| 1 | #include "qemu/osdep.h" |
| 2 | #include "qapi/error.h" |
| 3 | #include "qemu/iov.h" |
| 4 | #include "qemu/sockets.h" |
| 5 | |
| 6 | /* create a randomly-sized iovec with random vectors */ |
| 7 | static void iov_random(struct iovec **iovp, unsigned *iov_cntp) |
| 8 | { |
| 9 | unsigned niov = g_test_rand_int_range(3,8); |
| 10 | struct iovec *iov = g_malloc(niov * sizeof(*iov)); |
| 11 | unsigned i; |
| 12 | for (i = 0; i < niov; ++i) { |
| 13 | iov[i].iov_len = g_test_rand_int_range(5,20); |
| 14 | iov[i].iov_base = g_malloc(iov[i].iov_len); |
| 15 | } |
| 16 | *iovp = iov; |
| 17 | *iov_cntp = niov; |
| 18 | } |
| 19 | |
| 20 | static void iov_free(struct iovec *iov, unsigned niov) |
| 21 | { |
| 22 | unsigned i; |
| 23 | for (i = 0; i < niov; ++i) { |
| 24 | g_free(iov[i].iov_base); |
| 25 | } |
| 26 | g_free(iov); |
| 27 | } |
| 28 | |
| 29 | static bool iov_equals(const struct iovec *a, const struct iovec *b, |
| 30 | unsigned niov) |
| 31 | { |
| 32 | return memcmp(a, b, sizeof(a[0]) * niov) == 0; |
| 33 | } |
| 34 | |
| 35 | static void test_iov_bytes(struct iovec *iov, unsigned niov, |
| 36 | size_t offset, size_t bytes) |
| 37 | { |
| 38 | unsigned i; |
| 39 | size_t j, o; |
| 40 | unsigned char *b; |
| 41 | o = 0; |
| 42 | |
| 43 | /* we walk over all elements, */ |
| 44 | for (i = 0; i < niov; ++i) { |
| 45 | b = iov[i].iov_base; |
| 46 | /* over each char of each element, */ |
| 47 | for (j = 0; j < iov[i].iov_len; ++j) { |
| 48 | /* counting each of them and |
| 49 | * verifying that the ones within [offset,offset+bytes) |
| 50 | * range are equal to the position number (o) */ |
| 51 | if (o >= offset && o < offset + bytes) { |
| 52 | g_assert(b[j] == (o & 255)); |
| 53 | } else { |
| 54 | g_assert(b[j] == 0xff); |
| 55 | } |
| 56 | ++o; |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | static void test_to_from_buf_1(void) |
| 62 | { |
| 63 | unsigned niov; |
| 64 | struct iovec *iov; |
| 65 | size_t sz; |
| 66 | unsigned char *ibuf, *obuf; |
| 67 | unsigned i, j, n; |
| 68 | |
| 69 | iov_random(&iov, &niov); |
| 70 | |
| 71 | sz = iov_size(iov, niov); |
| 72 | |
| 73 | ibuf = g_malloc(sz + 8) + 4; |
| 74 | memcpy(ibuf-4, "aaaa", 4); memcpy(ibuf + sz, "bbbb", 4); |
| 75 | obuf = g_malloc(sz + 8) + 4; |
| 76 | memcpy(obuf-4, "xxxx", 4); memcpy(obuf + sz, "yyyy", 4); |
| 77 | |
| 78 | /* fill in ibuf with 0123456... */ |
| 79 | for (i = 0; i < sz; ++i) { |
| 80 | ibuf[i] = i & 255; |
| 81 | } |
| 82 | |
| 83 | for (i = 0; i <= sz; ++i) { |
| 84 | |
| 85 | /* Test from/to buf for offset(i) in [0..sz] up to the end of buffer. |
| 86 | * For last iteration with offset == sz, the procedure should |
| 87 | * skip whole vector and process exactly 0 bytes */ |
| 88 | |
| 89 | /* first set bytes [i..sz) to some "random" value */ |
| 90 | n = iov_memset(iov, niov, 0, 0xff, sz); |
| 91 | g_assert(n == sz); |
| 92 | |
| 93 | /* next copy bytes [i..sz) from ibuf to iovec */ |
| 94 | n = iov_from_buf(iov, niov, i, ibuf + i, sz - i); |
| 95 | g_assert(n == sz - i); |
| 96 | |
| 97 | /* clear part of obuf */ |
| 98 | memset(obuf + i, 0, sz - i); |
| 99 | /* and set this part of obuf to values from iovec */ |
| 100 | n = iov_to_buf(iov, niov, i, obuf + i, sz - i); |
| 101 | g_assert(n == sz - i); |
| 102 | |
| 103 | /* now compare resulting buffers */ |
| 104 | g_assert(memcmp(ibuf, obuf, sz) == 0); |
| 105 | |
| 106 | /* test just one char */ |
| 107 | n = iov_to_buf(iov, niov, i, obuf + i, 1); |
| 108 | g_assert(n == (i < sz)); |
| 109 | if (n) { |
| 110 | g_assert(obuf[i] == (i & 255)); |
| 111 | } |
| 112 | |
| 113 | for (j = i; j <= sz; ++j) { |
| 114 | /* now test num of bytes cap up to byte no. j, |
| 115 | * with j in [i..sz]. */ |
| 116 | |
| 117 | /* clear iovec */ |
| 118 | n = iov_memset(iov, niov, 0, 0xff, sz); |
| 119 | g_assert(n == sz); |
| 120 | |
| 121 | /* copy bytes [i..j) from ibuf to iovec */ |
| 122 | n = iov_from_buf(iov, niov, i, ibuf + i, j - i); |
| 123 | g_assert(n == j - i); |
| 124 | |
| 125 | /* clear part of obuf */ |
| 126 | memset(obuf + i, 0, j - i); |
| 127 | |
| 128 | /* copy bytes [i..j) from iovec to obuf */ |
| 129 | n = iov_to_buf(iov, niov, i, obuf + i, j - i); |
| 130 | g_assert(n == j - i); |
| 131 | |
| 132 | /* verify result */ |
| 133 | g_assert(memcmp(ibuf, obuf, sz) == 0); |
| 134 | |
| 135 | /* now actually check if the iovec contains the right data */ |
| 136 | test_iov_bytes(iov, niov, i, j - i); |
| 137 | } |
| 138 | } |
| 139 | g_assert(!memcmp(ibuf-4, "aaaa", 4) && !memcmp(ibuf+sz, "bbbb", 4)); |
| 140 | g_free(ibuf-4); |
| 141 | g_assert(!memcmp(obuf-4, "xxxx", 4) && !memcmp(obuf+sz, "yyyy", 4)); |
| 142 | g_free(obuf-4); |
| 143 | iov_free(iov, niov); |
| 144 | } |
| 145 | |
| 146 | static void test_to_from_buf(void) |
| 147 | { |
| 148 | int x; |
| 149 | for (x = 0; x < 4; ++x) { |
| 150 | test_to_from_buf_1(); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | static void test_io(void) |
| 155 | { |
| 156 | #ifndef _WIN32 |
| 157 | /* socketpair(PF_UNIX) which does not exist on windows */ |
| 158 | |
| 159 | int sv[2]; |
| 160 | int r; |
| 161 | unsigned i, j, k, s; |
| 162 | fd_set fds; |
| 163 | unsigned niov; |
| 164 | struct iovec *iov, *siov; |
| 165 | unsigned char *buf; |
| 166 | size_t sz; |
| 167 | |
| 168 | iov_random(&iov, &niov); |
| 169 | sz = iov_size(iov, niov); |
| 170 | buf = g_malloc(sz); |
| 171 | for (i = 0; i < sz; ++i) { |
| 172 | buf[i] = i & 255; |
| 173 | } |
| 174 | iov_from_buf(iov, niov, 0, buf, sz); |
| 175 | |
| 176 | siov = g_memdup2(iov, sizeof(*iov) * niov); |
| 177 | |
| 178 | if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) < 0) { |
| 179 | perror("socketpair"); |
| 180 | exit(1); |
| 181 | } |
| 182 | |
| 183 | FD_ZERO(&fds); |
| 184 | |
| 185 | if (fork() == 0) { |
| 186 | /* writer */ |
| 187 | |
| 188 | close(sv[0]); |
| 189 | FD_SET(sv[1], &fds); |
| 190 | qemu_set_blocking(sv[1], false, &error_abort); |
| 191 | r = g_test_rand_int_range(sz / 2, sz); |
| 192 | setsockopt(sv[1], SOL_SOCKET, SO_SNDBUF, &r, sizeof(r)); |
| 193 | |
| 194 | for (i = 0; i <= sz; ++i) { |
| 195 | for (j = i; j <= sz; ++j) { |
| 196 | k = i; |
| 197 | do { |
| 198 | s = g_test_rand_int_range(0, j - k + 1); |
| 199 | r = iov_send(sv[1], iov, niov, k, s); |
| 200 | g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); |
| 201 | if (r < 0) { |
| 202 | if (errno == EAGAIN) { |
| 203 | r = 0; |
| 204 | } else { |
| 205 | perror("send"); |
| 206 | exit(1); |
| 207 | } |
| 208 | } |
| 209 | k += r; |
| 210 | if (k < j) { |
| 211 | select(sv[1] + 1, NULL, &fds, NULL, NULL); |
| 212 | } |
| 213 | } while(k < j); |
| 214 | } |
| 215 | } |
| 216 | iov_free(iov, niov); |
| 217 | g_free(buf); |
| 218 | g_free(siov); |
| 219 | exit(0); |
| 220 | |
| 221 | } else { |
| 222 | /* reader & verifier */ |
| 223 | |
| 224 | close(sv[1]); |
| 225 | FD_SET(sv[0], &fds); |
| 226 | qemu_set_blocking(sv[0], false, &error_abort); |
| 227 | r = g_test_rand_int_range(sz / 2, sz); |
| 228 | setsockopt(sv[0], SOL_SOCKET, SO_RCVBUF, &r, sizeof(r)); |
| 229 | usleep(500000); |
| 230 | |
| 231 | for (i = 0; i <= sz; ++i) { |
| 232 | for (j = i; j <= sz; ++j) { |
| 233 | k = i; |
| 234 | iov_memset(iov, niov, 0, 0xff, sz); |
| 235 | do { |
| 236 | s = g_test_rand_int_range(0, j - k + 1); |
| 237 | r = iov_recv(sv[0], iov, niov, k, s); |
| 238 | g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); |
| 239 | if (r > 0) { |
| 240 | k += r; |
| 241 | } else if (!r) { |
| 242 | if (s) { |
| 243 | break; |
| 244 | } |
| 245 | } else if (errno == EAGAIN) { |
| 246 | select(sv[0]+1, &fds, NULL, NULL, NULL); |
| 247 | continue; |
| 248 | } else { |
| 249 | perror("recv"); |
| 250 | exit(1); |
| 251 | } |
| 252 | } while(k < j); |
| 253 | test_iov_bytes(iov, niov, i, j - i); |
| 254 | } |
| 255 | } |
| 256 | |
| 257 | iov_free(iov, niov); |
| 258 | g_free(buf); |
| 259 | g_free(siov); |
| 260 | } |
| 261 | #endif |
| 262 | } |
| 263 | |
| 264 | static void test_discard_front(void) |
| 265 | { |
| 266 | struct iovec *iov; |
| 267 | struct iovec *iov_tmp; |
| 268 | unsigned int iov_cnt; |
| 269 | unsigned int iov_cnt_tmp; |
| 270 | void *old_base; |
| 271 | size_t size; |
| 272 | size_t ret; |
| 273 | |
| 274 | /* Discard zero bytes */ |
| 275 | iov_random(&iov, &iov_cnt); |
| 276 | iov_tmp = iov; |
| 277 | iov_cnt_tmp = iov_cnt; |
| 278 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, 0); |
| 279 | g_assert(ret == 0); |
| 280 | g_assert(iov_tmp == iov); |
| 281 | g_assert(iov_cnt_tmp == iov_cnt); |
| 282 | iov_free(iov, iov_cnt); |
| 283 | |
| 284 | /* Discard more bytes than vector size */ |
| 285 | iov_random(&iov, &iov_cnt); |
| 286 | iov_tmp = iov; |
| 287 | iov_cnt_tmp = iov_cnt; |
| 288 | size = iov_size(iov, iov_cnt); |
| 289 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size + 1); |
| 290 | g_assert(ret == size); |
| 291 | g_assert(iov_cnt_tmp == 0); |
| 292 | iov_free(iov, iov_cnt); |
| 293 | |
| 294 | /* Discard entire vector */ |
| 295 | iov_random(&iov, &iov_cnt); |
| 296 | iov_tmp = iov; |
| 297 | iov_cnt_tmp = iov_cnt; |
| 298 | size = iov_size(iov, iov_cnt); |
| 299 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); |
| 300 | g_assert(ret == size); |
| 301 | g_assert(iov_cnt_tmp == 0); |
| 302 | iov_free(iov, iov_cnt); |
| 303 | |
| 304 | /* Discard within first element */ |
| 305 | iov_random(&iov, &iov_cnt); |
| 306 | iov_tmp = iov; |
| 307 | iov_cnt_tmp = iov_cnt; |
| 308 | old_base = iov->iov_base; |
| 309 | size = g_test_rand_int_range(1, iov->iov_len); |
| 310 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); |
| 311 | g_assert(ret == size); |
| 312 | g_assert(iov_tmp == iov); |
| 313 | g_assert(iov_cnt_tmp == iov_cnt); |
| 314 | g_assert(iov_tmp->iov_base == old_base + size); |
| 315 | iov_tmp->iov_base = old_base; /* undo before g_free() */ |
| 316 | iov_free(iov, iov_cnt); |
| 317 | |
| 318 | /* Discard entire first element */ |
| 319 | iov_random(&iov, &iov_cnt); |
| 320 | iov_tmp = iov; |
| 321 | iov_cnt_tmp = iov_cnt; |
| 322 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, iov->iov_len); |
| 323 | g_assert(ret == iov->iov_len); |
| 324 | g_assert(iov_tmp == iov + 1); |
| 325 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 326 | iov_free(iov, iov_cnt); |
| 327 | |
| 328 | /* Discard within second element */ |
| 329 | iov_random(&iov, &iov_cnt); |
| 330 | iov_tmp = iov; |
| 331 | iov_cnt_tmp = iov_cnt; |
| 332 | old_base = iov[1].iov_base; |
| 333 | size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len); |
| 334 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); |
| 335 | g_assert(ret == size); |
| 336 | g_assert(iov_tmp == iov + 1); |
| 337 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 338 | g_assert(iov_tmp->iov_base == old_base + (size - iov->iov_len)); |
| 339 | iov_tmp->iov_base = old_base; /* undo before g_free() */ |
| 340 | iov_free(iov, iov_cnt); |
| 341 | } |
| 342 | |
| 343 | static void test_discard_front_undo(void) |
| 344 | { |
| 345 | IOVDiscardUndo undo; |
| 346 | struct iovec *iov; |
| 347 | struct iovec *iov_tmp; |
| 348 | struct iovec *iov_orig; |
| 349 | unsigned int iov_cnt; |
| 350 | unsigned int iov_cnt_tmp; |
| 351 | size_t size; |
| 352 | |
| 353 | /* Discard zero bytes */ |
| 354 | iov_random(&iov, &iov_cnt); |
| 355 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 356 | iov_tmp = iov; |
| 357 | iov_cnt_tmp = iov_cnt; |
| 358 | iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, 0, &undo); |
| 359 | iov_discard_undo(&undo); |
| 360 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 361 | g_free(iov_orig); |
| 362 | iov_free(iov, iov_cnt); |
| 363 | |
| 364 | /* Discard more bytes than vector size */ |
| 365 | iov_random(&iov, &iov_cnt); |
| 366 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 367 | iov_tmp = iov; |
| 368 | iov_cnt_tmp = iov_cnt; |
| 369 | size = iov_size(iov, iov_cnt); |
| 370 | iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size + 1, &undo); |
| 371 | iov_discard_undo(&undo); |
| 372 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 373 | g_free(iov_orig); |
| 374 | iov_free(iov, iov_cnt); |
| 375 | |
| 376 | /* Discard entire vector */ |
| 377 | iov_random(&iov, &iov_cnt); |
| 378 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 379 | iov_tmp = iov; |
| 380 | iov_cnt_tmp = iov_cnt; |
| 381 | size = iov_size(iov, iov_cnt); |
| 382 | iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size, &undo); |
| 383 | iov_discard_undo(&undo); |
| 384 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 385 | g_free(iov_orig); |
| 386 | iov_free(iov, iov_cnt); |
| 387 | |
| 388 | /* Discard within first element */ |
| 389 | iov_random(&iov, &iov_cnt); |
| 390 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 391 | iov_tmp = iov; |
| 392 | iov_cnt_tmp = iov_cnt; |
| 393 | size = g_test_rand_int_range(1, iov->iov_len); |
| 394 | iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size, &undo); |
| 395 | iov_discard_undo(&undo); |
| 396 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 397 | g_free(iov_orig); |
| 398 | iov_free(iov, iov_cnt); |
| 399 | |
| 400 | /* Discard entire first element */ |
| 401 | iov_random(&iov, &iov_cnt); |
| 402 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 403 | iov_tmp = iov; |
| 404 | iov_cnt_tmp = iov_cnt; |
| 405 | iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, iov->iov_len, &undo); |
| 406 | iov_discard_undo(&undo); |
| 407 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 408 | g_free(iov_orig); |
| 409 | iov_free(iov, iov_cnt); |
| 410 | |
| 411 | /* Discard within second element */ |
| 412 | iov_random(&iov, &iov_cnt); |
| 413 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 414 | iov_tmp = iov; |
| 415 | iov_cnt_tmp = iov_cnt; |
| 416 | size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len); |
| 417 | iov_discard_front_undoable(&iov_tmp, &iov_cnt_tmp, size, &undo); |
| 418 | iov_discard_undo(&undo); |
| 419 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 420 | g_free(iov_orig); |
| 421 | iov_free(iov, iov_cnt); |
| 422 | } |
| 423 | |
| 424 | static void test_discard_back(void) |
| 425 | { |
| 426 | struct iovec *iov; |
| 427 | unsigned int iov_cnt; |
| 428 | unsigned int iov_cnt_tmp; |
| 429 | void *old_base; |
| 430 | size_t size; |
| 431 | size_t ret; |
| 432 | |
| 433 | /* Discard zero bytes */ |
| 434 | iov_random(&iov, &iov_cnt); |
| 435 | iov_cnt_tmp = iov_cnt; |
| 436 | ret = iov_discard_back(iov, &iov_cnt_tmp, 0); |
| 437 | g_assert(ret == 0); |
| 438 | g_assert(iov_cnt_tmp == iov_cnt); |
| 439 | iov_free(iov, iov_cnt); |
| 440 | |
| 441 | /* Discard more bytes than vector size */ |
| 442 | iov_random(&iov, &iov_cnt); |
| 443 | iov_cnt_tmp = iov_cnt; |
| 444 | size = iov_size(iov, iov_cnt); |
| 445 | ret = iov_discard_back(iov, &iov_cnt_tmp, size + 1); |
| 446 | g_assert(ret == size); |
| 447 | g_assert(iov_cnt_tmp == 0); |
| 448 | iov_free(iov, iov_cnt); |
| 449 | |
| 450 | /* Discard entire vector */ |
| 451 | iov_random(&iov, &iov_cnt); |
| 452 | iov_cnt_tmp = iov_cnt; |
| 453 | size = iov_size(iov, iov_cnt); |
| 454 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 455 | g_assert(ret == size); |
| 456 | g_assert(iov_cnt_tmp == 0); |
| 457 | iov_free(iov, iov_cnt); |
| 458 | |
| 459 | /* Discard within last element */ |
| 460 | iov_random(&iov, &iov_cnt); |
| 461 | iov_cnt_tmp = iov_cnt; |
| 462 | old_base = iov[iov_cnt - 1].iov_base; |
| 463 | size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len); |
| 464 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 465 | g_assert(ret == size); |
| 466 | g_assert(iov_cnt_tmp == iov_cnt); |
| 467 | g_assert(iov[iov_cnt - 1].iov_base == old_base); |
| 468 | iov_free(iov, iov_cnt); |
| 469 | |
| 470 | /* Discard entire last element */ |
| 471 | iov_random(&iov, &iov_cnt); |
| 472 | iov_cnt_tmp = iov_cnt; |
| 473 | old_base = iov[iov_cnt - 1].iov_base; |
| 474 | size = iov[iov_cnt - 1].iov_len; |
| 475 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 476 | g_assert(ret == size); |
| 477 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 478 | iov_free(iov, iov_cnt); |
| 479 | |
| 480 | /* Discard within second-to-last element */ |
| 481 | iov_random(&iov, &iov_cnt); |
| 482 | iov_cnt_tmp = iov_cnt; |
| 483 | old_base = iov[iov_cnt - 2].iov_base; |
| 484 | size = iov[iov_cnt - 1].iov_len + |
| 485 | g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len); |
| 486 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 487 | g_assert(ret == size); |
| 488 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 489 | g_assert(iov[iov_cnt - 2].iov_base == old_base); |
| 490 | iov_free(iov, iov_cnt); |
| 491 | } |
| 492 | |
| 493 | static void test_discard_back_undo(void) |
| 494 | { |
| 495 | IOVDiscardUndo undo; |
| 496 | struct iovec *iov; |
| 497 | struct iovec *iov_orig; |
| 498 | unsigned int iov_cnt; |
| 499 | unsigned int iov_cnt_tmp; |
| 500 | size_t size; |
| 501 | |
| 502 | /* Discard zero bytes */ |
| 503 | iov_random(&iov, &iov_cnt); |
| 504 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 505 | iov_cnt_tmp = iov_cnt; |
| 506 | iov_discard_back_undoable(iov, &iov_cnt_tmp, 0, &undo); |
| 507 | iov_discard_undo(&undo); |
| 508 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 509 | g_free(iov_orig); |
| 510 | iov_free(iov, iov_cnt); |
| 511 | |
| 512 | /* Discard more bytes than vector size */ |
| 513 | iov_random(&iov, &iov_cnt); |
| 514 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 515 | iov_cnt_tmp = iov_cnt; |
| 516 | size = iov_size(iov, iov_cnt); |
| 517 | iov_discard_back_undoable(iov, &iov_cnt_tmp, size + 1, &undo); |
| 518 | iov_discard_undo(&undo); |
| 519 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 520 | g_free(iov_orig); |
| 521 | iov_free(iov, iov_cnt); |
| 522 | |
| 523 | /* Discard entire vector */ |
| 524 | iov_random(&iov, &iov_cnt); |
| 525 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 526 | iov_cnt_tmp = iov_cnt; |
| 527 | size = iov_size(iov, iov_cnt); |
| 528 | iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); |
| 529 | iov_discard_undo(&undo); |
| 530 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 531 | g_free(iov_orig); |
| 532 | iov_free(iov, iov_cnt); |
| 533 | |
| 534 | /* Discard within last element */ |
| 535 | iov_random(&iov, &iov_cnt); |
| 536 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 537 | iov_cnt_tmp = iov_cnt; |
| 538 | size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len); |
| 539 | iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); |
| 540 | iov_discard_undo(&undo); |
| 541 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 542 | g_free(iov_orig); |
| 543 | iov_free(iov, iov_cnt); |
| 544 | |
| 545 | /* Discard entire last element */ |
| 546 | iov_random(&iov, &iov_cnt); |
| 547 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 548 | iov_cnt_tmp = iov_cnt; |
| 549 | size = iov[iov_cnt - 1].iov_len; |
| 550 | iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); |
| 551 | iov_discard_undo(&undo); |
| 552 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 553 | g_free(iov_orig); |
| 554 | iov_free(iov, iov_cnt); |
| 555 | |
| 556 | /* Discard within second-to-last element */ |
| 557 | iov_random(&iov, &iov_cnt); |
| 558 | iov_orig = g_memdup2(iov, sizeof(iov[0]) * iov_cnt); |
| 559 | iov_cnt_tmp = iov_cnt; |
| 560 | size = iov[iov_cnt - 1].iov_len + |
| 561 | g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len); |
| 562 | iov_discard_back_undoable(iov, &iov_cnt_tmp, size, &undo); |
| 563 | iov_discard_undo(&undo); |
| 564 | assert(iov_equals(iov, iov_orig, iov_cnt)); |
| 565 | g_free(iov_orig); |
| 566 | iov_free(iov, iov_cnt); |
| 567 | } |
| 568 | |
| 569 | int main(int argc, char **argv) |
| 570 | { |
| 571 | g_test_init(&argc, &argv, NULL); |
| 572 | g_test_rand_int(); |
| 573 | g_test_add_func("/basic/iov/from-to-buf", test_to_from_buf); |
| 574 | g_test_add_func("/basic/iov/io", test_io); |
| 575 | g_test_add_func("/basic/iov/discard-front", test_discard_front); |
| 576 | g_test_add_func("/basic/iov/discard-back", test_discard_back); |
| 577 | g_test_add_func("/basic/iov/discard-front-undo", test_discard_front_undo); |
| 578 | g_test_add_func("/basic/iov/discard-back-undo", test_discard_back_undo); |
| 579 | return g_test_run(); |
| 580 | } |