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send-zerocopy.c
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send-zerocopy.c
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/* SPDX-License-Identifier: MIT */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <assert.h>
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdbool.h>
#include <string.h>
#include <arpa/inet.h>
#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <netinet/ip.h>
#include <netinet/in.h>
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/un.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <linux/mman.h>
#include "liburing.h"
#include "helpers.h"
#define MAX_MSG 128
#define HOST "127.0.0.1"
#define HOSTV6 "::1"
#define MAX_IOV 32
#define CORK_REQS 5
#define RX_TAG 10000
#define BUFFER_OFFSET 41
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
#endif
enum {
BUF_T_NORMAL,
BUF_T_SMALL,
BUF_T_NONALIGNED,
BUF_T_LARGE,
BUF_T_HUGETLB,
__BUF_NR,
};
/* 32MB, should be enough to trigger a short send */
#define LARGE_BUF_SIZE (1U << 25)
static size_t page_sz;
static char *tx_buffer, *rx_buffer;
static struct iovec buffers_iov[__BUF_NR];
static bool has_sendzc;
static bool has_sendmsg;
static bool hit_enomem;
static int probe_zc_support(void)
{
struct io_uring ring;
struct io_uring_probe *p;
int ret;
has_sendzc = has_sendmsg = false;
ret = io_uring_queue_init(1, &ring, 0);
if (ret)
return -1;
p = t_calloc(1, sizeof(*p) + 256 * sizeof(struct io_uring_probe_op));
if (!p)
return -1;
ret = io_uring_register_probe(&ring, p, 256);
if (ret)
return -1;
has_sendzc = p->ops_len > IORING_OP_SEND_ZC;
has_sendmsg = p->ops_len > IORING_OP_SENDMSG_ZC;
io_uring_queue_exit(&ring);
free(p);
return 0;
}
static bool check_cq_empty(struct io_uring *ring)
{
struct io_uring_cqe *cqe = NULL;
int ret;
ret = io_uring_peek_cqe(ring, &cqe); /* nothing should be there */
return ret == -EAGAIN;
}
static int test_basic_send(struct io_uring *ring, int sock_tx, int sock_rx)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int msg_flags = 0;
unsigned zc_flags = 0;
int payload_size = 100;
int ret;
sqe = io_uring_get_sqe(ring);
io_uring_prep_send_zc(sqe, sock_tx, tx_buffer, payload_size,
msg_flags, zc_flags);
sqe->user_data = 1;
ret = io_uring_submit(ring);
assert(ret == 1);
ret = io_uring_wait_cqe(ring, &cqe);
assert(!ret && cqe->user_data == 1);
if (cqe->res != payload_size) {
fprintf(stderr, "send failed %i\n", cqe->res);
return T_EXIT_FAIL;
}
assert(cqe->flags & IORING_CQE_F_MORE);
io_uring_cqe_seen(ring, cqe);
ret = io_uring_wait_cqe(ring, &cqe);
assert(!ret);
assert(cqe->user_data == 1);
assert(cqe->flags & IORING_CQE_F_NOTIF);
assert(!(cqe->flags & IORING_CQE_F_MORE));
io_uring_cqe_seen(ring, cqe);
assert(check_cq_empty(ring));
ret = recv(sock_rx, rx_buffer, payload_size, MSG_TRUNC);
assert(ret == payload_size);
return T_EXIT_PASS;
}
static int test_send_faults_check(struct io_uring *ring, int expected)
{
struct io_uring_cqe *cqe;
int ret, nr_cqes = 0;
bool more = true;
while (more) {
nr_cqes++;
ret = io_uring_wait_cqe(ring, &cqe);
assert(!ret);
assert(cqe->user_data == 1);
if (nr_cqes == 1 && (cqe->flags & IORING_CQE_F_NOTIF)) {
fprintf(stderr, "test_send_faults_check notif came first\n");
return -1;
}
if (!(cqe->flags & IORING_CQE_F_NOTIF)) {
if (cqe->res != expected) {
fprintf(stderr, "invalid cqe res %i vs expected %i, "
"user_data %i\n",
cqe->res, expected, (int)cqe->user_data);
return -1;
}
} else {
if (cqe->res != 0 || cqe->flags != IORING_CQE_F_NOTIF) {
fprintf(stderr, "invalid notif cqe %i %i\n",
cqe->res, cqe->flags);
return -1;
}
}
more = cqe->flags & IORING_CQE_F_MORE;
io_uring_cqe_seen(ring, cqe);
}
if (nr_cqes > 2) {
fprintf(stderr, "test_send_faults_check() too many CQEs %i\n",
nr_cqes);
return -1;
}
assert(check_cq_empty(ring));
return 0;
}
static int test_send_faults(int sock_tx, int sock_rx)
{
struct io_uring_sqe *sqe;
int msg_flags = 0;
unsigned zc_flags = 0;
int ret, payload_size = 100;
struct io_uring ring;
ret = io_uring_queue_init(32, &ring, 0);
if (ret) {
fprintf(stderr, "queue init failed: %d\n", ret);
return -1;
}
/* invalid buffer */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_send_zc(sqe, sock_tx, (void *)1UL, payload_size,
msg_flags, zc_flags);
sqe->user_data = 1;
ret = io_uring_submit(&ring);
assert(ret == 1);
ret = test_send_faults_check(&ring, -EFAULT);
if (ret) {
fprintf(stderr, "test_send_faults with invalid buf failed\n");
return -1;
}
/* invalid address */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_send_zc(sqe, sock_tx, tx_buffer, payload_size,
msg_flags, zc_flags);
io_uring_prep_send_set_addr(sqe, (const struct sockaddr *)1UL,
sizeof(struct sockaddr_in6));
sqe->user_data = 1;
ret = io_uring_submit(&ring);
assert(ret == 1);
ret = test_send_faults_check(&ring, -EFAULT);
if (ret) {
fprintf(stderr, "test_send_faults with invalid addr failed\n");
return -1;
}
/* invalid send/recv flags */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_send_zc(sqe, sock_tx, tx_buffer, payload_size,
msg_flags, ~0U);
sqe->user_data = 1;
ret = io_uring_submit(&ring);
assert(ret == 1);
ret = test_send_faults_check(&ring, -EINVAL);
if (ret) {
fprintf(stderr, "test_send_faults with invalid flags failed\n");
return -1;
}
return T_EXIT_PASS;
}
static int create_socketpair_ip(struct sockaddr_storage *addr,
int *sock_client, int *sock_server,
bool ipv6, bool client_connect,
bool msg_zc, bool tcp)
{
socklen_t addr_size;
int family, sock, listen_sock = -1;
int ret;
memset(addr, 0, sizeof(*addr));
if (ipv6) {
struct sockaddr_in6 *saddr = (struct sockaddr_in6 *)addr;
family = AF_INET6;
saddr->sin6_family = family;
saddr->sin6_port = htons(0);
addr_size = sizeof(*saddr);
} else {
struct sockaddr_in *saddr = (struct sockaddr_in *)addr;
family = AF_INET;
saddr->sin_family = family;
saddr->sin_port = htons(0);
saddr->sin_addr.s_addr = htonl(INADDR_ANY);
addr_size = sizeof(*saddr);
}
/* server sock setup */
if (tcp) {
sock = listen_sock = socket(family, SOCK_STREAM, IPPROTO_TCP);
} else {
sock = *sock_server = socket(family, SOCK_DGRAM, 0);
}
if (sock < 0) {
perror("socket");
return 1;
}
ret = bind(sock, (struct sockaddr *)addr, addr_size);
if (ret < 0) {
perror("bind");
return 1;
}
ret = getsockname(sock, (struct sockaddr *)addr, &addr_size);
if (ret < 0) {
fprintf(stderr, "getsockname failed %i\n", errno);
return 1;
}
if (tcp) {
ret = listen(sock, 128);
assert(ret != -1);
}
if (ipv6) {
struct sockaddr_in6 *saddr = (struct sockaddr_in6 *)addr;
inet_pton(AF_INET6, HOSTV6, &(saddr->sin6_addr));
} else {
struct sockaddr_in *saddr = (struct sockaddr_in *)addr;
inet_pton(AF_INET, HOST, &saddr->sin_addr);
}
/* client sock setup */
if (tcp) {
*sock_client = socket(family, SOCK_STREAM, IPPROTO_TCP);
assert(client_connect);
} else {
*sock_client = socket(family, SOCK_DGRAM, 0);
}
if (*sock_client < 0) {
perror("socket");
return 1;
}
if (client_connect) {
ret = connect(*sock_client, (struct sockaddr *)addr, addr_size);
if (ret < 0) {
perror("connect");
return 1;
}
}
if (msg_zc) {
#ifdef SO_ZEROCOPY
int val = 1;
/*
* NOTE: apps must not set SO_ZEROCOPY when using io_uring zc.
* It's only here to test interactions with MSG_ZEROCOPY.
*/
if (setsockopt(*sock_client, SOL_SOCKET, SO_ZEROCOPY, &val, sizeof(val))) {
perror("setsockopt zc");
return 1;
}
#else
fprintf(stderr, "no SO_ZEROCOPY\n");
return 1;
#endif
}
if (tcp) {
*sock_server = accept(listen_sock, NULL, NULL);
if (!*sock_server) {
fprintf(stderr, "can't accept\n");
return 1;
}
close(listen_sock);
}
return 0;
}
struct send_conf {
bool fixed_buf;
bool mix_register;
bool cork;
bool force_async;
bool use_sendmsg;
bool tcp;
bool zc;
bool iovec;
bool long_iovec;
bool poll_first;
int buf_index;
struct sockaddr_storage *addr;
};
static int do_test_inet_send(struct io_uring *ring, int sock_client, int sock_server,
struct send_conf *conf)
{
struct iovec iov[MAX_IOV];
struct msghdr msghdr[CORK_REQS];
const unsigned zc_flags = 0;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int nr_reqs = conf->cork ? CORK_REQS : 1;
int i, ret, nr_cqes, addr_len = 0;
size_t send_size = buffers_iov[conf->buf_index].iov_len;
size_t chunk_size = send_size / nr_reqs;
size_t chunk_size_last = send_size - chunk_size * (nr_reqs - 1);
char *buf = buffers_iov[conf->buf_index].iov_base;
assert(MAX_IOV >= CORK_REQS);
if (conf->addr) {
sa_family_t fam = ((struct sockaddr_in *)conf->addr)->sin_family;
addr_len = (fam == AF_INET) ? sizeof(struct sockaddr_in) :
sizeof(struct sockaddr_in6);
}
memset(rx_buffer, 0, send_size);
for (i = 0; i < nr_reqs; i++) {
bool real_fixed_buf = conf->fixed_buf;
size_t cur_size = chunk_size;
int msg_flags = MSG_WAITALL;
if (conf->mix_register)
real_fixed_buf = rand() & 1;
if (i != nr_reqs - 1)
msg_flags |= MSG_MORE;
else
cur_size = chunk_size_last;
sqe = io_uring_get_sqe(ring);
if (!conf->use_sendmsg) {
if (conf->zc) {
io_uring_prep_send_zc(sqe, sock_client, buf + i * chunk_size,
cur_size, msg_flags, zc_flags);
} else {
io_uring_prep_send(sqe, sock_client, buf + i * chunk_size,
cur_size, msg_flags);
}
if (real_fixed_buf) {
sqe->ioprio |= IORING_RECVSEND_FIXED_BUF;
sqe->buf_index = conf->buf_index;
}
if (conf->addr)
io_uring_prep_send_set_addr(sqe, (const struct sockaddr *)conf->addr,
addr_len);
} else {
struct iovec *io;
int iov_len;
if (conf->zc)
io_uring_prep_sendmsg_zc(sqe, sock_client, &msghdr[i], msg_flags);
else
io_uring_prep_sendmsg(sqe, sock_client, &msghdr[i], msg_flags);
if (!conf->iovec) {
io = &iov[i];
iov_len = 1;
iov[i].iov_len = cur_size;
iov[i].iov_base = buf + i * chunk_size;
} else {
char *it = buf;
int j;
assert(nr_reqs == 1);
iov_len = conf->long_iovec ? MAX_IOV : 4;
io = iov;
for (j = 0; j < iov_len; j++)
io[j].iov_len = 1;
/* first want to be easily advanced */
io[0].iov_base = it;
it += io[0].iov_len;
/* this should cause retry */
io[1].iov_len = chunk_size - iov_len + 1;
io[1].iov_base = it;
it += io[1].iov_len;
/* fill the rest */
for (j = 2; j < iov_len; j++) {
io[j].iov_base = it;
it += io[j].iov_len;
}
}
memset(&msghdr[i], 0, sizeof(msghdr[i]));
msghdr[i].msg_iov = io;
msghdr[i].msg_iovlen = iov_len;
if (conf->addr) {
msghdr[i].msg_name = conf->addr;
msghdr[i].msg_namelen = addr_len;
}
}
sqe->user_data = i;
if (conf->force_async)
sqe->flags |= IOSQE_ASYNC;
if (conf->poll_first)
sqe->ioprio |= IORING_RECVSEND_POLL_FIRST;
if (i != nr_reqs - 1)
sqe->flags |= IOSQE_IO_LINK;
}
sqe = io_uring_get_sqe(ring);
io_uring_prep_recv(sqe, sock_server, rx_buffer, send_size, MSG_WAITALL);
sqe->user_data = RX_TAG;
ret = io_uring_submit(ring);
if (ret != nr_reqs + 1) {
fprintf(stderr, "submit failed, got %i expected %i\n", ret, nr_reqs);
return 1;
}
nr_cqes = nr_reqs + 1;
for (i = 0; i < nr_cqes; i++) {
int expected = chunk_size;
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "io_uring_wait_cqe failed %i\n", ret);
return 1;
}
if (cqe->user_data == RX_TAG) {
if (cqe->res != send_size) {
fprintf(stderr, "rx failed res: %i, expected %i\n",
cqe->res, (int)send_size);
return 1;
}
io_uring_cqe_seen(ring, cqe);
continue;
}
if ((cqe->flags & IORING_CQE_F_MORE) && (cqe->flags & IORING_CQE_F_NOTIF)) {
fprintf(stderr, "unexpected cflags %i res %i\n",
cqe->flags, cqe->res);
return 1;
}
if (cqe->user_data >= nr_reqs) {
fprintf(stderr, "invalid user_data %lu\n",
(unsigned long)cqe->user_data);
return 1;
}
if (!(cqe->flags & IORING_CQE_F_NOTIF)) {
if (cqe->flags & IORING_CQE_F_MORE)
nr_cqes++;
if (cqe->user_data == nr_reqs - 1)
expected = chunk_size_last;
if (cqe->res != expected) {
if (cqe->res == -ENOMEM) {
if (!hit_enomem) {
fprintf(stderr, "Hit -ENOMEM. "
"Increase ulimit -l "
"limit for a complete "
"test run. Skipping "
"parts.\n");
hit_enomem = 1;
}
return 0;
}
fprintf(stderr, "invalid cqe->res %d expected %d\n",
cqe->res, expected);
return 1;
}
}
io_uring_cqe_seen(ring, cqe);
}
for (i = 0; i < send_size; i++) {
if (buf[i] != rx_buffer[i]) {
fprintf(stderr, "botched data, first mismated byte %i, "
"%u vs %u\n", i, buf[i], rx_buffer[i]);
return 1;
}
}
return 0;
}
static int test_inet_send(struct io_uring *ring)
{
struct send_conf conf;
struct sockaddr_storage addr;
int sock_client = -1, sock_server = -1;
int ret, j, i;
int buf_index;
for (j = 0; j < 32; j++) {
bool ipv6 = j & 1;
bool client_connect = j & 2;
bool msg_zc_set = j & 4;
bool tcp = j & 8;
bool swap_sockets = j & 16;
if (tcp && !client_connect)
continue;
if (swap_sockets && !tcp)
continue;
#ifndef SO_ZEROCOPY
if (msg_zc_set)
continue;
#endif
ret = create_socketpair_ip(&addr, &sock_client, &sock_server, ipv6,
client_connect, msg_zc_set, tcp);
if (ret) {
fprintf(stderr, "sock prep failed %d\n", ret);
return 1;
}
if (swap_sockets) {
int tmp_sock = sock_client;
sock_client = sock_server;
sock_server = tmp_sock;
}
for (i = 0; i < 1024; i++) {
bool regbuf;
conf.use_sendmsg = i & 1;
conf.poll_first = i & 2;
conf.fixed_buf = i & 4;
conf.addr = (i & 8) ? &addr : NULL;
conf.cork = i & 16;
conf.mix_register = i & 32;
conf.force_async = i & 64;
conf.zc = i & 128;
conf.iovec = i & 256;
conf.long_iovec = i & 512;
conf.tcp = tcp;
regbuf = conf.mix_register || conf.fixed_buf;
if (conf.iovec && (!conf.use_sendmsg || regbuf || conf.cork))
continue;
if (!conf.zc) {
if (regbuf)
continue;
/*
* Non zerocopy send w/ addr was added together with sendmsg_zc,
* skip if we the kernel doesn't support it.
*/
if (conf.addr && !has_sendmsg)
continue;
}
if (tcp && (conf.cork || conf.addr))
continue;
if (conf.mix_register && (!conf.cork || conf.fixed_buf))
continue;
if (!client_connect && conf.addr == NULL)
continue;
if (conf.use_sendmsg && (regbuf || !has_sendmsg))
continue;
if (msg_zc_set && !conf.zc)
continue;
for (buf_index = 0; buf_index < ARRAY_SIZE(buffers_iov); buf_index++) {
size_t len = buffers_iov[buf_index].iov_len;
if (!buffers_iov[buf_index].iov_base)
continue;
/* UDP IPv4 max datagram size is under 64K */
if (!tcp && len > (1U << 15))
continue;
conf.buf_index = buf_index;
ret = do_test_inet_send(ring, sock_client, sock_server, &conf);
if (ret) {
fprintf(stderr, "send failed fixed buf %i, "
"conn %i, addr %i, cork %i\n",
conf.fixed_buf, client_connect,
!!conf.addr, conf.cork);
return 1;
}
}
}
close(sock_client);
close(sock_server);
}
return 0;
}
static int test_async_addr(struct io_uring *ring)
{
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct sockaddr_storage addr;
int sock_tx = -1, sock_rx = -1;
struct __kernel_timespec ts;
int ret;
ts.tv_sec = 1;
ts.tv_nsec = 0;
ret = create_socketpair_ip(&addr, &sock_tx, &sock_rx, true, false, false, false);
if (ret) {
fprintf(stderr, "sock prep failed %d\n", ret);
return 1;
}
sqe = io_uring_get_sqe(ring);
io_uring_prep_timeout(sqe, &ts, 0, IORING_TIMEOUT_ETIME_SUCCESS);
sqe->user_data = 1;
sqe->flags |= IOSQE_IO_LINK;
sqe = io_uring_get_sqe(ring);
io_uring_prep_send_zc(sqe, sock_tx, tx_buffer, 1, 0, 0);
sqe->user_data = 2;
io_uring_prep_send_set_addr(sqe, (const struct sockaddr *)&addr,
sizeof(struct sockaddr_in6));
ret = io_uring_submit(ring);
assert(ret == 2);
memset(&addr, 0, sizeof(addr));
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "io_uring_wait_cqe failed %i\n", ret);
return 1;
}
if (cqe->user_data != 1 || cqe->res != -ETIME) {
fprintf(stderr, "invalid timeout res %i %i\n",
(int)cqe->user_data, cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "io_uring_wait_cqe failed %i\n", ret);
return 1;
}
if (cqe->user_data != 2 || cqe->res != 1) {
fprintf(stderr, "invalid send %i %i\n",
(int)cqe->user_data, cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
ret = recv(sock_rx, rx_buffer, 1, MSG_TRUNC);
assert(ret == 1);
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "io_uring_wait_cqe failed %i\n", ret);
return 1;
}
assert(cqe->flags & IORING_CQE_F_NOTIF);
io_uring_cqe_seen(ring, cqe);
close(sock_tx);
close(sock_rx);
return 0;
}
/* see also send_recv.c:test_invalid */
static int test_invalid_zc(int fds[2])
{
struct io_uring ring;
int ret;
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
bool notif = false;
if (!has_sendmsg)
return 0;
ret = t_create_ring(8, &ring, 0);
if (ret)
return ret;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_sendmsg(sqe, fds[0], NULL, MSG_WAITALL);
sqe->opcode = IORING_OP_SENDMSG_ZC;
sqe->flags |= IOSQE_ASYNC;
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "submit failed %i\n", ret);
return ret;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret)
return 1;
if (cqe->flags & IORING_CQE_F_MORE)
notif = true;
io_uring_cqe_seen(&ring, cqe);
if (notif) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret)
return 1;
io_uring_cqe_seen(&ring, cqe);
}
io_uring_queue_exit(&ring);
return 0;
}
static int run_basic_tests(void)
{
struct sockaddr_storage addr;
int ret, i, sp[2];
/* create TCP IPv6 pair */
ret = create_socketpair_ip(&addr, &sp[0], &sp[1], true, true, false, true);
if (ret) {
fprintf(stderr, "sock prep failed %d\n", ret);
return -1;
}
for (i = 0; i < 2; i++) {
struct io_uring ring;
unsigned ring_flags = 0;
if (i & 1)
ring_flags |= IORING_SETUP_DEFER_TASKRUN;
ret = io_uring_queue_init(32, &ring, ring_flags);
if (ret) {
if (ret == -EINVAL)
continue;
fprintf(stderr, "queue init failed: %d\n", ret);
return -1;
}
ret = test_basic_send(&ring, sp[0], sp[1]);
if (ret) {
fprintf(stderr, "test_basic_send() failed\n");
return -1;
}
ret = test_send_faults(sp[0], sp[1]);
if (ret) {
fprintf(stderr, "test_send_faults() failed\n");
return -1;
}
ret = test_invalid_zc(sp);
if (ret) {
fprintf(stderr, "test_invalid_zc() failed\n");
return -1;
}
ret = test_async_addr(&ring);
if (ret) {
fprintf(stderr, "test_async_addr() failed\n");
return T_EXIT_FAIL;
}
io_uring_queue_exit(&ring);
}
close(sp[0]);
close(sp[1]);
return 0;
}
int main(int argc, char *argv[])
{
size_t len;
int ret, i;
if (argc > 1)
return T_EXIT_SKIP;
ret = probe_zc_support();
if (ret) {
printf("probe failed\n");
return T_EXIT_FAIL;
}
if (!has_sendzc) {
printf("no IORING_OP_SEND_ZC support, skip\n");
return T_EXIT_SKIP;
}
page_sz = sysconf(_SC_PAGESIZE);
len = LARGE_BUF_SIZE;
tx_buffer = aligned_alloc(page_sz, len);
rx_buffer = aligned_alloc(page_sz, len);
if (tx_buffer && rx_buffer) {
buffers_iov[BUF_T_LARGE].iov_base = tx_buffer;
buffers_iov[BUF_T_LARGE].iov_len = len;
} else {
if (tx_buffer)
free(tx_buffer);
if (rx_buffer)
free(rx_buffer);
printf("skip large buffer tests, can't alloc\n");
len = 2 * page_sz;
tx_buffer = aligned_alloc(page_sz, len);
rx_buffer = aligned_alloc(page_sz, len);
}
if (!tx_buffer || !rx_buffer) {
fprintf(stderr, "can't allocate buffers\n");
return T_EXIT_FAIL;
}
srand((unsigned)time(NULL));
for (i = 0; i < len; i++)
tx_buffer[i] = i;
memset(rx_buffer, 0, len);
buffers_iov[BUF_T_NORMAL].iov_base = tx_buffer + page_sz;
buffers_iov[BUF_T_NORMAL].iov_len = page_sz;
buffers_iov[BUF_T_SMALL].iov_base = tx_buffer;
buffers_iov[BUF_T_SMALL].iov_len = 137;
buffers_iov[BUF_T_NONALIGNED].iov_base = tx_buffer + BUFFER_OFFSET;
buffers_iov[BUF_T_NONALIGNED].iov_len = 2 * page_sz - BUFFER_OFFSET - 13;
if (len == LARGE_BUF_SIZE) {
void *huge_page;
int off = page_sz + 27;
len = 1U << 22;
huge_page = mmap(NULL, len, PROT_READ|PROT_WRITE,
MAP_PRIVATE | MAP_HUGETLB | MAP_HUGE_2MB | MAP_ANONYMOUS,
-1, 0);
if (huge_page != MAP_FAILED) {
buffers_iov[BUF_T_HUGETLB].iov_base = huge_page + off;
buffers_iov[BUF_T_HUGETLB].iov_len = len - off;
}
}
ret = run_basic_tests();
if (ret)
return T_EXIT_FAIL;
for (i = 0; i < 2; i++) {
struct io_uring ring;
unsigned ring_flags = 0;
if (i & 1)
ring_flags |= IORING_SETUP_SINGLE_ISSUER |
IORING_SETUP_DEFER_TASKRUN;
ret = io_uring_queue_init(32, &ring, ring_flags);
if (ret) {
if (ret == -EINVAL)
continue;
fprintf(stderr, "queue init failed: %d\n", ret);
return -1;
}
ret = t_register_buffers(&ring, buffers_iov, ARRAY_SIZE(buffers_iov));
if (ret == T_SETUP_SKIP) {
fprintf(stderr, "can't register bufs, skip\n");
goto out;
} else if (ret != T_SETUP_OK) {
fprintf(stderr, "buffer registration failed %i\n", ret);
return T_EXIT_FAIL;
}
if (buffers_iov[BUF_T_HUGETLB].iov_base) {
buffers_iov[BUF_T_HUGETLB].iov_base += 13;
buffers_iov[BUF_T_HUGETLB].iov_len -= 26;
}
if (buffers_iov[BUF_T_LARGE].iov_base) {
buffers_iov[BUF_T_LARGE].iov_base += 13;
buffers_iov[BUF_T_LARGE].iov_len -= 26;
}
ret = test_inet_send(&ring);
if (ret) {
fprintf(stderr, "test_inet_send() failed (defer_taskrun %i)\n",
ring_flags & IORING_SETUP_DEFER_TASKRUN);
return T_EXIT_FAIL;
}
if (buffers_iov[BUF_T_HUGETLB].iov_base) {
buffers_iov[BUF_T_HUGETLB].iov_base -= 13;
buffers_iov[BUF_T_HUGETLB].iov_len += 26;
}
if (buffers_iov[BUF_T_LARGE].iov_base) {
buffers_iov[BUF_T_LARGE].iov_base -= 13;
buffers_iov[BUF_T_LARGE].iov_len += 26;
}
out:
io_uring_queue_exit(&ring);
}
return T_EXIT_PASS;
}