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| author | James Chapman <jchapman@katalix.com> | 2010-04-02 06:18:39 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-03 14:56:02 -0700 |
| commit | 63f96072f9ba430aa348bc987c3d5a4f48bae301 (patch) | |
| tree | 7c210e4a03f09c12f302a8f4800e1258660c1068 | |
| parent | fd558d186df2c13a22455373858bae634a4795af (diff) | |
| download | linux-63f96072f9ba430aa348bc987c3d5a4f48bae301.tar.gz linux-63f96072f9ba430aa348bc987c3d5a4f48bae301.tar.bz2 linux-63f96072f9ba430aa348bc987c3d5a4f48bae301.zip | |
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>
| -rw-r--r-- | drivers/net/ppp_generic.c | 19 | ||||
| -rw-r--r-- | include/linux/ppp_channel.h | 3 |
2 files changed, 22 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); diff --git a/include/linux/ppp_channel.h b/include/linux/ppp_channel.h index 0d3fa63e90ea..bff98ec1bfed 100644 --- a/include/linux/ppp_channel.h +++ b/include/linux/ppp_channel.h @@ -72,6 +72,9 @@ extern int ppp_channel_index(struct ppp_channel *); /* Get the unit number associated with a channel, or -1 if none */ extern int ppp_unit_number(struct ppp_channel *); +/* Get the device name associated with a channel, or NULL if none */ +extern char *ppp_dev_name(struct ppp_channel *); + /* * SMP locking notes: * The channel code must ensure that when it calls ppp_unregister_channel, |