reactos/lib/drivers/oskittcp/include/freebsd/src/sys/sys/file.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1989, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)file.h      8.1 (Berkeley) 6/2/93
  34  */
  35
  36 #ifndef _SYS_FILE_H_
  37 #define _SYS_FILE_H_
  38
  39 #include <sys/fcntl.h>
  40 #include <sys/unistd.h>
  41
  42 #ifdef KERNEL
  43 struct proc;
  44 struct uio;
  45
  46 /*
  47  * Kernel descriptor table.
  48  * One entry for each open kernel vnode and socket.
  49  */
  50 struct file {
  51         struct  file *f_filef;  /* list of active files */
  52         struct  file **f_fileb; /* list of active files */
  53         short   f_flag;         /* see fcntl.h */
  54 #define DTYPE_VNODE     1       /* file */
  55 #define DTYPE_SOCKET    2       /* communications endpoint */
  56         short   f_type;         /* descriptor type */
  57         short   f_count;        /* reference count */
  58         short   f_msgcount;     /* references from message queue */
  59         struct  ucred *f_cred;  /* credentials associated with descriptor */
  60         struct  fileops {
  61                 int     (*fo_read)      __P((struct file *fp, struct uio *uio,
  62                                             struct ucred *cred));
  63                 int     (*fo_write)     __P((struct file *fp, struct uio *uio,
  64                                             struct ucred *cred));
  65                 int     (*fo_ioctl)     __P((struct file *fp, int com,
  66                                             caddr_t data, struct proc *p));
  67                 int     (*fo_select)    __P((struct file *fp, int which,
  68                                             struct proc *p));
  69                 int     (*fo_close)     __P((struct file *fp, struct proc *p));
  70         } *f_ops;
  71         off_t   f_offset;
  72         caddr_t f_data;         /* vnode or socket */
  73 };
  74
  75 extern struct file *filehead;   /* head of list of open files */
  76 extern struct fileops vnops;
  77 extern int maxfiles;            /* kernel limit on number of open files */
  78 extern int maxfilesperproc;     /* per process limit on number of open files */
  79 extern int nfiles;              /* actual number of open files */
  80
  81 #endif /* KERNEL */
  82
  83 #endif