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| author | Michele Dionisio <michele.dionisio@gmail.com> | 2019-05-15 23:02:02 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2019-07-08 19:43:53 +0200 |
| commit | eeabb9866e4ccce55d875cad140f9bf7c7ba1d66 (patch) | |
| tree | 2cb31e7a2c643f8b03a9abadb27e6fef3509c485 /fs/ubifs | |
| parent | 817aa094842dfc3a6b98c9582d4a647827f66201 (diff) | |
| download | linux-eeabb9866e4ccce55d875cad140f9bf7c7ba1d66.tar.gz | |
ubifs: Add support for zstd compression.
zstd shows a good compression rate and is faster than lzo, also on slow ARM cores. Cc: Sebastian Andrzej Siewior <sebastian@breakpoint.cc> Signed-off-by: Michele Dionisio <michele.dionisio@gmail.com> [rw: rewrote commit message] Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs')
| -rw-r--r-- | fs/ubifs/Kconfig | 10 | ||||
| -rw-r--r-- | fs/ubifs/compress.c | 27 | ||||
| -rw-r--r-- | fs/ubifs/super.c | 2 | ||||
| -rw-r--r-- | fs/ubifs/ubifs-media.h | 2 |
4 files changed, 40 insertions, 1 deletions
diff --git a/fs/ubifs/Kconfig b/fs/ubifs/Kconfig index 3902a677743e..69932bcfa920 100644 --- a/fs/ubifs/Kconfig +++ b/fs/ubifs/Kconfig @@ -6,8 +6,10 @@ config UBIFS_FS select CRYPTO if UBIFS_FS_ADVANCED_COMPR select CRYPTO if UBIFS_FS_LZO select CRYPTO if UBIFS_FS_ZLIB + select CRYPTO if UBIFS_FS_ZSTD select CRYPTO_LZO if UBIFS_FS_LZO select CRYPTO_DEFLATE if UBIFS_FS_ZLIB + select CRYPTO_ZSTD if UBIFS_FS_ZSTD select CRYPTO_HASH_INFO select UBIFS_FS_XATTR if FS_ENCRYPTION depends on MTD_UBI @@ -38,6 +40,14 @@ config UBIFS_FS_ZLIB help Zlib compresses better than LZO but it is slower. Say 'Y' if unsure. +config UBIFS_FS_ZSTD + bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR + depends on UBIFS_FS + default y + help + ZSTD compresses is a big win in speed over Zlib and + in compression ratio over LZO. Say 'Y' if unsure. + config UBIFS_ATIME_SUPPORT bool "Access time support" default n diff --git a/fs/ubifs/compress.c b/fs/ubifs/compress.c index 99c53ad11e93..3a92e6af69b2 100644 --- a/fs/ubifs/compress.c +++ b/fs/ubifs/compress.c @@ -59,6 +59,24 @@ static struct ubifs_compressor zlib_compr = { }; #endif +#ifdef CONFIG_UBIFS_FS_ZSTD +static DEFINE_MUTEX(zstd_enc_mutex); +static DEFINE_MUTEX(zstd_dec_mutex); + +static struct ubifs_compressor zstd_compr = { + .compr_type = UBIFS_COMPR_ZSTD, + .comp_mutex = &zstd_enc_mutex, + .decomp_mutex = &zstd_dec_mutex, + .name = "zstd", + .capi_name = "zstd", +}; +#else +static struct ubifs_compressor zstd_compr = { + .compr_type = UBIFS_COMPR_ZSTD, + .name = "zstd", +}; +#endif + /* All UBIFS compressors */ struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT]; @@ -216,13 +234,19 @@ int __init ubifs_compressors_init(void) if (err) return err; - err = compr_init(&zlib_compr); + err = compr_init(&zstd_compr); if (err) goto out_lzo; + err = compr_init(&zlib_compr); + if (err) + goto out_zstd; + ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr; return 0; +out_zstd: + compr_exit(&zstd_compr); out_lzo: compr_exit(&lzo_compr); return err; @@ -235,4 +259,5 @@ void ubifs_compressors_exit(void) { compr_exit(&lzo_compr); compr_exit(&zlib_compr); + compr_exit(&zstd_compr); } diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c index 13b8f68f6c24..5c472cca3876 100644 --- a/fs/ubifs/super.c +++ b/fs/ubifs/super.c @@ -1045,6 +1045,8 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options, c->mount_opts.compr_type = UBIFS_COMPR_LZO; else if (!strcmp(name, "zlib")) c->mount_opts.compr_type = UBIFS_COMPR_ZLIB; + else if (!strcmp(name, "zstd")) + c->mount_opts.compr_type = UBIFS_COMPR_ZSTD; else { ubifs_err(c, "unknown compressor \"%s\"", name); //FIXME: is c ready? kfree(name); diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h index 355d3081d882..3c9792cbb6ff 100644 --- a/fs/ubifs/ubifs-media.h +++ b/fs/ubifs/ubifs-media.h @@ -340,12 +340,14 @@ enum { * UBIFS_COMPR_NONE: no compression * UBIFS_COMPR_LZO: LZO compression * UBIFS_COMPR_ZLIB: ZLIB compression + * UBIFS_COMPR_ZSTD: ZSTD compression * UBIFS_COMPR_TYPES_CNT: count of supported compression types */ enum { UBIFS_COMPR_NONE, UBIFS_COMPR_LZO, UBIFS_COMPR_ZLIB, + UBIFS_COMPR_ZSTD, UBIFS_COMPR_TYPES_CNT, }; |