/*- * 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 _UFS_UFS_INODE_H_ #define _UFS_UFS_INODE_H_ #include #include #include /* * This must agree with the definition in . */ #define doff_t int32_t /* * 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 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. * * An inode may only be changed while holding either the exclusive * vnode lock or the shared vnode lock and the vnode interlock. We use * the latter only for "read" and "get" operations that require * changing i_flag, or a timestamp. This locking protocol allows executing * those operations without having to upgrade the vnode lock from shared to * exclusive. */ struct inode { TAILQ_ENTRY(inode) i_nextsnap; /* snapshot file list. */ struct vnode *i_vnode;/* Vnode associated with this inode. */ struct ufsmount *i_ump;/* Ufsmount point associated with this inode. */ u_int32_t i_flag; /* flags, see below */ struct cdev *i_dev; /* Device associated with the inode. */ ino_t i_number; /* The identity of the inode. */ int i_effnlink; /* i_nlink when I/O completes */ struct fs *i_fs; /* Associated filesystem superblock. */ struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */ /* * 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. */ union { struct dirhash *dirhash; /* Hashing for large directories. */ daddr_t *snapblklist; /* Collect expunged snapshot blocks. */ } i_un; /* * Data for extended attribute modification. */ u_char *i_ea_area; /* Pointer to malloced copy of EA area */ unsigned i_ea_len; /* Length of i_ea_area */ int i_ea_error; /* First errno in transaction */ int i_ea_refs; /* Number of users of EA area */ /* * Copies from the on-disk dinode itself. */ u_int16_t i_mode; /* IFMT, permissions; see below. */ int16_t i_nlink; /* File link count. */ u_int64_t i_size; /* File byte count. */ u_int32_t i_flags; /* Status flags (chflags). */ int64_t i_gen; /* Generation number. */ u_int32_t i_uid; /* File owner. */ u_int32_t i_gid; /* File group. */ /* * The real copy of the on-disk inode. */ union { struct ufs1_dinode *din1; /* UFS1 on-disk dinode. */ struct ufs2_dinode *din2; /* UFS2 on-disk dinode. */ } dinode_u; }; /* * 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_LAZYMOD 0x0040 /* Modified, but don't write yet. */ #define IN_SPACECOUNTED 0x0080 /* Blocks to be freed in free count. */ #define IN_LAZYACCESS 0x0100 /* Process IN_ACCESS after the suspension finished */ #define IN_EA_LOCKED 0x0200 #define IN_EA_LOCKWAIT 0x0400 #define i_devvp i_ump->um_devvp #define i_umbufobj i_ump->um_bo #define i_dirhash i_un.dirhash #define i_snapblklist i_un.snapblklist #define i_din1 dinode_u.din1 #define i_din2 dinode_u.din2 #ifdef _KERNEL /* * The DIP macro is used to access fields in the dinode that are * not cached in the inode itself. */ #define DIP(ip, field) \ (((ip)->i_ump->um_fstype == UFS1) ? \ (ip)->i_din1->d##field : (ip)->i_din2->d##field) #define DIP_SET(ip, field, val) do { \ if ((ip)->i_ump->um_fstype == UFS1) \ (ip)->i_din1->d##field = (val); \ else \ (ip)->i_din2->d##field = (val); \ } while (0) #define MAXSYMLINKLEN(ip) \ ((ip)->i_ump->um_fstype == UFS1) ? \ ((NDADDR + NIADDR) * sizeof(ufs1_daddr_t)) : \ ((NDADDR + NIADDR) * sizeof(ufs2_daddr_t)) #define SHORTLINK(ip) \ (((ip)->i_ump->um_fstype == UFS1) ? \ (caddr_t)(ip)->i_din1->di_db : (caddr_t)(ip)->i_din2->di_db) /* * Structure used to pass around logical block paths generated by * ufs_getlbns and used by truncate and bmap code. */ struct indir { ufs2_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) /* Determine if soft dependencies are being done */ #define DOINGSOFTDEP(vp) ((vp)->v_mount->mnt_flag & MNT_SOFTDEP) #define DOINGASYNC(vp) ((vp)->v_mount->mnt_kern_flag & MNTK_ASYNC) /* 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 /* !_UFS_UFS_INODE_H_ */