[asterisk-dev] [Code Review] 3127: Protect CEL data structures during reload and shutdown. v11 version.

[opticron]

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/branches/11/main/cel.c
<https://reviewboard.asterisk.org/r/3127/#comment20155>

    The locking and unlocking here seems excessive. Is there a reason to maintain the lock beyond iterator creation?


- opticron


On Jan. 14, 2014, 4:24 p.m., rmudgett wrote:
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> https://reviewboard.asterisk.org/r/3127/
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> (Updated Jan. 14, 2014, 4:24 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
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> Bugs: AST-1253
>     https://issues.asterisk.org/jira/browse/AST-1253
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> Repository: Asterisk
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> Description
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> The CEL data structures need to be protected during a configuration reload and shutdown.  Asterisk crashed during a shutdown because CEL events were still in flight and the CEL data structures were already destroyed.
> 
> * Protected the appset and linkedids ao2 containers using the reload_lock.  As a result appset, linkedids, and held objects don't need a lock.
> 
> * Added NULL checks before use of the appset and linkedids ao2 containers in case the CEL module is already shutdown.
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> * Fixed overloading of the linkedids held objects reference count.  During shutdown any held objects would be leaked.
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> * Fixed memory leak of linkedids held objects if the LINKEDID_END is not being tracked.  The objects in the linkedids container were not removed if the LINKEDID_END event is not used.
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> * Added access protection to the appset container during the CLI "cel show status" command.
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> * Made CEL config reload not set defaults if the cel.conf file is invalid.
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> 
> Diffs
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>   /branches/11/main/cel.c 405542 
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> Diff: https://reviewboard.asterisk.org/r/3127/diff/
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> Testing
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> * Checked CLI "cel show status" output was as expected.
> * Checked CEL logs for APP_START/APP_END/LINKEDID_END events after a call.
> * Shutdown asterisk with "core stop now" and "core stop gracefully" without any crashes.
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> Thanks,
> 
> rmudgett
> 
>

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