qemu-io.c

   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 #include <sys/types.h>
  11 #include <stdarg.h>
  12 #include <stdio.h>
  13 #include <getopt.h>
  14
  15 #include "qemu-common.h"
  16 #include "block_int.h"
  17 #include "cmd.h"
  18
  19 #define VERSION "0.0.1"
  20
  21 #define CMD_NOFILE_OK   0x01
  22
  23 char *progname;
  24 static BlockDriverState *bs;
  25
  26 static int misalign;
  27
  28 /*
  29  * Memory allocation helpers.
  30  *
  31  * Make sure memory is aligned by default, or purposefully misaligned if
  32  * that is specified on the command line.
  33  */
  34
  35 #define MISALIGN_OFFSET         16
  36 static void *qemu_io_alloc(size_t len, int pattern)
  37 {
  38         void *buf;
  39
  40         if (misalign)
  41                 len += MISALIGN_OFFSET;
  42         buf = qemu_memalign(512, len);
  43         memset(buf, pattern, len);
  44         if (misalign)
  45                 buf += MISALIGN_OFFSET;
  46         return buf;
  47 }
  48
  49 static void qemu_io_free(void *p)
  50 {
  51         if (misalign)
  52                 p -= MISALIGN_OFFSET;
  53         qemu_vfree(p);
  54 }
  55
  56 static void
  57 dump_buffer(char *buffer, int64_t offset, int len)
  58 {
  59         int i, j;
  60         char *p;
  61
  62         for (i = 0, p = buffer; i < len; i += 16) {
  63                 char    *s = p;
  64
  65                 printf("%08llx:  ", (unsigned long long)offset + i);
  66                 for (j = 0; j < 16 && i + j < len; j++, p++)
  67                         printf("%02x ", *p);
  68                 printf(" ");
  69                 for (j = 0; j < 16 && i + j < len; j++, s++) {
  70                         if (isalnum((int)*s))
  71                                 printf("%c", *s);
  72                         else
  73                                 printf(".");
  74                 }
  75                 printf("\n");
  76         }
  77 }
  78
  79 static void
  80 print_report(const char *op, struct timeval *t, int64_t offset,
  81                 int count, int total, int cnt, int Cflag)
  82 {
  83         char s1[64], s2[64], ts[64];
  84
  85         timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
  86         if (!Cflag) {
  87                 cvtstr((double)total, s1, sizeof(s1));
  88                 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
  89                 printf("%s %d/%d bytes at offset %lld\n",
  90                         op, total, count, (long long)offset);
  91                 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
  92                         s1, cnt, ts, s2, tdiv((double)cnt, *t));
  93         } else {/* bytes,ops,time,bytes/sec,ops/sec */
  94                 printf("%d,%d,%s,%.3f,%.3f\n",
  95                         total, cnt, ts,
  96                         tdiv((double)total, *t),
  97                         tdiv((double)cnt, *t));
  98         }
  99 }
 100
 101 static int do_read(char *buf, int64_t offset, int count, int *total)
 102 {
 103         int ret;
 104
 105         ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 106         if (ret < 0)
 107                 return ret;
 108         *total = count;
 109         return 1;
 110 }
 111
 112 static int do_write(char *buf, int64_t offset, int count, int *total)
 113 {
 114         int ret;
 115
 116         ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 117         if (ret < 0)
 118                 return ret;
 119         *total = count;
 120         return 1;
 121 }
 122
 123 static int do_pread(char *buf, int64_t offset, int count, int *total)
 124 {
 125         *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
 126         if (*total < 0)
 127                 return *total;
 128         return 1;
 129 }
 130
 131 static int do_pwrite(char *buf, int64_t offset, int count, int *total)
 132 {
 133         *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
 134         if (*total < 0)
 135                 return *total;
 136         return 1;
 137 }
 138
 139 #define NOT_DONE 0x7fffffff
 140 static void aio_rw_done(void *opaque, int ret)
 141 {
 142         *(int *)opaque = ret;
 143 }
 144
 145 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
 146 {
 147         BlockDriverAIOCB *acb;
 148         int async_ret = NOT_DONE;
 149
 150         acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
 151                              aio_rw_done, &async_ret);
 152         if (!acb)
 153                 return -EIO;
 154
 155         while (async_ret == NOT_DONE)
 156                 qemu_aio_wait();
 157
 158         *total = qiov->size;
 159         return async_ret < 0 ? async_ret : 1;
 160 }
 161
 162 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
 163 {
 164         BlockDriverAIOCB *acb;
 165         int async_ret = NOT_DONE;
 166
 167         acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
 168                               aio_rw_done, &async_ret);
 169         if (!acb)
 170                 return -EIO;
 171
 172         while (async_ret == NOT_DONE)
 173                 qemu_aio_wait();
 174
 175         *total = qiov->size >> 9;
 176         return async_ret < 0 ? async_ret : 1;
 177 }
 178
 179
 180 static const cmdinfo_t read_cmd;
 181
 182 static void
 183 read_help(void)
 184 {
 185         printf(
 186 "\n"
 187 " reads a range of bytes from the given offset\n"
 188 "\n"
 189 " Example:\n"
 190 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
 191 "\n"
 192 " Reads a segment of the currently open file, optionally dumping it to the\n"
 193 " standard output stream (with -v option) for subsequent inspection.\n"
 194 " -p, -- use bdrv_pread to read the file\n"
 195 " -C, -- report statistics in a machine parsable format\n"
 196 " -v, -- dump buffer to standard output\n"
 197 " -q, -- quite mode, do not show I/O statistics\n"
 198 "\n");
 199 }
 200
 201 static int
 202 read_f(int argc, char **argv)
 203 {
 204         struct timeval t1, t2;
 205         int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 206         int c, cnt;
 207         char *buf;
 208         int64_t offset;
 209         int count, total;
 210
 211         while ((c = getopt(argc, argv, "Cpqv")) != EOF) {
 212                 switch (c) {
 213                 case 'C':
 214                         Cflag = 1;
 215                         break;
 216                 case 'p':
 217                         pflag = 1;
 218                         break;
 219                 case 'q':
 220                         qflag = 1;
 221                         break;
 222                 case 'v':
 223                         vflag = 1;
 224                         break;
 225                 default:
 226                         return command_usage(&read_cmd);
 227                 }
 228         }
 229
 230         if (optind != argc - 2)
 231                 return command_usage(&read_cmd);
 232
 233         offset = cvtnum(argv[optind]);
 234         if (offset < 0) {
 235                 printf("non-numeric length argument -- %s\n", argv[optind]);
 236                 return 0;
 237         }
 238
 239         optind++;
 240         count = cvtnum(argv[optind]);
 241         if (count < 0) {
 242                 printf("non-numeric length argument -- %s\n", argv[optind]);
 243                 return 0;
 244         }
 245
 246         if (!pflag)
 247                 if (offset & 0x1ff) {
 248                         printf("offset %lld is not sector aligned\n",
 249                                 (long long)offset);
 250                         return 0;
 251
 252                 if (count & 0x1ff) {
 253                         printf("count %d is not sector aligned\n",
 254                                 count);
 255                         return 0;
 256                 }
 257         }
 258
 259         buf = qemu_io_alloc(count, 0xab);
 260
 261         gettimeofday(&t1, NULL);
 262         if (pflag)
 263                 cnt = do_pread(buf, offset, count, &total);
 264         else
 265                 cnt = do_read(buf, offset, count, &total);
 266         gettimeofday(&t2, NULL);
 267
 268         if (cnt < 0) {
 269                 printf("read failed: %s\n", strerror(-cnt));
 270                 return 0;
 271         }
 272
 273         if (qflag)
 274                 return 0;
 275
 276         if (vflag)
 277                 dump_buffer(buf, offset, count);
 278
 279         /* Finally, report back -- -C gives a parsable format */
 280         t2 = tsub(t2, t1);
 281         print_report("read", &t2, offset, count, total, cnt, Cflag);
 282
 283         qemu_io_free(buf);
 284
 285         return 0;
 286 }
 287
 288 static const cmdinfo_t read_cmd = {
 289         .name           = "read",
 290         .altname        = "r",
 291         .cfunc          = read_f,
 292         .argmin         = 2,
 293         .argmax         = -1,
 294         .args           = "[-aCpqv] off len",
 295         .oneline        = "reads a number of bytes at a specified offset",
 296         .help           = read_help,
 297 };
 298
 299 static const cmdinfo_t readv_cmd;
 300
 301 static void
 302 readv_help(void)
 303 {
 304         printf(
 305 "\n"
 306 " reads a range of bytes from the given offset into multiple buffers\n"
 307 "\n"
 308 " Example:\n"
 309 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 310 "\n"
 311 " Reads a segment of the currently open file, optionally dumping it to the\n"
 312 " standard output stream (with -v option) for subsequent inspection.\n"
 313 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 314 " -C, -- report statistics in a machine parsable format\n"
 315 " -v, -- dump buffer to standard output\n"
 316 " -q, -- quite mode, do not show I/O statistics\n"
 317 "\n");
 318 }
 319
 320 static int
 321 readv_f(int argc, char **argv)
 322 {
 323         struct timeval t1, t2;
 324         int Cflag = 0, qflag = 0, vflag = 0;
 325         int c, cnt;
 326         char *buf, *p;
 327         int64_t offset;
 328         int count = 0, total;
 329         int nr_iov, i;
 330         QEMUIOVector qiov;
 331
 332         while ((c = getopt(argc, argv, "Cqv")) != EOF) {
 333                 switch (c) {
 334                 case 'C':
 335                         Cflag = 1;
 336                         break;
 337                 case 'q':
 338                         qflag = 1;
 339                         break;
 340                 case 'v':
 341                         vflag = 1;
 342                         break;
 343                 default:
 344                         return command_usage(&readv_cmd);
 345                 }
 346         }
 347
 348         if (optind > argc - 2)
 349                 return command_usage(&readv_cmd);
 350
 351
 352         offset = cvtnum(argv[optind]);
 353         if (offset < 0) {
 354                 printf("non-numeric length argument -- %s\n", argv[optind]);
 355                 return 0;
 356         }
 357         optind++;
 358
 359         if (offset & 0x1ff) {
 360                 printf("offset %lld is not sector aligned\n",
 361                         (long long)offset);
 362                 return 0;
 363         }
 364
 365         if (count & 0x1ff) {
 366                 printf("count %d is not sector aligned\n",
 367                         count);
 368                 return 0;
 369         }
 370
 371         for (i = optind; i < argc; i++) {
 372                 size_t len;
 373
 374                 len = cvtnum(argv[i]);
 375                 if (len < 0) {
 376                         printf("non-numeric length argument -- %s\n", argv[i]);
 377                         return 0;
 378                 }
 379                 count += len;
 380         }
 381
 382         nr_iov = argc - optind;
 383         qemu_iovec_init(&qiov, nr_iov);
 384         buf = p = qemu_io_alloc(count, 0xab);
 385         for (i = 0; i < nr_iov; i++) {
 386                 size_t len;
 387
 388                 len = cvtnum(argv[optind]);
 389                 if (len < 0) {
 390                         printf("non-numeric length argument -- %s\n",
 391                                 argv[optind]);
 392                         return 0;
 393                 }
 394
 395                 qemu_iovec_add(&qiov, p, len);
 396                 p += len;
 397                 optind++;
 398         }
 399
 400         gettimeofday(&t1, NULL);
 401         cnt = do_aio_readv(&qiov, offset, &total);
 402         gettimeofday(&t2, NULL);
 403
 404         if (cnt < 0) {
 405                 printf("readv failed: %s\n", strerror(-cnt));
 406                 return 0;
 407         }
 408
 409         if (qflag)
 410                 return 0;
 411
 412         if (vflag)
 413                 dump_buffer(buf, offset, qiov.size);
 414
 415         /* Finally, report back -- -C gives a parsable format */
 416         t2 = tsub(t2, t1);
 417         print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 418
 419         qemu_io_free(buf);
 420
 421         return 0;
 422 }
 423
 424 static const cmdinfo_t readv_cmd = {
 425         .name           = "readv",
 426         .cfunc          = readv_f,
 427         .argmin         = 2,
 428         .argmax         = -1,
 429         .args           = "[-Cqv] off len [len..]",
 430         .oneline        = "reads a number of bytes at a specified offset",
 431         .help           = readv_help,
 432 };
 433
 434 static const cmdinfo_t write_cmd;
 435
 436 static void
 437 write_help(void)
 438 {
 439         printf(
 440 "\n"
 441 " writes a range of bytes from the given offset\n"
 442 "\n"
 443 " Example:\n"
 444 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 445 "\n"
 446 " Writes into a segment of the currently open file, using a buffer\n"
 447 " filled with a set pattern (0xcdcdcdcd).\n"
 448 " -p, -- use bdrv_pwrite to write the file\n"
 449 " -P, -- use different pattern to fill file\n"
 450 " -C, -- report statistics in a machine parsable format\n"
 451 " -q, -- quite mode, do not show I/O statistics\n"
 452 "\n");
 453 }
 454
 455 static int
 456 write_f(int argc, char **argv)
 457 {
 458         struct timeval t1, t2;
 459         int Cflag = 0, pflag = 0, qflag = 0;
 460         int c, cnt;
 461         char *buf;
 462         int64_t offset;
 463         int count, total;
 464         int pattern = 0xcd;
 465
 466         while ((c = getopt(argc, argv, "CpP:q")) != EOF) {
 467                 switch (c) {
 468                 case 'C':
 469                         Cflag = 1;
 470                         break;
 471                 case 'p':
 472                         pflag = 1;
 473                         break;
 474                 case 'P':
 475                         pattern = atoi(optarg);
 476                         break;
 477                 case 'q':
 478                         qflag = 1;
 479                         break;
 480                 default:
 481                         return command_usage(&write_cmd);
 482                 }
 483         }
 484
 485         if (optind != argc - 2)
 486                 return command_usage(&write_cmd);
 487
 488         offset = cvtnum(argv[optind]);
 489         if (offset < 0) {
 490                 printf("non-numeric length argument -- %s\n", argv[optind]);
 491                 return 0;
 492         }
 493
 494         optind++;
 495         count = cvtnum(argv[optind]);
 496         if (count < 0) {
 497                 printf("non-numeric length argument -- %s\n", argv[optind]);
 498                 return 0;
 499         }
 500
 501         if (!pflag) {
 502                 if (offset & 0x1ff) {
 503                         printf("offset %lld is not sector aligned\n",
 504                                 (long long)offset);
 505                         return 0;
 506                 }
 507
 508                 if (count & 0x1ff) {
 509                         printf("count %d is not sector aligned\n",
 510                                 count);
 511                         return 0;
 512                 }
 513         }
 514
 515         buf = qemu_io_alloc(count, pattern);
 516
 517         gettimeofday(&t1, NULL);
 518         if (pflag)
 519                 cnt = do_pwrite(buf, offset, count, &total);
 520         else
 521                 cnt = do_write(buf, offset, count, &total);
 522         gettimeofday(&t2, NULL);
 523
 524         if (cnt < 0) {
 525                 printf("write failed: %s\n", strerror(-cnt));
 526                 return 0;
 527         }
 528
 529         if (qflag)
 530                 return 0;
 531
 532         /* Finally, report back -- -C gives a parsable format */
 533         t2 = tsub(t2, t1);
 534         print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 535
 536         qemu_io_free(buf);
 537
 538         return 0;
 539 }
 540
 541 static const cmdinfo_t write_cmd = {
 542         .name           = "write",
 543         .altname        = "w",
 544         .cfunc          = write_f,
 545         .argmin         = 2,
 546         .argmax         = -1,
 547         .args           = "[-aCpq] [-P pattern ] off len",
 548         .oneline        = "writes a number of bytes at a specified offset",
 549         .help           = write_help,
 550 };
 551
 552 static const cmdinfo_t writev_cmd;
 553
 554 static void
 555 writev_help(void)
 556 {
 557         printf(
 558 "\n"
 559 " writes a range of bytes from the given offset source from multiple buffers\n"
 560 "\n"
 561 " Example:\n"
 562 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 563 "\n"
 564 " Writes into a segment of the currently open file, using a buffer\n"
 565 " filled with a set pattern (0xcdcdcdcd).\n"
 566 " -P, -- use different pattern to fill file\n"
 567 " -C, -- report statistics in a machine parsable format\n"
 568 " -q, -- quite mode, do not show I/O statistics\n"
 569 "\n");
 570 }
 571
 572 static int
 573 writev_f(int argc, char **argv)
 574 {
 575         struct timeval t1, t2;
 576         int Cflag = 0, qflag = 0;
 577         int c, cnt;
 578         char *buf, *p;
 579         int64_t offset;
 580         int count = 0, total;
 581         int nr_iov, i;
 582         int pattern = 0xcd;
 583         QEMUIOVector qiov;
 584
 585         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 586                 switch (c) {
 587                 case 'C':
 588                         Cflag = 1;
 589                         break;
 590                 case 'q':
 591                         qflag = 1;
 592                         break;
 593                 case 'P':
 594                         pattern = atoi(optarg);
 595                         break;
 596                 default:
 597                         return command_usage(&writev_cmd);
 598                 }
 599         }
 600
 601         if (optind > argc - 2)
 602                 return command_usage(&writev_cmd);
 603
 604         offset = cvtnum(argv[optind]);
 605         if (offset < 0) {
 606                 printf("non-numeric length argument -- %s\n", argv[optind]);
 607                 return 0;
 608         }
 609         optind++;
 610
 611         if (offset & 0x1ff) {
 612                 printf("offset %lld is not sector aligned\n",
 613                         (long long)offset);
 614                 return 0;
 615         }
 616
 617         if (count & 0x1ff) {
 618                 printf("count %d is not sector aligned\n",
 619                         count);
 620                 return 0;
 621         }
 622
 623
 624         for (i = optind; i < argc; i++) {
 625                 size_t len;
 626
 627                 len = cvtnum(argv[optind]);
 628                 if (len < 0) {
 629                         printf("non-numeric length argument -- %s\n", argv[i]);
 630                         return 0;
 631                 }
 632                 count += len;
 633         }
 634
 635         nr_iov = argc - optind;
 636         qemu_iovec_init(&qiov, nr_iov);
 637         buf = p = qemu_io_alloc(count, 0xab);
 638         for (i = 0; i < nr_iov; i++) {
 639                 size_t len;
 640
 641                 len = cvtnum(argv[optind]);
 642                 if (len < 0) {
 643                         printf("non-numeric length argument -- %s\n",
 644                                 argv[optind]);
 645                         return 0;
 646                 }
 647
 648                 qemu_iovec_add(&qiov, p, len);
 649                 p += len;
 650                 optind++;
 651         }
 652
 653         gettimeofday(&t1, NULL);
 654         cnt = do_aio_writev(&qiov, offset, &total);
 655         gettimeofday(&t2, NULL);
 656
 657         if (cnt < 0) {
 658                 printf("writev failed: %s\n", strerror(-cnt));
 659                 return 0;
 660         }
 661
 662         if (qflag)
 663                 return 0;
 664
 665         /* Finally, report back -- -C gives a parsable format */
 666         t2 = tsub(t2, t1);
 667         print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 668
 669         qemu_io_free(buf);
 670
 671         return 0;
 672 }
 673
 674 static const cmdinfo_t writev_cmd = {
 675         .name           = "writev",
 676         .cfunc          = writev_f,
 677         .argmin         = 2,
 678         .argmax         = -1,
 679         .args           = "[-Cq] [-P pattern ] off len [len..]",
 680         .oneline        = "writes a number of bytes at a specified offset",
 681         .help           = writev_help,
 682 };
 683
 684 static int
 685 flush_f(int argc, char **argv)
 686 {
 687         bdrv_flush(bs);
 688         return 0;
 689 }
 690
 691 static const cmdinfo_t flush_cmd = {
 692         .name           = "flush",
 693         .altname        = "f",
 694         .cfunc          = flush_f,
 695         .oneline        = "flush all in-core file state to disk",
 696 };
 697
 698 static int
 699 truncate_f(int argc, char **argv)
 700 {
 701         int64_t offset;
 702         int ret;
 703
 704         offset = cvtnum(argv[1]);
 705         if (offset < 0) {
 706                 printf("non-numeric truncate argument -- %s\n", argv[1]);
 707                 return 0;
 708         }
 709
 710         ret = bdrv_truncate(bs, offset);
 711         if (ret < 0) {
 712                 printf("truncate: %s", strerror(ret));
 713                 return 0;
 714         }
 715
 716         return 0;
 717 }
 718
 719 static const cmdinfo_t truncate_cmd = {
 720         .name           = "truncate",
 721         .altname        = "t",
 722         .cfunc          = truncate_f,
 723         .argmin         = 1,
 724         .argmax         = 1,
 725         .args           = "off",
 726         .oneline        = "truncates the current file at the given offset",
 727 };
 728
 729 static int
 730 length_f(int argc, char **argv)
 731 {
 732         int64_t size;
 733         char s1[64];
 734
 735         size = bdrv_getlength(bs);
 736         if (size < 0) {
 737                 printf("getlength: %s", strerror(size));
 738                 return 0;
 739         }
 740
 741         cvtstr(size, s1, sizeof(s1));
 742         printf("%s\n", s1);
 743         return 0;
 744 }
 745
 746
 747 static const cmdinfo_t length_cmd = {
 748         .name           = "length",
 749         .altname        = "l",
 750         .cfunc          = length_f,
 751         .oneline        = "gets the length of the current file",
 752 };
 753
 754
 755 static int
 756 info_f(int argc, char **argv)
 757 {
 758         BlockDriverInfo bdi;
 759         char s1[64], s2[64];
 760         int ret;
 761
 762         if (bs->drv && bs->drv->format_name)
 763                 printf("format name: %s\n", bs->drv->format_name);
 764         if (bs->drv && bs->drv->protocol_name)
 765                 printf("format name: %s\n", bs->drv->protocol_name);
 766
 767         ret = bdrv_get_info(bs, &bdi);
 768         if (ret)
 769                 return 0;
 770
 771         cvtstr(bdi.cluster_size, s1, sizeof(s1));
 772         cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
 773
 774         printf("cluster size: %s\n", s1);
 775         printf("vm state offset: %s\n", s2);
 776
 777         return 0;
 778 }
 779
 780
 781
 782 static const cmdinfo_t info_cmd = {
 783         .name           = "info",
 784         .altname        = "i",
 785         .cfunc          = info_f,
 786         .oneline        = "prints information about the current file",
 787 };
 788
 789 static int
 790 alloc_f(int argc, char **argv)
 791 {
 792         int64_t offset;
 793         int nb_sectors;
 794         char s1[64];
 795         int num;
 796         int ret;
 797
 798         offset = cvtnum(argv[1]);
 799         if (offset & 0x1ff) {
 800                 printf("offset %lld is not sector aligned\n",
 801                         (long long)offset);
 802                 return 0;
 803         }
 804
 805         if (argc == 3)
 806                 nb_sectors = cvtnum(argv[2]);
 807         else
 808                 nb_sectors = 1;
 809
 810         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
 811         if (ret) {
 812                 printf("is_allocated: %s", strerror(ret));
 813                 return 0;
 814         }
 815
 816         cvtstr(offset, s1, sizeof(s1));
 817
 818         if (nb_sectors == 1)
 819                 printf("sector allocated at offset %s\n", s1);
 820         else
 821                 printf("%d/%d sectors allocated at offset %s\n",
 822                         num, nb_sectors, s1);
 823         return 0;
 824 }
 825
 826 static const cmdinfo_t alloc_cmd = {
 827         .name           = "alloc",
 828         .altname        = "a",
 829         .argmin         = 1,
 830         .argmax         = 2,
 831         .cfunc          = alloc_f,
 832         .args           = "off [sectors]",
 833         .oneline        = "checks if a sector is present in the file",
 834 };
 835
 836 static int
 837 close_f(int argc, char **argv)
 838 {
 839         bdrv_close(bs);
 840         bs = NULL;
 841         return 0;
 842 }
 843
 844 static const cmdinfo_t close_cmd = {
 845         .name           = "close",
 846         .altname        = "c",
 847         .cfunc          = close_f,
 848         .oneline        = "close the current open file",
 849 };
 850
 851 static int openfile(char *name, int flags)
 852 {
 853         if (bs) {
 854                 fprintf(stderr, "file open already, try 'help close'\n");
 855                 return 1;
 856         }
 857
 858         bs = bdrv_new("hda");
 859         if (!bs)
 860                 return 1;
 861
 862         if (bdrv_open(bs, name, flags) == -1) {
 863                 fprintf(stderr, "%s: can't open device %s\n", progname, name);
 864                 bs = NULL;
 865                 return 1;
 866         }
 867
 868         return 0;
 869 }
 870
 871 static void
 872 open_help(void)
 873 {
 874         printf(
 875 "\n"
 876 " opens a new file in the requested mode\n"
 877 "\n"
 878 " Example:\n"
 879 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
 880 "\n"
 881 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
 882 " -C, -- create new file if it doesn't exist\n"
 883 " -r, -- open file read-only\n"
 884 " -s, -- use snapshot file\n"
 885 " -n, -- disable host cache\n"
 886 "\n");
 887 }
 888
 889 static const cmdinfo_t open_cmd;
 890
 891 static int
 892 open_f(int argc, char **argv)
 893 {
 894         int flags = 0;
 895         int readonly = 0;
 896         int c;
 897
 898         while ((c = getopt(argc, argv, "snCr")) != EOF) {
 899                 switch (c) {
 900                 case 's':
 901                         flags |= BDRV_O_SNAPSHOT;
 902                         break;
 903                 case 'n':
 904                         flags |= BDRV_O_NOCACHE;
 905                         break;
 906                 case 'C':
 907                         flags |= BDRV_O_CREAT;
 908                         break;
 909                 case 'r':
 910                         readonly = 1;
 911                         break;
 912                 default:
 913                         return command_usage(&open_cmd);
 914                 }
 915         }
 916
 917         if (readonly)
 918                 flags |= BDRV_O_RDONLY;
 919         else
 920                 flags |= BDRV_O_RDWR;
 921
 922         if (optind != argc - 1)
 923                 return command_usage(&open_cmd);
 924
 925         return openfile(argv[optind], flags);
 926 }
 927
 928 static const cmdinfo_t open_cmd = {
 929         .name           = "open",
 930         .altname        = "o",
 931         .cfunc          = open_f,
 932         .argmin         = 1,
 933         .argmax         = -1,
 934         .flags          = CMD_NOFILE_OK,
 935         .args           = "[-Crsn] [path]",
 936         .oneline        = "open the file specified by path",
 937         .help           = open_help,
 938 };
 939
 940 static int
 941 init_args_command(
 942         int     index)
 943 {
 944         /* only one device allowed so far */
 945         if (index >= 1)
 946                 return 0;
 947         return ++index;
 948 }
 949
 950 static int
 951 init_check_command(
 952         const cmdinfo_t *ct)
 953 {
 954         if (ct->flags & CMD_FLAG_GLOBAL)
 955                 return 1;
 956         if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
 957                 fprintf(stderr, "no file open, try 'help open'\n");
 958                 return 0;
 959         }
 960         return 1;
 961 }
 962
 963 static void usage(const char *name)
 964 {
 965         printf(
 966 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
 967 "QEMU Disk excerciser\n"
 968 "\n"
 969 "  -C, --create         create new file if it doesn't exist\n"
 970 "  -c, --cmd            command to execute\n"
 971 "  -r, --read-only      export read-only\n"
 972 "  -s, --snapshot       use snapshot file\n"
 973 "  -n, --nocache        disable host cache\n"
 974 "  -m, --misalign       misalign allocations for O_DIRECT\n"
 975 "  -h, --help           display this help and exit\n"
 976 "  -V, --version        output version information and exit\n"
 977 "\n",
 978         name);
 979 }
 980
 981
 982 int main(int argc, char **argv)
 983 {
 984         int readonly = 0;
 985         const char *sopt = "hVc:Crsnm";
 986         struct option lopt[] = {
 987                 { "help", 0, 0, 'h' },
 988                 { "version", 0, 0, 'V' },
 989                 { "offset", 1, 0, 'o' },
 990                 { "cmd", 1, 0, 'c' },
 991                 { "create", 0, 0, 'C' },
 992                 { "read-only", 0, 0, 'r' },
 993                 { "snapshot", 0, 0, 's' },
 994                 { "nocache", 0, 0, 'n' },
 995                 { "misalign", 0, 0, 'm' },
 996                 { NULL, 0, 0, 0 }
 997         };
 998         int c;
 999         int opt_index = 0;
1000         int flags = 0;
1001
1002         progname = basename(argv[0]);
1003
1004         while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1005                 switch (c) {
1006                 case 's':
1007                         flags |= BDRV_O_SNAPSHOT;
1008                         break;
1009                 case 'n':
1010                         flags |= BDRV_O_NOCACHE;
1011                         break;
1012                 case 'c':
1013                         add_user_command(optarg);
1014                         break;
1015                 case 'C':
1016                         flags |= BDRV_O_CREAT;
1017                         break;
1018                 case 'r':
1019                         readonly = 1;
1020                         break;
1021                 case 'm':
1022                         misalign = 1;
1023                         break;
1024                 case 'V':
1025                         printf("%s version %s\n", progname, VERSION);
1026                         exit(0);
1027                 case 'h':
1028                         usage(progname);
1029                         exit(0);
1030                 default:
1031                         usage(progname);
1032                         exit(1);
1033                 }
1034         }
1035
1036         if ((argc - optind) > 1) {
1037                 usage(progname);
1038                 exit(1);
1039         }
1040
1041         bdrv_init();
1042
1043         /* initialize commands */
1044         quit_init();
1045         help_init();
1046         add_command(&open_cmd);
1047         add_command(&close_cmd);
1048         add_command(&read_cmd);
1049         add_command(&readv_cmd);
1050         add_command(&write_cmd);
1051         add_command(&writev_cmd);
1052         add_command(&flush_cmd);
1053         add_command(&truncate_cmd);
1054         add_command(&length_cmd);
1055         add_command(&info_cmd);
1056         add_command(&alloc_cmd);
1057
1058         add_args_command(init_args_command);
1059         add_check_command(init_check_command);
1060
1061         /* open the device */
1062         if (readonly)
1063                 flags |= BDRV_O_RDONLY;
1064         else
1065                 flags |= BDRV_O_RDWR;
1066
1067         if ((argc - optind) == 1)
1068                 openfile(argv[optind], flags);
1069         command_loop();
1070
1071         if (bs)
1072                 bdrv_close(bs);
1073         return 0;
1074 }