96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Zilogic Systems Pvt. Ltd., 2018
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* Email: code@zilogic.com
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*/
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/*
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* Test: Validating memfd_create() with MFD_HUGETLB and MFD_HUGE_x flags.
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*
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* Test cases: Attempt to create files in the hugetlbfs filesystem using
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* different huge page sizes.
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*
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* Test logic: memfd_create() should return non-negative value (fd)
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* if the system supports that particular huge page size.
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* On success, fd is returned.
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* On failure, -1 is returned with ENODEV error.
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*/
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#define _GNU_SOURCE
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#include "tst_test.h"
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#include "memfd_create_common.h"
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#include <errno.h>
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#include <stdio.h>
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#define PATH_HUGEPAGES "/sys/kernel/mm/hugepages"
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static struct test_flag {
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int flag;
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char *h_size;
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int exp_err;
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} test_flags[] = {
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{.flag = MFD_HUGE_64KB, .h_size = "64kB"},
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{.flag = MFD_HUGE_512KB, .h_size = "512kB"},
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{.flag = MFD_HUGE_2MB, .h_size = "2048kB"},
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{.flag = MFD_HUGE_8MB, .h_size = "8192kB"},
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{.flag = MFD_HUGE_16MB, .h_size = "16384kB"},
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{.flag = MFD_HUGE_256MB, .h_size = "262144kB"},
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{.flag = MFD_HUGE_1GB, .h_size = "1048576kB"},
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{.flag = MFD_HUGE_2GB, .h_size = "2097152kB"},
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{.flag = MFD_HUGE_16GB, .h_size = "16777216kB"},
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};
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static void check_hugepage_support(struct test_flag *test_flags)
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{
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char pattern[64];
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sprintf(pattern, PATH_HUGEPAGES);
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strcat(pattern, "/hugepages-");
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strcat(pattern, test_flags->h_size);
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if (access(pattern, F_OK))
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test_flags->exp_err = ENODEV;
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}
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static void memfd_huge_x_controller(unsigned int n)
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{
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int fd;
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struct test_flag tflag;
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tflag = test_flags[n];
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check_hugepage_support(&tflag);
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tst_res(TINFO,
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"Attempt to create file using %s huge page size",
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tflag.h_size);
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fd = sys_memfd_create("tfile", MFD_HUGETLB | tflag.flag);
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if (fd < 0) {
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if (errno == tflag.exp_err)
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tst_res(TPASS, "Test failed as expected");
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else
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tst_brk(TFAIL | TERRNO,
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"memfd_create() failed unexpectedly");
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return;
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}
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tst_res(TPASS,
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"memfd_create succeeded for %s page size",
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tflag.h_size);
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}
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static void setup(void)
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{
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if (access(PATH_HUGEPAGES, F_OK))
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tst_brk(TCONF, "Huge page is not supported");
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}
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static struct tst_test test = {
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.setup = setup,
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.test = memfd_huge_x_controller,
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.tcnt = ARRAY_SIZE(test_flags),
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.min_kver = "4.14",
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};
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