svc.c 16 KB

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  1. /* net/atm/svc.c - ATM SVC sockets */
  2. /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
  3. #include <linux/string.h>
  4. #include <linux/net.h> /* struct socket, struct proto_ops */
  5. #include <linux/errno.h> /* error codes */
  6. #include <linux/kernel.h> /* printk */
  7. #include <linux/skbuff.h>
  8. #include <linux/wait.h>
  9. #include <linux/sched.h> /* jiffies and HZ */
  10. #include <linux/fcntl.h> /* O_NONBLOCK */
  11. #include <linux/init.h>
  12. #include <linux/atm.h> /* ATM stuff */
  13. #include <linux/atmsap.h>
  14. #include <linux/atmsvc.h>
  15. #include <linux/atmdev.h>
  16. #include <linux/bitops.h>
  17. #include <net/sock.h> /* for sock_no_* */
  18. #include <asm/uaccess.h>
  19. #include "resources.h"
  20. #include "common.h" /* common for PVCs and SVCs */
  21. #include "signaling.h"
  22. #include "addr.h"
  23. #if 0
  24. #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
  25. #else
  26. #define DPRINTK(format,args...)
  27. #endif
  28. static int svc_create(struct socket *sock,int protocol);
  29. /*
  30. * Note: since all this is still nicely synchronized with the signaling demon,
  31. * there's no need to protect sleep loops with clis. If signaling is
  32. * moved into the kernel, that would change.
  33. */
  34. static int svc_shutdown(struct socket *sock,int how)
  35. {
  36. return 0;
  37. }
  38. static void svc_disconnect(struct atm_vcc *vcc)
  39. {
  40. DEFINE_WAIT(wait);
  41. struct sk_buff *skb;
  42. struct sock *sk = sk_atm(vcc);
  43. DPRINTK("svc_disconnect %p\n",vcc);
  44. if (test_bit(ATM_VF_REGIS,&vcc->flags)) {
  45. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  46. sigd_enq(vcc,as_close,NULL,NULL,NULL);
  47. while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) {
  48. schedule();
  49. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  50. }
  51. finish_wait(sk->sk_sleep, &wait);
  52. }
  53. /* beware - socket is still in use by atmsigd until the last
  54. as_indicate has been answered */
  55. while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
  56. atm_return(vcc, skb->truesize);
  57. DPRINTK("LISTEN REL\n");
  58. sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0);
  59. dev_kfree_skb(skb);
  60. }
  61. clear_bit(ATM_VF_REGIS, &vcc->flags);
  62. /* ... may retry later */
  63. }
  64. static int svc_release(struct socket *sock)
  65. {
  66. struct sock *sk = sock->sk;
  67. struct atm_vcc *vcc;
  68. if (sk) {
  69. vcc = ATM_SD(sock);
  70. DPRINTK("svc_release %p\n", vcc);
  71. clear_bit(ATM_VF_READY, &vcc->flags);
  72. /* VCC pointer is used as a reference, so we must not free it
  73. (thereby subjecting it to re-use) before all pending connections
  74. are closed */
  75. svc_disconnect(vcc);
  76. vcc_release(sock);
  77. }
  78. return 0;
  79. }
  80. static int svc_bind(struct socket *sock,struct sockaddr *sockaddr,
  81. int sockaddr_len)
  82. {
  83. DEFINE_WAIT(wait);
  84. struct sock *sk = sock->sk;
  85. struct sockaddr_atmsvc *addr;
  86. struct atm_vcc *vcc;
  87. int error;
  88. if (sockaddr_len != sizeof(struct sockaddr_atmsvc))
  89. return -EINVAL;
  90. lock_sock(sk);
  91. if (sock->state == SS_CONNECTED) {
  92. error = -EISCONN;
  93. goto out;
  94. }
  95. if (sock->state != SS_UNCONNECTED) {
  96. error = -EINVAL;
  97. goto out;
  98. }
  99. vcc = ATM_SD(sock);
  100. addr = (struct sockaddr_atmsvc *) sockaddr;
  101. if (addr->sas_family != AF_ATMSVC) {
  102. error = -EAFNOSUPPORT;
  103. goto out;
  104. }
  105. clear_bit(ATM_VF_BOUND,&vcc->flags);
  106. /* failing rebind will kill old binding */
  107. /* @@@ check memory (de)allocation on rebind */
  108. if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) {
  109. error = -EBADFD;
  110. goto out;
  111. }
  112. vcc->local = *addr;
  113. set_bit(ATM_VF_WAITING, &vcc->flags);
  114. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  115. sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local);
  116. while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
  117. schedule();
  118. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  119. }
  120. finish_wait(sk->sk_sleep, &wait);
  121. clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */
  122. if (!sigd) {
  123. error = -EUNATCH;
  124. goto out;
  125. }
  126. if (!sk->sk_err)
  127. set_bit(ATM_VF_BOUND,&vcc->flags);
  128. error = -sk->sk_err;
  129. out:
  130. release_sock(sk);
  131. return error;
  132. }
  133. static int svc_connect(struct socket *sock,struct sockaddr *sockaddr,
  134. int sockaddr_len,int flags)
  135. {
  136. DEFINE_WAIT(wait);
  137. struct sock *sk = sock->sk;
  138. struct sockaddr_atmsvc *addr;
  139. struct atm_vcc *vcc = ATM_SD(sock);
  140. int error;
  141. DPRINTK("svc_connect %p\n",vcc);
  142. lock_sock(sk);
  143. if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) {
  144. error = -EINVAL;
  145. goto out;
  146. }
  147. switch (sock->state) {
  148. default:
  149. error = -EINVAL;
  150. goto out;
  151. case SS_CONNECTED:
  152. error = -EISCONN;
  153. goto out;
  154. case SS_CONNECTING:
  155. if (test_bit(ATM_VF_WAITING, &vcc->flags)) {
  156. error = -EALREADY;
  157. goto out;
  158. }
  159. sock->state = SS_UNCONNECTED;
  160. if (sk->sk_err) {
  161. error = -sk->sk_err;
  162. goto out;
  163. }
  164. break;
  165. case SS_UNCONNECTED:
  166. addr = (struct sockaddr_atmsvc *) sockaddr;
  167. if (addr->sas_family != AF_ATMSVC) {
  168. error = -EAFNOSUPPORT;
  169. goto out;
  170. }
  171. if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) {
  172. error = -EBADFD;
  173. goto out;
  174. }
  175. if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS ||
  176. vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) {
  177. error = -EINVAL;
  178. goto out;
  179. }
  180. if (!vcc->qos.txtp.traffic_class &&
  181. !vcc->qos.rxtp.traffic_class) {
  182. error = -EINVAL;
  183. goto out;
  184. }
  185. vcc->remote = *addr;
  186. set_bit(ATM_VF_WAITING, &vcc->flags);
  187. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  188. sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote);
  189. if (flags & O_NONBLOCK) {
  190. finish_wait(sk->sk_sleep, &wait);
  191. sock->state = SS_CONNECTING;
  192. error = -EINPROGRESS;
  193. goto out;
  194. }
  195. error = 0;
  196. while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
  197. schedule();
  198. if (!signal_pending(current)) {
  199. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  200. continue;
  201. }
  202. DPRINTK("*ABORT*\n");
  203. /*
  204. * This is tricky:
  205. * Kernel ---close--> Demon
  206. * Kernel <--close--- Demon
  207. * or
  208. * Kernel ---close--> Demon
  209. * Kernel <--error--- Demon
  210. * or
  211. * Kernel ---close--> Demon
  212. * Kernel <--okay---- Demon
  213. * Kernel <--close--- Demon
  214. */
  215. sigd_enq(vcc,as_close,NULL,NULL,NULL);
  216. while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
  217. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  218. schedule();
  219. }
  220. if (!sk->sk_err)
  221. while (!test_bit(ATM_VF_RELEASED,&vcc->flags)
  222. && sigd) {
  223. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  224. schedule();
  225. }
  226. clear_bit(ATM_VF_REGIS,&vcc->flags);
  227. clear_bit(ATM_VF_RELEASED,&vcc->flags);
  228. clear_bit(ATM_VF_CLOSE,&vcc->flags);
  229. /* we're gone now but may connect later */
  230. error = -EINTR;
  231. break;
  232. }
  233. finish_wait(sk->sk_sleep, &wait);
  234. if (error)
  235. goto out;
  236. if (!sigd) {
  237. error = -EUNATCH;
  238. goto out;
  239. }
  240. if (sk->sk_err) {
  241. error = -sk->sk_err;
  242. goto out;
  243. }
  244. }
  245. /*
  246. * Not supported yet
  247. *
  248. * #ifndef CONFIG_SINGLE_SIGITF
  249. */
  250. vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp);
  251. vcc->qos.txtp.pcr = 0;
  252. vcc->qos.txtp.min_pcr = 0;
  253. /*
  254. * #endif
  255. */
  256. if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci)))
  257. sock->state = SS_CONNECTED;
  258. else
  259. (void) svc_disconnect(vcc);
  260. out:
  261. release_sock(sk);
  262. return error;
  263. }
  264. static int svc_listen(struct socket *sock,int backlog)
  265. {
  266. DEFINE_WAIT(wait);
  267. struct sock *sk = sock->sk;
  268. struct atm_vcc *vcc = ATM_SD(sock);
  269. int error;
  270. DPRINTK("svc_listen %p\n",vcc);
  271. lock_sock(sk);
  272. /* let server handle listen on unbound sockets */
  273. if (test_bit(ATM_VF_SESSION,&vcc->flags)) {
  274. error = -EINVAL;
  275. goto out;
  276. }
  277. vcc_insert_socket(sk);
  278. set_bit(ATM_VF_WAITING, &vcc->flags);
  279. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  280. sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local);
  281. while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
  282. schedule();
  283. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  284. }
  285. finish_wait(sk->sk_sleep, &wait);
  286. if (!sigd) {
  287. error = -EUNATCH;
  288. goto out;
  289. }
  290. set_bit(ATM_VF_LISTEN,&vcc->flags);
  291. sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT;
  292. error = -sk->sk_err;
  293. out:
  294. release_sock(sk);
  295. return error;
  296. }
  297. static int svc_accept(struct socket *sock,struct socket *newsock,int flags)
  298. {
  299. struct sock *sk = sock->sk;
  300. struct sk_buff *skb;
  301. struct atmsvc_msg *msg;
  302. struct atm_vcc *old_vcc = ATM_SD(sock);
  303. struct atm_vcc *new_vcc;
  304. int error;
  305. lock_sock(sk);
  306. error = svc_create(newsock,0);
  307. if (error)
  308. goto out;
  309. new_vcc = ATM_SD(newsock);
  310. DPRINTK("svc_accept %p -> %p\n",old_vcc,new_vcc);
  311. while (1) {
  312. DEFINE_WAIT(wait);
  313. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  314. while (!(skb = skb_dequeue(&sk->sk_receive_queue)) &&
  315. sigd) {
  316. if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break;
  317. if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) {
  318. error = -sk->sk_err;
  319. break;
  320. }
  321. if (flags & O_NONBLOCK) {
  322. error = -EAGAIN;
  323. break;
  324. }
  325. release_sock(sk);
  326. schedule();
  327. lock_sock(sk);
  328. if (signal_pending(current)) {
  329. error = -ERESTARTSYS;
  330. break;
  331. }
  332. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  333. }
  334. finish_wait(sk->sk_sleep, &wait);
  335. if (error)
  336. goto out;
  337. if (!skb) {
  338. error = -EUNATCH;
  339. goto out;
  340. }
  341. msg = (struct atmsvc_msg *) skb->data;
  342. new_vcc->qos = msg->qos;
  343. set_bit(ATM_VF_HASQOS,&new_vcc->flags);
  344. new_vcc->remote = msg->svc;
  345. new_vcc->local = msg->local;
  346. new_vcc->sap = msg->sap;
  347. error = vcc_connect(newsock, msg->pvc.sap_addr.itf,
  348. msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci);
  349. dev_kfree_skb(skb);
  350. sk->sk_ack_backlog--;
  351. if (error) {
  352. sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL,
  353. &old_vcc->qos,error);
  354. error = error == -EAGAIN ? -EBUSY : error;
  355. goto out;
  356. }
  357. /* wait should be short, so we ignore the non-blocking flag */
  358. set_bit(ATM_VF_WAITING, &new_vcc->flags);
  359. prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  360. sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL);
  361. while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) {
  362. release_sock(sk);
  363. schedule();
  364. lock_sock(sk);
  365. prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  366. }
  367. finish_wait(sk_atm(new_vcc)->sk_sleep, &wait);
  368. if (!sigd) {
  369. error = -EUNATCH;
  370. goto out;
  371. }
  372. if (!sk_atm(new_vcc)->sk_err)
  373. break;
  374. if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) {
  375. error = -sk_atm(new_vcc)->sk_err;
  376. goto out;
  377. }
  378. }
  379. newsock->state = SS_CONNECTED;
  380. out:
  381. release_sock(sk);
  382. return error;
  383. }
  384. static int svc_getname(struct socket *sock,struct sockaddr *sockaddr,
  385. int *sockaddr_len,int peer)
  386. {
  387. struct sockaddr_atmsvc *addr;
  388. *sockaddr_len = sizeof(struct sockaddr_atmsvc);
  389. addr = (struct sockaddr_atmsvc *) sockaddr;
  390. memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local,
  391. sizeof(struct sockaddr_atmsvc));
  392. return 0;
  393. }
  394. int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos)
  395. {
  396. struct sock *sk = sk_atm(vcc);
  397. DEFINE_WAIT(wait);
  398. set_bit(ATM_VF_WAITING, &vcc->flags);
  399. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  400. sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0);
  401. while (test_bit(ATM_VF_WAITING, &vcc->flags) &&
  402. !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) {
  403. schedule();
  404. prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE);
  405. }
  406. finish_wait(sk->sk_sleep, &wait);
  407. if (!sigd) return -EUNATCH;
  408. return -sk->sk_err;
  409. }
  410. static int svc_setsockopt(struct socket *sock, int level, int optname,
  411. char __user *optval, int optlen)
  412. {
  413. struct sock *sk = sock->sk;
  414. struct atm_vcc *vcc = ATM_SD(sock);
  415. int value, error = 0;
  416. lock_sock(sk);
  417. switch (optname) {
  418. case SO_ATMSAP:
  419. if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) {
  420. error = -EINVAL;
  421. goto out;
  422. }
  423. if (copy_from_user(&vcc->sap, optval, optlen)) {
  424. error = -EFAULT;
  425. goto out;
  426. }
  427. set_bit(ATM_VF_HASSAP, &vcc->flags);
  428. break;
  429. case SO_MULTIPOINT:
  430. if (level != SOL_ATM || optlen != sizeof(int)) {
  431. error = -EINVAL;
  432. goto out;
  433. }
  434. if (get_user(value, (int __user *) optval)) {
  435. error = -EFAULT;
  436. goto out;
  437. }
  438. if (value == 1) {
  439. set_bit(ATM_VF_SESSION, &vcc->flags);
  440. } else if (value == 0) {
  441. clear_bit(ATM_VF_SESSION, &vcc->flags);
  442. } else {
  443. error = -EINVAL;
  444. }
  445. break;
  446. default:
  447. error = vcc_setsockopt(sock, level, optname,
  448. optval, optlen);
  449. }
  450. out:
  451. release_sock(sk);
  452. return error;
  453. }
  454. static int svc_getsockopt(struct socket *sock,int level,int optname,
  455. char __user *optval,int __user *optlen)
  456. {
  457. struct sock *sk = sock->sk;
  458. int error = 0, len;
  459. lock_sock(sk);
  460. if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) {
  461. error = vcc_getsockopt(sock, level, optname, optval, optlen);
  462. goto out;
  463. }
  464. if (get_user(len, optlen)) {
  465. error = -EFAULT;
  466. goto out;
  467. }
  468. if (len != sizeof(struct atm_sap)) {
  469. error = -EINVAL;
  470. goto out;
  471. }
  472. if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) {
  473. error = -EFAULT;
  474. goto out;
  475. }
  476. out:
  477. release_sock(sk);
  478. return error;
  479. }
  480. static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr,
  481. int sockaddr_len, int flags)
  482. {
  483. DEFINE_WAIT(wait);
  484. struct sock *sk = sock->sk;
  485. struct atm_vcc *vcc = ATM_SD(sock);
  486. int error;
  487. lock_sock(sk);
  488. set_bit(ATM_VF_WAITING, &vcc->flags);
  489. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  490. sigd_enq(vcc, as_addparty, NULL, NULL,
  491. (struct sockaddr_atmsvc *) sockaddr);
  492. if (flags & O_NONBLOCK) {
  493. finish_wait(sk->sk_sleep, &wait);
  494. error = -EINPROGRESS;
  495. goto out;
  496. }
  497. DPRINTK("svc_addparty added wait queue\n");
  498. while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
  499. schedule();
  500. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  501. }
  502. finish_wait(sk->sk_sleep, &wait);
  503. error = xchg(&sk->sk_err_soft, 0);
  504. out:
  505. release_sock(sk);
  506. return error;
  507. }
  508. static int svc_dropparty(struct socket *sock, int ep_ref)
  509. {
  510. DEFINE_WAIT(wait);
  511. struct sock *sk = sock->sk;
  512. struct atm_vcc *vcc = ATM_SD(sock);
  513. int error;
  514. lock_sock(sk);
  515. set_bit(ATM_VF_WAITING, &vcc->flags);
  516. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  517. sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref);
  518. while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) {
  519. schedule();
  520. prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
  521. }
  522. finish_wait(sk->sk_sleep, &wait);
  523. if (!sigd) {
  524. error = -EUNATCH;
  525. goto out;
  526. }
  527. error = xchg(&sk->sk_err_soft, 0);
  528. out:
  529. release_sock(sk);
  530. return error;
  531. }
  532. static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
  533. {
  534. int error, ep_ref;
  535. struct sockaddr_atmsvc sa;
  536. struct atm_vcc *vcc = ATM_SD(sock);
  537. switch (cmd) {
  538. case ATM_ADDPARTY:
  539. if (!test_bit(ATM_VF_SESSION, &vcc->flags))
  540. return -EINVAL;
  541. if (copy_from_user(&sa, (void __user *) arg, sizeof(sa)))
  542. return -EFAULT;
  543. error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0);
  544. break;
  545. case ATM_DROPPARTY:
  546. if (!test_bit(ATM_VF_SESSION, &vcc->flags))
  547. return -EINVAL;
  548. if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int)))
  549. return -EFAULT;
  550. error = svc_dropparty(sock, ep_ref);
  551. break;
  552. default:
  553. error = vcc_ioctl(sock, cmd, arg);
  554. }
  555. return error;
  556. }
  557. static const struct proto_ops svc_proto_ops = {
  558. .family = PF_ATMSVC,
  559. .owner = THIS_MODULE,
  560. .release = svc_release,
  561. .bind = svc_bind,
  562. .connect = svc_connect,
  563. .socketpair = sock_no_socketpair,
  564. .accept = svc_accept,
  565. .getname = svc_getname,
  566. .poll = vcc_poll,
  567. .ioctl = svc_ioctl,
  568. .listen = svc_listen,
  569. .shutdown = svc_shutdown,
  570. .setsockopt = svc_setsockopt,
  571. .getsockopt = svc_getsockopt,
  572. .sendmsg = vcc_sendmsg,
  573. .recvmsg = vcc_recvmsg,
  574. .mmap = sock_no_mmap,
  575. .sendpage = sock_no_sendpage,
  576. };
  577. static int svc_create(struct socket *sock,int protocol)
  578. {
  579. int error;
  580. sock->ops = &svc_proto_ops;
  581. error = vcc_create(sock, protocol, AF_ATMSVC);
  582. if (error) return error;
  583. ATM_SD(sock)->local.sas_family = AF_ATMSVC;
  584. ATM_SD(sock)->remote.sas_family = AF_ATMSVC;
  585. return 0;
  586. }
  587. static struct net_proto_family svc_family_ops = {
  588. .family = PF_ATMSVC,
  589. .create = svc_create,
  590. .owner = THIS_MODULE,
  591. };
  592. /*
  593. * Initialize the ATM SVC protocol family
  594. */
  595. int __init atmsvc_init(void)
  596. {
  597. return sock_register(&svc_family_ops);
  598. }
  599. void atmsvc_exit(void)
  600. {
  601. sock_unregister(PF_ATMSVC);
  602. }