1 /* 2 * Copyright (c) 1982, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * %sccs.include.redist.c% 11 * 12 * @(#)inode.h 8.9 (Berkeley) 05/14/95 13 */ 14 15 #include <ufs/ufs/dir.h> 16 #include <ufs/ufs/dinode.h> 17 18 /* 19 * The inode is used to describe each active (or recently active) file in the 20 * UFS filesystem. It is composed of two types of information. The first part 21 * is the information that is needed only while the file is active (such as 22 * the identity of the file and linkage to speed its lookup). The second part 23 * is * the permanent meta-data associated with the file which is read in 24 * from the permanent dinode from long term storage when the file becomes 25 * active, and is put back when the file is no longer being used. 26 */ 27 struct inode { 28 LIST_ENTRY(inode) i_hash;/* Hash chain. */ 29 struct vnode *i_vnode;/* Vnode associated with this inode. */ 30 struct vnode *i_devvp;/* Vnode for block I/O. */ 31 u_int32_t i_flag; /* flags, see below */ 32 dev_t i_dev; /* Device associated with the inode. */ 33 ino_t i_number; /* The identity of the inode. */ 34 35 union { /* Associated filesystem. */ 36 struct fs *fs; /* FFS */ 37 struct lfs *lfs; /* LFS */ 38 } inode_u; 39 #define i_fs inode_u.fs 40 #define i_lfs inode_u.lfs 41 42 struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */ 43 u_quad_t i_modrev; /* Revision level for NFS lease. */ 44 struct lockf *i_lockf;/* Head of byte-level lock list. */ 45 struct lock i_lock; /* Inode lock. */ 46 /* 47 * Side effects; used during directory lookup. 48 */ 49 int32_t i_count; /* Size of free slot in directory. */ 50 doff_t i_endoff; /* End of useful stuff in directory. */ 51 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 52 doff_t i_offset; /* Offset of free space in directory. */ 53 ino_t i_ino; /* Inode number of found directory. */ 54 u_int32_t i_reclen; /* Size of found directory entry. */ 55 /* 56 * The on-disk dinode itself. 57 */ 58 struct dinode i_din; /* 128 bytes of the on-disk dinode. */ 59 }; 60 61 #define i_atime i_din.di_atime 62 #define i_atimensec i_din.di_atimensec 63 #define i_blocks i_din.di_blocks 64 #define i_ctime i_din.di_ctime 65 #define i_ctimensec i_din.di_ctimensec 66 #define i_db i_din.di_db 67 #define i_flags i_din.di_flags 68 #define i_gen i_din.di_gen 69 #define i_gid i_din.di_gid 70 #define i_ib i_din.di_ib 71 #define i_mode i_din.di_mode 72 #define i_mtime i_din.di_mtime 73 #define i_mtimensec i_din.di_mtimensec 74 #define i_nlink i_din.di_nlink 75 #define i_rdev i_din.di_rdev 76 #define i_shortlink i_din.di_shortlink 77 #define i_size i_din.di_size 78 #define i_uid i_din.di_uid 79 80 /* These flags are kept in i_flag. */ 81 #define IN_ACCESS 0x0001 /* Access time update request. */ 82 #define IN_CHANGE 0x0002 /* Inode change time update request. */ 83 #define IN_UPDATE 0x0004 /* Modification time update request. */ 84 #define IN_MODIFIED 0x0008 /* Inode has been modified. */ 85 #define IN_RENAME 0x0010 /* Inode is being renamed. */ 86 #define IN_SHLOCK 0x0020 /* File has shared lock. */ 87 #define IN_EXLOCK 0x0040 /* File has exclusive lock. */ 88 89 #ifdef KERNEL 90 /* 91 * Structure used to pass around logical block paths generated by 92 * ufs_getlbns and used by truncate and bmap code. 93 */ 94 struct indir { 95 ufs_daddr_t in_lbn; /* Logical block number. */ 96 int in_off; /* Offset in buffer. */ 97 int in_exists; /* Flag if the block exists. */ 98 }; 99 100 /* Convert between inode pointers and vnode pointers. */ 101 #define VTOI(vp) ((struct inode *)(vp)->v_data) 102 #define ITOV(ip) ((ip)->i_vnode) 103 104 #define ITIMES(ip, t1, t2) { \ 105 if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \ 106 (ip)->i_flag |= IN_MODIFIED; \ 107 if ((ip)->i_flag & IN_ACCESS) \ 108 (ip)->i_atime = (t1)->tv_sec; \ 109 if ((ip)->i_flag & IN_UPDATE) { \ 110 (ip)->i_mtime = (t2)->tv_sec; \ 111 (ip)->i_modrev++; \ 112 } \ 113 if ((ip)->i_flag & IN_CHANGE) \ 114 (ip)->i_ctime = time.tv_sec; \ 115 (ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \ 116 } \ 117 } 118 119 /* This overlays the fid structure (see mount.h). */ 120 struct ufid { 121 u_int16_t ufid_len; /* Length of structure. */ 122 u_int16_t ufid_pad; /* Force 32-bit alignment. */ 123 ino_t ufid_ino; /* File number (ino). */ 124 int32_t ufid_gen; /* Generation number. */ 125 }; 126 #endif /* KERNEL */ 127