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 = g_new0(size_t, nr_iov);
 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     g_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 typedef struct {
 222     int64_t offset;
 223     int count;
 224     int *total;
 225     int ret;
 226     bool done;
 227 } CoWriteZeroes;
 228
 229 static void coroutine_fn co_write_zeroes_entry(void *opaque)
 230 {
 231     CoWriteZeroes *data = opaque;
 232
 233     data->ret = bdrv_co_write_zeroes(bs, data->offset / BDRV_SECTOR_SIZE,
 234                                      data->count / BDRV_SECTOR_SIZE);
 235     data->done = true;
 236     if (data->ret < 0) {
 237         *data->total = data->ret;
 238         return;
 239     }
 240
 241     *data->total = data->count;
 242 }
 243
 244 static int do_co_write_zeroes(int64_t offset, int count, int *total)
 245 {
 246     Coroutine *co;
 247     CoWriteZeroes data = {
 248         .offset = offset,
 249         .count  = count,
 250         .total  = total,
 251         .done   = false,
 252     };
 253
 254     co = qemu_coroutine_create(co_write_zeroes_entry);
 255     qemu_coroutine_enter(co, &data);
 256     while (!data.done) {
 257         qemu_aio_wait();
 258     }
 259     if (data.ret < 0) {
 260         return data.ret;
 261     } else {
 262         return 1;
 263     }
 264 }
 265
 266 static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
 267 {
 268     *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
 269     if (*total < 0) {
 270         return *total;
 271     }
 272     return 1;
 273 }
 274
 275 static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
 276 {
 277     *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
 278     if (*total < 0) {
 279         return *total;
 280     }
 281     return 1;
 282 }
 283
 284 #define NOT_DONE 0x7fffffff
 285 static void aio_rw_done(void *opaque, int ret)
 286 {
 287     *(int *)opaque = ret;
 288 }
 289
 290 static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
 291 {
 292     int async_ret = NOT_DONE;
 293
 294     bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
 295                    aio_rw_done, &async_ret);
 296     while (async_ret == NOT_DONE) {
 297         qemu_aio_wait();
 298     }
 299
 300     *total = qiov->size;
 301     return async_ret < 0 ? async_ret : 1;
 302 }
 303
 304 static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
 305 {
 306     int async_ret = NOT_DONE;
 307
 308     bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
 309                     aio_rw_done, &async_ret);
 310     while (async_ret == NOT_DONE) {
 311         qemu_aio_wait();
 312     }
 313
 314     *total = qiov->size;
 315     return async_ret < 0 ? async_ret : 1;
 316 }
 317
 318 struct multiwrite_async_ret {
 319     int num_done;
 320     int error;
 321 };
 322
 323 static void multiwrite_cb(void *opaque, int ret)
 324 {
 325     struct multiwrite_async_ret *async_ret = opaque;
 326
 327     async_ret->num_done++;
 328     if (ret < 0) {
 329         async_ret->error = ret;
 330     }
 331 }
 332
 333 static int do_aio_multiwrite(BlockRequest* reqs, int num_reqs, int *total)
 334 {
 335     int i, ret;
 336     struct multiwrite_async_ret async_ret = {
 337         .num_done = 0,
 338         .error = 0,
 339     };
 340
 341     *total = 0;
 342     for (i = 0; i < num_reqs; i++) {
 343         reqs[i].cb = multiwrite_cb;
 344         reqs[i].opaque = &async_ret;
 345         *total += reqs[i].qiov->size;
 346     }
 347
 348     ret = bdrv_aio_multiwrite(bs, reqs, num_reqs);
 349     if (ret < 0) {
 350         return ret;
 351     }
 352
 353     while (async_ret.num_done < num_reqs) {
 354         qemu_aio_wait();
 355     }
 356
 357     return async_ret.error < 0 ? async_ret.error : 1;
 358 }
 359
 360 static void read_help(void)
 361 {
 362     printf(
 363 "\n"
 364 " reads a range of bytes from the given offset\n"
 365 "\n"
 366 " Example:\n"
 367 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
 368 "\n"
 369 " Reads a segment of the currently open file, optionally dumping it to the\n"
 370 " standard output stream (with -v option) for subsequent inspection.\n"
 371 " -b, -- read from the VM state rather than the virtual disk\n"
 372 " -C, -- report statistics in a machine parsable format\n"
 373 " -l, -- length for pattern verification (only with -P)\n"
 374 " -p, -- use bdrv_pread to read the file\n"
 375 " -P, -- use a pattern to verify read data\n"
 376 " -q, -- quiet mode, do not show I/O statistics\n"
 377 " -s, -- start offset for pattern verification (only with -P)\n"
 378 " -v, -- dump buffer to standard output\n"
 379 "\n");
 380 }
 381
 382 static int read_f(int argc, char **argv);
 383
 384 static const cmdinfo_t read_cmd = {
 385     .name       = "read",
 386     .altname    = "r",
 387     .cfunc      = read_f,
 388     .argmin     = 2,
 389     .argmax     = -1,
 390     .args       = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
 391     .oneline    = "reads a number of bytes at a specified offset",
 392     .help       = read_help,
 393 };
 394
 395 static int read_f(int argc, char **argv)
 396 {
 397     struct timeval t1, t2;
 398     int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 399     int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
 400     int c, cnt;
 401     char *buf;
 402     int64_t offset;
 403     int count;
 404     /* Some compilers get confused and warn if this is not initialized.  */
 405     int total = 0;
 406     int pattern = 0, pattern_offset = 0, pattern_count = 0;
 407
 408     while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
 409         switch (c) {
 410         case 'b':
 411             bflag = 1;
 412             break;
 413         case 'C':
 414             Cflag = 1;
 415             break;
 416         case 'l':
 417             lflag = 1;
 418             pattern_count = cvtnum(optarg);
 419             if (pattern_count < 0) {
 420                 printf("non-numeric length argument -- %s\n", optarg);
 421                 return 0;
 422             }
 423             break;
 424         case 'p':
 425             pflag = 1;
 426             break;
 427         case 'P':
 428             Pflag = 1;
 429             pattern = parse_pattern(optarg);
 430             if (pattern < 0) {
 431                 return 0;
 432             }
 433             break;
 434         case 'q':
 435             qflag = 1;
 436             break;
 437         case 's':
 438             sflag = 1;
 439             pattern_offset = cvtnum(optarg);
 440             if (pattern_offset < 0) {
 441                 printf("non-numeric length argument -- %s\n", optarg);
 442                 return 0;
 443             }
 444             break;
 445         case 'v':
 446             vflag = 1;
 447             break;
 448         default:
 449             return command_usage(&read_cmd);
 450         }
 451     }
 452
 453     if (optind != argc - 2) {
 454         return command_usage(&read_cmd);
 455     }
 456
 457     if (bflag && pflag) {
 458         printf("-b and -p cannot be specified at the same time\n");
 459         return 0;
 460     }
 461
 462     offset = cvtnum(argv[optind]);
 463     if (offset < 0) {
 464         printf("non-numeric length argument -- %s\n", argv[optind]);
 465         return 0;
 466     }
 467
 468     optind++;
 469     count = cvtnum(argv[optind]);
 470     if (count < 0) {
 471         printf("non-numeric length argument -- %s\n", argv[optind]);
 472         return 0;
 473     }
 474
 475     if (!Pflag && (lflag || sflag)) {
 476         return command_usage(&read_cmd);
 477     }
 478
 479     if (!lflag) {
 480         pattern_count = count - pattern_offset;
 481     }
 482
 483     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 484         printf("pattern verification range exceeds end of read data\n");
 485         return 0;
 486     }
 487
 488     if (!pflag) {
 489         if (offset & 0x1ff) {
 490             printf("offset %" PRId64 " is not sector aligned\n",
 491                    offset);
 492             return 0;
 493         }
 494         if (count & 0x1ff) {
 495             printf("count %d is not sector aligned\n",
 496                    count);
 497             return 0;
 498         }
 499     }
 500
 501     buf = qemu_io_alloc(count, 0xab);
 502
 503     gettimeofday(&t1, NULL);
 504     if (pflag) {
 505         cnt = do_pread(buf, offset, count, &total);
 506     } else if (bflag) {
 507         cnt = do_load_vmstate(buf, offset, count, &total);
 508     } else {
 509         cnt = do_read(buf, offset, count, &total);
 510     }
 511     gettimeofday(&t2, NULL);
 512
 513     if (cnt < 0) {
 514         printf("read failed: %s\n", strerror(-cnt));
 515         goto out;
 516     }
 517
 518     if (Pflag) {
 519         void *cmp_buf = g_malloc(pattern_count);
 520         memset(cmp_buf, pattern, pattern_count);
 521         if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 522             printf("Pattern verification failed at offset %"
 523                    PRId64 ", %d bytes\n",
 524                    offset + pattern_offset, pattern_count);
 525         }
 526         g_free(cmp_buf);
 527     }
 528
 529     if (qflag) {
 530         goto out;
 531     }
 532
 533     if (vflag) {
 534         dump_buffer(buf, offset, count);
 535     }
 536
 537     /* Finally, report back -- -C gives a parsable format */
 538     t2 = tsub(t2, t1);
 539     print_report("read", &t2, offset, count, total, cnt, Cflag);
 540
 541 out:
 542     qemu_io_free(buf);
 543
 544     return 0;
 545 }
 546
 547 static void readv_help(void)
 548 {
 549     printf(
 550 "\n"
 551 " reads a range of bytes from the given offset into multiple buffers\n"
 552 "\n"
 553 " Example:\n"
 554 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 555 "\n"
 556 " Reads a segment of the currently open file, optionally dumping it to the\n"
 557 " standard output stream (with -v option) for subsequent inspection.\n"
 558 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 559 " -C, -- report statistics in a machine parsable format\n"
 560 " -P, -- use a pattern to verify read data\n"
 561 " -v, -- dump buffer to standard output\n"
 562 " -q, -- quiet mode, do not show I/O statistics\n"
 563 "\n");
 564 }
 565
 566 static int readv_f(int argc, char **argv);
 567
 568 static const cmdinfo_t readv_cmd = {
 569     .name       = "readv",
 570     .cfunc      = readv_f,
 571     .argmin     = 2,
 572     .argmax     = -1,
 573     .args       = "[-Cqv] [-P pattern ] off len [len..]",
 574     .oneline    = "reads a number of bytes at a specified offset",
 575     .help       = readv_help,
 576 };
 577
 578 static int readv_f(int argc, char **argv)
 579 {
 580     struct timeval t1, t2;
 581     int Cflag = 0, qflag = 0, vflag = 0;
 582     int c, cnt;
 583     char *buf;
 584     int64_t offset;
 585     /* Some compilers get confused and warn if this is not initialized.  */
 586     int total = 0;
 587     int nr_iov;
 588     QEMUIOVector qiov;
 589     int pattern = 0;
 590     int Pflag = 0;
 591
 592     while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 593         switch (c) {
 594         case 'C':
 595             Cflag = 1;
 596             break;
 597         case 'P':
 598             Pflag = 1;
 599             pattern = parse_pattern(optarg);
 600             if (pattern < 0) {
 601                 return 0;
 602             }
 603             break;
 604         case 'q':
 605             qflag = 1;
 606             break;
 607         case 'v':
 608             vflag = 1;
 609             break;
 610         default:
 611             return command_usage(&readv_cmd);
 612         }
 613     }
 614
 615     if (optind > argc - 2) {
 616         return command_usage(&readv_cmd);
 617     }
 618
 619
 620     offset = cvtnum(argv[optind]);
 621     if (offset < 0) {
 622         printf("non-numeric length argument -- %s\n", argv[optind]);
 623         return 0;
 624     }
 625     optind++;
 626
 627     if (offset & 0x1ff) {
 628         printf("offset %" PRId64 " is not sector aligned\n",
 629                offset);
 630         return 0;
 631     }
 632
 633     nr_iov = argc - optind;
 634     buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
 635     if (buf == NULL) {
 636         return 0;
 637     }
 638
 639     gettimeofday(&t1, NULL);
 640     cnt = do_aio_readv(&qiov, offset, &total);
 641     gettimeofday(&t2, NULL);
 642
 643     if (cnt < 0) {
 644         printf("readv failed: %s\n", strerror(-cnt));
 645         goto out;
 646     }
 647
 648     if (Pflag) {
 649         void *cmp_buf = g_malloc(qiov.size);
 650         memset(cmp_buf, pattern, qiov.size);
 651         if (memcmp(buf, cmp_buf, qiov.size)) {
 652             printf("Pattern verification failed at offset %"
 653                    PRId64 ", %zd bytes\n", offset, qiov.size);
 654         }
 655         g_free(cmp_buf);
 656     }
 657
 658     if (qflag) {
 659         goto out;
 660     }
 661
 662     if (vflag) {
 663         dump_buffer(buf, offset, qiov.size);
 664     }
 665
 666     /* Finally, report back -- -C gives a parsable format */
 667     t2 = tsub(t2, t1);
 668     print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 669
 670 out:
 671     qemu_io_free(buf);
 672     return 0;
 673 }
 674
 675 static void write_help(void)
 676 {
 677     printf(
 678 "\n"
 679 " writes a range of bytes from the given offset\n"
 680 "\n"
 681 " Example:\n"
 682 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 683 "\n"
 684 " Writes into a segment of the currently open file, using a buffer\n"
 685 " filled with a set pattern (0xcdcdcdcd).\n"
 686 " -b, -- write to the VM state rather than the virtual disk\n"
 687 " -p, -- use bdrv_pwrite to write the file\n"
 688 " -P, -- use different pattern to fill file\n"
 689 " -C, -- report statistics in a machine parsable format\n"
 690 " -q, -- quiet mode, do not show I/O statistics\n"
 691 " -z, -- write zeroes using bdrv_co_write_zeroes\n"
 692 "\n");
 693 }
 694
 695 static int write_f(int argc, char **argv);
 696
 697 static const cmdinfo_t write_cmd = {
 698     .name       = "write",
 699     .altname    = "w",
 700     .cfunc      = write_f,
 701     .argmin     = 2,
 702     .argmax     = -1,
 703     .args       = "[-bCpqz] [-P pattern ] off len",
 704     .oneline    = "writes a number of bytes at a specified offset",
 705     .help       = write_help,
 706 };
 707
 708 static int write_f(int argc, char **argv)
 709 {
 710     struct timeval t1, t2;
 711     int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0;
 712     int c, cnt;
 713     char *buf = NULL;
 714     int64_t offset;
 715     int count;
 716     /* Some compilers get confused and warn if this is not initialized.  */
 717     int total = 0;
 718     int pattern = 0xcd;
 719
 720     while ((c = getopt(argc, argv, "bCpP:qz")) != EOF) {
 721         switch (c) {
 722         case 'b':
 723             bflag = 1;
 724             break;
 725         case 'C':
 726             Cflag = 1;
 727             break;
 728         case 'p':
 729             pflag = 1;
 730             break;
 731         case 'P':
 732             Pflag = 1;
 733             pattern = parse_pattern(optarg);
 734             if (pattern < 0) {
 735                 return 0;
 736             }
 737             break;
 738         case 'q':
 739             qflag = 1;
 740             break;
 741         case 'z':
 742             zflag = 1;
 743             break;
 744         default:
 745             return command_usage(&write_cmd);
 746         }
 747     }
 748
 749     if (optind != argc - 2) {
 750         return command_usage(&write_cmd);
 751     }
 752
 753     if (bflag + pflag + zflag > 1) {
 754         printf("-b, -p, or -z cannot be specified at the same time\n");
 755         return 0;
 756     }
 757
 758     if (zflag && Pflag) {
 759         printf("-z and -P cannot be specified at the same time\n");
 760         return 0;
 761     }
 762
 763     offset = cvtnum(argv[optind]);
 764     if (offset < 0) {
 765         printf("non-numeric length argument -- %s\n", argv[optind]);
 766         return 0;
 767     }
 768
 769     optind++;
 770     count = cvtnum(argv[optind]);
 771     if (count < 0) {
 772         printf("non-numeric length argument -- %s\n", argv[optind]);
 773         return 0;
 774     }
 775
 776     if (!pflag) {
 777         if (offset & 0x1ff) {
 778             printf("offset %" PRId64 " is not sector aligned\n",
 779                    offset);
 780             return 0;
 781         }
 782
 783         if (count & 0x1ff) {
 784             printf("count %d is not sector aligned\n",
 785                    count);
 786             return 0;
 787         }
 788     }
 789
 790     if (!zflag) {
 791         buf = qemu_io_alloc(count, pattern);
 792     }
 793
 794     gettimeofday(&t1, NULL);
 795     if (pflag) {
 796         cnt = do_pwrite(buf, offset, count, &total);
 797     } else if (bflag) {
 798         cnt = do_save_vmstate(buf, offset, count, &total);
 799     } else if (zflag) {
 800         cnt = do_co_write_zeroes(offset, count, &total);
 801     } else {
 802         cnt = do_write(buf, offset, count, &total);
 803     }
 804     gettimeofday(&t2, NULL);
 805
 806     if (cnt < 0) {
 807         printf("write failed: %s\n", strerror(-cnt));
 808         goto out;
 809     }
 810
 811     if (qflag) {
 812         goto out;
 813     }
 814
 815     /* Finally, report back -- -C gives a parsable format */
 816     t2 = tsub(t2, t1);
 817     print_report("wrote", &t2, offset, count, total, cnt, Cflag);
 818
 819 out:
 820     if (!zflag) {
 821         qemu_io_free(buf);
 822     }
 823
 824     return 0;
 825 }
 826
 827 static void
 828 writev_help(void)
 829 {
 830     printf(
 831 "\n"
 832 " writes a range of bytes from the given offset source from multiple buffers\n"
 833 "\n"
 834 " Example:\n"
 835 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
 836 "\n"
 837 " Writes into a segment of the currently open file, using a buffer\n"
 838 " filled with a set pattern (0xcdcdcdcd).\n"
 839 " -P, -- use different pattern to fill file\n"
 840 " -C, -- report statistics in a machine parsable format\n"
 841 " -q, -- quiet mode, do not show I/O statistics\n"
 842 "\n");
 843 }
 844
 845 static int writev_f(int argc, char **argv);
 846
 847 static const cmdinfo_t writev_cmd = {
 848     .name       = "writev",
 849     .cfunc      = writev_f,
 850     .argmin     = 2,
 851     .argmax     = -1,
 852     .args       = "[-Cq] [-P pattern ] off len [len..]",
 853     .oneline    = "writes a number of bytes at a specified offset",
 854     .help       = writev_help,
 855 };
 856
 857 static int writev_f(int argc, char **argv)
 858 {
 859     struct timeval t1, t2;
 860     int Cflag = 0, qflag = 0;
 861     int c, cnt;
 862     char *buf;
 863     int64_t offset;
 864     /* Some compilers get confused and warn if this is not initialized.  */
 865     int total = 0;
 866     int nr_iov;
 867     int pattern = 0xcd;
 868     QEMUIOVector qiov;
 869
 870     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 871         switch (c) {
 872         case 'C':
 873             Cflag = 1;
 874             break;
 875         case 'q':
 876             qflag = 1;
 877             break;
 878         case 'P':
 879             pattern = parse_pattern(optarg);
 880             if (pattern < 0) {
 881                 return 0;
 882             }
 883             break;
 884         default:
 885             return command_usage(&writev_cmd);
 886         }
 887     }
 888
 889     if (optind > argc - 2) {
 890         return command_usage(&writev_cmd);
 891     }
 892
 893     offset = cvtnum(argv[optind]);
 894     if (offset < 0) {
 895         printf("non-numeric length argument -- %s\n", argv[optind]);
 896         return 0;
 897     }
 898     optind++;
 899
 900     if (offset & 0x1ff) {
 901         printf("offset %" PRId64 " is not sector aligned\n",
 902                offset);
 903         return 0;
 904     }
 905
 906     nr_iov = argc - optind;
 907     buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
 908     if (buf == NULL) {
 909         return 0;
 910     }
 911
 912     gettimeofday(&t1, NULL);
 913     cnt = do_aio_writev(&qiov, offset, &total);
 914     gettimeofday(&t2, NULL);
 915
 916     if (cnt < 0) {
 917         printf("writev failed: %s\n", strerror(-cnt));
 918         goto out;
 919     }
 920
 921     if (qflag) {
 922         goto out;
 923     }
 924
 925     /* Finally, report back -- -C gives a parsable format */
 926     t2 = tsub(t2, t1);
 927     print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
 928 out:
 929     qemu_io_free(buf);
 930     return 0;
 931 }
 932
 933 static void multiwrite_help(void)
 934 {
 935     printf(
 936 "\n"
 937 " writes a range of bytes from the given offset source from multiple buffers,\n"
 938 " in a batch of requests that may be merged by qemu\n"
 939 "\n"
 940 " Example:\n"
 941 " 'multiwrite 512 1k 1k ; 4k 1k'\n"
 942 "  writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
 943 "\n"
 944 " Writes into a segment of the currently open file, using a buffer\n"
 945 " filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
 946 " by one for each request contained in the multiwrite command.\n"
 947 " -P, -- use different pattern to fill file\n"
 948 " -C, -- report statistics in a machine parsable format\n"
 949 " -q, -- quiet mode, do not show I/O statistics\n"
 950 "\n");
 951 }
 952
 953 static int multiwrite_f(int argc, char **argv);
 954
 955 static const cmdinfo_t multiwrite_cmd = {
 956     .name       = "multiwrite",
 957     .cfunc      = multiwrite_f,
 958     .argmin     = 2,
 959     .argmax     = -1,
 960     .args       = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
 961     .oneline    = "issues multiple write requests at once",
 962     .help       = multiwrite_help,
 963 };
 964
 965 static int multiwrite_f(int argc, char **argv)
 966 {
 967     struct timeval t1, t2;
 968     int Cflag = 0, qflag = 0;
 969     int c, cnt;
 970     char **buf;
 971     int64_t offset, first_offset = 0;
 972     /* Some compilers get confused and warn if this is not initialized.  */
 973     int total = 0;
 974     int nr_iov;
 975     int nr_reqs;
 976     int pattern = 0xcd;
 977     QEMUIOVector *qiovs;
 978     int i;
 979     BlockRequest *reqs;
 980
 981     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
 982         switch (c) {
 983         case 'C':
 984             Cflag = 1;
 985             break;
 986         case 'q':
 987             qflag = 1;
 988             break;
 989         case 'P':
 990             pattern = parse_pattern(optarg);
 991             if (pattern < 0) {
 992                 return 0;
 993             }
 994             break;
 995         default:
 996             return command_usage(&writev_cmd);
 997         }
 998     }
 999
1000     if (optind > argc - 2) {
1001         return command_usage(&writev_cmd);
1002     }
1003
1004     nr_reqs = 1;
1005     for (i = optind; i < argc; i++) {
1006         if (!strcmp(argv[i], ";")) {
1007             nr_reqs++;
1008         }
1009     }
1010
1011     reqs = g_malloc0(nr_reqs * sizeof(*reqs));
1012     buf = g_malloc0(nr_reqs * sizeof(*buf));
1013     qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
1014
1015     for (i = 0; i < nr_reqs && optind < argc; i++) {
1016         int j;
1017
1018         /* Read the offset of the request */
1019         offset = cvtnum(argv[optind]);
1020         if (offset < 0) {
1021             printf("non-numeric offset argument -- %s\n", argv[optind]);
1022             goto out;
1023         }
1024         optind++;
1025
1026         if (offset & 0x1ff) {
1027             printf("offset %lld is not sector aligned\n",
1028                    (long long)offset);
1029             goto out;
1030         }
1031
1032         if (i == 0) {
1033             first_offset = offset;
1034         }
1035
1036         /* Read lengths for qiov entries */
1037         for (j = optind; j < argc; j++) {
1038             if (!strcmp(argv[j], ";")) {
1039                 break;
1040             }
1041         }
1042
1043         nr_iov = j - optind;
1044
1045         /* Build request */
1046         buf[i] = create_iovec(&qiovs[i], &argv[optind], nr_iov, pattern);
1047         if (buf[i] == NULL) {
1048             goto out;
1049         }
1050
1051         reqs[i].qiov = &qiovs[i];
1052         reqs[i].sector = offset >> 9;
1053         reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
1054
1055         optind = j + 1;
1056
1057         pattern++;
1058     }
1059
1060     /* If there were empty requests at the end, ignore them */
1061     nr_reqs = i;
1062
1063     gettimeofday(&t1, NULL);
1064     cnt = do_aio_multiwrite(reqs, nr_reqs, &total);
1065     gettimeofday(&t2, NULL);
1066
1067     if (cnt < 0) {
1068         printf("aio_multiwrite failed: %s\n", strerror(-cnt));
1069         goto out;
1070     }
1071
1072     if (qflag) {
1073         goto out;
1074     }
1075
1076     /* Finally, report back -- -C gives a parsable format */
1077     t2 = tsub(t2, t1);
1078     print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
1079 out:
1080     for (i = 0; i < nr_reqs; i++) {
1081         qemu_io_free(buf[i]);
1082         if (reqs[i].qiov != NULL) {
1083             qemu_iovec_destroy(&qiovs[i]);
1084         }
1085     }
1086     g_free(buf);
1087     g_free(reqs);
1088     g_free(qiovs);
1089     return 0;
1090 }
1091
1092 struct aio_ctx {
1093     QEMUIOVector qiov;
1094     int64_t offset;
1095     char *buf;
1096     int qflag;
1097     int vflag;
1098     int Cflag;
1099     int Pflag;
1100     int pattern;
1101     struct timeval t1;
1102 };
1103
1104 static void aio_write_done(void *opaque, int ret)
1105 {
1106     struct aio_ctx *ctx = opaque;
1107     struct timeval t2;
1108
1109     gettimeofday(&t2, NULL);
1110
1111
1112     if (ret < 0) {
1113         printf("aio_write failed: %s\n", strerror(-ret));
1114         goto out;
1115     }
1116
1117     if (ctx->qflag) {
1118         goto out;
1119     }
1120
1121     /* Finally, report back -- -C gives a parsable format */
1122     t2 = tsub(t2, ctx->t1);
1123     print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1124                  ctx->qiov.size, 1, ctx->Cflag);
1125 out:
1126     qemu_io_free(ctx->buf);
1127     g_free(ctx);
1128 }
1129
1130 static void aio_read_done(void *opaque, int ret)
1131 {
1132     struct aio_ctx *ctx = opaque;
1133     struct timeval t2;
1134
1135     gettimeofday(&t2, NULL);
1136
1137     if (ret < 0) {
1138         printf("readv failed: %s\n", strerror(-ret));
1139         goto out;
1140     }
1141
1142     if (ctx->Pflag) {
1143         void *cmp_buf = g_malloc(ctx->qiov.size);
1144
1145         memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1146         if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1147             printf("Pattern verification failed at offset %"
1148                    PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
1149         }
1150         g_free(cmp_buf);
1151     }
1152
1153     if (ctx->qflag) {
1154         goto out;
1155     }
1156
1157     if (ctx->vflag) {
1158         dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1159     }
1160
1161     /* Finally, report back -- -C gives a parsable format */
1162     t2 = tsub(t2, ctx->t1);
1163     print_report("read", &t2, ctx->offset, ctx->qiov.size,
1164                  ctx->qiov.size, 1, ctx->Cflag);
1165 out:
1166     qemu_io_free(ctx->buf);
1167     g_free(ctx);
1168 }
1169
1170 static void aio_read_help(void)
1171 {
1172     printf(
1173 "\n"
1174 " asynchronously reads a range of bytes from the given offset\n"
1175 "\n"
1176 " Example:\n"
1177 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1178 "\n"
1179 " Reads a segment of the currently open file, optionally dumping it to the\n"
1180 " standard output stream (with -v option) for subsequent inspection.\n"
1181 " The read is performed asynchronously and the aio_flush command must be\n"
1182 " used to ensure all outstanding aio requests have been completed.\n"
1183 " -C, -- report statistics in a machine parsable format\n"
1184 " -P, -- use a pattern to verify read data\n"
1185 " -v, -- dump buffer to standard output\n"
1186 " -q, -- quiet mode, do not show I/O statistics\n"
1187 "\n");
1188 }
1189
1190 static int aio_read_f(int argc, char **argv);
1191
1192 static const cmdinfo_t aio_read_cmd = {
1193     .name       = "aio_read",
1194     .cfunc      = aio_read_f,
1195     .argmin     = 2,
1196     .argmax     = -1,
1197     .args       = "[-Cqv] [-P pattern ] off len [len..]",
1198     .oneline    = "asynchronously reads a number of bytes",
1199     .help       = aio_read_help,
1200 };
1201
1202 static int aio_read_f(int argc, char **argv)
1203 {
1204     int nr_iov, c;
1205     struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1206
1207     while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
1208         switch (c) {
1209         case 'C':
1210             ctx->Cflag = 1;
1211             break;
1212         case 'P':
1213             ctx->Pflag = 1;
1214             ctx->pattern = parse_pattern(optarg);
1215             if (ctx->pattern < 0) {
1216                 g_free(ctx);
1217                 return 0;
1218             }
1219             break;
1220         case 'q':
1221             ctx->qflag = 1;
1222             break;
1223         case 'v':
1224             ctx->vflag = 1;
1225             break;
1226         default:
1227             g_free(ctx);
1228             return command_usage(&aio_read_cmd);
1229         }
1230     }
1231
1232     if (optind > argc - 2) {
1233         g_free(ctx);
1234         return command_usage(&aio_read_cmd);
1235     }
1236
1237     ctx->offset = cvtnum(argv[optind]);
1238     if (ctx->offset < 0) {
1239         printf("non-numeric length argument -- %s\n", argv[optind]);
1240         g_free(ctx);
1241         return 0;
1242     }
1243     optind++;
1244
1245     if (ctx->offset & 0x1ff) {
1246         printf("offset %" PRId64 " is not sector aligned\n",
1247                ctx->offset);
1248         g_free(ctx);
1249         return 0;
1250     }
1251
1252     nr_iov = argc - optind;
1253     ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
1254     if (ctx->buf == NULL) {
1255         g_free(ctx);
1256         return 0;
1257     }
1258
1259     gettimeofday(&ctx->t1, NULL);
1260     bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
1261                    ctx->qiov.size >> 9, aio_read_done, ctx);
1262     return 0;
1263 }
1264
1265 static void aio_write_help(void)
1266 {
1267     printf(
1268 "\n"
1269 " asynchronously writes a range of bytes from the given offset source\n"
1270 " from multiple buffers\n"
1271 "\n"
1272 " Example:\n"
1273 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1274 "\n"
1275 " Writes into a segment of the currently open file, using a buffer\n"
1276 " filled with a set pattern (0xcdcdcdcd).\n"
1277 " The write is performed asynchronously and the aio_flush command must be\n"
1278 " used to ensure all outstanding aio requests have been completed.\n"
1279 " -P, -- use different pattern to fill file\n"
1280 " -C, -- report statistics in a machine parsable format\n"
1281 " -q, -- quiet mode, do not show I/O statistics\n"
1282 "\n");
1283 }
1284
1285 static int aio_write_f(int argc, char **argv);
1286
1287 static const cmdinfo_t aio_write_cmd = {
1288     .name       = "aio_write",
1289     .cfunc      = aio_write_f,
1290     .argmin     = 2,
1291     .argmax     = -1,
1292     .args       = "[-Cq] [-P pattern ] off len [len..]",
1293     .oneline    = "asynchronously writes a number of bytes",
1294     .help       = aio_write_help,
1295 };
1296
1297 static int aio_write_f(int argc, char **argv)
1298 {
1299     int nr_iov, c;
1300     int pattern = 0xcd;
1301     struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1302
1303     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1304         switch (c) {
1305         case 'C':
1306             ctx->Cflag = 1;
1307             break;
1308         case 'q':
1309             ctx->qflag = 1;
1310             break;
1311         case 'P':
1312             pattern = parse_pattern(optarg);
1313             if (pattern < 0) {
1314                 g_free(ctx);
1315                 return 0;
1316             }
1317             break;
1318         default:
1319             g_free(ctx);
1320             return command_usage(&aio_write_cmd);
1321         }
1322     }
1323
1324     if (optind > argc - 2) {
1325         g_free(ctx);
1326         return command_usage(&aio_write_cmd);
1327     }
1328
1329     ctx->offset = cvtnum(argv[optind]);
1330     if (ctx->offset < 0) {
1331         printf("non-numeric length argument -- %s\n", argv[optind]);
1332         g_free(ctx);
1333         return 0;
1334     }
1335     optind++;
1336
1337     if (ctx->offset & 0x1ff) {
1338         printf("offset %" PRId64 " is not sector aligned\n",
1339                ctx->offset);
1340         g_free(ctx);
1341         return 0;
1342     }
1343
1344     nr_iov = argc - optind;
1345     ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
1346     if (ctx->buf == NULL) {
1347         g_free(ctx);
1348         return 0;
1349     }
1350
1351     gettimeofday(&ctx->t1, NULL);
1352     bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
1353                     ctx->qiov.size >> 9, aio_write_done, ctx);
1354     return 0;
1355 }
1356
1357 static int aio_flush_f(int argc, char **argv)
1358 {
1359     qemu_aio_flush();
1360     return 0;
1361 }
1362
1363 static const cmdinfo_t aio_flush_cmd = {
1364     .name       = "aio_flush",
1365     .cfunc      = aio_flush_f,
1366     .oneline    = "completes all outstanding aio requests"
1367 };
1368
1369 static int flush_f(int argc, char **argv)
1370 {
1371     bdrv_flush(bs);
1372     return 0;
1373 }
1374
1375 static const cmdinfo_t flush_cmd = {
1376     .name       = "flush",
1377     .altname    = "f",
1378     .cfunc      = flush_f,
1379     .oneline    = "flush all in-core file state to disk",
1380 };
1381
1382 static int truncate_f(int argc, char **argv)
1383 {
1384     int64_t offset;
1385     int ret;
1386
1387     offset = cvtnum(argv[1]);
1388     if (offset < 0) {
1389         printf("non-numeric truncate argument -- %s\n", argv[1]);
1390         return 0;
1391     }
1392
1393     ret = bdrv_truncate(bs, offset);
1394     if (ret < 0) {
1395         printf("truncate: %s\n", strerror(-ret));
1396         return 0;
1397     }
1398
1399     return 0;
1400 }
1401
1402 static const cmdinfo_t truncate_cmd = {
1403     .name       = "truncate",
1404     .altname    = "t",
1405     .cfunc      = truncate_f,
1406     .argmin     = 1,
1407     .argmax     = 1,
1408     .args       = "off",
1409     .oneline    = "truncates the current file at the given offset",
1410 };
1411
1412 static int length_f(int argc, char **argv)
1413 {
1414     int64_t size;
1415     char s1[64];
1416
1417     size = bdrv_getlength(bs);
1418     if (size < 0) {
1419         printf("getlength: %s\n", strerror(-size));
1420         return 0;
1421     }
1422
1423     cvtstr(size, s1, sizeof(s1));
1424     printf("%s\n", s1);
1425     return 0;
1426 }
1427
1428
1429 static const cmdinfo_t length_cmd = {
1430     .name   = "length",
1431     .altname    = "l",
1432     .cfunc      = length_f,
1433     .oneline    = "gets the length of the current file",
1434 };
1435
1436
1437 static int info_f(int argc, char **argv)
1438 {
1439     BlockDriverInfo bdi;
1440     char s1[64], s2[64];
1441     int ret;
1442
1443     if (bs->drv && bs->drv->format_name) {
1444         printf("format name: %s\n", bs->drv->format_name);
1445     }
1446     if (bs->drv && bs->drv->protocol_name) {
1447         printf("format name: %s\n", bs->drv->protocol_name);
1448     }
1449
1450     ret = bdrv_get_info(bs, &bdi);
1451     if (ret) {
1452         return 0;
1453     }
1454
1455     cvtstr(bdi.cluster_size, s1, sizeof(s1));
1456     cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1457
1458     printf("cluster size: %s\n", s1);
1459     printf("vm state offset: %s\n", s2);
1460
1461     return 0;
1462 }
1463
1464
1465
1466 static const cmdinfo_t info_cmd = {
1467     .name       = "info",
1468     .altname    = "i",
1469     .cfunc      = info_f,
1470     .oneline    = "prints information about the current file",
1471 };
1472
1473 static void discard_help(void)
1474 {
1475     printf(
1476 "\n"
1477 " discards a range of bytes from the given offset\n"
1478 "\n"
1479 " Example:\n"
1480 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1481 "\n"
1482 " Discards a segment of the currently open file.\n"
1483 " -C, -- report statistics in a machine parsable format\n"
1484 " -q, -- quiet mode, do not show I/O statistics\n"
1485 "\n");
1486 }
1487
1488 static int discard_f(int argc, char **argv);
1489
1490 static const cmdinfo_t discard_cmd = {
1491     .name       = "discard",
1492     .altname    = "d",
1493     .cfunc      = discard_f,
1494     .argmin     = 2,
1495     .argmax     = -1,
1496     .args       = "[-Cq] off len",
1497     .oneline    = "discards a number of bytes at a specified offset",
1498     .help       = discard_help,
1499 };
1500
1501 static int discard_f(int argc, char **argv)
1502 {
1503     struct timeval t1, t2;
1504     int Cflag = 0, qflag = 0;
1505     int c, ret;
1506     int64_t offset;
1507     int count;
1508
1509     while ((c = getopt(argc, argv, "Cq")) != EOF) {
1510         switch (c) {
1511         case 'C':
1512             Cflag = 1;
1513             break;
1514         case 'q':
1515             qflag = 1;
1516             break;
1517         default:
1518             return command_usage(&discard_cmd);
1519         }
1520     }
1521
1522     if (optind != argc - 2) {
1523         return command_usage(&discard_cmd);
1524     }
1525
1526     offset = cvtnum(argv[optind]);
1527     if (offset < 0) {
1528         printf("non-numeric length argument -- %s\n", argv[optind]);
1529         return 0;
1530     }
1531
1532     optind++;
1533     count = cvtnum(argv[optind]);
1534     if (count < 0) {
1535         printf("non-numeric length argument -- %s\n", argv[optind]);
1536         return 0;
1537     }
1538
1539     gettimeofday(&t1, NULL);
1540     ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
1541                        count >> BDRV_SECTOR_BITS);
1542     gettimeofday(&t2, NULL);
1543
1544     if (ret < 0) {
1545         printf("discard failed: %s\n", strerror(-ret));
1546         goto out;
1547     }
1548
1549     /* Finally, report back -- -C gives a parsable format */
1550     if (!qflag) {
1551         t2 = tsub(t2, t1);
1552         print_report("discard", &t2, offset, count, count, 1, Cflag);
1553     }
1554
1555 out:
1556     return 0;
1557 }
1558
1559 static int alloc_f(int argc, char **argv)
1560 {
1561     int64_t offset;
1562     int nb_sectors, remaining;
1563     char s1[64];
1564     int num, sum_alloc;
1565     int ret;
1566
1567     offset = cvtnum(argv[1]);
1568     if (offset & 0x1ff) {
1569         printf("offset %" PRId64 " is not sector aligned\n",
1570                offset);
1571         return 0;
1572     }
1573
1574     if (argc == 3) {
1575         nb_sectors = cvtnum(argv[2]);
1576     } else {
1577         nb_sectors = 1;
1578     }
1579
1580     remaining = nb_sectors;
1581     sum_alloc = 0;
1582     while (remaining) {
1583         ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
1584         remaining -= num;
1585         if (ret) {
1586             sum_alloc += num;
1587         }
1588     }
1589
1590     cvtstr(offset, s1, sizeof(s1));
1591
1592     printf("%d/%d sectors allocated at offset %s\n",
1593            sum_alloc, nb_sectors, s1);
1594     return 0;
1595 }
1596
1597 static const cmdinfo_t alloc_cmd = {
1598     .name       = "alloc",
1599     .altname    = "a",
1600     .argmin     = 1,
1601     .argmax     = 2,
1602     .cfunc      = alloc_f,
1603     .args       = "off [sectors]",
1604     .oneline    = "checks if a sector is present in the file",
1605 };
1606
1607 static int map_f(int argc, char **argv)
1608 {
1609     int64_t offset;
1610     int64_t nb_sectors;
1611     char s1[64];
1612     int num, num_checked;
1613     int ret;
1614     const char *retstr;
1615
1616     offset = 0;
1617     nb_sectors = bs->total_sectors;
1618
1619     do {
1620         num_checked = MIN(nb_sectors, INT_MAX);
1621         ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1622         retstr = ret ? "    allocated" : "not allocated";
1623         cvtstr(offset << 9ULL, s1, sizeof(s1));
1624         printf("[% 24" PRId64 "] % 8d/% 8d sectors %s at offset %s (%d)\n",
1625                offset << 9ULL, num, num_checked, retstr, s1, ret);
1626
1627         offset += num;
1628         nb_sectors -= num;
1629     } while (offset < bs->total_sectors);
1630
1631     return 0;
1632 }
1633
1634 static const cmdinfo_t map_cmd = {
1635        .name           = "map",
1636        .argmin         = 0,
1637        .argmax         = 0,
1638        .cfunc          = map_f,
1639        .args           = "",
1640        .oneline        = "prints the allocated areas of a file",
1641 };
1642
1643
1644 static int close_f(int argc, char **argv)
1645 {
1646     bdrv_delete(bs);
1647     bs = NULL;
1648     return 0;
1649 }
1650
1651 static const cmdinfo_t close_cmd = {
1652     .name       = "close",
1653     .altname    = "c",
1654     .cfunc      = close_f,
1655     .oneline    = "close the current open file",
1656 };
1657
1658 static int openfile(char *name, int flags, int growable)
1659 {
1660     if (bs) {
1661         fprintf(stderr, "file open already, try 'help close'\n");
1662         return 1;
1663     }
1664
1665     if (growable) {
1666         if (bdrv_file_open(&bs, name, flags)) {
1667             fprintf(stderr, "%s: can't open device %s\n", progname, name);
1668             return 1;
1669         }
1670     } else {
1671         bs = bdrv_new("hda");
1672
1673         if (bdrv_open(bs, name, flags, NULL) < 0) {
1674             fprintf(stderr, "%s: can't open device %s\n", progname, name);
1675             bdrv_delete(bs);
1676             bs = NULL;
1677             return 1;
1678         }
1679     }
1680
1681     return 0;
1682 }
1683
1684 static void open_help(void)
1685 {
1686     printf(
1687 "\n"
1688 " opens a new file in the requested mode\n"
1689 "\n"
1690 " Example:\n"
1691 " 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
1692 "\n"
1693 " Opens a file for subsequent use by all of the other qemu-io commands.\n"
1694 " -r, -- open file read-only\n"
1695 " -s, -- use snapshot file\n"
1696 " -n, -- disable host cache\n"
1697 " -g, -- allow file to grow (only applies to protocols)"
1698 "\n");
1699 }
1700
1701 static int open_f(int argc, char **argv);
1702
1703 static const cmdinfo_t open_cmd = {
1704     .name       = "open",
1705     .altname    = "o",
1706     .cfunc      = open_f,
1707     .argmin     = 1,
1708     .argmax     = -1,
1709     .flags      = CMD_NOFILE_OK,
1710     .args       = "[-Crsn] [path]",
1711     .oneline    = "open the file specified by path",
1712     .help       = open_help,
1713 };
1714
1715 static int open_f(int argc, char **argv)
1716 {
1717     int flags = 0;
1718     int readonly = 0;
1719     int growable = 0;
1720     int c;
1721
1722     while ((c = getopt(argc, argv, "snrg")) != EOF) {
1723         switch (c) {
1724         case 's':
1725             flags |= BDRV_O_SNAPSHOT;
1726             break;
1727         case 'n':
1728             flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
1729             break;
1730         case 'r':
1731             readonly = 1;
1732             break;
1733         case 'g':
1734             growable = 1;
1735             break;
1736         default:
1737             return command_usage(&open_cmd);
1738         }
1739     }
1740
1741     if (!readonly) {
1742         flags |= BDRV_O_RDWR;
1743     }
1744
1745     if (optind != argc - 1) {
1746         return command_usage(&open_cmd);
1747     }
1748
1749     return openfile(argv[optind], flags, growable);
1750 }
1751
1752 static int init_args_command(int index)
1753 {
1754     /* only one device allowed so far */
1755     if (index >= 1) {
1756         return 0;
1757     }
1758     return ++index;
1759 }
1760
1761 static int init_check_command(const cmdinfo_t *ct)
1762 {
1763     if (ct->flags & CMD_FLAG_GLOBAL) {
1764         return 1;
1765     }
1766     if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
1767         fprintf(stderr, "no file open, try 'help open'\n");
1768         return 0;
1769     }
1770     return 1;
1771 }
1772
1773 static void usage(const char *name)
1774 {
1775     printf(
1776 "Usage: %s [-h] [-V] [-rsnm] [-c cmd] ... [file]\n"
1777 "QEMU Disk exerciser\n"
1778 "\n"
1779 "  -c, --cmd            command to execute\n"
1780 "  -r, --read-only      export read-only\n"
1781 "  -s, --snapshot       use snapshot file\n"
1782 "  -n, --nocache        disable host cache\n"
1783 "  -g, --growable       allow file to grow (only applies to protocols)\n"
1784 "  -m, --misalign       misalign allocations for O_DIRECT\n"
1785 "  -k, --native-aio     use kernel AIO implementation (on Linux only)\n"
1786 "  -h, --help           display this help and exit\n"
1787 "  -V, --version        output version information and exit\n"
1788 "\n",
1789     name);
1790 }
1791
1792
1793 int main(int argc, char **argv)
1794 {
1795     int readonly = 0;
1796     int growable = 0;
1797     const char *sopt = "hVc:rsnmgk";
1798     const struct option lopt[] = {
1799         { "help", 0, NULL, 'h' },
1800         { "version", 0, NULL, 'V' },
1801         { "offset", 1, NULL, 'o' },
1802         { "cmd", 1, NULL, 'c' },
1803         { "read-only", 0, NULL, 'r' },
1804         { "snapshot", 0, NULL, 's' },
1805         { "nocache", 0, NULL, 'n' },
1806         { "misalign", 0, NULL, 'm' },
1807         { "growable", 0, NULL, 'g' },
1808         { "native-aio", 0, NULL, 'k' },
1809         { NULL, 0, NULL, 0 }
1810     };
1811     int c;
1812     int opt_index = 0;
1813     int flags = 0;
1814
1815     progname = basename(argv[0]);
1816
1817     while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
1818         switch (c) {
1819         case 's':
1820             flags |= BDRV_O_SNAPSHOT;
1821             break;
1822         case 'n':
1823             flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
1824             break;
1825         case 'c':
1826             add_user_command(optarg);
1827             break;
1828         case 'r':
1829             readonly = 1;
1830             break;
1831         case 'm':
1832             misalign = 1;
1833             break;
1834         case 'g':
1835             growable = 1;
1836             break;
1837         case 'k':
1838             flags |= BDRV_O_NATIVE_AIO;
1839             break;
1840         case 'V':
1841             printf("%s version %s\n", progname, VERSION);
1842             exit(0);
1843         case 'h':
1844             usage(progname);
1845             exit(0);
1846         default:
1847             usage(progname);
1848             exit(1);
1849         }
1850     }
1851
1852     if ((argc - optind) > 1) {
1853         usage(progname);
1854         exit(1);
1855     }
1856
1857     bdrv_init();
1858
1859     qemu_init_main_loop();
1860
1861     /* initialize commands */
1862     quit_init();
1863     help_init();
1864     add_command(&open_cmd);
1865     add_command(&close_cmd);
1866     add_command(&read_cmd);
1867     add_command(&readv_cmd);
1868     add_command(&write_cmd);
1869     add_command(&writev_cmd);
1870     add_command(&multiwrite_cmd);
1871     add_command(&aio_read_cmd);
1872     add_command(&aio_write_cmd);
1873     add_command(&aio_flush_cmd);
1874     add_command(&flush_cmd);
1875     add_command(&truncate_cmd);
1876     add_command(&length_cmd);
1877     add_command(&info_cmd);
1878     add_command(&discard_cmd);
1879     add_command(&alloc_cmd);
1880     add_command(&map_cmd);
1881
1882     add_args_command(init_args_command);
1883     add_check_command(init_check_command);
1884
1885     /* open the device */
1886     if (!readonly) {
1887         flags |= BDRV_O_RDWR;
1888     }
1889
1890     if ((argc - optind) == 1) {
1891         openfile(argv[optind], flags, growable);
1892     }
1893     command_loop();
1894
1895     /*
1896      * Make sure all outstanding requests complete before the program exits.
1897      */
1898     bdrv_drain_all();
1899
1900     if (bs) {
1901         bdrv_delete(bs);
1902     }
1903     return 0;
1904 }