1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
19 *
20 * GPL HEADER END
21 */
22 /*
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
25 *
26 * Copyright (c) 2012 - 2015, Intel Corporation.
27 */
28 /*
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Seagate, Inc.
31 *
32 * lnet/include/lnet/socklnd.h
33 */
34 #ifndef __LNET_LNET_SOCKLND_H__
35 #define __LNET_LNET_SOCKLND_H__
36
37 #include "types.h"
38
39 #define SOCKLND_CONN_NONE (-1)
40 #define SOCKLND_CONN_ANY 0
41 #define SOCKLND_CONN_CONTROL 1
42 #define SOCKLND_CONN_BULK_IN 2
43 #define SOCKLND_CONN_BULK_OUT 3
44 #define SOCKLND_CONN_NTYPES 4
45
46 #define SOCKLND_CONN_ACK SOCKLND_CONN_BULK_IN
47
48 typedef struct {
49 __u32 kshm_magic; /* magic number of socklnd message */
50 __u32 kshm_version; /* version of socklnd message */
51 lnet_nid_t kshm_src_nid; /* sender's nid */
52 lnet_nid_t kshm_dst_nid; /* destination nid */
53 lnet_pid_t kshm_src_pid; /* sender's pid */
54 lnet_pid_t kshm_dst_pid; /* destination pid */
55 __u64 kshm_src_incarnation; /* sender's incarnation */
56 __u64 kshm_dst_incarnation; /* destination's incarnation */
57 __u32 kshm_ctype; /* connection type */
58 __u32 kshm_nips; /* # IP addrs */
59 __u32 kshm_ips[0]; /* IP addrs */
60 } WIRE_ATTR ksock_hello_msg_t;
61
62 typedef struct {
63 lnet_hdr_t ksnm_hdr; /* lnet hdr */
64
65 /*
66 * ksnm_payload is removed because of winnt compiler's limitation:
67 * zero-sized array can only be placed at the tail of [nested]
68 * structure definitions. lnet payload will be stored just after
69 * the body of structure ksock_lnet_msg_t
70 */
71 } WIRE_ATTR ksock_lnet_msg_t;
72
73 typedef struct {
74 __u32 ksm_type; /* type of socklnd message */
75 __u32 ksm_csum; /* checksum if != 0 */
76 __u64 ksm_zc_cookies[2]; /* Zero-Copy request/ACK cookie */
77 union {
78 ksock_lnet_msg_t lnetmsg;/* lnet message, it's empty if
79 * it's NOOP */
80 } WIRE_ATTR ksm_u;
81 } WIRE_ATTR ksock_msg_t;
82
83 static inline void
socklnd_init_msg(ksock_msg_t * msg,int type)84 socklnd_init_msg(ksock_msg_t *msg, int type)
85 {
86 msg->ksm_csum = 0;
87 msg->ksm_type = type;
88 msg->ksm_zc_cookies[0] = msg->ksm_zc_cookies[1] = 0;
89 }
90
91 #define KSOCK_MSG_NOOP 0xC0 /* ksm_u empty */
92 #define KSOCK_MSG_LNET 0xC1 /* lnet msg */
93
94 /* We need to know this number to parse hello msg from ksocklnd in
95 * other LND (usocklnd, for example) */
96 #define KSOCK_PROTO_V2 2
97 #define KSOCK_PROTO_V3 3
98
99 #endif
100