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 | kbuf->f_bavail) &
121 0xffffffff00000000ULL)
123 /* f_files and f_ffree may be -1; it's okay
124 * to stuff that into 32 bits */
125 if (kbuf->f_files != 0xffffffffffffffffULL
126 && (kbuf->f_files & 0xffffffff00000000ULL))
128 if (kbuf->f_ffree != 0xffffffffffffffffULL
129 && (kbuf->f_ffree & 0xffffffff00000000ULL))
132 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
133 __put_user(kbuf->f_type, &ubuf->f_type) ||
134 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
135 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
136 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
137 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
138 __put_user(kbuf->f_files, &ubuf->f_files) ||
139 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
140 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
141 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
142 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
143 __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
144 __put_user(0, &ubuf->f_spare[0]) ||
145 __put_user(0, &ubuf->f_spare[1]) ||
146 __put_user(0, &ubuf->f_spare[2]) ||
147 __put_user(0, &ubuf->f_spare[3]) ||
148 __put_user(0, &ubuf->f_spare[4]))
154 * The following statfs calls are copies of code from fs/open.c and
155 * should be checked against those from time to time
157 asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
162 error = user_path_walk(path, &nd);
165 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
166 if (!error && put_compat_statfs(buf, &tmp))
173 asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
183 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
184 if (!error && put_compat_statfs(buf, &tmp))
191 static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
193 if (sizeof ubuf->f_blocks == 4) {
194 if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail) &
195 0xffffffff00000000ULL)
197 /* f_files and f_ffree may be -1; it's okay
198 * to stuff that into 32 bits */
199 if (kbuf->f_files != 0xffffffffffffffffULL
200 && (kbuf->f_files & 0xffffffff00000000ULL))
202 if (kbuf->f_ffree != 0xffffffffffffffffULL
203 && (kbuf->f_ffree & 0xffffffff00000000ULL))
206 if (verify_area(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
207 __put_user(kbuf->f_type, &ubuf->f_type) ||
208 __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
209 __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
210 __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
211 __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
212 __put_user(kbuf->f_files, &ubuf->f_files) ||
213 __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
214 __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
215 __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
216 __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
217 __put_user(kbuf->f_frsize, &ubuf->f_frsize))
222 asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
227 if (sz != sizeof(*buf))
230 error = user_path_walk(path, &nd);
233 error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
234 if (!error && put_compat_statfs64(buf, &tmp))
241 asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
247 if (sz != sizeof(*buf))
254 error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
255 if (!error && put_compat_statfs64(buf, &tmp))
262 /* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
264 #define IOCTL_HASHSIZE 256
265 static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
266 static DECLARE_RWSEM(ioctl32_sem);
268 extern struct ioctl_trans ioctl_start[];
269 extern int ioctl_table_size;
271 static inline unsigned long ioctl32_hash(unsigned long cmd)
273 return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
276 static void ioctl32_insert_translation(struct ioctl_trans *trans)
279 struct ioctl_trans *t;
281 hash = ioctl32_hash (trans->cmd);
282 if (!ioctl32_hash_table[hash])
283 ioctl32_hash_table[hash] = trans;
285 t = ioctl32_hash_table[hash];
293 static int __init init_sys32_ioctl(void)
297 for (i = 0; i < ioctl_table_size; i++) {
298 if (ioctl_start[i].next != 0) {
299 printk("ioctl translation %d bad\n",i);
303 ioctl32_insert_translation(&ioctl_start[i]);
308 __initcall(init_sys32_ioctl);
310 int register_ioctl32_conversion(unsigned int cmd,
311 ioctl_trans_handler_t handler)
313 struct ioctl_trans *t;
314 struct ioctl_trans *new_t;
315 unsigned long hash = ioctl32_hash(cmd);
317 new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
321 down_write(&ioctl32_sem);
322 for (t = ioctl32_hash_table[hash]; t; t = t->next) {
324 printk(KERN_ERR "Trying to register duplicated ioctl32 "
325 "handler %x\n", cmd);
326 up_write(&ioctl32_sem);
333 new_t->handler = handler;
334 ioctl32_insert_translation(new_t);
336 up_write(&ioctl32_sem);
339 EXPORT_SYMBOL(register_ioctl32_conversion);
341 static inline int builtin_ioctl(struct ioctl_trans *t)
343 return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
347 This function cannot unregister duplicate ioctls, because they are not
349 When they happen we need to extend the prototype to pass the handler too. */
351 int unregister_ioctl32_conversion(unsigned int cmd)
353 unsigned long hash = ioctl32_hash(cmd);
354 struct ioctl_trans *t, *t1;
356 down_write(&ioctl32_sem);
358 t = ioctl32_hash_table[hash];
360 up_write(&ioctl32_sem);
365 if (builtin_ioctl(t)) {
366 printk("%p tried to unregister builtin ioctl %x\n",
367 __builtin_return_address(0), cmd);
369 ioctl32_hash_table[hash] = t->next;
370 up_write(&ioctl32_sem);
377 if (t1->cmd == cmd) {
378 if (builtin_ioctl(t1)) {
379 printk("%p tried to unregister builtin "
381 __builtin_return_address(0), cmd);
385 up_write(&ioctl32_sem);
392 printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
395 up_write(&ioctl32_sem);
398 EXPORT_SYMBOL(unregister_ioctl32_conversion);
400 asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
405 struct ioctl_trans *t;
411 if (!filp->f_op || !filp->f_op->ioctl) {
412 error = sys_ioctl (fd, cmd, arg);
416 down_read(&ioctl32_sem);
418 t = ioctl32_hash_table[ioctl32_hash (cmd)];
420 while (t && t->cmd != cmd)
425 error = t->handler(fd, cmd, arg, filp);
427 up_read(&ioctl32_sem);
429 up_read(&ioctl32_sem);
430 error = sys_ioctl(fd, cmd, arg);
433 up_read(&ioctl32_sem);
434 if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
435 error = siocdevprivate_ioctl(fd, cmd, arg);
443 path = (char *)__get_free_page(GFP_KERNEL);
445 /* find the name of the device. */
447 fn = d_path(filp->f_dentry,
448 filp->f_vfsmnt, path,
454 sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
455 if (!isprint(buf[1]))
456 sprintf(buf, "%02x", buf[1]);
457 printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
458 "cmd(%08x){%s} arg(%08x) on %s\n",
459 current->comm, current->pid,
460 (int)fd, (unsigned int)cmd, buf,
461 (unsigned int)arg, fn);
463 free_page((unsigned long)path);
474 static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
476 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
477 __get_user(kfl->l_type, &ufl->l_type) ||
478 __get_user(kfl->l_whence, &ufl->l_whence) ||
479 __get_user(kfl->l_start, &ufl->l_start) ||
480 __get_user(kfl->l_len, &ufl->l_len) ||
481 __get_user(kfl->l_pid, &ufl->l_pid))
486 static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
488 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
489 __put_user(kfl->l_type, &ufl->l_type) ||
490 __put_user(kfl->l_whence, &ufl->l_whence) ||
491 __put_user(kfl->l_start, &ufl->l_start) ||
492 __put_user(kfl->l_len, &ufl->l_len) ||
493 __put_user(kfl->l_pid, &ufl->l_pid))
498 #ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
499 static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
501 if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
502 __get_user(kfl->l_type, &ufl->l_type) ||
503 __get_user(kfl->l_whence, &ufl->l_whence) ||
504 __get_user(kfl->l_start, &ufl->l_start) ||
505 __get_user(kfl->l_len, &ufl->l_len) ||
506 __get_user(kfl->l_pid, &ufl->l_pid))
512 #ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
513 static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
515 if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
516 __put_user(kfl->l_type, &ufl->l_type) ||
517 __put_user(kfl->l_whence, &ufl->l_whence) ||
518 __put_user(kfl->l_start, &ufl->l_start) ||
519 __put_user(kfl->l_len, &ufl->l_len) ||
520 __put_user(kfl->l_pid, &ufl->l_pid))
526 asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
537 ret = get_compat_flock(&f, compat_ptr(arg));
542 ret = sys_fcntl(fd, cmd, (unsigned long)&f);
544 if (cmd == F_GETLK && ret == 0) {
545 if ((f.l_start >= COMPAT_OFF_T_MAX) ||
546 ((f.l_start + f.l_len) > COMPAT_OFF_T_MAX))
549 ret = put_compat_flock(&f, compat_ptr(arg));
556 ret = get_compat_flock64(&f, compat_ptr(arg));
561 ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
562 ((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
565 if (cmd == F_GETLK64 && ret == 0) {
566 if ((f.l_start >= COMPAT_LOFF_T_MAX) ||
567 ((f.l_start + f.l_len) > COMPAT_LOFF_T_MAX))
570 ret = put_compat_flock64(&f, compat_ptr(arg));
575 ret = sys_fcntl(fd, cmd, arg);
581 asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
584 if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
586 return compat_sys_fcntl64(fd, cmd, arg);
590 compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
595 mm_segment_t oldfs = get_fs();
596 if (unlikely(get_user(ctx64, ctx32p)))
600 /* The __user pointer cast is valid because of the set_fs() */
601 ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
603 /* truncating is ok because it's a user address */
605 ret = put_user((u32) ctx64, ctx32p);
610 compat_sys_io_getevents(aio_context_t ctx_id,
611 unsigned long min_nr,
613 struct io_event __user *events,
614 struct compat_timespec __user *timeout)
618 struct timespec __user *ut = NULL;
621 if (unlikely(!access_ok(VERIFY_WRITE, events,
622 nr * sizeof(struct io_event))))
625 if (get_compat_timespec(&t, timeout))
628 ut = compat_alloc_user_space(sizeof(*ut));
629 if (copy_to_user(ut, &t, sizeof(t)) )
632 ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
638 copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
643 for (i = 0; i < nr; ++i) {
644 if (get_user(uptr, ptr32 + i))
646 if (put_user(compat_ptr(uptr), ptr64 + i))
652 #define MAX_AIO_SUBMITS (PAGE_SIZE/sizeof(struct iocb *))
655 compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
657 struct iocb __user * __user *iocb64;
660 if (unlikely(nr < 0))
663 if (nr > MAX_AIO_SUBMITS)
664 nr = MAX_AIO_SUBMITS;
666 iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
667 ret = copy_iocb(nr, iocb, iocb64);
669 ret = sys_io_submit(ctx_id, nr, iocb64);
673 struct compat_ncp_mount_data {
674 compat_int_t version;
675 compat_uint_t ncp_fd;
676 compat_uid_t mounted_uid;
677 compat_pid_t wdog_pid;
678 unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
679 compat_uint_t time_out;
680 compat_uint_t retry_count;
684 compat_mode_t file_mode;
685 compat_mode_t dir_mode;
688 struct compat_ncp_mount_data_v4 {
689 compat_int_t version;
690 compat_ulong_t flags;
691 compat_ulong_t mounted_uid;
692 compat_long_t wdog_pid;
693 compat_uint_t ncp_fd;
694 compat_uint_t time_out;
695 compat_uint_t retry_count;
698 compat_ulong_t file_mode;
699 compat_ulong_t dir_mode;
702 static void *do_ncp_super_data_conv(void *raw_data)
704 int version = *(unsigned int *)raw_data;
707 struct compat_ncp_mount_data *c_n = raw_data;
708 struct ncp_mount_data *n = raw_data;
710 n->dir_mode = c_n->dir_mode;
711 n->file_mode = c_n->file_mode;
714 memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
715 n->wdog_pid = c_n->wdog_pid;
716 n->mounted_uid = c_n->mounted_uid;
717 } else if (version == 4) {
718 struct compat_ncp_mount_data_v4 *c_n = raw_data;
719 struct ncp_mount_data_v4 *n = raw_data;
721 n->dir_mode = c_n->dir_mode;
722 n->file_mode = c_n->file_mode;
725 n->retry_count = c_n->retry_count;
726 n->time_out = c_n->time_out;
727 n->ncp_fd = c_n->ncp_fd;
728 n->wdog_pid = c_n->wdog_pid;
729 n->mounted_uid = c_n->mounted_uid;
730 n->flags = c_n->flags;
731 } else if (version != 5) {
738 struct compat_smb_mount_data {
739 compat_int_t version;
740 compat_uid_t mounted_uid;
743 compat_mode_t file_mode;
744 compat_mode_t dir_mode;
747 static void *do_smb_super_data_conv(void *raw_data)
749 struct smb_mount_data *s = raw_data;
750 struct compat_smb_mount_data *c_s = raw_data;
752 if (c_s->version != SMB_MOUNT_OLDVERSION)
754 s->dir_mode = c_s->dir_mode;
755 s->file_mode = c_s->file_mode;
758 s->mounted_uid = c_s->mounted_uid;
763 extern int copy_mount_options (const void __user *, unsigned long *);
765 #define SMBFS_NAME "smbfs"
766 #define NCPFS_NAME "ncpfs"
768 asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
769 char __user * type, unsigned long flags,
772 unsigned long type_page;
773 unsigned long data_page;
774 unsigned long dev_page;
778 retval = copy_mount_options (type, &type_page);
782 dir_page = getname(dir_name);
783 retval = PTR_ERR(dir_page);
784 if (IS_ERR(dir_page))
787 retval = copy_mount_options (dev_name, &dev_page);
791 retval = copy_mount_options (data, &data_page);
798 if (!strcmp((char *)type_page, SMBFS_NAME)) {
799 do_smb_super_data_conv((void *)data_page);
800 } else if (!strcmp((char *)type_page, NCPFS_NAME)) {
801 do_ncp_super_data_conv((void *)data_page);
806 retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
807 flags, (void*)data_page);
810 free_page(data_page);
816 free_page(type_page);
821 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
822 #define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
823 ~(sizeof(compat_long_t)-1))
825 struct compat_old_linux_dirent {
826 compat_ulong_t d_ino;
827 compat_ulong_t d_offset;
828 unsigned short d_namlen;
832 struct compat_readdir_callback {
833 struct compat_old_linux_dirent __user *dirent;
837 static int compat_fillonedir(void *__buf, const char *name, int namlen,
838 loff_t offset, ino_t ino, unsigned int d_type)
840 struct compat_readdir_callback *buf = __buf;
841 struct compat_old_linux_dirent __user *dirent;
846 dirent = buf->dirent;
847 if (!access_ok(VERIFY_WRITE, dirent,
848 (unsigned long)(dirent->d_name + namlen + 1) -
849 (unsigned long)dirent))
851 if ( __put_user(ino, &dirent->d_ino) ||
852 __put_user(offset, &dirent->d_offset) ||
853 __put_user(namlen, &dirent->d_namlen) ||
854 __copy_to_user(dirent->d_name, name, namlen) ||
855 __put_user(0, dirent->d_name + namlen))
859 buf->result = -EFAULT;
863 asmlinkage long compat_sys_old_readdir(unsigned int fd,
864 struct compat_old_linux_dirent __user *dirent, unsigned int count)
868 struct compat_readdir_callback buf;
878 error = vfs_readdir(file, compat_fillonedir, &buf);
887 struct compat_linux_dirent {
888 compat_ulong_t d_ino;
889 compat_ulong_t d_off;
890 unsigned short d_reclen;
894 struct compat_getdents_callback {
895 struct compat_linux_dirent __user *current_dir;
896 struct compat_linux_dirent __user *previous;
901 static int compat_filldir(void *__buf, const char *name, int namlen,
902 loff_t offset, ino_t ino, unsigned int d_type)
904 struct compat_linux_dirent __user * dirent;
905 struct compat_getdents_callback *buf = __buf;
906 int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
908 buf->error = -EINVAL; /* only used if we fail.. */
909 if (reclen > buf->count)
911 dirent = buf->previous;
913 if (__put_user(offset, &dirent->d_off))
916 dirent = buf->current_dir;
917 if (__put_user(ino, &dirent->d_ino))
919 if (__put_user(reclen, &dirent->d_reclen))
921 if (copy_to_user(dirent->d_name, name, namlen))
923 if (__put_user(0, dirent->d_name + namlen))
925 if (__put_user(d_type, (char __user *) dirent + reclen - 1))
927 buf->previous = dirent;
928 dirent = (void __user *)dirent + reclen;
929 buf->current_dir = dirent;
930 buf->count -= reclen;
933 buf->error = -EFAULT;
937 asmlinkage long compat_sys_getdents(unsigned int fd,
938 struct compat_linux_dirent __user *dirent, unsigned int count)
941 struct compat_linux_dirent __user * lastdirent;
942 struct compat_getdents_callback buf;
946 if (!access_ok(VERIFY_WRITE, dirent, count))
954 buf.current_dir = dirent;
959 error = vfs_readdir(file, compat_filldir, &buf);
963 lastdirent = buf.previous;
965 if (put_user(file->f_pos, &lastdirent->d_off))
968 error = count - buf.count;
977 #ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
978 #define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
980 struct compat_getdents_callback64 {
981 struct linux_dirent64 __user *current_dir;
982 struct linux_dirent64 __user *previous;
987 static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
988 ino_t ino, unsigned int d_type)
990 struct linux_dirent64 __user *dirent;
991 struct compat_getdents_callback64 *buf = __buf;
992 int jj = NAME_OFFSET(dirent);
993 int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
996 buf->error = -EINVAL; /* only used if we fail.. */
997 if (reclen > buf->count)
999 dirent = buf->previous;
1002 if (__put_user_unaligned(offset, &dirent->d_off))
1005 dirent = buf->current_dir;
1006 if (__put_user_unaligned(ino, &dirent->d_ino))
1009 if (__put_user_unaligned(off, &dirent->d_off))
1011 if (__put_user(reclen, &dirent->d_reclen))
1013 if (__put_user(d_type, &dirent->d_type))
1015 if (copy_to_user(dirent->d_name, name, namlen))
1017 if (__put_user(0, dirent->d_name + namlen))
1019 buf->previous = dirent;
1020 dirent = (void __user *)dirent + reclen;
1021 buf->current_dir = dirent;
1022 buf->count -= reclen;
1025 buf->error = -EFAULT;
1029 asmlinkage long compat_sys_getdents64(unsigned int fd,
1030 struct linux_dirent64 __user * dirent, unsigned int count)
1033 struct linux_dirent64 __user * lastdirent;
1034 struct compat_getdents_callback64 buf;
1038 if (!access_ok(VERIFY_WRITE, dirent, count))
1046 buf.current_dir = dirent;
1047 buf.previous = NULL;
1051 error = vfs_readdir(file, compat_filldir64, &buf);
1055 lastdirent = buf.previous;
1057 typeof(lastdirent->d_off) d_off = file->f_pos;
1058 __put_user_unaligned(d_off, &lastdirent->d_off);
1059 error = count - buf.count;
1067 #endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
1069 static ssize_t compat_do_readv_writev(int type, struct file *file,
1070 const struct compat_iovec __user *uvector,
1071 unsigned long nr_segs, loff_t *pos)
1073 typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
1074 typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
1076 compat_ssize_t tot_len;
1077 struct iovec iovstack[UIO_FASTIOV];
1078 struct iovec *iov=iovstack, *vector;
1083 struct inode *inode;
1086 * SuS says "The readv() function *may* fail if the iovcnt argument
1087 * was less than or equal to 0, or greater than {IOV_MAX}. Linux has
1088 * traditionally returned zero for zero segments, so...
1095 * First get the "struct iovec" from user memory and
1096 * verify all the pointers
1099 if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
1103 if (nr_segs > UIO_FASTIOV) {
1105 iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
1110 if (verify_area(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
1114 * Single unix specification:
1115 * We should -EINVAL if an element length is not >= 0 and fitting an
1116 * ssize_t. The total length is fitting an ssize_t
1118 * Be careful here because iov_len is a size_t not an ssize_t
1123 for (seg = 0 ; seg < nr_segs; seg++) {
1124 compat_ssize_t tmp = tot_len;
1128 if (__get_user(len, &uvector->iov_len) ||
1129 __get_user(buf, &uvector->iov_base)) {
1133 if (len < 0) /* size_t not fitting an compat_ssize_t .. */
1136 if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
1138 vector->iov_base = compat_ptr(buf);
1139 vector->iov_len = (compat_size_t) len;
1148 inode = file->f_dentry->d_inode;
1149 /* VERIFY_WRITE actually means a read, as we write to user space */
1150 ret = locks_verify_area((type == READ
1151 ? FLOCK_VERIFY_READ : FLOCK_VERIFY_WRITE),
1152 inode, file, *pos, tot_len);
1158 fn = file->f_op->read;
1159 fnv = file->f_op->readv;
1161 fn = (io_fn_t)file->f_op->write;
1162 fnv = file->f_op->writev;
1165 ret = fnv(file, iov, nr_segs, pos);
1169 /* Do it by hand, with file-ops */
1172 while (nr_segs > 0) {
1177 base = vector->iov_base;
1178 len = vector->iov_len;
1182 nr = fn(file, base, len, pos);
1193 if (iov != iovstack)
1195 if ((ret + (type == READ)) > 0)
1196 dnotify_parent(file->f_dentry,
1197 (type == READ) ? DN_ACCESS : DN_MODIFY);
1202 compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1205 ssize_t ret = -EBADF;
1211 if (!(file->f_mode & FMODE_READ))
1215 if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
1218 ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
1226 compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
1229 ssize_t ret = -EBADF;
1234 if (!(file->f_mode & FMODE_WRITE))
1238 if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
1241 ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
1249 * compat_count() counts the number of arguments/envelopes. It is basically
1250 * a copy of count() from fs/exec.c, except that it works with 32 bit argv
1251 * and envp pointers.
1253 static int compat_count(compat_uptr_t __user *argv, int max)
1261 if (get_user(p, argv))
1274 * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
1275 * except that it works with 32 bit argv and envp pointers.
1277 static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
1278 struct linux_binprm *bprm)
1280 struct page *kmapped_page = NULL;
1284 while (argc-- > 0) {
1289 if (get_user(str, argv+argc) ||
1290 !(len = strnlen_user(compat_ptr(str), bprm->p))) {
1295 if (bprm->p < len) {
1301 /* XXX: add architecture specific overflow check here. */
1306 int offset, bytes_to_copy;
1309 offset = pos % PAGE_SIZE;
1311 page = bprm->page[i];
1314 page = alloc_page(GFP_HIGHUSER);
1315 bprm->page[i] = page;
1323 if (page != kmapped_page) {
1325 kunmap(kmapped_page);
1326 kmapped_page = page;
1327 kaddr = kmap(kmapped_page);
1330 memset(kaddr, 0, offset);
1331 bytes_to_copy = PAGE_SIZE - offset;
1332 if (bytes_to_copy > len) {
1333 bytes_to_copy = len;
1335 memset(kaddr+offset+len, 0,
1336 PAGE_SIZE-offset-len);
1338 err = copy_from_user(kaddr+offset, compat_ptr(str),
1345 pos += bytes_to_copy;
1346 str += bytes_to_copy;
1347 len -= bytes_to_copy;
1353 kunmap(kmapped_page);
1359 #define free_arg_pages(bprm) do { } while (0)
1363 static inline void free_arg_pages(struct linux_binprm *bprm)
1367 for (i = 0; i < MAX_ARG_PAGES; i++) {
1369 __free_page(bprm->page[i]);
1370 bprm->page[i] = NULL;
1374 #endif /* CONFIG_MMU */
1377 * compat_do_execve() is mostly a copy of do_execve(), with the exception
1378 * that it processes 32 bit argv and envp pointers.
1380 int compat_do_execve(char * filename,
1381 compat_uptr_t __user *argv,
1382 compat_uptr_t __user *envp,
1383 struct pt_regs * regs)
1385 struct linux_binprm *bprm;
1391 bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
1394 memset(bprm, 0, sizeof(*bprm));
1396 file = open_exec(filename);
1397 retval = PTR_ERR(file);
1403 bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
1405 bprm->filename = filename;
1406 bprm->interp = filename;
1407 bprm->mm = mm_alloc();
1412 retval = init_new_context(current, bprm->mm);
1416 bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
1417 if ((retval = bprm->argc) < 0)
1420 bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
1421 if ((retval = bprm->envc) < 0)
1424 retval = security_bprm_alloc(bprm);
1428 retval = prepare_binprm(bprm);
1432 retval = copy_strings_kernel(1, &bprm->filename, bprm);
1436 bprm->exec = bprm->p;
1437 retval = compat_copy_strings(bprm->envc, envp, bprm);
1441 retval = compat_copy_strings(bprm->argc, argv, bprm);
1445 retval = search_binary_handler(bprm, regs);
1447 free_arg_pages(bprm);
1449 /* execve success */
1450 security_bprm_free(bprm);
1456 /* Something went wrong, return the inode and free the argument pages*/
1457 for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
1458 struct page * page = bprm->page[i];
1464 security_bprm_free(bprm);
1472 allow_write_access(bprm->file);
1483 #define __COMPAT_NFDBITS (8 * sizeof(compat_ulong_t))
1485 #define ROUND_UP(x,y) (((x)+(y)-1)/(y))
1488 * Ooo, nasty. We need here to frob 32-bit unsigned longs to
1489 * 64-bit unsigned longs.
1492 int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1493 unsigned long *fdset)
1495 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1499 if (verify_area(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
1506 __get_user(l, ufdset);
1507 __get_user(h, ufdset+1);
1509 *fdset++ = h << 32 | l;
1513 __get_user(*fdset, ufdset);
1515 /* Tricky, must clear full unsigned long in the
1516 * kernel fdset at the end, this makes sure that
1519 memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
1525 void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
1526 unsigned long *fdset)
1529 nr = ROUND_UP(nr, __COMPAT_NFDBITS);
1540 __put_user(l, ufdset);
1541 __put_user(h, ufdset+1);
1546 __put_user(*fdset, ufdset);
1551 * This is a virtual copy of sys_select from fs/select.c and probably
1552 * should be compared to it from time to time
1554 static void *select_bits_alloc(int size)
1556 return kmalloc(6 * size, GFP_KERNEL);
1559 static void select_bits_free(void *bits, int size)
1565 * We can actually return ERESTARTSYS instead of EINTR, but I'd
1566 * like to be certain this leads to no problems. So I return
1567 * EINTR just for safety.
1569 * Update: ERESTARTSYS breaks at least the xview clock binary, so
1570 * I'm trying ERESTARTNOHAND which restart only when you want to.
1572 #define MAX_SELECT_SECONDS \
1573 ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
1576 compat_sys_select(int n, compat_ulong_t __user *inp, compat_ulong_t __user *outp,
1577 compat_ulong_t __user *exp, struct compat_timeval __user *tvp)
1582 int ret, size, max_fdset;
1584 timeout = MAX_SCHEDULE_TIMEOUT;
1588 if ((ret = verify_area(VERIFY_READ, tvp, sizeof(*tvp)))
1589 || (ret = __get_user(sec, &tvp->tv_sec))
1590 || (ret = __get_user(usec, &tvp->tv_usec)))
1594 if (sec < 0 || usec < 0)
1597 if ((unsigned long) sec < MAX_SELECT_SECONDS) {
1598 timeout = ROUND_UP(usec, 1000000/HZ);
1599 timeout += sec * (unsigned long) HZ;
1607 /* max_fdset can increase, so grab it once to avoid race */
1608 max_fdset = current->files->max_fdset;
1613 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
1614 * since we used fdset we need to allocate memory in units of
1618 size = FDS_BYTES(n);
1619 bits = select_bits_alloc(size);
1622 fds.in = (unsigned long *) bits;
1623 fds.out = (unsigned long *) (bits + size);
1624 fds.ex = (unsigned long *) (bits + 2*size);
1625 fds.res_in = (unsigned long *) (bits + 3*size);
1626 fds.res_out = (unsigned long *) (bits + 4*size);
1627 fds.res_ex = (unsigned long *) (bits + 5*size);
1629 if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
1630 (ret = compat_get_fd_set(n, outp, fds.out)) ||
1631 (ret = compat_get_fd_set(n, exp, fds.ex)))
1633 zero_fd_set(n, fds.res_in);
1634 zero_fd_set(n, fds.res_out);
1635 zero_fd_set(n, fds.res_ex);
1637 ret = do_select(n, &fds, &timeout);
1639 if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
1640 time_t sec = 0, usec = 0;
1643 usec = timeout % HZ;
1644 usec *= (1000000/HZ);
1646 if (put_user(sec, &tvp->tv_sec) ||
1647 put_user(usec, &tvp->tv_usec))
1654 ret = -ERESTARTNOHAND;
1655 if (signal_pending(current))
1660 compat_set_fd_set(n, inp, fds.res_in);
1661 compat_set_fd_set(n, outp, fds.res_out);
1662 compat_set_fd_set(n, exp, fds.res_ex);
1665 select_bits_free(bits, size);
1670 #if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
1671 /* Stuff for NFS server syscalls... */
1672 struct compat_nfsctl_svc {
1677 struct compat_nfsctl_client {
1678 s8 cl32_ident[NFSCLNT_IDMAX+1];
1680 struct in_addr cl32_addrlist[NFSCLNT_ADDRMAX];
1683 u8 cl32_fhkey[NFSCLNT_KEYMAX];
1686 struct compat_nfsctl_export {
1687 char ex32_client[NFSCLNT_IDMAX+1];
1688 char ex32_path[NFS_MAXPATHLEN+1];
1689 compat_dev_t ex32_dev;
1690 compat_ino_t ex32_ino;
1691 compat_int_t ex32_flags;
1692 compat_uid_t ex32_anon_uid;
1693 compat_gid_t ex32_anon_gid;
1696 struct compat_nfsctl_fdparm {
1697 struct sockaddr gd32_addr;
1698 s8 gd32_path[NFS_MAXPATHLEN+1];
1699 compat_int_t gd32_version;
1702 struct compat_nfsctl_fsparm {
1703 struct sockaddr gd32_addr;
1704 s8 gd32_path[NFS_MAXPATHLEN+1];
1705 compat_int_t gd32_maxlen;
1708 struct compat_nfsctl_arg {
1709 compat_int_t ca32_version; /* safeguard */
1711 struct compat_nfsctl_svc u32_svc;
1712 struct compat_nfsctl_client u32_client;
1713 struct compat_nfsctl_export u32_export;
1714 struct compat_nfsctl_fdparm u32_getfd;
1715 struct compat_nfsctl_fsparm u32_getfs;
1717 #define ca32_svc u.u32_svc
1718 #define ca32_client u.u32_client
1719 #define ca32_export u.u32_export
1720 #define ca32_getfd u.u32_getfd
1721 #define ca32_getfs u.u32_getfs
1724 union compat_nfsctl_res {
1725 __u8 cr32_getfh[NFS_FHSIZE];
1726 struct knfsd_fh cr32_getfs;
1729 static int compat_nfs_svc_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1733 err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
1734 err |= get_user(karg->ca_version, &arg->ca32_version);
1735 err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
1736 err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
1737 return (err) ? -EFAULT : 0;
1740 static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1744 err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
1745 err |= get_user(karg->ca_version, &arg->ca32_version);
1746 err |= __copy_from_user(&karg->ca_client.cl_ident[0],
1747 &arg->ca32_client.cl32_ident[0],
1749 err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
1750 err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
1751 &arg->ca32_client.cl32_addrlist[0],
1752 (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
1753 err |= __get_user(karg->ca_client.cl_fhkeytype,
1754 &arg->ca32_client.cl32_fhkeytype);
1755 err |= __get_user(karg->ca_client.cl_fhkeylen,
1756 &arg->ca32_client.cl32_fhkeylen);
1757 err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
1758 &arg->ca32_client.cl32_fhkey[0],
1761 return (err) ? -EFAULT : 0;
1764 static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1768 err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
1769 err |= get_user(karg->ca_version, &arg->ca32_version);
1770 err |= __copy_from_user(&karg->ca_export.ex_client[0],
1771 &arg->ca32_export.ex32_client[0],
1773 err |= __copy_from_user(&karg->ca_export.ex_path[0],
1774 &arg->ca32_export.ex32_path[0],
1776 err |= __get_user(karg->ca_export.ex_dev,
1777 &arg->ca32_export.ex32_dev);
1778 err |= __get_user(karg->ca_export.ex_ino,
1779 &arg->ca32_export.ex32_ino);
1780 err |= __get_user(karg->ca_export.ex_flags,
1781 &arg->ca32_export.ex32_flags);
1782 err |= __get_user(karg->ca_export.ex_anon_uid,
1783 &arg->ca32_export.ex32_anon_uid);
1784 err |= __get_user(karg->ca_export.ex_anon_gid,
1785 &arg->ca32_export.ex32_anon_gid);
1786 SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
1787 SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
1789 return (err) ? -EFAULT : 0;
1792 static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1796 err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
1797 err |= get_user(karg->ca_version, &arg->ca32_version);
1798 err |= __copy_from_user(&karg->ca_getfd.gd_addr,
1799 &arg->ca32_getfd.gd32_addr,
1800 (sizeof(struct sockaddr)));
1801 err |= __copy_from_user(&karg->ca_getfd.gd_path,
1802 &arg->ca32_getfd.gd32_path,
1803 (NFS_MAXPATHLEN+1));
1804 err |= __get_user(karg->ca_getfd.gd_version,
1805 &arg->ca32_getfd.gd32_version);
1807 return (err) ? -EFAULT : 0;
1810 static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
1814 err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
1815 err |= get_user(karg->ca_version, &arg->ca32_version);
1816 err |= __copy_from_user(&karg->ca_getfs.gd_addr,
1817 &arg->ca32_getfs.gd32_addr,
1818 (sizeof(struct sockaddr)));
1819 err |= __copy_from_user(&karg->ca_getfs.gd_path,
1820 &arg->ca32_getfs.gd32_path,
1821 (NFS_MAXPATHLEN+1));
1822 err |= __get_user(karg->ca_getfs.gd_maxlen,
1823 &arg->ca32_getfs.gd32_maxlen);
1825 return (err) ? -EFAULT : 0;
1828 /* This really doesn't need translations, we are only passing
1829 * back a union which contains opaque nfs file handle data.
1831 static int compat_nfs_getfh_res_trans(union nfsctl_res *kres, union compat_nfsctl_res __user *res)
1835 err = copy_to_user(res, kres, sizeof(*res));
1837 return (err) ? -EFAULT : 0;
1840 asmlinkage long compat_sys_nfsservctl(int cmd, struct compat_nfsctl_arg __user *arg,
1841 union compat_nfsctl_res __user *res)
1843 struct nfsctl_arg *karg;
1844 union nfsctl_res *kres;
1848 karg = kmalloc(sizeof(*karg), GFP_USER);
1849 kres = kmalloc(sizeof(*kres), GFP_USER);
1850 if(!karg || !kres) {
1857 err = compat_nfs_svc_trans(karg, arg);
1860 case NFSCTL_ADDCLIENT:
1861 err = compat_nfs_clnt_trans(karg, arg);
1864 case NFSCTL_DELCLIENT:
1865 err = compat_nfs_clnt_trans(karg, arg);
1869 case NFSCTL_UNEXPORT:
1870 err = compat_nfs_exp_trans(karg, arg);
1874 err = compat_nfs_getfd_trans(karg, arg);
1878 err = compat_nfs_getfs_trans(karg, arg);
1888 /* The __user pointer casts are valid because of the set_fs() */
1889 err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
1895 if((cmd == NFSCTL_GETFD) ||
1896 (cmd == NFSCTL_GETFS))
1897 err = compat_nfs_getfh_res_trans(kres, res);
1905 long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
1907 return sys_ni_syscall();