X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=engines%2Frbd.c;h=081b4a040f6425c1f0dad7c8884d7f163c87fad6;hb=d9ed3e63e5280899e2e0bc7e55124c2a1acb30ca;hp=c85645aeac3ec921e6b599071e951d45b10ceb7c;hpb=6ec0dcd1f7c02db47f23eb5cc400772ea095704b;p=fio.git

diff --git a/engines/rbd.c b/engines/rbd.c
index c85645ae..081b4a04 100644
--- a/engines/rbd.c
+++ b/engines/rbd.c
@@ -10,6 +10,12 @@
 #include "../fio.h"
 #include "../optgroup.h"
 
+#ifdef CONFIG_RBD_POLL
+/* add for poll */
+#include <poll.h>
+#include <sys/eventfd.h>
+#endif
+
 struct fio_rbd_iou {
 	struct io_u *io_u;
 	rbd_completion_t completion;
@@ -23,6 +29,8 @@ struct rbd_data {
 	rbd_image_t image;
 	struct io_u **aio_events;
 	struct io_u **sort_events;
+	int fd; /* add for poll */
+	bool connected;
 };
 
 struct rbd_options {
@@ -98,6 +106,11 @@ static int _fio_setup_rbd_data(struct thread_data *td,
 	if (!rbd)
 		goto failed;
 
+	rbd->connected = false;
+
+	/* add for poll, init fd: -1 */
+	rbd->fd = -1;
+
 	rbd->aio_events = calloc(td->o.iodepth, sizeof(struct io_u *));
 	if (!rbd->aio_events)
 		goto failed;
@@ -121,6 +134,35 @@ failed:
 
 }
 
+#ifdef CONFIG_RBD_POLL
+static bool _fio_rbd_setup_poll(struct rbd_data *rbd)
+{
+	int r;
+
+	/* add for rbd poll */
+	rbd->fd = eventfd(0, EFD_SEMAPHORE);
+	if (rbd->fd < 0) {
+		log_err("eventfd failed.\n");
+		return false;
+	}
+
+	r = rbd_set_image_notification(rbd->image, rbd->fd, EVENT_TYPE_EVENTFD);
+	if (r < 0) {
+		log_err("rbd_set_image_notification failed.\n");
+		close(rbd->fd);
+		rbd->fd = -1;
+		return false;
+	}
+
+	return true;
+}
+#else
+static bool _fio_rbd_setup_poll(struct rbd_data *rbd)
+{
+	return true;
+}
+#endif
+
 static int _fio_rbd_connect(struct thread_data *td)
 {
 	struct rbd_data *rbd = td->io_ops_data;
@@ -182,8 +224,15 @@ static int _fio_rbd_connect(struct thread_data *td)
 		log_err("rbd_open failed.\n");
 		goto failed_open;
 	}
+
+	if (!_fio_rbd_setup_poll(rbd))
+		goto failed_poll;
+
 	return 0;
 
+failed_poll:
+	rbd_close(rbd->image);
+	rbd->image = NULL;
 failed_open:
 	rados_ioctx_destroy(rbd->io_ctx);
 	rbd->io_ctx = NULL;
@@ -199,6 +248,12 @@ static void _fio_rbd_disconnect(struct rbd_data *rbd)
 	if (!rbd)
 		return;
 
+	/* close eventfd */
+	if (rbd->fd != -1) {
+		close(rbd->fd);
+		rbd->fd = -1;
+	}
+
 	/* shutdown everything */
 	if (rbd->image) {
 		rbd_close(rbd->image);
@@ -229,7 +284,7 @@ static void _fio_rbd_finish_aiocb(rbd_completion_t comp, void *data)
 	 */
 	ret = rbd_aio_get_return_value(fri->completion);
 	if (ret < 0) {
-		io_u->error = ret;
+		io_u->error = -ret;
 		io_u->resid = io_u->xfer_buflen;
 	} else
 		io_u->error = 0;
@@ -298,9 +353,43 @@ static int rbd_iter_events(struct thread_data *td, unsigned int *events,
 	struct rbd_data *rbd = td->io_ops_data;
 	unsigned int this_events = 0;
 	struct io_u *io_u;
-	int i, sidx;
+	int i, sidx = 0;
+
+#ifdef CONFIG_RBD_POLL
+	int ret = 0;
+	int event_num = 0;
+	struct fio_rbd_iou *fri = NULL;
+	rbd_completion_t comps[min_evts];
+	uint64_t counter;
+	bool completed;
+
+	struct pollfd pfd;
+	pfd.fd = rbd->fd;
+	pfd.events = POLLIN;
+
+	ret = poll(&pfd, 1, wait ? -1 : 0);
+	if (ret <= 0)
+		return 0;
+	if (!(pfd.revents & POLLIN))
+		return 0;
+
+	event_num = rbd_poll_io_events(rbd->image, comps, min_evts);
 
-	sidx = 0;
+	for (i = 0; i < event_num; i++) {
+		fri = rbd_aio_get_arg(comps[i]);
+		io_u = fri->io_u;
+
+		/* best effort to decrement the semaphore */
+		ret = read(rbd->fd, &counter, sizeof(counter));
+		if (ret <= 0)
+			log_err("rbd_iter_events failed to decrement semaphore.\n");
+
+		completed = fri_check_complete(rbd, io_u, events);
+		assert(completed);
+
+		this_events++;
+	}
+#else
 	io_u_qiter(&td->io_u_all, io_u, i) {
 		if (!(io_u->flags & IO_U_F_FLIGHT))
 			continue;
@@ -312,6 +401,7 @@ static int rbd_iter_events(struct thread_data *td, unsigned int *events,
 		else if (wait)
 			rbd->sort_events[sidx++] = io_u;
 	}
+#endif
 
 	if (!wait || !sidx)
 		return this_events;
@@ -372,7 +462,8 @@ static int fio_rbd_getevents(struct thread_data *td, unsigned int min,
 	return events;
 }
 
-static int fio_rbd_queue(struct thread_data *td, struct io_u *io_u)
+static enum fio_q_status fio_rbd_queue(struct thread_data *td,
+				       struct io_u *io_u)
 {
 	struct rbd_data *rbd = td->io_ops_data;
 	struct fio_rbd_iou *fri = io_u->engine_data;
@@ -422,6 +513,7 @@ static int fio_rbd_queue(struct thread_data *td, struct io_u *io_u)
 	} else {
 		dprint(FD_IO, "%s: Warning: unhandled ddir: %d\n", __func__,
 		       io_u->ddir);
+		r = -EINVAL;
 		goto failed_comp;
 	}
 
@@ -429,7 +521,7 @@ static int fio_rbd_queue(struct thread_data *td, struct io_u *io_u)
 failed_comp:
 	rbd_aio_release(fri->completion);
 failed:
-	io_u->error = r;
+	io_u->error = -r;
 	td_verror(td, io_u->error, "xfer");
 	return FIO_Q_COMPLETED;
 }
@@ -437,6 +529,10 @@ failed:
 static int fio_rbd_init(struct thread_data *td)
 {
 	int r;
+	struct rbd_data *rbd = td->io_ops_data;
+
+	if (rbd->connected)
+		return 0;
 
 	r = _fio_rbd_connect(td);
 	if (r) {
@@ -467,13 +563,8 @@ static int fio_rbd_setup(struct thread_data *td)
 	rbd_image_info_t info;
 	struct fio_file *f;
 	struct rbd_data *rbd = NULL;
-	int major, minor, extra;
 	int r;
 
-	/* log version of librbd. No cluster connection required. */
-	rbd_version(&major, &minor, &extra);
-	log_info("rbd engine: RBD version: %d.%d.%d\n", major, minor, extra);
-
 	/* allocate engine specific structure to deal with librbd. */
 	r = _fio_setup_rbd_data(td, &rbd);
 	if (r) {
@@ -497,14 +588,20 @@ static int fio_rbd_setup(struct thread_data *td)
 		log_err("fio_rbd_connect failed.\n");
 		goto cleanup;
 	}
+	rbd->connected = true;
 
 	/* get size of the RADOS block device */
 	r = rbd_stat(rbd->image, &info, sizeof(info));
 	if (r < 0) {
 		log_err("rbd_status failed.\n");
-		goto disconnect;
+		goto cleanup;
+	} else if (info.size == 0) {
+		log_err("image size should be larger than zero.\n");
+		r = -EINVAL;
+		goto cleanup;
 	}
-	dprint(FD_IO, "rbd-engine: image size: %lu\n", info.size);
+
+	dprint(FD_IO, "rbd-engine: image size: %" PRIu64 "\n", info.size);
 
 	/* taken from "net" engine. Pretend we deal with files,
 	 * even if we do not have any ideas about files.
@@ -518,14 +615,8 @@ static int fio_rbd_setup(struct thread_data *td)
 	f = td->files[0];
 	f->real_file_size = info.size;
 
-	/* disconnect, then we were only connected to determine
-	 * the size of the RBD.
-	 */
-	_fio_rbd_disconnect(rbd);
 	return 0;
 
-disconnect:
-	_fio_rbd_disconnect(rbd);
 cleanup:
 	fio_rbd_cleanup(td);
 	return r;