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> 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_hash = 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 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 182 atm_return(vcc,skb->truesize); 183 kfree_skb(skb); 184 } 185 186 module_put(vcc->dev->ops->owner); 187 atm_dev_put(vcc->dev); 188 } 189 190 vcc_remove_socket(sk); 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 void atm_dev_release_vccs(struct atm_dev *dev) 225 { 226 int i; 227 228 write_lock_irq(&vcc_sklist_lock); 229 for (i = 0; i < VCC_HTABLE_SIZE; i++) { 230 struct hlist_head *head = &vcc_hash[i]; 231 struct hlist_node *node, *tmp; 232 struct sock *s; 233 struct atm_vcc *vcc; 234 235 sk_for_each_safe(s, node, tmp, head) { 236 vcc = atm_sk(s); 237 if (vcc->dev == dev) { 238 vcc_release_async(vcc, -EPIPE); 239 sk_del_node_init(s); 240 } 241 } 242 } 243 write_unlock_irq(&vcc_sklist_lock); 244 } 245 246 247 static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) 248 { 249 int max_sdu; 250 251 if (!tp->traffic_class) return 0; 252 switch (aal) { 253 case ATM_AAL0: 254 max_sdu = ATM_CELL_SIZE-1; 255 break; 256 case ATM_AAL34: 257 max_sdu = ATM_MAX_AAL34_PDU; 258 break; 259 default: 260 printk(KERN_WARNING "ATM: AAL problems ... " 261 "(%d)\n",aal); 262 /* fall through */ 263 case ATM_AAL5: 264 max_sdu = ATM_MAX_AAL5_PDU; 265 } 266 if (!tp->max_sdu) tp->max_sdu = max_sdu; 267 else if (tp->max_sdu > max_sdu) return -EINVAL; 268 if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV; 269 return 0; 270 } 271 272 273 static int check_ci(struct atm_vcc *vcc, short vpi, int vci) 274 { 275 struct hlist_head *head = &vcc_hash[vci & 276 (VCC_HTABLE_SIZE - 1)]; 277 struct hlist_node *node; 278 struct sock *s; 279 struct atm_vcc *walk; 280 281 sk_for_each(s, node, head) { 282 walk = atm_sk(s); 283 if (walk->dev != vcc->dev) 284 continue; 285 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && 286 walk->vci == vci && ((walk->qos.txtp.traffic_class != 287 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || 288 (walk->qos.rxtp.traffic_class != ATM_NONE && 289 vcc->qos.rxtp.traffic_class != ATM_NONE))) 290 return -EADDRINUSE; 291 } 292 293 /* allow VCCs with same VPI/VCI iff they don't collide on 294 TX/RX (but we may refuse such sharing for other reasons, 295 e.g. if protocol requires to have both channels) */ 296 297 return 0; 298 } 299 300 301 static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci) 302 { 303 static short p; /* poor man's per-device cache */ 304 static int c; 305 short old_p; 306 int old_c; 307 int err; 308 309 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { 310 err = check_ci(vcc, *vpi, *vci); 311 return err; 312 } 313 /* last scan may have left values out of bounds for current device */ 314 if (*vpi != ATM_VPI_ANY) 315 p = *vpi; 316 else if (p >= 1 << vcc->dev->ci_range.vpi_bits) 317 p = 0; 318 if (*vci != ATM_VCI_ANY) 319 c = *vci; 320 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) 321 c = ATM_NOT_RSV_VCI; 322 old_p = p; 323 old_c = c; 324 do { 325 if (!check_ci(vcc, p, c)) { 326 *vpi = p; 327 *vci = c; 328 return 0; 329 } 330 if (*vci == ATM_VCI_ANY) { 331 c++; 332 if (c >= 1 << vcc->dev->ci_range.vci_bits) 333 c = ATM_NOT_RSV_VCI; 334 } 335 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && 336 *vpi == ATM_VPI_ANY) { 337 p++; 338 if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0; 339 } 340 } 341 while (old_p != p || old_c != c); 342 return -EADDRINUSE; 343 } 344 345 346 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, 347 int vci) 348 { 349 struct sock *sk = sk_atm(vcc); 350 int error; 351 352 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && 353 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && 354 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) 355 return -EINVAL; 356 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) 357 return -EPERM; 358 error = -ENODEV; 359 if (!try_module_get(dev->ops->owner)) 360 return error; 361 vcc->dev = dev; 362 write_lock_irq(&vcc_sklist_lock); 363 if (test_bit(ATM_DF_REMOVED, &dev->flags) || 364 (error = find_ci(vcc, &vpi, &vci))) { 365 write_unlock_irq(&vcc_sklist_lock); 366 goto fail_module_put; 367 } 368 vcc->vpi = vpi; 369 vcc->vci = vci; 370 __vcc_insert_socket(sk); 371 write_unlock_irq(&vcc_sklist_lock); 372 switch (vcc->qos.aal) { 373 case ATM_AAL0: 374 error = atm_init_aal0(vcc); 375 vcc->stats = &dev->stats.aal0; 376 break; 377 case ATM_AAL34: 378 error = atm_init_aal34(vcc); 379 vcc->stats = &dev->stats.aal34; 380 break; 381 case ATM_NO_AAL: 382 /* ATM_AAL5 is also used in the "0 for default" case */ 383 vcc->qos.aal = ATM_AAL5; 384 /* fall through */ 385 case ATM_AAL5: 386 error = atm_init_aal5(vcc); 387 vcc->stats = &dev->stats.aal5; 388 break; 389 default: 390 error = -EPROTOTYPE; 391 } 392 if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal); 393 if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal); 394 if (error) 395 goto fail; 396 DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); 397 DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class, 398 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); 399 DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, 400 vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu); 401 402 if (dev->ops->open) { 403 if ((error = dev->ops->open(vcc))) 404 goto fail; 405 } 406 return 0; 407 408 fail: 409 vcc_remove_socket(sk); 410 fail_module_put: 411 module_put(dev->ops->owner); 412 /* ensure we get dev module ref count correct */ 413 vcc->dev = NULL; 414 return error; 415 } 416 417 418 int vcc_connect(struct socket *sock, int itf, short vpi, int vci) 419 { 420 struct atm_dev *dev; 421 struct atm_vcc *vcc = ATM_SD(sock); 422 int error; 423 424 DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci); 425 if (sock->state == SS_CONNECTED) 426 return -EISCONN; 427 if (sock->state != SS_UNCONNECTED) 428 return -EINVAL; 429 if (!(vpi || vci)) 430 return -EINVAL; 431 432 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) 433 clear_bit(ATM_VF_PARTIAL,&vcc->flags); 434 else 435 if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) 436 return -EINVAL; 437 DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " 438 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", 439 vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr, 440 vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu, 441 vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr, 442 vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu, 443 vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" : 444 " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); 445 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) 446 return -EBADFD; 447 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || 448 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) 449 return -EINVAL; 450 if (likely(itf != ATM_ITF_ANY)) { 451 dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); 452 } else { 453 dev = NULL; 454 mutex_lock(&atm_dev_mutex); 455 if (!list_empty(&atm_devs)) { 456 dev = list_entry(atm_devs.next, struct atm_dev, dev_list); 457 atm_dev_hold(dev); 458 } 459 mutex_unlock(&atm_dev_mutex); 460 } 461 if (!dev) 462 return -ENODEV; 463 error = __vcc_connect(vcc, dev, vpi, vci); 464 if (error) { 465 atm_dev_put(dev); 466 return error; 467 } 468 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) 469 set_bit(ATM_VF_PARTIAL,&vcc->flags); 470 if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags)) 471 sock->state = SS_CONNECTED; 472 return 0; 473 } 474 475 476 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 477 size_t size, int flags) 478 { 479 struct sock *sk = sock->sk; 480 struct atm_vcc *vcc; 481 struct sk_buff *skb; 482 int copied, error = -EINVAL; 483 484 if (sock->state != SS_CONNECTED) 485 return -ENOTCONN; 486 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ 487 return -EOPNOTSUPP; 488 vcc = ATM_SD(sock); 489 if (test_bit(ATM_VF_RELEASED,&vcc->flags) || 490 test_bit(ATM_VF_CLOSE,&vcc->flags) || 491 !test_bit(ATM_VF_READY, &vcc->flags)) 492 return 0; 493 494 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); 495 if (!skb) 496 return error; 497 498 copied = skb->len; 499 if (copied > size) { 500 copied = size; 501 msg->msg_flags |= MSG_TRUNC; 502 } 503 504 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 505 if (error) 506 return error; 507 sock_recv_timestamp(msg, sk, skb); 508 DPRINTK("RcvM %d -= %d\n", atomic_read(&sk->rmem_alloc), skb->truesize); 509 atm_return(vcc, skb->truesize); 510 skb_free_datagram(sk, skb); 511 return copied; 512 } 513 514 515 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, 516 size_t total_len) 517 { 518 struct sock *sk = sock->sk; 519 DEFINE_WAIT(wait); 520 struct atm_vcc *vcc; 521 struct sk_buff *skb; 522 int eff,error; 523 const void __user *buff; 524 int size; 525 526 lock_sock(sk); 527 if (sock->state != SS_CONNECTED) { 528 error = -ENOTCONN; 529 goto out; 530 } 531 if (m->msg_name) { 532 error = -EISCONN; 533 goto out; 534 } 535 if (m->msg_iovlen != 1) { 536 error = -ENOSYS; /* fix this later @@@ */ 537 goto out; 538 } 539 buff = m->msg_iov->iov_base; 540 size = m->msg_iov->iov_len; 541 vcc = ATM_SD(sock); 542 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 543 test_bit(ATM_VF_CLOSE, &vcc->flags) || 544 !test_bit(ATM_VF_READY, &vcc->flags)) { 545 error = -EPIPE; 546 send_sig(SIGPIPE, current, 0); 547 goto out; 548 } 549 if (!size) { 550 error = 0; 551 goto out; 552 } 553 if (size < 0 || size > vcc->qos.txtp.max_sdu) { 554 error = -EMSGSIZE; 555 goto out; 556 } 557 558 eff = (size+3) & ~3; /* align to word boundary */ 559 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 560 error = 0; 561 while (!(skb = alloc_tx(vcc,eff))) { 562 if (m->msg_flags & MSG_DONTWAIT) { 563 error = -EAGAIN; 564 break; 565 } 566 schedule(); 567 if (signal_pending(current)) { 568 error = -ERESTARTSYS; 569 break; 570 } 571 if (test_bit(ATM_VF_RELEASED,&vcc->flags) || 572 test_bit(ATM_VF_CLOSE,&vcc->flags) || 573 !test_bit(ATM_VF_READY,&vcc->flags)) { 574 error = -EPIPE; 575 send_sig(SIGPIPE, current, 0); 576 break; 577 } 578 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 579 } 580 finish_wait(sk->sk_sleep, &wait); 581 if (error) 582 goto out; 583 skb->dev = NULL; /* for paths shared with net_device interfaces */ 584 ATM_SKB(skb)->atm_options = vcc->atm_options; 585 if (copy_from_user(skb_put(skb,size),buff,size)) { 586 kfree_skb(skb); 587 error = -EFAULT; 588 goto out; 589 } 590 if (eff != size) memset(skb->data+size,0,eff-size); 591 error = vcc->dev->ops->send(vcc,skb); 592 error = error ? error : size; 593 out: 594 release_sock(sk); 595 return error; 596 } 597 598 599 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) 600 { 601 struct sock *sk = sock->sk; 602 struct atm_vcc *vcc; 603 unsigned int mask; 604 605 poll_wait(file, sk->sk_sleep, wait); 606 mask = 0; 607 608 vcc = ATM_SD(sock); 609 610 /* exceptional events */ 611 if (sk->sk_err) 612 mask = POLLERR; 613 614 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 615 test_bit(ATM_VF_CLOSE, &vcc->flags)) 616 mask |= POLLHUP; 617 618 /* readable? */ 619 if (!skb_queue_empty(&sk->sk_receive_queue)) 620 mask |= POLLIN | POLLRDNORM; 621 622 /* writable? */ 623 if (sock->state == SS_CONNECTING && 624 test_bit(ATM_VF_WAITING, &vcc->flags)) 625 return mask; 626 627 if (vcc->qos.txtp.traffic_class != ATM_NONE && 628 vcc_writable(sk)) 629 mask |= POLLOUT | POLLWRNORM | POLLWRBAND; 630 631 return mask; 632 } 633 634 635 static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) 636 { 637 int error; 638 639 /* 640 * Don't let the QoS change the already connected AAL type nor the 641 * traffic class. 642 */ 643 if (qos->aal != vcc->qos.aal || 644 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || 645 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) 646 return -EINVAL; 647 error = adjust_tp(&qos->txtp,qos->aal); 648 if (!error) error = adjust_tp(&qos->rxtp,qos->aal); 649 if (error) return error; 650 if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP; 651 if (sk_atm(vcc)->sk_family == AF_ATMPVC) 652 return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET); 653 return svc_change_qos(vcc,qos); 654 } 655 656 657 static int check_tp(struct atm_trafprm *tp) 658 { 659 /* @@@ Should be merged with adjust_tp */ 660 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0; 661 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && 662 !tp->max_pcr) return -EINVAL; 663 if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL; 664 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && 665 tp->min_pcr > tp->max_pcr) return -EINVAL; 666 /* 667 * We allow pcr to be outside [min_pcr,max_pcr], because later 668 * adjustment may still push it in the valid range. 669 */ 670 return 0; 671 } 672 673 674 static int check_qos(struct atm_qos *qos) 675 { 676 int error; 677 678 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) 679 return -EINVAL; 680 if (qos->txtp.traffic_class != qos->rxtp.traffic_class && 681 qos->txtp.traffic_class && qos->rxtp.traffic_class && 682 qos->txtp.traffic_class != ATM_ANYCLASS && 683 qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL; 684 error = check_tp(&qos->txtp); 685 if (error) return error; 686 return check_tp(&qos->rxtp); 687 } 688 689 int vcc_setsockopt(struct socket *sock, int level, int optname, 690 char __user *optval, int optlen) 691 { 692 struct atm_vcc *vcc; 693 unsigned long value; 694 int error; 695 696 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) 697 return -EINVAL; 698 699 vcc = ATM_SD(sock); 700 switch (optname) { 701 case SO_ATMQOS: 702 { 703 struct atm_qos qos; 704 705 if (copy_from_user(&qos,optval,sizeof(qos))) 706 return -EFAULT; 707 error = check_qos(&qos); 708 if (error) return error; 709 if (sock->state == SS_CONNECTED) 710 return atm_change_qos(vcc,&qos); 711 if (sock->state != SS_UNCONNECTED) 712 return -EBADFD; 713 vcc->qos = qos; 714 set_bit(ATM_VF_HASQOS,&vcc->flags); 715 return 0; 716 } 717 case SO_SETCLP: 718 if (get_user(value,(unsigned long __user *)optval)) 719 return -EFAULT; 720 if (value) vcc->atm_options |= ATM_ATMOPT_CLP; 721 else vcc->atm_options &= ~ATM_ATMOPT_CLP; 722 return 0; 723 default: 724 if (level == SOL_SOCKET) return -EINVAL; 725 break; 726 } 727 if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL; 728 return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen); 729 } 730 731 732 int vcc_getsockopt(struct socket *sock, int level, int optname, 733 char __user *optval, int __user *optlen) 734 { 735 struct atm_vcc *vcc; 736 int len; 737 738 if (get_user(len, optlen)) 739 return -EFAULT; 740 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) 741 return -EINVAL; 742 743 vcc = ATM_SD(sock); 744 switch (optname) { 745 case SO_ATMQOS: 746 if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) 747 return -EINVAL; 748 return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ? 749 -EFAULT : 0; 750 case SO_SETCLP: 751 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 752 0,(unsigned long __user *)optval) ? -EFAULT : 0; 753 case SO_ATMPVC: 754 { 755 struct sockaddr_atmpvc pvc; 756 757 if (!vcc->dev || 758 !test_bit(ATM_VF_ADDR,&vcc->flags)) 759 return -ENOTCONN; 760 pvc.sap_family = AF_ATMPVC; 761 pvc.sap_addr.itf = vcc->dev->number; 762 pvc.sap_addr.vpi = vcc->vpi; 763 pvc.sap_addr.vci = vcc->vci; 764 return copy_to_user(optval,&pvc,sizeof(pvc)) ? 765 -EFAULT : 0; 766 } 767 default: 768 if (level == SOL_SOCKET) return -EINVAL; 769 break; 770 } 771 if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL; 772 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); 773 } 774 775 static int __init atm_init(void) 776 { 777 int error; 778 779 if ((error = proto_register(&vcc_proto, 0)) < 0) 780 goto out; 781 782 if ((error = atmpvc_init()) < 0) { 783 printk(KERN_ERR "atmpvc_init() failed with %d\n", error); 784 goto out_unregister_vcc_proto; 785 } 786 if ((error = atmsvc_init()) < 0) { 787 printk(KERN_ERR "atmsvc_init() failed with %d\n", error); 788 goto out_atmpvc_exit; 789 } 790 if ((error = atm_proc_init()) < 0) { 791 printk(KERN_ERR "atm_proc_init() failed with %d\n",error); 792 goto out_atmsvc_exit; 793 } 794 out: 795 return error; 796 out_atmsvc_exit: 797 atmsvc_exit(); 798 out_atmpvc_exit: 799 atmsvc_exit(); 800 out_unregister_vcc_proto: 801 proto_unregister(&vcc_proto); 802 goto out; 803 } 804 805 static void __exit atm_exit(void) 806 { 807 atm_proc_exit(); 808 atmsvc_exit(); 809 atmpvc_exit(); 810 proto_unregister(&vcc_proto); 811 } 812 813 module_init(atm_init); 814 module_exit(atm_exit); 815 816 MODULE_LICENSE("GPL"); 817 MODULE_ALIAS_NETPROTO(PF_ATMPVC); 818 MODULE_ALIAS_NETPROTO(PF_ATMSVC); 819