| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * efs_fs_i.h |
| 3 | * |
| 4 | * Copyright (c) 1999 Al Smith |
| 5 | * |
| 6 | * Portions derived from IRIX header files (c) 1988 Silicon Graphics |
| 7 | */ |
| 8 | |
| 9 | #ifndef __EFS_FS_I_H__ |
| 10 | #define __EFS_FS_I_H__ |
| 11 | |
| 12 | typedef int32_t efs_block_t; |
| 13 | typedef uint32_t efs_ino_t; |
| 14 | |
| 15 | #define EFS_DIRECTEXTENTS 12 |
| 16 | |
| 17 | /* |
| 18 | * layout of an extent, in memory and on disk. 8 bytes exactly. |
| 19 | */ |
| 20 | typedef union extent_u { |
| 21 | unsigned char raw[8]; |
| 22 | struct extent_s { |
| 23 | unsigned int ex_magic:8; /* magic # (zero) */ |
| 24 | unsigned int ex_bn:24; /* basic block */ |
| 25 | unsigned int ex_length:8; /* numblocks in this extent */ |
| 26 | unsigned int ex_offset:24; /* logical offset into file */ |
| 27 | } cooked; |
| 28 | } efs_extent; |
| 29 | |
| 30 | typedef struct edevs { |
| 31 | __be16 odev; |
| 32 | __be32 ndev; |
| 33 | } efs_devs; |
| 34 | |
| 35 | /* |
| 36 | * extent based filesystem inode as it appears on disk. The efs inode |
| 37 | * is exactly 128 bytes long. |
| 38 | */ |
| 39 | struct efs_dinode { |
| 40 | __be16 di_mode; /* mode and type of file */ |
| 41 | __be16 di_nlink; /* number of links to file */ |
| 42 | __be16 di_uid; /* owner's user id */ |
| 43 | __be16 di_gid; /* owner's group id */ |
| 44 | __be32 di_size; /* number of bytes in file */ |
| 45 | __be32 di_atime; /* time last accessed */ |
| 46 | __be32 di_mtime; /* time last modified */ |
| 47 | __be32 di_ctime; /* time created */ |
| 48 | __be32 di_gen; /* generation number */ |
| 49 | __be16 di_numextents; /* # of extents */ |
| 50 | u_char di_version; /* version of inode */ |
| 51 | u_char di_spare; /* spare - used by AFS */ |
| 52 | union di_addr { |
| 53 | efs_extent di_extents[EFS_DIRECTEXTENTS]; |
| 54 | efs_devs di_dev; /* device for IFCHR/IFBLK */ |
| 55 | } di_u; |
| 56 | }; |
| 57 | |
| 58 | /* efs inode storage in memory */ |
| 59 | struct efs_inode_info { |
| 60 | int numextents; |
| 61 | int lastextent; |
| 62 | |
| 63 | efs_extent extents[EFS_DIRECTEXTENTS]; |
| 64 | struct inode vfs_inode; |
| 65 | }; |
| 66 | |
| 67 | #endif /* __EFS_FS_I_H__ */ |
| 68 | |