Messages in this thread Patch in this message | | | From | Chao Yu <> | Subject | [PATCH] f2fs: compress: support lz4hc compression | Date | Mon, 30 Nov 2020 19:26:48 +0800 |
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Add a new mount option "compress_lz4hc_clevel=%u" to enable lz4hc compress algorithm and specify the compress level of lz4hc.
Signed-off-by: Chao Yu <yuchao0@huawei.com> --- Documentation/filesystems/f2fs.rst | 2 ++ fs/f2fs/compress.c | 22 +++++++++++++++++----- fs/f2fs/f2fs.h | 8 ++++++++ fs/f2fs/inode.c | 4 ++++ fs/f2fs/super.c | 15 +++++++++++++++ 5 files changed, 46 insertions(+), 5 deletions(-)
diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index 8830a11a11be..cda30ea124ee 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -264,6 +264,8 @@ compress_chksum Support verifying chksum of raw data in compressed cluster. compress_cache Support to use address space of inner inode to cache compressed block, in order to improve cache hit ratio of random read. +compress_lz4hc_clevel Support to enable LZ4 high compression algorithm, compress + level range is [3, 16]. inlinecrypt When possible, encrypt/decrypt the contents of encrypted files using the blk-crypto framework rather than filesystem-layer encryption. This allows the use of diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 2ec34168adbb..233be7f71e48 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -253,17 +253,24 @@ static const struct f2fs_compress_ops f2fs_lzo_ops = { #ifdef CONFIG_F2FS_FS_LZ4 static int lz4_init_compress_ctx(struct compress_ctx *cc) { - cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), - LZ4_MEM_COMPRESS, GFP_NOFS); + unsigned int size; + + size = F2FS_I(cc->inode)->i_lz4hc_clevel ? + LZ4HC_MEM_COMPRESS : LZ4_MEM_COMPRESS; + + cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS); if (!cc->private) return -ENOMEM; /* * we do not change cc->clen to LZ4_compressBound(inputsize) to * adapt worst compress case, because lz4 compressor can handle - * output budget properly. + * output budget properly; for lz4hc case, keep it as it is. */ - cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; + if (F2FS_I(cc->inode)->i_lz4hc_clevel) + cc->clen = LZ4_compressBound(cc->rlen); + else + cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; return 0; } @@ -275,9 +282,14 @@ static void lz4_destroy_compress_ctx(struct compress_ctx *cc) static int lz4_compress_pages(struct compress_ctx *cc) { + unsigned char clevel = F2FS_I(cc->inode)->i_lz4hc_clevel; int len; - len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, + if (clevel) + len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen, + cc->clen, clevel, cc->private); + else + len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, cc->clen, cc->private); if (!len) return -EAGAIN; diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index d32065417616..d3d5583ea9e5 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -149,6 +149,7 @@ struct f2fs_mount_info { /* For compression */ unsigned char compress_algorithm; /* algorithm type */ unsigned char compress_log_size; /* cluster log size */ + unsigned char lz4hc_clevel; /* lz4hc compress level */ bool compress_chksum; /* compressed data chksum */ unsigned char compress_ext_cnt; /* extension count */ unsigned char extensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN]; /* extensions */ @@ -736,6 +737,10 @@ struct f2fs_inode_info { unsigned char i_log_cluster_size; /* log of cluster size */ unsigned short i_compress_flag; /* compress flag */ unsigned int i_cluster_size; /* cluster size */ + unsigned char i_lz4hc_clevel; /* + * lz4hc compress level, + * range: 3-16, disable: 0 + */ }; static inline void get_extent_info(struct extent_info *ext, @@ -3932,6 +3937,9 @@ static inline void set_compress_context(struct inode *inode) 1 << COMPRESS_CHKSUM : 0; F2FS_I(inode)->i_cluster_size = 1 << F2FS_I(inode)->i_log_cluster_size; + if (F2FS_I(inode)->i_compress_algorithm == COMPRESS_LZ4 && + F2FS_OPTION(sbi).lz4hc_clevel) + F2FS_I(inode)->i_lz4hc_clevel = F2FS_OPTION(sbi).lz4hc_clevel; F2FS_I(inode)->i_flags |= F2FS_COMPR_FL; set_inode_flag(inode, FI_COMPRESSED_FILE); stat_inc_compr_inode(inode); diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c index 39fad324ca52..98be4d87e067 100644 --- a/fs/f2fs/inode.c +++ b/fs/f2fs/inode.c @@ -461,6 +461,10 @@ static int do_read_inode(struct inode *inode) fi->i_compress_algorithm = ri->i_compress_algorithm; fi->i_log_cluster_size = ri->i_log_cluster_size; fi->i_compress_flag = le16_to_cpu(ri->i_compress_flag); + if (fi->i_compress_algorithm == COMPRESS_LZ4 && + F2FS_OPTION(sbi).lz4hc_clevel) + fi->i_lz4hc_clevel = + F2FS_OPTION(sbi).lz4hc_clevel; fi->i_cluster_size = 1 << fi->i_log_cluster_size; set_inode_flag(inode, FI_COMPRESSED_FILE); } diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index b0c6ef2df7b8..2cd7fcc400b8 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -25,6 +25,7 @@ #include <linux/quota.h> #include <linux/unicode.h> #include <linux/part_stat.h> +#include <linux/lz4.h> #include "f2fs.h" #include "node.h" @@ -148,6 +149,7 @@ enum { Opt_compress_extension, Opt_compress_chksum, Opt_compress_cache, + Opt_compress_lz4hc_clevel, Opt_atgc, Opt_err, }; @@ -218,6 +220,7 @@ static match_table_t f2fs_tokens = { {Opt_compress_extension, "compress_extension=%s"}, {Opt_compress_chksum, "compress_chksum"}, {Opt_compress_cache, "compress_cache"}, + {Opt_compress_lz4hc_clevel, "compress_lz4hc_clevel=%u"}, {Opt_atgc, "atgc"}, {Opt_err, NULL}, }; @@ -944,12 +947,20 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) case Opt_compress_cache: set_opt(sbi, COMPRESS_CACHE); break; + case Opt_compress_lz4hc_clevel: + if (args->from && match_int(args, &arg)) + return -EINVAL; + if (arg < LZ4HC_MIN_CLEVEL || arg > LZ4HC_MAX_CLEVEL) + return -EINVAL; + F2FS_OPTION(sbi).lz4hc_clevel = arg; + break; #else case Opt_compress_algorithm: case Opt_compress_log_size: case Opt_compress_extension: case Opt_compress_chksum: case Opt_compress_cache: + case Opt_compress_lz4hc_clevel: f2fs_info(sbi, "compression options not supported"); break; #endif @@ -1543,6 +1554,10 @@ static inline void f2fs_show_compress_options(struct seq_file *seq, if (test_opt(sbi, COMPRESS_CACHE)) seq_puts(seq, ",compress_cache"); + + if (F2FS_OPTION(sbi).lz4hc_clevel) + seq_printf(seq, ",compress_lz4hc_clevel=%u", + F2FS_OPTION(sbi).lz4hc_clevel); } static int f2fs_show_options(struct seq_file *seq, struct dentry *root) -- 2.26.2
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