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Mon, 26 May 2025 00:35:11 -0700 (PDT) Received: from 127.0.0.1localhost ([148.252.132.24]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ad52d43840esm1622780266b.87.2025.05.26.00.35.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 May 2025 00:35:10 -0700 (PDT) From: Pavel Begunkov To: io-uring@vger.kernel.org Cc: asml.silence@gmail.com Subject: [PATCH liburing 1/2] tests: test cmd regvec support with mock file Date: Mon, 26 May 2025 08:36:17 +0100 Message-ID: <8398c230325218a4b9ac3d2d9dab2cbe6ecadde3.1748244826.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Tests io_uring cmds with vectored registered buffers, which relies on io_uring mock files.t Signed-off-by: Pavel Begunkov --- test/Makefile | 1 + test/mock.h | 47 +++++++++ test/mock_tests.c | 260 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 308 insertions(+) create mode 100644 test/mock.h create mode 100644 test/mock_tests.c diff --git a/test/Makefile b/test/Makefile index a0542dcb..e4309edc 100644 --- a/test/Makefile +++ b/test/Makefile @@ -245,6 +245,7 @@ test_srcs := \ xattr.c \ zcrx.c \ vec-regbuf.c \ + mock_tests.c \ # EOL # Please keep this list sorted alphabetically. diff --git a/test/mock.h b/test/mock.h new file mode 100644 index 00000000..7fa71145 --- /dev/null +++ b/test/mock.h @@ -0,0 +1,47 @@ +#ifndef IOU_MOCK_H +#define IOU_MOCK_H + +#include + +enum { + IORING_MOCK_FEAT_CMD_COPY, + IORING_MOCK_FEAT_RW_ZERO, + IORING_MOCK_FEAT_RW_NOWAIT, + IORING_MOCK_FEAT_RW_ASYNC, + IORING_MOCK_FEAT_POLL, + + IORING_MOCK_FEAT_END, +}; + +struct io_uring_mock_probe { + __u64 features; + __u64 __resv[9]; +}; + +enum { + IORING_MOCK_CREATE_F_SUPPORT_NOWAIT = 1, + IORING_MOCK_CREATE_F_POLL = 2, +}; + +struct io_uring_mock_create { + __u32 out_fd; + __u32 flags; + __u64 file_size; + __u64 rw_delay_ns; + __u64 __resv[13]; +}; + +enum { + IORING_MOCK_MGR_CMD_PROBE, + IORING_MOCK_MGR_CMD_CREATE, +}; + +enum { + IORING_MOCK_CMD_COPY_REGBUF, +}; + +enum { + IORING_MOCK_COPY_FROM = 1, +}; + +#endif \ No newline at end of file diff --git a/test/mock_tests.c b/test/mock_tests.c new file mode 100644 index 00000000..5f3063ff --- /dev/null +++ b/test/mock_tests.c @@ -0,0 +1,260 @@ +#include +#include +#include +#include +#include +#include +#include +#include + +#include "liburing.h" +#include "test.h" +#include "helpers.h" + +#include "mock.h" + +static struct io_uring mgr_ring; +static __u64 mock_features; +static int mgr_fd; + +static int setup_mgr(void) +{ + struct io_uring_mock_probe mp; + struct io_uring_cqe *cqe; + struct io_uring_sqe *sqe; + int ret; + + ret = mgr_fd = open("/dev/io_uring_mock", O_RDWR); + if (mgr_fd < 0) { + printf("no io_uring mock files, skip\n"); + return T_EXIT_SKIP; + } + + ret = io_uring_queue_init(8, &mgr_ring, 0); + if (ret) { + fprintf(stderr, "mgr ring setup failed %i\n", ret); + return T_EXIT_FAIL; + } + + memset(&mp, 0, sizeof(mp)); + sqe = io_uring_get_sqe(&mgr_ring); + t_sqe_prep_cmd(sqe, mgr_fd, IORING_MOCK_MGR_CMD_PROBE); + sqe->addr = (__u64)(unsigned long)∓ + sqe->len = sizeof(mp); + + ret = t_submit_and_wait_single(&mgr_ring, &cqe); + if (ret || cqe->res) { + fprintf(stderr, "probe cmd failed %i %i\n", ret, cqe->res); + return T_EXIT_FAIL; + } + + io_uring_cqe_seen(&mgr_ring, cqe); + mock_features = mp.features; + return 0; +} + +static int create_mock_file(struct io_uring_mock_create *mc) +{ + struct io_uring_cqe *cqe; + struct io_uring_sqe *sqe; + int ret; + + sqe = io_uring_get_sqe(&mgr_ring); + t_sqe_prep_cmd(sqe, mgr_fd, IORING_MOCK_MGR_CMD_CREATE); + sqe->addr = (__u64)(unsigned long)mc; + sqe->len = sizeof(*mc); + + ret = t_submit_and_wait_single(&mgr_ring, &cqe); + if (ret || cqe->res) { + fprintf(stderr, "file create cmd failed %i %i\n", ret, cqe->res); + return T_EXIT_FAIL; + } + io_uring_cqe_seen(&mgr_ring, cqe); + return 0; +} + +static int t_copy_regvec(struct io_uring *ring, int mock_fd, + struct iovec *iov, unsigned iov_len, char *buf, + bool from_iov) +{ + struct io_uring_cqe *cqe; + struct io_uring_sqe *sqe; + int ret; + + sqe = io_uring_get_sqe(ring); + t_sqe_prep_cmd(sqe, mock_fd, IORING_MOCK_CMD_COPY_REGBUF); + sqe->addr3 = (__u64)(unsigned long)buf; + sqe->addr = (__u64)(unsigned long)iov; + sqe->len = iov_len; + if (from_iov) + sqe->file_index = IORING_MOCK_COPY_FROM; + sqe->buf_index = from_iov ? 0 : 1; + sqe->user_data = 43; + sqe->uring_cmd_flags |= IORING_URING_CMD_FIXED; + + ret = t_submit_and_wait_single(ring, &cqe); + if (ret) + t_error(1, ret, "submit/wait failed"); + + ret = cqe->res; + io_uring_cqe_seen(ring, cqe); + return ret; +} + +static int t_copy_verify_regvec(struct io_uring *ring, int mock_fd, + struct iovec *iov, unsigned iov_len, char *buf, + bool from_iov) +{ + struct iovec iov2; + int ret; + + ret = t_copy_regvec(ring, mock_fd, iov, iov_len, buf, from_iov); + if (ret < 0 || ret != t_iovec_data_length(iov, iov_len)) + return ret < 0 ? ret : -1; + + iov2.iov_base = buf; + iov2.iov_len = -1U; + + ret = t_compare_data_iovec(iov, iov_len, &iov2, 1); + if (ret) { + fprintf(stderr, "iovec1 data mismatch %i\n", ret); + return -1; + } + return 0; +} + +static int test_regvec_cmd(struct io_uring *ring, int mock_fd) +{ + struct iovec buf_iovec[2]; + struct iovec iov[8]; + size_t size = 4096 * 32; + char *buf_src, *buf_dst; + int i, ret; + + buf_src = aligned_alloc(4096, size); + buf_dst = aligned_alloc(4096, size); + if (!buf_src || !buf_dst) + t_error(0, -ENOMEM, "can't allocate buffers"); + + for (i = 0; i < size; i++) + buf_src[i] = 'a' + (i % 26); + + buf_iovec[0].iov_base = buf_src; + buf_iovec[0].iov_len = size; + buf_iovec[1].iov_base = buf_dst; + buf_iovec[1].iov_len = size; + ret = t_register_buffers(ring, buf_iovec, 2); + if (ret) { + free(buf_src); + free(buf_dst); + return ret == T_SETUP_SKIP ? 0 : T_EXIT_FAIL; + } + + memset(buf_dst, 0, size); + iov[0].iov_len = size; + iov[0].iov_base = buf_src; + ret = t_copy_verify_regvec(ring, mock_fd, iov, 1, buf_dst, true); + if (ret < 0) { + fprintf(stderr, "t_copy_verify_regvec iovec1 failed %i\n", ret); + return T_EXIT_FAIL; + } + + memset(buf_dst, 0, size); + iov[0].iov_len = size; + iov[0].iov_base = buf_dst; + ret = t_copy_verify_regvec(ring, mock_fd, iov, 1, buf_src, false); + if (ret < 0) { + fprintf(stderr, "t_copy_verify_regvec iovec1 reverse failed %i\n", ret); + return T_EXIT_FAIL; + } + + memset(buf_dst, 0, size); + iov[0].iov_base = buf_src; + iov[0].iov_len = 5; + iov[1].iov_base = buf_src + 5; + iov[1].iov_len = 11; + iov[2].iov_base = buf_src + (4096 - 127); + iov[2].iov_len = 127; + iov[3].iov_base = buf_src + (4096 - 127); + iov[3].iov_len = 127 + 4096 + 13; + iov[4].iov_base = buf_src + 4 * 4096; + iov[4].iov_len = 4096 + 73; + iov[5].iov_base = buf_src + 7 * 4096 + 127; + iov[5].iov_len = 4096 * 11 + 132; + assert(t_iovec_data_length(iov, 6) <= size); + ret = t_copy_verify_regvec(ring, mock_fd, iov, 6, buf_dst, true); + if (ret < 0) { + fprintf(stderr, "t_copy_verify_regvec iovec6 failed %i\n", ret); + return T_EXIT_FAIL; + } + + memset(buf_dst, 0, size); + iov[0].iov_base = buf_dst; + iov[0].iov_len = 5; + iov[1].iov_base = buf_dst + 5; + iov[1].iov_len = 11; + iov[2].iov_base = buf_dst + (4096 - 127); + iov[2].iov_len = 127; + iov[3].iov_base = buf_dst + 4 * 4096; + iov[3].iov_len = 4096 + 73; + iov[4].iov_base = buf_dst + 7 * 4096 + 127; + iov[4].iov_len = 4096 * 11 + 132; + assert(t_iovec_data_length(iov, 5) <= size); + ret = t_copy_verify_regvec(ring, mock_fd, iov, 5, buf_src, false); + if (ret < 0) { + fprintf(stderr, "t_copy_verify_regvec iovec6 reverse failed %i\n", ret); + return T_EXIT_FAIL; + } + + free(buf_src); + free(buf_dst); + return 0; +} + +static int test_cmds(void) +{ + struct io_uring_mock_create mc; + struct io_uring ring; + int ret, mock_fd; + + memset(&mc, 0, sizeof(mc)); + if (create_mock_file(&mc)) + return T_EXIT_FAIL; + mock_fd = mc.out_fd; + + ret = io_uring_queue_init(8, &ring, 0); + if (ret) { + fprintf(stderr, "ring setup failed: %d\n", ret); + return 1; + } + + if (IORING_MOCK_FEAT_CMD_COPY < mock_features) { + ret = test_regvec_cmd(&ring, mock_fd); + if (ret) { + fprintf(stderr, "test_regvec_cmd() failed\n"); + return T_EXIT_FAIL; + } + } else { + printf("skip test_regvec_cmd()\n"); + } + + io_uring_queue_exit(&ring); + return 0; +} + +int main(int argc, char *argv[]) +{ + int ret; + + ret = setup_mgr(); + if (ret) + return ret; + + ret = test_cmds(); + if (ret) + return T_EXIT_FAIL; + + io_uring_queue_exit(&mgr_ring); + close(mgr_fd); + return 0; +} -- 2.49.0