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[PATCH] DVB: Documentation and Kconfig updazes
[linux-2.6/history.git] / fs / compat.c
blob40023e684520e53202227d4b72c758d48996778a
1 /*
2 * linux/fs/compat.c
3 *
4 * Kernel compatibililty routines for e.g. 32 bit syscall support
5 * on 64 bit kernels.
6 *
7 * Copyright (C) 2002 Stephen Rothwell, IBM Corporation
8 * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
9 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
10 * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
11 * Copyright (C) 2003 Pavel Machek (pavel@suse.cz)
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18 #include <linux/linkage.h>
19 #include <linux/compat.h>
20 #include <linux/errno.h>
21 #include <linux/time.h>
22 #include <linux/fs.h>
23 #include <linux/fcntl.h>
24 #include <linux/namei.h>
25 #include <linux/file.h>
26 #include <linux/vfs.h>
27 #include <linux/ioctl32.h>
28 #include <linux/init.h>
29 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
30 #include <linux/smb.h>
31 #include <linux/smb_mount.h>
32 #include <linux/ncp_mount.h>
33 #include <linux/smp_lock.h>
34 #include <linux/syscalls.h>
35 #include <linux/ctype.h>
36 #include <linux/module.h>
37 #include <net/sock.h> /* siocdevprivate_ioctl */
38
39 #include <asm/uaccess.h>
40
41 /*
42 * Not all architectures have sys_utime, so implement this in terms
43 * of sys_utimes.
44 */
45 asmlinkage long compat_sys_utime(char *filename, struct compat_utimbuf *t)
46 {
47 struct timeval tv[2];
48
49 if (t) {
50 if (get_user(tv[0].tv_sec, &t->actime) ||
51 get_user(tv[1].tv_sec, &t->modtime))
52 return -EFAULT;
53 tv[0].tv_usec = 0;
54 tv[1].tv_usec = 0;
55 }
56 return do_utimes(filename, t ? tv : NULL);
57 }
58
59 asmlinkage long compat_sys_utimes(char *filename, struct compat_timeval *t)
60 {
61 struct timeval tv[2];
62
63 if (t) {
64 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
65 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
66 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
67 get_user(tv[1].tv_usec, &t[1].tv_usec))
68 return -EFAULT;
69 }
70 return do_utimes(filename, t ? tv : NULL);
71 }
72
73 asmlinkage long compat_sys_newstat(char * filename,
74 struct compat_stat *statbuf)
75 {
76 struct kstat stat;
77 int error = vfs_stat(filename, &stat);
78
79 if (!error)
80 error = cp_compat_stat(&stat, statbuf);
81 return error;
82 }
83
84 asmlinkage long compat_sys_newlstat(char * filename,
85 struct compat_stat *statbuf)
86 {
87 struct kstat stat;
88 int error = vfs_lstat(filename, &stat);
89
90 if (!error)
91 error = cp_compat_stat(&stat, statbuf);
92 return error;
93 }
94
95 asmlinkage long compat_sys_newfstat(unsigned int fd,
96 struct compat_stat * statbuf)
97 {
98 struct kstat stat;
99 int error = vfs_fstat(fd, &stat);
100
101 if (!error)
102 error = cp_compat_stat(&stat, statbuf);
103 return error;
104 }
105
106 static int put_compat_statfs(struct compat_statfs *ubuf, struct kstatfs *kbuf)
107 {
108
109 if (sizeof ubuf->f_blocks == 4) {
110 if ((kbuf->f_blocks | kbuf->f_bfree |
111 kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
112 0xffffffff00000000ULL)
113 return -EOVERFLOW;
114 }
115 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
116 __put_user(kbuf->f_type, &ubuf->f_type) ||
117 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
118 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
119 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
120 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
121 __put_user(kbuf->f_files, &ubuf->f_files) ||
122 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
123 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
124 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
125 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
126 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
127 __put_user(0, &ubuf->f_spare[0]) ||
128 __put_user(0, &ubuf->f_spare[1]) ||
129 __put_user(0, &ubuf->f_spare[2]) ||
130 __put_user(0, &ubuf->f_spare[3]) ||
131 __put_user(0, &ubuf->f_spare[4]))
132 return -EFAULT;
133 return 0;
134 }
135
136 /*
137 * The following statfs calls are copies of code from fs/open.c and
138 * should be checked against those from time to time
139 */
140 asmlinkage long compat_sys_statfs(const char *path, struct compat_statfs *buf)
141 {
142 struct nameidata nd;
143 int error;
144
145 error = user_path_walk(path, &nd);
146 if (!error) {
147 struct kstatfs tmp;
148 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
149 if (!error && put_compat_statfs(buf, &tmp))
150 error = -EFAULT;
151 path_release(&nd);
152 }
153 return error;
154 }
155
156 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs *buf)
157 {
158 struct file * file;
159 struct kstatfs tmp;
160 int error;
161
162 error = -EBADF;
163 file = fget(fd);
164 if (!file)
165 goto out;
166 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
167 if (!error && put_compat_statfs(buf, &tmp))
168 error = -EFAULT;
169 fput(file);
170 out:
171 return error;
172 }
173
174 static int put_compat_statfs64(struct compat_statfs64 *ubuf, struct kstatfs *kbuf)
175 {
176 if (sizeof ubuf->f_blocks == 4) {
177 if ((kbuf->f_blocks | kbuf->f_bfree |
178 kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
179 0xffffffff00000000ULL)
180 return -EOVERFLOW;
181 }
182 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
183 __put_user(kbuf->f_type, &ubuf->f_type) ||
184 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
185 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
186 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
187 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
188 __put_user(kbuf->f_files, &ubuf->f_files) ||
189 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
190 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
191 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
192 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
193 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
194 return -EFAULT;
195 return 0;
196 }
197
198 asmlinkage long compat_statfs64(const char *path, compat_size_t sz, struct compat_statfs64 *buf)
199 {
200 struct nameidata nd;
201 int error;
202
203 if (sz != sizeof(*buf))
204 return -EINVAL;
205
206 error = user_path_walk(path, &nd);
207 if (!error) {
208 struct kstatfs tmp;
209 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
210 if (!error && put_compat_statfs64(buf, &tmp))
211 error = -EFAULT;
212 path_release(&nd);
213 }
214 return error;
215 }
216
217 asmlinkage long compat_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 *buf)
218 {
219 struct file * file;
220 struct kstatfs tmp;
221 int error;
222
223 if (sz != sizeof(*buf))
224 return -EINVAL;
225
226 error = -EBADF;
227 file = fget(fd);
228 if (!file)
229 goto out;
230 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
231 if (!error && put_compat_statfs64(buf, &tmp))
232 error = -EFAULT;
233 fput(file);
234 out:
235 return error;
236 }
237
238 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64 */
239
240 #define IOCTL_HASHSIZE 256
241 struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
242
243 extern struct ioctl_trans ioctl_start[];
244 extern int ioctl_table_size;
245
246 static inline unsigned long ioctl32_hash(unsigned long cmd)
247 {
248 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
249 }
250
251 static void ioctl32_insert_translation(struct ioctl_trans *trans)
252 {
253 unsigned long hash;
254 struct ioctl_trans *t;
255
256 hash = ioctl32_hash (trans->cmd);
257 if (!ioctl32_hash_table[hash])
258 ioctl32_hash_table[hash] = trans;
259 else {
260 t = ioctl32_hash_table[hash];
261 while (t->next)
262 t = t->next;
263 trans->next = 0;
264 t->next = trans;
265 }
266 }
267
268 static int __init init_sys32_ioctl(void)
269 {
270 int i;
271
272 for (i = 0; i < ioctl_table_size; i++) {
273 if (ioctl_start[i].next != 0) {
274 printk("ioctl translation %d bad\n",i);
275 return -1;
276 }
277
278 ioctl32_insert_translation(&ioctl_start[i]);
279 }
280 return 0;
281 }
282
283 __initcall(init_sys32_ioctl);
284
285 static struct ioctl_trans *ioctl_free_list;
286
287 /* Never free them really. This avoids SMP races. With a Read-Copy-Update
288 enabled kernel we could just use the RCU infrastructure for this. */
289 static void free_ioctl(struct ioctl_trans *t)
290 {
291 t->cmd = 0;
292 mb();
293 t->next = ioctl_free_list;
294 ioctl_free_list = t;
295 }
296
297 int register_ioctl32_conversion(unsigned int cmd, int (*handler)(unsigned int, unsigned int, unsigned long, struct file *))
298 {
299 struct ioctl_trans *t;
300 unsigned long hash = ioctl32_hash(cmd);
301
302 lock_kernel();
303 for (t = (struct ioctl_trans *)ioctl32_hash_table[hash];
304 t;
305 t = t->next) {
306 if (t->cmd == cmd) {
307 printk("Trying to register duplicated ioctl32 handler %x\n", cmd);
308 unlock_kernel();
309 return -EINVAL;
310 }
311 }
312
313 if (ioctl_free_list) {
314 t = ioctl_free_list;
315 ioctl_free_list = t->next;
316 } else {
317 t = kmalloc(sizeof(struct ioctl_trans), GFP_KERNEL);
318 if (!t) {
319 unlock_kernel();
320 return -ENOMEM;
321 }
322 }
323
324 t->next = NULL;
325 t->cmd = cmd;
326 t->handler = handler;
327 ioctl32_insert_translation(t);
328
329 unlock_kernel();
330 return 0;
331 }
332
333 static inline int builtin_ioctl(struct ioctl_trans *t)
334 {
335 return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
336 }
337
338 /* Problem:
339 This function cannot unregister duplicate ioctls, because they are not
340 unique.
341 When they happen we need to extend the prototype to pass the handler too. */
342
343 int unregister_ioctl32_conversion(unsigned int cmd)
344 {
345 unsigned long hash = ioctl32_hash(cmd);
346 struct ioctl_trans *t, *t1;
347
348 lock_kernel();
349
350 t = (struct ioctl_trans *)ioctl32_hash_table[hash];
351 if (!t) {
352 unlock_kernel();
353 return -EINVAL;
354 }
355
356 if (t->cmd == cmd) {
357 if (builtin_ioctl(t)) {
358 printk("%p tried to unregister builtin ioctl %x\n",
359 __builtin_return_address(0), cmd);
360 } else {
361 ioctl32_hash_table[hash] = t->next;
362 free_ioctl(t);
363 unlock_kernel();
364 return 0;
365 }
366 }
367 while (t->next) {
368 t1 = (struct ioctl_trans *)(long)t->next;
369 if (t1->cmd == cmd) {
370 if (builtin_ioctl(t1)) {
371 printk("%p tried to unregister builtin ioctl %x\n",
372 __builtin_return_address(0), cmd);
373 goto out;
374 } else {
375 t->next = t1->next;
376 free_ioctl(t1);
377 unlock_kernel();
378 return 0;
379 }
380 }
381 t = t1;
382 }
383 printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n", cmd);
384 out:
385 unlock_kernel();
386 return -EINVAL;
387 }
388
389 EXPORT_SYMBOL(register_ioctl32_conversion);
390 EXPORT_SYMBOL(unregister_ioctl32_conversion);
391
392 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
393 {
394 struct file * filp;
395 int error = -EBADF;
396 struct ioctl_trans *t;
397
398 filp = fget(fd);
399 if(!filp)
400 goto out2;
401
402 if (!filp->f_op || !filp->f_op->ioctl) {
403 error = sys_ioctl (fd, cmd, arg);
404 goto out;
405 }
406
407 t = (struct ioctl_trans *)ioctl32_hash_table [ioctl32_hash (cmd)];
408
409 while (t && t->cmd != cmd)
410 t = (struct ioctl_trans *)t->next;
411 if (t) {
412 if (t->handler) {
413 lock_kernel();
414 error = t->handler(fd, cmd, arg, filp);
415 unlock_kernel();
416 } else
417 error = sys_ioctl(fd, cmd, arg);
418 } else if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
419 error = siocdevprivate_ioctl(fd, cmd, arg);
420 } else {
421 static int count;
422 if (++count <= 50) {
423 char buf[10];
424 char *path = (char *)__get_free_page(GFP_KERNEL), *fn = "?";
425
426 /* find the name of the device. */
427 if (path) {
428 fn = d_path(filp->f_dentry, filp->f_vfsmnt,
429 path, PAGE_SIZE);
430 }
431
432 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
433 if (!isprint(buf[1]))
434 sprintf(buf, "%02x", buf[1]);
435 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
436 "cmd(%08x){%s} arg(%08x) on %s\n",
437 current->comm, current->pid,
438 (int)fd, (unsigned int)cmd, buf, (unsigned int)arg,
439 fn);
440 if (path)
441 free_page((unsigned long)path);
442 }
443 error = -EINVAL;
444 }
445 out:
446 fput(filp);
447 out2:
448 return error;
449 }
450
451 static int get_compat_flock(struct flock *kfl, struct compat_flock *ufl)
452 {
453 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
454 __get_user(kfl->l_type, &ufl->l_type) ||
455 __get_user(kfl->l_whence, &ufl->l_whence) ||
456 __get_user(kfl->l_start, &ufl->l_start) ||
457 __get_user(kfl->l_len, &ufl->l_len) ||
458 __get_user(kfl->l_pid, &ufl->l_pid))
459 return -EFAULT;
460 return 0;
461 }
462
463 static int put_compat_flock(struct flock *kfl, struct compat_flock *ufl)
464 {
465 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
466 __put_user(kfl->l_type, &ufl->l_type) ||
467 __put_user(kfl->l_whence, &ufl->l_whence) ||
468 __put_user(kfl->l_start, &ufl->l_start) ||
469 __put_user(kfl->l_len, &ufl->l_len) ||
470 __put_user(kfl->l_pid, &ufl->l_pid))
471 return -EFAULT;
472 return 0;
473 }
474
475 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
476 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 *ufl)
477 {
478 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
479 __get_user(kfl->l_type, &ufl->l_type) ||
480 __get_user(kfl->l_whence, &ufl->l_whence) ||
481 __get_user(kfl->l_start, &ufl->l_start) ||
482 __get_user(kfl->l_len, &ufl->l_len) ||
483 __get_user(kfl->l_pid, &ufl->l_pid))
484 return -EFAULT;
485 return 0;
486 }
487 #endif
488
489 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
490 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 *ufl)
491 {
492 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
493 __put_user(kfl->l_type, &ufl->l_type) ||
494 __put_user(kfl->l_whence, &ufl->l_whence) ||
495 __put_user(kfl->l_start, &ufl->l_start) ||
496 __put_user(kfl->l_len, &ufl->l_len) ||
497 __put_user(kfl->l_pid, &ufl->l_pid))
498 return -EFAULT;
499 return 0;
500 }
501 #endif
502
503 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
504 unsigned long arg)
505 {
506 mm_segment_t old_fs;
507 struct flock f;
508 long ret;
509
510 switch (cmd) {
511 case F_GETLK:
512 case F_SETLK:
513 case F_SETLKW:
514 ret = get_compat_flock(&f, compat_ptr(arg));
515 if (ret != 0)
516 break;
517 old_fs = get_fs();
518 set_fs(KERNEL_DS);
519 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
520 set_fs(old_fs);
521 if ((cmd == F_GETLK) && (ret == 0)) {
522 if ((f.l_start >= COMPAT_OFF_T_MAX) ||
523 ((f.l_start + f.l_len) >= COMPAT_OFF_T_MAX))
524 ret = -EOVERFLOW;
525 if (ret == 0)
526 ret = put_compat_flock(&f, compat_ptr(arg));
527 }
528 break;
529
530 case F_GETLK64:
531 case F_SETLK64:
532 case F_SETLKW64:
533 ret = get_compat_flock64(&f, compat_ptr(arg));
534 if (ret != 0)
535 break;
536 old_fs = get_fs();
537 set_fs(KERNEL_DS);
538 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
539 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
540 (unsigned long)&f);
541 set_fs(old_fs);
542 if ((cmd == F_GETLK64) && (ret == 0)) {
543 if ((f.l_start >= COMPAT_LOFF_T_MAX) ||
544 ((f.l_start + f.l_len) >= COMPAT_LOFF_T_MAX))
545 ret = -EOVERFLOW;
546 if (ret == 0)
547 ret = put_compat_flock64(&f, compat_ptr(arg));
548 }
549 break;
550
551 default:
552 ret = sys_fcntl(fd, cmd, arg);
553 break;
554 }
555 return ret;
556 }
557
558 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
559 unsigned long arg)
560 {
561 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
562 return -EINVAL;
563 return compat_sys_fcntl64(fd, cmd, arg);
564 }
565
566 asmlinkage long
567 compat_sys_io_setup(unsigned nr_reqs, u32 *ctx32p)
568 {
569 long ret;
570 aio_context_t ctx64;
571
572 mm_segment_t oldfs = get_fs();
573 if (unlikely(get_user(ctx64, ctx32p)))
574 return -EFAULT;
575
576 set_fs(KERNEL_DS);
577 ret = sys_io_setup(nr_reqs, &ctx64);
578 set_fs(oldfs);
579 /* truncating is ok because it's a user address */
580 if (!ret)
581 ret = put_user((u32) ctx64, ctx32p);
582 return ret;
583 }
584
585 asmlinkage long
586 compat_sys_io_getevents(aio_context_t ctx_id,
587 unsigned long min_nr,
588 unsigned long nr,
589 struct io_event *events,
590 struct compat_timespec *timeout)
591 {
592 long ret;
593 struct timespec t;
594 struct timespec *ut = NULL;
595
596 ret = -EFAULT;
597 if (unlikely(!access_ok(VERIFY_WRITE, events,
598 nr * sizeof(struct io_event))))
599 goto out;
600 if (timeout) {
601 if (get_compat_timespec(&t, timeout))
602 goto out;
603
604 ut = compat_alloc_user_space(sizeof(*ut));
605 if (copy_to_user(ut, &t, sizeof(t)) )
606 goto out;
607 }
608 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
609 out:
610 return ret;
611 }
612
613 static inline long
614 copy_iocb(long nr, u32 *ptr32, u64 *ptr64)
615 {
616 compat_uptr_t uptr;
617 int i;
618
619 for (i = 0; i < nr; ++i) {
620 if (get_user(uptr, ptr32 + i))
621 return -EFAULT;
622 if (put_user((u64)compat_ptr(uptr), ptr64 + i))
623 return -EFAULT;
624 }
625 return 0;
626 }
627
628 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
629
630 asmlinkage long
631 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 *iocb)
632 {
633 struct iocb **iocb64;
634 long ret;
635
636 if (unlikely(nr < 0))
637 return -EINVAL;
638
639 if (nr > MAX_AIO_SUBMITS)
640 nr = MAX_AIO_SUBMITS;
641
642 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
643 ret = copy_iocb(nr, iocb, (u64 *) iocb64);
644 if (!ret)
645 ret = sys_io_submit(ctx_id, nr, iocb64);
646 return ret;
647 }
648
649 struct compat_ncp_mount_data {
650 compat_int_t version;
651 compat_uint_t ncp_fd;
652 compat_uid_t mounted_uid;
653 compat_pid_t wdog_pid;
654 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
655 compat_uint_t time_out;
656 compat_uint_t retry_count;
657 compat_uint_t flags;
658 compat_uid_t uid;
659 compat_gid_t gid;
660 compat_mode_t file_mode;
661 compat_mode_t dir_mode;
662 };
663
664 struct compat_ncp_mount_data_v4 {
665 compat_int_t version;
666 compat_ulong_t flags;
667 compat_ulong_t mounted_uid;
668 compat_long_t wdog_pid;
669 compat_uint_t ncp_fd;
670 compat_uint_t time_out;
671 compat_uint_t retry_count;
672 compat_ulong_t uid;
673 compat_ulong_t gid;
674 compat_ulong_t file_mode;
675 compat_ulong_t dir_mode;
676 };
677
678 static void *do_ncp_super_data_conv(void *raw_data)
679 {
680 int version = *(unsigned int *)raw_data;
681
682 if (version == 3) {
683 struct compat_ncp_mount_data *c_n = raw_data;
684 struct ncp_mount_data *n = raw_data;
685
686 n->dir_mode = c_n->dir_mode;
687 n->file_mode = c_n->file_mode;
688 n->gid = c_n->gid;
689 n->uid = c_n->uid;
690 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
691 n->wdog_pid = c_n->wdog_pid;
692 n->mounted_uid = c_n->mounted_uid;
693 } else if (version == 4) {
694 struct compat_ncp_mount_data_v4 *c_n = raw_data;
695 struct ncp_mount_data_v4 *n = raw_data;
696
697 n->dir_mode = c_n->dir_mode;
698 n->file_mode = c_n->file_mode;
699 n->gid = c_n->gid;
700 n->uid = c_n->uid;
701 n->retry_count = c_n->retry_count;
702 n->time_out = c_n->time_out;
703 n->ncp_fd = c_n->ncp_fd;
704 n->wdog_pid = c_n->wdog_pid;
705 n->mounted_uid = c_n->mounted_uid;
706 n->flags = c_n->flags;
707 } else if (version != 5) {
708 return NULL;
709 }
710
711 return raw_data;
712 }
713
714 struct compat_smb_mount_data {
715 compat_int_t version;
716 compat_uid_t mounted_uid;
717 compat_uid_t uid;
718 compat_gid_t gid;
719 compat_mode_t file_mode;
720 compat_mode_t dir_mode;
721 };
722
723 static void *do_smb_super_data_conv(void *raw_data)
724 {
725 struct smb_mount_data *s = raw_data;
726 struct compat_smb_mount_data *c_s = raw_data;
727
728 if (c_s->version != SMB_MOUNT_OLDVERSION)
729 goto out;
730 s->dir_mode = c_s->dir_mode;
731 s->file_mode = c_s->file_mode;
732 s->gid = c_s->gid;
733 s->uid = c_s->uid;
734 s->mounted_uid = c_s->mounted_uid;
735 out:
736 return raw_data;
737 }
738
739 extern int copy_mount_options (const void __user *, unsigned long *);
740
741 #define SMBFS_NAME "smbfs"
742 #define NCPFS_NAME "ncpfs"
743
744 asmlinkage int compat_sys_mount(char __user * dev_name, char __user * dir_name,
745 char __user * type, unsigned long flags,
746 void __user * data)
747 {
748 unsigned long type_page;
749 unsigned long data_page;
750 unsigned long dev_page;
751 char *dir_page;
752 int retval;
753
754 retval = copy_mount_options (type, &type_page);
755 if (retval < 0)
756 goto out;
757
758 dir_page = getname(dir_name);
759 retval = PTR_ERR(dir_page);
760 if (IS_ERR(dir_page))
761 goto out1;
762
763 retval = copy_mount_options (dev_name, &dev_page);
764 if (retval < 0)
765 goto out2;
766
767 retval = copy_mount_options (data, &data_page);
768 if (retval < 0)
769 goto out3;
770
771 retval = -EINVAL;
772
773 if (type_page) {
774 if (!strcmp((char *)type_page, SMBFS_NAME)) {
775 do_smb_super_data_conv((void *)data_page);
776 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
777 do_ncp_super_data_conv((void *)data_page);
778 }
779 }
780
781 lock_kernel();
782 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
783 flags, (void*)data_page);
784 unlock_kernel();
785
786 free_page(data_page);
787 out3:
788 free_page(dev_page);
789 out2:
790 putname(dir_page);
791 out1:
792 free_page(type_page);
793 out:
794 return retval;
795 }
796
Historical 2.5/2.6 development