compat.c 18 KB

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  1. /*
  2. * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
  3. *
  4. * Copyright (C) 2000 VA Linux Co
  5. * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
  6. * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
  7. * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  8. * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
  9. * Copyright (C) 2000 Hewlett-Packard Co.
  10. * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
  11. * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
  12. */
  13. #include <linux/kernel.h>
  14. #include <linux/fs.h>
  15. #include <linux/types.h>
  16. #include <linux/file.h>
  17. #include <linux/icmpv6.h>
  18. #include <linux/socket.h>
  19. #include <linux/syscalls.h>
  20. #include <linux/filter.h>
  21. #include <linux/compat.h>
  22. #include <linux/netfilter_ipv4/ip_tables.h>
  23. #include <linux/security.h>
  24. #include <net/scm.h>
  25. #include <net/sock.h>
  26. #include <asm/uaccess.h>
  27. #include <net/compat.h>
  28. static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
  29. struct compat_iovec __user *uiov32,
  30. int niov)
  31. {
  32. int tot_len = 0;
  33. while(niov > 0) {
  34. compat_uptr_t buf;
  35. compat_size_t len;
  36. if(get_user(len, &uiov32->iov_len) ||
  37. get_user(buf, &uiov32->iov_base)) {
  38. tot_len = -EFAULT;
  39. break;
  40. }
  41. tot_len += len;
  42. kiov->iov_base = compat_ptr(buf);
  43. kiov->iov_len = (__kernel_size_t) len;
  44. uiov32++;
  45. kiov++;
  46. niov--;
  47. }
  48. return tot_len;
  49. }
  50. int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
  51. {
  52. compat_uptr_t tmp1, tmp2, tmp3;
  53. if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
  54. __get_user(tmp1, &umsg->msg_name) ||
  55. __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
  56. __get_user(tmp2, &umsg->msg_iov) ||
  57. __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
  58. __get_user(tmp3, &umsg->msg_control) ||
  59. __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
  60. __get_user(kmsg->msg_flags, &umsg->msg_flags))
  61. return -EFAULT;
  62. kmsg->msg_name = compat_ptr(tmp1);
  63. kmsg->msg_iov = compat_ptr(tmp2);
  64. kmsg->msg_control = compat_ptr(tmp3);
  65. return 0;
  66. }
  67. /* I've named the args so it is easy to tell whose space the pointers are in. */
  68. int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
  69. char *kern_address, int mode)
  70. {
  71. int tot_len;
  72. if(kern_msg->msg_namelen) {
  73. if(mode==VERIFY_READ) {
  74. int err = move_addr_to_kernel(kern_msg->msg_name,
  75. kern_msg->msg_namelen,
  76. kern_address);
  77. if(err < 0)
  78. return err;
  79. }
  80. kern_msg->msg_name = kern_address;
  81. } else
  82. kern_msg->msg_name = NULL;
  83. tot_len = iov_from_user_compat_to_kern(kern_iov,
  84. (struct compat_iovec __user *)kern_msg->msg_iov,
  85. kern_msg->msg_iovlen);
  86. if(tot_len >= 0)
  87. kern_msg->msg_iov = kern_iov;
  88. return tot_len;
  89. }
  90. /* Bleech... */
  91. #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
  92. #define CMSG_COMPAT_DATA(cmsg) \
  93. ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
  94. #define CMSG_COMPAT_SPACE(len) \
  95. (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
  96. #define CMSG_COMPAT_LEN(len) \
  97. (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
  98. #define CMSG_COMPAT_FIRSTHDR(msg) \
  99. (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
  100. (struct compat_cmsghdr __user *)((msg)->msg_control) : \
  101. (struct compat_cmsghdr __user *)NULL)
  102. #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
  103. ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
  104. (ucmlen) <= (unsigned long) \
  105. ((mhdr)->msg_controllen - \
  106. ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
  107. static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
  108. struct compat_cmsghdr __user *cmsg, int cmsg_len)
  109. {
  110. char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
  111. if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
  112. msg->msg_controllen)
  113. return NULL;
  114. return (struct compat_cmsghdr __user *)ptr;
  115. }
  116. /* There is a lot of hair here because the alignment rules (and
  117. * thus placement) of cmsg headers and length are different for
  118. * 32-bit apps. -DaveM
  119. */
  120. int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
  121. unsigned char *stackbuf, int stackbuf_size)
  122. {
  123. struct compat_cmsghdr __user *ucmsg;
  124. struct cmsghdr *kcmsg, *kcmsg_base;
  125. compat_size_t ucmlen;
  126. __kernel_size_t kcmlen, tmp;
  127. int err = -EFAULT;
  128. kcmlen = 0;
  129. kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
  130. ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
  131. while(ucmsg != NULL) {
  132. if(get_user(ucmlen, &ucmsg->cmsg_len))
  133. return -EFAULT;
  134. /* Catch bogons. */
  135. if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
  136. return -EINVAL;
  137. tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
  138. CMSG_ALIGN(sizeof(struct cmsghdr)));
  139. tmp = CMSG_ALIGN(tmp);
  140. kcmlen += tmp;
  141. ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
  142. }
  143. if(kcmlen == 0)
  144. return -EINVAL;
  145. /* The kcmlen holds the 64-bit version of the control length.
  146. * It may not be modified as we do not stick it into the kmsg
  147. * until we have successfully copied over all of the data
  148. * from the user.
  149. */
  150. if (kcmlen > stackbuf_size)
  151. kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
  152. if (kcmsg == NULL)
  153. return -ENOBUFS;
  154. /* Now copy them over neatly. */
  155. memset(kcmsg, 0, kcmlen);
  156. ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
  157. while(ucmsg != NULL) {
  158. if (__get_user(ucmlen, &ucmsg->cmsg_len))
  159. goto Efault;
  160. if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
  161. goto Einval;
  162. tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
  163. CMSG_ALIGN(sizeof(struct cmsghdr)));
  164. if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
  165. goto Einval;
  166. kcmsg->cmsg_len = tmp;
  167. tmp = CMSG_ALIGN(tmp);
  168. if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
  169. __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
  170. copy_from_user(CMSG_DATA(kcmsg),
  171. CMSG_COMPAT_DATA(ucmsg),
  172. (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
  173. goto Efault;
  174. /* Advance. */
  175. kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
  176. ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
  177. }
  178. /* Ok, looks like we made it. Hook it up and return success. */
  179. kmsg->msg_control = kcmsg_base;
  180. kmsg->msg_controllen = kcmlen;
  181. return 0;
  182. Einval:
  183. err = -EINVAL;
  184. Efault:
  185. if (kcmsg_base != (struct cmsghdr *)stackbuf)
  186. sock_kfree_s(sk, kcmsg_base, kcmlen);
  187. return err;
  188. }
  189. int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
  190. {
  191. struct compat_timeval ctv;
  192. struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
  193. struct compat_cmsghdr cmhdr;
  194. int cmlen;
  195. if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
  196. kmsg->msg_flags |= MSG_CTRUNC;
  197. return 0; /* XXX: return error? check spec. */
  198. }
  199. if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
  200. struct timeval *tv = (struct timeval *)data;
  201. ctv.tv_sec = tv->tv_sec;
  202. ctv.tv_usec = tv->tv_usec;
  203. data = &ctv;
  204. len = sizeof(struct compat_timeval);
  205. }
  206. cmlen = CMSG_COMPAT_LEN(len);
  207. if(kmsg->msg_controllen < cmlen) {
  208. kmsg->msg_flags |= MSG_CTRUNC;
  209. cmlen = kmsg->msg_controllen;
  210. }
  211. cmhdr.cmsg_level = level;
  212. cmhdr.cmsg_type = type;
  213. cmhdr.cmsg_len = cmlen;
  214. if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
  215. return -EFAULT;
  216. if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
  217. return -EFAULT;
  218. cmlen = CMSG_COMPAT_SPACE(len);
  219. kmsg->msg_control += cmlen;
  220. kmsg->msg_controllen -= cmlen;
  221. return 0;
  222. }
  223. void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
  224. {
  225. struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
  226. int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
  227. int fdnum = scm->fp->count;
  228. struct file **fp = scm->fp->fp;
  229. int __user *cmfptr;
  230. int err = 0, i;
  231. if (fdnum < fdmax)
  232. fdmax = fdnum;
  233. for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
  234. int new_fd;
  235. err = security_file_receive(fp[i]);
  236. if (err)
  237. break;
  238. err = get_unused_fd();
  239. if (err < 0)
  240. break;
  241. new_fd = err;
  242. err = put_user(new_fd, cmfptr);
  243. if (err) {
  244. put_unused_fd(new_fd);
  245. break;
  246. }
  247. /* Bump the usage count and install the file. */
  248. get_file(fp[i]);
  249. fd_install(new_fd, fp[i]);
  250. }
  251. if (i > 0) {
  252. int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
  253. err = put_user(SOL_SOCKET, &cm->cmsg_level);
  254. if (!err)
  255. err = put_user(SCM_RIGHTS, &cm->cmsg_type);
  256. if (!err)
  257. err = put_user(cmlen, &cm->cmsg_len);
  258. if (!err) {
  259. cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
  260. kmsg->msg_control += cmlen;
  261. kmsg->msg_controllen -= cmlen;
  262. }
  263. }
  264. if (i < fdnum)
  265. kmsg->msg_flags |= MSG_CTRUNC;
  266. /*
  267. * All of the files that fit in the message have had their
  268. * usage counts incremented, so we just free the list.
  269. */
  270. __scm_destroy(scm);
  271. }
  272. /*
  273. * For now, we assume that the compatibility and native version
  274. * of struct ipt_entry are the same - sfr. FIXME
  275. */
  276. struct compat_ipt_replace {
  277. char name[IPT_TABLE_MAXNAMELEN];
  278. u32 valid_hooks;
  279. u32 num_entries;
  280. u32 size;
  281. u32 hook_entry[NF_IP_NUMHOOKS];
  282. u32 underflow[NF_IP_NUMHOOKS];
  283. u32 num_counters;
  284. compat_uptr_t counters; /* struct ipt_counters * */
  285. struct ipt_entry entries[0];
  286. };
  287. static int do_netfilter_replace(int fd, int level, int optname,
  288. char __user *optval, int optlen)
  289. {
  290. struct compat_ipt_replace __user *urepl;
  291. struct ipt_replace __user *repl_nat;
  292. char name[IPT_TABLE_MAXNAMELEN];
  293. u32 origsize, tmp32, num_counters;
  294. unsigned int repl_nat_size;
  295. int ret;
  296. int i;
  297. compat_uptr_t ucntrs;
  298. urepl = (struct compat_ipt_replace __user *)optval;
  299. if (get_user(origsize, &urepl->size))
  300. return -EFAULT;
  301. /* Hack: Causes ipchains to give correct error msg --RR */
  302. if (optlen != sizeof(*urepl) + origsize)
  303. return -ENOPROTOOPT;
  304. /* XXX Assumes that size of ipt_entry is the same both in
  305. * native and compat environments.
  306. */
  307. repl_nat_size = sizeof(*repl_nat) + origsize;
  308. repl_nat = compat_alloc_user_space(repl_nat_size);
  309. ret = -EFAULT;
  310. if (put_user(origsize, &repl_nat->size))
  311. goto out;
  312. if (!access_ok(VERIFY_READ, urepl, optlen) ||
  313. !access_ok(VERIFY_WRITE, repl_nat, optlen))
  314. goto out;
  315. if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) ||
  316. __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name)))
  317. goto out;
  318. if (__get_user(tmp32, &urepl->valid_hooks) ||
  319. __put_user(tmp32, &repl_nat->valid_hooks))
  320. goto out;
  321. if (__get_user(tmp32, &urepl->num_entries) ||
  322. __put_user(tmp32, &repl_nat->num_entries))
  323. goto out;
  324. if (__get_user(num_counters, &urepl->num_counters) ||
  325. __put_user(num_counters, &repl_nat->num_counters))
  326. goto out;
  327. if (__get_user(ucntrs, &urepl->counters) ||
  328. __put_user(compat_ptr(ucntrs), &repl_nat->counters))
  329. goto out;
  330. if (__copy_in_user(&repl_nat->entries[0],
  331. &urepl->entries[0],
  332. origsize))
  333. goto out;
  334. for (i = 0; i < NF_IP_NUMHOOKS; i++) {
  335. if (__get_user(tmp32, &urepl->hook_entry[i]) ||
  336. __put_user(tmp32, &repl_nat->hook_entry[i]) ||
  337. __get_user(tmp32, &urepl->underflow[i]) ||
  338. __put_user(tmp32, &repl_nat->underflow[i]))
  339. goto out;
  340. }
  341. /*
  342. * Since struct ipt_counters just contains two u_int64_t members
  343. * we can just do the access_ok check here and pass the (converted)
  344. * pointer into the standard syscall. We hope that the pointer is
  345. * not misaligned ...
  346. */
  347. if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs),
  348. num_counters * sizeof(struct ipt_counters)))
  349. goto out;
  350. ret = sys_setsockopt(fd, level, optname,
  351. (char __user *)repl_nat, repl_nat_size);
  352. out:
  353. return ret;
  354. }
  355. /*
  356. * A struct sock_filter is architecture independent.
  357. */
  358. struct compat_sock_fprog {
  359. u16 len;
  360. compat_uptr_t filter; /* struct sock_filter * */
  361. };
  362. static int do_set_attach_filter(struct socket *sock, int level, int optname,
  363. char __user *optval, int optlen)
  364. {
  365. struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
  366. struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
  367. compat_uptr_t ptr;
  368. u16 len;
  369. if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
  370. !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
  371. __get_user(len, &fprog32->len) ||
  372. __get_user(ptr, &fprog32->filter) ||
  373. __put_user(len, &kfprog->len) ||
  374. __put_user(compat_ptr(ptr), &kfprog->filter))
  375. return -EFAULT;
  376. return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
  377. sizeof(struct sock_fprog));
  378. }
  379. static int do_set_sock_timeout(struct socket *sock, int level,
  380. int optname, char __user *optval, int optlen)
  381. {
  382. struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
  383. struct timeval ktime;
  384. mm_segment_t old_fs;
  385. int err;
  386. if (optlen < sizeof(*up))
  387. return -EINVAL;
  388. if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
  389. __get_user(ktime.tv_sec, &up->tv_sec) ||
  390. __get_user(ktime.tv_usec, &up->tv_usec))
  391. return -EFAULT;
  392. old_fs = get_fs();
  393. set_fs(KERNEL_DS);
  394. err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
  395. set_fs(old_fs);
  396. return err;
  397. }
  398. static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
  399. char __user *optval, int optlen)
  400. {
  401. if (optname == SO_ATTACH_FILTER)
  402. return do_set_attach_filter(sock, level, optname,
  403. optval, optlen);
  404. if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
  405. return do_set_sock_timeout(sock, level, optname, optval, optlen);
  406. return sock_setsockopt(sock, level, optname, optval, optlen);
  407. }
  408. asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
  409. char __user *optval, int optlen)
  410. {
  411. int err;
  412. struct socket *sock;
  413. if (level == SOL_IPV6 && optname == IPT_SO_SET_REPLACE)
  414. return do_netfilter_replace(fd, level, optname,
  415. optval, optlen);
  416. if (optlen < 0)
  417. return -EINVAL;
  418. if ((sock = sockfd_lookup(fd, &err))!=NULL)
  419. {
  420. err = security_socket_setsockopt(sock,level,optname);
  421. if (err) {
  422. sockfd_put(sock);
  423. return err;
  424. }
  425. if (level == SOL_SOCKET)
  426. err = compat_sock_setsockopt(sock, level,
  427. optname, optval, optlen);
  428. else if (sock->ops->compat_setsockopt)
  429. err = sock->ops->compat_setsockopt(sock, level,
  430. optname, optval, optlen);
  431. else
  432. err = sock->ops->setsockopt(sock, level,
  433. optname, optval, optlen);
  434. sockfd_put(sock);
  435. }
  436. return err;
  437. }
  438. static int do_get_sock_timeout(struct socket *sock, int level, int optname,
  439. char __user *optval, int __user *optlen)
  440. {
  441. struct compat_timeval __user *up;
  442. struct timeval ktime;
  443. mm_segment_t old_fs;
  444. int len, err;
  445. up = (struct compat_timeval __user *) optval;
  446. if (get_user(len, optlen))
  447. return -EFAULT;
  448. if (len < sizeof(*up))
  449. return -EINVAL;
  450. len = sizeof(ktime);
  451. old_fs = get_fs();
  452. set_fs(KERNEL_DS);
  453. err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
  454. set_fs(old_fs);
  455. if (!err) {
  456. if (put_user(sizeof(*up), optlen) ||
  457. !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
  458. __put_user(ktime.tv_sec, &up->tv_sec) ||
  459. __put_user(ktime.tv_usec, &up->tv_usec))
  460. err = -EFAULT;
  461. }
  462. return err;
  463. }
  464. static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
  465. char __user *optval, int __user *optlen)
  466. {
  467. if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
  468. return do_get_sock_timeout(sock, level, optname, optval, optlen);
  469. return sock_getsockopt(sock, level, optname, optval, optlen);
  470. }
  471. int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
  472. {
  473. struct compat_timeval __user *ctv =
  474. (struct compat_timeval __user*) userstamp;
  475. int err = -ENOENT;
  476. if (!sock_flag(sk, SOCK_TIMESTAMP))
  477. sock_enable_timestamp(sk);
  478. if (sk->sk_stamp.tv_sec == -1)
  479. return err;
  480. if (sk->sk_stamp.tv_sec == 0)
  481. do_gettimeofday(&sk->sk_stamp);
  482. if (put_user(sk->sk_stamp.tv_sec, &ctv->tv_sec) ||
  483. put_user(sk->sk_stamp.tv_usec, &ctv->tv_usec))
  484. err = -EFAULT;
  485. return err;
  486. }
  487. EXPORT_SYMBOL(compat_sock_get_timestamp);
  488. asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
  489. char __user *optval, int __user *optlen)
  490. {
  491. int err;
  492. struct socket *sock;
  493. if ((sock = sockfd_lookup(fd, &err))!=NULL)
  494. {
  495. err = security_socket_getsockopt(sock, level,
  496. optname);
  497. if (err) {
  498. sockfd_put(sock);
  499. return err;
  500. }
  501. if (level == SOL_SOCKET)
  502. err = compat_sock_getsockopt(sock, level,
  503. optname, optval, optlen);
  504. else if (sock->ops->compat_getsockopt)
  505. err = sock->ops->compat_getsockopt(sock, level,
  506. optname, optval, optlen);
  507. else
  508. err = sock->ops->getsockopt(sock, level,
  509. optname, optval, optlen);
  510. sockfd_put(sock);
  511. }
  512. return err;
  513. }
  514. /* Argument list sizes for compat_sys_socketcall */
  515. #define AL(x) ((x) * sizeof(u32))
  516. static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
  517. AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
  518. AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
  519. #undef AL
  520. asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
  521. {
  522. return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
  523. }
  524. asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
  525. {
  526. return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
  527. }
  528. asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
  529. {
  530. int ret;
  531. u32 a[6];
  532. u32 a0, a1;
  533. if (call < SYS_SOCKET || call > SYS_RECVMSG)
  534. return -EINVAL;
  535. if (copy_from_user(a, args, nas[call]))
  536. return -EFAULT;
  537. a0 = a[0];
  538. a1 = a[1];
  539. switch(call) {
  540. case SYS_SOCKET:
  541. ret = sys_socket(a0, a1, a[2]);
  542. break;
  543. case SYS_BIND:
  544. ret = sys_bind(a0, compat_ptr(a1), a[2]);
  545. break;
  546. case SYS_CONNECT:
  547. ret = sys_connect(a0, compat_ptr(a1), a[2]);
  548. break;
  549. case SYS_LISTEN:
  550. ret = sys_listen(a0, a1);
  551. break;
  552. case SYS_ACCEPT:
  553. ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
  554. break;
  555. case SYS_GETSOCKNAME:
  556. ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
  557. break;
  558. case SYS_GETPEERNAME:
  559. ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
  560. break;
  561. case SYS_SOCKETPAIR:
  562. ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
  563. break;
  564. case SYS_SEND:
  565. ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
  566. break;
  567. case SYS_SENDTO:
  568. ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
  569. break;
  570. case SYS_RECV:
  571. ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
  572. break;
  573. case SYS_RECVFROM:
  574. ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
  575. break;
  576. case SYS_SHUTDOWN:
  577. ret = sys_shutdown(a0,a1);
  578. break;
  579. case SYS_SETSOCKOPT:
  580. ret = compat_sys_setsockopt(a0, a1, a[2],
  581. compat_ptr(a[3]), a[4]);
  582. break;
  583. case SYS_GETSOCKOPT:
  584. ret = compat_sys_getsockopt(a0, a1, a[2],
  585. compat_ptr(a[3]), compat_ptr(a[4]));
  586. break;
  587. case SYS_SENDMSG:
  588. ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
  589. break;
  590. case SYS_RECVMSG:
  591. ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
  592. break;
  593. default:
  594. ret = -EINVAL;
  595. break;
  596. }
  597. return ret;
  598. }