patch-2.4.10 linux/include/linux/jffs2.h

• Lines: 165
• Date: Fri Sep 14 14:04:07 2001
• Orig file: v2.4.9/linux/include/linux/jffs2.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/include/linux/jffs2.h linux/include/linux/jffs2.h
@@ -0,0 +1,164 @@
+/*
+ * 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 1.18 2001/03/25 22:36:12 dwmw2 Exp $
+ *
+ */
+
+#ifndef __LINUX_JFFS2_H__
+#define __LINUX_JFFS2_H__
+
+#include <asm/types.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
+/* 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;
+};
+
+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];
+};
+
+/* 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];
+};
+
+union jffs2_node_union {
+	struct jffs2_raw_inode i;
+	struct jffs2_raw_dirent d;
+	struct jffs2_unknown_node u;
+};
+
+#endif /* __LINUX_JFFS2_H__ */