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Diffstat (limited to 'include/linux/efs_fs_i.h')
-rw-r--r-- | include/linux/efs_fs_i.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/efs_fs_i.h b/include/linux/efs_fs_i.h new file mode 100644 index 0000000..617c474 --- /dev/null +++ b/include/linux/efs_fs_i.h @@ -0,0 +1,68 @@ +/* + * efs_fs_i.h + * + * Copyright (c) 1999 Al Smith + * + * Portions derived from IRIX header files (c) 1988 Silicon Graphics + */ + +#ifndef __EFS_FS_I_H__ +#define __EFS_FS_I_H__ + +typedef int32_t efs_block_t; +typedef uint32_t efs_ino_t; + +#define EFS_DIRECTEXTENTS 12 + +/* + * layout of an extent, in memory and on disk. 8 bytes exactly. + */ +typedef union extent_u { + unsigned char raw[8]; + struct extent_s { + unsigned int ex_magic:8; /* magic # (zero) */ + unsigned int ex_bn:24; /* basic block */ + unsigned int ex_length:8; /* numblocks in this extent */ + unsigned int ex_offset:24; /* logical offset into file */ + } cooked; +} efs_extent; + +typedef struct edevs { + __be16 odev; + __be32 ndev; +} efs_devs; + +/* + * extent based filesystem inode as it appears on disk. The efs inode + * is exactly 128 bytes long. + */ +struct efs_dinode { + __be16 di_mode; /* mode and type of file */ + __be16 di_nlink; /* number of links to file */ + __be16 di_uid; /* owner's user id */ + __be16 di_gid; /* owner's group id */ + __be32 di_size; /* number of bytes in file */ + __be32 di_atime; /* time last accessed */ + __be32 di_mtime; /* time last modified */ + __be32 di_ctime; /* time created */ + __be32 di_gen; /* generation number */ + __be16 di_numextents; /* # of extents */ + u_char di_version; /* version of inode */ + u_char di_spare; /* spare - used by AFS */ + union di_addr { + efs_extent di_extents[EFS_DIRECTEXTENTS]; + efs_devs di_dev; /* device for IFCHR/IFBLK */ + } di_u; +}; + +/* efs inode storage in memory */ +struct efs_inode_info { + int numextents; + int lastextent; + + efs_extent extents[EFS_DIRECTEXTENTS]; + struct inode vfs_inode; +}; + +#endif /* __EFS_FS_I_H__ */ + |