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57 lines
2.2 KiB
57 lines
2.2 KiB
From 86bd33a9f842caf1788b61d1f99e95f8ad866660 Mon Sep 17 00:00:00 2001
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From: Willy Tarreau <w@1wt.eu>
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Date: Wed, 25 Jun 2014 17:01:56 +0200
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Subject: [PATCH 6/6] BUG/MEDIUM: counters: fix track-sc* to wait on unstable
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contents
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I've been facing multiple configurations which involved track-sc* rules
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in tcp-request content without the "if ..." to force it to wait for the
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contents, resulting in random behaviour with contents sometimes retrieved
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and sometimes not.
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Reading the doc doesn't make it clear either that the tracking will be
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performed only if data are already there and that waiting on an ACL is
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the only way to avoid this.
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Since this behaviour is not natural and we now have the ability to fix
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it, this patch ensures that if input data are still moving, instead of
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silently dropping them, we naturally wait for them to stabilize up to
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the inspect-delay. This way it's not needed anymore to implement an
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ACL-based condition to force to wait for data, eventhough the behaviour
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is not changed for when an ACL is present.
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The most obvious usage will be when track-sc is followed by any HTTP
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sample expression, there's no need anymore for adding "if HTTP".
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It's probably worth backporting this to 1.5 to avoid further configuration
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issues. Note that it requires previous patch.
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(cherry picked from commit 1b71eb581ec1637879f725421efb95ad69f0ea4f)
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---
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src/proto_tcp.c | 6 +++++-
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1 file changed, 5 insertions(+), 1 deletion(-)
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diff --git a/src/proto_tcp.c b/src/proto_tcp.c
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index 1aac0d9..e9dbc9c 100644
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--- a/src/proto_tcp.c
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+++ b/src/proto_tcp.c
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@@ -1022,12 +1022,16 @@ int tcp_inspect_request(struct session *s, struct channel *req, int an_bit)
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* applies.
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*/
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struct stktable_key *key;
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+ struct sample smp;
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if (stkctr_entry(&s->stkctr[tcp_trk_idx(rule->action)]))
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continue;
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t = rule->act_prm.trk_ctr.table.t;
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- key = stktable_fetch_key(t, s->be, s, &s->txn, SMP_OPT_DIR_REQ|SMP_OPT_FINAL, rule->act_prm.trk_ctr.expr, NULL);
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+ key = stktable_fetch_key(t, s->be, s, &s->txn, SMP_OPT_DIR_REQ | partial, rule->act_prm.trk_ctr.expr, &smp);
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+
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+ if (smp.flags & SMP_F_MAY_CHANGE)
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+ goto missing_data;
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if (key && (ts = stktable_get_entry(t, key))) {
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session_track_stkctr(&s->stkctr[tcp_trk_idx(rule->action)], t, ts);
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--
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1.8.5.5
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