/* dinode.h 4.13 82/07/16 */
/* inode.h 2.1 3/25/82 */
* The I node is the focus of all file activity in UNIX.
* There is a unique inode allocated for each active file,
* each current directory, each mounted-on file, text file, and the root.
* An inode is 'named' by its dev/inumber pair. (iget/iget.c)
* Data in icommon is read in from permanent inode on volume.
#define NDADDR 8 /* direct addresses in inode */
#define NIADDR 2 /* indirect addresses in inode */
struct inode
*i_chain
[2]; /* must be first */
u_short i_count
; /* reference count */
dev_t i_dev
; /* device where inode resides */
ino_t i_number
; /* i number, 1-to-1 with device address */
struct fs
*i_fs
; /* file sys associated with this inode */
struct dquot
*i_dquot
; /* quota structure controlling this file */
daddr_t if_lastr
; /* last read (read-ahead) */
struct socket
*is_socket
;
struct inode
*if_freef
; /* free list forward */
struct inode
**if_freeb
; /* free list back */
u_short ic_mode
; /* 0: mode and type of file */
short ic_nlink
; /* 2: number of links to file */
short ic_uid
; /* 4: owner's user id */
short ic_gid
; /* 6: owner's group id */
off_t ic_size
; /* 8: number of bytes in file */
daddr_t ic_db
[NDADDR
]; /* 12: disk block addresses */
daddr_t ic_ib
[NIADDR
]; /* 44: indirect blocks */
time_t ic_atime
; /* 52: time last accessed */
time_t ic_mtime
; /* 56: time last modified */
time_t ic_ctime
; /* 60: time created */
#define i_mode i_ic.ic_mode
#define i_nlink i_ic.ic_nlink
#define i_uid i_ic.ic_uid
#define i_gid i_ic.ic_gid
#define i_size i_ic.ic_size
#define i_atime i_ic.ic_atime
#define i_mtime i_ic.ic_mtime
#define i_ctime i_ic.ic_ctime
#define i_rdev i_ic.ic_db[0]
#define i_lastr i_un.if_lastr
#define i_socket is_socket
#define i_forw i_chain[0]
#define i_back i_chain[1]
#define i_freef i_un.i_fr.if_freef
#define i_freeb i_un.i_fr.if_freeb
#define di_ic di_un.di_icom
#define di_mode di_ic.ic_mode
#define di_nlink di_ic.ic_nlink
#define di_uid di_ic.ic_uid
#define di_gid di_ic.ic_gid
#define di_size di_ic.ic_size
#define di_db di_ic.ic_db
#define di_ib di_ic.ic_ib
#define di_atime di_ic.ic_atime
#define di_mtime di_ic.ic_mtime
#define di_ctime di_ic.ic_ctime
#define di_rdev di_ic.ic_db[0]
extern struct inode
*inode
; /* The inode table itself */
extern struct inode
*inodeNINODE
; /* The end of the inode table */
extern int ninode
; /* number of slots in the table */
struct inode
*rootdir
; /* pointer to inode of root directory */
#define ILOCK 01 /* inode is locked */
#define IUPD 02 /* file has been modified */
#define IACC 04 /* inode access time to be updated */
#define IMOUNT 010 /* inode is mounted on */
#define IWANT 020 /* some process waiting on lock */
#define ITEXT 040 /* inode is pure text prototype */
#define ICHG 0100 /* inode has been changed */
#define IFMT 0170000 /* type of file */
#define IFCHR 0020000 /* character special */
#define IFDIR 0040000 /* directory */
#define IFBLK 0060000 /* block special */
#define IFREG 0100000 /* regular */
#define IFLNK 0120000 /* symbolic link */
#define IFPORTAL 0140000 /* portal */
#define ISUID 04000 /* set user id on execution */
#define ISGID 02000 /* set group id on execution */
#define ISVTX 01000 /* save swapped text even after use */
#define IREAD 0400 /* read, write, execute permissions */