Peter Maydell | 681c28a | 2016-02-08 18:08:51 +0000 | [diff] [blame] | 1 | #include "qemu/osdep.h" |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 2 | #include "qemu-common.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 3 | #include "qemu/iov.h" |
| 4 | #include "qemu/sockets.h" |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 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 void test_iov_bytes(struct iovec *iov, unsigned niov, |
| 30 | size_t offset, size_t bytes) |
| 31 | { |
| 32 | unsigned i; |
| 33 | size_t j, o; |
| 34 | unsigned char *b; |
| 35 | o = 0; |
| 36 | |
| 37 | /* we walk over all elements, */ |
| 38 | for (i = 0; i < niov; ++i) { |
| 39 | b = iov[i].iov_base; |
| 40 | /* over each char of each element, */ |
| 41 | for (j = 0; j < iov[i].iov_len; ++j) { |
| 42 | /* counting each of them and |
| 43 | * verifying that the ones within [offset,offset+bytes) |
| 44 | * range are equal to the position number (o) */ |
| 45 | if (o >= offset && o < offset + bytes) { |
| 46 | g_assert(b[j] == (o & 255)); |
| 47 | } else { |
| 48 | g_assert(b[j] == 0xff); |
| 49 | } |
| 50 | ++o; |
| 51 | } |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | static void test_to_from_buf_1(void) |
| 56 | { |
| 57 | unsigned niov; |
| 58 | struct iovec *iov; |
| 59 | size_t sz; |
| 60 | unsigned char *ibuf, *obuf; |
| 61 | unsigned i, j, n; |
| 62 | |
| 63 | iov_random(&iov, &niov); |
| 64 | |
| 65 | sz = iov_size(iov, niov); |
| 66 | |
| 67 | ibuf = g_malloc(sz + 8) + 4; |
| 68 | memcpy(ibuf-4, "aaaa", 4); memcpy(ibuf + sz, "bbbb", 4); |
| 69 | obuf = g_malloc(sz + 8) + 4; |
| 70 | memcpy(obuf-4, "xxxx", 4); memcpy(obuf + sz, "yyyy", 4); |
| 71 | |
| 72 | /* fill in ibuf with 0123456... */ |
| 73 | for (i = 0; i < sz; ++i) { |
| 74 | ibuf[i] = i & 255; |
| 75 | } |
| 76 | |
| 77 | for (i = 0; i <= sz; ++i) { |
| 78 | |
| 79 | /* Test from/to buf for offset(i) in [0..sz] up to the end of buffer. |
| 80 | * For last iteration with offset == sz, the procedure should |
| 81 | * skip whole vector and process exactly 0 bytes */ |
| 82 | |
| 83 | /* first set bytes [i..sz) to some "random" value */ |
Juan Quintela | e3ff9f0 | 2017-08-23 10:25:26 +0200 | [diff] [blame] | 84 | n = iov_memset(iov, niov, 0, 0xff, sz); |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 85 | g_assert(n == sz); |
| 86 | |
| 87 | /* next copy bytes [i..sz) from ibuf to iovec */ |
Juan Quintela | e3ff9f0 | 2017-08-23 10:25:26 +0200 | [diff] [blame] | 88 | n = iov_from_buf(iov, niov, i, ibuf + i, sz - i); |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 89 | g_assert(n == sz - i); |
| 90 | |
| 91 | /* clear part of obuf */ |
| 92 | memset(obuf + i, 0, sz - i); |
| 93 | /* and set this part of obuf to values from iovec */ |
Juan Quintela | e3ff9f0 | 2017-08-23 10:25:26 +0200 | [diff] [blame] | 94 | n = iov_to_buf(iov, niov, i, obuf + i, sz - i); |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 95 | g_assert(n == sz - i); |
| 96 | |
| 97 | /* now compare resulting buffers */ |
| 98 | g_assert(memcmp(ibuf, obuf, sz) == 0); |
| 99 | |
| 100 | /* test just one char */ |
| 101 | n = iov_to_buf(iov, niov, i, obuf + i, 1); |
| 102 | g_assert(n == (i < sz)); |
| 103 | if (n) { |
| 104 | g_assert(obuf[i] == (i & 255)); |
| 105 | } |
| 106 | |
| 107 | for (j = i; j <= sz; ++j) { |
| 108 | /* now test num of bytes cap up to byte no. j, |
| 109 | * with j in [i..sz]. */ |
| 110 | |
| 111 | /* clear iovec */ |
Juan Quintela | e3ff9f0 | 2017-08-23 10:25:26 +0200 | [diff] [blame] | 112 | n = iov_memset(iov, niov, 0, 0xff, sz); |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 113 | g_assert(n == sz); |
| 114 | |
| 115 | /* copy bytes [i..j) from ibuf to iovec */ |
| 116 | n = iov_from_buf(iov, niov, i, ibuf + i, j - i); |
| 117 | g_assert(n == j - i); |
| 118 | |
| 119 | /* clear part of obuf */ |
| 120 | memset(obuf + i, 0, j - i); |
| 121 | |
| 122 | /* copy bytes [i..j) from iovec to obuf */ |
| 123 | n = iov_to_buf(iov, niov, i, obuf + i, j - i); |
| 124 | g_assert(n == j - i); |
| 125 | |
| 126 | /* verify result */ |
| 127 | g_assert(memcmp(ibuf, obuf, sz) == 0); |
| 128 | |
| 129 | /* now actually check if the iovec contains the right data */ |
| 130 | test_iov_bytes(iov, niov, i, j - i); |
| 131 | } |
| 132 | } |
| 133 | g_assert(!memcmp(ibuf-4, "aaaa", 4) && !memcmp(ibuf+sz, "bbbb", 4)); |
| 134 | g_free(ibuf-4); |
| 135 | g_assert(!memcmp(obuf-4, "xxxx", 4) && !memcmp(obuf+sz, "yyyy", 4)); |
| 136 | g_free(obuf-4); |
| 137 | iov_free(iov, niov); |
| 138 | } |
| 139 | |
| 140 | static void test_to_from_buf(void) |
| 141 | { |
| 142 | int x; |
| 143 | for (x = 0; x < 4; ++x) { |
| 144 | test_to_from_buf_1(); |
| 145 | } |
| 146 | } |
| 147 | |
Michael Tokarev | 25e5e4c | 2012-03-14 11:18:54 +0400 | [diff] [blame] | 148 | static void test_io(void) |
| 149 | { |
| 150 | #ifndef _WIN32 |
| 151 | /* socketpair(PF_UNIX) which does not exist on windows */ |
| 152 | |
| 153 | int sv[2]; |
| 154 | int r; |
| 155 | unsigned i, j, k, s, t; |
| 156 | fd_set fds; |
| 157 | unsigned niov; |
| 158 | struct iovec *iov, *siov; |
| 159 | unsigned char *buf; |
| 160 | size_t sz; |
| 161 | |
| 162 | iov_random(&iov, &niov); |
| 163 | sz = iov_size(iov, niov); |
| 164 | buf = g_malloc(sz); |
| 165 | for (i = 0; i < sz; ++i) { |
| 166 | buf[i] = i & 255; |
| 167 | } |
| 168 | iov_from_buf(iov, niov, 0, buf, sz); |
| 169 | |
Marc-André Lureau | 38cc1db | 2017-06-07 00:45:43 +0400 | [diff] [blame] | 170 | siov = g_memdup(iov, sizeof(*iov) * niov); |
Michael Tokarev | 25e5e4c | 2012-03-14 11:18:54 +0400 | [diff] [blame] | 171 | |
| 172 | if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) < 0) { |
| 173 | perror("socketpair"); |
| 174 | exit(1); |
| 175 | } |
| 176 | |
| 177 | FD_ZERO(&fds); |
| 178 | |
| 179 | t = 0; |
| 180 | if (fork() == 0) { |
| 181 | /* writer */ |
| 182 | |
| 183 | close(sv[0]); |
| 184 | FD_SET(sv[1], &fds); |
| 185 | fcntl(sv[1], F_SETFL, O_RDWR|O_NONBLOCK); |
| 186 | r = g_test_rand_int_range(sz / 2, sz); |
| 187 | setsockopt(sv[1], SOL_SOCKET, SO_SNDBUF, &r, sizeof(r)); |
| 188 | |
| 189 | for (i = 0; i <= sz; ++i) { |
| 190 | for (j = i; j <= sz; ++j) { |
| 191 | k = i; |
| 192 | do { |
| 193 | s = g_test_rand_int_range(0, j - k + 1); |
| 194 | r = iov_send(sv[1], iov, niov, k, s); |
| 195 | g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); |
| 196 | if (r >= 0) { |
| 197 | k += r; |
| 198 | t += r; |
| 199 | usleep(g_test_rand_int_range(0, 30)); |
| 200 | } else if (errno == EAGAIN) { |
| 201 | select(sv[1]+1, NULL, &fds, NULL, NULL); |
| 202 | continue; |
| 203 | } else { |
| 204 | perror("send"); |
| 205 | exit(1); |
| 206 | } |
| 207 | } while(k < j); |
| 208 | } |
| 209 | } |
Marc-André Lureau | d55f295 | 2016-07-07 21:00:05 +0200 | [diff] [blame] | 210 | iov_free(iov, niov); |
| 211 | g_free(buf); |
| 212 | g_free(siov); |
Michael Tokarev | 25e5e4c | 2012-03-14 11:18:54 +0400 | [diff] [blame] | 213 | exit(0); |
| 214 | |
| 215 | } else { |
| 216 | /* reader & verifier */ |
| 217 | |
| 218 | close(sv[1]); |
| 219 | FD_SET(sv[0], &fds); |
| 220 | fcntl(sv[0], F_SETFL, O_RDWR|O_NONBLOCK); |
| 221 | r = g_test_rand_int_range(sz / 2, sz); |
| 222 | setsockopt(sv[0], SOL_SOCKET, SO_RCVBUF, &r, sizeof(r)); |
| 223 | usleep(500000); |
| 224 | |
| 225 | for (i = 0; i <= sz; ++i) { |
| 226 | for (j = i; j <= sz; ++j) { |
| 227 | k = i; |
Juan Quintela | e3ff9f0 | 2017-08-23 10:25:26 +0200 | [diff] [blame] | 228 | iov_memset(iov, niov, 0, 0xff, sz); |
Michael Tokarev | 25e5e4c | 2012-03-14 11:18:54 +0400 | [diff] [blame] | 229 | do { |
| 230 | s = g_test_rand_int_range(0, j - k + 1); |
| 231 | r = iov_recv(sv[0], iov, niov, k, s); |
| 232 | g_assert(memcmp(iov, siov, sizeof(*iov)*niov) == 0); |
| 233 | if (r > 0) { |
| 234 | k += r; |
| 235 | t += r; |
| 236 | } else if (!r) { |
| 237 | if (s) { |
| 238 | break; |
| 239 | } |
| 240 | } else if (errno == EAGAIN) { |
| 241 | select(sv[0]+1, &fds, NULL, NULL, NULL); |
| 242 | continue; |
| 243 | } else { |
| 244 | perror("recv"); |
| 245 | exit(1); |
| 246 | } |
| 247 | } while(k < j); |
| 248 | test_iov_bytes(iov, niov, i, j - i); |
| 249 | } |
| 250 | } |
Marc-André Lureau | d55f295 | 2016-07-07 21:00:05 +0200 | [diff] [blame] | 251 | |
| 252 | iov_free(iov, niov); |
| 253 | g_free(buf); |
| 254 | g_free(siov); |
Michael Tokarev | 25e5e4c | 2012-03-14 11:18:54 +0400 | [diff] [blame] | 255 | } |
| 256 | #endif |
| 257 | } |
| 258 | |
Stefan Hajnoczi | 8962e44 | 2012-11-21 19:18:26 +0100 | [diff] [blame] | 259 | static void test_discard_front(void) |
| 260 | { |
| 261 | struct iovec *iov; |
| 262 | struct iovec *iov_tmp; |
| 263 | unsigned int iov_cnt; |
| 264 | unsigned int iov_cnt_tmp; |
| 265 | void *old_base; |
| 266 | size_t size; |
| 267 | size_t ret; |
| 268 | |
| 269 | /* Discard zero bytes */ |
| 270 | iov_random(&iov, &iov_cnt); |
| 271 | iov_tmp = iov; |
| 272 | iov_cnt_tmp = iov_cnt; |
| 273 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, 0); |
| 274 | g_assert(ret == 0); |
| 275 | g_assert(iov_tmp == iov); |
| 276 | g_assert(iov_cnt_tmp == iov_cnt); |
| 277 | iov_free(iov, iov_cnt); |
| 278 | |
| 279 | /* Discard more bytes than vector size */ |
| 280 | iov_random(&iov, &iov_cnt); |
| 281 | iov_tmp = iov; |
| 282 | iov_cnt_tmp = iov_cnt; |
| 283 | size = iov_size(iov, iov_cnt); |
| 284 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size + 1); |
| 285 | g_assert(ret == size); |
| 286 | g_assert(iov_cnt_tmp == 0); |
| 287 | iov_free(iov, iov_cnt); |
| 288 | |
| 289 | /* Discard entire vector */ |
| 290 | iov_random(&iov, &iov_cnt); |
| 291 | iov_tmp = iov; |
| 292 | iov_cnt_tmp = iov_cnt; |
| 293 | size = iov_size(iov, iov_cnt); |
| 294 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); |
| 295 | g_assert(ret == size); |
| 296 | g_assert(iov_cnt_tmp == 0); |
| 297 | iov_free(iov, iov_cnt); |
| 298 | |
| 299 | /* Discard within first element */ |
| 300 | iov_random(&iov, &iov_cnt); |
| 301 | iov_tmp = iov; |
| 302 | iov_cnt_tmp = iov_cnt; |
| 303 | old_base = iov->iov_base; |
| 304 | size = g_test_rand_int_range(1, iov->iov_len); |
| 305 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); |
| 306 | g_assert(ret == size); |
| 307 | g_assert(iov_tmp == iov); |
| 308 | g_assert(iov_cnt_tmp == iov_cnt); |
| 309 | g_assert(iov_tmp->iov_base == old_base + size); |
| 310 | iov_tmp->iov_base = old_base; /* undo before g_free() */ |
| 311 | iov_free(iov, iov_cnt); |
| 312 | |
| 313 | /* Discard entire first element */ |
| 314 | iov_random(&iov, &iov_cnt); |
| 315 | iov_tmp = iov; |
| 316 | iov_cnt_tmp = iov_cnt; |
| 317 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, iov->iov_len); |
| 318 | g_assert(ret == iov->iov_len); |
| 319 | g_assert(iov_tmp == iov + 1); |
| 320 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 321 | iov_free(iov, iov_cnt); |
| 322 | |
| 323 | /* Discard within second element */ |
| 324 | iov_random(&iov, &iov_cnt); |
| 325 | iov_tmp = iov; |
| 326 | iov_cnt_tmp = iov_cnt; |
| 327 | old_base = iov[1].iov_base; |
| 328 | size = iov->iov_len + g_test_rand_int_range(1, iov[1].iov_len); |
| 329 | ret = iov_discard_front(&iov_tmp, &iov_cnt_tmp, size); |
| 330 | g_assert(ret == size); |
| 331 | g_assert(iov_tmp == iov + 1); |
| 332 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 333 | g_assert(iov_tmp->iov_base == old_base + (size - iov->iov_len)); |
| 334 | iov_tmp->iov_base = old_base; /* undo before g_free() */ |
| 335 | iov_free(iov, iov_cnt); |
| 336 | } |
| 337 | |
| 338 | static void test_discard_back(void) |
| 339 | { |
| 340 | struct iovec *iov; |
| 341 | unsigned int iov_cnt; |
| 342 | unsigned int iov_cnt_tmp; |
| 343 | void *old_base; |
| 344 | size_t size; |
| 345 | size_t ret; |
| 346 | |
| 347 | /* Discard zero bytes */ |
| 348 | iov_random(&iov, &iov_cnt); |
| 349 | iov_cnt_tmp = iov_cnt; |
| 350 | ret = iov_discard_back(iov, &iov_cnt_tmp, 0); |
| 351 | g_assert(ret == 0); |
| 352 | g_assert(iov_cnt_tmp == iov_cnt); |
| 353 | iov_free(iov, iov_cnt); |
| 354 | |
| 355 | /* Discard more bytes than vector size */ |
| 356 | iov_random(&iov, &iov_cnt); |
| 357 | iov_cnt_tmp = iov_cnt; |
| 358 | size = iov_size(iov, iov_cnt); |
| 359 | ret = iov_discard_back(iov, &iov_cnt_tmp, size + 1); |
| 360 | g_assert(ret == size); |
| 361 | g_assert(iov_cnt_tmp == 0); |
| 362 | iov_free(iov, iov_cnt); |
| 363 | |
| 364 | /* Discard entire vector */ |
| 365 | iov_random(&iov, &iov_cnt); |
| 366 | iov_cnt_tmp = iov_cnt; |
| 367 | size = iov_size(iov, iov_cnt); |
| 368 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 369 | g_assert(ret == size); |
| 370 | g_assert(iov_cnt_tmp == 0); |
| 371 | iov_free(iov, iov_cnt); |
| 372 | |
| 373 | /* Discard within last element */ |
| 374 | iov_random(&iov, &iov_cnt); |
| 375 | iov_cnt_tmp = iov_cnt; |
| 376 | old_base = iov[iov_cnt - 1].iov_base; |
| 377 | size = g_test_rand_int_range(1, iov[iov_cnt - 1].iov_len); |
| 378 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 379 | g_assert(ret == size); |
| 380 | g_assert(iov_cnt_tmp == iov_cnt); |
| 381 | g_assert(iov[iov_cnt - 1].iov_base == old_base); |
| 382 | iov_free(iov, iov_cnt); |
| 383 | |
| 384 | /* Discard entire last element */ |
| 385 | iov_random(&iov, &iov_cnt); |
| 386 | iov_cnt_tmp = iov_cnt; |
| 387 | old_base = iov[iov_cnt - 1].iov_base; |
| 388 | size = iov[iov_cnt - 1].iov_len; |
| 389 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 390 | g_assert(ret == size); |
| 391 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 392 | iov_free(iov, iov_cnt); |
| 393 | |
| 394 | /* Discard within second-to-last element */ |
| 395 | iov_random(&iov, &iov_cnt); |
| 396 | iov_cnt_tmp = iov_cnt; |
| 397 | old_base = iov[iov_cnt - 2].iov_base; |
| 398 | size = iov[iov_cnt - 1].iov_len + |
| 399 | g_test_rand_int_range(1, iov[iov_cnt - 2].iov_len); |
| 400 | ret = iov_discard_back(iov, &iov_cnt_tmp, size); |
| 401 | g_assert(ret == size); |
| 402 | g_assert(iov_cnt_tmp == iov_cnt - 1); |
| 403 | g_assert(iov[iov_cnt - 2].iov_base == old_base); |
| 404 | iov_free(iov, iov_cnt); |
| 405 | } |
| 406 | |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 407 | int main(int argc, char **argv) |
| 408 | { |
| 409 | g_test_init(&argc, &argv, NULL); |
| 410 | g_test_rand_int(); |
| 411 | g_test_add_func("/basic/iov/from-to-buf", test_to_from_buf); |
Michael Tokarev | 25e5e4c | 2012-03-14 11:18:54 +0400 | [diff] [blame] | 412 | g_test_add_func("/basic/iov/io", test_io); |
Stefan Hajnoczi | 8962e44 | 2012-11-21 19:18:26 +0100 | [diff] [blame] | 413 | g_test_add_func("/basic/iov/discard-front", test_discard_front); |
| 414 | g_test_add_func("/basic/iov/discard-back", test_discard_back); |
Michael Tokarev | 2278a69 | 2012-06-07 20:08:19 +0400 | [diff] [blame] | 415 | return g_test_run(); |
| 416 | } |