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ntfs: update in-memory, on-disk structures and headers

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Update the NTFS filesystem driver's in-memory and on-disk structures:

  - Introduce the  infrastructure and initial support for reparse
    points and EA attribute.
  - Refactor the core ntfs_inode and ntfs_volume structures to support
    new features such as iomap.
  - Remove the unnecessary types.h and endian.h headers.
  - Reorganize the comments in headers for better readability, including
    fixing warnings from checkpatch.pl.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
This commit is contained in:
Namjae Jeon
2026-02-13 10:36:38 +09:00
parent 1f662195db
commit 4079605199
25 changed files with 2769 additions and 2658 deletions
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113
fs/ntfs/runlist.h
View File

@@ -1,20 +1,18 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* runlist.h - Defines for runlist handling in NTFS Linux kernel driver.
* Part of the Linux-NTFS project.
* Defines for runlist handling in NTFS Linux kernel driver.
*
* Copyright (c) 2001-2005 Anton Altaparmakov
* Copyright (c) 2002 Richard Russon
* Copyright (c) 2025 LG Electronics Co., Ltd.
*/
#ifndef _LINUX_NTFS_RUNLIST_H
#define _LINUX_NTFS_RUNLIST_H
#include "types.h"
#include "layout.h"
#include "volume.h"
/**
/*
* runlist_element - in memory vcn to lcn mapping array element
* @vcn: starting vcn of the current array element
* @lcn: starting lcn of the current array element
@@ -24,65 +22,76 @@
*
* When lcn == -1 this means that the count vcns starting at vcn are not
* physically allocated (i.e. this is a hole / data is sparse).
*
* In memory vcn to lcn mapping structure element.
* @vcn: vcn = Starting virtual cluster number.
* @lcn: lcn = Starting logical cluster number.
* @length: Run length in clusters.
*/
typedef struct { /* In memory vcn to lcn mapping structure element. */
VCN vcn; /* vcn = Starting virtual cluster number. */
LCN lcn; /* lcn = Starting logical cluster number. */
s64 length; /* Run length in clusters. */
} runlist_element;
struct runlist_element {
s64 vcn;
s64 lcn;
s64 length;
};
/**
/*
* runlist - in memory vcn to lcn mapping array including a read/write lock
* @rl: pointer to an array of runlist elements
* @lock: read/write spinlock for serializing access to @rl
*
* @rl_hint: hint/cache pointing to the last accessed runlist element
*/
typedef struct {
runlist_element *rl;
struct runlist {
struct runlist_element *rl;
struct rw_semaphore lock;
} runlist;
size_t count;
int rl_hint;
};
static inline void ntfs_init_runlist(runlist *rl)
static inline void ntfs_init_runlist(struct runlist *rl)
{
rl->rl = NULL;
init_rwsem(&rl->lock);
rl->count = 0;
rl->rl_hint = -1;
}
typedef enum {
LCN_HOLE = -1, /* Keep this as highest value or die! */
LCN_RL_NOT_MAPPED = -2,
LCN_ENOENT = -3,
LCN_ENOMEM = -4,
LCN_EIO = -5,
} LCN_SPECIAL_VALUES;
extern runlist_element *ntfs_runlists_merge(runlist_element *drl,
runlist_element *srl);
extern runlist_element *ntfs_mapping_pairs_decompress(const ntfs_volume *vol,
const ATTR_RECORD *attr, runlist_element *old_rl);
extern LCN ntfs_rl_vcn_to_lcn(const runlist_element *rl, const VCN vcn);
#ifdef NTFS_RW
extern runlist_element *ntfs_rl_find_vcn_nolock(runlist_element *rl,
const VCN vcn);
extern int ntfs_get_size_for_mapping_pairs(const ntfs_volume *vol,
const runlist_element *rl, const VCN first_vcn,
const VCN last_vcn);
extern int ntfs_mapping_pairs_build(const ntfs_volume *vol, s8 *dst,
const int dst_len, const runlist_element *rl,
const VCN first_vcn, const VCN last_vcn, VCN *const stop_vcn);
extern int ntfs_rl_truncate_nolock(const ntfs_volume *vol,
runlist *const runlist, const s64 new_length);
int ntfs_rl_punch_nolock(const ntfs_volume *vol, runlist *const runlist,
const VCN start, const s64 length);
#endif /* NTFS_RW */
enum {
LCN_DELALLOC = -1,
LCN_HOLE = -2,
LCN_RL_NOT_MAPPED = -3,
LCN_ENOENT = -4,
LCN_ENOMEM = -5,
LCN_EIO = -6,
LCN_EINVAL = -7,
};
struct runlist_element *ntfs_runlists_merge(struct runlist *d_runlist,
struct runlist_element *srl, size_t s_rl_count,
size_t *new_rl_count);
struct runlist_element *ntfs_mapping_pairs_decompress(const struct ntfs_volume *vol,
const struct attr_record *attr, struct runlist *old_runlist,
size_t *new_rl_count);
s64 ntfs_rl_vcn_to_lcn(const struct runlist_element *rl, const s64 vcn);
struct runlist_element *ntfs_rl_find_vcn_nolock(struct runlist_element *rl, const s64 vcn);
int ntfs_get_size_for_mapping_pairs(const struct ntfs_volume *vol,
const struct runlist_element *rl, const s64 first_vcn,
const s64 last_vcn, int max_mp_size);
int ntfs_mapping_pairs_build(const struct ntfs_volume *vol, s8 *dst,
const int dst_len, const struct runlist_element *rl,
const s64 first_vcn, const s64 last_vcn, s64 *const stop_vcn,
struct runlist_element **stop_rl, unsigned int *de_cluster_count);
int ntfs_rl_truncate_nolock(const struct ntfs_volume *vol,
struct runlist *const runlist, const s64 new_length);
int ntfs_rl_sparse(struct runlist_element *rl);
s64 ntfs_rl_get_compressed_size(struct ntfs_volume *vol, struct runlist_element *rl);
struct runlist_element *ntfs_rl_insert_range(struct runlist_element *dst_rl, int dst_cnt,
struct runlist_element *src_rl, int src_cnt, size_t *new_cnt);
struct runlist_element *ntfs_rl_punch_hole(struct runlist_element *dst_rl, int dst_cnt,
s64 start_vcn, s64 len, struct runlist_element **punch_rl,
size_t *new_rl_cnt);
struct runlist_element *ntfs_rl_collapse_range(struct runlist_element *dst_rl, int dst_cnt,
s64 start_vcn, s64 len, struct runlist_element **punch_rl,
size_t *new_rl_cnt);
struct runlist_element *ntfs_rl_realloc(struct runlist_element *rl, int old_size,
int new_size);
#endif /* _LINUX_NTFS_RUNLIST_H */