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 */
53
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