87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
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// SPDX-License-Identifier: LGPL-2.1-or-later
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/*
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* Copyright (C) 2005-2006 IBM Corporation.
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* Author: David Gibson & Adam Litke
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*/
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/*\
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* [Description]
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*
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* This Test perform Direct Write/Read from/To hugetlbfs file
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* which is mapped to process address space. The test is checking if it
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* succeeds and data written or read is not corrupted.
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*/
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <sys/mount.h>
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#include <limits.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include "hugetlb.h"
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#define P0 "ffffffff"
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#define IOSZ 4096
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#define NORMAL_PATH ""
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#define MNTPOINT "hugetlbfs/"
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static long hpage_size;
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static int fd = -1, nfd = -1;
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static void run_test(void)
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{
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void *p;
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char buf[IOSZ] __attribute__((aligned(IOSZ)));
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fd = tst_creat_unlinked(MNTPOINT, 0);
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nfd = tst_creat_unlinked(NORMAL_PATH, O_DIRECT);
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p = SAFE_MMAP(NULL, hpage_size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
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memcpy(p, P0, 8);
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SAFE_WRITE(1, nfd, p, IOSZ);
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SAFE_LSEEK(nfd, 0, SEEK_SET);
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SAFE_READ(1, nfd, buf, IOSZ);
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if (memcmp(P0, buf, 8)) {
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tst_res(TFAIL, "Memory mismatch after Direct-IO write");
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goto cleanup;
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}
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SAFE_LSEEK(nfd, 0, SEEK_SET);
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memset(p, 0, IOSZ);
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SAFE_READ(1, nfd, p, IOSZ);
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if (memcmp(p, P0, 8))
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tst_res(TFAIL, "Memory mismatch after Direct-IO read");
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else
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tst_res(TPASS, "Direct-IO read/write to/from hugepages is successful");
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cleanup:
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SAFE_MUNMAP(p, hpage_size);
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SAFE_CLOSE(fd);
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SAFE_CLOSE(nfd);
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}
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static void setup(void)
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{
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hpage_size = SAFE_READ_MEMINFO(MEMINFO_HPAGE_SIZE)*1024;
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}
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static void cleanup(void)
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{
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if (fd > 0)
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SAFE_CLOSE(fd);
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if (nfd > 0)
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SAFE_CLOSE(nfd);
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}
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static struct tst_test test = {
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.needs_root = 1,
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.mntpoint = MNTPOINT,
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.needs_hugetlbfs = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = run_test,
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.hugepages = {1, TST_NEEDS},
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};
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