Revision 5fdcce211b3a41c3fed229333027f59a94a2f265 authored by William Dauchy on 13 February 2020, 17:19:22 UTC, committed by David S. Miller on 14 February 2020, 15:31:48 UTC
With ipip, it is possible to create an extra interface explicitly
attached to a given physical interface:
# ip link show tunl0
4: tunl0@NONE: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ipip 0.0.0.0 brd 0.0.0.0
# ip link add tunl1 type ipip dev eth0
# ip link show tunl1
6: tunl1@eth0: <NOARP> mtu 1480 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/ipip 0.0.0.0 brd 0.0.0.0
But it is not possible with ip6tnl:
# ip link show ip6tnl0
5: ip6tnl0@NONE: <NOARP> mtu 1452 qdisc noop state DOWN mode DEFAULT group default qlen 1000
link/tunnel6 :: brd ::
# ip link add ip6tnl1 type ip6tnl dev eth0
RTNETLINK answers: File exists
This patch aims to make it possible by adding link comparaison in both
tunnel locate and lookup functions; we also modify mtu calculation when
attached to an interface with a lower mtu.
This permits to make use of x-netns communication by moving the newly
created tunnel in a given netns.
Signed-off-by: William Dauchy <w.dauchy@criteo.com>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent b32cb6f
| File | Mode | Size |
|---|---|---|
| arm | ||
| interface | ||
| acpi.h | -rw-r--r-- | 3.4 KB |
| balloon.h | -rw-r--r-- | 973 bytes |
| events.h | -rw-r--r-- | 4.3 KB |
| features.h | -rw-r--r-- | 502 bytes |
| grant_table.h | -rw-r--r-- | 9.7 KB |
| hvc-console.h | -rw-r--r-- | 518 bytes |
| hvm.h | -rw-r--r-- | 1.3 KB |
| mem-reservation.h | -rw-r--r-- | 1.5 KB |
| page.h | -rw-r--r-- | 1.3 KB |
| platform_pci.h | -rw-r--r-- | 2.0 KB |
| swiotlb-xen.h | -rw-r--r-- | 493 bytes |
| xen-front-pgdir-shbuf.h | -rw-r--r-- | 2.3 KB |
| xen-ops.h | -rw-r--r-- | 7.0 KB |
| xen.h | -rw-r--r-- | 1.3 KB |
| xenbus.h | -rw-r--r-- | 8.3 KB |
| xenbus_dev.h | -rw-r--r-- | 1.8 KB |
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