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d32c38256d
Introduce a new private flag ('DEVLINK_NL_FLAG_NEED_DEV_LOCK') to allow
netlink commands to specify that they need to acquire the device lock in
their pre_doit operation and release it in their post_doit operation.
The reload command will use this flag in the subsequent patch.
No functional changes intended.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
243 lines
7.9 KiB
C
243 lines
7.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
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* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
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*/
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#include <linux/device.h>
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#include <linux/etherdevice.h>
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#include <linux/mutex.h>
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#include <linux/netdevice.h>
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#include <linux/notifier.h>
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#include <linux/types.h>
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#include <linux/workqueue.h>
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#include <linux/xarray.h>
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#include <net/devlink.h>
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#include <net/net_namespace.h>
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#include <net/rtnetlink.h>
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#include <rdma/ib_verbs.h>
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#include "netlink_gen.h"
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struct devlink_rel;
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#define DEVLINK_REGISTERED XA_MARK_1
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#define DEVLINK_RELOAD_STATS_ARRAY_SIZE \
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(__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX)
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struct devlink_dev_stats {
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u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
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u32 remote_reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
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};
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struct devlink {
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u32 index;
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struct xarray ports;
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struct list_head rate_list;
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struct list_head sb_list;
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struct list_head dpipe_table_list;
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struct list_head resource_list;
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struct xarray params;
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struct list_head region_list;
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struct list_head reporter_list;
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struct devlink_dpipe_headers *dpipe_headers;
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struct list_head trap_list;
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struct list_head trap_group_list;
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struct list_head trap_policer_list;
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struct list_head linecard_list;
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const struct devlink_ops *ops;
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struct xarray snapshot_ids;
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struct devlink_dev_stats stats;
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struct device *dev;
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possible_net_t _net;
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/* Serializes access to devlink instance specific objects such as
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* port, sb, dpipe, resource, params, region, traps and more.
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*/
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struct mutex lock;
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struct lock_class_key lock_key;
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u8 reload_failed:1;
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refcount_t refcount;
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struct rcu_work rwork;
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struct devlink_rel *rel;
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struct xarray nested_rels;
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char priv[] __aligned(NETDEV_ALIGN);
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};
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extern struct xarray devlinks;
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extern struct genl_family devlink_nl_family;
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/* devlink instances are open to the access from the user space after
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* devlink_register() call. Such logical barrier allows us to have certain
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* expectations related to locking.
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*
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* Before *_register() - we are in initialization stage and no parallel
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* access possible to the devlink instance. All drivers perform that phase
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* by implicitly holding device_lock.
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*
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* After *_register() - users and driver can access devlink instance at
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* the same time.
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*/
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#define ASSERT_DEVLINK_REGISTERED(d) \
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WARN_ON_ONCE(!xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))
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#define ASSERT_DEVLINK_NOT_REGISTERED(d) \
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WARN_ON_ONCE(xa_get_mark(&devlinks, (d)->index, DEVLINK_REGISTERED))
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/* Iterate over devlink pointers which were possible to get reference to.
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* devlink_put() needs to be called for each iterated devlink pointer
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* in loop body in order to release the reference.
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*/
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#define devlinks_xa_for_each_registered_get(net, index, devlink) \
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for (index = 0; (devlink = devlinks_xa_find_get(net, &index)); index++)
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struct devlink *devlinks_xa_find_get(struct net *net, unsigned long *indexp);
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static inline bool devl_is_registered(struct devlink *devlink)
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{
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devl_assert_locked(devlink);
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return xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED);
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}
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static inline void devl_dev_lock(struct devlink *devlink, bool dev_lock)
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{
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if (dev_lock)
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device_lock(devlink->dev);
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devl_lock(devlink);
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}
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static inline void devl_dev_unlock(struct devlink *devlink, bool dev_lock)
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{
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devl_unlock(devlink);
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if (dev_lock)
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device_unlock(devlink->dev);
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}
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typedef void devlink_rel_notify_cb_t(struct devlink *devlink, u32 obj_index);
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typedef void devlink_rel_cleanup_cb_t(struct devlink *devlink, u32 obj_index,
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u32 rel_index);
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void devlink_rel_nested_in_clear(u32 rel_index);
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int devlink_rel_nested_in_add(u32 *rel_index, u32 devlink_index,
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u32 obj_index, devlink_rel_notify_cb_t *notify_cb,
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devlink_rel_cleanup_cb_t *cleanup_cb,
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struct devlink *devlink);
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void devlink_rel_nested_in_notify(struct devlink *devlink);
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int devlink_rel_devlink_handle_put(struct sk_buff *msg, struct devlink *devlink,
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u32 rel_index, int attrtype,
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bool *msg_updated);
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/* Netlink */
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enum devlink_multicast_groups {
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DEVLINK_MCGRP_CONFIG,
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};
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/* state held across netlink dumps */
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struct devlink_nl_dump_state {
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unsigned long instance;
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int idx;
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union {
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/* DEVLINK_CMD_REGION_READ */
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struct {
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u64 start_offset;
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};
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/* DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET */
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struct {
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u64 dump_ts;
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};
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};
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};
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typedef int devlink_nl_dump_one_func_t(struct sk_buff *msg,
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struct devlink *devlink,
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struct netlink_callback *cb,
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int flags);
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struct devlink *
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devlink_get_from_attrs_lock(struct net *net, struct nlattr **attrs,
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bool dev_lock);
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int devlink_nl_dumpit(struct sk_buff *msg, struct netlink_callback *cb,
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devlink_nl_dump_one_func_t *dump_one);
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static inline struct devlink_nl_dump_state *
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devlink_dump_state(struct netlink_callback *cb)
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{
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NL_ASSERT_DUMP_CTX_FITS(struct devlink_nl_dump_state);
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return (struct devlink_nl_dump_state *)cb->ctx;
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}
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static inline int
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devlink_nl_put_handle(struct sk_buff *msg, struct devlink *devlink)
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{
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if (nla_put_string(msg, DEVLINK_ATTR_BUS_NAME, devlink->dev->bus->name))
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return -EMSGSIZE;
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if (nla_put_string(msg, DEVLINK_ATTR_DEV_NAME, dev_name(devlink->dev)))
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return -EMSGSIZE;
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return 0;
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}
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int devlink_nl_put_nested_handle(struct sk_buff *msg, struct net *net,
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struct devlink *devlink, int attrtype);
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int devlink_nl_msg_reply_and_new(struct sk_buff **msg, struct genl_info *info);
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/* Notify */
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void devlink_notify_register(struct devlink *devlink);
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void devlink_notify_unregister(struct devlink *devlink);
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void devlink_ports_notify_register(struct devlink *devlink);
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void devlink_ports_notify_unregister(struct devlink *devlink);
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void devlink_params_notify_register(struct devlink *devlink);
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void devlink_params_notify_unregister(struct devlink *devlink);
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void devlink_regions_notify_register(struct devlink *devlink);
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void devlink_regions_notify_unregister(struct devlink *devlink);
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void devlink_trap_policers_notify_register(struct devlink *devlink);
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void devlink_trap_policers_notify_unregister(struct devlink *devlink);
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void devlink_trap_groups_notify_register(struct devlink *devlink);
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void devlink_trap_groups_notify_unregister(struct devlink *devlink);
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void devlink_traps_notify_register(struct devlink *devlink);
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void devlink_traps_notify_unregister(struct devlink *devlink);
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void devlink_rates_notify_register(struct devlink *devlink);
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void devlink_rates_notify_unregister(struct devlink *devlink);
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void devlink_linecards_notify_register(struct devlink *devlink);
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void devlink_linecards_notify_unregister(struct devlink *devlink);
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/* Ports */
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#define ASSERT_DEVLINK_PORT_INITIALIZED(devlink_port) \
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WARN_ON_ONCE(!(devlink_port)->initialized)
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struct devlink_port *devlink_port_get_by_index(struct devlink *devlink,
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unsigned int port_index);
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int devlink_port_netdevice_event(struct notifier_block *nb,
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unsigned long event, void *ptr);
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struct devlink_port *
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devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info);
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struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
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struct nlattr **attrs);
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/* Reload */
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bool devlink_reload_actions_valid(const struct devlink_ops *ops);
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int devlink_reload(struct devlink *devlink, struct net *dest_net,
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enum devlink_reload_action action,
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enum devlink_reload_limit limit,
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u32 *actions_performed, struct netlink_ext_ack *extack);
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static inline bool devlink_reload_supported(const struct devlink_ops *ops)
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{
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return ops->reload_down && ops->reload_up;
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}
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/* Params */
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void devlink_params_driverinit_load_new(struct devlink *devlink);
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/* Resources */
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struct devlink_resource;
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int devlink_resources_validate(struct devlink *devlink,
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struct devlink_resource *resource,
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struct genl_info *info);
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/* Rates */
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int devlink_rate_nodes_check(struct devlink *devlink, u16 mode,
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struct netlink_ext_ack *extack);
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/* Linecards */
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unsigned int devlink_linecard_index(struct devlink_linecard *linecard);
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