Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/linux_stats.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 1994-1995 Søren 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: releng/5.4/sys/compat/linux/linux_stats.c 142899 2005-03-01 10:08:11Z obrien $"); 31 32 #include "opt_mac.h" 33 34 #include <sys/param.h> 35 #include <sys/conf.h> 36 #include <sys/dirent.h> 37 #include <sys/file.h> 38 #include <sys/filedesc.h> 39 #include <sys/proc.h> 40 #include <sys/mac.h> 41 #include <sys/malloc.h> 42 #include <sys/mount.h> 43 #include <sys/namei.h> 44 #include <sys/stat.h> 45 #include <sys/systm.h> 46 #include <sys/vnode.h> 47 48 #include "opt_compat.h" 49 50 #ifdef COMPAT_LINUX32 51 #include <machine/../linux32/linux.h> 52 #include <machine/../linux32/linux32_proto.h> 53 #else 54 #include <machine/../linux/linux.h> 55 #include <machine/../linux/linux_proto.h> 56 #endif 57 58 #include <compat/linux/linux_util.h> 59 60 static int 61 newstat_copyout(struct stat *buf, void *ubuf) 62 { 63 struct l_newstat tbuf; 64 struct cdevsw *cdevsw; 65 struct cdev *dev; 66 67 bzero(&tbuf, sizeof(tbuf)); 68 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 69 tbuf.st_ino = buf->st_ino; 70 tbuf.st_mode = buf->st_mode; 71 tbuf.st_nlink = buf->st_nlink; 72 tbuf.st_uid = buf->st_uid; 73 tbuf.st_gid = buf->st_gid; 74 tbuf.st_rdev = buf->st_rdev; 75 tbuf.st_size = buf->st_size; 76 tbuf.st_atime = buf->st_atime; 77 tbuf.st_mtime = buf->st_mtime; 78 tbuf.st_ctime = buf->st_ctime; 79 tbuf.st_blksize = buf->st_blksize; 80 tbuf.st_blocks = buf->st_blocks; 81 82 /* Lie about disk drives which are character devices 83 * in FreeBSD but block devices under Linux. 84 */ 85 if (S_ISCHR(tbuf.st_mode) && 86 (dev = findcdev(buf->st_rdev)) != NULL) { 87 cdevsw = devsw(dev); 88 if (cdevsw != NULL && (cdevsw->d_flags & D_DISK)) { 89 tbuf.st_mode &= ~S_IFMT; 90 tbuf.st_mode |= S_IFBLK; 91 92 /* XXX this may not be quite right */ 93 /* Map major number to 0 */ 94 tbuf.st_dev = uminor(buf->st_dev) & 0xf; 95 tbuf.st_rdev = buf->st_rdev & 0xff; 96 } 97 } 98 99 return (copyout(&tbuf, ubuf, sizeof(tbuf))); 100 } 101 102 int 103 linux_newstat(struct thread *td, struct linux_newstat_args *args) 104 { 105 struct stat buf; 106 struct nameidata nd; 107 char *path; 108 int error; 109 110 LCONVPATHEXIST(td, args->path, &path); 111 112 #ifdef DEBUG 113 if (ldebug(newstat)) 114 printf(ARGS(newstat, "%s, *"), path); 115 #endif 116 117 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_SYSSPACE, path, td); 118 error = namei(&nd); 119 LFREEPATH(path); 120 if (error) 121 return (error); 122 NDFREE(&nd, NDF_ONLY_PNBUF); 123 124 error = vn_stat(nd.ni_vp, &buf, td->td_ucred, NOCRED, td); 125 vput(nd.ni_vp); 126 if (error) 127 return (error); 128 129 return (newstat_copyout(&buf, args->buf)); 130 } 131 132 int 133 linux_newlstat(struct thread *td, struct linux_newlstat_args *args) 134 { 135 int error; 136 struct stat sb; 137 struct nameidata nd; 138 char *path; 139 140 LCONVPATHEXIST(td, args->path, &path); 141 142 #ifdef DEBUG 143 if (ldebug(newlstat)) 144 printf(ARGS(newlstat, "%s, *"), path); 145 #endif 146 147 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_SYSSPACE, path, 148 td); 149 error = namei(&nd); 150 LFREEPATH(path); 151 if (error) 152 return (error); 153 NDFREE(&nd, NDF_ONLY_PNBUF); 154 155 error = vn_stat(nd.ni_vp, &sb, td->td_ucred, NOCRED, td); 156 vput(nd.ni_vp); 157 if (error) 158 return (error); 159 160 return (newstat_copyout(&sb, args->buf)); 161 } 162 163 int 164 linux_newfstat(struct thread *td, struct linux_newfstat_args *args) 165 { 166 struct file *fp; 167 struct stat buf; 168 int error; 169 170 #ifdef DEBUG 171 if (ldebug(newfstat)) 172 printf(ARGS(newfstat, "%d, *"), args->fd); 173 #endif 174 175 if ((error = fget(td, args->fd, &fp)) != 0) 176 return (error); 177 178 error = fo_stat(fp, &buf, td->td_ucred, td); 179 fdrop(fp, td); 180 if (!error) 181 error = newstat_copyout(&buf, args->buf); 182 183 return (error); 184 } 185 186 /* XXX - All fields of type l_int are defined as l_long on i386 */ 187 struct l_statfs { 188 l_int f_type; 189 l_int f_bsize; 190 l_int f_blocks; 191 l_int f_bfree; 192 l_int f_bavail; 193 l_int f_files; 194 l_int f_ffree; 195 l_fsid_t f_fsid; 196 l_int f_namelen; 197 l_int f_spare[6]; 198 }; 199 200 #define LINUX_CODA_SUPER_MAGIC 0x73757245L 201 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L 202 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L 203 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L 204 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L 205 #define LINUX_NCP_SUPER_MAGIC 0x564cL 206 #define LINUX_NFS_SUPER_MAGIC 0x6969L 207 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL 208 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L 209 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */ 210 211 static long 212 bsd_to_linux_ftype(const char *fstypename) 213 { 214 int i; 215 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = { 216 {"ufs", LINUX_UFS_SUPER_MAGIC}, 217 {"cd9660", LINUX_ISOFS_SUPER_MAGIC}, 218 {"nfs", LINUX_NFS_SUPER_MAGIC}, 219 {"ext2fs", LINUX_EXT2_SUPER_MAGIC}, 220 {"procfs", LINUX_PROC_SUPER_MAGIC}, 221 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC}, 222 {"ntfs", LINUX_NTFS_SUPER_MAGIC}, 223 {"nwfs", LINUX_NCP_SUPER_MAGIC}, 224 {"hpfs", LINUX_HPFS_SUPER_MAGIC}, 225 {"coda", LINUX_CODA_SUPER_MAGIC}, 226 {NULL, 0L}}; 227 228 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++) 229 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0) 230 return (b2l_tbl[i].linux_type); 231 232 return (0L); 233 } 234 235 int 236 linux_statfs(struct thread *td, struct linux_statfs_args *args) 237 { 238 struct mount *mp; 239 struct nameidata *ndp; 240 struct statfs *bsd_statfs; 241 struct nameidata nd; 242 struct l_statfs linux_statfs; 243 char *path; 244 int error; 245 246 LCONVPATHEXIST(td, args->path, &path); 247 248 #ifdef DEBUG 249 if (ldebug(statfs)) 250 printf(ARGS(statfs, "%s, *"), path); 251 #endif 252 ndp = &nd; 253 NDINIT(ndp, LOOKUP, FOLLOW, UIO_SYSSPACE, path, td); 254 error = namei(ndp); 255 LFREEPATH(path); 256 if (error) 257 return error; 258 NDFREE(ndp, NDF_ONLY_PNBUF); 259 mp = ndp->ni_vp->v_mount; 260 bsd_statfs = &mp->mnt_stat; 261 vrele(ndp->ni_vp); 262 #ifdef MAC 263 error = mac_check_mount_stat(td->td_ucred, mp); 264 if (error) 265 return (error); 266 #endif 267 error = VFS_STATFS(mp, bsd_statfs, td); 268 if (error) 269 return error; 270 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 271 linux_statfs.f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 272 linux_statfs.f_bsize = bsd_statfs->f_bsize; 273 linux_statfs.f_blocks = bsd_statfs->f_blocks; 274 linux_statfs.f_bfree = bsd_statfs->f_bfree; 275 linux_statfs.f_bavail = bsd_statfs->f_bavail; 276 linux_statfs.f_ffree = bsd_statfs->f_ffree; 277 linux_statfs.f_files = bsd_statfs->f_files; 278 if (suser(td)) { 279 linux_statfs.f_fsid.val[0] = 0; 280 linux_statfs.f_fsid.val[1] = 0; 281 } else { 282 linux_statfs.f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 283 linux_statfs.f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 284 } 285 linux_statfs.f_namelen = MAXNAMLEN; 286 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 287 } 288 289 int 290 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args) 291 { 292 struct file *fp; 293 struct mount *mp; 294 struct statfs *bsd_statfs; 295 struct l_statfs linux_statfs; 296 int error; 297 298 #ifdef DEBUG 299 if (ldebug(fstatfs)) 300 printf(ARGS(fstatfs, "%d, *"), args->fd); 301 #endif 302 error = getvnode(td->td_proc->p_fd, args->fd, &fp); 303 if (error) 304 return error; 305 mp = fp->f_vnode->v_mount; 306 #ifdef MAC 307 error = mac_check_mount_stat(td->td_ucred, mp); 308 if (error) { 309 fdrop(fp, td); 310 return (error); 311 } 312 #endif 313 bsd_statfs = &mp->mnt_stat; 314 error = VFS_STATFS(mp, bsd_statfs, td); 315 if (error) { 316 fdrop(fp, td); 317 return error; 318 } 319 bsd_statfs->f_flags = mp->mnt_flag & MNT_VISFLAGMASK; 320 linux_statfs.f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename); 321 linux_statfs.f_bsize = bsd_statfs->f_bsize; 322 linux_statfs.f_blocks = bsd_statfs->f_blocks; 323 linux_statfs.f_bfree = bsd_statfs->f_bfree; 324 linux_statfs.f_bavail = bsd_statfs->f_bavail; 325 linux_statfs.f_ffree = bsd_statfs->f_ffree; 326 linux_statfs.f_files = bsd_statfs->f_files; 327 if (suser(td)) { 328 linux_statfs.f_fsid.val[0] = 0; 329 linux_statfs.f_fsid.val[1] = 0; 330 } else { 331 linux_statfs.f_fsid.val[0] = bsd_statfs->f_fsid.val[0]; 332 linux_statfs.f_fsid.val[1] = bsd_statfs->f_fsid.val[1]; 333 } 334 linux_statfs.f_namelen = MAXNAMLEN; 335 error = copyout(&linux_statfs, args->buf, sizeof(linux_statfs)); 336 fdrop(fp, td); 337 return error; 338 } 339 340 struct l_ustat 341 { 342 l_daddr_t f_tfree; 343 l_ino_t f_tinode; 344 char f_fname[6]; 345 char f_fpack[6]; 346 }; 347 348 int 349 linux_ustat(struct thread *td, struct linux_ustat_args *args) 350 { 351 struct l_ustat lu; 352 struct cdev *dev; 353 struct vnode *vp; 354 struct statfs *stat; 355 int error; 356 357 #ifdef DEBUG 358 if (ldebug(ustat)) 359 printf(ARGS(ustat, "%d, *"), args->dev); 360 #endif 361 362 /* 363 * lu.f_fname and lu.f_fpack are not used. They are always zeroed. 364 * lu.f_tinode and lu.f_tfree are set from the device's super block. 365 */ 366 bzero(&lu, sizeof(lu)); 367 368 /* 369 * XXX - Don't return an error if we can't find a vnode for the 370 * device. Our struct cdev *is 32-bits whereas Linux only has a 16-bits 371 * struct cdev *. The struct cdev *that is used now may as well be a truncated 372 * struct cdev *returned from previous syscalls. Just return a bzeroed 373 * ustat in that case. 374 * 375 * XXX: findcdev() SHALL not be used this way. Somebody (TM) will 376 * have to find a better way. It may be that we should stick 377 * a dev_t into struct mount, and walk the mountlist for a 378 * perfect match and failing that try again looking for a 379 * minor-truncated match. 380 */ 381 dev = findcdev(makedev(args->dev >> 8, args->dev & 0xFF)); 382 if (dev != NULL && vfinddev(dev, &vp)) { 383 if (vp->v_mount == NULL) 384 return (EINVAL); 385 #ifdef MAC 386 error = mac_check_mount_stat(td->td_ucred, vp->v_mount); 387 if (error) 388 return (error); 389 #endif 390 stat = &(vp->v_mount->mnt_stat); 391 error = VFS_STATFS(vp->v_mount, stat, td); 392 if (error) 393 return (error); 394 395 lu.f_tfree = stat->f_bfree; 396 lu.f_tinode = stat->f_ffree; 397 } 398 399 return (copyout(&lu, args->ubuf, sizeof(lu))); 400 } 401 402 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32)) 403 404 static int 405 stat64_copyout(struct stat *buf, void *ubuf) 406 { 407 struct l_stat64 lbuf; 408 struct cdevsw *cdevsw; 409 struct cdev *dev; 410 411 bzero(&lbuf, sizeof(lbuf)); 412 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8); 413 lbuf.st_ino = buf->st_ino; 414 lbuf.st_mode = buf->st_mode; 415 lbuf.st_nlink = buf->st_nlink; 416 lbuf.st_uid = buf->st_uid; 417 lbuf.st_gid = buf->st_gid; 418 lbuf.st_rdev = buf->st_rdev; 419 lbuf.st_size = buf->st_size; 420 lbuf.st_atime = buf->st_atime; 421 lbuf.st_mtime = buf->st_mtime; 422 lbuf.st_ctime = buf->st_ctime; 423 lbuf.st_blksize = buf->st_blksize; 424 lbuf.st_blocks = buf->st_blocks; 425 426 /* Lie about disk drives which are character devices 427 * in FreeBSD but block devices under Linux. 428 */ 429 if (S_ISCHR(lbuf.st_mode) && 430 (dev = findcdev(buf->st_rdev)) != NULL) { 431 cdevsw = devsw(dev); 432 if (cdevsw != NULL && (cdevsw->d_flags & D_DISK)) { 433 lbuf.st_mode &= ~S_IFMT; 434 lbuf.st_mode |= S_IFBLK; 435 436 /* XXX this may not be quite right */ 437 /* Map major number to 0 */ 438 lbuf.st_dev = uminor(buf->st_dev) & 0xf; 439 lbuf.st_rdev = buf->st_rdev & 0xff; 440 } 441 } 442 443 /* 444 * The __st_ino field makes all the difference. In the Linux kernel 445 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO, 446 * but without the assignment to __st_ino the runtime linker refuses 447 * to mmap(2) any shared libraries. I guess it's broken alright :-) 448 */ 449 lbuf.__st_ino = buf->st_ino; 450 451 return (copyout(&lbuf, ubuf, sizeof(lbuf))); 452 } 453 454 int 455 linux_stat64(struct thread *td, struct linux_stat64_args *args) 456 { 457 struct stat buf; 458 struct nameidata nd; 459 int error; 460 char *filename; 461 462 LCONVPATHEXIST(td, args->filename, &filename); 463 464 #ifdef DEBUG 465 if (ldebug(stat64)) 466 printf(ARGS(stat64, "%s, *"), filename); 467 #endif 468 469 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_SYSSPACE, filename, 470 td); 471 error = namei(&nd); 472 LFREEPATH(filename); 473 if (error) 474 return (error); 475 NDFREE(&nd, NDF_ONLY_PNBUF); 476 477 error = vn_stat(nd.ni_vp, &buf, td->td_ucred, NOCRED, td); 478 vput(nd.ni_vp); 479 if (error) 480 return (error); 481 482 return (stat64_copyout(&buf, args->statbuf)); 483 } 484 485 int 486 linux_lstat64(struct thread *td, struct linux_lstat64_args *args) 487 { 488 int error; 489 struct stat sb; 490 struct nameidata nd; 491 char *filename; 492 493 LCONVPATHEXIST(td, args->filename, &filename); 494 495 #ifdef DEBUG 496 if (ldebug(lstat64)) 497 printf(ARGS(lstat64, "%s, *"), args->filename); 498 #endif 499 500 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF | NOOBJ, UIO_SYSSPACE, filename, 501 td); 502 error = namei(&nd); 503 LFREEPATH(filename); 504 if (error) 505 return (error); 506 NDFREE(&nd, NDF_ONLY_PNBUF); 507 508 error = vn_stat(nd.ni_vp, &sb, td->td_ucred, NOCRED, td); 509 vput(nd.ni_vp); 510 if (error) 511 return (error); 512 513 return (stat64_copyout(&sb, args->statbuf)); 514 } 515 516 int 517 linux_fstat64(struct thread *td, struct linux_fstat64_args *args) 518 { 519 struct filedesc *fdp; 520 struct file *fp; 521 struct stat buf; 522 int error; 523 524 #ifdef DEBUG 525 if (ldebug(fstat64)) 526 printf(ARGS(fstat64, "%d, *"), args->fd); 527 #endif 528 529 fdp = td->td_proc->p_fd; 530 if ((unsigned)args->fd >= fdp->fd_nfiles || 531 (fp = fdp->fd_ofiles[args->fd]) == NULL) 532 return (EBADF); 533 534 error = fo_stat(fp, &buf, td->td_ucred, td); 535 if (!error) 536 error = stat64_copyout(&buf, args->statbuf); 537 538 return (error); 539 } 540 541 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
Cache object: 7f239cf4a4e28dea687fceb931461320
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]