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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* xattr.h
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#ifndef SQFS_XATTR_H
#define SQFS_XATTR_H
#include "config.h"
#include "sqfs/compress.h"
#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
typedef enum {
SQUASHFS_XATTR_USER = 0,
SQUASHFS_XATTR_TRUSTED = 1,
SQUASHFS_XATTR_SECURITY = 2,
SQUASHFS_XATTR_FLAG_OOL = 0x100,
SQUASHFS_XATTR_PREFIX_MASK = 0xFF,
} E_SQFS_XATTR_TYPE;
typedef struct {
uint16_t type;
uint16_t size;
uint8_t key[];
} sqfs_xattr_entry_t;
typedef struct {
uint32_t size;
uint8_t value[];
} sqfs_xattr_value_t;
typedef struct {
uint64_t xattr;
uint32_t count;
uint32_t size;
} sqfs_xattr_id_t;
typedef struct {
uint64_t xattr_table_start;
uint32_t xattr_ids;
uint32_t unused;
} sqfs_xattr_id_table_t;
typedef struct xattr_reader_t xattr_reader_t;
#ifdef __cplusplus
extern "C" {
#endif
/* Get a prefix string from the ID or NULL if unknown */
const char *sqfs_get_xattr_prefix(E_SQFS_XATTR_TYPE id);
/* Get id from xattr key prefix or -1 if not supported */
int sqfs_get_xattr_prefix_id(const char *key);
/* Check if a given xattr key can be encoded in squashfs at all. */
bool sqfs_has_xattr(const char *key);
void xattr_reader_destroy(xattr_reader_t *xr);
xattr_reader_t *xattr_reader_create(int sqfsfd, sqfs_super_t *super,
compressor_t *cmp);
int xattr_reader_get_desc(xattr_reader_t *xr, uint32_t idx,
sqfs_xattr_id_t *desc);
int xattr_reader_seek_kv(xattr_reader_t *xr, const sqfs_xattr_id_t *desc);
sqfs_xattr_value_t *xattr_reader_read_value(xattr_reader_t *xr,
const sqfs_xattr_entry_t *key);
sqfs_xattr_entry_t *xattr_reader_read_key(xattr_reader_t *xr);
#ifdef __cplusplus
}
#endif
#endif /* SQFS_XATTR_H */
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