1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
/*
* net/tipc/ib_media.c: Infiniband bearer support for TIPC
*
* Copyright (c) 2013 Patrick McHardy <kaber@trash.net>
*
* Based on eth_media.c, which carries the following copyright notice:
*
* Copyright (c) 2001-2007, Ericsson AB
* Copyright (c) 2005-2008, 2011, Wind River Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/if_infiniband.h>
#include "core.h"
#include "bearer.h"
/**
* ib_media_addr_set - initialize Infiniband media address structure
*
* Media-dependent "value" field stores MAC address in first 6 bytes
* and zeroes out the remaining bytes.
*/
static void ib_media_addr_set(const struct tipc_bearer *tb_ptr,
struct tipc_media_addr *a, char *mac)
{
BUILD_BUG_ON(sizeof(a->value) < INFINIBAND_ALEN);
memcpy(a->value, mac, INFINIBAND_ALEN);
a->media_id = TIPC_MEDIA_TYPE_IB;
a->broadcast = !memcmp(mac, tb_ptr->bcast_addr.value, INFINIBAND_ALEN);
}
/**
* send_msg - send a TIPC message out over an InfiniBand interface
*/
static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr,
struct tipc_media_addr *dest)
{
struct sk_buff *clone;
int delta;
struct net_device *dev = tb_ptr->dev;
clone = skb_clone(buf, GFP_ATOMIC);
if (!clone)
return 0;
delta = dev->hard_header_len - skb_headroom(buf);
if ((delta > 0) &&
pskb_expand_head(clone, SKB_DATA_ALIGN(delta), 0, GFP_ATOMIC)) {
kfree_skb(clone);
return 0;
}
skb_reset_network_header(clone);
clone->dev = dev;
clone->protocol = htons(ETH_P_TIPC);
dev_hard_header(clone, dev, ETH_P_TIPC, dest->value,
dev->dev_addr, clone->len);
dev_queue_xmit(clone);
return 0;
}
/**
* enable_media - attach TIPC bearer to an InfiniBand interface
*/
static int enable_media(struct tipc_bearer *tb_ptr)
{
struct net_device *dev;
char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1;
/* Find device with specified name */
dev = dev_get_by_name(&init_net, driver_name);
if (!dev)
return -ENODEV;
/* Associate TIPC bearer with InfiniBand bearer */
tb_ptr->dev = dev;
tb_ptr->usr_handle = NULL;
memset(tb_ptr->bcast_addr.value, 0, sizeof(tb_ptr->bcast_addr.value));
memcpy(tb_ptr->bcast_addr.value, dev->broadcast, INFINIBAND_ALEN);
tb_ptr->bcast_addr.media_id = TIPC_MEDIA_TYPE_IB;
tb_ptr->bcast_addr.broadcast = 1;
tb_ptr->mtu = dev->mtu;
ib_media_addr_set(tb_ptr, &tb_ptr->addr, (char *)dev->dev_addr);
rcu_assign_pointer(dev->tipc_ptr, tb_ptr);
return 0;
}
/**
* disable_media - detach TIPC bearer from an InfiniBand interface
*
* Mark InfiniBand bearer as inactive so that incoming buffers are thrown away,
* then get worker thread to complete bearer cleanup. (Can't do cleanup
* here because cleanup code needs to sleep and caller holds spinlocks.)
*/
static void disable_media(struct tipc_bearer *tb_ptr)
{
RCU_INIT_POINTER(tb_ptr->dev->tipc_ptr, NULL);
dev_put(tb_ptr->dev);
}
/**
* ib_addr2str - convert InfiniBand address to string
*/
static int ib_addr2str(struct tipc_media_addr *a, char *str_buf, int str_size)
{
if (str_size < 60) /* 60 = 19 * strlen("xx:") + strlen("xx\0") */
return 1;
sprintf(str_buf, "%20phC", a->value);
return 0;
}
/**
* ib_addr2msg - convert InfiniBand address format to message header format
*/
static int ib_addr2msg(struct tipc_media_addr *a, char *msg_area)
{
memset(msg_area, 0, TIPC_MEDIA_ADDR_SIZE);
msg_area[TIPC_MEDIA_TYPE_OFFSET] = TIPC_MEDIA_TYPE_IB;
memcpy(msg_area, a->value, INFINIBAND_ALEN);
return 0;
}
/**
* ib_msg2addr - convert message header address format to InfiniBand format
*/
static int ib_msg2addr(const struct tipc_bearer *tb_ptr,
struct tipc_media_addr *a, char *msg_area)
{
ib_media_addr_set(tb_ptr, a, msg_area);
return 0;
}
/*
* InfiniBand media registration info
*/
struct tipc_media ib_media_info = {
.send_msg = send_msg,
.enable_media = enable_media,
.disable_media = disable_media,
.addr2str = ib_addr2str,
.addr2msg = ib_addr2msg,
.msg2addr = ib_msg2addr,
.priority = TIPC_DEF_LINK_PRI,
.tolerance = TIPC_DEF_LINK_TOL,
.window = TIPC_DEF_LINK_WIN,
.type_id = TIPC_MEDIA_TYPE_IB,
.name = "ib"
};
|
