blob: cf6025f1aa5ca6ecce389654be999ca135369476 [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 <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
#include "../fio.h"
struct netio_data {
int listenfd;
int use_splice;
int pipes[2];
struct sockaddr_in addr;
struct sockaddr_un addr_un;
};
struct netio_options {
struct thread_data *td;
unsigned int port;
unsigned int proto;
unsigned int listen;
};
struct udp_close_msg {
uint32_t magic;
uint32_t cmd;
};
enum {
FIO_LINK_CLOSE = 0x89,
FIO_LINK_CLOSE_MAGIC = 0x6c696e6b,
FIO_TYPE_TCP = 1,
FIO_TYPE_UDP = 2,
FIO_TYPE_UNIX = 3,
};
static int str_hostname_cb(void *data, const char *input);
static struct fio_option options[] = {
{
.name = "hostname",
.type = FIO_OPT_STR_STORE,
.cb = str_hostname_cb,
.help = "Hostname for net IO engine",
},
{
.name = "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",
},
{
.name = "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",
},
{ .ival = "udp",
.oval = FIO_TYPE_UDP,
.help = "Unreliable Datagram Protocol",
},
{ .ival = "unix",
.oval = FIO_TYPE_UNIX,
.help = "UNIX domain socket",
},
},
},
{
.name = "listen",
.type = FIO_OPT_STR_SET,
.off1 = offsetof(struct netio_options, listen),
.help = "Listen for incoming TCP connections",
},
{
.name = NULL,
},
};
/*
* 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_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 (o->proto == FIO_TYPE_TCP)
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 FIO_HAVE_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 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 = OS_MSG_DONTWAIT;
do {
if (o->proto == FIO_TYPE_UDP) {
struct sockaddr *to = (struct sockaddr *) &nd->addr;
ret = sendto(io_u->file->fd, io_u->xfer_buf,
io_u->xfer_buflen, flags, to,
sizeof(*to));
} 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)
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;
flags &= ~OS_MSG_DONTWAIT;
} while (1);
return ret;
}
static int is_udp_close(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 (ntohl(msg->magic) != FIO_LINK_CLOSE_MAGIC)
return 0;
if (ntohl(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 = OS_MSG_DONTWAIT;
do {
if (o->proto == FIO_TYPE_UDP) {
fio_socklen_t len = sizeof(nd->addr);
struct sockaddr *from = (struct sockaddr *) &nd->addr;
ret = recvfrom(io_u->file->fd, io_u->xfer_buf,
io_u->xfer_buflen, flags, from, &len);
if (is_udp_close(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 (ret > 0)
break;
ret = poll_wait(td, io_u->file->fd, POLLIN);
if (ret <= 0)
break;
flags &= ~OS_MSG_DONTWAIT;
flags |= MSG_WAITALL;
} while (1);
return ret;
}
static int fio_netio_queue(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;
fio_ro_check(td, io_u);
if (io_u->ddir == DDIR_WRITE) {
if (!nd->use_splice || o->proto == FIO_TYPE_UDP ||
o->proto == FIO_TYPE_UNIX)
ret = fio_netio_send(td, io_u);
else
ret = fio_netio_splice_out(td, io_u);
} else if (io_u->ddir == DDIR_READ) {
if (!nd->use_splice || o->proto == FIO_TYPE_UDP ||
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 {
int err = errno;
if (io_u->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 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_UDP) {
domain = AF_INET;
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;
}
if (o->proto == FIO_TYPE_UDP)
return 0;
else if (o->proto == FIO_TYPE_TCP) {
fio_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 {
struct sockaddr_un *addr = &nd->addr_un;
fio_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;
fio_socklen_t socklen = sizeof(nd->addr);
if (o->proto == FIO_TYPE_UDP) {
f->fd = nd->listenfd;
return 0;
}
log_info("fio: waiting for connection\n");
if (poll_wait(td, nd->listenfd, POLLIN) < 0)
return 1;
f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
if (f->fd < 0) {
td_verror(td, errno, "accept");
return 1;
}
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;
}
static void fio_netio_udp_close(struct thread_data *td, struct fio_file *f)
{
struct netio_data *nd = td->io_ops->data;
struct udp_close_msg msg;
struct sockaddr *to = (struct sockaddr *) &nd->addr;
int ret;
msg.magic = htonl(FIO_LINK_CLOSE_MAGIC);
msg.cmd = htonl(FIO_LINK_CLOSE);
ret = sendto(f->fd, &msg, sizeof(msg), MSG_WAITALL, to,
sizeof(nd->addr));
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)
{
struct netio_options *o = td->eo;
/*
* If this is an UDP connection, notify the receiver that we are
* closing down the link
*/
if (o->proto == FIO_TYPE_UDP)
fio_netio_udp_close(td, f);
return generic_close_file(td, f);
}
static int fio_netio_setup_connect_inet(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_connect_unix(struct thread_data *td,
const char *path)
{
struct netio_data *nd = td->io_ops->data;
struct sockaddr_un *soun = &nd->addr_un;
soun->sun_family = AF_UNIX;
strcpy(soun->sun_path, path);
return 0;
}
static int fio_netio_setup_connect(struct thread_data *td)
{
struct netio_options *o = td->eo;
if (o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_TCP)
return fio_netio_setup_connect_inet(td, td->o.filename,o->port);
else
return fio_netio_setup_connect_unix(td, td->o.filename);
}
static int fio_netio_setup_listen_unix(struct thread_data *td, const char *path)
{
struct netio_data *nd = td->io_ops->data;
struct sockaddr_un *addr = &nd->addr_un;
mode_t mode;
int len, fd;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
log_err("fio: socket: %s\n", strerror(errno));
return -1;
}
mode = umask(000);
memset(addr, 0, sizeof(*addr));
addr->sun_family = AF_UNIX;
strcpy(addr->sun_path, path);
unlink(path);
len = sizeof(addr->sun_family) + strlen(path) + 1;
if (bind(fd, (struct sockaddr *) addr, len) < 0) {
log_err("fio: bind: %s\n", strerror(errno));
close(fd);
return -1;
}
umask(mode);
nd->listenfd = fd;
return 0;
}
static int fio_netio_setup_listen_inet(struct thread_data *td, short port)
{
struct netio_data *nd = td->io_ops->data;
struct netio_options *o = td->eo;
int fd, opt, type;
if (o->proto == FIO_TYPE_TCP)
type = SOCK_STREAM;
else
type = SOCK_DGRAM;
fd = socket(AF_INET, type, 0);
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;
}
nd->listenfd = fd;
return 0;
}
static int fio_netio_setup_listen(struct thread_data *td)
{
struct netio_data *nd = td->io_ops->data;
struct netio_options *o = td->eo;
int ret;
if (o->proto == FIO_TYPE_UDP || o->proto == FIO_TYPE_TCP)
ret = fio_netio_setup_listen_inet(td, o->port);
else
ret = fio_netio_setup_listen_unix(td, td->o.filename);
if (ret)
return ret;
if (o->proto == FIO_TYPE_UDP)
return 0;
if (listen(nd->listenfd, 10) < 0) {
td_verror(td, errno, "listen");
nd->listenfd = -1;
return 1;
}
return 0;
}
static int fio_netio_init(struct thread_data *td)
{
struct netio_options *o = td->eo;
int ret;
if (td_random(td)) {
log_err("fio: network IO can't be random\n");
return 1;
}
if (o->proto == FIO_TYPE_UNIX && o->port) {
log_err("fio: network IO port not valid with unix socket\n");
return 1;
} else if (o->proto != FIO_TYPE_UNIX && !o->port) {
log_err("fio: network IO requires port for tcp or udp\n");
return 1;
}
if (o->proto != FIO_TYPE_TCP) {
if (o->listen) {
log_err("fio: listen only valid for TCP proto IO\n");
return 1;
}
if (td_rw(td)) {
log_err("fio: datagram network connections must be"
" read OR write\n");
return 1;
}
if (o->proto == FIO_TYPE_UNIX && !td->o.filename) {
log_err("fio: UNIX sockets need host/filename\n");
return 1;
}
o->listen = td_read(td);
}
if (o->proto != FIO_TYPE_UNIX && o->listen && td->o.filename) {
log_err("fio: hostname not valid for inbound network IO\n");
return 1;
}
if (o->listen)
ret = fio_netio_setup_listen(td);
else
ret = fio_netio_setup_connect(td);
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);
}
}
static int fio_netio_setup(struct thread_data *td)
{
struct netio_data *nd;
if (!td->files_index) {
add_file(td, td->o.filename ?: "net");
td->o.nr_files = td->o.nr_files ?: 1;
}
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;
}
#ifdef FIO_HAVE_SPLICE
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_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,
.options = options,
.option_struct_size = sizeof(struct netio_options),
.flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
FIO_SIGTERM | FIO_PIPEIO,
};
#endif
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 = fio_netio_close_file,
.options = options,
.option_struct_size = sizeof(struct netio_options),
.flags = FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
FIO_SIGTERM | FIO_PIPEIO,
};
static int str_hostname_cb(void *data, const char *input)
{
struct netio_options *o = data;
if (o->td->o.filename)
free(o->td->o.filename);
o->td->o.filename = strdup(input);
return 0;
}
static void fio_init fio_netio_register(void)
{
register_ioengine(&ioengine_rw);
#ifdef FIO_HAVE_SPLICE
register_ioengine(&ioengine_splice);
#endif
}
static void fio_exit fio_netio_unregister(void)
{
unregister_ioengine(&ioengine_rw);
#ifdef FIO_HAVE_SPLICE
unregister_ioengine(&ioengine_splice);
#endif
}