lnet/include/lnet/socklnd.h

   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 /*
  27  * This file is part of Lustre, http://www.lustre.org/
  28  *
  29  * lnet/include/lnet/socklnd.h
  30  */
  31 #ifndef __LNET_LNET_SOCKLND_H__
  32 #define __LNET_LNET_SOCKLND_H__
  33
  34 #include <uapi/linux/lnet/lnet-types.h>
  35 #include <uapi/linux/lnet/socklnd.h>
  36
  37 struct ksock_hello_msg {
  38         __u32                   kshm_magic;     /* LNET_PROTO_MAGIC */
  39         __u32                   kshm_version;   /* KSOCK_PROTO_V* */
  40         struct lnet_nid         kshm_src_nid;   /* sender's nid */
  41         struct lnet_nid         kshm_dst_nid;   /* destination nid */
  42         lnet_pid_t              kshm_src_pid;   /* sender's pid */
  43         lnet_pid_t              kshm_dst_pid;   /* destination pid */
  44         __u64                   kshm_src_incarnation; /* sender's incarnation */
  45         __u64                   kshm_dst_incarnation; /* destination's incarnation */
  46         __u32                   kshm_ctype;     /* SOCKLND_CONN_* */
  47         __u32                   kshm_nips;      /* always sent as zero */
  48         __u32                   kshm_ips[0];    /* deprecated */
  49 } __packed;
  50
  51 struct ksock_hello_msg_nid4 {
  52         __u32                   kshm_magic;     /* LNET_PROTO_MAGIC */
  53         __u32                   kshm_version;   /* KSOCK_PROTO_V* */
  54         lnet_nid_t              kshm_src_nid;   /* sender's nid */
  55         lnet_nid_t              kshm_dst_nid;   /* destination nid */
  56         lnet_pid_t              kshm_src_pid;   /* sender's pid */
  57         lnet_pid_t              kshm_dst_pid;   /* destination pid */
  58         __u64                   kshm_src_incarnation; /* sender's incarnation */
  59         __u64                   kshm_dst_incarnation; /* destination's incarnation */
  60         __u32                   kshm_ctype;     /* SOCKLND_CONN_* */
  61         __u32                   kshm_nips;      /* sent as zero */
  62         __u32                   kshm_ips[0];    /* deprecated */
  63 } __packed;
  64
  65 struct ksock_msg_hdr {
  66         __u32                   ksh_type;       /* type of socklnd message */
  67         __u32                   ksh_csum;       /* checksum if != 0 */
  68         __u64                   ksh_zc_cookies[2]; /* Zero-Copy request/ACK
  69                                                     * cookie
  70                                                     */
  71 } __packed;
  72
  73 #define KSOCK_MSG_NOOP          0xc0            /* empty */
  74 #define KSOCK_MSG_LNET          0xc1            /* lnet msg */
  75
  76 struct ksock_msg {
  77         struct ksock_msg_hdr    ksm_kh;
  78         union {
  79                 /* case ksm_kh.ksh_type == KSOCK_MSG_NOOP */
  80                 /* - nothing */
  81                 /* case ksm_kh.ksh_type == KSOCK_MSG_LNET */
  82                 struct lnet_hdr_nid4 lnetmsg_nid4;
  83                 /* case ksm_kh.ksh_type == KSOCK_MSG_LNET &&
  84                  *      kshm_version >= KSOCK_PROTO_V4
  85                  */
  86                 struct lnet_hdr_nid16 lnetmsg_nid16;
  87         } __packed ksm_u;
  88 } __packed;
  89 #define ksm_type ksm_kh.ksh_type
  90 #define ksm_csum ksm_kh.ksh_csum
  91 #define ksm_zc_cookies ksm_kh.ksh_zc_cookies
  92
  93 /* We need to know this number to parse hello msg from ksocklnd in
  94  * other LND (usocklnd, for example) */
  95 #define KSOCK_PROTO_V2          2
  96 #define KSOCK_PROTO_V3          3
  97 #define KSOCK_PROTO_V4          4
  98
  99 #endif