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-rw-r--r--fs/jffs2/compr_lzo.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/jffs2/compr_lzo.c b/fs/jffs2/compr_lzo.c
new file mode 100644
index 0000000000..1be30dc604
--- /dev/null
+++ b/fs/jffs2/compr_lzo.c
@@ -0,0 +1,52 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright © 2007 Nokia Corporation. All rights reserved.
+ * Copyright © 2004-2010 David Woodhouse <dwmw2@infradead.org>
+ *
+ * Created by Richard Purdie <rpurdie@openedhand.com>
+ *
+ * For licensing information, see the file 'LICENCE' in this directory.
+ *
+ */
+
+#include <common.h>
+#include <lzo.h>
+#include <linux/kernel.h>
+#include "compr.h"
+
+static int jffs2_lzo_decompress(unsigned char *data_in, unsigned char *cpage_out,
+ uint32_t srclen, uint32_t destlen)
+{
+ size_t dl = destlen;
+ int ret;
+
+ ret = lzo1x_decompress_safe(data_in, srclen, cpage_out, &dl);
+
+ if (ret != LZO_E_OK || dl != destlen)
+ return -1;
+
+ return 0;
+}
+
+static struct jffs2_compressor jffs2_lzo_comp = {
+ .priority = JFFS2_LZO_PRIORITY,
+ .name = "lzo",
+ .compr = JFFS2_COMPR_LZO,
+ .decompress = &jffs2_lzo_decompress,
+ .disabled = 0,
+};
+
+int __init jffs2_lzo_init(void)
+{
+ int ret;
+
+ ret = jffs2_register_compressor(&jffs2_lzo_comp);
+
+ return ret;
+}
+
+void jffs2_lzo_exit(void)
+{
+ jffs2_unregister_compressor(&jffs2_lzo_comp);
+}