minix/servers/vfs/vnode.h

   1 #ifndef __VFS_VNODE_H__
   2 #define __VFS_VNODE_H__
   3
   4 EXTERN struct vnode {
   5   endpoint_t v_fs_e;            /* FS process' endpoint number */
   6   endpoint_t v_mapfs_e;         /* mapped FS process' endpoint number */
   7   ino_t v_inode_nr;             /* inode number on its (minor) device */
   8   ino_t v_mapinode_nr;          /* mapped inode number of mapped FS. */
   9   mode_t v_mode;                /* file type, protection, etc. */
  10   uid_t v_uid;                  /* uid of inode. */
  11   gid_t v_gid;                  /* gid of inode. */
  12   off_t v_size;                 /* current file size in bytes */
  13   int v_ref_count;              /* # times vnode used; 0 means slot is free */
  14   int v_fs_count;               /* # reference at the underlying FS */
  15   int v_mapfs_count;            /* # reference at the underlying mapped FS */
  16   endpoint_t v_bfs_e;           /* endpoint number for the FS proces in case
  17                                    of a block special file */
  18   dev_t v_dev;                  /* device number on which the corresponding
  19                                    inode resides */
  20   dev_t v_sdev;                 /* device number for special files */
  21   struct vmnt *v_vmnt;          /* vmnt object of the partition */
  22   tll_t v_lock;                 /* three-level-lock */
  23 } vnode[NR_VNODES];
  24
  25 /* vnode lock types mapping */
  26 #define VNODE_NONE TLL_NONE     /* used only for get_filp2 to avoid locking */
  27 #define VNODE_READ TLL_READ
  28 #define VNODE_OPCL TLL_READSER
  29 #define VNODE_WRITE TLL_WRITE
  30 #endif