Return to inode.h CVS log

Up to [Research Unix] / researchv8dc / sys / h

Annotation of researchv8dc/sys/h/inode.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * The I node is the focus of all
                      3:  * file activity in unix. There is a unique
                      4:  * inode allocated for each active file,
                      5:  * each current directory, each mounted-on
                      6:  * file, text file, and the root. An inode is 'named'
                      7:  * by its dev/inumber pair. (iget/iget.c)
                      8:  * Data, from mode on, is read in
                      9:  * from permanent inode on volume.
                     10:  */
                     11: 
                     12: #define        NADDR   13
                     13: 
                     14: struct inode
                     15: {
                     16:        short   i_flag;
                     17:        u_char  i_count;        /* reference count */
                     18:        char    i_fstyp;        /* type of its filesystem */
                     19:        dev_t   i_dev;          /* device where inode resides */
                     20:        long    i_number;       /* i number, 1-to-1 with device address */
                     21:        unsigned short i_mode;
                     22:        short   i_nlink;        /* directory entries */
                     23:        short   i_uid;          /* owner */
                     24:        short   i_gid;          /* group of owner */
                     25:        off_t   i_size;         /* size of file */
                     26:        struct  stdata *i_sptr; /* stream associated with this inode */
                     27:        union {
                     28:                struct {
                     29:                        daddr_t I_addr[NADDR];  /* if normal file/directory */
                     30:                        daddr_t I_lastr;        /* last read (for read-ahead) */
                     31:                } i_f;
                     32: #define        i_addr  i_f.I_addr
                     33: #define        i_lastr i_f.I_lastr
                     34:                struct {
                     35:                        daddr_t I_rdev;         /* i_addr[0] */
                     36:                        long    I_key;          /* see istread */
                     37:                } i_d;
                     38: #define        i_rdev  i_d.I_rdev
                     39: #define i_key  i_d.I_key
                     40:                struct {
                     41:                        long I_tag;
                     42:                        struct inode *I_cip;    /* communications */
                     43:                } i_a;          /* when i_fstyp != 0 */
                     44: #define i_tag  i_a.I_tag
                     45: #define i_cip  i_a.I_cip
                     46:                struct {
                     47:                        struct proc *I_proc;    /* sanity checking */
                     48:                        int         I_sigmask;  /* signal trace mask */
                     49:                } i_p;
                     50: #define i_proc i_p.I_proc
                     51: #define i_sigmask      i_p.I_sigmask
                     52:        } i_un;
                     53:        short   i_hlink;        /* link in hash chain (iget/iput/ifind) */
                     54: };
                     55: 
                     56: #ifdef KERNEL
                     57: struct inode *inode, *inodeNINODE;
                     58: int    ninode;
                     59: 
                     60: struct inode *rootdir;         /* pointer to inode of root directory */
                     61: 
                     62: struct inode *ialloc();
                     63: struct inode *ifind();
                     64: struct inode *iget();
                     65: struct inode *owner();
                     66: struct inode *maknode();
                     67: struct inode *namei();
                     68: struct inode *openi();
                     69: #endif
                     70: 
                     71: /* flags */
                     72: #define        ILOCK   01              /* inode is locked */
                     73: #define        IUPD    02              /* file has been modified */
                     74: #define        IACC    04              /* inode access time to be updated */
                     75: #define        IMOUNT  010             /* inode is mounted on */
                     76: #define        IWANT   020             /* some process waiting on lock */
                     77: #define        ITEXT   040             /* inode is pure text prototype */
                     78: #define        ICHG    0100            /* inode has been changed */
                     79: #define        IPIPE   0200            /* inode is a pipe */
                     80: #define IDEAD  0400            /* only iput and iget */
                     81: #define        IALOCK  01000           /* advisory lock has been set */
                     82: 
                     83: /* modes */
                     84: #define        IFMT    0170000         /* type of file */
                     85: #define                IFDIR   0040000 /* directory */
                     86: #define                IFCHR   0020000 /* character special */
                     87: #define                IFBLK   0060000 /* block special */
                     88: #define                IFREG   0100000 /* regular */
                     89: #define                IFLNK   0120000 /* symbolic link to another file */
                     90: #define        ISUID   04000           /* set user id on execution */
                     91: #define        ISGID   02000           /* set group id on execution */
                     92: #define        ISVTX   01000           /* save swapped text even after use */
                     93: #define        IREAD   0400            /* read, write, execute permissions */
                     94: #define        IWRITE  0200
                     95: #define        IEXEC   0100
                     96: 
                     97: struct argnamei {      /* namei's flag argument */
                     98:        short flag;     /* type of request */
                     99:        ino_t ino;      /* ino and dev for linking */
                    100:        dev_t idev;
                    101:        short mode;     /* mode for creating */
                    102: };
                    103: #define NI_DEL 1       /* unlink this file */
                    104: #define NI_CREAT 2     /* create it if it doesn't exits */
                    105: #define NI_NXCREAT 3   /* create it, error if it already exists */
                    106: #define NI_LINK        4       /* make a link */
                    107: #define NI_MKDIR 5     /* make a directory */
                    108: #define NI_RMDIR 6     /* remove a directory */
                    109: struct nx {    /* arg to real nami */
                    110:        struct inode *dp;
                    111:        char *cp;
                    112:        struct buf *nbp;
                    113:        int nlink;
                    114: };

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.