/* $NetBSD: t_rwtoro.c,v 1.1 2017/01/27 10:45:11 hannken Exp $ */ /*- * Copyright (c) 2017 The NetBSD Foundation, Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../common/h_fsmacros.h" #include "../../h_macros.h" static const char *unsupported = "fs does not support r/o remount"; static char file_path[MAXPATHLEN]; static int file_fd; /* * Remount the filesystem read-only and test errno. * Skip filesystems that don't implement read-write -> read-only. */ static void remount_ro(const atf_tc_t *tc, const char *mp, int expected_errno) { int error; union { struct tmpfs_args tmpfs; char data[4095]; } mount_args; int mount_args_length; struct statvfs sbuf; if (FSTYPE_ZFS(tc)) atf_tc_skip("%s", unsupported); /* Prepare mount arguments. */ RL(rump_sys_statvfs1(mp, &sbuf, ST_WAIT)); mount_args_length = sizeof(mount_args); memset(&mount_args, 0, mount_args_length); if (FSTYPE_TMPFS(tc)) mount_args.tmpfs.ta_version = TMPFS_ARGS_VERSION; mount_args_length = rump_sys_mount(sbuf.f_fstypename, mp, MNT_GETARGS, &mount_args, mount_args_length); ATF_CHECK(mount_args_length >= 0); /* Remount and test result. */ error = rump_sys_mount(sbuf.f_fstypename, mp, MNT_UPDATE | MNT_RDONLY, &mount_args, mount_args_length); if (errno == EOPNOTSUPP) atf_tc_skip("%s", unsupported); if (expected_errno == 0) ATF_CHECK(error == 0); else ATF_CHECK_ERRNO(expected_errno, error == -1); } static void open_file_ro(const char *prefix) { snprintf(file_path, sizeof(file_path), "%s/file", prefix); RL(file_fd = rump_sys_open(file_path, O_CREAT | O_RDWR, 0777)); RL(rump_sys_close(file_fd)); RL(file_fd = rump_sys_open(file_path, O_RDONLY)); } static void open_file_ro_unlink(const char *prefix) { snprintf(file_path, sizeof(file_path), "%s/file", prefix); RL(file_fd = rump_sys_open(file_path, O_CREAT | O_RDWR, 0777)); RL(rump_sys_close(file_fd)); RL(file_fd = rump_sys_open(file_path, O_RDONLY)); RL(rump_sys_unlink(file_path)); } static void open_file_rw(const char *prefix) { snprintf(file_path, sizeof(file_path), "%s/file", prefix); RL(file_fd = rump_sys_open(file_path, O_CREAT | O_RDWR, 0777)); } static void close_file(const char *unused) { RL(rump_sys_close(file_fd)); } static void basic_test(const atf_tc_t *tc, const char *mp, int expected_errno, bool use_layer, void (*pre)(const char *), void (*post)(const char *)) { const char *null_mount = "/nullm"; struct null_args nargs; if (use_layer) { RL(rump_sys_mkdir(null_mount, 0777)); memset(&nargs, 0, sizeof(nargs)); nargs.nulla_target = __UNCONST(mp);; RL(rump_sys_mount(MOUNT_NULL, null_mount, 0, &nargs, sizeof(nargs))); } if (pre) (*pre)(use_layer ? null_mount : mp); remount_ro(tc, mp, expected_errno); if (post) (*post)(use_layer ? null_mount : mp); if (use_layer) RL(rump_sys_unmount(null_mount, 0)); } static void noneopen(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, 0, false, NULL, NULL); } static void readopen(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, 0, false, open_file_ro, close_file); } static void writeopen(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, EBUSY, false, open_file_rw, close_file); } static void read_unlinked(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, EBUSY, false, open_file_ro_unlink, close_file); } static void layer_noneopen(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, 0, true, NULL, NULL); } static void layer_readopen(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, 0, true, open_file_ro, close_file); } static void layer_writeopen(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, EBUSY, true, open_file_rw, close_file); } static void layer_read_unlinked(const atf_tc_t *tc, const char *mp) { basic_test(tc, mp, EBUSY, true, open_file_ro_unlink, close_file); } ATF_TC_FSAPPLY(noneopen, "remount r/o with no file open"); ATF_TC_FSAPPLY(readopen, "remount r/o with file open for reading"); ATF_TC_FSAPPLY(writeopen, "remount r/o with file open for writing"); ATF_TC_FSAPPLY(read_unlinked, "remount r/o with unlinked file open for reading"); ATF_TC_FSAPPLY(layer_noneopen, "remount r/o with no file open on layer"); ATF_TC_FSAPPLY(layer_readopen, "remount r/o with file open for reading on layer"); ATF_TC_FSAPPLY(layer_writeopen, "remount r/o with file open for writing on layer"); ATF_TC_FSAPPLY(layer_read_unlinked, "remount r/o with unlinked file open for reading on layer"); ATF_TP_ADD_TCS(tp) { ATF_TP_FSAPPLY(noneopen); ATF_TP_FSAPPLY(readopen); ATF_TP_FSAPPLY(writeopen); ATF_TP_FSAPPLY(read_unlinked); ATF_TP_FSAPPLY(layer_noneopen); ATF_TP_FSAPPLY(layer_readopen); ATF_TP_FSAPPLY(layer_writeopen); ATF_TP_FSAPPLY(layer_read_unlinked); return atf_no_error(); }