The patch titled
Subject: zram: introduce zcomp_req structure
has been added to the -mm mm-unstable branch. Its filename is
zram-introduce-zcomp_req-structure.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/zram-introduce-zcomp_req-structure.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Subject: zram: introduce zcomp_req structure
Date: Mon, 2 Sep 2024 19:56:05 +0900
Encapsulate compression/decompression data in zcomp_req structure.
Link: https://lkml.kernel.org/r/20240902105656.1383858-18-senozhatsky@xxxxxxxxxxxx
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Nick Terrell <terrelln@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/block/zram/backend_842.c | 17 +++++++---------
drivers/block/zram/backend_deflate.c | 26 ++++++++++---------------
drivers/block/zram/backend_lz4.c | 15 ++++++--------
drivers/block/zram/backend_lz4hc.c | 13 +++++-------
drivers/block/zram/backend_lzo.c | 12 +++++------
drivers/block/zram/backend_lzorle.c | 13 +++++-------
drivers/block/zram/backend_zstd.c | 15 ++++++--------
drivers/block/zram/zcomp.c | 23 +++++++++++++++-------
drivers/block/zram/zcomp.h | 15 +++++++++-----
9 files changed, 77 insertions(+), 72 deletions(-)
--- a/drivers/block/zram/backend_842.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_842.c
@@ -38,25 +38,24 @@ error:
return NULL;
}
-static int compress_842(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len)
+static int compress_842(void *ctx, struct zcomp_req *req)
{
struct sw842_ctx *zctx = ctx;
- unsigned int dlen = *dst_len;
+ unsigned int dlen = req->dst_len;
int ret;
- ret = sw842_compress(src, src_len, dst, &dlen, zctx->mem);
+ ret = sw842_compress(req->src, req->src_len, req->dst, &dlen,
+ zctx->mem);
if (ret == 0)
- *dst_len = dlen;
+ req->dst_len = dlen;
return ret;
}
-static int decompress_842(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t dst_len)
+static int decompress_842(void *ctx, struct zcomp_req *req)
{
- unsigned int dlen = dst_len;
+ unsigned int dlen = req->dst_len;
- return sw842_decompress(src, src_len, dst, &dlen);
+ return sw842_decompress(req->src, req->src_len, req->dst, &dlen);
}
const struct zcomp_ops backend_842 = {
--- a/drivers/block/zram/backend_deflate.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_deflate.c
@@ -74,9 +74,7 @@ error:
return NULL;
}
-static int deflate_compress(void *ctx, const unsigned char *src,
- size_t src_len, unsigned char *dst,
- size_t *dst_len)
+static int deflate_compress(void *ctx, struct zcomp_req *req)
{
struct deflate_ctx *zctx = ctx;
struct z_stream_s *deflate;
@@ -87,22 +85,20 @@ static int deflate_compress(void *ctx, c
if (ret != Z_OK)
return -EINVAL;
- deflate->next_in = (u8 *)src;
- deflate->avail_in = src_len;
- deflate->next_out = (u8 *)dst;
- deflate->avail_out = *dst_len;
+ deflate->next_in = (u8 *)req->src;
+ deflate->avail_in = req->src_len;
+ deflate->next_out = (u8 *)req->dst;
+ deflate->avail_out = req->dst_len;
ret = zlib_deflate(deflate, Z_FINISH);
if (ret != Z_STREAM_END)
return -EINVAL;
- *dst_len = deflate->total_out;
+ req->dst_len = deflate->total_out;
return 0;
}
-static int deflate_decompress(void *ctx, const unsigned char *src,
- size_t src_len, unsigned char *dst,
- size_t dst_len)
+static int deflate_decompress(void *ctx, struct zcomp_req *req)
{
struct deflate_ctx *zctx = ctx;
struct z_stream_s *inflate;
@@ -114,10 +110,10 @@ static int deflate_decompress(void *ctx,
if (ret != Z_OK)
return -EINVAL;
- inflate->next_in = (u8 *)src;
- inflate->avail_in = src_len;
- inflate->next_out = (u8 *)dst;
- inflate->avail_out = dst_len;
+ inflate->next_in = (u8 *)req->src;
+ inflate->avail_in = req->src_len;
+ inflate->next_out = (u8 *)req->dst;
+ inflate->avail_out = req->dst_len;
ret = zlib_inflate(inflate, Z_SYNC_FLUSH);
if (ret != Z_STREAM_END)
--- a/drivers/block/zram/backend_lz4.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_lz4.c
@@ -41,26 +41,25 @@ error:
return NULL;
}
-static int lz4_compress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len)
+static int lz4_compress(void *ctx, struct zcomp_req *req)
{
struct lz4_ctx *zctx = ctx;
int ret;
- ret = LZ4_compress_fast(src, dst, src_len, *dst_len,
- zctx->level, zctx->mem);
+ ret = LZ4_compress_fast(req->src, req->dst, req->src_len,
+ req->dst_len, zctx->level, zctx->mem);
if (!ret)
return -EINVAL;
- *dst_len = ret;
+ req->dst_len = ret;
return 0;
}
-static int lz4_decompress(void *ctx, const unsigned char *src,
- size_t src_len, unsigned char *dst, size_t dst_len)
+static int lz4_decompress(void *ctx, struct zcomp_req *req)
{
int ret;
- ret = LZ4_decompress_safe(src, dst, src_len, dst_len);
+ ret = LZ4_decompress_safe(req->src, req->dst, req->src_len,
+ req->dst_len);
if (ret < 0)
return -EINVAL;
return 0;
--- a/drivers/block/zram/backend_lz4hc.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_lz4hc.c
@@ -41,26 +41,25 @@ error:
return NULL;
}
-static int lz4hc_compress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len)
+static int lz4hc_compress(void *ctx, struct zcomp_req *req)
{
struct lz4hc_ctx *zctx = ctx;
int ret;
- ret = LZ4_compress_HC(src, dst, src_len, *dst_len,
+ ret = LZ4_compress_HC(req->src, req->dst, req->src_len, req->dst_len,
zctx->level, zctx->mem);
if (!ret)
return -EINVAL;
- *dst_len = ret;
+ req->dst_len = ret;
return 0;
}
-static int lz4hc_decompress(void *ctx, const unsigned char *src,
- size_t src_len, unsigned char *dst, size_t dst_len)
+static int lz4hc_decompress(void *ctx, struct zcomp_req *req)
{
int ret;
- ret = LZ4_decompress_safe(src, dst, src_len, dst_len);
+ ret = LZ4_decompress_safe(req->src, req->dst, req->src_len,
+ req->dst_len);
if (ret < 0)
return -EINVAL;
return 0;
--- a/drivers/block/zram/backend_lzo.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_lzo.c
@@ -16,21 +16,21 @@ static void lzo_destroy(void *ctx)
kfree(ctx);
}
-static int lzo_compress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len)
+static int lzo_compress(void *ctx, struct zcomp_req *req)
{
int ret;
- ret = lzo1x_1_compress(src, src_len, dst, dst_len, ctx);
+ ret = lzo1x_1_compress(req->src, req->src_len, req->dst,
+ &req->dst_len, ctx);
return ret == LZO_E_OK ? 0 : ret;
}
-static int lzo_decompress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t dst_len)
+static int lzo_decompress(void *ctx, struct zcomp_req *req)
{
int ret;
- ret = lzo1x_decompress_safe(src, src_len, dst, &dst_len);
+ ret = lzo1x_decompress_safe(req->src, req->src_len,
+ req->dst, &req->dst_len);
return ret == LZO_E_OK ? 0 : ret;
}
--- a/drivers/block/zram/backend_lzorle.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_lzorle.c
@@ -16,22 +16,21 @@ static void lzorle_destroy(void *ctx)
kfree(ctx);
}
-static int lzorle_compress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len)
+static int lzorle_compress(void *ctx, struct zcomp_req *req)
{
int ret;
- ret = lzorle1x_1_compress(src, src_len, dst, dst_len, ctx);
+ ret = lzorle1x_1_compress(req->src, req->src_len, req->dst,
+ &req->dst_len, ctx);
return ret == LZO_E_OK ? 0 : ret;
}
-static int lzorle_decompress(void *ctx, const unsigned char *src,
- size_t src_len, unsigned char *dst,
- size_t dst_len)
+static int lzorle_decompress(void *ctx, struct zcomp_req *req)
{
int ret;
- ret = lzo1x_decompress_safe(src, src_len, dst, &dst_len);
+ ret = lzo1x_decompress_safe(req->src, req->src_len,
+ req->dst, &req->dst_len);
return ret == LZO_E_OK ? 0 : ret;
}
--- a/drivers/block/zram/backend_zstd.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/backend_zstd.c
@@ -67,27 +67,26 @@ error:
return NULL;
}
-static int zstd_compress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len)
+static int zstd_compress(void *ctx, struct zcomp_req *req)
{
struct zstd_ctx *zctx = ctx;
size_t ret;
- ret = zstd_compress_cctx(zctx->cctx, dst, *dst_len,
- src, src_len, &zctx->cprm);
+ ret = zstd_compress_cctx(zctx->cctx, req->dst, req->dst_len,
+ req->src, req->src_len, &zctx->cprm);
if (zstd_is_error(ret))
return -EINVAL;
- *dst_len = ret;
+ req->dst_len = ret;
return 0;
}
-static int zstd_decompress(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t dst_len)
+static int zstd_decompress(void *ctx, struct zcomp_req *req)
{
struct zstd_ctx *zctx = ctx;
size_t ret;
- ret = zstd_decompress_dctx(zctx->dctx, dst, dst_len, src, src_len);
+ ret = zstd_decompress_dctx(zctx->dctx, req->dst, req->dst_len,
+ req->src, req->src_len);
if (zstd_is_error(ret))
return -EINVAL;
return 0;
--- a/drivers/block/zram/zcomp.c~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/zcomp.c
@@ -119,22 +119,31 @@ void zcomp_stream_put(struct zcomp *comp
int zcomp_compress(struct zcomp *comp, struct zcomp_strm *zstrm,
const void *src, unsigned int *dst_len)
{
- /* The dst buffer should always be 2 * PAGE_SIZE */
- size_t dlen = 2 * PAGE_SIZE;
+ struct zcomp_req req = {
+ .src = src,
+ .dst = zstrm->buffer,
+ .src_len = PAGE_SIZE,
+ .dst_len = 2 * PAGE_SIZE,
+ };
int ret;
- ret = comp->ops->compress(zstrm->ctx, src, PAGE_SIZE,
- zstrm->buffer, &dlen);
+ ret = comp->ops->compress(zstrm->ctx, &req);
if (!ret)
- *dst_len = dlen;
+ *dst_len = req.dst_len;
return ret;
}
int zcomp_decompress(struct zcomp *comp, struct zcomp_strm *zstrm,
const void *src, unsigned int src_len, void *dst)
{
- return comp->ops->decompress(zstrm->ctx, src, src_len,
- dst, PAGE_SIZE);
+ struct zcomp_req req = {
+ .src = src,
+ .dst = dst,
+ .src_len = src_len,
+ .dst_len = PAGE_SIZE,
+ };
+
+ return comp->ops->decompress(zstrm->ctx, &req);
}
int zcomp_cpu_up_prepare(unsigned int cpu, struct hlist_node *node)
--- a/drivers/block/zram/zcomp.h~zram-introduce-zcomp_req-structure
+++ a/drivers/block/zram/zcomp.h
@@ -21,12 +21,17 @@ struct zcomp_strm {
void *ctx;
};
-struct zcomp_ops {
- int (*compress)(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t *dst_len);
+struct zcomp_req {
+ const unsigned char *src;
+ const size_t src_len;
+
+ unsigned char *dst;
+ size_t dst_len;
+};
- int (*decompress)(void *ctx, const unsigned char *src, size_t src_len,
- unsigned char *dst, size_t dst_len);
+struct zcomp_ops {
+ int (*compress)(void *ctx, struct zcomp_req *req);
+ int (*decompress)(void *ctx, struct zcomp_req *req);
void *(*create_ctx)(struct zcomp_params *params);
void (*destroy_ctx)(void *ctx);
_
Patches currently in -mm which might be from senozhatsky@xxxxxxxxxxxx are
lib-zstd-export-api-needed-for-dictionary-support.patch
lib-lz4hc-export-lz4_resetstreamhc-symbol.patch
lib-zstd-fix-null-deref-in-zstd_createcdict_advanced2.patch
zram-introduce-custom-comp-backends-api.patch
zram-add-lzo-and-lzorle-compression-backends-support.patch
zram-add-lz4-compression-backend-support.patch
zram-add-lz4hc-compression-backend-support.patch
zram-add-zstd-compression-backend-support.patch
zram-pass-estimated-src-size-hint-to-zstd.patch
zram-add-zlib-compression-backend-support.patch
zram-add-842-compression-backend-support.patch
zram-check-that-backends-array-has-at-least-one-backend.patch
zram-introduce-zcomp_params-structure.patch
zram-recalculate-zstd-compression-params-once.patch
zram-introduce-algorithm_params-device-attribute.patch
zram-add-support-for-dict-comp-config.patch
zram-introduce-zcomp_req-structure.patch
zram-introduce-zcomp_ctx-structure.patch
zram-move-immutable-comp-params-away-from-per-cpu-context.patch
zram-add-dictionary-support-to-lz4.patch
zram-add-dictionary-support-to-lz4hc.patch
zram-add-dictionary-support-to-zstd-backend.patch
documentation-zram-add-documentation-for-algorithm-parameters.patch
zram-support-priority-parameter-in-recompression.patch
