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1da177e4 LT |
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> | |
1da177e4 | 10 | #include <linux/module.h> |
20380731 | 11 | #include <linux/socket.h> |
a37ae408 | 12 | #include <linux/netdevice.h> |
33eb9cfc | 13 | #include <linux/init.h> |
20380731 | 14 | #include <net/sock.h> |
a37ae408 | 15 | #include <net/xfrm.h> |
1da177e4 | 16 | |
33eb9cfc | 17 | static struct ctl_table net_core_table[] = { |
1da177e4 LT |
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 | }, | |
1da177e4 LT |
67 | { |
68 | .ctl_name = NET_CORE_MSG_COST, | |
69 | .procname = "message_cost", | |
70 | .data = &net_msg_cost, | |
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_msg_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 | }, | |
f8cd5488 JHS |
92 | #ifdef CONFIG_XFRM |
93 | { | |
94 | .ctl_name = NET_CORE_AEVENT_ETIME, | |
95 | .procname = "xfrm_aevent_etime", | |
96 | .data = &sysctl_xfrm_aevent_etime, | |
97 | .maxlen = sizeof(u32), | |
98 | .mode = 0644, | |
99 | .proc_handler = &proc_dointvec | |
100 | }, | |
101 | { | |
102 | .ctl_name = NET_CORE_AEVENT_RSEQTH, | |
103 | .procname = "xfrm_aevent_rseqth", | |
104 | .data = &sysctl_xfrm_aevent_rseqth, | |
105 | .maxlen = sizeof(u32), | |
106 | .mode = 0644, | |
107 | .proc_handler = &proc_dointvec | |
108 | }, | |
14e50e57 DM |
109 | { |
110 | .ctl_name = CTL_UNNUMBERED, | |
111 | .procname = "xfrm_larval_drop", | |
112 | .data = &sysctl_xfrm_larval_drop, | |
113 | .maxlen = sizeof(int), | |
114 | .mode = 0644, | |
115 | .proc_handler = &proc_dointvec | |
116 | }, | |
01e67d08 DM |
117 | { |
118 | .ctl_name = CTL_UNNUMBERED, | |
119 | .procname = "xfrm_acq_expires", | |
120 | .data = &sysctl_xfrm_acq_expires, | |
121 | .maxlen = sizeof(int), | |
122 | .mode = 0644, | |
123 | .proc_handler = &proc_dointvec | |
124 | }, | |
f8cd5488 | 125 | #endif /* CONFIG_XFRM */ |
1da177e4 LT |
126 | #endif /* CONFIG_NET */ |
127 | { | |
128 | .ctl_name = NET_CORE_SOMAXCONN, | |
129 | .procname = "somaxconn", | |
8efa6e93 | 130 | .data = &init_net.core.sysctl_somaxconn, |
1da177e4 LT |
131 | .maxlen = sizeof(int), |
132 | .mode = 0644, | |
133 | .proc_handler = &proc_dointvec | |
134 | }, | |
51b0bded SH |
135 | { |
136 | .ctl_name = NET_CORE_BUDGET, | |
137 | .procname = "netdev_budget", | |
138 | .data = &netdev_budget, | |
139 | .maxlen = sizeof(int), | |
140 | .mode = 0644, | |
141 | .proc_handler = &proc_dointvec | |
142 | }, | |
a2a316fd SH |
143 | { |
144 | .ctl_name = NET_CORE_WARNINGS, | |
145 | .procname = "warnings", | |
146 | .data = &net_msg_warn, | |
147 | .maxlen = sizeof(int), | |
148 | .mode = 0644, | |
149 | .proc_handler = &proc_dointvec | |
150 | }, | |
1da177e4 LT |
151 | { .ctl_name = 0 } |
152 | }; | |
33eb9cfc | 153 | |
024626e3 | 154 | static __net_initdata struct ctl_path net_core_path[] = { |
33eb9cfc PE |
155 | { .procname = "net", .ctl_name = CTL_NET, }, |
156 | { .procname = "core", .ctl_name = NET_CORE, }, | |
157 | { }, | |
158 | }; | |
159 | ||
024626e3 | 160 | static __net_init int sysctl_core_net_init(struct net *net) |
33eb9cfc | 161 | { |
024626e3 PE |
162 | struct ctl_table *tbl, *tmp; |
163 | ||
8efa6e93 | 164 | net->core.sysctl_somaxconn = SOMAXCONN; |
b8e1f9b5 | 165 | |
024626e3 PE |
166 | tbl = net_core_table; |
167 | if (net != &init_net) { | |
168 | tbl = kmemdup(tbl, sizeof(net_core_table), GFP_KERNEL); | |
169 | if (tbl == NULL) | |
170 | goto err_dup; | |
171 | ||
790a3532 PE |
172 | for (tmp = tbl; tmp->procname; tmp++) { |
173 | if (tmp->data >= (void *)&init_net && | |
174 | tmp->data < (void *)(&init_net + 1)) | |
175 | tmp->data += (char *)net - (char *)&init_net; | |
176 | else | |
177 | tmp->mode &= ~0222; | |
178 | } | |
024626e3 PE |
179 | } |
180 | ||
8efa6e93 | 181 | net->core.sysctl_hdr = register_net_sysctl_table(net, |
024626e3 | 182 | net_core_path, tbl); |
8efa6e93 | 183 | if (net->core.sysctl_hdr == NULL) |
024626e3 | 184 | goto err_reg; |
33eb9cfc | 185 | |
024626e3 PE |
186 | return 0; |
187 | ||
188 | err_reg: | |
189 | if (tbl != net_core_table) | |
190 | kfree(tbl); | |
191 | err_dup: | |
192 | return -ENOMEM; | |
193 | } | |
194 | ||
195 | static __net_exit void sysctl_core_net_exit(struct net *net) | |
196 | { | |
197 | struct ctl_table *tbl; | |
198 | ||
8efa6e93 PE |
199 | tbl = net->core.sysctl_hdr->ctl_table_arg; |
200 | unregister_net_sysctl_table(net->core.sysctl_hdr); | |
024626e3 PE |
201 | BUG_ON(tbl == net_core_table); |
202 | kfree(tbl); | |
203 | } | |
204 | ||
205 | static __net_initdata struct pernet_operations sysctl_core_ops = { | |
206 | .init = sysctl_core_net_init, | |
207 | .exit = sysctl_core_net_exit, | |
208 | }; | |
209 | ||
210 | static __init int sysctl_core_init(void) | |
211 | { | |
212 | return register_pernet_subsys(&sysctl_core_ops); | |
33eb9cfc PE |
213 | } |
214 | ||
215 | __initcall(sysctl_core_init); |