From 63f96072f9ba430aa348bc987c3d5a4f48bae301 Mon Sep 17 00:00:00 2001 From: James Chapman Date: Fri, 2 Apr 2010 06:18:39 +0000 Subject: ppp: Add ppp_dev_name() exported function ppp_dev_name() gives PPP users visibility of a ppp channel's device name. This can be used by L2TP drivers to dump the assigned PPP interface name. Signed-off-by: James Chapman Reviewed-by: Randy Dunlap Signed-off-by: David S. Miller --- drivers/net/ppp_generic.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'drivers') diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c index 6d61602208c..8a0dd8a843a 100644 --- a/drivers/net/ppp_generic.c +++ b/drivers/net/ppp_generic.c @@ -2162,6 +2162,24 @@ int ppp_unit_number(struct ppp_channel *chan) return unit; } +/* + * Return the PPP device interface name of a channel. + */ +char *ppp_dev_name(struct ppp_channel *chan) +{ + struct channel *pch = chan->ppp; + char *name = NULL; + + if (pch) { + read_lock_bh(&pch->upl); + if (pch->ppp && pch->ppp->dev) + name = pch->ppp->dev->name; + read_unlock_bh(&pch->upl); + } + return name; +} + + /* * Disconnect a channel from the generic layer. * This must be called in process context. @@ -2890,6 +2908,7 @@ EXPORT_SYMBOL(ppp_register_channel); EXPORT_SYMBOL(ppp_unregister_channel); EXPORT_SYMBOL(ppp_channel_index); EXPORT_SYMBOL(ppp_unit_number); +EXPORT_SYMBOL(ppp_dev_name); EXPORT_SYMBOL(ppp_input); EXPORT_SYMBOL(ppp_input_error); EXPORT_SYMBOL(ppp_output_wakeup); -- cgit v1.2.3-70-g09d2