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wgengine/magicsock: rename debugPMTUD() to debugEnablePMTUD()

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Make the debugknob variable name for enabling peer path MTU discovery match the
env variable name.

Updates #311

Signed-off-by: Val <valerie@tailscale.com>
This commit is contained in:
Val 2023-09-13 16:18:35 +02:00 committed by valscale
parent bb3d338334
commit 055f3fd843
4 changed files with 8 additions and 5 deletions
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7
wgengine/magicsock/debugknobs.go
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@ -49,8 +49,11 @@
// debugRingBufferMaxSizeBytes overrides the default size of the endpoint
// history ringbuffer.
debugRingBufferMaxSizeBytes = envknob.RegisterInt("TS_DEBUG_MAGICSOCK_RING_BUFFER_MAX_SIZE_BYTES")
// debugPMTUD enables path MTU discovery. Currently only sets the Don't Fragment sockopt.
debugPMTUD = envknob.RegisterBool("TS_DEBUG_ENABLE_PMTUD")
// debugEnablePMTUD enables the peer MTU feature, which does path MTU
// discovery on UDP connections between peers. Currently (2023-09-05)
// this only turns on the don't fragment bit for the magicsock UDP
// sockets.
debugEnablePMTUD = envknob.RegisterBool("TS_DEBUG_ENABLE_PMTUD")
// Hey you! Adding a new debugknob? Make sure to stub it out in the debugknob_stubs.go
// file too.
)

2
wgengine/magicsock/debugknobs_stubs.go
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@ -20,7 +20,7 @@ func debugAlwaysDERP() bool { return false }
func debugUseDERPHTTP() bool { return false }
func debugEnableSilentDisco() bool { return false }
func debugSendCallMeUnknownPeer() bool { return false }
func debugPMTUD() bool { return false }
func debugEnablePMTUD() bool { return false }
func debugUseDERPAddr() string { return "" }
func debugUseDerpRouteEnv() string { return "" }
func debugUseDerpRoute() opt.Bool { return "" }

2
wgengine/magicsock/peermtu_darwin.go
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@ -31,5 +31,5 @@ func setDontFragment(pconn nettype.PacketConn, network string) (err error) {
}
func CanPMTUD() bool {
return debugPMTUD() // only if the envknob is for now.
return debugEnablePMTUD() // only if the envknob is for now.
}

2
wgengine/magicsock/peermtu_linux.go
View File

@ -30,5 +30,5 @@ func setDontFragment(pconn nettype.PacketConn, network string) (err error) {
}
func CanPMTUD() bool {
return debugPMTUD() // only if the envknob is enabled, for now.
return debugEnablePMTUD() // only if the envknob is enabled, for now.
}