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 | ||
99824461 | 5 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
1da177e4 | 6 | |
1da177e4 LT |
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> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
1da177e4 | 22 | #include <net/sock.h> /* struct sock */ |
a8147d73 JP |
23 | #include <linux/uaccess.h> |
24 | #include <linux/poll.h> | |
1da177e4 | 25 | |
1da177e4 | 26 | #include <asm/atomic.h> |
1da177e4 LT |
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 | ||
1da177e4 | 34 | struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; |
a8147d73 JP |
35 | EXPORT_SYMBOL(vcc_hash); |
36 | ||
1da177e4 | 37 | DEFINE_RWLOCK(vcc_sklist_lock); |
a8147d73 | 38 | EXPORT_SYMBOL(vcc_sklist_lock); |
1da177e4 | 39 | |
7313bb8f KH |
40 | static ATOMIC_NOTIFIER_HEAD(atm_dev_notify_chain); |
41 | ||
1da177e4 LT |
42 | static void __vcc_insert_socket(struct sock *sk) |
43 | { | |
44 | struct atm_vcc *vcc = atm_sk(sk); | |
a8147d73 | 45 | struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)]; |
81c3d547 | 46 | sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); |
1da177e4 LT |
47 | sk_add_node(sk, head); |
48 | } | |
49 | ||
50 | void vcc_insert_socket(struct sock *sk) | |
51 | { | |
52 | write_lock_irq(&vcc_sklist_lock); | |
53 | __vcc_insert_socket(sk); | |
54 | write_unlock_irq(&vcc_sklist_lock); | |
55 | } | |
a8147d73 | 56 | EXPORT_SYMBOL(vcc_insert_socket); |
1da177e4 LT |
57 | |
58 | static void vcc_remove_socket(struct sock *sk) | |
59 | { | |
60 | write_lock_irq(&vcc_sklist_lock); | |
61 | sk_del_node_init(sk); | |
62 | write_unlock_irq(&vcc_sklist_lock); | |
63 | } | |
64 | ||
a8147d73 | 65 | static struct sk_buff *alloc_tx(struct atm_vcc *vcc, unsigned int size) |
1da177e4 LT |
66 | { |
67 | struct sk_buff *skb; | |
68 | struct sock *sk = sk_atm(vcc); | |
69 | ||
81e2a3d5 | 70 | if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) { |
52240062 | 71 | pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", |
99824461 | 72 | sk_wmem_alloc_get(sk), size, sk->sk_sndbuf); |
1da177e4 LT |
73 | return NULL; |
74 | } | |
81e2a3d5 ED |
75 | while (!(skb = alloc_skb(size, GFP_KERNEL))) |
76 | schedule(); | |
a8147d73 | 77 | pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize); |
1da177e4 LT |
78 | atomic_add(skb->truesize, &sk->sk_wmem_alloc); |
79 | return skb; | |
80 | } | |
81 | ||
1da177e4 LT |
82 | static void vcc_sock_destruct(struct sock *sk) |
83 | { | |
84 | if (atomic_read(&sk->sk_rmem_alloc)) | |
a8147d73 JP |
85 | printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n", |
86 | __func__, atomic_read(&sk->sk_rmem_alloc)); | |
1da177e4 LT |
87 | |
88 | if (atomic_read(&sk->sk_wmem_alloc)) | |
a8147d73 JP |
89 | printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n", |
90 | __func__, atomic_read(&sk->sk_wmem_alloc)); | |
1da177e4 LT |
91 | } |
92 | ||
93 | static void vcc_def_wakeup(struct sock *sk) | |
94 | { | |
43815482 ED |
95 | struct socket_wq *wq; |
96 | ||
97 | rcu_read_lock(); | |
98 | wq = rcu_dereference(sk->sk_wq); | |
99 | if (wq_has_sleeper(wq)) | |
100 | wake_up(&wq->wait); | |
101 | rcu_read_unlock(); | |
1da177e4 LT |
102 | } |
103 | ||
104 | static inline int vcc_writable(struct sock *sk) | |
105 | { | |
106 | struct atm_vcc *vcc = atm_sk(sk); | |
107 | ||
108 | return (vcc->qos.txtp.max_sdu + | |
f7d57453 | 109 | atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; |
1da177e4 LT |
110 | } |
111 | ||
112 | static void vcc_write_space(struct sock *sk) | |
f7d57453 | 113 | { |
43815482 ED |
114 | struct socket_wq *wq; |
115 | ||
116 | rcu_read_lock(); | |
1da177e4 LT |
117 | |
118 | if (vcc_writable(sk)) { | |
43815482 ED |
119 | wq = rcu_dereference(sk->sk_wq); |
120 | if (wq_has_sleeper(wq)) | |
121 | wake_up_interruptible(&wq->wait); | |
1da177e4 | 122 | |
8d8ad9d7 | 123 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
1da177e4 LT |
124 | } |
125 | ||
43815482 | 126 | rcu_read_unlock(); |
1da177e4 LT |
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 | |
1b8d7ae4 | 135 | int vcc_create(struct net *net, struct socket *sock, int protocol, int family) |
1da177e4 LT |
136 | { |
137 | struct sock *sk; | |
138 | struct atm_vcc *vcc; | |
139 | ||
140 | sock->sk = NULL; | |
141 | if (sock->type == SOCK_STREAM) | |
142 | return -EINVAL; | |
6257ff21 | 143 | sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto); |
1da177e4 LT |
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; | |
a8147d73 JP |
152 | memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc)); |
153 | memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc)); | |
1da177e4 | 154 | vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ |
81e2a3d5 | 155 | atomic_set(&sk->sk_wmem_alloc, 1); |
1da177e4 LT |
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 | ||
1da177e4 LT |
166 | static void vcc_destroy_socket(struct sock *sk) |
167 | { | |
168 | struct atm_vcc *vcc = atm_sk(sk); | |
169 | struct sk_buff *skb; | |
170 | ||
171 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
172 | clear_bit(ATM_VF_READY, &vcc->flags); | |
173 | if (vcc->dev) { | |
174 | if (vcc->dev->ops->close) | |
175 | vcc->dev->ops->close(vcc); | |
176 | if (vcc->push) | |
177 | vcc->push(vcc, NULL); /* atmarpd has no push */ | |
178 | ||
1da177e4 | 179 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
a8147d73 | 180 | atm_return(vcc, skb->truesize); |
1da177e4 LT |
181 | kfree_skb(skb); |
182 | } | |
183 | ||
184 | module_put(vcc->dev->ops->owner); | |
185 | atm_dev_put(vcc->dev); | |
186 | } | |
9301e320 CW |
187 | |
188 | vcc_remove_socket(sk); | |
1da177e4 LT |
189 | } |
190 | ||
1da177e4 LT |
191 | int vcc_release(struct socket *sock) |
192 | { | |
193 | struct sock *sk = sock->sk; | |
194 | ||
195 | if (sk) { | |
196 | lock_sock(sk); | |
197 | vcc_destroy_socket(sock->sk); | |
198 | release_sock(sk); | |
199 | sock_put(sk); | |
200 | } | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
1da177e4 LT |
205 | void vcc_release_async(struct atm_vcc *vcc, int reply) |
206 | { | |
207 | struct sock *sk = sk_atm(vcc); | |
208 | ||
209 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
210 | sk->sk_shutdown |= RCV_SHUTDOWN; | |
211 | sk->sk_err = -reply; | |
212 | clear_bit(ATM_VF_WAITING, &vcc->flags); | |
213 | sk->sk_state_change(sk); | |
214 | } | |
1da177e4 LT |
215 | EXPORT_SYMBOL(vcc_release_async); |
216 | ||
7313bb8f KH |
217 | void atm_dev_signal_change(struct atm_dev *dev, char signal) |
218 | { | |
219 | pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n", | |
220 | __func__, signal, dev, dev->number, dev->signal); | |
221 | ||
222 | /* atm driver sending invalid signal */ | |
223 | WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND); | |
224 | ||
225 | if (dev->signal == signal) | |
226 | return; /* no change */ | |
227 | ||
228 | dev->signal = signal; | |
229 | ||
230 | atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev); | |
231 | } | |
232 | EXPORT_SYMBOL(atm_dev_signal_change); | |
1da177e4 | 233 | |
64bf69dd SG |
234 | void atm_dev_release_vccs(struct atm_dev *dev) |
235 | { | |
236 | int i; | |
237 | ||
238 | write_lock_irq(&vcc_sklist_lock); | |
239 | for (i = 0; i < VCC_HTABLE_SIZE; i++) { | |
240 | struct hlist_head *head = &vcc_hash[i]; | |
241 | struct hlist_node *node, *tmp; | |
242 | struct sock *s; | |
243 | struct atm_vcc *vcc; | |
244 | ||
245 | sk_for_each_safe(s, node, tmp, head) { | |
246 | vcc = atm_sk(s); | |
247 | if (vcc->dev == dev) { | |
248 | vcc_release_async(vcc, -EPIPE); | |
249 | sk_del_node_init(s); | |
250 | } | |
251 | } | |
252 | } | |
253 | write_unlock_irq(&vcc_sklist_lock); | |
254 | } | |
255 | ||
a8147d73 | 256 | static int adjust_tp(struct atm_trafprm *tp, unsigned char aal) |
1da177e4 LT |
257 | { |
258 | int max_sdu; | |
259 | ||
a8147d73 JP |
260 | if (!tp->traffic_class) |
261 | return 0; | |
1da177e4 | 262 | switch (aal) { |
a8147d73 JP |
263 | case ATM_AAL0: |
264 | max_sdu = ATM_CELL_SIZE-1; | |
265 | break; | |
266 | case ATM_AAL34: | |
267 | max_sdu = ATM_MAX_AAL34_PDU; | |
268 | break; | |
269 | default: | |
270 | pr_warning("AAL problems ... (%d)\n", aal); | |
271 | /* fall through */ | |
272 | case ATM_AAL5: | |
273 | max_sdu = ATM_MAX_AAL5_PDU; | |
1da177e4 | 274 | } |
a8147d73 JP |
275 | if (!tp->max_sdu) |
276 | tp->max_sdu = max_sdu; | |
277 | else if (tp->max_sdu > max_sdu) | |
278 | return -EINVAL; | |
279 | if (!tp->max_cdv) | |
280 | tp->max_cdv = ATM_MAX_CDV; | |
1da177e4 LT |
281 | return 0; |
282 | } | |
283 | ||
61c33e01 | 284 | static int check_ci(const struct atm_vcc *vcc, short vpi, int vci) |
1da177e4 | 285 | { |
a8147d73 | 286 | struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)]; |
1da177e4 LT |
287 | struct hlist_node *node; |
288 | struct sock *s; | |
289 | struct atm_vcc *walk; | |
290 | ||
291 | sk_for_each(s, node, head) { | |
292 | walk = atm_sk(s); | |
293 | if (walk->dev != vcc->dev) | |
294 | continue; | |
295 | if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && | |
296 | walk->vci == vci && ((walk->qos.txtp.traffic_class != | |
297 | ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || | |
298 | (walk->qos.rxtp.traffic_class != ATM_NONE && | |
299 | vcc->qos.rxtp.traffic_class != ATM_NONE))) | |
300 | return -EADDRINUSE; | |
301 | } | |
302 | ||
303 | /* allow VCCs with same VPI/VCI iff they don't collide on | |
304 | TX/RX (but we may refuse such sharing for other reasons, | |
305 | e.g. if protocol requires to have both channels) */ | |
306 | ||
307 | return 0; | |
308 | } | |
309 | ||
61c33e01 | 310 | static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci) |
1da177e4 LT |
311 | { |
312 | static short p; /* poor man's per-device cache */ | |
313 | static int c; | |
314 | short old_p; | |
315 | int old_c; | |
316 | int err; | |
317 | ||
318 | if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { | |
319 | err = check_ci(vcc, *vpi, *vci); | |
320 | return err; | |
321 | } | |
322 | /* last scan may have left values out of bounds for current device */ | |
323 | if (*vpi != ATM_VPI_ANY) | |
324 | p = *vpi; | |
325 | else if (p >= 1 << vcc->dev->ci_range.vpi_bits) | |
326 | p = 0; | |
327 | if (*vci != ATM_VCI_ANY) | |
328 | c = *vci; | |
329 | else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) | |
330 | c = ATM_NOT_RSV_VCI; | |
331 | old_p = p; | |
332 | old_c = c; | |
333 | do { | |
334 | if (!check_ci(vcc, p, c)) { | |
335 | *vpi = p; | |
336 | *vci = c; | |
337 | return 0; | |
338 | } | |
339 | if (*vci == ATM_VCI_ANY) { | |
340 | c++; | |
341 | if (c >= 1 << vcc->dev->ci_range.vci_bits) | |
342 | c = ATM_NOT_RSV_VCI; | |
343 | } | |
344 | if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && | |
345 | *vpi == ATM_VPI_ANY) { | |
346 | p++; | |
a8147d73 JP |
347 | if (p >= 1 << vcc->dev->ci_range.vpi_bits) |
348 | p = 0; | |
1da177e4 | 349 | } |
a8147d73 | 350 | } while (old_p != p || old_c != c); |
1da177e4 LT |
351 | return -EADDRINUSE; |
352 | } | |
353 | ||
1da177e4 LT |
354 | static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, |
355 | int vci) | |
356 | { | |
357 | struct sock *sk = sk_atm(vcc); | |
358 | int error; | |
359 | ||
360 | if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && | |
361 | vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && | |
362 | vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) | |
363 | return -EINVAL; | |
364 | if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) | |
365 | return -EPERM; | |
64bf69dd | 366 | error = -ENODEV; |
1da177e4 | 367 | if (!try_module_get(dev->ops->owner)) |
64bf69dd | 368 | return error; |
1da177e4 LT |
369 | vcc->dev = dev; |
370 | write_lock_irq(&vcc_sklist_lock); | |
f7d57453 | 371 | if (test_bit(ATM_DF_REMOVED, &dev->flags) || |
64bf69dd | 372 | (error = find_ci(vcc, &vpi, &vci))) { |
1da177e4 LT |
373 | write_unlock_irq(&vcc_sklist_lock); |
374 | goto fail_module_put; | |
375 | } | |
376 | vcc->vpi = vpi; | |
377 | vcc->vci = vci; | |
378 | __vcc_insert_socket(sk); | |
379 | write_unlock_irq(&vcc_sklist_lock); | |
380 | switch (vcc->qos.aal) { | |
a8147d73 JP |
381 | case ATM_AAL0: |
382 | error = atm_init_aal0(vcc); | |
383 | vcc->stats = &dev->stats.aal0; | |
384 | break; | |
385 | case ATM_AAL34: | |
386 | error = atm_init_aal34(vcc); | |
387 | vcc->stats = &dev->stats.aal34; | |
388 | break; | |
389 | case ATM_NO_AAL: | |
390 | /* ATM_AAL5 is also used in the "0 for default" case */ | |
391 | vcc->qos.aal = ATM_AAL5; | |
392 | /* fall through */ | |
393 | case ATM_AAL5: | |
394 | error = atm_init_aal5(vcc); | |
395 | vcc->stats = &dev->stats.aal5; | |
396 | break; | |
397 | default: | |
398 | error = -EPROTOTYPE; | |
1da177e4 | 399 | } |
a8147d73 JP |
400 | if (!error) |
401 | error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal); | |
402 | if (!error) | |
403 | error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal); | |
1da177e4 LT |
404 | if (error) |
405 | goto fail; | |
99824461 JP |
406 | pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal); |
407 | pr_debug(" TX: %d, PCR %d..%d, SDU %d\n", | |
408 | vcc->qos.txtp.traffic_class, | |
409 | vcc->qos.txtp.min_pcr, | |
410 | vcc->qos.txtp.max_pcr, | |
411 | vcc->qos.txtp.max_sdu); | |
412 | pr_debug(" RX: %d, PCR %d..%d, SDU %d\n", | |
413 | vcc->qos.rxtp.traffic_class, | |
414 | vcc->qos.rxtp.min_pcr, | |
415 | vcc->qos.rxtp.max_pcr, | |
416 | vcc->qos.rxtp.max_sdu); | |
1da177e4 LT |
417 | |
418 | if (dev->ops->open) { | |
a8147d73 JP |
419 | error = dev->ops->open(vcc); |
420 | if (error) | |
1da177e4 LT |
421 | goto fail; |
422 | } | |
423 | return 0; | |
424 | ||
425 | fail: | |
426 | vcc_remove_socket(sk); | |
427 | fail_module_put: | |
428 | module_put(dev->ops->owner); | |
429 | /* ensure we get dev module ref count correct */ | |
430 | vcc->dev = NULL; | |
431 | return error; | |
432 | } | |
433 | ||
1da177e4 LT |
434 | int vcc_connect(struct socket *sock, int itf, short vpi, int vci) |
435 | { | |
436 | struct atm_dev *dev; | |
437 | struct atm_vcc *vcc = ATM_SD(sock); | |
438 | int error; | |
439 | ||
99824461 | 440 | pr_debug("(vpi %d, vci %d)\n", vpi, vci); |
1da177e4 LT |
441 | if (sock->state == SS_CONNECTED) |
442 | return -EISCONN; | |
443 | if (sock->state != SS_UNCONNECTED) | |
444 | return -EINVAL; | |
445 | if (!(vpi || vci)) | |
446 | return -EINVAL; | |
447 | ||
448 | if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) | |
a8147d73 | 449 | clear_bit(ATM_VF_PARTIAL, &vcc->flags); |
1da177e4 | 450 | else |
a8147d73 | 451 | if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) |
1da177e4 | 452 | return -EINVAL; |
99824461 JP |
453 | pr_debug("(TX: cl %d,bw %d-%d,sdu %d; " |
454 | "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", | |
455 | vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr, | |
456 | vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu, | |
457 | vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr, | |
a8147d73 | 458 | vcc->qos.rxtp.max_pcr, vcc->qos.rxtp.max_sdu, |
99824461 JP |
459 | vcc->qos.aal == ATM_AAL5 ? "" : |
460 | vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ", | |
461 | vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); | |
1da177e4 LT |
462 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) |
463 | return -EBADFD; | |
464 | if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || | |
465 | vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) | |
466 | return -EINVAL; | |
c9933d08 | 467 | if (likely(itf != ATM_ITF_ANY)) { |
a8147d73 JP |
468 | dev = try_then_request_module(atm_dev_lookup(itf), |
469 | "atm-device-%d", itf); | |
1da177e4 | 470 | } else { |
1da177e4 | 471 | dev = NULL; |
57b47a53 | 472 | mutex_lock(&atm_dev_mutex); |
c9933d08 | 473 | if (!list_empty(&atm_devs)) { |
a8147d73 JP |
474 | dev = list_entry(atm_devs.next, |
475 | struct atm_dev, dev_list); | |
1da177e4 | 476 | atm_dev_hold(dev); |
1da177e4 | 477 | } |
57b47a53 | 478 | mutex_unlock(&atm_dev_mutex); |
c9933d08 MBJ |
479 | } |
480 | if (!dev) | |
481 | return -ENODEV; | |
482 | error = __vcc_connect(vcc, dev, vpi, vci); | |
483 | if (error) { | |
484 | atm_dev_put(dev); | |
485 | return error; | |
1da177e4 LT |
486 | } |
487 | if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) | |
a8147d73 JP |
488 | set_bit(ATM_VF_PARTIAL, &vcc->flags); |
489 | if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags)) | |
1da177e4 LT |
490 | sock->state = SS_CONNECTED; |
491 | return 0; | |
492 | } | |
493 | ||
1da177e4 LT |
494 | int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
495 | size_t size, int flags) | |
496 | { | |
497 | struct sock *sk = sock->sk; | |
498 | struct atm_vcc *vcc; | |
499 | struct sk_buff *skb; | |
500 | int copied, error = -EINVAL; | |
501 | ||
502 | if (sock->state != SS_CONNECTED) | |
503 | return -ENOTCONN; | |
504 | if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ | |
505 | return -EOPNOTSUPP; | |
506 | vcc = ATM_SD(sock); | |
a8147d73 JP |
507 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || |
508 | test_bit(ATM_VF_CLOSE, &vcc->flags) || | |
1da177e4 LT |
509 | !test_bit(ATM_VF_READY, &vcc->flags)) |
510 | return 0; | |
511 | ||
512 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); | |
513 | if (!skb) | |
514 | return error; | |
515 | ||
f7d57453 | 516 | copied = skb->len; |
1da177e4 | 517 | if (copied > size) { |
f7d57453 | 518 | copied = size; |
1da177e4 LT |
519 | msg->msg_flags |= MSG_TRUNC; |
520 | } | |
521 | ||
f7d57453 YH |
522 | error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
523 | if (error) | |
524 | return error; | |
3b885787 | 525 | sock_recv_ts_and_drops(msg, sk, skb); |
99824461 | 526 | pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize); |
f7d57453 YH |
527 | atm_return(vcc, skb->truesize); |
528 | skb_free_datagram(sk, skb); | |
529 | return copied; | |
1da177e4 LT |
530 | } |
531 | ||
1da177e4 LT |
532 | int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, |
533 | size_t total_len) | |
534 | { | |
535 | struct sock *sk = sock->sk; | |
536 | DEFINE_WAIT(wait); | |
537 | struct atm_vcc *vcc; | |
538 | struct sk_buff *skb; | |
a8147d73 | 539 | int eff, error; |
1da177e4 LT |
540 | const void __user *buff; |
541 | int size; | |
542 | ||
543 | lock_sock(sk); | |
544 | if (sock->state != SS_CONNECTED) { | |
545 | error = -ENOTCONN; | |
546 | goto out; | |
547 | } | |
548 | if (m->msg_name) { | |
549 | error = -EISCONN; | |
550 | goto out; | |
551 | } | |
552 | if (m->msg_iovlen != 1) { | |
553 | error = -ENOSYS; /* fix this later @@@ */ | |
554 | goto out; | |
555 | } | |
556 | buff = m->msg_iov->iov_base; | |
557 | size = m->msg_iov->iov_len; | |
558 | vcc = ATM_SD(sock); | |
559 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || | |
560 | test_bit(ATM_VF_CLOSE, &vcc->flags) || | |
561 | !test_bit(ATM_VF_READY, &vcc->flags)) { | |
562 | error = -EPIPE; | |
563 | send_sig(SIGPIPE, current, 0); | |
564 | goto out; | |
565 | } | |
566 | if (!size) { | |
567 | error = 0; | |
568 | goto out; | |
569 | } | |
570 | if (size < 0 || size > vcc->qos.txtp.max_sdu) { | |
571 | error = -EMSGSIZE; | |
572 | goto out; | |
573 | } | |
e49332bd | 574 | |
1da177e4 | 575 | eff = (size+3) & ~3; /* align to word boundary */ |
aa395145 | 576 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 577 | error = 0; |
a8147d73 | 578 | while (!(skb = alloc_tx(vcc, eff))) { |
1da177e4 LT |
579 | if (m->msg_flags & MSG_DONTWAIT) { |
580 | error = -EAGAIN; | |
581 | break; | |
582 | } | |
583 | schedule(); | |
584 | if (signal_pending(current)) { | |
585 | error = -ERESTARTSYS; | |
586 | break; | |
587 | } | |
a8147d73 JP |
588 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || |
589 | test_bit(ATM_VF_CLOSE, &vcc->flags) || | |
590 | !test_bit(ATM_VF_READY, &vcc->flags)) { | |
1da177e4 LT |
591 | error = -EPIPE; |
592 | send_sig(SIGPIPE, current, 0); | |
593 | break; | |
594 | } | |
aa395145 | 595 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
1da177e4 | 596 | } |
aa395145 | 597 | finish_wait(sk_sleep(sk), &wait); |
1da177e4 LT |
598 | if (error) |
599 | goto out; | |
600 | skb->dev = NULL; /* for paths shared with net_device interfaces */ | |
601 | ATM_SKB(skb)->atm_options = vcc->atm_options; | |
a8147d73 | 602 | if (copy_from_user(skb_put(skb, size), buff, size)) { |
1da177e4 LT |
603 | kfree_skb(skb); |
604 | error = -EFAULT; | |
605 | goto out; | |
606 | } | |
a8147d73 JP |
607 | if (eff != size) |
608 | memset(skb->data + size, 0, eff-size); | |
609 | error = vcc->dev->ops->send(vcc, skb); | |
1da177e4 LT |
610 | error = error ? error : size; |
611 | out: | |
612 | release_sock(sk); | |
613 | return error; | |
614 | } | |
615 | ||
1da177e4 LT |
616 | unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) |
617 | { | |
618 | struct sock *sk = sock->sk; | |
619 | struct atm_vcc *vcc; | |
620 | unsigned int mask; | |
621 | ||
aa395145 | 622 | sock_poll_wait(file, sk_sleep(sk), wait); |
1da177e4 LT |
623 | mask = 0; |
624 | ||
625 | vcc = ATM_SD(sock); | |
626 | ||
627 | /* exceptional events */ | |
628 | if (sk->sk_err) | |
629 | mask = POLLERR; | |
630 | ||
631 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || | |
632 | test_bit(ATM_VF_CLOSE, &vcc->flags)) | |
633 | mask |= POLLHUP; | |
634 | ||
635 | /* readable? */ | |
636 | if (!skb_queue_empty(&sk->sk_receive_queue)) | |
637 | mask |= POLLIN | POLLRDNORM; | |
638 | ||
639 | /* writable? */ | |
640 | if (sock->state == SS_CONNECTING && | |
641 | test_bit(ATM_VF_WAITING, &vcc->flags)) | |
642 | return mask; | |
643 | ||
644 | if (vcc->qos.txtp.traffic_class != ATM_NONE && | |
645 | vcc_writable(sk)) | |
646 | mask |= POLLOUT | POLLWRNORM | POLLWRBAND; | |
647 | ||
648 | return mask; | |
649 | } | |
650 | ||
a8147d73 | 651 | static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos) |
1da177e4 LT |
652 | { |
653 | int error; | |
654 | ||
655 | /* | |
656 | * Don't let the QoS change the already connected AAL type nor the | |
657 | * traffic class. | |
658 | */ | |
659 | if (qos->aal != vcc->qos.aal || | |
660 | qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || | |
661 | qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) | |
662 | return -EINVAL; | |
a8147d73 JP |
663 | error = adjust_tp(&qos->txtp, qos->aal); |
664 | if (!error) | |
665 | error = adjust_tp(&qos->rxtp, qos->aal); | |
666 | if (error) | |
667 | return error; | |
668 | if (!vcc->dev->ops->change_qos) | |
669 | return -EOPNOTSUPP; | |
1da177e4 | 670 | if (sk_atm(vcc)->sk_family == AF_ATMPVC) |
a8147d73 JP |
671 | return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET); |
672 | return svc_change_qos(vcc, qos); | |
1da177e4 LT |
673 | } |
674 | ||
61c33e01 | 675 | static int check_tp(const struct atm_trafprm *tp) |
1da177e4 LT |
676 | { |
677 | /* @@@ Should be merged with adjust_tp */ | |
a8147d73 JP |
678 | if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) |
679 | return 0; | |
1da177e4 | 680 | if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && |
a8147d73 JP |
681 | !tp->max_pcr) |
682 | return -EINVAL; | |
683 | if (tp->min_pcr == ATM_MAX_PCR) | |
684 | return -EINVAL; | |
1da177e4 | 685 | if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && |
a8147d73 JP |
686 | tp->min_pcr > tp->max_pcr) |
687 | return -EINVAL; | |
1da177e4 LT |
688 | /* |
689 | * We allow pcr to be outside [min_pcr,max_pcr], because later | |
690 | * adjustment may still push it in the valid range. | |
691 | */ | |
692 | return 0; | |
693 | } | |
694 | ||
61c33e01 | 695 | static int check_qos(const struct atm_qos *qos) |
1da177e4 LT |
696 | { |
697 | int error; | |
698 | ||
699 | if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) | |
f7d57453 | 700 | return -EINVAL; |
1da177e4 LT |
701 | if (qos->txtp.traffic_class != qos->rxtp.traffic_class && |
702 | qos->txtp.traffic_class && qos->rxtp.traffic_class && | |
703 | qos->txtp.traffic_class != ATM_ANYCLASS && | |
a8147d73 JP |
704 | qos->rxtp.traffic_class != ATM_ANYCLASS) |
705 | return -EINVAL; | |
1da177e4 | 706 | error = check_tp(&qos->txtp); |
a8147d73 JP |
707 | if (error) |
708 | return error; | |
1da177e4 LT |
709 | return check_tp(&qos->rxtp); |
710 | } | |
711 | ||
712 | int vcc_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 713 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
714 | { |
715 | struct atm_vcc *vcc; | |
716 | unsigned long value; | |
717 | int error; | |
718 | ||
719 | if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) | |
720 | return -EINVAL; | |
721 | ||
722 | vcc = ATM_SD(sock); | |
723 | switch (optname) { | |
a8147d73 JP |
724 | case SO_ATMQOS: |
725 | { | |
726 | struct atm_qos qos; | |
727 | ||
728 | if (copy_from_user(&qos, optval, sizeof(qos))) | |
729 | return -EFAULT; | |
730 | error = check_qos(&qos); | |
731 | if (error) | |
732 | return error; | |
733 | if (sock->state == SS_CONNECTED) | |
734 | return atm_change_qos(vcc, &qos); | |
735 | if (sock->state != SS_UNCONNECTED) | |
736 | return -EBADFD; | |
737 | vcc->qos = qos; | |
738 | set_bit(ATM_VF_HASQOS, &vcc->flags); | |
739 | return 0; | |
1da177e4 | 740 | } |
a8147d73 JP |
741 | case SO_SETCLP: |
742 | if (get_user(value, (unsigned long __user *)optval)) | |
743 | return -EFAULT; | |
744 | if (value) | |
745 | vcc->atm_options |= ATM_ATMOPT_CLP; | |
746 | else | |
747 | vcc->atm_options &= ~ATM_ATMOPT_CLP; | |
748 | return 0; | |
749 | default: | |
750 | if (level == SOL_SOCKET) | |
751 | return -EINVAL; | |
752 | break; | |
753 | } | |
754 | if (!vcc->dev || !vcc->dev->ops->setsockopt) | |
755 | return -EINVAL; | |
756 | return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen); | |
1da177e4 LT |
757 | } |
758 | ||
1da177e4 LT |
759 | int vcc_getsockopt(struct socket *sock, int level, int optname, |
760 | char __user *optval, int __user *optlen) | |
761 | { | |
762 | struct atm_vcc *vcc; | |
763 | int len; | |
764 | ||
765 | if (get_user(len, optlen)) | |
766 | return -EFAULT; | |
767 | if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) | |
768 | return -EINVAL; | |
769 | ||
770 | vcc = ATM_SD(sock); | |
771 | switch (optname) { | |
a8147d73 JP |
772 | case SO_ATMQOS: |
773 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) | |
774 | return -EINVAL; | |
775 | return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos)) | |
776 | ? -EFAULT : 0; | |
777 | case SO_SETCLP: | |
778 | return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0, | |
779 | (unsigned long __user *)optval) ? -EFAULT : 0; | |
780 | case SO_ATMPVC: | |
781 | { | |
782 | struct sockaddr_atmpvc pvc; | |
783 | ||
784 | if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags)) | |
785 | return -ENOTCONN; | |
786 | pvc.sap_family = AF_ATMPVC; | |
787 | pvc.sap_addr.itf = vcc->dev->number; | |
788 | pvc.sap_addr.vpi = vcc->vpi; | |
789 | pvc.sap_addr.vci = vcc->vci; | |
790 | return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0; | |
791 | } | |
792 | default: | |
793 | if (level == SOL_SOCKET) | |
794 | return -EINVAL; | |
1da177e4 LT |
795 | break; |
796 | } | |
a8147d73 JP |
797 | if (!vcc->dev || !vcc->dev->ops->getsockopt) |
798 | return -EINVAL; | |
1da177e4 LT |
799 | return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); |
800 | } | |
801 | ||
7313bb8f KH |
802 | int register_atmdevice_notifier(struct notifier_block *nb) |
803 | { | |
804 | return atomic_notifier_chain_register(&atm_dev_notify_chain, nb); | |
805 | } | |
806 | EXPORT_SYMBOL_GPL(register_atmdevice_notifier); | |
807 | ||
808 | void unregister_atmdevice_notifier(struct notifier_block *nb) | |
809 | { | |
810 | atomic_notifier_chain_unregister(&atm_dev_notify_chain, nb); | |
811 | } | |
812 | EXPORT_SYMBOL_GPL(unregister_atmdevice_notifier); | |
813 | ||
1da177e4 LT |
814 | static int __init atm_init(void) |
815 | { | |
816 | int error; | |
817 | ||
a8147d73 JP |
818 | error = proto_register(&vcc_proto, 0); |
819 | if (error < 0) | |
1da177e4 | 820 | goto out; |
a8147d73 JP |
821 | error = atmpvc_init(); |
822 | if (error < 0) { | |
99824461 | 823 | pr_err("atmpvc_init() failed with %d\n", error); |
1da177e4 LT |
824 | goto out_unregister_vcc_proto; |
825 | } | |
a8147d73 JP |
826 | error = atmsvc_init(); |
827 | if (error < 0) { | |
99824461 | 828 | pr_err("atmsvc_init() failed with %d\n", error); |
1da177e4 LT |
829 | goto out_atmpvc_exit; |
830 | } | |
a8147d73 JP |
831 | error = atm_proc_init(); |
832 | if (error < 0) { | |
99824461 | 833 | pr_err("atm_proc_init() failed with %d\n", error); |
1da177e4 LT |
834 | goto out_atmsvc_exit; |
835 | } | |
a8147d73 JP |
836 | error = atm_sysfs_init(); |
837 | if (error < 0) { | |
99824461 | 838 | pr_err("atm_sysfs_init() failed with %d\n", error); |
656d98b0 RK |
839 | goto out_atmproc_exit; |
840 | } | |
1da177e4 LT |
841 | out: |
842 | return error; | |
656d98b0 RK |
843 | out_atmproc_exit: |
844 | atm_proc_exit(); | |
1da177e4 LT |
845 | out_atmsvc_exit: |
846 | atmsvc_exit(); | |
847 | out_atmpvc_exit: | |
848 | atmsvc_exit(); | |
849 | out_unregister_vcc_proto: | |
850 | proto_unregister(&vcc_proto); | |
851 | goto out; | |
852 | } | |
853 | ||
854 | static void __exit atm_exit(void) | |
855 | { | |
856 | atm_proc_exit(); | |
656d98b0 | 857 | atm_sysfs_exit(); |
1da177e4 LT |
858 | atmsvc_exit(); |
859 | atmpvc_exit(); | |
860 | proto_unregister(&vcc_proto); | |
861 | } | |
862 | ||
84ff602e DW |
863 | subsys_initcall(atm_init); |
864 | ||
1da177e4 LT |
865 | module_exit(atm_exit); |
866 | ||
867 | MODULE_LICENSE("GPL"); | |
868 | MODULE_ALIAS_NETPROTO(PF_ATMPVC); | |
869 | MODULE_ALIAS_NETPROTO(PF_ATMSVC); |