@@ -88,6 +88,7 @@ test_srcs := \
file-update.c \
file-verify.c \
fixed-buf-iter.c \
+ fixed-hugepage.c \
fixed-link.c \
fixed-reuse.c \
fpos.c \
new file mode 100644
@@ -0,0 +1,236 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Test fixed buffers consisting of hugepages.
+ */
+#include <stdio.h>
+#include <string.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <sys/mman.h>
+
+#include "liburing.h"
+#include "helpers.h"
+
+#define PAGE_SIZE 4096
+#define HUGEPAGE_SIZE (512 * PAGE_SIZE)
+#define NR_BUFS 1
+#define IN_FD "/dev/urandom"
+#define OUT_FD "/dev/zero"
+
+static int open_files(int *fd_in, int *fd_out)
+{
+ *fd_in = open(IN_FD, O_RDONLY, 0644);
+ if (*fd_in < 0) {
+ perror("open in");
+ return 1;
+ }
+
+ *fd_out = open(OUT_FD, O_RDWR, 0644);
+ if (*fd_out < 0) {
+ perror("open out");
+ return 1;
+ }
+
+ return 0;
+}
+
+static int mmap_hugebufs(struct iovec *iov, int nr_bufs, size_t buf_size)
+{
+ int i;
+
+ for (i = 0; i < nr_bufs; i++) {
+ void *base = NULL;
+
+ base = mmap(NULL, buf_size, PROT_READ | PROT_WRITE,
+ MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
+ if (!base || base == MAP_FAILED) {
+ fprintf(stderr, "Error in mmapping the %dth buffer", i);
+ return 1;
+ }
+
+ iov[i].iov_base = base;
+ iov[i].iov_len = buf_size;
+ memset(iov[i].iov_base, 0, buf_size);
+ }
+
+ return 0;
+}
+
+static int do_read(struct io_uring *ring, int fd, struct iovec *iov,
+ int nr_bufs, size_t buf_size)
+{
+ struct io_uring_sqe *sqe;
+ struct io_uring_cqe *cqe;
+ int i, ret;
+
+ for (i = 0; i < nr_bufs; i++) {
+ sqe = io_uring_get_sqe(ring);
+ if (!sqe) {
+ fprintf(stderr, "Could not get SQE.\n");
+ return 1;
+ }
+
+ io_uring_prep_read_fixed(sqe, fd, iov[i].iov_base, buf_size, 0, i);
+ io_uring_submit(ring);
+
+ ret = io_uring_wait_cqe(ring, &cqe);
+ if (ret < 0) {
+ fprintf(stderr, "Error waiting for completion: %s\n", strerror(-ret));
+ return 1;
+ }
+
+ if (cqe->res < 0) {
+ fprintf(stderr, "Error in async operation: %s\n", strerror(-cqe->res));
+ return 1;
+ }
+
+ io_uring_cqe_seen(ring, cqe);
+ }
+
+ return 0;
+}
+
+static int do_write(struct io_uring *ring, int fd, struct iovec *iov,
+ int nr_bufs, size_t buf_size)
+{
+ struct io_uring_sqe *sqe;
+ struct io_uring_cqe *cqe;
+ int i, ret;
+
+ for (i = 0; i < nr_bufs; i++) {
+ sqe = io_uring_get_sqe(ring);
+ if (!sqe) {
+ fprintf(stderr, "Could not get SQE.\n");
+ return 1;
+ }
+
+ io_uring_prep_write_fixed(sqe, fd, iov[i].iov_base, buf_size, 0, i);
+ io_uring_submit(ring);
+
+ ret = io_uring_wait_cqe(ring, &cqe);
+ if (ret < 0) {
+ fprintf(stderr, "Error waiting for completion: %s\n", strerror(-ret));
+ return 1;
+ }
+
+ if (cqe->res < 0) {
+ fprintf(stderr, "Error in async operation: %s\n", strerror(-cqe->res));
+ return 1;
+ }
+
+ io_uring_cqe_seen(ring, cqe);
+ }
+
+ return 0;
+}
+
+static int test_one_hugepage(struct io_uring *ring, int fd_in, int fd_out)
+{
+ struct iovec iov[NR_BUFS];
+ int ret;
+ size_t buf_size = HUGEPAGE_SIZE;
+
+ ret = mmap_hugebufs(iov, NR_BUFS, buf_size);
+ if (ret) {
+ fprintf(stderr, "Buffer allocating for one hugepage failed.");
+ return 1;
+ }
+
+ ret = io_uring_register_buffers(ring, iov, NR_BUFS);
+ if (ret) {
+ fprintf(stderr, "Error registering buffers for one hugepage test: %s", strerror(-ret));
+ return 1;
+ }
+
+ ret = do_read(ring, fd_in, iov, NR_BUFS, buf_size);
+ if (ret) {
+ fprintf(stderr, "One hugepage read test failed");
+ return ret;
+ }
+
+ ret = do_write(ring, fd_out, iov, NR_BUFS, buf_size);
+ if (ret) {
+ fprintf(stderr, "One hugepages write test failed");
+ return ret;
+ }
+
+ ret = io_uring_unregister_buffers(ring);
+ if (ret) {
+ fprintf(stderr, "Error unregistering buffers for one hugepage test: %s", strerror(-ret));
+ return 1;
+ }
+
+ return 0;
+}
+
+static int test_multi_hugepages(struct io_uring *ring, int fd_in, int fd_out)
+{
+ struct iovec iov[NR_BUFS];
+ int ret;
+ size_t buf_size = 4 * HUGEPAGE_SIZE;
+
+ ret = mmap_hugebufs(iov, NR_BUFS, buf_size);
+ if (ret) {
+ fprintf(stderr, "mmap multi hugepages failed.");
+ return 1;
+ }
+
+ ret = io_uring_register_buffers(ring, iov, NR_BUFS);
+ if (ret) {
+ fprintf(stderr, "Error registering buffers for multi hugepages test: %s", strerror(-ret));
+ return 1;
+ }
+
+ ret = do_read(ring, fd_in, iov, NR_BUFS, buf_size);
+ if (ret) {
+ fprintf(stderr, "multi hugepages read test failed");
+ return ret;
+ }
+
+ ret = do_write(ring, fd_out, iov, NR_BUFS, buf_size);
+ if (ret) {
+ fprintf(stderr, "multi hugepages write test failed");
+ return ret;
+ }
+
+ ret = io_uring_unregister_buffers(ring);
+ if (ret) {
+ fprintf(stderr, "Error unregistering buffers for multi hugepages test: %s", strerror(-ret));
+ return 1;
+ }
+
+ return 0;
+}
+
+int main(int argc, char *argv[])
+{
+ struct io_uring ring;
+ int ret, fd_in, fd_out;
+
+ if (argc > 1)
+ return T_EXIT_SKIP;
+
+ if (open_files(&fd_in, &fd_out))
+ return T_EXIT_FAIL;
+
+ ret = t_create_ring(8, &ring, 0);
+ if (ret == T_SETUP_SKIP)
+ return T_EXIT_SKIP;
+ else if (ret < 0)
+ return T_EXIT_FAIL;
+
+ ret = test_one_hugepage(&ring, fd_in, fd_out);
+ if (ret) {
+ fprintf(stderr, "Test one hugepage failed");
+ return T_EXIT_FAIL;
+ }
+
+ ret = test_multi_hugepages(&ring, fd_in, fd_out);
+ if (ret) {
+ fprintf(stderr, "Test multi hugepages failed");
+ return T_EXIT_FAIL;
+ }
+
+ io_uring_queue_exit(&ring);
+ return T_EXIT_PASS;
+}
Add a test file for hugepage registered buffers, to make sure the fixed buffer coalescing feature works safe and soundly. Testcases include reading/writing with single/multiple hugepage buffers. Signed-off-by: Chenliang Li <cliang01.li@samsung.com> --- test/Makefile | 1 + test/fixed-hugepage.c | 236 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 237 insertions(+) create mode 100644 test/fixed-hugepage.c base-commit: 23b43f44f882e48a725ad87f8f22722c40743dec