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USB: rtl8150 new device id
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / fs / compat.c
blobedc03610494206d595c4963deb6a53fbe2c641e5
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/ioctl.h>
29 #include <linux/init.h>
30 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
31 #include <linux/smb.h>
32 #include <linux/smb_mount.h>
33 #include <linux/ncp_mount.h>
34 #include <linux/nfs4_mount.h>
35 #include <linux/smp_lock.h>
36 #include <linux/syscalls.h>
37 #include <linux/ctype.h>
38 #include <linux/module.h>
39 #include <linux/dirent.h>
40 #include <linux/fsnotify.h>
41 #include <linux/highuid.h>
42 #include <linux/sunrpc/svc.h>
43 #include <linux/nfsd/nfsd.h>
44 #include <linux/nfsd/syscall.h>
45 #include <linux/personality.h>
46 #include <linux/rwsem.h>
47 #include <linux/acct.h>
48 #include <linux/mm.h>
49
50 #include <net/sock.h> /* siocdevprivate_ioctl */
51
52 #include <asm/uaccess.h>
53 #include <asm/mmu_context.h>
54 #include <asm/ioctls.h>
55
56 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
57
58 /*
59 * Not all architectures have sys_utime, so implement this in terms
60 * of sys_utimes.
61 */
62 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
63 {
64 struct timeval tv[2];
65
66 if (t) {
67 if (get_user(tv[0].tv_sec, &t->actime) ||
68 get_user(tv[1].tv_sec, &t->modtime))
69 return -EFAULT;
70 tv[0].tv_usec = 0;
71 tv[1].tv_usec = 0;
72 }
73 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
74 }
75
76 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
77 {
78 struct timeval tv[2];
79
80 if (t) {
81 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
82 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
83 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
84 get_user(tv[1].tv_usec, &t[1].tv_usec))
85 return -EFAULT;
86 }
87 return do_utimes(dfd, filename, t ? tv : NULL);
88 }
89
90 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
91 {
92 return compat_sys_futimesat(AT_FDCWD, filename, t);
93 }
94
95 asmlinkage long compat_sys_newstat(char __user * filename,
96 struct compat_stat __user *statbuf)
97 {
98 struct kstat stat;
99 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
100
101 if (!error)
102 error = cp_compat_stat(&stat, statbuf);
103 return error;
104 }
105
106 asmlinkage long compat_sys_newlstat(char __user * filename,
107 struct compat_stat __user *statbuf)
108 {
109 struct kstat stat;
110 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
111
112 if (!error)
113 error = cp_compat_stat(&stat, statbuf);
114 return error;
115 }
116
117 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
118 struct compat_stat __user *statbuf, int flag)
119 {
120 struct kstat stat;
121 int error = -EINVAL;
122
123 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
124 goto out;
125
126 if (flag & AT_SYMLINK_NOFOLLOW)
127 error = vfs_lstat_fd(dfd, filename, &stat);
128 else
129 error = vfs_stat_fd(dfd, filename, &stat);
130
131 if (!error)
132 error = cp_compat_stat(&stat, statbuf);
133
134 out:
135 return error;
136 }
137
138 asmlinkage long compat_sys_newfstat(unsigned int fd,
139 struct compat_stat __user * statbuf)
140 {
141 struct kstat stat;
142 int error = vfs_fstat(fd, &stat);
143
144 if (!error)
145 error = cp_compat_stat(&stat, statbuf);
146 return error;
147 }
148
149 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
150 {
151
152 if (sizeof ubuf->f_blocks == 4) {
153 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
154 0xffffffff00000000ULL)
155 return -EOVERFLOW;
156 /* f_files and f_ffree may be -1; it's okay
157 * to stuff that into 32 bits */
158 if (kbuf->f_files != 0xffffffffffffffffULL
159 && (kbuf->f_files & 0xffffffff00000000ULL))
160 return -EOVERFLOW;
161 if (kbuf->f_ffree != 0xffffffffffffffffULL
162 && (kbuf->f_ffree & 0xffffffff00000000ULL))
163 return -EOVERFLOW;
164 }
165 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
166 __put_user(kbuf->f_type, &ubuf->f_type) ||
167 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
168 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
169 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
170 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
171 __put_user(kbuf->f_files, &ubuf->f_files) ||
172 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
173 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
174 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
175 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
176 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
177 __put_user(0, &ubuf->f_spare[0]) ||
178 __put_user(0, &ubuf->f_spare[1]) ||
179 __put_user(0, &ubuf->f_spare[2]) ||
180 __put_user(0, &ubuf->f_spare[3]) ||
181 __put_user(0, &ubuf->f_spare[4]))
182 return -EFAULT;
183 return 0;
184 }
185
186 /*
187 * The following statfs calls are copies of code from fs/open.c and
188 * should be checked against those from time to time
189 */
190 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
191 {
192 struct nameidata nd;
193 int error;
194
195 error = user_path_walk(path, &nd);
196 if (!error) {
197 struct kstatfs tmp;
198 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
199 if (!error)
200 error = put_compat_statfs(buf, &tmp);
201 path_release(&nd);
202 }
203 return error;
204 }
205
206 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
207 {
208 struct file * file;
209 struct kstatfs tmp;
210 int error;
211
212 error = -EBADF;
213 file = fget(fd);
214 if (!file)
215 goto out;
216 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
217 if (!error)
218 error = put_compat_statfs(buf, &tmp);
219 fput(file);
220 out:
221 return error;
222 }
223
224 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
225 {
226 if (sizeof ubuf->f_blocks == 4) {
227 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
228 0xffffffff00000000ULL)
229 return -EOVERFLOW;
230 /* f_files and f_ffree may be -1; it's okay
231 * to stuff that into 32 bits */
232 if (kbuf->f_files != 0xffffffffffffffffULL
233 && (kbuf->f_files & 0xffffffff00000000ULL))
234 return -EOVERFLOW;
235 if (kbuf->f_ffree != 0xffffffffffffffffULL
236 && (kbuf->f_ffree & 0xffffffff00000000ULL))
237 return -EOVERFLOW;
238 }
239 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
240 __put_user(kbuf->f_type, &ubuf->f_type) ||
241 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
242 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
243 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
244 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
245 __put_user(kbuf->f_files, &ubuf->f_files) ||
246 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
247 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
248 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
249 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
250 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
251 return -EFAULT;
252 return 0;
253 }
254
255 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
256 {
257 struct nameidata nd;
258 int error;
259
260 if (sz != sizeof(*buf))
261 return -EINVAL;
262
263 error = user_path_walk(path, &nd);
264 if (!error) {
265 struct kstatfs tmp;
266 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
267 if (!error)
268 error = put_compat_statfs64(buf, &tmp);
269 path_release(&nd);
270 }
271 return error;
272 }
273
274 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
275 {
276 struct file * file;
277 struct kstatfs tmp;
278 int error;
279
280 if (sz != sizeof(*buf))
281 return -EINVAL;
282
283 error = -EBADF;
284 file = fget(fd);
285 if (!file)
286 goto out;
287 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
288 if (!error)
289 error = put_compat_statfs64(buf, &tmp);
290 fput(file);
291 out:
292 return error;
293 }
294
295 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
296
297 #define IOCTL_HASHSIZE 256
298 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
299
300 extern struct ioctl_trans ioctl_start[];
301 extern int ioctl_table_size;
302
303 static inline unsigned long ioctl32_hash(unsigned long cmd)
304 {
305 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
306 }
307
308 static void ioctl32_insert_translation(struct ioctl_trans *trans)
309 {
310 unsigned long hash;
311 struct ioctl_trans *t;
312
313 hash = ioctl32_hash (trans->cmd);
314 if (!ioctl32_hash_table[hash])
315 ioctl32_hash_table[hash] = trans;
316 else {
317 t = ioctl32_hash_table[hash];
318 while (t->next)
319 t = t->next;
320 trans->next = NULL;
321 t->next = trans;
322 }
323 }
324
325 static int __init init_sys32_ioctl(void)
326 {
327 int i;
328
329 for (i = 0; i < ioctl_table_size; i++) {
330 if (ioctl_start[i].next != 0) {
331 printk("ioctl translation %d bad\n",i);
332 return -1;
333 }
334
335 ioctl32_insert_translation(&ioctl_start[i]);
336 }
337 return 0;
338 }
339
340 __initcall(init_sys32_ioctl);
341
342 static void compat_ioctl_error(struct file *filp, unsigned int fd,
343 unsigned int cmd, unsigned long arg)
344 {
345 char buf[10];
346 char *fn = "?";
347 char *path;
348
349 /* find the name of the device. */
350 path = (char *)__get_free_page(GFP_KERNEL);
351 if (path) {
352 fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
353 if (IS_ERR(fn))
354 fn = "?";
355 }
356
357 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
358 if (!isprint(buf[1]))
359 sprintf(buf, "%02x", buf[1]);
360 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
361 "cmd(%08x){%s} arg(%08x) on %s\n",
362 current->comm, current->pid,
363 (int)fd, (unsigned int)cmd, buf,
364 (unsigned int)arg, fn);
365
366 if (path)
367 free_page((unsigned long)path);
368 }
369
370 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
371 unsigned long arg)
372 {
373 struct file *filp;
374 int error = -EBADF;
375 struct ioctl_trans *t;
376 int fput_needed;
377
378 filp = fget_light(fd, &fput_needed);
379 if (!filp)
380 goto out;
381
382 /* RED-PEN how should LSM module know it's handling 32bit? */
383 error = security_file_ioctl(filp, cmd, arg);
384 if (error)
385 goto out_fput;
386
387 /*
388 * To allow the compat_ioctl handlers to be self contained
389 * we need to check the common ioctls here first.
390 * Just handle them with the standard handlers below.
391 */
392 switch (cmd) {
393 case FIOCLEX:
394 case FIONCLEX:
395 case FIONBIO:
396 case FIOASYNC:
397 case FIOQSIZE:
398 break;
399
400 case FIBMAP:
401 case FIGETBSZ:
402 case FIONREAD:
403 if (S_ISREG(filp->f_dentry->d_inode->i_mode))
404 break;
405 /*FALL THROUGH*/
406
407 default:
408 if (filp->f_op && filp->f_op->compat_ioctl) {
409 error = filp->f_op->compat_ioctl(filp, cmd, arg);
410 if (error != -ENOIOCTLCMD)
411 goto out_fput;
412 }
413
414 if (!filp->f_op ||
415 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
416 goto do_ioctl;
417 break;
418 }
419
420 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
421 if (t->cmd == cmd)
422 goto found_handler;
423 }
424
425 if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
426 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
427 error = siocdevprivate_ioctl(fd, cmd, arg);
428 } else {
429 static int count;
430
431 if (++count <= 50)
432 compat_ioctl_error(filp, fd, cmd, arg);
433 error = -EINVAL;
434 }
435
436 goto out_fput;
437
438 found_handler:
439 if (t->handler) {
440 lock_kernel();
441 error = t->handler(fd, cmd, arg, filp);
442 unlock_kernel();
443 goto out_fput;
444 }
445
446 do_ioctl:
447 error = vfs_ioctl(filp, fd, cmd, arg);
448 out_fput:
449 fput_light(filp, fput_needed);
450 out:
451 return error;
452 }
453
454 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
455 {
456 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
457 __get_user(kfl->l_type, &ufl->l_type) ||
458 __get_user(kfl->l_whence, &ufl->l_whence) ||
459 __get_user(kfl->l_start, &ufl->l_start) ||
460 __get_user(kfl->l_len, &ufl->l_len) ||
461 __get_user(kfl->l_pid, &ufl->l_pid))
462 return -EFAULT;
463 return 0;
464 }
465
466 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
467 {
468 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
469 __put_user(kfl->l_type, &ufl->l_type) ||
470 __put_user(kfl->l_whence, &ufl->l_whence) ||
471 __put_user(kfl->l_start, &ufl->l_start) ||
472 __put_user(kfl->l_len, &ufl->l_len) ||
473 __put_user(kfl->l_pid, &ufl->l_pid))
474 return -EFAULT;
475 return 0;
476 }
477
478 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
479 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
480 {
481 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
482 __get_user(kfl->l_type, &ufl->l_type) ||
483 __get_user(kfl->l_whence, &ufl->l_whence) ||
484 __get_user(kfl->l_start, &ufl->l_start) ||
485 __get_user(kfl->l_len, &ufl->l_len) ||
486 __get_user(kfl->l_pid, &ufl->l_pid))
487 return -EFAULT;
488 return 0;
489 }
490 #endif
491
492 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
493 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
494 {
495 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
496 __put_user(kfl->l_type, &ufl->l_type) ||
497 __put_user(kfl->l_whence, &ufl->l_whence) ||
498 __put_user(kfl->l_start, &ufl->l_start) ||
499 __put_user(kfl->l_len, &ufl->l_len) ||
500 __put_user(kfl->l_pid, &ufl->l_pid))
501 return -EFAULT;
502 return 0;
503 }
504 #endif
505
506 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
507 unsigned long arg)
508 {
509 mm_segment_t old_fs;
510 struct flock f;
511 long ret;
512
513 switch (cmd) {
514 case F_GETLK:
515 case F_SETLK:
516 case F_SETLKW:
517 ret = get_compat_flock(&f, compat_ptr(arg));
518 if (ret != 0)
519 break;
520 old_fs = get_fs();
521 set_fs(KERNEL_DS);
522 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
523 set_fs(old_fs);
524 if (cmd == F_GETLK && ret == 0) {
525 /* GETLK was successfule and we need to return the data...
526 * but it needs to fit in the compat structure.
527 * l_start shouldn't be too big, unless the original
528 * start + end is greater than COMPAT_OFF_T_MAX, in which
529 * case the app was asking for trouble, so we return
530 * -EOVERFLOW in that case.
531 * l_len could be too big, in which case we just truncate it,
532 * and only allow the app to see that part of the conflicting
533 * lock that might make sense to it anyway
534 */
535
536 if (f.l_start > COMPAT_OFF_T_MAX)
537 ret = -EOVERFLOW;
538 if (f.l_len > COMPAT_OFF_T_MAX)
539 f.l_len = COMPAT_OFF_T_MAX;
540 if (ret == 0)
541 ret = put_compat_flock(&f, compat_ptr(arg));
542 }
543 break;
544
545 case F_GETLK64:
546 case F_SETLK64:
547 case F_SETLKW64:
548 ret = get_compat_flock64(&f, compat_ptr(arg));
549 if (ret != 0)
550 break;
551 old_fs = get_fs();
552 set_fs(KERNEL_DS);
553 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
554 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
555 (unsigned long)&f);
556 set_fs(old_fs);
557 if (cmd == F_GETLK64 && ret == 0) {
558 /* need to return lock information - see above for commentary */
559 if (f.l_start > COMPAT_LOFF_T_MAX)
560 ret = -EOVERFLOW;
561 if (f.l_len > COMPAT_LOFF_T_MAX)
562 f.l_len = COMPAT_LOFF_T_MAX;
563 if (ret == 0)
564 ret = put_compat_flock64(&f, compat_ptr(arg));
565 }
566 break;
567
568 default:
569 ret = sys_fcntl(fd, cmd, arg);
570 break;
571 }
572 return ret;
573 }
574
575 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
576 unsigned long arg)
577 {
578 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
579 return -EINVAL;
580 return compat_sys_fcntl64(fd, cmd, arg);
581 }
582
583 asmlinkage long
584 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
585 {
586 long ret;
587 aio_context_t ctx64;
588
589 mm_segment_t oldfs = get_fs();
590 if (unlikely(get_user(ctx64, ctx32p)))
591 return -EFAULT;
592
593 set_fs(KERNEL_DS);
594 /* The __user pointer cast is valid because of the set_fs() */
595 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
596 set_fs(oldfs);
597 /* truncating is ok because it's a user address */
598 if (!ret)
599 ret = put_user((u32) ctx64, ctx32p);
600 return ret;
601 }
602
603 asmlinkage long
604 compat_sys_io_getevents(aio_context_t ctx_id,
605 unsigned long min_nr,
606 unsigned long nr,
607 struct io_event __user *events,
608 struct compat_timespec __user *timeout)
609 {
610 long ret;
611 struct timespec t;
612 struct timespec __user *ut = NULL;
613
614 ret = -EFAULT;
615 if (unlikely(!access_ok(VERIFY_WRITE, events,
616 nr * sizeof(struct io_event))))
617 goto out;
618 if (timeout) {
619 if (get_compat_timespec(&t, timeout))
620 goto out;
621
622 ut = compat_alloc_user_space(sizeof(*ut));
623 if (copy_to_user(ut, &t, sizeof(t)) )
624 goto out;
625 }
626 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
627 out:
628 return ret;
629 }
630
631 static inline long
632 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
633 {
634 compat_uptr_t uptr;
635 int i;
636
637 for (i = 0; i < nr; ++i) {
638 if (get_user(uptr, ptr32 + i))
639 return -EFAULT;
640 if (put_user(compat_ptr(uptr), ptr64 + i))
641 return -EFAULT;
642 }
643 return 0;
644 }
645
646 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
647
648 asmlinkage long
649 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
650 {
651 struct iocb __user * __user *iocb64;
652 long ret;
653
654 if (unlikely(nr < 0))
655 return -EINVAL;
656
657 if (nr > MAX_AIO_SUBMITS)
658 nr = MAX_AIO_SUBMITS;
659
660 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
661 ret = copy_iocb(nr, iocb, iocb64);
662 if (!ret)
663 ret = sys_io_submit(ctx_id, nr, iocb64);
664 return ret;
665 }
666
667 struct compat_ncp_mount_data {
668 compat_int_t version;
669 compat_uint_t ncp_fd;
670 __compat_uid_t mounted_uid;
671 compat_pid_t wdog_pid;
672 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
673 compat_uint_t time_out;
674 compat_uint_t retry_count;
675 compat_uint_t flags;
676 __compat_uid_t uid;
677 __compat_gid_t gid;
678 compat_mode_t file_mode;
679 compat_mode_t dir_mode;
680 };
681
682 struct compat_ncp_mount_data_v4 {
683 compat_int_t version;
684 compat_ulong_t flags;
685 compat_ulong_t mounted_uid;
686 compat_long_t wdog_pid;
687 compat_uint_t ncp_fd;
688 compat_uint_t time_out;
689 compat_uint_t retry_count;
690 compat_ulong_t uid;
691 compat_ulong_t gid;
692 compat_ulong_t file_mode;
693 compat_ulong_t dir_mode;
694 };
695
696 static void *do_ncp_super_data_conv(void *raw_data)
697 {
698 int version = *(unsigned int *)raw_data;
699
700 if (version == 3) {
701 struct compat_ncp_mount_data *c_n = raw_data;
702 struct ncp_mount_data *n = raw_data;
703
704 n->dir_mode = c_n->dir_mode;
705 n->file_mode = c_n->file_mode;
706 n->gid = c_n->gid;
707 n->uid = c_n->uid;
708 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
709 n->wdog_pid = c_n->wdog_pid;
710 n->mounted_uid = c_n->mounted_uid;
711 } else if (version == 4) {
712 struct compat_ncp_mount_data_v4 *c_n = raw_data;
713 struct ncp_mount_data_v4 *n = raw_data;
714
715 n->dir_mode = c_n->dir_mode;
716 n->file_mode = c_n->file_mode;
717 n->gid = c_n->gid;
718 n->uid = c_n->uid;
719 n->retry_count = c_n->retry_count;
720 n->time_out = c_n->time_out;
721 n->ncp_fd = c_n->ncp_fd;
722 n->wdog_pid = c_n->wdog_pid;
723 n->mounted_uid = c_n->mounted_uid;
724 n->flags = c_n->flags;
725 } else if (version != 5) {
726 return NULL;
727 }
728
729 return raw_data;
730 }
731
732 struct compat_smb_mount_data {
733 compat_int_t version;
734 __compat_uid_t mounted_uid;
735 __compat_uid_t uid;
736 __compat_gid_t gid;
737 compat_mode_t file_mode;
738 compat_mode_t dir_mode;
739 };
740
741 static void *do_smb_super_data_conv(void *raw_data)
742 {
743 struct smb_mount_data *s = raw_data;
744 struct compat_smb_mount_data *c_s = raw_data;
745
746 if (c_s->version != SMB_MOUNT_OLDVERSION)
747 goto out;
748 s->dir_mode = c_s->dir_mode;
749 s->file_mode = c_s->file_mode;
750 s->gid = c_s->gid;
751 s->uid = c_s->uid;
752 s->mounted_uid = c_s->mounted_uid;
753 out:
754 return raw_data;
755 }
756
757 struct compat_nfs_string {
758 compat_uint_t len;
759 compat_uptr_t data;
760 };
761
762 static inline void compat_nfs_string(struct nfs_string *dst,
763 struct compat_nfs_string *src)
764 {
765 dst->data = compat_ptr(src->data);
766 dst->len = src->len;
767 }
768
769 struct compat_nfs4_mount_data_v1 {
770 compat_int_t version;
771 compat_int_t flags;
772 compat_int_t rsize;
773 compat_int_t wsize;
774 compat_int_t timeo;
775 compat_int_t retrans;
776 compat_int_t acregmin;
777 compat_int_t acregmax;
778 compat_int_t acdirmin;
779 compat_int_t acdirmax;
780 struct compat_nfs_string client_addr;
781 struct compat_nfs_string mnt_path;
782 struct compat_nfs_string hostname;
783 compat_uint_t host_addrlen;
784 compat_uptr_t host_addr;
785 compat_int_t proto;
786 compat_int_t auth_flavourlen;
787 compat_uptr_t auth_flavours;
788 };
789
790 static int do_nfs4_super_data_conv(void *raw_data)
791 {
792 int version = *(compat_uint_t *) raw_data;
793
794 if (version == 1) {
795 struct compat_nfs4_mount_data_v1 *raw = raw_data;
796 struct nfs4_mount_data *real = raw_data;
797
798 /* copy the fields backwards */
799 real->auth_flavours = compat_ptr(raw->auth_flavours);
800 real->auth_flavourlen = raw->auth_flavourlen;
801 real->proto = raw->proto;
802 real->host_addr = compat_ptr(raw->host_addr);
803 real->host_addrlen = raw->host_addrlen;
804 compat_nfs_string(&real->hostname, &raw->hostname);
805 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
806 compat_nfs_string(&real->client_addr, &raw->client_addr);
807 real->acdirmax = raw->acdirmax;
808 real->acdirmin = raw->acdirmin;
809 real->acregmax = raw->acregmax;
810 real->acregmin = raw->acregmin;
811 real->retrans = raw->retrans;
812 real->timeo = raw->timeo;
813 real->wsize = raw->wsize;
814 real->rsize = raw->rsize;
815 real->flags = raw->flags;
816 real->version = raw->version;
817 }
818 else {
819 return -EINVAL;
820 }
821
822 return 0;
823 }
824
825 extern int copy_mount_options (const void __user *, unsigned long *);
826
827 #define SMBFS_NAME "smbfs"
828 #define NCPFS_NAME "ncpfs"
829 #define NFS4_NAME "nfs4"
830
831 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
832 char __user * type, unsigned long flags,
833 void __user * data)
834 {
835 unsigned long type_page;
836 unsigned long data_page;
837 unsigned long dev_page;
838 char *dir_page;
839 int retval;
840
841 retval = copy_mount_options (type, &type_page);
842 if (retval < 0)
843 goto out;
844
845 dir_page = getname(dir_name);
846 retval = PTR_ERR(dir_page);
847 if (IS_ERR(dir_page))
848 goto out1;
849
850 retval = copy_mount_options (dev_name, &dev_page);
851 if (retval < 0)
852 goto out2;
853
854 retval = copy_mount_options (data, &data_page);
855 if (retval < 0)
856 goto out3;
857
858 retval = -EINVAL;
859
860 if (type_page && data_page) {
861 if (!strcmp((char *)type_page, SMBFS_NAME)) {
862 do_smb_super_data_conv((void *)data_page);
863 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
864 do_ncp_super_data_conv((void *)data_page);
865 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
866 if (do_nfs4_super_data_conv((void *) data_page))
867 goto out4;
868 }
869 }
870
871 lock_kernel();
872 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
873 flags, (void*)data_page);
874 unlock_kernel();
875
876 out4:
877 free_page(data_page);
878 out3:
879 free_page(dev_page);
880 out2:
881 putname(dir_page);
882 out1:
883 free_page(type_page);
884 out:
885 return retval;
886 }
887
888 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
889 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
890 ~(sizeof(compat_long_t)-1))
891
892 struct compat_old_linux_dirent {
893 compat_ulong_t d_ino;
894 compat_ulong_t d_offset;
895 unsigned short d_namlen;
896 char d_name[1];
897 };
898
899 struct compat_readdir_callback {
900 struct compat_old_linux_dirent __user *dirent;
901 int result;
902 };
903
904 static int compat_fillonedir(void *__buf, const char *name, int namlen,
905 loff_t offset, ino_t ino, unsigned int d_type)
906 {
907 struct compat_readdir_callback *buf = __buf;
908 struct compat_old_linux_dirent __user *dirent;
909
910 if (buf->result)
911 return -EINVAL;
912 buf->result++;
913 dirent = buf->dirent;
914 if (!access_ok(VERIFY_WRITE, dirent,
915 (unsigned long)(dirent->d_name + namlen + 1) -
916 (unsigned long)dirent))
917 goto efault;
918 if ( __put_user(ino, &dirent->d_ino) ||
919 __put_user(offset, &dirent->d_offset) ||
920 __put_user(namlen, &dirent->d_namlen) ||
921 __copy_to_user(dirent->d_name, name, namlen) ||
922 __put_user(0, dirent->d_name + namlen))
923 goto efault;
924 return 0;
925 efault:
926 buf->result = -EFAULT;
927 return -EFAULT;
928 }
929
930 asmlinkage long compat_sys_old_readdir(unsigned int fd,
931 struct compat_old_linux_dirent __user *dirent, unsigned int count)
932 {
933 int error;
934 struct file *file;
935 struct compat_readdir_callback buf;
936
937 error = -EBADF;
938 file = fget(fd);
939 if (!file)
940 goto out;
941
942 buf.result = 0;
943 buf.dirent = dirent;
944
945 error = vfs_readdir(file, compat_fillonedir, &buf);
946 if (error >= 0)
947 error = buf.result;
948
949 fput(file);
950 out:
951 return error;
952 }
953
954 struct compat_linux_dirent {
955 compat_ulong_t d_ino;
956 compat_ulong_t d_off;
957 unsigned short d_reclen;
958 char d_name[1];
959 };
960
961 struct compat_getdents_callback {
962 struct compat_linux_dirent __user *current_dir;
963 struct compat_linux_dirent __user *previous;
964 int count;
965 int error;
966 };
967
968 static int compat_filldir(void *__buf, const char *name, int namlen,
969 loff_t offset, ino_t ino, unsigned int d_type)
970 {
971 struct compat_linux_dirent __user * dirent;
972 struct compat_getdents_callback *buf = __buf;
973 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
974
975 buf->error = -EINVAL; /* only used if we fail.. */
976 if (reclen > buf->count)
977 return -EINVAL;
978 dirent = buf->previous;
979 if (dirent) {
980 if (__put_user(offset, &dirent->d_off))
981 goto efault;
982 }
983 dirent = buf->current_dir;
984 if (__put_user(ino, &dirent->d_ino))
985 goto efault;
986 if (__put_user(reclen, &dirent->d_reclen))
987 goto efault;
988 if (copy_to_user(dirent->d_name, name, namlen))
989 goto efault;
990 if (__put_user(0, dirent->d_name + namlen))
991 goto efault;
992 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
993 goto efault;
994 buf->previous = dirent;
995 dirent = (void __user *)dirent + reclen;
996 buf->current_dir = dirent;
997 buf->count -= reclen;
998 return 0;
999 efault:
1000 buf->error = -EFAULT;
1001 return -EFAULT;
1002 }
1003
1004 asmlinkage long compat_sys_getdents(unsigned int fd,
1005 struct compat_linux_dirent __user *dirent, unsigned int count)
1006 {
1007 struct file * file;
1008 struct compat_linux_dirent __user * lastdirent;
1009 struct compat_getdents_callback buf;
1010 int error;
1011
1012 error = -EFAULT;
1013 if (!access_ok(VERIFY_WRITE, dirent, count))
1014 goto out;
1015
1016 error = -EBADF;
1017 file = fget(fd);
1018 if (!file)
1019 goto out;
1020
1021 buf.current_dir = dirent;
1022 buf.previous = NULL;
1023 buf.count = count;
1024 buf.error = 0;
1025
1026 error = vfs_readdir(file, compat_filldir, &buf);
1027 if (error < 0)
1028 goto out_putf;
1029 error = buf.error;
1030 lastdirent = buf.previous;
1031 if (lastdirent) {
1032 if (put_user(file->f_pos, &lastdirent->d_off))
1033 error = -EFAULT;
1034 else
1035 error = count - buf.count;
1036 }
1037
1038 out_putf:
1039 fput(file);
1040 out:
1041 return error;
1042 }
1043
1044 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1045 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1046
1047 struct compat_getdents_callback64 {
1048 struct linux_dirent64 __user *current_dir;
1049 struct linux_dirent64 __user *previous;
1050 int count;
1051 int error;
1052 };
1053
1054 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1055 ino_t ino, unsigned int d_type)
1056 {
1057 struct linux_dirent64 __user *dirent;
1058 struct compat_getdents_callback64 *buf = __buf;
1059 int jj = NAME_OFFSET(dirent);
1060 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1061 u64 off;
1062
1063 buf->error = -EINVAL; /* only used if we fail.. */
1064 if (reclen > buf->count)
1065 return -EINVAL;
1066 dirent = buf->previous;
1067
1068 if (dirent) {
1069 if (__put_user_unaligned(offset, &dirent->d_off))
1070 goto efault;
1071 }
1072 dirent = buf->current_dir;
1073 if (__put_user_unaligned(ino, &dirent->d_ino))
1074 goto efault;
1075 off = 0;
1076 if (__put_user_unaligned(off, &dirent->d_off))
1077 goto efault;
1078 if (__put_user(reclen, &dirent->d_reclen))
1079 goto efault;
1080 if (__put_user(d_type, &dirent->d_type))
1081 goto efault;
1082 if (copy_to_user(dirent->d_name, name, namlen))
1083 goto efault;
1084 if (__put_user(0, dirent->d_name + namlen))
1085 goto efault;
1086 buf->previous = dirent;
1087 dirent = (void __user *)dirent + reclen;
1088 buf->current_dir = dirent;
1089 buf->count -= reclen;
1090 return 0;
1091 efault:
1092 buf->error = -EFAULT;
1093 return -EFAULT;
1094 }
1095
1096 asmlinkage long compat_sys_getdents64(unsigned int fd,
1097 struct linux_dirent64 __user * dirent, unsigned int count)
1098 {
1099 struct file * file;
1100 struct linux_dirent64 __user * lastdirent;
1101 struct compat_getdents_callback64 buf;
1102 int error;
1103
1104 error = -EFAULT;
1105 if (!access_ok(VERIFY_WRITE, dirent, count))
1106 goto out;
1107
1108 error = -EBADF;
1109 file = fget(fd);
1110 if (!file)
1111 goto out;
1112
1113 buf.current_dir = dirent;
1114 buf.previous = NULL;
1115 buf.count = count;
1116 buf.error = 0;
1117
1118 error = vfs_readdir(file, compat_filldir64, &buf);
1119 if (error < 0)
1120 goto out_putf;
1121 error = buf.error;
1122 lastdirent = buf.previous;
1123 if (lastdirent) {
1124 typeof(lastdirent->d_off) d_off = file->f_pos;
1125 __put_user_unaligned(d_off, &lastdirent->d_off);
1126 error = count - buf.count;
1127 }
1128
1129 out_putf:
1130 fput(file);
1131 out:
1132 return error;
1133 }
1134 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1135
1136 static ssize_t compat_do_readv_writev(int type, struct file *file,
1137 const struct compat_iovec __user *uvector,
1138 unsigned long nr_segs, loff_t *pos)
1139 {
1140 typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
1141 typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
1142
1143 compat_ssize_t tot_len;
1144 struct iovec iovstack[UIO_FASTIOV];
1145 struct iovec *iov=iovstack, *vector;
1146 ssize_t ret;
1147 int seg;
1148 io_fn_t fn;
1149 iov_fn_t fnv;
1150
1151 /*
1152 * SuS says "The readv() function *may* fail if the iovcnt argument
1153 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1154 * traditionally returned zero for zero segments, so...
1155 */
1156 ret = 0;
1157 if (nr_segs == 0)
1158 goto out;
1159
1160 /*
1161 * First get the "struct iovec" from user memory and
1162 * verify all the pointers
1163 */
1164 ret = -EINVAL;
1165 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1166 goto out;
1167 if (!file->f_op)
1168 goto out;
1169 if (nr_segs > UIO_FASTIOV) {
1170 ret = -ENOMEM;
1171 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1172 if (!iov)
1173 goto out;
1174 }
1175 ret = -EFAULT;
1176 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1177 goto out;
1178
1179 /*
1180 * Single unix specification:
1181 * We should -EINVAL if an element length is not >= 0 and fitting an
1182 * ssize_t. The total length is fitting an ssize_t
1183 *
1184 * Be careful here because iov_len is a size_t not an ssize_t
1185 */
1186 tot_len = 0;
1187 vector = iov;
1188 ret = -EINVAL;
1189 for (seg = 0 ; seg < nr_segs; seg++) {
1190 compat_ssize_t tmp = tot_len;
1191 compat_ssize_t len;
1192 compat_uptr_t buf;
1193
1194 if (__get_user(len, &uvector->iov_len) ||
1195 __get_user(buf, &uvector->iov_base)) {
1196 ret = -EFAULT;
1197 goto out;
1198 }
1199 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1200 goto out;
1201 tot_len += len;
1202 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1203 goto out;
1204 vector->iov_base = compat_ptr(buf);
1205 vector->iov_len = (compat_size_t) len;
1206 uvector++;
1207 vector++;
1208 }
1209 if (tot_len == 0) {
1210 ret = 0;
1211 goto out;
1212 }
1213
1214 ret = rw_verify_area(type, file, pos, tot_len);
1215 if (ret < 0)
1216 goto out;
1217
1218 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1219 if (ret)
1220 goto out;
1221
1222 fnv = NULL;
1223 if (type == READ) {
1224 fn = file->f_op->read;
1225 fnv = file->f_op->readv;
1226 } else {
1227 fn = (io_fn_t)file->f_op->write;
1228 fnv = file->f_op->writev;
1229 }
1230 if (fnv) {
1231 ret = fnv(file, iov, nr_segs, pos);
1232 goto out;
1233 }
1234
1235 /* Do it by hand, with file-ops */
1236 ret = 0;
1237 vector = iov;
1238 while (nr_segs > 0) {
1239 void __user * base;
1240 size_t len;
1241 ssize_t nr;
1242
1243 base = vector->iov_base;
1244 len = vector->iov_len;
1245 vector++;
1246 nr_segs--;
1247
1248 nr = fn(file, base, len, pos);
1249
1250 if (nr < 0) {
1251 if (!ret) ret = nr;
1252 break;
1253 }
1254 ret += nr;
1255 if (nr != len)
1256 break;
1257 }
1258 out:
1259 if (iov != iovstack)
1260 kfree(iov);
1261 if ((ret + (type == READ)) > 0) {
1262 struct dentry *dentry = file->f_dentry;
1263 if (type == READ)
1264 fsnotify_access(dentry);
1265 else
1266 fsnotify_modify(dentry);
1267 }
1268 return ret;
1269 }
1270
1271 asmlinkage ssize_t
1272 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1273 {
1274 struct file *file;
1275 ssize_t ret = -EBADF;
1276
1277 file = fget(fd);
1278 if (!file)
1279 return -EBADF;
1280
1281 if (!(file->f_mode & FMODE_READ))
1282 goto out;
1283
1284 ret = -EINVAL;
1285 if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
1286 goto out;
1287
1288 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1289
1290 out:
1291 fput(file);
1292 return ret;
1293 }
1294
1295 asmlinkage ssize_t
1296 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1297 {
1298 struct file *file;
1299 ssize_t ret = -EBADF;
1300
1301 file = fget(fd);
1302 if (!file)
1303 return -EBADF;
1304 if (!(file->f_mode & FMODE_WRITE))
1305 goto out;
1306
1307 ret = -EINVAL;
1308 if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
1309 goto out;
1310
1311 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1312
1313 out:
1314 fput(file);
1315 return ret;
1316 }
1317
1318 /*
1319 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1320 * O_LARGEFILE flag.
1321 */
1322 asmlinkage long
1323 compat_sys_open(const char __user *filename, int flags, int mode)
1324 {
1325 return do_sys_open(AT_FDCWD, filename, flags, mode);
1326 }
1327
1328 /*
1329 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1330 * O_LARGEFILE flag.
1331 */
1332 asmlinkage long
1333 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1334 {
1335 return do_sys_open(dfd, filename, flags, mode);
1336 }
1337
1338 /*
1339 * compat_count() counts the number of arguments/envelopes. It is basically
1340 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1341 * and envp pointers.
1342 */
1343 static int compat_count(compat_uptr_t __user *argv, int max)
1344 {
1345 int i = 0;
1346
1347 if (argv != NULL) {
1348 for (;;) {
1349 compat_uptr_t p;
1350
1351 if (get_user(p, argv))
1352 return -EFAULT;
1353 if (!p)
1354 break;
1355 argv++;
1356 if(++i > max)
1357 return -E2BIG;
1358 }
1359 }
1360 return i;
1361 }
1362
1363 /*
1364 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1365 * except that it works with 32 bit argv and envp pointers.
1366 */
1367 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1368 struct linux_binprm *bprm)
1369 {
1370 struct page *kmapped_page = NULL;
1371 char *kaddr = NULL;
1372 int ret;
1373
1374 while (argc-- > 0) {
1375 compat_uptr_t str;
1376 int len;
1377 unsigned long pos;
1378
1379 if (get_user(str, argv+argc) ||
1380 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1381 ret = -EFAULT;
1382 goto out;
1383 }
1384
1385 if (bprm->p < len) {
1386 ret = -E2BIG;
1387 goto out;
1388 }
1389
1390 bprm->p -= len;
1391 /* XXX: add architecture specific overflow check here. */
1392 pos = bprm->p;
1393
1394 while (len > 0) {
1395 int i, new, err;
1396 int offset, bytes_to_copy;
1397 struct page *page;
1398
1399 offset = pos % PAGE_SIZE;
1400 i = pos/PAGE_SIZE;
1401 page = bprm->page[i];
1402 new = 0;
1403 if (!page) {
1404 page = alloc_page(GFP_HIGHUSER);
1405 bprm->page[i] = page;
1406 if (!page) {
1407 ret = -ENOMEM;
1408 goto out;
1409 }
1410 new = 1;
1411 }
1412
1413 if (page != kmapped_page) {
1414 if (kmapped_page)
1415 kunmap(kmapped_page);
1416 kmapped_page = page;
1417 kaddr = kmap(kmapped_page);
1418 }
1419 if (new && offset)
1420 memset(kaddr, 0, offset);
1421 bytes_to_copy = PAGE_SIZE - offset;
1422 if (bytes_to_copy > len) {
1423 bytes_to_copy = len;
1424 if (new)
1425 memset(kaddr+offset+len, 0,
1426 PAGE_SIZE-offset-len);
1427 }
1428 err = copy_from_user(kaddr+offset, compat_ptr(str),
1429 bytes_to_copy);
1430 if (err) {
1431 ret = -EFAULT;
1432 goto out;
1433 }
1434
1435 pos += bytes_to_copy;
1436 str += bytes_to_copy;
1437 len -= bytes_to_copy;
1438 }
1439 }
1440 ret = 0;
1441 out:
1442 if (kmapped_page)
1443 kunmap(kmapped_page);
1444 return ret;
1445 }
1446
1447 #ifdef CONFIG_MMU
1448
1449 #define free_arg_pages(bprm) do { } while (0)
1450
1451 #else
1452
1453 static inline void free_arg_pages(struct linux_binprm *bprm)
1454 {
1455 int i;
1456
1457 for (i = 0; i < MAX_ARG_PAGES; i++) {
1458 if (bprm->page[i])
1459 __free_page(bprm->page[i]);
1460 bprm->page[i] = NULL;
1461 }
1462 }
1463
1464 #endif /* CONFIG_MMU */
1465
1466 /*
1467 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1468 * that it processes 32 bit argv and envp pointers.
1469 */
1470 int compat_do_execve(char * filename,
1471 compat_uptr_t __user *argv,
1472 compat_uptr_t __user *envp,
1473 struct pt_regs * regs)
1474 {
1475 struct linux_binprm *bprm;
1476 struct file *file;
1477 int retval;
1478 int i;
1479
1480 retval = -ENOMEM;
1481 bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
1482 if (!bprm)
1483 goto out_ret;
1484 memset(bprm, 0, sizeof(*bprm));
1485
1486 file = open_exec(filename);
1487 retval = PTR_ERR(file);
1488 if (IS_ERR(file))
1489 goto out_kfree;
1490
1491 sched_exec();
1492
1493 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1494 bprm->file = file;
1495 bprm->filename = filename;
1496 bprm->interp = filename;
1497 bprm->mm = mm_alloc();
1498 retval = -ENOMEM;
1499 if (!bprm->mm)
1500 goto out_file;
1501
1502 retval = init_new_context(current, bprm->mm);
1503 if (retval < 0)
1504 goto out_mm;
1505
1506 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1507 if ((retval = bprm->argc) < 0)
1508 goto out_mm;
1509
1510 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1511 if ((retval = bprm->envc) < 0)
1512 goto out_mm;
1513
1514 retval = security_bprm_alloc(bprm);
1515 if (retval)
1516 goto out;
1517
1518 retval = prepare_binprm(bprm);
1519 if (retval < 0)
1520 goto out;
1521
1522 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1523 if (retval < 0)
1524 goto out;
1525
1526 bprm->exec = bprm->p;
1527 retval = compat_copy_strings(bprm->envc, envp, bprm);
1528 if (retval < 0)
1529 goto out;
1530
1531 retval = compat_copy_strings(bprm->argc, argv, bprm);
1532 if (retval < 0)
1533 goto out;
1534
1535 retval = search_binary_handler(bprm, regs);
1536 if (retval >= 0) {
1537 free_arg_pages(bprm);
1538
1539 /* execve success */
1540 security_bprm_free(bprm);
1541 acct_update_integrals(current);
1542 kfree(bprm);
1543 return retval;
1544 }
1545
1546 out:
1547 /* Something went wrong, return the inode and free the argument pages*/
1548 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1549 struct page * page = bprm->page[i];
1550 if (page)
1551 __free_page(page);
1552 }
1553
1554 if (bprm->security)
1555 security_bprm_free(bprm);
1556
1557 out_mm:
1558 if (bprm->mm)
1559 mmdrop(bprm->mm);
1560
1561 out_file:
1562 if (bprm->file) {
1563 allow_write_access(bprm->file);
1564 fput(bprm->file);
1565 }
1566
1567 out_kfree:
1568 kfree(bprm);
1569
1570 out_ret:
1571 return retval;
1572 }
1573
1574 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1575
1576 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1577
1578 /*
1579 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1580 * 64-bit unsigned longs.
1581 */
1582 static
1583 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1584 unsigned long *fdset)
1585 {
1586 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1587 if (ufdset) {
1588 unsigned long odd;
1589
1590 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1591 return -EFAULT;
1592
1593 odd = nr & 1UL;
1594 nr &= ~1UL;
1595 while (nr) {
1596 unsigned long h, l;
1597 __get_user(l, ufdset);
1598 __get_user(h, ufdset+1);
1599 ufdset += 2;
1600 *fdset++ = h << 32 | l;
1601 nr -= 2;
1602 }
1603 if (odd)
1604 __get_user(*fdset, ufdset);
1605 } else {
1606 /* Tricky, must clear full unsigned long in the
1607 * kernel fdset at the end, this makes sure that
1608 * actually happens.
1609 */
1610 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1611 }
1612 return 0;
1613 }
1614
1615 static
1616 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1617 unsigned long *fdset)
1618 {
1619 unsigned long odd;
1620 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1621
1622 if (!ufdset)
1623 return;
1624
1625 odd = nr & 1UL;
1626 nr &= ~1UL;
1627 while (nr) {
1628 unsigned long h, l;
1629 l = *fdset++;
1630 h = l >> 32;
1631 __put_user(l, ufdset);
1632 __put_user(h, ufdset+1);
1633 ufdset += 2;
1634 nr -= 2;
1635 }
1636 if (odd)
1637 __put_user(*fdset, ufdset);
1638 }
1639
1640
1641 /*
1642 * This is a virtual copy of sys_select from fs/select.c and probably
1643 * should be compared to it from time to time
1644 */
1645 static void *select_bits_alloc(int size)
1646 {
1647 return kmalloc(6 * size, GFP_KERNEL);
1648 }
1649
1650 static void select_bits_free(void *bits, int size)
1651 {
1652 kfree(bits);
1653 }
1654
1655 /*
1656 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1657 * like to be certain this leads to no problems. So I return
1658 * EINTR just for safety.
1659 *
1660 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1661 * I'm trying ERESTARTNOHAND which restart only when you want to.
1662 */
1663 #define MAX_SELECT_SECONDS \
1664 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1665
1666 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1667 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1668 {
1669 fd_set_bits fds;
1670 char *bits;
1671 int size, max_fdset, ret = -EINVAL;
1672 struct fdtable *fdt;
1673
1674 if (n < 0)
1675 goto out_nofds;
1676
1677 /* max_fdset can increase, so grab it once to avoid race */
1678 rcu_read_lock();
1679 fdt = files_fdtable(current->files);
1680 max_fdset = fdt->max_fdset;
1681 rcu_read_unlock();
1682 if (n > max_fdset)
1683 n = max_fdset;
1684
1685 /*
1686 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1687 * since we used fdset we need to allocate memory in units of
1688 * long-words.
1689 */
1690 ret = -ENOMEM;
1691 size = FDS_BYTES(n);
1692 bits = select_bits_alloc(size);
1693 if (!bits)
1694 goto out_nofds;
1695 fds.in = (unsigned long *) bits;
1696 fds.out = (unsigned long *) (bits + size);
1697 fds.ex = (unsigned long *) (bits + 2*size);
1698 fds.res_in = (unsigned long *) (bits + 3*size);
1699 fds.res_out = (unsigned long *) (bits + 4*size);
1700 fds.res_ex = (unsigned long *) (bits + 5*size);
1701
1702 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1703 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1704 (ret = compat_get_fd_set(n, exp, fds.ex)))
1705 goto out;
1706 zero_fd_set(n, fds.res_in);
1707 zero_fd_set(n, fds.res_out);
1708 zero_fd_set(n, fds.res_ex);
1709
1710 ret = do_select(n, &fds, timeout);
1711
1712 if (ret < 0)
1713 goto out;
1714 if (!ret) {
1715 ret = -ERESTARTNOHAND;
1716 if (signal_pending(current))
1717 goto out;
1718 ret = 0;
1719 }
1720
1721 compat_set_fd_set(n, inp, fds.res_in);
1722 compat_set_fd_set(n, outp, fds.res_out);
1723 compat_set_fd_set(n, exp, fds.res_ex);
1724
1725 out:
1726 select_bits_free(bits, size);
1727 out_nofds:
1728 return ret;
1729 }
1730
1731 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1732 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1733 struct compat_timeval __user *tvp)
1734 {
1735 s64 timeout = -1;
1736 struct compat_timeval tv;
1737 int ret;
1738
1739 if (tvp) {
1740 if (copy_from_user(&tv, tvp, sizeof(tv)))
1741 return -EFAULT;
1742
1743 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1744 return -EINVAL;
1745
1746 /* Cast to u64 to make GCC stop complaining */
1747 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1748 timeout = -1; /* infinite */
1749 else {
1750 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1751 timeout += tv.tv_sec * HZ;
1752 }
1753 }
1754
1755 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1756
1757 if (tvp) {
1758 struct compat_timeval rtv;
1759
1760 if (current->personality & STICKY_TIMEOUTS)
1761 goto sticky;
1762 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1763 rtv.tv_sec = timeout;
1764 if (compat_timeval_compare(&rtv, &tv) >= 0)
1765 rtv = tv;
1766 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1767 sticky:
1768 /*
1769 * If an application puts its timeval in read-only
1770 * memory, we don't want the Linux-specific update to
1771 * the timeval to cause a fault after the select has
1772 * completed successfully. However, because we're not
1773 * updating the timeval, we can't restart the system
1774 * call.
1775 */
1776 if (ret == -ERESTARTNOHAND)
1777 ret = -EINTR;
1778 }
1779 }
1780
1781 return ret;
1782 }
1783
1784 #ifdef TIF_RESTORE_SIGMASK
1785 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1786 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1787 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1788 compat_size_t sigsetsize)
1789 {
1790 compat_sigset_t ss32;
1791 sigset_t ksigmask, sigsaved;
1792 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1793 struct compat_timespec ts;
1794 int ret;
1795
1796 if (tsp) {
1797 if (copy_from_user(&ts, tsp, sizeof(ts)))
1798 return -EFAULT;
1799
1800 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1801 return -EINVAL;
1802 }
1803
1804 if (sigmask) {
1805 if (sigsetsize != sizeof(compat_sigset_t))
1806 return -EINVAL;
1807 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1808 return -EFAULT;
1809 sigset_from_compat(&ksigmask, &ss32);
1810
1811 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1812 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1813 }
1814
1815 do {
1816 if (tsp) {
1817 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1818 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1819 timeout += ts.tv_sec * (unsigned long)HZ;
1820 ts.tv_sec = 0;
1821 ts.tv_nsec = 0;
1822 } else {
1823 ts.tv_sec -= MAX_SELECT_SECONDS;
1824 timeout = MAX_SELECT_SECONDS * HZ;
1825 }
1826 }
1827
1828 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1829
1830 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1831
1832 if (tsp && !(current->personality & STICKY_TIMEOUTS)) {
1833 struct compat_timespec rts;
1834
1835 rts.tv_sec = timeout / HZ;
1836 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1837 if (rts.tv_nsec >= NSEC_PER_SEC) {
1838 rts.tv_sec++;
1839 rts.tv_nsec -= NSEC_PER_SEC;
1840 }
1841 if (compat_timespec_compare(&rts, &ts) >= 0)
1842 rts = ts;
1843 copy_to_user(tsp, &rts, sizeof(rts));
1844 }
1845
1846 if (ret == -ERESTARTNOHAND) {
1847 /*
1848 * Don't restore the signal mask yet. Let do_signal() deliver
1849 * the signal on the way back to userspace, before the signal
1850 * mask is restored.
1851 */
1852 if (sigmask) {
1853 memcpy(&current->saved_sigmask, &sigsaved,
1854 sizeof(sigsaved));
1855 set_thread_flag(TIF_RESTORE_SIGMASK);
1856 }
1857 } else if (sigmask)
1858 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1859
1860 return ret;
1861 }
1862
1863 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1864 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1865 struct compat_timespec __user *tsp, void __user *sig)
1866 {
1867 compat_size_t sigsetsize = 0;
1868 compat_uptr_t up = 0;
1869
1870 if (sig) {
1871 if (!access_ok(VERIFY_READ, sig,
1872 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1873 __get_user(up, (compat_uptr_t __user *)sig) ||
1874 __get_user(sigsetsize,
1875 (compat_size_t __user *)(sig+sizeof(up))))
1876 return -EFAULT;
1877 }
1878 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1879 sigsetsize);
1880 }
1881
1882 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1883 unsigned int nfds, struct compat_timespec __user *tsp,
1884 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1885 {
1886 compat_sigset_t ss32;
1887 sigset_t ksigmask, sigsaved;
1888 struct compat_timespec ts;
1889 s64 timeout = -1;
1890 int ret;
1891
1892 if (tsp) {
1893 if (copy_from_user(&ts, tsp, sizeof(ts)))
1894 return -EFAULT;
1895
1896 /* We assume that ts.tv_sec is always lower than
1897 the number of seconds that can be expressed in
1898 an s64. Otherwise the compiler bitches at us */
1899 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1900 timeout += ts.tv_sec * HZ;
1901 }
1902
1903 if (sigmask) {
1904 if (sigsetsize != sizeof(compat_sigset_t))
1905 return -EINVAL;
1906 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1907 return -EFAULT;
1908 sigset_from_compat(&ksigmask, &ss32);
1909
1910 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1911 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1912 }
1913
1914 ret = do_sys_poll(ufds, nfds, &timeout);
1915
1916 /* We can restart this syscall, usually */
1917 if (ret == -EINTR) {
1918 /*
1919 * Don't restore the signal mask yet. Let do_signal() deliver
1920 * the signal on the way back to userspace, before the signal
1921 * mask is restored.
1922 */
1923 if (sigmask) {
1924 memcpy(&current->saved_sigmask, &sigsaved,
1925 sizeof(sigsaved));
1926 set_thread_flag(TIF_RESTORE_SIGMASK);
1927 }
1928 ret = -ERESTARTNOHAND;
1929 } else if (sigmask)
1930 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1931
1932 if (tsp && timeout >= 0) {
1933 struct compat_timespec rts;
1934
1935 if (current->personality & STICKY_TIMEOUTS)
1936 goto sticky;
1937 /* Yes, we know it's actually an s64, but it's also positive. */
1938 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1939 1000;
1940 rts.tv_sec = timeout;
1941 if (compat_timespec_compare(&rts, &ts) >= 0)
1942 rts = ts;
1943 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1944 sticky:
1945 /*
1946 * If an application puts its timeval in read-only
1947 * memory, we don't want the Linux-specific update to
1948 * the timeval to cause a fault after the select has
1949 * completed successfully. However, because we're not
1950 * updating the timeval, we can't restart the system
1951 * call.
1952 */
1953 if (ret == -ERESTARTNOHAND && timeout >= 0)
1954 ret = -EINTR;
1955 }
1956 }
1957
1958 return ret;
1959 }
1960 #endif /* TIF_RESTORE_SIGMASK */
1961
1962 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1963 /* Stuff for NFS server syscalls... */
1964 struct compat_nfsctl_svc {
1965 u16 svc32_port;
1966 s32 svc32_nthreads;
1967 };
1968
1969 struct compat_nfsctl_client {
1970 s8 cl32_ident[NFSCLNT_IDMAX+1];
1971 s32 cl32_naddr;
1972 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1973 s32 cl32_fhkeytype;
1974 s32 cl32_fhkeylen;
1975 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1976 };
1977
1978 struct compat_nfsctl_export {
1979 char ex32_client[NFSCLNT_IDMAX+1];
1980 char ex32_path[NFS_MAXPATHLEN+1];
1981 compat_dev_t ex32_dev;
1982 compat_ino_t ex32_ino;
1983 compat_int_t ex32_flags;
1984 __compat_uid_t ex32_anon_uid;
1985 __compat_gid_t ex32_anon_gid;
1986 };
1987
1988 struct compat_nfsctl_fdparm {
1989 struct sockaddr gd32_addr;
1990 s8 gd32_path[NFS_MAXPATHLEN+1];
1991 compat_int_t gd32_version;
1992 };
1993
1994 struct compat_nfsctl_fsparm {
1995 struct sockaddr gd32_addr;
1996 s8 gd32_path[NFS_MAXPATHLEN+1];
1997 compat_int_t gd32_maxlen;
1998 };
1999
2000 struct compat_nfsctl_arg {
2001 compat_int_t ca32_version; /* safeguard */
2002 union {
2003 struct compat_nfsctl_svc u32_svc;
2004 struct compat_nfsctl_client u32_client;
2005 struct compat_nfsctl_export u32_export;
2006 struct compat_nfsctl_fdparm u32_getfd;
2007 struct compat_nfsctl_fsparm u32_getfs;
2008 } u;
2009 #define ca32_svc u.u32_svc
2010 #define ca32_client u.u32_client
2011 #define ca32_export u.u32_export
2012 #define ca32_getfd u.u32_getfd
2013 #define ca32_getfs u.u32_getfs
2014 };
2015
2016 union compat_nfsctl_res {
2017 __u8 cr32_getfh[NFS_FHSIZE];
2018 struct knfsd_fh cr32_getfs;
2019 };
2020
2021 static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2022 {
2023 int err;
2024
2025 err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
2026 err |= get_user(karg->ca_version, &arg->ca32_version);
2027 err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
2028 err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
2029 return (err) ? -EFAULT : 0;
2030 }
2031
2032 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2033 {
2034 int err;
2035
2036 err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
2037 err |= get_user(karg->ca_version, &arg->ca32_version);
2038 err |= __copy_from_user(&karg->ca_client.cl_ident[0],
2039 &arg->ca32_client.cl32_ident[0],
2040 NFSCLNT_IDMAX);
2041 err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
2042 err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
2043 &arg->ca32_client.cl32_addrlist[0],
2044 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
2045 err |= __get_user(karg->ca_client.cl_fhkeytype,
2046 &arg->ca32_client.cl32_fhkeytype);
2047 err |= __get_user(karg->ca_client.cl_fhkeylen,
2048 &arg->ca32_client.cl32_fhkeylen);
2049 err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
2050 &arg->ca32_client.cl32_fhkey[0],
2051 NFSCLNT_KEYMAX);
2052
2053 return (err) ? -EFAULT : 0;
2054 }
2055
2056 static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2057 {
2058 int err;
2059
2060 err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
2061 err |= get_user(karg->ca_version, &arg->ca32_version);
2062 err |= __copy_from_user(&karg->ca_export.ex_client[0],
2063 &arg->ca32_export.ex32_client[0],
2064 NFSCLNT_IDMAX);
2065 err |= __copy_from_user(&karg->ca_export.ex_path[0],
2066 &arg->ca32_export.ex32_path[0],
2067 NFS_MAXPATHLEN);
2068 err |= __get_user(karg->ca_export.ex_dev,
2069 &arg->ca32_export.ex32_dev);
2070 err |= __get_user(karg->ca_export.ex_ino,
2071 &arg->ca32_export.ex32_ino);
2072 err |= __get_user(karg->ca_export.ex_flags,
2073 &arg->ca32_export.ex32_flags);
2074 err |= __get_user(karg->ca_export.ex_anon_uid,
2075 &arg->ca32_export.ex32_anon_uid);
2076 err |= __get_user(karg->ca_export.ex_anon_gid,
2077 &arg->ca32_export.ex32_anon_gid);
2078 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2079 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2080
2081 return (err) ? -EFAULT : 0;
2082 }
2083
2084 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2085 {
2086 int err;
2087
2088 err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
2089 err |= get_user(karg->ca_version, &arg->ca32_version);
2090 err |= __copy_from_user(&karg->ca_getfd.gd_addr,
2091 &arg->ca32_getfd.gd32_addr,
2092 (sizeof(struct sockaddr)));
2093 err |= __copy_from_user(&karg->ca_getfd.gd_path,
2094 &arg->ca32_getfd.gd32_path,
2095 (NFS_MAXPATHLEN+1));
2096 err |= __get_user(karg->ca_getfd.gd_version,
2097 &arg->ca32_getfd.gd32_version);
2098
2099 return (err) ? -EFAULT : 0;
2100 }
2101
2102 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2103 {
2104 int err;
2105
2106 err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
2107 err |= get_user(karg->ca_version, &arg->ca32_version);
2108 err |= __copy_from_user(&karg->ca_getfs.gd_addr,
2109 &arg->ca32_getfs.gd32_addr,
2110 (sizeof(struct sockaddr)));
2111 err |= __copy_from_user(&karg->ca_getfs.gd_path,
2112 &arg->ca32_getfs.gd32_path,
2113 (NFS_MAXPATHLEN+1));
2114 err |= __get_user(karg->ca_getfs.gd_maxlen,
2115 &arg->ca32_getfs.gd32_maxlen);
2116
2117 return (err) ? -EFAULT : 0;
2118 }
2119
2120 /* This really doesn't need translations, we are only passing
2121 * back a union which contains opaque nfs file handle data.
2122 */
2123 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
2124 {
2125 int err;
2126
2127 err = copy_to_user(res, kres, sizeof(*res));
2128
2129 return (err) ? -EFAULT : 0;
2130 }
2131
2132 asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
2133 union compat_nfsctl_res __user *res)
2134 {
2135 struct nfsctl_arg *karg;
2136 union nfsctl_res *kres;
2137 mm_segment_t oldfs;
2138 int err;
2139
2140 karg = kmalloc(sizeof(*karg), GFP_USER);
2141 kres = kmalloc(sizeof(*kres), GFP_USER);
2142 if(!karg || !kres) {
2143 err = -ENOMEM;
2144 goto done;
2145 }
2146
2147 switch(cmd) {
2148 case NFSCTL_SVC:
2149 err = compat_nfs_svc_trans(karg, arg);
2150 break;
2151
2152 case NFSCTL_ADDCLIENT:
2153 err = compat_nfs_clnt_trans(karg, arg);
2154 break;
2155
2156 case NFSCTL_DELCLIENT:
2157 err = compat_nfs_clnt_trans(karg, arg);
2158 break;
2159
2160 case NFSCTL_EXPORT:
2161 case NFSCTL_UNEXPORT:
2162 err = compat_nfs_exp_trans(karg, arg);
2163 break;
2164
2165 case NFSCTL_GETFD:
2166 err = compat_nfs_getfd_trans(karg, arg);
2167 break;
2168
2169 case NFSCTL_GETFS:
2170 err = compat_nfs_getfs_trans(karg, arg);
2171 break;
2172
2173 default:
2174 err = -EINVAL;
2175 goto done;
2176 }
2177
2178 oldfs = get_fs();
2179 set_fs(KERNEL_DS);
2180 /* The __user pointer casts are valid because of the set_fs() */
2181 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2182 set_fs(oldfs);
2183
2184 if (err)
2185 goto done;
2186
2187 if((cmd == NFSCTL_GETFD) ||
2188 (cmd == NFSCTL_GETFS))
2189 err = compat_nfs_getfh_res_trans(kres, res);
2190
2191 done:
2192 kfree(karg);
2193 kfree(kres);
2194 return err;
2195 }
2196 #else /* !NFSD */
2197 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2198 {
2199 return sys_ni_syscall();
2200 }
2201 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree