tcp: stop spurious rescue retransmissions and potential asserts
Reported by: pho@ MFC after: 3 days Reviewed By: tuexen, #transport Sponsored by: NetApp, Inc. Differential Revision: https://reviews.freebsd.org/D29970
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@ -506,6 +506,7 @@ cc_post_recovery(struct tcpcb *tp, struct tcphdr *th)
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}
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}
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/* XXXLAS: EXIT_RECOVERY ? */
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/* XXXLAS: EXIT_RECOVERY ? */
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tp->t_bytes_acked = 0;
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tp->t_bytes_acked = 0;
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tp->sackhint.delivered_data = 0;
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tp->sackhint.prr_out = 0;
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tp->sackhint.prr_out = 0;
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}
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}
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@ -872,10 +872,12 @@ tcp_sack_partialack(struct tcpcb *tp, struct tcphdr *th)
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tcp_seq highdata = tp->snd_max;
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tcp_seq highdata = tp->snd_max;
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if (tp->t_flags & TF_SENTFIN)
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if (tp->t_flags & TF_SENTFIN)
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highdata--;
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highdata--;
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if (th->th_ack != highdata)
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if (th->th_ack != highdata) {
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tp->snd_fack = th->th_ack;
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(void)tcp_sackhole_insert(tp, SEQ_MAX(th->th_ack,
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(void)tcp_sackhole_insert(tp, SEQ_MAX(th->th_ack,
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highdata - maxseg), highdata, NULL);
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highdata - maxseg), highdata, NULL);
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}
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}
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}
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(void) tp->t_fb->tfb_tcp_output(tp);
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(void) tp->t_fb->tfb_tcp_output(tp);
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}
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}
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