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 Mount: public FuseTest { 47 public: 48 void expect_statfs() { 49 EXPECT_CALL(*m_mock, process( 50 ResultOf([](auto in) { 51 return (in.header.opcode == FUSE_STATFS); 52 }, Eq(true)), 53 _) 54 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 55 SET_OUT_HEADER_LEN(out, statfs); 56 }))); 57 } 58 }; 59 60 class Fsname: public Mount { 61 void SetUp() { 62 m_fsname = "http://something"; 63 Mount::SetUp(); 64 } 65 }; 66 67 class Subtype: public Mount { 68 void SetUp() { 69 m_subtype = "myfs"; 70 Mount::SetUp(); 71 } 72 }; 73 74 class UpdateOk: public Mount, public WithParamInterface<const char*> {}; 75 class UpdateErr: public Mount, public WithParamInterface<const char*> {}; 76 77 int mntflag_from_string(const char *s) 78 { 79 if (0 == strcmp("MNT_RDONLY", s)) 80 return MNT_RDONLY; 81 else if (0 == strcmp("MNT_NOEXEC", s)) 82 return MNT_NOEXEC; 83 else if (0 == strcmp("MNT_NOSUID", s)) 84 return MNT_NOSUID; 85 else if (0 == strcmp("MNT_NOATIME", s)) 86 return MNT_NOATIME; 87 else if (0 == strcmp("MNT_SUIDDIR", s)) 88 return MNT_SUIDDIR; 89 else if (0 == strcmp("MNT_USER", s)) 90 return MNT_USER; 91 else 92 return 0; 93 } 94 95 TEST_F(Fsname, fsname) 96 { 97 struct statfs statbuf; 98 99 expect_statfs(); 100 101 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 102 ASSERT_STREQ("http://something", statbuf.f_mntfromname); 103 } 104 105 TEST_F(Subtype, subtype) 106 { 107 struct statfs statbuf; 108 109 expect_statfs(); 110 111 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 112 ASSERT_STREQ("fusefs.myfs", statbuf.f_fstypename); 113 } 114 115 /* Some mount options can be changed by mount -u */ 116 TEST_P(UpdateOk, update) 117 { 118 struct statfs statbuf; 119 struct iovec *iov = NULL; 120 int iovlen = 0; 121 int flag; 122 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 123 124 flag = mntflag_from_string(GetParam()); 125 if (flag == MNT_NOSUID && 0 != geteuid()) 126 GTEST_SKIP() << "Only root may clear MNT_NOSUID"; 127 if (flag == MNT_SUIDDIR && 0 != geteuid()) 128 GTEST_SKIP() << "Only root may set MNT_SUIDDIR"; 129 130 EXPECT_CALL(*m_mock, process( 131 ResultOf([](auto in) { 132 return (in.header.opcode == FUSE_STATFS); 133 }, Eq(true)), 134 _) 135 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 136 /* 137 * All of the fields except f_flags are don't care, and f_flags is set by 138 * the VFS 139 */ 140 SET_OUT_HEADER_LEN(out, statfs); 141 }))); 142 143 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 144 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 145 146 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 147 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 148 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 149 ASSERT_EQ(0, nmount(iov, iovlen, newflags)) << strerror(errno); 150 151 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 152 EXPECT_FALSE((newflags ^ statbuf.f_flags) & flag); 153 } 154 155 /* Some mount options cannnot be changed by mount -u */ 156 TEST_P(UpdateErr, update) 157 { 158 struct statfs statbuf; 159 struct iovec *iov = NULL; 160 int iovlen = 0; 161 int flag; 162 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 163 164 flag = mntflag_from_string(GetParam()); 165 EXPECT_CALL(*m_mock, process( 166 ResultOf([](auto in) { 167 return (in.header.opcode == FUSE_STATFS); 168 }, Eq(true)), 169 _) 170 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 171 /* 172 * All of the fields except f_flags are don't care, and f_flags is set by 173 * the VFS 174 */ 175 SET_OUT_HEADER_LEN(out, statfs); 176 }))); 177 178 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 179 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 180 181 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 182 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 183 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 184 /* 185 * Don't check nmount's return value, because vfs_domount may "fix" the 186 * options for us. The important thing is to check the final value of 187 * statbuf.f_flags below. 188 */ 189 (void)nmount(iov, iovlen, newflags); 190 191 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 192 EXPECT_TRUE((newflags ^ statbuf.f_flags) & flag); 193 } 194 195 INSTANTIATE_TEST_CASE_P(Mount, UpdateOk, 196 ::testing::Values("MNT_RDONLY", "MNT_NOEXEC", "MNT_NOSUID", "MNT_NOATIME", 197 "MNT_SUIDDIR") 198 ); 199 200 INSTANTIATE_TEST_CASE_P(Mount, UpdateErr, 201 ::testing::Values( "MNT_USER"); 202 ); 203