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dll: acquire exclusive lock during flush volume

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This commit is contained in:
Bill Zissimopoulos 2016-08-22 01:04:07 -07:00
parent 82e4dcb4a1
commit b88b2ec51d
2 changed files with 5 additions and 2 deletions
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3
inc/winfsp/winfsp.h
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@ -105,7 +105,8 @@ typedef NTSTATUS FSP_FILE_SYSTEM_OPERATION(FSP_FILE_SYSTEM *,
* The fine-grained concurrency model applies the exclusive-shared lock as
* follows:
* <ul>
* <li>EXCL: SetVolumeLabel, Create, Cleanup(Delete), SetInformation(Rename)</li>
* <li>EXCL: SetVolumeLabel, Flush(Volume),
* Create, Cleanup(Delete), SetInformation(Rename)</li>
* <li>SHRD: GetVolumeInfo, Open, SetInformation(Disposition), ReadDirectory</li>
* <li>NONE: all other operations</li>
* </ul>

4
src/dll/fsop.c
View File

@ -29,7 +29,9 @@ FSP_API NTSTATUS FspFileSystemOpEnter(FSP_FILE_SYSTEM *FileSystem,
Request->Req.Cleanup.Delete) ||
(FspFsctlTransactSetInformationKind == Request->Kind &&
10/*FileRenameInformation*/ == Request->Req.SetInformation.FileInformationClass) ||
FspFsctlTransactSetVolumeInformationKind == Request->Kind)
FspFsctlTransactSetVolumeInformationKind == Request->Kind ||
(FspFsctlTransactFlushBuffersKind == Request->Kind &&
0 == Request->Req.FlushBuffers.UserContext))
{
AcquireSRWLockExclusive(&FileSystem->OpGuardLock);
}