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Introduce devlink infrastructure

Browse Source 
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: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2016-02-26 17:32:23 +01:00 committed by David S. Miller
parent bd070e2126
commit bfcd3a4661
6 changed files with 966 additions and 0 deletions
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8
MAINTAINERS
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@ -3499,6 +3499,14 @@ F: include/linux/device-mapper.h
F: include/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
DIALOG SEMICONDUCTOR DRIVERS
M: Support Opensource <support.opensource@diasemi.com>
W: http://www.dialog-semiconductor.com/products

140
include/net/devlink.h Normal file
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@ -0,0 +1,140 @@
/*
* 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_ */

72
include/uapi/linux/devlink.h Normal file
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@ -0,0 +1,72 @@
/*
* 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_ */

7
net/Kconfig
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@ -396,6 +396,13 @@ config DST_CACHE
bool "dst cache"
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
# Used by archs to tell that they support BPF_JIT

1
net/core/Makefile
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@ -25,3 +25,4 @@ obj-$(CONFIG_CGROUP_NET_PRIO) += netprio_cgroup.o
obj-$(CONFIG_CGROUP_NET_CLASSID) += netclassid_cgroup.o
obj-$(CONFIG_LWTUNNEL) += lwtunnel.o
obj-$(CONFIG_DST_CACHE) += dst_cache.o
obj-$(CONFIG_NET_DEVLINK) += devlink.o

738
net/core/devlink.c Normal file
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@ -0,0 +1,738 @@
/*
* net/core/devlink.c - Network physical/parent device Netlink interface
*
* Heavily inspired by net/wireless/
* 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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/gfp.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/netdevice.h>
#include <rdma/ib_verbs.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <net/rtnetlink.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/devlink.h>
static LIST_HEAD(devlink_list);
/* devlink_mutex
*
* An overall lock guarding every operation coming from userspace.
* It also guards devlink devices list and it is taken when
* driver registers/unregisters it.
*/
static DEFINE_MUTEX(devlink_mutex);
/* devlink_port_mutex
*
* Shared lock to guard lists of ports in all devlink devices.
*/
static DEFINE_MUTEX(devlink_port_mutex);
static struct net *devlink_net(const struct devlink *devlink)
{
return read_pnet(&devlink->_net);
}
static void devlink_net_set(struct devlink *devlink, struct net *net)
{
write_pnet(&devlink->_net, net);
}
static struct devlink *devlink_get_from_attrs(struct net *net,
struct nlattr **attrs)
{
struct devlink *devlink;
char *busname;
char *devname;
if (!attrs[DEVLINK_ATTR_BUS_NAME] || !attrs[DEVLINK_ATTR_DEV_NAME])
return ERR_PTR(-EINVAL);
busname = nla_data(attrs[DEVLINK_ATTR_BUS_NAME]);
devname = nla_data(attrs[DEVLINK_ATTR_DEV_NAME]);
list_for_each_entry(devlink, &devlink_list, list) {
if (strcmp(devlink->dev->bus->name, busname) == 0 &&
strcmp(dev_name(devlink->dev), devname) == 0 &&
net_eq(devlink_net(devlink), net))
return devlink;
}
return ERR_PTR(-ENODEV);
}
static struct devlink *devlink_get_from_info(struct genl_info *info)
{
return devlink_get_from_attrs(genl_info_net(info), info->attrs);
}
static struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
int port_index)
{
struct devlink_port *devlink_port;
list_for_each_entry(devlink_port, &devlink->port_list, list) {
if (devlink_port->index == port_index)
return devlink_port;
}
return NULL;
}
static bool devlink_port_index_exists(struct devlink *devlink, int port_index)
{
return devlink_port_get_by_index(devlink, port_index);
}
static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs)
{
if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index);
if (!devlink_port)
return ERR_PTR(-ENODEV);
return devlink_port;
}
return ERR_PTR(-EINVAL);
}
static struct devlink_port *devlink_port_get_from_info(struct devlink *devlink,
struct genl_info *info)
{
return devlink_port_get_from_attrs(devlink, info->attrs);
}
#define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
static int devlink_nl_pre_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink;
mutex_lock(&devlink_mutex);
devlink = devlink_get_from_info(info);
if (IS_ERR(devlink)) {
mutex_unlock(&devlink_mutex);
return PTR_ERR(devlink);
}
info->user_ptr[0] = devlink;
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT) {
struct devlink_port *devlink_port;
mutex_lock(&devlink_port_mutex);
devlink_port = devlink_port_get_from_info(devlink, info);
if (IS_ERR(devlink_port)) {
mutex_unlock(&devlink_port_mutex);
mutex_unlock(&devlink_mutex);
return PTR_ERR(devlink_port);
}
info->user_ptr[1] = devlink_port;
}
return 0;
}
static void devlink_nl_post_doit(const struct genl_ops *ops,
struct sk_buff *skb, struct genl_info *info)
{
if (ops->internal_flags & DEVLINK_NL_FLAG_NEED_PORT)
mutex_unlock(&devlink_port_mutex);
mutex_unlock(&devlink_mutex);
}
static struct genl_family devlink_nl_family = {
.id = GENL_ID_GENERATE,
.name = DEVLINK_GENL_NAME,
.version = DEVLINK_GENL_VERSION,
.maxattr = DEVLINK_ATTR_MAX,
.netnsok = true,
.pre_doit = devlink_nl_pre_doit,
.post_doit = devlink_nl_post_doit,
};
enum devlink_multicast_groups {
DEVLINK_MCGRP_CONFIG,
};
static const struct genl_multicast_group devlink_nl_mcgrps[] = {
[DEVLINK_MCGRP_CONFIG] = { .name = DEVLINK_GENL_MCGRP_CONFIG_NAME },
};
static int devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
{
if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
return -EMSGSIZE;
if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
return -EMSGSIZE;
return 0;
}
static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_notify(struct devlink *devlink, enum devlink_command cmd)
{
struct sk_buff *msg;
int err;
WARN_ON(cmd != DEVLINK_CMD_NEW && cmd != DEVLINK_CMD_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink *devlink,
struct devlink_port *devlink_port,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
if (!hdr)
return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink))
goto nla_put_failure;
if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index))
goto nla_put_failure;
if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type))
goto nla_put_failure;
if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET &&
nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE,
devlink_port->desired_type))
goto nla_put_failure;
if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) {
struct net_device *netdev = devlink_port->type_dev;
if (netdev &&
(nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX,
netdev->ifindex) ||
nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME,
netdev->name)))
goto nla_put_failure;
}
if (devlink_port->type == DEVLINK_PORT_TYPE_IB) {
struct ib_device *ibdev = devlink_port->type_dev;
if (ibdev &&
nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME,
ibdev->name))
goto nla_put_failure;
}
if (devlink_port->split &&
nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP,
devlink_port->split_group))
goto nla_put_failure;
genlmsg_end(msg, hdr);
return 0;
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
}
static void devlink_port_notify(struct devlink_port *devlink_port,
enum devlink_command cmd)
{
struct devlink *devlink = devlink_port->devlink;
struct sk_buff *msg;
int err;
if (!devlink_port->registered)
return;
WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return;
err = devlink_nl_port_fill(msg, devlink, devlink_port, cmd, 0, 0, 0);
if (err) {
nlmsg_free(msg);
return;
}
genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
}
static int devlink_nl_cmd_get_doit(struct sk_buff *skb, struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_fill(msg, devlink, DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq, NLM_F_MULTI);
if (err)
goto out;
idx++;
}
out:
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int devlink_nl_cmd_port_get_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_port *devlink_port = info->user_ptr[1];
struct sk_buff *msg;
int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
err = devlink_nl_port_fill(msg, devlink, devlink_port,
DEVLINK_CMD_PORT_NEW,
info->snd_portid, info->snd_seq, 0);
if (err) {
nlmsg_free(msg);
return err;
}
return genlmsg_reply(msg, info);
}
static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink *devlink;
struct devlink_port *devlink_port;
int start = cb->args[0];
int idx = 0;
int err;
mutex_lock(&devlink_mutex);
mutex_lock(&devlink_port_mutex);
list_for_each_entry(devlink, &devlink_list, list) {
if (!net_eq(devlink_net(devlink), sock_net(msg->sk)))
continue;
list_for_each_entry(devlink_port, &devlink->port_list, list) {
if (idx < start) {
idx++;
continue;
}
err = devlink_nl_port_fill(msg, devlink, devlink_port,
DEVLINK_CMD_NEW,
NETLINK_CB(cb->skb).portid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI);
if (err)
goto out;
idx++;
}
}
out:
mutex_unlock(&devlink_port_mutex);
mutex_unlock(&devlink_mutex);
cb->args[0] = idx;
return msg->len;
}
static int devlink_port_type_set(struct devlink *devlink,
struct devlink_port *devlink_port,
enum devlink_port_type port_type)
{
int err;
if (devlink->ops && devlink->ops->port_type_set) {
if (port_type == DEVLINK_PORT_TYPE_NOTSET)
return -EINVAL;
err = devlink->ops->port_type_set(devlink_port, port_type);
if (err)
return err;
devlink_port->desired_type = port_type;
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
}
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_port_set_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
struct devlink_port *devlink_port = info->user_ptr[1];
int err;
if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) {
enum devlink_port_type port_type;
port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]);
err = devlink_port_type_set(devlink, devlink_port, port_type);
if (err)
return err;
}
return 0;
}
static int devlink_port_split(struct devlink *devlink,
u32 port_index, u32 count)
{
if (devlink->ops && devlink->ops->port_split)
return devlink->ops->port_split(devlink, port_index, count);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_port_split_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
u32 port_index;
u32 count;
if (!info->attrs[DEVLINK_ATTR_PORT_INDEX] ||
!info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT])
return -EINVAL;
port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
return devlink_port_split(devlink, port_index, count);
}
static int devlink_port_unsplit(struct devlink *devlink, u32 port_index)
{
if (devlink->ops && devlink->ops->port_unsplit)
return devlink->ops->port_unsplit(devlink, port_index);
return -EOPNOTSUPP;
}
static int devlink_nl_cmd_port_unsplit_doit(struct sk_buff *skb,
struct genl_info *info)
{
struct devlink *devlink = info->user_ptr[0];
u32 port_index;
if (!info->attrs[DEVLINK_ATTR_PORT_INDEX])
return -EINVAL;
port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]);
return devlink_port_unsplit(devlink, port_index);
}
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_PORT_INDEX] = { .type = NLA_U32 },
[DEVLINK_ATTR_PORT_TYPE] = { .type = NLA_U16 },
[DEVLINK_ATTR_PORT_SPLIT_COUNT] = { .type = NLA_U32 },
};
static const struct genl_ops devlink_nl_ops[] = {
{
.cmd = DEVLINK_CMD_GET,
.doit = devlink_nl_cmd_get_doit,
.dumpit = devlink_nl_cmd_get_dumpit,
.policy = devlink_nl_policy,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_PORT_GET,
.doit = devlink_nl_cmd_port_get_doit,
.dumpit = devlink_nl_cmd_port_get_dumpit,
.policy = devlink_nl_policy,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
/* can be retrieved by unprivileged users */
},
{
.cmd = DEVLINK_CMD_PORT_SET,
.doit = devlink_nl_cmd_port_set_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_PORT,
},
{
.cmd = DEVLINK_CMD_PORT_SPLIT,
.doit = devlink_nl_cmd_port_split_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
},
{
.cmd = DEVLINK_CMD_PORT_UNSPLIT,
.doit = devlink_nl_cmd_port_unsplit_doit,
.policy = devlink_nl_policy,
.flags = GENL_ADMIN_PERM,
},
};
/**
* devlink_alloc - Allocate new devlink instance resources
*
* @ops: ops
* @priv_size: size of user private data
*
* Allocate new devlink instance resources, including devlink index
* and name.
*/
struct devlink *devlink_alloc(const struct devlink_ops *ops, size_t priv_size)
{
struct devlink *devlink;
devlink = kzalloc(sizeof(*devlink) + priv_size, GFP_KERNEL);
if (!devlink)
return NULL;
devlink->ops = ops;
devlink_net_set(devlink, &init_net);
INIT_LIST_HEAD(&devlink->port_list);
return devlink;
}
EXPORT_SYMBOL_GPL(devlink_alloc);
/**
* devlink_register - Register devlink instance
*
* @devlink: devlink
*/
int devlink_register(struct devlink *devlink, struct device *dev)
{
mutex_lock(&devlink_mutex);
devlink->dev = dev;
list_add_tail(&devlink->list, &devlink_list);
devlink_notify(devlink, DEVLINK_CMD_NEW);
mutex_unlock(&devlink_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_register);
/**
* devlink_unregister - Unregister devlink instance
*
* @devlink: devlink
*/
void devlink_unregister(struct devlink *devlink)
{
mutex_lock(&devlink_mutex);
devlink_notify(devlink, DEVLINK_CMD_DEL);
list_del(&devlink->list);
mutex_unlock(&devlink_mutex);
}
EXPORT_SYMBOL_GPL(devlink_unregister);
/**
* devlink_free - Free devlink instance resources
*
* @devlink: devlink
*/
void devlink_free(struct devlink *devlink)
{
kfree(devlink);
}
EXPORT_SYMBOL_GPL(devlink_free);
/**
* devlink_port_register - Register devlink port
*
* @devlink: devlink
* @devlink_port: devlink port
* @port_index
*
* Register devlink port with provided port index. User can use
* any indexing, even hw-related one. devlink_port structure
* is convenient to be embedded inside user driver private structure.
* Note that the caller should take care of zeroing the devlink_port
* structure.
*/
int devlink_port_register(struct devlink *devlink,
struct devlink_port *devlink_port,
unsigned int port_index)
{
mutex_lock(&devlink_port_mutex);
if (devlink_port_index_exists(devlink, port_index)) {
mutex_unlock(&devlink_port_mutex);
return -EEXIST;
}
devlink_port->devlink = devlink;
devlink_port->index = port_index;
devlink_port->type = DEVLINK_PORT_TYPE_NOTSET;
devlink_port->registered = true;
list_add_tail(&devlink_port->list, &devlink->port_list);
mutex_unlock(&devlink_port_mutex);
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
return 0;
}
EXPORT_SYMBOL_GPL(devlink_port_register);
/**
* devlink_port_unregister - Unregister devlink port
*
* @devlink_port: devlink port
*/
void devlink_port_unregister(struct devlink_port *devlink_port)
{
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL);
mutex_lock(&devlink_port_mutex);
list_del(&devlink_port->list);
mutex_unlock(&devlink_port_mutex);
}
EXPORT_SYMBOL_GPL(devlink_port_unregister);
static void __devlink_port_type_set(struct devlink_port *devlink_port,
enum devlink_port_type type,
void *type_dev)
{
devlink_port->type = type;
devlink_port->type_dev = type_dev;
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}
/**
* devlink_port_type_eth_set - Set port type to Ethernet
*
* @devlink_port: devlink port
* @netdev: related netdevice
*/
void devlink_port_type_eth_set(struct devlink_port *devlink_port,
struct net_device *netdev)
{
return __devlink_port_type_set(devlink_port,
DEVLINK_PORT_TYPE_ETH, netdev);
}
EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
/**
* devlink_port_type_ib_set - Set port type to InfiniBand
*
* @devlink_port: devlink port
* @ibdev: related IB device
*/
void devlink_port_type_ib_set(struct devlink_port *devlink_port,
struct ib_device *ibdev)
{
return __devlink_port_type_set(devlink_port,
DEVLINK_PORT_TYPE_IB, ibdev);
}
EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
/**
* devlink_port_type_clear - Clear port type
*
* @devlink_port: devlink port
*/
void devlink_port_type_clear(struct devlink_port *devlink_port)
{
return __devlink_port_type_set(devlink_port,
DEVLINK_PORT_TYPE_NOTSET, NULL);
}
EXPORT_SYMBOL_GPL(devlink_port_type_clear);
/**
* devlink_port_split_set - Set port is split
*
* @devlink_port: devlink port
* @split_group: split group - identifies group split port is part of
*/
void devlink_port_split_set(struct devlink_port *devlink_port,
u32 split_group)
{
devlink_port->split = true;
devlink_port->split_group = split_group;
devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);
}
EXPORT_SYMBOL_GPL(devlink_port_split_set);
static int __init devlink_module_init(void)
{
return genl_register_family_with_ops_groups(&devlink_nl_family,
devlink_nl_ops,
devlink_nl_mcgrps);
}
static void __exit devlink_module_exit(void)
{
genl_unregister_family(&devlink_nl_family);
}
module_init(devlink_module_init);
module_exit(devlink_module_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Network physical device Netlink interface");
MODULE_ALIAS_GENL_FAMILY(DEVLINK_GENL_NAME);