SDEV_LOOKUP
int is_lookup = (cmd == SDEV_LOOKUP);
ASSERT(cmd == SDEV_LOOKUP || cmd == SDEV_READDIR);
SDEV_UNBLOCK_OTHERS(dv, SDEV_LOOKUP);
SDEV_BLOCK_OTHERS(dv, (SDEV_LOOKUP | SDEV_LGWAITING));
(SDEV_LOOKUP | SDEV_LGWAITING));
(SDEV_LOOKUP | SDEV_LGWAITING));
error = sdev_wait4lookup(dv, SDEV_LOOKUP);
SDEV_UNBLOCK_OTHERS(self, SDEV_LOOKUP);
SDEV_UNBLOCK_OTHERS(self, SDEV_LOOKUP);
SDEV_UNBLOCK_OTHERS(self, SDEV_LOOKUP);
SDEV_BLOCK_OTHERS(sdv, SDEV_LOOKUP);
SDEV_UNBLOCK_OTHERS(sdv, SDEV_LOOKUP);
(dv->sdev_lookup_flags & SDEV_LOOKUP)