1 /* 2 * Command line utility to exercise the QEMU I/O path. 3 * 4 * Copyright (C) 2009 Red Hat, Inc. 5 * Copyright (c) 2003-2005 Silicon Graphics, Inc. 6 * 7 * This work is licensed under the terms of the GNU GPL, version 2 or later. 8 * See the COPYING file in the top-level directory. 9 */ 10 11 #include "qemu/osdep.h" 12 #include "qapi/error.h" 13 #include "qemu-io.h" 14 #include "sysemu/block-backend.h" 15 #include "block/block.h" 16 #include "block/block_int.h" /* for info_f() */ 17 #include "block/qapi.h" 18 #include "qemu/error-report.h" 19 #include "qemu/main-loop.h" 20 #include "qemu/timer.h" 21 #include "sysemu/block-backend.h" 22 #include "qemu/cutils.h" 23 24 #define CMD_NOFILE_OK 0x01 25 26 bool qemuio_misalign; 27 28 static cmdinfo_t *cmdtab; 29 static int ncmds; 30 31 static int compare_cmdname(const void *a, const void *b) 32 { 33 return strcmp(((const cmdinfo_t *)a)->name, 34 ((const cmdinfo_t *)b)->name); 35 } 36 37 void qemuio_add_command(const cmdinfo_t *ci) 38 { 39 cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds); 40 cmdtab[ncmds - 1] = *ci; 41 qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname); 42 } 43 44 int qemuio_command_usage(const cmdinfo_t *ci) 45 { 46 printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline); 47 return 0; 48 } 49 50 static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct) 51 { 52 if (ct->flags & CMD_FLAG_GLOBAL) { 53 return 1; 54 } 55 if (!(ct->flags & CMD_NOFILE_OK) && !blk) { 56 fprintf(stderr, "no file open, try 'help open'\n"); 57 return 0; 58 } 59 return 1; 60 } 61 62 static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc, 63 char **argv) 64 { 65 char *cmd = argv[0]; 66 67 if (!init_check_command(blk, ct)) { 68 return 0; 69 } 70 71 if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) { 72 if (ct->argmax == -1) { 73 fprintf(stderr, 74 "bad argument count %d to %s, expected at least %d arguments\n", 75 argc-1, cmd, ct->argmin); 76 } else if (ct->argmin == ct->argmax) { 77 fprintf(stderr, 78 "bad argument count %d to %s, expected %d arguments\n", 79 argc-1, cmd, ct->argmin); 80 } else { 81 fprintf(stderr, 82 "bad argument count %d to %s, expected between %d and %d arguments\n", 83 argc-1, cmd, ct->argmin, ct->argmax); 84 } 85 return 0; 86 } 87 optind = 0; 88 return ct->cfunc(blk, argc, argv); 89 } 90 91 static const cmdinfo_t *find_command(const char *cmd) 92 { 93 cmdinfo_t *ct; 94 95 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { 96 if (strcmp(ct->name, cmd) == 0 || 97 (ct->altname && strcmp(ct->altname, cmd) == 0)) 98 { 99 return (const cmdinfo_t *)ct; 100 } 101 } 102 return NULL; 103 } 104 105 /* Invoke fn() for commands with a matching prefix */ 106 void qemuio_complete_command(const char *input, 107 void (*fn)(const char *cmd, void *opaque), 108 void *opaque) 109 { 110 cmdinfo_t *ct; 111 size_t input_len = strlen(input); 112 113 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { 114 if (strncmp(input, ct->name, input_len) == 0) { 115 fn(ct->name, opaque); 116 } 117 } 118 } 119 120 static char **breakline(char *input, int *count) 121 { 122 int c = 0; 123 char *p; 124 char **rval = g_new0(char *, 1); 125 126 while (rval && (p = qemu_strsep(&input, " ")) != NULL) { 127 if (!*p) { 128 continue; 129 } 130 c++; 131 rval = g_renew(char *, rval, (c + 1)); 132 rval[c - 1] = p; 133 rval[c] = NULL; 134 } 135 *count = c; 136 return rval; 137 } 138 139 static int64_t cvtnum(const char *s) 140 { 141 char *end; 142 int64_t ret; 143 144 ret = qemu_strtosz_suffix(s, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 145 if (*end != '\0') { 146 /* Detritus at the end of the string */ 147 return -EINVAL; 148 } 149 return ret; 150 } 151 152 static void print_cvtnum_err(int64_t rc, const char *arg) 153 { 154 switch (rc) { 155 case -EINVAL: 156 printf("Parsing error: non-numeric argument," 157 " or extraneous/unrecognized suffix -- %s\n", arg); 158 break; 159 case -ERANGE: 160 printf("Parsing error: argument too large -- %s\n", arg); 161 break; 162 default: 163 printf("Parsing error: %s\n", arg); 164 } 165 } 166 167 #define EXABYTES(x) ((long long)(x) << 60) 168 #define PETABYTES(x) ((long long)(x) << 50) 169 #define TERABYTES(x) ((long long)(x) << 40) 170 #define GIGABYTES(x) ((long long)(x) << 30) 171 #define MEGABYTES(x) ((long long)(x) << 20) 172 #define KILOBYTES(x) ((long long)(x) << 10) 173 174 #define TO_EXABYTES(x) ((x) / EXABYTES(1)) 175 #define TO_PETABYTES(x) ((x) / PETABYTES(1)) 176 #define TO_TERABYTES(x) ((x) / TERABYTES(1)) 177 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1)) 178 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1)) 179 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1)) 180 181 static void cvtstr(double value, char *str, size_t size) 182 { 183 char *trim; 184 const char *suffix; 185 186 if (value >= EXABYTES(1)) { 187 suffix = " EiB"; 188 snprintf(str, size - 4, "%.3f", TO_EXABYTES(value)); 189 } else if (value >= PETABYTES(1)) { 190 suffix = " PiB"; 191 snprintf(str, size - 4, "%.3f", TO_PETABYTES(value)); 192 } else if (value >= TERABYTES(1)) { 193 suffix = " TiB"; 194 snprintf(str, size - 4, "%.3f", TO_TERABYTES(value)); 195 } else if (value >= GIGABYTES(1)) { 196 suffix = " GiB"; 197 snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value)); 198 } else if (value >= MEGABYTES(1)) { 199 suffix = " MiB"; 200 snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value)); 201 } else if (value >= KILOBYTES(1)) { 202 suffix = " KiB"; 203 snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value)); 204 } else { 205 suffix = " bytes"; 206 snprintf(str, size - 6, "%f", value); 207 } 208 209 trim = strstr(str, ".000"); 210 if (trim) { 211 strcpy(trim, suffix); 212 } else { 213 strcat(str, suffix); 214 } 215 } 216 217 218 219 static struct timeval tsub(struct timeval t1, struct timeval t2) 220 { 221 t1.tv_usec -= t2.tv_usec; 222 if (t1.tv_usec < 0) { 223 t1.tv_usec += 1000000; 224 t1.tv_sec--; 225 } 226 t1.tv_sec -= t2.tv_sec; 227 return t1; 228 } 229 230 static double tdiv(double value, struct timeval tv) 231 { 232 return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0)); 233 } 234 235 #define HOURS(sec) ((sec) / (60 * 60)) 236 #define MINUTES(sec) (((sec) % (60 * 60)) / 60) 237 #define SECONDS(sec) ((sec) % 60) 238 239 enum { 240 DEFAULT_TIME = 0x0, 241 TERSE_FIXED_TIME = 0x1, 242 VERBOSE_FIXED_TIME = 0x2, 243 }; 244 245 static void timestr(struct timeval *tv, char *ts, size_t size, int format) 246 { 247 double usec = (double)tv->tv_usec / 1000000.0; 248 249 if (format & TERSE_FIXED_TIME) { 250 if (!HOURS(tv->tv_sec)) { 251 snprintf(ts, size, "%u:%02u.%02u", 252 (unsigned int) MINUTES(tv->tv_sec), 253 (unsigned int) SECONDS(tv->tv_sec), 254 (unsigned int) (usec * 100)); 255 return; 256 } 257 format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */ 258 } 259 260 if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) { 261 snprintf(ts, size, "%u:%02u:%02u.%02u", 262 (unsigned int) HOURS(tv->tv_sec), 263 (unsigned int) MINUTES(tv->tv_sec), 264 (unsigned int) SECONDS(tv->tv_sec), 265 (unsigned int) (usec * 100)); 266 } else { 267 snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000)); 268 } 269 } 270 271 /* 272 * Parse the pattern argument to various sub-commands. 273 * 274 * Because the pattern is used as an argument to memset it must evaluate 275 * to an unsigned integer that fits into a single byte. 276 */ 277 static int parse_pattern(const char *arg) 278 { 279 char *endptr = NULL; 280 long pattern; 281 282 pattern = strtol(arg, &endptr, 0); 283 if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') { 284 printf("%s is not a valid pattern byte\n", arg); 285 return -1; 286 } 287 288 return pattern; 289 } 290 291 /* 292 * Memory allocation helpers. 293 * 294 * Make sure memory is aligned by default, or purposefully misaligned if 295 * that is specified on the command line. 296 */ 297 298 #define MISALIGN_OFFSET 16 299 static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern) 300 { 301 void *buf; 302 303 if (qemuio_misalign) { 304 len += MISALIGN_OFFSET; 305 } 306 buf = blk_blockalign(blk, len); 307 memset(buf, pattern, len); 308 if (qemuio_misalign) { 309 buf += MISALIGN_OFFSET; 310 } 311 return buf; 312 } 313 314 static void qemu_io_free(void *p) 315 { 316 if (qemuio_misalign) { 317 p -= MISALIGN_OFFSET; 318 } 319 qemu_vfree(p); 320 } 321 322 static void dump_buffer(const void *buffer, int64_t offset, int64_t len) 323 { 324 uint64_t i; 325 int j; 326 const uint8_t *p; 327 328 for (i = 0, p = buffer; i < len; i += 16) { 329 const uint8_t *s = p; 330 331 printf("%08" PRIx64 ": ", offset + i); 332 for (j = 0; j < 16 && i + j < len; j++, p++) { 333 printf("%02x ", *p); 334 } 335 printf(" "); 336 for (j = 0; j < 16 && i + j < len; j++, s++) { 337 if (isalnum(*s)) { 338 printf("%c", *s); 339 } else { 340 printf("."); 341 } 342 } 343 printf("\n"); 344 } 345 } 346 347 static void print_report(const char *op, struct timeval *t, int64_t offset, 348 int64_t count, int64_t total, int cnt, int Cflag) 349 { 350 char s1[64], s2[64], ts[64]; 351 352 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0); 353 if (!Cflag) { 354 cvtstr((double)total, s1, sizeof(s1)); 355 cvtstr(tdiv((double)total, *t), s2, sizeof(s2)); 356 printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n", 357 op, total, count, offset); 358 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n", 359 s1, cnt, ts, s2, tdiv((double)cnt, *t)); 360 } else {/* bytes,ops,time,bytes/sec,ops/sec */ 361 printf("%"PRId64",%d,%s,%.3f,%.3f\n", 362 total, cnt, ts, 363 tdiv((double)total, *t), 364 tdiv((double)cnt, *t)); 365 } 366 } 367 368 /* 369 * Parse multiple length statements for vectored I/O, and construct an I/O 370 * vector matching it. 371 */ 372 static void * 373 create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov, 374 int pattern) 375 { 376 size_t *sizes = g_new0(size_t, nr_iov); 377 size_t count = 0; 378 void *buf = NULL; 379 void *p; 380 int i; 381 382 for (i = 0; i < nr_iov; i++) { 383 char *arg = argv[i]; 384 int64_t len; 385 386 len = cvtnum(arg); 387 if (len < 0) { 388 print_cvtnum_err(len, arg); 389 goto fail; 390 } 391 392 /* should be SIZE_T_MAX, but that doesn't exist */ 393 if (len > INT_MAX) { 394 printf("Argument '%s' exceeds maximum size %d\n", arg, INT_MAX); 395 goto fail; 396 } 397 398 if (len & 0x1ff) { 399 printf("length argument %" PRId64 400 " is not sector aligned\n", len); 401 goto fail; 402 } 403 404 sizes[i] = len; 405 count += len; 406 } 407 408 qemu_iovec_init(qiov, nr_iov); 409 410 buf = p = qemu_io_alloc(blk, count, pattern); 411 412 for (i = 0; i < nr_iov; i++) { 413 qemu_iovec_add(qiov, p, sizes[i]); 414 p += sizes[i]; 415 } 416 417 fail: 418 g_free(sizes); 419 return buf; 420 } 421 422 static int do_read(BlockBackend *blk, char *buf, int64_t offset, int64_t count, 423 int64_t *total) 424 { 425 int ret; 426 427 if (count >> 9 > INT_MAX) { 428 return -ERANGE; 429 } 430 431 ret = blk_read(blk, offset >> 9, (uint8_t *)buf, count >> 9); 432 if (ret < 0) { 433 return ret; 434 } 435 *total = count; 436 return 1; 437 } 438 439 static int do_write(BlockBackend *blk, char *buf, int64_t offset, int64_t count, 440 int64_t *total) 441 { 442 int ret; 443 444 if (count >> 9 > INT_MAX) { 445 return -ERANGE; 446 } 447 448 ret = blk_write(blk, offset >> 9, (uint8_t *)buf, count >> 9); 449 if (ret < 0) { 450 return ret; 451 } 452 *total = count; 453 return 1; 454 } 455 456 static int do_pread(BlockBackend *blk, char *buf, int64_t offset, 457 int64_t count, int64_t *total) 458 { 459 if (count > INT_MAX) { 460 return -ERANGE; 461 } 462 463 *total = blk_pread(blk, offset, (uint8_t *)buf, count); 464 if (*total < 0) { 465 return *total; 466 } 467 return 1; 468 } 469 470 static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, 471 int64_t count, int64_t *total) 472 { 473 if (count > INT_MAX) { 474 return -ERANGE; 475 } 476 477 *total = blk_pwrite(blk, offset, (uint8_t *)buf, count); 478 if (*total < 0) { 479 return *total; 480 } 481 return 1; 482 } 483 484 typedef struct { 485 BlockBackend *blk; 486 int64_t offset; 487 int64_t count; 488 int64_t *total; 489 int ret; 490 bool done; 491 } CoWriteZeroes; 492 493 static void coroutine_fn co_write_zeroes_entry(void *opaque) 494 { 495 CoWriteZeroes *data = opaque; 496 497 data->ret = blk_co_write_zeroes(data->blk, data->offset / BDRV_SECTOR_SIZE, 498 data->count / BDRV_SECTOR_SIZE, 0); 499 data->done = true; 500 if (data->ret < 0) { 501 *data->total = data->ret; 502 return; 503 } 504 505 *data->total = data->count; 506 } 507 508 static int do_co_write_zeroes(BlockBackend *blk, int64_t offset, int64_t count, 509 int64_t *total) 510 { 511 Coroutine *co; 512 CoWriteZeroes data = { 513 .blk = blk, 514 .offset = offset, 515 .count = count, 516 .total = total, 517 .done = false, 518 }; 519 520 if (count >> BDRV_SECTOR_BITS > INT_MAX) { 521 return -ERANGE; 522 } 523 524 co = qemu_coroutine_create(co_write_zeroes_entry); 525 qemu_coroutine_enter(co, &data); 526 while (!data.done) { 527 aio_poll(blk_get_aio_context(blk), true); 528 } 529 if (data.ret < 0) { 530 return data.ret; 531 } else { 532 return 1; 533 } 534 } 535 536 static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset, 537 int64_t count, int64_t *total) 538 { 539 int ret; 540 541 if (count >> 9 > INT_MAX) { 542 return -ERANGE; 543 } 544 545 ret = blk_write_compressed(blk, offset >> 9, (uint8_t *)buf, count >> 9); 546 if (ret < 0) { 547 return ret; 548 } 549 *total = count; 550 return 1; 551 } 552 553 static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset, 554 int64_t count, int64_t *total) 555 { 556 if (count > INT_MAX) { 557 return -ERANGE; 558 } 559 560 *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count); 561 if (*total < 0) { 562 return *total; 563 } 564 return 1; 565 } 566 567 static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset, 568 int64_t count, int64_t *total) 569 { 570 if (count > INT_MAX) { 571 return -ERANGE; 572 } 573 574 *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count); 575 if (*total < 0) { 576 return *total; 577 } 578 return 1; 579 } 580 581 #define NOT_DONE 0x7fffffff 582 static void aio_rw_done(void *opaque, int ret) 583 { 584 *(int *)opaque = ret; 585 } 586 587 static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov, 588 int64_t offset, int *total) 589 { 590 int async_ret = NOT_DONE; 591 592 blk_aio_readv(blk, offset >> 9, qiov, qiov->size >> 9, 593 aio_rw_done, &async_ret); 594 while (async_ret == NOT_DONE) { 595 main_loop_wait(false); 596 } 597 598 *total = qiov->size; 599 return async_ret < 0 ? async_ret : 1; 600 } 601 602 static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov, 603 int64_t offset, int *total) 604 { 605 int async_ret = NOT_DONE; 606 607 blk_aio_writev(blk, offset >> 9, qiov, qiov->size >> 9, 608 aio_rw_done, &async_ret); 609 while (async_ret == NOT_DONE) { 610 main_loop_wait(false); 611 } 612 613 *total = qiov->size; 614 return async_ret < 0 ? async_ret : 1; 615 } 616 617 struct multiwrite_async_ret { 618 int num_done; 619 int error; 620 }; 621 622 static void multiwrite_cb(void *opaque, int ret) 623 { 624 struct multiwrite_async_ret *async_ret = opaque; 625 626 async_ret->num_done++; 627 if (ret < 0) { 628 async_ret->error = ret; 629 } 630 } 631 632 static int do_aio_multiwrite(BlockBackend *blk, BlockRequest* reqs, 633 int num_reqs, int *total) 634 { 635 int i, ret; 636 struct multiwrite_async_ret async_ret = { 637 .num_done = 0, 638 .error = 0, 639 }; 640 641 *total = 0; 642 for (i = 0; i < num_reqs; i++) { 643 reqs[i].cb = multiwrite_cb; 644 reqs[i].opaque = &async_ret; 645 *total += reqs[i].qiov->size; 646 } 647 648 ret = blk_aio_multiwrite(blk, reqs, num_reqs); 649 if (ret < 0) { 650 return ret; 651 } 652 653 while (async_ret.num_done < num_reqs) { 654 main_loop_wait(false); 655 } 656 657 return async_ret.error < 0 ? async_ret.error : 1; 658 } 659 660 static void read_help(void) 661 { 662 printf( 663 "\n" 664 " reads a range of bytes from the given offset\n" 665 "\n" 666 " Example:\n" 667 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n" 668 "\n" 669 " Reads a segment of the currently open file, optionally dumping it to the\n" 670 " standard output stream (with -v option) for subsequent inspection.\n" 671 " -b, -- read from the VM state rather than the virtual disk\n" 672 " -C, -- report statistics in a machine parsable format\n" 673 " -l, -- length for pattern verification (only with -P)\n" 674 " -p, -- use blk_pread to read the file\n" 675 " -P, -- use a pattern to verify read data\n" 676 " -q, -- quiet mode, do not show I/O statistics\n" 677 " -s, -- start offset for pattern verification (only with -P)\n" 678 " -v, -- dump buffer to standard output\n" 679 "\n"); 680 } 681 682 static int read_f(BlockBackend *blk, int argc, char **argv); 683 684 static const cmdinfo_t read_cmd = { 685 .name = "read", 686 .altname = "r", 687 .cfunc = read_f, 688 .argmin = 2, 689 .argmax = -1, 690 .args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len", 691 .oneline = "reads a number of bytes at a specified offset", 692 .help = read_help, 693 }; 694 695 static int read_f(BlockBackend *blk, int argc, char **argv) 696 { 697 struct timeval t1, t2; 698 int Cflag = 0, pflag = 0, qflag = 0, vflag = 0; 699 int Pflag = 0, sflag = 0, lflag = 0, bflag = 0; 700 int c, cnt; 701 char *buf; 702 int64_t offset; 703 int64_t count; 704 /* Some compilers get confused and warn if this is not initialized. */ 705 int64_t total = 0; 706 int pattern = 0; 707 int64_t pattern_offset = 0, pattern_count = 0; 708 709 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) { 710 switch (c) { 711 case 'b': 712 bflag = 1; 713 break; 714 case 'C': 715 Cflag = 1; 716 break; 717 case 'l': 718 lflag = 1; 719 pattern_count = cvtnum(optarg); 720 if (pattern_count < 0) { 721 print_cvtnum_err(pattern_count, optarg); 722 return 0; 723 } 724 break; 725 case 'p': 726 pflag = 1; 727 break; 728 case 'P': 729 Pflag = 1; 730 pattern = parse_pattern(optarg); 731 if (pattern < 0) { 732 return 0; 733 } 734 break; 735 case 'q': 736 qflag = 1; 737 break; 738 case 's': 739 sflag = 1; 740 pattern_offset = cvtnum(optarg); 741 if (pattern_offset < 0) { 742 print_cvtnum_err(pattern_offset, optarg); 743 return 0; 744 } 745 break; 746 case 'v': 747 vflag = 1; 748 break; 749 default: 750 return qemuio_command_usage(&read_cmd); 751 } 752 } 753 754 if (optind != argc - 2) { 755 return qemuio_command_usage(&read_cmd); 756 } 757 758 if (bflag && pflag) { 759 printf("-b and -p cannot be specified at the same time\n"); 760 return 0; 761 } 762 763 offset = cvtnum(argv[optind]); 764 if (offset < 0) { 765 print_cvtnum_err(offset, argv[optind]); 766 return 0; 767 } 768 769 optind++; 770 count = cvtnum(argv[optind]); 771 if (count < 0) { 772 print_cvtnum_err(count, argv[optind]); 773 return 0; 774 } else if (count > SIZE_MAX) { 775 printf("length cannot exceed %" PRIu64 ", given %s\n", 776 (uint64_t) SIZE_MAX, argv[optind]); 777 return 0; 778 } 779 780 if (!Pflag && (lflag || sflag)) { 781 return qemuio_command_usage(&read_cmd); 782 } 783 784 if (!lflag) { 785 pattern_count = count - pattern_offset; 786 } 787 788 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) { 789 printf("pattern verification range exceeds end of read data\n"); 790 return 0; 791 } 792 793 if (!pflag) { 794 if (offset & 0x1ff) { 795 printf("offset %" PRId64 " is not sector aligned\n", 796 offset); 797 return 0; 798 } 799 if (count & 0x1ff) { 800 printf("count %"PRId64" is not sector aligned\n", 801 count); 802 return 0; 803 } 804 } 805 806 buf = qemu_io_alloc(blk, count, 0xab); 807 808 gettimeofday(&t1, NULL); 809 if (pflag) { 810 cnt = do_pread(blk, buf, offset, count, &total); 811 } else if (bflag) { 812 cnt = do_load_vmstate(blk, buf, offset, count, &total); 813 } else { 814 cnt = do_read(blk, buf, offset, count, &total); 815 } 816 gettimeofday(&t2, NULL); 817 818 if (cnt < 0) { 819 printf("read failed: %s\n", strerror(-cnt)); 820 goto out; 821 } 822 823 if (Pflag) { 824 void *cmp_buf = g_malloc(pattern_count); 825 memset(cmp_buf, pattern, pattern_count); 826 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) { 827 printf("Pattern verification failed at offset %" 828 PRId64 ", %"PRId64" bytes\n", 829 offset + pattern_offset, pattern_count); 830 } 831 g_free(cmp_buf); 832 } 833 834 if (qflag) { 835 goto out; 836 } 837 838 if (vflag) { 839 dump_buffer(buf, offset, count); 840 } 841 842 /* Finally, report back -- -C gives a parsable format */ 843 t2 = tsub(t2, t1); 844 print_report("read", &t2, offset, count, total, cnt, Cflag); 845 846 out: 847 qemu_io_free(buf); 848 849 return 0; 850 } 851 852 static void readv_help(void) 853 { 854 printf( 855 "\n" 856 " reads a range of bytes from the given offset into multiple buffers\n" 857 "\n" 858 " Example:\n" 859 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" 860 "\n" 861 " Reads a segment of the currently open file, optionally dumping it to the\n" 862 " standard output stream (with -v option) for subsequent inspection.\n" 863 " Uses multiple iovec buffers if more than one byte range is specified.\n" 864 " -C, -- report statistics in a machine parsable format\n" 865 " -P, -- use a pattern to verify read data\n" 866 " -v, -- dump buffer to standard output\n" 867 " -q, -- quiet mode, do not show I/O statistics\n" 868 "\n"); 869 } 870 871 static int readv_f(BlockBackend *blk, int argc, char **argv); 872 873 static const cmdinfo_t readv_cmd = { 874 .name = "readv", 875 .cfunc = readv_f, 876 .argmin = 2, 877 .argmax = -1, 878 .args = "[-Cqv] [-P pattern ] off len [len..]", 879 .oneline = "reads a number of bytes at a specified offset", 880 .help = readv_help, 881 }; 882 883 static int readv_f(BlockBackend *blk, int argc, char **argv) 884 { 885 struct timeval t1, t2; 886 int Cflag = 0, qflag = 0, vflag = 0; 887 int c, cnt; 888 char *buf; 889 int64_t offset; 890 /* Some compilers get confused and warn if this is not initialized. */ 891 int total = 0; 892 int nr_iov; 893 QEMUIOVector qiov; 894 int pattern = 0; 895 int Pflag = 0; 896 897 while ((c = getopt(argc, argv, "CP:qv")) != -1) { 898 switch (c) { 899 case 'C': 900 Cflag = 1; 901 break; 902 case 'P': 903 Pflag = 1; 904 pattern = parse_pattern(optarg); 905 if (pattern < 0) { 906 return 0; 907 } 908 break; 909 case 'q': 910 qflag = 1; 911 break; 912 case 'v': 913 vflag = 1; 914 break; 915 default: 916 return qemuio_command_usage(&readv_cmd); 917 } 918 } 919 920 if (optind > argc - 2) { 921 return qemuio_command_usage(&readv_cmd); 922 } 923 924 925 offset = cvtnum(argv[optind]); 926 if (offset < 0) { 927 print_cvtnum_err(offset, argv[optind]); 928 return 0; 929 } 930 optind++; 931 932 if (offset & 0x1ff) { 933 printf("offset %" PRId64 " is not sector aligned\n", 934 offset); 935 return 0; 936 } 937 938 nr_iov = argc - optind; 939 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab); 940 if (buf == NULL) { 941 return 0; 942 } 943 944 gettimeofday(&t1, NULL); 945 cnt = do_aio_readv(blk, &qiov, offset, &total); 946 gettimeofday(&t2, NULL); 947 948 if (cnt < 0) { 949 printf("readv failed: %s\n", strerror(-cnt)); 950 goto out; 951 } 952 953 if (Pflag) { 954 void *cmp_buf = g_malloc(qiov.size); 955 memset(cmp_buf, pattern, qiov.size); 956 if (memcmp(buf, cmp_buf, qiov.size)) { 957 printf("Pattern verification failed at offset %" 958 PRId64 ", %zd bytes\n", offset, qiov.size); 959 } 960 g_free(cmp_buf); 961 } 962 963 if (qflag) { 964 goto out; 965 } 966 967 if (vflag) { 968 dump_buffer(buf, offset, qiov.size); 969 } 970 971 /* Finally, report back -- -C gives a parsable format */ 972 t2 = tsub(t2, t1); 973 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag); 974 975 out: 976 qemu_iovec_destroy(&qiov); 977 qemu_io_free(buf); 978 return 0; 979 } 980 981 static void write_help(void) 982 { 983 printf( 984 "\n" 985 " writes a range of bytes from the given offset\n" 986 "\n" 987 " Example:\n" 988 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n" 989 "\n" 990 " Writes into a segment of the currently open file, using a buffer\n" 991 " filled with a set pattern (0xcdcdcdcd).\n" 992 " -b, -- write to the VM state rather than the virtual disk\n" 993 " -c, -- write compressed data with blk_write_compressed\n" 994 " -p, -- use blk_pwrite to write the file\n" 995 " -P, -- use different pattern to fill file\n" 996 " -C, -- report statistics in a machine parsable format\n" 997 " -q, -- quiet mode, do not show I/O statistics\n" 998 " -z, -- write zeroes using blk_co_write_zeroes\n" 999 "\n"); 1000 } 1001 1002 static int write_f(BlockBackend *blk, int argc, char **argv); 1003 1004 static const cmdinfo_t write_cmd = { 1005 .name = "write", 1006 .altname = "w", 1007 .cfunc = write_f, 1008 .argmin = 2, 1009 .argmax = -1, 1010 .args = "[-bcCpqz] [-P pattern ] off len", 1011 .oneline = "writes a number of bytes at a specified offset", 1012 .help = write_help, 1013 }; 1014 1015 static int write_f(BlockBackend *blk, int argc, char **argv) 1016 { 1017 struct timeval t1, t2; 1018 int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0; 1019 int cflag = 0; 1020 int c, cnt; 1021 char *buf = NULL; 1022 int64_t offset; 1023 int64_t count; 1024 /* Some compilers get confused and warn if this is not initialized. */ 1025 int64_t total = 0; 1026 int pattern = 0xcd; 1027 1028 while ((c = getopt(argc, argv, "bcCpP:qz")) != -1) { 1029 switch (c) { 1030 case 'b': 1031 bflag = 1; 1032 break; 1033 case 'c': 1034 cflag = 1; 1035 break; 1036 case 'C': 1037 Cflag = 1; 1038 break; 1039 case 'p': 1040 pflag = 1; 1041 break; 1042 case 'P': 1043 Pflag = 1; 1044 pattern = parse_pattern(optarg); 1045 if (pattern < 0) { 1046 return 0; 1047 } 1048 break; 1049 case 'q': 1050 qflag = 1; 1051 break; 1052 case 'z': 1053 zflag = 1; 1054 break; 1055 default: 1056 return qemuio_command_usage(&write_cmd); 1057 } 1058 } 1059 1060 if (optind != argc - 2) { 1061 return qemuio_command_usage(&write_cmd); 1062 } 1063 1064 if (bflag + pflag + zflag > 1) { 1065 printf("-b, -p, or -z cannot be specified at the same time\n"); 1066 return 0; 1067 } 1068 1069 if (zflag && Pflag) { 1070 printf("-z and -P cannot be specified at the same time\n"); 1071 return 0; 1072 } 1073 1074 offset = cvtnum(argv[optind]); 1075 if (offset < 0) { 1076 print_cvtnum_err(offset, argv[optind]); 1077 return 0; 1078 } 1079 1080 optind++; 1081 count = cvtnum(argv[optind]); 1082 if (count < 0) { 1083 print_cvtnum_err(count, argv[optind]); 1084 return 0; 1085 } else if (count > SIZE_MAX) { 1086 printf("length cannot exceed %" PRIu64 ", given %s\n", 1087 (uint64_t) SIZE_MAX, argv[optind]); 1088 return 0; 1089 } 1090 1091 if (!pflag) { 1092 if (offset & 0x1ff) { 1093 printf("offset %" PRId64 " is not sector aligned\n", 1094 offset); 1095 return 0; 1096 } 1097 1098 if (count & 0x1ff) { 1099 printf("count %"PRId64" is not sector aligned\n", 1100 count); 1101 return 0; 1102 } 1103 } 1104 1105 if (!zflag) { 1106 buf = qemu_io_alloc(blk, count, pattern); 1107 } 1108 1109 gettimeofday(&t1, NULL); 1110 if (pflag) { 1111 cnt = do_pwrite(blk, buf, offset, count, &total); 1112 } else if (bflag) { 1113 cnt = do_save_vmstate(blk, buf, offset, count, &total); 1114 } else if (zflag) { 1115 cnt = do_co_write_zeroes(blk, offset, count, &total); 1116 } else if (cflag) { 1117 cnt = do_write_compressed(blk, buf, offset, count, &total); 1118 } else { 1119 cnt = do_write(blk, buf, offset, count, &total); 1120 } 1121 gettimeofday(&t2, NULL); 1122 1123 if (cnt < 0) { 1124 printf("write failed: %s\n", strerror(-cnt)); 1125 goto out; 1126 } 1127 1128 if (qflag) { 1129 goto out; 1130 } 1131 1132 /* Finally, report back -- -C gives a parsable format */ 1133 t2 = tsub(t2, t1); 1134 print_report("wrote", &t2, offset, count, total, cnt, Cflag); 1135 1136 out: 1137 if (!zflag) { 1138 qemu_io_free(buf); 1139 } 1140 1141 return 0; 1142 } 1143 1144 static void 1145 writev_help(void) 1146 { 1147 printf( 1148 "\n" 1149 " writes a range of bytes from the given offset source from multiple buffers\n" 1150 "\n" 1151 " Example:\n" 1152 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" 1153 "\n" 1154 " Writes into a segment of the currently open file, using a buffer\n" 1155 " filled with a set pattern (0xcdcdcdcd).\n" 1156 " -P, -- use different pattern to fill file\n" 1157 " -C, -- report statistics in a machine parsable format\n" 1158 " -q, -- quiet mode, do not show I/O statistics\n" 1159 "\n"); 1160 } 1161 1162 static int writev_f(BlockBackend *blk, int argc, char **argv); 1163 1164 static const cmdinfo_t writev_cmd = { 1165 .name = "writev", 1166 .cfunc = writev_f, 1167 .argmin = 2, 1168 .argmax = -1, 1169 .args = "[-Cq] [-P pattern ] off len [len..]", 1170 .oneline = "writes a number of bytes at a specified offset", 1171 .help = writev_help, 1172 }; 1173 1174 static int writev_f(BlockBackend *blk, int argc, char **argv) 1175 { 1176 struct timeval t1, t2; 1177 int Cflag = 0, qflag = 0; 1178 int c, cnt; 1179 char *buf; 1180 int64_t offset; 1181 /* Some compilers get confused and warn if this is not initialized. */ 1182 int total = 0; 1183 int nr_iov; 1184 int pattern = 0xcd; 1185 QEMUIOVector qiov; 1186 1187 while ((c = getopt(argc, argv, "CqP:")) != -1) { 1188 switch (c) { 1189 case 'C': 1190 Cflag = 1; 1191 break; 1192 case 'q': 1193 qflag = 1; 1194 break; 1195 case 'P': 1196 pattern = parse_pattern(optarg); 1197 if (pattern < 0) { 1198 return 0; 1199 } 1200 break; 1201 default: 1202 return qemuio_command_usage(&writev_cmd); 1203 } 1204 } 1205 1206 if (optind > argc - 2) { 1207 return qemuio_command_usage(&writev_cmd); 1208 } 1209 1210 offset = cvtnum(argv[optind]); 1211 if (offset < 0) { 1212 print_cvtnum_err(offset, argv[optind]); 1213 return 0; 1214 } 1215 optind++; 1216 1217 if (offset & 0x1ff) { 1218 printf("offset %" PRId64 " is not sector aligned\n", 1219 offset); 1220 return 0; 1221 } 1222 1223 nr_iov = argc - optind; 1224 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern); 1225 if (buf == NULL) { 1226 return 0; 1227 } 1228 1229 gettimeofday(&t1, NULL); 1230 cnt = do_aio_writev(blk, &qiov, offset, &total); 1231 gettimeofday(&t2, NULL); 1232 1233 if (cnt < 0) { 1234 printf("writev failed: %s\n", strerror(-cnt)); 1235 goto out; 1236 } 1237 1238 if (qflag) { 1239 goto out; 1240 } 1241 1242 /* Finally, report back -- -C gives a parsable format */ 1243 t2 = tsub(t2, t1); 1244 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); 1245 out: 1246 qemu_iovec_destroy(&qiov); 1247 qemu_io_free(buf); 1248 return 0; 1249 } 1250 1251 static void multiwrite_help(void) 1252 { 1253 printf( 1254 "\n" 1255 " writes a range of bytes from the given offset source from multiple buffers,\n" 1256 " in a batch of requests that may be merged by qemu\n" 1257 "\n" 1258 " Example:\n" 1259 " 'multiwrite 512 1k 1k ; 4k 1k'\n" 1260 " writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n" 1261 "\n" 1262 " Writes into a segment of the currently open file, using a buffer\n" 1263 " filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n" 1264 " by one for each request contained in the multiwrite command.\n" 1265 " -P, -- use different pattern to fill file\n" 1266 " -C, -- report statistics in a machine parsable format\n" 1267 " -q, -- quiet mode, do not show I/O statistics\n" 1268 "\n"); 1269 } 1270 1271 static int multiwrite_f(BlockBackend *blk, int argc, char **argv); 1272 1273 static const cmdinfo_t multiwrite_cmd = { 1274 .name = "multiwrite", 1275 .cfunc = multiwrite_f, 1276 .argmin = 2, 1277 .argmax = -1, 1278 .args = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]", 1279 .oneline = "issues multiple write requests at once", 1280 .help = multiwrite_help, 1281 }; 1282 1283 static int multiwrite_f(BlockBackend *blk, int argc, char **argv) 1284 { 1285 struct timeval t1, t2; 1286 int Cflag = 0, qflag = 0; 1287 int c, cnt; 1288 char **buf; 1289 int64_t offset, first_offset = 0; 1290 /* Some compilers get confused and warn if this is not initialized. */ 1291 int total = 0; 1292 int nr_iov; 1293 int nr_reqs; 1294 int pattern = 0xcd; 1295 QEMUIOVector *qiovs; 1296 int i; 1297 BlockRequest *reqs; 1298 1299 while ((c = getopt(argc, argv, "CqP:")) != -1) { 1300 switch (c) { 1301 case 'C': 1302 Cflag = 1; 1303 break; 1304 case 'q': 1305 qflag = 1; 1306 break; 1307 case 'P': 1308 pattern = parse_pattern(optarg); 1309 if (pattern < 0) { 1310 return 0; 1311 } 1312 break; 1313 default: 1314 return qemuio_command_usage(&writev_cmd); 1315 } 1316 } 1317 1318 if (optind > argc - 2) { 1319 return qemuio_command_usage(&writev_cmd); 1320 } 1321 1322 nr_reqs = 1; 1323 for (i = optind; i < argc; i++) { 1324 if (!strcmp(argv[i], ";")) { 1325 nr_reqs++; 1326 } 1327 } 1328 1329 reqs = g_new0(BlockRequest, nr_reqs); 1330 buf = g_new0(char *, nr_reqs); 1331 qiovs = g_new(QEMUIOVector, nr_reqs); 1332 1333 for (i = 0; i < nr_reqs && optind < argc; i++) { 1334 int j; 1335 1336 /* Read the offset of the request */ 1337 offset = cvtnum(argv[optind]); 1338 if (offset < 0) { 1339 print_cvtnum_err(offset, argv[optind]); 1340 goto out; 1341 } 1342 optind++; 1343 1344 if (offset & 0x1ff) { 1345 printf("offset %lld is not sector aligned\n", 1346 (long long)offset); 1347 goto out; 1348 } 1349 1350 if (i == 0) { 1351 first_offset = offset; 1352 } 1353 1354 /* Read lengths for qiov entries */ 1355 for (j = optind; j < argc; j++) { 1356 if (!strcmp(argv[j], ";")) { 1357 break; 1358 } 1359 } 1360 1361 nr_iov = j - optind; 1362 1363 /* Build request */ 1364 buf[i] = create_iovec(blk, &qiovs[i], &argv[optind], nr_iov, pattern); 1365 if (buf[i] == NULL) { 1366 goto out; 1367 } 1368 1369 reqs[i].qiov = &qiovs[i]; 1370 reqs[i].sector = offset >> 9; 1371 reqs[i].nb_sectors = reqs[i].qiov->size >> 9; 1372 1373 optind = j + 1; 1374 1375 pattern++; 1376 } 1377 1378 /* If there were empty requests at the end, ignore them */ 1379 nr_reqs = i; 1380 1381 gettimeofday(&t1, NULL); 1382 cnt = do_aio_multiwrite(blk, reqs, nr_reqs, &total); 1383 gettimeofday(&t2, NULL); 1384 1385 if (cnt < 0) { 1386 printf("aio_multiwrite failed: %s\n", strerror(-cnt)); 1387 goto out; 1388 } 1389 1390 if (qflag) { 1391 goto out; 1392 } 1393 1394 /* Finally, report back -- -C gives a parsable format */ 1395 t2 = tsub(t2, t1); 1396 print_report("wrote", &t2, first_offset, total, total, cnt, Cflag); 1397 out: 1398 for (i = 0; i < nr_reqs; i++) { 1399 qemu_io_free(buf[i]); 1400 if (reqs[i].qiov != NULL) { 1401 qemu_iovec_destroy(&qiovs[i]); 1402 } 1403 } 1404 g_free(buf); 1405 g_free(reqs); 1406 g_free(qiovs); 1407 return 0; 1408 } 1409 1410 struct aio_ctx { 1411 BlockBackend *blk; 1412 QEMUIOVector qiov; 1413 int64_t offset; 1414 char *buf; 1415 int qflag; 1416 int vflag; 1417 int Cflag; 1418 int Pflag; 1419 BlockAcctCookie acct; 1420 int pattern; 1421 struct timeval t1; 1422 }; 1423 1424 static void aio_write_done(void *opaque, int ret) 1425 { 1426 struct aio_ctx *ctx = opaque; 1427 struct timeval t2; 1428 1429 gettimeofday(&t2, NULL); 1430 1431 1432 if (ret < 0) { 1433 printf("aio_write failed: %s\n", strerror(-ret)); 1434 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); 1435 goto out; 1436 } 1437 1438 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); 1439 1440 if (ctx->qflag) { 1441 goto out; 1442 } 1443 1444 /* Finally, report back -- -C gives a parsable format */ 1445 t2 = tsub(t2, ctx->t1); 1446 print_report("wrote", &t2, ctx->offset, ctx->qiov.size, 1447 ctx->qiov.size, 1, ctx->Cflag); 1448 out: 1449 qemu_io_free(ctx->buf); 1450 qemu_iovec_destroy(&ctx->qiov); 1451 g_free(ctx); 1452 } 1453 1454 static void aio_read_done(void *opaque, int ret) 1455 { 1456 struct aio_ctx *ctx = opaque; 1457 struct timeval t2; 1458 1459 gettimeofday(&t2, NULL); 1460 1461 if (ret < 0) { 1462 printf("readv failed: %s\n", strerror(-ret)); 1463 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); 1464 goto out; 1465 } 1466 1467 if (ctx->Pflag) { 1468 void *cmp_buf = g_malloc(ctx->qiov.size); 1469 1470 memset(cmp_buf, ctx->pattern, ctx->qiov.size); 1471 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) { 1472 printf("Pattern verification failed at offset %" 1473 PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size); 1474 } 1475 g_free(cmp_buf); 1476 } 1477 1478 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); 1479 1480 if (ctx->qflag) { 1481 goto out; 1482 } 1483 1484 if (ctx->vflag) { 1485 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size); 1486 } 1487 1488 /* Finally, report back -- -C gives a parsable format */ 1489 t2 = tsub(t2, ctx->t1); 1490 print_report("read", &t2, ctx->offset, ctx->qiov.size, 1491 ctx->qiov.size, 1, ctx->Cflag); 1492 out: 1493 qemu_io_free(ctx->buf); 1494 qemu_iovec_destroy(&ctx->qiov); 1495 g_free(ctx); 1496 } 1497 1498 static void aio_read_help(void) 1499 { 1500 printf( 1501 "\n" 1502 " asynchronously reads a range of bytes from the given offset\n" 1503 "\n" 1504 " Example:\n" 1505 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" 1506 "\n" 1507 " Reads a segment of the currently open file, optionally dumping it to the\n" 1508 " standard output stream (with -v option) for subsequent inspection.\n" 1509 " The read is performed asynchronously and the aio_flush command must be\n" 1510 " used to ensure all outstanding aio requests have been completed.\n" 1511 " -C, -- report statistics in a machine parsable format\n" 1512 " -P, -- use a pattern to verify read data\n" 1513 " -v, -- dump buffer to standard output\n" 1514 " -q, -- quiet mode, do not show I/O statistics\n" 1515 "\n"); 1516 } 1517 1518 static int aio_read_f(BlockBackend *blk, int argc, char **argv); 1519 1520 static const cmdinfo_t aio_read_cmd = { 1521 .name = "aio_read", 1522 .cfunc = aio_read_f, 1523 .argmin = 2, 1524 .argmax = -1, 1525 .args = "[-Cqv] [-P pattern ] off len [len..]", 1526 .oneline = "asynchronously reads a number of bytes", 1527 .help = aio_read_help, 1528 }; 1529 1530 static int aio_read_f(BlockBackend *blk, int argc, char **argv) 1531 { 1532 int nr_iov, c; 1533 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); 1534 1535 ctx->blk = blk; 1536 while ((c = getopt(argc, argv, "CP:qv")) != -1) { 1537 switch (c) { 1538 case 'C': 1539 ctx->Cflag = 1; 1540 break; 1541 case 'P': 1542 ctx->Pflag = 1; 1543 ctx->pattern = parse_pattern(optarg); 1544 if (ctx->pattern < 0) { 1545 g_free(ctx); 1546 return 0; 1547 } 1548 break; 1549 case 'q': 1550 ctx->qflag = 1; 1551 break; 1552 case 'v': 1553 ctx->vflag = 1; 1554 break; 1555 default: 1556 g_free(ctx); 1557 return qemuio_command_usage(&aio_read_cmd); 1558 } 1559 } 1560 1561 if (optind > argc - 2) { 1562 g_free(ctx); 1563 return qemuio_command_usage(&aio_read_cmd); 1564 } 1565 1566 ctx->offset = cvtnum(argv[optind]); 1567 if (ctx->offset < 0) { 1568 print_cvtnum_err(ctx->offset, argv[optind]); 1569 g_free(ctx); 1570 return 0; 1571 } 1572 optind++; 1573 1574 if (ctx->offset & 0x1ff) { 1575 printf("offset %" PRId64 " is not sector aligned\n", 1576 ctx->offset); 1577 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); 1578 g_free(ctx); 1579 return 0; 1580 } 1581 1582 nr_iov = argc - optind; 1583 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab); 1584 if (ctx->buf == NULL) { 1585 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); 1586 g_free(ctx); 1587 return 0; 1588 } 1589 1590 gettimeofday(&ctx->t1, NULL); 1591 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, 1592 BLOCK_ACCT_READ); 1593 blk_aio_readv(blk, ctx->offset >> 9, &ctx->qiov, 1594 ctx->qiov.size >> 9, aio_read_done, ctx); 1595 return 0; 1596 } 1597 1598 static void aio_write_help(void) 1599 { 1600 printf( 1601 "\n" 1602 " asynchronously writes a range of bytes from the given offset source\n" 1603 " from multiple buffers\n" 1604 "\n" 1605 " Example:\n" 1606 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" 1607 "\n" 1608 " Writes into a segment of the currently open file, using a buffer\n" 1609 " filled with a set pattern (0xcdcdcdcd).\n" 1610 " The write is performed asynchronously and the aio_flush command must be\n" 1611 " used to ensure all outstanding aio requests have been completed.\n" 1612 " -P, -- use different pattern to fill file\n" 1613 " -C, -- report statistics in a machine parsable format\n" 1614 " -q, -- quiet mode, do not show I/O statistics\n" 1615 "\n"); 1616 } 1617 1618 static int aio_write_f(BlockBackend *blk, int argc, char **argv); 1619 1620 static const cmdinfo_t aio_write_cmd = { 1621 .name = "aio_write", 1622 .cfunc = aio_write_f, 1623 .argmin = 2, 1624 .argmax = -1, 1625 .args = "[-Cq] [-P pattern ] off len [len..]", 1626 .oneline = "asynchronously writes a number of bytes", 1627 .help = aio_write_help, 1628 }; 1629 1630 static int aio_write_f(BlockBackend *blk, int argc, char **argv) 1631 { 1632 int nr_iov, c; 1633 int pattern = 0xcd; 1634 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); 1635 1636 ctx->blk = blk; 1637 while ((c = getopt(argc, argv, "CqP:")) != -1) { 1638 switch (c) { 1639 case 'C': 1640 ctx->Cflag = 1; 1641 break; 1642 case 'q': 1643 ctx->qflag = 1; 1644 break; 1645 case 'P': 1646 pattern = parse_pattern(optarg); 1647 if (pattern < 0) { 1648 g_free(ctx); 1649 return 0; 1650 } 1651 break; 1652 default: 1653 g_free(ctx); 1654 return qemuio_command_usage(&aio_write_cmd); 1655 } 1656 } 1657 1658 if (optind > argc - 2) { 1659 g_free(ctx); 1660 return qemuio_command_usage(&aio_write_cmd); 1661 } 1662 1663 ctx->offset = cvtnum(argv[optind]); 1664 if (ctx->offset < 0) { 1665 print_cvtnum_err(ctx->offset, argv[optind]); 1666 g_free(ctx); 1667 return 0; 1668 } 1669 optind++; 1670 1671 if (ctx->offset & 0x1ff) { 1672 printf("offset %" PRId64 " is not sector aligned\n", 1673 ctx->offset); 1674 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); 1675 g_free(ctx); 1676 return 0; 1677 } 1678 1679 nr_iov = argc - optind; 1680 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, pattern); 1681 if (ctx->buf == NULL) { 1682 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); 1683 g_free(ctx); 1684 return 0; 1685 } 1686 1687 gettimeofday(&ctx->t1, NULL); 1688 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, 1689 BLOCK_ACCT_WRITE); 1690 blk_aio_writev(blk, ctx->offset >> 9, &ctx->qiov, 1691 ctx->qiov.size >> 9, aio_write_done, ctx); 1692 return 0; 1693 } 1694 1695 static int aio_flush_f(BlockBackend *blk, int argc, char **argv) 1696 { 1697 BlockAcctCookie cookie; 1698 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH); 1699 blk_drain_all(); 1700 block_acct_done(blk_get_stats(blk), &cookie); 1701 return 0; 1702 } 1703 1704 static const cmdinfo_t aio_flush_cmd = { 1705 .name = "aio_flush", 1706 .cfunc = aio_flush_f, 1707 .oneline = "completes all outstanding aio requests" 1708 }; 1709 1710 static int flush_f(BlockBackend *blk, int argc, char **argv) 1711 { 1712 blk_flush(blk); 1713 return 0; 1714 } 1715 1716 static const cmdinfo_t flush_cmd = { 1717 .name = "flush", 1718 .altname = "f", 1719 .cfunc = flush_f, 1720 .oneline = "flush all in-core file state to disk", 1721 }; 1722 1723 static int truncate_f(BlockBackend *blk, int argc, char **argv) 1724 { 1725 int64_t offset; 1726 int ret; 1727 1728 offset = cvtnum(argv[1]); 1729 if (offset < 0) { 1730 print_cvtnum_err(offset, argv[1]); 1731 return 0; 1732 } 1733 1734 ret = blk_truncate(blk, offset); 1735 if (ret < 0) { 1736 printf("truncate: %s\n", strerror(-ret)); 1737 return 0; 1738 } 1739 1740 return 0; 1741 } 1742 1743 static const cmdinfo_t truncate_cmd = { 1744 .name = "truncate", 1745 .altname = "t", 1746 .cfunc = truncate_f, 1747 .argmin = 1, 1748 .argmax = 1, 1749 .args = "off", 1750 .oneline = "truncates the current file at the given offset", 1751 }; 1752 1753 static int length_f(BlockBackend *blk, int argc, char **argv) 1754 { 1755 int64_t size; 1756 char s1[64]; 1757 1758 size = blk_getlength(blk); 1759 if (size < 0) { 1760 printf("getlength: %s\n", strerror(-size)); 1761 return 0; 1762 } 1763 1764 cvtstr(size, s1, sizeof(s1)); 1765 printf("%s\n", s1); 1766 return 0; 1767 } 1768 1769 1770 static const cmdinfo_t length_cmd = { 1771 .name = "length", 1772 .altname = "l", 1773 .cfunc = length_f, 1774 .oneline = "gets the length of the current file", 1775 }; 1776 1777 1778 static int info_f(BlockBackend *blk, int argc, char **argv) 1779 { 1780 BlockDriverState *bs = blk_bs(blk); 1781 BlockDriverInfo bdi; 1782 ImageInfoSpecific *spec_info; 1783 char s1[64], s2[64]; 1784 int ret; 1785 1786 if (bs->drv && bs->drv->format_name) { 1787 printf("format name: %s\n", bs->drv->format_name); 1788 } 1789 if (bs->drv && bs->drv->protocol_name) { 1790 printf("format name: %s\n", bs->drv->protocol_name); 1791 } 1792 1793 ret = bdrv_get_info(bs, &bdi); 1794 if (ret) { 1795 return 0; 1796 } 1797 1798 cvtstr(bdi.cluster_size, s1, sizeof(s1)); 1799 cvtstr(bdi.vm_state_offset, s2, sizeof(s2)); 1800 1801 printf("cluster size: %s\n", s1); 1802 printf("vm state offset: %s\n", s2); 1803 1804 spec_info = bdrv_get_specific_info(bs); 1805 if (spec_info) { 1806 printf("Format specific information:\n"); 1807 bdrv_image_info_specific_dump(fprintf, stdout, spec_info); 1808 qapi_free_ImageInfoSpecific(spec_info); 1809 } 1810 1811 return 0; 1812 } 1813 1814 1815 1816 static const cmdinfo_t info_cmd = { 1817 .name = "info", 1818 .altname = "i", 1819 .cfunc = info_f, 1820 .oneline = "prints information about the current file", 1821 }; 1822 1823 static void discard_help(void) 1824 { 1825 printf( 1826 "\n" 1827 " discards a range of bytes from the given offset\n" 1828 "\n" 1829 " Example:\n" 1830 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n" 1831 "\n" 1832 " Discards a segment of the currently open file.\n" 1833 " -C, -- report statistics in a machine parsable format\n" 1834 " -q, -- quiet mode, do not show I/O statistics\n" 1835 "\n"); 1836 } 1837 1838 static int discard_f(BlockBackend *blk, int argc, char **argv); 1839 1840 static const cmdinfo_t discard_cmd = { 1841 .name = "discard", 1842 .altname = "d", 1843 .cfunc = discard_f, 1844 .argmin = 2, 1845 .argmax = -1, 1846 .args = "[-Cq] off len", 1847 .oneline = "discards a number of bytes at a specified offset", 1848 .help = discard_help, 1849 }; 1850 1851 static int discard_f(BlockBackend *blk, int argc, char **argv) 1852 { 1853 struct timeval t1, t2; 1854 int Cflag = 0, qflag = 0; 1855 int c, ret; 1856 int64_t offset, count; 1857 1858 while ((c = getopt(argc, argv, "Cq")) != -1) { 1859 switch (c) { 1860 case 'C': 1861 Cflag = 1; 1862 break; 1863 case 'q': 1864 qflag = 1; 1865 break; 1866 default: 1867 return qemuio_command_usage(&discard_cmd); 1868 } 1869 } 1870 1871 if (optind != argc - 2) { 1872 return qemuio_command_usage(&discard_cmd); 1873 } 1874 1875 offset = cvtnum(argv[optind]); 1876 if (offset < 0) { 1877 print_cvtnum_err(offset, argv[optind]); 1878 return 0; 1879 } 1880 1881 optind++; 1882 count = cvtnum(argv[optind]); 1883 if (count < 0) { 1884 print_cvtnum_err(count, argv[optind]); 1885 return 0; 1886 } else if (count >> BDRV_SECTOR_BITS > INT_MAX) { 1887 printf("length cannot exceed %"PRIu64", given %s\n", 1888 (uint64_t)INT_MAX << BDRV_SECTOR_BITS, 1889 argv[optind]); 1890 return 0; 1891 } 1892 1893 gettimeofday(&t1, NULL); 1894 ret = blk_discard(blk, offset >> BDRV_SECTOR_BITS, 1895 count >> BDRV_SECTOR_BITS); 1896 gettimeofday(&t2, NULL); 1897 1898 if (ret < 0) { 1899 printf("discard failed: %s\n", strerror(-ret)); 1900 goto out; 1901 } 1902 1903 /* Finally, report back -- -C gives a parsable format */ 1904 if (!qflag) { 1905 t2 = tsub(t2, t1); 1906 print_report("discard", &t2, offset, count, count, 1, Cflag); 1907 } 1908 1909 out: 1910 return 0; 1911 } 1912 1913 static int alloc_f(BlockBackend *blk, int argc, char **argv) 1914 { 1915 BlockDriverState *bs = blk_bs(blk); 1916 int64_t offset, sector_num, nb_sectors, remaining; 1917 char s1[64]; 1918 int num, ret; 1919 int64_t sum_alloc; 1920 1921 offset = cvtnum(argv[1]); 1922 if (offset < 0) { 1923 print_cvtnum_err(offset, argv[1]); 1924 return 0; 1925 } else if (offset & 0x1ff) { 1926 printf("offset %" PRId64 " is not sector aligned\n", 1927 offset); 1928 return 0; 1929 } 1930 1931 if (argc == 3) { 1932 nb_sectors = cvtnum(argv[2]); 1933 if (nb_sectors < 0) { 1934 print_cvtnum_err(nb_sectors, argv[2]); 1935 return 0; 1936 } else if (nb_sectors > INT_MAX) { 1937 printf("length argument cannot exceed %d, given %s\n", 1938 INT_MAX, argv[2]); 1939 return 0; 1940 } 1941 } else { 1942 nb_sectors = 1; 1943 } 1944 1945 remaining = nb_sectors; 1946 sum_alloc = 0; 1947 sector_num = offset >> 9; 1948 while (remaining) { 1949 ret = bdrv_is_allocated(bs, sector_num, remaining, &num); 1950 if (ret < 0) { 1951 printf("is_allocated failed: %s\n", strerror(-ret)); 1952 return 0; 1953 } 1954 sector_num += num; 1955 remaining -= num; 1956 if (ret) { 1957 sum_alloc += num; 1958 } 1959 if (num == 0) { 1960 nb_sectors -= remaining; 1961 remaining = 0; 1962 } 1963 } 1964 1965 cvtstr(offset, s1, sizeof(s1)); 1966 1967 printf("%"PRId64"/%"PRId64" sectors allocated at offset %s\n", 1968 sum_alloc, nb_sectors, s1); 1969 return 0; 1970 } 1971 1972 static const cmdinfo_t alloc_cmd = { 1973 .name = "alloc", 1974 .altname = "a", 1975 .argmin = 1, 1976 .argmax = 2, 1977 .cfunc = alloc_f, 1978 .args = "off [sectors]", 1979 .oneline = "checks if a sector is present in the file", 1980 }; 1981 1982 1983 static int map_is_allocated(BlockDriverState *bs, int64_t sector_num, 1984 int64_t nb_sectors, int64_t *pnum) 1985 { 1986 int num, num_checked; 1987 int ret, firstret; 1988 1989 num_checked = MIN(nb_sectors, INT_MAX); 1990 ret = bdrv_is_allocated(bs, sector_num, num_checked, &num); 1991 if (ret < 0) { 1992 return ret; 1993 } 1994 1995 firstret = ret; 1996 *pnum = num; 1997 1998 while (nb_sectors > 0 && ret == firstret) { 1999 sector_num += num; 2000 nb_sectors -= num; 2001 2002 num_checked = MIN(nb_sectors, INT_MAX); 2003 ret = bdrv_is_allocated(bs, sector_num, num_checked, &num); 2004 if (ret == firstret && num) { 2005 *pnum += num; 2006 } else { 2007 break; 2008 } 2009 } 2010 2011 return firstret; 2012 } 2013 2014 static int map_f(BlockBackend *blk, int argc, char **argv) 2015 { 2016 int64_t offset; 2017 int64_t nb_sectors, total_sectors; 2018 char s1[64]; 2019 int64_t num; 2020 int ret; 2021 const char *retstr; 2022 2023 offset = 0; 2024 total_sectors = blk_nb_sectors(blk); 2025 if (total_sectors < 0) { 2026 error_report("Failed to query image length: %s", 2027 strerror(-total_sectors)); 2028 return 0; 2029 } 2030 2031 nb_sectors = total_sectors; 2032 2033 do { 2034 ret = map_is_allocated(blk_bs(blk), offset, nb_sectors, &num); 2035 if (ret < 0) { 2036 error_report("Failed to get allocation status: %s", strerror(-ret)); 2037 return 0; 2038 } else if (!num) { 2039 error_report("Unexpected end of image"); 2040 return 0; 2041 } 2042 2043 retstr = ret ? " allocated" : "not allocated"; 2044 cvtstr(offset << 9ULL, s1, sizeof(s1)); 2045 printf("[% 24" PRId64 "] % 8" PRId64 "/% 8" PRId64 " sectors %s " 2046 "at offset %s (%d)\n", 2047 offset << 9ULL, num, nb_sectors, retstr, s1, ret); 2048 2049 offset += num; 2050 nb_sectors -= num; 2051 } while (offset < total_sectors); 2052 2053 return 0; 2054 } 2055 2056 static const cmdinfo_t map_cmd = { 2057 .name = "map", 2058 .argmin = 0, 2059 .argmax = 0, 2060 .cfunc = map_f, 2061 .args = "", 2062 .oneline = "prints the allocated areas of a file", 2063 }; 2064 2065 static void reopen_help(void) 2066 { 2067 printf( 2068 "\n" 2069 " Changes the open options of an already opened image\n" 2070 "\n" 2071 " Example:\n" 2072 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n" 2073 "\n" 2074 " -r, -- Reopen the image read-only\n" 2075 " -c, -- Change the cache mode to the given value\n" 2076 " -o, -- Changes block driver options (cf. 'open' command)\n" 2077 "\n"); 2078 } 2079 2080 static int reopen_f(BlockBackend *blk, int argc, char **argv); 2081 2082 static QemuOptsList reopen_opts = { 2083 .name = "reopen", 2084 .merge_lists = true, 2085 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head), 2086 .desc = { 2087 /* no elements => accept any params */ 2088 { /* end of list */ } 2089 }, 2090 }; 2091 2092 static const cmdinfo_t reopen_cmd = { 2093 .name = "reopen", 2094 .argmin = 0, 2095 .argmax = -1, 2096 .cfunc = reopen_f, 2097 .args = "[-r] [-c cache] [-o options]", 2098 .oneline = "reopens an image with new options", 2099 .help = reopen_help, 2100 }; 2101 2102 static int reopen_f(BlockBackend *blk, int argc, char **argv) 2103 { 2104 BlockDriverState *bs = blk_bs(blk); 2105 QemuOpts *qopts; 2106 QDict *opts; 2107 int c; 2108 int flags = bs->open_flags; 2109 bool writethrough = !blk_enable_write_cache(blk); 2110 2111 BlockReopenQueue *brq; 2112 Error *local_err = NULL; 2113 2114 while ((c = getopt(argc, argv, "c:o:r")) != -1) { 2115 switch (c) { 2116 case 'c': 2117 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) { 2118 error_report("Invalid cache option: %s", optarg); 2119 return 0; 2120 } 2121 break; 2122 case 'o': 2123 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) { 2124 qemu_opts_reset(&reopen_opts); 2125 return 0; 2126 } 2127 break; 2128 case 'r': 2129 flags &= ~BDRV_O_RDWR; 2130 break; 2131 default: 2132 qemu_opts_reset(&reopen_opts); 2133 return qemuio_command_usage(&reopen_cmd); 2134 } 2135 } 2136 2137 if (optind != argc) { 2138 qemu_opts_reset(&reopen_opts); 2139 return qemuio_command_usage(&reopen_cmd); 2140 } 2141 2142 if (writethrough != blk_enable_write_cache(blk) && 2143 blk_get_attached_dev(blk)) 2144 { 2145 error_report("Cannot change cache.writeback: Device attached"); 2146 qemu_opts_reset(&reopen_opts); 2147 return 0; 2148 } 2149 2150 qopts = qemu_opts_find(&reopen_opts, NULL); 2151 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL; 2152 qemu_opts_reset(&reopen_opts); 2153 2154 brq = bdrv_reopen_queue(NULL, bs, opts, flags); 2155 bdrv_reopen_multiple(brq, &local_err); 2156 if (local_err) { 2157 error_report_err(local_err); 2158 } else { 2159 blk_set_enable_write_cache(blk, !writethrough); 2160 } 2161 2162 return 0; 2163 } 2164 2165 static int break_f(BlockBackend *blk, int argc, char **argv) 2166 { 2167 int ret; 2168 2169 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]); 2170 if (ret < 0) { 2171 printf("Could not set breakpoint: %s\n", strerror(-ret)); 2172 } 2173 2174 return 0; 2175 } 2176 2177 static int remove_break_f(BlockBackend *blk, int argc, char **argv) 2178 { 2179 int ret; 2180 2181 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]); 2182 if (ret < 0) { 2183 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret)); 2184 } 2185 2186 return 0; 2187 } 2188 2189 static const cmdinfo_t break_cmd = { 2190 .name = "break", 2191 .argmin = 2, 2192 .argmax = 2, 2193 .cfunc = break_f, 2194 .args = "event tag", 2195 .oneline = "sets a breakpoint on event and tags the stopped " 2196 "request as tag", 2197 }; 2198 2199 static const cmdinfo_t remove_break_cmd = { 2200 .name = "remove_break", 2201 .argmin = 1, 2202 .argmax = 1, 2203 .cfunc = remove_break_f, 2204 .args = "tag", 2205 .oneline = "remove a breakpoint by tag", 2206 }; 2207 2208 static int resume_f(BlockBackend *blk, int argc, char **argv) 2209 { 2210 int ret; 2211 2212 ret = bdrv_debug_resume(blk_bs(blk), argv[1]); 2213 if (ret < 0) { 2214 printf("Could not resume request: %s\n", strerror(-ret)); 2215 } 2216 2217 return 0; 2218 } 2219 2220 static const cmdinfo_t resume_cmd = { 2221 .name = "resume", 2222 .argmin = 1, 2223 .argmax = 1, 2224 .cfunc = resume_f, 2225 .args = "tag", 2226 .oneline = "resumes the request tagged as tag", 2227 }; 2228 2229 static int wait_break_f(BlockBackend *blk, int argc, char **argv) 2230 { 2231 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) { 2232 aio_poll(blk_get_aio_context(blk), true); 2233 } 2234 2235 return 0; 2236 } 2237 2238 static const cmdinfo_t wait_break_cmd = { 2239 .name = "wait_break", 2240 .argmin = 1, 2241 .argmax = 1, 2242 .cfunc = wait_break_f, 2243 .args = "tag", 2244 .oneline = "waits for the suspension of a request", 2245 }; 2246 2247 static int abort_f(BlockBackend *blk, int argc, char **argv) 2248 { 2249 abort(); 2250 } 2251 2252 static const cmdinfo_t abort_cmd = { 2253 .name = "abort", 2254 .cfunc = abort_f, 2255 .flags = CMD_NOFILE_OK, 2256 .oneline = "simulate a program crash using abort(3)", 2257 }; 2258 2259 static void sigraise_help(void) 2260 { 2261 printf( 2262 "\n" 2263 " raises the given signal\n" 2264 "\n" 2265 " Example:\n" 2266 " 'sigraise %i' - raises SIGTERM\n" 2267 "\n" 2268 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n" 2269 " given to sigraise.\n" 2270 "\n", SIGTERM); 2271 } 2272 2273 static int sigraise_f(BlockBackend *blk, int argc, char **argv); 2274 2275 static const cmdinfo_t sigraise_cmd = { 2276 .name = "sigraise", 2277 .cfunc = sigraise_f, 2278 .argmin = 1, 2279 .argmax = 1, 2280 .flags = CMD_NOFILE_OK, 2281 .args = "signal", 2282 .oneline = "raises a signal", 2283 .help = sigraise_help, 2284 }; 2285 2286 static int sigraise_f(BlockBackend *blk, int argc, char **argv) 2287 { 2288 int64_t sig = cvtnum(argv[1]); 2289 if (sig < 0) { 2290 print_cvtnum_err(sig, argv[1]); 2291 return 0; 2292 } else if (sig > NSIG) { 2293 printf("signal argument '%s' is too large to be a valid signal\n", 2294 argv[1]); 2295 return 0; 2296 } 2297 2298 /* Using raise() to kill this process does not necessarily flush all open 2299 * streams. At least stdout and stderr (although the latter should be 2300 * non-buffered anyway) should be flushed, though. */ 2301 fflush(stdout); 2302 fflush(stderr); 2303 2304 raise(sig); 2305 return 0; 2306 } 2307 2308 static void sleep_cb(void *opaque) 2309 { 2310 bool *expired = opaque; 2311 *expired = true; 2312 } 2313 2314 static int sleep_f(BlockBackend *blk, int argc, char **argv) 2315 { 2316 char *endptr; 2317 long ms; 2318 struct QEMUTimer *timer; 2319 bool expired = false; 2320 2321 ms = strtol(argv[1], &endptr, 0); 2322 if (ms < 0 || *endptr != '\0') { 2323 printf("%s is not a valid number\n", argv[1]); 2324 return 0; 2325 } 2326 2327 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired); 2328 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms); 2329 2330 while (!expired) { 2331 main_loop_wait(false); 2332 } 2333 2334 timer_free(timer); 2335 2336 return 0; 2337 } 2338 2339 static const cmdinfo_t sleep_cmd = { 2340 .name = "sleep", 2341 .argmin = 1, 2342 .argmax = 1, 2343 .cfunc = sleep_f, 2344 .flags = CMD_NOFILE_OK, 2345 .oneline = "waits for the given value in milliseconds", 2346 }; 2347 2348 static void help_oneline(const char *cmd, const cmdinfo_t *ct) 2349 { 2350 if (cmd) { 2351 printf("%s ", cmd); 2352 } else { 2353 printf("%s ", ct->name); 2354 if (ct->altname) { 2355 printf("(or %s) ", ct->altname); 2356 } 2357 } 2358 2359 if (ct->args) { 2360 printf("%s ", ct->args); 2361 } 2362 printf("-- %s\n", ct->oneline); 2363 } 2364 2365 static void help_onecmd(const char *cmd, const cmdinfo_t *ct) 2366 { 2367 help_oneline(cmd, ct); 2368 if (ct->help) { 2369 ct->help(); 2370 } 2371 } 2372 2373 static void help_all(void) 2374 { 2375 const cmdinfo_t *ct; 2376 2377 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { 2378 help_oneline(ct->name, ct); 2379 } 2380 printf("\nUse 'help commandname' for extended help.\n"); 2381 } 2382 2383 static int help_f(BlockBackend *blk, int argc, char **argv) 2384 { 2385 const cmdinfo_t *ct; 2386 2387 if (argc == 1) { 2388 help_all(); 2389 return 0; 2390 } 2391 2392 ct = find_command(argv[1]); 2393 if (ct == NULL) { 2394 printf("command %s not found\n", argv[1]); 2395 return 0; 2396 } 2397 2398 help_onecmd(argv[1], ct); 2399 return 0; 2400 } 2401 2402 static const cmdinfo_t help_cmd = { 2403 .name = "help", 2404 .altname = "?", 2405 .cfunc = help_f, 2406 .argmin = 0, 2407 .argmax = 1, 2408 .flags = CMD_FLAG_GLOBAL, 2409 .args = "[command]", 2410 .oneline = "help for one or all commands", 2411 }; 2412 2413 bool qemuio_command(BlockBackend *blk, const char *cmd) 2414 { 2415 char *input; 2416 const cmdinfo_t *ct; 2417 char **v; 2418 int c; 2419 bool done = false; 2420 2421 input = g_strdup(cmd); 2422 v = breakline(input, &c); 2423 if (c) { 2424 ct = find_command(v[0]); 2425 if (ct) { 2426 done = command(blk, ct, c, v); 2427 } else { 2428 fprintf(stderr, "command \"%s\" not found\n", v[0]); 2429 } 2430 } 2431 g_free(input); 2432 g_free(v); 2433 2434 return done; 2435 } 2436 2437 static void __attribute((constructor)) init_qemuio_commands(void) 2438 { 2439 /* initialize commands */ 2440 qemuio_add_command(&help_cmd); 2441 qemuio_add_command(&read_cmd); 2442 qemuio_add_command(&readv_cmd); 2443 qemuio_add_command(&write_cmd); 2444 qemuio_add_command(&writev_cmd); 2445 qemuio_add_command(&multiwrite_cmd); 2446 qemuio_add_command(&aio_read_cmd); 2447 qemuio_add_command(&aio_write_cmd); 2448 qemuio_add_command(&aio_flush_cmd); 2449 qemuio_add_command(&flush_cmd); 2450 qemuio_add_command(&truncate_cmd); 2451 qemuio_add_command(&length_cmd); 2452 qemuio_add_command(&info_cmd); 2453 qemuio_add_command(&discard_cmd); 2454 qemuio_add_command(&alloc_cmd); 2455 qemuio_add_command(&map_cmd); 2456 qemuio_add_command(&reopen_cmd); 2457 qemuio_add_command(&break_cmd); 2458 qemuio_add_command(&remove_break_cmd); 2459 qemuio_add_command(&resume_cmd); 2460 qemuio_add_command(&wait_break_cmd); 2461 qemuio_add_command(&abort_cmd); 2462 qemuio_add_command(&sleep_cmd); 2463 qemuio_add_command(&sigraise_cmd); 2464 } 2465