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#
# Light sensors
#
# When adding new entries keep the list in alphabetical order

menu "Light sensors"

config ACPI_ALS
	tristate "ACPI Ambient Light Sensor"
	depends on ACPI
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	select IIO_KFIFO_BUF
	help
	 Say Y here if you want to build a driver for the ACPI0008
	 Ambient Light Sensor.

	 To compile this driver as a module, choose M here: the module will
	 be called acpi-als.

config ADJD_S311
	tristate "ADJD-S311-CR999 digital color sensor"
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	depends on I2C
	help
	 If you say yes here you get support for the Avago ADJD-S311-CR999
	 digital color light sensor.

	 This driver can also be built as a module.  If so, the module
	 will be called adjd_s311.

config AL3320A
	tristate "AL3320A ambient light sensor"
	depends on I2C
	help
	 Say Y here if you want to build a driver for the Dyna Image AL3320A
	 ambient light sensor.

	 To compile this driver as a module, choose M here: the
	 module will be called al3320a.

config APDS9300
	tristate "APDS9300 ambient light sensor"
	depends on I2C
	help
	 Say Y here if you want to build a driver for the Avago APDS9300
	 ambient light sensor.

	 To compile this driver as a module, choose M here: the
	 module will be called apds9300.

config APDS9960
	tristate "Avago APDS9960 gesture/RGB/ALS/proximity sensor"
	select REGMAP_I2C
	select IIO_BUFFER
	select IIO_KFIFO_BUF
	depends on I2C
	help
	  Say Y here to build I2C interface support for the Avago
	  APDS9960 gesture/RGB/ALS/proximity sensor.

	  To compile this driver as a module, choose M here: the
	  module will be called apds9960

config BH1750
	tristate "ROHM BH1750 ambient light sensor"
	depends on I2C
	help
	 Say Y here to build support for the ROHM BH1710, BH1715, BH1721,
	 BH1750, BH1751 ambient light sensors.

	 To compile this driver as a module, choose M here: the module will
	 be called bh1750.

config BH1780
	tristate "ROHM BH1780 ambient light sensor"
	depends on I2C
	depends on !SENSORS_BH1780
	help
	 Say Y here to build support for the ROHM BH1780GLI ambient
	 light sensor.

	 To compile this driver as a module, choose M here: the module will
	 be called bh1780.

config CM32181
	depends on I2C
	tristate "CM32181 driver"
	help
	 Say Y here if you use cm32181.
	 This option enables ambient light sensor using
	 Capella cm32181 device driver.

	 To compile this driver as a module, choose M here:
	 the module will be called cm32181.

config CM3232
	depends on I2C
	tristate "CM3232 ambient light sensor"
	help
	 Say Y here if you use cm3232.
	 This option enables ambient light sensor using
	 Capella Microsystems cm3232 device driver.

	 To compile this driver as a module, choose M here:
	 the module will be called cm3232.

config CM3323
	depends on I2C
	tristate "Capella CM3323 color light sensor"
	help
	 Say Y here if you want to build a driver for Capella CM3323
	 color sensor.

	 To compile this driver as a module, choose M here: the module will
	 be called cm3323.

config CM36651
	depends on I2C
	tristate "CM36651 driver"
	help
	 Say Y here if you use cm36651.
	 This option enables proximity & RGB sensor using
	 Capella cm36651 device driver.

	 To compile this driver as a module, choose M here:
	 the module will be called cm36651.

config GP2AP020A00F
	tristate "Sharp GP2AP020A00F Proximity/ALS sensor"
	depends on I2C
	select REGMAP_I2C
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	select IRQ_WORK
	help
	  Say Y here if you have a Sharp GP2AP020A00F proximity/ALS combo-chip
	  hooked to an I2C bus.

	  To compile this driver as a module, choose M here: the
	  module will be called gp2ap020a00f.

config ISL29125
	tristate "Intersil ISL29125 digital color light sensor"
	depends on I2C
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	help
	  Say Y here if you want to build a driver for the Intersil ISL29125
	  RGB light sensor for I2C.

	  To compile this driver as a module, choose M here: the module will be
	  called isl29125.

config HID_SENSOR_ALS
	depends on HID_SENSOR_HUB
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	select HID_SENSOR_IIO_COMMON
	select HID_SENSOR_IIO_TRIGGER
	tristate "HID ALS"
	help
	  Say yes here to build support for the HID SENSOR
	  Ambient light sensor.

	  To compile this driver as a module, choose M here: the
	  module will be called hid-sensor-als.

config HID_SENSOR_PROX
	depends on HID_SENSOR_HUB
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	select HID_SENSOR_IIO_COMMON
	select HID_SENSOR_IIO_TRIGGER
	tristate "HID PROX"
	help
	  Say yes here to build support for the HID SENSOR
	  Proximity sensor.

	  To compile this driver as a module, choose M here: the
	  module will be called hid-sensor-prox.

config JSA1212
	tristate "JSA1212 ALS and proximity sensor driver"
	depends on I2C
	select REGMAP_I2C
	help
	 Say Y here if you want to build a IIO driver for JSA1212
	 proximity & ALS sensor device.

	 To compile this driver as a module, choose M here:
	 the module will be called jsa1212.

config RPR0521
	tristate "ROHM RPR0521 ALS and proximity sensor driver"
	depends on I2C
	select REGMAP_I2C
	help
	 Say Y here if you want to build support for ROHM's RPR0521
	 ambient light and proximity sensor device.

	 To compile this driver as a module, choose M here:
	 the module will be called rpr0521.

config SENSORS_LM3533
	tristate "LM3533 ambient light sensor"
	depends on MFD_LM3533
	help
	  If you say yes here you get support for the ambient light sensor
	  interface on National Semiconductor / TI LM3533 Lighting Power
	  chips.

	  The sensor interface can be used to control the LEDs and backlights
	  of the chip through defining five light zones and three sets of
	  corresponding output-current values.

	  The driver provides raw and mean adc readings along with the current
	  light zone through sysfs. A threshold event can be generated on zone
	  changes. The ALS-control output values can be set per zone for the
	  three current output channels.

config LTR501
	tristate "LTR-501ALS-01 light sensor"
	depends on I2C
	select REGMAP_I2C
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	help
	 If you say yes here you get support for the Lite-On LTR-501ALS-01
	 ambient light and proximity sensor. This driver also supports LTR-559
	 ALS/PS or LTR-301 ALS sensors.

	 This driver can also be built as a module.  If so, the module
         will be called ltr501.

config MAX44000
	tristate "MAX44000 Ambient and Infrared Proximity Sensor"
	depends on I2C
	select REGMAP_I2C
	help
	 Say Y here if you want to build support for Maxim Integrated's
	 MAX44000 ambient and infrared proximity sensor device.

	 To compile this driver as a module, choose M here:
	 the module will be called max44000.

config OPT3001
	tristate "Texas Instruments OPT3001 Light Sensor"
	depends on I2C
	help
	  If you say Y or M here, you get support for Texas Instruments
	  OPT3001 Ambient Light Sensor.

	  If built as a dynamically linked module, it will be called
	  opt3001.

config PA12203001
        tristate "TXC PA12203001 light and proximity sensor"
        depends on I2C
        select REGMAP_I2C
        help
         If you say yes here you get support for the TXC PA12203001
         ambient light and proximity sensor.

         This driver can also be built as a module.  If so, the module
         will be called pa12203001.

config STK3310
	tristate "STK3310 ALS and proximity sensor"
	depends on I2C
	select REGMAP_I2C
	help
	 Say yes here to get support for the Sensortek STK3310 ambient light
	 and proximity sensor. The STK3311 model is also supported by this
	 driver.

	 Choosing M will build the driver as a module. If so, the module
	 will be called stk3310.

config TCS3414
	tristate "TAOS TCS3414 digital color sensor"
	depends on I2C
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	help
	 If you say yes here you get support for the TAOS TCS3414
	 family of digital color sensors.

	 This driver can also be built as a module.  If so, the module
	 will be called tcs3414.

config TCS3472
	tristate "TAOS TCS3472 color light-to-digital converter"
	depends on I2C
	select IIO_BUFFER
	select IIO_TRIGGERED_BUFFER
	help
	 If you say yes here you get support for the TAOS TCS3472
	 family of color light-to-digital converters with IR filter.

	 This driver can also be built as a module.  If so, the module
	 will be called tcs3472.

config SENSORS_TSL2563
	tristate "TAOS TSL2560, TSL2561, TSL2562 and TSL2563 ambient light sensors"
	depends on I2C
	help
	 If you say yes here you get support for the Taos TSL2560,
	 TSL2561, TSL2562 and TSL2563 ambient light sensors.

	 This driver can also be built as a module.  If so, the module
	 will be called tsl2563.

config TSL4531
	tristate "TAOS TSL4531 ambient light sensors"
	depends on I2C
	help
	 Say Y here if you want to build a driver for the TAOS TSL4531 family
	 of ambient light sensors with direct lux output.

	 To compile this driver as a module, choose M here: the
	 module will be called tsl4531.

config US5182D
	tristate "UPISEMI light and proximity sensor"
	depends on I2C
	help
	 If you say yes here you get support for the UPISEMI US5182D
	 ambient light and proximity sensor.

	 This driver can also be built as a module.  If so, the module
	 will be called us5182d.

config VCNL4000
	tristate "VCNL4000 combined ALS and proximity sensor"
	depends on I2C
	help
	 Say Y here if you want to build a driver for the Vishay VCNL4000
	 combined ambient light and proximity sensor.

	 To compile this driver as a module, choose M here: the
	 module will be called vcnl4000.

config VEML6070
	tristate "VEML6070 UV A light sensor"
	depends on I2C
	help
	 Say Y here if you want to build a driver for the Vishay VEML6070 UV A
	 light sensor.

	 To compile this driver as a module, choose M here: the
	 module will be called veml6070.

endmenu
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/*
 * xfrm_state.c
 *
 * Changes:
 *	Mitsuru KANDA @USAGI
 * 	Kazunori MIYAZAWA @USAGI
 * 	Kunihiro Ishiguro <kunihiro@ipinfusion.com>
 * 		IPv6 support
 * 	YOSHIFUJI Hideaki @USAGI
 * 		Split up af-specific functions
 *	Derek Atkins <derek@ihtfp.com>
 *		Add UDP Encapsulation
 *
 */

#include <linux/workqueue.h>
#include <net/xfrm.h>
#include <linux/pfkeyv2.h>
#include <linux/ipsec.h>
#include <linux/module.h>
#include <linux/cache.h>
#include <linux/audit.h>
#include <asm/uaccess.h>
#include <linux/ktime.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>

#include "xfrm_hash.h"

/* Each xfrm_state may be linked to two tables:

   1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
   2. Hash table by (daddr,family,reqid) to find what SAs exist for given
      destination/tunnel endpoint. (output)
 */

static DEFINE_SPINLOCK(xfrm_state_lock);

static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024;

static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family);
static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);

static inline unsigned int xfrm_dst_hash(struct net *net,
					 const xfrm_address_t *daddr,
					 const xfrm_address_t *saddr,
					 u32 reqid,
					 unsigned short family)
{
	return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask);
}

static inline unsigned int xfrm_src_hash(struct net *net,
					 const xfrm_address_t *daddr,
					 const xfrm_address_t *saddr,
					 unsigned short family)
{
	return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask);
}

static inline unsigned int
xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr,
	      __be32 spi, u8 proto, unsigned short family)
{
	return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask);
}

static void xfrm_hash_transfer(struct hlist_head *list,
			       struct hlist_head *ndsttable,
			       struct hlist_head *nsrctable,
			       struct hlist_head *nspitable,
			       unsigned int nhashmask)
{
	struct hlist_node *entry, *tmp;
	struct xfrm_state *x;

	hlist_for_each_entry_safe(x, entry, tmp, list, bydst) {
		unsigned int h;

		h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
				    x->props.reqid, x->props.family,
				    nhashmask);
		hlist_add_head(&x->bydst, ndsttable+h);

		h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr,
				    x->props.family,
				    nhashmask);
		hlist_add_head(&x->bysrc, nsrctable+h);

		if (x->id.spi) {
			h = __xfrm_spi_hash(&x->id.daddr, x->id.spi,
					    x->id.proto, x->props.family,
					    nhashmask);
			hlist_add_head(&x->byspi, nspitable+h);
		}
	}
}

static unsigned long xfrm_hash_new_size(unsigned int state_hmask)
{
	return ((state_hmask + 1) << 1) * sizeof(struct hlist_head);
}

static DEFINE_MUTEX(hash_resize_mutex);

static void xfrm_hash_resize(struct work_struct *work)
{
	struct net *net = container_of(work, struct net, xfrm.state_hash_work);
	struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi;
	unsigned long nsize, osize;
	unsigned int nhashmask, ohashmask;
	int i;

	mutex_lock(&hash_resize_mutex);

	nsize = xfrm_hash_new_size(net->xfrm.state_hmask);
	ndst = xfrm_hash_alloc(nsize);
	if (!ndst)
		goto out_unlock;
	nsrc = xfrm_hash_alloc(nsize);
	if (!nsrc) {
		xfrm_hash_free(ndst, nsize);
		goto out_unlock;
	}
	nspi = xfrm_hash_alloc(nsize);
	if (!nspi) {
		xfrm_hash_free(ndst, nsize);
		xfrm_hash_free(nsrc, nsize);
		goto out_unlock;
	}

	spin_lock_bh(&xfrm_state_lock);

	nhashmask = (nsize / sizeof(struct hlist_head)) - 1U;
	for (i = net->xfrm.state_hmask; i >= 0; i--)
		xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi,
				   nhashmask);

	odst = net->xfrm.state_bydst;
	osrc = net->xfrm.state_bysrc;
	ospi = net->xfrm.state_byspi;
	ohashmask = net->xfrm.state_hmask;

	net->xfrm.state_bydst = ndst;
	net->xfrm.state_bysrc = nsrc;
	net->xfrm.state_byspi = nspi;
	net->xfrm.state_hmask = nhashmask;

	spin_unlock_bh(&xfrm_state_lock);

	osize = (ohashmask + 1) * sizeof(struct hlist_head);
	xfrm_hash_free(odst, osize);
	xfrm_hash_free(osrc, osize);
	xfrm_hash_free(ospi, osize);

out_unlock:
	mutex_unlock(&hash_resize_mutex);
}

static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];

static DEFINE_SPINLOCK(xfrm_state_gc_lock);

int __xfrm_state_delete(struct xfrm_state *x);

int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
void km_state_expired(struct xfrm_state *x, int hard, u32 pid);

static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family)
{
	struct xfrm_state_afinfo *afinfo;
	if (unlikely(family >= NPROTO))
		return NULL;
	write_lock_bh(&xfrm_state_afinfo_lock);
	afinfo = xfrm_state_afinfo[family];
	if (unlikely(!afinfo))
		write_unlock_bh(&xfrm_state_afinfo_lock);
	return afinfo;
}

static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo)
	__releases(xfrm_state_afinfo_lock)
{
	write_unlock_bh(&xfrm_state_afinfo_lock);
}

int xfrm_register_type(const struct xfrm_type *type, unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
	const struct xfrm_type **typemap;
	int err = 0;

	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;
	typemap = afinfo->type_map;

	if (likely(typemap[type->proto] == NULL))
		typemap[type->proto] = type;
	else
		err = -EEXIST;
	xfrm_state_unlock_afinfo(afinfo);
	return err;
}
EXPORT_SYMBOL(xfrm_register_type);

int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family);
	const struct xfrm_type **typemap;
	int err = 0;

	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;
	typemap = afinfo->type_map;

	if (unlikely(typemap[type->proto] != type))
		err = -ENOENT;
	else
		typemap[type->proto] = NULL;
	xfrm_state_unlock_afinfo(afinfo);
	return err;
}
EXPORT_SYMBOL(xfrm_unregister_type);

static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family)
{
	struct xfrm_state_afinfo *afinfo;
	const struct xfrm_type **typemap;
	const struct xfrm_type *type;
	int modload_attempted = 0;

retry:
	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return NULL;
	typemap = afinfo->type_map;

	type = typemap[proto];
	if (unlikely(type && !try_module_get(type->owner)))
		type = NULL;
	if (!type && !modload_attempted) {
		xfrm_state_put_afinfo(afinfo);
		request_module("xfrm-type-%d-%d", family, proto);
		modload_attempted = 1;
		goto retry;
	}

	xfrm_state_put_afinfo(afinfo);
	return type;
}

static void xfrm_put_type(const struct xfrm_type *type)
{
	module_put(type->owner);
}

int xfrm_register_mode(struct xfrm_mode *mode, int family)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode **modemap;
	int err;

	if (unlikely(mode->encap >= XFRM_MODE_MAX))
		return -EINVAL;

	afinfo = xfrm_state_lock_afinfo(family);
	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;

	err = -EEXIST;
	modemap = afinfo->mode_map;
	if (modemap[mode->encap])
		goto out;

	err = -ENOENT;
	if (!try_module_get(afinfo->owner))
		goto out;

	mode->afinfo = afinfo;
	modemap[mode->encap] = mode;
	err = 0;

out:
	xfrm_state_unlock_afinfo(afinfo);
	return err;
}
EXPORT_SYMBOL(xfrm_register_mode);

int xfrm_unregister_mode(struct xfrm_mode *mode, int family)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode **modemap;
	int err;

	if (unlikely(mode->encap >= XFRM_MODE_MAX))
		return -EINVAL;

	afinfo = xfrm_state_lock_afinfo(family);
	if (unlikely(afinfo == NULL))
		return -EAFNOSUPPORT;

	err = -ENOENT;
	modemap = afinfo->mode_map;
	if (likely(modemap[mode->encap] == mode)) {
		modemap[mode->encap] = NULL;
		module_put(mode->afinfo->owner);
		err = 0;
	}

	xfrm_state_unlock_afinfo(afinfo);
	return err;
}
EXPORT_SYMBOL(xfrm_unregister_mode);

static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode *mode;
	int modload_attempted = 0;

	if (unlikely(encap >= XFRM_MODE_MAX))
		return NULL;

retry:
	afinfo = xfrm_state_get_afinfo(family);
	if (unlikely(afinfo == NULL))
		return NULL;

	mode = afinfo->mode_map[encap];
	if (unlikely(mode && !try_module_get(mode->owner)))
		mode = NULL;
	if (!mode && !modload_attempted) {
		xfrm_state_put_afinfo(afinfo);
		request_module("xfrm-mode-%d-%d", family, encap);
		modload_attempted = 1;
		goto retry;
	}

	xfrm_state_put_afinfo(afinfo);
	return mode;
}

static void xfrm_put_mode(struct xfrm_mode *mode)
{
	module_put(mode->owner);
}

static void xfrm_state_gc_destroy(struct xfrm_state *x)
{
	tasklet_hrtimer_cancel(&x->mtimer);
	del_timer_sync(&x->rtimer);
	kfree(x->aalg);
	kfree(x->ealg);
	kfree(x->calg);
	kfree(x->encap);
	kfree(x->coaddr);
	kfree(x->replay_esn);
	kfree(x->preplay_esn);
	if (x->inner_mode)
		xfrm_put_mode(x->inner_mode);
	if (x->inner_mode_iaf)
		xfrm_put_mode(x->inner_mode_iaf);
	if (x->outer_mode)
		xfrm_put_mode(x->outer_mode);
	if (x->type) {
		x->type->destructor(x);
		xfrm_put_type(x->type);
	}
	security_xfrm_state_free(x);
	kfree(x);
}

static void xfrm_state_gc_task(struct work_struct *work)
{
	struct net *net = container_of(work, struct net, xfrm.state_gc_work);
	struct xfrm_state *x;
	struct hlist_node *entry, *tmp;
	struct hlist_head gc_list;

	spin_lock_bh(&xfrm_state_gc_lock);
	hlist_move_list(&net->xfrm.state_gc_list, &gc_list);
	spin_unlock_bh(&xfrm_state_gc_lock);

	hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist)
		xfrm_state_gc_destroy(x);

	wake_up(&net->xfrm.km_waitq);
}

static inline unsigned long make_jiffies(long secs)
{
	if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ)
		return MAX_SCHEDULE_TIMEOUT-1;
	else
		return secs*HZ;
}

static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me)
{
	struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer);
	struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer);
	struct net *net = xs_net(x);
	unsigned long now = get_seconds();
	long next = LONG_MAX;
	int warn = 0;
	int err = 0;

	spin_lock(&x->lock);
	if (x->km.state == XFRM_STATE_DEAD)
		goto out;
	if (x->km.state == XFRM_STATE_EXPIRED)
		goto expired;
	if (x->lft.hard_add_expires_seconds) {
		long tmo = x->lft.hard_add_expires_seconds +
			x->curlft.add_time - now;
		if (tmo <= 0) {
			if (x->xflags & XFRM_SOFT_EXPIRE) {
				/* enter hard expire without soft expire first?!
				 * setting a new date could trigger this.
				 * workarbound: fix x->curflt.add_time by below:
				 */
				x->curlft.add_time = now - x->saved_tmo - 1;
				tmo = x->lft.hard_add_expires_seconds - x->saved_tmo;
			} else
				goto expired;
		}
		if (tmo < next)
			next = tmo;
	}
	if (x->lft.hard_use_expires_seconds) {
		long tmo = x->lft.hard_use_expires_seconds +
			(x->curlft.use_time ? : now) - now;
		if (tmo <= 0)
			goto expired;
		if (tmo < next)
			next = tmo;
	}
	if (x->km.dying)
		goto resched;
	if (x->lft.soft_add_expires_seconds) {
		long tmo = x->lft.soft_add_expires_seconds +
			x->curlft.add_time - now;
		if (tmo <= 0) {
			warn = 1;
			x->xflags &= ~XFRM_SOFT_EXPIRE;
		} else if (tmo < next) {
			next = tmo;
			x->xflags |= XFRM_SOFT_EXPIRE;
			x->saved_tmo = tmo;
		}
	}
	if (x->lft.soft_use_expires_seconds) {
		long tmo = x->lft.soft_use_expires_seconds +
			(x->curlft.use_time ? : now) - now;
		if (tmo <= 0)
			warn = 1;
		else if (tmo < next)
			next = tmo;
	}

	x->km.dying = warn;
	if (warn)
		km_state_expired(x, 0, 0);
resched:
	if (next != LONG_MAX){
		tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL);
	}

	goto out;

expired:
	if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) {
		x->km.state = XFRM_STATE_EXPIRED;
		wake_up(&net->xfrm.km_waitq);
		next = 2;
		goto resched;
	}

	err = __xfrm_state_delete(x);
	if (!err && x->id.spi)
		km_state_expired(x, 1, 0);

	xfrm_audit_state_delete(x, err ? 0 : 1,
				audit_get_loginuid(current),
				audit_get_sessionid(current), 0);

out:
	spin_unlock(&x->lock);
	return HRTIMER_NORESTART;
}

static void xfrm_replay_timer_handler(unsigned long data);

struct xfrm_state *xfrm_state_alloc(struct net *net)
{
	struct xfrm_state *x;

	x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC);

	if (x) {
		write_pnet(&x->xs_net, net);
		atomic_set(&x->refcnt, 1);
		atomic_set(&x->tunnel_users, 0);
		INIT_LIST_HEAD(&x->km.all);
		INIT_HLIST_NODE(&x->bydst);
		INIT_HLIST_NODE(&x->bysrc);
		INIT_HLIST_NODE(&x->byspi);
		tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
		setup_timer(&x->rtimer, xfrm_replay_timer_handler,
				(unsigned long)x);
		x->curlft.add_time = get_seconds();
		x->lft.soft_byte_limit = XFRM_INF;
		x->lft.soft_packet_limit = XFRM_INF;
		x->lft.hard_byte_limit = XFRM_INF;
		x->lft.hard_packet_limit = XFRM_INF;
		x->replay_maxage = 0;
		x->replay_maxdiff = 0;
		x->inner_mode = NULL;
		x->inner_mode_iaf = NULL;
		spin_lock_init(&x->lock);
	}
	return x;
}
EXPORT_SYMBOL(xfrm_state_alloc);

void __xfrm_state_destroy(struct xfrm_state *x)
{
	struct net *net = xs_net(x);

	WARN_ON(x->km.state != XFRM_STATE_DEAD);

	spin_lock_bh(&xfrm_state_gc_lock);
	hlist_add_head(&x->gclist, &net->xfrm.state_gc_list);
	spin_unlock_bh(&xfrm_state_gc_lock);
	schedule_work(&net->xfrm.state_gc_work);
}
EXPORT_SYMBOL(__xfrm_state_destroy);

int __xfrm_state_delete(struct xfrm_state *x)
{
	struct net *net = xs_net(x);
	int err = -ESRCH;

	if (x->km.state != XFRM_STATE_DEAD) {
		x->km.state = XFRM_STATE_DEAD;
		spin_lock(&xfrm_state_lock);
		list_del(&x->km.all);
		hlist_del(&x->bydst);
		hlist_del(&x->bysrc);
		if (x->id.spi)
			hlist_del(&x->byspi);
		net->xfrm.state_num--;
		spin_unlock(&xfrm_state_lock);

		/* All xfrm_state objects are created by xfrm_state_alloc.
		 * The xfrm_state_alloc call gives a reference, and that
		 * is what we are dropping here.
		 */
		xfrm_state_put(x);
		err = 0;
	}

	return err;
}
EXPORT_SYMBOL(__xfrm_state_delete);

int xfrm_state_delete(struct xfrm_state *x)
{
	int err;

	spin_lock_bh(&x->lock);
	err = __xfrm_state_delete(x);
	spin_unlock_bh(&x->lock);

	return err;
}
EXPORT_SYMBOL(xfrm_state_delete);

#ifdef CONFIG_SECURITY_NETWORK_XFRM
static inline int
xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
{
	int i, err = 0;

	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct hlist_node *entry;
		struct xfrm_state *x;

		hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
			if (xfrm_id_proto_match(x->id.proto, proto) &&
			   (err = security_xfrm_state_delete(x)) != 0) {
				xfrm_audit_state_delete(x, 0,
							audit_info->loginuid,
							audit_info->sessionid,
							audit_info->secid);
				return err;
			}
		}
	}

	return err;
}
#else
static inline int
xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info)
{
	return 0;
}
#endif

int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info)
{
	int i, err = 0, cnt = 0;

	spin_lock_bh(&xfrm_state_lock);
	err = xfrm_state_flush_secctx_check(net, proto, audit_info);
	if (err)
		goto out;

	err = -ESRCH;
	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct hlist_node *entry;
		struct xfrm_state *x;
restart:
		hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
			if (!xfrm_state_kern(x) &&
			    xfrm_id_proto_match(x->id.proto, proto)) {
				xfrm_state_hold(x);
				spin_unlock_bh(&xfrm_state_lock);

				err = xfrm_state_delete(x);
				xfrm_audit_state_delete(x, err ? 0 : 1,
							audit_info->loginuid,
							audit_info->sessionid,
							audit_info->secid);
				xfrm_state_put(x);
				if (!err)
					cnt++;

				spin_lock_bh(&xfrm_state_lock);
				goto restart;
			}
		}
	}
	if (cnt)
		err = 0;

out:
	spin_unlock_bh(&xfrm_state_lock);
	wake_up(&net->xfrm.km_waitq);
	return err;
}
EXPORT_SYMBOL(xfrm_state_flush);

void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si)
{
	spin_lock_bh(&xfrm_state_lock);
	si->sadcnt = net->xfrm.state_num;
	si->sadhcnt = net->xfrm.state_hmask;
	si->sadhmcnt = xfrm_state_hashmax;
	spin_unlock_bh(&xfrm_state_lock);
}
EXPORT_SYMBOL(xfrm_sad_getinfo);

static int
xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl,
		    const struct xfrm_tmpl *tmpl,
		    const xfrm_address_t *daddr, const xfrm_address_t *saddr,
		    unsigned short family)
{
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	if (!afinfo)
		return -1;
	afinfo->init_tempsel(&x->sel, fl);

	if (family != tmpl->encap_family) {
		xfrm_state_put_afinfo(afinfo);
		afinfo = xfrm_state_get_afinfo(tmpl->encap_family);
		if (!afinfo)
			return -1;
	}
	afinfo->init_temprop(x, tmpl, daddr, saddr);
	xfrm_state_put_afinfo(afinfo);
	return 0;
}

static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark,
					      const xfrm_address_t *daddr,
					      __be32 spi, u8 proto,
					      unsigned short family)
{
	unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family);
	struct xfrm_state *x;
	struct hlist_node *entry;

	hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) {
		if (x->props.family != family ||
		    x->id.spi       != spi ||
		    x->id.proto     != proto ||
		    xfrm_addr_cmp(&x->id.daddr, daddr, family))
			continue;

		if ((mark & x->mark.m) != x->mark.v)
			continue;
		xfrm_state_hold(x);
		return x;
	}

	return NULL;
}

static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark,
						     const xfrm_address_t *daddr,
						     const xfrm_address_t *saddr,
						     u8 proto, unsigned short family)
{
	unsigned int h = xfrm_src_hash(net, daddr, saddr, family);
	struct xfrm_state *x;
	struct hlist_node *entry;

	hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) {
		if (x->props.family != family ||
		    x->id.proto     != proto ||
		    xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
		    xfrm_addr_cmp(&x->props.saddr, saddr, family))
			continue;

		if ((mark & x->mark.m) != x->mark.v)
			continue;
		xfrm_state_hold(x);
		return x;
	}

	return NULL;
}

static inline struct xfrm_state *
__xfrm_state_locate(struct xfrm_state *x, int use_spi, int family)
{
	struct net *net = xs_net(x);
	u32 mark = x->mark.v & x->mark.m;

	if (use_spi)
		return __xfrm_state_lookup(net, mark, &x->id.daddr,
					   x->id.spi, x->id.proto, family);
	else
		return __xfrm_state_lookup_byaddr(net, mark,
						  &x->id.daddr,
						  &x->props.saddr,
						  x->id.proto, family);
}

static void xfrm_hash_grow_check(struct net *net, int have_hash_collision)
{
	if (have_hash_collision &&
	    (net->xfrm.state_hmask + 1) < xfrm_state_hashmax &&
	    net->xfrm.state_num > net->xfrm.state_hmask)
		schedule_work(&net->xfrm.state_hash_work);
}

static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x,
			       const struct flowi *fl, unsigned short family,
			       struct xfrm_state **best, int *acq_in_progress,
			       int *error)
{
	/* Resolution logic:
	 * 1. There is a valid state with matching selector. Done.
	 * 2. Valid state with inappropriate selector. Skip.
	 *
	 * Entering area of "sysdeps".
	 *
	 * 3. If state is not valid, selector is temporary, it selects
	 *    only session which triggered previous resolution. Key
	 *    manager will do something to install a state with proper
	 *    selector.
	 */
	if (x->km.state == XFRM_STATE_VALID) {
		if ((x->sel.family &&
		     !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
		    !security_xfrm_state_pol_flow_match(x, pol, fl))
			return;

		if (!*best ||
		    (*best)->km.dying > x->km.dying ||
		    ((*best)->km.dying == x->km.dying &&
		     (*best)->curlft.add_time < x->curlft.add_time))
			*best = x;
	} else if (x->km.state == XFRM_STATE_ACQ) {
		*acq_in_progress = 1;
	} else if (x->km.state == XFRM_STATE_ERROR ||
		   x->km.state == XFRM_STATE_EXPIRED) {
		if (xfrm_selector_match(&x->sel, fl, x->sel.family) &&
		    security_xfrm_state_pol_flow_match(x, pol, fl))
			*error = -ESRCH;
	}
}

struct xfrm_state *
xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
		const struct flowi *fl, struct xfrm_tmpl *tmpl,
		struct xfrm_policy *pol, int *err,
		unsigned short family)
{
	static xfrm_address_t saddr_wildcard = { };
	struct net *net = xp_net(pol);
	unsigned int h, h_wildcard;
	struct hlist_node *entry;
	struct xfrm_state *x, *x0, *to_put;
	int acquire_in_progress = 0;
	int error = 0;
	struct xfrm_state *best = NULL;
	u32 mark = pol->mark.v & pol->mark.m;
	unsigned short encap_family = tmpl->encap_family;

	to_put = NULL;

	spin_lock_bh(&xfrm_state_lock);
	h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family);
	hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
		if (x->props.family == encap_family &&
		    x->props.reqid == tmpl->reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    !(x->props.flags & XFRM_STATE_WILDRECV) &&
		    xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
		    tmpl->mode == x->props.mode &&
		    tmpl->id.proto == x->id.proto &&
		    (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
			xfrm_state_look_at(pol, x, fl, encap_family,
					   &best, &acquire_in_progress, &error);
	}
	if (best)
		goto found;

	h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family);
	hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) {
		if (x->props.family == encap_family &&
		    x->props.reqid == tmpl->reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    !(x->props.flags & XFRM_STATE_WILDRECV) &&
		    xfrm_state_addr_check(x, daddr, saddr, encap_family) &&
		    tmpl->mode == x->props.mode &&
		    tmpl->id.proto == x->id.proto &&
		    (tmpl->id.spi == x->id.spi || !tmpl->id.spi))
			xfrm_state_look_at(pol, x, fl, encap_family,
					   &best, &acquire_in_progress, &error);
	}

found:
	x = best;
	if (!x && !error && !acquire_in_progress) {
		if (tmpl->id.spi &&
		    (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi,
					      tmpl->id.proto, encap_family)) != NULL) {
			to_put = x0;
			error = -EEXIST;
			goto out;
		}
		x = xfrm_state_alloc(net);
		if (x == NULL) {
			error = -ENOMEM;
			goto out;
		}
		/* Initialize temporary state matching only
		 * to current session. */
		xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family);
		memcpy(&x->mark, &pol->mark, sizeof(x->mark));

		error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid);
		if (error) {
			x->km.state = XFRM_STATE_DEAD;
			to_put = x;
			x = NULL;
			goto out;
		}

		if (km_query(x, tmpl, pol) == 0) {
			x->km.state = XFRM_STATE_ACQ;
			list_add(&x->km.all, &net->xfrm.state_all);
			hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
			h = xfrm_src_hash(net, daddr, saddr, encap_family);
			hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);
			if (x->id.spi) {
				h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family);
				hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
			}
			x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
			tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
			net->xfrm.state_num++;
			xfrm_hash_grow_check(net, x->bydst.next != NULL);
		} else {
			x->km.state = XFRM_STATE_DEAD;
			to_put = x;
			x = NULL;
			error = -ESRCH;
		}
	}
out:
	if (x)
		xfrm_state_hold(x);
	else
		*err = acquire_in_progress ? -EAGAIN : error;
	spin_unlock_bh(&xfrm_state_lock);
	if (to_put)
		xfrm_state_put(to_put);
	return x;
}

struct xfrm_state *
xfrm_stateonly_find(struct net *net, u32 mark,
		    xfrm_address_t *daddr, xfrm_address_t *saddr,
		    unsigned short family, u8 mode, u8 proto, u32 reqid)
{
	unsigned int h;
	struct xfrm_state *rx = NULL, *x = NULL;
	struct hlist_node *entry;

	spin_lock(&xfrm_state_lock);
	h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
	hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
		if (x->props.family == family &&
		    x->props.reqid == reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    !(x->props.flags & XFRM_STATE_WILDRECV) &&
		    xfrm_state_addr_check(x, daddr, saddr, family) &&
		    mode == x->props.mode &&
		    proto == x->id.proto &&
		    x->km.state == XFRM_STATE_VALID) {
			rx = x;
			break;
		}
	}

	if (rx)
		xfrm_state_hold(rx);
	spin_unlock(&xfrm_state_lock);


	return rx;
}
EXPORT_SYMBOL(xfrm_stateonly_find);

static void __xfrm_state_insert(struct xfrm_state *x)
{
	struct net *net = xs_net(x);
	unsigned int h;

	list_add(&x->km.all, &net->xfrm.state_all);

	h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr,
			  x->props.reqid, x->props.family);
	hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);

	h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family);
	hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);

	if (x->id.spi) {
		h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto,
				  x->props.family);

		hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
	}

	tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
	if (x->replay_maxage)
		mod_timer(&x->rtimer, jiffies + x->replay_maxage);

	wake_up(&net->xfrm.km_waitq);

	net->xfrm.state_num++;

	xfrm_hash_grow_check(net, x->bydst.next != NULL);
}

/* xfrm_state_lock is held */
static void __xfrm_state_bump_genids(struct xfrm_state *xnew)
{
	struct net *net = xs_net(xnew);
	unsigned short family = xnew->props.family;
	u32 reqid = xnew->props.reqid;
	struct xfrm_state *x;
	struct hlist_node *entry;
	unsigned int h;
	u32 mark = xnew->mark.v & xnew->mark.m;

	h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family);
	hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
		if (x->props.family	== family &&
		    x->props.reqid	== reqid &&
		    (mark & x->mark.m) == x->mark.v &&
		    !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) &&
		    !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family))
			x->genid++;
	}
}

void xfrm_state_insert(struct xfrm_state *x)
{
	spin_lock_bh(&xfrm_state_lock);
	__xfrm_state_bump_genids(x);
	__xfrm_state_insert(x);
	spin_unlock_bh(&xfrm_state_lock);
}
EXPORT_SYMBOL(xfrm_state_insert);

/* xfrm_state_lock is held */
static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m,
					  unsigned short family, u8 mode,
					  u32 reqid, u8 proto,
					  const xfrm_address_t *daddr,
					  const xfrm_address_t *saddr, int create)
{
	unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family);
	struct hlist_node *entry;
	struct xfrm_state *x;
	u32 mark = m->v & m->m;

	hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) {
		if (x->props.reqid  != reqid ||
		    x->props.mode   != mode ||
		    x->props.family != family ||
		    x->km.state     != XFRM_STATE_ACQ ||
		    x->id.spi       != 0 ||
		    x->id.proto	    != proto ||
		    (mark & x->mark.m) != x->mark.v ||
		    xfrm_addr_cmp(&x->id.daddr, daddr, family) ||
		    xfrm_addr_cmp(&x->props.saddr, saddr, family))
			continue;

		xfrm_state_hold(x);
		return x;
	}

	if (!create)
		return NULL;

	x = xfrm_state_alloc(net);
	if (likely(x)) {
		switch (family) {
		case AF_INET:
			x->sel.daddr.a4 = daddr->a4;
			x->sel.saddr.a4 = saddr->a4;
			x->sel.prefixlen_d = 32;
			x->sel.prefixlen_s = 32;
			x->props.saddr.a4 = saddr->a4;
			x->id.daddr.a4 = daddr->a4;
			break;

		case AF_INET6:
			*(struct in6_addr *)x->sel.daddr.a6 = *(struct in6_addr *)daddr;
			*(struct in6_addr *)x->sel.saddr.a6 = *(struct in6_addr *)saddr;
			x->sel.prefixlen_d = 128;
			x->sel.prefixlen_s = 128;
			*(struct in6_addr *)x->props.saddr.a6 = *(struct in6_addr *)saddr;
			*(struct in6_addr *)x->id.daddr.a6 = *(struct in6_addr *)daddr;
			break;
		}

		x->km.state = XFRM_STATE_ACQ;
		x->id.proto = proto;
		x->props.family = family;
		x->props.mode = mode;
		x->props.reqid = reqid;
		x->mark.v = m->v;
		x->mark.m = m->m;
		x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires;
		xfrm_state_hold(x);
		tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL);
		list_add(&x->km.all, &net->xfrm.state_all);
		hlist_add_head(&x->bydst, net->xfrm.state_bydst+h);
		h = xfrm_src_hash(net, daddr, saddr, family);
		hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h);

		net->xfrm.state_num++;

		xfrm_hash_grow_check(net, x->bydst.next != NULL);
	}

	return x;
}

static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq);

int xfrm_state_add(struct xfrm_state *x)
{
	struct net *net = xs_net(x);
	struct xfrm_state *x1, *to_put;
	int family;
	int err;
	u32 mark = x->mark.v & x->mark.m;
	int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);

	family = x->props.family;

	to_put = NULL;

	spin_lock_bh(&xfrm_state_lock);

	x1 = __xfrm_state_locate(x, use_spi, family);
	if (x1) {
		to_put = x1;
		x1 = NULL;
		err = -EEXIST;
		goto out;
	}

	if (use_spi && x->km.seq) {
		x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq);
		if (x1 && ((x1->id.proto != x->id.proto) ||
		    xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) {
			to_put = x1;
			x1 = NULL;
		}
	}

	if (use_spi && !x1)
		x1 = __find_acq_core(net, &x->mark, family, x->props.mode,
				     x->props.reqid, x->id.proto,
				     &x->id.daddr, &x->props.saddr, 0);

	__xfrm_state_bump_genids(x);
	__xfrm_state_insert(x);
	err = 0;

out:
	spin_unlock_bh(&xfrm_state_lock);

	if (x1) {
		xfrm_state_delete(x1);
		xfrm_state_put(x1);
	}

	if (to_put)
		xfrm_state_put(to_put);

	return err;
}
EXPORT_SYMBOL(xfrm_state_add);

#ifdef CONFIG_XFRM_MIGRATE
static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp)
{
	struct net *net = xs_net(orig);
	int err = -ENOMEM;
	struct xfrm_state *x = xfrm_state_alloc(net);
	if (!x)
		goto out;

	memcpy(&x->id, &orig->id, sizeof(x->id));
	memcpy(&x->sel, &orig->sel, sizeof(x->sel));
	memcpy(&x->lft, &orig->lft, sizeof(x->lft));
	x->props.mode = orig->props.mode;
	x->props.replay_window = orig->props.replay_window;
	x->props.reqid = orig->props.reqid;
	x->props.family = orig->props.family;
	x->props.saddr = orig->props.saddr;

	if (orig->aalg) {
		x->aalg = xfrm_algo_auth_clone(orig->aalg);
		if (!x->aalg)
			goto error;
	}
	x->props.aalgo = orig->props.aalgo;

	if (orig->ealg) {
		x->ealg = xfrm_algo_clone(orig->ealg);
		if (!x->ealg)
			goto error;
	}
	x->props.ealgo = orig->props.ealgo;

	if (orig->calg) {
		x->calg = xfrm_algo_clone(orig->calg);
		if (!x->calg)
			goto error;
	}
	x->props.calgo = orig->props.calgo;

	if (orig->encap) {
		x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL);
		if (!x->encap)
			goto error;
	}

	if (orig->coaddr) {
		x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr),
				    GFP_KERNEL);
		if (!x->coaddr)
			goto error;
	}

	if (orig->replay_esn) {
		err = xfrm_replay_clone(x, orig);
		if (err)
			goto error;
	}

	memcpy(&x->mark, &orig->mark, sizeof(x->mark));

	err = xfrm_init_state(x);
	if (err)
		goto error;

	x->props.flags = orig->props.flags;

	x->curlft.add_time = orig->curlft.add_time;
	x->km.state = orig->km.state;
	x->km.seq = orig->km.seq;

	return x;

 error:
	xfrm_state_put(x);
out:
	if (errp)
		*errp = err;
	return NULL;
}

/* xfrm_state_lock is held */
struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m)
{
	unsigned int h;
	struct xfrm_state *x;
	struct hlist_node *entry;

	if (m->reqid) {
		h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr,
				  m->reqid, m->old_family);
		hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) {
			if (x->props.mode != m->mode ||
			    x->id.proto != m->proto)
				continue;
			if (m->reqid && x->props.reqid != m->reqid)
				continue;
			if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
					  m->old_family) ||
			    xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
					  m->old_family))
				continue;
			xfrm_state_hold(x);
			return x;
		}
	} else {
		h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr,
				  m->old_family);
		hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) {
			if (x->props.mode != m->mode ||
			    x->id.proto != m->proto)
				continue;
			if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr,
					  m->old_family) ||
			    xfrm_addr_cmp(&x->props.saddr, &m->old_saddr,
					  m->old_family))
				continue;
			xfrm_state_hold(x);
			return x;
		}
	}

	return NULL;
}
EXPORT_SYMBOL(xfrm_migrate_state_find);

struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x,
				       struct xfrm_migrate *m)
{
	struct xfrm_state *xc;
	int err;

	xc = xfrm_state_clone(x, &err);
	if (!xc)
		return NULL;

	memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr));
	memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr));

	/* add state */
	if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) {
		/* a care is needed when the destination address of the
		   state is to be updated as it is a part of triplet */
		xfrm_state_insert(xc);
	} else {
		if ((err = xfrm_state_add(xc)) < 0)
			goto error;
	}

	return xc;
error:
	xfrm_state_put(xc);
	return NULL;
}
EXPORT_SYMBOL(xfrm_state_migrate);
#endif

int xfrm_state_update(struct xfrm_state *x)
{
	struct xfrm_state *x1, *to_put;
	int err;
	int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY);

	to_put = NULL;

	spin_lock_bh(&xfrm_state_lock);
	x1 = __xfrm_state_locate(x, use_spi, x->props.family);

	err = -ESRCH;
	if (!x1)
		goto out;

	if (xfrm_state_kern(x1)) {
		to_put = x1;
		err = -EEXIST;
		goto out;
	}

	if (x1->km.state == XFRM_STATE_ACQ) {
		__xfrm_state_insert(x);
		x = NULL;
	}
	err = 0;

out:
	spin_unlock_bh(&xfrm_state_lock);

	if (to_put)
		xfrm_state_put(to_put);

	if (err)
		return err;

	if (!x) {
		xfrm_state_delete(x1);
		xfrm_state_put(x1);
		return 0;
	}

	err = -EINVAL;
	spin_lock_bh(&x1->lock);
	if (likely(x1->km.state == XFRM_STATE_VALID)) {
		if (x->encap && x1->encap)
			memcpy(x1->encap, x->encap, sizeof(*x1->encap));
		if (x->coaddr && x1->coaddr) {
			memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr));
		}
		if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel)))
			memcpy(&x1->sel, &x->sel, sizeof(x1->sel));
		memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
		x1->km.dying = 0;

		tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL);
		if (x1->curlft.use_time)
			xfrm_state_check_expire(x1);

		err = 0;
		x->km.state = XFRM_STATE_DEAD;
		__xfrm_state_put(x);
	}
	spin_unlock_bh(&x1->lock);

	xfrm_state_put(x1);

	return err;
}
EXPORT_SYMBOL(xfrm_state_update);

int xfrm_state_check_expire(struct xfrm_state *x)
{
	if (!x->curlft.use_time)
		x->curlft.use_time = get_seconds();

	if (x->km.state != XFRM_STATE_VALID)
		return -EINVAL;

	if (x->curlft.bytes >= x->lft.hard_byte_limit ||
	    x->curlft.packets >= x->lft.hard_packet_limit) {
		x->km.state = XFRM_STATE_EXPIRED;
		tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL);
		return -EINVAL;
	}

	if (!x->km.dying &&
	    (x->curlft.bytes >= x->lft.soft_byte_limit ||
	     x->curlft.packets >= x->lft.soft_packet_limit)) {
		x->km.dying = 1;
		km_state_expired(x, 0, 0);
	}
	return 0;
}
EXPORT_SYMBOL(xfrm_state_check_expire);

struct xfrm_state *
xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi,
		  u8 proto, unsigned short family)
{
	struct xfrm_state *x;

	spin_lock_bh(&xfrm_state_lock);
	x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family);
	spin_unlock_bh(&xfrm_state_lock);
	return x;
}
EXPORT_SYMBOL(xfrm_state_lookup);

struct xfrm_state *
xfrm_state_lookup_byaddr(struct net *net, u32 mark,
			 const xfrm_address_t *daddr, const xfrm_address_t *saddr,
			 u8 proto, unsigned short family)
{
	struct xfrm_state *x;

	spin_lock_bh(&xfrm_state_lock);
	x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family);
	spin_unlock_bh(&xfrm_state_lock);
	return x;
}
EXPORT_SYMBOL(xfrm_state_lookup_byaddr);

struct xfrm_state *
xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto,
	      const xfrm_address_t *daddr, const xfrm_address_t *saddr,
	      int create, unsigned short family)
{
	struct xfrm_state *x;

	spin_lock_bh(&xfrm_state_lock);
	x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create);
	spin_unlock_bh(&xfrm_state_lock);

	return x;
}
EXPORT_SYMBOL(xfrm_find_acq);

#ifdef CONFIG_XFRM_SUB_POLICY
int
xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n,
	       unsigned short family)
{
	int err = 0;
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	if (!afinfo)
		return -EAFNOSUPPORT;

	spin_lock_bh(&xfrm_state_lock);
	if (afinfo->tmpl_sort)
		err = afinfo->tmpl_sort(dst, src, n);
	spin_unlock_bh(&xfrm_state_lock);
	xfrm_state_put_afinfo(afinfo);
	return err;
}
EXPORT_SYMBOL(xfrm_tmpl_sort);

int
xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n,
		unsigned short family)
{
	int err = 0;
	struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family);
	if (!afinfo)
		return -EAFNOSUPPORT;

	spin_lock_bh(&xfrm_state_lock);
	if (afinfo->state_sort)
		err = afinfo->state_sort(dst, src, n);
	spin_unlock_bh(&xfrm_state_lock);
	xfrm_state_put_afinfo(afinfo);
	return err;
}
EXPORT_SYMBOL(xfrm_state_sort);
#endif

/* Silly enough, but I'm lazy to build resolution list */

static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
{
	int i;

	for (i = 0; i <= net->xfrm.state_hmask; i++) {
		struct hlist_node *entry;
		struct xfrm_state *x;

		hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) {
			if (x->km.seq == seq &&
			    (mark & x->mark.m) == x->mark.v &&
			    x->km.state == XFRM_STATE_ACQ) {
				xfrm_state_hold(x);
				return x;
			}
		}
	}
	return NULL;
}

struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq)
{
	struct xfrm_state *x;

	spin_lock_bh(&xfrm_state_lock);
	x = __xfrm_find_acq_byseq(net, mark, seq);
	spin_unlock_bh(&xfrm_state_lock);
	return x;
}
EXPORT_SYMBOL(xfrm_find_acq_byseq);

u32 xfrm_get_acqseq(void)
{
	u32 res;
	static atomic_t acqseq;

	do {
		res = atomic_inc_return(&acqseq);
	} while (!res);

	return res;
}
EXPORT_SYMBOL(xfrm_get_acqseq);

int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high)
{
	struct net *net = xs_net(x);
	unsigned int h;
	struct xfrm_state *x0;
	int err = -ENOENT;
	__be32 minspi = htonl(low);
	__be32 maxspi = htonl(high);
	u32 mark = x->mark.v & x->mark.m;

	spin_lock_bh(&x->lock);
	if (x->km.state == XFRM_STATE_DEAD)
		goto unlock;

	err = 0;
	if (x->id.spi)
		goto unlock;

	err = -ENOENT;

	if (minspi == maxspi) {
		x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family);
		if (x0) {
			xfrm_state_put(x0);
			goto unlock;
		}
		x->id.spi = minspi;
	} else {
		u32 spi = 0;
		for (h=0; h<high-low+1; h++) {
			spi = low + net_random()%(high-low+1);
			x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family);
			if (x0 == NULL) {
				x->id.spi = htonl(spi);
				break;
			}
			xfrm_state_put(x0);
		}
	}
	if (x->id.spi) {
		spin_lock_bh(&xfrm_state_lock);
		h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family);
		hlist_add_head(&x->byspi, net->xfrm.state_byspi+h);
		spin_unlock_bh(&xfrm_state_lock);

		err = 0;
	}

unlock:
	spin_unlock_bh(&x->lock);

	return err;
}
EXPORT_SYMBOL(xfrm_alloc_spi);

int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk,
		    int (*func)(struct xfrm_state *, int, void*),
		    void *data)
{
	struct xfrm_state *state;
	struct xfrm_state_walk *x;
	int err = 0;

	if (walk->seq != 0 && list_empty(&walk->all))
		return 0;

	spin_lock_bh(&xfrm_state_lock);
	if (list_empty(&walk->all))
		x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all);
	else
		x = list_entry(&walk->all, struct xfrm_state_walk, all);
	list_for_each_entry_from(x, &net->xfrm.state_all, all) {
		if (x->state == XFRM_STATE_DEAD)
			continue;
		state = container_of(x, struct xfrm_state, km);
		if (!xfrm_id_proto_match(state->id.proto, walk->proto))
			continue;
		err = func(state, walk->seq, data);
		if (err) {
			list_move_tail(&walk->all, &x->all);
			goto out;
		}
		walk->seq++;
	}
	if (walk->seq == 0) {
		err = -ENOENT;
		goto out;
	}
	list_del_init(&walk->all);
out:
	spin_unlock_bh(&xfrm_state_lock);
	return err;
}
EXPORT_SYMBOL(xfrm_state_walk);

void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto)
{
	INIT_LIST_HEAD(&walk->all);
	walk->proto = proto;
	walk->state = XFRM_STATE_DEAD;
	walk->seq = 0;
}
EXPORT_SYMBOL(xfrm_state_walk_init);

void xfrm_state_walk_done(struct xfrm_state_walk *walk)
{
	if (list_empty(&walk->all))
		return;

	spin_lock_bh(&xfrm_state_lock);
	list_del(&walk->all);
	spin_unlock_bh(&xfrm_state_lock);
}
EXPORT_SYMBOL(xfrm_state_walk_done);

static void xfrm_replay_timer_handler(unsigned long data)
{
	struct xfrm_state *x = (struct xfrm_state*)data;

	spin_lock(&x->lock);

	if (x->km.state == XFRM_STATE_VALID) {
		if (xfrm_aevent_is_on(xs_net(x)))
			x->repl->notify(x, XFRM_REPLAY_TIMEOUT);
		else
			x->xflags |= XFRM_TIME_DEFER;
	}

	spin_unlock(&x->lock);
}

static LIST_HEAD(xfrm_km_list);
static DEFINE_RWLOCK(xfrm_km_lock);

void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c)
{
	struct xfrm_mgr *km;

	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list)
		if (km->notify_policy)
			km->notify_policy(xp, dir, c);
	read_unlock(&xfrm_km_lock);
}

void km_state_notify(struct xfrm_state *x, const struct km_event *c)
{
	struct xfrm_mgr *km;
	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list)
		if (km->notify)
			km->notify(x, c);
	read_unlock(&xfrm_km_lock);
}

EXPORT_SYMBOL(km_policy_notify);
EXPORT_SYMBOL(km_state_notify);

void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
{
	struct net *net = xs_net(x);
	struct km_event c;

	c.data.hard = hard;
	c.pid = pid;
	c.event = XFRM_MSG_EXPIRE;
	km_state_notify(x, &c);

	if (hard)
		wake_up(&net->xfrm.km_waitq);
}

EXPORT_SYMBOL(km_state_expired);
/*
 * We send to all registered managers regardless of failure
 * We are happy with one success
*/
int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
{
	int err = -EINVAL, acqret;
	struct xfrm_mgr *km;

	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list) {
		acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
		if (!acqret)
			err = acqret;
	}
	read_unlock(&xfrm_km_lock);
	return err;
}
EXPORT_SYMBOL(km_query);

int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport)
{
	int err = -EINVAL;
	struct xfrm_mgr *km;

	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list) {
		if (km->new_mapping)
			err = km->new_mapping(x, ipaddr, sport);
		if (!err)
			break;
	}
	read_unlock(&xfrm_km_lock);
	return err;
}
EXPORT_SYMBOL(km_new_mapping);

void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
{
	struct net *net = xp_net(pol);
	struct km_event c;

	c.data.hard = hard;
	c.pid = pid;
	c.event = XFRM_MSG_POLEXPIRE;
	km_policy_notify(pol, dir, &c);

	if (hard)
		wake_up(&net->xfrm.km_waitq);
}
EXPORT_SYMBOL(km_policy_expired);

#ifdef CONFIG_XFRM_MIGRATE
int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type,
	       const struct xfrm_migrate *m, int num_migrate,
	       const struct xfrm_kmaddress *k)
{
	int err = -EINVAL;
	int ret;
	struct xfrm_mgr *km;

	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list) {
		if (km->migrate) {
			ret = km->migrate(sel, dir, type, m, num_migrate, k);
			if (!ret)
				err = ret;
		}
	}
	read_unlock(&xfrm_km_lock);
	return err;
}
EXPORT_SYMBOL(km_migrate);
#endif

int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr)
{
	int err = -EINVAL;
	int ret;
	struct xfrm_mgr *km;

	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list) {
		if (km->report) {
			ret = km->report(net, proto, sel, addr);
			if (!ret)
				err = ret;
		}
	}
	read_unlock(&xfrm_km_lock);
	return err;
}
EXPORT_SYMBOL(km_report);

int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
{
	int err;
	u8 *data;
	struct xfrm_mgr *km;
	struct xfrm_policy *pol = NULL;

	if (optlen <= 0 || optlen > PAGE_SIZE)
		return -EMSGSIZE;

	data = kmalloc(optlen, GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	err = -EFAULT;
	if (copy_from_user(data, optval, optlen))
		goto out;

	err = -EINVAL;
	read_lock(&xfrm_km_lock);
	list_for_each_entry(km, &xfrm_km_list, list) {
		pol = km->compile_policy(sk, optname, data,
					 optlen, &err);
		if (err >= 0)
			break;
	}
	read_unlock(&xfrm_km_lock);

	if (err >= 0) {
		xfrm_sk_policy_insert(sk, err, pol);
		xfrm_pol_put(pol);
		err = 0;
	}

out:
	kfree(data);
	return err;
}
EXPORT_SYMBOL(xfrm_user_policy);

int xfrm_register_km(struct xfrm_mgr *km)
{
	write_lock_bh(&xfrm_km_lock);
	list_add_tail(&km->list, &xfrm_km_list);
	write_unlock_bh(&xfrm_km_lock);
	return 0;
}
EXPORT_SYMBOL(xfrm_register_km);

int xfrm_unregister_km(struct xfrm_mgr *km)
{
	write_lock_bh(&xfrm_km_lock);
	list_del(&km->list);
	write_unlock_bh(&xfrm_km_lock);
	return 0;
}
EXPORT_SYMBOL(xfrm_unregister_km);

int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
{
	int err = 0;
	if (unlikely(afinfo == NULL))
		return -EINVAL;
	if (unlikely(afinfo->family >= NPROTO))
		return -EAFNOSUPPORT;
	write_lock_bh(&xfrm_state_afinfo_lock);
	if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
		err = -ENOBUFS;
	else
		xfrm_state_afinfo[afinfo->family] = afinfo;
	write_unlock_bh(&xfrm_state_afinfo_lock);
	return err;
}
EXPORT_SYMBOL(xfrm_state_register_afinfo);

int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
{
	int err = 0;
	if (unlikely(afinfo == NULL))
		return -EINVAL;
	if (unlikely(afinfo->family >= NPROTO))
		return -EAFNOSUPPORT;
	write_lock_bh(&xfrm_state_afinfo_lock);
	if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
		if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
			err = -EINVAL;
		else
			xfrm_state_afinfo[afinfo->family] = NULL;
	}
	write_unlock_bh(&xfrm_state_afinfo_lock);
	return err;
}
EXPORT_SYMBOL(xfrm_state_unregister_afinfo);

static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family)
{
	struct xfrm_state_afinfo *afinfo;
	if (unlikely(family >= NPROTO))
		return NULL;
	read_lock(&xfrm_state_afinfo_lock);
	afinfo = xfrm_state_afinfo[family];
	if (unlikely(!afinfo))
		read_unlock(&xfrm_state_afinfo_lock);
	return afinfo;
}

static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
	__releases(xfrm_state_afinfo_lock)
{
	read_unlock(&xfrm_state_afinfo_lock);
}

/* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */
void xfrm_state_delete_tunnel(struct xfrm_state *x)
{
	if (x->tunnel) {
		struct xfrm_state *t = x->tunnel;

		if (atomic_read(&t->tunnel_users) == 2)
			xfrm_state_delete(t);
		atomic_dec(&t->tunnel_users);
		xfrm_state_put(t);
		x->tunnel = NULL;
	}
}
EXPORT_SYMBOL(xfrm_state_delete_tunnel);

int xfrm_state_mtu(struct xfrm_state *x, int mtu)
{
	int res;

	spin_lock_bh(&x->lock);
	if (x->km.state == XFRM_STATE_VALID &&
	    x->type && x->type->get_mtu)
		res = x->type->get_mtu(x, mtu);
	else
		res = mtu - x->props.header_len;
	spin_unlock_bh(&x->lock);
	return res;
}

int __xfrm_init_state(struct xfrm_state *x, bool init_replay)
{
	struct xfrm_state_afinfo *afinfo;
	struct xfrm_mode *inner_mode;
	int family = x->props.family;
	int err;

	err = -EAFNOSUPPORT;
	afinfo = xfrm_state_get_afinfo(family);
	if (!afinfo)
		goto error;

	err = 0;
	if (afinfo->init_flags)
		err = afinfo->init_flags(x);

	xfrm_state_put_afinfo(afinfo);

	if (err)
		goto error;

	err = -EPROTONOSUPPORT;

	if (x->sel.family != AF_UNSPEC) {
		inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
		if (inner_mode == NULL)
			goto error;

		if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
		    family != x->sel.family) {
			xfrm_put_mode(inner_mode);
			goto error;
		}

		x->inner_mode = inner_mode;
	} else {
		struct xfrm_mode *inner_mode_iaf;
		int iafamily = AF_INET;

		inner_mode = xfrm_get_mode(x->props.mode, x->props.family);
		if (inner_mode == NULL)
			goto error;

		if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
			xfrm_put_mode(inner_mode);
			goto error;
		}
		x->inner_mode = inner_mode;

		if (x->props.family == AF_INET)
			iafamily = AF_INET6;

		inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily);
		if (inner_mode_iaf) {
			if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)
				x->inner_mode_iaf = inner_mode_iaf;
			else
				xfrm_put_mode(inner_mode_iaf);
		}
	}

	x->type = xfrm_get_type(x->id.proto, family);
	if (x->type == NULL)
		goto error;

	err = x->type->init_state(x);
	if (err)
		goto error;

	x->outer_mode = xfrm_get_mode(x->props.mode, family);
	if (x->outer_mode == NULL) {
		err = -EPROTONOSUPPORT;
		goto error;
	}

	if (init_replay) {
		err = xfrm_init_replay(x);
		if (err)
			goto error;
	}

	x->km.state = XFRM_STATE_VALID;

error:
	return err;
}

EXPORT_SYMBOL(__xfrm_init_state);

int xfrm_init_state(struct xfrm_state *x)
{
	return __xfrm_init_state(x, true);
}

EXPORT_SYMBOL(xfrm_init_state);

int __net_init xfrm_state_init(struct net *net)
{
	unsigned int sz;

	INIT_LIST_HEAD(&net->xfrm.state_all);

	sz = sizeof(struct hlist_head) * 8;

	net->xfrm.state_bydst = xfrm_hash_alloc(sz);
	if (!net->xfrm.state_bydst)
		goto out_bydst;
	net->xfrm.state_bysrc = xfrm_hash_alloc(sz);
	if (!net->xfrm.state_bysrc)
		goto out_bysrc;
	net->xfrm.state_byspi = xfrm_hash_alloc(sz);
	if (!net->xfrm.state_byspi)
		goto out_byspi;
	net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1);

	net->xfrm.state_num = 0;
	INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize);
	INIT_HLIST_HEAD(&net->xfrm.state_gc_list);
	INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task);
	init_waitqueue_head(&net->xfrm.km_waitq);
	return 0;

out_byspi:
	xfrm_hash_free(net->xfrm.state_bysrc, sz);
out_bysrc:
	xfrm_hash_free(net->xfrm.state_bydst, sz);
out_bydst:
	return -ENOMEM;
}

void xfrm_state_fini(struct net *net)
{
	struct xfrm_audit audit_info;
	unsigned int sz;

	flush_work(&net->xfrm.state_hash_work);
	audit_info.loginuid = -1;
	audit_info.sessionid = -1;
	audit_info.secid = 0;
	xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info);
	flush_work(&net->xfrm.state_gc_work);

	WARN_ON(!list_empty(&net->xfrm.state_all));

	sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head);
	WARN_ON(!hlist_empty(net->xfrm.state_byspi));
	xfrm_hash_free(net->xfrm.state_byspi, sz);
	WARN_ON(!hlist_empty(net->xfrm.state_bysrc));
	xfrm_hash_free(net->xfrm.state_bysrc, sz);
	WARN_ON(!hlist_empty(net->xfrm.state_bydst));
	xfrm_hash_free(net->xfrm.state_bydst, sz);
}

#ifdef CONFIG_AUDITSYSCALL
static void xfrm_audit_helper_sainfo(struct xfrm_state *x,
				     struct audit_buffer *audit_buf)
{
	struct xfrm_sec_ctx *ctx = x->security;
	u32 spi = ntohl(x->id.spi);

	if (ctx)
		audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s",
				 ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str);

	switch(x->props.family) {
	case AF_INET:
		audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
				 &x->props.saddr.a4, &x->id.daddr.a4);
		break;
	case AF_INET6:
		audit_log_format(audit_buf, " src=%pI6 dst=%pI6",
				 x->props.saddr.a6, x->id.daddr.a6);
		break;
	}

	audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
}

static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family,
				      struct audit_buffer *audit_buf)
{
	const struct iphdr *iph4;
	const struct ipv6hdr *iph6;

	switch (family) {
	case AF_INET:
		iph4 = ip_hdr(skb);
		audit_log_format(audit_buf, " src=%pI4 dst=%pI4",
				 &iph4->saddr, &iph4->daddr);
		break;
	case AF_INET6:
		iph6 = ipv6_hdr(skb);
		audit_log_format(audit_buf,
				 " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x",
				 &iph6->saddr,&iph6->daddr,
				 iph6->flow_lbl[0] & 0x0f,
				 iph6->flow_lbl[1],
				 iph6->flow_lbl[2]);
		break;
	}
}

void xfrm_audit_state_add(struct xfrm_state *x, int result,
			  uid_t auid, u32 sessionid, u32 secid)
{
	struct audit_buffer *audit_buf;

	audit_buf = xfrm_audit_start("SAD-add");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
	xfrm_audit_helper_sainfo(x, audit_buf);
	audit_log_format(audit_buf, " res=%u", result);
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_add);

void xfrm_audit_state_delete(struct xfrm_state *x, int result,
			     uid_t auid, u32 sessionid, u32 secid)
{
	struct audit_buffer *audit_buf;

	audit_buf = xfrm_audit_start("SAD-delete");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
	xfrm_audit_helper_sainfo(x, audit_buf);
	audit_log_format(audit_buf, " res=%u", result);
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_delete);

void xfrm_audit_state_replay_overflow(struct xfrm_state *x,
				      struct sk_buff *skb)
{
	struct audit_buffer *audit_buf;
	u32 spi;

	audit_buf = xfrm_audit_start("SA-replay-overflow");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
	/* don't record the sequence number because it's inherent in this kind
	 * of audit message */
	spi = ntohl(x->id.spi);
	audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi);
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow);

void xfrm_audit_state_replay(struct xfrm_state *x,
			     struct sk_buff *skb, __be32 net_seq)
{
	struct audit_buffer *audit_buf;
	u32 spi;

	audit_buf = xfrm_audit_start("SA-replayed-pkt");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
	spi = ntohl(x->id.spi);
	audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
			 spi, spi, ntohl(net_seq));
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_replay);

void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family)
{
	struct audit_buffer *audit_buf;

	audit_buf = xfrm_audit_start("SA-notfound");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, family, audit_buf);
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple);

void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family,
			       __be32 net_spi, __be32 net_seq)
{
	struct audit_buffer *audit_buf;
	u32 spi;

	audit_buf = xfrm_audit_start("SA-notfound");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, family, audit_buf);
	spi = ntohl(net_spi);
	audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
			 spi, spi, ntohl(net_seq));
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound);

void xfrm_audit_state_icvfail(struct xfrm_state *x,
			      struct sk_buff *skb, u8 proto)
{
	struct audit_buffer *audit_buf;
	__be32 net_spi;
	__be32 net_seq;

	audit_buf = xfrm_audit_start("SA-icv-failure");
	if (audit_buf == NULL)
		return;
	xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf);
	if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) {
		u32 spi = ntohl(net_spi);
		audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u",
				 spi, spi, ntohl(net_seq));
	}
	audit_log_end(audit_buf);
}
EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail);
#endif /* CONFIG_AUDITSYSCALL */