JFS: Add missing file from fa3241d2

/*

 * linux/fs/jfs/ioctl.c

 *

 * Copyright (C) 2006 Herbert Poetzl

 * adapted from Remy Card's ext2/ioctl.c

 */

#include <linux/fs.h>

#include <linux/ext2_fs.h>

#include <linux/ctype.h>

#include <linux/capability.h>

#include <linux/time.h>

#include <asm/current.h>

#include <asm/uaccess.h>

#include "jfs_incore.h"

#include "jfs_dinode.h"

#include "jfs_inode.h"

static struct {

	long jfs_flag;

	long ext2_flag;

} jfs_map[] = {

	{JFS_NOATIME_FL, EXT2_NOATIME_FL},

	{JFS_DIRSYNC_FL, EXT2_DIRSYNC_FL},

	{JFS_SYNC_FL, EXT2_SYNC_FL},

	{JFS_SECRM_FL, EXT2_SECRM_FL},

	{JFS_UNRM_FL, EXT2_UNRM_FL},

	{JFS_APPEND_FL, EXT2_APPEND_FL},

	{JFS_IMMUTABLE_FL, EXT2_IMMUTABLE_FL},

	{0, 0},

};

static long jfs_map_ext2(unsigned long flags, int from)

{

	int index=0;

	long mapped=0;

	while (jfs_map[index].jfs_flag) {

		if (from) {

			if (jfs_map[index].ext2_flag & flags)

				mapped |= jfs_map[index].jfs_flag;

		} else {

			if (jfs_map[index].jfs_flag & flags)

				mapped |= jfs_map[index].ext2_flag;

		}

		index++;

	}

	return mapped;

}

int jfs_ioctl(struct inode * inode, struct file * filp, unsigned int cmd,

		unsigned long arg)

{

	struct jfs_inode_info *jfs_inode = JFS_IP(inode);

	unsigned int flags;

	switch (cmd) {

	case JFS_IOC_GETFLAGS:

		flags = jfs_inode->mode2 & JFS_FL_USER_VISIBLE;

		flags = jfs_map_ext2(flags, 0);

		return put_user(flags, (int __user *) arg);

	case JFS_IOC_SETFLAGS: {

		unsigned int oldflags;

		if (IS_RDONLY(inode))

			return -EROFS;

		if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER))

			return -EACCES;

		if (get_user(flags, (int __user *) arg))

			return -EFAULT;

		flags = jfs_map_ext2(flags, 1);

		if (!S_ISDIR(inode->i_mode))

			flags &= ~JFS_DIRSYNC_FL;

		oldflags = jfs_inode->mode2;

		/*

		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by

		 * the relevant capability.

		 */

		if ((oldflags & JFS_IMMUTABLE_FL) ||

			((flags ^ oldflags) &

			(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {

			if (!capable(CAP_LINUX_IMMUTABLE))

				return -EPERM;

		}

		flags = flags & JFS_FL_USER_MODIFIABLE;

		flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;

		jfs_inode->mode2 = flags;

		jfs_set_inode_flags(inode);

		inode->i_ctime = CURRENT_TIME_SEC;

		mark_inode_dirty(inode);

		return 0;

	}

	default:

		return -ENOTTY;

	}

}