2 * Command line utility to exercise the QEMU I/O path.
4 * Copyright (C) 2009-2016 Red Hat, Inc.
5 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
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.
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
14 #include "sysemu/block-backend.h"
15 #include "block/block.h"
16 #include "block/block_int.h" /* for info_f() */
17 #include "block/qapi.h"
18 #include "qemu/error-report.h"
19 #include "qemu/main-loop.h"
20 #include "qemu/timer.h"
21 #include "sysemu/block-backend.h"
22 #include "qemu/cutils.h"
24 #define CMD_NOFILE_OK 0x01
28 static cmdinfo_t
*cmdtab
;
31 static int compare_cmdname(const void *a
, const void *b
)
33 return strcmp(((const cmdinfo_t
*)a
)->name
,
34 ((const cmdinfo_t
*)b
)->name
);
37 void qemuio_add_command(const cmdinfo_t
*ci
)
39 cmdtab
= g_renew(cmdinfo_t
, cmdtab
, ++ncmds
);
40 cmdtab
[ncmds
- 1] = *ci
;
41 qsort(cmdtab
, ncmds
, sizeof(*cmdtab
), compare_cmdname
);
44 int qemuio_command_usage(const cmdinfo_t
*ci
)
46 printf("%s %s -- %s\n", ci
->name
, ci
->args
, ci
->oneline
);
50 static int init_check_command(BlockBackend
*blk
, const cmdinfo_t
*ct
)
52 if (ct
->flags
& CMD_FLAG_GLOBAL
) {
55 if (!(ct
->flags
& CMD_NOFILE_OK
) && !blk
) {
56 fprintf(stderr
, "no file open, try 'help open'\n");
62 static int command(BlockBackend
*blk
, const cmdinfo_t
*ct
, int argc
,
67 if (!init_check_command(blk
, ct
)) {
71 if (argc
- 1 < ct
->argmin
|| (ct
->argmax
!= -1 && argc
- 1 > ct
->argmax
)) {
72 if (ct
->argmax
== -1) {
74 "bad argument count %d to %s, expected at least %d arguments\n",
75 argc
-1, cmd
, ct
->argmin
);
76 } else if (ct
->argmin
== ct
->argmax
) {
78 "bad argument count %d to %s, expected %d arguments\n",
79 argc
-1, cmd
, ct
->argmin
);
82 "bad argument count %d to %s, expected between %d and %d arguments\n",
83 argc
-1, cmd
, ct
->argmin
, ct
->argmax
);
88 return ct
->cfunc(blk
, argc
, argv
);
91 static const cmdinfo_t
*find_command(const char *cmd
)
95 for (ct
= cmdtab
; ct
< &cmdtab
[ncmds
]; ct
++) {
96 if (strcmp(ct
->name
, cmd
) == 0 ||
97 (ct
->altname
&& strcmp(ct
->altname
, cmd
) == 0))
99 return (const cmdinfo_t
*)ct
;
105 /* Invoke fn() for commands with a matching prefix */
106 void qemuio_complete_command(const char *input
,
107 void (*fn
)(const char *cmd
, void *opaque
),
111 size_t input_len
= strlen(input
);
113 for (ct
= cmdtab
; ct
< &cmdtab
[ncmds
]; ct
++) {
114 if (strncmp(input
, ct
->name
, input_len
) == 0) {
115 fn(ct
->name
, opaque
);
120 static char **breakline(char *input
, int *count
)
124 char **rval
= g_new0(char *, 1);
126 while (rval
&& (p
= qemu_strsep(&input
, " ")) != NULL
) {
131 rval
= g_renew(char *, rval
, (c
+ 1));
139 static int64_t cvtnum(const char *s
)
144 ret
= qemu_strtosz_suffix(s
, &end
, QEMU_STRTOSZ_DEFSUFFIX_B
);
146 /* Detritus at the end of the string */
152 static void print_cvtnum_err(int64_t rc
, const char *arg
)
156 printf("Parsing error: non-numeric argument,"
157 " or extraneous/unrecognized suffix -- %s\n", arg
);
160 printf("Parsing error: argument too large -- %s\n", arg
);
163 printf("Parsing error: %s\n", arg
);
167 #define EXABYTES(x) ((long long)(x) << 60)
168 #define PETABYTES(x) ((long long)(x) << 50)
169 #define TERABYTES(x) ((long long)(x) << 40)
170 #define GIGABYTES(x) ((long long)(x) << 30)
171 #define MEGABYTES(x) ((long long)(x) << 20)
172 #define KILOBYTES(x) ((long long)(x) << 10)
174 #define TO_EXABYTES(x) ((x) / EXABYTES(1))
175 #define TO_PETABYTES(x) ((x) / PETABYTES(1))
176 #define TO_TERABYTES(x) ((x) / TERABYTES(1))
177 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
178 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
179 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
181 static void cvtstr(double value
, char *str
, size_t size
)
186 if (value
>= EXABYTES(1)) {
188 snprintf(str
, size
- 4, "%.3f", TO_EXABYTES(value
));
189 } else if (value
>= PETABYTES(1)) {
191 snprintf(str
, size
- 4, "%.3f", TO_PETABYTES(value
));
192 } else if (value
>= TERABYTES(1)) {
194 snprintf(str
, size
- 4, "%.3f", TO_TERABYTES(value
));
195 } else if (value
>= GIGABYTES(1)) {
197 snprintf(str
, size
- 4, "%.3f", TO_GIGABYTES(value
));
198 } else if (value
>= MEGABYTES(1)) {
200 snprintf(str
, size
- 4, "%.3f", TO_MEGABYTES(value
));
201 } else if (value
>= KILOBYTES(1)) {
203 snprintf(str
, size
- 4, "%.3f", TO_KILOBYTES(value
));
206 snprintf(str
, size
- 6, "%f", value
);
209 trim
= strstr(str
, ".000");
211 strcpy(trim
, suffix
);
219 static struct timeval
tsub(struct timeval t1
, struct timeval t2
)
221 t1
.tv_usec
-= t2
.tv_usec
;
222 if (t1
.tv_usec
< 0) {
223 t1
.tv_usec
+= 1000000;
226 t1
.tv_sec
-= t2
.tv_sec
;
230 static double tdiv(double value
, struct timeval tv
)
232 return value
/ ((double)tv
.tv_sec
+ ((double)tv
.tv_usec
/ 1000000.0));
235 #define HOURS(sec) ((sec) / (60 * 60))
236 #define MINUTES(sec) (((sec) % (60 * 60)) / 60)
237 #define SECONDS(sec) ((sec) % 60)
241 TERSE_FIXED_TIME
= 0x1,
242 VERBOSE_FIXED_TIME
= 0x2,
245 static void timestr(struct timeval
*tv
, char *ts
, size_t size
, int format
)
247 double usec
= (double)tv
->tv_usec
/ 1000000.0;
249 if (format
& TERSE_FIXED_TIME
) {
250 if (!HOURS(tv
->tv_sec
)) {
251 snprintf(ts
, size
, "%u:%02u.%02u",
252 (unsigned int) MINUTES(tv
->tv_sec
),
253 (unsigned int) SECONDS(tv
->tv_sec
),
254 (unsigned int) (usec
* 100));
257 format
|= VERBOSE_FIXED_TIME
; /* fallback if hours needed */
260 if ((format
& VERBOSE_FIXED_TIME
) || tv
->tv_sec
) {
261 snprintf(ts
, size
, "%u:%02u:%02u.%02u",
262 (unsigned int) HOURS(tv
->tv_sec
),
263 (unsigned int) MINUTES(tv
->tv_sec
),
264 (unsigned int) SECONDS(tv
->tv_sec
),
265 (unsigned int) (usec
* 100));
267 snprintf(ts
, size
, "0.%04u sec", (unsigned int) (usec
* 10000));
272 * Parse the pattern argument to various sub-commands.
274 * Because the pattern is used as an argument to memset it must evaluate
275 * to an unsigned integer that fits into a single byte.
277 static int parse_pattern(const char *arg
)
282 pattern
= strtol(arg
, &endptr
, 0);
283 if (pattern
< 0 || pattern
> UCHAR_MAX
|| *endptr
!= '\0') {
284 printf("%s is not a valid pattern byte\n", arg
);
292 * Memory allocation helpers.
294 * Make sure memory is aligned by default, or purposefully misaligned if
295 * that is specified on the command line.
298 #define MISALIGN_OFFSET 16
299 static void *qemu_io_alloc(BlockBackend
*blk
, size_t len
, int pattern
)
303 if (qemuio_misalign
) {
304 len
+= MISALIGN_OFFSET
;
306 buf
= blk_blockalign(blk
, len
);
307 memset(buf
, pattern
, len
);
308 if (qemuio_misalign
) {
309 buf
+= MISALIGN_OFFSET
;
314 static void qemu_io_free(void *p
)
316 if (qemuio_misalign
) {
317 p
-= MISALIGN_OFFSET
;
322 static void dump_buffer(const void *buffer
, int64_t offset
, int64_t len
)
328 for (i
= 0, p
= buffer
; i
< len
; i
+= 16) {
329 const uint8_t *s
= p
;
331 printf("%08" PRIx64
": ", offset
+ i
);
332 for (j
= 0; j
< 16 && i
+ j
< len
; j
++, p
++) {
336 for (j
= 0; j
< 16 && i
+ j
< len
; j
++, s
++) {
347 static void print_report(const char *op
, struct timeval
*t
, int64_t offset
,
348 int64_t count
, int64_t total
, int cnt
, bool Cflag
)
350 char s1
[64], s2
[64], ts
[64];
352 timestr(t
, ts
, sizeof(ts
), Cflag
? VERBOSE_FIXED_TIME
: 0);
354 cvtstr((double)total
, s1
, sizeof(s1
));
355 cvtstr(tdiv((double)total
, *t
), s2
, sizeof(s2
));
356 printf("%s %"PRId64
"/%"PRId64
" bytes at offset %" PRId64
"\n",
357 op
, total
, count
, offset
);
358 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
359 s1
, cnt
, ts
, s2
, tdiv((double)cnt
, *t
));
360 } else {/* bytes,ops,time,bytes/sec,ops/sec */
361 printf("%"PRId64
",%d,%s,%.3f,%.3f\n",
363 tdiv((double)total
, *t
),
364 tdiv((double)cnt
, *t
));
369 * Parse multiple length statements for vectored I/O, and construct an I/O
370 * vector matching it.
373 create_iovec(BlockBackend
*blk
, QEMUIOVector
*qiov
, char **argv
, int nr_iov
,
376 size_t *sizes
= g_new0(size_t, nr_iov
);
382 for (i
= 0; i
< nr_iov
; i
++) {
388 print_cvtnum_err(len
, arg
);
392 /* should be SIZE_T_MAX, but that doesn't exist */
394 printf("Argument '%s' exceeds maximum size %d\n", arg
, INT_MAX
);
402 qemu_iovec_init(qiov
, nr_iov
);
404 buf
= p
= qemu_io_alloc(blk
, count
, pattern
);
406 for (i
= 0; i
< nr_iov
; i
++) {
407 qemu_iovec_add(qiov
, p
, sizes
[i
]);
416 static int do_pread(BlockBackend
*blk
, char *buf
, int64_t offset
,
417 int64_t count
, int64_t *total
)
419 if (count
> INT_MAX
) {
423 *total
= blk_pread(blk
, offset
, (uint8_t *)buf
, count
);
430 static int do_pwrite(BlockBackend
*blk
, char *buf
, int64_t offset
,
431 int64_t count
, int flags
, int64_t *total
)
433 if (count
> INT_MAX
) {
437 *total
= blk_pwrite(blk
, offset
, (uint8_t *)buf
, count
, flags
);
454 static void coroutine_fn
co_write_zeroes_entry(void *opaque
)
456 CoWriteZeroes
*data
= opaque
;
458 data
->ret
= blk_co_write_zeroes(data
->blk
, data
->offset
, data
->count
,
462 *data
->total
= data
->ret
;
466 *data
->total
= data
->count
;
469 static int do_co_write_zeroes(BlockBackend
*blk
, int64_t offset
, int64_t count
,
470 int flags
, int64_t *total
)
473 CoWriteZeroes data
= {
482 if (count
>> BDRV_SECTOR_BITS
> INT_MAX
) {
486 co
= qemu_coroutine_create(co_write_zeroes_entry
);
487 qemu_coroutine_enter(co
, &data
);
489 aio_poll(blk_get_aio_context(blk
), true);
498 static int do_write_compressed(BlockBackend
*blk
, char *buf
, int64_t offset
,
499 int64_t count
, int64_t *total
)
503 if (count
>> 9 > INT_MAX
) {
507 ret
= blk_write_compressed(blk
, offset
>> 9, (uint8_t *)buf
, count
>> 9);
515 static int do_load_vmstate(BlockBackend
*blk
, char *buf
, int64_t offset
,
516 int64_t count
, int64_t *total
)
518 if (count
> INT_MAX
) {
522 *total
= blk_load_vmstate(blk
, (uint8_t *)buf
, offset
, count
);
529 static int do_save_vmstate(BlockBackend
*blk
, char *buf
, int64_t offset
,
530 int64_t count
, int64_t *total
)
532 if (count
> INT_MAX
) {
536 *total
= blk_save_vmstate(blk
, (uint8_t *)buf
, offset
, count
);
543 #define NOT_DONE 0x7fffffff
544 static void aio_rw_done(void *opaque
, int ret
)
546 *(int *)opaque
= ret
;
549 static int do_aio_readv(BlockBackend
*blk
, QEMUIOVector
*qiov
,
550 int64_t offset
, int *total
)
552 int async_ret
= NOT_DONE
;
554 blk_aio_preadv(blk
, offset
, qiov
, 0, aio_rw_done
, &async_ret
);
555 while (async_ret
== NOT_DONE
) {
556 main_loop_wait(false);
560 return async_ret
< 0 ? async_ret
: 1;
563 static int do_aio_writev(BlockBackend
*blk
, QEMUIOVector
*qiov
,
564 int64_t offset
, int flags
, int *total
)
566 int async_ret
= NOT_DONE
;
568 blk_aio_pwritev(blk
, offset
, qiov
, flags
, aio_rw_done
, &async_ret
);
569 while (async_ret
== NOT_DONE
) {
570 main_loop_wait(false);
574 return async_ret
< 0 ? async_ret
: 1;
577 struct multiwrite_async_ret
{
582 static void multiwrite_cb(void *opaque
, int ret
)
584 struct multiwrite_async_ret
*async_ret
= opaque
;
586 async_ret
->num_done
++;
588 async_ret
->error
= ret
;
592 static int do_aio_multiwrite(BlockBackend
*blk
, BlockRequest
* reqs
,
593 int num_reqs
, int *total
)
596 struct multiwrite_async_ret async_ret
= {
602 for (i
= 0; i
< num_reqs
; i
++) {
603 reqs
[i
].cb
= multiwrite_cb
;
604 reqs
[i
].opaque
= &async_ret
;
605 *total
+= reqs
[i
].qiov
->size
;
608 ret
= blk_aio_multiwrite(blk
, reqs
, num_reqs
);
613 while (async_ret
.num_done
< num_reqs
) {
614 main_loop_wait(false);
617 return async_ret
.error
< 0 ? async_ret
.error
: 1;
620 static void read_help(void)
624 " reads a range of bytes from the given offset\n"
627 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
629 " Reads a segment of the currently open file, optionally dumping it to the\n"
630 " standard output stream (with -v option) for subsequent inspection.\n"
631 " -b, -- read from the VM state rather than the virtual disk\n"
632 " -C, -- report statistics in a machine parsable format\n"
633 " -l, -- length for pattern verification (only with -P)\n"
634 " -p, -- ignored for backwards compatibility\n"
635 " -P, -- use a pattern to verify read data\n"
636 " -q, -- quiet mode, do not show I/O statistics\n"
637 " -s, -- start offset for pattern verification (only with -P)\n"
638 " -v, -- dump buffer to standard output\n"
642 static int read_f(BlockBackend
*blk
, int argc
, char **argv
);
644 static const cmdinfo_t read_cmd
= {
650 .args
= "[-abCqv] [-P pattern [-s off] [-l len]] off len",
651 .oneline
= "reads a number of bytes at a specified offset",
655 static int read_f(BlockBackend
*blk
, int argc
, char **argv
)
657 struct timeval t1
, t2
;
658 bool Cflag
= false, qflag
= false, vflag
= false;
659 bool Pflag
= false, sflag
= false, lflag
= false, bflag
= false;
664 /* Some compilers get confused and warn if this is not initialized. */
667 int64_t pattern_offset
= 0, pattern_count
= 0;
669 while ((c
= getopt(argc
, argv
, "bCl:pP:qs:v")) != -1) {
679 pattern_count
= cvtnum(optarg
);
680 if (pattern_count
< 0) {
681 print_cvtnum_err(pattern_count
, optarg
);
686 /* Ignored for backwards compatibility */
690 pattern
= parse_pattern(optarg
);
700 pattern_offset
= cvtnum(optarg
);
701 if (pattern_offset
< 0) {
702 print_cvtnum_err(pattern_offset
, optarg
);
710 return qemuio_command_usage(&read_cmd
);
714 if (optind
!= argc
- 2) {
715 return qemuio_command_usage(&read_cmd
);
718 offset
= cvtnum(argv
[optind
]);
720 print_cvtnum_err(offset
, argv
[optind
]);
725 count
= cvtnum(argv
[optind
]);
727 print_cvtnum_err(count
, argv
[optind
]);
729 } else if (count
> SIZE_MAX
) {
730 printf("length cannot exceed %" PRIu64
", given %s\n",
731 (uint64_t) SIZE_MAX
, argv
[optind
]);
735 if (!Pflag
&& (lflag
|| sflag
)) {
736 return qemuio_command_usage(&read_cmd
);
740 pattern_count
= count
- pattern_offset
;
743 if ((pattern_count
< 0) || (pattern_count
+ pattern_offset
> count
)) {
744 printf("pattern verification range exceeds end of read data\n");
749 if (offset
& 0x1ff) {
750 printf("offset %" PRId64
" is not sector aligned\n",
755 printf("count %"PRId64
" is not sector aligned\n",
761 buf
= qemu_io_alloc(blk
, count
, 0xab);
763 gettimeofday(&t1
, NULL
);
765 cnt
= do_load_vmstate(blk
, buf
, offset
, count
, &total
);
767 cnt
= do_pread(blk
, buf
, offset
, count
, &total
);
769 gettimeofday(&t2
, NULL
);
772 printf("read failed: %s\n", strerror(-cnt
));
777 void *cmp_buf
= g_malloc(pattern_count
);
778 memset(cmp_buf
, pattern
, pattern_count
);
779 if (memcmp(buf
+ pattern_offset
, cmp_buf
, pattern_count
)) {
780 printf("Pattern verification failed at offset %"
781 PRId64
", %"PRId64
" bytes\n",
782 offset
+ pattern_offset
, pattern_count
);
792 dump_buffer(buf
, offset
, count
);
795 /* Finally, report back -- -C gives a parsable format */
797 print_report("read", &t2
, offset
, count
, total
, cnt
, Cflag
);
805 static void readv_help(void)
809 " reads a range of bytes from the given offset into multiple buffers\n"
812 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
814 " Reads a segment of the currently open file, optionally dumping it to the\n"
815 " standard output stream (with -v option) for subsequent inspection.\n"
816 " Uses multiple iovec buffers if more than one byte range is specified.\n"
817 " -C, -- report statistics in a machine parsable format\n"
818 " -P, -- use a pattern to verify read data\n"
819 " -v, -- dump buffer to standard output\n"
820 " -q, -- quiet mode, do not show I/O statistics\n"
824 static int readv_f(BlockBackend
*blk
, int argc
, char **argv
);
826 static const cmdinfo_t readv_cmd
= {
831 .args
= "[-Cqv] [-P pattern] off len [len..]",
832 .oneline
= "reads a number of bytes at a specified offset",
836 static int readv_f(BlockBackend
*blk
, int argc
, char **argv
)
838 struct timeval t1
, t2
;
839 bool Cflag
= false, qflag
= false, vflag
= false;
843 /* Some compilers get confused and warn if this is not initialized. */
850 while ((c
= getopt(argc
, argv
, "CP:qv")) != -1) {
857 pattern
= parse_pattern(optarg
);
869 return qemuio_command_usage(&readv_cmd
);
873 if (optind
> argc
- 2) {
874 return qemuio_command_usage(&readv_cmd
);
878 offset
= cvtnum(argv
[optind
]);
880 print_cvtnum_err(offset
, argv
[optind
]);
885 nr_iov
= argc
- optind
;
886 buf
= create_iovec(blk
, &qiov
, &argv
[optind
], nr_iov
, 0xab);
891 gettimeofday(&t1
, NULL
);
892 cnt
= do_aio_readv(blk
, &qiov
, offset
, &total
);
893 gettimeofday(&t2
, NULL
);
896 printf("readv failed: %s\n", strerror(-cnt
));
901 void *cmp_buf
= g_malloc(qiov
.size
);
902 memset(cmp_buf
, pattern
, qiov
.size
);
903 if (memcmp(buf
, cmp_buf
, qiov
.size
)) {
904 printf("Pattern verification failed at offset %"
905 PRId64
", %zd bytes\n", offset
, qiov
.size
);
915 dump_buffer(buf
, offset
, qiov
.size
);
918 /* Finally, report back -- -C gives a parsable format */
920 print_report("read", &t2
, offset
, qiov
.size
, total
, cnt
, Cflag
);
923 qemu_iovec_destroy(&qiov
);
928 static void write_help(void)
932 " writes a range of bytes from the given offset\n"
935 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
937 " Writes into a segment of the currently open file, using a buffer\n"
938 " filled with a set pattern (0xcdcdcdcd).\n"
939 " -b, -- write to the VM state rather than the virtual disk\n"
940 " -c, -- write compressed data with blk_write_compressed\n"
941 " -f, -- use Force Unit Access semantics\n"
942 " -p, -- ignored for backwards compatibility\n"
943 " -P, -- use different pattern to fill file\n"
944 " -C, -- report statistics in a machine parsable format\n"
945 " -q, -- quiet mode, do not show I/O statistics\n"
946 " -z, -- write zeroes using blk_co_write_zeroes\n"
950 static int write_f(BlockBackend
*blk
, int argc
, char **argv
);
952 static const cmdinfo_t write_cmd
= {
958 .args
= "[-bcCfqz] [-P pattern] off len",
959 .oneline
= "writes a number of bytes at a specified offset",
963 static int write_f(BlockBackend
*blk
, int argc
, char **argv
)
965 struct timeval t1
, t2
;
966 bool Cflag
= false, qflag
= false, bflag
= false;
967 bool Pflag
= false, zflag
= false, cflag
= false;
973 /* Some compilers get confused and warn if this is not initialized. */
977 while ((c
= getopt(argc
, argv
, "bcCfpP:qz")) != -1) {
989 flags
|= BDRV_REQ_FUA
;
992 /* Ignored for backwards compatibility */
996 pattern
= parse_pattern(optarg
);
1008 return qemuio_command_usage(&write_cmd
);
1012 if (optind
!= argc
- 2) {
1013 return qemuio_command_usage(&write_cmd
);
1016 if (bflag
&& zflag
) {
1017 printf("-b and -z cannot be specified at the same time\n");
1021 if ((flags
& BDRV_REQ_FUA
) && (bflag
|| cflag
)) {
1022 printf("-f and -b or -c cannot be specified at the same time\n");
1026 if (zflag
&& Pflag
) {
1027 printf("-z and -P cannot be specified at the same time\n");
1031 offset
= cvtnum(argv
[optind
]);
1033 print_cvtnum_err(offset
, argv
[optind
]);
1038 count
= cvtnum(argv
[optind
]);
1040 print_cvtnum_err(count
, argv
[optind
]);
1042 } else if (count
> SIZE_MAX
) {
1043 printf("length cannot exceed %" PRIu64
", given %s\n",
1044 (uint64_t) SIZE_MAX
, argv
[optind
]);
1048 if (bflag
|| cflag
) {
1049 if (offset
& 0x1ff) {
1050 printf("offset %" PRId64
" is not sector aligned\n",
1055 if (count
& 0x1ff) {
1056 printf("count %"PRId64
" is not sector aligned\n",
1063 buf
= qemu_io_alloc(blk
, count
, pattern
);
1066 gettimeofday(&t1
, NULL
);
1068 cnt
= do_save_vmstate(blk
, buf
, offset
, count
, &total
);
1070 cnt
= do_co_write_zeroes(blk
, offset
, count
, flags
, &total
);
1072 cnt
= do_write_compressed(blk
, buf
, offset
, count
, &total
);
1074 cnt
= do_pwrite(blk
, buf
, offset
, count
, flags
, &total
);
1076 gettimeofday(&t2
, NULL
);
1079 printf("write failed: %s\n", strerror(-cnt
));
1087 /* Finally, report back -- -C gives a parsable format */
1089 print_report("wrote", &t2
, offset
, count
, total
, cnt
, Cflag
);
1104 " writes a range of bytes from the given offset source from multiple buffers\n"
1107 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1109 " Writes into a segment of the currently open file, using a buffer\n"
1110 " filled with a set pattern (0xcdcdcdcd).\n"
1111 " -P, -- use different pattern to fill file\n"
1112 " -C, -- report statistics in a machine parsable format\n"
1113 " -f, -- use Force Unit Access semantics\n"
1114 " -q, -- quiet mode, do not show I/O statistics\n"
1118 static int writev_f(BlockBackend
*blk
, int argc
, char **argv
);
1120 static const cmdinfo_t writev_cmd
= {
1125 .args
= "[-Cfq] [-P pattern] off len [len..]",
1126 .oneline
= "writes a number of bytes at a specified offset",
1127 .help
= writev_help
,
1130 static int writev_f(BlockBackend
*blk
, int argc
, char **argv
)
1132 struct timeval t1
, t2
;
1133 bool Cflag
= false, qflag
= false;
1138 /* Some compilers get confused and warn if this is not initialized. */
1144 while ((c
= getopt(argc
, argv
, "CqP:")) != -1) {
1150 flags
|= BDRV_REQ_FUA
;
1156 pattern
= parse_pattern(optarg
);
1162 return qemuio_command_usage(&writev_cmd
);
1166 if (optind
> argc
- 2) {
1167 return qemuio_command_usage(&writev_cmd
);
1170 offset
= cvtnum(argv
[optind
]);
1172 print_cvtnum_err(offset
, argv
[optind
]);
1177 nr_iov
= argc
- optind
;
1178 buf
= create_iovec(blk
, &qiov
, &argv
[optind
], nr_iov
, pattern
);
1183 gettimeofday(&t1
, NULL
);
1184 cnt
= do_aio_writev(blk
, &qiov
, offset
, flags
, &total
);
1185 gettimeofday(&t2
, NULL
);
1188 printf("writev failed: %s\n", strerror(-cnt
));
1196 /* Finally, report back -- -C gives a parsable format */
1198 print_report("wrote", &t2
, offset
, qiov
.size
, total
, cnt
, Cflag
);
1200 qemu_iovec_destroy(&qiov
);
1205 static void multiwrite_help(void)
1209 " writes a range of bytes from the given offset source from multiple buffers,\n"
1210 " in a batch of requests that may be merged by qemu\n"
1213 " 'multiwrite 512 1k 1k ; 4k 1k'\n"
1214 " writes 2 kB at 512 bytes and 1 kB at 4 kB into the open file\n"
1216 " Writes into a segment of the currently open file, using a buffer\n"
1217 " filled with a set pattern (0xcdcdcdcd). The pattern byte is increased\n"
1218 " by one for each request contained in the multiwrite command.\n"
1219 " -P, -- use different pattern to fill file\n"
1220 " -C, -- report statistics in a machine parsable format\n"
1221 " -q, -- quiet mode, do not show I/O statistics\n"
1225 static int multiwrite_f(BlockBackend
*blk
, int argc
, char **argv
);
1227 static const cmdinfo_t multiwrite_cmd
= {
1228 .name
= "multiwrite",
1229 .cfunc
= multiwrite_f
,
1232 .args
= "[-Cq] [-P pattern ] off len [len..] [; off len [len..]..]",
1233 .oneline
= "issues multiple write requests at once",
1234 .help
= multiwrite_help
,
1237 static int multiwrite_f(BlockBackend
*blk
, int argc
, char **argv
)
1239 struct timeval t1
, t2
;
1240 bool Cflag
= false, qflag
= false;
1243 int64_t offset
, first_offset
= 0;
1244 /* Some compilers get confused and warn if this is not initialized. */
1249 QEMUIOVector
*qiovs
;
1253 while ((c
= getopt(argc
, argv
, "CqP:")) != -1) {
1262 pattern
= parse_pattern(optarg
);
1268 return qemuio_command_usage(&writev_cmd
);
1272 if (optind
> argc
- 2) {
1273 return qemuio_command_usage(&writev_cmd
);
1277 for (i
= optind
; i
< argc
; i
++) {
1278 if (!strcmp(argv
[i
], ";")) {
1283 reqs
= g_new0(BlockRequest
, nr_reqs
);
1284 buf
= g_new0(char *, nr_reqs
);
1285 qiovs
= g_new(QEMUIOVector
, nr_reqs
);
1287 for (i
= 0; i
< nr_reqs
&& optind
< argc
; i
++) {
1290 /* Read the offset of the request */
1291 offset
= cvtnum(argv
[optind
]);
1293 print_cvtnum_err(offset
, argv
[optind
]);
1298 if (offset
& 0x1ff) {
1299 printf("offset %lld is not sector aligned\n",
1305 first_offset
= offset
;
1308 /* Read lengths for qiov entries */
1309 for (j
= optind
; j
< argc
; j
++) {
1310 if (!strcmp(argv
[j
], ";")) {
1315 nr_iov
= j
- optind
;
1318 buf
[i
] = create_iovec(blk
, &qiovs
[i
], &argv
[optind
], nr_iov
, pattern
);
1319 if (buf
[i
] == NULL
) {
1323 reqs
[i
].qiov
= &qiovs
[i
];
1324 reqs
[i
].sector
= offset
>> 9;
1325 reqs
[i
].nb_sectors
= reqs
[i
].qiov
->size
>> 9;
1332 /* If there were empty requests at the end, ignore them */
1335 gettimeofday(&t1
, NULL
);
1336 cnt
= do_aio_multiwrite(blk
, reqs
, nr_reqs
, &total
);
1337 gettimeofday(&t2
, NULL
);
1340 printf("aio_multiwrite failed: %s\n", strerror(-cnt
));
1348 /* Finally, report back -- -C gives a parsable format */
1350 print_report("wrote", &t2
, first_offset
, total
, total
, cnt
, Cflag
);
1352 for (i
= 0; i
< nr_reqs
; i
++) {
1353 qemu_io_free(buf
[i
]);
1354 if (reqs
[i
].qiov
!= NULL
) {
1355 qemu_iovec_destroy(&qiovs
[i
]);
1374 BlockAcctCookie acct
;
1379 static void aio_write_done(void *opaque
, int ret
)
1381 struct aio_ctx
*ctx
= opaque
;
1384 gettimeofday(&t2
, NULL
);
1388 printf("aio_write failed: %s\n", strerror(-ret
));
1389 block_acct_failed(blk_get_stats(ctx
->blk
), &ctx
->acct
);
1393 block_acct_done(blk_get_stats(ctx
->blk
), &ctx
->acct
);
1399 /* Finally, report back -- -C gives a parsable format */
1400 t2
= tsub(t2
, ctx
->t1
);
1401 print_report("wrote", &t2
, ctx
->offset
, ctx
->qiov
.size
,
1402 ctx
->qiov
.size
, 1, ctx
->Cflag
);
1405 qemu_io_free(ctx
->buf
);
1406 qemu_iovec_destroy(&ctx
->qiov
);
1411 static void aio_read_done(void *opaque
, int ret
)
1413 struct aio_ctx
*ctx
= opaque
;
1416 gettimeofday(&t2
, NULL
);
1419 printf("readv failed: %s\n", strerror(-ret
));
1420 block_acct_failed(blk_get_stats(ctx
->blk
), &ctx
->acct
);
1425 void *cmp_buf
= g_malloc(ctx
->qiov
.size
);
1427 memset(cmp_buf
, ctx
->pattern
, ctx
->qiov
.size
);
1428 if (memcmp(ctx
->buf
, cmp_buf
, ctx
->qiov
.size
)) {
1429 printf("Pattern verification failed at offset %"
1430 PRId64
", %zd bytes\n", ctx
->offset
, ctx
->qiov
.size
);
1435 block_acct_done(blk_get_stats(ctx
->blk
), &ctx
->acct
);
1442 dump_buffer(ctx
->buf
, ctx
->offset
, ctx
->qiov
.size
);
1445 /* Finally, report back -- -C gives a parsable format */
1446 t2
= tsub(t2
, ctx
->t1
);
1447 print_report("read", &t2
, ctx
->offset
, ctx
->qiov
.size
,
1448 ctx
->qiov
.size
, 1, ctx
->Cflag
);
1450 qemu_io_free(ctx
->buf
);
1451 qemu_iovec_destroy(&ctx
->qiov
);
1455 static void aio_read_help(void)
1459 " asynchronously reads a range of bytes from the given offset\n"
1462 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1464 " Reads a segment of the currently open file, optionally dumping it to the\n"
1465 " standard output stream (with -v option) for subsequent inspection.\n"
1466 " The read is performed asynchronously and the aio_flush command must be\n"
1467 " used to ensure all outstanding aio requests have been completed.\n"
1468 " -C, -- report statistics in a machine parsable format\n"
1469 " -P, -- use a pattern to verify read data\n"
1470 " -v, -- dump buffer to standard output\n"
1471 " -q, -- quiet mode, do not show I/O statistics\n"
1475 static int aio_read_f(BlockBackend
*blk
, int argc
, char **argv
);
1477 static const cmdinfo_t aio_read_cmd
= {
1479 .cfunc
= aio_read_f
,
1482 .args
= "[-Cqv] [-P pattern] off len [len..]",
1483 .oneline
= "asynchronously reads a number of bytes",
1484 .help
= aio_read_help
,
1487 static int aio_read_f(BlockBackend
*blk
, int argc
, char **argv
)
1490 struct aio_ctx
*ctx
= g_new0(struct aio_ctx
, 1);
1493 while ((c
= getopt(argc
, argv
, "CP:qv")) != -1) {
1500 ctx
->pattern
= parse_pattern(optarg
);
1501 if (ctx
->pattern
< 0) {
1514 return qemuio_command_usage(&aio_read_cmd
);
1518 if (optind
> argc
- 2) {
1520 return qemuio_command_usage(&aio_read_cmd
);
1523 ctx
->offset
= cvtnum(argv
[optind
]);
1524 if (ctx
->offset
< 0) {
1525 print_cvtnum_err(ctx
->offset
, argv
[optind
]);
1531 nr_iov
= argc
- optind
;
1532 ctx
->buf
= create_iovec(blk
, &ctx
->qiov
, &argv
[optind
], nr_iov
, 0xab);
1533 if (ctx
->buf
== NULL
) {
1534 block_acct_invalid(blk_get_stats(blk
), BLOCK_ACCT_READ
);
1539 gettimeofday(&ctx
->t1
, NULL
);
1540 block_acct_start(blk_get_stats(blk
), &ctx
->acct
, ctx
->qiov
.size
,
1542 blk_aio_preadv(blk
, ctx
->offset
, &ctx
->qiov
, 0, aio_read_done
, ctx
);
1546 static void aio_write_help(void)
1550 " asynchronously writes a range of bytes from the given offset source\n"
1551 " from multiple buffers\n"
1554 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1556 " Writes into a segment of the currently open file, using a buffer\n"
1557 " filled with a set pattern (0xcdcdcdcd).\n"
1558 " The write is performed asynchronously and the aio_flush command must be\n"
1559 " used to ensure all outstanding aio requests have been completed.\n"
1560 " -P, -- use different pattern to fill file\n"
1561 " -C, -- report statistics in a machine parsable format\n"
1562 " -f, -- use Force Unit Access semantics\n"
1563 " -q, -- quiet mode, do not show I/O statistics\n"
1564 " -z, -- write zeroes using blk_aio_write_zeroes\n"
1568 static int aio_write_f(BlockBackend
*blk
, int argc
, char **argv
);
1570 static const cmdinfo_t aio_write_cmd
= {
1571 .name
= "aio_write",
1572 .cfunc
= aio_write_f
,
1575 .args
= "[-Cfqz] [-P pattern] off len [len..]",
1576 .oneline
= "asynchronously writes a number of bytes",
1577 .help
= aio_write_help
,
1580 static int aio_write_f(BlockBackend
*blk
, int argc
, char **argv
)
1584 struct aio_ctx
*ctx
= g_new0(struct aio_ctx
, 1);
1588 while ((c
= getopt(argc
, argv
, "CfqP:z")) != -1) {
1594 flags
|= BDRV_REQ_FUA
;
1600 pattern
= parse_pattern(optarg
);
1611 return qemuio_command_usage(&aio_write_cmd
);
1615 if (optind
> argc
- 2) {
1617 return qemuio_command_usage(&aio_write_cmd
);
1620 if (ctx
->zflag
&& optind
!= argc
- 2) {
1621 printf("-z supports only a single length parameter\n");
1626 if (ctx
->zflag
&& ctx
->Pflag
) {
1627 printf("-z and -P cannot be specified at the same time\n");
1632 ctx
->offset
= cvtnum(argv
[optind
]);
1633 if (ctx
->offset
< 0) {
1634 print_cvtnum_err(ctx
->offset
, argv
[optind
]);
1641 int64_t count
= cvtnum(argv
[optind
]);
1643 print_cvtnum_err(count
, argv
[optind
]);
1648 ctx
->qiov
.size
= count
;
1649 blk_aio_write_zeroes(blk
, ctx
->offset
, count
, flags
, aio_write_done
,
1652 nr_iov
= argc
- optind
;
1653 ctx
->buf
= create_iovec(blk
, &ctx
->qiov
, &argv
[optind
], nr_iov
,
1655 if (ctx
->buf
== NULL
) {
1656 block_acct_invalid(blk_get_stats(blk
), BLOCK_ACCT_WRITE
);
1661 gettimeofday(&ctx
->t1
, NULL
);
1662 block_acct_start(blk_get_stats(blk
), &ctx
->acct
, ctx
->qiov
.size
,
1665 blk_aio_pwritev(blk
, ctx
->offset
, &ctx
->qiov
, flags
, aio_write_done
,
1671 static int aio_flush_f(BlockBackend
*blk
, int argc
, char **argv
)
1673 BlockAcctCookie cookie
;
1674 block_acct_start(blk_get_stats(blk
), &cookie
, 0, BLOCK_ACCT_FLUSH
);
1676 block_acct_done(blk_get_stats(blk
), &cookie
);
1680 static const cmdinfo_t aio_flush_cmd
= {
1681 .name
= "aio_flush",
1682 .cfunc
= aio_flush_f
,
1683 .oneline
= "completes all outstanding aio requests"
1686 static int flush_f(BlockBackend
*blk
, int argc
, char **argv
)
1692 static const cmdinfo_t flush_cmd
= {
1696 .oneline
= "flush all in-core file state to disk",
1699 static int truncate_f(BlockBackend
*blk
, int argc
, char **argv
)
1704 offset
= cvtnum(argv
[1]);
1706 print_cvtnum_err(offset
, argv
[1]);
1710 ret
= blk_truncate(blk
, offset
);
1712 printf("truncate: %s\n", strerror(-ret
));
1719 static const cmdinfo_t truncate_cmd
= {
1722 .cfunc
= truncate_f
,
1726 .oneline
= "truncates the current file at the given offset",
1729 static int length_f(BlockBackend
*blk
, int argc
, char **argv
)
1734 size
= blk_getlength(blk
);
1736 printf("getlength: %s\n", strerror(-size
));
1740 cvtstr(size
, s1
, sizeof(s1
));
1746 static const cmdinfo_t length_cmd
= {
1750 .oneline
= "gets the length of the current file",
1754 static int info_f(BlockBackend
*blk
, int argc
, char **argv
)
1756 BlockDriverState
*bs
= blk_bs(blk
);
1757 BlockDriverInfo bdi
;
1758 ImageInfoSpecific
*spec_info
;
1759 char s1
[64], s2
[64];
1762 if (bs
->drv
&& bs
->drv
->format_name
) {
1763 printf("format name: %s\n", bs
->drv
->format_name
);
1765 if (bs
->drv
&& bs
->drv
->protocol_name
) {
1766 printf("format name: %s\n", bs
->drv
->protocol_name
);
1769 ret
= bdrv_get_info(bs
, &bdi
);
1774 cvtstr(bdi
.cluster_size
, s1
, sizeof(s1
));
1775 cvtstr(bdi
.vm_state_offset
, s2
, sizeof(s2
));
1777 printf("cluster size: %s\n", s1
);
1778 printf("vm state offset: %s\n", s2
);
1780 spec_info
= bdrv_get_specific_info(bs
);
1782 printf("Format specific information:\n");
1783 bdrv_image_info_specific_dump(fprintf
, stdout
, spec_info
);
1784 qapi_free_ImageInfoSpecific(spec_info
);
1792 static const cmdinfo_t info_cmd
= {
1796 .oneline
= "prints information about the current file",
1799 static void discard_help(void)
1803 " discards a range of bytes from the given offset\n"
1806 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1808 " Discards a segment of the currently open file.\n"
1809 " -C, -- report statistics in a machine parsable format\n"
1810 " -q, -- quiet mode, do not show I/O statistics\n"
1814 static int discard_f(BlockBackend
*blk
, int argc
, char **argv
);
1816 static const cmdinfo_t discard_cmd
= {
1822 .args
= "[-Cq] off len",
1823 .oneline
= "discards a number of bytes at a specified offset",
1824 .help
= discard_help
,
1827 static int discard_f(BlockBackend
*blk
, int argc
, char **argv
)
1829 struct timeval t1
, t2
;
1830 bool Cflag
= false, qflag
= false;
1832 int64_t offset
, count
;
1834 while ((c
= getopt(argc
, argv
, "Cq")) != -1) {
1843 return qemuio_command_usage(&discard_cmd
);
1847 if (optind
!= argc
- 2) {
1848 return qemuio_command_usage(&discard_cmd
);
1851 offset
= cvtnum(argv
[optind
]);
1853 print_cvtnum_err(offset
, argv
[optind
]);
1858 count
= cvtnum(argv
[optind
]);
1860 print_cvtnum_err(count
, argv
[optind
]);
1862 } else if (count
>> BDRV_SECTOR_BITS
> INT_MAX
) {
1863 printf("length cannot exceed %"PRIu64
", given %s\n",
1864 (uint64_t)INT_MAX
<< BDRV_SECTOR_BITS
,
1869 gettimeofday(&t1
, NULL
);
1870 ret
= blk_discard(blk
, offset
>> BDRV_SECTOR_BITS
,
1871 count
>> BDRV_SECTOR_BITS
);
1872 gettimeofday(&t2
, NULL
);
1875 printf("discard failed: %s\n", strerror(-ret
));
1879 /* Finally, report back -- -C gives a parsable format */
1882 print_report("discard", &t2
, offset
, count
, count
, 1, Cflag
);
1889 static int alloc_f(BlockBackend
*blk
, int argc
, char **argv
)
1891 BlockDriverState
*bs
= blk_bs(blk
);
1892 int64_t offset
, sector_num
, nb_sectors
, remaining
;
1897 offset
= cvtnum(argv
[1]);
1899 print_cvtnum_err(offset
, argv
[1]);
1901 } else if (offset
& 0x1ff) {
1902 printf("offset %" PRId64
" is not sector aligned\n",
1908 nb_sectors
= cvtnum(argv
[2]);
1909 if (nb_sectors
< 0) {
1910 print_cvtnum_err(nb_sectors
, argv
[2]);
1912 } else if (nb_sectors
> INT_MAX
) {
1913 printf("length argument cannot exceed %d, given %s\n",
1921 remaining
= nb_sectors
;
1923 sector_num
= offset
>> 9;
1925 ret
= bdrv_is_allocated(bs
, sector_num
, remaining
, &num
);
1927 printf("is_allocated failed: %s\n", strerror(-ret
));
1936 nb_sectors
-= remaining
;
1941 cvtstr(offset
, s1
, sizeof(s1
));
1943 printf("%"PRId64
"/%"PRId64
" sectors allocated at offset %s\n",
1944 sum_alloc
, nb_sectors
, s1
);
1948 static const cmdinfo_t alloc_cmd
= {
1954 .args
= "off [sectors]",
1955 .oneline
= "checks if a sector is present in the file",
1959 static int map_is_allocated(BlockDriverState
*bs
, int64_t sector_num
,
1960 int64_t nb_sectors
, int64_t *pnum
)
1962 int num
, num_checked
;
1965 num_checked
= MIN(nb_sectors
, INT_MAX
);
1966 ret
= bdrv_is_allocated(bs
, sector_num
, num_checked
, &num
);
1974 while (nb_sectors
> 0 && ret
== firstret
) {
1978 num_checked
= MIN(nb_sectors
, INT_MAX
);
1979 ret
= bdrv_is_allocated(bs
, sector_num
, num_checked
, &num
);
1980 if (ret
== firstret
&& num
) {
1990 static int map_f(BlockBackend
*blk
, int argc
, char **argv
)
1993 int64_t nb_sectors
, total_sectors
;
2000 total_sectors
= blk_nb_sectors(blk
);
2001 if (total_sectors
< 0) {
2002 error_report("Failed to query image length: %s",
2003 strerror(-total_sectors
));
2007 nb_sectors
= total_sectors
;
2010 ret
= map_is_allocated(blk_bs(blk
), offset
, nb_sectors
, &num
);
2012 error_report("Failed to get allocation status: %s", strerror(-ret
));
2015 error_report("Unexpected end of image");
2019 retstr
= ret
? " allocated" : "not allocated";
2020 cvtstr(offset
<< 9ULL, s1
, sizeof(s1
));
2021 printf("[% 24" PRId64
"] % 8" PRId64
"/% 8" PRId64
" sectors %s "
2022 "at offset %s (%d)\n",
2023 offset
<< 9ULL, num
, nb_sectors
, retstr
, s1
, ret
);
2027 } while (offset
< total_sectors
);
2032 static const cmdinfo_t map_cmd
= {
2038 .oneline
= "prints the allocated areas of a file",
2041 static void reopen_help(void)
2045 " Changes the open options of an already opened image\n"
2048 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
2050 " -r, -- Reopen the image read-only\n"
2051 " -c, -- Change the cache mode to the given value\n"
2052 " -o, -- Changes block driver options (cf. 'open' command)\n"
2056 static int reopen_f(BlockBackend
*blk
, int argc
, char **argv
);
2058 static QemuOptsList reopen_opts
= {
2060 .merge_lists
= true,
2061 .head
= QTAILQ_HEAD_INITIALIZER(reopen_opts
.head
),
2063 /* no elements => accept any params */
2064 { /* end of list */ }
2068 static const cmdinfo_t reopen_cmd
= {
2073 .args
= "[-r] [-c cache] [-o options]",
2074 .oneline
= "reopens an image with new options",
2075 .help
= reopen_help
,
2078 static int reopen_f(BlockBackend
*blk
, int argc
, char **argv
)
2080 BlockDriverState
*bs
= blk_bs(blk
);
2084 int flags
= bs
->open_flags
;
2085 bool writethrough
= !blk_enable_write_cache(blk
);
2087 BlockReopenQueue
*brq
;
2088 Error
*local_err
= NULL
;
2090 while ((c
= getopt(argc
, argv
, "c:o:r")) != -1) {
2093 if (bdrv_parse_cache_mode(optarg
, &flags
, &writethrough
) < 0) {
2094 error_report("Invalid cache option: %s", optarg
);
2099 if (!qemu_opts_parse_noisily(&reopen_opts
, optarg
, 0)) {
2100 qemu_opts_reset(&reopen_opts
);
2105 flags
&= ~BDRV_O_RDWR
;
2108 qemu_opts_reset(&reopen_opts
);
2109 return qemuio_command_usage(&reopen_cmd
);
2113 if (optind
!= argc
) {
2114 qemu_opts_reset(&reopen_opts
);
2115 return qemuio_command_usage(&reopen_cmd
);
2118 if (writethrough
!= blk_enable_write_cache(blk
) &&
2119 blk_get_attached_dev(blk
))
2121 error_report("Cannot change cache.writeback: Device attached");
2122 qemu_opts_reset(&reopen_opts
);
2126 qopts
= qemu_opts_find(&reopen_opts
, NULL
);
2127 opts
= qopts
? qemu_opts_to_qdict(qopts
, NULL
) : NULL
;
2128 qemu_opts_reset(&reopen_opts
);
2130 brq
= bdrv_reopen_queue(NULL
, bs
, opts
, flags
);
2131 bdrv_reopen_multiple(brq
, &local_err
);
2133 error_report_err(local_err
);
2135 blk_set_enable_write_cache(blk
, !writethrough
);
2141 static int break_f(BlockBackend
*blk
, int argc
, char **argv
)
2145 ret
= bdrv_debug_breakpoint(blk_bs(blk
), argv
[1], argv
[2]);
2147 printf("Could not set breakpoint: %s\n", strerror(-ret
));
2153 static int remove_break_f(BlockBackend
*blk
, int argc
, char **argv
)
2157 ret
= bdrv_debug_remove_breakpoint(blk_bs(blk
), argv
[1]);
2159 printf("Could not remove breakpoint %s: %s\n", argv
[1], strerror(-ret
));
2165 static const cmdinfo_t break_cmd
= {
2170 .args
= "event tag",
2171 .oneline
= "sets a breakpoint on event and tags the stopped "
2175 static const cmdinfo_t remove_break_cmd
= {
2176 .name
= "remove_break",
2179 .cfunc
= remove_break_f
,
2181 .oneline
= "remove a breakpoint by tag",
2184 static int resume_f(BlockBackend
*blk
, int argc
, char **argv
)
2188 ret
= bdrv_debug_resume(blk_bs(blk
), argv
[1]);
2190 printf("Could not resume request: %s\n", strerror(-ret
));
2196 static const cmdinfo_t resume_cmd
= {
2202 .oneline
= "resumes the request tagged as tag",
2205 static int wait_break_f(BlockBackend
*blk
, int argc
, char **argv
)
2207 while (!bdrv_debug_is_suspended(blk_bs(blk
), argv
[1])) {
2208 aio_poll(blk_get_aio_context(blk
), true);
2214 static const cmdinfo_t wait_break_cmd
= {
2215 .name
= "wait_break",
2218 .cfunc
= wait_break_f
,
2220 .oneline
= "waits for the suspension of a request",
2223 static int abort_f(BlockBackend
*blk
, int argc
, char **argv
)
2228 static const cmdinfo_t abort_cmd
= {
2231 .flags
= CMD_NOFILE_OK
,
2232 .oneline
= "simulate a program crash using abort(3)",
2235 static void sigraise_help(void)
2239 " raises the given signal\n"
2242 " 'sigraise %i' - raises SIGTERM\n"
2244 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2245 " given to sigraise.\n"
2249 static int sigraise_f(BlockBackend
*blk
, int argc
, char **argv
);
2251 static const cmdinfo_t sigraise_cmd
= {
2253 .cfunc
= sigraise_f
,
2256 .flags
= CMD_NOFILE_OK
,
2258 .oneline
= "raises a signal",
2259 .help
= sigraise_help
,
2262 static int sigraise_f(BlockBackend
*blk
, int argc
, char **argv
)
2264 int64_t sig
= cvtnum(argv
[1]);
2266 print_cvtnum_err(sig
, argv
[1]);
2268 } else if (sig
> NSIG
) {
2269 printf("signal argument '%s' is too large to be a valid signal\n",
2274 /* Using raise() to kill this process does not necessarily flush all open
2275 * streams. At least stdout and stderr (although the latter should be
2276 * non-buffered anyway) should be flushed, though. */
2284 static void sleep_cb(void *opaque
)
2286 bool *expired
= opaque
;
2290 static int sleep_f(BlockBackend
*blk
, int argc
, char **argv
)
2294 struct QEMUTimer
*timer
;
2295 bool expired
= false;
2297 ms
= strtol(argv
[1], &endptr
, 0);
2298 if (ms
< 0 || *endptr
!= '\0') {
2299 printf("%s is not a valid number\n", argv
[1]);
2303 timer
= timer_new_ns(QEMU_CLOCK_HOST
, sleep_cb
, &expired
);
2304 timer_mod(timer
, qemu_clock_get_ns(QEMU_CLOCK_HOST
) + SCALE_MS
* ms
);
2307 main_loop_wait(false);
2315 static const cmdinfo_t sleep_cmd
= {
2320 .flags
= CMD_NOFILE_OK
,
2321 .oneline
= "waits for the given value in milliseconds",
2324 static void help_oneline(const char *cmd
, const cmdinfo_t
*ct
)
2329 printf("%s ", ct
->name
);
2331 printf("(or %s) ", ct
->altname
);
2336 printf("%s ", ct
->args
);
2338 printf("-- %s\n", ct
->oneline
);
2341 static void help_onecmd(const char *cmd
, const cmdinfo_t
*ct
)
2343 help_oneline(cmd
, ct
);
2349 static void help_all(void)
2351 const cmdinfo_t
*ct
;
2353 for (ct
= cmdtab
; ct
< &cmdtab
[ncmds
]; ct
++) {
2354 help_oneline(ct
->name
, ct
);
2356 printf("\nUse 'help commandname' for extended help.\n");
2359 static int help_f(BlockBackend
*blk
, int argc
, char **argv
)
2361 const cmdinfo_t
*ct
;
2368 ct
= find_command(argv
[1]);
2370 printf("command %s not found\n", argv
[1]);
2374 help_onecmd(argv
[1], ct
);
2378 static const cmdinfo_t help_cmd
= {
2384 .flags
= CMD_FLAG_GLOBAL
,
2385 .args
= "[command]",
2386 .oneline
= "help for one or all commands",
2389 bool qemuio_command(BlockBackend
*blk
, const char *cmd
)
2392 const cmdinfo_t
*ct
;
2397 input
= g_strdup(cmd
);
2398 v
= breakline(input
, &c
);
2400 ct
= find_command(v
[0]);
2402 done
= command(blk
, ct
, c
, v
);
2404 fprintf(stderr
, "command \"%s\" not found\n", v
[0]);
2413 static void __attribute((constructor
)) init_qemuio_commands(void)
2415 /* initialize commands */
2416 qemuio_add_command(&help_cmd
);
2417 qemuio_add_command(&read_cmd
);
2418 qemuio_add_command(&readv_cmd
);
2419 qemuio_add_command(&write_cmd
);
2420 qemuio_add_command(&writev_cmd
);
2421 qemuio_add_command(&multiwrite_cmd
);
2422 qemuio_add_command(&aio_read_cmd
);
2423 qemuio_add_command(&aio_write_cmd
);
2424 qemuio_add_command(&aio_flush_cmd
);
2425 qemuio_add_command(&flush_cmd
);
2426 qemuio_add_command(&truncate_cmd
);
2427 qemuio_add_command(&length_cmd
);
2428 qemuio_add_command(&info_cmd
);
2429 qemuio_add_command(&discard_cmd
);
2430 qemuio_add_command(&alloc_cmd
);
2431 qemuio_add_command(&map_cmd
);
2432 qemuio_add_command(&reopen_cmd
);
2433 qemuio_add_command(&break_cmd
);
2434 qemuio_add_command(&remove_break_cmd
);
2435 qemuio_add_command(&resume_cmd
);
2436 qemuio_add_command(&wait_break_cmd
);
2437 qemuio_add_command(&abort_cmd
);
2438 qemuio_add_command(&sleep_cmd
);
2439 qemuio_add_command(&sigraise_cmd
);