sd_rtnl_call_async_cancel 596 src/libsystemd/sd-rtnl/sd-rtnl.c sd_rtnl_call_async_cancel(nl, c->serial); sd_rtnl_call_async_cancel 52 src/systemd/sd-rtnl.h int sd_rtnl_call_async_cancel(sd_rtnl *nl, uint32_t serial);