/* * Copyright (c) International Business Machines Corp., 2004 * Copyright (c) Linux Test Project, 2004-2017 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See * the GNU General Public License for more details. */ /* * DESCRIPTION * hugeshmat02 - check for EINVAL and EACCES errors with hugetlb * * ALGORITHM * loop if that option was specified * call shmat() using three invalid test cases * check the errno value * issue a PASS message if we get EINVAL or EACCES * otherwise, the tests fails * issue a FAIL message * call cleanup * * HISTORY * 03/2001 - Written by Wayne Boyer * 04/2004 - Updated By Robbie Williamson * * RESTRICTIONS * Must be ran as root */ #include <pwd.h> #include <limits.h> #include "hugetlb.h" #if __WORDSIZE == 64 #define NADDR 0x10000000eef /* a 64bit non alligned address value */ #else #define NADDR 0x60000eef /* a non alligned address value */ #endif static size_t shm_size; static int shm_id_1 = -1; static int shm_id_2 = -1; static void *addr; static long hugepages = 128; static struct tst_option options[] = { {"s:", &nr_opt, "-s num Set the number of the been allocated hugepages"}, {NULL, NULL, NULL} }; struct tcase { int *shmid; void *addr; int error; } tcases[] = { /* EINVAL - the shared memory ID is not valid */ {&shm_id_1, NULL, EINVAL}, /* EINVAL - the address is not page aligned and SHM_RND is not given */ {&shm_id_2, (void *)NADDR, EINVAL} }; static void verify_hugeshmat(unsigned int i) { struct tcase *tc = &tcases[i]; addr = shmat(*(tc->shmid), tc->addr, 0); if (addr != (void *)-1) { tst_res(TFAIL, "shmat suceeded unexpectedly"); return; } if (errno == tc->error) { tst_res(TPASS | TERRNO, "shmat failed as " "expected"); } else { tst_res(TFAIL | TERRNO, "shmat failed " "unexpectedly - expect errno=%d, " "got", tc->error); } } void setup(void) { long hpage_size; save_nr_hugepages(); if (nr_opt) hugepages = SAFE_STRTOL(nr_opt, 0, LONG_MAX); set_sys_tune("nr_hugepages", hugepages, 1); hpage_size = SAFE_READ_MEMINFO("Hugepagesize:") * 1024; shm_size = hpage_size * hugepages / 2; update_shm_size(&shm_size); shmkey = getipckey(); /* create a shared memory resource with read and write permissions */ /* also post increment the shmkey for the next shmget call */ shm_id_2 = shmget(shmkey++, shm_size, SHM_HUGETLB | SHM_RW | IPC_CREAT | IPC_EXCL); if (shm_id_2 == -1) tst_brk(TBROK | TERRNO, "shmget"); } void cleanup(void) { rm_shm(shm_id_2); restore_nr_hugepages(); } static struct tst_test test = { .needs_root = 1, .needs_tmpdir = 1, .options = options, .tcnt = ARRAY_SIZE(tcases), .test = verify_hugeshmat, .setup = setup, .cleanup = cleanup, };