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"
13 #include "qapi/qmp/qdict.h"
15 #include "sysemu/block-backend.h"
16 #include "block/block.h"
17 #include "block/block_int.h" /* for info_f() */
18 #include "block/qapi.h"
19 #include "qemu/error-report.h"
20 #include "qemu/main-loop.h"
21 #include "qemu/option.h"
22 #include "qemu/timer.h"
23 #include "qemu/cutils.h"
25 #define CMD_NOFILE_OK 0x01
29 static cmdinfo_t *cmdtab;
32 static int compare_cmdname(const void *a, const void *b)
34 return strcmp(((const cmdinfo_t *)a)->name,
35 ((const cmdinfo_t *)b)->name);
38 void qemuio_add_command(const cmdinfo_t *ci)
40 /* ci->perm assumes a file is open, but the GLOBAL and NOFILE_OK
41 * flags allow it not to be, so that combination is invalid.
42 * Catch it now rather than letting it manifest as a crash if a
43 * particular set of command line options are used.
45 assert(ci->perm == 0 ||
46 (ci->flags & (CMD_FLAG_GLOBAL | CMD_NOFILE_OK)) == 0);
47 cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
48 cmdtab[ncmds - 1] = *ci;
49 qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
52 void qemuio_command_usage(const cmdinfo_t *ci)
54 printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
57 static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct)
59 if (ct->flags & CMD_FLAG_GLOBAL) {
62 if (!(ct->flags & CMD_NOFILE_OK) && !blk) {
63 fprintf(stderr, "no file open, try 'help open'\n");
69 static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc,
74 if (!init_check_command(blk, ct)) {
78 if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) {
79 if (ct->argmax == -1) {
81 "bad argument count %d to %s, expected at least %d arguments\n",
82 argc-1, cmd, ct->argmin);
83 } else if (ct->argmin == ct->argmax) {
85 "bad argument count %d to %s, expected %d arguments\n",
86 argc-1, cmd, ct->argmin);
89 "bad argument count %d to %s, expected between %d and %d arguments\n",
90 argc-1, cmd, ct->argmin, ct->argmax);
96 * Request additional permissions if necessary for this command. The caller
97 * is responsible for restoring the original permissions afterwards if this
100 * Coverity thinks that blk may be NULL in the following if condition. It's
101 * not so: in init_check_command() we fail if blk is NULL for command with
102 * both CMD_FLAG_GLOBAL and CMD_NOFILE_OK flags unset. And in
103 * qemuio_add_command() we assert that command with non-zero .perm field
104 * doesn't set this flags. So, the following assertion is to silence
107 assert(blk || !ct->perm);
108 if (ct->perm && blk_is_available(blk)) {
109 uint64_t orig_perm, orig_shared_perm;
110 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
112 if (ct->perm & ~orig_perm) {
114 Error *local_err = NULL;
117 new_perm = orig_perm | ct->perm;
119 ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err);
121 error_report_err(local_err);
128 return ct->cfunc(blk, argc, argv);
131 static const cmdinfo_t *find_command(const char *cmd)
135 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
136 if (strcmp(ct->name, cmd) == 0 ||
137 (ct->altname && strcmp(ct->altname, cmd) == 0))
139 return (const cmdinfo_t *)ct;
145 /* Invoke fn() for commands with a matching prefix */
146 void qemuio_complete_command(const char *input,
147 void (*fn)(const char *cmd, void *opaque),
151 size_t input_len = strlen(input);
153 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
154 if (strncmp(input, ct->name, input_len) == 0) {
155 fn(ct->name, opaque);
160 static char **breakline(char *input, int *count)
164 char **rval = g_new0(char *, 1);
166 while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
171 rval = g_renew(char *, rval, (c + 1));
179 static int64_t cvtnum(const char *s)
184 err = qemu_strtosz(s, NULL, &value);
188 if (value > INT64_MAX) {
194 static void print_cvtnum_err(int64_t rc, const char *arg)
198 printf("Parsing error: non-numeric argument,"
199 " or extraneous/unrecognized suffix -- %s\n", arg);
202 printf("Parsing error: argument too large -- %s\n", arg);
205 printf("Parsing error: %s\n", arg);
209 #define EXABYTES(x) ((long long)(x) << 60)
210 #define PETABYTES(x) ((long long)(x) << 50)
211 #define TERABYTES(x) ((long long)(x) << 40)
212 #define GIGABYTES(x) ((long long)(x) << 30)
213 #define MEGABYTES(x) ((long long)(x) << 20)
214 #define KILOBYTES(x) ((long long)(x) << 10)
216 #define TO_EXABYTES(x) ((x) / EXABYTES(1))
217 #define TO_PETABYTES(x) ((x) / PETABYTES(1))
218 #define TO_TERABYTES(x) ((x) / TERABYTES(1))
219 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
220 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
221 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
223 static void cvtstr(double value, char *str, size_t size)
228 if (value >= EXABYTES(1)) {
230 snprintf(str, size - 4, "%.3f", TO_EXABYTES(value));
231 } else if (value >= PETABYTES(1)) {
233 snprintf(str, size - 4, "%.3f", TO_PETABYTES(value));
234 } else if (value >= TERABYTES(1)) {
236 snprintf(str, size - 4, "%.3f", TO_TERABYTES(value));
237 } else if (value >= GIGABYTES(1)) {
239 snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value));
240 } else if (value >= MEGABYTES(1)) {
242 snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value));
243 } else if (value >= KILOBYTES(1)) {
245 snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value));
248 snprintf(str, size - 6, "%f", value);
251 trim = strstr(str, ".000");
253 strcpy(trim, suffix);
261 static struct timespec tsub(struct timespec t1, struct timespec t2)
263 t1.tv_nsec -= t2.tv_nsec;
264 if (t1.tv_nsec < 0) {
265 t1.tv_nsec += NANOSECONDS_PER_SECOND;
268 t1.tv_sec -= t2.tv_sec;
272 static double tdiv(double value, struct timespec tv)
274 double seconds = tv.tv_sec + (tv.tv_nsec / 1e9);
275 return value / seconds;
278 #define HOURS(sec) ((sec) / (60 * 60))
279 #define MINUTES(sec) (((sec) % (60 * 60)) / 60)
280 #define SECONDS(sec) ((sec) % 60)
284 TERSE_FIXED_TIME = 0x1,
285 VERBOSE_FIXED_TIME = 0x2,
288 static void timestr(struct timespec *tv, char *ts, size_t size, int format)
290 double frac_sec = tv->tv_nsec / 1e9;
292 if (format & TERSE_FIXED_TIME) {
293 if (!HOURS(tv->tv_sec)) {
294 snprintf(ts, size, "%u:%05.2f",
295 (unsigned int) MINUTES(tv->tv_sec),
296 SECONDS(tv->tv_sec) + frac_sec);
299 format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
302 if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
303 snprintf(ts, size, "%u:%02u:%05.2f",
304 (unsigned int) HOURS(tv->tv_sec),
305 (unsigned int) MINUTES(tv->tv_sec),
306 SECONDS(tv->tv_sec) + frac_sec);
308 snprintf(ts, size, "%05.2f sec", frac_sec);
313 * Parse the pattern argument to various sub-commands.
315 * Because the pattern is used as an argument to memset it must evaluate
316 * to an unsigned integer that fits into a single byte.
318 static int parse_pattern(const char *arg)
323 pattern = strtol(arg, &endptr, 0);
324 if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
325 printf("%s is not a valid pattern byte\n", arg);
333 * Memory allocation helpers.
335 * Make sure memory is aligned by default, or purposefully misaligned if
336 * that is specified on the command line.
339 #define MISALIGN_OFFSET 16
340 static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern)
344 if (qemuio_misalign) {
345 len += MISALIGN_OFFSET;
347 buf = blk_blockalign(blk, len);
348 memset(buf, pattern, len);
349 if (qemuio_misalign) {
350 buf += MISALIGN_OFFSET;
355 static void qemu_io_free(void *p)
357 if (qemuio_misalign) {
358 p -= MISALIGN_OFFSET;
364 * qemu_io_alloc_from_file()
366 * Allocates the buffer and populates it with the content of the given file
367 * up to @len bytes. If the file length is less than @len, then the buffer
368 * is populated with the file content cyclically.
370 * @blk - the block backend where the buffer content is going to be written to
371 * @len - the buffer length
372 * @file_name - the file to read the content from
374 * Returns: the buffer pointer on success
377 static void *qemu_io_alloc_from_file(BlockBackend *blk, size_t len,
378 const char *file_name)
380 char *buf, *buf_origin;
381 FILE *f = fopen(file_name, "r");
389 if (qemuio_misalign) {
390 len += MISALIGN_OFFSET;
393 buf_origin = buf = blk_blockalign(blk, len);
395 if (qemuio_misalign) {
396 buf_origin += MISALIGN_OFFSET;
397 buf += MISALIGN_OFFSET;
398 len -= MISALIGN_OFFSET;
401 pattern_len = fread(buf_origin, 1, len, f);
408 if (pattern_len == 0) {
409 fprintf(stderr, "%s: file is empty\n", file_name);
416 if (len > pattern_len) {
421 size_t len_to_copy = MIN(pattern_len, len);
423 memcpy(buf, buf_origin, len_to_copy);
433 qemu_io_free(buf_origin);
440 static void dump_buffer(const void *buffer, int64_t offset, int64_t len)
446 for (i = 0, p = buffer; i < len; i += 16) {
447 const uint8_t *s = p;
449 printf("%08" PRIx64 ": ", offset + i);
450 for (j = 0; j < 16 && i + j < len; j++, p++) {
454 for (j = 0; j < 16 && i + j < len; j++, s++) {
465 static void print_report(const char *op, struct timespec *t, int64_t offset,
466 int64_t count, int64_t total, int cnt, bool Cflag)
468 char s1[64], s2[64], ts[64];
470 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
472 cvtstr((double)total, s1, sizeof(s1));
473 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
474 printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n",
475 op, total, count, offset);
476 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
477 s1, cnt, ts, s2, tdiv((double)cnt, *t));
478 } else {/* bytes,ops,time,bytes/sec,ops/sec */
479 printf("%"PRId64",%d,%s,%.3f,%.3f\n",
481 tdiv((double)total, *t),
482 tdiv((double)cnt, *t));
487 * Parse multiple length statements for vectored I/O, and construct an I/O
488 * vector matching it.
491 create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov,
494 size_t *sizes = g_new0(size_t, nr_iov);
500 for (i = 0; i < nr_iov; i++) {
506 print_cvtnum_err(len, arg);
510 if (len > BDRV_REQUEST_MAX_BYTES) {
511 printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg,
512 (uint64_t)BDRV_REQUEST_MAX_BYTES);
516 if (count > BDRV_REQUEST_MAX_BYTES - len) {
517 printf("The total number of bytes exceed the maximum size %" PRIu64
518 "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES);
526 qemu_iovec_init(qiov, nr_iov);
528 buf = p = qemu_io_alloc(blk, count, pattern);
530 for (i = 0; i < nr_iov; i++) {
531 qemu_iovec_add(qiov, p, sizes[i]);
540 static int do_pread(BlockBackend *blk, char *buf, int64_t offset,
541 int64_t bytes, int64_t *total)
543 if (bytes > INT_MAX) {
547 *total = blk_pread(blk, offset, (uint8_t *)buf, bytes);
554 static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
555 int64_t bytes, int flags, int64_t *total)
557 if (bytes > INT_MAX) {
561 *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags);
578 static void coroutine_fn co_pwrite_zeroes_entry(void *opaque)
580 CoWriteZeroes *data = opaque;
582 data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes,
586 *data->total = data->ret;
590 *data->total = data->bytes;
593 static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
594 int64_t bytes, int flags, int64_t *total)
597 CoWriteZeroes data = {
606 if (bytes > INT_MAX) {
610 co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data);
611 bdrv_coroutine_enter(blk_bs(blk), co);
613 aio_poll(blk_get_aio_context(blk), true);
622 static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
623 int64_t bytes, int64_t *total)
627 if (bytes > BDRV_REQUEST_MAX_BYTES) {
631 ret = blk_pwrite_compressed(blk, offset, buf, bytes);
639 static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset,
640 int64_t count, int64_t *total)
642 if (count > INT_MAX) {
646 *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count);
653 static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset,
654 int64_t count, int64_t *total)
656 if (count > INT_MAX) {
660 *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count);
667 #define NOT_DONE 0x7fffffff
668 static void aio_rw_done(void *opaque, int ret)
670 *(int *)opaque = ret;
673 static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov,
674 int64_t offset, int *total)
676 int async_ret = NOT_DONE;
678 blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret);
679 while (async_ret == NOT_DONE) {
680 main_loop_wait(false);
684 return async_ret < 0 ? async_ret : 1;
687 static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov,
688 int64_t offset, int flags, int *total)
690 int async_ret = NOT_DONE;
692 blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret);
693 while (async_ret == NOT_DONE) {
694 main_loop_wait(false);
698 return async_ret < 0 ? async_ret : 1;
701 static void read_help(void)
705 " reads a range of bytes from the given offset\n"
708 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
710 " Reads a segment of the currently open file, optionally dumping it to the\n"
711 " standard output stream (with -v option) for subsequent inspection.\n"
712 " -b, -- read from the VM state rather than the virtual disk\n"
713 " -C, -- report statistics in a machine parsable format\n"
714 " -l, -- length for pattern verification (only with -P)\n"
715 " -p, -- ignored for backwards compatibility\n"
716 " -P, -- use a pattern to verify read data\n"
717 " -q, -- quiet mode, do not show I/O statistics\n"
718 " -s, -- start offset for pattern verification (only with -P)\n"
719 " -v, -- dump buffer to standard output\n"
723 static int read_f(BlockBackend *blk, int argc, char **argv);
725 static const cmdinfo_t read_cmd = {
731 .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len",
732 .oneline = "reads a number of bytes at a specified offset",
736 static int read_f(BlockBackend *blk, int argc, char **argv)
738 struct timespec t1, t2;
739 bool Cflag = false, qflag = false, vflag = false;
740 bool Pflag = false, sflag = false, lflag = false, bflag = false;
745 /* Some compilers get confused and warn if this is not initialized. */
748 int64_t pattern_offset = 0, pattern_count = 0;
750 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) {
760 pattern_count = cvtnum(optarg);
761 if (pattern_count < 0) {
762 print_cvtnum_err(pattern_count, optarg);
763 return pattern_count;
767 /* Ignored for backwards compatibility */
771 pattern = parse_pattern(optarg);
781 pattern_offset = cvtnum(optarg);
782 if (pattern_offset < 0) {
783 print_cvtnum_err(pattern_offset, optarg);
784 return pattern_offset;
791 qemuio_command_usage(&read_cmd);
796 if (optind != argc - 2) {
797 qemuio_command_usage(&read_cmd);
801 offset = cvtnum(argv[optind]);
803 print_cvtnum_err(offset, argv[optind]);
808 count = cvtnum(argv[optind]);
810 print_cvtnum_err(count, argv[optind]);
812 } else if (count > BDRV_REQUEST_MAX_BYTES) {
813 printf("length cannot exceed %" PRIu64 ", given %s\n",
814 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
818 if (!Pflag && (lflag || sflag)) {
819 qemuio_command_usage(&read_cmd);
824 pattern_count = count - pattern_offset;
827 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
828 printf("pattern verification range exceeds end of read data\n");
833 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
834 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
838 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
839 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
845 buf = qemu_io_alloc(blk, count, 0xab);
847 clock_gettime(CLOCK_MONOTONIC, &t1);
849 ret = do_load_vmstate(blk, buf, offset, count, &total);
851 ret = do_pread(blk, buf, offset, count, &total);
853 clock_gettime(CLOCK_MONOTONIC, &t2);
856 printf("read failed: %s\n", strerror(-ret));
864 void *cmp_buf = g_malloc(pattern_count);
865 memset(cmp_buf, pattern, pattern_count);
866 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
867 printf("Pattern verification failed at offset %"
868 PRId64 ", %"PRId64" bytes\n",
869 offset + pattern_offset, pattern_count);
880 dump_buffer(buf, offset, count);
883 /* Finally, report back -- -C gives a parsable format */
885 print_report("read", &t2, offset, count, total, cnt, Cflag);
892 static void readv_help(void)
896 " reads a range of bytes from the given offset into multiple buffers\n"
899 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
901 " Reads a segment of the currently open file, optionally dumping it to the\n"
902 " standard output stream (with -v option) for subsequent inspection.\n"
903 " Uses multiple iovec buffers if more than one byte range is specified.\n"
904 " -C, -- report statistics in a machine parsable format\n"
905 " -P, -- use a pattern to verify read data\n"
906 " -v, -- dump buffer to standard output\n"
907 " -q, -- quiet mode, do not show I/O statistics\n"
911 static int readv_f(BlockBackend *blk, int argc, char **argv);
913 static const cmdinfo_t readv_cmd = {
918 .args = "[-Cqv] [-P pattern] off len [len..]",
919 .oneline = "reads a number of bytes at a specified offset",
923 static int readv_f(BlockBackend *blk, int argc, char **argv)
925 struct timespec t1, t2;
926 bool Cflag = false, qflag = false, vflag = false;
930 /* Some compilers get confused and warn if this is not initialized. */
937 while ((c = getopt(argc, argv, "CP:qv")) != -1) {
944 pattern = parse_pattern(optarg);
956 qemuio_command_usage(&readv_cmd);
961 if (optind > argc - 2) {
962 qemuio_command_usage(&readv_cmd);
967 offset = cvtnum(argv[optind]);
969 print_cvtnum_err(offset, argv[optind]);
974 nr_iov = argc - optind;
975 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
980 clock_gettime(CLOCK_MONOTONIC, &t1);
981 ret = do_aio_readv(blk, &qiov, offset, &total);
982 clock_gettime(CLOCK_MONOTONIC, &t2);
985 printf("readv failed: %s\n", strerror(-ret));
993 void *cmp_buf = g_malloc(qiov.size);
994 memset(cmp_buf, pattern, qiov.size);
995 if (memcmp(buf, cmp_buf, qiov.size)) {
996 printf("Pattern verification failed at offset %"
997 PRId64 ", %zu bytes\n", offset, qiov.size);
1008 dump_buffer(buf, offset, qiov.size);
1011 /* Finally, report back -- -C gives a parsable format */
1013 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
1016 qemu_iovec_destroy(&qiov);
1021 static void write_help(void)
1025 " writes a range of bytes from the given offset\n"
1028 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
1030 " Writes into a segment of the currently open file, using a buffer\n"
1031 " filled with a set pattern (0xcdcdcdcd).\n"
1032 " -b, -- write to the VM state rather than the virtual disk\n"
1033 " -c, -- write compressed data with blk_write_compressed\n"
1034 " -f, -- use Force Unit Access semantics\n"
1035 " -n, -- with -z, don't allow slow fallback\n"
1036 " -p, -- ignored for backwards compatibility\n"
1037 " -P, -- use different pattern to fill file\n"
1038 " -s, -- use a pattern file to fill the write buffer\n"
1039 " -C, -- report statistics in a machine parsable format\n"
1040 " -q, -- quiet mode, do not show I/O statistics\n"
1041 " -u, -- with -z, allow unmapping\n"
1042 " -z, -- write zeroes using blk_co_pwrite_zeroes\n"
1046 static int write_f(BlockBackend *blk, int argc, char **argv);
1048 static const cmdinfo_t write_cmd = {
1052 .perm = BLK_PERM_WRITE,
1055 .args = "[-bcCfnquz] [-P pattern | -s source_file] off len",
1056 .oneline = "writes a number of bytes at a specified offset",
1060 static int write_f(BlockBackend *blk, int argc, char **argv)
1062 struct timespec t1, t2;
1063 bool Cflag = false, qflag = false, bflag = false;
1064 bool Pflag = false, zflag = false, cflag = false, sflag = false;
1070 /* Some compilers get confused and warn if this is not initialized. */
1073 const char *file_name = NULL;
1075 while ((c = getopt(argc, argv, "bcCfnpP:qs:uz")) != -1) {
1087 flags |= BDRV_REQ_FUA;
1090 flags |= BDRV_REQ_NO_FALLBACK;
1093 /* Ignored for backwards compatibility */
1097 pattern = parse_pattern(optarg);
1110 flags |= BDRV_REQ_MAY_UNMAP;
1116 qemuio_command_usage(&write_cmd);
1121 if (optind != argc - 2) {
1122 qemuio_command_usage(&write_cmd);
1126 if (bflag && zflag) {
1127 printf("-b and -z cannot be specified at the same time\n");
1131 if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
1132 printf("-f and -b or -c cannot be specified at the same time\n");
1136 if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) {
1137 printf("-n requires -z to be specified\n");
1141 if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
1142 printf("-u requires -z to be specified\n");
1146 if (zflag + Pflag + sflag > 1) {
1147 printf("Only one of -z, -P, and -s "
1148 "can be specified at the same time\n");
1152 offset = cvtnum(argv[optind]);
1154 print_cvtnum_err(offset, argv[optind]);
1159 count = cvtnum(argv[optind]);
1161 print_cvtnum_err(count, argv[optind]);
1163 } else if (count > BDRV_REQUEST_MAX_BYTES) {
1164 printf("length cannot exceed %" PRIu64 ", given %s\n",
1165 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1169 if (bflag || cflag) {
1170 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
1171 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
1176 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
1177 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
1185 buf = qemu_io_alloc_from_file(blk, count, file_name);
1190 buf = qemu_io_alloc(blk, count, pattern);
1194 clock_gettime(CLOCK_MONOTONIC, &t1);
1196 ret = do_save_vmstate(blk, buf, offset, count, &total);
1198 ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
1200 ret = do_write_compressed(blk, buf, offset, count, &total);
1202 ret = do_pwrite(blk, buf, offset, count, flags, &total);
1204 clock_gettime(CLOCK_MONOTONIC, &t2);
1207 printf("write failed: %s\n", strerror(-ret));
1218 /* Finally, report back -- -C gives a parsable format */
1220 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1234 " writes a range of bytes from the given offset source from multiple buffers\n"
1237 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1239 " Writes into a segment of the currently open file, using a buffer\n"
1240 " filled with a set pattern (0xcdcdcdcd).\n"
1241 " -P, -- use different pattern to fill file\n"
1242 " -C, -- report statistics in a machine parsable format\n"
1243 " -f, -- use Force Unit Access semantics\n"
1244 " -q, -- quiet mode, do not show I/O statistics\n"
1248 static int writev_f(BlockBackend *blk, int argc, char **argv);
1250 static const cmdinfo_t writev_cmd = {
1253 .perm = BLK_PERM_WRITE,
1256 .args = "[-Cfq] [-P pattern] off len [len..]",
1257 .oneline = "writes a number of bytes at a specified offset",
1258 .help = writev_help,
1261 static int writev_f(BlockBackend *blk, int argc, char **argv)
1263 struct timespec t1, t2;
1264 bool Cflag = false, qflag = false;
1269 /* Some compilers get confused and warn if this is not initialized. */
1275 while ((c = getopt(argc, argv, "CfqP:")) != -1) {
1281 flags |= BDRV_REQ_FUA;
1287 pattern = parse_pattern(optarg);
1293 qemuio_command_usage(&writev_cmd);
1298 if (optind > argc - 2) {
1299 qemuio_command_usage(&writev_cmd);
1303 offset = cvtnum(argv[optind]);
1305 print_cvtnum_err(offset, argv[optind]);
1310 nr_iov = argc - optind;
1311 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
1316 clock_gettime(CLOCK_MONOTONIC, &t1);
1317 ret = do_aio_writev(blk, &qiov, offset, flags, &total);
1318 clock_gettime(CLOCK_MONOTONIC, &t2);
1321 printf("writev failed: %s\n", strerror(-ret));
1332 /* Finally, report back -- -C gives a parsable format */
1334 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1336 qemu_iovec_destroy(&qiov);
1351 BlockAcctCookie acct;
1356 static void aio_write_done(void *opaque, int ret)
1358 struct aio_ctx *ctx = opaque;
1361 clock_gettime(CLOCK_MONOTONIC, &t2);
1365 printf("aio_write failed: %s\n", strerror(-ret));
1366 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1370 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1376 /* Finally, report back -- -C gives a parsable format */
1377 t2 = tsub(t2, ctx->t1);
1378 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1379 ctx->qiov.size, 1, ctx->Cflag);
1382 qemu_io_free(ctx->buf);
1383 qemu_iovec_destroy(&ctx->qiov);
1388 static void aio_read_done(void *opaque, int ret)
1390 struct aio_ctx *ctx = opaque;
1393 clock_gettime(CLOCK_MONOTONIC, &t2);
1396 printf("readv failed: %s\n", strerror(-ret));
1397 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1402 void *cmp_buf = g_malloc(ctx->qiov.size);
1404 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1405 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1406 printf("Pattern verification failed at offset %"
1407 PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size);
1412 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1419 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1422 /* Finally, report back -- -C gives a parsable format */
1423 t2 = tsub(t2, ctx->t1);
1424 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1425 ctx->qiov.size, 1, ctx->Cflag);
1427 qemu_io_free(ctx->buf);
1428 qemu_iovec_destroy(&ctx->qiov);
1432 static void aio_read_help(void)
1436 " asynchronously reads a range of bytes from the given offset\n"
1439 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1441 " Reads a segment of the currently open file, optionally dumping it to the\n"
1442 " standard output stream (with -v option) for subsequent inspection.\n"
1443 " The read is performed asynchronously and the aio_flush command must be\n"
1444 " used to ensure all outstanding aio requests have been completed.\n"
1445 " Note that due to its asynchronous nature, this command will be\n"
1446 " considered successful once the request is submitted, independently\n"
1447 " of potential I/O errors or pattern mismatches.\n"
1448 " -C, -- report statistics in a machine parsable format\n"
1449 " -P, -- use a pattern to verify read data\n"
1450 " -i, -- treat request as invalid, for exercising stats\n"
1451 " -v, -- dump buffer to standard output\n"
1452 " -q, -- quiet mode, do not show I/O statistics\n"
1456 static int aio_read_f(BlockBackend *blk, int argc, char **argv);
1458 static const cmdinfo_t aio_read_cmd = {
1460 .cfunc = aio_read_f,
1463 .args = "[-Ciqv] [-P pattern] off len [len..]",
1464 .oneline = "asynchronously reads a number of bytes",
1465 .help = aio_read_help,
1468 static int aio_read_f(BlockBackend *blk, int argc, char **argv)
1471 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1474 while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
1481 ctx->pattern = parse_pattern(optarg);
1482 if (ctx->pattern < 0) {
1488 printf("injecting invalid read request\n");
1489 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1500 qemuio_command_usage(&aio_read_cmd);
1505 if (optind > argc - 2) {
1507 qemuio_command_usage(&aio_read_cmd);
1511 ctx->offset = cvtnum(argv[optind]);
1512 if (ctx->offset < 0) {
1513 int ret = ctx->offset;
1514 print_cvtnum_err(ret, argv[optind]);
1520 nr_iov = argc - optind;
1521 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1522 if (ctx->buf == NULL) {
1523 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1528 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1529 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1531 blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx);
1535 static void aio_write_help(void)
1539 " asynchronously writes a range of bytes from the given offset source\n"
1540 " from multiple buffers\n"
1543 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1545 " Writes into a segment of the currently open file, using a buffer\n"
1546 " filled with a set pattern (0xcdcdcdcd).\n"
1547 " The write is performed asynchronously and the aio_flush command must be\n"
1548 " used to ensure all outstanding aio requests have been completed.\n"
1549 " Note that due to its asynchronous nature, this command will be\n"
1550 " considered successful once the request is submitted, independently\n"
1551 " of potential I/O errors or pattern mismatches.\n"
1552 " -P, -- use different pattern to fill file\n"
1553 " -C, -- report statistics in a machine parsable format\n"
1554 " -f, -- use Force Unit Access semantics\n"
1555 " -i, -- treat request as invalid, for exercising stats\n"
1556 " -q, -- quiet mode, do not show I/O statistics\n"
1557 " -u, -- with -z, allow unmapping\n"
1558 " -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
1562 static int aio_write_f(BlockBackend *blk, int argc, char **argv);
1564 static const cmdinfo_t aio_write_cmd = {
1565 .name = "aio_write",
1566 .cfunc = aio_write_f,
1567 .perm = BLK_PERM_WRITE,
1570 .args = "[-Cfiquz] [-P pattern] off len [len..]",
1571 .oneline = "asynchronously writes a number of bytes",
1572 .help = aio_write_help,
1575 static int aio_write_f(BlockBackend *blk, int argc, char **argv)
1579 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1583 while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
1589 flags |= BDRV_REQ_FUA;
1595 flags |= BDRV_REQ_MAY_UNMAP;
1598 pattern = parse_pattern(optarg);
1605 printf("injecting invalid write request\n");
1606 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1614 qemuio_command_usage(&aio_write_cmd);
1619 if (optind > argc - 2) {
1621 qemuio_command_usage(&aio_write_cmd);
1625 if (ctx->zflag && optind != argc - 2) {
1626 printf("-z supports only a single length parameter\n");
1631 if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
1632 printf("-u requires -z to be specified\n");
1637 if (ctx->zflag && ctx->Pflag) {
1638 printf("-z and -P cannot be specified at the same time\n");
1643 ctx->offset = cvtnum(argv[optind]);
1644 if (ctx->offset < 0) {
1645 int ret = ctx->offset;
1646 print_cvtnum_err(ret, argv[optind]);
1653 int64_t count = cvtnum(argv[optind]);
1655 print_cvtnum_err(count, argv[optind]);
1660 ctx->qiov.size = count;
1661 blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
1664 nr_iov = argc - optind;
1665 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
1667 if (ctx->buf == NULL) {
1668 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1673 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1674 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1677 blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
1684 static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
1686 BlockAcctCookie cookie;
1687 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
1689 block_acct_done(blk_get_stats(blk), &cookie);
1693 static const cmdinfo_t aio_flush_cmd = {
1694 .name = "aio_flush",
1695 .cfunc = aio_flush_f,
1696 .oneline = "completes all outstanding aio requests"
1699 static int flush_f(BlockBackend *blk, int argc, char **argv)
1701 return blk_flush(blk);
1704 static const cmdinfo_t flush_cmd = {
1708 .oneline = "flush all in-core file state to disk",
1711 static int truncate_f(BlockBackend *blk, int argc, char **argv);
1712 static const cmdinfo_t truncate_cmd = {
1715 .cfunc = truncate_f,
1716 .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
1719 .args = "[-m prealloc_mode] off",
1720 .oneline = "truncates the current file at the given offset",
1723 static int truncate_f(BlockBackend *blk, int argc, char **argv)
1725 Error *local_err = NULL;
1728 PreallocMode prealloc = PREALLOC_MODE_OFF;
1730 while ((c = getopt(argc, argv, "m:")) != -1) {
1733 prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg,
1734 PREALLOC_MODE__MAX, NULL);
1735 if (prealloc == PREALLOC_MODE__MAX) {
1736 error_report("Invalid preallocation mode '%s'", optarg);
1741 qemuio_command_usage(&truncate_cmd);
1746 offset = cvtnum(argv[optind]);
1748 print_cvtnum_err(offset, argv[1]);
1753 * qemu-io is a debugging tool, so let us be strict here and pass
1754 * exact=true. It is better to err on the "emit more errors" side
1755 * than to be overly permissive.
1757 ret = blk_truncate(blk, offset, false, prealloc, 0, &local_err);
1759 error_report_err(local_err);
1766 static int length_f(BlockBackend *blk, int argc, char **argv)
1771 size = blk_getlength(blk);
1773 printf("getlength: %s\n", strerror(-size));
1777 cvtstr(size, s1, sizeof(s1));
1783 static const cmdinfo_t length_cmd = {
1787 .oneline = "gets the length of the current file",
1791 static int info_f(BlockBackend *blk, int argc, char **argv)
1793 BlockDriverState *bs = blk_bs(blk);
1794 BlockDriverInfo bdi;
1795 ImageInfoSpecific *spec_info;
1796 Error *local_err = NULL;
1797 char s1[64], s2[64];
1800 if (bs->drv && bs->drv->format_name) {
1801 printf("format name: %s\n", bs->drv->format_name);
1803 if (bs->drv && bs->drv->protocol_name) {
1804 printf("format name: %s\n", bs->drv->protocol_name);
1807 ret = bdrv_get_info(bs, &bdi);
1812 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1813 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1815 printf("cluster size: %s\n", s1);
1816 printf("vm state offset: %s\n", s2);
1818 spec_info = bdrv_get_specific_info(bs, &local_err);
1820 error_report_err(local_err);
1824 printf("Format specific information:\n");
1825 bdrv_image_info_specific_dump(spec_info);
1826 qapi_free_ImageInfoSpecific(spec_info);
1834 static const cmdinfo_t info_cmd = {
1838 .oneline = "prints information about the current file",
1841 static void discard_help(void)
1845 " discards a range of bytes from the given offset\n"
1848 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1850 " Discards a segment of the currently open file.\n"
1851 " -C, -- report statistics in a machine parsable format\n"
1852 " -q, -- quiet mode, do not show I/O statistics\n"
1856 static int discard_f(BlockBackend *blk, int argc, char **argv);
1858 static const cmdinfo_t discard_cmd = {
1862 .perm = BLK_PERM_WRITE,
1865 .args = "[-Cq] off len",
1866 .oneline = "discards a number of bytes at a specified offset",
1867 .help = discard_help,
1870 static int discard_f(BlockBackend *blk, int argc, char **argv)
1872 struct timespec t1, t2;
1873 bool Cflag = false, qflag = false;
1875 int64_t offset, bytes;
1877 while ((c = getopt(argc, argv, "Cq")) != -1) {
1886 qemuio_command_usage(&discard_cmd);
1891 if (optind != argc - 2) {
1892 qemuio_command_usage(&discard_cmd);
1896 offset = cvtnum(argv[optind]);
1898 print_cvtnum_err(offset, argv[optind]);
1903 bytes = cvtnum(argv[optind]);
1905 print_cvtnum_err(bytes, argv[optind]);
1907 } else if (bytes > BDRV_REQUEST_MAX_BYTES) {
1908 printf("length cannot exceed %"PRIu64", given %s\n",
1909 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1913 clock_gettime(CLOCK_MONOTONIC, &t1);
1914 ret = blk_pdiscard(blk, offset, bytes);
1915 clock_gettime(CLOCK_MONOTONIC, &t2);
1918 printf("discard failed: %s\n", strerror(-ret));
1922 /* Finally, report back -- -C gives a parsable format */
1925 print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
1931 static int alloc_f(BlockBackend *blk, int argc, char **argv)
1933 BlockDriverState *bs = blk_bs(blk);
1934 int64_t offset, start, remaining, count;
1937 int64_t num, sum_alloc;
1939 start = offset = cvtnum(argv[1]);
1941 print_cvtnum_err(offset, argv[1]);
1946 count = cvtnum(argv[2]);
1948 print_cvtnum_err(count, argv[2]);
1952 count = BDRV_SECTOR_SIZE;
1958 ret = bdrv_is_allocated(bs, offset, remaining, &num);
1960 printf("is_allocated failed: %s\n", strerror(-ret));
1974 cvtstr(start, s1, sizeof(s1));
1976 printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
1977 sum_alloc, count, s1);
1981 static const cmdinfo_t alloc_cmd = {
1987 .args = "offset [count]",
1988 .oneline = "checks if offset is allocated in the file",
1992 static int map_is_allocated(BlockDriverState *bs, int64_t offset,
1993 int64_t bytes, int64_t *pnum)
1999 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
2000 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
2008 while (bytes > 0 && ret == firstret) {
2012 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
2013 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
2014 if (ret == firstret && num) {
2024 static int map_f(BlockBackend *blk, int argc, char **argv)
2026 int64_t offset, bytes;
2027 char s1[64], s2[64];
2033 bytes = blk_getlength(blk);
2035 error_report("Failed to query image length: %s", strerror(-bytes));
2040 ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
2042 error_report("Failed to get allocation status: %s", strerror(-ret));
2045 error_report("Unexpected end of image");
2049 retstr = ret ? " allocated" : "not allocated";
2050 cvtstr(num, s1, sizeof(s1));
2051 cvtstr(offset, s2, sizeof(s2));
2052 printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
2053 s1, num, retstr, s2, offset);
2062 static const cmdinfo_t map_cmd = {
2068 .oneline = "prints the allocated areas of a file",
2071 static void reopen_help(void)
2075 " Changes the open options of an already opened image\n"
2078 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
2080 " -r, -- Reopen the image read-only\n"
2081 " -w, -- Reopen the image read-write\n"
2082 " -c, -- Change the cache mode to the given value\n"
2083 " -o, -- Changes block driver options (cf. 'open' command)\n"
2087 static int reopen_f(BlockBackend *blk, int argc, char **argv);
2089 static QemuOptsList reopen_opts = {
2091 .merge_lists = true,
2092 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
2094 /* no elements => accept any params */
2095 { /* end of list */ }
2099 static const cmdinfo_t reopen_cmd = {
2104 .args = "[(-r|-w)] [-c cache] [-o options]",
2105 .oneline = "reopens an image with new options",
2106 .help = reopen_help,
2109 static int reopen_f(BlockBackend *blk, int argc, char **argv)
2111 BlockDriverState *bs = blk_bs(blk);
2115 int flags = bs->open_flags;
2116 bool writethrough = !blk_enable_write_cache(blk);
2117 bool has_rw_option = false;
2118 bool has_cache_option = false;
2119 Error *local_err = NULL;
2121 while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
2124 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
2125 error_report("Invalid cache option: %s", optarg);
2128 has_cache_option = true;
2131 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
2132 qemu_opts_reset(&reopen_opts);
2137 if (has_rw_option) {
2138 error_report("Only one -r/-w option may be given");
2141 flags &= ~BDRV_O_RDWR;
2142 has_rw_option = true;
2145 if (has_rw_option) {
2146 error_report("Only one -r/-w option may be given");
2149 flags |= BDRV_O_RDWR;
2150 has_rw_option = true;
2153 qemu_opts_reset(&reopen_opts);
2154 qemuio_command_usage(&reopen_cmd);
2159 if (optind != argc) {
2160 qemu_opts_reset(&reopen_opts);
2161 qemuio_command_usage(&reopen_cmd);
2165 if (!writethrough != blk_enable_write_cache(blk) &&
2166 blk_get_attached_dev(blk))
2168 error_report("Cannot change cache.writeback: Device attached");
2169 qemu_opts_reset(&reopen_opts);
2173 if (!(flags & BDRV_O_RDWR)) {
2174 uint64_t orig_perm, orig_shared_perm;
2178 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
2180 orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
2185 qopts = qemu_opts_find(&reopen_opts, NULL);
2186 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new();
2187 qemu_opts_reset(&reopen_opts);
2189 if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) {
2190 if (has_rw_option) {
2191 error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'");
2192 qobject_unref(opts);
2196 qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR));
2199 if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) ||
2200 qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) {
2201 if (has_cache_option) {
2202 error_report("Cannot set both -c and the cache options");
2203 qobject_unref(opts);
2207 qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE);
2208 qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH);
2211 bdrv_reopen(bs, opts, true, &local_err);
2214 error_report_err(local_err);
2218 blk_set_enable_write_cache(blk, !writethrough);
2222 static int break_f(BlockBackend *blk, int argc, char **argv)
2226 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
2228 printf("Could not set breakpoint: %s\n", strerror(-ret));
2235 static int remove_break_f(BlockBackend *blk, int argc, char **argv)
2239 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
2241 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
2248 static const cmdinfo_t break_cmd = {
2253 .args = "event tag",
2254 .oneline = "sets a breakpoint on event and tags the stopped "
2258 static const cmdinfo_t remove_break_cmd = {
2259 .name = "remove_break",
2262 .cfunc = remove_break_f,
2264 .oneline = "remove a breakpoint by tag",
2267 static int resume_f(BlockBackend *blk, int argc, char **argv)
2271 ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
2273 printf("Could not resume request: %s\n", strerror(-ret));
2280 static const cmdinfo_t resume_cmd = {
2286 .oneline = "resumes the request tagged as tag",
2289 static int wait_break_f(BlockBackend *blk, int argc, char **argv)
2291 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
2292 aio_poll(blk_get_aio_context(blk), true);
2297 static const cmdinfo_t wait_break_cmd = {
2298 .name = "wait_break",
2301 .cfunc = wait_break_f,
2303 .oneline = "waits for the suspension of a request",
2306 static int abort_f(BlockBackend *blk, int argc, char **argv)
2311 static const cmdinfo_t abort_cmd = {
2314 .flags = CMD_NOFILE_OK,
2315 .oneline = "simulate a program crash using abort(3)",
2318 static void sigraise_help(void)
2322 " raises the given signal\n"
2325 " 'sigraise %i' - raises SIGTERM\n"
2327 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2328 " given to sigraise.\n"
2332 static int sigraise_f(BlockBackend *blk, int argc, char **argv);
2334 static const cmdinfo_t sigraise_cmd = {
2336 .cfunc = sigraise_f,
2339 .flags = CMD_NOFILE_OK,
2341 .oneline = "raises a signal",
2342 .help = sigraise_help,
2345 static int sigraise_f(BlockBackend *blk, int argc, char **argv)
2347 int64_t sig = cvtnum(argv[1]);
2349 print_cvtnum_err(sig, argv[1]);
2351 } else if (sig > NSIG) {
2352 printf("signal argument '%s' is too large to be a valid signal\n",
2357 /* Using raise() to kill this process does not necessarily flush all open
2358 * streams. At least stdout and stderr (although the latter should be
2359 * non-buffered anyway) should be flushed, though. */
2368 static void sleep_cb(void *opaque)
2370 bool *expired = opaque;
2374 static int sleep_f(BlockBackend *blk, int argc, char **argv)
2378 struct QEMUTimer *timer;
2379 bool expired = false;
2381 ms = strtol(argv[1], &endptr, 0);
2382 if (ms < 0 || *endptr != '\0') {
2383 printf("%s is not a valid number\n", argv[1]);
2387 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
2388 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);
2391 main_loop_wait(false);
2398 static const cmdinfo_t sleep_cmd = {
2403 .flags = CMD_NOFILE_OK,
2404 .oneline = "waits for the given value in milliseconds",
2407 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2412 printf("%s ", ct->args);
2414 printf("-- %s\n", ct->oneline);
2417 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2419 help_oneline(cmd, ct);
2425 static void help_all(void)
2427 const cmdinfo_t *ct;
2429 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2430 help_oneline(ct->name, ct);
2432 printf("\nUse 'help commandname' for extended help.\n");
2435 static int help_f(BlockBackend *blk, int argc, char **argv)
2437 const cmdinfo_t *ct;
2444 ct = find_command(argv[1]);
2446 printf("command %s not found\n", argv[1]);
2450 help_onecmd(argv[1], ct);
2454 static const cmdinfo_t help_cmd = {
2460 .flags = CMD_FLAG_GLOBAL,
2461 .args = "[command]",
2462 .oneline = "help for one or all commands",
2466 * Called with aio context of blk acquired. Or with qemu_get_aio_context()
2467 * context acquired if blk is NULL.
2469 int qemuio_command(BlockBackend *blk, const char *cmd)
2472 const cmdinfo_t *ct;
2477 input = g_strdup(cmd);
2478 v = breakline(input, &c);
2480 ct = find_command(v[0]);
2482 ret = command(blk, ct, c, v);
2484 fprintf(stderr, "command \"%s\" not found\n", v[0]);
2494 static void __attribute((constructor)) init_qemuio_commands(void)
2496 /* initialize commands */
2497 qemuio_add_command(&help_cmd);
2498 qemuio_add_command(&read_cmd);
2499 qemuio_add_command(&readv_cmd);
2500 qemuio_add_command(&write_cmd);
2501 qemuio_add_command(&writev_cmd);
2502 qemuio_add_command(&aio_read_cmd);
2503 qemuio_add_command(&aio_write_cmd);
2504 qemuio_add_command(&aio_flush_cmd);
2505 qemuio_add_command(&flush_cmd);
2506 qemuio_add_command(&truncate_cmd);
2507 qemuio_add_command(&length_cmd);
2508 qemuio_add_command(&info_cmd);
2509 qemuio_add_command(&discard_cmd);
2510 qemuio_add_command(&alloc_cmd);
2511 qemuio_add_command(&map_cmd);
2512 qemuio_add_command(&reopen_cmd);
2513 qemuio_add_command(&break_cmd);
2514 qemuio_add_command(&remove_break_cmd);
2515 qemuio_add_command(&resume_cmd);
2516 qemuio_add_command(&wait_break_cmd);
2517 qemuio_add_command(&abort_cmd);
2518 qemuio_add_command(&sleep_cmd);
2519 qemuio_add_command(&sigraise_cmd);