diff options
| -rw-r--r-- | Documentation/filesystems/f2fs.rst | 35 | ||||
| -rw-r--r-- | fs/f2fs/compress.c | 2 | ||||
| -rw-r--r-- | fs/f2fs/data.c | 2 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 30 | ||||
| -rw-r--r-- | fs/f2fs/segment.c | 2 | ||||
| -rw-r--r-- | fs/f2fs/super.c | 23 |
6 files changed, 91 insertions, 3 deletions
diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index 985ae7d35066..dae15c96e659 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -261,6 +261,13 @@ compress_extension=%s Support adding specified extension, so that f2fs can enab Note that, there is one reserved special extension '*', it can be set to enable compression for all files. compress_chksum Support verifying chksum of raw data in compressed cluster. +compress_mode=%s Control file compression mode. This supports "fs" and "user" + modes. In "fs" mode (default), f2fs does automatic compression + on the compression enabled files. In "user" mode, f2fs disables + the automaic compression and gives the user discretion of + choosing the target file and the timing. The user can do manual + compression/decompression on the compression enabled files using + ioctls. 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 @@ -811,6 +818,34 @@ Compress metadata layout:: | data length | data chksum | reserved | compressed data | +-------------+-------------+----------+----------------------------+ +Compression mode +-------------------------- + +f2fs supports "fs" and "user" compression modes with "compression_mode" mount option. +With this option, f2fs provides a choice to select the way how to compress the +compression enabled files (refer to "Compression implementation" section for how to +enable compression on a regular inode). + +1) compress_mode=fs +This is the default option. f2fs does automatic compression in the writeback of the +compression enabled files. + +2) compress_mode=user +This disables the automaic compression and gives the user discretion of choosing the +target file and the timing. The user can do manual compression/decompression on the +compression enabled files using F2FS_IOC_DECOMPRESS_FILE and F2FS_IOC_COMPRESS_FILE +ioctls like the below. + +To decompress a file, + +fd = open(filename, O_WRONLY, 0); +ret = ioctl(fd, F2FS_IOC_DECOMPRESS_FILE); + +To compress a file, + +fd = open(filename, O_WRONLY, 0); +ret = ioctl(fd, F2FS_IOC_COMPRESS_FILE); + NVMe Zoned Namespace devices ---------------------------- diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 7ec1592a0973..d23bebb6ccd3 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -944,7 +944,7 @@ int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) static bool cluster_may_compress(struct compress_ctx *cc) { - if (!f2fs_compressed_file(cc->inode)) + if (!f2fs_need_compress_data(cc->inode)) return false; if (f2fs_is_atomic_file(cc->inode)) return false; diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index bfe0d787c9e6..e85fd8f77f3f 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -3147,7 +3147,7 @@ static inline bool __should_serialize_io(struct inode *inode, if (IS_NOQUOTA(inode)) return false; - if (f2fs_compressed_file(inode)) + if (f2fs_need_compress_data(inode)) return true; if (wbc->sync_mode != WB_SYNC_ALL) return true; diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 4417f791dbc6..7c02b6d8465c 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -148,6 +148,7 @@ struct f2fs_mount_info { unsigned char compress_log_size; /* cluster log size */ bool compress_chksum; /* compressed data chksum */ unsigned char compress_ext_cnt; /* extension count */ + int compress_mode; /* compression mode */ unsigned char extensions[COMPRESS_EXT_NUM][F2FS_EXTENSION_LEN]; /* extensions */ }; @@ -677,6 +678,7 @@ enum { FI_COMPRESSED_FILE, /* indicate file's data can be compressed */ FI_COMPRESS_CORRUPT, /* indicate compressed cluster is corrupted */ FI_MMAP_FILE, /* indicate file was mmapped */ + FI_ENABLE_COMPRESS, /* enable compression in "user" compression mode */ FI_MAX, /* max flag, never be used */ }; @@ -1244,6 +1246,18 @@ enum fsync_mode { FSYNC_MODE_NOBARRIER, /* fsync behaves nobarrier based on posix */ }; +enum { + COMPR_MODE_FS, /* + * automatically compress compression + * enabled files + */ + COMPR_MODE_USER, /* + * automatical compression is disabled. + * user can control the file compression + * using ioctls + */ +}; + /* * this value is set in page as a private data which indicate that * the page is atomically written, and it is in inmem_pages list. @@ -2759,6 +2773,22 @@ static inline int f2fs_compressed_file(struct inode *inode) is_inode_flag_set(inode, FI_COMPRESSED_FILE); } +static inline bool f2fs_need_compress_data(struct inode *inode) +{ + int compress_mode = F2FS_OPTION(F2FS_I_SB(inode)).compress_mode; + + if (!f2fs_compressed_file(inode)) + return false; + + if (compress_mode == COMPR_MODE_FS) + return true; + else if (compress_mode == COMPR_MODE_USER && + is_inode_flag_set(inode, FI_ENABLE_COMPRESS)) + return true; + + return false; +} + static inline unsigned int addrs_per_inode(struct inode *inode) { unsigned int addrs = CUR_ADDRS_PER_INODE(inode) - diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c index bfc597037413..deca74cb17df 100644 --- a/fs/f2fs/segment.c +++ b/fs/f2fs/segment.c @@ -3261,7 +3261,7 @@ static int __get_segment_type_6(struct f2fs_io_info *fio) else return CURSEG_COLD_DATA; } - if (file_is_cold(inode) || f2fs_compressed_file(inode)) + if (file_is_cold(inode) || f2fs_need_compress_data(inode)) return CURSEG_COLD_DATA; if (file_is_hot(inode) || is_inode_flag_set(inode, FI_HOT_DATA) || diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 0ac4dbd6488a..c6a3365f4844 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -147,6 +147,7 @@ enum { Opt_compress_log_size, Opt_compress_extension, Opt_compress_chksum, + Opt_compress_mode, Opt_atgc, Opt_err, }; @@ -216,6 +217,7 @@ static match_table_t f2fs_tokens = { {Opt_compress_log_size, "compress_log_size=%u"}, {Opt_compress_extension, "compress_extension=%s"}, {Opt_compress_chksum, "compress_chksum"}, + {Opt_compress_mode, "compress_mode=%s"}, {Opt_atgc, "atgc"}, {Opt_err, NULL}, }; @@ -939,11 +941,26 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) case Opt_compress_chksum: F2FS_OPTION(sbi).compress_chksum = true; break; + case Opt_compress_mode: + name = match_strdup(&args[0]); + if (!name) + return -ENOMEM; + if (!strcmp(name, "fs")) { + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; + } else if (!strcmp(name, "user")) { + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_USER; + } else { + kfree(name); + return -EINVAL; + } + kfree(name); + break; #else case Opt_compress_algorithm: case Opt_compress_log_size: case Opt_compress_extension: case Opt_compress_chksum: + case Opt_compress_mode: f2fs_info(sbi, "compression options not supported"); break; #endif @@ -1532,6 +1549,11 @@ static inline void f2fs_show_compress_options(struct seq_file *seq, if (F2FS_OPTION(sbi).compress_chksum) seq_puts(seq, ",compress_chksum"); + + if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_FS) + seq_printf(seq, ",compress_mode=%s", "fs"); + else if (F2FS_OPTION(sbi).compress_mode == COMPR_MODE_USER) + seq_printf(seq, ",compress_mode=%s", "user"); } static int f2fs_show_options(struct seq_file *seq, struct dentry *root) @@ -1681,6 +1703,7 @@ static void default_options(struct f2fs_sb_info *sbi) F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4; F2FS_OPTION(sbi).compress_log_size = MIN_COMPRESS_LOG_SIZE; F2FS_OPTION(sbi).compress_ext_cnt = 0; + F2FS_OPTION(sbi).compress_mode = COMPR_MODE_FS; F2FS_OPTION(sbi).bggc_mode = BGGC_MODE_ON; sbi->sb->s_flags &= ~SB_INLINECRYPT; |