tree 6bcfadb456706b7e326c46f17bff214e56181fcc
parent ffa35660017161524b7db79b0ce293fa1af16c4d
author John Fastabend <john.fastabend@gmail.com> 1521403020 -0700
committer Daniel Borkmann <daniel@iogearbox.net> 1521490478 +0100

net: do_tcp_sendpages flag to avoid SKBTX_SHARED_FRAG

When calling do_tcp_sendpages() from in kernel and we know the data
has no references from user side we can omit SKBTX_SHARED_FRAG flag.
This patch adds an internal flag, NO_SKBTX_SHARED_FRAG that can be used
to omit setting SKBTX_SHARED_FRAG.

The flag is not exposed to userspace because the sendpage call from
the splice logic masks out all bits except MSG_MORE.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>