1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
3 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
6 #include <linux/mutex.h>
7 #include <linux/netdevice.h>
8 #include <linux/notifier.h>
9 #include <linux/types.h>
10 #include <linux/workqueue.h>
11 #include <linux/xarray.h>
12 #include <net/devlink.h>
13 #include <net/net_namespace.h>
15 #define DEVLINK_REGISTERED XA_MARK_1
17 #define DEVLINK_RELOAD_STATS_ARRAY_SIZE \
18 (__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX)
20 struct devlink_dev_stats {
21 u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
22 u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
28 struct list_head rate_list;
29 struct list_head sb_list;
30 struct list_head dpipe_table_list;
31 struct list_head resource_list;
32 struct list_head param_list;
33 struct list_head region_list;
34 struct list_head reporter_list;
35 struct devlink_dpipe_headers *dpipe_headers;
36 struct list_head trap_list;
37 struct list_head trap_group_list;
38 struct list_head trap_policer_list;
39 struct list_head linecard_list;
40 const struct devlink_ops *ops;
42 struct xarray snapshot_ids;
43 struct devlink_dev_stats stats;
46 /* Serializes access to devlink instance specific objects such as
47 * port, sb, dpipe, resource, params, region, traps and more.
50 struct lock_class_key lock_key;
53 struct rcu_work rwork;
54 struct notifier_block netdevice_nb;
55 char priv[] __aligned(NETDEV_ALIGN);
58 extern struct xarray devlinks;
59 extern struct genl_family devlink_nl_family;
61 /* devlink instances are open to the access from the user space after
62 * devlink_register() call. Such logical barrier allows us to have certain
63 * expectations related to locking.
65 * Before *_register() - we are in initialization stage and no parallel
66 * access possible to the devlink instance. All drivers perform that phase
67 * by implicitly holding device_lock.
69 * After *_register() - users and driver can access devlink instance at
72 #define ASSERT_DEVLINK_REGISTERED(d) \
73 WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))
74 #define ASSERT_DEVLINK_NOT_REGISTERED(d) \
75 WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))
77 /* Iterate over devlink pointers which were possible to get reference to.
78 * devlink_put() needs to be called for each iterated devlink pointer
79 * in loop body in order to release the reference.
81 #define devlinks_xa_for_each_registered_get(net, index, devlink) \
82 for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++)
84 struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp);
86 static inline bool devl_is_registered(struct devlink *devlink)
88 devl_assert_locked(devlink);
89 return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);
93 #define DEVLINK_NL_FLAG_NEED_PORT BIT(0)
94 #define DEVLINK_NL_FLAG_NEED_DEVLINK_OR_PORT BIT(1)
95 #define DEVLINK_NL_FLAG_NEED_RATE BIT(2)
96 #define DEVLINK_NL_FLAG_NEED_RATE_NODE BIT(3)
97 #define DEVLINK_NL_FLAG_NEED_LINECARD BIT(4)
99 enum devlink_multicast_groups {
100 DEVLINK_MCGRP_CONFIG,
103 /* state held across netlink dumps */
104 struct devlink_nl_dump_state {
105 unsigned long instance;
108 /* DEVLINK_CMD_REGION_READ */
112 /* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */
119 struct devlink_gen_cmd {
120 int (*dump_one)(struct sk_buff *msg, struct devlink *devlink,
121 struct netlink_callback *cb);
124 extern const struct genl_small_ops devlink_nl_ops[56];
127 devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs);
129 void devlink_notify_unregister(struct devlink *devlink);
130 void devlink_notify_register(struct devlink *devlink);
132 int devlink_nl_instance_iter_dump(struct sk_buff *msg,
133 struct netlink_callback *cb);
135 static inline struct devlink_nl_dump_state *
136 devlink_dump_state(struct netlink_callback *cb)
138 NL_ASSET_DUMP_CTX_FITS(struct devlink_nl_dump_state);
140 return (struct devlink_nl_dump_state *)cb->ctx;
144 extern const struct devlink_gen_cmd devl_gen_inst;
145 extern const struct devlink_gen_cmd devl_gen_port;
146 extern const struct devlink_gen_cmd devl_gen_sb;
147 extern const struct devlink_gen_cmd devl_gen_sb_pool;
148 extern const struct devlink_gen_cmd devl_gen_sb_port_pool;
149 extern const struct devlink_gen_cmd devl_gen_sb_tc_pool_bind;
150 extern const struct devlink_gen_cmd devl_gen_selftests;
151 extern const struct devlink_gen_cmd devl_gen_param;
152 extern const struct devlink_gen_cmd devl_gen_region;
153 extern const struct devlink_gen_cmd devl_gen_info;
154 extern const struct devlink_gen_cmd devl_gen_health_reporter;
155 extern const struct devlink_gen_cmd devl_gen_trap;
156 extern const struct devlink_gen_cmd devl_gen_trap_group;
157 extern const struct devlink_gen_cmd devl_gen_trap_policer;
158 extern const struct devlink_gen_cmd devl_gen_linecard;
161 int devlink_port_netdevice_event(struct notifier_block *nb,
162 unsigned long event, void *ptr);
164 struct devlink_port *
165 devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info);
168 bool devlink_reload_actions_valid(const struct devlink_ops *ops);
169 int devlink_reload(struct devlink *devlink, struct net *dest_net,
170 enum devlink_reload_action action,
171 enum devlink_reload_limit limit,
172 u32 *actions_performed, struct netlink_ext_ack *extack);
174 static inline bool devlink_reload_supported(const struct devlink_ops *ops)
176 return ops->reload_down && ops->reload_up;
180 struct devlink_linecard;
182 struct devlink_linecard *
183 devlink_linecard_get_from_info(struct devlink *devlink, struct genl_info *info);
186 extern const struct devlink_gen_cmd devl_gen_rate_get;
188 struct devlink_rate *
189 devlink_rate_get_from_info(struct devlink *devlink, struct genl_info *info);
190 struct devlink_rate *
191 devlink_rate_node_get_from_info(struct devlink *devlink,
192 struct genl_info *info);