^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (c) 1999 Al Smith
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Portions derived from IRIX header files (c) 1988 Silicon Graphics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #ifndef _EFS_EFS_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define _EFS_EFS_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #ifdef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define EFS_VERSION "1.0a"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static const char cprt[] = "EFS: "EFS_VERSION" - (c) 1999 Al Smith <Al.Smith@aeschi.ch.eu.org>";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* 1 block is 512 bytes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define EFS_BLOCKSIZE_BITS 9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define EFS_BLOCKSIZE (1 << EFS_BLOCKSIZE_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) typedef int32_t efs_block_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) typedef uint32_t efs_ino_t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define EFS_DIRECTEXTENTS 12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * layout of an extent, in memory and on disk. 8 bytes exactly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) typedef union extent_u {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned char raw[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct extent_s {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) unsigned int ex_magic:8; /* magic # (zero) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned int ex_bn:24; /* basic block */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned int ex_length:8; /* numblocks in this extent */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) unsigned int ex_offset:24; /* logical offset into file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) } cooked;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) } efs_extent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) typedef struct edevs {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) __be16 odev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) __be32 ndev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) } efs_devs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * extent based filesystem inode as it appears on disk. The efs inode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * is exactly 128 bytes long.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct efs_dinode {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) __be16 di_mode; /* mode and type of file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) __be16 di_nlink; /* number of links to file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) __be16 di_uid; /* owner's user id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) __be16 di_gid; /* owner's group id */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) __be32 di_size; /* number of bytes in file */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) __be32 di_atime; /* time last accessed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) __be32 di_mtime; /* time last modified */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) __be32 di_ctime; /* time created */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) __be32 di_gen; /* generation number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) __be16 di_numextents; /* # of extents */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) u_char di_version; /* version of inode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) u_char di_spare; /* spare - used by AFS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) union di_addr {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) efs_extent di_extents[EFS_DIRECTEXTENTS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) efs_devs di_dev; /* device for IFCHR/IFBLK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) } di_u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* efs inode storage in memory */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct efs_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) int numextents;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) int lastextent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) efs_extent extents[EFS_DIRECTEXTENTS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #include <linux/efs_fs_sb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) #define EFS_DIRBSIZE_BITS EFS_BLOCKSIZE_BITS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define EFS_DIRBSIZE (1 << EFS_DIRBSIZE_BITS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) struct efs_dentry {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) __be32 inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) unsigned char namelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) char name[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #define EFS_DENTSIZE (sizeof(struct efs_dentry) - 3 + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) #define EFS_MAXNAMELEN ((1 << (sizeof(char) * 8)) - 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #define EFS_DIRBLK_HEADERSIZE 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #define EFS_DIRBLK_MAGIC 0xbeef /* moo */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct efs_dir {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) __be16 magic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned char firstused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned char slots;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) unsigned char space[EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define EFS_MAXENTS \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ((EFS_DIRBSIZE - EFS_DIRBLK_HEADERSIZE) / \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) (EFS_DENTSIZE + sizeof(char)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define EFS_SLOTAT(dir, slot) EFS_REALOFF((dir)->space[slot])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define EFS_REALOFF(offset) ((offset << 1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static inline struct efs_inode_info *INODE_INFO(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return container_of(inode, struct efs_inode_info, vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static inline struct efs_sb_info *SUPER_INFO(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct statfs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct fid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) extern const struct inode_operations efs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) extern const struct file_operations efs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) extern const struct address_space_operations efs_symlink_aops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) extern struct inode *efs_iget(struct super_block *, unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) extern efs_block_t efs_map_block(struct inode *, efs_block_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) extern int efs_get_block(struct inode *, sector_t, struct buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) extern struct dentry *efs_lookup(struct inode *, struct dentry *, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) extern struct dentry *efs_fh_to_dentry(struct super_block *sb, struct fid *fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) int fh_len, int fh_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) extern struct dentry *efs_fh_to_parent(struct super_block *sb, struct fid *fid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) int fh_len, int fh_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) extern struct dentry *efs_get_parent(struct dentry *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) extern int efs_bmap(struct inode *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) #endif /* _EFS_EFS_H_ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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