xref: /freebsd/tests/sys/fs/fusefs/default_permissions_privileged.cc (revision 5ca8e32633c4ffbbcd6762e5888b6a4ba0708c6c)
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 /*
32  * Tests for the "default_permissions" mount option that require a privileged
33  * user.
34  */
35 
36 extern "C" {
37 #include <sys/types.h>
38 #include <sys/extattr.h>
39 
40 #include <fcntl.h>
41 #include <unistd.h>
42 }
43 
44 #include "mockfs.hh"
45 #include "utils.hh"
46 
47 using namespace testing;
48 
49 class DefaultPermissionsPrivileged: public FuseTest {
50 virtual void SetUp() {
51 	m_default_permissions = true;
52 	FuseTest::SetUp();
53 	if (HasFatalFailure() || IsSkipped())
54 		return;
55 
56 	if (geteuid() != 0) {
57 		GTEST_SKIP() << "This test requires a privileged user";
58 	}
59 
60 	/* With -o default_permissions, FUSE_ACCESS should never be called */
61 	EXPECT_CALL(*m_mock, process(
62 		ResultOf([=](auto in) {
63 			return (in.header.opcode == FUSE_ACCESS);
64 		}, Eq(true)),
65 		_)
66 	).Times(0);
67 }
68 
69 public:
70 void expect_getattr(uint64_t ino, mode_t mode, uint64_t attr_valid, int times,
71 	uid_t uid = 0, gid_t gid = 0)
72 {
73 	EXPECT_CALL(*m_mock, process(
74 		ResultOf([=](auto in) {
75 			return (in.header.opcode == FUSE_GETATTR &&
76 				in.header.nodeid == ino);
77 		}, Eq(true)),
78 		_)
79 	).Times(times)
80 	.WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) {
81 		SET_OUT_HEADER_LEN(out, attr);
82 		out.body.attr.attr.ino = ino;	// Must match nodeid
83 		out.body.attr.attr.mode = mode;
84 		out.body.attr.attr.size = 0;
85 		out.body.attr.attr.uid = uid;
86 		out.body.attr.attr.gid = gid;
87 		out.body.attr.attr_valid = attr_valid;
88 	})));
89 }
90 
91 void expect_lookup(const char *relpath, uint64_t ino, mode_t mode,
92 	uint64_t attr_valid, uid_t uid = 0, gid_t gid = 0)
93 {
94 	FuseTest::expect_lookup(relpath, ino, mode, 0, 1, attr_valid, uid, gid);
95 }
96 
97 };
98 
99 class Setattr: public DefaultPermissionsPrivileged {};
100 
101 TEST_F(Setattr, sticky_regular_file)
102 {
103 	const char FULLPATH[] = "mountpoint/some_file.txt";
104 	const char RELPATH[] = "some_file.txt";
105 	const uint64_t ino = 42;
106 	const mode_t oldmode = 0644;
107 	const mode_t newmode = 01644;
108 
109 	expect_getattr(1, S_IFDIR | 0755, UINT64_MAX, 1);
110 	expect_lookup(RELPATH, ino, S_IFREG | oldmode, UINT64_MAX, geteuid());
111 	EXPECT_CALL(*m_mock, process(
112 		ResultOf([](auto in) {
113 			return (in.header.opcode == FUSE_SETATTR);
114 		}, Eq(true)),
115 		_)
116 	).WillOnce(Invoke(ReturnImmediate([](auto in __unused, auto& out) {
117 		SET_OUT_HEADER_LEN(out, attr);
118 		out.body.attr.attr.mode = S_IFREG | newmode;
119 	})));
120 
121 	EXPECT_EQ(0, chmod(FULLPATH, newmode)) << strerror(errno);
122 }
123 
124 
125