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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;
/*
* 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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57
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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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60
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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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64
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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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70
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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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242
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*total = qiov->size;
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260
|
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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261
|
" -b, -- read from the VM state rather than the virtual disk\n"
|
|
262
263
|
" -C, -- report statistics in a machine parsable format\n"
" -l, -- length for pattern verification (only with -P)\n"
|
|
264
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" -p, -- use bdrv_pread to read the file\n"
|
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265
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" -P, -- use a pattern to verify read data\n"
|
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266
|
" -q, -- quite mode, do not show I/O statistics\n"
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|
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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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272
273
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276
|
"\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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277
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int Pflag = 0, sflag = 0, lflag = 0, bflag = 0;
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278
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280
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int c, cnt;
char *buf;
int64_t offset;
|
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281
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283
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int count;
/* Some compilers get confused and warn if this is not initialized. */
int total = 0;
|
|
284
|
int pattern = 0, pattern_offset = 0, pattern_count = 0;
|
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285
|
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286
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while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != EOF) {
|
|
287
|
switch (c) {
|
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288
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290
|
case 'b':
bflag = 1;
break;
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|
291
292
293
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case 'C':
Cflag = 1;
break;
|
|
294
295
296
297
298
299
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301
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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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302
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304
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case 'p':
pflag = 1;
break;
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305
306
307
308
|
case 'P':
Pflag = 1;
pattern = atoi(optarg);
break;
|
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309
310
311
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case 'q':
qflag = 1;
break;
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312
313
314
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316
317
318
319
|
case 's':
sflag = 1;
pattern_offset = cvtnum(optarg);
if (pattern_offset < 0) {
printf("non-numeric length argument -- %s\n", optarg);
return 0;
}
break;
|
|
320
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|
case 'v':
vflag = 1;
break;
default:
return command_usage(&read_cmd);
}
}
if (optind != argc - 2)
return command_usage(&read_cmd);
|
|
331
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333
334
335
|
if (bflag && pflag) {
printf("-b and -p cannot be specified at the same time\n");
return 0;
}
|
|
336
337
338
339
340
341
342
343
344
345
346
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348
|
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;
}
|
|
349
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351
352
353
354
355
356
357
358
359
360
361
|
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;
}
|
|
362
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364
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368
369
370
371
372
373
374
375
376
377
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379
|
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);
|
|
380
381
|
else if (bflag)
cnt = do_load_vmstate(buf, offset, count, &total);
|
|
382
383
384
385
386
387
|
else
cnt = do_read(buf, offset, count, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("read failed: %s\n", strerror(-cnt));
|
|
388
|
goto out;
|
|
389
390
|
}
|
|
391
|
if (Pflag) {
|
|
392
393
394
|
void* cmp_buf = malloc(pattern_count);
memset(cmp_buf, pattern, pattern_count);
if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
|
|
395
396
|
printf("Pattern verification failed at offset %lld, "
"%d bytes\n",
|
|
397
|
(long long) offset + pattern_offset, pattern_count);
|
|
398
399
400
401
|
}
free(cmp_buf);
}
|
|
402
|
if (qflag)
|
|
403
|
goto out;
|
|
404
405
406
407
408
409
410
411
|
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);
|
|
412
|
out:
|
|
413
414
415
416
417
418
419
420
421
422
423
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t read_cmd = {
.name = "read",
.altname = "r",
.cfunc = read_f,
.argmin = 2,
.argmax = -1,
|
|
424
|
.args = "[-abCpqv] [-P pattern [-s off] [-l len]] off len",
|
|
425
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427
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429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
|
.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"
|
|
445
|
" -P, -- use a pattern to verify read data\n"
|
|
446
447
448
449
450
451
452
453
454
455
456
|
" -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;
|
|
457
|
char *buf;
|
|
458
|
int64_t offset;
|
|
459
460
|
int total;
int nr_iov;
|
|
461
|
QEMUIOVector qiov;
|
|
462
463
|
int pattern = 0;
int Pflag = 0;
|
|
464
|
|
|
465
|
while ((c = getopt(argc, argv, "CP:qv")) != EOF) {
|
|
466
467
468
469
|
switch (c) {
case 'C':
Cflag = 1;
break;
|
|
470
471
472
473
|
case 'P':
Pflag = 1;
pattern = atoi(optarg);
break;
|
|
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
|
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;
|
|
503
|
buf = create_iovec(&qiov, &argv[optind], nr_iov, 0xab);
|
|
504
505
506
507
508
509
510
|
gettimeofday(&t1, NULL);
cnt = do_aio_readv(&qiov, offset, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("readv failed: %s\n", strerror(-cnt));
|
|
511
|
goto out;
|
|
512
513
|
}
|
|
514
|
if (Pflag) {
|
|
515
516
517
|
void* cmp_buf = malloc(qiov.size);
memset(cmp_buf, pattern, qiov.size);
if (memcmp(buf, cmp_buf, qiov.size)) {
|
|
518
|
printf("Pattern verification failed at offset %lld, "
|
|
519
520
|
"%zd bytes\n",
(long long) offset, qiov.size);
|
|
521
522
523
524
|
}
free(cmp_buf);
}
|
|
525
|
if (qflag)
|
|
526
|
goto out;
|
|
527
528
529
530
531
532
533
534
|
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);
|
|
535
|
out:
|
|
536
537
538
539
540
541
542
543
544
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t readv_cmd = {
.name = "readv",
.cfunc = readv_f,
.argmin = 2,
.argmax = -1,
|
|
545
|
.args = "[-Cqv] [-P pattern ] off len [len..]",
|
|
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
|
.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"
|
|
564
|
" -b, -- write to the VM state rather than the virtual disk\n"
|
|
565
566
567
568
569
570
571
572
573
574
575
|
" -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;
|
|
576
|
int Cflag = 0, pflag = 0, qflag = 0, bflag = 0;
|
|
577
578
579
|
int c, cnt;
char *buf;
int64_t offset;
|
|
580
581
582
|
int count;
/* Some compilers get confused and warn if this is not initialized. */
int total = 0;
|
|
583
584
|
int pattern = 0xcd;
|
|
585
|
while ((c = getopt(argc, argv, "bCpP:q")) != EOF) {
|
|
586
|
switch (c) {
|
|
587
588
589
|
case 'b':
bflag = 1;
break;
|
|
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
|
case 'C':
Cflag = 1;
break;
case 'p':
pflag = 1;
break;
case 'P':
pattern = atoi(optarg);
break;
case 'q':
qflag = 1;
break;
default:
return command_usage(&write_cmd);
}
}
if (optind != argc - 2)
return command_usage(&write_cmd);
|
|
610
611
612
613
614
|
if (bflag && pflag) {
printf("-b and -p cannot be specified at the same time\n");
return 0;
}
|
|
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
|
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);
|
|
647
648
|
else if (bflag)
cnt = do_save_vmstate(buf, offset, count, &total);
|
|
649
650
651
652
653
654
|
else
cnt = do_write(buf, offset, count, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("write failed: %s\n", strerror(-cnt));
|
|
655
|
goto out;
|
|
656
657
658
|
}
if (qflag)
|
|
659
|
goto out;
|
|
660
661
662
663
664
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, count, total, cnt, Cflag);
|
|
665
|
out:
|
|
666
667
668
669
670
671
672
673
674
675
676
|
qemu_io_free(buf);
return 0;
}
static const cmdinfo_t write_cmd = {
.name = "write",
.altname = "w",
.cfunc = write_f,
.argmin = 2,
.argmax = -1,
|
|
677
|
.args = "[-abCpq] [-P pattern ] off len",
|
|
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
|
.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;
|
|
708
|
char *buf;
|
|
709
|
int64_t offset;
|
|
710
711
|
int total;
int nr_iov;
|
|
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
|
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':
pattern = atoi(optarg);
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;
|
|
748
|
buf = create_iovec(&qiov, &argv[optind], nr_iov, pattern);
|
|
749
750
751
752
753
754
755
|
gettimeofday(&t1, NULL);
cnt = do_aio_writev(&qiov, offset, &total);
gettimeofday(&t2, NULL);
if (cnt < 0) {
printf("writev failed: %s\n", strerror(-cnt));
|
|
756
|
goto out;
|
|
757
758
759
|
}
if (qflag)
|
|
760
|
goto out;
|
|
761
762
763
764
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, t1);
print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
|
|
765
|
out:
|
|
766
767
768
769
770
771
772
773
774
775
776
777
778
779
|
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,
};
|
|
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
|
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));
|
|
803
|
goto out;
|
|
804
805
|
}
|
|
806
|
if (ctx->qflag) {
|
|
807
|
goto out;
|
|
808
|
}
|
|
809
810
811
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, ctx->t1);
|
|
812
813
|
print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
ctx->qiov.size, 1, ctx->Cflag);
|
|
814
|
out:
|
|
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
|
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));
|
|
831
|
goto out;
|
|
832
833
834
|
}
if (ctx->Pflag) {
|
|
835
|
void *cmp_buf = malloc(ctx->qiov.size);
|
|
836
|
|
|
837
838
|
memset(cmp_buf, ctx->pattern, ctx->qiov.size);
if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
|
|
839
|
printf("Pattern verification failed at offset %lld, "
|
|
840
841
|
"%zd bytes\n",
(long long) ctx->offset, ctx->qiov.size);
|
|
842
843
844
845
|
}
free(cmp_buf);
}
|
|
846
|
if (ctx->qflag) {
|
|
847
|
goto out;
|
|
848
|
}
|
|
849
|
|
|
850
851
852
|
if (ctx->vflag) {
dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
}
|
|
853
854
855
|
/* Finally, report back -- -C gives a parsable format */
t2 = tsub(t2, ctx->t1);
|
|
856
857
|
print_report("read", &t2, ctx->offset, ctx->qiov.size,
ctx->qiov.size, 1, ctx->Cflag);
|
|
858
|
out:
|
|
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
|
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)
{
|
|
887
|
int nr_iov, c;
|
|
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
|
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;
ctx->pattern = atoi(optarg);
break;
case 'q':
ctx->qflag = 1;
break;
case 'v':
ctx->vflag = 1;
break;
default:
|
|
907
|
free(ctx);
|
|
908
909
910
911
|
return command_usage(&aio_read_cmd);
}
}
|
|
912
913
|
if (optind > argc - 2) {
free(ctx);
|
|
914
|
return command_usage(&aio_read_cmd);
|
|
915
|
}
|
|
916
917
918
919
|
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
|
|
920
|
free(ctx);
|
|
921
922
923
924
925
926
927
|
return 0;
}
optind++;
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
|
|
928
|
free(ctx);
|
|
929
930
931
932
|
return 0;
}
nr_iov = argc - optind;
|
|
933
|
ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, 0xab);
|
|
934
935
936
937
|
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_readv(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_read_done, ctx);
|
|
938
939
940
|
if (!acb) {
free(ctx->buf);
free(ctx);
|
|
941
|
return -EIO;
|
|
942
|
}
|
|
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
|
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)
{
|
|
984
|
int nr_iov, c;
|
|
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
|
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':
pattern = atoi(optarg);
break;
default:
|
|
1001
|
free(ctx);
|
|
1002
1003
1004
1005
|
return command_usage(&aio_write_cmd);
}
}
|
|
1006
1007
|
if (optind > argc - 2) {
free(ctx);
|
|
1008
|
return command_usage(&aio_write_cmd);
|
|
1009
|
}
|
|
1010
1011
1012
1013
|
ctx->offset = cvtnum(argv[optind]);
if (ctx->offset < 0) {
printf("non-numeric length argument -- %s\n", argv[optind]);
|
|
1014
|
free(ctx);
|
|
1015
1016
1017
1018
1019
1020
1021
|
return 0;
}
optind++;
if (ctx->offset & 0x1ff) {
printf("offset %lld is not sector aligned\n",
(long long)ctx->offset);
|
|
1022
|
free(ctx);
|
|
1023
1024
1025
1026
|
return 0;
}
nr_iov = argc - optind;
|
|
1027
|
ctx->buf = create_iovec(&ctx->qiov, &argv[optind], nr_iov, pattern);
|
|
1028
1029
1030
1031
|
gettimeofday(&ctx->t1, NULL);
acb = bdrv_aio_writev(bs, ctx->offset >> 9, &ctx->qiov,
ctx->qiov.size >> 9, aio_write_done, ctx);
|
|
1032
1033
1034
|
if (!acb) {
free(ctx->buf);
free(ctx);
|
|
1035
|
return -EIO;
|
|
1036
|
}
|
|
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
|
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"
};
|
|
1064
1065
1066
1067
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
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
|
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;
int nb_sectors;
char s1[64];
int num;
int ret;
|
|
1177
|
const char *retstr;
|
|
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
|
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;
ret = bdrv_is_allocated(bs, offset >> 9, nb_sectors, &num);
cvtstr(offset, s1, sizeof(s1));
|
|
1195
|
retstr = ret ? "allocated" : "not allocated";
|
|
1196
|
if (nb_sectors == 1)
|
|
1197
|
printf("sector %s at offset %s\n", retstr, s1);
|
|
1198
|
else
|
|
1199
1200
|
printf("%d/%d sectors %s at offset %s\n",
num, nb_sectors, retstr, s1);
|
|
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
|
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",
};
|
|
1229
|
static int openfile(char *name, int flags, int growable)
|
|
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
|
{
if (bs) {
fprintf(stderr, "file open already, try 'help close'\n");
return 1;
}
bs = bdrv_new("hda");
if (!bs)
return 1;
|
|
1240
1241
1242
1243
|
if (growable) {
flags |= BDRV_O_FILE;
}
|
|
1244
1245
1246
1247
1248
1249
|
if (bdrv_open(bs, name, flags) == -1) {
fprintf(stderr, "%s: can't open device %s\n", progname, name);
bs = NULL;
return 1;
}
|
|
1250
1251
1252
|
if (growable) {
bs->growable = 1;
}
|
|
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
|
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"
|
|
1271
|
" -g, -- allow file to grow (only applies to protocols)"
|
|
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
|
"\n");
}
static const cmdinfo_t open_cmd;
static int
open_f(int argc, char **argv)
{
int flags = 0;
int readonly = 0;
|
|
1282
|
int growable = 0;
|
|
1283
1284
|
int c;
|
|
1285
|
while ((c = getopt(argc, argv, "snCrg")) != EOF) {
|
|
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
|
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;
|
|
1299
1300
1301
|
case 'g':
growable = 1;
break;
|
|
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
|
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);
|
|
1315
|
return openfile(argv[optind], flags, growable);
|
|
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
|
}
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"
|
|
1357
|
"QEMU Disk exerciser\n"
|
|
1358
1359
1360
1361
1362
1363
|
"\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"
|
|
1364
|
" -g, --growable allow file to grow (only applies to protocols)\n"
|
|
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
|
" -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;
|
|
1376
1377
|
int growable = 0;
const char *sopt = "hVc:Crsnmg";
|
|
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
|
struct option lopt[] = {
{ "help", 0, 0, 'h' },
{ "version", 0, 0, 'V' },
{ "offset", 1, 0, 'o' },
{ "cmd", 1, 0, 'c' },
{ "create", 0, 0, 'C' },
{ "read-only", 0, 0, 'r' },
{ "snapshot", 0, 0, 's' },
{ "nocache", 0, 0, 'n' },
{ "misalign", 0, 0, 'm' },
|
|
1388
|
{ "growable", 0, 0, 'g' },
|
|
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
|
{ NULL, 0, 0, 0 }
};
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;
|
|
1417
1418
1419
|
case 'g':
growable = 1;
break;
|
|
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
|
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);
|
|
1448
1449
1450
|
add_command(&aio_read_cmd);
add_command(&aio_write_cmd);
add_command(&aio_flush_cmd);
|
|
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
|
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)
|
|
1467
|
openfile(argv[optind], flags, growable);
|
|
1468
1469
|
command_loop();
|
|
1470
1471
1472
1473
1474
|
/*
* Make sure all outstanding requests get flushed the program exits.
*/
qemu_aio_flush();
|
|
1475
1476
1477
1478
|
if (bs)
bdrv_close(bs);
return 0;
}
|