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
mntflag_from_string(const char * s)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 */
TEST_P(UpdateOk,update)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 */
TEST_P(UpdateErr,update)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