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 8.5 (Berkeley) 07/08/94 13 */ 14 15 #include <ufs/ufs/dinode.h> 16 17 /* 18 * Theoretically, directories can be more than 2Gb in length, however, in 19 * practice this seems unlikely. So, we define the type doff_t as a 32-bit 20 * quantity to keep down the cost of doing lookup on a 32-bit machine. 21 */ 22 #define doff_t int32_t 23 24 /* 25 * The inode is used to describe each active (or recently active) file in the 26 * UFS filesystem. It is composed of two types of information. The first part 27 * is the information that is needed only while the file is active (such as 28 * the identity of the file and linkage to speed its lookup). The second part 29 * is * the permanent meta-data associated with the file which is read in 30 * from the permanent dinode from long term storage when the file becomes 31 * active, and is put back when the file is no longer being used. 32 */ 33 struct inode { 34 struct inode *i_next; /* Hash chain forward. */ 35 struct inode **i_prev; /* Hash chain back. */ 36 struct vnode *i_vnode;/* Vnode associated with this inode. */ 37 struct vnode *i_devvp;/* Vnode for block I/O. */ 38 u_int32_t i_flag; /* flags, see below */ 39 dev_t i_dev; /* Device associated with the inode. */ 40 ino_t i_number; /* The identity of the inode. */ 41 42 union { /* Associated filesystem. */ 43 struct fs *fs; /* FFS */ 44 struct lfs *lfs; /* LFS */ 45 } inode_u; 46 #define i_fs inode_u.fs 47 #define i_lfs inode_u.lfs 48 49 struct dquot *i_dquot[MAXQUOTAS]; /* Dquot structures. */ 50 u_quad_t i_modrev; /* Revision level for NFS lease. */ 51 struct lockf *i_lockf;/* Head of byte-level lock list. */ 52 pid_t i_lockholder; /* DEBUG: holder of inode lock. */ 53 pid_t i_lockwaiter; /* DEBUG: latest blocked for inode lock. */ 54 /* 55 * Side effects; used during directory lookup. 56 */ 57 int32_t i_count; /* Size of free slot in directory. */ 58 doff_t i_endoff; /* End of useful stuff in directory. */ 59 doff_t i_diroff; /* Offset in dir, where we found last entry. */ 60 doff_t i_offset; /* Offset of free space in directory. */ 61 ino_t i_ino; /* Inode number of found directory. */ 62 u_int32_t i_reclen; /* Size of found directory entry. */ 63 /* 64 * The on-disk dinode itself. 65 */ 66 struct dinode i_din; /* 128 bytes of the on-disk dinode. */ 67 }; 68 69 #define i_atime i_din.di_atime 70 #define i_blocks i_din.di_blocks 71 #define i_ctime i_din.di_ctime 72 #define i_db i_din.di_db 73 #define i_flags i_din.di_flags 74 #define i_gen i_din.di_gen 75 #define i_gid i_din.di_gid 76 #define i_ib i_din.di_ib 77 #define i_mode i_din.di_mode 78 #define i_mtime i_din.di_mtime 79 #define i_nlink i_din.di_nlink 80 #define i_rdev i_din.di_rdev 81 #define i_shortlink i_din.di_shortlink 82 #define i_size i_din.di_size 83 #define i_uid i_din.di_uid 84 85 /* These flags are kept in i_flag. */ 86 #define IN_ACCESS 0x0001 /* Access time update request. */ 87 #define IN_CHANGE 0x0002 /* Inode change time update request. */ 88 #define IN_EXLOCK 0x0004 /* File has exclusive lock. */ 89 #define IN_LOCKED 0x0008 /* Inode lock. */ 90 #define IN_LWAIT 0x0010 /* Process waiting on file lock. */ 91 #define IN_MODIFIED 0x0020 /* Inode has been modified. */ 92 #define IN_RENAME 0x0040 /* Inode is being renamed. */ 93 #define IN_SHLOCK 0x0080 /* File has shared lock. */ 94 #define IN_UPDATE 0x0100 /* Modification time update request. */ 95 #define IN_WANTED 0x0200 /* Inode is wanted by a process. */ 96 97 #ifdef KERNEL 98 /* 99 * Structure used to pass around logical block paths generated by 100 * ufs_getlbns and used by truncate and bmap code. 101 */ 102 struct indir { 103 daddr_t in_lbn; /* Logical block number. */ 104 int in_off; /* Offset in buffer. */ 105 int in_exists; /* Flag if the block exists. */ 106 }; 107 108 /* Convert between inode pointers and vnode pointers. */ 109 #define VTOI(vp) ((struct inode *)(vp)->v_data) 110 #define ITOV(ip) ((ip)->i_vnode) 111 112 #define ITIMES(ip, t1, t2) { \ 113 if ((ip)->i_flag & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \ 114 (ip)->i_flag |= IN_MODIFIED; \ 115 if ((ip)->i_flag & IN_ACCESS) \ 116 (ip)->i_atime.ts_sec = (t1)->tv_sec; \ 117 if ((ip)->i_flag & IN_UPDATE) { \ 118 (ip)->i_mtime.ts_sec = (t2)->tv_sec; \ 119 (ip)->i_modrev++; \ 120 } \ 121 if ((ip)->i_flag & IN_CHANGE) \ 122 (ip)->i_ctime.ts_sec = time.tv_sec; \ 123 (ip)->i_flag &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \ 124 } \ 125 } 126 127 /* This overlays the fid structure (see mount.h). */ 128 struct ufid { 129 u_int16_t ufid_len; /* Length of structure. */ 130 u_int16_t ufid_pad; /* Force 32-bit alignment. */ 131 ino_t ufid_ino; /* File number (ino). */ 132 int32_t ufid_gen; /* Generation number. */ 133 }; 134 #endif /* KERNEL */ 135