qemu-io-cmds.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
  11 #include "qemu-io.h"
  12 #include "block/block_int.h"
  13 #include "qemu/main-loop.h"
  14
  15 #define CMD_NOFILE_OK   0x01
  16
  17 int qemuio_misalign;
  18
  19 static cmdinfo_t *cmdtab;
  20 static int ncmds;
  21
  22 static int compare_cmdname(const void *a, const void *b)
  23 {
  24     return strcmp(((const cmdinfo_t *)a)->name,
  25                   ((const cmdinfo_t *)b)->name);
  26 }
  27
  28 void qemuio_add_command(const cmdinfo_t *ci)
  29 {
  30     cmdtab = g_realloc(cmdtab, ++ncmds * sizeof(*cmdtab));
  31     cmdtab[ncmds - 1] = *ci;
  32     qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
  33 }
  34
  35 int qemuio_command_usage(const cmdinfo_t *ci)
  36 {
  37     printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
  38     return 0;
  39 }
  40
  41 static int init_check_command(BlockDriverState *bs, const cmdinfo_t *ct)
  42 {
  43     if (ct->flags & CMD_FLAG_GLOBAL) {
  44         return 1;
  45     }
  46     if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
  47         fprintf(stderr, "no file open, try 'help open'\n");
  48         return 0;
  49     }
  50     return 1;
  51 }
  52
  53 static int command(BlockDriverState *bs, const cmdinfo_t *ct, int argc,
  54                    char **argv)
  55 {
  56     char *cmd = argv[0];
  57
  58     if (!init_check_command(bs, ct)) {
  59         return 0;
  60     }
  61
  62     if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) {
  63         if (ct->argmax == -1) {
  64             fprintf(stderr,
  65                     "bad argument count %d to %s, expected at least %d arguments\n",
  66                     argc-1, cmd, ct->argmin);
  67         } else if (ct->argmin == ct->argmax) {
  68             fprintf(stderr,
  69                     "bad argument count %d to %s, expected %d arguments\n",
  70                     argc-1, cmd, ct->argmin);
  71         } else {
  72             fprintf(stderr,
  73                     "bad argument count %d to %s, expected between %d and %d arguments\n",
  74                     argc-1, cmd, ct->argmin, ct->argmax);
  75         }
  76         return 0;
  77     }
  78     optind = 0;
  79     return ct->cfunc(bs, argc, argv);
  80 }
  81
  82 static const cmdinfo_t *find_command(const char *cmd)
  83 {
  84     cmdinfo_t *ct;
  85
  86     for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
  87         if (strcmp(ct->name, cmd) == 0 ||
  88             (ct->altname && strcmp(ct->altname, cmd) == 0))
  89         {
  90             return (const cmdinfo_t *)ct;
  91         }
  92     }
  93     return NULL;
  94 }
  95
  96 static char **breakline(char *input, int *count)
  97 {
  98     int c = 0;
  99     char *p;
 100     char **rval = g_malloc0(sizeof(char *));
 101     char **tmp;
 102
 103     while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
 104         if (!*p) {
 105             continue;
 106         }
 107         c++;
 108         tmp = g_realloc(rval, sizeof(*rval) * (c + 1));
 109         if (!tmp) {
 110             g_free(rval);
 111             rval = NULL;
 112             c = 0;
 113             break;
 114         } else {
 115             rval = tmp;
 116         }
 117         rval[c - 1] = p;
 118         rval[c] = NULL;
 119     }
 120     *count = c;
 121     return rval;
 122 }
 123
 124 static int64_t cvtnum(const char *s)
 125 {
 126     char *end;
 127     return strtosz_suffix(s, &end, STRTOSZ_DEFSUFFIX_B);
 128 }
 129
 130 #define EXABYTES(x)     ((long long)(x) << 60)
 131 #define PETABYTES(x)    ((long long)(x) << 50)
 132 #define TERABYTES(x)    ((long long)(x) << 40)
 133 #define GIGABYTES(x)    ((long long)(x) << 30)
 134 #define MEGABYTES(x)    ((long long)(x) << 20)
 135 #define KILOBYTES(x)    ((long long)(x) << 10)
 136
 137 #define TO_EXABYTES(x)  ((x) / EXABYTES(1))
 138 #define TO_PETABYTES(x) ((x) / PETABYTES(1))
 139 #define TO_TERABYTES(x) ((x) / TERABYTES(1))
 140 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
 141 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
 142 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
 143
 144 static void cvtstr(double value, char *str, size_t size)
 145 {
 146     char *trim;
 147     const char *suffix;
 148
 149     if (value >= EXABYTES(1)) {
 150         suffix = " EiB";
 151         snprintf(str, size - 4, "%.3f", TO_EXABYTES(value));
 152     } else if (value >= PETABYTES(1)) {
 153         suffix = " PiB";
 154         snprintf(str, size - 4, "%.3f", TO_PETABYTES(value));
 155     } else if (value >= TERABYTES(1)) {
 156         suffix = " TiB";
 157         snprintf(str, size - 4, "%.3f", TO_TERABYTES(value));
 158     } else if (value >= GIGABYTES(1)) {
 159         suffix = " GiB";
 160         snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value));
 161     } else if (value >= MEGABYTES(1)) {
 162         suffix = " MiB";
 163         snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value));
 164     } else if (value >= KILOBYTES(1)) {
 165         suffix = " KiB";
 166         snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value));
 167     } else {
 168         suffix = " bytes";
 169         snprintf(str, size - 6, "%f", value);
 170     }
 171
 172     trim = strstr(str, ".000");
 173     if (trim) {
 174         strcpy(trim, suffix);
 175     } else {
 176         strcat(str, suffix);
 177     }
 178 }
 179
 180
 181
 182 static struct timeval tsub(struct timeval t1, struct timeval t2)
 183 {
 184     t1.tv_usec -= t2.tv_usec;
 185     if (t1.tv_usec < 0) {
 186         t1.tv_usec += 1000000;
 187         t1.tv_sec--;
 188     }
 189     t1.tv_sec -= t2.tv_sec;
 190     return t1;
 191 }
 192
 193 static double tdiv(double value, struct timeval tv)
 194 {
 195     return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
 196 }
 197
 198 #define HOURS(sec)      ((sec) / (60 * 60))
 199 #define MINUTES(sec)    (((sec) % (60 * 60)) / 60)
 200 #define SECONDS(sec)    ((sec) % 60)
 201
 202 enum {
 203     DEFAULT_TIME        = 0x0,
 204     TERSE_FIXED_TIME    = 0x1,
 205     VERBOSE_FIXED_TIME  = 0x2,
 206 };
 207
 208 static void timestr(struct timeval *tv, char *ts, size_t size, int format)
 209 {
 210     double usec = (double)tv->tv_usec / 1000000.0;
 211
 212     if (format & TERSE_FIXED_TIME) {
 213         if (!HOURS(tv->tv_sec)) {
 214             snprintf(ts, size, "%u:%02u.%02u",
 215                     (unsigned int) MINUTES(tv->tv_sec),
 216                     (unsigned int) SECONDS(tv->tv_sec),
 217                     (unsigned int) (usec * 100));
 218             return;
 219         }
 220         format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
 221     }
 222
 223     if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
 224         snprintf(ts, size, "%u:%02u:%02u.%02u",
 225                 (unsigned int) HOURS(tv->tv_sec),
 226                 (unsigned int) MINUTES(tv->tv_sec),
 227                 (unsigned int) SECONDS(tv->tv_sec),
 228                 (unsigned int) (usec * 100));
 229     } else {
 230         snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
 231     }
 232 }
 233
 234 /*
 235  * Parse the pattern argument to various sub-commands.
 236  *
 237  * Because the pattern is used as an argument to memset it must evaluate
 238  * to an unsigned integer that fits into a single byte.
 239  */
 240 static int parse_pattern(const char *arg)
 241 {
 242     char *endptr = NULL;
 243     long pattern;
 244
 245     pattern = strtol(arg, &endptr, 0);
 246     if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
 247         printf("%s is not a valid pattern byte\n", arg);
 248         return -1;
 249     }
 250
 251     return pattern;
 252 }
 253
 254 /*
 255  * Memory allocation helpers.
 256  *
 257  * Make sure memory is aligned by default, or purposefully misaligned if
 258  * that is specified on the command line.
 259  */
 260
 261 #define MISALIGN_OFFSET     16
 262 static void *qemu_io_alloc(BlockDriverState *bs, size_t len, int pattern)
 263 {
 264     void *buf;
 265
 266     if (qemuio_misalign) {
 267         len += MISALIGN_OFFSET;
 268     }
 269     buf = qemu_blockalign(bs, len);
 270     memset(buf, pattern, len);
 271     if (qemuio_misalign) {
 272         buf += MISALIGN_OFFSET;
 273     }
 274     return buf;
 275 }
 276
 277 static void qemu_io_free(void *p)
 278 {
 279     if (qemuio_misalign) {
 280         p -= MISALIGN_OFFSET;
 281     }
 282     qemu_vfree(p);
 283 }
 284
 285 static void dump_buffer(const void *buffer, int64_t offset, int len)
 286 {
 287     int i, j;
 288     const uint8_t *p;
 289
 290     for (i = 0, p = buffer; i < len; i += 16) {
 291         const uint8_t *s = p;
 292
 293         printf("%08" PRIx64 ":  ", offset + i);
 294         for (j = 0; j < 16 && i + j < len; j++, p++) {
 295             printf("%02x ", *p);
 296         }
 297         printf(" ");
 298         for (j = 0; j < 16 && i + j < len; j++, s++) {
 299             if (isalnum(*s)) {
 300                 printf("%c", *s);
 301             } else {
 302                 printf(".");
 303             }
 304         }
 305         printf("\n");
 306     }
 307 }
 308
 309 static void print_report(const char *op, struct timeval *t, int64_t offset,
 310                          int count, int total, int cnt, int Cflag)
 311 {
 312     char s1[64], s2[64], ts[64];
 313
 314     timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
 315     if (!Cflag) {
 316         cvtstr((double)total, s1, sizeof(s1));
 317         cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
 318         printf("%s %d/%d bytes at offset %" PRId64 "\n",
 319                op, total, count, offset);
 320         printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
 321                s1, cnt, ts, s2, tdiv((double)cnt, *t));
 322     } else {/* bytes,ops,time,bytes/sec,ops/sec */
 323         printf("%d,%d,%s,%.3f,%.3f\n",
 324             total, cnt, ts,
 325             tdiv((double)total, *t),
 326             tdiv((double)cnt, *t));
 327     }
 328 }
 329
 330 /*
 331  * Parse multiple length statements for vectored I/O, and construct an I/O
 332  * vector matching it.
 333  */
 334 static void *
 335 create_iovec(BlockDriverState *bs, QEMUIOVector *qiov, char **argv, int nr_iov,
 336              int pattern)
 337 {
 338     size_t *sizes = g_new0(size_t, nr_iov);
 339     size_t count = 0;
 340     void *buf = NULL;
 341     void *p;
 342     int i;
 343
 344     for (i = 0; i < nr_iov; i++) {
 345         char *arg = argv[i];
 346         int64_t len;
 347
 348         len = cvtnum(arg);
 349         if (len < 0) {
 350             printf("non-numeric length argument -- %s\n", arg);
 351             goto fail;
 352         }
 353
 354         /* should be SIZE_T_MAX, but that doesn't exist */
 355         if (len > INT_MAX) {
 356             printf("too large length argument -- %s\n", arg);
 357             goto fail;
 358         }
 359
 360         if (len & 0x1ff) {
 361             printf("length argument %" PRId64
 362                    " is not sector aligned\n", len);
 363             goto fail;
 364         }
 365
 366         sizes[i] = len;
 367         count += len;
 368     }
 369
 370     qemu_iovec_init(qiov, nr_iov);
 371
 372     buf = p = qemu_io_alloc(bs, count, pattern);
 373
 374     for (i = 0; i < nr_iov; i++) {
 375         qemu_iovec_add(qiov, p, sizes[i]);
 376         p += sizes[i];
 377     }
 378
 379 fail:
 380     g_free(sizes);
 381     return buf;
 382 }
 383
 384 static int do_read(BlockDriverState *bs, char *buf, int64_t offset, int count,
 385                    int *total)
 386 {
 387     int ret;
 388
 389     ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 390     if (ret < 0) {
 391         return ret;
 392     }
 393     *total = count;
 394     return 1;
 395 }
 396
 397 static int do_write(BlockDriverState *bs, char *buf, int64_t offset, int count,
 398                     int *total)
 399 {
 400     int ret;
 401
 402     ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 403     if (ret < 0) {
 404         return ret;
 405     }
 406     *total = count;
 407     return 1;
 408 }
 409
 410 static int do_pread(BlockDriverState *bs, char *buf, int64_t offset, int count,
 411                     int *total)
 412 {
 413     *total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
 414     if (*total < 0) {
 415         return *total;
 416     }
 417     return 1;
 418 }
 419
 420 static int do_pwrite(BlockDriverState *bs, char *buf, int64_t offset, int count,
 421                      int *total)
 422 {
 423     *total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
 424     if (*total < 0) {
 425         return *total;
 426     }
 427     return 1;
 428 }
 429
 430 typedef struct {
 431     BlockDriverState *bs;
 432     int64_t offset;
 433     int count;
 434     int *total;
 435     int ret;
 436     bool done;
 437 } CoWriteZeroes;
 438
 439 static void coroutine_fn co_write_zeroes_entry(void *opaque)
 440 {
 441     CoWriteZeroes *data = opaque;
 442
 443     data->ret = bdrv_co_write_zeroes(data->bs, data->offset / BDRV_SECTOR_SIZE,
 444                                      data->count / BDRV_SECTOR_SIZE);
 445     data->done = true;
 446     if (data->ret < 0) {
 447         *data->total = data->ret;
 448         return;
 449     }
 450
 451     *data->total = data->count;
 452 }
 453
 454 static int do_co_write_zeroes(BlockDriverState *bs, int64_t offset, int count,
 455                               int *total)
 456 {
 457     Coroutine *co;
 458     CoWriteZeroes data = {
 459         .bs     = bs,
 460         .offset = offset,
 461         .count  = count,
 462         .total  = total,
 463         .done   = false,
 464     };
 465
 466     co = qemu_coroutine_create(co_write_zeroes_entry);
 467     qemu_coroutine_enter(co, &data);
 468     while (!data.done) {
 469         qemu_aio_wait();
 470     }
 471     if (data.ret < 0) {
 472         return data.ret;
 473     } else {
 474         return 1;
 475     }
 476 }
 477
 478 static int do_write_compressed(BlockDriverState *bs, char *buf, int64_t offset,
 479                                int count, int *total)
 480 {
 481     int ret;
 482
 483     ret = bdrv_write_compressed(bs, offset >> 9, (uint8_t *)buf, count >> 9);
 484     if (ret < 0) {
 485         return ret;
 486     }
 487     *total = count;
 488     return 1;
 489 }
 490
 491 static int do_load_vmstate(BlockDriverState *bs, char *buf, int64_t offset,
 492                            int count, int *total)
 493 {
 494     *total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
 495     if (*total < 0) {
 496         return *total;
 497     }
 498     return 1;
 499 }
 500
 501 static int do_save_vmstate(BlockDriverState *bs, char *buf, int64_t offset,
 502                            int count, int *total)
 503 {
 504     *total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
 505     if (*total < 0) {
 506         return *total;
 507     }
 508     return 1;
 509 }
 510
 511 #define NOT_DONE 0x7fffffff
 512 static void aio_rw_done(void *opaque, int ret)
 513 {
 514     *(int *)opaque = ret;
 515 }
 516
 517 static int do_aio_readv(BlockDriverState *bs, QEMUIOVector *qiov,
 518                         int64_t offset, int *total)
 519 {
 520     int async_ret = NOT_DONE;
 521
 522     bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
 523                    aio_rw_done, &async_ret);
 524     while (async_ret == NOT_DONE) {
 525         main_loop_wait(false);
 526     }
 527
 528     *total = qiov->size;
 529     return async_ret < 0 ? async_ret : 1;
 530 }
 531
 532 static int do_aio_writev(BlockDriverState *bs, QEMUIOVector *qiov,
 533                          int64_t offset, int *total)
 534 {
 535     int async_ret = NOT_DONE;
 536
 537     bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
 538                     aio_rw_done, &async_ret);
 539     while (async_ret == NOT_DONE) {
 540         main_loop_wait(false);
 541     }
 542
 543     *total = qiov->size;
 544     return async_ret < 0 ? async_ret : 1;
 545 }
 546
 547 struct multiwrite_async_ret {
 548     int num_done;
 549     int error;
 550 };
 551
 552 static void multiwrite_cb(void *opaque, int ret)
 553 {
 554     struct multiwrite_async_ret *async_ret = opaque;
 555
 556     async_ret->num_done++;
 557     if (ret < 0) {
 558         async_ret->error = ret;
 559     }
 560 }
 561
 562 static int do_aio_multiwrite(BlockDriverState *bs, BlockRequest* reqs,
 563                              int num_reqs, int *total)
 564 {
 565     int i, ret;
 566     struct multiwrite_async_ret async_ret = {
 567         .num_done = 0,
 568         .error = 0,
 569     };
 570
 571     *total = 0;
 572     for (i = 0; i < num_reqs; i++) {
 573         reqs[i].cb = multiwrite_cb;
 574         reqs[i].opaque = &async_ret;
 575         *total += reqs[i].qiov->size;
 576     }
 577
 578     ret = bdrv_aio_multiwrite(bs, reqs, num_reqs);
 579     if (ret < 0) {
 580         return ret;
 581     }
 582
 583     while (async_ret.num_done < num_reqs) {
 584         main_loop_wait(false);
 585     }
 586
 587     return async_ret.error < 0 ? async_ret.error : 1;
 588 }
 589
 590 static void read_help(void)
 591 {
 592     printf(
 593 "\n"
 594 " reads a range of bytes from the given offset\n"
 595 "\n"
 596 " Example:\n"
 597 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
 598 "\n"
 599 " Reads a segment of the currently open file, optionally dumping it to the\n"
 600 " standard output stream (with -v option) for subsequent inspection.\n"
 601 " -b, -- read from the VM state rather than the virtual disk\n"
 602 " -C, -- report statistics in a machine parsable format\n"
 603 " -l, -- length for pattern verification (only with -P)\n"
 604 " -p, -- use bdrv_pread to read the file\n"
 605 " -P, -- use a pattern to verify read data\n"
 606 " -q, -- quiet mode, do not show I/O statistics\n"
 607 " -s, -- start offset for pattern verification (only with -P)\n"
 608 " -v, -- dump buffer to standard output\n"
 609 "\n");
 610 }
 611
 612 static int read_f(BlockDriverState *bs, int argc, char **argv);
 613
 614 static const cmdinfo_t read_cmd = {
 615     .name       = "read",
 616     .altname    = "r",
 617     .cfunc      = read_f,
 618     .argmin     = 2,
 619     .argmax     = -1,
 620     .args       = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
 621     .oneline    = "reads a number of bytes at a specified offset",
 622     .help       = read_help,
 623 };
 624
 625 static int read_f(BlockDriverState *bs, int argc, char **argv)
 626 {
 627     struct timeval t1, t2;
 628     int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
 629     int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
 630     int c, cnt;
 631     char *buf;
 632     int64_t offset;
 633     int count;
 634     /* Some compilers get confused and warn if this is not initialized.  */
 635     int total = 0;
 636     int pattern = 0, pattern_offset = 0, pattern_count = 0;
 637
 638     while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
 639         switch (c) {
 640         case 'b':
 641             bflag = 1;
 642             break;
 643         case 'C':
 644             Cflag = 1;
 645             break;
 646         case 'l':
 647             lflag = 1;
 648             pattern_count = cvtnum(optarg);
 649             if (pattern_count < 0) {
 650                 printf("non-numeric length argument -- %s\n", optarg);
 651                 return 0;
 652             }
 653             break;
 654         case 'p':
 655             pflag = 1;
 656             break;
 657         case 'P':
 658             Pflag = 1;
 659             pattern = parse_pattern(optarg);
 660             if (pattern < 0) {
 661                 return 0;
 662             }
 663             break;
 664         case 'q':
 665             qflag = 1;
 666             break;
 667         case 's':
 668             sflag = 1;
 669             pattern_offset = cvtnum(optarg);
 670             if (pattern_offset < 0) {
 671                 printf("non-numeric length argument -- %s\n", optarg);
 672                 return 0;
 673             }
 674             break;
 675         case 'v':
 676             vflag = 1;
 677             break;
 678         default:
 679             return qemuio_command_usage(&read_cmd);
 680         }
 681     }
 682
 683     if (optind != argc - 2) {
 684         return qemuio_command_usage(&read_cmd);
 685     }
 686
 687     if (bflag && pflag) {
 688         printf("-b and -p cannot be specified at the same time\n");
 689         return 0;
 690     }
 691
 692     offset = cvtnum(argv[optind]);
 693     if (offset < 0) {
 694         printf("non-numeric length argument -- %s\n", argv[optind]);
 695         return 0;
 696     }
 697
 698     optind++;
 699     count = cvtnum(argv[optind]);
 700     if (count < 0) {
 701         printf("non-numeric length argument -- %s\n", argv[optind]);
 702         return 0;
 703     }
 704
 705     if (!Pflag && (lflag || sflag)) {
 706         return qemuio_command_usage(&read_cmd);
 707     }
 708
 709     if (!lflag) {
 710         pattern_count = count - pattern_offset;
 711     }
 712
 713     if ((pattern_count < 0) || (pattern_count + pattern_offset > count))  {
 714         printf("pattern verification range exceeds end of read data\n");
 715         return 0;
 716     }
 717
 718     if (!pflag) {
 719         if (offset & 0x1ff) {
 720             printf("offset %" PRId64 " is not sector aligned\n",
 721                    offset);
 722             return 0;
 723         }
 724         if (count & 0x1ff) {
 725             printf("count %d is not sector aligned\n",
 726                    count);
 727             return 0;
 728         }
 729     }
 730
 731     buf = qemu_io_alloc(bs, count, 0xab);
 732
 733     gettimeofday(&t1, NULL);
 734     if (pflag) {
 735         cnt = do_pread(bs, buf, offset, count, &total);
 736     } else if (bflag) {
 737         cnt = do_load_vmstate(bs, buf, offset, count, &total);
 738     } else {
 739         cnt = do_read(bs, buf, offset, count, &total);
 740     }
 741     gettimeofday(&t2, NULL);
 742
 743     if (cnt < 0) {
 744         printf("read failed: %s\n", strerror(-cnt));
 745         goto out;
 746     }
 747
 748     if (Pflag) {
 749         void *cmp_buf = g_malloc(pattern_count);
 750         memset(cmp_buf, pattern, pattern_count);
 751         if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
 752             printf("Pattern verification failed at offset %"
 753                    PRId64 ", %d bytes\n",
 754                    offset + pattern_offset, pattern_count);
 755         }
 756         g_free(cmp_buf);
 757     }
 758
 759     if (qflag) {
 760         goto out;
 761     }
 762
 763     if (vflag) {
 764         dump_buffer(buf, offset, count);
 765     }
 766
 767     /* Finally, report back -- -C gives a parsable format */
 768     t2 = tsub(t2, t1);
 769     print_report("read", &t2, offset, count, total, cnt, Cflag);
 770
 771 out:
 772     qemu_io_free(buf);
 773
 774     return 0;
 775 }
 776
 777 static void readv_help(void)
 778 {
 779     printf(
 780 "\n"
 781 " reads a range of bytes from the given offset into multiple buffers\n"
 782 "\n"
 783 " Example:\n"
 784 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
 785 "\n"
 786 " Reads a segment of the currently open file, optionally dumping it to the\n"
 787 " standard output stream (with -v option) for subsequent inspection.\n"
 788 " Uses multiple iovec buffers if more than one byte range is specified.\n"
 789 " -C, -- report statistics in a machine parsable format\n"
 790 " -P, -- use a pattern to verify read data\n"
 791 " -v, -- dump buffer to standard output\n"
 792 " -q, -- quiet mode, do not show I/O statistics\n"
 793 "\n");
 794 }
 795
 796 static int readv_f(BlockDriverState *bs, int argc, char **argv);
 797
 798 static const cmdinfo_t readv_cmd = {
 799     .name       = "readv",
 800     .cfunc      = readv_f,
 801     .argmin     = 2,
 802     .argmax     = -1,
 803     .args       = "[-Cqv] [-P pattern ] off len [len..]",
 804     .oneline    = "reads a number of bytes at a specified offset",
 805     .help       = readv_help,
 806 };
 807
 808 static int readv_f(BlockDriverState *bs, int argc, char **argv)
 809 {
 810     struct timeval t1, t2;
 811     int Cflag = 0, qflag = 0, vflag = 0;
 812     int c, cnt;
 813     char *buf;
 814     int64_t offset;
 815     /* Some compilers get confused and warn if this is not initialized.  */
 816     int total = 0;
 817     int nr_iov;
 818     QEMUIOVector qiov;
 819     int pattern = 0;
 820     int Pflag = 0;
 821
 822     while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
 823         switch (c) {
 824         case 'C':
 825             Cflag = 1;
 826             break;
 827         case 'P':
 828             Pflag = 1;
 829             pattern = parse_pattern(optarg);
 830             if (pattern < 0) {
 831                 return 0;
 832             }
 833             break;
 834         case 'q':
 835             qflag = 1;
 836             break;
 837         case 'v':
 838             vflag = 1;
 839             break;
 840         default:
 841             return qemuio_command_usage(&readv_cmd);
 842         }
 843     }
 844
 845     if (optind > argc - 2) {
 846         return qemuio_command_usage(&readv_cmd);
 847     }
 848
 849
 850     offset = cvtnum(argv[optind]);
 851     if (offset < 0) {
 852         printf("non-numeric length argument -- %s\n", argv[optind]);
 853         return 0;
 854     }
 855     optind++;
 856
 857     if (offset & 0x1ff) {
 858         printf("offset %" PRId64 " is not sector aligned\n",
 859                offset);
 860         return 0;
 861     }
 862
 863     nr_iov = argc - optind;
 864     buf = create_iovec(bs, &qiov, &argv[optind], nr_iov, 0xab);
 865     if (buf == NULL) {
 866         return 0;
 867     }
 868
 869     gettimeofday(&t1, NULL);
 870     cnt = do_aio_readv(bs, &qiov, offset, &total);
 871     gettimeofday(&t2, NULL);
 872
 873     if (cnt < 0) {
 874         printf("readv failed: %s\n", strerror(-cnt));
 875         goto out;
 876     }
 877
 878     if (Pflag) {
 879         void *cmp_buf = g_malloc(qiov.size);
 880         memset(cmp_buf, pattern, qiov.size);
 881         if (memcmp(buf, cmp_buf, qiov.size)) {
 882             printf("Pattern verification failed at offset %"
 883                    PRId64 ", %zd bytes\n", offset, qiov.size);
 884         }
 885         g_free(cmp_buf);
 886     }
 887
 888     if (qflag) {
 889         goto out;
 890     }
 891
 892     if (vflag) {
 893         dump_buffer(buf, offset, qiov.size);
 894     }
 895
 896     /* Finally, report back -- -C gives a parsable format */
 897     t2 = tsub(t2, t1);
 898     print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
 899
 900 out:
 901     qemu_iovec_destroy(&qiov);
 902     qemu_io_free(buf);
 903     return 0;
 904 }
 905
 906 static void write_help(void)
 907 {
 908     printf(
 909 "\n"
 910 " writes a range of bytes from the given offset\n"
 911 "\n"
 912 " Example:\n"
 913 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
 914 "\n"
 915 " Writes into a segment of the currently open file, using a buffer\n"
 916 " filled with a set pattern (0xcdcdcdcd).\n"
 917 " -b, -- write to the VM state rather than the virtual disk\n"
 918 " -c, -- write compressed data with bdrv_write_compressed\n"
 919 " -p, -- use bdrv_pwrite to write the file\n"
 920 " -P, -- use different pattern to fill file\n"
 921 " -C, -- report statistics in a machine parsable format\n"
 922 " -q, -- quiet mode, do not show I/O statistics\n"
 923 " -z, -- write zeroes using bdrv_co_write_zeroes\n"
 924 "\n");
 925 }
 926
 927 static int write_f(BlockDriverState *bs, int argc, char **argv);
 928
 929 static const cmdinfo_t write_cmd = {
 930     .name       = "write",
 931     .altname    = "w",
 932     .cfunc      = write_f,
 933     .argmin     = 2,
 934     .argmax     = -1,
 935     .args       = "[-bcCpqz] [-P pattern ] off len",
 936     .oneline    = "writes a number of bytes at a specified offset",
 937     .help       = write_help,
 938 };
 939
 940 static int write_f(BlockDriverState *bs, int argc, char **argv)
 941 {
 942     struct timeval t1, t2;
 943     int Cflag = 0, pflag = 0, qflag = 0, bflag = 0, Pflag = 0, zflag = 0;
 944     int cflag = 0;
 945     int c, cnt;
 946     char *buf = NULL;
 947     int64_t offset;
 948     int count;
 949     /* Some compilers get confused and warn if this is not initialized.  */
 950     int total = 0;
 951     int pattern = 0xcd;
 952
 953     while ((c = getopt(argc, argv, "bcCpP:qz")) != EOF) {
 954         switch (c) {
 955         case 'b':
 956             bflag = 1;
 957             break;
 958         case 'c':
 959             cflag = 1;
 960             break;
 961         case 'C':
 962             Cflag = 1;
 963             break;
 964         case 'p':
 965             pflag = 1;
 966             break;
 967         case 'P':
 968             Pflag = 1;
 969             pattern = parse_pattern(optarg);
 970             if (pattern < 0) {
 971                 return 0;
 972             }
 973             break;
 974         case 'q':
 975             qflag = 1;
 976             break;
 977         case 'z':
 978             zflag = 1;
 979             break;
 980         default:
 981             return qemuio_command_usage(&write_cmd);
 982         }
 983     }
 984
 985     if (optind != argc - 2) {
 986         return qemuio_command_usage(&write_cmd);
 987     }
 988
 989     if (bflag + pflag + zflag > 1) {
 990         printf("-b, -p, or -z cannot be specified at the same time\n");
 991         return 0;
 992     }
 993
 994     if (zflag && Pflag) {
 995         printf("-z and -P cannot be specified at the same time\n");
 996         return 0;
 997     }
 998
 999     offset = cvtnum(argv[optind]);
1000     if (offset < 0) {
1001         printf("non-numeric length argument -- %s\n", argv[optind]);
1002         return 0;
1003     }
1004
1005     optind++;
1006     count = cvtnum(argv[optind]);
1007     if (count < 0) {
1008         printf("non-numeric length argument -- %s\n", argv[optind]);
1009         return 0;
1010     }
1011
1012     if (!pflag) {
1013         if (offset & 0x1ff) {
1014             printf("offset %" PRId64 " is not sector aligned\n",
1015                    offset);
1016             return 0;
1017         }
1018
1019         if (count & 0x1ff) {
1020             printf("count %d is not sector aligned\n",
1021                    count);
1022             return 0;
1023         }
1024     }
1025
1026     if (!zflag) {
1027         buf = qemu_io_alloc(bs, count, pattern);
1028     }
1029
1030     gettimeofday(&t1, NULL);
1031     if (pflag) {
1032         cnt = do_pwrite(bs, buf, offset, count, &total);
1033     } else if (bflag) {
1034         cnt = do_save_vmstate(bs, buf, offset, count, &total);
1035     } else if (zflag) {
1036         cnt = do_co_write_zeroes(bs, offset, count, &total);
1037     } else if (cflag) {
1038         cnt = do_write_compressed(bs, buf, offset, count, &total);
1039     } else {
1040         cnt = do_write(bs, buf, offset, count, &total);
1041     }
1042     gettimeofday(&t2, NULL);
1043
1044     if (cnt < 0) {
1045         printf("write failed: %s\n", strerror(-cnt));
1046         goto out;
1047     }
1048
1049     if (qflag) {
1050         goto out;
1051     }
1052
1053     /* Finally, report back -- -C gives a parsable format */
1054     t2 = tsub(t2, t1);
1055     print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1056
1057 out:
1058     if (!zflag) {
1059         qemu_io_free(buf);
1060     }
1061
1062     return 0;
1063 }
1064
1065 static void
1066 writev_help(void)
1067 {
1068     printf(
1069 "\n"
1070 " writes a range of bytes from the given offset source from multiple buffers\n"
1071 "\n"
1072 " Example:\n"
1073 " 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1074 "\n"
1075 " Writes into a segment of the currently open file, using a buffer\n"
1076 " filled with a set pattern (0xcdcdcdcd).\n"
1077 " -P, -- use different pattern to fill file\n"
1078 " -C, -- report statistics in a machine parsable format\n"
1079 " -q, -- quiet mode, do not show I/O statistics\n"
1080 "\n");
1081 }
1082
1083 static int writev_f(BlockDriverState *bs, int argc, char **argv);
1084
1085 static const cmdinfo_t writev_cmd = {
1086     .name       = "writev",
1087     .cfunc      = writev_f,
1088     .argmin     = 2,
1089     .argmax     = -1,
1090     .args       = "[-Cq] [-P pattern ] off len [len..]",
1091     .oneline    = "writes a number of bytes at a specified offset",
1092     .help       = writev_help,
1093 };
1094
1095 static int writev_f(BlockDriverState *bs, int argc, char **argv)
1096 {
1097     struct timeval t1, t2;
1098     int Cflag = 0, qflag = 0;
1099     int c, cnt;
1100     char *buf;
1101     int64_t offset;
1102     /* Some compilers get confused and warn if this is not initialized.  */
1103     int total = 0;
1104     int nr_iov;
1105     int pattern = 0xcd;
1106     QEMUIOVector qiov;
1107
1108     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1109         switch (c) {
1110         case 'C':
1111             Cflag = 1;
1112             break;
1113         case 'q':
1114             qflag = 1;
1115             break;
1116         case 'P':
1117             pattern = parse_pattern(optarg);
1118             if (pattern < 0) {
1119                 return 0;
1120             }
1121             break;
1122         default:
1123             return qemuio_command_usage(&writev_cmd);
1124         }
1125     }
1126
1127     if (optind > argc - 2) {
1128         return qemuio_command_usage(&writev_cmd);
1129     }
1130
1131     offset = cvtnum(argv[optind]);
1132     if (offset < 0) {
1133         printf("non-numeric length argument -- %s\n", argv[optind]);
1134         return 0;
1135     }
1136     optind++;
1137
1138     if (offset & 0x1ff) {
1139         printf("offset %" PRId64 " is not sector aligned\n",
1140                offset);
1141         return 0;
1142     }
1143
1144     nr_iov = argc - optind;
1145     buf = create_iovec(bs, &qiov, &argv[optind], nr_iov, pattern);
1146     if (buf == NULL) {
1147         return 0;
1148     }
1149
1150     gettimeofday(&t1, NULL);
1151     cnt = do_aio_writev(bs, &qiov, offset, &total);
1152     gettimeofday(&t2, NULL);
1153
1154     if (cnt < 0) {
1155         printf("writev failed: %s\n", strerror(-cnt));
1156         goto out;
1157     }
1158
1159     if (qflag) {
1160         goto out;
1161     }
1162
1163     /* Finally, report back -- -C gives a parsable format */
1164     t2 = tsub(t2, t1);
1165     print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1166 out:
1167     qemu_iovec_destroy(&qiov);
1168     qemu_io_free(buf);
1169     return 0;
1170 }
1171
1172 static void multiwrite_help(void)
1173 {
1174     printf(
1175 "\n"
1176 " writes a range of bytes from the given offset source from multiple buffers,\n"
1177 " in a batch of requests that may be merged by qemu\n"
1178 "\n"
1179 " Example:\n"
1180 " 'multiwrite 512 1k 1k ; 4k 1k'\n"
1181 "  writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
1182 "\n"
1183 " Writes into a segment of the currently open file, using a buffer\n"
1184 " filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
1185 " by one for each request contained in the multiwrite command.\n"
1186 " -P, -- use different pattern to fill file\n"
1187 " -C, -- report statistics in a machine parsable format\n"
1188 " -q, -- quiet mode, do not show I/O statistics\n"
1189 "\n");
1190 }
1191
1192 static int multiwrite_f(BlockDriverState *bs, int argc, char **argv);
1193
1194 static const cmdinfo_t multiwrite_cmd = {
1195     .name       = "multiwrite",
1196     .cfunc      = multiwrite_f,
1197     .argmin     = 2,
1198     .argmax     = -1,
1199     .args       = "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
1200     .oneline    = "issues multiple write requests at once",
1201     .help       = multiwrite_help,
1202 };
1203
1204 static int multiwrite_f(BlockDriverState *bs, int argc, char **argv)
1205 {
1206     struct timeval t1, t2;
1207     int Cflag = 0, qflag = 0;
1208     int c, cnt;
1209     char **buf;
1210     int64_t offset, first_offset = 0;
1211     /* Some compilers get confused and warn if this is not initialized.  */
1212     int total = 0;
1213     int nr_iov;
1214     int nr_reqs;
1215     int pattern = 0xcd;
1216     QEMUIOVector *qiovs;
1217     int i;
1218     BlockRequest *reqs;
1219
1220     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1221         switch (c) {
1222         case 'C':
1223             Cflag = 1;
1224             break;
1225         case 'q':
1226             qflag = 1;
1227             break;
1228         case 'P':
1229             pattern = parse_pattern(optarg);
1230             if (pattern < 0) {
1231                 return 0;
1232             }
1233             break;
1234         default:
1235             return qemuio_command_usage(&writev_cmd);
1236         }
1237     }
1238
1239     if (optind > argc - 2) {
1240         return qemuio_command_usage(&writev_cmd);
1241     }
1242
1243     nr_reqs = 1;
1244     for (i = optind; i < argc; i++) {
1245         if (!strcmp(argv[i], ";")) {
1246             nr_reqs++;
1247         }
1248     }
1249
1250     reqs = g_malloc0(nr_reqs * sizeof(*reqs));
1251     buf = g_malloc0(nr_reqs * sizeof(*buf));
1252     qiovs = g_malloc(nr_reqs * sizeof(*qiovs));
1253
1254     for (i = 0; i < nr_reqs && optind < argc; i++) {
1255         int j;
1256
1257         /* Read the offset of the request */
1258         offset = cvtnum(argv[optind]);
1259         if (offset < 0) {
1260             printf("non-numeric offset argument -- %s\n", argv[optind]);
1261             goto out;
1262         }
1263         optind++;
1264
1265         if (offset & 0x1ff) {
1266             printf("offset %lld is not sector aligned\n",
1267                    (long long)offset);
1268             goto out;
1269         }
1270
1271         if (i == 0) {
1272             first_offset = offset;
1273         }
1274
1275         /* Read lengths for qiov entries */
1276         for (j = optind; j < argc; j++) {
1277             if (!strcmp(argv[j], ";")) {
1278                 break;
1279             }
1280         }
1281
1282         nr_iov = j - optind;
1283
1284         /* Build request */
1285         buf[i] = create_iovec(bs, &qiovs[i], &argv[optind], nr_iov, pattern);
1286         if (buf[i] == NULL) {
1287             goto out;
1288         }
1289
1290         reqs[i].qiov = &qiovs[i];
1291         reqs[i].sector = offset >> 9;
1292         reqs[i].nb_sectors = reqs[i].qiov->size >> 9;
1293
1294         optind = j + 1;
1295
1296         pattern++;
1297     }
1298
1299     /* If there were empty requests at the end, ignore them */
1300     nr_reqs = i;
1301
1302     gettimeofday(&t1, NULL);
1303     cnt = do_aio_multiwrite(bs, reqs, nr_reqs, &total);
1304     gettimeofday(&t2, NULL);
1305
1306     if (cnt < 0) {
1307         printf("aio_multiwrite failed: %s\n", strerror(-cnt));
1308         goto out;
1309     }
1310
1311     if (qflag) {
1312         goto out;
1313     }
1314
1315     /* Finally, report back -- -C gives a parsable format */
1316     t2 = tsub(t2, t1);
1317     print_report("wrote", &t2, first_offset, total, total, cnt, Cflag);
1318 out:
1319     for (i = 0; i < nr_reqs; i++) {
1320         qemu_io_free(buf[i]);
1321         if (reqs[i].qiov != NULL) {
1322             qemu_iovec_destroy(&qiovs[i]);
1323         }
1324     }
1325     g_free(buf);
1326     g_free(reqs);
1327     g_free(qiovs);
1328     return 0;
1329 }
1330
1331 struct aio_ctx {
1332     QEMUIOVector qiov;
1333     int64_t offset;
1334     char *buf;
1335     int qflag;
1336     int vflag;
1337     int Cflag;
1338     int Pflag;
1339     int pattern;
1340     struct timeval t1;
1341 };
1342
1343 static void aio_write_done(void *opaque, int ret)
1344 {
1345     struct aio_ctx *ctx = opaque;
1346     struct timeval t2;
1347
1348     gettimeofday(&t2, NULL);
1349
1350
1351     if (ret < 0) {
1352         printf("aio_write failed: %s\n", strerror(-ret));
1353         goto out;
1354     }
1355
1356     if (ctx->qflag) {
1357         goto out;
1358     }
1359
1360     /* Finally, report back -- -C gives a parsable format */
1361     t2 = tsub(t2, ctx->t1);
1362     print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1363                  ctx->qiov.size, 1, ctx->Cflag);
1364 out:
1365     qemu_io_free(ctx->buf);
1366     qemu_iovec_destroy(&ctx->qiov);
1367     g_free(ctx);
1368 }
1369
1370 static void aio_read_done(void *opaque, int ret)
1371 {
1372     struct aio_ctx *ctx = opaque;
1373     struct timeval t2;
1374
1375     gettimeofday(&t2, NULL);
1376
1377     if (ret < 0) {
1378         printf("readv failed: %s\n", strerror(-ret));
1379         goto out;
1380     }
1381
1382     if (ctx->Pflag) {
1383         void *cmp_buf = g_malloc(ctx->qiov.size);
1384
1385         memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1386         if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1387             printf("Pattern verification failed at offset %"
1388                    PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
1389         }
1390         g_free(cmp_buf);
1391     }
1392
1393     if (ctx->qflag) {
1394         goto out;
1395     }
1396
1397     if (ctx->vflag) {
1398         dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1399     }
1400
1401     /* Finally, report back -- -C gives a parsable format */
1402     t2 = tsub(t2, ctx->t1);
1403     print_report("read", &t2, ctx->offset, ctx->qiov.size,
1404                  ctx->qiov.size, 1, ctx->Cflag);
1405 out:
1406     qemu_io_free(ctx->buf);
1407     qemu_iovec_destroy(&ctx->qiov);
1408     g_free(ctx);
1409 }
1410
1411 static void aio_read_help(void)
1412 {
1413     printf(
1414 "\n"
1415 " asynchronously reads a range of bytes from the given offset\n"
1416 "\n"
1417 " Example:\n"
1418 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1419 "\n"
1420 " Reads a segment of the currently open file, optionally dumping it to the\n"
1421 " standard output stream (with -v option) for subsequent inspection.\n"
1422 " The read is performed asynchronously and the aio_flush command must be\n"
1423 " used to ensure all outstanding aio requests have been completed.\n"
1424 " -C, -- report statistics in a machine parsable format\n"
1425 " -P, -- use a pattern to verify read data\n"
1426 " -v, -- dump buffer to standard output\n"
1427 " -q, -- quiet mode, do not show I/O statistics\n"
1428 "\n");
1429 }
1430
1431 static int aio_read_f(BlockDriverState *bs, int argc, char **argv);
1432
1433 static const cmdinfo_t aio_read_cmd = {
1434     .name       = "aio_read",
1435     .cfunc      = aio_read_f,
1436     .argmin     = 2,
1437     .argmax     = -1,
1438     .args       = "[-Cqv] [-P pattern ] off len [len..]",
1439     .oneline    = "asynchronously reads a number of bytes",
1440     .help       = aio_read_help,
1441 };
1442
1443 static int aio_read_f(BlockDriverState *bs, int argc, char **argv)
1444 {
1445     int nr_iov, c;
1446     struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1447
1448     while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
1449         switch (c) {
1450         case 'C':
1451             ctx->Cflag = 1;
1452             break;
1453         case 'P':
1454             ctx->Pflag = 1;
1455             ctx->pattern = parse_pattern(optarg);
1456             if (ctx->pattern < 0) {
1457                 g_free(ctx);
1458                 return 0;
1459             }
1460             break;
1461         case 'q':
1462             ctx->qflag = 1;
1463             break;
1464         case 'v':
1465             ctx->vflag = 1;
1466             break;
1467         default:
1468             g_free(ctx);
1469             return qemuio_command_usage(&aio_read_cmd);
1470         }
1471     }
1472
1473     if (optind > argc - 2) {
1474         g_free(ctx);
1475         return qemuio_command_usage(&aio_read_cmd);
1476     }
1477
1478     ctx->offset = cvtnum(argv[optind]);
1479     if (ctx->offset < 0) {
1480         printf("non-numeric length argument -- %s\n", argv[optind]);
1481         g_free(ctx);
1482         return 0;
1483     }
1484     optind++;
1485
1486     if (ctx->offset & 0x1ff) {
1487         printf("offset %" PRId64 " is not sector aligned\n",
1488                ctx->offset);
1489         g_free(ctx);
1490         return 0;
1491     }
1492
1493     nr_iov = argc - optind;
1494     ctx->buf = create_iovec(bs, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1495     if (ctx->buf == NULL) {
1496         g_free(ctx);
1497         return 0;
1498     }
1499
1500     gettimeofday(&ctx->t1, NULL);
1501     bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
1502                    ctx->qiov.size >> 9, aio_read_done, ctx);
1503     return 0;
1504 }
1505
1506 static void aio_write_help(void)
1507 {
1508     printf(
1509 "\n"
1510 " asynchronously writes a range of bytes from the given offset source\n"
1511 " from multiple buffers\n"
1512 "\n"
1513 " Example:\n"
1514 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1515 "\n"
1516 " Writes into a segment of the currently open file, using a buffer\n"
1517 " filled with a set pattern (0xcdcdcdcd).\n"
1518 " The write is performed asynchronously and the aio_flush command must be\n"
1519 " used to ensure all outstanding aio requests have been completed.\n"
1520 " -P, -- use different pattern to fill file\n"
1521 " -C, -- report statistics in a machine parsable format\n"
1522 " -q, -- quiet mode, do not show I/O statistics\n"
1523 "\n");
1524 }
1525
1526 static int aio_write_f(BlockDriverState *bs, int argc, char **argv);
1527
1528 static const cmdinfo_t aio_write_cmd = {
1529     .name       = "aio_write",
1530     .cfunc      = aio_write_f,
1531     .argmin     = 2,
1532     .argmax     = -1,
1533     .args       = "[-Cq] [-P pattern ] off len [len..]",
1534     .oneline    = "asynchronously writes a number of bytes",
1535     .help       = aio_write_help,
1536 };
1537
1538 static int aio_write_f(BlockDriverState *bs, int argc, char **argv)
1539 {
1540     int nr_iov, c;
1541     int pattern = 0xcd;
1542     struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1543
1544     while ((c = getopt(argc, argv, "CqP:")) != EOF) {
1545         switch (c) {
1546         case 'C':
1547             ctx->Cflag = 1;
1548             break;
1549         case 'q':
1550             ctx->qflag = 1;
1551             break;
1552         case 'P':
1553             pattern = parse_pattern(optarg);
1554             if (pattern < 0) {
1555                 g_free(ctx);
1556                 return 0;
1557             }
1558             break;
1559         default:
1560             g_free(ctx);
1561             return qemuio_command_usage(&aio_write_cmd);
1562         }
1563     }
1564
1565     if (optind > argc - 2) {
1566         g_free(ctx);
1567         return qemuio_command_usage(&aio_write_cmd);
1568     }
1569
1570     ctx->offset = cvtnum(argv[optind]);
1571     if (ctx->offset < 0) {
1572         printf("non-numeric length argument -- %s\n", argv[optind]);
1573         g_free(ctx);
1574         return 0;
1575     }
1576     optind++;
1577
1578     if (ctx->offset & 0x1ff) {
1579         printf("offset %" PRId64 " is not sector aligned\n",
1580                ctx->offset);
1581         g_free(ctx);
1582         return 0;
1583     }
1584
1585     nr_iov = argc - optind;
1586     ctx->buf = create_iovec(bs, &ctx->qiov, &argv[optind], nr_iov, pattern);
1587     if (ctx->buf == NULL) {
1588         g_free(ctx);
1589         return 0;
1590     }
1591
1592     gettimeofday(&ctx->t1, NULL);
1593     bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
1594                     ctx->qiov.size >> 9, aio_write_done, ctx);
1595     return 0;
1596 }
1597
1598 static int aio_flush_f(BlockDriverState *bs, int argc, char **argv)
1599 {
1600     bdrv_drain_all();
1601     return 0;
1602 }
1603
1604 static const cmdinfo_t aio_flush_cmd = {
1605     .name       = "aio_flush",
1606     .cfunc      = aio_flush_f,
1607     .oneline    = "completes all outstanding aio requests"
1608 };
1609
1610 static int flush_f(BlockDriverState *bs, int argc, char **argv)
1611 {
1612     bdrv_flush(bs);
1613     return 0;
1614 }
1615
1616 static const cmdinfo_t flush_cmd = {
1617     .name       = "flush",
1618     .altname    = "f",
1619     .cfunc      = flush_f,
1620     .oneline    = "flush all in-core file state to disk",
1621 };
1622
1623 static int truncate_f(BlockDriverState *bs, int argc, char **argv)
1624 {
1625     int64_t offset;
1626     int ret;
1627
1628     offset = cvtnum(argv[1]);
1629     if (offset < 0) {
1630         printf("non-numeric truncate argument -- %s\n", argv[1]);
1631         return 0;
1632     }
1633
1634     ret = bdrv_truncate(bs, offset);
1635     if (ret < 0) {
1636         printf("truncate: %s\n", strerror(-ret));
1637         return 0;
1638     }
1639
1640     return 0;
1641 }
1642
1643 static const cmdinfo_t truncate_cmd = {
1644     .name       = "truncate",
1645     .altname    = "t",
1646     .cfunc      = truncate_f,
1647     .argmin     = 1,
1648     .argmax     = 1,
1649     .args       = "off",
1650     .oneline    = "truncates the current file at the given offset",
1651 };
1652
1653 static int length_f(BlockDriverState *bs, int argc, char **argv)
1654 {
1655     int64_t size;
1656     char s1[64];
1657
1658     size = bdrv_getlength(bs);
1659     if (size < 0) {
1660         printf("getlength: %s\n", strerror(-size));
1661         return 0;
1662     }
1663
1664     cvtstr(size, s1, sizeof(s1));
1665     printf("%s\n", s1);
1666     return 0;
1667 }
1668
1669
1670 static const cmdinfo_t length_cmd = {
1671     .name   = "length",
1672     .altname    = "l",
1673     .cfunc      = length_f,
1674     .oneline    = "gets the length of the current file",
1675 };
1676
1677
1678 static int info_f(BlockDriverState *bs, int argc, char **argv)
1679 {
1680     BlockDriverInfo bdi;
1681     char s1[64], s2[64];
1682     int ret;
1683
1684     if (bs->drv && bs->drv->format_name) {
1685         printf("format name: %s\n", bs->drv->format_name);
1686     }
1687     if (bs->drv && bs->drv->protocol_name) {
1688         printf("format name: %s\n", bs->drv->protocol_name);
1689     }
1690
1691     ret = bdrv_get_info(bs, &bdi);
1692     if (ret) {
1693         return 0;
1694     }
1695
1696     cvtstr(bdi.cluster_size, s1, sizeof(s1));
1697     cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1698
1699     printf("cluster size: %s\n", s1);
1700     printf("vm state offset: %s\n", s2);
1701
1702     return 0;
1703 }
1704
1705
1706
1707 static const cmdinfo_t info_cmd = {
1708     .name       = "info",
1709     .altname    = "i",
1710     .cfunc      = info_f,
1711     .oneline    = "prints information about the current file",
1712 };
1713
1714 static void discard_help(void)
1715 {
1716     printf(
1717 "\n"
1718 " discards a range of bytes from the given offset\n"
1719 "\n"
1720 " Example:\n"
1721 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1722 "\n"
1723 " Discards a segment of the currently open file.\n"
1724 " -C, -- report statistics in a machine parsable format\n"
1725 " -q, -- quiet mode, do not show I/O statistics\n"
1726 "\n");
1727 }
1728
1729 static int discard_f(BlockDriverState *bs, int argc, char **argv);
1730
1731 static const cmdinfo_t discard_cmd = {
1732     .name       = "discard",
1733     .altname    = "d",
1734     .cfunc      = discard_f,
1735     .argmin     = 2,
1736     .argmax     = -1,
1737     .args       = "[-Cq] off len",
1738     .oneline    = "discards a number of bytes at a specified offset",
1739     .help       = discard_help,
1740 };
1741
1742 static int discard_f(BlockDriverState *bs, int argc, char **argv)
1743 {
1744     struct timeval t1, t2;
1745     int Cflag = 0, qflag = 0;
1746     int c, ret;
1747     int64_t offset;
1748     int count;
1749
1750     while ((c = getopt(argc, argv, "Cq")) != EOF) {
1751         switch (c) {
1752         case 'C':
1753             Cflag = 1;
1754             break;
1755         case 'q':
1756             qflag = 1;
1757             break;
1758         default:
1759             return qemuio_command_usage(&discard_cmd);
1760         }
1761     }
1762
1763     if (optind != argc - 2) {
1764         return qemuio_command_usage(&discard_cmd);
1765     }
1766
1767     offset = cvtnum(argv[optind]);
1768     if (offset < 0) {
1769         printf("non-numeric length argument -- %s\n", argv[optind]);
1770         return 0;
1771     }
1772
1773     optind++;
1774     count = cvtnum(argv[optind]);
1775     if (count < 0) {
1776         printf("non-numeric length argument -- %s\n", argv[optind]);
1777         return 0;
1778     }
1779
1780     gettimeofday(&t1, NULL);
1781     ret = bdrv_discard(bs, offset >> BDRV_SECTOR_BITS,
1782                        count >> BDRV_SECTOR_BITS);
1783     gettimeofday(&t2, NULL);
1784
1785     if (ret < 0) {
1786         printf("discard failed: %s\n", strerror(-ret));
1787         goto out;
1788     }
1789
1790     /* Finally, report back -- -C gives a parsable format */
1791     if (!qflag) {
1792         t2 = tsub(t2, t1);
1793         print_report("discard", &t2, offset, count, count, 1, Cflag);
1794     }
1795
1796 out:
1797     return 0;
1798 }
1799
1800 static int alloc_f(BlockDriverState *bs, int argc, char **argv)
1801 {
1802     int64_t offset, sector_num;
1803     int nb_sectors, remaining;
1804     char s1[64];
1805     int num, sum_alloc;
1806     int ret;
1807
1808     offset = cvtnum(argv[1]);
1809     if (offset < 0) {
1810         printf("non-numeric offset argument -- %s\n", argv[1]);
1811         return 0;
1812     } else if (offset & 0x1ff) {
1813         printf("offset %" PRId64 " is not sector aligned\n",
1814                offset);
1815         return 0;
1816     }
1817
1818     if (argc == 3) {
1819         nb_sectors = cvtnum(argv[2]);
1820         if (nb_sectors < 0) {
1821             printf("non-numeric length argument -- %s\n", argv[2]);
1822             return 0;
1823         }
1824     } else {
1825         nb_sectors = 1;
1826     }
1827
1828     remaining = nb_sectors;
1829     sum_alloc = 0;
1830     sector_num = offset >> 9;
1831     while (remaining) {
1832         ret = bdrv_is_allocated(bs, sector_num, remaining, &num);
1833         if (ret < 0) {
1834             printf("is_allocated failed: %s\n", strerror(-ret));
1835             return 0;
1836         }
1837         sector_num += num;
1838         remaining -= num;
1839         if (ret) {
1840             sum_alloc += num;
1841         }
1842         if (num == 0) {
1843             nb_sectors -= remaining;
1844             remaining = 0;
1845         }
1846     }
1847
1848     cvtstr(offset, s1, sizeof(s1));
1849
1850     printf("%d/%d sectors allocated at offset %s\n",
1851            sum_alloc, nb_sectors, s1);
1852     return 0;
1853 }
1854
1855 static const cmdinfo_t alloc_cmd = {
1856     .name       = "alloc",
1857     .altname    = "a",
1858     .argmin     = 1,
1859     .argmax     = 2,
1860     .cfunc      = alloc_f,
1861     .args       = "off [sectors]",
1862     .oneline    = "checks if a sector is present in the file",
1863 };
1864
1865
1866 static int map_is_allocated(BlockDriverState *bs, int64_t sector_num,
1867                             int64_t nb_sectors, int64_t *pnum)
1868 {
1869     int num, num_checked;
1870     int ret, firstret;
1871
1872     num_checked = MIN(nb_sectors, INT_MAX);
1873     ret = bdrv_is_allocated(bs, sector_num, num_checked, &num);
1874     if (ret < 0) {
1875         return ret;
1876     }
1877
1878     firstret = ret;
1879     *pnum = num;
1880
1881     while (nb_sectors > 0 && ret == firstret) {
1882         sector_num += num;
1883         nb_sectors -= num;
1884
1885         num_checked = MIN(nb_sectors, INT_MAX);
1886         ret = bdrv_is_allocated(bs, sector_num, num_checked, &num);
1887         if (ret == firstret) {
1888             *pnum += num;
1889         } else {
1890             break;
1891         }
1892     }
1893
1894     return firstret;
1895 }
1896
1897 static int map_f(BlockDriverState *bs, int argc, char **argv)
1898 {
1899     int64_t offset;
1900     int64_t nb_sectors;
1901     char s1[64];
1902     int64_t num;
1903     int ret;
1904     const char *retstr;
1905
1906     offset = 0;
1907     nb_sectors = bs->total_sectors;
1908
1909     do {
1910         ret = map_is_allocated(bs, offset, nb_sectors, &num);
1911         if (ret < 0) {
1912             error_report("Failed to get allocation status: %s", strerror(-ret));
1913             return 0;
1914         }
1915
1916         retstr = ret ? "    allocated" : "not allocated";
1917         cvtstr(offset << 9ULL, s1, sizeof(s1));
1918         printf("[% 24" PRId64 "] % 8" PRId64 "/% 8" PRId64 " sectors %s "
1919                "at offset %s (%d)\n",
1920                offset << 9ULL, num, nb_sectors, retstr, s1, ret);
1921
1922         offset += num;
1923         nb_sectors -= num;
1924     } while (offset < bs->total_sectors);
1925
1926     return 0;
1927 }
1928
1929 static const cmdinfo_t map_cmd = {
1930        .name           = "map",
1931        .argmin         = 0,
1932        .argmax         = 0,
1933        .cfunc          = map_f,
1934        .args           = "",
1935        .oneline        = "prints the allocated areas of a file",
1936 };
1937
1938 static int break_f(BlockDriverState *bs, int argc, char **argv)
1939 {
1940     int ret;
1941
1942     ret = bdrv_debug_breakpoint(bs, argv[1], argv[2]);
1943     if (ret < 0) {
1944         printf("Could not set breakpoint: %s\n", strerror(-ret));
1945     }
1946
1947     return 0;
1948 }
1949
1950 static const cmdinfo_t break_cmd = {
1951        .name           = "break",
1952        .argmin         = 2,
1953        .argmax         = 2,
1954        .cfunc          = break_f,
1955        .args           = "event tag",
1956        .oneline        = "sets a breakpoint on event and tags the stopped "
1957                          "request as tag",
1958 };
1959
1960 static int resume_f(BlockDriverState *bs, int argc, char **argv)
1961 {
1962     int ret;
1963
1964     ret = bdrv_debug_resume(bs, argv[1]);
1965     if (ret < 0) {
1966         printf("Could not resume request: %s\n", strerror(-ret));
1967     }
1968
1969     return 0;
1970 }
1971
1972 static const cmdinfo_t resume_cmd = {
1973        .name           = "resume",
1974        .argmin         = 1,
1975        .argmax         = 1,
1976        .cfunc          = resume_f,
1977        .args           = "tag",
1978        .oneline        = "resumes the request tagged as tag",
1979 };
1980
1981 static int wait_break_f(BlockDriverState *bs, int argc, char **argv)
1982 {
1983     while (!bdrv_debug_is_suspended(bs, argv[1])) {
1984         qemu_aio_wait();
1985     }
1986
1987     return 0;
1988 }
1989
1990 static const cmdinfo_t wait_break_cmd = {
1991        .name           = "wait_break",
1992        .argmin         = 1,
1993        .argmax         = 1,
1994        .cfunc          = wait_break_f,
1995        .args           = "tag",
1996        .oneline        = "waits for the suspension of a request",
1997 };
1998
1999 static int abort_f(BlockDriverState *bs, int argc, char **argv)
2000 {
2001     abort();
2002 }
2003
2004 static const cmdinfo_t abort_cmd = {
2005        .name           = "abort",
2006        .cfunc          = abort_f,
2007        .flags          = CMD_NOFILE_OK,
2008        .oneline        = "simulate a program crash using abort(3)",
2009 };
2010
2011 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2012 {
2013     if (cmd) {
2014         printf("%s ", cmd);
2015     } else {
2016         printf("%s ", ct->name);
2017         if (ct->altname) {
2018             printf("(or %s) ", ct->altname);
2019         }
2020     }
2021
2022     if (ct->args) {
2023         printf("%s ", ct->args);
2024     }
2025     printf("-- %s\n", ct->oneline);
2026 }
2027
2028 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2029 {
2030     help_oneline(cmd, ct);
2031     if (ct->help) {
2032         ct->help();
2033     }
2034 }
2035
2036 static void help_all(void)
2037 {
2038     const cmdinfo_t *ct;
2039
2040     for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2041         help_oneline(ct->name, ct);
2042     }
2043     printf("\nUse 'help commandname' for extended help.\n");
2044 }
2045
2046 static int help_f(BlockDriverState *bs, int argc, char **argv)
2047 {
2048     const cmdinfo_t *ct;
2049
2050     if (argc == 1) {
2051         help_all();
2052         return 0;
2053     }
2054
2055     ct = find_command(argv[1]);
2056     if (ct == NULL) {
2057         printf("command %s not found\n", argv[1]);
2058         return 0;
2059     }
2060
2061     help_onecmd(argv[1], ct);
2062     return 0;
2063 }
2064
2065 static const cmdinfo_t help_cmd = {
2066     .name       = "help",
2067     .altname    = "?",
2068     .cfunc      = help_f,
2069     .argmin     = 0,
2070     .argmax     = 1,
2071     .flags      = CMD_FLAG_GLOBAL,
2072     .args       = "[command]",
2073     .oneline    = "help for one or all commands",
2074 };
2075
2076 bool qemuio_command(BlockDriverState *bs, const char *cmd)
2077 {
2078     char *input;
2079     const cmdinfo_t *ct;
2080     char **v;
2081     int c;
2082     bool done = false;
2083
2084     input = g_strdup(cmd);
2085     v = breakline(input, &c);
2086     if (c) {
2087         ct = find_command(v[0]);
2088         if (ct) {
2089             done = command(bs, ct, c, v);
2090         } else {
2091             fprintf(stderr, "command \"%s\" not found\n", v[0]);
2092         }
2093     }
2094     g_free(input);
2095     g_free(v);
2096
2097     return done;
2098 }
2099
2100 static void __attribute((constructor)) init_qemuio_commands(void)
2101 {
2102     /* initialize commands */
2103     qemuio_add_command(&help_cmd);
2104     qemuio_add_command(&read_cmd);
2105     qemuio_add_command(&readv_cmd);
2106     qemuio_add_command(&write_cmd);
2107     qemuio_add_command(&writev_cmd);
2108     qemuio_add_command(&multiwrite_cmd);
2109     qemuio_add_command(&aio_read_cmd);
2110     qemuio_add_command(&aio_write_cmd);
2111     qemuio_add_command(&aio_flush_cmd);
2112     qemuio_add_command(&flush_cmd);
2113     qemuio_add_command(&truncate_cmd);
2114     qemuio_add_command(&length_cmd);
2115     qemuio_add_command(&info_cmd);
2116     qemuio_add_command(&discard_cmd);
2117     qemuio_add_command(&alloc_cmd);
2118     qemuio_add_command(&map_cmd);
2119     qemuio_add_command(&break_cmd);
2120     qemuio_add_command(&resume_cmd);
2121     qemuio_add_command(&wait_break_cmd);
2122     qemuio_add_command(&abort_cmd);
2123 }