127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2006
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* Copyright (c) 2014 Cyril Hrubis <chrubis@suse.cz>
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* Author: Yi Yang <yyangcdl@cn.ibm.com>
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*/
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#define _GNU_SOURCE
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/poll.h>
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#include "tst_test.h"
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#include "lapi/fcntl.h"
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#include "lapi/splice.h"
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#include "lapi/vmsplice.h"
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#define TEST_BLOCK_SIZE (1<<17) /* 128K */
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#define TESTFILE "vmsplice_test_file"
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static int fd_out;
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static char buffer[TEST_BLOCK_SIZE];
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static void check_file(void)
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{
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int i;
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char vmsplicebuffer[TEST_BLOCK_SIZE];
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fd_out = SAFE_OPEN(TESTFILE, O_RDONLY);
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SAFE_READ(1, fd_out, vmsplicebuffer, TEST_BLOCK_SIZE);
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for (i = 0; i < TEST_BLOCK_SIZE; i++) {
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if (buffer[i] != vmsplicebuffer[i])
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break;
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}
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if (i < TEST_BLOCK_SIZE)
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tst_res(TFAIL, "Wrong data read from the buffer at %i", i);
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else
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tst_res(TPASS, "Written data has been read back correctly");
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SAFE_CLOSE(fd_out);
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}
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static void vmsplice_test(void)
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{
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int pipes[2];
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long written;
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int ret;
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int fd_out;
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struct iovec v;
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loff_t offset;
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v.iov_base = buffer;
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v.iov_len = TEST_BLOCK_SIZE;
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fd_out = SAFE_OPEN(TESTFILE, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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SAFE_PIPE(pipes);
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struct pollfd pfd = {.fd = pipes[1], .events = POLLOUT};
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offset = 0;
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while (v.iov_len) {
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/*
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* in a real app you'd be more clever with poll of course,
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* here we are basically just blocking on output room and
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* not using the free time for anything interesting.
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*/
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if (poll(&pfd, 1, -1) < 0)
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tst_brk(TBROK | TERRNO, "poll() failed");
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written = vmsplice(pipes[1], &v, 1, 0);
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if (written < 0) {
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tst_brk(TBROK | TERRNO, "vmsplice() failed");
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} else {
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if (written == 0) {
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break;
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} else {
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v.iov_base += written;
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v.iov_len -= written;
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}
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}
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ret = splice(pipes[0], NULL, fd_out, &offset, written, 0);
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if (ret < 0)
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tst_brk(TBROK | TERRNO, "splice() failed");
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//printf("offset = %lld\n", (long long)offset);
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}
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SAFE_CLOSE(pipes[0]);
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SAFE_CLOSE(pipes[1]);
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SAFE_CLOSE(fd_out);
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check_file();
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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 void cleanup(void)
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{
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if (fd_out > 0)
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SAFE_CLOSE(fd_out);
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}
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static struct tst_test test = {
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.setup = setup,
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.cleanup = cleanup,
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.test_all = vmsplice_test,
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.needs_tmpdir = 1,
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.skip_filesystems = (const char *const []) {
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"nfs",
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NULL
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},
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.min_kver = "2.6.17",
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};
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