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linux-kernelorg-stable/tools/testing/selftests/drivers/net/hw/ncdevmem.c

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// SPDX-License-Identifier: GPL-2.0
/*
* tcpdevmem netcat. Works similarly to netcat but does device memory TCP
* instead of regular TCP. Uses udmabuf to mock a dmabuf provider.
*
* Usage:
*
* On server:
* ncdevmem -s <server IP> [-c <client IP>] -f eth1 -l -p 5201
*
* On client:
* echo -n "hello\nworld" | \
* ncdevmem -s <server IP> [-c <client IP>] -p 5201 -f eth1
*
* Note this is compatible with regular netcat. i.e. the sender or receiver can
* be replaced with regular netcat to test the RX or TX path in isolation.
*
* Test data validation (devmem TCP on RX only):
*
* On server:
* ncdevmem -s <server IP> [-c <client IP>] -f eth1 -l -p 5201 -v 7
*
* On client:
* yes $(echo -e \\x01\\x02\\x03\\x04\\x05\\x06) | \
* head -c 1G | \
* nc <server IP> 5201 -p 5201
*
* Test data validation (devmem TCP on RX and TX, validation happens on RX):
*
* On server:
* ncdevmem -s <server IP> [-c <client IP>] -l -p 5201 -v 8 -f eth1
*
* On client:
* yes $(echo -e \\x01\\x02\\x03\\x04\\x05\\x06\\x07) | \
* head -c 1M | \
* ncdevmem -s <server IP> [-c <client IP>] -p 5201 -f eth1
*/
#define _GNU_SOURCE
#define __EXPORTED_HEADERS__
#include <linux/uio.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#define __iovec_defined
#include <fcntl.h>
#include <malloc.h>
#include <error.h>
#include <poll.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <linux/memfd.h>
#include <linux/dma-buf.h>
#include <linux/errqueue.h>
#include <linux/udmabuf.h>
#include <linux/types.h>
#include <linux/netlink.h>
#include <linux/genetlink.h>
#include <linux/netdev.h>
#include <linux/ethtool_netlink.h>
#include <time.h>
#include <net/if.h>
#include "netdev-user.h"
#include "ethtool-user.h"
#include <ynl.h>
#define PAGE_SHIFT 12
#define TEST_PREFIX "ncdevmem"
#define NUM_PAGES 16000
#ifndef MSG_SOCK_DEVMEM
#define MSG_SOCK_DEVMEM 0x2000000
#endif
#define MAX_IOV 1024
static size_t max_chunk;
static char *server_ip;
static char *client_ip;
static char *port;
static size_t do_validation;
static int start_queue = -1;
static int num_queues = -1;
static char *ifname;
static unsigned int ifindex;
static unsigned int dmabuf_id;
static uint32_t tx_dmabuf_id;
static int waittime_ms = 500;
/* System state loaded by current_config_load() */
#define MAX_FLOWS 8
static int ntuple_ids[MAX_FLOWS] = { -1, -1, -1, -1, -1, -1, -1, -1, };
struct memory_buffer {
int fd;
size_t size;
int devfd;
int memfd;
char *buf_mem;
};
struct memory_provider {
struct memory_buffer *(*alloc)(size_t size);
void (*free)(struct memory_buffer *ctx);
void (*memcpy_to_device)(struct memory_buffer *dst, size_t off,
void *src, int n);
void (*memcpy_from_device)(void *dst, struct memory_buffer *src,
size_t off, int n);
};
static void pr_err(const char *fmt, ...)
{
va_list args;
fprintf(stderr, "%s: ", TEST_PREFIX);
va_start(args, fmt);
vfprintf(stderr, fmt, args);
va_end(args);
if (errno != 0)
fprintf(stderr, ": %s", strerror(errno));
fprintf(stderr, "\n");
}
static struct memory_buffer *udmabuf_alloc(size_t size)
{
struct udmabuf_create create;
struct memory_buffer *ctx;
int ret;
ctx = malloc(sizeof(*ctx));
if (!ctx)
return NULL;
ctx->size = size;
ctx->devfd = open("/dev/udmabuf", O_RDWR);
if (ctx->devfd < 0) {
pr_err("[skip,no-udmabuf: Unable to access DMA buffer device file]");
goto err_free_ctx;
}
ctx->memfd = memfd_create("udmabuf-test", MFD_ALLOW_SEALING);
if (ctx->memfd < 0) {
pr_err("[skip,no-memfd]");
goto err_close_dev;
}
ret = fcntl(ctx->memfd, F_ADD_SEALS, F_SEAL_SHRINK);
if (ret < 0) {
pr_err("[skip,fcntl-add-seals]");
goto err_close_memfd;
}
ret = ftruncate(ctx->memfd, size);
if (ret == -1) {
pr_err("[FAIL,memfd-truncate]");
goto err_close_memfd;
}
memset(&create, 0, sizeof(create));
create.memfd = ctx->memfd;
create.offset = 0;
create.size = size;
ctx->fd = ioctl(ctx->devfd, UDMABUF_CREATE, &create);
if (ctx->fd < 0) {
pr_err("[FAIL, create udmabuf]");
goto err_close_fd;
}
ctx->buf_mem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
ctx->fd, 0);
if (ctx->buf_mem == MAP_FAILED) {
pr_err("[FAIL, map udmabuf]");
goto err_close_fd;
}
return ctx;
err_close_fd:
close(ctx->fd);
err_close_memfd:
close(ctx->memfd);
err_close_dev:
close(ctx->devfd);
err_free_ctx:
free(ctx);
return NULL;
}
static void udmabuf_free(struct memory_buffer *ctx)
{
munmap(ctx->buf_mem, ctx->size);
close(ctx->fd);
close(ctx->memfd);
close(ctx->devfd);
free(ctx);
}
static void udmabuf_memcpy_to_device(struct memory_buffer *dst, size_t off,
void *src, int n)
{
struct dma_buf_sync sync = {};
sync.flags = DMA_BUF_SYNC_START | DMA_BUF_SYNC_WRITE;
ioctl(dst->fd, DMA_BUF_IOCTL_SYNC, &sync);
memcpy(dst->buf_mem + off, src, n);
sync.flags = DMA_BUF_SYNC_END | DMA_BUF_SYNC_WRITE;
ioctl(dst->fd, DMA_BUF_IOCTL_SYNC, &sync);
}
static void udmabuf_memcpy_from_device(void *dst, struct memory_buffer *src,
size_t off, int n)
{
struct dma_buf_sync sync = {};
sync.flags = DMA_BUF_SYNC_START;
ioctl(src->fd, DMA_BUF_IOCTL_SYNC, &sync);
memcpy(dst, src->buf_mem + off, n);
sync.flags = DMA_BUF_SYNC_END;
ioctl(src->fd, DMA_BUF_IOCTL_SYNC, &sync);
}
static struct memory_provider udmabuf_memory_provider = {
.alloc = udmabuf_alloc,
.free = udmabuf_free,
.memcpy_to_device = udmabuf_memcpy_to_device,
.memcpy_from_device = udmabuf_memcpy_from_device,
};
static struct memory_provider *provider = &udmabuf_memory_provider;
static void print_nonzero_bytes(void *ptr, size_t size)
{
unsigned char *p = ptr;
unsigned int i;
for (i = 0; i < size; i++)
putchar(p[i]);
}
int validate_buffer(void *line, size_t size)
{
static unsigned char seed = 1;
unsigned char *ptr = line;
unsigned char expected;
static int errors;
size_t i;
for (i = 0; i < size; i++) {
expected = seed ? seed : '\n';
if (ptr[i] != expected) {
fprintf(stderr,
"Failed validation: expected=%u, actual=%u, index=%lu\n",
expected, ptr[i], i);
errors++;
if (errors > 20) {
pr_err("validation failed");
return -1;
}
}
seed++;
if (seed == do_validation)
seed = 0;
}
fprintf(stdout, "Validated buffer\n");
return 0;
}
static int
__run_command(char *out, size_t outlen, const char *cmd, va_list args)
{
char command[256];
FILE *fp;
vsnprintf(command, sizeof(command), cmd, args);
fprintf(stderr, "Running: %s\n", command);
fp = popen(command, "r");
if (!fp)
return -1;
if (out) {
size_t len;
if (!fgets(out, outlen, fp))
return -1;
/* Remove trailing newline if present */
len = strlen(out);
if (len && out[len - 1] == '\n')
out[len - 1] = '\0';
}
return pclose(fp);
}
static int run_command(const char *cmd, ...)
{
va_list args;
int ret;
va_start(args, cmd);
ret = __run_command(NULL, 0, cmd, args);
va_end(args);
return ret;
}
static int ethtool_add_flow(const char *format, ...)
{
char local_output[256], cmd[256];
const char *id_start;
int flow_idx, ret;
char *endptr;
long flow_id;
va_list args;
for (flow_idx = 0; flow_idx < MAX_FLOWS; flow_idx++)
if (ntuple_ids[flow_idx] == -1)
break;
if (flow_idx == MAX_FLOWS) {
fprintf(stderr, "Error: too many flows\n");
return -1;
}
snprintf(cmd, sizeof(cmd), "ethtool -N %s %s", ifname, format);
va_start(args, format);
ret = __run_command(local_output, sizeof(local_output), cmd, args);
va_end(args);
if (ret != 0)
return ret;
/* Extract the ID from the output */
id_start = strstr(local_output, "Added rule with ID ");
if (!id_start)
return -1;
id_start += strlen("Added rule with ID ");
flow_id = strtol(id_start, &endptr, 10);
if (endptr == id_start || flow_id < 0 || flow_id > INT_MAX)
return -1;
fprintf(stderr, "Added flow rule with ID %ld\n", flow_id);
ntuple_ids[flow_idx] = flow_id;
return flow_id;
}
static int rxq_num(int ifindex)
{
struct ethtool_channels_get_req *req;
struct ethtool_channels_get_rsp *rsp;
struct ynl_error yerr;
struct ynl_sock *ys;
int num = -1;
ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return -1;
}
req = ethtool_channels_get_req_alloc();
ethtool_channels_get_req_set_header_dev_index(req, ifindex);
rsp = ethtool_channels_get(ys, req);
if (rsp)
num = rsp->rx_count + rsp->combined_count;
ethtool_channels_get_req_free(req);
ethtool_channels_get_rsp_free(rsp);
ynl_sock_destroy(ys);
return num;
}
static void reset_flow_steering(void)
{
int i;
for (i = 0; i < MAX_FLOWS; i++) {
if (ntuple_ids[i] == -1)
continue;
run_command("ethtool -N %s delete %d",
ifname, ntuple_ids[i]);
ntuple_ids[i] = -1;
}
}
static const char *tcp_data_split_str(int val)
{
switch (val) {
case 0:
return "off";
case 1:
return "auto";
case 2:
return "on";
default:
return "?";
}
}
static struct ethtool_rings_get_rsp *get_ring_config(void)
{
struct ethtool_rings_get_req *get_req;
struct ethtool_rings_get_rsp *get_rsp;
struct ynl_error yerr;
struct ynl_sock *ys;
ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return NULL;
}
get_req = ethtool_rings_get_req_alloc();
ethtool_rings_get_req_set_header_dev_index(get_req, ifindex);
get_rsp = ethtool_rings_get(ys, get_req);
ethtool_rings_get_req_free(get_req);
ynl_sock_destroy(ys);
return get_rsp;
}
static void restore_ring_config(const struct ethtool_rings_get_rsp *config)
{
struct ethtool_rings_get_req *get_req;
struct ethtool_rings_get_rsp *get_rsp;
struct ethtool_rings_set_req *req;
struct ynl_error yerr;
struct ynl_sock *ys;
int ret;
if (!config)
return;
ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return;
}
req = ethtool_rings_set_req_alloc();
ethtool_rings_set_req_set_header_dev_index(req, ifindex);
ethtool_rings_set_req_set_tcp_data_split(req,
ETHTOOL_TCP_DATA_SPLIT_UNKNOWN);
if (config->_present.hds_thresh)
ethtool_rings_set_req_set_hds_thresh(req, config->hds_thresh);
ret = ethtool_rings_set(ys, req);
if (ret < 0)
fprintf(stderr, "YNL restoring HDS cfg: %s\n", ys->err.msg);
get_req = ethtool_rings_get_req_alloc();
ethtool_rings_get_req_set_header_dev_index(get_req, ifindex);
get_rsp = ethtool_rings_get(ys, get_req);
ethtool_rings_get_req_free(get_req);
/* use explicit value if UKNOWN didn't give us the previous */
if (get_rsp->tcp_data_split != config->tcp_data_split) {
ethtool_rings_set_req_set_tcp_data_split(req,
config->tcp_data_split);
ret = ethtool_rings_set(ys, req);
if (ret < 0)
fprintf(stderr, "YNL restoring expl HDS cfg: %s\n",
ys->err.msg);
}
ethtool_rings_get_rsp_free(get_rsp);
ethtool_rings_set_req_free(req);
ynl_sock_destroy(ys);
}
static int
configure_headersplit(const struct ethtool_rings_get_rsp *old, bool on)
{
struct ethtool_rings_get_req *get_req;
struct ethtool_rings_get_rsp *get_rsp;
struct ethtool_rings_set_req *req;
struct ynl_error yerr;
struct ynl_sock *ys;
int ret;
ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return -1;
}
req = ethtool_rings_set_req_alloc();
ethtool_rings_set_req_set_header_dev_index(req, ifindex);
if (on) {
ethtool_rings_set_req_set_tcp_data_split(req,
ETHTOOL_TCP_DATA_SPLIT_ENABLED);
if (old->_present.hds_thresh)
ethtool_rings_set_req_set_hds_thresh(req, 0);
} else {
ethtool_rings_set_req_set_tcp_data_split(req,
ETHTOOL_TCP_DATA_SPLIT_UNKNOWN);
}
ret = ethtool_rings_set(ys, req);
if (ret < 0)
fprintf(stderr, "YNL failed: %s\n", ys->err.msg);
ethtool_rings_set_req_free(req);
if (ret == 0) {
get_req = ethtool_rings_get_req_alloc();
ethtool_rings_get_req_set_header_dev_index(get_req, ifindex);
get_rsp = ethtool_rings_get(ys, get_req);
ethtool_rings_get_req_free(get_req);
if (get_rsp)
fprintf(stderr, "TCP header split: %s\n",
tcp_data_split_str(get_rsp->tcp_data_split));
ethtool_rings_get_rsp_free(get_rsp);
}
ynl_sock_destroy(ys);
return ret;
}
static int configure_rss(void)
{
return run_command("ethtool -X %s equal %d >&2", ifname, start_queue);
}
static void reset_rss(void)
{
run_command("ethtool -X %s default >&2", ifname, start_queue);
}
static int check_changing_channels(unsigned int rx, unsigned int tx)
{
struct ethtool_channels_get_req *gchan;
struct ethtool_channels_set_req *schan;
struct ethtool_channels_get_rsp *chan;
struct ynl_error yerr;
struct ynl_sock *ys;
int ret;
fprintf(stderr, "setting channel count rx:%u tx:%u\n", rx, tx);
ys = ynl_sock_create(&ynl_ethtool_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return -1;
}
gchan = ethtool_channels_get_req_alloc();
if (!gchan) {
ret = -1;
goto exit_close_sock;
}
ethtool_channels_get_req_set_header_dev_index(gchan, ifindex);
chan = ethtool_channels_get(ys, gchan);
ethtool_channels_get_req_free(gchan);
if (!chan) {
fprintf(stderr, "YNL get channels: %s\n", ys->err.msg);
ret = -1;
goto exit_close_sock;
}
schan = ethtool_channels_set_req_alloc();
if (!schan) {
ret = -1;
goto exit_free_chan;
}
ethtool_channels_set_req_set_header_dev_index(schan, ifindex);
if (chan->_present.combined_count) {
if (chan->_present.rx_count || chan->_present.tx_count) {
ethtool_channels_set_req_set_rx_count(schan, 0);
ethtool_channels_set_req_set_tx_count(schan, 0);
}
if (rx == tx) {
ethtool_channels_set_req_set_combined_count(schan, rx);
} else if (rx > tx) {
ethtool_channels_set_req_set_combined_count(schan, tx);
ethtool_channels_set_req_set_rx_count(schan, rx - tx);
} else {
ethtool_channels_set_req_set_combined_count(schan, rx);
ethtool_channels_set_req_set_tx_count(schan, tx - rx);
}
} else if (chan->_present.rx_count) {
ethtool_channels_set_req_set_rx_count(schan, rx);
ethtool_channels_set_req_set_tx_count(schan, tx);
} else {
fprintf(stderr, "Error: device has neither combined nor rx channels\n");
ret = -1;
goto exit_free_schan;
}
ret = ethtool_channels_set(ys, schan);
if (ret) {
fprintf(stderr, "YNL set channels: %s\n", ys->err.msg);
} else {
/* We were expecting a failure, go back to previous settings */
ethtool_channels_set_req_set_combined_count(schan,
chan->combined_count);
ethtool_channels_set_req_set_rx_count(schan, chan->rx_count);
ethtool_channels_set_req_set_tx_count(schan, chan->tx_count);
ret = ethtool_channels_set(ys, schan);
if (ret)
fprintf(stderr, "YNL un-setting channels: %s\n",
ys->err.msg);
}
exit_free_schan:
ethtool_channels_set_req_free(schan);
exit_free_chan:
ethtool_channels_get_rsp_free(chan);
exit_close_sock:
ynl_sock_destroy(ys);
return ret;
}
static int configure_flow_steering(struct sockaddr_in6 *server_sin)
{
const char *type = "tcp6";
const char *server_addr;
char buf[40];
int flow_id;
inet_ntop(AF_INET6, &server_sin->sin6_addr, buf, sizeof(buf));
server_addr = buf;
if (IN6_IS_ADDR_V4MAPPED(&server_sin->sin6_addr)) {
type = "tcp4";
server_addr = strrchr(server_addr, ':') + 1;
}
/* Try configure 5-tuple */
flow_id = ethtool_add_flow("flow-type %s %s %s dst-ip %s %s %s dst-port %s queue %d",
type,
client_ip ? "src-ip" : "",
client_ip ?: "",
server_addr,
client_ip ? "src-port" : "",
client_ip ? port : "",
port, start_queue);
if (flow_id < 0) {
/* If that fails, try configure 3-tuple */
flow_id = ethtool_add_flow("flow-type %s dst-ip %s dst-port %s queue %d",
type, server_addr, port, start_queue);
if (flow_id < 0)
/* If that fails, return error */
return -1;
}
return 0;
}
static int bind_rx_queue(unsigned int ifindex, unsigned int dmabuf_fd,
struct netdev_queue_id *queues,
unsigned int n_queue_index, struct ynl_sock **ys)
{
struct netdev_bind_rx_req *req = NULL;
struct netdev_bind_rx_rsp *rsp = NULL;
struct ynl_error yerr;
*ys = ynl_sock_create(&ynl_netdev_family, &yerr);
if (!*ys) {
netdev_queue_id_free(queues);
fprintf(stderr, "YNL: %s\n", yerr.msg);
return -1;
}
req = netdev_bind_rx_req_alloc();
netdev_bind_rx_req_set_ifindex(req, ifindex);
netdev_bind_rx_req_set_fd(req, dmabuf_fd);
__netdev_bind_rx_req_set_queues(req, queues, n_queue_index);
rsp = netdev_bind_rx(*ys, req);
if (!rsp) {
perror("netdev_bind_rx");
goto err_close;
}
if (!rsp->_present.id) {
perror("id not present");
goto err_close;
}
fprintf(stderr, "got dmabuf id=%d\n", rsp->id);
dmabuf_id = rsp->id;
netdev_bind_rx_req_free(req);
netdev_bind_rx_rsp_free(rsp);
return 0;
err_close:
fprintf(stderr, "YNL failed: %s\n", (*ys)->err.msg);
netdev_bind_rx_req_free(req);
ynl_sock_destroy(*ys);
return -1;
}
static int bind_tx_queue(unsigned int ifindex, unsigned int dmabuf_fd,
struct ynl_sock **ys)
{
struct netdev_bind_tx_req *req = NULL;
struct netdev_bind_tx_rsp *rsp = NULL;
struct ynl_error yerr;
*ys = ynl_sock_create(&ynl_netdev_family, &yerr);
if (!*ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return -1;
}
req = netdev_bind_tx_req_alloc();
netdev_bind_tx_req_set_ifindex(req, ifindex);
netdev_bind_tx_req_set_fd(req, dmabuf_fd);
rsp = netdev_bind_tx(*ys, req);
if (!rsp) {
perror("netdev_bind_tx");
goto err_close;
}
if (!rsp->_present.id) {
perror("id not present");
goto err_close;
}
fprintf(stderr, "got tx dmabuf id=%d\n", rsp->id);
tx_dmabuf_id = rsp->id;
netdev_bind_tx_req_free(req);
netdev_bind_tx_rsp_free(rsp);
return 0;
err_close:
fprintf(stderr, "YNL failed: %s\n", (*ys)->err.msg);
netdev_bind_tx_req_free(req);
ynl_sock_destroy(*ys);
return -1;
}
static int enable_reuseaddr(int fd)
{
int opt = 1;
int ret;
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt));
if (ret) {
pr_err("SO_REUSEPORT failed");
return -1;
}
ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
if (ret) {
pr_err("SO_REUSEADDR failed");
return -1;
}
return 0;
}
static int parse_address(const char *str, int port, struct sockaddr_in6 *sin6)
{
int ret;
sin6->sin6_family = AF_INET6;
sin6->sin6_port = htons(port);
ret = inet_pton(sin6->sin6_family, str, &sin6->sin6_addr);
if (ret != 1) {
/* fallback to plain IPv4 */
ret = inet_pton(AF_INET, str, &sin6->sin6_addr.s6_addr32[3]);
if (ret != 1)
return -1;
/* add ::ffff prefix */
sin6->sin6_addr.s6_addr32[0] = 0;
sin6->sin6_addr.s6_addr32[1] = 0;
sin6->sin6_addr.s6_addr16[4] = 0;
sin6->sin6_addr.s6_addr16[5] = 0xffff;
}
return 0;
}
static struct netdev_queue_id *create_queues(void)
{
struct netdev_queue_id *queues;
size_t i = 0;
queues = netdev_queue_id_alloc(num_queues);
for (i = 0; i < num_queues; i++) {
netdev_queue_id_set_type(&queues[i], NETDEV_QUEUE_TYPE_RX);
netdev_queue_id_set_id(&queues[i], start_queue + i);
}
return queues;
}
static int do_server(struct memory_buffer *mem)
{
struct ethtool_rings_get_rsp *ring_config;
char ctrl_data[sizeof(int) * 20000];
size_t non_page_aligned_frags = 0;
struct sockaddr_in6 client_addr;
struct sockaddr_in6 server_sin;
size_t page_aligned_frags = 0;
size_t total_received = 0;
socklen_t client_addr_len;
bool is_devmem = false;
char *tmp_mem = NULL;
struct ynl_sock *ys;
char iobuf[819200];
int ret, err = -1;
char buffer[256];
int socket_fd;
int client_fd;
ret = parse_address(server_ip, atoi(port), &server_sin);
if (ret < 0) {
pr_err("parse server address");
return -1;
}
ring_config = get_ring_config();
if (!ring_config) {
pr_err("Failed to get current ring configuration");
return -1;
}
if (configure_headersplit(ring_config, 1)) {
pr_err("Failed to enable TCP header split");
goto err_free_ring_config;
}
/* Configure RSS to divert all traffic from our devmem queues */
if (configure_rss()) {
pr_err("Failed to configure rss");
goto err_reset_headersplit;
}
/* Flow steer our devmem flows to start_queue */
if (configure_flow_steering(&server_sin)) {
pr_err("Failed to configure flow steering");
goto err_reset_rss;
}
if (bind_rx_queue(ifindex, mem->fd, create_queues(), num_queues, &ys)) {
pr_err("Failed to bind");
goto err_reset_flow_steering;
}
tmp_mem = malloc(mem->size);
if (!tmp_mem)
goto err_unbind;
socket_fd = socket(AF_INET6, SOCK_STREAM, 0);
if (socket_fd < 0) {
pr_err("Failed to create socket");
goto err_free_tmp;
}
if (enable_reuseaddr(socket_fd))
goto err_close_socket;
fprintf(stderr, "binding to address %s:%d\n", server_ip,
ntohs(server_sin.sin6_port));
ret = bind(socket_fd, &server_sin, sizeof(server_sin));
if (ret) {
pr_err("Failed to bind");
goto err_close_socket;
}
ret = listen(socket_fd, 1);
if (ret) {
pr_err("Failed to listen");
goto err_close_socket;
}
client_addr_len = sizeof(client_addr);
inet_ntop(AF_INET6, &server_sin.sin6_addr, buffer,
sizeof(buffer));
fprintf(stderr, "Waiting or connection on %s:%d\n", buffer,
ntohs(server_sin.sin6_port));
client_fd = accept(socket_fd, &client_addr, &client_addr_len);
if (client_fd < 0) {
pr_err("Failed to accept");
goto err_close_socket;
}
inet_ntop(AF_INET6, &client_addr.sin6_addr, buffer,
sizeof(buffer));
fprintf(stderr, "Got connection from %s:%d\n", buffer,
ntohs(client_addr.sin6_port));
while (1) {
struct iovec iov = { .iov_base = iobuf,
.iov_len = sizeof(iobuf) };
struct dmabuf_cmsg *dmabuf_cmsg = NULL;
struct cmsghdr *cm = NULL;
struct msghdr msg = { 0 };
struct dmabuf_token token;
ssize_t ret;
is_devmem = false;
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = ctrl_data;
msg.msg_controllen = sizeof(ctrl_data);
ret = recvmsg(client_fd, &msg, MSG_SOCK_DEVMEM);
fprintf(stderr, "recvmsg ret=%ld\n", ret);
if (ret < 0 && (errno == EAGAIN || errno == EWOULDBLOCK))
continue;
if (ret < 0) {
perror("recvmsg");
if (errno == EFAULT) {
pr_err("received EFAULT, won't recover");
goto err_close_client;
}
continue;
}
if (ret == 0) {
errno = 0;
pr_err("client exited");
goto cleanup;
}
for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) {
if (cm->cmsg_level != SOL_SOCKET ||
(cm->cmsg_type != SCM_DEVMEM_DMABUF &&
cm->cmsg_type != SCM_DEVMEM_LINEAR)) {
fprintf(stderr, "skipping non-devmem cmsg\n");
continue;
}
dmabuf_cmsg = (struct dmabuf_cmsg *)CMSG_DATA(cm);
is_devmem = true;
if (cm->cmsg_type == SCM_DEVMEM_LINEAR) {
/* TODO: process data copied from skb's linear
* buffer.
*/
fprintf(stderr,
"SCM_DEVMEM_LINEAR. dmabuf_cmsg->frag_size=%u\n",
dmabuf_cmsg->frag_size);
continue;
}
token.token_start = dmabuf_cmsg->frag_token;
token.token_count = 1;
total_received += dmabuf_cmsg->frag_size;
fprintf(stderr,
"received frag_page=%llu, in_page_offset=%llu, frag_offset=%llu, frag_size=%u, token=%u, total_received=%lu, dmabuf_id=%u\n",
dmabuf_cmsg->frag_offset >> PAGE_SHIFT,
dmabuf_cmsg->frag_offset % getpagesize(),
dmabuf_cmsg->frag_offset,
dmabuf_cmsg->frag_size, dmabuf_cmsg->frag_token,
total_received, dmabuf_cmsg->dmabuf_id);
if (dmabuf_cmsg->dmabuf_id != dmabuf_id) {
pr_err("received on wrong dmabuf_id: flow steering error");
goto err_close_client;
}
if (dmabuf_cmsg->frag_size % getpagesize())
non_page_aligned_frags++;
else
page_aligned_frags++;
provider->memcpy_from_device(tmp_mem, mem,
dmabuf_cmsg->frag_offset,
dmabuf_cmsg->frag_size);
if (do_validation) {
if (validate_buffer(tmp_mem,
dmabuf_cmsg->frag_size))
goto err_close_client;
} else {
print_nonzero_bytes(tmp_mem,
dmabuf_cmsg->frag_size);
}
ret = setsockopt(client_fd, SOL_SOCKET,
SO_DEVMEM_DONTNEED, &token,
sizeof(token));
if (ret != 1) {
pr_err("SO_DEVMEM_DONTNEED not enough tokens");
goto err_close_client;
}
}
if (!is_devmem) {
pr_err("flow steering error");
goto err_close_client;
}
fprintf(stderr, "total_received=%lu\n", total_received);
}
fprintf(stderr, "%s: ok\n", TEST_PREFIX);
fprintf(stderr, "page_aligned_frags=%lu, non_page_aligned_frags=%lu\n",
page_aligned_frags, non_page_aligned_frags);
cleanup:
err = 0;
err_close_client:
close(client_fd);
err_close_socket:
close(socket_fd);
err_free_tmp:
free(tmp_mem);
err_unbind:
ynl_sock_destroy(ys);
err_reset_flow_steering:
reset_flow_steering();
err_reset_rss:
reset_rss();
err_reset_headersplit:
restore_ring_config(ring_config);
err_free_ring_config:
ethtool_rings_get_rsp_free(ring_config);
return err;
}
int run_devmem_tests(void)
{
struct ethtool_rings_get_rsp *ring_config;
struct netdev_queue_id *queues;
struct memory_buffer *mem;
struct ynl_sock *ys;
int err = -1;
mem = provider->alloc(getpagesize() * NUM_PAGES);
if (!mem) {
pr_err("Failed to allocate memory buffer");
return -1;
}
ring_config = get_ring_config();
if (!ring_config) {
pr_err("Failed to get current ring configuration");
goto err_free_mem;
}
/* Configure RSS to divert all traffic from our devmem queues */
if (configure_rss()) {
pr_err("rss error");
goto err_free_ring_config;
}
if (configure_headersplit(ring_config, 1)) {
pr_err("Failed to configure header split");
goto err_reset_rss;
}
queues = netdev_queue_id_alloc(num_queues);
if (!queues) {
pr_err("Failed to allocate empty queues array");
goto err_reset_headersplit;
}
if (!bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) {
pr_err("Binding empty queues array should have failed");
goto err_unbind;
}
if (configure_headersplit(ring_config, 0)) {
pr_err("Failed to configure header split");
goto err_reset_headersplit;
}
queues = create_queues();
if (!queues) {
pr_err("Failed to create queues");
goto err_reset_headersplit;
}
if (!bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) {
pr_err("Configure dmabuf with header split off should have failed");
goto err_unbind;
}
if (configure_headersplit(ring_config, 1)) {
pr_err("Failed to configure header split");
goto err_reset_headersplit;
}
queues = create_queues();
if (!queues) {
pr_err("Failed to create queues");
goto err_reset_headersplit;
}
if (bind_rx_queue(ifindex, mem->fd, queues, num_queues, &ys)) {
pr_err("Failed to bind");
goto err_reset_headersplit;
}
/* Deactivating a bound queue should not be legal */
if (!check_changing_channels(num_queues, num_queues)) {
pr_err("Deactivating a bound queue should be illegal");
goto err_unbind;
}
err = 0;
goto err_unbind;
err_unbind:
ynl_sock_destroy(ys);
err_reset_headersplit:
restore_ring_config(ring_config);
err_reset_rss:
reset_rss();
err_free_ring_config:
ethtool_rings_get_rsp_free(ring_config);
err_free_mem:
provider->free(mem);
return err;
}
static uint64_t gettimeofday_ms(void)
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (tv.tv_sec * 1000ULL) + (tv.tv_usec / 1000ULL);
}
static int do_poll(int fd)
{
struct pollfd pfd;
int ret;
pfd.revents = 0;
pfd.fd = fd;
ret = poll(&pfd, 1, waittime_ms);
if (ret == -1) {
pr_err("poll");
return -1;
}
return ret && (pfd.revents & POLLERR);
}
static int wait_compl(int fd)
{
int64_t tstop = gettimeofday_ms() + waittime_ms;
char control[CMSG_SPACE(100)] = {};
struct sock_extended_err *serr;
struct msghdr msg = {};
struct cmsghdr *cm;
__u32 hi, lo;
int ret;
msg.msg_control = control;
msg.msg_controllen = sizeof(control);
while (gettimeofday_ms() < tstop) {
ret = do_poll(fd);
if (ret < 0)
return ret;
if (!ret)
continue;
ret = recvmsg(fd, &msg, MSG_ERRQUEUE);
if (ret < 0) {
if (errno == EAGAIN)
continue;
pr_err("recvmsg(MSG_ERRQUEUE)");
return -1;
}
if (msg.msg_flags & MSG_CTRUNC) {
pr_err("MSG_CTRUNC");
return -1;
}
for (cm = CMSG_FIRSTHDR(&msg); cm; cm = CMSG_NXTHDR(&msg, cm)) {
if (cm->cmsg_level != SOL_IP &&
cm->cmsg_level != SOL_IPV6)
continue;
if (cm->cmsg_level == SOL_IP &&
cm->cmsg_type != IP_RECVERR)
continue;
if (cm->cmsg_level == SOL_IPV6 &&
cm->cmsg_type != IPV6_RECVERR)
continue;
serr = (void *)CMSG_DATA(cm);
if (serr->ee_origin != SO_EE_ORIGIN_ZEROCOPY) {
pr_err("wrong origin %u", serr->ee_origin);
return -1;
}
if (serr->ee_errno != 0) {
pr_err("wrong errno %d", serr->ee_errno);
return -1;
}
hi = serr->ee_data;
lo = serr->ee_info;
fprintf(stderr, "tx complete [%d,%d]\n", lo, hi);
return 0;
}
}
pr_err("did not receive tx completion");
return -1;
}
static int do_client(struct memory_buffer *mem)
{
char ctrl_data[CMSG_SPACE(sizeof(__u32))];
struct sockaddr_in6 server_sin;
struct sockaddr_in6 client_sin;
struct ynl_sock *ys = NULL;
struct iovec iov[MAX_IOV];
struct msghdr msg = {};
ssize_t line_size = 0;
struct cmsghdr *cmsg;
char *line = NULL;
int ret, err = -1;
size_t len = 0;
int socket_fd;
__u32 ddmabuf;
int opt = 1;
ret = parse_address(server_ip, atoi(port), &server_sin);
if (ret < 0) {
pr_err("parse server address");
return -1;
}
if (client_ip) {
ret = parse_address(client_ip, atoi(port), &client_sin);
if (ret < 0) {
pr_err("parse client address");
return ret;
}
}
socket_fd = socket(AF_INET6, SOCK_STREAM, 0);
if (socket_fd < 0) {
pr_err("create socket");
return -1;
}
if (enable_reuseaddr(socket_fd))
goto err_close_socket;
ret = setsockopt(socket_fd, SOL_SOCKET, SO_BINDTODEVICE, ifname,
strlen(ifname) + 1);
if (ret) {
pr_err("bindtodevice");
goto err_close_socket;
}
if (bind_tx_queue(ifindex, mem->fd, &ys)) {
pr_err("Failed to bind");
goto err_close_socket;
}
if (client_ip) {
ret = bind(socket_fd, &client_sin, sizeof(client_sin));
if (ret) {
pr_err("bind");
goto err_unbind;
}
}
ret = setsockopt(socket_fd, SOL_SOCKET, SO_ZEROCOPY, &opt, sizeof(opt));
if (ret) {
pr_err("set sock opt");
goto err_unbind;
}
fprintf(stderr, "Connect to %s %d (via %s)\n", server_ip,
ntohs(server_sin.sin6_port), ifname);
ret = connect(socket_fd, &server_sin, sizeof(server_sin));
if (ret) {
pr_err("connect");
goto err_unbind;
}
while (1) {
free(line);
line = NULL;
line_size = getline(&line, &len, stdin);
if (line_size < 0)
break;
if (max_chunk) {
msg.msg_iovlen =
(line_size + max_chunk - 1) / max_chunk;
if (msg.msg_iovlen > MAX_IOV) {
pr_err("can't partition %zd bytes into maximum of %d chunks",
line_size, MAX_IOV);
goto err_free_line;
}
for (int i = 0; i < msg.msg_iovlen; i++) {
iov[i].iov_base = (void *)(i * max_chunk);
iov[i].iov_len = max_chunk;
}
iov[msg.msg_iovlen - 1].iov_len =
line_size - (msg.msg_iovlen - 1) * max_chunk;
} else {
iov[0].iov_base = 0;
iov[0].iov_len = line_size;
msg.msg_iovlen = 1;
}
msg.msg_iov = iov;
provider->memcpy_to_device(mem, 0, line, line_size);
msg.msg_control = ctrl_data;
msg.msg_controllen = sizeof(ctrl_data);
cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_DEVMEM_DMABUF;
cmsg->cmsg_len = CMSG_LEN(sizeof(__u32));
ddmabuf = tx_dmabuf_id;
*((__u32 *)CMSG_DATA(cmsg)) = ddmabuf;
ret = sendmsg(socket_fd, &msg, MSG_ZEROCOPY);
if (ret < 0) {
pr_err("Failed sendmsg");
goto err_free_line;
}
fprintf(stderr, "sendmsg_ret=%d\n", ret);
if (ret != line_size) {
pr_err("Did not send all bytes %d vs %zd", ret, line_size);
goto err_free_line;
}
if (wait_compl(socket_fd))
goto err_free_line;
}
fprintf(stderr, "%s: tx ok\n", TEST_PREFIX);
err = 0;
err_free_line:
free(line);
err_unbind:
ynl_sock_destroy(ys);
err_close_socket:
close(socket_fd);
return err;
}
int main(int argc, char *argv[])
{
struct memory_buffer *mem;
int is_server = 0, opt;
int ret, err = 1;
while ((opt = getopt(argc, argv, "ls:c:p:v:q:t:f:z:")) != -1) {
switch (opt) {
case 'l':
is_server = 1;
break;
case 's':
server_ip = optarg;
break;
case 'c':
client_ip = optarg;
break;
case 'p':
port = optarg;
break;
case 'v':
do_validation = atoll(optarg);
break;
case 'q':
num_queues = atoi(optarg);
break;
case 't':
start_queue = atoi(optarg);
break;
case 'f':
ifname = optarg;
break;
case 'z':
max_chunk = atoi(optarg);
break;
case '?':
fprintf(stderr, "unknown option: %c\n", optopt);
break;
}
}
if (!ifname) {
pr_err("Missing -f argument");
return 1;
}
ifindex = if_nametoindex(ifname);
fprintf(stderr, "using ifindex=%u\n", ifindex);
if (!server_ip && !client_ip) {
if (start_queue < 0 && num_queues < 0) {
num_queues = rxq_num(ifindex);
if (num_queues < 0) {
pr_err("couldn't detect number of queues");
return 1;
}
if (num_queues < 2) {
pr_err("number of device queues is too low");
return 1;
}
/* make sure can bind to multiple queues */
start_queue = num_queues / 2;
num_queues /= 2;
}
if (start_queue < 0 || num_queues < 0) {
pr_err("Both -t and -q are required");
return 1;
}
return run_devmem_tests();
}
if (start_queue < 0 && num_queues < 0) {
num_queues = rxq_num(ifindex);
if (num_queues < 2) {
pr_err("number of device queues is too low");
return 1;
}
num_queues = 1;
start_queue = rxq_num(ifindex) - num_queues;
if (start_queue < 0) {
pr_err("couldn't detect number of queues");
return 1;
}
fprintf(stderr, "using queues %d..%d\n", start_queue, start_queue + num_queues);
}
for (; optind < argc; optind++)
fprintf(stderr, "extra arguments: %s\n", argv[optind]);
if (start_queue < 0) {
pr_err("Missing -t argument");
return 1;
}
if (num_queues < 0) {
pr_err("Missing -q argument");
return 1;
}
if (!server_ip) {
pr_err("Missing -s argument");
return 1;
}
if (!port) {
pr_err("Missing -p argument");
return 1;
}
mem = provider->alloc(getpagesize() * NUM_PAGES);
if (!mem) {
pr_err("Failed to allocate memory buffer");
return 1;
}
ret = is_server ? do_server(mem) : do_client(mem);
if (ret)
goto err_free_mem;
err = 0;
err_free_mem:
provider->free(mem);
return err;
}
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