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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Copyright (C) 2020 Bootlin
- *
- * Author: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
- */
- #ifndef SQFS_UTILS_H
- #define SQFS_UTILS_H
- #include <linux/bitops.h>
- #include <linux/kernel.h>
- #include <stdbool.h>
- #define SQFS_FRAGMENT_INDEX_OFFSET(A) ((A) % SQFS_MAX_ENTRIES)
- #define SQFS_FRAGMENT_INDEX(A) ((A) / SQFS_MAX_ENTRIES)
- #define SQFS_BLOCK_SIZE(A) ((A) & GENMASK(23, 0))
- #define SQFS_CHECK_FLAG(flag, bit) (((flag) >> (bit)) & 1)
- /* Useful for both fragment and data blocks */
- #define SQFS_COMPRESSED_BLOCK(A) (!((A) & BIT(24)))
- /* SQFS_COMPRESSED_DATA strictly used with super block's 'flags' member */
- #define SQFS_COMPRESSED_DATA(A) (!((A) & 0x0002))
- #define SQFS_IS_FRAGMENTED(A) ((A) != 0xFFFFFFFF)
- /*
- * These two macros work as getters for a metada block header, retrieving the
- * data size and if it is compressed/uncompressed
- */
- #define SQFS_COMPRESSED_METADATA(A) (!((A) & BIT(15)))
- #define SQFS_METADATA_SIZE(A) ((A) & GENMASK(14, 0))
- struct squashfs_super_block_flags {
- /* check: unused
- * uncompressed_ids: not supported
- */
- bool uncompressed_inodes;
- bool uncompressed_data;
- bool check;
- bool uncompressed_frags;
- bool no_frags;
- bool always_frags;
- bool duplicates;
- bool exportable;
- bool uncompressed_xattrs;
- bool no_xattrs;
- bool compressor_options;
- bool uncompressed_ids;
- };
- #endif /* SQFS_UTILS_H */
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