Symbol: zpool_vdev_offline
usr/src/cmd/zpool/zpool_main.c
6040
if (zpool_vdev_offline(zhp, argv[i], istmp) != 0)
usr/src/lib/libzfs/common/libzfs.h
299
extern int zpool_vdev_offline(zpool_handle_t *, const char *, boolean_t);