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/6.3/sys/compat/linux/linux_stats.c 174447 2007-12-08 13:43:48Z dwmalone $");
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/mac.h>
42 #include <sys/malloc.h>
43 #include <sys/mount.h>
44 #include <sys/namei.h>
45 #include <sys/stat.h>
46 #include <sys/syscallsubr.h>
47 #include <sys/systm.h>
48 #include <sys/vnode.h>
49 #include <sys/conf.h>
50 #include <sys/fcntl.h>
51
52 #ifdef COMPAT_LINUX32
53 #include <machine/../linux32/linux.h>
54 #include <machine/../linux32/linux32_proto.h>
55 #else
56 #include <machine/../linux/linux.h>
57 #include <machine/../linux/linux_proto.h>
58 #endif
59
60 #include <compat/linux/linux_util.h>
61
62 /*
63 * XXX: This was removed from newstat_copyout(), and almost identical
64 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced
65 * XXX: with something that does lookup and locking properly.
66 * XXX: When somebody fixes this: please try to avoid duplicating it.
67 */
68 #if 0
69 static void
70 disk_foo(struct somestat *tbuf)
71 {
72 struct cdevsw *cdevsw;
73 struct cdev *dev;
74
75 /* Lie about disk drives which are character devices
76 * in FreeBSD but block devices under Linux.
77 */
78 if (S_ISCHR(tbuf.st_mode) &&
79 (dev = findcdev(buf->st_rdev)) != NULL) {
80 cdevsw = dev_refthread(dev);
81 if (cdevsw != NULL) {
82 if (cdevsw->d_flags & D_DISK) {
83 tbuf.st_mode &= ~S_IFMT;
84 tbuf.st_mode |= S_IFBLK;
85
86 /* XXX this may not be quite right */
87 /* Map major number to 0 */
88 tbuf.st_dev = uminor(buf->st_dev) & 0xf;
89 tbuf.st_rdev = buf->st_rdev & 0xff;
90 }
91 dev_relthread(dev);
92 }
93 }
94
95 }
96 #endif
97
98 static void
99 translate_fd_major_minor(struct thread *td, int fd, struct stat *buf)
100 {
101 struct file *fp;
102 int error;
103 int major, minor;
104
105 if ((error = fget(td, fd, &fp)) != 0)
106 return;
107 if (fp->f_vnode) {
108 if (fp->f_vnode->v_type == VCHR
109 || fp->f_vnode->v_type == VBLK) {
110 if (fp->f_vnode->v_un.vu_cdev) {
111 if (linux_driver_get_major_minor(
112 fp->f_vnode->v_un.vu_cdev->si_name,
113 &major, &minor) == 0) {
114 buf->st_rdev = (major << 8 | minor);
115 }
116 }
117 }
118 }
119 fdrop(fp, td);
120 }
121
122 static void
123 translate_path_major_minor(struct thread *td, char *path, struct stat *buf)
124 {
125 struct proc *p = td->td_proc;
126 struct filedesc *fdp = p->p_fd;
127 struct file *fp;
128 int fd;
129 int temp;
130
131 temp = td->td_retval[0];
132 if (kern_open(td, path, UIO_SYSSPACE, O_RDONLY, 0) != 0)
133 return;
134 fd = td->td_retval[0];
135 td->td_retval[0] = temp;
136 translate_fd_major_minor(td, fd, buf);
137 FILEDESC_LOCK(fdp);
138 fp = fdp->fd_ofiles[fd];
139 FILEDESC_UNLOCK(fdp);
140 fdclose(fdp, fdp->fd_ofiles[fd], fd, td);
141 }
142
143 static int
144 newstat_copyout(struct stat *buf, void *ubuf)
145 {
146 struct l_newstat tbuf;
147
148 bzero(&tbuf, sizeof(tbuf));
149 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
150 tbuf.st_ino = buf->st_ino;
151 tbuf.st_mode = buf->st_mode;
152 tbuf.st_nlink = buf->st_nlink;
153 tbuf.st_uid = buf->st_uid;
154 tbuf.st_gid = buf->st_gid;
155 tbuf.st_rdev = buf->st_rdev;
156 tbuf.st_size = buf->st_size;
157 tbuf.st_atime = buf->st_atime;
158 tbuf.st_mtime = buf->st_mtime;
159 tbuf.st_ctime = buf->st_ctime;
160 tbuf.st_blksize = buf->st_blksize;
161 tbuf.st_blocks = buf->st_blocks;
162
163 return (copyout(&tbuf, ubuf, sizeof(tbuf)));
164 }
165
166 int
167 linux_newstat(struct thread *td, struct linux_newstat_args *args)
168 {
169 struct stat buf;
170 char *path;
171 int error;
172
173 LCONVPATHEXIST(td, args->path, &path);
174
175 #ifdef DEBUG
176 if (ldebug(newstat))
177 printf(ARGS(newstat, "%s, *"), path);
178 #endif
179
180 error = kern_stat(td, path, UIO_SYSSPACE, &buf);
181 if (!error && strlen(path) > strlen("/dev/pts/") &&
182 !strncmp(path, "/dev/pts/", strlen("/dev/pts/"))
183 && path[9] >= '' && path[9] <= '9') {
184 /*
185 * Linux checks major and minors of the slave device to make
186 * sure it's a pty device, so let's make him believe it is.
187 */
188 buf.st_rdev = (136 << 8);
189 }
190
191 translate_path_major_minor(td, path, &buf);
192
193 LFREEPATH(path);
194 if (error)
195 return (error);
196 return (newstat_copyout(&buf, args->buf));
197 }
198
199 int
200 linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
201 {
202 struct stat sb;
203 char *path;
204 int error;
205
206 LCONVPATHEXIST(td, args->path, &path);
207
208 #ifdef DEBUG
209 if (ldebug(newlstat))
210 printf(ARGS(newlstat, "%s, *"), path);
211 #endif
212
213 error = kern_lstat(td, path, UIO_SYSSPACE, &sb);
214 if (!error)
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 #define LINUX_CODA_SUPER_MAGIC 0x73757245L
317 #define LINUX_EXT2_SUPER_MAGIC 0xEF53L
318 #define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
319 #define LINUX_ISOFS_SUPER_MAGIC 0x9660L
320 #define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
321 #define LINUX_NCP_SUPER_MAGIC 0x564cL
322 #define LINUX_NFS_SUPER_MAGIC 0x6969L
323 #define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
324 #define LINUX_PROC_SUPER_MAGIC 0x9fa0L
325 #define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
326 #define LINUX_DEVFS_SUPER_MAGIC 0x1373L
327
328 static long
329 bsd_to_linux_ftype(const char *fstypename)
330 {
331 int i;
332 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
333 {"ufs", LINUX_UFS_SUPER_MAGIC},
334 {"cd9660", LINUX_ISOFS_SUPER_MAGIC},
335 {"nfs", LINUX_NFS_SUPER_MAGIC},
336 {"ext2fs", LINUX_EXT2_SUPER_MAGIC},
337 {"procfs", LINUX_PROC_SUPER_MAGIC},
338 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
339 {"ntfs", LINUX_NTFS_SUPER_MAGIC},
340 {"nwfs", LINUX_NCP_SUPER_MAGIC},
341 {"hpfs", LINUX_HPFS_SUPER_MAGIC},
342 {"coda", LINUX_CODA_SUPER_MAGIC},
343 {"devfs", LINUX_DEVFS_SUPER_MAGIC},
344 {NULL, 0L}};
345
346 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
347 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
348 return (b2l_tbl[i].linux_type);
349
350 return (0L);
351 }
352
353 static void
354 bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
355 {
356
357 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
358 linux_statfs->f_bsize = bsd_statfs->f_bsize;
359 linux_statfs->f_blocks = bsd_statfs->f_blocks;
360 linux_statfs->f_bfree = bsd_statfs->f_bfree;
361 linux_statfs->f_bavail = bsd_statfs->f_bavail;
362 linux_statfs->f_ffree = bsd_statfs->f_ffree;
363 linux_statfs->f_files = bsd_statfs->f_files;
364 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
365 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
366 linux_statfs->f_namelen = MAXNAMLEN;
367 }
368
369 int
370 linux_statfs(struct thread *td, struct linux_statfs_args *args)
371 {
372 struct l_statfs linux_statfs;
373 struct statfs bsd_statfs;
374 char *path;
375 int error;
376
377 LCONVPATHEXIST(td, args->path, &path);
378
379 #ifdef DEBUG
380 if (ldebug(statfs))
381 printf(ARGS(statfs, "%s, *"), path);
382 #endif
383 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
384 LFREEPATH(path);
385 if (error)
386 return (error);
387 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
388 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
389 }
390
391 static void
392 bsd_to_linux_statfs64(struct statfs *bsd_statfs, struct l_statfs64 *linux_statfs)
393 {
394
395 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
396 linux_statfs->f_bsize = bsd_statfs->f_bsize;
397 linux_statfs->f_blocks = bsd_statfs->f_blocks;
398 linux_statfs->f_bfree = bsd_statfs->f_bfree;
399 linux_statfs->f_bavail = bsd_statfs->f_bavail;
400 linux_statfs->f_ffree = bsd_statfs->f_ffree;
401 linux_statfs->f_files = bsd_statfs->f_files;
402 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
403 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
404 linux_statfs->f_namelen = MAXNAMLEN;
405 }
406
407 int
408 linux_statfs64(struct thread *td, struct linux_statfs64_args *args)
409 {
410 struct l_statfs64 linux_statfs;
411 struct statfs bsd_statfs;
412 char *path;
413 int error;
414
415 if (args->bufsize != sizeof(struct l_statfs64))
416 return EINVAL;
417
418 LCONVPATHEXIST(td, args->path, &path);
419
420 #ifdef DEBUG
421 if (ldebug(statfs64))
422 printf(ARGS(statfs64, "%s, *"), path);
423 #endif
424 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
425 LFREEPATH(path);
426 if (error)
427 return (error);
428 bsd_to_linux_statfs64(&bsd_statfs, &linux_statfs);
429 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
430 }
431
432 int
433 linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
434 {
435 struct l_statfs linux_statfs;
436 struct statfs bsd_statfs;
437 int error;
438
439 #ifdef DEBUG
440 if (ldebug(fstatfs))
441 printf(ARGS(fstatfs, "%d, *"), args->fd);
442 #endif
443 error = kern_fstatfs(td, args->fd, &bsd_statfs);
444 if (error)
445 return error;
446 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
447 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
448 }
449
450 struct l_ustat
451 {
452 l_daddr_t f_tfree;
453 l_ino_t f_tinode;
454 char f_fname[6];
455 char f_fpack[6];
456 };
457
458 int
459 linux_ustat(struct thread *td, struct linux_ustat_args *args)
460 {
461 #ifdef DEBUG
462 if (ldebug(ustat))
463 printf(ARGS(ustat, "%d, *"), args->dev);
464 #endif
465
466 return (EOPNOTSUPP);
467 }
468
469 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
470
471 static int
472 stat64_copyout(struct stat *buf, void *ubuf)
473 {
474 struct l_stat64 lbuf;
475
476 bzero(&lbuf, sizeof(lbuf));
477 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
478 lbuf.st_ino = buf->st_ino;
479 lbuf.st_mode = buf->st_mode;
480 lbuf.st_nlink = buf->st_nlink;
481 lbuf.st_uid = buf->st_uid;
482 lbuf.st_gid = buf->st_gid;
483 lbuf.st_rdev = buf->st_rdev;
484 lbuf.st_size = buf->st_size;
485 lbuf.st_atime = buf->st_atime;
486 lbuf.st_mtime = buf->st_mtime;
487 lbuf.st_ctime = buf->st_ctime;
488 lbuf.st_blksize = buf->st_blksize;
489 lbuf.st_blocks = buf->st_blocks;
490
491 /*
492 * The __st_ino field makes all the difference. In the Linux kernel
493 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
494 * but without the assignment to __st_ino the runtime linker refuses
495 * to mmap(2) any shared libraries. I guess it's broken alright :-)
496 */
497 lbuf.__st_ino = buf->st_ino;
498
499 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
500 }
501
502 int
503 linux_stat64(struct thread *td, struct linux_stat64_args *args)
504 {
505 struct stat buf;
506 char *filename;
507 int error;
508
509 LCONVPATHEXIST(td, args->filename, &filename);
510
511 #ifdef DEBUG
512 if (ldebug(stat64))
513 printf(ARGS(stat64, "%s, *"), filename);
514 #endif
515
516 error = kern_stat(td, filename, UIO_SYSSPACE, &buf);
517 if (!error) {
518 if (strlen(filename) > strlen("/dev/pts/") &&
519 !strncmp(filename, "/dev/pts/", strlen("/dev/pts/")) &&
520 filename[9] >= '' && filename[9] <= '9') {
521 /*
522 * Linux checks major and minors of the slave device
523 * to make sure it's a pty deivce, so let's make him
524 * believe it is.
525 */
526 buf.st_rdev = (136 << 8);
527 } else
528 translate_path_major_minor(td, filename, &buf);
529 }
530 LFREEPATH(filename);
531 if (error)
532 return (error);
533 return (stat64_copyout(&buf, args->statbuf));
534 }
535
536 int
537 linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
538 {
539 struct stat sb;
540 char *filename;
541 int error;
542
543 LCONVPATHEXIST(td, args->filename, &filename);
544
545 #ifdef DEBUG
546 if (ldebug(lstat64))
547 printf(ARGS(lstat64, "%s, *"), args->filename);
548 #endif
549
550 error = kern_lstat(td, filename, UIO_SYSSPACE, &sb);
551 if (!error)
552 translate_path_major_minor(td, filename, &sb);
553 LFREEPATH(filename);
554 if (error)
555 return (error);
556 return (stat64_copyout(&sb, args->statbuf));
557 }
558
559 int
560 linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
561 {
562 struct stat buf;
563 int error;
564
565 #ifdef DEBUG
566 if (ldebug(fstat64))
567 printf(ARGS(fstat64, "%d, *"), args->fd);
568 #endif
569
570 error = kern_fstat(td, args->fd, &buf);
571 translate_fd_major_minor(td, args->fd, &buf);
572 if (!error)
573 error = stat64_copyout(&buf, args->statbuf);
574
575 return (error);
576 }
577
578 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
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