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/time.h>
  11 #include <sys/types.h>
  12 #include <stdarg.h>
  13 #include <stdio.h>
  14 #include <getopt.h>
  15 #include <libgen.h>
  16
  17 #include "qemu-common.h"
  18 #include "block_int.h"
  19 #include "cmd.h"
  20
  21 #define VERSION "0.0.1"
  22
  23 #define CMD_NOFILE_OK   0x01
  24
  25 char *progname;
  26 static BlockDriverState *bs;
  27
  28 static int misalign;
  29
  30 /*
  31  * Parse the pattern argument to various sub-commands.
  32  *
  33  * Because the pattern is used as an argument to memset it must evaluate
  34  * to an unsigned integer that fits into a single byte.
  35  */
  36 static int parse_pattern(const char *arg)
  37 {
  38     char *endptr = NULL;
  39     long pattern;
  40
  41     pattern = strtol(arg, &endptr, 0);
  42     if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
  43         printf("%s is not a valid pattern byte\n", arg);
  44         return -1;
  45     }
  46
  47     return pattern;
  48 }
  49
  50 /*
  51  * Memory allocation helpers.
  52  *
  53  * Make sure memory is aligned by default, or purposefully misaligned if
  54  * that is specified on the command line.
  55  */
  56
  57 #define MISALIGN_OFFSET     16
  58 static void *qemu_io_alloc(size_t len, int pattern)
  59 {
  60     void *buf;
  61
  62     if (misalign) {
  63         len += MISALIGN_OFFSET;
  64     }
  65     buf = qemu_blockalign(bs, len);
  66     memset(buf, pattern, len);
  67     if (misalign) {
  68         buf += MISALIGN_OFFSET;
  69     }
  70     return buf;
  71 }
  72
  73 static void qemu_io_free(void *p)
  74 {
  75     if (misalign) {
  76         p -= MISALIGN_OFFSET;
  77     }
  78     qemu_vfree(p);
  79 }
  80
  81 static void dump_buffer(const void *buffer, int64_t offset, int len)
  82 {
  83     int i, j;
  84     const uint8_t *p;
  85
  86     for (i = 0, p = buffer; i < len; i += 16) {
  87         const uint8_t *s = p;
  88
  89         printf("%08" PRIx64 ":  ", offset + i);
  90         for (j = 0; j < 16 && i + j < len; j++, p++) {
  91             printf("%02x ", *p);
  92         }
  93         printf(" ");
  94         for (j = 0; j < 16 && i + j < len; j++, s++) {
  95             if (isalnum(*s)) {
  96                 printf("%c", *s);
  97             } else {
  98                 printf(".");
  99             }
 100         }
 101         printf("\n");
 102     }
 103 }
 104
 105 static void print_report(const char *op, struct timeval *t, int64_t offset,
 106                          int count, int total, int cnt, int Cflag)
 107 {
 108     char s1[64], s2[64], ts[64];
 109
 110     timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
 111     if (!Cflag) {
 112         cvtstr((double)total, s1, sizeof(s1));
 113         cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
 114         printf("%s %d/%d bytes at offset %" PRId64 "\n",
 115                op, total, count, offset);
 116         printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
 117                s1, cnt, ts, s2, tdiv((double)cnt, *t));
 118     } else {/* bytes,ops,time,bytes/sec,ops/sec */
 119         printf("%d,%d,%s,%.3f,%.3f\n",
 120             total, cnt, ts,
 121             tdiv((double)total, *t),
 122             tdiv((double)cnt, *t));
 123     }
 124 }
 125
 126 /*
 127  * Parse multiple length statements for vectored I/O, and construct an I/O
 128  * vector matching it.
 129  */
 130 static void *
 131 create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
 132 {
 133     size_t *sizes = calloc(nr_iov, sizeof(size_t));
 134     size_t count = 0;
 135     void *buf = NULL;
 136     void *p;
 137     int i;
 138
 139     for (i = 0; i < nr_iov; i++) {
 140         char *arg = argv[i];
 141         int64_t len;
 142
 143         len = cvtnum(arg);
 144         if (len < 0) {
 145             printf("non-numeric length argument -- %s\n", arg);
 146             goto fail;
 147         }
 148
 149         /* should be SIZE_T_MAX, but that doesn't exist */
 150         if (len > INT_MAX) {
 151             printf("too large length argument -- %s\n", arg);
 152             goto fail;
 153         }
 154
 155         if (len & 0x1ff) {
 156             printf("length argument %" PRId64
 157                    " is not sector aligned\n", len);
 158             goto fail;
 159         }
 160
 161         sizes[i] = len;
 162         count += len;
 163     }
 164
 165     qemu_iovec_init(qiov, nr_iov);
 166
 167     buf = p = qemu_io_alloc(count, pattern);
 168
 169     for (i = 0; i < nr_iov; i++) {
 170         qemu_iovec_add(qiov, p, sizes[i]);
 171         p += sizes[i];
 172     }
 173
 174 fail:
 175     free(sizes);
 176     return buf;
 177 }
 178
 179 static int do_read(char *buf, int64_t offset, int count, int *total)
 180 {
 181     int ret;
 182
 183     ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 184     if (ret < 0) {
 185         return ret;
 186     }
 187     *total = count;
 188     return 1;
 189 }
 190
 191 static int do_write(char *buf, int64_t offset, int count, int *total)
 192 {
 193     int ret;
 194
 195     ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 196     if (ret < 0) {
 197         return ret;
 198     }
 199     *total = count;
 200     return 1;
 201 }
 202
 203 static int do_pread(char *buf, int64_t offset, int count, int *total)
 204 {
 205     *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
 206     if (*total < 0) {
 207         return *total;
 208     }
 209     return 1;
 210 }
 211
 212 static int do_pwrite(char *buf, int64_t offset, int count, int *total)
 213 {
 214     *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
 215     if (*total < 0) {
 216         return *total;
 217     }
 218     return 1;
 219 }
 220
 221 static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
 222 {
 223     *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
 224     if (*total < 0) {
 225         return *total;
 226     }
 227     return 1;
 228 }
 229
 230 static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
 231 {
 232     *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
 233     if (*total < 0) {
 234         return *total;
 235     }
 236     return 1;
 237 }
 238
 239 #define NOT_DONE 0x7fffffff
 240 static void aio_rw_done(void *opaque, int ret)
 241 {
 242     *(int *)opaque = ret;
 243 }
 244
 245 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
 246 {
 247     BlockDriverAIOCB *acb;
 248     int async_ret = NOT_DONE;
 249
 250     acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
 251                          aio_rw_done, &async_ret);
 252     if (!acb) {
 253         return -EIO;
 254     }
 255     while (async_ret == NOT_DONE) {
 256         qemu_aio_wait();
 257     }
 258
 259     *total = qiov->size;
 260     return async_ret < 0 ? async_ret : 1;
 261 }
 262
 263 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
 264 {
 265     BlockDriverAIOCB *acb;
 266     int async_ret = NOT_DONE;
 267
 268     acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
 269                           aio_rw_done, &async_ret);
 270     if (!acb) {
 271         return -EIO;
 272     }
 273
 274     while (async_ret == NOT_DONE) {
 275         qemu_aio_wait();
 276     }
 277
 278     *total = qiov->size;
 279     return async_ret < 0 ? async_ret : 1;
 280 }
 281
 282 struct multiwrite_async_ret {
 283     int num_done;
 284     int error;
 285 };
 286
 287 static void multiwrite_cb(void *opaque, int ret)
 288 {
 289     struct multiwrite_async_ret *async_ret = opaque;
 290
 291     async_ret->num_done++;
 292     if (ret < 0) {
 293         async_ret->error = ret;
 294     }
 295 }
 296
 297 static int do_aio_multiwrite(BlockRequest* reqs, int num_reqs, int *total)
 298 {
 299     int i, ret;
 300     struct multiwrite_async_ret async_ret = {
 301         .num_done = 0,
 302         .error = 0,
 303     };
 304
 305     *total = 0;
 306     for (i = 0; i < num_reqs; i++) {
 307         reqs[i].cb = multiwrite_cb;
 308         reqs[i].opaque = &async_ret;
 309         *total += reqs[i].qiov->size;
 310     }
 311
 312     ret = bdrv_aio_multiwrite(bs, reqs, num_reqs);
 313     if (ret < 0) {
 314         return ret;
 315     }
 316
 317     while (async_ret.num_done < num_reqs) {
 318         qemu_aio_wait();
 319     }
 320
 321     return async_ret.error < 0 ? async_ret.error : 1;
 322 }
 323
 324 static void read_help(void)
 325 {
 326     printf(
 327 "\n"
 328 " reads a range of bytes from the given offset\n"
 329 "\n"
 330 " Example:\n"
 331 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
 332 "\n"
 333 " Reads a segment of the currently open file, optionally dumping it to the\n"
 334 " standard output stream (with -v option) for subsequent inspection.\n"
 335 " -b, -- read from the VM state rather than the virtual disk\n"
 336 " -C, -- report statistics in a machine parsable format\n"
 337 " -l, -- length for pattern verification (only with -P)\n"
 338 " -p, -- use bdrv_pread to read the file\n"
 339 " -P, -- use a pattern to verify read data\n"
 340 " -q, -- quiet mode, do not show I/O statistics\n"
 341 " -s, -- start offset for pattern verification (only with -P)\n"
 342 " -v, -- dump buffer to standard output\n"
 343 "\n");
 344 }
 345
 346 static int read_f(int argc, char **argv);
 347
 348 static const cmdinfo_t read_cmd = {
 349     .name       = "read",
 350     .altname    = "r",
 351     .cfunc      = read_f,
 352     .argmin     = 2,
 353     .argmax     = -1,
 354     .args       = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
 355     .oneline    = "reads a number of bytes at a specified offset",
 356     .help       = read_help,
 357 };
 358
 359 static int read_f(int argc, char **argv)
 360 {
 361     struct timeval t1, t2;
 362     int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 363     int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
 364     int c, cnt;
 365     char *buf;
 366     int64_t offset;
 367     int count;
 368     /* Some compilers get confused and warn if this is not initialized.  */
 369     int total = 0;
 370     int pattern = 0, pattern_offset = 0, pattern_count = 0;
 371
 372     while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
 373         switch (c) {
 374         case 'b':
 375             bflag = 1;
 376             break;
 377         case 'C':
 378             Cflag = 1;
 379             break;
 380         case 'l':
 381             lflag = 1;
 382             pattern_count = cvtnum(optarg);
 383             if (pattern_count < 0) {
 384                 printf("non-numeric length argument -- %s\n", optarg);
 385                 return 0;
 386             }
 387             break;
 388         case 'p':
 389             pflag = 1;
 390             break;
 391         case 'P':
 392             Pflag = 1;
 393             pattern = parse_pattern(optarg);
 394             if (pattern < 0) {
 395                 return 0;
 396             }
 397             break;
 398         case 'q':
 399             qflag = 1;
 400             break;
 401         case 's':
 402             sflag = 1;
 403             pattern_offset = cvtnum(optarg);
 404             if (pattern_offset < 0) {
 405                 printf("non-numeric length argument -- %s\n", optarg);
 406                 return 0;
 407             }
 408             break;
 409         case 'v':
 410             vflag = 1;
 411             break;
 412         default:
 413             return command_usage(&read_cmd);
 414         }
 415     }
 416
 417     if (optind != argc - 2) {
 418         return command_usage(&read_cmd);
 419     }
 420
 421     if (bflag && pflag) {
 422         printf("-b and -p cannot be specified at the same time\n");
 423         return 0;
 424     }
 425
 426     offset = cvtnum(argv[optind]);
 427     if (offset < 0) {
 428         printf("non-numeric length argument -- %s\n", argv[optind]);
 429         return 0;
 430     }
 431
 432     optind++;
 433     count = cvtnum(argv[optind]);
 434     if (count < 0) {
 435         printf("non-numeric length argument -- %s\n", argv[optind]);
 436         return 0;
 437     }
 438
 439     if (!Pflag && (lflag || sflag)) {
 440         return command_usage(&read_cmd);
 441     }
 442
 443     if (!lflag) {
 444         pattern_count = count - pattern_offset;
 445     }
 446
 447     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 448         printf("pattern verfication range exceeds end of read data\n");
 449         return 0;
 450     }
 451
 452     if (!pflag) {
 453         if (offset & 0x1ff) {
 454             printf("offset %" PRId64 " is not sector aligned\n",
 455                    offset);
 456             return 0;
 457         }
 458         if (count & 0x1ff) {
 459             printf("count %d is not sector aligned\n",
 460                    count);
 461             return 0;
 462         }
 463     }
 464
 465     buf = qemu_io_alloc(count, 0xab);
 466
 467     gettimeofday(&t1, NULL);
 468     if (pflag) {
 469         cnt = do_pread(buf, offset, count, &total);
 470     } else if (bflag) {
 471         cnt = do_load_vmstate(buf, offset, count, &total);
 472     } else {
 473         cnt = do_read(buf, offset, count, &total);
 474     }
 475     gettimeofday(&t2, NULL);
 476
 477     if (cnt < 0) {
 478         printf("read failed: %s\n", strerror(-cnt));
 479         goto out;
 480     }
 481
 482     if (Pflag) {
 483         void *cmp_buf = malloc(pattern_count);
 484         memset(cmp_buf, pattern, pattern_count);
 485         if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 486             printf("Pattern verification failed at offset %"
 487                    PRId64 ", %d bytes\n",
 488                    offset + pattern_offset, pattern_count);
 489         }
 490         free(cmp_buf);
 491     }
 492
 493     if (qflag) {
 494         goto out;
 495     }
 496
 497     if (vflag) {
 498         dump_buffer(buf, offset, count);
 499     }
 500
 501     /* Finally, report back -- -C gives a parsable format */
 502     t2 = tsub(t2, t1);
 503     print_report("read", &t2, offset, count, total, cnt, Cflag);
 504
 505 out:
 506     qemu_io_free(buf);
 507
 508     return 0;
 509 }
 510
 511 static void readv_help(void)
 512 {
 513     printf(
 514 "\n"
 515 " reads a range of bytes from the given offset into multiple buffers\n"
 516 "\n"
 517 " Example:\n"
 518 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 519 "\n"
 520 " Reads a segment of the currently open file, optionally dumping it to the\n"
 521 " standard output stream (with -v option) for subsequent inspection.\n"
 522 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 523 " -C, -- report statistics in a machine parsable format\n"
 524 " -P, -- use a pattern to verify read data\n"
 525 " -v, -- dump buffer to standard output\n"
 526 " -q, -- quiet mode, do not show I/O statistics\n"
 527 "\n");
 528 }
 529
 530 static int readv_f(int argc, char **argv);
 531
 532 static const cmdinfo_t readv_cmd = {
 533     .name       = "readv",
 534     .cfunc      = readv_f,
 535     .argmin     = 2,
 536     .argmax     = -1,
 537     .args       = "[-Cqv] [-P pattern ] off len [len..]",
 538     .oneline    = "reads a number of bytes at a specified offset",
 539     .help       = readv_help,
 540 };
 541
 542 static int readv_f(int argc, char **argv)
 543 {
 544     struct timeval t1, t2;
 545     int Cflag = 0, qflag = 0, vflag = 0;
 546     int c, cnt;
 547     char *buf;
 548     int64_t offset;
 549     /* Some compilers get confused and warn if this is not initialized.  */
 550     int total = 0;
 551     int nr_iov;
 552     QEMUIOVector qiov;
 553     int pattern = 0;
 554     int Pflag = 0;
 555
 556     while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 557         switch (c) {
 558         case 'C':
 559             Cflag = 1;
 560             break;
 561         case 'P':
 562             Pflag = 1;
 563             pattern = parse_pattern(optarg);
 564             if (pattern < 0) {
 565                 return 0;
 566             }
 567             break;
 568         case 'q':
 569             qflag = 1;
 570             break;
 571         case 'v':
 572             vflag = 1;
 573             break;
 574         default:
 575             return command_usage(&readv_cmd);
 576         }
 577     }
 578
 579     if (optind > argc - 2) {
 580         return command_usage(&readv_cmd);
 581     }
 582
 583
 584     offset = cvtnum(argv[optind]);
 585     if (offset < 0) {
 586         printf("non-numeric length argument -- %s\n", argv[optind]);
 587         return 0;
 588     }
 589     optind++;
 590
 591     if (offset & 0x1ff) {
 592         printf("offset %" PRId64 " is not sector aligned\n",
 593                offset);
 594         return 0;
 595     }
 596
 597     nr_iov = argc - optind;
 598     buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
 599
 600     gettimeofday(&t1, NULL);
 601     cnt = do_aio_readv(&qiov, offset, &total);
 602     gettimeofday(&t2, NULL);
 603
 604     if (cnt < 0) {
 605         printf("readv failed: %s\n", strerror(-cnt));
 606         goto out;
 607     }
 608
 609     if (Pflag) {
 610         void *cmp_buf = malloc(qiov.size);
 611         memset(cmp_buf, pattern, qiov.size);
 612         if (memcmp(buf, cmp_buf, qiov.size)) {
 613             printf("Pattern verification failed at offset %"
 614                    PRId64 ", %zd bytes\n", offset, qiov.size);
 615         }
 616         free(cmp_buf);
 617     }
 618
 619     if (qflag) {
 620         goto out;
 621     }
 622
 623     if (vflag) {
 624         dump_buffer(buf, offset, qiov.size);
 625     }
 626
 627     /* Finally, report back -- -C gives a parsable format */
 628     t2 = tsub(t2, t1);
 629     print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 630
 631 out:
 632     qemu_io_free(buf);
 633     return 0;
 634 }
 635
 636 static void write_help(void)
 637 {
 638     printf(
 639 "\n"
 640 " writes a range of bytes from the given offset\n"
 641 "\n"
 642 " Example:\n"
 643 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 644 "\n"
 645 " Writes into a segment of the currently open file, using a buffer\n"
 646 " filled with a set pattern (0xcdcdcdcd).\n"
 647 " -b, -- write to the VM state rather than the virtual disk\n"
 648 " -p, -- use bdrv_pwrite to write the file\n"
 649 " -P, -- use different pattern to fill file\n"
 650 " -C, -- report statistics in a machine parsable format\n"
 651 " -q, -- quiet mode, do not show I/O statistics\n"
 652 "\n");
 653 }
 654
 655 static int write_f(int argc, char **argv);
 656
 657 static const cmdinfo_t write_cmd = {
 658     .name       = "write",
 659     .altname    = "w",
 660     .cfunc      = write_f,
 661     .argmin     = 2,
 662     .argmax     = -1,
 663     .args       = "[-abCpq] [-P pattern ] off len",
 664     .oneline    = "writes a number of bytes at a specified offset",
 665     .help       = write_help,
 666 };
 667
 668 static int write_f(int argc, char **argv)
 669 {
 670     struct timeval t1, t2;
 671     int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
 672     int c, cnt;
 673     char *buf;
 674     int64_t offset;
 675     int count;
 676     /* Some compilers get confused and warn if this is not initialized.  */
 677     int total = 0;
 678     int pattern = 0xcd;
 679
 680     while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
 681         switch (c) {
 682         case 'b':
 683             bflag = 1;
 684             break;
 685         case 'C':
 686             Cflag = 1;
 687             break;
 688         case 'p':
 689             pflag = 1;
 690             break;
 691         case 'P':
 692             pattern = parse_pattern(optarg);
 693             if (pattern < 0) {
 694                 return 0;
 695             }
 696             break;
 697         case 'q':
 698             qflag = 1;
 699             break;
 700         default:
 701             return command_usage(&write_cmd);
 702         }
 703     }
 704
 705     if (optind != argc - 2) {
 706         return command_usage(&write_cmd);
 707     }
 708
 709     if (bflag && pflag) {
 710         printf("-b and -p cannot be specified at the same time\n");
 711         return 0;
 712     }
 713
 714     offset = cvtnum(argv[optind]);
 715     if (offset < 0) {
 716         printf("non-numeric length argument -- %s\n", argv[optind]);
 717         return 0;
 718     }
 719
 720     optind++;
 721     count = cvtnum(argv[optind]);
 722     if (count < 0) {
 723         printf("non-numeric length argument -- %s\n", argv[optind]);
 724         return 0;
 725     }
 726
 727     if (!pflag) {
 728         if (offset & 0x1ff) {
 729             printf("offset %" PRId64 " is not sector aligned\n",
 730                    offset);
 731             return 0;
 732         }
 733
 734         if (count & 0x1ff) {
 735             printf("count %d is not sector aligned\n",
 736                    count);
 737             return 0;
 738         }
 739     }
 740
 741     buf = qemu_io_alloc(count, pattern);
 742
 743     gettimeofday(&t1, NULL);
 744     if (pflag) {
 745         cnt = do_pwrite(buf, offset, count, &total);
 746     } else if (bflag) {
 747         cnt = do_save_vmstate(buf, offset, count, &total);
 748     } else {
 749         cnt = do_write(buf, offset, count, &total);
 750     }
 751     gettimeofday(&t2, NULL);
 752
 753     if (cnt < 0) {
 754         printf("write failed: %s\n", strerror(-cnt));
 755         goto out;
 756     }
 757
 758     if (qflag) {
 759         goto out;
 760     }
 761
 762     /* Finally, report back -- -C gives a parsable format */
 763     t2 = tsub(t2, t1);
 764     print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 765
 766 out:
 767     qemu_io_free(buf);
 768
 769     return 0;
 770 }
 771
 772 static void
 773 writev_help(void)
 774 {
 775     printf(
 776 "\n"
 777 " writes a range of bytes from the given offset source from multiple buffers\n"
 778 "\n"
 779 " Example:\n"
 780 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 781 "\n"
 782 " Writes into a segment of the currently open file, using a buffer\n"
 783 " filled with a set pattern (0xcdcdcdcd).\n"
 784 " -P, -- use different pattern to fill file\n"
 785 " -C, -- report statistics in a machine parsable format\n"
 786 " -q, -- quiet mode, do not show I/O statistics\n"
 787 "\n");
 788 }
 789
 790 static int writev_f(int argc, char **argv);
 791
 792 static const cmdinfo_t writev_cmd = {
 793     .name       = "writev",
 794     .cfunc      = writev_f,
 795     .argmin     = 2,
 796     .argmax     = -1,
 797     .args       = "[-Cq] [-P pattern ] off len [len..]",
 798     .oneline    = "writes a number of bytes at a specified offset",
 799     .help       = writev_help,
 800 };
 801
 802 static int writev_f(int argc, char **argv)
 803 {
 804     struct timeval t1, t2;
 805     int Cflag = 0, qflag = 0;
 806     int c, cnt;
 807     char *buf;
 808     int64_t offset;
 809     /* Some compilers get confused and warn if this is not initialized.  */
 810     int total = 0;
 811     int nr_iov;
 812     int pattern = 0xcd;
 813     QEMUIOVector qiov;
 814
 815     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 816         switch (c) {
 817         case 'C':
 818             Cflag = 1;
 819             break;
 820         case 'q':
 821             qflag = 1;
 822             break;
 823         case 'P':
 824             pattern = parse_pattern(optarg);
 825             if (pattern < 0) {
 826                 return 0;
 827             }
 828             break;
 829         default:
 830             return command_usage(&writev_cmd);
 831         }
 832     }
 833
 834     if (optind > argc - 2) {
 835         return command_usage(&writev_cmd);
 836     }
 837
 838     offset = cvtnum(argv[optind]);
 839     if (offset < 0) {
 840         printf("non-numeric length argument -- %s\n", argv[optind]);
 841         return 0;
 842     }
 843     optind++;
 844
 845     if (offset & 0x1ff) {
 846         printf("offset %" PRId64 " is not sector aligned\n",
 847                offset);
 848         return 0;
 849     }
 850
 851     nr_iov = argc - optind;
 852     buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
 853
 854     gettimeofday(&t1, NULL);
 855     cnt = do_aio_writev(&qiov, offset, &total);
 856     gettimeofday(&t2, NULL);
 857
 858     if (cnt < 0) {
 859         printf("writev failed: %s\n", strerror(-cnt));
 860         goto out;
 861     }
 862
 863     if (qflag) {
 864         goto out;
 865     }
 866
 867     /* Finally, report back -- -C gives a parsable format */
 868     t2 = tsub(t2, t1);
 869     print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 870 out:
 871     qemu_io_free(buf);
 872     return 0;
 873 }
 874
 875 static void multiwrite_help(void)
 876 {
 877     printf(
 878 "\n"
 879 " writes a range of bytes from the given offset source from multiple buffers,\n"
 880 " in a batch of requests that may be merged by qemu\n"
 881 "\n"
 882 " Example:\n"
 883 " 'multiwrite 512 1k 1k ; 4k 1k' \n"
 884 "  writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
 885 "\n"
 886 " Writes into a segment of the currently open file, using a buffer\n"
 887 " filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
 888 " by one for each request contained in the multiwrite command.\n"
 889 " -P, -- use different pattern to fill file\n"
 890 " -C, -- report statistics in a machine parsable format\n"
 891 " -q, -- quiet mode, do not show I/O statistics\n"
 892 "\n");
 893 }
 894
 895 static int multiwrite_f(int argc, char **argv);
 896
 897 static const cmdinfo_t multiwrite_cmd = {
 898     .name       = "multiwrite",
 899     .cfunc      = multiwrite_f,
 900     .argmin     = 2,
 901     .argmax     = -1,
 902     .args       = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
 903     .oneline    = "issues multiple write requests at once",
 904     .help       = multiwrite_help,
 905 };
 906
 907 static int multiwrite_f(int argc, char **argv)
 908 {
 909     struct timeval t1, t2;
 910     int Cflag = 0, qflag = 0;
 911     int c, cnt;
 912     char **buf;
 913     int64_t offset, first_offset = 0;
 914     /* Some compilers get confused and warn if this is not initialized.  */
 915     int total = 0;
 916     int nr_iov;
 917     int nr_reqs;
 918     int pattern = 0xcd;
 919     QEMUIOVector *qiovs;
 920     int i;
 921     BlockRequest *reqs;
 922
 923     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 924         switch (c) {
 925         case 'C':
 926             Cflag = 1;
 927             break;
 928         case 'q':
 929             qflag = 1;
 930             break;
 931         case 'P':
 932             pattern = parse_pattern(optarg);
 933             if (pattern < 0) {
 934                 return 0;
 935             }
 936             break;
 937         default:
 938             return command_usage(&writev_cmd);
 939         }
 940     }
 941
 942     if (optind > argc - 2) {
 943         return command_usage(&writev_cmd);
 944     }
 945
 946     nr_reqs = 1;
 947     for (i = optind; i < argc; i++) {
 948         if (!strcmp(argv[i], ";")) {
 949             nr_reqs++;
 950         }
 951     }
 952
 953     reqs = g_malloc(nr_reqs * sizeof(*reqs));
 954     buf = g_malloc(nr_reqs * sizeof(*buf));
 955     qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
 956
 957     for (i = 0; i < nr_reqs; i++) {
 958         int j;
 959
 960         /* Read the offset of the request */
 961         offset = cvtnum(argv[optind]);
 962         if (offset < 0) {
 963             printf("non-numeric offset argument -- %s\n", argv[optind]);
 964             return 0;
 965         }
 966         optind++;
 967
 968         if (offset & 0x1ff) {
 969             printf("offset %lld is not sector aligned\n",
 970                    (long long)offset);
 971             return 0;
 972         }
 973
 974         if (i == 0) {
 975             first_offset = offset;
 976         }
 977
 978         /* Read lengths for qiov entries */
 979         for (j = optind; j < argc; j++) {
 980             if (!strcmp(argv[j], ";")) {
 981                 break;
 982             }
 983         }
 984
 985         nr_iov = j - optind;
 986
 987         /* Build request */
 988         reqs[i].qiov = &qiovs[i];
 989         buf[i] = create_iovec(reqs[i].qiov, &argv[optind], nr_iov, pattern);
 990         reqs[i].sector = offset >> 9;
 991         reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
 992
 993         optind = j + 1;
 994
 995         offset += reqs[i].qiov->size;
 996         pattern++;
 997     }
 998
 999     gettimeofday(&t1, NULL);
1000     cnt = do_aio_multiwrite(reqs, nr_reqs, &total);
1001     gettimeofday(&t2, NULL);
1002
1003     if (cnt < 0) {
1004         printf("aio_multiwrite failed: %s\n", strerror(-cnt));
1005         goto out;
1006     }
1007
1008     if (qflag) {
1009         goto out;
1010     }
1011
1012     /* Finally, report back -- -C gives a parsable format */
1013     t2 = tsub(t2, t1);
1014     print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
1015 out:
1016     for (i = 0; i < nr_reqs; i++) {
1017         qemu_io_free(buf[i]);
1018         qemu_iovec_destroy(&qiovs[i]);
1019     }
1020     g_free(buf);
1021     g_free(reqs);
1022     g_free(qiovs);
1023     return 0;
1024 }
1025
1026 struct aio_ctx {
1027     QEMUIOVector qiov;
1028     int64_t offset;
1029     char *buf;
1030     int qflag;
1031     int vflag;
1032     int Cflag;
1033     int Pflag;
1034     int pattern;
1035     struct timeval t1;
1036 };
1037
1038 static void aio_write_done(void *opaque, int ret)
1039 {
1040     struct aio_ctx *ctx = opaque;
1041     struct timeval t2;
1042
1043     gettimeofday(&t2, NULL);
1044
1045
1046     if (ret < 0) {
1047         printf("aio_write failed: %s\n", strerror(-ret));
1048         goto out;
1049     }
1050
1051     if (ctx->qflag) {
1052         goto out;
1053     }
1054
1055     /* Finally, report back -- -C gives a parsable format */
1056     t2 = tsub(t2, ctx->t1);
1057     print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1058                  ctx->qiov.size, 1, ctx->Cflag);
1059 out:
1060     qemu_io_free(ctx->buf);
1061     free(ctx);
1062 }
1063
1064 static void aio_read_done(void *opaque, int ret)
1065 {
1066     struct aio_ctx *ctx = opaque;
1067     struct timeval t2;
1068
1069     gettimeofday(&t2, NULL);
1070
1071     if (ret < 0) {
1072         printf("readv failed: %s\n", strerror(-ret));
1073         goto out;
1074     }
1075
1076     if (ctx->Pflag) {
1077         void *cmp_buf = malloc(ctx->qiov.size);
1078
1079         memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1080         if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1081             printf("Pattern verification failed at offset %"
1082                    PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
1083         }
1084         free(cmp_buf);
1085     }
1086
1087     if (ctx->qflag) {
1088         goto out;
1089     }
1090
1091     if (ctx->vflag) {
1092         dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1093     }
1094
1095     /* Finally, report back -- -C gives a parsable format */
1096     t2 = tsub(t2, ctx->t1);
1097     print_report("read", &t2, ctx->offset, ctx->qiov.size,
1098                  ctx->qiov.size, 1, ctx->Cflag);
1099 out:
1100     qemu_io_free(ctx->buf);
1101     free(ctx);
1102 }
1103
1104 static void aio_read_help(void)
1105 {
1106     printf(
1107 "\n"
1108 " asynchronously reads a range of bytes from the given offset\n"
1109 "\n"
1110 " Example:\n"
1111 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1112 "\n"
1113 " Reads a segment of the currently open file, optionally dumping it to the\n"
1114 " standard output stream (with -v option) for subsequent inspection.\n"
1115 " The read is performed asynchronously and the aio_flush command must be\n"
1116 " used to ensure all outstanding aio requests have been completed\n"
1117 " -C, -- report statistics in a machine parsable format\n"
1118 " -P, -- use a pattern to verify read data\n"
1119 " -v, -- dump buffer to standard output\n"
1120 " -q, -- quiet mode, do not show I/O statistics\n"
1121 "\n");
1122 }
1123
1124 static int aio_read_f(int argc, char **argv);
1125
1126 static const cmdinfo_t aio_read_cmd = {
1127     .name       = "aio_read",
1128     .cfunc      = aio_read_f,
1129     .argmin     = 2,
1130     .argmax     = -1,
1131     .args       = "[-Cqv] [-P pattern ] off len [len..]",
1132     .oneline    = "asynchronously reads a number of bytes",
1133     .help       = aio_read_help,
1134 };
1135
1136 static int aio_read_f(int argc, char **argv)
1137 {
1138     int nr_iov, c;
1139     struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
1140     BlockDriverAIOCB *acb;
1141
1142     while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
1143         switch (c) {
1144         case 'C':
1145             ctx->Cflag = 1;
1146             break;
1147         case 'P':
1148             ctx->Pflag = 1;
1149             ctx->pattern = parse_pattern(optarg);
1150             if (ctx->pattern < 0) {
1151                 free(ctx);
1152                 return 0;
1153             }
1154             break;
1155         case 'q':
1156             ctx->qflag = 1;
1157             break;
1158         case 'v':
1159             ctx->vflag = 1;
1160             break;
1161         default:
1162             free(ctx);
1163             return command_usage(&aio_read_cmd);
1164         }
1165     }
1166
1167     if (optind > argc - 2) {
1168         free(ctx);
1169         return command_usage(&aio_read_cmd);
1170     }
1171
1172     ctx->offset = cvtnum(argv[optind]);
1173     if (ctx->offset < 0) {
1174         printf("non-numeric length argument -- %s\n", argv[optind]);
1175         free(ctx);
1176         return 0;
1177     }
1178     optind++;
1179
1180     if (ctx->offset & 0x1ff) {
1181         printf("offset %" PRId64 " is not sector aligned\n",
1182                ctx->offset);
1183         free(ctx);
1184         return 0;
1185     }
1186
1187     nr_iov = argc - optind;
1188     ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
1189
1190     gettimeofday(&ctx->t1, NULL);
1191     acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
1192                          ctx->qiov.size >> 9, aio_read_done, ctx);
1193     if (!acb) {
1194         free(ctx->buf);
1195         free(ctx);
1196         return -EIO;
1197     }
1198
1199     return 0;
1200 }
1201
1202 static void aio_write_help(void)
1203 {
1204     printf(
1205 "\n"
1206 " asynchronously writes a range of bytes from the given offset source\n"
1207 " from multiple buffers\n"
1208 "\n"
1209 " Example:\n"
1210 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1211 "\n"
1212 " Writes into a segment of the currently open file, using a buffer\n"
1213 " filled with a set pattern (0xcdcdcdcd).\n"
1214 " The write is performed asynchronously and the aio_flush command must be\n"
1215 " used to ensure all outstanding aio requests have been completed\n"
1216 " -P, -- use different pattern to fill file\n"
1217 " -C, -- report statistics in a machine parsable format\n"
1218 " -q, -- quiet mode, do not show I/O statistics\n"
1219 "\n");
1220 }
1221
1222 static int aio_write_f(int argc, char **argv);
1223
1224 static const cmdinfo_t aio_write_cmd = {
1225     .name       = "aio_write",
1226     .cfunc      = aio_write_f,
1227     .argmin     = 2,
1228     .argmax     = -1,
1229     .args       = "[-Cq] [-P pattern ] off len [len..]",
1230     .oneline    = "asynchronously writes a number of bytes",
1231     .help       = aio_write_help,
1232 };
1233
1234 static int aio_write_f(int argc, char **argv)
1235 {
1236     int nr_iov, c;
1237     int pattern = 0xcd;
1238     struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
1239     BlockDriverAIOCB *acb;
1240
1241     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1242         switch (c) {
1243         case 'C':
1244             ctx->Cflag = 1;
1245             break;
1246         case 'q':
1247             ctx->qflag = 1;
1248             break;
1249         case 'P':
1250             pattern = parse_pattern(optarg);
1251             if (pattern < 0) {
1252                 return 0;
1253             }
1254             break;
1255         default:
1256             free(ctx);
1257             return command_usage(&aio_write_cmd);
1258         }
1259     }
1260
1261     if (optind > argc - 2) {
1262         free(ctx);
1263         return command_usage(&aio_write_cmd);
1264     }
1265
1266     ctx->offset = cvtnum(argv[optind]);
1267     if (ctx->offset < 0) {
1268         printf("non-numeric length argument -- %s\n", argv[optind]);
1269         free(ctx);
1270         return 0;
1271     }
1272     optind++;
1273
1274     if (ctx->offset & 0x1ff) {
1275         printf("offset %" PRId64 " is not sector aligned\n",
1276                ctx->offset);
1277         free(ctx);
1278         return 0;
1279     }
1280
1281     nr_iov = argc - optind;
1282     ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
1283
1284     gettimeofday(&ctx->t1, NULL);
1285     acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
1286                           ctx->qiov.size >> 9, aio_write_done, ctx);
1287     if (!acb) {
1288         free(ctx->buf);
1289         free(ctx);
1290         return -EIO;
1291     }
1292
1293     return 0;
1294 }
1295
1296 static int aio_flush_f(int argc, char **argv)
1297 {
1298     qemu_aio_flush();
1299     return 0;
1300 }
1301
1302 static const cmdinfo_t aio_flush_cmd = {
1303     .name       = "aio_flush",
1304     .cfunc      = aio_flush_f,
1305     .oneline    = "completes all outstanding aio requests"
1306 };
1307
1308 static int flush_f(int argc, char **argv)
1309 {
1310     bdrv_flush(bs);
1311     return 0;
1312 }
1313
1314 static const cmdinfo_t flush_cmd = {
1315     .name       = "flush",
1316     .altname    = "f",
1317     .cfunc      = flush_f,
1318     .oneline    = "flush all in-core file state to disk",
1319 };
1320
1321 static int truncate_f(int argc, char **argv)
1322 {
1323     int64_t offset;
1324     int ret;
1325
1326     offset = cvtnum(argv[1]);
1327     if (offset < 0) {
1328         printf("non-numeric truncate argument -- %s\n", argv[1]);
1329         return 0;
1330     }
1331
1332     ret = bdrv_truncate(bs, offset);
1333     if (ret < 0) {
1334         printf("truncate: %s\n", strerror(-ret));
1335         return 0;
1336     }
1337
1338     return 0;
1339 }
1340
1341 static const cmdinfo_t truncate_cmd = {
1342     .name       = "truncate",
1343     .altname    = "t",
1344     .cfunc      = truncate_f,
1345     .argmin     = 1,
1346     .argmax     = 1,
1347     .args       = "off",
1348     .oneline    = "truncates the current file at the given offset",
1349 };
1350
1351 static int length_f(int argc, char **argv)
1352 {
1353     int64_t size;
1354     char s1[64];
1355
1356     size = bdrv_getlength(bs);
1357     if (size < 0) {
1358         printf("getlength: %s\n", strerror(-size));
1359         return 0;
1360     }
1361
1362     cvtstr(size, s1, sizeof(s1));
1363     printf("%s\n", s1);
1364     return 0;
1365 }
1366
1367
1368 static const cmdinfo_t length_cmd = {
1369     .name   = "length",
1370     .altname    = "l",
1371     .cfunc      = length_f,
1372     .oneline    = "gets the length of the current file",
1373 };
1374
1375
1376 static int info_f(int argc, char **argv)
1377 {
1378     BlockDriverInfo bdi;
1379     char s1[64], s2[64];
1380     int ret;
1381
1382     if (bs->drv && bs->drv->format_name) {
1383         printf("format name: %s\n", bs->drv->format_name);
1384     }
1385     if (bs->drv && bs->drv->protocol_name) {
1386         printf("format name: %s\n", bs->drv->protocol_name);
1387     }
1388
1389     ret = bdrv_get_info(bs, &bdi);
1390     if (ret) {
1391         return 0;
1392     }
1393
1394     cvtstr(bdi.cluster_size, s1, sizeof(s1));
1395     cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1396
1397     printf("cluster size: %s\n", s1);
1398     printf("vm state offset: %s\n", s2);
1399
1400     return 0;
1401 }
1402
1403
1404
1405 static const cmdinfo_t info_cmd = {
1406     .name       = "info",
1407     .altname    = "i",
1408     .cfunc      = info_f,
1409     .oneline    = "prints information about the current file",
1410 };
1411
1412 static void discard_help(void)
1413 {
1414     printf(
1415 "\n"
1416 " discards a range of bytes from the given offset\n"
1417 "\n"
1418 " Example:\n"
1419 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1420 "\n"
1421 " Discards a segment of the currently open file.\n"
1422 " -C, -- report statistics in a machine parsable format\n"
1423 " -q, -- quiet mode, do not show I/O statistics\n"
1424 "\n");
1425 }
1426
1427 static int discard_f(int argc, char **argv);
1428
1429 static const cmdinfo_t discard_cmd = {
1430     .name       = "discard",
1431     .altname    = "d",
1432     .cfunc      = discard_f,
1433     .argmin     = 2,
1434     .argmax     = -1,
1435     .args       = "[-Cq] off len",
1436     .oneline    = "discards a number of bytes at a specified offset",
1437     .help       = discard_help,
1438 };
1439
1440 static int discard_f(int argc, char **argv)
1441 {
1442     struct timeval t1, t2;
1443     int Cflag = 0, qflag = 0;
1444     int c, ret;
1445     int64_t offset;
1446     int count;
1447
1448     while ((c = getopt(argc, argv, "Cq")) != EOF) {
1449         switch (c) {
1450         case 'C':
1451             Cflag = 1;
1452             break;
1453         case 'q':
1454             qflag = 1;
1455             break;
1456         default:
1457             return command_usage(&discard_cmd);
1458         }
1459     }
1460
1461     if (optind != argc - 2) {
1462         return command_usage(&discard_cmd);
1463     }
1464
1465     offset = cvtnum(argv[optind]);
1466     if (offset < 0) {
1467         printf("non-numeric length argument -- %s\n", argv[optind]);
1468         return 0;
1469     }
1470
1471     optind++;
1472     count = cvtnum(argv[optind]);
1473     if (count < 0) {
1474         printf("non-numeric length argument -- %s\n", argv[optind]);
1475         return 0;
1476     }
1477
1478     gettimeofday(&t1, NULL);
1479     ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
1480                        count >> BDRV_SECTOR_BITS);
1481     gettimeofday(&t2, NULL);
1482
1483     if (ret < 0) {
1484         printf("discard failed: %s\n", strerror(-ret));
1485         goto out;
1486     }
1487
1488     /* Finally, report back -- -C gives a parsable format */
1489     if (!qflag) {
1490         t2 = tsub(t2, t1);
1491         print_report("discard", &t2, offset, count, count, 1, Cflag);
1492     }
1493
1494 out:
1495     return 0;
1496 }
1497
1498 static int alloc_f(int argc, char **argv)
1499 {
1500     int64_t offset;
1501     int nb_sectors, remaining;
1502     char s1[64];
1503     int num, sum_alloc;
1504     int ret;
1505
1506     offset = cvtnum(argv[1]);
1507     if (offset & 0x1ff) {
1508         printf("offset %" PRId64 " is not sector aligned\n",
1509                offset);
1510         return 0;
1511     }
1512
1513     if (argc == 3) {
1514         nb_sectors = cvtnum(argv[2]);
1515     } else {
1516         nb_sectors = 1;
1517     }
1518
1519     remaining = nb_sectors;
1520     sum_alloc = 0;
1521     while (remaining) {
1522         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1523         remaining -= num;
1524         if (ret) {
1525             sum_alloc += num;
1526         }
1527     }
1528
1529     cvtstr(offset, s1, sizeof(s1));
1530
1531     printf("%d/%d sectors allocated at offset %s\n",
1532            sum_alloc, nb_sectors, s1);
1533     return 0;
1534 }
1535
1536 static const cmdinfo_t alloc_cmd = {
1537     .name       = "alloc",
1538     .altname    = "a",
1539     .argmin     = 1,
1540     .argmax     = 2,
1541     .cfunc      = alloc_f,
1542     .args       = "off [sectors]",
1543     .oneline    = "checks if a sector is present in the file",
1544 };
1545
1546 static int map_f(int argc, char **argv)
1547 {
1548     int64_t offset;
1549     int64_t nb_sectors;
1550     char s1[64];
1551     int num, num_checked;
1552     int ret;
1553     const char *retstr;
1554
1555     offset = 0;
1556     nb_sectors = bs->total_sectors;
1557
1558     do {
1559         num_checked = MIN(nb_sectors, INT_MAX);
1560         ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1561         retstr = ret ? "    allocated" : "not allocated";
1562         cvtstr(offset << 9ULL, s1, sizeof(s1));
1563         printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n",
1564                offset << 9ULL, num, num_checked, retstr, s1, ret);
1565
1566         offset += num;
1567         nb_sectors -= num;
1568     } while (offset < bs->total_sectors);
1569
1570     return 0;
1571 }
1572
1573 static const cmdinfo_t map_cmd = {
1574        .name           = "map",
1575        .argmin         = 0,
1576        .argmax         = 0,
1577        .cfunc          = map_f,
1578        .args           = "",
1579        .oneline        = "prints the allocated areas of a file",
1580 };
1581
1582
1583 static int close_f(int argc, char **argv)
1584 {
1585     bdrv_close(bs);
1586     bs = NULL;
1587     return 0;
1588 }
1589
1590 static const cmdinfo_t close_cmd = {
1591     .name       = "close",
1592     .altname    = "c",
1593     .cfunc      = close_f,
1594     .oneline    = "close the current open file",
1595 };
1596
1597 static int openfile(char *name, int flags, int growable)
1598 {
1599     if (bs) {
1600         fprintf(stderr, "file open already, try 'help close'\n");
1601         return 1;
1602     }
1603
1604     if (growable) {
1605         if (bdrv_file_open(&bs, name, flags)) {
1606             fprintf(stderr, "%s: can't open device %s\n", progname, name);
1607             return 1;
1608         }
1609     } else {
1610         bs = bdrv_new("hda");
1611
1612         if (bdrv_open(bs, name, flags, NULL) < 0) {
1613             fprintf(stderr, "%s: can't open device %s\n", progname, name);
1614             bs = NULL;
1615             return 1;
1616         }
1617     }
1618
1619     return 0;
1620 }
1621
1622 static void open_help(void)
1623 {
1624     printf(
1625 "\n"
1626 " opens a new file in the requested mode\n"
1627 "\n"
1628 " Example:\n"
1629 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1630 "\n"
1631 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1632 " -r, -- open file read-only\n"
1633 " -s, -- use snapshot file\n"
1634 " -n, -- disable host cache\n"
1635 " -g, -- allow file to grow (only applies to protocols)"
1636 "\n");
1637 }
1638
1639 static int open_f(int argc, char **argv);
1640
1641 static const cmdinfo_t open_cmd = {
1642     .name       = "open",
1643     .altname    = "o",
1644     .cfunc      = open_f,
1645     .argmin     = 1,
1646     .argmax     = -1,
1647     .flags      = CMD_NOFILE_OK,
1648     .args       = "[-Crsn] [path]",
1649     .oneline    = "open the file specified by path",
1650     .help       = open_help,
1651 };
1652
1653 static int open_f(int argc, char **argv)
1654 {
1655     int flags = 0;
1656     int readonly = 0;
1657     int growable = 0;
1658     int c;
1659
1660     while ((c = getopt(argc, argv, "snrg")) != EOF) {
1661         switch (c) {
1662         case 's':
1663             flags |= BDRV_O_SNAPSHOT;
1664             break;
1665         case 'n':
1666             flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
1667             break;
1668         case 'r':
1669             readonly = 1;
1670             break;
1671         case 'g':
1672             growable = 1;
1673             break;
1674         default:
1675             return command_usage(&open_cmd);
1676         }
1677     }
1678
1679     if (!readonly) {
1680         flags |= BDRV_O_RDWR;
1681     }
1682
1683     if (optind != argc - 1) {
1684         return command_usage(&open_cmd);
1685     }
1686
1687     return openfile(argv[optind], flags, growable);
1688 }
1689
1690 static int init_args_command(int index)
1691 {
1692     /* only one device allowed so far */
1693     if (index >= 1) {
1694         return 0;
1695     }
1696     return ++index;
1697 }
1698
1699 static int init_check_command(const cmdinfo_t *ct)
1700 {
1701     if (ct->flags & CMD_FLAG_GLOBAL) {
1702         return 1;
1703     }
1704     if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1705         fprintf(stderr, "no file open, try 'help open'\n");
1706         return 0;
1707     }
1708     return 1;
1709 }
1710
1711 static void usage(const char *name)
1712 {
1713     printf(
1714 "Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
1715 "QEMU Disk exerciser\n"
1716 "\n"
1717 "  -c, --cmd            command to execute\n"
1718 "  -r, --read-only      export read-only\n"
1719 "  -s, --snapshot       use snapshot file\n"
1720 "  -n, --nocache        disable host cache\n"
1721 "  -g, --growable       allow file to grow (only applies to protocols)\n"
1722 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1723 "  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
1724 "  -h, --help           display this help and exit\n"
1725 "  -V, --version        output version information and exit\n"
1726 "\n",
1727     name);
1728 }
1729
1730
1731 int main(int argc, char **argv)
1732 {
1733     int readonly = 0;
1734     int growable = 0;
1735     const char *sopt = "hVc:rsnmgk";
1736     const struct option lopt[] = {
1737         { "help", 0, NULL, 'h' },
1738         { "version", 0, NULL, 'V' },
1739         { "offset", 1, NULL, 'o' },
1740         { "cmd", 1, NULL, 'c' },
1741         { "read-only", 0, NULL, 'r' },
1742         { "snapshot", 0, NULL, 's' },
1743         { "nocache", 0, NULL, 'n' },
1744         { "misalign", 0, NULL, 'm' },
1745         { "growable", 0, NULL, 'g' },
1746         { "native-aio", 0, NULL, 'k' },
1747         { NULL, 0, NULL, 0 }
1748     };
1749     int c;
1750     int opt_index = 0;
1751     int flags = 0;
1752
1753     progname = basename(argv[0]);
1754
1755     while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1756         switch (c) {
1757         case 's':
1758             flags |= BDRV_O_SNAPSHOT;
1759             break;
1760         case 'n':
1761             flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
1762             break;
1763         case 'c':
1764             add_user_command(optarg);
1765             break;
1766         case 'r':
1767             readonly = 1;
1768             break;
1769         case 'm':
1770             misalign = 1;
1771             break;
1772         case 'g':
1773             growable = 1;
1774             break;
1775         case 'k':
1776             flags |= BDRV_O_NATIVE_AIO;
1777             break;
1778         case 'V':
1779             printf("%s version %s\n", progname, VERSION);
1780             exit(0);
1781         case 'h':
1782             usage(progname);
1783             exit(0);
1784         default:
1785             usage(progname);
1786             exit(1);
1787         }
1788     }
1789
1790     if ((argc - optind) > 1) {
1791         usage(progname);
1792         exit(1);
1793     }
1794
1795     bdrv_init();
1796
1797     /* initialize commands */
1798     quit_init();
1799     help_init();
1800     add_command(&open_cmd);
1801     add_command(&close_cmd);
1802     add_command(&read_cmd);
1803     add_command(&readv_cmd);
1804     add_command(&write_cmd);
1805     add_command(&writev_cmd);
1806     add_command(&multiwrite_cmd);
1807     add_command(&aio_read_cmd);
1808     add_command(&aio_write_cmd);
1809     add_command(&aio_flush_cmd);
1810     add_command(&flush_cmd);
1811     add_command(&truncate_cmd);
1812     add_command(&length_cmd);
1813     add_command(&info_cmd);
1814     add_command(&discard_cmd);
1815     add_command(&alloc_cmd);
1816     add_command(&map_cmd);
1817
1818     add_args_command(init_args_command);
1819     add_check_command(init_check_command);
1820
1821     /* open the device */
1822     if (!readonly) {
1823         flags |= BDRV_O_RDWR;
1824     }
1825
1826     if ((argc - optind) == 1) {
1827         openfile(argv[optind], flags, growable);
1828     }
1829     command_loop();
1830
1831     /*
1832      * Make sure all outstanding requests get flushed the program exits.
1833      */
1834     qemu_aio_flush();
1835
1836     if (bs) {
1837         bdrv_close(bs);
1838     }
1839     return 0;
1840 }