1 files changed, 157 insertions, 0 deletions

diff --git a/include/linux/jffs2.h b/include/linux/jffs2.h
new file mode 100644
index 000000000000..419fc953ac16
--- /dev/null
+++ b/include/linux/jffs2.h
@@ -0,0 +1,157 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001-2003 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@infradead.org>
+ *
+ * For licensing information, see the file 'LICENCE' in the 
+ * jffs2 directory.
+ *
+ * $Id: jffs2.h,v 1.34 2004/11/16 20:36:14 dwmw2 Exp $
+ *
+ */
+
+#ifndef __LINUX_JFFS2_H__
+#define __LINUX_JFFS2_H__
+
+/* You must include something which defines the C99 uintXX_t types. 
+   We don't do it from here because this file is used in too many
+   different environments. */
+
+#define JFFS2_SUPER_MAGIC 0x72b6
+
+/* Values we may expect to find in the 'magic' field */
+#define JFFS2_OLD_MAGIC_BITMASK 0x1984
+#define JFFS2_MAGIC_BITMASK 0x1985
+#define KSAMTIB_CIGAM_2SFFJ 0x8519 /* For detecting wrong-endian fs */
+#define JFFS2_EMPTY_BITMASK 0xffff
+#define JFFS2_DIRTY_BITMASK 0x0000
+
+/* We only allow a single char for length, and 0xFF is empty flash so
+   we don't want it confused with a real length. Hence max 254.
+*/
+#define JFFS2_MAX_NAME_LEN 254
+
+/* How small can we sensibly write nodes? */
+#define JFFS2_MIN_DATA_LEN 128
+
+#define JFFS2_COMPR_NONE        0x00
+#define JFFS2_COMPR_ZERO        0x01
+#define JFFS2_COMPR_RTIME       0x02
+#define JFFS2_COMPR_RUBINMIPS   0x03
+#define JFFS2_COMPR_COPY        0x04
+#define JFFS2_COMPR_DYNRUBIN    0x05
+#define JFFS2_COMPR_ZLIB        0x06
+#define JFFS2_COMPR_LZO         0x07
+#define JFFS2_COMPR_LZARI       0x08
+/* Compatibility flags. */
+#define JFFS2_COMPAT_MASK 0xc000      /* What do to if an unknown nodetype is found */
+#define JFFS2_NODE_ACCURATE 0x2000
+/* INCOMPAT: Fail to mount the filesystem */
+#define JFFS2_FEATURE_INCOMPAT 0xc000
+/* ROCOMPAT: Mount read-only */
+#define JFFS2_FEATURE_ROCOMPAT 0x8000
+/* RWCOMPAT_COPY: Mount read/write, and copy the node when it's GC'd */
+#define JFFS2_FEATURE_RWCOMPAT_COPY 0x4000
+/* RWCOMPAT_DELETE: Mount read/write, and delete the node when it's GC'd */
+#define JFFS2_FEATURE_RWCOMPAT_DELETE 0x0000
+
+#define JFFS2_NODETYPE_DIRENT (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 1)
+#define JFFS2_NODETYPE_INODE (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 2)
+#define JFFS2_NODETYPE_CLEANMARKER (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 3)
+#define JFFS2_NODETYPE_PADDING (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 4)
+
+// Maybe later...
+//#define JFFS2_NODETYPE_CHECKPOINT (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 3)
+//#define JFFS2_NODETYPE_OPTIONS (JFFS2_FEATURE_RWCOMPAT_COPY | JFFS2_NODE_ACCURATE | 4)
+
+
+#define JFFS2_INO_FLAG_PREREAD    1     /* Do read_inode() for this one at 
+                                           mount time, don't wait for it to 
+                                           happen later */
+#define JFFS2_INO_FLAG_USERCOMPR  2     /* User has requested a specific 
+                                           compression type */
+
+
+/* These can go once we've made sure we've caught all uses without
+   byteswapping */
+
+typedef struct {
+        uint32_t v32;
+} __attribute__((packed))  jint32_t;
+
+typedef struct {
+        uint32_t m;
+} __attribute__((packed))  jmode_t;
+
+typedef struct {
+        uint16_t v16;
+} __attribute__((packed)) jint16_t;
+
+struct jffs2_unknown_node
+{
+        /* All start like this */
+        jint16_t magic;
+        jint16_t nodetype;
+        jint32_t totlen; /* So we can skip over nodes we don't grok */
+        jint32_t hdr_crc;
+} __attribute__((packed));
+
+struct jffs2_raw_dirent
+{
+        jint16_t magic;
+        jint16_t nodetype;      /* == JFFS_NODETYPE_DIRENT */
+        jint32_t totlen;
+        jint32_t hdr_crc;
+        jint32_t pino;
+        jint32_t version;
+        jint32_t ino; /* == zero for unlink */
+        jint32_t mctime;
+        uint8_t nsize;
+        uint8_t type;
+        uint8_t unused[2];
+        jint32_t node_crc;
+        jint32_t name_crc;
+        uint8_t name[0];
+} __attribute__((packed));
+
+/* The JFFS2 raw inode structure: Used for storage on physical media.  */
+/* The uid, gid, atime, mtime and ctime members could be longer, but 
+   are left like this for space efficiency. If and when people decide
+   they really need them extended, it's simple enough to add support for
+   a new type of raw node.
+*/
+struct jffs2_raw_inode
+{
+        jint16_t magic;      /* A constant magic number.  */
+        jint16_t nodetype;   /* == JFFS_NODETYPE_INODE */
+        jint32_t totlen;     /* Total length of this node (inc data, etc.) */
+        jint32_t hdr_crc;
+        jint32_t ino;        /* Inode number.  */
+        jint32_t version;    /* Version number.  */
+        jmode_t mode;       /* The file's type or mode.  */
+        jint16_t uid;        /* The file's owner.  */
+        jint16_t gid;        /* The file's group.  */
+        jint32_t isize;      /* Total resultant size of this inode (used for truncations)  */
+        jint32_t atime;      /* Last access time.  */
+        jint32_t mtime;      /* Last modification time.  */
+        jint32_t ctime;      /* Change time.  */
+        jint32_t offset;     /* Where to begin to write.  */
+        jint32_t csize;      /* (Compressed) data size */
+        jint32_t dsize;      /* Size of the node's data. (after decompression) */
+        uint8_t compr;       /* Compression algorithm used */
+        uint8_t usercompr;   /* Compression algorithm requested by the user */
+        jint16_t flags;      /* See JFFS2_INO_FLAG_* */
+        jint32_t data_crc;   /* CRC for the (compressed) data.  */
+        jint32_t node_crc;   /* CRC for the raw inode (excluding data)  */
+        uint8_t data[0];
+} __attribute__((packed));
+
+union jffs2_node_union {
+        struct jffs2_raw_inode i;
+        struct jffs2_raw_dirent d;
+        struct jffs2_unknown_node u;
+};
+
+#endif /* __LINUX_JFFS2_H__ */