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-rw-r--r--include/net/cfg802154.h3
-rw-r--r--net/ieee802154/6lowpan/6lowpan_i.h8
-rw-r--r--net/ieee802154/6lowpan/core.c67
-rw-r--r--net/ieee802154/6lowpan/rx.c38
4 files changed, 30 insertions, 86 deletions
diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 382f94b59f2f..e53b6bfda976 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -173,6 +173,9 @@ struct wpan_dev {
struct list_head list;
struct net_device *netdev;
+ /* lowpan interface, set when the wpan_dev belongs to one lowpan_dev */
+ struct net_device *lowpan_dev;
+
u32 identifier;
/* MAC PIB */
diff --git a/net/ieee802154/6lowpan/6lowpan_i.h b/net/ieee802154/6lowpan/6lowpan_i.h
index e50f69da78eb..923b680adb61 100644
--- a/net/ieee802154/6lowpan/6lowpan_i.h
+++ b/net/ieee802154/6lowpan/6lowpan_i.h
@@ -37,15 +37,9 @@ static inline u32 ieee802154_addr_hash(const struct ieee802154_addr *a)
}
}
-struct lowpan_dev_record {
- struct net_device *ldev;
- struct list_head list;
-};
-
/* private device info */
struct lowpan_dev_info {
struct net_device *real_dev; /* real WPAN device ptr */
- struct mutex dev_list_mtx; /* mutex for list ops */
u16 fragment_tag;
};
@@ -55,8 +49,6 @@ lowpan_dev_info *lowpan_dev_info(const struct net_device *dev)
return netdev_priv(dev);
}
-extern struct list_head lowpan_devices;
-
int lowpan_frag_rcv(struct sk_buff *skb, const u8 frag_type);
void lowpan_net_frag_exit(void);
int lowpan_net_frag_init(void);
diff --git a/net/ieee802154/6lowpan/core.c b/net/ieee802154/6lowpan/core.c
index f20a387a1011..a4edee8fdc79 100644
--- a/net/ieee802154/6lowpan/core.c
+++ b/net/ieee802154/6lowpan/core.c
@@ -52,9 +52,6 @@
#include "6lowpan_i.h"
-LIST_HEAD(lowpan_devices);
-static int lowpan_open_count;
-
static struct header_ops lowpan_header_ops = {
.create = lowpan_header_create,
};
@@ -114,7 +111,6 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[])
{
struct net_device *real_dev;
- struct lowpan_dev_record *entry;
int ret;
ASSERT_RTNL();
@@ -133,31 +129,19 @@ static int lowpan_newlink(struct net *src_net, struct net_device *dev,
return -EINVAL;
}
- lowpan_dev_info(dev)->real_dev = real_dev;
- mutex_init(&lowpan_dev_info(dev)->dev_list_mtx);
-
- entry = kzalloc(sizeof(*entry), GFP_KERNEL);
- if (!entry) {
+ if (real_dev->ieee802154_ptr->lowpan_dev) {
dev_put(real_dev);
- lowpan_dev_info(dev)->real_dev = NULL;
- return -ENOMEM;
+ return -EBUSY;
}
- entry->ldev = dev;
-
+ lowpan_dev_info(dev)->real_dev = real_dev;
/* Set the lowpan hardware address to the wpan hardware address. */
memcpy(dev->dev_addr, real_dev->dev_addr, IEEE802154_ADDR_LEN);
- mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
- INIT_LIST_HEAD(&entry->list);
- list_add_tail(&entry->list, &lowpan_devices);
- mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);
-
ret = register_netdevice(dev);
if (ret >= 0) {
- if (!lowpan_open_count)
- lowpan_rx_init();
- lowpan_open_count++;
+ real_dev->ieee802154_ptr->lowpan_dev = dev;
+ lowpan_rx_init();
}
return ret;
@@ -167,27 +151,12 @@ static void lowpan_dellink(struct net_device *dev, struct list_head *head)
{
struct lowpan_dev_info *lowpan_dev = lowpan_dev_info(dev);
struct net_device *real_dev = lowpan_dev->real_dev;
- struct lowpan_dev_record *entry, *tmp;
ASSERT_RTNL();
- lowpan_open_count--;
- if (!lowpan_open_count)
- lowpan_rx_exit();
-
- mutex_lock(&lowpan_dev_info(dev)->dev_list_mtx);
- list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
- if (entry->ldev == dev) {
- list_del(&entry->list);
- kfree(entry);
- }
- }
- mutex_unlock(&lowpan_dev_info(dev)->dev_list_mtx);
-
- mutex_destroy(&lowpan_dev_info(dev)->dev_list_mtx);
-
- unregister_netdevice_queue(dev, head);
-
+ lowpan_rx_exit();
+ real_dev->ieee802154_ptr->lowpan_dev = NULL;
+ unregister_netdevice(dev);
dev_put(real_dev);
}
@@ -214,19 +183,21 @@ static int lowpan_device_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
- LIST_HEAD(del_list);
- struct lowpan_dev_record *entry, *tmp;
if (dev->type != ARPHRD_IEEE802154)
goto out;
- if (event == NETDEV_UNREGISTER) {
- list_for_each_entry_safe(entry, tmp, &lowpan_devices, list) {
- if (lowpan_dev_info(entry->ldev)->real_dev == dev)
- lowpan_dellink(entry->ldev, &del_list);
- }
-
- unregister_netdevice_many(&del_list);
+ switch (event) {
+ case NETDEV_UNREGISTER:
+ /* Check if wpan interface is unregistered that we
+ * also delete possible lowpan interfaces which belongs
+ * to the wpan interface.
+ */
+ if (dev->ieee802154_ptr && dev->ieee802154_ptr->lowpan_dev)
+ lowpan_dellink(dev->ieee802154_ptr->lowpan_dev, NULL);
+ break;
+ default:
+ break;
}
out:
diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
index 4be1d289ab2d..d6f5e8ee6fda 100644
--- a/net/ieee802154/6lowpan/rx.c
+++ b/net/ieee802154/6lowpan/rx.c
@@ -15,36 +15,14 @@
#include "6lowpan_i.h"
-static int lowpan_give_skb_to_devices(struct sk_buff *skb,
- struct net_device *dev)
+static int lowpan_give_skb_to_device(struct sk_buff *skb,
+ struct net_device *dev)
{
- struct lowpan_dev_record *entry;
- struct sk_buff *skb_cp;
- int stat = NET_RX_SUCCESS;
-
+ skb->dev = dev->ieee802154_ptr->lowpan_dev;
skb->protocol = htons(ETH_P_IPV6);
skb->pkt_type = PACKET_HOST;
- rcu_read_lock();
- list_for_each_entry_rcu(entry, &lowpan_devices, list)
- if (lowpan_dev_info(entry->ldev)->real_dev == skb->dev) {
- skb_cp = skb_copy(skb, GFP_ATOMIC);
- if (!skb_cp) {
- kfree_skb(skb);
- rcu_read_unlock();
- return NET_RX_DROP;
- }
-
- skb_cp->dev = entry->ldev;
- stat = netif_rx(skb_cp);
- if (stat == NET_RX_DROP)
- break;
- }
- rcu_read_unlock();
-
- consume_skb(skb);
-
- return stat;
+ return netif_rx(skb);
}
static int
@@ -109,7 +87,7 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
if (skb->data[0] == LOWPAN_DISPATCH_IPV6) {
/* Pull off the 1-byte of 6lowpan header. */
skb_pull(skb, 1);
- return lowpan_give_skb_to_devices(skb, NULL);
+ return lowpan_give_skb_to_device(skb, dev);
} else {
switch (skb->data[0] & 0xe0) {
case LOWPAN_DISPATCH_IPHC: /* ipv6 datagram */
@@ -117,7 +95,7 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
if (ret < 0)
goto drop_skb;
- return lowpan_give_skb_to_devices(skb, NULL);
+ return lowpan_give_skb_to_device(skb, dev);
case LOWPAN_DISPATCH_FRAG1: /* first fragment header */
ret = lowpan_frag_rcv(skb, LOWPAN_DISPATCH_FRAG1);
if (ret == 1) {
@@ -125,7 +103,7 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
if (ret < 0)
goto drop_skb;
- return lowpan_give_skb_to_devices(skb, NULL);
+ return lowpan_give_skb_to_device(skb, dev);
} else if (ret == -1) {
return NET_RX_DROP;
} else {
@@ -138,7 +116,7 @@ static int lowpan_rcv(struct sk_buff *skb, struct net_device *dev,
if (ret < 0)
goto drop_skb;
- return lowpan_give_skb_to_devices(skb, NULL);
+ return lowpan_give_skb_to_device(skb, dev);
} else if (ret == -1) {
return NET_RX_DROP;
} else {
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.