2 * Command line utility to exercise the QEMU I/O path.
4 * Copyright (C) 2009-2016 Red Hat, Inc.
5 * Copyright (c) 2003-2005 Silicon Graphics, Inc.
7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
8 * See the COPYING file in the top-level directory.
11 #include "qemu/osdep.h"
12 #include "qapi/error.h"
14 #include "sysemu/block-backend.h"
15 #include "block/block.h"
16 #include "block/block_int.h" /* for info_f() */
17 #include "block/qapi.h"
18 #include "qemu/error-report.h"
19 #include "qemu/main-loop.h"
20 #include "qemu/option.h"
21 #include "qemu/timer.h"
22 #include "qemu/cutils.h"
24 #define CMD_NOFILE_OK 0x01
28 static cmdinfo_t *cmdtab;
31 static int compare_cmdname(const void *a, const void *b)
33 return strcmp(((const cmdinfo_t *)a)->name,
34 ((const cmdinfo_t *)b)->name);
37 void qemuio_add_command(const cmdinfo_t *ci)
39 /* ci->perm assumes a file is open, but the GLOBAL and NOFILE_OK
40 * flags allow it not to be, so that combination is invalid.
41 * Catch it now rather than letting it manifest as a crash if a
42 * particular set of command line options are used.
44 assert(ci->perm == 0 ||
45 (ci->flags & (CMD_FLAG_GLOBAL | CMD_NOFILE_OK)) == 0);
46 cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds);
47 cmdtab[ncmds - 1] = *ci;
48 qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname);
51 int qemuio_command_usage(const cmdinfo_t *ci)
53 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);
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);
705 return qemuio_command_usage(&read_cmd);
709 if (optind != argc - 2) {
710 return qemuio_command_usage(&read_cmd);
713 offset = cvtnum(argv[optind]);
715 print_cvtnum_err(offset, argv[optind]);
720 count = cvtnum(argv[optind]);
722 print_cvtnum_err(count, argv[optind]);
724 } else if (count > BDRV_REQUEST_MAX_BYTES) {
725 printf("length cannot exceed %" PRIu64 ", given %s\n",
726 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
730 if (!Pflag && (lflag || sflag)) {
731 return qemuio_command_usage(&read_cmd);
735 pattern_count = count - pattern_offset;
738 if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) {
739 printf("pattern verification range exceeds end of read data\n");
744 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
745 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
749 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
750 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
756 buf = qemu_io_alloc(blk, count, 0xab);
758 gettimeofday(&t1, NULL);
760 cnt = do_load_vmstate(blk, buf, offset, count, &total);
762 cnt = do_pread(blk, buf, offset, count, &total);
764 gettimeofday(&t2, NULL);
767 printf("read failed: %s\n", strerror(-cnt));
772 void *cmp_buf = g_malloc(pattern_count);
773 memset(cmp_buf, pattern, pattern_count);
774 if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) {
775 printf("Pattern verification failed at offset %"
776 PRId64 ", %"PRId64" bytes\n",
777 offset + pattern_offset, pattern_count);
787 dump_buffer(buf, offset, count);
790 /* Finally, report back -- -C gives a parsable format */
792 print_report("read", &t2, offset, count, total, cnt, Cflag);
800 static void readv_help(void)
804 " reads a range of bytes from the given offset into multiple buffers\n"
807 " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
809 " Reads a segment of the currently open file, optionally dumping it to the\n"
810 " standard output stream (with -v option) for subsequent inspection.\n"
811 " Uses multiple iovec buffers if more than one byte range is specified.\n"
812 " -C, -- report statistics in a machine parsable format\n"
813 " -P, -- use a pattern to verify read data\n"
814 " -v, -- dump buffer to standard output\n"
815 " -q, -- quiet mode, do not show I/O statistics\n"
819 static int readv_f(BlockBackend *blk, int argc, char **argv);
821 static const cmdinfo_t readv_cmd = {
826 .args = "[-Cqv] [-P pattern] off len [len..]",
827 .oneline = "reads a number of bytes at a specified offset",
831 static int readv_f(BlockBackend *blk, int argc, char **argv)
833 struct timeval t1, t2;
834 bool Cflag = false, qflag = false, vflag = false;
838 /* Some compilers get confused and warn if this is not initialized. */
845 while ((c = getopt(argc, argv, "CP:qv")) != -1) {
852 pattern = parse_pattern(optarg);
864 return qemuio_command_usage(&readv_cmd);
868 if (optind > argc - 2) {
869 return qemuio_command_usage(&readv_cmd);
873 offset = cvtnum(argv[optind]);
875 print_cvtnum_err(offset, argv[optind]);
880 nr_iov = argc - optind;
881 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab);
886 gettimeofday(&t1, NULL);
887 cnt = do_aio_readv(blk, &qiov, offset, &total);
888 gettimeofday(&t2, NULL);
891 printf("readv failed: %s\n", strerror(-cnt));
896 void *cmp_buf = g_malloc(qiov.size);
897 memset(cmp_buf, pattern, qiov.size);
898 if (memcmp(buf, cmp_buf, qiov.size)) {
899 printf("Pattern verification failed at offset %"
900 PRId64 ", %zd bytes\n", offset, qiov.size);
910 dump_buffer(buf, offset, qiov.size);
913 /* Finally, report back -- -C gives a parsable format */
915 print_report("read", &t2, offset, qiov.size, total, cnt, Cflag);
918 qemu_iovec_destroy(&qiov);
923 static void write_help(void)
927 " writes a range of bytes from the given offset\n"
930 " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n"
932 " Writes into a segment of the currently open file, using a buffer\n"
933 " filled with a set pattern (0xcdcdcdcd).\n"
934 " -b, -- write to the VM state rather than the virtual disk\n"
935 " -c, -- write compressed data with blk_write_compressed\n"
936 " -f, -- use Force Unit Access semantics\n"
937 " -p, -- ignored for backwards compatibility\n"
938 " -P, -- use different pattern to fill file\n"
939 " -C, -- report statistics in a machine parsable format\n"
940 " -q, -- quiet mode, do not show I/O statistics\n"
941 " -u, -- with -z, allow unmapping\n"
942 " -z, -- write zeroes using blk_co_pwrite_zeroes\n"
946 static int write_f(BlockBackend *blk, int argc, char **argv);
948 static const cmdinfo_t write_cmd = {
952 .perm = BLK_PERM_WRITE,
955 .args = "[-bcCfquz] [-P pattern] off len",
956 .oneline = "writes a number of bytes at a specified offset",
960 static int write_f(BlockBackend *blk, int argc, char **argv)
962 struct timeval t1, t2;
963 bool Cflag = false, qflag = false, bflag = false;
964 bool Pflag = false, zflag = false, cflag = false;
970 /* Some compilers get confused and warn if this is not initialized. */
974 while ((c = getopt(argc, argv, "bcCfpP:quz")) != -1) {
986 flags |= BDRV_REQ_FUA;
989 /* Ignored for backwards compatibility */
993 pattern = parse_pattern(optarg);
1002 flags |= BDRV_REQ_MAY_UNMAP;
1008 return qemuio_command_usage(&write_cmd);
1012 if (optind != argc - 2) {
1013 return qemuio_command_usage(&write_cmd);
1016 if (bflag && zflag) {
1017 printf("-b and -z cannot be specified at the same time\n");
1021 if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) {
1022 printf("-f and -b or -c cannot be specified at the same time\n");
1026 if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) {
1027 printf("-u requires -z to be specified\n");
1031 if (zflag && Pflag) {
1032 printf("-z and -P cannot be specified at the same time\n");
1036 offset = cvtnum(argv[optind]);
1038 print_cvtnum_err(offset, argv[optind]);
1043 count = cvtnum(argv[optind]);
1045 print_cvtnum_err(count, argv[optind]);
1047 } else if (count > BDRV_REQUEST_MAX_BYTES) {
1048 printf("length cannot exceed %" PRIu64 ", given %s\n",
1049 (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]);
1053 if (bflag || cflag) {
1054 if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) {
1055 printf("%" PRId64 " is not a sector-aligned value for 'offset'\n",
1060 if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) {
1061 printf("%"PRId64" is not a sector-aligned value for 'count'\n",
1068 buf = qemu_io_alloc(blk, count, pattern);
1071 gettimeofday(&t1, NULL);
1073 cnt = do_save_vmstate(blk, buf, offset, count, &total);
1075 cnt = do_co_pwrite_zeroes(blk, offset, count, flags, &total);
1077 cnt = do_write_compressed(blk, buf, offset, count, &total);
1079 cnt = do_pwrite(blk, buf, offset, count, flags, &total);
1081 gettimeofday(&t2, NULL);
1084 printf("write failed: %s\n", strerror(-cnt));
1092 /* Finally, report back -- -C gives a parsable format */
1094 print_report("wrote", &t2, offset, count, total, cnt, Cflag);
1109 " writes a range of bytes from the given offset source from multiple buffers\n"
1112 " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1114 " Writes into a segment of the currently open file, using a buffer\n"
1115 " filled with a set pattern (0xcdcdcdcd).\n"
1116 " -P, -- use different pattern to fill file\n"
1117 " -C, -- report statistics in a machine parsable format\n"
1118 " -f, -- use Force Unit Access semantics\n"
1119 " -q, -- quiet mode, do not show I/O statistics\n"
1123 static int writev_f(BlockBackend *blk, int argc, char **argv);
1125 static const cmdinfo_t writev_cmd = {
1128 .perm = BLK_PERM_WRITE,
1131 .args = "[-Cfq] [-P pattern] off len [len..]",
1132 .oneline = "writes a number of bytes at a specified offset",
1133 .help = writev_help,
1136 static int writev_f(BlockBackend *blk, int argc, char **argv)
1138 struct timeval t1, t2;
1139 bool Cflag = false, qflag = false;
1144 /* Some compilers get confused and warn if this is not initialized. */
1150 while ((c = getopt(argc, argv, "CfqP:")) != -1) {
1156 flags |= BDRV_REQ_FUA;
1162 pattern = parse_pattern(optarg);
1168 return qemuio_command_usage(&writev_cmd);
1172 if (optind > argc - 2) {
1173 return qemuio_command_usage(&writev_cmd);
1176 offset = cvtnum(argv[optind]);
1178 print_cvtnum_err(offset, argv[optind]);
1183 nr_iov = argc - optind;
1184 buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern);
1189 gettimeofday(&t1, NULL);
1190 cnt = do_aio_writev(blk, &qiov, offset, flags, &total);
1191 gettimeofday(&t2, NULL);
1194 printf("writev failed: %s\n", strerror(-cnt));
1202 /* Finally, report back -- -C gives a parsable format */
1204 print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag);
1206 qemu_iovec_destroy(&qiov);
1221 BlockAcctCookie acct;
1226 static void aio_write_done(void *opaque, int ret)
1228 struct aio_ctx *ctx = opaque;
1231 gettimeofday(&t2, NULL);
1235 printf("aio_write failed: %s\n", strerror(-ret));
1236 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1240 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1246 /* Finally, report back -- -C gives a parsable format */
1247 t2 = tsub(t2, ctx->t1);
1248 print_report("wrote", &t2, ctx->offset, ctx->qiov.size,
1249 ctx->qiov.size, 1, ctx->Cflag);
1252 qemu_io_free(ctx->buf);
1253 qemu_iovec_destroy(&ctx->qiov);
1258 static void aio_read_done(void *opaque, int ret)
1260 struct aio_ctx *ctx = opaque;
1263 gettimeofday(&t2, NULL);
1266 printf("readv failed: %s\n", strerror(-ret));
1267 block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct);
1272 void *cmp_buf = g_malloc(ctx->qiov.size);
1274 memset(cmp_buf, ctx->pattern, ctx->qiov.size);
1275 if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) {
1276 printf("Pattern verification failed at offset %"
1277 PRId64 ", %zd bytes\n", ctx->offset, ctx->qiov.size);
1282 block_acct_done(blk_get_stats(ctx->blk), &ctx->acct);
1289 dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size);
1292 /* Finally, report back -- -C gives a parsable format */
1293 t2 = tsub(t2, ctx->t1);
1294 print_report("read", &t2, ctx->offset, ctx->qiov.size,
1295 ctx->qiov.size, 1, ctx->Cflag);
1297 qemu_io_free(ctx->buf);
1298 qemu_iovec_destroy(&ctx->qiov);
1302 static void aio_read_help(void)
1306 " asynchronously reads a range of bytes from the given offset\n"
1309 " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n"
1311 " Reads a segment of the currently open file, optionally dumping it to the\n"
1312 " standard output stream (with -v option) for subsequent inspection.\n"
1313 " The read is performed asynchronously and the aio_flush command must be\n"
1314 " used to ensure all outstanding aio requests have been completed.\n"
1315 " -C, -- report statistics in a machine parsable format\n"
1316 " -P, -- use a pattern to verify read data\n"
1317 " -i, -- treat request as invalid, for exercising stats\n"
1318 " -v, -- dump buffer to standard output\n"
1319 " -q, -- quiet mode, do not show I/O statistics\n"
1323 static int aio_read_f(BlockBackend *blk, int argc, char **argv);
1325 static const cmdinfo_t aio_read_cmd = {
1327 .cfunc = aio_read_f,
1330 .args = "[-Ciqv] [-P pattern] off len [len..]",
1331 .oneline = "asynchronously reads a number of bytes",
1332 .help = aio_read_help,
1335 static int aio_read_f(BlockBackend *blk, int argc, char **argv)
1338 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1341 while ((c = getopt(argc, argv, "CP:iqv")) != -1) {
1348 ctx->pattern = parse_pattern(optarg);
1349 if (ctx->pattern < 0) {
1355 printf("injecting invalid read request\n");
1356 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1367 return qemuio_command_usage(&aio_read_cmd);
1371 if (optind > argc - 2) {
1373 return qemuio_command_usage(&aio_read_cmd);
1376 ctx->offset = cvtnum(argv[optind]);
1377 if (ctx->offset < 0) {
1378 print_cvtnum_err(ctx->offset, argv[optind]);
1384 nr_iov = argc - optind;
1385 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab);
1386 if (ctx->buf == NULL) {
1387 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ);
1392 gettimeofday(&ctx->t1, NULL);
1393 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1395 blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx);
1399 static void aio_write_help(void)
1403 " asynchronously writes a range of bytes from the given offset source\n"
1404 " from multiple buffers\n"
1407 " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n"
1409 " Writes into a segment of the currently open file, using a buffer\n"
1410 " filled with a set pattern (0xcdcdcdcd).\n"
1411 " The write is performed asynchronously and the aio_flush command must be\n"
1412 " used to ensure all outstanding aio requests have been completed.\n"
1413 " -P, -- use different pattern to fill file\n"
1414 " -C, -- report statistics in a machine parsable format\n"
1415 " -f, -- use Force Unit Access semantics\n"
1416 " -i, -- treat request as invalid, for exercising stats\n"
1417 " -q, -- quiet mode, do not show I/O statistics\n"
1418 " -u, -- with -z, allow unmapping\n"
1419 " -z, -- write zeroes using blk_aio_pwrite_zeroes\n"
1423 static int aio_write_f(BlockBackend *blk, int argc, char **argv);
1425 static const cmdinfo_t aio_write_cmd = {
1426 .name = "aio_write",
1427 .cfunc = aio_write_f,
1428 .perm = BLK_PERM_WRITE,
1431 .args = "[-Cfiquz] [-P pattern] off len [len..]",
1432 .oneline = "asynchronously writes a number of bytes",
1433 .help = aio_write_help,
1436 static int aio_write_f(BlockBackend *blk, int argc, char **argv)
1440 struct aio_ctx *ctx = g_new0(struct aio_ctx, 1);
1444 while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) {
1450 flags |= BDRV_REQ_FUA;
1456 flags |= BDRV_REQ_MAY_UNMAP;
1459 pattern = parse_pattern(optarg);
1466 printf("injecting invalid write request\n");
1467 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1475 return qemuio_command_usage(&aio_write_cmd);
1479 if (optind > argc - 2) {
1481 return qemuio_command_usage(&aio_write_cmd);
1484 if (ctx->zflag && optind != argc - 2) {
1485 printf("-z supports only a single length parameter\n");
1490 if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) {
1491 printf("-u requires -z to be specified\n");
1496 if (ctx->zflag && ctx->Pflag) {
1497 printf("-z and -P cannot be specified at the same time\n");
1502 ctx->offset = cvtnum(argv[optind]);
1503 if (ctx->offset < 0) {
1504 print_cvtnum_err(ctx->offset, argv[optind]);
1511 int64_t count = cvtnum(argv[optind]);
1513 print_cvtnum_err(count, argv[optind]);
1518 ctx->qiov.size = count;
1519 blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done,
1522 nr_iov = argc - optind;
1523 ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov,
1525 if (ctx->buf == NULL) {
1526 block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE);
1531 gettimeofday(&ctx->t1, NULL);
1532 block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size,
1535 blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done,
1541 static int aio_flush_f(BlockBackend *blk, int argc, char **argv)
1543 BlockAcctCookie cookie;
1544 block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH);
1546 block_acct_done(blk_get_stats(blk), &cookie);
1550 static const cmdinfo_t aio_flush_cmd = {
1551 .name = "aio_flush",
1552 .cfunc = aio_flush_f,
1553 .oneline = "completes all outstanding aio requests"
1556 static int flush_f(BlockBackend *blk, int argc, char **argv)
1562 static const cmdinfo_t flush_cmd = {
1566 .oneline = "flush all in-core file state to disk",
1569 static int truncate_f(BlockBackend *blk, int argc, char **argv)
1571 Error *local_err = NULL;
1575 offset = cvtnum(argv[1]);
1577 print_cvtnum_err(offset, argv[1]);
1581 ret = blk_truncate(blk, offset, PREALLOC_MODE_OFF, &local_err);
1583 error_report_err(local_err);
1590 static const cmdinfo_t truncate_cmd = {
1593 .cfunc = truncate_f,
1594 .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE,
1598 .oneline = "truncates the current file at the given offset",
1601 static int length_f(BlockBackend *blk, int argc, char **argv)
1606 size = blk_getlength(blk);
1608 printf("getlength: %s\n", strerror(-size));
1612 cvtstr(size, s1, sizeof(s1));
1618 static const cmdinfo_t length_cmd = {
1622 .oneline = "gets the length of the current file",
1626 static int info_f(BlockBackend *blk, int argc, char **argv)
1628 BlockDriverState *bs = blk_bs(blk);
1629 BlockDriverInfo bdi;
1630 ImageInfoSpecific *spec_info;
1631 char s1[64], s2[64];
1634 if (bs->drv && bs->drv->format_name) {
1635 printf("format name: %s\n", bs->drv->format_name);
1637 if (bs->drv && bs->drv->protocol_name) {
1638 printf("format name: %s\n", bs->drv->protocol_name);
1641 ret = bdrv_get_info(bs, &bdi);
1646 cvtstr(bdi.cluster_size, s1, sizeof(s1));
1647 cvtstr(bdi.vm_state_offset, s2, sizeof(s2));
1649 printf("cluster size: %s\n", s1);
1650 printf("vm state offset: %s\n", s2);
1652 spec_info = bdrv_get_specific_info(bs);
1654 printf("Format specific information:\n");
1655 bdrv_image_info_specific_dump(fprintf, stdout, spec_info);
1656 qapi_free_ImageInfoSpecific(spec_info);
1664 static const cmdinfo_t info_cmd = {
1668 .oneline = "prints information about the current file",
1671 static void discard_help(void)
1675 " discards a range of bytes from the given offset\n"
1678 " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n"
1680 " Discards a segment of the currently open file.\n"
1681 " -C, -- report statistics in a machine parsable format\n"
1682 " -q, -- quiet mode, do not show I/O statistics\n"
1686 static int discard_f(BlockBackend *blk, int argc, char **argv);
1688 static const cmdinfo_t discard_cmd = {
1692 .perm = BLK_PERM_WRITE,
1695 .args = "[-Cq] off len",
1696 .oneline = "discards a number of bytes at a specified offset",
1697 .help = discard_help,
1700 static int discard_f(BlockBackend *blk, int argc, char **argv)
1702 struct timeval t1, t2;
1703 bool Cflag = false, qflag = false;
1705 int64_t offset, bytes;
1707 while ((c = getopt(argc, argv, "Cq")) != -1) {
1716 return qemuio_command_usage(&discard_cmd);
1720 if (optind != argc - 2) {
1721 return qemuio_command_usage(&discard_cmd);
1724 offset = cvtnum(argv[optind]);
1726 print_cvtnum_err(offset, argv[optind]);
1731 bytes = cvtnum(argv[optind]);
1733 print_cvtnum_err(bytes, argv[optind]);
1735 } else if (bytes >> BDRV_SECTOR_BITS > BDRV_REQUEST_MAX_SECTORS) {
1736 printf("length cannot exceed %"PRIu64", given %s\n",
1737 (uint64_t)BDRV_REQUEST_MAX_SECTORS << BDRV_SECTOR_BITS,
1742 gettimeofday(&t1, NULL);
1743 ret = blk_pdiscard(blk, offset, bytes);
1744 gettimeofday(&t2, NULL);
1747 printf("discard failed: %s\n", strerror(-ret));
1751 /* Finally, report back -- -C gives a parsable format */
1754 print_report("discard", &t2, offset, bytes, bytes, 1, Cflag);
1761 static int alloc_f(BlockBackend *blk, int argc, char **argv)
1763 BlockDriverState *bs = blk_bs(blk);
1764 int64_t offset, start, remaining, count;
1767 int64_t num, sum_alloc;
1769 start = offset = cvtnum(argv[1]);
1771 print_cvtnum_err(offset, argv[1]);
1776 count = cvtnum(argv[2]);
1778 print_cvtnum_err(count, argv[2]);
1782 count = BDRV_SECTOR_SIZE;
1788 ret = bdrv_is_allocated(bs, offset, remaining, &num);
1790 printf("is_allocated failed: %s\n", strerror(-ret));
1804 cvtstr(start, s1, sizeof(s1));
1806 printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n",
1807 sum_alloc, count, s1);
1811 static const cmdinfo_t alloc_cmd = {
1817 .args = "offset [count]",
1818 .oneline = "checks if offset is allocated in the file",
1822 static int map_is_allocated(BlockDriverState *bs, int64_t offset,
1823 int64_t bytes, int64_t *pnum)
1829 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
1830 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1838 while (bytes > 0 && ret == firstret) {
1842 num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES);
1843 ret = bdrv_is_allocated(bs, offset, num_checked, &num);
1844 if (ret == firstret && num) {
1854 static int map_f(BlockBackend *blk, int argc, char **argv)
1856 int64_t offset, bytes;
1857 char s1[64], s2[64];
1863 bytes = blk_getlength(blk);
1865 error_report("Failed to query image length: %s", strerror(-bytes));
1870 ret = map_is_allocated(blk_bs(blk), offset, bytes, &num);
1872 error_report("Failed to get allocation status: %s", strerror(-ret));
1875 error_report("Unexpected end of image");
1879 retstr = ret ? " allocated" : "not allocated";
1880 cvtstr(num, s1, sizeof(s1));
1881 cvtstr(offset, s2, sizeof(s2));
1882 printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n",
1883 s1, num, retstr, s2, offset);
1892 static const cmdinfo_t map_cmd = {
1898 .oneline = "prints the allocated areas of a file",
1901 static void reopen_help(void)
1905 " Changes the open options of an already opened image\n"
1908 " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n"
1910 " -r, -- Reopen the image read-only\n"
1911 " -w, -- Reopen the image read-write\n"
1912 " -c, -- Change the cache mode to the given value\n"
1913 " -o, -- Changes block driver options (cf. 'open' command)\n"
1917 static int reopen_f(BlockBackend *blk, int argc, char **argv);
1919 static QemuOptsList reopen_opts = {
1921 .merge_lists = true,
1922 .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head),
1924 /* no elements => accept any params */
1925 { /* end of list */ }
1929 static const cmdinfo_t reopen_cmd = {
1934 .args = "[(-r|-w)] [-c cache] [-o options]",
1935 .oneline = "reopens an image with new options",
1936 .help = reopen_help,
1939 static int reopen_f(BlockBackend *blk, int argc, char **argv)
1941 BlockDriverState *bs = blk_bs(blk);
1945 int flags = bs->open_flags;
1946 bool writethrough = !blk_enable_write_cache(blk);
1947 bool has_rw_option = false;
1949 BlockReopenQueue *brq;
1950 Error *local_err = NULL;
1952 while ((c = getopt(argc, argv, "c:o:rw")) != -1) {
1955 if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
1956 error_report("Invalid cache option: %s", optarg);
1961 if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) {
1962 qemu_opts_reset(&reopen_opts);
1967 if (has_rw_option) {
1968 error_report("Only one -r/-w option may be given");
1971 flags &= ~BDRV_O_RDWR;
1972 has_rw_option = true;
1975 if (has_rw_option) {
1976 error_report("Only one -r/-w option may be given");
1979 flags |= BDRV_O_RDWR;
1980 has_rw_option = true;
1983 qemu_opts_reset(&reopen_opts);
1984 return qemuio_command_usage(&reopen_cmd);
1988 if (optind != argc) {
1989 qemu_opts_reset(&reopen_opts);
1990 return qemuio_command_usage(&reopen_cmd);
1993 if (writethrough != blk_enable_write_cache(blk) &&
1994 blk_get_attached_dev(blk))
1996 error_report("Cannot change cache.writeback: Device attached");
1997 qemu_opts_reset(&reopen_opts);
2001 if (!(flags & BDRV_O_RDWR)) {
2002 uint64_t orig_perm, orig_shared_perm;
2006 blk_get_perm(blk, &orig_perm, &orig_shared_perm);
2008 orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED),
2013 qopts = qemu_opts_find(&reopen_opts, NULL);
2014 opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : NULL;
2015 qemu_opts_reset(&reopen_opts);
2017 bdrv_subtree_drained_begin(bs);
2018 brq = bdrv_reopen_queue(NULL, bs, opts, flags);
2019 bdrv_reopen_multiple(bdrv_get_aio_context(bs), brq, &local_err);
2020 bdrv_subtree_drained_end(bs);
2023 error_report_err(local_err);
2025 blk_set_enable_write_cache(blk, !writethrough);
2031 static int break_f(BlockBackend *blk, int argc, char **argv)
2035 ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]);
2037 printf("Could not set breakpoint: %s\n", strerror(-ret));
2043 static int remove_break_f(BlockBackend *blk, int argc, char **argv)
2047 ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]);
2049 printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret));
2055 static const cmdinfo_t break_cmd = {
2060 .args = "event tag",
2061 .oneline = "sets a breakpoint on event and tags the stopped "
2065 static const cmdinfo_t remove_break_cmd = {
2066 .name = "remove_break",
2069 .cfunc = remove_break_f,
2071 .oneline = "remove a breakpoint by tag",
2074 static int resume_f(BlockBackend *blk, int argc, char **argv)
2078 ret = bdrv_debug_resume(blk_bs(blk), argv[1]);
2080 printf("Could not resume request: %s\n", strerror(-ret));
2086 static const cmdinfo_t resume_cmd = {
2092 .oneline = "resumes the request tagged as tag",
2095 static int wait_break_f(BlockBackend *blk, int argc, char **argv)
2097 while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) {
2098 aio_poll(blk_get_aio_context(blk), true);
2104 static const cmdinfo_t wait_break_cmd = {
2105 .name = "wait_break",
2108 .cfunc = wait_break_f,
2110 .oneline = "waits for the suspension of a request",
2113 static int abort_f(BlockBackend *blk, int argc, char **argv)
2118 static const cmdinfo_t abort_cmd = {
2121 .flags = CMD_NOFILE_OK,
2122 .oneline = "simulate a program crash using abort(3)",
2125 static void sigraise_help(void)
2129 " raises the given signal\n"
2132 " 'sigraise %i' - raises SIGTERM\n"
2134 " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n"
2135 " given to sigraise.\n"
2139 static int sigraise_f(BlockBackend *blk, int argc, char **argv);
2141 static const cmdinfo_t sigraise_cmd = {
2143 .cfunc = sigraise_f,
2146 .flags = CMD_NOFILE_OK,
2148 .oneline = "raises a signal",
2149 .help = sigraise_help,
2152 static int sigraise_f(BlockBackend *blk, int argc, char **argv)
2154 int64_t sig = cvtnum(argv[1]);
2156 print_cvtnum_err(sig, argv[1]);
2158 } else if (sig > NSIG) {
2159 printf("signal argument '%s' is too large to be a valid signal\n",
2164 /* Using raise() to kill this process does not necessarily flush all open
2165 * streams. At least stdout and stderr (although the latter should be
2166 * non-buffered anyway) should be flushed, though. */
2174 static void sleep_cb(void *opaque)
2176 bool *expired = opaque;
2180 static int sleep_f(BlockBackend *blk, int argc, char **argv)
2184 struct QEMUTimer *timer;
2185 bool expired = false;
2187 ms = strtol(argv[1], &endptr, 0);
2188 if (ms < 0 || *endptr != '\0') {
2189 printf("%s is not a valid number\n", argv[1]);
2193 timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired);
2194 timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms);
2197 main_loop_wait(false);
2205 static const cmdinfo_t sleep_cmd = {
2210 .flags = CMD_NOFILE_OK,
2211 .oneline = "waits for the given value in milliseconds",
2214 static void help_oneline(const char *cmd, const cmdinfo_t *ct)
2219 printf("%s ", ct->name);
2221 printf("(or %s) ", ct->altname);
2226 printf("%s ", ct->args);
2228 printf("-- %s\n", ct->oneline);
2231 static void help_onecmd(const char *cmd, const cmdinfo_t *ct)
2233 help_oneline(cmd, ct);
2239 static void help_all(void)
2241 const cmdinfo_t *ct;
2243 for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) {
2244 help_oneline(ct->name, ct);
2246 printf("\nUse 'help commandname' for extended help.\n");
2249 static int help_f(BlockBackend *blk, int argc, char **argv)
2251 const cmdinfo_t *ct;
2258 ct = find_command(argv[1]);
2260 printf("command %s not found\n", argv[1]);
2264 help_onecmd(argv[1], ct);
2268 static const cmdinfo_t help_cmd = {
2274 .flags = CMD_FLAG_GLOBAL,
2275 .args = "[command]",
2276 .oneline = "help for one or all commands",
2279 bool qemuio_command(BlockBackend *blk, const char *cmd)
2283 const cmdinfo_t *ct;
2288 input = g_strdup(cmd);
2289 v = breakline(input, &c);
2291 ct = find_command(v[0]);
2293 ctx = blk ? blk_get_aio_context(blk) : qemu_get_aio_context();
2294 aio_context_acquire(ctx);
2295 done = command(blk, ct, c, v);
2296 aio_context_release(ctx);
2298 fprintf(stderr, "command \"%s\" not found\n", v[0]);
2307 static void __attribute((constructor)) init_qemuio_commands(void)
2309 /* initialize commands */
2310 qemuio_add_command(&help_cmd);
2311 qemuio_add_command(&read_cmd);
2312 qemuio_add_command(&readv_cmd);
2313 qemuio_add_command(&write_cmd);
2314 qemuio_add_command(&writev_cmd);
2315 qemuio_add_command(&aio_read_cmd);
2316 qemuio_add_command(&aio_write_cmd);
2317 qemuio_add_command(&aio_flush_cmd);
2318 qemuio_add_command(&flush_cmd);
2319 qemuio_add_command(&truncate_cmd);
2320 qemuio_add_command(&length_cmd);
2321 qemuio_add_command(&info_cmd);
2322 qemuio_add_command(&discard_cmd);
2323 qemuio_add_command(&alloc_cmd);
2324 qemuio_add_command(&map_cmd);
2325 qemuio_add_command(&reopen_cmd);
2326 qemuio_add_command(&break_cmd);
2327 qemuio_add_command(&remove_break_cmd);
2328 qemuio_add_command(&resume_cmd);
2329 qemuio_add_command(&wait_break_cmd);
2330 qemuio_add_command(&abort_cmd);
2331 qemuio_add_command(&sleep_cmd);
2332 qemuio_add_command(&sigraise_cmd);