C++ rte_panic函数代码示例

int main(void)
{
    int ret;
    struct cmdline *cl;
    int     param_num = 8;
    char *param[] = {"anscli",
                               "-c",
                               "1",
                               "-n",
                               "1",
                               "--no-pci",
                               "--socket-mem=1",
                               "--proc-type=secondary",
                               NULL};


    rte_set_log_level(RTE_LOG_ERR);
    ret = rte_eal_init(param_num, param);
    if (ret < 0)
        rte_panic("Cannot init EAL\n");

    ret = anscli_ring_init();
    if(ret != 0)
        rte_panic("Cannot init ring\n");


    cl = cmdline_stdin_new(ip_main_ctx, "ans> ");
    if (cl == NULL)
    rte_panic("Cannot create ans cmdline instance\n");

    cmdline_interact(cl);
    cmdline_stdin_exit(cl);

    return 0;
}

static void udpi_init_rings(void)
{
	uint32_t n_swq, i;

	n_swq = udpi.n_workers ;
	RTE_LOG(INFO, USER1, "Initializing %u SW rings for ctrlmsg\n", n_swq);

	udpi.msg_rings = (struct rte_ring**)rte_malloc_socket(NULL, n_swq * sizeof(struct rte_ring *),
		RTE_CACHE_LINE_SIZE, rte_socket_id());
	if (udpi.msg_rings == NULL)
		rte_panic("Cannot allocate memory to store ring pointers\n");

	for (i = 0; i < n_swq; i++) {
		struct rte_ring *ring;
		char name[32];

		snprintf(name, sizeof(name), "udpi_ctrlmsg_%u", i);

		ring = rte_ring_create(
			name,
			16,
			rte_socket_id(),
			RING_F_SC_DEQ|RING_F_SP_ENQ);

		if (ring == NULL)
			rte_panic("Cannot create ctrlmsg ring %u\n", i);

		udpi.msg_rings[i] = ring;
	}
}

/*
 * Send a message to a slave lcore identified by slave_id to call a
 * function f with argument arg. Once the execution is done, the
 * remote lcore switch in FINISHED state.
 */
int
rte_eal_remote_launch(int (*f)(void *), void *arg, unsigned slave_id)
{
	int n;
	char c = 0;
	int m2s = lcore_config[slave_id].pipe_master2slave[1];
	int s2m = lcore_config[slave_id].pipe_slave2master[0];

	if (lcore_config[slave_id].state != WAIT)
		return -EBUSY;

	lcore_config[slave_id].f = f;
	lcore_config[slave_id].arg = arg;

	/* send message */
	n = 0;
	while (n == 0 || (n < 0 && errno == EINTR))
		n = write(m2s, &c, 1);
	if (n < 0)
		rte_panic("cannot write on configuration pipe\n");

	/* wait ack */
	do {
		n = read(s2m, &c, 1);
	} while (n < 0 && errno == EINTR);

	if (n <= 0)
		rte_panic("cannot read on configuration pipe\n");

	return 0;
}

static void
app_init_lpm_tables(void)
{
	unsigned socket, lcore;

	/* Init the LPM tables */
	for (socket = 0; socket < APP_MAX_SOCKETS; socket ++) {
		char name[32];
		uint32_t rule;

		if (app_is_socket_used(socket) == 0) {
			continue;
		}

		struct rte_lpm_config lpm_config;

		lpm_config.max_rules = APP_MAX_LPM_RULES;
		lpm_config.number_tbl8s = 256;
		lpm_config.flags = 0;
		snprintf(name, sizeof(name), "lpm_table_%u", socket);
		printf("Creating the LPM table for socket %u ...\n", socket);
		app.lpm_tables[socket] = rte_lpm_create(
			name,
			socket,
			&lpm_config);
		if (app.lpm_tables[socket] == NULL) {
			rte_panic("Unable to create LPM table on socket %u\n", socket);
		}

		for (rule = 0; rule < app.n_lpm_rules; rule ++) {
			int ret;

			ret = rte_lpm_add(app.lpm_tables[socket],
				app.lpm_rules[rule].ip,
				app.lpm_rules[rule].depth,
				app.lpm_rules[rule].if_out);

			if (ret < 0) {
				rte_panic("Unable to add entry %u (%x/%u => %u) to the LPM table on socket %u (%d)\n",
					(unsigned) rule,
					(unsigned) app.lpm_rules[rule].ip,
					(unsigned) app.lpm_rules[rule].depth,
					(unsigned) app.lpm_rules[rule].if_out,
					socket,
					ret);
			}
		}

	}

	for (lcore = 0; lcore < APP_MAX_LCORES; lcore ++) {
		if (app.lcore_params[lcore].type != e_APP_LCORE_WORKER) {
			continue;
		}

		socket = rte_lcore_to_socket_id(lcore);
		app.lcore_params[lcore].worker.lpm_table = app.lpm_tables[socket];
	}
}

static void
app_init_ports(void)
{
	uint32_t i;

	/* Init NIC ports, then start the ports */
	for (i = 0; i < app.n_ports; i++) {
		uint16_t port;
		int ret;

		port = app.ports[i];
		RTE_LOG(INFO, USER1, "Initializing NIC port %u ...\n", port);

		/* Init port */
		ret = rte_eth_dev_configure(
			port,
			1,
			1,
			&port_conf);
		if (ret < 0)
			rte_panic("Cannot init NIC port %u (%d)\n", port, ret);

		rte_eth_promiscuous_enable(port);

		/* Init RX queues */
		ret = rte_eth_rx_queue_setup(
			port,
			0,
			app.port_rx_ring_size,
			rte_eth_dev_socket_id(port),
			&rx_conf,
			app.pool);
		if (ret < 0)
			rte_panic("Cannot init RX for port %u (%d)\n",
				(uint32_t) port, ret);

		/* Init TX queues */
		ret = rte_eth_tx_queue_setup(
			port,
			0,
			app.port_tx_ring_size,
			rte_eth_dev_socket_id(port),
			&tx_conf);
		if (ret < 0)
			rte_panic("Cannot init TX for port %u (%d)\n",
				(uint32_t) port, ret);

		/* Start port */
		ret = rte_eth_dev_start(port);
		if (ret < 0)
			rte_panic("Cannot start port %u (%d)\n", port, ret);
	}

	app_ports_check_link();
}

void
app_ping(void)
{
	unsigned i;
	uint64_t timestamp, diff_tsc;

	const uint64_t timeout = rte_get_tsc_hz() * APP_PING_TIMEOUT_SEC;

	for (i = 0; i < RTE_MAX_LCORE; i++) {
		struct app_core_params *p = &app.cores[i];
		struct rte_ring *ring_req, *ring_resp;
		void *msg;
		struct app_msg_req *req;
		int status;

		if ((p->core_type != APP_CORE_FC) &&
		    (p->core_type != APP_CORE_FW) &&
			(p->core_type != APP_CORE_RT) &&
			(p->core_type != APP_CORE_RX))
			continue;

		ring_req = app_get_ring_req(p->core_id);
		ring_resp = app_get_ring_resp(p->core_id);

		/* Fill request message */
		msg = (void *)rte_ctrlmbuf_alloc(app.msg_pool);
		if (msg == NULL)
			rte_panic("Unable to allocate new message\n");

		req = (struct app_msg_req *)
				rte_ctrlmbuf_data((struct rte_mbuf *)msg);
		req->type = APP_MSG_REQ_PING;

		/* Send request */
		do {
			status = rte_ring_sp_enqueue(ring_req, msg);
		} while (status == -ENOBUFS);

		/* Wait for response */
		timestamp = rte_rdtsc();
		do {
			status = rte_ring_sc_dequeue(ring_resp, &msg);
			diff_tsc = rte_rdtsc() - timestamp;

			if (unlikely(diff_tsc > timeout))
				rte_panic("Core %u of type %d does not respond "
					"to requests\n", p->core_id,
					p->core_type);
		} while (status != 0);

		/* Free message buffer */
		rte_ctrlmbuf_free(msg);
	}
}

/* create memory configuration in shared/mmap memory. Take out
 * a write lock on the memsegs, so we can auto-detect primary/secondary.
 * This means we never close the file while running (auto-close on exit).
 * We also don't lock the whole file, so that in future we can use read-locks
 * on other parts, e.g. memzones, to detect if there are running secondary
 * processes. */
static void
rte_eal_config_create(void)
{
	void *rte_mem_cfg_addr;
	int retval;

	const char *pathname = eal_runtime_config_path();

	if (internal_config.no_shconf)
		return;

	/* map the config before hugepage address so that we don't waste a page */
	if (internal_config.base_virtaddr != 0)
		rte_mem_cfg_addr = (void *)
			RTE_ALIGN_FLOOR(internal_config.base_virtaddr -
			sizeof(struct rte_mem_config), sysconf(_SC_PAGE_SIZE));
	else
		rte_mem_cfg_addr = NULL;

	if (mem_cfg_fd < 0){
		mem_cfg_fd = open(pathname, O_RDWR | O_CREAT, 0660);
		if (mem_cfg_fd < 0)
			rte_panic("Cannot open '%s' for rte_mem_config\n", pathname);
	}

	retval = ftruncate(mem_cfg_fd, sizeof(*rte_config.mem_config));
	if (retval < 0){
		close(mem_cfg_fd);
		rte_panic("Cannot resize '%s' for rte_mem_config\n", pathname);
	}

	retval = fcntl(mem_cfg_fd, F_SETLK, &wr_lock);
	if (retval < 0){
		close(mem_cfg_fd);
		rte_exit(EXIT_FAILURE, "Cannot create lock on '%s'. Is another primary "
				"process running?\n", pathname);
	}

	rte_mem_cfg_addr = mmap(rte_mem_cfg_addr, sizeof(*rte_config.mem_config),
				PROT_READ | PROT_WRITE, MAP_SHARED, mem_cfg_fd, 0);

	if (rte_mem_cfg_addr == MAP_FAILED){
		rte_panic("Cannot mmap memory for rte_config\n");
	}
	memcpy(rte_mem_cfg_addr, &early_mem_config, sizeof(early_mem_config));
	rte_config.mem_config = (struct rte_mem_config *) rte_mem_cfg_addr;

	/* store address of the config in the config itself so that secondary
	 * processes could later map the config into this exact location */
	rte_config.mem_config->mem_cfg_addr = (uintptr_t) rte_mem_cfg_addr;

}

void
app_init_nics(void) {
#ifndef RTE_VERSION_NUM
  /* Init driver */
  printf("Initializing the PMD driver ...\n");
  if (rte_pmd_init_all() < 0) {
    rte_panic("Cannot init PMD\n");
  }
#elif RTE_VERSION < RTE_VERSION_NUM(1, 8, 0, 0)
  if (rte_eal_pci_probe() < 0) {
    rte_panic("Cannot probe PCI\n");
  }
#endif /* RTE_VERSION_NUM */
}

int32_t interfaceSetup(void)
{
    uint8_t portIndex = 0, portCount = rte_eth_dev_count();
    int32_t ret = 0, socket_id = -1;
    struct rte_eth_link link;

    for (portIndex = 0; portIndex < portCount; portIndex++)
    {
        /* fetch the socket Id to which the port the mapped */
        for (ret = 0; ret < GTP_MAX_NUMANODE; ret++)
        {
            if (numaNodeInfo[ret].intfTotal) {
                if (numaNodeInfo[ret].intfAvail & (1 << portIndex)) {
                    socket_id = ret;
                    break;
                }
            }
        }

        memset(&link, 0x00, sizeof(struct rte_eth_link));
        ret = rte_eth_dev_configure(portIndex, 1, 1, &portConf);
        if (unlikely(ret < 0))
        {
            rte_panic("ERROR: Dev Configure\n");
            return -1;
        }

        ret = rte_eth_rx_queue_setup(portIndex, 0, RTE_TEST_RX_DESC_DEFAULT,
                                     0, NULL, numaNodeInfo[socket_id].rx[0]);
        if (unlikely(ret < 0))
        {
            rte_panic("ERROR: Rx Queue Setup\n");
            return -2;
        }

        ret = rte_eth_tx_queue_setup(portIndex, 0, RTE_TEST_TX_DESC_DEFAULT,
                                     0, NULL);
        if (unlikely(ret < 0))
        {
            rte_panic("ERROR: Tx Queue Setup\n");
            return -3;
        }

        rte_eth_promiscuous_enable(portIndex);
        rte_eth_dev_start(portIndex);
    }

    return 0;
}

static void
app_init_mbuf_pools(void)
{
	/* Init the buffer pool */
	RTE_LOG(INFO, USER1, "Creating the mbuf pool ...\n");
	app.pool = rte_mempool_create(
		"mempool",
		app.pool_size,
		app.pool_buffer_size,
		app.pool_cache_size,
		sizeof(struct rte_pktmbuf_pool_private),
		rte_pktmbuf_pool_init, NULL,
		rte_pktmbuf_init, NULL,
		rte_socket_id(),
		0);
	if (app.pool == NULL)
		rte_panic("Cannot create mbuf pool\n");

	/* Init the indirect buffer pool */
	RTE_LOG(INFO, USER1, "Creating the indirect mbuf pool ...\n");
	app.indirect_pool = rte_mempool_create(
		"indirect mempool",
		app.pool_size,
		sizeof(struct rte_mbuf) + sizeof(struct app_pkt_metadata),
		app.pool_cache_size,
		0,
		NULL, NULL,
		rte_pktmbuf_init, NULL,
		rte_socket_id(),
		0);
	if (app.indirect_pool == NULL)
		rte_panic("Cannot create mbuf pool\n");

	/* Init the message buffer pool */
	RTE_LOG(INFO, USER1, "Creating the message pool ...\n");
	app.msg_pool = rte_mempool_create(
		"mempool msg",
		app.msg_pool_size,
		app.msg_pool_buffer_size,
		app.msg_pool_cache_size,
		0,
		NULL, NULL,
		rte_ctrlmbuf_init, NULL,
		rte_socket_id(),
		0);
	if (app.msg_pool == NULL)
		rte_panic("Cannot create message pool\n");
}

static void
app_init_kni(struct app_params *app) {
	if (app->n_pktq_kni == 0)
		return;

	rte_panic("Can not init KNI without librte_kni support.\n");
}

static inline void
vmxnet3_tq_tx_complete(vmxnet3_tx_queue_t *txq)
{
	int completed = 0;
	struct rte_mbuf *mbuf;
	vmxnet3_comp_ring_t *comp_ring = &txq->comp_ring;
	struct Vmxnet3_TxCompDesc *tcd = (struct Vmxnet3_TxCompDesc *)
		(comp_ring->base + comp_ring->next2proc);

	while (tcd->gen == comp_ring->gen) {

		/* Release cmd_ring descriptor and free mbuf */
#ifdef RTE_LIBRTE_VMXNET3_DEBUG_DRIVER
		VMXNET3_ASSERT(txq->cmd_ring.base[tcd->txdIdx].txd.eop == 1);
#endif
		mbuf = txq->cmd_ring.buf_info[tcd->txdIdx].m;
		if (unlikely(mbuf == NULL))
			rte_panic("EOP desc does not point to a valid mbuf");
		else
			rte_pktmbuf_free(mbuf);


		txq->cmd_ring.buf_info[tcd->txdIdx].m = NULL;
		/* Mark the txd for which tcd was generated as completed */
		vmxnet3_cmd_ring_adv_next2comp(&txq->cmd_ring);

		vmxnet3_comp_ring_adv_next2proc(comp_ring);
		tcd = (struct Vmxnet3_TxCompDesc *)(comp_ring->base +
						    comp_ring->next2proc);
		completed++;
	}

	PMD_TX_LOG(DEBUG, "Processed %d tx comps & command descs.", completed);
}

static int
app_install_coremask(uint64_t core_mask)
{
	uint32_t n_cores, i;

	for (n_cores = 0, i = 0; i < RTE_MAX_LCORE; i++)
		if (app.cores[i].core_type != APP_CORE_NONE)
			n_cores++;

	if (n_cores != app.n_cores) {
		rte_panic("Number of cores in COREMASK should be %u instead "
			"of %u\n", n_cores, app.n_cores);
		return -1;
	}

	for (i = 0; i < RTE_MAX_LCORE; i++) {
		uint32_t core_id;

		if (app.cores[i].core_type == APP_CORE_NONE)
			continue;

		core_id = __builtin_ctzll(core_mask);
		core_mask &= ~(1LLU << core_id);

		app.cores[i].core_id = core_id;
	}

	return 0;
}

/*
 * Resize allocated memory.
 */
void *
rte_realloc(void *ptr, size_t size, unsigned align)
{
	if (ptr == NULL)
		return rte_malloc(NULL, size, align);

	struct malloc_elem *elem = malloc_elem_from_data(ptr);
	if (elem == NULL)
		rte_panic("Fatal error: memory corruption detected\n");

	size = CACHE_LINE_ROUNDUP(size), align = CACHE_LINE_ROUNDUP(align);
	/* check alignment matches first, and if ok, see if we can resize block */
	if (RTE_PTR_ALIGN(ptr,align) == ptr &&
			malloc_elem_resize(elem, size) == 0)
		return ptr;

	/* either alignment is off, or we have no room to expand,
	 * so move data. */
	void *new_ptr = rte_malloc(NULL, size, align);
	if (new_ptr == NULL)
		return NULL;
	const unsigned old_size = elem->size - MALLOC_ELEM_OVERHEAD;
	rte_memcpy(new_ptr, ptr, old_size < size ? old_size : size);
	rte_free(ptr);

	return new_ptr;
}

void
app_main_loop_worker(void) {
	struct app_mbuf_array *worker_mbuf;
	uint32_t i;

	RTE_LOG(INFO, USER1, "Core %u is doing work (no pipeline)\n",
		rte_lcore_id());

	worker_mbuf = rte_malloc_socket(NULL, sizeof(struct app_mbuf_array),
			RTE_CACHE_LINE_SIZE, rte_socket_id());
	if (worker_mbuf == NULL)
		rte_panic("Worker thread: cannot allocate buffer space\n");

	for (i = 0; ; i = ((i + 1) & (app.n_ports - 1))) {
		int ret;

		ret = rte_ring_sc_dequeue_bulk(
			app.rings_rx[i],
			(void **) worker_mbuf->array,
			app.burst_size_worker_read);

		if (ret == -ENOENT)
			continue;

		do {
			ret = rte_ring_sp_enqueue_bulk(
				app.rings_tx[i ^ 1],
				(void **) worker_mbuf->array,
				app.burst_size_worker_write);
		} while (ret < 0);
	}
}