Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/linux/cramfs_fs.h b/include/linux/cramfs_fs.h
new file mode 100644
index 0000000..a8948f3
--- /dev/null
+++ b/include/linux/cramfs_fs.h
@@ -0,0 +1,98 @@
+#ifndef __CRAMFS_H
+#define __CRAMFS_H
+
+#ifndef __KERNEL__
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+#endif
+
+#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
+
+/*
+ * Since inode.namelen is a unsigned 6-bit number, the maximum cramfs
+ * path length is 63 << 2 = 252.
+ */
+#define CRAMFS_MAXPATHLEN (((1 << CRAMFS_NAMELEN_WIDTH) - 1) << 2)
+
+/*
+ * Reasonably terse representation of the inode data.
+ */
+struct cramfs_inode {
+ u32 mode:CRAMFS_MODE_WIDTH, uid:CRAMFS_UID_WIDTH;
+ /* SIZE for device files is i_rdev */
+ u32 size:CRAMFS_SIZE_WIDTH, gid:CRAMFS_GID_WIDTH;
+ /* 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. */
+ u32 namelen:CRAMFS_NAMELEN_WIDTH, offset:CRAMFS_OFFSET_WIDTH;
+};
+
+struct cramfs_info {
+ u32 crc;
+ u32 edition;
+ u32 blocks;
+ u32 files;
+};
+
+/*
+ * Superblock information at the beginning of the FS.
+ */
+struct cramfs_super {
+ u32 magic; /* 0x28cd3d45 - random number */
+ u32 size; /* length in bytes */
+ u32 flags; /* feature flags */
+ u32 future; /* reserved for future use */
+ u8 signature[16]; /* "Compressed ROMFS" */
+ struct cramfs_info fsid; /* unique filesystem info */
+ u8 name[16]; /* user-defined name */
+ struct cramfs_inode root; /* root inode data */
+};
+
+/*
+ * Feature flags
+ *
+ * 0x00000000 - 0x000000ff: features that work for all past kernels
+ * 0x00000100 - 0xffffffff: features that don't work for past kernels
+ */
+#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 ( 0x000000ff \
+ | CRAMFS_FLAG_HOLES \
+ | CRAMFS_FLAG_WRONG_SIGNATURE \
+ | CRAMFS_FLAG_SHIFTED_ROOT_OFFSET )
+
+/* 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
