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