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tcp rack: simplify computation of rsm start and end

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While there, also fix the setting of the SYN related flag.

Reviewed by:		rrs
MFC after:		1 week
Sponsored by:		Netflix, Inc.
Differential Revision:	https://reviews.freebsd.org/D35862
This commit is contained in:
Michael Tuexen 2022-08-02 12:45:56 +02:00
parent 93b8510c36
commit 1abc27dd52
1 changed files with 4 additions and 7 deletions
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11
sys/netinet/tcp_stacks/rack.c
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@ -12610,14 +12610,11 @@ rack_init(struct tcpcb *tp)
rsm->r_rtr_bytes = 0;
if (tp->t_flags & TF_SENTFIN)
rsm->r_flags |= RACK_HAS_FIN;
rsm->r_end = tp->snd_max;
if (tp->snd_una == tp->iss) {
/* The data space is one beyond snd_una */
if ((tp->snd_una == tp->iss) &&
!TCPS_HAVEESTABLISHED(tp->t_state))
rsm->r_flags |= RACK_HAS_SYN;
rsm->r_start = tp->iss;
rsm->r_end = rsm->r_start + (tp->snd_max - tp->snd_una);
} else
rsm->r_start = tp->snd_una;
rsm->r_start = tp->snd_una;
rsm->r_end = tp->snd_max;
rsm->r_dupack = 0;
if (rack->rc_inp->inp_socket->so_snd.sb_mb != NULL) {
rsm->m = sbsndmbuf(&rack->rc_inp->inp_socket->so_snd, 0, &rsm->soff);