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/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> 14 #include <linux/mm.h> 15 #include <linux/sched.h> 16 #include <linux/time.h> /* struct timeval */ 17 #include <linux/skbuff.h> 18 #include <linux/bitops.h> 19 #include <linux/init.h> 20 #include <net/sock.h> /* struct sock */ 21 22 #include <asm/uaccess.h> 23 #include <asm/atomic.h> 24 #include <asm/poll.h> 25 26 27 #include "resources.h" /* atm_find_dev */ 28 #include "common.h" /* prototypes */ 29 #include "protocols.h" /* atm_init_<transport> */ 30 #include "addr.h" /* address registry */ 31 #include "signaling.h" /* for WAITING and sigd_attach */ 32 33 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)]; 41 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); 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 65 if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) { 66 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", 67 sk_wmem_alloc_get(sk), size, 68 sk->sk_sndbuf); 69 return NULL; 70 } 71 while (!(skb = alloc_skb(size, GFP_KERNEL))) 72 schedule(); 73 pr_debug("AlTx %d += %d\n", sk_wmem_alloc_get(sk), skb->truesize); 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); 95 if (sk_has_sleeper(sk)) 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 + 105 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; 106 } 107 108 static void vcc_write_space(struct sock *sk) 109 { 110 read_lock(&sk->sk_callback_lock); 111 112 if (vcc_writable(sk)) { 113 if (sk_has_sleeper(sk)) 114 wake_up_interruptible(sk->sk_sleep); 115 116 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); 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 }; 127 128 int vcc_create(struct net *net, struct socket *sock, int protocol, int family) 129 { 130 struct sock *sk; 131 struct atm_vcc *vcc; 132 133 sock->sk = NULL; 134 if (sock->type == SOCK_STREAM) 135 return -EINVAL; 136 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto); 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 */ 148 atomic_set(&sk->sk_wmem_alloc, 1); 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 */ 172 173 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 } 181 182 vcc_remove_socket(sk); 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); 214 215 216 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 } 237 238 239 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 } 263 264 265 static int check_ci(const struct atm_vcc *vcc, short vpi, int vci) 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 } 291 292 293 static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci) 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; 350 error = -ENODEV; 351 if (!try_module_get(dev->ops->owner)) 352 return error; 353 vcc->dev = dev; 354 write_lock_irq(&vcc_sklist_lock); 355 if (test_bit(ATM_DF_REMOVED, &dev->flags) || 356 (error = find_ci(vcc, &vpi, &vci))) { 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; 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, 390 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); 391 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, 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; 415 416 pr_debug("vcc_connect (vpi %d, vci %d)\n",vpi,vci); 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; 429 pr_debug("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " 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; 442 if (likely(itf != ATM_ITF_ANY)) { 443 dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); 444 } else { 445 dev = NULL; 446 mutex_lock(&atm_dev_mutex); 447 if (!list_empty(&atm_devs)) { 448 dev = list_entry(atm_devs.next, struct atm_dev, dev_list); 449 atm_dev_hold(dev); 450 } 451 mutex_unlock(&atm_dev_mutex); 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; 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; 489 490 copied = skb->len; 491 if (copied > size) { 492 copied = size; 493 msg->msg_flags |= MSG_TRUNC; 494 } 495 496 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 497 if (error) 498 return error; 499 sock_recv_ts_and_drops(msg, sk, skb); 500 pr_debug("RcvM %d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize); 501 atm_return(vcc, skb->truesize); 502 skb_free_datagram(sk, skb); 503 return copied; 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 } 549 550 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; 596 597 sock_poll_wait(file, sk->sk_sleep, wait); 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 } 647 648 649 static int check_tp(const struct atm_trafprm *tp) 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 } 664 665 666 static int check_qos(const struct atm_qos *qos) 667 { 668 int error; 669 670 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) 671 return -EINVAL; 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, 682 char __user *optval, unsigned int optlen) 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 } 782 if ((error = atm_proc_init()) < 0) { 783 printk(KERN_ERR "atm_proc_init() failed with %d\n",error); 784 goto out_atmsvc_exit; 785 } 786 if ((error = atm_sysfs_init()) < 0) { 787 printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error); 788 goto out_atmproc_exit; 789 } 790 out: 791 return error; 792 out_atmproc_exit: 793 atm_proc_exit(); 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(); 806 atm_sysfs_exit(); 807 atmsvc_exit(); 808 atmpvc_exit(); 809 proto_unregister(&vcc_proto); 810 } 811 812 subsys_initcall(atm_init); 813 814 module_exit(atm_exit); 815 816 MODULE_LICENSE("GPL"); 817 MODULE_ALIAS_NETPROTO(PF_ATMPVC); 818 MODULE_ALIAS_NETPROTO(PF_ATMSVC); 819