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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Add new test case io_uring04.c to validate IORING_OP_READV and IORING_OP_WRITEV operations with uniform buffer sizes. Test performs: - Vectored write using multiple uniform buffers (4 x 1024 bytes) - Vectored read back into multiple uniform buffers - Data integrity verification across all vectors Also add helper functions to io_uring_common.h: - io_uring_init_iovec_pattern(): Initialize iovec buffers with patterns - io_uring_clear_iovec(): Clear iovec buffers by zeroing data - io_uring_verify_iovec(): Verify data integrity between write/read iovecs Update runtest/syscalls and .gitignore to include the new test. Signed-off-by: Sachin Sant --- V6 changes: - Split io_uring04.c into 3 independent tests - Linux to v5 https://lore.kernel.org/ltp/69fb33a1.5d0a0220.337e29.6038@mx.google.com/T/#t V5 changes: - Add clear_iovec_buffers() at the top of run() - Link to v4 https://lore.kernel.org/ltp/20260416062302.15804-1-sachinp@linux.ibm.com/T/ V4 changes: - Updated commit message to remove references to non-existent function - Removed extra blank line before test_writev_readv() - Link to v3 https://lore.kernel.org/ltp/20260416042531.81093-1-sachinp@linux.ibm.com/T/ V3 changes (2/3 io_uring04 only): - 1/3 and 3/3 from the patch series already merged. - Merged prepare_read_buffers() and clear_iovec_buffers() into single clear_iovec_buffers() function - Merged io_uring_init_buffer_pattern() into unified init_iovec_buffers() function that supports both rotating and simple character patterns - Removed io_uring_init_buffer_pattern() from io_uring_common.h as it's only used in io_uring04.c - Link to V2: https://lore.kernel.org/ltp/b4653e3f-ac9b-4a24-8d3f-51677c488e8c@linux.ibm.com/T/ V2 changes: - Use guarded buffer(including iovec) allocation - Move setup/cleanup code from run to appropriate path - Add a function to map the OP to the enum name - Define and use generic cleanup functions - Add a buffer size 0 in the middle of the iovec - Simplify setup_io_uring_test to use common code. - Link to V1: https://lore.kernel.org/ltp/20260320124742.75946-1-sachinp@linux.ibm.com/T/#t Changes after RFC patch series: - Addressed review comments - Refactored io_uring01 test to use common code - Removed git tags - Link to RFC: https://lore.kernel.org/ltp/20260318110328.52031-1-sachinp@linux.ibm.com/T/#t --- runtest/syscalls | 1 + testcases/kernel/syscalls/io_uring/.gitignore | 1 + .../kernel/syscalls/io_uring/io_uring04.c | 84 ++++++++++++++++++ .../syscalls/io_uring/io_uring_common.h | 86 +++++++++++++++++++ 4 files changed, 172 insertions(+) create mode 100644 testcases/kernel/syscalls/io_uring/io_uring04.c diff --git a/runtest/syscalls b/runtest/syscalls index f790e8f84..6b047b5fd 100644 --- a/runtest/syscalls +++ b/runtest/syscalls @@ -1904,6 +1904,7 @@ membarrier01 membarrier01 io_uring01 io_uring01 io_uring02 io_uring02 io_uring03 io_uring03 +io_uring04 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..8361b5df0 --- /dev/null +++ b/testcases/kernel/syscalls/io_uring/io_uring04.c @@ -0,0 +1,84 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2026 IBM + * Author: Sachin Sant + */ +/*\ + * Test basic IORING_OP_READV and IORING_OP_WRITEV operations. + * + * This test validates basic vectored read and write operations using + * io_uring with uniform buffer sizes. It performs: + * 1. IORING_OP_WRITEV - Writing data using multiple uniform buffers + * 2. IORING_OP_READV - Reading data back into multiple uniform buffers + * 3. Data integrity verification across all vectors + */ + +#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 struct iovec *write_iovs, *read_iovs; +static struct io_uring_submit s; +static sigset_t sig; + +static void run(void) +{ + int fd = -1; + int total_size = NUM_VECS * VEC_SIZE; + + io_uring_init_iovec_pattern(write_iovs, NUM_VECS, 'A', 1); + io_uring_clear_iovec(read_iovs, NUM_VECS); + + fd = SAFE_OPEN(TEST_FILE, O_RDWR | O_CREAT | O_TRUNC, 0644); + + tst_res(TINFO, "Writing %d bytes using %d vectors", + total_size, NUM_VECS); + io_uring_do_vec_io_op(&s, fd, IORING_OP_WRITEV, write_iovs, NUM_VECS, + 0, total_size, &sig); + + SAFE_FSYNC(fd); + + tst_res(TINFO, "Reading %d bytes using %d vectors", + total_size, NUM_VECS); + io_uring_do_vec_io_op(&s, fd, IORING_OP_READV, read_iovs, NUM_VECS, + 0, total_size, &sig); + + io_uring_verify_iovec(write_iovs, read_iovs, NUM_VECS); + + SAFE_CLOSE(fd); +} + +static void setup(void) +{ + io_uring_setup_supported_by_kernel(); + sigemptyset(&sig); + memset(&s, 0, sizeof(s)); + io_uring_setup_queue(&s, QUEUE_DEPTH, 0); +} + +static void cleanup(void) +{ + io_uring_cleanup_queue(&s, QUEUE_DEPTH); +} + +static struct tst_test test = { + .test_all = run, + .setup = setup, + .cleanup = cleanup, + .needs_tmpdir = 1, + .bufs = (struct tst_buffers []) { + {&write_iovs, .iov_sizes = (int[]){VEC_SIZE, VEC_SIZE, + VEC_SIZE, VEC_SIZE, -1}}, + {&read_iovs, .iov_sizes = (int[]){VEC_SIZE, VEC_SIZE, + VEC_SIZE, VEC_SIZE, -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 index aa31339fb..523f686f8 100644 --- a/testcases/kernel/syscalls/io_uring/io_uring_common.h +++ b/testcases/kernel/syscalls/io_uring/io_uring_common.h @@ -275,4 +275,90 @@ static inline void io_uring_do_vec_io_op(struct io_uring_submit *s, int fd, expected_size); } +/* + * Initialize iovec buffers with pattern + * @iovs: array of iovec structures + * @nvecs: number of iovecs + * @base_char: base character for pattern (must be 'A'-'Z') + * @use_rotating: if non-zero, use rotating pattern; if zero, use simple repeat + */ +static inline void io_uring_init_iovec_pattern(struct iovec *iovs, int nvecs, + char base_char, int use_rotating) +{ + int i; + size_t j; + char *buf; + + if (base_char < 'A' || base_char > 'Z') + tst_brk(TBROK, "base_char must be 'A'-'Z', got '%c'", + base_char); + + for (i = 0; i < nvecs; i++) { + if (iovs[i].iov_len == 0) + continue; + + buf = (char *)iovs[i].iov_base; + if (use_rotating) { + /* Each vector has a different rotating pattern */ + for (j = 0; j < iovs[i].iov_len; j++) + buf[j] = 'A' + ((base_char - 'A' + i + j) % 26); + } else { + for (j = 0; j < iovs[i].iov_len; j++) + buf[j] = 'A' + ((base_char - 'A' + i) % 26); + } + } +} + +/* + * Clear iovec buffers by zeroing all data + */ +static inline void io_uring_clear_iovec(struct iovec *iovs, int nvecs) +{ + int i; + + for (i = 0; i < nvecs; i++) + memset(iovs[i].iov_base, 0, iovs[i].iov_len); +} + +/* + * Verify data integrity between write and read iovecs + * Stops test execution on verification failure + */ +static inline void io_uring_verify_iovec(struct iovec *write_iovs, + struct iovec *read_iovs, int nvecs) +{ + int i; + size_t j; + + for (i = 0; i < nvecs; i++) { + if (write_iovs[i].iov_len != read_iovs[i].iov_len) { + tst_brk(TFAIL, + "iovec %d length mismatch: write=%zu read=%zu", + i, write_iovs[i].iov_len, read_iovs[i].iov_len); + } + + if (memcmp(write_iovs[i].iov_base, read_iovs[i].iov_base, + write_iovs[i].iov_len) != 0) { + for (j = 0; j < write_iovs[i].iov_len; j++) { + char *wbuf = (char *)write_iovs[i].iov_base; + char *rbuf = (char *)read_iovs[i].iov_base; + + if (wbuf[j] != rbuf[j]) { + tst_res(TINFO, + "Vector %d: first mismatch at " + "offset %zu: wrote 0x%02x, " + "read 0x%02x", + i, j, + (unsigned char)wbuf[j], + (unsigned char)rbuf[j]); + break; + } + } + tst_brk(TFAIL, "data mismatch in vector %d", i); + } + } + + tst_res(TPASS, "data integrity verified across %d vectors", nvecs); +} + #endif /* IO_URING_COMMON_H */ -- 2.39.1 -- Mailing list info: https://lists.linux.it/listinfo/ltp