kernel/linux/net/atm/common.c

   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 rwlock_t vcc_sklist_lock = RW_LOCK_UNLOCKED;
  43
  44 #if defined(CONFIG_MIPS_BRCM) && defined(CONFIG_BCM_VDSL)
  45 int g_nPtmTraffic = 0;
  46 EXPORT_SYMBOL(g_nPtmTraffic);
  47 #endif
  48
  49 void __vcc_insert_socket(struct sock *sk)
  50 {
  51         struct atm_vcc *vcc = atm_sk(sk);
  52         struct hlist_head *head = &vcc_hash[vcc->vci &
  53                                         (VCC_HTABLE_SIZE - 1)];
  54         sk->sk_hashent = vcc->vci & (VCC_HTABLE_SIZE - 1);
  55         sk_add_node(sk, head);
  56 }
  57
  58 void vcc_insert_socket(struct sock *sk)
  59 {
  60         write_lock_irq(&vcc_sklist_lock);
  61         __vcc_insert_socket(sk);
  62         write_unlock_irq(&vcc_sklist_lock);
  63 }
  64
  65 void vcc_remove_socket(struct sock *sk)
  66 {
  67         write_lock_irq(&vcc_sklist_lock);
  68         sk_del_node_init(sk);
  69         write_unlock_irq(&vcc_sklist_lock);
  70 }
  71
  72
  73 static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size)
  74 {
  75         struct sk_buff *skb;
  76
  77         if (atomic_read(&vcc->sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) {
  78                 DPRINTK("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n",
  79                         atomic_read(&vcc->sk->sk_wmem_alloc), size,
  80                         vcc->sk->sk_sndbuf);
  81                 return NULL;
  82         }
  83         while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule();
  84         DPRINTK("AlTx %d += %d\n", atomic_read(&vcc->sk->sk_wmem_alloc),
  85                 skb->truesize);
  86         atomic_add(skb->truesize, &vcc->sk->sk_wmem_alloc);
  87         return skb;
  88 }
  89
  90
  91 EXPORT_SYMBOL(vcc_hash);
  92 EXPORT_SYMBOL(vcc_sklist_lock);
  93 EXPORT_SYMBOL(vcc_insert_socket);
  94 EXPORT_SYMBOL(vcc_remove_socket);
  95
  96 static void vcc_sock_destruct(struct sock *sk)
  97 {
  98         struct atm_vcc *vcc = atm_sk(sk);
  99
 100         if (atomic_read(&vcc->sk->sk_rmem_alloc))
 101                 printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc));
 102
 103         if (atomic_read(&vcc->sk->sk_wmem_alloc))
 104                 printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc));
 105
 106         kfree(sk->sk_protinfo);
 107 }
 108
 109 static void vcc_def_wakeup(struct sock *sk)
 110 {
 111         read_lock(&sk->sk_callback_lock);
 112         if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
 113                 wake_up(sk->sk_sleep);
 114         read_unlock(&sk->sk_callback_lock);
 115 }
 116
 117 static inline int vcc_writable(struct sock *sk)
 118 {
 119         struct atm_vcc *vcc = atm_sk(sk);
 120
 121         return (vcc->qos.txtp.max_sdu +
 122                 atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf;
 123 }
 124
 125 static void vcc_write_space(struct sock *sk)
 126 {
 127         read_lock(&sk->sk_callback_lock);
 128
 129         if (vcc_writable(sk)) {
 130                 if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
 131                         wake_up_interruptible(sk->sk_sleep);
 132
 133                 sk_wake_async(sk, 2, POLL_OUT);
 134         }
 135
 136         read_unlock(&sk->sk_callback_lock);
 137 }
 138
 139
 140 int vcc_create(struct socket *sock, int protocol, int family)
 141 {
 142         struct sock *sk;
 143         struct atm_vcc *vcc;
 144
 145         sock->sk = NULL;
 146         if (sock->type == SOCK_STREAM)
 147                 return -EINVAL;
 148         sk = sk_alloc(family, GFP_KERNEL, 1, NULL);
 149         if (!sk)
 150                 return -ENOMEM;
 151         sock_init_data(sock, sk);
 152         sk_set_owner(sk, THIS_MODULE);
 153         sk->sk_state_change = vcc_def_wakeup;
 154         sk->sk_write_space = vcc_write_space;
 155
 156         vcc = sk->sk_protinfo = kmalloc(sizeof(*vcc), GFP_KERNEL);
 157         if (!vcc) {
 158                 sk_free(sk);
 159                 return -ENOMEM;
 160         }
 161
 162         memset(vcc, 0, sizeof(*vcc));
 163         vcc->sk = sk;
 164         vcc->dev = NULL;
 165         memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc));
 166         memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc));
 167         vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */
 168         atomic_set(&vcc->sk->sk_wmem_alloc, 0);
 169         atomic_set(&vcc->sk->sk_rmem_alloc, 0);
 170         vcc->push = NULL;
 171         vcc->pop = NULL;
 172         vcc->push_oam = NULL;
 173         vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */
 174         vcc->atm_options = vcc->aal_options = 0;
 175         sk->sk_destruct = vcc_sock_destruct;
 176         sock->sk = sk;
 177         return 0;
 178 }
 179
 180
 181 static void vcc_destroy_socket(struct sock *sk)
 182 {
 183         struct atm_vcc *vcc = atm_sk(sk);
 184         struct sk_buff *skb;
 185
 186         clear_bit(ATM_VF_READY, &vcc->flags);
 187         if (vcc->dev) {
 188                 if (vcc->dev->ops->close)
 189                         vcc->dev->ops->close(vcc);
 190                 if (vcc->push)
 191                         vcc->push(vcc, NULL); /* atmarpd has no push */
 192
 193                 vcc_remove_socket(sk);  /* no more receive */
 194
 195                 while ((skb = skb_dequeue(&vcc->sk->sk_receive_queue)) != NULL) {
 196                         atm_return(vcc,skb->truesize);
 197                         kfree_skb(skb);
 198                 }
 199
 200                 module_put(vcc->dev->ops->owner);
 201                 atm_dev_put(vcc->dev);
 202         }
 203 }
 204
 205
 206 int vcc_release(struct socket *sock)
 207 {
 208         struct sock *sk = sock->sk;
 209
 210         if (sk) {
 211                 lock_sock(sk);
 212                 vcc_destroy_socket(sock->sk);
 213                 release_sock(sk);
 214                 sock_put(sk);
 215         }
 216
 217         return 0;
 218 }
 219
 220
 221 void vcc_release_async(struct atm_vcc *vcc, int reply)
 222 {
 223         set_bit(ATM_VF_CLOSE, &vcc->flags);
 224         vcc->sk->sk_err = -reply;
 225         clear_bit(ATM_VF_WAITING, &vcc->flags);
 226         vcc->sk->sk_state_change(vcc->sk);
 227 }
 228
 229
 230 EXPORT_SYMBOL(vcc_release_async);
 231
 232
 233 static int adjust_tp(struct atm_trafprm *tp,unsigned char aal)
 234 {
 235         int max_sdu;
 236
 237         if (!tp->traffic_class) 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                         printk(KERN_WARNING "ATM: AAL problems ... "
 247                             "(%d)\n",aal);
 248                         /* fall through */
 249                 case ATM_AAL5:
 250 #if defined(CONFIG_MIPS_BRCM)
 251                         /* Use a big max sdu within Linux.  It will be verified by the
 252                          * Broadcom ATM driver.
 253                          */
 254                 case ATM_AAL2:
 255                 case ATM_BCM_AAL0:
 256 #endif
 257                         max_sdu = ATM_MAX_AAL5_PDU;
 258         }
 259         if (!tp->max_sdu) tp->max_sdu = max_sdu;
 260         else if (tp->max_sdu > max_sdu) return -EINVAL;
 261         if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV;
 262         return 0;
 263 }
 264
 265
 266 static int check_ci(struct atm_vcc *vcc, short vpi, int vci)
 267 {
 268         struct hlist_head *head = &vcc_hash[vci &
 269                                         (VCC_HTABLE_SIZE - 1)];
 270         struct hlist_node *node;
 271         struct sock *s;
 272         struct atm_vcc *walk;
 273
 274         sk_for_each(s, node, head) {
 275                 walk = atm_sk(s);
 276                 if (walk->dev != vcc->dev)
 277                         continue;
 278                 if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi &&
 279                     walk->vci == vci && ((walk->qos.txtp.traffic_class !=
 280                     ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) ||
 281                     (walk->qos.rxtp.traffic_class != ATM_NONE &&
 282                     vcc->qos.rxtp.traffic_class != ATM_NONE)))
 283                         return -EADDRINUSE;
 284         }
 285
 286         /* allow VCCs with same VPI/VCI iff they don't collide on
 287            TX/RX (but we may refuse such sharing for other reasons,
 288            e.g. if protocol requires to have both channels) */
 289
 290         return 0;
 291 }
 292
 293
 294 static int find_ci(struct atm_vcc *vcc, short *vpi, int *vci)
 295 {
 296         static short p;        /* poor man's per-device cache */
 297         static int c;
 298         short old_p;
 299         int old_c;
 300         int err;
 301
 302         if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) {
 303                 err = check_ci(vcc, *vpi, *vci);
 304                 return err;
 305         }
 306         /* last scan may have left values out of bounds for current device */
 307         if (*vpi != ATM_VPI_ANY)
 308                 p = *vpi;
 309         else if (p >= 1 << vcc->dev->ci_range.vpi_bits)
 310                 p = 0;
 311         if (*vci != ATM_VCI_ANY)
 312                 c = *vci;
 313         else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits)
 314                         c = ATM_NOT_RSV_VCI;
 315         old_p = p;
 316         old_c = c;
 317         do {
 318                 if (!check_ci(vcc, p, c)) {
 319                         *vpi = p;
 320                         *vci = c;
 321                         return 0;
 322                 }
 323                 if (*vci == ATM_VCI_ANY) {
 324                         c++;
 325                         if (c >= 1 << vcc->dev->ci_range.vci_bits)
 326                                 c = ATM_NOT_RSV_VCI;
 327                 }
 328                 if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) &&
 329                     *vpi == ATM_VPI_ANY) {
 330                         p++;
 331                         if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0;
 332                 }
 333         }
 334         while (old_p != p || old_c != c);
 335         return -EADDRINUSE;
 336 }
 337
 338
 339 static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
 340                          int vci)
 341 {
 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 = 0;
 351         if (!try_module_get(dev->ops->owner))
 352                 return -ENODEV;
 353         vcc->dev = dev;
 354         write_lock_irq(&vcc_sklist_lock);
 355         if ((error = find_ci(vcc, &vpi, &vci))) {
 356                 write_unlock_irq(&vcc_sklist_lock);
 357                 goto fail_module_put;
 358         }
 359         vcc->vpi = vpi;
 360         vcc->vci = vci;
 361         __vcc_insert_socket(vcc->sk);
 362         write_unlock_irq(&vcc_sklist_lock);
 363         switch (vcc->qos.aal) {
 364                 case ATM_AAL0:
 365                         error = atm_init_aal0(vcc);
 366                         vcc->stats = &dev->stats.aal0;
 367                         break;
 368                 case ATM_AAL34:
 369                         error = atm_init_aal34(vcc);
 370                         vcc->stats = &dev->stats.aal34;
 371                         break;
 372                 case ATM_NO_AAL:
 373                         /* ATM_AAL5 is also used in the "0 for default" case */
 374                         vcc->qos.aal = ATM_AAL5;
 375                         /* fall through */
 376                 case ATM_AAL5:
 377 #if defined(CONFIG_MIPS_BRCM)
 378                         /* All aal types must call atm_init_aal5 so that send packets go to
 379                          * the Broadcom blaa driver.
 380                          */
 381                 case ATM_AAL2:
 382                 case ATM_BCM_AAL0:
 383 #endif
 384                         error = atm_init_aal5(vcc);
 385                         vcc->stats = &dev->stats.aal5;
 386                         break;
 387                 default:
 388                         error = -EPROTOTYPE;
 389         }
 390         if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal);
 391         if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal);
 392         if (error)
 393                 goto fail;
 394         DPRINTK("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal);
 395         DPRINTK("  TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class,
 396             vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu);
 397         DPRINTK("  RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class,
 398             vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu);
 399
 400         if (dev->ops->open) {
 401                 if ((error = dev->ops->open(vcc)))
 402                         goto fail;
 403         }
 404         return 0;
 405
 406 fail:
 407         vcc_remove_socket(vcc->sk);
 408 fail_module_put:
 409         module_put(dev->ops->owner);
 410         /* ensure we get dev module ref count correct */
 411         vcc->dev = NULL;
 412         return error;
 413 }
 414
 415
 416 int vcc_connect(struct socket *sock, int itf, short vpi, int vci)
 417 {
 418         struct atm_dev *dev;
 419         struct atm_vcc *vcc = ATM_SD(sock);
 420         int error;
 421
 422         DPRINTK("vcc_connect (vpi %d, vci %d)\n",vpi,vci);
 423         if (sock->state == SS_CONNECTED)
 424                 return -EISCONN;
 425         if (sock->state != SS_UNCONNECTED)
 426                 return -EINVAL;
 427         if (!(vpi || vci))
 428                 return -EINVAL;
 429
 430         if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC)
 431                 clear_bit(ATM_VF_PARTIAL,&vcc->flags);
 432         else
 433                 if (test_bit(ATM_VF_PARTIAL,&vcc->flags))
 434                         return -EINVAL;
 435 #if defined(CONFIG_MIPS_BRCM)
 436         DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; "
 437             "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
 438             vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr,
 439             vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu,
 440             vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr,
 441             vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
 442             vcc->qos.aal == ATM_AAL5 ? "" : (vcc->qos.aal == ATM_AAL0 ||
 443             vcc->qos.aal == ATM_BCM_AAL0) ? "" : " ??? code ",
 444                 (vcc->qos.aal == ATM_AAL0 || vcc->qos.aal == ATM_BCM_AAL0) ? 0
 445             : vcc->qos.aal);
 446 #else
 447         DPRINTK("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; "
 448             "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n",
 449             vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr,
 450             vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu,
 451             vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr,
 452             vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu,
 453             vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" :
 454             " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal);
 455 #endif
 456         if (!test_bit(ATM_VF_HASQOS, &vcc->flags))
 457                 return -EBADFD;
 458         if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
 459             vcc->qos.rxtp.traffic_class == ATM_ANYCLASS)
 460                 return -EINVAL;
 461         if (itf != ATM_ITF_ANY) {
 462                 dev = atm_dev_lookup(itf);
 463                 if (!dev)
 464                         return -ENODEV;
 465                 error = __vcc_connect(vcc, dev, vpi, vci);
 466                 if (error) {
 467                         atm_dev_put(dev);
 468                         return error;
 469                 }
 470         } else {
 471                 struct list_head *p, *next;
 472
 473                 dev = NULL;
 474                 spin_lock(&atm_dev_lock);
 475                 list_for_each_safe(p, next, &atm_devs) {
 476                         dev = list_entry(p, struct atm_dev, dev_list);
 477                         atm_dev_hold(dev);
 478                         spin_unlock(&atm_dev_lock);
 479                         if (!__vcc_connect(vcc, dev, vpi, vci))
 480                                 break;
 481                         atm_dev_put(dev);
 482                         dev = NULL;
 483                         spin_lock(&atm_dev_lock);
 484                 }
 485                 spin_unlock(&atm_dev_lock);
 486                 if (!dev)
 487                         return -ENODEV;
 488         }
 489         if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC)
 490                 set_bit(ATM_VF_PARTIAL,&vcc->flags);
 491         if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags))
 492                 sock->state = SS_CONNECTED;
 493         return 0;
 494 }
 495
 496
 497 int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
 498                 size_t size, int flags)
 499 {
 500         struct sock *sk = sock->sk;
 501         struct atm_vcc *vcc;
 502         struct sk_buff *skb;
 503         int copied, error = -EINVAL;
 504
 505         if (sock->state != SS_CONNECTED)
 506                 return -ENOTCONN;
 507         if (flags & ~MSG_DONTWAIT)              /* only handle MSG_DONTWAIT */
 508                 return -EOPNOTSUPP;
 509         vcc = ATM_SD(sock);
 510         if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
 511             test_bit(ATM_VF_CLOSE,&vcc->flags) ||
 512             !test_bit(ATM_VF_READY, &vcc->flags))
 513                 return 0;
 514
 515         skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error);
 516         if (!skb)
 517                 return error;
 518
 519         copied = skb->len;
 520         if (copied > size) {
 521                 copied = size;
 522                 msg->msg_flags |= MSG_TRUNC;
 523         }
 524
 525         error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
 526         if (error)
 527                 return error;
 528         sock_recv_timestamp(msg, sk, skb);
 529         DPRINTK("RcvM %d -= %d\n", atomic_read(&vcc->sk->rmem_alloc), skb->truesize);
 530         atm_return(vcc, skb->truesize);
 531         skb_free_datagram(sk, skb);
 532         return copied;
 533 }
 534
 535
 536 int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m,
 537                 size_t total_len)
 538 {
 539         struct sock *sk = sock->sk;
 540         DEFINE_WAIT(wait);
 541         struct atm_vcc *vcc;
 542         struct sk_buff *skb;
 543         int eff,error;
 544         const void __user *buff;
 545         int size;
 546
 547         lock_sock(sk);
 548         if (sock->state != SS_CONNECTED) {
 549                 error = -ENOTCONN;
 550                 goto out;
 551         }
 552         if (m->msg_name) {
 553                 error = -EISCONN;
 554                 goto out;
 555         }
 556         if (m->msg_iovlen != 1) {
 557                 error = -ENOSYS; /* fix this later @@@ */
 558                 goto out;
 559         }
 560         buff = m->msg_iov->iov_base;
 561         size = m->msg_iov->iov_len;
 562         vcc = ATM_SD(sock);
 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                 goto out;
 569         }
 570         if (!size) {
 571                 error = 0;
 572                 goto out;
 573         }
 574         if (size < 0 || size > vcc->qos.txtp.max_sdu) {
 575                 error = -EMSGSIZE;
 576                 goto out;
 577         }
 578         /* verify_area is done by net/socket.c */
 579         eff = (size+3) & ~3; /* align to word boundary */
 580         prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 581         error = 0;
 582         while (!(skb = alloc_tx(vcc,eff))) {
 583                 if (m->msg_flags & MSG_DONTWAIT) {
 584                         error = -EAGAIN;
 585                         break;
 586                 }
 587                 schedule();
 588                 if (signal_pending(current)) {
 589                         error = -ERESTARTSYS;
 590                         break;
 591                 }
 592                 if (test_bit(ATM_VF_RELEASED,&vcc->flags) ||
 593                     test_bit(ATM_VF_CLOSE,&vcc->flags) ||
 594                     !test_bit(ATM_VF_READY,&vcc->flags)) {
 595                         error = -EPIPE;
 596                         send_sig(SIGPIPE, current, 0);
 597                         break;
 598                 }
 599                 prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
 600         }
 601         finish_wait(sk->sk_sleep, &wait);
 602         if (error)
 603                 goto out;
 604         skb->dev = NULL; /* for paths shared with net_device interfaces */
 605         ATM_SKB(skb)->atm_options = vcc->atm_options;
 606         if (copy_from_user(skb_put(skb,size),buff,size)) {
 607                 kfree_skb(skb);
 608                 error = -EFAULT;
 609                 goto out;
 610         }
 611         if (eff != size) memset(skb->data+size,0,eff-size);
 612         error = vcc->dev->ops->send(vcc,skb);
 613         error = error ? error : size;
 614 out:
 615         release_sock(sk);
 616         return error;
 617 }
 618
 619
 620 unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait)
 621 {
 622         struct sock *sk = sock->sk;
 623         struct atm_vcc *vcc;
 624         unsigned int mask;
 625
 626         poll_wait(file, sk->sk_sleep, wait);
 627         mask = 0;
 628
 629         vcc = ATM_SD(sock);
 630
 631         /* exceptional events */
 632         if (sk->sk_err)
 633                 mask = POLLERR;
 634
 635         if (test_bit(ATM_VF_RELEASED, &vcc->flags) ||
 636             test_bit(ATM_VF_CLOSE, &vcc->flags))
 637                 mask |= POLLHUP;
 638
 639         /* readable? */
 640         if (!skb_queue_empty(&sk->sk_receive_queue))
 641                 mask |= POLLIN | POLLRDNORM;
 642
 643         /* writable? */
 644         if (sock->state == SS_CONNECTING &&
 645             test_bit(ATM_VF_WAITING, &vcc->flags))
 646                 return mask;
 647
 648         if (vcc->qos.txtp.traffic_class != ATM_NONE &&
 649             vcc_writable(vcc->sk))
 650                 mask |= POLLOUT | POLLWRNORM | POLLWRBAND;
 651
 652         return mask;
 653 }
 654
 655
 656 static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
 657 {
 658         int error;
 659
 660         /*
 661          * Don't let the QoS change the already connected AAL type nor the
 662          * traffic class.
 663          */
 664         if (qos->aal != vcc->qos.aal ||
 665             qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class ||
 666             qos->txtp.traffic_class != vcc->qos.txtp.traffic_class)
 667                 return -EINVAL;
 668         error = adjust_tp(&qos->txtp,qos->aal);
 669         if (!error) error = adjust_tp(&qos->rxtp,qos->aal);
 670         if (error) return error;
 671         if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP;
 672         if (vcc->sk->sk_family == AF_ATMPVC)
 673                 return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET);
 674         return svc_change_qos(vcc,qos);
 675 }
 676
 677
 678 static int check_tp(struct atm_trafprm *tp)
 679 {
 680         /* @@@ Should be merged with adjust_tp */
 681         if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0;
 682         if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr &&
 683             !tp->max_pcr) return -EINVAL;
 684         if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL;
 685         if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR &&
 686             tp->min_pcr > tp->max_pcr) return -EINVAL;
 687         /*
 688          * We allow pcr to be outside [min_pcr,max_pcr], because later
 689          * adjustment may still push it in the valid range.
 690          */
 691         return 0;
 692 }
 693
 694
 695 static int check_qos(struct atm_qos *qos)
 696 {
 697         int error;
 698
 699         if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class)
 700                 return -EINVAL;
 701         if (qos->txtp.traffic_class != qos->rxtp.traffic_class &&
 702             qos->txtp.traffic_class && qos->rxtp.traffic_class &&
 703             qos->txtp.traffic_class != ATM_ANYCLASS &&
 704             qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL;
 705         error = check_tp(&qos->txtp);
 706         if (error) return error;
 707         return check_tp(&qos->rxtp);
 708 }
 709
 710 int vcc_setsockopt(struct socket *sock, int level, int optname,
 711                    char __user *optval, int optlen)
 712 {
 713         struct atm_vcc *vcc;
 714         unsigned long value;
 715         int error;
 716
 717         if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname))
 718                 return -EINVAL;
 719
 720         vcc = ATM_SD(sock);
 721         switch (optname) {
 722                 case SO_ATMQOS:
 723                         {
 724                                 struct atm_qos qos;
 725
 726                                 if (copy_from_user(&qos,optval,sizeof(qos)))
 727                                         return -EFAULT;
 728                                 error = check_qos(&qos);
 729                                 if (error) return error;
 730                                 if (sock->state == SS_CONNECTED)
 731                                         return atm_change_qos(vcc,&qos);
 732                                 if (sock->state != SS_UNCONNECTED)
 733                                         return -EBADFD;
 734                                 vcc->qos = qos;
 735                                 set_bit(ATM_VF_HASQOS,&vcc->flags);
 736                                 return 0;
 737                         }
 738                 case SO_SETCLP:
 739                         if (get_user(value,(unsigned long __user *)optval))
 740                                 return -EFAULT;
 741                         if (value) vcc->atm_options |= ATM_ATMOPT_CLP;
 742                         else vcc->atm_options &= ~ATM_ATMOPT_CLP;
 743                         return 0;
 744                 default:
 745                         if (level == SOL_SOCKET) return -EINVAL;
 746                         break;
 747         }
 748         if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL;
 749         return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen);
 750 }
 751
 752
 753 int vcc_getsockopt(struct socket *sock, int level, int optname,
 754                    char __user *optval, int __user *optlen)
 755 {
 756         struct atm_vcc *vcc;
 757         int len;
 758
 759         if (get_user(len, optlen))
 760                 return -EFAULT;
 761         if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname))
 762                 return -EINVAL;
 763
 764         vcc = ATM_SD(sock);
 765         switch (optname) {
 766                 case SO_ATMQOS:
 767                         if (!test_bit(ATM_VF_HASQOS,&vcc->flags))
 768                                 return -EINVAL;
 769                         return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ?
 770                             -EFAULT : 0;
 771                 case SO_SETCLP:
 772                         return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 :
 773                           0,(unsigned long __user *)optval) ? -EFAULT : 0;
 774                 case SO_ATMPVC:
 775                         {
 776                                 struct sockaddr_atmpvc pvc;
 777
 778                                 if (!vcc->dev ||
 779                                     !test_bit(ATM_VF_ADDR,&vcc->flags))
 780                                         return -ENOTCONN;
 781                                 pvc.sap_family = AF_ATMPVC;
 782                                 pvc.sap_addr.itf = vcc->dev->number;
 783                                 pvc.sap_addr.vpi = vcc->vpi;
 784                                 pvc.sap_addr.vci = vcc->vci;
 785                                 return copy_to_user(optval,&pvc,sizeof(pvc)) ?
 786                                     -EFAULT : 0;
 787                         }
 788                 default:
 789                         if (level == SOL_SOCKET) return -EINVAL;
 790                         break;
 791         }
 792         if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL;
 793         return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
 794 }
 795
 796
 797 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
 798 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 799 struct net_bridge;
 800 struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
 801                                                 unsigned char *addr) = NULL;
 802 void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent) = NULL;
 803 #if defined(CONFIG_ATM_LANE_MODULE) || defined(CONFIG_BRIDGE_MODULE)
 804 EXPORT_SYMBOL(br_fdb_get_hook);
 805 EXPORT_SYMBOL(br_fdb_put_hook);
 806 #endif /* defined(CONFIG_ATM_LANE_MODULE) || defined(CONFIG_BRIDGE_MODULE) */
 807 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 808 #endif /* defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) */
 809
 810
 811 static int __init atm_init(void)
 812 {
 813         int error;
 814
 815         if ((error = atmpvc_init()) < 0) {
 816                 printk(KERN_ERR "atmpvc_init() failed with %d\n", error);
 817                 goto failure;
 818         }
 819         if ((error = atmsvc_init()) < 0) {
 820                 printk(KERN_ERR "atmsvc_init() failed with %d\n", error);
 821                 goto failure;
 822         }
 823         if ((error = atm_proc_init()) < 0) {
 824                 printk(KERN_ERR "atm_proc_init() failed with %d\n",error);
 825                 goto failure;
 826         }
 827         return 0;
 828
 829 failure:
 830         atmsvc_exit();
 831         atmpvc_exit();
 832         return error;
 833 }
 834
 835 static void __exit atm_exit(void)
 836 {
 837         atm_proc_exit();
 838         atmsvc_exit();
 839         atmpvc_exit();
 840 }
 841
 842 module_init(atm_init);
 843 module_exit(atm_exit);
 844
 845 MODULE_LICENSE("GPL");
 846 MODULE_ALIAS_NETPROTO(PF_ATMPVC);
 847 MODULE_ALIAS_NETPROTO(PF_ATMSVC);