1 /* net/atm/common.c - ATM sockets (common part for PVC and SVC) */ 2 3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ 4 5 6 #include <linux/config.h> 7 #include <linux/module.h> 8 #include <linux/kmod.h> 9 #include <linux/net.h> /* struct socket, struct proto_ops */ 10 #include <linux/atm.h> /* ATM stuff */ 11 #include <linux/atmdev.h> 12 #include <linux/socket.h> /* SOL_SOCKET */ 13 #include <linux/errno.h> /* error codes */ 14 #include <linux/capability.h> 15 #include <linux/mm.h> /* verify_area */ 16 #include <linux/sched.h> 17 #include <linux/time.h> /* struct timeval */ 18 #include <linux/skbuff.h> 19 #include <linux/bitops.h> 20 #include <linux/init.h> 21 #include <net/sock.h> /* struct sock */ 22 23 #include <asm/uaccess.h> 24 #include <asm/atomic.h> 25 #include <asm/poll.h> 26 27 28 #include "resources.h" /* atm_find_dev */ 29 #include "common.h" /* prototypes */ 30 #include "protocols.h" /* atm_init_<transport> */ 31 #include "addr.h" /* address registry */ 32 #include "signaling.h" /* for WAITING and sigd_attach */ 33 34 35 #if 0 36 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args) 37 #else 38 #define DPRINTK(format,args...) 39 #endif 40 41 struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; 42 DEFINE_RWLOCK(vcc_sklist_lock); 43 44 static void __vcc_insert_socket(struct sock *sk) 45 { 46 struct atm_vcc *vcc = atm_sk(sk); 47 struct hlist_head *head = &vcc_hash[vcc->vci & 48 (VCC_HTABLE_SIZE - 1)]; 49 sk->sk_hashent = vcc->vci & (VCC_HTABLE_SIZE - 1); 50 sk_add_node(sk, head); 51 } 52 53 void vcc_insert_socket(struct sock *sk) 54 { 55 write_lock_irq(&vcc_sklist_lock); 56 __vcc_insert_socket(sk); 57 write_unlock_irq(&vcc_sklist_lock); 58 } 59 60 static void vcc_remove_socket(struct sock *sk) 61 { 62 write_lock_irq(&vcc_sklist_lock); 63 sk_del_node_init(sk); 64 write_unlock_irq(&vcc_sklist_lock); 65 } 66 67 68 static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size) 69 { 70 struct sk_buff *skb; 71 struct sock *sk = sk_atm(vcc); 72 73 if (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) { 74 DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", 75 atomic_read(&sk->sk_wmem_alloc), size, 76 sk->sk_sndbuf); 77 return NULL; 78 } 79 while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule(); 80 DPRINTK("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc), 81 skb->truesize); 82 atomic_add(skb->truesize, &sk->sk_wmem_alloc); 83 return skb; 84 } 85 86 87 EXPORT_SYMBOL(vcc_hash); 88 EXPORT_SYMBOL(vcc_sklist_lock); 89 EXPORT_SYMBOL(vcc_insert_socket); 90 91 static void vcc_sock_destruct(struct sock *sk) 92 { 93 if (atomic_read(&sk->sk_rmem_alloc)) 94 printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc)); 95 96 if (atomic_read(&sk->sk_wmem_alloc)) 97 printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc)); 98 } 99 100 static void vcc_def_wakeup(struct sock *sk) 101 { 102 read_lock(&sk->sk_callback_lock); 103 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) 104 wake_up(sk->sk_sleep); 105 read_unlock(&sk->sk_callback_lock); 106 } 107 108 static inline int vcc_writable(struct sock *sk) 109 { 110 struct atm_vcc *vcc = atm_sk(sk); 111 112 return (vcc->qos.txtp.max_sdu + 113 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; 114 } 115 116 static void vcc_write_space(struct sock *sk) 117 { 118 read_lock(&sk->sk_callback_lock); 119 120 if (vcc_writable(sk)) { 121 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) 122 wake_up_interruptible(sk->sk_sleep); 123 124 sk_wake_async(sk, 2, POLL_OUT); 125 } 126 127 read_unlock(&sk->sk_callback_lock); 128 } 129 130 static struct proto vcc_proto = { 131 .name = "VCC", 132 .owner = THIS_MODULE, 133 .obj_size = sizeof(struct atm_vcc), 134 }; 135 136 int vcc_create(struct socket *sock, int protocol, int family) 137 { 138 struct sock *sk; 139 struct atm_vcc *vcc; 140 141 sock->sk = NULL; 142 if (sock->type == SOCK_STREAM) 143 return -EINVAL; 144 sk = sk_alloc(family, GFP_KERNEL, &vcc_proto, 1); 145 if (!sk) 146 return -ENOMEM; 147 sock_init_data(sock, sk); 148 sk->sk_state_change = vcc_def_wakeup; 149 sk->sk_write_space = vcc_write_space; 150 151 vcc = atm_sk(sk); 152 vcc->dev = NULL; 153 memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc)); 154 memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc)); 155 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ 156 atomic_set(&sk->sk_wmem_alloc, 0); 157 atomic_set(&sk->sk_rmem_alloc, 0); 158 vcc->push = NULL; 159 vcc->pop = NULL; 160 vcc->push_oam = NULL; 161 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ 162 vcc->atm_options = vcc->aal_options = 0; 163 sk->sk_destruct = vcc_sock_destruct; 164 return 0; 165 } 166 167 168 static void vcc_destroy_socket(struct sock *sk) 169 { 170 struct atm_vcc *vcc = atm_sk(sk); 171 struct sk_buff *skb; 172 173 set_bit(ATM_VF_CLOSE, &vcc->flags); 174 clear_bit(ATM_VF_READY, &vcc->flags); 175 if (vcc->dev) { 176 if (vcc->dev->ops->close) 177 vcc->dev->ops->close(vcc); 178 if (vcc->push) 179 vcc->push(vcc, NULL); /* atmarpd has no push */ 180 181 vcc_remove_socket(sk); /* no more receive */ 182 183 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 184 atm_return(vcc,skb->truesize); 185 kfree_skb(skb); 186 } 187 188 module_put(vcc->dev->ops->owner); 189 atm_dev_put(vcc->dev); 190 } 191 } 192 193 194 int vcc_release(struct socket *sock) 195 { 196 struct sock *sk = sock->sk; 197 198 if (sk) { 199 lock_sock(sk); 200 vcc_destroy_socket(sock->sk); 201 release_sock(sk); 202 sock_put(sk); 203 } 204 205 return 0; 206 } 207 208 209 void vcc_release_async(struct atm_vcc *vcc, int reply) 210 { 211 struct sock *sk = sk_atm(vcc); 212 213 set_bit(ATM_VF_CLOSE, &vcc->flags); 214 sk->sk_shutdown |= RCV_SHUTDOWN; 215 sk->sk_err = -reply; 216 clear_bit(ATM_VF_WAITING, &vcc->flags); 217 sk->sk_state_change(sk); 218 } 219 220 221 EXPORT_SYMBOL(vcc_release_async); 222 223 224 static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) 225 { 226 int max_sdu; 227 228 if (!tp->traffic_class) return 0; 229 switch (aal) { 230 case ATM_AAL0: 231 max_sdu = ATM_CELL_SIZE-1; 232 break; 233 case ATM_AAL34: 234 max_sdu = ATM_MAX_AAL34_PDU; 235 break; 236 default: 237 printk(KERN_WARNING "ATM: AAL problems ... " 238 "(%d)\n",aal); 239 /* fall through */ 240 case ATM_AAL5: 241 max_sdu = ATM_MAX_AAL5_PDU; 242 } 243 if (!tp->max_sdu) tp->max_sdu = max_sdu; 244 else if (tp->max_sdu > max_sdu) return -EINVAL; 245 if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV; 246 return 0; 247 } 248 249 250 static int check_ci(struct atm_vcc *vcc, short vpi, int vci) 251 { 252 struct hlist_head *head = &vcc_hash[vci & 253 (VCC_HTABLE_SIZE - 1)]; 254 struct hlist_node *node; 255 struct sock *s; 256 struct atm_vcc *walk; 257 258 sk_for_each(s, node, head) { 259 walk = atm_sk(s); 260 if (walk->dev != vcc->dev) 261 continue; 262 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && 263 walk->vci == vci && ((walk->qos.txtp.traffic_class != 264 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || 265 (walk->qos.rxtp.traffic_class != ATM_NONE && 266 vcc->qos.rxtp.traffic_class != ATM_NONE))) 267 return -EADDRINUSE; 268 } 269 270 /* allow VCCs with same VPI/VCI iff they don't collide on 271 TX/RX (but we may refuse such sharing for other reasons, 272 e.g. if protocol requires to have both channels) */ 273 274 return 0; 275 } 276 277 278 static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci) 279 { 280 static short p; /* poor man's per-device cache */ 281 static int c; 282 short old_p; 283 int old_c; 284 int err; 285 286 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { 287 err = check_ci(vcc, *vpi, *vci); 288 return err; 289 } 290 /* last scan may have left values out of bounds for current device */ 291 if (*vpi != ATM_VPI_ANY) 292 p = *vpi; 293 else if (p >= 1 << vcc->dev->ci_range.vpi_bits) 294 p = 0; 295 if (*vci != ATM_VCI_ANY) 296 c = *vci; 297 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) 298 c = ATM_NOT_RSV_VCI; 299 old_p = p; 300 old_c = c; 301 do { 302 if (!check_ci(vcc, p, c)) { 303 *vpi = p; 304 *vci = c; 305 return 0; 306 } 307 if (*vci == ATM_VCI_ANY) { 308 c++; 309 if (c >= 1 << vcc->dev->ci_range.vci_bits) 310 c = ATM_NOT_RSV_VCI; 311 } 312 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && 313 *vpi == ATM_VPI_ANY) { 314 p++; 315 if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0; 316 } 317 } 318 while (old_p != p || old_c != c); 319 return -EADDRINUSE; 320 } 321 322 323 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, 324 int vci) 325 { 326 struct sock *sk = sk_atm(vcc); 327 int error; 328 329 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && 330 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && 331 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) 332 return -EINVAL; 333 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) 334 return -EPERM; 335 error = 0; 336 if (!try_module_get(dev->ops->owner)) 337 return -ENODEV; 338 vcc->dev = dev; 339 write_lock_irq(&vcc_sklist_lock); 340 if ((error = find_ci(vcc, &vpi, &vci))) { 341 write_unlock_irq(&vcc_sklist_lock); 342 goto fail_module_put; 343 } 344 vcc->vpi = vpi; 345 vcc->vci = vci; 346 __vcc_insert_socket(sk); 347 write_unlock_irq(&vcc_sklist_lock); 348 switch (vcc->qos.aal) { 349 case ATM_AAL0: 350 error = atm_init_aal0(vcc); 351 vcc->stats = &dev->stats.aal0; 352 break; 353 case ATM_AAL34: 354 error = atm_init_aal34(vcc); 355 vcc->stats = &dev->stats.aal34; 356 break; 357 case ATM_NO_AAL: 358 /* ATM_AAL5 is also used in the "0 for default" case */ 359 vcc->qos.aal = ATM_AAL5; 360 /* fall through */ 361 case ATM_AAL5: 362 error = atm_init_aal5(vcc); 363 vcc->stats = &dev->stats.aal5; 364 break; 365 default: 366 error = -EPROTOTYPE; 367 } 368 if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal); 369 if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal); 370 if (error) 371 goto fail; 372 DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); 373 DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class, 374 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); 375 DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, 376 vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu); 377 378 if (dev->ops->open) { 379 if ((error = dev->ops->open(vcc))) 380 goto fail; 381 } 382 return 0; 383 384 fail: 385 vcc_remove_socket(sk); 386 fail_module_put: 387 module_put(dev->ops->owner); 388 /* ensure we get dev module ref count correct */ 389 vcc->dev = NULL; 390 return error; 391 } 392 393 394 int vcc_connect(struct socket *sock, int itf, short vpi, int vci) 395 { 396 struct atm_dev *dev; 397 struct atm_vcc *vcc = ATM_SD(sock); 398 int error; 399 400 DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci); 401 if (sock->state == SS_CONNECTED) 402 return -EISCONN; 403 if (sock->state != SS_UNCONNECTED) 404 return -EINVAL; 405 if (!(vpi || vci)) 406 return -EINVAL; 407 408 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) 409 clear_bit(ATM_VF_PARTIAL,&vcc->flags); 410 else 411 if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) 412 return -EINVAL; 413 DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " 414 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", 415 vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr, 416 vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu, 417 vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr, 418 vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu, 419 vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" : 420 " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); 421 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) 422 return -EBADFD; 423 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || 424 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) 425 return -EINVAL; 426 if (itf != ATM_ITF_ANY) { 427 dev = atm_dev_lookup(itf); 428 if (!dev) 429 return -ENODEV; 430 error = __vcc_connect(vcc, dev, vpi, vci); 431 if (error) { 432 atm_dev_put(dev); 433 return error; 434 } 435 } else { 436 struct list_head *p, *next; 437 438 dev = NULL; 439 spin_lock(&atm_dev_lock); 440 list_for_each_safe(p, next, &atm_devs) { 441 dev = list_entry(p, struct atm_dev, dev_list); 442 atm_dev_hold(dev); 443 spin_unlock(&atm_dev_lock); 444 if (!__vcc_connect(vcc, dev, vpi, vci)) 445 break; 446 atm_dev_put(dev); 447 dev = NULL; 448 spin_lock(&atm_dev_lock); 449 } 450 spin_unlock(&atm_dev_lock); 451 if (!dev) 452 return -ENODEV; 453 } 454 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) 455 set_bit(ATM_VF_PARTIAL,&vcc->flags); 456 if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags)) 457 sock->state = SS_CONNECTED; 458 return 0; 459 } 460 461 462 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 463 size_t size, int flags) 464 { 465 struct sock *sk = sock->sk; 466 struct atm_vcc *vcc; 467 struct sk_buff *skb; 468 int copied, error = -EINVAL; 469 470 if (sock->state != SS_CONNECTED) 471 return -ENOTCONN; 472 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ 473 return -EOPNOTSUPP; 474 vcc = ATM_SD(sock); 475 if (test_bit(ATM_VF_RELEASED,&vcc->flags) || 476 test_bit(ATM_VF_CLOSE,&vcc->flags) || 477 !test_bit(ATM_VF_READY, &vcc->flags)) 478 return 0; 479 480 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); 481 if (!skb) 482 return error; 483 484 copied = skb->len; 485 if (copied > size) { 486 copied = size; 487 msg->msg_flags |= MSG_TRUNC; 488 } 489 490 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 491 if (error) 492 return error; 493 sock_recv_timestamp(msg, sk, skb); 494 DPRINTK("RcvM %d -= %d\n", atomic_read(&sk->rmem_alloc), skb->truesize); 495 atm_return(vcc, skb->truesize); 496 skb_free_datagram(sk, skb); 497 return copied; 498 } 499 500 501 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, 502 size_t total_len) 503 { 504 struct sock *sk = sock->sk; 505 DEFINE_WAIT(wait); 506 struct atm_vcc *vcc; 507 struct sk_buff *skb; 508 int eff,error; 509 const void __user *buff; 510 int size; 511 512 lock_sock(sk); 513 if (sock->state != SS_CONNECTED) { 514 error = -ENOTCONN; 515 goto out; 516 } 517 if (m->msg_name) { 518 error = -EISCONN; 519 goto out; 520 } 521 if (m->msg_iovlen != 1) { 522 error = -ENOSYS; /* fix this later @@@ */ 523 goto out; 524 } 525 buff = m->msg_iov->iov_base; 526 size = m->msg_iov->iov_len; 527 vcc = ATM_SD(sock); 528 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 529 test_bit(ATM_VF_CLOSE, &vcc->flags) || 530 !test_bit(ATM_VF_READY, &vcc->flags)) { 531 error = -EPIPE; 532 send_sig(SIGPIPE, current, 0); 533 goto out; 534 } 535 if (!size) { 536 error = 0; 537 goto out; 538 } 539 if (size < 0 || size > vcc->qos.txtp.max_sdu) { 540 error = -EMSGSIZE; 541 goto out; 542 } 543 /* verify_area is done by net/socket.c */ 544 eff = (size+3) & ~3; /* align to word boundary */ 545 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 546 error = 0; 547 while (!(skb = alloc_tx(vcc,eff))) { 548 if (m->msg_flags & MSG_DONTWAIT) { 549 error = -EAGAIN; 550 break; 551 } 552 schedule(); 553 if (signal_pending(current)) { 554 error = -ERESTARTSYS; 555 break; 556 } 557 if (test_bit(ATM_VF_RELEASED,&vcc->flags) || 558 test_bit(ATM_VF_CLOSE,&vcc->flags) || 559 !test_bit(ATM_VF_READY,&vcc->flags)) { 560 error = -EPIPE; 561 send_sig(SIGPIPE, current, 0); 562 break; 563 } 564 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 565 } 566 finish_wait(sk->sk_sleep, &wait); 567 if (error) 568 goto out; 569 skb->dev = NULL; /* for paths shared with net_device interfaces */ 570 ATM_SKB(skb)->atm_options = vcc->atm_options; 571 if (copy_from_user(skb_put(skb,size),buff,size)) { 572 kfree_skb(skb); 573 error = -EFAULT; 574 goto out; 575 } 576 if (eff != size) memset(skb->data+size,0,eff-size); 577 error = vcc->dev->ops->send(vcc,skb); 578 error = error ? error : size; 579 out: 580 release_sock(sk); 581 return error; 582 } 583 584 585 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) 586 { 587 struct sock *sk = sock->sk; 588 struct atm_vcc *vcc; 589 unsigned int mask; 590 591 poll_wait(file, sk->sk_sleep, wait); 592 mask = 0; 593 594 vcc = ATM_SD(sock); 595 596 /* exceptional events */ 597 if (sk->sk_err) 598 mask = POLLERR; 599 600 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 601 test_bit(ATM_VF_CLOSE, &vcc->flags)) 602 mask |= POLLHUP; 603 604 /* readable? */ 605 if (!skb_queue_empty(&sk->sk_receive_queue)) 606 mask |= POLLIN | POLLRDNORM; 607 608 /* writable? */ 609 if (sock->state == SS_CONNECTING && 610 test_bit(ATM_VF_WAITING, &vcc->flags)) 611 return mask; 612 613 if (vcc->qos.txtp.traffic_class != ATM_NONE && 614 vcc_writable(sk)) 615 mask |= POLLOUT | POLLWRNORM | POLLWRBAND; 616 617 return mask; 618 } 619 620 621 static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) 622 { 623 int error; 624 625 /* 626 * Don't let the QoS change the already connected AAL type nor the 627 * traffic class. 628 */ 629 if (qos->aal != vcc->qos.aal || 630 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || 631 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) 632 return -EINVAL; 633 error = adjust_tp(&qos->txtp,qos->aal); 634 if (!error) error = adjust_tp(&qos->rxtp,qos->aal); 635 if (error) return error; 636 if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP; 637 if (sk_atm(vcc)->sk_family == AF_ATMPVC) 638 return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET); 639 return svc_change_qos(vcc,qos); 640 } 641 642 643 static int check_tp(struct atm_trafprm *tp) 644 { 645 /* @@@ Should be merged with adjust_tp */ 646 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0; 647 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && 648 !tp->max_pcr) return -EINVAL; 649 if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL; 650 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && 651 tp->min_pcr > tp->max_pcr) return -EINVAL; 652 /* 653 * We allow pcr to be outside [min_pcr,max_pcr], because later 654 * adjustment may still push it in the valid range. 655 */ 656 return 0; 657 } 658 659 660 static int check_qos(struct atm_qos *qos) 661 { 662 int error; 663 664 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) 665 return -EINVAL; 666 if (qos->txtp.traffic_class != qos->rxtp.traffic_class && 667 qos->txtp.traffic_class && qos->rxtp.traffic_class && 668 qos->txtp.traffic_class != ATM_ANYCLASS && 669 qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL; 670 error = check_tp(&qos->txtp); 671 if (error) return error; 672 return check_tp(&qos->rxtp); 673 } 674 675 int vcc_setsockopt(struct socket *sock, int level, int optname, 676 char __user *optval, int optlen) 677 { 678 struct atm_vcc *vcc; 679 unsigned long value; 680 int error; 681 682 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) 683 return -EINVAL; 684 685 vcc = ATM_SD(sock); 686 switch (optname) { 687 case SO_ATMQOS: 688 { 689 struct atm_qos qos; 690 691 if (copy_from_user(&qos,optval,sizeof(qos))) 692 return -EFAULT; 693 error = check_qos(&qos); 694 if (error) return error; 695 if (sock->state == SS_CONNECTED) 696 return atm_change_qos(vcc,&qos); 697 if (sock->state != SS_UNCONNECTED) 698 return -EBADFD; 699 vcc->qos = qos; 700 set_bit(ATM_VF_HASQOS,&vcc->flags); 701 return 0; 702 } 703 case SO_SETCLP: 704 if (get_user(value,(unsigned long __user *)optval)) 705 return -EFAULT; 706 if (value) vcc->atm_options |= ATM_ATMOPT_CLP; 707 else vcc->atm_options &= ~ATM_ATMOPT_CLP; 708 return 0; 709 default: 710 if (level == SOL_SOCKET) return -EINVAL; 711 break; 712 } 713 if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL; 714 return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen); 715 } 716 717 718 int vcc_getsockopt(struct socket *sock, int level, int optname, 719 char __user *optval, int __user *optlen) 720 { 721 struct atm_vcc *vcc; 722 int len; 723 724 if (get_user(len, optlen)) 725 return -EFAULT; 726 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) 727 return -EINVAL; 728 729 vcc = ATM_SD(sock); 730 switch (optname) { 731 case SO_ATMQOS: 732 if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) 733 return -EINVAL; 734 return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ? 735 -EFAULT : 0; 736 case SO_SETCLP: 737 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 738 0,(unsigned long __user *)optval) ? -EFAULT : 0; 739 case SO_ATMPVC: 740 { 741 struct sockaddr_atmpvc pvc; 742 743 if (!vcc->dev || 744 !test_bit(ATM_VF_ADDR,&vcc->flags)) 745 return -ENOTCONN; 746 pvc.sap_family = AF_ATMPVC; 747 pvc.sap_addr.itf = vcc->dev->number; 748 pvc.sap_addr.vpi = vcc->vpi; 749 pvc.sap_addr.vci = vcc->vci; 750 return copy_to_user(optval,&pvc,sizeof(pvc)) ? 751 -EFAULT : 0; 752 } 753 default: 754 if (level == SOL_SOCKET) return -EINVAL; 755 break; 756 } 757 if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL; 758 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); 759 } 760 761 static int __init atm_init(void) 762 { 763 int error; 764 765 if ((error = proto_register(&vcc_proto, 0)) < 0) 766 goto out; 767 768 if ((error = atmpvc_init()) < 0) { 769 printk(KERN_ERR "atmpvc_init() failed with %d\n", error); 770 goto out_unregister_vcc_proto; 771 } 772 if ((error = atmsvc_init()) < 0) { 773 printk(KERN_ERR "atmsvc_init() failed with %d\n", error); 774 goto out_atmpvc_exit; 775 } 776 if ((error = atm_proc_init()) < 0) { 777 printk(KERN_ERR "atm_proc_init() failed with %d\n",error); 778 goto out_atmsvc_exit; 779 } 780 out: 781 return error; 782 out_atmsvc_exit: 783 atmsvc_exit(); 784 out_atmpvc_exit: 785 atmsvc_exit(); 786 out_unregister_vcc_proto: 787 proto_unregister(&vcc_proto); 788 goto out; 789 } 790 791 static void __exit atm_exit(void) 792 { 793 atm_proc_exit(); 794 atmsvc_exit(); 795 atmpvc_exit(); 796 proto_unregister(&vcc_proto); 797 } 798 799 module_init(atm_init); 800 module_exit(atm_exit); 801 802 MODULE_LICENSE("GPL"); 803 MODULE_ALIAS_NETPROTO(PF_ATMPVC); 804 MODULE_ALIAS_NETPROTO(PF_ATMSVC); 805