4 * Kernel compatibililty routines for e.g. 32 bit syscall support
7 * Copyright (C) 2002 Stephen Rothwell, IBM Corporation
8 * Copyright (C) 1997-2000 Jakub Jelinek (jakub@redhat.com)
9 * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be)
10 * Copyright (C) 2001,2002 Andi Kleen, SuSE Labs
11 * Copyright (C) 2003 Pavel Machek (pavel@suse.cz)
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
18 #include <linux/linkage.h>
19 #include <linux/compat.h>
20 #include <linux/errno.h>
21 #include <linux/time.h>
23 #include <linux/fcntl.h>
24 #include <linux/namei.h>
25 #include <linux/file.h>
26 #include <linux/vfs.h>
27 #include <linux/ioctl32.h>
28 #include <linux/ioctl.h>
29 #include <linux/init.h>
30 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
31 #include <linux/smb.h>
32 #include <linux/smb_mount.h>
33 #include <linux/ncp_mount.h>
34 #include <linux/nfs4_mount.h>
35 #include <linux/smp_lock.h>
36 #include <linux/syscalls.h>
37 #include <linux/ctype.h>
38 #include <linux/module.h>
39 #include <linux/dirent.h>
40 #include <linux/fsnotify.h>
41 #include <linux/highuid.h>
42 #include <linux/sunrpc/svc.h>
43 #include <linux/nfsd/nfsd.h>
44 #include <linux/nfsd/syscall.h>
45 #include <linux/personality.h>
46 #include <linux/rwsem.h>
47 #include <linux/tsacct_kern.h>
48 #include <linux/highmem.h>
49 #include <linux/poll.h>
51 #include <linux/eventpoll.h>
53 #include <net/sock.h> /* siocdevprivate_ioctl */
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)
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);
94 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
99 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
100 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
101 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
102 get_user(tv[1].tv_usec, &t[1].tv_usec))
105 return do_utimes(dfd, filename, t ? tv : NULL);
108 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
110 return compat_sys_futimesat(AT_FDCWD, filename, t);
113 asmlinkage long compat_sys_newstat(char __user * filename,
114 struct compat_stat __user *statbuf)
117 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
120 error = cp_compat_stat(&stat, statbuf);
124 asmlinkage long compat_sys_newlstat(char __user * filename,
125 struct compat_stat __user *statbuf)
128 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
131 error = cp_compat_stat(&stat, statbuf);
135 #ifndef __ARCH_WANT_STAT64
136 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
137 struct compat_stat __user *statbuf, int flag)
142 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
145 if (flag & AT_SYMLINK_NOFOLLOW)
146 error = vfs_lstat_fd(dfd, filename, &stat);
148 error = vfs_stat_fd(dfd, filename, &stat);
151 error = cp_compat_stat(&stat, statbuf);
158 asmlinkage long compat_sys_newfstat(unsigned int fd,
159 struct compat_stat __user * statbuf)
162 int error = vfs_fstat(fd, &stat);
165 error = cp_compat_stat(&stat, statbuf);
169 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
172 if (sizeof ubuf->f_blocks == 4) {
173 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
174 0xffffffff00000000ULL)
176 /* f_files and f_ffree may be -1; it's okay
177 * to stuff that into 32 bits */
178 if (kbuf->f_files != 0xffffffffffffffffULL
179 && (kbuf->f_files & 0xffffffff00000000ULL))
181 if (kbuf->f_ffree != 0xffffffffffffffffULL
182 && (kbuf->f_ffree & 0xffffffff00000000ULL))
185 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
186 __put_user(kbuf->f_type, &ubuf->f_type) ||
187 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
188 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
189 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
190 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
191 __put_user(kbuf->f_files, &ubuf->f_files) ||
192 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
193 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
194 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
195 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
196 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
197 __put_user(0, &ubuf->f_spare[0]) ||
198 __put_user(0, &ubuf->f_spare[1]) ||
199 __put_user(0, &ubuf->f_spare[2]) ||
200 __put_user(0, &ubuf->f_spare[3]) ||
201 __put_user(0, &ubuf->f_spare[4]))
207 * The following statfs calls are copies of code from fs/open.c and
208 * should be checked against those from time to time
210 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
215 error = user_path_walk(path, &nd);
218 error = vfs_statfs(nd.dentry, &tmp);
220 error = put_compat_statfs(buf, &tmp);
226 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
236 error = vfs_statfs(file->f_path.dentry, &tmp);
238 error = put_compat_statfs(buf, &tmp);
244 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
246 if (sizeof ubuf->f_blocks == 4) {
247 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
248 0xffffffff00000000ULL)
250 /* f_files and f_ffree may be -1; it's okay
251 * to stuff that into 32 bits */
252 if (kbuf->f_files != 0xffffffffffffffffULL
253 && (kbuf->f_files & 0xffffffff00000000ULL))
255 if (kbuf->f_ffree != 0xffffffffffffffffULL
256 && (kbuf->f_ffree & 0xffffffff00000000ULL))
259 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
260 __put_user(kbuf->f_type, &ubuf->f_type) ||
261 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
262 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
263 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
264 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
265 __put_user(kbuf->f_files, &ubuf->f_files) ||
266 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
267 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
268 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
269 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
270 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
275 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
280 if (sz != sizeof(*buf))
283 error = user_path_walk(path, &nd);
286 error = vfs_statfs(nd.dentry, &tmp);
288 error = put_compat_statfs64(buf, &tmp);
294 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
300 if (sz != sizeof(*buf))
307 error = vfs_statfs(file->f_path.dentry, &tmp);
309 error = put_compat_statfs64(buf, &tmp);
315 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
317 #define IOCTL_HASHSIZE 256
318 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
320 static inline unsigned long ioctl32_hash(unsigned long cmd)
322 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
325 static void ioctl32_insert_translation(struct ioctl_trans *trans)
328 struct ioctl_trans *t;
330 hash = ioctl32_hash (trans->cmd);
331 if (!ioctl32_hash_table[hash])
332 ioctl32_hash_table[hash] = trans;
334 t = ioctl32_hash_table[hash];
342 static int __init init_sys32_ioctl(void)
346 for (i = 0; i < ioctl_table_size; i++) {
347 if (ioctl_start[i].next != 0) {
348 printk("ioctl translation %d bad\n",i);
352 ioctl32_insert_translation(&ioctl_start[i]);
357 __initcall(init_sys32_ioctl);
359 static void compat_ioctl_error(struct file *filp, unsigned int fd,
360 unsigned int cmd, unsigned long arg)
366 /* find the name of the device. */
367 path = (char *)__get_free_page(GFP_KERNEL);
369 fn = d_path(filp->f_path.dentry, filp->f_path.mnt, path, PAGE_SIZE);
374 sprintf(buf,"'%c'", (cmd>>_IOC_TYPESHIFT) & _IOC_TYPEMASK);
375 if (!isprint(buf[1]))
376 sprintf(buf, "%02x", buf[1]);
377 compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
378 "cmd(%08x){t:%s;sz:%u} arg(%08x) on %s\n",
379 current->comm, current->pid,
380 (int)fd, (unsigned int)cmd, buf,
381 (cmd >> _IOC_SIZESHIFT) & _IOC_SIZEMASK,
382 (unsigned int)arg, fn);
385 free_page((unsigned long)path);
388 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
393 struct ioctl_trans *t;
396 filp = fget_light(fd, &fput_needed);
400 /* RED-PEN how should LSM module know it's handling 32bit? */
401 error = security_file_ioctl(filp, cmd, arg);
406 * To allow the compat_ioctl handlers to be self contained
407 * we need to check the common ioctls here first.
408 * Just handle them with the standard handlers below.
421 if (S_ISREG(filp->f_path.dentry->d_inode->i_mode))
426 if (filp->f_op && filp->f_op->compat_ioctl) {
427 error = filp->f_op->compat_ioctl(filp, cmd, arg);
428 if (error != -ENOIOCTLCMD)
433 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
438 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
443 if (S_ISSOCK(filp->f_path.dentry->d_inode->i_mode) &&
444 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
445 error = siocdevprivate_ioctl(fd, cmd, arg);
450 compat_ioctl_error(filp, fd, cmd, arg);
459 error = t->handler(fd, cmd, arg, filp);
465 error = vfs_ioctl(filp, fd, cmd, arg);
467 fput_light(filp, fput_needed);
472 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
474 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
475 __get_user(kfl->l_type, &ufl->l_type) ||
476 __get_user(kfl->l_whence, &ufl->l_whence) ||
477 __get_user(kfl->l_start, &ufl->l_start) ||
478 __get_user(kfl->l_len, &ufl->l_len) ||
479 __get_user(kfl->l_pid, &ufl->l_pid))
484 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
486 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
487 __put_user(kfl->l_type, &ufl->l_type) ||
488 __put_user(kfl->l_whence, &ufl->l_whence) ||
489 __put_user(kfl->l_start, &ufl->l_start) ||
490 __put_user(kfl->l_len, &ufl->l_len) ||
491 __put_user(kfl->l_pid, &ufl->l_pid))
496 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
497 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
499 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
500 __get_user(kfl->l_type, &ufl->l_type) ||
501 __get_user(kfl->l_whence, &ufl->l_whence) ||
502 __get_user(kfl->l_start, &ufl->l_start) ||
503 __get_user(kfl->l_len, &ufl->l_len) ||
504 __get_user(kfl->l_pid, &ufl->l_pid))
510 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
511 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
513 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
514 __put_user(kfl->l_type, &ufl->l_type) ||
515 __put_user(kfl->l_whence, &ufl->l_whence) ||
516 __put_user(kfl->l_start, &ufl->l_start) ||
517 __put_user(kfl->l_len, &ufl->l_len) ||
518 __put_user(kfl->l_pid, &ufl->l_pid))
524 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
535 ret = get_compat_flock(&f, compat_ptr(arg));
540 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
542 if (cmd == F_GETLK && ret == 0) {
543 /* GETLK was successfule and we need to return the data...
544 * but it needs to fit in the compat structure.
545 * l_start shouldn't be too big, unless the original
546 * start + end is greater than COMPAT_OFF_T_MAX, in which
547 * case the app was asking for trouble, so we return
548 * -EOVERFLOW in that case.
549 * l_len could be too big, in which case we just truncate it,
550 * and only allow the app to see that part of the conflicting
551 * lock that might make sense to it anyway
554 if (f.l_start > COMPAT_OFF_T_MAX)
556 if (f.l_len > COMPAT_OFF_T_MAX)
557 f.l_len = COMPAT_OFF_T_MAX;
559 ret = put_compat_flock(&f, compat_ptr(arg));
566 ret = get_compat_flock64(&f, compat_ptr(arg));
571 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
572 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
575 if (cmd == F_GETLK64 && ret == 0) {
576 /* need to return lock information - see above for commentary */
577 if (f.l_start > COMPAT_LOFF_T_MAX)
579 if (f.l_len > COMPAT_LOFF_T_MAX)
580 f.l_len = COMPAT_LOFF_T_MAX;
582 ret = put_compat_flock64(&f, compat_ptr(arg));
587 ret = sys_fcntl(fd, cmd, arg);
593 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
596 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
598 return compat_sys_fcntl64(fd, cmd, arg);
602 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
607 mm_segment_t oldfs = get_fs();
608 if (unlikely(get_user(ctx64, ctx32p)))
612 /* The __user pointer cast is valid because of the set_fs() */
613 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
615 /* truncating is ok because it's a user address */
617 ret = put_user((u32) ctx64, ctx32p);
622 compat_sys_io_getevents(aio_context_t ctx_id,
623 unsigned long min_nr,
625 struct io_event __user *events,
626 struct compat_timespec __user *timeout)
630 struct timespec __user *ut = NULL;
633 if (unlikely(!access_ok(VERIFY_WRITE, events,
634 nr * sizeof(struct io_event))))
637 if (get_compat_timespec(&t, timeout))
640 ut = compat_alloc_user_space(sizeof(*ut));
641 if (copy_to_user(ut, &t, sizeof(t)) )
644 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
650 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
655 for (i = 0; i < nr; ++i) {
656 if (get_user(uptr, ptr32 + i))
658 if (put_user(compat_ptr(uptr), ptr64 + i))
664 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
667 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
669 struct iocb __user * __user *iocb64;
672 if (unlikely(nr < 0))
675 if (nr > MAX_AIO_SUBMITS)
676 nr = MAX_AIO_SUBMITS;
678 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
679 ret = copy_iocb(nr, iocb, iocb64);
681 ret = sys_io_submit(ctx_id, nr, iocb64);
685 struct compat_ncp_mount_data {
686 compat_int_t version;
687 compat_uint_t ncp_fd;
688 __compat_uid_t mounted_uid;
689 compat_pid_t wdog_pid;
690 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
691 compat_uint_t time_out;
692 compat_uint_t retry_count;
696 compat_mode_t file_mode;
697 compat_mode_t dir_mode;
700 struct compat_ncp_mount_data_v4 {
701 compat_int_t version;
702 compat_ulong_t flags;
703 compat_ulong_t mounted_uid;
704 compat_long_t wdog_pid;
705 compat_uint_t ncp_fd;
706 compat_uint_t time_out;
707 compat_uint_t retry_count;
710 compat_ulong_t file_mode;
711 compat_ulong_t dir_mode;
714 static void *do_ncp_super_data_conv(void *raw_data)
716 int version = *(unsigned int *)raw_data;
719 struct compat_ncp_mount_data *c_n = raw_data;
720 struct ncp_mount_data *n = raw_data;
722 n->dir_mode = c_n->dir_mode;
723 n->file_mode = c_n->file_mode;
726 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
727 n->wdog_pid = c_n->wdog_pid;
728 n->mounted_uid = c_n->mounted_uid;
729 } else if (version == 4) {
730 struct compat_ncp_mount_data_v4 *c_n = raw_data;
731 struct ncp_mount_data_v4 *n = raw_data;
733 n->dir_mode = c_n->dir_mode;
734 n->file_mode = c_n->file_mode;
737 n->retry_count = c_n->retry_count;
738 n->time_out = c_n->time_out;
739 n->ncp_fd = c_n->ncp_fd;
740 n->wdog_pid = c_n->wdog_pid;
741 n->mounted_uid = c_n->mounted_uid;
742 n->flags = c_n->flags;
743 } else if (version != 5) {
750 struct compat_smb_mount_data {
751 compat_int_t version;
752 __compat_uid_t mounted_uid;
755 compat_mode_t file_mode;
756 compat_mode_t dir_mode;
759 static void *do_smb_super_data_conv(void *raw_data)
761 struct smb_mount_data *s = raw_data;
762 struct compat_smb_mount_data *c_s = raw_data;
764 if (c_s->version != SMB_MOUNT_OLDVERSION)
766 s->dir_mode = c_s->dir_mode;
767 s->file_mode = c_s->file_mode;
770 s->mounted_uid = c_s->mounted_uid;
775 struct compat_nfs_string {
780 static inline void compat_nfs_string(struct nfs_string *dst,
781 struct compat_nfs_string *src)
783 dst->data = compat_ptr(src->data);
787 struct compat_nfs4_mount_data_v1 {
788 compat_int_t version;
793 compat_int_t retrans;
794 compat_int_t acregmin;
795 compat_int_t acregmax;
796 compat_int_t acdirmin;
797 compat_int_t acdirmax;
798 struct compat_nfs_string client_addr;
799 struct compat_nfs_string mnt_path;
800 struct compat_nfs_string hostname;
801 compat_uint_t host_addrlen;
802 compat_uptr_t host_addr;
804 compat_int_t auth_flavourlen;
805 compat_uptr_t auth_flavours;
808 static int do_nfs4_super_data_conv(void *raw_data)
810 int version = *(compat_uint_t *) raw_data;
813 struct compat_nfs4_mount_data_v1 *raw = raw_data;
814 struct nfs4_mount_data *real = raw_data;
816 /* copy the fields backwards */
817 real->auth_flavours = compat_ptr(raw->auth_flavours);
818 real->auth_flavourlen = raw->auth_flavourlen;
819 real->proto = raw->proto;
820 real->host_addr = compat_ptr(raw->host_addr);
821 real->host_addrlen = raw->host_addrlen;
822 compat_nfs_string(&real->hostname, &raw->hostname);
823 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
824 compat_nfs_string(&real->client_addr, &raw->client_addr);
825 real->acdirmax = raw->acdirmax;
826 real->acdirmin = raw->acdirmin;
827 real->acregmax = raw->acregmax;
828 real->acregmin = raw->acregmin;
829 real->retrans = raw->retrans;
830 real->timeo = raw->timeo;
831 real->wsize = raw->wsize;
832 real->rsize = raw->rsize;
833 real->flags = raw->flags;
834 real->version = raw->version;
843 #define SMBFS_NAME "smbfs"
844 #define NCPFS_NAME "ncpfs"
845 #define NFS4_NAME "nfs4"
847 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
848 char __user * type, unsigned long flags,
851 unsigned long type_page;
852 unsigned long data_page;
853 unsigned long dev_page;
857 retval = copy_mount_options (type, &type_page);
861 dir_page = getname(dir_name);
862 retval = PTR_ERR(dir_page);
863 if (IS_ERR(dir_page))
866 retval = copy_mount_options (dev_name, &dev_page);
870 retval = copy_mount_options (data, &data_page);
876 if (type_page && data_page) {
877 if (!strcmp((char *)type_page, SMBFS_NAME)) {
878 do_smb_super_data_conv((void *)data_page);
879 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
880 do_ncp_super_data_conv((void *)data_page);
881 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
882 if (do_nfs4_super_data_conv((void *) data_page))
888 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
889 flags, (void*)data_page);
893 free_page(data_page);
899 free_page(type_page);
904 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
905 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
906 ~(sizeof(compat_long_t)-1))
908 struct compat_old_linux_dirent {
909 compat_ulong_t d_ino;
910 compat_ulong_t d_offset;
911 unsigned short d_namlen;
915 struct compat_readdir_callback {
916 struct compat_old_linux_dirent __user *dirent;
920 static int compat_fillonedir(void *__buf, const char *name, int namlen,
921 loff_t offset, u64 ino, unsigned int d_type)
923 struct compat_readdir_callback *buf = __buf;
924 struct compat_old_linux_dirent __user *dirent;
925 compat_ulong_t d_ino;
930 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
933 dirent = buf->dirent;
934 if (!access_ok(VERIFY_WRITE, dirent,
935 (unsigned long)(dirent->d_name + namlen + 1) -
936 (unsigned long)dirent))
938 if ( __put_user(d_ino, &dirent->d_ino) ||
939 __put_user(offset, &dirent->d_offset) ||
940 __put_user(namlen, &dirent->d_namlen) ||
941 __copy_to_user(dirent->d_name, name, namlen) ||
942 __put_user(0, dirent->d_name + namlen))
946 buf->result = -EFAULT;
950 asmlinkage long compat_sys_old_readdir(unsigned int fd,
951 struct compat_old_linux_dirent __user *dirent, unsigned int count)
955 struct compat_readdir_callback buf;
965 error = vfs_readdir(file, compat_fillonedir, &buf);
974 struct compat_linux_dirent {
975 compat_ulong_t d_ino;
976 compat_ulong_t d_off;
977 unsigned short d_reclen;
981 struct compat_getdents_callback {
982 struct compat_linux_dirent __user *current_dir;
983 struct compat_linux_dirent __user *previous;
988 static int compat_filldir(void *__buf, const char *name, int namlen,
989 loff_t offset, u64 ino, unsigned int d_type)
991 struct compat_linux_dirent __user * dirent;
992 struct compat_getdents_callback *buf = __buf;
993 compat_ulong_t d_ino;
994 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
996 buf->error = -EINVAL; /* only used if we fail.. */
997 if (reclen > buf->count)
1000 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
1002 dirent = buf->previous;
1004 if (__put_user(offset, &dirent->d_off))
1007 dirent = buf->current_dir;
1008 if (__put_user(d_ino, &dirent->d_ino))
1010 if (__put_user(reclen, &dirent->d_reclen))
1012 if (copy_to_user(dirent->d_name, name, namlen))
1014 if (__put_user(0, dirent->d_name + namlen))
1016 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
1018 buf->previous = dirent;
1019 dirent = (void __user *)dirent + reclen;
1020 buf->current_dir = dirent;
1021 buf->count -= reclen;
1024 buf->error = -EFAULT;
1028 asmlinkage long compat_sys_getdents(unsigned int fd,
1029 struct compat_linux_dirent __user *dirent, unsigned int count)
1032 struct compat_linux_dirent __user * lastdirent;
1033 struct compat_getdents_callback buf;
1037 if (!access_ok(VERIFY_WRITE, dirent, count))
1045 buf.current_dir = dirent;
1046 buf.previous = NULL;
1050 error = vfs_readdir(file, compat_filldir, &buf);
1054 lastdirent = buf.previous;
1056 if (put_user(file->f_pos, &lastdirent->d_off))
1059 error = count - buf.count;
1068 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1069 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1071 struct compat_getdents_callback64 {
1072 struct linux_dirent64 __user *current_dir;
1073 struct linux_dirent64 __user *previous;
1078 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1079 u64 ino, unsigned int d_type)
1081 struct linux_dirent64 __user *dirent;
1082 struct compat_getdents_callback64 *buf = __buf;
1083 int jj = NAME_OFFSET(dirent);
1084 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1087 buf->error = -EINVAL; /* only used if we fail.. */
1088 if (reclen > buf->count)
1090 dirent = buf->previous;
1093 if (__put_user_unaligned(offset, &dirent->d_off))
1096 dirent = buf->current_dir;
1097 if (__put_user_unaligned(ino, &dirent->d_ino))
1100 if (__put_user_unaligned(off, &dirent->d_off))
1102 if (__put_user(reclen, &dirent->d_reclen))
1104 if (__put_user(d_type, &dirent->d_type))
1106 if (copy_to_user(dirent->d_name, name, namlen))
1108 if (__put_user(0, dirent->d_name + namlen))
1110 buf->previous = dirent;
1111 dirent = (void __user *)dirent + reclen;
1112 buf->current_dir = dirent;
1113 buf->count -= reclen;
1116 buf->error = -EFAULT;
1120 asmlinkage long compat_sys_getdents64(unsigned int fd,
1121 struct linux_dirent64 __user * dirent, unsigned int count)
1124 struct linux_dirent64 __user * lastdirent;
1125 struct compat_getdents_callback64 buf;
1129 if (!access_ok(VERIFY_WRITE, dirent, count))
1137 buf.current_dir = dirent;
1138 buf.previous = NULL;
1142 error = vfs_readdir(file, compat_filldir64, &buf);
1146 lastdirent = buf.previous;
1148 typeof(lastdirent->d_off) d_off = file->f_pos;
1150 if (__put_user_unaligned(d_off, &lastdirent->d_off))
1152 error = count - buf.count;
1160 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1162 static ssize_t compat_do_readv_writev(int type, struct file *file,
1163 const struct compat_iovec __user *uvector,
1164 unsigned long nr_segs, loff_t *pos)
1166 compat_ssize_t tot_len;
1167 struct iovec iovstack[UIO_FASTIOV];
1168 struct iovec *iov=iovstack, *vector;
1175 * SuS says "The readv() function *may* fail if the iovcnt argument
1176 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1177 * traditionally returned zero for zero segments, so...
1184 * First get the "struct iovec" from user memory and
1185 * verify all the pointers
1188 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1192 if (nr_segs > UIO_FASTIOV) {
1194 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1199 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1203 * Single unix specification:
1204 * We should -EINVAL if an element length is not >= 0 and fitting an
1205 * ssize_t. The total length is fitting an ssize_t
1207 * Be careful here because iov_len is a size_t not an ssize_t
1212 for (seg = 0 ; seg < nr_segs; seg++) {
1213 compat_ssize_t tmp = tot_len;
1217 if (__get_user(len, &uvector->iov_len) ||
1218 __get_user(buf, &uvector->iov_base)) {
1222 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1225 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1227 vector->iov_base = compat_ptr(buf);
1228 vector->iov_len = (compat_size_t) len;
1237 ret = rw_verify_area(type, file, pos, tot_len);
1241 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1247 fn = file->f_op->read;
1248 fnv = file->f_op->aio_read;
1250 fn = (io_fn_t)file->f_op->write;
1251 fnv = file->f_op->aio_write;
1255 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1258 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1261 if (iov != iovstack)
1263 if ((ret + (type == READ)) > 0) {
1264 struct dentry *dentry = file->f_path.dentry;
1266 fsnotify_access(dentry);
1268 fsnotify_modify(dentry);
1274 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1277 ssize_t ret = -EBADF;
1283 if (!(file->f_mode & FMODE_READ))
1287 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1290 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1298 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1301 ssize_t ret = -EBADF;
1306 if (!(file->f_mode & FMODE_WRITE))
1310 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1313 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1321 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1322 unsigned int nr_segs, unsigned int flags)
1325 struct iovec __user *iov;
1326 if (nr_segs > UIO_MAXIOV)
1328 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1329 for (i = 0; i < nr_segs; i++) {
1330 struct compat_iovec v;
1331 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1332 get_user(v.iov_len, &iov32[i].iov_len) ||
1333 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1334 put_user(v.iov_len, &iov[i].iov_len))
1337 return sys_vmsplice(fd, iov, nr_segs, flags);
1341 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1345 compat_sys_open(const char __user *filename, int flags, int mode)
1347 return do_sys_open(AT_FDCWD, filename, flags, mode);
1351 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1355 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1357 return do_sys_open(dfd, filename, flags, mode);
1361 * compat_count() counts the number of arguments/envelopes. It is basically
1362 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1363 * and envp pointers.
1365 static int compat_count(compat_uptr_t __user *argv, int max)
1373 if (get_user(p, argv))
1386 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1387 * except that it works with 32 bit argv and envp pointers.
1389 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1390 struct linux_binprm *bprm)
1392 struct page *kmapped_page = NULL;
1396 while (argc-- > 0) {
1401 if (get_user(str, argv+argc) ||
1402 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1407 if (bprm->p < len) {
1413 /* XXX: add architecture specific overflow check here. */
1418 int offset, bytes_to_copy;
1421 offset = pos % PAGE_SIZE;
1423 page = bprm->page[i];
1426 page = alloc_page(GFP_HIGHUSER);
1427 bprm->page[i] = page;
1435 if (page != kmapped_page) {
1437 kunmap(kmapped_page);
1438 kmapped_page = page;
1439 kaddr = kmap(kmapped_page);
1442 memset(kaddr, 0, offset);
1443 bytes_to_copy = PAGE_SIZE - offset;
1444 if (bytes_to_copy > len) {
1445 bytes_to_copy = len;
1447 memset(kaddr+offset+len, 0,
1448 PAGE_SIZE-offset-len);
1450 err = copy_from_user(kaddr+offset, compat_ptr(str),
1457 pos += bytes_to_copy;
1458 str += bytes_to_copy;
1459 len -= bytes_to_copy;
1465 kunmap(kmapped_page);
1471 #define free_arg_pages(bprm) do { } while (0)
1475 static inline void free_arg_pages(struct linux_binprm *bprm)
1479 for (i = 0; i < MAX_ARG_PAGES; i++) {
1481 __free_page(bprm->page[i]);
1482 bprm->page[i] = NULL;
1486 #endif /* CONFIG_MMU */
1489 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1490 * that it processes 32 bit argv and envp pointers.
1492 int compat_do_execve(char * filename,
1493 compat_uptr_t __user *argv,
1494 compat_uptr_t __user *envp,
1495 struct pt_regs * regs)
1497 struct linux_binprm *bprm;
1503 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1507 file = open_exec(filename);
1508 retval = PTR_ERR(file);
1514 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1516 bprm->filename = filename;
1517 bprm->interp = filename;
1518 bprm->mm = mm_alloc();
1523 retval = init_new_context(current, bprm->mm);
1527 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1528 if ((retval = bprm->argc) < 0)
1531 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1532 if ((retval = bprm->envc) < 0)
1535 retval = security_bprm_alloc(bprm);
1539 retval = prepare_binprm(bprm);
1543 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1547 bprm->exec = bprm->p;
1548 retval = compat_copy_strings(bprm->envc, envp, bprm);
1552 retval = compat_copy_strings(bprm->argc, argv, bprm);
1556 retval = search_binary_handler(bprm, regs);
1558 free_arg_pages(bprm);
1560 /* execve success */
1561 security_bprm_free(bprm);
1562 acct_update_integrals(current);
1568 /* Something went wrong, return the inode and free the argument pages*/
1569 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1570 struct page * page = bprm->page[i];
1576 security_bprm_free(bprm);
1584 allow_write_access(bprm->file);
1595 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1597 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1600 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1601 * 64-bit unsigned longs.
1604 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1605 unsigned long *fdset)
1607 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1611 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1618 if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
1621 *fdset++ = h << 32 | l;
1624 if (odd && __get_user(*fdset, ufdset))
1627 /* Tricky, must clear full unsigned long in the
1628 * kernel fdset at the end, this makes sure that
1631 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1637 int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1638 unsigned long *fdset)
1641 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1652 if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
1657 if (odd && __put_user(*fdset, ufdset))
1664 * This is a virtual copy of sys_select from fs/select.c and probably
1665 * should be compared to it from time to time
1669 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1670 * like to be certain this leads to no problems. So I return
1671 * EINTR just for safety.
1673 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1674 * I'm trying ERESTARTNOHAND which restart only when you want to.
1676 #define MAX_SELECT_SECONDS \
1677 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1679 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1680 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1684 int size, max_fds, ret = -EINVAL;
1685 struct fdtable *fdt;
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
1704 size = FDS_BYTES(n);
1705 bits = kmalloc(6 * size, GFP_KERNEL);
1708 fds.in = (unsigned long *) bits;
1709 fds.out = (unsigned long *) (bits + size);
1710 fds.ex = (unsigned long *) (bits + 2*size);
1711 fds.res_in = (unsigned long *) (bits + 3*size);
1712 fds.res_out = (unsigned long *) (bits + 4*size);
1713 fds.res_ex = (unsigned long *) (bits + 5*size);
1715 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1716 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1717 (ret = compat_get_fd_set(n, exp, fds.ex)))
1719 zero_fd_set(n, fds.res_in);
1720 zero_fd_set(n, fds.res_out);
1721 zero_fd_set(n, fds.res_ex);
1723 ret = do_select(n, &fds, timeout);
1728 ret = -ERESTARTNOHAND;
1729 if (signal_pending(current))
1734 if (compat_set_fd_set(n, inp, fds.res_in) ||
1735 compat_set_fd_set(n, outp, fds.res_out) ||
1736 compat_set_fd_set(n, exp, fds.res_ex))
1744 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1745 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1746 struct compat_timeval __user *tvp)
1749 struct compat_timeval tv;
1753 if (copy_from_user(&tv, tvp, sizeof(tv)))
1756 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1759 /* Cast to u64 to make GCC stop complaining */
1760 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1761 timeout = -1; /* infinite */
1763 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1764 timeout += tv.tv_sec * HZ;
1768 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1771 struct compat_timeval rtv;
1773 if (current->personality & STICKY_TIMEOUTS)
1775 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1776 rtv.tv_sec = timeout;
1777 if (compat_timeval_compare(&rtv, &tv) >= 0)
1779 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1782 * If an application puts its timeval in read-only
1783 * memory, we don't want the Linux-specific update to
1784 * the timeval to cause a fault after the select has
1785 * completed successfully. However, because we're not
1786 * updating the timeval, we can't restart the system
1789 if (ret == -ERESTARTNOHAND)
1797 #ifdef TIF_RESTORE_SIGMASK
1798 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1799 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1800 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1801 compat_size_t sigsetsize)
1803 compat_sigset_t ss32;
1804 sigset_t ksigmask, sigsaved;
1805 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1806 struct compat_timespec ts;
1810 if (copy_from_user(&ts, tsp, sizeof(ts)))
1813 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1818 if (sigsetsize != sizeof(compat_sigset_t))
1820 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1822 sigset_from_compat(&ksigmask, &ss32);
1824 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1825 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1830 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1831 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1832 timeout += ts.tv_sec * (unsigned long)HZ;
1836 ts.tv_sec -= MAX_SELECT_SECONDS;
1837 timeout = MAX_SELECT_SECONDS * HZ;
1841 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1843 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1846 struct compat_timespec rts;
1848 if (current->personality & STICKY_TIMEOUTS)
1851 rts.tv_sec = timeout / HZ;
1852 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1853 if (rts.tv_nsec >= NSEC_PER_SEC) {
1855 rts.tv_nsec -= NSEC_PER_SEC;
1857 if (compat_timespec_compare(&rts, &ts) >= 0)
1859 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1862 * If an application puts its timeval in read-only
1863 * memory, we don't want the Linux-specific update to
1864 * the timeval to cause a fault after the select has
1865 * completed successfully. However, because we're not
1866 * updating the timeval, we can't restart the system
1869 if (ret == -ERESTARTNOHAND)
1874 if (ret == -ERESTARTNOHAND) {
1876 * Don't restore the signal mask yet. Let do_signal() deliver
1877 * the signal on the way back to userspace, before the signal
1881 memcpy(¤t->saved_sigmask, &sigsaved,
1883 set_thread_flag(TIF_RESTORE_SIGMASK);
1886 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1891 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1892 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1893 struct compat_timespec __user *tsp, void __user *sig)
1895 compat_size_t sigsetsize = 0;
1896 compat_uptr_t up = 0;
1899 if (!access_ok(VERIFY_READ, sig,
1900 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1901 __get_user(up, (compat_uptr_t __user *)sig) ||
1902 __get_user(sigsetsize,
1903 (compat_size_t __user *)(sig+sizeof(up))))
1906 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1910 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1911 unsigned int nfds, struct compat_timespec __user *tsp,
1912 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1914 compat_sigset_t ss32;
1915 sigset_t ksigmask, sigsaved;
1916 struct compat_timespec ts;
1921 if (copy_from_user(&ts, tsp, sizeof(ts)))
1924 /* We assume that ts.tv_sec is always lower than
1925 the number of seconds that can be expressed in
1926 an s64. Otherwise the compiler bitches at us */
1927 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1928 timeout += ts.tv_sec * HZ;
1932 if (sigsetsize != sizeof(compat_sigset_t))
1934 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1936 sigset_from_compat(&ksigmask, &ss32);
1938 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1939 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1942 ret = do_sys_poll(ufds, nfds, &timeout);
1944 /* We can restart this syscall, usually */
1945 if (ret == -EINTR) {
1947 * Don't restore the signal mask yet. Let do_signal() deliver
1948 * the signal on the way back to userspace, before the signal
1952 memcpy(¤t->saved_sigmask, &sigsaved,
1954 set_thread_flag(TIF_RESTORE_SIGMASK);
1956 ret = -ERESTARTNOHAND;
1958 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1960 if (tsp && timeout >= 0) {
1961 struct compat_timespec rts;
1963 if (current->personality & STICKY_TIMEOUTS)
1965 /* Yes, we know it's actually an s64, but it's also positive. */
1966 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1968 rts.tv_sec = timeout;
1969 if (compat_timespec_compare(&rts, &ts) >= 0)
1971 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1974 * If an application puts its timeval in read-only
1975 * memory, we don't want the Linux-specific update to
1976 * the timeval to cause a fault after the select has
1977 * completed successfully. However, because we're not
1978 * updating the timeval, we can't restart the system
1981 if (ret == -ERESTARTNOHAND && timeout >= 0)
1988 #endif /* TIF_RESTORE_SIGMASK */
1990 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1991 /* Stuff for NFS server syscalls... */
1992 struct compat_nfsctl_svc {
1997 struct compat_nfsctl_client {
1998 s8 cl32_ident[NFSCLNT_IDMAX+1];
2000 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
2003 u8 cl32_fhkey[NFSCLNT_KEYMAX];
2006 struct compat_nfsctl_export {
2007 char ex32_client[NFSCLNT_IDMAX+1];
2008 char ex32_path[NFS_MAXPATHLEN+1];
2009 compat_dev_t ex32_dev;
2010 compat_ino_t ex32_ino;
2011 compat_int_t ex32_flags;
2012 __compat_uid_t ex32_anon_uid;
2013 __compat_gid_t ex32_anon_gid;
2016 struct compat_nfsctl_fdparm {
2017 struct sockaddr gd32_addr;
2018 s8 gd32_path[NFS_MAXPATHLEN+1];
2019 compat_int_t gd32_version;
2022 struct compat_nfsctl_fsparm {
2023 struct sockaddr gd32_addr;
2024 s8 gd32_path[NFS_MAXPATHLEN+1];
2025 compat_int_t gd32_maxlen;
2028 struct compat_nfsctl_arg {
2029 compat_int_t ca32_version; /* safeguard */
2031 struct compat_nfsctl_svc u32_svc;
2032 struct compat_nfsctl_client u32_client;
2033 struct compat_nfsctl_export u32_export;
2034 struct compat_nfsctl_fdparm u32_getfd;
2035 struct compat_nfsctl_fsparm u32_getfs;
2037 #define ca32_svc u.u32_svc
2038 #define ca32_client u.u32_client
2039 #define ca32_export u.u32_export
2040 #define ca32_getfd u.u32_getfd
2041 #define ca32_getfs u.u32_getfs
2044 union compat_nfsctl_res {
2045 __u8 cr32_getfh[NFS_FHSIZE];
2046 struct knfsd_fh cr32_getfs;
2049 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2050 struct compat_nfsctl_arg __user *arg)
2052 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2053 get_user(karg->ca_version, &arg->ca32_version) ||
2054 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2055 __get_user(karg->ca_svc.svc_nthreads,
2056 &arg->ca32_svc.svc32_nthreads))
2061 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2062 struct compat_nfsctl_arg __user *arg)
2064 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2065 sizeof(arg->ca32_client)) ||
2066 get_user(karg->ca_version, &arg->ca32_version) ||
2067 __copy_from_user(&karg->ca_client.cl_ident[0],
2068 &arg->ca32_client.cl32_ident[0],
2070 __get_user(karg->ca_client.cl_naddr,
2071 &arg->ca32_client.cl32_naddr) ||
2072 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2073 &arg->ca32_client.cl32_addrlist[0],
2074 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2075 __get_user(karg->ca_client.cl_fhkeytype,
2076 &arg->ca32_client.cl32_fhkeytype) ||
2077 __get_user(karg->ca_client.cl_fhkeylen,
2078 &arg->ca32_client.cl32_fhkeylen) ||
2079 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2080 &arg->ca32_client.cl32_fhkey[0],
2087 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2088 struct compat_nfsctl_arg __user *arg)
2090 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2091 sizeof(arg->ca32_export)) ||
2092 get_user(karg->ca_version, &arg->ca32_version) ||
2093 __copy_from_user(&karg->ca_export.ex_client[0],
2094 &arg->ca32_export.ex32_client[0],
2096 __copy_from_user(&karg->ca_export.ex_path[0],
2097 &arg->ca32_export.ex32_path[0],
2099 __get_user(karg->ca_export.ex_dev,
2100 &arg->ca32_export.ex32_dev) ||
2101 __get_user(karg->ca_export.ex_ino,
2102 &arg->ca32_export.ex32_ino) ||
2103 __get_user(karg->ca_export.ex_flags,
2104 &arg->ca32_export.ex32_flags) ||
2105 __get_user(karg->ca_export.ex_anon_uid,
2106 &arg->ca32_export.ex32_anon_uid) ||
2107 __get_user(karg->ca_export.ex_anon_gid,
2108 &arg->ca32_export.ex32_anon_gid))
2110 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2111 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2116 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2117 struct compat_nfsctl_arg __user *arg)
2119 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2120 sizeof(arg->ca32_getfd)) ||
2121 get_user(karg->ca_version, &arg->ca32_version) ||
2122 __copy_from_user(&karg->ca_getfd.gd_addr,
2123 &arg->ca32_getfd.gd32_addr,
2124 (sizeof(struct sockaddr))) ||
2125 __copy_from_user(&karg->ca_getfd.gd_path,
2126 &arg->ca32_getfd.gd32_path,
2127 (NFS_MAXPATHLEN+1)) ||
2128 __get_user(karg->ca_getfd.gd_version,
2129 &arg->ca32_getfd.gd32_version))
2135 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2136 struct compat_nfsctl_arg __user *arg)
2138 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2139 get_user(karg->ca_version, &arg->ca32_version) ||
2140 __copy_from_user(&karg->ca_getfs.gd_addr,
2141 &arg->ca32_getfs.gd32_addr,
2142 (sizeof(struct sockaddr))) ||
2143 __copy_from_user(&karg->ca_getfs.gd_path,
2144 &arg->ca32_getfs.gd32_path,
2145 (NFS_MAXPATHLEN+1)) ||
2146 __get_user(karg->ca_getfs.gd_maxlen,
2147 &arg->ca32_getfs.gd32_maxlen))
2153 /* This really doesn't need translations, we are only passing
2154 * back a union which contains opaque nfs file handle data.
2156 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2157 union compat_nfsctl_res __user *res)
2161 err = copy_to_user(res, kres, sizeof(*res));
2163 return (err) ? -EFAULT : 0;
2166 asmlinkage long compat_sys_nfsservctl(int cmd,
2167 struct compat_nfsctl_arg __user *arg,
2168 union compat_nfsctl_res __user *res)
2170 struct nfsctl_arg *karg;
2171 union nfsctl_res *kres;
2175 karg = kmalloc(sizeof(*karg), GFP_USER);
2176 kres = kmalloc(sizeof(*kres), GFP_USER);
2177 if(!karg || !kres) {
2184 err = compat_nfs_svc_trans(karg, arg);
2187 case NFSCTL_ADDCLIENT:
2188 err = compat_nfs_clnt_trans(karg, arg);
2191 case NFSCTL_DELCLIENT:
2192 err = compat_nfs_clnt_trans(karg, arg);
2196 case NFSCTL_UNEXPORT:
2197 err = compat_nfs_exp_trans(karg, arg);
2201 err = compat_nfs_getfd_trans(karg, arg);
2205 err = compat_nfs_getfs_trans(karg, arg);
2218 /* The __user pointer casts are valid because of the set_fs() */
2219 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2225 if((cmd == NFSCTL_GETFD) ||
2226 (cmd == NFSCTL_GETFS))
2227 err = compat_nfs_getfh_res_trans(kres, res);
2235 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2237 return sys_ni_syscall();
2243 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2244 asmlinkage long compat_sys_epoll_ctl(int epfd, int op, int fd,
2245 struct compat_epoll_event __user *event)
2248 struct compat_epoll_event user;
2249 struct epoll_event __user *kernel = NULL;
2252 if (copy_from_user(&user, event, sizeof(user)))
2254 kernel = compat_alloc_user_space(sizeof(struct epoll_event));
2255 err |= __put_user(user.events, &kernel->events);
2256 err |= __put_user(user.data, &kernel->data);
2259 return err ? err : sys_epoll_ctl(epfd, op, fd, kernel);
2263 asmlinkage long compat_sys_epoll_wait(int epfd,
2264 struct compat_epoll_event __user *events,
2265 int maxevents, int timeout)
2267 long i, ret, err = 0;
2268 struct epoll_event __user *kbuf;
2269 struct epoll_event ev;
2271 if ((maxevents <= 0) ||
2272 (maxevents > (INT_MAX / sizeof(struct epoll_event))))
2274 kbuf = compat_alloc_user_space(sizeof(struct epoll_event) * maxevents);
2275 ret = sys_epoll_wait(epfd, kbuf, maxevents, timeout);
2276 for (i = 0; i < ret; i++) {
2277 err |= __get_user(ev.events, &kbuf[i].events);
2278 err |= __get_user(ev.data, &kbuf[i].data);
2279 err |= __put_user(ev.events, &events->events);
2280 err |= __put_user_unaligned(ev.data, &events->data);
2284 return err ? -EFAULT: ret;
2286 #endif /* CONFIG_HAS_COMPAT_EPOLL_EVENT */
2288 #ifdef TIF_RESTORE_SIGMASK
2289 asmlinkage long compat_sys_epoll_pwait(int epfd,
2290 struct compat_epoll_event __user *events,
2291 int maxevents, int timeout,
2292 const compat_sigset_t __user *sigmask,
2293 compat_size_t sigsetsize)
2296 compat_sigset_t csigmask;
2297 sigset_t ksigmask, sigsaved;
2300 * If the caller wants a certain signal mask to be set during the wait,
2304 if (sigsetsize != sizeof(compat_sigset_t))
2306 if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
2308 sigset_from_compat(&ksigmask, &csigmask);
2309 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
2310 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
2313 #ifdef CONFIG_HAS_COMPAT_EPOLL_EVENT
2314 err = compat_sys_epoll_wait(epfd, events, maxevents, timeout);
2316 err = sys_epoll_wait(epfd, events, maxevents, timeout);
2320 * If we changed the signal mask, we need to restore the original one.
2321 * In case we've got a signal while waiting, we do not restore the
2322 * signal mask yet, and we allow do_signal() to deliver the signal on
2323 * the way back to userspace, before the signal mask is restored.
2326 if (err == -EINTR) {
2327 memcpy(¤t->saved_sigmask, &sigsaved,
2329 set_thread_flag(TIF_RESTORE_SIGMASK);
2331 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2336 #endif /* TIF_RESTORE_SIGMASK */
2338 #endif /* CONFIG_EPOLL */