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 * $FreeBSD$ 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 Link: public FuseTest { 43 public: 44 void expect_link(uint64_t ino, const char *relpath, mode_t mode, uint32_t nlink) 45 { 46 EXPECT_CALL(*m_mock, process( 47 ResultOf([=](auto in) { 48 const char *name = (const char*)in.body.bytes 49 + sizeof(struct fuse_link_in); 50 return (in.header.opcode == FUSE_LINK && 51 in.body.link.oldnodeid == ino && 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.nodeid = ino; 58 out.body.entry.attr.mode = mode; 59 out.body.entry.attr.nlink = nlink; 60 out.body.entry.attr_valid = UINT64_MAX; 61 out.body.entry.entry_valid = UINT64_MAX; 62 }))); 63 } 64 65 void expect_lookup(const char *relpath, uint64_t ino) 66 { 67 FuseTest::expect_lookup(relpath, ino, S_IFREG | 0644, 0, 1); 68 } 69 }; 70 71 class Link_7_8: public FuseTest { 72 public: 73 virtual void SetUp() { 74 m_kernel_minor_version = 8; 75 FuseTest::SetUp(); 76 } 77 78 void expect_link(uint64_t ino, const char *relpath, mode_t mode, uint32_t nlink) 79 { 80 EXPECT_CALL(*m_mock, process( 81 ResultOf([=](auto in) { 82 const char *name = (const char*)in.body.bytes 83 + sizeof(struct fuse_link_in); 84 return (in.header.opcode == FUSE_LINK && 85 in.body.link.oldnodeid == ino && 86 (0 == strcmp(name, relpath))); 87 }, Eq(true)), 88 _) 89 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 90 SET_OUT_HEADER_LEN(out, entry_7_8); 91 out.body.entry.nodeid = ino; 92 out.body.entry.attr.mode = mode; 93 out.body.entry.attr.nlink = nlink; 94 out.body.entry.attr_valid = UINT64_MAX; 95 out.body.entry.entry_valid = UINT64_MAX; 96 }))); 97 } 98 99 void expect_lookup(const char *relpath, uint64_t ino) 100 { 101 FuseTest::expect_lookup_7_8(relpath, ino, S_IFREG | 0644, 0, 1); 102 } 103 }; 104 105 /* 106 * A successful link should clear the parent directory's attribute cache, 107 * because the fuse daemon should update its mtime and ctime 108 */ 109 TEST_F(Link, clear_attr_cache) 110 { 111 const char FULLPATH[] = "mountpoint/src"; 112 const char RELPATH[] = "src"; 113 const char FULLDST[] = "mountpoint/dst"; 114 const char RELDST[] = "dst"; 115 const uint64_t ino = 42; 116 mode_t mode = S_IFREG | 0644; 117 struct stat sb; 118 119 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) 120 .WillOnce(Invoke(ReturnErrno(ENOENT))); 121 EXPECT_CALL(*m_mock, process( 122 ResultOf([=](auto in) { 123 return (in.header.opcode == FUSE_GETATTR && 124 in.header.nodeid == FUSE_ROOT_ID); 125 }, Eq(true)), 126 _) 127 ).Times(2) 128 .WillRepeatedly(Invoke(ReturnImmediate([=](auto i __unused, auto& out) { 129 SET_OUT_HEADER_LEN(out, attr); 130 out.body.attr.attr.ino = FUSE_ROOT_ID; 131 out.body.attr.attr.mode = S_IFDIR | 0755; 132 out.body.attr.attr_valid = UINT64_MAX; 133 }))); 134 135 EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) 136 137 .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 138 SET_OUT_HEADER_LEN(out, entry); 139 out.body.entry.attr.mode = mode; 140 out.body.entry.nodeid = ino; 141 out.body.entry.attr.nlink = 1; 142 out.body.entry.attr_valid = UINT64_MAX; 143 out.body.entry.entry_valid = UINT64_MAX; 144 }))); 145 expect_link(ino, RELPATH, mode, 2); 146 147 EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno); 148 EXPECT_EQ(0, link(FULLDST, FULLPATH)) << strerror(errno); 149 EXPECT_EQ(0, stat("mountpoint", &sb)) << strerror(errno); 150 } 151 152 TEST_F(Link, emlink) 153 { 154 const char FULLPATH[] = "mountpoint/lnk"; 155 const char RELPATH[] = "lnk"; 156 const char FULLDST[] = "mountpoint/dst"; 157 const char RELDST[] = "dst"; 158 uint64_t dst_ino = 42; 159 160 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) 161 .WillOnce(Invoke(ReturnErrno(ENOENT))); 162 expect_lookup(RELDST, dst_ino); 163 164 EXPECT_CALL(*m_mock, process( 165 ResultOf([=](auto in) { 166 const char *name = (const char*)in.body.bytes 167 + sizeof(struct fuse_link_in); 168 return (in.header.opcode == FUSE_LINK && 169 in.body.link.oldnodeid == dst_ino && 170 (0 == strcmp(name, RELPATH))); 171 }, Eq(true)), 172 _) 173 ).WillOnce(Invoke(ReturnErrno(EMLINK))); 174 175 EXPECT_EQ(-1, link(FULLDST, FULLPATH)); 176 EXPECT_EQ(EMLINK, errno); 177 } 178 179 /* 180 * A hard link should always have the same inode as its source. If it doesn't, 181 * then it's not a hard link. 182 */ 183 TEST_F(Link, bad_inode) 184 { 185 const char FULLPATH[] = "mountpoint/src"; 186 const char RELPATH[] = "src"; 187 const char FULLDST[] = "mountpoint/dst"; 188 const char RELDST[] = "dst"; 189 const uint64_t src_ino = 42; 190 const uint64_t dst_ino = 43; 191 mode_t mode = S_IFREG | 0644; 192 193 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) 194 .WillOnce(Invoke(ReturnErrno(ENOENT))); 195 EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) 196 .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 197 SET_OUT_HEADER_LEN(out, entry); 198 out.body.entry.attr.mode = mode; 199 out.body.entry.nodeid = dst_ino; 200 out.body.entry.attr.nlink = 1; 201 out.body.entry.attr_valid = UINT64_MAX; 202 out.body.entry.entry_valid = UINT64_MAX; 203 }))); 204 EXPECT_CALL(*m_mock, process( 205 ResultOf([=](auto in) { 206 const char *name = (const char*)in.body.bytes 207 + sizeof(struct fuse_link_in); 208 return (in.header.opcode == FUSE_LINK && 209 in.body.link.oldnodeid == dst_ino && 210 (0 == strcmp(name, RELPATH))); 211 }, Eq(true)), 212 _) 213 ).WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 214 SET_OUT_HEADER_LEN(out, entry); 215 out.body.entry.nodeid = src_ino; 216 out.body.entry.attr.mode = mode; 217 out.body.entry.attr.nlink = 2; 218 out.body.entry.attr_valid = UINT64_MAX; 219 out.body.entry.entry_valid = UINT64_MAX; 220 }))); 221 222 ASSERT_EQ(-1, link(FULLDST, FULLPATH)); 223 ASSERT_EQ(EIO, errno); 224 } 225 226 TEST_F(Link, ok) 227 { 228 const char FULLPATH[] = "mountpoint/src"; 229 const char RELPATH[] = "src"; 230 const char FULLDST[] = "mountpoint/dst"; 231 const char RELDST[] = "dst"; 232 const uint64_t ino = 42; 233 mode_t mode = S_IFREG | 0644; 234 struct stat sb; 235 236 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) 237 .WillOnce(Invoke(ReturnErrno(ENOENT))); 238 EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) 239 .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 240 SET_OUT_HEADER_LEN(out, entry); 241 out.body.entry.attr.mode = mode; 242 out.body.entry.nodeid = ino; 243 out.body.entry.attr.nlink = 1; 244 out.body.entry.attr_valid = UINT64_MAX; 245 out.body.entry.entry_valid = UINT64_MAX; 246 }))); 247 expect_link(ino, RELPATH, mode, 2); 248 249 ASSERT_EQ(0, link(FULLDST, FULLPATH)) << strerror(errno); 250 // Check that the original file's nlink count has increased. 251 ASSERT_EQ(0, stat(FULLDST, &sb)) << strerror(errno); 252 EXPECT_EQ(2ul, sb.st_nlink); 253 } 254 255 TEST_F(Link_7_8, ok) 256 { 257 const char FULLPATH[] = "mountpoint/src"; 258 const char RELPATH[] = "src"; 259 const char FULLDST[] = "mountpoint/dst"; 260 const char RELDST[] = "dst"; 261 const uint64_t ino = 42; 262 mode_t mode = S_IFREG | 0644; 263 struct stat sb; 264 265 EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) 266 .WillOnce(Invoke(ReturnErrno(ENOENT))); 267 EXPECT_LOOKUP(FUSE_ROOT_ID, RELDST) 268 .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { 269 SET_OUT_HEADER_LEN(out, entry_7_8); 270 out.body.entry.attr.mode = mode; 271 out.body.entry.nodeid = ino; 272 out.body.entry.attr.nlink = 1; 273 out.body.entry.attr_valid = UINT64_MAX; 274 out.body.entry.entry_valid = UINT64_MAX; 275 }))); 276 expect_link(ino, RELPATH, mode, 2); 277 278 ASSERT_EQ(0, link(FULLDST, FULLPATH)) << strerror(errno); 279 // Check that the original file's nlink count has increased. 280 ASSERT_EQ(0, stat(FULLDST, &sb)) << strerror(errno); 281 EXPECT_EQ(2ul, sb.st_nlink); 282 } 283