github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-31 10:33:41 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

fs/ntfs3: implement NTFS3_IOC_SHUTDOWN ioctl

Browse Source 
Add support for the NTFS3_IOC_SHUTDOWN ioctl, allowing userspace to
request a filesystem shutdown. The ioctl number is shared with other
filesystems such as ext4, exfat, and f2fs.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
This commit is contained in:
Konstantin Komarov 2025-10-30 23:41:01 +03:00
parent 2109b08024
commit ae91dfe389
No known key found for this signature in database
GPG Key ID: A9B0331F832407B6
1 changed files with 43 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
fs/ntfs3/file.c
View File

@ -19,6 +19,12 @@
#include "ntfs.h"
#include "ntfs_fs.h"
/*
* cifx, btrfs, exfat, ext4, f2fs use this constant.
* Hope this value will become common to all fs.
*/
#define NTFS3_IOC_SHUTDOWN _IOR('X', 125, __u32)
static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
{
struct fstrim_range __user *user_range;
@ -73,13 +79,47 @@ static int ntfs_ioctl_set_volume_label(struct ntfs_sb_info *sbi, u8 __user *buf)
return ntfs_set_label(sbi, user, len);
}
/*
* ntfs_force_shutdown - helper function. Called from ioctl
*/
static int ntfs_force_shutdown(struct super_block *sb, u32 flags)
{
int err;
struct ntfs_sb_info *sbi = sb->s_fs_info;
if (unlikely(ntfs3_forced_shutdown(sb)))
return 0;
/* No additional options yet (flags). */
err = bdev_freeze(sb->s_bdev);
if (err)
return err;
set_bit(NTFS_FLAGS_SHUTDOWN_BIT, &sbi->flags);
bdev_thaw(sb->s_bdev);
return 0;
}
static int ntfs_ioctl_shutdown(struct super_block *sb, unsigned long arg)
{
u32 flags;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (get_user(flags, (__u32 __user *)arg))
return -EFAULT;
return ntfs_force_shutdown(sb, flags);
}
/*
* ntfs_ioctl - file_operations::unlocked_ioctl
*/
long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
struct super_block *sb = inode->i_sb;
struct ntfs_sb_info *sbi = sb->s_fs_info;
/* Avoid any operation if inode is bad. */
if (unlikely(is_bad_ni(ntfs_i(inode))))
@ -92,6 +132,8 @@ long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
return ntfs_ioctl_get_volume_label(sbi, (u8 __user *)arg);
case FS_IOC_SETFSLABEL:
return ntfs_ioctl_set_volume_label(sbi, (u8 __user *)arg);
case NTFS3_IOC_SHUTDOWN:
return ntfs_ioctl_shutdown(sb, arg);
}
return -ENOTTY; /* Inappropriate ioctl for device. */
}