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>
51 #include <net/sock.h> /* siocdevprivate_ioctl */
53 #include <asm/uaccess.h>
54 #include <asm/mmu_context.h>
55 #include <asm/ioctls.h>
60 int compat_printk(const char *fmt, ...)
67 ret = vprintk(fmt, ap);
72 #include "read_write.h"
75 * Not all architectures have sys_utime, so implement this in terms
78 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
83 if (get_user(tv[0].tv_sec, &t->actime) ||
84 get_user(tv[1].tv_sec, &t->modtime))
89 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
92 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
97 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
98 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
99 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
100 get_user(tv[1].tv_usec, &t[1].tv_usec))
103 return do_utimes(dfd, filename, t ? tv : NULL);
106 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
108 return compat_sys_futimesat(AT_FDCWD, filename, t);
111 asmlinkage long compat_sys_newstat(char __user * filename,
112 struct compat_stat __user *statbuf)
115 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
118 error = cp_compat_stat(&stat, statbuf);
122 asmlinkage long compat_sys_newlstat(char __user * filename,
123 struct compat_stat __user *statbuf)
126 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
129 error = cp_compat_stat(&stat, statbuf);
133 #ifndef __ARCH_WANT_STAT64
134 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
135 struct compat_stat __user *statbuf, int flag)
140 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
143 if (flag & AT_SYMLINK_NOFOLLOW)
144 error = vfs_lstat_fd(dfd, filename, &stat);
146 error = vfs_stat_fd(dfd, filename, &stat);
149 error = cp_compat_stat(&stat, statbuf);
156 asmlinkage long compat_sys_newfstat(unsigned int fd,
157 struct compat_stat __user * statbuf)
160 int error = vfs_fstat(fd, &stat);
163 error = cp_compat_stat(&stat, statbuf);
167 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
170 if (sizeof ubuf->f_blocks == 4) {
171 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
172 0xffffffff00000000ULL)
174 /* f_files and f_ffree may be -1; it's okay
175 * to stuff that into 32 bits */
176 if (kbuf->f_files != 0xffffffffffffffffULL
177 && (kbuf->f_files & 0xffffffff00000000ULL))
179 if (kbuf->f_ffree != 0xffffffffffffffffULL
180 && (kbuf->f_ffree & 0xffffffff00000000ULL))
183 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
184 __put_user(kbuf->f_type, &ubuf->f_type) ||
185 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
186 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
187 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
188 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
189 __put_user(kbuf->f_files, &ubuf->f_files) ||
190 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
191 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
192 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
193 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
194 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
195 __put_user(0, &ubuf->f_spare[0]) ||
196 __put_user(0, &ubuf->f_spare[1]) ||
197 __put_user(0, &ubuf->f_spare[2]) ||
198 __put_user(0, &ubuf->f_spare[3]) ||
199 __put_user(0, &ubuf->f_spare[4]))
205 * The following statfs calls are copies of code from fs/open.c and
206 * should be checked against those from time to time
208 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
213 error = user_path_walk(path, &nd);
216 error = vfs_statfs(nd.dentry, &tmp);
218 error = put_compat_statfs(buf, &tmp);
224 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
234 error = vfs_statfs(file->f_dentry, &tmp);
236 error = put_compat_statfs(buf, &tmp);
242 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
244 if (sizeof ubuf->f_blocks == 4) {
245 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
246 0xffffffff00000000ULL)
248 /* f_files and f_ffree may be -1; it's okay
249 * to stuff that into 32 bits */
250 if (kbuf->f_files != 0xffffffffffffffffULL
251 && (kbuf->f_files & 0xffffffff00000000ULL))
253 if (kbuf->f_ffree != 0xffffffffffffffffULL
254 && (kbuf->f_ffree & 0xffffffff00000000ULL))
257 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
258 __put_user(kbuf->f_type, &ubuf->f_type) ||
259 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
260 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
261 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
262 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
263 __put_user(kbuf->f_files, &ubuf->f_files) ||
264 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
265 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
266 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
267 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
268 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
273 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
278 if (sz != sizeof(*buf))
281 error = user_path_walk(path, &nd);
284 error = vfs_statfs(nd.dentry, &tmp);
286 error = put_compat_statfs64(buf, &tmp);
292 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
298 if (sz != sizeof(*buf))
305 error = vfs_statfs(file->f_dentry, &tmp);
307 error = put_compat_statfs64(buf, &tmp);
313 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
315 #define IOCTL_HASHSIZE 256
316 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
318 static inline unsigned long ioctl32_hash(unsigned long cmd)
320 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
323 static void ioctl32_insert_translation(struct ioctl_trans *trans)
326 struct ioctl_trans *t;
328 hash = ioctl32_hash (trans->cmd);
329 if (!ioctl32_hash_table[hash])
330 ioctl32_hash_table[hash] = trans;
332 t = ioctl32_hash_table[hash];
340 static int __init init_sys32_ioctl(void)
344 for (i = 0; i < ioctl_table_size; i++) {
345 if (ioctl_start[i].next != 0) {
346 printk("ioctl translation %d bad\n",i);
350 ioctl32_insert_translation(&ioctl_start[i]);
355 __initcall(init_sys32_ioctl);
357 static void compat_ioctl_error(struct file *filp, unsigned int fd,
358 unsigned int cmd, unsigned long arg)
364 /* find the name of the device. */
365 path = (char *)__get_free_page(GFP_KERNEL);
367 fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
372 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
373 if (!isprint(buf[1]))
374 sprintf(buf, "%02x", buf[1]);
375 compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
376 "cmd(%08x){%s} arg(%08x) on %s\n",
377 current->comm, current->pid,
378 (int)fd, (unsigned int)cmd, buf,
379 (unsigned int)arg, fn);
382 free_page((unsigned long)path);
385 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
390 struct ioctl_trans *t;
393 filp = fget_light(fd, &fput_needed);
397 /* RED-PEN how should LSM module know it's handling 32bit? */
398 error = security_file_ioctl(filp, cmd, arg);
403 * To allow the compat_ioctl handlers to be self contained
404 * we need to check the common ioctls here first.
405 * Just handle them with the standard handlers below.
418 if (S_ISREG(filp->f_dentry->d_inode->i_mode))
423 if (filp->f_op && filp->f_op->compat_ioctl) {
424 error = filp->f_op->compat_ioctl(filp, cmd, arg);
425 if (error != -ENOIOCTLCMD)
430 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
435 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
440 if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
441 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
442 error = siocdevprivate_ioctl(fd, cmd, arg);
447 compat_ioctl_error(filp, fd, cmd, arg);
456 error = t->handler(fd, cmd, arg, filp);
462 error = vfs_ioctl(filp, fd, cmd, arg);
464 fput_light(filp, fput_needed);
469 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
471 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
472 __get_user(kfl->l_type, &ufl->l_type) ||
473 __get_user(kfl->l_whence, &ufl->l_whence) ||
474 __get_user(kfl->l_start, &ufl->l_start) ||
475 __get_user(kfl->l_len, &ufl->l_len) ||
476 __get_user(kfl->l_pid, &ufl->l_pid))
481 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
483 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
484 __put_user(kfl->l_type, &ufl->l_type) ||
485 __put_user(kfl->l_whence, &ufl->l_whence) ||
486 __put_user(kfl->l_start, &ufl->l_start) ||
487 __put_user(kfl->l_len, &ufl->l_len) ||
488 __put_user(kfl->l_pid, &ufl->l_pid))
493 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
494 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
496 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
497 __get_user(kfl->l_type, &ufl->l_type) ||
498 __get_user(kfl->l_whence, &ufl->l_whence) ||
499 __get_user(kfl->l_start, &ufl->l_start) ||
500 __get_user(kfl->l_len, &ufl->l_len) ||
501 __get_user(kfl->l_pid, &ufl->l_pid))
507 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
508 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
510 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
511 __put_user(kfl->l_type, &ufl->l_type) ||
512 __put_user(kfl->l_whence, &ufl->l_whence) ||
513 __put_user(kfl->l_start, &ufl->l_start) ||
514 __put_user(kfl->l_len, &ufl->l_len) ||
515 __put_user(kfl->l_pid, &ufl->l_pid))
521 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
532 ret = get_compat_flock(&f, compat_ptr(arg));
537 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
539 if (cmd == F_GETLK && ret == 0) {
540 /* GETLK was successfule and we need to return the data...
541 * but it needs to fit in the compat structure.
542 * l_start shouldn't be too big, unless the original
543 * start + end is greater than COMPAT_OFF_T_MAX, in which
544 * case the app was asking for trouble, so we return
545 * -EOVERFLOW in that case.
546 * l_len could be too big, in which case we just truncate it,
547 * and only allow the app to see that part of the conflicting
548 * lock that might make sense to it anyway
551 if (f.l_start > COMPAT_OFF_T_MAX)
553 if (f.l_len > COMPAT_OFF_T_MAX)
554 f.l_len = COMPAT_OFF_T_MAX;
556 ret = put_compat_flock(&f, compat_ptr(arg));
563 ret = get_compat_flock64(&f, compat_ptr(arg));
568 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
569 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
572 if (cmd == F_GETLK64 && ret == 0) {
573 /* need to return lock information - see above for commentary */
574 if (f.l_start > COMPAT_LOFF_T_MAX)
576 if (f.l_len > COMPAT_LOFF_T_MAX)
577 f.l_len = COMPAT_LOFF_T_MAX;
579 ret = put_compat_flock64(&f, compat_ptr(arg));
584 ret = sys_fcntl(fd, cmd, arg);
590 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
593 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
595 return compat_sys_fcntl64(fd, cmd, arg);
599 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
604 mm_segment_t oldfs = get_fs();
605 if (unlikely(get_user(ctx64, ctx32p)))
609 /* The __user pointer cast is valid because of the set_fs() */
610 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
612 /* truncating is ok because it's a user address */
614 ret = put_user((u32) ctx64, ctx32p);
619 compat_sys_io_getevents(aio_context_t ctx_id,
620 unsigned long min_nr,
622 struct io_event __user *events,
623 struct compat_timespec __user *timeout)
627 struct timespec __user *ut = NULL;
630 if (unlikely(!access_ok(VERIFY_WRITE, events,
631 nr * sizeof(struct io_event))))
634 if (get_compat_timespec(&t, timeout))
637 ut = compat_alloc_user_space(sizeof(*ut));
638 if (copy_to_user(ut, &t, sizeof(t)) )
641 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
647 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
652 for (i = 0; i < nr; ++i) {
653 if (get_user(uptr, ptr32 + i))
655 if (put_user(compat_ptr(uptr), ptr64 + i))
661 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
664 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
666 struct iocb __user * __user *iocb64;
669 if (unlikely(nr < 0))
672 if (nr > MAX_AIO_SUBMITS)
673 nr = MAX_AIO_SUBMITS;
675 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
676 ret = copy_iocb(nr, iocb, iocb64);
678 ret = sys_io_submit(ctx_id, nr, iocb64);
682 struct compat_ncp_mount_data {
683 compat_int_t version;
684 compat_uint_t ncp_fd;
685 __compat_uid_t mounted_uid;
686 compat_pid_t wdog_pid;
687 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
688 compat_uint_t time_out;
689 compat_uint_t retry_count;
693 compat_mode_t file_mode;
694 compat_mode_t dir_mode;
697 struct compat_ncp_mount_data_v4 {
698 compat_int_t version;
699 compat_ulong_t flags;
700 compat_ulong_t mounted_uid;
701 compat_long_t wdog_pid;
702 compat_uint_t ncp_fd;
703 compat_uint_t time_out;
704 compat_uint_t retry_count;
707 compat_ulong_t file_mode;
708 compat_ulong_t dir_mode;
711 static void *do_ncp_super_data_conv(void *raw_data)
713 int version = *(unsigned int *)raw_data;
716 struct compat_ncp_mount_data *c_n = raw_data;
717 struct ncp_mount_data *n = raw_data;
719 n->dir_mode = c_n->dir_mode;
720 n->file_mode = c_n->file_mode;
723 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
724 n->wdog_pid = c_n->wdog_pid;
725 n->mounted_uid = c_n->mounted_uid;
726 } else if (version == 4) {
727 struct compat_ncp_mount_data_v4 *c_n = raw_data;
728 struct ncp_mount_data_v4 *n = raw_data;
730 n->dir_mode = c_n->dir_mode;
731 n->file_mode = c_n->file_mode;
734 n->retry_count = c_n->retry_count;
735 n->time_out = c_n->time_out;
736 n->ncp_fd = c_n->ncp_fd;
737 n->wdog_pid = c_n->wdog_pid;
738 n->mounted_uid = c_n->mounted_uid;
739 n->flags = c_n->flags;
740 } else if (version != 5) {
747 struct compat_smb_mount_data {
748 compat_int_t version;
749 __compat_uid_t mounted_uid;
752 compat_mode_t file_mode;
753 compat_mode_t dir_mode;
756 static void *do_smb_super_data_conv(void *raw_data)
758 struct smb_mount_data *s = raw_data;
759 struct compat_smb_mount_data *c_s = raw_data;
761 if (c_s->version != SMB_MOUNT_OLDVERSION)
763 s->dir_mode = c_s->dir_mode;
764 s->file_mode = c_s->file_mode;
767 s->mounted_uid = c_s->mounted_uid;
772 struct compat_nfs_string {
777 static inline void compat_nfs_string(struct nfs_string *dst,
778 struct compat_nfs_string *src)
780 dst->data = compat_ptr(src->data);
784 struct compat_nfs4_mount_data_v1 {
785 compat_int_t version;
790 compat_int_t retrans;
791 compat_int_t acregmin;
792 compat_int_t acregmax;
793 compat_int_t acdirmin;
794 compat_int_t acdirmax;
795 struct compat_nfs_string client_addr;
796 struct compat_nfs_string mnt_path;
797 struct compat_nfs_string hostname;
798 compat_uint_t host_addrlen;
799 compat_uptr_t host_addr;
801 compat_int_t auth_flavourlen;
802 compat_uptr_t auth_flavours;
805 static int do_nfs4_super_data_conv(void *raw_data)
807 int version = *(compat_uint_t *) raw_data;
810 struct compat_nfs4_mount_data_v1 *raw = raw_data;
811 struct nfs4_mount_data *real = raw_data;
813 /* copy the fields backwards */
814 real->auth_flavours = compat_ptr(raw->auth_flavours);
815 real->auth_flavourlen = raw->auth_flavourlen;
816 real->proto = raw->proto;
817 real->host_addr = compat_ptr(raw->host_addr);
818 real->host_addrlen = raw->host_addrlen;
819 compat_nfs_string(&real->hostname, &raw->hostname);
820 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
821 compat_nfs_string(&real->client_addr, &raw->client_addr);
822 real->acdirmax = raw->acdirmax;
823 real->acdirmin = raw->acdirmin;
824 real->acregmax = raw->acregmax;
825 real->acregmin = raw->acregmin;
826 real->retrans = raw->retrans;
827 real->timeo = raw->timeo;
828 real->wsize = raw->wsize;
829 real->rsize = raw->rsize;
830 real->flags = raw->flags;
831 real->version = raw->version;
840 #define SMBFS_NAME "smbfs"
841 #define NCPFS_NAME "ncpfs"
842 #define NFS4_NAME "nfs4"
844 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
845 char __user * type, unsigned long flags,
848 unsigned long type_page;
849 unsigned long data_page;
850 unsigned long dev_page;
854 retval = copy_mount_options (type, &type_page);
858 dir_page = getname(dir_name);
859 retval = PTR_ERR(dir_page);
860 if (IS_ERR(dir_page))
863 retval = copy_mount_options (dev_name, &dev_page);
867 retval = copy_mount_options (data, &data_page);
874 if (!strcmp((char *)type_page, SMBFS_NAME)) {
875 do_smb_super_data_conv((void *)data_page);
876 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
877 do_ncp_super_data_conv((void *)data_page);
878 } else if (!strcmp((char *)type_page, NFS4_NAME)) {
879 if (do_nfs4_super_data_conv((void *) data_page))
885 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
886 flags, (void*)data_page);
890 free_page(data_page);
896 free_page(type_page);
901 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
902 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
903 ~(sizeof(compat_long_t)-1))
905 struct compat_old_linux_dirent {
906 compat_ulong_t d_ino;
907 compat_ulong_t d_offset;
908 unsigned short d_namlen;
912 struct compat_readdir_callback {
913 struct compat_old_linux_dirent __user *dirent;
917 static int compat_fillonedir(void *__buf, const char *name, int namlen,
918 loff_t offset, u64 ino, unsigned int d_type)
920 struct compat_readdir_callback *buf = __buf;
921 struct compat_old_linux_dirent __user *dirent;
922 compat_ulong_t d_ino;
927 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
930 dirent = buf->dirent;
931 if (!access_ok(VERIFY_WRITE, dirent,
932 (unsigned long)(dirent->d_name + namlen + 1) -
933 (unsigned long)dirent))
935 if ( __put_user(d_ino, &dirent->d_ino) ||
936 __put_user(offset, &dirent->d_offset) ||
937 __put_user(namlen, &dirent->d_namlen) ||
938 __copy_to_user(dirent->d_name, name, namlen) ||
939 __put_user(0, dirent->d_name + namlen))
943 buf->result = -EFAULT;
947 asmlinkage long compat_sys_old_readdir(unsigned int fd,
948 struct compat_old_linux_dirent __user *dirent, unsigned int count)
952 struct compat_readdir_callback buf;
962 error = vfs_readdir(file, compat_fillonedir, &buf);
971 struct compat_linux_dirent {
972 compat_ulong_t d_ino;
973 compat_ulong_t d_off;
974 unsigned short d_reclen;
978 struct compat_getdents_callback {
979 struct compat_linux_dirent __user *current_dir;
980 struct compat_linux_dirent __user *previous;
985 static int compat_filldir(void *__buf, const char *name, int namlen,
986 loff_t offset, u64 ino, unsigned int d_type)
988 struct compat_linux_dirent __user * dirent;
989 struct compat_getdents_callback *buf = __buf;
990 compat_ulong_t d_ino;
991 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
993 buf->error = -EINVAL; /* only used if we fail.. */
994 if (reclen > buf->count)
997 if (sizeof(d_ino) < sizeof(ino) && d_ino != ino)
999 dirent = buf->previous;
1001 if (__put_user(offset, &dirent->d_off))
1004 dirent = buf->current_dir;
1005 if (__put_user(d_ino, &dirent->d_ino))
1007 if (__put_user(reclen, &dirent->d_reclen))
1009 if (copy_to_user(dirent->d_name, name, namlen))
1011 if (__put_user(0, dirent->d_name + namlen))
1013 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
1015 buf->previous = dirent;
1016 dirent = (void __user *)dirent + reclen;
1017 buf->current_dir = dirent;
1018 buf->count -= reclen;
1021 buf->error = -EFAULT;
1025 asmlinkage long compat_sys_getdents(unsigned int fd,
1026 struct compat_linux_dirent __user *dirent, unsigned int count)
1029 struct compat_linux_dirent __user * lastdirent;
1030 struct compat_getdents_callback buf;
1034 if (!access_ok(VERIFY_WRITE, dirent, count))
1042 buf.current_dir = dirent;
1043 buf.previous = NULL;
1047 error = vfs_readdir(file, compat_filldir, &buf);
1051 lastdirent = buf.previous;
1053 if (put_user(file->f_pos, &lastdirent->d_off))
1056 error = count - buf.count;
1065 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
1066 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
1068 struct compat_getdents_callback64 {
1069 struct linux_dirent64 __user *current_dir;
1070 struct linux_dirent64 __user *previous;
1075 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
1076 u64 ino, unsigned int d_type)
1078 struct linux_dirent64 __user *dirent;
1079 struct compat_getdents_callback64 *buf = __buf;
1080 int jj = NAME_OFFSET(dirent);
1081 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
1084 buf->error = -EINVAL; /* only used if we fail.. */
1085 if (reclen > buf->count)
1087 dirent = buf->previous;
1090 if (__put_user_unaligned(offset, &dirent->d_off))
1093 dirent = buf->current_dir;
1094 if (__put_user_unaligned(ino, &dirent->d_ino))
1097 if (__put_user_unaligned(off, &dirent->d_off))
1099 if (__put_user(reclen, &dirent->d_reclen))
1101 if (__put_user(d_type, &dirent->d_type))
1103 if (copy_to_user(dirent->d_name, name, namlen))
1105 if (__put_user(0, dirent->d_name + namlen))
1107 buf->previous = dirent;
1108 dirent = (void __user *)dirent + reclen;
1109 buf->current_dir = dirent;
1110 buf->count -= reclen;
1113 buf->error = -EFAULT;
1117 asmlinkage long compat_sys_getdents64(unsigned int fd,
1118 struct linux_dirent64 __user * dirent, unsigned int count)
1121 struct linux_dirent64 __user * lastdirent;
1122 struct compat_getdents_callback64 buf;
1126 if (!access_ok(VERIFY_WRITE, dirent, count))
1134 buf.current_dir = dirent;
1135 buf.previous = NULL;
1139 error = vfs_readdir(file, compat_filldir64, &buf);
1143 lastdirent = buf.previous;
1145 typeof(lastdirent->d_off) d_off = file->f_pos;
1146 __put_user_unaligned(d_off, &lastdirent->d_off);
1147 error = count - buf.count;
1155 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1157 static ssize_t compat_do_readv_writev(int type, struct file *file,
1158 const struct compat_iovec __user *uvector,
1159 unsigned long nr_segs, loff_t *pos)
1161 compat_ssize_t tot_len;
1162 struct iovec iovstack[UIO_FASTIOV];
1163 struct iovec *iov=iovstack, *vector;
1170 * SuS says "The readv() function *may* fail if the iovcnt argument
1171 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1172 * traditionally returned zero for zero segments, so...
1179 * First get the "struct iovec" from user memory and
1180 * verify all the pointers
1183 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1187 if (nr_segs > UIO_FASTIOV) {
1189 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1194 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1198 * Single unix specification:
1199 * We should -EINVAL if an element length is not >= 0 and fitting an
1200 * ssize_t. The total length is fitting an ssize_t
1202 * Be careful here because iov_len is a size_t not an ssize_t
1207 for (seg = 0 ; seg < nr_segs; seg++) {
1208 compat_ssize_t tmp = tot_len;
1212 if (__get_user(len, &uvector->iov_len) ||
1213 __get_user(buf, &uvector->iov_base)) {
1217 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1220 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1222 vector->iov_base = compat_ptr(buf);
1223 vector->iov_len = (compat_size_t) len;
1232 ret = rw_verify_area(type, file, pos, tot_len);
1236 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1242 fn = file->f_op->read;
1243 fnv = file->f_op->aio_read;
1245 fn = (io_fn_t)file->f_op->write;
1246 fnv = file->f_op->aio_write;
1250 ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
1253 ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
1256 if (iov != iovstack)
1258 if ((ret + (type == READ)) > 0) {
1259 struct dentry *dentry = file->f_dentry;
1261 fsnotify_access(dentry);
1263 fsnotify_modify(dentry);
1269 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1272 ssize_t ret = -EBADF;
1278 if (!(file->f_mode & FMODE_READ))
1282 if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
1285 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1293 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1296 ssize_t ret = -EBADF;
1301 if (!(file->f_mode & FMODE_WRITE))
1305 if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
1308 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1316 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1317 unsigned int nr_segs, unsigned int flags)
1320 struct iovec __user *iov;
1321 if (nr_segs > UIO_MAXIOV)
1323 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1324 for (i = 0; i < nr_segs; i++) {
1325 struct compat_iovec v;
1326 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1327 get_user(v.iov_len, &iov32[i].iov_len) ||
1328 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1329 put_user(v.iov_len, &iov[i].iov_len))
1332 return sys_vmsplice(fd, iov, nr_segs, flags);
1336 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1340 compat_sys_open(const char __user *filename, int flags, int mode)
1342 return do_sys_open(AT_FDCWD, filename, flags, mode);
1346 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1350 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1352 return do_sys_open(dfd, filename, flags, mode);
1356 * compat_count() counts the number of arguments/envelopes. It is basically
1357 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1358 * and envp pointers.
1360 static int compat_count(compat_uptr_t __user *argv, int max)
1368 if (get_user(p, argv))
1381 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1382 * except that it works with 32 bit argv and envp pointers.
1384 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1385 struct linux_binprm *bprm)
1387 struct page *kmapped_page = NULL;
1391 while (argc-- > 0) {
1396 if (get_user(str, argv+argc) ||
1397 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1402 if (bprm->p < len) {
1408 /* XXX: add architecture specific overflow check here. */
1413 int offset, bytes_to_copy;
1416 offset = pos % PAGE_SIZE;
1418 page = bprm->page[i];
1421 page = alloc_page(GFP_HIGHUSER);
1422 bprm->page[i] = page;
1430 if (page != kmapped_page) {
1432 kunmap(kmapped_page);
1433 kmapped_page = page;
1434 kaddr = kmap(kmapped_page);
1437 memset(kaddr, 0, offset);
1438 bytes_to_copy = PAGE_SIZE - offset;
1439 if (bytes_to_copy > len) {
1440 bytes_to_copy = len;
1442 memset(kaddr+offset+len, 0,
1443 PAGE_SIZE-offset-len);
1445 err = copy_from_user(kaddr+offset, compat_ptr(str),
1452 pos += bytes_to_copy;
1453 str += bytes_to_copy;
1454 len -= bytes_to_copy;
1460 kunmap(kmapped_page);
1466 #define free_arg_pages(bprm) do { } while (0)
1470 static inline void free_arg_pages(struct linux_binprm *bprm)
1474 for (i = 0; i < MAX_ARG_PAGES; i++) {
1476 __free_page(bprm->page[i]);
1477 bprm->page[i] = NULL;
1481 #endif /* CONFIG_MMU */
1484 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1485 * that it processes 32 bit argv and envp pointers.
1487 int compat_do_execve(char * filename,
1488 compat_uptr_t __user *argv,
1489 compat_uptr_t __user *envp,
1490 struct pt_regs * regs)
1492 struct linux_binprm *bprm;
1498 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1502 file = open_exec(filename);
1503 retval = PTR_ERR(file);
1509 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1511 bprm->filename = filename;
1512 bprm->interp = filename;
1513 bprm->mm = mm_alloc();
1518 retval = init_new_context(current, bprm->mm);
1522 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1523 if ((retval = bprm->argc) < 0)
1526 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1527 if ((retval = bprm->envc) < 0)
1530 retval = security_bprm_alloc(bprm);
1534 retval = prepare_binprm(bprm);
1538 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1542 bprm->exec = bprm->p;
1543 retval = compat_copy_strings(bprm->envc, envp, bprm);
1547 retval = compat_copy_strings(bprm->argc, argv, bprm);
1551 retval = search_binary_handler(bprm, regs);
1553 free_arg_pages(bprm);
1555 /* execve success */
1556 security_bprm_free(bprm);
1557 acct_update_integrals(current);
1563 /* Something went wrong, return the inode and free the argument pages*/
1564 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1565 struct page * page = bprm->page[i];
1571 security_bprm_free(bprm);
1579 allow_write_access(bprm->file);
1590 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1592 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1595 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1596 * 64-bit unsigned longs.
1599 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1600 unsigned long *fdset)
1602 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1606 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1613 __get_user(l, ufdset);
1614 __get_user(h, ufdset+1);
1616 *fdset++ = h << 32 | l;
1620 __get_user(*fdset, ufdset);
1622 /* Tricky, must clear full unsigned long in the
1623 * kernel fdset at the end, this makes sure that
1626 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1632 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1633 unsigned long *fdset)
1636 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1647 __put_user(l, ufdset);
1648 __put_user(h, ufdset+1);
1653 __put_user(*fdset, ufdset);
1658 * This is a virtual copy of sys_select from fs/select.c and probably
1659 * should be compared to it from time to time
1663 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1664 * like to be certain this leads to no problems. So I return
1665 * EINTR just for safety.
1667 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1668 * I'm trying ERESTARTNOHAND which restart only when you want to.
1670 #define MAX_SELECT_SECONDS \
1671 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1673 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1674 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1678 int size, max_fdset, ret = -EINVAL;
1679 struct fdtable *fdt;
1684 /* max_fdset can increase, so grab it once to avoid race */
1686 fdt = files_fdtable(current->files);
1687 max_fdset = fdt->max_fdset;
1693 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1694 * since we used fdset we need to allocate memory in units of
1698 size = FDS_BYTES(n);
1699 bits = kmalloc(6 * size, GFP_KERNEL);
1702 fds.in = (unsigned long *) bits;
1703 fds.out = (unsigned long *) (bits + size);
1704 fds.ex = (unsigned long *) (bits + 2*size);
1705 fds.res_in = (unsigned long *) (bits + 3*size);
1706 fds.res_out = (unsigned long *) (bits + 4*size);
1707 fds.res_ex = (unsigned long *) (bits + 5*size);
1709 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1710 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1711 (ret = compat_get_fd_set(n, exp, fds.ex)))
1713 zero_fd_set(n, fds.res_in);
1714 zero_fd_set(n, fds.res_out);
1715 zero_fd_set(n, fds.res_ex);
1717 ret = do_select(n, &fds, timeout);
1722 ret = -ERESTARTNOHAND;
1723 if (signal_pending(current))
1728 compat_set_fd_set(n, inp, fds.res_in);
1729 compat_set_fd_set(n, outp, fds.res_out);
1730 compat_set_fd_set(n, exp, fds.res_ex);
1738 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1739 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1740 struct compat_timeval __user *tvp)
1743 struct compat_timeval tv;
1747 if (copy_from_user(&tv, tvp, sizeof(tv)))
1750 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1753 /* Cast to u64 to make GCC stop complaining */
1754 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1755 timeout = -1; /* infinite */
1757 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1758 timeout += tv.tv_sec * HZ;
1762 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1765 struct compat_timeval rtv;
1767 if (current->personality & STICKY_TIMEOUTS)
1769 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1770 rtv.tv_sec = timeout;
1771 if (compat_timeval_compare(&rtv, &tv) >= 0)
1773 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1776 * If an application puts its timeval in read-only
1777 * memory, we don't want the Linux-specific update to
1778 * the timeval to cause a fault after the select has
1779 * completed successfully. However, because we're not
1780 * updating the timeval, we can't restart the system
1783 if (ret == -ERESTARTNOHAND)
1791 #ifdef TIF_RESTORE_SIGMASK
1792 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1793 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1794 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1795 compat_size_t sigsetsize)
1797 compat_sigset_t ss32;
1798 sigset_t ksigmask, sigsaved;
1799 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1800 struct compat_timespec ts;
1804 if (copy_from_user(&ts, tsp, sizeof(ts)))
1807 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1812 if (sigsetsize != sizeof(compat_sigset_t))
1814 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1816 sigset_from_compat(&ksigmask, &ss32);
1818 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1819 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1824 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1825 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1826 timeout += ts.tv_sec * (unsigned long)HZ;
1830 ts.tv_sec -= MAX_SELECT_SECONDS;
1831 timeout = MAX_SELECT_SECONDS * HZ;
1835 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1837 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1840 struct compat_timespec rts;
1842 if (current->personality & STICKY_TIMEOUTS)
1845 rts.tv_sec = timeout / HZ;
1846 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1847 if (rts.tv_nsec >= NSEC_PER_SEC) {
1849 rts.tv_nsec -= NSEC_PER_SEC;
1851 if (compat_timespec_compare(&rts, &ts) >= 0)
1853 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1856 * If an application puts its timeval in read-only
1857 * memory, we don't want the Linux-specific update to
1858 * the timeval to cause a fault after the select has
1859 * completed successfully. However, because we're not
1860 * updating the timeval, we can't restart the system
1863 if (ret == -ERESTARTNOHAND)
1868 if (ret == -ERESTARTNOHAND) {
1870 * Don't restore the signal mask yet. Let do_signal() deliver
1871 * the signal on the way back to userspace, before the signal
1875 memcpy(¤t->saved_sigmask, &sigsaved,
1877 set_thread_flag(TIF_RESTORE_SIGMASK);
1880 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1885 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1886 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1887 struct compat_timespec __user *tsp, void __user *sig)
1889 compat_size_t sigsetsize = 0;
1890 compat_uptr_t up = 0;
1893 if (!access_ok(VERIFY_READ, sig,
1894 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1895 __get_user(up, (compat_uptr_t __user *)sig) ||
1896 __get_user(sigsetsize,
1897 (compat_size_t __user *)(sig+sizeof(up))))
1900 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1904 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1905 unsigned int nfds, struct compat_timespec __user *tsp,
1906 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1908 compat_sigset_t ss32;
1909 sigset_t ksigmask, sigsaved;
1910 struct compat_timespec ts;
1915 if (copy_from_user(&ts, tsp, sizeof(ts)))
1918 /* We assume that ts.tv_sec is always lower than
1919 the number of seconds that can be expressed in
1920 an s64. Otherwise the compiler bitches at us */
1921 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1922 timeout += ts.tv_sec * HZ;
1926 if (sigsetsize != sizeof(compat_sigset_t))
1928 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1930 sigset_from_compat(&ksigmask, &ss32);
1932 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1933 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1936 ret = do_sys_poll(ufds, nfds, &timeout);
1938 /* We can restart this syscall, usually */
1939 if (ret == -EINTR) {
1941 * Don't restore the signal mask yet. Let do_signal() deliver
1942 * the signal on the way back to userspace, before the signal
1946 memcpy(¤t->saved_sigmask, &sigsaved,
1948 set_thread_flag(TIF_RESTORE_SIGMASK);
1950 ret = -ERESTARTNOHAND;
1952 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1954 if (tsp && timeout >= 0) {
1955 struct compat_timespec rts;
1957 if (current->personality & STICKY_TIMEOUTS)
1959 /* Yes, we know it's actually an s64, but it's also positive. */
1960 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1962 rts.tv_sec = timeout;
1963 if (compat_timespec_compare(&rts, &ts) >= 0)
1965 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1968 * If an application puts its timeval in read-only
1969 * memory, we don't want the Linux-specific update to
1970 * the timeval to cause a fault after the select has
1971 * completed successfully. However, because we're not
1972 * updating the timeval, we can't restart the system
1975 if (ret == -ERESTARTNOHAND && timeout >= 0)
1982 #endif /* TIF_RESTORE_SIGMASK */
1984 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1985 /* Stuff for NFS server syscalls... */
1986 struct compat_nfsctl_svc {
1991 struct compat_nfsctl_client {
1992 s8 cl32_ident[NFSCLNT_IDMAX+1];
1994 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1997 u8 cl32_fhkey[NFSCLNT_KEYMAX];
2000 struct compat_nfsctl_export {
2001 char ex32_client[NFSCLNT_IDMAX+1];
2002 char ex32_path[NFS_MAXPATHLEN+1];
2003 compat_dev_t ex32_dev;
2004 compat_ino_t ex32_ino;
2005 compat_int_t ex32_flags;
2006 __compat_uid_t ex32_anon_uid;
2007 __compat_gid_t ex32_anon_gid;
2010 struct compat_nfsctl_fdparm {
2011 struct sockaddr gd32_addr;
2012 s8 gd32_path[NFS_MAXPATHLEN+1];
2013 compat_int_t gd32_version;
2016 struct compat_nfsctl_fsparm {
2017 struct sockaddr gd32_addr;
2018 s8 gd32_path[NFS_MAXPATHLEN+1];
2019 compat_int_t gd32_maxlen;
2022 struct compat_nfsctl_arg {
2023 compat_int_t ca32_version; /* safeguard */
2025 struct compat_nfsctl_svc u32_svc;
2026 struct compat_nfsctl_client u32_client;
2027 struct compat_nfsctl_export u32_export;
2028 struct compat_nfsctl_fdparm u32_getfd;
2029 struct compat_nfsctl_fsparm u32_getfs;
2031 #define ca32_svc u.u32_svc
2032 #define ca32_client u.u32_client
2033 #define ca32_export u.u32_export
2034 #define ca32_getfd u.u32_getfd
2035 #define ca32_getfs u.u32_getfs
2038 union compat_nfsctl_res {
2039 __u8 cr32_getfh[NFS_FHSIZE];
2040 struct knfsd_fh cr32_getfs;
2043 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2044 struct compat_nfsctl_arg __user *arg)
2046 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2047 get_user(karg->ca_version, &arg->ca32_version) ||
2048 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2049 __get_user(karg->ca_svc.svc_nthreads,
2050 &arg->ca32_svc.svc32_nthreads))
2055 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2056 struct compat_nfsctl_arg __user *arg)
2058 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2059 sizeof(arg->ca32_client)) ||
2060 get_user(karg->ca_version, &arg->ca32_version) ||
2061 __copy_from_user(&karg->ca_client.cl_ident[0],
2062 &arg->ca32_client.cl32_ident[0],
2064 __get_user(karg->ca_client.cl_naddr,
2065 &arg->ca32_client.cl32_naddr) ||
2066 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2067 &arg->ca32_client.cl32_addrlist[0],
2068 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2069 __get_user(karg->ca_client.cl_fhkeytype,
2070 &arg->ca32_client.cl32_fhkeytype) ||
2071 __get_user(karg->ca_client.cl_fhkeylen,
2072 &arg->ca32_client.cl32_fhkeylen) ||
2073 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2074 &arg->ca32_client.cl32_fhkey[0],
2081 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2082 struct compat_nfsctl_arg __user *arg)
2084 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2085 sizeof(arg->ca32_export)) ||
2086 get_user(karg->ca_version, &arg->ca32_version) ||
2087 __copy_from_user(&karg->ca_export.ex_client[0],
2088 &arg->ca32_export.ex32_client[0],
2090 __copy_from_user(&karg->ca_export.ex_path[0],
2091 &arg->ca32_export.ex32_path[0],
2093 __get_user(karg->ca_export.ex_dev,
2094 &arg->ca32_export.ex32_dev) ||
2095 __get_user(karg->ca_export.ex_ino,
2096 &arg->ca32_export.ex32_ino) ||
2097 __get_user(karg->ca_export.ex_flags,
2098 &arg->ca32_export.ex32_flags) ||
2099 __get_user(karg->ca_export.ex_anon_uid,
2100 &arg->ca32_export.ex32_anon_uid) ||
2101 __get_user(karg->ca_export.ex_anon_gid,
2102 &arg->ca32_export.ex32_anon_gid))
2104 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2105 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2110 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2111 struct compat_nfsctl_arg __user *arg)
2113 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2114 sizeof(arg->ca32_getfd)) ||
2115 get_user(karg->ca_version, &arg->ca32_version) ||
2116 __copy_from_user(&karg->ca_getfd.gd_addr,
2117 &arg->ca32_getfd.gd32_addr,
2118 (sizeof(struct sockaddr))) ||
2119 __copy_from_user(&karg->ca_getfd.gd_path,
2120 &arg->ca32_getfd.gd32_path,
2121 (NFS_MAXPATHLEN+1)) ||
2122 __get_user(karg->ca_getfd.gd_version,
2123 &arg->ca32_getfd.gd32_version))
2129 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2130 struct compat_nfsctl_arg __user *arg)
2132 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2133 get_user(karg->ca_version, &arg->ca32_version) ||
2134 __copy_from_user(&karg->ca_getfs.gd_addr,
2135 &arg->ca32_getfs.gd32_addr,
2136 (sizeof(struct sockaddr))) ||
2137 __copy_from_user(&karg->ca_getfs.gd_path,
2138 &arg->ca32_getfs.gd32_path,
2139 (NFS_MAXPATHLEN+1)) ||
2140 __get_user(karg->ca_getfs.gd_maxlen,
2141 &arg->ca32_getfs.gd32_maxlen))
2147 /* This really doesn't need translations, we are only passing
2148 * back a union which contains opaque nfs file handle data.
2150 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2151 union compat_nfsctl_res __user *res)
2155 err = copy_to_user(res, kres, sizeof(*res));
2157 return (err) ? -EFAULT : 0;
2160 asmlinkage long compat_sys_nfsservctl(int cmd,
2161 struct compat_nfsctl_arg __user *arg,
2162 union compat_nfsctl_res __user *res)
2164 struct nfsctl_arg *karg;
2165 union nfsctl_res *kres;
2169 karg = kmalloc(sizeof(*karg), GFP_USER);
2170 kres = kmalloc(sizeof(*kres), GFP_USER);
2171 if(!karg || !kres) {
2178 err = compat_nfs_svc_trans(karg, arg);
2181 case NFSCTL_ADDCLIENT:
2182 err = compat_nfs_clnt_trans(karg, arg);
2185 case NFSCTL_DELCLIENT:
2186 err = compat_nfs_clnt_trans(karg, arg);
2190 case NFSCTL_UNEXPORT:
2191 err = compat_nfs_exp_trans(karg, arg);
2195 err = compat_nfs_getfd_trans(karg, arg);
2199 err = compat_nfs_getfs_trans(karg, arg);
2212 /* The __user pointer casts are valid because of the set_fs() */
2213 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2219 if((cmd == NFSCTL_GETFD) ||
2220 (cmd == NFSCTL_GETFS))
2221 err = compat_nfs_getfh_res_trans(kres, res);
2229 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2231 return sys_ni_syscall();