diff options
Diffstat (limited to 'linux-2.4.x/include/linux/jffs2.h')
| -rw-r--r-- | linux-2.4.x/include/linux/jffs2.h | 195 |
1 files changed, 115 insertions, 80 deletions
diff --git a/linux-2.4.x/include/linux/jffs2.h b/linux-2.4.x/include/linux/jffs2.h index 9c67732..9720da1 100644 --- a/linux-2.4.x/include/linux/jffs2.h +++ b/linux-2.4.x/include/linux/jffs2.h @@ -1,53 +1,41 @@ /* * JFFS2 -- Journalling Flash File System, Version 2. * - * Copyright (C) 2001 Red Hat, Inc. + * Copyright (C) 2001-2003 Red Hat, Inc. * - * Created by David Woodhouse <dwmw2@cambridge.redhat.com> + * Created by David Woodhouse <dwmw2@infradead.org> * - * The original JFFS, from which the design for JFFS2 was derived, - * was designed and implemented by Axis Communications AB. + * For licensing information, see the file 'LICENCE' in the + * jffs2 directory. * - * 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 1.19 2001/10/09 13:20:23 dwmw2 Exp $ + * $Id: jffs2.h,v 1.40 2005/11/07 11:14:51 gleixner Exp $ * */ #ifndef __LINUX_JFFS2_H__ #define __LINUX_JFFS2_H__ -#include <asm/types.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 0x5981 /* For detecting wrong-endian fs */ +#define KSAMTIB_CIGAM_2SFFJ 0x8519 /* For detecting wrong-endian fs */ #define JFFS2_EMPTY_BITMASK 0xffff #define JFFS2_DIRTY_BITMASK 0x0000 +/* JFFS2 eraseblock header compat/incompat/rocompat features set */ +#define JFFS2_EBH_COMPAT_FSET 0x00 +#define JFFS2_EBH_INCOMPAT_FSET 0x00 +#define JFFS2_EBH_ROCOMPAT_FSET 0x00 + +/* Summary node MAGIC marker */ +#define JFFS2_SUM_MAGIC 0x02851885 + /* 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. */ @@ -78,86 +66,133 @@ #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) + +#define JFFS2_NODETYPE_ERASEBLOCK_HEADER (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 5) +#define JFFS2_NODETYPE_SUMMARY (JFFS2_FEATURE_RWCOMPAT_DELETE | JFFS2_NODE_ACCURATE | 6) // 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 +#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 +#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 */ - __u16 magic; - __u16 nodetype; - __u32 totlen; /* So we can skip over nodes we don't grok */ - __u32 hdr_crc; + 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 { - __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]; + jint16_t magic; + jint16_t nodetype; /* == JFFS2_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 +/* 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]; + jint16_t magic; /* A constant magic number. */ + jint16_t nodetype; /* == JFFS2_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)); + +struct jffs2_raw_summary +{ + jint16_t magic; + jint16_t nodetype; /* = JFFS2_NODETYPE_SUMMARY */ + jint32_t totlen; + jint32_t hdr_crc; + jint32_t sum_num; /* number of sum entries*/ + jint32_t cln_mkr; /* clean marker size, 0 = no cleanmarker */ + jint32_t padded; /* sum of the size of padding nodes */ + jint32_t sum_crc; /* summary information crc */ + jint32_t node_crc; /* node crc */ + jint32_t sum[0]; /* inode summary info */ } __attribute__((packed)); -union jffs2_node_union { +struct jffs2_raw_ebh +{ + jint16_t magic; + jint16_t nodetype; /* == JFFS2_NODETYPE_ERASEBLOCK_HEADER */ + jint32_t totlen; + jint32_t hdr_crc; + jint32_t node_crc; + uint8_t reserved; /* reserved for future use and alignment */ + uint8_t compat_fset; + uint8_t incompat_fset; + uint8_t rocompat_fset; + jint32_t erase_count; /* the erase count of this erase block */ + jint32_t data[0]; +} __attribute__((packed)); + + +union jffs2_node_union +{ struct jffs2_raw_inode i; struct jffs2_raw_dirent d; + struct jffs2_raw_summary s; + struct jffs2_raw_ebh eh; struct jffs2_unknown_node u; }; |