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 #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ 6 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 <linux/slab.h> 22 #include <net/sock.h> /* struct sock */ 23 #include <linux/uaccess.h> 24 #include <linux/poll.h> 25 26 #include <asm/atomic.h> 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 struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; 35 EXPORT_SYMBOL(vcc_hash); 36 37 DEFINE_RWLOCK(vcc_sklist_lock); 38 EXPORT_SYMBOL(vcc_sklist_lock); 39 40 static void __vcc_insert_socket(struct sock *sk) 41 { 42 struct atm_vcc *vcc = atm_sk(sk); 43 struct hlist_head *head = &vcc_hash[vcc->vci & (VCC_HTABLE_SIZE - 1)]; 44 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); 45 sk_add_node(sk, head); 46 } 47 48 void vcc_insert_socket(struct sock *sk) 49 { 50 write_lock_irq(&vcc_sklist_lock); 51 __vcc_insert_socket(sk); 52 write_unlock_irq(&vcc_sklist_lock); 53 } 54 EXPORT_SYMBOL(vcc_insert_socket); 55 56 static void vcc_remove_socket(struct sock *sk) 57 { 58 write_lock_irq(&vcc_sklist_lock); 59 sk_del_node_init(sk); 60 write_unlock_irq(&vcc_sklist_lock); 61 } 62 63 static struct sk_buff *alloc_tx(struct atm_vcc *vcc, unsigned int size) 64 { 65 struct sk_buff *skb; 66 struct sock *sk = sk_atm(vcc); 67 68 if (sk_wmem_alloc_get(sk) && !atm_may_send(vcc, size)) { 69 pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", 70 sk_wmem_alloc_get(sk), size, sk->sk_sndbuf); 71 return NULL; 72 } 73 while (!(skb = alloc_skb(size, GFP_KERNEL))) 74 schedule(); 75 pr_debug("%d += %d\n", sk_wmem_alloc_get(sk), skb->truesize); 76 atomic_add(skb->truesize, &sk->sk_wmem_alloc); 77 return skb; 78 } 79 80 static void vcc_sock_destruct(struct sock *sk) 81 { 82 if (atomic_read(&sk->sk_rmem_alloc)) 83 printk(KERN_DEBUG "%s: rmem leakage (%d bytes) detected.\n", 84 __func__, atomic_read(&sk->sk_rmem_alloc)); 85 86 if (atomic_read(&sk->sk_wmem_alloc)) 87 printk(KERN_DEBUG "%s: wmem leakage (%d bytes) detected.\n", 88 __func__, atomic_read(&sk->sk_wmem_alloc)); 89 } 90 91 static void vcc_def_wakeup(struct sock *sk) 92 { 93 read_lock(&sk->sk_callback_lock); 94 if (sk_has_sleeper(sk)) 95 wake_up(sk_sleep(sk)); 96 read_unlock(&sk->sk_callback_lock); 97 } 98 99 static inline int vcc_writable(struct sock *sk) 100 { 101 struct atm_vcc *vcc = atm_sk(sk); 102 103 return (vcc->qos.txtp.max_sdu + 104 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; 105 } 106 107 static void vcc_write_space(struct sock *sk) 108 { 109 read_lock(&sk->sk_callback_lock); 110 111 if (vcc_writable(sk)) { 112 if (sk_has_sleeper(sk)) 113 wake_up_interruptible(sk_sleep(sk)); 114 115 sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); 116 } 117 118 read_unlock(&sk->sk_callback_lock); 119 } 120 121 static struct proto vcc_proto = { 122 .name = "VCC", 123 .owner = THIS_MODULE, 124 .obj_size = sizeof(struct atm_vcc), 125 }; 126 127 int vcc_create(struct net *net, struct socket *sock, int protocol, int family) 128 { 129 struct sock *sk; 130 struct atm_vcc *vcc; 131 132 sock->sk = NULL; 133 if (sock->type == SOCK_STREAM) 134 return -EINVAL; 135 sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto); 136 if (!sk) 137 return -ENOMEM; 138 sock_init_data(sock, sk); 139 sk->sk_state_change = vcc_def_wakeup; 140 sk->sk_write_space = vcc_write_space; 141 142 vcc = atm_sk(sk); 143 vcc->dev = NULL; 144 memset(&vcc->local, 0, sizeof(struct sockaddr_atmsvc)); 145 memset(&vcc->remote, 0, sizeof(struct sockaddr_atmsvc)); 146 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ 147 atomic_set(&sk->sk_wmem_alloc, 1); 148 atomic_set(&sk->sk_rmem_alloc, 0); 149 vcc->push = NULL; 150 vcc->pop = NULL; 151 vcc->push_oam = NULL; 152 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ 153 vcc->atm_options = vcc->aal_options = 0; 154 sk->sk_destruct = vcc_sock_destruct; 155 return 0; 156 } 157 158 static void vcc_destroy_socket(struct sock *sk) 159 { 160 struct atm_vcc *vcc = atm_sk(sk); 161 struct sk_buff *skb; 162 163 set_bit(ATM_VF_CLOSE, &vcc->flags); 164 clear_bit(ATM_VF_READY, &vcc->flags); 165 if (vcc->dev) { 166 if (vcc->dev->ops->close) 167 vcc->dev->ops->close(vcc); 168 if (vcc->push) 169 vcc->push(vcc, NULL); /* atmarpd has no push */ 170 171 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 172 atm_return(vcc, skb->truesize); 173 kfree_skb(skb); 174 } 175 176 module_put(vcc->dev->ops->owner); 177 atm_dev_put(vcc->dev); 178 } 179 180 vcc_remove_socket(sk); 181 } 182 183 int vcc_release(struct socket *sock) 184 { 185 struct sock *sk = sock->sk; 186 187 if (sk) { 188 lock_sock(sk); 189 vcc_destroy_socket(sock->sk); 190 release_sock(sk); 191 sock_put(sk); 192 } 193 194 return 0; 195 } 196 197 void vcc_release_async(struct atm_vcc *vcc, int reply) 198 { 199 struct sock *sk = sk_atm(vcc); 200 201 set_bit(ATM_VF_CLOSE, &vcc->flags); 202 sk->sk_shutdown |= RCV_SHUTDOWN; 203 sk->sk_err = -reply; 204 clear_bit(ATM_VF_WAITING, &vcc->flags); 205 sk->sk_state_change(sk); 206 } 207 EXPORT_SYMBOL(vcc_release_async); 208 209 210 void atm_dev_release_vccs(struct atm_dev *dev) 211 { 212 int i; 213 214 write_lock_irq(&vcc_sklist_lock); 215 for (i = 0; i < VCC_HTABLE_SIZE; i++) { 216 struct hlist_head *head = &vcc_hash[i]; 217 struct hlist_node *node, *tmp; 218 struct sock *s; 219 struct atm_vcc *vcc; 220 221 sk_for_each_safe(s, node, tmp, head) { 222 vcc = atm_sk(s); 223 if (vcc->dev == dev) { 224 vcc_release_async(vcc, -EPIPE); 225 sk_del_node_init(s); 226 } 227 } 228 } 229 write_unlock_irq(&vcc_sklist_lock); 230 } 231 232 static int adjust_tp(struct atm_trafprm *tp, unsigned char aal) 233 { 234 int max_sdu; 235 236 if (!tp->traffic_class) 237 return 0; 238 switch (aal) { 239 case ATM_AAL0: 240 max_sdu = ATM_CELL_SIZE-1; 241 break; 242 case ATM_AAL34: 243 max_sdu = ATM_MAX_AAL34_PDU; 244 break; 245 default: 246 pr_warning("AAL problems ... (%d)\n", aal); 247 /* fall through */ 248 case ATM_AAL5: 249 max_sdu = ATM_MAX_AAL5_PDU; 250 } 251 if (!tp->max_sdu) 252 tp->max_sdu = max_sdu; 253 else if (tp->max_sdu > max_sdu) 254 return -EINVAL; 255 if (!tp->max_cdv) 256 tp->max_cdv = ATM_MAX_CDV; 257 return 0; 258 } 259 260 static int check_ci(const struct atm_vcc *vcc, short vpi, int vci) 261 { 262 struct hlist_head *head = &vcc_hash[vci & (VCC_HTABLE_SIZE - 1)]; 263 struct hlist_node *node; 264 struct sock *s; 265 struct atm_vcc *walk; 266 267 sk_for_each(s, node, head) { 268 walk = atm_sk(s); 269 if (walk->dev != vcc->dev) 270 continue; 271 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && 272 walk->vci == vci && ((walk->qos.txtp.traffic_class != 273 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || 274 (walk->qos.rxtp.traffic_class != ATM_NONE && 275 vcc->qos.rxtp.traffic_class != ATM_NONE))) 276 return -EADDRINUSE; 277 } 278 279 /* allow VCCs with same VPI/VCI iff they don't collide on 280 TX/RX (but we may refuse such sharing for other reasons, 281 e.g. if protocol requires to have both channels) */ 282 283 return 0; 284 } 285 286 static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci) 287 { 288 static short p; /* poor man's per-device cache */ 289 static int c; 290 short old_p; 291 int old_c; 292 int err; 293 294 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { 295 err = check_ci(vcc, *vpi, *vci); 296 return err; 297 } 298 /* last scan may have left values out of bounds for current device */ 299 if (*vpi != ATM_VPI_ANY) 300 p = *vpi; 301 else if (p >= 1 << vcc->dev->ci_range.vpi_bits) 302 p = 0; 303 if (*vci != ATM_VCI_ANY) 304 c = *vci; 305 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) 306 c = ATM_NOT_RSV_VCI; 307 old_p = p; 308 old_c = c; 309 do { 310 if (!check_ci(vcc, p, c)) { 311 *vpi = p; 312 *vci = c; 313 return 0; 314 } 315 if (*vci == ATM_VCI_ANY) { 316 c++; 317 if (c >= 1 << vcc->dev->ci_range.vci_bits) 318 c = ATM_NOT_RSV_VCI; 319 } 320 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && 321 *vpi == ATM_VPI_ANY) { 322 p++; 323 if (p >= 1 << vcc->dev->ci_range.vpi_bits) 324 p = 0; 325 } 326 } while (old_p != p || old_c != c); 327 return -EADDRINUSE; 328 } 329 330 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, 331 int vci) 332 { 333 struct sock *sk = sk_atm(vcc); 334 int error; 335 336 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && 337 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && 338 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) 339 return -EINVAL; 340 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) 341 return -EPERM; 342 error = -ENODEV; 343 if (!try_module_get(dev->ops->owner)) 344 return error; 345 vcc->dev = dev; 346 write_lock_irq(&vcc_sklist_lock); 347 if (test_bit(ATM_DF_REMOVED, &dev->flags) || 348 (error = find_ci(vcc, &vpi, &vci))) { 349 write_unlock_irq(&vcc_sklist_lock); 350 goto fail_module_put; 351 } 352 vcc->vpi = vpi; 353 vcc->vci = vci; 354 __vcc_insert_socket(sk); 355 write_unlock_irq(&vcc_sklist_lock); 356 switch (vcc->qos.aal) { 357 case ATM_AAL0: 358 error = atm_init_aal0(vcc); 359 vcc->stats = &dev->stats.aal0; 360 break; 361 case ATM_AAL34: 362 error = atm_init_aal34(vcc); 363 vcc->stats = &dev->stats.aal34; 364 break; 365 case ATM_NO_AAL: 366 /* ATM_AAL5 is also used in the "0 for default" case */ 367 vcc->qos.aal = ATM_AAL5; 368 /* fall through */ 369 case ATM_AAL5: 370 error = atm_init_aal5(vcc); 371 vcc->stats = &dev->stats.aal5; 372 break; 373 default: 374 error = -EPROTOTYPE; 375 } 376 if (!error) 377 error = adjust_tp(&vcc->qos.txtp, vcc->qos.aal); 378 if (!error) 379 error = adjust_tp(&vcc->qos.rxtp, vcc->qos.aal); 380 if (error) 381 goto fail; 382 pr_debug("VCC %d.%d, AAL %d\n", vpi, vci, vcc->qos.aal); 383 pr_debug(" TX: %d, PCR %d..%d, SDU %d\n", 384 vcc->qos.txtp.traffic_class, 385 vcc->qos.txtp.min_pcr, 386 vcc->qos.txtp.max_pcr, 387 vcc->qos.txtp.max_sdu); 388 pr_debug(" RX: %d, PCR %d..%d, SDU %d\n", 389 vcc->qos.rxtp.traffic_class, 390 vcc->qos.rxtp.min_pcr, 391 vcc->qos.rxtp.max_pcr, 392 vcc->qos.rxtp.max_sdu); 393 394 if (dev->ops->open) { 395 error = dev->ops->open(vcc); 396 if (error) 397 goto fail; 398 } 399 return 0; 400 401 fail: 402 vcc_remove_socket(sk); 403 fail_module_put: 404 module_put(dev->ops->owner); 405 /* ensure we get dev module ref count correct */ 406 vcc->dev = NULL; 407 return error; 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("(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("(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 ? "" : 436 vcc->qos.aal == ATM_AAL0 ? "" : " ??? code ", 437 vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); 438 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) 439 return -EBADFD; 440 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || 441 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) 442 return -EINVAL; 443 if (likely(itf != ATM_ITF_ANY)) { 444 dev = try_then_request_module(atm_dev_lookup(itf), 445 "atm-device-%d", itf); 446 } else { 447 dev = NULL; 448 mutex_lock(&atm_dev_mutex); 449 if (!list_empty(&atm_devs)) { 450 dev = list_entry(atm_devs.next, 451 struct atm_dev, dev_list); 452 atm_dev_hold(dev); 453 } 454 mutex_unlock(&atm_dev_mutex); 455 } 456 if (!dev) 457 return -ENODEV; 458 error = __vcc_connect(vcc, dev, vpi, vci); 459 if (error) { 460 atm_dev_put(dev); 461 return error; 462 } 463 if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) 464 set_bit(ATM_VF_PARTIAL, &vcc->flags); 465 if (test_bit(ATM_VF_READY, &ATM_SD(sock)->flags)) 466 sock->state = SS_CONNECTED; 467 return 0; 468 } 469 470 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 471 size_t size, int flags) 472 { 473 struct sock *sk = sock->sk; 474 struct atm_vcc *vcc; 475 struct sk_buff *skb; 476 int copied, error = -EINVAL; 477 478 if (sock->state != SS_CONNECTED) 479 return -ENOTCONN; 480 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ 481 return -EOPNOTSUPP; 482 vcc = ATM_SD(sock); 483 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 484 test_bit(ATM_VF_CLOSE, &vcc->flags) || 485 !test_bit(ATM_VF_READY, &vcc->flags)) 486 return 0; 487 488 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); 489 if (!skb) 490 return error; 491 492 copied = skb->len; 493 if (copied > size) { 494 copied = size; 495 msg->msg_flags |= MSG_TRUNC; 496 } 497 498 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 499 if (error) 500 return error; 501 sock_recv_ts_and_drops(msg, sk, skb); 502 pr_debug("%d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize); 503 atm_return(vcc, skb->truesize); 504 skb_free_datagram(sk, skb); 505 return copied; 506 } 507 508 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, 509 size_t total_len) 510 { 511 struct sock *sk = sock->sk; 512 DEFINE_WAIT(wait); 513 struct atm_vcc *vcc; 514 struct sk_buff *skb; 515 int eff, error; 516 const void __user *buff; 517 int size; 518 519 lock_sock(sk); 520 if (sock->state != SS_CONNECTED) { 521 error = -ENOTCONN; 522 goto out; 523 } 524 if (m->msg_name) { 525 error = -EISCONN; 526 goto out; 527 } 528 if (m->msg_iovlen != 1) { 529 error = -ENOSYS; /* fix this later @@@ */ 530 goto out; 531 } 532 buff = m->msg_iov->iov_base; 533 size = m->msg_iov->iov_len; 534 vcc = ATM_SD(sock); 535 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 536 test_bit(ATM_VF_CLOSE, &vcc->flags) || 537 !test_bit(ATM_VF_READY, &vcc->flags)) { 538 error = -EPIPE; 539 send_sig(SIGPIPE, current, 0); 540 goto out; 541 } 542 if (!size) { 543 error = 0; 544 goto out; 545 } 546 if (size < 0 || size > vcc->qos.txtp.max_sdu) { 547 error = -EMSGSIZE; 548 goto out; 549 } 550 551 eff = (size+3) & ~3; /* align to word boundary */ 552 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 553 error = 0; 554 while (!(skb = alloc_tx(vcc, eff))) { 555 if (m->msg_flags & MSG_DONTWAIT) { 556 error = -EAGAIN; 557 break; 558 } 559 schedule(); 560 if (signal_pending(current)) { 561 error = -ERESTARTSYS; 562 break; 563 } 564 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 565 test_bit(ATM_VF_CLOSE, &vcc->flags) || 566 !test_bit(ATM_VF_READY, &vcc->flags)) { 567 error = -EPIPE; 568 send_sig(SIGPIPE, current, 0); 569 break; 570 } 571 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); 572 } 573 finish_wait(sk_sleep(sk), &wait); 574 if (error) 575 goto out; 576 skb->dev = NULL; /* for paths shared with net_device interfaces */ 577 ATM_SKB(skb)->atm_options = vcc->atm_options; 578 if (copy_from_user(skb_put(skb, size), buff, size)) { 579 kfree_skb(skb); 580 error = -EFAULT; 581 goto out; 582 } 583 if (eff != size) 584 memset(skb->data + size, 0, eff-size); 585 error = vcc->dev->ops->send(vcc, skb); 586 error = error ? error : size; 587 out: 588 release_sock(sk); 589 return error; 590 } 591 592 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) 593 { 594 struct sock *sk = sock->sk; 595 struct atm_vcc *vcc; 596 unsigned int mask; 597 598 sock_poll_wait(file, sk_sleep(sk), wait); 599 mask = 0; 600 601 vcc = ATM_SD(sock); 602 603 /* exceptional events */ 604 if (sk->sk_err) 605 mask = POLLERR; 606 607 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 608 test_bit(ATM_VF_CLOSE, &vcc->flags)) 609 mask |= POLLHUP; 610 611 /* readable? */ 612 if (!skb_queue_empty(&sk->sk_receive_queue)) 613 mask |= POLLIN | POLLRDNORM; 614 615 /* writable? */ 616 if (sock->state == SS_CONNECTING && 617 test_bit(ATM_VF_WAITING, &vcc->flags)) 618 return mask; 619 620 if (vcc->qos.txtp.traffic_class != ATM_NONE && 621 vcc_writable(sk)) 622 mask |= POLLOUT | POLLWRNORM | POLLWRBAND; 623 624 return mask; 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) 641 error = adjust_tp(&qos->rxtp, qos->aal); 642 if (error) 643 return error; 644 if (!vcc->dev->ops->change_qos) 645 return -EOPNOTSUPP; 646 if (sk_atm(vcc)->sk_family == AF_ATMPVC) 647 return vcc->dev->ops->change_qos(vcc, qos, ATM_MF_SET); 648 return svc_change_qos(vcc, qos); 649 } 650 651 static int check_tp(const struct atm_trafprm *tp) 652 { 653 /* @@@ Should be merged with adjust_tp */ 654 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) 655 return 0; 656 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && 657 !tp->max_pcr) 658 return -EINVAL; 659 if (tp->min_pcr == ATM_MAX_PCR) 660 return -EINVAL; 661 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && 662 tp->min_pcr > tp->max_pcr) 663 return -EINVAL; 664 /* 665 * We allow pcr to be outside [min_pcr,max_pcr], because later 666 * adjustment may still push it in the valid range. 667 */ 668 return 0; 669 } 670 671 static int check_qos(const struct atm_qos *qos) 672 { 673 int error; 674 675 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) 676 return -EINVAL; 677 if (qos->txtp.traffic_class != qos->rxtp.traffic_class && 678 qos->txtp.traffic_class && qos->rxtp.traffic_class && 679 qos->txtp.traffic_class != ATM_ANYCLASS && 680 qos->rxtp.traffic_class != ATM_ANYCLASS) 681 return -EINVAL; 682 error = check_tp(&qos->txtp); 683 if (error) 684 return error; 685 return check_tp(&qos->rxtp); 686 } 687 688 int vcc_setsockopt(struct socket *sock, int level, int optname, 689 char __user *optval, unsigned int optlen) 690 { 691 struct atm_vcc *vcc; 692 unsigned long value; 693 int error; 694 695 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) 696 return -EINVAL; 697 698 vcc = ATM_SD(sock); 699 switch (optname) { 700 case SO_ATMQOS: 701 { 702 struct atm_qos qos; 703 704 if (copy_from_user(&qos, optval, sizeof(qos))) 705 return -EFAULT; 706 error = check_qos(&qos); 707 if (error) 708 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) 721 vcc->atm_options |= ATM_ATMOPT_CLP; 722 else 723 vcc->atm_options &= ~ATM_ATMOPT_CLP; 724 return 0; 725 default: 726 if (level == SOL_SOCKET) 727 return -EINVAL; 728 break; 729 } 730 if (!vcc->dev || !vcc->dev->ops->setsockopt) 731 return -EINVAL; 732 return vcc->dev->ops->setsockopt(vcc, level, optname, optval, optlen); 733 } 734 735 int vcc_getsockopt(struct socket *sock, int level, int optname, 736 char __user *optval, int __user *optlen) 737 { 738 struct atm_vcc *vcc; 739 int len; 740 741 if (get_user(len, optlen)) 742 return -EFAULT; 743 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) 744 return -EINVAL; 745 746 vcc = ATM_SD(sock); 747 switch (optname) { 748 case SO_ATMQOS: 749 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) 750 return -EINVAL; 751 return copy_to_user(optval, &vcc->qos, sizeof(vcc->qos)) 752 ? -EFAULT : 0; 753 case SO_SETCLP: 754 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 0, 755 (unsigned long __user *)optval) ? -EFAULT : 0; 756 case SO_ATMPVC: 757 { 758 struct sockaddr_atmpvc pvc; 759 760 if (!vcc->dev || !test_bit(ATM_VF_ADDR, &vcc->flags)) 761 return -ENOTCONN; 762 pvc.sap_family = AF_ATMPVC; 763 pvc.sap_addr.itf = vcc->dev->number; 764 pvc.sap_addr.vpi = vcc->vpi; 765 pvc.sap_addr.vci = vcc->vci; 766 return copy_to_user(optval, &pvc, sizeof(pvc)) ? -EFAULT : 0; 767 } 768 default: 769 if (level == SOL_SOCKET) 770 return -EINVAL; 771 break; 772 } 773 if (!vcc->dev || !vcc->dev->ops->getsockopt) 774 return -EINVAL; 775 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); 776 } 777 778 static int __init atm_init(void) 779 { 780 int error; 781 782 error = proto_register(&vcc_proto, 0); 783 if (error < 0) 784 goto out; 785 error = atmpvc_init(); 786 if (error < 0) { 787 pr_err("atmpvc_init() failed with %d\n", error); 788 goto out_unregister_vcc_proto; 789 } 790 error = atmsvc_init(); 791 if (error < 0) { 792 pr_err("atmsvc_init() failed with %d\n", error); 793 goto out_atmpvc_exit; 794 } 795 error = atm_proc_init(); 796 if (error < 0) { 797 pr_err("atm_proc_init() failed with %d\n", error); 798 goto out_atmsvc_exit; 799 } 800 error = atm_sysfs_init(); 801 if (error < 0) { 802 pr_err("atm_sysfs_init() failed with %d\n", error); 803 goto out_atmproc_exit; 804 } 805 out: 806 return error; 807 out_atmproc_exit: 808 atm_proc_exit(); 809 out_atmsvc_exit: 810 atmsvc_exit(); 811 out_atmpvc_exit: 812 atmsvc_exit(); 813 out_unregister_vcc_proto: 814 proto_unregister(&vcc_proto); 815 goto out; 816 } 817 818 static void __exit atm_exit(void) 819 { 820 atm_proc_exit(); 821 atm_sysfs_exit(); 822 atmsvc_exit(); 823 atmpvc_exit(); 824 proto_unregister(&vcc_proto); 825 } 826 827 subsys_initcall(atm_init); 828 829 module_exit(atm_exit); 830 831 MODULE_LICENSE("GPL"); 832 MODULE_ALIAS_NETPROTO(PF_ATMPVC); 833 MODULE_ALIAS_NETPROTO(PF_ATMSVC); 834