0
0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-15 15:04:27 +08:00
linux/net/sysctl_net.c
Joe Perches 3fa21e07e6 net: Remove unnecessary returns from void function()s
This patch removes from net/ (but not any netfilter files)
all the unnecessary return; statements that precede the
last closing brace of void functions.

It does not remove the returns that are immediately
preceded by a label as gcc doesn't like that.

Done via:
$ grep -rP --include=*.[ch] -l "return;\n}" net/ | \
  xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }'

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-17 23:23:14 -07:00

130 lines
3.0 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/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 &current->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_ro_root.default_set,
is_seen);
return 0;
}
static void __net_exit sysctl_net_exit(struct net *net)
{
WARN_ON(!list_empty(&net->sysctls.list));
}
static struct pernet_operations sysctl_pernet_ops = {
.init = sysctl_net_init,
.exit = sysctl_net_exit,
};
static __init int sysctl_init(void)
{
int ret;
ret = register_pernet_subsys(&sysctl_pernet_ops);
if (ret)
goto out;
register_sysctl_root(&net_sysctl_root);
setup_sysctl_set(&net_sysctl_ro_root.default_set, NULL, NULL);
register_sysctl_root(&net_sysctl_ro_root);
out:
return ret;
}
subsys_initcall(sysctl_init);
struct ctl_table_header *register_net_sysctl_table(struct net *net,
const struct ctl_path *path, struct ctl_table *table)
{
struct nsproxy namespaces;
namespaces = *current->nsproxy;
namespaces.net_ns = net;
return __register_sysctl_paths(&net_sysctl_root,
&namespaces, 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,
&init_nsproxy, 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);