Hello.
On 27/05/16 13:03, Alexander Aring wrote:
Hi,
On 05/27/2016 12:05 PM, Stefan Schmidt wrote:
Hello.
On 23/05/16 21:22, Alexander Aring wrote:
In case of sending RA messages we need some way to get the short address
from an 802.15.4 6LoWPAN interface. This patch will add a temporary
debugfs entry for experimental userspace api.
Signed-off-by: Alexander Aring<aar@xxxxxxxxxxxxxx>
---
net/6lowpan/debugfs.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/net/6lowpan/debugfs.c b/net/6lowpan/debugfs.c
index acbaa3d..638ae59 100644
--- a/net/6lowpan/debugfs.c
+++ b/net/6lowpan/debugfs.c
@@ -245,6 +245,37 @@ static const struct file_operations lowpan_context_fops = {
.release = single_release,
};
+static int lowpan_short_addr_get(void *data, u64 *val)
+{
+ struct wpan_dev *wdev = data;
+
+ rtnl_lock();
+ *val = le16_to_cpu(wdev->short_addr);
+ rtnl_unlock();
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(lowpan_short_addr_fops, lowpan_short_addr_get,
+ NULL, "0x%04llx\n");
+
+static int lowpan_dev_debugfs_802154_init(const struct net_device *dev,
+ struct lowpan_dev *ldev)
+{
+ struct dentry *dentry;
+
+ if (!lowpan_is_ll(dev, LOWPAN_LLTYPE_IEEE802154))
+ return 0;
+
+ dentry = debugfs_create_file("short_addr", 0444, ldev->iface_debugfs,
+ lowpan_802154_dev(dev)->wdev->ieee802154_ptr,
+ &lowpan_short_addr_fops);
+ if (!dentry)
+ return -EINVAL;
+
+ return 0;
+}
+
int lowpan_dev_debugfs_init(struct net_device *dev)
{
struct lowpan_dev *ldev = lowpan_dev(dev);
@@ -272,6 +303,10 @@ int lowpan_dev_debugfs_init(struct net_device *dev)
goto remove_root;
}
+ ret = lowpan_dev_debugfs_802154_init(dev, ldev);
+ if (ret < 0)
+ goto remove_root;
+
return 0;
remove_root:
Reviewed-by: Stefan Schmidt<stefan@xxxxxxxxxxxxxxx>
grml, I changed this patch now to have an 802154/short_addr directory
inside the root of 6lowpan debugfs entry.
This is because Michael Richardson wrote that other L2 has also
short_addr (any kind of second L2 address type), see [0].
The question is if we ever will have support for them in Linux. But I
agree that it might be better to have an architecture that would fit for
those cases as well.
Each of them has their own "constraints" e.g. 802.15.4 2-byte length, or
sometimes 1-byte. This constraint depends on L2, so I added 802154
subdir.
OK
regards
Stefan Schmidt
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