fs: add uimagefs

this will provide the image data and information via file

 # ls -l /tmp/
-rwxrwxrwx          3 arch
-rwxrwxrwx         12 compression
-rwxrwxrwx         16 name
-rwxrwxrwx          5 os
-rwxrwxrwx         24 time
-rwxrwxrwx         12 type
-rwxrwxrwx         10 load_addr
-rwxrwxrwx         10 entry_point
-rwxrwxrwx    2199875 data0
-rwxrwxrwx    2199875 data
-rwxrwxrwx         10 data.crc

if it's multi image

 # ls -l /tmp-multi/
-rwxrwxrwx          3 arch
-rwxrwxrwx         12 compression
-rwxrwxrwx         16 name
-rwxrwxrwx          5 os
-rwxrwxrwx         24 time
-rwxrwxrwx         16 type
-rwxrwxrwx         10 load_addr
-rwxrwxrwx         10 entry_point
-rwxrwxrwx       1292 data0
-rwxrwxrwx        983 data1
-rwxrwxrwx       2287 data
-rwxrwxrwx         10 data.crc

you can get the image header via an ioctl on any file
UIMAGEFS_METADATA

if you want to check the crc do

 # crc32 -f /tmp-multi/data -V /tmp-multi/data.crc
CRC32 for /tmp-multi/data 0x00000000 ... 0x000008ee ==> 0x88d5a0db

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 53 insertions, 0 deletions

diff --git a/include/uimagefs.h b/include/uimagefs.h
new file mode 100644
index 0000000000..81b32310ad
--- /dev/null
+++ b/include/uimagefs.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2013 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * under GPLv2 only
+ */
+
+#ifndef __UIMAGEFS_H__
+#define __UIMAGEFS_H__
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <image.h>
+#include <ioctl.h>
+
+#define UIMAGEFS_METADATA	_IOR('U', 100, struct image_header)
+
+enum uimagefs_type {
+	UIMAGEFS_DATA,
+	UIMAGEFS_DATA_CRC,
+	UIMAGEFS_NAME,
+	UIMAGEFS_TIME,
+	UIMAGEFS_LOAD,
+	UIMAGEFS_EP,
+	UIMAGEFS_OS,
+	UIMAGEFS_ARCH,
+	UIMAGEFS_TYPE,
+	UIMAGEFS_COMP,
+};
+
+struct uimagefs_handle_data {
+	char *name;
+	enum uimagefs_type type;
+	uint64_t size;
+
+	int fd;
+	size_t offset; /* offset in the image */
+	size_t pos; /* pos in the data */
+
+	char *data;
+
+	struct list_head list;
+};
+
+struct uimagefs_handle {
+	struct image_header header;
+	int nb_data_entries;
+	char *filename;
+	char *tmp;
+
+	struct list_head list;
+};
+
+#endif /* __UIMAGEFS_H__ */