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)
546 if (bytes > INT_MAX) {
550 ret = blk_pread(blk, offset, bytes, (uint8_t *)buf, 0);
558 static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset,
559 int64_t bytes, int flags, int64_t *total)
563 if (bytes > INT_MAX) {
567 ret = blk_pwrite(blk, offset, bytes, (uint8_t *)buf, flags);
585 static void coroutine_fn co_pwrite_zeroes_entry(void *opaque)
587 CoWriteZeroes *data = opaque;
589 data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes,
593 *data->total = data->ret;
597 *data->total = data->bytes;
600 static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset,
601 int64_t bytes, int flags, int64_t *total)
604 CoWriteZeroes data = {
613 co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data);
614 bdrv_coroutine_enter(blk_bs(blk), co);
616 aio_poll(blk_get_aio_context(blk), true);
625 static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset,
626 int64_t bytes, int64_t *total)
630 if (bytes > BDRV_REQUEST_MAX_BYTES) {
634 ret = blk_pwrite_compressed(blk, offset, bytes, buf);
642 static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset,
643 int64_t count, int64_t *total)
645 if (count > INT_MAX) {
649 *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count);
656 static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset,
657 int64_t count, int64_t *total)
659 if (count > INT_MAX) {
663 *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count);
670 #define NOT_DONE 0x7fffffff
671 static void aio_rw_done(void *opaque, int ret)
673 *(int *)opaque = ret;
676 static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov,
677 int64_t offset, int *total)
679 int async_ret = NOT_DONE;
681 blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret);
682 while (async_ret == NOT_DONE) {
683 main_loop_wait(false);
687 return async_ret < 0 ? async_ret : 1;
690 static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov,
691 int64_t offset, int flags, int *total)
693 int async_ret = NOT_DONE;
695 blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret);
696 while (async_ret == NOT_DONE) {
697 main_loop_wait(false);
701 return async_ret < 0 ? async_ret : 1;
704 static void read_help(void)
708 " reads a range of bytes from the given offset\n"
711 " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n"
713 " Reads a segment of the currently open file, optionally dumping it to the\n"
714 " standard output stream (with -v option) for subsequent inspection.\n"
715 " -b, -- read from the VM state rather than the virtual disk\n"
716 " -C, -- report statistics in a machine parsable format\n"
717 " -l, -- length for pattern verification (only with -P)\n"
718 " -p, -- ignored for backwards compatibility\n"
719 " -P, -- use a pattern to verify read data\n"
720 " -q, -- quiet mode, do not show I/O statistics\n"
721 " -s, -- start offset for pattern verification (only with -P)\n"
722 " -v, -- dump buffer to standard output\n"
726 static int read_f(BlockBackend *blk, int argc, char **argv);
728 static const cmdinfo_t read_cmd = {
734 .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len",
735 .oneline = "reads a number of bytes at a specified offset",
739 static int read_f(BlockBackend *blk, int argc, char **argv)
741 struct timespec t1, t2;
742 bool Cflag = false, qflag = false, vflag = false;
743 bool Pflag = false, sflag = false, lflag = false, bflag = false;
748 /* Some compilers get confused and warn if this is not initialized. */
751 int64_t pattern_offset = 0, pattern_count = 0;
753 while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) {
763 pattern_count = cvtnum(optarg);
764 if (pattern_count < 0) {
765 print_cvtnum_err(pattern_count, optarg);
766 return pattern_count;
770 /* Ignored for backwards compatibility */
774 pattern = parse_pattern(optarg);
784 pattern_offset = cvtnum(optarg);
785 if (pattern_offset < 0) {
786 print_cvtnum_err(pattern_offset, optarg);
787 return pattern_offset;
794 qemuio_command_usage(&read_cmd);
799 if (optind != argc - 2) {
800 qemuio_command_usage(&read_cmd);
804 offset = cvtnum(argv[optind]);
806 print_cvtnum_err(offset, argv[optind]);
811 count = cvtnum(argv[optind]);
813 print_cvtnum_err(count, argv[optind]);
815 } else if (count > BDRV_REQUEST_MAX_BYTES) {
816 printf("length cannot exceed %" PRIu64 ", given %s\n",
817 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
821 if (!Pflag && (lflag || sflag)) {
822 qemuio_command_usage(&read_cmd);
827 pattern_count = count - pattern_offset;
830 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
831 printf("pattern verification range exceeds end of read data\n");
836 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
837 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
841 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
842 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
848 buf = qemu_io_alloc(blk, count, 0xab);
850 clock_gettime(CLOCK_MONOTONIC, &t1);
852 ret = do_load_vmstate(blk, buf, offset, count, &total);
854 ret = do_pread(blk, buf, offset, count, &total);
856 clock_gettime(CLOCK_MONOTONIC, &t2);
859 printf("read failed: %s\n", strerror(-ret));
867 void *cmp_buf = g_malloc(pattern_count);
868 memset(cmp_buf, pattern, pattern_count);
869 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
870 printf("Pattern verification failed at offset %"
871 PRId64 ", %"PRId64" bytes\n",
872 offset + pattern_offset, pattern_count);
883 dump_buffer(buf, offset, count);
886 /* Finally, report back -- -C gives a parsable format */
888 print_report("read", &t2, offset, count, total, cnt, Cflag);
895 static void readv_help(void)
899 " reads a range of bytes from the given offset into multiple buffers\n"
902 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
904 " Reads a segment of the currently open file, optionally dumping it to the\n"
905 " standard output stream (with -v option) for subsequent inspection.\n"
906 " Uses multiple iovec buffers if more than one byte range is specified.\n"
907 " -C, -- report statistics in a machine parsable format\n"
908 " -P, -- use a pattern to verify read data\n"
909 " -v, -- dump buffer to standard output\n"
910 " -q, -- quiet mode, do not show I/O statistics\n"
914 static int readv_f(BlockBackend *blk, int argc, char **argv);
916 static const cmdinfo_t readv_cmd = {
921 .args = "[-Cqv] [-P pattern] off len [len..]",
922 .oneline = "reads a number of bytes at a specified offset",
926 static int readv_f(BlockBackend *blk, int argc, char **argv)
928 struct timespec t1, t2;
929 bool Cflag = false, qflag = false, vflag = false;
933 /* Some compilers get confused and warn if this is not initialized. */
940 while ((c = getopt(argc, argv, "CP:qv")) != -1) {
947 pattern = parse_pattern(optarg);
959 qemuio_command_usage(&readv_cmd);
964 if (optind > argc - 2) {
965 qemuio_command_usage(&readv_cmd);
970 offset = cvtnum(argv[optind]);
972 print_cvtnum_err(offset, argv[optind]);
977 nr_iov = argc - optind;
978 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
983 clock_gettime(CLOCK_MONOTONIC, &t1);
984 ret = do_aio_readv(blk, &qiov, offset, &total);
985 clock_gettime(CLOCK_MONOTONIC, &t2);
988 printf("readv failed: %s\n", strerror(-ret));
996 void *cmp_buf = g_malloc(qiov.size);
997 memset(cmp_buf, pattern, qiov.size);
998 if (memcmp(buf, cmp_buf, qiov.size)) {
999 printf("Pattern verification failed at offset %"
1000 PRId64 ", %zu bytes\n", offset, qiov.size);
1011 dump_buffer(buf, offset, qiov.size);
1014 /* Finally, report back -- -C gives a parsable format */
1016 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
1019 qemu_iovec_destroy(&qiov);
1024 static void write_help(void)
1028 " writes a range of bytes from the given offset\n"
1031 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
1033 " Writes into a segment of the currently open file, using a buffer\n"
1034 " filled with a set pattern (0xcdcdcdcd).\n"
1035 " -b, -- write to the VM state rather than the virtual disk\n"
1036 " -c, -- write compressed data with blk_write_compressed\n"
1037 " -f, -- use Force Unit Access semantics\n"
1038 " -n, -- with -z, don't allow slow fallback\n"
1039 " -p, -- ignored for backwards compatibility\n"
1040 " -P, -- use different pattern to fill file\n"
1041 " -s, -- use a pattern file to fill the write buffer\n"
1042 " -C, -- report statistics in a machine parsable format\n"
1043 " -q, -- quiet mode, do not show I/O statistics\n"
1044 " -u, -- with -z, allow unmapping\n"
1045 " -z, -- write zeroes using blk_co_pwrite_zeroes\n"
1049 static int write_f(BlockBackend *blk, int argc, char **argv);
1051 static const cmdinfo_t write_cmd = {
1055 .perm = BLK_PERM_WRITE,
1058 .args = "[-bcCfnquz] [-P pattern | -s source_file] off len",
1059 .oneline = "writes a number of bytes at a specified offset",
1063 static int write_f(BlockBackend *blk, int argc, char **argv)
1065 struct timespec t1, t2;
1066 bool Cflag = false, qflag = false, bflag = false;
1067 bool Pflag = false, zflag = false, cflag = false, sflag = false;
1073 /* Some compilers get confused and warn if this is not initialized. */
1076 const char *file_name = NULL;
1078 while ((c = getopt(argc, argv, "bcCfnpP:qs:uz")) != -1) {
1090 flags |= BDRV_REQ_FUA;
1093 flags |= BDRV_REQ_NO_FALLBACK;
1096 /* Ignored for backwards compatibility */
1100 pattern = parse_pattern(optarg);
1113 flags |= BDRV_REQ_MAY_UNMAP;
1119 qemuio_command_usage(&write_cmd);
1124 if (optind != argc - 2) {
1125 qemuio_command_usage(&write_cmd);
1129 if (bflag && zflag) {
1130 printf("-b and -z cannot be specified at the same time\n");
1134 if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
1135 printf("-f and -b or -c cannot be specified at the same time\n");
1139 if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) {
1140 printf("-n requires -z to be specified\n");
1144 if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
1145 printf("-u requires -z to be specified\n");
1149 if (zflag + Pflag + sflag > 1) {
1150 printf("Only one of -z, -P, and -s "
1151 "can be specified at the same time\n");
1155 offset = cvtnum(argv[optind]);
1157 print_cvtnum_err(offset, argv[optind]);
1162 count = cvtnum(argv[optind]);
1164 print_cvtnum_err(count, argv[optind]);
1166 } else if (count > BDRV_REQUEST_MAX_BYTES &&
1167 !(flags & BDRV_REQ_NO_FALLBACK)) {
1168 printf("length cannot exceed %" PRIu64 " without -n, given %s\n",
1169 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1173 if (bflag || cflag) {
1174 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
1175 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
1180 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
1181 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
1189 buf = qemu_io_alloc_from_file(blk, count, file_name);
1194 buf = qemu_io_alloc(blk, count, pattern);
1198 clock_gettime(CLOCK_MONOTONIC, &t1);
1200 ret = do_save_vmstate(blk, buf, offset, count, &total);
1202 ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
1204 ret = do_write_compressed(blk, buf, offset, count, &total);
1206 ret = do_pwrite(blk, buf, offset, count, flags, &total);
1208 clock_gettime(CLOCK_MONOTONIC, &t2);
1211 printf("write failed: %s\n", strerror(-ret));
1222 /* Finally, report back -- -C gives a parsable format */
1224 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1238 " writes a range of bytes from the given offset source from multiple buffers\n"
1241 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1243 " Writes into a segment of the currently open file, using a buffer\n"
1244 " filled with a set pattern (0xcdcdcdcd).\n"
1245 " -P, -- use different pattern to fill file\n"
1246 " -C, -- report statistics in a machine parsable format\n"
1247 " -f, -- use Force Unit Access semantics\n"
1248 " -q, -- quiet mode, do not show I/O statistics\n"
1252 static int writev_f(BlockBackend *blk, int argc, char **argv);
1254 static const cmdinfo_t writev_cmd = {
1257 .perm = BLK_PERM_WRITE,
1260 .args = "[-Cfq] [-P pattern] off len [len..]",
1261 .oneline = "writes a number of bytes at a specified offset",
1262 .help = writev_help,
1265 static int writev_f(BlockBackend *blk, int argc, char **argv)
1267 struct timespec t1, t2;
1268 bool Cflag = false, qflag = false;
1273 /* Some compilers get confused and warn if this is not initialized. */
1279 while ((c = getopt(argc, argv, "CfqP:")) != -1) {
1285 flags |= BDRV_REQ_FUA;
1291 pattern = parse_pattern(optarg);
1297 qemuio_command_usage(&writev_cmd);
1302 if (optind > argc - 2) {
1303 qemuio_command_usage(&writev_cmd);
1307 offset = cvtnum(argv[optind]);
1309 print_cvtnum_err(offset, argv[optind]);
1314 nr_iov = argc - optind;
1315 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
1320 clock_gettime(CLOCK_MONOTONIC, &t1);
1321 ret = do_aio_writev(blk, &qiov, offset, flags, &total);
1322 clock_gettime(CLOCK_MONOTONIC, &t2);
1325 printf("writev failed: %s\n", strerror(-ret));
1336 /* Finally, report back -- -C gives a parsable format */
1338 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1340 qemu_iovec_destroy(&qiov);
1355 BlockAcctCookie acct;
1360 static void aio_write_done(void *opaque, int ret)
1362 struct aio_ctx *ctx = opaque;
1365 clock_gettime(CLOCK_MONOTONIC, &t2);
1369 printf("aio_write failed: %s\n", strerror(-ret));
1370 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1374 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1380 /* Finally, report back -- -C gives a parsable format */
1381 t2 = tsub(t2, ctx->t1);
1382 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1383 ctx->qiov.size, 1, ctx->Cflag);
1386 qemu_io_free(ctx->buf);
1387 qemu_iovec_destroy(&ctx->qiov);
1392 static void aio_read_done(void *opaque, int ret)
1394 struct aio_ctx *ctx = opaque;
1397 clock_gettime(CLOCK_MONOTONIC, &t2);
1400 printf("readv failed: %s\n", strerror(-ret));
1401 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1406 void *cmp_buf = g_malloc(ctx->qiov.size);
1408 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1409 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1410 printf("Pattern verification failed at offset %"
1411 PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size);
1416 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1423 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1426 /* Finally, report back -- -C gives a parsable format */
1427 t2 = tsub(t2, ctx->t1);
1428 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1429 ctx->qiov.size, 1, ctx->Cflag);
1431 qemu_io_free(ctx->buf);
1432 qemu_iovec_destroy(&ctx->qiov);
1436 static void aio_read_help(void)
1440 " asynchronously reads a range of bytes from the given offset\n"
1443 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1445 " Reads a segment of the currently open file, optionally dumping it to the\n"
1446 " standard output stream (with -v option) for subsequent inspection.\n"
1447 " The read is performed asynchronously and the aio_flush command must be\n"
1448 " used to ensure all outstanding aio requests have been completed.\n"
1449 " Note that due to its asynchronous nature, this command will be\n"
1450 " considered successful once the request is submitted, independently\n"
1451 " of potential I/O errors or pattern mismatches.\n"
1452 " -C, -- report statistics in a machine parsable format\n"
1453 " -P, -- use a pattern to verify read data\n"
1454 " -i, -- treat request as invalid, for exercising stats\n"
1455 " -v, -- dump buffer to standard output\n"
1456 " -q, -- quiet mode, do not show I/O statistics\n"
1460 static int aio_read_f(BlockBackend *blk, int argc, char **argv);
1462 static const cmdinfo_t aio_read_cmd = {
1464 .cfunc = aio_read_f,
1467 .args = "[-Ciqv] [-P pattern] off len [len..]",
1468 .oneline = "asynchronously reads a number of bytes",
1469 .help = aio_read_help,
1472 static int aio_read_f(BlockBackend *blk, int argc, char **argv)
1475 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1478 while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
1485 ctx->pattern = parse_pattern(optarg);
1486 if (ctx->pattern < 0) {
1492 printf("injecting invalid read request\n");
1493 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1504 qemuio_command_usage(&aio_read_cmd);
1509 if (optind > argc - 2) {
1511 qemuio_command_usage(&aio_read_cmd);
1515 ctx->offset = cvtnum(argv[optind]);
1516 if (ctx->offset < 0) {
1517 int ret = ctx->offset;
1518 print_cvtnum_err(ret, argv[optind]);
1524 nr_iov = argc - optind;
1525 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1526 if (ctx->buf == NULL) {
1527 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1532 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1533 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1535 blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx);
1539 static void aio_write_help(void)
1543 " asynchronously writes a range of bytes from the given offset source\n"
1544 " from multiple buffers\n"
1547 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1549 " Writes into a segment of the currently open file, using a buffer\n"
1550 " filled with a set pattern (0xcdcdcdcd).\n"
1551 " The write is performed asynchronously and the aio_flush command must be\n"
1552 " used to ensure all outstanding aio requests have been completed.\n"
1553 " Note that due to its asynchronous nature, this command will be\n"
1554 " considered successful once the request is submitted, independently\n"
1555 " of potential I/O errors or pattern mismatches.\n"
1556 " -P, -- use different pattern to fill file\n"
1557 " -C, -- report statistics in a machine parsable format\n"
1558 " -f, -- use Force Unit Access semantics\n"
1559 " -i, -- treat request as invalid, for exercising stats\n"
1560 " -q, -- quiet mode, do not show I/O statistics\n"
1561 " -u, -- with -z, allow unmapping\n"
1562 " -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
1566 static int aio_write_f(BlockBackend *blk, int argc, char **argv);
1568 static const cmdinfo_t aio_write_cmd = {
1569 .name = "aio_write",
1570 .cfunc = aio_write_f,
1571 .perm = BLK_PERM_WRITE,
1574 .args = "[-Cfiquz] [-P pattern] off len [len..]",
1575 .oneline = "asynchronously writes a number of bytes",
1576 .help = aio_write_help,
1579 static int aio_write_f(BlockBackend *blk, int argc, char **argv)
1583 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1587 while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
1593 flags |= BDRV_REQ_FUA;
1599 flags |= BDRV_REQ_MAY_UNMAP;
1602 pattern = parse_pattern(optarg);
1609 printf("injecting invalid write request\n");
1610 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1618 qemuio_command_usage(&aio_write_cmd);
1623 if (optind > argc - 2) {
1625 qemuio_command_usage(&aio_write_cmd);
1629 if (ctx->zflag && optind != argc - 2) {
1630 printf("-z supports only a single length parameter\n");
1635 if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
1636 printf("-u requires -z to be specified\n");
1641 if (ctx->zflag && ctx->Pflag) {
1642 printf("-z and -P cannot be specified at the same time\n");
1647 ctx->offset = cvtnum(argv[optind]);
1648 if (ctx->offset < 0) {
1649 int ret = ctx->offset;
1650 print_cvtnum_err(ret, argv[optind]);
1657 int64_t count = cvtnum(argv[optind]);
1659 print_cvtnum_err(count, argv[optind]);
1664 ctx->qiov.size = count;
1665 blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
1668 nr_iov = argc - optind;
1669 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
1671 if (ctx->buf == NULL) {
1672 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1677 clock_gettime(CLOCK_MONOTONIC, &ctx->t1);
1678 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1681 blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
1688 static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
1690 BlockAcctCookie cookie;
1691 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
1693 block_acct_done(blk_get_stats(blk), &cookie);
1697 static const cmdinfo_t aio_flush_cmd = {
1698 .name = "aio_flush",
1699 .cfunc = aio_flush_f,
1700 .oneline = "completes all outstanding aio requests"
1703 static int flush_f(BlockBackend *blk, int argc, char **argv)
1705 return blk_flush(blk);
1708 static const cmdinfo_t flush_cmd = {
1712 .oneline = "flush all in-core file state to disk",
1715 static int truncate_f(BlockBackend *blk, int argc, char **argv);
1716 static const cmdinfo_t truncate_cmd = {
1719 .cfunc = truncate_f,
1720 .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
1723 .args = "[-m prealloc_mode] off",
1724 .oneline = "truncates the current file at the given offset",
1727 static int truncate_f(BlockBackend *blk, int argc, char **argv)
1729 Error *local_err = NULL;
1732 PreallocMode prealloc = PREALLOC_MODE_OFF;
1734 while ((c = getopt(argc, argv, "m:")) != -1) {
1737 prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg,
1738 PREALLOC_MODE__MAX, NULL);
1739 if (prealloc == PREALLOC_MODE__MAX) {
1740 error_report("Invalid preallocation mode '%s'", optarg);
1745 qemuio_command_usage(&truncate_cmd);
1750 offset = cvtnum(argv[optind]);
1752 print_cvtnum_err(offset, argv[1]);
1757 * qemu-io is a debugging tool, so let us be strict here and pass
1758 * exact=true. It is better to err on the "emit more errors" side
1759 * than to be overly permissive.
1761 ret = blk_truncate(blk, offset, false, prealloc, 0, &local_err);
1763 error_report_err(local_err);
1770 static int length_f(BlockBackend *blk, int argc, char **argv)
1775 size = blk_getlength(blk);
1777 printf("getlength: %s\n", strerror(-size));
1781 cvtstr(size, s1, sizeof(s1));
1787 static const cmdinfo_t length_cmd = {
1791 .oneline = "gets the length of the current file",
1795 static int info_f(BlockBackend *blk, int argc, char **argv)
1797 BlockDriverState *bs = blk_bs(blk);
1798 BlockDriverInfo bdi;
1799 ImageInfoSpecific *spec_info;
1800 Error *local_err = NULL;
1801 char s1[64], s2[64];
1804 if (bs->drv && bs->drv->format_name) {
1805 printf("format name: %s\n", bs->drv->format_name);
1807 if (bs->drv && bs->drv->protocol_name) {
1808 printf("format name: %s\n", bs->drv->protocol_name);
1811 ret = bdrv_get_info(bs, &bdi);
1816 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1817 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1819 printf("cluster size: %s\n", s1);
1820 printf("vm state offset: %s\n", s2);
1822 spec_info = bdrv_get_specific_info(bs, &local_err);
1824 error_report_err(local_err);
1828 printf("Format specific information:\n");
1829 bdrv_image_info_specific_dump(spec_info);
1830 qapi_free_ImageInfoSpecific(spec_info);
1838 static const cmdinfo_t info_cmd = {
1842 .oneline = "prints information about the current file",
1845 static void discard_help(void)
1849 " discards a range of bytes from the given offset\n"
1852 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1854 " Discards a segment of the currently open file.\n"
1855 " -C, -- report statistics in a machine parsable format\n"
1856 " -q, -- quiet mode, do not show I/O statistics\n"
1860 static int discard_f(BlockBackend *blk, int argc, char **argv);
1862 static const cmdinfo_t discard_cmd = {
1866 .perm = BLK_PERM_WRITE,
1869 .args = "[-Cq] off len",
1870 .oneline = "discards a number of bytes at a specified offset",
1871 .help = discard_help,
1874 static int discard_f(BlockBackend *blk, int argc, char **argv)
1876 struct timespec t1, t2;
1877 bool Cflag = false, qflag = false;
1879 int64_t offset, bytes;
1881 while ((c = getopt(argc, argv, "Cq")) != -1) {
1890 qemuio_command_usage(&discard_cmd);
1895 if (optind != argc - 2) {
1896 qemuio_command_usage(&discard_cmd);
1900 offset = cvtnum(argv[optind]);
1902 print_cvtnum_err(offset, argv[optind]);
1907 bytes = cvtnum(argv[optind]);
1909 print_cvtnum_err(bytes, argv[optind]);
1911 } else if (bytes > BDRV_REQUEST_MAX_BYTES) {
1912 printf("length cannot exceed %"PRIu64", given %s\n",
1913 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1917 clock_gettime(CLOCK_MONOTONIC, &t1);
1918 ret = blk_pdiscard(blk, offset, bytes);
1919 clock_gettime(CLOCK_MONOTONIC, &t2);
1922 printf("discard failed: %s\n", strerror(-ret));
1926 /* Finally, report back -- -C gives a parsable format */
1929 print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
1935 static int alloc_f(BlockBackend *blk, int argc, char **argv)
1937 BlockDriverState *bs = blk_bs(blk);
1938 int64_t offset, start, remaining, count;
1941 int64_t num, sum_alloc;
1943 start = offset = cvtnum(argv[1]);
1945 print_cvtnum_err(offset, argv[1]);
1950 count = cvtnum(argv[2]);
1952 print_cvtnum_err(count, argv[2]);
1956 count = BDRV_SECTOR_SIZE;
1962 ret = bdrv_is_allocated(bs, offset, remaining, &num);
1964 printf("is_allocated failed: %s\n", strerror(-ret));
1978 cvtstr(start, s1, sizeof(s1));
1980 printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
1981 sum_alloc, count, s1);
1985 static const cmdinfo_t alloc_cmd = {
1991 .args = "offset [count]",
1992 .oneline = "checks if offset is allocated in the file",
1996 static int map_is_allocated(BlockDriverState *bs, int64_t offset,
1997 int64_t bytes, int64_t *pnum)
2002 ret = bdrv_is_allocated(bs, offset, bytes, &num);
2010 while (bytes > 0 && ret == firstret) {
2014 ret = bdrv_is_allocated(bs, offset, bytes, &num);
2015 if (ret == firstret && num) {
2025 static int map_f(BlockBackend *blk, int argc, char **argv)
2027 int64_t offset, bytes;
2028 char s1[64], s2[64];
2034 bytes = blk_getlength(blk);
2036 error_report("Failed to query image length: %s", strerror(-bytes));
2041 ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
2043 error_report("Failed to get allocation status: %s", strerror(-ret));
2046 error_report("Unexpected end of image");
2050 retstr = ret ? " allocated" : "not allocated";
2051 cvtstr(num, s1, sizeof(s1));
2052 cvtstr(offset, s2, sizeof(s2));
2053 printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
2054 s1, num, retstr, s2, offset);
2063 static const cmdinfo_t map_cmd = {
2069 .oneline = "prints the allocated areas of a file",
2072 static void reopen_help(void)
2076 " Changes the open options of an already opened image\n"
2079 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
2081 " -r, -- Reopen the image read-only\n"
2082 " -w, -- Reopen the image read-write\n"
2083 " -c, -- Change the cache mode to the given value\n"
2084 " -o, -- Changes block driver options (cf. 'open' command)\n"
2088 static int reopen_f(BlockBackend *blk, int argc, char **argv);
2090 static QemuOptsList reopen_opts = {
2092 .merge_lists = true,
2093 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
2095 /* no elements => accept any params */
2096 { /* end of list */ }
2100 static const cmdinfo_t reopen_cmd = {
2105 .args = "[(-r|-w)] [-c cache] [-o options]",
2106 .oneline = "reopens an image with new options",
2107 .help = reopen_help,
2110 static int reopen_f(BlockBackend *blk, int argc, char **argv)
2112 BlockDriverState *bs = blk_bs(blk);
2116 int flags = bs->open_flags;
2117 bool writethrough = !blk_enable_write_cache(blk);
2118 bool has_rw_option = false;
2119 bool has_cache_option = false;
2120 Error *local_err = NULL;
2122 while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
2125 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
2126 error_report("Invalid cache option: %s", optarg);
2129 has_cache_option = true;
2132 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
2133 qemu_opts_reset(&reopen_opts);
2138 if (has_rw_option) {
2139 error_report("Only one -r/-w option may be given");
2142 flags &= ~BDRV_O_RDWR;
2143 has_rw_option = true;
2146 if (has_rw_option) {
2147 error_report("Only one -r/-w option may be given");
2150 flags |= BDRV_O_RDWR;
2151 has_rw_option = true;
2154 qemu_opts_reset(&reopen_opts);
2155 qemuio_command_usage(&reopen_cmd);
2160 if (optind != argc) {
2161 qemu_opts_reset(&reopen_opts);
2162 qemuio_command_usage(&reopen_cmd);
2166 if (!writethrough != blk_enable_write_cache(blk) &&
2167 blk_get_attached_dev(blk))
2169 error_report("Cannot change cache.writeback: Device attached");
2170 qemu_opts_reset(&reopen_opts);
2174 if (!(flags & BDRV_O_RDWR)) {
2175 uint64_t orig_perm, orig_shared_perm;
2179 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
2181 orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
2186 qopts = qemu_opts_find(&reopen_opts, NULL);
2187 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new();
2188 qemu_opts_reset(&reopen_opts);
2190 if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) {
2191 if (has_rw_option) {
2192 error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'");
2193 qobject_unref(opts);
2197 qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR));
2200 if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) ||
2201 qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) {
2202 if (has_cache_option) {
2203 error_report("Cannot set both -c and the cache options");
2204 qobject_unref(opts);
2208 qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE);
2209 qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH);
2212 bdrv_reopen(bs, opts, true, &local_err);
2215 error_report_err(local_err);
2219 blk_set_enable_write_cache(blk, !writethrough);
2223 static int break_f(BlockBackend *blk, int argc, char **argv)
2227 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
2229 printf("Could not set breakpoint: %s\n", strerror(-ret));
2236 static int remove_break_f(BlockBackend *blk, int argc, char **argv)
2240 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
2242 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
2249 static const cmdinfo_t break_cmd = {
2254 .args = "event tag",
2255 .oneline = "sets a breakpoint on event and tags the stopped "
2259 static const cmdinfo_t remove_break_cmd = {
2260 .name = "remove_break",
2263 .cfunc = remove_break_f,
2265 .oneline = "remove a breakpoint by tag",
2268 static int resume_f(BlockBackend *blk, int argc, char **argv)
2272 ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
2274 printf("Could not resume request: %s\n", strerror(-ret));
2281 static const cmdinfo_t resume_cmd = {
2287 .oneline = "resumes the request tagged as tag",
2290 static int wait_break_f(BlockBackend *blk, int argc, char **argv)
2292 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
2293 aio_poll(blk_get_aio_context(blk), true);
2298 static const cmdinfo_t wait_break_cmd = {
2299 .name = "wait_break",
2302 .cfunc = wait_break_f,
2304 .oneline = "waits for the suspension of a request",
2307 static int abort_f(BlockBackend *blk, int argc, char **argv)
2312 static const cmdinfo_t abort_cmd = {
2315 .flags = CMD_NOFILE_OK,
2316 .oneline = "simulate a program crash using abort(3)",
2319 static void sigraise_help(void)
2323 " raises the given signal\n"
2326 " 'sigraise %i' - raises SIGTERM\n"
2328 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2329 " given to sigraise.\n"
2333 static int sigraise_f(BlockBackend *blk, int argc, char **argv);
2335 static const cmdinfo_t sigraise_cmd = {
2337 .cfunc = sigraise_f,
2340 .flags = CMD_NOFILE_OK,
2342 .oneline = "raises a signal",
2343 .help = sigraise_help,
2346 static int sigraise_f(BlockBackend *blk, int argc, char **argv)
2348 int64_t sig = cvtnum(argv[1]);
2350 print_cvtnum_err(sig, argv[1]);
2352 } else if (sig > NSIG) {
2353 printf("signal argument '%s' is too large to be a valid signal\n",
2358 /* Using raise() to kill this process does not necessarily flush all open
2359 * streams. At least stdout and stderr (although the latter should be
2360 * non-buffered anyway) should be flushed, though. */
2369 static void sleep_cb(void *opaque)
2371 bool *expired = opaque;
2375 static int sleep_f(BlockBackend *blk, int argc, char **argv)
2379 struct QEMUTimer *timer;
2380 bool expired = false;
2382 ms = strtol(argv[1], &endptr, 0);
2383 if (ms < 0 || *endptr != '\0') {
2384 printf("%s is not a valid number\n", argv[1]);
2388 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
2389 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);
2392 main_loop_wait(false);
2399 static const cmdinfo_t sleep_cmd = {
2404 .flags = CMD_NOFILE_OK,
2405 .oneline = "waits for the given value in milliseconds",
2408 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2413 printf("%s ", ct->args);
2415 printf("-- %s\n", ct->oneline);
2418 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2420 help_oneline(cmd, ct);
2426 static void help_all(void)
2428 const cmdinfo_t *ct;
2430 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2431 help_oneline(ct->name, ct);
2433 printf("\nUse 'help commandname' for extended help.\n");
2436 static int help_f(BlockBackend *blk, int argc, char **argv)
2438 const cmdinfo_t *ct;
2445 ct = find_command(argv[1]);
2447 printf("command %s not found\n", argv[1]);
2451 help_onecmd(argv[1], ct);
2455 static const cmdinfo_t help_cmd = {
2461 .flags = CMD_FLAG_GLOBAL,
2462 .args = "[command]",
2463 .oneline = "help for one or all commands",
2467 * Called with aio context of blk acquired. Or with qemu_get_aio_context()
2468 * context acquired if blk is NULL.
2470 int qemuio_command(BlockBackend *blk, const char *cmd)
2473 const cmdinfo_t *ct;
2478 input = g_strdup(cmd);
2479 v = breakline(input, &c);
2481 ct = find_command(v[0]);
2483 ret = command(blk, ct, c, v);
2485 fprintf(stderr, "command \"%s\" not found\n", v[0]);
2495 static void __attribute((constructor)) init_qemuio_commands(void)
2497 /* initialize commands */
2498 qemuio_add_command(&help_cmd);
2499 qemuio_add_command(&read_cmd);
2500 qemuio_add_command(&readv_cmd);
2501 qemuio_add_command(&write_cmd);
2502 qemuio_add_command(&writev_cmd);
2503 qemuio_add_command(&aio_read_cmd);
2504 qemuio_add_command(&aio_write_cmd);
2505 qemuio_add_command(&aio_flush_cmd);
2506 qemuio_add_command(&flush_cmd);
2507 qemuio_add_command(&truncate_cmd);
2508 qemuio_add_command(&length_cmd);
2509 qemuio_add_command(&info_cmd);
2510 qemuio_add_command(&discard_cmd);
2511 qemuio_add_command(&alloc_cmd);
2512 qemuio_add_command(&map_cmd);
2513 qemuio_add_command(&reopen_cmd);
2514 qemuio_add_command(&break_cmd);
2515 qemuio_add_command(&remove_break_cmd);
2516 qemuio_add_command(&resume_cmd);
2517 qemuio_add_command(&wait_break_cmd);
2518 qemuio_add_command(&abort_cmd);
2519 qemuio_add_command(&sleep_cmd);
2520 qemuio_add_command(&sigraise_cmd);