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Commit bfcd3a46 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
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Introduce devlink infrastructure 



Introduce devlink infrastructure for drivers to register and expose to
userspace via generic Netlink interface.

There are two basic objects defined:
devlink - one instance for every "parent device", for example switch ASIC
devlink port - one instance for every physical port of the device.

This initial portion implements basic get/dump of objects to userspace.
Also, port splitter and port type setting is implemented.

Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bd070e21

MAINTAINERS

+8 −0
Original line number Original line Diff line number Diff line
@@ -3499,6 +3499,14 @@ F: include/linux/device-mapper.h 
F:	include/linux/dm-*.h

F:	include/linux/dm-*.h

F:	include/uapi/linux/dm-*.h

F:	include/uapi/linux/dm-*.h





DEVLINK

M:	Jiri Pirko <jiri@mellanox.com>

L:	netdev@vger.kernel.org

S:	Supported

F:	net/core/devlink.c

F:	include/net/devlink.h

F:	include/uapi/linux/devlink.h



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W:	http://www.dialog-semiconductor.com/products

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include/net/devlink.h

0 → 100644
+140 −0
Original line number Original line Diff line number Diff line 
/*

 * include/net/devlink.h - Network physical device Netlink interface

 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.

 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.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; either version 2 of the License, or

 * (at your option) any later version.

 */

#ifndef _NET_DEVLINK_H_

#define _NET_DEVLINK_H_



#include <linux/device.h>

#include <linux/slab.h>

#include <linux/gfp.h>

#include <linux/list.h>

#include <linux/netdevice.h>

#include <net/net_namespace.h>

#include <uapi/linux/devlink.h>



struct devlink_ops;



struct devlink {

	struct list_head list;

	struct list_head port_list;

	const struct devlink_ops *ops;

	struct device *dev;

	possible_net_t _net;

	char priv[0] __aligned(NETDEV_ALIGN);

};



struct devlink_port {

	struct list_head list;

	struct devlink *devlink;

	unsigned index;

	bool registered;

	enum devlink_port_type type;

	enum devlink_port_type desired_type;

	void *type_dev;

	bool split;

	u32 split_group;

};



struct devlink_ops {

	size_t priv_size;

	int (*port_type_set)(struct devlink_port *devlink_port,

			     enum devlink_port_type port_type);

	int (*port_split)(struct devlink *devlink, unsigned int port_index,

			  unsigned int count);

	int (*port_unsplit)(struct devlink *devlink, unsigned int port_index);

};



static inline void *devlink_priv(struct devlink *devlink)

{

	BUG_ON(!devlink);

	return &devlink->priv;

}



static inline struct devlink *priv_to_devlink(void *priv)

{

	BUG_ON(!priv);

	return container_of(priv, struct devlink, priv);

}



struct ib_device;



#if IS_ENABLED(CONFIG_NET_DEVLINK)



struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size);

int devlink_register(struct devlink *devlink, struct device *dev);

void devlink_unregister(struct devlink *devlink);

void devlink_free(struct devlink *devlink);

int devlink_port_register(struct devlink *devlink,

			  struct devlink_port *devlink_port,

			  unsigned int port_index);

void devlink_port_unregister(struct devlink_port *devlink_port);

void devlink_port_type_eth_set(struct devlink_port *devlink_port,

			       struct net_device *netdev);

void devlink_port_type_ib_set(struct devlink_port *devlink_port,

			      struct ib_device *ibdev);

void devlink_port_type_clear(struct devlink_port *devlink_port);

void devlink_port_split_set(struct devlink_port *devlink_port,

			    u32 split_group);



#else



static inline struct devlink *devlink_alloc(const struct devlink_ops *ops,

					    size_t priv_size)

{

	return kzalloc(sizeof(struct devlink) + priv_size, GFP_KERNEL);

}



static inline int devlink_register(struct devlink *devlink, struct device *dev)

{

	return 0;

}



static inline void devlink_unregister(struct devlink *devlink)

{

}



static inline void devlink_free(struct devlink *devlink)

{

	kfree(devlink);

}



static inline int devlink_port_register(struct devlink *devlink,

					struct devlink_port *devlink_port,

					unsigned int port_index)

{

	return 0;

}



static inline void devlink_port_unregister(struct devlink_port *devlink_port)

{

}



static inline void devlink_port_type_eth_set(struct devlink_port *devlink_port,

					     struct net_device *netdev)

{

}



static inline void devlink_port_type_ib_set(struct devlink_port *devlink_port,

					    struct ib_device *ibdev)

{

}



static inline void devlink_port_type_clear(struct devlink_port *devlink_port)

{

}



static inline void devlink_port_split_set(struct devlink_port *devlink_port,

					  u32 split_group)

{

}



#endif



#endif /* _NET_DEVLINK_H_ */

include/uapi/linux/devlink.h

0 → 100644
+72 −0
Original line number Original line Diff line number Diff line 
/*

 * include/uapi/linux/devlink.h - Network physical device Netlink interface

 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.

 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.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; either version 2 of the License, or

 * (at your option) any later version.

 */



#ifndef _UAPI_LINUX_DEVLINK_H_

#define _UAPI_LINUX_DEVLINK_H_



#define DEVLINK_GENL_NAME "devlink"

#define DEVLINK_GENL_VERSION 0x1

#define DEVLINK_GENL_MCGRP_CONFIG_NAME "config"



enum devlink_command {

	/* don't change the order or add anything between, this is ABI! */

	DEVLINK_CMD_UNSPEC,



	DEVLINK_CMD_GET,		/* can dump */

	DEVLINK_CMD_SET,

	DEVLINK_CMD_NEW,

	DEVLINK_CMD_DEL,



	DEVLINK_CMD_PORT_GET,		/* can dump */

	DEVLINK_CMD_PORT_SET,

	DEVLINK_CMD_PORT_NEW,

	DEVLINK_CMD_PORT_DEL,



	DEVLINK_CMD_PORT_SPLIT,

	DEVLINK_CMD_PORT_UNSPLIT,



	/* add new commands above here */



	__DEVLINK_CMD_MAX,

	DEVLINK_CMD_MAX = __DEVLINK_CMD_MAX - 1

};



enum devlink_port_type {

	DEVLINK_PORT_TYPE_NOTSET,

	DEVLINK_PORT_TYPE_AUTO,

	DEVLINK_PORT_TYPE_ETH,

	DEVLINK_PORT_TYPE_IB,

};



enum devlink_attr {

	/* don't change the order or add anything between, this is ABI! */

	DEVLINK_ATTR_UNSPEC,



	/* bus name + dev name together are a handle for devlink entity */

	DEVLINK_ATTR_BUS_NAME,			/* string */

	DEVLINK_ATTR_DEV_NAME,			/* string */



	DEVLINK_ATTR_PORT_INDEX,		/* u32 */

	DEVLINK_ATTR_PORT_TYPE,			/* u16 */

	DEVLINK_ATTR_PORT_DESIRED_TYPE,		/* u16 */

	DEVLINK_ATTR_PORT_NETDEV_IFINDEX,	/* u32 */

	DEVLINK_ATTR_PORT_NETDEV_NAME,		/* string */

	DEVLINK_ATTR_PORT_IBDEV_NAME,		/* string */

	DEVLINK_ATTR_PORT_SPLIT_COUNT,		/* u32 */

	DEVLINK_ATTR_PORT_SPLIT_GROUP,		/* u32 */



	/* add new attributes above here, update the policy in devlink.c */



	__DEVLINK_ATTR_MAX,

	DEVLINK_ATTR_MAX = __DEVLINK_ATTR_MAX - 1

};



#endif /* _UAPI_LINUX_DEVLINK_H_ */

net/Kconfig

+7 −0
Original line number Original line Diff line number Diff line
@@ -396,6 +396,13 @@ config DST_CACHE 
	bool "dst cache"

	bool "dst cache"

	default n

	default n





config NET_DEVLINK

	tristate "Network physical/parent device Netlink interface"

	help

	  Network physical/parent device Netlink interface provides

	  infrastructure to support access to physical chip-wide config and

	  monitoring.



endif   # if NET

endif   # if NET





# Used by archs to tell that they support BPF_JIT

# Used by archs to tell that they support BPF_JIT

net/core/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -25,3 +25,4 @@ obj-$(CONFIG_CGROUP_NET_PRIO) += netprio_cgroup.o 
obj-$(CONFIG_CGROUP_NET_CLASSID) += netclassid_cgroup.o

obj-$(CONFIG_CGROUP_NET_CLASSID) += netclassid_cgroup.o

obj-$(CONFIG_LWTUNNEL) += lwtunnel.o

obj-$(CONFIG_LWTUNNEL) += lwtunnel.o

obj-$(CONFIG_DST_CACHE) += dst_cache.o

obj-$(CONFIG_DST_CACHE) += dst_cache.o

obj-$(CONFIG_NET_DEVLINK) += devlink.o