patch-2.3.35 linux/fs/cramfs/cramfs.h

• Lines: 42
• Date: Tue Nov 23 16:18:54 1999
• Orig file: v2.3.34/linux/fs/cramfs/cramfs.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.34/linux/fs/cramfs/cramfs.h linux/fs/cramfs/cramfs.h
@@ -0,0 +1,41 @@
+#ifndef __CRAMFS_H
+#define __CRAMFS_H
+
+#define CRAMFS_MAGIC		0x28cd3d45	/* some random number */
+#define CRAMFS_SIGNATURE	"Compressed ROMFS"
+
+/*
+ * Reasonably terse representation of the inode
+ * data.. When the mode of the inode indicates
+ * a special device node, the "offset" bits will
+ * encode i_rdev. In other cases, "offset" points
+ * to the ROM image for the actual file data
+ * (whether that data be directory or compressed
+ * file data depends on the inode type again)
+ */
+struct cramfs_inode {
+	u32 mode:16, uid:16;
+	u32 size:24, gid:8;
+	u32 namelen:6, offset:26;
+};
+
+/*
+ * Superblock information at the beginning of the FS.
+ */
+struct cramfs_super {
+	u32 magic;		/* 0x28cd3d45 - random number */
+	u32 size;		/* > offset, < 2**26 */
+	u32 flags;		/* 0 */
+	u32 future;		/* 0 */
+	u8 signature[16];	/* "Compressed ROMFS" */
+	u8 fsid[16];		/* random number */
+	u8 name[16];		/* user-defined name */
+	struct cramfs_inode root;	/* Root inode data */
+};
+
+/* 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);
+
+#endif