95bdfccb2b
The user interface is: register_net_sysctl_table and unregister_net_sysctl_table. Very much like the current interface except there is a network namespace parameter. With this any sysctl registered with register_net_sysctl_table will only show up to tasks in the same network namespace. All other sysctls continue to be globally visible. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Cc: Serge Hallyn <serue@us.ibm.com> Cc: Daniel Lezcano <dlezcano@fr.ibm.com> Cc: Cedric Le Goater <clg@fr.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
114 lines
2.2 KiB
C
114 lines
2.2 KiB
C
/* -*- linux-c -*-
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* sysctl_net.c: sysctl interface to net subsystem.
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*
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* Begun April 1, 1996, Mike Shaver.
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* Added /proc/sys/net directories for each protocol family. [MS]
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*
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* $Log: sysctl_net.c,v $
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* Revision 1.2 1996/05/08 20:24:40 shaver
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* Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
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* NET_IPV4_IP_FORWARD.
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*
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*
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*/
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#include <linux/mm.h>
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#include <linux/sysctl.h>
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#include <linux/nsproxy.h>
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#include <net/sock.h>
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#ifdef CONFIG_INET
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#include <net/ip.h>
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#endif
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#ifdef CONFIG_NET
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#include <linux/if_ether.h>
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#endif
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#ifdef CONFIG_TR
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#include <linux/if_tr.h>
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#endif
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struct ctl_table net_table[] = {
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{
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.ctl_name = NET_CORE,
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.procname = "core",
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.mode = 0555,
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.child = core_table,
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},
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#ifdef CONFIG_INET
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{
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.ctl_name = NET_IPV4,
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.procname = "ipv4",
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.mode = 0555,
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.child = ipv4_table
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},
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#endif
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#ifdef CONFIG_TR
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{
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.ctl_name = NET_TR,
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.procname = "token-ring",
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.mode = 0555,
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.child = tr_table,
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},
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#endif
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{ 0 },
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};
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static struct list_head *
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net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
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{
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return &namespaces->net_ns->sysctl_table_headers;
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}
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static struct ctl_table_root net_sysctl_root = {
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.lookup = net_ctl_header_lookup,
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};
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static int sysctl_net_init(struct net *net)
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{
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INIT_LIST_HEAD(&net->sysctl_table_headers);
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return 0;
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}
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static void sysctl_net_exit(struct net *net)
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{
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WARN_ON(!list_empty(&net->sysctl_table_headers));
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return;
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}
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static struct pernet_operations sysctl_pernet_ops = {
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.init = sysctl_net_init,
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.exit = sysctl_net_exit,
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};
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static __init int sysctl_init(void)
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{
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int ret;
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ret = register_pernet_subsys(&sysctl_pernet_ops);
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if (ret)
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goto out;
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register_sysctl_root(&net_sysctl_root);
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out:
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return ret;
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}
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subsys_initcall(sysctl_init);
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struct ctl_table_header *register_net_sysctl_table(struct net *net,
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const struct ctl_path *path, struct ctl_table *table)
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{
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struct nsproxy namespaces;
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namespaces = *current->nsproxy;
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namespaces.net_ns = net;
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return __register_sysctl_paths(&net_sysctl_root,
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&namespaces, path, table);
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}
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EXPORT_SYMBOL_GPL(register_net_sysctl_table);
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void unregister_net_sysctl_table(struct ctl_table_header *header)
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{
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return unregister_sysctl_table(header);
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}
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EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);
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