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(const void *buffer, int64_t offset, int len)
  58 {
  59         int i, j;
  60         const uint8_t *p;
  61
  62         for (i = 0, p = buffer; i < len; i += 16) {
  63                 const uint8_t *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(*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 /*
 102  * Parse multiple length statements for vectored I/O, and construct an I/O
 103  * vector matching it.
 104  */
 105 static void *
 106 create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
 107 {
 108         size_t *sizes = calloc(nr_iov, sizeof(size_t));
 109         size_t count = 0;
 110         void *buf, *p;
 111         int i;
 112
 113         for (i = 0; i < nr_iov; i++) {
 114                 char *arg = argv[i];
 115                 long long len;
 116
 117                 len = cvtnum(arg);
 118                 if (len < 0) {
 119                         printf("non-numeric length argument -- %s\n", arg);
 120                         return NULL;
 121                 }
 122
 123                 /* should be SIZE_T_MAX, but that doesn't exist */
 124                 if (len > UINT_MAX) {
 125                         printf("too large length argument -- %s\n", arg);
 126                         return NULL;
 127                 }
 128
 129                 if (len & 0x1ff) {
 130                         printf("length argument %lld is not sector aligned\n",
 131                                 len);
 132                         return NULL;
 133                 }
 134
 135                 sizes[i] = len;
 136                 count += len;
 137         }
 138
 139         qemu_iovec_init(qiov, nr_iov);
 140
 141         buf = p = qemu_io_alloc(count, pattern);
 142
 143         for (i = 0; i < nr_iov; i++) {
 144                 qemu_iovec_add(qiov, p, sizes[i]);
 145                 p += sizes[i];
 146         }
 147
 148         free(sizes);
 149         return buf;
 150 }
 151
 152 static int do_read(char *buf, int64_t offset, int count, int *total)
 153 {
 154         int ret;
 155
 156         ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 157         if (ret < 0)
 158                 return ret;
 159         *total = count;
 160         return 1;
 161 }
 162
 163 static int do_write(char *buf, int64_t offset, int count, int *total)
 164 {
 165         int ret;
 166
 167         ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 168         if (ret < 0)
 169                 return ret;
 170         *total = count;
 171         return 1;
 172 }
 173
 174 static int do_pread(char *buf, int64_t offset, int count, int *total)
 175 {
 176         *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
 177         if (*total < 0)
 178                 return *total;
 179         return 1;
 180 }
 181
 182 static int do_pwrite(char *buf, int64_t offset, int count, int *total)
 183 {
 184         *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
 185         if (*total < 0)
 186                 return *total;
 187         return 1;
 188 }
 189
 190 #define NOT_DONE 0x7fffffff
 191 static void aio_rw_done(void *opaque, int ret)
 192 {
 193         *(int *)opaque = ret;
 194 }
 195
 196 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
 197 {
 198         BlockDriverAIOCB *acb;
 199         int async_ret = NOT_DONE;
 200
 201         acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
 202                              aio_rw_done, &async_ret);
 203         if (!acb)
 204                 return -EIO;
 205
 206         while (async_ret == NOT_DONE)
 207                 qemu_aio_wait();
 208
 209         *total = qiov->size;
 210         return async_ret < 0 ? async_ret : 1;
 211 }
 212
 213 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
 214 {
 215         BlockDriverAIOCB *acb;
 216         int async_ret = NOT_DONE;
 217
 218         acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
 219                               aio_rw_done, &async_ret);
 220         if (!acb)
 221                 return -EIO;
 222
 223         while (async_ret == NOT_DONE)
 224                 qemu_aio_wait();
 225
 226         *total = qiov->size;
 227         return async_ret < 0 ? async_ret : 1;
 228 }
 229
 230
 231 static const cmdinfo_t read_cmd;
 232
 233 static void
 234 read_help(void)
 235 {
 236         printf(
 237 "\n"
 238 " reads a range of bytes from the given offset\n"
 239 "\n"
 240 " Example:\n"
 241 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
 242 "\n"
 243 " Reads a segment of the currently open file, optionally dumping it to the\n"
 244 " standard output stream (with -v option) for subsequent inspection.\n"
 245 " -C, -- report statistics in a machine parsable format\n"
 246 " -l, -- length for pattern verification (only with -P)\n"
 247 " -p, -- use bdrv_pread to read the file\n"
 248 " -P, -- use a pattern to verify read data\n"
 249 " -q, -- quite mode, do not show I/O statistics\n"
 250 " -s, -- start offset for pattern verification (only with -P)\n"
 251 " -v, -- dump buffer to standard output\n"
 252 "\n");
 253 }
 254
 255 static int
 256 read_f(int argc, char **argv)
 257 {
 258         struct timeval t1, t2;
 259         int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 260         int Pflag = 0, sflag = 0, lflag = 0;
 261         int c, cnt;
 262         char *buf;
 263         int64_t offset;
 264         int count;
 265         /* Some compilers get confused and warn if this is not initialized.  */
 266         int total = 0;
 267         int pattern = 0, pattern_offset = 0, pattern_count = 0;
 268
 269         while ((c = getopt(argc, argv, "Cl:pP:qs:v")) != EOF) {
 270                 switch (c) {
 271                 case 'C':
 272                         Cflag = 1;
 273                         break;
 274                 case 'l':
 275                         lflag = 1;
 276                         pattern_count = cvtnum(optarg);
 277                         if (pattern_count < 0) {
 278                                 printf("non-numeric length argument -- %s\n", optarg);
 279                                 return 0;
 280                         }
 281                         break;
 282                 case 'p':
 283                         pflag = 1;
 284                         break;
 285                 case 'P':
 286                         Pflag = 1;
 287                         pattern = atoi(optarg);
 288                         break;
 289                 case 'q':
 290                         qflag = 1;
 291                         break;
 292                 case 's':
 293                         sflag = 1;
 294                         pattern_offset = cvtnum(optarg);
 295                         if (pattern_offset < 0) {
 296                                 printf("non-numeric length argument -- %s\n", optarg);
 297                                 return 0;
 298                         }
 299                         break;
 300                 case 'v':
 301                         vflag = 1;
 302                         break;
 303                 default:
 304                         return command_usage(&read_cmd);
 305                 }
 306         }
 307
 308         if (optind != argc - 2)
 309                 return command_usage(&read_cmd);
 310
 311         offset = cvtnum(argv[optind]);
 312         if (offset < 0) {
 313                 printf("non-numeric length argument -- %s\n", argv[optind]);
 314                 return 0;
 315         }
 316
 317         optind++;
 318         count = cvtnum(argv[optind]);
 319         if (count < 0) {
 320                 printf("non-numeric length argument -- %s\n", argv[optind]);
 321                 return 0;
 322         }
 323
 324     if (!Pflag && (lflag || sflag)) {
 325         return command_usage(&read_cmd);
 326     }
 327
 328     if (!lflag) {
 329         pattern_count = count - pattern_offset;
 330     }
 331
 332     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 333         printf("pattern verfication range exceeds end of read data\n");
 334         return 0;
 335     }
 336
 337         if (!pflag)
 338                 if (offset & 0x1ff) {
 339                         printf("offset %lld is not sector aligned\n",
 340                                 (long long)offset);
 341                         return 0;
 342
 343                 if (count & 0x1ff) {
 344                         printf("count %d is not sector aligned\n",
 345                                 count);
 346                         return 0;
 347                 }
 348         }
 349
 350         buf = qemu_io_alloc(count, 0xab);
 351
 352         gettimeofday(&t1, NULL);
 353         if (pflag)
 354                 cnt = do_pread(buf, offset, count, &total);
 355         else
 356                 cnt = do_read(buf, offset, count, &total);
 357         gettimeofday(&t2, NULL);
 358
 359         if (cnt < 0) {
 360                 printf("read failed: %s\n", strerror(-cnt));
 361                 return 0;
 362         }
 363
 364         if (Pflag) {
 365                 void* cmp_buf = malloc(pattern_count);
 366                 memset(cmp_buf, pattern, pattern_count);
 367                 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 368                         printf("Pattern verification failed at offset %lld, "
 369                                 "%d bytes\n",
 370                                 (long long) offset + pattern_offset, pattern_count);
 371                 }
 372                 free(cmp_buf);
 373         }
 374
 375         if (qflag)
 376                 return 0;
 377
 378         if (vflag)
 379                 dump_buffer(buf, offset, count);
 380
 381         /* Finally, report back -- -C gives a parsable format */
 382         t2 = tsub(t2, t1);
 383         print_report("read", &t2, offset, count, total, cnt, Cflag);
 384
 385         qemu_io_free(buf);
 386
 387         return 0;
 388 }
 389
 390 static const cmdinfo_t read_cmd = {
 391         .name           = "read",
 392         .altname        = "r",
 393         .cfunc          = read_f,
 394         .argmin         = 2,
 395         .argmax         = -1,
 396         .args           = "[-aCpqv] [-P pattern [-s off] [-l len]] off len",
 397         .oneline        = "reads a number of bytes at a specified offset",
 398         .help           = read_help,
 399 };
 400
 401 static const cmdinfo_t readv_cmd;
 402
 403 static void
 404 readv_help(void)
 405 {
 406         printf(
 407 "\n"
 408 " reads a range of bytes from the given offset into multiple buffers\n"
 409 "\n"
 410 " Example:\n"
 411 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 412 "\n"
 413 " Reads a segment of the currently open file, optionally dumping it to the\n"
 414 " standard output stream (with -v option) for subsequent inspection.\n"
 415 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 416 " -C, -- report statistics in a machine parsable format\n"
 417 " -P, -- use a pattern to verify read data\n"
 418 " -v, -- dump buffer to standard output\n"
 419 " -q, -- quite mode, do not show I/O statistics\n"
 420 "\n");
 421 }
 422
 423 static int
 424 readv_f(int argc, char **argv)
 425 {
 426         struct timeval t1, t2;
 427         int Cflag = 0, qflag = 0, vflag = 0;
 428         int c, cnt;
 429         char *buf;
 430         int64_t offset;
 431         int total;
 432         int nr_iov;
 433         QEMUIOVector qiov;
 434         int pattern = 0;
 435         int Pflag = 0;
 436
 437         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 438                 switch (c) {
 439                 case 'C':
 440                         Cflag = 1;
 441                         break;
 442                 case 'P':
 443                         Pflag = 1;
 444                         pattern = atoi(optarg);
 445                         break;
 446                 case 'q':
 447                         qflag = 1;
 448                         break;
 449                 case 'v':
 450                         vflag = 1;
 451                         break;
 452                 default:
 453                         return command_usage(&readv_cmd);
 454                 }
 455         }
 456
 457         if (optind > argc - 2)
 458                 return command_usage(&readv_cmd);
 459
 460
 461         offset = cvtnum(argv[optind]);
 462         if (offset < 0) {
 463                 printf("non-numeric length argument -- %s\n", argv[optind]);
 464                 return 0;
 465         }
 466         optind++;
 467
 468         if (offset & 0x1ff) {
 469                 printf("offset %lld is not sector aligned\n",
 470                         (long long)offset);
 471                 return 0;
 472         }
 473
 474         nr_iov = argc - optind;
 475         buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
 476
 477         gettimeofday(&t1, NULL);
 478         cnt = do_aio_readv(&qiov, offset, &total);
 479         gettimeofday(&t2, NULL);
 480
 481         if (cnt < 0) {
 482                 printf("readv failed: %s\n", strerror(-cnt));
 483                 return 0;
 484         }
 485
 486         if (Pflag) {
 487                 void* cmp_buf = malloc(qiov.size);
 488                 memset(cmp_buf, pattern, qiov.size);
 489                 if (memcmp(buf, cmp_buf, qiov.size)) {
 490                         printf("Pattern verification failed at offset %lld, "
 491                                 "%zd bytes\n",
 492                                 (long long) offset, qiov.size);
 493                 }
 494                 free(cmp_buf);
 495         }
 496
 497         if (qflag)
 498                 return 0;
 499
 500         if (vflag)
 501                 dump_buffer(buf, offset, qiov.size);
 502
 503         /* Finally, report back -- -C gives a parsable format */
 504         t2 = tsub(t2, t1);
 505         print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 506
 507         qemu_io_free(buf);
 508
 509         return 0;
 510 }
 511
 512 static const cmdinfo_t readv_cmd = {
 513         .name           = "readv",
 514         .cfunc          = readv_f,
 515         .argmin         = 2,
 516         .argmax         = -1,
 517         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 518         .oneline        = "reads a number of bytes at a specified offset",
 519         .help           = readv_help,
 520 };
 521
 522 static const cmdinfo_t write_cmd;
 523
 524 static void
 525 write_help(void)
 526 {
 527         printf(
 528 "\n"
 529 " writes a range of bytes from the given offset\n"
 530 "\n"
 531 " Example:\n"
 532 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 533 "\n"
 534 " Writes into a segment of the currently open file, using a buffer\n"
 535 " filled with a set pattern (0xcdcdcdcd).\n"
 536 " -p, -- use bdrv_pwrite to write the file\n"
 537 " -P, -- use different pattern to fill file\n"
 538 " -C, -- report statistics in a machine parsable format\n"
 539 " -q, -- quite mode, do not show I/O statistics\n"
 540 "\n");
 541 }
 542
 543 static int
 544 write_f(int argc, char **argv)
 545 {
 546         struct timeval t1, t2;
 547         int Cflag = 0, pflag = 0, qflag = 0;
 548         int c, cnt;
 549         char *buf;
 550         int64_t offset;
 551         int count;
 552         /* Some compilers get confused and warn if this is not initialized.  */
 553         int total = 0;
 554         int pattern = 0xcd;
 555
 556         while ((c = getopt(argc, argv, "CpP:q")) != EOF) {
 557                 switch (c) {
 558                 case 'C':
 559                         Cflag = 1;
 560                         break;
 561                 case 'p':
 562                         pflag = 1;
 563                         break;
 564                 case 'P':
 565                         pattern = atoi(optarg);
 566                         break;
 567                 case 'q':
 568                         qflag = 1;
 569                         break;
 570                 default:
 571                         return command_usage(&write_cmd);
 572                 }
 573         }
 574
 575         if (optind != argc - 2)
 576                 return command_usage(&write_cmd);
 577
 578         offset = cvtnum(argv[optind]);
 579         if (offset < 0) {
 580                 printf("non-numeric length argument -- %s\n", argv[optind]);
 581                 return 0;
 582         }
 583
 584         optind++;
 585         count = cvtnum(argv[optind]);
 586         if (count < 0) {
 587                 printf("non-numeric length argument -- %s\n", argv[optind]);
 588                 return 0;
 589         }
 590
 591         if (!pflag) {
 592                 if (offset & 0x1ff) {
 593                         printf("offset %lld is not sector aligned\n",
 594                                 (long long)offset);
 595                         return 0;
 596                 }
 597
 598                 if (count & 0x1ff) {
 599                         printf("count %d is not sector aligned\n",
 600                                 count);
 601                         return 0;
 602                 }
 603         }
 604
 605         buf = qemu_io_alloc(count, pattern);
 606
 607         gettimeofday(&t1, NULL);
 608         if (pflag)
 609                 cnt = do_pwrite(buf, offset, count, &total);
 610         else
 611                 cnt = do_write(buf, offset, count, &total);
 612         gettimeofday(&t2, NULL);
 613
 614         if (cnt < 0) {
 615                 printf("write failed: %s\n", strerror(-cnt));
 616                 return 0;
 617         }
 618
 619         if (qflag)
 620                 return 0;
 621
 622         /* Finally, report back -- -C gives a parsable format */
 623         t2 = tsub(t2, t1);
 624         print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 625
 626         qemu_io_free(buf);
 627
 628         return 0;
 629 }
 630
 631 static const cmdinfo_t write_cmd = {
 632         .name           = "write",
 633         .altname        = "w",
 634         .cfunc          = write_f,
 635         .argmin         = 2,
 636         .argmax         = -1,
 637         .args           = "[-aCpq] [-P pattern ] off len",
 638         .oneline        = "writes a number of bytes at a specified offset",
 639         .help           = write_help,
 640 };
 641
 642 static const cmdinfo_t writev_cmd;
 643
 644 static void
 645 writev_help(void)
 646 {
 647         printf(
 648 "\n"
 649 " writes a range of bytes from the given offset source from multiple buffers\n"
 650 "\n"
 651 " Example:\n"
 652 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 653 "\n"
 654 " Writes into a segment of the currently open file, using a buffer\n"
 655 " filled with a set pattern (0xcdcdcdcd).\n"
 656 " -P, -- use different pattern to fill file\n"
 657 " -C, -- report statistics in a machine parsable format\n"
 658 " -q, -- quite mode, do not show I/O statistics\n"
 659 "\n");
 660 }
 661
 662 static int
 663 writev_f(int argc, char **argv)
 664 {
 665         struct timeval t1, t2;
 666         int Cflag = 0, qflag = 0;
 667         int c, cnt;
 668         char *buf;
 669         int64_t offset;
 670         int total;
 671         int nr_iov;
 672         int pattern = 0xcd;
 673         QEMUIOVector qiov;
 674
 675         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 676                 switch (c) {
 677                 case 'C':
 678                         Cflag = 1;
 679                         break;
 680                 case 'q':
 681                         qflag = 1;
 682                         break;
 683                 case 'P':
 684                         pattern = atoi(optarg);
 685                         break;
 686                 default:
 687                         return command_usage(&writev_cmd);
 688                 }
 689         }
 690
 691         if (optind > argc - 2)
 692                 return command_usage(&writev_cmd);
 693
 694         offset = cvtnum(argv[optind]);
 695         if (offset < 0) {
 696                 printf("non-numeric length argument -- %s\n", argv[optind]);
 697                 return 0;
 698         }
 699         optind++;
 700
 701         if (offset & 0x1ff) {
 702                 printf("offset %lld is not sector aligned\n",
 703                         (long long)offset);
 704                 return 0;
 705         }
 706
 707         nr_iov = argc - optind;
 708         buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
 709
 710         gettimeofday(&t1, NULL);
 711         cnt = do_aio_writev(&qiov, offset, &total);
 712         gettimeofday(&t2, NULL);
 713
 714         if (cnt < 0) {
 715                 printf("writev failed: %s\n", strerror(-cnt));
 716                 return 0;
 717         }
 718
 719         if (qflag)
 720                 return 0;
 721
 722         /* Finally, report back -- -C gives a parsable format */
 723         t2 = tsub(t2, t1);
 724         print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 725
 726         qemu_io_free(buf);
 727
 728         return 0;
 729 }
 730
 731 static const cmdinfo_t writev_cmd = {
 732         .name           = "writev",
 733         .cfunc          = writev_f,
 734         .argmin         = 2,
 735         .argmax         = -1,
 736         .args           = "[-Cq] [-P pattern ] off len [len..]",
 737         .oneline        = "writes a number of bytes at a specified offset",
 738         .help           = writev_help,
 739 };
 740
 741 struct aio_ctx {
 742         QEMUIOVector qiov;
 743         int64_t offset;
 744         char *buf;
 745         int qflag;
 746         int vflag;
 747         int Cflag;
 748         int Pflag;
 749         int pattern;
 750         struct timeval t1;
 751 };
 752
 753 static void
 754 aio_write_done(void *opaque, int ret)
 755 {
 756         struct aio_ctx *ctx = opaque;
 757         struct timeval t2;
 758
 759         gettimeofday(&t2, NULL);
 760
 761
 762         if (ret < 0) {
 763                 printf("aio_write failed: %s\n", strerror(-ret));
 764                 return;
 765         }
 766
 767         if (ctx->qflag) {
 768                 return;
 769         }
 770
 771         /* Finally, report back -- -C gives a parsable format */
 772         t2 = tsub(t2, ctx->t1);
 773         print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
 774                      ctx->qiov.size, 1, ctx->Cflag);
 775
 776         qemu_io_free(ctx->buf);
 777         free(ctx);
 778 }
 779
 780 static const cmdinfo_t aio_read_cmd;
 781
 782 static void
 783 aio_read_done(void *opaque, int ret)
 784 {
 785         struct aio_ctx *ctx = opaque;
 786         struct timeval t2;
 787
 788         gettimeofday(&t2, NULL);
 789
 790         if (ret < 0) {
 791                 printf("readv failed: %s\n", strerror(-ret));
 792                 return;
 793         }
 794
 795         if (ctx->Pflag) {
 796                 void *cmp_buf = malloc(ctx->qiov.size);
 797
 798                 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
 799                 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
 800                         printf("Pattern verification failed at offset %lld, "
 801                                 "%zd bytes\n",
 802                                 (long long) ctx->offset, ctx->qiov.size);
 803                 }
 804                 free(cmp_buf);
 805         }
 806
 807         if (ctx->qflag) {
 808                 return;
 809         }
 810
 811         if (ctx->vflag) {
 812                 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
 813         }
 814
 815         /* Finally, report back -- -C gives a parsable format */
 816         t2 = tsub(t2, ctx->t1);
 817         print_report("read", &t2, ctx->offset, ctx->qiov.size,
 818                      ctx->qiov.size, 1, ctx->Cflag);
 819
 820         qemu_io_free(ctx->buf);
 821         free(ctx);
 822 }
 823
 824 static void
 825 aio_read_help(void)
 826 {
 827         printf(
 828 "\n"
 829 " asynchronously reads a range of bytes from the given offset\n"
 830 "\n"
 831 " Example:\n"
 832 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 833 "\n"
 834 " Reads a segment of the currently open file, optionally dumping it to the\n"
 835 " standard output stream (with -v option) for subsequent inspection.\n"
 836 " The read is performed asynchronously and should the aio_flush command \n"
 837 " should be used to ensure all outstanding aio requests have been completed\n"
 838 " -C, -- report statistics in a machine parsable format\n"
 839 " -P, -- use a pattern to verify read data\n"
 840 " -v, -- dump buffer to standard output\n"
 841 " -q, -- quite mode, do not show I/O statistics\n"
 842 "\n");
 843 }
 844
 845 static int
 846 aio_read_f(int argc, char **argv)
 847 {
 848         int nr_iov, c;
 849         struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 850         BlockDriverAIOCB *acb;
 851
 852         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 853                 switch (c) {
 854                 case 'C':
 855                         ctx->Cflag = 1;
 856                         break;
 857                 case 'P':
 858                         ctx->Pflag = 1;
 859                         ctx->pattern = atoi(optarg);
 860                         break;
 861                 case 'q':
 862                         ctx->qflag = 1;
 863                         break;
 864                 case 'v':
 865                         ctx->vflag = 1;
 866                         break;
 867                 default:
 868                         return command_usage(&aio_read_cmd);
 869                 }
 870         }
 871
 872         if (optind > argc - 2)
 873                 return command_usage(&aio_read_cmd);
 874
 875
 876         ctx->offset = cvtnum(argv[optind]);
 877         if (ctx->offset < 0) {
 878                 printf("non-numeric length argument -- %s\n", argv[optind]);
 879                 return 0;
 880         }
 881         optind++;
 882
 883         if (ctx->offset & 0x1ff) {
 884                 printf("offset %lld is not sector aligned\n",
 885                         (long long)ctx->offset);
 886                 return 0;
 887         }
 888
 889         nr_iov = argc - optind;
 890         ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
 891
 892         gettimeofday(&ctx->t1, NULL);
 893         acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
 894                               ctx->qiov.size >> 9, aio_read_done, ctx);
 895         if (!acb)
 896                 return -EIO;
 897
 898         return 0;
 899 }
 900
 901 static const cmdinfo_t aio_read_cmd = {
 902         .name           = "aio_read",
 903         .cfunc          = aio_read_f,
 904         .argmin         = 2,
 905         .argmax         = -1,
 906         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 907         .oneline        = "asynchronously reads a number of bytes",
 908         .help           = aio_read_help,
 909 };
 910
 911 static const cmdinfo_t aio_write_cmd;
 912
 913 static void
 914 aio_write_help(void)
 915 {
 916         printf(
 917 "\n"
 918 " asynchronously writes a range of bytes from the given offset source \n"
 919 " from multiple buffers\n"
 920 "\n"
 921 " Example:\n"
 922 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 923 "\n"
 924 " Writes into a segment of the currently open file, using a buffer\n"
 925 " filled with a set pattern (0xcdcdcdcd).\n"
 926 " The write is performed asynchronously and should the aio_flush command \n"
 927 " should be used to ensure all outstanding aio requests have been completed\n"
 928 " -P, -- use different pattern to fill file\n"
 929 " -C, -- report statistics in a machine parsable format\n"
 930 " -q, -- quite mode, do not show I/O statistics\n"
 931 "\n");
 932 }
 933
 934
 935 static int
 936 aio_write_f(int argc, char **argv)
 937 {
 938         int nr_iov, c;
 939         int pattern = 0xcd;
 940         struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 941         BlockDriverAIOCB *acb;
 942
 943         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 944                 switch (c) {
 945                 case 'C':
 946                         ctx->Cflag = 1;
 947                         break;
 948                 case 'q':
 949                         ctx->qflag = 1;
 950                         break;
 951                 case 'P':
 952                         pattern = atoi(optarg);
 953                         break;
 954                 default:
 955                         return command_usage(&aio_write_cmd);
 956                 }
 957         }
 958
 959         if (optind > argc - 2)
 960                 return command_usage(&aio_write_cmd);
 961
 962         ctx->offset = cvtnum(argv[optind]);
 963         if (ctx->offset < 0) {
 964                 printf("non-numeric length argument -- %s\n", argv[optind]);
 965                 return 0;
 966         }
 967         optind++;
 968
 969         if (ctx->offset & 0x1ff) {
 970                 printf("offset %lld is not sector aligned\n",
 971                         (long long)ctx->offset);
 972                 return 0;
 973         }
 974
 975         nr_iov = argc - optind;
 976         ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
 977
 978         gettimeofday(&ctx->t1, NULL);
 979         acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
 980                               ctx->qiov.size >> 9, aio_write_done, ctx);
 981         if (!acb)
 982                 return -EIO;
 983
 984         return 0;
 985 }
 986
 987 static const cmdinfo_t aio_write_cmd = {
 988         .name           = "aio_write",
 989         .cfunc          = aio_write_f,
 990         .argmin         = 2,
 991         .argmax         = -1,
 992         .args           = "[-Cq] [-P pattern ] off len [len..]",
 993         .oneline        = "asynchronously writes a number of bytes",
 994         .help           = aio_write_help,
 995 };
 996
 997 static int
 998 aio_flush_f(int argc, char **argv)
 999 {
1000         qemu_aio_flush();
1001         return 0;
1002 }
1003
1004 static const cmdinfo_t aio_flush_cmd = {
1005         .name           = "aio_flush",
1006         .cfunc          = aio_flush_f,
1007         .oneline        = "completes all outstanding aio requets"
1008 };
1009
1010 static int
1011 flush_f(int argc, char **argv)
1012 {
1013         bdrv_flush(bs);
1014         return 0;
1015 }
1016
1017 static const cmdinfo_t flush_cmd = {
1018         .name           = "flush",
1019         .altname        = "f",
1020         .cfunc          = flush_f,
1021         .oneline        = "flush all in-core file state to disk",
1022 };
1023
1024 static int
1025 truncate_f(int argc, char **argv)
1026 {
1027         int64_t offset;
1028         int ret;
1029
1030         offset = cvtnum(argv[1]);
1031         if (offset < 0) {
1032                 printf("non-numeric truncate argument -- %s\n", argv[1]);
1033                 return 0;
1034         }
1035
1036         ret = bdrv_truncate(bs, offset);
1037         if (ret < 0) {
1038                 printf("truncate: %s", strerror(ret));
1039                 return 0;
1040         }
1041
1042         return 0;
1043 }
1044
1045 static const cmdinfo_t truncate_cmd = {
1046         .name           = "truncate",
1047         .altname        = "t",
1048         .cfunc          = truncate_f,
1049         .argmin         = 1,
1050         .argmax         = 1,
1051         .args           = "off",
1052         .oneline        = "truncates the current file at the given offset",
1053 };
1054
1055 static int
1056 length_f(int argc, char **argv)
1057 {
1058         int64_t size;
1059         char s1[64];
1060
1061         size = bdrv_getlength(bs);
1062         if (size < 0) {
1063                 printf("getlength: %s", strerror(size));
1064                 return 0;
1065         }
1066
1067         cvtstr(size, s1, sizeof(s1));
1068         printf("%s\n", s1);
1069         return 0;
1070 }
1071
1072
1073 static const cmdinfo_t length_cmd = {
1074         .name           = "length",
1075         .altname        = "l",
1076         .cfunc          = length_f,
1077         .oneline        = "gets the length of the current file",
1078 };
1079
1080
1081 static int
1082 info_f(int argc, char **argv)
1083 {
1084         BlockDriverInfo bdi;
1085         char s1[64], s2[64];
1086         int ret;
1087
1088         if (bs->drv && bs->drv->format_name)
1089                 printf("format name: %s\n", bs->drv->format_name);
1090         if (bs->drv && bs->drv->protocol_name)
1091                 printf("format name: %s\n", bs->drv->protocol_name);
1092
1093         ret = bdrv_get_info(bs, &bdi);
1094         if (ret)
1095                 return 0;
1096
1097         cvtstr(bdi.cluster_size, s1, sizeof(s1));
1098         cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1099
1100         printf("cluster size: %s\n", s1);
1101         printf("vm state offset: %s\n", s2);
1102
1103         return 0;
1104 }
1105
1106
1107
1108 static const cmdinfo_t info_cmd = {
1109         .name           = "info",
1110         .altname        = "i",
1111         .cfunc          = info_f,
1112         .oneline        = "prints information about the current file",
1113 };
1114
1115 static int
1116 alloc_f(int argc, char **argv)
1117 {
1118         int64_t offset;
1119         int nb_sectors;
1120         char s1[64];
1121         int num;
1122         int ret;
1123         const char *retstr;
1124
1125         offset = cvtnum(argv[1]);
1126         if (offset & 0x1ff) {
1127                 printf("offset %lld is not sector aligned\n",
1128                         (long long)offset);
1129                 return 0;
1130         }
1131
1132         if (argc == 3)
1133                 nb_sectors = cvtnum(argv[2]);
1134         else
1135                 nb_sectors = 1;
1136
1137         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1138
1139         cvtstr(offset, s1, sizeof(s1));
1140
1141         retstr = ret ? "allocated" : "not allocated";
1142         if (nb_sectors == 1)
1143                 printf("sector %s at offset %s\n", retstr, s1);
1144         else
1145                 printf("%d/%d sectors %s at offset %s\n",
1146                         num, nb_sectors, retstr, s1);
1147         return 0;
1148 }
1149
1150 static const cmdinfo_t alloc_cmd = {
1151         .name           = "alloc",
1152         .altname        = "a",
1153         .argmin         = 1,
1154         .argmax         = 2,
1155         .cfunc          = alloc_f,
1156         .args           = "off [sectors]",
1157         .oneline        = "checks if a sector is present in the file",
1158 };
1159
1160 static int
1161 close_f(int argc, char **argv)
1162 {
1163         bdrv_close(bs);
1164         bs = NULL;
1165         return 0;
1166 }
1167
1168 static const cmdinfo_t close_cmd = {
1169         .name           = "close",
1170         .altname        = "c",
1171         .cfunc          = close_f,
1172         .oneline        = "close the current open file",
1173 };
1174
1175 static int openfile(char *name, int flags)
1176 {
1177         if (bs) {
1178                 fprintf(stderr, "file open already, try 'help close'\n");
1179                 return 1;
1180         }
1181
1182         bs = bdrv_new("hda");
1183         if (!bs)
1184                 return 1;
1185
1186         if (bdrv_open(bs, name, flags) == -1) {
1187                 fprintf(stderr, "%s: can't open device %s\n", progname, name);
1188                 bs = NULL;
1189                 return 1;
1190         }
1191
1192         return 0;
1193 }
1194
1195 static void
1196 open_help(void)
1197 {
1198         printf(
1199 "\n"
1200 " opens a new file in the requested mode\n"
1201 "\n"
1202 " Example:\n"
1203 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1204 "\n"
1205 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1206 " -C, -- create new file if it doesn't exist\n"
1207 " -r, -- open file read-only\n"
1208 " -s, -- use snapshot file\n"
1209 " -n, -- disable host cache\n"
1210 "\n");
1211 }
1212
1213 static const cmdinfo_t open_cmd;
1214
1215 static int
1216 open_f(int argc, char **argv)
1217 {
1218         int flags = 0;
1219         int readonly = 0;
1220         int c;
1221
1222         while ((c = getopt(argc, argv, "snCr")) != EOF) {
1223                 switch (c) {
1224                 case 's':
1225                         flags |= BDRV_O_SNAPSHOT;
1226                         break;
1227                 case 'n':
1228                         flags |= BDRV_O_NOCACHE;
1229                         break;
1230                 case 'C':
1231                         flags |= BDRV_O_CREAT;
1232                         break;
1233                 case 'r':
1234                         readonly = 1;
1235                         break;
1236                 default:
1237                         return command_usage(&open_cmd);
1238                 }
1239         }
1240
1241         if (readonly)
1242                 flags |= BDRV_O_RDONLY;
1243         else
1244                 flags |= BDRV_O_RDWR;
1245
1246         if (optind != argc - 1)
1247                 return command_usage(&open_cmd);
1248
1249         return openfile(argv[optind], flags);
1250 }
1251
1252 static const cmdinfo_t open_cmd = {
1253         .name           = "open",
1254         .altname        = "o",
1255         .cfunc          = open_f,
1256         .argmin         = 1,
1257         .argmax         = -1,
1258         .flags          = CMD_NOFILE_OK,
1259         .args           = "[-Crsn] [path]",
1260         .oneline        = "open the file specified by path",
1261         .help           = open_help,
1262 };
1263
1264 static int
1265 init_args_command(
1266         int     index)
1267 {
1268         /* only one device allowed so far */
1269         if (index >= 1)
1270                 return 0;
1271         return ++index;
1272 }
1273
1274 static int
1275 init_check_command(
1276         const cmdinfo_t *ct)
1277 {
1278         if (ct->flags & CMD_FLAG_GLOBAL)
1279                 return 1;
1280         if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1281                 fprintf(stderr, "no file open, try 'help open'\n");
1282                 return 0;
1283         }
1284         return 1;
1285 }
1286
1287 static void usage(const char *name)
1288 {
1289         printf(
1290 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
1291 "QEMU Disk exerciser\n"
1292 "\n"
1293 "  -C, --create         create new file if it doesn't exist\n"
1294 "  -c, --cmd            command to execute\n"
1295 "  -r, --read-only      export read-only\n"
1296 "  -s, --snapshot       use snapshot file\n"
1297 "  -n, --nocache        disable host cache\n"
1298 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1299 "  -h, --help           display this help and exit\n"
1300 "  -V, --version        output version information and exit\n"
1301 "\n",
1302         name);
1303 }
1304
1305
1306 int main(int argc, char **argv)
1307 {
1308         int readonly = 0;
1309         const char *sopt = "hVc:Crsnm";
1310         struct option lopt[] = {
1311                 { "help", 0, 0, 'h' },
1312                 { "version", 0, 0, 'V' },
1313                 { "offset", 1, 0, 'o' },
1314                 { "cmd", 1, 0, 'c' },
1315                 { "create", 0, 0, 'C' },
1316                 { "read-only", 0, 0, 'r' },
1317                 { "snapshot", 0, 0, 's' },
1318                 { "nocache", 0, 0, 'n' },
1319                 { "misalign", 0, 0, 'm' },
1320                 { NULL, 0, 0, 0 }
1321         };
1322         int c;
1323         int opt_index = 0;
1324         int flags = 0;
1325
1326         progname = basename(argv[0]);
1327
1328         while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1329                 switch (c) {
1330                 case 's':
1331                         flags |= BDRV_O_SNAPSHOT;
1332                         break;
1333                 case 'n':
1334                         flags |= BDRV_O_NOCACHE;
1335                         break;
1336                 case 'c':
1337                         add_user_command(optarg);
1338                         break;
1339                 case 'C':
1340                         flags |= BDRV_O_CREAT;
1341                         break;
1342                 case 'r':
1343                         readonly = 1;
1344                         break;
1345                 case 'm':
1346                         misalign = 1;
1347                         break;
1348                 case 'V':
1349                         printf("%s version %s\n", progname, VERSION);
1350                         exit(0);
1351                 case 'h':
1352                         usage(progname);
1353                         exit(0);
1354                 default:
1355                         usage(progname);
1356                         exit(1);
1357                 }
1358         }
1359
1360         if ((argc - optind) > 1) {
1361                 usage(progname);
1362                 exit(1);
1363         }
1364
1365         bdrv_init();
1366
1367         /* initialize commands */
1368         quit_init();
1369         help_init();
1370         add_command(&open_cmd);
1371         add_command(&close_cmd);
1372         add_command(&read_cmd);
1373         add_command(&readv_cmd);
1374         add_command(&write_cmd);
1375         add_command(&writev_cmd);
1376         add_command(&aio_read_cmd);
1377         add_command(&aio_write_cmd);
1378         add_command(&aio_flush_cmd);
1379         add_command(&flush_cmd);
1380         add_command(&truncate_cmd);
1381         add_command(&length_cmd);
1382         add_command(&info_cmd);
1383         add_command(&alloc_cmd);
1384
1385         add_args_command(init_args_command);
1386         add_check_command(init_check_command);
1387
1388         /* open the device */
1389         if (readonly)
1390                 flags |= BDRV_O_RDONLY;
1391         else
1392                 flags |= BDRV_O_RDWR;
1393
1394         if ((argc - optind) == 1)
1395                 openfile(argv[optind], flags);
1396         command_loop();
1397
1398         /*
1399          * Make sure all outstanding requests get flushed the program exits.
1400          */
1401         qemu_aio_flush();
1402
1403         if (bs)
1404                 bdrv_close(bs);
1405         return 0;
1406 }