71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 SUSE LLC
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* Author: Jorik Cronenberg <jcronenberg@suse.de>
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*
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* Test vmsplice() from a pipe into user memory
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*/
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#define _GNU_SOURCE
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#include "tst_test.h"
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#include "lapi/fcntl.h"
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#include "lapi/vmsplice.h"
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#define TEST_BLOCK_SIZE (64*1024) /* 64K */
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static char buffer[TEST_BLOCK_SIZE];
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static struct iovec *iov;
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static void vmsplice_test(void)
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{
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int written, i;
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int pipes[2];
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char *arr_write = iov->iov_base;
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memset(iov->iov_base, 0, iov->iov_len);
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SAFE_PIPE(pipes);
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SAFE_WRITE(1, pipes[1], buffer, TEST_BLOCK_SIZE);
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written = vmsplice(pipes[0], iov, 1, 0);
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if (written < 0)
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tst_brk(TBROK | TERRNO, "vmsplice() failed");
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if (written == 0) {
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tst_res(TFAIL, "vmsplice() didn't write anything");
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} else {
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for (i = 0; i < TEST_BLOCK_SIZE; i++) {
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if (arr_write[i] != buffer[i]) {
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tst_res(TFAIL,
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"Wrong data in user memory at %i", i);
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break;
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}
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}
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if (i == written)
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tst_res(TPASS, "Spliced correctly into user memory");
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}
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SAFE_CLOSE(pipes[1]);
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SAFE_CLOSE(pipes[0]);
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}
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static void setup(void)
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{
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int i;
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for (i = 0; i < TEST_BLOCK_SIZE; i++)
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buffer[i] = i & 0xff;
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}
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static struct tst_test test = {
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.setup = setup,
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.test_all = vmsplice_test,
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.min_kver = "2.6.23",
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.bufs = (struct tst_buffers []) {
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{&iov, .iov_sizes = (int[]){TEST_BLOCK_SIZE, -1}},
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{}
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}
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};
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