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                 goto out;
 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                 goto out;
 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 out:
 386         qemu_io_free(buf);
 387
 388         return 0;
 389 }
 390
 391 static const cmdinfo_t read_cmd = {
 392         .name           = "read",
 393         .altname        = "r",
 394         .cfunc          = read_f,
 395         .argmin         = 2,
 396         .argmax         = -1,
 397         .args           = "[-aCpqv] [-P pattern [-s off] [-l len]] off len",
 398         .oneline        = "reads a number of bytes at a specified offset",
 399         .help           = read_help,
 400 };
 401
 402 static const cmdinfo_t readv_cmd;
 403
 404 static void
 405 readv_help(void)
 406 {
 407         printf(
 408 "\n"
 409 " reads a range of bytes from the given offset into multiple buffers\n"
 410 "\n"
 411 " Example:\n"
 412 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 413 "\n"
 414 " Reads a segment of the currently open file, optionally dumping it to the\n"
 415 " standard output stream (with -v option) for subsequent inspection.\n"
 416 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 417 " -C, -- report statistics in a machine parsable format\n"
 418 " -P, -- use a pattern to verify read data\n"
 419 " -v, -- dump buffer to standard output\n"
 420 " -q, -- quite mode, do not show I/O statistics\n"
 421 "\n");
 422 }
 423
 424 static int
 425 readv_f(int argc, char **argv)
 426 {
 427         struct timeval t1, t2;
 428         int Cflag = 0, qflag = 0, vflag = 0;
 429         int c, cnt;
 430         char *buf;
 431         int64_t offset;
 432         int total;
 433         int nr_iov;
 434         QEMUIOVector qiov;
 435         int pattern = 0;
 436         int Pflag = 0;
 437
 438         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 439                 switch (c) {
 440                 case 'C':
 441                         Cflag = 1;
 442                         break;
 443                 case 'P':
 444                         Pflag = 1;
 445                         pattern = atoi(optarg);
 446                         break;
 447                 case 'q':
 448                         qflag = 1;
 449                         break;
 450                 case 'v':
 451                         vflag = 1;
 452                         break;
 453                 default:
 454                         return command_usage(&readv_cmd);
 455                 }
 456         }
 457
 458         if (optind > argc - 2)
 459                 return command_usage(&readv_cmd);
 460
 461
 462         offset = cvtnum(argv[optind]);
 463         if (offset < 0) {
 464                 printf("non-numeric length argument -- %s\n", argv[optind]);
 465                 return 0;
 466         }
 467         optind++;
 468
 469         if (offset & 0x1ff) {
 470                 printf("offset %lld is not sector aligned\n",
 471                         (long long)offset);
 472                 return 0;
 473         }
 474
 475         nr_iov = argc - optind;
 476         buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
 477
 478         gettimeofday(&t1, NULL);
 479         cnt = do_aio_readv(&qiov, offset, &total);
 480         gettimeofday(&t2, NULL);
 481
 482         if (cnt < 0) {
 483                 printf("readv failed: %s\n", strerror(-cnt));
 484                 goto out;
 485         }
 486
 487         if (Pflag) {
 488                 void* cmp_buf = malloc(qiov.size);
 489                 memset(cmp_buf, pattern, qiov.size);
 490                 if (memcmp(buf, cmp_buf, qiov.size)) {
 491                         printf("Pattern verification failed at offset %lld, "
 492                                 "%zd bytes\n",
 493                                 (long long) offset, qiov.size);
 494                 }
 495                 free(cmp_buf);
 496         }
 497
 498         if (qflag)
 499                 goto out;
 500
 501         if (vflag)
 502                 dump_buffer(buf, offset, qiov.size);
 503
 504         /* Finally, report back -- -C gives a parsable format */
 505         t2 = tsub(t2, t1);
 506         print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 507
 508 out:
 509         qemu_io_free(buf);
 510         return 0;
 511 }
 512
 513 static const cmdinfo_t readv_cmd = {
 514         .name           = "readv",
 515         .cfunc          = readv_f,
 516         .argmin         = 2,
 517         .argmax         = -1,
 518         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 519         .oneline        = "reads a number of bytes at a specified offset",
 520         .help           = readv_help,
 521 };
 522
 523 static const cmdinfo_t write_cmd;
 524
 525 static void
 526 write_help(void)
 527 {
 528         printf(
 529 "\n"
 530 " writes a range of bytes from the given offset\n"
 531 "\n"
 532 " Example:\n"
 533 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 534 "\n"
 535 " Writes into a segment of the currently open file, using a buffer\n"
 536 " filled with a set pattern (0xcdcdcdcd).\n"
 537 " -p, -- use bdrv_pwrite to write the file\n"
 538 " -P, -- use different pattern to fill file\n"
 539 " -C, -- report statistics in a machine parsable format\n"
 540 " -q, -- quite mode, do not show I/O statistics\n"
 541 "\n");
 542 }
 543
 544 static int
 545 write_f(int argc, char **argv)
 546 {
 547         struct timeval t1, t2;
 548         int Cflag = 0, pflag = 0, qflag = 0;
 549         int c, cnt;
 550         char *buf;
 551         int64_t offset;
 552         int count;
 553         /* Some compilers get confused and warn if this is not initialized.  */
 554         int total = 0;
 555         int pattern = 0xcd;
 556
 557         while ((c = getopt(argc, argv, "CpP:q")) != EOF) {
 558                 switch (c) {
 559                 case 'C':
 560                         Cflag = 1;
 561                         break;
 562                 case 'p':
 563                         pflag = 1;
 564                         break;
 565                 case 'P':
 566                         pattern = atoi(optarg);
 567                         break;
 568                 case 'q':
 569                         qflag = 1;
 570                         break;
 571                 default:
 572                         return command_usage(&write_cmd);
 573                 }
 574         }
 575
 576         if (optind != argc - 2)
 577                 return command_usage(&write_cmd);
 578
 579         offset = cvtnum(argv[optind]);
 580         if (offset < 0) {
 581                 printf("non-numeric length argument -- %s\n", argv[optind]);
 582                 return 0;
 583         }
 584
 585         optind++;
 586         count = cvtnum(argv[optind]);
 587         if (count < 0) {
 588                 printf("non-numeric length argument -- %s\n", argv[optind]);
 589                 return 0;
 590         }
 591
 592         if (!pflag) {
 593                 if (offset & 0x1ff) {
 594                         printf("offset %lld is not sector aligned\n",
 595                                 (long long)offset);
 596                         return 0;
 597                 }
 598
 599                 if (count & 0x1ff) {
 600                         printf("count %d is not sector aligned\n",
 601                                 count);
 602                         return 0;
 603                 }
 604         }
 605
 606         buf = qemu_io_alloc(count, pattern);
 607
 608         gettimeofday(&t1, NULL);
 609         if (pflag)
 610                 cnt = do_pwrite(buf, offset, count, &total);
 611         else
 612                 cnt = do_write(buf, offset, count, &total);
 613         gettimeofday(&t2, NULL);
 614
 615         if (cnt < 0) {
 616                 printf("write failed: %s\n", strerror(-cnt));
 617                 goto out;
 618         }
 619
 620         if (qflag)
 621                 goto out;
 622
 623         /* Finally, report back -- -C gives a parsable format */
 624         t2 = tsub(t2, t1);
 625         print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 626
 627 out:
 628         qemu_io_free(buf);
 629
 630         return 0;
 631 }
 632
 633 static const cmdinfo_t write_cmd = {
 634         .name           = "write",
 635         .altname        = "w",
 636         .cfunc          = write_f,
 637         .argmin         = 2,
 638         .argmax         = -1,
 639         .args           = "[-aCpq] [-P pattern ] off len",
 640         .oneline        = "writes a number of bytes at a specified offset",
 641         .help           = write_help,
 642 };
 643
 644 static const cmdinfo_t writev_cmd;
 645
 646 static void
 647 writev_help(void)
 648 {
 649         printf(
 650 "\n"
 651 " writes a range of bytes from the given offset source from multiple buffers\n"
 652 "\n"
 653 " Example:\n"
 654 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 655 "\n"
 656 " Writes into a segment of the currently open file, using a buffer\n"
 657 " filled with a set pattern (0xcdcdcdcd).\n"
 658 " -P, -- use different pattern to fill file\n"
 659 " -C, -- report statistics in a machine parsable format\n"
 660 " -q, -- quite mode, do not show I/O statistics\n"
 661 "\n");
 662 }
 663
 664 static int
 665 writev_f(int argc, char **argv)
 666 {
 667         struct timeval t1, t2;
 668         int Cflag = 0, qflag = 0;
 669         int c, cnt;
 670         char *buf;
 671         int64_t offset;
 672         int total;
 673         int nr_iov;
 674         int pattern = 0xcd;
 675         QEMUIOVector qiov;
 676
 677         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 678                 switch (c) {
 679                 case 'C':
 680                         Cflag = 1;
 681                         break;
 682                 case 'q':
 683                         qflag = 1;
 684                         break;
 685                 case 'P':
 686                         pattern = atoi(optarg);
 687                         break;
 688                 default:
 689                         return command_usage(&writev_cmd);
 690                 }
 691         }
 692
 693         if (optind > argc - 2)
 694                 return command_usage(&writev_cmd);
 695
 696         offset = cvtnum(argv[optind]);
 697         if (offset < 0) {
 698                 printf("non-numeric length argument -- %s\n", argv[optind]);
 699                 return 0;
 700         }
 701         optind++;
 702
 703         if (offset & 0x1ff) {
 704                 printf("offset %lld is not sector aligned\n",
 705                         (long long)offset);
 706                 return 0;
 707         }
 708
 709         nr_iov = argc - optind;
 710         buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
 711
 712         gettimeofday(&t1, NULL);
 713         cnt = do_aio_writev(&qiov, offset, &total);
 714         gettimeofday(&t2, NULL);
 715
 716         if (cnt < 0) {
 717                 printf("writev failed: %s\n", strerror(-cnt));
 718                 goto out;
 719         }
 720
 721         if (qflag)
 722                 goto out;
 723
 724         /* Finally, report back -- -C gives a parsable format */
 725         t2 = tsub(t2, t1);
 726         print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 727 out:
 728         qemu_io_free(buf);
 729         return 0;
 730 }
 731
 732 static const cmdinfo_t writev_cmd = {
 733         .name           = "writev",
 734         .cfunc          = writev_f,
 735         .argmin         = 2,
 736         .argmax         = -1,
 737         .args           = "[-Cq] [-P pattern ] off len [len..]",
 738         .oneline        = "writes a number of bytes at a specified offset",
 739         .help           = writev_help,
 740 };
 741
 742 struct aio_ctx {
 743         QEMUIOVector qiov;
 744         int64_t offset;
 745         char *buf;
 746         int qflag;
 747         int vflag;
 748         int Cflag;
 749         int Pflag;
 750         int pattern;
 751         struct timeval t1;
 752 };
 753
 754 static void
 755 aio_write_done(void *opaque, int ret)
 756 {
 757         struct aio_ctx *ctx = opaque;
 758         struct timeval t2;
 759
 760         gettimeofday(&t2, NULL);
 761
 762
 763         if (ret < 0) {
 764                 printf("aio_write failed: %s\n", strerror(-ret));
 765                 goto out;
 766         }
 767
 768         if (ctx->qflag) {
 769                 goto out;
 770         }
 771
 772         /* Finally, report back -- -C gives a parsable format */
 773         t2 = tsub(t2, ctx->t1);
 774         print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
 775                      ctx->qiov.size, 1, ctx->Cflag);
 776 out:
 777         qemu_io_free(ctx->buf);
 778         free(ctx);
 779 }
 780
 781 static const cmdinfo_t aio_read_cmd;
 782
 783 static void
 784 aio_read_done(void *opaque, int ret)
 785 {
 786         struct aio_ctx *ctx = opaque;
 787         struct timeval t2;
 788
 789         gettimeofday(&t2, NULL);
 790
 791         if (ret < 0) {
 792                 printf("readv failed: %s\n", strerror(-ret));
 793                 goto out;
 794         }
 795
 796         if (ctx->Pflag) {
 797                 void *cmp_buf = malloc(ctx->qiov.size);
 798
 799                 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
 800                 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
 801                         printf("Pattern verification failed at offset %lld, "
 802                                 "%zd bytes\n",
 803                                 (long long) ctx->offset, ctx->qiov.size);
 804                 }
 805                 free(cmp_buf);
 806         }
 807
 808         if (ctx->qflag) {
 809                 goto out;
 810         }
 811
 812         if (ctx->vflag) {
 813                 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
 814         }
 815
 816         /* Finally, report back -- -C gives a parsable format */
 817         t2 = tsub(t2, ctx->t1);
 818         print_report("read", &t2, ctx->offset, ctx->qiov.size,
 819                      ctx->qiov.size, 1, ctx->Cflag);
 820 out:
 821         qemu_io_free(ctx->buf);
 822         free(ctx);
 823 }
 824
 825 static void
 826 aio_read_help(void)
 827 {
 828         printf(
 829 "\n"
 830 " asynchronously reads a range of bytes from the given offset\n"
 831 "\n"
 832 " Example:\n"
 833 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 834 "\n"
 835 " Reads a segment of the currently open file, optionally dumping it to the\n"
 836 " standard output stream (with -v option) for subsequent inspection.\n"
 837 " The read is performed asynchronously and should the aio_flush command \n"
 838 " should be used to ensure all outstanding aio requests have been completed\n"
 839 " -C, -- report statistics in a machine parsable format\n"
 840 " -P, -- use a pattern to verify read data\n"
 841 " -v, -- dump buffer to standard output\n"
 842 " -q, -- quite mode, do not show I/O statistics\n"
 843 "\n");
 844 }
 845
 846 static int
 847 aio_read_f(int argc, char **argv)
 848 {
 849         int nr_iov, c;
 850         struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 851         BlockDriverAIOCB *acb;
 852
 853         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 854                 switch (c) {
 855                 case 'C':
 856                         ctx->Cflag = 1;
 857                         break;
 858                 case 'P':
 859                         ctx->Pflag = 1;
 860                         ctx->pattern = atoi(optarg);
 861                         break;
 862                 case 'q':
 863                         ctx->qflag = 1;
 864                         break;
 865                 case 'v':
 866                         ctx->vflag = 1;
 867                         break;
 868                 default:
 869                         free(ctx);
 870                         return command_usage(&aio_read_cmd);
 871                 }
 872         }
 873
 874         if (optind > argc - 2) {
 875                 free(ctx);
 876                 return command_usage(&aio_read_cmd);
 877         }
 878
 879         ctx->offset = cvtnum(argv[optind]);
 880         if (ctx->offset < 0) {
 881                 printf("non-numeric length argument -- %s\n", argv[optind]);
 882                 free(ctx);
 883                 return 0;
 884         }
 885         optind++;
 886
 887         if (ctx->offset & 0x1ff) {
 888                 printf("offset %lld is not sector aligned\n",
 889                         (long long)ctx->offset);
 890                 free(ctx);
 891                 return 0;
 892         }
 893
 894         nr_iov = argc - optind;
 895         ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
 896
 897         gettimeofday(&ctx->t1, NULL);
 898         acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
 899                               ctx->qiov.size >> 9, aio_read_done, ctx);
 900         if (!acb) {
 901                 free(ctx->buf);
 902                 free(ctx);
 903                 return -EIO;
 904         }
 905
 906         return 0;
 907 }
 908
 909 static const cmdinfo_t aio_read_cmd = {
 910         .name           = "aio_read",
 911         .cfunc          = aio_read_f,
 912         .argmin         = 2,
 913         .argmax         = -1,
 914         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 915         .oneline        = "asynchronously reads a number of bytes",
 916         .help           = aio_read_help,
 917 };
 918
 919 static const cmdinfo_t aio_write_cmd;
 920
 921 static void
 922 aio_write_help(void)
 923 {
 924         printf(
 925 "\n"
 926 " asynchronously writes a range of bytes from the given offset source \n"
 927 " from multiple buffers\n"
 928 "\n"
 929 " Example:\n"
 930 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 931 "\n"
 932 " Writes into a segment of the currently open file, using a buffer\n"
 933 " filled with a set pattern (0xcdcdcdcd).\n"
 934 " The write is performed asynchronously and should the aio_flush command \n"
 935 " should be used to ensure all outstanding aio requests have been completed\n"
 936 " -P, -- use different pattern to fill file\n"
 937 " -C, -- report statistics in a machine parsable format\n"
 938 " -q, -- quite mode, do not show I/O statistics\n"
 939 "\n");
 940 }
 941
 942
 943 static int
 944 aio_write_f(int argc, char **argv)
 945 {
 946         int nr_iov, c;
 947         int pattern = 0xcd;
 948         struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 949         BlockDriverAIOCB *acb;
 950
 951         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 952                 switch (c) {
 953                 case 'C':
 954                         ctx->Cflag = 1;
 955                         break;
 956                 case 'q':
 957                         ctx->qflag = 1;
 958                         break;
 959                 case 'P':
 960                         pattern = atoi(optarg);
 961                         break;
 962                 default:
 963                         free(ctx);
 964                         return command_usage(&aio_write_cmd);
 965                 }
 966         }
 967
 968         if (optind > argc - 2) {
 969                 free(ctx);
 970                 return command_usage(&aio_write_cmd);
 971         }
 972
 973         ctx->offset = cvtnum(argv[optind]);
 974         if (ctx->offset < 0) {
 975                 printf("non-numeric length argument -- %s\n", argv[optind]);
 976                 free(ctx);
 977                 return 0;
 978         }
 979         optind++;
 980
 981         if (ctx->offset & 0x1ff) {
 982                 printf("offset %lld is not sector aligned\n",
 983                         (long long)ctx->offset);
 984                 free(ctx);
 985                 return 0;
 986         }
 987
 988         nr_iov = argc - optind;
 989         ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
 990
 991         gettimeofday(&ctx->t1, NULL);
 992         acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
 993                               ctx->qiov.size >> 9, aio_write_done, ctx);
 994         if (!acb) {
 995                 free(ctx->buf);
 996                 free(ctx);
 997                 return -EIO;
 998         }
 999
1000         return 0;
1001 }
1002
1003 static const cmdinfo_t aio_write_cmd = {
1004         .name           = "aio_write",
1005         .cfunc          = aio_write_f,
1006         .argmin         = 2,
1007         .argmax         = -1,
1008         .args           = "[-Cq] [-P pattern ] off len [len..]",
1009         .oneline        = "asynchronously writes a number of bytes",
1010         .help           = aio_write_help,
1011 };
1012
1013 static int
1014 aio_flush_f(int argc, char **argv)
1015 {
1016         qemu_aio_flush();
1017         return 0;
1018 }
1019
1020 static const cmdinfo_t aio_flush_cmd = {
1021         .name           = "aio_flush",
1022         .cfunc          = aio_flush_f,
1023         .oneline        = "completes all outstanding aio requets"
1024 };
1025
1026 static int
1027 flush_f(int argc, char **argv)
1028 {
1029         bdrv_flush(bs);
1030         return 0;
1031 }
1032
1033 static const cmdinfo_t flush_cmd = {
1034         .name           = "flush",
1035         .altname        = "f",
1036         .cfunc          = flush_f,
1037         .oneline        = "flush all in-core file state to disk",
1038 };
1039
1040 static int
1041 truncate_f(int argc, char **argv)
1042 {
1043         int64_t offset;
1044         int ret;
1045
1046         offset = cvtnum(argv[1]);
1047         if (offset < 0) {
1048                 printf("non-numeric truncate argument -- %s\n", argv[1]);
1049                 return 0;
1050         }
1051
1052         ret = bdrv_truncate(bs, offset);
1053         if (ret < 0) {
1054                 printf("truncate: %s", strerror(ret));
1055                 return 0;
1056         }
1057
1058         return 0;
1059 }
1060
1061 static const cmdinfo_t truncate_cmd = {
1062         .name           = "truncate",
1063         .altname        = "t",
1064         .cfunc          = truncate_f,
1065         .argmin         = 1,
1066         .argmax         = 1,
1067         .args           = "off",
1068         .oneline        = "truncates the current file at the given offset",
1069 };
1070
1071 static int
1072 length_f(int argc, char **argv)
1073 {
1074         int64_t size;
1075         char s1[64];
1076
1077         size = bdrv_getlength(bs);
1078         if (size < 0) {
1079                 printf("getlength: %s", strerror(size));
1080                 return 0;
1081         }
1082
1083         cvtstr(size, s1, sizeof(s1));
1084         printf("%s\n", s1);
1085         return 0;
1086 }
1087
1088
1089 static const cmdinfo_t length_cmd = {
1090         .name           = "length",
1091         .altname        = "l",
1092         .cfunc          = length_f,
1093         .oneline        = "gets the length of the current file",
1094 };
1095
1096
1097 static int
1098 info_f(int argc, char **argv)
1099 {
1100         BlockDriverInfo bdi;
1101         char s1[64], s2[64];
1102         int ret;
1103
1104         if (bs->drv && bs->drv->format_name)
1105                 printf("format name: %s\n", bs->drv->format_name);
1106         if (bs->drv && bs->drv->protocol_name)
1107                 printf("format name: %s\n", bs->drv->protocol_name);
1108
1109         ret = bdrv_get_info(bs, &bdi);
1110         if (ret)
1111                 return 0;
1112
1113         cvtstr(bdi.cluster_size, s1, sizeof(s1));
1114         cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1115
1116         printf("cluster size: %s\n", s1);
1117         printf("vm state offset: %s\n", s2);
1118
1119         return 0;
1120 }
1121
1122
1123
1124 static const cmdinfo_t info_cmd = {
1125         .name           = "info",
1126         .altname        = "i",
1127         .cfunc          = info_f,
1128         .oneline        = "prints information about the current file",
1129 };
1130
1131 static int
1132 alloc_f(int argc, char **argv)
1133 {
1134         int64_t offset;
1135         int nb_sectors;
1136         char s1[64];
1137         int num;
1138         int ret;
1139         const char *retstr;
1140
1141         offset = cvtnum(argv[1]);
1142         if (offset & 0x1ff) {
1143                 printf("offset %lld is not sector aligned\n",
1144                         (long long)offset);
1145                 return 0;
1146         }
1147
1148         if (argc == 3)
1149                 nb_sectors = cvtnum(argv[2]);
1150         else
1151                 nb_sectors = 1;
1152
1153         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1154
1155         cvtstr(offset, s1, sizeof(s1));
1156
1157         retstr = ret ? "allocated" : "not allocated";
1158         if (nb_sectors == 1)
1159                 printf("sector %s at offset %s\n", retstr, s1);
1160         else
1161                 printf("%d/%d sectors %s at offset %s\n",
1162                         num, nb_sectors, retstr, s1);
1163         return 0;
1164 }
1165
1166 static const cmdinfo_t alloc_cmd = {
1167         .name           = "alloc",
1168         .altname        = "a",
1169         .argmin         = 1,
1170         .argmax         = 2,
1171         .cfunc          = alloc_f,
1172         .args           = "off [sectors]",
1173         .oneline        = "checks if a sector is present in the file",
1174 };
1175
1176 static int
1177 close_f(int argc, char **argv)
1178 {
1179         bdrv_close(bs);
1180         bs = NULL;
1181         return 0;
1182 }
1183
1184 static const cmdinfo_t close_cmd = {
1185         .name           = "close",
1186         .altname        = "c",
1187         .cfunc          = close_f,
1188         .oneline        = "close the current open file",
1189 };
1190
1191 static int openfile(char *name, int flags, int growable)
1192 {
1193         if (bs) {
1194                 fprintf(stderr, "file open already, try 'help close'\n");
1195                 return 1;
1196         }
1197
1198         bs = bdrv_new("hda");
1199         if (!bs)
1200                 return 1;
1201
1202         if (bdrv_open(bs, name, flags) == -1) {
1203                 fprintf(stderr, "%s: can't open device %s\n", progname, name);
1204                 bs = NULL;
1205                 return 1;
1206         }
1207
1208
1209         if (growable) {
1210                 if (!bs->drv || !bs->drv->protocol_name) {
1211                         fprintf(stderr,
1212                                 "%s: only protocols can be opened growable\n",
1213                                 progname);
1214                         return 1;
1215                 }
1216                 bs->growable = 1;
1217         }
1218
1219         return 0;
1220 }
1221
1222 static void
1223 open_help(void)
1224 {
1225         printf(
1226 "\n"
1227 " opens a new file in the requested mode\n"
1228 "\n"
1229 " Example:\n"
1230 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1231 "\n"
1232 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1233 " -C, -- create new file if it doesn't exist\n"
1234 " -r, -- open file read-only\n"
1235 " -s, -- use snapshot file\n"
1236 " -n, -- disable host cache\n"
1237 " -g, -- allow file to grow (only applies to protocols)"
1238 "\n");
1239 }
1240
1241 static const cmdinfo_t open_cmd;
1242
1243 static int
1244 open_f(int argc, char **argv)
1245 {
1246         int flags = 0;
1247         int readonly = 0;
1248         int growable = 0;
1249         int c;
1250
1251         while ((c = getopt(argc, argv, "snCrg")) != EOF) {
1252                 switch (c) {
1253                 case 's':
1254                         flags |= BDRV_O_SNAPSHOT;
1255                         break;
1256                 case 'n':
1257                         flags |= BDRV_O_NOCACHE;
1258                         break;
1259                 case 'C':
1260                         flags |= BDRV_O_CREAT;
1261                         break;
1262                 case 'r':
1263                         readonly = 1;
1264                         break;
1265                 case 'g':
1266                         growable = 1;
1267                         break;
1268                 default:
1269                         return command_usage(&open_cmd);
1270                 }
1271         }
1272
1273         if (readonly)
1274                 flags |= BDRV_O_RDONLY;
1275         else
1276                 flags |= BDRV_O_RDWR;
1277
1278         if (optind != argc - 1)
1279                 return command_usage(&open_cmd);
1280
1281         return openfile(argv[optind], flags, growable);
1282 }
1283
1284 static const cmdinfo_t open_cmd = {
1285         .name           = "open",
1286         .altname        = "o",
1287         .cfunc          = open_f,
1288         .argmin         = 1,
1289         .argmax         = -1,
1290         .flags          = CMD_NOFILE_OK,
1291         .args           = "[-Crsn] [path]",
1292         .oneline        = "open the file specified by path",
1293         .help           = open_help,
1294 };
1295
1296 static int
1297 init_args_command(
1298         int     index)
1299 {
1300         /* only one device allowed so far */
1301         if (index >= 1)
1302                 return 0;
1303         return ++index;
1304 }
1305
1306 static int
1307 init_check_command(
1308         const cmdinfo_t *ct)
1309 {
1310         if (ct->flags & CMD_FLAG_GLOBAL)
1311                 return 1;
1312         if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1313                 fprintf(stderr, "no file open, try 'help open'\n");
1314                 return 0;
1315         }
1316         return 1;
1317 }
1318
1319 static void usage(const char *name)
1320 {
1321         printf(
1322 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
1323 "QEMU Disk exerciser\n"
1324 "\n"
1325 "  -C, --create         create new file if it doesn't exist\n"
1326 "  -c, --cmd            command to execute\n"
1327 "  -r, --read-only      export read-only\n"
1328 "  -s, --snapshot       use snapshot file\n"
1329 "  -n, --nocache        disable host cache\n"
1330 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1331 "  -h, --help           display this help and exit\n"
1332 "  -V, --version        output version information and exit\n"
1333 "\n",
1334         name);
1335 }
1336
1337
1338 int main(int argc, char **argv)
1339 {
1340         int readonly = 0;
1341         int growable = 0;
1342         const char *sopt = "hVc:Crsnmg";
1343         struct option lopt[] = {
1344                 { "help", 0, 0, 'h' },
1345                 { "version", 0, 0, 'V' },
1346                 { "offset", 1, 0, 'o' },
1347                 { "cmd", 1, 0, 'c' },
1348                 { "create", 0, 0, 'C' },
1349                 { "read-only", 0, 0, 'r' },
1350                 { "snapshot", 0, 0, 's' },
1351                 { "nocache", 0, 0, 'n' },
1352                 { "misalign", 0, 0, 'm' },
1353                 { "growable", 0, 0, 'g' },
1354                 { NULL, 0, 0, 0 }
1355         };
1356         int c;
1357         int opt_index = 0;
1358         int flags = 0;
1359
1360         progname = basename(argv[0]);
1361
1362         while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1363                 switch (c) {
1364                 case 's':
1365                         flags |= BDRV_O_SNAPSHOT;
1366                         break;
1367                 case 'n':
1368                         flags |= BDRV_O_NOCACHE;
1369                         break;
1370                 case 'c':
1371                         add_user_command(optarg);
1372                         break;
1373                 case 'C':
1374                         flags |= BDRV_O_CREAT;
1375                         break;
1376                 case 'r':
1377                         readonly = 1;
1378                         break;
1379                 case 'm':
1380                         misalign = 1;
1381                         break;
1382                 case 'g':
1383                         growable = 1;
1384                         break;
1385                 case 'V':
1386                         printf("%s version %s\n", progname, VERSION);
1387                         exit(0);
1388                 case 'h':
1389                         usage(progname);
1390                         exit(0);
1391                 default:
1392                         usage(progname);
1393                         exit(1);
1394                 }
1395         }
1396
1397         if ((argc - optind) > 1) {
1398                 usage(progname);
1399                 exit(1);
1400         }
1401
1402         bdrv_init();
1403
1404         /* initialize commands */
1405         quit_init();
1406         help_init();
1407         add_command(&open_cmd);
1408         add_command(&close_cmd);
1409         add_command(&read_cmd);
1410         add_command(&readv_cmd);
1411         add_command(&write_cmd);
1412         add_command(&writev_cmd);
1413         add_command(&aio_read_cmd);
1414         add_command(&aio_write_cmd);
1415         add_command(&aio_flush_cmd);
1416         add_command(&flush_cmd);
1417         add_command(&truncate_cmd);
1418         add_command(&length_cmd);
1419         add_command(&info_cmd);
1420         add_command(&alloc_cmd);
1421
1422         add_args_command(init_args_command);
1423         add_check_command(init_check_command);
1424
1425         /* open the device */
1426         if (readonly)
1427                 flags |= BDRV_O_RDONLY;
1428         else
1429                 flags |= BDRV_O_RDWR;
1430
1431         if ((argc - optind) == 1)
1432                 openfile(argv[optind], flags, growable);
1433         command_loop();
1434
1435         /*
1436          * Make sure all outstanding requests get flushed the program exits.
1437          */
1438         qemu_aio_flush();
1439
1440         if (bs)
1441                 bdrv_close(bs);
1442         return 0;
1443 }