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: head/sys/compat/linux/linux_stats.c 155382 2006-02-06 10:10:42Z jeff $");
31
32#include "opt_mac.h"
33
34#include <sys/param.h>
35#include <sys/dirent.h>
36#include <sys/file.h>
37#include <sys/filedesc.h>
38#include <sys/proc.h>
39#include <sys/jail.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/syscallsubr.h>
46#include <sys/systm.h>
47#include <sys/vnode.h>
48
49#include "opt_compat.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/*
62 * XXX: This was removed from newstat_copyout(), and almost identical
63 * XXX: code was in stat64_copyout(). findcdev() needs to be replaced
64 * XXX: with something that does lookup and locking properly.
65 * XXX: When somebody fixes this: please try to avoid duplicating it.
66 */
67#if 0
68static void
69disk_foo(struct somestat *tbuf)
70{
71 struct cdevsw *cdevsw;
72 struct cdev *dev;
73
74 /* Lie about disk drives which are character devices
75 * in FreeBSD but block devices under Linux.
76 */
77 if (S_ISCHR(tbuf.st_mode) &&
78 (dev = findcdev(buf->st_rdev)) != NULL) {
79 cdevsw = dev_refthread(dev);
80 if (cdevsw != NULL) {
81 if (cdevsw->d_flags & D_DISK) {
82 tbuf.st_mode &= ~S_IFMT;
83 tbuf.st_mode |= S_IFBLK;
84
85 /* XXX this may not be quite right */
86 /* Map major number to 0 */
87 tbuf.st_dev = uminor(buf->st_dev) & 0xf;
88 tbuf.st_rdev = buf->st_rdev & 0xff;
89 }
90 dev_relthread(dev);
91 }
92 }
93
94}
95#endif
96
97static int
98newstat_copyout(struct stat *buf, void *ubuf)
99{
100 struct l_newstat tbuf;
101
102 bzero(&tbuf, sizeof(tbuf));
103 tbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
104 tbuf.st_ino = buf->st_ino;
105 tbuf.st_mode = buf->st_mode;
106 tbuf.st_nlink = buf->st_nlink;
107 tbuf.st_uid = buf->st_uid;
108 tbuf.st_gid = buf->st_gid;
109 tbuf.st_rdev = buf->st_rdev;
110 tbuf.st_size = buf->st_size;
111 tbuf.st_atime = buf->st_atime;
112 tbuf.st_mtime = buf->st_mtime;
113 tbuf.st_ctime = buf->st_ctime;
114 tbuf.st_blksize = buf->st_blksize;
115 tbuf.st_blocks = buf->st_blocks;
116
117 return (copyout(&tbuf, ubuf, sizeof(tbuf)));
118}
119
120int
121linux_newstat(struct thread *td, struct linux_newstat_args *args)
122{
123 struct stat buf;
124 char *path;
125 int error;
126
127 LCONVPATHEXIST(td, args->path, &path);
128
129#ifdef DEBUG
130 if (ldebug(newstat))
131 printf(ARGS(newstat, "%s, *"), path);
132#endif
133
134 error = kern_stat(td, path, UIO_SYSSPACE, &buf);
135 if (!error && strlen(path) > strlen("/dev/pts/") &&
136 !strncmp(path, "/dev/pts/", strlen("/dev/pts/"))
137 && path[9] >= '0' && path[9] <= '9') {
138 /*
139 * Linux checks major and minors of the slave device to make
140 * sure it's a pty device, so let's make him believe it is.
141 */
142 buf.st_rdev = (136 << 8);
143 }
144
145 LFREEPATH(path);
146 if (error)
147 return (error);
148 return (newstat_copyout(&buf, args->buf));
149}
150
151int
152linux_newlstat(struct thread *td, struct linux_newlstat_args *args)
153{
154 struct stat sb;
155 char *path;
156 int error;
157
158 LCONVPATHEXIST(td, args->path, &path);
159
160#ifdef DEBUG
161 if (ldebug(newlstat))
162 printf(ARGS(newlstat, "%s, *"), path);
163#endif
164
165 error = kern_lstat(td, path, UIO_SYSSPACE, &sb);
166 LFREEPATH(path);
167 if (error)
168 return (error);
169 return (newstat_copyout(&sb, args->buf));
170}
171
172int
173linux_newfstat(struct thread *td, struct linux_newfstat_args *args)
174{
175 struct stat buf;
176 int error;
177
178#ifdef DEBUG
179 if (ldebug(newfstat))
180 printf(ARGS(newfstat, "%d, *"), args->fd);
181#endif
182
183 error = kern_fstat(td, args->fd, &buf);
184 if (!error)
185 error = newstat_copyout(&buf, args->buf);
186
187 return (error);
188}
189
190/* XXX - All fields of type l_int are defined as l_long on i386 */
191struct l_statfs {
192 l_int f_type;
193 l_int f_bsize;
194 l_int f_blocks;
195 l_int f_bfree;
196 l_int f_bavail;
197 l_int f_files;
198 l_int f_ffree;
199 l_fsid_t f_fsid;
200 l_int f_namelen;
201 l_int f_spare[6];
202};
203
204#define LINUX_CODA_SUPER_MAGIC 0x73757245L
205#define LINUX_EXT2_SUPER_MAGIC 0xEF53L
206#define LINUX_HPFS_SUPER_MAGIC 0xf995e849L
207#define LINUX_ISOFS_SUPER_MAGIC 0x9660L
208#define LINUX_MSDOS_SUPER_MAGIC 0x4d44L
209#define LINUX_NCP_SUPER_MAGIC 0x564cL
210#define LINUX_NFS_SUPER_MAGIC 0x6969L
211#define LINUX_NTFS_SUPER_MAGIC 0x5346544EL
212#define LINUX_PROC_SUPER_MAGIC 0x9fa0L
213#define LINUX_UFS_SUPER_MAGIC 0x00011954L /* XXX - UFS_MAGIC in Linux */
214#define LINUX_DEVFS_SUPER_MAGIC 0x1373L
215
216static long
217bsd_to_linux_ftype(const char *fstypename)
218{
219 int i;
220 static struct {const char *bsd_name; long linux_type;} b2l_tbl[] = {
221 {"ufs", LINUX_UFS_SUPER_MAGIC},
222 {"cd9660", LINUX_ISOFS_SUPER_MAGIC},
223 {"nfs", LINUX_NFS_SUPER_MAGIC},
224 {"ext2fs", LINUX_EXT2_SUPER_MAGIC},
225 {"procfs", LINUX_PROC_SUPER_MAGIC},
226 {"msdosfs", LINUX_MSDOS_SUPER_MAGIC},
227 {"ntfs", LINUX_NTFS_SUPER_MAGIC},
228 {"nwfs", LINUX_NCP_SUPER_MAGIC},
229 {"hpfs", LINUX_HPFS_SUPER_MAGIC},
230 {"coda", LINUX_CODA_SUPER_MAGIC},
231 {"devfs", LINUX_DEVFS_SUPER_MAGIC},
232 {NULL, 0L}};
233
234 for (i = 0; b2l_tbl[i].bsd_name != NULL; i++)
235 if (strcmp(b2l_tbl[i].bsd_name, fstypename) == 0)
236 return (b2l_tbl[i].linux_type);
237
238 return (0L);
239}
240
241static void
242bsd_to_linux_statfs(struct statfs *bsd_statfs, struct l_statfs *linux_statfs)
243{
244
245 linux_statfs->f_type = bsd_to_linux_ftype(bsd_statfs->f_fstypename);
246 linux_statfs->f_bsize = bsd_statfs->f_bsize;
247 linux_statfs->f_blocks = bsd_statfs->f_blocks;
248 linux_statfs->f_bfree = bsd_statfs->f_bfree;
249 linux_statfs->f_bavail = bsd_statfs->f_bavail;
250 linux_statfs->f_ffree = bsd_statfs->f_ffree;
251 linux_statfs->f_files = bsd_statfs->f_files;
252 linux_statfs->f_fsid.val[0] = bsd_statfs->f_fsid.val[0];
253 linux_statfs->f_fsid.val[1] = bsd_statfs->f_fsid.val[1];
254 linux_statfs->f_namelen = MAXNAMLEN;
255}
256
257int
258linux_statfs(struct thread *td, struct linux_statfs_args *args)
259{
260 struct l_statfs linux_statfs;
261 struct statfs bsd_statfs;
262 char *path;
263 int error;
264
265 LCONVPATHEXIST(td, args->path, &path);
266
267#ifdef DEBUG
268 if (ldebug(statfs))
269 printf(ARGS(statfs, "%s, *"), path);
270#endif
271 error = kern_statfs(td, path, UIO_SYSSPACE, &bsd_statfs);
272 LFREEPATH(path);
273 if (error)
274 return (error);
275 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
276 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
277}
278
279int
280linux_fstatfs(struct thread *td, struct linux_fstatfs_args *args)
281{
282 struct l_statfs linux_statfs;
283 struct statfs bsd_statfs;
284 int error;
285
286#ifdef DEBUG
287 if (ldebug(fstatfs))
288 printf(ARGS(fstatfs, "%d, *"), args->fd);
289#endif
290 error = kern_fstatfs(td, args->fd, &bsd_statfs);
291 if (error)
292 return error;
293 bsd_to_linux_statfs(&bsd_statfs, &linux_statfs);
294 return copyout(&linux_statfs, args->buf, sizeof(linux_statfs));
295}
296
297struct l_ustat
298{
299 l_daddr_t f_tfree;
300 l_ino_t f_tinode;
301 char f_fname[6];
302 char f_fpack[6];
303};
304
305int
306linux_ustat(struct thread *td, struct linux_ustat_args *args)
307{
308#ifdef DEBUG
309 if (ldebug(ustat))
310 printf(ARGS(ustat, "%d, *"), args->dev);
311#endif
312
313 return (EOPNOTSUPP);
314}
315
316#if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
317
318static int
319stat64_copyout(struct stat *buf, void *ubuf)
320{
321 struct l_stat64 lbuf;
322
323 bzero(&lbuf, sizeof(lbuf));
324 lbuf.st_dev = uminor(buf->st_dev) | (umajor(buf->st_dev) << 8);
325 lbuf.st_ino = buf->st_ino;
326 lbuf.st_mode = buf->st_mode;
327 lbuf.st_nlink = buf->st_nlink;
328 lbuf.st_uid = buf->st_uid;
329 lbuf.st_gid = buf->st_gid;
330 lbuf.st_rdev = buf->st_rdev;
331 lbuf.st_size = buf->st_size;
332 lbuf.st_atime = buf->st_atime;
333 lbuf.st_mtime = buf->st_mtime;
334 lbuf.st_ctime = buf->st_ctime;
335 lbuf.st_blksize = buf->st_blksize;
336 lbuf.st_blocks = buf->st_blocks;
337
338 /*
339 * The __st_ino field makes all the difference. In the Linux kernel
340 * it is conditionally compiled based on STAT64_HAS_BROKEN_ST_INO,
341 * but without the assignment to __st_ino the runtime linker refuses
342 * to mmap(2) any shared libraries. I guess it's broken alright :-)
343 */
344 lbuf.__st_ino = buf->st_ino;
345
346 return (copyout(&lbuf, ubuf, sizeof(lbuf)));
347}
348
349int
350linux_stat64(struct thread *td, struct linux_stat64_args *args)
351{
352 struct stat buf;
353 char *filename;
354 int error;
355
356 LCONVPATHEXIST(td, args->filename, &filename);
357
358#ifdef DEBUG
359 if (ldebug(stat64))
360 printf(ARGS(stat64, "%s, *"), filename);
361#endif
362
363 error = kern_stat(td, filename, UIO_SYSSPACE, &buf);
364 if (!error && strlen(filename) > strlen("/dev/pts/") &&
365 !strncmp(filename, "/dev/pts/", strlen("/dev/pts/"))
366 && filename[9] >= '0' && filename[9] <= '9') {
367 /*
368 * Linux checks major and minors of the slave device to make
369 * sure it's a pty deivce, so let's make him believe it is.
370 */
371 buf.st_rdev = (136 << 8);
372 }
373
374 LFREEPATH(filename);
375 if (error)
376 return (error);
377 return (stat64_copyout(&buf, args->statbuf));
378}
379
380int
381linux_lstat64(struct thread *td, struct linux_lstat64_args *args)
382{
383 struct stat sb;
384 char *filename;
385 int error;
386
387 LCONVPATHEXIST(td, args->filename, &filename);
388
389#ifdef DEBUG
390 if (ldebug(lstat64))
391 printf(ARGS(lstat64, "%s, *"), args->filename);
392#endif
393
394 error = kern_lstat(td, filename, UIO_SYSSPACE, &sb);
395 LFREEPATH(filename);
396 if (error)
397 return (error);
398 return (stat64_copyout(&sb, args->statbuf));
399}
400
401int
402linux_fstat64(struct thread *td, struct linux_fstat64_args *args)
403{
404 struct stat buf;
405 int error;
406
407#ifdef DEBUG
408 if (ldebug(fstat64))
409 printf(ARGS(fstat64, "%d, *"), args->fd);
410#endif
411
412 error = kern_fstat(td, args->fd, &buf);
413 if (!error)
414 error = stat64_copyout(&buf, args->statbuf);
415
416 return (error);
417}
418
419#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */