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 major, minor; 104 105 if ((!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) || 106 fget(td, fd, &fp) != 0) 107 return; 108 if (fp->f_vnode != NULL && 109 fp->f_vnode->v_un.vu_cdev != NULL && 110 linux_driver_get_major_minor(fp->f_vnode->v_un.vu_cdev->si_name, 111 &major, &minor) == 0) 112 buf->st_rdev = (major << 8 | minor); 113 fdrop(fp, td); 114 } 115 116 static void 117 translate_path_major_minor(struct thread *td, char *path, struct stat *buf) 118 { 119 struct proc *p = td->td_proc; 120 struct filedesc *fdp = p->p_fd; 121 int fd; 122 int temp; 123 124 if (!S_ISCHR(buf->st_mode) && !S_ISBLK(buf->st_mode)) 125 return; 126 temp = td->td_retval[0]; 127 if (kern_open(td, path, UIO_SYSSPACE, O_RDONLY, 0) != 0) 128 return; 129 fd = td->td_retval[0]; 130 td->td_retval[0] = temp; 131 translate_fd_major_minor(td, fd, buf); 132 fdclose(fdp, fdp->fd_ofiles[fd], fd, td); 133 } 134 135 static int 136 newstat_copyout(struct stat *buf, void *ubuf) 137 { 138 struct l_newstat tbuf; 139 140 bzero(&tbuf, sizeof(tbuf)); 141 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 142 tbuf.st_ino = buf->st_ino; 143 tbuf.st_mode = buf->st_mode; 144 tbuf.st_nlink = buf->st_nlink; 145 tbuf.st_uid = buf->st_uid; 146 tbuf.st_gid = buf->st_gid; 147 tbuf.st_rdev = buf->st_rdev; 148 tbuf.st_size = buf->st_size; 149 tbuf.st_atime = buf->st_atime; 150 tbuf.st_mtime = buf->st_mtime; 151 tbuf.st_ctime = buf->st_ctime; 152 tbuf.st_blksize = buf->st_blksize; 153 tbuf.st_blocks = buf->st_blocks; 154 155 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 156 } 157 158 int 159 linux_newstat(struct thread *td, struct linux_newstat_args *args) 160 { 161 struct stat buf; 162 char *path; 163 int error; 164 165 LCONVPATHEXIST(td, args->path, &path); 166 167 #ifdef DEBUG 168 if (ldebug(newstat)) 169 printf(ARGS(newstat, "%s, *"), path); 170 #endif 171 172 error = kern_stat(td, path, UIO_SYSSPACE, &buf); 173 if (!error) { 174 if (strlen(path) > strlen("/dev/pts/") && 175 !strncmp(path, "/dev/pts/", strlen("/dev/pts/")) && 176 path[9] >= '0' && path[9] <= '9') { 177 /* 178 * Linux checks major and minors of the slave device 179 * to make sure it's a pty device, so let's make him 180 * believe it is. 181 */ 182 buf.st_rdev = (136 << 8); 183 } else 184 translate_path_major_minor(td, path, &buf); 185 } 186 LFREEPATH(path); 187 if (error) 188 return (error); 189 return (newstat_copyout(&buf, args->buf)); 190 } 191 192 int 193 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 194 { 195 struct stat sb; 196 char *path; 197 int error; 198 199 LCONVPATHEXIST(td, args->path, &path); 200 201 #ifdef DEBUG 202 if (ldebug(newlstat)) 203 printf(ARGS(newlstat, "%s, *"), path); 204 #endif 205 206 error = kern_lstat(td, path, UIO_SYSSPACE, &sb); 207 if (!error) 208 translate_path_major_minor(td, path, &sb); 209 LFREEPATH(path); 210 if (error) 211 return (error); 212 return (newstat_copyout(&sb, args->buf)); 213 } 214 215 int 216 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 217 { 218 struct stat buf; 219 int error; 220 221 #ifdef DEBUG 222 if (ldebug(newfstat)) 223 printf(ARGS(newfstat, "%d, *"), args->fd); 224 #endif 225 226 error = kern_fstat(td, args->fd, &buf); 227 translate_fd_major_minor(td, args->fd, &buf); 228 if (!error) 229 error = newstat_copyout(&buf, args->buf); 230 231 return (error); 232 } 233 234 static int 235 stat_copyout(struct stat *buf, void *ubuf) 236 { 237 struct l_stat lbuf; 238 239 bzero(&lbuf, sizeof(lbuf)); 240 lbuf.st_dev = buf->st_dev; 241 lbuf.st_ino = buf->st_ino; 242 lbuf.st_mode = buf->st_mode; 243 lbuf.st_nlink = buf->st_nlink; 244 lbuf.st_uid = buf->st_uid; 245 lbuf.st_gid = buf->st_gid; 246 lbuf.st_rdev = buf->st_rdev; 247 if (buf->st_size < (quad_t)1 << 32) 248 lbuf.st_size = buf->st_size; 249 else 250 lbuf.st_size = -2; 251 lbuf.st_atime = buf->st_atime; 252 lbuf.st_mtime = buf->st_mtime; 253 lbuf.st_ctime = buf->st_ctime; 254 lbuf.st_blksize = buf->st_blksize; 255 lbuf.st_blocks = buf->st_blocks; 256 lbuf.st_flags = buf->st_flags; 257 lbuf.st_gen = buf->st_gen; 258 259 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 260 } 261 262 int 263 linux_stat(struct thread *td, struct linux_stat_args *args) 264 { 265 struct stat buf; 266 int error; 267 #ifdef DEBUG 268 if (ldebug(stat)) 269 printf(ARGS(stat, "%s, *"), args->path); 270 #endif 271 error = kern_stat(td, args->path, UIO_SYSSPACE, &buf); 272 if (error) 273 return (error); 274 translate_path_major_minor(td, args->path, &buf); 275 return(stat_copyout(&buf, args->up)); 276 } 277 278 int 279 linux_lstat(struct thread *td, struct linux_lstat_args *args) 280 { 281 struct stat buf; 282 int error; 283 284 #ifdef DEBUG 285 if (ldebug(lstat)) 286 printf(ARGS(lstat, "%s, *"), args->path); 287 #endif 288 error = kern_lstat(td, args->path, UIO_SYSSPACE, &buf); 289 if (error) 290 return (error); 291 translate_path_major_minor(td, args->path, &buf); 292 return(stat_copyout(&buf, args->up)); 293 } 294 295 /* XXX - All fields of type l_int are defined as l_long on i386 */ 296 struct l_statfs { 297 l_int f_type; 298 l_int f_bsize; 299 l_int f_blocks; 300 l_int f_bfree; 301 l_int f_bavail; 302 l_int f_files; 303 l_int f_ffree; 304 l_fsid_t f_fsid; 305 l_int f_namelen; 306 l_int f_spare[6]; 307 }; 308 309 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 310 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 311 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 312 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 313 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 314 #define LINUX_NCP_SUPER_MAGIC 0x564cL 315 #define LINUX_NFS_SUPER_MAGIC 0x6969L 316 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 317 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 318 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 319 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L 320 321 static long 322 bsd_to_linux_ftype(const char *fstypename) 323 { 324 int i; 325 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 326 {"ufs", LINUX_UFS_SUPER_MAGIC}, 327 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 328 {"nfs", LINUX_NFS_SUPER_MAGIC}, 329 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 330 {"procfs", LINUX_PROC_SUPER_MAGIC}, 331 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 332 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 333 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 334 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 335 {"coda", LINUX_CODA_SUPER_MAGIC}, 336 {"devfs", LINUX_DEVFS_SUPER_MAGIC}, 337 {NULL, 0L}}; 338 339 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 340 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 341 return (b2l_tbl[i].linux_type); 342 343 return (0L); 344 } 345 346 static void 347 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs) 348 { 349 350 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 351 linux_statfs->f_bsize = bsd_statfs->f_bsize; 352 linux_statfs->f_blocks = bsd_statfs->f_blocks; 353 linux_statfs->f_bfree = bsd_statfs->f_bfree; 354 linux_statfs->f_bavail = bsd_statfs->f_bavail; 355 linux_statfs->f_ffree = bsd_statfs->f_ffree; 356 linux_statfs->f_files = bsd_statfs->f_files; 357 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 358 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 359 linux_statfs->f_namelen = MAXNAMLEN; 360 } 361 362 int 363 linux_statfs(struct thread *td, struct linux_statfs_args *args) 364 { 365 struct l_statfs linux_statfs; 366 struct statfs bsd_statfs; 367 char *path; 368 int error; 369 370 LCONVPATHEXIST(td, args->path, &path); 371 372 #ifdef DEBUG 373 if (ldebug(statfs)) 374 printf(ARGS(statfs, "%s, *"), path); 375 #endif 376 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 377 LFREEPATH(path); 378 if (error) 379 return (error); 380 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 381 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 382 } 383 384 static void 385 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs) 386 { 387 388 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 389 linux_statfs->f_bsize = bsd_statfs->f_bsize; 390 linux_statfs->f_blocks = bsd_statfs->f_blocks; 391 linux_statfs->f_bfree = bsd_statfs->f_bfree; 392 linux_statfs->f_bavail = bsd_statfs->f_bavail; 393 linux_statfs->f_ffree = bsd_statfs->f_ffree; 394 linux_statfs->f_files = bsd_statfs->f_files; 395 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 396 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 397 linux_statfs->f_namelen = MAXNAMLEN; 398 } 399 400 int 401 linux_statfs64(struct thread *td, struct linux_statfs64_args *args) 402 { 403 struct l_statfs64 linux_statfs; 404 struct statfs bsd_statfs; 405 char *path; 406 int error; 407 408 if (args->bufsize != sizeof(struct l_statfs64)) 409 return EINVAL; 410 411 LCONVPATHEXIST(td, args->path, &path); 412 413 #ifdef DEBUG 414 if (ldebug(statfs64)) 415 printf(ARGS(statfs64, "%s, *"), path); 416 #endif 417 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs); 418 LFREEPATH(path); 419 if (error) 420 return (error); 421 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs); 422 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 423 } 424 425 int 426 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 427 { 428 struct l_statfs linux_statfs; 429 struct statfs bsd_statfs; 430 int error; 431 432 #ifdef DEBUG 433 if (ldebug(fstatfs)) 434 printf(ARGS(fstatfs, "%d, *"), args->fd); 435 #endif 436 error = kern_fstatfs(td, args->fd, &bsd_statfs); 437 if (error) 438 return error; 439 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs); 440 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 441 } 442 443 struct l_ustat 444 { 445 l_daddr_t f_tfree; 446 l_ino_t f_tinode; 447 char f_fname[6]; 448 char f_fpack[6]; 449 }; 450 451 int 452 linux_ustat(struct thread *td, struct linux_ustat_args *args) 453 { 454 #ifdef DEBUG 455 if (ldebug(ustat)) 456 printf(ARGS(ustat, "%d, *"), args->dev); 457 #endif 458 459 return (EOPNOTSUPP); 460 } 461 462 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 463 464 static int 465 stat64_copyout(struct stat *buf, void *ubuf) 466 { 467 struct l_stat64 lbuf; 468 469 bzero(&lbuf, sizeof(lbuf)); 470 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 471 lbuf.st_ino = buf->st_ino; 472 lbuf.st_mode = buf->st_mode; 473 lbuf.st_nlink = buf->st_nlink; 474 lbuf.st_uid = buf->st_uid; 475 lbuf.st_gid = buf->st_gid; 476 lbuf.st_rdev = buf->st_rdev; 477 lbuf.st_size = buf->st_size; 478 lbuf.st_atime = buf->st_atime; 479 lbuf.st_mtime = buf->st_mtime; 480 lbuf.st_ctime = buf->st_ctime; 481 lbuf.st_blksize = buf->st_blksize; 482 lbuf.st_blocks = buf->st_blocks; 483 484 /* 485 * The __st_ino field makes all the difference. In the Linux kernel 486 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 487 * but without the assignment to __st_ino the runtime linker refuses 488 * to mmap(2) any shared libraries. I guess it's broken alright :-) 489 */ 490 lbuf.__st_ino = buf->st_ino; 491 492 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 493 } 494 495 int 496 linux_stat64(struct thread *td, struct linux_stat64_args *args) 497 { 498 struct stat buf; 499 char *filename; 500 int error; 501 502 LCONVPATHEXIST(td, args->filename, &filename); 503 504 #ifdef DEBUG 505 if (ldebug(stat64)) 506 printf(ARGS(stat64, "%s, *"), filename); 507 #endif 508 509 error = kern_stat(td, filename, UIO_SYSSPACE, &buf); 510 if (!error) { 511 if (strlen(filename) > strlen("/dev/pts/") && 512 !strncmp(filename, "/dev/pts/", strlen("/dev/pts/")) && 513 filename[9] >= '0' && filename[9] <= '9') { 514 /* 515 * Linux checks major and minors of the slave device 516 * to make sure it's a pty deivce, so let's make him 517 * believe it is. 518 */ 519 buf.st_rdev = (136 << 8); 520 } else 521 translate_path_major_minor(td, filename, &buf); 522 } 523 LFREEPATH(filename); 524 if (error) 525 return (error); 526 return (stat64_copyout(&buf, args->statbuf)); 527 } 528 529 int 530 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 531 { 532 struct stat sb; 533 char *filename; 534 int error; 535 536 LCONVPATHEXIST(td, args->filename, &filename); 537 538 #ifdef DEBUG 539 if (ldebug(lstat64)) 540 printf(ARGS(lstat64, "%s, *"), args->filename); 541 #endif 542 543 error = kern_lstat(td, filename, UIO_SYSSPACE, &sb); 544 if (!error) 545 translate_path_major_minor(td, filename, &sb); 546 LFREEPATH(filename); 547 if (error) 548 return (error); 549 return (stat64_copyout(&sb, args->statbuf)); 550 } 551 552 int 553 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 554 { 555 struct stat buf; 556 int error; 557 558 #ifdef DEBUG 559 if (ldebug(fstat64)) 560 printf(ARGS(fstat64, "%d, *"), args->fd); 561 #endif 562 563 error = kern_fstat(td, args->fd, &buf); 564 translate_fd_major_minor(td, args->fd, &buf); 565 if (!error) 566 error = stat64_copyout(&buf, args->statbuf); 567 568 return (error); 569 } 570 571 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ 572