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>
44 #include <linux/rwsem.h>
46 #include <net/sock.h> /* siocdevprivate_ioctl */
48 #include <asm/uaccess.h>
49 #include <asm/mmu_context.h>
52 * Not all architectures have sys_utime, so implement this in terms
55 asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
60 if (get_user(tv[0].tv_sec, &t->actime) ||
61 get_user(tv[1].tv_sec, &t->modtime))
66 return do_utimes(filename, t ? tv : NULL);
69 asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
74 if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
75 get_user(tv[0].tv_usec, &t[0].tv_usec) ||
76 get_user(tv[1].tv_sec, &t[1].tv_sec) ||
77 get_user(tv[1].tv_usec, &t[1].tv_usec))
80 return do_utimes(filename, t ? tv : NULL);
83 asmlinkage long compat_sys_newstat(char __user * filename,
84 struct compat_stat __user *statbuf)
87 int error = vfs_stat(filename, &stat);
90 error = cp_compat_stat(&stat, statbuf);
94 asmlinkage long compat_sys_newlstat(char __user * filename,
95 struct compat_stat __user *statbuf)
98 int error = vfs_lstat(filename, &stat);
101 error = cp_compat_stat(&stat, statbuf);
105 asmlinkage long compat_sys_newfstat(unsigned int fd,
106 struct compat_stat __user * statbuf)
109 int error = vfs_fstat(fd, &stat);
112 error = cp_compat_stat(&stat, statbuf);
116 static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
119 if (sizeof ubuf->f_blocks == 4) {
120 if ((kbuf->f_blocks | kbuf->f_bfree |
121 kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
122 0xffffffff00000000ULL)
125 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
126 __put_user(kbuf->f_type, &ubuf->f_type) ||
127 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
128 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
129 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
130 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
131 __put_user(kbuf->f_files, &ubuf->f_files) ||
132 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
133 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
134 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
135 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
136 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
137 __put_user(0, &ubuf->f_spare[0]) ||
138 __put_user(0, &ubuf->f_spare[1]) ||
139 __put_user(0, &ubuf->f_spare[2]) ||
140 __put_user(0, &ubuf->f_spare[3]) ||
141 __put_user(0, &ubuf->f_spare[4]))
147 * The following statfs calls are copies of code from fs/open.c and
148 * should be checked against those from time to time
150 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
155 error = user_path_walk(path, &nd);
158 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
159 if (!error && put_compat_statfs(buf, &tmp))
166 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
176 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
177 if (!error && put_compat_statfs(buf, &tmp))
184 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
186 if (sizeof ubuf->f_blocks == 4) {
187 if ((kbuf->f_blocks | kbuf->f_bfree |
188 kbuf->f_bavail | kbuf->f_files | kbuf->f_ffree) &
189 0xffffffff00000000ULL)
192 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
193 __put_user(kbuf->f_type, &ubuf->f_type) ||
194 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
195 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
196 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
197 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
198 __put_user(kbuf->f_files, &ubuf->f_files) ||
199 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
200 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
201 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
202 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
203 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
208 asmlinkage long compat_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
213 if (sz != sizeof(*buf))
216 error = user_path_walk(path, &nd);
219 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
220 if (!error && put_compat_statfs64(buf, &tmp))
227 asmlinkage long compat_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
233 if (sz != sizeof(*buf))
240 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
241 if (!error && put_compat_statfs64(buf, &tmp))
248 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
250 #define IOCTL_HASHSIZE 256
251 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
252 static DECLARE_RWSEM(ioctl32_sem);
254 extern struct ioctl_trans ioctl_start[];
255 extern int ioctl_table_size;
257 static inline unsigned long ioctl32_hash(unsigned long cmd)
259 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
262 static void ioctl32_insert_translation(struct ioctl_trans *trans)
265 struct ioctl_trans *t;
267 hash = ioctl32_hash (trans->cmd);
268 if (!ioctl32_hash_table[hash])
269 ioctl32_hash_table[hash] = trans;
271 t = ioctl32_hash_table[hash];
279 static int __init init_sys32_ioctl(void)
283 for (i = 0; i < ioctl_table_size; i++) {
284 if (ioctl_start[i].next != 0) {
285 printk("ioctl translation %d bad\n",i);
289 ioctl32_insert_translation(&ioctl_start[i]);
294 __initcall(init_sys32_ioctl);
296 int register_ioctl32_conversion(unsigned int cmd,
297 ioctl_trans_handler_t handler)
299 struct ioctl_trans *t;
300 struct ioctl_trans *new_t;
301 unsigned long hash = ioctl32_hash(cmd);
303 new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
307 down_write(&ioctl32_sem);
308 for (t = ioctl32_hash_table[hash]; t; t = t->next) {
310 printk(KERN_ERR "Trying to register duplicated ioctl32 "
311 "handler %x\n", cmd);
312 up_write(&ioctl32_sem);
319 new_t->handler = handler;
320 ioctl32_insert_translation(new_t);
322 up_write(&ioctl32_sem);
325 EXPORT_SYMBOL(register_ioctl32_conversion);
327 static inline int builtin_ioctl(struct ioctl_trans *t)
329 return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
333 This function cannot unregister duplicate ioctls, because they are not
335 When they happen we need to extend the prototype to pass the handler too. */
337 int unregister_ioctl32_conversion(unsigned int cmd)
339 unsigned long hash = ioctl32_hash(cmd);
340 struct ioctl_trans *t, *t1;
342 down_write(&ioctl32_sem);
344 t = ioctl32_hash_table[hash];
346 up_write(&ioctl32_sem);
351 if (builtin_ioctl(t)) {
352 printk("%p tried to unregister builtin ioctl %x\n",
353 __builtin_return_address(0), cmd);
355 ioctl32_hash_table[hash] = t->next;
356 up_write(&ioctl32_sem);
363 if (t1->cmd == cmd) {
364 if (builtin_ioctl(t1)) {
365 printk("%p tried to unregister builtin "
367 __builtin_return_address(0), cmd);
371 up_write(&ioctl32_sem);
378 printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
381 up_write(&ioctl32_sem);
384 EXPORT_SYMBOL(unregister_ioctl32_conversion);
386 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
391 struct ioctl_trans *t;
397 if (!filp->f_op || !filp->f_op->ioctl) {
398 error = sys_ioctl (fd, cmd, arg);
402 down_read(&ioctl32_sem);
404 t = ioctl32_hash_table[ioctl32_hash (cmd)];
406 while (t && t->cmd != cmd)
411 error = t->handler(fd, cmd, arg, filp);
413 up_read(&ioctl32_sem);
415 up_read(&ioctl32_sem);
416 error = sys_ioctl(fd, cmd, arg);
419 up_read(&ioctl32_sem);
420 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
421 error = siocdevprivate_ioctl(fd, cmd, arg);
429 path = (char *)__get_free_page(GFP_KERNEL);
431 /* find the name of the device. */
433 fn = d_path(filp->f_dentry,
434 filp->f_vfsmnt, path,
440 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
441 if (!isprint(buf[1]))
442 sprintf(buf, "%02x", buf[1]);
443 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
444 "cmd(%08x){%s} arg(%08x) on %s\n",
445 current->comm, current->pid,
446 (int)fd, (unsigned int)cmd, buf,
447 (unsigned int)arg, fn);
449 free_page((unsigned long)path);
460 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
462 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
463 __get_user(kfl->l_type, &ufl->l_type) ||
464 __get_user(kfl->l_whence, &ufl->l_whence) ||
465 __get_user(kfl->l_start, &ufl->l_start) ||
466 __get_user(kfl->l_len, &ufl->l_len) ||
467 __get_user(kfl->l_pid, &ufl->l_pid))
472 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
474 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
475 __put_user(kfl->l_type, &ufl->l_type) ||
476 __put_user(kfl->l_whence, &ufl->l_whence) ||
477 __put_user(kfl->l_start, &ufl->l_start) ||
478 __put_user(kfl->l_len, &ufl->l_len) ||
479 __put_user(kfl->l_pid, &ufl->l_pid))
484 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
485 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
487 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
488 __get_user(kfl->l_type, &ufl->l_type) ||
489 __get_user(kfl->l_whence, &ufl->l_whence) ||
490 __get_user(kfl->l_start, &ufl->l_start) ||
491 __get_user(kfl->l_len, &ufl->l_len) ||
492 __get_user(kfl->l_pid, &ufl->l_pid))
498 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
499 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
501 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
502 __put_user(kfl->l_type, &ufl->l_type) ||
503 __put_user(kfl->l_whence, &ufl->l_whence) ||
504 __put_user(kfl->l_start, &ufl->l_start) ||
505 __put_user(kfl->l_len, &ufl->l_len) ||
506 __put_user(kfl->l_pid, &ufl->l_pid))
512 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
523 ret = get_compat_flock(&f, compat_ptr(arg));
528 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
530 if ((cmd == F_GETLK) && (ret == 0)) {
531 if ((compat_off_t) f.l_start != f.l_start ||
532 (compat_off_t) f.l_len != f.l_len)
535 ret = put_compat_flock(&f, compat_ptr(arg));
542 ret = get_compat_flock64(&f, compat_ptr(arg));
547 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
548 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
551 if ((cmd == F_GETLK64) && (ret == 0)) {
552 if ((compat_loff_t) f.l_start != f.l_start ||
553 (compat_loff_t) f.l_len != f.l_len)
556 ret = put_compat_flock64(&f, compat_ptr(arg));
561 ret = sys_fcntl(fd, cmd, arg);
567 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
570 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
572 return compat_sys_fcntl64(fd, cmd, arg);
576 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
581 mm_segment_t oldfs = get_fs();
582 if (unlikely(get_user(ctx64, ctx32p)))
586 /* The __user pointer cast is valid because of the set_fs() */
587 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
589 /* truncating is ok because it's a user address */
591 ret = put_user((u32) ctx64, ctx32p);
596 compat_sys_io_getevents(aio_context_t ctx_id,
597 unsigned long min_nr,
599 struct io_event __user *events,
600 struct compat_timespec __user *timeout)
604 struct timespec __user *ut = NULL;
607 if (unlikely(!access_ok(VERIFY_WRITE, events,
608 nr * sizeof(struct io_event))))
611 if (get_compat_timespec(&t, timeout))
614 ut = compat_alloc_user_space(sizeof(*ut));
615 if (copy_to_user(ut, &t, sizeof(t)) )
618 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
624 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
629 for (i = 0; i < nr; ++i) {
630 if (get_user(uptr, ptr32 + i))
632 if (put_user(compat_ptr(uptr), ptr64 + i))
638 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
641 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
643 struct iocb __user * __user *iocb64;
646 if (unlikely(nr < 0))
649 if (nr > MAX_AIO_SUBMITS)
650 nr = MAX_AIO_SUBMITS;
652 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
653 ret = copy_iocb(nr, iocb, iocb64);
655 ret = sys_io_submit(ctx_id, nr, iocb64);
659 struct compat_ncp_mount_data {
660 compat_int_t version;
661 compat_uint_t ncp_fd;
662 compat_uid_t mounted_uid;
663 compat_pid_t wdog_pid;
664 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
665 compat_uint_t time_out;
666 compat_uint_t retry_count;
670 compat_mode_t file_mode;
671 compat_mode_t dir_mode;
674 struct compat_ncp_mount_data_v4 {
675 compat_int_t version;
676 compat_ulong_t flags;
677 compat_ulong_t mounted_uid;
678 compat_long_t wdog_pid;
679 compat_uint_t ncp_fd;
680 compat_uint_t time_out;
681 compat_uint_t retry_count;
684 compat_ulong_t file_mode;
685 compat_ulong_t dir_mode;
688 static void *do_ncp_super_data_conv(void *raw_data)
690 int version = *(unsigned int *)raw_data;
693 struct compat_ncp_mount_data *c_n = raw_data;
694 struct ncp_mount_data *n = raw_data;
696 n->dir_mode = c_n->dir_mode;
697 n->file_mode = c_n->file_mode;
700 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
701 n->wdog_pid = c_n->wdog_pid;
702 n->mounted_uid = c_n->mounted_uid;
703 } else if (version == 4) {
704 struct compat_ncp_mount_data_v4 *c_n = raw_data;
705 struct ncp_mount_data_v4 *n = raw_data;
707 n->dir_mode = c_n->dir_mode;
708 n->file_mode = c_n->file_mode;
711 n->retry_count = c_n->retry_count;
712 n->time_out = c_n->time_out;
713 n->ncp_fd = c_n->ncp_fd;
714 n->wdog_pid = c_n->wdog_pid;
715 n->mounted_uid = c_n->mounted_uid;
716 n->flags = c_n->flags;
717 } else if (version != 5) {
724 struct compat_smb_mount_data {
725 compat_int_t version;
726 compat_uid_t mounted_uid;
729 compat_mode_t file_mode;
730 compat_mode_t dir_mode;
733 static void *do_smb_super_data_conv(void *raw_data)
735 struct smb_mount_data *s = raw_data;
736 struct compat_smb_mount_data *c_s = raw_data;
738 if (c_s->version != SMB_MOUNT_OLDVERSION)
740 s->dir_mode = c_s->dir_mode;
741 s->file_mode = c_s->file_mode;
744 s->mounted_uid = c_s->mounted_uid;
749 extern int copy_mount_options (const void __user *, unsigned long *);
751 #define SMBFS_NAME "smbfs"
752 #define NCPFS_NAME "ncpfs"
754 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
755 char __user * type, unsigned long flags,
758 unsigned long type_page;
759 unsigned long data_page;
760 unsigned long dev_page;
764 retval = copy_mount_options (type, &type_page);
768 dir_page = getname(dir_name);
769 retval = PTR_ERR(dir_page);
770 if (IS_ERR(dir_page))
773 retval = copy_mount_options (dev_name, &dev_page);
777 retval = copy_mount_options (data, &data_page);
784 if (!strcmp((char *)type_page, SMBFS_NAME)) {
785 do_smb_super_data_conv((void *)data_page);
786 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
787 do_ncp_super_data_conv((void *)data_page);
792 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
793 flags, (void*)data_page);
796 free_page(data_page);
802 free_page(type_page);
807 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
808 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
809 ~(sizeof(compat_long_t)-1))
811 struct compat_old_linux_dirent {
812 compat_ulong_t d_ino;
813 compat_ulong_t d_offset;
814 unsigned short d_namlen;
818 struct compat_readdir_callback {
819 struct compat_old_linux_dirent __user *dirent;
823 static int compat_fillonedir(void *__buf, const char *name, int namlen,
824 loff_t offset, ino_t ino, unsigned int d_type)
826 struct compat_readdir_callback *buf = __buf;
827 struct compat_old_linux_dirent __user *dirent;
832 dirent = buf->dirent;
833 if (!access_ok(VERIFY_WRITE, dirent,
834 (unsigned long)(dirent->d_name + namlen + 1) -
835 (unsigned long)dirent))
837 if ( __put_user(ino, &dirent->d_ino) ||
838 __put_user(offset, &dirent->d_offset) ||
839 __put_user(namlen, &dirent->d_namlen) ||
840 __copy_to_user(dirent->d_name, name, namlen) ||
841 __put_user(0, dirent->d_name + namlen))
845 buf->result = -EFAULT;
849 asmlinkage long compat_old_readdir(unsigned int fd,
850 struct compat_old_linux_dirent __user *dirent, unsigned int count)
854 struct compat_readdir_callback buf;
864 error = vfs_readdir(file, compat_fillonedir, &buf);
873 struct compat_linux_dirent {
874 compat_ulong_t d_ino;
875 compat_ulong_t d_off;
876 unsigned short d_reclen;
880 struct compat_getdents_callback {
881 struct compat_linux_dirent __user *current_dir;
882 struct compat_linux_dirent __user *previous;
887 static int compat_filldir(void *__buf, const char *name, int namlen,
888 loff_t offset, ino_t ino, unsigned int d_type)
890 struct compat_linux_dirent __user * dirent;
891 struct compat_getdents_callback *buf = __buf;
892 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
894 buf->error = -EINVAL; /* only used if we fail.. */
895 if (reclen > buf->count)
897 dirent = buf->previous;
899 if (__put_user(offset, &dirent->d_off))
902 dirent = buf->current_dir;
903 if (__put_user(ino, &dirent->d_ino))
905 if (__put_user(reclen, &dirent->d_reclen))
907 if (copy_to_user(dirent->d_name, name, namlen))
909 if (__put_user(0, dirent->d_name + namlen))
911 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
913 buf->previous = dirent;
914 dirent = (void __user *)dirent + reclen;
915 buf->current_dir = dirent;
916 buf->count -= reclen;
919 buf->error = -EFAULT;
923 asmlinkage long compat_sys_getdents(unsigned int fd,
924 struct compat_linux_dirent __user *dirent, unsigned int count)
927 struct compat_linux_dirent __user * lastdirent;
928 struct compat_getdents_callback buf;
932 if (!access_ok(VERIFY_WRITE, dirent, count))
940 buf.current_dir = dirent;
945 error = vfs_readdir(file, compat_filldir, &buf);
949 lastdirent = buf.previous;
951 if (put_user(file->f_pos, &lastdirent->d_off))
954 error = count - buf.count;
963 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
964 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
966 struct compat_getdents_callback64 {
967 struct linux_dirent64 __user *current_dir;
968 struct linux_dirent64 __user *previous;
973 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
974 ino_t ino, unsigned int d_type)
976 struct linux_dirent64 __user *dirent;
977 struct compat_getdents_callback64 *buf = __buf;
978 int jj = NAME_OFFSET(dirent);
979 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
982 buf->error = -EINVAL; /* only used if we fail.. */
983 if (reclen > buf->count)
985 dirent = buf->previous;
988 if (__put_user_unaligned(offset, &dirent->d_off))
991 dirent = buf->current_dir;
992 if (__put_user_unaligned(ino, &dirent->d_ino))
995 if (__put_user_unaligned(off, &dirent->d_off))
997 if (__put_user(reclen, &dirent->d_reclen))
999 if (__put_user(d_type, &dirent->d_type))
1001 if (copy_to_user(dirent->d_name, name, namlen))
1003 if (__put_user(0, dirent->d_name + namlen))
1005 buf->previous = dirent;
1006 dirent = (void __user *)dirent + reclen;
1007 buf->current_dir = dirent;
1008 buf->count -= reclen;
1011 buf->error = -EFAULT;
1015 asmlinkage long compat_sys_getdents64(unsigned int fd,
1016 struct linux_dirent64 __user * dirent, unsigned int count)
1019 struct linux_dirent64 __user * lastdirent;
1020 struct compat_getdents_callback64 buf;
1024 if (!access_ok(VERIFY_WRITE, dirent, count))
1032 buf.current_dir = dirent;
1033 buf.previous = NULL;
1037 error = vfs_readdir(file, compat_filldir64, &buf);
1041 lastdirent = buf.previous;
1043 typeof(lastdirent->d_off) d_off = file->f_pos;
1044 __put_user_unaligned(d_off, &lastdirent->d_off);
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 file = open_exec(filename);
1378 retval = PTR_ERR(file);
1385 bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
1388 memset(bprm, 0, sizeof(*bprm));
1390 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1392 bprm->filename = filename;
1393 bprm->interp = filename;
1394 bprm->mm = mm_alloc();
1398 retval = init_new_context(current, bprm->mm);
1402 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1403 if ((retval = bprm->argc) < 0)
1406 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1407 if ((retval = bprm->envc) < 0)
1410 retval = security_bprm_alloc(bprm);
1414 retval = prepare_binprm(bprm);
1418 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1422 bprm->exec = bprm->p;
1423 retval = compat_copy_strings(bprm->envc, envp, bprm);
1427 retval = compat_copy_strings(bprm->argc, argv, bprm);
1431 retval = search_binary_handler(bprm, regs);
1433 free_arg_pages(bprm);
1435 /* execve success */
1436 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);
1467 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1469 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1472 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1473 * 64-bit unsigned longs.
1476 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1477 unsigned long *fdset)
1479 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1483 if (verify_area(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1490 __get_user(l, ufdset);
1491 __get_user(h, ufdset+1);
1493 *fdset++ = h << 32 | l;
1497 __get_user(*fdset, ufdset);
1499 /* Tricky, must clear full unsigned long in the
1500 * kernel fdset at the end, this makes sure that
1503 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1509 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1510 unsigned long *fdset)
1513 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1524 __put_user(l, ufdset);
1525 __put_user(h, ufdset+1);
1530 __put_user(*fdset, ufdset);
1535 * This is a virtual copy of sys_select from fs/select.c and probably
1536 * should be compared to it from time to time
1538 static void *select_bits_alloc(int size)
1540 return kmalloc(6 * size, GFP_KERNEL);
1543 static void select_bits_free(void *bits, int size)
1549 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1550 * like to be certain this leads to no problems. So I return
1551 * EINTR just for safety.
1553 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1554 * I'm trying ERESTARTNOHAND which restart only when you want to.
1556 #define MAX_SELECT_SECONDS \
1557 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1560 compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp,
1561 compat_ulong_t __user *exp, struct compat_timeval __user *tvp)
1566 int ret, size, max_fdset;
1568 timeout = MAX_SCHEDULE_TIMEOUT;
1572 if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
1573 || (ret = __get_user(sec, &tvp->tv_sec))
1574 || (ret = __get_user(usec, &tvp->tv_usec)))
1578 if (sec < 0 || usec < 0)
1581 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1582 timeout = ROUND_UP(usec, 1000000/HZ);
1583 timeout += sec * (unsigned long) HZ;
1591 /* max_fdset can increase, so grab it once to avoid race */
1592 max_fdset = current->files->max_fdset;
1597 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1598 * since we used fdset we need to allocate memory in units of
1602 size = FDS_BYTES(n);
1603 bits = select_bits_alloc(size);
1606 fds.in = (unsigned long *) bits;
1607 fds.out = (unsigned long *) (bits + size);
1608 fds.ex = (unsigned long *) (bits + 2*size);
1609 fds.res_in = (unsigned long *) (bits + 3*size);
1610 fds.res_out = (unsigned long *) (bits + 4*size);
1611 fds.res_ex = (unsigned long *) (bits + 5*size);
1613 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1614 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1615 (ret = compat_get_fd_set(n, exp, fds.ex)))
1617 zero_fd_set(n, fds.res_in);
1618 zero_fd_set(n, fds.res_out);
1619 zero_fd_set(n, fds.res_ex);
1621 ret = do_select(n, &fds, &timeout);
1623 if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
1624 time_t sec = 0, usec = 0;
1627 usec = timeout % HZ;
1628 usec *= (1000000/HZ);
1630 if (put_user(sec, &tvp->tv_sec) ||
1631 put_user(usec, &tvp->tv_usec))
1638 ret = -ERESTARTNOHAND;
1639 if (signal_pending(current))
1644 compat_set_fd_set(n, inp, fds.res_in);
1645 compat_set_fd_set(n, outp, fds.res_out);
1646 compat_set_fd_set(n, exp, fds.res_ex);
1649 select_bits_free(bits, size);
1654 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1655 /* Stuff for NFS server syscalls... */
1656 struct compat_nfsctl_svc {
1661 struct compat_nfsctl_client {
1662 s8 cl32_ident[NFSCLNT_IDMAX+1];
1664 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1667 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1670 struct compat_nfsctl_export {
1671 char ex32_client[NFSCLNT_IDMAX+1];
1672 char ex32_path[NFS_MAXPATHLEN+1];
1673 compat_dev_t ex32_dev;
1674 compat_ino_t ex32_ino;
1675 compat_int_t ex32_flags;
1676 compat_uid_t ex32_anon_uid;
1677 compat_gid_t ex32_anon_gid;
1680 struct compat_nfsctl_fdparm {
1681 struct sockaddr gd32_addr;
1682 s8 gd32_path[NFS_MAXPATHLEN+1];
1683 compat_int_t gd32_version;
1686 struct compat_nfsctl_fsparm {
1687 struct sockaddr gd32_addr;
1688 s8 gd32_path[NFS_MAXPATHLEN+1];
1689 compat_int_t gd32_maxlen;
1692 struct compat_nfsctl_arg {
1693 compat_int_t ca32_version; /* safeguard */
1695 struct compat_nfsctl_svc u32_svc;
1696 struct compat_nfsctl_client u32_client;
1697 struct compat_nfsctl_export u32_export;
1698 struct compat_nfsctl_fdparm u32_getfd;
1699 struct compat_nfsctl_fsparm u32_getfs;
1701 #define ca32_svc u.u32_svc
1702 #define ca32_client u.u32_client
1703 #define ca32_export u.u32_export
1704 #define ca32_getfd u.u32_getfd
1705 #define ca32_getfs u.u32_getfs
1708 union compat_nfsctl_res {
1709 __u8 cr32_getfh[NFS_FHSIZE];
1710 struct knfsd_fh cr32_getfs;
1713 static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1717 err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
1718 err |= get_user(karg->ca_version, &arg->ca32_version);
1719 err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
1720 err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
1721 return (err) ? -EFAULT : 0;
1724 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1728 err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
1729 err |= get_user(karg->ca_version, &arg->ca32_version);
1730 err |= __copy_from_user(&karg->ca_client.cl_ident[0],
1731 &arg->ca32_client.cl32_ident[0],
1733 err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
1734 err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
1735 &arg->ca32_client.cl32_addrlist[0],
1736 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
1737 err |= __get_user(karg->ca_client.cl_fhkeytype,
1738 &arg->ca32_client.cl32_fhkeytype);
1739 err |= __get_user(karg->ca_client.cl_fhkeylen,
1740 &arg->ca32_client.cl32_fhkeylen);
1741 err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
1742 &arg->ca32_client.cl32_fhkey[0],
1745 return (err) ? -EFAULT : 0;
1748 static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1752 err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
1753 err |= get_user(karg->ca_version, &arg->ca32_version);
1754 err |= __copy_from_user(&karg->ca_export.ex_client[0],
1755 &arg->ca32_export.ex32_client[0],
1757 err |= __copy_from_user(&karg->ca_export.ex_path[0],
1758 &arg->ca32_export.ex32_path[0],
1760 err |= __get_user(karg->ca_export.ex_dev,
1761 &arg->ca32_export.ex32_dev);
1762 err |= __get_user(karg->ca_export.ex_ino,
1763 &arg->ca32_export.ex32_ino);
1764 err |= __get_user(karg->ca_export.ex_flags,
1765 &arg->ca32_export.ex32_flags);
1766 err |= __get_user(karg->ca_export.ex_anon_uid,
1767 &arg->ca32_export.ex32_anon_uid);
1768 err |= __get_user(karg->ca_export.ex_anon_gid,
1769 &arg->ca32_export.ex32_anon_gid);
1770 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1771 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1773 return (err) ? -EFAULT : 0;
1776 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1780 err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
1781 err |= get_user(karg->ca_version, &arg->ca32_version);
1782 err |= __copy_from_user(&karg->ca_getfd.gd_addr,
1783 &arg->ca32_getfd.gd32_addr,
1784 (sizeof(struct sockaddr)));
1785 err |= __copy_from_user(&karg->ca_getfd.gd_path,
1786 &arg->ca32_getfd.gd32_path,
1787 (NFS_MAXPATHLEN+1));
1788 err |= __get_user(karg->ca_getfd.gd_version,
1789 &arg->ca32_getfd.gd32_version);
1791 return (err) ? -EFAULT : 0;
1794 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1798 err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
1799 err |= get_user(karg->ca_version, &arg->ca32_version);
1800 err |= __copy_from_user(&karg->ca_getfs.gd_addr,
1801 &arg->ca32_getfs.gd32_addr,
1802 (sizeof(struct sockaddr)));
1803 err |= __copy_from_user(&karg->ca_getfs.gd_path,
1804 &arg->ca32_getfs.gd32_path,
1805 (NFS_MAXPATHLEN+1));
1806 err |= __get_user(karg->ca_getfs.gd_maxlen,
1807 &arg->ca32_getfs.gd32_maxlen);
1809 return (err) ? -EFAULT : 0;
1812 /* This really doesn't need translations, we are only passing
1813 * back a union which contains opaque nfs file handle data.
1815 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
1819 err = copy_to_user(res, kres, sizeof(*res));
1821 return (err) ? -EFAULT : 0;
1824 asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
1825 union compat_nfsctl_res __user *res)
1827 struct nfsctl_arg *karg;
1828 union nfsctl_res *kres;
1832 karg = kmalloc(sizeof(*karg), GFP_USER);
1833 kres = kmalloc(sizeof(*kres), GFP_USER);
1834 if(!karg || !kres) {
1841 err = compat_nfs_svc_trans(karg, arg);
1844 case NFSCTL_ADDCLIENT:
1845 err = compat_nfs_clnt_trans(karg, arg);
1848 case NFSCTL_DELCLIENT:
1849 err = compat_nfs_clnt_trans(karg, arg);
1853 case NFSCTL_UNEXPORT:
1854 err = compat_nfs_exp_trans(karg, arg);
1858 err = compat_nfs_getfd_trans(karg, arg);
1862 err = compat_nfs_getfs_trans(karg, arg);
1872 /* The __user pointer casts are valid because of the set_fs() */
1873 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
1879 if((cmd == NFSCTL_GETFD) ||
1880 (cmd == NFSCTL_GETFS))
1881 err = compat_nfs_getfh_res_trans(kres, res);
1889 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
1891 return sys_ni_syscall();