111 строки
3.2 KiB
C
111 строки
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* mft.h - Defines for mft record handling in NTFS Linux kernel driver.
|
|
* Part of the Linux-NTFS project.
|
|
*
|
|
* Copyright (c) 2001-2004 Anton Altaparmakov
|
|
*/
|
|
|
|
#ifndef _LINUX_NTFS_MFT_H
|
|
#define _LINUX_NTFS_MFT_H
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/highmem.h>
|
|
#include <linux/pagemap.h>
|
|
|
|
#include "inode.h"
|
|
|
|
extern MFT_RECORD *map_mft_record(ntfs_inode *ni);
|
|
extern void unmap_mft_record(ntfs_inode *ni);
|
|
|
|
extern MFT_RECORD *map_extent_mft_record(ntfs_inode *base_ni, MFT_REF mref,
|
|
ntfs_inode **ntfs_ino);
|
|
|
|
static inline void unmap_extent_mft_record(ntfs_inode *ni)
|
|
{
|
|
unmap_mft_record(ni);
|
|
return;
|
|
}
|
|
|
|
#ifdef NTFS_RW
|
|
|
|
/**
|
|
* flush_dcache_mft_record_page - flush_dcache_page() for mft records
|
|
* @ni: ntfs inode structure of mft record
|
|
*
|
|
* Call flush_dcache_page() for the page in which an mft record resides.
|
|
*
|
|
* This must be called every time an mft record is modified, just after the
|
|
* modification.
|
|
*/
|
|
static inline void flush_dcache_mft_record_page(ntfs_inode *ni)
|
|
{
|
|
flush_dcache_page(ni->page);
|
|
}
|
|
|
|
extern void __mark_mft_record_dirty(ntfs_inode *ni);
|
|
|
|
/**
|
|
* mark_mft_record_dirty - set the mft record and the page containing it dirty
|
|
* @ni: ntfs inode describing the mapped mft record
|
|
*
|
|
* Set the mapped (extent) mft record of the (base or extent) ntfs inode @ni,
|
|
* as well as the page containing the mft record, dirty. Also, mark the base
|
|
* vfs inode dirty. This ensures that any changes to the mft record are
|
|
* written out to disk.
|
|
*
|
|
* NOTE: Do not do anything if the mft record is already marked dirty.
|
|
*/
|
|
static inline void mark_mft_record_dirty(ntfs_inode *ni)
|
|
{
|
|
if (!NInoTestSetDirty(ni))
|
|
__mark_mft_record_dirty(ni);
|
|
}
|
|
|
|
extern int ntfs_sync_mft_mirror(ntfs_volume *vol, const unsigned long mft_no,
|
|
MFT_RECORD *m, int sync);
|
|
|
|
extern int write_mft_record_nolock(ntfs_inode *ni, MFT_RECORD *m, int sync);
|
|
|
|
/**
|
|
* write_mft_record - write out a mapped (extent) mft record
|
|
* @ni: ntfs inode describing the mapped (extent) mft record
|
|
* @m: mapped (extent) mft record to write
|
|
* @sync: if true, wait for i/o completion
|
|
*
|
|
* This is just a wrapper for write_mft_record_nolock() (see mft.c), which
|
|
* locks the page for the duration of the write. This ensures that there are
|
|
* no race conditions between writing the mft record via the dirty inode code
|
|
* paths and via the page cache write back code paths or between writing
|
|
* neighbouring mft records residing in the same page.
|
|
*
|
|
* Locking the page also serializes us against ->readpage() if the page is not
|
|
* uptodate.
|
|
*
|
|
* On success, clean the mft record and return 0. On error, leave the mft
|
|
* record dirty and return -errno.
|
|
*/
|
|
static inline int write_mft_record(ntfs_inode *ni, MFT_RECORD *m, int sync)
|
|
{
|
|
struct page *page = ni->page;
|
|
int err;
|
|
|
|
BUG_ON(!page);
|
|
lock_page(page);
|
|
err = write_mft_record_nolock(ni, m, sync);
|
|
unlock_page(page);
|
|
return err;
|
|
}
|
|
|
|
extern bool ntfs_may_write_mft_record(ntfs_volume *vol,
|
|
const unsigned long mft_no, const MFT_RECORD *m,
|
|
ntfs_inode **locked_ni);
|
|
|
|
extern ntfs_inode *ntfs_mft_record_alloc(ntfs_volume *vol, const int mode,
|
|
ntfs_inode *base_ni, MFT_RECORD **mrec);
|
|
extern int ntfs_extent_mft_record_free(ntfs_inode *ni, MFT_RECORD *m);
|
|
|
|
#endif /* NTFS_RW */
|
|
|
|
#endif /* _LINUX_NTFS_MFT_H */
|