Test rsrc tagging, updates, new registration opcodes for buffers and
files.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
Not final but working, just for reference.
test/Makefile | 2 +
test/rsrc_tags.c | 335 +++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 337 insertions(+)
create mode 100644 test/rsrc_tags.c
diff --git a/test/Makefile b/test/Makefile
index 4572564..f62e4f3 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -114,6 +114,7 @@ test_targets += \
unlink \
wakeup-hang \
sendmsg_fs_cve \
+ rsrc_tags \
# EOL
all_targets += $(test_targets)
@@ -251,6 +252,7 @@ test_srcs := \
unlink.c \
wakeup-hang.c \
sendmsg_fs_cve.c \
+ rsrc_tags.c \
# EOL
test_objs := $(patsubst %.c,%.ol,$(patsubst %.cc,%.ol,$(test_srcs)))
diff --git a/test/rsrc_tags.c b/test/rsrc_tags.c
new file mode 100644
index 0000000..1fd2628
--- /dev/null
+++ b/test/rsrc_tags.c
@@ -0,0 +1,335 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: run various file registration tests
+ *
+ */
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <assert.h>
+
+#include "../src/syscall.h"
+#include "helpers.h"
+#include "liburing.h"
+
+static int pipes[2];
+
+struct io_uring_rsrc_update2 {
+ __u32 offset;
+ __u32 resv;
+ __aligned_u64 data;
+ __aligned_u64 tags;
+ __u32 type;
+ __u32 nr;
+};
+
+struct io_uring_rsrc_register {
+ __u32 type;
+ __u32 nr;
+ __aligned_u64 data;
+ __aligned_u64 tags;
+};
+
+enum {
+ IORING_RSRC_FILE = 0,
+ IORING_RSRC_BUFFER = 1,
+};
+
+enum {
+ IORING_REGISTER_RSRC = 13,
+ IORING_REGISTER_RSRC_UPDATE = 14,
+};
+
+static bool check_cq_empty(struct io_uring *ring)
+{
+ struct io_uring_cqe *cqe = NULL;
+ int ret;
+
+ sleep(1); /* doesn't happen immediately, so wait */
+ ret = io_uring_peek_cqe(ring, &cqe); /* nothing should be there */
+ return ret == -EAGAIN;
+}
+
+static int register_rsrc(struct io_uring *ring, int type, int nr,
+ const void *arg, const __u64 *tags)
+{
+ struct io_uring_rsrc_register reg;
+ int ret;
+
+ memset(®, 0, sizeof(reg));
+ reg.type = type;
+ reg.nr = nr;
+ reg.data = (__u64)arg;
+ reg.tags = (__u64)tags;
+
+ ret = __sys_io_uring_register(ring->ring_fd, IORING_REGISTER_RSRC,
+ ®, sizeof(reg));
+ return ret ? -errno : 0;
+}
+
+static int update_rsrc(struct io_uring *ring, int type, int nr, int off,
+ const void *arg, const __u64 *tags)
+{
+ struct io_uring_rsrc_update2 up;
+ int ret;
+
+ memset(&up, 0, sizeof(up));
+ up.offset = off;
+ up.data = (__u64)arg;
+ up.tags = (__u64)tags;
+ up.type = type;
+ up.nr = nr;
+
+ ret = __sys_io_uring_register(ring->ring_fd, IORING_REGISTER_RSRC_UPDATE,
+ &up, sizeof(up));
+ return ret < 0 ? -errno : ret;
+}
+
+static int test_tags_generic(int nr, int type, void *rsrc, int ring_flags)
+{
+ struct io_uring_cqe *cqe = NULL;
+ struct io_uring ring;
+ int i, ret;
+ __u64 *tags;
+
+ tags = malloc(nr * sizeof(*tags));
+ if (!tags)
+ return 1;
+ for (i = 0; i < nr; i++)
+ tags[i] = i + 1;
+ ret = io_uring_queue_init(1, &ring, 0);
+ if (ret) {
+ printf("ring setup failed\n");
+ return 1;
+ }
+
+ ret = register_rsrc(&ring, type, nr, rsrc, tags);
+ if (ret) {
+ fprintf(stderr, "rsrc register failed %i\n", ret);
+ return 1;
+ }
+
+ /* test that tags are set */
+ tags[0] = 666;
+ ret = update_rsrc(&ring, type, 1, 0, rsrc, &tags[0]);
+ assert(ret == 1);
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ assert(!ret && cqe->user_data == 1);
+ io_uring_cqe_seen(&ring, cqe);
+
+ /* test that tags are updated */
+ tags[0] = 0;
+ ret = update_rsrc(&ring, type, 1, 0, rsrc, &tags[0]);
+ assert(ret == 1);
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ assert(!ret && cqe->user_data == 666);
+ io_uring_cqe_seen(&ring, cqe);
+
+ /* test tag=0 doesn't emit CQE */
+ tags[0] = 1;
+ ret = update_rsrc(&ring, type, 1, 0, rsrc, &tags[0]);
+ assert(ret == 1);
+ assert(check_cq_empty(&ring));
+
+ free(tags);
+ io_uring_queue_exit(&ring);
+ return 0;
+}
+
+static int test_buffers_update(void)
+{
+ struct io_uring_sqe *sqe;
+ struct io_uring_cqe *cqe = NULL;
+ struct io_uring ring;
+ const int nr = 5;
+ int buf_idx = 1, i, ret;
+ int pipes[2];
+ char tmp_buf[1024];
+ char tmp_buf2[1024];
+ struct iovec vecs[nr];
+ __u64 tags[nr];
+
+ for (i = 0; i < nr; i++) {
+ vecs[i].iov_base = tmp_buf;
+ vecs[i].iov_len = 1024;
+ tags[i] = i + 1;
+ }
+
+ ret = test_tags_generic(nr, IORING_RSRC_BUFFER, vecs, 0);
+ if (ret)
+ return 1;
+
+ ret = io_uring_queue_init(1, &ring, 0);
+ if (ret) {
+ printf("ring setup failed\n");
+ return 1;
+ }
+ if (pipe(pipes) < 0) {
+ perror("pipe");
+ return 1;
+ }
+ ret = register_rsrc(&ring, IORING_RSRC_BUFFER, nr, vecs, tags);
+ if (ret) {
+ fprintf(stderr, "rsrc register failed %i\n", ret);
+ return 1;
+ }
+
+ /* test that CQE is not emmited before we're done with a buffer */
+ sqe = io_uring_get_sqe(&ring);
+ io_uring_prep_read_fixed(sqe, pipes[0], tmp_buf, 10, 0, 0);
+ sqe->user_data = 100;
+ ret = io_uring_submit(&ring);
+ if (ret != 1) {
+ fprintf(stderr, "%s: got %d, wanted 1\n", __FUNCTION__, ret);
+ return 1;
+ }
+ ret = io_uring_peek_cqe(&ring, &cqe);
+ assert(ret == -EAGAIN);
+
+ vecs[buf_idx].iov_base = tmp_buf2;
+ ret = update_rsrc(&ring, IORING_RSRC_BUFFER, 1, buf_idx,
+ &vecs[buf_idx], &tags[buf_idx]);
+ if (ret != 1) {
+ fprintf(stderr, "rsrc update failed %i %i\n", ret, errno);
+ return 1;
+ }
+
+ ret = io_uring_peek_cqe(&ring, &cqe); /* nothing should be there */
+ assert(ret == -EAGAIN);
+ close(pipes[0]);
+ close(pipes[1]);
+
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ assert(!ret && cqe->user_data == 100);
+ io_uring_cqe_seen(&ring, cqe);
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ assert(!ret && cqe->user_data == buf_idx + 1);
+ io_uring_cqe_seen(&ring, cqe);
+
+ io_uring_queue_exit(&ring);
+ return 0;
+}
+
+static int test_files(int ring_flags)
+{
+ struct io_uring_cqe *cqe = NULL;
+ struct io_uring ring;
+ const int nr = 50;
+ int off = 5, i, ret, fd;
+ int files[nr];
+ __u64 tags[nr], tag;
+
+ for (i = 0; i < nr; ++i) {
+ files[i] = pipes[0];
+ tags[i] = i + 1;
+ }
+
+ ret = test_tags_generic(nr, IORING_RSRC_FILE, files, ring_flags);
+ if (ret)
+ return 1;
+
+ ret = io_uring_queue_init(1, &ring, ring_flags);
+ if (ret) {
+ printf("ring setup failed\n");
+ return 1;
+ }
+ ret = register_rsrc(&ring, IORING_RSRC_FILE, nr, files, tags);
+ if (ret) {
+ fprintf(stderr, "rsrc register failed %i\n", ret);
+ return 1;
+ }
+
+ /* check update did update tag */
+ fd = -1;
+ ret = io_uring_register_files_update(&ring, off, &fd, 1);
+ assert(ret == 1);
+ ret = io_uring_wait_cqe(&ring, &cqe);
+ assert(!ret && cqe->user_data == tags[off]);
+ io_uring_cqe_seen(&ring, cqe);
+
+ /* remove removed file, shouldn't emit old tag */
+ ret = io_uring_register_files_update(&ring, off, &fd, 1);
+ assert(ret <= 1);
+ assert(check_cq_empty(&ring));
+
+ /* non-zero tag with remove update is disallowed */
+ tag = 1;
+ fd = -1;
+ ret = update_rsrc(&ring, IORING_RSRC_FILE, 1, off + 1, &fd, &tag);
+ assert(ret);
+
+ io_uring_queue_exit(&ring);
+ return 0;
+}
+
+static int test_notag(void)
+{
+ struct io_uring_cqe *cqe = NULL;
+ struct io_uring ring;
+ int i, ret, fd;
+ const int nr = 50;
+ int files[nr];
+
+ ret = io_uring_queue_init(1, &ring, 0);
+ if (ret) {
+ printf("ring setup failed\n");
+ return 1;
+ }
+ for (i = 0; i < nr; ++i)
+ files[i] = pipes[0];
+
+ ret = io_uring_register_files(&ring, files, nr);
+ assert(!ret);
+
+ /* default register, update shouldn't emit CQE */
+ fd = -1;
+ ret = io_uring_register_files_update(&ring, 0, &fd, 1);
+ assert(ret == 1);
+ assert(check_cq_empty(&ring));
+
+ ret = io_uring_unregister_files(&ring);
+ assert(!ret);
+ ret = io_uring_peek_cqe(&ring, &cqe); /* nothing should be there */
+ assert(ret);
+
+ io_uring_queue_exit(&ring);
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ int ring_flags[] = {0, IORING_SETUP_IOPOLL};
+ int i, ret;
+
+ if (argc > 1)
+ return 0;
+ if (pipe(pipes) < 0) {
+ perror("pipe");
+ return 1;
+ }
+
+ ret = test_notag();
+ if (ret) {
+ printf("test_notag failed\n");
+ return ret;
+ }
+
+ for (i = 0; i < sizeof(ring_flags) / sizeof(ring_flags[0]); i++) {
+ ret = test_files(ring_flags[i]);
+ if (ret) {
+ printf("test_tag failed, type %i\n", i);
+ return ret;
+ }
+ }
+
+ ret = test_buffers_update();
+ if (ret) {
+ printf("test_buffers_update failed\n");
+ return ret;
+ }
+
+ return 0;
+}
--
2.31.1
