| 1 | /* Inode table. This table holds inodes that are currently in use. In some
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| 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 | * The disk inode part is also declared in "type.h" as 'd1_inode' for V1
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| 8 | * file systems and 'd2_inode' for V2 file systems.
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| 9 | */
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| 10 |
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| 11 | EXTERN struct inode {
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| 12 | mode_t i_mode; /* file type, protection, etc. */
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| 13 | nlink_t i_nlinks; /* how many links to this file */
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| 14 | uid_t i_uid; /* user id of the file's owner */
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| 15 | gid_t i_gid; /* group number */
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| 16 | off_t i_size; /* current file size in bytes */
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| 17 | time_t i_atime; /* time of last access (V2 only) */
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| 18 | time_t i_mtime; /* when was file data last changed */
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| 19 | time_t i_ctime; /* when was inode itself changed (V2 only)*/
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| 20 | zone_t i_zone[V2_NR_TZONES]; /* zone numbers for direct, ind, and dbl ind */
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| 21 |
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| 22 | /* The following items are not present on the disk. */
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| 23 | dev_t i_dev; /* which device is the inode on */
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| 24 | ino_t i_num; /* inode number on its (minor) device */
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| 25 | int i_count; /* # times inode used; 0 means slot is free */
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| 26 | int i_ndzones; /* # direct zones (Vx_NR_DZONES) */
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| 27 | int i_nindirs; /* # indirect zones per indirect block */
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| 28 | struct super_block *i_sp; /* pointer to super block for inode's device */
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| 29 | char i_dirt; /* CLEAN or DIRTY */
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| 30 | char i_pipe; /* set to I_PIPE if pipe */
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| 31 | char i_mount; /* this bit is set if file mounted on */
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| 32 | char i_seek; /* set on LSEEK, cleared on READ/WRITE */
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| 33 | char i_update; /* the ATIME, CTIME, and MTIME bits are here */
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| 34 | } inode[NR_INODES];
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| 35 |
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| 36 | #define NIL_INODE (struct inode *) 0 /* indicates absence of inode slot */
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| 37 |
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| 38 | /* Field values. Note that CLEAN and DIRTY are defined in "const.h" */
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| 39 | #define NO_PIPE 0 /* i_pipe is NO_PIPE if inode is not a pipe */
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| 40 | #define I_PIPE 1 /* i_pipe is I_PIPE if inode is a pipe */
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| 41 | #define NO_MOUNT 0 /* i_mount is NO_MOUNT if file not mounted on*/
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| 42 | #define I_MOUNT 1 /* i_mount is I_MOUNT if file mounted on */
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| 43 | #define NO_SEEK 0 /* i_seek = NO_SEEK if last op was not SEEK */
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| 44 | #define ISEEK 1 /* i_seek = ISEEK if last op was SEEK */
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