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69 lines
1.6 KiB
69 lines
1.6 KiB
20 years ago
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/*
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* efs_fs_i.h
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*
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* Copyright (c) 1999 Al Smith
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*
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* Portions derived from IRIX header files (c) 1988 Silicon Graphics
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*/
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#ifndef __EFS_FS_I_H__
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#define __EFS_FS_I_H__
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typedef int32_t efs_block_t;
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typedef uint32_t efs_ino_t;
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#define EFS_DIRECTEXTENTS 12
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/*
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* layout of an extent, in memory and on disk. 8 bytes exactly.
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*/
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typedef union extent_u {
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unsigned char raw[8];
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struct extent_s {
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unsigned int ex_magic:8; /* magic # (zero) */
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unsigned int ex_bn:24; /* basic block */
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unsigned int ex_length:8; /* numblocks in this extent */
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unsigned int ex_offset:24; /* logical offset into file */
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} cooked;
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} efs_extent;
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typedef struct edevs {
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__be16 odev;
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__be32 ndev;
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} efs_devs;
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/*
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* extent based filesystem inode as it appears on disk. The efs inode
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* is exactly 128 bytes long.
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*/
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struct efs_dinode {
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__be16 di_mode; /* mode and type of file */
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__be16 di_nlink; /* number of links to file */
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__be16 di_uid; /* owner's user id */
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__be16 di_gid; /* owner's group id */
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__be32 di_size; /* number of bytes in file */
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__be32 di_atime; /* time last accessed */
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__be32 di_mtime; /* time last modified */
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__be32 di_ctime; /* time created */
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__be32 di_gen; /* generation number */
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__be16 di_numextents; /* # of extents */
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u_char di_version; /* version of inode */
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u_char di_spare; /* spare - used by AFS */
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union di_addr {
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efs_extent di_extents[EFS_DIRECTEXTENTS];
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efs_devs di_dev; /* device for IFCHR/IFBLK */
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} di_u;
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};
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/* efs inode storage in memory */
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struct efs_inode_info {
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int numextents;
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int lastextent;
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efs_extent extents[EFS_DIRECTEXTENTS];
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struct inode vfs_inode;
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};
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#endif /* __EFS_FS_I_H__ */
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