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;
 214         /* Some compilers get confused and warn if this is not initialized.  */
 215         int total = 0;
 216         int pattern = 0, pattern_offset = 0, pattern_count = 0;
 217
 218         while ((c = getopt(argc, argv, "Cl:pP:qs:v")) != EOF) {
 219                 switch (c) {
 220                 case 'C':
 221                         Cflag = 1;
 222                         break;
 223                 case 'l':
 224                         lflag = 1;
 225                         pattern_count = cvtnum(optarg);
 226                         if (pattern_count < 0) {
 227                                 printf("non-numeric length argument -- %s\n", optarg);
 228                                 return 0;
 229                         }
 230                         break;
 231                 case 'p':
 232                         pflag = 1;
 233                         break;
 234                 case 'P':
 235                         Pflag = 1;
 236                         pattern = atoi(optarg);
 237                         break;
 238                 case 'q':
 239                         qflag = 1;
 240                         break;
 241                 case 's':
 242                         sflag = 1;
 243                         pattern_offset = cvtnum(optarg);
 244                         if (pattern_offset < 0) {
 245                                 printf("non-numeric length argument -- %s\n", optarg);
 246                                 return 0;
 247                         }
 248                         break;
 249                 case 'v':
 250                         vflag = 1;
 251                         break;
 252                 default:
 253                         return command_usage(&read_cmd);
 254                 }
 255         }
 256
 257         if (optind != argc - 2)
 258                 return command_usage(&read_cmd);
 259
 260         offset = cvtnum(argv[optind]);
 261         if (offset < 0) {
 262                 printf("non-numeric length argument -- %s\n", argv[optind]);
 263                 return 0;
 264         }
 265
 266         optind++;
 267         count = cvtnum(argv[optind]);
 268         if (count < 0) {
 269                 printf("non-numeric length argument -- %s\n", argv[optind]);
 270                 return 0;
 271         }
 272
 273     if (!Pflag && (lflag || sflag)) {
 274         return command_usage(&read_cmd);
 275     }
 276
 277     if (!lflag) {
 278         pattern_count = count - pattern_offset;
 279     }
 280
 281     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 282         printf("pattern verfication range exceeds end of read data\n");
 283         return 0;
 284     }
 285
 286         if (!pflag)
 287                 if (offset & 0x1ff) {
 288                         printf("offset %lld is not sector aligned\n",
 289                                 (long long)offset);
 290                         return 0;
 291
 292                 if (count & 0x1ff) {
 293                         printf("count %d is not sector aligned\n",
 294                                 count);
 295                         return 0;
 296                 }
 297         }
 298
 299         buf = qemu_io_alloc(count, 0xab);
 300
 301         gettimeofday(&t1, NULL);
 302         if (pflag)
 303                 cnt = do_pread(buf, offset, count, &total);
 304         else
 305                 cnt = do_read(buf, offset, count, &total);
 306         gettimeofday(&t2, NULL);
 307
 308         if (cnt < 0) {
 309                 printf("read failed: %s\n", strerror(-cnt));
 310                 return 0;
 311         }
 312
 313         if (Pflag) {
 314                 void* cmp_buf = malloc(pattern_count);
 315                 memset(cmp_buf, pattern, pattern_count);
 316                 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 317                         printf("Pattern verification failed at offset %lld, "
 318                                 "%d bytes\n",
 319                                 (long long) offset + pattern_offset, pattern_count);
 320                 }
 321                 free(cmp_buf);
 322         }
 323
 324         if (qflag)
 325                 return 0;
 326
 327         if (vflag)
 328                 dump_buffer(buf, offset, count);
 329
 330         /* Finally, report back -- -C gives a parsable format */
 331         t2 = tsub(t2, t1);
 332         print_report("read", &t2, offset, count, total, cnt, Cflag);
 333
 334         qemu_io_free(buf);
 335
 336         return 0;
 337 }
 338
 339 static const cmdinfo_t read_cmd = {
 340         .name           = "read",
 341         .altname        = "r",
 342         .cfunc          = read_f,
 343         .argmin         = 2,
 344         .argmax         = -1,
 345         .args           = "[-aCpqv] [-P pattern [-s off] [-l len]] off len",
 346         .oneline        = "reads a number of bytes at a specified offset",
 347         .help           = read_help,
 348 };
 349
 350 static const cmdinfo_t readv_cmd;
 351
 352 static void
 353 readv_help(void)
 354 {
 355         printf(
 356 "\n"
 357 " reads a range of bytes from the given offset into multiple buffers\n"
 358 "\n"
 359 " Example:\n"
 360 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 361 "\n"
 362 " Reads a segment of the currently open file, optionally dumping it to the\n"
 363 " standard output stream (with -v option) for subsequent inspection.\n"
 364 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 365 " -C, -- report statistics in a machine parsable format\n"
 366 " -P, -- use a pattern to verify read data\n"
 367 " -v, -- dump buffer to standard output\n"
 368 " -q, -- quite mode, do not show I/O statistics\n"
 369 "\n");
 370 }
 371
 372 static int
 373 readv_f(int argc, char **argv)
 374 {
 375         struct timeval t1, t2;
 376         int Cflag = 0, qflag = 0, vflag = 0;
 377         int c, cnt;
 378         char *buf, *p;
 379         int64_t offset;
 380         int count = 0, total;
 381         int nr_iov, i;
 382         QEMUIOVector qiov;
 383         int pattern = 0;
 384         int Pflag = 0;
 385
 386         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 387                 switch (c) {
 388                 case 'C':
 389                         Cflag = 1;
 390                         break;
 391                 case 'P':
 392                         Pflag = 1;
 393                         pattern = atoi(optarg);
 394                         break;
 395                 case 'q':
 396                         qflag = 1;
 397                         break;
 398                 case 'v':
 399                         vflag = 1;
 400                         break;
 401                 default:
 402                         return command_usage(&readv_cmd);
 403                 }
 404         }
 405
 406         if (optind > argc - 2)
 407                 return command_usage(&readv_cmd);
 408
 409
 410         offset = cvtnum(argv[optind]);
 411         if (offset < 0) {
 412                 printf("non-numeric length argument -- %s\n", argv[optind]);
 413                 return 0;
 414         }
 415         optind++;
 416
 417         if (offset & 0x1ff) {
 418                 printf("offset %lld is not sector aligned\n",
 419                         (long long)offset);
 420                 return 0;
 421         }
 422
 423         if (count & 0x1ff) {
 424                 printf("count %d is not sector aligned\n",
 425                         count);
 426                 return 0;
 427         }
 428
 429         for (i = optind; i < argc; i++) {
 430                 size_t len;
 431
 432                 len = cvtnum(argv[i]);
 433                 if (len < 0) {
 434                         printf("non-numeric length argument -- %s\n", argv[i]);
 435                         return 0;
 436                 }
 437                 count += len;
 438         }
 439
 440         nr_iov = argc - optind;
 441         qemu_iovec_init(&qiov, nr_iov);
 442         buf = p = qemu_io_alloc(count, 0xab);
 443         for (i = 0; i < nr_iov; i++) {
 444                 size_t len;
 445
 446                 len = cvtnum(argv[optind]);
 447                 if (len < 0) {
 448                         printf("non-numeric length argument -- %s\n",
 449                                 argv[optind]);
 450                         return 0;
 451                 }
 452
 453                 qemu_iovec_add(&qiov, p, len);
 454                 p += len;
 455                 optind++;
 456         }
 457
 458         gettimeofday(&t1, NULL);
 459         cnt = do_aio_readv(&qiov, offset, &total);
 460         gettimeofday(&t2, NULL);
 461
 462         if (cnt < 0) {
 463                 printf("readv failed: %s\n", strerror(-cnt));
 464                 return 0;
 465         }
 466
 467         if (Pflag) {
 468                 void* cmp_buf = malloc(count);
 469                 memset(cmp_buf, pattern, count);
 470                 if (memcmp(buf, cmp_buf, count)) {
 471                         printf("Pattern verification failed at offset %lld, "
 472                                 "%d bytes\n",
 473                                 (long long) offset, count);
 474                 }
 475                 free(cmp_buf);
 476         }
 477
 478         if (qflag)
 479                 return 0;
 480
 481         if (vflag)
 482                 dump_buffer(buf, offset, qiov.size);
 483
 484         /* Finally, report back -- -C gives a parsable format */
 485         t2 = tsub(t2, t1);
 486         print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 487
 488         qemu_io_free(buf);
 489
 490         return 0;
 491 }
 492
 493 static const cmdinfo_t readv_cmd = {
 494         .name           = "readv",
 495         .cfunc          = readv_f,
 496         .argmin         = 2,
 497         .argmax         = -1,
 498         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 499         .oneline        = "reads a number of bytes at a specified offset",
 500         .help           = readv_help,
 501 };
 502
 503 static const cmdinfo_t write_cmd;
 504
 505 static void
 506 write_help(void)
 507 {
 508         printf(
 509 "\n"
 510 " writes a range of bytes from the given offset\n"
 511 "\n"
 512 " Example:\n"
 513 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 514 "\n"
 515 " Writes into a segment of the currently open file, using a buffer\n"
 516 " filled with a set pattern (0xcdcdcdcd).\n"
 517 " -p, -- use bdrv_pwrite to write the file\n"
 518 " -P, -- use different pattern to fill file\n"
 519 " -C, -- report statistics in a machine parsable format\n"
 520 " -q, -- quite mode, do not show I/O statistics\n"
 521 "\n");
 522 }
 523
 524 static int
 525 write_f(int argc, char **argv)
 526 {
 527         struct timeval t1, t2;
 528         int Cflag = 0, pflag = 0, qflag = 0;
 529         int c, cnt;
 530         char *buf;
 531         int64_t offset;
 532         int count;
 533         /* Some compilers get confused and warn if this is not initialized.  */
 534         int total = 0;
 535         int pattern = 0xcd;
 536
 537         while ((c = getopt(argc, argv, "CpP:q")) != EOF) {
 538                 switch (c) {
 539                 case 'C':
 540                         Cflag = 1;
 541                         break;
 542                 case 'p':
 543                         pflag = 1;
 544                         break;
 545                 case 'P':
 546                         pattern = atoi(optarg);
 547                         break;
 548                 case 'q':
 549                         qflag = 1;
 550                         break;
 551                 default:
 552                         return command_usage(&write_cmd);
 553                 }
 554         }
 555
 556         if (optind != argc - 2)
 557                 return command_usage(&write_cmd);
 558
 559         offset = cvtnum(argv[optind]);
 560         if (offset < 0) {
 561                 printf("non-numeric length argument -- %s\n", argv[optind]);
 562                 return 0;
 563         }
 564
 565         optind++;
 566         count = cvtnum(argv[optind]);
 567         if (count < 0) {
 568                 printf("non-numeric length argument -- %s\n", argv[optind]);
 569                 return 0;
 570         }
 571
 572         if (!pflag) {
 573                 if (offset & 0x1ff) {
 574                         printf("offset %lld is not sector aligned\n",
 575                                 (long long)offset);
 576                         return 0;
 577                 }
 578
 579                 if (count & 0x1ff) {
 580                         printf("count %d is not sector aligned\n",
 581                                 count);
 582                         return 0;
 583                 }
 584         }
 585
 586         buf = qemu_io_alloc(count, pattern);
 587
 588         gettimeofday(&t1, NULL);
 589         if (pflag)
 590                 cnt = do_pwrite(buf, offset, count, &total);
 591         else
 592                 cnt = do_write(buf, offset, count, &total);
 593         gettimeofday(&t2, NULL);
 594
 595         if (cnt < 0) {
 596                 printf("write failed: %s\n", strerror(-cnt));
 597                 return 0;
 598         }
 599
 600         if (qflag)
 601                 return 0;
 602
 603         /* Finally, report back -- -C gives a parsable format */
 604         t2 = tsub(t2, t1);
 605         print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 606
 607         qemu_io_free(buf);
 608
 609         return 0;
 610 }
 611
 612 static const cmdinfo_t write_cmd = {
 613         .name           = "write",
 614         .altname        = "w",
 615         .cfunc          = write_f,
 616         .argmin         = 2,
 617         .argmax         = -1,
 618         .args           = "[-aCpq] [-P pattern ] off len",
 619         .oneline        = "writes a number of bytes at a specified offset",
 620         .help           = write_help,
 621 };
 622
 623 static const cmdinfo_t writev_cmd;
 624
 625 static void
 626 writev_help(void)
 627 {
 628         printf(
 629 "\n"
 630 " writes a range of bytes from the given offset source from multiple buffers\n"
 631 "\n"
 632 " Example:\n"
 633 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 634 "\n"
 635 " Writes into a segment of the currently open file, using a buffer\n"
 636 " filled with a set pattern (0xcdcdcdcd).\n"
 637 " -P, -- use different pattern to fill file\n"
 638 " -C, -- report statistics in a machine parsable format\n"
 639 " -q, -- quite mode, do not show I/O statistics\n"
 640 "\n");
 641 }
 642
 643 static int
 644 writev_f(int argc, char **argv)
 645 {
 646         struct timeval t1, t2;
 647         int Cflag = 0, qflag = 0;
 648         int c, cnt;
 649         char *buf, *p;
 650         int64_t offset;
 651         int count = 0, total;
 652         int nr_iov, i;
 653         int pattern = 0xcd;
 654         QEMUIOVector qiov;
 655
 656         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 657                 switch (c) {
 658                 case 'C':
 659                         Cflag = 1;
 660                         break;
 661                 case 'q':
 662                         qflag = 1;
 663                         break;
 664                 case 'P':
 665                         pattern = atoi(optarg);
 666                         break;
 667                 default:
 668                         return command_usage(&writev_cmd);
 669                 }
 670         }
 671
 672         if (optind > argc - 2)
 673                 return command_usage(&writev_cmd);
 674
 675         offset = cvtnum(argv[optind]);
 676         if (offset < 0) {
 677                 printf("non-numeric length argument -- %s\n", argv[optind]);
 678                 return 0;
 679         }
 680         optind++;
 681
 682         if (offset & 0x1ff) {
 683                 printf("offset %lld is not sector aligned\n",
 684                         (long long)offset);
 685                 return 0;
 686         }
 687
 688         if (count & 0x1ff) {
 689                 printf("count %d is not sector aligned\n",
 690                         count);
 691                 return 0;
 692         }
 693
 694
 695         for (i = optind; i < argc; i++) {
 696                 size_t len;
 697
 698                 len = cvtnum(argv[optind]);
 699                 if (len < 0) {
 700                         printf("non-numeric length argument -- %s\n", argv[i]);
 701                         return 0;
 702                 }
 703                 count += len;
 704         }
 705
 706         nr_iov = argc - optind;
 707         qemu_iovec_init(&qiov, nr_iov);
 708         buf = p = qemu_io_alloc(count, pattern);
 709         for (i = 0; i < nr_iov; i++) {
 710                 size_t len;
 711
 712                 len = cvtnum(argv[optind]);
 713                 if (len < 0) {
 714                         printf("non-numeric length argument -- %s\n",
 715                                 argv[optind]);
 716                         return 0;
 717                 }
 718
 719                 qemu_iovec_add(&qiov, p, len);
 720                 p += len;
 721                 optind++;
 722         }
 723
 724         gettimeofday(&t1, NULL);
 725         cnt = do_aio_writev(&qiov, offset, &total);
 726         gettimeofday(&t2, NULL);
 727
 728         if (cnt < 0) {
 729                 printf("writev failed: %s\n", strerror(-cnt));
 730                 return 0;
 731         }
 732
 733         if (qflag)
 734                 return 0;
 735
 736         /* Finally, report back -- -C gives a parsable format */
 737         t2 = tsub(t2, t1);
 738         print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 739
 740         qemu_io_free(buf);
 741
 742         return 0;
 743 }
 744
 745 static const cmdinfo_t writev_cmd = {
 746         .name           = "writev",
 747         .cfunc          = writev_f,
 748         .argmin         = 2,
 749         .argmax         = -1,
 750         .args           = "[-Cq] [-P pattern ] off len [len..]",
 751         .oneline        = "writes a number of bytes at a specified offset",
 752         .help           = writev_help,
 753 };
 754
 755 static int
 756 flush_f(int argc, char **argv)
 757 {
 758         bdrv_flush(bs);
 759         return 0;
 760 }
 761
 762 static const cmdinfo_t flush_cmd = {
 763         .name           = "flush",
 764         .altname        = "f",
 765         .cfunc          = flush_f,
 766         .oneline        = "flush all in-core file state to disk",
 767 };
 768
 769 static int
 770 truncate_f(int argc, char **argv)
 771 {
 772         int64_t offset;
 773         int ret;
 774
 775         offset = cvtnum(argv[1]);
 776         if (offset < 0) {
 777                 printf("non-numeric truncate argument -- %s\n", argv[1]);
 778                 return 0;
 779         }
 780
 781         ret = bdrv_truncate(bs, offset);
 782         if (ret < 0) {
 783                 printf("truncate: %s", strerror(ret));
 784                 return 0;
 785         }
 786
 787         return 0;
 788 }
 789
 790 static const cmdinfo_t truncate_cmd = {
 791         .name           = "truncate",
 792         .altname        = "t",
 793         .cfunc          = truncate_f,
 794         .argmin         = 1,
 795         .argmax         = 1,
 796         .args           = "off",
 797         .oneline        = "truncates the current file at the given offset",
 798 };
 799
 800 static int
 801 length_f(int argc, char **argv)
 802 {
 803         int64_t size;
 804         char s1[64];
 805
 806         size = bdrv_getlength(bs);
 807         if (size < 0) {
 808                 printf("getlength: %s", strerror(size));
 809                 return 0;
 810         }
 811
 812         cvtstr(size, s1, sizeof(s1));
 813         printf("%s\n", s1);
 814         return 0;
 815 }
 816
 817
 818 static const cmdinfo_t length_cmd = {
 819         .name           = "length",
 820         .altname        = "l",
 821         .cfunc          = length_f,
 822         .oneline        = "gets the length of the current file",
 823 };
 824
 825
 826 static int
 827 info_f(int argc, char **argv)
 828 {
 829         BlockDriverInfo bdi;
 830         char s1[64], s2[64];
 831         int ret;
 832
 833         if (bs->drv && bs->drv->format_name)
 834                 printf("format name: %s\n", bs->drv->format_name);
 835         if (bs->drv && bs->drv->protocol_name)
 836                 printf("format name: %s\n", bs->drv->protocol_name);
 837
 838         ret = bdrv_get_info(bs, &bdi);
 839         if (ret)
 840                 return 0;
 841
 842         cvtstr(bdi.cluster_size, s1, sizeof(s1));
 843         cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
 844
 845         printf("cluster size: %s\n", s1);
 846         printf("vm state offset: %s\n", s2);
 847
 848         return 0;
 849 }
 850
 851
 852
 853 static const cmdinfo_t info_cmd = {
 854         .name           = "info",
 855         .altname        = "i",
 856         .cfunc          = info_f,
 857         .oneline        = "prints information about the current file",
 858 };
 859
 860 static int
 861 alloc_f(int argc, char **argv)
 862 {
 863         int64_t offset;
 864         int nb_sectors;
 865         char s1[64];
 866         int num;
 867         int ret;
 868         const char *retstr;
 869
 870         offset = cvtnum(argv[1]);
 871         if (offset & 0x1ff) {
 872                 printf("offset %lld is not sector aligned\n",
 873                         (long long)offset);
 874                 return 0;
 875         }
 876
 877         if (argc == 3)
 878                 nb_sectors = cvtnum(argv[2]);
 879         else
 880                 nb_sectors = 1;
 881
 882         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
 883
 884         cvtstr(offset, s1, sizeof(s1));
 885
 886         retstr = ret ? "allocated" : "not allocated";
 887         if (nb_sectors == 1)
 888                 printf("sector %s at offset %s\n", retstr, s1);
 889         else
 890                 printf("%d/%d sectors %s at offset %s\n",
 891                         num, nb_sectors, retstr, s1);
 892         return 0;
 893 }
 894
 895 static const cmdinfo_t alloc_cmd = {
 896         .name           = "alloc",
 897         .altname        = "a",
 898         .argmin         = 1,
 899         .argmax         = 2,
 900         .cfunc          = alloc_f,
 901         .args           = "off [sectors]",
 902         .oneline        = "checks if a sector is present in the file",
 903 };
 904
 905 static int
 906 close_f(int argc, char **argv)
 907 {
 908         bdrv_close(bs);
 909         bs = NULL;
 910         return 0;
 911 }
 912
 913 static const cmdinfo_t close_cmd = {
 914         .name           = "close",
 915         .altname        = "c",
 916         .cfunc          = close_f,
 917         .oneline        = "close the current open file",
 918 };
 919
 920 static int openfile(char *name, int flags)
 921 {
 922         if (bs) {
 923                 fprintf(stderr, "file open already, try 'help close'\n");
 924                 return 1;
 925         }
 926
 927         bs = bdrv_new("hda");
 928         if (!bs)
 929                 return 1;
 930
 931         if (bdrv_open(bs, name, flags) == -1) {
 932                 fprintf(stderr, "%s: can't open device %s\n", progname, name);
 933                 bs = NULL;
 934                 return 1;
 935         }
 936
 937         return 0;
 938 }
 939
 940 static void
 941 open_help(void)
 942 {
 943         printf(
 944 "\n"
 945 " opens a new file in the requested mode\n"
 946 "\n"
 947 " Example:\n"
 948 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
 949 "\n"
 950 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
 951 " -C, -- create new file if it doesn't exist\n"
 952 " -r, -- open file read-only\n"
 953 " -s, -- use snapshot file\n"
 954 " -n, -- disable host cache\n"
 955 "\n");
 956 }
 957
 958 static const cmdinfo_t open_cmd;
 959
 960 static int
 961 open_f(int argc, char **argv)
 962 {
 963         int flags = 0;
 964         int readonly = 0;
 965         int c;
 966
 967         while ((c = getopt(argc, argv, "snCr")) != EOF) {
 968                 switch (c) {
 969                 case 's':
 970                         flags |= BDRV_O_SNAPSHOT;
 971                         break;
 972                 case 'n':
 973                         flags |= BDRV_O_NOCACHE;
 974                         break;
 975                 case 'C':
 976                         flags |= BDRV_O_CREAT;
 977                         break;
 978                 case 'r':
 979                         readonly = 1;
 980                         break;
 981                 default:
 982                         return command_usage(&open_cmd);
 983                 }
 984         }
 985
 986         if (readonly)
 987                 flags |= BDRV_O_RDONLY;
 988         else
 989                 flags |= BDRV_O_RDWR;
 990
 991         if (optind != argc - 1)
 992                 return command_usage(&open_cmd);
 993
 994         return openfile(argv[optind], flags);
 995 }
 996
 997 static const cmdinfo_t open_cmd = {
 998         .name           = "open",
 999         .altname        = "o",
1000         .cfunc          = open_f,
1001         .argmin         = 1,
1002         .argmax         = -1,
1003         .flags          = CMD_NOFILE_OK,
1004         .args           = "[-Crsn] [path]",
1005         .oneline        = "open the file specified by path",
1006         .help           = open_help,
1007 };
1008
1009 static int
1010 init_args_command(
1011         int     index)
1012 {
1013         /* only one device allowed so far */
1014         if (index >= 1)
1015                 return 0;
1016         return ++index;
1017 }
1018
1019 static int
1020 init_check_command(
1021         const cmdinfo_t *ct)
1022 {
1023         if (ct->flags & CMD_FLAG_GLOBAL)
1024                 return 1;
1025         if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1026                 fprintf(stderr, "no file open, try 'help open'\n");
1027                 return 0;
1028         }
1029         return 1;
1030 }
1031
1032 static void usage(const char *name)
1033 {
1034         printf(
1035 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
1036 "QEMU Disk excerciser\n"
1037 "\n"
1038 "  -C, --create         create new file if it doesn't exist\n"
1039 "  -c, --cmd            command to execute\n"
1040 "  -r, --read-only      export read-only\n"
1041 "  -s, --snapshot       use snapshot file\n"
1042 "  -n, --nocache        disable host cache\n"
1043 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1044 "  -h, --help           display this help and exit\n"
1045 "  -V, --version        output version information and exit\n"
1046 "\n",
1047         name);
1048 }
1049
1050
1051 int main(int argc, char **argv)
1052 {
1053         int readonly = 0;
1054         const char *sopt = "hVc:Crsnm";
1055         struct option lopt[] = {
1056                 { "help", 0, 0, 'h' },
1057                 { "version", 0, 0, 'V' },
1058                 { "offset", 1, 0, 'o' },
1059                 { "cmd", 1, 0, 'c' },
1060                 { "create", 0, 0, 'C' },
1061                 { "read-only", 0, 0, 'r' },
1062                 { "snapshot", 0, 0, 's' },
1063                 { "nocache", 0, 0, 'n' },
1064                 { "misalign", 0, 0, 'm' },
1065                 { NULL, 0, 0, 0 }
1066         };
1067         int c;
1068         int opt_index = 0;
1069         int flags = 0;
1070
1071         progname = basename(argv[0]);
1072
1073         while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1074                 switch (c) {
1075                 case 's':
1076                         flags |= BDRV_O_SNAPSHOT;
1077                         break;
1078                 case 'n':
1079                         flags |= BDRV_O_NOCACHE;
1080                         break;
1081                 case 'c':
1082                         add_user_command(optarg);
1083                         break;
1084                 case 'C':
1085                         flags |= BDRV_O_CREAT;
1086                         break;
1087                 case 'r':
1088                         readonly = 1;
1089                         break;
1090                 case 'm':
1091                         misalign = 1;
1092                         break;
1093                 case 'V':
1094                         printf("%s version %s\n", progname, VERSION);
1095                         exit(0);
1096                 case 'h':
1097                         usage(progname);
1098                         exit(0);
1099                 default:
1100                         usage(progname);
1101                         exit(1);
1102                 }
1103         }
1104
1105         if ((argc - optind) > 1) {
1106                 usage(progname);
1107                 exit(1);
1108         }
1109
1110         bdrv_init();
1111
1112         /* initialize commands */
1113         quit_init();
1114         help_init();
1115         add_command(&open_cmd);
1116         add_command(&close_cmd);
1117         add_command(&read_cmd);
1118         add_command(&readv_cmd);
1119         add_command(&write_cmd);
1120         add_command(&writev_cmd);
1121         add_command(&flush_cmd);
1122         add_command(&truncate_cmd);
1123         add_command(&length_cmd);
1124         add_command(&info_cmd);
1125         add_command(&alloc_cmd);
1126
1127         add_args_command(init_args_command);
1128         add_check_command(init_check_command);
1129
1130         /* open the device */
1131         if (readonly)
1132                 flags |= BDRV_O_RDONLY;
1133         else
1134                 flags |= BDRV_O_RDWR;
1135
1136         if ((argc - optind) == 1)
1137                 openfile(argv[optind], flags);
1138         command_loop();
1139
1140         if (bs)
1141                 bdrv_close(bs);
1142         return 0;
1143 }