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Revision 1ab5ecb90cb6a3df1476e052f76a6e8f6511cb3d authored by Stanislav Kinsbursky on 12 March 2012, 02:59:41 UTC, committed by David S. Miller on 13 March 2012, 00:14:00 UTC 
tun: don't hold network namespace by tun sockets
 
v3: added previously removed sock_put() to the tun_release() callback, because
sk_release_kernel() doesn't drop the socket reference.

v2: sk_release_kernel() used for socket release. Dummy tun_release() is
required for sk_release_kernel() ---> sock_release() ---> sock->ops->release()
call.

TUN was designed to destroy it's socket on network namesapce shutdown. But this
will never happen for persistent device, because it's socket holds network
namespace.
This patch removes of holding network namespace by TUN socket and replaces it
by creating socket in init_net and then changing it's net it to desired one. On
shutdown socket is moved back to init_net prior to final put.

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent de5c374
Raw File
pinconf.h 
/*
 * Internal interface between the core pin control system and the
 * pin config portions
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 * Based on bits of regulator core, gpio core and clk core
 *
 * Author: Linus Walleij <linus.walleij@linaro.org>
 *
 * License terms: GNU General Public License (GPL) version 2
 */

#ifdef CONFIG_PINCONF

int pinconf_check_ops(struct pinctrl_dev *pctldev);
void pinconf_init_device_debugfs(struct dentry *devroot,
				 struct pinctrl_dev *pctldev);
int pin_config_get_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
			   unsigned long *config);
int pin_config_set_for_pin(struct pinctrl_dev *pctldev, unsigned pin,
			   unsigned long config);

#else

static inline int pinconf_check_ops(struct pinctrl_dev *pctldev)
{
	return 0;
}

static inline void pinconf_init_device_debugfs(struct dentry *devroot,
					       struct pinctrl_dev *pctldev)
{
}

#endif
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