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6df93462c2
The seg6_make_flowlabel() is used by seg6_do_srh_encap() to compute the flowlabel from a given skb. It relies on skb_get_hash() which eventually calls __skb_flow_dissect() to extract the flow_keys struct values from the skb. In case of IPv4 traffic, calling seg6_make_flowlabel() after skb_push(), skb_reset_network_header(), and skb_mac_header_rebuild() will results in flow_keys struct of all key values set to zero. This patch calls seg6_make_flowlabel() before resetting the headers of skb to get the right key values. Extracted Key values are based on the type inner packet as follows: 1) IPv6 traffic: src_IP, dst_IP, L4 proto, and flowlabel of inner packet. 2) IPv4 traffic: src_IP, dst_IP, L4 proto, src_port, and dst_port 3) L2 traffic: depends on what kind of traffic carried into the L2 frame. IPv6 and IPv4 traffic works as discussed 1) and 2) Here a hex_dump of struct flow_keys for IPv4 and IPv6 traffic 10.100.1.100: 47302 > 30.0.0.2: 5001 00000000: 14 00 02 00 00 00 00 00 08 00 11 00 00 00 00 00 00000010: 00 00 00 00 00 00 00 00 13 89 b8 c6 1e 00 00 02 00000020: 0a 64 01 64 fc00:a1:a > b2::2 00000000: 28 00 03 00 00 00 00 00 86 dd 11 00 99 f9 02 00 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 b2 00 00 00000020: 00 00 00 00 00 00 00 00 00 00 00 02 fc 00 00 a1 00000030: 00 00 00 00 00 00 00 00 00 00 00 0a Signed-off-by: Ahmed Abdelsalam <amsalam20@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.
See Documentation/00-INDEX for a list of what is contained in each file.
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.