36695673b0
Move common FS-specific ioctls from linux/ext2_fs.h to linux/fs.h as FS_IOC_* and FS_IOC32_* and have the users of them use those as a base. Also move the GETFLAGS/SETFLAGS flags to linux/fs.h as FS_*_FL macros, and then have the other users use them as a base. Signed-Off-By: David Howells <dhowells@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
/*
|
|
* linux/fs/jfs/ioctl.c
|
|
*
|
|
* Copyright (C) 2006 Herbert Poetzl
|
|
* adapted from Remy Card's ext2/ioctl.c
|
|
*/
|
|
|
|
#include <linux/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, FS_NOATIME_FL},
|
|
{JFS_DIRSYNC_FL, FS_DIRSYNC_FL},
|
|
{JFS_SYNC_FL, FS_SYNC_FL},
|
|
{JFS_SECRM_FL, FS_SECRM_FL},
|
|
{JFS_UNRM_FL, FS_UNRM_FL},
|
|
{JFS_APPEND_FL, FS_APPEND_FL},
|
|
{JFS_IMMUTABLE_FL, FS_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;
|
|
}
|
|
}
|
|
|