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| author | Jon Maxwell <jmaxwell37@gmail.com> | 2018-07-19 11:14:43 +1000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-07-21 10:28:55 -0700 |
| commit | a7fa37703d495310819d0a6747e5b32362305374 (patch) | |
| tree | f404c246257679386ce9b81aa0c8e13b1f85a567 /net/ipv4 | |
| parent | 9bcc66e1983d10861deb6920fb0c151c5b01772a (diff) | |
| download | linux-stable-a7fa37703d495310819d0a6747e5b32362305374.tar.gz linux-stable-a7fa37703d495310819d0a6747e5b32362305374.tar.bz2 linux-stable-a7fa37703d495310819d0a6747e5b32362305374.zip | |
tcp: Add tcp_retransmit_stamp() helper routine
Create a seperate helper routine as per Neal Cardwells suggestion. To
be used by the final commit in this series and retransmits_timed_out().
Signed-off-by: Jon Maxwell <jmaxwell37@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp_timer.c | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/net/ipv4/tcp_timer.c b/net/ipv4/tcp_timer.c index fa34984d0b12..d212f183dd2d 100644 --- a/net/ipv4/tcp_timer.c +++ b/net/ipv4/tcp_timer.c @@ -22,6 +22,20 @@ #include <linux/gfp.h> #include <net/tcp.h> +u32 tcp_retransmit_stamp(const struct sock *sk) +{ + u32 start_ts = tcp_sk(sk)->retrans_stamp; + + if (unlikely(!start_ts)) { + struct sk_buff *head = tcp_rtx_queue_head(sk); + + if (!head) + return 0; + start_ts = tcp_skb_timestamp(head); + } + return start_ts; +} + /** * tcp_write_err() - close socket and save error info * @sk: The socket the error has appeared on. @@ -166,14 +180,9 @@ static bool retransmits_timed_out(struct sock *sk, if (!inet_csk(sk)->icsk_retransmits) return false; - start_ts = tcp_sk(sk)->retrans_stamp; - if (unlikely(!start_ts)) { - struct sk_buff *head = tcp_rtx_queue_head(sk); - - if (!head) - return false; - start_ts = tcp_skb_timestamp(head); - } + start_ts = tcp_retransmit_stamp(sk); + if (!start_ts) + return false; if (likely(timeout == 0)) { linear_backoff_thresh = ilog2(TCP_RTO_MAX/rto_base); |