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 extern "C" {
32 #include <semaphore.h>
33 #include <unistd.h>
34 }
35
36 #include "mockfs.hh"
37 #include "utils.hh"
38
39 using namespace testing;
40
41 class Symlink: public FuseTest {
42 public:
43
expect_symlink(uint64_t ino,const char * target,const char * relpath)44 void expect_symlink(uint64_t ino, const char *target, const char *relpath)
45 {
46 EXPECT_CALL(*m_mock, process(
47 ResultOf([=](auto in) {
48 const char *name = (const char*)in.body.bytes;
49 const char *linkname = name + strlen(name) + 1;
50 return (in.header.opcode == FUSE_SYMLINK &&
51 (0 == strcmp(linkname, target)) &&
52 (0 == strcmp(name, relpath)));
53 }, Eq(true)),
54 _)
55 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) {
56 SET_OUT_HEADER_LEN(out, entry);
57 out.body.entry.attr.mode = S_IFLNK | 0777;
58 out.body.entry.nodeid = ino;
59 out.body.entry.entry_valid = UINT64_MAX;
60 out.body.entry.attr_valid = UINT64_MAX;
61 })));
62 }
63
64 };
65
66 class Symlink_7_8: public FuseTest {
67 public:
SetUp()68 virtual void SetUp() {
69 m_kernel_minor_version = 8;
70 FuseTest::SetUp();
71 }
72
expect_symlink(uint64_t ino,const char * target,const char * relpath)73 void expect_symlink(uint64_t ino, const char *target, const char *relpath)
74 {
75 EXPECT_CALL(*m_mock, process(
76 ResultOf([=](auto in) {
77 const char *name = (const char*)in.body.bytes;
78 const char *linkname = name + strlen(name) + 1;
79 return (in.header.opcode == FUSE_SYMLINK &&
80 (0 == strcmp(linkname, target)) &&
81 (0 == strcmp(name, relpath)));
82 }, Eq(true)),
83 _)
84 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) {
85 SET_OUT_HEADER_LEN(out, entry_7_8);
86 out.body.entry.attr.mode = S_IFLNK | 0777;
87 out.body.entry.nodeid = ino;
88 out.body.entry.entry_valid = UINT64_MAX;
89 out.body.entry.attr_valid = UINT64_MAX;
90 })));
91 }
92
93 };
94
95 /*
96 * A successful symlink should clear the parent directory's attribute cache,
97 * because the fuse daemon should update its mtime and ctime
98 */
TEST_F(Symlink,clear_attr_cache)99 TEST_F(Symlink, clear_attr_cache)
100 {
101 const char FULLPATH[] = "mountpoint/src";
102 const char RELPATH[] = "src";
103 const char dst[] = "dst";
104 const uint64_t ino = 42;
105 struct stat sb;
106
107 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
108 .WillOnce(Invoke(ReturnErrno(ENOENT)));
109 EXPECT_CALL(*m_mock, process(
110 ResultOf([=](auto in) {
111 return (in.header.opcode == FUSE_GETATTR &&
112 in.header.nodeid == FUSE_ROOT_ID);
113 }, Eq(true)),
114 _)
115 ).Times(2)
116 .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) {
117 SET_OUT_HEADER_LEN(out, attr);
118 out.body.attr.attr.ino = FUSE_ROOT_ID;
119 out.body.attr.attr.mode = S_IFDIR | 0755;
120 out.body.attr.attr_valid = UINT64_MAX;
121 })));
122 expect_symlink(ino, dst, RELPATH);
123
124 EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
125 EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
126 EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno);
127 }
128
TEST_F(Symlink,enospc)129 TEST_F(Symlink, enospc)
130 {
131 const char FULLPATH[] = "mountpoint/lnk";
132 const char RELPATH[] = "lnk";
133 const char dst[] = "dst";
134
135 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
136 .WillOnce(Invoke(ReturnErrno(ENOENT)));
137
138 EXPECT_CALL(*m_mock, process(
139 ResultOf([=](auto in) {
140 const char *name = (const char*)in.body.bytes;
141 const char *linkname = name + strlen(name) + 1;
142 return (in.header.opcode == FUSE_SYMLINK &&
143 (0 == strcmp(linkname, dst)) &&
144 (0 == strcmp(name, RELPATH)));
145 }, Eq(true)),
146 _)
147 ).WillOnce(Invoke(ReturnErrno(ENOSPC)));
148
149 EXPECT_EQ(-1, symlink(dst, FULLPATH));
150 EXPECT_EQ(ENOSPC, errno);
151 }
152
TEST_F(Symlink,ok)153 TEST_F(Symlink, ok)
154 {
155 const char FULLPATH[] = "mountpoint/src";
156 const char RELPATH[] = "src";
157 const char dst[] = "dst";
158 const uint64_t ino = 42;
159
160 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
161 .WillOnce(Invoke(ReturnErrno(ENOENT)));
162 expect_symlink(ino, dst, RELPATH);
163
164 EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
165 }
166
167 /*
168 * Nothing bad should happen if the server returns the parent's inode number
169 * for the newly created symlink. Regression test for bug 263662.
170 * https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263662
171 */
TEST_F(Symlink,parent_ino)172 TEST_F(Symlink, parent_ino)
173 {
174 const char FULLPATH[] = "mountpoint/parent/src";
175 const char PPATH[] = "parent";
176 const char RELPATH[] = "src";
177 const char dst[] = "dst";
178 sem_t sem;
179 const uint64_t ino = 42;
180
181 ASSERT_EQ(0, sem_init(&sem, 0, 0)) << strerror(errno);
182
183 expect_lookup(PPATH, ino, S_IFDIR | 0755, 0, 1);
184 EXPECT_LOOKUP(ino, RELPATH)
185 .WillOnce(Invoke(ReturnErrno(ENOENT)));
186 expect_symlink(ino, dst, RELPATH);
187 expect_forget(ino, 1, &sem);
188
189 EXPECT_EQ(-1, symlink(dst, FULLPATH));
190 EXPECT_EQ(EIO, errno);
191
192 sem_wait(&sem);
193 sem_destroy(&sem);
194 }
195
TEST_F(Symlink_7_8,ok)196 TEST_F(Symlink_7_8, ok)
197 {
198 const char FULLPATH[] = "mountpoint/src";
199 const char RELPATH[] = "src";
200 const char dst[] = "dst";
201 const uint64_t ino = 42;
202
203 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH)
204 .WillOnce(Invoke(ReturnErrno(ENOENT)));
205 expect_symlink(ino, dst, RELPATH);
206
207 EXPECT_EQ(0, symlink(dst, FULLPATH)) << strerror(errno);
208 }
209