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>
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[0].tv_nsec == UTIME_NOW)
104 && tv[0].tv_sec != 0)
106 if ((tv[1].tv_nsec == UTIME_OMIT || tv[1].tv_nsec == UTIME_NOW)
107 && tv[1].tv_sec != 0)
110 if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
113 return do_utimes(dfd, filename, t ? tv : NULL, flags);
116 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
118 struct timespec tv[2];
121 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
122 get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
123 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
124 get_user(tv[1].tv_nsec, &t[1].tv_usec))
126 if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
127 tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
129 tv[0].tv_nsec *= 1000;
130 tv[1].tv_nsec *= 1000;
132 return do_utimes(dfd, filename, t ? tv : NULL, 0);
135 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
137 return compat_sys_futimesat(AT_FDCWD, filename, t);
140 static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
142 compat_ino_t ino = stat->ino;
143 typeof(ubuf->st_uid) uid = 0;
144 typeof(ubuf->st_gid) gid = 0;
147 SET_UID(uid, stat->uid);
148 SET_GID(gid, stat->gid);
150 if ((u64) stat->size > MAX_NON_LFS ||
151 !old_valid_dev(stat->dev) ||
152 !old_valid_dev(stat->rdev))
154 if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
157 if (clear_user(ubuf, sizeof(*ubuf)))
160 err = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
161 err |= __put_user(ino, &ubuf->st_ino);
162 err |= __put_user(stat->mode, &ubuf->st_mode);
163 err |= __put_user(stat->nlink, &ubuf->st_nlink);
164 err |= __put_user(uid, &ubuf->st_uid);
165 err |= __put_user(gid, &ubuf->st_gid);
166 err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
167 err |= __put_user(stat->size, &ubuf->st_size);
168 err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
169 err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
170 err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
171 err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
172 err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
173 err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
174 err |= __put_user(stat->blksize, &ubuf->st_blksize);
175 err |= __put_user(stat->blocks, &ubuf->st_blocks);
179 asmlinkage long compat_sys_newstat(char __user * filename,
180 struct compat_stat __user *statbuf)
183 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
186 error = cp_compat_stat(&stat, statbuf);
190 asmlinkage long compat_sys_newlstat(char __user * filename,
191 struct compat_stat __user *statbuf)
194 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
197 error = cp_compat_stat(&stat, statbuf);
201 #ifndef __ARCH_WANT_STAT64
202 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
203 struct compat_stat __user *statbuf, int flag)
208 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
211 if (flag & AT_SYMLINK_NOFOLLOW)
212 error = vfs_lstat_fd(dfd, filename, &stat);
214 error = vfs_stat_fd(dfd, filename, &stat);
217 error = cp_compat_stat(&stat, statbuf);
224 asmlinkage long compat_sys_newfstat(unsigned int fd,
225 struct compat_stat __user * statbuf)
228 int error = vfs_fstat(fd, &stat);
231 error = cp_compat_stat(&stat, statbuf);
235 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
238 if (sizeof ubuf->f_blocks == 4) {
239 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
240 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
242 /* f_files and f_ffree may be -1; it's okay
243 * to stuff that into 32 bits */
244 if (kbuf->f_files != 0xffffffffffffffffULL
245 && (kbuf->f_files & 0xffffffff00000000ULL))
247 if (kbuf->f_ffree != 0xffffffffffffffffULL
248 && (kbuf->f_ffree & 0xffffffff00000000ULL))
251 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
252 __put_user(kbuf->f_type, &ubuf->f_type) ||
253 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
254 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
255 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
256 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
257 __put_user(kbuf->f_files, &ubuf->f_files) ||
258 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
259 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
260 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
261 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
262 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
263 __put_user(0, &ubuf->f_spare[0]) ||
264 __put_user(0, &ubuf->f_spare[1]) ||
265 __put_user(0, &ubuf->f_spare[2]) ||
266 __put_user(0, &ubuf->f_spare[3]) ||
267 __put_user(0, &ubuf->f_spare[4]))
273 * The following statfs calls are copies of code from fs/open.c and
274 * should be checked against those from time to time
276 asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
281 error = user_path(pathname, &path);
284 error = vfs_statfs(path.dentry, &tmp);
286 error = put_compat_statfs(buf, &tmp);
292 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
302 error = vfs_statfs(file->f_path.dentry, &tmp);
304 error = put_compat_statfs(buf, &tmp);
310 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
312 if (sizeof ubuf->f_blocks == 4) {
313 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
314 kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
316 /* f_files and f_ffree may be -1; it's okay
317 * to stuff that into 32 bits */
318 if (kbuf->f_files != 0xffffffffffffffffULL
319 && (kbuf->f_files & 0xffffffff00000000ULL))
321 if (kbuf->f_ffree != 0xffffffffffffffffULL
322 && (kbuf->f_ffree & 0xffffffff00000000ULL))
325 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
326 __put_user(kbuf->f_type, &ubuf->f_type) ||
327 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
328 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
329 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
330 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
331 __put_user(kbuf->f_files, &ubuf->f_files) ||
332 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
333 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
334 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
335 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
336 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
341 asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
346 if (sz != sizeof(*buf))
349 error = user_path(pathname, &path);
352 error = vfs_statfs(path.dentry, &tmp);
354 error = put_compat_statfs64(buf, &tmp);
360 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
366 if (sz != sizeof(*buf))
373 error = vfs_statfs(file->f_path.dentry, &tmp);
375 error = put_compat_statfs64(buf, &tmp);
382 * This is a copy of sys_ustat, just dealing with a structure layout.
383 * Given how simple this syscall is that apporach is more maintainable
384 * than the various conversion hacks.
386 asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
388 struct super_block *sb;
389 struct compat_ustat tmp;
393 sb = user_get_super(new_decode_dev(dev));
396 err = vfs_statfs(sb->s_root, &sbuf);
401 memset(&tmp, 0, sizeof(struct compat_ustat));
402 tmp.f_tfree = sbuf.f_bfree;
403 tmp.f_tinode = sbuf.f_ffree;
404 if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
409 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
411 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
412 __get_user(kfl->l_type, &ufl->l_type) ||
413 __get_user(kfl->l_whence, &ufl->l_whence) ||
414 __get_user(kfl->l_start, &ufl->l_start) ||
415 __get_user(kfl->l_len, &ufl->l_len) ||
416 __get_user(kfl->l_pid, &ufl->l_pid))
421 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
423 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
424 __put_user(kfl->l_type, &ufl->l_type) ||
425 __put_user(kfl->l_whence, &ufl->l_whence) ||
426 __put_user(kfl->l_start, &ufl->l_start) ||
427 __put_user(kfl->l_len, &ufl->l_len) ||
428 __put_user(kfl->l_pid, &ufl->l_pid))
433 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
434 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
436 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
437 __get_user(kfl->l_type, &ufl->l_type) ||
438 __get_user(kfl->l_whence, &ufl->l_whence) ||
439 __get_user(kfl->l_start, &ufl->l_start) ||
440 __get_user(kfl->l_len, &ufl->l_len) ||
441 __get_user(kfl->l_pid, &ufl->l_pid))
447 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
448 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
450 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
451 __put_user(kfl->l_type, &ufl->l_type) ||
452 __put_user(kfl->l_whence, &ufl->l_whence) ||
453 __put_user(kfl->l_start, &ufl->l_start) ||
454 __put_user(kfl->l_len, &ufl->l_len) ||
455 __put_user(kfl->l_pid, &ufl->l_pid))
461 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
472 ret = get_compat_flock(&f, compat_ptr(arg));
477 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
479 if (cmd == F_GETLK && ret == 0) {
480 /* GETLK was successfule and we need to return the data...
481 * but it needs to fit in the compat structure.
482 * l_start shouldn't be too big, unless the original
483 * start + end is greater than COMPAT_OFF_T_MAX, in which
484 * case the app was asking for trouble, so we return
485 * -EOVERFLOW in that case.
486 * l_len could be too big, in which case we just truncate it,
487 * and only allow the app to see that part of the conflicting
488 * lock that might make sense to it anyway
491 if (f.l_start > COMPAT_OFF_T_MAX)
493 if (f.l_len > COMPAT_OFF_T_MAX)
494 f.l_len = COMPAT_OFF_T_MAX;
496 ret = put_compat_flock(&f, compat_ptr(arg));
503 ret = get_compat_flock64(&f, compat_ptr(arg));
508 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
509 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
512 if (cmd == F_GETLK64 && ret == 0) {
513 /* need to return lock information - see above for commentary */
514 if (f.l_start > COMPAT_LOFF_T_MAX)
516 if (f.l_len > COMPAT_LOFF_T_MAX)
517 f.l_len = COMPAT_LOFF_T_MAX;
519 ret = put_compat_flock64(&f, compat_ptr(arg));
524 ret = sys_fcntl(fd, cmd, arg);
530 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
533 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
535 return compat_sys_fcntl64(fd, cmd, arg);
539 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
544 mm_segment_t oldfs = get_fs();
545 if (unlikely(get_user(ctx64, ctx32p)))
549 /* The __user pointer cast is valid because of the set_fs() */
550 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
552 /* truncating is ok because it's a user address */
554 ret = put_user((u32) ctx64, ctx32p);
559 compat_sys_io_getevents(aio_context_t ctx_id,
560 unsigned long min_nr,
562 struct io_event __user *events,
563 struct compat_timespec __user *timeout)
567 struct timespec __user *ut = NULL;
570 if (unlikely(!access_ok(VERIFY_WRITE, events,
571 nr * sizeof(struct io_event))))
574 if (get_compat_timespec(&t, timeout))
577 ut = compat_alloc_user_space(sizeof(*ut));
578 if (copy_to_user(ut, &t, sizeof(t)) )
581 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
587 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
592 for (i = 0; i < nr; ++i) {
593 if (get_user(uptr, ptr32 + i))
595 if (put_user(compat_ptr(uptr), ptr64 + i))
601 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
604 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
606 struct iocb __user * __user *iocb64;
609 if (unlikely(nr < 0))
612 if (nr > MAX_AIO_SUBMITS)
613 nr = MAX_AIO_SUBMITS;
615 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
616 ret = copy_iocb(nr, iocb, iocb64);
618 ret = sys_io_submit(ctx_id, nr, iocb64);
622 struct compat_ncp_mount_data {
623 compat_int_t version;
624 compat_uint_t ncp_fd;
625 __compat_uid_t mounted_uid;
626 compat_pid_t wdog_pid;
627 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
628 compat_uint_t time_out;
629 compat_uint_t retry_count;
633 compat_mode_t file_mode;
634 compat_mode_t dir_mode;
637 struct compat_ncp_mount_data_v4 {
638 compat_int_t version;
639 compat_ulong_t flags;
640 compat_ulong_t mounted_uid;
641 compat_long_t wdog_pid;
642 compat_uint_t ncp_fd;
643 compat_uint_t time_out;
644 compat_uint_t retry_count;
647 compat_ulong_t file_mode;
648 compat_ulong_t dir_mode;
651 static void *do_ncp_super_data_conv(void *raw_data)
653 int version = *(unsigned int *)raw_data;
656 struct compat_ncp_mount_data *c_n = raw_data;
657 struct ncp_mount_data *n = raw_data;
659 n->dir_mode = c_n->dir_mode;
660 n->file_mode = c_n->file_mode;
663 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
664 n->wdog_pid = c_n->wdog_pid;
665 n->mounted_uid = c_n->mounted_uid;
666 } else if (version == 4) {
667 struct compat_ncp_mount_data_v4 *c_n = raw_data;
668 struct ncp_mount_data_v4 *n = raw_data;
670 n->dir_mode = c_n->dir_mode;
671 n->file_mode = c_n->file_mode;
674 n->retry_count = c_n->retry_count;
675 n->time_out = c_n->time_out;
676 n->ncp_fd = c_n->ncp_fd;
677 n->wdog_pid = c_n->wdog_pid;
678 n->mounted_uid = c_n->mounted_uid;
679 n->flags = c_n->flags;
680 } else if (version != 5) {
687 struct compat_smb_mount_data {
688 compat_int_t version;
689 __compat_uid_t mounted_uid;
692 compat_mode_t file_mode;
693 compat_mode_t dir_mode;
696 static void *do_smb_super_data_conv(void *raw_data)
698 struct smb_mount_data *s = raw_data;
699 struct compat_smb_mount_data *c_s = raw_data;
701 if (c_s->version != SMB_MOUNT_OLDVERSION)
703 s->dir_mode = c_s->dir_mode;
704 s->file_mode = c_s->file_mode;
707 s->mounted_uid = c_s->mounted_uid;
712 struct compat_nfs_string {
717 static inline void compat_nfs_string(struct nfs_string *dst,
718 struct compat_nfs_string *src)
720 dst->data = compat_ptr(src->data);
724 struct compat_nfs4_mount_data_v1 {
725 compat_int_t version;
730 compat_int_t retrans;
731 compat_int_t acregmin;
732 compat_int_t acregmax;
733 compat_int_t acdirmin;
734 compat_int_t acdirmax;
735 struct compat_nfs_string client_addr;
736 struct compat_nfs_string mnt_path;
737 struct compat_nfs_string hostname;
738 compat_uint_t host_addrlen;
739 compat_uptr_t host_addr;
741 compat_int_t auth_flavourlen;
742 compat_uptr_t auth_flavours;
745 static int do_nfs4_super_data_conv(void *raw_data)
747 int version = *(compat_uint_t *) raw_data;
750 struct compat_nfs4_mount_data_v1 *raw = raw_data;
751 struct nfs4_mount_data *real = raw_data;
753 /* copy the fields backwards */
754 real->auth_flavours = compat_ptr(raw->auth_flavours);
755 real->auth_flavourlen = raw->auth_flavourlen;
756 real->proto = raw->proto;
757 real->host_addr = compat_ptr(raw->host_addr);
758 real->host_addrlen = raw->host_addrlen;
759 compat_nfs_string(&real->hostname, &raw->hostname);
760 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
761 compat_nfs_string(&real->client_addr, &raw->client_addr);
762 real->acdirmax = raw->acdirmax;
763 real->acdirmin = raw->acdirmin;
764 real->acregmax = raw->acregmax;
765 real->acregmin = raw->acregmin;
766 real->retrans = raw->retrans;
767 real->timeo = raw->timeo;
768 real->wsize = raw->wsize;
769 real->rsize = raw->rsize;
770 real->flags = raw->flags;
771 real->version = raw->version;
777 #define SMBFS_NAME "smbfs"
778 #define NCPFS_NAME "ncpfs"
779 #define NFS4_NAME "nfs4"
781 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
782 char __user * type, unsigned long flags,
785 unsigned long type_page;
786 unsigned long data_page;
787 unsigned long dev_page;
791 retval = copy_mount_options (type, &type_page);
795 dir_page = getname(dir_name);
796 retval = PTR_ERR(dir_page);
797 if (IS_ERR(dir_page))
800 retval = copy_mount_options (dev_name, &dev_page);
804 retval = copy_mount_options (data, &data_page);
810 if (type_page && data_page) {
811 if (!strcmp((char *)type_page, SMBFS_NAME)) {
812 do_smb_super_data_conv((void *)data_page);
813 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
814 do_ncp_super_data_conv((void *)data_page);
815 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
816 if (do_nfs4_super_data_conv((void *) data_page))
822 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
823 flags, (void*)data_page);
827 free_page(data_page);
833 free_page(type_page);
838 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
840 struct compat_old_linux_dirent {
841 compat_ulong_t d_ino;
842 compat_ulong_t d_offset;
843 unsigned short d_namlen;
847 struct compat_readdir_callback {
848 struct compat_old_linux_dirent __user *dirent;
852 static int compat_fillonedir(void *__buf, const char *name, int namlen,
853 loff_t offset, u64 ino, unsigned int d_type)
855 struct compat_readdir_callback *buf = __buf;
856 struct compat_old_linux_dirent __user *dirent;
857 compat_ulong_t d_ino;
862 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
863 buf->result = -EOVERFLOW;
867 dirent = buf->dirent;
868 if (!access_ok(VERIFY_WRITE, dirent,
869 (unsigned long)(dirent->d_name + namlen + 1) -
870 (unsigned long)dirent))
872 if ( __put_user(d_ino, &dirent->d_ino) ||
873 __put_user(offset, &dirent->d_offset) ||
874 __put_user(namlen, &dirent->d_namlen) ||
875 __copy_to_user(dirent->d_name, name, namlen) ||
876 __put_user(0, dirent->d_name + namlen))
880 buf->result = -EFAULT;
884 asmlinkage long compat_sys_old_readdir(unsigned int fd,
885 struct compat_old_linux_dirent __user *dirent, unsigned int count)
889 struct compat_readdir_callback buf;
899 error = vfs_readdir(file, compat_fillonedir, &buf);
908 struct compat_linux_dirent {
909 compat_ulong_t d_ino;
910 compat_ulong_t d_off;
911 unsigned short d_reclen;
915 struct compat_getdents_callback {
916 struct compat_linux_dirent __user *current_dir;
917 struct compat_linux_dirent __user *previous;
922 static int compat_filldir(void *__buf, const char *name, int namlen,
923 loff_t offset, u64 ino, unsigned int d_type)
925 struct compat_linux_dirent __user * dirent;
926 struct compat_getdents_callback *buf = __buf;
927 compat_ulong_t d_ino;
928 int reclen = ALIGN(NAME_OFFSET(dirent) + namlen + 2, sizeof(compat_long_t));
930 buf->error = -EINVAL; /* only used if we fail.. */
931 if (reclen > buf->count)
934 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
935 buf->error = -EOVERFLOW;
938 dirent = buf->previous;
940 if (__put_user(offset, &dirent->d_off))
943 dirent = buf->current_dir;
944 if (__put_user(d_ino, &dirent->d_ino))
946 if (__put_user(reclen, &dirent->d_reclen))
948 if (copy_to_user(dirent->d_name, name, namlen))
950 if (__put_user(0, dirent->d_name + namlen))
952 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
954 buf->previous = dirent;
955 dirent = (void __user *)dirent + reclen;
956 buf->current_dir = dirent;
957 buf->count -= reclen;
960 buf->error = -EFAULT;
964 asmlinkage long compat_sys_getdents(unsigned int fd,
965 struct compat_linux_dirent __user *dirent, unsigned int count)
968 struct compat_linux_dirent __user * lastdirent;
969 struct compat_getdents_callback buf;
973 if (!access_ok(VERIFY_WRITE, dirent, count))
981 buf.current_dir = dirent;
986 error = vfs_readdir(file, compat_filldir, &buf);
989 lastdirent = buf.previous;
991 if (put_user(file->f_pos, &lastdirent->d_off))
994 error = count - buf.count;
1001 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1003 struct compat_getdents_callback64 {
1004 struct linux_dirent64 __user *current_dir;
1005 struct linux_dirent64 __user *previous;
1010 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1011 u64 ino, unsigned int d_type)
1013 struct linux_dirent64 __user *dirent;
1014 struct compat_getdents_callback64 *buf = __buf;
1015 int jj = NAME_OFFSET(dirent);
1016 int reclen = ALIGN(jj + namlen + 1, sizeof(u64));
1019 buf->error = -EINVAL; /* only used if we fail.. */
1020 if (reclen > buf->count)
1022 dirent = buf->previous;
1025 if (__put_user_unaligned(offset, &dirent->d_off))
1028 dirent = buf->current_dir;
1029 if (__put_user_unaligned(ino, &dirent->d_ino))
1032 if (__put_user_unaligned(off, &dirent->d_off))
1034 if (__put_user(reclen, &dirent->d_reclen))
1036 if (__put_user(d_type, &dirent->d_type))
1038 if (copy_to_user(dirent->d_name, name, namlen))
1040 if (__put_user(0, dirent->d_name + namlen))
1042 buf->previous = dirent;
1043 dirent = (void __user *)dirent + reclen;
1044 buf->current_dir = dirent;
1045 buf->count -= reclen;
1048 buf->error = -EFAULT;
1052 asmlinkage long compat_sys_getdents64(unsigned int fd,
1053 struct linux_dirent64 __user * dirent, unsigned int count)
1056 struct linux_dirent64 __user * lastdirent;
1057 struct compat_getdents_callback64 buf;
1061 if (!access_ok(VERIFY_WRITE, dirent, count))
1069 buf.current_dir = dirent;
1070 buf.previous = NULL;
1074 error = vfs_readdir(file, compat_filldir64, &buf);
1077 lastdirent = buf.previous;
1079 typeof(lastdirent->d_off) d_off = file->f_pos;
1080 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1083 error = count - buf.count;
1089 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1091 static ssize_t compat_do_readv_writev(int type, struct file *file,
1092 const struct compat_iovec __user *uvector,
1093 unsigned long nr_segs, loff_t *pos)
1095 compat_ssize_t tot_len;
1096 struct iovec iovstack[UIO_FASTIOV];
1097 struct iovec *iov=iovstack, *vector;
1104 * SuS says "The readv() function *may* fail if the iovcnt argument
1105 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1106 * traditionally returned zero for zero segments, so...
1113 * First get the "struct iovec" from user memory and
1114 * verify all the pointers
1117 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1121 if (nr_segs > UIO_FASTIOV) {
1123 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1128 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1132 * Single unix specification:
1133 * We should -EINVAL if an element length is not >= 0 and fitting an
1134 * ssize_t. The total length is fitting an ssize_t
1136 * Be careful here because iov_len is a size_t not an ssize_t
1141 for (seg = 0 ; seg < nr_segs; seg++) {
1142 compat_ssize_t tmp = tot_len;
1146 if (__get_user(len, &uvector->iov_len) ||
1147 __get_user(buf, &uvector->iov_base)) {
1151 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1154 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1156 vector->iov_base = compat_ptr(buf);
1157 vector->iov_len = (compat_size_t) len;
1166 ret = rw_verify_area(type, file, pos, tot_len);
1172 fn = file->f_op->read;
1173 fnv = file->f_op->aio_read;
1175 fn = (io_fn_t)file->f_op->write;
1176 fnv = file->f_op->aio_write;
1180 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1183 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1186 if (iov != iovstack)
1188 if ((ret + (type == READ)) > 0) {
1189 struct dentry *dentry = file->f_path.dentry;
1191 fsnotify_access(dentry);
1193 fsnotify_modify(dentry);
1198 static size_t compat_readv(struct file *file,
1199 const struct compat_iovec __user *vec,
1200 unsigned long vlen, loff_t *pos)
1202 ssize_t ret = -EBADF;
1204 if (!(file->f_mode & FMODE_READ))
1208 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1211 ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
1215 add_rchar(current, ret);
1221 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
1230 ret = compat_readv(file, vec, vlen, &file->f_pos);
1235 static size_t compat_writev(struct file *file,
1236 const struct compat_iovec __user *vec,
1237 unsigned long vlen, loff_t *pos)
1239 ssize_t ret = -EBADF;
1241 if (!(file->f_mode & FMODE_WRITE))
1245 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1248 ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
1252 add_wchar(current, ret);
1258 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
1267 ret = compat_writev(file, vec, vlen, &file->f_pos);
1273 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1274 unsigned int nr_segs, unsigned int flags)
1277 struct iovec __user *iov;
1278 if (nr_segs > UIO_MAXIOV)
1280 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1281 for (i = 0; i < nr_segs; i++) {
1282 struct compat_iovec v;
1283 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1284 get_user(v.iov_len, &iov32[i].iov_len) ||
1285 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1286 put_user(v.iov_len, &iov[i].iov_len))
1289 return sys_vmsplice(fd, iov, nr_segs, flags);
1293 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1297 compat_sys_open(const char __user *filename, int flags, int mode)
1299 return do_sys_open(AT_FDCWD, filename, flags, mode);
1303 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1307 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1309 return do_sys_open(dfd, filename, flags, mode);
1313 * compat_count() counts the number of arguments/envelopes. It is basically
1314 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1315 * and envp pointers.
1317 static int compat_count(compat_uptr_t __user *argv, int max)
1325 if (get_user(p, argv))
1338 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1339 * except that it works with 32 bit argv and envp pointers.
1341 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1342 struct linux_binprm *bprm)
1344 struct page *kmapped_page = NULL;
1346 unsigned long kpos = 0;
1349 while (argc-- > 0) {
1354 if (get_user(str, argv+argc) ||
1355 !(len = strnlen_user(compat_ptr(str), MAX_ARG_STRLEN))) {
1360 if (len > MAX_ARG_STRLEN) {
1365 /* We're going to work our way backwords. */
1371 int offset, bytes_to_copy;
1373 offset = pos % PAGE_SIZE;
1377 bytes_to_copy = offset;
1378 if (bytes_to_copy > len)
1379 bytes_to_copy = len;
1381 offset -= bytes_to_copy;
1382 pos -= bytes_to_copy;
1383 str -= bytes_to_copy;
1384 len -= bytes_to_copy;
1386 if (!kmapped_page || kpos != (pos & PAGE_MASK)) {
1389 #ifdef CONFIG_STACK_GROWSUP
1390 ret = expand_stack_downwards(bprm->vma, pos);
1392 /* We've exceed the stack rlimit. */
1397 ret = get_user_pages(current, bprm->mm, pos,
1398 1, 1, 1, &page, NULL);
1400 /* We've exceed the stack rlimit. */
1406 flush_kernel_dcache_page(kmapped_page);
1407 kunmap(kmapped_page);
1408 put_page(kmapped_page);
1410 kmapped_page = page;
1411 kaddr = kmap(kmapped_page);
1412 kpos = pos & PAGE_MASK;
1413 flush_cache_page(bprm->vma, kpos,
1414 page_to_pfn(kmapped_page));
1416 if (copy_from_user(kaddr+offset, compat_ptr(str),
1426 flush_kernel_dcache_page(kmapped_page);
1427 kunmap(kmapped_page);
1428 put_page(kmapped_page);
1434 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1435 * that it processes 32 bit argv and envp pointers.
1437 int compat_do_execve(char * filename,
1438 compat_uptr_t __user *argv,
1439 compat_uptr_t __user *envp,
1440 struct pt_regs * regs)
1442 struct linux_binprm *bprm;
1444 struct files_struct *displaced;
1447 retval = unshare_files(&displaced);
1452 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1456 retval = mutex_lock_interruptible(¤t->cred_exec_mutex);
1459 current->in_execve = 1;
1462 bprm->cred = prepare_exec_creds();
1465 check_unsafe_exec(bprm);
1467 file = open_exec(filename);
1468 retval = PTR_ERR(file);
1475 bprm->filename = filename;
1476 bprm->interp = filename;
1478 retval = bprm_mm_init(bprm);
1482 bprm->argc = compat_count(argv, MAX_ARG_STRINGS);
1483 if ((retval = bprm->argc) < 0)
1486 bprm->envc = compat_count(envp, MAX_ARG_STRINGS);
1487 if ((retval = bprm->envc) < 0)
1490 retval = prepare_binprm(bprm);
1494 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1498 bprm->exec = bprm->p;
1499 retval = compat_copy_strings(bprm->envc, envp, bprm);
1503 retval = compat_copy_strings(bprm->argc, argv, bprm);
1507 retval = search_binary_handler(bprm, regs);
1511 /* execve succeeded */
1512 current->in_execve = 0;
1513 mutex_unlock(¤t->cred_exec_mutex);
1514 acct_update_integrals(current);
1517 put_files_struct(displaced);
1526 allow_write_access(bprm->file);
1531 current->in_execve = 0;
1532 mutex_unlock(¤t->cred_exec_mutex);
1539 reset_files_struct(displaced);
1544 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1546 static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
1547 int timeval, int ret)
1554 if (current->personality & STICKY_TIMEOUTS)
1557 /* No update for zero timeout */
1558 if (!end_time->tv_sec && !end_time->tv_nsec)
1562 ts = timespec_sub(*end_time, ts);
1564 ts.tv_sec = ts.tv_nsec = 0;
1567 struct compat_timeval rtv;
1569 rtv.tv_sec = ts.tv_sec;
1570 rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
1572 if (!copy_to_user(p, &rtv, sizeof(rtv)))
1575 struct compat_timespec rts;
1577 rts.tv_sec = ts.tv_sec;
1578 rts.tv_nsec = ts.tv_nsec;
1580 if (!copy_to_user(p, &rts, sizeof(rts)))
1584 * If an application puts its timeval in read-only memory, we
1585 * don't want the Linux-specific update to the timeval to
1586 * cause a fault after the select has completed
1587 * successfully. However, because we're not updating the
1588 * timeval, we can't restart the system call.
1592 if (ret == -ERESTARTNOHAND)
1598 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1599 * 64-bit unsigned longs.
1602 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1603 unsigned long *fdset)
1605 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1609 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1616 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1619 *fdset++ = h << 32 | l;
1622 if (odd && __get_user(*fdset, ufdset))
1625 /* Tricky, must clear full unsigned long in the
1626 * kernel fdset at the end, this makes sure that
1629 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1635 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1636 unsigned long *fdset)
1639 nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
1650 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1655 if (odd && __put_user(*fdset, ufdset))
1662 * This is a virtual copy of sys_select from fs/select.c and probably
1663 * should be compared to it from time to time
1667 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1668 * like to be certain this leads to no problems. So I return
1669 * EINTR just for safety.
1671 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1672 * I'm trying ERESTARTNOHAND which restart only when you want to.
1674 #define MAX_SELECT_SECONDS \
1675 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1677 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1678 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1679 struct timespec *end_time)
1683 int size, max_fds, ret = -EINVAL;
1684 struct fdtable *fdt;
1685 long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
1690 /* max_fds can increase, so grab it once to avoid race */
1692 fdt = files_fdtable(current->files);
1693 max_fds = fdt->max_fds;
1699 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1700 * since we used fdset we need to allocate memory in units of
1703 size = FDS_BYTES(n);
1705 if (size > sizeof(stack_fds) / 6) {
1706 bits = kmalloc(6 * size, GFP_KERNEL);
1711 fds.in = (unsigned long *) bits;
1712 fds.out = (unsigned long *) (bits + size);
1713 fds.ex = (unsigned long *) (bits + 2*size);
1714 fds.res_in = (unsigned long *) (bits + 3*size);
1715 fds.res_out = (unsigned long *) (bits + 4*size);
1716 fds.res_ex = (unsigned long *) (bits + 5*size);
1718 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1719 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1720 (ret = compat_get_fd_set(n, exp, fds.ex)))
1722 zero_fd_set(n, fds.res_in);
1723 zero_fd_set(n, fds.res_out);
1724 zero_fd_set(n, fds.res_ex);
1726 ret = do_select(n, &fds, end_time);
1731 ret = -ERESTARTNOHAND;
1732 if (signal_pending(current))
1737 if (compat_set_fd_set(n, inp, fds.res_in) ||
1738 compat_set_fd_set(n, outp, fds.res_out) ||
1739 compat_set_fd_set(n, exp, fds.res_ex))
1742 if (bits != stack_fds)
1748 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1749 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1750 struct compat_timeval __user *tvp)
1752 struct timespec end_time, *to = NULL;
1753 struct compat_timeval tv;
1757 if (copy_from_user(&tv, tvp, sizeof(tv)))
1761 if (poll_select_set_timeout(to,
1762 tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
1763 (tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
1767 ret = compat_core_sys_select(n, inp, outp, exp, to);
1768 ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
1773 #ifdef HAVE_SET_RESTORE_SIGMASK
1774 static long do_compat_pselect(int n, compat_ulong_t __user *inp,
1775 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1776 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1777 compat_size_t sigsetsize)
1779 compat_sigset_t ss32;
1780 sigset_t ksigmask, sigsaved;
1781 struct compat_timespec ts;
1782 struct timespec end_time, *to = NULL;
1786 if (copy_from_user(&ts, tsp, sizeof(ts)))
1790 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1795 if (sigsetsize != sizeof(compat_sigset_t))
1797 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1799 sigset_from_compat(&ksigmask, &ss32);
1801 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1802 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1805 ret = compat_core_sys_select(n, inp, outp, exp, to);
1806 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1808 if (ret == -ERESTARTNOHAND) {
1810 * Don't restore the signal mask yet. Let do_signal() deliver
1811 * the signal on the way back to userspace, before the signal
1815 memcpy(¤t->saved_sigmask, &sigsaved,
1817 set_restore_sigmask();
1820 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1825 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1826 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1827 struct compat_timespec __user *tsp, void __user *sig)
1829 compat_size_t sigsetsize = 0;
1830 compat_uptr_t up = 0;
1833 if (!access_ok(VERIFY_READ, sig,
1834 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1835 __get_user(up, (compat_uptr_t __user *)sig) ||
1836 __get_user(sigsetsize,
1837 (compat_size_t __user *)(sig+sizeof(up))))
1840 return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
1844 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1845 unsigned int nfds, struct compat_timespec __user *tsp,
1846 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1848 compat_sigset_t ss32;
1849 sigset_t ksigmask, sigsaved;
1850 struct compat_timespec ts;
1851 struct timespec end_time, *to = NULL;
1855 if (copy_from_user(&ts, tsp, sizeof(ts)))
1859 if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
1864 if (sigsetsize != sizeof(compat_sigset_t))
1866 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1868 sigset_from_compat(&ksigmask, &ss32);
1870 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1871 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1874 ret = do_sys_poll(ufds, nfds, to);
1876 /* We can restart this syscall, usually */
1877 if (ret == -EINTR) {
1879 * Don't restore the signal mask yet. Let do_signal() deliver
1880 * the signal on the way back to userspace, before the signal
1884 memcpy(¤t->saved_sigmask, &sigsaved,
1886 set_restore_sigmask();
1888 ret = -ERESTARTNOHAND;
1890 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1892 ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
1896 #endif /* HAVE_SET_RESTORE_SIGMASK */
1898 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1899 /* Stuff for NFS server syscalls... */
1900 struct compat_nfsctl_svc {
1905 struct compat_nfsctl_client {
1906 s8 cl32_ident[NFSCLNT_IDMAX+1];
1908 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1911 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1914 struct compat_nfsctl_export {
1915 char ex32_client[NFSCLNT_IDMAX+1];
1916 char ex32_path[NFS_MAXPATHLEN+1];
1917 compat_dev_t ex32_dev;
1918 compat_ino_t ex32_ino;
1919 compat_int_t ex32_flags;
1920 __compat_uid_t ex32_anon_uid;
1921 __compat_gid_t ex32_anon_gid;
1924 struct compat_nfsctl_fdparm {
1925 struct sockaddr gd32_addr;
1926 s8 gd32_path[NFS_MAXPATHLEN+1];
1927 compat_int_t gd32_version;
1930 struct compat_nfsctl_fsparm {
1931 struct sockaddr gd32_addr;
1932 s8 gd32_path[NFS_MAXPATHLEN+1];
1933 compat_int_t gd32_maxlen;
1936 struct compat_nfsctl_arg {
1937 compat_int_t ca32_version; /* safeguard */
1939 struct compat_nfsctl_svc u32_svc;
1940 struct compat_nfsctl_client u32_client;
1941 struct compat_nfsctl_export u32_export;
1942 struct compat_nfsctl_fdparm u32_getfd;
1943 struct compat_nfsctl_fsparm u32_getfs;
1945 #define ca32_svc u.u32_svc
1946 #define ca32_client u.u32_client
1947 #define ca32_export u.u32_export
1948 #define ca32_getfd u.u32_getfd
1949 #define ca32_getfs u.u32_getfs
1952 union compat_nfsctl_res {
1953 __u8 cr32_getfh[NFS_FHSIZE];
1954 struct knfsd_fh cr32_getfs;
1957 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
1958 struct compat_nfsctl_arg __user *arg)
1960 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
1961 get_user(karg->ca_version, &arg->ca32_version) ||
1962 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
1963 __get_user(karg->ca_svc.svc_nthreads,
1964 &arg->ca32_svc.svc32_nthreads))
1969 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
1970 struct compat_nfsctl_arg __user *arg)
1972 if (!access_ok(VERIFY_READ, &arg->ca32_client,
1973 sizeof(arg->ca32_client)) ||
1974 get_user(karg->ca_version, &arg->ca32_version) ||
1975 __copy_from_user(&karg->ca_client.cl_ident[0],
1976 &arg->ca32_client.cl32_ident[0],
1978 __get_user(karg->ca_client.cl_naddr,
1979 &arg->ca32_client.cl32_naddr) ||
1980 __copy_from_user(&karg->ca_client.cl_addrlist[0],
1981 &arg->ca32_client.cl32_addrlist[0],
1982 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
1983 __get_user(karg->ca_client.cl_fhkeytype,
1984 &arg->ca32_client.cl32_fhkeytype) ||
1985 __get_user(karg->ca_client.cl_fhkeylen,
1986 &arg->ca32_client.cl32_fhkeylen) ||
1987 __copy_from_user(&karg->ca_client.cl_fhkey[0],
1988 &arg->ca32_client.cl32_fhkey[0],
1995 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
1996 struct compat_nfsctl_arg __user *arg)
1998 if (!access_ok(VERIFY_READ, &arg->ca32_export,
1999 sizeof(arg->ca32_export)) ||
2000 get_user(karg->ca_version, &arg->ca32_version) ||
2001 __copy_from_user(&karg->ca_export.ex_client[0],
2002 &arg->ca32_export.ex32_client[0],
2004 __copy_from_user(&karg->ca_export.ex_path[0],
2005 &arg->ca32_export.ex32_path[0],
2007 __get_user(karg->ca_export.ex_dev,
2008 &arg->ca32_export.ex32_dev) ||
2009 __get_user(karg->ca_export.ex_ino,
2010 &arg->ca32_export.ex32_ino) ||
2011 __get_user(karg->ca_export.ex_flags,
2012 &arg->ca32_export.ex32_flags) ||
2013 __get_user(karg->ca_export.ex_anon_uid,
2014 &arg->ca32_export.ex32_anon_uid) ||
2015 __get_user(karg->ca_export.ex_anon_gid,
2016 &arg->ca32_export.ex32_anon_gid))
2018 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2019 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2024 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2025 struct compat_nfsctl_arg __user *arg)
2027 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2028 sizeof(arg->ca32_getfd)) ||
2029 get_user(karg->ca_version, &arg->ca32_version) ||
2030 __copy_from_user(&karg->ca_getfd.gd_addr,
2031 &arg->ca32_getfd.gd32_addr,
2032 (sizeof(struct sockaddr))) ||
2033 __copy_from_user(&karg->ca_getfd.gd_path,
2034 &arg->ca32_getfd.gd32_path,
2035 (NFS_MAXPATHLEN+1)) ||
2036 __get_user(karg->ca_getfd.gd_version,
2037 &arg->ca32_getfd.gd32_version))
2043 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2044 struct compat_nfsctl_arg __user *arg)
2046 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2047 get_user(karg->ca_version, &arg->ca32_version) ||
2048 __copy_from_user(&karg->ca_getfs.gd_addr,
2049 &arg->ca32_getfs.gd32_addr,
2050 (sizeof(struct sockaddr))) ||
2051 __copy_from_user(&karg->ca_getfs.gd_path,
2052 &arg->ca32_getfs.gd32_path,
2053 (NFS_MAXPATHLEN+1)) ||
2054 __get_user(karg->ca_getfs.gd_maxlen,
2055 &arg->ca32_getfs.gd32_maxlen))
2061 /* This really doesn't need translations, we are only passing
2062 * back a union which contains opaque nfs file handle data.
2064 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2065 union compat_nfsctl_res __user *res)
2069 err = copy_to_user(res, kres, sizeof(*res));
2071 return (err) ? -EFAULT : 0;
2074 asmlinkage long compat_sys_nfsservctl(int cmd,
2075 struct compat_nfsctl_arg __user *arg,
2076 union compat_nfsctl_res __user *res)
2078 struct nfsctl_arg *karg;
2079 union nfsctl_res *kres;
2083 karg = kmalloc(sizeof(*karg), GFP_USER);
2084 kres = kmalloc(sizeof(*kres), GFP_USER);
2085 if(!karg || !kres) {
2092 err = compat_nfs_svc_trans(karg, arg);
2095 case NFSCTL_ADDCLIENT:
2096 err = compat_nfs_clnt_trans(karg, arg);
2099 case NFSCTL_DELCLIENT:
2100 err = compat_nfs_clnt_trans(karg, arg);
2104 case NFSCTL_UNEXPORT:
2105 err = compat_nfs_exp_trans(karg, arg);
2109 err = compat_nfs_getfd_trans(karg, arg);
2113 err = compat_nfs_getfs_trans(karg, arg);
2126 /* The __user pointer casts are valid because of the set_fs() */
2127 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2133 if((cmd == NFSCTL_GETFD) ||
2134 (cmd == NFSCTL_GETFS))
2135 err = compat_nfs_getfh_res_trans(kres, res);
2143 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2145 return sys_ni_syscall();
2151 #ifdef HAVE_SET_RESTORE_SIGMASK
2152 asmlinkage long compat_sys_epoll_pwait(int epfd,
2153 struct compat_epoll_event __user *events,
2154 int maxevents, int timeout,
2155 const compat_sigset_t __user *sigmask,
2156 compat_size_t sigsetsize)
2159 compat_sigset_t csigmask;
2160 sigset_t ksigmask, sigsaved;
2163 * If the caller wants a certain signal mask to be set during the wait,
2167 if (sigsetsize != sizeof(compat_sigset_t))
2169 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2171 sigset_from_compat(&ksigmask, &csigmask);
2172 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2173 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2176 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2179 * If we changed the signal mask, we need to restore the original one.
2180 * In case we've got a signal while waiting, we do not restore the
2181 * signal mask yet, and we allow do_signal() to deliver the signal on
2182 * the way back to userspace, before the signal mask is restored.
2185 if (err == -EINTR) {
2186 memcpy(¤t->saved_sigmask, &sigsaved,
2188 set_restore_sigmask();
2190 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2195 #endif /* HAVE_SET_RESTORE_SIGMASK */
2197 #endif /* CONFIG_EPOLL */
2199 #ifdef CONFIG_SIGNALFD
2201 asmlinkage long compat_sys_signalfd4(int ufd,
2202 const compat_sigset_t __user *sigmask,
2203 compat_size_t sigsetsize, int flags)
2205 compat_sigset_t ss32;
2207 sigset_t __user *ksigmask;
2209 if (sigsetsize != sizeof(compat_sigset_t))
2211 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
2213 sigset_from_compat(&tmp, &ss32);
2214 ksigmask = compat_alloc_user_space(sizeof(sigset_t));
2215 if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
2218 return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
2221 asmlinkage long compat_sys_signalfd(int ufd,
2222 const compat_sigset_t __user *sigmask,
2223 compat_size_t sigsetsize)
2225 return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
2227 #endif /* CONFIG_SIGNALFD */
2229 #ifdef CONFIG_TIMERFD
2231 asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
2232 const struct compat_itimerspec __user *utmr,
2233 struct compat_itimerspec __user *otmr)
2236 struct itimerspec t;
2237 struct itimerspec __user *ut;
2239 if (get_compat_itimerspec(&t, utmr))
2241 ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
2242 if (copy_to_user(&ut[0], &t, sizeof(t)))
2244 error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
2246 error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
2247 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2252 asmlinkage long compat_sys_timerfd_gettime(int ufd,
2253 struct compat_itimerspec __user *otmr)
2256 struct itimerspec t;
2257 struct itimerspec __user *ut;
2259 ut = compat_alloc_user_space(sizeof(struct itimerspec));
2260 error = sys_timerfd_gettime(ufd, ut);
2262 error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
2263 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
2268 #endif /* CONFIG_TIMERFD */