mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Eric W. Biederman](/assets/img/avatar_default.png)
Now that sys_sysctl is a generic wrapper around /proc/sys .ctl_name and .strategy members of sysctl tables are dead code. Remove them. Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
114 lines
2.5 KiB
C
114 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2007
|
|
*
|
|
* Author: Eric Biederman <ebiederm@xmision.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation, version 2 of the
|
|
* License.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/uts.h>
|
|
#include <linux/utsname.h>
|
|
#include <linux/sysctl.h>
|
|
|
|
static void *get_uts(ctl_table *table, int write)
|
|
{
|
|
char *which = table->data;
|
|
struct uts_namespace *uts_ns;
|
|
|
|
uts_ns = current->nsproxy->uts_ns;
|
|
which = (which - (char *)&init_uts_ns) + (char *)uts_ns;
|
|
|
|
if (!write)
|
|
down_read(&uts_sem);
|
|
else
|
|
down_write(&uts_sem);
|
|
return which;
|
|
}
|
|
|
|
static void put_uts(ctl_table *table, int write, void *which)
|
|
{
|
|
if (!write)
|
|
up_read(&uts_sem);
|
|
else
|
|
up_write(&uts_sem);
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_SYSCTL
|
|
/*
|
|
* Special case of dostring for the UTS structure. This has locks
|
|
* to observe. Should this be in kernel/sys.c ????
|
|
*/
|
|
static int proc_do_uts_string(ctl_table *table, int write,
|
|
void __user *buffer, size_t *lenp, loff_t *ppos)
|
|
{
|
|
struct ctl_table uts_table;
|
|
int r;
|
|
memcpy(&uts_table, table, sizeof(uts_table));
|
|
uts_table.data = get_uts(table, write);
|
|
r = proc_dostring(&uts_table,write,buffer,lenp, ppos);
|
|
put_uts(table, write, uts_table.data);
|
|
return r;
|
|
}
|
|
#else
|
|
#define proc_do_uts_string NULL
|
|
#endif
|
|
|
|
static struct ctl_table uts_kern_table[] = {
|
|
{
|
|
.procname = "ostype",
|
|
.data = init_uts_ns.name.sysname,
|
|
.maxlen = sizeof(init_uts_ns.name.sysname),
|
|
.mode = 0444,
|
|
.proc_handler = proc_do_uts_string,
|
|
},
|
|
{
|
|
.procname = "osrelease",
|
|
.data = init_uts_ns.name.release,
|
|
.maxlen = sizeof(init_uts_ns.name.release),
|
|
.mode = 0444,
|
|
.proc_handler = proc_do_uts_string,
|
|
},
|
|
{
|
|
.procname = "version",
|
|
.data = init_uts_ns.name.version,
|
|
.maxlen = sizeof(init_uts_ns.name.version),
|
|
.mode = 0444,
|
|
.proc_handler = proc_do_uts_string,
|
|
},
|
|
{
|
|
.procname = "hostname",
|
|
.data = init_uts_ns.name.nodename,
|
|
.maxlen = sizeof(init_uts_ns.name.nodename),
|
|
.mode = 0644,
|
|
.proc_handler = proc_do_uts_string,
|
|
},
|
|
{
|
|
.procname = "domainname",
|
|
.data = init_uts_ns.name.domainname,
|
|
.maxlen = sizeof(init_uts_ns.name.domainname),
|
|
.mode = 0644,
|
|
.proc_handler = proc_do_uts_string,
|
|
},
|
|
{}
|
|
};
|
|
|
|
static struct ctl_table uts_root_table[] = {
|
|
{
|
|
.procname = "kernel",
|
|
.mode = 0555,
|
|
.child = uts_kern_table,
|
|
},
|
|
{}
|
|
};
|
|
|
|
static int __init utsname_sysctl_init(void)
|
|
{
|
|
register_sysctl_table(uts_root_table);
|
|
return 0;
|
|
}
|
|
|
|
__initcall(utsname_sysctl_init);
|