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