* [LTP] [RFC] [PATCH 1/2] io_uring: Test IORING READ and WRITE operations
2026-03-18 11:03 [LTP] [RFC] [PATCH 0/2] io_uring READ(V), WRITE(v) operation tests Sachin Sant
@ 2026-03-18 11:03 ` Sachin Sant
2026-03-19 16:49 ` Cyril Hrubis
2026-03-18 11:03 ` [LTP] [RFC] [PATCH 2/2] io_uring: Test READV and WRITEV operations Sachin Sant
1 sibling, 1 reply; 5+ messages in thread
From: Sachin Sant @ 2026-03-18 11:03 UTC (permalink / raw)
To: 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 <sachinp@linux.ibm.com>
---
runtest/syscalls | 1 +
testcases/kernel/syscalls/io_uring/.gitignore | 1 +
.../kernel/syscalls/io_uring/io_uring03.c | 145 +++++++++++
.../syscalls/io_uring/io_uring_common.h | 227 ++++++++++++++++++
4 files changed, 374 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..53d4feae5
--- /dev/null
+++ b/testcases/kernel/syscalls/io_uring/io_uring03.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 IBM
+ * Author: Sachin Sant <sachinp@linux.ibm.com>
+ *
+ * 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 test_write_read(void)
+{
+ int fd;
+ size_t i;
+
+ /* Prepare write buffer with pattern */
+ for (i = 0; i < BLOCK_SZ; i++)
+ write_buf[i] = 'A' + (i % 26);
+
+ /* Open file for writing */
+ fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644);
+
+ /* Test IORING_OP_WRITE */
+ tst_res(TINFO, "Testing IORING_OP_WRITE");
+ io_uring_submit_sqe(&s, fd, IORING_OP_WRITE, write_buf, BLOCK_SZ, 0);
+
+ if (io_uring_wait_cqe(&s, BLOCK_SZ, IORING_OP_WRITE, &sig) == 0)
+ tst_res(TPASS, "IORING_OP_WRITE completed successfully");
+
+ /* Sync to ensure data is written */
+ SAFE_FSYNC(fd);
+
+ /* Test IORING_OP_READ */
+ tst_res(TINFO, "Testing IORING_OP_READ");
+ memset(read_buf, 0, BLOCK_SZ);
+ io_uring_submit_sqe(&s, fd, IORING_OP_READ, read_buf, BLOCK_SZ, 0);
+
+ if (io_uring_wait_cqe(&s, BLOCK_SZ, IORING_OP_READ, &sig) == 0)
+ tst_res(TPASS, "IORING_OP_READ completed successfully");
+
+ /* Verify data integrity */
+ if (memcmp(write_buf, read_buf, BLOCK_SZ) == 0) {
+ tst_res(TPASS, "Data integrity verified");
+ } else {
+ tst_res(TFAIL, "Data mismatch after read");
+ 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;
+ }
+ }
+ }
+
+ SAFE_CLOSE(fd);
+}
+
+static void test_partial_io(void)
+{
+ int fd;
+ size_t half = BLOCK_SZ / 2;
+ size_t i;
+
+ tst_res(TINFO, "Testing partial I/O operations");
+
+ /* Prepare buffer */
+ for (i = 0; i < BLOCK_SZ; i++)
+ write_buf[i] = 'a' + (i % 26);
+
+ fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644);
+
+ /* Write first half */
+ io_uring_submit_sqe(&s, fd, IORING_OP_WRITE, write_buf, half, 0);
+ if (io_uring_wait_cqe(&s, half, IORING_OP_WRITE, &sig) == 0)
+ tst_res(TPASS, "Partial write (first half) succeeded");
+
+ /* Write second half */
+ io_uring_submit_sqe(&s, fd, IORING_OP_WRITE, write_buf + half,
+ half, half);
+ if (io_uring_wait_cqe(&s, half, IORING_OP_WRITE, &sig) == 0)
+ tst_res(TPASS, "Partial write (second half) succeeded");
+
+ SAFE_FSYNC(fd);
+
+ /* Read back in one operation */
+ memset(read_buf, 0, BLOCK_SZ);
+ io_uring_submit_sqe(&s, fd, IORING_OP_READ, read_buf, BLOCK_SZ, 0);
+ if (io_uring_wait_cqe(&s, BLOCK_SZ, IORING_OP_READ, &sig) == 0)
+ tst_res(TPASS, "Full read after partial writes succeeded");
+
+ /* Verify */
+ if (memcmp(write_buf, read_buf, BLOCK_SZ) == 0)
+ tst_res(TPASS, "Partial I/O data integrity verified");
+ else
+ tst_res(TFAIL, "Partial I/O data mismatch");
+
+ 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},
+ {}
+ },
+ .tags = (const struct tst_tag[]) {
+ {"linux-git", "5d17b4a4b48c"},
+ {"linux-git", "2b188cc1bb85"},
+ {}
+ }
+};
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..df05a0759
--- /dev/null
+++ b/testcases/kernel/syscalls/io_uring/io_uring_common.h
@@ -0,0 +1,227 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 IBM
+ * Author: Sachin Sant <sachinp@linux.ibm.com>
+ *
+ * Common definitions and helper functions for io_uring tests
+ */
+
+#ifndef IO_URING_COMMON_H
+#define IO_URING_COMMON_H
+
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#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);
+
+ /* Map completion queue ring buffer */
+ 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);
+}
+
+/*
+ * 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)
+{
+ 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 = (unsigned long)buf;
+ sqe->len = len;
+ sqe->off = offset;
+ sqe->user_data = opcode;
+
+ sring->array[index] = index;
+ tail++;
+
+ /* Update tail to make SQE visible to kernel */
+ *sring->tail = tail;
+}
+
+/*
+ * 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)
+{
+ 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 = (unsigned long)iovs;
+ sqe->len = nr_vecs;
+ sqe->off = offset;
+ sqe->user_data = opcode;
+
+ sring->array[index] = index;
+ tail++;
+
+ /* Update tail to make SQE visible to kernel */
+ *sring->tail = tail;
+}
+
+/*
+ * 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",
+ 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;
+}
+
+#endif /* IO_URING_COMMON_H */
--
2.39.1
--
Mailing list info: https://lists.linux.it/listinfo/ltp
^ permalink raw reply related [flat|nested] 5+ messages in thread* [LTP] [RFC] [PATCH 2/2] io_uring: Test READV and WRITEV operations
2026-03-18 11:03 [LTP] [RFC] [PATCH 0/2] io_uring READ(V), WRITE(v) operation tests Sachin Sant
2026-03-18 11:03 ` [LTP] [RFC] [PATCH 1/2] io_uring: Test IORING READ and WRITE operations Sachin Sant
@ 2026-03-18 11:03 ` Sachin Sant
1 sibling, 0 replies; 5+ messages in thread
From: Sachin Sant @ 2026-03-18 11:03 UTC (permalink / raw)
To: ltp
This test validates vectored read and write operations using io_uring.
It tests:
1. IORING_OP_WRITEV - Writing data using multiple buffers (scatter)
2. IORING_OP_READV - Reading data into multiple buffers (gather)
3. Data integrity verification across multiple iovecs
4. Edge cases with different iovec configurations
Signed-off-by: Sachin Sant <sachinp@linux.ibm.com>
---
runtest/syscalls | 1 +
testcases/kernel/syscalls/io_uring/.gitignore | 1 +
.../kernel/syscalls/io_uring/io_uring04.c | 248 ++++++++++++++++++
3 files changed, 250 insertions(+)
create mode 100644 testcases/kernel/syscalls/io_uring/io_uring04.c
diff --git a/runtest/syscalls b/runtest/syscalls
index 7dc80fe29..100ae7706 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -1899,6 +1899,7 @@ membarrier01 membarrier01
io_uring01 io_uring01
io_uring02 io_uring02
io_uring03 io_uring03
+io_uring03 io_uring04
# 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 9382ae413..36cd24662 100644
--- a/testcases/kernel/syscalls/io_uring/.gitignore
+++ b/testcases/kernel/syscalls/io_uring/.gitignore
@@ -1,3 +1,4 @@
/io_uring01
/io_uring02
/io_uring03
+/io_uring04
diff --git a/testcases/kernel/syscalls/io_uring/io_uring04.c b/testcases/kernel/syscalls/io_uring/io_uring04.c
new file mode 100644
index 000000000..fa61f0962
--- /dev/null
+++ b/testcases/kernel/syscalls/io_uring/io_uring04.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2026 IBM
+ * Author: Sachin Sant <sachinp@linux.ibm.com>
+ *
+ * Test IORING_OP_READV and IORING_OP_WRITEV operations.
+ *
+ * This test validates vectored read and write operations using io_uring.
+ * It tests:
+ * 1. IORING_OP_WRITEV - Writing data using multiple buffers (scatter)
+ * 2. IORING_OP_READV - Reading data into multiple buffers (gather)
+ * 3. Data integrity verification across multiple iovecs
+ * 4. Edge cases with different iovec configurations
+ */
+
+#include "io_uring_common.h"
+
+#define TEST_FILE "io_uring_test_file"
+#define QUEUE_DEPTH 2
+#define NUM_VECS 4
+#define VEC_SIZE 1024
+
+static char write_bufs[NUM_VECS][VEC_SIZE];
+static char read_bufs[NUM_VECS][VEC_SIZE];
+static struct iovec write_iovs[NUM_VECS];
+static struct iovec read_iovs[NUM_VECS];
+static struct io_uring_submit s;
+static sigset_t sig;
+
+static void prepare_write_buffers(void)
+{
+ size_t i, j;
+
+ for (i = 0; i < NUM_VECS; i++) {
+ for (j = 0; j < VEC_SIZE; j++) {
+ /* Each vector has a different pattern */
+ write_bufs[i][j] = 'A' + i + (j % 26);
+ }
+ write_iovs[i].iov_base = write_bufs[i];
+ write_iovs[i].iov_len = VEC_SIZE;
+ }
+}
+
+static void prepare_read_buffers(void)
+{
+ size_t i;
+
+ for (i = 0; i < NUM_VECS; i++) {
+ memset(read_bufs[i], 0, VEC_SIZE);
+ read_iovs[i].iov_base = read_bufs[i];
+ read_iovs[i].iov_len = VEC_SIZE;
+ }
+}
+
+static void test_writev_readv(void)
+{
+ int fd;
+ size_t i, j;
+ int total_size = NUM_VECS * VEC_SIZE;
+
+ tst_res(TINFO, "Testing IORING_OP_WRITEV and IORING_OP_READV");
+
+ prepare_write_buffers();
+ prepare_read_buffers();
+
+ fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644);
+
+ /* Test IORING_OP_WRITEV */
+ tst_res(TINFO, "Writing %d bytes using %d vectors", total_size, NUM_VECS);
+ io_uring_submit_sqe_vec(&s, fd, IORING_OP_WRITEV, write_iovs,
+ NUM_VECS, 0);
+
+ if (io_uring_wait_cqe(&s, total_size, IORING_OP_WRITEV, &sig) == 0)
+ tst_res(TPASS, "IORING_OP_WRITEV completed successfully");
+
+ SAFE_FSYNC(fd);
+
+ /* Test IORING_OP_READV */
+ tst_res(TINFO, "Reading %d bytes using %d vectors", total_size, NUM_VECS);
+ io_uring_submit_sqe_vec(&s, fd, IORING_OP_READV, read_iovs,
+ NUM_VECS, 0);
+
+ if (io_uring_wait_cqe(&s, total_size, IORING_OP_READV, &sig) == 0)
+ tst_res(TPASS, "IORING_OP_READV completed successfully");
+
+ /* Verify data integrity for each vector */
+ for (i = 0; i < NUM_VECS; i++) {
+ if (memcmp(write_bufs[i], read_bufs[i], VEC_SIZE) != 0) {
+ tst_res(TFAIL, "Data mismatch in vector %zu", i);
+ for (j = 0; j < VEC_SIZE && j < 64; j++) {
+ if (write_bufs[i][j] != read_bufs[i][j]) {
+ tst_res(TINFO, "Vector %zu: first mismatch at "
+ "offset %zu: wrote 0x%02x, read 0x%02x",
+ i, j, write_bufs[i][j], read_bufs[i][j]);
+ break;
+ }
+ }
+ SAFE_CLOSE(fd);
+ return;
+ }
+ }
+
+ tst_res(TPASS, "Data integrity verified across all %d vectors", NUM_VECS);
+ SAFE_CLOSE(fd);
+}
+
+static void test_partial_vectors(void)
+{
+ int fd;
+ struct iovec partial_write[2];
+ struct iovec partial_read[2];
+ size_t i;
+ int expected_size;
+
+ tst_res(TINFO, "Testing partial vector operations");
+
+ prepare_write_buffers();
+ prepare_read_buffers();
+
+ fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644);
+
+ /* Write using only 2 vectors */
+ partial_write[0] = write_iovs[0];
+ partial_write[1] = write_iovs[1];
+ expected_size = 2 * VEC_SIZE;
+
+ io_uring_submit_sqe_vec(&s, fd, IORING_OP_WRITEV, partial_write, 2, 0);
+ if (io_uring_wait_cqe(&s, expected_size, IORING_OP_WRITEV, &sig) == 0)
+ tst_res(TPASS, "Partial IORING_OP_WRITEV (2 vectors) succeeded");
+
+ SAFE_FSYNC(fd);
+
+ /* Read back using 2 vectors */
+ partial_read[0] = read_iovs[0];
+ partial_read[1] = read_iovs[1];
+
+ io_uring_submit_sqe_vec(&s, fd, IORING_OP_READV, partial_read, 2, 0);
+ if (io_uring_wait_cqe(&s, expected_size, IORING_OP_READV, &sig) == 0)
+ tst_res(TPASS, "Partial IORING_OP_READV (2 vectors) succeeded");
+
+ /* Verify only the first 2 vectors */
+ for (i = 0; i < 2; i++) {
+ if (memcmp(write_bufs[i], read_bufs[i], VEC_SIZE) != 0) {
+ tst_res(TFAIL, "Partial vector data mismatch at vector %zu", i);
+ SAFE_CLOSE(fd);
+ return;
+ }
+ }
+
+ tst_res(TPASS, "Partial vector data integrity verified");
+ SAFE_CLOSE(fd);
+}
+
+static void test_varying_sizes(void)
+{
+ int fd;
+ struct iovec var_write[3];
+ struct iovec var_read[3];
+ char buf1[512], buf2[1024], buf3[256];
+ char rbuf1[512], rbuf2[1024], rbuf3[256];
+ size_t i;
+ int expected_size = 512 + 1024 + 256;
+
+ tst_res(TINFO, "Testing vectors with varying sizes");
+
+ /* Prepare buffers with different sizes */
+ for (i = 0; i < 512; i++)
+ buf1[i] = 'X';
+ for (i = 0; i < 1024; i++)
+ buf2[i] = 'Y';
+ for (i = 0; i < 256; i++)
+ buf3[i] = 'Z';
+
+ var_write[0].iov_base = buf1;
+ var_write[0].iov_len = 512;
+ var_write[1].iov_base = buf2;
+ var_write[1].iov_len = 1024;
+ var_write[2].iov_base = buf3;
+ var_write[2].iov_len = 256;
+
+ memset(rbuf1, 0, 512);
+ memset(rbuf2, 0, 1024);
+ memset(rbuf3, 0, 256);
+
+ var_read[0].iov_base = rbuf1;
+ var_read[0].iov_len = 512;
+ var_read[1].iov_base = rbuf2;
+ var_read[1].iov_len = 1024;
+ var_read[2].iov_base = rbuf3;
+ var_read[2].iov_len = 256;
+
+ fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644);
+
+ /* Write with varying sizes */
+ io_uring_submit_sqe_vec(&s, fd, IORING_OP_WRITEV, var_write, 3, 0);
+ if (io_uring_wait_cqe(&s, expected_size, IORING_OP_WRITEV, &sig) == 0)
+ tst_res(TPASS, "IORING_OP_WRITEV with varying sizes succeeded");
+
+ SAFE_FSYNC(fd);
+
+ /* Read back with varying sizes */
+ io_uring_submit_sqe_vec(&s, fd, IORING_OP_READV, var_read, 3, 0);
+ if (io_uring_wait_cqe(&s, expected_size, IORING_OP_READV, &sig) == 0)
+ tst_res(TPASS, "IORING_OP_READV with varying sizes succeeded");
+
+ /* Verify each buffer */
+ if (memcmp(buf1, rbuf1, 512) == 0 &&
+ memcmp(buf2, rbuf2, 1024) == 0 &&
+ memcmp(buf3, rbuf3, 256) == 0) {
+ tst_res(TPASS, "Varying size vector data integrity verified");
+ } else {
+ tst_res(TFAIL, "Varying size vector data mismatch");
+ }
+
+ SAFE_CLOSE(fd);
+}
+
+static void run(void)
+{
+ io_uring_setup_queue(&s, QUEUE_DEPTH);
+ test_writev_readv();
+ test_partial_vectors();
+ test_varying_sizes();
+ 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},
+ {}
+ },
+ .tags = (const struct tst_tag[]) {
+ {"linux-git", "2b188cc1bb85"},
+ {"linux-git", "f67676d160c6"},
+ {}
+ }
+};
--
2.39.1
--
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