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/init.h>
29 #include <linux/sockios.h> /* for SIOCDEVPRIVATE */
30 #include <linux/smb.h>
31 #include <linux/smb_mount.h>
32 #include <linux/ncp_mount.h>
33 #include <linux/smp_lock.h>
34 #include <linux/syscalls.h>
35 #include <linux/ctype.h>
36 #include <linux/module.h>
37 #include <linux/dirent.h>
38 #include <linux/dnotify.h>
39 #include <linux/highuid.h>
40 #include <linux/sunrpc/svc.h>
41 #include <linux/nfsd/nfsd.h>
42 #include <linux/nfsd/syscall.h>
43 #include <linux/personality.h>
45 #include <net/sock.h> /* siocdevprivate_ioctl */
47 #include <asm/uaccess.h>
48 #include <asm/mmu_context.h>
51 * Not all architectures have sys_utime, so implement this in terms
54 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
59 if (get_user(tv[0].tv_sec, &t->actime) ||
60 get_user(tv[1].tv_sec, &t->modtime))
65 return do_utimes(filename, t ? tv : NULL);
68 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
73 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
74 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
75 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
76 get_user(tv[1].tv_usec, &t[1].tv_usec))
79 return do_utimes(filename, t ? tv : NULL);
82 asmlinkage long compat_sys_newstat(char __user * filename,
83 struct compat_stat __user *statbuf)
86 int error = vfs_stat(filename, &stat);
89 error = cp_compat_stat(&stat, statbuf);
93 asmlinkage long compat_sys_newlstat(char __user * filename,
94 struct compat_stat __user *statbuf)
97 int error = vfs_lstat(filename, &stat);
100 error = cp_compat_stat(&stat, statbuf);
104 asmlinkage long compat_sys_newfstat(unsigned int fd,
105 struct compat_stat __user * statbuf)
108 int error = vfs_fstat(fd, &stat);
111 error = cp_compat_stat(&stat, statbuf);
115 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
118 if (sizeof ubuf->f_blocks == 4) {
119 if ((kbuf->f_blocks | kbuf->f_bfree |
120 kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
121 0xffffffff00000000ULL)
124 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
125 __put_user(kbuf->f_type, &ubuf->f_type) ||
126 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
127 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
128 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
129 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
130 __put_user(kbuf->f_files, &ubuf->f_files) ||
131 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
132 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
133 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
134 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
135 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
136 __put_user(0, &ubuf->f_spare[0]) ||
137 __put_user(0, &ubuf->f_spare[1]) ||
138 __put_user(0, &ubuf->f_spare[2]) ||
139 __put_user(0, &ubuf->f_spare[3]) ||
140 __put_user(0, &ubuf->f_spare[4]))
146 * The following statfs calls are copies of code from fs/open.c and
147 * should be checked against those from time to time
149 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
154 error = user_path_walk(path, &nd);
157 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
158 if (!error && put_compat_statfs(buf, &tmp))
165 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
175 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
176 if (!error && put_compat_statfs(buf, &tmp))
183 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
185 if (sizeof ubuf->f_blocks == 4) {
186 if ((kbuf->f_blocks | kbuf->f_bfree |
187 kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
188 0xffffffff00000000ULL)
191 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
192 __put_user(kbuf->f_type, &ubuf->f_type) ||
193 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
194 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
195 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
196 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
197 __put_user(kbuf->f_files, &ubuf->f_files) ||
198 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
199 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
200 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
201 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
202 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
207 asmlinkage long compat_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
212 if (sz != sizeof(*buf))
215 error = user_path_walk(path, &nd);
218 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
219 if (!error && put_compat_statfs64(buf, &tmp))
226 asmlinkage long compat_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
232 if (sz != sizeof(*buf))
239 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
240 if (!error && put_compat_statfs64(buf, &tmp))
247 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
249 #define IOCTL_HASHSIZE 256
250 struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
252 extern struct ioctl_trans ioctl_start[];
253 extern int ioctl_table_size;
255 static inline unsigned long ioctl32_hash(unsigned long cmd)
257 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
260 static void ioctl32_insert_translation(struct ioctl_trans *trans)
263 struct ioctl_trans *t;
265 hash = ioctl32_hash (trans->cmd);
266 if (!ioctl32_hash_table[hash])
267 ioctl32_hash_table[hash] = trans;
269 t = ioctl32_hash_table[hash];
277 static int __init init_sys32_ioctl(void)
281 for (i = 0; i < ioctl_table_size; i++) {
282 if (ioctl_start[i].next != 0) {
283 printk("ioctl translation %d bad\n",i);
287 ioctl32_insert_translation(&ioctl_start[i]);
292 __initcall(init_sys32_ioctl);
294 int register_ioctl32_conversion(unsigned int cmd, int (*handler)(unsigned int,
295 unsigned int, unsigned long, struct file *))
297 struct ioctl_trans *t;
298 struct ioctl_trans *new_t;
299 unsigned long hash = ioctl32_hash(cmd);
301 new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
306 for (t = ioctl32_hash_table[hash]; t; t = t->next) {
308 printk(KERN_ERR "Trying to register duplicated ioctl32 "
309 "handler %x\n", cmd);
317 new_t->handler = handler;
318 ioctl32_insert_translation(new_t);
323 EXPORT_SYMBOL(register_ioctl32_conversion);
325 static inline int builtin_ioctl(struct ioctl_trans *t)
327 return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
331 This function cannot unregister duplicate ioctls, because they are not
333 When they happen we need to extend the prototype to pass the handler too. */
335 int unregister_ioctl32_conversion(unsigned int cmd)
337 unsigned long hash = ioctl32_hash(cmd);
338 struct ioctl_trans *t, *t1;
342 t = ioctl32_hash_table[hash];
349 if (builtin_ioctl(t)) {
350 printk("%p tried to unregister builtin ioctl %x\n",
351 __builtin_return_address(0), cmd);
353 ioctl32_hash_table[hash] = t->next;
361 if (t1->cmd == cmd) {
362 if (builtin_ioctl(t1)) {
363 printk("%p tried to unregister builtin "
365 __builtin_return_address(0), cmd);
376 printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
382 EXPORT_SYMBOL(unregister_ioctl32_conversion);
384 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
389 struct ioctl_trans *t;
395 if (!filp->f_op || !filp->f_op->ioctl) {
396 error = sys_ioctl (fd, cmd, arg);
402 t = ioctl32_hash_table[ioctl32_hash (cmd)];
404 while (t && t->cmd != cmd)
408 error = t->handler(fd, cmd, arg, filp);
412 error = sys_ioctl(fd, cmd, arg);
416 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
417 error = siocdevprivate_ioctl(fd, cmd, arg);
425 path = (char *)__get_free_page(GFP_KERNEL);
427 /* find the name of the device. */
429 fn = d_path(filp->f_dentry,
430 filp->f_vfsmnt, path,
434 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
435 if (!isprint(buf[1]))
436 sprintf(buf, "%02x", buf[1]);
437 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
438 "cmd(%08x){%s} arg(%08x) on %s\n",
439 current->comm, current->pid,
440 (int)fd, (unsigned int)cmd, buf,
441 (unsigned int)arg, fn);
443 free_page((unsigned long)path);
454 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
456 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
457 __get_user(kfl->l_type, &ufl->l_type) ||
458 __get_user(kfl->l_whence, &ufl->l_whence) ||
459 __get_user(kfl->l_start, &ufl->l_start) ||
460 __get_user(kfl->l_len, &ufl->l_len) ||
461 __get_user(kfl->l_pid, &ufl->l_pid))
466 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
468 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
469 __put_user(kfl->l_type, &ufl->l_type) ||
470 __put_user(kfl->l_whence, &ufl->l_whence) ||
471 __put_user(kfl->l_start, &ufl->l_start) ||
472 __put_user(kfl->l_len, &ufl->l_len) ||
473 __put_user(kfl->l_pid, &ufl->l_pid))
478 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
479 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
481 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
482 __get_user(kfl->l_type, &ufl->l_type) ||
483 __get_user(kfl->l_whence, &ufl->l_whence) ||
484 __get_user(kfl->l_start, &ufl->l_start) ||
485 __get_user(kfl->l_len, &ufl->l_len) ||
486 __get_user(kfl->l_pid, &ufl->l_pid))
492 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
493 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
495 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
496 __put_user(kfl->l_type, &ufl->l_type) ||
497 __put_user(kfl->l_whence, &ufl->l_whence) ||
498 __put_user(kfl->l_start, &ufl->l_start) ||
499 __put_user(kfl->l_len, &ufl->l_len) ||
500 __put_user(kfl->l_pid, &ufl->l_pid))
506 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
517 ret = get_compat_flock(&f, compat_ptr(arg));
522 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
524 if ((cmd == F_GETLK) && (ret == 0)) {
525 if ((f.l_start >= COMPAT_OFF_T_MAX) ||
526 ((f.l_start + f.l_len) >= COMPAT_OFF_T_MAX))
529 ret = put_compat_flock(&f, compat_ptr(arg));
536 ret = get_compat_flock64(&f, compat_ptr(arg));
541 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
542 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
545 if ((cmd == F_GETLK64) && (ret == 0)) {
546 if ((f.l_start >= COMPAT_LOFF_T_MAX) ||
547 ((f.l_start + f.l_len) >= COMPAT_LOFF_T_MAX))
550 ret = put_compat_flock64(&f, compat_ptr(arg));
555 ret = sys_fcntl(fd, cmd, arg);
561 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
564 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
566 return compat_sys_fcntl64(fd, cmd, arg);
570 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
575 mm_segment_t oldfs = get_fs();
576 if (unlikely(get_user(ctx64, ctx32p)))
580 /* The __user pointer cast is valid because of the set_fs() */
581 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
583 /* truncating is ok because it's a user address */
585 ret = put_user((u32) ctx64, ctx32p);
590 compat_sys_io_getevents(aio_context_t ctx_id,
591 unsigned long min_nr,
593 struct io_event __user *events,
594 struct compat_timespec __user *timeout)
598 struct timespec __user *ut = NULL;
601 if (unlikely(!access_ok(VERIFY_WRITE, events,
602 nr * sizeof(struct io_event))))
605 if (get_compat_timespec(&t, timeout))
608 ut = compat_alloc_user_space(sizeof(*ut));
609 if (copy_to_user(ut, &t, sizeof(t)) )
612 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
618 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
623 for (i = 0; i < nr; ++i) {
624 if (get_user(uptr, ptr32 + i))
626 if (put_user(compat_ptr(uptr), ptr64 + i))
632 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
635 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
637 struct iocb __user * __user *iocb64;
640 if (unlikely(nr < 0))
643 if (nr > MAX_AIO_SUBMITS)
644 nr = MAX_AIO_SUBMITS;
646 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
647 ret = copy_iocb(nr, iocb, iocb64);
649 ret = sys_io_submit(ctx_id, nr, iocb64);
653 struct compat_ncp_mount_data {
654 compat_int_t version;
655 compat_uint_t ncp_fd;
656 compat_uid_t mounted_uid;
657 compat_pid_t wdog_pid;
658 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
659 compat_uint_t time_out;
660 compat_uint_t retry_count;
664 compat_mode_t file_mode;
665 compat_mode_t dir_mode;
668 struct compat_ncp_mount_data_v4 {
669 compat_int_t version;
670 compat_ulong_t flags;
671 compat_ulong_t mounted_uid;
672 compat_long_t wdog_pid;
673 compat_uint_t ncp_fd;
674 compat_uint_t time_out;
675 compat_uint_t retry_count;
678 compat_ulong_t file_mode;
679 compat_ulong_t dir_mode;
682 static void *do_ncp_super_data_conv(void *raw_data)
684 int version = *(unsigned int *)raw_data;
687 struct compat_ncp_mount_data *c_n = raw_data;
688 struct ncp_mount_data *n = raw_data;
690 n->dir_mode = c_n->dir_mode;
691 n->file_mode = c_n->file_mode;
694 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
695 n->wdog_pid = c_n->wdog_pid;
696 n->mounted_uid = c_n->mounted_uid;
697 } else if (version == 4) {
698 struct compat_ncp_mount_data_v4 *c_n = raw_data;
699 struct ncp_mount_data_v4 *n = raw_data;
701 n->dir_mode = c_n->dir_mode;
702 n->file_mode = c_n->file_mode;
705 n->retry_count = c_n->retry_count;
706 n->time_out = c_n->time_out;
707 n->ncp_fd = c_n->ncp_fd;
708 n->wdog_pid = c_n->wdog_pid;
709 n->mounted_uid = c_n->mounted_uid;
710 n->flags = c_n->flags;
711 } else if (version != 5) {
718 struct compat_smb_mount_data {
719 compat_int_t version;
720 compat_uid_t mounted_uid;
723 compat_mode_t file_mode;
724 compat_mode_t dir_mode;
727 static void *do_smb_super_data_conv(void *raw_data)
729 struct smb_mount_data *s = raw_data;
730 struct compat_smb_mount_data *c_s = raw_data;
732 if (c_s->version != SMB_MOUNT_OLDVERSION)
734 s->dir_mode = c_s->dir_mode;
735 s->file_mode = c_s->file_mode;
738 s->mounted_uid = c_s->mounted_uid;
743 extern int copy_mount_options (const void __user *, unsigned long *);
745 #define SMBFS_NAME "smbfs"
746 #define NCPFS_NAME "ncpfs"
748 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
749 char __user * type, unsigned long flags,
752 unsigned long type_page;
753 unsigned long data_page;
754 unsigned long dev_page;
758 retval = copy_mount_options (type, &type_page);
762 dir_page = getname(dir_name);
763 retval = PTR_ERR(dir_page);
764 if (IS_ERR(dir_page))
767 retval = copy_mount_options (dev_name, &dev_page);
771 retval = copy_mount_options (data, &data_page);
778 if (!strcmp((char *)type_page, SMBFS_NAME)) {
779 do_smb_super_data_conv((void *)data_page);
780 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
781 do_ncp_super_data_conv((void *)data_page);
786 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
787 flags, (void*)data_page);
790 free_page(data_page);
796 free_page(type_page);
801 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
802 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
803 ~(sizeof(compat_long_t)-1))
805 struct compat_old_linux_dirent {
806 compat_ulong_t d_ino;
807 compat_ulong_t d_offset;
808 unsigned short d_namlen;
812 struct compat_readdir_callback {
813 struct compat_old_linux_dirent __user *dirent;
817 static int compat_fillonedir(void *__buf, const char *name, int namlen,
818 loff_t offset, ino_t ino, unsigned int d_type)
820 struct compat_readdir_callback *buf = __buf;
821 struct compat_old_linux_dirent __user *dirent;
826 dirent = buf->dirent;
827 if (!access_ok(VERIFY_WRITE, (unsigned long)dirent,
828 (unsigned long)(dirent->d_name + namlen + 1) -
829 (unsigned long)dirent))
831 if ( __put_user(ino, &dirent->d_ino) ||
832 __put_user(offset, &dirent->d_offset) ||
833 __put_user(namlen, &dirent->d_namlen) ||
834 __copy_to_user(dirent->d_name, name, namlen) ||
835 __put_user(0, dirent->d_name + namlen))
839 buf->result = -EFAULT;
843 asmlinkage long compat_old_readdir(unsigned int fd,
844 struct compat_old_linux_dirent __user *dirent, unsigned int count)
848 struct compat_readdir_callback buf;
858 error = vfs_readdir(file, compat_fillonedir, &buf);
867 struct compat_linux_dirent {
868 compat_ulong_t d_ino;
869 compat_ulong_t d_off;
870 unsigned short d_reclen;
874 struct compat_getdents_callback {
875 struct compat_linux_dirent __user *current_dir;
876 struct compat_linux_dirent __user *previous;
881 static int compat_filldir(void *__buf, const char *name, int namlen,
882 loff_t offset, ino_t ino, unsigned int d_type)
884 struct compat_linux_dirent __user * dirent;
885 struct compat_getdents_callback *buf = __buf;
886 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
888 buf->error = -EINVAL; /* only used if we fail.. */
889 if (reclen > buf->count)
891 dirent = buf->previous;
893 if (__put_user(offset, &dirent->d_off))
896 dirent = buf->current_dir;
897 if (__put_user(ino, &dirent->d_ino))
899 if (__put_user(reclen, &dirent->d_reclen))
901 if (copy_to_user(dirent->d_name, name, namlen))
903 if (__put_user(0, dirent->d_name + namlen))
905 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
907 buf->previous = dirent;
908 dirent = (void __user *)dirent + reclen;
909 buf->current_dir = dirent;
910 buf->count -= reclen;
913 buf->error = -EFAULT;
917 asmlinkage long compat_sys_getdents(unsigned int fd,
918 struct compat_linux_dirent __user *dirent, unsigned int count)
921 struct compat_linux_dirent __user * lastdirent;
922 struct compat_getdents_callback buf;
926 if (!access_ok(VERIFY_WRITE, dirent, count))
934 buf.current_dir = dirent;
939 error = vfs_readdir(file, compat_filldir, &buf);
943 lastdirent = buf.previous;
945 if (put_user(file->f_pos, &lastdirent->d_off))
948 error = count - buf.count;
957 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
958 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
960 struct compat_getdents_callback64 {
961 struct linux_dirent64 __user *current_dir;
962 struct linux_dirent64 __user *previous;
967 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
968 ino_t ino, unsigned int d_type)
970 struct linux_dirent64 __user *dirent;
971 struct compat_getdents_callback64 *buf = __buf;
972 int jj = NAME_OFFSET(dirent);
973 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
976 buf->error = -EINVAL; /* only used if we fail.. */
977 if (reclen > buf->count)
979 dirent = buf->previous;
982 if (__put_user(offset, (u32 __user *)&dirent->d_off))
984 if (__put_user(offset >> 32,
985 ((u32 __user *)&dirent->d_off) + 1))
988 dirent = buf->current_dir;
989 if ((__put_user(ino, (u32 __user *)&dirent->d_ino))
990 || (__put_user(ino >> 32, ((u32 __user *)&dirent->d_ino) + 1)))
993 if ((__put_user(off, (u32 __user *)&dirent->d_off))
994 || (__put_user(off >> 32, ((u32 __user *)&dirent->d_off) + 1)))
996 if (__put_user(reclen, &dirent->d_reclen))
998 if (__put_user(d_type, &dirent->d_type))
1000 if (copy_to_user(dirent->d_name, name, namlen))
1002 if (__put_user(0, dirent->d_name + namlen))
1004 buf->previous = dirent;
1005 dirent = (void __user *)dirent + reclen;
1006 buf->current_dir = dirent;
1007 buf->count -= reclen;
1010 buf->error = -EFAULT;
1014 asmlinkage long compat_sys_getdents64(unsigned int fd,
1015 struct linux_dirent64 __user * dirent, unsigned int count)
1018 struct linux_dirent64 __user * lastdirent;
1019 struct compat_getdents_callback64 buf;
1023 if (!access_ok(VERIFY_WRITE, dirent, count))
1031 buf.current_dir = dirent;
1032 buf.previous = NULL;
1036 error = vfs_readdir(file, compat_filldir64, &buf);
1040 lastdirent = buf.previous;
1042 typeof(lastdirent->d_off) d_off = file->f_pos;
1043 __put_user(d_off, (u32 __user *)&lastdirent->d_off);
1044 __put_user(d_off >> 32, ((u32 __user *)&lastdirent->d_off) + 1);
1045 error = count - buf.count;
1053 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1055 static ssize_t compat_do_readv_writev(int type, struct file *file,
1056 const struct compat_iovec __user *uvector,
1057 unsigned long nr_segs, loff_t *pos)
1059 typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
1060 typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
1062 compat_ssize_t tot_len;
1063 struct iovec iovstack[UIO_FASTIOV];
1064 struct iovec *iov=iovstack, *vector;
1069 struct inode *inode;
1072 * SuS says "The readv() function *may* fail if the iovcnt argument
1073 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1074 * traditionally returned zero for zero segments, so...
1081 * First get the "struct iovec" from user memory and
1082 * verify all the pointers
1085 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1089 if (nr_segs > UIO_FASTIOV) {
1091 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1096 if (verify_area(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1100 * Single unix specification:
1101 * We should -EINVAL if an element length is not >= 0 and fitting an
1102 * ssize_t. The total length is fitting an ssize_t
1104 * Be careful here because iov_len is a size_t not an ssize_t
1109 for (seg = 0 ; seg < nr_segs; seg++) {
1110 compat_ssize_t tmp = tot_len;
1114 if (__get_user(len, &uvector->iov_len) ||
1115 __get_user(buf, &uvector->iov_base)) {
1119 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1122 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1124 vector->iov_base = compat_ptr(buf);
1125 vector->iov_len = (compat_size_t) len;
1134 inode = file->f_dentry->d_inode;
1135 /* VERIFY_WRITE actually means a read, as we write to user space */
1136 ret = locks_verify_area((type == READ
1137 ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE),
1138 inode, file, *pos, tot_len);
1144 fn = file->f_op->read;
1145 fnv = file->f_op->readv;
1147 fn = (io_fn_t)file->f_op->write;
1148 fnv = file->f_op->writev;
1151 ret = fnv(file, iov, nr_segs, pos);
1155 /* Do it by hand, with file-ops */
1158 while (nr_segs > 0) {
1163 base = vector->iov_base;
1164 len = vector->iov_len;
1168 nr = fn(file, base, len, pos);
1179 if (iov != iovstack)
1181 if ((ret + (type == READ)) > 0)
1182 dnotify_parent(file->f_dentry,
1183 (type == READ) ? DN_ACCESS : DN_MODIFY);
1188 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1191 ssize_t ret = -EBADF;
1197 if (!(file->f_mode & FMODE_READ))
1201 if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
1204 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1212 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1215 ssize_t ret = -EBADF;
1220 if (!(file->f_mode & FMODE_WRITE))
1224 if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
1227 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1235 * compat_count() counts the number of arguments/envelopes. It is basically
1236 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1237 * and envp pointers.
1239 static int compat_count(compat_uptr_t __user *argv, int max)
1247 if (get_user(p, argv))
1260 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1261 * except that it works with 32 bit argv and envp pointers.
1263 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1264 struct linux_binprm *bprm)
1266 struct page *kmapped_page = NULL;
1270 while (argc-- > 0) {
1275 if (get_user(str, argv+argc) ||
1276 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1281 if (bprm->p < len) {
1287 /* XXX: add architecture specific overflow check here. */
1292 int offset, bytes_to_copy;
1295 offset = pos % PAGE_SIZE;
1297 page = bprm->page[i];
1300 page = alloc_page(GFP_HIGHUSER);
1301 bprm->page[i] = page;
1309 if (page != kmapped_page) {
1311 kunmap(kmapped_page);
1312 kmapped_page = page;
1313 kaddr = kmap(kmapped_page);
1316 memset(kaddr, 0, offset);
1317 bytes_to_copy = PAGE_SIZE - offset;
1318 if (bytes_to_copy > len) {
1319 bytes_to_copy = len;
1321 memset(kaddr+offset+len, 0,
1322 PAGE_SIZE-offset-len);
1324 err = copy_from_user(kaddr+offset, compat_ptr(str),
1331 pos += bytes_to_copy;
1332 str += bytes_to_copy;
1333 len -= bytes_to_copy;
1339 kunmap(kmapped_page);
1345 #define free_arg_pages(bprm) do { } while (0)
1349 static inline void free_arg_pages(struct linux_binprm *bprm)
1353 for (i = 0; i < MAX_ARG_PAGES; i++) {
1355 __free_page(bprm->page[i]);
1356 bprm->page[i] = NULL;
1360 #endif /* CONFIG_MMU */
1363 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1364 * that it processes 32 bit argv and envp pointers.
1366 int compat_do_execve(char * filename,
1367 compat_uptr_t __user *argv,
1368 compat_uptr_t __user *envp,
1369 struct pt_regs * regs)
1371 struct linux_binprm bprm;
1376 sched_balance_exec();
1378 file = open_exec(filename);
1380 retval = PTR_ERR(file);
1384 bprm.p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1385 memset(bprm.page, 0, MAX_ARG_PAGES*sizeof(bprm.page[0]));
1388 bprm.filename = filename;
1389 bprm.interp = filename;
1393 bprm.security = NULL;
1394 bprm.mm = mm_alloc();
1399 retval = init_new_context(current, bprm.mm);
1403 bprm.argc = compat_count(argv, bprm.p / sizeof(compat_uptr_t));
1404 if ((retval = bprm.argc) < 0)
1407 bprm.envc = compat_count(envp, bprm.p / sizeof(compat_uptr_t));
1408 if ((retval = bprm.envc) < 0)
1411 retval = security_bprm_alloc(&bprm);
1415 retval = prepare_binprm(&bprm);
1419 retval = copy_strings_kernel(1, &bprm.filename, &bprm);
1424 retval = compat_copy_strings(bprm.envc, envp, &bprm);
1428 retval = compat_copy_strings(bprm.argc, argv, &bprm);
1432 retval = search_binary_handler(&bprm,regs);
1434 free_arg_pages(&bprm);
1436 /* execve success */
1437 security_bprm_free(&bprm);
1442 /* Something went wrong, return the inode and free the argument pages*/
1443 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1444 struct page * page = bprm.page[i];
1450 security_bprm_free(&bprm);
1458 allow_write_access(bprm.file);
1465 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1467 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1470 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1471 * 64-bit unsigned longs.
1474 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1475 unsigned long *fdset)
1477 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1481 if (verify_area(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1488 __get_user(l, ufdset);
1489 __get_user(h, ufdset+1);
1491 *fdset++ = h << 32 | l;
1495 __get_user(*fdset, ufdset);
1497 /* Tricky, must clear full unsigned long in the
1498 * kernel fdset at the end, this makes sure that
1501 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1507 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1508 unsigned long *fdset)
1511 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1522 __put_user(l, ufdset);
1523 __put_user(h, ufdset+1);
1528 __put_user(*fdset, ufdset);
1533 * This is a virtual copy of sys_select from fs/select.c and probably
1534 * should be compared to it from time to time
1536 static void *select_bits_alloc(int size)
1538 return kmalloc(6 * size, GFP_KERNEL);
1541 static void select_bits_free(void *bits, int size)
1547 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1548 * like to be certain this leads to no problems. So I return
1549 * EINTR just for safety.
1551 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1552 * I'm trying ERESTARTNOHAND which restart only when you want to.
1554 #define MAX_SELECT_SECONDS \
1555 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1558 compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp,
1559 compat_ulong_t __user *exp, struct compat_timeval __user *tvp)
1564 int ret, size, max_fdset;
1566 timeout = MAX_SCHEDULE_TIMEOUT;
1570 if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
1571 || (ret = __get_user(sec, &tvp->tv_sec))
1572 || (ret = __get_user(usec, &tvp->tv_usec)))
1576 if (sec < 0 || usec < 0)
1579 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1580 timeout = ROUND_UP(usec, 1000000/HZ);
1581 timeout += sec * (unsigned long) HZ;
1589 /* max_fdset can increase, so grab it once to avoid race */
1590 max_fdset = current->files->max_fdset;
1595 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1596 * since we used fdset we need to allocate memory in units of
1600 size = FDS_BYTES(n);
1601 bits = select_bits_alloc(size);
1604 fds.in = (unsigned long *) bits;
1605 fds.out = (unsigned long *) (bits + size);
1606 fds.ex = (unsigned long *) (bits + 2*size);
1607 fds.res_in = (unsigned long *) (bits + 3*size);
1608 fds.res_out = (unsigned long *) (bits + 4*size);
1609 fds.res_ex = (unsigned long *) (bits + 5*size);
1611 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1612 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1613 (ret = compat_get_fd_set(n, exp, fds.ex)))
1615 zero_fd_set(n, fds.res_in);
1616 zero_fd_set(n, fds.res_out);
1617 zero_fd_set(n, fds.res_ex);
1619 ret = do_select(n, &fds, &timeout);
1621 if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
1622 time_t sec = 0, usec = 0;
1625 usec = timeout % HZ;
1626 usec *= (1000000/HZ);
1628 if (put_user(sec, &tvp->tv_sec) ||
1629 put_user(usec, &tvp->tv_usec))
1636 ret = -ERESTARTNOHAND;
1637 if (signal_pending(current))
1642 compat_set_fd_set(n, inp, fds.res_in);
1643 compat_set_fd_set(n, outp, fds.res_out);
1644 compat_set_fd_set(n, exp, fds.res_ex);
1647 select_bits_free(bits, size);
1652 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1653 /* Stuff for NFS server syscalls... */
1654 struct compat_nfsctl_svc {
1659 struct compat_nfsctl_client {
1660 s8 cl32_ident[NFSCLNT_IDMAX+1];
1662 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1665 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1668 struct compat_nfsctl_export {
1669 char ex32_client[NFSCLNT_IDMAX+1];
1670 char ex32_path[NFS_MAXPATHLEN+1];
1671 compat_dev_t ex32_dev;
1672 compat_ino_t ex32_ino;
1673 compat_int_t ex32_flags;
1674 compat_uid_t ex32_anon_uid;
1675 compat_gid_t ex32_anon_gid;
1678 struct compat_nfsctl_fdparm {
1679 struct sockaddr gd32_addr;
1680 s8 gd32_path[NFS_MAXPATHLEN+1];
1681 compat_int_t gd32_version;
1684 struct compat_nfsctl_fsparm {
1685 struct sockaddr gd32_addr;
1686 s8 gd32_path[NFS_MAXPATHLEN+1];
1687 compat_int_t gd32_maxlen;
1690 struct compat_nfsctl_arg {
1691 compat_int_t ca32_version; /* safeguard */
1693 struct compat_nfsctl_svc u32_svc;
1694 struct compat_nfsctl_client u32_client;
1695 struct compat_nfsctl_export u32_export;
1696 struct compat_nfsctl_fdparm u32_getfd;
1697 struct compat_nfsctl_fsparm u32_getfs;
1699 #define ca32_svc u.u32_svc
1700 #define ca32_client u.u32_client
1701 #define ca32_export u.u32_export
1702 #define ca32_getfd u.u32_getfd
1703 #define ca32_getfs u.u32_getfs
1706 union compat_nfsctl_res {
1707 __u8 cr32_getfh[NFS_FHSIZE];
1708 struct knfsd_fh cr32_getfs;
1711 static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1715 err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
1716 err |= get_user(karg->ca_version, &arg->ca32_version);
1717 err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
1718 err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
1719 return (err) ? -EFAULT : 0;
1722 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1726 err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
1727 err |= get_user(karg->ca_version, &arg->ca32_version);
1728 err |= __copy_from_user(&karg->ca_client.cl_ident[0],
1729 &arg->ca32_client.cl32_ident[0],
1731 err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
1732 err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
1733 &arg->ca32_client.cl32_addrlist[0],
1734 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
1735 err |= __get_user(karg->ca_client.cl_fhkeytype,
1736 &arg->ca32_client.cl32_fhkeytype);
1737 err |= __get_user(karg->ca_client.cl_fhkeylen,
1738 &arg->ca32_client.cl32_fhkeylen);
1739 err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
1740 &arg->ca32_client.cl32_fhkey[0],
1743 return (err) ? -EFAULT : 0;
1746 static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1750 err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
1751 err |= get_user(karg->ca_version, &arg->ca32_version);
1752 err |= __copy_from_user(&karg->ca_export.ex_client[0],
1753 &arg->ca32_export.ex32_client[0],
1755 err |= __copy_from_user(&karg->ca_export.ex_path[0],
1756 &arg->ca32_export.ex32_path[0],
1758 err |= __get_user(karg->ca_export.ex_dev,
1759 &arg->ca32_export.ex32_dev);
1760 err |= __get_user(karg->ca_export.ex_ino,
1761 &arg->ca32_export.ex32_ino);
1762 err |= __get_user(karg->ca_export.ex_flags,
1763 &arg->ca32_export.ex32_flags);
1764 err |= __get_user(karg->ca_export.ex_anon_uid,
1765 &arg->ca32_export.ex32_anon_uid);
1766 err |= __get_user(karg->ca_export.ex_anon_gid,
1767 &arg->ca32_export.ex32_anon_gid);
1768 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1769 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1771 return (err) ? -EFAULT : 0;
1774 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1778 err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
1779 err |= get_user(karg->ca_version, &arg->ca32_version);
1780 err |= __copy_from_user(&karg->ca_getfd.gd_addr,
1781 &arg->ca32_getfd.gd32_addr,
1782 (sizeof(struct sockaddr)));
1783 err |= __copy_from_user(&karg->ca_getfd.gd_path,
1784 &arg->ca32_getfd.gd32_path,
1785 (NFS_MAXPATHLEN+1));
1786 err |= __get_user(karg->ca_getfd.gd_version,
1787 &arg->ca32_getfd.gd32_version);
1789 return (err) ? -EFAULT : 0;
1792 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1796 err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
1797 err |= get_user(karg->ca_version, &arg->ca32_version);
1798 err |= __copy_from_user(&karg->ca_getfs.gd_addr,
1799 &arg->ca32_getfs.gd32_addr,
1800 (sizeof(struct sockaddr)));
1801 err |= __copy_from_user(&karg->ca_getfs.gd_path,
1802 &arg->ca32_getfs.gd32_path,
1803 (NFS_MAXPATHLEN+1));
1804 err |= __get_user(karg->ca_getfs.gd_maxlen,
1805 &arg->ca32_getfs.gd32_maxlen);
1807 return (err) ? -EFAULT : 0;
1810 /* This really doesn't need translations, we are only passing
1811 * back a union which contains opaque nfs file handle data.
1813 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
1817 err = copy_to_user(res, kres, sizeof(*res));
1819 return (err) ? -EFAULT : 0;
1822 asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
1823 union compat_nfsctl_res __user *res)
1825 struct nfsctl_arg *karg;
1826 union nfsctl_res *kres;
1830 karg = kmalloc(sizeof(*karg), GFP_USER);
1831 kres = kmalloc(sizeof(*kres), GFP_USER);
1832 if(!karg || !kres) {
1839 err = compat_nfs_svc_trans(karg, arg);
1842 case NFSCTL_ADDCLIENT:
1843 err = compat_nfs_clnt_trans(karg, arg);
1846 case NFSCTL_DELCLIENT:
1847 err = compat_nfs_clnt_trans(karg, arg);
1851 case NFSCTL_UNEXPORT:
1852 err = compat_nfs_exp_trans(karg, arg);
1856 err = compat_nfs_getfd_trans(karg, arg);
1860 err = compat_nfs_getfs_trans(karg, arg);
1870 /* The __user pointer casts are valid because of the set_fs() */
1871 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
1877 if((cmd == NFSCTL_GETFD) ||
1878 (cmd == NFSCTL_GETFS))
1879 err = compat_nfs_getfh_res_trans(kres, res);
1887 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
1889 return sys_ni_syscall();