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 static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
 191 {
 192         *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
 193         if (*total < 0)
 194                 return *total;
 195         return 1;
 196 }
 197
 198 static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
 199 {
 200         *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
 201         if (*total < 0)
 202                 return *total;
 203         return 1;
 204 }
 205
 206 #define NOT_DONE 0x7fffffff
 207 static void aio_rw_done(void *opaque, int ret)
 208 {
 209         *(int *)opaque = ret;
 210 }
 211
 212 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
 213 {
 214         BlockDriverAIOCB *acb;
 215         int async_ret = NOT_DONE;
 216
 217         acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
 218                              aio_rw_done, &async_ret);
 219         if (!acb)
 220                 return -EIO;
 221
 222         while (async_ret == NOT_DONE)
 223                 qemu_aio_wait();
 224
 225         *total = qiov->size;
 226         return async_ret < 0 ? async_ret : 1;
 227 }
 228
 229 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
 230 {
 231         BlockDriverAIOCB *acb;
 232         int async_ret = NOT_DONE;
 233
 234         acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
 235                               aio_rw_done, &async_ret);
 236         if (!acb)
 237                 return -EIO;
 238
 239         while (async_ret == NOT_DONE)
 240                 qemu_aio_wait();
 241
 242         *total = qiov->size;
 243         return async_ret < 0 ? async_ret : 1;
 244 }
 245
 246
 247 static const cmdinfo_t read_cmd;
 248
 249 static void
 250 read_help(void)
 251 {
 252         printf(
 253 "\n"
 254 " reads a range of bytes from the given offset\n"
 255 "\n"
 256 " Example:\n"
 257 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
 258 "\n"
 259 " Reads a segment of the currently open file, optionally dumping it to the\n"
 260 " standard output stream (with -v option) for subsequent inspection.\n"
 261 " -b, -- read from the VM state rather than the virtual disk\n"
 262 " -C, -- report statistics in a machine parsable format\n"
 263 " -l, -- length for pattern verification (only with -P)\n"
 264 " -p, -- use bdrv_pread to read the file\n"
 265 " -P, -- use a pattern to verify read data\n"
 266 " -q, -- quite mode, do not show I/O statistics\n"
 267 " -s, -- start offset for pattern verification (only with -P)\n"
 268 " -v, -- dump buffer to standard output\n"
 269 "\n");
 270 }
 271
 272 static int
 273 read_f(int argc, char **argv)
 274 {
 275         struct timeval t1, t2;
 276         int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 277         int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
 278         int c, cnt;
 279         char *buf;
 280         int64_t offset;
 281         int count;
 282         /* Some compilers get confused and warn if this is not initialized.  */
 283         int total = 0;
 284         int pattern = 0, pattern_offset = 0, pattern_count = 0;
 285
 286         while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
 287                 switch (c) {
 288                 case 'b':
 289                         bflag = 1;
 290                         break;
 291                 case 'C':
 292                         Cflag = 1;
 293                         break;
 294                 case 'l':
 295                         lflag = 1;
 296                         pattern_count = cvtnum(optarg);
 297                         if (pattern_count < 0) {
 298                                 printf("non-numeric length argument -- %s\n", optarg);
 299                                 return 0;
 300                         }
 301                         break;
 302                 case 'p':
 303                         pflag = 1;
 304                         break;
 305                 case 'P':
 306                         Pflag = 1;
 307                         pattern = atoi(optarg);
 308                         break;
 309                 case 'q':
 310                         qflag = 1;
 311                         break;
 312                 case 's':
 313                         sflag = 1;
 314                         pattern_offset = cvtnum(optarg);
 315                         if (pattern_offset < 0) {
 316                                 printf("non-numeric length argument -- %s\n", optarg);
 317                                 return 0;
 318                         }
 319                         break;
 320                 case 'v':
 321                         vflag = 1;
 322                         break;
 323                 default:
 324                         return command_usage(&read_cmd);
 325                 }
 326         }
 327
 328         if (optind != argc - 2)
 329                 return command_usage(&read_cmd);
 330
 331         if (bflag && pflag) {
 332                 printf("-b and -p cannot be specified at the same time\n");
 333                 return 0;
 334         }
 335
 336         offset = cvtnum(argv[optind]);
 337         if (offset < 0) {
 338                 printf("non-numeric length argument -- %s\n", argv[optind]);
 339                 return 0;
 340         }
 341
 342         optind++;
 343         count = cvtnum(argv[optind]);
 344         if (count < 0) {
 345                 printf("non-numeric length argument -- %s\n", argv[optind]);
 346                 return 0;
 347         }
 348
 349     if (!Pflag && (lflag || sflag)) {
 350         return command_usage(&read_cmd);
 351     }
 352
 353     if (!lflag) {
 354         pattern_count = count - pattern_offset;
 355     }
 356
 357     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 358         printf("pattern verfication range exceeds end of read data\n");
 359         return 0;
 360     }
 361
 362         if (!pflag)
 363                 if (offset & 0x1ff) {
 364                         printf("offset %lld is not sector aligned\n",
 365                                 (long long)offset);
 366                         return 0;
 367
 368                 if (count & 0x1ff) {
 369                         printf("count %d is not sector aligned\n",
 370                                 count);
 371                         return 0;
 372                 }
 373         }
 374
 375         buf = qemu_io_alloc(count, 0xab);
 376
 377         gettimeofday(&t1, NULL);
 378         if (pflag)
 379                 cnt = do_pread(buf, offset, count, &total);
 380         else if (bflag)
 381                 cnt = do_load_vmstate(buf, offset, count, &total);
 382         else
 383                 cnt = do_read(buf, offset, count, &total);
 384         gettimeofday(&t2, NULL);
 385
 386         if (cnt < 0) {
 387                 printf("read failed: %s\n", strerror(-cnt));
 388                 goto out;
 389         }
 390
 391         if (Pflag) {
 392                 void* cmp_buf = malloc(pattern_count);
 393                 memset(cmp_buf, pattern, pattern_count);
 394                 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 395                         printf("Pattern verification failed at offset %lld, "
 396                                 "%d bytes\n",
 397                                 (long long) offset + pattern_offset, pattern_count);
 398                 }
 399                 free(cmp_buf);
 400         }
 401
 402         if (qflag)
 403                 goto out;
 404
 405         if (vflag)
 406                 dump_buffer(buf, offset, count);
 407
 408         /* Finally, report back -- -C gives a parsable format */
 409         t2 = tsub(t2, t1);
 410         print_report("read", &t2, offset, count, total, cnt, Cflag);
 411
 412 out:
 413         qemu_io_free(buf);
 414
 415         return 0;
 416 }
 417
 418 static const cmdinfo_t read_cmd = {
 419         .name           = "read",
 420         .altname        = "r",
 421         .cfunc          = read_f,
 422         .argmin         = 2,
 423         .argmax         = -1,
 424         .args           = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
 425         .oneline        = "reads a number of bytes at a specified offset",
 426         .help           = read_help,
 427 };
 428
 429 static const cmdinfo_t readv_cmd;
 430
 431 static void
 432 readv_help(void)
 433 {
 434         printf(
 435 "\n"
 436 " reads a range of bytes from the given offset into multiple buffers\n"
 437 "\n"
 438 " Example:\n"
 439 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 440 "\n"
 441 " Reads a segment of the currently open file, optionally dumping it to the\n"
 442 " standard output stream (with -v option) for subsequent inspection.\n"
 443 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 444 " -C, -- report statistics in a machine parsable format\n"
 445 " -P, -- use a pattern to verify read data\n"
 446 " -v, -- dump buffer to standard output\n"
 447 " -q, -- quite mode, do not show I/O statistics\n"
 448 "\n");
 449 }
 450
 451 static int
 452 readv_f(int argc, char **argv)
 453 {
 454         struct timeval t1, t2;
 455         int Cflag = 0, qflag = 0, vflag = 0;
 456         int c, cnt;
 457         char *buf;
 458         int64_t offset;
 459         int total;
 460         int nr_iov;
 461         QEMUIOVector qiov;
 462         int pattern = 0;
 463         int Pflag = 0;
 464
 465         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 466                 switch (c) {
 467                 case 'C':
 468                         Cflag = 1;
 469                         break;
 470                 case 'P':
 471                         Pflag = 1;
 472                         pattern = atoi(optarg);
 473                         break;
 474                 case 'q':
 475                         qflag = 1;
 476                         break;
 477                 case 'v':
 478                         vflag = 1;
 479                         break;
 480                 default:
 481                         return command_usage(&readv_cmd);
 482                 }
 483         }
 484
 485         if (optind > argc - 2)
 486                 return command_usage(&readv_cmd);
 487
 488
 489         offset = cvtnum(argv[optind]);
 490         if (offset < 0) {
 491                 printf("non-numeric length argument -- %s\n", argv[optind]);
 492                 return 0;
 493         }
 494         optind++;
 495
 496         if (offset & 0x1ff) {
 497                 printf("offset %lld is not sector aligned\n",
 498                         (long long)offset);
 499                 return 0;
 500         }
 501
 502         nr_iov = argc - optind;
 503         buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
 504
 505         gettimeofday(&t1, NULL);
 506         cnt = do_aio_readv(&qiov, offset, &total);
 507         gettimeofday(&t2, NULL);
 508
 509         if (cnt < 0) {
 510                 printf("readv failed: %s\n", strerror(-cnt));
 511                 goto out;
 512         }
 513
 514         if (Pflag) {
 515                 void* cmp_buf = malloc(qiov.size);
 516                 memset(cmp_buf, pattern, qiov.size);
 517                 if (memcmp(buf, cmp_buf, qiov.size)) {
 518                         printf("Pattern verification failed at offset %lld, "
 519                                 "%zd bytes\n",
 520                                 (long long) offset, qiov.size);
 521                 }
 522                 free(cmp_buf);
 523         }
 524
 525         if (qflag)
 526                 goto out;
 527
 528         if (vflag)
 529                 dump_buffer(buf, offset, qiov.size);
 530
 531         /* Finally, report back -- -C gives a parsable format */
 532         t2 = tsub(t2, t1);
 533         print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 534
 535 out:
 536         qemu_io_free(buf);
 537         return 0;
 538 }
 539
 540 static const cmdinfo_t readv_cmd = {
 541         .name           = "readv",
 542         .cfunc          = readv_f,
 543         .argmin         = 2,
 544         .argmax         = -1,
 545         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 546         .oneline        = "reads a number of bytes at a specified offset",
 547         .help           = readv_help,
 548 };
 549
 550 static const cmdinfo_t write_cmd;
 551
 552 static void
 553 write_help(void)
 554 {
 555         printf(
 556 "\n"
 557 " writes a range of bytes from the given offset\n"
 558 "\n"
 559 " Example:\n"
 560 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 561 "\n"
 562 " Writes into a segment of the currently open file, using a buffer\n"
 563 " filled with a set pattern (0xcdcdcdcd).\n"
 564 " -b, -- write to the VM state rather than the virtual disk\n"
 565 " -p, -- use bdrv_pwrite to write the file\n"
 566 " -P, -- use different pattern to fill file\n"
 567 " -C, -- report statistics in a machine parsable format\n"
 568 " -q, -- quite mode, do not show I/O statistics\n"
 569 "\n");
 570 }
 571
 572 static int
 573 write_f(int argc, char **argv)
 574 {
 575         struct timeval t1, t2;
 576         int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
 577         int c, cnt;
 578         char *buf;
 579         int64_t offset;
 580         int count;
 581         /* Some compilers get confused and warn if this is not initialized.  */
 582         int total = 0;
 583         int pattern = 0xcd;
 584
 585         while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
 586                 switch (c) {
 587                 case 'b':
 588                         bflag = 1;
 589                         break;
 590                 case 'C':
 591                         Cflag = 1;
 592                         break;
 593                 case 'p':
 594                         pflag = 1;
 595                         break;
 596                 case 'P':
 597                         pattern = atoi(optarg);
 598                         break;
 599                 case 'q':
 600                         qflag = 1;
 601                         break;
 602                 default:
 603                         return command_usage(&write_cmd);
 604                 }
 605         }
 606
 607         if (optind != argc - 2)
 608                 return command_usage(&write_cmd);
 609
 610         if (bflag && pflag) {
 611                 printf("-b and -p cannot be specified at the same time\n");
 612                 return 0;
 613         }
 614
 615         offset = cvtnum(argv[optind]);
 616         if (offset < 0) {
 617                 printf("non-numeric length argument -- %s\n", argv[optind]);
 618                 return 0;
 619         }
 620
 621         optind++;
 622         count = cvtnum(argv[optind]);
 623         if (count < 0) {
 624                 printf("non-numeric length argument -- %s\n", argv[optind]);
 625                 return 0;
 626         }
 627
 628         if (!pflag) {
 629                 if (offset & 0x1ff) {
 630                         printf("offset %lld is not sector aligned\n",
 631                                 (long long)offset);
 632                         return 0;
 633                 }
 634
 635                 if (count & 0x1ff) {
 636                         printf("count %d is not sector aligned\n",
 637                                 count);
 638                         return 0;
 639                 }
 640         }
 641
 642         buf = qemu_io_alloc(count, pattern);
 643
 644         gettimeofday(&t1, NULL);
 645         if (pflag)
 646                 cnt = do_pwrite(buf, offset, count, &total);
 647         else if (bflag)
 648                 cnt = do_save_vmstate(buf, offset, count, &total);
 649         else
 650                 cnt = do_write(buf, offset, count, &total);
 651         gettimeofday(&t2, NULL);
 652
 653         if (cnt < 0) {
 654                 printf("write failed: %s\n", strerror(-cnt));
 655                 goto out;
 656         }
 657
 658         if (qflag)
 659                 goto out;
 660
 661         /* Finally, report back -- -C gives a parsable format */
 662         t2 = tsub(t2, t1);
 663         print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 664
 665 out:
 666         qemu_io_free(buf);
 667
 668         return 0;
 669 }
 670
 671 static const cmdinfo_t write_cmd = {
 672         .name           = "write",
 673         .altname        = "w",
 674         .cfunc          = write_f,
 675         .argmin         = 2,
 676         .argmax         = -1,
 677         .args           = "[-abCpq] [-P pattern ] off len",
 678         .oneline        = "writes a number of bytes at a specified offset",
 679         .help           = write_help,
 680 };
 681
 682 static const cmdinfo_t writev_cmd;
 683
 684 static void
 685 writev_help(void)
 686 {
 687         printf(
 688 "\n"
 689 " writes a range of bytes from the given offset source from multiple buffers\n"
 690 "\n"
 691 " Example:\n"
 692 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 693 "\n"
 694 " Writes into a segment of the currently open file, using a buffer\n"
 695 " filled with a set pattern (0xcdcdcdcd).\n"
 696 " -P, -- use different pattern to fill file\n"
 697 " -C, -- report statistics in a machine parsable format\n"
 698 " -q, -- quite mode, do not show I/O statistics\n"
 699 "\n");
 700 }
 701
 702 static int
 703 writev_f(int argc, char **argv)
 704 {
 705         struct timeval t1, t2;
 706         int Cflag = 0, qflag = 0;
 707         int c, cnt;
 708         char *buf;
 709         int64_t offset;
 710         int total;
 711         int nr_iov;
 712         int pattern = 0xcd;
 713         QEMUIOVector qiov;
 714
 715         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 716                 switch (c) {
 717                 case 'C':
 718                         Cflag = 1;
 719                         break;
 720                 case 'q':
 721                         qflag = 1;
 722                         break;
 723                 case 'P':
 724                         pattern = atoi(optarg);
 725                         break;
 726                 default:
 727                         return command_usage(&writev_cmd);
 728                 }
 729         }
 730
 731         if (optind > argc - 2)
 732                 return command_usage(&writev_cmd);
 733
 734         offset = cvtnum(argv[optind]);
 735         if (offset < 0) {
 736                 printf("non-numeric length argument -- %s\n", argv[optind]);
 737                 return 0;
 738         }
 739         optind++;
 740
 741         if (offset & 0x1ff) {
 742                 printf("offset %lld is not sector aligned\n",
 743                         (long long)offset);
 744                 return 0;
 745         }
 746
 747         nr_iov = argc - optind;
 748         buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
 749
 750         gettimeofday(&t1, NULL);
 751         cnt = do_aio_writev(&qiov, offset, &total);
 752         gettimeofday(&t2, NULL);
 753
 754         if (cnt < 0) {
 755                 printf("writev failed: %s\n", strerror(-cnt));
 756                 goto out;
 757         }
 758
 759         if (qflag)
 760                 goto out;
 761
 762         /* Finally, report back -- -C gives a parsable format */
 763         t2 = tsub(t2, t1);
 764         print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 765 out:
 766         qemu_io_free(buf);
 767         return 0;
 768 }
 769
 770 static const cmdinfo_t writev_cmd = {
 771         .name           = "writev",
 772         .cfunc          = writev_f,
 773         .argmin         = 2,
 774         .argmax         = -1,
 775         .args           = "[-Cq] [-P pattern ] off len [len..]",
 776         .oneline        = "writes a number of bytes at a specified offset",
 777         .help           = writev_help,
 778 };
 779
 780 struct aio_ctx {
 781         QEMUIOVector qiov;
 782         int64_t offset;
 783         char *buf;
 784         int qflag;
 785         int vflag;
 786         int Cflag;
 787         int Pflag;
 788         int pattern;
 789         struct timeval t1;
 790 };
 791
 792 static void
 793 aio_write_done(void *opaque, int ret)
 794 {
 795         struct aio_ctx *ctx = opaque;
 796         struct timeval t2;
 797
 798         gettimeofday(&t2, NULL);
 799
 800
 801         if (ret < 0) {
 802                 printf("aio_write failed: %s\n", strerror(-ret));
 803                 goto out;
 804         }
 805
 806         if (ctx->qflag) {
 807                 goto out;
 808         }
 809
 810         /* Finally, report back -- -C gives a parsable format */
 811         t2 = tsub(t2, ctx->t1);
 812         print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
 813                      ctx->qiov.size, 1, ctx->Cflag);
 814 out:
 815         qemu_io_free(ctx->buf);
 816         free(ctx);
 817 }
 818
 819 static const cmdinfo_t aio_read_cmd;
 820
 821 static void
 822 aio_read_done(void *opaque, int ret)
 823 {
 824         struct aio_ctx *ctx = opaque;
 825         struct timeval t2;
 826
 827         gettimeofday(&t2, NULL);
 828
 829         if (ret < 0) {
 830                 printf("readv failed: %s\n", strerror(-ret));
 831                 goto out;
 832         }
 833
 834         if (ctx->Pflag) {
 835                 void *cmp_buf = malloc(ctx->qiov.size);
 836
 837                 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
 838                 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
 839                         printf("Pattern verification failed at offset %lld, "
 840                                 "%zd bytes\n",
 841                                 (long long) ctx->offset, ctx->qiov.size);
 842                 }
 843                 free(cmp_buf);
 844         }
 845
 846         if (ctx->qflag) {
 847                 goto out;
 848         }
 849
 850         if (ctx->vflag) {
 851                 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
 852         }
 853
 854         /* Finally, report back -- -C gives a parsable format */
 855         t2 = tsub(t2, ctx->t1);
 856         print_report("read", &t2, ctx->offset, ctx->qiov.size,
 857                      ctx->qiov.size, 1, ctx->Cflag);
 858 out:
 859         qemu_io_free(ctx->buf);
 860         free(ctx);
 861 }
 862
 863 static void
 864 aio_read_help(void)
 865 {
 866         printf(
 867 "\n"
 868 " asynchronously reads a range of bytes from the given offset\n"
 869 "\n"
 870 " Example:\n"
 871 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 872 "\n"
 873 " Reads a segment of the currently open file, optionally dumping it to the\n"
 874 " standard output stream (with -v option) for subsequent inspection.\n"
 875 " The read is performed asynchronously and should the aio_flush command \n"
 876 " should be used to ensure all outstanding aio requests have been completed\n"
 877 " -C, -- report statistics in a machine parsable format\n"
 878 " -P, -- use a pattern to verify read data\n"
 879 " -v, -- dump buffer to standard output\n"
 880 " -q, -- quite mode, do not show I/O statistics\n"
 881 "\n");
 882 }
 883
 884 static int
 885 aio_read_f(int argc, char **argv)
 886 {
 887         int nr_iov, c;
 888         struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 889         BlockDriverAIOCB *acb;
 890
 891         while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 892                 switch (c) {
 893                 case 'C':
 894                         ctx->Cflag = 1;
 895                         break;
 896                 case 'P':
 897                         ctx->Pflag = 1;
 898                         ctx->pattern = atoi(optarg);
 899                         break;
 900                 case 'q':
 901                         ctx->qflag = 1;
 902                         break;
 903                 case 'v':
 904                         ctx->vflag = 1;
 905                         break;
 906                 default:
 907                         free(ctx);
 908                         return command_usage(&aio_read_cmd);
 909                 }
 910         }
 911
 912         if (optind > argc - 2) {
 913                 free(ctx);
 914                 return command_usage(&aio_read_cmd);
 915         }
 916
 917         ctx->offset = cvtnum(argv[optind]);
 918         if (ctx->offset < 0) {
 919                 printf("non-numeric length argument -- %s\n", argv[optind]);
 920                 free(ctx);
 921                 return 0;
 922         }
 923         optind++;
 924
 925         if (ctx->offset & 0x1ff) {
 926                 printf("offset %lld is not sector aligned\n",
 927                         (long long)ctx->offset);
 928                 free(ctx);
 929                 return 0;
 930         }
 931
 932         nr_iov = argc - optind;
 933         ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
 934
 935         gettimeofday(&ctx->t1, NULL);
 936         acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
 937                               ctx->qiov.size >> 9, aio_read_done, ctx);
 938         if (!acb) {
 939                 free(ctx->buf);
 940                 free(ctx);
 941                 return -EIO;
 942         }
 943
 944         return 0;
 945 }
 946
 947 static const cmdinfo_t aio_read_cmd = {
 948         .name           = "aio_read",
 949         .cfunc          = aio_read_f,
 950         .argmin         = 2,
 951         .argmax         = -1,
 952         .args           = "[-Cqv] [-P pattern ] off len [len..]",
 953         .oneline        = "asynchronously reads a number of bytes",
 954         .help           = aio_read_help,
 955 };
 956
 957 static const cmdinfo_t aio_write_cmd;
 958
 959 static void
 960 aio_write_help(void)
 961 {
 962         printf(
 963 "\n"
 964 " asynchronously writes a range of bytes from the given offset source \n"
 965 " from multiple buffers\n"
 966 "\n"
 967 " Example:\n"
 968 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 969 "\n"
 970 " Writes into a segment of the currently open file, using a buffer\n"
 971 " filled with a set pattern (0xcdcdcdcd).\n"
 972 " The write is performed asynchronously and should the aio_flush command \n"
 973 " should be used to ensure all outstanding aio requests have been completed\n"
 974 " -P, -- use different pattern to fill file\n"
 975 " -C, -- report statistics in a machine parsable format\n"
 976 " -q, -- quite mode, do not show I/O statistics\n"
 977 "\n");
 978 }
 979
 980
 981 static int
 982 aio_write_f(int argc, char **argv)
 983 {
 984         int nr_iov, c;
 985         int pattern = 0xcd;
 986         struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
 987         BlockDriverAIOCB *acb;
 988
 989         while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 990                 switch (c) {
 991                 case 'C':
 992                         ctx->Cflag = 1;
 993                         break;
 994                 case 'q':
 995                         ctx->qflag = 1;
 996                         break;
 997                 case 'P':
 998                         pattern = atoi(optarg);
 999                         break;
1000                 default:
1001                         free(ctx);
1002                         return command_usage(&aio_write_cmd);
1003                 }
1004         }
1005
1006         if (optind > argc - 2) {
1007                 free(ctx);
1008                 return command_usage(&aio_write_cmd);
1009         }
1010
1011         ctx->offset = cvtnum(argv[optind]);
1012         if (ctx->offset < 0) {
1013                 printf("non-numeric length argument -- %s\n", argv[optind]);
1014                 free(ctx);
1015                 return 0;
1016         }
1017         optind++;
1018
1019         if (ctx->offset & 0x1ff) {
1020                 printf("offset %lld is not sector aligned\n",
1021                         (long long)ctx->offset);
1022                 free(ctx);
1023                 return 0;
1024         }
1025
1026         nr_iov = argc - optind;
1027         ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
1028
1029         gettimeofday(&ctx->t1, NULL);
1030         acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
1031                               ctx->qiov.size >> 9, aio_write_done, ctx);
1032         if (!acb) {
1033                 free(ctx->buf);
1034                 free(ctx);
1035                 return -EIO;
1036         }
1037
1038         return 0;
1039 }
1040
1041 static const cmdinfo_t aio_write_cmd = {
1042         .name           = "aio_write",
1043         .cfunc          = aio_write_f,
1044         .argmin         = 2,
1045         .argmax         = -1,
1046         .args           = "[-Cq] [-P pattern ] off len [len..]",
1047         .oneline        = "asynchronously writes a number of bytes",
1048         .help           = aio_write_help,
1049 };
1050
1051 static int
1052 aio_flush_f(int argc, char **argv)
1053 {
1054         qemu_aio_flush();
1055         return 0;
1056 }
1057
1058 static const cmdinfo_t aio_flush_cmd = {
1059         .name           = "aio_flush",
1060         .cfunc          = aio_flush_f,
1061         .oneline        = "completes all outstanding aio requets"
1062 };
1063
1064 static int
1065 flush_f(int argc, char **argv)
1066 {
1067         bdrv_flush(bs);
1068         return 0;
1069 }
1070
1071 static const cmdinfo_t flush_cmd = {
1072         .name           = "flush",
1073         .altname        = "f",
1074         .cfunc          = flush_f,
1075         .oneline        = "flush all in-core file state to disk",
1076 };
1077
1078 static int
1079 truncate_f(int argc, char **argv)
1080 {
1081         int64_t offset;
1082         int ret;
1083
1084         offset = cvtnum(argv[1]);
1085         if (offset < 0) {
1086                 printf("non-numeric truncate argument -- %s\n", argv[1]);
1087                 return 0;
1088         }
1089
1090         ret = bdrv_truncate(bs, offset);
1091         if (ret < 0) {
1092                 printf("truncate: %s", strerror(ret));
1093                 return 0;
1094         }
1095
1096         return 0;
1097 }
1098
1099 static const cmdinfo_t truncate_cmd = {
1100         .name           = "truncate",
1101         .altname        = "t",
1102         .cfunc          = truncate_f,
1103         .argmin         = 1,
1104         .argmax         = 1,
1105         .args           = "off",
1106         .oneline        = "truncates the current file at the given offset",
1107 };
1108
1109 static int
1110 length_f(int argc, char **argv)
1111 {
1112         int64_t size;
1113         char s1[64];
1114
1115         size = bdrv_getlength(bs);
1116         if (size < 0) {
1117                 printf("getlength: %s", strerror(size));
1118                 return 0;
1119         }
1120
1121         cvtstr(size, s1, sizeof(s1));
1122         printf("%s\n", s1);
1123         return 0;
1124 }
1125
1126
1127 static const cmdinfo_t length_cmd = {
1128         .name           = "length",
1129         .altname        = "l",
1130         .cfunc          = length_f,
1131         .oneline        = "gets the length of the current file",
1132 };
1133
1134
1135 static int
1136 info_f(int argc, char **argv)
1137 {
1138         BlockDriverInfo bdi;
1139         char s1[64], s2[64];
1140         int ret;
1141
1142         if (bs->drv && bs->drv->format_name)
1143                 printf("format name: %s\n", bs->drv->format_name);
1144         if (bs->drv && bs->drv->protocol_name)
1145                 printf("format name: %s\n", bs->drv->protocol_name);
1146
1147         ret = bdrv_get_info(bs, &bdi);
1148         if (ret)
1149                 return 0;
1150
1151         cvtstr(bdi.cluster_size, s1, sizeof(s1));
1152         cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1153
1154         printf("cluster size: %s\n", s1);
1155         printf("vm state offset: %s\n", s2);
1156
1157         return 0;
1158 }
1159
1160
1161
1162 static const cmdinfo_t info_cmd = {
1163         .name           = "info",
1164         .altname        = "i",
1165         .cfunc          = info_f,
1166         .oneline        = "prints information about the current file",
1167 };
1168
1169 static int
1170 alloc_f(int argc, char **argv)
1171 {
1172         int64_t offset;
1173         int nb_sectors, remaining;
1174         char s1[64];
1175         int num, sum_alloc;
1176         int ret;
1177
1178         offset = cvtnum(argv[1]);
1179         if (offset & 0x1ff) {
1180                 printf("offset %lld is not sector aligned\n",
1181                         (long long)offset);
1182                 return 0;
1183         }
1184
1185         if (argc == 3)
1186                 nb_sectors = cvtnum(argv[2]);
1187         else
1188                 nb_sectors = 1;
1189
1190         remaining = nb_sectors;
1191         sum_alloc = 0;
1192         while (remaining) {
1193                 ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1194                 remaining -= num;
1195                 if (ret) {
1196                         sum_alloc += num;
1197                 }
1198         }
1199
1200         cvtstr(offset, s1, sizeof(s1));
1201
1202         if (nb_sectors == 1)
1203                 printf("sector allocated at offset %s\n", s1);
1204         else
1205                 printf("%d/%d sectors allocated at offset %s\n",
1206                         sum_alloc, nb_sectors, s1);
1207         return 0;
1208 }
1209
1210 static const cmdinfo_t alloc_cmd = {
1211         .name           = "alloc",
1212         .altname        = "a",
1213         .argmin         = 1,
1214         .argmax         = 2,
1215         .cfunc          = alloc_f,
1216         .args           = "off [sectors]",
1217         .oneline        = "checks if a sector is present in the file",
1218 };
1219
1220 static int
1221 close_f(int argc, char **argv)
1222 {
1223         bdrv_close(bs);
1224         bs = NULL;
1225         return 0;
1226 }
1227
1228 static const cmdinfo_t close_cmd = {
1229         .name           = "close",
1230         .altname        = "c",
1231         .cfunc          = close_f,
1232         .oneline        = "close the current open file",
1233 };
1234
1235 static int openfile(char *name, int flags, int growable)
1236 {
1237         if (bs) {
1238                 fprintf(stderr, "file open already, try 'help close'\n");
1239                 return 1;
1240         }
1241
1242         bs = bdrv_new("hda");
1243         if (!bs)
1244                 return 1;
1245
1246         if (growable) {
1247                 flags |= BDRV_O_FILE;
1248         }
1249
1250         if (bdrv_open(bs, name, flags) == -1) {
1251                 fprintf(stderr, "%s: can't open device %s\n", progname, name);
1252                 bs = NULL;
1253                 return 1;
1254         }
1255
1256         if (growable) {
1257                 bs->growable = 1;
1258         }
1259         return 0;
1260 }
1261
1262 static void
1263 open_help(void)
1264 {
1265         printf(
1266 "\n"
1267 " opens a new file in the requested mode\n"
1268 "\n"
1269 " Example:\n"
1270 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1271 "\n"
1272 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1273 " -C, -- create new file if it doesn't exist\n"
1274 " -r, -- open file read-only\n"
1275 " -s, -- use snapshot file\n"
1276 " -n, -- disable host cache\n"
1277 " -g, -- allow file to grow (only applies to protocols)"
1278 "\n");
1279 }
1280
1281 static const cmdinfo_t open_cmd;
1282
1283 static int
1284 open_f(int argc, char **argv)
1285 {
1286         int flags = 0;
1287         int readonly = 0;
1288         int growable = 0;
1289         int c;
1290
1291         while ((c = getopt(argc, argv, "snCrg")) != EOF) {
1292                 switch (c) {
1293                 case 's':
1294                         flags |= BDRV_O_SNAPSHOT;
1295                         break;
1296                 case 'n':
1297                         flags |= BDRV_O_NOCACHE;
1298                         break;
1299                 case 'C':
1300                         flags |= BDRV_O_CREAT;
1301                         break;
1302                 case 'r':
1303                         readonly = 1;
1304                         break;
1305                 case 'g':
1306                         growable = 1;
1307                         break;
1308                 default:
1309                         return command_usage(&open_cmd);
1310                 }
1311         }
1312
1313         if (readonly)
1314                 flags |= BDRV_O_RDONLY;
1315         else
1316                 flags |= BDRV_O_RDWR;
1317
1318         if (optind != argc - 1)
1319                 return command_usage(&open_cmd);
1320
1321         return openfile(argv[optind], flags, growable);
1322 }
1323
1324 static const cmdinfo_t open_cmd = {
1325         .name           = "open",
1326         .altname        = "o",
1327         .cfunc          = open_f,
1328         .argmin         = 1,
1329         .argmax         = -1,
1330         .flags          = CMD_NOFILE_OK,
1331         .args           = "[-Crsn] [path]",
1332         .oneline        = "open the file specified by path",
1333         .help           = open_help,
1334 };
1335
1336 static int
1337 init_args_command(
1338         int     index)
1339 {
1340         /* only one device allowed so far */
1341         if (index >= 1)
1342                 return 0;
1343         return ++index;
1344 }
1345
1346 static int
1347 init_check_command(
1348         const cmdinfo_t *ct)
1349 {
1350         if (ct->flags & CMD_FLAG_GLOBAL)
1351                 return 1;
1352         if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1353                 fprintf(stderr, "no file open, try 'help open'\n");
1354                 return 0;
1355         }
1356         return 1;
1357 }
1358
1359 static void usage(const char *name)
1360 {
1361         printf(
1362 "Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
1363 "QEMU Disk exerciser\n"
1364 "\n"
1365 "  -C, --create         create new file if it doesn't exist\n"
1366 "  -c, --cmd            command to execute\n"
1367 "  -r, --read-only      export read-only\n"
1368 "  -s, --snapshot       use snapshot file\n"
1369 "  -n, --nocache        disable host cache\n"
1370 "  -g, --growable       allow file to grow (only applies to protocols)\n"
1371 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1372 "  -h, --help           display this help and exit\n"
1373 "  -V, --version        output version information and exit\n"
1374 "\n",
1375         name);
1376 }
1377
1378
1379 int main(int argc, char **argv)
1380 {
1381         int readonly = 0;
1382         int growable = 0;
1383         const char *sopt = "hVc:Crsnmg";
1384         struct option lopt[] = {
1385                 { "help", 0, 0, 'h' },
1386                 { "version", 0, 0, 'V' },
1387                 { "offset", 1, 0, 'o' },
1388                 { "cmd", 1, 0, 'c' },
1389                 { "create", 0, 0, 'C' },
1390                 { "read-only", 0, 0, 'r' },
1391                 { "snapshot", 0, 0, 's' },
1392                 { "nocache", 0, 0, 'n' },
1393                 { "misalign", 0, 0, 'm' },
1394                 { "growable", 0, 0, 'g' },
1395                 { NULL, 0, 0, 0 }
1396         };
1397         int c;
1398         int opt_index = 0;
1399         int flags = 0;
1400
1401         progname = basename(argv[0]);
1402
1403         while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1404                 switch (c) {
1405                 case 's':
1406                         flags |= BDRV_O_SNAPSHOT;
1407                         break;
1408                 case 'n':
1409                         flags |= BDRV_O_NOCACHE;
1410                         break;
1411                 case 'c':
1412                         add_user_command(optarg);
1413                         break;
1414                 case 'C':
1415                         flags |= BDRV_O_CREAT;
1416                         break;
1417                 case 'r':
1418                         readonly = 1;
1419                         break;
1420                 case 'm':
1421                         misalign = 1;
1422                         break;
1423                 case 'g':
1424                         growable = 1;
1425                         break;
1426                 case 'V':
1427                         printf("%s version %s\n", progname, VERSION);
1428                         exit(0);
1429                 case 'h':
1430                         usage(progname);
1431                         exit(0);
1432                 default:
1433                         usage(progname);
1434                         exit(1);
1435                 }
1436         }
1437
1438         if ((argc - optind) > 1) {
1439                 usage(progname);
1440                 exit(1);
1441         }
1442
1443         bdrv_init();
1444
1445         /* initialize commands */
1446         quit_init();
1447         help_init();
1448         add_command(&open_cmd);
1449         add_command(&close_cmd);
1450         add_command(&read_cmd);
1451         add_command(&readv_cmd);
1452         add_command(&write_cmd);
1453         add_command(&writev_cmd);
1454         add_command(&aio_read_cmd);
1455         add_command(&aio_write_cmd);
1456         add_command(&aio_flush_cmd);
1457         add_command(&flush_cmd);
1458         add_command(&truncate_cmd);
1459         add_command(&length_cmd);
1460         add_command(&info_cmd);
1461         add_command(&alloc_cmd);
1462
1463         add_args_command(init_args_command);
1464         add_check_command(init_check_command);
1465
1466         /* open the device */
1467         if (readonly)
1468                 flags |= BDRV_O_RDONLY;
1469         else
1470                 flags |= BDRV_O_RDWR;
1471
1472         if ((argc - optind) == 1)
1473                 openfile(argv[optind], flags, growable);
1474         command_loop();
1475
1476         /*
1477          * Make sure all outstanding requests get flushed the program exits.
1478          */
1479         qemu_aio_flush();
1480
1481         if (bs)
1482                 bdrv_close(bs);
1483         return 0;
1484 }