1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2019 The FreeBSD Foundation 5 * 6 * This software was developed by BFF Storage Systems, LLC under sponsorship 7 * from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 extern "C" { 34 #include <sys/param.h> 35 #include <sys/mount.h> 36 #include <sys/uio.h> 37 38 #include "mntopts.h" // for build_iovec 39 } 40 41 #include "mockfs.hh" 42 #include "utils.hh" 43 44 using namespace testing; 45 46 class UpdateOk: public FuseTest, public WithParamInterface<const char*> {}; 47 class UpdateErr: public FuseTest, public WithParamInterface<const char*> {}; 48 49 int mntflag_from_string(const char *s) 50 { 51 if (0 == strcmp("MNT_RDONLY", s)) 52 return MNT_RDONLY; 53 else if (0 == strcmp("MNT_NOEXEC", s)) 54 return MNT_NOEXEC; 55 else if (0 == strcmp("MNT_NOSUID", s)) 56 return MNT_NOSUID; 57 else if (0 == strcmp("MNT_NOATIME", s)) 58 return MNT_NOATIME; 59 else if (0 == strcmp("MNT_SUIDDIR", s)) 60 return MNT_SUIDDIR; 61 else if (0 == strcmp("MNT_USER", s)) 62 return MNT_USER; 63 else 64 return 0; 65 } 66 67 /* Some mount options can be changed by mount -u */ 68 TEST_P(UpdateOk, update) 69 { 70 struct statfs statbuf; 71 struct iovec *iov = NULL; 72 int iovlen = 0; 73 int flag; 74 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 75 76 flag = mntflag_from_string(GetParam()); 77 if (flag == MNT_NOSUID && 0 != geteuid()) 78 GTEST_SKIP() << "Only root may clear MNT_NOSUID"; 79 if (flag == MNT_SUIDDIR && 0 != geteuid()) 80 GTEST_SKIP() << "Only root may set MNT_SUIDDIR"; 81 82 EXPECT_CALL(*m_mock, process( 83 ResultOf([](auto in) { 84 return (in.header.opcode == FUSE_STATFS); 85 }, Eq(true)), 86 _) 87 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 88 /* 89 * All of the fields except f_flags are don't care, and f_flags is set by 90 * the VFS 91 */ 92 SET_OUT_HEADER_LEN(out, statfs); 93 }))); 94 95 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 96 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 97 98 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 99 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 100 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 101 ASSERT_EQ(0, nmount(iov, iovlen, newflags)) << strerror(errno); 102 103 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 104 EXPECT_FALSE((newflags ^ statbuf.f_flags) & flag); 105 } 106 107 /* Some mount options cannnot be changed by mount -u */ 108 TEST_P(UpdateErr, update) 109 { 110 struct statfs statbuf; 111 struct iovec *iov = NULL; 112 int iovlen = 0; 113 int flag; 114 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 115 116 flag = mntflag_from_string(GetParam()); 117 EXPECT_CALL(*m_mock, process( 118 ResultOf([](auto in) { 119 return (in.header.opcode == FUSE_STATFS); 120 }, Eq(true)), 121 _) 122 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 123 /* 124 * All of the fields except f_flags are don't care, and f_flags is set by 125 * the VFS 126 */ 127 SET_OUT_HEADER_LEN(out, statfs); 128 }))); 129 130 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 131 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 132 133 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 134 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 135 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 136 /* 137 * Don't check nmount's return value, because vfs_domount may "fix" the 138 * options for us. The important thing is to check the final value of 139 * statbuf.f_flags below. 140 */ 141 (void)nmount(iov, iovlen, newflags); 142 143 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 144 EXPECT_TRUE((newflags ^ statbuf.f_flags) & flag); 145 } 146 147 INSTANTIATE_TEST_CASE_P(Mount, UpdateOk, 148 ::testing::Values("MNT_RDONLY", "MNT_NOEXEC", "MNT_NOSUID", "MNT_NOATIME", 149 "MNT_SUIDDIR") 150 ); 151 152 INSTANTIATE_TEST_CASE_P(Mount, UpdateErr, 153 ::testing::Values( "MNT_USER"); 154 ); 155