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@ucw.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/stddef.h>
19 #include <linux/kernel.h>
20 #include <linux/linkage.h>
21 #include <linux/compat.h>
22 #include <linux/errno.h>
23 #include <linux/time.h>
25 #include <linux/fcntl.h>
26 #include <linux/namei.h>
27 #include <linux/file.h>
28 #include <linux/fdtable.h>
29 #include <linux/vfs.h>
30 #include <linux/ioctl.h>
31 #include <linux/init.h>
32 #include <linux/ncp_mount.h>
33 #include <linux/nfs4_mount.h>
34 #include <linux/syscalls.h>
35 #include <linux/ctype.h>
36 #include <linux/module.h>
37 #include <linux/dirent.h>
38 #include <linux/fsnotify.h>
39 #include <linux/highuid.h>
40 #include <linux/nfsd/syscall.h>
41 #include <linux/personality.h>
42 #include <linux/rwsem.h>
43 #include <linux/tsacct_kern.h>
44 #include <linux/security.h>
45 #include <linux/highmem.h>
46 #include <linux/signal.h>
47 #include <linux/poll.h>
49 #include <linux/eventpoll.h>
50 #include <linux/fs_struct.h>
51 #include <linux/slab.h>
52 #include <linux/pagemap.h>
54 #include <asm/uaccess.h>
55 #include <asm/mmu_context.h>
56 #include <asm/ioctls.h>
61 int compat_printk(const char *fmt, ...)
68 ret = vprintk(fmt, ap);
73 #include "read_write.h"
76 * Not all architectures have sys_utime, so implement this in terms
79 asmlinkage long compat_sys_utime(const char __user *filename,
80 struct compat_utimbuf __user *t)
82 struct timespec tv[2];
85 if (get_user(tv[0].tv_sec, &t->actime) ||
86 get_user(tv[1].tv_sec, &t->modtime))
91 return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
94 asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags)
96 struct timespec tv[2];
99 if (get_compat_timespec(&tv[0], &t[0]) ||
100 get_compat_timespec(&tv[1], &t[1]))
103 if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
106 return do_utimes(dfd, filename, t ? tv : NULL, flags);
109 asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t)
111 struct timespec tv[2];
114 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
115 get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
116 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
117 get_user(tv[1].tv_nsec, &t[1].tv_usec))
119 if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
120 tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
122 tv[0].tv_nsec *= 1000;
123 tv[1].tv_nsec *= 1000;
125 return do_utimes(dfd, filename, t ? tv : NULL, 0);
128 asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t)
130 return compat_sys_futimesat(AT_FDCWD, filename, t);
133 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
135 compat_ino_t ino = stat->ino;
136 typeof(ubuf->st_uid) uid = 0;
137 typeof(ubuf->st_gid) gid = 0;
140 SET_UID(uid, stat->uid);
141 SET_GID(gid, stat->gid);
143 if ((u64) stat->size > MAX_NON_LFS ||
144 !old_valid_dev(stat->dev) ||
145 !old_valid_dev(stat->rdev))
147 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
150 if (clear_user(ubuf, sizeof(*ubuf)))
153 err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
154 err |= __put_user(ino, &ubuf->st_ino);
155 err |= __put_user(stat->mode, &ubuf->st_mode);
156 err |= __put_user(stat->nlink, &ubuf->st_nlink);
157 err |= __put_user(uid, &ubuf->st_uid);
158 err |= __put_user(gid, &ubuf->st_gid);
159 err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
160 err |= __put_user(stat->size, &ubuf->st_size);
161 err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
162 err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
163 err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
164 err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
165 err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
166 err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
167 err |= __put_user(stat->blksize, &ubuf->st_blksize);
168 err |= __put_user(stat->blocks, &ubuf->st_blocks);
172 asmlinkage long compat_sys_newstat(const char __user * filename,
173 struct compat_stat __user *statbuf)
178 error = vfs_stat(filename, &stat);
181 return cp_compat_stat(&stat, statbuf);
184 asmlinkage long compat_sys_newlstat(const char __user * filename,
185 struct compat_stat __user *statbuf)
190 error = vfs_lstat(filename, &stat);
193 return cp_compat_stat(&stat, statbuf);
196 #ifndef __ARCH_WANT_STAT64
197 asmlinkage long compat_sys_newfstatat(unsigned int dfd,
198 const char __user *filename,
199 struct compat_stat __user *statbuf, int flag)
204 error = vfs_fstatat(dfd, filename, &stat, flag);
207 return cp_compat_stat(&stat, statbuf);
211 asmlinkage long compat_sys_newfstat(unsigned int fd,
212 struct compat_stat __user * statbuf)
215 int error = vfs_fstat(fd, &stat);
218 error = cp_compat_stat(&stat, statbuf);
222 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
225 if (sizeof ubuf->f_blocks == 4) {
226 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
227 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
229 /* f_files and f_ffree may be -1; it's okay
230 * to stuff that into 32 bits */
231 if (kbuf->f_files != 0xffffffffffffffffULL
232 && (kbuf->f_files & 0xffffffff00000000ULL))
234 if (kbuf->f_ffree != 0xffffffffffffffffULL
235 && (kbuf->f_ffree & 0xffffffff00000000ULL))
238 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
239 __put_user(kbuf->f_type, &ubuf->f_type) ||
240 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
241 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
242 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
243 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
244 __put_user(kbuf->f_files, &ubuf->f_files) ||
245 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
246 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
247 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
248 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
249 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
250 __put_user(0, &ubuf->f_spare[0]) ||
251 __put_user(0, &ubuf->f_spare[1]) ||
252 __put_user(0, &ubuf->f_spare[2]) ||
253 __put_user(0, &ubuf->f_spare[3]) ||
254 __put_user(0, &ubuf->f_spare[4]))
260 * The following statfs calls are copies of code from fs/statfs.c and
261 * should be checked against those from time to time
263 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
266 int error = user_statfs(pathname, &tmp);
268 error = put_compat_statfs(buf, &tmp);
272 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
275 int error = fd_statfs(fd, &tmp);
277 error = put_compat_statfs(buf, &tmp);
281 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
283 if (sizeof ubuf->f_blocks == 4) {
284 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
285 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
287 /* f_files and f_ffree may be -1; it's okay
288 * to stuff that into 32 bits */
289 if (kbuf->f_files != 0xffffffffffffffffULL
290 && (kbuf->f_files & 0xffffffff00000000ULL))
292 if (kbuf->f_ffree != 0xffffffffffffffffULL
293 && (kbuf->f_ffree & 0xffffffff00000000ULL))
296 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
297 __put_user(kbuf->f_type, &ubuf->f_type) ||
298 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
299 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
300 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
301 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
302 __put_user(kbuf->f_files, &ubuf->f_files) ||
303 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
304 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
305 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
306 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
307 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
308 __put_user(kbuf->f_flags, &ubuf->f_flags) ||
309 __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
314 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
319 if (sz != sizeof(*buf))
322 error = user_statfs(pathname, &tmp);
324 error = put_compat_statfs64(buf, &tmp);
328 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
333 if (sz != sizeof(*buf))
336 error = fd_statfs(fd, &tmp);
338 error = put_compat_statfs64(buf, &tmp);
343 * This is a copy of sys_ustat, just dealing with a structure layout.
344 * Given how simple this syscall is that apporach is more maintainable
345 * than the various conversion hacks.
347 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
349 struct super_block *sb;
350 struct compat_ustat tmp;
354 sb = user_get_super(new_decode_dev(dev));
357 err = statfs_by_dentry(sb->s_root, &sbuf);
362 memset(&tmp, 0, sizeof(struct compat_ustat));
363 tmp.f_tfree = sbuf.f_bfree;
364 tmp.f_tinode = sbuf.f_ffree;
365 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
370 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
372 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
373 __get_user(kfl->l_type, &ufl->l_type) ||
374 __get_user(kfl->l_whence, &ufl->l_whence) ||
375 __get_user(kfl->l_start, &ufl->l_start) ||
376 __get_user(kfl->l_len, &ufl->l_len) ||
377 __get_user(kfl->l_pid, &ufl->l_pid))
382 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
384 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
385 __put_user(kfl->l_type, &ufl->l_type) ||
386 __put_user(kfl->l_whence, &ufl->l_whence) ||
387 __put_user(kfl->l_start, &ufl->l_start) ||
388 __put_user(kfl->l_len, &ufl->l_len) ||
389 __put_user(kfl->l_pid, &ufl->l_pid))
394 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
395 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
397 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
398 __get_user(kfl->l_type, &ufl->l_type) ||
399 __get_user(kfl->l_whence, &ufl->l_whence) ||
400 __get_user(kfl->l_start, &ufl->l_start) ||
401 __get_user(kfl->l_len, &ufl->l_len) ||
402 __get_user(kfl->l_pid, &ufl->l_pid))
408 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
409 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
411 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
412 __put_user(kfl->l_type, &ufl->l_type) ||
413 __put_user(kfl->l_whence, &ufl->l_whence) ||
414 __put_user(kfl->l_start, &ufl->l_start) ||
415 __put_user(kfl->l_len, &ufl->l_len) ||
416 __put_user(kfl->l_pid, &ufl->l_pid))
422 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
433 ret = get_compat_flock(&f, compat_ptr(arg));
438 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
440 if (cmd == F_GETLK && ret == 0) {
441 /* GETLK was successful and we need to return the data...
442 * but it needs to fit in the compat structure.
443 * l_start shouldn't be too big, unless the original
444 * start + end is greater than COMPAT_OFF_T_MAX, in which
445 * case the app was asking for trouble, so we return
446 * -EOVERFLOW in that case.
447 * l_len could be too big, in which case we just truncate it,
448 * and only allow the app to see that part of the conflicting
449 * lock that might make sense to it anyway
452 if (f.l_start > COMPAT_OFF_T_MAX)
454 if (f.l_len > COMPAT_OFF_T_MAX)
455 f.l_len = COMPAT_OFF_T_MAX;
457 ret = put_compat_flock(&f, compat_ptr(arg));
464 ret = get_compat_flock64(&f, compat_ptr(arg));
469 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
470 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
473 if (cmd == F_GETLK64 && ret == 0) {
474 /* need to return lock information - see above for commentary */
475 if (f.l_start > COMPAT_LOFF_T_MAX)
477 if (f.l_len > COMPAT_LOFF_T_MAX)
478 f.l_len = COMPAT_LOFF_T_MAX;
480 ret = put_compat_flock64(&f, compat_ptr(arg));
485 ret = sys_fcntl(fd, cmd, arg);
491 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
494 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
496 return compat_sys_fcntl64(fd, cmd, arg);
500 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
505 mm_segment_t oldfs = get_fs();
506 if (unlikely(get_user(ctx64, ctx32p)))
510 /* The __user pointer cast is valid because of the set_fs() */
511 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
513 /* truncating is ok because it's a user address */
515 ret = put_user((u32) ctx64, ctx32p);
520 compat_sys_io_getevents(aio_context_t ctx_id,
521 unsigned long min_nr,
523 struct io_event __user *events,
524 struct compat_timespec __user *timeout)
528 struct timespec __user *ut = NULL;
531 if (unlikely(!access_ok(VERIFY_WRITE, events,
532 nr * sizeof(struct io_event))))
535 if (get_compat_timespec(&t, timeout))
538 ut = compat_alloc_user_space(sizeof(*ut));
539 if (copy_to_user(ut, &t, sizeof(t)) )
542 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
547 /* A write operation does a read from user space and vice versa */
548 #define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
550 ssize_t compat_rw_copy_check_uvector(int type,
551 const struct compat_iovec __user *uvector, unsigned long nr_segs,
552 unsigned long fast_segs, struct iovec *fast_pointer,
553 struct iovec **ret_pointer)
555 compat_ssize_t tot_len;
556 struct iovec *iov = *ret_pointer = fast_pointer;
561 * SuS says "The readv() function *may* fail if the iovcnt argument
562 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
563 * traditionally returned zero for zero segments, so...
569 if (nr_segs > UIO_MAXIOV || nr_segs < 0)
571 if (nr_segs > fast_segs) {
573 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
580 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
584 * Single unix specification:
585 * We should -EINVAL if an element length is not >= 0 and fitting an
588 * In Linux, the total length is limited to MAX_RW_COUNT, there is
589 * no overflow possibility.
593 for (seg = 0; seg < nr_segs; seg++) {
597 if (__get_user(len, &uvector->iov_len) ||
598 __get_user(buf, &uvector->iov_base)) {
602 if (len < 0) /* size_t not fitting in compat_ssize_t .. */
604 if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
608 if (len > MAX_RW_COUNT - tot_len)
609 len = MAX_RW_COUNT - tot_len;
611 iov->iov_base = compat_ptr(buf);
612 iov->iov_len = (compat_size_t) len;
623 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
628 for (i = 0; i < nr; ++i) {
629 if (get_user(uptr, ptr32 + i))
631 if (put_user(compat_ptr(uptr), ptr64 + i))
637 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
640 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
642 struct iocb __user * __user *iocb64;
645 if (unlikely(nr < 0))
648 if (nr > MAX_AIO_SUBMITS)
649 nr = MAX_AIO_SUBMITS;
651 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
652 ret = copy_iocb(nr, iocb, iocb64);
654 ret = do_io_submit(ctx_id, nr, iocb64, 1);
658 struct compat_ncp_mount_data {
659 compat_int_t version;
660 compat_uint_t ncp_fd;
661 __compat_uid_t mounted_uid;
662 compat_pid_t wdog_pid;
663 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
664 compat_uint_t time_out;
665 compat_uint_t retry_count;
669 compat_mode_t file_mode;
670 compat_mode_t dir_mode;
673 struct compat_ncp_mount_data_v4 {
674 compat_int_t version;
675 compat_ulong_t flags;
676 compat_ulong_t mounted_uid;
677 compat_long_t wdog_pid;
678 compat_uint_t ncp_fd;
679 compat_uint_t time_out;
680 compat_uint_t retry_count;
683 compat_ulong_t file_mode;
684 compat_ulong_t dir_mode;
687 static void *do_ncp_super_data_conv(void *raw_data)
689 int version = *(unsigned int *)raw_data;
692 struct compat_ncp_mount_data *c_n = raw_data;
693 struct ncp_mount_data *n = raw_data;
695 n->dir_mode = c_n->dir_mode;
696 n->file_mode = c_n->file_mode;
699 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
700 n->wdog_pid = c_n->wdog_pid;
701 n->mounted_uid = c_n->mounted_uid;
702 } else if (version == 4) {
703 struct compat_ncp_mount_data_v4 *c_n = raw_data;
704 struct ncp_mount_data_v4 *n = raw_data;
706 n->dir_mode = c_n->dir_mode;
707 n->file_mode = c_n->file_mode;
710 n->retry_count = c_n->retry_count;
711 n->time_out = c_n->time_out;
712 n->ncp_fd = c_n->ncp_fd;
713 n->wdog_pid = c_n->wdog_pid;
714 n->mounted_uid = c_n->mounted_uid;
715 n->flags = c_n->flags;
716 } else if (version != 5) {
724 struct compat_nfs_string {
729 static inline void compat_nfs_string(struct nfs_string *dst,
730 struct compat_nfs_string *src)
732 dst->data = compat_ptr(src->data);
736 struct compat_nfs4_mount_data_v1 {
737 compat_int_t version;
742 compat_int_t retrans;
743 compat_int_t acregmin;
744 compat_int_t acregmax;
745 compat_int_t acdirmin;
746 compat_int_t acdirmax;
747 struct compat_nfs_string client_addr;
748 struct compat_nfs_string mnt_path;
749 struct compat_nfs_string hostname;
750 compat_uint_t host_addrlen;
751 compat_uptr_t host_addr;
753 compat_int_t auth_flavourlen;
754 compat_uptr_t auth_flavours;
757 static int do_nfs4_super_data_conv(void *raw_data)
759 int version = *(compat_uint_t *) raw_data;
762 struct compat_nfs4_mount_data_v1 *raw = raw_data;
763 struct nfs4_mount_data *real = raw_data;
765 /* copy the fields backwards */
766 real->auth_flavours = compat_ptr(raw->auth_flavours);
767 real->auth_flavourlen = raw->auth_flavourlen;
768 real->proto = raw->proto;
769 real->host_addr = compat_ptr(raw->host_addr);
770 real->host_addrlen = raw->host_addrlen;
771 compat_nfs_string(&real->hostname, &raw->hostname);
772 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
773 compat_nfs_string(&real->client_addr, &raw->client_addr);
774 real->acdirmax = raw->acdirmax;
775 real->acdirmin = raw->acdirmin;
776 real->acregmax = raw->acregmax;
777 real->acregmin = raw->acregmin;
778 real->retrans = raw->retrans;
779 real->timeo = raw->timeo;
780 real->wsize = raw->wsize;
781 real->rsize = raw->rsize;
782 real->flags = raw->flags;
783 real->version = raw->version;
789 #define NCPFS_NAME "ncpfs"
790 #define NFS4_NAME "nfs4"
792 asmlinkage long compat_sys_mount(const char __user * dev_name,
793 const char __user * dir_name,
794 const char __user * type, unsigned long flags,
795 const void __user * data)
798 unsigned long data_page;
803 retval = copy_mount_string(type, &kernel_type);
807 dir_page = getname(dir_name);
808 retval = PTR_ERR(dir_page);
809 if (IS_ERR(dir_page))
812 retval = copy_mount_string(dev_name, &kernel_dev);
816 retval = copy_mount_options(data, &data_page);
822 if (kernel_type && data_page) {
823 if (!strcmp(kernel_type, NCPFS_NAME)) {
824 do_ncp_super_data_conv((void *)data_page);
825 } else if (!strcmp(kernel_type, NFS4_NAME)) {
826 if (do_nfs4_super_data_conv((void *) data_page))
831 retval = do_mount(kernel_dev, dir_page, kernel_type,
832 flags, (void*)data_page);
835 free_page(data_page);
846 struct compat_old_linux_dirent {
847 compat_ulong_t d_ino;
848 compat_ulong_t d_offset;
849 unsigned short d_namlen;
853 struct compat_readdir_callback {
854 struct compat_old_linux_dirent __user *dirent;
858 static int compat_fillonedir(void *__buf, const char *name, int namlen,
859 loff_t offset, u64 ino, unsigned int d_type)
861 struct compat_readdir_callback *buf = __buf;
862 struct compat_old_linux_dirent __user *dirent;
863 compat_ulong_t d_ino;
868 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
869 buf->result = -EOVERFLOW;
873 dirent = buf->dirent;
874 if (!access_ok(VERIFY_WRITE, dirent,
875 (unsigned long)(dirent->d_name + namlen + 1) -
876 (unsigned long)dirent))
878 if ( __put_user(d_ino, &dirent->d_ino) ||
879 __put_user(offset, &dirent->d_offset) ||
880 __put_user(namlen, &dirent->d_namlen) ||
881 __copy_to_user(dirent->d_name, name, namlen) ||
882 __put_user(0, dirent->d_name + namlen))
886 buf->result = -EFAULT;
890 asmlinkage long compat_sys_old_readdir(unsigned int fd,
891 struct compat_old_linux_dirent __user *dirent, unsigned int count)
895 struct compat_readdir_callback buf;
905 error = vfs_readdir(file, compat_fillonedir, &buf);
914 struct compat_linux_dirent {
915 compat_ulong_t d_ino;
916 compat_ulong_t d_off;
917 unsigned short d_reclen;
921 struct compat_getdents_callback {
922 struct compat_linux_dirent __user *current_dir;
923 struct compat_linux_dirent __user *previous;
928 static int compat_filldir(void *__buf, const char *name, int namlen,
929 loff_t offset, u64 ino, unsigned int d_type)
931 struct compat_linux_dirent __user * dirent;
932 struct compat_getdents_callback *buf = __buf;
933 compat_ulong_t d_ino;
934 int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
935 namlen + 2, sizeof(compat_long_t));
937 buf->error = -EINVAL; /* only used if we fail.. */
938 if (reclen > buf->count)
941 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
942 buf->error = -EOVERFLOW;
945 dirent = buf->previous;
947 if (__put_user(offset, &dirent->d_off))
950 dirent = buf->current_dir;
951 if (__put_user(d_ino, &dirent->d_ino))
953 if (__put_user(reclen, &dirent->d_reclen))
955 if (copy_to_user(dirent->d_name, name, namlen))
957 if (__put_user(0, dirent->d_name + namlen))
959 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
961 buf->previous = dirent;
962 dirent = (void __user *)dirent + reclen;
963 buf->current_dir = dirent;
964 buf->count -= reclen;
967 buf->error = -EFAULT;
971 asmlinkage long compat_sys_getdents(unsigned int fd,
972 struct compat_linux_dirent __user *dirent, unsigned int count)
975 struct compat_linux_dirent __user * lastdirent;
976 struct compat_getdents_callback buf;
980 if (!access_ok(VERIFY_WRITE, dirent, count))
988 buf.current_dir = dirent;
993 error = vfs_readdir(file, compat_filldir, &buf);
996 lastdirent = buf.previous;
998 if (put_user(file->f_pos, &lastdirent->d_off))
1001 error = count - buf.count;
1008 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1010 struct compat_getdents_callback64 {
1011 struct linux_dirent64 __user *current_dir;
1012 struct linux_dirent64 __user *previous;
1017 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1018 u64 ino, unsigned int d_type)
1020 struct linux_dirent64 __user *dirent;
1021 struct compat_getdents_callback64 *buf = __buf;
1022 int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
1026 buf->error = -EINVAL; /* only used if we fail.. */
1027 if (reclen > buf->count)
1029 dirent = buf->previous;
1032 if (__put_user_unaligned(offset, &dirent->d_off))
1035 dirent = buf->current_dir;
1036 if (__put_user_unaligned(ino, &dirent->d_ino))
1039 if (__put_user_unaligned(off, &dirent->d_off))
1041 if (__put_user(reclen, &dirent->d_reclen))
1043 if (__put_user(d_type, &dirent->d_type))
1045 if (copy_to_user(dirent->d_name, name, namlen))
1047 if (__put_user(0, dirent->d_name + namlen))
1049 buf->previous = dirent;
1050 dirent = (void __user *)dirent + reclen;
1051 buf->current_dir = dirent;
1052 buf->count -= reclen;
1055 buf->error = -EFAULT;
1059 asmlinkage long compat_sys_getdents64(unsigned int fd,
1060 struct linux_dirent64 __user * dirent, unsigned int count)
1063 struct linux_dirent64 __user * lastdirent;
1064 struct compat_getdents_callback64 buf;
1068 if (!access_ok(VERIFY_WRITE, dirent, count))
1076 buf.current_dir = dirent;
1077 buf.previous = NULL;
1081 error = vfs_readdir(file, compat_filldir64, &buf);
1084 lastdirent = buf.previous;
1086 typeof(lastdirent->d_off) d_off = file->f_pos;
1087 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1090 error = count - buf.count;
1096 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1098 static ssize_t compat_do_readv_writev(int type, struct file *file,
1099 const struct compat_iovec __user *uvector,
1100 unsigned long nr_segs, loff_t *pos)
1102 compat_ssize_t tot_len;
1103 struct iovec iovstack[UIO_FASTIOV];
1104 struct iovec *iov = iovstack;
1113 ret = compat_rw_copy_check_uvector(type, uvector, nr_segs,
1114 UIO_FASTIOV, iovstack, &iov);
1119 ret = rw_verify_area(type, file, pos, tot_len);
1125 fn = file->f_op->read;
1126 fnv = file->f_op->aio_read;
1128 fn = (io_fn_t)file->f_op->write;
1129 fnv = file->f_op->aio_write;
1133 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1136 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1139 if (iov != iovstack)
1141 if ((ret + (type == READ)) > 0) {
1143 fsnotify_access(file);
1145 fsnotify_modify(file);
1150 static size_t compat_readv(struct file *file,
1151 const struct compat_iovec __user *vec,
1152 unsigned long vlen, loff_t *pos)
1154 ssize_t ret = -EBADF;
1156 if (!(file->f_mode & FMODE_READ))
1160 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1163 ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
1167 add_rchar(current, ret);
1173 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
1181 file = fget_light(fd, &fput_needed);
1185 ret = compat_readv(file, vec, vlen, &pos);
1187 fput_light(file, fput_needed);
1192 compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
1193 unsigned long vlen, u32 pos_low, u32 pos_high)
1195 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1202 file = fget_light(fd, &fput_needed);
1206 if (file->f_mode & FMODE_PREAD)
1207 ret = compat_readv(file, vec, vlen, &pos);
1208 fput_light(file, fput_needed);
1212 static size_t compat_writev(struct file *file,
1213 const struct compat_iovec __user *vec,
1214 unsigned long vlen, loff_t *pos)
1216 ssize_t ret = -EBADF;
1218 if (!(file->f_mode & FMODE_WRITE))
1222 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1225 ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
1229 add_wchar(current, ret);
1235 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
1243 file = fget_light(fd, &fput_needed);
1247 ret = compat_writev(file, vec, vlen, &pos);
1249 fput_light(file, fput_needed);
1254 compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
1255 unsigned long vlen, u32 pos_low, u32 pos_high)
1257 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1264 file = fget_light(fd, &fput_needed);
1268 if (file->f_mode & FMODE_PWRITE)
1269 ret = compat_writev(file, vec, vlen, &pos);
1270 fput_light(file, fput_needed);
1275 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1276 unsigned int nr_segs, unsigned int flags)
1279 struct iovec __user *iov;
1280 if (nr_segs > UIO_MAXIOV)
1282 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1283 for (i = 0; i < nr_segs; i++) {
1284 struct compat_iovec v;
1285 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1286 get_user(v.iov_len, &iov32[i].iov_len) ||
1287 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1288 put_user(v.iov_len, &iov[i].iov_len))
1291 return sys_vmsplice(fd, iov, nr_segs, flags);
1295 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1299 compat_sys_open(const char __user *filename, int flags, int mode)
1301 return do_sys_open(AT_FDCWD, filename, flags, mode);
1305 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1309 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1311 return do_sys_open(dfd, filename, flags, mode);
1314 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1316 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1317 int timeval, int ret)
1324 if (current->personality & STICKY_TIMEOUTS)
1327 /* No update for zero timeout */
1328 if (!end_time->tv_sec && !end_time->tv_nsec)
1332 ts = timespec_sub(*end_time, ts);
1334 ts.tv_sec = ts.tv_nsec = 0;
1337 struct compat_timeval rtv;
1339 rtv.tv_sec = ts.tv_sec;
1340 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1342 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1345 struct compat_timespec rts;
1347 rts.tv_sec = ts.tv_sec;
1348 rts.tv_nsec = ts.tv_nsec;
1350 if (!copy_to_user(p, &rts, sizeof(rts)))
1354 * If an application puts its timeval in read-only memory, we
1355 * don't want the Linux-specific update to the timeval to
1356 * cause a fault after the select has completed
1357 * successfully. However, because we're not updating the
1358 * timeval, we can't restart the system call.
1362 if (ret == -ERESTARTNOHAND)
1368 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1369 * 64-bit unsigned longs.
1372 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1373 unsigned long *fdset)
1375 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1379 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1386 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1389 *fdset++ = h << 32 | l;
1392 if (odd && __get_user(*fdset, ufdset))
1395 /* Tricky, must clear full unsigned long in the
1396 * kernel fdset at the end, this makes sure that
1399 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1405 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1406 unsigned long *fdset)
1409 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1420 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1425 if (odd && __put_user(*fdset, ufdset))
1432 * This is a virtual copy of sys_select from fs/select.c and probably
1433 * should be compared to it from time to time
1437 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1438 * like to be certain this leads to no problems. So I return
1439 * EINTR just for safety.
1441 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1442 * I'm trying ERESTARTNOHAND which restart only when you want to.
1444 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1445 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1446 struct timespec *end_time)
1450 int size, max_fds, ret = -EINVAL;
1451 struct fdtable *fdt;
1452 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1457 /* max_fds can increase, so grab it once to avoid race */
1459 fdt = files_fdtable(current->files);
1460 max_fds = fdt->max_fds;
1466 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1467 * since we used fdset we need to allocate memory in units of
1470 size = FDS_BYTES(n);
1472 if (size > sizeof(stack_fds) / 6) {
1473 bits = kmalloc(6 * size, GFP_KERNEL);
1478 fds.in = (unsigned long *) bits;
1479 fds.out = (unsigned long *) (bits + size);
1480 fds.ex = (unsigned long *) (bits + 2*size);
1481 fds.res_in = (unsigned long *) (bits + 3*size);
1482 fds.res_out = (unsigned long *) (bits + 4*size);
1483 fds.res_ex = (unsigned long *) (bits + 5*size);
1485 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1486 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1487 (ret = compat_get_fd_set(n, exp, fds.ex)))
1489 zero_fd_set(n, fds.res_in);
1490 zero_fd_set(n, fds.res_out);
1491 zero_fd_set(n, fds.res_ex);
1493 ret = do_select(n, &fds, end_time);
1498 ret = -ERESTARTNOHAND;
1499 if (signal_pending(current))
1504 if (compat_set_fd_set(n, inp, fds.res_in) ||
1505 compat_set_fd_set(n, outp, fds.res_out) ||
1506 compat_set_fd_set(n, exp, fds.res_ex))
1509 if (bits != stack_fds)
1515 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1516 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1517 struct compat_timeval __user *tvp)
1519 struct timespec end_time, *to = NULL;
1520 struct compat_timeval tv;
1524 if (copy_from_user(&tv, tvp, sizeof(tv)))
1528 if (poll_select_set_timeout(to,
1529 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1530 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1534 ret = compat_core_sys_select(n, inp, outp, exp, to);
1535 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1540 struct compat_sel_arg_struct {
1548 asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
1550 struct compat_sel_arg_struct a;
1552 if (copy_from_user(&a, arg, sizeof(a)))
1554 return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
1555 compat_ptr(a.exp), compat_ptr(a.tvp));
1558 #ifdef HAVE_SET_RESTORE_SIGMASK
1559 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1560 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1561 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1562 compat_size_t sigsetsize)
1564 compat_sigset_t ss32;
1565 sigset_t ksigmask, sigsaved;
1566 struct compat_timespec ts;
1567 struct timespec end_time, *to = NULL;
1571 if (copy_from_user(&ts, tsp, sizeof(ts)))
1575 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1580 if (sigsetsize != sizeof(compat_sigset_t))
1582 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1584 sigset_from_compat(&ksigmask, &ss32);
1586 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1587 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1590 ret = compat_core_sys_select(n, inp, outp, exp, to);
1591 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1593 if (ret == -ERESTARTNOHAND) {
1595 * Don't restore the signal mask yet. Let do_signal() deliver
1596 * the signal on the way back to userspace, before the signal
1600 memcpy(¤t->saved_sigmask, &sigsaved,
1602 set_restore_sigmask();
1605 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1610 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1611 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1612 struct compat_timespec __user *tsp, void __user *sig)
1614 compat_size_t sigsetsize = 0;
1615 compat_uptr_t up = 0;
1618 if (!access_ok(VERIFY_READ, sig,
1619 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1620 __get_user(up, (compat_uptr_t __user *)sig) ||
1621 __get_user(sigsetsize,
1622 (compat_size_t __user *)(sig+sizeof(up))))
1625 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1629 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1630 unsigned int nfds, struct compat_timespec __user *tsp,
1631 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1633 compat_sigset_t ss32;
1634 sigset_t ksigmask, sigsaved;
1635 struct compat_timespec ts;
1636 struct timespec end_time, *to = NULL;
1640 if (copy_from_user(&ts, tsp, sizeof(ts)))
1644 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1649 if (sigsetsize != sizeof(compat_sigset_t))
1651 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1653 sigset_from_compat(&ksigmask, &ss32);
1655 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1656 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1659 ret = do_sys_poll(ufds, nfds, to);
1661 /* We can restart this syscall, usually */
1662 if (ret == -EINTR) {
1664 * Don't restore the signal mask yet. Let do_signal() deliver
1665 * the signal on the way back to userspace, before the signal
1669 memcpy(¤t->saved_sigmask, &sigsaved,
1671 set_restore_sigmask();
1673 ret = -ERESTARTNOHAND;
1675 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1677 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1681 #endif /* HAVE_SET_RESTORE_SIGMASK */
1683 #if (defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)) && !defined(CONFIG_NFSD_DEPRECATED)
1684 /* Stuff for NFS server syscalls... */
1685 struct compat_nfsctl_svc {
1690 struct compat_nfsctl_client {
1691 s8 cl32_ident[NFSCLNT_IDMAX+1];
1693 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1696 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1699 struct compat_nfsctl_export {
1700 char ex32_client[NFSCLNT_IDMAX+1];
1701 char ex32_path[NFS_MAXPATHLEN+1];
1702 compat_dev_t ex32_dev;
1703 compat_ino_t ex32_ino;
1704 compat_int_t ex32_flags;
1705 __compat_uid_t ex32_anon_uid;
1706 __compat_gid_t ex32_anon_gid;
1709 struct compat_nfsctl_fdparm {
1710 struct sockaddr gd32_addr;
1711 s8 gd32_path[NFS_MAXPATHLEN+1];
1712 compat_int_t gd32_version;
1715 struct compat_nfsctl_fsparm {
1716 struct sockaddr gd32_addr;
1717 s8 gd32_path[NFS_MAXPATHLEN+1];
1718 compat_int_t gd32_maxlen;
1721 struct compat_nfsctl_arg {
1722 compat_int_t ca32_version; /* safeguard */
1724 struct compat_nfsctl_svc u32_svc;
1725 struct compat_nfsctl_client u32_client;
1726 struct compat_nfsctl_export u32_export;
1727 struct compat_nfsctl_fdparm u32_getfd;
1728 struct compat_nfsctl_fsparm u32_getfs;
1730 #define ca32_svc u.u32_svc
1731 #define ca32_client u.u32_client
1732 #define ca32_export u.u32_export
1733 #define ca32_getfd u.u32_getfd
1734 #define ca32_getfs u.u32_getfs
1737 union compat_nfsctl_res {
1738 __u8 cr32_getfh[NFS_FHSIZE];
1739 struct knfsd_fh cr32_getfs;
1742 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1743 struct compat_nfsctl_arg __user *arg)
1745 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1746 get_user(karg->ca_version, &arg->ca32_version) ||
1747 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1748 __get_user(karg->ca_svc.svc_nthreads,
1749 &arg->ca32_svc.svc32_nthreads))
1754 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1755 struct compat_nfsctl_arg __user *arg)
1757 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1758 sizeof(arg->ca32_client)) ||
1759 get_user(karg->ca_version, &arg->ca32_version) ||
1760 __copy_from_user(&karg->ca_client.cl_ident[0],
1761 &arg->ca32_client.cl32_ident[0],
1763 __get_user(karg->ca_client.cl_naddr,
1764 &arg->ca32_client.cl32_naddr) ||
1765 __copy_from_user(&karg->ca_client.cl_addrlist[0],
1766 &arg->ca32_client.cl32_addrlist[0],
1767 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
1768 __get_user(karg->ca_client.cl_fhkeytype,
1769 &arg->ca32_client.cl32_fhkeytype) ||
1770 __get_user(karg->ca_client.cl_fhkeylen,
1771 &arg->ca32_client.cl32_fhkeylen) ||
1772 __copy_from_user(&karg->ca_client.cl_fhkey[0],
1773 &arg->ca32_client.cl32_fhkey[0],
1780 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
1781 struct compat_nfsctl_arg __user *arg)
1783 if (!access_ok(VERIFY_READ, &arg->ca32_export,
1784 sizeof(arg->ca32_export)) ||
1785 get_user(karg->ca_version, &arg->ca32_version) ||
1786 __copy_from_user(&karg->ca_export.ex_client[0],
1787 &arg->ca32_export.ex32_client[0],
1789 __copy_from_user(&karg->ca_export.ex_path[0],
1790 &arg->ca32_export.ex32_path[0],
1792 __get_user(karg->ca_export.ex_dev,
1793 &arg->ca32_export.ex32_dev) ||
1794 __get_user(karg->ca_export.ex_ino,
1795 &arg->ca32_export.ex32_ino) ||
1796 __get_user(karg->ca_export.ex_flags,
1797 &arg->ca32_export.ex32_flags) ||
1798 __get_user(karg->ca_export.ex_anon_uid,
1799 &arg->ca32_export.ex32_anon_uid) ||
1800 __get_user(karg->ca_export.ex_anon_gid,
1801 &arg->ca32_export.ex32_anon_gid))
1803 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1804 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1809 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
1810 struct compat_nfsctl_arg __user *arg)
1812 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
1813 sizeof(arg->ca32_getfd)) ||
1814 get_user(karg->ca_version, &arg->ca32_version) ||
1815 __copy_from_user(&karg->ca_getfd.gd_addr,
1816 &arg->ca32_getfd.gd32_addr,
1817 (sizeof(struct sockaddr))) ||
1818 __copy_from_user(&karg->ca_getfd.gd_path,
1819 &arg->ca32_getfd.gd32_path,
1820 (NFS_MAXPATHLEN+1)) ||
1821 __get_user(karg->ca_getfd.gd_version,
1822 &arg->ca32_getfd.gd32_version))
1828 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
1829 struct compat_nfsctl_arg __user *arg)
1831 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
1832 get_user(karg->ca_version, &arg->ca32_version) ||
1833 __copy_from_user(&karg->ca_getfs.gd_addr,
1834 &arg->ca32_getfs.gd32_addr,
1835 (sizeof(struct sockaddr))) ||
1836 __copy_from_user(&karg->ca_getfs.gd_path,
1837 &arg->ca32_getfs.gd32_path,
1838 (NFS_MAXPATHLEN+1)) ||
1839 __get_user(karg->ca_getfs.gd_maxlen,
1840 &arg->ca32_getfs.gd32_maxlen))
1846 /* This really doesn't need translations, we are only passing
1847 * back a union which contains opaque nfs file handle data.
1849 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
1850 union compat_nfsctl_res __user *res)
1854 err = copy_to_user(res, kres, sizeof(*res));
1856 return (err) ? -EFAULT : 0;
1859 asmlinkage long compat_sys_nfsservctl(int cmd,
1860 struct compat_nfsctl_arg __user *arg,
1861 union compat_nfsctl_res __user *res)
1863 struct nfsctl_arg *karg;
1864 union nfsctl_res *kres;
1868 karg = kmalloc(sizeof(*karg), GFP_USER);
1869 kres = kmalloc(sizeof(*kres), GFP_USER);
1870 if(!karg || !kres) {
1877 err = compat_nfs_svc_trans(karg, arg);
1880 case NFSCTL_ADDCLIENT:
1881 err = compat_nfs_clnt_trans(karg, arg);
1884 case NFSCTL_DELCLIENT:
1885 err = compat_nfs_clnt_trans(karg, arg);
1889 case NFSCTL_UNEXPORT:
1890 err = compat_nfs_exp_trans(karg, arg);
1894 err = compat_nfs_getfd_trans(karg, arg);
1898 err = compat_nfs_getfs_trans(karg, arg);
1911 /* The __user pointer casts are valid because of the set_fs() */
1912 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
1918 if((cmd == NFSCTL_GETFD) ||
1919 (cmd == NFSCTL_GETFS))
1920 err = compat_nfs_getfh_res_trans(kres, res);
1928 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
1930 return sys_ni_syscall();
1936 #ifdef HAVE_SET_RESTORE_SIGMASK
1937 asmlinkage long compat_sys_epoll_pwait(int epfd,
1938 struct compat_epoll_event __user *events,
1939 int maxevents, int timeout,
1940 const compat_sigset_t __user *sigmask,
1941 compat_size_t sigsetsize)
1944 compat_sigset_t csigmask;
1945 sigset_t ksigmask, sigsaved;
1948 * If the caller wants a certain signal mask to be set during the wait,
1952 if (sigsetsize != sizeof(compat_sigset_t))
1954 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
1956 sigset_from_compat(&ksigmask, &csigmask);
1957 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
1958 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1961 err = sys_epoll_wait(epfd, events, maxevents, timeout);
1964 * If we changed the signal mask, we need to restore the original one.
1965 * In case we've got a signal while waiting, we do not restore the
1966 * signal mask yet, and we allow do_signal() to deliver the signal on
1967 * the way back to userspace, before the signal mask is restored.
1970 if (err == -EINTR) {
1971 memcpy(¤t->saved_sigmask, &sigsaved,
1973 set_restore_sigmask();
1975 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1980 #endif /* HAVE_SET_RESTORE_SIGMASK */
1982 #endif /* CONFIG_EPOLL */
1984 #ifdef CONFIG_SIGNALFD
1986 asmlinkage long compat_sys_signalfd4(int ufd,
1987 const compat_sigset_t __user *sigmask,
1988 compat_size_t sigsetsize, int flags)
1990 compat_sigset_t ss32;
1992 sigset_t __user *ksigmask;
1994 if (sigsetsize != sizeof(compat_sigset_t))
1996 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1998 sigset_from_compat(&tmp, &ss32);
1999 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2000 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2003 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2006 asmlinkage long compat_sys_signalfd(int ufd,
2007 const compat_sigset_t __user *sigmask,
2008 compat_size_t sigsetsize)
2010 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2012 #endif /* CONFIG_SIGNALFD */
2014 #ifdef CONFIG_TIMERFD
2016 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2017 const struct compat_itimerspec __user *utmr,
2018 struct compat_itimerspec __user *otmr)
2021 struct itimerspec t;
2022 struct itimerspec __user *ut;
2024 if (get_compat_itimerspec(&t, utmr))
2026 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2027 if (copy_to_user(&ut[0], &t, sizeof(t)))
2029 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2031 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2032 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2037 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2038 struct compat_itimerspec __user *otmr)
2041 struct itimerspec t;
2042 struct itimerspec __user *ut;
2044 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2045 error = sys_timerfd_gettime(ufd, ut);
2047 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2048 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2053 #endif /* CONFIG_TIMERFD */
2055 #ifdef CONFIG_FHANDLE
2057 * Exactly like fs/open.c:sys_open_by_handle_at(), except that it
2058 * doesn't set the O_LARGEFILE flag.
2061 compat_sys_open_by_handle_at(int mountdirfd,
2062 struct file_handle __user *handle, int flags)
2064 return do_handle_open(mountdirfd, handle, flags);