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 14 #include <linux/kernel.h> 15 #include <linux/fs.h> 16 #include <linux/types.h> 17 #include <linux/file.h> 18 #include <linux/icmpv6.h> 19 #include <linux/socket.h> 20 #include <linux/syscalls.h> 21 #include <linux/filter.h> 22 #include <linux/compat.h> 23 #include <linux/netfilter_ipv4/ip_tables.h> 24 #include <linux/security.h> 25 26 #include <net/scm.h> 27 #include <net/sock.h> 28 #include <asm/uaccess.h> 29 #include <net/compat.h> 30 31 static inline int iov_from_user_compat_to_kern(struct iovec *kiov, 32 struct compat_iovec __user *uiov32, 33 int niov) 34 { 35 int tot_len = 0; 36 37 while (niov > 0) { 38 compat_uptr_t buf; 39 compat_size_t len; 40 41 if (get_user(len, &uiov32->iov_len) || 42 get_user(buf, &uiov32->iov_base)) { 43 tot_len = -EFAULT; 44 break; 45 } 46 tot_len += len; 47 kiov->iov_base = compat_ptr(buf); 48 kiov->iov_len = (__kernel_size_t) len; 49 uiov32++; 50 kiov++; 51 niov--; 52 } 53 return tot_len; 54 } 55 56 int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) 57 { 58 compat_uptr_t tmp1, tmp2, tmp3; 59 60 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || 61 __get_user(tmp1, &umsg->msg_name) || 62 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || 63 __get_user(tmp2, &umsg->msg_iov) || 64 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || 65 __get_user(tmp3, &umsg->msg_control) || 66 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || 67 __get_user(kmsg->msg_flags, &umsg->msg_flags)) 68 return -EFAULT; 69 kmsg->msg_name = compat_ptr(tmp1); 70 kmsg->msg_iov = compat_ptr(tmp2); 71 kmsg->msg_control = compat_ptr(tmp3); 72 return 0; 73 } 74 75 /* I've named the args so it is easy to tell whose space the pointers are in. */ 76 int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov, 77 char *kern_address, int mode) 78 { 79 int tot_len; 80 81 if (kern_msg->msg_namelen) { 82 if (mode==VERIFY_READ) { 83 int err = move_addr_to_kernel(kern_msg->msg_name, 84 kern_msg->msg_namelen, 85 kern_address); 86 if (err < 0) 87 return err; 88 } 89 kern_msg->msg_name = kern_address; 90 } else 91 kern_msg->msg_name = NULL; 92 93 tot_len = iov_from_user_compat_to_kern(kern_iov, 94 (struct compat_iovec __user *)kern_msg->msg_iov, 95 kern_msg->msg_iovlen); 96 if (tot_len >= 0) 97 kern_msg->msg_iov = kern_iov; 98 99 return tot_len; 100 } 101 102 /* Bleech... */ 103 #define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32)) 104 105 #define CMSG_COMPAT_DATA(cmsg) \ 106 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)))) 107 #define CMSG_COMPAT_SPACE(len) \ 108 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len)) 109 #define CMSG_COMPAT_LEN(len) \ 110 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len)) 111 112 #define CMSG_COMPAT_FIRSTHDR(msg) \ 113 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \ 114 (struct compat_cmsghdr __user *)((msg)->msg_control) : \ 115 (struct compat_cmsghdr __user *)NULL) 116 117 #define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \ 118 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \ 119 (ucmlen) <= (unsigned long) \ 120 ((mhdr)->msg_controllen - \ 121 ((char *)(ucmsg) - (char *)(mhdr)->msg_control))) 122 123 static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg, 124 struct compat_cmsghdr __user *cmsg, int cmsg_len) 125 { 126 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len); 127 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) > 128 msg->msg_controllen) 129 return NULL; 130 return (struct compat_cmsghdr __user *)ptr; 131 } 132 133 /* There is a lot of hair here because the alignment rules (and 134 * thus placement) of cmsg headers and length are different for 135 * 32-bit apps. -DaveM 136 */ 137 int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk, 138 unsigned char *stackbuf, int stackbuf_size) 139 { 140 struct compat_cmsghdr __user *ucmsg; 141 struct cmsghdr *kcmsg, *kcmsg_base; 142 compat_size_t ucmlen; 143 __kernel_size_t kcmlen, tmp; 144 int err = -EFAULT; 145 146 kcmlen = 0; 147 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf; 148 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 149 while (ucmsg != NULL) { 150 if (get_user(ucmlen, &ucmsg->cmsg_len)) 151 return -EFAULT; 152 153 /* Catch bogons. */ 154 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 155 return -EINVAL; 156 157 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 158 CMSG_ALIGN(sizeof(struct cmsghdr))); 159 tmp = CMSG_ALIGN(tmp); 160 kcmlen += tmp; 161 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 162 } 163 if (kcmlen == 0) 164 return -EINVAL; 165 166 /* The kcmlen holds the 64-bit version of the control length. 167 * It may not be modified as we do not stick it into the kmsg 168 * until we have successfully copied over all of the data 169 * from the user. 170 */ 171 if (kcmlen > stackbuf_size) 172 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL); 173 if (kcmsg == NULL) 174 return -ENOBUFS; 175 176 /* Now copy them over neatly. */ 177 memset(kcmsg, 0, kcmlen); 178 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg); 179 while (ucmsg != NULL) { 180 if (__get_user(ucmlen, &ucmsg->cmsg_len)) 181 goto Efault; 182 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg)) 183 goto Einval; 184 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) + 185 CMSG_ALIGN(sizeof(struct cmsghdr))); 186 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp)) 187 goto Einval; 188 kcmsg->cmsg_len = tmp; 189 tmp = CMSG_ALIGN(tmp); 190 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) || 191 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) || 192 copy_from_user(CMSG_DATA(kcmsg), 193 CMSG_COMPAT_DATA(ucmsg), 194 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))))) 195 goto Efault; 196 197 /* Advance. */ 198 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp); 199 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen); 200 } 201 202 /* Ok, looks like we made it. Hook it up and return success. */ 203 kmsg->msg_control = kcmsg_base; 204 kmsg->msg_controllen = kcmlen; 205 return 0; 206 207 Einval: 208 err = -EINVAL; 209 Efault: 210 if (kcmsg_base != (struct cmsghdr *)stackbuf) 211 sock_kfree_s(sk, kcmsg_base, kcmlen); 212 return err; 213 } 214 215 int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data) 216 { 217 struct compat_timeval ctv; 218 struct compat_timespec cts; 219 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 220 struct compat_cmsghdr cmhdr; 221 int cmlen; 222 223 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) { 224 kmsg->msg_flags |= MSG_CTRUNC; 225 return 0; /* XXX: return error? check spec. */ 226 } 227 228 if (level == SOL_SOCKET && type == SO_TIMESTAMP) { 229 struct timeval *tv = (struct timeval *)data; 230 ctv.tv_sec = tv->tv_sec; 231 ctv.tv_usec = tv->tv_usec; 232 data = &ctv; 233 len = sizeof(ctv); 234 } 235 if (level == SOL_SOCKET && type == SO_TIMESTAMPNS) { 236 struct timespec *ts = (struct timespec *)data; 237 cts.tv_sec = ts->tv_sec; 238 cts.tv_nsec = ts->tv_nsec; 239 data = &cts; 240 len = sizeof(cts); 241 } 242 243 cmlen = CMSG_COMPAT_LEN(len); 244 if (kmsg->msg_controllen < cmlen) { 245 kmsg->msg_flags |= MSG_CTRUNC; 246 cmlen = kmsg->msg_controllen; 247 } 248 cmhdr.cmsg_level = level; 249 cmhdr.cmsg_type = type; 250 cmhdr.cmsg_len = cmlen; 251 252 if (copy_to_user(cm, &cmhdr, sizeof cmhdr)) 253 return -EFAULT; 254 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr))) 255 return -EFAULT; 256 cmlen = CMSG_COMPAT_SPACE(len); 257 kmsg->msg_control += cmlen; 258 kmsg->msg_controllen -= cmlen; 259 return 0; 260 } 261 262 void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm) 263 { 264 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control; 265 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int); 266 int fdnum = scm->fp->count; 267 struct file **fp = scm->fp->fp; 268 int __user *cmfptr; 269 int err = 0, i; 270 271 if (fdnum < fdmax) 272 fdmax = fdnum; 273 274 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) { 275 int new_fd; 276 err = security_file_receive(fp[i]); 277 if (err) 278 break; 279 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags 280 ? O_CLOEXEC : 0); 281 if (err < 0) 282 break; 283 new_fd = err; 284 err = put_user(new_fd, cmfptr); 285 if (err) { 286 put_unused_fd(new_fd); 287 break; 288 } 289 /* Bump the usage count and install the file. */ 290 get_file(fp[i]); 291 fd_install(new_fd, fp[i]); 292 } 293 294 if (i > 0) { 295 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int)); 296 err = put_user(SOL_SOCKET, &cm->cmsg_level); 297 if (!err) 298 err = put_user(SCM_RIGHTS, &cm->cmsg_type); 299 if (!err) 300 err = put_user(cmlen, &cm->cmsg_len); 301 if (!err) { 302 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int)); 303 kmsg->msg_control += cmlen; 304 kmsg->msg_controllen -= cmlen; 305 } 306 } 307 if (i < fdnum) 308 kmsg->msg_flags |= MSG_CTRUNC; 309 310 /* 311 * All of the files that fit in the message have had their 312 * usage counts incremented, so we just free the list. 313 */ 314 __scm_destroy(scm); 315 } 316 317 /* 318 * For now, we assume that the compatibility and native version 319 * of struct ipt_entry are the same - sfr. FIXME 320 */ 321 struct compat_ipt_replace { 322 char name[IPT_TABLE_MAXNAMELEN]; 323 u32 valid_hooks; 324 u32 num_entries; 325 u32 size; 326 u32 hook_entry[NF_IP_NUMHOOKS]; 327 u32 underflow[NF_IP_NUMHOOKS]; 328 u32 num_counters; 329 compat_uptr_t counters; /* struct ipt_counters * */ 330 struct ipt_entry entries[0]; 331 }; 332 333 static int do_netfilter_replace(int fd, int level, int optname, 334 char __user *optval, int optlen) 335 { 336 struct compat_ipt_replace __user *urepl; 337 struct ipt_replace __user *repl_nat; 338 char name[IPT_TABLE_MAXNAMELEN]; 339 u32 origsize, tmp32, num_counters; 340 unsigned int repl_nat_size; 341 int ret; 342 int i; 343 compat_uptr_t ucntrs; 344 345 urepl = (struct compat_ipt_replace __user *)optval; 346 if (get_user(origsize, &urepl->size)) 347 return -EFAULT; 348 349 /* Hack: Causes ipchains to give correct error msg --RR */ 350 if (optlen != sizeof(*urepl) + origsize) 351 return -ENOPROTOOPT; 352 353 /* XXX Assumes that size of ipt_entry is the same both in 354 * native and compat environments. 355 */ 356 repl_nat_size = sizeof(*repl_nat) + origsize; 357 repl_nat = compat_alloc_user_space(repl_nat_size); 358 359 ret = -EFAULT; 360 if (put_user(origsize, &repl_nat->size)) 361 goto out; 362 363 if (!access_ok(VERIFY_READ, urepl, optlen) || 364 !access_ok(VERIFY_WRITE, repl_nat, optlen)) 365 goto out; 366 367 if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) || 368 __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name))) 369 goto out; 370 371 if (__get_user(tmp32, &urepl->valid_hooks) || 372 __put_user(tmp32, &repl_nat->valid_hooks)) 373 goto out; 374 375 if (__get_user(tmp32, &urepl->num_entries) || 376 __put_user(tmp32, &repl_nat->num_entries)) 377 goto out; 378 379 if (__get_user(num_counters, &urepl->num_counters) || 380 __put_user(num_counters, &repl_nat->num_counters)) 381 goto out; 382 383 if (__get_user(ucntrs, &urepl->counters) || 384 __put_user(compat_ptr(ucntrs), &repl_nat->counters)) 385 goto out; 386 387 if (__copy_in_user(&repl_nat->entries[0], 388 &urepl->entries[0], 389 origsize)) 390 goto out; 391 392 for (i = 0; i < NF_IP_NUMHOOKS; i++) { 393 if (__get_user(tmp32, &urepl->hook_entry[i]) || 394 __put_user(tmp32, &repl_nat->hook_entry[i]) || 395 __get_user(tmp32, &urepl->underflow[i]) || 396 __put_user(tmp32, &repl_nat->underflow[i])) 397 goto out; 398 } 399 400 /* 401 * Since struct ipt_counters just contains two u_int64_t members 402 * we can just do the access_ok check here and pass the (converted) 403 * pointer into the standard syscall. We hope that the pointer is 404 * not misaligned ... 405 */ 406 if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs), 407 num_counters * sizeof(struct ipt_counters))) 408 goto out; 409 410 411 ret = sys_setsockopt(fd, level, optname, 412 (char __user *)repl_nat, repl_nat_size); 413 414 out: 415 return ret; 416 } 417 418 /* 419 * A struct sock_filter is architecture independent. 420 */ 421 struct compat_sock_fprog { 422 u16 len; 423 compat_uptr_t filter; /* struct sock_filter * */ 424 }; 425 426 static int do_set_attach_filter(struct socket *sock, int level, int optname, 427 char __user *optval, int optlen) 428 { 429 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval; 430 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog)); 431 compat_uptr_t ptr; 432 u16 len; 433 434 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) || 435 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) || 436 __get_user(len, &fprog32->len) || 437 __get_user(ptr, &fprog32->filter) || 438 __put_user(len, &kfprog->len) || 439 __put_user(compat_ptr(ptr), &kfprog->filter)) 440 return -EFAULT; 441 442 return sock_setsockopt(sock, level, optname, (char __user *)kfprog, 443 sizeof(struct sock_fprog)); 444 } 445 446 static int do_set_sock_timeout(struct socket *sock, int level, 447 int optname, char __user *optval, int optlen) 448 { 449 struct compat_timeval __user *up = (struct compat_timeval __user *) optval; 450 struct timeval ktime; 451 mm_segment_t old_fs; 452 int err; 453 454 if (optlen < sizeof(*up)) 455 return -EINVAL; 456 if (!access_ok(VERIFY_READ, up, sizeof(*up)) || 457 __get_user(ktime.tv_sec, &up->tv_sec) || 458 __get_user(ktime.tv_usec, &up->tv_usec)) 459 return -EFAULT; 460 old_fs = get_fs(); 461 set_fs(KERNEL_DS); 462 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime)); 463 set_fs(old_fs); 464 465 return err; 466 } 467 468 static int compat_sock_setsockopt(struct socket *sock, int level, int optname, 469 char __user *optval, int optlen) 470 { 471 if (optname == SO_ATTACH_FILTER) 472 return do_set_attach_filter(sock, level, optname, 473 optval, optlen); 474 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 475 return do_set_sock_timeout(sock, level, optname, optval, optlen); 476 477 return sock_setsockopt(sock, level, optname, optval, optlen); 478 } 479 480 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname, 481 char __user *optval, int optlen) 482 { 483 int err; 484 struct socket *sock; 485 486 if (level == SOL_IPV6 && optname == IPT_SO_SET_REPLACE) 487 return do_netfilter_replace(fd, level, optname, 488 optval, optlen); 489 490 if (optlen < 0) 491 return -EINVAL; 492 493 if ((sock = sockfd_lookup(fd, &err))!=NULL) 494 { 495 err = security_socket_setsockopt(sock,level,optname); 496 if (err) { 497 sockfd_put(sock); 498 return err; 499 } 500 501 if (level == SOL_SOCKET) 502 err = compat_sock_setsockopt(sock, level, 503 optname, optval, optlen); 504 else if (sock->ops->compat_setsockopt) 505 err = sock->ops->compat_setsockopt(sock, level, 506 optname, optval, optlen); 507 else 508 err = sock->ops->setsockopt(sock, level, 509 optname, optval, optlen); 510 sockfd_put(sock); 511 } 512 return err; 513 } 514 515 static int do_get_sock_timeout(struct socket *sock, int level, int optname, 516 char __user *optval, int __user *optlen) 517 { 518 struct compat_timeval __user *up; 519 struct timeval ktime; 520 mm_segment_t old_fs; 521 int len, err; 522 523 up = (struct compat_timeval __user *) optval; 524 if (get_user(len, optlen)) 525 return -EFAULT; 526 if (len < sizeof(*up)) 527 return -EINVAL; 528 len = sizeof(ktime); 529 old_fs = get_fs(); 530 set_fs(KERNEL_DS); 531 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len); 532 set_fs(old_fs); 533 534 if (!err) { 535 if (put_user(sizeof(*up), optlen) || 536 !access_ok(VERIFY_WRITE, up, sizeof(*up)) || 537 __put_user(ktime.tv_sec, &up->tv_sec) || 538 __put_user(ktime.tv_usec, &up->tv_usec)) 539 err = -EFAULT; 540 } 541 return err; 542 } 543 544 static int compat_sock_getsockopt(struct socket *sock, int level, int optname, 545 char __user *optval, int __user *optlen) 546 { 547 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO) 548 return do_get_sock_timeout(sock, level, optname, optval, optlen); 549 return sock_getsockopt(sock, level, optname, optval, optlen); 550 } 551 552 int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp) 553 { 554 struct compat_timeval __user *ctv = 555 (struct compat_timeval __user*) userstamp; 556 int err = -ENOENT; 557 struct timeval tv; 558 559 if (!sock_flag(sk, SOCK_TIMESTAMP)) 560 sock_enable_timestamp(sk); 561 tv = ktime_to_timeval(sk->sk_stamp); 562 if (tv.tv_sec == -1) 563 return err; 564 if (tv.tv_sec == 0) { 565 sk->sk_stamp = ktime_get_real(); 566 tv = ktime_to_timeval(sk->sk_stamp); 567 } 568 err = 0; 569 if (put_user(tv.tv_sec, &ctv->tv_sec) || 570 put_user(tv.tv_usec, &ctv->tv_usec)) 571 err = -EFAULT; 572 return err; 573 } 574 EXPORT_SYMBOL(compat_sock_get_timestamp); 575 576 int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp) 577 { 578 struct compat_timespec __user *ctv = 579 (struct compat_timespec __user*) userstamp; 580 int err = -ENOENT; 581 struct timespec ts; 582 583 if (!sock_flag(sk, SOCK_TIMESTAMP)) 584 sock_enable_timestamp(sk); 585 ts = ktime_to_timespec(sk->sk_stamp); 586 if (ts.tv_sec == -1) 587 return err; 588 if (ts.tv_sec == 0) { 589 sk->sk_stamp = ktime_get_real(); 590 ts = ktime_to_timespec(sk->sk_stamp); 591 } 592 err = 0; 593 if (put_user(ts.tv_sec, &ctv->tv_sec) || 594 put_user(ts.tv_nsec, &ctv->tv_nsec)) 595 err = -EFAULT; 596 return err; 597 } 598 EXPORT_SYMBOL(compat_sock_get_timestampns); 599 600 asmlinkage long compat_sys_getsockopt(int fd, int level, int optname, 601 char __user *optval, int __user *optlen) 602 { 603 int err; 604 struct socket *sock; 605 606 if ((sock = sockfd_lookup(fd, &err))!=NULL) 607 { 608 err = security_socket_getsockopt(sock, level, 609 optname); 610 if (err) { 611 sockfd_put(sock); 612 return err; 613 } 614 615 if (level == SOL_SOCKET) 616 err = compat_sock_getsockopt(sock, level, 617 optname, optval, optlen); 618 else if (sock->ops->compat_getsockopt) 619 err = sock->ops->compat_getsockopt(sock, level, 620 optname, optval, optlen); 621 else 622 err = sock->ops->getsockopt(sock, level, 623 optname, optval, optlen); 624 sockfd_put(sock); 625 } 626 return err; 627 } 628 /* Argument list sizes for compat_sys_socketcall */ 629 #define AL(x) ((x) * sizeof(u32)) 630 static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), 631 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), 632 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)}; 633 #undef AL 634 635 asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags) 636 { 637 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 638 } 639 640 asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags) 641 { 642 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT); 643 } 644 645 asmlinkage long compat_sys_socketcall(int call, u32 __user *args) 646 { 647 int ret; 648 u32 a[6]; 649 u32 a0, a1; 650 651 if (call < SYS_SOCKET || call > SYS_RECVMSG) 652 return -EINVAL; 653 if (copy_from_user(a, args, nas[call])) 654 return -EFAULT; 655 a0 = a[0]; 656 a1 = a[1]; 657 658 switch (call) { 659 case SYS_SOCKET: 660 ret = sys_socket(a0, a1, a[2]); 661 break; 662 case SYS_BIND: 663 ret = sys_bind(a0, compat_ptr(a1), a[2]); 664 break; 665 case SYS_CONNECT: 666 ret = sys_connect(a0, compat_ptr(a1), a[2]); 667 break; 668 case SYS_LISTEN: 669 ret = sys_listen(a0, a1); 670 break; 671 case SYS_ACCEPT: 672 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2])); 673 break; 674 case SYS_GETSOCKNAME: 675 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2])); 676 break; 677 case SYS_GETPEERNAME: 678 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2])); 679 break; 680 case SYS_SOCKETPAIR: 681 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3])); 682 break; 683 case SYS_SEND: 684 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]); 685 break; 686 case SYS_SENDTO: 687 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]); 688 break; 689 case SYS_RECV: 690 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]); 691 break; 692 case SYS_RECVFROM: 693 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5])); 694 break; 695 case SYS_SHUTDOWN: 696 ret = sys_shutdown(a0,a1); 697 break; 698 case SYS_SETSOCKOPT: 699 ret = compat_sys_setsockopt(a0, a1, a[2], 700 compat_ptr(a[3]), a[4]); 701 break; 702 case SYS_GETSOCKOPT: 703 ret = compat_sys_getsockopt(a0, a1, a[2], 704 compat_ptr(a[3]), compat_ptr(a[4])); 705 break; 706 case SYS_SENDMSG: 707 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]); 708 break; 709 case SYS_RECVMSG: 710 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]); 711 break; 712 default: 713 ret = -EINVAL; 714 break; 715 } 716 return ret; 717 } 718