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/linkage.h>
19 #include <linux/compat.h>
20 #include <linux/errno.h>
21 #include <linux/time.h>
23 #include <linux/fcntl.h>
24 #include <linux/namei.h>
25 #include <linux/file.h>
26 #include <linux/vfs.h>
27 #include <linux/ioctl32.h>
28 #include <linux/ioctl.h>
29 #include <linux/init.h>
30 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
31 #include <linux/smb.h>
32 #include <linux/smb_mount.h>
33 #include <linux/ncp_mount.h>
34 #include <linux/nfs4_mount.h>
35 #include <linux/smp_lock.h>
36 #include <linux/syscalls.h>
37 #include <linux/ctype.h>
38 #include <linux/module.h>
39 #include <linux/dirent.h>
40 #include <linux/fsnotify.h>
41 #include <linux/highuid.h>
42 #include <linux/sunrpc/svc.h>
43 #include <linux/nfsd/nfsd.h>
44 #include <linux/nfsd/syscall.h>
45 #include <linux/personality.h>
46 #include <linux/rwsem.h>
47 #include <linux/acct.h>
50 #include <net/sock.h> /* siocdevprivate_ioctl */
52 #include <asm/uaccess.h>
53 #include <asm/mmu_context.h>
54 #include <asm/ioctls.h>
57 * Not all architectures have sys_utime, so implement this in terms
60 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
65 if (get_user(tv[0].tv_sec, &t->actime) ||
66 get_user(tv[1].tv_sec, &t->modtime))
71 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
74 asmlinkage long compat_sys_futimesat(int dfd, char __user *filename, struct compat_timeval __user *t)
79 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
80 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
81 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
82 get_user(tv[1].tv_usec, &t[1].tv_usec))
85 return do_utimes(dfd, filename, t ? tv : NULL);
88 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
90 return compat_sys_futimesat(AT_FDCWD, filename, t);
93 asmlinkage long compat_sys_newstat(char __user * filename,
94 struct compat_stat __user *statbuf)
97 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
100 error = cp_compat_stat(&stat, statbuf);
104 asmlinkage long compat_sys_newlstat(char __user * filename,
105 struct compat_stat __user *statbuf)
108 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
111 error = cp_compat_stat(&stat, statbuf);
115 asmlinkage long compat_sys_newfstatat(int dfd, char __user *filename,
116 struct compat_stat __user *statbuf, int flag)
121 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
124 if (flag & AT_SYMLINK_NOFOLLOW)
125 error = vfs_lstat_fd(dfd, filename, &stat);
127 error = vfs_stat_fd(dfd, filename, &stat);
130 error = cp_compat_stat(&stat, statbuf);
136 asmlinkage long compat_sys_newfstat(unsigned int fd,
137 struct compat_stat __user * statbuf)
140 int error = vfs_fstat(fd, &stat);
143 error = cp_compat_stat(&stat, statbuf);
147 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
150 if (sizeof ubuf->f_blocks == 4) {
151 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
152 0xffffffff00000000ULL)
154 /* f_files and f_ffree may be -1; it's okay
155 * to stuff that into 32 bits */
156 if (kbuf->f_files != 0xffffffffffffffffULL
157 && (kbuf->f_files & 0xffffffff00000000ULL))
159 if (kbuf->f_ffree != 0xffffffffffffffffULL
160 && (kbuf->f_ffree & 0xffffffff00000000ULL))
163 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
164 __put_user(kbuf->f_type, &ubuf->f_type) ||
165 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
166 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
167 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
168 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
169 __put_user(kbuf->f_files, &ubuf->f_files) ||
170 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
171 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
172 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
173 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
174 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
175 __put_user(0, &ubuf->f_spare[0]) ||
176 __put_user(0, &ubuf->f_spare[1]) ||
177 __put_user(0, &ubuf->f_spare[2]) ||
178 __put_user(0, &ubuf->f_spare[3]) ||
179 __put_user(0, &ubuf->f_spare[4]))
185 * The following statfs calls are copies of code from fs/open.c and
186 * should be checked against those from time to time
188 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
193 error = user_path_walk(path, &nd);
196 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
198 error = put_compat_statfs(buf, &tmp);
204 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
214 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
216 error = put_compat_statfs(buf, &tmp);
222 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
224 if (sizeof ubuf->f_blocks == 4) {
225 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
226 0xffffffff00000000ULL)
228 /* f_files and f_ffree may be -1; it's okay
229 * to stuff that into 32 bits */
230 if (kbuf->f_files != 0xffffffffffffffffULL
231 && (kbuf->f_files & 0xffffffff00000000ULL))
233 if (kbuf->f_ffree != 0xffffffffffffffffULL
234 && (kbuf->f_ffree & 0xffffffff00000000ULL))
237 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
238 __put_user(kbuf->f_type, &ubuf->f_type) ||
239 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
240 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
241 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
242 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
243 __put_user(kbuf->f_files, &ubuf->f_files) ||
244 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
245 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
246 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
247 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
248 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
253 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
258 if (sz != sizeof(*buf))
261 error = user_path_walk(path, &nd);
264 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
266 error = put_compat_statfs64(buf, &tmp);
272 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
278 if (sz != sizeof(*buf))
285 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
287 error = put_compat_statfs64(buf, &tmp);
293 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
295 #define IOCTL_HASHSIZE 256
296 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
298 extern struct ioctl_trans ioctl_start[];
299 extern int ioctl_table_size;
301 static inline unsigned long ioctl32_hash(unsigned long cmd)
303 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
306 static void ioctl32_insert_translation(struct ioctl_trans *trans)
309 struct ioctl_trans *t;
311 hash = ioctl32_hash (trans->cmd);
312 if (!ioctl32_hash_table[hash])
313 ioctl32_hash_table[hash] = trans;
315 t = ioctl32_hash_table[hash];
323 static int __init init_sys32_ioctl(void)
327 for (i = 0; i < ioctl_table_size; i++) {
328 if (ioctl_start[i].next != 0) {
329 printk("ioctl translation %d bad\n",i);
333 ioctl32_insert_translation(&ioctl_start[i]);
338 __initcall(init_sys32_ioctl);
340 static void compat_ioctl_error(struct file *filp, unsigned int fd,
341 unsigned int cmd, unsigned long arg)
347 /* find the name of the device. */
348 path = (char *)__get_free_page(GFP_KERNEL);
350 fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
355 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
356 if (!isprint(buf[1]))
357 sprintf(buf, "%02x", buf[1]);
358 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
359 "cmd(%08x){%s} arg(%08x) on %s\n",
360 current->comm, current->pid,
361 (int)fd, (unsigned int)cmd, buf,
362 (unsigned int)arg, fn);
365 free_page((unsigned long)path);
368 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
373 struct ioctl_trans *t;
376 filp = fget_light(fd, &fput_needed);
380 /* RED-PEN how should LSM module know it's handling 32bit? */
381 error = security_file_ioctl(filp, cmd, arg);
386 * To allow the compat_ioctl handlers to be self contained
387 * we need to check the common ioctls here first.
388 * Just handle them with the standard handlers below.
401 if (S_ISREG(filp->f_dentry->d_inode->i_mode))
406 if (filp->f_op && filp->f_op->compat_ioctl) {
407 error = filp->f_op->compat_ioctl(filp, cmd, arg);
408 if (error != -ENOIOCTLCMD)
413 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
418 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
423 if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
424 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
425 error = siocdevprivate_ioctl(fd, cmd, arg);
430 compat_ioctl_error(filp, fd, cmd, arg);
439 error = t->handler(fd, cmd, arg, filp);
445 error = vfs_ioctl(filp, fd, cmd, arg);
447 fput_light(filp, fput_needed);
452 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
454 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
455 __get_user(kfl->l_type, &ufl->l_type) ||
456 __get_user(kfl->l_whence, &ufl->l_whence) ||
457 __get_user(kfl->l_start, &ufl->l_start) ||
458 __get_user(kfl->l_len, &ufl->l_len) ||
459 __get_user(kfl->l_pid, &ufl->l_pid))
464 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
466 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
467 __put_user(kfl->l_type, &ufl->l_type) ||
468 __put_user(kfl->l_whence, &ufl->l_whence) ||
469 __put_user(kfl->l_start, &ufl->l_start) ||
470 __put_user(kfl->l_len, &ufl->l_len) ||
471 __put_user(kfl->l_pid, &ufl->l_pid))
476 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
477 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
479 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
480 __get_user(kfl->l_type, &ufl->l_type) ||
481 __get_user(kfl->l_whence, &ufl->l_whence) ||
482 __get_user(kfl->l_start, &ufl->l_start) ||
483 __get_user(kfl->l_len, &ufl->l_len) ||
484 __get_user(kfl->l_pid, &ufl->l_pid))
490 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
491 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
493 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
494 __put_user(kfl->l_type, &ufl->l_type) ||
495 __put_user(kfl->l_whence, &ufl->l_whence) ||
496 __put_user(kfl->l_start, &ufl->l_start) ||
497 __put_user(kfl->l_len, &ufl->l_len) ||
498 __put_user(kfl->l_pid, &ufl->l_pid))
504 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
515 ret = get_compat_flock(&f, compat_ptr(arg));
520 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
522 if (cmd == F_GETLK && ret == 0) {
523 /* GETLK was successfule and we need to return the data...
524 * but it needs to fit in the compat structure.
525 * l_start shouldn't be too big, unless the original
526 * start + end is greater than COMPAT_OFF_T_MAX, in which
527 * case the app was asking for trouble, so we return
528 * -EOVERFLOW in that case.
529 * l_len could be too big, in which case we just truncate it,
530 * and only allow the app to see that part of the conflicting
531 * lock that might make sense to it anyway
534 if (f.l_start > COMPAT_OFF_T_MAX)
536 if (f.l_len > COMPAT_OFF_T_MAX)
537 f.l_len = COMPAT_OFF_T_MAX;
539 ret = put_compat_flock(&f, compat_ptr(arg));
546 ret = get_compat_flock64(&f, compat_ptr(arg));
551 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
552 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
555 if (cmd == F_GETLK64 && ret == 0) {
556 /* need to return lock information - see above for commentary */
557 if (f.l_start > COMPAT_LOFF_T_MAX)
559 if (f.l_len > COMPAT_LOFF_T_MAX)
560 f.l_len = COMPAT_LOFF_T_MAX;
562 ret = put_compat_flock64(&f, compat_ptr(arg));
567 ret = sys_fcntl(fd, cmd, arg);
573 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
576 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
578 return compat_sys_fcntl64(fd, cmd, arg);
582 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
587 mm_segment_t oldfs = get_fs();
588 if (unlikely(get_user(ctx64, ctx32p)))
592 /* The __user pointer cast is valid because of the set_fs() */
593 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
595 /* truncating is ok because it's a user address */
597 ret = put_user((u32) ctx64, ctx32p);
602 compat_sys_io_getevents(aio_context_t ctx_id,
603 unsigned long min_nr,
605 struct io_event __user *events,
606 struct compat_timespec __user *timeout)
610 struct timespec __user *ut = NULL;
613 if (unlikely(!access_ok(VERIFY_WRITE, events,
614 nr * sizeof(struct io_event))))
617 if (get_compat_timespec(&t, timeout))
620 ut = compat_alloc_user_space(sizeof(*ut));
621 if (copy_to_user(ut, &t, sizeof(t)) )
624 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
630 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
635 for (i = 0; i < nr; ++i) {
636 if (get_user(uptr, ptr32 + i))
638 if (put_user(compat_ptr(uptr), ptr64 + i))
644 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
647 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
649 struct iocb __user * __user *iocb64;
652 if (unlikely(nr < 0))
655 if (nr > MAX_AIO_SUBMITS)
656 nr = MAX_AIO_SUBMITS;
658 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
659 ret = copy_iocb(nr, iocb, iocb64);
661 ret = sys_io_submit(ctx_id, nr, iocb64);
665 struct compat_ncp_mount_data {
666 compat_int_t version;
667 compat_uint_t ncp_fd;
668 __compat_uid_t mounted_uid;
669 compat_pid_t wdog_pid;
670 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
671 compat_uint_t time_out;
672 compat_uint_t retry_count;
676 compat_mode_t file_mode;
677 compat_mode_t dir_mode;
680 struct compat_ncp_mount_data_v4 {
681 compat_int_t version;
682 compat_ulong_t flags;
683 compat_ulong_t mounted_uid;
684 compat_long_t wdog_pid;
685 compat_uint_t ncp_fd;
686 compat_uint_t time_out;
687 compat_uint_t retry_count;
690 compat_ulong_t file_mode;
691 compat_ulong_t dir_mode;
694 static void *do_ncp_super_data_conv(void *raw_data)
696 int version = *(unsigned int *)raw_data;
699 struct compat_ncp_mount_data *c_n = raw_data;
700 struct ncp_mount_data *n = raw_data;
702 n->dir_mode = c_n->dir_mode;
703 n->file_mode = c_n->file_mode;
706 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
707 n->wdog_pid = c_n->wdog_pid;
708 n->mounted_uid = c_n->mounted_uid;
709 } else if (version == 4) {
710 struct compat_ncp_mount_data_v4 *c_n = raw_data;
711 struct ncp_mount_data_v4 *n = raw_data;
713 n->dir_mode = c_n->dir_mode;
714 n->file_mode = c_n->file_mode;
717 n->retry_count = c_n->retry_count;
718 n->time_out = c_n->time_out;
719 n->ncp_fd = c_n->ncp_fd;
720 n->wdog_pid = c_n->wdog_pid;
721 n->mounted_uid = c_n->mounted_uid;
722 n->flags = c_n->flags;
723 } else if (version != 5) {
730 struct compat_smb_mount_data {
731 compat_int_t version;
732 __compat_uid_t mounted_uid;
735 compat_mode_t file_mode;
736 compat_mode_t dir_mode;
739 static void *do_smb_super_data_conv(void *raw_data)
741 struct smb_mount_data *s = raw_data;
742 struct compat_smb_mount_data *c_s = raw_data;
744 if (c_s->version != SMB_MOUNT_OLDVERSION)
746 s->dir_mode = c_s->dir_mode;
747 s->file_mode = c_s->file_mode;
750 s->mounted_uid = c_s->mounted_uid;
755 struct compat_nfs_string {
760 static inline void compat_nfs_string(struct nfs_string *dst,
761 struct compat_nfs_string *src)
763 dst->data = compat_ptr(src->data);
767 struct compat_nfs4_mount_data_v1 {
768 compat_int_t version;
773 compat_int_t retrans;
774 compat_int_t acregmin;
775 compat_int_t acregmax;
776 compat_int_t acdirmin;
777 compat_int_t acdirmax;
778 struct compat_nfs_string client_addr;
779 struct compat_nfs_string mnt_path;
780 struct compat_nfs_string hostname;
781 compat_uint_t host_addrlen;
782 compat_uptr_t host_addr;
784 compat_int_t auth_flavourlen;
785 compat_uptr_t auth_flavours;
788 static int do_nfs4_super_data_conv(void *raw_data)
790 int version = *(compat_uint_t *) raw_data;
793 struct compat_nfs4_mount_data_v1 *raw = raw_data;
794 struct nfs4_mount_data *real = raw_data;
796 /* copy the fields backwards */
797 real->auth_flavours = compat_ptr(raw->auth_flavours);
798 real->auth_flavourlen = raw->auth_flavourlen;
799 real->proto = raw->proto;
800 real->host_addr = compat_ptr(raw->host_addr);
801 real->host_addrlen = raw->host_addrlen;
802 compat_nfs_string(&real->hostname, &raw->hostname);
803 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
804 compat_nfs_string(&real->client_addr, &raw->client_addr);
805 real->acdirmax = raw->acdirmax;
806 real->acdirmin = raw->acdirmin;
807 real->acregmax = raw->acregmax;
808 real->acregmin = raw->acregmin;
809 real->retrans = raw->retrans;
810 real->timeo = raw->timeo;
811 real->wsize = raw->wsize;
812 real->rsize = raw->rsize;
813 real->flags = raw->flags;
814 real->version = raw->version;
823 extern int copy_mount_options (const void __user *, unsigned long *);
825 #define SMBFS_NAME "smbfs"
826 #define NCPFS_NAME "ncpfs"
827 #define NFS4_NAME "nfs4"
829 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
830 char __user * type, unsigned long flags,
833 unsigned long type_page;
834 unsigned long data_page;
835 unsigned long dev_page;
839 retval = copy_mount_options (type, &type_page);
843 dir_page = getname(dir_name);
844 retval = PTR_ERR(dir_page);
845 if (IS_ERR(dir_page))
848 retval = copy_mount_options (dev_name, &dev_page);
852 retval = copy_mount_options (data, &data_page);
859 if (!strcmp((char *)type_page, SMBFS_NAME)) {
860 do_smb_super_data_conv((void *)data_page);
861 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
862 do_ncp_super_data_conv((void *)data_page);
863 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
864 if (do_nfs4_super_data_conv((void *) data_page))
870 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
871 flags, (void*)data_page);
875 free_page(data_page);
881 free_page(type_page);
886 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
887 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
888 ~(sizeof(compat_long_t)-1))
890 struct compat_old_linux_dirent {
891 compat_ulong_t d_ino;
892 compat_ulong_t d_offset;
893 unsigned short d_namlen;
897 struct compat_readdir_callback {
898 struct compat_old_linux_dirent __user *dirent;
902 static int compat_fillonedir(void *__buf, const char *name, int namlen,
903 loff_t offset, ino_t ino, unsigned int d_type)
905 struct compat_readdir_callback *buf = __buf;
906 struct compat_old_linux_dirent __user *dirent;
911 dirent = buf->dirent;
912 if (!access_ok(VERIFY_WRITE, dirent,
913 (unsigned long)(dirent->d_name + namlen + 1) -
914 (unsigned long)dirent))
916 if ( __put_user(ino, &dirent->d_ino) ||
917 __put_user(offset, &dirent->d_offset) ||
918 __put_user(namlen, &dirent->d_namlen) ||
919 __copy_to_user(dirent->d_name, name, namlen) ||
920 __put_user(0, dirent->d_name + namlen))
924 buf->result = -EFAULT;
928 asmlinkage long compat_sys_old_readdir(unsigned int fd,
929 struct compat_old_linux_dirent __user *dirent, unsigned int count)
933 struct compat_readdir_callback buf;
943 error = vfs_readdir(file, compat_fillonedir, &buf);
952 struct compat_linux_dirent {
953 compat_ulong_t d_ino;
954 compat_ulong_t d_off;
955 unsigned short d_reclen;
959 struct compat_getdents_callback {
960 struct compat_linux_dirent __user *current_dir;
961 struct compat_linux_dirent __user *previous;
966 static int compat_filldir(void *__buf, const char *name, int namlen,
967 loff_t offset, ino_t ino, unsigned int d_type)
969 struct compat_linux_dirent __user * dirent;
970 struct compat_getdents_callback *buf = __buf;
971 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
973 buf->error = -EINVAL; /* only used if we fail.. */
974 if (reclen > buf->count)
976 dirent = buf->previous;
978 if (__put_user(offset, &dirent->d_off))
981 dirent = buf->current_dir;
982 if (__put_user(ino, &dirent->d_ino))
984 if (__put_user(reclen, &dirent->d_reclen))
986 if (copy_to_user(dirent->d_name, name, namlen))
988 if (__put_user(0, dirent->d_name + namlen))
990 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
992 buf->previous = dirent;
993 dirent = (void __user *)dirent + reclen;
994 buf->current_dir = dirent;
995 buf->count -= reclen;
998 buf->error = -EFAULT;
1002 asmlinkage long compat_sys_getdents(unsigned int fd,
1003 struct compat_linux_dirent __user *dirent, unsigned int count)
1006 struct compat_linux_dirent __user * lastdirent;
1007 struct compat_getdents_callback buf;
1011 if (!access_ok(VERIFY_WRITE, dirent, count))
1019 buf.current_dir = dirent;
1020 buf.previous = NULL;
1024 error = vfs_readdir(file, compat_filldir, &buf);
1028 lastdirent = buf.previous;
1030 if (put_user(file->f_pos, &lastdirent->d_off))
1033 error = count - buf.count;
1042 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1043 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1045 struct compat_getdents_callback64 {
1046 struct linux_dirent64 __user *current_dir;
1047 struct linux_dirent64 __user *previous;
1052 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1053 ino_t ino, unsigned int d_type)
1055 struct linux_dirent64 __user *dirent;
1056 struct compat_getdents_callback64 *buf = __buf;
1057 int jj = NAME_OFFSET(dirent);
1058 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1061 buf->error = -EINVAL; /* only used if we fail.. */
1062 if (reclen > buf->count)
1064 dirent = buf->previous;
1067 if (__put_user_unaligned(offset, &dirent->d_off))
1070 dirent = buf->current_dir;
1071 if (__put_user_unaligned(ino, &dirent->d_ino))
1074 if (__put_user_unaligned(off, &dirent->d_off))
1076 if (__put_user(reclen, &dirent->d_reclen))
1078 if (__put_user(d_type, &dirent->d_type))
1080 if (copy_to_user(dirent->d_name, name, namlen))
1082 if (__put_user(0, dirent->d_name + namlen))
1084 buf->previous = dirent;
1085 dirent = (void __user *)dirent + reclen;
1086 buf->current_dir = dirent;
1087 buf->count -= reclen;
1090 buf->error = -EFAULT;
1094 asmlinkage long compat_sys_getdents64(unsigned int fd,
1095 struct linux_dirent64 __user * dirent, unsigned int count)
1098 struct linux_dirent64 __user * lastdirent;
1099 struct compat_getdents_callback64 buf;
1103 if (!access_ok(VERIFY_WRITE, dirent, count))
1111 buf.current_dir = dirent;
1112 buf.previous = NULL;
1116 error = vfs_readdir(file, compat_filldir64, &buf);
1120 lastdirent = buf.previous;
1122 typeof(lastdirent->d_off) d_off = file->f_pos;
1123 __put_user_unaligned(d_off, &lastdirent->d_off);
1124 error = count - buf.count;
1132 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1134 static ssize_t compat_do_readv_writev(int type, struct file *file,
1135 const struct compat_iovec __user *uvector,
1136 unsigned long nr_segs, loff_t *pos)
1138 typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
1139 typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
1141 compat_ssize_t tot_len;
1142 struct iovec iovstack[UIO_FASTIOV];
1143 struct iovec *iov=iovstack, *vector;
1150 * SuS says "The readv() function *may* fail if the iovcnt argument
1151 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1152 * traditionally returned zero for zero segments, so...
1159 * First get the "struct iovec" from user memory and
1160 * verify all the pointers
1163 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1167 if (nr_segs > UIO_FASTIOV) {
1169 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1174 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1178 * Single unix specification:
1179 * We should -EINVAL if an element length is not >= 0 and fitting an
1180 * ssize_t. The total length is fitting an ssize_t
1182 * Be careful here because iov_len is a size_t not an ssize_t
1187 for (seg = 0 ; seg < nr_segs; seg++) {
1188 compat_ssize_t tmp = tot_len;
1192 if (__get_user(len, &uvector->iov_len) ||
1193 __get_user(buf, &uvector->iov_base)) {
1197 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1200 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1202 vector->iov_base = compat_ptr(buf);
1203 vector->iov_len = (compat_size_t) len;
1212 ret = rw_verify_area(type, file, pos, tot_len);
1218 fn = file->f_op->read;
1219 fnv = file->f_op->readv;
1221 fn = (io_fn_t)file->f_op->write;
1222 fnv = file->f_op->writev;
1225 ret = fnv(file, iov, nr_segs, pos);
1229 /* Do it by hand, with file-ops */
1232 while (nr_segs > 0) {
1237 base = vector->iov_base;
1238 len = vector->iov_len;
1242 nr = fn(file, base, len, pos);
1253 if (iov != iovstack)
1255 if ((ret + (type == READ)) > 0) {
1256 struct dentry *dentry = file->f_dentry;
1258 fsnotify_access(dentry);
1260 fsnotify_modify(dentry);
1266 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1269 ssize_t ret = -EBADF;
1275 if (!(file->f_mode & FMODE_READ))
1279 if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
1282 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1290 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1293 ssize_t ret = -EBADF;
1298 if (!(file->f_mode & FMODE_WRITE))
1302 if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
1305 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1313 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1317 compat_sys_open(const char __user *filename, int flags, int mode)
1319 return do_sys_open(AT_FDCWD, filename, flags, mode);
1323 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1327 compat_sys_openat(int dfd, const char __user *filename, int flags, int mode)
1329 return do_sys_open(dfd, filename, flags, mode);
1333 * compat_count() counts the number of arguments/envelopes. It is basically
1334 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1335 * and envp pointers.
1337 static int compat_count(compat_uptr_t __user *argv, int max)
1345 if (get_user(p, argv))
1358 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1359 * except that it works with 32 bit argv and envp pointers.
1361 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1362 struct linux_binprm *bprm)
1364 struct page *kmapped_page = NULL;
1368 while (argc-- > 0) {
1373 if (get_user(str, argv+argc) ||
1374 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1379 if (bprm->p < len) {
1385 /* XXX: add architecture specific overflow check here. */
1390 int offset, bytes_to_copy;
1393 offset = pos % PAGE_SIZE;
1395 page = bprm->page[i];
1398 page = alloc_page(GFP_HIGHUSER);
1399 bprm->page[i] = page;
1407 if (page != kmapped_page) {
1409 kunmap(kmapped_page);
1410 kmapped_page = page;
1411 kaddr = kmap(kmapped_page);
1414 memset(kaddr, 0, offset);
1415 bytes_to_copy = PAGE_SIZE - offset;
1416 if (bytes_to_copy > len) {
1417 bytes_to_copy = len;
1419 memset(kaddr+offset+len, 0,
1420 PAGE_SIZE-offset-len);
1422 err = copy_from_user(kaddr+offset, compat_ptr(str),
1429 pos += bytes_to_copy;
1430 str += bytes_to_copy;
1431 len -= bytes_to_copy;
1437 kunmap(kmapped_page);
1443 #define free_arg_pages(bprm) do { } while (0)
1447 static inline void free_arg_pages(struct linux_binprm *bprm)
1451 for (i = 0; i < MAX_ARG_PAGES; i++) {
1453 __free_page(bprm->page[i]);
1454 bprm->page[i] = NULL;
1458 #endif /* CONFIG_MMU */
1461 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1462 * that it processes 32 bit argv and envp pointers.
1464 int compat_do_execve(char * filename,
1465 compat_uptr_t __user *argv,
1466 compat_uptr_t __user *envp,
1467 struct pt_regs * regs)
1469 struct linux_binprm *bprm;
1475 bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
1478 memset(bprm, 0, sizeof(*bprm));
1480 file = open_exec(filename);
1481 retval = PTR_ERR(file);
1487 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1489 bprm->filename = filename;
1490 bprm->interp = filename;
1491 bprm->mm = mm_alloc();
1496 retval = init_new_context(current, bprm->mm);
1500 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1501 if ((retval = bprm->argc) < 0)
1504 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1505 if ((retval = bprm->envc) < 0)
1508 retval = security_bprm_alloc(bprm);
1512 retval = prepare_binprm(bprm);
1516 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1520 bprm->exec = bprm->p;
1521 retval = compat_copy_strings(bprm->envc, envp, bprm);
1525 retval = compat_copy_strings(bprm->argc, argv, bprm);
1529 retval = search_binary_handler(bprm, regs);
1531 free_arg_pages(bprm);
1533 /* execve success */
1534 security_bprm_free(bprm);
1535 acct_update_integrals(current);
1541 /* Something went wrong, return the inode and free the argument pages*/
1542 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1543 struct page * page = bprm->page[i];
1549 security_bprm_free(bprm);
1557 allow_write_access(bprm->file);
1568 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1570 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1573 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1574 * 64-bit unsigned longs.
1577 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1578 unsigned long *fdset)
1580 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1584 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1591 __get_user(l, ufdset);
1592 __get_user(h, ufdset+1);
1594 *fdset++ = h << 32 | l;
1598 __get_user(*fdset, ufdset);
1600 /* Tricky, must clear full unsigned long in the
1601 * kernel fdset at the end, this makes sure that
1604 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1610 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1611 unsigned long *fdset)
1614 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1625 __put_user(l, ufdset);
1626 __put_user(h, ufdset+1);
1631 __put_user(*fdset, ufdset);
1636 * This is a virtual copy of sys_select from fs/select.c and probably
1637 * should be compared to it from time to time
1639 static void *select_bits_alloc(int size)
1641 return kmalloc(6 * size, GFP_KERNEL);
1644 static void select_bits_free(void *bits, int size)
1650 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1651 * like to be certain this leads to no problems. So I return
1652 * EINTR just for safety.
1654 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1655 * I'm trying ERESTARTNOHAND which restart only when you want to.
1657 #define MAX_SELECT_SECONDS \
1658 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1661 compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp,
1662 compat_ulong_t __user *exp, struct compat_timeval __user *tvp)
1667 int size, max_fdset, ret = -EINVAL;
1668 struct fdtable *fdt;
1670 timeout = MAX_SCHEDULE_TIMEOUT;
1674 if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
1675 || __get_user(sec, &tvp->tv_sec)
1676 || __get_user(usec, &tvp->tv_usec)) {
1681 if (sec < 0 || usec < 0)
1684 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1685 timeout = ROUND_UP(usec, 1000000/HZ);
1686 timeout += sec * (unsigned long) HZ;
1693 /* max_fdset can increase, so grab it once to avoid race */
1695 fdt = files_fdtable(current->files);
1696 max_fdset = fdt->max_fdset;
1702 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1703 * since we used fdset we need to allocate memory in units of
1707 size = FDS_BYTES(n);
1708 bits = select_bits_alloc(size);
1711 fds.in = (unsigned long *) bits;
1712 fds.out = (unsigned long *) (bits + size);
1713 fds.ex = (unsigned long *) (bits + 2*size);
1714 fds.res_in = (unsigned long *) (bits + 3*size);
1715 fds.res_out = (unsigned long *) (bits + 4*size);
1716 fds.res_ex = (unsigned long *) (bits + 5*size);
1718 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1719 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1720 (ret = compat_get_fd_set(n, exp, fds.ex)))
1722 zero_fd_set(n, fds.res_in);
1723 zero_fd_set(n, fds.res_out);
1724 zero_fd_set(n, fds.res_ex);
1726 ret = do_select(n, &fds, &timeout);
1728 if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
1729 time_t sec = 0, usec = 0;
1732 usec = timeout % HZ;
1733 usec *= (1000000/HZ);
1735 if (put_user(sec, &tvp->tv_sec) ||
1736 put_user(usec, &tvp->tv_usec))
1743 ret = -ERESTARTNOHAND;
1744 if (signal_pending(current))
1749 compat_set_fd_set(n, inp, fds.res_in);
1750 compat_set_fd_set(n, outp, fds.res_out);
1751 compat_set_fd_set(n, exp, fds.res_ex);
1754 select_bits_free(bits, size);
1759 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1760 /* Stuff for NFS server syscalls... */
1761 struct compat_nfsctl_svc {
1766 struct compat_nfsctl_client {
1767 s8 cl32_ident[NFSCLNT_IDMAX+1];
1769 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1772 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1775 struct compat_nfsctl_export {
1776 char ex32_client[NFSCLNT_IDMAX+1];
1777 char ex32_path[NFS_MAXPATHLEN+1];
1778 compat_dev_t ex32_dev;
1779 compat_ino_t ex32_ino;
1780 compat_int_t ex32_flags;
1781 __compat_uid_t ex32_anon_uid;
1782 __compat_gid_t ex32_anon_gid;
1785 struct compat_nfsctl_fdparm {
1786 struct sockaddr gd32_addr;
1787 s8 gd32_path[NFS_MAXPATHLEN+1];
1788 compat_int_t gd32_version;
1791 struct compat_nfsctl_fsparm {
1792 struct sockaddr gd32_addr;
1793 s8 gd32_path[NFS_MAXPATHLEN+1];
1794 compat_int_t gd32_maxlen;
1797 struct compat_nfsctl_arg {
1798 compat_int_t ca32_version; /* safeguard */
1800 struct compat_nfsctl_svc u32_svc;
1801 struct compat_nfsctl_client u32_client;
1802 struct compat_nfsctl_export u32_export;
1803 struct compat_nfsctl_fdparm u32_getfd;
1804 struct compat_nfsctl_fsparm u32_getfs;
1806 #define ca32_svc u.u32_svc
1807 #define ca32_client u.u32_client
1808 #define ca32_export u.u32_export
1809 #define ca32_getfd u.u32_getfd
1810 #define ca32_getfs u.u32_getfs
1813 union compat_nfsctl_res {
1814 __u8 cr32_getfh[NFS_FHSIZE];
1815 struct knfsd_fh cr32_getfs;
1818 static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1822 err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
1823 err |= get_user(karg->ca_version, &arg->ca32_version);
1824 err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
1825 err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
1826 return (err) ? -EFAULT : 0;
1829 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1833 err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
1834 err |= get_user(karg->ca_version, &arg->ca32_version);
1835 err |= __copy_from_user(&karg->ca_client.cl_ident[0],
1836 &arg->ca32_client.cl32_ident[0],
1838 err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
1839 err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
1840 &arg->ca32_client.cl32_addrlist[0],
1841 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
1842 err |= __get_user(karg->ca_client.cl_fhkeytype,
1843 &arg->ca32_client.cl32_fhkeytype);
1844 err |= __get_user(karg->ca_client.cl_fhkeylen,
1845 &arg->ca32_client.cl32_fhkeylen);
1846 err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
1847 &arg->ca32_client.cl32_fhkey[0],
1850 return (err) ? -EFAULT : 0;
1853 static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1857 err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
1858 err |= get_user(karg->ca_version, &arg->ca32_version);
1859 err |= __copy_from_user(&karg->ca_export.ex_client[0],
1860 &arg->ca32_export.ex32_client[0],
1862 err |= __copy_from_user(&karg->ca_export.ex_path[0],
1863 &arg->ca32_export.ex32_path[0],
1865 err |= __get_user(karg->ca_export.ex_dev,
1866 &arg->ca32_export.ex32_dev);
1867 err |= __get_user(karg->ca_export.ex_ino,
1868 &arg->ca32_export.ex32_ino);
1869 err |= __get_user(karg->ca_export.ex_flags,
1870 &arg->ca32_export.ex32_flags);
1871 err |= __get_user(karg->ca_export.ex_anon_uid,
1872 &arg->ca32_export.ex32_anon_uid);
1873 err |= __get_user(karg->ca_export.ex_anon_gid,
1874 &arg->ca32_export.ex32_anon_gid);
1875 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1876 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1878 return (err) ? -EFAULT : 0;
1881 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1885 err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
1886 err |= get_user(karg->ca_version, &arg->ca32_version);
1887 err |= __copy_from_user(&karg->ca_getfd.gd_addr,
1888 &arg->ca32_getfd.gd32_addr,
1889 (sizeof(struct sockaddr)));
1890 err |= __copy_from_user(&karg->ca_getfd.gd_path,
1891 &arg->ca32_getfd.gd32_path,
1892 (NFS_MAXPATHLEN+1));
1893 err |= __get_user(karg->ca_getfd.gd_version,
1894 &arg->ca32_getfd.gd32_version);
1896 return (err) ? -EFAULT : 0;
1899 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1903 err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
1904 err |= get_user(karg->ca_version, &arg->ca32_version);
1905 err |= __copy_from_user(&karg->ca_getfs.gd_addr,
1906 &arg->ca32_getfs.gd32_addr,
1907 (sizeof(struct sockaddr)));
1908 err |= __copy_from_user(&karg->ca_getfs.gd_path,
1909 &arg->ca32_getfs.gd32_path,
1910 (NFS_MAXPATHLEN+1));
1911 err |= __get_user(karg->ca_getfs.gd_maxlen,
1912 &arg->ca32_getfs.gd32_maxlen);
1914 return (err) ? -EFAULT : 0;
1917 /* This really doesn't need translations, we are only passing
1918 * back a union which contains opaque nfs file handle data.
1920 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
1924 err = copy_to_user(res, kres, sizeof(*res));
1926 return (err) ? -EFAULT : 0;
1929 asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
1930 union compat_nfsctl_res __user *res)
1932 struct nfsctl_arg *karg;
1933 union nfsctl_res *kres;
1937 karg = kmalloc(sizeof(*karg), GFP_USER);
1938 kres = kmalloc(sizeof(*kres), GFP_USER);
1939 if(!karg || !kres) {
1946 err = compat_nfs_svc_trans(karg, arg);
1949 case NFSCTL_ADDCLIENT:
1950 err = compat_nfs_clnt_trans(karg, arg);
1953 case NFSCTL_DELCLIENT:
1954 err = compat_nfs_clnt_trans(karg, arg);
1958 case NFSCTL_UNEXPORT:
1959 err = compat_nfs_exp_trans(karg, arg);
1963 err = compat_nfs_getfd_trans(karg, arg);
1967 err = compat_nfs_getfs_trans(karg, arg);
1977 /* The __user pointer casts are valid because of the set_fs() */
1978 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
1984 if((cmd == NFSCTL_GETFD) ||
1985 (cmd == NFSCTL_GETFS))
1986 err = compat_nfs_getfh_res_trans(kres, res);
1994 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
1996 return sys_ni_syscall();