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CONTAP-783849: Leak in volref and alock when snapshot restore errors out because wafliron is running

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ontap-9
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CORE
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Issue

During an ONTAP ANDU takeover hung in WAFL ARL at {}SENDHOME_DOING_COMMIT{}. The hang detector forced a panic while WAFLiron was running on an aggregate. The issue was traced to {}ods_restore_volume(){}: when snapshot restore encountered an aggregate being ironed, its error path could exit without releasing a volume reference ({}volref{}) and administrative lock ({}alock{}).
 

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