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| author | Chao Yu <yuchao0@huawei.com> | 2020-04-08 14:56:32 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2020-05-12 06:36:46 +0300 |
| commit | 6d92b201035dfe77426f8814fd5259db385a18b3 (patch) | |
| tree | db469dfc8a3f81374c5e212035ea34fc58d83ac7 /fs/f2fs/compress.c | |
| parent | 5e6bbde95982300d66d78fb282d4ee39df78fc33 (diff) | |
| download | linux-6d92b201035dfe77426f8814fd5259db385a18b3.tar.xz | |
f2fs: compress: support lzo-rle compress algorithm
LZO-RLE extension (run length encoding) was introduced to improve
performance of LZO algorithm in scenario of data contains many zeros,
zram has changed to use this extended algorithm by default, this
patch adds to support this algorithm extension, to enable this
extension, it needs to enable F2FS_FS_LZO and F2FS_FS_LZORLE config,
and specifies "compress_algorithm=lzo-rle" mountoption.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/compress.c')
| -rw-r--r-- | fs/f2fs/compress.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 230ea7cd1510..c7c5a8f8a48c 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -442,6 +442,31 @@ static const struct f2fs_compress_ops f2fs_zstd_ops = { }; #endif +#ifdef CONFIG_F2FS_FS_LZO +#ifdef CONFIG_F2FS_FS_LZORLE +static int lzorle_compress_pages(struct compress_ctx *cc) +{ + int ret; + + ret = lzorle1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, + &cc->clen, cc->private); + if (ret != LZO_E_OK) { + printk_ratelimited("%sF2FS-fs (%s): lzo-rle compress failed, ret:%d\n", + KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); + return -EIO; + } + return 0; +} + +static const struct f2fs_compress_ops f2fs_lzorle_ops = { + .init_compress_ctx = lzo_init_compress_ctx, + .destroy_compress_ctx = lzo_destroy_compress_ctx, + .compress_pages = lzorle_compress_pages, + .decompress_pages = lzo_decompress_pages, +}; +#endif +#endif + static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = { #ifdef CONFIG_F2FS_FS_LZO &f2fs_lzo_ops, @@ -458,6 +483,11 @@ static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = { #else NULL, #endif +#if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE) + &f2fs_lzorle_ops, +#else + NULL, +#endif }; bool f2fs_is_compress_backend_ready(struct inode *inode) |