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From d606691d341dfffee0b02fc55fb29f74f975e775 Mon Sep 17 00:00:00 2001
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From: Thierry Bordaz <tbordaz@redhat.com>
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Date: Wed, 21 Mar 2018 18:26:16 +0100
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Subject: [PATCH] Ticket 49619 - adjustment of csn_generator can fail so next
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generated csn can be equal to the most recent one received
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Bug Description:
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On consumer side csn_generator ajustment occurs (let CSN = highest known csn)
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when a replication session starts
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when a csn is generated locally and than csn is <= CSN
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During adjustment, in the case
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there is no remote/local offset (time change)
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the current_time on the consumer is identical to CSN
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Then next locally generated csn will only differ with seqnum
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The seqnum of the csn_generator is increased only if CSN.seqnum is larger
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than the csn_generator one.
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In case of egality, it remains unchanged.
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The consequence is that the next locally generated csn will be identical to CSN (except for the RID).
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So even after csn_generator adjustment, csn_generator may create csn that are not larger than the CSN
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Fix Description:
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compare the new generated timestamp (time+offsets) with adjustment one.
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If the new is greater or EQUAL, make sure the local seqnum is ahead the remote one
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https://pagure.io/389-ds-base/issue/49619
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Reviewed by: Mark Reynolds
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Platforms tested: F27
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Flag Day: no
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Doc impact: no
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---
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ldap/servers/slapd/csngen.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/ldap/servers/slapd/csngen.c b/ldap/servers/slapd/csngen.c
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index 287ea847e..4ac45acf0 100644
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--- a/ldap/servers/slapd/csngen.c
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+++ b/ldap/servers/slapd/csngen.c
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@@ -331,7 +331,7 @@ csngen_adjust_time(CSNGen *gen, const CSN *csn)
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/* let's revisit the seq num - if the new time is > the old
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tiem, we should reset the seq number to remote + 1 if
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this won't cause a wrap around */
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- if (new_time > cur_time) {
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+ if (new_time >= cur_time) {
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/* just set seq_num regardless of whether the current one
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is < or > than the remote one - the goal of this function
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is to make sure we generate CSNs > the remote CSN - if
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--
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2.13.6
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