bgpd: fix default instance when leaving the hidden state. #18119
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@Mergifyio backport dev/10.3 stable/10.2 |
🟠 Waiting for conditions to match
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Can we cover this stuff with a topotest? |
Correct me if I'm wrong, but no topotest was required when the hidden default instance behavior was introduced. Now, just to fix it, a test is suddenly needed? |
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Yes, because nobody expected the issues with these changes (it wasn't/isn't a feature). But now I see we hit not the first time this area, e.g. #17861. Is this somehow related? |
When unconfiguring a default BGP instance with VPN SAFI configurations, the default BGP structure remains but enters a hidden state. Upon reconfiguration, the instance name incorrectly appears as "VIEW ?" instead of "VRF default". And the name_pretty pointer The name_pretty pointer is replaced by another one with the incorrect name. This also leads to a memory leak as the previous pointer is not properly freed. Do not rewrite the instance name. Fixes: 4d0e7a4 ("bgpd: VRF-Lite fix default bgp delete") Signed-off-by: Louis Scalbert <[email protected]>
bgp_process_queue_init() is not called in bgp_create() when leaving the
BGP instance hidden state because of the following goto:
> if (hidden) {
> bgp = bgp_old;
> goto peer_init;
> }
Upon reconfiguration of the default instance, the prefixes are never set
into a meta queue by mq_add_handler(). They are never processed for
zebra RIB installation and announcements of update/withdraw.
Do not delete the BGP process_queue when hiding.
Fixes: 4d0e7a4 ("bgpd: VRF-Lite fix default bgp delete")
Signed-off-by: Louis Scalbert <[email protected]>
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This was referenced Feb 14, 2025
This reverts commit 2ff08af. The fix is obviously wrong. Link: 2ff08af Signed-off-by: Louis Scalbert <[email protected]>
'import vrf VRF' could define a hidden bgp instance with the default AS_UNSPECIFIED (i.e. = 1) value. When a router bgp AS vrf VRF gets configured later on, replace this AS_UNSPECIFIED setting with a requested value. Fixes: 9680831 ("bgpd: fix as_pretty mem leaks when un-hiding") Signed-off-by: Alexander Skorichenko <[email protected]> Signed-off-by: Louis Scalbert <[email protected]>
Test that leaving the hidden BGP instance state is working. Signed-off-by: Louis Scalbert <[email protected]>
Upon configuration of a VRF instance that references an absent default VRF with "import vrf default", the default instance is created in hidden state. However, the default instance is not properly un-hidden when configured. Restore the behavior prior to commit below. Fixes: 9f7177a ("bgpd: fix duplicate BGP instance created with unified config") Signed-off-by: Louis Scalbert <[email protected]>
Creates the default VRF instance after the other VRF instances. The default VRF instance is created in hidden state. Check that AS number in show run is correctly written. Signed-off-by: Louis Scalbert <[email protected]>
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When unconfiguring a default BGP instance with VPN SAFI configurations,
the default BGP structure remains but enters a hidden state. Upon
reconfiguration, the instance name state is incorrect.
Fix both issues
Fixes: 4d0e7a4 ("bgpd: VRF-Lite fix default bgp delete")