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net.c
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/*
* net engine
*
* IO engine that reads/writes to/from sockets.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <poll.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "../fio.h"
#include "../verify.h"
#include "../optgroup.h"
struct netio_data {
int listenfd;
int use_splice;
int seq_off;
int pipes[2];
struct sockaddr_in addr;
struct sockaddr_in6 addr6;
struct sockaddr_un addr_un;
uint64_t udp_send_seq;
uint64_t udp_recv_seq;
};
struct netio_options {
struct thread_data *td;
unsigned int port;
unsigned int proto;
unsigned int listen;
unsigned int pingpong;
unsigned int nodelay;
unsigned int ttl;
unsigned int window_size;
unsigned int mss;
char *intfc;
};
struct udp_close_msg {
uint32_t magic;
uint32_t cmd;
};
struct udp_seq {
uint64_t magic;
uint64_t seq;
uint64_t bs;
};
enum {
FIO_LINK_CLOSE = 0x89,
FIO_LINK_OPEN_CLOSE_MAGIC = 0x6c696e6b,
FIO_LINK_OPEN = 0x98,
FIO_UDP_SEQ_MAGIC = 0x657375716e556563ULL,
FIO_TYPE_TCP = 1,
FIO_TYPE_UDP = 2,
FIO_TYPE_UNIX = 3,
FIO_TYPE_TCP_V6 = 4,
FIO_TYPE_UDP_V6 = 5,
};
static int str_hostname_cb(void *data, const char *input);
static struct fio_option options[] = {
{
.name = "hostname",
.lname = "net engine hostname",
.type = FIO_OPT_STR_STORE,
.cb = str_hostname_cb,
.help = "Hostname for net IO engine",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
{
.name = "port",
.lname = "net engine port",
.type = FIO_OPT_INT,
.off1 = offsetof(struct netio_options, port),
.minval = 1,
.maxval = 65535,
.help = "Port to use for TCP or UDP net connections",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
{
.name = "protocol",
.lname = "net engine protocol",
.alias = "proto",
.type = FIO_OPT_STR,
.off1 = offsetof(struct netio_options, proto),
.help = "Network protocol to use",
.def = "tcp",
.posval = {
{ .ival = "tcp",
.oval = FIO_TYPE_TCP,
.help = "Transmission Control Protocol",
},
#ifdef CONFIG_IPV6
{ .ival = "tcpv6",
.oval = FIO_TYPE_TCP_V6,
.help = "Transmission Control Protocol V6",
},
#endif
{ .ival = "udp",
.oval = FIO_TYPE_UDP,
.help = "User Datagram Protocol",
},
#ifdef CONFIG_IPV6
{ .ival = "udpv6",
.oval = FIO_TYPE_UDP_V6,
.help = "User Datagram Protocol V6",
},
#endif
{ .ival = "unix",
.oval = FIO_TYPE_UNIX,
.help = "UNIX domain socket",
},
},
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
#ifdef CONFIG_TCP_NODELAY
{
.name = "nodelay",
.lname = "No Delay",
.type = FIO_OPT_BOOL,
.off1 = offsetof(struct netio_options, nodelay),
.help = "Use TCP_NODELAY on TCP connections",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
#endif
{
.name = "listen",
.lname = "net engine listen",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct netio_options, listen),
.help = "Listen for incoming TCP connections",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
{
.name = "pingpong",
.lname = "Ping Pong",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct netio_options, pingpong),
.help = "Ping-pong IO requests",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
{
.name = "interface",
.lname = "net engine interface",
.type = FIO_OPT_STR_STORE,
.off1 = offsetof(struct netio_options, intfc),
.help = "Network interface to use",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
{
.name = "ttl",
.lname = "net engine multicast ttl",
.type = FIO_OPT_INT,
.off1 = offsetof(struct netio_options, ttl),
.def = "1",
.minval = 0,
.help = "Time-to-live value for outgoing UDP multicast packets",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
#ifdef CONFIG_NET_WINDOWSIZE
{
.name = "window_size",
.lname = "Window Size",
.type = FIO_OPT_INT,
.off1 = offsetof(struct netio_options, window_size),
.minval = 0,
.help = "Set socket buffer window size",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
#endif
#ifdef CONFIG_NET_MSS
{
.name = "mss",
.lname = "Maximum segment size",
.type = FIO_OPT_INT,
.off1 = offsetof(struct netio_options, mss),
.minval = 0,
.help = "Set TCP maximum segment size",
.category = FIO_OPT_C_ENGINE,
.group = FIO_OPT_G_NETIO,
},
#endif
{
.name = NULL,
},
};
static inline int is_udp(struct netio_options *o)
{
return o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_UDP_V6;
}
static inline int is_tcp(struct netio_options *o)
{
return o->proto == FIO_TYPE_TCP || o->proto == FIO_TYPE_TCP_V6;
}
static inline int is_ipv6(struct netio_options *o)
{
return o->proto == FIO_TYPE_UDP_V6 || o->proto == FIO_TYPE_TCP_V6;
}
static int set_window_size(struct thread_data *td, int fd)
{
#ifdef CONFIG_NET_WINDOWSIZE
struct netio_options *o = td->eo;
unsigned int wss;
int snd, rcv, ret;
if (!o->window_size)
return 0;
rcv = o->listen || o->pingpong;
snd = !o->listen || o->pingpong;
wss = o->window_size;
ret = 0;
if (rcv) {
ret = setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void *) &wss,
sizeof(wss));
if (ret < 0)
td_verror(td, errno, "rcvbuf window size");
}
if (snd && !ret) {
ret = setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void *) &wss,
sizeof(wss));
if (ret < 0)
td_verror(td, errno, "sndbuf window size");
}
return ret;
#else
td_verror(td, -EINVAL, "setsockopt window size");
return -1;
#endif
}
static int set_mss(struct thread_data *td, int fd)
{
#ifdef CONFIG_NET_MSS
struct netio_options *o = td->eo;
unsigned int mss;
int ret;
if (!o->mss || !is_tcp(o))
return 0;
mss = o->mss;
ret = setsockopt(fd, IPPROTO_TCP, TCP_MAXSEG, (void *) &mss,
sizeof(mss));
if (ret < 0)
td_verror(td, errno, "setsockopt TCP_MAXSEG");
return ret;
#else
td_verror(td, -EINVAL, "setsockopt TCP_MAXSEG");
return -1;
#endif
}
/*
* Return -1 for error and 'nr events' for a positive number
* of events
*/
static int poll_wait(struct thread_data *td, int fd, short events)
{
struct pollfd pfd;
int ret;
while (!td->terminate) {
pfd.fd = fd;
pfd.events = events;
ret = poll(&pfd, 1, -1);
if (ret < 0) {
if (errno == EINTR)
break;
td_verror(td, errno, "poll");
return -1;
} else if (!ret)
continue;
break;
}
if (pfd.revents & events)
return 1;
return -1;
}
static int fio_netio_is_multicast(const char *mcaddr)
{
in_addr_t addr = inet_network(mcaddr);
if (addr == -1)
return 0;
if (inet_network("224.0.0.0") <= addr &&
inet_network("239.255.255.255") >= addr)
return 1;
return 0;
}
static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
{
struct netio_options *o = td->eo;
/*
* Make sure we don't see spurious reads to a receiver, and vice versa
*/
if (is_tcp(o))
return 0;
if ((o->listen && io_u->ddir == DDIR_WRITE) ||
(!o->listen && io_u->ddir == DDIR_READ)) {
td_verror(td, EINVAL, "bad direction");
return 1;
}
return 0;
}
#ifdef CONFIG_LINUX_SPLICE
static int splice_io_u(int fdin, int fdout, unsigned int len)
{
int bytes = 0;
while (len) {
int ret = splice(fdin, NULL, fdout, NULL, len, 0);
if (ret < 0) {
if (!bytes)
bytes = ret;
break;
} else if (!ret)
break;
bytes += ret;
len -= ret;
}
return bytes;
}
/*
* Receive bytes from a socket and fill them into the internal pipe
*/
static int splice_in(struct thread_data *td, struct io_u *io_u)
{
struct netio_data *nd = td->io_ops_data;
return splice_io_u(io_u->file->fd, nd->pipes[1], io_u->xfer_buflen);
}
/*
* Transmit 'len' bytes from the internal pipe
*/
static int splice_out(struct thread_data *td, struct io_u *io_u,
unsigned int len)
{
struct netio_data *nd = td->io_ops_data;
return splice_io_u(nd->pipes[0], io_u->file->fd, len);
}
static int vmsplice_io_u(struct io_u *io_u, int fd, unsigned int len)
{
struct iovec iov = {
.iov_base = io_u->xfer_buf,
.iov_len = len,
};
int bytes = 0;
while (iov.iov_len) {
int ret = vmsplice(fd, &iov, 1, SPLICE_F_MOVE);
if (ret < 0) {
if (!bytes)
bytes = ret;
break;
} else if (!ret)
break;
iov.iov_len -= ret;
iov.iov_base += ret;
bytes += ret;
}
return bytes;
}
/*
* vmsplice() pipe to io_u buffer
*/
static int vmsplice_io_u_out(struct thread_data *td, struct io_u *io_u,
unsigned int len)
{
struct netio_data *nd = td->io_ops_data;
return vmsplice_io_u(io_u, nd->pipes[0], len);
}
/*
* vmsplice() io_u to pipe
*/
static int vmsplice_io_u_in(struct thread_data *td, struct io_u *io_u)
{
struct netio_data *nd = td->io_ops_data;
return vmsplice_io_u(io_u, nd->pipes[1], io_u->xfer_buflen);
}
/*
* splice receive - transfer socket data into a pipe using splice, then map
* that pipe data into the io_u using vmsplice.
*/
static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
{
int ret;
ret = splice_in(td, io_u);
if (ret > 0)
return vmsplice_io_u_out(td, io_u, ret);
return ret;
}
/*
* splice transmit - map data from the io_u into a pipe by using vmsplice,
* then transfer that pipe to a socket using splice.
*/
static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
{
int ret;
ret = vmsplice_io_u_in(td, io_u);
if (ret > 0)
return splice_out(td, io_u, ret);
return ret;
}
#else
static int fio_netio_splice_in(struct thread_data *td, struct io_u *io_u)
{
errno = EOPNOTSUPP;
return -1;
}
static int fio_netio_splice_out(struct thread_data *td, struct io_u *io_u)
{
errno = EOPNOTSUPP;
return -1;
}
#endif
static void store_udp_seq(struct netio_data *nd, struct io_u *io_u)
{
struct udp_seq *us;
if (io_u->xfer_buflen < sizeof(*us))
return;
us = io_u->xfer_buf + io_u->xfer_buflen - sizeof(*us);
us->magic = cpu_to_le64((uint64_t) FIO_UDP_SEQ_MAGIC);
us->bs = cpu_to_le64((uint64_t) io_u->xfer_buflen);
us->seq = cpu_to_le64(nd->udp_send_seq++);
}
static void verify_udp_seq(struct thread_data *td, struct netio_data *nd,
struct io_u *io_u)
{
struct udp_seq *us;
uint64_t seq;
if (io_u->xfer_buflen < sizeof(*us))
return;
if (nd->seq_off)
return;
us = io_u->xfer_buf + io_u->xfer_buflen - sizeof(*us);
if (le64_to_cpu(us->magic) != FIO_UDP_SEQ_MAGIC)
return;
if (le64_to_cpu(us->bs) != io_u->xfer_buflen) {
nd->seq_off = 1;
return;
}
seq = le64_to_cpu(us->seq);
if (seq != nd->udp_recv_seq)
td->ts.drop_io_u[io_u->ddir] += seq - nd->udp_recv_seq;
nd->udp_recv_seq = seq + 1;
}
static int fio_netio_send(struct thread_data *td, struct io_u *io_u)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
int ret, flags = 0;
do {
if (is_udp(o)) {
const struct sockaddr *to;
socklen_t len;
if (is_ipv6(o)) {
to = (struct sockaddr *) &nd->addr6;
len = sizeof(nd->addr6);
} else {
to = (struct sockaddr *) &nd->addr;
len = sizeof(nd->addr);
}
if (td->o.verify == VERIFY_NONE)
store_udp_seq(nd, io_u);
ret = sendto(io_u->file->fd, io_u->xfer_buf,
io_u->xfer_buflen, flags, to, len);
} else {
/*
* if we are going to write more, set MSG_MORE
*/
#ifdef MSG_MORE
if ((td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen <
td->o.size) && !o->pingpong)
flags |= MSG_MORE;
#endif
ret = send(io_u->file->fd, io_u->xfer_buf,
io_u->xfer_buflen, flags);
}
if (ret > 0)
break;
ret = poll_wait(td, io_u->file->fd, POLLOUT);
if (ret <= 0)
break;
} while (1);
return ret;
}
static int is_close_msg(struct io_u *io_u, int len)
{
struct udp_close_msg *msg;
if (len != sizeof(struct udp_close_msg))
return 0;
msg = io_u->xfer_buf;
if (le32_to_cpu(msg->magic) != FIO_LINK_OPEN_CLOSE_MAGIC)
return 0;
if (le32_to_cpu(msg->cmd) != FIO_LINK_CLOSE)
return 0;
return 1;
}
static int fio_netio_recv(struct thread_data *td, struct io_u *io_u)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
int ret, flags = 0;
do {
if (is_udp(o)) {
struct sockaddr *from;
socklen_t l, *len = &l;
if (o->listen) {
if (!is_ipv6(o)) {
from = (struct sockaddr *) &nd->addr;
*len = sizeof(nd->addr);
} else {
from = (struct sockaddr *) &nd->addr6;
*len = sizeof(nd->addr6);
}
} else {
from = NULL;
len = NULL;
}
ret = recvfrom(io_u->file->fd, io_u->xfer_buf,
io_u->xfer_buflen, flags, from, len);
if (is_close_msg(io_u, ret)) {
td->done = 1;
return 0;
}
} else {
ret = recv(io_u->file->fd, io_u->xfer_buf,
io_u->xfer_buflen, flags);
if (is_close_msg(io_u, ret)) {
td->done = 1;
return 0;
}
}
if (ret > 0)
break;
else if (!ret && (flags & MSG_WAITALL))
break;
ret = poll_wait(td, io_u->file->fd, POLLIN);
if (ret <= 0)
break;
flags |= MSG_WAITALL;
} while (1);
if (is_udp(o) && td->o.verify == VERIFY_NONE)
verify_udp_seq(td, nd, io_u);
return ret;
}
static enum fio_q_status __fio_netio_queue(struct thread_data *td,
struct io_u *io_u,
enum fio_ddir ddir)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
int ret;
if (ddir == DDIR_WRITE) {
if (!nd->use_splice || is_udp(o) ||
o->proto == FIO_TYPE_UNIX)
ret = fio_netio_send(td, io_u);
else
ret = fio_netio_splice_out(td, io_u);
} else if (ddir == DDIR_READ) {
if (!nd->use_splice || is_udp(o) ||
o->proto == FIO_TYPE_UNIX)
ret = fio_netio_recv(td, io_u);
else
ret = fio_netio_splice_in(td, io_u);
} else
ret = 0; /* must be a SYNC */
if (ret != (int) io_u->xfer_buflen) {
if (ret > 0) {
io_u->resid = io_u->xfer_buflen - ret;
io_u->error = 0;
return FIO_Q_COMPLETED;
} else if (!ret)
return FIO_Q_BUSY;
else {
int err = errno;
if (ddir == DDIR_WRITE && err == EMSGSIZE)
return FIO_Q_BUSY;
io_u->error = err;
}
}
if (io_u->error)
td_verror(td, io_u->error, "xfer");
return FIO_Q_COMPLETED;
}
static enum fio_q_status fio_netio_queue(struct thread_data *td,
struct io_u *io_u)
{
struct netio_options *o = td->eo;
int ret;
fio_ro_check(td, io_u);
ret = __fio_netio_queue(td, io_u, io_u->ddir);
if (!o->pingpong || ret != FIO_Q_COMPLETED)
return ret;
/*
* For ping-pong mode, receive or send reply as needed
*/
if (td_read(td) && io_u->ddir == DDIR_READ)
ret = __fio_netio_queue(td, io_u, DDIR_WRITE);
else if (td_write(td) && io_u->ddir == DDIR_WRITE)
ret = __fio_netio_queue(td, io_u, DDIR_READ);
return ret;
}
static int fio_netio_connect(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
int type, domain;
if (o->proto == FIO_TYPE_TCP) {
domain = AF_INET;
type = SOCK_STREAM;
} else if (o->proto == FIO_TYPE_TCP_V6) {
domain = AF_INET6;
type = SOCK_STREAM;
} else if (o->proto == FIO_TYPE_UDP) {
domain = AF_INET;
type = SOCK_DGRAM;
} else if (o->proto == FIO_TYPE_UDP_V6) {
domain = AF_INET6;
type = SOCK_DGRAM;
} else if (o->proto == FIO_TYPE_UNIX) {
domain = AF_UNIX;
type = SOCK_STREAM;
} else {
log_err("fio: bad network type %d\n", o->proto);
f->fd = -1;
return 1;
}
f->fd = socket(domain, type, 0);
if (f->fd < 0) {
td_verror(td, errno, "socket");
return 1;
}
#ifdef CONFIG_TCP_NODELAY
if (o->nodelay && is_tcp(o)) {
int optval = 1;
if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) {
log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno));
return 1;
}
}
#endif
if (set_window_size(td, f->fd)) {
close(f->fd);
return 1;
}
if (set_mss(td, f->fd)) {
close(f->fd);
return 1;
}
if (is_udp(o)) {
if (!fio_netio_is_multicast(td->o.filename))
return 0;
if (is_ipv6(o)) {
log_err("fio: multicast not supported on IPv6\n");
close(f->fd);
return 1;
}
if (o->intfc) {
struct in_addr interface_addr;
if (inet_aton(o->intfc, &interface_addr) == 0) {
log_err("fio: interface not valid interface IP\n");
close(f->fd);
return 1;
}
if (setsockopt(f->fd, IPPROTO_IP, IP_MULTICAST_IF, (const char*)&interface_addr, sizeof(interface_addr)) < 0) {
td_verror(td, errno, "setsockopt IP_MULTICAST_IF");
close(f->fd);
return 1;
}
}
if (setsockopt(f->fd, IPPROTO_IP, IP_MULTICAST_TTL, (const char*)&o->ttl, sizeof(o->ttl)) < 0) {
td_verror(td, errno, "setsockopt IP_MULTICAST_TTL");
close(f->fd);
return 1;
}
return 0;
} else if (o->proto == FIO_TYPE_TCP) {
socklen_t len = sizeof(nd->addr);
if (connect(f->fd, (struct sockaddr *) &nd->addr, len) < 0) {
td_verror(td, errno, "connect");
close(f->fd);
return 1;
}
} else if (o->proto == FIO_TYPE_TCP_V6) {
socklen_t len = sizeof(nd->addr6);
if (connect(f->fd, (struct sockaddr *) &nd->addr6, len) < 0) {
td_verror(td, errno, "connect");
close(f->fd);
return 1;
}
} else {
struct sockaddr_un *addr = &nd->addr_un;
socklen_t len;
len = sizeof(addr->sun_family) + strlen(addr->sun_path) + 1;
if (connect(f->fd, (struct sockaddr *) addr, len) < 0) {
td_verror(td, errno, "connect");
close(f->fd);
return 1;
}
}
return 0;
}
static int fio_netio_accept(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
socklen_t socklen;
int state;
if (is_udp(o)) {
f->fd = nd->listenfd;
return 0;
}
state = td->runstate;
td_set_runstate(td, TD_SETTING_UP);
log_info("fio: waiting for connection\n");
if (poll_wait(td, nd->listenfd, POLLIN) < 0)
goto err;
if (o->proto == FIO_TYPE_TCP) {
socklen = sizeof(nd->addr);
f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
} else {
socklen = sizeof(nd->addr6);
f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr6, &socklen);
}
if (f->fd < 0) {
td_verror(td, errno, "accept");
goto err;
}
#ifdef CONFIG_TCP_NODELAY
if (o->nodelay && is_tcp(o)) {
int optval = 1;
if (setsockopt(f->fd, IPPROTO_TCP, TCP_NODELAY, (void *) &optval, sizeof(int)) < 0) {
log_err("fio: cannot set TCP_NODELAY option on socket (%s), disable with 'nodelay=0'\n", strerror(errno));
return 1;
}
}
#endif
reset_all_stats(td);
td_set_runstate(td, state);
return 0;
err:
td_set_runstate(td, state);
return 1;
}
static void fio_netio_send_close(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
struct udp_close_msg msg;
struct sockaddr *to;
socklen_t len;
int ret;
if (is_ipv6(o)) {
to = (struct sockaddr *) &nd->addr6;
len = sizeof(nd->addr6);
} else {
to = (struct sockaddr *) &nd->addr;
len = sizeof(nd->addr);
}
msg.magic = cpu_to_le32((uint32_t) FIO_LINK_OPEN_CLOSE_MAGIC);
msg.cmd = cpu_to_le32((uint32_t) FIO_LINK_CLOSE);
ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, len);
if (ret < 0)
td_verror(td, errno, "sendto udp link close");
}
static int fio_netio_close_file(struct thread_data *td, struct fio_file *f)
{
/*
* Notify the receiver that we are closing down the link
*/
fio_netio_send_close(td, f);
return generic_close_file(td, f);
}
static int fio_netio_udp_recv_open(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
struct udp_close_msg msg;
struct sockaddr *to;
socklen_t len;
int ret;
if (is_ipv6(o)) {
len = sizeof(nd->addr6);
to = (struct sockaddr *) &nd->addr6;
} else {
len = sizeof(nd->addr);
to = (struct sockaddr *) &nd->addr;
}
ret = recvfrom(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, &len);
if (ret < 0) {
td_verror(td, errno, "recvfrom udp link open");
return ret;
}
if (ntohl(msg.magic) != FIO_LINK_OPEN_CLOSE_MAGIC ||
ntohl(msg.cmd) != FIO_LINK_OPEN) {
log_err("fio: bad udp open magic %x/%x\n",
(unsigned int) ntohl(msg.magic),
(unsigned int) ntohl(msg.cmd));
return -1;
}
fio_gettime(&td->start, NULL);
return 0;
}
static int fio_netio_send_open(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops_data;
struct netio_options *o = td->eo;
struct udp_close_msg msg;
struct sockaddr *to;
socklen_t len;
int ret;
if (is_ipv6(o)) {
len = sizeof(nd->addr6);
to = (struct sockaddr *) &nd->addr6;
} else {
len = sizeof(nd->addr);
to = (struct sockaddr *) &nd->addr;
}
msg.magic = htonl(FIO_LINK_OPEN_CLOSE_MAGIC);
msg.cmd = htonl(FIO_LINK_OPEN);
ret = sendto(f->fd, (void *) &msg, sizeof(msg), MSG_WAITALL, to, len);
if (ret < 0) {
td_verror(td, errno, "sendto udp link open");
return ret;
}
return 0;
}
static int fio_netio_open_file(struct thread_data *td, struct fio_file *f)
{
int ret;
struct netio_options *o = td->eo;
if (o->listen)
ret = fio_netio_accept(td, f);
else
ret = fio_netio_connect(td, f);
if (ret) {
f->fd = -1;
return ret;
}
if (is_udp(o)) {
if (td_write(td))
ret = fio_netio_send_open(td, f);
else {
int state;