| 1 | /* |
| 2 | * Copyright (c) 1982, 1989 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * %sccs.include.redist.c% |
| 6 | * |
| 7 | * @(#)inode.h 7.18 (Berkeley) %G% |
| 8 | */ |
| 9 | |
| 10 | #include <ufs/ufs/dinode.h> |
| 11 | |
| 12 | /* |
| 13 | * The inode is used to describe each active (or recently active) |
| 14 | * file in the UFS filesystem. It is composed of two types of |
| 15 | * information. The first part is the information that is needed |
| 16 | * only while the file is active (such as the identity of the file |
| 17 | * and linkage to speed its lookup). The second part is the |
| 18 | * permannent meta-data associated with the file which is read |
| 19 | * in from the permanent dinode from long term storage when the |
| 20 | * file becomes active, and is put back when the file is no longer |
| 21 | * being used. |
| 22 | */ |
| 23 | struct inode { |
| 24 | struct inode *i_chain[2]; /* hash chain, MUST be first */ |
| 25 | struct vnode *i_vnode; /* vnode associated with this inode */ |
| 26 | struct vnode *i_devvp; /* vnode for block I/O */ |
| 27 | u_long i_flag; /* see below */ |
| 28 | dev_t i_dev; /* device where inode resides */ |
| 29 | ino_t i_number; /* the identity of the inode */ |
| 30 | union { /* associated filesystem */ |
| 31 | struct fs *fs; /* FFS */ |
| 32 | struct lfs *lfs; /* LFS */ |
| 33 | } inode_u; |
| 34 | #define i_fs inode_u.fs |
| 35 | #define i_lfs inode_u.lfs |
| 36 | struct dquot *i_dquot[MAXQUOTAS]; /* pointer to dquot structures */ |
| 37 | struct lockf *i_lockf; /* head of byte-level lock list */ |
| 38 | long i_diroff; /* offset in dir, where we found last entry */ |
| 39 | off_t i_endoff; /* end of useful stuff in directory */ |
| 40 | long i_spare0; |
| 41 | long i_spare1; |
| 42 | struct dinode i_din; /* the on-disk dinode */ |
| 43 | }; |
| 44 | |
| 45 | #define i_mode i_din.di_mode |
| 46 | #define i_nlink i_din.di_nlink |
| 47 | #define i_uid i_din.di_uid |
| 48 | #define i_gid i_din.di_gid |
| 49 | #if BYTE_ORDER == LITTLE_ENDIAN || defined(tahoe) /* ugh! -- must be fixed */ |
| 50 | #define i_size i_din.di_qsize.val[0] |
| 51 | #else /* BYTE_ORDER == BIG_ENDIAN */ |
| 52 | #define i_size i_din.di_qsize.val[1] |
| 53 | #endif |
| 54 | #define i_db i_din.di_db |
| 55 | #define i_ib i_din.di_ib |
| 56 | #define i_atime i_din.di_atime |
| 57 | #define i_mtime i_din.di_mtime |
| 58 | #define i_ctime i_din.di_ctime |
| 59 | #define i_blocks i_din.di_blocks |
| 60 | #define i_rdev i_din.di_db[0] |
| 61 | #define i_flags i_din.di_flags |
| 62 | #define i_gen i_din.di_gen |
| 63 | #define i_forw i_chain[0] |
| 64 | #define i_back i_chain[1] |
| 65 | |
| 66 | /* flags */ |
| 67 | #define ILOCKED 0x0001 /* inode is locked */ |
| 68 | #define IWANT 0x0002 /* some process waiting on lock */ |
| 69 | #define IRENAME 0x0004 /* inode is being renamed */ |
| 70 | #define IUPD 0x0010 /* file has been modified */ |
| 71 | #define IACC 0x0020 /* inode access time to be updated */ |
| 72 | #define ICHG 0x0040 /* inode has been changed */ |
| 73 | #define IMOD 0x0080 /* inode has been modified */ |
| 74 | #define ISHLOCK 0x0100 /* file has shared lock */ |
| 75 | #define IEXLOCK 0x0200 /* file has exclusive lock */ |
| 76 | #define ILWAIT 0x0400 /* someone waiting on file lock */ |
| 77 | |
| 78 | #ifdef KERNEL |
| 79 | /* Convert between inode pointers and vnode pointers. */ |
| 80 | #define VTOI(vp) ((struct inode *)(vp)->v_data) |
| 81 | #define ITOV(ip) ((ip)->i_vnode) |
| 82 | |
| 83 | /* Convert between vnode types and inode formats. */ |
| 84 | extern enum vtype iftovt_tab[]; |
| 85 | extern int vttoif_tab[]; |
| 86 | #define IFTOVT(mode) (iftovt_tab[((mode) & IFMT) >> 12]) |
| 87 | #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) |
| 88 | |
| 89 | #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) |
| 90 | |
| 91 | /* Lock and unlock inodes. */ |
| 92 | #ifdef notdef |
| 93 | #define ILOCK(ip) { \ |
| 94 | while ((ip)->i_flag & ILOCKED) { \ |
| 95 | (ip)->i_flag |= IWANT; \ |
| 96 | (void) sleep((caddr_t)(ip), PINOD); \ |
| 97 | } \ |
| 98 | (ip)->i_flag |= ILOCKED; \ |
| 99 | } |
| 100 | |
| 101 | #define IUNLOCK(ip) { \ |
| 102 | (ip)->i_flag &= ~ILOCKED; \ |
| 103 | if ((ip)->i_flag&IWANT) { \ |
| 104 | (ip)->i_flag &= ~IWANT; \ |
| 105 | wakeup((caddr_t)(ip)); \ |
| 106 | } \ |
| 107 | } |
| 108 | #else |
| 109 | #define ILOCK(ip) ufs_ilock(ip) |
| 110 | #define IUNLOCK(ip) ufs_iunlock(ip) |
| 111 | #endif |
| 112 | |
| 113 | #define ITIMES(ip, t1, t2) { \ |
| 114 | if ((ip)->i_flag&(IUPD|IACC|ICHG)) { \ |
| 115 | (ip)->i_flag |= IMOD; \ |
| 116 | if ((ip)->i_flag&IACC) \ |
| 117 | (ip)->i_atime = (t1)->tv_sec; \ |
| 118 | if ((ip)->i_flag&IUPD) \ |
| 119 | (ip)->i_mtime = (t2)->tv_sec; \ |
| 120 | if ((ip)->i_flag&ICHG) \ |
| 121 | (ip)->i_ctime = time.tv_sec; \ |
| 122 | (ip)->i_flag &= ~(IACC|IUPD|ICHG); \ |
| 123 | } \ |
| 124 | } |
| 125 | |
| 126 | /* This overlays the fid structure (see mount.h). */ |
| 127 | struct ufid { |
| 128 | u_short ufid_len; /* length of structure */ |
| 129 | u_short ufid_pad; /* force long alignment */ |
| 130 | ino_t ufid_ino; /* file number (ino) */ |
| 131 | long ufid_gen; /* generation number */ |
| 132 | }; |
| 133 | #endif /* KERNEL */ |