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
|
// SPDX-License-Identifier: GPL-2.0
/*
* Shared Memory Communications over RDMA (SMC-R) and RoCE
*
* smc_sysctl.c: sysctl interface to SMC subsystem.
*
* Copyright (c) 2022, Alibaba Inc.
*
* Author: Tony Lu <tonylu@linux.alibaba.com>
*
*/
#include <linux/init.h>
#include <linux/sysctl.h>
#include <net/net_namespace.h>
#include "smc.h"
#include "smc_core.h"
#include "smc_llc.h"
#include "smc_sysctl.h"
static int min_sndbuf = SMC_BUF_MIN_SIZE;
static int min_rcvbuf = SMC_BUF_MIN_SIZE;
static int max_sndbuf = INT_MAX / 2;
static int max_rcvbuf = INT_MAX / 2;
static const int net_smc_wmem_init = (64 * 1024);
static const int net_smc_rmem_init = (64 * 1024);
static int links_per_lgr_min = SMC_LINKS_ADD_LNK_MIN;
static int links_per_lgr_max = SMC_LINKS_ADD_LNK_MAX;
static int conns_per_lgr_min = SMC_CONN_PER_LGR_MIN;
static int conns_per_lgr_max = SMC_CONN_PER_LGR_MAX;
static struct ctl_table smc_table[] = {
{
.procname = "autocorking_size",
.data = &init_net.smc.sysctl_autocorking_size,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_douintvec,
},
{
.procname = "smcr_buf_type",
.data = &init_net.smc.sysctl_smcr_buf_type,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_douintvec_minmax,
.extra1 = SYSCTL_ZERO,
.extra2 = SYSCTL_TWO,
},
{
.procname = "smcr_testlink_time",
.data = &init_net.smc.sysctl_smcr_testlink_time,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
{
.procname = "wmem",
.data = &init_net.smc.sysctl_wmem,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_sndbuf,
.extra2 = &max_sndbuf,
},
{
.procname = "rmem",
.data = &init_net.smc.sysctl_rmem,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &min_rcvbuf,
.extra2 = &max_rcvbuf,
},
{
.procname = "smcr_max_links_per_lgr",
.data = &init_net.smc.sysctl_max_links_per_lgr,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &links_per_lgr_min,
.extra2 = &links_per_lgr_max,
},
{
.procname = "smcr_max_conns_per_lgr",
.data = &init_net.smc.sysctl_max_conns_per_lgr,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.extra1 = &conns_per_lgr_min,
.extra2 = &conns_per_lgr_max,
},
{ }
};
int __net_init smc_sysctl_net_init(struct net *net)
{
struct ctl_table *table;
table = smc_table;
if (!net_eq(net, &init_net)) {
int i;
table = kmemdup(table, sizeof(smc_table), GFP_KERNEL);
if (!table)
goto err_alloc;
for (i = 0; i < ARRAY_SIZE(smc_table) - 1; i++)
table[i].data += (void *)net - (void *)&init_net;
}
net->smc.smc_hdr = register_net_sysctl_sz(net, "net/smc", table,
ARRAY_SIZE(smc_table));
if (!net->smc.smc_hdr)
goto err_reg;
net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
net->smc.sysctl_smcr_buf_type = SMCR_PHYS_CONT_BUFS;
net->smc.sysctl_smcr_testlink_time = SMC_LLC_TESTLINK_DEFAULT_TIME;
WRITE_ONCE(net->smc.sysctl_wmem, net_smc_wmem_init);
WRITE_ONCE(net->smc.sysctl_rmem, net_smc_rmem_init);
net->smc.sysctl_max_links_per_lgr = SMC_LINKS_PER_LGR_MAX_PREFER;
net->smc.sysctl_max_conns_per_lgr = SMC_CONN_PER_LGR_PREFER;
return 0;
err_reg:
if (!net_eq(net, &init_net))
kfree(table);
err_alloc:
return -ENOMEM;
}
void __net_exit smc_sysctl_net_exit(struct net *net)
{
const struct ctl_table *table;
table = net->smc.smc_hdr->ctl_table_arg;
unregister_net_sysctl_table(net->smc.smc_hdr);
if (!net_eq(net, &init_net))
kfree(table);
}
|
