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: stable/12/tests/sys/fs/fusefs/symlink.cc 372422 2022-08-20 02:57:37Z asomers $
31 */
32
33 extern "C" {
34 #include <unistd.h>
35 }
36
37 #include "mockfs.hh"
38 #include "utils.hh"
39
40 using namespace testing;
41
42 class Symlink: public FuseTest {
43 public:
44
expect_symlink(uint64_t ino,const char * target,const char * relpath)45 void expect_symlink(uint64_t ino, const char *target, const char *relpath)
46 {
47 EXPECT_CALL(*m_mock, process(
48 ResultOf([=](auto in) {
49 const char *name = (const char*)in.body.bytes;
50 const char *linkname = name + strlen(name) + 1;
51 return (in.header.opcode == FUSE_SYMLINK &&
52 (0 == strcmp(linkname, target)) &&
53 (0 == strcmp(name, relpath)));
54 }, Eq(true)),
55 _)
56 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) {
57 SET_OUT_HEADER_LEN(out, entry);
58 out.body.entry.attr.mode = S_IFLNK | 0777;
59 out.body.entry.nodeid = ino;
60 out.body.entry.entry_valid = UINT64_MAX;
61 out.body.entry.attr_valid = UINT64_MAX;
62 })));
63 }
64
65 };
66
67 class Symlink_7_8: public FuseTest {
68 public:
SetUp()69 virtual void SetUp() {
70 m_kernel_minor_version = 8;
71 FuseTest::SetUp();
72 }
73
expect_symlink(uint64_t ino,const char * target,const char * relpath)74 void expect_symlink(uint64_t ino, const char *target, const char *relpath)
75 {
76 EXPECT_CALL(*m_mock, process(
77 ResultOf([=](auto in) {
78 const char *name = (const char*)in.body.bytes;
79 const char *linkname = name + strlen(name) + 1;
80 return (in.header.opcode == FUSE_SYMLINK &&
81 (0 == strcmp(linkname, target)) &&
82 (0 == strcmp(name, relpath)));
83 }, Eq(true)),
84 _)
85 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) {
86 SET_OUT_HEADER_LEN(out, entry_7_8);
87 out.body.entry.attr.mode = S_IFLNK | 0777;
88 out.body.entry.nodeid = ino;
89 out.body.entry.entry_valid = UINT64_MAX;
90 out.body.entry.attr_valid = UINT64_MAX;
91 })));
92 }
93
94 };
95
96 /*
97 * A successful symlink should clear the parent directory's attribute cache,
98 * because the fuse daemon should update its mtime and ctime
99 */
TEST_F(Symlink,clear_attr_cache)100 TEST_F(Symlink, clear_attr_cache)
101 {
102 const char FULLPATH[] = "mountpoint/src";
103 const char RELPATH[] = "src";
104 const char dst[] = "dst";
105 const uint64_t ino = 42;
106 struct stat sb;
107
108 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
109 .WillOnce(Invoke(ReturnErrno(ENOENT)));
110 EXPECT_CALL(*m_mock, process(
111 ResultOf([=](auto in) {
112 return (in.header.opcode == FUSE_GETATTR &&
113 in.header.nodeid == FUSE_ROOT_ID);
114 }, Eq(true)),
115 _)
116 ).Times(2)
117 .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) {
118 SET_OUT_HEADER_LEN(out, attr);
119 out.body.attr.attr.ino = FUSE_ROOT_ID;
120 out.body.attr.attr.mode = S_IFDIR | 0755;
121 out.body.attr.attr_valid = UINT64_MAX;
122 })));
123 expect_symlink(ino, dst, RELPATH);
124
125 EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
126 EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
127 EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
128 }
129
TEST_F(Symlink,enospc)130 TEST_F(Symlink, enospc)
131 {
132 const char FULLPATH[] = "mountpoint/lnk";
133 const char RELPATH[] = "lnk";
134 const char dst[] = "dst";
135
136 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
137 .WillOnce(Invoke(ReturnErrno(ENOENT)));
138
139 EXPECT_CALL(*m_mock, process(
140 ResultOf([=](auto in) {
141 const char *name = (const char*)in.body.bytes;
142 const char *linkname = name + strlen(name) + 1;
143 return (in.header.opcode == FUSE_SYMLINK &&
144 (0 == strcmp(linkname, dst)) &&
145 (0 == strcmp(name, RELPATH)));
146 }, Eq(true)),
147 _)
148 ).WillOnce(Invoke(ReturnErrno(ENOSPC)));
149
150 EXPECT_EQ(-1, symlink(dst, FULLPATH));
151 EXPECT_EQ(ENOSPC, errno);
152 }
153
TEST_F(Symlink,ok)154 TEST_F(Symlink, ok)
155 {
156 const char FULLPATH[] = "mountpoint/src";
157 const char RELPATH[] = "src";
158 const char dst[] = "dst";
159 const uint64_t ino = 42;
160
161 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
162 .WillOnce(Invoke(ReturnErrno(ENOENT)));
163 expect_symlink(ino, dst, RELPATH);
164
165 EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
166 }
167
168 /*
169 * Nothing bad should happen if the server returns the parent's inode number
170 * for the newly created symlink. Regression test for bug 263662.
171 * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263662
172 */
TEST_F(Symlink,parent_ino)173 TEST_F(Symlink, parent_ino)
174 {
175 const char FULLPATH[] = "mountpoint/parent/src";
176 const char PPATH[] = "parent";
177 const char RELPATH[] = "src";
178 const char dst[] = "dst";
179 const uint64_t ino = 42;
180
181 expect_lookup(PPATH, ino, S_IFDIR | 0755, 0, 1);
182 EXPECT_LOOKUP(ino, RELPATH)
183 .WillOnce(Invoke(ReturnErrno(ENOENT)));
184 expect_symlink(ino, dst, RELPATH);
185
186 EXPECT_EQ(-1, symlink(dst, FULLPATH));
187 EXPECT_EQ(EIO, errno);
188 }
189
TEST_F(Symlink_7_8,ok)190 TEST_F(Symlink_7_8, ok)
191 {
192 const char FULLPATH[] = "mountpoint/src";
193 const char RELPATH[] = "src";
194 const char dst[] = "dst";
195 const uint64_t ino = 42;
196
197 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
198 .WillOnce(Invoke(ReturnErrno(ENOENT)));
199 expect_symlink(ino, dst, RELPATH);
200
201 EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
202 }
203