diff options
Diffstat (limited to 'drivers/net/pcap')
| -rw-r--r-- | drivers/net/pcap/Makefile | 63 | ||||
| -rw-r--r-- | drivers/net/pcap/rte_eth_pcap.c | 1093 | ||||
| -rw-r--r-- | drivers/net/pcap/rte_pmd_pcap_version.map | 4 |
3 files changed, 1160 insertions, 0 deletions
diff --git a/drivers/net/pcap/Makefile b/drivers/net/pcap/Makefile new file mode 100644 index 00000000..b41d8a27 --- /dev/null +++ b/drivers/net/pcap/Makefile @@ -0,0 +1,63 @@ +# BSD LICENSE +# +# Copyright(c) 2010-2014 Intel Corporation. All rights reserved. +# Copyright(c) 2014 6WIND S.A. +# 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. + +include $(RTE_SDK)/mk/rte.vars.mk + +# +# library name +# +LIB = librte_pmd_pcap.a + +CFLAGS += -O3 +CFLAGS += $(WERROR_FLAGS) +LDLIBS += -lpcap + +EXPORT_MAP := rte_pmd_pcap_version.map + +LIBABIVER := 1 + +# +# all source are stored in SRCS-y +# +SRCS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += rte_eth_pcap.c + +# +# Export include files +# +SYMLINK-y-include += + +# this lib depends upon: +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += lib/librte_mbuf +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += lib/librte_ether +DEPDIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += lib/librte_kvargs + +include $(RTE_SDK)/mk/rte.lib.mk diff --git a/drivers/net/pcap/rte_eth_pcap.c b/drivers/net/pcap/rte_eth_pcap.c new file mode 100644 index 00000000..c98e2341 --- /dev/null +++ b/drivers/net/pcap/rte_eth_pcap.c @@ -0,0 +1,1093 @@ +/*- + * BSD LICENSE + * + * Copyright(c) 2010-2015 Intel Corporation. All rights reserved. + * Copyright(c) 2014 6WIND S.A. + * 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. + */ + +#include <time.h> +#include <rte_mbuf.h> +#include <rte_ethdev.h> +#include <rte_malloc.h> +#include <rte_memcpy.h> +#include <rte_string_fns.h> +#include <rte_cycles.h> +#include <rte_kvargs.h> +#include <rte_dev.h> + +#include <net/if.h> + +#include <pcap.h> + +#define RTE_ETH_PCAP_SNAPSHOT_LEN 65535 +#define RTE_ETH_PCAP_SNAPLEN ETHER_MAX_JUMBO_FRAME_LEN +#define RTE_ETH_PCAP_PROMISC 1 +#define RTE_ETH_PCAP_TIMEOUT -1 +#define ETH_PCAP_RX_PCAP_ARG "rx_pcap" +#define ETH_PCAP_TX_PCAP_ARG "tx_pcap" +#define ETH_PCAP_RX_IFACE_ARG "rx_iface" +#define ETH_PCAP_TX_IFACE_ARG "tx_iface" +#define ETH_PCAP_IFACE_ARG "iface" + +#define ETH_PCAP_ARG_MAXLEN 64 + +static char errbuf[PCAP_ERRBUF_SIZE]; +static unsigned char tx_pcap_data[RTE_ETH_PCAP_SNAPLEN]; +static struct timeval start_time; +static uint64_t start_cycles; +static uint64_t hz; + +struct pcap_rx_queue { + pcap_t *pcap; + uint8_t in_port; + struct rte_mempool *mb_pool; + volatile unsigned long rx_pkts; + volatile unsigned long rx_bytes; + volatile unsigned long err_pkts; + char name[PATH_MAX]; + char type[ETH_PCAP_ARG_MAXLEN]; +}; + +struct pcap_tx_queue { + pcap_dumper_t *dumper; + pcap_t *pcap; + volatile unsigned long tx_pkts; + volatile unsigned long tx_bytes; + volatile unsigned long err_pkts; + char name[PATH_MAX]; + 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]; + int if_index; + int single_iface; +}; + +const char *valid_arguments[] = { + ETH_PCAP_RX_PCAP_ARG, + ETH_PCAP_TX_PCAP_ARG, + ETH_PCAP_RX_IFACE_ARG, + ETH_PCAP_TX_IFACE_ARG, + ETH_PCAP_IFACE_ARG, + NULL +}; + +static int open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper); +static int open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap); +static int open_single_iface(const char *iface, pcap_t **pcap); + +static struct ether_addr eth_addr = { .addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 } }; +static const char *drivername = "Pcap PMD"; +static struct rte_eth_link pmd_link = { + .link_speed = ETH_SPEED_NUM_10G, + .link_duplex = ETH_LINK_FULL_DUPLEX, + .link_status = ETH_LINK_DOWN, + .link_autoneg = ETH_LINK_SPEED_FIXED, +}; + +static int +eth_pcap_rx_jumbo(struct rte_mempool *mb_pool, + struct rte_mbuf *mbuf, + const u_char *data, + uint16_t data_len) +{ + struct rte_mbuf *m = mbuf; + + /* Copy the first segment. */ + uint16_t len = rte_pktmbuf_tailroom(mbuf); + + rte_memcpy(rte_pktmbuf_append(mbuf, len), data, len); + data_len -= len; + data += len; + + while (data_len > 0) { + /* Allocate next mbuf and point to that. */ + m->next = rte_pktmbuf_alloc(mb_pool); + + if (unlikely(!m->next)) + return -1; + + m = m->next; + + /* Headroom is not needed in chained mbufs. */ + rte_pktmbuf_prepend(m, rte_pktmbuf_headroom(m)); + m->pkt_len = 0; + m->data_len = 0; + + /* Copy next segment. */ + len = RTE_MIN(rte_pktmbuf_tailroom(m), data_len); + rte_memcpy(rte_pktmbuf_append(m, len), data, len); + + mbuf->nb_segs++; + data_len -= len; + data += len; + } + + return mbuf->nb_segs; +} + +/* Copy data from mbuf chain to a buffer suitable for writing to a PCAP file. */ +static void +eth_pcap_gather_data(unsigned char *data, struct rte_mbuf *mbuf) +{ + uint16_t data_len = 0; + + while (mbuf) { + rte_memcpy(data + data_len, rte_pktmbuf_mtod(mbuf, void *), + mbuf->data_len); + + data_len += mbuf->data_len; + mbuf = mbuf->next; + } +} + +static uint16_t +eth_pcap_rx(void *queue, + struct rte_mbuf **bufs, + uint16_t nb_pkts) +{ + unsigned i; + struct pcap_pkthdr header; + const u_char *packet; + struct rte_mbuf *mbuf; + struct pcap_rx_queue *pcap_q = queue; + uint16_t num_rx = 0; + uint16_t buf_size; + uint32_t rx_bytes = 0; + + if (unlikely(pcap_q->pcap == NULL || nb_pkts == 0)) + return 0; + + /* Reads the given number of packets from the pcap file one by one + * and copies the packet data into a newly allocated mbuf to return. + */ + for (i = 0; i < nb_pkts; i++) { + /* Get the next PCAP packet */ + packet = pcap_next(pcap_q->pcap, &header); + if (unlikely(packet == NULL)) + break; + else + mbuf = rte_pktmbuf_alloc(pcap_q->mb_pool); + if (unlikely(mbuf == NULL)) + break; + + /* Now get the space available for data in the mbuf */ + buf_size = (uint16_t)(rte_pktmbuf_data_room_size(pcap_q->mb_pool) - + RTE_PKTMBUF_HEADROOM); + + if (header.caplen <= buf_size) { + /* pcap packet will fit in the mbuf, go ahead and copy */ + rte_memcpy(rte_pktmbuf_mtod(mbuf, void *), packet, + header.caplen); + mbuf->data_len = (uint16_t)header.caplen; + } else { + /* Try read jumbo frame into multi mbufs. */ + if (unlikely(eth_pcap_rx_jumbo(pcap_q->mb_pool, + mbuf, + packet, + header.caplen) == -1)) + break; + } + + mbuf->pkt_len = (uint16_t)header.caplen; + mbuf->port = pcap_q->in_port; + bufs[num_rx] = mbuf; + num_rx++; + rx_bytes += header.caplen; + } + pcap_q->rx_pkts += num_rx; + pcap_q->rx_bytes += rx_bytes; + return num_rx; +} + +static inline void +calculate_timestamp(struct timeval *ts) { + uint64_t cycles; + struct timeval cur_time; + + cycles = rte_get_timer_cycles() - start_cycles; + cur_time.tv_sec = cycles / hz; + cur_time.tv_usec = (cycles % hz) * 10e6 / hz; + timeradd(&start_time, &cur_time, ts); +} + +/* + * Callback to handle writing packets to a pcap file. + */ +static uint16_t +eth_pcap_tx_dumper(void *queue, + struct rte_mbuf **bufs, + uint16_t nb_pkts) +{ + unsigned i; + struct rte_mbuf *mbuf; + struct pcap_tx_queue *dumper_q = queue; + uint16_t num_tx = 0; + uint32_t tx_bytes = 0; + struct pcap_pkthdr header; + + if (dumper_q->dumper == NULL || nb_pkts == 0) + return 0; + + /* writes the nb_pkts packets to the previously opened pcap file dumper */ + for (i = 0; i < nb_pkts; i++) { + mbuf = bufs[i]; + calculate_timestamp(&header.ts); + header.len = mbuf->pkt_len; + header.caplen = header.len; + + if (likely(mbuf->nb_segs == 1)) { + pcap_dump((u_char *)dumper_q->dumper, &header, + rte_pktmbuf_mtod(mbuf, void*)); + } else { + if (mbuf->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN) { + eth_pcap_gather_data(tx_pcap_data, mbuf); + pcap_dump((u_char *)dumper_q->dumper, &header, + tx_pcap_data); + } else { + RTE_LOG(ERR, PMD, + "Dropping PCAP packet. " + "Size (%d) > max jumbo size (%d).\n", + mbuf->pkt_len, + ETHER_MAX_JUMBO_FRAME_LEN); + + rte_pktmbuf_free(mbuf); + break; + } + } + + rte_pktmbuf_free(mbuf); + num_tx++; + tx_bytes += mbuf->pkt_len; + } + + /* + * Since there's no place to hook a callback when the forwarding + * process stops and to make sure the pcap file is actually written, + * we flush the pcap dumper within each burst. + */ + pcap_dump_flush(dumper_q->dumper); + dumper_q->tx_pkts += num_tx; + dumper_q->tx_bytes += tx_bytes; + dumper_q->err_pkts += nb_pkts - num_tx; + return num_tx; +} + +/* + * Callback to handle sending packets through a real NIC. + */ +static uint16_t +eth_pcap_tx(void *queue, + struct rte_mbuf **bufs, + uint16_t nb_pkts) +{ + unsigned i; + int ret; + struct rte_mbuf *mbuf; + struct pcap_tx_queue *tx_queue = queue; + uint16_t num_tx = 0; + uint32_t tx_bytes = 0; + + if (unlikely(nb_pkts == 0 || tx_queue->pcap == NULL)) + return 0; + + for (i = 0; i < nb_pkts; i++) { + mbuf = bufs[i]; + + if (likely(mbuf->nb_segs == 1)) { + ret = pcap_sendpacket(tx_queue->pcap, + rte_pktmbuf_mtod(mbuf, u_char *), + mbuf->pkt_len); + } else { + if (mbuf->pkt_len <= ETHER_MAX_JUMBO_FRAME_LEN) { + eth_pcap_gather_data(tx_pcap_data, mbuf); + ret = pcap_sendpacket(tx_queue->pcap, + tx_pcap_data, + mbuf->pkt_len); + } else { + RTE_LOG(ERR, PMD, + "Dropping PCAP packet. " + "Size (%d) > max jumbo size (%d).\n", + mbuf->pkt_len, + ETHER_MAX_JUMBO_FRAME_LEN); + + rte_pktmbuf_free(mbuf); + break; + } + } + + if (unlikely(ret != 0)) + break; + num_tx++; + tx_bytes += mbuf->pkt_len; + rte_pktmbuf_free(mbuf); + } + + tx_queue->tx_pkts += num_tx; + tx_queue->tx_bytes += tx_bytes; + tx_queue->err_pkts += nb_pkts - num_tx; + return num_tx; +} + +static int +eth_dev_start(struct rte_eth_dev *dev) +{ + unsigned i; + struct pmd_internals *internals = dev->data->dev_private; + struct pcap_tx_queue *tx; + struct pcap_rx_queue *rx; + + /* Special iface case. Single pcap is open and shared between tx/rx. */ + if (internals->single_iface) { + tx = &internals->tx_queue[0]; + rx = &internals->rx_queue[0]; + + if (!tx->pcap && strcmp(tx->type, ETH_PCAP_IFACE_ARG) == 0) { + if (open_single_iface(tx->name, &tx->pcap) < 0) + return -1; + rx->pcap = tx->pcap; + } + goto status_up; + } + + /* If not open already, open tx pcaps/dumpers */ + for (i = 0; i < dev->data->nb_tx_queues; i++) { + tx = &internals->tx_queue[i]; + + if (!tx->dumper && strcmp(tx->type, ETH_PCAP_TX_PCAP_ARG) == 0) { + if (open_single_tx_pcap(tx->name, &tx->dumper) < 0) + return -1; + } + + else if (!tx->pcap && strcmp(tx->type, ETH_PCAP_TX_IFACE_ARG) == 0) { + if (open_single_iface(tx->name, &tx->pcap) < 0) + return -1; + } + } + + /* If not open already, open rx pcaps */ + for (i = 0; i < dev->data->nb_rx_queues; i++) { + rx = &internals->rx_queue[i]; + + if (rx->pcap != NULL) + continue; + + if (strcmp(rx->type, ETH_PCAP_RX_PCAP_ARG) == 0) { + if (open_single_rx_pcap(rx->name, &rx->pcap) < 0) + return -1; + } + + else if (strcmp(rx->type, ETH_PCAP_RX_IFACE_ARG) == 0) { + if (open_single_iface(rx->name, &rx->pcap) < 0) + return -1; + } + } + +status_up: + + dev->data->dev_link.link_status = ETH_LINK_UP; + return 0; +} + +/* + * This function gets called when the current port gets stopped. + * Is the only place for us to close all the tx streams dumpers. + * If not called the dumpers will be flushed within each tx burst. + */ +static void +eth_dev_stop(struct rte_eth_dev *dev) +{ + unsigned i; + struct pmd_internals *internals = dev->data->dev_private; + struct pcap_tx_queue *tx; + struct pcap_rx_queue *rx; + + /* Special iface case. Single pcap is open and shared between tx/rx. */ + if (internals->single_iface) { + tx = &internals->tx_queue[0]; + rx = &internals->rx_queue[0]; + pcap_close(tx->pcap); + tx->pcap = NULL; + rx->pcap = NULL; + goto status_down; + } + + for (i = 0; i < dev->data->nb_tx_queues; i++) { + tx = &internals->tx_queue[i]; + + if (tx->dumper != NULL) { + pcap_dump_close(tx->dumper); + tx->dumper = NULL; + } + + if (tx->pcap != NULL) { + pcap_close(tx->pcap); + tx->pcap = NULL; + } + } + + for (i = 0; i < dev->data->nb_rx_queues; i++) { + rx = &internals->rx_queue[i]; + + if (rx->pcap != NULL) { + pcap_close(rx->pcap); + rx->pcap = NULL; + } + } + +status_down: + dev->data->dev_link.link_status = ETH_LINK_DOWN; +} + +static int +eth_dev_configure(struct rte_eth_dev *dev __rte_unused) +{ + return 0; +} + +static void +eth_dev_info(struct rte_eth_dev *dev, + struct rte_eth_dev_info *dev_info) +{ + struct pmd_internals *internals = dev->data->dev_private; + dev_info->driver_name = drivername; + dev_info->if_index = internals->if_index; + dev_info->max_mac_addrs = 1; + dev_info->max_rx_pktlen = (uint32_t) -1; + dev_info->max_rx_queues = dev->data->nb_rx_queues; + dev_info->max_tx_queues = dev->data->nb_tx_queues; + dev_info->min_rx_bufsize = 0; + dev_info->pci_dev = NULL; +} + +static void +eth_stats_get(struct rte_eth_dev *dev, + struct rte_eth_stats *igb_stats) +{ + unsigned i; + unsigned long rx_packets_total = 0, rx_bytes_total = 0; + unsigned long tx_packets_total = 0, tx_bytes_total = 0; + unsigned long tx_packets_err_total = 0; + const struct pmd_internals *internal = dev->data->dev_private; + + for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && + i < dev->data->nb_rx_queues; i++) { + igb_stats->q_ipackets[i] = internal->rx_queue[i].rx_pkts; + igb_stats->q_ibytes[i] = internal->rx_queue[i].rx_bytes; + rx_packets_total += igb_stats->q_ipackets[i]; + rx_bytes_total += igb_stats->q_ibytes[i]; + } + + for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS && + i < dev->data->nb_tx_queues; i++) { + igb_stats->q_opackets[i] = internal->tx_queue[i].tx_pkts; + igb_stats->q_obytes[i] = internal->tx_queue[i].tx_bytes; + igb_stats->q_errors[i] = internal->tx_queue[i].err_pkts; + tx_packets_total += igb_stats->q_opackets[i]; + tx_bytes_total += igb_stats->q_obytes[i]; + tx_packets_err_total += igb_stats->q_errors[i]; + } + + igb_stats->ipackets = rx_packets_total; + igb_stats->ibytes = rx_bytes_total; + igb_stats->opackets = tx_packets_total; + igb_stats->obytes = tx_bytes_total; + igb_stats->oerrors = tx_packets_err_total; +} + +static void +eth_stats_reset(struct rte_eth_dev *dev) +{ + unsigned i; + struct pmd_internals *internal = dev->data->dev_private; + for (i = 0; i < dev->data->nb_rx_queues; i++) { + internal->rx_queue[i].rx_pkts = 0; + internal->rx_queue[i].rx_bytes = 0; + } + for (i = 0; i < dev->data->nb_tx_queues; i++) { + internal->tx_queue[i].tx_pkts = 0; + internal->tx_queue[i].tx_bytes = 0; + internal->tx_queue[i].err_pkts = 0; + } +} + +static void +eth_dev_close(struct rte_eth_dev *dev __rte_unused) +{ +} + +static void +eth_queue_release(void *q __rte_unused) +{ +} + +static int +eth_link_update(struct rte_eth_dev *dev __rte_unused, + int wait_to_complete __rte_unused) +{ + return 0; +} + +static int +eth_rx_queue_setup(struct rte_eth_dev *dev, + uint16_t rx_queue_id, + uint16_t nb_rx_desc __rte_unused, + unsigned int socket_id __rte_unused, + const struct rte_eth_rxconf *rx_conf __rte_unused, + struct rte_mempool *mb_pool) +{ + struct pmd_internals *internals = dev->data->dev_private; + struct pcap_rx_queue *pcap_q = &internals->rx_queue[rx_queue_id]; + pcap_q->mb_pool = mb_pool; + dev->data->rx_queues[rx_queue_id] = pcap_q; + pcap_q->in_port = dev->data->port_id; + return 0; +} + +static int +eth_tx_queue_setup(struct rte_eth_dev *dev, + uint16_t tx_queue_id, + uint16_t nb_tx_desc __rte_unused, + unsigned int socket_id __rte_unused, + const struct rte_eth_txconf *tx_conf __rte_unused) +{ + + struct pmd_internals *internals = dev->data->dev_private; + dev->data->tx_queues[tx_queue_id] = &internals->tx_queue[tx_queue_id]; + return 0; +} + +static const struct eth_dev_ops ops = { + .dev_start = eth_dev_start, + .dev_stop = eth_dev_stop, + .dev_close = eth_dev_close, + .dev_configure = eth_dev_configure, + .dev_infos_get = eth_dev_info, + .rx_queue_setup = eth_rx_queue_setup, + .tx_queue_setup = eth_tx_queue_setup, + .rx_queue_release = eth_queue_release, + .tx_queue_release = eth_queue_release, + .link_update = eth_link_update, + .stats_get = eth_stats_get, + .stats_reset = eth_stats_reset, +}; + +/* + * Function handler that opens the pcap file for reading a stores a + * reference of it for use it later on. + */ +static int +open_rx_pcap(const char *key, const char *value, void *extra_args) +{ + unsigned i; + const char *pcap_filename = value; + struct rx_pcaps *pcaps = extra_args; + pcap_t *pcap = NULL; + + for (i = 0; i < pcaps->num_of_rx; i++) { + if (open_single_rx_pcap(pcap_filename, &pcap) < 0) + return -1; + + pcaps->pcaps[i] = pcap; + pcaps->names[i] = pcap_filename; + pcaps->types[i] = key; + } + + return 0; +} + +static int +open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap) +{ + if ((*pcap = pcap_open_offline(pcap_filename, errbuf)) == NULL) { + RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename, errbuf); + return -1; + } + return 0; +} + +/* + * Opens a pcap file for writing and stores a reference to it + * for use it later on. + */ +static int +open_tx_pcap(const char *key, const char *value, void *extra_args) +{ + unsigned i; + const char *pcap_filename = value; + struct tx_pcaps *dumpers = extra_args; + pcap_dumper_t *dumper; + + for (i = 0; i < dumpers->num_of_tx; i++) { + if (open_single_tx_pcap(pcap_filename, &dumper) < 0) + return -1; + + dumpers->dumpers[i] = dumper; + dumpers->names[i] = pcap_filename; + dumpers->types[i] = key; + } + + return 0; +} + +static int +open_single_tx_pcap(const char *pcap_filename, pcap_dumper_t **dumper) +{ + pcap_t *tx_pcap; + /* + * We need to create a dummy empty pcap_t to use it + * with pcap_dump_open(). We create big enough an Ethernet + * pcap holder. + */ + + if ((tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN)) + == NULL) { + RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n"); + return -1; + } + + /* The dumper is created using the previous pcap_t reference */ + if ((*dumper = pcap_dump_open(tx_pcap, pcap_filename)) == NULL) { + RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n", pcap_filename); + return -1; + } + + return 0; +} + +/* + * pcap_open_live wrapper function + */ +static inline int +open_iface_live(const char *iface, pcap_t **pcap) { + *pcap = pcap_open_live(iface, RTE_ETH_PCAP_SNAPLEN, + RTE_ETH_PCAP_PROMISC, RTE_ETH_PCAP_TIMEOUT, errbuf); + + if (*pcap == NULL) { + RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", iface, errbuf); + return -1; + } + return 0; +} + +/* + * Opens an interface for reading and writing + */ +static inline int +open_rx_tx_iface(const char *key, const char *value, void *extra_args) +{ + const char *iface = value; + struct rx_pcaps *pcaps = extra_args; + pcap_t *pcap = NULL; + + if (open_single_iface(iface, &pcap) < 0) + return -1; + + pcaps->pcaps[0] = pcap; + pcaps->names[0] = iface; + pcaps->types[0] = key; + + return 0; +} + +/* + * Opens a NIC for reading packets from it + */ +static inline int +open_rx_iface(const char *key, const char *value, void *extra_args) +{ + unsigned i; + const char *iface = value; + struct rx_pcaps *pcaps = extra_args; + pcap_t *pcap = NULL; + + for (i = 0; i < pcaps->num_of_rx; i++) { + if (open_single_iface(iface, &pcap) < 0) + return -1; + pcaps->pcaps[i] = pcap; + pcaps->names[i] = iface; + pcaps->types[i] = key; + } + + return 0; +} + +/* + * Opens a NIC for writing packets to it + */ +static int +open_tx_iface(const char *key, const char *value, void *extra_args) +{ + unsigned i; + const char *iface = value; + struct tx_pcaps *pcaps = extra_args; + pcap_t *pcap; + + for (i = 0; i < pcaps->num_of_tx; i++) { + if (open_single_iface(iface, &pcap) < 0) + return -1; + pcaps->pcaps[i] = pcap; + pcaps->names[i] = iface; + pcaps->types[i] = key; + } + + return 0; +} + +static int +open_single_iface(const char *iface, pcap_t **pcap) +{ + if (open_iface_live(iface, pcap) < 0) { + RTE_LOG(ERR, PMD, "Couldn't open interface %s\n", iface); + return -1; + } + + return 0; +} + +static int +rte_pmd_init_internals(const char *name, const unsigned nb_rx_queues, + const unsigned nb_tx_queues, + const unsigned numa_node, + struct pmd_internals **internals, + struct rte_eth_dev **eth_dev, + struct rte_kvargs *kvlist) +{ + struct rte_eth_dev_data *data = NULL; + unsigned k_idx; + struct rte_kvargs_pair *pair = NULL; + + for (k_idx = 0; k_idx < kvlist->count; k_idx++) { + pair = &kvlist->pairs[k_idx]; + if (strstr(pair->key, ETH_PCAP_IFACE_ARG) != NULL) + break; + } + + RTE_LOG(INFO, PMD, + "Creating pcap-backed ethdev on numa socket %u\n", numa_node); + + /* now do all data allocation - for eth_dev structure + * and internal (private) data + */ + data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node); + if (data == NULL) + goto error; + + *internals = rte_zmalloc_socket(name, sizeof(**internals), 0, numa_node); + if (*internals == NULL) + goto error; + + /* reserve an ethdev entry */ + *eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL); + if (*eth_dev == NULL) + 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 + * - point eth_dev_data to internals + * - and point eth_dev structure to new eth_dev_data structure + */ + /* NOTE: we'll replace the data element, of originally allocated eth_dev + * so the rings are local per-process */ + + if (pair == NULL) + (*internals)->if_index = 0; + else + (*internals)->if_index = if_nametoindex(pair->value); + + data->dev_private = *internals; + data->port_id = (*eth_dev)->data->port_id; + snprintf(data->name, sizeof(data->name), "%s", (*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 = ð_addr; + strncpy(data->name, + (*eth_dev)->data->name, strlen((*eth_dev)->data->name)); + + (*eth_dev)->data = data; + (*eth_dev)->dev_ops = &ops; + (*eth_dev)->driver = NULL; + data->dev_flags = RTE_ETH_DEV_DETACHABLE; + data->kdrv = RTE_KDRV_NONE; + data->drv_name = drivername; + data->numa_node = numa_node; + + return 0; + +error: + rte_free(data); + rte_free(*internals); + + return -1; +} + +static int +rte_eth_from_pcaps_common(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_kvargs *kvlist, struct pmd_internals **internals, + struct rte_eth_dev **eth_dev) +{ + unsigned i; + + /* do some parameter checking */ + if (rx_queues == NULL && nb_rx_queues > 0) + return -1; + if (tx_queues == NULL && nb_tx_queues > 0) + return -1; + + if (rte_pmd_init_internals(name, nb_rx_queues, nb_tx_queues, numa_node, + internals, eth_dev, kvlist) < 0) + return -1; + + 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]); + } + + return 0; +} + +static int +rte_eth_from_pcaps_n_dumpers(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_kvargs *kvlist) +{ + struct pmd_internals *internals = NULL; + struct rte_eth_dev *eth_dev = NULL; + int ret; + + ret = rte_eth_from_pcaps_common(name, rx_queues, nb_rx_queues, + tx_queues, nb_tx_queues, numa_node, kvlist, + &internals, ð_dev); + + if (ret < 0) + return ret; + + /* using multiple pcaps/interfaces */ + internals->single_iface = 0; + + eth_dev->rx_pkt_burst = eth_pcap_rx; + eth_dev->tx_pkt_burst = eth_pcap_tx_dumper; + + return 0; +} + +static int +rte_eth_from_pcaps(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_kvargs *kvlist, + int single_iface) +{ + struct pmd_internals *internals = NULL; + struct rte_eth_dev *eth_dev = NULL; + int ret; + + ret = rte_eth_from_pcaps_common(name, rx_queues, nb_rx_queues, + tx_queues, nb_tx_queues, numa_node, kvlist, + &internals, ð_dev); + + if (ret < 0) + return ret; + + /* store wether we are using a single interface for rx/tx or not */ + internals->single_iface = single_iface; + + eth_dev->rx_pkt_burst = eth_pcap_rx; + eth_dev->tx_pkt_burst = eth_pcap_tx; + + return 0; +} + + +static int +rte_pmd_pcap_devinit(const char *name, const char *params) +{ + unsigned numa_node, using_dumpers = 0; + int ret; + struct rte_kvargs *kvlist; + struct rx_pcaps pcaps; + struct tx_pcaps dumpers; + + RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name); + + numa_node = rte_socket_id(); + + gettimeofday(&start_time, NULL); + start_cycles = rte_get_timer_cycles(); + hz = rte_get_timer_hz(); + + kvlist = rte_kvargs_parse(params, valid_arguments); + if (kvlist == NULL) + return -1; + + /* + * If iface argument is passed we open the NICs and use them for + * reading / writing + */ + if (rte_kvargs_count(kvlist, ETH_PCAP_IFACE_ARG) == 1) { + + ret = rte_kvargs_process(kvlist, ETH_PCAP_IFACE_ARG, + &open_rx_tx_iface, &pcaps); + if (ret < 0) + goto free_kvlist; + dumpers.pcaps[0] = pcaps.pcaps[0]; + dumpers.names[0] = pcaps.names[0]; + dumpers.types[0] = pcaps.types[0]; + ret = rte_eth_from_pcaps(name, &pcaps, 1, &dumpers, 1, + numa_node, kvlist, 1); + goto free_kvlist; + } + + /* + * We check whether we want to open a RX stream from a real NIC or a + * pcap file + */ + if ((pcaps.num_of_rx = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG))) { + ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG, + &open_rx_pcap, &pcaps); + } else { + pcaps.num_of_rx = rte_kvargs_count(kvlist, + ETH_PCAP_RX_IFACE_ARG); + ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_IFACE_ARG, + &open_rx_iface, &pcaps); + } + + if (ret < 0) + goto free_kvlist; + + /* + * We check whether we want to open a TX stream to a real NIC or a + * pcap file + */ + if ((dumpers.num_of_tx = rte_kvargs_count(kvlist, + ETH_PCAP_TX_PCAP_ARG))) { + ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG, + &open_tx_pcap, &dumpers); + using_dumpers = 1; + } else { + dumpers.num_of_tx = rte_kvargs_count(kvlist, + ETH_PCAP_TX_IFACE_ARG); + ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG, + &open_tx_iface, &dumpers); + } + + if (ret < 0) + goto free_kvlist; + + if (using_dumpers) + ret = rte_eth_from_pcaps_n_dumpers(name, &pcaps, pcaps.num_of_rx, + &dumpers, dumpers.num_of_tx, numa_node, kvlist); + else + ret = rte_eth_from_pcaps(name, &pcaps, pcaps.num_of_rx, &dumpers, + dumpers.num_of_tx, numa_node, kvlist, 0); + +free_kvlist: + rte_kvargs_free(kvlist); + return ret; +} + +static int +rte_pmd_pcap_devuninit(const char *name) +{ + struct rte_eth_dev *eth_dev = NULL; + + RTE_LOG(INFO, PMD, "Closing pcap ethdev on numa socket %u\n", + rte_socket_id()); + + if (name == NULL) + return -1; + + /* reserve an ethdev entry */ + eth_dev = rte_eth_dev_allocated(name); + if (eth_dev == NULL) + return -1; + + rte_free(eth_dev->data->dev_private); + rte_free(eth_dev->data); + + rte_eth_dev_release_port(eth_dev); + + return 0; +} + +static struct rte_driver pmd_pcap_drv = { + .name = "eth_pcap", + .type = PMD_VDEV, + .init = rte_pmd_pcap_devinit, + .uninit = rte_pmd_pcap_devuninit, +}; + +PMD_REGISTER_DRIVER(pmd_pcap_drv); diff --git a/drivers/net/pcap/rte_pmd_pcap_version.map b/drivers/net/pcap/rte_pmd_pcap_version.map new file mode 100644 index 00000000..ef353984 --- /dev/null +++ b/drivers/net/pcap/rte_pmd_pcap_version.map @@ -0,0 +1,4 @@ +DPDK_2.0 { + + local: *; +}; |