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@ucw.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/stddef.h>
19 #include <linux/kernel.h>
20 #include <linux/linkage.h>
21 #include <linux/compat.h>
22 #include <linux/errno.h>
23 #include <linux/time.h>
25 #include <linux/fcntl.h>
26 #include <linux/namei.h>
27 #include <linux/file.h>
28 #include <linux/fdtable.h>
29 #include <linux/vfs.h>
30 #include <linux/ioctl.h>
31 #include <linux/init.h>
32 #include <linux/ncp_mount.h>
33 #include <linux/nfs4_mount.h>
34 #include <linux/syscalls.h>
35 #include <linux/ctype.h>
36 #include <linux/module.h>
37 #include <linux/dirent.h>
38 #include <linux/fsnotify.h>
39 #include <linux/highuid.h>
40 #include <linux/nfsd/syscall.h>
41 #include <linux/personality.h>
42 #include <linux/rwsem.h>
43 #include <linux/tsacct_kern.h>
44 #include <linux/security.h>
45 #include <linux/highmem.h>
46 #include <linux/signal.h>
47 #include <linux/poll.h>
49 #include <linux/eventpoll.h>
50 #include <linux/fs_struct.h>
51 #include <linux/slab.h>
53 #include <asm/uaccess.h>
54 #include <asm/mmu_context.h>
55 #include <asm/ioctls.h>
60 int compat_printk(const char *fmt
, ...)
67 ret
= vprintk(fmt
, ap
);
72 #include "read_write.h"
75 * Not all architectures have sys_utime, so implement this in terms
78 asmlinkage
long compat_sys_utime(const char __user
*filename
,
79 struct compat_utimbuf __user
*t
)
81 struct timespec tv
[2];
84 if (get_user(tv
[0].tv_sec
, &t
->actime
) ||
85 get_user(tv
[1].tv_sec
, &t
->modtime
))
90 return do_utimes(AT_FDCWD
, filename
, t
? tv
: NULL
, 0);
93 asmlinkage
long compat_sys_utimensat(unsigned int dfd
, const char __user
*filename
, struct compat_timespec __user
*t
, int flags
)
95 struct timespec tv
[2];
98 if (get_compat_timespec(&tv
[0], &t
[0]) ||
99 get_compat_timespec(&tv
[1], &t
[1]))
102 if (tv
[0].tv_nsec
== UTIME_OMIT
&& tv
[1].tv_nsec
== UTIME_OMIT
)
105 return do_utimes(dfd
, filename
, t
? tv
: NULL
, flags
);
108 asmlinkage
long compat_sys_futimesat(unsigned int dfd
, const char __user
*filename
, struct compat_timeval __user
*t
)
110 struct timespec tv
[2];
113 if (get_user(tv
[0].tv_sec
, &t
[0].tv_sec
) ||
114 get_user(tv
[0].tv_nsec
, &t
[0].tv_usec
) ||
115 get_user(tv
[1].tv_sec
, &t
[1].tv_sec
) ||
116 get_user(tv
[1].tv_nsec
, &t
[1].tv_usec
))
118 if (tv
[0].tv_nsec
>= 1000000 || tv
[0].tv_nsec
< 0 ||
119 tv
[1].tv_nsec
>= 1000000 || tv
[1].tv_nsec
< 0)
121 tv
[0].tv_nsec
*= 1000;
122 tv
[1].tv_nsec
*= 1000;
124 return do_utimes(dfd
, filename
, t
? tv
: NULL
, 0);
127 asmlinkage
long compat_sys_utimes(const char __user
*filename
, struct compat_timeval __user
*t
)
129 return compat_sys_futimesat(AT_FDCWD
, filename
, t
);
132 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
134 compat_ino_t ino
= stat
->ino
;
135 typeof(ubuf
->st_uid
) uid
= 0;
136 typeof(ubuf
->st_gid
) gid
= 0;
139 SET_UID(uid
, stat
->uid
);
140 SET_GID(gid
, stat
->gid
);
142 if ((u64
) stat
->size
> MAX_NON_LFS
||
143 !old_valid_dev(stat
->dev
) ||
144 !old_valid_dev(stat
->rdev
))
146 if (sizeof(ino
) < sizeof(stat
->ino
) && ino
!= stat
->ino
)
149 if (clear_user(ubuf
, sizeof(*ubuf
)))
152 err
= __put_user(old_encode_dev(stat
->dev
), &ubuf
->st_dev
);
153 err
|= __put_user(ino
, &ubuf
->st_ino
);
154 err
|= __put_user(stat
->mode
, &ubuf
->st_mode
);
155 err
|= __put_user(stat
->nlink
, &ubuf
->st_nlink
);
156 err
|= __put_user(uid
, &ubuf
->st_uid
);
157 err
|= __put_user(gid
, &ubuf
->st_gid
);
158 err
|= __put_user(old_encode_dev(stat
->rdev
), &ubuf
->st_rdev
);
159 err
|= __put_user(stat
->size
, &ubuf
->st_size
);
160 err
|= __put_user(stat
->atime
.tv_sec
, &ubuf
->st_atime
);
161 err
|= __put_user(stat
->atime
.tv_nsec
, &ubuf
->st_atime_nsec
);
162 err
|= __put_user(stat
->mtime
.tv_sec
, &ubuf
->st_mtime
);
163 err
|= __put_user(stat
->mtime
.tv_nsec
, &ubuf
->st_mtime_nsec
);
164 err
|= __put_user(stat
->ctime
.tv_sec
, &ubuf
->st_ctime
);
165 err
|= __put_user(stat
->ctime
.tv_nsec
, &ubuf
->st_ctime_nsec
);
166 err
|= __put_user(stat
->blksize
, &ubuf
->st_blksize
);
167 err
|= __put_user(stat
->blocks
, &ubuf
->st_blocks
);
171 asmlinkage
long compat_sys_newstat(const char __user
* filename
,
172 struct compat_stat __user
*statbuf
)
177 error
= vfs_stat(filename
, &stat
);
180 return cp_compat_stat(&stat
, statbuf
);
183 asmlinkage
long compat_sys_newlstat(const char __user
* filename
,
184 struct compat_stat __user
*statbuf
)
189 error
= vfs_lstat(filename
, &stat
);
192 return cp_compat_stat(&stat
, statbuf
);
195 #ifndef __ARCH_WANT_STAT64
196 asmlinkage
long compat_sys_newfstatat(unsigned int dfd
,
197 const char __user
*filename
,
198 struct compat_stat __user
*statbuf
, int flag
)
203 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
206 return cp_compat_stat(&stat
, statbuf
);
210 asmlinkage
long compat_sys_newfstat(unsigned int fd
,
211 struct compat_stat __user
* statbuf
)
214 int error
= vfs_fstat(fd
, &stat
);
217 error
= cp_compat_stat(&stat
, statbuf
);
221 static int put_compat_statfs(struct compat_statfs __user
*ubuf
, struct kstatfs
*kbuf
)
224 if (sizeof ubuf
->f_blocks
== 4) {
225 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
226 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
228 /* f_files and f_ffree may be -1; it's okay
229 * to stuff that into 32 bits */
230 if (kbuf
->f_files
!= 0xffffffffffffffffULL
231 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
233 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
234 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
237 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
238 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
239 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
240 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
241 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
242 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
243 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
244 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
245 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
246 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
247 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
248 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
) ||
249 __put_user(0, &ubuf
->f_spare
[0]) ||
250 __put_user(0, &ubuf
->f_spare
[1]) ||
251 __put_user(0, &ubuf
->f_spare
[2]) ||
252 __put_user(0, &ubuf
->f_spare
[3]) ||
253 __put_user(0, &ubuf
->f_spare
[4]))
259 * The following statfs calls are copies of code from fs/open.c and
260 * should be checked against those from time to time
262 asmlinkage
long compat_sys_statfs(const char __user
*pathname
, struct compat_statfs __user
*buf
)
267 error
= user_path(pathname
, &path
);
270 error
= vfs_statfs(&path
, &tmp
);
272 error
= put_compat_statfs(buf
, &tmp
);
278 asmlinkage
long compat_sys_fstatfs(unsigned int fd
, struct compat_statfs __user
*buf
)
288 error
= vfs_statfs(&file
->f_path
, &tmp
);
290 error
= put_compat_statfs(buf
, &tmp
);
296 static int put_compat_statfs64(struct compat_statfs64 __user
*ubuf
, struct kstatfs
*kbuf
)
298 if (sizeof ubuf
->f_blocks
== 4) {
299 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
300 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
302 /* f_files and f_ffree may be -1; it's okay
303 * to stuff that into 32 bits */
304 if (kbuf
->f_files
!= 0xffffffffffffffffULL
305 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
307 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
308 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
311 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
312 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
313 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
314 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
315 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
316 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
317 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
318 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
319 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
320 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
321 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
322 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
))
327 asmlinkage
long compat_sys_statfs64(const char __user
*pathname
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
332 if (sz
!= sizeof(*buf
))
335 error
= user_path(pathname
, &path
);
338 error
= vfs_statfs(&path
, &tmp
);
340 error
= put_compat_statfs64(buf
, &tmp
);
346 asmlinkage
long compat_sys_fstatfs64(unsigned int fd
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
352 if (sz
!= sizeof(*buf
))
359 error
= vfs_statfs(&file
->f_path
, &tmp
);
361 error
= put_compat_statfs64(buf
, &tmp
);
368 * This is a copy of sys_ustat, just dealing with a structure layout.
369 * Given how simple this syscall is that apporach is more maintainable
370 * than the various conversion hacks.
372 asmlinkage
long compat_sys_ustat(unsigned dev
, struct compat_ustat __user
*u
)
374 struct super_block
*sb
;
375 struct compat_ustat tmp
;
379 sb
= user_get_super(new_decode_dev(dev
));
382 err
= statfs_by_dentry(sb
->s_root
, &sbuf
);
387 memset(&tmp
, 0, sizeof(struct compat_ustat
));
388 tmp
.f_tfree
= sbuf
.f_bfree
;
389 tmp
.f_tinode
= sbuf
.f_ffree
;
390 if (copy_to_user(u
, &tmp
, sizeof(struct compat_ustat
)))
395 static int get_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
397 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
398 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
399 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
400 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
401 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
402 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
407 static int put_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
409 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
410 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
411 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
412 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
413 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
414 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
419 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
420 static int get_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
422 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
423 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
424 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
425 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
426 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
427 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
433 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
434 static int put_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
436 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
437 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
438 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
439 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
440 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
441 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
447 asmlinkage
long compat_sys_fcntl64(unsigned int fd
, unsigned int cmd
,
458 ret
= get_compat_flock(&f
, compat_ptr(arg
));
463 ret
= sys_fcntl(fd
, cmd
, (unsigned long)&f
);
465 if (cmd
== F_GETLK
&& ret
== 0) {
466 /* GETLK was successful and we need to return the data...
467 * but it needs to fit in the compat structure.
468 * l_start shouldn't be too big, unless the original
469 * start + end is greater than COMPAT_OFF_T_MAX, in which
470 * case the app was asking for trouble, so we return
471 * -EOVERFLOW in that case.
472 * l_len could be too big, in which case we just truncate it,
473 * and only allow the app to see that part of the conflicting
474 * lock that might make sense to it anyway
477 if (f
.l_start
> COMPAT_OFF_T_MAX
)
479 if (f
.l_len
> COMPAT_OFF_T_MAX
)
480 f
.l_len
= COMPAT_OFF_T_MAX
;
482 ret
= put_compat_flock(&f
, compat_ptr(arg
));
489 ret
= get_compat_flock64(&f
, compat_ptr(arg
));
494 ret
= sys_fcntl(fd
, (cmd
== F_GETLK64
) ? F_GETLK
:
495 ((cmd
== F_SETLK64
) ? F_SETLK
: F_SETLKW
),
498 if (cmd
== F_GETLK64
&& ret
== 0) {
499 /* need to return lock information - see above for commentary */
500 if (f
.l_start
> COMPAT_LOFF_T_MAX
)
502 if (f
.l_len
> COMPAT_LOFF_T_MAX
)
503 f
.l_len
= COMPAT_LOFF_T_MAX
;
505 ret
= put_compat_flock64(&f
, compat_ptr(arg
));
510 ret
= sys_fcntl(fd
, cmd
, arg
);
516 asmlinkage
long compat_sys_fcntl(unsigned int fd
, unsigned int cmd
,
519 if ((cmd
== F_GETLK64
) || (cmd
== F_SETLK64
) || (cmd
== F_SETLKW64
))
521 return compat_sys_fcntl64(fd
, cmd
, arg
);
525 compat_sys_io_setup(unsigned nr_reqs
, u32 __user
*ctx32p
)
530 mm_segment_t oldfs
= get_fs();
531 if (unlikely(get_user(ctx64
, ctx32p
)))
535 /* The __user pointer cast is valid because of the set_fs() */
536 ret
= sys_io_setup(nr_reqs
, (aio_context_t __user
*) &ctx64
);
538 /* truncating is ok because it's a user address */
540 ret
= put_user((u32
) ctx64
, ctx32p
);
545 compat_sys_io_getevents(aio_context_t ctx_id
,
546 unsigned long min_nr
,
548 struct io_event __user
*events
,
549 struct compat_timespec __user
*timeout
)
553 struct timespec __user
*ut
= NULL
;
556 if (unlikely(!access_ok(VERIFY_WRITE
, events
,
557 nr
* sizeof(struct io_event
))))
560 if (get_compat_timespec(&t
, timeout
))
563 ut
= compat_alloc_user_space(sizeof(*ut
));
564 if (copy_to_user(ut
, &t
, sizeof(t
)) )
567 ret
= sys_io_getevents(ctx_id
, min_nr
, nr
, events
, ut
);
572 /* A write operation does a read from user space and vice versa */
573 #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
575 ssize_t
compat_rw_copy_check_uvector(int type
,
576 const struct compat_iovec __user
*uvector
, unsigned long nr_segs
,
577 unsigned long fast_segs
, struct iovec
*fast_pointer
,
578 struct iovec
**ret_pointer
)
580 compat_ssize_t tot_len
;
581 struct iovec
*iov
= *ret_pointer
= fast_pointer
;
586 * SuS says "The readv() function *may* fail if the iovcnt argument
587 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
588 * traditionally returned zero for zero segments, so...
594 if (nr_segs
> UIO_MAXIOV
|| nr_segs
< 0)
596 if (nr_segs
> fast_segs
) {
598 iov
= kmalloc(nr_segs
*sizeof(struct iovec
), GFP_KERNEL
);
600 *ret_pointer
= fast_pointer
;
607 * Single unix specification:
608 * We should -EINVAL if an element length is not >= 0 and fitting an
609 * ssize_t. The total length is fitting an ssize_t
611 * Be careful here because iov_len is a size_t not an ssize_t
615 for (seg
= 0; seg
< nr_segs
; seg
++) {
616 compat_ssize_t tmp
= tot_len
;
620 if (__get_user(len
, &uvector
->iov_len
) ||
621 __get_user(buf
, &uvector
->iov_base
)) {
625 if (len
< 0) /* size_t not fitting in compat_ssize_t .. */
628 if (tot_len
< tmp
) /* maths overflow on the compat_ssize_t */
630 if (!access_ok(vrfy_dir(type
), compat_ptr(buf
), len
)) {
634 iov
->iov_base
= compat_ptr(buf
);
635 iov
->iov_len
= (compat_size_t
) len
;
646 copy_iocb(long nr
, u32 __user
*ptr32
, struct iocb __user
* __user
*ptr64
)
651 for (i
= 0; i
< nr
; ++i
) {
652 if (get_user(uptr
, ptr32
+ i
))
654 if (put_user(compat_ptr(uptr
), ptr64
+ i
))
660 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
663 compat_sys_io_submit(aio_context_t ctx_id
, int nr
, u32 __user
*iocb
)
665 struct iocb __user
* __user
*iocb64
;
668 if (unlikely(nr
< 0))
671 if (nr
> MAX_AIO_SUBMITS
)
672 nr
= MAX_AIO_SUBMITS
;
674 iocb64
= compat_alloc_user_space(nr
* sizeof(*iocb64
));
675 ret
= copy_iocb(nr
, iocb
, iocb64
);
677 ret
= do_io_submit(ctx_id
, nr
, iocb64
, 1);
681 struct compat_ncp_mount_data
{
682 compat_int_t version
;
683 compat_uint_t ncp_fd
;
684 __compat_uid_t mounted_uid
;
685 compat_pid_t wdog_pid
;
686 unsigned char mounted_vol
[NCP_VOLNAME_LEN
+ 1];
687 compat_uint_t time_out
;
688 compat_uint_t retry_count
;
692 compat_mode_t file_mode
;
693 compat_mode_t dir_mode
;
696 struct compat_ncp_mount_data_v4
{
697 compat_int_t version
;
698 compat_ulong_t flags
;
699 compat_ulong_t mounted_uid
;
700 compat_long_t wdog_pid
;
701 compat_uint_t ncp_fd
;
702 compat_uint_t time_out
;
703 compat_uint_t retry_count
;
706 compat_ulong_t file_mode
;
707 compat_ulong_t dir_mode
;
710 static void *do_ncp_super_data_conv(void *raw_data
)
712 int version
= *(unsigned int *)raw_data
;
715 struct compat_ncp_mount_data
*c_n
= raw_data
;
716 struct ncp_mount_data
*n
= raw_data
;
718 n
->dir_mode
= c_n
->dir_mode
;
719 n
->file_mode
= c_n
->file_mode
;
722 memmove (n
->mounted_vol
, c_n
->mounted_vol
, (sizeof (c_n
->mounted_vol
) + 3 * sizeof (unsigned int)));
723 n
->wdog_pid
= c_n
->wdog_pid
;
724 n
->mounted_uid
= c_n
->mounted_uid
;
725 } else if (version
== 4) {
726 struct compat_ncp_mount_data_v4
*c_n
= raw_data
;
727 struct ncp_mount_data_v4
*n
= raw_data
;
729 n
->dir_mode
= c_n
->dir_mode
;
730 n
->file_mode
= c_n
->file_mode
;
733 n
->retry_count
= c_n
->retry_count
;
734 n
->time_out
= c_n
->time_out
;
735 n
->ncp_fd
= c_n
->ncp_fd
;
736 n
->wdog_pid
= c_n
->wdog_pid
;
737 n
->mounted_uid
= c_n
->mounted_uid
;
738 n
->flags
= c_n
->flags
;
739 } else if (version
!= 5) {
747 struct compat_nfs_string
{
752 static inline void compat_nfs_string(struct nfs_string
*dst
,
753 struct compat_nfs_string
*src
)
755 dst
->data
= compat_ptr(src
->data
);
759 struct compat_nfs4_mount_data_v1
{
760 compat_int_t version
;
765 compat_int_t retrans
;
766 compat_int_t acregmin
;
767 compat_int_t acregmax
;
768 compat_int_t acdirmin
;
769 compat_int_t acdirmax
;
770 struct compat_nfs_string client_addr
;
771 struct compat_nfs_string mnt_path
;
772 struct compat_nfs_string hostname
;
773 compat_uint_t host_addrlen
;
774 compat_uptr_t host_addr
;
776 compat_int_t auth_flavourlen
;
777 compat_uptr_t auth_flavours
;
780 static int do_nfs4_super_data_conv(void *raw_data
)
782 int version
= *(compat_uint_t
*) raw_data
;
785 struct compat_nfs4_mount_data_v1
*raw
= raw_data
;
786 struct nfs4_mount_data
*real
= raw_data
;
788 /* copy the fields backwards */
789 real
->auth_flavours
= compat_ptr(raw
->auth_flavours
);
790 real
->auth_flavourlen
= raw
->auth_flavourlen
;
791 real
->proto
= raw
->proto
;
792 real
->host_addr
= compat_ptr(raw
->host_addr
);
793 real
->host_addrlen
= raw
->host_addrlen
;
794 compat_nfs_string(&real
->hostname
, &raw
->hostname
);
795 compat_nfs_string(&real
->mnt_path
, &raw
->mnt_path
);
796 compat_nfs_string(&real
->client_addr
, &raw
->client_addr
);
797 real
->acdirmax
= raw
->acdirmax
;
798 real
->acdirmin
= raw
->acdirmin
;
799 real
->acregmax
= raw
->acregmax
;
800 real
->acregmin
= raw
->acregmin
;
801 real
->retrans
= raw
->retrans
;
802 real
->timeo
= raw
->timeo
;
803 real
->wsize
= raw
->wsize
;
804 real
->rsize
= raw
->rsize
;
805 real
->flags
= raw
->flags
;
806 real
->version
= raw
->version
;
812 #define NCPFS_NAME "ncpfs"
813 #define NFS4_NAME "nfs4"
815 asmlinkage
long compat_sys_mount(const char __user
* dev_name
,
816 const char __user
* dir_name
,
817 const char __user
* type
, unsigned long flags
,
818 const void __user
* data
)
821 unsigned long data_page
;
826 retval
= copy_mount_string(type
, &kernel_type
);
830 dir_page
= getname(dir_name
);
831 retval
= PTR_ERR(dir_page
);
832 if (IS_ERR(dir_page
))
835 retval
= copy_mount_string(dev_name
, &kernel_dev
);
839 retval
= copy_mount_options(data
, &data_page
);
845 if (kernel_type
&& data_page
) {
846 if (!strcmp(kernel_type
, NCPFS_NAME
)) {
847 do_ncp_super_data_conv((void *)data_page
);
848 } else if (!strcmp(kernel_type
, NFS4_NAME
)) {
849 if (do_nfs4_super_data_conv((void *) data_page
))
854 retval
= do_mount(kernel_dev
, dir_page
, kernel_type
,
855 flags
, (void*)data_page
);
858 free_page(data_page
);
869 struct compat_old_linux_dirent
{
870 compat_ulong_t d_ino
;
871 compat_ulong_t d_offset
;
872 unsigned short d_namlen
;
876 struct compat_readdir_callback
{
877 struct compat_old_linux_dirent __user
*dirent
;
881 static int compat_fillonedir(void *__buf
, const char *name
, int namlen
,
882 loff_t offset
, u64 ino
, unsigned int d_type
)
884 struct compat_readdir_callback
*buf
= __buf
;
885 struct compat_old_linux_dirent __user
*dirent
;
886 compat_ulong_t d_ino
;
891 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
892 buf
->result
= -EOVERFLOW
;
896 dirent
= buf
->dirent
;
897 if (!access_ok(VERIFY_WRITE
, dirent
,
898 (unsigned long)(dirent
->d_name
+ namlen
+ 1) -
899 (unsigned long)dirent
))
901 if ( __put_user(d_ino
, &dirent
->d_ino
) ||
902 __put_user(offset
, &dirent
->d_offset
) ||
903 __put_user(namlen
, &dirent
->d_namlen
) ||
904 __copy_to_user(dirent
->d_name
, name
, namlen
) ||
905 __put_user(0, dirent
->d_name
+ namlen
))
909 buf
->result
= -EFAULT
;
913 asmlinkage
long compat_sys_old_readdir(unsigned int fd
,
914 struct compat_old_linux_dirent __user
*dirent
, unsigned int count
)
918 struct compat_readdir_callback buf
;
928 error
= vfs_readdir(file
, compat_fillonedir
, &buf
);
937 struct compat_linux_dirent
{
938 compat_ulong_t d_ino
;
939 compat_ulong_t d_off
;
940 unsigned short d_reclen
;
944 struct compat_getdents_callback
{
945 struct compat_linux_dirent __user
*current_dir
;
946 struct compat_linux_dirent __user
*previous
;
951 static int compat_filldir(void *__buf
, const char *name
, int namlen
,
952 loff_t offset
, u64 ino
, unsigned int d_type
)
954 struct compat_linux_dirent __user
* dirent
;
955 struct compat_getdents_callback
*buf
= __buf
;
956 compat_ulong_t d_ino
;
957 int reclen
= ALIGN(offsetof(struct compat_linux_dirent
, d_name
) +
958 namlen
+ 2, sizeof(compat_long_t
));
960 buf
->error
= -EINVAL
; /* only used if we fail.. */
961 if (reclen
> buf
->count
)
964 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
965 buf
->error
= -EOVERFLOW
;
968 dirent
= buf
->previous
;
970 if (__put_user(offset
, &dirent
->d_off
))
973 dirent
= buf
->current_dir
;
974 if (__put_user(d_ino
, &dirent
->d_ino
))
976 if (__put_user(reclen
, &dirent
->d_reclen
))
978 if (copy_to_user(dirent
->d_name
, name
, namlen
))
980 if (__put_user(0, dirent
->d_name
+ namlen
))
982 if (__put_user(d_type
, (char __user
*) dirent
+ reclen
- 1))
984 buf
->previous
= dirent
;
985 dirent
= (void __user
*)dirent
+ reclen
;
986 buf
->current_dir
= dirent
;
987 buf
->count
-= reclen
;
990 buf
->error
= -EFAULT
;
994 asmlinkage
long compat_sys_getdents(unsigned int fd
,
995 struct compat_linux_dirent __user
*dirent
, unsigned int count
)
998 struct compat_linux_dirent __user
* lastdirent
;
999 struct compat_getdents_callback buf
;
1003 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
1011 buf
.current_dir
= dirent
;
1012 buf
.previous
= NULL
;
1016 error
= vfs_readdir(file
, compat_filldir
, &buf
);
1019 lastdirent
= buf
.previous
;
1021 if (put_user(file
->f_pos
, &lastdirent
->d_off
))
1024 error
= count
- buf
.count
;
1031 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1033 struct compat_getdents_callback64
{
1034 struct linux_dirent64 __user
*current_dir
;
1035 struct linux_dirent64 __user
*previous
;
1040 static int compat_filldir64(void * __buf
, const char * name
, int namlen
, loff_t offset
,
1041 u64 ino
, unsigned int d_type
)
1043 struct linux_dirent64 __user
*dirent
;
1044 struct compat_getdents_callback64
*buf
= __buf
;
1045 int reclen
= ALIGN(offsetof(struct linux_dirent64
, d_name
) + namlen
+ 1,
1049 buf
->error
= -EINVAL
; /* only used if we fail.. */
1050 if (reclen
> buf
->count
)
1052 dirent
= buf
->previous
;
1055 if (__put_user_unaligned(offset
, &dirent
->d_off
))
1058 dirent
= buf
->current_dir
;
1059 if (__put_user_unaligned(ino
, &dirent
->d_ino
))
1062 if (__put_user_unaligned(off
, &dirent
->d_off
))
1064 if (__put_user(reclen
, &dirent
->d_reclen
))
1066 if (__put_user(d_type
, &dirent
->d_type
))
1068 if (copy_to_user(dirent
->d_name
, name
, namlen
))
1070 if (__put_user(0, dirent
->d_name
+ namlen
))
1072 buf
->previous
= dirent
;
1073 dirent
= (void __user
*)dirent
+ reclen
;
1074 buf
->current_dir
= dirent
;
1075 buf
->count
-= reclen
;
1078 buf
->error
= -EFAULT
;
1082 asmlinkage
long compat_sys_getdents64(unsigned int fd
,
1083 struct linux_dirent64 __user
* dirent
, unsigned int count
)
1086 struct linux_dirent64 __user
* lastdirent
;
1087 struct compat_getdents_callback64 buf
;
1091 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
1099 buf
.current_dir
= dirent
;
1100 buf
.previous
= NULL
;
1104 error
= vfs_readdir(file
, compat_filldir64
, &buf
);
1107 lastdirent
= buf
.previous
;
1109 typeof(lastdirent
->d_off
) d_off
= file
->f_pos
;
1110 if (__put_user_unaligned(d_off
, &lastdirent
->d_off
))
1113 error
= count
- buf
.count
;
1119 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1121 static ssize_t
compat_do_readv_writev(int type
, struct file
*file
,
1122 const struct compat_iovec __user
*uvector
,
1123 unsigned long nr_segs
, loff_t
*pos
)
1125 compat_ssize_t tot_len
;
1126 struct iovec iovstack
[UIO_FASTIOV
];
1137 if (!access_ok(VERIFY_READ
, uvector
, nr_segs
*sizeof(*uvector
)))
1140 tot_len
= compat_rw_copy_check_uvector(type
, uvector
, nr_segs
,
1141 UIO_FASTIOV
, iovstack
, &iov
);
1147 ret
= rw_verify_area(type
, file
, pos
, tot_len
);
1153 fn
= file
->f_op
->read
;
1154 fnv
= file
->f_op
->aio_read
;
1156 fn
= (io_fn_t
)file
->f_op
->write
;
1157 fnv
= file
->f_op
->aio_write
;
1161 ret
= do_sync_readv_writev(file
, iov
, nr_segs
, tot_len
,
1164 ret
= do_loop_readv_writev(file
, iov
, nr_segs
, pos
, fn
);
1167 if (iov
!= iovstack
)
1169 if ((ret
+ (type
== READ
)) > 0) {
1171 fsnotify_access(file
);
1173 fsnotify_modify(file
);
1178 static size_t compat_readv(struct file
*file
,
1179 const struct compat_iovec __user
*vec
,
1180 unsigned long vlen
, loff_t
*pos
)
1182 ssize_t ret
= -EBADF
;
1184 if (!(file
->f_mode
& FMODE_READ
))
1188 if (!file
->f_op
|| (!file
->f_op
->aio_read
&& !file
->f_op
->read
))
1191 ret
= compat_do_readv_writev(READ
, file
, vec
, vlen
, pos
);
1195 add_rchar(current
, ret
);
1201 compat_sys_readv(unsigned long fd
, const struct compat_iovec __user
*vec
,
1208 file
= fget_light(fd
, &fput_needed
);
1211 ret
= compat_readv(file
, vec
, vlen
, &file
->f_pos
);
1212 fput_light(file
, fput_needed
);
1217 compat_sys_preadv(unsigned long fd
, const struct compat_iovec __user
*vec
,
1218 unsigned long vlen
, u32 pos_low
, u32 pos_high
)
1220 loff_t pos
= ((loff_t
)pos_high
<< 32) | pos_low
;
1227 file
= fget_light(fd
, &fput_needed
);
1230 ret
= compat_readv(file
, vec
, vlen
, &pos
);
1231 fput_light(file
, fput_needed
);
1235 static size_t compat_writev(struct file
*file
,
1236 const struct compat_iovec __user
*vec
,
1237 unsigned long vlen
, loff_t
*pos
)
1239 ssize_t ret
= -EBADF
;
1241 if (!(file
->f_mode
& FMODE_WRITE
))
1245 if (!file
->f_op
|| (!file
->f_op
->aio_write
&& !file
->f_op
->write
))
1248 ret
= compat_do_readv_writev(WRITE
, file
, vec
, vlen
, pos
);
1252 add_wchar(current
, ret
);
1258 compat_sys_writev(unsigned long fd
, const struct compat_iovec __user
*vec
,
1265 file
= fget_light(fd
, &fput_needed
);
1268 ret
= compat_writev(file
, vec
, vlen
, &file
->f_pos
);
1269 fput_light(file
, fput_needed
);
1274 compat_sys_pwritev(unsigned long fd
, const struct compat_iovec __user
*vec
,
1275 unsigned long vlen
, u32 pos_low
, u32 pos_high
)
1277 loff_t pos
= ((loff_t
)pos_high
<< 32) | pos_low
;
1284 file
= fget_light(fd
, &fput_needed
);
1287 ret
= compat_writev(file
, vec
, vlen
, &pos
);
1288 fput_light(file
, fput_needed
);
1293 compat_sys_vmsplice(int fd
, const struct compat_iovec __user
*iov32
,
1294 unsigned int nr_segs
, unsigned int flags
)
1297 struct iovec __user
*iov
;
1298 if (nr_segs
> UIO_MAXIOV
)
1300 iov
= compat_alloc_user_space(nr_segs
* sizeof(struct iovec
));
1301 for (i
= 0; i
< nr_segs
; i
++) {
1302 struct compat_iovec v
;
1303 if (get_user(v
.iov_base
, &iov32
[i
].iov_base
) ||
1304 get_user(v
.iov_len
, &iov32
[i
].iov_len
) ||
1305 put_user(compat_ptr(v
.iov_base
), &iov
[i
].iov_base
) ||
1306 put_user(v
.iov_len
, &iov
[i
].iov_len
))
1309 return sys_vmsplice(fd
, iov
, nr_segs
, flags
);
1313 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1317 compat_sys_open(const char __user
*filename
, int flags
, int mode
)
1319 return do_sys_open(AT_FDCWD
, filename
, flags
, mode
);
1323 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1327 compat_sys_openat(unsigned int dfd
, const char __user
*filename
, int flags
, int mode
)
1329 return do_sys_open(dfd
, filename
, flags
, mode
);
1333 * compat_count() counts the number of arguments/envelopes. It is basically
1334 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1335 * and envp pointers.
1337 static int compat_count(compat_uptr_t __user
*argv
, int max
)
1345 if (get_user(p
, argv
))
1358 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1359 * except that it works with 32 bit argv and envp pointers.
1361 static int compat_copy_strings(int argc
, compat_uptr_t __user
*argv
,
1362 struct linux_binprm
*bprm
)
1364 struct page
*kmapped_page
= NULL
;
1366 unsigned long kpos
= 0;
1369 while (argc
-- > 0) {
1374 if (get_user(str
, argv
+argc
) ||
1375 !(len
= strnlen_user(compat_ptr(str
), MAX_ARG_STRLEN
))) {
1380 if (len
> MAX_ARG_STRLEN
) {
1385 /* We're going to work our way backwords. */
1391 int offset
, bytes_to_copy
;
1393 offset
= pos
% PAGE_SIZE
;
1397 bytes_to_copy
= offset
;
1398 if (bytes_to_copy
> len
)
1399 bytes_to_copy
= len
;
1401 offset
-= bytes_to_copy
;
1402 pos
-= bytes_to_copy
;
1403 str
-= bytes_to_copy
;
1404 len
-= bytes_to_copy
;
1406 if (!kmapped_page
|| kpos
!= (pos
& PAGE_MASK
)) {
1409 #ifdef CONFIG_STACK_GROWSUP
1410 ret
= expand_stack_downwards(bprm
->vma
, pos
);
1412 /* We've exceed the stack rlimit. */
1417 ret
= get_user_pages(current
, bprm
->mm
, pos
,
1418 1, 1, 1, &page
, NULL
);
1420 /* We've exceed the stack rlimit. */
1426 flush_kernel_dcache_page(kmapped_page
);
1427 kunmap(kmapped_page
);
1428 put_page(kmapped_page
);
1430 kmapped_page
= page
;
1431 kaddr
= kmap(kmapped_page
);
1432 kpos
= pos
& PAGE_MASK
;
1433 flush_cache_page(bprm
->vma
, kpos
,
1434 page_to_pfn(kmapped_page
));
1436 if (copy_from_user(kaddr
+offset
, compat_ptr(str
),
1446 flush_kernel_dcache_page(kmapped_page
);
1447 kunmap(kmapped_page
);
1448 put_page(kmapped_page
);
1454 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1455 * that it processes 32 bit argv and envp pointers.
1457 int compat_do_execve(char * filename
,
1458 compat_uptr_t __user
*argv
,
1459 compat_uptr_t __user
*envp
,
1460 struct pt_regs
* regs
)
1462 struct linux_binprm
*bprm
;
1464 struct files_struct
*displaced
;
1468 retval
= unshare_files(&displaced
);
1473 bprm
= kzalloc(sizeof(*bprm
), GFP_KERNEL
);
1477 retval
= prepare_bprm_creds(bprm
);
1481 retval
= check_unsafe_exec(bprm
);
1484 clear_in_exec
= retval
;
1485 current
->in_execve
= 1;
1487 file
= open_exec(filename
);
1488 retval
= PTR_ERR(file
);
1495 bprm
->filename
= filename
;
1496 bprm
->interp
= filename
;
1498 retval
= bprm_mm_init(bprm
);
1502 bprm
->argc
= compat_count(argv
, MAX_ARG_STRINGS
);
1503 if ((retval
= bprm
->argc
) < 0)
1506 bprm
->envc
= compat_count(envp
, MAX_ARG_STRINGS
);
1507 if ((retval
= bprm
->envc
) < 0)
1510 retval
= prepare_binprm(bprm
);
1514 retval
= copy_strings_kernel(1, &bprm
->filename
, bprm
);
1518 bprm
->exec
= bprm
->p
;
1519 retval
= compat_copy_strings(bprm
->envc
, envp
, bprm
);
1523 retval
= compat_copy_strings(bprm
->argc
, argv
, bprm
);
1527 retval
= search_binary_handler(bprm
, regs
);
1531 /* execve succeeded */
1532 current
->fs
->in_exec
= 0;
1533 current
->in_execve
= 0;
1534 acct_update_integrals(current
);
1537 put_files_struct(displaced
);
1546 allow_write_access(bprm
->file
);
1552 current
->fs
->in_exec
= 0;
1553 current
->in_execve
= 0;
1560 reset_files_struct(displaced
);
1565 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1567 static int poll_select_copy_remaining(struct timespec
*end_time
, void __user
*p
,
1568 int timeval
, int ret
)
1575 if (current
->personality
& STICKY_TIMEOUTS
)
1578 /* No update for zero timeout */
1579 if (!end_time
->tv_sec
&& !end_time
->tv_nsec
)
1583 ts
= timespec_sub(*end_time
, ts
);
1585 ts
.tv_sec
= ts
.tv_nsec
= 0;
1588 struct compat_timeval rtv
;
1590 rtv
.tv_sec
= ts
.tv_sec
;
1591 rtv
.tv_usec
= ts
.tv_nsec
/ NSEC_PER_USEC
;
1593 if (!copy_to_user(p
, &rtv
, sizeof(rtv
)))
1596 struct compat_timespec rts
;
1598 rts
.tv_sec
= ts
.tv_sec
;
1599 rts
.tv_nsec
= ts
.tv_nsec
;
1601 if (!copy_to_user(p
, &rts
, sizeof(rts
)))
1605 * If an application puts its timeval in read-only memory, we
1606 * don't want the Linux-specific update to the timeval to
1607 * cause a fault after the select has completed
1608 * successfully. However, because we're not updating the
1609 * timeval, we can't restart the system call.
1613 if (ret
== -ERESTARTNOHAND
)
1619 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1620 * 64-bit unsigned longs.
1623 int compat_get_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1624 unsigned long *fdset
)
1626 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1630 if (!access_ok(VERIFY_WRITE
, ufdset
, nr
*sizeof(compat_ulong_t
)))
1637 if (__get_user(l
, ufdset
) || __get_user(h
, ufdset
+1))
1640 *fdset
++ = h
<< 32 | l
;
1643 if (odd
&& __get_user(*fdset
, ufdset
))
1646 /* Tricky, must clear full unsigned long in the
1647 * kernel fdset at the end, this makes sure that
1650 memset(fdset
, 0, ((nr
+ 1) & ~1)*sizeof(compat_ulong_t
));
1656 int compat_set_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1657 unsigned long *fdset
)
1660 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1671 if (__put_user(l
, ufdset
) || __put_user(h
, ufdset
+1))
1676 if (odd
&& __put_user(*fdset
, ufdset
))
1683 * This is a virtual copy of sys_select from fs/select.c and probably
1684 * should be compared to it from time to time
1688 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1689 * like to be certain this leads to no problems. So I return
1690 * EINTR just for safety.
1692 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1693 * I'm trying ERESTARTNOHAND which restart only when you want to.
1695 #define MAX_SELECT_SECONDS \
1696 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1698 int compat_core_sys_select(int n
, compat_ulong_t __user
*inp
,
1699 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1700 struct timespec
*end_time
)
1704 int size
, max_fds
, ret
= -EINVAL
;
1705 struct fdtable
*fdt
;
1706 long stack_fds
[SELECT_STACK_ALLOC
/sizeof(long)];
1711 /* max_fds can increase, so grab it once to avoid race */
1713 fdt
= files_fdtable(current
->files
);
1714 max_fds
= fdt
->max_fds
;
1720 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1721 * since we used fdset we need to allocate memory in units of
1724 size
= FDS_BYTES(n
);
1726 if (size
> sizeof(stack_fds
) / 6) {
1727 bits
= kmalloc(6 * size
, GFP_KERNEL
);
1732 fds
.in
= (unsigned long *) bits
;
1733 fds
.out
= (unsigned long *) (bits
+ size
);
1734 fds
.ex
= (unsigned long *) (bits
+ 2*size
);
1735 fds
.res_in
= (unsigned long *) (bits
+ 3*size
);
1736 fds
.res_out
= (unsigned long *) (bits
+ 4*size
);
1737 fds
.res_ex
= (unsigned long *) (bits
+ 5*size
);
1739 if ((ret
= compat_get_fd_set(n
, inp
, fds
.in
)) ||
1740 (ret
= compat_get_fd_set(n
, outp
, fds
.out
)) ||
1741 (ret
= compat_get_fd_set(n
, exp
, fds
.ex
)))
1743 zero_fd_set(n
, fds
.res_in
);
1744 zero_fd_set(n
, fds
.res_out
);
1745 zero_fd_set(n
, fds
.res_ex
);
1747 ret
= do_select(n
, &fds
, end_time
);
1752 ret
= -ERESTARTNOHAND
;
1753 if (signal_pending(current
))
1758 if (compat_set_fd_set(n
, inp
, fds
.res_in
) ||
1759 compat_set_fd_set(n
, outp
, fds
.res_out
) ||
1760 compat_set_fd_set(n
, exp
, fds
.res_ex
))
1763 if (bits
!= stack_fds
)
1769 asmlinkage
long compat_sys_select(int n
, compat_ulong_t __user
*inp
,
1770 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1771 struct compat_timeval __user
*tvp
)
1773 struct timespec end_time
, *to
= NULL
;
1774 struct compat_timeval tv
;
1778 if (copy_from_user(&tv
, tvp
, sizeof(tv
)))
1782 if (poll_select_set_timeout(to
,
1783 tv
.tv_sec
+ (tv
.tv_usec
/ USEC_PER_SEC
),
1784 (tv
.tv_usec
% USEC_PER_SEC
) * NSEC_PER_USEC
))
1788 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1789 ret
= poll_select_copy_remaining(&end_time
, tvp
, 1, ret
);
1794 struct compat_sel_arg_struct
{
1802 asmlinkage
long compat_sys_old_select(struct compat_sel_arg_struct __user
*arg
)
1804 struct compat_sel_arg_struct a
;
1806 if (copy_from_user(&a
, arg
, sizeof(a
)))
1808 return compat_sys_select(a
.n
, compat_ptr(a
.inp
), compat_ptr(a
.outp
),
1809 compat_ptr(a
.exp
), compat_ptr(a
.tvp
));
1812 #ifdef HAVE_SET_RESTORE_SIGMASK
1813 static long do_compat_pselect(int n
, compat_ulong_t __user
*inp
,
1814 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1815 struct compat_timespec __user
*tsp
, compat_sigset_t __user
*sigmask
,
1816 compat_size_t sigsetsize
)
1818 compat_sigset_t ss32
;
1819 sigset_t ksigmask
, sigsaved
;
1820 struct compat_timespec ts
;
1821 struct timespec end_time
, *to
= NULL
;
1825 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1829 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1834 if (sigsetsize
!= sizeof(compat_sigset_t
))
1836 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1838 sigset_from_compat(&ksigmask
, &ss32
);
1840 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1841 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1844 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1845 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1847 if (ret
== -ERESTARTNOHAND
) {
1849 * Don't restore the signal mask yet. Let do_signal() deliver
1850 * the signal on the way back to userspace, before the signal
1854 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1856 set_restore_sigmask();
1859 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1864 asmlinkage
long compat_sys_pselect6(int n
, compat_ulong_t __user
*inp
,
1865 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1866 struct compat_timespec __user
*tsp
, void __user
*sig
)
1868 compat_size_t sigsetsize
= 0;
1869 compat_uptr_t up
= 0;
1872 if (!access_ok(VERIFY_READ
, sig
,
1873 sizeof(compat_uptr_t
)+sizeof(compat_size_t
)) ||
1874 __get_user(up
, (compat_uptr_t __user
*)sig
) ||
1875 __get_user(sigsetsize
,
1876 (compat_size_t __user
*)(sig
+sizeof(up
))))
1879 return do_compat_pselect(n
, inp
, outp
, exp
, tsp
, compat_ptr(up
),
1883 asmlinkage
long compat_sys_ppoll(struct pollfd __user
*ufds
,
1884 unsigned int nfds
, struct compat_timespec __user
*tsp
,
1885 const compat_sigset_t __user
*sigmask
, compat_size_t sigsetsize
)
1887 compat_sigset_t ss32
;
1888 sigset_t ksigmask
, sigsaved
;
1889 struct compat_timespec ts
;
1890 struct timespec end_time
, *to
= NULL
;
1894 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1898 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1903 if (sigsetsize
!= sizeof(compat_sigset_t
))
1905 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1907 sigset_from_compat(&ksigmask
, &ss32
);
1909 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1910 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1913 ret
= do_sys_poll(ufds
, nfds
, to
);
1915 /* We can restart this syscall, usually */
1916 if (ret
== -EINTR
) {
1918 * Don't restore the signal mask yet. Let do_signal() deliver
1919 * the signal on the way back to userspace, before the signal
1923 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1925 set_restore_sigmask();
1927 ret
= -ERESTARTNOHAND
;
1929 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1931 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1935 #endif /* HAVE_SET_RESTORE_SIGMASK */
1937 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1938 /* Stuff for NFS server syscalls... */
1939 struct compat_nfsctl_svc
{
1944 struct compat_nfsctl_client
{
1945 s8 cl32_ident
[NFSCLNT_IDMAX
+1];
1947 struct in_addr cl32_addrlist
[NFSCLNT_ADDRMAX
];
1950 u8 cl32_fhkey
[NFSCLNT_KEYMAX
];
1953 struct compat_nfsctl_export
{
1954 char ex32_client
[NFSCLNT_IDMAX
+1];
1955 char ex32_path
[NFS_MAXPATHLEN
+1];
1956 compat_dev_t ex32_dev
;
1957 compat_ino_t ex32_ino
;
1958 compat_int_t ex32_flags
;
1959 __compat_uid_t ex32_anon_uid
;
1960 __compat_gid_t ex32_anon_gid
;
1963 struct compat_nfsctl_fdparm
{
1964 struct sockaddr gd32_addr
;
1965 s8 gd32_path
[NFS_MAXPATHLEN
+1];
1966 compat_int_t gd32_version
;
1969 struct compat_nfsctl_fsparm
{
1970 struct sockaddr gd32_addr
;
1971 s8 gd32_path
[NFS_MAXPATHLEN
+1];
1972 compat_int_t gd32_maxlen
;
1975 struct compat_nfsctl_arg
{
1976 compat_int_t ca32_version
; /* safeguard */
1978 struct compat_nfsctl_svc u32_svc
;
1979 struct compat_nfsctl_client u32_client
;
1980 struct compat_nfsctl_export u32_export
;
1981 struct compat_nfsctl_fdparm u32_getfd
;
1982 struct compat_nfsctl_fsparm u32_getfs
;
1984 #define ca32_svc u.u32_svc
1985 #define ca32_client u.u32_client
1986 #define ca32_export u.u32_export
1987 #define ca32_getfd u.u32_getfd
1988 #define ca32_getfs u.u32_getfs
1991 union compat_nfsctl_res
{
1992 __u8 cr32_getfh
[NFS_FHSIZE
];
1993 struct knfsd_fh cr32_getfs
;
1996 static int compat_nfs_svc_trans(struct nfsctl_arg
*karg
,
1997 struct compat_nfsctl_arg __user
*arg
)
1999 if (!access_ok(VERIFY_READ
, &arg
->ca32_svc
, sizeof(arg
->ca32_svc
)) ||
2000 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2001 __get_user(karg
->ca_svc
.svc_port
, &arg
->ca32_svc
.svc32_port
) ||
2002 __get_user(karg
->ca_svc
.svc_nthreads
,
2003 &arg
->ca32_svc
.svc32_nthreads
))
2008 static int compat_nfs_clnt_trans(struct nfsctl_arg
*karg
,
2009 struct compat_nfsctl_arg __user
*arg
)
2011 if (!access_ok(VERIFY_READ
, &arg
->ca32_client
,
2012 sizeof(arg
->ca32_client
)) ||
2013 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2014 __copy_from_user(&karg
->ca_client
.cl_ident
[0],
2015 &arg
->ca32_client
.cl32_ident
[0],
2017 __get_user(karg
->ca_client
.cl_naddr
,
2018 &arg
->ca32_client
.cl32_naddr
) ||
2019 __copy_from_user(&karg
->ca_client
.cl_addrlist
[0],
2020 &arg
->ca32_client
.cl32_addrlist
[0],
2021 (sizeof(struct in_addr
) * NFSCLNT_ADDRMAX
)) ||
2022 __get_user(karg
->ca_client
.cl_fhkeytype
,
2023 &arg
->ca32_client
.cl32_fhkeytype
) ||
2024 __get_user(karg
->ca_client
.cl_fhkeylen
,
2025 &arg
->ca32_client
.cl32_fhkeylen
) ||
2026 __copy_from_user(&karg
->ca_client
.cl_fhkey
[0],
2027 &arg
->ca32_client
.cl32_fhkey
[0],
2034 static int compat_nfs_exp_trans(struct nfsctl_arg
*karg
,
2035 struct compat_nfsctl_arg __user
*arg
)
2037 if (!access_ok(VERIFY_READ
, &arg
->ca32_export
,
2038 sizeof(arg
->ca32_export
)) ||
2039 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2040 __copy_from_user(&karg
->ca_export
.ex_client
[0],
2041 &arg
->ca32_export
.ex32_client
[0],
2043 __copy_from_user(&karg
->ca_export
.ex_path
[0],
2044 &arg
->ca32_export
.ex32_path
[0],
2046 __get_user(karg
->ca_export
.ex_dev
,
2047 &arg
->ca32_export
.ex32_dev
) ||
2048 __get_user(karg
->ca_export
.ex_ino
,
2049 &arg
->ca32_export
.ex32_ino
) ||
2050 __get_user(karg
->ca_export
.ex_flags
,
2051 &arg
->ca32_export
.ex32_flags
) ||
2052 __get_user(karg
->ca_export
.ex_anon_uid
,
2053 &arg
->ca32_export
.ex32_anon_uid
) ||
2054 __get_user(karg
->ca_export
.ex_anon_gid
,
2055 &arg
->ca32_export
.ex32_anon_gid
))
2057 SET_UID(karg
->ca_export
.ex_anon_uid
, karg
->ca_export
.ex_anon_uid
);
2058 SET_GID(karg
->ca_export
.ex_anon_gid
, karg
->ca_export
.ex_anon_gid
);
2063 static int compat_nfs_getfd_trans(struct nfsctl_arg
*karg
,
2064 struct compat_nfsctl_arg __user
*arg
)
2066 if (!access_ok(VERIFY_READ
, &arg
->ca32_getfd
,
2067 sizeof(arg
->ca32_getfd
)) ||
2068 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2069 __copy_from_user(&karg
->ca_getfd
.gd_addr
,
2070 &arg
->ca32_getfd
.gd32_addr
,
2071 (sizeof(struct sockaddr
))) ||
2072 __copy_from_user(&karg
->ca_getfd
.gd_path
,
2073 &arg
->ca32_getfd
.gd32_path
,
2074 (NFS_MAXPATHLEN
+1)) ||
2075 __get_user(karg
->ca_getfd
.gd_version
,
2076 &arg
->ca32_getfd
.gd32_version
))
2082 static int compat_nfs_getfs_trans(struct nfsctl_arg
*karg
,
2083 struct compat_nfsctl_arg __user
*arg
)
2085 if (!access_ok(VERIFY_READ
,&arg
->ca32_getfs
,sizeof(arg
->ca32_getfs
)) ||
2086 get_user(karg
->ca_version
, &arg
->ca32_version
) ||
2087 __copy_from_user(&karg
->ca_getfs
.gd_addr
,
2088 &arg
->ca32_getfs
.gd32_addr
,
2089 (sizeof(struct sockaddr
))) ||
2090 __copy_from_user(&karg
->ca_getfs
.gd_path
,
2091 &arg
->ca32_getfs
.gd32_path
,
2092 (NFS_MAXPATHLEN
+1)) ||
2093 __get_user(karg
->ca_getfs
.gd_maxlen
,
2094 &arg
->ca32_getfs
.gd32_maxlen
))
2100 /* This really doesn't need translations, we are only passing
2101 * back a union which contains opaque nfs file handle data.
2103 static int compat_nfs_getfh_res_trans(union nfsctl_res
*kres
,
2104 union compat_nfsctl_res __user
*res
)
2108 err
= copy_to_user(res
, kres
, sizeof(*res
));
2110 return (err
) ? -EFAULT
: 0;
2113 asmlinkage
long compat_sys_nfsservctl(int cmd
,
2114 struct compat_nfsctl_arg __user
*arg
,
2115 union compat_nfsctl_res __user
*res
)
2117 struct nfsctl_arg
*karg
;
2118 union nfsctl_res
*kres
;
2122 karg
= kmalloc(sizeof(*karg
), GFP_USER
);
2123 kres
= kmalloc(sizeof(*kres
), GFP_USER
);
2124 if(!karg
|| !kres
) {
2131 err
= compat_nfs_svc_trans(karg
, arg
);
2134 case NFSCTL_ADDCLIENT
:
2135 err
= compat_nfs_clnt_trans(karg
, arg
);
2138 case NFSCTL_DELCLIENT
:
2139 err
= compat_nfs_clnt_trans(karg
, arg
);
2143 case NFSCTL_UNEXPORT
:
2144 err
= compat_nfs_exp_trans(karg
, arg
);
2148 err
= compat_nfs_getfd_trans(karg
, arg
);
2152 err
= compat_nfs_getfs_trans(karg
, arg
);
2165 /* The __user pointer casts are valid because of the set_fs() */
2166 err
= sys_nfsservctl(cmd
, (void __user
*) karg
, (void __user
*) kres
);
2172 if((cmd
== NFSCTL_GETFD
) ||
2173 (cmd
== NFSCTL_GETFS
))
2174 err
= compat_nfs_getfh_res_trans(kres
, res
);
2182 long asmlinkage
compat_sys_nfsservctl(int cmd
, void *notused
, void *notused2
)
2184 return sys_ni_syscall();
2190 #ifdef HAVE_SET_RESTORE_SIGMASK
2191 asmlinkage
long compat_sys_epoll_pwait(int epfd
,
2192 struct compat_epoll_event __user
*events
,
2193 int maxevents
, int timeout
,
2194 const compat_sigset_t __user
*sigmask
,
2195 compat_size_t sigsetsize
)
2198 compat_sigset_t csigmask
;
2199 sigset_t ksigmask
, sigsaved
;
2202 * If the caller wants a certain signal mask to be set during the wait,
2206 if (sigsetsize
!= sizeof(compat_sigset_t
))
2208 if (copy_from_user(&csigmask
, sigmask
, sizeof(csigmask
)))
2210 sigset_from_compat(&ksigmask
, &csigmask
);
2211 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
) | sigmask(SIGSTOP
));
2212 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
2215 err
= sys_epoll_wait(epfd
, events
, maxevents
, timeout
);
2218 * If we changed the signal mask, we need to restore the original one.
2219 * In case we've got a signal while waiting, we do not restore the
2220 * signal mask yet, and we allow do_signal() to deliver the signal on
2221 * the way back to userspace, before the signal mask is restored.
2224 if (err
== -EINTR
) {
2225 memcpy(¤t
->saved_sigmask
, &sigsaved
,
2227 set_restore_sigmask();
2229 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
2234 #endif /* HAVE_SET_RESTORE_SIGMASK */
2236 #endif /* CONFIG_EPOLL */
2238 #ifdef CONFIG_SIGNALFD
2240 asmlinkage
long compat_sys_signalfd4(int ufd
,
2241 const compat_sigset_t __user
*sigmask
,
2242 compat_size_t sigsetsize
, int flags
)
2244 compat_sigset_t ss32
;
2246 sigset_t __user
*ksigmask
;
2248 if (sigsetsize
!= sizeof(compat_sigset_t
))
2250 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
2252 sigset_from_compat(&tmp
, &ss32
);
2253 ksigmask
= compat_alloc_user_space(sizeof(sigset_t
));
2254 if (copy_to_user(ksigmask
, &tmp
, sizeof(sigset_t
)))
2257 return sys_signalfd4(ufd
, ksigmask
, sizeof(sigset_t
), flags
);
2260 asmlinkage
long compat_sys_signalfd(int ufd
,
2261 const compat_sigset_t __user
*sigmask
,
2262 compat_size_t sigsetsize
)
2264 return compat_sys_signalfd4(ufd
, sigmask
, sigsetsize
, 0);
2266 #endif /* CONFIG_SIGNALFD */
2268 #ifdef CONFIG_TIMERFD
2270 asmlinkage
long compat_sys_timerfd_settime(int ufd
, int flags
,
2271 const struct compat_itimerspec __user
*utmr
,
2272 struct compat_itimerspec __user
*otmr
)
2275 struct itimerspec t
;
2276 struct itimerspec __user
*ut
;
2278 if (get_compat_itimerspec(&t
, utmr
))
2280 ut
= compat_alloc_user_space(2 * sizeof(struct itimerspec
));
2281 if (copy_to_user(&ut
[0], &t
, sizeof(t
)))
2283 error
= sys_timerfd_settime(ufd
, flags
, &ut
[0], &ut
[1]);
2285 error
= (copy_from_user(&t
, &ut
[1], sizeof(struct itimerspec
)) ||
2286 put_compat_itimerspec(otmr
, &t
)) ? -EFAULT
: 0;
2291 asmlinkage
long compat_sys_timerfd_gettime(int ufd
,
2292 struct compat_itimerspec __user
*otmr
)
2295 struct itimerspec t
;
2296 struct itimerspec __user
*ut
;
2298 ut
= compat_alloc_user_space(sizeof(struct itimerspec
));
2299 error
= sys_timerfd_gettime(ufd
, ut
);
2301 error
= (copy_from_user(&t
, ut
, sizeof(struct itimerspec
)) ||
2302 put_compat_itimerspec(otmr
, &t
)) ? -EFAULT
: 0;
2307 #endif /* CONFIG_TIMERFD */