4 * Kernel compatibililty routines for e.g. 32 bit syscall support
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)
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.
18 #include <linux/kernel.h>
19 #include <linux/linkage.h>
20 #include <linux/compat.h>
21 #include <linux/errno.h>
22 #include <linux/time.h>
24 #include <linux/fcntl.h>
25 #include <linux/namei.h>
26 #include <linux/file.h>
27 #include <linux/fdtable.h>
28 #include <linux/vfs.h>
29 #include <linux/ioctl.h>
30 #include <linux/init.h>
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/tsacct_kern.h>
48 #include <linux/security.h>
49 #include <linux/highmem.h>
50 #include <linux/signal.h>
51 #include <linux/poll.h>
53 #include <linux/eventpoll.h>
55 #include <asm/uaccess.h>
56 #include <asm/mmu_context.h>
57 #include <asm/ioctls.h>
62 int compat_printk(const char *fmt
, ...)
69 ret
= vprintk(fmt
, ap
);
74 #include "read_write.h"
77 * Not all architectures have sys_utime, so implement this in terms
80 asmlinkage
long compat_sys_utime(char __user
*filename
, struct compat_utimbuf __user
*t
)
82 struct timespec tv
[2];
85 if (get_user(tv
[0].tv_sec
, &t
->actime
) ||
86 get_user(tv
[1].tv_sec
, &t
->modtime
))
91 return do_utimes(AT_FDCWD
, filename
, t
? tv
: NULL
, 0);
94 asmlinkage
long compat_sys_utimensat(unsigned int dfd
, char __user
*filename
, struct compat_timespec __user
*t
, int flags
)
96 struct timespec tv
[2];
99 if (get_compat_timespec(&tv
[0], &t
[0]) ||
100 get_compat_timespec(&tv
[1], &t
[1]))
103 if ((tv
[0].tv_nsec
== UTIME_OMIT
|| tv
[0].tv_nsec
== UTIME_NOW
)
104 && tv
[0].tv_sec
!= 0)
106 if ((tv
[1].tv_nsec
== UTIME_OMIT
|| tv
[1].tv_nsec
== UTIME_NOW
)
107 && tv
[1].tv_sec
!= 0)
110 if (tv
[0].tv_nsec
== UTIME_OMIT
&& tv
[1].tv_nsec
== UTIME_OMIT
)
113 return do_utimes(dfd
, filename
, t
? tv
: NULL
, flags
);
116 asmlinkage
long compat_sys_futimesat(unsigned int dfd
, char __user
*filename
, struct compat_timeval __user
*t
)
118 struct timespec tv
[2];
121 if (get_user(tv
[0].tv_sec
, &t
[0].tv_sec
) ||
122 get_user(tv
[0].tv_nsec
, &t
[0].tv_usec
) ||
123 get_user(tv
[1].tv_sec
, &t
[1].tv_sec
) ||
124 get_user(tv
[1].tv_nsec
, &t
[1].tv_usec
))
126 if (tv
[0].tv_nsec
>= 1000000 || tv
[0].tv_nsec
< 0 ||
127 tv
[1].tv_nsec
>= 1000000 || tv
[1].tv_nsec
< 0)
129 tv
[0].tv_nsec
*= 1000;
130 tv
[1].tv_nsec
*= 1000;
132 return do_utimes(dfd
, filename
, t
? tv
: NULL
, 0);
135 asmlinkage
long compat_sys_utimes(char __user
*filename
, struct compat_timeval __user
*t
)
137 return compat_sys_futimesat(AT_FDCWD
, filename
, t
);
140 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
142 compat_ino_t ino
= stat
->ino
;
143 typeof(ubuf
->st_uid
) uid
= 0;
144 typeof(ubuf
->st_gid
) gid
= 0;
147 SET_UID(uid
, stat
->uid
);
148 SET_GID(gid
, stat
->gid
);
150 if ((u64
) stat
->size
> MAX_NON_LFS
||
151 !old_valid_dev(stat
->dev
) ||
152 !old_valid_dev(stat
->rdev
))
154 if (sizeof(ino
) < sizeof(stat
->ino
) && ino
!= stat
->ino
)
157 if (clear_user(ubuf
, sizeof(*ubuf
)))
160 err
= __put_user(old_encode_dev(stat
->dev
), &ubuf
->st_dev
);
161 err
|= __put_user(ino
, &ubuf
->st_ino
);
162 err
|= __put_user(stat
->mode
, &ubuf
->st_mode
);
163 err
|= __put_user(stat
->nlink
, &ubuf
->st_nlink
);
164 err
|= __put_user(uid
, &ubuf
->st_uid
);
165 err
|= __put_user(gid
, &ubuf
->st_gid
);
166 err
|= __put_user(old_encode_dev(stat
->rdev
), &ubuf
->st_rdev
);
167 err
|= __put_user(stat
->size
, &ubuf
->st_size
);
168 err
|= __put_user(stat
->atime
.tv_sec
, &ubuf
->st_atime
);
169 err
|= __put_user(stat
->atime
.tv_nsec
, &ubuf
->st_atime_nsec
);
170 err
|= __put_user(stat
->mtime
.tv_sec
, &ubuf
->st_mtime
);
171 err
|= __put_user(stat
->mtime
.tv_nsec
, &ubuf
->st_mtime_nsec
);
172 err
|= __put_user(stat
->ctime
.tv_sec
, &ubuf
->st_ctime
);
173 err
|= __put_user(stat
->ctime
.tv_nsec
, &ubuf
->st_ctime_nsec
);
174 err
|= __put_user(stat
->blksize
, &ubuf
->st_blksize
);
175 err
|= __put_user(stat
->blocks
, &ubuf
->st_blocks
);
179 asmlinkage
long compat_sys_newstat(char __user
* filename
,
180 struct compat_stat __user
*statbuf
)
183 int error
= vfs_stat_fd(AT_FDCWD
, filename
, &stat
);
186 error
= cp_compat_stat(&stat
, statbuf
);
190 asmlinkage
long compat_sys_newlstat(char __user
* filename
,
191 struct compat_stat __user
*statbuf
)
194 int error
= vfs_lstat_fd(AT_FDCWD
, filename
, &stat
);
197 error
= cp_compat_stat(&stat
, statbuf
);
201 #ifndef __ARCH_WANT_STAT64
202 asmlinkage
long compat_sys_newfstatat(unsigned int dfd
, char __user
*filename
,
203 struct compat_stat __user
*statbuf
, int flag
)
208 if ((flag
& ~AT_SYMLINK_NOFOLLOW
) != 0)
211 if (flag
& AT_SYMLINK_NOFOLLOW
)
212 error
= vfs_lstat_fd(dfd
, filename
, &stat
);
214 error
= vfs_stat_fd(dfd
, filename
, &stat
);
217 error
= cp_compat_stat(&stat
, statbuf
);
224 asmlinkage
long compat_sys_newfstat(unsigned int fd
,
225 struct compat_stat __user
* statbuf
)
228 int error
= vfs_fstat(fd
, &stat
);
231 error
= cp_compat_stat(&stat
, statbuf
);
235 static int put_compat_statfs(struct compat_statfs __user
*ubuf
, struct kstatfs
*kbuf
)
238 if (sizeof ubuf
->f_blocks
== 4) {
239 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
240 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
242 /* f_files and f_ffree may be -1; it's okay
243 * to stuff that into 32 bits */
244 if (kbuf
->f_files
!= 0xffffffffffffffffULL
245 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
247 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
248 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
251 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
252 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
253 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
254 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
255 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
256 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
257 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
258 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
259 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
260 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
261 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
262 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
) ||
263 __put_user(0, &ubuf
->f_spare
[0]) ||
264 __put_user(0, &ubuf
->f_spare
[1]) ||
265 __put_user(0, &ubuf
->f_spare
[2]) ||
266 __put_user(0, &ubuf
->f_spare
[3]) ||
267 __put_user(0, &ubuf
->f_spare
[4]))
273 * The following statfs calls are copies of code from fs/open.c and
274 * should be checked against those from time to time
276 asmlinkage
long compat_sys_statfs(const char __user
*pathname
, struct compat_statfs __user
*buf
)
281 error
= user_path(pathname
, &path
);
284 error
= vfs_statfs(path
.dentry
, &tmp
);
286 error
= put_compat_statfs(buf
, &tmp
);
292 asmlinkage
long compat_sys_fstatfs(unsigned int fd
, struct compat_statfs __user
*buf
)
302 error
= vfs_statfs(file
->f_path
.dentry
, &tmp
);
304 error
= put_compat_statfs(buf
, &tmp
);
310 static int put_compat_statfs64(struct compat_statfs64 __user
*ubuf
, struct kstatfs
*kbuf
)
312 if (sizeof ubuf
->f_blocks
== 4) {
313 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
314 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
316 /* f_files and f_ffree may be -1; it's okay
317 * to stuff that into 32 bits */
318 if (kbuf
->f_files
!= 0xffffffffffffffffULL
319 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
321 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
322 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
325 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
326 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
327 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
328 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
329 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
330 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
331 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
332 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
333 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
334 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
335 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
336 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
))
341 asmlinkage
long compat_sys_statfs64(const char __user
*pathname
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
346 if (sz
!= sizeof(*buf
))
349 error
= user_path(pathname
, &path
);
352 error
= vfs_statfs(path
.dentry
, &tmp
);
354 error
= put_compat_statfs64(buf
, &tmp
);
360 asmlinkage
long compat_sys_fstatfs64(unsigned int fd
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
366 if (sz
!= sizeof(*buf
))
373 error
= vfs_statfs(file
->f_path
.dentry
, &tmp
);
375 error
= put_compat_statfs64(buf
, &tmp
);
382 * This is a copy of sys_ustat, just dealing with a structure layout.
383 * Given how simple this syscall is that apporach is more maintainable
384 * than the various conversion hacks.
386 asmlinkage
long compat_sys_ustat(unsigned dev
, struct compat_ustat __user
*u
)
388 struct super_block
*sb
;
389 struct compat_ustat tmp
;
393 sb
= user_get_super(new_decode_dev(dev
));
396 err
= vfs_statfs(sb
->s_root
, &sbuf
);
401 memset(&tmp
, 0, sizeof(struct compat_ustat
));
402 tmp
.f_tfree
= sbuf
.f_bfree
;
403 tmp
.f_tinode
= sbuf
.f_ffree
;
404 if (copy_to_user(u
, &tmp
, sizeof(struct compat_ustat
)))
409 static int get_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
411 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
412 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
413 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
414 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
415 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
416 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
421 static int put_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
423 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
424 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
425 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
426 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
427 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
428 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
433 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
434 static int get_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
436 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
437 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
438 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
439 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
440 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
441 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
447 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
448 static int put_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
450 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
451 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
452 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
453 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
454 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
455 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
461 asmlinkage
long compat_sys_fcntl64(unsigned int fd
, unsigned int cmd
,
472 ret
= get_compat_flock(&f
, compat_ptr(arg
));
477 ret
= sys_fcntl(fd
, cmd
, (unsigned long)&f
);
479 if (cmd
== F_GETLK
&& ret
== 0) {
480 /* GETLK was successfule and we need to return the data...
481 * but it needs to fit in the compat structure.
482 * l_start shouldn't be too big, unless the original
483 * start + end is greater than COMPAT_OFF_T_MAX, in which
484 * case the app was asking for trouble, so we return
485 * -EOVERFLOW in that case.
486 * l_len could be too big, in which case we just truncate it,
487 * and only allow the app to see that part of the conflicting
488 * lock that might make sense to it anyway
491 if (f
.l_start
> COMPAT_OFF_T_MAX
)
493 if (f
.l_len
> COMPAT_OFF_T_MAX
)
494 f
.l_len
= COMPAT_OFF_T_MAX
;
496 ret
= put_compat_flock(&f
, compat_ptr(arg
));
503 ret
= get_compat_flock64(&f
, compat_ptr(arg
));
508 ret
= sys_fcntl(fd
, (cmd
== F_GETLK64
) ? F_GETLK
:
509 ((cmd
== F_SETLK64
) ? F_SETLK
: F_SETLKW
),
512 if (cmd
== F_GETLK64
&& ret
== 0) {
513 /* need to return lock information - see above for commentary */
514 if (f
.l_start
> COMPAT_LOFF_T_MAX
)
516 if (f
.l_len
> COMPAT_LOFF_T_MAX
)
517 f
.l_len
= COMPAT_LOFF_T_MAX
;
519 ret
= put_compat_flock64(&f
, compat_ptr(arg
));
524 ret
= sys_fcntl(fd
, cmd
, arg
);
530 asmlinkage
long compat_sys_fcntl(unsigned int fd
, unsigned int cmd
,
533 if ((cmd
== F_GETLK64
) || (cmd
== F_SETLK64
) || (cmd
== F_SETLKW64
))
535 return compat_sys_fcntl64(fd
, cmd
, arg
);
539 compat_sys_io_setup(unsigned nr_reqs
, u32 __user
*ctx32p
)
544 mm_segment_t oldfs
= get_fs();
545 if (unlikely(get_user(ctx64
, ctx32p
)))
549 /* The __user pointer cast is valid because of the set_fs() */
550 ret
= sys_io_setup(nr_reqs
, (aio_context_t __user
*) &ctx64
);
552 /* truncating is ok because it's a user address */
554 ret
= put_user((u32
) ctx64
, ctx32p
);
559 compat_sys_io_getevents(aio_context_t ctx_id
,
560 unsigned long min_nr
,
562 struct io_event __user
*events
,
563 struct compat_timespec __user
*timeout
)
567 struct timespec __user
*ut
= NULL
;
570 if (unlikely(!access_ok(VERIFY_WRITE
, events
,
571 nr
* sizeof(struct io_event
))))
574 if (get_compat_timespec(&t
, timeout
))
577 ut
= compat_alloc_user_space(sizeof(*ut
));
578 if (copy_to_user(ut
, &t
, sizeof(t
)) )
581 ret
= sys_io_getevents(ctx_id
, min_nr
, nr
, events
, ut
);
587 copy_iocb(long nr
, u32 __user
*ptr32
, struct iocb __user
* __user
*ptr64
)
592 for (i
= 0; i
< nr
; ++i
) {
593 if (get_user(uptr
, ptr32
+ i
))
595 if (put_user(compat_ptr(uptr
), ptr64
+ i
))
601 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
604 compat_sys_io_submit(aio_context_t ctx_id
, int nr
, u32 __user
*iocb
)
606 struct iocb __user
* __user
*iocb64
;
609 if (unlikely(nr
< 0))
612 if (nr
> MAX_AIO_SUBMITS
)
613 nr
= MAX_AIO_SUBMITS
;
615 iocb64
= compat_alloc_user_space(nr
* sizeof(*iocb64
));
616 ret
= copy_iocb(nr
, iocb
, iocb64
);
618 ret
= sys_io_submit(ctx_id
, nr
, iocb64
);
622 struct compat_ncp_mount_data
{
623 compat_int_t version
;
624 compat_uint_t ncp_fd
;
625 __compat_uid_t mounted_uid
;
626 compat_pid_t wdog_pid
;
627 unsigned char mounted_vol
[NCP_VOLNAME_LEN
+ 1];
628 compat_uint_t time_out
;
629 compat_uint_t retry_count
;
633 compat_mode_t file_mode
;
634 compat_mode_t dir_mode
;
637 struct compat_ncp_mount_data_v4
{
638 compat_int_t version
;
639 compat_ulong_t flags
;
640 compat_ulong_t mounted_uid
;
641 compat_long_t wdog_pid
;
642 compat_uint_t ncp_fd
;
643 compat_uint_t time_out
;
644 compat_uint_t retry_count
;
647 compat_ulong_t file_mode
;
648 compat_ulong_t dir_mode
;
651 static void *do_ncp_super_data_conv(void *raw_data
)
653 int version
= *(unsigned int *)raw_data
;
656 struct compat_ncp_mount_data
*c_n
= raw_data
;
657 struct ncp_mount_data
*n
= raw_data
;
659 n
->dir_mode
= c_n
->dir_mode
;
660 n
->file_mode
= c_n
->file_mode
;
663 memmove (n
->mounted_vol
, c_n
->mounted_vol
, (sizeof (c_n
->mounted_vol
) + 3 * sizeof (unsigned int)));
664 n
->wdog_pid
= c_n
->wdog_pid
;
665 n
->mounted_uid
= c_n
->mounted_uid
;
666 } else if (version
== 4) {
667 struct compat_ncp_mount_data_v4
*c_n
= raw_data
;
668 struct ncp_mount_data_v4
*n
= raw_data
;
670 n
->dir_mode
= c_n
->dir_mode
;
671 n
->file_mode
= c_n
->file_mode
;
674 n
->retry_count
= c_n
->retry_count
;
675 n
->time_out
= c_n
->time_out
;
676 n
->ncp_fd
= c_n
->ncp_fd
;
677 n
->wdog_pid
= c_n
->wdog_pid
;
678 n
->mounted_uid
= c_n
->mounted_uid
;
679 n
->flags
= c_n
->flags
;
680 } else if (version
!= 5) {
687 struct compat_smb_mount_data
{
688 compat_int_t version
;
689 __compat_uid_t mounted_uid
;
692 compat_mode_t file_mode
;
693 compat_mode_t dir_mode
;
696 static void *do_smb_super_data_conv(void *raw_data
)
698 struct smb_mount_data
*s
= raw_data
;
699 struct compat_smb_mount_data
*c_s
= raw_data
;
701 if (c_s
->version
!= SMB_MOUNT_OLDVERSION
)
703 s
->dir_mode
= c_s
->dir_mode
;
704 s
->file_mode
= c_s
->file_mode
;
707 s
->mounted_uid
= c_s
->mounted_uid
;
712 struct compat_nfs_string
{
717 static inline void compat_nfs_string(struct nfs_string
*dst
,
718 struct compat_nfs_string
*src
)
720 dst
->data
= compat_ptr(src
->data
);
724 struct compat_nfs4_mount_data_v1
{
725 compat_int_t version
;
730 compat_int_t retrans
;
731 compat_int_t acregmin
;
732 compat_int_t acregmax
;
733 compat_int_t acdirmin
;
734 compat_int_t acdirmax
;
735 struct compat_nfs_string client_addr
;
736 struct compat_nfs_string mnt_path
;
737 struct compat_nfs_string hostname
;
738 compat_uint_t host_addrlen
;
739 compat_uptr_t host_addr
;
741 compat_int_t auth_flavourlen
;
742 compat_uptr_t auth_flavours
;
745 static int do_nfs4_super_data_conv(void *raw_data
)
747 int version
= *(compat_uint_t
*) raw_data
;
750 struct compat_nfs4_mount_data_v1
*raw
= raw_data
;
751 struct nfs4_mount_data
*real
= raw_data
;
753 /* copy the fields backwards */
754 real
->auth_flavours
= compat_ptr(raw
->auth_flavours
);
755 real
->auth_flavourlen
= raw
->auth_flavourlen
;
756 real
->proto
= raw
->proto
;
757 real
->host_addr
= compat_ptr(raw
->host_addr
);
758 real
->host_addrlen
= raw
->host_addrlen
;
759 compat_nfs_string(&real
->hostname
, &raw
->hostname
);
760 compat_nfs_string(&real
->mnt_path
, &raw
->mnt_path
);
761 compat_nfs_string(&real
->client_addr
, &raw
->client_addr
);
762 real
->acdirmax
= raw
->acdirmax
;
763 real
->acdirmin
= raw
->acdirmin
;
764 real
->acregmax
= raw
->acregmax
;
765 real
->acregmin
= raw
->acregmin
;
766 real
->retrans
= raw
->retrans
;
767 real
->timeo
= raw
->timeo
;
768 real
->wsize
= raw
->wsize
;
769 real
->rsize
= raw
->rsize
;
770 real
->flags
= raw
->flags
;
771 real
->version
= raw
->version
;
777 #define SMBFS_NAME "smbfs"
778 #define NCPFS_NAME "ncpfs"
779 #define NFS4_NAME "nfs4"
781 asmlinkage
long compat_sys_mount(char __user
* dev_name
, char __user
* dir_name
,
782 char __user
* type
, unsigned long flags
,
785 unsigned long type_page
;
786 unsigned long data_page
;
787 unsigned long dev_page
;
791 retval
= copy_mount_options (type
, &type_page
);
795 dir_page
= getname(dir_name
);
796 retval
= PTR_ERR(dir_page
);
797 if (IS_ERR(dir_page
))
800 retval
= copy_mount_options (dev_name
, &dev_page
);
804 retval
= copy_mount_options (data
, &data_page
);
810 if (type_page
&& data_page
) {
811 if (!strcmp((char *)type_page
, SMBFS_NAME
)) {
812 do_smb_super_data_conv((void *)data_page
);
813 } else if (!strcmp((char *)type_page
, NCPFS_NAME
)) {
814 do_ncp_super_data_conv((void *)data_page
);
815 } else if (!strcmp((char *)type_page
, NFS4_NAME
)) {
816 if (do_nfs4_super_data_conv((void *) data_page
))
822 retval
= do_mount((char*)dev_page
, dir_page
, (char*)type_page
,
823 flags
, (void*)data_page
);
827 free_page(data_page
);
833 free_page(type_page
);
838 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
840 struct compat_old_linux_dirent
{
841 compat_ulong_t d_ino
;
842 compat_ulong_t d_offset
;
843 unsigned short d_namlen
;
847 struct compat_readdir_callback
{
848 struct compat_old_linux_dirent __user
*dirent
;
852 static int compat_fillonedir(void *__buf
, const char *name
, int namlen
,
853 loff_t offset
, u64 ino
, unsigned int d_type
)
855 struct compat_readdir_callback
*buf
= __buf
;
856 struct compat_old_linux_dirent __user
*dirent
;
857 compat_ulong_t d_ino
;
862 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
863 buf
->result
= -EOVERFLOW
;
867 dirent
= buf
->dirent
;
868 if (!access_ok(VERIFY_WRITE
, dirent
,
869 (unsigned long)(dirent
->d_name
+ namlen
+ 1) -
870 (unsigned long)dirent
))
872 if ( __put_user(d_ino
, &dirent
->d_ino
) ||
873 __put_user(offset
, &dirent
->d_offset
) ||
874 __put_user(namlen
, &dirent
->d_namlen
) ||
875 __copy_to_user(dirent
->d_name
, name
, namlen
) ||
876 __put_user(0, dirent
->d_name
+ namlen
))
880 buf
->result
= -EFAULT
;
884 asmlinkage
long compat_sys_old_readdir(unsigned int fd
,
885 struct compat_old_linux_dirent __user
*dirent
, unsigned int count
)
889 struct compat_readdir_callback buf
;
899 error
= vfs_readdir(file
, compat_fillonedir
, &buf
);
908 struct compat_linux_dirent
{
909 compat_ulong_t d_ino
;
910 compat_ulong_t d_off
;
911 unsigned short d_reclen
;
915 struct compat_getdents_callback
{
916 struct compat_linux_dirent __user
*current_dir
;
917 struct compat_linux_dirent __user
*previous
;
922 static int compat_filldir(void *__buf
, const char *name
, int namlen
,
923 loff_t offset
, u64 ino
, unsigned int d_type
)
925 struct compat_linux_dirent __user
* dirent
;
926 struct compat_getdents_callback
*buf
= __buf
;
927 compat_ulong_t d_ino
;
928 int reclen
= ALIGN(NAME_OFFSET(dirent
) + namlen
+ 2, sizeof(compat_long_t
));
930 buf
->error
= -EINVAL
; /* only used if we fail.. */
931 if (reclen
> buf
->count
)
934 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
935 buf
->error
= -EOVERFLOW
;
938 dirent
= buf
->previous
;
940 if (__put_user(offset
, &dirent
->d_off
))
943 dirent
= buf
->current_dir
;
944 if (__put_user(d_ino
, &dirent
->d_ino
))
946 if (__put_user(reclen
, &dirent
->d_reclen
))
948 if (copy_to_user(dirent
->d_name
, name
, namlen
))
950 if (__put_user(0, dirent
->d_name
+ namlen
))
952 if (__put_user(d_type
, (char __user
*) dirent
+ reclen
- 1))
954 buf
->previous
= dirent
;
955 dirent
= (void __user
*)dirent
+ reclen
;
956 buf
->current_dir
= dirent
;
957 buf
->count
-= reclen
;
960 buf
->error
= -EFAULT
;
964 asmlinkage
long compat_sys_getdents(unsigned int fd
,
965 struct compat_linux_dirent __user
*dirent
, unsigned int count
)
968 struct compat_linux_dirent __user
* lastdirent
;
969 struct compat_getdents_callback buf
;
973 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
981 buf
.current_dir
= dirent
;
986 error
= vfs_readdir(file
, compat_filldir
, &buf
);
989 lastdirent
= buf
.previous
;
991 if (put_user(file
->f_pos
, &lastdirent
->d_off
))
994 error
= count
- buf
.count
;
1001 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1003 struct compat_getdents_callback64
{
1004 struct linux_dirent64 __user
*current_dir
;
1005 struct linux_dirent64 __user
*previous
;
1010 static int compat_filldir64(void * __buf
, const char * name
, int namlen
, loff_t offset
,
1011 u64 ino
, unsigned int d_type
)
1013 struct linux_dirent64 __user
*dirent
;
1014 struct compat_getdents_callback64
*buf
= __buf
;
1015 int jj
= NAME_OFFSET(dirent
);
1016 int reclen
= ALIGN(jj
+ namlen
+ 1, sizeof(u64
));
1019 buf
->error
= -EINVAL
; /* only used if we fail.. */
1020 if (reclen
> buf
->count
)
1022 dirent
= buf
->previous
;
1025 if (__put_user_unaligned(offset
, &dirent
->d_off
))
1028 dirent
= buf
->current_dir
;
1029 if (__put_user_unaligned(ino
, &dirent
->d_ino
))
1032 if (__put_user_unaligned(off
, &dirent
->d_off
))
1034 if (__put_user(reclen
, &dirent
->d_reclen
))
1036 if (__put_user(d_type
, &dirent
->d_type
))
1038 if (copy_to_user(dirent
->d_name
, name
, namlen
))
1040 if (__put_user(0, dirent
->d_name
+ namlen
))
1042 buf
->previous
= dirent
;
1043 dirent
= (void __user
*)dirent
+ reclen
;
1044 buf
->current_dir
= dirent
;
1045 buf
->count
-= reclen
;
1048 buf
->error
= -EFAULT
;
1052 asmlinkage
long compat_sys_getdents64(unsigned int fd
,
1053 struct linux_dirent64 __user
* dirent
, unsigned int count
)
1056 struct linux_dirent64 __user
* lastdirent
;
1057 struct compat_getdents_callback64 buf
;
1061 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
1069 buf
.current_dir
= dirent
;
1070 buf
.previous
= NULL
;
1074 error
= vfs_readdir(file
, compat_filldir64
, &buf
);
1077 lastdirent
= buf
.previous
;
1079 typeof(lastdirent
->d_off
) d_off
= file
->f_pos
;
1080 if (__put_user_unaligned(d_off
, &lastdirent
->d_off
))
1083 error
= count
- buf
.count
;
1089 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1091 static ssize_t
compat_do_readv_writev(int type
, struct file
*file
,
1092 const struct compat_iovec __user
*uvector
,
1093 unsigned long nr_segs
, loff_t
*pos
)
1095 compat_ssize_t tot_len
;
1096 struct iovec iovstack
[UIO_FASTIOV
];
1097 struct iovec
*iov
=iovstack
, *vector
;
1104 * SuS says "The readv() function *may* fail if the iovcnt argument
1105 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1106 * traditionally returned zero for zero segments, so...
1113 * First get the "struct iovec" from user memory and
1114 * verify all the pointers
1117 if ((nr_segs
> UIO_MAXIOV
) || (nr_segs
<= 0))
1121 if (nr_segs
> UIO_FASTIOV
) {
1123 iov
= kmalloc(nr_segs
*sizeof(struct iovec
), GFP_KERNEL
);
1128 if (!access_ok(VERIFY_READ
, uvector
, nr_segs
*sizeof(*uvector
)))
1132 * Single unix specification:
1133 * We should -EINVAL if an element length is not >= 0 and fitting an
1134 * ssize_t. The total length is fitting an ssize_t
1136 * Be careful here because iov_len is a size_t not an ssize_t
1141 for (seg
= 0 ; seg
< nr_segs
; seg
++) {
1142 compat_ssize_t tmp
= tot_len
;
1146 if (__get_user(len
, &uvector
->iov_len
) ||
1147 __get_user(buf
, &uvector
->iov_base
)) {
1151 if (len
< 0) /* size_t not fitting an compat_ssize_t .. */
1154 if (tot_len
< tmp
) /* maths overflow on the compat_ssize_t */
1156 vector
->iov_base
= compat_ptr(buf
);
1157 vector
->iov_len
= (compat_size_t
) len
;
1166 ret
= rw_verify_area(type
, file
, pos
, tot_len
);
1172 fn
= file
->f_op
->read
;
1173 fnv
= file
->f_op
->aio_read
;
1175 fn
= (io_fn_t
)file
->f_op
->write
;
1176 fnv
= file
->f_op
->aio_write
;
1180 ret
= do_sync_readv_writev(file
, iov
, nr_segs
, tot_len
,
1183 ret
= do_loop_readv_writev(file
, iov
, nr_segs
, pos
, fn
);
1186 if (iov
!= iovstack
)
1188 if ((ret
+ (type
== READ
)) > 0) {
1189 struct dentry
*dentry
= file
->f_path
.dentry
;
1191 fsnotify_access(dentry
);
1193 fsnotify_modify(dentry
);
1198 static size_t compat_readv(struct file
*file
,
1199 const struct compat_iovec __user
*vec
,
1200 unsigned long vlen
, loff_t
*pos
)
1202 ssize_t ret
= -EBADF
;
1204 if (!(file
->f_mode
& FMODE_READ
))
1208 if (!file
->f_op
|| (!file
->f_op
->aio_read
&& !file
->f_op
->read
))
1211 ret
= compat_do_readv_writev(READ
, file
, vec
, vlen
, pos
);
1215 add_rchar(current
, ret
);
1221 compat_sys_readv(unsigned long fd
, const struct compat_iovec __user
*vec
,
1230 ret
= compat_readv(file
, vec
, vlen
, &file
->f_pos
);
1236 compat_sys_preadv(unsigned long fd
, const struct compat_iovec __user
*vec
,
1237 unsigned long vlen
, u32 pos_high
, u32 pos_low
)
1239 loff_t pos
= ((loff_t
)pos_high
<< 32) | pos_low
;
1248 ret
= compat_readv(file
, vec
, vlen
, &pos
);
1253 static size_t compat_writev(struct file
*file
,
1254 const struct compat_iovec __user
*vec
,
1255 unsigned long vlen
, loff_t
*pos
)
1257 ssize_t ret
= -EBADF
;
1259 if (!(file
->f_mode
& FMODE_WRITE
))
1263 if (!file
->f_op
|| (!file
->f_op
->aio_write
&& !file
->f_op
->write
))
1266 ret
= compat_do_readv_writev(WRITE
, file
, vec
, vlen
, pos
);
1270 add_wchar(current
, ret
);
1276 compat_sys_writev(unsigned long fd
, const struct compat_iovec __user
*vec
,
1285 ret
= compat_writev(file
, vec
, vlen
, &file
->f_pos
);
1291 compat_sys_pwritev(unsigned long fd
, const struct compat_iovec __user
*vec
,
1292 unsigned long vlen
, u32 pos_high
, u32 pos_low
)
1294 loff_t pos
= ((loff_t
)pos_high
<< 32) | pos_low
;
1303 ret
= compat_writev(file
, vec
, vlen
, &pos
);
1309 compat_sys_vmsplice(int fd
, const struct compat_iovec __user
*iov32
,
1310 unsigned int nr_segs
, unsigned int flags
)
1313 struct iovec __user
*iov
;
1314 if (nr_segs
> UIO_MAXIOV
)
1316 iov
= compat_alloc_user_space(nr_segs
* sizeof(struct iovec
));
1317 for (i
= 0; i
< nr_segs
; i
++) {
1318 struct compat_iovec v
;
1319 if (get_user(v
.iov_base
, &iov32
[i
].iov_base
) ||
1320 get_user(v
.iov_len
, &iov32
[i
].iov_len
) ||
1321 put_user(compat_ptr(v
.iov_base
), &iov
[i
].iov_base
) ||
1322 put_user(v
.iov_len
, &iov
[i
].iov_len
))
1325 return sys_vmsplice(fd
, iov
, nr_segs
, flags
);
1329 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1333 compat_sys_open(const char __user
*filename
, int flags
, int mode
)
1335 return do_sys_open(AT_FDCWD
, filename
, flags
, mode
);
1339 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1343 compat_sys_openat(unsigned int dfd
, const char __user
*filename
, int flags
, int mode
)
1345 return do_sys_open(dfd
, filename
, flags
, mode
);
1349 * compat_count() counts the number of arguments/envelopes. It is basically
1350 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1351 * and envp pointers.
1353 static int compat_count(compat_uptr_t __user
*argv
, int max
)
1361 if (get_user(p
, argv
))
1374 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1375 * except that it works with 32 bit argv and envp pointers.
1377 static int compat_copy_strings(int argc
, compat_uptr_t __user
*argv
,
1378 struct linux_binprm
*bprm
)
1380 struct page
*kmapped_page
= NULL
;
1382 unsigned long kpos
= 0;
1385 while (argc
-- > 0) {
1390 if (get_user(str
, argv
+argc
) ||
1391 !(len
= strnlen_user(compat_ptr(str
), MAX_ARG_STRLEN
))) {
1396 if (len
> MAX_ARG_STRLEN
) {
1401 /* We're going to work our way backwords. */
1407 int offset
, bytes_to_copy
;
1409 offset
= pos
% PAGE_SIZE
;
1413 bytes_to_copy
= offset
;
1414 if (bytes_to_copy
> len
)
1415 bytes_to_copy
= len
;
1417 offset
-= bytes_to_copy
;
1418 pos
-= bytes_to_copy
;
1419 str
-= bytes_to_copy
;
1420 len
-= bytes_to_copy
;
1422 if (!kmapped_page
|| kpos
!= (pos
& PAGE_MASK
)) {
1425 #ifdef CONFIG_STACK_GROWSUP
1426 ret
= expand_stack_downwards(bprm
->vma
, pos
);
1428 /* We've exceed the stack rlimit. */
1433 ret
= get_user_pages(current
, bprm
->mm
, pos
,
1434 1, 1, 1, &page
, NULL
);
1436 /* We've exceed the stack rlimit. */
1442 flush_kernel_dcache_page(kmapped_page
);
1443 kunmap(kmapped_page
);
1444 put_page(kmapped_page
);
1446 kmapped_page
= page
;
1447 kaddr
= kmap(kmapped_page
);
1448 kpos
= pos
& PAGE_MASK
;
1449 flush_cache_page(bprm
->vma
, kpos
,
1450 page_to_pfn(kmapped_page
));
1452 if (copy_from_user(kaddr
+offset
, compat_ptr(str
),
1462 flush_kernel_dcache_page(kmapped_page
);
1463 kunmap(kmapped_page
);
1464 put_page(kmapped_page
);
1470 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1471 * that it processes 32 bit argv and envp pointers.
1473 int compat_do_execve(char * filename
,
1474 compat_uptr_t __user
*argv
,
1475 compat_uptr_t __user
*envp
,
1476 struct pt_regs
* regs
)
1478 struct linux_binprm
*bprm
;
1480 struct files_struct
*displaced
;
1483 retval
= unshare_files(&displaced
);
1488 bprm
= kzalloc(sizeof(*bprm
), GFP_KERNEL
);
1492 retval
= mutex_lock_interruptible(¤t
->cred_exec_mutex
);
1495 current
->in_execve
= 1;
1498 bprm
->cred
= prepare_exec_creds();
1501 check_unsafe_exec(bprm
);
1503 file
= open_exec(filename
);
1504 retval
= PTR_ERR(file
);
1511 bprm
->filename
= filename
;
1512 bprm
->interp
= filename
;
1514 retval
= bprm_mm_init(bprm
);
1518 bprm
->argc
= compat_count(argv
, MAX_ARG_STRINGS
);
1519 if ((retval
= bprm
->argc
) < 0)
1522 bprm
->envc
= compat_count(envp
, MAX_ARG_STRINGS
);
1523 if ((retval
= bprm
->envc
) < 0)
1526 retval
= prepare_binprm(bprm
);
1530 retval
= copy_strings_kernel(1, &bprm
->filename
, bprm
);
1534 bprm
->exec
= bprm
->p
;
1535 retval
= compat_copy_strings(bprm
->envc
, envp
, bprm
);
1539 retval
= compat_copy_strings(bprm
->argc
, argv
, bprm
);
1543 retval
= search_binary_handler(bprm
, regs
);
1547 /* execve succeeded */
1548 current
->in_execve
= 0;
1549 mutex_unlock(¤t
->cred_exec_mutex
);
1550 acct_update_integrals(current
);
1553 put_files_struct(displaced
);
1562 allow_write_access(bprm
->file
);
1567 current
->in_execve
= 0;
1568 mutex_unlock(¤t
->cred_exec_mutex
);
1575 reset_files_struct(displaced
);
1580 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1582 static int poll_select_copy_remaining(struct timespec
*end_time
, void __user
*p
,
1583 int timeval
, int ret
)
1590 if (current
->personality
& STICKY_TIMEOUTS
)
1593 /* No update for zero timeout */
1594 if (!end_time
->tv_sec
&& !end_time
->tv_nsec
)
1598 ts
= timespec_sub(*end_time
, ts
);
1600 ts
.tv_sec
= ts
.tv_nsec
= 0;
1603 struct compat_timeval rtv
;
1605 rtv
.tv_sec
= ts
.tv_sec
;
1606 rtv
.tv_usec
= ts
.tv_nsec
/ NSEC_PER_USEC
;
1608 if (!copy_to_user(p
, &rtv
, sizeof(rtv
)))
1611 struct compat_timespec rts
;
1613 rts
.tv_sec
= ts
.tv_sec
;
1614 rts
.tv_nsec
= ts
.tv_nsec
;
1616 if (!copy_to_user(p
, &rts
, sizeof(rts
)))
1620 * If an application puts its timeval in read-only memory, we
1621 * don't want the Linux-specific update to the timeval to
1622 * cause a fault after the select has completed
1623 * successfully. However, because we're not updating the
1624 * timeval, we can't restart the system call.
1628 if (ret
== -ERESTARTNOHAND
)
1634 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1635 * 64-bit unsigned longs.
1638 int compat_get_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1639 unsigned long *fdset
)
1641 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1645 if (!access_ok(VERIFY_WRITE
, ufdset
, nr
*sizeof(compat_ulong_t
)))
1652 if (__get_user(l
, ufdset
) || __get_user(h
, ufdset
+1))
1655 *fdset
++ = h
<< 32 | l
;
1658 if (odd
&& __get_user(*fdset
, ufdset
))
1661 /* Tricky, must clear full unsigned long in the
1662 * kernel fdset at the end, this makes sure that
1665 memset(fdset
, 0, ((nr
+ 1) & ~1)*sizeof(compat_ulong_t
));
1671 int compat_set_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1672 unsigned long *fdset
)
1675 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1686 if (__put_user(l
, ufdset
) || __put_user(h
, ufdset
+1))
1691 if (odd
&& __put_user(*fdset
, ufdset
))
1698 * This is a virtual copy of sys_select from fs/select.c and probably
1699 * should be compared to it from time to time
1703 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1704 * like to be certain this leads to no problems. So I return
1705 * EINTR just for safety.
1707 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1708 * I'm trying ERESTARTNOHAND which restart only when you want to.
1710 #define MAX_SELECT_SECONDS \
1711 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1713 int compat_core_sys_select(int n
, compat_ulong_t __user
*inp
,
1714 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1715 struct timespec
*end_time
)
1719 int size
, max_fds
, ret
= -EINVAL
;
1720 struct fdtable
*fdt
;
1721 long stack_fds
[SELECT_STACK_ALLOC
/sizeof(long)];
1726 /* max_fds can increase, so grab it once to avoid race */
1728 fdt
= files_fdtable(current
->files
);
1729 max_fds
= fdt
->max_fds
;
1735 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1736 * since we used fdset we need to allocate memory in units of
1739 size
= FDS_BYTES(n
);
1741 if (size
> sizeof(stack_fds
) / 6) {
1742 bits
= kmalloc(6 * size
, GFP_KERNEL
);
1747 fds
.in
= (unsigned long *) bits
;
1748 fds
.out
= (unsigned long *) (bits
+ size
);
1749 fds
.ex
= (unsigned long *) (bits
+ 2*size
);
1750 fds
.res_in
= (unsigned long *) (bits
+ 3*size
);
1751 fds
.res_out
= (unsigned long *) (bits
+ 4*size
);
1752 fds
.res_ex
= (unsigned long *) (bits
+ 5*size
);
1754 if ((ret
= compat_get_fd_set(n
, inp
, fds
.in
)) ||
1755 (ret
= compat_get_fd_set(n
, outp
, fds
.out
)) ||
1756 (ret
= compat_get_fd_set(n
, exp
, fds
.ex
)))
1758 zero_fd_set(n
, fds
.res_in
);
1759 zero_fd_set(n
, fds
.res_out
);
1760 zero_fd_set(n
, fds
.res_ex
);
1762 ret
= do_select(n
, &fds
, end_time
);
1767 ret
= -ERESTARTNOHAND
;
1768 if (signal_pending(current
))
1773 if (compat_set_fd_set(n
, inp
, fds
.res_in
) ||
1774 compat_set_fd_set(n
, outp
, fds
.res_out
) ||
1775 compat_set_fd_set(n
, exp
, fds
.res_ex
))
1778 if (bits
!= stack_fds
)
1784 asmlinkage
long compat_sys_select(int n
, compat_ulong_t __user
*inp
,
1785 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1786 struct compat_timeval __user
*tvp
)
1788 struct timespec end_time
, *to
= NULL
;
1789 struct compat_timeval tv
;
1793 if (copy_from_user(&tv
, tvp
, sizeof(tv
)))
1797 if (poll_select_set_timeout(to
,
1798 tv
.tv_sec
+ (tv
.tv_usec
/ USEC_PER_SEC
),
1799 (tv
.tv_usec
% USEC_PER_SEC
) * NSEC_PER_USEC
))
1803 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1804 ret
= poll_select_copy_remaining(&end_time
, tvp
, 1, ret
);
1809 #ifdef HAVE_SET_RESTORE_SIGMASK
1810 static long do_compat_pselect(int n
, compat_ulong_t __user
*inp
,
1811 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1812 struct compat_timespec __user
*tsp
, compat_sigset_t __user
*sigmask
,
1813 compat_size_t sigsetsize
)
1815 compat_sigset_t ss32
;
1816 sigset_t ksigmask
, sigsaved
;
1817 struct compat_timespec ts
;
1818 struct timespec end_time
, *to
= NULL
;
1822 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1826 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1831 if (sigsetsize
!= sizeof(compat_sigset_t
))
1833 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1835 sigset_from_compat(&ksigmask
, &ss32
);
1837 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1838 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1841 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1842 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1844 if (ret
== -ERESTARTNOHAND
) {
1846 * Don't restore the signal mask yet. Let do_signal() deliver
1847 * the signal on the way back to userspace, before the signal
1851 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1853 set_restore_sigmask();
1856 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1861 asmlinkage
long compat_sys_pselect6(int n
, compat_ulong_t __user
*inp
,
1862 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1863 struct compat_timespec __user
*tsp
, void __user
*sig
)
1865 compat_size_t sigsetsize
= 0;
1866 compat_uptr_t up
= 0;
1869 if (!access_ok(VERIFY_READ
, sig
,
1870 sizeof(compat_uptr_t
)+sizeof(compat_size_t
)) ||
1871 __get_user(up
, (compat_uptr_t __user
*)sig
) ||
1872 __get_user(sigsetsize
,
1873 (compat_size_t __user
*)(sig
+sizeof(up
))))
1876 return do_compat_pselect(n
, inp
, outp
, exp
, tsp
, compat_ptr(up
),
1880 asmlinkage
long compat_sys_ppoll(struct pollfd __user
*ufds
,
1881 unsigned int nfds
, struct compat_timespec __user
*tsp
,
1882 const compat_sigset_t __user
*sigmask
, compat_size_t sigsetsize
)
1884 compat_sigset_t ss32
;
1885 sigset_t ksigmask
, sigsaved
;
1886 struct compat_timespec ts
;
1887 struct timespec end_time
, *to
= NULL
;
1891 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1895 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1900 if (sigsetsize
!= sizeof(compat_sigset_t
))
1902 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1904 sigset_from_compat(&ksigmask
, &ss32
);
1906 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1907 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1910 ret
= do_sys_poll(ufds
, nfds
, to
);
1912 /* We can restart this syscall, usually */
1913 if (ret
== -EINTR
) {
1915 * Don't restore the signal mask yet. Let do_signal() deliver
1916 * the signal on the way back to userspace, before the signal
1920 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1922 set_restore_sigmask();
1924 ret
= -ERESTARTNOHAND
;
1926 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1928 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1932 #endif /* HAVE_SET_RESTORE_SIGMASK */
1934 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1935 /* Stuff for NFS server syscalls... */
1936 struct compat_nfsctl_svc
{
1941 struct compat_nfsctl_client
{
1942 s8 cl32_ident
[NFSCLNT_IDMAX
+1];
1944 struct in_addr cl32_addrlist
[NFSCLNT_ADDRMAX
];
1947 u8 cl32_fhkey
[NFSCLNT_KEYMAX
];
1950 struct compat_nfsctl_export
{
1951 char ex32_client
[NFSCLNT_IDMAX
+1];
1952 char ex32_path
[NFS_MAXPATHLEN
+1];
1953 compat_dev_t ex32_dev
;
1954 compat_ino_t ex32_ino
;
1955 compat_int_t ex32_flags
;
1956 __compat_uid_t ex32_anon_uid
;
1957 __compat_gid_t ex32_anon_gid
;
1960 struct compat_nfsctl_fdparm
{
1961 struct sockaddr gd32_addr
;
1962 s8 gd32_path
[NFS_MAXPATHLEN
+1];
1963 compat_int_t gd32_version
;
1966 struct compat_nfsctl_fsparm
{
1967 struct sockaddr gd32_addr
;
1968 s8 gd32_path
[NFS_MAXPATHLEN
+1];
1969 compat_int_t gd32_maxlen
;
1972 struct compat_nfsctl_arg
{
1973 compat_int_t ca32_version
; /* safeguard */
1975 struct compat_nfsctl_svc u32_svc
;
1976 struct compat_nfsctl_client u32_client
;
1977 struct compat_nfsctl_export u32_export
;
1978 struct compat_nfsctl_fdparm u32_getfd
;
1979 struct compat_nfsctl_fsparm u32_getfs
;
1981 #define ca32_svc u.u32_svc
1982 #define ca32_client u.u32_client
1983 #define ca32_export u.u32_export
1984 #define ca32_getfd u.u32_getfd
1985 #define ca32_getfs u.u32_getfs
1988 union compat_nfsctl_res
{
1989 __u8 cr32_getfh
[NFS_FHSIZE
];
1990 struct knfsd_fh cr32_getfs
;
1993 static int compat_nfs_svc_trans(struct nfsctl_arg
*karg
,
1994 struct compat_nfsctl_arg __user
*arg
)
1996 if (!access_ok(VERIFY_READ
, &arg
->ca32_svc
, sizeof(arg
->ca32_svc
)) ||
1997 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
1998 __get_user(karg
->ca_svc
.svc_port
, &arg
->ca32_svc
.svc32_port
) ||
1999 __get_user(karg
->ca_svc
.svc_nthreads
,
2000 &arg
->ca32_svc
.svc32_nthreads
))
2005 static int compat_nfs_clnt_trans(struct nfsctl_arg
*karg
,
2006 struct compat_nfsctl_arg __user
*arg
)
2008 if (!access_ok(VERIFY_READ
, &arg
->ca32_client
,
2009 sizeof(arg
->ca32_client
)) ||
2010 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2011 __copy_from_user(&karg
->ca_client
.cl_ident
[0],
2012 &arg
->ca32_client
.cl32_ident
[0],
2014 __get_user(karg
->ca_client
.cl_naddr
,
2015 &arg
->ca32_client
.cl32_naddr
) ||
2016 __copy_from_user(&karg
->ca_client
.cl_addrlist
[0],
2017 &arg
->ca32_client
.cl32_addrlist
[0],
2018 (sizeof(struct in_addr
) * NFSCLNT_ADDRMAX
)) ||
2019 __get_user(karg
->ca_client
.cl_fhkeytype
,
2020 &arg
->ca32_client
.cl32_fhkeytype
) ||
2021 __get_user(karg
->ca_client
.cl_fhkeylen
,
2022 &arg
->ca32_client
.cl32_fhkeylen
) ||
2023 __copy_from_user(&karg
->ca_client
.cl_fhkey
[0],
2024 &arg
->ca32_client
.cl32_fhkey
[0],
2031 static int compat_nfs_exp_trans(struct nfsctl_arg
*karg
,
2032 struct compat_nfsctl_arg __user
*arg
)
2034 if (!access_ok(VERIFY_READ
, &arg
->ca32_export
,
2035 sizeof(arg
->ca32_export
)) ||
2036 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2037 __copy_from_user(&karg
->ca_export
.ex_client
[0],
2038 &arg
->ca32_export
.ex32_client
[0],
2040 __copy_from_user(&karg
->ca_export
.ex_path
[0],
2041 &arg
->ca32_export
.ex32_path
[0],
2043 __get_user(karg
->ca_export
.ex_dev
,
2044 &arg
->ca32_export
.ex32_dev
) ||
2045 __get_user(karg
->ca_export
.ex_ino
,
2046 &arg
->ca32_export
.ex32_ino
) ||
2047 __get_user(karg
->ca_export
.ex_flags
,
2048 &arg
->ca32_export
.ex32_flags
) ||
2049 __get_user(karg
->ca_export
.ex_anon_uid
,
2050 &arg
->ca32_export
.ex32_anon_uid
) ||
2051 __get_user(karg
->ca_export
.ex_anon_gid
,
2052 &arg
->ca32_export
.ex32_anon_gid
))
2054 SET_UID(karg
->ca_export
.ex_anon_uid
, karg
->ca_export
.ex_anon_uid
);
2055 SET_GID(karg
->ca_export
.ex_anon_gid
, karg
->ca_export
.ex_anon_gid
);
2060 static int compat_nfs_getfd_trans(struct nfsctl_arg
*karg
,
2061 struct compat_nfsctl_arg __user
*arg
)
2063 if (!access_ok(VERIFY_READ
, &arg
->ca32_getfd
,
2064 sizeof(arg
->ca32_getfd
)) ||
2065 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2066 __copy_from_user(&karg
->ca_getfd
.gd_addr
,
2067 &arg
->ca32_getfd
.gd32_addr
,
2068 (sizeof(struct sockaddr
))) ||
2069 __copy_from_user(&karg
->ca_getfd
.gd_path
,
2070 &arg
->ca32_getfd
.gd32_path
,
2071 (NFS_MAXPATHLEN
+1)) ||
2072 __get_user(karg
->ca_getfd
.gd_version
,
2073 &arg
->ca32_getfd
.gd32_version
))
2079 static int compat_nfs_getfs_trans(struct nfsctl_arg
*karg
,
2080 struct compat_nfsctl_arg __user
*arg
)
2082 if (!access_ok(VERIFY_READ
,&arg
->ca32_getfs
,sizeof(arg
->ca32_getfs
)) ||
2083 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2084 __copy_from_user(&karg
->ca_getfs
.gd_addr
,
2085 &arg
->ca32_getfs
.gd32_addr
,
2086 (sizeof(struct sockaddr
))) ||
2087 __copy_from_user(&karg
->ca_getfs
.gd_path
,
2088 &arg
->ca32_getfs
.gd32_path
,
2089 (NFS_MAXPATHLEN
+1)) ||
2090 __get_user(karg
->ca_getfs
.gd_maxlen
,
2091 &arg
->ca32_getfs
.gd32_maxlen
))
2097 /* This really doesn't need translations, we are only passing
2098 * back a union which contains opaque nfs file handle data.
2100 static int compat_nfs_getfh_res_trans(union nfsctl_res
*kres
,
2101 union compat_nfsctl_res __user
*res
)
2105 err
= copy_to_user(res
, kres
, sizeof(*res
));
2107 return (err
) ? -EFAULT
: 0;
2110 asmlinkage
long compat_sys_nfsservctl(int cmd
,
2111 struct compat_nfsctl_arg __user
*arg
,
2112 union compat_nfsctl_res __user
*res
)
2114 struct nfsctl_arg
*karg
;
2115 union nfsctl_res
*kres
;
2119 karg
= kmalloc(sizeof(*karg
), GFP_USER
);
2120 kres
= kmalloc(sizeof(*kres
), GFP_USER
);
2121 if(!karg
|| !kres
) {
2128 err
= compat_nfs_svc_trans(karg
, arg
);
2131 case NFSCTL_ADDCLIENT
:
2132 err
= compat_nfs_clnt_trans(karg
, arg
);
2135 case NFSCTL_DELCLIENT
:
2136 err
= compat_nfs_clnt_trans(karg
, arg
);
2140 case NFSCTL_UNEXPORT
:
2141 err
= compat_nfs_exp_trans(karg
, arg
);
2145 err
= compat_nfs_getfd_trans(karg
, arg
);
2149 err
= compat_nfs_getfs_trans(karg
, arg
);
2162 /* The __user pointer casts are valid because of the set_fs() */
2163 err
= sys_nfsservctl(cmd
, (void __user
*) karg
, (void __user
*) kres
);
2169 if((cmd
== NFSCTL_GETFD
) ||
2170 (cmd
== NFSCTL_GETFS
))
2171 err
= compat_nfs_getfh_res_trans(kres
, res
);
2179 long asmlinkage
compat_sys_nfsservctl(int cmd
, void *notused
, void *notused2
)
2181 return sys_ni_syscall();
2187 #ifdef HAVE_SET_RESTORE_SIGMASK
2188 asmlinkage
long compat_sys_epoll_pwait(int epfd
,
2189 struct compat_epoll_event __user
*events
,
2190 int maxevents
, int timeout
,
2191 const compat_sigset_t __user
*sigmask
,
2192 compat_size_t sigsetsize
)
2195 compat_sigset_t csigmask
;
2196 sigset_t ksigmask
, sigsaved
;
2199 * If the caller wants a certain signal mask to be set during the wait,
2203 if (sigsetsize
!= sizeof(compat_sigset_t
))
2205 if (copy_from_user(&csigmask
, sigmask
, sizeof(csigmask
)))
2207 sigset_from_compat(&ksigmask
, &csigmask
);
2208 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
) | sigmask(SIGSTOP
));
2209 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
2212 err
= sys_epoll_wait(epfd
, events
, maxevents
, timeout
);
2215 * If we changed the signal mask, we need to restore the original one.
2216 * In case we've got a signal while waiting, we do not restore the
2217 * signal mask yet, and we allow do_signal() to deliver the signal on
2218 * the way back to userspace, before the signal mask is restored.
2221 if (err
== -EINTR
) {
2222 memcpy(¤t
->saved_sigmask
, &sigsaved
,
2224 set_restore_sigmask();
2226 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
2231 #endif /* HAVE_SET_RESTORE_SIGMASK */
2233 #endif /* CONFIG_EPOLL */
2235 #ifdef CONFIG_SIGNALFD
2237 asmlinkage
long compat_sys_signalfd4(int ufd
,
2238 const compat_sigset_t __user
*sigmask
,
2239 compat_size_t sigsetsize
, int flags
)
2241 compat_sigset_t ss32
;
2243 sigset_t __user
*ksigmask
;
2245 if (sigsetsize
!= sizeof(compat_sigset_t
))
2247 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
2249 sigset_from_compat(&tmp
, &ss32
);
2250 ksigmask
= compat_alloc_user_space(sizeof(sigset_t
));
2251 if (copy_to_user(ksigmask
, &tmp
, sizeof(sigset_t
)))
2254 return sys_signalfd4(ufd
, ksigmask
, sizeof(sigset_t
), flags
);
2257 asmlinkage
long compat_sys_signalfd(int ufd
,
2258 const compat_sigset_t __user
*sigmask
,
2259 compat_size_t sigsetsize
)
2261 return compat_sys_signalfd4(ufd
, sigmask
, sigsetsize
, 0);
2263 #endif /* CONFIG_SIGNALFD */
2265 #ifdef CONFIG_TIMERFD
2267 asmlinkage
long compat_sys_timerfd_settime(int ufd
, int flags
,
2268 const struct compat_itimerspec __user
*utmr
,
2269 struct compat_itimerspec __user
*otmr
)
2272 struct itimerspec t
;
2273 struct itimerspec __user
*ut
;
2275 if (get_compat_itimerspec(&t
, utmr
))
2277 ut
= compat_alloc_user_space(2 * sizeof(struct itimerspec
));
2278 if (copy_to_user(&ut
[0], &t
, sizeof(t
)))
2280 error
= sys_timerfd_settime(ufd
, flags
, &ut
[0], &ut
[1]);
2282 error
= (copy_from_user(&t
, &ut
[1], sizeof(struct itimerspec
)) ||
2283 put_compat_itimerspec(otmr
, &t
)) ? -EFAULT
: 0;
2288 asmlinkage
long compat_sys_timerfd_gettime(int ufd
,
2289 struct compat_itimerspec __user
*otmr
)
2292 struct itimerspec t
;
2293 struct itimerspec __user
*ut
;
2295 ut
= compat_alloc_user_space(sizeof(struct itimerspec
));
2296 error
= sys_timerfd_gettime(ufd
, ut
);
2298 error
= (copy_from_user(&t
, ut
, sizeof(struct itimerspec
)) ||
2299 put_compat_itimerspec(otmr
, &t
)) ? -EFAULT
: 0;
2304 #endif /* CONFIG_TIMERFD */