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add /update/features handler for feature negotiation

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related to https://github.com/gokrazy/gokrazy/issues/52
This commit is contained in:
Michael Stapelberg 2020-04-07 09:52:12 +02:00
parent ffc8928d2e
commit 057fc9dcb0
1 changed files with 6 additions and 0 deletions
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6
update.go
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@ -109,6 +109,12 @@ func nonConcurrentSwitchHandler(newRootPartition int) func(http.ResponseWriter,
}
func initUpdate() error {
// The /update/features handler is used for negotiation of individual
// feature support (e.g. PARTUUID= support) between the packer and update
// target.
http.HandleFunc("/update/features", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(w, "partuuid,")
})
http.HandleFunc("/update/mbr", nonConcurrentUpdateHandler(rootdev.BlockDevice()))
http.HandleFunc("/update/root", nonConcurrentUpdateHandler(rootdev.Partition(rootdev.InactiveRootPartition())))
http.HandleFunc("/update/switch", nonConcurrentSwitchHandler(rootdev.InactiveRootPartition()))