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| Rev | Author | Line No. | Line |
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| 2372 | konopa | 1 | /* Inode table. This table holds inodes that are currently in use. In some |
| 2 | * cases they have been opened by an open() or creat() system call, in other |
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| 3 | * cases the file system itself needs the inode for one reason or another, |
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| 4 | * such as to search a directory for a path name. |
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| 5 | * The first part of the struct holds fields that are present on the |
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| 6 | * disk; the second part holds fields not present on the disk. |
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| 7 | */ |
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| 8 | |||
| 9 | #ifndef _INODE_H |
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| 10 | #define _INODE_H |
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| 11 | |||
| 12 | #include "super.h" |
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| 13 | |||
| 14 | #define NIL_INODE (inode_t *) 0 /* indicates absence of inode slot */ |
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| 15 | |||
| 16 | #define NO_SEEK 0 /* i_seek = NO_SEEK if last op was not SEEK */ |
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| 17 | #define ISEEK 1 /* i_seek = ISEEK if last op was SEEK */ |
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| 18 | |||
| 19 | typedef struct { |
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| 20 | mode_t i_mode; /* file type, protection, etc. */ |
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| 21 | nlink_t i_nlinks; /* how many links to this file */ |
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| 22 | offset_t i_size; /* current file size in bytes */ |
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| 23 | zone_t i_zone[V2_NR_TZONES]; /* zone numbers for direct, ind, and dbl ind */ |
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| 24 | |||
| 25 | /* The following items are not present on the disk. */ |
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| 26 | dev_t i_dev; /* which device is the inode on */ |
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| 27 | ino_t i_num; /* inode number on its (minor) device */ |
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| 28 | int i_count; /* # times inode used; 0 means slot is free */ |
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| 29 | int i_ndzones; /* # direct zones (NR_DZONES) */ |
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| 30 | int i_nindirs; /* # indirect zones per indirect block */ |
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| 31 | super_block_t *i_sp; /* pointer to super block for inode's device */ |
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| 32 | char i_seek; /* set on LSEEK, cleared on READ */ |
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| 33 | } inode_t; |
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| 34 | |||
| 35 | extern inode_t inode[NR_INODES]; |
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| 36 | |||
| 37 | #endif /* _INODE_H */ |