Re: [Patch v4 0/2] MdeModulePkg/Variable/RuntimeDxe: Restore Variable Lock Protocol behavior

Wu, Hao A

For the series:
Reviewed-by: Hao A Wu <hao.a.wu@...>

Best Regards,
Hao Wu

-----Original Message-----
From: Michael D Kinney <michael.d.kinney@...>
Sent: Friday, December 11, 2020 4:01 PM
Cc: Wu, Hao A <hao.a.wu@...>; Liming Gao
<gaoliming@...>; Bret Barkelew
Subject: [Patch v4 0/2] MdeModulePkg/Variable/RuntimeDxe: Restore
Variable Lock Protocol behavior

New in V4
* Fix spelling in unit tests
* Call ValidateSetVariable() with DataSize=0, Attributes=0

New in V3
* Split into 2 patches. One for code change. Second for unit tests.
* Remove duplicate code and use ValidateSetVariable() to detect if a
variable is already locked.

The VariableLock shim currently fails if called twice because the underlying
Variable Policy engine returns an error if a policy is set on an existing variable.

This breaks existing code which expect it to silently pass if a variable is locked
multiple times (because it should "be locked").

Refactor the shim to confirm that the variable is indeed locked and then
change the error to EFI_SUCCESS and generate a DEBUG_ERROR message so
the duplicate lock can be reported in a debug log and removed.

Add host based unit tests for the multiple lock case using Variable Lock
Protocol, Variable Policy Protocol, and mixes of Variable Lock Protocol and
Variable Policy Protocol.

Cc: Michael D Kinney <michael.d.kinney@...>
Cc: Hao A Wu <hao.a.wu@...>
Cc: Liming Gao <gaoliming@...>
Signed-off-by: Bret Barkelew <Bret.Barkelew@...>

Bret Barkelew (1):
MdeModulePkg/Variable/RuntimeDxe: Restore Variable Lock Protocol

Michael D Kinney (1):
MdeModulePkg/Variable/RuntimeDxe: Add Variable Lock Protocol Unit

MdeModulePkg/Test/MdeModulePkgHostTest.dsc | 11 +
.../VariableLockRequestToLockUnitTest.c | 565 ++++++++++++++++++
.../VariableLockRequestToLockUnitTest.inf | 36 ++
.../RuntimeDxe/VariableLockRequestToLock.c | 95 +--
4 files changed, 671 insertions(+), 36 deletions(-) create mode 100644
create mode 100644


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