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/poll.h>
51 #include <linux/eventpoll.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(char __user *filename, struct compat_utimbuf __user *t)
83 if (get_user(tv[0].tv_sec, &t->actime) ||
84 get_user(tv[1].tv_sec, &t->modtime))
89 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
92 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
97 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
98 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
99 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
100 get_user(tv[1].tv_usec, &t[1].tv_usec))
103 return do_utimes(dfd, filename, t ? tv : NULL);
106 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
108 return compat_sys_futimesat(AT_FDCWD, filename, t);
111 asmlinkage long compat_sys_newstat(char __user * filename,
112 struct compat_stat __user *statbuf)
115 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
118 error = cp_compat_stat(&stat, statbuf);
122 asmlinkage long compat_sys_newlstat(char __user * filename,
123 struct compat_stat __user *statbuf)
126 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
129 error = cp_compat_stat(&stat, statbuf);
133 #ifndef __ARCH_WANT_STAT64
134 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
135 struct compat_stat __user *statbuf, int flag)
140 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
143 if (flag & AT_SYMLINK_NOFOLLOW)
144 error = vfs_lstat_fd(dfd, filename, &stat);
146 error = vfs_stat_fd(dfd, filename, &stat);
149 error = cp_compat_stat(&stat, statbuf);
156 asmlinkage long compat_sys_newfstat(unsigned int fd,
157 struct compat_stat __user * statbuf)
160 int error = vfs_fstat(fd, &stat);
163 error = cp_compat_stat(&stat, statbuf);
167 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
170 if (sizeof ubuf->f_blocks == 4) {
171 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
172 0xffffffff00000000ULL)
174 /* f_files and f_ffree may be -1; it's okay
175 * to stuff that into 32 bits */
176 if (kbuf->f_files != 0xffffffffffffffffULL
177 && (kbuf->f_files & 0xffffffff00000000ULL))
179 if (kbuf->f_ffree != 0xffffffffffffffffULL
180 && (kbuf->f_ffree & 0xffffffff00000000ULL))
183 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
184 __put_user(kbuf->f_type, &ubuf->f_type) ||
185 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
186 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
187 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
188 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
189 __put_user(kbuf->f_files, &ubuf->f_files) ||
190 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
191 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
192 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
193 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
194 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
195 __put_user(0, &ubuf->f_spare[0]) ||
196 __put_user(0, &ubuf->f_spare[1]) ||
197 __put_user(0, &ubuf->f_spare[2]) ||
198 __put_user(0, &ubuf->f_spare[3]) ||
199 __put_user(0, &ubuf->f_spare[4]))
205 * The following statfs calls are copies of code from fs/open.c and
206 * should be checked against those from time to time
208 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
213 error = user_path_walk(path, &nd);
216 error = vfs_statfs(nd.dentry, &tmp);
218 error = put_compat_statfs(buf, &tmp);
224 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
234 error = vfs_statfs(file->f_path.dentry, &tmp);
236 error = put_compat_statfs(buf, &tmp);
242 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
244 if (sizeof ubuf->f_blocks == 4) {
245 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
246 0xffffffff00000000ULL)
248 /* f_files and f_ffree may be -1; it's okay
249 * to stuff that into 32 bits */
250 if (kbuf->f_files != 0xffffffffffffffffULL
251 && (kbuf->f_files & 0xffffffff00000000ULL))
253 if (kbuf->f_ffree != 0xffffffffffffffffULL
254 && (kbuf->f_ffree & 0xffffffff00000000ULL))
257 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
258 __put_user(kbuf->f_type, &ubuf->f_type) ||
259 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
260 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
261 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
262 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
263 __put_user(kbuf->f_files, &ubuf->f_files) ||
264 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
265 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
266 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
267 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
268 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
273 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
278 if (sz != sizeof(*buf))
281 error = user_path_walk(path, &nd);
284 error = vfs_statfs(nd.dentry, &tmp);
286 error = put_compat_statfs64(buf, &tmp);
292 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
298 if (sz != sizeof(*buf))
305 error = vfs_statfs(file->f_path.dentry, &tmp);
307 error = put_compat_statfs64(buf, &tmp);
313 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
315 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
316 __get_user(kfl->l_type, &ufl->l_type) ||
317 __get_user(kfl->l_whence, &ufl->l_whence) ||
318 __get_user(kfl->l_start, &ufl->l_start) ||
319 __get_user(kfl->l_len, &ufl->l_len) ||
320 __get_user(kfl->l_pid, &ufl->l_pid))
325 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
327 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
328 __put_user(kfl->l_type, &ufl->l_type) ||
329 __put_user(kfl->l_whence, &ufl->l_whence) ||
330 __put_user(kfl->l_start, &ufl->l_start) ||
331 __put_user(kfl->l_len, &ufl->l_len) ||
332 __put_user(kfl->l_pid, &ufl->l_pid))
337 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
338 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
340 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
341 __get_user(kfl->l_type, &ufl->l_type) ||
342 __get_user(kfl->l_whence, &ufl->l_whence) ||
343 __get_user(kfl->l_start, &ufl->l_start) ||
344 __get_user(kfl->l_len, &ufl->l_len) ||
345 __get_user(kfl->l_pid, &ufl->l_pid))
351 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
352 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
354 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
355 __put_user(kfl->l_type, &ufl->l_type) ||
356 __put_user(kfl->l_whence, &ufl->l_whence) ||
357 __put_user(kfl->l_start, &ufl->l_start) ||
358 __put_user(kfl->l_len, &ufl->l_len) ||
359 __put_user(kfl->l_pid, &ufl->l_pid))
365 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
376 ret = get_compat_flock(&f, compat_ptr(arg));
381 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
383 if (cmd == F_GETLK && ret == 0) {
384 /* GETLK was successfule and we need to return the data...
385 * but it needs to fit in the compat structure.
386 * l_start shouldn't be too big, unless the original
387 * start + end is greater than COMPAT_OFF_T_MAX, in which
388 * case the app was asking for trouble, so we return
389 * -EOVERFLOW in that case.
390 * l_len could be too big, in which case we just truncate it,
391 * and only allow the app to see that part of the conflicting
392 * lock that might make sense to it anyway
395 if (f.l_start > COMPAT_OFF_T_MAX)
397 if (f.l_len > COMPAT_OFF_T_MAX)
398 f.l_len = COMPAT_OFF_T_MAX;
400 ret = put_compat_flock(&f, compat_ptr(arg));
407 ret = get_compat_flock64(&f, compat_ptr(arg));
412 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
413 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
416 if (cmd == F_GETLK64 && ret == 0) {
417 /* need to return lock information - see above for commentary */
418 if (f.l_start > COMPAT_LOFF_T_MAX)
420 if (f.l_len > COMPAT_LOFF_T_MAX)
421 f.l_len = COMPAT_LOFF_T_MAX;
423 ret = put_compat_flock64(&f, compat_ptr(arg));
428 ret = sys_fcntl(fd, cmd, arg);
434 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
437 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
439 return compat_sys_fcntl64(fd, cmd, arg);
443 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
448 mm_segment_t oldfs = get_fs();
449 if (unlikely(get_user(ctx64, ctx32p)))
453 /* The __user pointer cast is valid because of the set_fs() */
454 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
456 /* truncating is ok because it's a user address */
458 ret = put_user((u32) ctx64, ctx32p);
463 compat_sys_io_getevents(aio_context_t ctx_id,
464 unsigned long min_nr,
466 struct io_event __user *events,
467 struct compat_timespec __user *timeout)
471 struct timespec __user *ut = NULL;
474 if (unlikely(!access_ok(VERIFY_WRITE, events,
475 nr * sizeof(struct io_event))))
478 if (get_compat_timespec(&t, timeout))
481 ut = compat_alloc_user_space(sizeof(*ut));
482 if (copy_to_user(ut, &t, sizeof(t)) )
485 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
491 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
496 for (i = 0; i < nr; ++i) {
497 if (get_user(uptr, ptr32 + i))
499 if (put_user(compat_ptr(uptr), ptr64 + i))
505 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
508 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
510 struct iocb __user * __user *iocb64;
513 if (unlikely(nr < 0))
516 if (nr > MAX_AIO_SUBMITS)
517 nr = MAX_AIO_SUBMITS;
519 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
520 ret = copy_iocb(nr, iocb, iocb64);
522 ret = sys_io_submit(ctx_id, nr, iocb64);
526 struct compat_ncp_mount_data {
527 compat_int_t version;
528 compat_uint_t ncp_fd;
529 __compat_uid_t mounted_uid;
530 compat_pid_t wdog_pid;
531 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
532 compat_uint_t time_out;
533 compat_uint_t retry_count;
537 compat_mode_t file_mode;
538 compat_mode_t dir_mode;
541 struct compat_ncp_mount_data_v4 {
542 compat_int_t version;
543 compat_ulong_t flags;
544 compat_ulong_t mounted_uid;
545 compat_long_t wdog_pid;
546 compat_uint_t ncp_fd;
547 compat_uint_t time_out;
548 compat_uint_t retry_count;
551 compat_ulong_t file_mode;
552 compat_ulong_t dir_mode;
555 static void *do_ncp_super_data_conv(void *raw_data)
557 int version = *(unsigned int *)raw_data;
560 struct compat_ncp_mount_data *c_n = raw_data;
561 struct ncp_mount_data *n = raw_data;
563 n->dir_mode = c_n->dir_mode;
564 n->file_mode = c_n->file_mode;
567 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
568 n->wdog_pid = c_n->wdog_pid;
569 n->mounted_uid = c_n->mounted_uid;
570 } else if (version == 4) {
571 struct compat_ncp_mount_data_v4 *c_n = raw_data;
572 struct ncp_mount_data_v4 *n = raw_data;
574 n->dir_mode = c_n->dir_mode;
575 n->file_mode = c_n->file_mode;
578 n->retry_count = c_n->retry_count;
579 n->time_out = c_n->time_out;
580 n->ncp_fd = c_n->ncp_fd;
581 n->wdog_pid = c_n->wdog_pid;
582 n->mounted_uid = c_n->mounted_uid;
583 n->flags = c_n->flags;
584 } else if (version != 5) {
591 struct compat_smb_mount_data {
592 compat_int_t version;
593 __compat_uid_t mounted_uid;
596 compat_mode_t file_mode;
597 compat_mode_t dir_mode;
600 static void *do_smb_super_data_conv(void *raw_data)
602 struct smb_mount_data *s = raw_data;
603 struct compat_smb_mount_data *c_s = raw_data;
605 if (c_s->version != SMB_MOUNT_OLDVERSION)
607 s->dir_mode = c_s->dir_mode;
608 s->file_mode = c_s->file_mode;
611 s->mounted_uid = c_s->mounted_uid;
616 struct compat_nfs_string {
621 static inline void compat_nfs_string(struct nfs_string *dst,
622 struct compat_nfs_string *src)
624 dst->data = compat_ptr(src->data);
628 struct compat_nfs4_mount_data_v1 {
629 compat_int_t version;
634 compat_int_t retrans;
635 compat_int_t acregmin;
636 compat_int_t acregmax;
637 compat_int_t acdirmin;
638 compat_int_t acdirmax;
639 struct compat_nfs_string client_addr;
640 struct compat_nfs_string mnt_path;
641 struct compat_nfs_string hostname;
642 compat_uint_t host_addrlen;
643 compat_uptr_t host_addr;
645 compat_int_t auth_flavourlen;
646 compat_uptr_t auth_flavours;
649 static int do_nfs4_super_data_conv(void *raw_data)
651 int version = *(compat_uint_t *) raw_data;
654 struct compat_nfs4_mount_data_v1 *raw = raw_data;
655 struct nfs4_mount_data *real = raw_data;
657 /* copy the fields backwards */
658 real->auth_flavours = compat_ptr(raw->auth_flavours);
659 real->auth_flavourlen = raw->auth_flavourlen;
660 real->proto = raw->proto;
661 real->host_addr = compat_ptr(raw->host_addr);
662 real->host_addrlen = raw->host_addrlen;
663 compat_nfs_string(&real->hostname, &raw->hostname);
664 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
665 compat_nfs_string(&real->client_addr, &raw->client_addr);
666 real->acdirmax = raw->acdirmax;
667 real->acdirmin = raw->acdirmin;
668 real->acregmax = raw->acregmax;
669 real->acregmin = raw->acregmin;
670 real->retrans = raw->retrans;
671 real->timeo = raw->timeo;
672 real->wsize = raw->wsize;
673 real->rsize = raw->rsize;
674 real->flags = raw->flags;
675 real->version = raw->version;
684 #define SMBFS_NAME "smbfs"
685 #define NCPFS_NAME "ncpfs"
686 #define NFS4_NAME "nfs4"
688 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
689 char __user * type, unsigned long flags,
692 unsigned long type_page;
693 unsigned long data_page;
694 unsigned long dev_page;
698 retval = copy_mount_options (type, &type_page);
702 dir_page = getname(dir_name);
703 retval = PTR_ERR(dir_page);
704 if (IS_ERR(dir_page))
707 retval = copy_mount_options (dev_name, &dev_page);
711 retval = copy_mount_options (data, &data_page);
717 if (type_page && data_page) {
718 if (!strcmp((char *)type_page, SMBFS_NAME)) {
719 do_smb_super_data_conv((void *)data_page);
720 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
721 do_ncp_super_data_conv((void *)data_page);
722 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
723 if (do_nfs4_super_data_conv((void *) data_page))
729 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
730 flags, (void*)data_page);
734 free_page(data_page);
740 free_page(type_page);
745 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
747 struct compat_old_linux_dirent {
748 compat_ulong_t d_ino;
749 compat_ulong_t d_offset;
750 unsigned short d_namlen;
754 struct compat_readdir_callback {
755 struct compat_old_linux_dirent __user *dirent;
759 static int compat_fillonedir(void *__buf, const char *name, int namlen,
760 loff_t offset, u64 ino, unsigned int d_type)
762 struct compat_readdir_callback *buf = __buf;
763 struct compat_old_linux_dirent __user *dirent;
764 compat_ulong_t d_ino;
769 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
772 dirent = buf->dirent;
773 if (!access_ok(VERIFY_WRITE, dirent,
774 (unsigned long)(dirent->d_name + namlen + 1) -
775 (unsigned long)dirent))
777 if ( __put_user(d_ino, &dirent->d_ino) ||
778 __put_user(offset, &dirent->d_offset) ||
779 __put_user(namlen, &dirent->d_namlen) ||
780 __copy_to_user(dirent->d_name, name, namlen) ||
781 __put_user(0, dirent->d_name + namlen))
785 buf->result = -EFAULT;
789 asmlinkage long compat_sys_old_readdir(unsigned int fd,
790 struct compat_old_linux_dirent __user *dirent, unsigned int count)
794 struct compat_readdir_callback buf;
804 error = vfs_readdir(file, compat_fillonedir, &buf);
813 struct compat_linux_dirent {
814 compat_ulong_t d_ino;
815 compat_ulong_t d_off;
816 unsigned short d_reclen;
820 struct compat_getdents_callback {
821 struct compat_linux_dirent __user *current_dir;
822 struct compat_linux_dirent __user *previous;
827 static int compat_filldir(void *__buf, const char *name, int namlen,
828 loff_t offset, u64 ino, unsigned int d_type)
830 struct compat_linux_dirent __user * dirent;
831 struct compat_getdents_callback *buf = __buf;
832 compat_ulong_t d_ino;
833 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
835 buf->error = -EINVAL; /* only used if we fail.. */
836 if (reclen > buf->count)
839 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
841 dirent = buf->previous;
843 if (__put_user(offset, &dirent->d_off))
846 dirent = buf->current_dir;
847 if (__put_user(d_ino, &dirent->d_ino))
849 if (__put_user(reclen, &dirent->d_reclen))
851 if (copy_to_user(dirent->d_name, name, namlen))
853 if (__put_user(0, dirent->d_name + namlen))
855 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
857 buf->previous = dirent;
858 dirent = (void __user *)dirent + reclen;
859 buf->current_dir = dirent;
860 buf->count -= reclen;
863 buf->error = -EFAULT;
867 asmlinkage long compat_sys_getdents(unsigned int fd,
868 struct compat_linux_dirent __user *dirent, unsigned int count)
871 struct compat_linux_dirent __user * lastdirent;
872 struct compat_getdents_callback buf;
876 if (!access_ok(VERIFY_WRITE, dirent, count))
884 buf.current_dir = dirent;
889 error = vfs_readdir(file, compat_filldir, &buf);
893 lastdirent = buf.previous;
895 if (put_user(file->f_pos, &lastdirent->d_off))
898 error = count - buf.count;
907 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
909 struct compat_getdents_callback64 {
910 struct linux_dirent64 __user *current_dir;
911 struct linux_dirent64 __user *previous;
916 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
917 u64 ino, unsigned int d_type)
919 struct linux_dirent64 __user *dirent;
920 struct compat_getdents_callback64 *buf = __buf;
921 int jj = NAME_OFFSET(dirent);
922 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
925 buf->error = -EINVAL; /* only used if we fail.. */
926 if (reclen > buf->count)
928 dirent = buf->previous;
931 if (__put_user_unaligned(offset, &dirent->d_off))
934 dirent = buf->current_dir;
935 if (__put_user_unaligned(ino, &dirent->d_ino))
938 if (__put_user_unaligned(off, &dirent->d_off))
940 if (__put_user(reclen, &dirent->d_reclen))
942 if (__put_user(d_type, &dirent->d_type))
944 if (copy_to_user(dirent->d_name, name, namlen))
946 if (__put_user(0, dirent->d_name + namlen))
948 buf->previous = dirent;
949 dirent = (void __user *)dirent + reclen;
950 buf->current_dir = dirent;
951 buf->count -= reclen;
954 buf->error = -EFAULT;
958 asmlinkage long compat_sys_getdents64(unsigned int fd,
959 struct linux_dirent64 __user * dirent, unsigned int count)
962 struct linux_dirent64 __user * lastdirent;
963 struct compat_getdents_callback64 buf;
967 if (!access_ok(VERIFY_WRITE, dirent, count))
975 buf.current_dir = dirent;
980 error = vfs_readdir(file, compat_filldir64, &buf);
984 lastdirent = buf.previous;
986 typeof(lastdirent->d_off) d_off = file->f_pos;
988 if (__put_user_unaligned(d_off, &lastdirent->d_off))
990 error = count - buf.count;
998 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1000 static ssize_t compat_do_readv_writev(int type, struct file *file,
1001 const struct compat_iovec __user *uvector,
1002 unsigned long nr_segs, loff_t *pos)
1004 compat_ssize_t tot_len;
1005 struct iovec iovstack[UIO_FASTIOV];
1006 struct iovec *iov=iovstack, *vector;
1013 * SuS says "The readv() function *may* fail if the iovcnt argument
1014 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1015 * traditionally returned zero for zero segments, so...
1022 * First get the "struct iovec" from user memory and
1023 * verify all the pointers
1026 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1030 if (nr_segs > UIO_FASTIOV) {
1032 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1037 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1041 * Single unix specification:
1042 * We should -EINVAL if an element length is not >= 0 and fitting an
1043 * ssize_t. The total length is fitting an ssize_t
1045 * Be careful here because iov_len is a size_t not an ssize_t
1050 for (seg = 0 ; seg < nr_segs; seg++) {
1051 compat_ssize_t tmp = tot_len;
1055 if (__get_user(len, &uvector->iov_len) ||
1056 __get_user(buf, &uvector->iov_base)) {
1060 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1063 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1065 vector->iov_base = compat_ptr(buf);
1066 vector->iov_len = (compat_size_t) len;
1075 ret = rw_verify_area(type, file, pos, tot_len);
1079 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1085 fn = file->f_op->read;
1086 fnv = file->f_op->aio_read;
1088 fn = (io_fn_t)file->f_op->write;
1089 fnv = file->f_op->aio_write;
1093 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1096 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1099 if (iov != iovstack)
1101 if ((ret + (type == READ)) > 0) {
1102 struct dentry *dentry = file->f_path.dentry;
1104 fsnotify_access(dentry);
1106 fsnotify_modify(dentry);
1112 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1115 ssize_t ret = -EBADF;
1121 if (!(file->f_mode & FMODE_READ))
1125 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1128 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1136 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1139 ssize_t ret = -EBADF;
1144 if (!(file->f_mode & FMODE_WRITE))
1148 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1151 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1159 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1160 unsigned int nr_segs, unsigned int flags)
1163 struct iovec __user *iov;
1164 if (nr_segs > UIO_MAXIOV)
1166 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1167 for (i = 0; i < nr_segs; i++) {
1168 struct compat_iovec v;
1169 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1170 get_user(v.iov_len, &iov32[i].iov_len) ||
1171 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1172 put_user(v.iov_len, &iov[i].iov_len))
1175 return sys_vmsplice(fd, iov, nr_segs, flags);
1179 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1183 compat_sys_open(const char __user *filename, int flags, int mode)
1185 return do_sys_open(AT_FDCWD, filename, flags, mode);
1189 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1193 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1195 return do_sys_open(dfd, filename, flags, mode);
1199 * compat_count() counts the number of arguments/envelopes. It is basically
1200 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1201 * and envp pointers.
1203 static int compat_count(compat_uptr_t __user *argv, int max)
1211 if (get_user(p, argv))
1224 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1225 * except that it works with 32 bit argv and envp pointers.
1227 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1228 struct linux_binprm *bprm)
1230 struct page *kmapped_page = NULL;
1234 while (argc-- > 0) {
1239 if (get_user(str, argv+argc) ||
1240 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1245 if (bprm->p < len) {
1251 /* XXX: add architecture specific overflow check here. */
1256 int offset, bytes_to_copy;
1259 offset = pos % PAGE_SIZE;
1261 page = bprm->page[i];
1264 page = alloc_page(GFP_HIGHUSER);
1265 bprm->page[i] = page;
1273 if (page != kmapped_page) {
1275 kunmap(kmapped_page);
1276 kmapped_page = page;
1277 kaddr = kmap(kmapped_page);
1280 memset(kaddr, 0, offset);
1281 bytes_to_copy = PAGE_SIZE - offset;
1282 if (bytes_to_copy > len) {
1283 bytes_to_copy = len;
1285 memset(kaddr+offset+len, 0,
1286 PAGE_SIZE-offset-len);
1288 err = copy_from_user(kaddr+offset, compat_ptr(str),
1295 pos += bytes_to_copy;
1296 str += bytes_to_copy;
1297 len -= bytes_to_copy;
1303 kunmap(kmapped_page);
1309 #define free_arg_pages(bprm) do { } while (0)
1313 static inline void free_arg_pages(struct linux_binprm *bprm)
1317 for (i = 0; i < MAX_ARG_PAGES; i++) {
1319 __free_page(bprm->page[i]);
1320 bprm->page[i] = NULL;
1324 #endif /* CONFIG_MMU */
1327 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1328 * that it processes 32 bit argv and envp pointers.
1330 int compat_do_execve(char * filename,
1331 compat_uptr_t __user *argv,
1332 compat_uptr_t __user *envp,
1333 struct pt_regs * regs)
1335 struct linux_binprm *bprm;
1341 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1345 file = open_exec(filename);
1346 retval = PTR_ERR(file);
1352 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1354 bprm->filename = filename;
1355 bprm->interp = filename;
1356 bprm->mm = mm_alloc();
1361 retval = init_new_context(current, bprm->mm);
1365 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1366 if ((retval = bprm->argc) < 0)
1369 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1370 if ((retval = bprm->envc) < 0)
1373 retval = security_bprm_alloc(bprm);
1377 retval = prepare_binprm(bprm);
1381 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1385 bprm->exec = bprm->p;
1386 retval = compat_copy_strings(bprm->envc, envp, bprm);
1390 retval = compat_copy_strings(bprm->argc, argv, bprm);
1394 retval = search_binary_handler(bprm, regs);
1396 free_arg_pages(bprm);
1398 /* execve success */
1399 security_bprm_free(bprm);
1400 acct_update_integrals(current);
1406 /* Something went wrong, return the inode and free the argument pages*/
1407 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1408 struct page * page = bprm->page[i];
1414 security_bprm_free(bprm);
1422 allow_write_access(bprm->file);
1433 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1436 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1437 * 64-bit unsigned longs.
1440 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1441 unsigned long *fdset)
1443 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1447 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1454 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1457 *fdset++ = h << 32 | l;
1460 if (odd && __get_user(*fdset, ufdset))
1463 /* Tricky, must clear full unsigned long in the
1464 * kernel fdset at the end, this makes sure that
1467 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1473 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1474 unsigned long *fdset)
1477 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1488 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1493 if (odd && __put_user(*fdset, ufdset))
1500 * This is a virtual copy of sys_select from fs/select.c and probably
1501 * should be compared to it from time to time
1505 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1506 * like to be certain this leads to no problems. So I return
1507 * EINTR just for safety.
1509 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1510 * I'm trying ERESTARTNOHAND which restart only when you want to.
1512 #define MAX_SELECT_SECONDS \
1513 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1515 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1516 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1520 int size, max_fds, ret = -EINVAL;
1521 struct fdtable *fdt;
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
1540 size = FDS_BYTES(n);
1541 bits = kmalloc(6 * size, GFP_KERNEL);
1544 fds.in = (unsigned long *) bits;
1545 fds.out = (unsigned long *) (bits + size);
1546 fds.ex = (unsigned long *) (bits + 2*size);
1547 fds.res_in = (unsigned long *) (bits + 3*size);
1548 fds.res_out = (unsigned long *) (bits + 4*size);
1549 fds.res_ex = (unsigned long *) (bits + 5*size);
1551 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1552 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1553 (ret = compat_get_fd_set(n, exp, fds.ex)))
1555 zero_fd_set(n, fds.res_in);
1556 zero_fd_set(n, fds.res_out);
1557 zero_fd_set(n, fds.res_ex);
1559 ret = do_select(n, &fds, timeout);
1564 ret = -ERESTARTNOHAND;
1565 if (signal_pending(current))
1570 if (compat_set_fd_set(n, inp, fds.res_in) ||
1571 compat_set_fd_set(n, outp, fds.res_out) ||
1572 compat_set_fd_set(n, exp, fds.res_ex))
1580 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1581 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1582 struct compat_timeval __user *tvp)
1585 struct compat_timeval tv;
1589 if (copy_from_user(&tv, tvp, sizeof(tv)))
1592 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1595 /* Cast to u64 to make GCC stop complaining */
1596 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1597 timeout = -1; /* infinite */
1599 timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ);
1600 timeout += tv.tv_sec * HZ;
1604 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1607 struct compat_timeval rtv;
1609 if (current->personality & STICKY_TIMEOUTS)
1611 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1612 rtv.tv_sec = timeout;
1613 if (compat_timeval_compare(&rtv, &tv) >= 0)
1615 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1618 * If an application puts its timeval in read-only
1619 * memory, we don't want the Linux-specific update to
1620 * the timeval to cause a fault after the select has
1621 * completed successfully. However, because we're not
1622 * updating the timeval, we can't restart the system
1625 if (ret == -ERESTARTNOHAND)
1633 #ifdef TIF_RESTORE_SIGMASK
1634 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1635 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1636 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1637 compat_size_t sigsetsize)
1639 compat_sigset_t ss32;
1640 sigset_t ksigmask, sigsaved;
1641 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1642 struct compat_timespec ts;
1646 if (copy_from_user(&ts, tsp, sizeof(ts)))
1649 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1654 if (sigsetsize != sizeof(compat_sigset_t))
1656 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1658 sigset_from_compat(&ksigmask, &ss32);
1660 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1661 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1666 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1667 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1668 timeout += ts.tv_sec * (unsigned long)HZ;
1672 ts.tv_sec -= MAX_SELECT_SECONDS;
1673 timeout = MAX_SELECT_SECONDS * HZ;
1677 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1679 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1682 struct compat_timespec rts;
1684 if (current->personality & STICKY_TIMEOUTS)
1687 rts.tv_sec = timeout / HZ;
1688 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1689 if (rts.tv_nsec >= NSEC_PER_SEC) {
1691 rts.tv_nsec -= NSEC_PER_SEC;
1693 if (compat_timespec_compare(&rts, &ts) >= 0)
1695 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1698 * If an application puts its timeval in read-only
1699 * memory, we don't want the Linux-specific update to
1700 * the timeval to cause a fault after the select has
1701 * completed successfully. However, because we're not
1702 * updating the timeval, we can't restart the system
1705 if (ret == -ERESTARTNOHAND)
1710 if (ret == -ERESTARTNOHAND) {
1712 * Don't restore the signal mask yet. Let do_signal() deliver
1713 * the signal on the way back to userspace, before the signal
1717 memcpy(¤t->saved_sigmask, &sigsaved,
1719 set_thread_flag(TIF_RESTORE_SIGMASK);
1722 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1727 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1728 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1729 struct compat_timespec __user *tsp, void __user *sig)
1731 compat_size_t sigsetsize = 0;
1732 compat_uptr_t up = 0;
1735 if (!access_ok(VERIFY_READ, sig,
1736 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1737 __get_user(up, (compat_uptr_t __user *)sig) ||
1738 __get_user(sigsetsize,
1739 (compat_size_t __user *)(sig+sizeof(up))))
1742 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1746 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1747 unsigned int nfds, struct compat_timespec __user *tsp,
1748 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1750 compat_sigset_t ss32;
1751 sigset_t ksigmask, sigsaved;
1752 struct compat_timespec ts;
1757 if (copy_from_user(&ts, tsp, sizeof(ts)))
1760 /* We assume that ts.tv_sec is always lower than
1761 the number of seconds that can be expressed in
1762 an s64. Otherwise the compiler bitches at us */
1763 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1764 timeout += ts.tv_sec * HZ;
1768 if (sigsetsize != sizeof(compat_sigset_t))
1770 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1772 sigset_from_compat(&ksigmask, &ss32);
1774 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1775 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1778 ret = do_sys_poll(ufds, nfds, &timeout);
1780 /* We can restart this syscall, usually */
1781 if (ret == -EINTR) {
1783 * Don't restore the signal mask yet. Let do_signal() deliver
1784 * the signal on the way back to userspace, before the signal
1788 memcpy(¤t->saved_sigmask, &sigsaved,
1790 set_thread_flag(TIF_RESTORE_SIGMASK);
1792 ret = -ERESTARTNOHAND;
1794 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1796 if (tsp && timeout >= 0) {
1797 struct compat_timespec rts;
1799 if (current->personality & STICKY_TIMEOUTS)
1801 /* Yes, we know it's actually an s64, but it's also positive. */
1802 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1804 rts.tv_sec = timeout;
1805 if (compat_timespec_compare(&rts, &ts) >= 0)
1807 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1810 * If an application puts its timeval in read-only
1811 * memory, we don't want the Linux-specific update to
1812 * the timeval to cause a fault after the select has
1813 * completed successfully. However, because we're not
1814 * updating the timeval, we can't restart the system
1817 if (ret == -ERESTARTNOHAND && timeout >= 0)
1824 #endif /* TIF_RESTORE_SIGMASK */
1826 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1827 /* Stuff for NFS server syscalls... */
1828 struct compat_nfsctl_svc {
1833 struct compat_nfsctl_client {
1834 s8 cl32_ident[NFSCLNT_IDMAX+1];
1836 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1839 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1842 struct compat_nfsctl_export {
1843 char ex32_client[NFSCLNT_IDMAX+1];
1844 char ex32_path[NFS_MAXPATHLEN+1];
1845 compat_dev_t ex32_dev;
1846 compat_ino_t ex32_ino;
1847 compat_int_t ex32_flags;
1848 __compat_uid_t ex32_anon_uid;
1849 __compat_gid_t ex32_anon_gid;
1852 struct compat_nfsctl_fdparm {
1853 struct sockaddr gd32_addr;
1854 s8 gd32_path[NFS_MAXPATHLEN+1];
1855 compat_int_t gd32_version;
1858 struct compat_nfsctl_fsparm {
1859 struct sockaddr gd32_addr;
1860 s8 gd32_path[NFS_MAXPATHLEN+1];
1861 compat_int_t gd32_maxlen;
1864 struct compat_nfsctl_arg {
1865 compat_int_t ca32_version; /* safeguard */
1867 struct compat_nfsctl_svc u32_svc;
1868 struct compat_nfsctl_client u32_client;
1869 struct compat_nfsctl_export u32_export;
1870 struct compat_nfsctl_fdparm u32_getfd;
1871 struct compat_nfsctl_fsparm u32_getfs;
1873 #define ca32_svc u.u32_svc
1874 #define ca32_client u.u32_client
1875 #define ca32_export u.u32_export
1876 #define ca32_getfd u.u32_getfd
1877 #define ca32_getfs u.u32_getfs
1880 union compat_nfsctl_res {
1881 __u8 cr32_getfh[NFS_FHSIZE];
1882 struct knfsd_fh cr32_getfs;
1885 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1886 struct compat_nfsctl_arg __user *arg)
1888 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1889 get_user(karg->ca_version, &arg->ca32_version) ||
1890 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1891 __get_user(karg->ca_svc.svc_nthreads,
1892 &arg->ca32_svc.svc32_nthreads))
1897 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1898 struct compat_nfsctl_arg __user *arg)
1900 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1901 sizeof(arg->ca32_client)) ||
1902 get_user(karg->ca_version, &arg->ca32_version) ||
1903 __copy_from_user(&karg->ca_client.cl_ident[0],
1904 &arg->ca32_client.cl32_ident[0],
1906 __get_user(karg->ca_client.cl_naddr,
1907 &arg->ca32_client.cl32_naddr) ||
1908 __copy_from_user(&karg->ca_client.cl_addrlist[0],
1909 &arg->ca32_client.cl32_addrlist[0],
1910 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
1911 __get_user(karg->ca_client.cl_fhkeytype,
1912 &arg->ca32_client.cl32_fhkeytype) ||
1913 __get_user(karg->ca_client.cl_fhkeylen,
1914 &arg->ca32_client.cl32_fhkeylen) ||
1915 __copy_from_user(&karg->ca_client.cl_fhkey[0],
1916 &arg->ca32_client.cl32_fhkey[0],
1923 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
1924 struct compat_nfsctl_arg __user *arg)
1926 if (!access_ok(VERIFY_READ, &arg->ca32_export,
1927 sizeof(arg->ca32_export)) ||
1928 get_user(karg->ca_version, &arg->ca32_version) ||
1929 __copy_from_user(&karg->ca_export.ex_client[0],
1930 &arg->ca32_export.ex32_client[0],
1932 __copy_from_user(&karg->ca_export.ex_path[0],
1933 &arg->ca32_export.ex32_path[0],
1935 __get_user(karg->ca_export.ex_dev,
1936 &arg->ca32_export.ex32_dev) ||
1937 __get_user(karg->ca_export.ex_ino,
1938 &arg->ca32_export.ex32_ino) ||
1939 __get_user(karg->ca_export.ex_flags,
1940 &arg->ca32_export.ex32_flags) ||
1941 __get_user(karg->ca_export.ex_anon_uid,
1942 &arg->ca32_export.ex32_anon_uid) ||
1943 __get_user(karg->ca_export.ex_anon_gid,
1944 &arg->ca32_export.ex32_anon_gid))
1946 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1947 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1952 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
1953 struct compat_nfsctl_arg __user *arg)
1955 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
1956 sizeof(arg->ca32_getfd)) ||
1957 get_user(karg->ca_version, &arg->ca32_version) ||
1958 __copy_from_user(&karg->ca_getfd.gd_addr,
1959 &arg->ca32_getfd.gd32_addr,
1960 (sizeof(struct sockaddr))) ||
1961 __copy_from_user(&karg->ca_getfd.gd_path,
1962 &arg->ca32_getfd.gd32_path,
1963 (NFS_MAXPATHLEN+1)) ||
1964 __get_user(karg->ca_getfd.gd_version,
1965 &arg->ca32_getfd.gd32_version))
1971 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
1972 struct compat_nfsctl_arg __user *arg)
1974 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
1975 get_user(karg->ca_version, &arg->ca32_version) ||
1976 __copy_from_user(&karg->ca_getfs.gd_addr,
1977 &arg->ca32_getfs.gd32_addr,
1978 (sizeof(struct sockaddr))) ||
1979 __copy_from_user(&karg->ca_getfs.gd_path,
1980 &arg->ca32_getfs.gd32_path,
1981 (NFS_MAXPATHLEN+1)) ||
1982 __get_user(karg->ca_getfs.gd_maxlen,
1983 &arg->ca32_getfs.gd32_maxlen))
1989 /* This really doesn't need translations, we are only passing
1990 * back a union which contains opaque nfs file handle data.
1992 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
1993 union compat_nfsctl_res __user *res)
1997 err = copy_to_user(res, kres, sizeof(*res));
1999 return (err) ? -EFAULT : 0;
2002 asmlinkage long compat_sys_nfsservctl(int cmd,
2003 struct compat_nfsctl_arg __user *arg,
2004 union compat_nfsctl_res __user *res)
2006 struct nfsctl_arg *karg;
2007 union nfsctl_res *kres;
2011 karg = kmalloc(sizeof(*karg), GFP_USER);
2012 kres = kmalloc(sizeof(*kres), GFP_USER);
2013 if(!karg || !kres) {
2020 err = compat_nfs_svc_trans(karg, arg);
2023 case NFSCTL_ADDCLIENT:
2024 err = compat_nfs_clnt_trans(karg, arg);
2027 case NFSCTL_DELCLIENT:
2028 err = compat_nfs_clnt_trans(karg, arg);
2032 case NFSCTL_UNEXPORT:
2033 err = compat_nfs_exp_trans(karg, arg);
2037 err = compat_nfs_getfd_trans(karg, arg);
2041 err = compat_nfs_getfs_trans(karg, arg);
2054 /* The __user pointer casts are valid because of the set_fs() */
2055 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2061 if((cmd == NFSCTL_GETFD) ||
2062 (cmd == NFSCTL_GETFS))
2063 err = compat_nfs_getfh_res_trans(kres, res);
2071 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2073 return sys_ni_syscall();
2079 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2080 asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
2081 struct compat_epoll_event __user *event)
2084 struct compat_epoll_event user;
2085 struct epoll_event __user *kernel = NULL;
2088 if (copy_from_user(&user, event, sizeof(user)))
2090 kernel = compat_alloc_user_space(sizeof(struct epoll_event));
2091 err |= __put_user(user.events, &kernel->events);
2092 err |= __put_user(user.data, &kernel->data);
2095 return err ? err : sys_epoll_ctl(epfd, op, fd, kernel);
2099 asmlinkage long compat_sys_epoll_wait(int epfd,
2100 struct compat_epoll_event __user *events,
2101 int maxevents, int timeout)
2103 long i, ret, err = 0;
2104 struct epoll_event __user *kbuf;
2105 struct epoll_event ev;
2107 if ((maxevents <= 0) ||
2108 (maxevents > (INT_MAX / sizeof(struct epoll_event))))
2110 kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents);
2111 ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
2112 for (i = 0; i < ret; i++) {
2113 err |= __get_user(ev.events, &kbuf[i].events);
2114 err |= __get_user(ev.data, &kbuf[i].data);
2115 err |= __put_user(ev.events, &events->events);
2116 err |= __put_user_unaligned(ev.data, &events->data);
2120 return err ? -EFAULT: ret;
2122 #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */
2124 #ifdef TIF_RESTORE_SIGMASK
2125 asmlinkage long compat_sys_epoll_pwait(int epfd,
2126 struct compat_epoll_event __user *events,
2127 int maxevents, int timeout,
2128 const compat_sigset_t __user *sigmask,
2129 compat_size_t sigsetsize)
2132 compat_sigset_t csigmask;
2133 sigset_t ksigmask, sigsaved;
2136 * If the caller wants a certain signal mask to be set during the wait,
2140 if (sigsetsize != sizeof(compat_sigset_t))
2142 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2144 sigset_from_compat(&ksigmask, &csigmask);
2145 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2146 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2149 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2150 err = compat_sys_epoll_wait(epfd, events, maxevents, timeout);
2152 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2156 * If we changed the signal mask, we need to restore the original one.
2157 * In case we've got a signal while waiting, we do not restore the
2158 * signal mask yet, and we allow do_signal() to deliver the signal on
2159 * the way back to userspace, before the signal mask is restored.
2162 if (err == -EINTR) {
2163 memcpy(¤t->saved_sigmask, &sigsaved,
2165 set_thread_flag(TIF_RESTORE_SIGMASK);
2167 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2172 #endif /* TIF_RESTORE_SIGMASK */
2174 #endif /* CONFIG_EPOLL */