X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=engines%2Fnet.c;h=94bae95af988e167143c089d015a1eda58b81d05;hp=cc707db972178a5cee9c8815d15ce6f97d963f16;hb=af8771b9b91eb2cd23a40aaa729bad4f78acb928;hpb=f4e62a5f3640dfe2d2119bbe1e40bf57747f6564

diff --git a/engines/net.c b/engines/net.c
index cc707db9..94bae95a 100644
--- a/engines/net.c
+++ b/engines/net.c
@@ -19,6 +19,8 @@
 struct netio_data {
 	int listenfd;
 	int send_to_net;
+	int use_splice;
+	int pipes[2];
 	char host[64];
 	struct sockaddr_in addr;
 };
@@ -26,7 +28,6 @@ struct netio_data {
 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
@@ -37,36 +38,183 @@ static int fio_netio_prep(struct thread_data *td, struct io_u *io_u)
 		return 1;
 	}
 		
-	if (io_u->ddir == DDIR_SYNC)
-		return 0;
-	if (io_u->offset == f->last_completed_pos)
-		return 0;
+	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)
+{
+	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, "cannot seek");
-	return 1;
+#ifdef MSG_MORE
+	if (td->this_io_bytes[DDIR_WRITE] + io_u->xfer_buflen < td->o.size)
+		flags = MSG_MORE;
+#endif
+
+	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 fio_file *f = io_u->file;
-	int ret, flags = 0;
+	struct netio_data *nd = td->io_ops->data;
+	int ret;
 
-	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;
+	fio_ro_check(td, io_u);
 
-		ret = send(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
+	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) {
-		flags = MSG_WAITALL;
-		ret = recv(f->fd, io_u->xfer_buf, io_u->xfer_buflen, flags);
+		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 */
 
@@ -147,7 +295,6 @@ static int fio_netio_accept(struct thread_data *td, struct fio_file *f)
 	return 0;
 }
 
-
 static int fio_netio_open_file(struct thread_data *td, struct fio_file *f)
 {
 	if (td_read(td))
@@ -222,7 +369,7 @@ static int fio_netio_setup_listen(struct thread_data *td, short port)
 static int fio_netio_init(struct thread_data *td)
 {
 	struct netio_data *nd = td->io_ops->data;
-	unsigned short port;
+	unsigned int port;
 	char host[64], buf[128];
 	char *sep;
 	int ret;
@@ -231,19 +378,26 @@ static int fio_netio_init(struct thread_data *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;
-	}
+	if (!sep)
+		goto bad_host;
 
 	*sep = '\0';
 	sep++;
 	strcpy(host, buf);
-	port = atoi(sep);
+	if (!strlen(host))
+		goto bad_host;
+
+	port = strtol(sep, NULL, 10);
+	if (!port || port > 65535)
+		goto bad_host;
 
 	if (td_read(td)) {
 		nd->send_to_net = 0;
@@ -254,6 +408,9 @@ static int fio_netio_init(struct thread_data *td)
 	}
 
 	return ret;
+bad_host:
+	log_err("fio: bad network host/port: %s\n", td->o.filename);
+	return 1;
 }
 
 static void fio_netio_cleanup(struct thread_data *td)
@@ -261,36 +418,68 @@ 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;
-	struct fio_file *f;
-	unsigned int i;
 
 	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;
-
-		for_each_file(td, f, i) {
-			if (td->o.size)
-				f->real_file_size = td->o.size / td->o.nr_files;
-			else
-				f->real_file_size = -1ULL;
-		}
 	}
 
 	return 0;
 }
 
-static struct ioengine_ops ioengine = {
+#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,
+	.flags		= FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
+			  FIO_SIGQUIT,
+};
+#endif
+
+static struct ioengine_ops ioengine_rw = {
 	.name		= "net",
 	.version	= FIO_IOOPS_VERSION,
 	.prep		= fio_netio_prep,
@@ -300,15 +489,22 @@ static struct ioengine_ops ioengine = {
 	.cleanup	= fio_netio_cleanup,
 	.open_file	= fio_netio_open_file,
 	.close_file	= generic_close_file,
-	.flags		= FIO_SYNCIO | FIO_DISKLESSIO,
+	.flags		= FIO_SYNCIO | FIO_DISKLESSIO | FIO_UNIDIR |
+			  FIO_SIGQUIT,
 };
 
 static void fio_init fio_netio_register(void)
 {
-	register_ioengine(&ioengine);
+	register_ioengine(&ioengine_rw);
+#ifdef FIO_HAVE_SPLICE
+	register_ioengine(&ioengine_splice);
+#endif
 }
 
 static void fio_exit fio_netio_unregister(void)
 {
-	unregister_ioengine(&ioengine);
+	unregister_ioengine(&ioengine_rw);
+#ifdef FIO_HAVE_SPLICE
+	unregister_ioengine(&ioengine_splice);
+#endif
 }