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/tsacct_kern.h>
48 #include <linux/highmem.h>
49 #include <linux/poll.h>
52 #include <net/sock.h> /* siocdevprivate_ioctl */
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)
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);
93 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
98 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
99 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
100 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
101 get_user(tv[1].tv_usec, &t[1].tv_usec))
104 return do_utimes(dfd, filename, t ? tv : NULL);
107 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
109 return compat_sys_futimesat(AT_FDCWD, filename, t);
112 asmlinkage long compat_sys_newstat(char __user * filename,
113 struct compat_stat __user *statbuf)
116 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
119 error = cp_compat_stat(&stat, statbuf);
123 asmlinkage long compat_sys_newlstat(char __user * filename,
124 struct compat_stat __user *statbuf)
127 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
130 error = cp_compat_stat(&stat, statbuf);
134 #ifndef __ARCH_WANT_STAT64
135 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
136 struct compat_stat __user *statbuf, int flag)
141 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
144 if (flag & AT_SYMLINK_NOFOLLOW)
145 error = vfs_lstat_fd(dfd, filename, &stat);
147 error = vfs_stat_fd(dfd, filename, &stat);
150 error = cp_compat_stat(&stat, statbuf);
157 asmlinkage long compat_sys_newfstat(unsigned int fd,
158 struct compat_stat __user * statbuf)
161 int error = vfs_fstat(fd, &stat);
164 error = cp_compat_stat(&stat, statbuf);
168 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
171 if (sizeof ubuf->f_blocks == 4) {
172 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
173 0xffffffff00000000ULL)
175 /* f_files and f_ffree may be -1; it's okay
176 * to stuff that into 32 bits */
177 if (kbuf->f_files != 0xffffffffffffffffULL
178 && (kbuf->f_files & 0xffffffff00000000ULL))
180 if (kbuf->f_ffree != 0xffffffffffffffffULL
181 && (kbuf->f_ffree & 0xffffffff00000000ULL))
184 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
185 __put_user(kbuf->f_type, &ubuf->f_type) ||
186 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
187 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
188 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
189 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
190 __put_user(kbuf->f_files, &ubuf->f_files) ||
191 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
192 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
193 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
194 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
195 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
196 __put_user(0, &ubuf->f_spare[0]) ||
197 __put_user(0, &ubuf->f_spare[1]) ||
198 __put_user(0, &ubuf->f_spare[2]) ||
199 __put_user(0, &ubuf->f_spare[3]) ||
200 __put_user(0, &ubuf->f_spare[4]))
206 * The following statfs calls are copies of code from fs/open.c and
207 * should be checked against those from time to time
209 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
214 error = user_path_walk(path, &nd);
217 error = vfs_statfs(nd.dentry, &tmp);
219 error = put_compat_statfs(buf, &tmp);
225 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
235 error = vfs_statfs(file->f_dentry, &tmp);
237 error = put_compat_statfs(buf, &tmp);
243 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
245 if (sizeof ubuf->f_blocks == 4) {
246 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
247 0xffffffff00000000ULL)
249 /* f_files and f_ffree may be -1; it's okay
250 * to stuff that into 32 bits */
251 if (kbuf->f_files != 0xffffffffffffffffULL
252 && (kbuf->f_files & 0xffffffff00000000ULL))
254 if (kbuf->f_ffree != 0xffffffffffffffffULL
255 && (kbuf->f_ffree & 0xffffffff00000000ULL))
258 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
259 __put_user(kbuf->f_type, &ubuf->f_type) ||
260 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
261 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
262 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
263 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
264 __put_user(kbuf->f_files, &ubuf->f_files) ||
265 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
266 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
267 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
268 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
269 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
274 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
279 if (sz != sizeof(*buf))
282 error = user_path_walk(path, &nd);
285 error = vfs_statfs(nd.dentry, &tmp);
287 error = put_compat_statfs64(buf, &tmp);
293 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
299 if (sz != sizeof(*buf))
306 error = vfs_statfs(file->f_dentry, &tmp);
308 error = put_compat_statfs64(buf, &tmp);
314 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
316 #define IOCTL_HASHSIZE 256
317 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
319 static inline unsigned long ioctl32_hash(unsigned long cmd)
321 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
324 static void ioctl32_insert_translation(struct ioctl_trans *trans)
327 struct ioctl_trans *t;
329 hash = ioctl32_hash (trans->cmd);
330 if (!ioctl32_hash_table[hash])
331 ioctl32_hash_table[hash] = trans;
333 t = ioctl32_hash_table[hash];
341 static int __init init_sys32_ioctl(void)
345 for (i = 0; i < ioctl_table_size; i++) {
346 if (ioctl_start[i].next != 0) {
347 printk("ioctl translation %d bad\n",i);
351 ioctl32_insert_translation(&ioctl_start[i]);
356 __initcall(init_sys32_ioctl);
358 static void compat_ioctl_error(struct file *filp, unsigned int fd,
359 unsigned int cmd, unsigned long arg)
365 /* find the name of the device. */
366 path = (char *)__get_free_page(GFP_KERNEL);
368 fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
373 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
374 if (!isprint(buf[1]))
375 sprintf(buf, "%02x", buf[1]);
376 compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
377 "cmd(%08x){%s} arg(%08x) on %s\n",
378 current->comm, current->pid,
379 (int)fd, (unsigned int)cmd, buf,
380 (unsigned int)arg, fn);
383 free_page((unsigned long)path);
386 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
391 struct ioctl_trans *t;
394 filp = fget_light(fd, &fput_needed);
398 /* RED-PEN how should LSM module know it's handling 32bit? */
399 error = security_file_ioctl(filp, cmd, arg);
404 * To allow the compat_ioctl handlers to be self contained
405 * we need to check the common ioctls here first.
406 * Just handle them with the standard handlers below.
419 if (S_ISREG(filp->f_dentry->d_inode->i_mode))
424 if (filp->f_op && filp->f_op->compat_ioctl) {
425 error = filp->f_op->compat_ioctl(filp, cmd, arg);
426 if (error != -ENOIOCTLCMD)
431 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
436 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
441 if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
442 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
443 error = siocdevprivate_ioctl(fd, cmd, arg);
448 compat_ioctl_error(filp, fd, cmd, arg);
457 error = t->handler(fd, cmd, arg, filp);
463 error = vfs_ioctl(filp, fd, cmd, arg);
465 fput_light(filp, fput_needed);
470 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
472 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
473 __get_user(kfl->l_type, &ufl->l_type) ||
474 __get_user(kfl->l_whence, &ufl->l_whence) ||
475 __get_user(kfl->l_start, &ufl->l_start) ||
476 __get_user(kfl->l_len, &ufl->l_len) ||
477 __get_user(kfl->l_pid, &ufl->l_pid))
482 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
484 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
485 __put_user(kfl->l_type, &ufl->l_type) ||
486 __put_user(kfl->l_whence, &ufl->l_whence) ||
487 __put_user(kfl->l_start, &ufl->l_start) ||
488 __put_user(kfl->l_len, &ufl->l_len) ||
489 __put_user(kfl->l_pid, &ufl->l_pid))
494 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
495 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
497 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
498 __get_user(kfl->l_type, &ufl->l_type) ||
499 __get_user(kfl->l_whence, &ufl->l_whence) ||
500 __get_user(kfl->l_start, &ufl->l_start) ||
501 __get_user(kfl->l_len, &ufl->l_len) ||
502 __get_user(kfl->l_pid, &ufl->l_pid))
508 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
509 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
511 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
512 __put_user(kfl->l_type, &ufl->l_type) ||
513 __put_user(kfl->l_whence, &ufl->l_whence) ||
514 __put_user(kfl->l_start, &ufl->l_start) ||
515 __put_user(kfl->l_len, &ufl->l_len) ||
516 __put_user(kfl->l_pid, &ufl->l_pid))
522 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
533 ret = get_compat_flock(&f, compat_ptr(arg));
538 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
540 if (cmd == F_GETLK && ret == 0) {
541 /* GETLK was successfule and we need to return the data...
542 * but it needs to fit in the compat structure.
543 * l_start shouldn't be too big, unless the original
544 * start + end is greater than COMPAT_OFF_T_MAX, in which
545 * case the app was asking for trouble, so we return
546 * -EOVERFLOW in that case.
547 * l_len could be too big, in which case we just truncate it,
548 * and only allow the app to see that part of the conflicting
549 * lock that might make sense to it anyway
552 if (f.l_start > COMPAT_OFF_T_MAX)
554 if (f.l_len > COMPAT_OFF_T_MAX)
555 f.l_len = COMPAT_OFF_T_MAX;
557 ret = put_compat_flock(&f, compat_ptr(arg));
564 ret = get_compat_flock64(&f, compat_ptr(arg));
569 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
570 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
573 if (cmd == F_GETLK64 && ret == 0) {
574 /* need to return lock information - see above for commentary */
575 if (f.l_start > COMPAT_LOFF_T_MAX)
577 if (f.l_len > COMPAT_LOFF_T_MAX)
578 f.l_len = COMPAT_LOFF_T_MAX;
580 ret = put_compat_flock64(&f, compat_ptr(arg));
585 ret = sys_fcntl(fd, cmd, arg);
591 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
594 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
596 return compat_sys_fcntl64(fd, cmd, arg);
600 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
605 mm_segment_t oldfs = get_fs();
606 if (unlikely(get_user(ctx64, ctx32p)))
610 /* The __user pointer cast is valid because of the set_fs() */
611 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
613 /* truncating is ok because it's a user address */
615 ret = put_user((u32) ctx64, ctx32p);
620 compat_sys_io_getevents(aio_context_t ctx_id,
621 unsigned long min_nr,
623 struct io_event __user *events,
624 struct compat_timespec __user *timeout)
628 struct timespec __user *ut = NULL;
631 if (unlikely(!access_ok(VERIFY_WRITE, events,
632 nr * sizeof(struct io_event))))
635 if (get_compat_timespec(&t, timeout))
638 ut = compat_alloc_user_space(sizeof(*ut));
639 if (copy_to_user(ut, &t, sizeof(t)) )
642 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
648 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
653 for (i = 0; i < nr; ++i) {
654 if (get_user(uptr, ptr32 + i))
656 if (put_user(compat_ptr(uptr), ptr64 + i))
662 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
665 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
667 struct iocb __user * __user *iocb64;
670 if (unlikely(nr < 0))
673 if (nr > MAX_AIO_SUBMITS)
674 nr = MAX_AIO_SUBMITS;
676 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
677 ret = copy_iocb(nr, iocb, iocb64);
679 ret = sys_io_submit(ctx_id, nr, iocb64);
683 struct compat_ncp_mount_data {
684 compat_int_t version;
685 compat_uint_t ncp_fd;
686 __compat_uid_t mounted_uid;
687 compat_pid_t wdog_pid;
688 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
689 compat_uint_t time_out;
690 compat_uint_t retry_count;
694 compat_mode_t file_mode;
695 compat_mode_t dir_mode;
698 struct compat_ncp_mount_data_v4 {
699 compat_int_t version;
700 compat_ulong_t flags;
701 compat_ulong_t mounted_uid;
702 compat_long_t wdog_pid;
703 compat_uint_t ncp_fd;
704 compat_uint_t time_out;
705 compat_uint_t retry_count;
708 compat_ulong_t file_mode;
709 compat_ulong_t dir_mode;
712 static void *do_ncp_super_data_conv(void *raw_data)
714 int version = *(unsigned int *)raw_data;
717 struct compat_ncp_mount_data *c_n = raw_data;
718 struct ncp_mount_data *n = raw_data;
720 n->dir_mode = c_n->dir_mode;
721 n->file_mode = c_n->file_mode;
724 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
725 n->wdog_pid = c_n->wdog_pid;
726 n->mounted_uid = c_n->mounted_uid;
727 } else if (version == 4) {
728 struct compat_ncp_mount_data_v4 *c_n = raw_data;
729 struct ncp_mount_data_v4 *n = raw_data;
731 n->dir_mode = c_n->dir_mode;
732 n->file_mode = c_n->file_mode;
735 n->retry_count = c_n->retry_count;
736 n->time_out = c_n->time_out;
737 n->ncp_fd = c_n->ncp_fd;
738 n->wdog_pid = c_n->wdog_pid;
739 n->mounted_uid = c_n->mounted_uid;
740 n->flags = c_n->flags;
741 } else if (version != 5) {
748 struct compat_smb_mount_data {
749 compat_int_t version;
750 __compat_uid_t mounted_uid;
753 compat_mode_t file_mode;
754 compat_mode_t dir_mode;
757 static void *do_smb_super_data_conv(void *raw_data)
759 struct smb_mount_data *s = raw_data;
760 struct compat_smb_mount_data *c_s = raw_data;
762 if (c_s->version != SMB_MOUNT_OLDVERSION)
764 s->dir_mode = c_s->dir_mode;
765 s->file_mode = c_s->file_mode;
768 s->mounted_uid = c_s->mounted_uid;
773 struct compat_nfs_string {
778 static inline void compat_nfs_string(struct nfs_string *dst,
779 struct compat_nfs_string *src)
781 dst->data = compat_ptr(src->data);
785 struct compat_nfs4_mount_data_v1 {
786 compat_int_t version;
791 compat_int_t retrans;
792 compat_int_t acregmin;
793 compat_int_t acregmax;
794 compat_int_t acdirmin;
795 compat_int_t acdirmax;
796 struct compat_nfs_string client_addr;
797 struct compat_nfs_string mnt_path;
798 struct compat_nfs_string hostname;
799 compat_uint_t host_addrlen;
800 compat_uptr_t host_addr;
802 compat_int_t auth_flavourlen;
803 compat_uptr_t auth_flavours;
806 static int do_nfs4_super_data_conv(void *raw_data)
808 int version = *(compat_uint_t *) raw_data;
811 struct compat_nfs4_mount_data_v1 *raw = raw_data;
812 struct nfs4_mount_data *real = raw_data;
814 /* copy the fields backwards */
815 real->auth_flavours = compat_ptr(raw->auth_flavours);
816 real->auth_flavourlen = raw->auth_flavourlen;
817 real->proto = raw->proto;
818 real->host_addr = compat_ptr(raw->host_addr);
819 real->host_addrlen = raw->host_addrlen;
820 compat_nfs_string(&real->hostname, &raw->hostname);
821 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
822 compat_nfs_string(&real->client_addr, &raw->client_addr);
823 real->acdirmax = raw->acdirmax;
824 real->acdirmin = raw->acdirmin;
825 real->acregmax = raw->acregmax;
826 real->acregmin = raw->acregmin;
827 real->retrans = raw->retrans;
828 real->timeo = raw->timeo;
829 real->wsize = raw->wsize;
830 real->rsize = raw->rsize;
831 real->flags = raw->flags;
832 real->version = raw->version;
841 #define SMBFS_NAME "smbfs"
842 #define NCPFS_NAME "ncpfs"
843 #define NFS4_NAME "nfs4"
845 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
846 char __user * type, unsigned long flags,
849 unsigned long type_page;
850 unsigned long data_page;
851 unsigned long dev_page;
855 retval = copy_mount_options (type, &type_page);
859 dir_page = getname(dir_name);
860 retval = PTR_ERR(dir_page);
861 if (IS_ERR(dir_page))
864 retval = copy_mount_options (dev_name, &dev_page);
868 retval = copy_mount_options (data, &data_page);
875 if (!strcmp((char *)type_page, SMBFS_NAME)) {
876 do_smb_super_data_conv((void *)data_page);
877 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
878 do_ncp_super_data_conv((void *)data_page);
879 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
880 if (do_nfs4_super_data_conv((void *) data_page))
886 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
887 flags, (void*)data_page);
891 free_page(data_page);
897 free_page(type_page);
902 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
903 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
904 ~(sizeof(compat_long_t)-1))
906 struct compat_old_linux_dirent {
907 compat_ulong_t d_ino;
908 compat_ulong_t d_offset;
909 unsigned short d_namlen;
913 struct compat_readdir_callback {
914 struct compat_old_linux_dirent __user *dirent;
918 static int compat_fillonedir(void *__buf, const char *name, int namlen,
919 loff_t offset, u64 ino, unsigned int d_type)
921 struct compat_readdir_callback *buf = __buf;
922 struct compat_old_linux_dirent __user *dirent;
923 compat_ulong_t d_ino;
928 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
931 dirent = buf->dirent;
932 if (!access_ok(VERIFY_WRITE, dirent,
933 (unsigned long)(dirent->d_name + namlen + 1) -
934 (unsigned long)dirent))
936 if ( __put_user(d_ino, &dirent->d_ino) ||
937 __put_user(offset, &dirent->d_offset) ||
938 __put_user(namlen, &dirent->d_namlen) ||
939 __copy_to_user(dirent->d_name, name, namlen) ||
940 __put_user(0, dirent->d_name + namlen))
944 buf->result = -EFAULT;
948 asmlinkage long compat_sys_old_readdir(unsigned int fd,
949 struct compat_old_linux_dirent __user *dirent, unsigned int count)
953 struct compat_readdir_callback buf;
963 error = vfs_readdir(file, compat_fillonedir, &buf);
972 struct compat_linux_dirent {
973 compat_ulong_t d_ino;
974 compat_ulong_t d_off;
975 unsigned short d_reclen;
979 struct compat_getdents_callback {
980 struct compat_linux_dirent __user *current_dir;
981 struct compat_linux_dirent __user *previous;
986 static int compat_filldir(void *__buf, const char *name, int namlen,
987 loff_t offset, u64 ino, unsigned int d_type)
989 struct compat_linux_dirent __user * dirent;
990 struct compat_getdents_callback *buf = __buf;
991 compat_ulong_t d_ino;
992 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
994 buf->error = -EINVAL; /* only used if we fail.. */
995 if (reclen > buf->count)
998 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
1000 dirent = buf->previous;
1002 if (__put_user(offset, &dirent->d_off))
1005 dirent = buf->current_dir;
1006 if (__put_user(d_ino, &dirent->d_ino))
1008 if (__put_user(reclen, &dirent->d_reclen))
1010 if (copy_to_user(dirent->d_name, name, namlen))
1012 if (__put_user(0, dirent->d_name + namlen))
1014 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
1016 buf->previous = dirent;
1017 dirent = (void __user *)dirent + reclen;
1018 buf->current_dir = dirent;
1019 buf->count -= reclen;
1022 buf->error = -EFAULT;
1026 asmlinkage long compat_sys_getdents(unsigned int fd,
1027 struct compat_linux_dirent __user *dirent, unsigned int count)
1030 struct compat_linux_dirent __user * lastdirent;
1031 struct compat_getdents_callback buf;
1035 if (!access_ok(VERIFY_WRITE, dirent, count))
1043 buf.current_dir = dirent;
1044 buf.previous = NULL;
1048 error = vfs_readdir(file, compat_filldir, &buf);
1052 lastdirent = buf.previous;
1054 if (put_user(file->f_pos, &lastdirent->d_off))
1057 error = count - buf.count;
1066 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1067 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1069 struct compat_getdents_callback64 {
1070 struct linux_dirent64 __user *current_dir;
1071 struct linux_dirent64 __user *previous;
1076 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1077 u64 ino, unsigned int d_type)
1079 struct linux_dirent64 __user *dirent;
1080 struct compat_getdents_callback64 *buf = __buf;
1081 int jj = NAME_OFFSET(dirent);
1082 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1085 buf->error = -EINVAL; /* only used if we fail.. */
1086 if (reclen > buf->count)
1088 dirent = buf->previous;
1091 if (__put_user_unaligned(offset, &dirent->d_off))
1094 dirent = buf->current_dir;
1095 if (__put_user_unaligned(ino, &dirent->d_ino))
1098 if (__put_user_unaligned(off, &dirent->d_off))
1100 if (__put_user(reclen, &dirent->d_reclen))
1102 if (__put_user(d_type, &dirent->d_type))
1104 if (copy_to_user(dirent->d_name, name, namlen))
1106 if (__put_user(0, dirent->d_name + namlen))
1108 buf->previous = dirent;
1109 dirent = (void __user *)dirent + reclen;
1110 buf->current_dir = dirent;
1111 buf->count -= reclen;
1114 buf->error = -EFAULT;
1118 asmlinkage long compat_sys_getdents64(unsigned int fd,
1119 struct linux_dirent64 __user * dirent, unsigned int count)
1122 struct linux_dirent64 __user * lastdirent;
1123 struct compat_getdents_callback64 buf;
1127 if (!access_ok(VERIFY_WRITE, dirent, count))
1135 buf.current_dir = dirent;
1136 buf.previous = NULL;
1140 error = vfs_readdir(file, compat_filldir64, &buf);
1144 lastdirent = buf.previous;
1146 typeof(lastdirent->d_off) d_off = file->f_pos;
1147 __put_user_unaligned(d_off, &lastdirent->d_off);
1148 error = count - buf.count;
1156 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1158 static ssize_t compat_do_readv_writev(int type, struct file *file,
1159 const struct compat_iovec __user *uvector,
1160 unsigned long nr_segs, loff_t *pos)
1162 compat_ssize_t tot_len;
1163 struct iovec iovstack[UIO_FASTIOV];
1164 struct iovec *iov=iovstack, *vector;
1171 * SuS says "The readv() function *may* fail if the iovcnt argument
1172 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1173 * traditionally returned zero for zero segments, so...
1180 * First get the "struct iovec" from user memory and
1181 * verify all the pointers
1184 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1188 if (nr_segs > UIO_FASTIOV) {
1190 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1195 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1199 * Single unix specification:
1200 * We should -EINVAL if an element length is not >= 0 and fitting an
1201 * ssize_t. The total length is fitting an ssize_t
1203 * Be careful here because iov_len is a size_t not an ssize_t
1208 for (seg = 0 ; seg < nr_segs; seg++) {
1209 compat_ssize_t tmp = tot_len;
1213 if (__get_user(len, &uvector->iov_len) ||
1214 __get_user(buf, &uvector->iov_base)) {
1218 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1221 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1223 vector->iov_base = compat_ptr(buf);
1224 vector->iov_len = (compat_size_t) len;
1233 ret = rw_verify_area(type, file, pos, tot_len);
1237 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1243 fn = file->f_op->read;
1244 fnv = file->f_op->aio_read;
1246 fn = (io_fn_t)file->f_op->write;
1247 fnv = file->f_op->aio_write;
1251 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1254 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1257 if (iov != iovstack)
1259 if ((ret + (type == READ)) > 0) {
1260 struct dentry *dentry = file->f_dentry;
1262 fsnotify_access(dentry);
1264 fsnotify_modify(dentry);
1270 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1273 ssize_t ret = -EBADF;
1279 if (!(file->f_mode & FMODE_READ))
1283 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1286 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1294 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1297 ssize_t ret = -EBADF;
1302 if (!(file->f_mode & FMODE_WRITE))
1306 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1309 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1317 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1318 unsigned int nr_segs, unsigned int flags)
1321 struct iovec __user *iov;
1322 if (nr_segs > UIO_MAXIOV)
1324 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1325 for (i = 0; i < nr_segs; i++) {
1326 struct compat_iovec v;
1327 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1328 get_user(v.iov_len, &iov32[i].iov_len) ||
1329 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1330 put_user(v.iov_len, &iov[i].iov_len))
1333 return sys_vmsplice(fd, iov, nr_segs, flags);
1337 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1341 compat_sys_open(const char __user *filename, int flags, int mode)
1343 return do_sys_open(AT_FDCWD, filename, flags, mode);
1347 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1351 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1353 return do_sys_open(dfd, filename, flags, mode);
1357 * compat_count() counts the number of arguments/envelopes. It is basically
1358 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1359 * and envp pointers.
1361 static int compat_count(compat_uptr_t __user *argv, int max)
1369 if (get_user(p, argv))
1382 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1383 * except that it works with 32 bit argv and envp pointers.
1385 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1386 struct linux_binprm *bprm)
1388 struct page *kmapped_page = NULL;
1392 while (argc-- > 0) {
1397 if (get_user(str, argv+argc) ||
1398 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1403 if (bprm->p < len) {
1409 /* XXX: add architecture specific overflow check here. */
1414 int offset, bytes_to_copy;
1417 offset = pos % PAGE_SIZE;
1419 page = bprm->page[i];
1422 page = alloc_page(GFP_HIGHUSER);
1423 bprm->page[i] = page;
1431 if (page != kmapped_page) {
1433 kunmap(kmapped_page);
1434 kmapped_page = page;
1435 kaddr = kmap(kmapped_page);
1438 memset(kaddr, 0, offset);
1439 bytes_to_copy = PAGE_SIZE - offset;
1440 if (bytes_to_copy > len) {
1441 bytes_to_copy = len;
1443 memset(kaddr+offset+len, 0,
1444 PAGE_SIZE-offset-len);
1446 err = copy_from_user(kaddr+offset, compat_ptr(str),
1453 pos += bytes_to_copy;
1454 str += bytes_to_copy;
1455 len -= bytes_to_copy;
1461 kunmap(kmapped_page);
1467 #define free_arg_pages(bprm) do { } while (0)
1471 static inline void free_arg_pages(struct linux_binprm *bprm)
1475 for (i = 0; i < MAX_ARG_PAGES; i++) {
1477 __free_page(bprm->page[i]);
1478 bprm->page[i] = NULL;
1482 #endif /* CONFIG_MMU */
1485 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1486 * that it processes 32 bit argv and envp pointers.
1488 int compat_do_execve(char * filename,
1489 compat_uptr_t __user *argv,
1490 compat_uptr_t __user *envp,
1491 struct pt_regs * regs)
1493 struct linux_binprm *bprm;
1499 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1503 file = open_exec(filename);
1504 retval = PTR_ERR(file);
1510 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1512 bprm->filename = filename;
1513 bprm->interp = filename;
1514 bprm->mm = mm_alloc();
1519 retval = init_new_context(current, bprm->mm);
1523 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1524 if ((retval = bprm->argc) < 0)
1527 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1528 if ((retval = bprm->envc) < 0)
1531 retval = security_bprm_alloc(bprm);
1535 retval = prepare_binprm(bprm);
1539 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1543 bprm->exec = bprm->p;
1544 retval = compat_copy_strings(bprm->envc, envp, bprm);
1548 retval = compat_copy_strings(bprm->argc, argv, bprm);
1552 retval = search_binary_handler(bprm, regs);
1554 free_arg_pages(bprm);
1556 /* execve success */
1557 security_bprm_free(bprm);
1558 acct_update_integrals(current);
1564 /* Something went wrong, return the inode and free the argument pages*/
1565 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1566 struct page * page = bprm->page[i];
1572 security_bprm_free(bprm);
1580 allow_write_access(bprm->file);
1591 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1593 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1596 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1597 * 64-bit unsigned longs.
1600 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1601 unsigned long *fdset)
1603 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1607 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1614 __get_user(l, ufdset);
1615 __get_user(h, ufdset+1);
1617 *fdset++ = h << 32 | l;
1621 __get_user(*fdset, ufdset);
1623 /* Tricky, must clear full unsigned long in the
1624 * kernel fdset at the end, this makes sure that
1627 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1633 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1634 unsigned long *fdset)
1637 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1648 __put_user(l, ufdset);
1649 __put_user(h, ufdset+1);
1654 __put_user(*fdset, ufdset);
1659 * This is a virtual copy of sys_select from fs/select.c and probably
1660 * should be compared to it from time to time
1664 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1665 * like to be certain this leads to no problems. So I return
1666 * EINTR just for safety.
1668 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1669 * I'm trying ERESTARTNOHAND which restart only when you want to.
1671 #define MAX_SELECT_SECONDS \
1672 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1674 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1675 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1679 int size, max_fdset, ret = -EINVAL;
1680 struct fdtable *fdt;
1685 /* max_fdset can increase, so grab it once to avoid race */
1687 fdt = files_fdtable(current->files);
1688 max_fdset = fdt->max_fdset;
1694 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1695 * since we used fdset we need to allocate memory in units of
1699 size = FDS_BYTES(n);
1700 bits = kmalloc(6 * size, GFP_KERNEL);
1703 fds.in = (unsigned long *) bits;
1704 fds.out = (unsigned long *) (bits + size);
1705 fds.ex = (unsigned long *) (bits + 2*size);
1706 fds.res_in = (unsigned long *) (bits + 3*size);
1707 fds.res_out = (unsigned long *) (bits + 4*size);
1708 fds.res_ex = (unsigned long *) (bits + 5*size);
1710 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1711 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1712 (ret = compat_get_fd_set(n, exp, fds.ex)))
1714 zero_fd_set(n, fds.res_in);
1715 zero_fd_set(n, fds.res_out);
1716 zero_fd_set(n, fds.res_ex);
1718 ret = do_select(n, &fds, timeout);
1723 ret = -ERESTARTNOHAND;
1724 if (signal_pending(current))
1729 compat_set_fd_set(n, inp, fds.res_in);
1730 compat_set_fd_set(n, outp, fds.res_out);
1731 compat_set_fd_set(n, exp, fds.res_ex);
1739 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1740 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1741 struct compat_timeval __user *tvp)
1744 struct compat_timeval tv;
1748 if (copy_from_user(&tv, tvp, sizeof(tv)))
1751 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1754 /* Cast to u64 to make GCC stop complaining */
1755 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1756 timeout = -1; /* infinite */
1758 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1759 timeout += tv.tv_sec * HZ;
1763 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1766 struct compat_timeval rtv;
1768 if (current->personality & STICKY_TIMEOUTS)
1770 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1771 rtv.tv_sec = timeout;
1772 if (compat_timeval_compare(&rtv, &tv) >= 0)
1774 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1777 * If an application puts its timeval in read-only
1778 * memory, we don't want the Linux-specific update to
1779 * the timeval to cause a fault after the select has
1780 * completed successfully. However, because we're not
1781 * updating the timeval, we can't restart the system
1784 if (ret == -ERESTARTNOHAND)
1792 #ifdef TIF_RESTORE_SIGMASK
1793 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1794 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1795 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1796 compat_size_t sigsetsize)
1798 compat_sigset_t ss32;
1799 sigset_t ksigmask, sigsaved;
1800 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1801 struct compat_timespec ts;
1805 if (copy_from_user(&ts, tsp, sizeof(ts)))
1808 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1813 if (sigsetsize != sizeof(compat_sigset_t))
1815 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1817 sigset_from_compat(&ksigmask, &ss32);
1819 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1820 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1825 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1826 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1827 timeout += ts.tv_sec * (unsigned long)HZ;
1831 ts.tv_sec -= MAX_SELECT_SECONDS;
1832 timeout = MAX_SELECT_SECONDS * HZ;
1836 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1838 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1841 struct compat_timespec rts;
1843 if (current->personality & STICKY_TIMEOUTS)
1846 rts.tv_sec = timeout / HZ;
1847 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1848 if (rts.tv_nsec >= NSEC_PER_SEC) {
1850 rts.tv_nsec -= NSEC_PER_SEC;
1852 if (compat_timespec_compare(&rts, &ts) >= 0)
1854 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1857 * If an application puts its timeval in read-only
1858 * memory, we don't want the Linux-specific update to
1859 * the timeval to cause a fault after the select has
1860 * completed successfully. However, because we're not
1861 * updating the timeval, we can't restart the system
1864 if (ret == -ERESTARTNOHAND)
1869 if (ret == -ERESTARTNOHAND) {
1871 * Don't restore the signal mask yet. Let do_signal() deliver
1872 * the signal on the way back to userspace, before the signal
1876 memcpy(¤t->saved_sigmask, &sigsaved,
1878 set_thread_flag(TIF_RESTORE_SIGMASK);
1881 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1886 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1887 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1888 struct compat_timespec __user *tsp, void __user *sig)
1890 compat_size_t sigsetsize = 0;
1891 compat_uptr_t up = 0;
1894 if (!access_ok(VERIFY_READ, sig,
1895 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1896 __get_user(up, (compat_uptr_t __user *)sig) ||
1897 __get_user(sigsetsize,
1898 (compat_size_t __user *)(sig+sizeof(up))))
1901 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1905 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1906 unsigned int nfds, struct compat_timespec __user *tsp,
1907 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1909 compat_sigset_t ss32;
1910 sigset_t ksigmask, sigsaved;
1911 struct compat_timespec ts;
1916 if (copy_from_user(&ts, tsp, sizeof(ts)))
1919 /* We assume that ts.tv_sec is always lower than
1920 the number of seconds that can be expressed in
1921 an s64. Otherwise the compiler bitches at us */
1922 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1923 timeout += ts.tv_sec * HZ;
1927 if (sigsetsize != sizeof(compat_sigset_t))
1929 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1931 sigset_from_compat(&ksigmask, &ss32);
1933 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1934 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1937 ret = do_sys_poll(ufds, nfds, &timeout);
1939 /* We can restart this syscall, usually */
1940 if (ret == -EINTR) {
1942 * Don't restore the signal mask yet. Let do_signal() deliver
1943 * the signal on the way back to userspace, before the signal
1947 memcpy(¤t->saved_sigmask, &sigsaved,
1949 set_thread_flag(TIF_RESTORE_SIGMASK);
1951 ret = -ERESTARTNOHAND;
1953 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1955 if (tsp && timeout >= 0) {
1956 struct compat_timespec rts;
1958 if (current->personality & STICKY_TIMEOUTS)
1960 /* Yes, we know it's actually an s64, but it's also positive. */
1961 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1963 rts.tv_sec = timeout;
1964 if (compat_timespec_compare(&rts, &ts) >= 0)
1966 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1969 * If an application puts its timeval in read-only
1970 * memory, we don't want the Linux-specific update to
1971 * the timeval to cause a fault after the select has
1972 * completed successfully. However, because we're not
1973 * updating the timeval, we can't restart the system
1976 if (ret == -ERESTARTNOHAND && timeout >= 0)
1983 #endif /* TIF_RESTORE_SIGMASK */
1985 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1986 /* Stuff for NFS server syscalls... */
1987 struct compat_nfsctl_svc {
1992 struct compat_nfsctl_client {
1993 s8 cl32_ident[NFSCLNT_IDMAX+1];
1995 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1998 u8 cl32_fhkey[NFSCLNT_KEYMAX];
2001 struct compat_nfsctl_export {
2002 char ex32_client[NFSCLNT_IDMAX+1];
2003 char ex32_path[NFS_MAXPATHLEN+1];
2004 compat_dev_t ex32_dev;
2005 compat_ino_t ex32_ino;
2006 compat_int_t ex32_flags;
2007 __compat_uid_t ex32_anon_uid;
2008 __compat_gid_t ex32_anon_gid;
2011 struct compat_nfsctl_fdparm {
2012 struct sockaddr gd32_addr;
2013 s8 gd32_path[NFS_MAXPATHLEN+1];
2014 compat_int_t gd32_version;
2017 struct compat_nfsctl_fsparm {
2018 struct sockaddr gd32_addr;
2019 s8 gd32_path[NFS_MAXPATHLEN+1];
2020 compat_int_t gd32_maxlen;
2023 struct compat_nfsctl_arg {
2024 compat_int_t ca32_version; /* safeguard */
2026 struct compat_nfsctl_svc u32_svc;
2027 struct compat_nfsctl_client u32_client;
2028 struct compat_nfsctl_export u32_export;
2029 struct compat_nfsctl_fdparm u32_getfd;
2030 struct compat_nfsctl_fsparm u32_getfs;
2032 #define ca32_svc u.u32_svc
2033 #define ca32_client u.u32_client
2034 #define ca32_export u.u32_export
2035 #define ca32_getfd u.u32_getfd
2036 #define ca32_getfs u.u32_getfs
2039 union compat_nfsctl_res {
2040 __u8 cr32_getfh[NFS_FHSIZE];
2041 struct knfsd_fh cr32_getfs;
2044 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2045 struct compat_nfsctl_arg __user *arg)
2047 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2048 get_user(karg->ca_version, &arg->ca32_version) ||
2049 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2050 __get_user(karg->ca_svc.svc_nthreads,
2051 &arg->ca32_svc.svc32_nthreads))
2056 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2057 struct compat_nfsctl_arg __user *arg)
2059 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2060 sizeof(arg->ca32_client)) ||
2061 get_user(karg->ca_version, &arg->ca32_version) ||
2062 __copy_from_user(&karg->ca_client.cl_ident[0],
2063 &arg->ca32_client.cl32_ident[0],
2065 __get_user(karg->ca_client.cl_naddr,
2066 &arg->ca32_client.cl32_naddr) ||
2067 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2068 &arg->ca32_client.cl32_addrlist[0],
2069 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2070 __get_user(karg->ca_client.cl_fhkeytype,
2071 &arg->ca32_client.cl32_fhkeytype) ||
2072 __get_user(karg->ca_client.cl_fhkeylen,
2073 &arg->ca32_client.cl32_fhkeylen) ||
2074 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2075 &arg->ca32_client.cl32_fhkey[0],
2082 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2083 struct compat_nfsctl_arg __user *arg)
2085 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2086 sizeof(arg->ca32_export)) ||
2087 get_user(karg->ca_version, &arg->ca32_version) ||
2088 __copy_from_user(&karg->ca_export.ex_client[0],
2089 &arg->ca32_export.ex32_client[0],
2091 __copy_from_user(&karg->ca_export.ex_path[0],
2092 &arg->ca32_export.ex32_path[0],
2094 __get_user(karg->ca_export.ex_dev,
2095 &arg->ca32_export.ex32_dev) ||
2096 __get_user(karg->ca_export.ex_ino,
2097 &arg->ca32_export.ex32_ino) ||
2098 __get_user(karg->ca_export.ex_flags,
2099 &arg->ca32_export.ex32_flags) ||
2100 __get_user(karg->ca_export.ex_anon_uid,
2101 &arg->ca32_export.ex32_anon_uid) ||
2102 __get_user(karg->ca_export.ex_anon_gid,
2103 &arg->ca32_export.ex32_anon_gid))
2105 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2106 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2111 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2112 struct compat_nfsctl_arg __user *arg)
2114 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2115 sizeof(arg->ca32_getfd)) ||
2116 get_user(karg->ca_version, &arg->ca32_version) ||
2117 __copy_from_user(&karg->ca_getfd.gd_addr,
2118 &arg->ca32_getfd.gd32_addr,
2119 (sizeof(struct sockaddr))) ||
2120 __copy_from_user(&karg->ca_getfd.gd_path,
2121 &arg->ca32_getfd.gd32_path,
2122 (NFS_MAXPATHLEN+1)) ||
2123 __get_user(karg->ca_getfd.gd_version,
2124 &arg->ca32_getfd.gd32_version))
2130 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2131 struct compat_nfsctl_arg __user *arg)
2133 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2134 get_user(karg->ca_version, &arg->ca32_version) ||
2135 __copy_from_user(&karg->ca_getfs.gd_addr,
2136 &arg->ca32_getfs.gd32_addr,
2137 (sizeof(struct sockaddr))) ||
2138 __copy_from_user(&karg->ca_getfs.gd_path,
2139 &arg->ca32_getfs.gd32_path,
2140 (NFS_MAXPATHLEN+1)) ||
2141 __get_user(karg->ca_getfs.gd_maxlen,
2142 &arg->ca32_getfs.gd32_maxlen))
2148 /* This really doesn't need translations, we are only passing
2149 * back a union which contains opaque nfs file handle data.
2151 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2152 union compat_nfsctl_res __user *res)
2156 err = copy_to_user(res, kres, sizeof(*res));
2158 return (err) ? -EFAULT : 0;
2161 asmlinkage long compat_sys_nfsservctl(int cmd,
2162 struct compat_nfsctl_arg __user *arg,
2163 union compat_nfsctl_res __user *res)
2165 struct nfsctl_arg *karg;
2166 union nfsctl_res *kres;
2170 karg = kmalloc(sizeof(*karg), GFP_USER);
2171 kres = kmalloc(sizeof(*kres), GFP_USER);
2172 if(!karg || !kres) {
2179 err = compat_nfs_svc_trans(karg, arg);
2182 case NFSCTL_ADDCLIENT:
2183 err = compat_nfs_clnt_trans(karg, arg);
2186 case NFSCTL_DELCLIENT:
2187 err = compat_nfs_clnt_trans(karg, arg);
2191 case NFSCTL_UNEXPORT:
2192 err = compat_nfs_exp_trans(karg, arg);
2196 err = compat_nfs_getfd_trans(karg, arg);
2200 err = compat_nfs_getfs_trans(karg, arg);
2213 /* The __user pointer casts are valid because of the set_fs() */
2214 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2220 if((cmd == NFSCTL_GETFD) ||
2221 (cmd == NFSCTL_GETFS))
2222 err = compat_nfs_getfh_res_trans(kres, res);
2230 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2232 return sys_ni_syscall();