[dpdk-dev] [PATCH v3 2/5] drivers/net/pcap: add public api to create pcap device

[Reshma Pattan <reshma.pattan@intel.com>]

Added new public api to create pcap device from pcaps.
Added new header file for API declaration.
Added new public api to version map

Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
---
 drivers/net/pcap/Makefile                 |    4 +-
 drivers/net/pcap/rte_eth_pcap.c           |  156 +++++++++++++++++++++++++---
 drivers/net/pcap/rte_eth_pcap.h           |   87 ++++++++++++++++
 drivers/net/pcap/rte_pmd_pcap_version.map |    7 ++
 4 files changed, 235 insertions(+), 19 deletions(-)
 create mode 100644 drivers/net/pcap/rte_eth_pcap.h

diff --git a/drivers/net/pcap/Makefile b/drivers/net/pcap/Makefile
index b41d8a2..8e424bf 100644
--- a/drivers/net/pcap/Makefile
+++ b/drivers/net/pcap/Makefile
@@ -1,6 +1,6 @@
 #   BSD LICENSE
 #
-#   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+#   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
 #   Copyright(c) 2014 6WIND S.A.
 #   All rights reserved.
 #
@@ -53,7 +53,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += rte_eth_pcap.c
 #
 # Export include files
 #
-SYMLINK-y-include +=
+SYMLINK-y-include += rte_eth_pcap.h
 
 # this lib depends upon:
 DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += lib/librte_mbuf
diff --git a/drivers/net/pcap/rte_eth_pcap.c b/drivers/net/pcap/rte_eth_pcap.c
index f9230eb..b7b9fd9 100644
--- a/drivers/net/pcap/rte_eth_pcap.c
+++ b/drivers/net/pcap/rte_eth_pcap.c
@@ -1,7 +1,7 @@
 /*-
  *   BSD LICENSE
  *
- *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
  *   Copyright(c) 2014 6WIND S.A.
  *   All rights reserved.
  *
@@ -44,7 +44,7 @@
 
 #include <net/if.h>
 
-#include <pcap.h>
+#include "rte_eth_pcap.h"
 
 #define RTE_ETH_PCAP_SNAPSHOT_LEN 65535
 #define RTE_ETH_PCAP_SNAPLEN ETHER_MAX_JUMBO_FRAME_LEN
@@ -85,21 +85,6 @@ struct pcap_tx_queue {
 	char type[ETH_PCAP_ARG_MAXLEN];
 };
 
-struct rx_pcaps {
-	unsigned num_of_rx;
-	pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
-	const char *names[RTE_PMD_RING_MAX_RX_RINGS];
-	const char *types[RTE_PMD_RING_MAX_RX_RINGS];
-};
-
-struct tx_pcaps {
-	unsigned num_of_tx;
-	pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
-	pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
-	const char *names[RTE_PMD_RING_MAX_RX_RINGS];
-	const char *types[RTE_PMD_RING_MAX_RX_RINGS];
-};
-
 struct pmd_internals {
 	struct pcap_rx_queue rx_queue[RTE_PMD_RING_MAX_RX_RINGS];
 	struct pcap_tx_queue tx_queue[RTE_PMD_RING_MAX_TX_RINGS];
@@ -875,6 +860,143 @@ error:
 	return -1;
 }
 
+int
+rte_eth_from_pcapsndumpers(const char *name,
+		struct rx_pcaps *rx_queues,
+		const unsigned nb_rx_queues,
+		struct tx_pcaps *tx_queues,
+		const unsigned nb_tx_queues,
+		const unsigned numa_node)
+{
+	struct rte_eth_dev_data *data = NULL;
+	struct pmd_internals *internals = NULL;
+	struct rte_eth_dev *eth_dev = NULL;
+	unsigned i;
+	pcap_dumper_t *dumper;
+	pcap_t *pcap = NULL;
+
+	hz = rte_get_timer_hz();
+	/* do some parameter checking */
+	if (!rx_queues && nb_rx_queues > 0)
+		return -1;
+	if (!tx_queues && nb_tx_queues > 0)
+		return -1;
+
+	/* initialize rx and tx pcaps */
+	for (i = 0; i < nb_rx_queues; i++) {
+		if (open_single_rx_pcap(rx_queues->names[i], &pcap) < 0)
+			return -1;
+		rx_queues->pcaps[i] = pcap;
+	}
+	for (i = 0; i < nb_tx_queues; i++) {
+		if (open_single_tx_pcap(tx_queues->names[i], &dumper) < 0)
+			return -1;
+		tx_queues->dumpers[i] = dumper;
+	}
+
+	RTE_LOG(INFO, PMD, "Creating pcap-backed ethdev on numa socket %u\n", numa_node);
+
+	/* now do all data allocation - for eth_dev structure, dummy pci driver
+	 * and internal (private) data
+	 */
+	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+	if (!data)
+		goto error;
+
+	if (nb_rx_queues) {
+		data->rx_queues = rte_zmalloc_socket(name, sizeof(void *) * nb_rx_queues,
+				0, numa_node);
+		if (!data->rx_queues)
+			goto error;
+	}
+
+	if (nb_tx_queues) {
+		data->tx_queues = rte_zmalloc_socket(name, sizeof(void *) * nb_tx_queues,
+				0, numa_node);
+		if (!data->tx_queues)
+			goto error;
+	}
+
+	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
+	if (!internals)
+		goto error;
+
+	/* reserve an ethdev entry */
+	eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
+	if (!eth_dev)
+		goto error;
+
+	/* check length of device name */
+	if ((strlen(eth_dev->data->name) + 1) > sizeof(data->name))
+		goto error;
+
+	/* now put it all together
+	 * - store queue data in internals,
+	 * - store numa_node info in eth_dev_data
+	 * - point eth_dev_data to internals
+	 * - and point eth_dev structure to new eth_dev_data structure
+	 */
+	internals->nb_rx_queues = nb_rx_queues;
+	internals->nb_tx_queues = nb_tx_queues;
+	internals->if_index = if_nametoindex(name);
+
+	data->dev_private = internals;
+	data->port_id = eth_dev->data->port_id;
+	strncpy(data->name, eth_dev->data->name, strlen(eth_dev->data->name));
+	data->nb_rx_queues = (uint16_t)nb_rx_queues;
+	data->nb_tx_queues = (uint16_t)nb_tx_queues;
+	data->dev_link = pmd_link;
+	data->mac_addrs = &eth_addr;
+
+	strncpy(data->name,
+		eth_dev->data->name, strlen(eth_dev->data->name));
+	eth_dev->data = data;
+	eth_dev->driver = NULL;
+	eth_dev->dev_ops = &ops;
+	eth_dev->data->dev_flags = RTE_ETH_DEV_DETACHABLE;
+	eth_dev->data->kdrv = RTE_KDRV_NONE;
+	eth_dev->data->drv_name = drivername;
+	eth_dev->data->numa_node = numa_node;
+
+	for (i = 0; i < nb_rx_queues; i++) {
+		internals->rx_queue[i].pcap = rx_queues->pcaps[i];
+		snprintf(internals->rx_queue[i].name,
+			sizeof(internals->rx_queue[i].name), "%s",
+			rx_queues->names[i]);
+		snprintf(internals->rx_queue[i].type,
+			sizeof(internals->rx_queue[i].type), "%s",
+			rx_queues->types[i]);
+	}
+	for (i = 0; i < nb_tx_queues; i++) {
+		internals->tx_queue[i].dumper = tx_queues->dumpers[i];
+		snprintf(internals->tx_queue[i].name,
+			sizeof(internals->tx_queue[i].name), "%s",
+			tx_queues->names[i]);
+		snprintf(internals->tx_queue[i].type,
+			sizeof(internals->tx_queue[i].type), "%s",
+			tx_queues->types[i]);
+	}
+
+	/* using multiple pcaps/interfaces */
+	internals->single_iface = 0;
+
+	/* finally assign rx and tx ops */
+	eth_dev->rx_pkt_burst = eth_pcap_rx;
+	eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
+
+	return data->port_id;
+
+error:
+	if (data) {
+		rte_free(data->rx_queues);
+		rte_free(data->tx_queues);
+	}
+	rte_free(data);
+	rte_free(internals);
+
+	return -1;
+}
+
 static int
 rte_eth_from_pcaps_n_dumpers(const char *name,
 		struct rx_pcaps *rx_queues,
diff --git a/drivers/net/pcap/rte_eth_pcap.h b/drivers/net/pcap/rte_eth_pcap.h
new file mode 100644
index 0000000..5bcfb5d
--- /dev/null
+++ b/drivers/net/pcap/rte_eth_pcap.h
@@ -0,0 +1,87 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2016 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_ETH_PCAP_H_
+#define _RTE_ETH_PCAP_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <pcap.h>
+
+struct rx_pcaps {
+	unsigned num_of_rx;
+	pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *names[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *types[RTE_PMD_RING_MAX_RX_RINGS];
+};
+
+struct tx_pcaps {
+	unsigned num_of_tx;
+	pcap_dumper_t *dumpers[RTE_PMD_RING_MAX_TX_RINGS];
+	pcap_t *pcaps[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *names[RTE_PMD_RING_MAX_RX_RINGS];
+	const char *types[RTE_PMD_RING_MAX_RX_RINGS];
+};
+
+/**
+ * Create a new ethdev port from pcaps
+ *
+ * @param name
+ *    name to be given to the new ethdev port
+ * @param rx_queues
+ *    pointer to array of pcaps to be used as RX queues
+ * @param nb_rx_queues
+ *    number of elements in the rx_queues array
+ * @param tx_queues
+ *    pointer to array of pcaps to be used as TX queues
+ * @param nb_tx_queues
+ *    number of elements in the tx_queues array
+ * @param numa_node
+ *    the numa node on which the memory for this port is to be allocated
+ * @return
+ *    the port number of the newly created the ethdev or -1 on error.
+ */
+int rte_eth_from_pcapsndumpers(const char *name,
+				struct rx_pcaps *rx_queues,
+				const unsigned nb_rx_queues,
+				struct tx_pcaps *tx_queues,
+				const unsigned nb_tx_queues,
+				const unsigned numa_node);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/drivers/net/pcap/rte_pmd_pcap_version.map b/drivers/net/pcap/rte_pmd_pcap_version.map
index ef35398..bffc35b 100644
--- a/drivers/net/pcap/rte_pmd_pcap_version.map
+++ b/drivers/net/pcap/rte_pmd_pcap_version.map
@@ -2,3 +2,10 @@ DPDK_2.0 {
 
 	local: *;
 };
+
+DPDK_16.04 {
+	global:
+
+	rte_eth_from_pcapsndumpers;
+
+} DPDK_2.0;
-- 
1.7.4.1