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/acct.h>
50 #include <net/sock.h> /* siocdevprivate_ioctl */
52 #include <asm/uaccess.h>
53 #include <asm/mmu_context.h>
54 #include <asm/ioctls.h>
56 extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);
60 int compat_printk(const char *fmt, ...)
67 ret = vprintk(fmt, ap);
73 * Not all architectures have sys_utime, so implement this in terms
76 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
81 if (get_user(tv[0].tv_sec, &t->actime) ||
82 get_user(tv[1].tv_sec, &t->modtime))
87 return do_utimes(AT_FDCWD, filename, t ? tv : NULL);
90 asmlinkage long compat_sys_futimesat(unsigned int dfd, char __user *filename, struct compat_timeval __user *t)
95 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
96 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
97 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
98 get_user(tv[1].tv_usec, &t[1].tv_usec))
101 return do_utimes(dfd, filename, t ? tv : NULL);
104 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
106 return compat_sys_futimesat(AT_FDCWD, filename, t);
109 asmlinkage long compat_sys_newstat(char __user * filename,
110 struct compat_stat __user *statbuf)
113 int error = vfs_stat_fd(AT_FDCWD, filename, &stat);
116 error = cp_compat_stat(&stat, statbuf);
120 asmlinkage long compat_sys_newlstat(char __user * filename,
121 struct compat_stat __user *statbuf)
124 int error = vfs_lstat_fd(AT_FDCWD, filename, &stat);
127 error = cp_compat_stat(&stat, statbuf);
131 #ifndef __ARCH_WANT_STAT64
132 asmlinkage long compat_sys_newfstatat(unsigned int dfd, char __user *filename,
133 struct compat_stat __user *statbuf, int flag)
138 if ((flag & ~AT_SYMLINK_NOFOLLOW) != 0)
141 if (flag & AT_SYMLINK_NOFOLLOW)
142 error = vfs_lstat_fd(dfd, filename, &stat);
144 error = vfs_stat_fd(dfd, filename, &stat);
147 error = cp_compat_stat(&stat, statbuf);
154 asmlinkage long compat_sys_newfstat(unsigned int fd,
155 struct compat_stat __user * statbuf)
158 int error = vfs_fstat(fd, &stat);
161 error = cp_compat_stat(&stat, statbuf);
165 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
168 if (sizeof ubuf->f_blocks == 4) {
169 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
170 0xffffffff00000000ULL)
172 /* f_files and f_ffree may be -1; it's okay
173 * to stuff that into 32 bits */
174 if (kbuf->f_files != 0xffffffffffffffffULL
175 && (kbuf->f_files & 0xffffffff00000000ULL))
177 if (kbuf->f_ffree != 0xffffffffffffffffULL
178 && (kbuf->f_ffree & 0xffffffff00000000ULL))
181 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
182 __put_user(kbuf->f_type, &ubuf->f_type) ||
183 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
184 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
185 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
186 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
187 __put_user(kbuf->f_files, &ubuf->f_files) ||
188 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
189 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
190 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
191 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
192 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
193 __put_user(0, &ubuf->f_spare[0]) ||
194 __put_user(0, &ubuf->f_spare[1]) ||
195 __put_user(0, &ubuf->f_spare[2]) ||
196 __put_user(0, &ubuf->f_spare[3]) ||
197 __put_user(0, &ubuf->f_spare[4]))
203 * The following statfs calls are copies of code from fs/open.c and
204 * should be checked against those from time to time
206 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
211 error = user_path_walk(path, &nd);
214 error = vfs_statfs(nd.dentry, &tmp);
216 error = put_compat_statfs(buf, &tmp);
222 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
232 error = vfs_statfs(file->f_dentry, &tmp);
234 error = put_compat_statfs(buf, &tmp);
240 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
242 if (sizeof ubuf->f_blocks == 4) {
243 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
244 0xffffffff00000000ULL)
246 /* f_files and f_ffree may be -1; it's okay
247 * to stuff that into 32 bits */
248 if (kbuf->f_files != 0xffffffffffffffffULL
249 && (kbuf->f_files & 0xffffffff00000000ULL))
251 if (kbuf->f_ffree != 0xffffffffffffffffULL
252 && (kbuf->f_ffree & 0xffffffff00000000ULL))
255 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
256 __put_user(kbuf->f_type, &ubuf->f_type) ||
257 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
258 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
259 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
260 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
261 __put_user(kbuf->f_files, &ubuf->f_files) ||
262 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
263 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
264 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
265 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
266 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
271 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
276 if (sz != sizeof(*buf))
279 error = user_path_walk(path, &nd);
282 error = vfs_statfs(nd.dentry, &tmp);
284 error = put_compat_statfs64(buf, &tmp);
290 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
296 if (sz != sizeof(*buf))
303 error = vfs_statfs(file->f_dentry, &tmp);
305 error = put_compat_statfs64(buf, &tmp);
311 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
313 #define IOCTL_HASHSIZE 256
314 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
316 extern struct ioctl_trans ioctl_start[];
317 extern int ioctl_table_size;
319 static inline unsigned long ioctl32_hash(unsigned long cmd)
321 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
324 static void ioctl32_insert_translation(struct ioctl_trans *trans)
327 struct ioctl_trans *t;
329 hash = ioctl32_hash (trans->cmd);
330 if (!ioctl32_hash_table[hash])
331 ioctl32_hash_table[hash] = trans;
333 t = ioctl32_hash_table[hash];
341 static int __init init_sys32_ioctl(void)
345 for (i = 0; i < ioctl_table_size; i++) {
346 if (ioctl_start[i].next != 0) {
347 printk("ioctl translation %d bad\n",i);
351 ioctl32_insert_translation(&ioctl_start[i]);
356 __initcall(init_sys32_ioctl);
358 static void compat_ioctl_error(struct file *filp, unsigned int fd,
359 unsigned int cmd, unsigned long arg)
365 /* find the name of the device. */
366 path = (char *)__get_free_page(GFP_KERNEL);
368 fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
373 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
374 if (!isprint(buf[1]))
375 sprintf(buf, "%02x", buf[1]);
376 compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
377 "cmd(%08x){%s} arg(%08x) on %s\n",
378 current->comm, current->pid,
379 (int)fd, (unsigned int)cmd, buf,
380 (unsigned int)arg, fn);
383 free_page((unsigned long)path);
386 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
391 struct ioctl_trans *t;
394 filp = fget_light(fd, &fput_needed);
398 /* RED-PEN how should LSM module know it's handling 32bit? */
399 error = security_file_ioctl(filp, cmd, arg);
404 * To allow the compat_ioctl handlers to be self contained
405 * we need to check the common ioctls here first.
406 * Just handle them with the standard handlers below.
419 if (S_ISREG(filp->f_dentry->d_inode->i_mode))
424 if (filp->f_op && filp->f_op->compat_ioctl) {
425 error = filp->f_op->compat_ioctl(filp, cmd, arg);
426 if (error != -ENOIOCTLCMD)
431 (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
436 for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
441 if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
442 cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
443 error = siocdevprivate_ioctl(fd, cmd, arg);
448 compat_ioctl_error(filp, fd, cmd, arg);
457 error = t->handler(fd, cmd, arg, filp);
463 error = vfs_ioctl(filp, fd, cmd, arg);
465 fput_light(filp, fput_needed);
470 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
472 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
473 __get_user(kfl->l_type, &ufl->l_type) ||
474 __get_user(kfl->l_whence, &ufl->l_whence) ||
475 __get_user(kfl->l_start, &ufl->l_start) ||
476 __get_user(kfl->l_len, &ufl->l_len) ||
477 __get_user(kfl->l_pid, &ufl->l_pid))
482 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
484 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
485 __put_user(kfl->l_type, &ufl->l_type) ||
486 __put_user(kfl->l_whence, &ufl->l_whence) ||
487 __put_user(kfl->l_start, &ufl->l_start) ||
488 __put_user(kfl->l_len, &ufl->l_len) ||
489 __put_user(kfl->l_pid, &ufl->l_pid))
494 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
495 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
497 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
498 __get_user(kfl->l_type, &ufl->l_type) ||
499 __get_user(kfl->l_whence, &ufl->l_whence) ||
500 __get_user(kfl->l_start, &ufl->l_start) ||
501 __get_user(kfl->l_len, &ufl->l_len) ||
502 __get_user(kfl->l_pid, &ufl->l_pid))
508 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
509 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
511 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
512 __put_user(kfl->l_type, &ufl->l_type) ||
513 __put_user(kfl->l_whence, &ufl->l_whence) ||
514 __put_user(kfl->l_start, &ufl->l_start) ||
515 __put_user(kfl->l_len, &ufl->l_len) ||
516 __put_user(kfl->l_pid, &ufl->l_pid))
522 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
533 ret = get_compat_flock(&f, compat_ptr(arg));
538 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
540 if (cmd == F_GETLK && ret == 0) {
541 /* GETLK was successfule and we need to return the data...
542 * but it needs to fit in the compat structure.
543 * l_start shouldn't be too big, unless the original
544 * start + end is greater than COMPAT_OFF_T_MAX, in which
545 * case the app was asking for trouble, so we return
546 * -EOVERFLOW in that case.
547 * l_len could be too big, in which case we just truncate it,
548 * and only allow the app to see that part of the conflicting
549 * lock that might make sense to it anyway
552 if (f.l_start > COMPAT_OFF_T_MAX)
554 if (f.l_len > COMPAT_OFF_T_MAX)
555 f.l_len = COMPAT_OFF_T_MAX;
557 ret = put_compat_flock(&f, compat_ptr(arg));
564 ret = get_compat_flock64(&f, compat_ptr(arg));
569 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
570 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
573 if (cmd == F_GETLK64 && ret == 0) {
574 /* need to return lock information - see above for commentary */
575 if (f.l_start > COMPAT_LOFF_T_MAX)
577 if (f.l_len > COMPAT_LOFF_T_MAX)
578 f.l_len = COMPAT_LOFF_T_MAX;
580 ret = put_compat_flock64(&f, compat_ptr(arg));
585 ret = sys_fcntl(fd, cmd, arg);
591 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
594 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
596 return compat_sys_fcntl64(fd, cmd, arg);
600 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
605 mm_segment_t oldfs = get_fs();
606 if (unlikely(get_user(ctx64, ctx32p)))
610 /* The __user pointer cast is valid because of the set_fs() */
611 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
613 /* truncating is ok because it's a user address */
615 ret = put_user((u32) ctx64, ctx32p);
620 compat_sys_io_getevents(aio_context_t ctx_id,
621 unsigned long min_nr,
623 struct io_event __user *events,
624 struct compat_timespec __user *timeout)
628 struct timespec __user *ut = NULL;
631 if (unlikely(!access_ok(VERIFY_WRITE, events,
632 nr * sizeof(struct io_event))))
635 if (get_compat_timespec(&t, timeout))
638 ut = compat_alloc_user_space(sizeof(*ut));
639 if (copy_to_user(ut, &t, sizeof(t)) )
642 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
648 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
653 for (i = 0; i < nr; ++i) {
654 if (get_user(uptr, ptr32 + i))
656 if (put_user(compat_ptr(uptr), ptr64 + i))
662 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
665 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
667 struct iocb __user * __user *iocb64;
670 if (unlikely(nr < 0))
673 if (nr > MAX_AIO_SUBMITS)
674 nr = MAX_AIO_SUBMITS;
676 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
677 ret = copy_iocb(nr, iocb, iocb64);
679 ret = sys_io_submit(ctx_id, nr, iocb64);
683 struct compat_ncp_mount_data {
684 compat_int_t version;
685 compat_uint_t ncp_fd;
686 __compat_uid_t mounted_uid;
687 compat_pid_t wdog_pid;
688 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
689 compat_uint_t time_out;
690 compat_uint_t retry_count;
694 compat_mode_t file_mode;
695 compat_mode_t dir_mode;
698 struct compat_ncp_mount_data_v4 {
699 compat_int_t version;
700 compat_ulong_t flags;
701 compat_ulong_t mounted_uid;
702 compat_long_t wdog_pid;
703 compat_uint_t ncp_fd;
704 compat_uint_t time_out;
705 compat_uint_t retry_count;
708 compat_ulong_t file_mode;
709 compat_ulong_t dir_mode;
712 static void *do_ncp_super_data_conv(void *raw_data)
714 int version = *(unsigned int *)raw_data;
717 struct compat_ncp_mount_data *c_n = raw_data;
718 struct ncp_mount_data *n = raw_data;
720 n->dir_mode = c_n->dir_mode;
721 n->file_mode = c_n->file_mode;
724 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
725 n->wdog_pid = c_n->wdog_pid;
726 n->mounted_uid = c_n->mounted_uid;
727 } else if (version == 4) {
728 struct compat_ncp_mount_data_v4 *c_n = raw_data;
729 struct ncp_mount_data_v4 *n = raw_data;
731 n->dir_mode = c_n->dir_mode;
732 n->file_mode = c_n->file_mode;
735 n->retry_count = c_n->retry_count;
736 n->time_out = c_n->time_out;
737 n->ncp_fd = c_n->ncp_fd;
738 n->wdog_pid = c_n->wdog_pid;
739 n->mounted_uid = c_n->mounted_uid;
740 n->flags = c_n->flags;
741 } else if (version != 5) {
748 struct compat_smb_mount_data {
749 compat_int_t version;
750 __compat_uid_t mounted_uid;
753 compat_mode_t file_mode;
754 compat_mode_t dir_mode;
757 static void *do_smb_super_data_conv(void *raw_data)
759 struct smb_mount_data *s = raw_data;
760 struct compat_smb_mount_data *c_s = raw_data;
762 if (c_s->version != SMB_MOUNT_OLDVERSION)
764 s->dir_mode = c_s->dir_mode;
765 s->file_mode = c_s->file_mode;
768 s->mounted_uid = c_s->mounted_uid;
773 struct compat_nfs_string {
778 static inline void compat_nfs_string(struct nfs_string *dst,
779 struct compat_nfs_string *src)
781 dst->data = compat_ptr(src->data);
785 struct compat_nfs4_mount_data_v1 {
786 compat_int_t version;
791 compat_int_t retrans;
792 compat_int_t acregmin;
793 compat_int_t acregmax;
794 compat_int_t acdirmin;
795 compat_int_t acdirmax;
796 struct compat_nfs_string client_addr;
797 struct compat_nfs_string mnt_path;
798 struct compat_nfs_string hostname;
799 compat_uint_t host_addrlen;
800 compat_uptr_t host_addr;
802 compat_int_t auth_flavourlen;
803 compat_uptr_t auth_flavours;
806 static int do_nfs4_super_data_conv(void *raw_data)
808 int version = *(compat_uint_t *) raw_data;
811 struct compat_nfs4_mount_data_v1 *raw = raw_data;
812 struct nfs4_mount_data *real = raw_data;
814 /* copy the fields backwards */
815 real->auth_flavours = compat_ptr(raw->auth_flavours);
816 real->auth_flavourlen = raw->auth_flavourlen;
817 real->proto = raw->proto;
818 real->host_addr = compat_ptr(raw->host_addr);
819 real->host_addrlen = raw->host_addrlen;
820 compat_nfs_string(&real->hostname, &raw->hostname);
821 compat_nfs_string(&real->mnt_path, &raw->mnt_path);
822 compat_nfs_string(&real->client_addr, &raw->client_addr);
823 real->acdirmax = raw->acdirmax;
824 real->acdirmin = raw->acdirmin;
825 real->acregmax = raw->acregmax;
826 real->acregmin = raw->acregmin;
827 real->retrans = raw->retrans;
828 real->timeo = raw->timeo;
829 real->wsize = raw->wsize;
830 real->rsize = raw->rsize;
831 real->flags = raw->flags;
832 real->version = raw->version;
841 extern int copy_mount_options (const void __user *, unsigned long *);
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);
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;
1149 __put_user_unaligned(d_off, &lastdirent->d_off);
1150 error = count - buf.count;
1158 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1160 static ssize_t compat_do_readv_writev(int type, struct file *file,
1161 const struct compat_iovec __user *uvector,
1162 unsigned long nr_segs, loff_t *pos)
1164 typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
1165 typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
1167 compat_ssize_t tot_len;
1168 struct iovec iovstack[UIO_FASTIOV];
1169 struct iovec *iov=iovstack, *vector;
1176 * SuS says "The readv() function *may* fail if the iovcnt argument
1177 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1178 * traditionally returned zero for zero segments, so...
1185 * First get the "struct iovec" from user memory and
1186 * verify all the pointers
1189 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1193 if (nr_segs > UIO_FASTIOV) {
1195 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1200 if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1204 * Single unix specification:
1205 * We should -EINVAL if an element length is not >= 0 and fitting an
1206 * ssize_t. The total length is fitting an ssize_t
1208 * Be careful here because iov_len is a size_t not an ssize_t
1213 for (seg = 0 ; seg < nr_segs; seg++) {
1214 compat_ssize_t tmp = tot_len;
1218 if (__get_user(len, &uvector->iov_len) ||
1219 __get_user(buf, &uvector->iov_base)) {
1223 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1226 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1228 vector->iov_base = compat_ptr(buf);
1229 vector->iov_len = (compat_size_t) len;
1238 ret = rw_verify_area(type, file, pos, tot_len);
1242 ret = security_file_permission(file, type == READ ? MAY_READ:MAY_WRITE);
1248 fn = file->f_op->read;
1249 fnv = file->f_op->readv;
1251 fn = (io_fn_t)file->f_op->write;
1252 fnv = file->f_op->writev;
1255 ret = fnv(file, iov, nr_segs, pos);
1259 /* Do it by hand, with file-ops */
1262 while (nr_segs > 0) {
1267 base = vector->iov_base;
1268 len = vector->iov_len;
1272 nr = fn(file, base, len, pos);
1283 if (iov != iovstack)
1285 if ((ret + (type == READ)) > 0) {
1286 struct dentry *dentry = file->f_dentry;
1288 fsnotify_access(dentry);
1290 fsnotify_modify(dentry);
1296 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1299 ssize_t ret = -EBADF;
1305 if (!(file->f_mode & FMODE_READ))
1309 if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
1312 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1320 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1323 ssize_t ret = -EBADF;
1328 if (!(file->f_mode & FMODE_WRITE))
1332 if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
1335 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1343 compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
1344 unsigned int nr_segs, unsigned int flags)
1348 if (nr_segs > UIO_MAXIOV)
1350 iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
1351 for (i = 0; i < nr_segs; i++) {
1352 struct compat_iovec v;
1353 if (get_user(v.iov_base, &iov32[i].iov_base) ||
1354 get_user(v.iov_len, &iov32[i].iov_len) ||
1355 put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
1356 put_user(v.iov_len, &iov[i].iov_len))
1359 return sys_vmsplice(fd, iov, nr_segs, flags);
1363 * Exactly like fs/open.c:sys_open(), except that it doesn't set the
1367 compat_sys_open(const char __user *filename, int flags, int mode)
1369 return do_sys_open(AT_FDCWD, filename, flags, mode);
1373 * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
1377 compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
1379 return do_sys_open(dfd, filename, flags, mode);
1383 * compat_count() counts the number of arguments/envelopes. It is basically
1384 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1385 * and envp pointers.
1387 static int compat_count(compat_uptr_t __user *argv, int max)
1395 if (get_user(p, argv))
1408 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1409 * except that it works with 32 bit argv and envp pointers.
1411 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1412 struct linux_binprm *bprm)
1414 struct page *kmapped_page = NULL;
1418 while (argc-- > 0) {
1423 if (get_user(str, argv+argc) ||
1424 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1429 if (bprm->p < len) {
1435 /* XXX: add architecture specific overflow check here. */
1440 int offset, bytes_to_copy;
1443 offset = pos % PAGE_SIZE;
1445 page = bprm->page[i];
1448 page = alloc_page(GFP_HIGHUSER);
1449 bprm->page[i] = page;
1457 if (page != kmapped_page) {
1459 kunmap(kmapped_page);
1460 kmapped_page = page;
1461 kaddr = kmap(kmapped_page);
1464 memset(kaddr, 0, offset);
1465 bytes_to_copy = PAGE_SIZE - offset;
1466 if (bytes_to_copy > len) {
1467 bytes_to_copy = len;
1469 memset(kaddr+offset+len, 0,
1470 PAGE_SIZE-offset-len);
1472 err = copy_from_user(kaddr+offset, compat_ptr(str),
1479 pos += bytes_to_copy;
1480 str += bytes_to_copy;
1481 len -= bytes_to_copy;
1487 kunmap(kmapped_page);
1493 #define free_arg_pages(bprm) do { } while (0)
1497 static inline void free_arg_pages(struct linux_binprm *bprm)
1501 for (i = 0; i < MAX_ARG_PAGES; i++) {
1503 __free_page(bprm->page[i]);
1504 bprm->page[i] = NULL;
1508 #endif /* CONFIG_MMU */
1511 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1512 * that it processes 32 bit argv and envp pointers.
1514 int compat_do_execve(char * filename,
1515 compat_uptr_t __user *argv,
1516 compat_uptr_t __user *envp,
1517 struct pt_regs * regs)
1519 struct linux_binprm *bprm;
1525 bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
1529 file = open_exec(filename);
1530 retval = PTR_ERR(file);
1536 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1538 bprm->filename = filename;
1539 bprm->interp = filename;
1540 bprm->mm = mm_alloc();
1545 retval = init_new_context(current, bprm->mm);
1549 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1550 if ((retval = bprm->argc) < 0)
1553 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1554 if ((retval = bprm->envc) < 0)
1557 retval = security_bprm_alloc(bprm);
1561 retval = prepare_binprm(bprm);
1565 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1569 bprm->exec = bprm->p;
1570 retval = compat_copy_strings(bprm->envc, envp, bprm);
1574 retval = compat_copy_strings(bprm->argc, argv, bprm);
1578 retval = search_binary_handler(bprm, regs);
1580 free_arg_pages(bprm);
1582 /* execve success */
1583 security_bprm_free(bprm);
1584 acct_update_integrals(current);
1590 /* Something went wrong, return the inode and free the argument pages*/
1591 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1592 struct page * page = bprm->page[i];
1598 security_bprm_free(bprm);
1606 allow_write_access(bprm->file);
1617 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1619 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1622 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1623 * 64-bit unsigned longs.
1626 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1627 unsigned long *fdset)
1629 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1633 if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1640 __get_user(l, ufdset);
1641 __get_user(h, ufdset+1);
1643 *fdset++ = h << 32 | l;
1647 __get_user(*fdset, ufdset);
1649 /* Tricky, must clear full unsigned long in the
1650 * kernel fdset at the end, this makes sure that
1653 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1659 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1660 unsigned long *fdset)
1663 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1674 __put_user(l, ufdset);
1675 __put_user(h, ufdset+1);
1680 __put_user(*fdset, ufdset);
1685 * This is a virtual copy of sys_select from fs/select.c and probably
1686 * should be compared to it from time to time
1690 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1691 * like to be certain this leads to no problems. So I return
1692 * EINTR just for safety.
1694 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1695 * I'm trying ERESTARTNOHAND which restart only when you want to.
1697 #define MAX_SELECT_SECONDS \
1698 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1700 int compat_core_sys_select(int n, compat_ulong_t __user *inp,
1701 compat_ulong_t __user *outp, compat_ulong_t __user *exp, s64 *timeout)
1705 int size, max_fdset, ret = -EINVAL;
1706 struct fdtable *fdt;
1711 /* max_fdset can increase, so grab it once to avoid race */
1713 fdt = files_fdtable(current->files);
1714 max_fdset = fdt->max_fdset;
1720 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1721 * since we used fdset we need to allocate memory in units of
1725 size = FDS_BYTES(n);
1726 bits = kmalloc(6 * size, GFP_KERNEL);
1729 fds.in = (unsigned long *) bits;
1730 fds.out = (unsigned long *) (bits + size);
1731 fds.ex = (unsigned long *) (bits + 2*size);
1732 fds.res_in = (unsigned long *) (bits + 3*size);
1733 fds.res_out = (unsigned long *) (bits + 4*size);
1734 fds.res_ex = (unsigned long *) (bits + 5*size);
1736 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1737 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1738 (ret = compat_get_fd_set(n, exp, fds.ex)))
1740 zero_fd_set(n, fds.res_in);
1741 zero_fd_set(n, fds.res_out);
1742 zero_fd_set(n, fds.res_ex);
1744 ret = do_select(n, &fds, timeout);
1749 ret = -ERESTARTNOHAND;
1750 if (signal_pending(current))
1755 compat_set_fd_set(n, inp, fds.res_in);
1756 compat_set_fd_set(n, outp, fds.res_out);
1757 compat_set_fd_set(n, exp, fds.res_ex);
1765 asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
1766 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1767 struct compat_timeval __user *tvp)
1770 struct compat_timeval tv;
1774 if (copy_from_user(&tv, tvp, sizeof(tv)))
1777 if (tv.tv_sec < 0 || tv.tv_usec < 0)
1780 /* Cast to u64 to make GCC stop complaining */
1781 if ((u64)tv.tv_sec >= (u64)MAX_INT64_SECONDS)
1782 timeout = -1; /* infinite */
1784 timeout = ROUND_UP(tv.tv_usec, 1000000/HZ);
1785 timeout += tv.tv_sec * HZ;
1789 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1792 struct compat_timeval rtv;
1794 if (current->personality & STICKY_TIMEOUTS)
1796 rtv.tv_usec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ));
1797 rtv.tv_sec = timeout;
1798 if (compat_timeval_compare(&rtv, &tv) >= 0)
1800 if (copy_to_user(tvp, &rtv, sizeof(rtv))) {
1803 * If an application puts its timeval in read-only
1804 * memory, we don't want the Linux-specific update to
1805 * the timeval to cause a fault after the select has
1806 * completed successfully. However, because we're not
1807 * updating the timeval, we can't restart the system
1810 if (ret == -ERESTARTNOHAND)
1818 #ifdef TIF_RESTORE_SIGMASK
1819 asmlinkage long compat_sys_pselect7(int n, compat_ulong_t __user *inp,
1820 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1821 struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
1822 compat_size_t sigsetsize)
1824 compat_sigset_t ss32;
1825 sigset_t ksigmask, sigsaved;
1826 s64 timeout = MAX_SCHEDULE_TIMEOUT;
1827 struct compat_timespec ts;
1831 if (copy_from_user(&ts, tsp, sizeof(ts)))
1834 if (ts.tv_sec < 0 || ts.tv_nsec < 0)
1839 if (sigsetsize != sizeof(compat_sigset_t))
1841 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1843 sigset_from_compat(&ksigmask, &ss32);
1845 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1846 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1851 if ((unsigned long)ts.tv_sec < MAX_SELECT_SECONDS) {
1852 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1853 timeout += ts.tv_sec * (unsigned long)HZ;
1857 ts.tv_sec -= MAX_SELECT_SECONDS;
1858 timeout = MAX_SELECT_SECONDS * HZ;
1862 ret = compat_core_sys_select(n, inp, outp, exp, &timeout);
1864 } while (!ret && !timeout && tsp && (ts.tv_sec || ts.tv_nsec));
1866 if (tsp && !(current->personality & STICKY_TIMEOUTS)) {
1867 struct compat_timespec rts;
1869 rts.tv_sec = timeout / HZ;
1870 rts.tv_nsec = (timeout % HZ) * (NSEC_PER_SEC/HZ);
1871 if (rts.tv_nsec >= NSEC_PER_SEC) {
1873 rts.tv_nsec -= NSEC_PER_SEC;
1875 if (compat_timespec_compare(&rts, &ts) >= 0)
1877 copy_to_user(tsp, &rts, sizeof(rts));
1880 if (ret == -ERESTARTNOHAND) {
1882 * Don't restore the signal mask yet. Let do_signal() deliver
1883 * the signal on the way back to userspace, before the signal
1887 memcpy(¤t->saved_sigmask, &sigsaved,
1889 set_thread_flag(TIF_RESTORE_SIGMASK);
1892 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1897 asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
1898 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
1899 struct compat_timespec __user *tsp, void __user *sig)
1901 compat_size_t sigsetsize = 0;
1902 compat_uptr_t up = 0;
1905 if (!access_ok(VERIFY_READ, sig,
1906 sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
1907 __get_user(up, (compat_uptr_t __user *)sig) ||
1908 __get_user(sigsetsize,
1909 (compat_size_t __user *)(sig+sizeof(up))))
1912 return compat_sys_pselect7(n, inp, outp, exp, tsp, compat_ptr(up),
1916 asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
1917 unsigned int nfds, struct compat_timespec __user *tsp,
1918 const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
1920 compat_sigset_t ss32;
1921 sigset_t ksigmask, sigsaved;
1922 struct compat_timespec ts;
1927 if (copy_from_user(&ts, tsp, sizeof(ts)))
1930 /* We assume that ts.tv_sec is always lower than
1931 the number of seconds that can be expressed in
1932 an s64. Otherwise the compiler bitches at us */
1933 timeout = ROUND_UP(ts.tv_nsec, 1000000000/HZ);
1934 timeout += ts.tv_sec * HZ;
1938 if (sigsetsize != sizeof(compat_sigset_t))
1940 if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
1942 sigset_from_compat(&ksigmask, &ss32);
1944 sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
1945 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
1948 ret = do_sys_poll(ufds, nfds, &timeout);
1950 /* We can restart this syscall, usually */
1951 if (ret == -EINTR) {
1953 * Don't restore the signal mask yet. Let do_signal() deliver
1954 * the signal on the way back to userspace, before the signal
1958 memcpy(¤t->saved_sigmask, &sigsaved,
1960 set_thread_flag(TIF_RESTORE_SIGMASK);
1962 ret = -ERESTARTNOHAND;
1964 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
1966 if (tsp && timeout >= 0) {
1967 struct compat_timespec rts;
1969 if (current->personality & STICKY_TIMEOUTS)
1971 /* Yes, we know it's actually an s64, but it's also positive. */
1972 rts.tv_nsec = jiffies_to_usecs(do_div((*(u64*)&timeout), HZ)) *
1974 rts.tv_sec = timeout;
1975 if (compat_timespec_compare(&rts, &ts) >= 0)
1977 if (copy_to_user(tsp, &rts, sizeof(rts))) {
1980 * If an application puts its timeval in read-only
1981 * memory, we don't want the Linux-specific update to
1982 * the timeval to cause a fault after the select has
1983 * completed successfully. However, because we're not
1984 * updating the timeval, we can't restart the system
1987 if (ret == -ERESTARTNOHAND && timeout >= 0)
1994 #endif /* TIF_RESTORE_SIGMASK */
1996 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1997 /* Stuff for NFS server syscalls... */
1998 struct compat_nfsctl_svc {
2003 struct compat_nfsctl_client {
2004 s8 cl32_ident[NFSCLNT_IDMAX+1];
2006 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
2009 u8 cl32_fhkey[NFSCLNT_KEYMAX];
2012 struct compat_nfsctl_export {
2013 char ex32_client[NFSCLNT_IDMAX+1];
2014 char ex32_path[NFS_MAXPATHLEN+1];
2015 compat_dev_t ex32_dev;
2016 compat_ino_t ex32_ino;
2017 compat_int_t ex32_flags;
2018 __compat_uid_t ex32_anon_uid;
2019 __compat_gid_t ex32_anon_gid;
2022 struct compat_nfsctl_fdparm {
2023 struct sockaddr gd32_addr;
2024 s8 gd32_path[NFS_MAXPATHLEN+1];
2025 compat_int_t gd32_version;
2028 struct compat_nfsctl_fsparm {
2029 struct sockaddr gd32_addr;
2030 s8 gd32_path[NFS_MAXPATHLEN+1];
2031 compat_int_t gd32_maxlen;
2034 struct compat_nfsctl_arg {
2035 compat_int_t ca32_version; /* safeguard */
2037 struct compat_nfsctl_svc u32_svc;
2038 struct compat_nfsctl_client u32_client;
2039 struct compat_nfsctl_export u32_export;
2040 struct compat_nfsctl_fdparm u32_getfd;
2041 struct compat_nfsctl_fsparm u32_getfs;
2043 #define ca32_svc u.u32_svc
2044 #define ca32_client u.u32_client
2045 #define ca32_export u.u32_export
2046 #define ca32_getfd u.u32_getfd
2047 #define ca32_getfs u.u32_getfs
2050 union compat_nfsctl_res {
2051 __u8 cr32_getfh[NFS_FHSIZE];
2052 struct knfsd_fh cr32_getfs;
2055 static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
2056 struct compat_nfsctl_arg __user *arg)
2058 if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
2059 get_user(karg->ca_version, &arg->ca32_version) ||
2060 __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
2061 __get_user(karg->ca_svc.svc_nthreads,
2062 &arg->ca32_svc.svc32_nthreads))
2067 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
2068 struct compat_nfsctl_arg __user *arg)
2070 if (!access_ok(VERIFY_READ, &arg->ca32_client,
2071 sizeof(arg->ca32_client)) ||
2072 get_user(karg->ca_version, &arg->ca32_version) ||
2073 __copy_from_user(&karg->ca_client.cl_ident[0],
2074 &arg->ca32_client.cl32_ident[0],
2076 __get_user(karg->ca_client.cl_naddr,
2077 &arg->ca32_client.cl32_naddr) ||
2078 __copy_from_user(&karg->ca_client.cl_addrlist[0],
2079 &arg->ca32_client.cl32_addrlist[0],
2080 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
2081 __get_user(karg->ca_client.cl_fhkeytype,
2082 &arg->ca32_client.cl32_fhkeytype) ||
2083 __get_user(karg->ca_client.cl_fhkeylen,
2084 &arg->ca32_client.cl32_fhkeylen) ||
2085 __copy_from_user(&karg->ca_client.cl_fhkey[0],
2086 &arg->ca32_client.cl32_fhkey[0],
2093 static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
2094 struct compat_nfsctl_arg __user *arg)
2096 if (!access_ok(VERIFY_READ, &arg->ca32_export,
2097 sizeof(arg->ca32_export)) ||
2098 get_user(karg->ca_version, &arg->ca32_version) ||
2099 __copy_from_user(&karg->ca_export.ex_client[0],
2100 &arg->ca32_export.ex32_client[0],
2102 __copy_from_user(&karg->ca_export.ex_path[0],
2103 &arg->ca32_export.ex32_path[0],
2105 __get_user(karg->ca_export.ex_dev,
2106 &arg->ca32_export.ex32_dev) ||
2107 __get_user(karg->ca_export.ex_ino,
2108 &arg->ca32_export.ex32_ino) ||
2109 __get_user(karg->ca_export.ex_flags,
2110 &arg->ca32_export.ex32_flags) ||
2111 __get_user(karg->ca_export.ex_anon_uid,
2112 &arg->ca32_export.ex32_anon_uid) ||
2113 __get_user(karg->ca_export.ex_anon_gid,
2114 &arg->ca32_export.ex32_anon_gid))
2116 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
2117 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
2122 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
2123 struct compat_nfsctl_arg __user *arg)
2125 if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
2126 sizeof(arg->ca32_getfd)) ||
2127 get_user(karg->ca_version, &arg->ca32_version) ||
2128 __copy_from_user(&karg->ca_getfd.gd_addr,
2129 &arg->ca32_getfd.gd32_addr,
2130 (sizeof(struct sockaddr))) ||
2131 __copy_from_user(&karg->ca_getfd.gd_path,
2132 &arg->ca32_getfd.gd32_path,
2133 (NFS_MAXPATHLEN+1)) ||
2134 __get_user(karg->ca_getfd.gd_version,
2135 &arg->ca32_getfd.gd32_version))
2141 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
2142 struct compat_nfsctl_arg __user *arg)
2144 if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
2145 get_user(karg->ca_version, &arg->ca32_version) ||
2146 __copy_from_user(&karg->ca_getfs.gd_addr,
2147 &arg->ca32_getfs.gd32_addr,
2148 (sizeof(struct sockaddr))) ||
2149 __copy_from_user(&karg->ca_getfs.gd_path,
2150 &arg->ca32_getfs.gd32_path,
2151 (NFS_MAXPATHLEN+1)) ||
2152 __get_user(karg->ca_getfs.gd_maxlen,
2153 &arg->ca32_getfs.gd32_maxlen))
2159 /* This really doesn't need translations, we are only passing
2160 * back a union which contains opaque nfs file handle data.
2162 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
2163 union compat_nfsctl_res __user *res)
2167 err = copy_to_user(res, kres, sizeof(*res));
2169 return (err) ? -EFAULT : 0;
2172 asmlinkage long compat_sys_nfsservctl(int cmd,
2173 struct compat_nfsctl_arg __user *arg,
2174 union compat_nfsctl_res __user *res)
2176 struct nfsctl_arg *karg;
2177 union nfsctl_res *kres;
2181 karg = kmalloc(sizeof(*karg), GFP_USER);
2182 kres = kmalloc(sizeof(*kres), GFP_USER);
2183 if(!karg || !kres) {
2190 err = compat_nfs_svc_trans(karg, arg);
2193 case NFSCTL_ADDCLIENT:
2194 err = compat_nfs_clnt_trans(karg, arg);
2197 case NFSCTL_DELCLIENT:
2198 err = compat_nfs_clnt_trans(karg, arg);
2202 case NFSCTL_UNEXPORT:
2203 err = compat_nfs_exp_trans(karg, arg);
2207 err = compat_nfs_getfd_trans(karg, arg);
2211 err = compat_nfs_getfs_trans(karg, arg);
2224 /* The __user pointer casts are valid because of the set_fs() */
2225 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
2231 if((cmd == NFSCTL_GETFD) ||
2232 (cmd == NFSCTL_GETFS))
2233 err = compat_nfs_getfh_res_trans(kres, res);
2241 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
2243 return sys_ni_syscall();