Re: [PATCH net] tcp: tcp_get_info() should read tcp_time_stamp later

From: Eric Dumazet <redacted>
Date: Thu, 16 Mar 2017 15:43:19 -0700

From: Eric Dumazet <edumazet@google.com>

Commit b369e7fd41f7 ("tcp: make TCP_INFO more consistent") moved
lock_sock_fast() earlier in tcp_get_info()

This has the minor effect that jiffies value being sampled at the
beginning of tcp_get_info() is more likely to be off by one, and we
report big tcpi_last_data_sent values (like 0xFFFFFFFF).

Since we lock the socket, fetching tcp_time_stamp right before
doing the jiffies_to_msecs() calls is enough to remove these
wrong values.

Signed-off-by: Eric Dumazet <edumazet@google.com>

Applied, thanks Eric.