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/vfs.h>
28 #include <linux/ioctl.h>
29 #include <linux/init.h>
30 #include <linux/smb.h>
31 #include <linux/smb_mount.h>
32 #include <linux/ncp_mount.h>
33 #include <linux/nfs4_mount.h>
34 #include <linux/smp_lock.h>
35 #include <linux/syscalls.h>
36 #include <linux/ctype.h>
37 #include <linux/module.h>
38 #include <linux/dirent.h>
39 #include <linux/fsnotify.h>
40 #include <linux/highuid.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/syscall.h>
44 #include <linux/personality.h>
45 #include <linux/rwsem.h>
46 #include <linux/tsacct_kern.h>
47 #include <linux/security.h>
48 #include <linux/highmem.h>
49 #include <linux/signal.h>
50 #include <linux/poll.h>
52 #include <linux/eventpoll.h>
54 #include <asm/uaccess.h>
55 #include <asm/mmu_context.h>
56 #include <asm/ioctls.h>
61 int compat_printk(const char *fmt, ...)
68 ret = vprintk(fmt, ap);
73 #include "read_write.h"
76 * Not all architectures have sys_utime, so implement this in terms
79 asmlinkage long compat_sys_utime(char __user *filename, 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, 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[0].tv_nsec == UTIME_NOW)
103 && tv[0].tv_sec != 0)
105 if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW)
106 && tv[1].tv_sec != 0)
109 if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
112 return do_utimes(dfd, filename, t ? tv : NULL, flags);
115 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
117 struct timespec tv[2];
120 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
121 get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
122 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
123 get_user(tv[1].tv_nsec, &t[1].tv_usec))
125 if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
126 tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
128 tv[0].tv_nsec *= 1000;
129 tv[1].tv_nsec *= 1000;
131 return do_utimes(dfd, filename, t ? tv : NULL, 0);
134 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
136 return compat_sys_futimesat(AT_FDCWD, filename, t);
139 asmlinkage long compat_sys_newstat(char __user * filename,
140 struct compat_stat __user *statbuf)
143 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
146 error = cp_compat_stat(&stat, statbuf);
150 asmlinkage long compat_sys_newlstat(char __user * filename,
151 struct compat_stat __user *statbuf)
154 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
157 error = cp_compat_stat(&stat, statbuf);
161 #ifndef __ARCH_WANT_STAT64
162 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
163 struct compat_stat __user *statbuf, int flag)
168 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
171 if (flag & AT_SYMLINK_NOFOLLOW)
172 error = vfs_lstat_fd(dfd, filename, &stat);
174 error = vfs_stat_fd(dfd, filename, &stat);
177 error = cp_compat_stat(&stat, statbuf);
184 asmlinkage long compat_sys_newfstat(unsigned int fd,
185 struct compat_stat __user * statbuf)
188 int error = vfs_fstat(fd, &stat);
191 error = cp_compat_stat(&stat, statbuf);
195 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
198 if (sizeof ubuf->f_blocks == 4) {
199 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
200 0xffffffff00000000ULL)
202 /* f_files and f_ffree may be -1; it's okay
203 * to stuff that into 32 bits */
204 if (kbuf->f_files != 0xffffffffffffffffULL
205 && (kbuf->f_files & 0xffffffff00000000ULL))
207 if (kbuf->f_ffree != 0xffffffffffffffffULL
208 && (kbuf->f_ffree & 0xffffffff00000000ULL))
211 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
212 __put_user(kbuf->f_type, &ubuf->f_type) ||
213 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
214 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
215 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
216 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
217 __put_user(kbuf->f_files, &ubuf->f_files) ||
218 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
219 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
220 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
221 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
222 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
223 __put_user(0, &ubuf->f_spare[0]) ||
224 __put_user(0, &ubuf->f_spare[1]) ||
225 __put_user(0, &ubuf->f_spare[2]) ||
226 __put_user(0, &ubuf->f_spare[3]) ||
227 __put_user(0, &ubuf->f_spare[4]))
233 * The following statfs calls are copies of code from fs/open.c and
234 * should be checked against those from time to time
236 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
241 error = user_path_walk(path, &nd);
244 error = vfs_statfs(nd.path.dentry, &tmp);
246 error = put_compat_statfs(buf, &tmp);
252 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
262 error = vfs_statfs(file->f_path.dentry, &tmp);
264 error = put_compat_statfs(buf, &tmp);
270 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
272 if (sizeof ubuf->f_blocks == 4) {
273 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
274 0xffffffff00000000ULL)
276 /* f_files and f_ffree may be -1; it's okay
277 * to stuff that into 32 bits */
278 if (kbuf->f_files != 0xffffffffffffffffULL
279 && (kbuf->f_files & 0xffffffff00000000ULL))
281 if (kbuf->f_ffree != 0xffffffffffffffffULL
282 && (kbuf->f_ffree & 0xffffffff00000000ULL))
285 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
286 __put_user(kbuf->f_type, &ubuf->f_type) ||
287 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
288 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
289 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
290 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
291 __put_user(kbuf->f_files, &ubuf->f_files) ||
292 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
293 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
294 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
295 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
296 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
301 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
306 if (sz != sizeof(*buf))
309 error = user_path_walk(path, &nd);
312 error = vfs_statfs(nd.path.dentry, &tmp);
314 error = put_compat_statfs64(buf, &tmp);
320 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
326 if (sz != sizeof(*buf))
333 error = vfs_statfs(file->f_path.dentry, &tmp);
335 error = put_compat_statfs64(buf, &tmp);
341 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
343 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
344 __get_user(kfl->l_type, &ufl->l_type) ||
345 __get_user(kfl->l_whence, &ufl->l_whence) ||
346 __get_user(kfl->l_start, &ufl->l_start) ||
347 __get_user(kfl->l_len, &ufl->l_len) ||
348 __get_user(kfl->l_pid, &ufl->l_pid))
353 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
355 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
356 __put_user(kfl->l_type, &ufl->l_type) ||
357 __put_user(kfl->l_whence, &ufl->l_whence) ||
358 __put_user(kfl->l_start, &ufl->l_start) ||
359 __put_user(kfl->l_len, &ufl->l_len) ||
360 __put_user(kfl->l_pid, &ufl->l_pid))
365 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
366 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
368 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
369 __get_user(kfl->l_type, &ufl->l_type) ||
370 __get_user(kfl->l_whence, &ufl->l_whence) ||
371 __get_user(kfl->l_start, &ufl->l_start) ||
372 __get_user(kfl->l_len, &ufl->l_len) ||
373 __get_user(kfl->l_pid, &ufl->l_pid))
379 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
380 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
382 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
383 __put_user(kfl->l_type, &ufl->l_type) ||
384 __put_user(kfl->l_whence, &ufl->l_whence) ||
385 __put_user(kfl->l_start, &ufl->l_start) ||
386 __put_user(kfl->l_len, &ufl->l_len) ||
387 __put_user(kfl->l_pid, &ufl->l_pid))
393 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
404 ret = get_compat_flock(&f, compat_ptr(arg));
409 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
411 if (cmd == F_GETLK && ret == 0) {
412 /* GETLK was successfule and we need to return the data...
413 * but it needs to fit in the compat structure.
414 * l_start shouldn't be too big, unless the original
415 * start + end is greater than COMPAT_OFF_T_MAX, in which
416 * case the app was asking for trouble, so we return
417 * -EOVERFLOW in that case.
418 * l_len could be too big, in which case we just truncate it,
419 * and only allow the app to see that part of the conflicting
420 * lock that might make sense to it anyway
423 if (f.l_start > COMPAT_OFF_T_MAX)
425 if (f.l_len > COMPAT_OFF_T_MAX)
426 f.l_len = COMPAT_OFF_T_MAX;
428 ret = put_compat_flock(&f, compat_ptr(arg));
435 ret = get_compat_flock64(&f, compat_ptr(arg));
440 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
441 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
444 if (cmd == F_GETLK64 && ret == 0) {
445 /* need to return lock information - see above for commentary */
446 if (f.l_start > COMPAT_LOFF_T_MAX)
448 if (f.l_len > COMPAT_LOFF_T_MAX)
449 f.l_len = COMPAT_LOFF_T_MAX;
451 ret = put_compat_flock64(&f, compat_ptr(arg));
456 ret = sys_fcntl(fd, cmd, arg);
462 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
465 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
467 return compat_sys_fcntl64(fd, cmd, arg);
471 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
476 mm_segment_t oldfs = get_fs();
477 if (unlikely(get_user(ctx64, ctx32p)))
481 /* The __user pointer cast is valid because of the set_fs() */
482 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
484 /* truncating is ok because it's a user address */
486 ret = put_user((u32) ctx64, ctx32p);
491 compat_sys_io_getevents(aio_context_t ctx_id,
492 unsigned long min_nr,
494 struct io_event __user *events,
495 struct compat_timespec __user *timeout)
499 struct timespec __user *ut = NULL;
502 if (unlikely(!access_ok(VERIFY_WRITE, events,
503 nr * sizeof(struct io_event))))
506 if (get_compat_timespec(&t, timeout))
509 ut = compat_alloc_user_space(sizeof(*ut));
510 if (copy_to_user(ut, &t, sizeof(t)) )
513 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
519 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
524 for (i = 0; i < nr; ++i) {
525 if (get_user(uptr, ptr32 + i))
527 if (put_user(compat_ptr(uptr), ptr64 + i))
533 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
536 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
538 struct iocb __user * __user *iocb64;
541 if (unlikely(nr < 0))
544 if (nr > MAX_AIO_SUBMITS)
545 nr = MAX_AIO_SUBMITS;
547 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
548 ret = copy_iocb(nr, iocb, iocb64);
550 ret = sys_io_submit(ctx_id, nr, iocb64);
554 struct compat_ncp_mount_data {
555 compat_int_t version;
556 compat_uint_t ncp_fd;
557 __compat_uid_t mounted_uid;
558 compat_pid_t wdog_pid;
559 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
560 compat_uint_t time_out;
561 compat_uint_t retry_count;
565 compat_mode_t file_mode;
566 compat_mode_t dir_mode;
569 struct compat_ncp_mount_data_v4 {
570 compat_int_t version;
571 compat_ulong_t flags;
572 compat_ulong_t mounted_uid;
573 compat_long_t wdog_pid;
574 compat_uint_t ncp_fd;
575 compat_uint_t time_out;
576 compat_uint_t retry_count;
579 compat_ulong_t file_mode;
580 compat_ulong_t dir_mode;
583 static void *do_ncp_super_data_conv(void *raw_data)
585 int version = *(unsigned int *)raw_data;
588 struct compat_ncp_mount_data *c_n = raw_data;
589 struct ncp_mount_data *n = raw_data;
591 n->dir_mode = c_n->dir_mode;
592 n->file_mode = c_n->file_mode;
595 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
596 n->wdog_pid = c_n->wdog_pid;
597 n->mounted_uid = c_n->mounted_uid;
598 } else if (version == 4) {
599 struct compat_ncp_mount_data_v4 *c_n = raw_data;
600 struct ncp_mount_data_v4 *n = raw_data;
602 n->dir_mode = c_n->dir_mode;
603 n->file_mode = c_n->file_mode;
606 n->retry_count = c_n->retry_count;
607 n->time_out = c_n->time_out;
608 n->ncp_fd = c_n->ncp_fd;
609 n->wdog_pid = c_n->wdog_pid;
610 n->mounted_uid = c_n->mounted_uid;
611 n->flags = c_n->flags;
612 } else if (version != 5) {
619 struct compat_smb_mount_data {
620 compat_int_t version;
621 __compat_uid_t mounted_uid;
624 compat_mode_t file_mode;
625 compat_mode_t dir_mode;
628 static void *do_smb_super_data_conv(void *raw_data)
630 struct smb_mount_data *s = raw_data;
631 struct compat_smb_mount_data *c_s = raw_data;
633 if (c_s->version != SMB_MOUNT_OLDVERSION)
635 s->dir_mode = c_s->dir_mode;
636 s->file_mode = c_s->file_mode;
639 s->mounted_uid = c_s->mounted_uid;
644 struct compat_nfs_string {
649 static inline void compat_nfs_string(struct nfs_string *dst,
650 struct compat_nfs_string *src)
652 dst->data = compat_ptr(src->data);
656 struct compat_nfs4_mount_data_v1 {
657 compat_int_t version;
662 compat_int_t retrans;
663 compat_int_t acregmin;
664 compat_int_t acregmax;
665 compat_int_t acdirmin;
666 compat_int_t acdirmax;
667 struct compat_nfs_string client_addr;
668 struct compat_nfs_string mnt_path;
669 struct compat_nfs_string hostname;
670 compat_uint_t host_addrlen;
671 compat_uptr_t host_addr;
673 compat_int_t auth_flavourlen;
674 compat_uptr_t auth_flavours;
677 static int do_nfs4_super_data_conv(void *raw_data)
679 int version = *(compat_uint_t *) raw_data;
682 struct compat_nfs4_mount_data_v1 *raw = raw_data;
683 struct nfs4_mount_data *real = raw_data;
685 /* copy the fields backwards */
686 real->auth_flavours = compat_ptr(raw->auth_flavours);
687 real->auth_flavourlen = raw->auth_flavourlen;
688 real->proto = raw->proto;
689 real->host_addr = compat_ptr(raw->host_addr);
690 real->host_addrlen = raw->host_addrlen;
691 compat_nfs_string(&real->hostname, &raw->hostname);
692 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
693 compat_nfs_string(&real->client_addr, &raw->client_addr);
694 real->acdirmax = raw->acdirmax;
695 real->acdirmin = raw->acdirmin;
696 real->acregmax = raw->acregmax;
697 real->acregmin = raw->acregmin;
698 real->retrans = raw->retrans;
699 real->timeo = raw->timeo;
700 real->wsize = raw->wsize;
701 real->rsize = raw->rsize;
702 real->flags = raw->flags;
703 real->version = raw->version;
709 #define SMBFS_NAME "smbfs"
710 #define NCPFS_NAME "ncpfs"
711 #define NFS4_NAME "nfs4"
713 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
714 char __user * type, unsigned long flags,
717 unsigned long type_page;
718 unsigned long data_page;
719 unsigned long dev_page;
723 retval = copy_mount_options (type, &type_page);
727 dir_page = getname(dir_name);
728 retval = PTR_ERR(dir_page);
729 if (IS_ERR(dir_page))
732 retval = copy_mount_options (dev_name, &dev_page);
736 retval = copy_mount_options (data, &data_page);
742 if (type_page && data_page) {
743 if (!strcmp((char *)type_page, SMBFS_NAME)) {
744 do_smb_super_data_conv((void *)data_page);
745 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
746 do_ncp_super_data_conv((void *)data_page);
747 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
748 if (do_nfs4_super_data_conv((void *) data_page))
754 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
755 flags, (void*)data_page);
759 free_page(data_page);
765 free_page(type_page);
770 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
772 struct compat_old_linux_dirent {
773 compat_ulong_t d_ino;
774 compat_ulong_t d_offset;
775 unsigned short d_namlen;
779 struct compat_readdir_callback {
780 struct compat_old_linux_dirent __user *dirent;
784 static int compat_fillonedir(void *__buf, const char *name, int namlen,
785 loff_t offset, u64 ino, unsigned int d_type)
787 struct compat_readdir_callback *buf = __buf;
788 struct compat_old_linux_dirent __user *dirent;
789 compat_ulong_t d_ino;
794 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
797 dirent = buf->dirent;
798 if (!access_ok(VERIFY_WRITE, dirent,
799 (unsigned long)(dirent->d_name + namlen + 1) -
800 (unsigned long)dirent))
802 if ( __put_user(d_ino, &dirent->d_ino) ||
803 __put_user(offset, &dirent->d_offset) ||
804 __put_user(namlen, &dirent->d_namlen) ||
805 __copy_to_user(dirent->d_name, name, namlen) ||
806 __put_user(0, dirent->d_name + namlen))
810 buf->result = -EFAULT;
814 asmlinkage long compat_sys_old_readdir(unsigned int fd,
815 struct compat_old_linux_dirent __user *dirent, unsigned int count)
819 struct compat_readdir_callback buf;
829 error = vfs_readdir(file, compat_fillonedir, &buf);
838 struct compat_linux_dirent {
839 compat_ulong_t d_ino;
840 compat_ulong_t d_off;
841 unsigned short d_reclen;
845 struct compat_getdents_callback {
846 struct compat_linux_dirent __user *current_dir;
847 struct compat_linux_dirent __user *previous;
852 static int compat_filldir(void *__buf, const char *name, int namlen,
853 loff_t offset, u64 ino, unsigned int d_type)
855 struct compat_linux_dirent __user * dirent;
856 struct compat_getdents_callback *buf = __buf;
857 compat_ulong_t d_ino;
858 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
860 buf->error = -EINVAL; /* only used if we fail.. */
861 if (reclen > buf->count)
864 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
866 dirent = buf->previous;
868 if (__put_user(offset, &dirent->d_off))
871 dirent = buf->current_dir;
872 if (__put_user(d_ino, &dirent->d_ino))
874 if (__put_user(reclen, &dirent->d_reclen))
876 if (copy_to_user(dirent->d_name, name, namlen))
878 if (__put_user(0, dirent->d_name + namlen))
880 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
882 buf->previous = dirent;
883 dirent = (void __user *)dirent + reclen;
884 buf->current_dir = dirent;
885 buf->count -= reclen;
888 buf->error = -EFAULT;
892 asmlinkage long compat_sys_getdents(unsigned int fd,
893 struct compat_linux_dirent __user *dirent, unsigned int count)
896 struct compat_linux_dirent __user * lastdirent;
897 struct compat_getdents_callback buf;
901 if (!access_ok(VERIFY_WRITE, dirent, count))
909 buf.current_dir = dirent;
914 error = vfs_readdir(file, compat_filldir, &buf);
918 lastdirent = buf.previous;
920 if (put_user(file->f_pos, &lastdirent->d_off))
923 error = count - buf.count;
932 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
934 struct compat_getdents_callback64 {
935 struct linux_dirent64 __user *current_dir;
936 struct linux_dirent64 __user *previous;
941 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
942 u64 ino, unsigned int d_type)
944 struct linux_dirent64 __user *dirent;
945 struct compat_getdents_callback64 *buf = __buf;
946 int jj = NAME_OFFSET(dirent);
947 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
950 buf->error = -EINVAL; /* only used if we fail.. */
951 if (reclen > buf->count)
953 dirent = buf->previous;
956 if (__put_user_unaligned(offset, &dirent->d_off))
959 dirent = buf->current_dir;
960 if (__put_user_unaligned(ino, &dirent->d_ino))
963 if (__put_user_unaligned(off, &dirent->d_off))
965 if (__put_user(reclen, &dirent->d_reclen))
967 if (__put_user(d_type, &dirent->d_type))
969 if (copy_to_user(dirent->d_name, name, namlen))
971 if (__put_user(0, dirent->d_name + namlen))
973 buf->previous = dirent;
974 dirent = (void __user *)dirent + reclen;
975 buf->current_dir = dirent;
976 buf->count -= reclen;
979 buf->error = -EFAULT;
983 asmlinkage long compat_sys_getdents64(unsigned int fd,
984 struct linux_dirent64 __user * dirent, unsigned int count)
987 struct linux_dirent64 __user * lastdirent;
988 struct compat_getdents_callback64 buf;
992 if (!access_ok(VERIFY_WRITE, dirent, count))
1000 buf.current_dir = dirent;
1001 buf.previous = NULL;
1005 error = vfs_readdir(file, compat_filldir64, &buf);
1009 lastdirent = buf.previous;
1011 typeof(lastdirent->d_off) d_off = file->f_pos;
1013 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1015 error = count - buf.count;
1023 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1025 static ssize_t compat_do_readv_writev(int type, struct file *file,
1026 const struct compat_iovec __user *uvector,
1027 unsigned long nr_segs, loff_t *pos)
1029 compat_ssize_t tot_len;
1030 struct iovec iovstack[UIO_FASTIOV];
1031 struct iovec *iov=iovstack, *vector;
1038 * SuS says "The readv() function *may* fail if the iovcnt argument
1039 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1040 * traditionally returned zero for zero segments, so...
1047 * First get the "struct iovec" from user memory and
1048 * verify all the pointers
1051 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1055 if (nr_segs > UIO_FASTIOV) {
1057 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1062 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1066 * Single unix specification:
1067 * We should -EINVAL if an element length is not >= 0 and fitting an
1068 * ssize_t. The total length is fitting an ssize_t
1070 * Be careful here because iov_len is a size_t not an ssize_t
1075 for (seg = 0 ; seg < nr_segs; seg++) {
1076 compat_ssize_t tmp = tot_len;
1080 if (__get_user(len, &uvector->iov_len) ||
1081 __get_user(buf, &uvector->iov_base)) {
1085 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1088 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1090 vector->iov_base = compat_ptr(buf);
1091 vector->iov_len = (compat_size_t) len;
1100 ret = rw_verify_area(type, file, pos, tot_len);
1106 fn = file->f_op->read;
1107 fnv = file->f_op->aio_read;
1109 fn = (io_fn_t)file->f_op->write;
1110 fnv = file->f_op->aio_write;
1114 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1117 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1120 if (iov != iovstack)
1122 if ((ret + (type == READ)) > 0) {
1123 struct dentry *dentry = file->f_path.dentry;
1125 fsnotify_access(dentry);
1127 fsnotify_modify(dentry);
1133 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1136 ssize_t ret = -EBADF;
1142 if (!(file->f_mode & FMODE_READ))
1146 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1149 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1157 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1160 ssize_t ret = -EBADF;
1165 if (!(file->f_mode & FMODE_WRITE))
1169 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1172 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1180 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1181 unsigned int nr_segs, unsigned int flags)
1184 struct iovec __user *iov;
1185 if (nr_segs > UIO_MAXIOV)
1187 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1188 for (i = 0; i < nr_segs; i++) {
1189 struct compat_iovec v;
1190 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1191 get_user(v.iov_len, &iov32[i].iov_len) ||
1192 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1193 put_user(v.iov_len, &iov[i].iov_len))
1196 return sys_vmsplice(fd, iov, nr_segs, flags);
1200 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1204 compat_sys_open(const char __user *filename, int flags, int mode)
1206 return do_sys_open(AT_FDCWD, filename, flags, mode);
1210 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1214 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1216 return do_sys_open(dfd, filename, flags, mode);
1220 * compat_count() counts the number of arguments/envelopes. It is basically
1221 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1222 * and envp pointers.
1224 static int compat_count(compat_uptr_t __user *argv, int max)
1232 if (get_user(p, argv))
1245 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1246 * except that it works with 32 bit argv and envp pointers.
1248 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1249 struct linux_binprm *bprm)
1251 struct page *kmapped_page = NULL;
1253 unsigned long kpos = 0;
1256 while (argc-- > 0) {
1261 if (get_user(str, argv+argc) ||
1262 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1267 if (len > MAX_ARG_STRLEN) {
1272 /* We're going to work our way backwords. */
1278 int offset, bytes_to_copy;
1280 offset = pos % PAGE_SIZE;
1284 bytes_to_copy = offset;
1285 if (bytes_to_copy > len)
1286 bytes_to_copy = len;
1288 offset -= bytes_to_copy;
1289 pos -= bytes_to_copy;
1290 str -= bytes_to_copy;
1291 len -= bytes_to_copy;
1293 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1296 #ifdef CONFIG_STACK_GROWSUP
1297 ret = expand_stack_downwards(bprm->vma, pos);
1299 /* We've exceed the stack rlimit. */
1304 ret = get_user_pages(current, bprm->mm, pos,
1305 1, 1, 1, &page, NULL);
1307 /* We've exceed the stack rlimit. */
1313 flush_kernel_dcache_page(kmapped_page);
1314 kunmap(kmapped_page);
1315 put_page(kmapped_page);
1317 kmapped_page = page;
1318 kaddr = kmap(kmapped_page);
1319 kpos = pos & PAGE_MASK;
1320 flush_cache_page(bprm->vma, kpos,
1321 page_to_pfn(kmapped_page));
1323 if (copy_from_user(kaddr+offset, compat_ptr(str),
1333 flush_kernel_dcache_page(kmapped_page);
1334 kunmap(kmapped_page);
1335 put_page(kmapped_page);
1341 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1342 * that it processes 32 bit argv and envp pointers.
1344 int compat_do_execve(char * filename,
1345 compat_uptr_t __user *argv,
1346 compat_uptr_t __user *envp,
1347 struct pt_regs * regs)
1349 struct linux_binprm *bprm;
1354 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1358 file = open_exec(filename);
1359 retval = PTR_ERR(file);
1366 bprm->filename = filename;
1367 bprm->interp = filename;
1369 retval = bprm_mm_init(bprm);
1373 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1374 if ((retval = bprm->argc) < 0)
1377 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1378 if ((retval = bprm->envc) < 0)
1381 retval = security_bprm_alloc(bprm);
1385 retval = prepare_binprm(bprm);
1389 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1393 bprm->exec = bprm->p;
1394 retval = compat_copy_strings(bprm->envc, envp, bprm);
1398 retval = compat_copy_strings(bprm->argc, argv, bprm);
1402 retval = search_binary_handler(bprm, regs);
1404 /* execve success */
1405 security_bprm_free(bprm);
1406 acct_update_integrals(current);
1413 security_bprm_free(bprm);
1421 allow_write_access(bprm->file);
1432 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1435 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1436 * 64-bit unsigned longs.
1439 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1440 unsigned long *fdset)
1442 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1446 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1453 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1456 *fdset++ = h << 32 | l;
1459 if (odd && __get_user(*fdset, ufdset))
1462 /* Tricky, must clear full unsigned long in the
1463 * kernel fdset at the end, this makes sure that
1466 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1472 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1473 unsigned long *fdset)
1476 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1487 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1492 if (odd && __put_user(*fdset, ufdset))
1499 * This is a virtual copy of sys_select from fs/select.c and probably
1500 * should be compared to it from time to time
1504 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1505 * like to be certain this leads to no problems. So I return
1506 * EINTR just for safety.
1508 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1509 * I'm trying ERESTARTNOHAND which restart only when you want to.
1511 #define MAX_SELECT_SECONDS \
1512 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1514 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1515 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1519 int size, max_fds, ret = -EINVAL;
1520 struct fdtable *fdt;
1521 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1526 /* max_fds can increase, so grab it once to avoid race */
1528 fdt = files_fdtable(current->files);
1529 max_fds = fdt->max_fds;
1535 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1536 * since we used fdset we need to allocate memory in units of
1539 size = FDS_BYTES(n);
1541 if (size > sizeof(stack_fds) / 6) {
1542 bits = kmalloc(6 * size, GFP_KERNEL);
1547 fds.in = (unsigned long *) bits;
1548 fds.out = (unsigned long *) (bits + size);
1549 fds.ex = (unsigned long *) (bits + 2*size);
1550 fds.res_in = (unsigned long *) (bits + 3*size);
1551 fds.res_out = (unsigned long *) (bits + 4*size);
1552 fds.res_ex = (unsigned long *) (bits + 5*size);
1554 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1555 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1556 (ret = compat_get_fd_set(n, exp, fds.ex)))
1558 zero_fd_set(n, fds.res_in);
1559 zero_fd_set(n, fds.res_out);
1560 zero_fd_set(n, fds.res_ex);
1562 ret = do_select(n, &fds, timeout);
1567 ret = -ERESTARTNOHAND;
1568 if (signal_pending(current))
1573 if (compat_set_fd_set(n, inp, fds.res_in) ||
1574 compat_set_fd_set(n, outp, fds.res_out) ||
1575 compat_set_fd_set(n, exp, fds.res_ex))
1578 if (bits != stack_fds)
1584 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1585 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1586 struct compat_timeval __user *tvp)
1589 struct compat_timeval tv;
1593 if (copy_from_user(&tv, tvp, sizeof(tv)))
1596 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1599 /* Cast to u64 to make GCC stop complaining */
1600 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1601 timeout = -1; /* infinite */
1603 timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ);
1604 timeout += tv.tv_sec * HZ;
1608 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1611 struct compat_timeval rtv;
1613 if (current->personality & STICKY_TIMEOUTS)
1615 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1616 rtv.tv_sec = timeout;
1617 if (compat_timeval_compare(&rtv, &tv) >= 0)
1619 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1622 * If an application puts its timeval in read-only
1623 * memory, we don't want the Linux-specific update to
1624 * the timeval to cause a fault after the select has
1625 * completed successfully. However, because we're not
1626 * updating the timeval, we can't restart the system
1629 if (ret == -ERESTARTNOHAND)
1637 #ifdef HAVE_SET_RESTORE_SIGMASK
1638 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1639 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1640 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1641 compat_size_t sigsetsize)
1643 compat_sigset_t ss32;
1644 sigset_t ksigmask, sigsaved;
1645 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1646 struct compat_timespec ts;
1650 if (copy_from_user(&ts, tsp, sizeof(ts)))
1653 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1658 if (sigsetsize != sizeof(compat_sigset_t))
1660 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1662 sigset_from_compat(&ksigmask, &ss32);
1664 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1665 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1670 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1671 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1672 timeout += ts.tv_sec * (unsigned long)HZ;
1676 ts.tv_sec -= MAX_SELECT_SECONDS;
1677 timeout = MAX_SELECT_SECONDS * HZ;
1681 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1683 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1686 struct compat_timespec rts;
1688 if (current->personality & STICKY_TIMEOUTS)
1691 rts.tv_sec = timeout / HZ;
1692 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1693 if (rts.tv_nsec >= NSEC_PER_SEC) {
1695 rts.tv_nsec -= NSEC_PER_SEC;
1697 if (compat_timespec_compare(&rts, &ts) >= 0)
1699 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1702 * If an application puts its timeval in read-only
1703 * memory, we don't want the Linux-specific update to
1704 * the timeval to cause a fault after the select has
1705 * completed successfully. However, because we're not
1706 * updating the timeval, we can't restart the system
1709 if (ret == -ERESTARTNOHAND)
1714 if (ret == -ERESTARTNOHAND) {
1716 * Don't restore the signal mask yet. Let do_signal() deliver
1717 * the signal on the way back to userspace, before the signal
1721 memcpy(¤t->saved_sigmask, &sigsaved,
1723 set_restore_sigmask();
1726 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1731 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1732 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1733 struct compat_timespec __user *tsp, void __user *sig)
1735 compat_size_t sigsetsize = 0;
1736 compat_uptr_t up = 0;
1739 if (!access_ok(VERIFY_READ, sig,
1740 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1741 __get_user(up, (compat_uptr_t __user *)sig) ||
1742 __get_user(sigsetsize,
1743 (compat_size_t __user *)(sig+sizeof(up))))
1746 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1750 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1751 unsigned int nfds, struct compat_timespec __user *tsp,
1752 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1754 compat_sigset_t ss32;
1755 sigset_t ksigmask, sigsaved;
1756 struct compat_timespec ts;
1761 if (copy_from_user(&ts, tsp, sizeof(ts)))
1764 /* We assume that ts.tv_sec is always lower than
1765 the number of seconds that can be expressed in
1766 an s64. Otherwise the compiler bitches at us */
1767 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1768 timeout += ts.tv_sec * HZ;
1772 if (sigsetsize != sizeof(compat_sigset_t))
1774 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1776 sigset_from_compat(&ksigmask, &ss32);
1778 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1779 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1782 ret = do_sys_poll(ufds, nfds, &timeout);
1784 /* We can restart this syscall, usually */
1785 if (ret == -EINTR) {
1787 * Don't restore the signal mask yet. Let do_signal() deliver
1788 * the signal on the way back to userspace, before the signal
1792 memcpy(¤t->saved_sigmask, &sigsaved,
1794 set_restore_sigmask();
1796 ret = -ERESTARTNOHAND;
1798 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1800 if (tsp && timeout >= 0) {
1801 struct compat_timespec rts;
1803 if (current->personality & STICKY_TIMEOUTS)
1805 /* Yes, we know it's actually an s64, but it's also positive. */
1806 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1808 rts.tv_sec = timeout;
1809 if (compat_timespec_compare(&rts, &ts) >= 0)
1811 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1814 * If an application puts its timeval in read-only
1815 * memory, we don't want the Linux-specific update to
1816 * the timeval to cause a fault after the select has
1817 * completed successfully. However, because we're not
1818 * updating the timeval, we can't restart the system
1821 if (ret == -ERESTARTNOHAND && timeout >= 0)
1828 #endif /* HAVE_SET_RESTORE_SIGMASK */
1830 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1831 /* Stuff for NFS server syscalls... */
1832 struct compat_nfsctl_svc {
1837 struct compat_nfsctl_client {
1838 s8 cl32_ident[NFSCLNT_IDMAX+1];
1840 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1843 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1846 struct compat_nfsctl_export {
1847 char ex32_client[NFSCLNT_IDMAX+1];
1848 char ex32_path[NFS_MAXPATHLEN+1];
1849 compat_dev_t ex32_dev;
1850 compat_ino_t ex32_ino;
1851 compat_int_t ex32_flags;
1852 __compat_uid_t ex32_anon_uid;
1853 __compat_gid_t ex32_anon_gid;
1856 struct compat_nfsctl_fdparm {
1857 struct sockaddr gd32_addr;
1858 s8 gd32_path[NFS_MAXPATHLEN+1];
1859 compat_int_t gd32_version;
1862 struct compat_nfsctl_fsparm {
1863 struct sockaddr gd32_addr;
1864 s8 gd32_path[NFS_MAXPATHLEN+1];
1865 compat_int_t gd32_maxlen;
1868 struct compat_nfsctl_arg {
1869 compat_int_t ca32_version; /* safeguard */
1871 struct compat_nfsctl_svc u32_svc;
1872 struct compat_nfsctl_client u32_client;
1873 struct compat_nfsctl_export u32_export;
1874 struct compat_nfsctl_fdparm u32_getfd;
1875 struct compat_nfsctl_fsparm u32_getfs;
1877 #define ca32_svc u.u32_svc
1878 #define ca32_client u.u32_client
1879 #define ca32_export u.u32_export
1880 #define ca32_getfd u.u32_getfd
1881 #define ca32_getfs u.u32_getfs
1884 union compat_nfsctl_res {
1885 __u8 cr32_getfh[NFS_FHSIZE];
1886 struct knfsd_fh cr32_getfs;
1889 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1890 struct compat_nfsctl_arg __user *arg)
1892 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1893 get_user(karg->ca_version, &arg->ca32_version) ||
1894 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1895 __get_user(karg->ca_svc.svc_nthreads,
1896 &arg->ca32_svc.svc32_nthreads))
1901 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1902 struct compat_nfsctl_arg __user *arg)
1904 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1905 sizeof(arg->ca32_client)) ||
1906 get_user(karg->ca_version, &arg->ca32_version) ||
1907 __copy_from_user(&karg->ca_client.cl_ident[0],
1908 &arg->ca32_client.cl32_ident[0],
1910 __get_user(karg->ca_client.cl_naddr,
1911 &arg->ca32_client.cl32_naddr) ||
1912 __copy_from_user(&karg->ca_client.cl_addrlist[0],
1913 &arg->ca32_client.cl32_addrlist[0],
1914 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
1915 __get_user(karg->ca_client.cl_fhkeytype,
1916 &arg->ca32_client.cl32_fhkeytype) ||
1917 __get_user(karg->ca_client.cl_fhkeylen,
1918 &arg->ca32_client.cl32_fhkeylen) ||
1919 __copy_from_user(&karg->ca_client.cl_fhkey[0],
1920 &arg->ca32_client.cl32_fhkey[0],
1927 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
1928 struct compat_nfsctl_arg __user *arg)
1930 if (!access_ok(VERIFY_READ, &arg->ca32_export,
1931 sizeof(arg->ca32_export)) ||
1932 get_user(karg->ca_version, &arg->ca32_version) ||
1933 __copy_from_user(&karg->ca_export.ex_client[0],
1934 &arg->ca32_export.ex32_client[0],
1936 __copy_from_user(&karg->ca_export.ex_path[0],
1937 &arg->ca32_export.ex32_path[0],
1939 __get_user(karg->ca_export.ex_dev,
1940 &arg->ca32_export.ex32_dev) ||
1941 __get_user(karg->ca_export.ex_ino,
1942 &arg->ca32_export.ex32_ino) ||
1943 __get_user(karg->ca_export.ex_flags,
1944 &arg->ca32_export.ex32_flags) ||
1945 __get_user(karg->ca_export.ex_anon_uid,
1946 &arg->ca32_export.ex32_anon_uid) ||
1947 __get_user(karg->ca_export.ex_anon_gid,
1948 &arg->ca32_export.ex32_anon_gid))
1950 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1951 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1956 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
1957 struct compat_nfsctl_arg __user *arg)
1959 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
1960 sizeof(arg->ca32_getfd)) ||
1961 get_user(karg->ca_version, &arg->ca32_version) ||
1962 __copy_from_user(&karg->ca_getfd.gd_addr,
1963 &arg->ca32_getfd.gd32_addr,
1964 (sizeof(struct sockaddr))) ||
1965 __copy_from_user(&karg->ca_getfd.gd_path,
1966 &arg->ca32_getfd.gd32_path,
1967 (NFS_MAXPATHLEN+1)) ||
1968 __get_user(karg->ca_getfd.gd_version,
1969 &arg->ca32_getfd.gd32_version))
1975 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
1976 struct compat_nfsctl_arg __user *arg)
1978 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
1979 get_user(karg->ca_version, &arg->ca32_version) ||
1980 __copy_from_user(&karg->ca_getfs.gd_addr,
1981 &arg->ca32_getfs.gd32_addr,
1982 (sizeof(struct sockaddr))) ||
1983 __copy_from_user(&karg->ca_getfs.gd_path,
1984 &arg->ca32_getfs.gd32_path,
1985 (NFS_MAXPATHLEN+1)) ||
1986 __get_user(karg->ca_getfs.gd_maxlen,
1987 &arg->ca32_getfs.gd32_maxlen))
1993 /* This really doesn't need translations, we are only passing
1994 * back a union which contains opaque nfs file handle data.
1996 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
1997 union compat_nfsctl_res __user *res)
2001 err = copy_to_user(res, kres, sizeof(*res));
2003 return (err) ? -EFAULT : 0;
2006 asmlinkage long compat_sys_nfsservctl(int cmd,
2007 struct compat_nfsctl_arg __user *arg,
2008 union compat_nfsctl_res __user *res)
2010 struct nfsctl_arg *karg;
2011 union nfsctl_res *kres;
2015 karg = kmalloc(sizeof(*karg), GFP_USER);
2016 kres = kmalloc(sizeof(*kres), GFP_USER);
2017 if(!karg || !kres) {
2024 err = compat_nfs_svc_trans(karg, arg);
2027 case NFSCTL_ADDCLIENT:
2028 err = compat_nfs_clnt_trans(karg, arg);
2031 case NFSCTL_DELCLIENT:
2032 err = compat_nfs_clnt_trans(karg, arg);
2036 case NFSCTL_UNEXPORT:
2037 err = compat_nfs_exp_trans(karg, arg);
2041 err = compat_nfs_getfd_trans(karg, arg);
2045 err = compat_nfs_getfs_trans(karg, arg);
2058 /* The __user pointer casts are valid because of the set_fs() */
2059 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2065 if((cmd == NFSCTL_GETFD) ||
2066 (cmd == NFSCTL_GETFS))
2067 err = compat_nfs_getfh_res_trans(kres, res);
2075 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2077 return sys_ni_syscall();
2083 #ifdef HAVE_SET_RESTORE_SIGMASK
2084 asmlinkage long compat_sys_epoll_pwait(int epfd,
2085 struct compat_epoll_event __user *events,
2086 int maxevents, int timeout,
2087 const compat_sigset_t __user *sigmask,
2088 compat_size_t sigsetsize)
2091 compat_sigset_t csigmask;
2092 sigset_t ksigmask, sigsaved;
2095 * If the caller wants a certain signal mask to be set during the wait,
2099 if (sigsetsize != sizeof(compat_sigset_t))
2101 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2103 sigset_from_compat(&ksigmask, &csigmask);
2104 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2105 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2108 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2111 * If we changed the signal mask, we need to restore the original one.
2112 * In case we've got a signal while waiting, we do not restore the
2113 * signal mask yet, and we allow do_signal() to deliver the signal on
2114 * the way back to userspace, before the signal mask is restored.
2117 if (err == -EINTR) {
2118 memcpy(¤t->saved_sigmask, &sigsaved,
2120 set_restore_sigmask();
2122 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2127 #endif /* HAVE_SET_RESTORE_SIGMASK */
2129 #endif /* CONFIG_EPOLL */
2131 #ifdef CONFIG_SIGNALFD
2133 asmlinkage long compat_sys_signalfd(int ufd,
2134 const compat_sigset_t __user *sigmask,
2135 compat_size_t sigsetsize)
2137 compat_sigset_t ss32;
2139 sigset_t __user *ksigmask;
2141 if (sigsetsize != sizeof(compat_sigset_t))
2143 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2145 sigset_from_compat(&tmp, &ss32);
2146 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2147 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2150 return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
2153 #endif /* CONFIG_SIGNALFD */
2155 #ifdef CONFIG_TIMERFD
2157 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2158 const struct compat_itimerspec __user *utmr,
2159 struct compat_itimerspec __user *otmr)
2162 struct itimerspec t;
2163 struct itimerspec __user *ut;
2165 if (get_compat_itimerspec(&t, utmr))
2167 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2168 if (copy_to_user(&ut[0], &t, sizeof(t)))
2170 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2172 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2173 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2178 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2179 struct compat_itimerspec __user *otmr)
2182 struct itimerspec t;
2183 struct itimerspec __user *ut;
2185 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2186 error = sys_timerfd_gettime(ufd, ut);
2188 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2189 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2194 #endif /* CONFIG_TIMERFD */