c0d59da795
Currently collect_md gre tunnel will store the tunnel info(metadata_dst) to skb_dst. And now the non-tun-dst gre tunnel already can add tunnel header through lwtunnel. When received a arp_request on the non-tun-dst gre tunnel. The packet of arp response will send through the non-tun-dst tunnel without tunnel info which will lead the arp response packet to be dropped. If the non-tun-dst gre tunnel also store the tunnel info as metadata_dst, The arp response packet will set the releted tunnel info in the iptunnel_metadata_reply. The following is the test script: ip netns add cl ip l add dev vethc type veth peer name eth0 netns cl ifconfig vethc 172.168.0.7/24 up ip l add dev tun1000 type gretap key 1000 ip link add user1000 type vrf table 1 ip l set user1000 up ip l set dev tun1000 master user1000 ifconfig tun1000 10.0.1.1/24 up ip netns exec cl ifconfig eth0 172.168.0.17/24 up ip netns exec cl ip l add dev tun type gretap local 172.168.0.17 remote 172.168.0.7 key 1000 ip netns exec cl ifconfig tun 10.0.1.7/24 up ip r r 10.0.1.7 encap ip id 1000 dst 172.168.0.17 key dev tun1000 table 1 With this patch ip netns exec cl ping 10.0.1.1 can success Signed-off-by: wenxu <wenxu@ucloud.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.