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wgengine/netstack/gro: permit building without GRO

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This only saves ~32KB in the minimal linux/amd64 binary, but it's a
step towards permitting not depending on gvisor for small builds.

Updates #17283

Change-Id: Iae8da5e9465127de354dbcaf25e794a6832d891b
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick
2025-09-25 13:19:11 -07:00
committed by Brad Fitzpatrick
parent f2b8d37436
commit b3ae1cb0cc
9 changed files with 51 additions and 8 deletions
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2
wgengine/netstack/netstack.go
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@@ -344,7 +344,7 @@ func Create(logf logger.Logf, tundev *tstun.Wrapper, e wgengine.Engine, mc *magi
}
supportedGSOKind := stack.GSONotSupported
supportedGROKind := groNotSupported
if runtime.GOOS == "linux" {
if runtime.GOOS == "linux" && buildfeatures.HasGRO {
// TODO(jwhited): add Windows support https://github.com/tailscale/corp/issues/21874
supportedGROKind = tcpGROSupported
supportedGSOKind = stack.HostGSOSupported