1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 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 31 extern "C" { 32 #include <sys/param.h> 33 #include <sys/mount.h> 34 #include <sys/uio.h> 35 36 #include "mntopts.h" // for build_iovec 37 } 38 39 #include "mockfs.hh" 40 #include "utils.hh" 41 42 using namespace testing; 43 44 class Mount: public FuseTest { 45 public: 46 void expect_statfs() { 47 EXPECT_CALL(*m_mock, process( 48 ResultOf([](auto in) { 49 return (in.header.opcode == FUSE_STATFS); 50 }, Eq(true)), 51 _) 52 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 53 SET_OUT_HEADER_LEN(out, statfs); 54 }))); 55 } 56 }; 57 58 class Fsname: public Mount { 59 void SetUp() { 60 m_fsname = "http://something"; 61 Mount::SetUp(); 62 } 63 }; 64 65 class Subtype: public Mount { 66 void SetUp() { 67 m_subtype = "myfs"; 68 Mount::SetUp(); 69 } 70 }; 71 72 class UpdateOk: public Mount, public WithParamInterface<const char*> {}; 73 class UpdateErr: public Mount, public WithParamInterface<const char*> {}; 74 75 int mntflag_from_string(const char *s) 76 { 77 if (0 == strcmp("MNT_RDONLY", s)) 78 return MNT_RDONLY; 79 else if (0 == strcmp("MNT_NOEXEC", s)) 80 return MNT_NOEXEC; 81 else if (0 == strcmp("MNT_NOSUID", s)) 82 return MNT_NOSUID; 83 else if (0 == strcmp("MNT_NOATIME", s)) 84 return MNT_NOATIME; 85 else if (0 == strcmp("MNT_SUIDDIR", s)) 86 return MNT_SUIDDIR; 87 else if (0 == strcmp("MNT_USER", s)) 88 return MNT_USER; 89 else 90 return 0; 91 } 92 93 TEST_F(Fsname, fsname) 94 { 95 struct statfs statbuf; 96 97 expect_statfs(); 98 99 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 100 ASSERT_STREQ("http://something", statbuf.f_mntfromname); 101 } 102 103 TEST_F(Subtype, subtype) 104 { 105 struct statfs statbuf; 106 107 expect_statfs(); 108 109 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 110 ASSERT_STREQ("fusefs.myfs", statbuf.f_fstypename); 111 } 112 113 /* Some mount options can be changed by mount -u */ 114 TEST_P(UpdateOk, update) 115 { 116 struct statfs statbuf; 117 struct iovec *iov = NULL; 118 int iovlen = 0; 119 int flag; 120 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 121 122 flag = mntflag_from_string(GetParam()); 123 if (flag == MNT_NOSUID && 0 != geteuid()) 124 GTEST_SKIP() << "Only root may clear MNT_NOSUID"; 125 if (flag == MNT_SUIDDIR && 0 != geteuid()) 126 GTEST_SKIP() << "Only root may set MNT_SUIDDIR"; 127 128 EXPECT_CALL(*m_mock, process( 129 ResultOf([](auto in) { 130 return (in.header.opcode == FUSE_STATFS); 131 }, Eq(true)), 132 _) 133 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 134 /* 135 * All of the fields except f_flags are don't care, and f_flags is set by 136 * the VFS 137 */ 138 SET_OUT_HEADER_LEN(out, statfs); 139 }))); 140 141 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 142 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 143 144 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 145 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 146 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 147 ASSERT_EQ(0, nmount(iov, iovlen, newflags)) << strerror(errno); 148 149 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 150 EXPECT_FALSE((newflags ^ statbuf.f_flags) & flag); 151 } 152 153 /* Some mount options cannnot be changed by mount -u */ 154 TEST_P(UpdateErr, update) 155 { 156 struct statfs statbuf; 157 struct iovec *iov = NULL; 158 int iovlen = 0; 159 int flag; 160 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 161 162 flag = mntflag_from_string(GetParam()); 163 EXPECT_CALL(*m_mock, process( 164 ResultOf([](auto in) { 165 return (in.header.opcode == FUSE_STATFS); 166 }, Eq(true)), 167 _) 168 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 169 /* 170 * All of the fields except f_flags are don't care, and f_flags is set by 171 * the VFS 172 */ 173 SET_OUT_HEADER_LEN(out, statfs); 174 }))); 175 176 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 177 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 178 179 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 180 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 181 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 182 /* 183 * Don't check nmount's return value, because vfs_domount may "fix" the 184 * options for us. The important thing is to check the final value of 185 * statbuf.f_flags below. 186 */ 187 (void)nmount(iov, iovlen, newflags); 188 189 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 190 EXPECT_TRUE((newflags ^ statbuf.f_flags) & flag); 191 } 192 193 INSTANTIATE_TEST_SUITE_P(Mount, UpdateOk, 194 ::testing::Values("MNT_RDONLY", "MNT_NOEXEC", "MNT_NOSUID", "MNT_NOATIME", 195 "MNT_SUIDDIR") 196 ); 197 198 INSTANTIATE_TEST_SUITE_P(Mount, UpdateErr, 199 ::testing::Values( "MNT_USER") 200 ); 201