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 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 UpdateOk: public FuseTest, public WithParamInterface<const char*> {}; 45 class UpdateErr: public FuseTest, public WithParamInterface<const char*> {}; 46 47 int mntflag_from_string(const char *s) 48 { 49 if (0 == strcmp("MNT_RDONLY", s)) 50 return MNT_RDONLY; 51 else if (0 == strcmp("MNT_NOEXEC", s)) 52 return MNT_NOEXEC; 53 else if (0 == strcmp("MNT_NOSUID", s)) 54 return MNT_NOSUID; 55 else if (0 == strcmp("MNT_NOATIME", s)) 56 return MNT_NOATIME; 57 else if (0 == strcmp("MNT_SUIDDIR", s)) 58 return MNT_SUIDDIR; 59 else if (0 == strcmp("MNT_USER", s)) 60 return MNT_USER; 61 else 62 return 0; 63 } 64 65 /* Some mount options can be changed by mount -u */ 66 TEST_P(UpdateOk, update) 67 { 68 struct statfs statbuf; 69 struct iovec *iov = NULL; 70 int iovlen = 0; 71 int flag; 72 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 73 74 flag = mntflag_from_string(GetParam()); 75 if (flag == MNT_NOSUID && 0 != geteuid()) 76 GTEST_SKIP() << "Only root may clear MNT_NOSUID"; 77 if (flag == MNT_SUIDDIR && 0 != geteuid()) 78 GTEST_SKIP() << "Only root may set MNT_SUIDDIR"; 79 80 EXPECT_CALL(*m_mock, process( 81 ResultOf([](auto in) { 82 return (in.header.opcode == FUSE_STATFS); 83 }, Eq(true)), 84 _) 85 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 86 /* 87 * All of the fields except f_flags are don't care, and f_flags is set by 88 * the VFS 89 */ 90 SET_OUT_HEADER_LEN(out, statfs); 91 }))); 92 93 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 94 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 95 96 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 97 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 98 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 99 ASSERT_EQ(0, nmount(iov, iovlen, newflags)) << strerror(errno); 100 101 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 102 EXPECT_FALSE((newflags ^ statbuf.f_flags) & flag); 103 } 104 105 /* Some mount options cannnot be changed by mount -u */ 106 TEST_P(UpdateErr, update) 107 { 108 struct statfs statbuf; 109 struct iovec *iov = NULL; 110 int iovlen = 0; 111 int flag; 112 int newflags = MNT_UPDATE | MNT_SYNCHRONOUS; 113 114 flag = mntflag_from_string(GetParam()); 115 EXPECT_CALL(*m_mock, process( 116 ResultOf([](auto in) { 117 return (in.header.opcode == FUSE_STATFS); 118 }, Eq(true)), 119 _) 120 ).WillRepeatedly(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 121 /* 122 * All of the fields except f_flags are don't care, and f_flags is set by 123 * the VFS 124 */ 125 SET_OUT_HEADER_LEN(out, statfs); 126 }))); 127 128 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 129 newflags = (statbuf.f_flags | MNT_UPDATE) ^ flag; 130 131 build_iovec(&iov, &iovlen, "fstype", (void*)statbuf.f_fstypename, -1); 132 build_iovec(&iov, &iovlen, "fspath", (void*)statbuf.f_mntonname, -1); 133 build_iovec(&iov, &iovlen, "from", __DECONST(void *, "/dev/fuse"), -1); 134 /* 135 * Don't check nmount's return value, because vfs_domount may "fix" the 136 * options for us. The important thing is to check the final value of 137 * statbuf.f_flags below. 138 */ 139 (void)nmount(iov, iovlen, newflags); 140 141 ASSERT_EQ(0, statfs("mountpoint", &statbuf)) << strerror(errno); 142 EXPECT_TRUE((newflags ^ statbuf.f_flags) & flag); 143 } 144 145 INSTANTIATE_TEST_CASE_P(Mount, UpdateOk, 146 ::testing::Values("MNT_RDONLY", "MNT_NOEXEC", "MNT_NOSUID", "MNT_NOATIME", 147 "MNT_SUIDDIR") 148 ); 149 150 INSTANTIATE_TEST_CASE_P(Mount, UpdateErr, 151 ::testing::Values( "MNT_USER"); 152 ); 153