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qga/vss-win32: Add VSS provider unregistration retry

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This commit improves the QGA VSS provider installation flow by attempting to unregister the VSS provider if it's already
found during installation. This allows for a retry of installation even if a previous unregistration failed or was not performed.
This will prevent inconsistencies between QGA and QGA-VSS versions.
Before this commit, QGA can use QGA-VSS from the previous installation.

Signed-off-by: Elizabeth Ashurov <eashurov@redhat.com>
Reviewed-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
Message-ID: <20250618091806.170110-1-eashurov@redhat.com>
Signed-off-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
This commit is contained in:
Elizabeth Ashurov 2025-06-18 12:18:06 +03:00 • committed by Kostiantyn Kostiuk
parent 012bb70cd1
commit 1c90e89e64
1 changed files with 7 additions and 3 deletions
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10
qga/vss-win32/install.cpp
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@ -287,9 +287,13 @@ STDAPI COMRegister(void)
chk(QGAProviderFind(QGAProviderCount, (void *)&count));
if (count) {
errmsg(E_ABORT, "QGA VSS Provider is already installed");
qga_debug_end;
return E_ABORT;
qga_debug("QGA VSS Provider is already installed. Attempting to unregister first.");
hr = COMUnregister();
if (FAILED(hr)) {
errmsg(hr, "Failed to unregister existing QGA VSS Provider. Aborting installation.");
qga_debug_end;
return E_ABORT;
}
}
chk(CoCreateInstance(CLSID_COMAdminCatalog, NULL, CLSCTX_INPROC_SERVER,