* [RFC][PATCH liburing] tests: test CQE skipping
@ 2021-09-11 13:58 Pavel Begunkov
0 siblings, 0 replies; only message in thread
From: Pavel Begunkov @ 2021-09-11 13:58 UTC (permalink / raw)
To: Jens Axboe, io-uring
Test IOSQE_CQE_SKIP_SUCCESS allowing to ingore CQE posting.
Signed-off-by: Pavel Begunkov <[email protected]>
---
.gitignore | 1 +
test/Makefile | 2 +
test/skip-cqe.c | 336 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 339 insertions(+)
create mode 100644 test/skip-cqe.c
diff --git a/.gitignore b/.gitignore
index 0213bfa..5fa71bc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -130,6 +130,7 @@
/test/testfile
/test/submit-link-fail
/test/exec-target
+/test/skip-cqe
/test/*.dmesg
config-host.h
diff --git a/test/Makefile b/test/Makefile
index 54ee730..1f78ad6 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -136,6 +136,7 @@ test_targets += \
sendmsg_fs_cve \
rsrc_tags \
exec-target \
+ skip-cqe \
# EOL
all_targets += $(test_targets)
@@ -278,6 +279,7 @@ test_srcs := \
sendmsg_fs_cve.c \
rsrc_tags.c \
exec-target.c \
+ skip-cqe.c \
# EOL
test_objs := $(patsubst %.c,%.ol,$(patsubst %.cc,%.ol,$(test_srcs)))
diff --git a/test/skip-cqe.c b/test/skip-cqe.c
new file mode 100644
index 0000000..3be55ca
--- /dev/null
+++ b/test/skip-cqe.c
@@ -0,0 +1,336 @@
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
+#include "liburing.h"
+
+#ifndef IOSQE_CQE_SKIP_SUCCESS
+#define IOSQE_CQE_SKIP_SUCCESS (1U << 6)
+#endif
+#define LINK_SIZE 6
+#define TIMEOUT_USER_DATA (-1)
+
+static int fds[2];
+
+/* should be successfully submitted but fails during execution */
+static void prep_exec_fail_req(struct io_uring_sqe *sqe)
+{
+ io_uring_prep_write(sqe, fds[2], NULL, 100, 0);
+}
+
+static int test_link_success(struct io_uring *ring, int nr, bool skip_last)
+{
+ struct io_uring_cqe *cqe;
+ struct io_uring_sqe *sqe;
+ int ret, i;
+
+ for (i = 0; i < nr; ++i) {
+ sqe = io_uring_get_sqe(ring);
+ io_uring_prep_nop(sqe);
+ if (i != nr - 1 || skip_last)
+ sqe->flags |= IOSQE_IO_LINK | IOSQE_CQE_SKIP_SUCCESS;
+ sqe->user_data = i;
+ }
+
+ ret = io_uring_submit(ring);
+ if (ret != nr) {
+ fprintf(stderr, "sqe submit failed: %d\n", ret);
+ goto err;
+ }
+
+ if (!skip_last) {
+ ret = io_uring_wait_cqe(ring, &cqe);
+ if (ret != 0) {
+ fprintf(stderr, "wait completion %d\n", ret);
+ goto err;
+ }
+ if (cqe->res != 0) {
+ fprintf(stderr, "nop failed: res %d\n", cqe->res);
+ goto err;
+ }
+ if (cqe->user_data != nr - 1) {
+ fprintf(stderr, "invalid user_data %i\n", (int)cqe->user_data);
+ goto err;
+ }
+ io_uring_cqe_seen(ring, cqe);
+ }
+
+ if (io_uring_peek_cqe(ring, &cqe) >= 0) {
+ fprintf(stderr, "single CQE expected %i\n", (int)cqe->user_data);
+ goto err;
+ }
+ return 0;
+err:
+ return 1;
+}
+
+static int test_link_fail(struct io_uring *ring, int nr, int fail_idx)
+{
+ struct io_uring_cqe *cqe;
+ struct io_uring_sqe *sqe;
+ int ret, i;
+
+ for (i = 0; i < nr; ++i) {
+ sqe = io_uring_get_sqe(ring);
+ if (i == fail_idx)
+ prep_exec_fail_req(sqe);
+ else
+ io_uring_prep_nop(sqe);
+
+ if (i != nr - 1)
+ sqe->flags |= IOSQE_IO_LINK | IOSQE_CQE_SKIP_SUCCESS;
+ sqe->user_data = i;
+ }
+
+ ret = io_uring_submit(ring);
+ if (ret != nr) {
+ fprintf(stderr, "sqe submit failed: %d\n", ret);
+ goto err;
+ }
+ ret = io_uring_wait_cqe(ring, &cqe);
+ if (ret != 0) {
+ fprintf(stderr, "wait completion %d\n", ret);
+ goto err;
+ }
+ if (!cqe->res || cqe->user_data != fail_idx) {
+ fprintf(stderr, "got: user_data %d res %d, expected data: %d\n",
+ (int)cqe->user_data, cqe->res, fail_idx);
+ goto err;
+ }
+ io_uring_cqe_seen(ring, cqe);
+
+ if (io_uring_peek_cqe(ring, &cqe) >= 0) {
+ fprintf(stderr, "single CQE expected %i\n", (int)cqe->user_data);
+ goto err;
+ }
+ return 0;
+err:
+ return 1;
+}
+
+static int test_ltimeout_cancel(struct io_uring *ring, int nr, int tout_idx,
+ bool async, int fail_idx)
+{
+ struct __kernel_timespec ts = {.tv_sec = 1, .tv_nsec = 0};
+ struct io_uring_cqe *cqe;
+ struct io_uring_sqe *sqe;
+ int ret, i;
+ int e_res = 0, e_idx = nr - 1;
+
+ if (fail_idx >= 0) {
+ e_res = -EFAULT;
+ e_idx = fail_idx;
+ }
+
+ for (i = 0; i < nr; ++i) {
+ sqe = io_uring_get_sqe(ring);
+ if (i == fail_idx)
+ prep_exec_fail_req(sqe);
+ else
+ io_uring_prep_nop(sqe);
+ sqe->user_data = i;
+ sqe->flags |= IOSQE_IO_LINK;
+ if (async)
+ sqe->flags |= IOSQE_ASYNC;
+ if (i != nr - 1)
+ sqe->flags |= IOSQE_CQE_SKIP_SUCCESS;
+
+ if (i == tout_idx) {
+ sqe = io_uring_get_sqe(ring);
+ io_uring_prep_link_timeout(sqe, &ts, 0);
+ sqe->flags |= IOSQE_IO_LINK | IOSQE_CQE_SKIP_SUCCESS;
+ sqe->user_data = TIMEOUT_USER_DATA;
+ }
+ }
+
+ ret = io_uring_submit(ring);
+ if (ret != nr + 1) {
+ fprintf(stderr, "sqe submit failed: %d\n", ret);
+ goto err;
+ }
+ ret = io_uring_wait_cqe(ring, &cqe);
+ if (ret != 0) {
+ fprintf(stderr, "wait completion %d\n", ret);
+ goto err;
+ }
+ if (cqe->user_data != e_idx) {
+ fprintf(stderr, "invalid user_data %i\n", (int)cqe->user_data);
+ goto err;
+ }
+ if (cqe->res != e_res) {
+ fprintf(stderr, "unexpected res: %d\n", cqe->res);
+ goto err;
+ }
+ io_uring_cqe_seen(ring, cqe);
+
+ if (io_uring_peek_cqe(ring, &cqe) >= 0) {
+ fprintf(stderr, "single CQE expected %i\n", (int)cqe->user_data);
+ goto err;
+ }
+ return 0;
+err:
+ return 1;
+}
+
+static int test_ltimeout_fire(struct io_uring *ring, bool async,
+ bool skip_main, bool skip_tout)
+{
+ char buf[1];
+ struct __kernel_timespec ts = {.tv_sec = 0, .tv_nsec = 1000000};
+ struct io_uring_cqe *cqe;
+ struct io_uring_sqe *sqe;
+ int ret, i;
+ int nr = 1 + !skip_tout;
+
+ sqe = io_uring_get_sqe(ring);
+ io_uring_prep_read(sqe, fds[0], buf, sizeof(buf), 0);
+ sqe->flags |= IOSQE_IO_LINK;
+ sqe->flags |= async ? IOSQE_ASYNC : 0;
+ sqe->flags |= skip_main ? IOSQE_CQE_SKIP_SUCCESS : 0;
+ sqe->user_data = 0;
+
+ sqe = io_uring_get_sqe(ring);
+ io_uring_prep_link_timeout(sqe, &ts, 0);
+ sqe->flags |= skip_tout ? IOSQE_CQE_SKIP_SUCCESS : 0;
+ sqe->user_data = 1;
+
+ ret = io_uring_submit(ring);
+ if (ret != 2) {
+ fprintf(stderr, "sqe submit failed: %d\n", ret);
+ return 1;
+ }
+
+ for (i = 0; i < nr; i++) {
+ ret = io_uring_wait_cqe(ring, &cqe);
+ if (ret != 0) {
+ fprintf(stderr, "wait completion %d\n", ret);
+ return 1;
+ }
+ switch (cqe->user_data) {
+ case 0:
+ if (cqe->res != -ECANCELED && cqe->res != -EINTR) {
+ fprintf(stderr, "unexpected read return: %d\n", cqe->res);
+ return 1;
+ }
+ break;
+ case 1:
+ if (skip_tout) {
+ fprintf(stderr, "extra timeout cqe, %d\n", cqe->res);
+ return 1;
+ }
+ break;
+ }
+ io_uring_cqe_seen(ring, cqe);
+ }
+
+
+ if (io_uring_peek_cqe(ring, &cqe) >= 0) {
+ fprintf(stderr, "single CQE expected: got data: %i res: %i\n",
+ (int)cqe->user_data, cqe->res);
+ return 1;
+ }
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ struct io_uring ring;
+ int ret, i;
+ int mid_idx = LINK_SIZE / 2;
+ int last_idx = LINK_SIZE - 1;
+
+ if (pipe(fds)) {
+ fprintf(stderr, "pipe() failed\n");
+ return 1;
+ }
+ ret = io_uring_queue_init(16, &ring, 0);
+ if (ret) {
+ fprintf(stderr, "ring setup failed: %d\n", ret);
+ return 1;
+ }
+
+ for (i = 0; i < 4; i++) {
+ bool skip_last = i & 1;
+ int sz = (i & 2) ? LINK_SIZE : 1;
+
+ ret = test_link_success(&ring, sz, skip_last);
+ if (ret) {
+ fprintf(stderr, "test_link_success sz %d, %d last\n",
+ skip_last, sz);
+ return ret;
+ }
+ }
+
+ ret = test_link_fail(&ring, LINK_SIZE, mid_idx);
+ if (ret) {
+ fprintf(stderr, "test_link_fail mid failed\n");
+ return ret;
+ }
+
+ ret = test_link_fail(&ring, LINK_SIZE, last_idx);
+ if (ret) {
+ fprintf(stderr, "test_link_fail last failed\n");
+ return ret;
+ }
+
+ for (i = 0; i < 2; i++) {
+ bool async = i & 1;
+
+ ret = test_ltimeout_cancel(&ring, 1, 0, async, -1);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_cancel 1 failed, %i\n",
+ async);
+ return ret;
+ }
+ ret = test_ltimeout_cancel(&ring, LINK_SIZE, mid_idx, async, -1);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_cancel mid failed, %i\n",
+ async);
+ return ret;
+ }
+ ret = test_ltimeout_cancel(&ring, LINK_SIZE, last_idx, async, -1);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_cancel last failed, %i\n",
+ async);
+ return ret;
+ }
+ ret = test_ltimeout_cancel(&ring, LINK_SIZE, mid_idx, async, mid_idx);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_cancel fail mid failed, %i\n",
+ async);
+ return ret;
+ }
+ ret = test_ltimeout_cancel(&ring, LINK_SIZE, mid_idx, async, mid_idx - 1);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_cancel fail2 mid failed, %i\n",
+ async);
+ return ret;
+ }
+ ret = test_ltimeout_cancel(&ring, LINK_SIZE, mid_idx, async, mid_idx + 1);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_cancel fail3 mid failed, %i\n",
+ async);
+ return ret;
+ }
+ }
+
+ for (i = 0; i < 8; i++) {
+ bool async = i & 1;
+ bool skip1 = i & 2;
+ bool skip2 = i & 4;
+
+ ret = test_ltimeout_fire(&ring, async, skip1, skip2);
+ if (ret) {
+ fprintf(stderr, "test_ltimeout_fire failed\n");
+ return ret;
+ }
+ }
+
+ close(fds[0]);
+ close(fds[1]);
+ io_uring_queue_exit(&ring);
+ return 0;
+}
--
2.33.0
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