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1 | /* -*- linux-c -*- |
2 | * sysctl_net_core.c: sysctl interface to net core subsystem. |
3 | * |
4 | * Begun April 1, 1996, Mike Shaver. |
5 | * Added /proc/sys/net/core directory entry (empty =) ). [MS] |
6 | */ |
7 | |
8 | #include <linux/mm.h> |
9 | #include <linux/sysctl.h> |
10 | #include <linux/module.h> |
11 | #include <linux/socket.h> |
12 | #include <linux/netdevice.h> |
13 | #include <linux/init.h> |
14 | #include <net/ip.h> |
15 | #include <net/sock.h> |
16 | |
17 | static struct ctl_table net_core_table[] = { |
18 | #ifdef CONFIG_NET |
19 | { |
20 | .ctl_name = NET_CORE_WMEM_MAX, |
21 | .procname = "wmem_max", |
22 | .data = &sysctl_wmem_max, |
23 | .maxlen = sizeof(int), |
24 | .mode = 0644, |
25 | .proc_handler = proc_dointvec |
26 | }, |
27 | { |
28 | .ctl_name = NET_CORE_RMEM_MAX, |
29 | .procname = "rmem_max", |
30 | .data = &sysctl_rmem_max, |
31 | .maxlen = sizeof(int), |
32 | .mode = 0644, |
33 | .proc_handler = proc_dointvec |
34 | }, |
35 | { |
36 | .ctl_name = NET_CORE_WMEM_DEFAULT, |
37 | .procname = "wmem_default", |
38 | .data = &sysctl_wmem_default, |
39 | .maxlen = sizeof(int), |
40 | .mode = 0644, |
41 | .proc_handler = proc_dointvec |
42 | }, |
43 | { |
44 | .ctl_name = NET_CORE_RMEM_DEFAULT, |
45 | .procname = "rmem_default", |
46 | .data = &sysctl_rmem_default, |
47 | .maxlen = sizeof(int), |
48 | .mode = 0644, |
49 | .proc_handler = proc_dointvec |
50 | }, |
51 | { |
52 | .ctl_name = NET_CORE_DEV_WEIGHT, |
53 | .procname = "dev_weight", |
54 | .data = &weight_p, |
55 | .maxlen = sizeof(int), |
56 | .mode = 0644, |
57 | .proc_handler = proc_dointvec |
58 | }, |
59 | { |
60 | .ctl_name = NET_CORE_MAX_BACKLOG, |
61 | .procname = "netdev_max_backlog", |
62 | .data = &netdev_max_backlog, |
63 | .maxlen = sizeof(int), |
64 | .mode = 0644, |
65 | .proc_handler = proc_dointvec |
66 | }, |
67 | { |
68 | .ctl_name = NET_CORE_MSG_COST, |
69 | .procname = "message_cost", |
70 | .data = &net_ratelimit_state.interval, |
71 | .maxlen = sizeof(int), |
72 | .mode = 0644, |
73 | .proc_handler = proc_dointvec_jiffies, |
74 | .strategy = sysctl_jiffies, |
75 | }, |
76 | { |
77 | .ctl_name = NET_CORE_MSG_BURST, |
78 | .procname = "message_burst", |
79 | .data = &net_ratelimit_state.burst, |
80 | .maxlen = sizeof(int), |
81 | .mode = 0644, |
82 | .proc_handler = proc_dointvec, |
83 | }, |
84 | { |
85 | .ctl_name = NET_CORE_OPTMEM_MAX, |
86 | .procname = "optmem_max", |
87 | .data = &sysctl_optmem_max, |
88 | .maxlen = sizeof(int), |
89 | .mode = 0644, |
90 | .proc_handler = proc_dointvec |
91 | }, |
92 | #endif /* CONFIG_NET */ |
93 | { |
94 | .ctl_name = NET_CORE_BUDGET, |
95 | .procname = "netdev_budget", |
96 | .data = &netdev_budget, |
97 | .maxlen = sizeof(int), |
98 | .mode = 0644, |
99 | .proc_handler = proc_dointvec |
100 | }, |
101 | { |
102 | .ctl_name = NET_CORE_WARNINGS, |
103 | .procname = "warnings", |
104 | .data = &net_msg_warn, |
105 | .maxlen = sizeof(int), |
106 | .mode = 0644, |
107 | .proc_handler = proc_dointvec |
108 | }, |
109 | { .ctl_name = 0 } |
110 | }; |
111 | |
112 | static struct ctl_table netns_core_table[] = { |
113 | { |
114 | .ctl_name = NET_CORE_SOMAXCONN, |
115 | .procname = "somaxconn", |
116 | .data = &init_net.core.sysctl_somaxconn, |
117 | .maxlen = sizeof(int), |
118 | .mode = 0644, |
119 | .proc_handler = proc_dointvec |
120 | }, |
121 | { .ctl_name = 0 } |
122 | }; |
123 | |
124 | __net_initdata struct ctl_path net_core_path[] = { |
125 | { .procname = "net", .ctl_name = CTL_NET, }, |
126 | { .procname = "core", .ctl_name = NET_CORE, }, |
127 | { }, |
128 | }; |
129 | |
130 | static __net_init int sysctl_core_net_init(struct net *net) |
131 | { |
132 | struct ctl_table *tbl; |
133 | |
134 | net->core.sysctl_somaxconn = SOMAXCONN; |
135 | |
136 | tbl = netns_core_table; |
137 | if (net != &init_net) { |
138 | tbl = kmemdup(tbl, sizeof(netns_core_table), GFP_KERNEL); |
139 | if (tbl == NULL) |
140 | goto err_dup; |
141 | |
142 | tbl[0].data = &net->core.sysctl_somaxconn; |
143 | } |
144 | |
145 | net->core.sysctl_hdr = register_net_sysctl_table(net, |
146 | net_core_path, tbl); |
147 | if (net->core.sysctl_hdr == NULL) |
148 | goto err_reg; |
149 | |
150 | return 0; |
151 | |
152 | err_reg: |
153 | if (tbl != netns_core_table) |
154 | kfree(tbl); |
155 | err_dup: |
156 | return -ENOMEM; |
157 | } |
158 | |
159 | static __net_exit void sysctl_core_net_exit(struct net *net) |
160 | { |
161 | struct ctl_table *tbl; |
162 | |
163 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
164 | unregister_net_sysctl_table(net->core.sysctl_hdr); |
165 | BUG_ON(tbl == netns_core_table); |
166 | kfree(tbl); |
167 | } |
168 | |
169 | static __net_initdata struct pernet_operations sysctl_core_ops = { |
170 | .init = sysctl_core_net_init, |
171 | .exit = sysctl_core_net_exit, |
172 | }; |
173 | |
174 | static __init int sysctl_core_init(void) |
175 | { |
176 | static struct ctl_table empty[1]; |
177 | |
178 | register_sysctl_paths(net_core_path, empty); |
179 | register_net_sysctl_rotable(net_core_path, net_core_table); |
180 | return register_pernet_subsys(&sysctl_core_ops); |
181 | } |
182 | |
183 | fs_initcall(sysctl_core_init); |
184 |
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