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Fri, 20 Mar 2026 12:47:44 +0000 (GMT) From: Sachin Sant To: ltp@lists.linux.it Date: Fri, 20 Mar 2026 18:17:40 +0530 Message-Id: <20260320124742.75946-2-sachinp@linux.ibm.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20260320124742.75946-1-sachinp@linux.ibm.com> References: <20260320124742.75946-1-sachinp@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=arO/yCZV c=1 sm=1 tr=0 ts=69bd41f3 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=DBcWgPPY1eiOcN69OxwA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIwMDEwMCBTYWx0ZWRfX6HKGmLzQY/mR HnRRZ1IbiP1tn2NGF43V8KZuqqxTZsvQ0dZ1qRDm42QzkaXfppTogrcQJuutKkmJcTn77YOXkpL ExwV4tvlVniGtpmZFcWe7eTw0tYyQ5Cb+EwWM6NsMCS8xp913f/0psPBQEe51btPI47W/LRdXU1 //pCUNprKIf3uM0P8e3aQ+t8LOlpN50+ZhWOrYgtr9+8OO+tCAZmb0CezH557TFjbXKEaDayiaq fOLjXOuxLVG8WYU2cMq8buP34lQf346zJvBogiY5Mht2IGdaukqLriKujfCCJViuog2wUry8OS8 wPq3vINCUdv2LIvweArcfHr77iWo3ULnou8NxJPB+LdAWk+W9/jPm/x64YXHhuVtFSI2LjS5805 ffABRHvUf7WDp0yTYceRNtINSroNudrRsmpX+hdFPPK05zjxt9EeYMZGpNpi7FEaLqQKyT5SuXc e0VctNAKNI3qscDdK0A== X-Proofpoint-GUID: dbh4kemqgwEkfd98ysCOcpBo-euq58lf X-Proofpoint-ORIG-GUID: dbh4kemqgwEkfd98ysCOcpBo-euq58lf X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-20_02,2026-03-19_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 lowpriorityscore=0 impostorscore=0 adultscore=0 bulkscore=0 suspectscore=0 malwarescore=0 clxscore=1015 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603200100 X-Virus-Scanned: clamav-milter 1.0.9 at in-5.smtp.seeweb.it X-Virus-Status: Clean Subject: [LTP] [PATCH 1/3] io_uring: Test IORING READ and WRITE operations X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" This test validates basic read and write operations using io_uring. It tests: 1. IORING_OP_WRITE - Writing data to a file 2. IORING_OP_READ - Reading data from a file 3. Data integrity verification This patch also introduces a header file for common functions. Signed-off-by: Sachin Sant --- runtest/syscalls | 1 + testcases/kernel/syscalls/io_uring/.gitignore | 1 + .../kernel/syscalls/io_uring/io_uring03.c | 130 +++++++++ .../syscalls/io_uring/io_uring_common.h | 265 ++++++++++++++++++ 4 files changed, 397 insertions(+) create mode 100644 testcases/kernel/syscalls/io_uring/io_uring03.c create mode 100644 testcases/kernel/syscalls/io_uring/io_uring_common.h diff --git a/runtest/syscalls b/runtest/syscalls index 2179e007c..7dc80fe29 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -1898,6 +1898,7 @@ membarrier01 membarrier01 io_uring01 io_uring01 io_uring02 io_uring02 +io_uring03 io_uring03 # Tests below may cause kernel memory leak perf_event_open03 perf_event_open03 diff --git a/testcases/kernel/syscalls/io_uring/.gitignore b/testcases/kernel/syscalls/io_uring/.gitignore index 749db17db..9382ae413 100644 --- a/testcases/kernel/syscalls/io_uring/.gitignore +++ b/testcases/kernel/syscalls/io_uring/.gitignore @@ -1,2 +1,3 @@ /io_uring01 /io_uring02 +/io_uring03 diff --git a/testcases/kernel/syscalls/io_uring/io_uring03.c b/testcases/kernel/syscalls/io_uring/io_uring03.c new file mode 100644 index 000000000..0a73a331a --- /dev/null +++ b/testcases/kernel/syscalls/io_uring/io_uring03.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2026 IBM + * Author: Sachin Sant + */ +/* + * Test IORING_OP_READ and IORING_OP_WRITE operations. + * + * This test validates basic read and write operations using io_uring. + * It tests: + * 1. IORING_OP_WRITE - Writing data to a file + * 2. IORING_OP_READ - Reading data from a file + * 3. Data integrity verification + */ + +#include "io_uring_common.h" + +#define TEST_FILE "io_uring_test_file" +#define QUEUE_DEPTH 2 +#define BLOCK_SZ 4096 + +static char write_buf[BLOCK_SZ]; +static char read_buf[BLOCK_SZ]; +static struct io_uring_submit s; +static sigset_t sig; + +static void init_buffer(char start_char) +{ + size_t i; + + for (i = 0; i < BLOCK_SZ; i++) + write_buf[i] = start_char + (i % 26); +} + +static void verify_data_integrity(const char *test_name) +{ + size_t i; + + if (memcmp(write_buf, read_buf, BLOCK_SZ) == 0) { + tst_res(TPASS, "%s data integrity verified", test_name); + } else { + tst_res(TFAIL, "%s data mismatch", test_name); + for (i = 0; i < BLOCK_SZ && i < 64; i++) { + if (write_buf[i] != read_buf[i]) { + tst_res(TINFO, "First mismatch at offset %zu: " + "wrote 0x%02x, read 0x%02x", + i, write_buf[i], read_buf[i]); + break; + } + } + } +} + +static void test_write_read(void) +{ + int fd; + + init_buffer('A'); + + fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644); + + tst_res(TINFO, "Testing IORING_OP_WRITE"); + io_uring_do_io_op(&s, fd, IORING_OP_WRITE, write_buf, BLOCK_SZ, 0, + &sig, "IORING_OP_WRITE completed successfully"); + + SAFE_FSYNC(fd); + + tst_res(TINFO, "Testing IORING_OP_READ"); + memset(read_buf, 0, BLOCK_SZ); + io_uring_do_io_op(&s, fd, IORING_OP_READ, read_buf, BLOCK_SZ, 0, + &sig, "IORING_OP_READ completed successfully"); + + verify_data_integrity("Basic I/O"); + + SAFE_CLOSE(fd); +} + +static void test_partial_io(void) +{ + int fd; + size_t half = BLOCK_SZ / 2; + + tst_res(TINFO, "Testing partial I/O operations"); + + init_buffer('a'); + + fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644); + + io_uring_do_io_op(&s, fd, IORING_OP_WRITE, write_buf, half, 0, + &sig, "Partial write (first half) succeeded"); + + io_uring_do_io_op(&s, fd, IORING_OP_WRITE, write_buf + half, half, + half, &sig, "Partial write (second half) succeeded"); + + SAFE_FSYNC(fd); + + memset(read_buf, 0, BLOCK_SZ); + io_uring_do_io_op(&s, fd, IORING_OP_READ, read_buf, BLOCK_SZ, 0, + &sig, "Full read after partial writes succeeded"); + + verify_data_integrity("Partial I/O"); + + SAFE_CLOSE(fd); +} + +static void run(void) +{ + io_uring_setup_queue(&s, QUEUE_DEPTH); + test_write_read(); + test_partial_io(); + io_uring_cleanup_queue(&s, QUEUE_DEPTH); +} + +static void setup(void) +{ + io_uring_setup_supported_by_kernel(); + sigemptyset(&sig); + memset(&s, 0, sizeof(s)); +} + +static struct tst_test test = { + .test_all = run, + .setup = setup, + .needs_tmpdir = 1, + .save_restore = (const struct tst_path_val[]) { + {"/proc/sys/kernel/io_uring_disabled", "0", + TST_SR_SKIP_MISSING | TST_SR_TCONF_RO}, + {} + } +}; diff --git a/testcases/kernel/syscalls/io_uring/io_uring_common.h b/testcases/kernel/syscalls/io_uring/io_uring_common.h new file mode 100644 index 000000000..4162b5571 --- /dev/null +++ b/testcases/kernel/syscalls/io_uring/io_uring_common.h @@ -0,0 +1,265 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2026 IBM + * Author: Sachin Sant + * + * Common definitions and helper functions for io_uring tests + */ + +#ifndef IO_URING_COMMON_H +#define IO_URING_COMMON_H + +#include +#include +#include +#include "config.h" +#include "tst_test.h" +#include "lapi/io_uring.h" + +/* Common structures for io_uring ring management */ +struct io_sq_ring { + unsigned int *head; + unsigned int *tail; + unsigned int *ring_mask; + unsigned int *ring_entries; + unsigned int *flags; + unsigned int *array; +}; + +struct io_cq_ring { + unsigned int *head; + unsigned int *tail; + unsigned int *ring_mask; + unsigned int *ring_entries; + struct io_uring_cqe *cqes; +}; + +struct io_uring_submit { + int ring_fd; + struct io_sq_ring sq_ring; + struct io_uring_sqe *sqes; + struct io_cq_ring cq_ring; + void *sq_ptr; + size_t sq_ptr_size; + void *cq_ptr; + size_t cq_ptr_size; +}; + +/* + * Setup io_uring instance with specified queue depth + * Returns 0 on success, -1 on failure + */ +static inline int io_uring_setup_queue(struct io_uring_submit *s, + unsigned int queue_depth) +{ + struct io_sq_ring *sring = &s->sq_ring; + struct io_cq_ring *cring = &s->cq_ring; + struct io_uring_params p; + + memset(&p, 0, sizeof(p)); + s->ring_fd = io_uring_setup(queue_depth, &p); + if (s->ring_fd < 0) { + tst_brk(TBROK | TERRNO, "io_uring_setup() failed"); + return -1; + } + + s->sq_ptr_size = p.sq_off.array + p.sq_entries * sizeof(unsigned int); + + /* Map submission queue ring buffer */ + s->sq_ptr = SAFE_MMAP(0, s->sq_ptr_size, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_POPULATE, s->ring_fd, + IORING_OFF_SQ_RING); + + /* Save submission queue pointers */ + sring->head = s->sq_ptr + p.sq_off.head; + sring->tail = s->sq_ptr + p.sq_off.tail; + sring->ring_mask = s->sq_ptr + p.sq_off.ring_mask; + sring->ring_entries = s->sq_ptr + p.sq_off.ring_entries; + sring->flags = s->sq_ptr + p.sq_off.flags; + sring->array = s->sq_ptr + p.sq_off.array; + + /* Map submission queue entries */ + s->sqes = SAFE_MMAP(0, p.sq_entries * sizeof(struct io_uring_sqe), + PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE, + s->ring_fd, IORING_OFF_SQES); + + s->cq_ptr_size = p.cq_off.cqes + + p.cq_entries * sizeof(struct io_uring_cqe); + + s->cq_ptr = SAFE_MMAP(0, s->cq_ptr_size, PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_POPULATE, s->ring_fd, + IORING_OFF_CQ_RING); + + /* Save completion queue pointers */ + cring->head = s->cq_ptr + p.cq_off.head; + cring->tail = s->cq_ptr + p.cq_off.tail; + cring->ring_mask = s->cq_ptr + p.cq_off.ring_mask; + cring->ring_entries = s->cq_ptr + p.cq_off.ring_entries; + cring->cqes = s->cq_ptr + p.cq_off.cqes; + + return 0; +} + +/* + * Cleanup io_uring instance and unmap all memory regions + */ +static inline void io_uring_cleanup_queue(struct io_uring_submit *s, + unsigned int queue_depth) +{ + if (s->sqes) + SAFE_MUNMAP(s->sqes, queue_depth * sizeof(struct io_uring_sqe)); + if (s->cq_ptr) + SAFE_MUNMAP(s->cq_ptr, s->cq_ptr_size); + if (s->sq_ptr) + SAFE_MUNMAP(s->sq_ptr, s->sq_ptr_size); + if (s->ring_fd > 0) + SAFE_CLOSE(s->ring_fd); +} + +/* + * Internal helper to submit a single SQE to the submission queue + * Used by both vectored and non-vectored I/O operations + */ +static inline void io_uring_submit_sqe_internal(struct io_uring_submit *s, + int fd, int opcode, + unsigned long addr, + unsigned int len, + off_t offset) +{ + struct io_sq_ring *sring = &s->sq_ring; + unsigned int tail, index; + struct io_uring_sqe *sqe; + + tail = *sring->tail; + index = tail & *sring->ring_mask; + sqe = &s->sqes[index]; + + memset(sqe, 0, sizeof(*sqe)); + sqe->opcode = opcode; + sqe->fd = fd; + sqe->addr = addr; + sqe->len = len; + sqe->off = offset; + sqe->user_data = opcode; + + sring->array[index] = index; + tail++; + + *sring->tail = tail; +} + +/* + * Submit a single SQE to the submission queue + * For basic read/write operations (non-vectored) + */ +static inline void io_uring_submit_sqe(struct io_uring_submit *s, int fd, + int opcode, void *buf, size_t len, + off_t offset) +{ + io_uring_submit_sqe_internal(s, fd, opcode, (unsigned long)buf, + len, offset); +} + +/* + * Submit a vectored SQE to the submission queue + * For readv/writev operations + */ +static inline void io_uring_submit_sqe_vec(struct io_uring_submit *s, int fd, + int opcode, struct iovec *iovs, + int nr_vecs, off_t offset) +{ + io_uring_submit_sqe_internal(s, fd, opcode, (unsigned long)iovs, + nr_vecs, offset); +} + +/* + * Wait for and validate a completion queue entry + * Returns 0 on success, -1 on failure + */ +static inline int io_uring_wait_cqe(struct io_uring_submit *s, + int expected_res, int expected_opcode, + sigset_t *sig) +{ + struct io_cq_ring *cring = &s->cq_ring; + struct io_uring_cqe *cqe; + unsigned int head; + int ret; + + ret = io_uring_enter(s->ring_fd, 1, 1, IORING_ENTER_GETEVENTS, sig); + if (ret < 0) { + tst_res(TFAIL | TERRNO, "io_uring_enter() failed"); + return -1; + } + + head = *cring->head; + if (head == *cring->tail) { + tst_res(TFAIL, "No completion event received"); + return -1; + } + + cqe = &cring->cqes[head & *cring->ring_mask]; + + if (cqe->user_data != (uint64_t)expected_opcode) { + tst_res(TFAIL, "Unexpected user_data: got %llu, expected %d", + (unsigned long long)cqe->user_data, expected_opcode); + *cring->head = head + 1; + return -1; + } + + if (cqe->res != expected_res) { + tst_res(TFAIL, "Operation failed: res=%d, expected=%d", + cqe->res, expected_res); + *cring->head = head + 1; + return -1; + } + + *cring->head = head + 1; + return 0; +} + +/* + * Initialize buffer with a repeating character pattern + * Useful for creating test data with predictable patterns + */ +static inline void io_uring_init_buffer_pattern(char *buf, size_t size, + char pattern) +{ + size_t i; + + for (i = 0; i < size; i++) + buf[i] = pattern; +} + +/* + * Submit and wait for a non-vectored I/O operation + * Combines io_uring_submit_sqe() and io_uring_wait_cqe() with result reporting + */ +static inline void io_uring_do_io_op(struct io_uring_submit *s, int fd, + int op, void *buf, size_t len, + off_t offset, sigset_t *sig, + const char *msg) +{ + io_uring_submit_sqe(s, fd, op, buf, len, offset); + + if (io_uring_wait_cqe(s, len, op, sig) == 0) + tst_res(TPASS, "%s", msg); +} + +/* + * Submit and wait for a vectored I/O operation + * Combines io_uring_submit_sqe_vec() and io_uring_wait_cqe() with + * result reporting + */ +static inline void io_uring_do_vec_io_op(struct io_uring_submit *s, int fd, + int op, struct iovec *iovs, + int nvecs, off_t offset, + int expected_size, sigset_t *sig, + const char *msg) +{ + io_uring_submit_sqe_vec(s, fd, op, iovs, nvecs, offset); + + if (io_uring_wait_cqe(s, expected_size, op, sig) == 0) + tst_res(TPASS, "%s", msg); +} + +#endif /* IO_URING_COMMON_H */ -- 2.39.1 -- Mailing list info: https://lists.linux.it/listinfo/ltp