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| author | Mark McLoughlin <markmc@redhat.com> | 2008-08-15 15:09:56 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-08-15 19:52:19 -0700 |
| commit | e3b99556975907530aeb9745e7b3945a0da48f17 (patch) | |
| tree | 97f764e5c8587efcba64ad8d0edce9fee094e143 /include/linux/if_tun.h | |
| parent | 04a0551c87363f100b04d28d7a15a632b70e18e7 (diff) | |
| download | lwn-e3b99556975907530aeb9745e7b3945a0da48f17.tar.gz lwn-e3b99556975907530aeb9745e7b3945a0da48f17.zip | |
tun: TUNGETIFF interface to query name and flags
Add a TUNGETIFF interface so that userspace can query a
tun/tap descriptor for its name and flags.
This is needed because it is common for one app to create
a tap interface, exec another app and pass it the file
descriptor for the interface. Without TUNGETIFF the spawned
app has no way of detecting wheter the interface has e.g.
IFF_VNET_HDR set.
Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Acked-by: Max Krasnyansky <maxk@qualcomm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/if_tun.h')
| -rw-r--r-- | include/linux/if_tun.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h index 4c6307ad9fdb..8529f57ba263 100644 --- a/include/linux/if_tun.h +++ b/include/linux/if_tun.h @@ -45,6 +45,7 @@ #define TUNGETFEATURES _IOR('T', 207, unsigned int) #define TUNSETOFFLOAD _IOW('T', 208, unsigned int) #define TUNSETTXFILTER _IOW('T', 209, unsigned int) +#define TUNGETIFF _IOR('T', 210, unsigned int) /* TUNSETIFF ifr flags */ #define IFF_TUN 0x0001 |