@@ -33,6 +33,7 @@
#include <linux/debugfs.h>
#include <linux/cpuhotplug.h>
#include <linux/part_stat.h>
+#include <linux/kernel_read_file.h>
#include "zram_drv.h"
@@ -1013,9 +1014,23 @@ static int __comp_algorithm_store(struct zram *zram, u32 prio, const char *buf)
return 0;
}
-static int comp_config_store(struct zram *zram, u32 prio, s32 level)
+static int comp_config_store(struct zram *zram, u32 prio, s32 level,
+ const char *dict_path)
{
+ size_t sz = 0;
+
+ if (dict_path) {
+ sz = kernel_read_file_from_path(dict_path, 0,
+ &zram->configs[prio].dict,
+ INT_MAX,
+ NULL,
+ READING_POLICY);
+ if (sz < 0)
+ return -EINVAL;
+ }
+
zram->configs[prio].level = level;
+ zram->configs[prio].dict_sz = sz;
return 0;
}
@@ -1035,7 +1050,7 @@ static ssize_t comp_algorithm_store(struct device *dev,
{
struct zram *zram = dev_to_zram(dev);
char *args, *param, *val;
- char *alg = NULL;
+ char *alg = NULL, *dict_path = NULL;
s32 level = ZCOMP_CONFIG_NO_LEVEL;
int ret;
@@ -1063,12 +1078,17 @@ static ssize_t comp_algorithm_store(struct device *dev,
return ret;
continue;
}
+
+ if (!strcmp(param, "dict")) {
+ dict_path = val;
+ continue;
+ }
}
if (!alg)
return -EINVAL;
- ret = comp_config_store(zram, ZRAM_PRIMARY_COMP, level);
+ ret = comp_config_store(zram, ZRAM_PRIMARY_COMP, level, dict_path);
if (!ret)
ret = __comp_algorithm_store(zram, ZRAM_PRIMARY_COMP, alg);
return ret ? ret : len;
@@ -1102,7 +1122,7 @@ static ssize_t recomp_algorithm_store(struct device *dev,
struct zram *zram = dev_to_zram(dev);
int prio = ZRAM_SECONDARY_COMP;
char *args, *param, *val;
- char *alg = NULL;
+ char *alg = NULL, *dict_path = NULL;
s32 level = ZCOMP_CONFIG_NO_LEVEL;
int ret;
@@ -1131,6 +1151,11 @@ static ssize_t recomp_algorithm_store(struct device *dev,
return ret;
continue;
}
+
+ if (!strcmp(param, "dict")) {
+ dict_path = val;
+ continue;
+ }
}
if (!alg)
@@ -1139,7 +1164,7 @@ static ssize_t recomp_algorithm_store(struct device *dev,
if (prio < ZRAM_SECONDARY_COMP || prio >= ZRAM_MAX_COMPS)
return -EINVAL;
- ret = comp_config_store(zram, prio, level);
+ ret = comp_config_store(zram, prio, level, dict_path);
if (!ret)
ret = __comp_algorithm_store(zram, prio, alg);
return ret ? ret : len;
Handle dict=path param so that we can read a pre-trained compression algorithm dictionary which we then pass to the backend configuration. Signed-off-by: Sergey Senozhatsky <senozhatsky@chromium.org> --- drivers/block/zram/zram_drv.c | 35 ++++++++++++++++++++++++++++++----- 1 file changed, 30 insertions(+), 5 deletions(-)