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Windows: allow cancelling long mount operations

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Add a root-driver abort IOCTL that bypasses the mount control mutex and sets cooperative KDF abort flags for the active mount.

Restrict abort requests to privileged callers or to the user that initiated the pending mount, and retry early wait-dialog cancel requests until the driver has registered the cancellable mount context.

Wire the wait dialog Cancel button to send the abort request through a fresh driver handle, and propagate ERR_USER_ABORT through header/cache processing.

Add a /cancelmount command-line switch that sends the same abort request without displaying UI, so users can cancel hidden-wait-dialog mount operations from another process.
This commit is contained in:
Mounir IDRASSI
2026-06-07 17:14:37 +09:00
parent 105425ebb0
commit 1871765a76
13 changed files with 437 additions and 23 deletions
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src/Common/Dlgcode.h
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@@ -412,6 +412,7 @@ BOOL IsDriveAvailable (int driveNo);
BOOL IsDeviceMounted (wchar_t *deviceName);
int DriverUnmountVolume (HWND hwndDlg, int nDosDriveNo, BOOL forced);
void BroadcastDeviceChange (WPARAM message, int nDosDriveNo, DWORD driveMap);
BOOL AbortMountOperation (int nDosDriveNo);
int MountVolume (HWND hwndDlg, int driveNo, wchar_t *volumePath, Password *password, int pkcs5, int pim, BOOL cachePassword, BOOL cachePim, BOOL sharedAccess, const MountOptions* const mountOptions, BOOL quiet, BOOL bReportWrongPassword);
BOOL UnmountVolume (HWND hwndDlg , int nDosDriveNo, BOOL forceUnmount);
BOOL UnmountVolumeAfterFormatExCall (HWND hwndDlg, int nDosDriveNo);