btrfs: zstd use the passed through level instead of default
[sfrench/cifs-2.6.git] / fs / btrfs / zstd.c
index 43f3be755b8cdab4529b3a286502569d0a16c4ff..a951d4fe77f7de51607c42c91d2dd5820bb26932 100644 (file)
 #define ZSTD_BTRFS_MAX_INPUT (1 << ZSTD_BTRFS_MAX_WINDOWLOG)
 #define ZSTD_BTRFS_DEFAULT_LEVEL 3
 
-static ZSTD_parameters zstd_get_btrfs_parameters(size_t src_len)
+static ZSTD_parameters zstd_get_btrfs_parameters(unsigned int level,
+                                                size_t src_len)
 {
-       ZSTD_parameters params = ZSTD_getParams(ZSTD_BTRFS_DEFAULT_LEVEL,
-                                               src_len, 0);
+       ZSTD_parameters params = ZSTD_getParams(level, src_len, 0);
 
        if (params.cParams.windowLog > ZSTD_BTRFS_MAX_WINDOWLOG)
                params.cParams.windowLog = ZSTD_BTRFS_MAX_WINDOWLOG;
@@ -36,6 +36,7 @@ struct workspace {
        void *mem;
        size_t size;
        char *buf;
+       unsigned int req_level;
        struct list_head list;
        ZSTD_inBuffer in_buf;
        ZSTD_outBuffer out_buf;
@@ -55,7 +56,12 @@ static void zstd_cleanup_workspace_manager(void)
 
 static struct list_head *zstd_get_workspace(unsigned int level)
 {
-       return btrfs_get_workspace(&wsm, level);
+       struct list_head *ws = btrfs_get_workspace(&wsm, level);
+       struct workspace *workspace = list_entry(ws, struct workspace, list);
+
+       workspace->req_level = level;
+
+       return ws;
 }
 
 static void zstd_put_workspace(struct list_head *ws)
@@ -75,7 +81,7 @@ static void zstd_free_workspace(struct list_head *ws)
 static struct list_head *zstd_alloc_workspace(unsigned int level)
 {
        ZSTD_parameters params =
-                       zstd_get_btrfs_parameters(ZSTD_BTRFS_MAX_INPUT);
+                       zstd_get_btrfs_parameters(level, ZSTD_BTRFS_MAX_INPUT);
        struct workspace *workspace;
 
        workspace = kzalloc(sizeof(*workspace), GFP_KERNEL);
@@ -117,7 +123,8 @@ static int zstd_compress_pages(struct list_head *ws,
        unsigned long len = *total_out;
        const unsigned long nr_dest_pages = *out_pages;
        unsigned long max_out = nr_dest_pages * PAGE_SIZE;
-       ZSTD_parameters params = zstd_get_btrfs_parameters(len);
+       ZSTD_parameters params = zstd_get_btrfs_parameters(workspace->req_level,
+                                                          len);
 
        *out_pages = 0;
        *total_out = 0;