Some backends can create a backend-specific private data
for comp config, e.g. parse a dictionary and use it to
init all of the ctx-s later on. Introduce two zcomp_config
callbacks to create and destroy per-config backend private
data. This is also the place where config can be validated.
Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
drivers/block/zram/backend_842.c | 11 +++++++++++
drivers/block/zram/backend_deflate.c | 20 +++++++++++++++-----
drivers/block/zram/backend_lz4.c | 11 +++++++++++
drivers/block/zram/backend_lz4hc.c | 20 +++++++++++++++-----
drivers/block/zram/backend_lzo.c | 11 +++++++++++
drivers/block/zram/backend_lzorle.c | 11 +++++++++++
drivers/block/zram/backend_zstd.c | 20 +++++++++++++++-----
drivers/block/zram/zcomp.c | 6 ++++++
drivers/block/zram/zcomp.h | 4 ++++
drivers/block/zram/zram_drv.c | 3 +++
10 files changed, 102 insertions(+), 15 deletions(-)
diff --git a/drivers/block/zram/backend_842.c b/drivers/block/zram/backend_842.c
index 12e716deb763..1522aa88ac35 100644
--- a/drivers/block/zram/backend_842.c
+++ b/drivers/block/zram/backend_842.c
@@ -11,6 +11,15 @@ struct sw842_ctx {
void *mem;
};
+static int init_config_842(struct zcomp_config *config)
+{
+ return 0;
+}
+
+static void release_config_842(struct zcomp_config *config)
+{
+}
+
static void destroy_842(void *ctx)
{
struct sw842_ctx *zctx = ctx;
@@ -64,5 +73,7 @@ struct zcomp_backend backend_842 = {
.decompress = decompress_842,
.create_ctx = create_842,
.destroy_ctx = destroy_842,
+ .init_config = init_config_842,
+ .release_config = release_config_842,
.name = "842",
};
diff --git a/drivers/block/zram/backend_deflate.c b/drivers/block/zram/backend_deflate.c
index 83c660adc722..2e166b507f5a 100644
--- a/drivers/block/zram/backend_deflate.c
+++ b/drivers/block/zram/backend_deflate.c
@@ -17,6 +17,18 @@ struct deflate_ctx {
s32 level;
};
+static int deflate_init_config(struct zcomp_config *config)
+{
+ if (config->level == ZCOMP_CONFIG_NO_LEVEL)
+ config->level = Z_DEFAULT_COMPRESSION;
+
+ return 0;
+}
+
+static void deflate_release_config(struct zcomp_config *config)
+{
+}
+
static void deflate_destroy(void *ctx)
{
struct deflate_ctx *zctx = ctx;
@@ -42,11 +54,7 @@ static void *deflate_create(struct zcomp_config *config)
if (!ctx)
return NULL;
- if (config->level != ZCOMP_CONFIG_NO_LEVEL)
- ctx->level = config->level;
- else
- ctx->level = Z_DEFAULT_COMPRESSION;
-
+ ctx->level = config->level;
sz = zlib_deflate_workspacesize(-DEFLATE_DEF_WINBITS, MAX_MEM_LEVEL);
ctx->cctx.workspace = vzalloc(sz);
if (!ctx->cctx.workspace)
@@ -129,5 +137,7 @@ struct zcomp_backend backend_deflate = {
.decompress = deflate_decompress,
.create_ctx = deflate_create,
.destroy_ctx = deflate_destroy,
+ .init_config = deflate_init_config,
+ .release_config = deflate_release_config,
.name = "deflate",
};
diff --git a/drivers/block/zram/backend_lz4.c b/drivers/block/zram/backend_lz4.c
index 98d9c9274149..560fcf139301 100644
--- a/drivers/block/zram/backend_lz4.c
+++ b/drivers/block/zram/backend_lz4.c
@@ -4,6 +4,15 @@
#include "backend_lz4.h"
+static int lz4_init_config(struct zcomp_config *config)
+{
+ return 0;
+}
+
+static void lz4_release_config(struct zcomp_config *config)
+{
+}
+
static void *lz4_create(struct zcomp_config *config)
{
return vmalloc(LZ4_MEM_COMPRESS);
@@ -43,5 +52,7 @@ struct zcomp_backend backend_lz4 = {
.decompress = lz4_decompress,
.create_ctx = lz4_create,
.destroy_ctx = lz4_destroy,
+ .init_config = lz4_init_config,
+ .release_config = lz4_release_config,
.name = "lz4",
};
diff --git a/drivers/block/zram/backend_lz4hc.c b/drivers/block/zram/backend_lz4hc.c
index e1069f185437..431a44f0fcfd 100644
--- a/drivers/block/zram/backend_lz4hc.c
+++ b/drivers/block/zram/backend_lz4hc.c
@@ -10,6 +10,18 @@ struct lz4hc_ctx {
s32 level;
};
+static int lz4hc_init_config(struct zcomp_config *config)
+{
+ if (config->level == ZCOMP_CONFIG_NO_LEVEL)
+ config->level = LZ4HC_DEFAULT_CLEVEL;
+
+ return 0;
+}
+
+static void lz4hc_release_config(struct zcomp_config *config)
+{
+}
+
static void lz4hc_destroy(void *ctx)
{
struct lz4hc_ctx *zctx = ctx;
@@ -26,11 +38,7 @@ static void *lz4hc_create(struct zcomp_config *config)
if (!ctx)
return NULL;
- if (config->level != ZCOMP_CONFIG_NO_LEVEL)
- ctx->level = config->level;
- else
- ctx->level = LZ4HC_DEFAULT_CLEVEL;
-
+ ctx->level = config->level;
ctx->mem = vmalloc(LZ4HC_MEM_COMPRESS);
if (!ctx->mem) {
lz4hc_destroy(ctx);
@@ -70,5 +78,7 @@ struct zcomp_backend backend_lz4hc = {
.decompress = lz4hc_decompress,
.create_ctx = lz4hc_create,
.destroy_ctx = lz4hc_destroy,
+ .init_config = lz4hc_init_config,
+ .release_config = lz4hc_release_config,
.name = "lz4hc",
};
diff --git a/drivers/block/zram/backend_lzo.c b/drivers/block/zram/backend_lzo.c
index 79ecfae9c4c5..75e0e3d297aa 100644
--- a/drivers/block/zram/backend_lzo.c
+++ b/drivers/block/zram/backend_lzo.c
@@ -6,6 +6,15 @@
#include "backend_lzo.h"
+static int lzo_init_config(struct zcomp_config *config)
+{
+ return 0;
+}
+
+static void lzo_release_config(struct zcomp_config *config)
+{
+}
+
static void *lzo_create(struct zcomp_config *config)
{
return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
@@ -40,5 +49,7 @@ struct zcomp_backend backend_lzo = {
.decompress = lzo_decompress,
.create_ctx = lzo_create,
.destroy_ctx = lzo_destroy,
+ .init_config = lzo_init_config,
+ .release_config = lzo_release_config,
.name = "lzo",
};
diff --git a/drivers/block/zram/backend_lzorle.c b/drivers/block/zram/backend_lzorle.c
index b0937103b5fb..d1dc2e35061b 100644
--- a/drivers/block/zram/backend_lzorle.c
+++ b/drivers/block/zram/backend_lzorle.c
@@ -6,6 +6,15 @@
#include "backend_lzorle.h"
+static int lzorle_init_config(struct zcomp_config *config)
+{
+ return 0;
+}
+
+static void lzorle_release_config(struct zcomp_config *config)
+{
+}
+
static void *lzorle_create(struct zcomp_config *config)
{
return kzalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
@@ -40,5 +49,7 @@ struct zcomp_backend backend_lzorle = {
.decompress = lzorle_decompress,
.create_ctx = lzorle_create,
.destroy_ctx = lzorle_destroy,
+ .init_config = lzorle_init_config,
+ .release_config = lzorle_release_config,
.name = "lzo-rle",
};
diff --git a/drivers/block/zram/backend_zstd.c b/drivers/block/zram/backend_zstd.c
index 006d0f40617d..df59584b0337 100644
--- a/drivers/block/zram/backend_zstd.c
+++ b/drivers/block/zram/backend_zstd.c
@@ -36,6 +36,18 @@ static void zstd_ctx_free(void *opaque, void *address)
kvfree(address);
}
+static int zstd_init_config(struct zcomp_config *config)
+{
+ if (config->level == ZCOMP_CONFIG_NO_LEVEL)
+ config->level = ZSTD_defaultCLevel();
+
+ return 0;
+}
+
+static void zstd_release_config(struct zcomp_config *config)
+{
+}
+
static void zstd_destroy(void *ctx)
{
struct zstd_ctx *zctx = ctx;
@@ -63,11 +75,7 @@ static void *zstd_create(struct zcomp_config *config)
if (!ctx)
return NULL;
- if (config->level != ZCOMP_CONFIG_NO_LEVEL)
- ctx->level = config->level;
- else
- ctx->level = ZSTD_defaultCLevel();
-
+ ctx->level = config->level;
ctx->ctx_mem.customAlloc = zstd_ctx_alloc;
ctx->ctx_mem.customFree = zstd_ctx_free;
@@ -173,5 +181,7 @@ struct zcomp_backend backend_zstd = {
.decompress = zstd_decompress,
.create_ctx = zstd_create,
.destroy_ctx = zstd_destroy,
+ .init_config = zstd_init_config,
+ .release_config = zstd_release_config,
.name = "zstd",
};
diff --git a/drivers/block/zram/zcomp.c b/drivers/block/zram/zcomp.c
index 3f990a715487..a7013a4b6575 100644
--- a/drivers/block/zram/zcomp.c
+++ b/drivers/block/zram/zcomp.c
@@ -187,18 +187,24 @@ static int zcomp_init(struct zcomp *comp)
if (!comp->stream)
return -ENOMEM;
+ ret = comp->backend->init_config(comp->config);
+ if (ret)
+ goto cleanup;
+
ret = cpuhp_state_add_instance(CPUHP_ZCOMP_PREPARE, &comp->node);
if (ret < 0)
goto cleanup;
return 0;
cleanup:
+ comp->backend->release_config(comp->config);
free_percpu(comp->stream);
return ret;
}
void zcomp_destroy(struct zcomp *comp)
{
+ comp->backend->release_config(comp->config);
cpuhp_state_remove_instance(CPUHP_ZCOMP_PREPARE, &comp->node);
free_percpu(comp->stream);
kfree(comp);
diff --git a/drivers/block/zram/zcomp.h b/drivers/block/zram/zcomp.h
index 345c78bc76db..aa604e5db7ad 100644
--- a/drivers/block/zram/zcomp.h
+++ b/drivers/block/zram/zcomp.h
@@ -22,6 +22,7 @@ struct zcomp_config {
s32 level;
size_t dict_sz;
void *dict;
+ void *private;
};
struct zcomp_backend {
@@ -34,6 +35,9 @@ struct zcomp_backend {
void *(*create_ctx)(struct zcomp_config *config);
void (*destroy_ctx)(void *ctx);
+ int (*init_config)(struct zcomp_config *config);
+ void (*release_config)(struct zcomp_config *config);
+
const char *name;
};
diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index 863e4e125eaa..d667fe2d0cd9 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1018,6 +1018,9 @@ static void __reset_comp_config(struct zram *zram, u32 prio)
{
struct zcomp_config *config = &zram->configs[prio];
+ /* config->private should be freed by the backend */
+ WARN_ON_ONCE(config->private);
+
vfree(config->dict);
config->level = ZCOMP_CONFIG_NO_LEVEL;
config->dict_sz = 0;
--
2.45.0.rc1.225.g2a3ae87e7f-goog
