linux/fs/ntfs3/record.c

// SPDX-License-Identifier: GPL-2.0
/*
 *
 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
 *
 */

#include <linux/fs.h>

#include "debug.h"
#include "ntfs.h"
#include "ntfs_fs.h"

static inline int compare_attr(const struct ATTRIB *left, enum ATTR_TYPE type,
			       const __le16 *name, u8 name_len,
			       const u16 *upcase)
{ … }

/*
 * mi_new_attt_id
 *
 * Return: Unused attribute id that is less than mrec->next_attr_id.
 */
static __le16 mi_new_attt_id(struct mft_inode *mi)
{ … }

int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi)
{ … }

void mi_put(struct mft_inode *mi)
{ … }

int mi_init(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno)
{ … }

/*
 * mi_read - Read MFT data.
 */
int mi_read(struct mft_inode *mi, bool is_mft)
{ … }

/*
 * mi_enum_attr - start/continue attributes enumeration in record.
 *
 * NOTE: mi->mrec - memory of size sbi->record_size
 * here we sure that mi->mrec->total == sbi->record_size (see mi_read)
 */
struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr)
{ … }

/*
 * mi_find_attr - Find the attribute by type and name and id.
 */
struct ATTRIB *mi_find_attr(struct mft_inode *mi, struct ATTRIB *attr,
			    enum ATTR_TYPE type, const __le16 *name,
			    u8 name_len, const __le16 *id)
{ … }

int mi_write(struct mft_inode *mi, int wait)
{ … }

int mi_format_new(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno,
		  __le16 flags, bool is_mft)
{ … }

/*
 * mi_insert_attr - Reserve space for new attribute.
 *
 * Return: Not full constructed attribute or NULL if not possible to create.
 */
struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
			      const __le16 *name, u8 name_len, u32 asize,
			      u16 name_off)
{ … }

/*
 * mi_remove_attr - Remove the attribute from record.
 *
 * NOTE: The source attr will point to next attribute.
 */
bool mi_remove_attr(struct ntfs_inode *ni, struct mft_inode *mi,
		    struct ATTRIB *attr)
{ … }

/* bytes = "new attribute size" - "old attribute size" */
bool mi_resize_attr(struct mft_inode *mi, struct ATTRIB *attr, int bytes)
{ … }

/*
 * Pack runs in MFT record.
 * If failed record is not changed.
 */
int mi_pack_runs(struct mft_inode *mi, struct ATTRIB *attr,
		 struct runs_tree *run, CLST len)
{ … }