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Wed, 08 May 2024 00:42:42 -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.17.2024.05.08.00.42.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 May 2024 00:42:41 -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 03/19] zram: add lz4 compression backend support Date: Wed, 8 May 2024 16:41:56 +0900 Message-ID: <20240508074223.652784-4-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Signed-off-by: Sergey Senozhatsky --- drivers/block/zram/Kconfig | 11 ++++++++ drivers/block/zram/Makefile | 1 + drivers/block/zram/backend_lz4.c | 47 ++++++++++++++++++++++++++++++++ drivers/block/zram/backend_lz4.h | 10 +++++++ drivers/block/zram/zcomp.c | 4 +++ 5 files changed, 73 insertions(+) create mode 100644 drivers/block/zram/backend_lz4.c create mode 100644 drivers/block/zram/backend_lz4.h diff --git a/drivers/block/zram/Kconfig b/drivers/block/zram/Kconfig index 5d329a887b12..f1e76fc8431a 100644 --- a/drivers/block/zram/Kconfig +++ b/drivers/block/zram/Kconfig @@ -20,6 +20,12 @@ config ZRAM_BACKEND_LZO select LZO_COMPRESS select LZO_DECOMPRESS =20 +config ZRAM_BACKEND_LZ4 + bool "lz4 compression support" + depends on ZRAM + select LZ4_COMPRESS + select LZ4_DECOMPRESS + choice prompt "Default zram compressor" default ZRAM_DEF_COMP_LZORLE @@ -33,12 +39,17 @@ config ZRAM_DEF_COMP_LZO bool "lzo" depends on ZRAM_BACKEND_LZO =20 +config ZRAM_DEF_COMP_LZ4 + bool "lz4" + depends on ZRAM_BACKEND_LZ4 + endchoice =20 config ZRAM_DEF_COMP string default "lzo-rle" if ZRAM_DEF_COMP_LZORLE default "lzo" if ZRAM_DEF_COMP_LZO + default "lz4" if ZRAM_DEF_COMP_LZ4 default "unset-value" =20 config ZRAM_WRITEBACK diff --git a/drivers/block/zram/Makefile b/drivers/block/zram/Makefile index 2dcbc9b75d91..1be5d2657960 100644 --- a/drivers/block/zram/Makefile +++ b/drivers/block/zram/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only =20 obj-$(CONFIG_ZRAM_BACKEND_LZO) +=3D backend_lzorle.o backend_lzo.o +obj-$(CONFIG_ZRAM_BACKEND_LZ4) +=3D backend_lz4.o =20 zram-y :=3D zcomp.o zram_drv.o =20 diff --git a/drivers/block/zram/backend_lz4.c b/drivers/block/zram/backend_= lz4.c new file mode 100644 index 000000000000..697592dbabe2 --- /dev/null +++ b/drivers/block/zram/backend_lz4.c @@ -0,0 +1,47 @@ +#include +#include +#include + +#include "backend_lz4.h" + +static void *lz4_create(void) +{ + return vmalloc(LZ4_MEM_COMPRESS); +} + +static void lz4_destroy(void *ctx) +{ + vfree(ctx); +} + +static int lz4_compress(void *ctx, const unsigned char *src, + unsigned char *dst, size_t *dst_len) +{ + int ret; + + ret =3D LZ4_compress_default(src, dst, PAGE_SIZE, *dst_len, ctx); + if (!ret) + return -EINVAL; + *dst_len =3D ret; + return 0; +} + +static int lz4_decompress(void *ctx, const unsigned char *src, + size_t src_len, unsigned char *dst) +{ + int dst_len =3D PAGE_SIZE; + int ret; + + ret =3D LZ4_decompress_safe(src, dst, src_len, dst_len); + if (ret < 0) + return -EINVAL; + return 0; +} + +struct zcomp_backend backend_lz4 =3D { + .compress =3D lz4_compress, + .decompress =3D lz4_decompress, + .create_ctx =3D lz4_create, + .destroy_ctx =3D lz4_destroy, + .name =3D "lz4", +}; diff --git a/drivers/block/zram/backend_lz4.h b/drivers/block/zram/backend_= lz4.h new file mode 100644 index 000000000000..a5fb5564835c --- /dev/null +++ b/drivers/block/zram/backend_lz4.h @@ -0,0 +1,10 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#ifndef __BACKEND_LZ4_H__ +#define __BACKEND_LZ4_H__ + +#include "zcomp.h" + +extern struct zcomp_backend backend_lz4; + +#endif /* __BACKEND_LZ4_H__ */ diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c index 58fb3ac91f4b..902bdaf7e299 100644 --- a/drivers/block/zram/zcomp.c +++ b/drivers/block/zram/zcomp.c @@ -17,11 +17,15 @@ =20 #include "backend_lzo.h" #include "backend_lzorle.h" +#include "backend_lz4.h" =20 static struct zcomp_backend *backends[] =3D { #if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZO) &backend_lzorle, &backend_lzo, +#endif +#if IS_ENABLED(CONFIG_ZRAM_BACKEND_LZ4) + &backend_lz4, #endif NULL }; --=20 2.45.0.rc1.225.g2a3ae87e7f-goog