Hal Rosenstock wrote:
What stops the net_device from being pulled from underneath this ? Seems
like a similar issue to me. The difference I see is that only
net_devices need to be tracked rather than perhaps net_devices and
ib_devices.
A reference on the net_device needs to be held while this is being read.
Net_devices already have reference counting that comes with them; this would
need to be added to ib_devices. E.g.
dev = ip_dev_find(ip);
gid = dev->dev_addr + 4;
pkey = get_pkey(dev->broadcast);
dev_put(dev);
could be used to convert a local IP address to a GID/PKey.
I'm assuming that neigh_lookup() provides the same protection: that neigh->dev
is valid while a reference on the neigh is held (until neigh_release is called).
Does anyone know if this is the case?
- Sean
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