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control/controlknobs,wgengine/magicsock: disable TSMP disco advert if netmap caching is disabled

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Updates #20081

Signed-off-by: Jordan Whited <jordan@tailscale.com>
This commit is contained in:
Jordan Whited
2026-06-17 18:01:25 -07:00
committed by Jordan Whited
parent 8f210454dd
commit be2f554dd3
3 changed files with 66 additions and 2 deletions
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7
control/controlknobs/controlknobs.go
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@@ -135,6 +135,11 @@ type Knobs struct {
// underlay UDP packet TX path on Linux. Applies to magicsock and peer relay
// UDP sockets. See [tailcfg.NodeAttrNeverGSOEqualTail].
NeverGSOEqualTail atomic.Bool
// CacheNetworkMaps is whether the node should persistently cache network
// maps and use them to establish peer connectivity on start, if doing so
// is supported by the client and storage is available.
CacheNetworkMaps atomic.Bool
}
// UpdateFromNodeAttributes updates k (if non-nil) based on the provided self
@@ -170,6 +175,7 @@ func (k *Knobs) UpdateFromNodeAttributes(capMap tailcfg.NodeCapMap) {
disableTUNUDPGRO = has(tailcfg.NodeAttrDisableTUNUDPGRO)
disableTUNTCPGRO = has(tailcfg.NodeAttrDisableTUNTCPGRO)
neverGSOEqualTail = has(tailcfg.NodeAttrNeverGSOEqualTail)
cacheNetworkMaps = has(tailcfg.NodeAttrCacheNetworkMaps)
)
if has(tailcfg.NodeAttrOneCGNATEnable) {
@@ -203,6 +209,7 @@ func (k *Knobs) UpdateFromNodeAttributes(capMap tailcfg.NodeCapMap) {
k.DisableTUNUDPGRO.Store(disableTUNUDPGRO)
k.DisableTUNTCPGRO.Store(disableTUNTCPGRO)
k.NeverGSOEqualTail.Store(neverGSOEqualTail)
k.CacheNetworkMaps.Store(cacheNetworkMaps)
}
// AsDebugJSON returns k as something that can be marshalled with json.Marshal