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authorJames Chapman <jchapman@katalix.com>2010-04-02 10:18:39 +0400
committerDavid S. Miller <davem@davemloft.net>2010-04-04 01:56:02 +0400
commit63f96072f9ba430aa348bc987c3d5a4f48bae301 (patch)
tree7c210e4a03f09c12f302a8f4800e1258660c1068 /drivers/net/ppp_generic.c
parentfd558d186df2c13a22455373858bae634a4795af (diff)
downloadlinux-63f96072f9ba430aa348bc987c3d5a4f48bae301.tar.xz
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 <jchapman@katalix.com> Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ppp_generic.c')
-rw-r--r--drivers/net/ppp_generic.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/ppp_generic.c b/drivers/net/ppp_generic.c
index 6d61602208c1..8a0dd8a843a9 100644
--- a/drivers/net/ppp_generic.c
+++ b/drivers/net/ppp_generic.c
@@ -2163,6 +2163,24 @@ int ppp_unit_number(struct ppp_channel *chan)
}
/*
+ * 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);