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0a0f9a7dc6
Shared test library functions lack a simple way to ensure proper cleanup in the event of a failure. The `log_onexit` cleanup pattern cannot be used in library functions because it uses one global variable to store the cleanup command. An example of where this is a serious issue is when a tunable that artifically stalls kernel progress gets activated and then some check fails. Unless the caller knows about the tunable and sets it back, the system will be left in a bad state. To solve this problem, turn the global cleanup variable into a stack. Provide push and pop functions to add additional cleanup steps and remove them after it is safe again. The first use of this new functionality is in attempt_during_removal, which sets REMOVAL_SUSPEND_PROGRESS. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: John Kennedy <john.kennedy@delphix.com> Signed-off-by: Ryan Moeller <ryan@iXsystems.com> Closes #10080 |
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