Commit | Line | Data |
---|---|---|
c72dfae2 SB |
1 | /* |
2 | * CAIF Interface registration. | |
3 | * Copyright (C) ST-Ericsson AB 2010 | |
4 | * Author: Sjur Brendeland/sjur.brandeland@stericsson.com | |
5 | * License terms: GNU General Public License (GPL) version 2 | |
6 | * | |
31fdc555 | 7 | * Borrowed heavily from file: pn_dev.c. Thanks to Remi Denis-Courmont |
c72dfae2 SB |
8 | * and Sakari Ailus <sakari.ailus@nokia.com> |
9 | */ | |
10 | ||
b31fa5ba JP |
11 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s(): " fmt, __func__ |
12 | ||
c72dfae2 SB |
13 | #include <linux/kernel.h> |
14 | #include <linux/if_arp.h> | |
15 | #include <linux/net.h> | |
16 | #include <linux/netdevice.h> | |
bd30ce4b | 17 | #include <linux/mutex.h> |
3a9a231d | 18 | #include <linux/module.h> |
0e4c7d85 | 19 | #include <linux/spinlock.h> |
c72dfae2 SB |
20 | #include <net/netns/generic.h> |
21 | #include <net/net_namespace.h> | |
22 | #include <net/pkt_sched.h> | |
23 | #include <net/caif/caif_device.h> | |
c72dfae2 SB |
24 | #include <net/caif/caif_layer.h> |
25 | #include <net/caif/cfpkt.h> | |
26 | #include <net/caif/cfcnfg.h> | |
7c18d220 | 27 | #include <net/caif/cfserl.h> |
c72dfae2 SB |
28 | |
29 | MODULE_LICENSE("GPL"); | |
c72dfae2 SB |
30 | |
31 | /* Used for local tracking of the CAIF net devices */ | |
32 | struct caif_device_entry { | |
33 | struct cflayer layer; | |
34 | struct list_head list; | |
c72dfae2 | 35 | struct net_device *netdev; |
bd30ce4b | 36 | int __percpu *pcpu_refcnt; |
0e4c7d85 | 37 | spinlock_t flow_lock; |
7d311304 | 38 | struct sk_buff *xoff_skb; |
39 | void (*xoff_skb_dtor)(struct sk_buff *skb); | |
0e4c7d85 | 40 | bool xoff; |
c72dfae2 SB |
41 | }; |
42 | ||
43 | struct caif_device_entry_list { | |
44 | struct list_head list; | |
45 | /* Protects simulanous deletes in list */ | |
bd30ce4b | 46 | struct mutex lock; |
c72dfae2 SB |
47 | }; |
48 | ||
49 | struct caif_net { | |
bee925db | 50 | struct cfcnfg *cfg; |
c72dfae2 SB |
51 | struct caif_device_entry_list caifdevs; |
52 | }; | |
53 | ||
54 | static int caif_net_id; | |
0e4c7d85 | 55 | static int q_high = 50; /* Percent */ |
bee925db | 56 | |
57 | struct cfcnfg *get_cfcnfg(struct net *net) | |
58 | { | |
59 | struct caif_net *caifn; | |
bee925db | 60 | caifn = net_generic(net, caif_net_id); |
bee925db | 61 | return caifn->cfg; |
62 | } | |
63 | EXPORT_SYMBOL(get_cfcnfg); | |
c72dfae2 SB |
64 | |
65 | static struct caif_device_entry_list *caif_device_list(struct net *net) | |
66 | { | |
67 | struct caif_net *caifn; | |
c72dfae2 | 68 | caifn = net_generic(net, caif_net_id); |
c72dfae2 SB |
69 | return &caifn->caifdevs; |
70 | } | |
71 | ||
bd30ce4b | 72 | static void caifd_put(struct caif_device_entry *e) |
73 | { | |
933393f5 | 74 | this_cpu_dec(*e->pcpu_refcnt); |
bd30ce4b | 75 | } |
76 | ||
77 | static void caifd_hold(struct caif_device_entry *e) | |
78 | { | |
933393f5 | 79 | this_cpu_inc(*e->pcpu_refcnt); |
bd30ce4b | 80 | } |
81 | ||
82 | static int caifd_refcnt_read(struct caif_device_entry *e) | |
83 | { | |
84 | int i, refcnt = 0; | |
85 | for_each_possible_cpu(i) | |
86 | refcnt += *per_cpu_ptr(e->pcpu_refcnt, i); | |
87 | return refcnt; | |
88 | } | |
89 | ||
c72dfae2 SB |
90 | /* Allocate new CAIF device. */ |
91 | static struct caif_device_entry *caif_device_alloc(struct net_device *dev) | |
92 | { | |
93 | struct caif_device_entry_list *caifdevs; | |
94 | struct caif_device_entry *caifd; | |
bd30ce4b | 95 | |
c72dfae2 | 96 | caifdevs = caif_device_list(dev_net(dev)); |
bd30ce4b | 97 | |
4fb66b82 | 98 | caifd = kzalloc(sizeof(*caifd), GFP_KERNEL); |
c72dfae2 SB |
99 | if (!caifd) |
100 | return NULL; | |
bd30ce4b | 101 | caifd->pcpu_refcnt = alloc_percpu(int); |
4fb66b82 ED |
102 | if (!caifd->pcpu_refcnt) { |
103 | kfree(caifd); | |
104 | return NULL; | |
105 | } | |
c72dfae2 | 106 | caifd->netdev = dev; |
bd30ce4b | 107 | dev_hold(dev); |
c72dfae2 SB |
108 | return caifd; |
109 | } | |
110 | ||
111 | static struct caif_device_entry *caif_get(struct net_device *dev) | |
112 | { | |
113 | struct caif_device_entry_list *caifdevs = | |
114 | caif_device_list(dev_net(dev)); | |
115 | struct caif_device_entry *caifd; | |
7c18d220 | 116 | |
bd30ce4b | 117 | list_for_each_entry_rcu(caifd, &caifdevs->list, list) { |
c72dfae2 SB |
118 | if (caifd->netdev == dev) |
119 | return caifd; | |
120 | } | |
121 | return NULL; | |
122 | } | |
123 | ||
0e4c7d85 | 124 | void caif_flow_cb(struct sk_buff *skb) |
125 | { | |
126 | struct caif_device_entry *caifd; | |
7d311304 | 127 | void (*dtor)(struct sk_buff *skb) = NULL; |
0e4c7d85 | 128 | bool send_xoff; |
129 | ||
130 | WARN_ON(skb->dev == NULL); | |
131 | ||
132 | rcu_read_lock(); | |
133 | caifd = caif_get(skb->dev); | |
134 | caifd_hold(caifd); | |
135 | rcu_read_unlock(); | |
136 | ||
137 | spin_lock_bh(&caifd->flow_lock); | |
138 | send_xoff = caifd->xoff; | |
139 | caifd->xoff = 0; | |
59f608d8 | 140 | dtor = caifd->xoff_skb_dtor; |
141 | ||
142 | if (WARN_ON(caifd->xoff_skb != skb)) | |
143 | skb = NULL; | |
144 | ||
145 | caifd->xoff_skb = NULL; | |
146 | caifd->xoff_skb_dtor = NULL; | |
147 | ||
0e4c7d85 | 148 | spin_unlock_bh(&caifd->flow_lock); |
149 | ||
59f608d8 | 150 | if (dtor && skb) |
7d311304 | 151 | dtor(skb); |
152 | ||
0e4c7d85 | 153 | if (send_xoff) |
154 | caifd->layer.up-> | |
155 | ctrlcmd(caifd->layer.up, | |
156 | _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND, | |
157 | caifd->layer.id); | |
158 | caifd_put(caifd); | |
159 | } | |
160 | ||
c72dfae2 SB |
161 | static int transmit(struct cflayer *layer, struct cfpkt *pkt) |
162 | { | |
0e4c7d85 | 163 | int err, high = 0, qlen = 0; |
c72dfae2 SB |
164 | struct caif_device_entry *caifd = |
165 | container_of(layer, struct caif_device_entry, layer); | |
4dd820c0 | 166 | struct sk_buff *skb; |
0e4c7d85 | 167 | struct netdev_queue *txq; |
168 | ||
169 | rcu_read_lock_bh(); | |
4dd820c0 | 170 | |
c72dfae2 SB |
171 | skb = cfpkt_tonative(pkt); |
172 | skb->dev = caifd->netdev; | |
7c18d220 | 173 | skb_reset_network_header(skb); |
174 | skb->protocol = htons(ETH_P_CAIF); | |
0e4c7d85 | 175 | |
176 | /* Check if we need to handle xoff */ | |
177 | if (likely(caifd->netdev->tx_queue_len == 0)) | |
178 | goto noxoff; | |
179 | ||
180 | if (unlikely(caifd->xoff)) | |
181 | goto noxoff; | |
182 | ||
183 | if (likely(!netif_queue_stopped(caifd->netdev))) { | |
184 | /* If we run with a TX queue, check if the queue is too long*/ | |
185 | txq = netdev_get_tx_queue(skb->dev, 0); | |
186 | qlen = qdisc_qlen(rcu_dereference_bh(txq->qdisc)); | |
187 | ||
188 | if (likely(qlen == 0)) | |
189 | goto noxoff; | |
190 | ||
191 | high = (caifd->netdev->tx_queue_len * q_high) / 100; | |
192 | if (likely(qlen < high)) | |
193 | goto noxoff; | |
194 | } | |
195 | ||
196 | /* Hold lock while accessing xoff */ | |
197 | spin_lock_bh(&caifd->flow_lock); | |
198 | if (caifd->xoff) { | |
199 | spin_unlock_bh(&caifd->flow_lock); | |
200 | goto noxoff; | |
201 | } | |
202 | ||
203 | /* | |
204 | * Handle flow off, we do this by temporary hi-jacking this | |
205 | * skb's destructor function, and replace it with our own | |
206 | * flow-on callback. The callback will set flow-on and call | |
207 | * the original destructor. | |
208 | */ | |
209 | ||
210 | pr_debug("queue has stopped(%d) or is full (%d > %d)\n", | |
211 | netif_queue_stopped(caifd->netdev), | |
212 | qlen, high); | |
213 | caifd->xoff = 1; | |
7d311304 | 214 | caifd->xoff_skb = skb; |
215 | caifd->xoff_skb_dtor = skb->destructor; | |
216 | skb->destructor = caif_flow_cb; | |
0e4c7d85 | 217 | spin_unlock_bh(&caifd->flow_lock); |
0e4c7d85 | 218 | |
219 | caifd->layer.up->ctrlcmd(caifd->layer.up, | |
220 | _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND, | |
221 | caifd->layer.id); | |
222 | noxoff: | |
223 | rcu_read_unlock_bh(); | |
4dd820c0 | 224 | |
c85c2951 | 225 | err = dev_queue_xmit(skb); |
226 | if (err > 0) | |
227 | err = -EIO; | |
c72dfae2 | 228 | |
c85c2951 | 229 | return err; |
c72dfae2 SB |
230 | } |
231 | ||
c72dfae2 | 232 | /* |
bd30ce4b | 233 | * Stuff received packets into the CAIF stack. |
c72dfae2 SB |
234 | * On error, returns non-zero and releases the skb. |
235 | */ | |
236 | static int receive(struct sk_buff *skb, struct net_device *dev, | |
237 | struct packet_type *pkttype, struct net_device *orig_dev) | |
238 | { | |
c72dfae2 SB |
239 | struct cfpkt *pkt; |
240 | struct caif_device_entry *caifd; | |
69c867c9 | 241 | int err; |
bd30ce4b | 242 | |
c72dfae2 | 243 | pkt = cfpkt_fromnative(CAIF_DIR_IN, skb); |
bd30ce4b | 244 | |
245 | rcu_read_lock(); | |
c72dfae2 | 246 | caifd = caif_get(dev); |
c72dfae2 | 247 | |
bd30ce4b | 248 | if (!caifd || !caifd->layer.up || !caifd->layer.up->receive || |
249 | !netif_oper_up(caifd->netdev)) { | |
250 | rcu_read_unlock(); | |
251 | kfree_skb(skb); | |
c72dfae2 | 252 | return NET_RX_DROP; |
bd30ce4b | 253 | } |
254 | ||
255 | /* Hold reference to netdevice while using CAIF stack */ | |
256 | caifd_hold(caifd); | |
257 | rcu_read_unlock(); | |
c72dfae2 | 258 | |
69c867c9 | 259 | err = caifd->layer.up->receive(caifd->layer.up, pkt); |
260 | ||
261 | /* For -EILSEQ the packet is not freed so so it now */ | |
262 | if (err == -EILSEQ) | |
263 | cfpkt_destroy(pkt); | |
bd30ce4b | 264 | |
265 | /* Release reference to stack upwards */ | |
266 | caifd_put(caifd); | |
7c18d220 | 267 | |
268 | if (err != 0) | |
269 | err = NET_RX_DROP; | |
270 | return err; | |
c72dfae2 SB |
271 | } |
272 | ||
273 | static struct packet_type caif_packet_type __read_mostly = { | |
274 | .type = cpu_to_be16(ETH_P_CAIF), | |
275 | .func = receive, | |
276 | }; | |
277 | ||
278 | static void dev_flowctrl(struct net_device *dev, int on) | |
279 | { | |
bd30ce4b | 280 | struct caif_device_entry *caifd; |
281 | ||
282 | rcu_read_lock(); | |
283 | ||
284 | caifd = caif_get(dev); | |
285 | if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd) { | |
286 | rcu_read_unlock(); | |
c72dfae2 | 287 | return; |
bd30ce4b | 288 | } |
289 | ||
290 | caifd_hold(caifd); | |
291 | rcu_read_unlock(); | |
c72dfae2 SB |
292 | |
293 | caifd->layer.up->ctrlcmd(caifd->layer.up, | |
294 | on ? | |
295 | _CAIF_CTRLCMD_PHYIF_FLOW_ON_IND : | |
296 | _CAIF_CTRLCMD_PHYIF_FLOW_OFF_IND, | |
297 | caifd->layer.id); | |
bd30ce4b | 298 | caifd_put(caifd); |
c72dfae2 SB |
299 | } |
300 | ||
7c18d220 | 301 | void caif_enroll_dev(struct net_device *dev, struct caif_dev_common *caifdev, |
302 | struct cflayer *link_support, int head_room, | |
303 | struct cflayer **layer, int (**rcv_func)( | |
304 | struct sk_buff *, struct net_device *, | |
305 | struct packet_type *, struct net_device *)) | |
306 | { | |
307 | struct caif_device_entry *caifd; | |
308 | enum cfcnfg_phy_preference pref; | |
309 | struct cfcnfg *cfg = get_cfcnfg(dev_net(dev)); | |
310 | struct caif_device_entry_list *caifdevs; | |
311 | ||
312 | caifdevs = caif_device_list(dev_net(dev)); | |
7c18d220 | 313 | caifd = caif_device_alloc(dev); |
314 | if (!caifd) | |
315 | return; | |
316 | *layer = &caifd->layer; | |
0e4c7d85 | 317 | spin_lock_init(&caifd->flow_lock); |
7c18d220 | 318 | |
319 | switch (caifdev->link_select) { | |
320 | case CAIF_LINK_HIGH_BANDW: | |
321 | pref = CFPHYPREF_HIGH_BW; | |
322 | break; | |
323 | case CAIF_LINK_LOW_LATENCY: | |
324 | pref = CFPHYPREF_LOW_LAT; | |
325 | break; | |
326 | default: | |
327 | pref = CFPHYPREF_HIGH_BW; | |
328 | break; | |
329 | } | |
330 | mutex_lock(&caifdevs->lock); | |
331 | list_add_rcu(&caifd->list, &caifdevs->list); | |
332 | ||
333 | strncpy(caifd->layer.name, dev->name, | |
334 | sizeof(caifd->layer.name) - 1); | |
335 | caifd->layer.name[sizeof(caifd->layer.name) - 1] = 0; | |
336 | caifd->layer.transmit = transmit; | |
337 | cfcnfg_add_phy_layer(cfg, | |
338 | dev, | |
339 | &caifd->layer, | |
340 | pref, | |
341 | link_support, | |
342 | caifdev->use_fcs, | |
343 | head_room); | |
344 | mutex_unlock(&caifdevs->lock); | |
345 | if (rcv_func) | |
346 | *rcv_func = receive; | |
347 | } | |
7ad65bf6 | 348 | EXPORT_SYMBOL(caif_enroll_dev); |
7c18d220 | 349 | |
c72dfae2 SB |
350 | /* notify Caif of device events */ |
351 | static int caif_device_notify(struct notifier_block *me, unsigned long what, | |
352 | void *arg) | |
353 | { | |
354 | struct net_device *dev = arg; | |
355 | struct caif_device_entry *caifd = NULL; | |
356 | struct caif_dev_common *caifdev; | |
bee925db | 357 | struct cfcnfg *cfg; |
7c18d220 | 358 | struct cflayer *layer, *link_support; |
359 | int head_room = 0; | |
08613e46 | 360 | struct caif_device_entry_list *caifdevs; |
c72dfae2 | 361 | |
bee925db | 362 | cfg = get_cfcnfg(dev_net(dev)); |
7c18d220 | 363 | caifdevs = caif_device_list(dev_net(dev)); |
bee925db | 364 | |
7c18d220 | 365 | caifd = caif_get(dev); |
366 | if (caifd == NULL && dev->type != ARPHRD_CAIF) | |
367 | return 0; | |
08613e46 | 368 | |
c72dfae2 SB |
369 | switch (what) { |
370 | case NETDEV_REGISTER: | |
7c18d220 | 371 | if (caifd != NULL) |
372 | break; | |
bd30ce4b | 373 | |
c72dfae2 | 374 | caifdev = netdev_priv(dev); |
c72dfae2 | 375 | |
7c18d220 | 376 | link_support = NULL; |
377 | if (caifdev->use_frag) { | |
378 | head_room = 1; | |
379 | link_support = cfserl_create(dev->ifindex, | |
e977b4cf | 380 | caifdev->use_stx); |
7c18d220 | 381 | if (!link_support) { |
382 | pr_warn("Out of memory\n"); | |
383 | break; | |
384 | } | |
c72dfae2 | 385 | } |
7c18d220 | 386 | caif_enroll_dev(dev, caifdev, link_support, head_room, |
387 | &layer, NULL); | |
388 | caifdev->flowctrl = dev_flowctrl; | |
c72dfae2 SB |
389 | break; |
390 | ||
bd30ce4b | 391 | case NETDEV_UP: |
392 | rcu_read_lock(); | |
393 | ||
c72dfae2 | 394 | caifd = caif_get(dev); |
bd30ce4b | 395 | if (caifd == NULL) { |
396 | rcu_read_unlock(); | |
c72dfae2 | 397 | break; |
bd30ce4b | 398 | } |
c72dfae2 | 399 | |
0e4c7d85 | 400 | caifd->xoff = 0; |
bd30ce4b | 401 | cfcnfg_set_phy_state(cfg, &caifd->layer, true); |
402 | rcu_read_unlock(); | |
c72dfae2 | 403 | |
c72dfae2 SB |
404 | break; |
405 | ||
406 | case NETDEV_DOWN: | |
bd30ce4b | 407 | rcu_read_lock(); |
408 | ||
c72dfae2 | 409 | caifd = caif_get(dev); |
bd30ce4b | 410 | if (!caifd || !caifd->layer.up || !caifd->layer.up->ctrlcmd) { |
411 | rcu_read_unlock(); | |
412 | return -EINVAL; | |
413 | } | |
414 | ||
415 | cfcnfg_set_phy_state(cfg, &caifd->layer, false); | |
416 | caifd_hold(caifd); | |
417 | rcu_read_unlock(); | |
418 | ||
419 | caifd->layer.up->ctrlcmd(caifd->layer.up, | |
420 | _CAIF_CTRLCMD_PHYIF_DOWN_IND, | |
421 | caifd->layer.id); | |
7d311304 | 422 | |
423 | spin_lock_bh(&caifd->flow_lock); | |
424 | ||
425 | /* | |
426 | * Replace our xoff-destructor with original destructor. | |
427 | * We trust that skb->destructor *always* is called before | |
428 | * the skb reference is invalid. The hijacked SKB destructor | |
429 | * takes the flow_lock so manipulating the skb->destructor here | |
430 | * should be safe. | |
431 | */ | |
432 | if (caifd->xoff_skb_dtor != NULL && caifd->xoff_skb != NULL) | |
433 | caifd->xoff_skb->destructor = caifd->xoff_skb_dtor; | |
434 | ||
435 | caifd->xoff = 0; | |
436 | caifd->xoff_skb_dtor = NULL; | |
437 | caifd->xoff_skb = NULL; | |
438 | ||
439 | spin_unlock_bh(&caifd->flow_lock); | |
bd30ce4b | 440 | caifd_put(caifd); |
c72dfae2 SB |
441 | break; |
442 | ||
443 | case NETDEV_UNREGISTER: | |
bd30ce4b | 444 | mutex_lock(&caifdevs->lock); |
445 | ||
c72dfae2 | 446 | caifd = caif_get(dev); |
bd30ce4b | 447 | if (caifd == NULL) { |
448 | mutex_unlock(&caifdevs->lock); | |
f2527ec4 | 449 | break; |
bd30ce4b | 450 | } |
451 | list_del_rcu(&caifd->list); | |
452 | ||
453 | /* | |
454 | * NETDEV_UNREGISTER is called repeatedly until all reference | |
455 | * counts for the net-device are released. If references to | |
456 | * caifd is taken, simply ignore NETDEV_UNREGISTER and wait for | |
457 | * the next call to NETDEV_UNREGISTER. | |
458 | * | |
459 | * If any packets are in flight down the CAIF Stack, | |
460 | * cfcnfg_del_phy_layer will return nonzero. | |
461 | * If no packets are in flight, the CAIF Stack associated | |
462 | * with the net-device un-registering is freed. | |
463 | */ | |
464 | ||
465 | if (caifd_refcnt_read(caifd) != 0 || | |
466 | cfcnfg_del_phy_layer(cfg, &caifd->layer) != 0) { | |
467 | ||
468 | pr_info("Wait for device inuse\n"); | |
469 | /* Enrole device if CAIF Stack is still in use */ | |
470 | list_add_rcu(&caifd->list, &caifdevs->list); | |
471 | mutex_unlock(&caifdevs->lock); | |
472 | break; | |
473 | } | |
474 | ||
475 | synchronize_rcu(); | |
476 | dev_put(caifd->netdev); | |
477 | free_percpu(caifd->pcpu_refcnt); | |
478 | kfree(caifd); | |
479 | ||
480 | mutex_unlock(&caifdevs->lock); | |
c72dfae2 SB |
481 | break; |
482 | } | |
483 | return 0; | |
484 | } | |
485 | ||
486 | static struct notifier_block caif_device_notifier = { | |
487 | .notifier_call = caif_device_notify, | |
488 | .priority = 0, | |
489 | }; | |
490 | ||
c72dfae2 SB |
491 | /* Per-namespace Caif devices handling */ |
492 | static int caif_init_net(struct net *net) | |
493 | { | |
494 | struct caif_net *caifn = net_generic(net, caif_net_id); | |
495 | INIT_LIST_HEAD(&caifn->caifdevs.list); | |
bd30ce4b | 496 | mutex_init(&caifn->caifdevs.lock); |
bee925db | 497 | |
498 | caifn->cfg = cfcnfg_create(); | |
f84ea779 | 499 | if (!caifn->cfg) |
bee925db | 500 | return -ENOMEM; |
bee925db | 501 | |
c72dfae2 SB |
502 | return 0; |
503 | } | |
504 | ||
505 | static void caif_exit_net(struct net *net) | |
506 | { | |
bd30ce4b | 507 | struct caif_device_entry *caifd, *tmp; |
508 | struct caif_device_entry_list *caifdevs = | |
509 | caif_device_list(net); | |
7c18d220 | 510 | struct cfcnfg *cfg = get_cfcnfg(net); |
511 | ||
c72dfae2 | 512 | rtnl_lock(); |
bd30ce4b | 513 | mutex_lock(&caifdevs->lock); |
514 | ||
515 | list_for_each_entry_safe(caifd, tmp, &caifdevs->list, list) { | |
516 | int i = 0; | |
517 | list_del_rcu(&caifd->list); | |
518 | cfcnfg_set_phy_state(cfg, &caifd->layer, false); | |
519 | ||
520 | while (i < 10 && | |
521 | (caifd_refcnt_read(caifd) != 0 || | |
522 | cfcnfg_del_phy_layer(cfg, &caifd->layer) != 0)) { | |
523 | ||
524 | pr_info("Wait for device inuse\n"); | |
525 | msleep(250); | |
526 | i++; | |
527 | } | |
528 | synchronize_rcu(); | |
529 | dev_put(caifd->netdev); | |
530 | free_percpu(caifd->pcpu_refcnt); | |
531 | kfree(caifd); | |
c72dfae2 | 532 | } |
bee925db | 533 | cfcnfg_remove(cfg); |
bd30ce4b | 534 | |
535 | mutex_unlock(&caifdevs->lock); | |
c72dfae2 SB |
536 | rtnl_unlock(); |
537 | } | |
538 | ||
539 | static struct pernet_operations caif_net_ops = { | |
540 | .init = caif_init_net, | |
541 | .exit = caif_exit_net, | |
542 | .id = &caif_net_id, | |
543 | .size = sizeof(struct caif_net), | |
544 | }; | |
545 | ||
546 | /* Initialize Caif devices list */ | |
547 | static int __init caif_device_init(void) | |
548 | { | |
549 | int result; | |
bd30ce4b | 550 | |
8a8ee9af | 551 | result = register_pernet_subsys(&caif_net_ops); |
c72dfae2 | 552 | |
bee925db | 553 | if (result) |
c72dfae2 | 554 | return result; |
bee925db | 555 | |
c72dfae2 | 556 | register_netdevice_notifier(&caif_device_notifier); |
bee925db | 557 | dev_add_pack(&caif_packet_type); |
c72dfae2 SB |
558 | |
559 | return result; | |
c72dfae2 SB |
560 | } |
561 | ||
562 | static void __exit caif_device_exit(void) | |
563 | { | |
c72dfae2 | 564 | unregister_netdevice_notifier(&caif_device_notifier); |
bee925db | 565 | dev_remove_pack(&caif_packet_type); |
96f80d12 | 566 | unregister_pernet_subsys(&caif_net_ops); |
c72dfae2 SB |
567 | } |
568 | ||
569 | module_init(caif_device_init); | |
570 | module_exit(caif_device_exit); |