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net/connstats: make it modular (omittable)

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Saves only 12 KB, but notably removes some deps on packages that future
changes can then eliminate entirely.

Updates #12614

Change-Id: Ibf830d3ee08f621d0a2011b1d4cd175427ef50df
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-10-04 11:43:17 -07:00
committed by Brad Fitzpatrick
parent 2e381557b8
commit 3c7e351671
11 changed files with 97 additions and 25 deletions
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21
wgengine/netlog/netlog.go
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@@ -19,6 +19,7 @@ import (
"sync"
"time"
"tailscale.com/feature/buildfeatures"
"tailscale.com/health"
"tailscale.com/logpolicy"
"tailscale.com/logtail"
@@ -130,20 +131,24 @@ func (nl *Logger) Startup(nodeID tailcfg.StableNodeID, nodeLogID, domainLogID lo
// can upload to the Tailscale log service, so stay below this limit.
const maxLogSize = 256 << 10
const maxConns = (maxLogSize - netlogtype.MaxMessageJSONSize) / netlogtype.MaxConnectionCountsJSONSize
nl.stats = connstats.NewStatistics(pollPeriod, maxConns, func(start, end time.Time, virtual, physical map[netlogtype.Connection]netlogtype.Counts) {
nl.mu.Lock()
addrs := nl.addrs
prefixes := nl.prefixes
nl.mu.Unlock()
recordStatistics(nl.logger, nodeID, start, end, virtual, physical, addrs, prefixes, logExitFlowEnabledEnabled)
})
if buildfeatures.HasConnStats {
nl.stats = connstats.NewStatistics(pollPeriod, maxConns, func(start, end time.Time, virtual, physical map[netlogtype.Connection]netlogtype.Counts) {
nl.mu.Lock()
addrs := nl.addrs
prefixes := nl.prefixes
nl.mu.Unlock()
recordStatistics(nl.logger, nodeID, start, end, virtual, physical, addrs, prefixes, logExitFlowEnabledEnabled)
})
}
// Register the connection tracker into the TUN device.
if tun == nil {
tun = noopDevice{}
}
nl.tun = tun
nl.tun.SetStatistics(nl.stats)
if buildfeatures.HasConnStats {
nl.tun.SetStatistics(nl.stats)
}
// Register the connection tracker into magicsock.
if sock == nil {