Inode - Revision history

Pbug: metadata

2008-06-01T13:34:16Z

metadata

← Older revision		Revision as of 06:34, 1 June 2008
Line 1:		Line 1:
	The inode is the node of the index of files on a [[filesystem]]. In UFS1 the inode size is 128 bytes, and in UFS2 it is 256 bytes. The inode contains the following fields (from ''/usr/include/ufs/ufs/dinode.h''):		The inode is the node of the index of files on a [[filesystem]]. In UFS1 the inode size is 128 bytes, and in UFS2 it is 256 bytes. The inode is what's considered to be filesystem metadata, it points to real data of a file.


			The inode contains the following fields (from ''/usr/include/ufs/ufs/dinode.h''):

	struct ufs1_dinode {		struct ufs1_dinode {

Pbug at 10:31, 28 October 2005

2005-10-28T10:31:17Z

← Older revision		Revision as of 03:31, 28 October 2005
Line 1:		Line 1:
	The inode is the node of the index of files on a filesystem. In UFS1 the inode size is 128 bytes, and in UFS2 it is 256 bytes. The inode contains the following fields (from ''/usr/include/ufs/ufs/dinode.h'':		The inode is the node of the index of files on a [[filesystem]]. In UFS1 the inode size is 128 bytes, and in UFS2 it is 256 bytes. The inode contains the following fields (from ''/usr/include/ufs/ufs/dinode.h''):

	struct ufs1_dinode {		struct ufs1_dinode {

Pbug at 10:30, 28 October 2005

2005-10-28T10:30:29Z

New page

The inode is the node of the index of files on a filesystem. In UFS1 the inode size is 128 bytes, and in UFS2 it is 256 bytes. The inode contains the following fields (from ''/usr/include/ufs/ufs/dinode.h'':

struct ufs1_dinode {
u_int16_t di_mode; /* 0: IFMT, permissions; see below. */
int16_t di_nlink; /* 2: File link count. */
union {
u_int16_t oldids[2]; /* 4: Ffs: old user and group ids. */
u_int32_t inumber; /* 4: Lfs: inode number. */
} di_u;
u_int64_t di_size; /* 8: File byte count. */
int32_t di_atime; /* 16: Last access time. */
int32_t di_atimensec; /* 20: Last access time. */
int32_t di_mtime; /* 24: Last modified time. */
int32_t di_mtimensec; /* 28: Last modified time. */
int32_t di_ctime; /* 32: Last inode change time. */
int32_t di_ctimensec; /* 36: Last inode change time. */
ufs1_daddr_t di_db[NDADDR]; /* 40: Direct disk blocks. */
ufs1_daddr_t di_ib[NIADDR]; /* 88: Indirect disk blocks. */
u_int32_t di_flags; /* 100: Status flags (chflags). */
int32_t di_blocks; /* 104: Blocks actually held. */
int32_t di_gen; /* 108: Generation number. */
u_int32_t di_uid; /* 112: File owner. */
u_int32_t di_gid; /* 116: File group. */
int32_t di_spare[2]; /* 120: Reserved; currently unused */
};

For further reading see [[permissions]], [[atime]], [[mtime]], [[ctime]].