diff options
| author | Geliang Tang <geliangtang@gmail.com> | 2018-08-01 19:23:37 +0800 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2018-08-03 18:12:18 -0700 |
| commit | 1021bcf44d0e876b10f8739594ad7e6e9c746026 (patch) | |
| tree | 3f21bc5e070760cfd7e3bf9f229676e76d64f90e /fs/pstore | |
| parent | 7daf201d7fe8334e2d2364d4e8ed3394ec9af819 (diff) | |
| download | lwn-1021bcf44d0e876b10f8739594ad7e6e9c746026.tar.gz lwn-1021bcf44d0e876b10f8739594ad7e6e9c746026.zip | |
pstore: add zstd compression support
This patch added the 6th compression algorithm support for pstore: zstd.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/pstore')
| -rw-r--r-- | fs/pstore/Kconfig | 17 | ||||
| -rw-r--r-- | fs/pstore/platform.c | 16 |
2 files changed, 30 insertions, 3 deletions
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index 09c19ef91526..503086f7f7c1 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -50,12 +50,19 @@ config PSTORE_842_COMPRESS help This option enables 842 compression algorithm support. +config PSTORE_ZSTD_COMPRESS + bool "zstd compression" + depends on PSTORE + select CRYPTO_ZSTD + help + This option enables zstd compression algorithm support. + config PSTORE_COMPRESS def_bool y depends on PSTORE depends on PSTORE_DEFLATE_COMPRESS || PSTORE_LZO_COMPRESS || \ PSTORE_LZ4_COMPRESS || PSTORE_LZ4HC_COMPRESS || \ - PSTORE_842_COMPRESS + PSTORE_842_COMPRESS || PSTORE_ZSTD_COMPRESS choice prompt "Default pstore compression algorithm" @@ -65,8 +72,8 @@ choice This change be changed at boot with "pstore.compress=..." on the kernel command line. - Currently, pstore has support for 5 compression algorithms: - deflate, lzo, lz4, lz4hc and 842. + Currently, pstore has support for 6 compression algorithms: + deflate, lzo, lz4, lz4hc, 842 and zstd. The default compression algorithm is deflate. @@ -85,6 +92,9 @@ choice config PSTORE_842_COMPRESS_DEFAULT bool "842" if PSTORE_842_COMPRESS + config PSTORE_ZSTD_COMPRESS_DEFAULT + bool "zstd" if PSTORE_ZSTD_COMPRESS + endchoice config PSTORE_COMPRESS_DEFAULT @@ -95,6 +105,7 @@ config PSTORE_COMPRESS_DEFAULT default "lz4" if PSTORE_LZ4_COMPRESS_DEFAULT default "lz4hc" if PSTORE_LZ4HC_COMPRESS_DEFAULT default "842" if PSTORE_842_COMPRESS_DEFAULT + default "zstd" if PSTORE_ZSTD_COMPRESS_DEFAULT config PSTORE_CONSOLE bool "Log kernel console messages" diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index c238ab8ba31d..15e99d5a681d 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -34,6 +34,9 @@ #if IS_ENABLED(CONFIG_PSTORE_LZ4_COMPRESS) || IS_ENABLED(CONFIG_PSTORE_LZ4HC_COMPRESS) #include <linux/lz4.h> #endif +#if IS_ENABLED(CONFIG_PSTORE_ZSTD_COMPRESS) +#include <linux/zstd.h> +#endif #include <linux/crypto.h> #include <linux/string.h> #include <linux/timer.h> @@ -192,6 +195,13 @@ static int zbufsize_842(size_t size) } #endif +#if IS_ENABLED(CONFIG_PSTORE_ZSTD_COMPRESS) +static int zbufsize_zstd(size_t size) +{ + return ZSTD_compressBound(size); +} +#endif + static const struct pstore_zbackend *zbackend __ro_after_init; static const struct pstore_zbackend zbackends[] = { @@ -225,6 +235,12 @@ static const struct pstore_zbackend zbackends[] = { .name = "842", }, #endif +#if IS_ENABLED(CONFIG_PSTORE_ZSTD_COMPRESS) + { + .zbufsize = zbufsize_zstd, + .name = "zstd", + }, +#endif { } }; |