summaryrefslogtreecommitdiff
path: root/include/jffs2/jffs2.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/jffs2/jffs2.h')
-rw-r--r--include/jffs2/jffs2.h208
1 files changed, 208 insertions, 0 deletions
diff --git a/include/jffs2/jffs2.h b/include/jffs2/jffs2.h
new file mode 100644
index 0000000..9098690
--- /dev/null
+++ b/include/jffs2/jffs2.h
@@ -0,0 +1,208 @@
+/*
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ *
+ * Copyright (C) 2001 Red Hat, Inc.
+ *
+ * Created by David Woodhouse <dwmw2@cambridge.redhat.com>
+ *
+ * The original JFFS, from which the design for JFFS2 was derived,
+ * was designed and implemented by Axis Communications AB.
+ *
+ * The contents of this file are subject to the Red Hat eCos Public
+ * License Version 1.1 (the "Licence"); you may not use this file
+ * except in compliance with the Licence. You may obtain a copy of
+ * the Licence at http://www.redhat.com/
+ *
+ * Software distributed under the Licence is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing rights and
+ * limitations under the Licence.
+ *
+ * The Original Code is JFFS2 - Journalling Flash File System, version 2
+ *
+ * Alternatively, the contents of this file may be used under the
+ * terms of the GNU General Public License version 2 (the "GPL"), in
+ * which case the provisions of the GPL are applicable instead of the
+ * above. If you wish to allow the use of your version of this file
+ * only under the terms of the GPL and not to allow others to use your
+ * version of this file under the RHEPL, indicate your decision by
+ * deleting the provisions above and replace them with the notice and
+ * other provisions required by the GPL. If you do not delete the
+ * provisions above, a recipient may use your version of this file
+ * under either the RHEPL or the GPL.
+ *
+ * $Id: jffs2.h,v 1.2 2002/01/17 00:53:20 nyet Exp $
+ *
+ */
+
+#ifndef __LINUX_JFFS2_H__
+#define __LINUX_JFFS2_H__
+
+#include <asm/types.h>
+#include <jffs2/load_kernel.h>
+
+#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 0x5981 /* 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_NUM_COMPR 7
+
+/* 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)
+
+/* 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) */
+
+/* Same as the non_ECC versions, but with extra space for real
+ * ECC instead of just the checksum. For use on NAND flash
+ */
+/*#define JFFS2_NODETYPE_DIRENT_ECC (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 5) */
+/*#define JFFS2_NODETYPE_INODE_ECC (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 6) */
+
+#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 */
+
+
+struct jffs2_unknown_node
+{
+ /* All start like this */
+ __u16 magic;
+ __u16 nodetype;
+ __u32 totlen; /* So we can skip over nodes we don't grok */
+ __u32 hdr_crc;
+} __attribute__((packed));
+
+struct jffs2_raw_dirent
+{
+ __u16 magic;
+ __u16 nodetype; /* == JFFS_NODETYPE_DIRENT */
+ __u32 totlen;
+ __u32 hdr_crc;
+ __u32 pino;
+ __u32 version;
+ __u32 ino; /* == zero for unlink */
+ __u32 mctime;
+ __u8 nsize;
+ __u8 type;
+ __u8 unused[2];
+ __u32 node_crc;
+ __u32 name_crc;
+ __u8 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
+{
+ __u16 magic; /* A constant magic number. */
+ __u16 nodetype; /* == JFFS_NODETYPE_INODE */
+ __u32 totlen; /* Total length of this node (inc data, etc.) */
+ __u32 hdr_crc;
+ __u32 ino; /* Inode number. */
+ __u32 version; /* Version number. */
+ __u32 mode; /* The file's type or mode. */
+ __u16 uid; /* The file's owner. */
+ __u16 gid; /* The file's group. */
+ __u32 isize; /* Total resultant size of this inode (used for truncations) */
+ __u32 atime; /* Last access time. */
+ __u32 mtime; /* Last modification time. */
+ __u32 ctime; /* Change time. */
+ __u32 offset; /* Where to begin to write. */
+ __u32 csize; /* (Compressed) data size */
+ __u32 dsize; /* Size of the node's data. (after decompression) */
+ __u8 compr; /* Compression algorithm used */
+ __u8 usercompr; /* Compression algorithm requested by the user */
+ __u16 flags; /* See JFFS2_INO_FLAG_* */
+ __u32 data_crc; /* CRC for the (compressed) data. */
+ __u32 node_crc; /* CRC for the raw inode (excluding data) */
+/* __u8 data[dsize]; */
+} __attribute__((packed));
+
+union jffs2_node_union {
+ struct jffs2_raw_inode i;
+ struct jffs2_raw_dirent d;
+ struct jffs2_unknown_node u;
+} __attribute__((packed));
+
+enum
+ {
+ DT_UNKNOWN = 0,
+# define DT_UNKNOWN DT_UNKNOWN
+ DT_FIFO = 1,
+# define DT_FIFO DT_FIFO
+ DT_CHR = 2,
+# define DT_CHR DT_CHR
+ DT_DIR = 4,
+# define DT_DIR DT_DIR
+ DT_BLK = 6,
+# define DT_BLK DT_BLK
+ DT_REG = 8,
+# define DT_REG DT_REG
+ DT_LNK = 10,
+# define DT_LNK DT_LNK
+ DT_SOCK = 12,
+# define DT_SOCK DT_SOCK
+ DT_WHT = 14
+# define DT_WHT DT_WHT
+ };
+
+
+u32 jffs2_1pass_ls(struct part_info *part,const char *fname);
+u32 jffs2_1pass_load(char *dest, struct part_info *part,const char *fname);
+u32 jffs2_1pass_info(struct part_info *part);
+
+void rtime_decompress(unsigned char *data_in, unsigned char *cpage_out, u32
+ srclen, u32 destlen);
+void rubin_do_decompress(unsigned char *bits, unsigned char *in, unsigned char
+ *page_out, __u32 destlen);
+void dynrubin_decompress(unsigned char *data_in, unsigned char *cpage_out,
+ unsigned long sourcelen, unsigned long dstlen);
+long zlib_decompress(unsigned char *data_in, unsigned char *cpage_out,
+ __u32 srclen, __u32 destlen);
+
+
+
+
+
+#endif /* __LINUX_JFFS2_H__ */