[fio.git] / engines / net.c

/*
 * 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;
	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;
	struct fio_file *f = io_u->file;

	/*
	 * 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;
	}
		
	if (io_u->ddir == DDIR_SYNC)
		return 0;
	if (io_u->offset == f->last_completed_pos)
		return 0;

	/*
	 * If offset is different from last end position, it's a seek.
	 * As network io is purely sequential, we don't allow seeks.
	 */
	td_verror(td, EINVAL, "cannot seek");
	return 1;
}

static int fio_netio_queue(struct thread_data *td, struct io_u *io_u)
{
	struct fio_file *f = io_u->file;
	int ret, flags = 0;

	if (io_u->ddir == DDIR_WRITE) {
		/*
		 * 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;

		ret = send(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
	} else if (io_u->ddir == DDIR_READ) {
		flags = MSG_WAITALL;
		ret = recv(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
	} 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);
		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) {
		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;
		td->io_ops->data = nd;
	}

	return 0;
}

static struct ioengine_ops ioengine = {
	.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,
};

static void fio_init fio_netio_register(void)
{
	register_ioengine(&ioengine);
}

static void fio_exit fio_netio_unregister(void)
{
	unregister_ioengine(&ioengine);
}
Commit	Line	Data
ed92ac0c	1	/*
da751ca9 JA	2	* net engine
	3	*
	4	* IO engine that reads/writes to/from sockets.
	5	*
ed92ac0c JA	6	*/
	7	#include <stdio.h>
	8	#include <stdlib.h>
	9	#include <unistd.h>
	10	#include <errno.h>
	11	#include <assert.h>
	12	#include <netinet/in.h>
	13	#include <arpa/inet.h>
	14	#include <netdb.h>
5fdd124a	15	#include <sys/poll.h>
ed92ac0c JA	16
ed92ac0c JA	17	#include "../fio.h"
ed92ac0c	18
b5af8293 JA	19	struct netio_data {
	20	int listenfd;
	21	int send_to_net;
	22	char host[64];
	23	struct sockaddr_in addr;
	24	};
ed92ac0c JA	25
	26	static int fio_netio_prep(struct thread_data td, struct io_u io_u)
	27	{
b5af8293	28	struct netio_data *nd = td->io_ops->data;
ed92ac0c JA	29	struct fio_file *f = io_u->file;
ed92ac0c JA	30
7a6499da JA	31	/*
	32	* Make sure we don't see spurious reads to a receiver, and vice versa
	33	*/
b5af8293 JA	34	if ((nd->send_to_net && io_u->ddir == DDIR_READ) \|\|
b5af8293 JA	35	(!nd->send_to_net && io_u->ddir == DDIR_WRITE)) {
e1161c32	36	td_verror(td, EINVAL, "bad direction");
7a6499da	37	return 1;
ed92ac0c	38	}
7a6499da	39
ed92ac0c JA	40	if (io_u->ddir == DDIR_SYNC)
	41	return 0;
	42	if (io_u->offset == f->last_completed_pos)
	43	return 0;
	44
e01547d2 JA	45	/*
	46	* If offset is different from last end position, it's a seek.
	47	* As network io is purely sequential, we don't allow seeks.
	48	*/
e1161c32	49	td_verror(td, EINVAL, "cannot seek");
ed92ac0c JA	50	return 1;
	51	}
	52
	53	static int fio_netio_queue(struct thread_data td, struct io_u io_u)
	54	{
ed92ac0c	55	struct fio_file *f = io_u->file;
d4f12dd0	56	int ret, flags = 0;
7a6499da JA	57
7a6499da JA	58	if (io_u->ddir == DDIR_WRITE) {
7a6499da JA	59	/*
	60	* if we are going to write more, set MSG_MORE
	61	*/
	62	if (td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen <
7bb48f84	63	td->o.size)
7a6499da	64	flags = MSG_MORE;
ed92ac0c	65
7a6499da	66	ret = send(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
d4f12dd0 JA	67	} else if (io_u->ddir == DDIR_READ) {
	68	flags = MSG_WAITALL;
	69	ret = recv(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
	70	} else
7a6499da	71	ret = 0; /* must be a SYNC */
ed92ac0c	72
cec6b55d	73	if (ret != (int) io_u->xfer_buflen) {
22819ec2	74	if (ret >= 0) {
cec6b55d JA	75	io_u->resid = io_u->xfer_buflen - ret;
cec6b55d JA	76	io_u->error = 0;
36167d82	77	return FIO_Q_COMPLETED;
ed92ac0c JA	78	} else
	79	io_u->error = errno;
	80	}
	81
36167d82	82	if (io_u->error)
e1161c32	83	td_verror(td, io_u->error, "xfer");
ed92ac0c	84
36167d82	85	return FIO_Q_COMPLETED;
ed92ac0c JA	86	}
ed92ac0c JA	87
b5af8293	88	static int fio_netio_connect(struct thread_data td, struct fio_file f)
ed92ac0c	89	{
b5af8293	90	struct netio_data *nd = td->io_ops->data;
ed92ac0c	91
b5af8293 JA	92	f->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	93	if (f->fd < 0) {
	94	td_verror(td, errno, "socket");
	95	return 1;
ed92ac0c JA	96	}
ed92ac0c JA	97
b5af8293 JA	98	if (connect(f->fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
	99	td_verror(td, errno, "connect");
	100	return 1;
ed92ac0c JA	101	}
	102
	103	return 0;
ed92ac0c JA	104	}
ed92ac0c JA	105
b5af8293	106	static int fio_netio_accept(struct thread_data td, struct fio_file f)
5fdd124a	107	{
b5af8293 JA	108	struct netio_data *nd = td->io_ops->data;
b5af8293 JA	109	socklen_t socklen = sizeof(nd->addr);
5fdd124a	110	struct pollfd pfd;
b5af8293	111	int ret;
5fdd124a	112
6d86144d	113	log_info("fio: waiting for connection\n");
5fdd124a JA	114
	115	/*
	116	* Accept loop. poll for incoming events, accept them. Repeat until we
	117	* have all connections.
	118	*/
b5af8293 JA	119	while (!td->terminate) {
b5af8293 JA	120	pfd.fd = nd->listenfd;
5fdd124a JA	121	pfd.events = POLLIN;
	122
	123	ret = poll(&pfd, 1, -1);
	124	if (ret < 0) {
	125	if (errno == EINTR)
	126	continue;
	127
e1161c32	128	td_verror(td, errno, "poll");
5fdd124a JA	129	break;
	130	} else if (!ret)
	131	continue;
	132
0c09442b JA	133	/*
	134	* should be impossible
	135	*/
	136	if (!(pfd.revents & POLLIN))
	137	continue;
	138
b5af8293 JA	139	f->fd = accept(nd->listenfd, (struct sockaddr *) &nd->addr, &socklen);
	140	if (f->fd < 0) {
	141	td_verror(td, errno, "accept");
	142	return 1;
	143	}
	144	break;
	145	}
5fdd124a	146
b5af8293 JA	147	return 0;
	148	}
	149
	150
	151	static int fio_netio_open_file(struct thread_data td, struct fio_file f)
	152	{
	153	if (td_read(td))
	154	return fio_netio_accept(td, f);
	155	else
	156	return fio_netio_connect(td, f);
	157	}
	158
	159	static int fio_netio_setup_connect(struct thread_data td, const char host,
	160	unsigned short port)
	161	{
	162	struct netio_data *nd = td->io_ops->data;
	163
	164	nd->addr.sin_family = AF_INET;
	165	nd->addr.sin_port = htons(port);
	166
	167	if (inet_aton(host, &nd->addr.sin_addr) != 1) {
	168	struct hostent *hent;
	169
	170	hent = gethostbyname(host);
	171	if (!hent) {
	172	td_verror(td, errno, "gethostbyname");
	173	return 1;
5fdd124a	174	}
b5af8293 JA	175
b5af8293 JA	176	memcpy(&nd->addr.sin_addr, hent->h_addr, 4);
5fdd124a JA	177	}
	178
	179	return 0;
	180	}
	181
b5af8293	182	static int fio_netio_setup_listen(struct thread_data *td, short port)
ed92ac0c	183	{
b5af8293	184	struct netio_data *nd = td->io_ops->data;
5fdd124a	185	int fd, opt;
ed92ac0c	186
6bedbfaf	187	fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
ed92ac0c	188	if (fd < 0) {
e1161c32	189	td_verror(td, errno, "socket");
ed92ac0c JA	190	return 1;
	191	}
	192
	193	opt = 1;
	194	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
e1161c32	195	td_verror(td, errno, "setsockopt");
ed92ac0c JA	196	return 1;
ed92ac0c JA	197	}
6bedbfaf JA	198	#ifdef SO_REUSEPORT
6bedbfaf JA	199	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &opt, sizeof(opt)) < 0) {
e1161c32	200	td_verror(td, errno, "setsockopt");
6bedbfaf JA	201	return 1;
	202	}
	203	#endif
ed92ac0c	204
b5af8293 JA	205	nd->addr.sin_family = AF_INET;
	206	nd->addr.sin_addr.s_addr = htonl(INADDR_ANY);
	207	nd->addr.sin_port = htons(port);
ed92ac0c	208
b5af8293	209	if (bind(fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
e1161c32	210	td_verror(td, errno, "bind");
ed92ac0c JA	211	return 1;
	212	}
	213	if (listen(fd, 1) < 0) {
e1161c32	214	td_verror(td, errno, "listen");
ed92ac0c JA	215	return 1;
	216	}
	217
b5af8293 JA	218	nd->listenfd = fd;
b5af8293 JA	219	return 0;
ed92ac0c JA	220	}
ed92ac0c JA	221
9bec88e1	222	static int fio_netio_init(struct thread_data *td)
ed92ac0c	223	{
b5af8293	224	struct netio_data *nd = td->io_ops->data;
e01547d2	225	unsigned short port;
b5af8293	226	char host[64], buf[128];
ed92ac0c	227	char *sep;
af52b345	228	int ret;
ed92ac0c	229
413dd459	230	if (td_rw(td)) {
ed92ac0c JA	231	log_err("fio: network connections must be read OR write\n");
	232	return 1;
	233	}
16d55aae JA	234	if (td_random(td)) {
	235	log_err("fio: network IO can't be random\n");
	236	return 1;
	237	}
ed92ac0c	238
2dc1bbeb	239	strcpy(buf, td->o.filename);
ed92ac0c	240
9f9214f2	241	sep = strchr(buf, '/');
ed92ac0c	242	if (!sep) {
2dc1bbeb	243	log_err("fio: bad network host/port <<%s>>\n", td->o.filename);
ed92ac0c JA	244	return 1;
	245	}
	246
	247	*sep = '\0';
	248	sep++;
	249	strcpy(host, buf);
e01547d2	250	port = atoi(sep);
ed92ac0c	251
413dd459	252	if (td_read(td)) {
b5af8293	253	nd->send_to_net = 0;
ed92ac0c JA	254	ret = fio_netio_setup_listen(td, port);
ed92ac0c JA	255	} else {
b5af8293	256	nd->send_to_net = 1;
ed92ac0c JA	257	ret = fio_netio_setup_connect(td, host, port);
	258	}
	259
7bb48f84	260	return ret;
ed92ac0c JA	261	}
ed92ac0c JA	262
b5af8293	263	static void fio_netio_cleanup(struct thread_data *td)
9bec88e1	264	{
b5af8293 JA	265	struct netio_data *nd = td->io_ops->data;
	266
	267	if (nd) {
	268	free(nd);
	269	td->io_ops->data = NULL;
	270	}
	271	}
	272
	273	static int fio_netio_setup(struct thread_data *td)
	274	{
7bb48f84	275	struct netio_data *nd;
7bb48f84 JA	276
	277	if (!td->io_ops->data) {
	278	nd = malloc(sizeof(*nd));;
	279
	280	memset(nd, 0, sizeof(*nd));
	281	nd->listenfd = -1;
	282	td->io_ops->data = nd;
7bb48f84	283	}
b5af8293	284
9bec88e1 JA	285	return 0;
	286	}
	287
ed92ac0c JA	288	static struct ioengine_ops ioengine = {
	289	.name = "net",
	290	.version = FIO_IOOPS_VERSION,
ed92ac0c JA	291	.prep = fio_netio_prep,
ed92ac0c JA	292	.queue = fio_netio_queue,
ed92ac0c	293	.setup = fio_netio_setup,
9bec88e1	294	.init = fio_netio_init,
b5af8293 JA	295	.cleanup = fio_netio_cleanup,
	296	.open_file = fio_netio_open_file,
	297	.close_file = generic_close_file,
	298	.flags = FIO_SYNCIO \| FIO_DISKLESSIO,
ed92ac0c JA	299	};
	300
	301	static void fio_init fio_netio_register(void)
	302	{
	303	register_ioengine(&ioengine);
	304	}
	305
	306	static void fio_exit fio_netio_unregister(void)
	307	{
	308	unregister_ioengine(&ioengine);
	309	}