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/dirent.h>
37 #include <linux/fsnotify.h>
38 #include <linux/highuid.h>
39 #include <linux/personality.h>
40 #include <linux/rwsem.h>
41 #include <linux/tsacct_kern.h>
42 #include <linux/security.h>
43 #include <linux/highmem.h>
44 #include <linux/signal.h>
45 #include <linux/poll.h>
47 #include <linux/fs_struct.h>
48 #include <linux/slab.h>
49 #include <linux/pagemap.h>
51 #include <asm/uaccess.h>
52 #include <asm/mmu_context.h>
53 #include <asm/ioctls.h>
58 int compat_printk(const char *fmt
, ...)
65 ret
= vprintk(fmt
, ap
);
71 * Not all architectures have sys_utime, so implement this in terms
74 asmlinkage
long compat_sys_utime(const char __user
*filename
,
75 struct compat_utimbuf __user
*t
)
77 struct timespec tv
[2];
80 if (get_user(tv
[0].tv_sec
, &t
->actime
) ||
81 get_user(tv
[1].tv_sec
, &t
->modtime
))
86 return do_utimes(AT_FDCWD
, filename
, t
? tv
: NULL
, 0);
89 asmlinkage
long compat_sys_utimensat(unsigned int dfd
, const char __user
*filename
, struct compat_timespec __user
*t
, int flags
)
91 struct timespec tv
[2];
94 if (get_compat_timespec(&tv
[0], &t
[0]) ||
95 get_compat_timespec(&tv
[1], &t
[1]))
98 if (tv
[0].tv_nsec
== UTIME_OMIT
&& tv
[1].tv_nsec
== UTIME_OMIT
)
101 return do_utimes(dfd
, filename
, t
? tv
: NULL
, flags
);
104 asmlinkage
long compat_sys_futimesat(unsigned int dfd
, const char __user
*filename
, struct compat_timeval __user
*t
)
106 struct timespec tv
[2];
109 if (get_user(tv
[0].tv_sec
, &t
[0].tv_sec
) ||
110 get_user(tv
[0].tv_nsec
, &t
[0].tv_usec
) ||
111 get_user(tv
[1].tv_sec
, &t
[1].tv_sec
) ||
112 get_user(tv
[1].tv_nsec
, &t
[1].tv_usec
))
114 if (tv
[0].tv_nsec
>= 1000000 || tv
[0].tv_nsec
< 0 ||
115 tv
[1].tv_nsec
>= 1000000 || tv
[1].tv_nsec
< 0)
117 tv
[0].tv_nsec
*= 1000;
118 tv
[1].tv_nsec
*= 1000;
120 return do_utimes(dfd
, filename
, t
? tv
: NULL
, 0);
123 asmlinkage
long compat_sys_utimes(const char __user
*filename
, struct compat_timeval __user
*t
)
125 return compat_sys_futimesat(AT_FDCWD
, filename
, t
);
128 static int cp_compat_stat(struct kstat
*stat
, struct compat_stat __user
*ubuf
)
130 struct compat_stat tmp
;
132 if (!old_valid_dev(stat
->dev
) || !old_valid_dev(stat
->rdev
))
135 memset(&tmp
, 0, sizeof(tmp
));
136 tmp
.st_dev
= old_encode_dev(stat
->dev
);
137 tmp
.st_ino
= stat
->ino
;
138 if (sizeof(tmp
.st_ino
) < sizeof(stat
->ino
) && tmp
.st_ino
!= stat
->ino
)
140 tmp
.st_mode
= stat
->mode
;
141 tmp
.st_nlink
= stat
->nlink
;
142 if (tmp
.st_nlink
!= stat
->nlink
)
144 SET_UID(tmp
.st_uid
, from_kuid_munged(current_user_ns(), stat
->uid
));
145 SET_GID(tmp
.st_gid
, from_kgid_munged(current_user_ns(), stat
->gid
));
146 tmp
.st_rdev
= old_encode_dev(stat
->rdev
);
147 if ((u64
) stat
->size
> MAX_NON_LFS
)
149 tmp
.st_size
= stat
->size
;
150 tmp
.st_atime
= stat
->atime
.tv_sec
;
151 tmp
.st_atime_nsec
= stat
->atime
.tv_nsec
;
152 tmp
.st_mtime
= stat
->mtime
.tv_sec
;
153 tmp
.st_mtime_nsec
= stat
->mtime
.tv_nsec
;
154 tmp
.st_ctime
= stat
->ctime
.tv_sec
;
155 tmp
.st_ctime_nsec
= stat
->ctime
.tv_nsec
;
156 tmp
.st_blocks
= stat
->blocks
;
157 tmp
.st_blksize
= stat
->blksize
;
158 return copy_to_user(ubuf
, &tmp
, sizeof(tmp
)) ? -EFAULT
: 0;
161 asmlinkage
long compat_sys_newstat(const char __user
* filename
,
162 struct compat_stat __user
*statbuf
)
167 error
= vfs_stat(filename
, &stat
);
170 return cp_compat_stat(&stat
, statbuf
);
173 asmlinkage
long compat_sys_newlstat(const char __user
* filename
,
174 struct compat_stat __user
*statbuf
)
179 error
= vfs_lstat(filename
, &stat
);
182 return cp_compat_stat(&stat
, statbuf
);
185 #ifndef __ARCH_WANT_STAT64
186 asmlinkage
long compat_sys_newfstatat(unsigned int dfd
,
187 const char __user
*filename
,
188 struct compat_stat __user
*statbuf
, int flag
)
193 error
= vfs_fstatat(dfd
, filename
, &stat
, flag
);
196 return cp_compat_stat(&stat
, statbuf
);
200 asmlinkage
long compat_sys_newfstat(unsigned int fd
,
201 struct compat_stat __user
* statbuf
)
204 int error
= vfs_fstat(fd
, &stat
);
207 error
= cp_compat_stat(&stat
, statbuf
);
211 static int put_compat_statfs(struct compat_statfs __user
*ubuf
, struct kstatfs
*kbuf
)
214 if (sizeof ubuf
->f_blocks
== 4) {
215 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
216 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
218 /* f_files and f_ffree may be -1; it's okay
219 * to stuff that into 32 bits */
220 if (kbuf
->f_files
!= 0xffffffffffffffffULL
221 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
223 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
224 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
227 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
228 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
229 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
230 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
231 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
232 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
233 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
234 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
235 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
236 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
237 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
238 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
) ||
239 __put_user(kbuf
->f_flags
, &ubuf
->f_flags
) ||
240 __clear_user(ubuf
->f_spare
, sizeof(ubuf
->f_spare
)))
246 * The following statfs calls are copies of code from fs/statfs.c and
247 * should be checked against those from time to time
249 asmlinkage
long compat_sys_statfs(const char __user
*pathname
, struct compat_statfs __user
*buf
)
252 int error
= user_statfs(pathname
, &tmp
);
254 error
= put_compat_statfs(buf
, &tmp
);
258 asmlinkage
long compat_sys_fstatfs(unsigned int fd
, struct compat_statfs __user
*buf
)
261 int error
= fd_statfs(fd
, &tmp
);
263 error
= put_compat_statfs(buf
, &tmp
);
267 static int put_compat_statfs64(struct compat_statfs64 __user
*ubuf
, struct kstatfs
*kbuf
)
269 if (sizeof ubuf
->f_blocks
== 4) {
270 if ((kbuf
->f_blocks
| kbuf
->f_bfree
| kbuf
->f_bavail
|
271 kbuf
->f_bsize
| kbuf
->f_frsize
) & 0xffffffff00000000ULL
)
273 /* f_files and f_ffree may be -1; it's okay
274 * to stuff that into 32 bits */
275 if (kbuf
->f_files
!= 0xffffffffffffffffULL
276 && (kbuf
->f_files
& 0xffffffff00000000ULL
))
278 if (kbuf
->f_ffree
!= 0xffffffffffffffffULL
279 && (kbuf
->f_ffree
& 0xffffffff00000000ULL
))
282 if (!access_ok(VERIFY_WRITE
, ubuf
, sizeof(*ubuf
)) ||
283 __put_user(kbuf
->f_type
, &ubuf
->f_type
) ||
284 __put_user(kbuf
->f_bsize
, &ubuf
->f_bsize
) ||
285 __put_user(kbuf
->f_blocks
, &ubuf
->f_blocks
) ||
286 __put_user(kbuf
->f_bfree
, &ubuf
->f_bfree
) ||
287 __put_user(kbuf
->f_bavail
, &ubuf
->f_bavail
) ||
288 __put_user(kbuf
->f_files
, &ubuf
->f_files
) ||
289 __put_user(kbuf
->f_ffree
, &ubuf
->f_ffree
) ||
290 __put_user(kbuf
->f_namelen
, &ubuf
->f_namelen
) ||
291 __put_user(kbuf
->f_fsid
.val
[0], &ubuf
->f_fsid
.val
[0]) ||
292 __put_user(kbuf
->f_fsid
.val
[1], &ubuf
->f_fsid
.val
[1]) ||
293 __put_user(kbuf
->f_frsize
, &ubuf
->f_frsize
) ||
294 __put_user(kbuf
->f_flags
, &ubuf
->f_flags
) ||
295 __clear_user(ubuf
->f_spare
, sizeof(ubuf
->f_spare
)))
300 asmlinkage
long compat_sys_statfs64(const char __user
*pathname
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
305 if (sz
!= sizeof(*buf
))
308 error
= user_statfs(pathname
, &tmp
);
310 error
= put_compat_statfs64(buf
, &tmp
);
314 asmlinkage
long compat_sys_fstatfs64(unsigned int fd
, compat_size_t sz
, struct compat_statfs64 __user
*buf
)
319 if (sz
!= sizeof(*buf
))
322 error
= fd_statfs(fd
, &tmp
);
324 error
= put_compat_statfs64(buf
, &tmp
);
329 * This is a copy of sys_ustat, just dealing with a structure layout.
330 * Given how simple this syscall is that apporach is more maintainable
331 * than the various conversion hacks.
333 asmlinkage
long compat_sys_ustat(unsigned dev
, struct compat_ustat __user
*u
)
335 struct compat_ustat tmp
;
337 int err
= vfs_ustat(new_decode_dev(dev
), &sbuf
);
341 memset(&tmp
, 0, sizeof(struct compat_ustat
));
342 tmp
.f_tfree
= sbuf
.f_bfree
;
343 tmp
.f_tinode
= sbuf
.f_ffree
;
344 if (copy_to_user(u
, &tmp
, sizeof(struct compat_ustat
)))
349 static int get_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
351 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
352 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
353 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
354 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
355 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
356 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
361 static int put_compat_flock(struct flock
*kfl
, struct compat_flock __user
*ufl
)
363 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
364 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
365 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
366 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
367 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
368 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
373 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
374 static int get_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
376 if (!access_ok(VERIFY_READ
, ufl
, sizeof(*ufl
)) ||
377 __get_user(kfl
->l_type
, &ufl
->l_type
) ||
378 __get_user(kfl
->l_whence
, &ufl
->l_whence
) ||
379 __get_user(kfl
->l_start
, &ufl
->l_start
) ||
380 __get_user(kfl
->l_len
, &ufl
->l_len
) ||
381 __get_user(kfl
->l_pid
, &ufl
->l_pid
))
387 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
388 static int put_compat_flock64(struct flock
*kfl
, struct compat_flock64 __user
*ufl
)
390 if (!access_ok(VERIFY_WRITE
, ufl
, sizeof(*ufl
)) ||
391 __put_user(kfl
->l_type
, &ufl
->l_type
) ||
392 __put_user(kfl
->l_whence
, &ufl
->l_whence
) ||
393 __put_user(kfl
->l_start
, &ufl
->l_start
) ||
394 __put_user(kfl
->l_len
, &ufl
->l_len
) ||
395 __put_user(kfl
->l_pid
, &ufl
->l_pid
))
401 asmlinkage
long compat_sys_fcntl64(unsigned int fd
, unsigned int cmd
,
412 ret
= get_compat_flock(&f
, compat_ptr(arg
));
417 ret
= sys_fcntl(fd
, cmd
, (unsigned long)&f
);
419 if (cmd
== F_GETLK
&& ret
== 0) {
420 /* GETLK was successful and we need to return the data...
421 * but it needs to fit in the compat structure.
422 * l_start shouldn't be too big, unless the original
423 * start + end is greater than COMPAT_OFF_T_MAX, in which
424 * case the app was asking for trouble, so we return
425 * -EOVERFLOW in that case.
426 * l_len could be too big, in which case we just truncate it,
427 * and only allow the app to see that part of the conflicting
428 * lock that might make sense to it anyway
431 if (f
.l_start
> COMPAT_OFF_T_MAX
)
433 if (f
.l_len
> COMPAT_OFF_T_MAX
)
434 f
.l_len
= COMPAT_OFF_T_MAX
;
436 ret
= put_compat_flock(&f
, compat_ptr(arg
));
443 ret
= get_compat_flock64(&f
, compat_ptr(arg
));
448 ret
= sys_fcntl(fd
, (cmd
== F_GETLK64
) ? F_GETLK
:
449 ((cmd
== F_SETLK64
) ? F_SETLK
: F_SETLKW
),
452 if (cmd
== F_GETLK64
&& ret
== 0) {
453 /* need to return lock information - see above for commentary */
454 if (f
.l_start
> COMPAT_LOFF_T_MAX
)
456 if (f
.l_len
> COMPAT_LOFF_T_MAX
)
457 f
.l_len
= COMPAT_LOFF_T_MAX
;
459 ret
= put_compat_flock64(&f
, compat_ptr(arg
));
464 ret
= sys_fcntl(fd
, cmd
, arg
);
470 asmlinkage
long compat_sys_fcntl(unsigned int fd
, unsigned int cmd
,
473 if ((cmd
== F_GETLK64
) || (cmd
== F_SETLK64
) || (cmd
== F_SETLKW64
))
475 return compat_sys_fcntl64(fd
, cmd
, arg
);
479 compat_sys_io_setup(unsigned nr_reqs
, u32 __user
*ctx32p
)
484 mm_segment_t oldfs
= get_fs();
485 if (unlikely(get_user(ctx64
, ctx32p
)))
489 /* The __user pointer cast is valid because of the set_fs() */
490 ret
= sys_io_setup(nr_reqs
, (aio_context_t __user
*) &ctx64
);
492 /* truncating is ok because it's a user address */
494 ret
= put_user((u32
) ctx64
, ctx32p
);
499 compat_sys_io_getevents(aio_context_t ctx_id
,
500 unsigned long min_nr
,
502 struct io_event __user
*events
,
503 struct compat_timespec __user
*timeout
)
507 struct timespec __user
*ut
= NULL
;
510 if (unlikely(!access_ok(VERIFY_WRITE
, events
,
511 nr
* sizeof(struct io_event
))))
514 if (get_compat_timespec(&t
, timeout
))
517 ut
= compat_alloc_user_space(sizeof(*ut
));
518 if (copy_to_user(ut
, &t
, sizeof(t
)) )
521 ret
= sys_io_getevents(ctx_id
, min_nr
, nr
, events
, ut
);
526 /* A write operation does a read from user space and vice versa */
527 #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
529 ssize_t
compat_rw_copy_check_uvector(int type
,
530 const struct compat_iovec __user
*uvector
, unsigned long nr_segs
,
531 unsigned long fast_segs
, struct iovec
*fast_pointer
,
532 struct iovec
**ret_pointer
)
534 compat_ssize_t tot_len
;
535 struct iovec
*iov
= *ret_pointer
= fast_pointer
;
540 * SuS says "The readv() function *may* fail if the iovcnt argument
541 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
542 * traditionally returned zero for zero segments, so...
548 if (nr_segs
> UIO_MAXIOV
|| nr_segs
< 0)
550 if (nr_segs
> fast_segs
) {
552 iov
= kmalloc(nr_segs
*sizeof(struct iovec
), GFP_KERNEL
);
559 if (!access_ok(VERIFY_READ
, uvector
, nr_segs
*sizeof(*uvector
)))
563 * Single unix specification:
564 * We should -EINVAL if an element length is not >= 0 and fitting an
567 * In Linux, the total length is limited to MAX_RW_COUNT, there is
568 * no overflow possibility.
572 for (seg
= 0; seg
< nr_segs
; seg
++) {
576 if (__get_user(len
, &uvector
->iov_len
) ||
577 __get_user(buf
, &uvector
->iov_base
)) {
581 if (len
< 0) /* size_t not fitting in compat_ssize_t .. */
584 !access_ok(vrfy_dir(type
), compat_ptr(buf
), len
)) {
588 if (len
> MAX_RW_COUNT
- tot_len
)
589 len
= MAX_RW_COUNT
- tot_len
;
591 iov
->iov_base
= compat_ptr(buf
);
592 iov
->iov_len
= (compat_size_t
) len
;
603 copy_iocb(long nr
, u32 __user
*ptr32
, struct iocb __user
* __user
*ptr64
)
608 for (i
= 0; i
< nr
; ++i
) {
609 if (get_user(uptr
, ptr32
+ i
))
611 if (put_user(compat_ptr(uptr
), ptr64
+ i
))
617 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
620 compat_sys_io_submit(aio_context_t ctx_id
, int nr
, u32 __user
*iocb
)
622 struct iocb __user
* __user
*iocb64
;
625 if (unlikely(nr
< 0))
628 if (nr
> MAX_AIO_SUBMITS
)
629 nr
= MAX_AIO_SUBMITS
;
631 iocb64
= compat_alloc_user_space(nr
* sizeof(*iocb64
));
632 ret
= copy_iocb(nr
, iocb
, iocb64
);
634 ret
= do_io_submit(ctx_id
, nr
, iocb64
, 1);
638 struct compat_ncp_mount_data
{
639 compat_int_t version
;
640 compat_uint_t ncp_fd
;
641 __compat_uid_t mounted_uid
;
642 compat_pid_t wdog_pid
;
643 unsigned char mounted_vol
[NCP_VOLNAME_LEN
+ 1];
644 compat_uint_t time_out
;
645 compat_uint_t retry_count
;
649 compat_mode_t file_mode
;
650 compat_mode_t dir_mode
;
653 struct compat_ncp_mount_data_v4
{
654 compat_int_t version
;
655 compat_ulong_t flags
;
656 compat_ulong_t mounted_uid
;
657 compat_long_t wdog_pid
;
658 compat_uint_t ncp_fd
;
659 compat_uint_t time_out
;
660 compat_uint_t retry_count
;
663 compat_ulong_t file_mode
;
664 compat_ulong_t dir_mode
;
667 static void *do_ncp_super_data_conv(void *raw_data
)
669 int version
= *(unsigned int *)raw_data
;
672 struct compat_ncp_mount_data
*c_n
= raw_data
;
673 struct ncp_mount_data
*n
= raw_data
;
675 n
->dir_mode
= c_n
->dir_mode
;
676 n
->file_mode
= c_n
->file_mode
;
679 memmove (n
->mounted_vol
, c_n
->mounted_vol
, (sizeof (c_n
->mounted_vol
) + 3 * sizeof (unsigned int)));
680 n
->wdog_pid
= c_n
->wdog_pid
;
681 n
->mounted_uid
= c_n
->mounted_uid
;
682 } else if (version
== 4) {
683 struct compat_ncp_mount_data_v4
*c_n
= raw_data
;
684 struct ncp_mount_data_v4
*n
= raw_data
;
686 n
->dir_mode
= c_n
->dir_mode
;
687 n
->file_mode
= c_n
->file_mode
;
690 n
->retry_count
= c_n
->retry_count
;
691 n
->time_out
= c_n
->time_out
;
692 n
->ncp_fd
= c_n
->ncp_fd
;
693 n
->wdog_pid
= c_n
->wdog_pid
;
694 n
->mounted_uid
= c_n
->mounted_uid
;
695 n
->flags
= c_n
->flags
;
696 } else if (version
!= 5) {
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 NCPFS_NAME "ncpfs"
770 #define NFS4_NAME "nfs4"
772 asmlinkage
long compat_sys_mount(const char __user
* dev_name
,
773 const char __user
* dir_name
,
774 const char __user
* type
, unsigned long flags
,
775 const void __user
* data
)
778 unsigned long data_page
;
780 struct filename
*dir
;
783 retval
= copy_mount_string(type
, &kernel_type
);
787 dir
= getname(dir_name
);
788 retval
= PTR_ERR(dir
);
792 retval
= copy_mount_string(dev_name
, &kernel_dev
);
796 retval
= copy_mount_options(data
, &data_page
);
802 if (kernel_type
&& data_page
) {
803 if (!strcmp(kernel_type
, NCPFS_NAME
)) {
804 do_ncp_super_data_conv((void *)data_page
);
805 } else if (!strcmp(kernel_type
, NFS4_NAME
)) {
806 if (do_nfs4_super_data_conv((void *) data_page
))
811 retval
= do_mount(kernel_dev
, dir
->name
, kernel_type
,
812 flags
, (void*)data_page
);
815 free_page(data_page
);
826 struct compat_old_linux_dirent
{
827 compat_ulong_t d_ino
;
828 compat_ulong_t d_offset
;
829 unsigned short d_namlen
;
833 struct compat_readdir_callback
{
834 struct compat_old_linux_dirent __user
*dirent
;
838 static int compat_fillonedir(void *__buf
, const char *name
, int namlen
,
839 loff_t offset
, u64 ino
, unsigned int d_type
)
841 struct compat_readdir_callback
*buf
= __buf
;
842 struct compat_old_linux_dirent __user
*dirent
;
843 compat_ulong_t d_ino
;
848 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
849 buf
->result
= -EOVERFLOW
;
853 dirent
= buf
->dirent
;
854 if (!access_ok(VERIFY_WRITE
, dirent
,
855 (unsigned long)(dirent
->d_name
+ namlen
+ 1) -
856 (unsigned long)dirent
))
858 if ( __put_user(d_ino
, &dirent
->d_ino
) ||
859 __put_user(offset
, &dirent
->d_offset
) ||
860 __put_user(namlen
, &dirent
->d_namlen
) ||
861 __copy_to_user(dirent
->d_name
, name
, namlen
) ||
862 __put_user(0, dirent
->d_name
+ namlen
))
866 buf
->result
= -EFAULT
;
870 asmlinkage
long compat_sys_old_readdir(unsigned int fd
,
871 struct compat_old_linux_dirent __user
*dirent
, unsigned int count
)
874 struct fd f
= fdget(fd
);
875 struct compat_readdir_callback buf
;
883 error
= vfs_readdir(f
.file
, compat_fillonedir
, &buf
);
891 struct compat_linux_dirent
{
892 compat_ulong_t d_ino
;
893 compat_ulong_t d_off
;
894 unsigned short d_reclen
;
898 struct compat_getdents_callback
{
899 struct compat_linux_dirent __user
*current_dir
;
900 struct compat_linux_dirent __user
*previous
;
905 static int compat_filldir(void *__buf
, const char *name
, int namlen
,
906 loff_t offset
, u64 ino
, unsigned int d_type
)
908 struct compat_linux_dirent __user
* dirent
;
909 struct compat_getdents_callback
*buf
= __buf
;
910 compat_ulong_t d_ino
;
911 int reclen
= ALIGN(offsetof(struct compat_linux_dirent
, d_name
) +
912 namlen
+ 2, sizeof(compat_long_t
));
914 buf
->error
= -EINVAL
; /* only used if we fail.. */
915 if (reclen
> buf
->count
)
918 if (sizeof(d_ino
) < sizeof(ino
) && d_ino
!= ino
) {
919 buf
->error
= -EOVERFLOW
;
922 dirent
= buf
->previous
;
924 if (__put_user(offset
, &dirent
->d_off
))
927 dirent
= buf
->current_dir
;
928 if (__put_user(d_ino
, &dirent
->d_ino
))
930 if (__put_user(reclen
, &dirent
->d_reclen
))
932 if (copy_to_user(dirent
->d_name
, name
, namlen
))
934 if (__put_user(0, dirent
->d_name
+ namlen
))
936 if (__put_user(d_type
, (char __user
*) dirent
+ reclen
- 1))
938 buf
->previous
= dirent
;
939 dirent
= (void __user
*)dirent
+ reclen
;
940 buf
->current_dir
= dirent
;
941 buf
->count
-= reclen
;
944 buf
->error
= -EFAULT
;
948 asmlinkage
long compat_sys_getdents(unsigned int fd
,
949 struct compat_linux_dirent __user
*dirent
, unsigned int count
)
952 struct compat_linux_dirent __user
* lastdirent
;
953 struct compat_getdents_callback buf
;
956 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
963 buf
.current_dir
= dirent
;
968 error
= vfs_readdir(f
.file
, compat_filldir
, &buf
);
971 lastdirent
= buf
.previous
;
973 if (put_user(f
.file
->f_pos
, &lastdirent
->d_off
))
976 error
= count
- buf
.count
;
982 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
984 struct compat_getdents_callback64
{
985 struct linux_dirent64 __user
*current_dir
;
986 struct linux_dirent64 __user
*previous
;
991 static int compat_filldir64(void * __buf
, const char * name
, int namlen
, loff_t offset
,
992 u64 ino
, unsigned int d_type
)
994 struct linux_dirent64 __user
*dirent
;
995 struct compat_getdents_callback64
*buf
= __buf
;
996 int reclen
= ALIGN(offsetof(struct linux_dirent64
, d_name
) + namlen
+ 1,
1000 buf
->error
= -EINVAL
; /* only used if we fail.. */
1001 if (reclen
> buf
->count
)
1003 dirent
= buf
->previous
;
1006 if (__put_user_unaligned(offset
, &dirent
->d_off
))
1009 dirent
= buf
->current_dir
;
1010 if (__put_user_unaligned(ino
, &dirent
->d_ino
))
1013 if (__put_user_unaligned(off
, &dirent
->d_off
))
1015 if (__put_user(reclen
, &dirent
->d_reclen
))
1017 if (__put_user(d_type
, &dirent
->d_type
))
1019 if (copy_to_user(dirent
->d_name
, name
, namlen
))
1021 if (__put_user(0, dirent
->d_name
+ namlen
))
1023 buf
->previous
= dirent
;
1024 dirent
= (void __user
*)dirent
+ reclen
;
1025 buf
->current_dir
= dirent
;
1026 buf
->count
-= reclen
;
1029 buf
->error
= -EFAULT
;
1033 asmlinkage
long compat_sys_getdents64(unsigned int fd
,
1034 struct linux_dirent64 __user
* dirent
, unsigned int count
)
1037 struct linux_dirent64 __user
* lastdirent
;
1038 struct compat_getdents_callback64 buf
;
1041 if (!access_ok(VERIFY_WRITE
, dirent
, count
))
1048 buf
.current_dir
= dirent
;
1049 buf
.previous
= NULL
;
1053 error
= vfs_readdir(f
.file
, compat_filldir64
, &buf
);
1056 lastdirent
= buf
.previous
;
1058 typeof(lastdirent
->d_off
) d_off
= f
.file
->f_pos
;
1059 if (__put_user_unaligned(d_off
, &lastdirent
->d_off
))
1062 error
= count
- buf
.count
;
1067 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1070 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1073 COMPAT_SYSCALL_DEFINE3(open
, const char __user
*, filename
, int, flags
, umode_t
, mode
)
1075 return do_sys_open(AT_FDCWD
, filename
, flags
, mode
);
1079 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1082 COMPAT_SYSCALL_DEFINE4(openat
, int, dfd
, const char __user
*, filename
, int, flags
, umode_t
, mode
)
1084 return do_sys_open(dfd
, filename
, flags
, mode
);
1087 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1089 static int poll_select_copy_remaining(struct timespec
*end_time
, void __user
*p
,
1090 int timeval
, int ret
)
1097 if (current
->personality
& STICKY_TIMEOUTS
)
1100 /* No update for zero timeout */
1101 if (!end_time
->tv_sec
&& !end_time
->tv_nsec
)
1105 ts
= timespec_sub(*end_time
, ts
);
1107 ts
.tv_sec
= ts
.tv_nsec
= 0;
1110 struct compat_timeval rtv
;
1112 rtv
.tv_sec
= ts
.tv_sec
;
1113 rtv
.tv_usec
= ts
.tv_nsec
/ NSEC_PER_USEC
;
1115 if (!copy_to_user(p
, &rtv
, sizeof(rtv
)))
1118 struct compat_timespec rts
;
1120 rts
.tv_sec
= ts
.tv_sec
;
1121 rts
.tv_nsec
= ts
.tv_nsec
;
1123 if (!copy_to_user(p
, &rts
, sizeof(rts
)))
1127 * If an application puts its timeval in read-only memory, we
1128 * don't want the Linux-specific update to the timeval to
1129 * cause a fault after the select has completed
1130 * successfully. However, because we're not updating the
1131 * timeval, we can't restart the system call.
1135 if (ret
== -ERESTARTNOHAND
)
1141 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1142 * 64-bit unsigned longs.
1145 int compat_get_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1146 unsigned long *fdset
)
1148 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1152 if (!access_ok(VERIFY_WRITE
, ufdset
, nr
*sizeof(compat_ulong_t
)))
1159 if (__get_user(l
, ufdset
) || __get_user(h
, ufdset
+1))
1162 *fdset
++ = h
<< 32 | l
;
1165 if (odd
&& __get_user(*fdset
, ufdset
))
1168 /* Tricky, must clear full unsigned long in the
1169 * kernel fdset at the end, this makes sure that
1172 memset(fdset
, 0, ((nr
+ 1) & ~1)*sizeof(compat_ulong_t
));
1178 int compat_set_fd_set(unsigned long nr
, compat_ulong_t __user
*ufdset
,
1179 unsigned long *fdset
)
1182 nr
= DIV_ROUND_UP(nr
, __COMPAT_NFDBITS
);
1193 if (__put_user(l
, ufdset
) || __put_user(h
, ufdset
+1))
1198 if (odd
&& __put_user(*fdset
, ufdset
))
1205 * This is a virtual copy of sys_select from fs/select.c and probably
1206 * should be compared to it from time to time
1210 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1211 * like to be certain this leads to no problems. So I return
1212 * EINTR just for safety.
1214 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1215 * I'm trying ERESTARTNOHAND which restart only when you want to.
1217 int compat_core_sys_select(int n
, compat_ulong_t __user
*inp
,
1218 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1219 struct timespec
*end_time
)
1223 int size
, max_fds
, ret
= -EINVAL
;
1224 struct fdtable
*fdt
;
1225 long stack_fds
[SELECT_STACK_ALLOC
/sizeof(long)];
1230 /* max_fds can increase, so grab it once to avoid race */
1232 fdt
= files_fdtable(current
->files
);
1233 max_fds
= fdt
->max_fds
;
1239 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1240 * since we used fdset we need to allocate memory in units of
1243 size
= FDS_BYTES(n
);
1245 if (size
> sizeof(stack_fds
) / 6) {
1246 bits
= kmalloc(6 * size
, GFP_KERNEL
);
1251 fds
.in
= (unsigned long *) bits
;
1252 fds
.out
= (unsigned long *) (bits
+ size
);
1253 fds
.ex
= (unsigned long *) (bits
+ 2*size
);
1254 fds
.res_in
= (unsigned long *) (bits
+ 3*size
);
1255 fds
.res_out
= (unsigned long *) (bits
+ 4*size
);
1256 fds
.res_ex
= (unsigned long *) (bits
+ 5*size
);
1258 if ((ret
= compat_get_fd_set(n
, inp
, fds
.in
)) ||
1259 (ret
= compat_get_fd_set(n
, outp
, fds
.out
)) ||
1260 (ret
= compat_get_fd_set(n
, exp
, fds
.ex
)))
1262 zero_fd_set(n
, fds
.res_in
);
1263 zero_fd_set(n
, fds
.res_out
);
1264 zero_fd_set(n
, fds
.res_ex
);
1266 ret
= do_select(n
, &fds
, end_time
);
1271 ret
= -ERESTARTNOHAND
;
1272 if (signal_pending(current
))
1277 if (compat_set_fd_set(n
, inp
, fds
.res_in
) ||
1278 compat_set_fd_set(n
, outp
, fds
.res_out
) ||
1279 compat_set_fd_set(n
, exp
, fds
.res_ex
))
1282 if (bits
!= stack_fds
)
1288 asmlinkage
long compat_sys_select(int n
, compat_ulong_t __user
*inp
,
1289 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1290 struct compat_timeval __user
*tvp
)
1292 struct timespec end_time
, *to
= NULL
;
1293 struct compat_timeval tv
;
1297 if (copy_from_user(&tv
, tvp
, sizeof(tv
)))
1301 if (poll_select_set_timeout(to
,
1302 tv
.tv_sec
+ (tv
.tv_usec
/ USEC_PER_SEC
),
1303 (tv
.tv_usec
% USEC_PER_SEC
) * NSEC_PER_USEC
))
1307 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1308 ret
= poll_select_copy_remaining(&end_time
, tvp
, 1, ret
);
1313 struct compat_sel_arg_struct
{
1321 asmlinkage
long compat_sys_old_select(struct compat_sel_arg_struct __user
*arg
)
1323 struct compat_sel_arg_struct a
;
1325 if (copy_from_user(&a
, arg
, sizeof(a
)))
1327 return compat_sys_select(a
.n
, compat_ptr(a
.inp
), compat_ptr(a
.outp
),
1328 compat_ptr(a
.exp
), compat_ptr(a
.tvp
));
1331 static long do_compat_pselect(int n
, compat_ulong_t __user
*inp
,
1332 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1333 struct compat_timespec __user
*tsp
, compat_sigset_t __user
*sigmask
,
1334 compat_size_t sigsetsize
)
1336 compat_sigset_t ss32
;
1337 sigset_t ksigmask
, sigsaved
;
1338 struct compat_timespec ts
;
1339 struct timespec end_time
, *to
= NULL
;
1343 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1347 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1352 if (sigsetsize
!= sizeof(compat_sigset_t
))
1354 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1356 sigset_from_compat(&ksigmask
, &ss32
);
1358 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1359 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1362 ret
= compat_core_sys_select(n
, inp
, outp
, exp
, to
);
1363 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1365 if (ret
== -ERESTARTNOHAND
) {
1367 * Don't restore the signal mask yet. Let do_signal() deliver
1368 * the signal on the way back to userspace, before the signal
1372 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1374 set_restore_sigmask();
1377 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1382 asmlinkage
long compat_sys_pselect6(int n
, compat_ulong_t __user
*inp
,
1383 compat_ulong_t __user
*outp
, compat_ulong_t __user
*exp
,
1384 struct compat_timespec __user
*tsp
, void __user
*sig
)
1386 compat_size_t sigsetsize
= 0;
1387 compat_uptr_t up
= 0;
1390 if (!access_ok(VERIFY_READ
, sig
,
1391 sizeof(compat_uptr_t
)+sizeof(compat_size_t
)) ||
1392 __get_user(up
, (compat_uptr_t __user
*)sig
) ||
1393 __get_user(sigsetsize
,
1394 (compat_size_t __user
*)(sig
+sizeof(up
))))
1397 return do_compat_pselect(n
, inp
, outp
, exp
, tsp
, compat_ptr(up
),
1401 asmlinkage
long compat_sys_ppoll(struct pollfd __user
*ufds
,
1402 unsigned int nfds
, struct compat_timespec __user
*tsp
,
1403 const compat_sigset_t __user
*sigmask
, compat_size_t sigsetsize
)
1405 compat_sigset_t ss32
;
1406 sigset_t ksigmask
, sigsaved
;
1407 struct compat_timespec ts
;
1408 struct timespec end_time
, *to
= NULL
;
1412 if (copy_from_user(&ts
, tsp
, sizeof(ts
)))
1416 if (poll_select_set_timeout(to
, ts
.tv_sec
, ts
.tv_nsec
))
1421 if (sigsetsize
!= sizeof(compat_sigset_t
))
1423 if (copy_from_user(&ss32
, sigmask
, sizeof(ss32
)))
1425 sigset_from_compat(&ksigmask
, &ss32
);
1427 sigdelsetmask(&ksigmask
, sigmask(SIGKILL
)|sigmask(SIGSTOP
));
1428 sigprocmask(SIG_SETMASK
, &ksigmask
, &sigsaved
);
1431 ret
= do_sys_poll(ufds
, nfds
, to
);
1433 /* We can restart this syscall, usually */
1434 if (ret
== -EINTR
) {
1436 * Don't restore the signal mask yet. Let do_signal() deliver
1437 * the signal on the way back to userspace, before the signal
1441 memcpy(¤t
->saved_sigmask
, &sigsaved
,
1443 set_restore_sigmask();
1445 ret
= -ERESTARTNOHAND
;
1447 sigprocmask(SIG_SETMASK
, &sigsaved
, NULL
);
1449 ret
= poll_select_copy_remaining(&end_time
, tsp
, 0, ret
);
1454 #ifdef CONFIG_FHANDLE
1456 * Exactly like fs/open.c:sys_open_by_handle_at(), except that it
1457 * doesn't set the O_LARGEFILE flag.
1459 COMPAT_SYSCALL_DEFINE3(open_by_handle_at
, int, mountdirfd
,
1460 struct file_handle __user
*, handle
, int, flags
)
1462 return do_handle_open(mountdirfd
, handle
, flags
);