1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (c) 1999 Al Smith, <Al.Smith@aeschi.ch.eu.org>
  4 *
  5 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
  6 * Portions derived from IRIX header files (c) 1988 Silicon Graphics
  7 */
  8#ifndef _EFS_EFS_H_
  9#define _EFS_EFS_H_
 10
 11#ifdef pr_fmt
 12#undef pr_fmt
 13#endif
 14
 15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 16
 17#include <linux/fs.h>
 18#include <linux/uaccess.h>
 19
 20#define EFS_VERSION "1.0a"
 
 
 
 21
 22/* 1 block is 512 bytes */
 23#define	EFS_BLOCKSIZE_BITS	9
 24#define	EFS_BLOCKSIZE		(1 << EFS_BLOCKSIZE_BITS)
 25
 26typedef	int32_t		efs_block_t;
 27typedef uint32_t	efs_ino_t;
 28
 29#define	EFS_DIRECTEXTENTS	12
 30
 31/*
 32 * layout of an extent, in memory and on disk. 8 bytes exactly.
 33 */
 34typedef union extent_u {
 35	unsigned char raw[8];
 36	struct extent_s {
 37		unsigned int	ex_magic:8;	/* magic # (zero) */
 38		unsigned int	ex_bn:24;	/* basic block */
 39		unsigned int	ex_length:8;	/* numblocks in this extent */
 40		unsigned int	ex_offset:24;	/* logical offset into file */
 41	} cooked;
 42} efs_extent;
 43
 44typedef struct edevs {
 45	__be16		odev;
 46	__be32		ndev;
 47} efs_devs;
 48
 49/*
 50 * extent based filesystem inode as it appears on disk.  The efs inode
 51 * is exactly 128 bytes long.
 52 */
 53struct	efs_dinode {
 54	__be16		di_mode;	/* mode and type of file */
 55	__be16		di_nlink;	/* number of links to file */
 56	__be16		di_uid;		/* owner's user id */
 57	__be16		di_gid;		/* owner's group id */
 58	__be32		di_size;	/* number of bytes in file */
 59	__be32		di_atime;	/* time last accessed */
 60	__be32		di_mtime;	/* time last modified */
 61	__be32		di_ctime;	/* time created */
 62	__be32		di_gen;		/* generation number */
 63	__be16		di_numextents;	/* # of extents */
 64	u_char		di_version;	/* version of inode */
 65	u_char		di_spare;	/* spare - used by AFS */
 66	union di_addr {
 67		efs_extent	di_extents[EFS_DIRECTEXTENTS];
 68		efs_devs	di_dev;	/* device for IFCHR/IFBLK */
 69	} di_u;
 70};
 71
 72/* efs inode storage in memory */
 73struct efs_inode_info {
 74	int		numextents;
 75	int		lastextent;
 76
 77	efs_extent	extents[EFS_DIRECTEXTENTS];
 78	struct inode	vfs_inode;
 79};
 80
 81#include <linux/efs_fs_sb.h>
 82
 83#define EFS_DIRBSIZE_BITS	EFS_BLOCKSIZE_BITS
 84#define EFS_DIRBSIZE		(1 << EFS_DIRBSIZE_BITS)
 85
 86struct efs_dentry {
 87	__be32		inode;
 88	unsigned char	namelen;
 89	char		name[3];
 90};
 91
 92#define EFS_DENTSIZE	(sizeof(struct efs_dentry) - 3 + 1)
 93#define EFS_MAXNAMELEN  ((1 << (sizeof(char) * 8)) - 1)
 94
 95#define EFS_DIRBLK_HEADERSIZE	4
 96#define EFS_DIRBLK_MAGIC	0xbeef	/* moo */
 97
 98struct efs_dir {
 99	__be16	magic;
100	unsigned char	firstused;
101	unsigned char	slots;
102
103	unsigned char	space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
104};
105
106#define EFS_MAXENTS \
107	((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
108	 (EFS_DENTSIZE + sizeof(char)))
109
110#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
111
112#define EFS_REALOFF(offset) ((offset << 1))
113
114
115static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
116{
117	return container_of(inode, struct efs_inode_info, vfs_inode);
118}
119
120static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
121{
122	return sb->s_fs_info;
123}
124
125struct statfs;
126struct fid;
127
128extern const struct inode_operations efs_dir_inode_operations;
129extern const struct file_operations efs_dir_operations;
130extern const struct address_space_operations efs_symlink_aops;
131
132extern struct inode *efs_iget(struct super_block *, unsigned long);
133extern efs_block_t efs_map_block(struct inode *, efs_block_t);
134extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
135
136extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
137extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
138		int fh_len, int fh_type);
139extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
140		int fh_len, int fh_type);
141extern struct dentry *efs_get_parent(struct dentry *);
142extern int efs_bmap(struct inode *, int);
143
144#endif /* _EFS_EFS_H_ */

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * Copyright (c) 1999 Al Smith
  4 *
  5 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
  6 * Portions derived from IRIX header files (c) 1988 Silicon Graphics
  7 */
  8#ifndef _EFS_EFS_H_
  9#define _EFS_EFS_H_
 10
 11#ifdef pr_fmt
 12#undef pr_fmt
 13#endif
 14
 15#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 16
 17#include <linux/fs.h>
 18#include <linux/uaccess.h>
 19
 20#define EFS_VERSION "1.0a"
 21
 22static const char cprt[] = "EFS: "EFS_VERSION" - (c) 1999 Al Smith <Al.Smith@aeschi.ch.eu.org>";
 23
 24
 25/* 1 block is 512 bytes */
 26#define	EFS_BLOCKSIZE_BITS	9
 27#define	EFS_BLOCKSIZE		(1 << EFS_BLOCKSIZE_BITS)
 28
 29typedef	int32_t		efs_block_t;
 30typedef uint32_t	efs_ino_t;
 31
 32#define	EFS_DIRECTEXTENTS	12
 33
 34/*
 35 * layout of an extent, in memory and on disk. 8 bytes exactly.
 36 */
 37typedef union extent_u {
 38	unsigned char raw[8];
 39	struct extent_s {
 40		unsigned int	ex_magic:8;	/* magic # (zero) */
 41		unsigned int	ex_bn:24;	/* basic block */
 42		unsigned int	ex_length:8;	/* numblocks in this extent */
 43		unsigned int	ex_offset:24;	/* logical offset into file */
 44	} cooked;
 45} efs_extent;
 46
 47typedef struct edevs {
 48	__be16		odev;
 49	__be32		ndev;
 50} efs_devs;
 51
 52/*
 53 * extent based filesystem inode as it appears on disk.  The efs inode
 54 * is exactly 128 bytes long.
 55 */
 56struct	efs_dinode {
 57	__be16		di_mode;	/* mode and type of file */
 58	__be16		di_nlink;	/* number of links to file */
 59	__be16		di_uid;		/* owner's user id */
 60	__be16		di_gid;		/* owner's group id */
 61	__be32		di_size;	/* number of bytes in file */
 62	__be32		di_atime;	/* time last accessed */
 63	__be32		di_mtime;	/* time last modified */
 64	__be32		di_ctime;	/* time created */
 65	__be32		di_gen;		/* generation number */
 66	__be16		di_numextents;	/* # of extents */
 67	u_char		di_version;	/* version of inode */
 68	u_char		di_spare;	/* spare - used by AFS */
 69	union di_addr {
 70		efs_extent	di_extents[EFS_DIRECTEXTENTS];
 71		efs_devs	di_dev;	/* device for IFCHR/IFBLK */
 72	} di_u;
 73};
 74
 75/* efs inode storage in memory */
 76struct efs_inode_info {
 77	int		numextents;
 78	int		lastextent;
 79
 80	efs_extent	extents[EFS_DIRECTEXTENTS];
 81	struct inode	vfs_inode;
 82};
 83
 84#include <linux/efs_fs_sb.h>
 85
 86#define EFS_DIRBSIZE_BITS	EFS_BLOCKSIZE_BITS
 87#define EFS_DIRBSIZE		(1 << EFS_DIRBSIZE_BITS)
 88
 89struct efs_dentry {
 90	__be32		inode;
 91	unsigned char	namelen;
 92	char		name[3];
 93};
 94
 95#define EFS_DENTSIZE	(sizeof(struct efs_dentry) - 3 + 1)
 96#define EFS_MAXNAMELEN  ((1 << (sizeof(char) * 8)) - 1)
 97
 98#define EFS_DIRBLK_HEADERSIZE	4
 99#define EFS_DIRBLK_MAGIC	0xbeef	/* moo */
100
101struct efs_dir {
102	__be16	magic;
103	unsigned char	firstused;
104	unsigned char	slots;
105
106	unsigned char	space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
107};
108
109#define EFS_MAXENTS \
110	((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
111	 (EFS_DENTSIZE + sizeof(char)))
112
113#define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
114
115#define EFS_REALOFF(offset) ((offset << 1))
116
117
118static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
119{
120	return container_of(inode, struct efs_inode_info, vfs_inode);
121}
122
123static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
124{
125	return sb->s_fs_info;
126}
127
128struct statfs;
129struct fid;
130
131extern const struct inode_operations efs_dir_inode_operations;
132extern const struct file_operations efs_dir_operations;
133extern const struct address_space_operations efs_symlink_aops;
134
135extern struct inode *efs_iget(struct super_block *, unsigned long);
136extern efs_block_t efs_map_block(struct inode *, efs_block_t);
137extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
138
139extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
140extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
141		int fh_len, int fh_type);
142extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
143		int fh_len, int fh_type);
144extern struct dentry *efs_get_parent(struct dentry *);
145extern int efs_bmap(struct inode *, int);
146
147#endif /* _EFS_EFS_H_ */