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commitff70202b2dupstream. The goal is to keep the mark during a bpf_redirect(), like it is done for legacy encapsulation / decapsulation, when there is no x-netns. This was initially done in commit213dd74aee("skbuff: Do not scrub skb mark within the same name space"). When the call to skb_scrub_packet() was added in dev_forward_skb() (commit8b27f27797("skb: allow skb_scrub_packet() to be used by tunnels")), the second argument (xnet) was set to true to force a call to skb_orphan(). At this time, the mark was always cleanned up by skb_scrub_packet(), whatever xnet value was. This call to skb_orphan() was removed later in commit9c4c325252("skbuff: preserve sock reference when scrubbing the skb."). But this 'true' stayed here without any real reason. Let's correctly set xnet in ____dev_forward_skb(), this function has access to the previous interface and to the new interface. Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net> Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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.