/*
 *  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/export.h>
#include <linux/uts.h>
#include <linux/utsname.h>
#include <linux/sysctl.h>
#include <linux/wait.h>

#ifdef CONFIG_PROC_SYSCTL

static void *get_uts(struct 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(struct ctl_table *table, int write, void *which)
{
	if (!write)
		up_read(&uts_sem);
	else
		up_write(&uts_sem);
}

/*
 *	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(struct 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);

	if (write)
		proc_sys_poll_notify(table->poll);

	return r;
}
#else
#define proc_do_uts_string NULL
#endif

static DEFINE_CTL_TABLE_POLL(hostname_poll);
static DEFINE_CTL_TABLE_POLL(domainname_poll);

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,
		.poll		= &hostname_poll,
	},
	{
		.procname	= "domainname",
		.data		= init_uts_ns.name.domainname,
		.maxlen		= sizeof(init_uts_ns.name.domainname),
		.mode		= 0644,
		.proc_handler	= proc_do_uts_string,
		.poll		= &domainname_poll,
	},
	{}
};

static struct ctl_table uts_root_table[] = {
	{
		.procname	= "kernel",
		.mode		= 0555,
		.child		= uts_kern_table,
	},
	{}
};

#ifdef CONFIG_PROC_SYSCTL
/*
 * Notify userspace about a change in a certain entry of uts_kern_table,
 * identified by the parameter proc.
 */
void uts_proc_notify(enum uts_proc proc)
{
	struct ctl_table *table = &uts_kern_table[proc];

	proc_sys_poll_notify(table->poll);
}
#endif

static int __init utsname_sysctl_init(void)
{
	register_sysctl_table(uts_root_table);
	return 0;
}

device_initcall(utsname_sysctl_init);
t/diff/include/soc/fsl/bman.h?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>bman.h</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='07cd12945551b63ecb1a349d50a6d69d1d6feb4a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=07cd12945551b63ecb1a349d50a6d69d1d6feb4a'>Diffstat</a> (limited to 'include/soc/fsl/bman.h')</div><table summary='diffstat' class='diffstat'>