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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* xattr.h - This file is part of libsquashfs
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SQFS_XATTR_H
#define SQFS_XATTR_H
#include "sqfs/predef.h"
typedef enum {
SQFS_XATTR_USER = 0,
SQFS_XATTR_TRUSTED = 1,
SQFS_XATTR_SECURITY = 2,
SQFS_XATTR_FLAG_OOL = 0x100,
SQFS_XATTR_PREFIX_MASK = 0xFF,
} E_SQFS_XATTR_TYPE;
struct sqfs_xattr_entry_t {
uint16_t type;
uint16_t size;
uint8_t key[];
};
struct sqfs_xattr_value_t {
uint32_t size;
uint8_t value[];
};
struct sqfs_xattr_id_t {
uint64_t xattr;
uint32_t count;
uint32_t size;
};
struct sqfs_xattr_id_table_t {
uint64_t xattr_table_start;
uint32_t xattr_ids;
uint32_t unused;
};
#ifdef __cplusplus
extern "C" {
#endif
/* Get a prefix string from the ID or NULL if unknown */
SQFS_API const char *sqfs_get_xattr_prefix(E_SQFS_XATTR_TYPE id);
/* Get id from xattr key prefix or -1 if not supported */
SQFS_API int sqfs_get_xattr_prefix_id(const char *key);
/* Check if a given xattr key can be encoded in squashfs at all. */
SQFS_API bool sqfs_has_xattr(const char *key);
SQFS_API int sqfs_xattr_reader_load_locations(sqfs_xattr_reader_t *xr);
SQFS_API void sqfs_xattr_reader_destroy(sqfs_xattr_reader_t *xr);
SQFS_API sqfs_xattr_reader_t *sqfs_xattr_reader_create(sqfs_file_t *file,
sqfs_super_t *super,
sqfs_compressor_t *cmp);
SQFS_API int sqfs_xattr_reader_get_desc(sqfs_xattr_reader_t *xr, uint32_t idx,
sqfs_xattr_id_t *desc);
SQFS_API int sqfs_xattr_reader_seek_kv(sqfs_xattr_reader_t *xr,
const sqfs_xattr_id_t *desc);
SQFS_API
int sqfs_xattr_reader_read_value(sqfs_xattr_reader_t *xr,
const sqfs_xattr_entry_t *key,
sqfs_xattr_value_t **val_out);
SQFS_API
int sqfs_xattr_reader_read_key(sqfs_xattr_reader_t *xr,
sqfs_xattr_entry_t **key_out);
#ifdef __cplusplus
}
#endif
#endif /* SQFS_XATTR_H */
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