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- /*
- * Mach Operating System
- * Copyright (c) 1987 Carnegie-Mellon University
- * All rights reserved. The CMU software License Agreement specifies
- * the terms and conditions for use and redistribution.
- */
- /*
- * HISTORY
- * 21-Feb-90 Morris Meyer (mmeyer) at NeXT
- * Backed out NFS 4.0 IMARK() macro.
- *
- * 28-Sep-89 Morris Meyer (mmeyer) at NeXT
- * NFS 4.0 Changes.
- *
- * 20-Sep-88 Avadis Tevanian (avie) at NeXT
- * Support fast symbolic links for NeXT too.
- *
- * 18-Nov-87 Avadis Tevanian (avie) at Carnegie-Mellon University
- * Eliminate MACH_VM conditional.
- *
- * 27-Oct-87 Peter King (king) at NeXT
- * SUN_VFS: Added NFS support.
- *
- * 25-May-87 Avadis Tevanian (avie) at Carnegie-Mellon University
- * Use vm_info field regardless of which options are enabled.
- *
- * 22-Jan-87 Michael Young (mwyoung) at Carnegie-Mellon University
- * MACH_XP: Correct type for inode.pager field.
- *
- * 22-Dec-86 David L. Black (dlb) at Carnegie-Mellon University
- * MULTIMAX: support Encore's fast symbolic links.
- *
- * 21-Oct-86 Jonathan J. Chew at Carnegie-Mellon University
- * Use romp definition of "i_size" and "di_size" fields in inode
- * structure with 68000.
- *
- * 14-Oct-86 Avadis Tevanian (avie) at Carnegie-Mellon University
- * Added changes for ns32000 byte ordering (from dlb).
- *
- * 31-May-86 Avadis Tevanian (avie) at CUD9gie-Mellon University
- * Set the pager_id field in the inode structure. This is a back
- * pointer to the real pager id which will allow for pager id's to
- * be different than inode numbers.
- *
- * 25-Jan-86 Avadis Tevanian (avie) at Carnegie-Mellon University
- * Upgraded to 4.3.
- *
- * 18-Feb-86 Bill Bolosky (bolosky) at Carnegie-Mellon University
- * Added different definitions of i_size and di_size for Sailboat
- * from IBM code under switch ROMP. These differences are
- * presumably because of byte ordering differences.
- */
-
- /*
- * Copyright (c) 1982, 1986 Regents of the University of California.
- * All rights reserved. The Berkeley software License Agreement
- * specifies the terms and conditions for redistribution.
- *
- * @(#)inode.h 7.1 (Berkeley) 6/4/86
- */
-
- /* @(#)inode.h 2.2 88/06/20 4.0NFSSRC SMI; from UCB 7.1 6/4/86 */
-
- /*
- * The I node is the focus of all local file activity in UNIX.
- * There is a unique inode allocated for each active file,
- * each current directory, each mounted-on file, text file, and the root.
- * An inode is 'named' by its dev/inumber pair. (iget/iget.c)
- * Data in icommon is read in from permanent inode on volume.
- */
-
- #define NDADDR 12 /* direct addresses in inode */
- #define NIADDR 3 /* indirect addresses in inode */
- #if defined(NeXT) || defined(MULTIMAX)
- #define MAX_FASTLINK_SIZE ((NDADDR + NIADDR) * sizeof (daddr_t))
- #endif defined(NeXT) || defined(MULTIMAX)
-
- struct inode {
- struct inode *i_chain[2]; /* must be first */
- struct inode *inode_list; /* list of all inodes --- could search
- inode hash table to traverse
- instead though */
- struct vnode i_vnode; /* vnode associated with this inode */
- struct vnode *i_devvp; /* vnode for block I/O */
- u_short i_flag;
- dev_t i_dev; /* device where inode resides */
- ino_t i_number; /* i number, 1-to-1 with device address */
- off_t i_diroff; /* offset in dir, where we found last entry */
- struct fs *i_fs; /* file sys associated with this inode */
- struct dquot *i_dquot; /* quota structure controlling this file */
- union {
- daddr_t if_lastr; /* last read (read-ahead) */
- struct socket *is_socket;
- } i_un;
- struct {
- struct inode *if_freef; /* free list forward */
- struct inode **if_freeb; /* free list back */
- } i_fr;
- struct icommon
- {
- u_short ic_mode; /* 0: mode and type of file */
- short ic_nlink; /* 2: UD@er of links to file */
- uid_t ic_uid; /* 4: owner's user id */
- gid_t ic_gid; /* 6: owner's group id */
- quad ic_size; /* 8: number of bytes in file */
- time_t ic_atime; /* 16: time last accessed */
- long ic_atspare;
- time_t ic_mtime; /* 24: time last modified */
- long ic_mtspare;
- time_t ic_ctime; /* 32: last time inode changed */
- long ic_ctspare;
- #if defined(NeXT) || defined(MULTIMAX)
- union {
- struct {
- daddr_t Mb_db[NDADDR]; /* 40: disk block addresses*/
- daddr_t Mb_ib[NIADDR]; /* 88: indirect blocks */
- } ic_Mb;
- #define ic_db ic_Mun.ic_Mb.Mb_db
- #define ic_ib ic_Mun.ic_Mb.Mb_ib
- char ic_Msymlink[MAX_FASTLINK_SIZE];
- /* 40: symbolic link name */
- } ic_Mun;
- #define ic_symlink ic_Mun.ic_Msymlink
- #else defined(NeXT) || defined(MULTIMAX)
- daddr_t ic_db[NDADDR]; /* 40: disk block addresses */
- daddr_t ic_ib[NIADDR]; /* 88: indirect blocks */
- #endif defined(NeXT) || defined(MULTIMAX)
- long ic_flags; /* 100: status, currently unused */
- #if defined(NeXT) || defined(MULTIMAX)
- #define IC_FASTLINK 0x0001 /* Symbolic link in inode */
- #endif defined(NeXT) || defined(MULTIMAX)
- long ic_blocks; /* 104: blocks actually held */
- long ic_gen; /* 108: generation number */
- long ic_spare[4]; /* 112: reserved, currently unused */
- } i_ic;
- uid_t i_ruid; /* cached real uid for user mounts */
- gid_t i_rgid; /* cached real gid for user mounts */
- };
-
- struct dinode {
- union {
- struct icommon di_icom;
- char di_size[128];
- } di_un;
- };
-
- #define i_mode i_ic.ic_mode
- #define i_nlink i_ic.ic_nlink
- #define i_uid i_ic.ic_uid
- #define i_gid i_ic.ic_gid
- /* ugh! -- must be fixed */
- #if defined(vax) || defined(ns32000)
- #define i_size i_ic.ic_size.val[0]
- #endif defined(vax) || defined(ns32000)
- #if defined(romp) || defined(mc68000) || defined(m88k)
- #define i_size i_ic.ic_size.val[1]
- #endif defined(romp) || defined(mc68000) || defined(m88k)
- #define i_db i_ic.ic_db
- #define i_ib i_ic.ic_ib
- #if defined(NeXT) || defined(MULTIMAX)
- #define i_symlink i_ic.ic_symlink
- #define i_icflags i_ic.ic_flags
- #endif defined(NeXT) || defined(MULTIMAX)
- #define i_atime i_ic.ic_atime
- #define i_mtime i_ic.ic_mtime
- #define i_ctime i_ic.ic_ctime
- #define i_blocks i_ic.ic_blocks
- #define i_rdev i_ic.ic_db[0]
- #define i_gen i_ic.ic_gen
- #define i_lastr i_un.if_lastr
- #define i_socket i_un.is_socket
- #define i_fUDA i_chain[0]
- #define i_back i_chain[1]
- #define i_freef i_fr.if_freef
- #define i_freeb i_fr.if_freeb
-
- #define di_ic di_un.di_icom
- #define di_mode di_ic.ic_mode
- #define di_nlink di_ic.ic_nlink
- #define di_uid di_ic.ic_uid
- #define di_gid di_ic.ic_gid
- #if defined(vax) || defined(ns32000)
- #define di_size di_ic.ic_size.val[0]
- #endif defined(vax) || defined(ns32000)
- #if defined(romp) || defined(mc68000) || defined(m88k)
- #define di_size di_ic.ic_size.val[1]
- #endif defined(romp) || defined(mc68000) || defined(m88k)
- #define di_db di_ic.ic_db
- #define di_ib di_ic.ic_ib
- #if defined(NeXT) || defined(MULTIMAX)
- #define di_symlink di_ic.ic_symlink
- #define di_icflags di_ic.ic_flags
- #endif defined(NeXT) || defined(MULTIMAX)
- #define di_atime di_ic.ic_atime
- #define di_mtime di_ic.ic_mtime
- #define di_ctime di_ic.ic_ctime
- #define di_rdev di_ic.ic_db[0]
- #define di_blocks di_ic.ic_blocks
- #define di_gen di_ic.ic_gen
-
- #ifdef KERNEL
- struct inode *inode_list; /* list of all inodes */
-
- extern struct vnodeops ufs_vnodeops; /* vnode operations for ufs */
-
- struct inode *ialloc();
- struct inode *iget();
- ino_t dirpref();
- #endif
-
- /* flags */
- #define ILOCKED 0x001 /* inode is locked */
- #define IUPD 0x002 /* file has been modified */
- #define IACC 0x004 /* inode access time to be updated */
- #define IMOD 0x008 /* inode has been modified */
- #define IWANT 0x010 /* some process waiting on lock */
- #define ICHG 0x040 /* inode has been changed */
- #define ILWAIT 0x080 /* someone waiting on file lock */
- #define IREF 0x100 /* inode is being referenced */
- #if NeXT
- #define IFREE 0x200 /* inode has been free'd */
- #define IRELEASE_TO_ZONE 0x8000
- #endif NeXT
-
- /* modes */
- #define IFMT 0170000 /* type of file */
- #define IFIFO 0010000 /* named pipe (fifo) */
- #define IFCHR 0020000 /* character special */
- #define IFDIR 0040000 /* directory */
- #define IFBLK 0060000 /* block special */
- #define IFREG 0100000 /* regular */
- #define IFLNK 0120000 /* symbolic link */
- #define IFSOCK 0140000 /* socket */
-
- #define ISUID 04000 /* set user id on execution */
- #define ISGID 02000 /* set group id on execution */
- #define ISVTX 01000 /* save swapped text even after use */
- #define IREAD 0400 /* read, write, execute permissions */
- #define IWRITE 0200
- #define IEXEC 0100
-
- #ifdef KERNEL
- /*
- * Convert between inode pointers and vnode pointers
- */
- #define VTOI(VP) ((struct inode *)(VP)->v_data)
- #define ITOV(IP) ((struct vnode *)&(IP)->i_vnode)
-
- /*
- * Convert between vnode types and inode formats
- */
- extern enum vtype iftovt_tab[];
- extern int vttoif_tab[];
- #define IFTOVT(M) (iftovt_tab[((M) & IFMT) >> 13])
- #define VTTOIF(T) (vttoif_tab[(int)(T)])
-
- #define MAKEIMODE(T, M) (VTTOIF(T) | (M))
-
- /*
- * Lock and unlock inodes.
- */
-
- #define ILOCK(ip) { \
- while ((ip)->i_flag & ILOCKED) { \
- (ip)->i_flag |= IWANT; \
- sleep((caddr_t)(ip), PINOD); \
- } \
- (ip)->iUD7g |= ILOCKED; \
- }
-
- #define IUNLOCK(ip) { \
- (ip)->i_flag &= ~ILOCKED; \
- if ((ip)->i_flag&IWANT) { \
- (ip)->i_flag &= ~IWANT; \
- wakeup((caddr_t)(ip)); \
- } \
- }
-
- #define IUPDAT(ip, waitfor) { \
- if (ip->i_flag & (IUPD|IACC|ICHG|IMOD)) \
- iupdat(ip, waitfor); \
- }
-
- /*
- * Mark an inode with the current (unique) timestamp.
- */
- struct timeval iuniqtime;
-
- #ifdef NeXT
- #define IMARK(ip) { \
- microtime(&iuniqtime); \
- if ((ip)->i_flag & IACC) { \
- (ip)->i_atime = iuniqtime.tv_sec; \
- } \
- if ((ip)->i_flag & IUPD) { \
- (ip)->i_mtime = iuniqtime.tv_sec; \
- } \
- if ((ip)->i_flag & ICHG) { \
- ip->i_diroff = 0; \
- (ip)->i_ctime = iuniqtime.tv_sec; \
- } \
- }
- #else
- #define IMARK(ip) { \
- if (time.tv_sec > iuniqtime.tv_sec || \
- time.tv_usec > iuniqtime.tv_usec) { \
- iuniqtime.tv_sec = time.tv_sec; \
- iuniqtime.tv_usec = time.tv_usec; \
- } else { \
- iuniqtime.tv_usec++; \
- } \
- if ((ip)->i_flag & IACC) { \
- (ip)->i_atime = iuniqtime.tv_sec; \
- } \
- if ((ip)->i_flag & IUPD) { \
- (ip)->i_mtime = iuniqtime.tv_sec; \
- } \
- if ((ip)->i_flag & ICHG) { \
- ip->i_diroff = 0; \
- (ip)->i_ctime = iuniqtime.tv_sec; \
- } \
- }
- #endif NeXT
-
- #define ITIMES(ip) { \
- if ((ip)->i_flag & (IUPD|IACC|ICHG)) { \
- (ip)->i_flag |= IMOD; \
- IMARK(ip); \
- (ip)->i_flag &= ~(IACC|IUPD|ICHG); \
- } \
- }
-
- #define ESAME (-1) /* trying to rename linked files (special) */
-
- /*
- * Macros for modifying inode reference counts - used to check for consistency
- * at each reference.
- *
- * The idecr_chk() macro is defined such that it doesn't decrement the
- * reference count when already zero. This is in order to avoid the nested
- * iincr panic which would otherwise occur when update() tries to sync the
- * inode before halting and increments the count back to zero.
- *
- * The panic message strings are initialized variables rather than constant
- * strings since they are potentially used in many places.
- */
- extern char *PANICMSG_IINCR;
- extern char *PANICMSG_IDECR;
-
- #define iincr_chk(ip) { if (++((ip)->i_count) == 0) panic(PANICMSG_IINCR); }
- #define idecr_chk(ip) { if (((ip)->i_count) != 0) ((ip)->i_count--); else panic(PANICMSG_IDECR); }
-
- /*
- * Check that file is owned by current user or user is su.
- */
- #define OWNER(CR, IP) (((CR)->cr_uid == (IP)->i_uid)? 0: (suser()? 0: u.u_error))
- /*
- * enums
- */
- enum de_op { DE_CREATE, DE_LINK, DE_RENAME }UD8 direnter ops */
-
- /*
- * This overlays the fid sturcture (see vfs.h)
- */
- struct ufid {
- u_short ufid_len;
- ino_t ufid_ino;
- long ufid_gen;
- };
- #endif KERNEL
-