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.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.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;
712 #define SMBFS_NAME "smbfs"
713 #define NCPFS_NAME "ncpfs"
714 #define NFS4_NAME "nfs4"
716 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
717 char __user * type, unsigned long flags,
720 unsigned long type_page;
721 unsigned long data_page;
722 unsigned long dev_page;
726 retval = copy_mount_options (type, &type_page);
730 dir_page = getname(dir_name);
731 retval = PTR_ERR(dir_page);
732 if (IS_ERR(dir_page))
735 retval = copy_mount_options (dev_name, &dev_page);
739 retval = copy_mount_options (data, &data_page);
745 if (type_page && data_page) {
746 if (!strcmp((char *)type_page, SMBFS_NAME)) {
747 do_smb_super_data_conv((void *)data_page);
748 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
749 do_ncp_super_data_conv((void *)data_page);
750 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
751 if (do_nfs4_super_data_conv((void *) data_page))
757 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
758 flags, (void*)data_page);
762 free_page(data_page);
768 free_page(type_page);
773 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
775 struct compat_old_linux_dirent {
776 compat_ulong_t d_ino;
777 compat_ulong_t d_offset;
778 unsigned short d_namlen;
782 struct compat_readdir_callback {
783 struct compat_old_linux_dirent __user *dirent;
787 static int compat_fillonedir(void *__buf, const char *name, int namlen,
788 loff_t offset, u64 ino, unsigned int d_type)
790 struct compat_readdir_callback *buf = __buf;
791 struct compat_old_linux_dirent __user *dirent;
792 compat_ulong_t d_ino;
797 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
800 dirent = buf->dirent;
801 if (!access_ok(VERIFY_WRITE, dirent,
802 (unsigned long)(dirent->d_name + namlen + 1) -
803 (unsigned long)dirent))
805 if ( __put_user(d_ino, &dirent->d_ino) ||
806 __put_user(offset, &dirent->d_offset) ||
807 __put_user(namlen, &dirent->d_namlen) ||
808 __copy_to_user(dirent->d_name, name, namlen) ||
809 __put_user(0, dirent->d_name + namlen))
813 buf->result = -EFAULT;
817 asmlinkage long compat_sys_old_readdir(unsigned int fd,
818 struct compat_old_linux_dirent __user *dirent, unsigned int count)
822 struct compat_readdir_callback buf;
832 error = vfs_readdir(file, compat_fillonedir, &buf);
841 struct compat_linux_dirent {
842 compat_ulong_t d_ino;
843 compat_ulong_t d_off;
844 unsigned short d_reclen;
848 struct compat_getdents_callback {
849 struct compat_linux_dirent __user *current_dir;
850 struct compat_linux_dirent __user *previous;
855 static int compat_filldir(void *__buf, const char *name, int namlen,
856 loff_t offset, u64 ino, unsigned int d_type)
858 struct compat_linux_dirent __user * dirent;
859 struct compat_getdents_callback *buf = __buf;
860 compat_ulong_t d_ino;
861 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
863 buf->error = -EINVAL; /* only used if we fail.. */
864 if (reclen > buf->count)
867 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
869 dirent = buf->previous;
871 if (__put_user(offset, &dirent->d_off))
874 dirent = buf->current_dir;
875 if (__put_user(d_ino, &dirent->d_ino))
877 if (__put_user(reclen, &dirent->d_reclen))
879 if (copy_to_user(dirent->d_name, name, namlen))
881 if (__put_user(0, dirent->d_name + namlen))
883 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
885 buf->previous = dirent;
886 dirent = (void __user *)dirent + reclen;
887 buf->current_dir = dirent;
888 buf->count -= reclen;
891 buf->error = -EFAULT;
895 asmlinkage long compat_sys_getdents(unsigned int fd,
896 struct compat_linux_dirent __user *dirent, unsigned int count)
899 struct compat_linux_dirent __user * lastdirent;
900 struct compat_getdents_callback buf;
904 if (!access_ok(VERIFY_WRITE, dirent, count))
912 buf.current_dir = dirent;
917 error = vfs_readdir(file, compat_filldir, &buf);
921 lastdirent = buf.previous;
923 if (put_user(file->f_pos, &lastdirent->d_off))
926 error = count - buf.count;
935 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
937 struct compat_getdents_callback64 {
938 struct linux_dirent64 __user *current_dir;
939 struct linux_dirent64 __user *previous;
944 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
945 u64 ino, unsigned int d_type)
947 struct linux_dirent64 __user *dirent;
948 struct compat_getdents_callback64 *buf = __buf;
949 int jj = NAME_OFFSET(dirent);
950 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
953 buf->error = -EINVAL; /* only used if we fail.. */
954 if (reclen > buf->count)
956 dirent = buf->previous;
959 if (__put_user_unaligned(offset, &dirent->d_off))
962 dirent = buf->current_dir;
963 if (__put_user_unaligned(ino, &dirent->d_ino))
966 if (__put_user_unaligned(off, &dirent->d_off))
968 if (__put_user(reclen, &dirent->d_reclen))
970 if (__put_user(d_type, &dirent->d_type))
972 if (copy_to_user(dirent->d_name, name, namlen))
974 if (__put_user(0, dirent->d_name + namlen))
976 buf->previous = dirent;
977 dirent = (void __user *)dirent + reclen;
978 buf->current_dir = dirent;
979 buf->count -= reclen;
982 buf->error = -EFAULT;
986 asmlinkage long compat_sys_getdents64(unsigned int fd,
987 struct linux_dirent64 __user * dirent, unsigned int count)
990 struct linux_dirent64 __user * lastdirent;
991 struct compat_getdents_callback64 buf;
995 if (!access_ok(VERIFY_WRITE, dirent, count))
1003 buf.current_dir = dirent;
1004 buf.previous = NULL;
1008 error = vfs_readdir(file, compat_filldir64, &buf);
1012 lastdirent = buf.previous;
1014 typeof(lastdirent->d_off) d_off = file->f_pos;
1016 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1018 error = count - buf.count;
1026 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1028 static ssize_t compat_do_readv_writev(int type, struct file *file,
1029 const struct compat_iovec __user *uvector,
1030 unsigned long nr_segs, loff_t *pos)
1032 compat_ssize_t tot_len;
1033 struct iovec iovstack[UIO_FASTIOV];
1034 struct iovec *iov=iovstack, *vector;
1041 * SuS says "The readv() function *may* fail if the iovcnt argument
1042 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1043 * traditionally returned zero for zero segments, so...
1050 * First get the "struct iovec" from user memory and
1051 * verify all the pointers
1054 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1058 if (nr_segs > UIO_FASTIOV) {
1060 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1065 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1069 * Single unix specification:
1070 * We should -EINVAL if an element length is not >= 0 and fitting an
1071 * ssize_t. The total length is fitting an ssize_t
1073 * Be careful here because iov_len is a size_t not an ssize_t
1078 for (seg = 0 ; seg < nr_segs; seg++) {
1079 compat_ssize_t tmp = tot_len;
1083 if (__get_user(len, &uvector->iov_len) ||
1084 __get_user(buf, &uvector->iov_base)) {
1088 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1091 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1093 vector->iov_base = compat_ptr(buf);
1094 vector->iov_len = (compat_size_t) len;
1103 ret = rw_verify_area(type, file, pos, tot_len);
1109 fn = file->f_op->read;
1110 fnv = file->f_op->aio_read;
1112 fn = (io_fn_t)file->f_op->write;
1113 fnv = file->f_op->aio_write;
1117 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1120 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1123 if (iov != iovstack)
1125 if ((ret + (type == READ)) > 0) {
1126 struct dentry *dentry = file->f_path.dentry;
1128 fsnotify_access(dentry);
1130 fsnotify_modify(dentry);
1136 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1139 ssize_t ret = -EBADF;
1145 if (!(file->f_mode & FMODE_READ))
1149 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1152 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1160 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1163 ssize_t ret = -EBADF;
1168 if (!(file->f_mode & FMODE_WRITE))
1172 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1175 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1183 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1184 unsigned int nr_segs, unsigned int flags)
1187 struct iovec __user *iov;
1188 if (nr_segs > UIO_MAXIOV)
1190 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1191 for (i = 0; i < nr_segs; i++) {
1192 struct compat_iovec v;
1193 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1194 get_user(v.iov_len, &iov32[i].iov_len) ||
1195 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1196 put_user(v.iov_len, &iov[i].iov_len))
1199 return sys_vmsplice(fd, iov, nr_segs, flags);
1203 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1207 compat_sys_open(const char __user *filename, int flags, int mode)
1209 return do_sys_open(AT_FDCWD, filename, flags, mode);
1213 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1217 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1219 return do_sys_open(dfd, filename, flags, mode);
1223 * compat_count() counts the number of arguments/envelopes. It is basically
1224 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1225 * and envp pointers.
1227 static int compat_count(compat_uptr_t __user *argv, int max)
1235 if (get_user(p, argv))
1248 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1249 * except that it works with 32 bit argv and envp pointers.
1251 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1252 struct linux_binprm *bprm)
1254 struct page *kmapped_page = NULL;
1256 unsigned long kpos = 0;
1259 while (argc-- > 0) {
1264 if (get_user(str, argv+argc) ||
1265 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1270 if (len > MAX_ARG_STRLEN) {
1275 /* We're going to work our way backwords. */
1281 int offset, bytes_to_copy;
1283 offset = pos % PAGE_SIZE;
1287 bytes_to_copy = offset;
1288 if (bytes_to_copy > len)
1289 bytes_to_copy = len;
1291 offset -= bytes_to_copy;
1292 pos -= bytes_to_copy;
1293 str -= bytes_to_copy;
1294 len -= bytes_to_copy;
1296 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1299 #ifdef CONFIG_STACK_GROWSUP
1300 ret = expand_stack_downwards(bprm->vma, pos);
1302 /* We've exceed the stack rlimit. */
1307 ret = get_user_pages(current, bprm->mm, pos,
1308 1, 1, 1, &page, NULL);
1310 /* We've exceed the stack rlimit. */
1316 flush_kernel_dcache_page(kmapped_page);
1317 kunmap(kmapped_page);
1318 put_page(kmapped_page);
1320 kmapped_page = page;
1321 kaddr = kmap(kmapped_page);
1322 kpos = pos & PAGE_MASK;
1323 flush_cache_page(bprm->vma, kpos,
1324 page_to_pfn(kmapped_page));
1326 if (copy_from_user(kaddr+offset, compat_ptr(str),
1336 flush_kernel_dcache_page(kmapped_page);
1337 kunmap(kmapped_page);
1338 put_page(kmapped_page);
1344 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1345 * that it processes 32 bit argv and envp pointers.
1347 int compat_do_execve(char * filename,
1348 compat_uptr_t __user *argv,
1349 compat_uptr_t __user *envp,
1350 struct pt_regs * regs)
1352 struct linux_binprm *bprm;
1357 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1361 file = open_exec(filename);
1362 retval = PTR_ERR(file);
1369 bprm->filename = filename;
1370 bprm->interp = filename;
1372 retval = bprm_mm_init(bprm);
1376 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1377 if ((retval = bprm->argc) < 0)
1380 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1381 if ((retval = bprm->envc) < 0)
1384 retval = security_bprm_alloc(bprm);
1388 retval = prepare_binprm(bprm);
1392 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1396 bprm->exec = bprm->p;
1397 retval = compat_copy_strings(bprm->envc, envp, bprm);
1401 retval = compat_copy_strings(bprm->argc, argv, bprm);
1405 retval = search_binary_handler(bprm, regs);
1407 /* execve success */
1408 security_bprm_free(bprm);
1409 acct_update_integrals(current);
1416 security_bprm_free(bprm);
1424 allow_write_access(bprm->file);
1435 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1438 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1439 * 64-bit unsigned longs.
1442 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1443 unsigned long *fdset)
1445 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1449 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1456 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1459 *fdset++ = h << 32 | l;
1462 if (odd && __get_user(*fdset, ufdset))
1465 /* Tricky, must clear full unsigned long in the
1466 * kernel fdset at the end, this makes sure that
1469 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1475 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1476 unsigned long *fdset)
1479 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1490 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1495 if (odd && __put_user(*fdset, ufdset))
1502 * This is a virtual copy of sys_select from fs/select.c and probably
1503 * should be compared to it from time to time
1507 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1508 * like to be certain this leads to no problems. So I return
1509 * EINTR just for safety.
1511 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1512 * I'm trying ERESTARTNOHAND which restart only when you want to.
1514 #define MAX_SELECT_SECONDS \
1515 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1517 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1518 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1522 int size, max_fds, ret = -EINVAL;
1523 struct fdtable *fdt;
1524 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1529 /* max_fds can increase, so grab it once to avoid race */
1531 fdt = files_fdtable(current->files);
1532 max_fds = fdt->max_fds;
1538 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1539 * since we used fdset we need to allocate memory in units of
1542 size = FDS_BYTES(n);
1544 if (size > sizeof(stack_fds) / 6) {
1545 bits = kmalloc(6 * size, GFP_KERNEL);
1550 fds.in = (unsigned long *) bits;
1551 fds.out = (unsigned long *) (bits + size);
1552 fds.ex = (unsigned long *) (bits + 2*size);
1553 fds.res_in = (unsigned long *) (bits + 3*size);
1554 fds.res_out = (unsigned long *) (bits + 4*size);
1555 fds.res_ex = (unsigned long *) (bits + 5*size);
1557 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1558 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1559 (ret = compat_get_fd_set(n, exp, fds.ex)))
1561 zero_fd_set(n, fds.res_in);
1562 zero_fd_set(n, fds.res_out);
1563 zero_fd_set(n, fds.res_ex);
1565 ret = do_select(n, &fds, timeout);
1570 ret = -ERESTARTNOHAND;
1571 if (signal_pending(current))
1576 if (compat_set_fd_set(n, inp, fds.res_in) ||
1577 compat_set_fd_set(n, outp, fds.res_out) ||
1578 compat_set_fd_set(n, exp, fds.res_ex))
1581 if (bits != stack_fds)
1587 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1588 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1589 struct compat_timeval __user *tvp)
1592 struct compat_timeval tv;
1596 if (copy_from_user(&tv, tvp, sizeof(tv)))
1599 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1602 /* Cast to u64 to make GCC stop complaining */
1603 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1604 timeout = -1; /* infinite */
1606 timeout = DIV_ROUND_UP(tv.tv_usec, 1000000/HZ);
1607 timeout += tv.tv_sec * HZ;
1611 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1614 struct compat_timeval rtv;
1616 if (current->personality & STICKY_TIMEOUTS)
1618 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1619 rtv.tv_sec = timeout;
1620 if (compat_timeval_compare(&rtv, &tv) >= 0)
1622 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1625 * If an application puts its timeval in read-only
1626 * memory, we don't want the Linux-specific update to
1627 * the timeval to cause a fault after the select has
1628 * completed successfully. However, because we're not
1629 * updating the timeval, we can't restart the system
1632 if (ret == -ERESTARTNOHAND)
1640 #ifdef TIF_RESTORE_SIGMASK
1641 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1642 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1643 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1644 compat_size_t sigsetsize)
1646 compat_sigset_t ss32;
1647 sigset_t ksigmask, sigsaved;
1648 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1649 struct compat_timespec ts;
1653 if (copy_from_user(&ts, tsp, sizeof(ts)))
1656 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1661 if (sigsetsize != sizeof(compat_sigset_t))
1663 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1665 sigset_from_compat(&ksigmask, &ss32);
1667 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1668 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1673 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1674 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1675 timeout += ts.tv_sec * (unsigned long)HZ;
1679 ts.tv_sec -= MAX_SELECT_SECONDS;
1680 timeout = MAX_SELECT_SECONDS * HZ;
1684 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1686 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1689 struct compat_timespec rts;
1691 if (current->personality & STICKY_TIMEOUTS)
1694 rts.tv_sec = timeout / HZ;
1695 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1696 if (rts.tv_nsec >= NSEC_PER_SEC) {
1698 rts.tv_nsec -= NSEC_PER_SEC;
1700 if (compat_timespec_compare(&rts, &ts) >= 0)
1702 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1705 * If an application puts its timeval in read-only
1706 * memory, we don't want the Linux-specific update to
1707 * the timeval to cause a fault after the select has
1708 * completed successfully. However, because we're not
1709 * updating the timeval, we can't restart the system
1712 if (ret == -ERESTARTNOHAND)
1717 if (ret == -ERESTARTNOHAND) {
1719 * Don't restore the signal mask yet. Let do_signal() deliver
1720 * the signal on the way back to userspace, before the signal
1724 memcpy(¤t->saved_sigmask, &sigsaved,
1726 set_thread_flag(TIF_RESTORE_SIGMASK);
1729 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1734 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1735 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1736 struct compat_timespec __user *tsp, void __user *sig)
1738 compat_size_t sigsetsize = 0;
1739 compat_uptr_t up = 0;
1742 if (!access_ok(VERIFY_READ, sig,
1743 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1744 __get_user(up, (compat_uptr_t __user *)sig) ||
1745 __get_user(sigsetsize,
1746 (compat_size_t __user *)(sig+sizeof(up))))
1749 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1753 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1754 unsigned int nfds, struct compat_timespec __user *tsp,
1755 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1757 compat_sigset_t ss32;
1758 sigset_t ksigmask, sigsaved;
1759 struct compat_timespec ts;
1764 if (copy_from_user(&ts, tsp, sizeof(ts)))
1767 /* We assume that ts.tv_sec is always lower than
1768 the number of seconds that can be expressed in
1769 an s64. Otherwise the compiler bitches at us */
1770 timeout = DIV_ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1771 timeout += ts.tv_sec * HZ;
1775 if (sigsetsize != sizeof(compat_sigset_t))
1777 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1779 sigset_from_compat(&ksigmask, &ss32);
1781 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1782 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1785 ret = do_sys_poll(ufds, nfds, &timeout);
1787 /* We can restart this syscall, usually */
1788 if (ret == -EINTR) {
1790 * Don't restore the signal mask yet. Let do_signal() deliver
1791 * the signal on the way back to userspace, before the signal
1795 memcpy(¤t->saved_sigmask, &sigsaved,
1797 set_thread_flag(TIF_RESTORE_SIGMASK);
1799 ret = -ERESTARTNOHAND;
1801 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1803 if (tsp && timeout >= 0) {
1804 struct compat_timespec rts;
1806 if (current->personality & STICKY_TIMEOUTS)
1808 /* Yes, we know it's actually an s64, but it's also positive. */
1809 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1811 rts.tv_sec = timeout;
1812 if (compat_timespec_compare(&rts, &ts) >= 0)
1814 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1817 * If an application puts its timeval in read-only
1818 * memory, we don't want the Linux-specific update to
1819 * the timeval to cause a fault after the select has
1820 * completed successfully. However, because we're not
1821 * updating the timeval, we can't restart the system
1824 if (ret == -ERESTARTNOHAND && timeout >= 0)
1831 #endif /* TIF_RESTORE_SIGMASK */
1833 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1834 /* Stuff for NFS server syscalls... */
1835 struct compat_nfsctl_svc {
1840 struct compat_nfsctl_client {
1841 s8 cl32_ident[NFSCLNT_IDMAX+1];
1843 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1846 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1849 struct compat_nfsctl_export {
1850 char ex32_client[NFSCLNT_IDMAX+1];
1851 char ex32_path[NFS_MAXPATHLEN+1];
1852 compat_dev_t ex32_dev;
1853 compat_ino_t ex32_ino;
1854 compat_int_t ex32_flags;
1855 __compat_uid_t ex32_anon_uid;
1856 __compat_gid_t ex32_anon_gid;
1859 struct compat_nfsctl_fdparm {
1860 struct sockaddr gd32_addr;
1861 s8 gd32_path[NFS_MAXPATHLEN+1];
1862 compat_int_t gd32_version;
1865 struct compat_nfsctl_fsparm {
1866 struct sockaddr gd32_addr;
1867 s8 gd32_path[NFS_MAXPATHLEN+1];
1868 compat_int_t gd32_maxlen;
1871 struct compat_nfsctl_arg {
1872 compat_int_t ca32_version; /* safeguard */
1874 struct compat_nfsctl_svc u32_svc;
1875 struct compat_nfsctl_client u32_client;
1876 struct compat_nfsctl_export u32_export;
1877 struct compat_nfsctl_fdparm u32_getfd;
1878 struct compat_nfsctl_fsparm u32_getfs;
1880 #define ca32_svc u.u32_svc
1881 #define ca32_client u.u32_client
1882 #define ca32_export u.u32_export
1883 #define ca32_getfd u.u32_getfd
1884 #define ca32_getfs u.u32_getfs
1887 union compat_nfsctl_res {
1888 __u8 cr32_getfh[NFS_FHSIZE];
1889 struct knfsd_fh cr32_getfs;
1892 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1893 struct compat_nfsctl_arg __user *arg)
1895 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1896 get_user(karg->ca_version, &arg->ca32_version) ||
1897 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1898 __get_user(karg->ca_svc.svc_nthreads,
1899 &arg->ca32_svc.svc32_nthreads))
1904 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1905 struct compat_nfsctl_arg __user *arg)
1907 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1908 sizeof(arg->ca32_client)) ||
1909 get_user(karg->ca_version, &arg->ca32_version) ||
1910 __copy_from_user(&karg->ca_client.cl_ident[0],
1911 &arg->ca32_client.cl32_ident[0],
1913 __get_user(karg->ca_client.cl_naddr,
1914 &arg->ca32_client.cl32_naddr) ||
1915 __copy_from_user(&karg->ca_client.cl_addrlist[0],
1916 &arg->ca32_client.cl32_addrlist[0],
1917 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
1918 __get_user(karg->ca_client.cl_fhkeytype,
1919 &arg->ca32_client.cl32_fhkeytype) ||
1920 __get_user(karg->ca_client.cl_fhkeylen,
1921 &arg->ca32_client.cl32_fhkeylen) ||
1922 __copy_from_user(&karg->ca_client.cl_fhkey[0],
1923 &arg->ca32_client.cl32_fhkey[0],
1930 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
1931 struct compat_nfsctl_arg __user *arg)
1933 if (!access_ok(VERIFY_READ, &arg->ca32_export,
1934 sizeof(arg->ca32_export)) ||
1935 get_user(karg->ca_version, &arg->ca32_version) ||
1936 __copy_from_user(&karg->ca_export.ex_client[0],
1937 &arg->ca32_export.ex32_client[0],
1939 __copy_from_user(&karg->ca_export.ex_path[0],
1940 &arg->ca32_export.ex32_path[0],
1942 __get_user(karg->ca_export.ex_dev,
1943 &arg->ca32_export.ex32_dev) ||
1944 __get_user(karg->ca_export.ex_ino,
1945 &arg->ca32_export.ex32_ino) ||
1946 __get_user(karg->ca_export.ex_flags,
1947 &arg->ca32_export.ex32_flags) ||
1948 __get_user(karg->ca_export.ex_anon_uid,
1949 &arg->ca32_export.ex32_anon_uid) ||
1950 __get_user(karg->ca_export.ex_anon_gid,
1951 &arg->ca32_export.ex32_anon_gid))
1953 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1954 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1959 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
1960 struct compat_nfsctl_arg __user *arg)
1962 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
1963 sizeof(arg->ca32_getfd)) ||
1964 get_user(karg->ca_version, &arg->ca32_version) ||
1965 __copy_from_user(&karg->ca_getfd.gd_addr,
1966 &arg->ca32_getfd.gd32_addr,
1967 (sizeof(struct sockaddr))) ||
1968 __copy_from_user(&karg->ca_getfd.gd_path,
1969 &arg->ca32_getfd.gd32_path,
1970 (NFS_MAXPATHLEN+1)) ||
1971 __get_user(karg->ca_getfd.gd_version,
1972 &arg->ca32_getfd.gd32_version))
1978 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
1979 struct compat_nfsctl_arg __user *arg)
1981 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
1982 get_user(karg->ca_version, &arg->ca32_version) ||
1983 __copy_from_user(&karg->ca_getfs.gd_addr,
1984 &arg->ca32_getfs.gd32_addr,
1985 (sizeof(struct sockaddr))) ||
1986 __copy_from_user(&karg->ca_getfs.gd_path,
1987 &arg->ca32_getfs.gd32_path,
1988 (NFS_MAXPATHLEN+1)) ||
1989 __get_user(karg->ca_getfs.gd_maxlen,
1990 &arg->ca32_getfs.gd32_maxlen))
1996 /* This really doesn't need translations, we are only passing
1997 * back a union which contains opaque nfs file handle data.
1999 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2000 union compat_nfsctl_res __user *res)
2004 err = copy_to_user(res, kres, sizeof(*res));
2006 return (err) ? -EFAULT : 0;
2009 asmlinkage long compat_sys_nfsservctl(int cmd,
2010 struct compat_nfsctl_arg __user *arg,
2011 union compat_nfsctl_res __user *res)
2013 struct nfsctl_arg *karg;
2014 union nfsctl_res *kres;
2018 karg = kmalloc(sizeof(*karg), GFP_USER);
2019 kres = kmalloc(sizeof(*kres), GFP_USER);
2020 if(!karg || !kres) {
2027 err = compat_nfs_svc_trans(karg, arg);
2030 case NFSCTL_ADDCLIENT:
2031 err = compat_nfs_clnt_trans(karg, arg);
2034 case NFSCTL_DELCLIENT:
2035 err = compat_nfs_clnt_trans(karg, arg);
2039 case NFSCTL_UNEXPORT:
2040 err = compat_nfs_exp_trans(karg, arg);
2044 err = compat_nfs_getfd_trans(karg, arg);
2048 err = compat_nfs_getfs_trans(karg, arg);
2061 /* The __user pointer casts are valid because of the set_fs() */
2062 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2068 if((cmd == NFSCTL_GETFD) ||
2069 (cmd == NFSCTL_GETFS))
2070 err = compat_nfs_getfh_res_trans(kres, res);
2078 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2080 return sys_ni_syscall();
2086 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2087 asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
2088 struct compat_epoll_event __user *event)
2091 struct compat_epoll_event user;
2092 struct epoll_event __user *kernel = NULL;
2095 if (copy_from_user(&user, event, sizeof(user)))
2097 kernel = compat_alloc_user_space(sizeof(struct epoll_event));
2098 err |= __put_user(user.events, &kernel->events);
2099 err |= __put_user(user.data, &kernel->data);
2102 return err ? err : sys_epoll_ctl(epfd, op, fd, kernel);
2106 asmlinkage long compat_sys_epoll_wait(int epfd,
2107 struct compat_epoll_event __user *events,
2108 int maxevents, int timeout)
2110 long i, ret, err = 0;
2111 struct epoll_event __user *kbuf;
2112 struct epoll_event ev;
2114 if ((maxevents <= 0) ||
2115 (maxevents > (INT_MAX / sizeof(struct epoll_event))))
2117 kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents);
2118 ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
2119 for (i = 0; i < ret; i++) {
2120 err |= __get_user(ev.events, &kbuf[i].events);
2121 err |= __get_user(ev.data, &kbuf[i].data);
2122 err |= __put_user(ev.events, &events->events);
2123 err |= __put_user_unaligned(ev.data, &events->data);
2127 return err ? -EFAULT: ret;
2129 #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */
2131 #ifdef TIF_RESTORE_SIGMASK
2132 asmlinkage long compat_sys_epoll_pwait(int epfd,
2133 struct compat_epoll_event __user *events,
2134 int maxevents, int timeout,
2135 const compat_sigset_t __user *sigmask,
2136 compat_size_t sigsetsize)
2139 compat_sigset_t csigmask;
2140 sigset_t ksigmask, sigsaved;
2143 * If the caller wants a certain signal mask to be set during the wait,
2147 if (sigsetsize != sizeof(compat_sigset_t))
2149 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2151 sigset_from_compat(&ksigmask, &csigmask);
2152 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2153 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2156 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2157 err = compat_sys_epoll_wait(epfd, events, maxevents, timeout);
2159 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2163 * If we changed the signal mask, we need to restore the original one.
2164 * In case we've got a signal while waiting, we do not restore the
2165 * signal mask yet, and we allow do_signal() to deliver the signal on
2166 * the way back to userspace, before the signal mask is restored.
2169 if (err == -EINTR) {
2170 memcpy(¤t->saved_sigmask, &sigsaved,
2172 set_thread_flag(TIF_RESTORE_SIGMASK);
2174 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2179 #endif /* TIF_RESTORE_SIGMASK */
2181 #endif /* CONFIG_EPOLL */
2183 #ifdef CONFIG_SIGNALFD
2185 asmlinkage long compat_sys_signalfd(int ufd,
2186 const compat_sigset_t __user *sigmask,
2187 compat_size_t sigsetsize)
2189 compat_sigset_t ss32;
2191 sigset_t __user *ksigmask;
2193 if (sigsetsize != sizeof(compat_sigset_t))
2195 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2197 sigset_from_compat(&tmp, &ss32);
2198 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2199 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2202 return sys_signalfd(ufd, ksigmask, sizeof(sigset_t));
2205 #endif /* CONFIG_SIGNALFD */
2207 #ifdef CONFIG_TIMERFD
2209 asmlinkage long compat_sys_timerfd(int ufd, int clockid, int flags,
2210 const struct compat_itimerspec __user *utmr)
2212 struct itimerspec t;
2213 struct itimerspec __user *ut;
2215 if (get_compat_itimerspec(&t, utmr))
2217 ut = compat_alloc_user_space(sizeof(*ut));
2218 if (copy_to_user(ut, &t, sizeof(t)))
2221 return sys_timerfd(ufd, clockid, flags, ut);
2224 #endif /* CONFIG_TIMERFD */