_init,
365 .ndo_uninit = chnl_net_uninit, 367 .ndo_uninit = chnl_net_uninit,
366 .ndo_start_xmit = chnl_net_start_xmit, 368 .ndo_start_xmit = chnl_net_start_xmit,
367 }; 369 };
368 370
369 static void chnl_net_destructor(struct net_dev 371 static void chnl_net_destructor(struct net_device *dev)
370 { 372 {
371 struct chnl_net *priv = netdev_priv(de 373 struct chnl_net *priv = netdev_priv(dev);
372 caif_free_client(&priv->chnl); 374 caif_free_client(&priv->chnl);
373 } 375 }
374 376
375 static void ipcaif_net_setup(struct net_device 377 static void ipcaif_net_setup(struct net_device *dev)
376 { 378 {
377 struct chnl_net *priv; 379 struct chnl_net *priv;
378 dev->netdev_ops = &netdev_ops; 380 dev->netdev_ops = &netdev_ops;
379 dev->needs_free_netdev = true; 381 dev->needs_free_netdev = true;
380 dev->priv_destructor = chnl_net_destru 382 dev->priv_destructor = chnl_net_destructor;
381 dev->flags |= IFF_NOARP; 383 dev->flags |= IFF_NOARP;
382 dev->flags |= IFF_POINTOPOINT; 384 dev->flags |= IFF_POINTOPOINT;
383 dev->mtu = GPRS_PDP_MTU; 385 dev->mtu = GPRS_PDP_MTU;
384 dev->tx_queue_len = CAIF_NET_DEFAULT_Q 386 dev->tx_queue_len = CAIF_NET_DEFAULT_QUEUE_LEN;
385 387
386 priv = netdev_priv(dev); 388 priv = netdev_priv(dev);
387 priv->chnl.receive = chnl_recv_cb; 389 priv->chnl.receive = chnl_recv_cb;
388 priv->chnl.ctrlcmd = chnl_flowctrl_cb; 390 priv->chnl.ctrlcmd = chnl_flowctrl_cb;
389 priv->netdev = dev; 391 priv->netdev = dev;
390 priv->conn_req.protocol = CAIFPROTO_DA 392 priv->conn_req.protocol = CAIFPROTO_DATAGRAM;
391 priv->conn_req.link_selector = CAIF_LI 393 priv->conn_req.link_selector = CAIF_LINK_HIGH_BANDW;
392 priv->conn_req.priority = CAIF_PRIO_LO 394 priv->conn_req.priority = CAIF_PRIO_LOW;
393 /* Insert illegal value */ 395 /* Insert illegal value */
394 priv->conn_req.sockaddr.u.dgm.connecti 396 priv->conn_req.sockaddr.u.dgm.connection_id = UNDEF_CONNID;
395 priv->flowenabled = false; 397 priv->flowenabled = false;
396 398
397 init_waitqueue_head(&priv->netmgmt_wq) 399 init_waitqueue_head(&priv->netmgmt_wq);
398 } 400 }
399 401
400 402
401 static int ipcaif_fill_info(struct sk_buff *sk 403 static int ipcaif_fill_info(struct sk_buff *skb, const struct net_device *dev)
402 { 404 {
403 struct chnl_net *priv; 405 struct chnl_net *priv;
404 u8 loop; 406 u8 loop;
405 priv = netdev_priv(dev); 407 priv = netdev_priv(dev);
406 if (nla_put_u32(skb, IFLA_CAIF_IPV4_CO 408 if (nla_put_u32(skb, IFLA_CAIF_IPV4_CONNID,
407 priv->conn_req.sockadd 409 priv->conn_req.sockaddr.u.dgm.connection_id) ||
408 nla_put_u32(skb, IFLA_CAIF_IPV6_CO 410 nla_put_u32(skb, IFLA_CAIF_IPV6_CONNID,
409 priv->conn_req.sockadd 411 priv->conn_req.sockaddr.u.dgm.connection_id))
410 goto nla_put_failure; 412 goto nla_put_failure;
411 loop = priv->conn_req.protocol == CAIF 413 loop = priv->conn_req.protocol == CAIFPROTO_DATAGRAM_LOOP;
412 if (nla_put_u8(skb, IFLA_CAIF_LOOPBACK 414 if (nla_put_u8(skb, IFLA_CAIF_LOOPBACK, loop))
413 goto nla_put_failure; 415 goto nla_put_failure;
414 return 0; 416 return 0;
415 nla_put_failure: 417 nla_put_failure:
416 return -EMSGSIZE; 418 return -EMSGSIZE;
417 419
418 } 420 }
419 421
420 static void caif_netlink_parms(struct nlattr * 422 static void caif_netlink_parms(struct nlattr *data[],
421 struct caif_con 423 struct caif_connect_request *conn_req)
422 { 424 {
423 if (!data) { 425 if (!data) {
424 pr_warn("no params data found\ 426 pr_warn("no params data found\n");
425 return; 427 return;
426 } 428 }
427 if (data[IFLA_CAIF_IPV4_CONNID]) 429 if (data[IFLA_CAIF_IPV4_CONNID])
428 conn_req->sockaddr.u.dgm.conne 430 conn_req->sockaddr.u.dgm.connection_id =
429 nla_get_u32(data[IFLA_ 431 nla_get_u32(data[IFLA_CAIF_IPV4_CONNID]);
430 if (data[IFLA_CAIF_IPV6_CONNID]) 432 if (data[IFLA_CAIF_IPV6_CONNID])
431 conn_req->sockaddr.u.dgm.conne 433 conn_req->sockaddr.u.dgm.connection_id =
432 nla_get_u32(data[IFLA_ 434 nla_get_u32(data[IFLA_CAIF_IPV6_CONNID]);
433 if (data[IFLA_CAIF_LOOPBACK]) { 435 if (data[IFLA_CAIF_LOOPBACK]) {
434 if (nla_get_u8(data[IFLA_CAIF_ 436 if (nla_get_u8(data[IFLA_CAIF_LOOPBACK]))
435 conn_req->protocol = C 437 conn_req->protocol = CAIFPROTO_DATAGRAM_LOOP;
436 else 438 else
437 conn_req->protocol = C 439 conn_req->protocol = CAIFPROTO_DATAGRAM;
438 } 440 }
439 } 441 }
440 442
441 static int ipcaif_newlink(struct net *src_net, 443 static int ipcaif_newlink(struct net *src_net, struct net_device *dev,
442 struct nlattr *tb[], 444 struct nlattr *tb[], struct nlattr *data[],
443 struct netlink_ext_a 445 struct netlink_ext_ack *extack)
444 { 446 {
445 int ret; 447 int ret;
446 struct chnl_net *caifdev; 448 struct chnl_net *caifdev;
447 ASSERT_RTNL(); 449 ASSERT_RTNL();
448 caifdev = netdev_priv(dev); 450 caifdev = netdev_priv(dev);
449 caif_netlink_parms(data, &caifdev->con 451 caif_netlink_parms(data, &caifdev->conn_req);
450 452
451 ret = register_netdevice(dev); 453 ret = register_netdevice(dev);
452 if (ret) 454 if (ret)
453 pr_warn("device rtml registrat 455 pr_warn("device rtml registration failed\n");
454 else 456 else
455 list_add(&caifdev->list_field, 457 list_add(&caifdev->list_field, &chnl_net_list);
456 458
457 /* Use ifindex as connection id, and u 459 /* Use ifindex as connection id, and use loopback channel default. */
458 if (caifdev->conn_req.sockaddr.u.dgm.c 460 if (caifdev->conn_req.sockaddr.u.dgm.connection_id == UNDEF_CONNID) {
459 caifdev->conn_req.sockaddr.u.d 461 caifdev->conn_req.sockaddr.u.dgm.connection_id = dev->ifindex;
460 caifdev->conn_req.protocol = C 462 caifdev->conn_req.protocol = CAIFPROTO_DATAGRAM_LOOP;
461 } 463 }
462 return ret; 464 return ret;
463 } 465 }
464 466
465 static int ipcaif_changelink(struct net_device 467 static int ipcaif_changelink(struct net_device *dev, struct nlattr *tb[],
466 struct nlattr *da 468 struct nlattr *data[],
467 struct netlink_ex 469 struct netlink_ext_ack *extack)
468 { 470 {
469 struct chnl_net *caifdev; 471 struct chnl_net *caifdev;
470 ASSERT_RTNL(); 472 ASSERT_RTNL();
471 caifdev = netdev_priv(dev); 473 caifdev = netdev_priv(dev);
472 caif_netlink_parms(data, &caifdev->con 474 caif_netlink_parms(data, &caifdev->conn_req);
473 netdev_state_change(dev); 475 netdev_state_change(dev);
474 return 0; 476 return 0;
475 } 477 }
476 478
477 static size_t ipcaif_get_size(const struct net 479 static size_t ipcaif_get_size(const struct net_device *dev)
478 { 480 {
479 return 481 return
480 /* IFLA_CAIF_IPV4_CONNID */ 482 /* IFLA_CAIF_IPV4_CONNID */
481 nla_total_size(4) + 483 nla_total_size(4) +
482 /* IFLA_CAIF_IPV6_CONNID */ 484 /* IFLA_CAIF_IPV6_CONNID */
483 nla_total_size(4) + 485 nla_total_size(4) +
484 /* IFLA_CAIF_LOOPBACK */ 486 /* IFLA_CAIF_LOOPBACK */
485 nla_total_size(2) + 487 nla_total_size(2) +
486 0; 488 0;
487 } 489 }
488 490
489 static const struct nla_policy ipcaif_policy[I 491 static const struct nla_policy ipcaif_policy[IFLA_CAIF_MAX + 1] = {
490 [IFLA_CAIF_IPV4_CONNID] = { .typ 492 [IFLA_CAIF_IPV4_CONNID] = { .type = NLA_U32 },
491 [IFLA_CAIF_IPV6_CONNID] = { .typ 493 [IFLA_CAIF_IPV6_CONNID] = { .type = NLA_U32 },
492 [IFLA_CAIF_LOOPBACK] = { .typ 494 [IFLA_CAIF_LOOPBACK] = { .type = NLA_U8 }
493 }; 495 };
494 496
495 497
496 static struct rtnl_link_ops ipcaif_link_ops __ 498 static struct rtnl_link_ops ipcaif_link_ops __read_mostly = {
497 .kind = "caif", 499 .kind = "caif",
498 .priv_size = sizeof(struct chnl_n 500 .priv_size = sizeof(struct chnl_net),
499 .setup = ipcaif_net_setup, 501 .setup = ipcaif_net_setup,
500 .maxtype = IFLA_CAIF_MAX, 502 .maxtype = IFLA_CAIF_MAX,
501 .policy = ipcaif_policy, 503 .policy = ipcaif_policy,
502 .newlink = ipcaif_newlink, 504 .newlink = ipcaif_newlink,
503 .changelink = ipcaif_changelink, 505 .changelink = ipcaif_changelink,
504 .get_size = ipcaif_get_size, 506 .get_size = ipcaif_get_size,
505 .fill_info = ipcaif_fill_info, 507 .fill_info = ipcaif_fill_info,
506 508
507 }; 509 };
508 510
509 static int __init chnl_init_module(void) 511 static int __init chnl_init_module(void)
510 { 512 {
511 return rtnl_link_register(&ipcaif_link 513 return rtnl_link_register(&ipcaif_link_ops);
512 } 514 }
513 515
514 static void __exit chnl_exit_module(void) 516 static void __exit chnl_exit_module(void)
515 { 517 {
516 struct chnl_net *dev = NULL; 518 struct chnl_net *dev = NULL;
517 struct list_head *list_node; 519 struct list_head *list_node;
518 struct list_head *_tmp; 520 struct list_head *_tmp;
519 rtnl_link_unregister(&ipcaif_link_ops) 521 rtnl_link_unregister(&ipcaif_link_ops);
520 rtnl_lock(); 522 rtnl_lock();
521 list_for_each_safe(list_node, _tmp, &c 523 list_for_each_safe(list_node, _tmp, &chnl_net_list) {
522 dev = list_entry(list_node, st 524 dev = list_entry(list_node, struct chnl_net, list_field);
523 list_del_init(list_node); 525 list_del_init(list_node);
524 delete_device(dev); 526 delete_device(dev);
525 } 527 }
526 rtnl_unlock(); 528 rtnl_unlock();
527 } 529 }
528 530
529 module_init(chnl_init_module); 531 module_init(chnl_init_module);
530 module_exit(chnl_exit_module); 532 module_exit(chnl_exit_module);
531 533
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