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"
24 #include "qemu/memalign.h"
26 #define CMD_NOFILE_OK 0x01
30 static cmdinfo_t *cmdtab;
33 static int compare_cmdname(const void *a, const void *b)
35 return strcmp(((const cmdinfo_t *)a)->name,
36 ((const cmdinfo_t *)b)->name);
39 void qemuio_add_command(const cmdinfo_t *ci)
41 /* ci->perm assumes a file is open, but the GLOBAL and NOFILE_OK
42 * flags allow it not to be, so that combination is invalid.
43 * Catch it now rather than letting it manifest as a crash if a
44 * particular set of command line options are used.
46 assert(ci->perm == 0 ||
47 (ci->flags & (CMD_FLAG_GLOBAL | CMD_NOFILE_OK)) == 0);
48 cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
49 cmdtab[ncmds - 1] = *ci;
50 qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
53 void qemuio_command_usage(const cmdinfo_t *ci)
55 printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline);
58 static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct)
60 if (ct->flags & CMD_FLAG_GLOBAL) {
63 if (!(ct->flags & CMD_NOFILE_OK) && !blk) {
64 fprintf(stderr, "no file open, try 'help open'\n");
70 static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc,
75 if (!init_check_command(blk, ct)) {
79 if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) {
80 if (ct->argmax == -1) {
82 "bad argument count %d to %s, expected at least %d arguments\n",
83 argc-1, cmd, ct->argmin);
84 } else if (ct->argmin == ct->argmax) {
86 "bad argument count %d to %s, expected %d arguments\n",
87 argc-1, cmd, ct->argmin);
90 "bad argument count %d to %s, expected between %d and %d arguments\n",
91 argc-1, cmd, ct->argmin, ct->argmax);
97 * Request additional permissions if necessary for this command. The caller
98 * is responsible for restoring the original permissions afterwards if this
101 * Coverity thinks that blk may be NULL in the following if condition. It's
102 * not so: in init_check_command() we fail if blk is NULL for command with
103 * both CMD_FLAG_GLOBAL and CMD_NOFILE_OK flags unset. And in
104 * qemuio_add_command() we assert that command with non-zero .perm field
105 * doesn't set this flags. So, the following assertion is to silence
108 assert(blk || !ct->perm);
109 if (ct->perm && blk_is_available(blk)) {
110 uint64_t orig_perm, orig_shared_perm;
111 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
113 if (ct->perm & ~orig_perm) {
115 Error *local_err = NULL;
118 new_perm = orig_perm | ct->perm;
120 ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err);
122 error_report_err(local_err);
129 return ct->cfunc(blk, argc, argv);
132 static const cmdinfo_t *find_command(const char *cmd)
136 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
137 if (strcmp(ct->name, cmd) == 0 ||
138 (ct->altname && strcmp(ct->altname, cmd) == 0))
140 return (const cmdinfo_t *)ct;
146 /* Invoke fn() for commands with a matching prefix */
147 void qemuio_complete_command(const char *input,
148 void (*fn)(const char *cmd, void *opaque),
152 size_t input_len = strlen(input);
154 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
155 if (strncmp(input, ct->name, input_len) == 0) {
156 fn(ct->name, opaque);
161 static char **breakline(char *input, int *count)
165 char **rval = g_new0(char *, 1);
167 while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
172 rval = g_renew(char *, rval, (c + 1));
180 static int64_t cvtnum(const char *s)
185 err = qemu_strtosz(s, NULL, &value);
189 if (value > INT64_MAX) {
195 static void print_cvtnum_err(int64_t rc, const char *arg)
199 printf("Parsing error: non-numeric argument,"
200 " or extraneous/unrecognized suffix -- %s\n", arg);
203 printf("Parsing error: argument too large -- %s\n", arg);
206 printf("Parsing error: %s\n", arg);
210 #define EXABYTES(x) ((long long)(x) << 60)
211 #define PETABYTES(x) ((long long)(x) << 50)
212 #define TERABYTES(x) ((long long)(x) << 40)
213 #define GIGABYTES(x) ((long long)(x) << 30)
214 #define MEGABYTES(x) ((long long)(x) << 20)
215 #define KILOBYTES(x) ((long long)(x) << 10)
217 #define TO_EXABYTES(x) ((x) / EXABYTES(1))
218 #define TO_PETABYTES(x) ((x) / PETABYTES(1))
219 #define TO_TERABYTES(x) ((x) / TERABYTES(1))
220 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
221 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
222 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
224 static void cvtstr(double value, char *str, size_t size)
229 if (value >= EXABYTES(1)) {
231 snprintf(str, size - 4, "%.3f", TO_EXABYTES(value));
232 } else if (value >= PETABYTES(1)) {
234 snprintf(str, size - 4, "%.3f", TO_PETABYTES(value));
235 } else if (value >= TERABYTES(1)) {
237 snprintf(str, size - 4, "%.3f", TO_TERABYTES(value));
238 } else if (value >= GIGABYTES(1)) {
240 snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value));
241 } else if (value >= MEGABYTES(1)) {
243 snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value));
244 } else if (value >= KILOBYTES(1)) {
246 snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value));
249 snprintf(str, size - 6, "%f", value);
252 trim = strstr(str, ".000");
254 strcpy(trim, suffix);
262 static struct timespec tsub(struct timespec t1, struct timespec t2)
264 t1.tv_nsec -= t2.tv_nsec;
265 if (t1.tv_nsec < 0) {
266 t1.tv_nsec += NANOSECONDS_PER_SECOND;
269 t1.tv_sec -= t2.tv_sec;
273 static double tdiv(double value, struct timespec tv)
275 double seconds = tv.tv_sec + (tv.tv_nsec / 1e9);
276 return value / seconds;
279 #define HOURS(sec) ((sec) / (60 * 60))
280 #define MINUTES(sec) (((sec) % (60 * 60)) / 60)
281 #define SECONDS(sec) ((sec) % 60)
285 TERSE_FIXED_TIME = 0x1,
286 VERBOSE_FIXED_TIME = 0x2,
289 static void timestr(struct timespec *tv, char *ts, size_t size, int format)
291 double frac_sec = tv->tv_nsec / 1e9;
293 if (format & TERSE_FIXED_TIME) {
294 if (!HOURS(tv->tv_sec)) {
295 snprintf(ts, size, "%u:%05.2f",
296 (unsigned int) MINUTES(tv->tv_sec),
297 SECONDS(tv->tv_sec) + frac_sec);
300 format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
303 if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
304 snprintf(ts, size, "%u:%02u:%05.2f",
305 (unsigned int) HOURS(tv->tv_sec),
306 (unsigned int) MINUTES(tv->tv_sec),
307 SECONDS(tv->tv_sec) + frac_sec);
309 snprintf(ts, size, "%05.2f sec", frac_sec);
314 * Parse the pattern argument to various sub-commands.
316 * Because the pattern is used as an argument to memset it must evaluate
317 * to an unsigned integer that fits into a single byte.
319 static int parse_pattern(const char *arg)
324 pattern = strtol(arg, &endptr, 0);
325 if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
326 printf("%s is not a valid pattern byte\n", arg);
334 * Memory allocation helpers.
336 * Make sure memory is aligned by default, or purposefully misaligned if
337 * that is specified on the command line.
340 #define MISALIGN_OFFSET 16
341 static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern)
345 if (qemuio_misalign) {
346 len += MISALIGN_OFFSET;
348 buf = blk_blockalign(blk, len);
349 memset(buf, pattern, len);
350 if (qemuio_misalign) {
351 buf += MISALIGN_OFFSET;
356 static void qemu_io_free(void *p)
358 if (qemuio_misalign) {
359 p -= MISALIGN_OFFSET;
365 * qemu_io_alloc_from_file()
367 * Allocates the buffer and populates it with the content of the given file
368 * up to @len bytes. If the file length is less than @len, then the buffer
369 * is populated with the file content cyclically.
371 * @blk - the block backend where the buffer content is going to be written to
372 * @len - the buffer length
373 * @file_name - the file to read the content from
375 * Returns: the buffer pointer on success
378 static void *qemu_io_alloc_from_file(BlockBackend *blk, size_t len,
379 const char *file_name)
381 char *buf, *buf_origin;
382 FILE *f = fopen(file_name, "r");
390 if (qemuio_misalign) {
391 len += MISALIGN_OFFSET;
394 buf_origin = buf = blk_blockalign(blk, len);
396 if (qemuio_misalign) {
397 buf_origin += MISALIGN_OFFSET;
398 buf += MISALIGN_OFFSET;
399 len -= MISALIGN_OFFSET;
402 pattern_len = fread(buf_origin, 1, len, f);
409 if (pattern_len == 0) {
410 fprintf(stderr, "%s: file is empty\n", file_name);
417 if (len > pattern_len) {
422 size_t len_to_copy = MIN(pattern_len, len);
424 memcpy(buf, buf_origin, len_to_copy);
434 qemu_io_free(buf_origin);
441 static void dump_buffer(const void *buffer, int64_t offset, int64_t len)
447 for (i = 0, p = buffer; i < len; i += 16) {
448 const uint8_t *s = p;
450 printf("%08" PRIx64 ": ", offset + i);
451 for (j = 0; j < 16 && i + j < len; j++, p++) {
455 for (j = 0; j < 16 && i + j < len; j++, s++) {
466 static void print_report(const char *op, struct timespec *t, int64_t offset,
467 int64_t count, int64_t total, int cnt, bool Cflag)
469 char s1[64], s2[64], ts[64];
471 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
473 cvtstr((double)total, s1, sizeof(s1));
474 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
475 printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n",
476 op, total, count, offset);
477 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
478 s1, cnt, ts, s2, tdiv((double)cnt, *t));
479 } else {/* bytes,ops,time,bytes/sec,ops/sec */
480 printf("%"PRId64",%d,%s,%.3f,%.3f\n",
482 tdiv((double)total, *t),
483 tdiv((double)cnt, *t));
488 * Parse multiple length statements for vectored I/O, and construct an I/O
489 * vector matching it.
492 create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov,
495 size_t *sizes = g_new0(size_t, nr_iov);
501 for (i = 0; i < nr_iov; i++) {
507 print_cvtnum_err(len, arg);
511 if (len > BDRV_REQUEST_MAX_BYTES) {
512 printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg,
513 (uint64_t)BDRV_REQUEST_MAX_BYTES);
517 if (count > BDRV_REQUEST_MAX_BYTES - len) {
518 printf("The total number of bytes exceed the maximum size %" PRIu64
519 "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES);
527 qemu_iovec_init(qiov, nr_iov);
529 buf = p = qemu_io_alloc(blk, count, pattern);
531 for (i = 0; i < nr_iov; i++) {
532 qemu_iovec_add(qiov, p, sizes[i]);
541 static int do_pread(BlockBackend *blk, char *buf, int64_t offset,
542 int64_t bytes, int64_t *total)
544 if (bytes > INT_MAX) {
548 *total = blk_pread(blk, offset, (uint8_t *)buf, bytes);
555 static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
556 int64_t bytes, int flags, int64_t *total)
558 if (bytes > INT_MAX) {
562 *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags);
579 static void coroutine_fn co_pwrite_zeroes_entry(void *opaque)
581 CoWriteZeroes *data = opaque;
583 data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes,
587 *data->total = data->ret;
591 *data->total = data->bytes;
594 static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
595 int64_t bytes, int flags, int64_t *total)
598 CoWriteZeroes data = {
607 co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data);
608 bdrv_coroutine_enter(blk_bs(blk), co);
610 aio_poll(blk_get_aio_context(blk), true);
619 static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
620 int64_t bytes, int64_t *total)
624 if (bytes > BDRV_REQUEST_MAX_BYTES) {
628 ret = blk_pwrite_compressed(blk, offset, buf, bytes);
636 static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset,
637 int64_t count, int64_t *total)
639 if (count > INT_MAX) {
643 *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count);
650 static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset,
651 int64_t count, int64_t *total)
653 if (count > INT_MAX) {
657 *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count);
664 #define NOT_DONE 0x7fffffff
665 static void aio_rw_done(void *opaque, int ret)
667 *(int *)opaque = ret;
670 static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov,
671 int64_t offset, int *total)
673 int async_ret = NOT_DONE;
675 blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret);
676 while (async_ret == NOT_DONE) {
677 main_loop_wait(false);
681 return async_ret < 0 ? async_ret : 1;
684 static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov,
685 int64_t offset, int flags, int *total)
687 int async_ret = NOT_DONE;
689 blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret);
690 while (async_ret == NOT_DONE) {
691 main_loop_wait(false);
695 return async_ret < 0 ? async_ret : 1;
698 static void read_help(void)
702 " reads a range of bytes from the given offset\n"
705 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
707 " Reads a segment of the currently open file, optionally dumping it to the\n"
708 " standard output stream (with -v option) for subsequent inspection.\n"
709 " -b, -- read from the VM state rather than the virtual disk\n"
710 " -C, -- report statistics in a machine parsable format\n"
711 " -l, -- length for pattern verification (only with -P)\n"
712 " -p, -- ignored for backwards compatibility\n"
713 " -P, -- use a pattern to verify read data\n"
714 " -q, -- quiet mode, do not show I/O statistics\n"
715 " -s, -- start offset for pattern verification (only with -P)\n"
716 " -v, -- dump buffer to standard output\n"
720 static int read_f(BlockBackend *blk, int argc, char **argv);
722 static const cmdinfo_t read_cmd = {
728 .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len",
729 .oneline = "reads a number of bytes at a specified offset",
733 static int read_f(BlockBackend *blk, int argc, char **argv)
735 struct timespec t1, t2;
736 bool Cflag = false, qflag = false, vflag = false;
737 bool Pflag = false, sflag = false, lflag = false, bflag = false;
742 /* Some compilers get confused and warn if this is not initialized. */
745 int64_t pattern_offset = 0, pattern_count = 0;
747 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) {
757 pattern_count = cvtnum(optarg);
758 if (pattern_count < 0) {
759 print_cvtnum_err(pattern_count, optarg);
760 return pattern_count;
764 /* Ignored for backwards compatibility */
768 pattern = parse_pattern(optarg);
778 pattern_offset = cvtnum(optarg);
779 if (pattern_offset < 0) {
780 print_cvtnum_err(pattern_offset, optarg);
781 return pattern_offset;
788 qemuio_command_usage(&read_cmd);
793 if (optind != argc - 2) {
794 qemuio_command_usage(&read_cmd);
798 offset = cvtnum(argv[optind]);
800 print_cvtnum_err(offset, argv[optind]);
805 count = cvtnum(argv[optind]);
807 print_cvtnum_err(count, argv[optind]);
809 } else if (count > BDRV_REQUEST_MAX_BYTES) {
810 printf("length cannot exceed %" PRIu64 ", given %s\n",
811 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
815 if (!Pflag && (lflag || sflag)) {
816 qemuio_command_usage(&read_cmd);
821 pattern_count = count - pattern_offset;
824 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
825 printf("pattern verification range exceeds end of read data\n");
830 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
831 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
835 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
836 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
842 buf = qemu_io_alloc(blk, count, 0xab);
844 clock_gettime(CLOCK_MONOTONIC, &t1);
846 ret = do_load_vmstate(blk, buf, offset, count, &total);
848 ret = do_pread(blk, buf, offset, count, &total);
850 clock_gettime(CLOCK_MONOTONIC, &t2);
853 printf("read failed: %s\n", strerror(-ret));
861 void *cmp_buf = g_malloc(pattern_count);
862 memset(cmp_buf, pattern, pattern_count);
863 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
864 printf("Pattern verification failed at offset %"
865 PRId64 ", %"PRId64" bytes\n",
866 offset + pattern_offset, pattern_count);
877 dump_buffer(buf, offset, count);
880 /* Finally, report back -- -C gives a parsable format */
882 print_report("read", &t2, offset, count, total, cnt, Cflag);
889 static void readv_help(void)
893 " reads a range of bytes from the given offset into multiple buffers\n"
896 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
898 " Reads a segment of the currently open file, optionally dumping it to the\n"
899 " standard output stream (with -v option) for subsequent inspection.\n"
900 " Uses multiple iovec buffers if more than one byte range is specified.\n"
901 " -C, -- report statistics in a machine parsable format\n"
902 " -P, -- use a pattern to verify read data\n"
903 " -v, -- dump buffer to standard output\n"
904 " -q, -- quiet mode, do not show I/O statistics\n"
908 static int readv_f(BlockBackend *blk, int argc, char **argv);
910 static const cmdinfo_t readv_cmd = {
915 .args = "[-Cqv] [-P pattern] off len [len..]",
916 .oneline = "reads a number of bytes at a specified offset",
920 static int readv_f(BlockBackend *blk, int argc, char **argv)
922 struct timespec t1, t2;
923 bool Cflag = false, qflag = false, vflag = false;
927 /* Some compilers get confused and warn if this is not initialized. */
934 while ((c = getopt(argc, argv, "CP:qv")) != -1) {
941 pattern = parse_pattern(optarg);
953 qemuio_command_usage(&readv_cmd);
958 if (optind > argc - 2) {
959 qemuio_command_usage(&readv_cmd);
964 offset = cvtnum(argv[optind]);
966 print_cvtnum_err(offset, argv[optind]);
971 nr_iov = argc - optind;
972 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
977 clock_gettime(CLOCK_MONOTONIC, &t1);
978 ret = do_aio_readv(blk, &qiov, offset, &total);
979 clock_gettime(CLOCK_MONOTONIC, &t2);
982 printf("readv failed: %s\n", strerror(-ret));
990 void *cmp_buf = g_malloc(qiov.size);
991 memset(cmp_buf, pattern, qiov.size);
992 if (memcmp(buf, cmp_buf, qiov.size)) {
993 printf("Pattern verification failed at offset %"
994 PRId64 ", %zu bytes\n", offset, qiov.size);
1005 dump_buffer(buf, offset, qiov.size);
1008 /* Finally, report back -- -C gives a parsable format */
1010 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
1013 qemu_iovec_destroy(&qiov);
1018 static void write_help(void)
1022 " writes a range of bytes from the given offset\n"
1025 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
1027 " Writes into a segment of the currently open file, using a buffer\n"
1028 " filled with a set pattern (0xcdcdcdcd).\n"
1029 " -b, -- write to the VM state rather than the virtual disk\n"
1030 " -c, -- write compressed data with blk_write_compressed\n"
1031 " -f, -- use Force Unit Access semantics\n"
1032 " -n, -- with -z, don't allow slow fallback\n"
1033 " -p, -- ignored for backwards compatibility\n"
1034 " -P, -- use different pattern to fill file\n"
1035 " -s, -- use a pattern file to fill the write buffer\n"
1036 " -C, -- report statistics in a machine parsable format\n"
1037 " -q, -- quiet mode, do not show I/O statistics\n"
1038 " -u, -- with -z, allow unmapping\n"
1039 " -z, -- write zeroes using blk_co_pwrite_zeroes\n"
1043 static int write_f(BlockBackend *blk, int argc, char **argv);
1045 static const cmdinfo_t write_cmd = {
1049 .perm = BLK_PERM_WRITE,
1052 .args = "[-bcCfnquz] [-P pattern | -s source_file] off len",
1053 .oneline = "writes a number of bytes at a specified offset",
1057 static int write_f(BlockBackend *blk, int argc, char **argv)
1059 struct timespec t1, t2;
1060 bool Cflag = false, qflag = false, bflag = false;
1061 bool Pflag = false, zflag = false, cflag = false, sflag = false;
1067 /* Some compilers get confused and warn if this is not initialized. */
1070 const char *file_name = NULL;
1072 while ((c = getopt(argc, argv, "bcCfnpP:qs:uz")) != -1) {
1084 flags |= BDRV_REQ_FUA;
1087 flags |= BDRV_REQ_NO_FALLBACK;
1090 /* Ignored for backwards compatibility */
1094 pattern = parse_pattern(optarg);
1107 flags |= BDRV_REQ_MAY_UNMAP;
1113 qemuio_command_usage(&write_cmd);
1118 if (optind != argc - 2) {
1119 qemuio_command_usage(&write_cmd);
1123 if (bflag && zflag) {
1124 printf("-b and -z cannot be specified at the same time\n");
1128 if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
1129 printf("-f and -b or -c cannot be specified at the same time\n");
1133 if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) {
1134 printf("-n requires -z to be specified\n");
1138 if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
1139 printf("-u requires -z to be specified\n");
1143 if (zflag + Pflag + sflag > 1) {
1144 printf("Only one of -z, -P, and -s "
1145 "can be specified at the same time\n");
1149 offset = cvtnum(argv[optind]);
1151 print_cvtnum_err(offset, argv[optind]);
1156 count = cvtnum(argv[optind]);
1158 print_cvtnum_err(count, argv[optind]);
1160 } else if (count > BDRV_REQUEST_MAX_BYTES &&
1161 !(flags & BDRV_REQ_NO_FALLBACK)) {
1162 printf("length cannot exceed %" PRIu64 " without -n, given %s\n",
1163 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1167 if (bflag || cflag) {
1168 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
1169 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
1174 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
1175 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
1183 buf = qemu_io_alloc_from_file(blk, count, file_name);
1188 buf = qemu_io_alloc(blk, count, pattern);
1192 clock_gettime(CLOCK_MONOTONIC, &t1);
1194 ret = do_save_vmstate(blk, buf, offset, count, &total);
1196 ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
1198 ret = do_write_compressed(blk, buf, offset, count, &total);
1200 ret = do_pwrite(blk, buf, offset, count, flags, &total);
1202 clock_gettime(CLOCK_MONOTONIC, &t2);
1205 printf("write failed: %s\n", strerror(-ret));
1216 /* Finally, report back -- -C gives a parsable format */
1218 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1232 " writes a range of bytes from the given offset source from multiple buffers\n"
1235 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1237 " Writes into a segment of the currently open file, using a buffer\n"
1238 " filled with a set pattern (0xcdcdcdcd).\n"
1239 " -P, -- use different pattern to fill file\n"
1240 " -C, -- report statistics in a machine parsable format\n"
1241 " -f, -- use Force Unit Access semantics\n"
1242 " -q, -- quiet mode, do not show I/O statistics\n"
1246 static int writev_f(BlockBackend *blk, int argc, char **argv);
1248 static const cmdinfo_t writev_cmd = {
1251 .perm = BLK_PERM_WRITE,
1254 .args = "[-Cfq] [-P pattern] off len [len..]",
1255 .oneline = "writes a number of bytes at a specified offset",
1256 .help = writev_help,
1259 static int writev_f(BlockBackend *blk, int argc, char **argv)
1261 struct timespec t1, t2;
1262 bool Cflag = false, qflag = false;
1267 /* Some compilers get confused and warn if this is not initialized. */
1273 while ((c = getopt(argc, argv, "CfqP:")) != -1) {
1279 flags |= BDRV_REQ_FUA;
1285 pattern = parse_pattern(optarg);
1291 qemuio_command_usage(&writev_cmd);
1296 if (optind > argc - 2) {
1297 qemuio_command_usage(&writev_cmd);
1301 offset = cvtnum(argv[optind]);
1303 print_cvtnum_err(offset, argv[optind]);
1308 nr_iov = argc - optind;
1309 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
1314 clock_gettime(CLOCK_MONOTONIC, &t1);
1315 ret = do_aio_writev(blk, &qiov, offset, flags, &total);
1316 clock_gettime(CLOCK_MONOTONIC, &t2);
1319 printf("writev failed: %s\n", strerror(-ret));
1330 /* Finally, report back -- -C gives a parsable format */
1332 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1334 qemu_iovec_destroy(&qiov);
1349 BlockAcctCookie acct;
1354 static void aio_write_done(void *opaque, int ret)
1356 struct aio_ctx *ctx = opaque;
1359 clock_gettime(CLOCK_MONOTONIC, &t2);
1363 printf("aio_write failed: %s\n", strerror(-ret));
1364 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1368 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1374 /* Finally, report back -- -C gives a parsable format */
1375 t2 = tsub(t2, ctx->t1);
1376 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1377 ctx->qiov.size, 1, ctx->Cflag);
1380 qemu_io_free(ctx->buf);
1381 qemu_iovec_destroy(&ctx->qiov);
1386 static void aio_read_done(void *opaque, int ret)
1388 struct aio_ctx *ctx = opaque;
1391 clock_gettime(CLOCK_MONOTONIC, &t2);
1394 printf("readv failed: %s\n", strerror(-ret));
1395 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1400 void *cmp_buf = g_malloc(ctx->qiov.size);
1402 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1403 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1404 printf("Pattern verification failed at offset %"
1405 PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size);
1410 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1417 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1420 /* Finally, report back -- -C gives a parsable format */
1421 t2 = tsub(t2, ctx->t1);
1422 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1423 ctx->qiov.size, 1, ctx->Cflag);
1425 qemu_io_free(ctx->buf);
1426 qemu_iovec_destroy(&ctx->qiov);
1430 static void aio_read_help(void)
1434 " asynchronously reads a range of bytes from the given offset\n"
1437 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1439 " Reads a segment of the currently open file, optionally dumping it to the\n"
1440 " standard output stream (with -v option) for subsequent inspection.\n"
1441 " The read is performed asynchronously and the aio_flush command must be\n"
1442 " used to ensure all outstanding aio requests have been completed.\n"
1443 " Note that due to its asynchronous nature, this command will be\n"
1444 " considered successful once the request is submitted, independently\n"
1445 " of potential I/O errors or pattern mismatches.\n"
1446 " -C, -- report statistics in a machine parsable format\n"
1447 " -P, -- use a pattern to verify read data\n"
1448 " -i, -- treat request as invalid, for exercising stats\n"
1449 " -v, -- dump buffer to standard output\n"
1450 " -q, -- quiet mode, do not show I/O statistics\n"
1454 static int aio_read_f(BlockBackend *blk, int argc, char **argv);
1456 static const cmdinfo_t aio_read_cmd = {
1458 .cfunc = aio_read_f,
1461 .args = "[-Ciqv] [-P pattern] off len [len..]",
1462 .oneline = "asynchronously reads a number of bytes",
1463 .help = aio_read_help,
1466 static int aio_read_f(BlockBackend *blk, int argc, char **argv)
1469 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1472 while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
1479 ctx->pattern = parse_pattern(optarg);
1480 if (ctx->pattern < 0) {
1486 printf("injecting invalid read request\n");
1487 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1498 qemuio_command_usage(&aio_read_cmd);
1503 if (optind > argc - 2) {
1505 qemuio_command_usage(&aio_read_cmd);
1509 ctx->offset = cvtnum(argv[optind]);
1510 if (ctx->offset < 0) {
1511 int ret = ctx->offset;
1512 print_cvtnum_err(ret, argv[optind]);
1518 nr_iov = argc - optind;
1519 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1520 if (ctx->buf == NULL) {
1521 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1526 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1527 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1529 blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx);
1533 static void aio_write_help(void)
1537 " asynchronously writes a range of bytes from the given offset source\n"
1538 " from multiple buffers\n"
1541 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1543 " Writes into a segment of the currently open file, using a buffer\n"
1544 " filled with a set pattern (0xcdcdcdcd).\n"
1545 " The write is performed asynchronously and the aio_flush command must be\n"
1546 " used to ensure all outstanding aio requests have been completed.\n"
1547 " Note that due to its asynchronous nature, this command will be\n"
1548 " considered successful once the request is submitted, independently\n"
1549 " of potential I/O errors or pattern mismatches.\n"
1550 " -P, -- use different pattern to fill file\n"
1551 " -C, -- report statistics in a machine parsable format\n"
1552 " -f, -- use Force Unit Access semantics\n"
1553 " -i, -- treat request as invalid, for exercising stats\n"
1554 " -q, -- quiet mode, do not show I/O statistics\n"
1555 " -u, -- with -z, allow unmapping\n"
1556 " -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
1560 static int aio_write_f(BlockBackend *blk, int argc, char **argv);
1562 static const cmdinfo_t aio_write_cmd = {
1563 .name = "aio_write",
1564 .cfunc = aio_write_f,
1565 .perm = BLK_PERM_WRITE,
1568 .args = "[-Cfiquz] [-P pattern] off len [len..]",
1569 .oneline = "asynchronously writes a number of bytes",
1570 .help = aio_write_help,
1573 static int aio_write_f(BlockBackend *blk, int argc, char **argv)
1577 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1581 while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
1587 flags |= BDRV_REQ_FUA;
1593 flags |= BDRV_REQ_MAY_UNMAP;
1596 pattern = parse_pattern(optarg);
1603 printf("injecting invalid write request\n");
1604 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1612 qemuio_command_usage(&aio_write_cmd);
1617 if (optind > argc - 2) {
1619 qemuio_command_usage(&aio_write_cmd);
1623 if (ctx->zflag && optind != argc - 2) {
1624 printf("-z supports only a single length parameter\n");
1629 if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
1630 printf("-u requires -z to be specified\n");
1635 if (ctx->zflag && ctx->Pflag) {
1636 printf("-z and -P cannot be specified at the same time\n");
1641 ctx->offset = cvtnum(argv[optind]);
1642 if (ctx->offset < 0) {
1643 int ret = ctx->offset;
1644 print_cvtnum_err(ret, argv[optind]);
1651 int64_t count = cvtnum(argv[optind]);
1653 print_cvtnum_err(count, argv[optind]);
1658 ctx->qiov.size = count;
1659 blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
1662 nr_iov = argc - optind;
1663 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
1665 if (ctx->buf == NULL) {
1666 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1671 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1672 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1675 blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
1682 static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
1684 BlockAcctCookie cookie;
1685 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
1687 block_acct_done(blk_get_stats(blk), &cookie);
1691 static const cmdinfo_t aio_flush_cmd = {
1692 .name = "aio_flush",
1693 .cfunc = aio_flush_f,
1694 .oneline = "completes all outstanding aio requests"
1697 static int flush_f(BlockBackend *blk, int argc, char **argv)
1699 return blk_flush(blk);
1702 static const cmdinfo_t flush_cmd = {
1706 .oneline = "flush all in-core file state to disk",
1709 static int truncate_f(BlockBackend *blk, int argc, char **argv);
1710 static const cmdinfo_t truncate_cmd = {
1713 .cfunc = truncate_f,
1714 .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
1717 .args = "[-m prealloc_mode] off",
1718 .oneline = "truncates the current file at the given offset",
1721 static int truncate_f(BlockBackend *blk, int argc, char **argv)
1723 Error *local_err = NULL;
1726 PreallocMode prealloc = PREALLOC_MODE_OFF;
1728 while ((c = getopt(argc, argv, "m:")) != -1) {
1731 prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg,
1732 PREALLOC_MODE__MAX, NULL);
1733 if (prealloc == PREALLOC_MODE__MAX) {
1734 error_report("Invalid preallocation mode '%s'", optarg);
1739 qemuio_command_usage(&truncate_cmd);
1744 offset = cvtnum(argv[optind]);
1746 print_cvtnum_err(offset, argv[1]);
1751 * qemu-io is a debugging tool, so let us be strict here and pass
1752 * exact=true. It is better to err on the "emit more errors" side
1753 * than to be overly permissive.
1755 ret = blk_truncate(blk, offset, false, prealloc, 0, &local_err);
1757 error_report_err(local_err);
1764 static int length_f(BlockBackend *blk, int argc, char **argv)
1769 size = blk_getlength(blk);
1771 printf("getlength: %s\n", strerror(-size));
1775 cvtstr(size, s1, sizeof(s1));
1781 static const cmdinfo_t length_cmd = {
1785 .oneline = "gets the length of the current file",
1789 static int info_f(BlockBackend *blk, int argc, char **argv)
1791 BlockDriverState *bs = blk_bs(blk);
1792 BlockDriverInfo bdi;
1793 ImageInfoSpecific *spec_info;
1794 Error *local_err = NULL;
1795 char s1[64], s2[64];
1798 if (bs->drv && bs->drv->format_name) {
1799 printf("format name: %s\n", bs->drv->format_name);
1801 if (bs->drv && bs->drv->protocol_name) {
1802 printf("format name: %s\n", bs->drv->protocol_name);
1805 ret = bdrv_get_info(bs, &bdi);
1810 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1811 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1813 printf("cluster size: %s\n", s1);
1814 printf("vm state offset: %s\n", s2);
1816 spec_info = bdrv_get_specific_info(bs, &local_err);
1818 error_report_err(local_err);
1822 printf("Format specific information:\n");
1823 bdrv_image_info_specific_dump(spec_info);
1824 qapi_free_ImageInfoSpecific(spec_info);
1832 static const cmdinfo_t info_cmd = {
1836 .oneline = "prints information about the current file",
1839 static void discard_help(void)
1843 " discards a range of bytes from the given offset\n"
1846 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1848 " Discards a segment of the currently open file.\n"
1849 " -C, -- report statistics in a machine parsable format\n"
1850 " -q, -- quiet mode, do not show I/O statistics\n"
1854 static int discard_f(BlockBackend *blk, int argc, char **argv);
1856 static const cmdinfo_t discard_cmd = {
1860 .perm = BLK_PERM_WRITE,
1863 .args = "[-Cq] off len",
1864 .oneline = "discards a number of bytes at a specified offset",
1865 .help = discard_help,
1868 static int discard_f(BlockBackend *blk, int argc, char **argv)
1870 struct timespec t1, t2;
1871 bool Cflag = false, qflag = false;
1873 int64_t offset, bytes;
1875 while ((c = getopt(argc, argv, "Cq")) != -1) {
1884 qemuio_command_usage(&discard_cmd);
1889 if (optind != argc - 2) {
1890 qemuio_command_usage(&discard_cmd);
1894 offset = cvtnum(argv[optind]);
1896 print_cvtnum_err(offset, argv[optind]);
1901 bytes = cvtnum(argv[optind]);
1903 print_cvtnum_err(bytes, argv[optind]);
1905 } else if (bytes > BDRV_REQUEST_MAX_BYTES) {
1906 printf("length cannot exceed %"PRIu64", given %s\n",
1907 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1911 clock_gettime(CLOCK_MONOTONIC, &t1);
1912 ret = blk_pdiscard(blk, offset, bytes);
1913 clock_gettime(CLOCK_MONOTONIC, &t2);
1916 printf("discard failed: %s\n", strerror(-ret));
1920 /* Finally, report back -- -C gives a parsable format */
1923 print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
1929 static int alloc_f(BlockBackend *blk, int argc, char **argv)
1931 BlockDriverState *bs = blk_bs(blk);
1932 int64_t offset, start, remaining, count;
1935 int64_t num, sum_alloc;
1937 start = offset = cvtnum(argv[1]);
1939 print_cvtnum_err(offset, argv[1]);
1944 count = cvtnum(argv[2]);
1946 print_cvtnum_err(count, argv[2]);
1950 count = BDRV_SECTOR_SIZE;
1956 ret = bdrv_is_allocated(bs, offset, remaining, &num);
1958 printf("is_allocated failed: %s\n", strerror(-ret));
1972 cvtstr(start, s1, sizeof(s1));
1974 printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
1975 sum_alloc, count, s1);
1979 static const cmdinfo_t alloc_cmd = {
1985 .args = "offset [count]",
1986 .oneline = "checks if offset is allocated in the file",
1990 static int map_is_allocated(BlockDriverState *bs, int64_t offset,
1991 int64_t bytes, int64_t *pnum)
1996 ret = bdrv_is_allocated(bs, offset, bytes, &num);
2004 while (bytes > 0 && ret == firstret) {
2008 ret = bdrv_is_allocated(bs, offset, bytes, &num);
2009 if (ret == firstret && num) {
2019 static int map_f(BlockBackend *blk, int argc, char **argv)
2021 int64_t offset, bytes;
2022 char s1[64], s2[64];
2028 bytes = blk_getlength(blk);
2030 error_report("Failed to query image length: %s", strerror(-bytes));
2035 ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
2037 error_report("Failed to get allocation status: %s", strerror(-ret));
2040 error_report("Unexpected end of image");
2044 retstr = ret ? " allocated" : "not allocated";
2045 cvtstr(num, s1, sizeof(s1));
2046 cvtstr(offset, s2, sizeof(s2));
2047 printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
2048 s1, num, retstr, s2, offset);
2057 static const cmdinfo_t map_cmd = {
2063 .oneline = "prints the allocated areas of a file",
2066 static void reopen_help(void)
2070 " Changes the open options of an already opened image\n"
2073 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
2075 " -r, -- Reopen the image read-only\n"
2076 " -w, -- Reopen the image read-write\n"
2077 " -c, -- Change the cache mode to the given value\n"
2078 " -o, -- Changes block driver options (cf. 'open' command)\n"
2082 static int reopen_f(BlockBackend *blk, int argc, char **argv);
2084 static QemuOptsList reopen_opts = {
2086 .merge_lists = true,
2087 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
2089 /* no elements => accept any params */
2090 { /* end of list */ }
2094 static const cmdinfo_t reopen_cmd = {
2099 .args = "[(-r|-w)] [-c cache] [-o options]",
2100 .oneline = "reopens an image with new options",
2101 .help = reopen_help,
2104 static int reopen_f(BlockBackend *blk, int argc, char **argv)
2106 BlockDriverState *bs = blk_bs(blk);
2110 int flags = bs->open_flags;
2111 bool writethrough = !blk_enable_write_cache(blk);
2112 bool has_rw_option = false;
2113 bool has_cache_option = false;
2114 Error *local_err = NULL;
2116 while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
2119 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
2120 error_report("Invalid cache option: %s", optarg);
2123 has_cache_option = true;
2126 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
2127 qemu_opts_reset(&reopen_opts);
2132 if (has_rw_option) {
2133 error_report("Only one -r/-w option may be given");
2136 flags &= ~BDRV_O_RDWR;
2137 has_rw_option = true;
2140 if (has_rw_option) {
2141 error_report("Only one -r/-w option may be given");
2144 flags |= BDRV_O_RDWR;
2145 has_rw_option = true;
2148 qemu_opts_reset(&reopen_opts);
2149 qemuio_command_usage(&reopen_cmd);
2154 if (optind != argc) {
2155 qemu_opts_reset(&reopen_opts);
2156 qemuio_command_usage(&reopen_cmd);
2160 if (!writethrough != blk_enable_write_cache(blk) &&
2161 blk_get_attached_dev(blk))
2163 error_report("Cannot change cache.writeback: Device attached");
2164 qemu_opts_reset(&reopen_opts);
2168 if (!(flags & BDRV_O_RDWR)) {
2169 uint64_t orig_perm, orig_shared_perm;
2173 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
2175 orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
2180 qopts = qemu_opts_find(&reopen_opts, NULL);
2181 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new();
2182 qemu_opts_reset(&reopen_opts);
2184 if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) {
2185 if (has_rw_option) {
2186 error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'");
2187 qobject_unref(opts);
2191 qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR));
2194 if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) ||
2195 qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) {
2196 if (has_cache_option) {
2197 error_report("Cannot set both -c and the cache options");
2198 qobject_unref(opts);
2202 qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE);
2203 qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH);
2206 bdrv_reopen(bs, opts, true, &local_err);
2209 error_report_err(local_err);
2213 blk_set_enable_write_cache(blk, !writethrough);
2217 static int break_f(BlockBackend *blk, int argc, char **argv)
2221 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
2223 printf("Could not set breakpoint: %s\n", strerror(-ret));
2230 static int remove_break_f(BlockBackend *blk, int argc, char **argv)
2234 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
2236 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
2243 static const cmdinfo_t break_cmd = {
2248 .args = "event tag",
2249 .oneline = "sets a breakpoint on event and tags the stopped "
2253 static const cmdinfo_t remove_break_cmd = {
2254 .name = "remove_break",
2257 .cfunc = remove_break_f,
2259 .oneline = "remove a breakpoint by tag",
2262 static int resume_f(BlockBackend *blk, int argc, char **argv)
2266 ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
2268 printf("Could not resume request: %s\n", strerror(-ret));
2275 static const cmdinfo_t resume_cmd = {
2281 .oneline = "resumes the request tagged as tag",
2284 static int wait_break_f(BlockBackend *blk, int argc, char **argv)
2286 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
2287 aio_poll(blk_get_aio_context(blk), true);
2292 static const cmdinfo_t wait_break_cmd = {
2293 .name = "wait_break",
2296 .cfunc = wait_break_f,
2298 .oneline = "waits for the suspension of a request",
2301 static int abort_f(BlockBackend *blk, int argc, char **argv)
2306 static const cmdinfo_t abort_cmd = {
2309 .flags = CMD_NOFILE_OK,
2310 .oneline = "simulate a program crash using abort(3)",
2313 static void sigraise_help(void)
2317 " raises the given signal\n"
2320 " 'sigraise %i' - raises SIGTERM\n"
2322 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2323 " given to sigraise.\n"
2327 static int sigraise_f(BlockBackend *blk, int argc, char **argv);
2329 static const cmdinfo_t sigraise_cmd = {
2331 .cfunc = sigraise_f,
2334 .flags = CMD_NOFILE_OK,
2336 .oneline = "raises a signal",
2337 .help = sigraise_help,
2340 static int sigraise_f(BlockBackend *blk, int argc, char **argv)
2342 int64_t sig = cvtnum(argv[1]);
2344 print_cvtnum_err(sig, argv[1]);
2346 } else if (sig > NSIG) {
2347 printf("signal argument '%s' is too large to be a valid signal\n",
2352 /* Using raise() to kill this process does not necessarily flush all open
2353 * streams. At least stdout and stderr (although the latter should be
2354 * non-buffered anyway) should be flushed, though. */
2363 static void sleep_cb(void *opaque)
2365 bool *expired = opaque;
2369 static int sleep_f(BlockBackend *blk, int argc, char **argv)
2373 struct QEMUTimer *timer;
2374 bool expired = false;
2376 ms = strtol(argv[1], &endptr, 0);
2377 if (ms < 0 || *endptr != '\0') {
2378 printf("%s is not a valid number\n", argv[1]);
2382 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
2383 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);
2386 main_loop_wait(false);
2393 static const cmdinfo_t sleep_cmd = {
2398 .flags = CMD_NOFILE_OK,
2399 .oneline = "waits for the given value in milliseconds",
2402 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2407 printf("%s ", ct->args);
2409 printf("-- %s\n", ct->oneline);
2412 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2414 help_oneline(cmd, ct);
2420 static void help_all(void)
2422 const cmdinfo_t *ct;
2424 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2425 help_oneline(ct->name, ct);
2427 printf("\nUse 'help commandname' for extended help.\n");
2430 static int help_f(BlockBackend *blk, int argc, char **argv)
2432 const cmdinfo_t *ct;
2439 ct = find_command(argv[1]);
2441 printf("command %s not found\n", argv[1]);
2445 help_onecmd(argv[1], ct);
2449 static const cmdinfo_t help_cmd = {
2455 .flags = CMD_FLAG_GLOBAL,
2456 .args = "[command]",
2457 .oneline = "help for one or all commands",
2461 * Called with aio context of blk acquired. Or with qemu_get_aio_context()
2462 * context acquired if blk is NULL.
2464 int qemuio_command(BlockBackend *blk, const char *cmd)
2467 const cmdinfo_t *ct;
2472 input = g_strdup(cmd);
2473 v = breakline(input, &c);
2475 ct = find_command(v[0]);
2477 ret = command(blk, ct, c, v);
2479 fprintf(stderr, "command \"%s\" not found\n", v[0]);
2489 static void __attribute((constructor)) init_qemuio_commands(void)
2491 /* initialize commands */
2492 qemuio_add_command(&help_cmd);
2493 qemuio_add_command(&read_cmd);
2494 qemuio_add_command(&readv_cmd);
2495 qemuio_add_command(&write_cmd);
2496 qemuio_add_command(&writev_cmd);
2497 qemuio_add_command(&aio_read_cmd);
2498 qemuio_add_command(&aio_write_cmd);
2499 qemuio_add_command(&aio_flush_cmd);
2500 qemuio_add_command(&flush_cmd);
2501 qemuio_add_command(&truncate_cmd);
2502 qemuio_add_command(&length_cmd);
2503 qemuio_add_command(&info_cmd);
2504 qemuio_add_command(&discard_cmd);
2505 qemuio_add_command(&alloc_cmd);
2506 qemuio_add_command(&map_cmd);
2507 qemuio_add_command(&reopen_cmd);
2508 qemuio_add_command(&break_cmd);
2509 qemuio_add_command(&remove_break_cmd);
2510 qemuio_add_command(&resume_cmd);
2511 qemuio_add_command(&wait_break_cmd);
2512 qemuio_add_command(&abort_cmd);
2513 qemuio_add_command(&sleep_cmd);
2514 qemuio_add_command(&sigraise_cmd);