Bug 1287099

Summary: Race between mandatory lock request and ongoing read/write
Product: [Community] GlusterFS Reporter: Anoop C S <anoopcs>
Component: locksAssignee: bugs <bugs>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: mainlineCC: anoopcs, bugs
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Description Anoop C S 2015-12-01 08:57:09 EST
Description of problem:

The write call checks for a mandatory lock only once at its start.  It is therefore possible for a mandatory lock request to be granted after this check but before the data is modified. An application may then see file data changed even while a mandatory lock was held.

Similarly, an exclusive mandatory lock may be granted on a file for which a read is on going, but before the read has actually completed, and the reading application may see the file data in a state which should not have been visible to it.

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