Revision df30f7408b187929dbde72661c7f7c615268f1d0 authored by pravin shelar on 26 December 2016, 16:31:27 UTC, committed by David S. Miller on 27 December 2016, 17:28:07 UTC
Networking stack accelerate vlan tag handling by keeping topmost vlan header in skb. This works as long as packet remains in OVS datapath. But during OVS upcall vlan header is pushed on to the packet. When such packet is sent back to OVS datapath, core networking stack might not handle it correctly. Following patch avoids this issue by accelerating the vlan tag during flow key extract. This simplifies datapath by bringing uniform packet processing for packets from all code paths. Fixes: 5108bbaddc ("openvswitch: add processing of L3 packets"). CC: Jarno Rajahalme <jarno@ovn.org> CC: Jiri Benc <jbenc@redhat.com> Signed-off-by: Pravin B Shelar <pshelar@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 56ab6b9
reset.h
#ifndef _LINUX_RESET_H_
#define _LINUX_RESET_H_
#include <linux/device.h>
struct reset_control;
#ifdef CONFIG_RESET_CONTROLLER
int reset_control_reset(struct reset_control *rstc);
int reset_control_assert(struct reset_control *rstc);
int reset_control_deassert(struct reset_control *rstc);
int reset_control_status(struct reset_control *rstc);
struct reset_control *__of_reset_control_get(struct device_node *node,
const char *id, int index, int shared);
void reset_control_put(struct reset_control *rstc);
struct reset_control *__devm_reset_control_get(struct device *dev,
const char *id, int index, int shared);
int __must_check device_reset(struct device *dev);
static inline int device_reset_optional(struct device *dev)
{
return device_reset(dev);
}
#else
static inline int reset_control_reset(struct reset_control *rstc)
{
WARN_ON(1);
return 0;
}
static inline int reset_control_assert(struct reset_control *rstc)
{
WARN_ON(1);
return 0;
}
static inline int reset_control_deassert(struct reset_control *rstc)
{
WARN_ON(1);
return 0;
}
static inline int reset_control_status(struct reset_control *rstc)
{
WARN_ON(1);
return 0;
}
static inline void reset_control_put(struct reset_control *rstc)
{
WARN_ON(1);
}
static inline int __must_check device_reset(struct device *dev)
{
WARN_ON(1);
return -ENOTSUPP;
}
static inline int device_reset_optional(struct device *dev)
{
return -ENOTSUPP;
}
static inline struct reset_control *__of_reset_control_get(
struct device_node *node,
const char *id, int index, int shared)
{
return ERR_PTR(-ENOTSUPP);
}
static inline struct reset_control *__devm_reset_control_get(
struct device *dev,
const char *id, int index, int shared)
{
return ERR_PTR(-ENOTSUPP);
}
#endif /* CONFIG_RESET_CONTROLLER */
/**
* reset_control_get_exclusive - Lookup and obtain an exclusive reference
* to a reset controller.
* @dev: device to be reset by the controller
* @id: reset line name
*
* Returns a struct reset_control or IS_ERR() condition containing errno.
* If this function is called more then once for the same reset_control it will
* return -EBUSY.
*
* See reset_control_get_shared for details on shared references to
* reset-controls.
*
* Use of id names is optional.
*/
static inline struct reset_control *
__must_check reset_control_get_exclusive(struct device *dev, const char *id)
{
#ifndef CONFIG_RESET_CONTROLLER
WARN_ON(1);
#endif
return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 0);
}
/**
* reset_control_get_shared - Lookup and obtain a shared reference to a
* reset controller.
* @dev: device to be reset by the controller
* @id: reset line name
*
* Returns a struct reset_control or IS_ERR() condition containing errno.
* This function is intended for use with reset-controls which are shared
* between hardware-blocks.
*
* When a reset-control is shared, the behavior of reset_control_assert /
* deassert is changed, the reset-core will keep track of a deassert_count
* and only (re-)assert the reset after reset_control_assert has been called
* as many times as reset_control_deassert was called. Also see the remark
* about shared reset-controls in the reset_control_assert docs.
*
* Calling reset_control_assert without first calling reset_control_deassert
* is not allowed on a shared reset control. Calling reset_control_reset is
* also not allowed on a shared reset control.
*
* Use of id names is optional.
*/
static inline struct reset_control *reset_control_get_shared(
struct device *dev, const char *id)
{
return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 1);
}
static inline struct reset_control *reset_control_get_optional_exclusive(
struct device *dev, const char *id)
{
return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 0);
}
static inline struct reset_control *reset_control_get_optional_shared(
struct device *dev, const char *id)
{
return __of_reset_control_get(dev ? dev->of_node : NULL, id, 0, 1);
}
/**
* of_reset_control_get_exclusive - Lookup and obtain an exclusive reference
* to a reset controller.
* @node: device to be reset by the controller
* @id: reset line name
*
* Returns a struct reset_control or IS_ERR() condition containing errno.
*
* Use of id names is optional.
*/
static inline struct reset_control *of_reset_control_get_exclusive(
struct device_node *node, const char *id)
{
return __of_reset_control_get(node, id, 0, 0);
}
/**
* of_reset_control_get_shared - Lookup and obtain an shared reference
* to a reset controller.
* @node: device to be reset by the controller
* @id: reset line name
*
* When a reset-control is shared, the behavior of reset_control_assert /
* deassert is changed, the reset-core will keep track of a deassert_count
* and only (re-)assert the reset after reset_control_assert has been called
* as many times as reset_control_deassert was called. Also see the remark
* about shared reset-controls in the reset_control_assert docs.
*
* Calling reset_control_assert without first calling reset_control_deassert
* is not allowed on a shared reset control. Calling reset_control_reset is
* also not allowed on a shared reset control.
* Returns a struct reset_control or IS_ERR() condition containing errno.
*
* Use of id names is optional.
*/
static inline struct reset_control *of_reset_control_get_shared(
struct device_node *node, const char *id)
{
return __of_reset_control_get(node, id, 0, 1);
}
/**
* of_reset_control_get_exclusive_by_index - Lookup and obtain an exclusive
* reference to a reset controller
* by index.
* @node: device to be reset by the controller
* @index: index of the reset controller
*
* This is to be used to perform a list of resets for a device or power domain
* in whatever order. Returns a struct reset_control or IS_ERR() condition
* containing errno.
*/
static inline struct reset_control *of_reset_control_get_exclusive_by_index(
struct device_node *node, int index)
{
return __of_reset_control_get(node, NULL, index, 0);
}
/**
* of_reset_control_get_shared_by_index - Lookup and obtain an shared
* reference to a reset controller
* by index.
* @node: device to be reset by the controller
* @index: index of the reset controller
*
* When a reset-control is shared, the behavior of reset_control_assert /
* deassert is changed, the reset-core will keep track of a deassert_count
* and only (re-)assert the reset after reset_control_assert has been called
* as many times as reset_control_deassert was called. Also see the remark
* about shared reset-controls in the reset_control_assert docs.
*
* Calling reset_control_assert without first calling reset_control_deassert
* is not allowed on a shared reset control. Calling reset_control_reset is
* also not allowed on a shared reset control.
* Returns a struct reset_control or IS_ERR() condition containing errno.
*
* This is to be used to perform a list of resets for a device or power domain
* in whatever order. Returns a struct reset_control or IS_ERR() condition
* containing errno.
*/
static inline struct reset_control *of_reset_control_get_shared_by_index(
struct device_node *node, int index)
{
return __of_reset_control_get(node, NULL, index, 1);
}
/**
* devm_reset_control_get_exclusive - resource managed
* reset_control_get_exclusive()
* @dev: device to be reset by the controller
* @id: reset line name
*
* Managed reset_control_get_exclusive(). For reset controllers returned
* from this function, reset_control_put() is called automatically on driver
* detach.
*
* See reset_control_get_exclusive() for more information.
*/
static inline struct reset_control *
__must_check devm_reset_control_get_exclusive(struct device *dev,
const char *id)
{
#ifndef CONFIG_RESET_CONTROLLER
WARN_ON(1);
#endif
return __devm_reset_control_get(dev, id, 0, 0);
}
/**
* devm_reset_control_get_shared - resource managed reset_control_get_shared()
* @dev: device to be reset by the controller
* @id: reset line name
*
* Managed reset_control_get_shared(). For reset controllers returned from
* this function, reset_control_put() is called automatically on driver detach.
* See reset_control_get_shared() for more information.
*/
static inline struct reset_control *devm_reset_control_get_shared(
struct device *dev, const char *id)
{
return __devm_reset_control_get(dev, id, 0, 1);
}
static inline struct reset_control *devm_reset_control_get_optional_exclusive(
struct device *dev, const char *id)
{
return __devm_reset_control_get(dev, id, 0, 0);
}
static inline struct reset_control *devm_reset_control_get_optional_shared(
struct device *dev, const char *id)
{
return __devm_reset_control_get(dev, id, 0, 1);
}
/**
* devm_reset_control_get_exclusive_by_index - resource managed
* reset_control_get_exclusive()
* @dev: device to be reset by the controller
* @index: index of the reset controller
*
* Managed reset_control_get_exclusive(). For reset controllers returned from
* this function, reset_control_put() is called automatically on driver
* detach.
*
* See reset_control_get_exclusive() for more information.
*/
static inline struct reset_control *
devm_reset_control_get_exclusive_by_index(struct device *dev, int index)
{
return __devm_reset_control_get(dev, NULL, index, 0);
}
/**
* devm_reset_control_get_shared_by_index - resource managed
* reset_control_get_shared
* @dev: device to be reset by the controller
* @index: index of the reset controller
*
* Managed reset_control_get_shared(). For reset controllers returned from
* this function, reset_control_put() is called automatically on driver detach.
* See reset_control_get_shared() for more information.
*/
static inline struct reset_control *
devm_reset_control_get_shared_by_index(struct device *dev, int index)
{
return __devm_reset_control_get(dev, NULL, index, 1);
}
/*
* TEMPORARY calls to use during transition:
*
* of_reset_control_get() => of_reset_control_get_exclusive()
*
* These inline function calls will be removed once all consumers
* have been moved over to the new explicit API.
*/
static inline struct reset_control *reset_control_get(
struct device *dev, const char *id)
{
return reset_control_get_exclusive(dev, id);
}
static inline struct reset_control *reset_control_get_optional(
struct device *dev, const char *id)
{
return reset_control_get_optional_exclusive(dev, id);
}
static inline struct reset_control *of_reset_control_get(
struct device_node *node, const char *id)
{
return of_reset_control_get_exclusive(node, id);
}
static inline struct reset_control *of_reset_control_get_by_index(
struct device_node *node, int index)
{
return of_reset_control_get_exclusive_by_index(node, index);
}
static inline struct reset_control *devm_reset_control_get(
struct device *dev, const char *id)
{
return devm_reset_control_get_exclusive(dev, id);
}
static inline struct reset_control *devm_reset_control_get_optional(
struct device *dev, const char *id)
{
return devm_reset_control_get_optional_exclusive(dev, id);
}
static inline struct reset_control *devm_reset_control_get_by_index(
struct device *dev, int index)
{
return devm_reset_control_get_exclusive_by_index(dev, index);
}
#endif
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