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AJvYcCUj6KYyUJCbpzIlnbRsYpUZ667j6rpTh+1LDazTXldlWKTEbc4/8DQCXbWF7weN9GYqfbwSDbFCCLRu3A2A7hYwL36CZVoQRbuz+H8= X-Gm-Message-State: AOJu0Yz6Uw1P9iENFnuvHmQZl/lVAADuwrfl5x+O81DYZRDqpX0tqTbJ OkZ8jZhIs9bmy8a0ObssoDyYfUhncY7cSMzElVPFecTExuORT/Sy2av55K5v3A== X-Google-Smtp-Source: AGHT+IFO2VQzLGGAy8b1vLdPgLtYlvSlasHwDwvTd2+OhnH1jF5ePjrL8wvO3+GWqyNffeo4LSj2IQ== X-Received: by 2002:a05:6a21:6d96:b0:1ad:9adf:febf with SMTP id adf61e73a8af0-1afc8d5be49mr2191762637.31.1715154167678; Wed, 08 May 2024 00:42:47 -0700 (PDT) Received: from tigerii.tok.corp.google.com ([2401:fa00:8f:203:ad4d:5f6c:6699:2da4]) by smtp.gmail.com with ESMTPSA id l5-20020a17090aec0500b002b328adaa40sm780011pjy.17.2024.05.08.00.42.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 May 2024 00:42:47 -0700 (PDT) From: Sergey Senozhatsky To: Andrew Morton , Minchan Kim Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, Sergey Senozhatsky Subject: [PATCHv3 05/19] zram: add zstd compression backend support Date: Wed, 8 May 2024 16:41:58 +0900 Message-ID: <20240508074223.652784-6-senozhatsky@chromium.org> X-Mailer: git-send-email 2.45.0.rc1.225.g2a3ae87e7f-goog In-Reply-To: <20240508074223.652784-1-senozhatsky@chromium.org> References: <20240508074223.652784-1-senozhatsky@chromium.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Signed-off-by: Sergey Senozhatsky --- drivers/block/zram/Kconfig | 11 ++++ drivers/block/zram/Makefile | 1 + drivers/block/zram/backend_zstd.c | 97 +++++++++++++++++++++++++++++++ drivers/block/zram/backend_zstd.h | 10 ++++ drivers/block/zram/zcomp.c | 4 ++ 5 files changed, 123 insertions(+) create mode 100644 drivers/block/zram/backend_zstd.c create mode 100644 drivers/block/zram/backend_zstd.h diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 0d890a8d2dc4..71cd0d5d8f35 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -32,6 +32,12 @@ config ZRAM_BACKEND_LZ4HC select LZ4HC_COMPRESS select LZ4_DECOMPRESS +config ZRAM_BACKEND_ZSTD + bool "zstd compression support" + depends on ZRAM + select ZSTD_COMPRESS + select ZSTD_DECOMPRESS + choice prompt "Default zram compressor" default ZRAM_DEF_COMP_LZORLE @@ -53,6 +59,10 @@ config ZRAM_DEF_COMP_LZ4HC bool "lz4hc" depends on ZRAM_BACKEND_LZ4HC +config ZRAM_DEF_COMP_ZSTD + bool "zstd" + depends on ZRAM_BACKEND_ZSTD + endchoice config ZRAM_DEF_COMP @@ -61,6 +71,7 @@ config ZRAM_DEF_COMP default "lzo" if ZRAM_DEF_COMP_LZO default "lz4" if ZRAM_DEF_COMP_LZ4 default "lz4hc" if ZRAM_DEF_COMP_LZ4HC + default "zstd" if ZRAM_DEF_COMP_ZSTD default "unset-value" config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 815b45471c7d..053fe35e346b 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -3,6 +3,7 @@ obj-$(CONFIG_ZRAM_BACKEND_LZO) += backend_lzorle.o backend_lzo.o obj-$(CONFIG_ZRAM_BACKEND_LZ4) += backend_lz4.o obj-$(CONFIG_ZRAM_BACKEND_LZ4HC) += backend_lz4hc.o +obj-$(CONFIG_ZRAM_BACKEND_ZSTD) += backend_zstd.o zram-y := zcomp.o zram_drv.o diff --git a/drivers/block/zram/backend_zstd.c b/drivers/block/zram/backend_zstd.c new file mode 100644 index 000000000000..4da49626f110 --- /dev/null +++ b/drivers/block/zram/backend_zstd.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include +#include + +#include "backend_zstd.h" + +struct zstd_ctx { + zstd_cctx *cctx; + zstd_dctx *dctx; + void *cctx_mem; + void *dctx_mem; + s32 level; +}; + +static void zstd_destroy(void *ctx) +{ + struct zstd_ctx *zctx = ctx; + + vfree(zctx->cctx_mem); + vfree(zctx->dctx_mem); + kfree(zctx); +} + +static void *zstd_create(void) +{ + zstd_parameters params; + struct zstd_ctx *ctx; + size_t sz; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->level = ZSTD_defaultCLevel(); + params = zstd_get_params(ctx->level, 0); + sz = zstd_cctx_workspace_bound(¶ms.cParams); + ctx->cctx_mem = vzalloc(sz); + if (!ctx->cctx_mem) + goto error; + + ctx->cctx = zstd_init_cctx(ctx->cctx_mem, sz); + if (!ctx->cctx) + goto error; + + sz = zstd_dctx_workspace_bound(); + ctx->dctx_mem = vzalloc(sz); + if (!ctx->dctx_mem) + goto error; + + ctx->dctx = zstd_init_dctx(ctx->dctx_mem, sz); + if (!ctx->dctx) + goto error; + + return ctx; + +error: + zstd_destroy(ctx); + return NULL; +} + +static int zstd_compress(void *ctx, const unsigned char *src, + unsigned char *dst, size_t *dst_len) +{ + struct zstd_ctx *zctx = ctx; + const zstd_parameters params = zstd_get_params(zctx->level, 0); + size_t ret; + + ret = zstd_compress_cctx(zctx->cctx, dst, *dst_len, + src, PAGE_SIZE, ¶ms); + if (zstd_is_error(ret)) + return -EINVAL; + *dst_len = ret; + return 0; +} + +static int zstd_decompress(void *ctx, const unsigned char *src, size_t src_len, + unsigned char *dst) +{ + struct zstd_ctx *zctx = ctx; + size_t ret; + + ret = zstd_decompress_dctx(zctx->dctx, dst, PAGE_SIZE, src, src_len); + if (zstd_is_error(ret)) + return -EINVAL; + return 0; +} + +struct zcomp_backend backend_zstd = { + .compress = zstd_compress, + .decompress = zstd_decompress, + .create_ctx = zstd_create, + .destroy_ctx = zstd_destroy, + .name = "zstd", +}; diff --git a/drivers/block/zram/backend_zstd.h b/drivers/block/zram/backend_zstd.h new file mode 100644 index 000000000000..75d2d2c02768 --- /dev/null +++ b/drivers/block/zram/backend_zstd.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef __BACKEND_ZSTD_H__ +#define __BACKEND_ZSTD_H__ + +#include "zcomp.h" + +extern struct zcomp_backend backend_zstd; + +#endif /* __BACKEND_ZSTD_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index f04f5844a23c..c16eb038f608 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -19,6 +19,7 @@ #include "backend_lzorle.h" #include "backend_lz4.h" #include "backend_lz4hc.h" +#include "backend_zstd.h" static struct zcomp_backend *backends[] = { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) @@ -30,6 +31,9 @@ static struct zcomp_backend *backends[] = { #endif #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4HC) &backend_lz4hc, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_ZSTD) + &backend_zstd, #endif NULL };