include/uapi/linux/if_fc.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /*
   3  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4  *              operating system.  INET is implemented using the  BSD Socket
   5  *              interface as the means of communication with the user level.
   6  *
   7  *              Global definitions for Fibre Channel.
   8  *
   9  * Version:     @(#)if_fc.h     0.0     11/20/98
  10  *
  11  * Author:      Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *              Donald Becker, <becker@super.org>
  13  *    Peter De Schrijver, <stud11@cc4.kuleuven.ac.be>
  14  *        Vineet Abraham, <vma@iol.unh.edu>
  15  *
  16  *              This program is free software; you can redistribute it and/or
  17  *              modify it under the terms of the GNU General Public License
  18  *              as published by the Free Software Foundation; either version
  19  *              2 of the License, or (at your option) any later version.
  20  */
  21 #ifndef _LINUX_IF_FC_H
  22 #define _LINUX_IF_FC_H
  23
  24 #include <linux/types.h>
  25
  26 #define FC_ALEN 6               /* Octets in one ethernet addr   */
  27 #define FC_HLEN   (sizeof(struct fch_hdr)+sizeof(struct fcllc))
  28 #define FC_ID_LEN 3             /* Octets in a Fibre Channel Address */
  29
  30 /* LLC and SNAP constants */
  31 #define EXTENDED_SAP 0xAA
  32 #define UI_CMD       0x03
  33
  34 /* This is NOT the Fibre Channel frame header. The FC frame header is
  35  *  constructed in the driver as the Tachyon needs certain fields in
  36  *  certains positions. So, it can't be generalized here.*/
  37
  38 struct fch_hdr {
  39         __u8  daddr[FC_ALEN];           /* destination address */
  40         __u8  saddr[FC_ALEN];           /* source address */
  41 };
  42
  43 /* This is a Fibre Channel LLC structure */
  44 struct fcllc {
  45         __u8  dsap;                     /* destination SAP */
  46         __u8  ssap;                     /* source SAP */
  47         __u8  llc;                      /* LLC control field */
  48         __u8  protid[3];                /* protocol id */
  49         __be16 ethertype;               /* ether type field */
  50 };
  51
  52 #endif  /* _LINUX_IF_FC_H */