servers/vfs/vnode.h

   1
   2
   3 EXTERN struct vnode {
   4   endpoint_t v_fs_e;            /* FS process' endpoint number */
   5   ino_t v_inode_nr;             /* inode number on its (minor) device */
   6   mode_t v_mode;                /* file type, protection, etc. */
   7   uid_t v_uid;
   8   gid_t v_gid;
   9   off_t v_size;                 /* current file size in bytes */
  10   int v_ref_count;              /* # times vnode used; 0 means slot is free */
  11   int v_fs_count;               /* # reference at the underlying FS */
  12   int v_ref_check;              /* for consistency checks */
  13   char v_pipe;                  /* set to I_PIPE if pipe */
  14   off_t v_pipe_rd_pos;
  15   off_t v_pipe_wr_pos;
  16   endpoint_t v_bfs_e;           /* endpoint number for the FS proces in case
  17                                    of a block special file */
  18
  19   dev_t v_dev;                  /* device number on which the corresponding
  20                                    inode resides */
  21
  22   dev_t v_sdev;                 /* device number for special files */
  23   unsigned short v_index;       /* inode's index in the FS inode table */
  24   struct vmnt *v_vmnt;          /* vmnt object of the partition */
  25
  26   /* For debugging */
  27   char *v_file;
  28   int v_line;
  29 } vnode[NR_VNODES];
  30
  31 #define NIL_VNODE (struct vnode *) 0    /* indicates absence of vnode slot */
  32
  33 /* Field values.  Note that CLEAN and DIRTY are defined in "const.h" */
  34 #define NO_PIPE            0    /* i_pipe is NO_PIPE if inode is not a pipe */
  35 #define I_PIPE             1    /* i_pipe is I_PIPE if inode is a pipe */
  36 #define NO_MOUNT           0    /* i_mount is NO_MOUNT if file not mounted on*/
  37 #define I_MOUNT            1    /* i_mount is I_MOUNT if file mounted on */
  38 #define NO_SEEK            0    /* i_seek = NO_SEEK if last op was not SEEK */
  39 #define ISEEK              1    /* i_seek = ISEEK if last op was SEEK */
  40