/* @(#)inode.h 13.5 (RC International) 91/12/06 */ #ifndef _INODE_ #define _INODE_ /* * inode.h -- primary file control block * * The I node is the focus of all 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 volume/inumber pair. (iget/iget.c) * Data in icommon is read in from permanent inode on volume. * * Not all fields are valid in connection inodes. The following are * and copied from the original: i_flag (some fields), i_number, i_UID * i_type, i_timevalid, i_rawdev, i_uid, i_gid, i_mode. The following * are valid ONLY in connection inodes: i_fsquid, i_sbbid, i_fcbaddr. The * following are valid in the connection inode but are used for its * local management, not copied from the original: i_flag (some fields), * i_count, i_forw, i_last_blkno, i_semlock. All other fileds are invalid. */ #include #include #define NDADDR 8 /* direct addresses in inode */ #define NIADDR 3 /* indirect addresses in inode */ #define IMAGIC 0x544f5247 /* * inode -- in-memory file control block * * access to information in unions is made via "i_xxx" #defines below */ struct inode { struct inode *i_chain[2]; /* must be first */ struct semaphore i_semlock; /* used for inode locking */ u_short i_flag; /* flags (see below) */ u_short i_count; /* reference count */ u_short i_control; /* no of tr mode opened */ u_short i_write; /* no of normal && write mode opened */ u_short i_execute; /* no of execs on this file */ ino_t i_number; /* i number, 1-to-1 with device addr */ struct fx *i_fx; /* file sys associated with inode */ struct dquot *i_dquot; /* quota struct controlling this file */ struct fcb *i_fcbhead; /* list of connnected remote files */ UID_T i_fsuid; /* recoverable fs id */ union /* union of fields not kept when inode is in free list */ { /* if socket: */ struct socket *is_socket; /* if txipc: */ struct solicitation *is_sol; /* head of lonely hearts list */ /* if in free list: */ struct { struct inode *if_freef; /* free list forward */ struct inode **if_freeb; /* free list back */ } i_fr; /* if file or logical volume: */ struct { struct bufhdr *if_wrlist[6]; /* buffers to write (see buflinksonly) */ daddr_t if_last_blkno; /* last accessed */ daddr_t if_last_mapped; /* last look ahead */ short if_wrlistcount; /* # seq. entries */ struct lock *if_lock; /* */ struct lock *if_bytelock; /* */ int if_timevalid; /* validity timestamp */ struct fs_blocks *if_fs_blocks; /* lv and dir types ONLY */ } i_flv; /* if console message device (/dev/console_message): */ struct { UID_T ic_conmsguid; /* Service queue uid */ } i_conmsgr; /* if communication device (tty, etc.): */ struct { UID_T ic_subpuuid; /* subpu service queue uid */ } i_commr; /* if MXIPC file */ struct { struct mxipc_info *im_mxipc; /* pointer to MXIPC info */ u_long im_states; /* states */ long im_bytes; /* # bytes written */ long im_max_bytes; /* max # bytes written */ } i_mx; /* if FIFO file */ struct { struct fifo_info *fi_fifo; /* Pointer to fifo info */ u_short fi_read; /* no read mode opened */ } i_fi; } i_un; union /* union of fields kept until inode is reallocated */ { /* if logical volume: */ struct { struct lv_entry *il_lep; struct log_status *il_log; struct intent_buf_hdr *il_ibhead; /* intent record buf */ struct rwlock *il_dirlock; /* dir lock */ UID_T il_mnt_fsuid; /* uid of mount point */ ino_t il_mnt_ino; /* ino of mount point */ ino_t il_mnt_dotdot; /* dotdot */ struct mxipc_info *il_mxipc_head; /* MXIPC list */ logsn_t il_lsn; /* log seq number */ } ic_lvonly; /* if file: */ struct { struct inode *if_lvp; /* ptr to logical vol inode */ logsn_t if_lsn; /* pre-image log seq number */ } ic_fonly; /* if connection inode */ struct { UID_T ic_fsquid; /* service uid */ u_int ic_sbbid; /* sbbid of file server */ char *ic_fcbaddr; /* address of file connection */ } ic_conly; } i_un2; struct icommon /* information present in memory and on disk */ { u_short ic_mode; /* 0: mode and type of file */ short ic_nlink; /* 2: number of links to file */ short ic_uid; /* 4: owner's user id */ short 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; union { daddr_t ic_db[NDADDR]; /* 40: disk block addresses */ dev_t ic_rdev; /* look at raw devices as a whole */ struct rawdev ic_rawdev; /* raw devices (disk, tape) */ UID_T ic_UIDval; /* that which node points to */ struct rcomm ic_comm; /* communication device */ struct rsubpu ic_subpu; /* subpu */ short ic_unit; /* rlogin: unit (was minor(dev)) */ } ic_un; daddr_t ic_ib[NIADDR]; /* 72: indirect blocks */ long ic_flags; /* 84: status */ long ic_blocks; /* 88: blocks actually held */ UID_T ic_UID; /* 92: unique i.d. */ u_short ic_type; /* 100: real type of file */ u_char ic_ptier; /* 102: tier of primary extent */ u_char ic_stier; /* 103: tier of secondary extents */ long ic_fnct; /* 104: find_name count */ long ic_fwonct; /* 108: find_without_name count */ long ic_fdsct; /* 112: fd service count */ long ic_spare[2]; /* 116: reserved, currently unused */ long ic_magic; /* 124: inode magic */ } i_ic; u_int i_syncresult; /* used to collect errors from async pushes * which accured after last inode sync * (only file and logical vol). */ }; /* * dinode -- inode as it appears on disk * * access to components is done via "di_xxx" #defines below */ struct dinode { union { struct icommon di_icom; /* data (see above) */ char di_size[128]; /* ensure correct total size */ } di_un; }; /* flags */ #define IUPD 0x0002 /* file has been modified */ #define IACC 0x0004 /* inode access time to be updated */ #define IWRT 0x0010 /* inode to be written (no timestamp)*/ #define IXTND 0x0008 /* file has been extended */ #define ITEXT 0x0020 /* inode is pure text prototype */ #define ICHG 0x0040 /* inode has been changed */ #define ISHLOCK 0x0080 /* file has shared lock */ #define IEXLOCK 0x0100 /* file has exclusive lock */ #define ILWAIT 0x0200 /* someone waiting on file lock */ #define IMORECOMING 0x0400 /* last io indicated more to come */ #define ISEQ 0x0800 /* last io seemed to be sequential */ #define IRO 0x1000 /* file not updated since open */ #define ICONNECTION 0x2000 /* this is connection inode */ #define ISETTINGUP 0x4000 /* inode being set up */ #define IAWAITFLUSH 0x8000 /* irele() after dirty */ /* block write(s) */ /* types: stored in ic_type */ #define IFFIFO 0x0001 /* fifo */ #define IFCHR 0x0002 /* character special */ #define IFDIR 0x0004 /* directory */ #define IFBLK 0x0006 /* block special */ #define IFREG 0x0008 /* regular */ #define IFLNK 0x000a /* symbolic link */ #define IFSOCK 0x000c /* socket */ #define IFEXT 0x000f /* extended type (i_mode only) */ /* types added for TX */ #define IFLV 0x0010 /* logical volume (UID-only) */ #define IFFS 0x0011 /* file system mount point */ #define IFIPC 0x0012 /* IPC endpoint */ #define IFDSK 0x0013 /* disk (unbuffered, physical) */ #define IFMT 0x0014 /* mag tape (physical) */ #define IFCOMM 0x0015 /* communication device. */ #define IFLVI 0x0016 /* logical volume (kernel-internal) */ #define IFCONMSG 0x0017 /* console message device */ #define IFSUBPU 0x0018 /* subpu */ #define IFITTY 0x0019 /* indirect tty (for /dev/tty) */ #define IFINVAL 0x001a /* not valid (being set up) */ #define IFERR 0x001b /* error file (/dev/error) */ #define IFNULL 0x001c /* null file (/dev/null) */ #define IFCONS 0x001d /* console */ #define IFPTC 0x001e /* rlogin: controller (/dev/ptyp?) */ #define IFPTS 0x001f /* rlogin: server (/dev/ttyp?) */ #define IFMIPC 0x0020 /* MXIPC endpoint */ /* modes */ #define ISUID 0x0800 /* set user id on execution */ #define IEXECG 0x0008 /* execute permission, group */ #define ISGID 0x0400 /* set group id on execution */ #define ISVTX 0x0200 /* save swapped text even after use */ #define IREAD 0x0100 /* read, write, execute permissions */ #define IWRITE 0x0080 #define IEXEC 0x0040 /* extended modes: in ic_flags */ #define ISECURE 0x0001 /* prohibit ordinary UNIX writes */ #define IHISTORY 0x0002 /* maintain a history of data changes */ #define IUNLOCKBLK 0x0004 /* allow release of block locks in a transaction */ #define IENFMT 0x0008 /* enable byte lock enforcement mode */ /* internal flags: in ic_flags, 16 left-most bits */ #define IVMCACHE 0x10000 /* may have blks cached by vm system */ #define IRAWTYPE 0x40000 /* raw type (if on) */ #define raw_type(ip) ((ip)->i_flags & IRAWTYPE) /* make access to unionized fields easier (?!?) */ #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 */ #define i_size i_ic.ic_size.val[0] #define i_db i_ic.ic_un.ic_db #define i_ib i_ic.ic_ib #define i_atime i_ic.ic_atime #define i_mtime i_ic.ic_mtime #define i_ctime i_ic.ic_ctime #define i_flags i_ic.ic_flags #define i_blocks i_ic.ic_blocks #define i_magic i_ic.ic_magic #define i_rdev i_ic.ic_un.ic_rdev #define i_rawdev i_ic.ic_un.ic_rawdev #define i_UIDval i_ic.ic_un.ic_UIDval #define i_comm i_ic.ic_un.ic_comm #define i_subpu i_ic.ic_un.ic_subpu #define i_unit i_ic.ic_un.ic_unit #define i_lep i_un2.ic_lvonly.il_lep #define i_log i_un2.ic_lvonly.il_log #define i_ibhead i_un2.ic_lvonly.il_ibhead #define i_dirlock i_un2.ic_lvonly.il_dirlock #define i_mnt_fsuid i_un2.ic_lvonly.il_mnt_fsuid #define i_mnt_ino i_un2.ic_lvonly.il_mnt_ino #define i_mnt_dotdot i_un2.ic_lvonly.il_mnt_dotdot #define i_mxipc_head i_un2.ic_lvonly.il_mxipc_head #define i_llsn i_un2.ic_lvonly.il_lsn #define i_mnt i_mnt_ino #define i_lvp i_un2.ic_fonly.if_lvp #define i_lsn i_un2.ic_fonly.if_lsn #define i_fsquid i_un2.ic_conly.ic_fsquid #define i_fcbaddr i_un2.ic_conly.ic_fcbaddr #define i_sbbid i_un2.ic_conly.ic_sbbid #define i_UID i_ic.ic_UID #define i_type i_ic.ic_type #define i_ptier i_ic.ic_ptier #define i_stier i_ic.ic_stier #define i_fnct i_ic.ic_fnct #define i_fwonct i_ic.ic_fwonct #define i_fdsct i_ic.ic_fdsct #define i_last_blkno i_un.i_flv.if_last_blkno #define i_last_mapped i_un.i_flv.if_last_mapped #define i_bytelock i_un.i_flv.if_bytelock #define i_wrlist i_un.i_flv.if_wrlist #define i_wrlistcount i_un.i_flv.if_wrlistcount #define i_lock i_un.i_flv.if_lock #define i_timevalid i_un.i_flv.if_timevalid #define i_fs_blocks i_un.i_flv.if_fs_blocks #define i_socket i_un.is_socket #define i_txpcb i_un.it_txpcb #define i_sol i_un.is_sol #define i_forw i_chain[0] #define i_back i_chain[1] #define i_freef i_un.i_fr.if_freef #define i_freeb i_un.i_fr.if_freeb #define i_subpuuid i_un.i_commr.ic_subpuuid #define i_conmsguid i_un.i_conmsgr.ic_conmsguid #define i_mxipc i_un.i_mx.im_mxipc #define i_mxstates i_un.i_mx.im_states #define i_mxbytes i_un.i_mx.im_bytes #define i_mxmax_bytes i_un.i_mx.im_max_bytes #define i_fifo i_un.i_fi.fi_fifo #define i_read i_un.i_fi.fi_read #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 #define di_size di_ic.ic_size.val[0] #define di_db di_ic.ic_un.ic_db #define di_ib di_ic.ic_ib #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_un.ic_rdev #define di_rawdev di_ic.ic_un.ic_rawdev #define di_comm di_ic.ic_un.ic_comm #define di_subpu di_ic.ic_un.ic_subpu #define di_UIDval di_ic.ic_un.ic_UIDval #define di_ib di_ic.ic_ib #define di_blocks di_ic.ic_blocks #define di_flags di_ic.ic_flags #define di_type di_ic.ic_type #define di_ptier di_ic.ic_ptier #define di_stier di_ic.ic_stier #define di_UID di_ic.ic_UID #define di_fnct di_ic.ic_fnct #define di_fwonct di_ic.ic_fwonct #define di_fdsct di_ic.ic_fdsct #define di_magic di_ic.ic_magic #endif _INODE_