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/*
* Command line utility to exercise the QEMU I/O path.
*
* Copyright (C) 2009 Red Hat, Inc.
* Copyright (c) 2003-2005 Silicon Graphics, Inc.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include <sys/types.h>
#include <stdarg.h>
#include <stdio.h>
#include <getopt.h>
#include "qemu-common.h"
#include "block_int.h"
#include "cmd.h"
#define VERSION "0.0.1"
#define CMD_NOFILE_OK 0x01
char *progname;
static BlockDriverState *bs;
static int misalign;
/*
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* Parse the pattern argument to various sub-commands.
*
* Because the pattern is used as an argument to memset it must evaluate
* to an unsigned integer that fits into a single byte.
*/
static int parse_pattern(const char *arg)
{
char *endptr = NULL;
long pattern;
pattern = strtol(arg, &endptr, 0);
if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
printf("%s is not a valid pattern byte\n", arg);
return -1;
}
return pattern;
}
/*
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* Memory allocation helpers.
*
* Make sure memory is aligned by default, or purposefully misaligned if
* that is specified on the command line.
*/
#define MISALIGN_OFFSET 16
static void *qemu_io_alloc(size_t len, int pattern)
{
void *buf;
if (misalign)
len += MISALIGN_OFFSET;
buf = qemu_memalign(512, len);
memset(buf, pattern, len);
if (misalign)
buf += MISALIGN_OFFSET;
return buf;
}
static void qemu_io_free(void *p)
{
if (misalign)
p -= MISALIGN_OFFSET;
qemu_vfree(p);
}
static void
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dump_buffer(const void *buffer, int64_t offset, int len)
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{
int i, j;
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const uint8_t *p;
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for (i = 0, p = buffer; i < len; i += 16) {
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const uint8_t *s = p;
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printf("%08llx: ", (unsigned long long)offset + i);
for (j = 0; j < 16 && i + j < len; j++, p++)
printf("%02x ", *p);
printf(" ");
for (j = 0; j < 16 && i + j < len; j++, s++) {
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if (isalnum(*s))
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printf("%c", *s);
else
printf(".");
}
printf("\n");
}
}
static void
print_report(const char *op, struct timeval *t, int64_t offset,
int count, int total, int cnt, int Cflag)
{
char s1[64], s2[64], ts[64];
timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
if (!Cflag) {
cvtstr((double)total, s1, sizeof(s1));
cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
printf("%s %d/%d bytes at offset %lld\n",
op, total, count, (long long)offset);
printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
s1, cnt, ts, s2, tdiv((double)cnt, *t));
} else {/* bytes,ops,time,bytes/sec,ops/sec */
printf("%d,%d,%s,%.3f,%.3f\n",
total, cnt, ts,
tdiv((double)total, *t),
tdiv((double)cnt, *t));
}
}
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/*
* Parse multiple length statements for vectored I/O, and construct an I/O
* vector matching it.
*/
static void *
create_iovec(QEMUIOVector *qiov, char **argv, int nr_iov, int pattern)
{
size_t *sizes = calloc(nr_iov, sizeof(size_t));
size_t count = 0;
void *buf, *p;
int i;
for (i = 0; i < nr_iov; i++) {
char *arg = argv[i];
long long len;
len = cvtnum(arg);
if (len < 0) {
printf("non-numeric length argument -- %s\n", arg);
return NULL;
}
/* should be SIZE_T_MAX, but that doesn't exist */
if (len > UINT_MAX) {
printf("too large length argument -- %s\n", arg);
return NULL;
}
if (len & 0x1ff) {
printf("length argument %lld is not sector aligned\n",
len);
return NULL;
}
sizes[i] = len;
count += len;
}
qemu_iovec_init(qiov, nr_iov);
buf = p = qemu_io_alloc(count, pattern);
for (i = 0; i < nr_iov; i++) {
qemu_iovec_add(qiov, p, sizes[i]);
p += sizes[i];
}
free(sizes);
return buf;
}
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static int do_read(char *buf, int64_t offset, int count, int *total)
{
int ret;
ret = bdrv_read(bs, offset >> 9, (uint8_t *)buf, count >> 9);
if (ret < 0)
return ret;
*total = count;
return 1;
}
static int do_write(char *buf, int64_t offset, int count, int *total)
{
int ret;
ret = bdrv_write(bs, offset >> 9, (uint8_t *)buf, count >> 9);
if (ret < 0)
return ret;
*total = count;
return 1;
}
static int do_pread(char *buf, int64_t offset, int count, int *total)
{
*total = bdrv_pread(bs, offset, (uint8_t *)buf, count);
if (*total < 0)
return *total;
return 1;
}
static int do_pwrite(char *buf, int64_t offset, int count, int *total)
{
*total = bdrv_pwrite(bs, offset, (uint8_t *)buf, count);
if (*total < 0)
return *total;
return 1;
}
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static int do_load_vmstate(char *buf, int64_t offset, int count, int *total)
{
*total = bdrv_load_vmstate(bs, (uint8_t *)buf, offset, count);
if (*total < 0)
return *total;
return 1;
}
static int do_save_vmstate(char *buf, int64_t offset, int count, int *total)
{
*total = bdrv_save_vmstate(bs, (uint8_t *)buf, offset, count);
if (*total < 0)
return *total;
return 1;
}
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#define NOT_DONE 0x7fffffff
static void aio_rw_done(void *opaque, int ret)
{
*(int *)opaque = ret;
}
static int do_aio_readv(QEMUIOVector *qiov, int64_t offset, int *total)
{
BlockDriverAIOCB *acb;
int async_ret = NOT_DONE;
acb = bdrv_aio_readv(bs, offset >> 9, qiov, qiov->size >> 9,
aio_rw_done, &async_ret);
if (!acb)
return -EIO;
while (async_ret == NOT_DONE)
qemu_aio_wait();
*total = qiov->size;
return async_ret < 0 ? async_ret : 1;
}
static int do_aio_writev(QEMUIOVector *qiov, int64_t offset, int *total)
{
BlockDriverAIOCB *acb;
int async_ret = NOT_DONE;
acb = bdrv_aio_writev(bs, offset >> 9, qiov, qiov->size >> 9,
aio_rw_done, &async_ret);
if (!acb)
return -EIO;
while (async_ret == NOT_DONE)
qemu_aio_wait();
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*total = qiov->size;
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return async_ret < 0 ? async_ret : 1;
}
static const cmdinfo_t read_cmd;
static void
read_help(void)
{
printf(
"\n"
" reads a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
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" -b, -- read from the VM state rather than the virtual disk\n"
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" -C, -- report statistics in a machine parsable format\n"
" -l, -- length for pattern verification (only with -P)\n"
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" -p, -- use bdrv_pread to read the file\n"
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" -P, -- use a pattern to verify read data\n"
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" -q, -- quite mode, do not show I/O statistics\n"
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" -s, -- start offset for pattern verification (only with -P)\n"
" -v, -- dump buffer to standard output\n"
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"\n");
}
static int
read_f(int argc, char **argv)
{
struct timeval t1, t2;
int Cflag = 0, pflag = 0, qflag = 0, vflag = 0;
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int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
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int c, cnt;
char *buf;
int64_t offset;
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int count;
/* Some compilers get confused and warn if this is not initialized. */
int total = 0;
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304
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int pattern = 0, pattern_offset = 0, pattern_count = 0;
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while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
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switch (c) {
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case 'b':
bflag = 1;
break;
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case 'C':
Cflag = 1;
break;
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case 'l':
lflag = 1;
pattern_count = cvtnum(optarg);
if (pattern_count < 0) {
printf("non-numeric length argument -- %s\n", optarg);
return 0;
}
break;
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case 'p':
pflag = 1;
break;
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case 'P':
Pflag = 1;
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pattern = parse_pattern(optarg);
if (pattern < 0)
return 0;
|
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break;
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case 'q':
qflag = 1;
break;
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case 's':
sflag = 1;
pattern_offset = cvtnum(optarg);
if (pattern_offset < 0) {
printf("non-numeric length argument -- %s\n", optarg);
return 0;
}
break;
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case 'v':
vflag = 1;
break;
default:
return command_usage(&read_cmd);
}
}
if (optind != argc - 2)
return command_usage(&read_cmd);
|
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357
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if (bflag && pflag) {
printf("-b and -p cannot be specified at the same time\n");
return 0;
}
|
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370
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offset = cvtnum(argv[optind]);
if (offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
return 0;
}
optind++;
count = cvtnum(argv[optind]);
if (count < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
return 0;
}
|
|
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375
376
377
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380
381
382
383
|
if (!Pflag && (lflag || sflag)) {
return command_usage(&read_cmd);
}
if (!lflag) {
pattern_count = count - pattern_offset;
}
if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
printf("pattern verfication range exceeds end of read data\n");
return 0;
}
|
|
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390
391
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393
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|
if (!pflag)
if (offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)offset);
return 0;
if (count & 0x1ff) {
printf("count %d is not sector aligned\n",
count);
return 0;
}
}
buf = qemu_io_alloc(count, 0xab);
gettimeofday(&t1, NULL);
if (pflag)
cnt = do_pread(buf, offset, count, &total);
|
|
402
403
|
else if (bflag)
cnt = do_load_vmstate(buf, offset, count, &total);
|
|
404
405
406
407
408
409
|
else
cnt = do_read(buf, offset, count, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("read failed: %s\n", strerror(-cnt));
|
|
410
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goto out;
|
|
411
412
|
}
|
|
413
|
if (Pflag) {
|
|
414
415
416
|
void* cmp_buf = malloc(pattern_count);
memset(cmp_buf, pattern, pattern_count);
if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
|
|
417
418
|
printf("Pattern verification failed at offset %lld, "
"%d bytes\n",
|
|
419
|
(long long) offset + pattern_offset, pattern_count);
|
|
420
421
422
423
|
}
free(cmp_buf);
}
|
|
424
|
if (qflag)
|
|
425
|
goto out;
|
|
426
427
428
429
430
431
432
433
|
if (vflag)
dump_buffer(buf, offset, count);
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("read", &t2, offset, count, total, cnt, Cflag);
|
|
434
|
out:
|
|
435
436
437
438
439
440
441
442
443
444
445
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t read_cmd = {
.name = "read",
.altname = "r",
.cfunc = read_f,
.argmin = 2,
.argmax = -1,
|
|
446
|
.args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
|
|
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
|
.oneline = "reads a number of bytes at a specified offset",
.help = read_help,
};
static const cmdinfo_t readv_cmd;
static void
readv_help(void)
{
printf(
"\n"
" reads a range of bytes from the given offset into multiple buffers\n"
"\n"
" Example:\n"
" 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
" Uses multiple iovec buffers if more than one byte range is specified.\n"
" -C, -- report statistics in a machine parsable format\n"
|
|
467
|
" -P, -- use a pattern to verify read data\n"
|
|
468
469
470
471
472
473
474
475
476
477
478
|
" -v, -- dump buffer to standard output\n"
" -q, -- quite mode, do not show I/O statistics\n"
"\n");
}
static int
readv_f(int argc, char **argv)
{
struct timeval t1, t2;
int Cflag = 0, qflag = 0, vflag = 0;
int c, cnt;
|
|
479
|
char *buf;
|
|
480
|
int64_t offset;
|
|
481
482
|
int total;
int nr_iov;
|
|
483
|
QEMUIOVector qiov;
|
|
484
485
|
int pattern = 0;
int Pflag = 0;
|
|
486
|
|
|
487
|
while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
|
|
488
489
490
491
|
switch (c) {
case 'C':
Cflag = 1;
break;
|
|
492
493
|
case 'P':
Pflag = 1;
|
|
494
495
496
|
pattern = parse_pattern(optarg);
if (pattern < 0)
return 0;
|
|
497
|
break;
|
|
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
|
case 'q':
qflag = 1;
break;
case 'v':
vflag = 1;
break;
default:
return command_usage(&readv_cmd);
}
}
if (optind > argc - 2)
return command_usage(&readv_cmd);
offset = cvtnum(argv[optind]);
if (offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
return 0;
}
optind++;
if (offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)offset);
return 0;
}
nr_iov = argc - optind;
|
|
527
|
buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
|
|
528
529
530
531
532
533
534
|
gettimeofday(&t1, NULL);
cnt = do_aio_readv(&qiov, offset, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("readv failed: %s\n", strerror(-cnt));
|
|
535
|
goto out;
|
|
536
537
|
}
|
|
538
|
if (Pflag) {
|
|
539
540
541
|
void* cmp_buf = malloc(qiov.size);
memset(cmp_buf, pattern, qiov.size);
if (memcmp(buf, cmp_buf, qiov.size)) {
|
|
542
|
printf("Pattern verification failed at offset %lld, "
|
|
543
544
|
"%zd bytes\n",
(long long) offset, qiov.size);
|
|
545
546
547
548
|
}
free(cmp_buf);
}
|
|
549
|
if (qflag)
|
|
550
|
goto out;
|
|
551
552
553
554
555
556
557
558
|
if (vflag)
dump_buffer(buf, offset, qiov.size);
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
|
|
559
|
out:
|
|
560
561
562
563
564
565
566
567
568
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t readv_cmd = {
.name = "readv",
.cfunc = readv_f,
.argmin = 2,
.argmax = -1,
|
|
569
|
.args = "[-Cqv] [-P pattern ] off len [len..]",
|
|
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
|
.oneline = "reads a number of bytes at a specified offset",
.help = readv_help,
};
static const cmdinfo_t write_cmd;
static void
write_help(void)
{
printf(
"\n"
" writes a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd).\n"
|
|
588
|
" -b, -- write to the VM state rather than the virtual disk\n"
|
|
589
590
591
592
593
594
595
596
597
598
599
|
" -p, -- use bdrv_pwrite to write the file\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
" -q, -- quite mode, do not show I/O statistics\n"
"\n");
}
static int
write_f(int argc, char **argv)
{
struct timeval t1, t2;
|
|
600
|
int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
|
|
601
602
603
|
int c, cnt;
char *buf;
int64_t offset;
|
|
604
605
606
|
int count;
/* Some compilers get confused and warn if this is not initialized. */
int total = 0;
|
|
607
608
|
int pattern = 0xcd;
|
|
609
|
while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
|
|
610
|
switch (c) {
|
|
611
612
613
|
case 'b':
bflag = 1;
break;
|
|
614
615
616
617
618
619
620
|
case 'C':
Cflag = 1;
break;
case 'p':
pflag = 1;
break;
case 'P':
|
|
621
622
623
|
pattern = parse_pattern(optarg);
if (pattern < 0)
return 0;
|
|
624
625
626
627
628
629
630
631
632
633
634
635
|
break;
case 'q':
qflag = 1;
break;
default:
return command_usage(&write_cmd);
}
}
if (optind != argc - 2)
return command_usage(&write_cmd);
|
|
636
637
638
639
640
|
if (bflag && pflag) {
printf("-b and -p cannot be specified at the same time\n");
return 0;
}
|
|
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
|
offset = cvtnum(argv[optind]);
if (offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
return 0;
}
optind++;
count = cvtnum(argv[optind]);
if (count < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
return 0;
}
if (!pflag) {
if (offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)offset);
return 0;
}
if (count & 0x1ff) {
printf("count %d is not sector aligned\n",
count);
return 0;
}
}
buf = qemu_io_alloc(count, pattern);
gettimeofday(&t1, NULL);
if (pflag)
cnt = do_pwrite(buf, offset, count, &total);
|
|
673
674
|
else if (bflag)
cnt = do_save_vmstate(buf, offset, count, &total);
|
|
675
676
677
678
679
680
|
else
cnt = do_write(buf, offset, count, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("write failed: %s\n", strerror(-cnt));
|
|
681
|
goto out;
|
|
682
683
684
|
}
if (qflag)
|
|
685
|
goto out;
|
|
686
687
688
689
690
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, count, total, cnt, Cflag);
|
|
691
|
out:
|
|
692
693
694
695
696
697
698
699
700
701
702
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t write_cmd = {
.name = "write",
.altname = "w",
.cfunc = write_f,
.argmin = 2,
.argmax = -1,
|
|
703
|
.args = "[-abCpq] [-P pattern ] off len",
|
|
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
|
.oneline = "writes a number of bytes at a specified offset",
.help = write_help,
};
static const cmdinfo_t writev_cmd;
static void
writev_help(void)
{
printf(
"\n"
" writes a range of bytes from the given offset source from multiple buffers\n"
"\n"
" Example:\n"
" 'write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd).\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
" -q, -- quite mode, do not show I/O statistics\n"
"\n");
}
static int
writev_f(int argc, char **argv)
{
struct timeval t1, t2;
int Cflag = 0, qflag = 0;
int c, cnt;
|
|
734
|
char *buf;
|
|
735
|
int64_t offset;
|
|
736
737
|
int total;
int nr_iov;
|
|
738
739
740
741
742
743
744
745
746
747
748
749
|
int pattern = 0xcd;
QEMUIOVector qiov;
while ((c = getopt(argc, argv, "CqP:")) != EOF) {
switch (c) {
case 'C':
Cflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'P':
|
|
750
751
752
|
pattern = parse_pattern(optarg);
if (pattern < 0)
return 0;
|
|
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
|
break;
default:
return command_usage(&writev_cmd);
}
}
if (optind > argc - 2)
return command_usage(&writev_cmd);
offset = cvtnum(argv[optind]);
if (offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
return 0;
}
optind++;
if (offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)offset);
return 0;
}
nr_iov = argc - optind;
|
|
776
|
buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
|
|
777
778
779
780
781
782
783
|
gettimeofday(&t1, NULL);
cnt = do_aio_writev(&qiov, offset, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("writev failed: %s\n", strerror(-cnt));
|
|
784
|
goto out;
|
|
785
786
787
|
}
if (qflag)
|
|
788
|
goto out;
|
|
789
790
791
792
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
|
|
793
|
out:
|
|
794
795
796
797
798
799
800
801
802
803
804
805
806
807
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t writev_cmd = {
.name = "writev",
.cfunc = writev_f,
.argmin = 2,
.argmax = -1,
.args = "[-Cq] [-P pattern ] off len [len..]",
.oneline = "writes a number of bytes at a specified offset",
.help = writev_help,
};
|
|
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
|
struct aio_ctx {
QEMUIOVector qiov;
int64_t offset;
char *buf;
int qflag;
int vflag;
int Cflag;
int Pflag;
int pattern;
struct timeval t1;
};
static void
aio_write_done(void *opaque, int ret)
{
struct aio_ctx *ctx = opaque;
struct timeval t2;
gettimeofday(&t2, NULL);
if (ret < 0) {
printf("aio_write failed: %s\n", strerror(-ret));
|
|
831
|
goto out;
|
|
832
833
|
}
|
|
834
|
if (ctx->qflag) {
|
|
835
|
goto out;
|
|
836
|
}
|
|
837
838
839
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, ctx->t1);
|
|
840
841
|
print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
ctx->qiov.size, 1, ctx->Cflag);
|
|
842
|
out:
|
|
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
|
qemu_io_free(ctx->buf);
free(ctx);
}
static const cmdinfo_t aio_read_cmd;
static void
aio_read_done(void *opaque, int ret)
{
struct aio_ctx *ctx = opaque;
struct timeval t2;
gettimeofday(&t2, NULL);
if (ret < 0) {
printf("readv failed: %s\n", strerror(-ret));
|
|
859
|
goto out;
|
|
860
861
862
|
}
if (ctx->Pflag) {
|
|
863
|
void *cmp_buf = malloc(ctx->qiov.size);
|
|
864
|
|
|
865
866
|
memset(cmp_buf, ctx->pattern, ctx->qiov.size);
if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
|
|
867
|
printf("Pattern verification failed at offset %lld, "
|
|
868
869
|
"%zd bytes\n",
(long long) ctx->offset, ctx->qiov.size);
|
|
870
871
872
873
|
}
free(cmp_buf);
}
|
|
874
|
if (ctx->qflag) {
|
|
875
|
goto out;
|
|
876
|
}
|
|
877
|
|
|
878
879
880
|
if (ctx->vflag) {
dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
}
|
|
881
882
883
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, ctx->t1);
|
|
884
885
|
print_report("read", &t2, ctx->offset, ctx->qiov.size,
ctx->qiov.size, 1, ctx->Cflag);
|
|
886
|
out:
|
|
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
|
qemu_io_free(ctx->buf);
free(ctx);
}
static void
aio_read_help(void)
{
printf(
"\n"
" asynchronously reads a range of bytes from the given offset\n"
"\n"
" Example:\n"
" 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
"\n"
" Reads a segment of the currently open file, optionally dumping it to the\n"
" standard output stream (with -v option) for subsequent inspection.\n"
" The read is performed asynchronously and should the aio_flush command \n"
" should be used to ensure all outstanding aio requests have been completed\n"
" -C, -- report statistics in a machine parsable format\n"
" -P, -- use a pattern to verify read data\n"
" -v, -- dump buffer to standard output\n"
" -q, -- quite mode, do not show I/O statistics\n"
"\n");
}
static int
aio_read_f(int argc, char **argv)
{
|
|
915
|
int nr_iov, c;
|
|
916
917
918
919
920
921
922
923
924
925
|
struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
BlockDriverAIOCB *acb;
while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
switch (c) {
case 'C':
ctx->Cflag = 1;
break;
case 'P':
ctx->Pflag = 1;
|
|
926
927
928
|
ctx->pattern = parse_pattern(optarg);
if (ctx->pattern < 0)
return 0;
|
|
929
930
931
932
933
934
935
936
|
break;
case 'q':
ctx->qflag = 1;
break;
case 'v':
ctx->vflag = 1;
break;
default:
|
|
937
|
free(ctx);
|
|
938
939
940
941
|
return command_usage(&aio_read_cmd);
}
}
|
|
942
943
|
if (optind > argc - 2) {
free(ctx);
|
|
944
|
return command_usage(&aio_read_cmd);
|
|
945
|
}
|
|
946
947
948
949
|
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
|
|
950
|
free(ctx);
|
|
951
952
953
954
955
956
957
|
return 0;
}
optind++;
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
|
|
958
|
free(ctx);
|
|
959
960
961
962
|
return 0;
}
nr_iov = argc - optind;
|
|
963
|
ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
|
|
964
965
966
967
|
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_read_done, ctx);
|
|
968
969
970
|
if (!acb) {
free(ctx->buf);
free(ctx);
|
|
971
|
return -EIO;
|
|
972
|
}
|
|
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
|
return 0;
}
static const cmdinfo_t aio_read_cmd = {
.name = "aio_read",
.cfunc = aio_read_f,
.argmin = 2,
.argmax = -1,
.args = "[-Cqv] [-P pattern ] off len [len..]",
.oneline = "asynchronously reads a number of bytes",
.help = aio_read_help,
};
static const cmdinfo_t aio_write_cmd;
static void
aio_write_help(void)
{
printf(
"\n"
" asynchronously writes a range of bytes from the given offset source \n"
" from multiple buffers\n"
"\n"
" Example:\n"
" 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
"\n"
" Writes into a segment of the currently open file, using a buffer\n"
" filled with a set pattern (0xcdcdcdcd).\n"
" The write is performed asynchronously and should the aio_flush command \n"
" should be used to ensure all outstanding aio requests have been completed\n"
" -P, -- use different pattern to fill file\n"
" -C, -- report statistics in a machine parsable format\n"
" -q, -- quite mode, do not show I/O statistics\n"
"\n");
}
static int
aio_write_f(int argc, char **argv)
{
|
|
1014
|
int nr_iov, c;
|
|
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
|
int pattern = 0xcd;
struct aio_ctx *ctx = calloc(1, sizeof(struct aio_ctx));
BlockDriverAIOCB *acb;
while ((c = getopt(argc, argv, "CqP:")) != EOF) {
switch (c) {
case 'C':
ctx->Cflag = 1;
break;
case 'q':
ctx->qflag = 1;
break;
case 'P':
|
|
1028
1029
1030
|
pattern = parse_pattern(optarg);
if (pattern < 0)
return 0;
|
|
1031
1032
|
break;
default:
|
|
1033
|
free(ctx);
|
|
1034
1035
1036
1037
|
return command_usage(&aio_write_cmd);
}
}
|
|
1038
1039
|
if (optind > argc - 2) {
free(ctx);
|
|
1040
|
return command_usage(&aio_write_cmd);
|
|
1041
|
}
|
|
1042
1043
1044
1045
|
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
|
|
1046
|
free(ctx);
|
|
1047
1048
1049
1050
1051
1052
1053
|
return 0;
}
optind++;
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
|
|
1054
|
free(ctx);
|
|
1055
1056
1057
1058
|
return 0;
}
nr_iov = argc - optind;
|
|
1059
|
ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
|
|
1060
1061
1062
1063
|
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_write_done, ctx);
|
|
1064
1065
1066
|
if (!acb) {
free(ctx->buf);
free(ctx);
|
|
1067
|
return -EIO;
|
|
1068
|
}
|
|
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
|
return 0;
}
static const cmdinfo_t aio_write_cmd = {
.name = "aio_write",
.cfunc = aio_write_f,
.argmin = 2,
.argmax = -1,
.args = "[-Cq] [-P pattern ] off len [len..]",
.oneline = "asynchronously writes a number of bytes",
.help = aio_write_help,
};
static int
aio_flush_f(int argc, char **argv)
{
qemu_aio_flush();
return 0;
}
static const cmdinfo_t aio_flush_cmd = {
.name = "aio_flush",
.cfunc = aio_flush_f,
.oneline = "completes all outstanding aio requets"
};
|
|
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
|
static int
flush_f(int argc, char **argv)
{
bdrv_flush(bs);
return 0;
}
static const cmdinfo_t flush_cmd = {
.name = "flush",
.altname = "f",
.cfunc = flush_f,
.oneline = "flush all in-core file state to disk",
};
static int
truncate_f(int argc, char **argv)
{
int64_t offset;
int ret;
offset = cvtnum(argv[1]);
if (offset < 0) {
printf("non-numeric truncate argument -- %s\n", argv[1]);
return 0;
}
ret = bdrv_truncate(bs, offset);
if (ret < 0) {
printf("truncate: %s", strerror(ret));
return 0;
}
return 0;
}
static const cmdinfo_t truncate_cmd = {
.name = "truncate",
.altname = "t",
.cfunc = truncate_f,
.argmin = 1,
.argmax = 1,
.args = "off",
.oneline = "truncates the current file at the given offset",
};
static int
length_f(int argc, char **argv)
{
int64_t size;
char s1[64];
size = bdrv_getlength(bs);
if (size < 0) {
printf("getlength: %s", strerror(size));
return 0;
}
cvtstr(size, s1, sizeof(s1));
printf("%s\n", s1);
return 0;
}
static const cmdinfo_t length_cmd = {
.name = "length",
.altname = "l",
.cfunc = length_f,
.oneline = "gets the length of the current file",
};
static int
info_f(int argc, char **argv)
{
BlockDriverInfo bdi;
char s1[64], s2[64];
int ret;
if (bs->drv && bs->drv->format_name)
printf("format name: %s\n", bs->drv->format_name);
if (bs->drv && bs->drv->protocol_name)
printf("format name: %s\n", bs->drv->protocol_name);
ret = bdrv_get_info(bs, &bdi);
if (ret)
return 0;
cvtstr(bdi.cluster_size, s1, sizeof(s1));
cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
printf("cluster size: %s\n", s1);
printf("vm state offset: %s\n", s2);
return 0;
}
static const cmdinfo_t info_cmd = {
.name = "info",
.altname = "i",
.cfunc = info_f,
.oneline = "prints information about the current file",
};
static int
alloc_f(int argc, char **argv)
{
int64_t offset;
|
|
1205
|
int nb_sectors, remaining;
|
|
1206
|
char s1[64];
|
|
1207
|
int num, sum_alloc;
|
|
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
|
int ret;
offset = cvtnum(argv[1]);
if (offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)offset);
return 0;
}
if (argc == 3)
nb_sectors = cvtnum(argv[2]);
else
nb_sectors = 1;
|
|
1222
1223
1224
1225
1226
1227
1228
1229
1230
|
remaining = nb_sectors;
sum_alloc = 0;
while (remaining) {
ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
remaining -= num;
if (ret) {
sum_alloc += num;
}
}
|
|
1231
1232
1233
1234
|
cvtstr(offset, s1, sizeof(s1));
if (nb_sectors == 1)
|
|
1235
|
printf("sector allocated at offset %s\n", s1);
|
|
1236
|
else
|
|
1237
1238
|
printf("%d/%d sectors allocated at offset %s\n",
sum_alloc, nb_sectors, s1);
|
|
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
|
return 0;
}
static const cmdinfo_t alloc_cmd = {
.name = "alloc",
.altname = "a",
.argmin = 1,
.argmax = 2,
.cfunc = alloc_f,
.args = "off [sectors]",
.oneline = "checks if a sector is present in the file",
};
static int
close_f(int argc, char **argv)
{
bdrv_close(bs);
bs = NULL;
return 0;
}
static const cmdinfo_t close_cmd = {
.name = "close",
.altname = "c",
.cfunc = close_f,
.oneline = "close the current open file",
};
|
|
1267
|
static int openfile(char *name, int flags, int growable)
|
|
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
|
{
if (bs) {
fprintf(stderr, "file open already, try 'help close'\n");
return 1;
}
bs = bdrv_new("hda");
if (!bs)
return 1;
|
|
1278
1279
1280
1281
|
if (growable) {
flags |= BDRV_O_FILE;
}
|
|
1282
1283
1284
1285
1286
1287
|
if (bdrv_open(bs, name, flags) == -1) {
fprintf(stderr, "%s: can't open device %s\n", progname, name);
bs = NULL;
return 1;
}
|
|
1288
1289
1290
|
if (growable) {
bs->growable = 1;
}
|
|
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
|
return 0;
}
static void
open_help(void)
{
printf(
"\n"
" opens a new file in the requested mode\n"
"\n"
" Example:\n"
" 'open -Cn /tmp/data' - creates/opens data file read-write and uncached\n"
"\n"
" Opens a file for subsequent use by all of the other qemu-io commands.\n"
" -C, -- create new file if it doesn't exist\n"
" -r, -- open file read-only\n"
" -s, -- use snapshot file\n"
" -n, -- disable host cache\n"
|
|
1309
|
" -g, -- allow file to grow (only applies to protocols)"
|
|
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
|
"\n");
}
static const cmdinfo_t open_cmd;
static int
open_f(int argc, char **argv)
{
int flags = 0;
int readonly = 0;
|
|
1320
|
int growable = 0;
|
|
1321
1322
|
int c;
|
|
1323
|
while ((c = getopt(argc, argv, "snCrg")) != EOF) {
|
|
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
|
switch (c) {
case 's':
flags |= BDRV_O_SNAPSHOT;
break;
case 'n':
flags |= BDRV_O_NOCACHE;
break;
case 'C':
flags |= BDRV_O_CREAT;
break;
case 'r':
readonly = 1;
break;
|
|
1337
1338
1339
|
case 'g':
growable = 1;
break;
|
|
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
|
default:
return command_usage(&open_cmd);
}
}
if (readonly)
flags |= BDRV_O_RDONLY;
else
flags |= BDRV_O_RDWR;
if (optind != argc - 1)
return command_usage(&open_cmd);
|
|
1353
|
return openfile(argv[optind], flags, growable);
|
|
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
|
}
static const cmdinfo_t open_cmd = {
.name = "open",
.altname = "o",
.cfunc = open_f,
.argmin = 1,
.argmax = -1,
.flags = CMD_NOFILE_OK,
.args = "[-Crsn] [path]",
.oneline = "open the file specified by path",
.help = open_help,
};
static int
init_args_command(
int index)
{
/* only one device allowed so far */
if (index >= 1)
return 0;
return ++index;
}
static int
init_check_command(
const cmdinfo_t *ct)
{
if (ct->flags & CMD_FLAG_GLOBAL)
return 1;
if (!(ct->flags & CMD_NOFILE_OK) && !bs) {
fprintf(stderr, "no file open, try 'help open'\n");
return 0;
}
return 1;
}
static void usage(const char *name)
{
printf(
"Usage: %s [-h] [-V] [-Crsnm] [-c cmd] ... [file]\n"
|
|
1395
|
"QEMU Disk exerciser\n"
|
|
1396
1397
1398
1399
1400
1401
|
"\n"
" -C, --create create new file if it doesn't exist\n"
" -c, --cmd command to execute\n"
" -r, --read-only export read-only\n"
" -s, --snapshot use snapshot file\n"
" -n, --nocache disable host cache\n"
|
|
1402
|
" -g, --growable allow file to grow (only applies to protocols)\n"
|
|
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
|
" -m, --misalign misalign allocations for O_DIRECT\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
"\n",
name);
}
int main(int argc, char **argv)
{
int readonly = 0;
|
|
1414
1415
|
int growable = 0;
const char *sopt = "hVc:Crsnmg";
|
|
1416
|
struct option lopt[] = {
|
|
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
|
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'V' },
{ "offset", 1, NULL, 'o' },
{ "cmd", 1, NULL, 'c' },
{ "create", 0, NULL, 'C' },
{ "read-only", 0, NULL, 'r' },
{ "snapshot", 0, NULL, 's' },
{ "nocache", 0, NULL, 'n' },
{ "misalign", 0, NULL, 'm' },
{ "growable", 0, NULL, 'g' },
{ NULL, 0, NULL, 0 }
|
|
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
|
};
int c;
int opt_index = 0;
int flags = 0;
progname = basename(argv[0]);
while ((c = getopt_long(argc, argv, sopt, lopt, &opt_index)) != -1) {
switch (c) {
case 's':
flags |= BDRV_O_SNAPSHOT;
break;
case 'n':
flags |= BDRV_O_NOCACHE;
break;
case 'c':
add_user_command(optarg);
break;
case 'C':
flags |= BDRV_O_CREAT;
break;
case 'r':
readonly = 1;
break;
case 'm':
misalign = 1;
break;
|
|
1455
1456
1457
|
case 'g':
growable = 1;
break;
|
|
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
|
case 'V':
printf("%s version %s\n", progname, VERSION);
exit(0);
case 'h':
usage(progname);
exit(0);
default:
usage(progname);
exit(1);
}
}
if ((argc - optind) > 1) {
usage(progname);
exit(1);
}
bdrv_init();
/* initialize commands */
quit_init();
help_init();
add_command(&open_cmd);
add_command(&close_cmd);
add_command(&read_cmd);
add_command(&readv_cmd);
add_command(&write_cmd);
add_command(&writev_cmd);
|
|
1486
1487
1488
|
add_command(&aio_read_cmd);
add_command(&aio_write_cmd);
add_command(&aio_flush_cmd);
|
|
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
|
add_command(&flush_cmd);
add_command(&truncate_cmd);
add_command(&length_cmd);
add_command(&info_cmd);
add_command(&alloc_cmd);
add_args_command(init_args_command);
add_check_command(init_check_command);
/* open the device */
if (readonly)
flags |= BDRV_O_RDONLY;
else
flags |= BDRV_O_RDWR;
if ((argc - optind) == 1)
|
|
1505
|
openfile(argv[optind], flags, growable);
|
|
1506
1507
|
command_loop();
|
|
1508
1509
1510
1511
1512
|
/*
* Make sure all outstanding requests get flushed the program exits.
*/
qemu_aio_flush();
|
|
1513
1514
1515
1516
|
if (bs)
bdrv_close(bs);
return 0;
}
|