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/*
* Copyright (c) 1982, 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)inode.h 8.9 (Berkeley) 5/14/95
* $FreeBSD$
*/
#ifndef _SYS_GNU_EXT2FS_INODE_H_
#define _SYS_GNU_EXT2FS_INODE_H_
#include <sys/lock.h>
#include <sys/queue.h>
#define ROOTINO ((ino_t)2)
#define NDADDR 12 /* Direct addresses in inode. */
#define NIADDR 3 /* Indirect addresses in inode. */
/*
* This must agree with the definition in <ufs/ufs/dir.h>.
*/
#define doff_t int32_t
/*
* The inode is used to describe each active (or recently active) file in the
* EXT2FS filesystem. It is composed of two types of information. The first
* part is the information that is needed only while the file is active (such
* as the identity of the file and linkage to speed its lookup). The second
* part is the permanent meta-data associated with the file which is read in
* from the permanent dinode from long term storage when the file becomes
* active, and is put back when the file is no longer being used.
*/
struct inode {
LIST_ENTRY(inode) i_hash;/* Hash chain. */
struct vnode *i_vnode;/* Vnode associated with this inode. */
struct vnode *i_devvp;/* Vnode for block I/O. */
u_int32_t i_flag; /* flags, see below */
dev_t i_dev; /* Device associated with the inode. */
ino_t i_number; /* The identity of the inode. */
struct ext2_sb_info *i_e2fs; /* EXT2FS */
u_quad_t i_modrev; /* Revision level for NFS lease. */
struct lockf *i_lockf;/* Head of byte-level lock list. */
/*
* Side effects; used during directory lookup.
*/
int32_t i_count; /* Size of free slot in directory. */
doff_t i_endoff; /* End of useful stuff in directory. */
doff_t i_diroff; /* Offset in dir, where we found last entry. */
doff_t i_offset; /* Offset of free space in directory. */
ino_t i_ino; /* Inode number of found directory. */
u_int32_t i_reclen; /* Size of found directory entry. */
u_int32_t i_block_group;
u_int32_t i_next_alloc_block;
u_int32_t i_next_alloc_goal;
u_int32_t i_prealloc_block;
u_int32_t i_prealloc_count;
/* Fields from struct dinode in UFS. */
u_int16_t i_mode; /* IFMT, permissions; see below. */
int16_t i_nlink; /* File link count. */
u_int64_t i_size; /* File byte count. */
int32_t i_atime; /* Last access time. */
int32_t i_atimensec; /* Last access time. */
int32_t i_mtime; /* Last modified time. */
int32_t i_mtimensec; /* Last modified time. */
int32_t i_ctime; /* Last inode change time. */
int32_t i_ctimensec; /* Last inode change time. */
int32_t i_db[NDADDR]; /* Direct disk blocks. */
int32_t i_ib[NIADDR]; /* Indirect disk blocks. */
u_int32_t i_flags; /* Status flags (chflags). */
int32_t i_blocks; /* Blocks actually held. */
int32_t i_gen; /* Generation number. */
u_int32_t i_uid; /* File owner. */
u_int32_t i_gid; /* File group. */
};
/*
* The di_db fields may be overlaid with other information for
* file types that do not have associated disk storage. Block
* and character devices overlay the first data block with their
* dev_t value. Short symbolic links place their path in the
* di_db area.
*/
#define i_shortlink i_db
#define i_rdev i_db[0]
#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(int32_t))
/* File permissions. */
#define IEXEC 0000100 /* Executable. */
#define IWRITE 0000200 /* Writeable. */
#define IREAD 0000400 /* Readable. */
#define ISVTX 0001000 /* Sticky bit. */
#define ISGID 0002000 /* Set-gid. */
#define ISUID 0004000 /* Set-uid. */
/* File types. */
#define IFMT 0170000 /* Mask of file type. */
#define IFIFO 0010000 /* Named pipe (fifo). */
#define IFCHR 0020000 /* Character device. */
#define IFDIR 0040000 /* Directory file. */
#define IFBLK 0060000 /* Block device. */
#define IFREG 0100000 /* Regular file. */
#define IFLNK 0120000 /* Symbolic link. */
#define IFSOCK 0140000 /* UNIX domain socket. */
#define IFWHT 0160000 /* Whiteout. */
/* These flags are kept in i_flag. */
#define IN_ACCESS 0x0001 /* Access time update request. */
#define IN_CHANGE 0x0002 /* Inode change time update request. */
#define IN_UPDATE 0x0004 /* Modification time update request. */
#define IN_MODIFIED 0x0008 /* Inode has been modified. */
#define IN_RENAME 0x0010 /* Inode is being renamed. */
#define IN_HASHED 0x0020 /* Inode is on hash list */
#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
#ifdef _KERNEL
/*
* Structure used to pass around logical block paths generated by
* ext2_getlbns and used by truncate and bmap code.
*/
struct indir {
int32_t in_lbn; /* Logical block number. */
int in_off; /* Offset in buffer. */
int in_exists; /* Flag if the block exists. */
};
/* Convert between inode pointers and vnode pointers. */
#define VTOI(vp) ((struct inode *)(vp)->v_data)
#define ITOV(ip) ((ip)->i_vnode)
/* This overlays the fid structure (see mount.h). */
struct ufid {
u_int16_t ufid_len; /* Length of structure. */
u_int16_t ufid_pad; /* Force 32-bit alignment. */
ino_t ufid_ino; /* File number (ino). */
int32_t ufid_gen; /* Generation number. */
};
#endif /* _KERNEL */
#endif /* !_SYS_GNU_EXT2FS_INODE_H_ */
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