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![Eric Dumazet](/assets/img/avatar_default.png)
Both MAC802154_HWSIM_ATTR_RADIO_ID and MAC802154_HWSIM_ATTR_RADIO_EDGE
must be present to avoid a crash.
Fixes: f25da51fdc
("ieee802154: hwsim: add replacement for fakelb")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Alexander Aring <alex.aring@gmail.com>
Cc: Stefan Schmidt <stefan@datenfreihafen.org>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210621180244.882076-1-eric.dumazet@gmail.com
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
925 lines
20 KiB
C
925 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* HWSIM IEEE 802.15.4 interface
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*
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* (C) 2018 Mojatau, Alexander Aring <aring@mojatau.com>
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* Copyright 2007-2012 Siemens AG
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*
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* Based on fakelb, original Written by:
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* Sergey Lapin <slapin@ossfans.org>
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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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#include <linux/module.h>
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#include <linux/timer.h>
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#include <linux/platform_device.h>
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#include <linux/rtnetlink.h>
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#include <linux/netdevice.h>
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#include <linux/device.h>
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#include <linux/spinlock.h>
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#include <net/mac802154.h>
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#include <net/cfg802154.h>
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#include <net/genetlink.h>
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#include "mac802154_hwsim.h"
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MODULE_DESCRIPTION("Software simulator of IEEE 802.15.4 radio(s) for mac802154");
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MODULE_LICENSE("GPL");
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static LIST_HEAD(hwsim_phys);
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static DEFINE_MUTEX(hwsim_phys_lock);
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static struct platform_device *mac802154hwsim_dev;
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/* MAC802154_HWSIM netlink family */
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static struct genl_family hwsim_genl_family;
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static int hwsim_radio_idx;
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enum hwsim_multicast_groups {
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HWSIM_MCGRP_CONFIG,
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};
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static const struct genl_multicast_group hwsim_mcgrps[] = {
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[HWSIM_MCGRP_CONFIG] = { .name = "config", },
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};
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struct hwsim_pib {
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u8 page;
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u8 channel;
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struct rcu_head rcu;
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};
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struct hwsim_edge_info {
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u8 lqi;
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struct rcu_head rcu;
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};
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struct hwsim_edge {
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struct hwsim_phy *endpoint;
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struct hwsim_edge_info __rcu *info;
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struct list_head list;
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struct rcu_head rcu;
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};
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struct hwsim_phy {
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struct ieee802154_hw *hw;
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u32 idx;
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struct hwsim_pib __rcu *pib;
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bool suspended;
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struct list_head edges;
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struct list_head list;
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};
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static int hwsim_add_one(struct genl_info *info, struct device *dev,
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bool init);
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static void hwsim_del(struct hwsim_phy *phy);
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static int hwsim_hw_ed(struct ieee802154_hw *hw, u8 *level)
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{
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*level = 0xbe;
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return 0;
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}
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static int hwsim_hw_channel(struct ieee802154_hw *hw, u8 page, u8 channel)
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{
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struct hwsim_phy *phy = hw->priv;
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struct hwsim_pib *pib, *pib_old;
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pib = kzalloc(sizeof(*pib), GFP_KERNEL);
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if (!pib)
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return -ENOMEM;
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pib->page = page;
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pib->channel = channel;
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pib_old = rtnl_dereference(phy->pib);
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rcu_assign_pointer(phy->pib, pib);
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kfree_rcu(pib_old, rcu);
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return 0;
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}
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static int hwsim_hw_xmit(struct ieee802154_hw *hw, struct sk_buff *skb)
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{
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struct hwsim_phy *current_phy = hw->priv;
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struct hwsim_pib *current_pib, *endpoint_pib;
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struct hwsim_edge_info *einfo;
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struct hwsim_edge *e;
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WARN_ON(current_phy->suspended);
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rcu_read_lock();
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current_pib = rcu_dereference(current_phy->pib);
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list_for_each_entry_rcu(e, ¤t_phy->edges, list) {
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/* Can be changed later in rx_irqsafe, but this is only a
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* performance tweak. Received radio should drop the frame
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* in mac802154 stack anyway... so we don't need to be
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* 100% of locking here to check on suspended
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*/
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if (e->endpoint->suspended)
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continue;
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endpoint_pib = rcu_dereference(e->endpoint->pib);
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if (current_pib->page == endpoint_pib->page &&
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current_pib->channel == endpoint_pib->channel) {
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struct sk_buff *newskb = pskb_copy(skb, GFP_ATOMIC);
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einfo = rcu_dereference(e->info);
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if (newskb)
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ieee802154_rx_irqsafe(e->endpoint->hw, newskb,
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einfo->lqi);
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}
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}
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rcu_read_unlock();
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ieee802154_xmit_complete(hw, skb, false);
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return 0;
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}
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static int hwsim_hw_start(struct ieee802154_hw *hw)
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{
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struct hwsim_phy *phy = hw->priv;
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phy->suspended = false;
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return 0;
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}
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static void hwsim_hw_stop(struct ieee802154_hw *hw)
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{
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struct hwsim_phy *phy = hw->priv;
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phy->suspended = true;
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}
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static int
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hwsim_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
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{
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return 0;
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}
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static const struct ieee802154_ops hwsim_ops = {
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.owner = THIS_MODULE,
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.xmit_async = hwsim_hw_xmit,
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.ed = hwsim_hw_ed,
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.set_channel = hwsim_hw_channel,
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.start = hwsim_hw_start,
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.stop = hwsim_hw_stop,
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.set_promiscuous_mode = hwsim_set_promiscuous_mode,
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};
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static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
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{
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return hwsim_add_one(info, &mac802154hwsim_dev->dev, false);
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}
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static int hwsim_del_radio_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct hwsim_phy *phy, *tmp;
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s64 idx = -1;
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if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID])
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return -EINVAL;
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idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
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mutex_lock(&hwsim_phys_lock);
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list_for_each_entry_safe(phy, tmp, &hwsim_phys, list) {
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if (idx == phy->idx) {
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hwsim_del(phy);
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mutex_unlock(&hwsim_phys_lock);
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return 0;
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}
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}
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mutex_unlock(&hwsim_phys_lock);
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return -ENODEV;
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}
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static int append_radio_msg(struct sk_buff *skb, struct hwsim_phy *phy)
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{
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struct nlattr *nl_edges, *nl_edge;
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struct hwsim_edge_info *einfo;
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struct hwsim_edge *e;
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int ret;
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ret = nla_put_u32(skb, MAC802154_HWSIM_ATTR_RADIO_ID, phy->idx);
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if (ret < 0)
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return ret;
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rcu_read_lock();
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if (list_empty(&phy->edges)) {
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rcu_read_unlock();
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return 0;
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}
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nl_edges = nla_nest_start_noflag(skb,
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MAC802154_HWSIM_ATTR_RADIO_EDGES);
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if (!nl_edges) {
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rcu_read_unlock();
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return -ENOBUFS;
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}
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list_for_each_entry_rcu(e, &phy->edges, list) {
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nl_edge = nla_nest_start_noflag(skb,
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MAC802154_HWSIM_ATTR_RADIO_EDGE);
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if (!nl_edge) {
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rcu_read_unlock();
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nla_nest_cancel(skb, nl_edges);
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return -ENOBUFS;
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}
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ret = nla_put_u32(skb, MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID,
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e->endpoint->idx);
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if (ret < 0) {
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rcu_read_unlock();
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nla_nest_cancel(skb, nl_edge);
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nla_nest_cancel(skb, nl_edges);
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return ret;
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}
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einfo = rcu_dereference(e->info);
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ret = nla_put_u8(skb, MAC802154_HWSIM_EDGE_ATTR_LQI,
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einfo->lqi);
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if (ret < 0) {
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rcu_read_unlock();
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nla_nest_cancel(skb, nl_edge);
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nla_nest_cancel(skb, nl_edges);
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return ret;
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}
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nla_nest_end(skb, nl_edge);
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}
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rcu_read_unlock();
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nla_nest_end(skb, nl_edges);
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return 0;
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}
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static int hwsim_get_radio(struct sk_buff *skb, struct hwsim_phy *phy,
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u32 portid, u32 seq,
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struct netlink_callback *cb, int flags)
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{
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void *hdr;
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int res;
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hdr = genlmsg_put(skb, portid, seq, &hwsim_genl_family, flags,
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MAC802154_HWSIM_CMD_GET_RADIO);
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if (!hdr)
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return -EMSGSIZE;
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if (cb)
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genl_dump_check_consistent(cb, hdr);
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res = append_radio_msg(skb, phy);
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if (res < 0)
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goto out_err;
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genlmsg_end(skb, hdr);
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return 0;
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out_err:
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genlmsg_cancel(skb, hdr);
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return res;
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}
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static int hwsim_get_radio_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct hwsim_phy *phy;
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struct sk_buff *skb;
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int idx, res = -ENODEV;
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if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID])
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return -EINVAL;
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idx = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
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mutex_lock(&hwsim_phys_lock);
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list_for_each_entry(phy, &hwsim_phys, list) {
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if (phy->idx != idx)
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continue;
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skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
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if (!skb) {
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res = -ENOMEM;
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goto out_err;
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}
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res = hwsim_get_radio(skb, phy, info->snd_portid,
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info->snd_seq, NULL, 0);
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if (res < 0) {
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nlmsg_free(skb);
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goto out_err;
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}
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res = genlmsg_reply(skb, info);
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break;
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}
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out_err:
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mutex_unlock(&hwsim_phys_lock);
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return res;
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}
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static int hwsim_dump_radio_nl(struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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int idx = cb->args[0];
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struct hwsim_phy *phy;
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int res;
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mutex_lock(&hwsim_phys_lock);
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if (idx == hwsim_radio_idx)
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goto done;
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list_for_each_entry(phy, &hwsim_phys, list) {
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if (phy->idx < idx)
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continue;
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res = hwsim_get_radio(skb, phy, NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, cb, NLM_F_MULTI);
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if (res < 0)
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break;
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idx = phy->idx + 1;
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}
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cb->args[0] = idx;
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done:
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mutex_unlock(&hwsim_phys_lock);
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return skb->len;
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}
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/* caller need to held hwsim_phys_lock */
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static struct hwsim_phy *hwsim_get_radio_by_id(uint32_t idx)
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{
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struct hwsim_phy *phy;
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list_for_each_entry(phy, &hwsim_phys, list) {
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if (phy->idx == idx)
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return phy;
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}
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return NULL;
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}
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static const struct nla_policy hwsim_edge_policy[MAC802154_HWSIM_EDGE_ATTR_MAX + 1] = {
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[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID] = { .type = NLA_U32 },
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[MAC802154_HWSIM_EDGE_ATTR_LQI] = { .type = NLA_U8 },
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};
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static struct hwsim_edge *hwsim_alloc_edge(struct hwsim_phy *endpoint, u8 lqi)
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{
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struct hwsim_edge_info *einfo;
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struct hwsim_edge *e;
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e = kzalloc(sizeof(*e), GFP_KERNEL);
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if (!e)
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return NULL;
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einfo = kzalloc(sizeof(*einfo), GFP_KERNEL);
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if (!einfo) {
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kfree(e);
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return NULL;
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}
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einfo->lqi = 0xff;
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rcu_assign_pointer(e->info, einfo);
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e->endpoint = endpoint;
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return e;
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}
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static void hwsim_free_edge(struct hwsim_edge *e)
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{
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struct hwsim_edge_info *einfo;
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rcu_read_lock();
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einfo = rcu_dereference(e->info);
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rcu_read_unlock();
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kfree_rcu(einfo, rcu);
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kfree_rcu(e, rcu);
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}
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static int hwsim_new_edge_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
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struct hwsim_phy *phy_v0, *phy_v1;
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struct hwsim_edge *e;
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u32 v0, v1;
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if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] &&
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!info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
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return -EINVAL;
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if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL))
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return -EINVAL;
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if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID])
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return -EINVAL;
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v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
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v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]);
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if (v0 == v1)
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return -EINVAL;
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mutex_lock(&hwsim_phys_lock);
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phy_v0 = hwsim_get_radio_by_id(v0);
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if (!phy_v0) {
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mutex_unlock(&hwsim_phys_lock);
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return -ENOENT;
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}
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phy_v1 = hwsim_get_radio_by_id(v1);
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if (!phy_v1) {
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mutex_unlock(&hwsim_phys_lock);
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return -ENOENT;
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}
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rcu_read_lock();
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list_for_each_entry_rcu(e, &phy_v0->edges, list) {
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if (e->endpoint->idx == v1) {
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mutex_unlock(&hwsim_phys_lock);
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rcu_read_unlock();
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return -EEXIST;
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}
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}
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rcu_read_unlock();
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e = hwsim_alloc_edge(phy_v1, 0xff);
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if (!e) {
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mutex_unlock(&hwsim_phys_lock);
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return -ENOMEM;
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}
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list_add_rcu(&e->list, &phy_v0->edges);
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/* wait until changes are done under hwsim_phys_lock lock
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* should prevent of calling this function twice while
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* edges list has not the changes yet.
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*/
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synchronize_rcu();
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mutex_unlock(&hwsim_phys_lock);
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return 0;
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}
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static int hwsim_del_edge_nl(struct sk_buff *msg, struct genl_info *info)
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{
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struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
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struct hwsim_phy *phy_v0;
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struct hwsim_edge *e;
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u32 v0, v1;
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if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] ||
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!info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
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return -EINVAL;
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if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL))
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return -EINVAL;
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if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID])
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return -EINVAL;
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v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
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v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]);
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mutex_lock(&hwsim_phys_lock);
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phy_v0 = hwsim_get_radio_by_id(v0);
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if (!phy_v0) {
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mutex_unlock(&hwsim_phys_lock);
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return -ENOENT;
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}
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rcu_read_lock();
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list_for_each_entry_rcu(e, &phy_v0->edges, list) {
|
|
if (e->endpoint->idx == v1) {
|
|
rcu_read_unlock();
|
|
list_del_rcu(&e->list);
|
|
hwsim_free_edge(e);
|
|
/* same again - wait until list changes are done */
|
|
synchronize_rcu();
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
return 0;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
static int hwsim_set_edge_lqi(struct sk_buff *msg, struct genl_info *info)
|
|
{
|
|
struct nlattr *edge_attrs[MAC802154_HWSIM_EDGE_ATTR_MAX + 1];
|
|
struct hwsim_edge_info *einfo;
|
|
struct hwsim_phy *phy_v0;
|
|
struct hwsim_edge *e;
|
|
u32 v0, v1;
|
|
u8 lqi;
|
|
|
|
if (!info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID] &&
|
|
!info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE])
|
|
return -EINVAL;
|
|
|
|
if (nla_parse_nested_deprecated(edge_attrs, MAC802154_HWSIM_EDGE_ATTR_MAX, info->attrs[MAC802154_HWSIM_ATTR_RADIO_EDGE], hwsim_edge_policy, NULL))
|
|
return -EINVAL;
|
|
|
|
if (!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID] &&
|
|
!edge_attrs[MAC802154_HWSIM_EDGE_ATTR_LQI])
|
|
return -EINVAL;
|
|
|
|
v0 = nla_get_u32(info->attrs[MAC802154_HWSIM_ATTR_RADIO_ID]);
|
|
v1 = nla_get_u32(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_ENDPOINT_ID]);
|
|
lqi = nla_get_u8(edge_attrs[MAC802154_HWSIM_EDGE_ATTR_LQI]);
|
|
|
|
mutex_lock(&hwsim_phys_lock);
|
|
phy_v0 = hwsim_get_radio_by_id(v0);
|
|
if (!phy_v0) {
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
return -ENOENT;
|
|
}
|
|
|
|
einfo = kzalloc(sizeof(*einfo), GFP_KERNEL);
|
|
if (!einfo) {
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(e, &phy_v0->edges, list) {
|
|
if (e->endpoint->idx == v1) {
|
|
einfo->lqi = lqi;
|
|
rcu_assign_pointer(e->info, einfo);
|
|
rcu_read_unlock();
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
return 0;
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
kfree(einfo);
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
|
|
return -ENOENT;
|
|
}
|
|
|
|
/* MAC802154_HWSIM netlink policy */
|
|
|
|
static const struct nla_policy hwsim_genl_policy[MAC802154_HWSIM_ATTR_MAX + 1] = {
|
|
[MAC802154_HWSIM_ATTR_RADIO_ID] = { .type = NLA_U32 },
|
|
[MAC802154_HWSIM_ATTR_RADIO_EDGE] = { .type = NLA_NESTED },
|
|
[MAC802154_HWSIM_ATTR_RADIO_EDGES] = { .type = NLA_NESTED },
|
|
};
|
|
|
|
/* Generic Netlink operations array */
|
|
static const struct genl_small_ops hwsim_nl_ops[] = {
|
|
{
|
|
.cmd = MAC802154_HWSIM_CMD_NEW_RADIO,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = hwsim_new_radio_nl,
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MAC802154_HWSIM_CMD_DEL_RADIO,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = hwsim_del_radio_nl,
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MAC802154_HWSIM_CMD_GET_RADIO,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = hwsim_get_radio_nl,
|
|
.dumpit = hwsim_dump_radio_nl,
|
|
},
|
|
{
|
|
.cmd = MAC802154_HWSIM_CMD_NEW_EDGE,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = hwsim_new_edge_nl,
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MAC802154_HWSIM_CMD_DEL_EDGE,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = hwsim_del_edge_nl,
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
},
|
|
{
|
|
.cmd = MAC802154_HWSIM_CMD_SET_EDGE,
|
|
.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
|
|
.doit = hwsim_set_edge_lqi,
|
|
.flags = GENL_UNS_ADMIN_PERM,
|
|
},
|
|
};
|
|
|
|
static struct genl_family hwsim_genl_family __ro_after_init = {
|
|
.name = "MAC802154_HWSIM",
|
|
.version = 1,
|
|
.maxattr = MAC802154_HWSIM_ATTR_MAX,
|
|
.policy = hwsim_genl_policy,
|
|
.module = THIS_MODULE,
|
|
.small_ops = hwsim_nl_ops,
|
|
.n_small_ops = ARRAY_SIZE(hwsim_nl_ops),
|
|
.mcgrps = hwsim_mcgrps,
|
|
.n_mcgrps = ARRAY_SIZE(hwsim_mcgrps),
|
|
};
|
|
|
|
static void hwsim_mcast_config_msg(struct sk_buff *mcast_skb,
|
|
struct genl_info *info)
|
|
{
|
|
if (info)
|
|
genl_notify(&hwsim_genl_family, mcast_skb, info,
|
|
HWSIM_MCGRP_CONFIG, GFP_KERNEL);
|
|
else
|
|
genlmsg_multicast(&hwsim_genl_family, mcast_skb, 0,
|
|
HWSIM_MCGRP_CONFIG, GFP_KERNEL);
|
|
}
|
|
|
|
static void hwsim_mcast_new_radio(struct genl_info *info, struct hwsim_phy *phy)
|
|
{
|
|
struct sk_buff *mcast_skb;
|
|
void *data;
|
|
|
|
mcast_skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
|
|
if (!mcast_skb)
|
|
return;
|
|
|
|
data = genlmsg_put(mcast_skb, 0, 0, &hwsim_genl_family, 0,
|
|
MAC802154_HWSIM_CMD_NEW_RADIO);
|
|
if (!data)
|
|
goto out_err;
|
|
|
|
if (append_radio_msg(mcast_skb, phy) < 0)
|
|
goto out_err;
|
|
|
|
genlmsg_end(mcast_skb, data);
|
|
|
|
hwsim_mcast_config_msg(mcast_skb, info);
|
|
return;
|
|
|
|
out_err:
|
|
genlmsg_cancel(mcast_skb, data);
|
|
nlmsg_free(mcast_skb);
|
|
}
|
|
|
|
static void hwsim_edge_unsubscribe_me(struct hwsim_phy *phy)
|
|
{
|
|
struct hwsim_phy *tmp;
|
|
struct hwsim_edge *e;
|
|
|
|
rcu_read_lock();
|
|
/* going to all phy edges and remove phy from it */
|
|
list_for_each_entry(tmp, &hwsim_phys, list) {
|
|
list_for_each_entry_rcu(e, &tmp->edges, list) {
|
|
if (e->endpoint->idx == phy->idx) {
|
|
list_del_rcu(&e->list);
|
|
hwsim_free_edge(e);
|
|
}
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
synchronize_rcu();
|
|
}
|
|
|
|
static int hwsim_subscribe_all_others(struct hwsim_phy *phy)
|
|
{
|
|
struct hwsim_phy *sub;
|
|
struct hwsim_edge *e;
|
|
|
|
list_for_each_entry(sub, &hwsim_phys, list) {
|
|
e = hwsim_alloc_edge(sub, 0xff);
|
|
if (!e)
|
|
goto me_fail;
|
|
|
|
list_add_rcu(&e->list, &phy->edges);
|
|
}
|
|
|
|
list_for_each_entry(sub, &hwsim_phys, list) {
|
|
e = hwsim_alloc_edge(phy, 0xff);
|
|
if (!e)
|
|
goto sub_fail;
|
|
|
|
list_add_rcu(&e->list, &sub->edges);
|
|
}
|
|
|
|
return 0;
|
|
|
|
sub_fail:
|
|
hwsim_edge_unsubscribe_me(phy);
|
|
me_fail:
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(e, &phy->edges, list) {
|
|
list_del_rcu(&e->list);
|
|
hwsim_free_edge(e);
|
|
}
|
|
rcu_read_unlock();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static int hwsim_add_one(struct genl_info *info, struct device *dev,
|
|
bool init)
|
|
{
|
|
struct ieee802154_hw *hw;
|
|
struct hwsim_phy *phy;
|
|
struct hwsim_pib *pib;
|
|
int idx;
|
|
int err;
|
|
|
|
idx = hwsim_radio_idx++;
|
|
|
|
hw = ieee802154_alloc_hw(sizeof(*phy), &hwsim_ops);
|
|
if (!hw)
|
|
return -ENOMEM;
|
|
|
|
phy = hw->priv;
|
|
phy->hw = hw;
|
|
|
|
/* 868 MHz BPSK 802.15.4-2003 */
|
|
hw->phy->supported.channels[0] |= 1;
|
|
/* 915 MHz BPSK 802.15.4-2003 */
|
|
hw->phy->supported.channels[0] |= 0x7fe;
|
|
/* 2.4 GHz O-QPSK 802.15.4-2003 */
|
|
hw->phy->supported.channels[0] |= 0x7FFF800;
|
|
/* 868 MHz ASK 802.15.4-2006 */
|
|
hw->phy->supported.channels[1] |= 1;
|
|
/* 915 MHz ASK 802.15.4-2006 */
|
|
hw->phy->supported.channels[1] |= 0x7fe;
|
|
/* 868 MHz O-QPSK 802.15.4-2006 */
|
|
hw->phy->supported.channels[2] |= 1;
|
|
/* 915 MHz O-QPSK 802.15.4-2006 */
|
|
hw->phy->supported.channels[2] |= 0x7fe;
|
|
/* 2.4 GHz CSS 802.15.4a-2007 */
|
|
hw->phy->supported.channels[3] |= 0x3fff;
|
|
/* UWB Sub-gigahertz 802.15.4a-2007 */
|
|
hw->phy->supported.channels[4] |= 1;
|
|
/* UWB Low band 802.15.4a-2007 */
|
|
hw->phy->supported.channels[4] |= 0x1e;
|
|
/* UWB High band 802.15.4a-2007 */
|
|
hw->phy->supported.channels[4] |= 0xffe0;
|
|
/* 750 MHz O-QPSK 802.15.4c-2009 */
|
|
hw->phy->supported.channels[5] |= 0xf;
|
|
/* 750 MHz MPSK 802.15.4c-2009 */
|
|
hw->phy->supported.channels[5] |= 0xf0;
|
|
/* 950 MHz BPSK 802.15.4d-2009 */
|
|
hw->phy->supported.channels[6] |= 0x3ff;
|
|
/* 950 MHz GFSK 802.15.4d-2009 */
|
|
hw->phy->supported.channels[6] |= 0x3ffc00;
|
|
|
|
ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
|
|
|
|
/* hwsim phy channel 13 as default */
|
|
hw->phy->current_channel = 13;
|
|
pib = kzalloc(sizeof(*pib), GFP_KERNEL);
|
|
if (!pib) {
|
|
err = -ENOMEM;
|
|
goto err_pib;
|
|
}
|
|
|
|
rcu_assign_pointer(phy->pib, pib);
|
|
phy->idx = idx;
|
|
INIT_LIST_HEAD(&phy->edges);
|
|
|
|
hw->flags = IEEE802154_HW_PROMISCUOUS;
|
|
hw->parent = dev;
|
|
|
|
err = ieee802154_register_hw(hw);
|
|
if (err)
|
|
goto err_reg;
|
|
|
|
mutex_lock(&hwsim_phys_lock);
|
|
if (init) {
|
|
err = hwsim_subscribe_all_others(phy);
|
|
if (err < 0) {
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
goto err_subscribe;
|
|
}
|
|
}
|
|
list_add_tail(&phy->list, &hwsim_phys);
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
|
|
hwsim_mcast_new_radio(info, phy);
|
|
|
|
return idx;
|
|
|
|
err_subscribe:
|
|
ieee802154_unregister_hw(phy->hw);
|
|
err_reg:
|
|
kfree(pib);
|
|
err_pib:
|
|
ieee802154_free_hw(phy->hw);
|
|
return err;
|
|
}
|
|
|
|
static void hwsim_del(struct hwsim_phy *phy)
|
|
{
|
|
struct hwsim_pib *pib;
|
|
struct hwsim_edge *e;
|
|
|
|
hwsim_edge_unsubscribe_me(phy);
|
|
|
|
list_del(&phy->list);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(e, &phy->edges, list) {
|
|
list_del_rcu(&e->list);
|
|
hwsim_free_edge(e);
|
|
}
|
|
pib = rcu_dereference(phy->pib);
|
|
rcu_read_unlock();
|
|
|
|
kfree_rcu(pib, rcu);
|
|
|
|
ieee802154_unregister_hw(phy->hw);
|
|
ieee802154_free_hw(phy->hw);
|
|
}
|
|
|
|
static int hwsim_probe(struct platform_device *pdev)
|
|
{
|
|
struct hwsim_phy *phy, *tmp;
|
|
int err, i;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
err = hwsim_add_one(NULL, &pdev->dev, true);
|
|
if (err < 0)
|
|
goto err_slave;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "Added 2 mac802154 hwsim hardware radios\n");
|
|
return 0;
|
|
|
|
err_slave:
|
|
mutex_lock(&hwsim_phys_lock);
|
|
list_for_each_entry_safe(phy, tmp, &hwsim_phys, list)
|
|
hwsim_del(phy);
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
return err;
|
|
}
|
|
|
|
static int hwsim_remove(struct platform_device *pdev)
|
|
{
|
|
struct hwsim_phy *phy, *tmp;
|
|
|
|
mutex_lock(&hwsim_phys_lock);
|
|
list_for_each_entry_safe(phy, tmp, &hwsim_phys, list)
|
|
hwsim_del(phy);
|
|
mutex_unlock(&hwsim_phys_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver mac802154hwsim_driver = {
|
|
.probe = hwsim_probe,
|
|
.remove = hwsim_remove,
|
|
.driver = {
|
|
.name = "mac802154_hwsim",
|
|
},
|
|
};
|
|
|
|
static __init int hwsim_init_module(void)
|
|
{
|
|
int rc;
|
|
|
|
rc = genl_register_family(&hwsim_genl_family);
|
|
if (rc)
|
|
return rc;
|
|
|
|
mac802154hwsim_dev = platform_device_register_simple("mac802154_hwsim",
|
|
-1, NULL, 0);
|
|
if (IS_ERR(mac802154hwsim_dev)) {
|
|
rc = PTR_ERR(mac802154hwsim_dev);
|
|
goto platform_dev;
|
|
}
|
|
|
|
rc = platform_driver_register(&mac802154hwsim_driver);
|
|
if (rc < 0)
|
|
goto platform_drv;
|
|
|
|
return 0;
|
|
|
|
platform_drv:
|
|
platform_device_unregister(mac802154hwsim_dev);
|
|
platform_dev:
|
|
genl_unregister_family(&hwsim_genl_family);
|
|
return rc;
|
|
}
|
|
|
|
static __exit void hwsim_remove_module(void)
|
|
{
|
|
genl_unregister_family(&hwsim_genl_family);
|
|
platform_driver_unregister(&mac802154hwsim_driver);
|
|
platform_device_unregister(mac802154hwsim_dev);
|
|
}
|
|
|
|
module_init(hwsim_init_module);
|
|
module_exit(hwsim_remove_module);
|