sqfs_decompressor.h 1.2 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Copyright (C) 2020 Bootlin
  4. *
  5. * Author: Joao Marcos Costa <joaomarcos.costa@bootlin.com>
  6. */
  7. #ifndef SQFS_DECOMPRESSOR_H
  8. #define SQFS_DECOMPRESSOR_H
  9. #include <stdint.h>
  10. #include "sqfs_filesystem.h"
  11. #define SQFS_COMP_ZLIB 1
  12. #define SQFS_COMP_LZMA 2
  13. #define SQFS_COMP_LZO 3
  14. #define SQFS_COMP_XZ 4
  15. #define SQFS_COMP_LZ4 5
  16. #define SQFS_COMP_ZSTD 6
  17. /* LZMA does not support any compression options */
  18. struct squashfs_gzip_opts {
  19. u32 compression_level;
  20. u16 window_size;
  21. u16 strategies;
  22. };
  23. struct squashfs_xz_opts {
  24. u32 dictionary_size;
  25. u32 executable_filters;
  26. };
  27. struct squashfs_lz4_opts {
  28. u32 version;
  29. u32 flags;
  30. };
  31. struct squashfs_zstd_opts {
  32. u32 compression_level;
  33. };
  34. struct squashfs_lzo_opts {
  35. u32 algorithm;
  36. u32 level;
  37. };
  38. union squashfs_compression_opts {
  39. struct squashfs_gzip_opts *gzip;
  40. struct squashfs_xz_opts *xz;
  41. struct squashfs_lz4_opts *lz4;
  42. struct squashfs_zstd_opts *zstd;
  43. struct squashfs_lzo_opts *lzo;
  44. };
  45. int sqfs_decompress(struct squashfs_ctxt *ctxt, void *dest,
  46. unsigned long *dest_len, void *source, u32 src_len);
  47. int sqfs_decompressor_init(struct squashfs_ctxt *ctxt);
  48. void sqfs_decompressor_cleanup(struct squashfs_ctxt *ctxt);
  49. #endif /* SQFS_DECOMPRESSOR_H */