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>
56 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
59 * Not all architectures have sys_utime, so implement this in terms
62 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
67 if (get_user(tv[0].tv_sec, &t->actime) ||
68 get_user(tv[1].tv_sec, &t->modtime))
73 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
76 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
81 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
82 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
83 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
84 get_user(tv[1].tv_usec, &t[1].tv_usec))
87 return do_utimes(dfd, filename, t ? tv : NULL);
90 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
92 return compat_sys_futimesat(AT_FDCWD, filename, t);
95 asmlinkage long compat_sys_newstat(char __user * filename,
96 struct compat_stat __user *statbuf)
99 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
102 error = cp_compat_stat(&stat, statbuf);
106 asmlinkage long compat_sys_newlstat(char __user * filename,
107 struct compat_stat __user *statbuf)
110 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
113 error = cp_compat_stat(&stat, statbuf);
117 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
118 struct compat_stat __user *statbuf, int flag)
123 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
126 if (flag & AT_SYMLINK_NOFOLLOW)
127 error = vfs_lstat_fd(dfd, filename, &stat);
129 error = vfs_stat_fd(dfd, filename, &stat);
132 error = cp_compat_stat(&stat, statbuf);
138 asmlinkage long compat_sys_newfstat(unsigned int fd,
139 struct compat_stat __user * statbuf)
142 int error = vfs_fstat(fd, &stat);
145 error = cp_compat_stat(&stat, statbuf);
149 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
152 if (sizeof ubuf->f_blocks == 4) {
153 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
154 0xffffffff00000000ULL)
156 /* f_files and f_ffree may be -1; it's okay
157 * to stuff that into 32 bits */
158 if (kbuf->f_files != 0xffffffffffffffffULL
159 && (kbuf->f_files & 0xffffffff00000000ULL))
161 if (kbuf->f_ffree != 0xffffffffffffffffULL
162 && (kbuf->f_ffree & 0xffffffff00000000ULL))
165 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
166 __put_user(kbuf->f_type, &ubuf->f_type) ||
167 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
168 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
169 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
170 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
171 __put_user(kbuf->f_files, &ubuf->f_files) ||
172 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
173 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
174 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
175 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
176 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
177 __put_user(0, &ubuf->f_spare[0]) ||
178 __put_user(0, &ubuf->f_spare[1]) ||
179 __put_user(0, &ubuf->f_spare[2]) ||
180 __put_user(0, &ubuf->f_spare[3]) ||
181 __put_user(0, &ubuf->f_spare[4]))
187 * The following statfs calls are copies of code from fs/open.c and
188 * should be checked against those from time to time
190 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
195 error = user_path_walk(path, &nd);
198 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
200 error = put_compat_statfs(buf, &tmp);
206 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
216 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
218 error = put_compat_statfs(buf, &tmp);
224 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
226 if (sizeof ubuf->f_blocks == 4) {
227 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
228 0xffffffff00000000ULL)
230 /* f_files and f_ffree may be -1; it's okay
231 * to stuff that into 32 bits */
232 if (kbuf->f_files != 0xffffffffffffffffULL
233 && (kbuf->f_files & 0xffffffff00000000ULL))
235 if (kbuf->f_ffree != 0xffffffffffffffffULL
236 && (kbuf->f_ffree & 0xffffffff00000000ULL))
239 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
240 __put_user(kbuf->f_type, &ubuf->f_type) ||
241 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
242 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
243 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
244 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
245 __put_user(kbuf->f_files, &ubuf->f_files) ||
246 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
247 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
248 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
249 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
250 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
255 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
260 if (sz != sizeof(*buf))
263 error = user_path_walk(path, &nd);
266 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
268 error = put_compat_statfs64(buf, &tmp);
274 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
280 if (sz != sizeof(*buf))
287 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
289 error = put_compat_statfs64(buf, &tmp);
295 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
297 #define IOCTL_HASHSIZE 256
298 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
300 extern struct ioctl_trans ioctl_start[];
301 extern int ioctl_table_size;
303 static inline unsigned long ioctl32_hash(unsigned long cmd)
305 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
308 static void ioctl32_insert_translation(struct ioctl_trans *trans)
311 struct ioctl_trans *t;
313 hash = ioctl32_hash (trans->cmd);
314 if (!ioctl32_hash_table[hash])
315 ioctl32_hash_table[hash] = trans;
317 t = ioctl32_hash_table[hash];
325 static int __init init_sys32_ioctl(void)
329 for (i = 0; i < ioctl_table_size; i++) {
330 if (ioctl_start[i].next != 0) {
331 printk("ioctl translation %d bad\n",i);
335 ioctl32_insert_translation(&ioctl_start[i]);
340 __initcall(init_sys32_ioctl);
342 static void compat_ioctl_error(struct file *filp, unsigned int fd,
343 unsigned int cmd, unsigned long arg)
349 /* find the name of the device. */
350 path = (char *)__get_free_page(GFP_KERNEL);
352 fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
357 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
358 if (!isprint(buf[1]))
359 sprintf(buf, "%02x", buf[1]);
360 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
361 "cmd(%08x){%s} arg(%08x) on %s\n",
362 current->comm, current->pid,
363 (int)fd, (unsigned int)cmd, buf,
364 (unsigned int)arg, fn);
367 free_page((unsigned long)path);
370 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
375 struct ioctl_trans *t;
378 filp = fget_light(fd, &fput_needed);
382 /* RED-PEN how should LSM module know it's handling 32bit? */
383 error = security_file_ioctl(filp, cmd, arg);
388 * To allow the compat_ioctl handlers to be self contained
389 * we need to check the common ioctls here first.
390 * Just handle them with the standard handlers below.
403 if (S_ISREG(filp->f_dentry->d_inode->i_mode))
408 if (filp->f_op && filp->f_op->compat_ioctl) {
409 error = filp->f_op->compat_ioctl(filp, cmd, arg);
410 if (error != -ENOIOCTLCMD)
415 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
420 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
425 if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
426 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
427 error = siocdevprivate_ioctl(fd, cmd, arg);
432 compat_ioctl_error(filp, fd, cmd, arg);
441 error = t->handler(fd, cmd, arg, filp);
447 error = vfs_ioctl(filp, fd, cmd, arg);
449 fput_light(filp, fput_needed);
454 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
456 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
457 __get_user(kfl->l_type, &ufl->l_type) ||
458 __get_user(kfl->l_whence, &ufl->l_whence) ||
459 __get_user(kfl->l_start, &ufl->l_start) ||
460 __get_user(kfl->l_len, &ufl->l_len) ||
461 __get_user(kfl->l_pid, &ufl->l_pid))
466 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
468 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
469 __put_user(kfl->l_type, &ufl->l_type) ||
470 __put_user(kfl->l_whence, &ufl->l_whence) ||
471 __put_user(kfl->l_start, &ufl->l_start) ||
472 __put_user(kfl->l_len, &ufl->l_len) ||
473 __put_user(kfl->l_pid, &ufl->l_pid))
478 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
479 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
481 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
482 __get_user(kfl->l_type, &ufl->l_type) ||
483 __get_user(kfl->l_whence, &ufl->l_whence) ||
484 __get_user(kfl->l_start, &ufl->l_start) ||
485 __get_user(kfl->l_len, &ufl->l_len) ||
486 __get_user(kfl->l_pid, &ufl->l_pid))
492 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
493 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
495 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
496 __put_user(kfl->l_type, &ufl->l_type) ||
497 __put_user(kfl->l_whence, &ufl->l_whence) ||
498 __put_user(kfl->l_start, &ufl->l_start) ||
499 __put_user(kfl->l_len, &ufl->l_len) ||
500 __put_user(kfl->l_pid, &ufl->l_pid))
506 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
517 ret = get_compat_flock(&f, compat_ptr(arg));
522 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
524 if (cmd == F_GETLK && ret == 0) {
525 /* GETLK was successfule and we need to return the data...
526 * but it needs to fit in the compat structure.
527 * l_start shouldn't be too big, unless the original
528 * start + end is greater than COMPAT_OFF_T_MAX, in which
529 * case the app was asking for trouble, so we return
530 * -EOVERFLOW in that case.
531 * l_len could be too big, in which case we just truncate it,
532 * and only allow the app to see that part of the conflicting
533 * lock that might make sense to it anyway
536 if (f.l_start > COMPAT_OFF_T_MAX)
538 if (f.l_len > COMPAT_OFF_T_MAX)
539 f.l_len = COMPAT_OFF_T_MAX;
541 ret = put_compat_flock(&f, compat_ptr(arg));
548 ret = get_compat_flock64(&f, compat_ptr(arg));
553 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
554 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
557 if (cmd == F_GETLK64 && ret == 0) {
558 /* need to return lock information - see above for commentary */
559 if (f.l_start > COMPAT_LOFF_T_MAX)
561 if (f.l_len > COMPAT_LOFF_T_MAX)
562 f.l_len = COMPAT_LOFF_T_MAX;
564 ret = put_compat_flock64(&f, compat_ptr(arg));
569 ret = sys_fcntl(fd, cmd, arg);
575 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
578 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
580 return compat_sys_fcntl64(fd, cmd, arg);
584 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
589 mm_segment_t oldfs = get_fs();
590 if (unlikely(get_user(ctx64, ctx32p)))
594 /* The __user pointer cast is valid because of the set_fs() */
595 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
597 /* truncating is ok because it's a user address */
599 ret = put_user((u32) ctx64, ctx32p);
604 compat_sys_io_getevents(aio_context_t ctx_id,
605 unsigned long min_nr,
607 struct io_event __user *events,
608 struct compat_timespec __user *timeout)
612 struct timespec __user *ut = NULL;
615 if (unlikely(!access_ok(VERIFY_WRITE, events,
616 nr * sizeof(struct io_event))))
619 if (get_compat_timespec(&t, timeout))
622 ut = compat_alloc_user_space(sizeof(*ut));
623 if (copy_to_user(ut, &t, sizeof(t)) )
626 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
632 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
637 for (i = 0; i < nr; ++i) {
638 if (get_user(uptr, ptr32 + i))
640 if (put_user(compat_ptr(uptr), ptr64 + i))
646 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
649 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
651 struct iocb __user * __user *iocb64;
654 if (unlikely(nr < 0))
657 if (nr > MAX_AIO_SUBMITS)
658 nr = MAX_AIO_SUBMITS;
660 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
661 ret = copy_iocb(nr, iocb, iocb64);
663 ret = sys_io_submit(ctx_id, nr, iocb64);
667 struct compat_ncp_mount_data {
668 compat_int_t version;
669 compat_uint_t ncp_fd;
670 __compat_uid_t mounted_uid;
671 compat_pid_t wdog_pid;
672 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
673 compat_uint_t time_out;
674 compat_uint_t retry_count;
678 compat_mode_t file_mode;
679 compat_mode_t dir_mode;
682 struct compat_ncp_mount_data_v4 {
683 compat_int_t version;
684 compat_ulong_t flags;
685 compat_ulong_t mounted_uid;
686 compat_long_t wdog_pid;
687 compat_uint_t ncp_fd;
688 compat_uint_t time_out;
689 compat_uint_t retry_count;
692 compat_ulong_t file_mode;
693 compat_ulong_t dir_mode;
696 static void *do_ncp_super_data_conv(void *raw_data)
698 int version = *(unsigned int *)raw_data;
701 struct compat_ncp_mount_data *c_n = raw_data;
702 struct ncp_mount_data *n = raw_data;
704 n->dir_mode = c_n->dir_mode;
705 n->file_mode = c_n->file_mode;
708 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
709 n->wdog_pid = c_n->wdog_pid;
710 n->mounted_uid = c_n->mounted_uid;
711 } else if (version == 4) {
712 struct compat_ncp_mount_data_v4 *c_n = raw_data;
713 struct ncp_mount_data_v4 *n = raw_data;
715 n->dir_mode = c_n->dir_mode;
716 n->file_mode = c_n->file_mode;
719 n->retry_count = c_n->retry_count;
720 n->time_out = c_n->time_out;
721 n->ncp_fd = c_n->ncp_fd;
722 n->wdog_pid = c_n->wdog_pid;
723 n->mounted_uid = c_n->mounted_uid;
724 n->flags = c_n->flags;
725 } else if (version != 5) {
732 struct compat_smb_mount_data {
733 compat_int_t version;
734 __compat_uid_t mounted_uid;
737 compat_mode_t file_mode;
738 compat_mode_t dir_mode;
741 static void *do_smb_super_data_conv(void *raw_data)
743 struct smb_mount_data *s = raw_data;
744 struct compat_smb_mount_data *c_s = raw_data;
746 if (c_s->version != SMB_MOUNT_OLDVERSION)
748 s->dir_mode = c_s->dir_mode;
749 s->file_mode = c_s->file_mode;
752 s->mounted_uid = c_s->mounted_uid;
757 struct compat_nfs_string {
762 static inline void compat_nfs_string(struct nfs_string *dst,
763 struct compat_nfs_string *src)
765 dst->data = compat_ptr(src->data);
769 struct compat_nfs4_mount_data_v1 {
770 compat_int_t version;
775 compat_int_t retrans;
776 compat_int_t acregmin;
777 compat_int_t acregmax;
778 compat_int_t acdirmin;
779 compat_int_t acdirmax;
780 struct compat_nfs_string client_addr;
781 struct compat_nfs_string mnt_path;
782 struct compat_nfs_string hostname;
783 compat_uint_t host_addrlen;
784 compat_uptr_t host_addr;
786 compat_int_t auth_flavourlen;
787 compat_uptr_t auth_flavours;
790 static int do_nfs4_super_data_conv(void *raw_data)
792 int version = *(compat_uint_t *) raw_data;
795 struct compat_nfs4_mount_data_v1 *raw = raw_data;
796 struct nfs4_mount_data *real = raw_data;
798 /* copy the fields backwards */
799 real->auth_flavours = compat_ptr(raw->auth_flavours);
800 real->auth_flavourlen = raw->auth_flavourlen;
801 real->proto = raw->proto;
802 real->host_addr = compat_ptr(raw->host_addr);
803 real->host_addrlen = raw->host_addrlen;
804 compat_nfs_string(&real->hostname, &raw->hostname);
805 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
806 compat_nfs_string(&real->client_addr, &raw->client_addr);
807 real->acdirmax = raw->acdirmax;
808 real->acdirmin = raw->acdirmin;
809 real->acregmax = raw->acregmax;
810 real->acregmin = raw->acregmin;
811 real->retrans = raw->retrans;
812 real->timeo = raw->timeo;
813 real->wsize = raw->wsize;
814 real->rsize = raw->rsize;
815 real->flags = raw->flags;
816 real->version = raw->version;
825 extern int copy_mount_options (const void __user *, unsigned long *);
827 #define SMBFS_NAME "smbfs"
828 #define NCPFS_NAME "ncpfs"
829 #define NFS4_NAME "nfs4"
831 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
832 char __user * type, unsigned long flags,
835 unsigned long type_page;
836 unsigned long data_page;
837 unsigned long dev_page;
841 retval = copy_mount_options (type, &type_page);
845 dir_page = getname(dir_name);
846 retval = PTR_ERR(dir_page);
847 if (IS_ERR(dir_page))
850 retval = copy_mount_options (dev_name, &dev_page);
854 retval = copy_mount_options (data, &data_page);
861 if (!strcmp((char *)type_page, SMBFS_NAME)) {
862 do_smb_super_data_conv((void *)data_page);
863 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
864 do_ncp_super_data_conv((void *)data_page);
865 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
866 if (do_nfs4_super_data_conv((void *) data_page))
872 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
873 flags, (void*)data_page);
877 free_page(data_page);
883 free_page(type_page);
888 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
889 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
890 ~(sizeof(compat_long_t)-1))
892 struct compat_old_linux_dirent {
893 compat_ulong_t d_ino;
894 compat_ulong_t d_offset;
895 unsigned short d_namlen;
899 struct compat_readdir_callback {
900 struct compat_old_linux_dirent __user *dirent;
904 static int compat_fillonedir(void *__buf, const char *name, int namlen,
905 loff_t offset, ino_t ino, unsigned int d_type)
907 struct compat_readdir_callback *buf = __buf;
908 struct compat_old_linux_dirent __user *dirent;
913 dirent = buf->dirent;
914 if (!access_ok(VERIFY_WRITE, dirent,
915 (unsigned long)(dirent->d_name + namlen + 1) -
916 (unsigned long)dirent))
918 if ( __put_user(ino, &dirent->d_ino) ||
919 __put_user(offset, &dirent->d_offset) ||
920 __put_user(namlen, &dirent->d_namlen) ||
921 __copy_to_user(dirent->d_name, name, namlen) ||
922 __put_user(0, dirent->d_name + namlen))
926 buf->result = -EFAULT;
930 asmlinkage long compat_sys_old_readdir(unsigned int fd,
931 struct compat_old_linux_dirent __user *dirent, unsigned int count)
935 struct compat_readdir_callback buf;
945 error = vfs_readdir(file, compat_fillonedir, &buf);
954 struct compat_linux_dirent {
955 compat_ulong_t d_ino;
956 compat_ulong_t d_off;
957 unsigned short d_reclen;
961 struct compat_getdents_callback {
962 struct compat_linux_dirent __user *current_dir;
963 struct compat_linux_dirent __user *previous;
968 static int compat_filldir(void *__buf, const char *name, int namlen,
969 loff_t offset, ino_t ino, unsigned int d_type)
971 struct compat_linux_dirent __user * dirent;
972 struct compat_getdents_callback *buf = __buf;
973 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
975 buf->error = -EINVAL; /* only used if we fail.. */
976 if (reclen > buf->count)
978 dirent = buf->previous;
980 if (__put_user(offset, &dirent->d_off))
983 dirent = buf->current_dir;
984 if (__put_user(ino, &dirent->d_ino))
986 if (__put_user(reclen, &dirent->d_reclen))
988 if (copy_to_user(dirent->d_name, name, namlen))
990 if (__put_user(0, dirent->d_name + namlen))
992 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
994 buf->previous = dirent;
995 dirent = (void __user *)dirent + reclen;
996 buf->current_dir = dirent;
997 buf->count -= reclen;
1000 buf->error = -EFAULT;
1004 asmlinkage long compat_sys_getdents(unsigned int fd,
1005 struct compat_linux_dirent __user *dirent, unsigned int count)
1008 struct compat_linux_dirent __user * lastdirent;
1009 struct compat_getdents_callback buf;
1013 if (!access_ok(VERIFY_WRITE, dirent, count))
1021 buf.current_dir = dirent;
1022 buf.previous = NULL;
1026 error = vfs_readdir(file, compat_filldir, &buf);
1030 lastdirent = buf.previous;
1032 if (put_user(file->f_pos, &lastdirent->d_off))
1035 error = count - buf.count;
1044 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1045 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1047 struct compat_getdents_callback64 {
1048 struct linux_dirent64 __user *current_dir;
1049 struct linux_dirent64 __user *previous;
1054 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1055 ino_t ino, unsigned int d_type)
1057 struct linux_dirent64 __user *dirent;
1058 struct compat_getdents_callback64 *buf = __buf;
1059 int jj = NAME_OFFSET(dirent);
1060 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1063 buf->error = -EINVAL; /* only used if we fail.. */
1064 if (reclen > buf->count)
1066 dirent = buf->previous;
1069 if (__put_user_unaligned(offset, &dirent->d_off))
1072 dirent = buf->current_dir;
1073 if (__put_user_unaligned(ino, &dirent->d_ino))
1076 if (__put_user_unaligned(off, &dirent->d_off))
1078 if (__put_user(reclen, &dirent->d_reclen))
1080 if (__put_user(d_type, &dirent->d_type))
1082 if (copy_to_user(dirent->d_name, name, namlen))
1084 if (__put_user(0, dirent->d_name + namlen))
1086 buf->previous = dirent;
1087 dirent = (void __user *)dirent + reclen;
1088 buf->current_dir = dirent;
1089 buf->count -= reclen;
1092 buf->error = -EFAULT;
1096 asmlinkage long compat_sys_getdents64(unsigned int fd,
1097 struct linux_dirent64 __user * dirent, unsigned int count)
1100 struct linux_dirent64 __user * lastdirent;
1101 struct compat_getdents_callback64 buf;
1105 if (!access_ok(VERIFY_WRITE, dirent, count))
1113 buf.current_dir = dirent;
1114 buf.previous = NULL;
1118 error = vfs_readdir(file, compat_filldir64, &buf);
1122 lastdirent = buf.previous;
1124 typeof(lastdirent->d_off) d_off = file->f_pos;
1125 __put_user_unaligned(d_off, &lastdirent->d_off);
1126 error = count - buf.count;
1134 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1136 static ssize_t compat_do_readv_writev(int type, struct file *file,
1137 const struct compat_iovec __user *uvector,
1138 unsigned long nr_segs, loff_t *pos)
1140 typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
1141 typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
1143 compat_ssize_t tot_len;
1144 struct iovec iovstack[UIO_FASTIOV];
1145 struct iovec *iov=iovstack, *vector;
1152 * SuS says "The readv() function *may* fail if the iovcnt argument
1153 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1154 * traditionally returned zero for zero segments, so...
1161 * First get the "struct iovec" from user memory and
1162 * verify all the pointers
1165 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1169 if (nr_segs > UIO_FASTIOV) {
1171 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1176 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1180 * Single unix specification:
1181 * We should -EINVAL if an element length is not >= 0 and fitting an
1182 * ssize_t. The total length is fitting an ssize_t
1184 * Be careful here because iov_len is a size_t not an ssize_t
1189 for (seg = 0 ; seg < nr_segs; seg++) {
1190 compat_ssize_t tmp = tot_len;
1194 if (__get_user(len, &uvector->iov_len) ||
1195 __get_user(buf, &uvector->iov_base)) {
1199 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1202 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1204 vector->iov_base = compat_ptr(buf);
1205 vector->iov_len = (compat_size_t) len;
1214 ret = rw_verify_area(type, file, pos, tot_len);
1220 fn = file->f_op->read;
1221 fnv = file->f_op->readv;
1223 fn = (io_fn_t)file->f_op->write;
1224 fnv = file->f_op->writev;
1227 ret = fnv(file, iov, nr_segs, pos);
1231 /* Do it by hand, with file-ops */
1234 while (nr_segs > 0) {
1239 base = vector->iov_base;
1240 len = vector->iov_len;
1244 nr = fn(file, base, len, pos);
1255 if (iov != iovstack)
1257 if ((ret + (type == READ)) > 0) {
1258 struct dentry *dentry = file->f_dentry;
1260 fsnotify_access(dentry);
1262 fsnotify_modify(dentry);
1268 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1271 ssize_t ret = -EBADF;
1277 if (!(file->f_mode & FMODE_READ))
1281 if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
1284 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1292 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1295 ssize_t ret = -EBADF;
1300 if (!(file->f_mode & FMODE_WRITE))
1304 if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
1307 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1315 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1319 compat_sys_open(const char __user *filename, int flags, int mode)
1321 return do_sys_open(AT_FDCWD, filename, flags, mode);
1325 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1329 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1331 return do_sys_open(dfd, filename, flags, mode);
1335 * compat_count() counts the number of arguments/envelopes. It is basically
1336 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1337 * and envp pointers.
1339 static int compat_count(compat_uptr_t __user *argv, int max)
1347 if (get_user(p, argv))
1360 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1361 * except that it works with 32 bit argv and envp pointers.
1363 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1364 struct linux_binprm *bprm)
1366 struct page *kmapped_page = NULL;
1370 while (argc-- > 0) {
1375 if (get_user(str, argv+argc) ||
1376 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1381 if (bprm->p < len) {
1387 /* XXX: add architecture specific overflow check here. */
1392 int offset, bytes_to_copy;
1395 offset = pos % PAGE_SIZE;
1397 page = bprm->page[i];
1400 page = alloc_page(GFP_HIGHUSER);
1401 bprm->page[i] = page;
1409 if (page != kmapped_page) {
1411 kunmap(kmapped_page);
1412 kmapped_page = page;
1413 kaddr = kmap(kmapped_page);
1416 memset(kaddr, 0, offset);
1417 bytes_to_copy = PAGE_SIZE - offset;
1418 if (bytes_to_copy > len) {
1419 bytes_to_copy = len;
1421 memset(kaddr+offset+len, 0,
1422 PAGE_SIZE-offset-len);
1424 err = copy_from_user(kaddr+offset, compat_ptr(str),
1431 pos += bytes_to_copy;
1432 str += bytes_to_copy;
1433 len -= bytes_to_copy;
1439 kunmap(kmapped_page);
1445 #define free_arg_pages(bprm) do { } while (0)
1449 static inline void free_arg_pages(struct linux_binprm *bprm)
1453 for (i = 0; i < MAX_ARG_PAGES; i++) {
1455 __free_page(bprm->page[i]);
1456 bprm->page[i] = NULL;
1460 #endif /* CONFIG_MMU */
1463 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1464 * that it processes 32 bit argv and envp pointers.
1466 int compat_do_execve(char * filename,
1467 compat_uptr_t __user *argv,
1468 compat_uptr_t __user *envp,
1469 struct pt_regs * regs)
1471 struct linux_binprm *bprm;
1477 bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
1480 memset(bprm, 0, sizeof(*bprm));
1482 file = open_exec(filename);
1483 retval = PTR_ERR(file);
1489 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1491 bprm->filename = filename;
1492 bprm->interp = filename;
1493 bprm->mm = mm_alloc();
1498 retval = init_new_context(current, bprm->mm);
1502 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1503 if ((retval = bprm->argc) < 0)
1506 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1507 if ((retval = bprm->envc) < 0)
1510 retval = security_bprm_alloc(bprm);
1514 retval = prepare_binprm(bprm);
1518 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1522 bprm->exec = bprm->p;
1523 retval = compat_copy_strings(bprm->envc, envp, bprm);
1527 retval = compat_copy_strings(bprm->argc, argv, bprm);
1531 retval = search_binary_handler(bprm, regs);
1533 free_arg_pages(bprm);
1535 /* execve success */
1536 security_bprm_free(bprm);
1537 acct_update_integrals(current);
1543 /* Something went wrong, return the inode and free the argument pages*/
1544 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1545 struct page * page = bprm->page[i];
1551 security_bprm_free(bprm);
1559 allow_write_access(bprm->file);
1570 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1572 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1575 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1576 * 64-bit unsigned longs.
1579 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1580 unsigned long *fdset)
1582 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1586 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1593 __get_user(l, ufdset);
1594 __get_user(h, ufdset+1);
1596 *fdset++ = h << 32 | l;
1600 __get_user(*fdset, ufdset);
1602 /* Tricky, must clear full unsigned long in the
1603 * kernel fdset at the end, this makes sure that
1606 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1612 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1613 unsigned long *fdset)
1616 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1627 __put_user(l, ufdset);
1628 __put_user(h, ufdset+1);
1633 __put_user(*fdset, ufdset);
1638 * This is a virtual copy of sys_select from fs/select.c and probably
1639 * should be compared to it from time to time
1641 static void *select_bits_alloc(int size)
1643 return kmalloc(6 * size, GFP_KERNEL);
1646 static void select_bits_free(void *bits, int size)
1652 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1653 * like to be certain this leads to no problems. So I return
1654 * EINTR just for safety.
1656 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1657 * I'm trying ERESTARTNOHAND which restart only when you want to.
1659 #define MAX_SELECT_SECONDS \
1660 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1662 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1663 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1667 int size, max_fdset, ret = -EINVAL;
1668 struct fdtable *fdt;
1673 /* max_fdset can increase, so grab it once to avoid race */
1675 fdt = files_fdtable(current->files);
1676 max_fdset = fdt->max_fdset;
1682 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1683 * since we used fdset we need to allocate memory in units of
1687 size = FDS_BYTES(n);
1688 bits = select_bits_alloc(size);
1691 fds.in = (unsigned long *) bits;
1692 fds.out = (unsigned long *) (bits + size);
1693 fds.ex = (unsigned long *) (bits + 2*size);
1694 fds.res_in = (unsigned long *) (bits + 3*size);
1695 fds.res_out = (unsigned long *) (bits + 4*size);
1696 fds.res_ex = (unsigned long *) (bits + 5*size);
1698 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1699 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1700 (ret = compat_get_fd_set(n, exp, fds.ex)))
1702 zero_fd_set(n, fds.res_in);
1703 zero_fd_set(n, fds.res_out);
1704 zero_fd_set(n, fds.res_ex);
1706 ret = do_select(n, &fds, timeout);
1711 ret = -ERESTARTNOHAND;
1712 if (signal_pending(current))
1717 compat_set_fd_set(n, inp, fds.res_in);
1718 compat_set_fd_set(n, outp, fds.res_out);
1719 compat_set_fd_set(n, exp, fds.res_ex);
1722 select_bits_free(bits, size);
1727 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1728 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1729 struct compat_timeval __user *tvp)
1732 struct compat_timeval tv;
1736 if (copy_from_user(&tv, tvp, sizeof(tv)))
1739 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1742 /* Cast to u64 to make GCC stop complaining */
1743 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1744 timeout = -1; /* infinite */
1746 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1747 timeout += tv.tv_sec * HZ;
1751 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1754 struct compat_timeval rtv;
1756 if (current->personality & STICKY_TIMEOUTS)
1758 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1759 rtv.tv_sec = timeout;
1760 if (compat_timeval_compare(&rtv, &tv) >= 0)
1762 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1765 * If an application puts its timeval in read-only
1766 * memory, we don't want the Linux-specific update to
1767 * the timeval to cause a fault after the select has
1768 * completed successfully. However, because we're not
1769 * updating the timeval, we can't restart the system
1772 if (ret == -ERESTARTNOHAND)
1780 #ifdef TIF_RESTORE_SIGMASK
1781 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1782 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1783 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1784 compat_size_t sigsetsize)
1786 compat_sigset_t ss32;
1787 sigset_t ksigmask, sigsaved;
1788 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1789 struct compat_timespec ts;
1793 if (copy_from_user(&ts, tsp, sizeof(ts)))
1796 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1801 if (sigsetsize != sizeof(compat_sigset_t))
1803 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1805 sigset_from_compat(&ksigmask, &ss32);
1807 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1808 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1813 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1814 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1815 timeout += ts.tv_sec * (unsigned long)HZ;
1819 ts.tv_sec -= MAX_SELECT_SECONDS;
1820 timeout = MAX_SELECT_SECONDS * HZ;
1824 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1826 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1828 if (tsp && !(current->personality & STICKY_TIMEOUTS)) {
1829 struct compat_timespec rts;
1831 rts.tv_sec = timeout / HZ;
1832 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1833 if (rts.tv_nsec >= NSEC_PER_SEC) {
1835 rts.tv_nsec -= NSEC_PER_SEC;
1837 if (compat_timespec_compare(&rts, &ts) >= 0)
1839 copy_to_user(tsp, &rts, sizeof(rts));
1842 if (ret == -ERESTARTNOHAND) {
1844 * Don't restore the signal mask yet. Let do_signal() deliver
1845 * the signal on the way back to userspace, before the signal
1849 memcpy(¤t->saved_sigmask, &sigsaved,
1851 set_thread_flag(TIF_RESTORE_SIGMASK);
1854 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1859 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1860 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1861 struct compat_timespec __user *tsp, void __user *sig)
1863 compat_size_t sigsetsize = 0;
1864 compat_uptr_t up = 0;
1867 if (!access_ok(VERIFY_READ, sig,
1868 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1869 __get_user(up, (compat_uptr_t __user *)sig) ||
1870 __get_user(sigsetsize,
1871 (compat_size_t __user *)(sig+sizeof(up))))
1874 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1878 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1879 unsigned int nfds, struct compat_timespec __user *tsp,
1880 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1882 compat_sigset_t ss32;
1883 sigset_t ksigmask, sigsaved;
1884 struct compat_timespec ts;
1889 if (copy_from_user(&ts, tsp, sizeof(ts)))
1892 /* We assume that ts.tv_sec is always lower than
1893 the number of seconds that can be expressed in
1894 an s64. Otherwise the compiler bitches at us */
1895 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1896 timeout += ts.tv_sec * HZ;
1900 if (sigsetsize |= sizeof(compat_sigset_t))
1902 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1904 sigset_from_compat(&ksigmask, &ss32);
1906 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1907 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1910 ret = do_sys_poll(ufds, nfds, &timeout);
1912 /* We can restart this syscall, usually */
1913 if (ret == -EINTR) {
1915 * Don't restore the signal mask yet. Let do_signal() deliver
1916 * the signal on the way back to userspace, before the signal
1920 memcpy(¤t->saved_sigmask, &sigsaved,
1922 set_thread_flag(TIF_RESTORE_SIGMASK);
1924 ret = -ERESTARTNOHAND;
1926 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1928 if (tsp && timeout >= 0) {
1929 struct compat_timespec rts;
1931 if (current->personality & STICKY_TIMEOUTS)
1933 /* Yes, we know it's actually an s64, but it's also positive. */
1934 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1936 rts.tv_sec = timeout;
1937 if (compat_timespec_compare(&rts, &ts) >= 0)
1939 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1942 * If an application puts its timeval in read-only
1943 * memory, we don't want the Linux-specific update to
1944 * the timeval to cause a fault after the select has
1945 * completed successfully. However, because we're not
1946 * updating the timeval, we can't restart the system
1949 if (ret == -ERESTARTNOHAND && timeout >= 0)
1956 #endif /* TIF_RESTORE_SIGMASK */
1958 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1959 /* Stuff for NFS server syscalls... */
1960 struct compat_nfsctl_svc {
1965 struct compat_nfsctl_client {
1966 s8 cl32_ident[NFSCLNT_IDMAX+1];
1968 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1971 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1974 struct compat_nfsctl_export {
1975 char ex32_client[NFSCLNT_IDMAX+1];
1976 char ex32_path[NFS_MAXPATHLEN+1];
1977 compat_dev_t ex32_dev;
1978 compat_ino_t ex32_ino;
1979 compat_int_t ex32_flags;
1980 __compat_uid_t ex32_anon_uid;
1981 __compat_gid_t ex32_anon_gid;
1984 struct compat_nfsctl_fdparm {
1985 struct sockaddr gd32_addr;
1986 s8 gd32_path[NFS_MAXPATHLEN+1];
1987 compat_int_t gd32_version;
1990 struct compat_nfsctl_fsparm {
1991 struct sockaddr gd32_addr;
1992 s8 gd32_path[NFS_MAXPATHLEN+1];
1993 compat_int_t gd32_maxlen;
1996 struct compat_nfsctl_arg {
1997 compat_int_t ca32_version; /* safeguard */
1999 struct compat_nfsctl_svc u32_svc;
2000 struct compat_nfsctl_client u32_client;
2001 struct compat_nfsctl_export u32_export;
2002 struct compat_nfsctl_fdparm u32_getfd;
2003 struct compat_nfsctl_fsparm u32_getfs;
2005 #define ca32_svc u.u32_svc
2006 #define ca32_client u.u32_client
2007 #define ca32_export u.u32_export
2008 #define ca32_getfd u.u32_getfd
2009 #define ca32_getfs u.u32_getfs
2012 union compat_nfsctl_res {
2013 __u8 cr32_getfh[NFS_FHSIZE];
2014 struct knfsd_fh cr32_getfs;
2017 static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2021 err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
2022 err |= get_user(karg->ca_version, &arg->ca32_version);
2023 err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
2024 err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
2025 return (err) ? -EFAULT : 0;
2028 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2032 err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
2033 err |= get_user(karg->ca_version, &arg->ca32_version);
2034 err |= __copy_from_user(&karg->ca_client.cl_ident[0],
2035 &arg->ca32_client.cl32_ident[0],
2037 err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
2038 err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
2039 &arg->ca32_client.cl32_addrlist[0],
2040 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
2041 err |= __get_user(karg->ca_client.cl_fhkeytype,
2042 &arg->ca32_client.cl32_fhkeytype);
2043 err |= __get_user(karg->ca_client.cl_fhkeylen,
2044 &arg->ca32_client.cl32_fhkeylen);
2045 err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
2046 &arg->ca32_client.cl32_fhkey[0],
2049 return (err) ? -EFAULT : 0;
2052 static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2056 err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
2057 err |= get_user(karg->ca_version, &arg->ca32_version);
2058 err |= __copy_from_user(&karg->ca_export.ex_client[0],
2059 &arg->ca32_export.ex32_client[0],
2061 err |= __copy_from_user(&karg->ca_export.ex_path[0],
2062 &arg->ca32_export.ex32_path[0],
2064 err |= __get_user(karg->ca_export.ex_dev,
2065 &arg->ca32_export.ex32_dev);
2066 err |= __get_user(karg->ca_export.ex_ino,
2067 &arg->ca32_export.ex32_ino);
2068 err |= __get_user(karg->ca_export.ex_flags,
2069 &arg->ca32_export.ex32_flags);
2070 err |= __get_user(karg->ca_export.ex_anon_uid,
2071 &arg->ca32_export.ex32_anon_uid);
2072 err |= __get_user(karg->ca_export.ex_anon_gid,
2073 &arg->ca32_export.ex32_anon_gid);
2074 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2075 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2077 return (err) ? -EFAULT : 0;
2080 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2084 err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
2085 err |= get_user(karg->ca_version, &arg->ca32_version);
2086 err |= __copy_from_user(&karg->ca_getfd.gd_addr,
2087 &arg->ca32_getfd.gd32_addr,
2088 (sizeof(struct sockaddr)));
2089 err |= __copy_from_user(&karg->ca_getfd.gd_path,
2090 &arg->ca32_getfd.gd32_path,
2091 (NFS_MAXPATHLEN+1));
2092 err |= __get_user(karg->ca_getfd.gd_version,
2093 &arg->ca32_getfd.gd32_version);
2095 return (err) ? -EFAULT : 0;
2098 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
2102 err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
2103 err |= get_user(karg->ca_version, &arg->ca32_version);
2104 err |= __copy_from_user(&karg->ca_getfs.gd_addr,
2105 &arg->ca32_getfs.gd32_addr,
2106 (sizeof(struct sockaddr)));
2107 err |= __copy_from_user(&karg->ca_getfs.gd_path,
2108 &arg->ca32_getfs.gd32_path,
2109 (NFS_MAXPATHLEN+1));
2110 err |= __get_user(karg->ca_getfs.gd_maxlen,
2111 &arg->ca32_getfs.gd32_maxlen);
2113 return (err) ? -EFAULT : 0;
2116 /* This really doesn't need translations, we are only passing
2117 * back a union which contains opaque nfs file handle data.
2119 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
2123 err = copy_to_user(res, kres, sizeof(*res));
2125 return (err) ? -EFAULT : 0;
2128 asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
2129 union compat_nfsctl_res __user *res)
2131 struct nfsctl_arg *karg;
2132 union nfsctl_res *kres;
2136 karg = kmalloc(sizeof(*karg), GFP_USER);
2137 kres = kmalloc(sizeof(*kres), GFP_USER);
2138 if(!karg || !kres) {
2145 err = compat_nfs_svc_trans(karg, arg);
2148 case NFSCTL_ADDCLIENT:
2149 err = compat_nfs_clnt_trans(karg, arg);
2152 case NFSCTL_DELCLIENT:
2153 err = compat_nfs_clnt_trans(karg, arg);
2157 case NFSCTL_UNEXPORT:
2158 err = compat_nfs_exp_trans(karg, arg);
2162 err = compat_nfs_getfd_trans(karg, arg);
2166 err = compat_nfs_getfs_trans(karg, arg);
2176 /* The __user pointer casts are valid because of the set_fs() */
2177 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2183 if((cmd == NFSCTL_GETFD) ||
2184 (cmd == NFSCTL_GETFS))
2185 err = compat_nfs_getfh_res_trans(kres, res);
2193 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2195 return sys_ni_syscall();