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