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);
95 /* Request additional permissions if necessary for this command. The caller
96 * is responsible for restoring the original permissions afterwards if this
97 * is what it wants. */
98 if (ct->perm && blk_is_available(blk)) {
99 uint64_t orig_perm, orig_shared_perm;
100 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
102 if (ct->perm & ~orig_perm) {
104 Error *local_err = NULL;
107 new_perm = orig_perm | ct->perm;
109 ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err);
111 error_report_err(local_err);
118 return ct->cfunc(blk, argc, argv);
121 static const cmdinfo_t *find_command(const char *cmd)
125 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
126 if (strcmp(ct->name, cmd) == 0 ||
127 (ct->altname && strcmp(ct->altname, cmd) == 0))
129 return (const cmdinfo_t *)ct;
135 /* Invoke fn() for commands with a matching prefix */
136 void qemuio_complete_command(const char *input,
137 void (*fn)(const char *cmd, void *opaque),
141 size_t input_len = strlen(input);
143 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
144 if (strncmp(input, ct->name, input_len) == 0) {
145 fn(ct->name, opaque);
150 static char **breakline(char *input, int *count)
154 char **rval = g_new0(char *, 1);
156 while (rval && (p = qemu_strsep(&input, " ")) != NULL) {
161 rval = g_renew(char *, rval, (c + 1));
169 static int64_t cvtnum(const char *s)
174 err = qemu_strtosz(s, NULL, &value);
178 if (value > INT64_MAX) {
184 static void print_cvtnum_err(int64_t rc, const char *arg)
188 printf("Parsing error: non-numeric argument,"
189 " or extraneous/unrecognized suffix -- %s\n", arg);
192 printf("Parsing error: argument too large -- %s\n", arg);
195 printf("Parsing error: %s\n", arg);
199 #define EXABYTES(x) ((long long)(x) << 60)
200 #define PETABYTES(x) ((long long)(x) << 50)
201 #define TERABYTES(x) ((long long)(x) << 40)
202 #define GIGABYTES(x) ((long long)(x) << 30)
203 #define MEGABYTES(x) ((long long)(x) << 20)
204 #define KILOBYTES(x) ((long long)(x) << 10)
206 #define TO_EXABYTES(x) ((x) / EXABYTES(1))
207 #define TO_PETABYTES(x) ((x) / PETABYTES(1))
208 #define TO_TERABYTES(x) ((x) / TERABYTES(1))
209 #define TO_GIGABYTES(x) ((x) / GIGABYTES(1))
210 #define TO_MEGABYTES(x) ((x) / MEGABYTES(1))
211 #define TO_KILOBYTES(x) ((x) / KILOBYTES(1))
213 static void cvtstr(double value, char *str, size_t size)
218 if (value >= EXABYTES(1)) {
220 snprintf(str, size - 4, "%.3f", TO_EXABYTES(value));
221 } else if (value >= PETABYTES(1)) {
223 snprintf(str, size - 4, "%.3f", TO_PETABYTES(value));
224 } else if (value >= TERABYTES(1)) {
226 snprintf(str, size - 4, "%.3f", TO_TERABYTES(value));
227 } else if (value >= GIGABYTES(1)) {
229 snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value));
230 } else if (value >= MEGABYTES(1)) {
232 snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value));
233 } else if (value >= KILOBYTES(1)) {
235 snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value));
238 snprintf(str, size - 6, "%f", value);
241 trim = strstr(str, ".000");
243 strcpy(trim, suffix);
251 static struct timeval tsub(struct timeval t1, struct timeval t2)
253 t1.tv_usec -= t2.tv_usec;
254 if (t1.tv_usec < 0) {
255 t1.tv_usec += 1000000;
258 t1.tv_sec -= t2.tv_sec;
262 static double tdiv(double value, struct timeval tv)
264 return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0));
267 #define HOURS(sec) ((sec) / (60 * 60))
268 #define MINUTES(sec) (((sec) % (60 * 60)) / 60)
269 #define SECONDS(sec) ((sec) % 60)
273 TERSE_FIXED_TIME = 0x1,
274 VERBOSE_FIXED_TIME = 0x2,
277 static void timestr(struct timeval *tv, char *ts, size_t size, int format)
279 double usec = (double)tv->tv_usec / 1000000.0;
281 if (format & TERSE_FIXED_TIME) {
282 if (!HOURS(tv->tv_sec)) {
283 snprintf(ts, size, "%u:%02u.%02u",
284 (unsigned int) MINUTES(tv->tv_sec),
285 (unsigned int) SECONDS(tv->tv_sec),
286 (unsigned int) (usec * 100));
289 format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */
292 if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) {
293 snprintf(ts, size, "%u:%02u:%02u.%02u",
294 (unsigned int) HOURS(tv->tv_sec),
295 (unsigned int) MINUTES(tv->tv_sec),
296 (unsigned int) SECONDS(tv->tv_sec),
297 (unsigned int) (usec * 100));
299 snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000));
304 * Parse the pattern argument to various sub-commands.
306 * Because the pattern is used as an argument to memset it must evaluate
307 * to an unsigned integer that fits into a single byte.
309 static int parse_pattern(const char *arg)
314 pattern = strtol(arg, &endptr, 0);
315 if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') {
316 printf("%s is not a valid pattern byte\n", arg);
324 * Memory allocation helpers.
326 * Make sure memory is aligned by default, or purposefully misaligned if
327 * that is specified on the command line.
330 #define MISALIGN_OFFSET 16
331 static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern)
335 if (qemuio_misalign) {
336 len += MISALIGN_OFFSET;
338 buf = blk_blockalign(blk, len);
339 memset(buf, pattern, len);
340 if (qemuio_misalign) {
341 buf += MISALIGN_OFFSET;
346 static void qemu_io_free(void *p)
348 if (qemuio_misalign) {
349 p -= MISALIGN_OFFSET;
354 static void dump_buffer(const void *buffer, int64_t offset, int64_t len)
360 for (i = 0, p = buffer; i < len; i += 16) {
361 const uint8_t *s = p;
363 printf("%08" PRIx64 ": ", offset + i);
364 for (j = 0; j < 16 && i + j < len; j++, p++) {
368 for (j = 0; j < 16 && i + j < len; j++, s++) {
379 static void print_report(const char *op, struct timeval *t, int64_t offset,
380 int64_t count, int64_t total, int cnt, bool Cflag)
382 char s1[64], s2[64], ts[64];
384 timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0);
386 cvtstr((double)total, s1, sizeof(s1));
387 cvtstr(tdiv((double)total, *t), s2, sizeof(s2));
388 printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n",
389 op, total, count, offset);
390 printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n",
391 s1, cnt, ts, s2, tdiv((double)cnt, *t));
392 } else {/* bytes,ops,time,bytes/sec,ops/sec */
393 printf("%"PRId64",%d,%s,%.3f,%.3f\n",
395 tdiv((double)total, *t),
396 tdiv((double)cnt, *t));
401 * Parse multiple length statements for vectored I/O, and construct an I/O
402 * vector matching it.
405 create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov,
408 size_t *sizes = g_new0(size_t, nr_iov);
414 for (i = 0; i < nr_iov; i++) {
420 print_cvtnum_err(len, arg);
424 if (len > BDRV_REQUEST_MAX_BYTES) {
425 printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg,
426 (uint64_t)BDRV_REQUEST_MAX_BYTES);
430 if (count > BDRV_REQUEST_MAX_BYTES - len) {
431 printf("The total number of bytes exceed the maximum size %" PRIu64
432 "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES);
440 qemu_iovec_init(qiov, nr_iov);
442 buf = p = qemu_io_alloc(blk, count, pattern);
444 for (i = 0; i < nr_iov; i++) {
445 qemu_iovec_add(qiov, p, sizes[i]);
454 static int do_pread(BlockBackend *blk, char *buf, int64_t offset,
455 int64_t bytes, int64_t *total)
457 if (bytes > INT_MAX) {
461 *total = blk_pread(blk, offset, (uint8_t *)buf, bytes);
468 static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
469 int64_t bytes, int flags, int64_t *total)
471 if (bytes > INT_MAX) {
475 *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags);
492 static void coroutine_fn co_pwrite_zeroes_entry(void *opaque)
494 CoWriteZeroes *data = opaque;
496 data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes,
500 *data->total = data->ret;
504 *data->total = data->bytes;
507 static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
508 int64_t bytes, int flags, int64_t *total)
511 CoWriteZeroes data = {
520 if (bytes > INT_MAX) {
524 co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data);
525 bdrv_coroutine_enter(blk_bs(blk), co);
527 aio_poll(blk_get_aio_context(blk), true);
536 static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
537 int64_t bytes, int64_t *total)
541 if (bytes >> 9 > BDRV_REQUEST_MAX_SECTORS) {
545 ret = blk_pwrite_compressed(blk, offset, buf, bytes);
553 static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset,
554 int64_t count, int64_t *total)
556 if (count > INT_MAX) {
560 *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count);
567 static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset,
568 int64_t count, int64_t *total)
570 if (count > INT_MAX) {
574 *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count);
581 #define NOT_DONE 0x7fffffff
582 static void aio_rw_done(void *opaque, int ret)
584 *(int *)opaque = ret;
587 static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov,
588 int64_t offset, int *total)
590 int async_ret = NOT_DONE;
592 blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret);
593 while (async_ret == NOT_DONE) {
594 main_loop_wait(false);
598 return async_ret < 0 ? async_ret : 1;
601 static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov,
602 int64_t offset, int flags, int *total)
604 int async_ret = NOT_DONE;
606 blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret);
607 while (async_ret == NOT_DONE) {
608 main_loop_wait(false);
612 return async_ret < 0 ? async_ret : 1;
615 static void read_help(void)
619 " reads a range of bytes from the given offset\n"
622 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
624 " Reads a segment of the currently open file, optionally dumping it to the\n"
625 " standard output stream (with -v option) for subsequent inspection.\n"
626 " -b, -- read from the VM state rather than the virtual disk\n"
627 " -C, -- report statistics in a machine parsable format\n"
628 " -l, -- length for pattern verification (only with -P)\n"
629 " -p, -- ignored for backwards compatibility\n"
630 " -P, -- use a pattern to verify read data\n"
631 " -q, -- quiet mode, do not show I/O statistics\n"
632 " -s, -- start offset for pattern verification (only with -P)\n"
633 " -v, -- dump buffer to standard output\n"
637 static int read_f(BlockBackend *blk, int argc, char **argv);
639 static const cmdinfo_t read_cmd = {
645 .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len",
646 .oneline = "reads a number of bytes at a specified offset",
650 static int read_f(BlockBackend *blk, int argc, char **argv)
652 struct timeval t1, t2;
653 bool Cflag = false, qflag = false, vflag = false;
654 bool Pflag = false, sflag = false, lflag = false, bflag = false;
659 /* Some compilers get confused and warn if this is not initialized. */
662 int64_t pattern_offset = 0, pattern_count = 0;
664 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) {
674 pattern_count = cvtnum(optarg);
675 if (pattern_count < 0) {
676 print_cvtnum_err(pattern_count, optarg);
677 return pattern_count;
681 /* Ignored for backwards compatibility */
685 pattern = parse_pattern(optarg);
695 pattern_offset = cvtnum(optarg);
696 if (pattern_offset < 0) {
697 print_cvtnum_err(pattern_offset, optarg);
698 return pattern_offset;
705 qemuio_command_usage(&read_cmd);
710 if (optind != argc - 2) {
711 qemuio_command_usage(&read_cmd);
715 offset = cvtnum(argv[optind]);
717 print_cvtnum_err(offset, argv[optind]);
722 count = cvtnum(argv[optind]);
724 print_cvtnum_err(count, argv[optind]);
726 } else if (count > BDRV_REQUEST_MAX_BYTES) {
727 printf("length cannot exceed %" PRIu64 ", given %s\n",
728 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
732 if (!Pflag && (lflag || sflag)) {
733 qemuio_command_usage(&read_cmd);
738 pattern_count = count - pattern_offset;
741 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
742 printf("pattern verification range exceeds end of read data\n");
747 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
748 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
752 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
753 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
759 buf = qemu_io_alloc(blk, count, 0xab);
761 gettimeofday(&t1, NULL);
763 ret = do_load_vmstate(blk, buf, offset, count, &total);
765 ret = do_pread(blk, buf, offset, count, &total);
767 gettimeofday(&t2, NULL);
770 printf("read failed: %s\n", strerror(-ret));
778 void *cmp_buf = g_malloc(pattern_count);
779 memset(cmp_buf, pattern, pattern_count);
780 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
781 printf("Pattern verification failed at offset %"
782 PRId64 ", %"PRId64" bytes\n",
783 offset + pattern_offset, pattern_count);
794 dump_buffer(buf, offset, count);
797 /* Finally, report back -- -C gives a parsable format */
799 print_report("read", &t2, offset, count, total, cnt, Cflag);
806 static void readv_help(void)
810 " reads a range of bytes from the given offset into multiple buffers\n"
813 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
815 " Reads a segment of the currently open file, optionally dumping it to the\n"
816 " standard output stream (with -v option) for subsequent inspection.\n"
817 " Uses multiple iovec buffers if more than one byte range is specified.\n"
818 " -C, -- report statistics in a machine parsable format\n"
819 " -P, -- use a pattern to verify read data\n"
820 " -v, -- dump buffer to standard output\n"
821 " -q, -- quiet mode, do not show I/O statistics\n"
825 static int readv_f(BlockBackend *blk, int argc, char **argv);
827 static const cmdinfo_t readv_cmd = {
832 .args = "[-Cqv] [-P pattern] off len [len..]",
833 .oneline = "reads a number of bytes at a specified offset",
837 static int readv_f(BlockBackend *blk, int argc, char **argv)
839 struct timeval t1, t2;
840 bool Cflag = false, qflag = false, vflag = false;
844 /* Some compilers get confused and warn if this is not initialized. */
851 while ((c = getopt(argc, argv, "CP:qv")) != -1) {
858 pattern = parse_pattern(optarg);
870 qemuio_command_usage(&readv_cmd);
875 if (optind > argc - 2) {
876 qemuio_command_usage(&readv_cmd);
881 offset = cvtnum(argv[optind]);
883 print_cvtnum_err(offset, argv[optind]);
888 nr_iov = argc - optind;
889 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
894 gettimeofday(&t1, NULL);
895 ret = do_aio_readv(blk, &qiov, offset, &total);
896 gettimeofday(&t2, NULL);
899 printf("readv failed: %s\n", strerror(-ret));
907 void *cmp_buf = g_malloc(qiov.size);
908 memset(cmp_buf, pattern, qiov.size);
909 if (memcmp(buf, cmp_buf, qiov.size)) {
910 printf("Pattern verification failed at offset %"
911 PRId64 ", %zu bytes\n", offset, qiov.size);
922 dump_buffer(buf, offset, qiov.size);
925 /* Finally, report back -- -C gives a parsable format */
927 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
930 qemu_iovec_destroy(&qiov);
935 static void write_help(void)
939 " writes a range of bytes from the given offset\n"
942 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
944 " Writes into a segment of the currently open file, using a buffer\n"
945 " filled with a set pattern (0xcdcdcdcd).\n"
946 " -b, -- write to the VM state rather than the virtual disk\n"
947 " -c, -- write compressed data with blk_write_compressed\n"
948 " -f, -- use Force Unit Access semantics\n"
949 " -p, -- ignored for backwards compatibility\n"
950 " -P, -- use different pattern to fill file\n"
951 " -C, -- report statistics in a machine parsable format\n"
952 " -q, -- quiet mode, do not show I/O statistics\n"
953 " -u, -- with -z, allow unmapping\n"
954 " -z, -- write zeroes using blk_co_pwrite_zeroes\n"
958 static int write_f(BlockBackend *blk, int argc, char **argv);
960 static const cmdinfo_t write_cmd = {
964 .perm = BLK_PERM_WRITE,
967 .args = "[-bcCfquz] [-P pattern] off len",
968 .oneline = "writes a number of bytes at a specified offset",
972 static int write_f(BlockBackend *blk, int argc, char **argv)
974 struct timeval t1, t2;
975 bool Cflag = false, qflag = false, bflag = false;
976 bool Pflag = false, zflag = false, cflag = false;
982 /* Some compilers get confused and warn if this is not initialized. */
986 while ((c = getopt(argc, argv, "bcCfpP:quz")) != -1) {
998 flags |= BDRV_REQ_FUA;
1001 /* Ignored for backwards compatibility */
1005 pattern = parse_pattern(optarg);
1014 flags |= BDRV_REQ_MAY_UNMAP;
1020 qemuio_command_usage(&write_cmd);
1025 if (optind != argc - 2) {
1026 qemuio_command_usage(&write_cmd);
1030 if (bflag && zflag) {
1031 printf("-b and -z cannot be specified at the same time\n");
1035 if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
1036 printf("-f and -b or -c cannot be specified at the same time\n");
1040 if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
1041 printf("-u requires -z to be specified\n");
1045 if (zflag && Pflag) {
1046 printf("-z and -P cannot be specified at the same time\n");
1050 offset = cvtnum(argv[optind]);
1052 print_cvtnum_err(offset, argv[optind]);
1057 count = cvtnum(argv[optind]);
1059 print_cvtnum_err(count, argv[optind]);
1061 } else if (count > BDRV_REQUEST_MAX_BYTES) {
1062 printf("length cannot exceed %" PRIu64 ", given %s\n",
1063 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1067 if (bflag || cflag) {
1068 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
1069 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
1074 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
1075 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
1082 buf = qemu_io_alloc(blk, count, pattern);
1085 gettimeofday(&t1, NULL);
1087 ret = do_save_vmstate(blk, buf, offset, count, &total);
1089 ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
1091 ret = do_write_compressed(blk, buf, offset, count, &total);
1093 ret = do_pwrite(blk, buf, offset, count, flags, &total);
1095 gettimeofday(&t2, NULL);
1098 printf("write failed: %s\n", strerror(-ret));
1109 /* Finally, report back -- -C gives a parsable format */
1111 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1125 " writes a range of bytes from the given offset source from multiple buffers\n"
1128 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1130 " Writes into a segment of the currently open file, using a buffer\n"
1131 " filled with a set pattern (0xcdcdcdcd).\n"
1132 " -P, -- use different pattern to fill file\n"
1133 " -C, -- report statistics in a machine parsable format\n"
1134 " -f, -- use Force Unit Access semantics\n"
1135 " -q, -- quiet mode, do not show I/O statistics\n"
1139 static int writev_f(BlockBackend *blk, int argc, char **argv);
1141 static const cmdinfo_t writev_cmd = {
1144 .perm = BLK_PERM_WRITE,
1147 .args = "[-Cfq] [-P pattern] off len [len..]",
1148 .oneline = "writes a number of bytes at a specified offset",
1149 .help = writev_help,
1152 static int writev_f(BlockBackend *blk, int argc, char **argv)
1154 struct timeval t1, t2;
1155 bool Cflag = false, qflag = false;
1160 /* Some compilers get confused and warn if this is not initialized. */
1166 while ((c = getopt(argc, argv, "CfqP:")) != -1) {
1172 flags |= BDRV_REQ_FUA;
1178 pattern = parse_pattern(optarg);
1184 qemuio_command_usage(&writev_cmd);
1189 if (optind > argc - 2) {
1190 qemuio_command_usage(&writev_cmd);
1194 offset = cvtnum(argv[optind]);
1196 print_cvtnum_err(offset, argv[optind]);
1201 nr_iov = argc - optind;
1202 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
1207 gettimeofday(&t1, NULL);
1208 ret = do_aio_writev(blk, &qiov, offset, flags, &total);
1209 gettimeofday(&t2, NULL);
1212 printf("writev failed: %s\n", strerror(-ret));
1223 /* Finally, report back -- -C gives a parsable format */
1225 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1227 qemu_iovec_destroy(&qiov);
1242 BlockAcctCookie acct;
1247 static void aio_write_done(void *opaque, int ret)
1249 struct aio_ctx *ctx = opaque;
1252 gettimeofday(&t2, NULL);
1256 printf("aio_write failed: %s\n", strerror(-ret));
1257 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1261 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1267 /* Finally, report back -- -C gives a parsable format */
1268 t2 = tsub(t2, ctx->t1);
1269 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1270 ctx->qiov.size, 1, ctx->Cflag);
1273 qemu_io_free(ctx->buf);
1274 qemu_iovec_destroy(&ctx->qiov);
1279 static void aio_read_done(void *opaque, int ret)
1281 struct aio_ctx *ctx = opaque;
1284 gettimeofday(&t2, NULL);
1287 printf("readv failed: %s\n", strerror(-ret));
1288 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1293 void *cmp_buf = g_malloc(ctx->qiov.size);
1295 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1296 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1297 printf("Pattern verification failed at offset %"
1298 PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size);
1303 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1310 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1313 /* Finally, report back -- -C gives a parsable format */
1314 t2 = tsub(t2, ctx->t1);
1315 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1316 ctx->qiov.size, 1, ctx->Cflag);
1318 qemu_io_free(ctx->buf);
1319 qemu_iovec_destroy(&ctx->qiov);
1323 static void aio_read_help(void)
1327 " asynchronously reads a range of bytes from the given offset\n"
1330 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1332 " Reads a segment of the currently open file, optionally dumping it to the\n"
1333 " standard output stream (with -v option) for subsequent inspection.\n"
1334 " The read is performed asynchronously and the aio_flush command must be\n"
1335 " used to ensure all outstanding aio requests have been completed.\n"
1336 " Note that due to its asynchronous nature, this command will be\n"
1337 " considered successful once the request is submitted, independently\n"
1338 " of potential I/O errors or pattern mismatches.\n"
1339 " -C, -- report statistics in a machine parsable format\n"
1340 " -P, -- use a pattern to verify read data\n"
1341 " -i, -- treat request as invalid, for exercising stats\n"
1342 " -v, -- dump buffer to standard output\n"
1343 " -q, -- quiet mode, do not show I/O statistics\n"
1347 static int aio_read_f(BlockBackend *blk, int argc, char **argv);
1349 static const cmdinfo_t aio_read_cmd = {
1351 .cfunc = aio_read_f,
1354 .args = "[-Ciqv] [-P pattern] off len [len..]",
1355 .oneline = "asynchronously reads a number of bytes",
1356 .help = aio_read_help,
1359 static int aio_read_f(BlockBackend *blk, int argc, char **argv)
1362 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1365 while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
1372 ctx->pattern = parse_pattern(optarg);
1373 if (ctx->pattern < 0) {
1379 printf("injecting invalid read request\n");
1380 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1391 qemuio_command_usage(&aio_read_cmd);
1396 if (optind > argc - 2) {
1398 qemuio_command_usage(&aio_read_cmd);
1402 ctx->offset = cvtnum(argv[optind]);
1403 if (ctx->offset < 0) {
1404 int ret = ctx->offset;
1405 print_cvtnum_err(ret, argv[optind]);
1411 nr_iov = argc - optind;
1412 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1413 if (ctx->buf == NULL) {
1414 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1419 gettimeofday(&ctx->t1, NULL);
1420 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1422 blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx);
1426 static void aio_write_help(void)
1430 " asynchronously writes a range of bytes from the given offset source\n"
1431 " from multiple buffers\n"
1434 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1436 " Writes into a segment of the currently open file, using a buffer\n"
1437 " filled with a set pattern (0xcdcdcdcd).\n"
1438 " The write is performed asynchronously and the aio_flush command must be\n"
1439 " used to ensure all outstanding aio requests have been completed.\n"
1440 " Note that due to its asynchronous nature, this command will be\n"
1441 " considered successful once the request is submitted, independently\n"
1442 " of potential I/O errors or pattern mismatches.\n"
1443 " -P, -- use different pattern to fill file\n"
1444 " -C, -- report statistics in a machine parsable format\n"
1445 " -f, -- use Force Unit Access semantics\n"
1446 " -i, -- treat request as invalid, for exercising stats\n"
1447 " -q, -- quiet mode, do not show I/O statistics\n"
1448 " -u, -- with -z, allow unmapping\n"
1449 " -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
1453 static int aio_write_f(BlockBackend *blk, int argc, char **argv);
1455 static const cmdinfo_t aio_write_cmd = {
1456 .name = "aio_write",
1457 .cfunc = aio_write_f,
1458 .perm = BLK_PERM_WRITE,
1461 .args = "[-Cfiquz] [-P pattern] off len [len..]",
1462 .oneline = "asynchronously writes a number of bytes",
1463 .help = aio_write_help,
1466 static int aio_write_f(BlockBackend *blk, int argc, char **argv)
1470 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1474 while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
1480 flags |= BDRV_REQ_FUA;
1486 flags |= BDRV_REQ_MAY_UNMAP;
1489 pattern = parse_pattern(optarg);
1496 printf("injecting invalid write request\n");
1497 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1505 qemuio_command_usage(&aio_write_cmd);
1510 if (optind > argc - 2) {
1512 qemuio_command_usage(&aio_write_cmd);
1516 if (ctx->zflag && optind != argc - 2) {
1517 printf("-z supports only a single length parameter\n");
1522 if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
1523 printf("-u requires -z to be specified\n");
1528 if (ctx->zflag && ctx->Pflag) {
1529 printf("-z and -P cannot be specified at the same time\n");
1534 ctx->offset = cvtnum(argv[optind]);
1535 if (ctx->offset < 0) {
1536 int ret = ctx->offset;
1537 print_cvtnum_err(ret, argv[optind]);
1544 int64_t count = cvtnum(argv[optind]);
1546 print_cvtnum_err(count, argv[optind]);
1551 ctx->qiov.size = count;
1552 blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
1555 nr_iov = argc - optind;
1556 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
1558 if (ctx->buf == NULL) {
1559 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1564 gettimeofday(&ctx->t1, NULL);
1565 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1568 blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
1575 static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
1577 BlockAcctCookie cookie;
1578 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
1580 block_acct_done(blk_get_stats(blk), &cookie);
1584 static const cmdinfo_t aio_flush_cmd = {
1585 .name = "aio_flush",
1586 .cfunc = aio_flush_f,
1587 .oneline = "completes all outstanding aio requests"
1590 static int flush_f(BlockBackend *blk, int argc, char **argv)
1592 return blk_flush(blk);
1595 static const cmdinfo_t flush_cmd = {
1599 .oneline = "flush all in-core file state to disk",
1602 static int truncate_f(BlockBackend *blk, int argc, char **argv)
1604 Error *local_err = NULL;
1608 offset = cvtnum(argv[1]);
1610 print_cvtnum_err(offset, argv[1]);
1614 ret = blk_truncate(blk, offset, PREALLOC_MODE_OFF, &local_err);
1616 error_report_err(local_err);
1623 static const cmdinfo_t truncate_cmd = {
1626 .cfunc = truncate_f,
1627 .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
1631 .oneline = "truncates the current file at the given offset",
1634 static int length_f(BlockBackend *blk, int argc, char **argv)
1639 size = blk_getlength(blk);
1641 printf("getlength: %s\n", strerror(-size));
1645 cvtstr(size, s1, sizeof(s1));
1651 static const cmdinfo_t length_cmd = {
1655 .oneline = "gets the length of the current file",
1659 static int info_f(BlockBackend *blk, int argc, char **argv)
1661 BlockDriverState *bs = blk_bs(blk);
1662 BlockDriverInfo bdi;
1663 ImageInfoSpecific *spec_info;
1664 Error *local_err = NULL;
1665 char s1[64], s2[64];
1668 if (bs->drv && bs->drv->format_name) {
1669 printf("format name: %s\n", bs->drv->format_name);
1671 if (bs->drv && bs->drv->protocol_name) {
1672 printf("format name: %s\n", bs->drv->protocol_name);
1675 ret = bdrv_get_info(bs, &bdi);
1680 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1681 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1683 printf("cluster size: %s\n", s1);
1684 printf("vm state offset: %s\n", s2);
1686 spec_info = bdrv_get_specific_info(bs, &local_err);
1688 error_report_err(local_err);
1692 printf("Format specific information:\n");
1693 bdrv_image_info_specific_dump(fprintf, stdout, spec_info);
1694 qapi_free_ImageInfoSpecific(spec_info);
1702 static const cmdinfo_t info_cmd = {
1706 .oneline = "prints information about the current file",
1709 static void discard_help(void)
1713 " discards a range of bytes from the given offset\n"
1716 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1718 " Discards a segment of the currently open file.\n"
1719 " -C, -- report statistics in a machine parsable format\n"
1720 " -q, -- quiet mode, do not show I/O statistics\n"
1724 static int discard_f(BlockBackend *blk, int argc, char **argv);
1726 static const cmdinfo_t discard_cmd = {
1730 .perm = BLK_PERM_WRITE,
1733 .args = "[-Cq] off len",
1734 .oneline = "discards a number of bytes at a specified offset",
1735 .help = discard_help,
1738 static int discard_f(BlockBackend *blk, int argc, char **argv)
1740 struct timeval t1, t2;
1741 bool Cflag = false, qflag = false;
1743 int64_t offset, bytes;
1745 while ((c = getopt(argc, argv, "Cq")) != -1) {
1754 qemuio_command_usage(&discard_cmd);
1759 if (optind != argc - 2) {
1760 qemuio_command_usage(&discard_cmd);
1764 offset = cvtnum(argv[optind]);
1766 print_cvtnum_err(offset, argv[optind]);
1771 bytes = cvtnum(argv[optind]);
1773 print_cvtnum_err(bytes, argv[optind]);
1775 } else if (bytes >> BDRV_SECTOR_BITS > BDRV_REQUEST_MAX_SECTORS) {
1776 printf("length cannot exceed %"PRIu64", given %s\n",
1777 (uint64_t)BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS,
1782 gettimeofday(&t1, NULL);
1783 ret = blk_pdiscard(blk, offset, bytes);
1784 gettimeofday(&t2, NULL);
1787 printf("discard failed: %s\n", strerror(-ret));
1791 /* Finally, report back -- -C gives a parsable format */
1794 print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
1800 static int alloc_f(BlockBackend *blk, int argc, char **argv)
1802 BlockDriverState *bs = blk_bs(blk);
1803 int64_t offset, start, remaining, count;
1806 int64_t num, sum_alloc;
1808 start = offset = cvtnum(argv[1]);
1810 print_cvtnum_err(offset, argv[1]);
1815 count = cvtnum(argv[2]);
1817 print_cvtnum_err(count, argv[2]);
1821 count = BDRV_SECTOR_SIZE;
1827 ret = bdrv_is_allocated(bs, offset, remaining, &num);
1829 printf("is_allocated failed: %s\n", strerror(-ret));
1843 cvtstr(start, s1, sizeof(s1));
1845 printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
1846 sum_alloc, count, s1);
1850 static const cmdinfo_t alloc_cmd = {
1856 .args = "offset [count]",
1857 .oneline = "checks if offset is allocated in the file",
1861 static int map_is_allocated(BlockDriverState *bs, int64_t offset,
1862 int64_t bytes, int64_t *pnum)
1868 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
1869 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1877 while (bytes > 0 && ret == firstret) {
1881 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
1882 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1883 if (ret == firstret && num) {
1893 static int map_f(BlockBackend *blk, int argc, char **argv)
1895 int64_t offset, bytes;
1896 char s1[64], s2[64];
1902 bytes = blk_getlength(blk);
1904 error_report("Failed to query image length: %s", strerror(-bytes));
1909 ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
1911 error_report("Failed to get allocation status: %s", strerror(-ret));
1914 error_report("Unexpected end of image");
1918 retstr = ret ? " allocated" : "not allocated";
1919 cvtstr(num, s1, sizeof(s1));
1920 cvtstr(offset, s2, sizeof(s2));
1921 printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
1922 s1, num, retstr, s2, offset);
1931 static const cmdinfo_t map_cmd = {
1937 .oneline = "prints the allocated areas of a file",
1940 static void reopen_help(void)
1944 " Changes the open options of an already opened image\n"
1947 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
1949 " -r, -- Reopen the image read-only\n"
1950 " -w, -- Reopen the image read-write\n"
1951 " -c, -- Change the cache mode to the given value\n"
1952 " -o, -- Changes block driver options (cf. 'open' command)\n"
1956 static int reopen_f(BlockBackend *blk, int argc, char **argv);
1958 static QemuOptsList reopen_opts = {
1960 .merge_lists = true,
1961 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
1963 /* no elements => accept any params */
1964 { /* end of list */ }
1968 static const cmdinfo_t reopen_cmd = {
1973 .args = "[(-r|-w)] [-c cache] [-o options]",
1974 .oneline = "reopens an image with new options",
1975 .help = reopen_help,
1978 static int reopen_f(BlockBackend *blk, int argc, char **argv)
1980 BlockDriverState *bs = blk_bs(blk);
1984 int flags = bs->open_flags;
1985 bool writethrough = !blk_enable_write_cache(blk);
1986 bool has_rw_option = false;
1987 bool has_cache_option = false;
1989 BlockReopenQueue *brq;
1990 Error *local_err = NULL;
1992 while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
1995 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
1996 error_report("Invalid cache option: %s", optarg);
1999 has_cache_option = true;
2002 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
2003 qemu_opts_reset(&reopen_opts);
2008 if (has_rw_option) {
2009 error_report("Only one -r/-w option may be given");
2012 flags &= ~BDRV_O_RDWR;
2013 has_rw_option = true;
2016 if (has_rw_option) {
2017 error_report("Only one -r/-w option may be given");
2020 flags |= BDRV_O_RDWR;
2021 has_rw_option = true;
2024 qemu_opts_reset(&reopen_opts);
2025 qemuio_command_usage(&reopen_cmd);
2030 if (optind != argc) {
2031 qemu_opts_reset(&reopen_opts);
2032 qemuio_command_usage(&reopen_cmd);
2036 if (!writethrough != blk_enable_write_cache(blk) &&
2037 blk_get_attached_dev(blk))
2039 error_report("Cannot change cache.writeback: Device attached");
2040 qemu_opts_reset(&reopen_opts);
2044 if (!(flags & BDRV_O_RDWR)) {
2045 uint64_t orig_perm, orig_shared_perm;
2049 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
2051 orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
2056 qopts = qemu_opts_find(&reopen_opts, NULL);
2057 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new();
2058 qemu_opts_reset(&reopen_opts);
2060 if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) {
2061 if (has_rw_option) {
2062 error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'");
2063 qobject_unref(opts);
2067 qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR));
2070 if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) ||
2071 qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) {
2072 if (has_cache_option) {
2073 error_report("Cannot set both -c and the cache options");
2074 qobject_unref(opts);
2078 qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE);
2079 qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH);
2082 bdrv_subtree_drained_begin(bs);
2083 brq = bdrv_reopen_queue(NULL, bs, opts);
2084 bdrv_reopen_multiple(bdrv_get_aio_context(bs), brq, &local_err);
2085 bdrv_subtree_drained_end(bs);
2088 error_report_err(local_err);
2092 blk_set_enable_write_cache(blk, !writethrough);
2096 static int break_f(BlockBackend *blk, int argc, char **argv)
2100 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
2102 printf("Could not set breakpoint: %s\n", strerror(-ret));
2109 static int remove_break_f(BlockBackend *blk, int argc, char **argv)
2113 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
2115 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
2122 static const cmdinfo_t break_cmd = {
2127 .args = "event tag",
2128 .oneline = "sets a breakpoint on event and tags the stopped "
2132 static const cmdinfo_t remove_break_cmd = {
2133 .name = "remove_break",
2136 .cfunc = remove_break_f,
2138 .oneline = "remove a breakpoint by tag",
2141 static int resume_f(BlockBackend *blk, int argc, char **argv)
2145 ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
2147 printf("Could not resume request: %s\n", strerror(-ret));
2154 static const cmdinfo_t resume_cmd = {
2160 .oneline = "resumes the request tagged as tag",
2163 static int wait_break_f(BlockBackend *blk, int argc, char **argv)
2165 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
2166 aio_poll(blk_get_aio_context(blk), true);
2171 static const cmdinfo_t wait_break_cmd = {
2172 .name = "wait_break",
2175 .cfunc = wait_break_f,
2177 .oneline = "waits for the suspension of a request",
2180 static int abort_f(BlockBackend *blk, int argc, char **argv)
2185 static const cmdinfo_t abort_cmd = {
2188 .flags = CMD_NOFILE_OK,
2189 .oneline = "simulate a program crash using abort(3)",
2192 static void sigraise_help(void)
2196 " raises the given signal\n"
2199 " 'sigraise %i' - raises SIGTERM\n"
2201 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2202 " given to sigraise.\n"
2206 static int sigraise_f(BlockBackend *blk, int argc, char **argv);
2208 static const cmdinfo_t sigraise_cmd = {
2210 .cfunc = sigraise_f,
2213 .flags = CMD_NOFILE_OK,
2215 .oneline = "raises a signal",
2216 .help = sigraise_help,
2219 static int sigraise_f(BlockBackend *blk, int argc, char **argv)
2221 int64_t sig = cvtnum(argv[1]);
2223 print_cvtnum_err(sig, argv[1]);
2225 } else if (sig > NSIG) {
2226 printf("signal argument '%s' is too large to be a valid signal\n",
2231 /* Using raise() to kill this process does not necessarily flush all open
2232 * streams. At least stdout and stderr (although the latter should be
2233 * non-buffered anyway) should be flushed, though. */
2242 static void sleep_cb(void *opaque)
2244 bool *expired = opaque;
2248 static int sleep_f(BlockBackend *blk, int argc, char **argv)
2252 struct QEMUTimer *timer;
2253 bool expired = false;
2255 ms = strtol(argv[1], &endptr, 0);
2256 if (ms < 0 || *endptr != '\0') {
2257 printf("%s is not a valid number\n", argv[1]);
2261 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
2262 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);
2265 main_loop_wait(false);
2272 static const cmdinfo_t sleep_cmd = {
2277 .flags = CMD_NOFILE_OK,
2278 .oneline = "waits for the given value in milliseconds",
2281 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2286 printf("%s ", ct->name);
2288 printf("(or %s) ", ct->altname);
2293 printf("%s ", ct->args);
2295 printf("-- %s\n", ct->oneline);
2298 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2300 help_oneline(cmd, ct);
2306 static void help_all(void)
2308 const cmdinfo_t *ct;
2310 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2311 help_oneline(ct->name, ct);
2313 printf("\nUse 'help commandname' for extended help.\n");
2316 static int help_f(BlockBackend *blk, int argc, char **argv)
2318 const cmdinfo_t *ct;
2325 ct = find_command(argv[1]);
2327 printf("command %s not found\n", argv[1]);
2331 help_onecmd(argv[1], ct);
2335 static const cmdinfo_t help_cmd = {
2341 .flags = CMD_FLAG_GLOBAL,
2342 .args = "[command]",
2343 .oneline = "help for one or all commands",
2346 int qemuio_command(BlockBackend *blk, const char *cmd)
2350 const cmdinfo_t *ct;
2355 input = g_strdup(cmd);
2356 v = breakline(input, &c);
2358 ct = find_command(v[0]);
2360 ctx = blk ? blk_get_aio_context(blk) : qemu_get_aio_context();
2361 aio_context_acquire(ctx);
2362 ret = command(blk, ct, c, v);
2363 aio_context_release(ctx);
2365 fprintf(stderr, "command \"%s\" not found\n", v[0]);
2375 static void __attribute((constructor)) init_qemuio_commands(void)
2377 /* initialize commands */
2378 qemuio_add_command(&help_cmd);
2379 qemuio_add_command(&read_cmd);
2380 qemuio_add_command(&readv_cmd);
2381 qemuio_add_command(&write_cmd);
2382 qemuio_add_command(&writev_cmd);
2383 qemuio_add_command(&aio_read_cmd);
2384 qemuio_add_command(&aio_write_cmd);
2385 qemuio_add_command(&aio_flush_cmd);
2386 qemuio_add_command(&flush_cmd);
2387 qemuio_add_command(&truncate_cmd);
2388 qemuio_add_command(&length_cmd);
2389 qemuio_add_command(&info_cmd);
2390 qemuio_add_command(&discard_cmd);
2391 qemuio_add_command(&alloc_cmd);
2392 qemuio_add_command(&map_cmd);
2393 qemuio_add_command(&reopen_cmd);
2394 qemuio_add_command(&break_cmd);
2395 qemuio_add_command(&remove_break_cmd);
2396 qemuio_add_command(&resume_cmd);
2397 qemuio_add_command(&wait_break_cmd);
2398 qemuio_add_command(&abort_cmd);
2399 qemuio_add_command(&sleep_cmd);
2400 qemuio_add_command(&sigraise_cmd);