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/syscalls.h>
36 #include <linux/ctype.h>
37 #include <linux/module.h>
38 #include <linux/dirent.h>
39 #include <linux/fsnotify.h>
40 #include <linux/highuid.h>
41 #include <linux/sunrpc/svc.h>
42 #include <linux/nfsd/nfsd.h>
43 #include <linux/nfsd/syscall.h>
44 #include <linux/personality.h>
45 #include <linux/rwsem.h>
46 #include <linux/tsacct_kern.h>
47 #include <linux/security.h>
48 #include <linux/highmem.h>
49 #include <linux/signal.h>
50 #include <linux/poll.h>
52 #include <linux/eventpoll.h>
53 #include <linux/fs_struct.h>
55 #include <asm/uaccess.h>
56 #include <asm/mmu_context.h>
57 #include <asm/ioctls.h>
62 int compat_printk(const char *fmt, ...)
69 ret = vprintk(fmt, ap);
74 #include "read_write.h"
77 * Not all architectures have sys_utime, so implement this in terms
80 asmlinkage long compat_sys_utime(char __user *filename, 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, 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, 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(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(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(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, char __user *filename,
198 struct compat_stat __user *statbuf, int flag)
203 error = vfs_fstatat(dfd, filename, &stat, flag);
206 return cp_compat_stat(&stat, statbuf);
210 asmlinkage long compat_sys_newfstat(unsigned int fd,
211 struct compat_stat __user * statbuf)
214 int error = vfs_fstat(fd, &stat);
217 error = cp_compat_stat(&stat, statbuf);
221 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
224 if (sizeof ubuf->f_blocks == 4) {
225 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
226 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
228 /* f_files and f_ffree may be -1; it's okay
229 * to stuff that into 32 bits */
230 if (kbuf->f_files != 0xffffffffffffffffULL
231 && (kbuf->f_files & 0xffffffff00000000ULL))
233 if (kbuf->f_ffree != 0xffffffffffffffffULL
234 && (kbuf->f_ffree & 0xffffffff00000000ULL))
237 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
238 __put_user(kbuf->f_type, &ubuf->f_type) ||
239 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
240 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
241 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
242 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
243 __put_user(kbuf->f_files, &ubuf->f_files) ||
244 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
245 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
246 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
247 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
248 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
249 __put_user(0, &ubuf->f_spare[0]) ||
250 __put_user(0, &ubuf->f_spare[1]) ||
251 __put_user(0, &ubuf->f_spare[2]) ||
252 __put_user(0, &ubuf->f_spare[3]) ||
253 __put_user(0, &ubuf->f_spare[4]))
259 * The following statfs calls are copies of code from fs/open.c and
260 * should be checked against those from time to time
262 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
267 error = user_path(pathname, &path);
270 error = vfs_statfs(path.dentry, &tmp);
272 error = put_compat_statfs(buf, &tmp);
278 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
288 error = vfs_statfs(file->f_path.dentry, &tmp);
290 error = put_compat_statfs(buf, &tmp);
296 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
298 if (sizeof ubuf->f_blocks == 4) {
299 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
300 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
302 /* f_files and f_ffree may be -1; it's okay
303 * to stuff that into 32 bits */
304 if (kbuf->f_files != 0xffffffffffffffffULL
305 && (kbuf->f_files & 0xffffffff00000000ULL))
307 if (kbuf->f_ffree != 0xffffffffffffffffULL
308 && (kbuf->f_ffree & 0xffffffff00000000ULL))
311 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
312 __put_user(kbuf->f_type, &ubuf->f_type) ||
313 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
314 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
315 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
316 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
317 __put_user(kbuf->f_files, &ubuf->f_files) ||
318 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
319 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
320 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
321 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
322 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
327 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
332 if (sz != sizeof(*buf))
335 error = user_path(pathname, &path);
338 error = vfs_statfs(path.dentry, &tmp);
340 error = put_compat_statfs64(buf, &tmp);
346 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
352 if (sz != sizeof(*buf))
359 error = vfs_statfs(file->f_path.dentry, &tmp);
361 error = put_compat_statfs64(buf, &tmp);
368 * This is a copy of sys_ustat, just dealing with a structure layout.
369 * Given how simple this syscall is that apporach is more maintainable
370 * than the various conversion hacks.
372 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
374 struct super_block *sb;
375 struct compat_ustat tmp;
379 sb = user_get_super(new_decode_dev(dev));
382 err = vfs_statfs(sb->s_root, &sbuf);
387 memset(&tmp, 0, sizeof(struct compat_ustat));
388 tmp.f_tfree = sbuf.f_bfree;
389 tmp.f_tinode = sbuf.f_ffree;
390 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
395 static int get_compat_flock(struct flock *kfl, struct compat_flock __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))
407 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
409 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
410 __put_user(kfl->l_type, &ufl->l_type) ||
411 __put_user(kfl->l_whence, &ufl->l_whence) ||
412 __put_user(kfl->l_start, &ufl->l_start) ||
413 __put_user(kfl->l_len, &ufl->l_len) ||
414 __put_user(kfl->l_pid, &ufl->l_pid))
419 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
420 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
422 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
423 __get_user(kfl->l_type, &ufl->l_type) ||
424 __get_user(kfl->l_whence, &ufl->l_whence) ||
425 __get_user(kfl->l_start, &ufl->l_start) ||
426 __get_user(kfl->l_len, &ufl->l_len) ||
427 __get_user(kfl->l_pid, &ufl->l_pid))
433 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
434 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
436 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
437 __put_user(kfl->l_type, &ufl->l_type) ||
438 __put_user(kfl->l_whence, &ufl->l_whence) ||
439 __put_user(kfl->l_start, &ufl->l_start) ||
440 __put_user(kfl->l_len, &ufl->l_len) ||
441 __put_user(kfl->l_pid, &ufl->l_pid))
447 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
458 ret = get_compat_flock(&f, compat_ptr(arg));
463 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
465 if (cmd == F_GETLK && ret == 0) {
466 /* GETLK was successful and we need to return the data...
467 * but it needs to fit in the compat structure.
468 * l_start shouldn't be too big, unless the original
469 * start + end is greater than COMPAT_OFF_T_MAX, in which
470 * case the app was asking for trouble, so we return
471 * -EOVERFLOW in that case.
472 * l_len could be too big, in which case we just truncate it,
473 * and only allow the app to see that part of the conflicting
474 * lock that might make sense to it anyway
477 if (f.l_start > COMPAT_OFF_T_MAX)
479 if (f.l_len > COMPAT_OFF_T_MAX)
480 f.l_len = COMPAT_OFF_T_MAX;
482 ret = put_compat_flock(&f, compat_ptr(arg));
489 ret = get_compat_flock64(&f, compat_ptr(arg));
494 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
495 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
498 if (cmd == F_GETLK64 && ret == 0) {
499 /* need to return lock information - see above for commentary */
500 if (f.l_start > COMPAT_LOFF_T_MAX)
502 if (f.l_len > COMPAT_LOFF_T_MAX)
503 f.l_len = COMPAT_LOFF_T_MAX;
505 ret = put_compat_flock64(&f, compat_ptr(arg));
510 ret = sys_fcntl(fd, cmd, arg);
516 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
519 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
521 return compat_sys_fcntl64(fd, cmd, arg);
525 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
530 mm_segment_t oldfs = get_fs();
531 if (unlikely(get_user(ctx64, ctx32p)))
535 /* The __user pointer cast is valid because of the set_fs() */
536 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
538 /* truncating is ok because it's a user address */
540 ret = put_user((u32) ctx64, ctx32p);
545 compat_sys_io_getevents(aio_context_t ctx_id,
546 unsigned long min_nr,
548 struct io_event __user *events,
549 struct compat_timespec __user *timeout)
553 struct timespec __user *ut = NULL;
556 if (unlikely(!access_ok(VERIFY_WRITE, events,
557 nr * sizeof(struct io_event))))
560 if (get_compat_timespec(&t, timeout))
563 ut = compat_alloc_user_space(sizeof(*ut));
564 if (copy_to_user(ut, &t, sizeof(t)) )
567 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
573 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
578 for (i = 0; i < nr; ++i) {
579 if (get_user(uptr, ptr32 + i))
581 if (put_user(compat_ptr(uptr), ptr64 + i))
587 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
590 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
592 struct iocb __user * __user *iocb64;
595 if (unlikely(nr < 0))
598 if (nr > MAX_AIO_SUBMITS)
599 nr = MAX_AIO_SUBMITS;
601 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
602 ret = copy_iocb(nr, iocb, iocb64);
604 ret = sys_io_submit(ctx_id, nr, iocb64);
608 struct compat_ncp_mount_data {
609 compat_int_t version;
610 compat_uint_t ncp_fd;
611 __compat_uid_t mounted_uid;
612 compat_pid_t wdog_pid;
613 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
614 compat_uint_t time_out;
615 compat_uint_t retry_count;
619 compat_mode_t file_mode;
620 compat_mode_t dir_mode;
623 struct compat_ncp_mount_data_v4 {
624 compat_int_t version;
625 compat_ulong_t flags;
626 compat_ulong_t mounted_uid;
627 compat_long_t wdog_pid;
628 compat_uint_t ncp_fd;
629 compat_uint_t time_out;
630 compat_uint_t retry_count;
633 compat_ulong_t file_mode;
634 compat_ulong_t dir_mode;
637 static void *do_ncp_super_data_conv(void *raw_data)
639 int version = *(unsigned int *)raw_data;
642 struct compat_ncp_mount_data *c_n = raw_data;
643 struct ncp_mount_data *n = raw_data;
645 n->dir_mode = c_n->dir_mode;
646 n->file_mode = c_n->file_mode;
649 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
650 n->wdog_pid = c_n->wdog_pid;
651 n->mounted_uid = c_n->mounted_uid;
652 } else if (version == 4) {
653 struct compat_ncp_mount_data_v4 *c_n = raw_data;
654 struct ncp_mount_data_v4 *n = raw_data;
656 n->dir_mode = c_n->dir_mode;
657 n->file_mode = c_n->file_mode;
660 n->retry_count = c_n->retry_count;
661 n->time_out = c_n->time_out;
662 n->ncp_fd = c_n->ncp_fd;
663 n->wdog_pid = c_n->wdog_pid;
664 n->mounted_uid = c_n->mounted_uid;
665 n->flags = c_n->flags;
666 } else if (version != 5) {
673 struct compat_smb_mount_data {
674 compat_int_t version;
675 __compat_uid_t mounted_uid;
678 compat_mode_t file_mode;
679 compat_mode_t dir_mode;
682 static void *do_smb_super_data_conv(void *raw_data)
684 struct smb_mount_data *s = raw_data;
685 struct compat_smb_mount_data *c_s = raw_data;
687 if (c_s->version != SMB_MOUNT_OLDVERSION)
689 s->dir_mode = c_s->dir_mode;
690 s->file_mode = c_s->file_mode;
693 s->mounted_uid = c_s->mounted_uid;
698 struct compat_nfs_string {
703 static inline void compat_nfs_string(struct nfs_string *dst,
704 struct compat_nfs_string *src)
706 dst->data = compat_ptr(src->data);
710 struct compat_nfs4_mount_data_v1 {
711 compat_int_t version;
716 compat_int_t retrans;
717 compat_int_t acregmin;
718 compat_int_t acregmax;
719 compat_int_t acdirmin;
720 compat_int_t acdirmax;
721 struct compat_nfs_string client_addr;
722 struct compat_nfs_string mnt_path;
723 struct compat_nfs_string hostname;
724 compat_uint_t host_addrlen;
725 compat_uptr_t host_addr;
727 compat_int_t auth_flavourlen;
728 compat_uptr_t auth_flavours;
731 static int do_nfs4_super_data_conv(void *raw_data)
733 int version = *(compat_uint_t *) raw_data;
736 struct compat_nfs4_mount_data_v1 *raw = raw_data;
737 struct nfs4_mount_data *real = raw_data;
739 /* copy the fields backwards */
740 real->auth_flavours = compat_ptr(raw->auth_flavours);
741 real->auth_flavourlen = raw->auth_flavourlen;
742 real->proto = raw->proto;
743 real->host_addr = compat_ptr(raw->host_addr);
744 real->host_addrlen = raw->host_addrlen;
745 compat_nfs_string(&real->hostname, &raw->hostname);
746 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
747 compat_nfs_string(&real->client_addr, &raw->client_addr);
748 real->acdirmax = raw->acdirmax;
749 real->acdirmin = raw->acdirmin;
750 real->acregmax = raw->acregmax;
751 real->acregmin = raw->acregmin;
752 real->retrans = raw->retrans;
753 real->timeo = raw->timeo;
754 real->wsize = raw->wsize;
755 real->rsize = raw->rsize;
756 real->flags = raw->flags;
757 real->version = raw->version;
763 #define SMBFS_NAME "smbfs"
764 #define NCPFS_NAME "ncpfs"
765 #define NFS4_NAME "nfs4"
767 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
768 char __user * type, unsigned long flags,
772 unsigned long data_page;
777 retval = copy_mount_string(type, &kernel_type);
781 dir_page = getname(dir_name);
782 retval = PTR_ERR(dir_page);
783 if (IS_ERR(dir_page))
786 retval = copy_mount_string(dev_name, &kernel_dev);
790 retval = copy_mount_options(data, &data_page);
796 if (kernel_type && data_page) {
797 if (!strcmp(kernel_type, SMBFS_NAME)) {
798 do_smb_super_data_conv((void *)data_page);
799 } else if (!strcmp(kernel_type, NCPFS_NAME)) {
800 do_ncp_super_data_conv((void *)data_page);
801 } else if (!strcmp(kernel_type, NFS4_NAME)) {
802 if (do_nfs4_super_data_conv((void *) data_page))
807 retval = do_mount(kernel_dev, dir_page, kernel_type,
808 flags, (void*)data_page);
811 free_page(data_page);
822 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
824 struct compat_old_linux_dirent {
825 compat_ulong_t d_ino;
826 compat_ulong_t d_offset;
827 unsigned short d_namlen;
831 struct compat_readdir_callback {
832 struct compat_old_linux_dirent __user *dirent;
836 static int compat_fillonedir(void *__buf, const char *name, int namlen,
837 loff_t offset, u64 ino, unsigned int d_type)
839 struct compat_readdir_callback *buf = __buf;
840 struct compat_old_linux_dirent __user *dirent;
841 compat_ulong_t d_ino;
846 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
847 buf->result = -EOVERFLOW;
851 dirent = buf->dirent;
852 if (!access_ok(VERIFY_WRITE, dirent,
853 (unsigned long)(dirent->d_name + namlen + 1) -
854 (unsigned long)dirent))
856 if ( __put_user(d_ino, &dirent->d_ino) ||
857 __put_user(offset, &dirent->d_offset) ||
858 __put_user(namlen, &dirent->d_namlen) ||
859 __copy_to_user(dirent->d_name, name, namlen) ||
860 __put_user(0, dirent->d_name + namlen))
864 buf->result = -EFAULT;
868 asmlinkage long compat_sys_old_readdir(unsigned int fd,
869 struct compat_old_linux_dirent __user *dirent, unsigned int count)
873 struct compat_readdir_callback buf;
883 error = vfs_readdir(file, compat_fillonedir, &buf);
892 struct compat_linux_dirent {
893 compat_ulong_t d_ino;
894 compat_ulong_t d_off;
895 unsigned short d_reclen;
899 struct compat_getdents_callback {
900 struct compat_linux_dirent __user *current_dir;
901 struct compat_linux_dirent __user *previous;
906 static int compat_filldir(void *__buf, const char *name, int namlen,
907 loff_t offset, u64 ino, unsigned int d_type)
909 struct compat_linux_dirent __user * dirent;
910 struct compat_getdents_callback *buf = __buf;
911 compat_ulong_t d_ino;
912 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
914 buf->error = -EINVAL; /* only used if we fail.. */
915 if (reclen > buf->count)
918 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
919 buf->error = -EOVERFLOW;
922 dirent = buf->previous;
924 if (__put_user(offset, &dirent->d_off))
927 dirent = buf->current_dir;
928 if (__put_user(d_ino, &dirent->d_ino))
930 if (__put_user(reclen, &dirent->d_reclen))
932 if (copy_to_user(dirent->d_name, name, namlen))
934 if (__put_user(0, dirent->d_name + namlen))
936 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
938 buf->previous = dirent;
939 dirent = (void __user *)dirent + reclen;
940 buf->current_dir = dirent;
941 buf->count -= reclen;
944 buf->error = -EFAULT;
948 asmlinkage long compat_sys_getdents(unsigned int fd,
949 struct compat_linux_dirent __user *dirent, unsigned int count)
952 struct compat_linux_dirent __user * lastdirent;
953 struct compat_getdents_callback buf;
957 if (!access_ok(VERIFY_WRITE, dirent, count))
965 buf.current_dir = dirent;
970 error = vfs_readdir(file, compat_filldir, &buf);
973 lastdirent = buf.previous;
975 if (put_user(file->f_pos, &lastdirent->d_off))
978 error = count - buf.count;
985 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
987 struct compat_getdents_callback64 {
988 struct linux_dirent64 __user *current_dir;
989 struct linux_dirent64 __user *previous;
994 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
995 u64 ino, unsigned int d_type)
997 struct linux_dirent64 __user *dirent;
998 struct compat_getdents_callback64 *buf = __buf;
999 int jj = NAME_OFFSET(dirent);
1000 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1003 buf->error = -EINVAL; /* only used if we fail.. */
1004 if (reclen > buf->count)
1006 dirent = buf->previous;
1009 if (__put_user_unaligned(offset, &dirent->d_off))
1012 dirent = buf->current_dir;
1013 if (__put_user_unaligned(ino, &dirent->d_ino))
1016 if (__put_user_unaligned(off, &dirent->d_off))
1018 if (__put_user(reclen, &dirent->d_reclen))
1020 if (__put_user(d_type, &dirent->d_type))
1022 if (copy_to_user(dirent->d_name, name, namlen))
1024 if (__put_user(0, dirent->d_name + namlen))
1026 buf->previous = dirent;
1027 dirent = (void __user *)dirent + reclen;
1028 buf->current_dir = dirent;
1029 buf->count -= reclen;
1032 buf->error = -EFAULT;
1036 asmlinkage long compat_sys_getdents64(unsigned int fd,
1037 struct linux_dirent64 __user * dirent, unsigned int count)
1040 struct linux_dirent64 __user * lastdirent;
1041 struct compat_getdents_callback64 buf;
1045 if (!access_ok(VERIFY_WRITE, dirent, count))
1053 buf.current_dir = dirent;
1054 buf.previous = NULL;
1058 error = vfs_readdir(file, compat_filldir64, &buf);
1061 lastdirent = buf.previous;
1063 typeof(lastdirent->d_off) d_off = file->f_pos;
1064 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1067 error = count - buf.count;
1073 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1075 static ssize_t compat_do_readv_writev(int type, struct file *file,
1076 const struct compat_iovec __user *uvector,
1077 unsigned long nr_segs, loff_t *pos)
1079 compat_ssize_t tot_len;
1080 struct iovec iovstack[UIO_FASTIOV];
1081 struct iovec *iov=iovstack, *vector;
1088 * SuS says "The readv() function *may* fail if the iovcnt argument
1089 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1090 * traditionally returned zero for zero segments, so...
1097 * First get the "struct iovec" from user memory and
1098 * verify all the pointers
1101 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1105 if (nr_segs > UIO_FASTIOV) {
1107 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1112 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1116 * Single unix specification:
1117 * We should -EINVAL if an element length is not >= 0 and fitting an
1118 * ssize_t. The total length is fitting an ssize_t
1120 * Be careful here because iov_len is a size_t not an ssize_t
1125 for (seg = 0 ; seg < nr_segs; seg++) {
1126 compat_ssize_t tmp = tot_len;
1130 if (__get_user(len, &uvector->iov_len) ||
1131 __get_user(buf, &uvector->iov_base)) {
1135 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1138 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1140 vector->iov_base = compat_ptr(buf);
1141 vector->iov_len = (compat_size_t) len;
1150 ret = rw_verify_area(type, file, pos, tot_len);
1156 fn = file->f_op->read;
1157 fnv = file->f_op->aio_read;
1159 fn = (io_fn_t)file->f_op->write;
1160 fnv = file->f_op->aio_write;
1164 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1167 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1170 if (iov != iovstack)
1172 if ((ret + (type == READ)) > 0) {
1173 struct dentry *dentry = file->f_path.dentry;
1175 fsnotify_access(dentry);
1177 fsnotify_modify(dentry);
1182 static size_t compat_readv(struct file *file,
1183 const struct compat_iovec __user *vec,
1184 unsigned long vlen, loff_t *pos)
1186 ssize_t ret = -EBADF;
1188 if (!(file->f_mode & FMODE_READ))
1192 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1195 ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
1199 add_rchar(current, ret);
1205 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
1212 file = fget_light(fd, &fput_needed);
1215 ret = compat_readv(file, vec, vlen, &file->f_pos);
1216 fput_light(file, fput_needed);
1221 compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
1222 unsigned long vlen, u32 pos_low, u32 pos_high)
1224 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1231 file = fget_light(fd, &fput_needed);
1234 ret = compat_readv(file, vec, vlen, &pos);
1235 fput_light(file, fput_needed);
1239 static size_t compat_writev(struct file *file,
1240 const struct compat_iovec __user *vec,
1241 unsigned long vlen, loff_t *pos)
1243 ssize_t ret = -EBADF;
1245 if (!(file->f_mode & FMODE_WRITE))
1249 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1252 ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
1256 add_wchar(current, ret);
1262 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
1269 file = fget_light(fd, &fput_needed);
1272 ret = compat_writev(file, vec, vlen, &file->f_pos);
1273 fput_light(file, fput_needed);
1278 compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
1279 unsigned long vlen, u32 pos_low, u32 pos_high)
1281 loff_t pos = ((loff_t)pos_high << 32) | pos_low;
1288 file = fget_light(fd, &fput_needed);
1291 ret = compat_writev(file, vec, vlen, &pos);
1292 fput_light(file, fput_needed);
1297 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1298 unsigned int nr_segs, unsigned int flags)
1301 struct iovec __user *iov;
1302 if (nr_segs > UIO_MAXIOV)
1304 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1305 for (i = 0; i < nr_segs; i++) {
1306 struct compat_iovec v;
1307 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1308 get_user(v.iov_len, &iov32[i].iov_len) ||
1309 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1310 put_user(v.iov_len, &iov[i].iov_len))
1313 return sys_vmsplice(fd, iov, nr_segs, flags);
1317 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1321 compat_sys_open(const char __user *filename, int flags, int mode)
1323 return do_sys_open(AT_FDCWD, filename, flags, mode);
1327 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1331 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1333 return do_sys_open(dfd, filename, flags, mode);
1337 * compat_count() counts the number of arguments/envelopes. It is basically
1338 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1339 * and envp pointers.
1341 static int compat_count(compat_uptr_t __user *argv, int max)
1349 if (get_user(p, argv))
1362 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1363 * except that it works with 32 bit argv and envp pointers.
1365 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1366 struct linux_binprm *bprm)
1368 struct page *kmapped_page = NULL;
1370 unsigned long kpos = 0;
1373 while (argc-- > 0) {
1378 if (get_user(str, argv+argc) ||
1379 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1384 if (len > MAX_ARG_STRLEN) {
1389 /* We're going to work our way backwords. */
1395 int offset, bytes_to_copy;
1397 offset = pos % PAGE_SIZE;
1401 bytes_to_copy = offset;
1402 if (bytes_to_copy > len)
1403 bytes_to_copy = len;
1405 offset -= bytes_to_copy;
1406 pos -= bytes_to_copy;
1407 str -= bytes_to_copy;
1408 len -= bytes_to_copy;
1410 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1413 #ifdef CONFIG_STACK_GROWSUP
1414 ret = expand_stack_downwards(bprm->vma, pos);
1416 /* We've exceed the stack rlimit. */
1421 ret = get_user_pages(current, bprm->mm, pos,
1422 1, 1, 1, &page, NULL);
1424 /* We've exceed the stack rlimit. */
1430 flush_kernel_dcache_page(kmapped_page);
1431 kunmap(kmapped_page);
1432 put_page(kmapped_page);
1434 kmapped_page = page;
1435 kaddr = kmap(kmapped_page);
1436 kpos = pos & PAGE_MASK;
1437 flush_cache_page(bprm->vma, kpos,
1438 page_to_pfn(kmapped_page));
1440 if (copy_from_user(kaddr+offset, compat_ptr(str),
1450 flush_kernel_dcache_page(kmapped_page);
1451 kunmap(kmapped_page);
1452 put_page(kmapped_page);
1458 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1459 * that it processes 32 bit argv and envp pointers.
1461 int compat_do_execve(char * filename,
1462 compat_uptr_t __user *argv,
1463 compat_uptr_t __user *envp,
1464 struct pt_regs * regs)
1466 struct linux_binprm *bprm;
1468 struct files_struct *displaced;
1472 retval = unshare_files(&displaced);
1477 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1481 retval = prepare_bprm_creds(bprm);
1485 retval = check_unsafe_exec(bprm);
1488 clear_in_exec = retval;
1489 current->in_execve = 1;
1491 file = open_exec(filename);
1492 retval = PTR_ERR(file);
1499 bprm->filename = filename;
1500 bprm->interp = filename;
1502 retval = bprm_mm_init(bprm);
1506 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1507 if ((retval = bprm->argc) < 0)
1510 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1511 if ((retval = bprm->envc) < 0)
1514 retval = prepare_binprm(bprm);
1518 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1522 bprm->exec = bprm->p;
1523 retval = compat_copy_strings(bprm->envc, envp, bprm);
1527 retval = compat_copy_strings(bprm->argc, argv, bprm);
1531 retval = search_binary_handler(bprm, regs);
1535 /* execve succeeded */
1536 current->fs->in_exec = 0;
1537 current->in_execve = 0;
1538 acct_update_integrals(current);
1541 put_files_struct(displaced);
1550 allow_write_access(bprm->file);
1556 current->fs->in_exec = 0;
1557 current->in_execve = 0;
1564 reset_files_struct(displaced);
1569 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1571 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1572 int timeval, int ret)
1579 if (current->personality & STICKY_TIMEOUTS)
1582 /* No update for zero timeout */
1583 if (!end_time->tv_sec && !end_time->tv_nsec)
1587 ts = timespec_sub(*end_time, ts);
1589 ts.tv_sec = ts.tv_nsec = 0;
1592 struct compat_timeval rtv;
1594 rtv.tv_sec = ts.tv_sec;
1595 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1597 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1600 struct compat_timespec rts;
1602 rts.tv_sec = ts.tv_sec;
1603 rts.tv_nsec = ts.tv_nsec;
1605 if (!copy_to_user(p, &rts, sizeof(rts)))
1609 * If an application puts its timeval in read-only memory, we
1610 * don't want the Linux-specific update to the timeval to
1611 * cause a fault after the select has completed
1612 * successfully. However, because we're not updating the
1613 * timeval, we can't restart the system call.
1617 if (ret == -ERESTARTNOHAND)
1623 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1624 * 64-bit unsigned longs.
1627 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1628 unsigned long *fdset)
1630 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1634 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1641 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1644 *fdset++ = h << 32 | l;
1647 if (odd && __get_user(*fdset, ufdset))
1650 /* Tricky, must clear full unsigned long in the
1651 * kernel fdset at the end, this makes sure that
1654 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1660 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1661 unsigned long *fdset)
1664 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1675 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1680 if (odd && __put_user(*fdset, ufdset))
1687 * This is a virtual copy of sys_select from fs/select.c and probably
1688 * should be compared to it from time to time
1692 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1693 * like to be certain this leads to no problems. So I return
1694 * EINTR just for safety.
1696 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1697 * I'm trying ERESTARTNOHAND which restart only when you want to.
1699 #define MAX_SELECT_SECONDS \
1700 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1702 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1703 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1704 struct timespec *end_time)
1708 int size, max_fds, ret = -EINVAL;
1709 struct fdtable *fdt;
1710 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1715 /* max_fds can increase, so grab it once to avoid race */
1717 fdt = files_fdtable(current->files);
1718 max_fds = fdt->max_fds;
1724 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1725 * since we used fdset we need to allocate memory in units of
1728 size = FDS_BYTES(n);
1730 if (size > sizeof(stack_fds) / 6) {
1731 bits = kmalloc(6 * size, GFP_KERNEL);
1736 fds.in = (unsigned long *) bits;
1737 fds.out = (unsigned long *) (bits + size);
1738 fds.ex = (unsigned long *) (bits + 2*size);
1739 fds.res_in = (unsigned long *) (bits + 3*size);
1740 fds.res_out = (unsigned long *) (bits + 4*size);
1741 fds.res_ex = (unsigned long *) (bits + 5*size);
1743 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1744 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1745 (ret = compat_get_fd_set(n, exp, fds.ex)))
1747 zero_fd_set(n, fds.res_in);
1748 zero_fd_set(n, fds.res_out);
1749 zero_fd_set(n, fds.res_ex);
1751 ret = do_select(n, &fds, end_time);
1756 ret = -ERESTARTNOHAND;
1757 if (signal_pending(current))
1762 if (compat_set_fd_set(n, inp, fds.res_in) ||
1763 compat_set_fd_set(n, outp, fds.res_out) ||
1764 compat_set_fd_set(n, exp, fds.res_ex))
1767 if (bits != stack_fds)
1773 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1774 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1775 struct compat_timeval __user *tvp)
1777 struct timespec end_time, *to = NULL;
1778 struct compat_timeval tv;
1782 if (copy_from_user(&tv, tvp, sizeof(tv)))
1786 if (poll_select_set_timeout(to,
1787 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1788 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1792 ret = compat_core_sys_select(n, inp, outp, exp, to);
1793 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1798 #ifdef HAVE_SET_RESTORE_SIGMASK
1799 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1800 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1801 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1802 compat_size_t sigsetsize)
1804 compat_sigset_t ss32;
1805 sigset_t ksigmask, sigsaved;
1806 struct compat_timespec ts;
1807 struct timespec end_time, *to = NULL;
1811 if (copy_from_user(&ts, tsp, sizeof(ts)))
1815 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1820 if (sigsetsize != sizeof(compat_sigset_t))
1822 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1824 sigset_from_compat(&ksigmask, &ss32);
1826 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1827 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1830 ret = compat_core_sys_select(n, inp, outp, exp, to);
1831 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1833 if (ret == -ERESTARTNOHAND) {
1835 * Don't restore the signal mask yet. Let do_signal() deliver
1836 * the signal on the way back to userspace, before the signal
1840 memcpy(¤t->saved_sigmask, &sigsaved,
1842 set_restore_sigmask();
1845 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1850 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1851 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1852 struct compat_timespec __user *tsp, void __user *sig)
1854 compat_size_t sigsetsize = 0;
1855 compat_uptr_t up = 0;
1858 if (!access_ok(VERIFY_READ, sig,
1859 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1860 __get_user(up, (compat_uptr_t __user *)sig) ||
1861 __get_user(sigsetsize,
1862 (compat_size_t __user *)(sig+sizeof(up))))
1865 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1869 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1870 unsigned int nfds, struct compat_timespec __user *tsp,
1871 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1873 compat_sigset_t ss32;
1874 sigset_t ksigmask, sigsaved;
1875 struct compat_timespec ts;
1876 struct timespec end_time, *to = NULL;
1880 if (copy_from_user(&ts, tsp, sizeof(ts)))
1884 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1889 if (sigsetsize != sizeof(compat_sigset_t))
1891 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1893 sigset_from_compat(&ksigmask, &ss32);
1895 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1896 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1899 ret = do_sys_poll(ufds, nfds, to);
1901 /* We can restart this syscall, usually */
1902 if (ret == -EINTR) {
1904 * Don't restore the signal mask yet. Let do_signal() deliver
1905 * the signal on the way back to userspace, before the signal
1909 memcpy(¤t->saved_sigmask, &sigsaved,
1911 set_restore_sigmask();
1913 ret = -ERESTARTNOHAND;
1915 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1917 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1921 #endif /* HAVE_SET_RESTORE_SIGMASK */
1923 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1924 /* Stuff for NFS server syscalls... */
1925 struct compat_nfsctl_svc {
1930 struct compat_nfsctl_client {
1931 s8 cl32_ident[NFSCLNT_IDMAX+1];
1933 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1936 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1939 struct compat_nfsctl_export {
1940 char ex32_client[NFSCLNT_IDMAX+1];
1941 char ex32_path[NFS_MAXPATHLEN+1];
1942 compat_dev_t ex32_dev;
1943 compat_ino_t ex32_ino;
1944 compat_int_t ex32_flags;
1945 __compat_uid_t ex32_anon_uid;
1946 __compat_gid_t ex32_anon_gid;
1949 struct compat_nfsctl_fdparm {
1950 struct sockaddr gd32_addr;
1951 s8 gd32_path[NFS_MAXPATHLEN+1];
1952 compat_int_t gd32_version;
1955 struct compat_nfsctl_fsparm {
1956 struct sockaddr gd32_addr;
1957 s8 gd32_path[NFS_MAXPATHLEN+1];
1958 compat_int_t gd32_maxlen;
1961 struct compat_nfsctl_arg {
1962 compat_int_t ca32_version; /* safeguard */
1964 struct compat_nfsctl_svc u32_svc;
1965 struct compat_nfsctl_client u32_client;
1966 struct compat_nfsctl_export u32_export;
1967 struct compat_nfsctl_fdparm u32_getfd;
1968 struct compat_nfsctl_fsparm u32_getfs;
1970 #define ca32_svc u.u32_svc
1971 #define ca32_client u.u32_client
1972 #define ca32_export u.u32_export
1973 #define ca32_getfd u.u32_getfd
1974 #define ca32_getfs u.u32_getfs
1977 union compat_nfsctl_res {
1978 __u8 cr32_getfh[NFS_FHSIZE];
1979 struct knfsd_fh cr32_getfs;
1982 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1983 struct compat_nfsctl_arg __user *arg)
1985 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1986 get_user(karg->ca_version, &arg->ca32_version) ||
1987 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1988 __get_user(karg->ca_svc.svc_nthreads,
1989 &arg->ca32_svc.svc32_nthreads))
1994 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1995 struct compat_nfsctl_arg __user *arg)
1997 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1998 sizeof(arg->ca32_client)) ||
1999 get_user(karg->ca_version, &arg->ca32_version) ||
2000 __copy_from_user(&karg->ca_client.cl_ident[0],
2001 &arg->ca32_client.cl32_ident[0],
2003 __get_user(karg->ca_client.cl_naddr,
2004 &arg->ca32_client.cl32_naddr) ||
2005 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2006 &arg->ca32_client.cl32_addrlist[0],
2007 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2008 __get_user(karg->ca_client.cl_fhkeytype,
2009 &arg->ca32_client.cl32_fhkeytype) ||
2010 __get_user(karg->ca_client.cl_fhkeylen,
2011 &arg->ca32_client.cl32_fhkeylen) ||
2012 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2013 &arg->ca32_client.cl32_fhkey[0],
2020 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2021 struct compat_nfsctl_arg __user *arg)
2023 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2024 sizeof(arg->ca32_export)) ||
2025 get_user(karg->ca_version, &arg->ca32_version) ||
2026 __copy_from_user(&karg->ca_export.ex_client[0],
2027 &arg->ca32_export.ex32_client[0],
2029 __copy_from_user(&karg->ca_export.ex_path[0],
2030 &arg->ca32_export.ex32_path[0],
2032 __get_user(karg->ca_export.ex_dev,
2033 &arg->ca32_export.ex32_dev) ||
2034 __get_user(karg->ca_export.ex_ino,
2035 &arg->ca32_export.ex32_ino) ||
2036 __get_user(karg->ca_export.ex_flags,
2037 &arg->ca32_export.ex32_flags) ||
2038 __get_user(karg->ca_export.ex_anon_uid,
2039 &arg->ca32_export.ex32_anon_uid) ||
2040 __get_user(karg->ca_export.ex_anon_gid,
2041 &arg->ca32_export.ex32_anon_gid))
2043 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2044 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2049 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2050 struct compat_nfsctl_arg __user *arg)
2052 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2053 sizeof(arg->ca32_getfd)) ||
2054 get_user(karg->ca_version, &arg->ca32_version) ||
2055 __copy_from_user(&karg->ca_getfd.gd_addr,
2056 &arg->ca32_getfd.gd32_addr,
2057 (sizeof(struct sockaddr))) ||
2058 __copy_from_user(&karg->ca_getfd.gd_path,
2059 &arg->ca32_getfd.gd32_path,
2060 (NFS_MAXPATHLEN+1)) ||
2061 __get_user(karg->ca_getfd.gd_version,
2062 &arg->ca32_getfd.gd32_version))
2068 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2069 struct compat_nfsctl_arg __user *arg)
2071 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2072 get_user(karg->ca_version, &arg->ca32_version) ||
2073 __copy_from_user(&karg->ca_getfs.gd_addr,
2074 &arg->ca32_getfs.gd32_addr,
2075 (sizeof(struct sockaddr))) ||
2076 __copy_from_user(&karg->ca_getfs.gd_path,
2077 &arg->ca32_getfs.gd32_path,
2078 (NFS_MAXPATHLEN+1)) ||
2079 __get_user(karg->ca_getfs.gd_maxlen,
2080 &arg->ca32_getfs.gd32_maxlen))
2086 /* This really doesn't need translations, we are only passing
2087 * back a union which contains opaque nfs file handle data.
2089 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2090 union compat_nfsctl_res __user *res)
2094 err = copy_to_user(res, kres, sizeof(*res));
2096 return (err) ? -EFAULT : 0;
2099 asmlinkage long compat_sys_nfsservctl(int cmd,
2100 struct compat_nfsctl_arg __user *arg,
2101 union compat_nfsctl_res __user *res)
2103 struct nfsctl_arg *karg;
2104 union nfsctl_res *kres;
2108 karg = kmalloc(sizeof(*karg), GFP_USER);
2109 kres = kmalloc(sizeof(*kres), GFP_USER);
2110 if(!karg || !kres) {
2117 err = compat_nfs_svc_trans(karg, arg);
2120 case NFSCTL_ADDCLIENT:
2121 err = compat_nfs_clnt_trans(karg, arg);
2124 case NFSCTL_DELCLIENT:
2125 err = compat_nfs_clnt_trans(karg, arg);
2129 case NFSCTL_UNEXPORT:
2130 err = compat_nfs_exp_trans(karg, arg);
2134 err = compat_nfs_getfd_trans(karg, arg);
2138 err = compat_nfs_getfs_trans(karg, arg);
2151 /* The __user pointer casts are valid because of the set_fs() */
2152 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2158 if((cmd == NFSCTL_GETFD) ||
2159 (cmd == NFSCTL_GETFS))
2160 err = compat_nfs_getfh_res_trans(kres, res);
2168 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2170 return sys_ni_syscall();
2176 #ifdef HAVE_SET_RESTORE_SIGMASK
2177 asmlinkage long compat_sys_epoll_pwait(int epfd,
2178 struct compat_epoll_event __user *events,
2179 int maxevents, int timeout,
2180 const compat_sigset_t __user *sigmask,
2181 compat_size_t sigsetsize)
2184 compat_sigset_t csigmask;
2185 sigset_t ksigmask, sigsaved;
2188 * If the caller wants a certain signal mask to be set during the wait,
2192 if (sigsetsize != sizeof(compat_sigset_t))
2194 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2196 sigset_from_compat(&ksigmask, &csigmask);
2197 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2198 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2201 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2204 * If we changed the signal mask, we need to restore the original one.
2205 * In case we've got a signal while waiting, we do not restore the
2206 * signal mask yet, and we allow do_signal() to deliver the signal on
2207 * the way back to userspace, before the signal mask is restored.
2210 if (err == -EINTR) {
2211 memcpy(¤t->saved_sigmask, &sigsaved,
2213 set_restore_sigmask();
2215 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2220 #endif /* HAVE_SET_RESTORE_SIGMASK */
2222 #endif /* CONFIG_EPOLL */
2224 #ifdef CONFIG_SIGNALFD
2226 asmlinkage long compat_sys_signalfd4(int ufd,
2227 const compat_sigset_t __user *sigmask,
2228 compat_size_t sigsetsize, int flags)
2230 compat_sigset_t ss32;
2232 sigset_t __user *ksigmask;
2234 if (sigsetsize != sizeof(compat_sigset_t))
2236 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2238 sigset_from_compat(&tmp, &ss32);
2239 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2240 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2243 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2246 asmlinkage long compat_sys_signalfd(int ufd,
2247 const compat_sigset_t __user *sigmask,
2248 compat_size_t sigsetsize)
2250 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2252 #endif /* CONFIG_SIGNALFD */
2254 #ifdef CONFIG_TIMERFD
2256 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2257 const struct compat_itimerspec __user *utmr,
2258 struct compat_itimerspec __user *otmr)
2261 struct itimerspec t;
2262 struct itimerspec __user *ut;
2264 if (get_compat_itimerspec(&t, utmr))
2266 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2267 if (copy_to_user(&ut[0], &t, sizeof(t)))
2269 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2271 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2272 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2277 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2278 struct compat_itimerspec __user *otmr)
2281 struct itimerspec t;
2282 struct itimerspec __user *ut;
2284 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2285 error = sys_timerfd_gettime(ufd, ut);
2287 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2288 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2293 #endif /* CONFIG_TIMERFD */