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net/netns, net/dns/resolver, etc: make netmon required in most places

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The goal is to move more network state accessors to netmon.Monitor
where they can be cheaper/cached. But first (this change and others)
we need to make sure the one netmon.Monitor is plumbed everywhere.

Some notable bits:

* tsdial.NewDialer is added, taking a now-required netmon

* because a tsdial.Dialer always has a netmon, anything taking both
  a Dialer and a NetMon is now redundant; take only the Dialer and
  get the NetMon from that if/when needed.

* netmon.NewStatic is added, primarily for tests

Updates tailscale/corp#10910
Updates tailscale/corp#18960
Updates #7967
Updates #3299

Change-Id: I877f9cb87618c4eb037cee098241d18da9c01691
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2024-04-26 22:06:20 -07:00
committed by Brad Fitzpatrick
parent 4f73a26ea5
commit 3672f29a4e
34 changed files with 228 additions and 86 deletions
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2
wgengine/router/router.go
View File

@@ -53,7 +53,7 @@ func New(logf logger.Logf, tundev tun.Device, netMon *netmon.Monitor, health *he
// CleanUp restores the system network configuration to its original state
// in case the Tailscale daemon terminated without closing the router.
// No other state needs to be instantiated before this runs.
func CleanUp(logf logger.Logf, interfaceName string) {
func CleanUp(logf logger.Logf, netMon *netmon.Monitor, interfaceName string) {
cleanUp(logf, interfaceName)
}

4
wgengine/userspace.go
View File

@@ -193,7 +193,7 @@ type Config struct {
HealthTracker *health.Tracker
// Dialer is the dialer to use for outbound connections.
// If nil, a new Dialer is created
// If nil, a new Dialer is created.
Dialer *tsdial.Dialer
// ControlKnobs is the set of control plane-provied knobs
@@ -341,7 +341,7 @@ func NewUserspaceEngine(logf logger.Logf, conf Config) (_ Engine, reterr error)
tunName, _ := conf.Tun.Name()
conf.Dialer.SetTUNName(tunName)
conf.Dialer.SetNetMon(e.netMon)
e.dns = dns.NewManager(logf, conf.DNS, e.netMon, e.health, conf.Dialer, fwdDNSLinkSelector{e, tunName}, conf.ControlKnobs)
e.dns = dns.NewManager(logf, conf.DNS, e.health, conf.Dialer, fwdDNSLinkSelector{e, tunName}, conf.ControlKnobs)
// TODO: there's probably a better place for this
sockstats.SetNetMon(e.netMon)