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
36 #include <unistd.h>
37 }
38
39 #include "mockfs.hh"
40 #include "utils.hh"
41
42 using namespace testing;
43
44 class Readlink: public FuseTest {
45 public:
expect_lookup(const char * relpath,uint64_t ino)46 void expect_lookup(const char *relpath, uint64_t ino)
47 {
48 FuseTest::expect_lookup(relpath, ino, S_IFLNK | 0777, 0, 1);
49 }
expect_readlink(uint64_t ino,ProcessMockerT r)50 void expect_readlink(uint64_t ino, ProcessMockerT r)
51 {
52 EXPECT_CALL(*m_mock, process(
53 ResultOf([=](auto in) {
54 return (in.header.opcode == FUSE_READLINK &&
55 in.header.nodeid == ino);
56 }, Eq(true)),
57 _)
58 ).WillOnce(Invoke(r));
59 }
60
61 };
62
63 class PushSymlinksIn: public Readlink {
SetUp()64 virtual void SetUp() {
65 m_push_symlinks_in = true;
66 Readlink::SetUp();
67 }
68 };
69
TEST_F(Readlink,eloop)70 TEST_F(Readlink, eloop)
71 {
72 const char FULLPATH[] = "mountpoint/src";
73 const char RELPATH[] = "src";
74 const uint64_t ino = 42;
75 char buf[80];
76
77 expect_lookup(RELPATH, ino);
78 expect_readlink(ino, ReturnErrno(ELOOP));
79
80 EXPECT_EQ(-1, readlink(FULLPATH, buf, sizeof(buf)));
81 EXPECT_EQ(ELOOP, errno);
82 }
83
TEST_F(Readlink,ok)84 TEST_F(Readlink, ok)
85 {
86 const char FULLPATH[] = "mountpoint/src";
87 const char RELPATH[] = "src";
88 const char dst[] = "dst";
89 const uint64_t ino = 42;
90 char buf[80];
91
92 expect_lookup(RELPATH, ino);
93 expect_readlink(ino, ReturnImmediate([=](auto in __unused, auto& out) {
94 strlcpy(out.body.str, dst, sizeof(out.body.str));
95 out.header.len = sizeof(out.header) + strlen(dst) + 1;
96 }));
97
98 EXPECT_EQ(static_cast<ssize_t>(strlen(dst)) + 1,
99 readlink(FULLPATH, buf, sizeof(buf)));
100 EXPECT_STREQ(dst, buf);
101 }
102
TEST_F(PushSymlinksIn,readlink)103 TEST_F(PushSymlinksIn, readlink)
104 {
105 const char FULLPATH[] = "mountpoint/src";
106 const char RELPATH[] = "src";
107 const char dst[] = "/dst";
108 const uint64_t ino = 42;
109 char buf[MAXPATHLEN], wd[MAXPATHLEN], want[MAXPATHLEN];
110 int len;
111
112 expect_lookup(RELPATH, ino);
113 expect_readlink(ino, ReturnImmediate([=](auto in __unused, auto& out) {
114 strlcpy(out.body.str, dst, sizeof(out.body.str));
115 out.header.len = sizeof(out.header) + strlen(dst) + 1;
116 }));
117
118 ASSERT_NE(nullptr, getcwd(wd, sizeof(wd))) << strerror(errno);
119 len = snprintf(want, sizeof(want), "%s/mountpoint%s", wd, dst);
120 ASSERT_LE(0, len) << strerror(errno);
121
122 EXPECT_EQ(static_cast<ssize_t>(len) + 1,
123 readlink(FULLPATH, buf, sizeof(buf)));
124 EXPECT_STREQ(want, buf);
125 }
126