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[23.128.96.18]) by mx.google.com with ESMTP id dn23si167734edb.27.2020.12.02.19.37.31; Wed, 02 Dec 2020 19:37:54 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729632AbgLCDdO (ORCPT + 99 others); Wed, 2 Dec 2020 22:33:14 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:8232 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727075AbgLCDdO (ORCPT ); Wed, 2 Dec 2020 22:33:14 -0500 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4CmhGN4t1xzkkjb; Thu, 3 Dec 2020 11:31:56 +0800 (CST) Received: from szvp000203569.huawei.com (10.120.216.130) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Thu, 3 Dec 2020 11:32:23 +0800 From: Chao Yu To: CC: , , , Chao Yu Subject: [PATCH v5] f2fs: compress: support compress level Date: Thu, 3 Dec 2020 11:31:04 +0800 Message-ID: <20201203033104.42484-1-yuchao0@huawei.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.120.216.130] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Expand 'compress_algorithm' mount option to accept parameter as format of :, by this way, it gives a way to allow user to do more specified config on lz4 and zstd compression level, then f2fs compression can provide higher compress ratio. In order to set compress level for lz4 algorithm, it needs to set CONFIG_LZ4HC_COMPRESS and CONFIG_F2FS_FS_LZ4HC config to enable lz4hc compress algorithm. Signed-off-by: Chao Yu --- v5: - avoid compile error if CONFIG_F2FS_FS_ZSTD is off. Documentation/filesystems/f2fs.rst | 5 +++ fs/f2fs/Kconfig | 9 ++++ fs/f2fs/compress.c | 40 +++++++++++++++-- fs/f2fs/f2fs.h | 9 ++++ fs/f2fs/super.c | 72 +++++++++++++++++++++++++++++- include/linux/f2fs_fs.h | 3 ++ 6 files changed, 133 insertions(+), 5 deletions(-) diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index fd413d319e93..eef683c3266f 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -249,6 +249,11 @@ checkpoint=%s[:%u[%]] Set to "disable" to turn off checkpointing. Set to "enabl This space is reclaimed once checkpoint=enable. compress_algorithm=%s Control compress algorithm, currently f2fs supports "lzo", "lz4", "zstd" and "lzo-rle" algorithm. +compress_algorithm=%s:%d Control compress algorithm and its compress level, now, only + "lz4" and "zstd" support compress level config. + level range + lz4 3 - 16 + zstd 1 - 22 compress_log_size=%u Support configuring compress cluster size, the size will be 4KB * (1 << %u), 16KB is minimum size, also it's default size. diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig index d13c5c6a9787..8134b145ae4f 100644 --- a/fs/f2fs/Kconfig +++ b/fs/f2fs/Kconfig @@ -119,6 +119,15 @@ config F2FS_FS_LZ4 help Support LZ4 compress algorithm, if unsure, say Y. +config F2FS_FS_LZ4HC + bool "LZ4HC compression support" + depends on F2FS_FS_COMPRESSION + depends on F2FS_FS_LZ4 + select LZ4HC_COMPRESS + default y + help + Support LZ4HC compress algorithm, if unsure, say Y. + config F2FS_FS_ZSTD bool "ZSTD compression support" depends on F2FS_FS_COMPRESSION diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index db82da311fe4..dfadbc78946c 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -254,8 +254,13 @@ 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; + unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> + COMPRESS_LEVEL_OFFSET; + + size = level ? LZ4HC_MEM_COMPRESS : LZ4_MEM_COMPRESS; + + cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS); if (!cc->private) return -ENOMEM; @@ -274,10 +279,34 @@ static void lz4_destroy_compress_ctx(struct compress_ctx *cc) cc->private = NULL; } +#ifdef CONFIG_F2FS_FS_LZ4HC +static int lz4hc_compress_pages(struct compress_ctx *cc) +{ + unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> + COMPRESS_LEVEL_OFFSET; + int len; + + if (level) + len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen, + cc->clen, level, cc->private); + else + len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, + cc->clen, cc->private); + if (!len) + return -EAGAIN; + + cc->clen = len; + return 0; +} +#endif + static int lz4_compress_pages(struct compress_ctx *cc) { int len; +#ifdef CONFIG_F2FS_FS_LZ4HC + return lz4hc_compress_pages(cc); +#endif len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, cc->clen, cc->private); if (!len) @@ -327,8 +356,13 @@ static int zstd_init_compress_ctx(struct compress_ctx *cc) ZSTD_CStream *stream; void *workspace; unsigned int workspace_size; + unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> + COMPRESS_LEVEL_OFFSET; + + if (!level) + level = F2FS_ZSTD_DEFAULT_CLEVEL; - params = ZSTD_getParams(F2FS_ZSTD_DEFAULT_CLEVEL, cc->rlen, 0); + params = ZSTD_getParams(level, cc->rlen, 0); workspace_size = ZSTD_CStreamWorkspaceBound(params.cParams); workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 377a2e2bf466..76edec7483f3 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -147,6 +147,7 @@ struct f2fs_mount_info { /* For compression */ unsigned char compress_algorithm; /* algorithm type */ unsigned char compress_log_size; /* cluster log size */ + unsigned char compress_level; /* compress level */ bool compress_chksum; /* compressed data chksum */ unsigned char compress_ext_cnt; /* extension count */ int compress_mode; /* compression mode */ @@ -736,6 +737,7 @@ struct f2fs_inode_info { atomic_t i_compr_blocks; /* # of compressed blocks */ unsigned char i_compress_algorithm; /* algorithm type */ unsigned char i_log_cluster_size; /* log of cluster size */ + unsigned char i_compress_level; /* compress level (lz4hc,zstd) */ unsigned short i_compress_flag; /* compress flag */ unsigned int i_cluster_size; /* cluster size */ }; @@ -1308,6 +1310,8 @@ struct compress_data { #define F2FS_COMPRESSED_PAGE_MAGIC 0xF5F2C000 +#define COMPRESS_LEVEL_OFFSET 8 + /* compress context */ struct compress_ctx { struct inode *inode; /* inode the context belong to */ @@ -3959,6 +3963,11 @@ 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).compress_level) + F2FS_I(inode)->i_compress_flag |= + F2FS_OPTION(sbi).compress_level << + COMPRESS_LEVEL_OFFSET; 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/super.c b/fs/f2fs/super.c index 8442333ca0e2..44ba870bb352 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -25,6 +25,8 @@ #include #include #include +#include +#include #include "f2fs.h" #include "node.h" @@ -466,6 +468,57 @@ static int f2fs_set_test_dummy_encryption(struct super_block *sb, return 0; } +#ifdef CONFIG_F2FS_FS_COMPRESSION +static int f2fs_compress_set_level(struct f2fs_sb_info *sbi, const char *str, + int type) +{ + unsigned int level; + int len; + + if (type == COMPRESS_LZ4) + len = 3; + else if (type == COMPRESS_ZSTD) + len = 4; + else + return 0; + + if (strlen(str) == len) + return 0; + + str += len; + + if (str[0] != ':') { + f2fs_info(sbi, "wrong format, e.g. :"); + return -EINVAL; + } + if (kstrtouint(str + 1, 10, &level)) + return -EINVAL; + if (type == COMPRESS_LZ4) { +#ifdef CONFIG_F2FS_FS_LZ4HC + if (level < LZ4HC_MIN_CLEVEL || level > LZ4HC_MAX_CLEVEL) { + f2fs_info(sbi, "invalid lz4hc compress level: %d", level); + return -EINVAL; + } +#else + f2fs_info(sbi, "doesn't support lz4hc compression"); + return 0; +#endif + } else if (type == COMPRESS_ZSTD) { +#ifdef CONFIG_F2FS_FS_ZSTD + if (!level || level > ZSTD_maxCLevel()) { + f2fs_info(sbi, "invalid zstd compress level: %d", level); + return -EINVAL; + } +#else + f2fs_info(sbi, "doesn't support zstd compression"); + return 0; +#endif + } + F2FS_OPTION(sbi).compress_level = level; + return 0; +} +#endif + static int parse_options(struct super_block *sb, char *options, bool is_remount) { struct f2fs_sb_info *sbi = F2FS_SB(sb); @@ -886,10 +939,22 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) if (!strcmp(name, "lzo")) { F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZO; - } else if (!strcmp(name, "lz4")) { + } else if (!strncmp(name, "lz4", 3)) { + ret = f2fs_compress_set_level(sbi, name, + COMPRESS_LZ4); + if (ret) { + kfree(name); + return -EINVAL; + } F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4; - } else if (!strcmp(name, "zstd")) { + } else if (!strncmp(name, "zstd", 4)) { + ret = f2fs_compress_set_level(sbi, name, + COMPRESS_ZSTD); + if (ret) { + kfree(name); + return -EINVAL; + } F2FS_OPTION(sbi).compress_algorithm = COMPRESS_ZSTD; } else if (!strcmp(name, "lzo-rle")) { @@ -1547,6 +1612,9 @@ static inline void f2fs_show_compress_options(struct seq_file *seq, } seq_printf(seq, ",compress_algorithm=%s", algtype); + if (!F2FS_OPTION(sbi).compress_level) + seq_printf(seq, ":%d", F2FS_OPTION(sbi).compress_level); + seq_printf(seq, ",compress_log_size=%u", F2FS_OPTION(sbi).compress_log_size); diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index 55be7afeee90..2dcc63fe8494 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -275,6 +275,9 @@ struct f2fs_inode { __u8 i_compress_algorithm; /* compress algorithm */ __u8 i_log_cluster_size; /* log of cluster size */ __le16 i_compress_flag; /* compress flag */ + /* 0 bit: chksum flag + * [10,15] bits: compress level + */ __le32 i_extra_end[0]; /* for attribute size calculation */ } __packed; __le32 i_addr[DEF_ADDRS_PER_INODE]; /* Pointers to data blocks */ -- 2.26.2