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The purpose of the netif_is_down() helper was to ensure that the network
interface used was still up when performing the transmission. What it
actually did was to check if _all_ interfaces were up. This was not
noticed at that time because I did not use interfaces at all before
discussing with Alexander Aring about how to handle coordinators
properly.
Drop the helper and call netif_running() on the right sub interface
object directly.
Fixes: 4f79018413 ("net: mac802154: Add a warning in the slow path")
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20220617192914.1275611-1-miquel.raynal@bootlin.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
223 lines
6.7 KiB
C
223 lines
6.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2007-2012 Siemens AG
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*
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* Written by:
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* Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
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* Maxim Gorbachyov <maxim.gorbachev@siemens.com>
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* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
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* Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
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*/
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#ifndef __IEEE802154_I_H
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#define __IEEE802154_I_H
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/hrtimer.h>
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#include <net/cfg802154.h>
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#include <net/mac802154.h>
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#include <net/nl802154.h>
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#include <net/ieee802154_netdev.h>
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#include "llsec.h"
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/* mac802154 device private data */
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struct ieee802154_local {
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struct ieee802154_hw hw;
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const struct ieee802154_ops *ops;
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/* ieee802154 phy */
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struct wpan_phy *phy;
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int open_count;
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/* As in mac80211 slaves list is modified:
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* 1) under the RTNL
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* 2) protected by slaves_mtx;
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* 3) in an RCU manner
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*
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* So atomic readers can use any of this protection methods.
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*/
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struct list_head interfaces;
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struct mutex iflist_mtx;
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/* This one is used for scanning and other jobs not to be interfered
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* with serial driver.
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*/
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struct workqueue_struct *workqueue;
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struct hrtimer ifs_timer;
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bool started;
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bool suspended;
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struct tasklet_struct tasklet;
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struct sk_buff_head skb_queue;
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struct sk_buff *tx_skb;
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struct work_struct sync_tx_work;
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/* A negative Linux error code or a null/positive MLME error status */
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int tx_result;
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};
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enum {
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IEEE802154_RX_MSG = 1,
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};
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enum ieee802154_sdata_state_bits {
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SDATA_STATE_RUNNING,
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};
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/* Slave interface definition.
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*
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* Slaves represent typical network interfaces available from userspace.
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* Each ieee802154 device/transceiver may have several slaves and able
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* to be associated with several networks at the same time.
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*/
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struct ieee802154_sub_if_data {
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struct list_head list; /* the ieee802154_priv->slaves list */
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struct wpan_dev wpan_dev;
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struct ieee802154_local *local;
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struct net_device *dev;
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unsigned long state;
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char name[IFNAMSIZ];
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/* protects sec from concurrent access by netlink. access by
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* encrypt/decrypt/header_create safe without additional protection.
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*/
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struct mutex sec_mtx;
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struct mac802154_llsec sec;
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};
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/* utility functions/constants */
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extern const void *const mac802154_wpan_phy_privid; /* for wpan_phy privid */
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static inline struct ieee802154_local *
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hw_to_local(struct ieee802154_hw *hw)
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{
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return container_of(hw, struct ieee802154_local, hw);
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}
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static inline struct ieee802154_sub_if_data *
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IEEE802154_DEV_TO_SUB_IF(const struct net_device *dev)
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{
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return netdev_priv(dev);
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}
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static inline struct ieee802154_sub_if_data *
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IEEE802154_WPAN_DEV_TO_SUB_IF(struct wpan_dev *wpan_dev)
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{
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return container_of(wpan_dev, struct ieee802154_sub_if_data, wpan_dev);
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}
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static inline bool
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ieee802154_sdata_running(struct ieee802154_sub_if_data *sdata)
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{
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return test_bit(SDATA_STATE_RUNNING, &sdata->state);
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}
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extern struct ieee802154_mlme_ops mac802154_mlme_wpan;
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void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb);
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void ieee802154_xmit_sync_worker(struct work_struct *work);
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int ieee802154_sync_and_hold_queue(struct ieee802154_local *local);
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int ieee802154_mlme_op_pre(struct ieee802154_local *local);
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int ieee802154_mlme_tx(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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void ieee802154_mlme_op_post(struct ieee802154_local *local);
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int ieee802154_mlme_tx_one(struct ieee802154_local *local,
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struct ieee802154_sub_if_data *sdata,
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struct sk_buff *skb);
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netdev_tx_t
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ieee802154_monitor_start_xmit(struct sk_buff *skb, struct net_device *dev);
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netdev_tx_t
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ieee802154_subif_start_xmit(struct sk_buff *skb, struct net_device *dev);
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enum hrtimer_restart ieee802154_xmit_ifs_timer(struct hrtimer *timer);
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/**
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* ieee802154_hold_queue - hold ieee802154 queue
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* @local: main mac object
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*
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* Hold a queue by incrementing an atomic counter and requesting the netif
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* queues to be stopped. The queues cannot be woken up while the counter has not
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* been reset with as any ieee802154_release_queue() calls as needed.
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*/
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void ieee802154_hold_queue(struct ieee802154_local *local);
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/**
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* ieee802154_release_queue - release ieee802154 queue
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* @local: main mac object
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*
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* Release a queue which is held by decrementing an atomic counter and wake it
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* up only if the counter reaches 0.
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*/
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void ieee802154_release_queue(struct ieee802154_local *local);
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/**
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* ieee802154_disable_queue - disable ieee802154 queue
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* @local: main mac object
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*
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* When trying to sync the Tx queue, we cannot just stop the queue
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* (which is basically a bit being set without proper lock handling)
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* because it would be racy. We actually need to call netif_tx_disable()
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* instead, which is done by this helper. Restarting the queue can
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* however still be done with a regular wake call.
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*/
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void ieee802154_disable_queue(struct ieee802154_local *local);
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/* MIB callbacks */
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void mac802154_dev_set_page_channel(struct net_device *dev, u8 page, u8 chan);
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int mac802154_get_params(struct net_device *dev,
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struct ieee802154_llsec_params *params);
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int mac802154_set_params(struct net_device *dev,
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const struct ieee802154_llsec_params *params,
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int changed);
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int mac802154_add_key(struct net_device *dev,
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const struct ieee802154_llsec_key_id *id,
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const struct ieee802154_llsec_key *key);
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int mac802154_del_key(struct net_device *dev,
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const struct ieee802154_llsec_key_id *id);
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int mac802154_add_dev(struct net_device *dev,
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const struct ieee802154_llsec_device *llsec_dev);
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int mac802154_del_dev(struct net_device *dev, __le64 dev_addr);
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int mac802154_add_devkey(struct net_device *dev,
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__le64 device_addr,
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const struct ieee802154_llsec_device_key *key);
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int mac802154_del_devkey(struct net_device *dev,
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__le64 device_addr,
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const struct ieee802154_llsec_device_key *key);
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int mac802154_add_seclevel(struct net_device *dev,
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const struct ieee802154_llsec_seclevel *sl);
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int mac802154_del_seclevel(struct net_device *dev,
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const struct ieee802154_llsec_seclevel *sl);
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void mac802154_lock_table(struct net_device *dev);
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void mac802154_get_table(struct net_device *dev,
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struct ieee802154_llsec_table **t);
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void mac802154_unlock_table(struct net_device *dev);
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int mac802154_wpan_update_llsec(struct net_device *dev);
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/* interface handling */
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int ieee802154_iface_init(void);
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void ieee802154_iface_exit(void);
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void ieee802154_if_remove(struct ieee802154_sub_if_data *sdata);
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struct net_device *
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ieee802154_if_add(struct ieee802154_local *local, const char *name,
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unsigned char name_assign_type, enum nl802154_iftype type,
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__le64 extended_addr);
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void ieee802154_remove_interfaces(struct ieee802154_local *local);
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void ieee802154_stop_device(struct ieee802154_local *local);
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#endif /* __IEEE802154_I_H */
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