Adding upstream version 2.38.1.upstream/2.38.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/disk-utils/cramfs.h b/disk-utils/cramfs.h
new file mode 100644
index 0000000..e0ddbda
--- /dev/null
+++ b/disk-utils/cramfs.h
@@ -0,0 +1,114 @@
+/*
+ * cramfs_common - cramfs common code
+ *
+ * Copyright (c) 2008 Roy Peled, the.roy.peled  -at-  gmail
+ * Copyright (c) 2004-2006 by Juliane Holzt, kju -at- fqdn.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __CRAMFS_H
+#define __CRAMFS_H
+
+#include <stdint.h>
+
+#define CRAMFS_MAGIC		0x28cd3d45	/* some random number */
+#define CRAMFS_SIGNATURE	"Compressed ROMFS"
+
+/*
+ * Width of various bitfields in struct cramfs_inode.
+ * Primarily used to generate warnings in mkcramfs.
+ */
+#define CRAMFS_MODE_WIDTH 16
+#define CRAMFS_UID_WIDTH 16
+#define CRAMFS_SIZE_WIDTH 24
+#define CRAMFS_GID_WIDTH 8
+#define CRAMFS_NAMELEN_WIDTH 6
+#define CRAMFS_OFFSET_WIDTH 26
+
+#ifndef HOST_IS_BIG_ENDIAN
+#ifdef WORDS_BIGENDIAN
+#define HOST_IS_BIG_ENDIAN 1
+#else
+#define HOST_IS_BIG_ENDIAN 0
+#endif
+#endif
+
+/*
+ * Reasonably terse representation of the inode data.
+ */
+struct cramfs_inode {
+	uint32_t mode:16, uid:16;
+	/* SIZE for device files is i_rdev */
+	uint32_t size:24, gid:8;
+	/*
+	 * NAMELEN is the length of the file name, divided by 4 and
+	 * rounded up.  (cramfs doesn't support hard links.)
+	 *
+	 * OFFSET: For symlinks and non-empty regular files, this
+	 * contains the offset (divided by 4) of the file data in
+	 * compressed form (starting with an array of block pointers;
+	 * see README).  For non-empty directories it is the offset
+	 * (divided by 4) of the inode of the first file in that
+	 * directory.  For anything else, offset is zero.
+	 */
+	uint32_t namelen:6, offset:26;
+};
+
+struct cramfs_info {
+	uint32_t crc;
+	uint32_t edition;
+	uint32_t blocks;
+	uint32_t files;
+};
+
+/*
+ * Superblock information at the beginning of the FS.
+ */
+struct cramfs_super {
+	uint32_t magic;		/* 0x28cd3d45 - random number */
+	uint32_t size;		/* Not used.  mkcramfs currently
+				   writes a constant 1<<16 here. */
+	uint32_t flags;		/* 0 */
+	uint32_t future;		/* 0 */
+	uint8_t signature[16];	/* "Compressed ROMFS" */
+	struct cramfs_info fsid;/* unique filesystem info */
+	uint8_t name[16];		/* user-defined name */
+	struct cramfs_inode root;	/* Root inode data */
+};
+
+#define CRAMFS_FLAG_FSID_VERSION_2	0x00000001	/* fsid version #2 */
+#define CRAMFS_FLAG_SORTED_DIRS		0x00000002	/* sorted dirs */
+#define CRAMFS_FLAG_HOLES		0x00000100	/* support for holes */
+#define CRAMFS_FLAG_WRONG_SIGNATURE	0x00000200	/* reserved */
+#define CRAMFS_FLAG_SHIFTED_ROOT_OFFSET 0x00000400	/* shifted root fs */
+
+/*
+ * Valid values in super.flags.  Currently we refuse to mount
+ * if (flags & ~CRAMFS_SUPPORTED_FLAGS).  Maybe that should be
+ * changed to test super.future instead.
+ */
+#define CRAMFS_SUPPORTED_FLAGS (0xff)
+
+/* Uncompression interfaces to the underlying zlib */
+int cramfs_uncompress_block(void *dst, int dstlen, void *src, int srclen);
+int cramfs_uncompress_init(void);
+int cramfs_uncompress_exit(void);
+
+uint32_t u32_toggle_endianness(int big_endian, uint32_t what);
+void super_toggle_endianness(int from_big_endian, struct cramfs_super *super);
+void inode_to_host(int from_big_endian, struct cramfs_inode *inode_in,
+		   struct cramfs_inode *inode_out);
+void inode_from_host(int to_big_endian, struct cramfs_inode *inode_in,
+		     struct cramfs_inode *inode_out);
+
+#endif