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| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-05-09 02:44:53 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-05-09 02:46:56 +0300 |
| commit | 7c35de4df1056a5a1fb4de042197b8f5b1033b61 (patch) | |
| tree | 44d235d68bdeeb597c516ec547ed8781b369a096 /fs/erofs/decompressor.c | |
| parent | d69189428d50c9a8de6475f3c8c241f86f4e764a (diff) | |
| download | linux-7c35de4df1056a5a1fb4de042197b8f5b1033b61.tar.xz | |
erofs: Zstandard compression support
Add Zstandard compression as the 4th supported algorithm since it
becomes more popular now and some end users have asked this for
quite a while [1][2].
Each EROFS physical cluster contains only one valid standard
Zstandard frame as described in [3] so that decompression can be
performed on a per-pcluster basis independently.
Currently, it just leverages multi-call stream decompression APIs with
internal sliding window buffers. One-shot or bufferless decompression
could be implemented later for even better performance if needed.
[1] https://github.com/erofs/erofs-utils/issues/6
[2] https://lore.kernel.org/r/Y08h+z6CZdnS1XBm@B-P7TQMD6M-0146.lan
[3] https://www.rfc-editor.org/rfc/rfc8478.txt
Acked-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240508234453.17896-1-xiang@kernel.org
Diffstat (limited to 'fs/erofs/decompressor.c')
| -rw-r--r-- | fs/erofs/decompressor.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/erofs/decompressor.c b/fs/erofs/decompressor.c index d2fe8130819e..9d85b6c11c6b 100644 --- a/fs/erofs/decompressor.c +++ b/fs/erofs/decompressor.c @@ -399,6 +399,13 @@ const struct z_erofs_decompressor erofs_decompressors[] = { .name = "deflate" }, #endif +#ifdef CONFIG_EROFS_FS_ZIP_ZSTD + [Z_EROFS_COMPRESSION_ZSTD] = { + .config = z_erofs_load_zstd_config, + .decompress = z_erofs_zstd_decompress, + .name = "zstd" + }, +#endif }; int z_erofs_parse_cfgs(struct super_block *sb, struct erofs_super_block *dsb) |