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Diffstat (limited to 'sys/gnu/ext2fs/inode.h')
| -rw-r--r-- | sys/gnu/ext2fs/inode.h | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/sys/gnu/ext2fs/inode.h b/sys/gnu/ext2fs/inode.h new file mode 100644 index 0000000..df15596 --- /dev/null +++ b/sys/gnu/ext2fs/inode.h @@ -0,0 +1,162 @@ +/* + * 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. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 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 8.4 (Berkeley) 1/21/94 + */ + +#include <ufs/ufs/dinode.h> + +/* + * Theoretically, directories can be more than 2Gb in length, however, in + * practice this seems unlikely. So, we define the type doff_t as a long + * to keep down the cost of doing lookup on a 32-bit machine. If you are + * porting to a 64-bit architecture, you should make doff_t the same as off_t. + */ +#define doff_t long + +/* + * The inode is used to describe each active (or recently active) + * file in the UFS 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 + * permannent 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 { + struct inode *i_next; /* Hash chain forward. */ + struct inode **i_prev; /* Hash chain back. */ + struct vnode *i_vnode; /* Vnode associated with this inode. */ + struct vnode *i_devvp; /* Vnode for block I/O. */ + u_long i_flag; /* I* flags. */ + dev_t i_dev; /* Device associated with the inode. */ + ino_t i_number; /* The identity of the inode. */ + union { /* Associated filesystem. */ + struct fs *fs; /* FFS */ + struct lfs *lfs; /* LFS */ + } inode_u; +#define i_fs inode_u.fs +#define i_lfs inode_u.lfs + struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */ + u_quad_t i_modrev; /* Revision level for lease. */ + struct lockf *i_lockf; /* Head of byte-level lock list. */ + pid_t i_lockholder; /* DEBUG: holder of inode lock. */ + pid_t i_lockwaiter; /* DEBUG: latest blocked for inode lock. */ + /* + * Side effects; used during directory lookup. + */ + long 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_long i_reclen; /* Size of found directory entry. */ + long i_spare[11]; /* Spares to round up to 128 bytes. */ + /* + * The on-disk dinode itself. + */ + struct dinode i_din; /* 128 bytes of the on-disk dinode. */ +}; + +#define i_atime i_din.di_atime +#define i_blocks i_din.di_blocks +#define i_ctime i_din.di_ctime +#define i_db i_din.di_db +#define i_flags i_din.di_flags +#define i_gen i_din.di_gen +#define i_gid i_din.di_gid +#define i_ib i_din.di_ib +#define i_mode i_din.di_mode +#define i_mtime i_din.di_mtime +#define i_nlink i_din.di_nlink +#define i_rdev i_din.di_rdev +#define i_shortlink i_din.di_shortlink +#define i_size i_din.di_size +#define i_uid i_din.di_uid + +/* 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_EXLOCK 0x0004 /* File has exclusive lock. */ +#define IN_LOCKED 0x0008 /* Inode lock. */ +#define IN_LWAIT 0x0010 /* Process waiting on file lock. */ +#define IN_MODIFIED 0x0020 /* Inode has been modified. */ +#define IN_RENAME 0x0040 /* Inode is being renamed. */ +#define IN_SHLOCK 0x0080 /* File has shared lock. */ +#define IN_UPDATE 0x0100 /* Modification time update request. */ +#define IN_WANTED 0x0200 /* Inode is wanted by a process. */ + +#ifdef KERNEL +/* + * Structure used to pass around logical block paths generated by + * ufs_getlbns and used by truncate and bmap code. + */ +struct indir { + daddr_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) + +#define ITIMES(ip, t1, t2) { \ + if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \ + (ip)->i_flag |= IN_MODIFIED; \ + if ((ip)->i_flag & IN_ACCESS) \ + (ip)->i_atime.ts_sec = (t1)->tv_sec; \ + if ((ip)->i_flag & IN_UPDATE) { \ + (ip)->i_mtime.ts_sec = (t2)->tv_sec; \ + (ip)->i_modrev++; \ + } \ + if ((ip)->i_flag & IN_CHANGE) \ + (ip)->i_ctime.ts_sec = time.tv_sec; \ + (ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \ + } \ +} + +/* This overlays the fid structure (see mount.h). */ +struct ufid { + u_short ufid_len; /* Length of structure. */ + u_short ufid_pad; /* Force long alignment. */ + ino_t ufid_ino; /* File number (ino). */ + long ufid_gen; /* Generation number. */ +}; +#endif /* KERNEL */ |
