60a47a2e82
An nsproxy argument here has always been awkard and now the nsproxy argument is completely unnecessary so remove it, replacing it with the set we want the registered tables to show up in. Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
/* -*- linux-c -*-
|
|
* sysctl_net.c: sysctl interface to net subsystem.
|
|
*
|
|
* Begun April 1, 1996, Mike Shaver.
|
|
* Added /proc/sys/net directories for each protocol family. [MS]
|
|
*
|
|
* Revision 1.2 1996/05/08 20:24:40 shaver
|
|
* Added bits for NET_BRIDGE and the NET_IPV4_ARP stuff and
|
|
* NET_IPV4_IP_FORWARD.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/export.h>
|
|
#include <linux/sysctl.h>
|
|
#include <linux/nsproxy.h>
|
|
|
|
#include <net/sock.h>
|
|
|
|
#ifdef CONFIG_INET
|
|
#include <net/ip.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_NET
|
|
#include <linux/if_ether.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_TR
|
|
#include <linux/if_tr.h>
|
|
#endif
|
|
|
|
static struct ctl_table_set *
|
|
net_ctl_header_lookup(struct ctl_table_root *root, struct nsproxy *namespaces)
|
|
{
|
|
return &namespaces->net_ns->sysctls;
|
|
}
|
|
|
|
static int is_seen(struct ctl_table_set *set)
|
|
{
|
|
return ¤t->nsproxy->net_ns->sysctls == set;
|
|
}
|
|
|
|
/* Return standard mode bits for table entry. */
|
|
static int net_ctl_permissions(struct ctl_table_root *root,
|
|
struct nsproxy *nsproxy,
|
|
struct ctl_table *table)
|
|
{
|
|
/* Allow network administrator to have same access as root. */
|
|
if (capable(CAP_NET_ADMIN)) {
|
|
int mode = (table->mode >> 6) & 7;
|
|
return (mode << 6) | (mode << 3) | mode;
|
|
}
|
|
return table->mode;
|
|
}
|
|
|
|
static struct ctl_table_root net_sysctl_root = {
|
|
.lookup = net_ctl_header_lookup,
|
|
.permissions = net_ctl_permissions,
|
|
};
|
|
|
|
static int net_ctl_ro_header_perms(struct ctl_table_root *root,
|
|
struct nsproxy *namespaces, struct ctl_table *table)
|
|
{
|
|
if (net_eq(namespaces->net_ns, &init_net))
|
|
return table->mode;
|
|
else
|
|
return table->mode & ~0222;
|
|
}
|
|
|
|
static struct ctl_table_root net_sysctl_ro_root = {
|
|
.permissions = net_ctl_ro_header_perms,
|
|
};
|
|
|
|
static int __net_init sysctl_net_init(struct net *net)
|
|
{
|
|
setup_sysctl_set(&net->sysctls, &net_sysctl_root, is_seen);
|
|
return 0;
|
|
}
|
|
|
|
static void __net_exit sysctl_net_exit(struct net *net)
|
|
{
|
|
retire_sysctl_set(&net->sysctls);
|
|
}
|
|
|
|
static struct pernet_operations sysctl_pernet_ops = {
|
|
.init = sysctl_net_init,
|
|
.exit = sysctl_net_exit,
|
|
};
|
|
|
|
static __init int net_sysctl_init(void)
|
|
{
|
|
int ret;
|
|
ret = register_pernet_subsys(&sysctl_pernet_ops);
|
|
if (ret)
|
|
goto out;
|
|
setup_sysctl_set(&net_sysctl_ro_root.default_set, &net_sysctl_ro_root, NULL);
|
|
register_sysctl_root(&net_sysctl_ro_root);
|
|
register_sysctl_root(&net_sysctl_root);
|
|
out:
|
|
return ret;
|
|
}
|
|
subsys_initcall(net_sysctl_init);
|
|
|
|
struct ctl_table_header *register_net_sysctl_table(struct net *net,
|
|
const struct ctl_path *path, struct ctl_table *table)
|
|
{
|
|
return __register_sysctl_paths(&net->sysctls, path, table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_net_sysctl_table);
|
|
|
|
struct ctl_table_header *register_net_sysctl_rotable(const
|
|
struct ctl_path *path, struct ctl_table *table)
|
|
{
|
|
return __register_sysctl_paths(&net_sysctl_ro_root.default_set,
|
|
path, table);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_net_sysctl_rotable);
|
|
|
|
void unregister_net_sysctl_table(struct ctl_table_header *header)
|
|
{
|
|
unregister_sysctl_table(header);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_net_sysctl_table);
|