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> | |
21 | #include <net/sock.h> /* struct sock */ | |
a8147d73 JP |
22 | #include <linux/uaccess.h> |
23 | #include <linux/poll.h> | |
1da177e4 | 24 | |
1da177e4 | 25 | #include <asm/atomic.h> |
1da177e4 LT |
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 | 33 | struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; |
a8147d73 JP |
34 | EXPORT_SYMBOL(vcc_hash); |
35 | ||
1da177e4 | 36 | DEFINE_RWLOCK(vcc_sklist_lock); |
a8147d73 | 37 | EXPORT_SYMBOL(vcc_sklist_lock); |
1da177e4 LT |
38 | |
39 | static void __vcc_insert_socket(struct sock *sk) | |
40 | { | |
41 | struct atm_vcc *vcc = atm_sk(sk); | |
a8147d73 | 42 | struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)]; |
81c3d547 | 43 | sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); |
1da177e4 LT |
44 | sk_add_node(sk, head); |
45 | } | |
46 | ||
47 | void vcc_insert_socket(struct sock *sk) | |
48 | { | |
49 | write_lock_irq(&vcc_sklist_lock); | |
50 | __vcc_insert_socket(sk); | |
51 | write_unlock_irq(&vcc_sklist_lock); | |
52 | } | |
a8147d73 | 53 | EXPORT_SYMBOL(vcc_insert_socket); |
1da177e4 LT |
54 | |
55 | static void vcc_remove_socket(struct sock *sk) | |
56 | { | |
57 | write_lock_irq(&vcc_sklist_lock); | |
58 | sk_del_node_init(sk); | |
59 | write_unlock_irq(&vcc_sklist_lock); | |
60 | } | |
61 | ||
a8147d73 | 62 | static struct sk_buff *alloc_tx(struct atm_vcc *vcc, unsigned int size) |
1da177e4 LT |
63 | { |
64 | struct sk_buff *skb; | |
65 | struct sock *sk = sk_atm(vcc); | |
66 | ||
81e2a3d5 | 67 | if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) { |
52240062 | 68 | pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", |
99824461 | 69 | sk_wmem_alloc_get(sk), size, sk->sk_sndbuf); |
1da177e4 LT |
70 | return NULL; |
71 | } | |
81e2a3d5 ED |
72 | while (!(skb = alloc_skb(size, GFP_KERNEL))) |
73 | schedule(); | |
a8147d73 | 74 | pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize); |
1da177e4 LT |
75 | atomic_add(skb->truesize, &sk->sk_wmem_alloc); |
76 | return skb; | |
77 | } | |
78 | ||
1da177e4 LT |
79 | static void vcc_sock_destruct(struct sock *sk) |
80 | { | |
81 | if (atomic_read(&sk->sk_rmem_alloc)) | |
a8147d73 JP |
82 | printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n", |
83 | __func__, atomic_read(&sk->sk_rmem_alloc)); | |
1da177e4 LT |
84 | |
85 | if (atomic_read(&sk->sk_wmem_alloc)) | |
a8147d73 JP |
86 | printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n", |
87 | __func__, atomic_read(&sk->sk_wmem_alloc)); | |
1da177e4 LT |
88 | } |
89 | ||
90 | static void vcc_def_wakeup(struct sock *sk) | |
91 | { | |
92 | read_lock(&sk->sk_callback_lock); | |
a57de0b4 | 93 | if (sk_has_sleeper(sk)) |
1da177e4 LT |
94 | wake_up(sk->sk_sleep); |
95 | read_unlock(&sk->sk_callback_lock); | |
96 | } | |
97 | ||
98 | static inline int vcc_writable(struct sock *sk) | |
99 | { | |
100 | struct atm_vcc *vcc = atm_sk(sk); | |
101 | ||
102 | return (vcc->qos.txtp.max_sdu + | |
f7d57453 | 103 | atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; |
1da177e4 LT |
104 | } |
105 | ||
106 | static void vcc_write_space(struct sock *sk) | |
f7d57453 | 107 | { |
1da177e4 LT |
108 | read_lock(&sk->sk_callback_lock); |
109 | ||
110 | if (vcc_writable(sk)) { | |
a57de0b4 | 111 | if (sk_has_sleeper(sk)) |
1da177e4 LT |
112 | wake_up_interruptible(sk->sk_sleep); |
113 | ||
8d8ad9d7 | 114 | sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); |
1da177e4 LT |
115 | } |
116 | ||
117 | read_unlock(&sk->sk_callback_lock); | |
118 | } | |
119 | ||
120 | static struct proto vcc_proto = { | |
121 | .name = "VCC", | |
122 | .owner = THIS_MODULE, | |
123 | .obj_size = sizeof(struct atm_vcc), | |
124 | }; | |
f7d57453 | 125 | |
1b8d7ae4 | 126 | int vcc_create(struct net *net, struct socket *sock, int protocol, int family) |
1da177e4 LT |
127 | { |
128 | struct sock *sk; | |
129 | struct atm_vcc *vcc; | |
130 | ||
131 | sock->sk = NULL; | |
132 | if (sock->type == SOCK_STREAM) | |
133 | return -EINVAL; | |
6257ff21 | 134 | sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto); |
1da177e4 LT |
135 | if (!sk) |
136 | return -ENOMEM; | |
137 | sock_init_data(sock, sk); | |
138 | sk->sk_state_change = vcc_def_wakeup; | |
139 | sk->sk_write_space = vcc_write_space; | |
140 | ||
141 | vcc = atm_sk(sk); | |
142 | vcc->dev = NULL; | |
a8147d73 JP |
143 | memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc)); |
144 | memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc)); | |
1da177e4 | 145 | vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ |
81e2a3d5 | 146 | atomic_set(&sk->sk_wmem_alloc, 1); |
1da177e4 LT |
147 | atomic_set(&sk->sk_rmem_alloc, 0); |
148 | vcc->push = NULL; | |
149 | vcc->pop = NULL; | |
150 | vcc->push_oam = NULL; | |
151 | vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ | |
152 | vcc->atm_options = vcc->aal_options = 0; | |
153 | sk->sk_destruct = vcc_sock_destruct; | |
154 | return 0; | |
155 | } | |
156 | ||
1da177e4 LT |
157 | static void vcc_destroy_socket(struct sock *sk) |
158 | { | |
159 | struct atm_vcc *vcc = atm_sk(sk); | |
160 | struct sk_buff *skb; | |
161 | ||
162 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
163 | clear_bit(ATM_VF_READY, &vcc->flags); | |
164 | if (vcc->dev) { | |
165 | if (vcc->dev->ops->close) | |
166 | vcc->dev->ops->close(vcc); | |
167 | if (vcc->push) | |
168 | vcc->push(vcc, NULL); /* atmarpd has no push */ | |
169 | ||
1da177e4 | 170 | while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { |
a8147d73 | 171 | atm_return(vcc, skb->truesize); |
1da177e4 LT |
172 | kfree_skb(skb); |
173 | } | |
174 | ||
175 | module_put(vcc->dev->ops->owner); | |
176 | atm_dev_put(vcc->dev); | |
177 | } | |
9301e320 CW |
178 | |
179 | vcc_remove_socket(sk); | |
1da177e4 LT |
180 | } |
181 | ||
1da177e4 LT |
182 | int vcc_release(struct socket *sock) |
183 | { | |
184 | struct sock *sk = sock->sk; | |
185 | ||
186 | if (sk) { | |
187 | lock_sock(sk); | |
188 | vcc_destroy_socket(sock->sk); | |
189 | release_sock(sk); | |
190 | sock_put(sk); | |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
1da177e4 LT |
196 | void vcc_release_async(struct atm_vcc *vcc, int reply) |
197 | { | |
198 | struct sock *sk = sk_atm(vcc); | |
199 | ||
200 | set_bit(ATM_VF_CLOSE, &vcc->flags); | |
201 | sk->sk_shutdown |= RCV_SHUTDOWN; | |
202 | sk->sk_err = -reply; | |
203 | clear_bit(ATM_VF_WAITING, &vcc->flags); | |
204 | sk->sk_state_change(sk); | |
205 | } | |
1da177e4 LT |
206 | EXPORT_SYMBOL(vcc_release_async); |
207 | ||
208 | ||
64bf69dd SG |
209 | void atm_dev_release_vccs(struct atm_dev *dev) |
210 | { | |
211 | int i; | |
212 | ||
213 | write_lock_irq(&vcc_sklist_lock); | |
214 | for (i = 0; i < VCC_HTABLE_SIZE; i++) { | |
215 | struct hlist_head *head = &vcc_hash[i]; | |
216 | struct hlist_node *node, *tmp; | |
217 | struct sock *s; | |
218 | struct atm_vcc *vcc; | |
219 | ||
220 | sk_for_each_safe(s, node, tmp, head) { | |
221 | vcc = atm_sk(s); | |
222 | if (vcc->dev == dev) { | |
223 | vcc_release_async(vcc, -EPIPE); | |
224 | sk_del_node_init(s); | |
225 | } | |
226 | } | |
227 | } | |
228 | write_unlock_irq(&vcc_sklist_lock); | |
229 | } | |
230 | ||
a8147d73 | 231 | static int adjust_tp(struct atm_trafprm *tp, unsigned char aal) |
1da177e4 LT |
232 | { |
233 | int max_sdu; | |
234 | ||
a8147d73 JP |
235 | if (!tp->traffic_class) |
236 | return 0; | |
1da177e4 | 237 | switch (aal) { |
a8147d73 JP |
238 | case ATM_AAL0: |
239 | max_sdu = ATM_CELL_SIZE-1; | |
240 | break; | |
241 | case ATM_AAL34: | |
242 | max_sdu = ATM_MAX_AAL34_PDU; | |
243 | break; | |
244 | default: | |
245 | pr_warning("AAL problems ... (%d)\n", aal); | |
246 | /* fall through */ | |
247 | case ATM_AAL5: | |
248 | max_sdu = ATM_MAX_AAL5_PDU; | |
1da177e4 | 249 | } |
a8147d73 JP |
250 | if (!tp->max_sdu) |
251 | tp->max_sdu = max_sdu; | |
252 | else if (tp->max_sdu > max_sdu) | |
253 | return -EINVAL; | |
254 | if (!tp->max_cdv) | |
255 | tp->max_cdv = ATM_MAX_CDV; | |
1da177e4 LT |
256 | return 0; |
257 | } | |
258 | ||
61c33e01 | 259 | static int check_ci(const struct atm_vcc *vcc, short vpi, int vci) |
1da177e4 | 260 | { |
a8147d73 | 261 | struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)]; |
1da177e4 LT |
262 | struct hlist_node *node; |
263 | struct sock *s; | |
264 | struct atm_vcc *walk; | |
265 | ||
266 | sk_for_each(s, node, head) { | |
267 | walk = atm_sk(s); | |
268 | if (walk->dev != vcc->dev) | |
269 | continue; | |
270 | if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && | |
271 | walk->vci == vci && ((walk->qos.txtp.traffic_class != | |
272 | ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || | |
273 | (walk->qos.rxtp.traffic_class != ATM_NONE && | |
274 | vcc->qos.rxtp.traffic_class != ATM_NONE))) | |
275 | return -EADDRINUSE; | |
276 | } | |
277 | ||
278 | /* allow VCCs with same VPI/VCI iff they don't collide on | |
279 | TX/RX (but we may refuse such sharing for other reasons, | |
280 | e.g. if protocol requires to have both channels) */ | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
61c33e01 | 285 | static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci) |
1da177e4 LT |
286 | { |
287 | static short p; /* poor man's per-device cache */ | |
288 | static int c; | |
289 | short old_p; | |
290 | int old_c; | |
291 | int err; | |
292 | ||
293 | if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { | |
294 | err = check_ci(vcc, *vpi, *vci); | |
295 | return err; | |
296 | } | |
297 | /* last scan may have left values out of bounds for current device */ | |
298 | if (*vpi != ATM_VPI_ANY) | |
299 | p = *vpi; | |
300 | else if (p >= 1 << vcc->dev->ci_range.vpi_bits) | |
301 | p = 0; | |
302 | if (*vci != ATM_VCI_ANY) | |
303 | c = *vci; | |
304 | else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) | |
305 | c = ATM_NOT_RSV_VCI; | |
306 | old_p = p; | |
307 | old_c = c; | |
308 | do { | |
309 | if (!check_ci(vcc, p, c)) { | |
310 | *vpi = p; | |
311 | *vci = c; | |
312 | return 0; | |
313 | } | |
314 | if (*vci == ATM_VCI_ANY) { | |
315 | c++; | |
316 | if (c >= 1 << vcc->dev->ci_range.vci_bits) | |
317 | c = ATM_NOT_RSV_VCI; | |
318 | } | |
319 | if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && | |
320 | *vpi == ATM_VPI_ANY) { | |
321 | p++; | |
a8147d73 JP |
322 | if (p >= 1 << vcc->dev->ci_range.vpi_bits) |
323 | p = 0; | |
1da177e4 | 324 | } |
a8147d73 | 325 | } while (old_p != p || old_c != c); |
1da177e4 LT |
326 | return -EADDRINUSE; |
327 | } | |
328 | ||
1da177e4 LT |
329 | static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, |
330 | int vci) | |
331 | { | |
332 | struct sock *sk = sk_atm(vcc); | |
333 | int error; | |
334 | ||
335 | if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && | |
336 | vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && | |
337 | vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) | |
338 | return -EINVAL; | |
339 | if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) | |
340 | return -EPERM; | |
64bf69dd | 341 | error = -ENODEV; |
1da177e4 | 342 | if (!try_module_get(dev->ops->owner)) |
64bf69dd | 343 | return error; |
1da177e4 LT |
344 | vcc->dev = dev; |
345 | write_lock_irq(&vcc_sklist_lock); | |
f7d57453 | 346 | if (test_bit(ATM_DF_REMOVED, &dev->flags) || |
64bf69dd | 347 | (error = find_ci(vcc, &vpi, &vci))) { |
1da177e4 LT |
348 | write_unlock_irq(&vcc_sklist_lock); |
349 | goto fail_module_put; | |
350 | } | |
351 | vcc->vpi = vpi; | |
352 | vcc->vci = vci; | |
353 | __vcc_insert_socket(sk); | |
354 | write_unlock_irq(&vcc_sklist_lock); | |
355 | switch (vcc->qos.aal) { | |
a8147d73 JP |
356 | case ATM_AAL0: |
357 | error = atm_init_aal0(vcc); | |
358 | vcc->stats = &dev->stats.aal0; | |
359 | break; | |
360 | case ATM_AAL34: | |
361 | error = atm_init_aal34(vcc); | |
362 | vcc->stats = &dev->stats.aal34; | |
363 | break; | |
364 | case ATM_NO_AAL: | |
365 | /* ATM_AAL5 is also used in the "0 for default" case */ | |
366 | vcc->qos.aal = ATM_AAL5; | |
367 | /* fall through */ | |
368 | case ATM_AAL5: | |
369 | error = atm_init_aal5(vcc); | |
370 | vcc->stats = &dev->stats.aal5; | |
371 | break; | |
372 | default: | |
373 | error = -EPROTOTYPE; | |
1da177e4 | 374 | } |
a8147d73 JP |
375 | if (!error) |
376 | error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal); | |
377 | if (!error) | |
378 | error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal); | |
1da177e4 LT |
379 | if (error) |
380 | goto fail; | |
99824461 JP |
381 | pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal); |
382 | pr_debug(" TX: %d, PCR %d..%d, SDU %d\n", | |
383 | vcc->qos.txtp.traffic_class, | |
384 | vcc->qos.txtp.min_pcr, | |
385 | vcc->qos.txtp.max_pcr, | |
386 | vcc->qos.txtp.max_sdu); | |
387 | pr_debug(" RX: %d, PCR %d..%d, SDU %d\n", | |
388 | vcc->qos.rxtp.traffic_class, | |
389 | vcc->qos.rxtp.min_pcr, | |
390 | vcc->qos.rxtp.max_pcr, | |
391 | vcc->qos.rxtp.max_sdu); | |
1da177e4 LT |
392 | |
393 | if (dev->ops->open) { | |
a8147d73 JP |
394 | error = dev->ops->open(vcc); |
395 | if (error) | |
1da177e4 LT |
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 | ||
1da177e4 LT |
409 | int vcc_connect(struct socket *sock, int itf, short vpi, int vci) |
410 | { | |
411 | struct atm_dev *dev; | |
412 | struct atm_vcc *vcc = ATM_SD(sock); | |
413 | int error; | |
414 | ||
99824461 | 415 | pr_debug("(vpi %d, vci %d)\n", vpi, vci); |
1da177e4 LT |
416 | if (sock->state == SS_CONNECTED) |
417 | return -EISCONN; | |
418 | if (sock->state != SS_UNCONNECTED) | |
419 | return -EINVAL; | |
420 | if (!(vpi || vci)) | |
421 | return -EINVAL; | |
422 | ||
423 | if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) | |
a8147d73 | 424 | clear_bit(ATM_VF_PARTIAL, &vcc->flags); |
1da177e4 | 425 | else |
a8147d73 | 426 | if (test_bit(ATM_VF_PARTIAL, &vcc->flags)) |
1da177e4 | 427 | return -EINVAL; |
99824461 JP |
428 | pr_debug("(TX: cl %d,bw %d-%d,sdu %d; " |
429 | "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", | |
430 | vcc->qos.txtp.traffic_class, vcc->qos.txtp.min_pcr, | |
431 | vcc->qos.txtp.max_pcr, vcc->qos.txtp.max_sdu, | |
432 | vcc->qos.rxtp.traffic_class, vcc->qos.rxtp.min_pcr, | |
a8147d73 | 433 | vcc->qos.rxtp.max_pcr, vcc->qos.rxtp.max_sdu, |
99824461 JP |
434 | vcc->qos.aal == ATM_AAL5 ? "" : |
435 | vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ", | |
436 | vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); | |
1da177e4 LT |
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)) { |
a8147d73 JP |
443 | dev = try_then_request_module(atm_dev_lookup(itf), |
444 | "atm-device-%d", itf); | |
1da177e4 | 445 | } else { |
1da177e4 | 446 | dev = NULL; |
57b47a53 | 447 | mutex_lock(&atm_dev_mutex); |
c9933d08 | 448 | if (!list_empty(&atm_devs)) { |
a8147d73 JP |
449 | dev = list_entry(atm_devs.next, |
450 | struct atm_dev, dev_list); | |
1da177e4 | 451 | atm_dev_hold(dev); |
1da177e4 | 452 | } |
57b47a53 | 453 | mutex_unlock(&atm_dev_mutex); |
c9933d08 MBJ |
454 | } |
455 | if (!dev) | |
456 | return -ENODEV; | |
457 | error = __vcc_connect(vcc, dev, vpi, vci); | |
458 | if (error) { | |
459 | atm_dev_put(dev); | |
460 | return error; | |
1da177e4 LT |
461 | } |
462 | if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) | |
a8147d73 JP |
463 | set_bit(ATM_VF_PARTIAL, &vcc->flags); |
464 | if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags)) | |
1da177e4 LT |
465 | sock->state = SS_CONNECTED; |
466 | return 0; | |
467 | } | |
468 | ||
1da177e4 LT |
469 | int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
470 | size_t size, int flags) | |
471 | { | |
472 | struct sock *sk = sock->sk; | |
473 | struct atm_vcc *vcc; | |
474 | struct sk_buff *skb; | |
475 | int copied, error = -EINVAL; | |
476 | ||
477 | if (sock->state != SS_CONNECTED) | |
478 | return -ENOTCONN; | |
479 | if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ | |
480 | return -EOPNOTSUPP; | |
481 | vcc = ATM_SD(sock); | |
a8147d73 JP |
482 | if (test_bit(ATM_VF_RELEASED, &vcc->flags) || |
483 | test_bit(ATM_VF_CLOSE, &vcc->flags) || | |
1da177e4 LT |
484 | !test_bit(ATM_VF_READY, &vcc->flags)) |
485 | return 0; | |
486 | ||
487 | skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); | |
488 | if (!skb) | |
489 | return error; | |
490 | ||
f7d57453 | 491 | copied = skb->len; |
1da177e4 | 492 | if (copied > size) { |
f7d57453 | 493 | copied = size; |
1da177e4 LT |
494 | msg->msg_flags |= MSG_TRUNC; |
495 | } | |
496 | ||
f7d57453 YH |
497 | error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
498 | if (error) | |
499 | return error; | |
3b885787 | 500 | sock_recv_ts_and_drops(msg, sk, skb); |
99824461 | 501 | pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize); |
f7d57453 YH |
502 | atm_return(vcc, skb->truesize); |
503 | skb_free_datagram(sk, skb); | |
504 | return copied; | |
1da177e4 LT |
505 | } |
506 | ||
1da177e4 LT |
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; | |
a8147d73 | 514 | int eff, error; |
1da177e4 LT |
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; | |
a8147d73 | 553 | while (!(skb = alloc_tx(vcc, eff))) { |
1da177e4 LT |
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 | } | |
a8147d73 JP |
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)) { | |
1da177e4 LT |
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; | |
a8147d73 | 577 | if (copy_from_user(skb_put(skb, size), buff, size)) { |
1da177e4 LT |
578 | kfree_skb(skb); |
579 | error = -EFAULT; | |
580 | goto out; | |
581 | } | |
a8147d73 JP |
582 | if (eff != size) |
583 | memset(skb->data + size, 0, eff-size); | |
584 | error = vcc->dev->ops->send(vcc, skb); | |
1da177e4 LT |
585 | error = error ? error : size; |
586 | out: | |
587 | release_sock(sk); | |
588 | return error; | |
589 | } | |
590 | ||
1da177e4 LT |
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 | ||
a8147d73 | 626 | static int atm_change_qos(struct atm_vcc *vcc, struct atm_qos *qos) |
1da177e4 LT |
627 | { |
628 | int error; | |
629 | ||
630 | /* | |
631 | * Don't let the QoS change the already connected AAL type nor the | |
632 | * traffic class. | |
633 | */ | |
634 | if (qos->aal != vcc->qos.aal || | |
635 | qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || | |
636 | qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) | |
637 | return -EINVAL; | |
a8147d73 JP |
638 | error = adjust_tp(&qos->txtp, qos->aal); |
639 | if (!error) | |
640 | error = adjust_tp(&qos->rxtp, qos->aal); | |
641 | if (error) | |
642 | return error; | |
643 | if (!vcc->dev->ops->change_qos) | |
644 | return -EOPNOTSUPP; | |
1da177e4 | 645 | if (sk_atm(vcc)->sk_family == AF_ATMPVC) |
a8147d73 JP |
646 | return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET); |
647 | return svc_change_qos(vcc, qos); | |
1da177e4 LT |
648 | } |
649 | ||
61c33e01 | 650 | static int check_tp(const struct atm_trafprm *tp) |
1da177e4 LT |
651 | { |
652 | /* @@@ Should be merged with adjust_tp */ | |
a8147d73 JP |
653 | if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) |
654 | return 0; | |
1da177e4 | 655 | if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && |
a8147d73 JP |
656 | !tp->max_pcr) |
657 | return -EINVAL; | |
658 | if (tp->min_pcr == ATM_MAX_PCR) | |
659 | return -EINVAL; | |
1da177e4 | 660 | if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && |
a8147d73 JP |
661 | tp->min_pcr > tp->max_pcr) |
662 | return -EINVAL; | |
1da177e4 LT |
663 | /* |
664 | * We allow pcr to be outside [min_pcr,max_pcr], because later | |
665 | * adjustment may still push it in the valid range. | |
666 | */ | |
667 | return 0; | |
668 | } | |
669 | ||
61c33e01 | 670 | static int check_qos(const struct atm_qos *qos) |
1da177e4 LT |
671 | { |
672 | int error; | |
673 | ||
674 | if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) | |
f7d57453 | 675 | return -EINVAL; |
1da177e4 LT |
676 | if (qos->txtp.traffic_class != qos->rxtp.traffic_class && |
677 | qos->txtp.traffic_class && qos->rxtp.traffic_class && | |
678 | qos->txtp.traffic_class != ATM_ANYCLASS && | |
a8147d73 JP |
679 | qos->rxtp.traffic_class != ATM_ANYCLASS) |
680 | return -EINVAL; | |
1da177e4 | 681 | error = check_tp(&qos->txtp); |
a8147d73 JP |
682 | if (error) |
683 | return error; | |
1da177e4 LT |
684 | return check_tp(&qos->rxtp); |
685 | } | |
686 | ||
687 | int vcc_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 688 | char __user *optval, unsigned int optlen) |
1da177e4 LT |
689 | { |
690 | struct atm_vcc *vcc; | |
691 | unsigned long value; | |
692 | int error; | |
693 | ||
694 | if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) | |
695 | return -EINVAL; | |
696 | ||
697 | vcc = ATM_SD(sock); | |
698 | switch (optname) { | |
a8147d73 JP |
699 | case SO_ATMQOS: |
700 | { | |
701 | struct atm_qos qos; | |
702 | ||
703 | if (copy_from_user(&qos, optval, sizeof(qos))) | |
704 | return -EFAULT; | |
705 | error = check_qos(&qos); | |
706 | if (error) | |
707 | 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; | |
1da177e4 | 715 | } |
a8147d73 JP |
716 | case SO_SETCLP: |
717 | if (get_user(value, (unsigned long __user *)optval)) | |
718 | return -EFAULT; | |
719 | if (value) | |
720 | vcc->atm_options |= ATM_ATMOPT_CLP; | |
721 | else | |
722 | vcc->atm_options &= ~ATM_ATMOPT_CLP; | |
723 | return 0; | |
724 | default: | |
725 | if (level == SOL_SOCKET) | |
726 | return -EINVAL; | |
727 | break; | |
728 | } | |
729 | if (!vcc->dev || !vcc->dev->ops->setsockopt) | |
730 | return -EINVAL; | |
731 | return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen); | |
1da177e4 LT |
732 | } |
733 | ||
1da177e4 LT |
734 | int vcc_getsockopt(struct socket *sock, int level, int optname, |
735 | char __user *optval, int __user *optlen) | |
736 | { | |
737 | struct atm_vcc *vcc; | |
738 | int len; | |
739 | ||
740 | if (get_user(len, optlen)) | |
741 | return -EFAULT; | |
742 | if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) | |
743 | return -EINVAL; | |
744 | ||
745 | vcc = ATM_SD(sock); | |
746 | switch (optname) { | |
a8147d73 JP |
747 | case SO_ATMQOS: |
748 | if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) | |
749 | return -EINVAL; | |
750 | return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos)) | |
751 | ? -EFAULT : 0; | |
752 | case SO_SETCLP: | |
753 | return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0, | |
754 | (unsigned long __user *)optval) ? -EFAULT : 0; | |
755 | case SO_ATMPVC: | |
756 | { | |
757 | struct sockaddr_atmpvc pvc; | |
758 | ||
759 | if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags)) | |
760 | return -ENOTCONN; | |
761 | pvc.sap_family = AF_ATMPVC; | |
762 | pvc.sap_addr.itf = vcc->dev->number; | |
763 | pvc.sap_addr.vpi = vcc->vpi; | |
764 | pvc.sap_addr.vci = vcc->vci; | |
765 | return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0; | |
766 | } | |
767 | default: | |
768 | if (level == SOL_SOCKET) | |
769 | return -EINVAL; | |
1da177e4 LT |
770 | break; |
771 | } | |
a8147d73 JP |
772 | if (!vcc->dev || !vcc->dev->ops->getsockopt) |
773 | return -EINVAL; | |
1da177e4 LT |
774 | return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); |
775 | } | |
776 | ||
777 | static int __init atm_init(void) | |
778 | { | |
779 | int error; | |
780 | ||
a8147d73 JP |
781 | error = proto_register(&vcc_proto, 0); |
782 | if (error < 0) | |
1da177e4 | 783 | goto out; |
a8147d73 JP |
784 | error = atmpvc_init(); |
785 | if (error < 0) { | |
99824461 | 786 | pr_err("atmpvc_init() failed with %d\n", error); |
1da177e4 LT |
787 | goto out_unregister_vcc_proto; |
788 | } | |
a8147d73 JP |
789 | error = atmsvc_init(); |
790 | if (error < 0) { | |
99824461 | 791 | pr_err("atmsvc_init() failed with %d\n", error); |
1da177e4 LT |
792 | goto out_atmpvc_exit; |
793 | } | |
a8147d73 JP |
794 | error = atm_proc_init(); |
795 | if (error < 0) { | |
99824461 | 796 | pr_err("atm_proc_init() failed with %d\n", error); |
1da177e4 LT |
797 | goto out_atmsvc_exit; |
798 | } | |
a8147d73 JP |
799 | error = atm_sysfs_init(); |
800 | if (error < 0) { | |
99824461 | 801 | pr_err("atm_sysfs_init() failed with %d\n", error); |
656d98b0 RK |
802 | goto out_atmproc_exit; |
803 | } | |
1da177e4 LT |
804 | out: |
805 | return error; | |
656d98b0 RK |
806 | out_atmproc_exit: |
807 | atm_proc_exit(); | |
1da177e4 LT |
808 | out_atmsvc_exit: |
809 | atmsvc_exit(); | |
810 | out_atmpvc_exit: | |
811 | atmsvc_exit(); | |
812 | out_unregister_vcc_proto: | |
813 | proto_unregister(&vcc_proto); | |
814 | goto out; | |
815 | } | |
816 | ||
817 | static void __exit atm_exit(void) | |
818 | { | |
819 | atm_proc_exit(); | |
656d98b0 | 820 | atm_sysfs_exit(); |
1da177e4 LT |
821 | atmsvc_exit(); |
822 | atmpvc_exit(); | |
823 | proto_unregister(&vcc_proto); | |
824 | } | |
825 | ||
84ff602e DW |
826 | subsys_initcall(atm_init); |
827 | ||
1da177e4 LT |
828 | module_exit(atm_exit); |
829 | ||
830 | MODULE_LICENSE("GPL"); | |
831 | MODULE_ALIAS_NETPROTO(PF_ATMPVC); | |
832 | MODULE_ALIAS_NETPROTO(PF_ATMSVC); |