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>
54 #include <linux/fs_struct.h>
56 #include <asm/uaccess.h>
57 #include <asm/mmu_context.h>
58 #include <asm/ioctls.h>
63 int compat_printk(const char *fmt
, ...)
70 ret
= vprintk(fmt
, ap
);
75 #include "read_write.h"
78 * Not all architectures have sys_utime, so implement this in terms
81 asmlinkage
long compat_sys_utime(char __user
*filename
, struct compat_utimbuf __user
*t
)
83 struct timespec tv
[2];
86 if (get_user(tv
[0].tv_sec
, &t
->actime
) ||
87 get_user(tv
[1].tv_sec
, &t
->modtime
))
92 return do_utimes(AT_FDCWD
, filename
, t
? tv
: NULL
, 0);
95 asmlinkage
long compat_sys_utimensat(unsigned int dfd
, char __user
*filename
, struct compat_timespec __user
*t
, int flags
)
97 struct timespec tv
[2];
100 if (get_compat_timespec(&tv
[0], &t
[0]) ||
101 get_compat_timespec(&tv
[1], &t
[1]))
104 if ((tv
[0].tv_nsec
== UTIME_OMIT
|| tv
[0].tv_nsec
== UTIME_NOW
)
105 && tv
[0].tv_sec
!= 0)
107 if ((tv
[1].tv_nsec
== UTIME_OMIT
|| tv
[1].tv_nsec
== UTIME_NOW
)
108 && tv
[1].tv_sec
!= 0)
111 if (tv
[0].tv_nsec
== UTIME_OMIT
&& tv
[1].tv_nsec
== UTIME_OMIT
)
114 return do_utimes(dfd
, filename
, t
? tv
: NULL
, flags
);
117 asmlinkage
long compat_sys_futimesat(unsigned int dfd
, char __user
*filename
, struct compat_timeval __user
*t
)
119 struct timespec tv
[2];
122 if (get_user(tv
[0].tv_sec
, &t
[0].tv_sec
) ||
123 get_user(tv
[0].tv_nsec
, &t
[0].tv_usec
) ||
124 get_user(tv
[1].tv_sec
, &t
[1].tv_sec
) ||
125 get_user(tv
[1].tv_nsec
, &t
[1].tv_usec
))
127 if (tv
[0].tv_nsec
>= 1000000 || tv
[0].tv_nsec
< 0 ||
128 tv
[1].tv_nsec
>= 1000000 || tv
[1].tv_nsec
< 0)
130 tv
[0].tv_nsec
*= 1000;
131 tv
[1].tv_nsec
*= 1000;
133 return do_utimes(dfd
, filename
, t
? tv
: NULL
, 0);
136 asmlinkage
long compat_sys_utimes(char __user
*filename
, struct compat_timeval __user
*t
)
138 return compat_sys_futimesat(AT_FDCWD
, filename
, t
);
141 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
143 compat_ino_t ino
= stat
->ino
;
144 typeof(ubuf
->st_uid
) uid
= 0;
145 typeof(ubuf
->st_gid
) gid
= 0;
148 SET_UID(uid
, stat
->uid
);
149 SET_GID(gid
, stat
->gid
);
151 if ((u64
) stat
->size
> MAX_NON_LFS
||
152 !old_valid_dev(stat
->dev
) ||
153 !old_valid_dev(stat
->rdev
))
155 if (sizeof(ino
) < sizeof(stat
->ino
) && ino
!= stat
->ino
)
158 if (clear_user(ubuf
, sizeof(*ubuf
)))
161 err
= __put_user(old_encode_dev(stat
->dev
), &ubuf
->st_dev
);
162 err
|= __put_user(ino
, &ubuf
->st_ino
);
163 err
|= __put_user(stat
->mode
, &ubuf
->st_mode
);
164 err
|= __put_user(stat
->nlink
, &ubuf
->st_nlink
);
165 err
|= __put_user(uid
, &ubuf
->st_uid
);
166 err
|= __put_user(gid
, &ubuf
->st_gid
);
167 err
|= __put_user(old_encode_dev(stat
->rdev
), &ubuf
->st_rdev
);
168 err
|= __put_user(stat
->size
, &ubuf
->st_size
);
169 err
|= __put_user(stat
->atime
.tv_sec
, &ubuf
->st_atime
);
170 err
|= __put_user(stat
->atime
.tv_nsec
, &ubuf
->st_atime_nsec
);
171 err
|= __put_user(stat
->mtime
.tv_sec
, &ubuf
->st_mtime
);
172 err
|= __put_user(stat
->mtime
.tv_nsec
, &ubuf
->st_mtime_nsec
);
173 err
|= __put_user(stat
->ctime
.tv_sec
, &ubuf
->st_ctime
);
174 err
|= __put_user(stat
->ctime
.tv_nsec
, &ubuf
->st_ctime_nsec
);
175 err
|= __put_user(stat
->blksize
, &ubuf
->st_blksize
);
176 err
|= __put_user(stat
->blocks
, &ubuf
->st_blocks
);
180 asmlinkage
long compat_sys_newstat(char __user
* filename
,
181 struct compat_stat __user
*statbuf
)
184 int error
= vfs_stat_fd(AT_FDCWD
, filename
, &stat
);
187 error
= cp_compat_stat(&stat
, statbuf
);
191 asmlinkage
long compat_sys_newlstat(char __user
* filename
,
192 struct compat_stat __user
*statbuf
)
195 int error
= vfs_lstat_fd(AT_FDCWD
, filename
, &stat
);
198 error
= cp_compat_stat(&stat
, statbuf
);
202 #ifndef __ARCH_WANT_STAT64
203 asmlinkage
long compat_sys_newfstatat(unsigned int dfd
, char __user
*filename
,
204 struct compat_stat __user
*statbuf
, int flag
)
209 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
212 return cp_compat_stat(&stat
, statbuf
);
216 asmlinkage
long compat_sys_newfstat(unsigned int fd
,
217 struct compat_stat __user
* statbuf
)
220 int error
= vfs_fstat(fd
, &stat
);
223 error
= cp_compat_stat(&stat
, statbuf
);
227 static int put_compat_statfs(struct compat_statfs __user
*ubuf
, struct kstatfs
*kbuf
)
230 if (sizeof ubuf
->f_blocks
== 4) {
231 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
232 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
234 /* f_files and f_ffree may be -1; it's okay
235 * to stuff that into 32 bits */
236 if (kbuf
->f_files
!= 0xffffffffffffffffULL
237 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
239 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
240 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
243 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
244 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
245 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
246 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
247 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
248 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
249 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
250 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
251 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
252 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
253 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
254 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
) ||
255 __put_user(0, &ubuf
->f_spare
[0]) ||
256 __put_user(0, &ubuf
->f_spare
[1]) ||
257 __put_user(0, &ubuf
->f_spare
[2]) ||
258 __put_user(0, &ubuf
->f_spare
[3]) ||
259 __put_user(0, &ubuf
->f_spare
[4]))
265 * The following statfs calls are copies of code from fs/open.c and
266 * should be checked against those from time to time
268 asmlinkage
long compat_sys_statfs(const char __user
*pathname
, struct compat_statfs __user
*buf
)
273 error
= user_path(pathname
, &path
);
276 error
= vfs_statfs(path
.dentry
, &tmp
);
278 error
= put_compat_statfs(buf
, &tmp
);
284 asmlinkage
long compat_sys_fstatfs(unsigned int fd
, struct compat_statfs __user
*buf
)
294 error
= vfs_statfs(file
->f_path
.dentry
, &tmp
);
296 error
= put_compat_statfs(buf
, &tmp
);
302 static int put_compat_statfs64(struct compat_statfs64 __user
*ubuf
, struct kstatfs
*kbuf
)
304 if (sizeof ubuf
->f_blocks
== 4) {
305 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
306 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
308 /* f_files and f_ffree may be -1; it's okay
309 * to stuff that into 32 bits */
310 if (kbuf
->f_files
!= 0xffffffffffffffffULL
311 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
313 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
314 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
317 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
318 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
319 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
320 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
321 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
322 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
323 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
324 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
325 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
326 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
327 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
328 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
))
333 asmlinkage
long compat_sys_statfs64(const char __user
*pathname
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
338 if (sz
!= sizeof(*buf
))
341 error
= user_path(pathname
, &path
);
344 error
= vfs_statfs(path
.dentry
, &tmp
);
346 error
= put_compat_statfs64(buf
, &tmp
);
352 asmlinkage
long compat_sys_fstatfs64(unsigned int fd
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
358 if (sz
!= sizeof(*buf
))
365 error
= vfs_statfs(file
->f_path
.dentry
, &tmp
);
367 error
= put_compat_statfs64(buf
, &tmp
);
374 * This is a copy of sys_ustat, just dealing with a structure layout.
375 * Given how simple this syscall is that apporach is more maintainable
376 * than the various conversion hacks.
378 asmlinkage
long compat_sys_ustat(unsigned dev
, struct compat_ustat __user
*u
)
380 struct super_block
*sb
;
381 struct compat_ustat tmp
;
385 sb
= user_get_super(new_decode_dev(dev
));
388 err
= vfs_statfs(sb
->s_root
, &sbuf
);
393 memset(&tmp
, 0, sizeof(struct compat_ustat
));
394 tmp
.f_tfree
= sbuf
.f_bfree
;
395 tmp
.f_tinode
= sbuf
.f_ffree
;
396 if (copy_to_user(u
, &tmp
, sizeof(struct compat_ustat
)))
401 static int get_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
403 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
404 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
405 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
406 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
407 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
408 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
413 static int put_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
415 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
416 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
417 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
418 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
419 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
420 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
425 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
426 static int get_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
428 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
429 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
430 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
431 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
432 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
433 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
439 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
440 static int put_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
442 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
443 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
444 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
445 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
446 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
447 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
453 asmlinkage
long compat_sys_fcntl64(unsigned int fd
, unsigned int cmd
,
464 ret
= get_compat_flock(&f
, compat_ptr(arg
));
469 ret
= sys_fcntl(fd
, cmd
, (unsigned long)&f
);
471 if (cmd
== F_GETLK
&& ret
== 0) {
472 /* GETLK was successfule and we need to return the data...
473 * but it needs to fit in the compat structure.
474 * l_start shouldn't be too big, unless the original
475 * start + end is greater than COMPAT_OFF_T_MAX, in which
476 * case the app was asking for trouble, so we return
477 * -EOVERFLOW in that case.
478 * l_len could be too big, in which case we just truncate it,
479 * and only allow the app to see that part of the conflicting
480 * lock that might make sense to it anyway
483 if (f
.l_start
> COMPAT_OFF_T_MAX
)
485 if (f
.l_len
> COMPAT_OFF_T_MAX
)
486 f
.l_len
= COMPAT_OFF_T_MAX
;
488 ret
= put_compat_flock(&f
, compat_ptr(arg
));
495 ret
= get_compat_flock64(&f
, compat_ptr(arg
));
500 ret
= sys_fcntl(fd
, (cmd
== F_GETLK64
) ? F_GETLK
:
501 ((cmd
== F_SETLK64
) ? F_SETLK
: F_SETLKW
),
504 if (cmd
== F_GETLK64
&& ret
== 0) {
505 /* need to return lock information - see above for commentary */
506 if (f
.l_start
> COMPAT_LOFF_T_MAX
)
508 if (f
.l_len
> COMPAT_LOFF_T_MAX
)
509 f
.l_len
= COMPAT_LOFF_T_MAX
;
511 ret
= put_compat_flock64(&f
, compat_ptr(arg
));
516 ret
= sys_fcntl(fd
, cmd
, arg
);
522 asmlinkage
long compat_sys_fcntl(unsigned int fd
, unsigned int cmd
,
525 if ((cmd
== F_GETLK64
) || (cmd
== F_SETLK64
) || (cmd
== F_SETLKW64
))
527 return compat_sys_fcntl64(fd
, cmd
, arg
);
531 compat_sys_io_setup(unsigned nr_reqs
, u32 __user
*ctx32p
)
536 mm_segment_t oldfs
= get_fs();
537 if (unlikely(get_user(ctx64
, ctx32p
)))
541 /* The __user pointer cast is valid because of the set_fs() */
542 ret
= sys_io_setup(nr_reqs
, (aio_context_t __user
*) &ctx64
);
544 /* truncating is ok because it's a user address */
546 ret
= put_user((u32
) ctx64
, ctx32p
);
551 compat_sys_io_getevents(aio_context_t ctx_id
,
552 unsigned long min_nr
,
554 struct io_event __user
*events
,
555 struct compat_timespec __user
*timeout
)
559 struct timespec __user
*ut
= NULL
;
562 if (unlikely(!access_ok(VERIFY_WRITE
, events
,
563 nr
* sizeof(struct io_event
))))
566 if (get_compat_timespec(&t
, timeout
))
569 ut
= compat_alloc_user_space(sizeof(*ut
));
570 if (copy_to_user(ut
, &t
, sizeof(t
)) )
573 ret
= sys_io_getevents(ctx_id
, min_nr
, nr
, events
, ut
);
579 copy_iocb(long nr
, u32 __user
*ptr32
, struct iocb __user
* __user
*ptr64
)
584 for (i
= 0; i
< nr
; ++i
) {
585 if (get_user(uptr
, ptr32
+ i
))
587 if (put_user(compat_ptr(uptr
), ptr64
+ i
))
593 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
596 compat_sys_io_submit(aio_context_t ctx_id
, int nr
, u32 __user
*iocb
)
598 struct iocb __user
* __user
*iocb64
;
601 if (unlikely(nr
< 0))
604 if (nr
> MAX_AIO_SUBMITS
)
605 nr
= MAX_AIO_SUBMITS
;
607 iocb64
= compat_alloc_user_space(nr
* sizeof(*iocb64
));
608 ret
= copy_iocb(nr
, iocb
, iocb64
);
610 ret
= sys_io_submit(ctx_id
, nr
, iocb64
);
614 struct compat_ncp_mount_data
{
615 compat_int_t version
;
616 compat_uint_t ncp_fd
;
617 __compat_uid_t mounted_uid
;
618 compat_pid_t wdog_pid
;
619 unsigned char mounted_vol
[NCP_VOLNAME_LEN
+ 1];
620 compat_uint_t time_out
;
621 compat_uint_t retry_count
;
625 compat_mode_t file_mode
;
626 compat_mode_t dir_mode
;
629 struct compat_ncp_mount_data_v4
{
630 compat_int_t version
;
631 compat_ulong_t flags
;
632 compat_ulong_t mounted_uid
;
633 compat_long_t wdog_pid
;
634 compat_uint_t ncp_fd
;
635 compat_uint_t time_out
;
636 compat_uint_t retry_count
;
639 compat_ulong_t file_mode
;
640 compat_ulong_t dir_mode
;
643 static void *do_ncp_super_data_conv(void *raw_data
)
645 int version
= *(unsigned int *)raw_data
;
648 struct compat_ncp_mount_data
*c_n
= raw_data
;
649 struct ncp_mount_data
*n
= raw_data
;
651 n
->dir_mode
= c_n
->dir_mode
;
652 n
->file_mode
= c_n
->file_mode
;
655 memmove (n
->mounted_vol
, c_n
->mounted_vol
, (sizeof (c_n
->mounted_vol
) + 3 * sizeof (unsigned int)));
656 n
->wdog_pid
= c_n
->wdog_pid
;
657 n
->mounted_uid
= c_n
->mounted_uid
;
658 } else if (version
== 4) {
659 struct compat_ncp_mount_data_v4
*c_n
= raw_data
;
660 struct ncp_mount_data_v4
*n
= raw_data
;
662 n
->dir_mode
= c_n
->dir_mode
;
663 n
->file_mode
= c_n
->file_mode
;
666 n
->retry_count
= c_n
->retry_count
;
667 n
->time_out
= c_n
->time_out
;
668 n
->ncp_fd
= c_n
->ncp_fd
;
669 n
->wdog_pid
= c_n
->wdog_pid
;
670 n
->mounted_uid
= c_n
->mounted_uid
;
671 n
->flags
= c_n
->flags
;
672 } else if (version
!= 5) {
679 struct compat_smb_mount_data
{
680 compat_int_t version
;
681 __compat_uid_t mounted_uid
;
684 compat_mode_t file_mode
;
685 compat_mode_t dir_mode
;
688 static void *do_smb_super_data_conv(void *raw_data
)
690 struct smb_mount_data
*s
= raw_data
;
691 struct compat_smb_mount_data
*c_s
= raw_data
;
693 if (c_s
->version
!= SMB_MOUNT_OLDVERSION
)
695 s
->dir_mode
= c_s
->dir_mode
;
696 s
->file_mode
= c_s
->file_mode
;
699 s
->mounted_uid
= c_s
->mounted_uid
;
704 struct compat_nfs_string
{
709 static inline void compat_nfs_string(struct nfs_string
*dst
,
710 struct compat_nfs_string
*src
)
712 dst
->data
= compat_ptr(src
->data
);
716 struct compat_nfs4_mount_data_v1
{
717 compat_int_t version
;
722 compat_int_t retrans
;
723 compat_int_t acregmin
;
724 compat_int_t acregmax
;
725 compat_int_t acdirmin
;
726 compat_int_t acdirmax
;
727 struct compat_nfs_string client_addr
;
728 struct compat_nfs_string mnt_path
;
729 struct compat_nfs_string hostname
;
730 compat_uint_t host_addrlen
;
731 compat_uptr_t host_addr
;
733 compat_int_t auth_flavourlen
;
734 compat_uptr_t auth_flavours
;
737 static int do_nfs4_super_data_conv(void *raw_data
)
739 int version
= *(compat_uint_t
*) raw_data
;
742 struct compat_nfs4_mount_data_v1
*raw
= raw_data
;
743 struct nfs4_mount_data
*real
= raw_data
;
745 /* copy the fields backwards */
746 real
->auth_flavours
= compat_ptr(raw
->auth_flavours
);
747 real
->auth_flavourlen
= raw
->auth_flavourlen
;
748 real
->proto
= raw
->proto
;
749 real
->host_addr
= compat_ptr(raw
->host_addr
);
750 real
->host_addrlen
= raw
->host_addrlen
;
751 compat_nfs_string(&real
->hostname
, &raw
->hostname
);
752 compat_nfs_string(&real
->mnt_path
, &raw
->mnt_path
);
753 compat_nfs_string(&real
->client_addr
, &raw
->client_addr
);
754 real
->acdirmax
= raw
->acdirmax
;
755 real
->acdirmin
= raw
->acdirmin
;
756 real
->acregmax
= raw
->acregmax
;
757 real
->acregmin
= raw
->acregmin
;
758 real
->retrans
= raw
->retrans
;
759 real
->timeo
= raw
->timeo
;
760 real
->wsize
= raw
->wsize
;
761 real
->rsize
= raw
->rsize
;
762 real
->flags
= raw
->flags
;
763 real
->version
= raw
->version
;
769 #define SMBFS_NAME "smbfs"
770 #define NCPFS_NAME "ncpfs"
771 #define NFS4_NAME "nfs4"
773 asmlinkage
long compat_sys_mount(char __user
* dev_name
, char __user
* dir_name
,
774 char __user
* type
, unsigned long flags
,
777 unsigned long type_page
;
778 unsigned long data_page
;
779 unsigned long dev_page
;
783 retval
= copy_mount_options (type
, &type_page
);
787 dir_page
= getname(dir_name
);
788 retval
= PTR_ERR(dir_page
);
789 if (IS_ERR(dir_page
))
792 retval
= copy_mount_options (dev_name
, &dev_page
);
796 retval
= copy_mount_options (data
, &data_page
);
802 if (type_page
&& data_page
) {
803 if (!strcmp((char *)type_page
, SMBFS_NAME
)) {
804 do_smb_super_data_conv((void *)data_page
);
805 } else if (!strcmp((char *)type_page
, NCPFS_NAME
)) {
806 do_ncp_super_data_conv((void *)data_page
);
807 } else if (!strcmp((char *)type_page
, NFS4_NAME
)) {
808 if (do_nfs4_super_data_conv((void *) data_page
))
814 retval
= do_mount((char*)dev_page
, dir_page
, (char*)type_page
,
815 flags
, (void*)data_page
);
819 free_page(data_page
);
825 free_page(type_page
);
830 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
832 struct compat_old_linux_dirent
{
833 compat_ulong_t d_ino
;
834 compat_ulong_t d_offset
;
835 unsigned short d_namlen
;
839 struct compat_readdir_callback
{
840 struct compat_old_linux_dirent __user
*dirent
;
844 static int compat_fillonedir(void *__buf
, const char *name
, int namlen
,
845 loff_t offset
, u64 ino
, unsigned int d_type
)
847 struct compat_readdir_callback
*buf
= __buf
;
848 struct compat_old_linux_dirent __user
*dirent
;
849 compat_ulong_t d_ino
;
854 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
855 buf
->result
= -EOVERFLOW
;
859 dirent
= buf
->dirent
;
860 if (!access_ok(VERIFY_WRITE
, dirent
,
861 (unsigned long)(dirent
->d_name
+ namlen
+ 1) -
862 (unsigned long)dirent
))
864 if ( __put_user(d_ino
, &dirent
->d_ino
) ||
865 __put_user(offset
, &dirent
->d_offset
) ||
866 __put_user(namlen
, &dirent
->d_namlen
) ||
867 __copy_to_user(dirent
->d_name
, name
, namlen
) ||
868 __put_user(0, dirent
->d_name
+ namlen
))
872 buf
->result
= -EFAULT
;
876 asmlinkage
long compat_sys_old_readdir(unsigned int fd
,
877 struct compat_old_linux_dirent __user
*dirent
, unsigned int count
)
881 struct compat_readdir_callback buf
;
891 error
= vfs_readdir(file
, compat_fillonedir
, &buf
);
900 struct compat_linux_dirent
{
901 compat_ulong_t d_ino
;
902 compat_ulong_t d_off
;
903 unsigned short d_reclen
;
907 struct compat_getdents_callback
{
908 struct compat_linux_dirent __user
*current_dir
;
909 struct compat_linux_dirent __user
*previous
;
914 static int compat_filldir(void *__buf
, const char *name
, int namlen
,
915 loff_t offset
, u64 ino
, unsigned int d_type
)
917 struct compat_linux_dirent __user
* dirent
;
918 struct compat_getdents_callback
*buf
= __buf
;
919 compat_ulong_t d_ino
;
920 int reclen
= ALIGN(NAME_OFFSET(dirent
) + namlen
+ 2, sizeof(compat_long_t
));
922 buf
->error
= -EINVAL
; /* only used if we fail.. */
923 if (reclen
> buf
->count
)
926 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
927 buf
->error
= -EOVERFLOW
;
930 dirent
= buf
->previous
;
932 if (__put_user(offset
, &dirent
->d_off
))
935 dirent
= buf
->current_dir
;
936 if (__put_user(d_ino
, &dirent
->d_ino
))
938 if (__put_user(reclen
, &dirent
->d_reclen
))
940 if (copy_to_user(dirent
->d_name
, name
, namlen
))
942 if (__put_user(0, dirent
->d_name
+ namlen
))
944 if (__put_user(d_type
, (char __user
*) dirent
+ reclen
- 1))
946 buf
->previous
= dirent
;
947 dirent
= (void __user
*)dirent
+ reclen
;
948 buf
->current_dir
= dirent
;
949 buf
->count
-= reclen
;
952 buf
->error
= -EFAULT
;
956 asmlinkage
long compat_sys_getdents(unsigned int fd
,
957 struct compat_linux_dirent __user
*dirent
, unsigned int count
)
960 struct compat_linux_dirent __user
* lastdirent
;
961 struct compat_getdents_callback buf
;
965 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
973 buf
.current_dir
= dirent
;
978 error
= vfs_readdir(file
, compat_filldir
, &buf
);
981 lastdirent
= buf
.previous
;
983 if (put_user(file
->f_pos
, &lastdirent
->d_off
))
986 error
= count
- buf
.count
;
993 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
995 struct compat_getdents_callback64
{
996 struct linux_dirent64 __user
*current_dir
;
997 struct linux_dirent64 __user
*previous
;
1002 static int compat_filldir64(void * __buf
, const char * name
, int namlen
, loff_t offset
,
1003 u64 ino
, unsigned int d_type
)
1005 struct linux_dirent64 __user
*dirent
;
1006 struct compat_getdents_callback64
*buf
= __buf
;
1007 int jj
= NAME_OFFSET(dirent
);
1008 int reclen
= ALIGN(jj
+ namlen
+ 1, sizeof(u64
));
1011 buf
->error
= -EINVAL
; /* only used if we fail.. */
1012 if (reclen
> buf
->count
)
1014 dirent
= buf
->previous
;
1017 if (__put_user_unaligned(offset
, &dirent
->d_off
))
1020 dirent
= buf
->current_dir
;
1021 if (__put_user_unaligned(ino
, &dirent
->d_ino
))
1024 if (__put_user_unaligned(off
, &dirent
->d_off
))
1026 if (__put_user(reclen
, &dirent
->d_reclen
))
1028 if (__put_user(d_type
, &dirent
->d_type
))
1030 if (copy_to_user(dirent
->d_name
, name
, namlen
))
1032 if (__put_user(0, dirent
->d_name
+ namlen
))
1034 buf
->previous
= dirent
;
1035 dirent
= (void __user
*)dirent
+ reclen
;
1036 buf
->current_dir
= dirent
;
1037 buf
->count
-= reclen
;
1040 buf
->error
= -EFAULT
;
1044 asmlinkage
long compat_sys_getdents64(unsigned int fd
,
1045 struct linux_dirent64 __user
* dirent
, unsigned int count
)
1048 struct linux_dirent64 __user
* lastdirent
;
1049 struct compat_getdents_callback64 buf
;
1053 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
1061 buf
.current_dir
= dirent
;
1062 buf
.previous
= NULL
;
1066 error
= vfs_readdir(file
, compat_filldir64
, &buf
);
1069 lastdirent
= buf
.previous
;
1071 typeof(lastdirent
->d_off
) d_off
= file
->f_pos
;
1072 if (__put_user_unaligned(d_off
, &lastdirent
->d_off
))
1075 error
= count
- buf
.count
;
1081 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1083 static ssize_t
compat_do_readv_writev(int type
, struct file
*file
,
1084 const struct compat_iovec __user
*uvector
,
1085 unsigned long nr_segs
, loff_t
*pos
)
1087 compat_ssize_t tot_len
;
1088 struct iovec iovstack
[UIO_FASTIOV
];
1089 struct iovec
*iov
=iovstack
, *vector
;
1096 * SuS says "The readv() function *may* fail if the iovcnt argument
1097 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1098 * traditionally returned zero for zero segments, so...
1105 * First get the "struct iovec" from user memory and
1106 * verify all the pointers
1109 if ((nr_segs
> UIO_MAXIOV
) || (nr_segs
<= 0))
1113 if (nr_segs
> UIO_FASTIOV
) {
1115 iov
= kmalloc(nr_segs
*sizeof(struct iovec
), GFP_KERNEL
);
1120 if (!access_ok(VERIFY_READ
, uvector
, nr_segs
*sizeof(*uvector
)))
1124 * Single unix specification:
1125 * We should -EINVAL if an element length is not >= 0 and fitting an
1126 * ssize_t. The total length is fitting an ssize_t
1128 * Be careful here because iov_len is a size_t not an ssize_t
1133 for (seg
= 0 ; seg
< nr_segs
; seg
++) {
1134 compat_ssize_t tmp
= tot_len
;
1138 if (__get_user(len
, &uvector
->iov_len
) ||
1139 __get_user(buf
, &uvector
->iov_base
)) {
1143 if (len
< 0) /* size_t not fitting an compat_ssize_t .. */
1146 if (tot_len
< tmp
) /* maths overflow on the compat_ssize_t */
1148 vector
->iov_base
= compat_ptr(buf
);
1149 vector
->iov_len
= (compat_size_t
) len
;
1158 ret
= rw_verify_area(type
, file
, pos
, tot_len
);
1164 fn
= file
->f_op
->read
;
1165 fnv
= file
->f_op
->aio_read
;
1167 fn
= (io_fn_t
)file
->f_op
->write
;
1168 fnv
= file
->f_op
->aio_write
;
1172 ret
= do_sync_readv_writev(file
, iov
, nr_segs
, tot_len
,
1175 ret
= do_loop_readv_writev(file
, iov
, nr_segs
, pos
, fn
);
1178 if (iov
!= iovstack
)
1180 if ((ret
+ (type
== READ
)) > 0) {
1181 struct dentry
*dentry
= file
->f_path
.dentry
;
1183 fsnotify_access(dentry
);
1185 fsnotify_modify(dentry
);
1190 static size_t compat_readv(struct file
*file
,
1191 const struct compat_iovec __user
*vec
,
1192 unsigned long vlen
, loff_t
*pos
)
1194 ssize_t ret
= -EBADF
;
1196 if (!(file
->f_mode
& FMODE_READ
))
1200 if (!file
->f_op
|| (!file
->f_op
->aio_read
&& !file
->f_op
->read
))
1203 ret
= compat_do_readv_writev(READ
, file
, vec
, vlen
, pos
);
1207 add_rchar(current
, ret
);
1213 compat_sys_readv(unsigned long fd
, const struct compat_iovec __user
*vec
,
1220 file
= fget_light(fd
, &fput_needed
);
1223 ret
= compat_readv(file
, vec
, vlen
, &file
->f_pos
);
1224 fput_light(file
, fput_needed
);
1229 compat_sys_preadv(unsigned long fd
, const struct compat_iovec __user
*vec
,
1230 unsigned long vlen
, u32 pos_low
, u32 pos_high
)
1232 loff_t pos
= ((loff_t
)pos_high
<< 32) | pos_low
;
1239 file
= fget_light(fd
, &fput_needed
);
1242 ret
= compat_readv(file
, vec
, vlen
, &pos
);
1243 fput_light(file
, fput_needed
);
1247 static size_t compat_writev(struct file
*file
,
1248 const struct compat_iovec __user
*vec
,
1249 unsigned long vlen
, loff_t
*pos
)
1251 ssize_t ret
= -EBADF
;
1253 if (!(file
->f_mode
& FMODE_WRITE
))
1257 if (!file
->f_op
|| (!file
->f_op
->aio_write
&& !file
->f_op
->write
))
1260 ret
= compat_do_readv_writev(WRITE
, file
, vec
, vlen
, pos
);
1264 add_wchar(current
, ret
);
1270 compat_sys_writev(unsigned long fd
, const struct compat_iovec __user
*vec
,
1277 file
= fget_light(fd
, &fput_needed
);
1280 ret
= compat_writev(file
, vec
, vlen
, &file
->f_pos
);
1281 fput_light(file
, fput_needed
);
1286 compat_sys_pwritev(unsigned long fd
, const struct compat_iovec __user
*vec
,
1287 unsigned long vlen
, u32 pos_low
, u32 pos_high
)
1289 loff_t pos
= ((loff_t
)pos_high
<< 32) | pos_low
;
1296 file
= fget_light(fd
, &fput_needed
);
1299 ret
= compat_writev(file
, vec
, vlen
, &pos
);
1300 fput_light(file
, fput_needed
);
1305 compat_sys_vmsplice(int fd
, const struct compat_iovec __user
*iov32
,
1306 unsigned int nr_segs
, unsigned int flags
)
1309 struct iovec __user
*iov
;
1310 if (nr_segs
> UIO_MAXIOV
)
1312 iov
= compat_alloc_user_space(nr_segs
* sizeof(struct iovec
));
1313 for (i
= 0; i
< nr_segs
; i
++) {
1314 struct compat_iovec v
;
1315 if (get_user(v
.iov_base
, &iov32
[i
].iov_base
) ||
1316 get_user(v
.iov_len
, &iov32
[i
].iov_len
) ||
1317 put_user(compat_ptr(v
.iov_base
), &iov
[i
].iov_base
) ||
1318 put_user(v
.iov_len
, &iov
[i
].iov_len
))
1321 return sys_vmsplice(fd
, iov
, nr_segs
, flags
);
1325 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1329 compat_sys_open(const char __user
*filename
, int flags
, int mode
)
1331 return do_sys_open(AT_FDCWD
, filename
, flags
, mode
);
1335 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1339 compat_sys_openat(unsigned int dfd
, const char __user
*filename
, int flags
, int mode
)
1341 return do_sys_open(dfd
, filename
, flags
, mode
);
1345 * compat_count() counts the number of arguments/envelopes. It is basically
1346 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1347 * and envp pointers.
1349 static int compat_count(compat_uptr_t __user
*argv
, int max
)
1357 if (get_user(p
, argv
))
1370 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1371 * except that it works with 32 bit argv and envp pointers.
1373 static int compat_copy_strings(int argc
, compat_uptr_t __user
*argv
,
1374 struct linux_binprm
*bprm
)
1376 struct page
*kmapped_page
= NULL
;
1378 unsigned long kpos
= 0;
1381 while (argc
-- > 0) {
1386 if (get_user(str
, argv
+argc
) ||
1387 !(len
= strnlen_user(compat_ptr(str
), MAX_ARG_STRLEN
))) {
1392 if (len
> MAX_ARG_STRLEN
) {
1397 /* We're going to work our way backwords. */
1403 int offset
, bytes_to_copy
;
1405 offset
= pos
% PAGE_SIZE
;
1409 bytes_to_copy
= offset
;
1410 if (bytes_to_copy
> len
)
1411 bytes_to_copy
= len
;
1413 offset
-= bytes_to_copy
;
1414 pos
-= bytes_to_copy
;
1415 str
-= bytes_to_copy
;
1416 len
-= bytes_to_copy
;
1418 if (!kmapped_page
|| kpos
!= (pos
& PAGE_MASK
)) {
1421 #ifdef CONFIG_STACK_GROWSUP
1422 ret
= expand_stack_downwards(bprm
->vma
, pos
);
1424 /* We've exceed the stack rlimit. */
1429 ret
= get_user_pages(current
, bprm
->mm
, pos
,
1430 1, 1, 1, &page
, NULL
);
1432 /* We've exceed the stack rlimit. */
1438 flush_kernel_dcache_page(kmapped_page
);
1439 kunmap(kmapped_page
);
1440 put_page(kmapped_page
);
1442 kmapped_page
= page
;
1443 kaddr
= kmap(kmapped_page
);
1444 kpos
= pos
& PAGE_MASK
;
1445 flush_cache_page(bprm
->vma
, kpos
,
1446 page_to_pfn(kmapped_page
));
1448 if (copy_from_user(kaddr
+offset
, compat_ptr(str
),
1458 flush_kernel_dcache_page(kmapped_page
);
1459 kunmap(kmapped_page
);
1460 put_page(kmapped_page
);
1466 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1467 * that it processes 32 bit argv and envp pointers.
1469 int compat_do_execve(char * filename
,
1470 compat_uptr_t __user
*argv
,
1471 compat_uptr_t __user
*envp
,
1472 struct pt_regs
* regs
)
1474 struct linux_binprm
*bprm
;
1476 struct files_struct
*displaced
;
1479 retval
= unshare_files(&displaced
);
1484 bprm
= kzalloc(sizeof(*bprm
), GFP_KERNEL
);
1488 retval
= mutex_lock_interruptible(¤t
->cred_exec_mutex
);
1491 current
->in_execve
= 1;
1494 bprm
->cred
= prepare_exec_creds();
1498 retval
= check_unsafe_exec(bprm
);
1502 file
= open_exec(filename
);
1503 retval
= PTR_ERR(file
);
1510 bprm
->filename
= filename
;
1511 bprm
->interp
= filename
;
1513 retval
= bprm_mm_init(bprm
);
1517 bprm
->argc
= compat_count(argv
, MAX_ARG_STRINGS
);
1518 if ((retval
= bprm
->argc
) < 0)
1521 bprm
->envc
= compat_count(envp
, MAX_ARG_STRINGS
);
1522 if ((retval
= bprm
->envc
) < 0)
1525 retval
= prepare_binprm(bprm
);
1529 retval
= copy_strings_kernel(1, &bprm
->filename
, bprm
);
1533 bprm
->exec
= bprm
->p
;
1534 retval
= compat_copy_strings(bprm
->envc
, envp
, bprm
);
1538 retval
= compat_copy_strings(bprm
->argc
, argv
, bprm
);
1542 retval
= search_binary_handler(bprm
, regs
);
1546 /* execve succeeded */
1547 write_lock(¤t
->fs
->lock
);
1548 current
->fs
->in_exec
= 0;
1549 write_unlock(¤t
->fs
->lock
);
1550 current
->in_execve
= 0;
1551 mutex_unlock(¤t
->cred_exec_mutex
);
1552 acct_update_integrals(current
);
1555 put_files_struct(displaced
);
1564 allow_write_access(bprm
->file
);
1569 write_lock(¤t
->fs
->lock
);
1570 current
->fs
->in_exec
= 0;
1571 write_unlock(¤t
->fs
->lock
);
1574 current
->in_execve
= 0;
1575 mutex_unlock(¤t
->cred_exec_mutex
);
1582 reset_files_struct(displaced
);
1587 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1589 static int poll_select_copy_remaining(struct timespec
*end_time
, void __user
*p
,
1590 int timeval
, int ret
)
1597 if (current
->personality
& STICKY_TIMEOUTS
)
1600 /* No update for zero timeout */
1601 if (!end_time
->tv_sec
&& !end_time
->tv_nsec
)
1605 ts
= timespec_sub(*end_time
, ts
);
1607 ts
.tv_sec
= ts
.tv_nsec
= 0;
1610 struct compat_timeval rtv
;
1612 rtv
.tv_sec
= ts
.tv_sec
;
1613 rtv
.tv_usec
= ts
.tv_nsec
/ NSEC_PER_USEC
;
1615 if (!copy_to_user(p
, &rtv
, sizeof(rtv
)))
1618 struct compat_timespec rts
;
1620 rts
.tv_sec
= ts
.tv_sec
;
1621 rts
.tv_nsec
= ts
.tv_nsec
;
1623 if (!copy_to_user(p
, &rts
, sizeof(rts
)))
1627 * If an application puts its timeval in read-only memory, we
1628 * don't want the Linux-specific update to the timeval to
1629 * cause a fault after the select has completed
1630 * successfully. However, because we're not updating the
1631 * timeval, we can't restart the system call.
1635 if (ret
== -ERESTARTNOHAND
)
1641 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1642 * 64-bit unsigned longs.
1645 int compat_get_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1646 unsigned long *fdset
)
1648 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1652 if (!access_ok(VERIFY_WRITE
, ufdset
, nr
*sizeof(compat_ulong_t
)))
1659 if (__get_user(l
, ufdset
) || __get_user(h
, ufdset
+1))
1662 *fdset
++ = h
<< 32 | l
;
1665 if (odd
&& __get_user(*fdset
, ufdset
))
1668 /* Tricky, must clear full unsigned long in the
1669 * kernel fdset at the end, this makes sure that
1672 memset(fdset
, 0, ((nr
+ 1) & ~1)*sizeof(compat_ulong_t
));
1678 int compat_set_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1679 unsigned long *fdset
)
1682 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1693 if (__put_user(l
, ufdset
) || __put_user(h
, ufdset
+1))
1698 if (odd
&& __put_user(*fdset
, ufdset
))
1705 * This is a virtual copy of sys_select from fs/select.c and probably
1706 * should be compared to it from time to time
1710 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1711 * like to be certain this leads to no problems. So I return
1712 * EINTR just for safety.
1714 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1715 * I'm trying ERESTARTNOHAND which restart only when you want to.
1717 #define MAX_SELECT_SECONDS \
1718 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1720 int compat_core_sys_select(int n
, compat_ulong_t __user
*inp
,
1721 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1722 struct timespec
*end_time
)
1726 int size
, max_fds
, ret
= -EINVAL
;
1727 struct fdtable
*fdt
;
1728 long stack_fds
[SELECT_STACK_ALLOC
/sizeof(long)];
1733 /* max_fds can increase, so grab it once to avoid race */
1735 fdt
= files_fdtable(current
->files
);
1736 max_fds
= fdt
->max_fds
;
1742 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1743 * since we used fdset we need to allocate memory in units of
1746 size
= FDS_BYTES(n
);
1748 if (size
> sizeof(stack_fds
) / 6) {
1749 bits
= kmalloc(6 * size
, GFP_KERNEL
);
1754 fds
.in
= (unsigned long *) bits
;
1755 fds
.out
= (unsigned long *) (bits
+ size
);
1756 fds
.ex
= (unsigned long *) (bits
+ 2*size
);
1757 fds
.res_in
= (unsigned long *) (bits
+ 3*size
);
1758 fds
.res_out
= (unsigned long *) (bits
+ 4*size
);
1759 fds
.res_ex
= (unsigned long *) (bits
+ 5*size
);
1761 if ((ret
= compat_get_fd_set(n
, inp
, fds
.in
)) ||
1762 (ret
= compat_get_fd_set(n
, outp
, fds
.out
)) ||
1763 (ret
= compat_get_fd_set(n
, exp
, fds
.ex
)))
1765 zero_fd_set(n
, fds
.res_in
);
1766 zero_fd_set(n
, fds
.res_out
);
1767 zero_fd_set(n
, fds
.res_ex
);
1769 ret
= do_select(n
, &fds
, end_time
);
1774 ret
= -ERESTARTNOHAND
;
1775 if (signal_pending(current
))
1780 if (compat_set_fd_set(n
, inp
, fds
.res_in
) ||
1781 compat_set_fd_set(n
, outp
, fds
.res_out
) ||
1782 compat_set_fd_set(n
, exp
, fds
.res_ex
))
1785 if (bits
!= stack_fds
)
1791 asmlinkage
long compat_sys_select(int n
, compat_ulong_t __user
*inp
,
1792 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1793 struct compat_timeval __user
*tvp
)
1795 struct timespec end_time
, *to
= NULL
;
1796 struct compat_timeval tv
;
1800 if (copy_from_user(&tv
, tvp
, sizeof(tv
)))
1804 if (poll_select_set_timeout(to
,
1805 tv
.tv_sec
+ (tv
.tv_usec
/ USEC_PER_SEC
),
1806 (tv
.tv_usec
% USEC_PER_SEC
) * NSEC_PER_USEC
))
1810 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1811 ret
= poll_select_copy_remaining(&end_time
, tvp
, 1, ret
);
1816 #ifdef HAVE_SET_RESTORE_SIGMASK
1817 static long do_compat_pselect(int n
, compat_ulong_t __user
*inp
,
1818 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1819 struct compat_timespec __user
*tsp
, compat_sigset_t __user
*sigmask
,
1820 compat_size_t sigsetsize
)
1822 compat_sigset_t ss32
;
1823 sigset_t ksigmask
, sigsaved
;
1824 struct compat_timespec ts
;
1825 struct timespec end_time
, *to
= NULL
;
1829 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1833 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1838 if (sigsetsize
!= sizeof(compat_sigset_t
))
1840 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1842 sigset_from_compat(&ksigmask
, &ss32
);
1844 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1845 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1848 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1849 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1851 if (ret
== -ERESTARTNOHAND
) {
1853 * Don't restore the signal mask yet. Let do_signal() deliver
1854 * the signal on the way back to userspace, before the signal
1858 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1860 set_restore_sigmask();
1863 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1868 asmlinkage
long compat_sys_pselect6(int n
, compat_ulong_t __user
*inp
,
1869 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1870 struct compat_timespec __user
*tsp
, void __user
*sig
)
1872 compat_size_t sigsetsize
= 0;
1873 compat_uptr_t up
= 0;
1876 if (!access_ok(VERIFY_READ
, sig
,
1877 sizeof(compat_uptr_t
)+sizeof(compat_size_t
)) ||
1878 __get_user(up
, (compat_uptr_t __user
*)sig
) ||
1879 __get_user(sigsetsize
,
1880 (compat_size_t __user
*)(sig
+sizeof(up
))))
1883 return do_compat_pselect(n
, inp
, outp
, exp
, tsp
, compat_ptr(up
),
1887 asmlinkage
long compat_sys_ppoll(struct pollfd __user
*ufds
,
1888 unsigned int nfds
, struct compat_timespec __user
*tsp
,
1889 const compat_sigset_t __user
*sigmask
, compat_size_t sigsetsize
)
1891 compat_sigset_t ss32
;
1892 sigset_t ksigmask
, sigsaved
;
1893 struct compat_timespec ts
;
1894 struct timespec end_time
, *to
= NULL
;
1898 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1902 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1907 if (sigsetsize
!= sizeof(compat_sigset_t
))
1909 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1911 sigset_from_compat(&ksigmask
, &ss32
);
1913 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1914 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1917 ret
= do_sys_poll(ufds
, nfds
, to
);
1919 /* We can restart this syscall, usually */
1920 if (ret
== -EINTR
) {
1922 * Don't restore the signal mask yet. Let do_signal() deliver
1923 * the signal on the way back to userspace, before the signal
1927 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1929 set_restore_sigmask();
1931 ret
= -ERESTARTNOHAND
;
1933 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1935 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1939 #endif /* HAVE_SET_RESTORE_SIGMASK */
1941 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1942 /* Stuff for NFS server syscalls... */
1943 struct compat_nfsctl_svc
{
1948 struct compat_nfsctl_client
{
1949 s8 cl32_ident
[NFSCLNT_IDMAX
+1];
1951 struct in_addr cl32_addrlist
[NFSCLNT_ADDRMAX
];
1954 u8 cl32_fhkey
[NFSCLNT_KEYMAX
];
1957 struct compat_nfsctl_export
{
1958 char ex32_client
[NFSCLNT_IDMAX
+1];
1959 char ex32_path
[NFS_MAXPATHLEN
+1];
1960 compat_dev_t ex32_dev
;
1961 compat_ino_t ex32_ino
;
1962 compat_int_t ex32_flags
;
1963 __compat_uid_t ex32_anon_uid
;
1964 __compat_gid_t ex32_anon_gid
;
1967 struct compat_nfsctl_fdparm
{
1968 struct sockaddr gd32_addr
;
1969 s8 gd32_path
[NFS_MAXPATHLEN
+1];
1970 compat_int_t gd32_version
;
1973 struct compat_nfsctl_fsparm
{
1974 struct sockaddr gd32_addr
;
1975 s8 gd32_path
[NFS_MAXPATHLEN
+1];
1976 compat_int_t gd32_maxlen
;
1979 struct compat_nfsctl_arg
{
1980 compat_int_t ca32_version
; /* safeguard */
1982 struct compat_nfsctl_svc u32_svc
;
1983 struct compat_nfsctl_client u32_client
;
1984 struct compat_nfsctl_export u32_export
;
1985 struct compat_nfsctl_fdparm u32_getfd
;
1986 struct compat_nfsctl_fsparm u32_getfs
;
1988 #define ca32_svc u.u32_svc
1989 #define ca32_client u.u32_client
1990 #define ca32_export u.u32_export
1991 #define ca32_getfd u.u32_getfd
1992 #define ca32_getfs u.u32_getfs
1995 union compat_nfsctl_res
{
1996 __u8 cr32_getfh
[NFS_FHSIZE
];
1997 struct knfsd_fh cr32_getfs
;
2000 static int compat_nfs_svc_trans(struct nfsctl_arg
*karg
,
2001 struct compat_nfsctl_arg __user
*arg
)
2003 if (!access_ok(VERIFY_READ
, &arg
->ca32_svc
, sizeof(arg
->ca32_svc
)) ||
2004 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2005 __get_user(karg
->ca_svc
.svc_port
, &arg
->ca32_svc
.svc32_port
) ||
2006 __get_user(karg
->ca_svc
.svc_nthreads
,
2007 &arg
->ca32_svc
.svc32_nthreads
))
2012 static int compat_nfs_clnt_trans(struct nfsctl_arg
*karg
,
2013 struct compat_nfsctl_arg __user
*arg
)
2015 if (!access_ok(VERIFY_READ
, &arg
->ca32_client
,
2016 sizeof(arg
->ca32_client
)) ||
2017 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2018 __copy_from_user(&karg
->ca_client
.cl_ident
[0],
2019 &arg
->ca32_client
.cl32_ident
[0],
2021 __get_user(karg
->ca_client
.cl_naddr
,
2022 &arg
->ca32_client
.cl32_naddr
) ||
2023 __copy_from_user(&karg
->ca_client
.cl_addrlist
[0],
2024 &arg
->ca32_client
.cl32_addrlist
[0],
2025 (sizeof(struct in_addr
) * NFSCLNT_ADDRMAX
)) ||
2026 __get_user(karg
->ca_client
.cl_fhkeytype
,
2027 &arg
->ca32_client
.cl32_fhkeytype
) ||
2028 __get_user(karg
->ca_client
.cl_fhkeylen
,
2029 &arg
->ca32_client
.cl32_fhkeylen
) ||
2030 __copy_from_user(&karg
->ca_client
.cl_fhkey
[0],
2031 &arg
->ca32_client
.cl32_fhkey
[0],
2038 static int compat_nfs_exp_trans(struct nfsctl_arg
*karg
,
2039 struct compat_nfsctl_arg __user
*arg
)
2041 if (!access_ok(VERIFY_READ
, &arg
->ca32_export
,
2042 sizeof(arg
->ca32_export
)) ||
2043 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2044 __copy_from_user(&karg
->ca_export
.ex_client
[0],
2045 &arg
->ca32_export
.ex32_client
[0],
2047 __copy_from_user(&karg
->ca_export
.ex_path
[0],
2048 &arg
->ca32_export
.ex32_path
[0],
2050 __get_user(karg
->ca_export
.ex_dev
,
2051 &arg
->ca32_export
.ex32_dev
) ||
2052 __get_user(karg
->ca_export
.ex_ino
,
2053 &arg
->ca32_export
.ex32_ino
) ||
2054 __get_user(karg
->ca_export
.ex_flags
,
2055 &arg
->ca32_export
.ex32_flags
) ||
2056 __get_user(karg
->ca_export
.ex_anon_uid
,
2057 &arg
->ca32_export
.ex32_anon_uid
) ||
2058 __get_user(karg
->ca_export
.ex_anon_gid
,
2059 &arg
->ca32_export
.ex32_anon_gid
))
2061 SET_UID(karg
->ca_export
.ex_anon_uid
, karg
->ca_export
.ex_anon_uid
);
2062 SET_GID(karg
->ca_export
.ex_anon_gid
, karg
->ca_export
.ex_anon_gid
);
2067 static int compat_nfs_getfd_trans(struct nfsctl_arg
*karg
,
2068 struct compat_nfsctl_arg __user
*arg
)
2070 if (!access_ok(VERIFY_READ
, &arg
->ca32_getfd
,
2071 sizeof(arg
->ca32_getfd
)) ||
2072 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2073 __copy_from_user(&karg
->ca_getfd
.gd_addr
,
2074 &arg
->ca32_getfd
.gd32_addr
,
2075 (sizeof(struct sockaddr
))) ||
2076 __copy_from_user(&karg
->ca_getfd
.gd_path
,
2077 &arg
->ca32_getfd
.gd32_path
,
2078 (NFS_MAXPATHLEN
+1)) ||
2079 __get_user(karg
->ca_getfd
.gd_version
,
2080 &arg
->ca32_getfd
.gd32_version
))
2086 static int compat_nfs_getfs_trans(struct nfsctl_arg
*karg
,
2087 struct compat_nfsctl_arg __user
*arg
)
2089 if (!access_ok(VERIFY_READ
,&arg
->ca32_getfs
,sizeof(arg
->ca32_getfs
)) ||
2090 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2091 __copy_from_user(&karg
->ca_getfs
.gd_addr
,
2092 &arg
->ca32_getfs
.gd32_addr
,
2093 (sizeof(struct sockaddr
))) ||
2094 __copy_from_user(&karg
->ca_getfs
.gd_path
,
2095 &arg
->ca32_getfs
.gd32_path
,
2096 (NFS_MAXPATHLEN
+1)) ||
2097 __get_user(karg
->ca_getfs
.gd_maxlen
,
2098 &arg
->ca32_getfs
.gd32_maxlen
))
2104 /* This really doesn't need translations, we are only passing
2105 * back a union which contains opaque nfs file handle data.
2107 static int compat_nfs_getfh_res_trans(union nfsctl_res
*kres
,
2108 union compat_nfsctl_res __user
*res
)
2112 err
= copy_to_user(res
, kres
, sizeof(*res
));
2114 return (err
) ? -EFAULT
: 0;
2117 asmlinkage
long compat_sys_nfsservctl(int cmd
,
2118 struct compat_nfsctl_arg __user
*arg
,
2119 union compat_nfsctl_res __user
*res
)
2121 struct nfsctl_arg
*karg
;
2122 union nfsctl_res
*kres
;
2126 karg
= kmalloc(sizeof(*karg
), GFP_USER
);
2127 kres
= kmalloc(sizeof(*kres
), GFP_USER
);
2128 if(!karg
|| !kres
) {
2135 err
= compat_nfs_svc_trans(karg
, arg
);
2138 case NFSCTL_ADDCLIENT
:
2139 err
= compat_nfs_clnt_trans(karg
, arg
);
2142 case NFSCTL_DELCLIENT
:
2143 err
= compat_nfs_clnt_trans(karg
, arg
);
2147 case NFSCTL_UNEXPORT
:
2148 err
= compat_nfs_exp_trans(karg
, arg
);
2152 err
= compat_nfs_getfd_trans(karg
, arg
);
2156 err
= compat_nfs_getfs_trans(karg
, arg
);
2169 /* The __user pointer casts are valid because of the set_fs() */
2170 err
= sys_nfsservctl(cmd
, (void __user
*) karg
, (void __user
*) kres
);
2176 if((cmd
== NFSCTL_GETFD
) ||
2177 (cmd
== NFSCTL_GETFS
))
2178 err
= compat_nfs_getfh_res_trans(kres
, res
);
2186 long asmlinkage
compat_sys_nfsservctl(int cmd
, void *notused
, void *notused2
)
2188 return sys_ni_syscall();
2194 #ifdef HAVE_SET_RESTORE_SIGMASK
2195 asmlinkage
long compat_sys_epoll_pwait(int epfd
,
2196 struct compat_epoll_event __user
*events
,
2197 int maxevents
, int timeout
,
2198 const compat_sigset_t __user
*sigmask
,
2199 compat_size_t sigsetsize
)
2202 compat_sigset_t csigmask
;
2203 sigset_t ksigmask
, sigsaved
;
2206 * If the caller wants a certain signal mask to be set during the wait,
2210 if (sigsetsize
!= sizeof(compat_sigset_t
))
2212 if (copy_from_user(&csigmask
, sigmask
, sizeof(csigmask
)))
2214 sigset_from_compat(&ksigmask
, &csigmask
);
2215 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
) | sigmask(SIGSTOP
));
2216 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
2219 err
= sys_epoll_wait(epfd
, events
, maxevents
, timeout
);
2222 * If we changed the signal mask, we need to restore the original one.
2223 * In case we've got a signal while waiting, we do not restore the
2224 * signal mask yet, and we allow do_signal() to deliver the signal on
2225 * the way back to userspace, before the signal mask is restored.
2228 if (err
== -EINTR
) {
2229 memcpy(¤t
->saved_sigmask
, &sigsaved
,
2231 set_restore_sigmask();
2233 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
2238 #endif /* HAVE_SET_RESTORE_SIGMASK */
2240 #endif /* CONFIG_EPOLL */
2242 #ifdef CONFIG_SIGNALFD
2244 asmlinkage
long compat_sys_signalfd4(int ufd
,
2245 const compat_sigset_t __user
*sigmask
,
2246 compat_size_t sigsetsize
, int flags
)
2248 compat_sigset_t ss32
;
2250 sigset_t __user
*ksigmask
;
2252 if (sigsetsize
!= sizeof(compat_sigset_t
))
2254 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
2256 sigset_from_compat(&tmp
, &ss32
);
2257 ksigmask
= compat_alloc_user_space(sizeof(sigset_t
));
2258 if (copy_to_user(ksigmask
, &tmp
, sizeof(sigset_t
)))
2261 return sys_signalfd4(ufd
, ksigmask
, sizeof(sigset_t
), flags
);
2264 asmlinkage
long compat_sys_signalfd(int ufd
,
2265 const compat_sigset_t __user
*sigmask
,
2266 compat_size_t sigsetsize
)
2268 return compat_sys_signalfd4(ufd
, sigmask
, sigsetsize
, 0);
2270 #endif /* CONFIG_SIGNALFD */
2272 #ifdef CONFIG_TIMERFD
2274 asmlinkage
long compat_sys_timerfd_settime(int ufd
, int flags
,
2275 const struct compat_itimerspec __user
*utmr
,
2276 struct compat_itimerspec __user
*otmr
)
2279 struct itimerspec t
;
2280 struct itimerspec __user
*ut
;
2282 if (get_compat_itimerspec(&t
, utmr
))
2284 ut
= compat_alloc_user_space(2 * sizeof(struct itimerspec
));
2285 if (copy_to_user(&ut
[0], &t
, sizeof(t
)))
2287 error
= sys_timerfd_settime(ufd
, flags
, &ut
[0], &ut
[1]);
2289 error
= (copy_from_user(&t
, &ut
[1], sizeof(struct itimerspec
)) ||
2290 put_compat_itimerspec(otmr
, &t
)) ? -EFAULT
: 0;
2295 asmlinkage
long compat_sys_timerfd_gettime(int ufd
,
2296 struct compat_itimerspec __user
*otmr
)
2299 struct itimerspec t
;
2300 struct itimerspec __user
*ut
;
2302 ut
= compat_alloc_user_space(sizeof(struct itimerspec
));
2303 error
= sys_timerfd_gettime(ufd
, ut
);
2305 error
= (copy_from_user(&t
, ut
, sizeof(struct itimerspec
)) ||
2306 put_compat_itimerspec(otmr
, &t
)) ? -EFAULT
: 0;
2311 #endif /* CONFIG_TIMERFD */