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net: tcp: fix rx timestamp behavior for tcp_recvmsg
The stated intent of the original commit is to is to "return the timestamp corresponding to the highest sequence number data returned." The current implementation returns the timestamp for the last byte of the last fully read skb, which is not necessarily the last byte in the recv buffer. This patch converts behavior to the original definition, and to the behavior of the previous draft versions of commit 98aaa91 ("tcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg") which also match this behavior. Fixes: 98aaa91 ("tcp: Extend SOF_TIMESTAMPING_RX_SOFTWARE to TCP recvmsg") Co-developed-by: Iris Liu <[email protected]> Signed-off-by: Iris Liu <[email protected]> Signed-off-by: Kelly Littlepage <[email protected]> Signed-off-by: Eric Dumazet <[email protected]> Acked-by: Soheil Hassas Yeganeh <[email protected]> Acked-by: Willem de Bruijn <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
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