blob: 60d53bc27a5bda48a9996185b03dc844e9cc631e [file] [log] [blame]
/*
* net engine
*
* IO engine that reads/writes to/from sockets.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <assert.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/poll.h>
#include "../fio.h"
struct netio_data {
int listenfd;
int send_to_net;
int use_splice;
int pipes[2];
char host[64];
struct sockaddr_in addr;
};
static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
{
struct netio_data *nd = td->io_ops->data;
/*
* Make sure we don't see spurious reads to a receiver, and vice versa
*/
if ((nd->send_to_net && io_u->ddir == DDIR_READ) ||
(!nd->send_to_net && io_u->ddir == DDIR_WRITE)) {
td_verror(td, EINVAL, "bad direction");
return 1;
}
return 0;
}
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;
}
static int fio_netio_send(struct thread_data *td, struct io_u *io_u)
{
int flags = 0;
/*
* if we are going to write more, set MSG_MORE
*/
if (td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen < td->o.size)
flags = MSG_MORE;
return send(io_u->file->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
}
static int fio_netio_recv(struct io_u *io_u)
{
int flags = MSG_WAITALL;
return recv(io_u->file->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
}
static int fio_netio_queue(struct thread_data *td, struct io_u *io_u)
{
struct netio_data *nd = td->io_ops->data;
int ret;
fio_ro_check(td, io_u);
if (io_u->ddir == DDIR_WRITE) {
if (nd->use_splice)
ret = fio_netio_splice_out(td, io_u);
else
ret = fio_netio_send(td, io_u);
} else if (io_u->ddir == DDIR_READ) {
if (nd->use_splice)
ret = fio_netio_splice_in(td, io_u);
else
ret = fio_netio_recv(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
io_u->error = errno;
}
if (io_u->error)
td_verror(td, io_u->error, "xfer");
return FIO_Q_COMPLETED;
}
static int fio_netio_connect(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops->data;
f->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (f->fd < 0) {
td_verror(td, errno, "socket");
return 1;
}
if (connect(f->fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
td_verror(td, errno, "connect");
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;
socklen_t socklen = sizeof(nd->addr);
struct pollfd pfd;
int ret;
log_info("fio: waiting for connection\n");
/*
* Accept loop. poll for incoming events, accept them. Repeat until we
* have all connections.
*/
while (!td->terminate) {
pfd.fd = nd->listenfd;
pfd.events = POLLIN;
ret = poll(&pfd, 1, -1);
printf("got ret %d\n", ret);
if (ret < 0) {
if (errno == EINTR)
continue;
td_verror(td, errno, "poll");
break;
} else if (!ret)
continue;
/*
* should be impossible
*/
if (!(pfd.revents & POLLIN))
continue;
f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
if (f->fd < 0) {
td_verror(td, errno, "accept");
return 1;
}
break;
}
return 0;
}
static int fio_netio_open_file(struct thread_data *td, struct fio_file *f)
{
if (td_read(td))
return fio_netio_accept(td, f);
else
return fio_netio_connect(td, f);
}
static int fio_netio_setup_connect(struct thread_data *td, const char *host,
unsigned short port)
{
struct netio_data *nd = td->io_ops->data;
nd->addr.sin_family = AF_INET;
nd->addr.sin_port = htons(port);
if (inet_aton(host, &nd->addr.sin_addr) != 1) {
struct hostent *hent;
hent = gethostbyname(host);
if (!hent) {
td_verror(td, errno, "gethostbyname");
return 1;
}
memcpy(&nd->addr.sin_addr, hent->h_addr, 4);
}
return 0;
}
static int fio_netio_setup_listen(struct thread_data *td, short port)
{
struct netio_data *nd = td->io_ops->data;
int fd, opt;
fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (fd < 0) {
td_verror(td, errno, "socket");
return 1;
}
opt = 1;
if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
td_verror(td, errno, "setsockopt");
return 1;
}
#ifdef SO_REUSEPORT
if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
td_verror(td, errno, "setsockopt");
return 1;
}
#endif
nd->addr.sin_family = AF_INET;
nd->addr.sin_addr.s_addr = htonl(INADDR_ANY);
nd->addr.sin_port = htons(port);
if (bind(fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
td_verror(td, errno, "bind");
return 1;
}
if (listen(fd, 1) < 0) {
td_verror(td, errno, "listen");
return 1;
}
nd->listenfd = fd;
return 0;
}
static int fio_netio_init(struct thread_data *td)
{
struct netio_data *nd = td->io_ops->data;
unsigned short port;
char host[64], buf[128];
char *sep;
int ret;
if (td_rw(td)) {
log_err("fio: network connections must be read OR write\n");
return 1;
}
if (td_random(td)) {
log_err("fio: network IO can't be random\n");
return 1;
}
strcpy(buf, td->o.filename);
sep = strchr(buf, '/');
if (!sep) {
log_err("fio: bad network host/port <<%s>>\n", td->o.filename);
return 1;
}
*sep = '\0';
sep++;
strcpy(host, buf);
port = atoi(sep);
if (td_read(td)) {
nd->send_to_net = 0;
ret = fio_netio_setup_listen(td, port);
} else {
nd->send_to_net = 1;
ret = fio_netio_setup_connect(td, host, port);
}
return ret;
}
static void fio_netio_cleanup(struct thread_data *td)
{
struct netio_data *nd = td->io_ops->data;
if (nd) {
if (nd->listenfd != -1)
close(nd->listenfd);
if (nd->pipes[0] != -1)
close(nd->pipes[0]);
if (nd->pipes[1] != -1)
close(nd->pipes[1]);
free(nd);
td->io_ops->data = NULL;
}
}
static int fio_netio_setup(struct thread_data *td)
{
struct netio_data *nd;
if (!td->io_ops->data) {
nd = malloc(sizeof(*nd));;
memset(nd, 0, sizeof(*nd));
nd->listenfd = -1;
nd->pipes[0] = nd->pipes[1] = -1;
td->io_ops->data = nd;
}
return 0;
}
static int fio_netio_setup_splice(struct thread_data *td)
{
struct netio_data *nd;
fio_netio_setup(td);
nd = td->io_ops->data;
if (nd) {
if (pipe(nd->pipes) < 0)
return 1;
nd->use_splice = 1;
return 0;
}
return 1;
}
static struct ioengine_ops ioengine_rw = {
.name = "net",
.version = FIO_IOOPS_VERSION,
.prep = fio_netio_prep,
.queue = fio_netio_queue,
.setup = fio_netio_setup,
.init = fio_netio_init,
.cleanup = fio_netio_cleanup,
.open_file = fio_netio_open_file,
.close_file = generic_close_file,
.flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
FIO_SIGQUIT,
};
static struct ioengine_ops ioengine_splice = {
.name = "netsplice",
.version = FIO_IOOPS_VERSION,
.prep = fio_netio_prep,
.queue = fio_netio_queue,
.setup = fio_netio_setup_splice,
.init = fio_netio_init,
.cleanup = fio_netio_cleanup,
.open_file = fio_netio_open_file,
.close_file = generic_close_file,
.flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
FIO_SIGQUIT,
};
static void fio_init fio_netio_register(void)
{
register_ioengine(&ioengine_rw);
register_ioengine(&ioengine_splice);
}
static void fio_exit fio_netio_unregister(void)
{
unregister_ioengine(&ioengine_rw);
unregister_ioengine(&ioengine_splice);
}