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 34#define DPRINTK(format,args...) 35 36struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; 37DEFINE_RWLOCK(vcc_sklist_lock); 38 39static void __vcc_insert_socket(struct sock *sk) 40{ 41 struct atm_vcc *vcc = atm_sk(sk); 42 struct hlist_head *head = &vcc_hash[vcc->vci & 43 (VCC_HTABLE_SIZE - 1)]; 44 sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); 45 sk_add_node(sk, head); 46} 47 48void 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 55static 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 62 63static 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 (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) { 69 DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", 70 atomic_read(&sk->sk_wmem_alloc), size, 71 sk->sk_sndbuf); 72 return NULL; 73 } 74 while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule(); 75 DPRINTK("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc), 76 skb->truesize); 77 atomic_add(skb->truesize, &sk->sk_wmem_alloc); 78 return skb; 79} 80 81 82EXPORT_SYMBOL(vcc_hash); 83EXPORT_SYMBOL(vcc_sklist_lock); 84EXPORT_SYMBOL(vcc_insert_socket); 85 86static void vcc_sock_destruct(struct sock *sk) 87{ 88 if (atomic_read(&sk->sk_rmem_alloc)) 89 printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc)); 90 91 if (atomic_read(&sk->sk_wmem_alloc)) 92 printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc)); 93} 94 95static void vcc_def_wakeup(struct sock *sk) 96{ 97 read_lock(&sk->sk_callback_lock); 98 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) 99 wake_up(sk->sk_sleep); 100 read_unlock(&sk->sk_callback_lock); 101} 102 103static inline int vcc_writable(struct sock *sk) 104{ 105 struct atm_vcc *vcc = atm_sk(sk); 106 107 return (vcc->qos.txtp.max_sdu + 108 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; 109} 110 111static void vcc_write_space(struct sock *sk) 112{ 113 read_lock(&sk->sk_callback_lock); 114 115 if (vcc_writable(sk)) { 116 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) 117 wake_up_interruptible(sk->sk_sleep); 118 119 sk_wake_async(sk, 2, POLL_OUT); 120 } 121 122 read_unlock(&sk->sk_callback_lock); 123} 124 125static struct proto vcc_proto = { 126 .name = "VCC", 127 .owner = THIS_MODULE, 128 .obj_size = sizeof(struct atm_vcc), 129}; 130 131int vcc_create(struct socket *sock, int protocol, int family) 132{ 133 struct sock *sk; 134 struct atm_vcc *vcc; 135 136 sock->sk = NULL; 137 if (sock->type == SOCK_STREAM) 138 return -EINVAL; 139 sk = sk_alloc(family, GFP_KERNEL, &vcc_proto, 1); 140 if (!sk) 141 return -ENOMEM; 142 sock_init_data(sock, sk); 143 sk->sk_state_change = vcc_def_wakeup; 144 sk->sk_write_space = vcc_write_space; 145 146 vcc = atm_sk(sk); 147 vcc->dev = NULL; 148 memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc)); 149 memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc)); 150 vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ 151 atomic_set(&sk->sk_wmem_alloc, 0); 152 atomic_set(&sk->sk_rmem_alloc, 0); 153 vcc->push = NULL; 154 vcc->pop = NULL; 155 vcc->push_oam = NULL; 156 vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ 157 vcc->atm_options = vcc->aal_options = 0; 158 sk->sk_destruct = vcc_sock_destruct; 159 return 0; 160} 161 162 163static void vcc_destroy_socket(struct sock *sk) 164{ 165 struct atm_vcc *vcc = atm_sk(sk); 166 struct sk_buff *skb; 167 168 set_bit(ATM_VF_CLOSE, &vcc->flags); 169 clear_bit(ATM_VF_READY, &vcc->flags); 170 if (vcc->dev) { 171 if (vcc->dev->ops->close) 172 vcc->dev->ops->close(vcc); 173 if (vcc->push) 174 vcc->push(vcc, NULL); /* atmarpd has no push */ 175 176 while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { 177 atm_return(vcc,skb->truesize); 178 kfree_skb(skb); 179 } 180 181 module_put(vcc->dev->ops->owner); 182 atm_dev_put(vcc->dev); 183 } 184 185 vcc_remove_socket(sk); 186} 187 188 189int vcc_release(struct socket *sock) 190{ 191 struct sock *sk = sock->sk; 192 193 if (sk) { 194 lock_sock(sk); 195 vcc_destroy_socket(sock->sk); 196 release_sock(sk); 197 sock_put(sk); 198 } 199 200 return 0; 201} 202 203 204void vcc_release_async(struct atm_vcc *vcc, int reply) 205{ 206 struct sock *sk = sk_atm(vcc); 207 208 set_bit(ATM_VF_CLOSE, &vcc->flags); 209 sk->sk_shutdown |= RCV_SHUTDOWN; 210 sk->sk_err = -reply; 211 clear_bit(ATM_VF_WAITING, &vcc->flags); 212 sk->sk_state_change(sk); 213} 214 215 216EXPORT_SYMBOL(vcc_release_async); 217 218 219void atm_dev_release_vccs(struct atm_dev *dev) 220{ 221 int i; 222 223 write_lock_irq(&vcc_sklist_lock); 224 for (i = 0; i < VCC_HTABLE_SIZE; i++) { 225 struct hlist_head *head = &vcc_hash[i]; 226 struct hlist_node *node, *tmp; 227 struct sock *s; 228 struct atm_vcc *vcc; 229 230 sk_for_each_safe(s, node, tmp, head) { 231 vcc = atm_sk(s); 232 if (vcc->dev == dev) { 233 vcc_release_async(vcc, -EPIPE); 234 sk_del_node_init(s); 235 } 236 } 237 } 238 write_unlock_irq(&vcc_sklist_lock); 239} 240 241 242static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) 243{ 244 int max_sdu; 245 246 if (!tp->traffic_class) return 0; 247 switch (aal) { 248 case ATM_AAL0: 249 max_sdu = ATM_CELL_SIZE-1; 250 break; 251 case ATM_AAL34: 252 max_sdu = ATM_MAX_AAL34_PDU; 253 break; 254 default: 255 printk(KERN_WARNING "ATM: AAL problems ... " 256 "(%d)\n",aal); 257 /* fall through */ 258 case ATM_AAL5: 259 max_sdu = ATM_MAX_AAL5_PDU; 260 } 261 if (!tp->max_sdu) tp->max_sdu = max_sdu; 262 else if (tp->max_sdu > max_sdu) return -EINVAL; 263 if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV; 264 return 0; 265} 266 267 268static int check_ci(struct atm_vcc *vcc, short vpi, int vci) 269{ 270 struct hlist_head *head = &vcc_hash[vci & 271 (VCC_HTABLE_SIZE - 1)]; 272 struct hlist_node *node; 273 struct sock *s; 274 struct atm_vcc *walk; 275 276 sk_for_each(s, node, head) { 277 walk = atm_sk(s); 278 if (walk->dev != vcc->dev) 279 continue; 280 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && 281 walk->vci == vci && ((walk->qos.txtp.traffic_class != 282 ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || 283 (walk->qos.rxtp.traffic_class != ATM_NONE && 284 vcc->qos.rxtp.traffic_class != ATM_NONE))) 285 return -EADDRINUSE; 286 } 287 288 /* allow VCCs with same VPI/VCI iff they don't collide on 289 TX/RX (but we may refuse such sharing for other reasons, 290 e.g. if protocol requires to have both channels) */ 291 292 return 0; 293} 294 295 296static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci) 297{ 298 static short p; /* poor man's per-device cache */ 299 static int c; 300 short old_p; 301 int old_c; 302 int err; 303 304 if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { 305 err = check_ci(vcc, *vpi, *vci); 306 return err; 307 } 308 /* last scan may have left values out of bounds for current device */ 309 if (*vpi != ATM_VPI_ANY) 310 p = *vpi; 311 else if (p >= 1 << vcc->dev->ci_range.vpi_bits) 312 p = 0; 313 if (*vci != ATM_VCI_ANY) 314 c = *vci; 315 else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) 316 c = ATM_NOT_RSV_VCI; 317 old_p = p; 318 old_c = c; 319 do { 320 if (!check_ci(vcc, p, c)) { 321 *vpi = p; 322 *vci = c; 323 return 0; 324 } 325 if (*vci == ATM_VCI_ANY) { 326 c++; 327 if (c >= 1 << vcc->dev->ci_range.vci_bits) 328 c = ATM_NOT_RSV_VCI; 329 } 330 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && 331 *vpi == ATM_VPI_ANY) { 332 p++; 333 if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0; 334 } 335 } 336 while (old_p != p || old_c != c); 337 return -EADDRINUSE; 338} 339 340 341static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, 342 int vci) 343{ 344 struct sock *sk = sk_atm(vcc); 345 int error; 346 347 if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && 348 vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && 349 vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) 350 return -EINVAL; 351 if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) 352 return -EPERM; 353 error = -ENODEV; 354 if (!try_module_get(dev->ops->owner)) 355 return error; 356 vcc->dev = dev; 357 write_lock_irq(&vcc_sklist_lock); 358 if (test_bit(ATM_DF_REMOVED, &dev->flags) || 359 (error = find_ci(vcc, &vpi, &vci))) { 360 write_unlock_irq(&vcc_sklist_lock); 361 goto fail_module_put; 362 } 363 vcc->vpi = vpi; 364 vcc->vci = vci; 365 __vcc_insert_socket(sk); 366 write_unlock_irq(&vcc_sklist_lock); 367 switch (vcc->qos.aal) { 368 case ATM_AAL0: 369 error = atm_init_aal0(vcc); 370 vcc->stats = &dev->stats.aal0; 371 break; 372 case ATM_AAL34: 373 error = atm_init_aal34(vcc); 374 vcc->stats = &dev->stats.aal34; 375 break; 376 case ATM_NO_AAL: 377 /* ATM_AAL5 is also used in the "0 for default" case */ 378 vcc->qos.aal = ATM_AAL5; 379 /* fall through */ 380 case ATM_AAL5: 381 error = atm_init_aal5(vcc); 382 vcc->stats = &dev->stats.aal5; 383 break; 384 default: 385 error = -EPROTOTYPE; 386 } 387 if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal); 388 if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal); 389 if (error) 390 goto fail; 391 DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); 392 DPRINTK(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class, 393 vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); 394 DPRINTK(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, 395 vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu); 396 397 if (dev->ops->open) { 398 if ((error = dev->ops->open(vcc))) 399 goto fail; 400 } 401 return 0; 402 403fail: 404 vcc_remove_socket(sk); 405fail_module_put: 406 module_put(dev->ops->owner); 407 /* ensure we get dev module ref count correct */ 408 vcc->dev = NULL; 409 return error; 410} 411 412 413int vcc_connect(struct socket *sock, int itf, short vpi, int vci) 414{ 415 struct atm_dev *dev; 416 struct atm_vcc *vcc = ATM_SD(sock); 417 int error; 418 419 DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci); 420 if (sock->state == SS_CONNECTED) 421 return -EISCONN; 422 if (sock->state != SS_UNCONNECTED) 423 return -EINVAL; 424 if (!(vpi || vci)) 425 return -EINVAL; 426 427 if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) 428 clear_bit(ATM_VF_PARTIAL,&vcc->flags); 429 else 430 if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) 431 return -EINVAL; 432 DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " 433 "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", 434 vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr, 435 vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu, 436 vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr, 437 vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu, 438 vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" : 439 " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); 440 if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) 441 return -EBADFD; 442 if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || 443 vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) 444 return -EINVAL; 445 if (likely(itf != ATM_ITF_ANY)) { 446 dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); 447 } else { 448 dev = NULL; 449 mutex_lock(&atm_dev_mutex); 450 if (!list_empty(&atm_devs)) { 451 dev = list_entry(atm_devs.next, 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 471int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, 472 size_t size, int flags) 473{ 474 struct sock *sk = sock->sk; 475 struct atm_vcc *vcc; 476 struct sk_buff *skb; 477 int copied, error = -EINVAL; 478 479 if (sock->state != SS_CONNECTED) 480 return -ENOTCONN; 481 if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ 482 return -EOPNOTSUPP; 483 vcc = ATM_SD(sock); 484 if (test_bit(ATM_VF_RELEASED,&vcc->flags) || 485 test_bit(ATM_VF_CLOSE,&vcc->flags) || 486 !test_bit(ATM_VF_READY, &vcc->flags)) 487 return 0; 488 489 skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); 490 if (!skb) 491 return error; 492 493 copied = skb->len; 494 if (copied > size) { 495 copied = size; 496 msg->msg_flags |= MSG_TRUNC; 497 } 498 499 error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); 500 if (error) 501 return error; 502 sock_recv_timestamp(msg, sk, skb); 503 DPRINTK("RcvM %d -= %d\n", atomic_read(&sk->rmem_alloc), skb->truesize); 504 atm_return(vcc, skb->truesize); 505 skb_free_datagram(sk, skb); 506 return copied; 507} 508 509 510int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, 511 size_t total_len) 512{ 513 struct sock *sk = sock->sk; 514 DEFINE_WAIT(wait); 515 struct atm_vcc *vcc; 516 struct sk_buff *skb; 517 int eff,error; 518 const void __user *buff; 519 int size; 520 521 lock_sock(sk); 522 if (sock->state != SS_CONNECTED) { 523 error = -ENOTCONN; 524 goto out; 525 } 526 if (m->msg_name) { 527 error = -EISCONN; 528 goto out; 529 } 530 if (m->msg_iovlen != 1) { 531 error = -ENOSYS; /* fix this later @@@ */ 532 goto out; 533 } 534 buff = m->msg_iov->iov_base; 535 size = m->msg_iov->iov_len; 536 vcc = ATM_SD(sock); 537 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 538 test_bit(ATM_VF_CLOSE, &vcc->flags) || 539 !test_bit(ATM_VF_READY, &vcc->flags)) { 540 error = -EPIPE; 541 send_sig(SIGPIPE, current, 0); 542 goto out; 543 } 544 if (!size) { 545 error = 0; 546 goto out; 547 } 548 if (size < 0 || size > vcc->qos.txtp.max_sdu) { 549 error = -EMSGSIZE; 550 goto out; 551 } 552 553 eff = (size+3) & ~3; /* align to word boundary */ 554 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 555 error = 0; 556 while (!(skb = alloc_tx(vcc,eff))) { 557 if (m->msg_flags & MSG_DONTWAIT) { 558 error = -EAGAIN; 559 break; 560 } 561 schedule(); 562 if (signal_pending(current)) { 563 error = -ERESTARTSYS; 564 break; 565 } 566 if (test_bit(ATM_VF_RELEASED,&vcc->flags) || 567 test_bit(ATM_VF_CLOSE,&vcc->flags) || 568 !test_bit(ATM_VF_READY,&vcc->flags)) { 569 error = -EPIPE; 570 send_sig(SIGPIPE, current, 0); 571 break; 572 } 573 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); 574 } 575 finish_wait(sk->sk_sleep, &wait); 576 if (error) 577 goto out; 578 skb->dev = NULL; /* for paths shared with net_device interfaces */ 579 ATM_SKB(skb)->atm_options = vcc->atm_options; 580 if (copy_from_user(skb_put(skb,size),buff,size)) { 581 kfree_skb(skb); 582 error = -EFAULT; 583 goto out; 584 } 585 if (eff != size) memset(skb->data+size,0,eff-size); 586 error = vcc->dev->ops->send(vcc,skb); 587 error = error ? error : size; 588out: 589 release_sock(sk); 590 return error; 591} 592 593 594unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) 595{ 596 struct sock *sk = sock->sk; 597 struct atm_vcc *vcc; 598 unsigned int mask; 599 600 poll_wait(file, sk->sk_sleep, wait); 601 mask = 0; 602 603 vcc = ATM_SD(sock); 604 605 /* exceptional events */ 606 if (sk->sk_err) 607 mask = POLLERR; 608 609 if (test_bit(ATM_VF_RELEASED, &vcc->flags) || 610 test_bit(ATM_VF_CLOSE, &vcc->flags)) 611 mask |= POLLHUP; 612 613 /* readable? */ 614 if (!skb_queue_empty(&sk->sk_receive_queue)) 615 mask |= POLLIN | POLLRDNORM; 616 617 /* writable? */ 618 if (sock->state == SS_CONNECTING && 619 test_bit(ATM_VF_WAITING, &vcc->flags)) 620 return mask; 621 622 if (vcc->qos.txtp.traffic_class != ATM_NONE && 623 vcc_writable(sk)) 624 mask |= POLLOUT | POLLWRNORM | POLLWRBAND; 625 626 return mask; 627} 628 629 630static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) 631{ 632 int error; 633 634 /* 635 * Don't let the QoS change the already connected AAL type nor the 636 * traffic class. 637 */ 638 if (qos->aal != vcc->qos.aal || 639 qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || 640 qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) 641 return -EINVAL; 642 error = adjust_tp(&qos->txtp,qos->aal); 643 if (!error) error = adjust_tp(&qos->rxtp,qos->aal); 644 if (error) return error; 645 if (!vcc->dev->ops->change_qos) 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 652static int check_tp(struct atm_trafprm *tp) 653{ 654 /* @@@ Should be merged with adjust_tp */ 655 if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0; 656 if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && 657 !tp->max_pcr) return -EINVAL; 658 if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL; 659 if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && 660 tp->min_pcr > tp->max_pcr) return -EINVAL; 661 /* 662 * We allow pcr to be outside [min_pcr,max_pcr], because later 663 * adjustment may still push it in the valid range. 664 */ 665 return 0; 666} 667 668 669static int check_qos(struct atm_qos *qos) 670{ 671 int error; 672 673 if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) 674 return -EINVAL; 675 if (qos->txtp.traffic_class != qos->rxtp.traffic_class && 676 qos->txtp.traffic_class && qos->rxtp.traffic_class && 677 qos->txtp.traffic_class != ATM_ANYCLASS && 678 qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL; 679 error = check_tp(&qos->txtp); 680 if (error) return error; 681 return check_tp(&qos->rxtp); 682} 683 684int vcc_setsockopt(struct socket *sock, int level, int optname, 685 char __user *optval, int optlen) 686{ 687 struct atm_vcc *vcc; 688 unsigned long value; 689 int error; 690 691 if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) 692 return -EINVAL; 693 694 vcc = ATM_SD(sock); 695 switch (optname) { 696 case SO_ATMQOS: 697 { 698 struct atm_qos qos; 699 700 if (copy_from_user(&qos,optval,sizeof(qos))) 701 return -EFAULT; 702 error = check_qos(&qos); 703 if (error) return error; 704 if (sock->state == SS_CONNECTED) 705 return atm_change_qos(vcc,&qos); 706 if (sock->state != SS_UNCONNECTED) 707 return -EBADFD; 708 vcc->qos = qos; 709 set_bit(ATM_VF_HASQOS,&vcc->flags); 710 return 0; 711 } 712 case SO_SETCLP: 713 if (get_user(value,(unsigned long __user *)optval)) 714 return -EFAULT; 715 if (value) vcc->atm_options |= ATM_ATMOPT_CLP; 716 else vcc->atm_options &= ~ATM_ATMOPT_CLP; 717 return 0; 718 default: 719 if (level == SOL_SOCKET) return -EINVAL; 720 break; 721 } 722 if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL; 723 return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen); 724} 725 726 727int vcc_getsockopt(struct socket *sock, int level, int optname, 728 char __user *optval, int __user *optlen) 729{ 730 struct atm_vcc *vcc; 731 int len; 732 733 if (get_user(len, optlen)) 734 return -EFAULT; 735 if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) 736 return -EINVAL; 737 738 vcc = ATM_SD(sock); 739 switch (optname) { 740 case SO_ATMQOS: 741 if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) 742 return -EINVAL; 743 return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ? 744 -EFAULT : 0; 745 case SO_SETCLP: 746 return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : 747 0,(unsigned long __user *)optval) ? -EFAULT : 0; 748 case SO_ATMPVC: 749 { 750 struct sockaddr_atmpvc pvc; 751 752 if (!vcc->dev || 753 !test_bit(ATM_VF_ADDR,&vcc->flags)) 754 return -ENOTCONN; 755 pvc.sap_family = AF_ATMPVC; 756 pvc.sap_addr.itf = vcc->dev->number; 757 pvc.sap_addr.vpi = vcc->vpi; 758 pvc.sap_addr.vci = vcc->vci; 759 return copy_to_user(optval,&pvc,sizeof(pvc)) ? 760 -EFAULT : 0; 761 } 762 default: 763 if (level == SOL_SOCKET) return -EINVAL; 764 break; 765 } 766 if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL; 767 return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); 768} 769 770static int __init atm_init(void) 771{ 772 int error; 773 774 if ((error = proto_register(&vcc_proto, 0)) < 0) 775 goto out; 776 777 if ((error = atmpvc_init()) < 0) { 778 printk(KERN_ERR "atmpvc_init() failed with %d\n", error); 779 goto out_unregister_vcc_proto; 780 } 781 if ((error = atmsvc_init()) < 0) { 782 printk(KERN_ERR "atmsvc_init() failed with %d\n", error); 783 goto out_atmpvc_exit; 784 } 785 if ((error = atm_proc_init()) < 0) { 786 printk(KERN_ERR "atm_proc_init() failed with %d\n",error); 787 goto out_atmsvc_exit; 788 } 789 if ((error = atm_sysfs_init()) < 0) { 790 printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error); 791 goto out_atmproc_exit; 792 } 793out: 794 return error; 795out_atmproc_exit: 796 atm_proc_exit(); 797out_atmsvc_exit: 798 atmsvc_exit(); 799out_atmpvc_exit: 800 atmsvc_exit(); 801out_unregister_vcc_proto: 802 proto_unregister(&vcc_proto); 803 goto out; 804} 805 806static void __exit atm_exit(void) 807{ 808 atm_proc_exit(); 809 atm_sysfs_exit(); 810 atmsvc_exit(); 811 atmpvc_exit(); 812 proto_unregister(&vcc_proto); 813} 814 815subsys_initcall(atm_init); 816 817module_exit(atm_exit); 818 819MODULE_LICENSE("GPL"); 820MODULE_ALIAS_NETPROTO(PF_ATMPVC); 821MODULE_ALIAS_NETPROTO(PF_ATMSVC); 822