4 * Kernel compatibililty routines for e.g. 32 bit syscall support
7 * Copyright (C) 2002 Stephen Rothwell, IBM Corporation
8 * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
9 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
10 * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
11 * Copyright (C) 2003 Pavel Machek (pavel@suse.cz)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/kernel.h>
19 #include <linux/linkage.h>
20 #include <linux/compat.h>
21 #include <linux/errno.h>
22 #include <linux/time.h>
24 #include <linux/fcntl.h>
25 #include <linux/namei.h>
26 #include <linux/file.h>
27 #include <linux/fdtable.h>
28 #include <linux/vfs.h>
29 #include <linux/ioctl.h>
30 #include <linux/init.h>
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/security.h>
49 #include <linux/highmem.h>
50 #include <linux/signal.h>
51 #include <linux/poll.h>
53 #include <linux/eventpoll.h>
54 #include <linux/fs_struct.h>
56 #include <asm/uaccess.h>
57 #include <asm/mmu_context.h>
58 #include <asm/ioctls.h>
63 int compat_printk(const char *fmt, ...)
70 ret = vprintk(fmt, ap);
75 #include "read_write.h"
78 * Not all architectures have sys_utime, so implement this in terms
81 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
83 struct timespec tv[2];
86 if (get_user(tv[0].tv_sec, &t->actime) ||
87 get_user(tv[1].tv_sec, &t->modtime))
92 return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
95 asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename, struct compat_timespec __user *t, int flags)
97 struct timespec tv[2];
100 if (get_compat_timespec(&tv[0], &t[0]) ||
101 get_compat_timespec(&tv[1], &t[1]))
104 if ((tv[0].tv_nsec == UTIME_OMIT || tv[0].tv_nsec == UTIME_NOW)
105 && tv[0].tv_sec != 0)
107 if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW)
108 && tv[1].tv_sec != 0)
111 if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
114 return do_utimes(dfd, filename, t ? tv : NULL, flags);
117 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
119 struct timespec tv[2];
122 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
123 get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
124 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
125 get_user(tv[1].tv_nsec, &t[1].tv_usec))
127 if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
128 tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
130 tv[0].tv_nsec *= 1000;
131 tv[1].tv_nsec *= 1000;
133 return do_utimes(dfd, filename, t ? tv : NULL, 0);
136 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
138 return compat_sys_futimesat(AT_FDCWD, filename, t);
141 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
143 compat_ino_t ino = stat->ino;
144 typeof(ubuf->st_uid) uid = 0;
145 typeof(ubuf->st_gid) gid = 0;
148 SET_UID(uid, stat->uid);
149 SET_GID(gid, stat->gid);
151 if ((u64) stat->size > MAX_NON_LFS ||
152 !old_valid_dev(stat->dev) ||
153 !old_valid_dev(stat->rdev))
155 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
158 if (clear_user(ubuf, sizeof(*ubuf)))
161 err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
162 err |= __put_user(ino, &ubuf->st_ino);
163 err |= __put_user(stat->mode, &ubuf->st_mode);
164 err |= __put_user(stat->nlink, &ubuf->st_nlink);
165 err |= __put_user(uid, &ubuf->st_uid);
166 err |= __put_user(gid, &ubuf->st_gid);
167 err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
168 err |= __put_user(stat->size, &ubuf->st_size);
169 err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
170 err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
171 err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
172 err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
173 err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
174 err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
175 err |= __put_user(stat->blksize, &ubuf->st_blksize);
176 err |= __put_user(stat->blocks, &ubuf->st_blocks);
180 asmlinkage long compat_sys_newstat(char __user * filename,
181 struct compat_stat __user *statbuf)
184 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
187 error = cp_compat_stat(&stat, statbuf);
191 asmlinkage long compat_sys_newlstat(char __user * filename,
192 struct compat_stat __user *statbuf)
195 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
198 error = cp_compat_stat(&stat, statbuf);
202 #ifndef __ARCH_WANT_STAT64
203 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
204 struct compat_stat __user *statbuf, int flag)
209 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
212 if (flag & AT_SYMLINK_NOFOLLOW)
213 error = vfs_lstat_fd(dfd, filename, &stat);
215 error = vfs_stat_fd(dfd, filename, &stat);
218 error = cp_compat_stat(&stat, statbuf);
225 asmlinkage long compat_sys_newfstat(unsigned int fd,
226 struct compat_stat __user * statbuf)
229 int error = vfs_fstat(fd, &stat);
232 error = cp_compat_stat(&stat, statbuf);
236 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
239 if (sizeof ubuf->f_blocks == 4) {
240 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
241 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
243 /* f_files and f_ffree may be -1; it's okay
244 * to stuff that into 32 bits */
245 if (kbuf->f_files != 0xffffffffffffffffULL
246 && (kbuf->f_files & 0xffffffff00000000ULL))
248 if (kbuf->f_ffree != 0xffffffffffffffffULL
249 && (kbuf->f_ffree & 0xffffffff00000000ULL))
252 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
253 __put_user(kbuf->f_type, &ubuf->f_type) ||
254 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
255 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
256 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
257 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
258 __put_user(kbuf->f_files, &ubuf->f_files) ||
259 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
260 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
261 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
262 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
263 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
264 __put_user(0, &ubuf->f_spare[0]) ||
265 __put_user(0, &ubuf->f_spare[1]) ||
266 __put_user(0, &ubuf->f_spare[2]) ||
267 __put_user(0, &ubuf->f_spare[3]) ||
268 __put_user(0, &ubuf->f_spare[4]))
274 * The following statfs calls are copies of code from fs/open.c and
275 * should be checked against those from time to time
277 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
282 error = user_path(pathname, &path);
285 error = vfs_statfs(path.dentry, &tmp);
287 error = put_compat_statfs(buf, &tmp);
293 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
303 error = vfs_statfs(file->f_path.dentry, &tmp);
305 error = put_compat_statfs(buf, &tmp);
311 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
313 if (sizeof ubuf->f_blocks == 4) {
314 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
315 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
317 /* f_files and f_ffree may be -1; it's okay
318 * to stuff that into 32 bits */
319 if (kbuf->f_files != 0xffffffffffffffffULL
320 && (kbuf->f_files & 0xffffffff00000000ULL))
322 if (kbuf->f_ffree != 0xffffffffffffffffULL
323 && (kbuf->f_ffree & 0xffffffff00000000ULL))
326 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
327 __put_user(kbuf->f_type, &ubuf->f_type) ||
328 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
329 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
330 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
331 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
332 __put_user(kbuf->f_files, &ubuf->f_files) ||
333 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
334 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
335 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
336 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
337 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
342 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
347 if (sz != sizeof(*buf))
350 error = user_path(pathname, &path);
353 error = vfs_statfs(path.dentry, &tmp);
355 error = put_compat_statfs64(buf, &tmp);
361 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
367 if (sz != sizeof(*buf))
374 error = vfs_statfs(file->f_path.dentry, &tmp);
376 error = put_compat_statfs64(buf, &tmp);
383 * This is a copy of sys_ustat, just dealing with a structure layout.
384 * Given how simple this syscall is that apporach is more maintainable
385 * than the various conversion hacks.
387 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
389 struct super_block *sb;
390 struct compat_ustat tmp;
394 sb = user_get_super(new_decode_dev(dev));
397 err = vfs_statfs(sb->s_root, &sbuf);
402 memset(&tmp, 0, sizeof(struct compat_ustat));
403 tmp.f_tfree = sbuf.f_bfree;
404 tmp.f_tinode = sbuf.f_ffree;
405 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
410 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
412 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
413 __get_user(kfl->l_type, &ufl->l_type) ||
414 __get_user(kfl->l_whence, &ufl->l_whence) ||
415 __get_user(kfl->l_start, &ufl->l_start) ||
416 __get_user(kfl->l_len, &ufl->l_len) ||
417 __get_user(kfl->l_pid, &ufl->l_pid))
422 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
424 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
425 __put_user(kfl->l_type, &ufl->l_type) ||
426 __put_user(kfl->l_whence, &ufl->l_whence) ||
427 __put_user(kfl->l_start, &ufl->l_start) ||
428 __put_user(kfl->l_len, &ufl->l_len) ||
429 __put_user(kfl->l_pid, &ufl->l_pid))
434 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
435 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
437 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
438 __get_user(kfl->l_type, &ufl->l_type) ||
439 __get_user(kfl->l_whence, &ufl->l_whence) ||
440 __get_user(kfl->l_start, &ufl->l_start) ||
441 __get_user(kfl->l_len, &ufl->l_len) ||
442 __get_user(kfl->l_pid, &ufl->l_pid))
448 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
449 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
451 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
452 __put_user(kfl->l_type, &ufl->l_type) ||
453 __put_user(kfl->l_whence, &ufl->l_whence) ||
454 __put_user(kfl->l_start, &ufl->l_start) ||
455 __put_user(kfl->l_len, &ufl->l_len) ||
456 __put_user(kfl->l_pid, &ufl->l_pid))
462 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
473 ret = get_compat_flock(&f, compat_ptr(arg));
478 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
480 if (cmd == F_GETLK && ret == 0) {
481 /* GETLK was successfule and we need to return the data...
482 * but it needs to fit in the compat structure.
483 * l_start shouldn't be too big, unless the original
484 * start + end is greater than COMPAT_OFF_T_MAX, in which
485 * case the app was asking for trouble, so we return
486 * -EOVERFLOW in that case.
487 * l_len could be too big, in which case we just truncate it,
488 * and only allow the app to see that part of the conflicting
489 * lock that might make sense to it anyway
492 if (f.l_start > COMPAT_OFF_T_MAX)
494 if (f.l_len > COMPAT_OFF_T_MAX)
495 f.l_len = COMPAT_OFF_T_MAX;
497 ret = put_compat_flock(&f, compat_ptr(arg));
504 ret = get_compat_flock64(&f, compat_ptr(arg));
509 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
510 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
513 if (cmd == F_GETLK64 && ret == 0) {
514 /* need to return lock information - see above for commentary */
515 if (f.l_start > COMPAT_LOFF_T_MAX)
517 if (f.l_len > COMPAT_LOFF_T_MAX)
518 f.l_len = COMPAT_LOFF_T_MAX;
520 ret = put_compat_flock64(&f, compat_ptr(arg));
525 ret = sys_fcntl(fd, cmd, arg);
531 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
534 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
536 return compat_sys_fcntl64(fd, cmd, arg);
540 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
545 mm_segment_t oldfs = get_fs();
546 if (unlikely(get_user(ctx64, ctx32p)))
550 /* The __user pointer cast is valid because of the set_fs() */
551 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
553 /* truncating is ok because it's a user address */
555 ret = put_user((u32) ctx64, ctx32p);
560 compat_sys_io_getevents(aio_context_t ctx_id,
561 unsigned long min_nr,
563 struct io_event __user *events,
564 struct compat_timespec __user *timeout)
568 struct timespec __user *ut = NULL;
571 if (unlikely(!access_ok(VERIFY_WRITE, events,
572 nr * sizeof(struct io_event))))
575 if (get_compat_timespec(&t, timeout))
578 ut = compat_alloc_user_space(sizeof(*ut));
579 if (copy_to_user(ut, &t, sizeof(t)) )
582 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
588 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
593 for (i = 0; i < nr; ++i) {
594 if (get_user(uptr, ptr32 + i))
596 if (put_user(compat_ptr(uptr), ptr64 + i))
602 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
605 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
607 struct iocb __user * __user *iocb64;
610 if (unlikely(nr < 0))
613 if (nr > MAX_AIO_SUBMITS)
614 nr = MAX_AIO_SUBMITS;
616 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
617 ret = copy_iocb(nr, iocb, iocb64);
619 ret = sys_io_submit(ctx_id, nr, iocb64);
623 struct compat_ncp_mount_data {
624 compat_int_t version;
625 compat_uint_t ncp_fd;
626 __compat_uid_t mounted_uid;
627 compat_pid_t wdog_pid;
628 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
629 compat_uint_t time_out;
630 compat_uint_t retry_count;
634 compat_mode_t file_mode;
635 compat_mode_t dir_mode;
638 struct compat_ncp_mount_data_v4 {
639 compat_int_t version;
640 compat_ulong_t flags;
641 compat_ulong_t mounted_uid;
642 compat_long_t wdog_pid;
643 compat_uint_t ncp_fd;
644 compat_uint_t time_out;
645 compat_uint_t retry_count;
648 compat_ulong_t file_mode;
649 compat_ulong_t dir_mode;
652 static void *do_ncp_super_data_conv(void *raw_data)
654 int version = *(unsigned int *)raw_data;
657 struct compat_ncp_mount_data *c_n = raw_data;
658 struct ncp_mount_data *n = raw_data;
660 n->dir_mode = c_n->dir_mode;
661 n->file_mode = c_n->file_mode;
664 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
665 n->wdog_pid = c_n->wdog_pid;
666 n->mounted_uid = c_n->mounted_uid;
667 } else if (version == 4) {
668 struct compat_ncp_mount_data_v4 *c_n = raw_data;
669 struct ncp_mount_data_v4 *n = raw_data;
671 n->dir_mode = c_n->dir_mode;
672 n->file_mode = c_n->file_mode;
675 n->retry_count = c_n->retry_count;
676 n->time_out = c_n->time_out;
677 n->ncp_fd = c_n->ncp_fd;
678 n->wdog_pid = c_n->wdog_pid;
679 n->mounted_uid = c_n->mounted_uid;
680 n->flags = c_n->flags;
681 } else if (version != 5) {
688 struct compat_smb_mount_data {
689 compat_int_t version;
690 __compat_uid_t mounted_uid;
693 compat_mode_t file_mode;
694 compat_mode_t dir_mode;
697 static void *do_smb_super_data_conv(void *raw_data)
699 struct smb_mount_data *s = raw_data;
700 struct compat_smb_mount_data *c_s = raw_data;
702 if (c_s->version != SMB_MOUNT_OLDVERSION)
704 s->dir_mode = c_s->dir_mode;
705 s->file_mode = c_s->file_mode;
708 s->mounted_uid = c_s->mounted_uid;
713 struct compat_nfs_string {
718 static inline void compat_nfs_string(struct nfs_string *dst,
719 struct compat_nfs_string *src)
721 dst->data = compat_ptr(src->data);
725 struct compat_nfs4_mount_data_v1 {
726 compat_int_t version;
731 compat_int_t retrans;
732 compat_int_t acregmin;
733 compat_int_t acregmax;
734 compat_int_t acdirmin;
735 compat_int_t acdirmax;
736 struct compat_nfs_string client_addr;
737 struct compat_nfs_string mnt_path;
738 struct compat_nfs_string hostname;
739 compat_uint_t host_addrlen;
740 compat_uptr_t host_addr;
742 compat_int_t auth_flavourlen;
743 compat_uptr_t auth_flavours;
746 static int do_nfs4_super_data_conv(void *raw_data)
748 int version = *(compat_uint_t *) raw_data;
751 struct compat_nfs4_mount_data_v1 *raw = raw_data;
752 struct nfs4_mount_data *real = raw_data;
754 /* copy the fields backwards */
755 real->auth_flavours = compat_ptr(raw->auth_flavours);
756 real->auth_flavourlen = raw->auth_flavourlen;
757 real->proto = raw->proto;
758 real->host_addr = compat_ptr(raw->host_addr);
759 real->host_addrlen = raw->host_addrlen;
760 compat_nfs_string(&real->hostname, &raw->hostname);
761 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
762 compat_nfs_string(&real->client_addr, &raw->client_addr);
763 real->acdirmax = raw->acdirmax;
764 real->acdirmin = raw->acdirmin;
765 real->acregmax = raw->acregmax;
766 real->acregmin = raw->acregmin;
767 real->retrans = raw->retrans;
768 real->timeo = raw->timeo;
769 real->wsize = raw->wsize;
770 real->rsize = raw->rsize;
771 real->flags = raw->flags;
772 real->version = raw->version;
778 #define SMBFS_NAME "smbfs"
779 #define NCPFS_NAME "ncpfs"
780 #define NFS4_NAME "nfs4"
782 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
783 char __user * type, unsigned long flags,
786 unsigned long type_page;
787 unsigned long data_page;
788 unsigned long dev_page;
792 retval = copy_mount_options (type, &type_page);
796 dir_page = getname(dir_name);
797 retval = PTR_ERR(dir_page);
798 if (IS_ERR(dir_page))
801 retval = copy_mount_options (dev_name, &dev_page);
805 retval = copy_mount_options (data, &data_page);
811 if (type_page && data_page) {
812 if (!strcmp((char *)type_page, SMBFS_NAME)) {
813 do_smb_super_data_conv((void *)data_page);
814 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
815 do_ncp_super_data_conv((void *)data_page);
816 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
817 if (do_nfs4_super_data_conv((void *) data_page))
823 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
824 flags, (void*)data_page);
828 free_page(data_page);
834 free_page(type_page);
839 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
841 struct compat_old_linux_dirent {
842 compat_ulong_t d_ino;
843 compat_ulong_t d_offset;
844 unsigned short d_namlen;
848 struct compat_readdir_callback {
849 struct compat_old_linux_dirent __user *dirent;
853 static int compat_fillonedir(void *__buf, const char *name, int namlen,
854 loff_t offset, u64 ino, unsigned int d_type)
856 struct compat_readdir_callback *buf = __buf;
857 struct compat_old_linux_dirent __user *dirent;
858 compat_ulong_t d_ino;
863 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
864 buf->result = -EOVERFLOW;
868 dirent = buf->dirent;
869 if (!access_ok(VERIFY_WRITE, dirent,
870 (unsigned long)(dirent->d_name + namlen + 1) -
871 (unsigned long)dirent))
873 if ( __put_user(d_ino, &dirent->d_ino) ||
874 __put_user(offset, &dirent->d_offset) ||
875 __put_user(namlen, &dirent->d_namlen) ||
876 __copy_to_user(dirent->d_name, name, namlen) ||
877 __put_user(0, dirent->d_name + namlen))
881 buf->result = -EFAULT;
885 asmlinkage long compat_sys_old_readdir(unsigned int fd,
886 struct compat_old_linux_dirent __user *dirent, unsigned int count)
890 struct compat_readdir_callback buf;
900 error = vfs_readdir(file, compat_fillonedir, &buf);
909 struct compat_linux_dirent {
910 compat_ulong_t d_ino;
911 compat_ulong_t d_off;
912 unsigned short d_reclen;
916 struct compat_getdents_callback {
917 struct compat_linux_dirent __user *current_dir;
918 struct compat_linux_dirent __user *previous;
923 static int compat_filldir(void *__buf, const char *name, int namlen,
924 loff_t offset, u64 ino, unsigned int d_type)
926 struct compat_linux_dirent __user * dirent;
927 struct compat_getdents_callback *buf = __buf;
928 compat_ulong_t d_ino;
929 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
931 buf->error = -EINVAL; /* only used if we fail.. */
932 if (reclen > buf->count)
935 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
936 buf->error = -EOVERFLOW;
939 dirent = buf->previous;
941 if (__put_user(offset, &dirent->d_off))
944 dirent = buf->current_dir;
945 if (__put_user(d_ino, &dirent->d_ino))
947 if (__put_user(reclen, &dirent->d_reclen))
949 if (copy_to_user(dirent->d_name, name, namlen))
951 if (__put_user(0, dirent->d_name + namlen))
953 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
955 buf->previous = dirent;
956 dirent = (void __user *)dirent + reclen;
957 buf->current_dir = dirent;
958 buf->count -= reclen;
961 buf->error = -EFAULT;
965 asmlinkage long compat_sys_getdents(unsigned int fd,
966 struct compat_linux_dirent __user *dirent, unsigned int count)
969 struct compat_linux_dirent __user * lastdirent;
970 struct compat_getdents_callback buf;
974 if (!access_ok(VERIFY_WRITE, dirent, count))
982 buf.current_dir = dirent;
987 error = vfs_readdir(file, compat_filldir, &buf);
990 lastdirent = buf.previous;
992 if (put_user(file->f_pos, &lastdirent->d_off))
995 error = count - buf.count;
1002 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1004 struct compat_getdents_callback64 {
1005 struct linux_dirent64 __user *current_dir;
1006 struct linux_dirent64 __user *previous;
1011 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1012 u64 ino, unsigned int d_type)
1014 struct linux_dirent64 __user *dirent;
1015 struct compat_getdents_callback64 *buf = __buf;
1016 int jj = NAME_OFFSET(dirent);
1017 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1020 buf->error = -EINVAL; /* only used if we fail.. */
1021 if (reclen > buf->count)
1023 dirent = buf->previous;
1026 if (__put_user_unaligned(offset, &dirent->d_off))
1029 dirent = buf->current_dir;
1030 if (__put_user_unaligned(ino, &dirent->d_ino))
1033 if (__put_user_unaligned(off, &dirent->d_off))
1035 if (__put_user(reclen, &dirent->d_reclen))
1037 if (__put_user(d_type, &dirent->d_type))
1039 if (copy_to_user(dirent->d_name, name, namlen))
1041 if (__put_user(0, dirent->d_name + namlen))
1043 buf->previous = dirent;
1044 dirent = (void __user *)dirent + reclen;
1045 buf->current_dir = dirent;
1046 buf->count -= reclen;
1049 buf->error = -EFAULT;
1053 asmlinkage long compat_sys_getdents64(unsigned int fd,
1054 struct linux_dirent64 __user * dirent, unsigned int count)
1057 struct linux_dirent64 __user * lastdirent;
1058 struct compat_getdents_callback64 buf;
1062 if (!access_ok(VERIFY_WRITE, dirent, count))
1070 buf.current_dir = dirent;
1071 buf.previous = NULL;
1075 error = vfs_readdir(file, compat_filldir64, &buf);
1078 lastdirent = buf.previous;
1080 typeof(lastdirent->d_off) d_off = file->f_pos;
1081 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1084 error = count - buf.count;
1090 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1092 static ssize_t compat_do_readv_writev(int type, struct file *file,
1093 const struct compat_iovec __user *uvector,
1094 unsigned long nr_segs, loff_t *pos)
1096 compat_ssize_t tot_len;
1097 struct iovec iovstack[UIO_FASTIOV];
1098 struct iovec *iov=iovstack, *vector;
1105 * SuS says "The readv() function *may* fail if the iovcnt argument
1106 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1107 * traditionally returned zero for zero segments, so...
1114 * First get the "struct iovec" from user memory and
1115 * verify all the pointers
1118 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1122 if (nr_segs > UIO_FASTIOV) {
1124 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1129 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1133 * Single unix specification:
1134 * We should -EINVAL if an element length is not >= 0 and fitting an
1135 * ssize_t. The total length is fitting an ssize_t
1137 * Be careful here because iov_len is a size_t not an ssize_t
1142 for (seg = 0 ; seg < nr_segs; seg++) {
1143 compat_ssize_t tmp = tot_len;
1147 if (__get_user(len, &uvector->iov_len) ||
1148 __get_user(buf, &uvector->iov_base)) {
1152 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1155 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1157 vector->iov_base = compat_ptr(buf);
1158 vector->iov_len = (compat_size_t) len;
1167 ret = rw_verify_area(type, file, pos, tot_len);
1173 fn = file->f_op->read;
1174 fnv = file->f_op->aio_read;
1176 fn = (io_fn_t)file->f_op->write;
1177 fnv = file->f_op->aio_write;
1181 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1184 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1187 if (iov != iovstack)
1189 if ((ret + (type == READ)) > 0) {
1190 struct dentry *dentry = file->f_path.dentry;
1192 fsnotify_access(dentry);
1194 fsnotify_modify(dentry);
1200 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1203 ssize_t ret = -EBADF;
1209 if (!(file->f_mode & FMODE_READ))
1213 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1216 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1220 add_rchar(current, ret);
1227 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1230 ssize_t ret = -EBADF;
1235 if (!(file->f_mode & FMODE_WRITE))
1239 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1242 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1246 add_wchar(current, ret);
1253 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1254 unsigned int nr_segs, unsigned int flags)
1257 struct iovec __user *iov;
1258 if (nr_segs > UIO_MAXIOV)
1260 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1261 for (i = 0; i < nr_segs; i++) {
1262 struct compat_iovec v;
1263 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1264 get_user(v.iov_len, &iov32[i].iov_len) ||
1265 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1266 put_user(v.iov_len, &iov[i].iov_len))
1269 return sys_vmsplice(fd, iov, nr_segs, flags);
1273 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1277 compat_sys_open(const char __user *filename, int flags, int mode)
1279 return do_sys_open(AT_FDCWD, filename, flags, mode);
1283 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1287 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1289 return do_sys_open(dfd, filename, flags, mode);
1293 * compat_count() counts the number of arguments/envelopes. It is basically
1294 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1295 * and envp pointers.
1297 static int compat_count(compat_uptr_t __user *argv, int max)
1305 if (get_user(p, argv))
1318 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1319 * except that it works with 32 bit argv and envp pointers.
1321 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1322 struct linux_binprm *bprm)
1324 struct page *kmapped_page = NULL;
1326 unsigned long kpos = 0;
1329 while (argc-- > 0) {
1334 if (get_user(str, argv+argc) ||
1335 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1340 if (len > MAX_ARG_STRLEN) {
1345 /* We're going to work our way backwords. */
1351 int offset, bytes_to_copy;
1353 offset = pos % PAGE_SIZE;
1357 bytes_to_copy = offset;
1358 if (bytes_to_copy > len)
1359 bytes_to_copy = len;
1361 offset -= bytes_to_copy;
1362 pos -= bytes_to_copy;
1363 str -= bytes_to_copy;
1364 len -= bytes_to_copy;
1366 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1369 #ifdef CONFIG_STACK_GROWSUP
1370 ret = expand_stack_downwards(bprm->vma, pos);
1372 /* We've exceed the stack rlimit. */
1377 ret = get_user_pages(current, bprm->mm, pos,
1378 1, 1, 1, &page, NULL);
1380 /* We've exceed the stack rlimit. */
1386 flush_kernel_dcache_page(kmapped_page);
1387 kunmap(kmapped_page);
1388 put_page(kmapped_page);
1390 kmapped_page = page;
1391 kaddr = kmap(kmapped_page);
1392 kpos = pos & PAGE_MASK;
1393 flush_cache_page(bprm->vma, kpos,
1394 page_to_pfn(kmapped_page));
1396 if (copy_from_user(kaddr+offset, compat_ptr(str),
1406 flush_kernel_dcache_page(kmapped_page);
1407 kunmap(kmapped_page);
1408 put_page(kmapped_page);
1414 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1415 * that it processes 32 bit argv and envp pointers.
1417 int compat_do_execve(char * filename,
1418 compat_uptr_t __user *argv,
1419 compat_uptr_t __user *envp,
1420 struct pt_regs * regs)
1422 struct linux_binprm *bprm;
1424 struct files_struct *displaced;
1427 retval = unshare_files(&displaced);
1432 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1436 retval = mutex_lock_interruptible(¤t->cred_exec_mutex);
1439 current->in_execve = 1;
1442 bprm->cred = prepare_exec_creds();
1446 retval = check_unsafe_exec(bprm);
1450 file = open_exec(filename);
1451 retval = PTR_ERR(file);
1458 bprm->filename = filename;
1459 bprm->interp = filename;
1461 retval = bprm_mm_init(bprm);
1465 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1466 if ((retval = bprm->argc) < 0)
1469 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1470 if ((retval = bprm->envc) < 0)
1473 retval = prepare_binprm(bprm);
1477 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1481 bprm->exec = bprm->p;
1482 retval = compat_copy_strings(bprm->envc, envp, bprm);
1486 retval = compat_copy_strings(bprm->argc, argv, bprm);
1490 retval = search_binary_handler(bprm, regs);
1494 /* execve succeeded */
1495 write_lock(¤t->fs->lock);
1496 current->fs->in_exec = 0;
1497 write_unlock(¤t->fs->lock);
1498 current->in_execve = 0;
1499 mutex_unlock(¤t->cred_exec_mutex);
1500 acct_update_integrals(current);
1503 put_files_struct(displaced);
1512 allow_write_access(bprm->file);
1517 write_lock(¤t->fs->lock);
1518 current->fs->in_exec = 0;
1519 write_unlock(¤t->fs->lock);
1522 current->in_execve = 0;
1523 mutex_unlock(¤t->cred_exec_mutex);
1530 reset_files_struct(displaced);
1535 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1537 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1538 int timeval, int ret)
1545 if (current->personality & STICKY_TIMEOUTS)
1548 /* No update for zero timeout */
1549 if (!end_time->tv_sec && !end_time->tv_nsec)
1553 ts = timespec_sub(*end_time, ts);
1555 ts.tv_sec = ts.tv_nsec = 0;
1558 struct compat_timeval rtv;
1560 rtv.tv_sec = ts.tv_sec;
1561 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1563 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1566 struct compat_timespec rts;
1568 rts.tv_sec = ts.tv_sec;
1569 rts.tv_nsec = ts.tv_nsec;
1571 if (!copy_to_user(p, &rts, sizeof(rts)))
1575 * If an application puts its timeval in read-only memory, we
1576 * don't want the Linux-specific update to the timeval to
1577 * cause a fault after the select has completed
1578 * successfully. However, because we're not updating the
1579 * timeval, we can't restart the system call.
1583 if (ret == -ERESTARTNOHAND)
1589 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1590 * 64-bit unsigned longs.
1593 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1594 unsigned long *fdset)
1596 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1600 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1607 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1610 *fdset++ = h << 32 | l;
1613 if (odd && __get_user(*fdset, ufdset))
1616 /* Tricky, must clear full unsigned long in the
1617 * kernel fdset at the end, this makes sure that
1620 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1626 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1627 unsigned long *fdset)
1630 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1641 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1646 if (odd && __put_user(*fdset, ufdset))
1653 * This is a virtual copy of sys_select from fs/select.c and probably
1654 * should be compared to it from time to time
1658 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1659 * like to be certain this leads to no problems. So I return
1660 * EINTR just for safety.
1662 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1663 * I'm trying ERESTARTNOHAND which restart only when you want to.
1665 #define MAX_SELECT_SECONDS \
1666 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1668 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1669 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1670 struct timespec *end_time)
1674 int size, max_fds, ret = -EINVAL;
1675 struct fdtable *fdt;
1676 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1681 /* max_fds can increase, so grab it once to avoid race */
1683 fdt = files_fdtable(current->files);
1684 max_fds = fdt->max_fds;
1690 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1691 * since we used fdset we need to allocate memory in units of
1694 size = FDS_BYTES(n);
1696 if (size > sizeof(stack_fds) / 6) {
1697 bits = kmalloc(6 * size, GFP_KERNEL);
1702 fds.in = (unsigned long *) bits;
1703 fds.out = (unsigned long *) (bits + size);
1704 fds.ex = (unsigned long *) (bits + 2*size);
1705 fds.res_in = (unsigned long *) (bits + 3*size);
1706 fds.res_out = (unsigned long *) (bits + 4*size);
1707 fds.res_ex = (unsigned long *) (bits + 5*size);
1709 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1710 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1711 (ret = compat_get_fd_set(n, exp, fds.ex)))
1713 zero_fd_set(n, fds.res_in);
1714 zero_fd_set(n, fds.res_out);
1715 zero_fd_set(n, fds.res_ex);
1717 ret = do_select(n, &fds, end_time);
1722 ret = -ERESTARTNOHAND;
1723 if (signal_pending(current))
1728 if (compat_set_fd_set(n, inp, fds.res_in) ||
1729 compat_set_fd_set(n, outp, fds.res_out) ||
1730 compat_set_fd_set(n, exp, fds.res_ex))
1733 if (bits != stack_fds)
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)
1743 struct timespec end_time, *to = NULL;
1744 struct compat_timeval tv;
1748 if (copy_from_user(&tv, tvp, sizeof(tv)))
1752 if (poll_select_set_timeout(to,
1753 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1754 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1758 ret = compat_core_sys_select(n, inp, outp, exp, to);
1759 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1764 #ifdef HAVE_SET_RESTORE_SIGMASK
1765 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1766 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1767 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1768 compat_size_t sigsetsize)
1770 compat_sigset_t ss32;
1771 sigset_t ksigmask, sigsaved;
1772 struct compat_timespec ts;
1773 struct timespec end_time, *to = NULL;
1777 if (copy_from_user(&ts, tsp, sizeof(ts)))
1781 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1786 if (sigsetsize != sizeof(compat_sigset_t))
1788 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1790 sigset_from_compat(&ksigmask, &ss32);
1792 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1793 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1796 ret = compat_core_sys_select(n, inp, outp, exp, to);
1797 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1799 if (ret == -ERESTARTNOHAND) {
1801 * Don't restore the signal mask yet. Let do_signal() deliver
1802 * the signal on the way back to userspace, before the signal
1806 memcpy(¤t->saved_sigmask, &sigsaved,
1808 set_restore_sigmask();
1811 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1816 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1817 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1818 struct compat_timespec __user *tsp, void __user *sig)
1820 compat_size_t sigsetsize = 0;
1821 compat_uptr_t up = 0;
1824 if (!access_ok(VERIFY_READ, sig,
1825 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1826 __get_user(up, (compat_uptr_t __user *)sig) ||
1827 __get_user(sigsetsize,
1828 (compat_size_t __user *)(sig+sizeof(up))))
1831 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1835 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1836 unsigned int nfds, struct compat_timespec __user *tsp,
1837 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1839 compat_sigset_t ss32;
1840 sigset_t ksigmask, sigsaved;
1841 struct compat_timespec ts;
1842 struct timespec end_time, *to = NULL;
1846 if (copy_from_user(&ts, tsp, sizeof(ts)))
1850 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1855 if (sigsetsize != sizeof(compat_sigset_t))
1857 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1859 sigset_from_compat(&ksigmask, &ss32);
1861 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1862 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1865 ret = do_sys_poll(ufds, nfds, to);
1867 /* We can restart this syscall, usually */
1868 if (ret == -EINTR) {
1870 * Don't restore the signal mask yet. Let do_signal() deliver
1871 * the signal on the way back to userspace, before the signal
1875 memcpy(¤t->saved_sigmask, &sigsaved,
1877 set_restore_sigmask();
1879 ret = -ERESTARTNOHAND;
1881 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1883 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1887 #endif /* HAVE_SET_RESTORE_SIGMASK */
1889 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1890 /* Stuff for NFS server syscalls... */
1891 struct compat_nfsctl_svc {
1896 struct compat_nfsctl_client {
1897 s8 cl32_ident[NFSCLNT_IDMAX+1];
1899 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1902 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1905 struct compat_nfsctl_export {
1906 char ex32_client[NFSCLNT_IDMAX+1];
1907 char ex32_path[NFS_MAXPATHLEN+1];
1908 compat_dev_t ex32_dev;
1909 compat_ino_t ex32_ino;
1910 compat_int_t ex32_flags;
1911 __compat_uid_t ex32_anon_uid;
1912 __compat_gid_t ex32_anon_gid;
1915 struct compat_nfsctl_fdparm {
1916 struct sockaddr gd32_addr;
1917 s8 gd32_path[NFS_MAXPATHLEN+1];
1918 compat_int_t gd32_version;
1921 struct compat_nfsctl_fsparm {
1922 struct sockaddr gd32_addr;
1923 s8 gd32_path[NFS_MAXPATHLEN+1];
1924 compat_int_t gd32_maxlen;
1927 struct compat_nfsctl_arg {
1928 compat_int_t ca32_version; /* safeguard */
1930 struct compat_nfsctl_svc u32_svc;
1931 struct compat_nfsctl_client u32_client;
1932 struct compat_nfsctl_export u32_export;
1933 struct compat_nfsctl_fdparm u32_getfd;
1934 struct compat_nfsctl_fsparm u32_getfs;
1936 #define ca32_svc u.u32_svc
1937 #define ca32_client u.u32_client
1938 #define ca32_export u.u32_export
1939 #define ca32_getfd u.u32_getfd
1940 #define ca32_getfs u.u32_getfs
1943 union compat_nfsctl_res {
1944 __u8 cr32_getfh[NFS_FHSIZE];
1945 struct knfsd_fh cr32_getfs;
1948 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1949 struct compat_nfsctl_arg __user *arg)
1951 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1952 get_user(karg->ca_version, &arg->ca32_version) ||
1953 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1954 __get_user(karg->ca_svc.svc_nthreads,
1955 &arg->ca32_svc.svc32_nthreads))
1960 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1961 struct compat_nfsctl_arg __user *arg)
1963 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1964 sizeof(arg->ca32_client)) ||
1965 get_user(karg->ca_version, &arg->ca32_version) ||
1966 __copy_from_user(&karg->ca_client.cl_ident[0],
1967 &arg->ca32_client.cl32_ident[0],
1969 __get_user(karg->ca_client.cl_naddr,
1970 &arg->ca32_client.cl32_naddr) ||
1971 __copy_from_user(&karg->ca_client.cl_addrlist[0],
1972 &arg->ca32_client.cl32_addrlist[0],
1973 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
1974 __get_user(karg->ca_client.cl_fhkeytype,
1975 &arg->ca32_client.cl32_fhkeytype) ||
1976 __get_user(karg->ca_client.cl_fhkeylen,
1977 &arg->ca32_client.cl32_fhkeylen) ||
1978 __copy_from_user(&karg->ca_client.cl_fhkey[0],
1979 &arg->ca32_client.cl32_fhkey[0],
1986 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
1987 struct compat_nfsctl_arg __user *arg)
1989 if (!access_ok(VERIFY_READ, &arg->ca32_export,
1990 sizeof(arg->ca32_export)) ||
1991 get_user(karg->ca_version, &arg->ca32_version) ||
1992 __copy_from_user(&karg->ca_export.ex_client[0],
1993 &arg->ca32_export.ex32_client[0],
1995 __copy_from_user(&karg->ca_export.ex_path[0],
1996 &arg->ca32_export.ex32_path[0],
1998 __get_user(karg->ca_export.ex_dev,
1999 &arg->ca32_export.ex32_dev) ||
2000 __get_user(karg->ca_export.ex_ino,
2001 &arg->ca32_export.ex32_ino) ||
2002 __get_user(karg->ca_export.ex_flags,
2003 &arg->ca32_export.ex32_flags) ||
2004 __get_user(karg->ca_export.ex_anon_uid,
2005 &arg->ca32_export.ex32_anon_uid) ||
2006 __get_user(karg->ca_export.ex_anon_gid,
2007 &arg->ca32_export.ex32_anon_gid))
2009 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2010 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2015 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2016 struct compat_nfsctl_arg __user *arg)
2018 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2019 sizeof(arg->ca32_getfd)) ||
2020 get_user(karg->ca_version, &arg->ca32_version) ||
2021 __copy_from_user(&karg->ca_getfd.gd_addr,
2022 &arg->ca32_getfd.gd32_addr,
2023 (sizeof(struct sockaddr))) ||
2024 __copy_from_user(&karg->ca_getfd.gd_path,
2025 &arg->ca32_getfd.gd32_path,
2026 (NFS_MAXPATHLEN+1)) ||
2027 __get_user(karg->ca_getfd.gd_version,
2028 &arg->ca32_getfd.gd32_version))
2034 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2035 struct compat_nfsctl_arg __user *arg)
2037 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2038 get_user(karg->ca_version, &arg->ca32_version) ||
2039 __copy_from_user(&karg->ca_getfs.gd_addr,
2040 &arg->ca32_getfs.gd32_addr,
2041 (sizeof(struct sockaddr))) ||
2042 __copy_from_user(&karg->ca_getfs.gd_path,
2043 &arg->ca32_getfs.gd32_path,
2044 (NFS_MAXPATHLEN+1)) ||
2045 __get_user(karg->ca_getfs.gd_maxlen,
2046 &arg->ca32_getfs.gd32_maxlen))
2052 /* This really doesn't need translations, we are only passing
2053 * back a union which contains opaque nfs file handle data.
2055 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2056 union compat_nfsctl_res __user *res)
2060 err = copy_to_user(res, kres, sizeof(*res));
2062 return (err) ? -EFAULT : 0;
2065 asmlinkage long compat_sys_nfsservctl(int cmd,
2066 struct compat_nfsctl_arg __user *arg,
2067 union compat_nfsctl_res __user *res)
2069 struct nfsctl_arg *karg;
2070 union nfsctl_res *kres;
2074 karg = kmalloc(sizeof(*karg), GFP_USER);
2075 kres = kmalloc(sizeof(*kres), GFP_USER);
2076 if(!karg || !kres) {
2083 err = compat_nfs_svc_trans(karg, arg);
2086 case NFSCTL_ADDCLIENT:
2087 err = compat_nfs_clnt_trans(karg, arg);
2090 case NFSCTL_DELCLIENT:
2091 err = compat_nfs_clnt_trans(karg, arg);
2095 case NFSCTL_UNEXPORT:
2096 err = compat_nfs_exp_trans(karg, arg);
2100 err = compat_nfs_getfd_trans(karg, arg);
2104 err = compat_nfs_getfs_trans(karg, arg);
2117 /* The __user pointer casts are valid because of the set_fs() */
2118 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2124 if((cmd == NFSCTL_GETFD) ||
2125 (cmd == NFSCTL_GETFS))
2126 err = compat_nfs_getfh_res_trans(kres, res);
2134 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2136 return sys_ni_syscall();
2142 #ifdef HAVE_SET_RESTORE_SIGMASK
2143 asmlinkage long compat_sys_epoll_pwait(int epfd,
2144 struct compat_epoll_event __user *events,
2145 int maxevents, int timeout,
2146 const compat_sigset_t __user *sigmask,
2147 compat_size_t sigsetsize)
2150 compat_sigset_t csigmask;
2151 sigset_t ksigmask, sigsaved;
2154 * If the caller wants a certain signal mask to be set during the wait,
2158 if (sigsetsize != sizeof(compat_sigset_t))
2160 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2162 sigset_from_compat(&ksigmask, &csigmask);
2163 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2164 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2167 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2170 * If we changed the signal mask, we need to restore the original one.
2171 * In case we've got a signal while waiting, we do not restore the
2172 * signal mask yet, and we allow do_signal() to deliver the signal on
2173 * the way back to userspace, before the signal mask is restored.
2176 if (err == -EINTR) {
2177 memcpy(¤t->saved_sigmask, &sigsaved,
2179 set_restore_sigmask();
2181 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2186 #endif /* HAVE_SET_RESTORE_SIGMASK */
2188 #endif /* CONFIG_EPOLL */
2190 #ifdef CONFIG_SIGNALFD
2192 asmlinkage long compat_sys_signalfd4(int ufd,
2193 const compat_sigset_t __user *sigmask,
2194 compat_size_t sigsetsize, int flags)
2196 compat_sigset_t ss32;
2198 sigset_t __user *ksigmask;
2200 if (sigsetsize != sizeof(compat_sigset_t))
2202 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2204 sigset_from_compat(&tmp, &ss32);
2205 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2206 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2209 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2212 asmlinkage long compat_sys_signalfd(int ufd,
2213 const compat_sigset_t __user *sigmask,
2214 compat_size_t sigsetsize)
2216 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2218 #endif /* CONFIG_SIGNALFD */
2220 #ifdef CONFIG_TIMERFD
2222 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2223 const struct compat_itimerspec __user *utmr,
2224 struct compat_itimerspec __user *otmr)
2227 struct itimerspec t;
2228 struct itimerspec __user *ut;
2230 if (get_compat_itimerspec(&t, utmr))
2232 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2233 if (copy_to_user(&ut[0], &t, sizeof(t)))
2235 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2237 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2238 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2243 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2244 struct compat_itimerspec __user *otmr)
2247 struct itimerspec t;
2248 struct itimerspec __user *ut;
2250 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2251 error = sys_timerfd_gettime(ufd, ut);
2253 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2254 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2259 #endif /* CONFIG_TIMERFD */