X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=engines%2Fnet.c;h=df8b62597ef681392c76f25110d4dd9007b98870;hp=b1a4cdc21e4092d39b907526a25078cb184de4e1;hb=28cfeb6851703cf12b54b3a06bf3ff611198933e;hpb=2fc2698113c087352c1851bf5ebfcad6adb53932

diff --git a/engines/net.c b/engines/net.c
index b1a4cdc2..df8b6259 100644
--- a/engines/net.c
+++ b/engines/net.c
@@ -1,6 +1,8 @@
 /*
- * Transfer data over the net. Pretty basic setup, will only support
- * 1 file per thread/job.
+ * net engine
+ *
+ * IO engine that reads/writes to/from sockets.
+ *
  */
 #include <stdio.h>
 #include <stdlib.h>
@@ -10,207 +12,366 @@
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
+#include <sys/poll.h>
 
 #include "../fio.h"
-#include "../os.h"
 
-struct net_data {
+struct netio_data {
+	int listenfd;
 	int send_to_net;
-	struct io_u *last_io_u;
+	int use_splice;
+	int pipes[2];
+	char host[64];
+	struct sockaddr_in addr;
 };
 
-static int fio_netio_getevents(struct thread_data *td, int fio_unused min,
-				int max, struct timespec fio_unused *t)
+static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
 {
-	assert(max <= 1);
+	struct netio_data *nd = td->io_ops->data;
 
 	/*
-	 * we can only have one finished io_u for sync io, since the depth
-	 * is always 1
+	 * Make sure we don't see spurious reads to a receiver, and vice versa
 	 */
-	if (list_empty(&td->io_u_busylist))
-		return 0;
-
-	return 1;
+	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 struct io_u *fio_netio_event(struct thread_data *td, int event)
+static int splice_io_u(int fdin, int fdout, unsigned int len)
 {
-	struct net_data *nd = td->io_ops->data;
+	int bytes = 0;
+
+	while (len) {
+		int ret = splice(fdin, NULL, fdout, NULL, len, 0);
+
+		if (ret < 0) {
+			if (!bytes)
+				bytes = ret;
 
-	assert(event == 0);
+			break;
+		} else if (!ret)
+			break;
 
-	return nd->last_io_u;
+		bytes += ret;
+		len -= ret;
+	}
+
+	return bytes;
 }
 
-static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
+/*
+ * 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 net_data *nd = td->io_ops->data;
-	struct fio_file *f = io_u->file;
+	struct netio_data *nd = td->io_ops->data;
 
-	if (nd->send_to_net) {
-		if (io_u->ddir == DDIR_READ) {
-			td_verror(td, EINVAL);
-			return 1;
-		}
-	} else {
-		if (io_u->ddir == DDIR_WRITE) {
-			td_verror(td, EINVAL);
-			return 1;
-		}
+	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;
 	}
 
-	if (io_u->ddir == DDIR_SYNC)
-		return 0;
-	if (io_u->offset == f->last_completed_pos)
-		return 0;
+	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 offset is different from last end position, it's a seek.
-	 * As network io is purely sequential, we don't allow seeks.
+	 * if we are going to write more, set MSG_MORE
 	 */
-	td_verror(td, EINVAL);
-	return 1;
+	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 net_data *nd = td->io_ops->data;
-	struct fio_file *f = io_u->file;
-	unsigned int ret = 0;
-
-	if (io_u->ddir == DDIR_WRITE)
-		ret = write(f->fd, io_u->buf, io_u->buflen);
-	else if (io_u->ddir == DDIR_READ)
-		ret = read(f->fd, io_u->buf, io_u->buflen);
-
-	if (ret != io_u->buflen) {
-		if (ret > 0) {
-			io_u->resid = io_u->buflen - ret;
-			io_u->error = EIO;
+	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)
-		nd->last_io_u = io_u;
+	if (io_u->error)
+		td_verror(td, io_u->error, "xfer");
 
-	return io_u->error;
+	return FIO_Q_COMPLETED;
 }
 
-static int fio_netio_setup_connect(struct thread_data *td, const char *host,
-				   unsigned short port)
+static int fio_netio_connect(struct thread_data *td, struct fio_file *f)
 {
-	struct sockaddr_in addr;
-	struct fio_file *f;
-	int i;
+	struct netio_data *nd = td->io_ops->data;
 
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
-	addr.sin_port = htons(port);
+	f->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+	if (f->fd < 0) {
+		td_verror(td, errno, "socket");
+		return 1;
+	}
 
-	if (inet_aton(host, &addr.sin_addr) != 1) {
-		struct hostent *hent = gethostbyname(host);
+	if (connect(f->fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
+		td_verror(td, errno, "connect");
+		return 1;
+	}
 
-		if (!hent) {
-			td_vmsg(td, errno, "gethostbyname");
-			return 1;
-		}
+	return 0;
+}
 
-		memcpy(&addr.sin_addr, hent->h_addr, 4);
-	}
+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");
 
-	for_each_file(td, f, i) {
-		f->fd = socket(AF_INET, SOCK_STREAM, 0);
+	/*
+	 * 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_vmsg(td, errno, "socket");
+			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;
 
-		if (connect(f->fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
-			td_vmsg(td, errno, "connect");
+		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, unsigned short port)
+static int fio_netio_setup_listen(struct thread_data *td, short port)
 {
-	struct sockaddr_in addr;
-	socklen_t socklen;
-	struct fio_file *f;
-	int fd, opt, i;
+	struct netio_data *nd = td->io_ops->data;
+	int fd, opt;
 
-	fd = socket(AF_INET, SOCK_STREAM, 0);
+	fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 	if (fd < 0) {
-		td_vmsg(td, errno, "socket");
+		td_verror(td, errno, "socket");
 		return 1;
 	}
 
 	opt = 1;
 	if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0) {
-		td_vmsg(td, errno, "setsockopt");
+		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
 
-	memset(&addr, 0, sizeof(addr));
-	addr.sin_family = AF_INET;
-	addr.sin_addr.s_addr = htonl(INADDR_ANY);
-	addr.sin_port = htons(port);
+	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 *) &addr, sizeof(addr)) < 0) {
-		td_vmsg(td, errno, "bind");
+	if (bind(fd, (struct sockaddr *) &nd->addr, sizeof(nd->addr)) < 0) {
+		td_verror(td, errno, "bind");
 		return 1;
 	}
 	if (listen(fd, 1) < 0) {
-		td_vmsg(td, errno, "listen");
+		td_verror(td, errno, "listen");
 		return 1;
 	}
 
-	fprintf(f_out, "fio: waiting for %u connections\n", td->nr_files);
-
-	socklen = sizeof(addr);
-	for_each_file(td, f, i) {
-		f->fd = accept(fd, (struct sockaddr *) &addr, &socklen);
-		if (f->fd < 0) {
-			td_vmsg(td, errno, "accept");
-			return 1;
-		}
-	}
-
+	nd->listenfd = fd;
 	return 0;
 }
 
-static int fio_netio_setup(struct thread_data *td)
+static int fio_netio_init(struct thread_data *td)
 {
-	char host[64], buf[128];
-	struct net_data *nd;
+	struct netio_data *nd = td->io_ops->data;
 	unsigned short port;
-	struct fio_file *f;
+	char host[64], buf[128];
 	char *sep;
-	int ret, i;
+	int ret;
 
-	/*
-	 * work around for late init call
-	 */
-	if (td->io_ops->init(td))
-		return 1;
-
-	nd = td->io_ops->data;
-
-	if (td->iomix) {
+	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->filename);
+	strcpy(buf, td->o.filename);
 
-	sep = strchr(buf, ':');
+	sep = strchr(buf, '/');
 	if (!sep) {
-		log_err("fio: bad network host:port <<%s>>\n", td->filename);
+		log_err("fio: bad network host/port <<%s>>\n", td->o.filename);
 		return 1;
 	}
 
@@ -219,7 +380,7 @@ static int fio_netio_setup(struct thread_data *td)
 	strcpy(host, buf);
 	port = atoi(sep);
 
-	if (td->ddir == READ) {
+	if (td_read(td)) {
 		nd->send_to_net = 0;
 		ret = fio_netio_setup_listen(td, port);
 	} else {
@@ -227,64 +388,96 @@ static int fio_netio_setup(struct thread_data *td)
 		ret = fio_netio_setup_connect(td, host, port);
 	}
 
-	if (ret)
-		return ret;
+	return ret;
+}
 
-	td->io_size = td->total_file_size;
-	td->total_io_size = td->io_size;
+static void fio_netio_cleanup(struct thread_data *td)
+{
+	struct netio_data *nd = td->io_ops->data;
 
-	for_each_file(td, f, i) {
-		f->file_size = td->total_file_size / td->nr_files;
-		f->real_file_size = f->file_size;
-	}
+	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]);
 
-	return 0;
+		free(nd);
+		td->io_ops->data = NULL;
+	}
 }
 
-static void fio_netio_cleanup(struct thread_data *td)
+static int fio_netio_setup(struct thread_data *td)
 {
-	if (td->io_ops->data) {
-		free(td->io_ops->data);
-		td->io_ops->data = NULL;
+	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_init(struct thread_data *td)
+static int fio_netio_setup_splice(struct thread_data *td)
 {
-	struct net_data *nd;
+	struct netio_data *nd;
 
-	/*
-	 * Hack to work-around the ->setup() function calling init on its
-	 * own, since it needs ->io_ops->data to be set up.
-	 */
-	if (td->io_ops->data)
+	fio_netio_setup(td);
+
+	nd = td->io_ops->data;
+	if (nd) {
+		if (pipe(nd->pipes) < 0)
+			return 1;
+
+		nd->use_splice = 1;
 		return 0;
+	}
 
-	nd  = malloc(sizeof(*nd));
-	nd->last_io_u = NULL;
-	td->io_ops->data = nd;
-	return 0;
+	return 1;
 }
 
-static struct ioengine_ops ioengine = {
+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,
-	.getevents	= fio_netio_getevents,
-	.event		= fio_netio_event,
+	.setup		= fio_netio_setup_splice,
+	.init		= fio_netio_init,
 	.cleanup	= fio_netio_cleanup,
-	.setup		= fio_netio_setup,
-	.flags		= FIO_SYNCIO | FIO_NETIO,
+	.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);
+	register_ioengine(&ioengine_rw);
+	register_ioengine(&ioengine_splice);
 }
 
 static void fio_exit fio_netio_unregister(void)
 {
-	unregister_ioengine(&ioengine);
+	unregister_ioengine(&ioengine_rw);
+	unregister_ioengine(&ioengine_splice);
 }