1 /*- 2 * Copyright (c) 1994-1995 S�ren Schmidt 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include "opt_compat.h" 33 #include "opt_mac.h" 34 35 #include <sys/param.h> 36 #include <sys/dirent.h> 37 #include <sys/file.h> 38 #include <sys/filedesc.h> 39 #include <sys/proc.h> 40 #include <sys/jail.h> 41 #include <sys/malloc.h> 42 #include <sys/mount.h> 43 #include <sys/namei.h> 44 #include <sys/stat.h> 45 #include <sys/syscallsubr.h> 46 #include <sys/systm.h> 47 #include <sys/vnode.h> 48 #include <sys/conf.h> 49 #include <sys/fcntl.h> 50 51 #ifdef COMPAT_LINUX32 52 #include <machine/../linux32/linux.h> 53 #include <machine/../linux32/linux32_proto.h> 54 #else 55 #include <machine/../linux/linux.h> 56 #include <machine/../linux/linux_proto.h> 57 #endif 58 59 #include <compat/linux/linux_util.h> 60 61 #include <security/mac/mac_framework.h> 62 63 /* 64 * XXX: This was removed from newstat_copyout(), and almost identical 65 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced 66 * XXX: with something that does lookup and locking properly. 67 * XXX: When somebody fixes this: please try to avoid duplicating it. 68 */ 69 #if 0 70 static void 71 disk_foo(struct somestat *tbuf) 72 { 73 struct cdevsw *cdevsw; 74 struct cdev *dev; 75 76 /* Lie about disk drives which are character devices 77 * in FreeBSD but block devices under Linux. 78 */ 79 if (S_ISCHR(tbuf.st_mode) && 80 (dev = findcdev(buf->st_rdev)) != NULL) { 81 cdevsw = dev_refthread(dev); 82 if (cdevsw != NULL) { 83 if (cdevsw->d_flags & D_DISK) { 84 tbuf.st_mode &= ~S_IFMT; 85 tbuf.st_mode |= S_IFBLK; 86 87 /* XXX this may not be quite right */ 88 /* Map major number to 0 */ 89 tbuf.st_dev = uminor(buf->st_dev) & 0xf; 90 tbuf.st_rdev = buf->st_rdev & 0xff; 91 } 92 dev_relthread(dev); 93 } 94 } 95 96 } 97 #endif 98 99 static void 100 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf) 101 { 102 struct file *fp; 103 int error; 104 int major, minor; 105 106 if ((error = fget(td, fd, &fp)) != 0) 107 return; 108 if (fp->f_vnode) { 109 if (fp->f_vnode->v_type == VCHR 110 || fp->f_vnode->v_type == VBLK) { 111 if (fp->f_vnode->v_un.vu_cdev) { 112 if (linux_driver_get_major_minor( 113 fp->f_vnode->v_un.vu_cdev->si_name, 114 &major, &minor) == 0) { 115 buf->st_rdev = (major << 8 | minor); 116 } 117 } 118 } 119 } 120 fdrop(fp, td); 121 } 122 123 static void 124 translate_path_major_minor(struct thread *td, char *path, struct stat *buf) 125 { 126 struct proc *p = td->td_proc; 127 struct filedesc *fdp = p->p_fd; 128 struct file *fp; 129 int fd; 130 int temp; 131 132 temp = td->td_retval[0]; 133 if (kern_open(td, path, UIO_SYSSPACE, O_RDONLY, 0) != 0) 134 return; 135 fd = td->td_retval[0]; 136 td->td_retval[0] = temp; 137 translate_fd_major_minor(td, fd, buf); 138 FILEDESC_LOCK(fdp); 139 fp = fdp->fd_ofiles[fd]; 140 FILEDESC_UNLOCK(fdp); 141 fdclose(fdp, fdp->fd_ofiles[fd], fd, td); 142 } 143 144 static int 145 newstat_copyout(struct stat *buf, void *ubuf) 146 { 147 struct l_newstat tbuf; 148 149 bzero(&tbuf, sizeof(tbuf)); 150 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 151 tbuf.st_ino = buf->st_ino; 152 tbuf.st_mode = buf->st_mode; 153 tbuf.st_nlink = buf->st_nlink; 154 tbuf.st_uid = buf->st_uid; 155 tbuf.st_gid = buf->st_gid; 156 tbuf.st_rdev = buf->st_rdev; 157 tbuf.st_size = buf->st_size; 158 tbuf.st_atime = buf->st_atime; 159 tbuf.st_mtime = buf->st_mtime; 160 tbuf.st_ctime = buf->st_ctime; 161 tbuf.st_blksize = buf->st_blksize; 162 tbuf.st_blocks = buf->st_blocks; 163 164 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 165 } 166 167 int 168 linux_newstat(struct thread *td, struct linux_newstat_args *args) 169 { 170 struct stat buf; 171 char *path; 172 int error; 173 174 LCONVPATHEXIST(td, args->path, &path); 175 176 #ifdef DEBUG 177 if (ldebug(newstat)) 178 printf(ARGS(newstat, "%s, *"), path); 179 #endif 180 181 error = kern_stat(td, path, UIO_SYSSPACE, &buf); 182 if (!error && strlen(path) > strlen("/dev/pts/") && 183 !strncmp(path, "/dev/pts/", strlen("/dev/pts/")) 184 && path[9] >= '0' && path[9] <= '9') { 185 /* 186 * Linux checks major and minors of the slave device to make 187 * sure it's a pty device, so let's make him believe it is. 188 */ 189 buf.st_rdev = (136 << 8); 190 } 191 192 translate_path_major_minor(td, path, &buf); 193 194 LFREEPATH(path); 195 if (error) 196 return (error); 197 return (newstat_copyout(&buf, args->buf)); 198 } 199 200 int 201 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 202 { 203 struct stat sb; 204 char *path; 205 int error; 206 207 LCONVPATHEXIST(td, args->path, &path); 208 209 #ifdef DEBUG 210 if (ldebug(newlstat)) 211 printf(ARGS(newlstat, "%s, *"), path); 212 #endif 213 214 error = kern_lstat(td, path, UIO_SYSSPACE, &sb); 215 translate_path_major_minor(td, path, &sb); 216 LFREEPATH(path); 217 if (error) 218 return (error); 219 return (newstat_copyout(&sb, args->buf)); 220 } 221 222 int 223 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 224 { 225 struct stat buf; 226 int error; 227 228 #ifdef DEBUG 229 if (ldebug(newfstat)) 230 printf(ARGS(newfstat, "%d, *"), args->fd); 231 #endif 232 233 error = kern_fstat(td, args->fd, &buf); 234 translate_fd_major_minor(td, args->fd, &buf); 235 if (!error) 236 error = newstat_copyout(&buf, args->buf); 237 238 return (error); 239 } 240 241 static int 242 stat_copyout(struct stat *buf, void *ubuf) 243 { 244 struct l_stat lbuf; 245 246 bzero(&lbuf, sizeof(lbuf)); 247 lbuf.st_dev = buf->st_dev; 248 lbuf.st_ino = buf->st_ino; 249 lbuf.st_mode = buf->st_mode; 250 lbuf.st_nlink = buf->st_nlink; 251 lbuf.st_uid = buf->st_uid; 252 lbuf.st_gid = buf->st_gid; 253 lbuf.st_rdev = buf->st_rdev; 254 if (buf->st_size < (quad_t)1 << 32) 255 lbuf.st_size = buf->st_size; 256 else 257 lbuf.st_size = -2; 258 lbuf.st_atime = buf->st_atime; 259 lbuf.st_mtime = buf->st_mtime; 260 lbuf.st_ctime = buf->st_ctime; 261 lbuf.st_blksize = buf->st_blksize; 262 lbuf.st_blocks = buf->st_blocks; 263 lbuf.st_flags = buf->st_flags; 264 lbuf.st_gen = buf->st_gen; 265 266 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 267 } 268 269 int 270 linux_stat(struct thread *td, struct linux_stat_args *args) 271 { 272 struct stat buf; 273 int error; 274 #ifdef DEBUG 275 if (ldebug(stat)) 276 printf(ARGS(stat, "%s, *"), args->path); 277 #endif 278 error = kern_stat(td, args->path, UIO_SYSSPACE, &buf); 279 if (error) 280 return (error); 281 translate_path_major_minor(td, args->path, &buf); 282 return(stat_copyout(&buf, args->up)); 283 } 284 285 int 286 linux_lstat(struct thread *td, struct linux_lstat_args *args) 287 { 288 struct stat buf; 289 int error; 290 291 #ifdef DEBUG 292 if (ldebug(lstat)) 293 printf(ARGS(lstat, "%s, *"), args->path); 294 #endif 295 error = kern_lstat(td, args->path, UIO_SYSSPACE, &buf); 296 if (error) 297 return (error); 298 translate_path_major_minor(td, args->path, &buf); 299 return(stat_copyout(&buf, args->up)); 300 } 301 302 /* XXX - All fields of type l_int are defined as l_long on i386 */ 303 struct l_statfs { 304 l_int f_type; 305 l_int f_bsize; 306 l_int f_blocks; 307 l_int f_bfree; 308 l_int f_bavail; 309 l_int f_files; 310 l_int f_ffree; 311 l_fsid_t f_fsid; 312 l_int f_namelen; 313 l_int f_spare[6]; 314 }; 315 316 struct l_statfs64 { 317 l_int f_type; 318 l_int f_bsize; 319 uint64_t f_blocks; 320 uint64_t f_bfree; 321 uint64_t f_bavail; 322 uint64_t f_files; 323 uint64_t f_ffree; 324 l_fsid_t f_fsid; 325 l_int f_namelen; 326 l_int f_spare[6]; 327 }; 328 329 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 330 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 331 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 332 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 333 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 334 #define LINUX_NCP_SUPER_MAGIC 0x564cL 335 #define LINUX_NFS_SUPER_MAGIC 0x6969L 336 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 337 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 338 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 339 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 340 341 static long 342 bsd_to_linux_ftype(const char *fstypename) 343 { 344 int i; 345 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 346 {"ufs", LINUX_UFS_SUPER_MAGIC}, 347 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 348 {"nfs", LINUX_NFS_SUPER_MAGIC}, 349 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 350 {"procfs", LINUX_PROC_SUPER_MAGIC}, 351 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 352 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 353 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 354 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 355 {"coda", LINUX_CODA_SUPER_MAGIC}, 356 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 357 {NULL, 0L}}; 358 359 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 360 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 361 return (b2l_tbl[i].linux_type); 362 363 return (0L); 364 } 365 366 static void 367 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 368 { 369 370 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 371 linux_statfs->f_bsize = bsd_statfs->f_bsize; 372 linux_statfs->f_blocks = bsd_statfs->f_blocks; 373 linux_statfs->f_bfree = bsd_statfs->f_bfree; 374 linux_statfs->f_bavail = bsd_statfs->f_bavail; 375 linux_statfs->f_ffree = bsd_statfs->f_ffree; 376 linux_statfs->f_files = bsd_statfs->f_files; 377 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 378 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 379 linux_statfs->f_namelen = MAXNAMLEN; 380 } 381 382 int 383 linux_statfs(struct thread *td, struct linux_statfs_args *args) 384 { 385 struct l_statfs linux_statfs; 386 struct statfs bsd_statfs; 387 char *path; 388 int error; 389 390 LCONVPATHEXIST(td, args->path, &path); 391 392 #ifdef DEBUG 393 if (ldebug(statfs)) 394 printf(ARGS(statfs, "%s, *"), path); 395 #endif 396 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 397 LFREEPATH(path); 398 if (error) 399 return (error); 400 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 401 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 402 } 403 404 static void 405 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 406 { 407 408 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 409 linux_statfs->f_bsize = bsd_statfs->f_bsize; 410 linux_statfs->f_blocks = bsd_statfs->f_blocks; 411 linux_statfs->f_bfree = bsd_statfs->f_bfree; 412 linux_statfs->f_bavail = bsd_statfs->f_bavail; 413 linux_statfs->f_ffree = bsd_statfs->f_ffree; 414 linux_statfs->f_files = bsd_statfs->f_files; 415 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 416 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 417 linux_statfs->f_namelen = MAXNAMLEN; 418 } 419 420 int 421 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 422 { 423 struct l_statfs64 linux_statfs; 424 struct statfs bsd_statfs; 425 char *path; 426 int error; 427 428 LCONVPATHEXIST(td, args->path, &path); 429 430 #ifdef DEBUG 431 if (ldebug(statfs64)) 432 printf(ARGS(statfs64, "%s, *"), path); 433 #endif 434 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 435 LFREEPATH(path); 436 if (error) 437 return (error); 438 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs); 439 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 440 } 441 442 int 443 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 444 { 445 struct l_statfs linux_statfs; 446 struct statfs bsd_statfs; 447 int error; 448 449 #ifdef DEBUG 450 if (ldebug(fstatfs)) 451 printf(ARGS(fstatfs, "%d, *"), args->fd); 452 #endif 453 error = kern_fstatfs(td, args->fd, &bsd_statfs); 454 if (error) 455 return error; 456 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 457 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 458 } 459 460 struct l_ustat 461 { 462 l_daddr_t f_tfree; 463 l_ino_t f_tinode; 464 char f_fname[6]; 465 char f_fpack[6]; 466 }; 467 468 int 469 linux_ustat(struct thread *td, struct linux_ustat_args *args) 470 { 471 #ifdef DEBUG 472 if (ldebug(ustat)) 473 printf(ARGS(ustat, "%d, *"), args->dev); 474 #endif 475 476 return (EOPNOTSUPP); 477 } 478 479 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 480 481 static int 482 stat64_copyout(struct stat *buf, void *ubuf) 483 { 484 struct l_stat64 lbuf; 485 486 bzero(&lbuf, sizeof(lbuf)); 487 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 488 lbuf.st_ino = buf->st_ino; 489 lbuf.st_mode = buf->st_mode; 490 lbuf.st_nlink = buf->st_nlink; 491 lbuf.st_uid = buf->st_uid; 492 lbuf.st_gid = buf->st_gid; 493 lbuf.st_rdev = buf->st_rdev; 494 lbuf.st_size = buf->st_size; 495 lbuf.st_atime = buf->st_atime; 496 lbuf.st_mtime = buf->st_mtime; 497 lbuf.st_ctime = buf->st_ctime; 498 lbuf.st_blksize = buf->st_blksize; 499 lbuf.st_blocks = buf->st_blocks; 500 501 /* 502 * The __st_ino field makes all the difference. In the Linux kernel 503 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 504 * but without the assignment to __st_ino the runtime linker refuses 505 * to mmap(2) any shared libraries. I guess it's broken alright :-) 506 */ 507 lbuf.__st_ino = buf->st_ino; 508 509 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 510 } 511 512 int 513 linux_stat64(struct thread *td, struct linux_stat64_args *args) 514 { 515 struct stat buf; 516 char *filename; 517 int error; 518 519 LCONVPATHEXIST(td, args->filename, &filename); 520 521 #ifdef DEBUG 522 if (ldebug(stat64)) 523 printf(ARGS(stat64, "%s, *"), filename); 524 #endif 525 526 error = kern_stat(td, filename, UIO_SYSSPACE, &buf); 527 if (!error && strlen(filename) > strlen("/dev/pts/") && 528 !strncmp(filename, "/dev/pts/", strlen("/dev/pts/")) 529 && filename[9] >= '0' && filename[9] <= '9') { 530 /* 531 * Linux checks major and minors of the slave device to make 532 * sure it's a pty deivce, so let's make him believe it is. 533 */ 534 buf.st_rdev = (136 << 8); 535 } 536 537 translate_path_major_minor(td, filename, &buf); 538 539 LFREEPATH(filename); 540 if (error) 541 return (error); 542 return (stat64_copyout(&buf, args->statbuf)); 543 } 544 545 int 546 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 547 { 548 struct stat sb; 549 char *filename; 550 int error; 551 552 LCONVPATHEXIST(td, args->filename, &filename); 553 554 #ifdef DEBUG 555 if (ldebug(lstat64)) 556 printf(ARGS(lstat64, "%s, *"), args->filename); 557 #endif 558 559 error = kern_lstat(td, filename, UIO_SYSSPACE, &sb); 560 translate_path_major_minor(td, filename, &sb); 561 LFREEPATH(filename); 562 if (error) 563 return (error); 564 return (stat64_copyout(&sb, args->statbuf)); 565 } 566 567 int 568 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 569 { 570 struct stat buf; 571 int error; 572 573 #ifdef DEBUG 574 if (ldebug(fstat64)) 575 printf(ARGS(fstat64, "%d, *"), args->fd); 576 #endif 577 578 error = kern_fstat(td, args->fd, &buf); 579 translate_fd_major_minor(td, args->fd, &buf); 580 if (!error) 581 error = stat64_copyout(&buf, args->statbuf); 582 583 return (error); 584 } 585 586 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 587