Date: Mon, 25 May 2020 20:07:23 +0000 (UTC) From: Michael Tuexen <tuexen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r361471 - stable/11/sys/netinet Message-ID: <202005252007.04PK7NTl018712@repo.freebsd.org>
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Author: tuexen Date: Mon May 25 20:07:23 2020 New Revision: 361471 URL: https://svnweb.freebsd.org/changeset/base/361471 Log: MFC r360878, r360942: Improve SCTP timer handling Ensure that we have a path when starting the T3 RXT timer. Modified: stable/11/sys/netinet/sctp_asconf.c stable/11/sys/netinet/sctp_indata.c stable/11/sys/netinet/sctp_input.c stable/11/sys/netinet/sctp_timer.c stable/11/sys/netinet/sctputil.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/sctp_asconf.c ============================================================================== --- stable/11/sys/netinet/sctp_asconf.c Mon May 25 20:07:13 2020 (r361470) +++ stable/11/sys/netinet/sctp_asconf.c Mon May 25 20:07:23 2020 (r361471) @@ -1032,9 +1032,14 @@ sctp_assoc_immediate_retrans(struct sctp_tcb *stcb, st (stcb->asoc.sent_queue_cnt > 0)) { struct sctp_tmit_chunk *chk; - chk = TAILQ_FIRST(&stcb->asoc.sent_queue); - sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, - stcb, chk->whoTo); + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->whoTo != NULL) { + break; + } + } + if (chk != NULL) { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); + } } } return; Modified: stable/11/sys/netinet/sctp_indata.c ============================================================================== --- stable/11/sys/netinet/sctp_indata.c Mon May 25 20:07:13 2020 (r361470) +++ stable/11/sys/netinet/sctp_indata.c Mon May 25 20:07:23 2020 (r361471) @@ -4439,7 +4439,12 @@ again: } } } - if (lchk) { + for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) { + if (lchk->whoTo != NULL) { + break; + } + } + if (lchk != NULL) { /* Assure a timer is up */ sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); @@ -5281,7 +5286,12 @@ again: } } } - if (lchk) { + for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) { + if (lchk->whoTo != NULL) { + break; + } + } + if (lchk != NULL) { /* Assure a timer is up */ sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); Modified: stable/11/sys/netinet/sctp_input.c ============================================================================== --- stable/11/sys/netinet/sctp_input.c Mon May 25 20:07:13 2020 (r361470) +++ stable/11/sys/netinet/sctp_input.c Mon May 25 20:07:23 2020 (r361471) @@ -2960,6 +2960,7 @@ sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *c { /* cp must not be used, others call this without a c-ack :-) */ struct sctp_association *asoc; + struct sctp_tmit_chunk *chk; SCTPDBG(SCTP_DEBUG_INPUT2, "sctp_handle_cookie_ack: handling COOKIE-ACK\n"); @@ -3063,11 +3064,13 @@ sctp_handle_cookie_ack(struct sctp_cookie_ack_chunk *c closed_socket: /* Toss the cookie if I can */ sctp_toss_old_cookies(stcb, asoc); - if (!TAILQ_EMPTY(&asoc->sent_queue)) { - /* Restart the timer if we have pending data */ - struct sctp_tmit_chunk *chk; - - chk = TAILQ_FIRST(&asoc->sent_queue); + /* Restart the timer if we have pending data */ + TAILQ_FOREACH(chk, &asoc->sent_queue, sctp_next) { + if (chk->whoTo != NULL) { + break; + } + } + if (chk != NULL) { sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); } } @@ -5151,6 +5154,7 @@ process_control_chunks: } else { struct mbuf *ret_buf; struct sctp_inpcb *linp; + struct sctp_tmit_chunk *chk; if (stcb) { linp = NULL; @@ -5212,14 +5216,13 @@ process_control_chunks: got_auth = 1; auth_skipped = 0; } - if (!TAILQ_EMPTY(&stcb->asoc.sent_queue)) { - /* - * Restart the timer if we have - * pending data - */ - struct sctp_tmit_chunk *chk; - - chk = TAILQ_FIRST(&stcb->asoc.sent_queue); + /* Restart the timer if we have pending data */ + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->whoTo != NULL) { + break; + } + } + if (chk != NULL) { sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); } } Modified: stable/11/sys/netinet/sctp_timer.c ============================================================================== --- stable/11/sys/netinet/sctp_timer.c Mon May 25 20:07:13 2020 (r361470) +++ stable/11/sys/netinet/sctp_timer.c Mon May 25 20:07:23 2020 (r361471) @@ -975,7 +975,12 @@ sctp_t3rxt_timer(struct sctp_inpcb *inp, /* C3. See if we need to send a Fwd-TSN */ if (SCTP_TSN_GT(stcb->asoc.advanced_peer_ack_point, stcb->asoc.last_acked_seq)) { send_forward_tsn(stcb, &stcb->asoc); - if (lchk) { + for (; lchk != NULL; lchk = TAILQ_NEXT(lchk, sctp_next)) { + if (lchk->whoTo != NULL) { + break; + } + } + if (lchk != NULL) { /* Assure a timer is up */ sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, lchk->whoTo); } Modified: stable/11/sys/netinet/sctputil.c ============================================================================== --- stable/11/sys/netinet/sctputil.c Mon May 25 20:07:13 2020 (r361470) +++ stable/11/sys/netinet/sctputil.c Mon May 25 20:07:23 2020 (r361471) @@ -1759,14 +1759,19 @@ sctp_timeout_handler(void *t) struct sctp_tmit_chunk *chk; /* - * safeguard. If there on some on the sent queue + * Safeguard. If there on some on the sent queue * somewhere but no timers running something is * wrong... so we start a timer on the first chunk * on the send queue on whatever net it is sent to. */ - chk = TAILQ_FIRST(&stcb->asoc.sent_queue); - sctp_timer_start(SCTP_TIMER_TYPE_SEND, inp, stcb, - chk->whoTo); + TAILQ_FOREACH(chk, &stcb->asoc.sent_queue, sctp_next) { + if (chk->whoTo != NULL) { + break; + } + } + if (chk != NULL) { + sctp_timer_start(SCTP_TIMER_TYPE_SEND, stcb->sctp_ep, stcb, chk->whoTo); + } } break; case SCTP_TIMER_TYPE_INIT:
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