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Jorgen Lundman
6c2856726f
During the original ZoL port the vdev_uses_zvols() function was disabled until it could be properly implemented. This prevented a zpool from use a zvol for its slog device. This patch implements that missing functionality by adding a zvol_is_zvol() function to zvol.c. Given the full path to a device it will lookup the device and verify its major number against the registered zvol major number for the system. If they match we know the device is a zvol. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #1131