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numam-dpdk/drivers/net/pcap/rte_eth_pcap.c
Matan Azrad d5b0924ba6 ethdev: add return value to stats get dev op 
The stats_get dev op API doesn't include return value, so PMD cannot
return an error in case of failure at stats getting process time.

Since PCI devices can be removed and there is a time between the
physical removal to the RMV interrupt, the user may get invalid stats
without any indication.

This patch changes the stats_get API return value to be int instead of
void.

All the net PMDs stats_get dev ops are adjusted by this patch.

Signed-off-by: Matan Azrad <matan@mellanox.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>
2017-10-12 01:52:49 +01:00

1070 lines
26 KiB
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/*-
* BSD LICENSE
*
* Copyright(c) 2010-2016 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 <net/if.h>
#include <pcap.h>
#include <rte_cycles.h>
#include <rte_ethdev.h>
#include <rte_ethdev_vdev.h>
#include <rte_kvargs.h>
#include <rte_malloc.h>
#include <rte_mbuf.h>
#include <rte_vdev.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
#define RTE_PMD_PCAP_MAX_QUEUES 16
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 queue_stat {
volatile unsigned long pkts;
volatile unsigned long bytes;
volatile unsigned long err_pkts;
};
struct pcap_rx_queue {
pcap_t *pcap;
uint16_t in_port;
struct rte_mempool *mb_pool;
struct queue_stat rx_stat;
char name[PATH_MAX];
char type[ETH_PCAP_ARG_MAXLEN];
};
struct pcap_tx_queue {
pcap_dumper_t *dumper;
pcap_t *pcap;
struct queue_stat tx_stat;
char name[PATH_MAX];
char type[ETH_PCAP_ARG_MAXLEN];
};
struct pmd_internals {
struct pcap_rx_queue rx_queue[RTE_PMD_PCAP_MAX_QUEUES];
struct pcap_tx_queue tx_queue[RTE_PMD_PCAP_MAX_QUEUES];
int if_index;
int single_iface;
};
struct pmd_devargs {
unsigned int num_of_queue;
struct devargs_queue {
pcap_dumper_t *dumper;
pcap_t *pcap;
const char *name;
const char *type;
} queue[RTE_PMD_PCAP_MAX_QUEUES];
};
static 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 struct ether_addr eth_addr = {
.addr_bytes = { 0, 0, 0, 0x1, 0x2, 0x3 }
};
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)
{
/* Copy the first segment. */
uint16_t len = rte_pktmbuf_tailroom(mbuf);
struct rte_mbuf *m = 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 int 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;
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 = rte_pktmbuf_data_room_size(pcap_q->mb_pool) -
RTE_PKTMBUF_HEADROOM;
if (header.caplen <= buf_size) {
/* pcap packet will fit in the mbuf, can copy it */
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)) {
rte_pktmbuf_free(mbuf);
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_stat.pkts += num_rx;
pcap_q->rx_stat.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) * 1e6 / 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 int 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;
}
}
num_tx++;
tx_bytes += mbuf->pkt_len;
rte_pktmbuf_free(mbuf);
}
/*
* 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_stat.pkts += num_tx;
dumper_q->tx_stat.bytes += tx_bytes;
dumper_q->tx_stat.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 int 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_stat.pkts += num_tx;
tx_queue->tx_stat.bytes += tx_bytes;
tx_queue->tx_stat.err_pkts += nb_pkts - num_tx;
return num_tx;
}
/*
* 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;
}
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
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.
*/
tx_pcap = pcap_open_dead(DLT_EN10MB, RTE_ETH_PCAP_SNAPSHOT_LEN);
if (tx_pcap == NULL) {
RTE_LOG(ERR, PMD, "Couldn't create dead pcap\n");
return -1;
}
/* The dumper is created using the previous pcap_t reference */
*dumper = pcap_dump_open(tx_pcap, pcap_filename);
if (*dumper == NULL) {
RTE_LOG(ERR, PMD, "Couldn't open %s for writing.\n",
pcap_filename);
return -1;
}
return 0;
}
static int
open_single_rx_pcap(const char *pcap_filename, pcap_t **pcap)
{
*pcap = pcap_open_offline(pcap_filename, errbuf);
if (*pcap == NULL) {
RTE_LOG(ERR, PMD, "Couldn't open %s: %s\n", pcap_filename,
errbuf);
return -1;
}
return 0;
}
static int
eth_dev_start(struct rte_eth_dev *dev)
{
unsigned int 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 int 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->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;
}
static int
eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
{
unsigned int 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++) {
stats->q_ipackets[i] = internal->rx_queue[i].rx_stat.pkts;
stats->q_ibytes[i] = internal->rx_queue[i].rx_stat.bytes;
rx_packets_total += stats->q_ipackets[i];
rx_bytes_total += stats->q_ibytes[i];
}
for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
i < dev->data->nb_tx_queues; i++) {
stats->q_opackets[i] = internal->tx_queue[i].tx_stat.pkts;
stats->q_obytes[i] = internal->tx_queue[i].tx_stat.bytes;
stats->q_errors[i] = internal->tx_queue[i].tx_stat.err_pkts;
tx_packets_total += stats->q_opackets[i];
tx_bytes_total += stats->q_obytes[i];
tx_packets_err_total += stats->q_errors[i];
}
stats->ipackets = rx_packets_total;
stats->ibytes = rx_bytes_total;
stats->opackets = tx_packets_total;
stats->obytes = tx_bytes_total;
stats->oerrors = tx_packets_err_total;
return 0;
}
static void
eth_stats_reset(struct rte_eth_dev *dev)
{
unsigned int i;
struct pmd_internals *internal = dev->data->dev_private;
for (i = 0; i < dev->data->nb_rx_queues; i++) {
internal->rx_queue[i].rx_stat.pkts = 0;
internal->rx_queue[i].rx_stat.bytes = 0;
}
for (i = 0; i < dev->data->nb_tx_queues; i++) {
internal->tx_queue[i].tx_stat.pkts = 0;
internal->tx_queue[i].tx_stat.bytes = 0;
internal->tx_queue[i].tx_stat.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 int i;
const char *pcap_filename = value;
struct pmd_devargs *rx = extra_args;
pcap_t *pcap = NULL;
for (i = 0; i < rx->num_of_queue; i++) {
if (open_single_rx_pcap(pcap_filename, &pcap) < 0)
return -1;
rx->queue[i].pcap = pcap;
rx->queue[i].name = pcap_filename;
rx->queue[i].type = key;
}
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 int i;
const char *pcap_filename = value;
struct pmd_devargs *dumpers = extra_args;
pcap_dumper_t *dumper;
for (i = 0; i < dumpers->num_of_queue; i++) {
if (open_single_tx_pcap(pcap_filename, &dumper) < 0)
return -1;
dumpers->queue[i].dumper = dumper;
dumpers->queue[i].name = pcap_filename;
dumpers->queue[i].type = key;
}
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 pmd_devargs *tx = extra_args;
pcap_t *pcap = NULL;
if (open_single_iface(iface, &pcap) < 0)
return -1;
tx->queue[0].pcap = pcap;
tx->queue[0].name = iface;
tx->queue[0].type = 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 int i;
const char *iface = value;
struct pmd_devargs *rx = extra_args;
pcap_t *pcap = NULL;
for (i = 0; i < rx->num_of_queue; i++) {
if (open_single_iface(iface, &pcap) < 0)
return -1;
rx->queue[i].pcap = pcap;
rx->queue[i].name = iface;
rx->queue[i].type = 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 int i;
const char *iface = value;
struct pmd_devargs *tx = extra_args;
pcap_t *pcap;
for (i = 0; i < tx->num_of_queue; i++) {
if (open_single_iface(iface, &pcap) < 0)
return -1;
tx->queue[i].pcap = pcap;
tx->queue[i].name = iface;
tx->queue[i].type = key;
}
return 0;
}
static struct rte_vdev_driver pmd_pcap_drv;
static int
pmd_init_internals(struct rte_vdev_device *vdev,
const unsigned int nb_rx_queues,
const unsigned int nb_tx_queues,
struct pmd_internals **internals,
struct rte_eth_dev **eth_dev)
{
struct rte_eth_dev_data *data = NULL;
unsigned int numa_node = vdev->device.numa_node;
const char *name;
name = rte_vdev_device_name(vdev);
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)
return -1;
/* reserve an ethdev entry */
*eth_dev = rte_eth_vdev_allocate(vdev, sizeof(**internals));
if (*eth_dev == NULL) {
rte_free(data);
return -1;
}
/* 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
*/
*internals = (*eth_dev)->data->dev_private;
rte_memcpy(data, (*eth_dev)->data, sizeof(*data));
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;
/*
* NOTE: we'll replace the data element, of originally allocated
* eth_dev so the rings are local per-process
*/
(*eth_dev)->data = data;
(*eth_dev)->dev_ops = &ops;
data->dev_flags = RTE_ETH_DEV_DETACHABLE;
return 0;
}
static int
eth_from_pcaps_common(struct rte_vdev_device *vdev,
struct pmd_devargs *rx_queues, const unsigned int nb_rx_queues,
struct pmd_devargs *tx_queues, const unsigned int nb_tx_queues,
struct rte_kvargs *kvlist, struct pmd_internals **internals,
struct rte_eth_dev **eth_dev)
{
struct rte_kvargs_pair *pair = NULL;
unsigned int k_idx;
unsigned int 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 (pmd_init_internals(vdev, nb_rx_queues, nb_tx_queues, internals,
eth_dev) < 0)
return -1;
for (i = 0; i < nb_rx_queues; i++) {
struct pcap_rx_queue *rx = &(*internals)->rx_queue[i];
struct devargs_queue *queue = &rx_queues->queue[i];
rx->pcap = queue->pcap;
snprintf(rx->name, sizeof(rx->name), "%s", queue->name);
snprintf(rx->type, sizeof(rx->type), "%s", queue->type);
}
for (i = 0; i < nb_tx_queues; i++) {
struct pcap_tx_queue *tx = &(*internals)->tx_queue[i];
struct devargs_queue *queue = &tx_queues->queue[i];
tx->dumper = queue->dumper;
tx->pcap = queue->pcap;
snprintf(tx->name, sizeof(tx->name), "%s", queue->name);
snprintf(tx->type, sizeof(tx->type), "%s", queue->type);
}
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;
}
if (pair == NULL)
(*internals)->if_index = 0;
else
(*internals)->if_index = if_nametoindex(pair->value);
return 0;
}
static int
eth_from_pcaps(struct rte_vdev_device *vdev,
struct pmd_devargs *rx_queues, const unsigned int nb_rx_queues,
struct pmd_devargs *tx_queues, const unsigned int nb_tx_queues,
struct rte_kvargs *kvlist, int single_iface,
unsigned int using_dumpers)
{
struct pmd_internals *internals = NULL;
struct rte_eth_dev *eth_dev = NULL;
int ret;
ret = eth_from_pcaps_common(vdev, rx_queues, nb_rx_queues,
tx_queues, nb_tx_queues, kvlist, &internals, &eth_dev);
if (ret < 0)
return ret;
/* store weather we are using a single interface for rx/tx or not */
internals->single_iface = single_iface;
eth_dev->rx_pkt_burst = eth_pcap_rx;
if (using_dumpers)
eth_dev->tx_pkt_burst = eth_pcap_tx_dumper;
else
eth_dev->tx_pkt_burst = eth_pcap_tx;
return 0;
}
static int
pmd_pcap_probe(struct rte_vdev_device *dev)
{
const char *name;
unsigned int is_rx_pcap = 0, is_tx_pcap = 0;
struct rte_kvargs *kvlist;
struct pmd_devargs pcaps = {0};
struct pmd_devargs dumpers = {0};
int single_iface = 0;
int ret;
name = rte_vdev_device_name(dev);
RTE_LOG(INFO, PMD, "Initializing pmd_pcap for %s\n", name);
gettimeofday(&start_time, NULL);
start_cycles = rte_get_timer_cycles();
hz = rte_get_timer_hz();
kvlist = rte_kvargs_parse(rte_vdev_device_args(dev), 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.queue[0] = pcaps.queue[0];
single_iface = 1;
pcaps.num_of_queue = 1;
dumpers.num_of_queue = 1;
goto create_eth;
}
/*
* We check whether we want to open a RX stream from a real NIC or a
* pcap file
*/
pcaps.num_of_queue = rte_kvargs_count(kvlist, ETH_PCAP_RX_PCAP_ARG);
if (pcaps.num_of_queue)
is_rx_pcap = 1;
else
pcaps.num_of_queue = rte_kvargs_count(kvlist,
ETH_PCAP_RX_IFACE_ARG);
if (pcaps.num_of_queue > RTE_PMD_PCAP_MAX_QUEUES)
pcaps.num_of_queue = RTE_PMD_PCAP_MAX_QUEUES;
if (is_rx_pcap)
ret = rte_kvargs_process(kvlist, ETH_PCAP_RX_PCAP_ARG,
&open_rx_pcap, &pcaps);
else
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
*/
dumpers.num_of_queue = rte_kvargs_count(kvlist, ETH_PCAP_TX_PCAP_ARG);
if (dumpers.num_of_queue)
is_tx_pcap = 1;
else
dumpers.num_of_queue = rte_kvargs_count(kvlist,
ETH_PCAP_TX_IFACE_ARG);
if (dumpers.num_of_queue > RTE_PMD_PCAP_MAX_QUEUES)
dumpers.num_of_queue = RTE_PMD_PCAP_MAX_QUEUES;
if (is_tx_pcap)
ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_PCAP_ARG,
&open_tx_pcap, &dumpers);
else
ret = rte_kvargs_process(kvlist, ETH_PCAP_TX_IFACE_ARG,
&open_tx_iface, &dumpers);
if (ret < 0)
goto free_kvlist;
create_eth:
ret = eth_from_pcaps(dev, &pcaps, pcaps.num_of_queue, &dumpers,
dumpers.num_of_queue, kvlist, single_iface, is_tx_pcap);
free_kvlist:
rte_kvargs_free(kvlist);
return ret;
}
static int
pmd_pcap_remove(struct rte_vdev_device *dev)
{
struct rte_eth_dev *eth_dev = NULL;
RTE_LOG(INFO, PMD, "Closing pcap ethdev on numa socket %u\n",
rte_socket_id());
if (!dev)
return -1;
/* reserve an ethdev entry */
eth_dev = rte_eth_dev_allocated(rte_vdev_device_name(dev));
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_vdev_driver pmd_pcap_drv = {
.probe = pmd_pcap_probe,
.remove = pmd_pcap_remove,
};
RTE_PMD_REGISTER_VDEV(net_pcap, pmd_pcap_drv);
RTE_PMD_REGISTER_ALIAS(net_pcap, eth_pcap);
RTE_PMD_REGISTER_PARAM_STRING(net_pcap,
ETH_PCAP_RX_PCAP_ARG "=<string> "
ETH_PCAP_TX_PCAP_ARG "=<string> "
ETH_PCAP_RX_IFACE_ARG "=<ifc> "
ETH_PCAP_TX_IFACE_ARG "=<ifc> "
ETH_PCAP_IFACE_ARG "=<ifc>");
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