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;
 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 " -C, -- report statistics in a machine parsable format\n"
 195 " -l, -- length for pattern verification (only with -P)\n"
 196 " -p, -- use bdrv_pread to read the file\n"
 197 " -P, -- use a pattern to verify read data\n"
 198 " -q, -- quite mode, do not show I/O statistics\n"
 199 " -s, -- start offset for pattern verification (only with -P)\n"
 200 " -v, -- dump buffer to standard output\n"
 201 "\n");
 202 }
 203
 204 static int
 205 read_f(int argc, char **argv)
 206 {
 207         struct timeval t1, t2;
 208         int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 209         int Pflag = 0, sflag = 0, lflag = 0;
 210         int c, cnt;
 211         char *buf;
 212         int64_t offset;
 213         int count, total;
 214         int pattern = 0, pattern_offset = 0, pattern_count = 0;
 215
 216         while ((c = getopt(argc, argv, "Cl:pP:qs:v")) != EOF) {
 217                 switch (c) {
 218                 case 'C':
 219                         Cflag = 1;
 220                         break;
 221                 case 'l':
 222                         lflag = 1;
 223                         pattern_count = cvtnum(optarg);
 224                         if (pattern_count < 0) {
 225                                 printf("non-numeric length argument -- %s\n", optarg);
 226                                 return 0;
 227                         }
 228                         break;
 229                 case 'p':
 230                         pflag = 1;
 231                         break;
 232                 case 'P':
 233                         Pflag = 1;
 234                         pattern = atoi(optarg);
 235                         break;
 236                 case 'q':
 237                         qflag = 1;
 238                         break;
 239                 case 's':
 240                         sflag = 1;
 241                         pattern_offset = cvtnum(optarg);
 242                         if (pattern_offset < 0) {
 243                                 printf("non-numeric length argument -- %s\n", optarg);
 244                                 return 0;
 245                         }
 246                         break;
 247                 case 'v':
 248                         vflag = 1;
 249                         break;
 250                 default:
 251                         return command_usage(&read_cmd);
 252                 }
 253         }
 254
 255         if (optind != argc - 2)
 256                 return command_usage(&read_cmd);
 257
 258         offset = cvtnum(argv[optind]);
 259         if (offset < 0) {
 260                 printf("non-numeric length argument -- %s\n", argv[optind]);
 261                 return 0;
 262         }
 263
 264         optind++;
 265         count = cvtnum(argv[optind]);
 266         if (count < 0) {
 267                 printf("non-numeric length argument -- %s\n", argv[optind]);
 268                 return 0;
 269         }
 270
 271     if (!Pflag && (lflag || sflag)) {
 272         return command_usage(&read_cmd);
 273     }
 274
 275     if (!lflag) {
 276         pattern_count = count - pattern_offset;
 277     }
 278
 279     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 280         printf("pattern verfication range exceeds end of read data\n");
 281         return 0;
 282     }
 283
 284         if (!pflag)
 285                 if (offset & 0x1ff) {
 286                         printf("offset %lld is not sector aligned\n",
 287                                 (long long)offset);
 288                         return 0;
 289
 290                 if (count & 0x1ff) {
 291                         printf("count %d is not sector aligned\n",
 292                                 count);
 293                         return 0;
 294                 }
 295         }
 296
 297         buf = qemu_io_alloc(count, 0xab);
 298
 299         gettimeofday(&t1, NULL);
 300         if (pflag)
 301                 cnt = do_pread(buf, offset, count, &total);
 302         else
 303                 cnt = do_read(buf, offset, count, &total);
 304         gettimeofday(&t2, NULL);
 305
 306         if (cnt < 0) {
 307                 printf("read failed: %s\n", strerror(-cnt));
 308                 return 0;
 309         }
 310
 311         if (Pflag) {
 312                 void* cmp_buf = malloc(pattern_count);
 313                 memset(cmp_buf, pattern, pattern_count);
 314                 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 315                         printf("Pattern verification failed at offset %lld, "
 316                                 "%d bytes\n",
 317                                 (long long) offset + pattern_offset, pattern_count);
 318                 }
 319                 free(cmp_buf);
 320         }
 321
 322         if (qflag)
 323                 return 0;
 324
 325         if (vflag)
 326                 dump_buffer(buf, offset, count);
 327
 328         /* Finally, report back -- -C gives a parsable format */
 329         t2 = tsub(t2, t1);
 330         print_report("read", &t2, offset, count, total, cnt, Cflag);
 331
 332         qemu_io_free(buf);
 333
 334         return 0;
 335 }
 336
 337 static const cmdinfo_t read_cmd = {
 338         .name           = "read",
 339         .altname        = "r",
 340         .cfunc          = read_f,
 341         .argmin         = 2,
 342         .argmax         = -1,
 343         .args           = "[-aCpqv] [-P pattern [-s off] [-l len]] off len",
 344         .oneline        = "reads a number of bytes at a specified offset",
 345         .help           = read_help,
 346 };
 347
 348 static const cmdinfo_t readv_cmd;
 349
 350 static void
 351 readv_help(void)
 352 {
 353         printf(
 354 "\n"
 355 " reads a range of bytes from the given offset into multiple buffers\n"
 356 "\n"
 357 " Example:\n"
 358 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 359 "\n"
 360 " Reads a segment of the currently open file, optionally dumping it to the\n"
 361 " standard output stream (with -v option) for subsequent inspection.\n"
 362 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 363 " -C, -- report statistics in a machine parsable format\n"
 364 " -P, -- use a pattern to verify read data\n"
 365 " -v, -- dump buffer to standard output\n"
 366 " -q, -- quite mode, do not show I/O statistics\n"
 367 "\n");
 368 }
 369
 370 static int
 371 readv_f(int argc, char **argv)
 372 {
 373         struct timeval t1, t2;
 374         int Cflag = 0, qflag = 0, vflag = 0;
 375         int c, cnt;
 376         char *buf, *p;
 377         int64_t offset;
 378         int count = 0, total;
 379         int nr_iov, i;
 380         QEMUIOVector qiov;
 381         int pattern = 0;
 382         int Pflag = 0;
 383
 384         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 385                 switch (c) {
 386                 case 'C':
 387                         Cflag = 1;
 388                         break;
 389                 case 'P':
 390                         Pflag = 1;
 391                         pattern = atoi(optarg);
 392                         break;
 393                 case 'q':
 394                         qflag = 1;
 395                         break;
 396                 case 'v':
 397                         vflag = 1;
 398                         break;
 399                 default:
 400                         return command_usage(&readv_cmd);
 401                 }
 402         }
 403
 404         if (optind > argc - 2)
 405                 return command_usage(&readv_cmd);
 406
 407
 408         offset = cvtnum(argv[optind]);
 409         if (offset < 0) {
 410                 printf("non-numeric length argument -- %s\n", argv[optind]);
 411                 return 0;
 412         }
 413         optind++;
 414
 415         if (offset & 0x1ff) {
 416                 printf("offset %lld is not sector aligned\n",
 417                         (long long)offset);
 418                 return 0;
 419         }
 420
 421         if (count & 0x1ff) {
 422                 printf("count %d is not sector aligned\n",
 423                         count);
 424                 return 0;
 425         }
 426
 427         for (i = optind; i < argc; i++) {
 428                 size_t len;
 429
 430                 len = cvtnum(argv[i]);
 431                 if (len < 0) {
 432                         printf("non-numeric length argument -- %s\n", argv[i]);
 433                         return 0;
 434                 }
 435                 count += len;
 436         }
 437
 438         nr_iov = argc - optind;
 439         qemu_iovec_init(&qiov, nr_iov);
 440         buf = p = qemu_io_alloc(count, 0xab);
 441         for (i = 0; i < nr_iov; i++) {
 442                 size_t len;
 443
 444                 len = cvtnum(argv[optind]);
 445                 if (len < 0) {
 446                         printf("non-numeric length argument -- %s\n",
 447                                 argv[optind]);
 448                         return 0;
 449                 }
 450
 451                 qemu_iovec_add(&qiov, p, len);
 452                 p += len;
 453                 optind++;
 454         }
 455
 456         gettimeofday(&t1, NULL);
 457         cnt = do_aio_readv(&qiov, offset, &total);
 458         gettimeofday(&t2, NULL);
 459
 460         if (cnt < 0) {
 461                 printf("readv failed: %s\n", strerror(-cnt));
 462                 return 0;
 463         }
 464
 465         if (Pflag) {
 466                 void* cmp_buf = malloc(count);
 467                 memset(cmp_buf, pattern, count);
 468                 if (memcmp(buf, cmp_buf, count)) {
 469                         printf("Pattern verification failed at offset %lld, "
 470                                 "%d bytes\n",
 471                                 (long long) offset, count);
 472                 }
 473                 free(cmp_buf);
 474         }
 475
 476         if (qflag)
 477                 return 0;
 478
 479         if (vflag)
 480                 dump_buffer(buf, offset, qiov.size);
 481
 482         /* Finally, report back -- -C gives a parsable format */
 483         t2 = tsub(t2, t1);
 484         print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 485
 486         qemu_io_free(buf);
 487
 488         return 0;
 489 }
 490
 491 static const cmdinfo_t readv_cmd = {
 492         .name           = "readv",
 493         .cfunc          = readv_f,
 494         .argmin         = 2,
 495         .argmax         = -1,
 496         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 497         .oneline        = "reads a number of bytes at a specified offset",
 498         .help           = readv_help,
 499 };
 500
 501 static const cmdinfo_t write_cmd;
 502
 503 static void
 504 write_help(void)
 505 {
 506         printf(
 507 "\n"
 508 " writes a range of bytes from the given offset\n"
 509 "\n"
 510 " Example:\n"
 511 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 512 "\n"
 513 " Writes into a segment of the currently open file, using a buffer\n"
 514 " filled with a set pattern (0xcdcdcdcd).\n"
 515 " -p, -- use bdrv_pwrite to write the file\n"
 516 " -P, -- use different pattern to fill file\n"
 517 " -C, -- report statistics in a machine parsable format\n"
 518 " -q, -- quite mode, do not show I/O statistics\n"
 519 "\n");
 520 }
 521
 522 static int
 523 write_f(int argc, char **argv)
 524 {
 525         struct timeval t1, t2;
 526         int Cflag = 0, pflag = 0, qflag = 0;
 527         int c, cnt;
 528         char *buf;
 529         int64_t offset;
 530         int count, total;
 531         int pattern = 0xcd;
 532
 533         while ((c = getopt(argc, argv, "CpP:q")) != EOF) {
 534                 switch (c) {
 535                 case 'C':
 536                         Cflag = 1;
 537                         break;
 538                 case 'p':
 539                         pflag = 1;
 540                         break;
 541                 case 'P':
 542                         pattern = atoi(optarg);
 543                         break;
 544                 case 'q':
 545                         qflag = 1;
 546                         break;
 547                 default:
 548                         return command_usage(&write_cmd);
 549                 }
 550         }
 551
 552         if (optind != argc - 2)
 553                 return command_usage(&write_cmd);
 554
 555         offset = cvtnum(argv[optind]);
 556         if (offset < 0) {
 557                 printf("non-numeric length argument -- %s\n", argv[optind]);
 558                 return 0;
 559         }
 560
 561         optind++;
 562         count = cvtnum(argv[optind]);
 563         if (count < 0) {
 564                 printf("non-numeric length argument -- %s\n", argv[optind]);
 565                 return 0;
 566         }
 567
 568         if (!pflag) {
 569                 if (offset & 0x1ff) {
 570                         printf("offset %lld is not sector aligned\n",
 571                                 (long long)offset);
 572                         return 0;
 573                 }
 574
 575                 if (count & 0x1ff) {
 576                         printf("count %d is not sector aligned\n",
 577                                 count);
 578                         return 0;
 579                 }
 580         }
 581
 582         buf = qemu_io_alloc(count, pattern);
 583
 584         gettimeofday(&t1, NULL);
 585         if (pflag)
 586                 cnt = do_pwrite(buf, offset, count, &total);
 587         else
 588                 cnt = do_write(buf, offset, count, &total);
 589         gettimeofday(&t2, NULL);
 590
 591         if (cnt < 0) {
 592                 printf("write failed: %s\n", strerror(-cnt));
 593                 return 0;
 594         }
 595
 596         if (qflag)
 597                 return 0;
 598
 599         /* Finally, report back -- -C gives a parsable format */
 600         t2 = tsub(t2, t1);
 601         print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 602
 603         qemu_io_free(buf);
 604
 605         return 0;
 606 }
 607
 608 static const cmdinfo_t write_cmd = {
 609         .name           = "write",
 610         .altname        = "w",
 611         .cfunc          = write_f,
 612         .argmin         = 2,
 613         .argmax         = -1,
 614         .args           = "[-aCpq] [-P pattern ] off len",
 615         .oneline        = "writes a number of bytes at a specified offset",
 616         .help           = write_help,
 617 };
 618
 619 static const cmdinfo_t writev_cmd;
 620
 621 static void
 622 writev_help(void)
 623 {
 624         printf(
 625 "\n"
 626 " writes a range of bytes from the given offset source from multiple buffers\n"
 627 "\n"
 628 " Example:\n"
 629 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 630 "\n"
 631 " Writes into a segment of the currently open file, using a buffer\n"
 632 " filled with a set pattern (0xcdcdcdcd).\n"
 633 " -P, -- use different pattern to fill file\n"
 634 " -C, -- report statistics in a machine parsable format\n"
 635 " -q, -- quite mode, do not show I/O statistics\n"
 636 "\n");
 637 }
 638
 639 static int
 640 writev_f(int argc, char **argv)
 641 {
 642         struct timeval t1, t2;
 643         int Cflag = 0, qflag = 0;
 644         int c, cnt;
 645         char *buf, *p;
 646         int64_t offset;
 647         int count = 0, total;
 648         int nr_iov, i;
 649         int pattern = 0xcd;
 650         QEMUIOVector qiov;
 651
 652         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 653                 switch (c) {
 654                 case 'C':
 655                         Cflag = 1;
 656                         break;
 657                 case 'q':
 658                         qflag = 1;
 659                         break;
 660                 case 'P':
 661                         pattern = atoi(optarg);
 662                         break;
 663                 default:
 664                         return command_usage(&writev_cmd);
 665                 }
 666         }
 667
 668         if (optind > argc - 2)
 669                 return command_usage(&writev_cmd);
 670
 671         offset = cvtnum(argv[optind]);
 672         if (offset < 0) {
 673                 printf("non-numeric length argument -- %s\n", argv[optind]);
 674                 return 0;
 675         }
 676         optind++;
 677
 678         if (offset & 0x1ff) {
 679                 printf("offset %lld is not sector aligned\n",
 680                         (long long)offset);
 681                 return 0;
 682         }
 683
 684         if (count & 0x1ff) {
 685                 printf("count %d is not sector aligned\n",
 686                         count);
 687                 return 0;
 688         }
 689
 690
 691         for (i = optind; i < argc; i++) {
 692                 size_t len;
 693
 694                 len = cvtnum(argv[optind]);
 695                 if (len < 0) {
 696                         printf("non-numeric length argument -- %s\n", argv[i]);
 697                         return 0;
 698                 }
 699                 count += len;
 700         }
 701
 702         nr_iov = argc - optind;
 703         qemu_iovec_init(&qiov, nr_iov);
 704         buf = p = qemu_io_alloc(count, pattern);
 705         for (i = 0; i < nr_iov; i++) {
 706                 size_t len;
 707
 708                 len = cvtnum(argv[optind]);
 709                 if (len < 0) {
 710                         printf("non-numeric length argument -- %s\n",
 711                                 argv[optind]);
 712                         return 0;
 713                 }
 714
 715                 qemu_iovec_add(&qiov, p, len);
 716                 p += len;
 717                 optind++;
 718         }
 719
 720         gettimeofday(&t1, NULL);
 721         cnt = do_aio_writev(&qiov, offset, &total);
 722         gettimeofday(&t2, NULL);
 723
 724         if (cnt < 0) {
 725                 printf("writev failed: %s\n", strerror(-cnt));
 726                 return 0;
 727         }
 728
 729         if (qflag)
 730                 return 0;
 731
 732         /* Finally, report back -- -C gives a parsable format */
 733         t2 = tsub(t2, t1);
 734         print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 735
 736         qemu_io_free(buf);
 737
 738         return 0;
 739 }
 740
 741 static const cmdinfo_t writev_cmd = {
 742         .name           = "writev",
 743         .cfunc          = writev_f,
 744         .argmin         = 2,
 745         .argmax         = -1,
 746         .args           = "[-Cq] [-P pattern ] off len [len..]",
 747         .oneline        = "writes a number of bytes at a specified offset",
 748         .help           = writev_help,
 749 };
 750
 751 static int
 752 flush_f(int argc, char **argv)
 753 {
 754         bdrv_flush(bs);
 755         return 0;
 756 }
 757
 758 static const cmdinfo_t flush_cmd = {
 759         .name           = "flush",
 760         .altname        = "f",
 761         .cfunc          = flush_f,
 762         .oneline        = "flush all in-core file state to disk",
 763 };
 764
 765 static int
 766 truncate_f(int argc, char **argv)
 767 {
 768         int64_t offset;
 769         int ret;
 770
 771         offset = cvtnum(argv[1]);
 772         if (offset < 0) {
 773                 printf("non-numeric truncate argument -- %s\n", argv[1]);
 774                 return 0;
 775         }
 776
 777         ret = bdrv_truncate(bs, offset);
 778         if (ret < 0) {
 779                 printf("truncate: %s", strerror(ret));
 780                 return 0;
 781         }
 782
 783         return 0;
 784 }
 785
 786 static const cmdinfo_t truncate_cmd = {
 787         .name           = "truncate",
 788         .altname        = "t",
 789         .cfunc          = truncate_f,
 790         .argmin         = 1,
 791         .argmax         = 1,
 792         .args           = "off",
 793         .oneline        = "truncates the current file at the given offset",
 794 };
 795
 796 static int
 797 length_f(int argc, char **argv)
 798 {
 799         int64_t size;
 800         char s1[64];
 801
 802         size = bdrv_getlength(bs);
 803         if (size < 0) {
 804                 printf("getlength: %s", strerror(size));
 805                 return 0;
 806         }
 807
 808         cvtstr(size, s1, sizeof(s1));
 809         printf("%s\n", s1);
 810         return 0;
 811 }
 812
 813
 814 static const cmdinfo_t length_cmd = {
 815         .name           = "length",
 816         .altname        = "l",
 817         .cfunc          = length_f,
 818         .oneline        = "gets the length of the current file",
 819 };
 820
 821
 822 static int
 823 info_f(int argc, char **argv)
 824 {
 825         BlockDriverInfo bdi;
 826         char s1[64], s2[64];
 827         int ret;
 828
 829         if (bs->drv && bs->drv->format_name)
 830                 printf("format name: %s\n", bs->drv->format_name);
 831         if (bs->drv && bs->drv->protocol_name)
 832                 printf("format name: %s\n", bs->drv->protocol_name);
 833
 834         ret = bdrv_get_info(bs, &bdi);
 835         if (ret)
 836                 return 0;
 837
 838         cvtstr(bdi.cluster_size, s1, sizeof(s1));
 839         cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
 840
 841         printf("cluster size: %s\n", s1);
 842         printf("vm state offset: %s\n", s2);
 843
 844         return 0;
 845 }
 846
 847
 848
 849 static const cmdinfo_t info_cmd = {
 850         .name           = "info",
 851         .altname        = "i",
 852         .cfunc          = info_f,
 853         .oneline        = "prints information about the current file",
 854 };
 855
 856 static int
 857 alloc_f(int argc, char **argv)
 858 {
 859         int64_t offset;
 860         int nb_sectors;
 861         char s1[64];
 862         int num;
 863         int ret;
 864         const char *retstr;
 865
 866         offset = cvtnum(argv[1]);
 867         if (offset & 0x1ff) {
 868                 printf("offset %lld is not sector aligned\n",
 869                         (long long)offset);
 870                 return 0;
 871         }
 872
 873         if (argc == 3)
 874                 nb_sectors = cvtnum(argv[2]);
 875         else
 876                 nb_sectors = 1;
 877
 878         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
 879
 880         cvtstr(offset, s1, sizeof(s1));
 881
 882         retstr = ret ? "allocated" : "not allocated";
 883         if (nb_sectors == 1)
 884                 printf("sector %s at offset %s\n", retstr, s1);
 885         else
 886                 printf("%d/%d sectors %s at offset %s\n",
 887                         num, nb_sectors, retstr, s1);
 888         return 0;
 889 }
 890
 891 static const cmdinfo_t alloc_cmd = {
 892         .name           = "alloc",
 893         .altname        = "a",
 894         .argmin         = 1,
 895         .argmax         = 2,
 896         .cfunc          = alloc_f,
 897         .args           = "off [sectors]",
 898         .oneline        = "checks if a sector is present in the file",
 899 };
 900
 901 static int
 902 close_f(int argc, char **argv)
 903 {
 904         bdrv_close(bs);
 905         bs = NULL;
 906         return 0;
 907 }
 908
 909 static const cmdinfo_t close_cmd = {
 910         .name           = "close",
 911         .altname        = "c",
 912         .cfunc          = close_f,
 913         .oneline        = "close the current open file",
 914 };
 915
 916 static int openfile(char *name, int flags)
 917 {
 918         if (bs) {
 919                 fprintf(stderr, "file open already, try 'help close'\n");
 920                 return 1;
 921         }
 922
 923         bs = bdrv_new("hda");
 924         if (!bs)
 925                 return 1;
 926
 927         if (bdrv_open(bs, name, flags) == -1) {
 928                 fprintf(stderr, "%s: can't open device %s\n", progname, name);
 929                 bs = NULL;
 930                 return 1;
 931         }
 932
 933         return 0;
 934 }
 935
 936 static void
 937 open_help(void)
 938 {
 939         printf(
 940 "\n"
 941 " opens a new file in the requested mode\n"
 942 "\n"
 943 " Example:\n"
 944 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
 945 "\n"
 946 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
 947 " -C, -- create new file if it doesn't exist\n"
 948 " -r, -- open file read-only\n"
 949 " -s, -- use snapshot file\n"
 950 " -n, -- disable host cache\n"
 951 "\n");
 952 }
 953
 954 static const cmdinfo_t open_cmd;
 955
 956 static int
 957 open_f(int argc, char **argv)
 958 {
 959         int flags = 0;
 960         int readonly = 0;
 961         int c;
 962
 963         while ((c = getopt(argc, argv, "snCr")) != EOF) {
 964                 switch (c) {
 965                 case 's':
 966                         flags |= BDRV_O_SNAPSHOT;
 967                         break;
 968                 case 'n':
 969                         flags |= BDRV_O_NOCACHE;
 970                         break;
 971                 case 'C':
 972                         flags |= BDRV_O_CREAT;
 973                         break;
 974                 case 'r':
 975                         readonly = 1;
 976                         break;
 977                 default:
 978                         return command_usage(&open_cmd);
 979                 }
 980         }
 981
 982         if (readonly)
 983                 flags |= BDRV_O_RDONLY;
 984         else
 985                 flags |= BDRV_O_RDWR;
 986
 987         if (optind != argc - 1)
 988                 return command_usage(&open_cmd);
 989
 990         return openfile(argv[optind], flags);
 991 }
 992
 993 static const cmdinfo_t open_cmd = {
 994         .name           = "open",
 995         .altname        = "o",
 996         .cfunc          = open_f,
 997         .argmin         = 1,
 998         .argmax         = -1,
 999         .flags          = CMD_NOFILE_OK,
1000         .args           = "[-Crsn] [path]",
1001         .oneline        = "open the file specified by path",
1002         .help           = open_help,
1003 };
1004
1005 static int
1006 init_args_command(
1007         int     index)
1008 {
1009         /* only one device allowed so far */
1010         if (index >= 1)
1011                 return 0;
1012         return ++index;
1013 }
1014
1015 static int
1016 init_check_command(
1017         const cmdinfo_t *ct)
1018 {
1019         if (ct->flags & CMD_FLAG_GLOBAL)
1020                 return 1;
1021         if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1022                 fprintf(stderr, "no file open, try 'help open'\n");
1023                 return 0;
1024         }
1025         return 1;
1026 }
1027
1028 static void usage(const char *name)
1029 {
1030         printf(
1031 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
1032 "QEMU Disk excerciser\n"
1033 "\n"
1034 "  -C, --create         create new file if it doesn't exist\n"
1035 "  -c, --cmd            command to execute\n"
1036 "  -r, --read-only      export read-only\n"
1037 "  -s, --snapshot       use snapshot file\n"
1038 "  -n, --nocache        disable host cache\n"
1039 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1040 "  -h, --help           display this help and exit\n"
1041 "  -V, --version        output version information and exit\n"
1042 "\n",
1043         name);
1044 }
1045
1046
1047 int main(int argc, char **argv)
1048 {
1049         int readonly = 0;
1050         const char *sopt = "hVc:Crsnm";
1051         struct option lopt[] = {
1052                 { "help", 0, 0, 'h' },
1053                 { "version", 0, 0, 'V' },
1054                 { "offset", 1, 0, 'o' },
1055                 { "cmd", 1, 0, 'c' },
1056                 { "create", 0, 0, 'C' },
1057                 { "read-only", 0, 0, 'r' },
1058                 { "snapshot", 0, 0, 's' },
1059                 { "nocache", 0, 0, 'n' },
1060                 { "misalign", 0, 0, 'm' },
1061                 { NULL, 0, 0, 0 }
1062         };
1063         int c;
1064         int opt_index = 0;
1065         int flags = 0;
1066
1067         progname = basename(argv[0]);
1068
1069         while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1070                 switch (c) {
1071                 case 's':
1072                         flags |= BDRV_O_SNAPSHOT;
1073                         break;
1074                 case 'n':
1075                         flags |= BDRV_O_NOCACHE;
1076                         break;
1077                 case 'c':
1078                         add_user_command(optarg);
1079                         break;
1080                 case 'C':
1081                         flags |= BDRV_O_CREAT;
1082                         break;
1083                 case 'r':
1084                         readonly = 1;
1085                         break;
1086                 case 'm':
1087                         misalign = 1;
1088                         break;
1089                 case 'V':
1090                         printf("%s version %s\n", progname, VERSION);
1091                         exit(0);
1092                 case 'h':
1093                         usage(progname);
1094                         exit(0);
1095                 default:
1096                         usage(progname);
1097                         exit(1);
1098                 }
1099         }
1100
1101         if ((argc - optind) > 1) {
1102                 usage(progname);
1103                 exit(1);
1104         }
1105
1106         bdrv_init();
1107
1108         /* initialize commands */
1109         quit_init();
1110         help_init();
1111         add_command(&open_cmd);
1112         add_command(&close_cmd);
1113         add_command(&read_cmd);
1114         add_command(&readv_cmd);
1115         add_command(&write_cmd);
1116         add_command(&writev_cmd);
1117         add_command(&flush_cmd);
1118         add_command(&truncate_cmd);
1119         add_command(&length_cmd);
1120         add_command(&info_cmd);
1121         add_command(&alloc_cmd);
1122
1123         add_args_command(init_args_command);
1124         add_check_command(init_check_command);
1125
1126         /* open the device */
1127         if (readonly)
1128                 flags |= BDRV_O_RDONLY;
1129         else
1130                 flags |= BDRV_O_RDWR;
1131
1132         if ((argc - optind) == 1)
1133                 openfile(argv[optind], flags);
1134         command_loop();
1135
1136         if (bs)
1137                 bdrv_close(bs);
1138         return 0;
1139 }