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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
*/
#include <linux/mutex.h>
#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/xarray.h>
#include <net/devlink.h>
#include <net/net_namespace.h>
#include "netlink_gen.h"
#define DEVLINK_REGISTERED XA_MARK_1
#define DEVLINK_RELOAD_STATS_ARRAY_SIZE \
(__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX)
struct devlink_dev_stats {
u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
};
struct devlink {
u32 index;
struct xarray ports;
struct list_head rate_list;
struct list_head sb_list;
struct list_head dpipe_table_list;
struct list_head resource_list;
struct xarray params;
struct list_head region_list;
struct list_head reporter_list;
struct devlink_dpipe_headers *dpipe_headers;
struct list_head trap_list;
struct list_head trap_group_list;
struct list_head trap_policer_list;
struct list_head linecard_list;
const struct devlink_ops *ops;
struct xarray snapshot_ids;
struct devlink_dev_stats stats;
struct device *dev;
possible_net_t _net;
/* Serializes access to devlink instance specific objects such as
* port, sb, dpipe, resource, params, region, traps and more.
*/
struct mutex lock;
struct lock_class_key lock_key;
u8 reload_failed:1;
refcount_t refcount;
struct rcu_work rwork;
char priv[] __aligned(NETDEV_ALIGN);
};
extern struct xarray devlinks;
extern struct genl_family devlink_nl_family;
/* devlink instances are open to the access from the user space after
* devlink_register() call. Such logical barrier allows us to have certain
* expectations related to locking.
*
* Before *_register() - we are in initialization stage and no parallel
* access possible to the devlink instance. All drivers perform that phase
* by implicitly holding device_lock.
*
* After *_register() - users and driver can access devlink instance at
* the same time.
*/
#define ASSERT_DEVLINK_REGISTERED(d) \
WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))
#define ASSERT_DEVLINK_NOT_REGISTERED(d) \
WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))
/* Iterate over devlink pointers which were possible to get reference to.
* devlink_put() needs to be called for each iterated devlink pointer
* in loop body in order to release the reference.
*/
#define devlinks_xa_for_each_registered_get(net, index, devlink) \
for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++)
struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp);
static inline bool devl_is_registered(struct devlink *devlink)
{
devl_assert_locked(devlink);
return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);
}
/* Netlink */
#define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
#define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1)
enum devlink_multicast_groups {
DEVLINK_MCGRP_CONFIG,
};
/* state held across netlink dumps */
struct devlink_nl_dump_state {
unsigned long instance;
int idx;
union {
/* DEVLINK_CMD_REGION_READ */
struct {
u64 start_offset;
};
/* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */
struct {
u64 dump_ts;
};
};
};
typedef int devlink_nl_dump_one_func_t(struct sk_buff *msg,
struct devlink *devlink,
struct netlink_callback *cb,
int flags);
extern const struct genl_small_ops devlink_nl_small_ops[40];
struct devlink *
devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs);
void devlink_notify_unregister(struct devlink *devlink);
void devlink_notify_register(struct devlink *devlink);
int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,
devlink_nl_dump_one_func_t *dump_one);
static inline struct devlink_nl_dump_state *
devlink_dump_state(struct netlink_callback *cb)
{
NL_ASSERT_DUMP_CTX_FITS(struct devlink_nl_dump_state);
return (struct devlink_nl_dump_state *)cb->ctx;
}
static inline 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;
}
/* Notify */
void devlink_notify(struct devlink *devlink, enum devlink_command cmd);
/* Ports */
int devlink_port_netdevice_event(struct notifier_block *nb,
unsigned long event, void *ptr);
struct devlink_port *
devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info);
struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
struct nlattr **attrs);
/* Reload */
bool devlink_reload_actions_valid(const struct devlink_ops *ops);
int devlink_reload(struct devlink *devlink, struct net *dest_net,
enum devlink_reload_action action,
enum devlink_reload_limit limit,
u32 *actions_performed, struct netlink_ext_ack *extack);
static inline bool devlink_reload_supported(const struct devlink_ops *ops)
{
return ops->reload_down && ops->reload_up;
}
/* Params */
void devlink_params_driverinit_load_new(struct devlink *devlink);
/* Resources */
struct devlink_resource;
int devlink_resources_validate(struct devlink *devlink,
struct devlink_resource *resource,
struct genl_info *info);
/* Rates */
int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
struct netlink_ext_ack *extack);
/* Devlink nl cmds */
int devlink_nl_cmd_reload(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_eswitch_get_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_eswitch_set_doit(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info);
int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
struct genl_info *info);
int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
struct genl_info *info);
int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
struct genl_info *info);
int devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
struct netlink_callback *cb);
int devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
struct genl_info *info);
int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
struct genl_info *info);
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