linux/fs/erofs/zmap.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2018-2019 HUAWEI, Inc.
 *             https://www.huawei.com/
 */
#include "internal.h"
#include <asm/unaligned.h>
#include <trace/events/erofs.h>

struct z_erofs_maprecorder { … };

static int z_erofs_load_full_lcluster(struct z_erofs_maprecorder *m,
				      unsigned long lcn)
{ … }

static unsigned int decode_compactedbits(unsigned int lobits,
					 u8 *in, unsigned int pos, u8 *type)
{ … }

static int get_compacted_la_distance(unsigned int lobits,
				     unsigned int encodebits,
				     unsigned int vcnt, u8 *in, int i)
{ … }

static int unpack_compacted_index(struct z_erofs_maprecorder *m,
				  unsigned int amortizedshift,
				  erofs_off_t pos, bool lookahead)
{ … }

static int z_erofs_load_compact_lcluster(struct z_erofs_maprecorder *m,
					 unsigned long lcn, bool lookahead)
{ … }

static int z_erofs_load_lcluster_from_disk(struct z_erofs_maprecorder *m,
					   unsigned int lcn, bool lookahead)
{ … }

static int z_erofs_extent_lookback(struct z_erofs_maprecorder *m,
				   unsigned int lookback_distance)
{ … }

static int z_erofs_get_extent_compressedlen(struct z_erofs_maprecorder *m,
					    unsigned int initial_lcn)
{ … }

static int z_erofs_get_extent_decompressedlen(struct z_erofs_maprecorder *m)
{ … }

static int z_erofs_do_map_blocks(struct inode *inode,
				 struct erofs_map_blocks *map, int flags)
{ … }

static int z_erofs_fill_inode_lazy(struct inode *inode)
{ … }

int z_erofs_map_blocks_iter(struct inode *inode, struct erofs_map_blocks *map,
			    int flags)
{ … }

static int z_erofs_iomap_begin_report(struct inode *inode, loff_t offset,
				loff_t length, unsigned int flags,
				struct iomap *iomap, struct iomap *srcmap)
{ … }

const struct iomap_ops z_erofs_iomap_report_ops = …;