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Enable zdsfs to access datasets that were created after zdsfs was mounted without the need to remount zdsfs. This is done by re-reading the VTOC with every readdir system call. To ensure a consistent VTOC state the DASD device is reserved for every VTOC read and released afterwards. Signed-off-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>