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AJvYcCVfSLewepPazNAuPiUve2nhUvV/lBkBnB9yQtxpxEXg/Va9Tb5F9QVKanG0tigYmUZWLoQbKtzcjtXAlojtFrZYeS8JwbrGReN86vw= X-Gm-Message-State: AOJu0Yyr3QEmr3kNJQNaNQNvqge6/BOkoT16V/BA15rcIo5yskmP88uh JepF+f7wSpm6HoyEgFUpi9ka0BGUUXQLzq51F9IAJHzllOiNfl/Mt5+ZPyCRm7+rnCdi1Jajvzc = X-Google-Smtp-Source: AGHT+IE0MlFlPwSWQJRjErFW2GMMS4LLdcDfJb8bL7Or5RyoCHAaclgPc25OI2HOCjFzRoaD8dOoHg== X-Received: by 2002:a17:90a:1108:b0:2ab:8324:1b47 with SMTP id 98e67ed59e1d1-2b6119c8e82mr3128891a91.15.1715154165288; Wed, 08 May 2024 00:42:45 -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.17.2024.05.08.00.42.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 May 2024 00:42:44 -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 04/19] zram: add lz4hc compression backend support Date: Wed, 8 May 2024 16:41:57 +0900 Message-ID: <20240508074223.652784-5-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 | 5 ++- drivers/block/zram/backend_lz4hc.c | 72 ++++++++++++++++++++++++++++++ drivers/block/zram/backend_lz4hc.h | 10 +++++ drivers/block/zram/zcomp.c | 4 ++ 5 files changed, 100 insertions(+), 2 deletions(-) create mode 100644 drivers/block/zram/backend_lz4hc.c create mode 100644 drivers/block/zram/backend_lz4hc.h diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index f1e76fc8431a..0d890a8d2dc4 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -26,6 +26,12 @@ config ZRAM_BACKEND_LZ4 select LZ4_COMPRESS select LZ4_DECOMPRESS +config ZRAM_BACKEND_LZ4HC + bool "lz4hc compression support" + depends on ZRAM + select LZ4HC_COMPRESS + select LZ4_DECOMPRESS + choice prompt "Default zram compressor" default ZRAM_DEF_COMP_LZORLE @@ -43,6 +49,10 @@ config ZRAM_DEF_COMP_LZ4 bool "lz4" depends on ZRAM_BACKEND_LZ4 +config ZRAM_DEF_COMP_LZ4HC + bool "lz4hc" + depends on ZRAM_BACKEND_LZ4HC + endchoice config ZRAM_DEF_COMP @@ -50,6 +60,7 @@ config ZRAM_DEF_COMP default "lzo-rle" if ZRAM_DEF_COMP_LZORLE default "lzo" if ZRAM_DEF_COMP_LZO default "lz4" if ZRAM_DEF_COMP_LZ4 + default "lz4hc" if ZRAM_DEF_COMP_LZ4HC default "unset-value" config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 1be5d2657960..815b45471c7d 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -1,7 +1,8 @@ # SPDX-License-Identifier: GPL-2.0-only -obj-$(CONFIG_ZRAM_BACKEND_LZO) += backend_lzorle.o backend_lzo.o -obj-$(CONFIG_ZRAM_BACKEND_LZ4) += backend_lz4.o +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 zram-y := zcomp.o zram_drv.o diff --git a/drivers/block/zram/backend_lz4hc.c b/drivers/block/zram/backend_lz4hc.c new file mode 100644 index 000000000000..1735a2598443 --- /dev/null +++ b/drivers/block/zram/backend_lz4hc.c @@ -0,0 +1,72 @@ +#include +#include +#include +#include + +#include "backend_lz4hc.h" + +struct lz4hc_ctx { + void *mem; + s32 level; +}; + +static void lz4hc_destroy(void *ctx) +{ + struct lz4hc_ctx *zctx = ctx; + + vfree(zctx->mem); + kfree(zctx); +} + +static void *lz4hc_create(void) +{ + struct lz4hc_ctx *ctx; + + ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return NULL; + + ctx->mem = vmalloc(LZ4HC_MEM_COMPRESS); + if (!ctx->mem) { + lz4hc_destroy(ctx); + return NULL; + } + + /* @FIXME: using a hardcoded LZ4HC_DEFAULT_CLEVEL for now */ + ctx->level = LZ4HC_DEFAULT_CLEVEL; + return ctx; +} + +static int lz4hc_compress(void *ctx, const unsigned char *src, + unsigned char *dst, size_t *dst_len) +{ + struct lz4hc_ctx *zctx = ctx; + int ret; + + ret = LZ4_compress_HC(src, dst, PAGE_SIZE, *dst_len, + zctx->level, zctx->mem); + if (!ret) + return -EINVAL; + *dst_len = ret; + return 0; +} + +static int lz4hc_decompress(void *ctx, const unsigned char *src, + size_t src_len, unsigned char *dst) +{ + int dst_len = PAGE_SIZE; + int ret; + + ret = LZ4_decompress_safe(src, dst, src_len, dst_len); + if (ret < 0) + return -EINVAL; + return 0; +} + +struct zcomp_backend backend_lz4hc = { + .compress = lz4hc_compress, + .decompress = lz4hc_decompress, + .create_ctx = lz4hc_create, + .destroy_ctx = lz4hc_destroy, + .name = "lz4hc", +}; diff --git a/drivers/block/zram/backend_lz4hc.h b/drivers/block/zram/backend_lz4hc.h new file mode 100644 index 000000000000..29c428a850e2 --- /dev/null +++ b/drivers/block/zram/backend_lz4hc.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef __BACKEND_LZ4HC_H__ +#define __BACKEND_LZ4HC_H__ + +#include "zcomp.h" + +extern struct zcomp_backend backend_lz4hc; + +#endif /* __BACKEND_LZ4HC_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index 902bdaf7e299..f04f5844a23c 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -18,6 +18,7 @@ #include "backend_lzo.h" #include "backend_lzorle.h" #include "backend_lz4.h" +#include "backend_lz4hc.h" static struct zcomp_backend *backends[] = { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) @@ -26,6 +27,9 @@ static struct zcomp_backend *backends[] = { #endif #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4) &backend_lz4, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4HC) + &backend_lz4hc, #endif NULL };