cf6b7c4adc
structures etc. to ext2fs-specific names, and remove ufs-specific code that is no longer required. As a first stage, the code will still convert back and forth between the on-disk format and struct inode, so the struct dinode fields have been added to struct inode for now. Note that these files are not yet connected to the build.
178 lines
7.1 KiB
C
178 lines
7.1 KiB
C
/*
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* Copyright (c) 1982, 1989, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)inode.h 8.9 (Berkeley) 5/14/95
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* $FreeBSD$
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*/
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#ifndef _SYS_GNU_EXT2FS_INODE_H_
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#define _SYS_GNU_EXT2FS_INODE_H_
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#include <sys/lock.h>
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#include <sys/queue.h>
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#define ROOTINO ((ino_t)2)
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#define NDADDR 12 /* Direct addresses in inode. */
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#define NIADDR 3 /* Indirect addresses in inode. */
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/*
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* This must agree with the definition in <ufs/ufs/dir.h>.
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*/
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#define doff_t int32_t
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/*
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* The inode is used to describe each active (or recently active) file in the
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* EXT2FS filesystem. It is composed of two types of information. The first
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* part is the information that is needed only while the file is active (such
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* as the identity of the file and linkage to speed its lookup). The second
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* part is the permanent meta-data associated with the file which is read in
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* from the permanent dinode from long term storage when the file becomes
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* active, and is put back when the file is no longer being used.
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*/
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struct inode {
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LIST_ENTRY(inode) i_hash;/* Hash chain. */
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struct vnode *i_vnode;/* Vnode associated with this inode. */
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struct vnode *i_devvp;/* Vnode for block I/O. */
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u_int32_t i_flag; /* flags, see below */
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dev_t i_dev; /* Device associated with the inode. */
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ino_t i_number; /* The identity of the inode. */
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struct ext2_sb_info *i_e2fs; /* EXT2FS */
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u_quad_t i_modrev; /* Revision level for NFS lease. */
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struct lockf *i_lockf;/* Head of byte-level lock list. */
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/*
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* Side effects; used during directory lookup.
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*/
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int32_t i_count; /* Size of free slot in directory. */
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doff_t i_endoff; /* End of useful stuff in directory. */
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doff_t i_diroff; /* Offset in dir, where we found last entry. */
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doff_t i_offset; /* Offset of free space in directory. */
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ino_t i_ino; /* Inode number of found directory. */
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u_int32_t i_reclen; /* Size of found directory entry. */
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u_int32_t i_block_group;
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u_int32_t i_next_alloc_block;
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u_int32_t i_next_alloc_goal;
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u_int32_t i_prealloc_block;
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u_int32_t i_prealloc_count;
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/* Fields from struct dinode in UFS. */
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u_int16_t i_mode; /* IFMT, permissions; see below. */
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int16_t i_nlink; /* File link count. */
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u_int64_t i_size; /* File byte count. */
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int32_t i_atime; /* Last access time. */
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int32_t i_atimensec; /* Last access time. */
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int32_t i_mtime; /* Last modified time. */
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int32_t i_mtimensec; /* Last modified time. */
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int32_t i_ctime; /* Last inode change time. */
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int32_t i_ctimensec; /* Last inode change time. */
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daddr_t i_db[NDADDR]; /* Direct disk blocks. */
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daddr_t i_ib[NIADDR]; /* Indirect disk blocks. */
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u_int32_t i_flags; /* Status flags (chflags). */
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int32_t i_blocks; /* Blocks actually held. */
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int32_t i_gen; /* Generation number. */
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u_int32_t i_uid; /* File owner. */
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u_int32_t i_gid; /* File group. */
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};
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/*
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* The di_db fields may be overlaid with other information for
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* file types that do not have associated disk storage. Block
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* and character devices overlay the first data block with their
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* dev_t value. Short symbolic links place their path in the
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* di_db area.
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*/
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#define i_shortlink i_db
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#define i_rdev i_db[0]
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#define MAXSYMLINKLEN ((NDADDR + NIADDR) * sizeof(daddr_t))
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/* File permissions. */
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#define IEXEC 0000100 /* Executable. */
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#define IWRITE 0000200 /* Writeable. */
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#define IREAD 0000400 /* Readable. */
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#define ISVTX 0001000 /* Sticky bit. */
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#define ISGID 0002000 /* Set-gid. */
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#define ISUID 0004000 /* Set-uid. */
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/* File types. */
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#define IFMT 0170000 /* Mask of file type. */
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#define IFIFO 0010000 /* Named pipe (fifo). */
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#define IFCHR 0020000 /* Character device. */
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#define IFDIR 0040000 /* Directory file. */
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#define IFBLK 0060000 /* Block device. */
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#define IFREG 0100000 /* Regular file. */
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#define IFLNK 0120000 /* Symbolic link. */
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#define IFSOCK 0140000 /* UNIX domain socket. */
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#define IFWHT 0160000 /* Whiteout. */
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/* These flags are kept in i_flag. */
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#define IN_ACCESS 0x0001 /* Access time update request. */
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#define IN_CHANGE 0x0002 /* Inode change time update request. */
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#define IN_UPDATE 0x0004 /* Modification time update request. */
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#define IN_MODIFIED 0x0008 /* Inode has been modified. */
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#define IN_RENAME 0x0010 /* Inode is being renamed. */
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#define IN_HASHED 0x0020 /* Inode is on hash list */
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#define IN_LAZYMOD 0x0040 /* Modified, but don't write yet. */
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#define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */
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#ifdef _KERNEL
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/*
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* Structure used to pass around logical block paths generated by
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* ufs_getlbns and used by truncate and bmap code.
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*/
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struct indir {
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daddr_t in_lbn; /* Logical block number. */
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int in_off; /* Offset in buffer. */
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int in_exists; /* Flag if the block exists. */
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};
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/* Convert between inode pointers and vnode pointers. */
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#define VTOI(vp) ((struct inode *)(vp)->v_data)
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#define ITOV(ip) ((ip)->i_vnode)
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/* This overlays the fid structure (see mount.h). */
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struct ufid {
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u_int16_t ufid_len; /* Length of structure. */
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u_int16_t ufid_pad; /* Force 32-bit alignment. */
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ino_t ufid_ino; /* File number (ino). */
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int32_t ufid_gen; /* Generation number. */
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};
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#endif /* _KERNEL */
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#endif /* !_SYS_GNU_EXT2FS_INODE_H_ */
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