tcp: let tcp_mtu_probe() build headless packets
tcp_mtu_probe() is still copying payload from skbs in the write queue, using skb_copy_bits(), ignoring potential errors. Modern TCP stack wants to only deal with payload found in page frags, as this is a prereq for TCPDirect (host stack might not have access to the payload) Signed-off-by:Eric Dumazet <edumazet@google.com> Link: https://lore.kernel.org/r/20230607214113.1992947-1-edumazet@google.com Signed-off-by:
Jakub Kicinski <kuba@kernel.org>
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