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 struct _sem; 32 typedef struct _sem sem_t; 33 struct _dirdesc; 34 typedef struct _dirdesc DIR; 35 36 /* Nanoseconds to sleep, for tests that must */ 37 #define NAP_NS (100'000'000) 38 39 void get_unprivileged_id(uid_t *uid, gid_t *gid); nap()40 inline void nap() 41 { 42 usleep(NAP_NS / 1000); 43 } 44 45 enum cache_mode { 46 Uncached, 47 Writethrough, 48 Writeback, 49 WritebackAsync 50 }; 51 52 const char *cache_mode_to_s(enum cache_mode cm); 53 bool is_unsafe_aio_enabled(void); 54 55 extern const uint32_t libfuse_max_write; 56 class FuseTest : public ::testing::Test { 57 protected: 58 uint32_t m_maxread; 59 uint32_t m_maxreadahead; 60 uint32_t m_maxwrite; 61 uint32_t m_init_flags; 62 bool m_allow_other; 63 bool m_default_permissions; 64 uint32_t m_kernel_minor_version; 65 enum poll_method m_pm; 66 bool m_noatime; 67 bool m_push_symlinks_in; 68 bool m_ro; 69 bool m_async; 70 bool m_noclusterr; 71 bool m_nointr; 72 unsigned m_time_gran; 73 MockFS *m_mock = NULL; 74 const static uint64_t FH = 0xdeadbeef1a7ebabe; 75 const char *reclaim_mib = "debug.try_reclaim_vnode"; 76 const char *m_fsname; 77 const char *m_subtype; 78 79 public: 80 int m_maxbcachebuf; 81 unsigned long m_maxphys; 82 FuseTest()83 FuseTest(): 84 m_maxread(0), 85 m_maxreadahead(0), 86 m_maxwrite(0), 87 m_init_flags(0), 88 m_allow_other(false), 89 m_default_permissions(false), 90 m_kernel_minor_version(FUSE_KERNEL_MINOR_VERSION), 91 m_pm(BLOCKING), 92 m_noatime(false), 93 m_push_symlinks_in(false), 94 m_ro(false), 95 m_async(false), 96 m_noclusterr(false), 97 m_nointr(false), 98 m_time_gran(1), 99 m_fsname(""), 100 m_subtype(""), 101 m_maxbcachebuf(0), 102 m_maxphys(0) 103 {} 104 105 virtual void SetUp(); 106 TearDown()107 virtual void TearDown() { 108 if (m_mock) 109 delete m_mock; 110 } 111 112 /* 113 * Create an expectation that FUSE_ACCESS will be called once for the 114 * given inode with the given access_mode, returning the given errno 115 */ 116 void expect_access(uint64_t ino, mode_t access_mode, int error); 117 118 /* Expect FUSE_DESTROY and shutdown the daemon */ 119 void expect_destroy(int error); 120 121 /* 122 * Create an expectation that FUSE_FALLOCATE will be called with the 123 * given inode, offset, length, and mode, exactly times times and 124 * returning error 125 */ 126 void expect_fallocate(uint64_t ino, uint64_t offset, uint64_t length, 127 uint32_t mode, int error, int times=1); 128 129 /* 130 * Create an expectation that FUSE_FLUSH will be called times times for 131 * the given inode 132 */ 133 void expect_flush(uint64_t ino, int times, ProcessMockerT r); 134 135 /* 136 * Create an expectation that FUSE_FORGET will be called for the given 137 * inode. There will be no response. If sem is provided, it will be 138 * posted after the operation is received by the daemon. 139 */ 140 void expect_forget(uint64_t ino, uint64_t nlookup, sem_t *sem = NULL); 141 142 /* 143 * Create an expectation that FUSE_GETATTR will be called for the given 144 * inode any number of times. It will respond with a few basic 145 * attributes, like the given size and the mode S_IFREG | 0644 146 */ 147 void expect_getattr(uint64_t ino, uint64_t size); 148 149 /* 150 * Create an expectation that FUSE_GETXATTR will be called once for the 151 * given inode. 152 */ 153 void expect_getxattr(uint64_t ino, const char *attr, ProcessMockerT r); 154 155 /* 156 * Create an expectation that FUSE_LOOKUP will be called for the given 157 * path exactly times times and cache validity period. It will respond 158 * with inode ino, mode mode, filesize size. 159 */ 160 void expect_lookup(const char *relpath, uint64_t ino, mode_t mode, 161 uint64_t size, int times, uint64_t attr_valid = UINT64_MAX, 162 uid_t uid = 0, gid_t gid = 0); 163 164 /* The protocol 7.8 version of expect_lookup */ 165 void expect_lookup_7_8(const char *relpath, uint64_t ino, mode_t mode, 166 uint64_t size, int times, uint64_t attr_valid = UINT64_MAX, 167 uid_t uid = 0, gid_t gid = 0); 168 169 /* 170 * Create an expectation that FUSE_OPEN will be called for the given 171 * inode exactly times times. It will return with open_flags flags and 172 * file handle FH. 173 */ 174 void expect_open(uint64_t ino, uint32_t flags, int times); 175 176 /* 177 * Create an expectation that FUSE_OPENDIR will be called exactly once 178 * for inode ino. 179 */ 180 void expect_opendir(uint64_t ino); 181 182 /* 183 * Create an expectation that FUSE_READ will be called exactly once for 184 * the given inode, at offset offset and with size isize. It will 185 * return the first osize bytes from contents 186 * 187 * Protocol 7.8 tests can use this same expectation method because 188 * nothing currently validates the size of the fuse_read_in struct. 189 */ 190 void expect_read(uint64_t ino, uint64_t offset, uint64_t isize, 191 uint64_t osize, const void *contents, int flags = -1, 192 uint64_t fh = FH); 193 194 /* 195 * Create an expectation that FUSE_READIR will be called any number of 196 * times on the given ino with the given offset, returning (by copy) 197 * the provided entries 198 */ 199 void expect_readdir(uint64_t ino, uint64_t off, 200 std::vector<struct dirent> &ents); 201 202 /* 203 * Create an expectation that FUSE_RELEASE will be called exactly once 204 * for the given inode and filehandle, returning success 205 */ 206 void expect_release(uint64_t ino, uint64_t fh); 207 208 /* 209 * Create an expectation that FUSE_RELEASEDIR will be called exactly 210 * once for the given inode 211 */ 212 void expect_releasedir(uint64_t ino, ProcessMockerT r); 213 214 /* 215 * Create an expectation that FUSE_UNLINK will be called exactly once 216 * for the given path, returning an errno 217 */ 218 void expect_unlink(uint64_t parent, const char *path, int error); 219 220 /* 221 * Create an expectation that FUSE_WRITE will be called exactly once 222 * for the given inode, at offset offset, with size isize and buffer 223 * contents. Any flags present in flags_set must be set, and any 224 * present in flags_unset must not be set. Other flags are don't care. 225 * It will return osize. 226 */ 227 void expect_write(uint64_t ino, uint64_t offset, uint64_t isize, 228 uint64_t osize, uint32_t flags_set, uint32_t flags_unset, 229 const void *contents); 230 231 /* Protocol 7.8 version of expect_write */ 232 void expect_write_7_8(uint64_t ino, uint64_t offset, uint64_t isize, 233 uint64_t osize, const void *contents); 234 235 /* 236 * Helper that runs code in a child process. 237 * 238 * First, parent_func runs in the parent process. 239 * Then, child_func runs in the child process, dropping privileges if 240 * desired. 241 * Finally, fusetest_fork returns. 242 * 243 * # Returns 244 * 245 * fusetest_fork may SKIP the test, which the caller should detect with 246 * the IsSkipped() method. If not, then the child's exit status will 247 * be returned in status. 248 */ 249 void fork(bool drop_privs, int *status, 250 std::function<void()> parent_func, 251 std::function<int()> child_func); 252 253 /* 254 * Deliberately leak a file descriptor. 255 * 256 * Closing a file descriptor on fusefs would cause the server to 257 * receive FUSE_CLOSE and possibly FUSE_INACTIVE. Handling those 258 * operations would needlessly complicate most tests. So most tests 259 * deliberately leak the file descriptors instead. This method serves 260 * to document the leakage, and provide a single point of suppression 261 * for static analyzers. 262 */ 263 /* coverity[+close: arg-0] */ leak(int fd __unused)264 static void leak(int fd __unused) {} 265 266 /* 267 * Deliberately leak a DIR* pointer 268 * 269 * See comments for FuseTest::leak 270 */ leakdir(DIR * dirp __unused)271 static void leakdir(DIR* dirp __unused) {} 272 273 /* Manually reclaim a vnode. Requires root privileges. */ 274 void reclaim_vnode(const char *fullpath); 275 }; 276