1a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka/* Copyright (c) 2014 Red Hat, Inc. 2a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 3a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * This program is free software: you can redistribute it and/or modify 4a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * it under the terms of version 2 the GNU General Public License as 5a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * published by the Free Software Foundation. 6a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 7a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * This program is distributed in the hope that it will be useful, 8a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * but WITHOUT ANY WARRANTY; without even the implied warranty of 9a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * GNU General Public License for more details. 11a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 12a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * You should have received a copy of the GNU General Public License 13a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * along with this program. If not, see <http://www.gnu.org/licenses/>. 14a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka *********************************************************************** 15a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * File: mountns04.c 16a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 17a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * Tests an unbindable mount: unbindable mount is an unbindable 18a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * private mount. 19a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * Description: 20a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 1. Creates directories "A", "B" and files "A/A", "B/B" 21a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 2. Unshares mount namespace and makes it private (so mounts/umounts 22a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * have no effect on a real system) 23a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 3. Bind mounts directory "A" to "A" 24a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 4. Makes directory directory "A" unbindable 25a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * 5. Tries to bind mount unbindable "A" to "B": 26a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * - if it fails, test passes 27a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka * - if it passes, test fails 28a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka ***********************************************************************/ 29a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 30a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#define _GNU_SOURCE 31a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include <sys/wait.h> 32a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include <sys/mount.h> 33a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include <stdio.h> 34a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include <errno.h> 35a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include "test.h" 36a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include "libclone.h" 37a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include "safe_macros.h" 38a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#include "mountns_helper.h" 39a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 40a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 41a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefkachar *TCID = "mountns04"; 42a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefkaint TST_TOTAL = 1; 43a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 44a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 45a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#if defined(MS_SHARED) && defined(MS_PRIVATE) \ 46a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka && defined(MS_REC) && defined(MS_UNBINDABLE) 47a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 48a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefkastatic void test(void) 49a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka{ 50a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka /* unshares the mount ns */ 51a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka if (unshare(CLONE_NEWNS) == -1) 52a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka tst_brkm(TBROK | TERRNO, cleanup, "unshare failed"); 53a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka /* makes sure mounts/umounts have no effect on a real system */ 54a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka SAFE_MOUNT(cleanup, "none", "/", "none", MS_REC|MS_PRIVATE, NULL); 55a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 56a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka /* bind mounts DIRA to itself */ 57a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka SAFE_MOUNT(cleanup, DIRA, DIRA, "none", MS_BIND, NULL); 58a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka /* makes mount DIRA unbindable */ 59a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka SAFE_MOUNT(cleanup, "none", DIRA, "none", MS_UNBINDABLE, NULL); 60a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 61a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka /* tries to bind mount unbindable DIRA to DIRB which should fail */ 62a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka if (mount(DIRA, DIRB, "none", MS_BIND, NULL) == -1) { 63a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka tst_resm(TPASS, "unbindable mount passed"); 64a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka } else { 65a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka SAFE_UMOUNT(cleanup, DIRB); 66a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka tst_resm(TFAIL, "unbindable mount faled"); 67a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka } 68a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 69a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka SAFE_UMOUNT(cleanup, DIRA); 70a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka} 71a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 72a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefkaint main(int argc, char *argv[]) 73a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka{ 74a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka int lc; 75a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 76d6d11d08678aac1ed2c370ea8e42e5f45aea07beCyril Hrubis tst_parse_opts(argc, argv, NULL, NULL); 77a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 78a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka setup(); 79a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 80a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka for (lc = 0; TEST_LOOPING(lc); lc++) 81a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka test(); 82a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 83a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka cleanup(); 84a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka tst_exit(); 85a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka} 86a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka 87a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#else 88a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefkaint main(void) 89a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka{ 90a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka tst_brkm(TCONF, NULL, "needed mountflags are not defined"); 91a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka} 92a201bcf1050c6a0ddc7d306403b3b5b1cb11a42bMatus Marhefka#endif 93