cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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efs.h (3910B)

      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_ */