Tests success (fifo, char dev), EEXISTS, ENOENT (no parent dir).
Signed-off-by: Dmitry Kadashev <dkadashev@xxxxxxxxx>
---
.gitignore | 1 +
test/Makefile | 2 +
test/mknod.c | 155 ++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 158 insertions(+)
create mode 100644 test/mknod.c
diff --git a/.gitignore b/.gitignore
index 7a6f75c..93cc1ea 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,6 +70,7 @@
/test/link_drain
/test/madvise
/test/mkdir
+/test/mknod
/test/nop
/test/nop-all-sizes
/test/open-close
diff --git a/test/Makefile b/test/Makefile
index 2f0a694..fbc6c0f 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -67,6 +67,7 @@ test_targets += \
link_drain \
madvise \
mkdir \
+ mknod \
multicqes_drain \
nop \
nop-all-sizes \
@@ -207,6 +208,7 @@ test_srcs := \
link_drain.c \
madvise.c \
mkdir.c \
+ mknod.c \
multicqes_drain.c \
nop-all-sizes.c \
nop.c \
diff --git a/test/mknod.c b/test/mknod.c
new file mode 100644
index 0000000..d82e243
--- /dev/null
+++ b/test/mknod.c
@@ -0,0 +1,155 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Description: test io_uring mknodat handling
+ */
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "liburing.h"
+
+static int do_mknodat(struct io_uring *ring, const char *fn, mode_t mode, dev_t dev)
+{
+ int ret;
+ struct io_uring_sqe *sqe;
+ struct io_uring_cqe *cqe;
+
+ sqe = io_uring_get_sqe(ring);
+ if (!sqe) {
+ fprintf(stderr, "sqe get failed\n");
+ goto err;
+ }
+ io_uring_prep_mknodat(sqe, AT_FDCWD, fn, mode, dev);
+
+ ret = io_uring_submit(ring);
+ if (ret != 1) {
+ fprintf(stderr, "submit failed: %d\n", ret);
+ goto err;
+ }
+
+ ret = io_uring_wait_cqes(ring, &cqe, 1, 0, 0);
+ if (ret) {
+ fprintf(stderr, "wait_cqe failed: %d\n", ret);
+ goto err;
+ }
+ ret = cqe->res;
+ io_uring_cqe_seen(ring, cqe);
+ return ret;
+err:
+ return 1;
+}
+
+int check_fifo(const char* fn)
+{
+ char buf[4];
+ int fd = open(fn, O_RDWR);
+ if (fd < 0) {
+ fprintf(stderr, "failed to open fifo: %s\n", strerror(errno));
+ return 1;
+ }
+ if (write(fd, "42", 2) != 2) {
+ fprintf(stderr, "short write to fifo\n");
+ return 1;
+ }
+ if (read(fd, buf, 2) != 2) {
+ fprintf(stderr, "short read from fifo\n");
+ return 1;
+ }
+ buf[3] = 0;
+ if (strncmp(buf, "42", 2)) {
+ fprintf(stderr, "read unexpected data from fifo: %s\n", buf);
+ return 1;
+ }
+
+ return 0;
+}
+
+int test_device(struct io_uring *ring, const char* fn)
+{
+ // 1, 3 is /dev/null
+ struct stat sb;
+ dev_t dev = makedev(1, 3);
+ int ret = do_mknodat(ring, fn, 0600 | S_IFCHR, dev);
+ if (ret < 0) {
+ fprintf(stderr, "mknodat device: %s\n", strerror(-ret));
+ return ret;
+ } else if (ret) {
+ return ret;
+ }
+ ret = stat(fn, &sb);
+ if (ret) {
+ perror("stat");
+ return ret;
+ }
+ if (sb.st_rdev != dev) {
+ fprintf(stderr, "unexpected device number: %d, %d\n",
+ major(sb.st_rdev), minor(sb.st_rdev));
+ return 1;
+ }
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ static const char fn[] = "io_uring-mknodat-test";
+ int ret;
+ struct io_uring ring;
+
+ ret = io_uring_queue_init(8, &ring, 0);
+ if (ret) {
+ fprintf(stderr, "queue init failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = do_mknodat(&ring, fn, 0600 | S_IFIFO, 0);
+ if (ret < 0) {
+ if (ret == -EBADF || ret == -EINVAL) {
+ fprintf(stdout, "mknodat not supported, skipping\n");
+ goto out;
+ }
+ fprintf(stderr, "mknodat: %s\n", strerror(-ret));
+ goto err;
+ } else if (ret) {
+ goto err;
+ }
+
+
+ if (check_fifo(fn))
+ goto err1;
+
+ ret = do_mknodat(&ring, fn, 0600 | S_IFIFO, 0);
+ if (ret != -EEXIST) {
+ fprintf(stderr, "do_mknodat already exists failed: %d\n", ret);
+ goto err1;
+ }
+
+ ret = do_mknodat(&ring, "surely/this/wont/exist", 0600 | S_IFIFO, 0);
+ if (ret != -ENOENT) {
+ fprintf(stderr, "do_mkdirat no parent failed: %d\n", ret);
+ goto err1;
+ }
+
+ unlinkat(AT_FDCWD, fn, 0);
+
+ if (!geteuid()) {
+ if (test_device(&ring, fn))
+ goto err1;
+ }
+ else
+ fprintf(stdout, "skipping the device test which needs root perms\n");
+
+out:
+ unlinkat(AT_FDCWD, fn, 0);
+ io_uring_queue_exit(&ring);
+ return 0;
+err1:
+ unlinkat(AT_FDCWD, fn, 0);
+err:
+ io_uring_queue_exit(&ring);
+ return 1;
+}
+
--
2.30.2
