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 | ||
1da177e4 LT |
33 | struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; |
34 | DEFINE_RWLOCK(vcc_sklist_lock); | |
35 | ||
36 | static void __vcc_insert_socket(struct sock *sk) | |
37 | { | |
38 | struct atm_vcc *vcc = atm_sk(sk); | |
39 | struct hlist_head *head = &vcc_hash[vcc->vci & | |
40 | (VCC_HTABLE_SIZE - 1)]; | |
81c3d547 | 41 | sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); |
1da177e4 LT |
42 | sk_add_node(sk, head); |
43 | } | |
44 | ||
45 | void vcc_insert_socket(struct sock *sk) | |
46 | { | |
47 | write_lock_irq(&vcc_sklist_lock); | |
48 | __vcc_insert_socket(sk); | |
49 | write_unlock_irq(&vcc_sklist_lock); | |
50 | } | |
51 | ||
52 | static void vcc_remove_socket(struct sock *sk) | |
53 | { | |
54 | write_lock_irq(&vcc_sklist_lock); | |
55 | sk_del_node_init(sk); | |
56 | write_unlock_irq(&vcc_sklist_lock); | |
57 | } | |
58 | ||
59 | ||
60 | static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size) | |
61 | { | |
62 | struct sk_buff *skb; | |
63 | struct sock *sk = sk_atm(vcc); | |
64 | ||
81e2a3d5 | 65 | if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) { |
52240062 | 66 | pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", |
81e2a3d5 | 67 | sk_wmem_alloc_get(sk), size, |
1da177e4 LT |
68 | sk->sk_sndbuf); |
69 | return NULL; | |
70 | } | |
81e2a3d5 ED |
71 | while (!(skb = alloc_skb(size, GFP_KERNEL))) |
72 | schedule(); | |
73 | pr_debug("AlTx %d += %d\n", sk_wmem_alloc_get(sk), skb->truesize); | |
1da177e4 LT |
74 | atomic_add(skb->truesize, &sk->sk_wmem_alloc); |
75 | return skb; | |
76 | } | |
77 | ||
78 | ||
79 | EXPORT_SYMBOL(vcc_hash); | |
80 | EXPORT_SYMBOL(vcc_sklist_lock); | |
81 | EXPORT_SYMBOL(vcc_insert_socket); | |
82 | ||
83 | static void vcc_sock_destruct(struct sock *sk) | |
84 | { | |
85 | if (atomic_read(&sk->sk_rmem_alloc)) | |
86 | printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc)); | |
87 | ||
88 | if (atomic_read(&sk->sk_wmem_alloc)) | |
89 | printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc)); | |
90 | } | |
91 | ||
92 | static void vcc_def_wakeup(struct sock *sk) | |
93 | { | |
94 | read_lock(&sk->sk_callback_lock); | |
a57de0b4 | 95 | if (sk_has_sleeper(sk)) |
1da177e4 LT |
96 | wake_up(sk->sk_sleep); |
97 | read_unlock(&sk->sk_callback_lock); | |
98 | } | |
99 | ||
100 | static inline int vcc_writable(struct sock *sk) | |
101 | { | |
102 | struct atm_vcc *vcc = atm_sk(sk); | |
103 | ||
104 | return (vcc->qos.txtp.max_sdu + | |
f7d57453 | 105 | atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; |
1da177e4 LT |
106 | } |
107 | ||
108 | static void vcc_write_space(struct sock *sk) | |
f7d57453 | 109 | { |
1da177e4 LT |
110 | read_lock(&sk->sk_callback_lock); |
111 | ||
112 | if (vcc_writable(sk)) { | |
a57de0b4 | 113 | if (sk_has_sleeper(sk)) |
1da177e4 LT |
114 | wake_up_interruptible(sk->sk_sleep); |
115 | ||
8d8ad9d7 | 116 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
1da177e4 LT |
117 | } |
118 | ||
119 | read_unlock(&sk->sk_callback_lock); | |
120 | } | |
121 | ||
122 | static struct proto vcc_proto = { | |
123 | .name = "VCC", | |
124 | .owner = THIS_MODULE, | |
125 | .obj_size = sizeof(struct atm_vcc), | |
126 | }; | |
f7d57453 | 127 | |
1b8d7ae4 | 128 | int vcc_create(struct net *net, struct socket *sock, int protocol, int family) |
1da177e4 LT |
129 | { |
130 | struct sock *sk; | |
131 | struct atm_vcc *vcc; | |
132 | ||
133 | sock->sk = NULL; | |
134 | if (sock->type == SOCK_STREAM) | |
135 | return -EINVAL; | |
6257ff21 | 136 | sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto); |
1da177e4 LT |
137 | if (!sk) |
138 | return -ENOMEM; | |
139 | sock_init_data(sock, sk); | |
140 | sk->sk_state_change = vcc_def_wakeup; | |
141 | sk->sk_write_space = vcc_write_space; | |
142 | ||
143 | vcc = atm_sk(sk); | |
144 | vcc->dev = NULL; | |
145 | memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc)); | |
146 | memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc)); | |
147 | vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ | |
81e2a3d5 | 148 | atomic_set(&sk->sk_wmem_alloc, 1); |
1da177e4 LT |
149 | atomic_set(&sk->sk_rmem_alloc, 0); |
150 | vcc->push = NULL; | |
151 | vcc->pop = NULL; | |
152 | vcc->push_oam = NULL; | |
153 | vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ | |
154 | vcc->atm_options = vcc->aal_options = 0; | |
155 | sk->sk_destruct = vcc_sock_destruct; | |
156 | return 0; | |
157 | } | |
158 | ||
159 | ||
160 | static void vcc_destroy_socket(struct sock *sk) | |
161 | { | |
162 | struct atm_vcc *vcc = atm_sk(sk); | |
163 | struct sk_buff *skb; | |
164 | ||
165 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
166 | clear_bit(ATM_VF_READY, &vcc->flags); | |
167 | if (vcc->dev) { | |
168 | if (vcc->dev->ops->close) | |
169 | vcc->dev->ops->close(vcc); | |
170 | if (vcc->push) | |
171 | vcc->push(vcc, NULL); /* atmarpd has no push */ | |
172 | ||
1da177e4 LT |
173 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
174 | atm_return(vcc,skb->truesize); | |
175 | kfree_skb(skb); | |
176 | } | |
177 | ||
178 | module_put(vcc->dev->ops->owner); | |
179 | atm_dev_put(vcc->dev); | |
180 | } | |
9301e320 CW |
181 | |
182 | vcc_remove_socket(sk); | |
1da177e4 LT |
183 | } |
184 | ||
185 | ||
186 | int vcc_release(struct socket *sock) | |
187 | { | |
188 | struct sock *sk = sock->sk; | |
189 | ||
190 | if (sk) { | |
191 | lock_sock(sk); | |
192 | vcc_destroy_socket(sock->sk); | |
193 | release_sock(sk); | |
194 | sock_put(sk); | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
200 | ||
201 | void vcc_release_async(struct atm_vcc *vcc, int reply) | |
202 | { | |
203 | struct sock *sk = sk_atm(vcc); | |
204 | ||
205 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
206 | sk->sk_shutdown |= RCV_SHUTDOWN; | |
207 | sk->sk_err = -reply; | |
208 | clear_bit(ATM_VF_WAITING, &vcc->flags); | |
209 | sk->sk_state_change(sk); | |
210 | } | |
211 | ||
212 | ||
213 | EXPORT_SYMBOL(vcc_release_async); | |
214 | ||
215 | ||
64bf69dd SG |
216 | void atm_dev_release_vccs(struct atm_dev *dev) |
217 | { | |
218 | int i; | |
219 | ||
220 | write_lock_irq(&vcc_sklist_lock); | |
221 | for (i = 0; i < VCC_HTABLE_SIZE; i++) { | |
222 | struct hlist_head *head = &vcc_hash[i]; | |
223 | struct hlist_node *node, *tmp; | |
224 | struct sock *s; | |
225 | struct atm_vcc *vcc; | |
226 | ||
227 | sk_for_each_safe(s, node, tmp, head) { | |
228 | vcc = atm_sk(s); | |
229 | if (vcc->dev == dev) { | |
230 | vcc_release_async(vcc, -EPIPE); | |
231 | sk_del_node_init(s); | |
232 | } | |
233 | } | |
234 | } | |
235 | write_unlock_irq(&vcc_sklist_lock); | |
236 | } | |
237 | ||
238 | ||
1da177e4 LT |
239 | static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) |
240 | { | |
241 | int max_sdu; | |
242 | ||
243 | if (!tp->traffic_class) return 0; | |
244 | switch (aal) { | |
245 | case ATM_AAL0: | |
246 | max_sdu = ATM_CELL_SIZE-1; | |
247 | break; | |
248 | case ATM_AAL34: | |
249 | max_sdu = ATM_MAX_AAL34_PDU; | |
250 | break; | |
251 | default: | |
252 | printk(KERN_WARNING "ATM: AAL problems ... " | |
253 | "(%d)\n",aal); | |
254 | /* fall through */ | |
255 | case ATM_AAL5: | |
256 | max_sdu = ATM_MAX_AAL5_PDU; | |
257 | } | |
258 | if (!tp->max_sdu) tp->max_sdu = max_sdu; | |
259 | else if (tp->max_sdu > max_sdu) return -EINVAL; | |
260 | if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV; | |
261 | return 0; | |
262 | } | |
263 | ||
264 | ||
61c33e01 | 265 | static int check_ci(const struct atm_vcc *vcc, short vpi, int vci) |
1da177e4 LT |
266 | { |
267 | struct hlist_head *head = &vcc_hash[vci & | |
268 | (VCC_HTABLE_SIZE - 1)]; | |
269 | struct hlist_node *node; | |
270 | struct sock *s; | |
271 | struct atm_vcc *walk; | |
272 | ||
273 | sk_for_each(s, node, head) { | |
274 | walk = atm_sk(s); | |
275 | if (walk->dev != vcc->dev) | |
276 | continue; | |
277 | if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && | |
278 | walk->vci == vci && ((walk->qos.txtp.traffic_class != | |
279 | ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || | |
280 | (walk->qos.rxtp.traffic_class != ATM_NONE && | |
281 | vcc->qos.rxtp.traffic_class != ATM_NONE))) | |
282 | return -EADDRINUSE; | |
283 | } | |
284 | ||
285 | /* allow VCCs with same VPI/VCI iff they don't collide on | |
286 | TX/RX (but we may refuse such sharing for other reasons, | |
287 | e.g. if protocol requires to have both channels) */ | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
292 | ||
61c33e01 | 293 | static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci) |
1da177e4 LT |
294 | { |
295 | static short p; /* poor man's per-device cache */ | |
296 | static int c; | |
297 | short old_p; | |
298 | int old_c; | |
299 | int err; | |
300 | ||
301 | if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { | |
302 | err = check_ci(vcc, *vpi, *vci); | |
303 | return err; | |
304 | } | |
305 | /* last scan may have left values out of bounds for current device */ | |
306 | if (*vpi != ATM_VPI_ANY) | |
307 | p = *vpi; | |
308 | else if (p >= 1 << vcc->dev->ci_range.vpi_bits) | |
309 | p = 0; | |
310 | if (*vci != ATM_VCI_ANY) | |
311 | c = *vci; | |
312 | else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) | |
313 | c = ATM_NOT_RSV_VCI; | |
314 | old_p = p; | |
315 | old_c = c; | |
316 | do { | |
317 | if (!check_ci(vcc, p, c)) { | |
318 | *vpi = p; | |
319 | *vci = c; | |
320 | return 0; | |
321 | } | |
322 | if (*vci == ATM_VCI_ANY) { | |
323 | c++; | |
324 | if (c >= 1 << vcc->dev->ci_range.vci_bits) | |
325 | c = ATM_NOT_RSV_VCI; | |
326 | } | |
327 | if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && | |
328 | *vpi == ATM_VPI_ANY) { | |
329 | p++; | |
330 | if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0; | |
331 | } | |
332 | } | |
333 | while (old_p != p || old_c != c); | |
334 | return -EADDRINUSE; | |
335 | } | |
336 | ||
337 | ||
338 | static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, | |
339 | int vci) | |
340 | { | |
341 | struct sock *sk = sk_atm(vcc); | |
342 | int error; | |
343 | ||
344 | if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && | |
345 | vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && | |
346 | vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) | |
347 | return -EINVAL; | |
348 | if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) | |
349 | return -EPERM; | |
64bf69dd | 350 | error = -ENODEV; |
1da177e4 | 351 | if (!try_module_get(dev->ops->owner)) |
64bf69dd | 352 | return error; |
1da177e4 LT |
353 | vcc->dev = dev; |
354 | write_lock_irq(&vcc_sklist_lock); | |
f7d57453 | 355 | if (test_bit(ATM_DF_REMOVED, &dev->flags) || |
64bf69dd | 356 | (error = find_ci(vcc, &vpi, &vci))) { |
1da177e4 LT |
357 | write_unlock_irq(&vcc_sklist_lock); |
358 | goto fail_module_put; | |
359 | } | |
360 | vcc->vpi = vpi; | |
361 | vcc->vci = vci; | |
362 | __vcc_insert_socket(sk); | |
363 | write_unlock_irq(&vcc_sklist_lock); | |
364 | switch (vcc->qos.aal) { | |
365 | case ATM_AAL0: | |
366 | error = atm_init_aal0(vcc); | |
367 | vcc->stats = &dev->stats.aal0; | |
368 | break; | |
369 | case ATM_AAL34: | |
370 | error = atm_init_aal34(vcc); | |
371 | vcc->stats = &dev->stats.aal34; | |
372 | break; | |
373 | case ATM_NO_AAL: | |
374 | /* ATM_AAL5 is also used in the "0 for default" case */ | |
375 | vcc->qos.aal = ATM_AAL5; | |
376 | /* fall through */ | |
377 | case ATM_AAL5: | |
378 | error = atm_init_aal5(vcc); | |
379 | vcc->stats = &dev->stats.aal5; | |
380 | break; | |
381 | default: | |
382 | error = -EPROTOTYPE; | |
383 | } | |
384 | if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal); | |
385 | if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal); | |
386 | if (error) | |
387 | goto fail; | |
52240062 SH |
388 | pr_debug("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); |
389 | pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class, | |
1da177e4 | 390 | vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); |
52240062 | 391 | pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, |
1da177e4 LT |
392 | vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu); |
393 | ||
394 | if (dev->ops->open) { | |
395 | if ((error = dev->ops->open(vcc))) | |
396 | goto fail; | |
397 | } | |
398 | return 0; | |
399 | ||
400 | fail: | |
401 | vcc_remove_socket(sk); | |
402 | fail_module_put: | |
403 | module_put(dev->ops->owner); | |
404 | /* ensure we get dev module ref count correct */ | |
405 | vcc->dev = NULL; | |
406 | return error; | |
407 | } | |
408 | ||
409 | ||
410 | int vcc_connect(struct socket *sock, int itf, short vpi, int vci) | |
411 | { | |
412 | struct atm_dev *dev; | |
413 | struct atm_vcc *vcc = ATM_SD(sock); | |
414 | int error; | |
415 | ||
52240062 | 416 | pr_debug("vcc_connect (vpi %d, vci %d)\n",vpi,vci); |
1da177e4 LT |
417 | if (sock->state == SS_CONNECTED) |
418 | return -EISCONN; | |
419 | if (sock->state != SS_UNCONNECTED) | |
420 | return -EINVAL; | |
421 | if (!(vpi || vci)) | |
422 | return -EINVAL; | |
423 | ||
424 | if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) | |
425 | clear_bit(ATM_VF_PARTIAL,&vcc->flags); | |
426 | else | |
427 | if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) | |
428 | return -EINVAL; | |
52240062 | 429 | pr_debug("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " |
1da177e4 LT |
430 | "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", |
431 | vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr, | |
432 | vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu, | |
433 | vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr, | |
434 | vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu, | |
435 | vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" : | |
436 | " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); | |
437 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) | |
438 | return -EBADFD; | |
439 | if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || | |
440 | vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) | |
441 | return -EINVAL; | |
c9933d08 | 442 | if (likely(itf != ATM_ITF_ANY)) { |
50accc9c | 443 | dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); |
1da177e4 | 444 | } else { |
1da177e4 | 445 | dev = NULL; |
57b47a53 | 446 | mutex_lock(&atm_dev_mutex); |
c9933d08 MBJ |
447 | if (!list_empty(&atm_devs)) { |
448 | dev = list_entry(atm_devs.next, struct atm_dev, dev_list); | |
1da177e4 | 449 | atm_dev_hold(dev); |
1da177e4 | 450 | } |
57b47a53 | 451 | mutex_unlock(&atm_dev_mutex); |
c9933d08 MBJ |
452 | } |
453 | if (!dev) | |
454 | return -ENODEV; | |
455 | error = __vcc_connect(vcc, dev, vpi, vci); | |
456 | if (error) { | |
457 | atm_dev_put(dev); | |
458 | return error; | |
1da177e4 LT |
459 | } |
460 | if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) | |
461 | set_bit(ATM_VF_PARTIAL,&vcc->flags); | |
462 | if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags)) | |
463 | sock->state = SS_CONNECTED; | |
464 | return 0; | |
465 | } | |
466 | ||
467 | ||
468 | int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, | |
469 | size_t size, int flags) | |
470 | { | |
471 | struct sock *sk = sock->sk; | |
472 | struct atm_vcc *vcc; | |
473 | struct sk_buff *skb; | |
474 | int copied, error = -EINVAL; | |
475 | ||
476 | if (sock->state != SS_CONNECTED) | |
477 | return -ENOTCONN; | |
478 | if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ | |
479 | return -EOPNOTSUPP; | |
480 | vcc = ATM_SD(sock); | |
481 | if (test_bit(ATM_VF_RELEASED,&vcc->flags) || | |
482 | test_bit(ATM_VF_CLOSE,&vcc->flags) || | |
483 | !test_bit(ATM_VF_READY, &vcc->flags)) | |
484 | return 0; | |
485 | ||
486 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); | |
487 | if (!skb) | |
488 | return error; | |
489 | ||
f7d57453 | 490 | copied = skb->len; |
1da177e4 | 491 | if (copied > size) { |
f7d57453 | 492 | copied = size; |
1da177e4 LT |
493 | msg->msg_flags |= MSG_TRUNC; |
494 | } | |
495 | ||
f7d57453 YH |
496 | error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
497 | if (error) | |
498 | return error; | |
499 | sock_recv_timestamp(msg, sk, skb); | |
52240062 | 500 | pr_debug("RcvM %d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize); |
f7d57453 YH |
501 | atm_return(vcc, skb->truesize); |
502 | skb_free_datagram(sk, skb); | |
503 | return copied; | |
1da177e4 LT |
504 | } |
505 | ||
506 | ||
507 | int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, | |
508 | size_t total_len) | |
509 | { | |
510 | struct sock *sk = sock->sk; | |
511 | DEFINE_WAIT(wait); | |
512 | struct atm_vcc *vcc; | |
513 | struct sk_buff *skb; | |
514 | int eff,error; | |
515 | const void __user *buff; | |
516 | int size; | |
517 | ||
518 | lock_sock(sk); | |
519 | if (sock->state != SS_CONNECTED) { | |
520 | error = -ENOTCONN; | |
521 | goto out; | |
522 | } | |
523 | if (m->msg_name) { | |
524 | error = -EISCONN; | |
525 | goto out; | |
526 | } | |
527 | if (m->msg_iovlen != 1) { | |
528 | error = -ENOSYS; /* fix this later @@@ */ | |
529 | goto out; | |
530 | } | |
531 | buff = m->msg_iov->iov_base; | |
532 | size = m->msg_iov->iov_len; | |
533 | vcc = ATM_SD(sock); | |
534 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || | |
535 | test_bit(ATM_VF_CLOSE, &vcc->flags) || | |
536 | !test_bit(ATM_VF_READY, &vcc->flags)) { | |
537 | error = -EPIPE; | |
538 | send_sig(SIGPIPE, current, 0); | |
539 | goto out; | |
540 | } | |
541 | if (!size) { | |
542 | error = 0; | |
543 | goto out; | |
544 | } | |
545 | if (size < 0 || size > vcc->qos.txtp.max_sdu) { | |
546 | error = -EMSGSIZE; | |
547 | goto out; | |
548 | } | |
e49332bd | 549 | |
1da177e4 LT |
550 | eff = (size+3) & ~3; /* align to word boundary */ |
551 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
552 | error = 0; | |
553 | while (!(skb = alloc_tx(vcc,eff))) { | |
554 | if (m->msg_flags & MSG_DONTWAIT) { | |
555 | error = -EAGAIN; | |
556 | break; | |
557 | } | |
558 | schedule(); | |
559 | if (signal_pending(current)) { | |
560 | error = -ERESTARTSYS; | |
561 | break; | |
562 | } | |
563 | if (test_bit(ATM_VF_RELEASED,&vcc->flags) || | |
564 | test_bit(ATM_VF_CLOSE,&vcc->flags) || | |
565 | !test_bit(ATM_VF_READY,&vcc->flags)) { | |
566 | error = -EPIPE; | |
567 | send_sig(SIGPIPE, current, 0); | |
568 | break; | |
569 | } | |
570 | prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); | |
571 | } | |
572 | finish_wait(sk->sk_sleep, &wait); | |
573 | if (error) | |
574 | goto out; | |
575 | skb->dev = NULL; /* for paths shared with net_device interfaces */ | |
576 | ATM_SKB(skb)->atm_options = vcc->atm_options; | |
577 | if (copy_from_user(skb_put(skb,size),buff,size)) { | |
578 | kfree_skb(skb); | |
579 | error = -EFAULT; | |
580 | goto out; | |
581 | } | |
582 | if (eff != size) memset(skb->data+size,0,eff-size); | |
583 | error = vcc->dev->ops->send(vcc,skb); | |
584 | error = error ? error : size; | |
585 | out: | |
586 | release_sock(sk); | |
587 | return error; | |
588 | } | |
589 | ||
590 | ||
591 | unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) | |
592 | { | |
593 | struct sock *sk = sock->sk; | |
594 | struct atm_vcc *vcc; | |
595 | unsigned int mask; | |
596 | ||
a57de0b4 | 597 | sock_poll_wait(file, sk->sk_sleep, wait); |
1da177e4 LT |
598 | mask = 0; |
599 | ||
600 | vcc = ATM_SD(sock); | |
601 | ||
602 | /* exceptional events */ | |
603 | if (sk->sk_err) | |
604 | mask = POLLERR; | |
605 | ||
606 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || | |
607 | test_bit(ATM_VF_CLOSE, &vcc->flags)) | |
608 | mask |= POLLHUP; | |
609 | ||
610 | /* readable? */ | |
611 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
612 | mask |= POLLIN | POLLRDNORM; | |
613 | ||
614 | /* writable? */ | |
615 | if (sock->state == SS_CONNECTING && | |
616 | test_bit(ATM_VF_WAITING, &vcc->flags)) | |
617 | return mask; | |
618 | ||
619 | if (vcc->qos.txtp.traffic_class != ATM_NONE && | |
620 | vcc_writable(sk)) | |
621 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
622 | ||
623 | return mask; | |
624 | } | |
625 | ||
626 | ||
627 | static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) | |
628 | { | |
629 | int error; | |
630 | ||
631 | /* | |
632 | * Don't let the QoS change the already connected AAL type nor the | |
633 | * traffic class. | |
634 | */ | |
635 | if (qos->aal != vcc->qos.aal || | |
636 | qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || | |
637 | qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) | |
638 | return -EINVAL; | |
639 | error = adjust_tp(&qos->txtp,qos->aal); | |
640 | if (!error) error = adjust_tp(&qos->rxtp,qos->aal); | |
641 | if (error) return error; | |
642 | if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP; | |
643 | if (sk_atm(vcc)->sk_family == AF_ATMPVC) | |
644 | return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET); | |
645 | return svc_change_qos(vcc,qos); | |
646 | } | |
647 | ||
648 | ||
61c33e01 | 649 | static int check_tp(const struct atm_trafprm *tp) |
1da177e4 LT |
650 | { |
651 | /* @@@ Should be merged with adjust_tp */ | |
652 | if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0; | |
653 | if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && | |
654 | !tp->max_pcr) return -EINVAL; | |
655 | if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL; | |
656 | if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && | |
657 | tp->min_pcr > tp->max_pcr) return -EINVAL; | |
658 | /* | |
659 | * We allow pcr to be outside [min_pcr,max_pcr], because later | |
660 | * adjustment may still push it in the valid range. | |
661 | */ | |
662 | return 0; | |
663 | } | |
664 | ||
665 | ||
61c33e01 | 666 | static int check_qos(const struct atm_qos *qos) |
1da177e4 LT |
667 | { |
668 | int error; | |
669 | ||
670 | if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) | |
f7d57453 | 671 | return -EINVAL; |
1da177e4 LT |
672 | if (qos->txtp.traffic_class != qos->rxtp.traffic_class && |
673 | qos->txtp.traffic_class && qos->rxtp.traffic_class && | |
674 | qos->txtp.traffic_class != ATM_ANYCLASS && | |
675 | qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL; | |
676 | error = check_tp(&qos->txtp); | |
677 | if (error) return error; | |
678 | return check_tp(&qos->rxtp); | |
679 | } | |
680 | ||
681 | int vcc_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 682 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
683 | { |
684 | struct atm_vcc *vcc; | |
685 | unsigned long value; | |
686 | int error; | |
687 | ||
688 | if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) | |
689 | return -EINVAL; | |
690 | ||
691 | vcc = ATM_SD(sock); | |
692 | switch (optname) { | |
693 | case SO_ATMQOS: | |
694 | { | |
695 | struct atm_qos qos; | |
696 | ||
697 | if (copy_from_user(&qos,optval,sizeof(qos))) | |
698 | return -EFAULT; | |
699 | error = check_qos(&qos); | |
700 | if (error) return error; | |
701 | if (sock->state == SS_CONNECTED) | |
702 | return atm_change_qos(vcc,&qos); | |
703 | if (sock->state != SS_UNCONNECTED) | |
704 | return -EBADFD; | |
705 | vcc->qos = qos; | |
706 | set_bit(ATM_VF_HASQOS,&vcc->flags); | |
707 | return 0; | |
708 | } | |
709 | case SO_SETCLP: | |
710 | if (get_user(value,(unsigned long __user *)optval)) | |
711 | return -EFAULT; | |
712 | if (value) vcc->atm_options |= ATM_ATMOPT_CLP; | |
713 | else vcc->atm_options &= ~ATM_ATMOPT_CLP; | |
714 | return 0; | |
715 | default: | |
716 | if (level == SOL_SOCKET) return -EINVAL; | |
717 | break; | |
718 | } | |
719 | if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL; | |
720 | return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen); | |
721 | } | |
722 | ||
723 | ||
724 | int vcc_getsockopt(struct socket *sock, int level, int optname, | |
725 | char __user *optval, int __user *optlen) | |
726 | { | |
727 | struct atm_vcc *vcc; | |
728 | int len; | |
729 | ||
730 | if (get_user(len, optlen)) | |
731 | return -EFAULT; | |
732 | if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) | |
733 | return -EINVAL; | |
734 | ||
735 | vcc = ATM_SD(sock); | |
736 | switch (optname) { | |
737 | case SO_ATMQOS: | |
738 | if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) | |
739 | return -EINVAL; | |
740 | return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ? | |
741 | -EFAULT : 0; | |
742 | case SO_SETCLP: | |
743 | return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : | |
744 | 0,(unsigned long __user *)optval) ? -EFAULT : 0; | |
745 | case SO_ATMPVC: | |
746 | { | |
747 | struct sockaddr_atmpvc pvc; | |
748 | ||
749 | if (!vcc->dev || | |
750 | !test_bit(ATM_VF_ADDR,&vcc->flags)) | |
751 | return -ENOTCONN; | |
752 | pvc.sap_family = AF_ATMPVC; | |
753 | pvc.sap_addr.itf = vcc->dev->number; | |
754 | pvc.sap_addr.vpi = vcc->vpi; | |
755 | pvc.sap_addr.vci = vcc->vci; | |
756 | return copy_to_user(optval,&pvc,sizeof(pvc)) ? | |
757 | -EFAULT : 0; | |
758 | } | |
759 | default: | |
760 | if (level == SOL_SOCKET) return -EINVAL; | |
761 | break; | |
762 | } | |
763 | if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL; | |
764 | return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); | |
765 | } | |
766 | ||
767 | static int __init atm_init(void) | |
768 | { | |
769 | int error; | |
770 | ||
771 | if ((error = proto_register(&vcc_proto, 0)) < 0) | |
772 | goto out; | |
773 | ||
774 | if ((error = atmpvc_init()) < 0) { | |
775 | printk(KERN_ERR "atmpvc_init() failed with %d\n", error); | |
776 | goto out_unregister_vcc_proto; | |
777 | } | |
778 | if ((error = atmsvc_init()) < 0) { | |
779 | printk(KERN_ERR "atmsvc_init() failed with %d\n", error); | |
780 | goto out_atmpvc_exit; | |
781 | } | |
f7d57453 | 782 | if ((error = atm_proc_init()) < 0) { |
1da177e4 LT |
783 | printk(KERN_ERR "atm_proc_init() failed with %d\n",error); |
784 | goto out_atmsvc_exit; | |
785 | } | |
f7d57453 | 786 | if ((error = atm_sysfs_init()) < 0) { |
656d98b0 RK |
787 | printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error); |
788 | goto out_atmproc_exit; | |
789 | } | |
1da177e4 LT |
790 | out: |
791 | return error; | |
656d98b0 RK |
792 | out_atmproc_exit: |
793 | atm_proc_exit(); | |
1da177e4 LT |
794 | out_atmsvc_exit: |
795 | atmsvc_exit(); | |
796 | out_atmpvc_exit: | |
797 | atmsvc_exit(); | |
798 | out_unregister_vcc_proto: | |
799 | proto_unregister(&vcc_proto); | |
800 | goto out; | |
801 | } | |
802 | ||
803 | static void __exit atm_exit(void) | |
804 | { | |
805 | atm_proc_exit(); | |
656d98b0 | 806 | atm_sysfs_exit(); |
1da177e4 LT |
807 | atmsvc_exit(); |
808 | atmpvc_exit(); | |
809 | proto_unregister(&vcc_proto); | |
810 | } | |
811 | ||
84ff602e DW |
812 | subsys_initcall(atm_init); |
813 | ||
1da177e4 LT |
814 | module_exit(atm_exit); |
815 | ||
816 | MODULE_LICENSE("GPL"); | |
817 | MODULE_ALIAS_NETPROTO(PF_ATMPVC); | |
818 | MODULE_ALIAS_NETPROTO(PF_ATMSVC); |