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Date: Wed, 20 May 2020 19:07:14 +0200
From: Stefano Garzarella <sgarzare@...hat.com>
To: Jens Axboe <axboe@...nel.dk>
Cc: linux-kernel@...r.kernel.org, io-uring@...r.kernel.org
Subject: [PATCH liburing v2 5/5] Add test/eventfd-disable.c test case
This new test checks if the mechanism to enable/disable notifications
through eventfd when a request is completed works correctly.
Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
---
v1 -> v2:
- renamed io_uring_cq_eventfd_toggle()
---
.gitignore | 1 +
test/Makefile | 6 +-
test/eventfd-disable.c | 148 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 153 insertions(+), 2 deletions(-)
create mode 100644 test/eventfd-disable.c
diff --git a/.gitignore b/.gitignore
index 19c47d9..fee76e8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,6 +40,7 @@
/test/defer
/test/eeed8b54e0df-test
/test/eventfd
+/test/eventfd-disable
/test/eventfd-ring
/test/fadvise
/test/fallocate
diff --git a/test/Makefile b/test/Makefile
index 61825d1..7df550d 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -21,7 +21,8 @@ all_targets += poll poll-cancel ring-leak fsync io_uring_setup io_uring_register
file-update accept-reuse poll-v-poll fadvise madvise \
short-read openat2 probe shared-wq personality eventfd \
send_recv eventfd-ring across-fork sq-poll-kthread splice \
- lfs-openat lfs-openat-write iopoll d4ae271dfaae-test
+ lfs-openat lfs-openat-write iopoll d4ae271dfaae-test \
+ eventfd-disable
include ../Makefile.quiet
@@ -53,7 +54,8 @@ test_srcs := poll.c poll-cancel.c ring-leak.c fsync.c io_uring_setup.c \
file-update.c accept-reuse.c poll-v-poll.c fadvise.c \
madvise.c short-read.c openat2.c probe.c shared-wq.c \
personality.c eventfd.c eventfd-ring.c across-fork.c sq-poll-kthread.c \
- splice.c lfs-openat.c lfs-openat-write.c iopoll.c d4ae271dfaae-test.c
+ splice.c lfs-openat.c lfs-openat-write.c iopoll.c d4ae271dfaae-test.c \
+ eventfd-disable.c
ifdef CONFIG_HAVE_STATX
test_srcs += statx.c
diff --git a/test/eventfd-disable.c b/test/eventfd-disable.c
new file mode 100644
index 0000000..ad086d4
--- /dev/null
+++ b/test/eventfd-disable.c
@@ -0,0 +1,148 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: test disable/enable notifications through eventfd
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/poll.h>
+#include <sys/eventfd.h>
+
+#include "liburing.h"
+
+int main(int argc, char *argv[])
+{
+ struct io_uring_params p = {};
+ struct io_uring_sqe *sqe;
+ struct io_uring_cqe *cqe;
+ struct io_uring ring;
+ uint64_t ptr;
+ struct iovec vec = {
+ .iov_base = &ptr,
+ .iov_len = sizeof(ptr)
+ };
+ int ret, evfd, i;
+
+ ret = io_uring_queue_init_params(64, &ring, &p);
+ if (ret) {
+ fprintf(stderr, "ring setup failed: %d\n", ret);
+ return 1;
+ }
+
+ evfd = eventfd(0, EFD_CLOEXEC);
+ if (evfd < 0) {
+ perror("eventfd");
+ return 1;
+ }
+
+ ret = io_uring_register_eventfd(&ring, evfd);
+ if (ret) {
+ fprintf(stderr, "failed to register evfd: %d\n", ret);
+ return 1;
+ }
+
+ if (!io_uring_cq_eventfd_enabled(&ring)) {
+ fprintf(stderr, "eventfd disabled\n");
+ return 1;
+ }
+
+ ret = io_uring_cq_eventfd_toggle(&ring, false);
+ if (ret) {
+ fprintf(stdout, "Skipping, CQ flags not available!\n");
+ return 0;
+ }
+
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_readv(sqe, evfd, &vec, 1, 0);
+ sqe->user_data = 1;
+
+ ret = io_uring_submit(&ring);
+ if (ret != 1) {
+ fprintf(stderr, "submit: %d\n", ret);
+ return 1;
+ }
+
+ for (i = 0; i < 63; i++) {
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_nop(sqe);
+ sqe->user_data = 2;
+ }
+
+ ret = io_uring_submit(&ring);
+ if (ret != 63) {
+ fprintf(stderr, "submit: %d\n", ret);
+ return 1;
+ }
+
+ for (i = 0; i < 63; i++) {
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ if (ret) {
+ fprintf(stderr, "wait: %d\n", ret);
+ return 1;
+ }
+
+ switch (cqe->user_data) {
+ case 1: /* eventfd */
+ fprintf(stderr, "eventfd unexpected: %d\n", (int)ptr);
+ return 1;
+ case 2:
+ if (cqe->res) {
+ fprintf(stderr, "nop: %d\n", cqe->res);
+ return 1;
+ }
+ break;
+ }
+ io_uring_cqe_seen(&ring, cqe);
+ }
+
+ ret = io_uring_cq_eventfd_toggle(&ring, true);
+ if (ret) {
+ fprintf(stderr, "io_uring_cq_eventfd_toggle: %d\n", ret);
+ return 1;
+ }
+
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_nop(sqe);
+ sqe->user_data = 2;
+
+ ret = io_uring_submit(&ring);
+ if (ret != 1) {
+ fprintf(stderr, "submit: %d\n", ret);
+ return 1;
+ }
+
+ for (i = 0; i < 2; i++) {
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ if (ret) {
+ fprintf(stderr, "wait: %d\n", ret);
+ return 1;
+ }
+
+ switch (cqe->user_data) {
+ case 1: /* eventfd */
+ if (cqe->res != sizeof(ptr)) {
+ fprintf(stderr, "read res: %d\n", cqe->res);
+ return 1;
+ }
+
+ if (ptr != 1) {
+ fprintf(stderr, "eventfd: %d\n", (int)ptr);
+ return 1;
+ }
+ break;
+ case 2:
+ if (cqe->res) {
+ fprintf(stderr, "nop: %d\n", cqe->res);
+ return 1;
+ }
+ break;
+ }
+ io_uring_cqe_seen(&ring, cqe);
+ }
+
+ return 0;
+}
--
2.25.4
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