diff options
Diffstat (limited to 'fs/jffs2/compr_lzo.c')
-rw-r--r-- | fs/jffs2/compr_lzo.c | 52 |
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); +} |