Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* net/atm/common.c - ATM sockets (common part for PVC and SVC) */ |
2 | ||
3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ | |
4 | ||
5 | ||
1da177e4 LT |
6 | #include <linux/module.h> |
7 | #include <linux/kmod.h> | |
8 | #include <linux/net.h> /* struct socket, struct proto_ops */ | |
9 | #include <linux/atm.h> /* ATM stuff */ | |
10 | #include <linux/atmdev.h> | |
11 | #include <linux/socket.h> /* SOL_SOCKET */ | |
12 | #include <linux/errno.h> /* error codes */ | |
13 | #include <linux/capability.h> | |
e49332bd | 14 | #include <linux/mm.h> |
1da177e4 LT |
15 | #include <linux/sched.h> |
16 | #include <linux/time.h> /* struct timeval */ | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/bitops.h> | |
19 | #include <linux/init.h> | |
20 | #include <net/sock.h> /* struct sock */ | |
21 | ||
22 | #include <asm/uaccess.h> | |
23 | #include <asm/atomic.h> | |
24 | #include <asm/poll.h> | |
25 | ||
26 | ||
27 | #include "resources.h" /* atm_find_dev */ | |
28 | #include "common.h" /* prototypes */ | |
29 | #include "protocols.h" /* atm_init_<transport> */ | |
30 | #include "addr.h" /* address registry */ | |
31 | #include "signaling.h" /* for WAITING and sigd_attach */ | |
32 | ||
33 | ||
34 | #if 0 | |
35 | #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) | |
36 | #else | |
37 | #define DPRINTK(format,args...) | |
38 | #endif | |
39 | ||
40 | struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; | |
41 | DEFINE_RWLOCK(vcc_sklist_lock); | |
42 | ||
43 | static void __vcc_insert_socket(struct sock *sk) | |
44 | { | |
45 | struct atm_vcc *vcc = atm_sk(sk); | |
46 | struct hlist_head *head = &vcc_hash[vcc->vci & | |
47 | (VCC_HTABLE_SIZE - 1)]; | |
81c3d547 | 48 | sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); |
1da177e4 LT |
49 | sk_add_node(sk, head); |
50 | } | |
51 | ||
52 | void vcc_insert_socket(struct sock *sk) | |
53 | { | |
54 | write_lock_irq(&vcc_sklist_lock); | |
55 | __vcc_insert_socket(sk); | |
56 | write_unlock_irq(&vcc_sklist_lock); | |
57 | } | |
58 | ||
59 | static void vcc_remove_socket(struct sock *sk) | |
60 | { | |
61 | write_lock_irq(&vcc_sklist_lock); | |
62 | sk_del_node_init(sk); | |
63 | write_unlock_irq(&vcc_sklist_lock); | |
64 | } | |
65 | ||
66 | ||
67 | static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size) | |
68 | { | |
69 | struct sk_buff *skb; | |
70 | struct sock *sk = sk_atm(vcc); | |
71 | ||
72 | if (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) { | |
73 | DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", | |
74 | atomic_read(&sk->sk_wmem_alloc), size, | |
75 | sk->sk_sndbuf); | |
76 | return NULL; | |
77 | } | |
78 | while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule(); | |
79 | DPRINTK("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc), | |
80 | skb->truesize); | |
81 | atomic_add(skb->truesize, &sk->sk_wmem_alloc); | |
82 | return skb; | |
83 | } | |
84 | ||
85 | ||
86 | EXPORT_SYMBOL(vcc_hash); | |
87 | EXPORT_SYMBOL(vcc_sklist_lock); | |
88 | EXPORT_SYMBOL(vcc_insert_socket); | |
89 | ||
90 | static void vcc_sock_destruct(struct sock *sk) | |
91 | { | |
92 | if (atomic_read(&sk->sk_rmem_alloc)) | |
93 | printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc)); | |
94 | ||
95 | if (atomic_read(&sk->sk_wmem_alloc)) | |
96 | printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc)); | |
97 | } | |
98 | ||
99 | static void vcc_def_wakeup(struct sock *sk) | |
100 | { | |
101 | read_lock(&sk->sk_callback_lock); | |
102 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) | |
103 | wake_up(sk->sk_sleep); | |
104 | read_unlock(&sk->sk_callback_lock); | |
105 | } | |
106 | ||
107 | static inline int vcc_writable(struct sock *sk) | |
108 | { | |
109 | struct atm_vcc *vcc = atm_sk(sk); | |
110 | ||
111 | return (vcc->qos.txtp.max_sdu + | |
f7d57453 | 112 | atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; |
1da177e4 LT |
113 | } |
114 | ||
115 | static void vcc_write_space(struct sock *sk) | |
f7d57453 | 116 | { |
1da177e4 LT |
117 | read_lock(&sk->sk_callback_lock); |
118 | ||
119 | if (vcc_writable(sk)) { | |
120 | if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) | |
121 | wake_up_interruptible(sk->sk_sleep); | |
122 | ||
123 | sk_wake_async(sk, 2, POLL_OUT); | |
124 | } | |
125 | ||
126 | read_unlock(&sk->sk_callback_lock); | |
127 | } | |
128 | ||
129 | static struct proto vcc_proto = { | |
130 | .name = "VCC", | |
131 | .owner = THIS_MODULE, | |
132 | .obj_size = sizeof(struct atm_vcc), | |
133 | }; | |
f7d57453 | 134 | |
1da177e4 LT |
135 | int vcc_create(struct socket *sock, int protocol, int family) |
136 | { | |
137 | struct sock *sk; | |
138 | struct atm_vcc *vcc; | |
139 | ||
140 | sock->sk = NULL; | |
141 | if (sock->type == SOCK_STREAM) | |
142 | return -EINVAL; | |
143 | sk = sk_alloc(family, GFP_KERNEL, &vcc_proto, 1); | |
144 | if (!sk) | |
145 | return -ENOMEM; | |
146 | sock_init_data(sock, sk); | |
147 | sk->sk_state_change = vcc_def_wakeup; | |
148 | sk->sk_write_space = vcc_write_space; | |
149 | ||
150 | vcc = atm_sk(sk); | |
151 | vcc->dev = NULL; | |
152 | memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc)); | |
153 | memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc)); | |
154 | vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ | |
155 | atomic_set(&sk->sk_wmem_alloc, 0); | |
156 | atomic_set(&sk->sk_rmem_alloc, 0); | |
157 | vcc->push = NULL; | |
158 | vcc->pop = NULL; | |
159 | vcc->push_oam = NULL; | |
160 | vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ | |
161 | vcc->atm_options = vcc->aal_options = 0; | |
162 | sk->sk_destruct = vcc_sock_destruct; | |
163 | return 0; | |
164 | } | |
165 | ||
166 | ||
167 | static void vcc_destroy_socket(struct sock *sk) | |
168 | { | |
169 | struct atm_vcc *vcc = atm_sk(sk); | |
170 | struct sk_buff *skb; | |
171 | ||
172 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
173 | clear_bit(ATM_VF_READY, &vcc->flags); | |
174 | if (vcc->dev) { | |
175 | if (vcc->dev->ops->close) | |
176 | vcc->dev->ops->close(vcc); | |
177 | if (vcc->push) | |
178 | vcc->push(vcc, NULL); /* atmarpd has no push */ | |
179 | ||
1da177e4 LT |
180 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
181 | atm_return(vcc,skb->truesize); | |
182 | kfree_skb(skb); | |
183 | } | |
184 | ||
185 | module_put(vcc->dev->ops->owner); | |
186 | atm_dev_put(vcc->dev); | |
187 | } | |
9301e320 CW |
188 | |
189 | vcc_remove_socket(sk); | |
1da177e4 LT |
190 | } |
191 | ||
192 | ||
193 | int vcc_release(struct socket *sock) | |
194 | { | |
195 | struct sock *sk = sock->sk; | |
196 | ||
197 | if (sk) { | |
198 | lock_sock(sk); | |
199 | vcc_destroy_socket(sock->sk); | |
200 | release_sock(sk); | |
201 | sock_put(sk); | |
202 | } | |
203 | ||
204 | return 0; | |
205 | } | |
206 | ||
207 | ||
208 | void vcc_release_async(struct atm_vcc *vcc, int reply) | |
209 | { | |
210 | struct sock *sk = sk_atm(vcc); | |
211 | ||
212 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
213 | sk->sk_shutdown |= RCV_SHUTDOWN; | |
214 | sk->sk_err = -reply; | |
215 | clear_bit(ATM_VF_WAITING, &vcc->flags); | |
216 | sk->sk_state_change(sk); | |
217 | } | |
218 | ||
219 | ||
220 | EXPORT_SYMBOL(vcc_release_async); | |
221 | ||
222 | ||
64bf69dd SG |
223 | void atm_dev_release_vccs(struct atm_dev *dev) |
224 | { | |
225 | int i; | |
226 | ||
227 | write_lock_irq(&vcc_sklist_lock); | |
228 | for (i = 0; i < VCC_HTABLE_SIZE; i++) { | |
229 | struct hlist_head *head = &vcc_hash[i]; | |
230 | struct hlist_node *node, *tmp; | |
231 | struct sock *s; | |
232 | struct atm_vcc *vcc; | |
233 | ||
234 | sk_for_each_safe(s, node, tmp, head) { | |
235 | vcc = atm_sk(s); | |
236 | if (vcc->dev == dev) { | |
237 | vcc_release_async(vcc, -EPIPE); | |
238 | sk_del_node_init(s); | |
239 | } | |
240 | } | |
241 | } | |
242 | write_unlock_irq(&vcc_sklist_lock); | |
243 | } | |
244 | ||
245 | ||
1da177e4 LT |
246 | static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) |
247 | { | |
248 | int max_sdu; | |
249 | ||
250 | if (!tp->traffic_class) return 0; | |
251 | switch (aal) { | |
252 | case ATM_AAL0: | |
253 | max_sdu = ATM_CELL_SIZE-1; | |
254 | break; | |
255 | case ATM_AAL34: | |
256 | max_sdu = ATM_MAX_AAL34_PDU; | |
257 | break; | |
258 | default: | |
259 | printk(KERN_WARNING "ATM: AAL problems ... " | |
260 | "(%d)\n",aal); | |
261 | /* fall through */ | |
262 | case ATM_AAL5: | |
263 | max_sdu = ATM_MAX_AAL5_PDU; | |
264 | } | |
265 | if (!tp->max_sdu) tp->max_sdu = max_sdu; | |
266 | else if (tp->max_sdu > max_sdu) return -EINVAL; | |
267 | if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | ||
272 | static int check_ci(struct atm_vcc *vcc, short vpi, int vci) | |
273 | { | |
274 | struct hlist_head *head = &vcc_hash[vci & | |
275 | (VCC_HTABLE_SIZE - 1)]; | |
276 | struct hlist_node *node; | |
277 | struct sock *s; | |
278 | struct atm_vcc *walk; | |
279 | ||
280 | sk_for_each(s, node, head) { | |
281 | walk = atm_sk(s); | |
282 | if (walk->dev != vcc->dev) | |
283 | continue; | |
284 | if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && | |
285 | walk->vci == vci && ((walk->qos.txtp.traffic_class != | |
286 | ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || | |
287 | (walk->qos.rxtp.traffic_class != ATM_NONE && | |
288 | vcc->qos.rxtp.traffic_class != ATM_NONE))) | |
289 | return -EADDRINUSE; | |
290 | } | |
291 | ||
292 | /* allow VCCs with same VPI/VCI iff they don't collide on | |
293 | TX/RX (but we may refuse such sharing for other reasons, | |
294 | e.g. if protocol requires to have both channels) */ | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | ||
300 | static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci) | |
301 | { | |
302 | static short p; /* poor man's per-device cache */ | |
303 | static int c; | |
304 | short old_p; | |
305 | int old_c; | |
306 | int err; | |
307 | ||
308 | if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { | |
309 | err = check_ci(vcc, *vpi, *vci); | |
310 | return err; | |
311 | } | |
312 | /* last scan may have left values out of bounds for current device */ | |
313 | if (*vpi != ATM_VPI_ANY) | |
314 | p = *vpi; | |
315 | else if (p >= 1 << vcc->dev->ci_range.vpi_bits) | |
316 | p = 0; | |
317 | if (*vci != ATM_VCI_ANY) | |
318 | c = *vci; | |
319 | else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) | |
320 | c = ATM_NOT_RSV_VCI; | |
321 | old_p = p; | |
322 | old_c = c; | |
323 | do { | |
324 | if (!check_ci(vcc, p, c)) { | |
325 | *vpi = p; | |
326 | *vci = c; | |
327 | return 0; | |
328 | } | |
329 | if (*vci == ATM_VCI_ANY) { | |
330 | c++; | |
331 | if (c >= 1 << vcc->dev->ci_range.vci_bits) | |
332 | c = ATM_NOT_RSV_VCI; | |
333 | } | |
334 | if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && | |
335 | *vpi == ATM_VPI_ANY) { | |
336 | p++; | |
337 | if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0; | |
338 | } | |
339 | } | |
340 | while (old_p != p || old_c != c); | |
341 | return -EADDRINUSE; | |
342 | } | |
343 | ||
344 | ||
345 | static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, | |
346 | int vci) | |
347 | { | |
348 | struct sock *sk = sk_atm(vcc); | |
349 | int error; | |
350 | ||
351 | if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && | |
352 | vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && | |
353 | vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) | |
354 | return -EINVAL; | |
355 | if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) | |
356 | return -EPERM; | |
64bf69dd | 357 | error = -ENODEV; |
1da177e4 | 358 | if (!try_module_get(dev->ops->owner)) |
64bf69dd | 359 | return error; |
1da177e4 LT |
360 | vcc->dev = dev; |
361 | write_lock_irq(&vcc_sklist_lock); | |
f7d57453 | 362 | if (test_bit(ATM_DF_REMOVED, &dev->flags) || |
64bf69dd | 363 | (error = find_ci(vcc, &vpi, &vci))) { |
1da177e4 LT |
364 | write_unlock_irq(&vcc_sklist_lock); |
365 | goto fail_module_put; | |
366 | } | |
367 | vcc->vpi = vpi; | |
368 | vcc->vci = vci; | |
369 | __vcc_insert_socket(sk); | |
370 | write_unlock_irq(&vcc_sklist_lock); | |
371 | switch (vcc->qos.aal) { | |
372 | case ATM_AAL0: | |
373 | error = atm_init_aal0(vcc); | |
374 | vcc->stats = &dev->stats.aal0; | |
375 | break; | |
376 | case ATM_AAL34: | |
377 | error = atm_init_aal34(vcc); | |
378 | vcc->stats = &dev->stats.aal34; | |
379 | break; | |
380 | case ATM_NO_AAL: | |
381 | /* ATM_AAL5 is also used in the "0 for default" case */ | |
382 | vcc->qos.aal = ATM_AAL5; | |
383 | /* fall through */ | |
384 | case ATM_AAL5: | |
385 | error = atm_init_aal5(vcc); | |
386 | vcc->stats = &dev->stats.aal5; | |
387 | break; | |
388 | default: | |
389 | error = -EPROTOTYPE; | |
390 | } | |
391 | if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal); | |
392 | if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal); | |
393 | if (error) | |
394 | goto fail; | |
395 | DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); | |
396 | DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class, | |
397 | vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); | |
398 | DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, | |
399 | vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu); | |
400 | ||
401 | if (dev->ops->open) { | |
402 | if ((error = dev->ops->open(vcc))) | |
403 | goto fail; | |
404 | } | |
405 | return 0; | |
406 | ||
407 | fail: | |
408 | vcc_remove_socket(sk); | |
409 | fail_module_put: | |
410 | module_put(dev->ops->owner); | |
411 | /* ensure we get dev module ref count correct */ | |
412 | vcc->dev = NULL; | |
413 | return error; | |
414 | } | |
415 | ||
416 | ||
417 | int vcc_connect(struct socket *sock, int itf, short vpi, int vci) | |
418 | { | |
419 | struct atm_dev *dev; | |
420 | struct atm_vcc *vcc = ATM_SD(sock); | |
421 | int error; | |
422 | ||
423 | DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci); | |
424 | if (sock->state == SS_CONNECTED) | |
425 | return -EISCONN; | |
426 | if (sock->state != SS_UNCONNECTED) | |
427 | return -EINVAL; | |
428 | if (!(vpi || vci)) | |
429 | return -EINVAL; | |
430 | ||
431 | if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) | |
432 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
433 | else | |
434 | if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) | |
435 | return -EINVAL; | |
436 | DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " | |
437 | "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", | |
438 | vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr, | |
439 | vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu, | |
440 | vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr, | |
441 | vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu, | |
442 | vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" : | |
443 | " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); | |
444 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) | |
445 | return -EBADFD; | |
446 | if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || | |
447 | vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) | |
448 | return -EINVAL; | |
c9933d08 | 449 | if (likely(itf != ATM_ITF_ANY)) { |
50accc9c | 450 | dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); |
1da177e4 | 451 | } else { |
1da177e4 | 452 | dev = NULL; |
57b47a53 | 453 | mutex_lock(&atm_dev_mutex); |
c9933d08 MBJ |
454 | if (!list_empty(&atm_devs)) { |
455 | dev = list_entry(atm_devs.next, struct atm_dev, dev_list); | |
1da177e4 | 456 | atm_dev_hold(dev); |
1da177e4 | 457 | } |
57b47a53 | 458 | mutex_unlock(&atm_dev_mutex); |
c9933d08 MBJ |
459 | } |
460 | if (!dev) | |
461 | return -ENODEV; | |
462 | error = __vcc_connect(vcc, dev, vpi, vci); | |
463 | if (error) { | |
464 | atm_dev_put(dev); | |
465 | return error; | |
1da177e4 LT |
466 | } |
467 | if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) | |
468 | set_bit(ATM_VF_PARTIAL,&vcc->flags); | |
469 | if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags)) | |
470 | sock->state = SS_CONNECTED; | |
471 | return 0; | |
472 | } | |
473 | ||
474 | ||
475 | int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, | |
476 | size_t size, int flags) | |
477 | { | |
478 | struct sock *sk = sock->sk; | |
479 | struct atm_vcc *vcc; | |
480 | struct sk_buff *skb; | |
481 | int copied, error = -EINVAL; | |
482 | ||
483 | if (sock->state != SS_CONNECTED) | |
484 | return -ENOTCONN; | |
485 | if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ | |
486 | return -EOPNOTSUPP; | |
487 | vcc = ATM_SD(sock); | |
488 | if (test_bit(ATM_VF_RELEASED,&vcc->flags) || | |
489 | test_bit(ATM_VF_CLOSE,&vcc->flags) || | |
490 | !test_bit(ATM_VF_READY, &vcc->flags)) | |
491 | return 0; | |
492 | ||
493 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); | |
494 | if (!skb) | |
495 | return error; | |
496 | ||
f7d57453 | 497 | copied = skb->len; |
1da177e4 | 498 | if (copied > size) { |
f7d57453 | 499 | copied = size; |
1da177e4 LT |
500 | msg->msg_flags |= MSG_TRUNC; |
501 | } | |
502 | ||
f7d57453 YH |
503 | error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
504 | if (error) | |
505 | return error; | |
506 | sock_recv_timestamp(msg, sk, skb); | |
507 | DPRINTK("RcvM %d -= %d\n", atomic_read(&sk->rmem_alloc), skb->truesize); | |
508 | atm_return(vcc, skb->truesize); | |
509 | skb_free_datagram(sk, skb); | |
510 | return copied; | |
1da177e4 LT |
511 | } |
512 | ||
513 | ||
514 | int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, | |
515 | size_t total_len) | |
516 | { | |
517 | struct sock *sk = sock->sk; | |
518 | DEFINE_WAIT(wait); | |
519 | struct atm_vcc *vcc; | |
520 | struct sk_buff *skb; | |
521 | int eff,error; | |
522 | const void __user *buff; | |
523 | int size; | |
524 | ||
525 | lock_sock(sk); | |
526 | if (sock->state != SS_CONNECTED) { | |
527 | error = -ENOTCONN; | |
528 | goto out; | |
529 | } | |
530 | if (m->msg_name) { | |
531 | error = -EISCONN; | |
532 | goto out; | |
533 | } | |
534 | if (m->msg_iovlen != 1) { | |
535 | error = -ENOSYS; /* fix this later @@@ */ | |
536 | goto out; | |
537 | } | |
538 | buff = m->msg_iov->iov_base; | |
539 | size = m->msg_iov->iov_len; | |
540 | vcc = ATM_SD(sock); | |
541 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || | |
542 | test_bit(ATM_VF_CLOSE, &vcc->flags) || | |
543 | !test_bit(ATM_VF_READY, &vcc->flags)) { | |
544 | error = -EPIPE; | |
545 | send_sig(SIGPIPE, current, 0); | |
546 | goto out; | |
547 | } | |
548 | if (!size) { | |
549 | error = 0; | |
550 | goto out; | |
551 | } | |
552 | if (size < 0 || size > vcc->qos.txtp.max_sdu) { | |
553 | error = -EMSGSIZE; | |
554 | goto out; | |
555 | } | |
e49332bd | 556 | |
1da177e4 LT |
557 | eff = (size+3) & ~3; /* align to word boundary */ |
558 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
559 | error = 0; | |
560 | while (!(skb = alloc_tx(vcc,eff))) { | |
561 | if (m->msg_flags & MSG_DONTWAIT) { | |
562 | error = -EAGAIN; | |
563 | break; | |
564 | } | |
565 | schedule(); | |
566 | if (signal_pending(current)) { | |
567 | error = -ERESTARTSYS; | |
568 | break; | |
569 | } | |
570 | if (test_bit(ATM_VF_RELEASED,&vcc->flags) || | |
571 | test_bit(ATM_VF_CLOSE,&vcc->flags) || | |
572 | !test_bit(ATM_VF_READY,&vcc->flags)) { | |
573 | error = -EPIPE; | |
574 | send_sig(SIGPIPE, current, 0); | |
575 | break; | |
576 | } | |
577 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
578 | } | |
579 | finish_wait(sk->sk_sleep, &wait); | |
580 | if (error) | |
581 | goto out; | |
582 | skb->dev = NULL; /* for paths shared with net_device interfaces */ | |
583 | ATM_SKB(skb)->atm_options = vcc->atm_options; | |
584 | if (copy_from_user(skb_put(skb,size),buff,size)) { | |
585 | kfree_skb(skb); | |
586 | error = -EFAULT; | |
587 | goto out; | |
588 | } | |
589 | if (eff != size) memset(skb->data+size,0,eff-size); | |
590 | error = vcc->dev->ops->send(vcc,skb); | |
591 | error = error ? error : size; | |
592 | out: | |
593 | release_sock(sk); | |
594 | return error; | |
595 | } | |
596 | ||
597 | ||
598 | unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) | |
599 | { | |
600 | struct sock *sk = sock->sk; | |
601 | struct atm_vcc *vcc; | |
602 | unsigned int mask; | |
603 | ||
604 | poll_wait(file, sk->sk_sleep, wait); | |
605 | mask = 0; | |
606 | ||
607 | vcc = ATM_SD(sock); | |
608 | ||
609 | /* exceptional events */ | |
610 | if (sk->sk_err) | |
611 | mask = POLLERR; | |
612 | ||
613 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || | |
614 | test_bit(ATM_VF_CLOSE, &vcc->flags)) | |
615 | mask |= POLLHUP; | |
616 | ||
617 | /* readable? */ | |
618 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
619 | mask |= POLLIN | POLLRDNORM; | |
620 | ||
621 | /* writable? */ | |
622 | if (sock->state == SS_CONNECTING && | |
623 | test_bit(ATM_VF_WAITING, &vcc->flags)) | |
624 | return mask; | |
625 | ||
626 | if (vcc->qos.txtp.traffic_class != ATM_NONE && | |
627 | vcc_writable(sk)) | |
628 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
629 | ||
630 | return mask; | |
631 | } | |
632 | ||
633 | ||
634 | static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) | |
635 | { | |
636 | int error; | |
637 | ||
638 | /* | |
639 | * Don't let the QoS change the already connected AAL type nor the | |
640 | * traffic class. | |
641 | */ | |
642 | if (qos->aal != vcc->qos.aal || | |
643 | qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || | |
644 | qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) | |
645 | return -EINVAL; | |
646 | error = adjust_tp(&qos->txtp,qos->aal); | |
647 | if (!error) error = adjust_tp(&qos->rxtp,qos->aal); | |
648 | if (error) return error; | |
649 | if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP; | |
650 | if (sk_atm(vcc)->sk_family == AF_ATMPVC) | |
651 | return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET); | |
652 | return svc_change_qos(vcc,qos); | |
653 | } | |
654 | ||
655 | ||
656 | static int check_tp(struct atm_trafprm *tp) | |
657 | { | |
658 | /* @@@ Should be merged with adjust_tp */ | |
659 | if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0; | |
660 | if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && | |
661 | !tp->max_pcr) return -EINVAL; | |
662 | if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL; | |
663 | if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && | |
664 | tp->min_pcr > tp->max_pcr) return -EINVAL; | |
665 | /* | |
666 | * We allow pcr to be outside [min_pcr,max_pcr], because later | |
667 | * adjustment may still push it in the valid range. | |
668 | */ | |
669 | return 0; | |
670 | } | |
671 | ||
672 | ||
673 | static int check_qos(struct atm_qos *qos) | |
674 | { | |
675 | int error; | |
676 | ||
677 | if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) | |
f7d57453 | 678 | return -EINVAL; |
1da177e4 LT |
679 | if (qos->txtp.traffic_class != qos->rxtp.traffic_class && |
680 | qos->txtp.traffic_class && qos->rxtp.traffic_class && | |
681 | qos->txtp.traffic_class != ATM_ANYCLASS && | |
682 | qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL; | |
683 | error = check_tp(&qos->txtp); | |
684 | if (error) return error; | |
685 | return check_tp(&qos->rxtp); | |
686 | } | |
687 | ||
688 | int vcc_setsockopt(struct socket *sock, int level, int optname, | |
689 | char __user *optval, int optlen) | |
690 | { | |
691 | struct atm_vcc *vcc; | |
692 | unsigned long value; | |
693 | int error; | |
694 | ||
695 | if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) | |
696 | return -EINVAL; | |
697 | ||
698 | vcc = ATM_SD(sock); | |
699 | switch (optname) { | |
700 | case SO_ATMQOS: | |
701 | { | |
702 | struct atm_qos qos; | |
703 | ||
704 | if (copy_from_user(&qos,optval,sizeof(qos))) | |
705 | return -EFAULT; | |
706 | error = check_qos(&qos); | |
707 | if (error) return error; | |
708 | if (sock->state == SS_CONNECTED) | |
709 | return atm_change_qos(vcc,&qos); | |
710 | if (sock->state != SS_UNCONNECTED) | |
711 | return -EBADFD; | |
712 | vcc->qos = qos; | |
713 | set_bit(ATM_VF_HASQOS,&vcc->flags); | |
714 | return 0; | |
715 | } | |
716 | case SO_SETCLP: | |
717 | if (get_user(value,(unsigned long __user *)optval)) | |
718 | return -EFAULT; | |
719 | if (value) vcc->atm_options |= ATM_ATMOPT_CLP; | |
720 | else vcc->atm_options &= ~ATM_ATMOPT_CLP; | |
721 | return 0; | |
722 | default: | |
723 | if (level == SOL_SOCKET) return -EINVAL; | |
724 | break; | |
725 | } | |
726 | if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL; | |
727 | return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen); | |
728 | } | |
729 | ||
730 | ||
731 | int vcc_getsockopt(struct socket *sock, int level, int optname, | |
732 | char __user *optval, int __user *optlen) | |
733 | { | |
734 | struct atm_vcc *vcc; | |
735 | int len; | |
736 | ||
737 | if (get_user(len, optlen)) | |
738 | return -EFAULT; | |
739 | if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) | |
740 | return -EINVAL; | |
741 | ||
742 | vcc = ATM_SD(sock); | |
743 | switch (optname) { | |
744 | case SO_ATMQOS: | |
745 | if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) | |
746 | return -EINVAL; | |
747 | return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ? | |
748 | -EFAULT : 0; | |
749 | case SO_SETCLP: | |
750 | return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : | |
751 | 0,(unsigned long __user *)optval) ? -EFAULT : 0; | |
752 | case SO_ATMPVC: | |
753 | { | |
754 | struct sockaddr_atmpvc pvc; | |
755 | ||
756 | if (!vcc->dev || | |
757 | !test_bit(ATM_VF_ADDR,&vcc->flags)) | |
758 | return -ENOTCONN; | |
759 | pvc.sap_family = AF_ATMPVC; | |
760 | pvc.sap_addr.itf = vcc->dev->number; | |
761 | pvc.sap_addr.vpi = vcc->vpi; | |
762 | pvc.sap_addr.vci = vcc->vci; | |
763 | return copy_to_user(optval,&pvc,sizeof(pvc)) ? | |
764 | -EFAULT : 0; | |
765 | } | |
766 | default: | |
767 | if (level == SOL_SOCKET) return -EINVAL; | |
768 | break; | |
769 | } | |
770 | if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL; | |
771 | return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); | |
772 | } | |
773 | ||
774 | static int __init atm_init(void) | |
775 | { | |
776 | int error; | |
777 | ||
778 | if ((error = proto_register(&vcc_proto, 0)) < 0) | |
779 | goto out; | |
780 | ||
781 | if ((error = atmpvc_init()) < 0) { | |
782 | printk(KERN_ERR "atmpvc_init() failed with %d\n", error); | |
783 | goto out_unregister_vcc_proto; | |
784 | } | |
785 | if ((error = atmsvc_init()) < 0) { | |
786 | printk(KERN_ERR "atmsvc_init() failed with %d\n", error); | |
787 | goto out_atmpvc_exit; | |
788 | } | |
f7d57453 | 789 | if ((error = atm_proc_init()) < 0) { |
1da177e4 LT |
790 | printk(KERN_ERR "atm_proc_init() failed with %d\n",error); |
791 | goto out_atmsvc_exit; | |
792 | } | |
f7d57453 | 793 | if ((error = atm_sysfs_init()) < 0) { |
656d98b0 RK |
794 | printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error); |
795 | goto out_atmproc_exit; | |
796 | } | |
1da177e4 LT |
797 | out: |
798 | return error; | |
656d98b0 RK |
799 | out_atmproc_exit: |
800 | atm_proc_exit(); | |
1da177e4 LT |
801 | out_atmsvc_exit: |
802 | atmsvc_exit(); | |
803 | out_atmpvc_exit: | |
804 | atmsvc_exit(); | |
805 | out_unregister_vcc_proto: | |
806 | proto_unregister(&vcc_proto); | |
807 | goto out; | |
808 | } | |
809 | ||
810 | static void __exit atm_exit(void) | |
811 | { | |
812 | atm_proc_exit(); | |
656d98b0 | 813 | atm_sysfs_exit(); |
1da177e4 LT |
814 | atmsvc_exit(); |
815 | atmpvc_exit(); | |
816 | proto_unregister(&vcc_proto); | |
817 | } | |
818 | ||
84ff602e DW |
819 | subsys_initcall(atm_init); |
820 | ||
1da177e4 LT |
821 | module_exit(atm_exit); |
822 | ||
823 | MODULE_LICENSE("GPL"); | |
824 | MODULE_ALIAS_NETPROTO(PF_ATMPVC); | |
825 | MODULE_ALIAS_NETPROTO(PF_ATMSVC); |