forked from Minki/linux
7c0f6ba682
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/*
|
|
* linux/fs/hfsplus/ioctl.c
|
|
*
|
|
* Copyright (C) 2003
|
|
* Ethan Benson <erbenson@alaska.net>
|
|
* partially derived from linux/fs/ext2/ioctl.c
|
|
* Copyright (C) 1993, 1994, 1995
|
|
* Remy Card (card@masi.ibp.fr)
|
|
* Laboratoire MASI - Institut Blaise Pascal
|
|
* Universite Pierre et Marie Curie (Paris VI)
|
|
*
|
|
* hfsplus ioctls
|
|
*/
|
|
|
|
#include <linux/capability.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/uaccess.h>
|
|
#include "hfsplus_fs.h"
|
|
|
|
/*
|
|
* "Blessing" an HFS+ filesystem writes metadata to the superblock informing
|
|
* the platform firmware which file to boot from
|
|
*/
|
|
static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags)
|
|
{
|
|
struct dentry *dentry = file->f_path.dentry;
|
|
struct inode *inode = d_inode(dentry);
|
|
struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb);
|
|
struct hfsplus_vh *vh = sbi->s_vhdr;
|
|
struct hfsplus_vh *bvh = sbi->s_backup_vhdr;
|
|
u32 cnid = (unsigned long)dentry->d_fsdata;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
mutex_lock(&sbi->vh_mutex);
|
|
|
|
/* Directory containing the bootable system */
|
|
vh->finder_info[0] = bvh->finder_info[0] =
|
|
cpu_to_be32(parent_ino(dentry));
|
|
|
|
/*
|
|
* Bootloader. Just using the inode here breaks in the case of
|
|
* hard links - the firmware wants the ID of the hard link file,
|
|
* but the inode points at the indirect inode
|
|
*/
|
|
vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(cnid);
|
|
|
|
/* Per spec, the OS X system folder - same as finder_info[0] here */
|
|
vh->finder_info[5] = bvh->finder_info[5] =
|
|
cpu_to_be32(parent_ino(dentry));
|
|
|
|
mutex_unlock(&sbi->vh_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
|
|
unsigned int flags = 0;
|
|
|
|
if (inode->i_flags & S_IMMUTABLE)
|
|
flags |= FS_IMMUTABLE_FL;
|
|
if (inode->i_flags & S_APPEND)
|
|
flags |= FS_APPEND_FL;
|
|
if (hip->userflags & HFSPLUS_FLG_NODUMP)
|
|
flags |= FS_NODUMP_FL;
|
|
|
|
return put_user(flags, user_flags);
|
|
}
|
|
|
|
static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
|
|
unsigned int flags, new_fl = 0;
|
|
int err = 0;
|
|
|
|
err = mnt_want_write_file(file);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (!inode_owner_or_capable(inode)) {
|
|
err = -EACCES;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
if (get_user(flags, user_flags)) {
|
|
err = -EFAULT;
|
|
goto out_drop_write;
|
|
}
|
|
|
|
inode_lock(inode);
|
|
|
|
if ((flags & (FS_IMMUTABLE_FL|FS_APPEND_FL)) ||
|
|
inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
|
|
if (!capable(CAP_LINUX_IMMUTABLE)) {
|
|
err = -EPERM;
|
|
goto out_unlock_inode;
|
|
}
|
|
}
|
|
|
|
/* don't silently ignore unsupported ext2 flags */
|
|
if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) {
|
|
err = -EOPNOTSUPP;
|
|
goto out_unlock_inode;
|
|
}
|
|
|
|
if (flags & FS_IMMUTABLE_FL)
|
|
new_fl |= S_IMMUTABLE;
|
|
|
|
if (flags & FS_APPEND_FL)
|
|
new_fl |= S_APPEND;
|
|
|
|
inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
|
|
|
|
if (flags & FS_NODUMP_FL)
|
|
hip->userflags |= HFSPLUS_FLG_NODUMP;
|
|
else
|
|
hip->userflags &= ~HFSPLUS_FLG_NODUMP;
|
|
|
|
inode->i_ctime = current_time(inode);
|
|
mark_inode_dirty(inode);
|
|
|
|
out_unlock_inode:
|
|
inode_unlock(inode);
|
|
out_drop_write:
|
|
mnt_drop_write_file(file);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
long hfsplus_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case HFSPLUS_IOC_EXT2_GETFLAGS:
|
|
return hfsplus_ioctl_getflags(file, argp);
|
|
case HFSPLUS_IOC_EXT2_SETFLAGS:
|
|
return hfsplus_ioctl_setflags(file, argp);
|
|
case HFSPLUS_IOC_BLESS:
|
|
return hfsplus_ioctl_bless(file, argp);
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|