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Commit | Line | Data |
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1 | /* | |
2 | * Command line utility to exercise the QEMU I/O path. | |
3 | * | |
4 | * Copyright (C) 2009-2016 Red Hat, Inc. | |
5 | * Copyright (c) 2003-2005 Silicon Graphics, Inc. | |
6 | * | |
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. | |
9 | */ | |
10 | ||
11 | #include "qemu/osdep.h" | |
12 | #include "qapi/error.h" | |
13 | #include "qapi/qmp/qdict.h" | |
14 | #include "qemu-io.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 | ||
25 | #define CMD_NOFILE_OK 0x01 | |
26 | ||
27 | bool qemuio_misalign; | |
28 | ||
29 | static cmdinfo_t *cmdtab; | |
30 | static int ncmds; | |
31 | ||
32 | static int compare_cmdname(const void *a, const void *b) | |
33 | { | |
34 | return strcmp(((const cmdinfo_t *)a)->name, | |
35 | ((const cmdinfo_t *)b)->name); | |
36 | } | |
37 | ||
38 | void qemuio_add_command(const cmdinfo_t *ci) | |
39 | { | |
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. | |
44 | */ | |
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); | |
50 | } | |
51 | ||
52 | void qemuio_command_usage(const cmdinfo_t *ci) | |
53 | { | |
54 | printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline); | |
55 | } | |
56 | ||
57 | static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct) | |
58 | { | |
59 | if (ct->flags & CMD_FLAG_GLOBAL) { | |
60 | return 1; | |
61 | } | |
62 | if (!(ct->flags & CMD_NOFILE_OK) && !blk) { | |
63 | fprintf(stderr, "no file open, try 'help open'\n"); | |
64 | return 0; | |
65 | } | |
66 | return 1; | |
67 | } | |
68 | ||
69 | static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc, | |
70 | char **argv) | |
71 | { | |
72 | char *cmd = argv[0]; | |
73 | ||
74 | if (!init_check_command(blk, ct)) { | |
75 | return -EINVAL; | |
76 | } | |
77 | ||
78 | if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) { | |
79 | if (ct->argmax == -1) { | |
80 | fprintf(stderr, | |
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) { | |
84 | fprintf(stderr, | |
85 | "bad argument count %d to %s, expected %d arguments\n", | |
86 | argc-1, cmd, ct->argmin); | |
87 | } else { | |
88 | fprintf(stderr, | |
89 | "bad argument count %d to %s, expected between %d and %d arguments\n", | |
90 | argc-1, cmd, ct->argmin, ct->argmax); | |
91 | } | |
92 | return -EINVAL; | |
93 | } | |
94 | ||
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); | |
101 | ||
102 | if (ct->perm & ~orig_perm) { | |
103 | uint64_t new_perm; | |
104 | Error *local_err = NULL; | |
105 | int ret; | |
106 | ||
107 | new_perm = orig_perm | ct->perm; | |
108 | ||
109 | ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err); | |
110 | if (ret < 0) { | |
111 | error_report_err(local_err); | |
112 | return ret; | |
113 | } | |
114 | } | |
115 | } | |
116 | ||
117 | qemu_reset_optind(); | |
118 | return ct->cfunc(blk, argc, argv); | |
119 | } | |
120 | ||
121 | static const cmdinfo_t *find_command(const char *cmd) | |
122 | { | |
123 | cmdinfo_t *ct; | |
124 | ||
125 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
126 | if (strcmp(ct->name, cmd) == 0 || | |
127 | (ct->altname && strcmp(ct->altname, cmd) == 0)) | |
128 | { | |
129 | return (const cmdinfo_t *)ct; | |
130 | } | |
131 | } | |
132 | return NULL; | |
133 | } | |
134 | ||
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), | |
138 | void *opaque) | |
139 | { | |
140 | cmdinfo_t *ct; | |
141 | size_t input_len = strlen(input); | |
142 | ||
143 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
144 | if (strncmp(input, ct->name, input_len) == 0) { | |
145 | fn(ct->name, opaque); | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
150 | static char **breakline(char *input, int *count) | |
151 | { | |
152 | int c = 0; | |
153 | char *p; | |
154 | char **rval = g_new0(char *, 1); | |
155 | ||
156 | while (rval && (p = qemu_strsep(&input, " ")) != NULL) { | |
157 | if (!*p) { | |
158 | continue; | |
159 | } | |
160 | c++; | |
161 | rval = g_renew(char *, rval, (c + 1)); | |
162 | rval[c - 1] = p; | |
163 | rval[c] = NULL; | |
164 | } | |
165 | *count = c; | |
166 | return rval; | |
167 | } | |
168 | ||
169 | static int64_t cvtnum(const char *s) | |
170 | { | |
171 | int err; | |
172 | uint64_t value; | |
173 | ||
174 | err = qemu_strtosz(s, NULL, &value); | |
175 | if (err < 0) { | |
176 | return err; | |
177 | } | |
178 | if (value > INT64_MAX) { | |
179 | return -ERANGE; | |
180 | } | |
181 | return value; | |
182 | } | |
183 | ||
184 | static void print_cvtnum_err(int64_t rc, const char *arg) | |
185 | { | |
186 | switch (rc) { | |
187 | case -EINVAL: | |
188 | printf("Parsing error: non-numeric argument," | |
189 | " or extraneous/unrecognized suffix -- %s\n", arg); | |
190 | break; | |
191 | case -ERANGE: | |
192 | printf("Parsing error: argument too large -- %s\n", arg); | |
193 | break; | |
194 | default: | |
195 | printf("Parsing error: %s\n", arg); | |
196 | } | |
197 | } | |
198 | ||
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) | |
205 | ||
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)) | |
212 | ||
213 | static void cvtstr(double value, char *str, size_t size) | |
214 | { | |
215 | char *trim; | |
216 | const char *suffix; | |
217 | ||
218 | if (value >= EXABYTES(1)) { | |
219 | suffix = " EiB"; | |
220 | snprintf(str, size - 4, "%.3f", TO_EXABYTES(value)); | |
221 | } else if (value >= PETABYTES(1)) { | |
222 | suffix = " PiB"; | |
223 | snprintf(str, size - 4, "%.3f", TO_PETABYTES(value)); | |
224 | } else if (value >= TERABYTES(1)) { | |
225 | suffix = " TiB"; | |
226 | snprintf(str, size - 4, "%.3f", TO_TERABYTES(value)); | |
227 | } else if (value >= GIGABYTES(1)) { | |
228 | suffix = " GiB"; | |
229 | snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value)); | |
230 | } else if (value >= MEGABYTES(1)) { | |
231 | suffix = " MiB"; | |
232 | snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value)); | |
233 | } else if (value >= KILOBYTES(1)) { | |
234 | suffix = " KiB"; | |
235 | snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value)); | |
236 | } else { | |
237 | suffix = " bytes"; | |
238 | snprintf(str, size - 6, "%f", value); | |
239 | } | |
240 | ||
241 | trim = strstr(str, ".000"); | |
242 | if (trim) { | |
243 | strcpy(trim, suffix); | |
244 | } else { | |
245 | strcat(str, suffix); | |
246 | } | |
247 | } | |
248 | ||
249 | ||
250 | ||
251 | static struct timespec tsub(struct timespec t1, struct timespec t2) | |
252 | { | |
253 | t1.tv_nsec -= t2.tv_nsec; | |
254 | if (t1.tv_nsec < 0) { | |
255 | t1.tv_nsec += NANOSECONDS_PER_SECOND; | |
256 | t1.tv_sec--; | |
257 | } | |
258 | t1.tv_sec -= t2.tv_sec; | |
259 | return t1; | |
260 | } | |
261 | ||
262 | static double tdiv(double value, struct timespec tv) | |
263 | { | |
264 | double seconds = tv.tv_sec + (tv.tv_nsec / 1e9); | |
265 | return value / seconds; | |
266 | } | |
267 | ||
268 | #define HOURS(sec) ((sec) / (60 * 60)) | |
269 | #define MINUTES(sec) (((sec) % (60 * 60)) / 60) | |
270 | #define SECONDS(sec) ((sec) % 60) | |
271 | ||
272 | enum { | |
273 | DEFAULT_TIME = 0x0, | |
274 | TERSE_FIXED_TIME = 0x1, | |
275 | VERBOSE_FIXED_TIME = 0x2, | |
276 | }; | |
277 | ||
278 | static void timestr(struct timespec *tv, char *ts, size_t size, int format) | |
279 | { | |
280 | double frac_sec = tv->tv_nsec / 1e9; | |
281 | ||
282 | if (format & TERSE_FIXED_TIME) { | |
283 | if (!HOURS(tv->tv_sec)) { | |
284 | snprintf(ts, size, "%u:%05.2f", | |
285 | (unsigned int) MINUTES(tv->tv_sec), | |
286 | SECONDS(tv->tv_sec) + frac_sec); | |
287 | return; | |
288 | } | |
289 | format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */ | |
290 | } | |
291 | ||
292 | if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) { | |
293 | snprintf(ts, size, "%u:%02u:%05.2f", | |
294 | (unsigned int) HOURS(tv->tv_sec), | |
295 | (unsigned int) MINUTES(tv->tv_sec), | |
296 | SECONDS(tv->tv_sec) + frac_sec); | |
297 | } else { | |
298 | snprintf(ts, size, "%05.2f sec", frac_sec); | |
299 | } | |
300 | } | |
301 | ||
302 | /* | |
303 | * Parse the pattern argument to various sub-commands. | |
304 | * | |
305 | * Because the pattern is used as an argument to memset it must evaluate | |
306 | * to an unsigned integer that fits into a single byte. | |
307 | */ | |
308 | static int parse_pattern(const char *arg) | |
309 | { | |
310 | char *endptr = NULL; | |
311 | long pattern; | |
312 | ||
313 | pattern = strtol(arg, &endptr, 0); | |
314 | if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') { | |
315 | printf("%s is not a valid pattern byte\n", arg); | |
316 | return -1; | |
317 | } | |
318 | ||
319 | return pattern; | |
320 | } | |
321 | ||
322 | /* | |
323 | * Memory allocation helpers. | |
324 | * | |
325 | * Make sure memory is aligned by default, or purposefully misaligned if | |
326 | * that is specified on the command line. | |
327 | */ | |
328 | ||
329 | #define MISALIGN_OFFSET 16 | |
330 | static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern) | |
331 | { | |
332 | void *buf; | |
333 | ||
334 | if (qemuio_misalign) { | |
335 | len += MISALIGN_OFFSET; | |
336 | } | |
337 | buf = blk_blockalign(blk, len); | |
338 | memset(buf, pattern, len); | |
339 | if (qemuio_misalign) { | |
340 | buf += MISALIGN_OFFSET; | |
341 | } | |
342 | return buf; | |
343 | } | |
344 | ||
345 | static void qemu_io_free(void *p) | |
346 | { | |
347 | if (qemuio_misalign) { | |
348 | p -= MISALIGN_OFFSET; | |
349 | } | |
350 | qemu_vfree(p); | |
351 | } | |
352 | ||
353 | static void dump_buffer(const void *buffer, int64_t offset, int64_t len) | |
354 | { | |
355 | uint64_t i; | |
356 | int j; | |
357 | const uint8_t *p; | |
358 | ||
359 | for (i = 0, p = buffer; i < len; i += 16) { | |
360 | const uint8_t *s = p; | |
361 | ||
362 | printf("%08" PRIx64 ": ", offset + i); | |
363 | for (j = 0; j < 16 && i + j < len; j++, p++) { | |
364 | printf("%02x ", *p); | |
365 | } | |
366 | printf(" "); | |
367 | for (j = 0; j < 16 && i + j < len; j++, s++) { | |
368 | if (isalnum(*s)) { | |
369 | printf("%c", *s); | |
370 | } else { | |
371 | printf("."); | |
372 | } | |
373 | } | |
374 | printf("\n"); | |
375 | } | |
376 | } | |
377 | ||
378 | static void print_report(const char *op, struct timespec *t, int64_t offset, | |
379 | int64_t count, int64_t total, int cnt, bool Cflag) | |
380 | { | |
381 | char s1[64], s2[64], ts[64]; | |
382 | ||
383 | timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0); | |
384 | if (!Cflag) { | |
385 | cvtstr((double)total, s1, sizeof(s1)); | |
386 | cvtstr(tdiv((double)total, *t), s2, sizeof(s2)); | |
387 | printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n", | |
388 | op, total, count, offset); | |
389 | printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n", | |
390 | s1, cnt, ts, s2, tdiv((double)cnt, *t)); | |
391 | } else {/* bytes,ops,time,bytes/sec,ops/sec */ | |
392 | printf("%"PRId64",%d,%s,%.3f,%.3f\n", | |
393 | total, cnt, ts, | |
394 | tdiv((double)total, *t), | |
395 | tdiv((double)cnt, *t)); | |
396 | } | |
397 | } | |
398 | ||
399 | /* | |
400 | * Parse multiple length statements for vectored I/O, and construct an I/O | |
401 | * vector matching it. | |
402 | */ | |
403 | static void * | |
404 | create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov, | |
405 | int pattern) | |
406 | { | |
407 | size_t *sizes = g_new0(size_t, nr_iov); | |
408 | size_t count = 0; | |
409 | void *buf = NULL; | |
410 | void *p; | |
411 | int i; | |
412 | ||
413 | for (i = 0; i < nr_iov; i++) { | |
414 | char *arg = argv[i]; | |
415 | int64_t len; | |
416 | ||
417 | len = cvtnum(arg); | |
418 | if (len < 0) { | |
419 | print_cvtnum_err(len, arg); | |
420 | goto fail; | |
421 | } | |
422 | ||
423 | if (len > BDRV_REQUEST_MAX_BYTES) { | |
424 | printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg, | |
425 | (uint64_t)BDRV_REQUEST_MAX_BYTES); | |
426 | goto fail; | |
427 | } | |
428 | ||
429 | if (count > BDRV_REQUEST_MAX_BYTES - len) { | |
430 | printf("The total number of bytes exceed the maximum size %" PRIu64 | |
431 | "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES); | |
432 | goto fail; | |
433 | } | |
434 | ||
435 | sizes[i] = len; | |
436 | count += len; | |
437 | } | |
438 | ||
439 | qemu_iovec_init(qiov, nr_iov); | |
440 | ||
441 | buf = p = qemu_io_alloc(blk, count, pattern); | |
442 | ||
443 | for (i = 0; i < nr_iov; i++) { | |
444 | qemu_iovec_add(qiov, p, sizes[i]); | |
445 | p += sizes[i]; | |
446 | } | |
447 | ||
448 | fail: | |
449 | g_free(sizes); | |
450 | return buf; | |
451 | } | |
452 | ||
453 | static int do_pread(BlockBackend *blk, char *buf, int64_t offset, | |
454 | int64_t bytes, int64_t *total) | |
455 | { | |
456 | if (bytes > INT_MAX) { | |
457 | return -ERANGE; | |
458 | } | |
459 | ||
460 | *total = blk_pread(blk, offset, (uint8_t *)buf, bytes); | |
461 | if (*total < 0) { | |
462 | return *total; | |
463 | } | |
464 | return 1; | |
465 | } | |
466 | ||
467 | static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, | |
468 | int64_t bytes, int flags, int64_t *total) | |
469 | { | |
470 | if (bytes > INT_MAX) { | |
471 | return -ERANGE; | |
472 | } | |
473 | ||
474 | *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags); | |
475 | if (*total < 0) { | |
476 | return *total; | |
477 | } | |
478 | return 1; | |
479 | } | |
480 | ||
481 | typedef struct { | |
482 | BlockBackend *blk; | |
483 | int64_t offset; | |
484 | int64_t bytes; | |
485 | int64_t *total; | |
486 | int flags; | |
487 | int ret; | |
488 | bool done; | |
489 | } CoWriteZeroes; | |
490 | ||
491 | static void coroutine_fn co_pwrite_zeroes_entry(void *opaque) | |
492 | { | |
493 | CoWriteZeroes *data = opaque; | |
494 | ||
495 | data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes, | |
496 | data->flags); | |
497 | data->done = true; | |
498 | if (data->ret < 0) { | |
499 | *data->total = data->ret; | |
500 | return; | |
501 | } | |
502 | ||
503 | *data->total = data->bytes; | |
504 | } | |
505 | ||
506 | static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset, | |
507 | int64_t bytes, int flags, int64_t *total) | |
508 | { | |
509 | Coroutine *co; | |
510 | CoWriteZeroes data = { | |
511 | .blk = blk, | |
512 | .offset = offset, | |
513 | .bytes = bytes, | |
514 | .total = total, | |
515 | .flags = flags, | |
516 | .done = false, | |
517 | }; | |
518 | ||
519 | if (bytes > INT_MAX) { | |
520 | return -ERANGE; | |
521 | } | |
522 | ||
523 | co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data); | |
524 | bdrv_coroutine_enter(blk_bs(blk), co); | |
525 | while (!data.done) { | |
526 | aio_poll(blk_get_aio_context(blk), true); | |
527 | } | |
528 | if (data.ret < 0) { | |
529 | return data.ret; | |
530 | } else { | |
531 | return 1; | |
532 | } | |
533 | } | |
534 | ||
535 | static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset, | |
536 | int64_t bytes, int64_t *total) | |
537 | { | |
538 | int ret; | |
539 | ||
540 | if (bytes > BDRV_REQUEST_MAX_BYTES) { | |
541 | return -ERANGE; | |
542 | } | |
543 | ||
544 | ret = blk_pwrite_compressed(blk, offset, buf, bytes); | |
545 | if (ret < 0) { | |
546 | return ret; | |
547 | } | |
548 | *total = bytes; | |
549 | return 1; | |
550 | } | |
551 | ||
552 | static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset, | |
553 | int64_t count, int64_t *total) | |
554 | { | |
555 | if (count > INT_MAX) { | |
556 | return -ERANGE; | |
557 | } | |
558 | ||
559 | *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count); | |
560 | if (*total < 0) { | |
561 | return *total; | |
562 | } | |
563 | return 1; | |
564 | } | |
565 | ||
566 | static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset, | |
567 | int64_t count, int64_t *total) | |
568 | { | |
569 | if (count > INT_MAX) { | |
570 | return -ERANGE; | |
571 | } | |
572 | ||
573 | *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count); | |
574 | if (*total < 0) { | |
575 | return *total; | |
576 | } | |
577 | return 1; | |
578 | } | |
579 | ||
580 | #define NOT_DONE 0x7fffffff | |
581 | static void aio_rw_done(void *opaque, int ret) | |
582 | { | |
583 | *(int *)opaque = ret; | |
584 | } | |
585 | ||
586 | static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov, | |
587 | int64_t offset, int *total) | |
588 | { | |
589 | int async_ret = NOT_DONE; | |
590 | ||
591 | blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret); | |
592 | while (async_ret == NOT_DONE) { | |
593 | main_loop_wait(false); | |
594 | } | |
595 | ||
596 | *total = qiov->size; | |
597 | return async_ret < 0 ? async_ret : 1; | |
598 | } | |
599 | ||
600 | static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov, | |
601 | int64_t offset, int flags, int *total) | |
602 | { | |
603 | int async_ret = NOT_DONE; | |
604 | ||
605 | blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret); | |
606 | while (async_ret == NOT_DONE) { | |
607 | main_loop_wait(false); | |
608 | } | |
609 | ||
610 | *total = qiov->size; | |
611 | return async_ret < 0 ? async_ret : 1; | |
612 | } | |
613 | ||
614 | static void read_help(void) | |
615 | { | |
616 | printf( | |
617 | "\n" | |
618 | " reads a range of bytes from the given offset\n" | |
619 | "\n" | |
620 | " Example:\n" | |
621 | " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n" | |
622 | "\n" | |
623 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
624 | " standard output stream (with -v option) for subsequent inspection.\n" | |
625 | " -b, -- read from the VM state rather than the virtual disk\n" | |
626 | " -C, -- report statistics in a machine parsable format\n" | |
627 | " -l, -- length for pattern verification (only with -P)\n" | |
628 | " -p, -- ignored for backwards compatibility\n" | |
629 | " -P, -- use a pattern to verify read data\n" | |
630 | " -q, -- quiet mode, do not show I/O statistics\n" | |
631 | " -s, -- start offset for pattern verification (only with -P)\n" | |
632 | " -v, -- dump buffer to standard output\n" | |
633 | "\n"); | |
634 | } | |
635 | ||
636 | static int read_f(BlockBackend *blk, int argc, char **argv); | |
637 | ||
638 | static const cmdinfo_t read_cmd = { | |
639 | .name = "read", | |
640 | .altname = "r", | |
641 | .cfunc = read_f, | |
642 | .argmin = 2, | |
643 | .argmax = -1, | |
644 | .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len", | |
645 | .oneline = "reads a number of bytes at a specified offset", | |
646 | .help = read_help, | |
647 | }; | |
648 | ||
649 | static int read_f(BlockBackend *blk, int argc, char **argv) | |
650 | { | |
651 | struct timespec t1, t2; | |
652 | bool Cflag = false, qflag = false, vflag = false; | |
653 | bool Pflag = false, sflag = false, lflag = false, bflag = false; | |
654 | int c, cnt, ret; | |
655 | char *buf; | |
656 | int64_t offset; | |
657 | int64_t count; | |
658 | /* Some compilers get confused and warn if this is not initialized. */ | |
659 | int64_t total = 0; | |
660 | int pattern = 0; | |
661 | int64_t pattern_offset = 0, pattern_count = 0; | |
662 | ||
663 | while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) { | |
664 | switch (c) { | |
665 | case 'b': | |
666 | bflag = true; | |
667 | break; | |
668 | case 'C': | |
669 | Cflag = true; | |
670 | break; | |
671 | case 'l': | |
672 | lflag = true; | |
673 | pattern_count = cvtnum(optarg); | |
674 | if (pattern_count < 0) { | |
675 | print_cvtnum_err(pattern_count, optarg); | |
676 | return pattern_count; | |
677 | } | |
678 | break; | |
679 | case 'p': | |
680 | /* Ignored for backwards compatibility */ | |
681 | break; | |
682 | case 'P': | |
683 | Pflag = true; | |
684 | pattern = parse_pattern(optarg); | |
685 | if (pattern < 0) { | |
686 | return -EINVAL; | |
687 | } | |
688 | break; | |
689 | case 'q': | |
690 | qflag = true; | |
691 | break; | |
692 | case 's': | |
693 | sflag = true; | |
694 | pattern_offset = cvtnum(optarg); | |
695 | if (pattern_offset < 0) { | |
696 | print_cvtnum_err(pattern_offset, optarg); | |
697 | return pattern_offset; | |
698 | } | |
699 | break; | |
700 | case 'v': | |
701 | vflag = true; | |
702 | break; | |
703 | default: | |
704 | qemuio_command_usage(&read_cmd); | |
705 | return -EINVAL; | |
706 | } | |
707 | } | |
708 | ||
709 | if (optind != argc - 2) { | |
710 | qemuio_command_usage(&read_cmd); | |
711 | return -EINVAL; | |
712 | } | |
713 | ||
714 | offset = cvtnum(argv[optind]); | |
715 | if (offset < 0) { | |
716 | print_cvtnum_err(offset, argv[optind]); | |
717 | return offset; | |
718 | } | |
719 | ||
720 | optind++; | |
721 | count = cvtnum(argv[optind]); | |
722 | if (count < 0) { | |
723 | print_cvtnum_err(count, argv[optind]); | |
724 | return count; | |
725 | } else if (count > BDRV_REQUEST_MAX_BYTES) { | |
726 | printf("length cannot exceed %" PRIu64 ", given %s\n", | |
727 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
728 | return -EINVAL; | |
729 | } | |
730 | ||
731 | if (!Pflag && (lflag || sflag)) { | |
732 | qemuio_command_usage(&read_cmd); | |
733 | return -EINVAL; | |
734 | } | |
735 | ||
736 | if (!lflag) { | |
737 | pattern_count = count - pattern_offset; | |
738 | } | |
739 | ||
740 | if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) { | |
741 | printf("pattern verification range exceeds end of read data\n"); | |
742 | return -EINVAL; | |
743 | } | |
744 | ||
745 | if (bflag) { | |
746 | if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { | |
747 | printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", | |
748 | offset); | |
749 | return -EINVAL; | |
750 | } | |
751 | if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { | |
752 | printf("%"PRId64" is not a sector-aligned value for 'count'\n", | |
753 | count); | |
754 | return -EINVAL; | |
755 | } | |
756 | } | |
757 | ||
758 | buf = qemu_io_alloc(blk, count, 0xab); | |
759 | ||
760 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
761 | if (bflag) { | |
762 | ret = do_load_vmstate(blk, buf, offset, count, &total); | |
763 | } else { | |
764 | ret = do_pread(blk, buf, offset, count, &total); | |
765 | } | |
766 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
767 | ||
768 | if (ret < 0) { | |
769 | printf("read failed: %s\n", strerror(-ret)); | |
770 | goto out; | |
771 | } | |
772 | cnt = ret; | |
773 | ||
774 | ret = 0; | |
775 | ||
776 | if (Pflag) { | |
777 | void *cmp_buf = g_malloc(pattern_count); | |
778 | memset(cmp_buf, pattern, pattern_count); | |
779 | if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) { | |
780 | printf("Pattern verification failed at offset %" | |
781 | PRId64 ", %"PRId64" bytes\n", | |
782 | offset + pattern_offset, pattern_count); | |
783 | ret = -EINVAL; | |
784 | } | |
785 | g_free(cmp_buf); | |
786 | } | |
787 | ||
788 | if (qflag) { | |
789 | goto out; | |
790 | } | |
791 | ||
792 | if (vflag) { | |
793 | dump_buffer(buf, offset, count); | |
794 | } | |
795 | ||
796 | /* Finally, report back -- -C gives a parsable format */ | |
797 | t2 = tsub(t2, t1); | |
798 | print_report("read", &t2, offset, count, total, cnt, Cflag); | |
799 | ||
800 | out: | |
801 | qemu_io_free(buf); | |
802 | return ret; | |
803 | } | |
804 | ||
805 | static void readv_help(void) | |
806 | { | |
807 | printf( | |
808 | "\n" | |
809 | " reads a range of bytes from the given offset into multiple buffers\n" | |
810 | "\n" | |
811 | " Example:\n" | |
812 | " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" | |
813 | "\n" | |
814 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
815 | " standard output stream (with -v option) for subsequent inspection.\n" | |
816 | " Uses multiple iovec buffers if more than one byte range is specified.\n" | |
817 | " -C, -- report statistics in a machine parsable format\n" | |
818 | " -P, -- use a pattern to verify read data\n" | |
819 | " -v, -- dump buffer to standard output\n" | |
820 | " -q, -- quiet mode, do not show I/O statistics\n" | |
821 | "\n"); | |
822 | } | |
823 | ||
824 | static int readv_f(BlockBackend *blk, int argc, char **argv); | |
825 | ||
826 | static const cmdinfo_t readv_cmd = { | |
827 | .name = "readv", | |
828 | .cfunc = readv_f, | |
829 | .argmin = 2, | |
830 | .argmax = -1, | |
831 | .args = "[-Cqv] [-P pattern] off len [len..]", | |
832 | .oneline = "reads a number of bytes at a specified offset", | |
833 | .help = readv_help, | |
834 | }; | |
835 | ||
836 | static int readv_f(BlockBackend *blk, int argc, char **argv) | |
837 | { | |
838 | struct timespec t1, t2; | |
839 | bool Cflag = false, qflag = false, vflag = false; | |
840 | int c, cnt, ret; | |
841 | char *buf; | |
842 | int64_t offset; | |
843 | /* Some compilers get confused and warn if this is not initialized. */ | |
844 | int total = 0; | |
845 | int nr_iov; | |
846 | QEMUIOVector qiov; | |
847 | int pattern = 0; | |
848 | bool Pflag = false; | |
849 | ||
850 | while ((c = getopt(argc, argv, "CP:qv")) != -1) { | |
851 | switch (c) { | |
852 | case 'C': | |
853 | Cflag = true; | |
854 | break; | |
855 | case 'P': | |
856 | Pflag = true; | |
857 | pattern = parse_pattern(optarg); | |
858 | if (pattern < 0) { | |
859 | return -EINVAL; | |
860 | } | |
861 | break; | |
862 | case 'q': | |
863 | qflag = true; | |
864 | break; | |
865 | case 'v': | |
866 | vflag = true; | |
867 | break; | |
868 | default: | |
869 | qemuio_command_usage(&readv_cmd); | |
870 | return -EINVAL; | |
871 | } | |
872 | } | |
873 | ||
874 | if (optind > argc - 2) { | |
875 | qemuio_command_usage(&readv_cmd); | |
876 | return -EINVAL; | |
877 | } | |
878 | ||
879 | ||
880 | offset = cvtnum(argv[optind]); | |
881 | if (offset < 0) { | |
882 | print_cvtnum_err(offset, argv[optind]); | |
883 | return offset; | |
884 | } | |
885 | optind++; | |
886 | ||
887 | nr_iov = argc - optind; | |
888 | buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab); | |
889 | if (buf == NULL) { | |
890 | return -EINVAL; | |
891 | } | |
892 | ||
893 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
894 | ret = do_aio_readv(blk, &qiov, offset, &total); | |
895 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
896 | ||
897 | if (ret < 0) { | |
898 | printf("readv failed: %s\n", strerror(-ret)); | |
899 | goto out; | |
900 | } | |
901 | cnt = ret; | |
902 | ||
903 | ret = 0; | |
904 | ||
905 | if (Pflag) { | |
906 | void *cmp_buf = g_malloc(qiov.size); | |
907 | memset(cmp_buf, pattern, qiov.size); | |
908 | if (memcmp(buf, cmp_buf, qiov.size)) { | |
909 | printf("Pattern verification failed at offset %" | |
910 | PRId64 ", %zu bytes\n", offset, qiov.size); | |
911 | ret = -EINVAL; | |
912 | } | |
913 | g_free(cmp_buf); | |
914 | } | |
915 | ||
916 | if (qflag) { | |
917 | goto out; | |
918 | } | |
919 | ||
920 | if (vflag) { | |
921 | dump_buffer(buf, offset, qiov.size); | |
922 | } | |
923 | ||
924 | /* Finally, report back -- -C gives a parsable format */ | |
925 | t2 = tsub(t2, t1); | |
926 | print_report("read", &t2, offset, qiov.size, total, cnt, Cflag); | |
927 | ||
928 | out: | |
929 | qemu_iovec_destroy(&qiov); | |
930 | qemu_io_free(buf); | |
931 | return ret; | |
932 | } | |
933 | ||
934 | static void write_help(void) | |
935 | { | |
936 | printf( | |
937 | "\n" | |
938 | " writes a range of bytes from the given offset\n" | |
939 | "\n" | |
940 | " Example:\n" | |
941 | " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n" | |
942 | "\n" | |
943 | " Writes into a segment of the currently open file, using a buffer\n" | |
944 | " filled with a set pattern (0xcdcdcdcd).\n" | |
945 | " -b, -- write to the VM state rather than the virtual disk\n" | |
946 | " -c, -- write compressed data with blk_write_compressed\n" | |
947 | " -f, -- use Force Unit Access semantics\n" | |
948 | " -n, -- with -z, don't allow slow fallback\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" | |
955 | "\n"); | |
956 | } | |
957 | ||
958 | static int write_f(BlockBackend *blk, int argc, char **argv); | |
959 | ||
960 | static const cmdinfo_t write_cmd = { | |
961 | .name = "write", | |
962 | .altname = "w", | |
963 | .cfunc = write_f, | |
964 | .perm = BLK_PERM_WRITE, | |
965 | .argmin = 2, | |
966 | .argmax = -1, | |
967 | .args = "[-bcCfnquz] [-P pattern] off len", | |
968 | .oneline = "writes a number of bytes at a specified offset", | |
969 | .help = write_help, | |
970 | }; | |
971 | ||
972 | static int write_f(BlockBackend *blk, int argc, char **argv) | |
973 | { | |
974 | struct timespec t1, t2; | |
975 | bool Cflag = false, qflag = false, bflag = false; | |
976 | bool Pflag = false, zflag = false, cflag = false; | |
977 | int flags = 0; | |
978 | int c, cnt, ret; | |
979 | char *buf = NULL; | |
980 | int64_t offset; | |
981 | int64_t count; | |
982 | /* Some compilers get confused and warn if this is not initialized. */ | |
983 | int64_t total = 0; | |
984 | int pattern = 0xcd; | |
985 | ||
986 | while ((c = getopt(argc, argv, "bcCfnpP:quz")) != -1) { | |
987 | switch (c) { | |
988 | case 'b': | |
989 | bflag = true; | |
990 | break; | |
991 | case 'c': | |
992 | cflag = true; | |
993 | break; | |
994 | case 'C': | |
995 | Cflag = true; | |
996 | break; | |
997 | case 'f': | |
998 | flags |= BDRV_REQ_FUA; | |
999 | break; | |
1000 | case 'n': | |
1001 | flags |= BDRV_REQ_NO_FALLBACK; | |
1002 | break; | |
1003 | case 'p': | |
1004 | /* Ignored for backwards compatibility */ | |
1005 | break; | |
1006 | case 'P': | |
1007 | Pflag = true; | |
1008 | pattern = parse_pattern(optarg); | |
1009 | if (pattern < 0) { | |
1010 | return -EINVAL; | |
1011 | } | |
1012 | break; | |
1013 | case 'q': | |
1014 | qflag = true; | |
1015 | break; | |
1016 | case 'u': | |
1017 | flags |= BDRV_REQ_MAY_UNMAP; | |
1018 | break; | |
1019 | case 'z': | |
1020 | zflag = true; | |
1021 | break; | |
1022 | default: | |
1023 | qemuio_command_usage(&write_cmd); | |
1024 | return -EINVAL; | |
1025 | } | |
1026 | } | |
1027 | ||
1028 | if (optind != argc - 2) { | |
1029 | qemuio_command_usage(&write_cmd); | |
1030 | return -EINVAL; | |
1031 | } | |
1032 | ||
1033 | if (bflag && zflag) { | |
1034 | printf("-b and -z cannot be specified at the same time\n"); | |
1035 | return -EINVAL; | |
1036 | } | |
1037 | ||
1038 | if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) { | |
1039 | printf("-f and -b or -c cannot be specified at the same time\n"); | |
1040 | return -EINVAL; | |
1041 | } | |
1042 | ||
1043 | if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) { | |
1044 | printf("-n requires -z to be specified\n"); | |
1045 | return -EINVAL; | |
1046 | } | |
1047 | ||
1048 | if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) { | |
1049 | printf("-u requires -z to be specified\n"); | |
1050 | return -EINVAL; | |
1051 | } | |
1052 | ||
1053 | if (zflag && Pflag) { | |
1054 | printf("-z and -P cannot be specified at the same time\n"); | |
1055 | return -EINVAL; | |
1056 | } | |
1057 | ||
1058 | offset = cvtnum(argv[optind]); | |
1059 | if (offset < 0) { | |
1060 | print_cvtnum_err(offset, argv[optind]); | |
1061 | return offset; | |
1062 | } | |
1063 | ||
1064 | optind++; | |
1065 | count = cvtnum(argv[optind]); | |
1066 | if (count < 0) { | |
1067 | print_cvtnum_err(count, argv[optind]); | |
1068 | return count; | |
1069 | } else if (count > BDRV_REQUEST_MAX_BYTES) { | |
1070 | printf("length cannot exceed %" PRIu64 ", given %s\n", | |
1071 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | ||
1075 | if (bflag || cflag) { | |
1076 | if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { | |
1077 | printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", | |
1078 | offset); | |
1079 | return -EINVAL; | |
1080 | } | |
1081 | ||
1082 | if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { | |
1083 | printf("%"PRId64" is not a sector-aligned value for 'count'\n", | |
1084 | count); | |
1085 | return -EINVAL; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | if (!zflag) { | |
1090 | buf = qemu_io_alloc(blk, count, pattern); | |
1091 | } | |
1092 | ||
1093 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
1094 | if (bflag) { | |
1095 | ret = do_save_vmstate(blk, buf, offset, count, &total); | |
1096 | } else if (zflag) { | |
1097 | ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total); | |
1098 | } else if (cflag) { | |
1099 | ret = do_write_compressed(blk, buf, offset, count, &total); | |
1100 | } else { | |
1101 | ret = do_pwrite(blk, buf, offset, count, flags, &total); | |
1102 | } | |
1103 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1104 | ||
1105 | if (ret < 0) { | |
1106 | printf("write failed: %s\n", strerror(-ret)); | |
1107 | goto out; | |
1108 | } | |
1109 | cnt = ret; | |
1110 | ||
1111 | ret = 0; | |
1112 | ||
1113 | if (qflag) { | |
1114 | goto out; | |
1115 | } | |
1116 | ||
1117 | /* Finally, report back -- -C gives a parsable format */ | |
1118 | t2 = tsub(t2, t1); | |
1119 | print_report("wrote", &t2, offset, count, total, cnt, Cflag); | |
1120 | ||
1121 | out: | |
1122 | if (!zflag) { | |
1123 | qemu_io_free(buf); | |
1124 | } | |
1125 | return ret; | |
1126 | } | |
1127 | ||
1128 | static void | |
1129 | writev_help(void) | |
1130 | { | |
1131 | printf( | |
1132 | "\n" | |
1133 | " writes a range of bytes from the given offset source from multiple buffers\n" | |
1134 | "\n" | |
1135 | " Example:\n" | |
1136 | " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" | |
1137 | "\n" | |
1138 | " Writes into a segment of the currently open file, using a buffer\n" | |
1139 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1140 | " -P, -- use different pattern to fill file\n" | |
1141 | " -C, -- report statistics in a machine parsable format\n" | |
1142 | " -f, -- use Force Unit Access semantics\n" | |
1143 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1144 | "\n"); | |
1145 | } | |
1146 | ||
1147 | static int writev_f(BlockBackend *blk, int argc, char **argv); | |
1148 | ||
1149 | static const cmdinfo_t writev_cmd = { | |
1150 | .name = "writev", | |
1151 | .cfunc = writev_f, | |
1152 | .perm = BLK_PERM_WRITE, | |
1153 | .argmin = 2, | |
1154 | .argmax = -1, | |
1155 | .args = "[-Cfq] [-P pattern] off len [len..]", | |
1156 | .oneline = "writes a number of bytes at a specified offset", | |
1157 | .help = writev_help, | |
1158 | }; | |
1159 | ||
1160 | static int writev_f(BlockBackend *blk, int argc, char **argv) | |
1161 | { | |
1162 | struct timespec t1, t2; | |
1163 | bool Cflag = false, qflag = false; | |
1164 | int flags = 0; | |
1165 | int c, cnt, ret; | |
1166 | char *buf; | |
1167 | int64_t offset; | |
1168 | /* Some compilers get confused and warn if this is not initialized. */ | |
1169 | int total = 0; | |
1170 | int nr_iov; | |
1171 | int pattern = 0xcd; | |
1172 | QEMUIOVector qiov; | |
1173 | ||
1174 | while ((c = getopt(argc, argv, "CfqP:")) != -1) { | |
1175 | switch (c) { | |
1176 | case 'C': | |
1177 | Cflag = true; | |
1178 | break; | |
1179 | case 'f': | |
1180 | flags |= BDRV_REQ_FUA; | |
1181 | break; | |
1182 | case 'q': | |
1183 | qflag = true; | |
1184 | break; | |
1185 | case 'P': | |
1186 | pattern = parse_pattern(optarg); | |
1187 | if (pattern < 0) { | |
1188 | return -EINVAL; | |
1189 | } | |
1190 | break; | |
1191 | default: | |
1192 | qemuio_command_usage(&writev_cmd); | |
1193 | return -EINVAL; | |
1194 | } | |
1195 | } | |
1196 | ||
1197 | if (optind > argc - 2) { | |
1198 | qemuio_command_usage(&writev_cmd); | |
1199 | return -EINVAL; | |
1200 | } | |
1201 | ||
1202 | offset = cvtnum(argv[optind]); | |
1203 | if (offset < 0) { | |
1204 | print_cvtnum_err(offset, argv[optind]); | |
1205 | return offset; | |
1206 | } | |
1207 | optind++; | |
1208 | ||
1209 | nr_iov = argc - optind; | |
1210 | buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern); | |
1211 | if (buf == NULL) { | |
1212 | return -EINVAL; | |
1213 | } | |
1214 | ||
1215 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
1216 | ret = do_aio_writev(blk, &qiov, offset, flags, &total); | |
1217 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1218 | ||
1219 | if (ret < 0) { | |
1220 | printf("writev failed: %s\n", strerror(-ret)); | |
1221 | goto out; | |
1222 | } | |
1223 | cnt = ret; | |
1224 | ||
1225 | ret = 0; | |
1226 | ||
1227 | if (qflag) { | |
1228 | goto out; | |
1229 | } | |
1230 | ||
1231 | /* Finally, report back -- -C gives a parsable format */ | |
1232 | t2 = tsub(t2, t1); | |
1233 | print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); | |
1234 | out: | |
1235 | qemu_iovec_destroy(&qiov); | |
1236 | qemu_io_free(buf); | |
1237 | return ret; | |
1238 | } | |
1239 | ||
1240 | struct aio_ctx { | |
1241 | BlockBackend *blk; | |
1242 | QEMUIOVector qiov; | |
1243 | int64_t offset; | |
1244 | char *buf; | |
1245 | bool qflag; | |
1246 | bool vflag; | |
1247 | bool Cflag; | |
1248 | bool Pflag; | |
1249 | bool zflag; | |
1250 | BlockAcctCookie acct; | |
1251 | int pattern; | |
1252 | struct timespec t1; | |
1253 | }; | |
1254 | ||
1255 | static void aio_write_done(void *opaque, int ret) | |
1256 | { | |
1257 | struct aio_ctx *ctx = opaque; | |
1258 | struct timespec t2; | |
1259 | ||
1260 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1261 | ||
1262 | ||
1263 | if (ret < 0) { | |
1264 | printf("aio_write failed: %s\n", strerror(-ret)); | |
1265 | block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); | |
1266 | goto out; | |
1267 | } | |
1268 | ||
1269 | block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); | |
1270 | ||
1271 | if (ctx->qflag) { | |
1272 | goto out; | |
1273 | } | |
1274 | ||
1275 | /* Finally, report back -- -C gives a parsable format */ | |
1276 | t2 = tsub(t2, ctx->t1); | |
1277 | print_report("wrote", &t2, ctx->offset, ctx->qiov.size, | |
1278 | ctx->qiov.size, 1, ctx->Cflag); | |
1279 | out: | |
1280 | if (!ctx->zflag) { | |
1281 | qemu_io_free(ctx->buf); | |
1282 | qemu_iovec_destroy(&ctx->qiov); | |
1283 | } | |
1284 | g_free(ctx); | |
1285 | } | |
1286 | ||
1287 | static void aio_read_done(void *opaque, int ret) | |
1288 | { | |
1289 | struct aio_ctx *ctx = opaque; | |
1290 | struct timespec t2; | |
1291 | ||
1292 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1293 | ||
1294 | if (ret < 0) { | |
1295 | printf("readv failed: %s\n", strerror(-ret)); | |
1296 | block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); | |
1297 | goto out; | |
1298 | } | |
1299 | ||
1300 | if (ctx->Pflag) { | |
1301 | void *cmp_buf = g_malloc(ctx->qiov.size); | |
1302 | ||
1303 | memset(cmp_buf, ctx->pattern, ctx->qiov.size); | |
1304 | if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) { | |
1305 | printf("Pattern verification failed at offset %" | |
1306 | PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size); | |
1307 | } | |
1308 | g_free(cmp_buf); | |
1309 | } | |
1310 | ||
1311 | block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); | |
1312 | ||
1313 | if (ctx->qflag) { | |
1314 | goto out; | |
1315 | } | |
1316 | ||
1317 | if (ctx->vflag) { | |
1318 | dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size); | |
1319 | } | |
1320 | ||
1321 | /* Finally, report back -- -C gives a parsable format */ | |
1322 | t2 = tsub(t2, ctx->t1); | |
1323 | print_report("read", &t2, ctx->offset, ctx->qiov.size, | |
1324 | ctx->qiov.size, 1, ctx->Cflag); | |
1325 | out: | |
1326 | qemu_io_free(ctx->buf); | |
1327 | qemu_iovec_destroy(&ctx->qiov); | |
1328 | g_free(ctx); | |
1329 | } | |
1330 | ||
1331 | static void aio_read_help(void) | |
1332 | { | |
1333 | printf( | |
1334 | "\n" | |
1335 | " asynchronously reads a range of bytes from the given offset\n" | |
1336 | "\n" | |
1337 | " Example:\n" | |
1338 | " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" | |
1339 | "\n" | |
1340 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
1341 | " standard output stream (with -v option) for subsequent inspection.\n" | |
1342 | " The read is performed asynchronously and the aio_flush command must be\n" | |
1343 | " used to ensure all outstanding aio requests have been completed.\n" | |
1344 | " Note that due to its asynchronous nature, this command will be\n" | |
1345 | " considered successful once the request is submitted, independently\n" | |
1346 | " of potential I/O errors or pattern mismatches.\n" | |
1347 | " -C, -- report statistics in a machine parsable format\n" | |
1348 | " -P, -- use a pattern to verify read data\n" | |
1349 | " -i, -- treat request as invalid, for exercising stats\n" | |
1350 | " -v, -- dump buffer to standard output\n" | |
1351 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1352 | "\n"); | |
1353 | } | |
1354 | ||
1355 | static int aio_read_f(BlockBackend *blk, int argc, char **argv); | |
1356 | ||
1357 | static const cmdinfo_t aio_read_cmd = { | |
1358 | .name = "aio_read", | |
1359 | .cfunc = aio_read_f, | |
1360 | .argmin = 2, | |
1361 | .argmax = -1, | |
1362 | .args = "[-Ciqv] [-P pattern] off len [len..]", | |
1363 | .oneline = "asynchronously reads a number of bytes", | |
1364 | .help = aio_read_help, | |
1365 | }; | |
1366 | ||
1367 | static int aio_read_f(BlockBackend *blk, int argc, char **argv) | |
1368 | { | |
1369 | int nr_iov, c; | |
1370 | struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); | |
1371 | ||
1372 | ctx->blk = blk; | |
1373 | while ((c = getopt(argc, argv, "CP:iqv")) != -1) { | |
1374 | switch (c) { | |
1375 | case 'C': | |
1376 | ctx->Cflag = true; | |
1377 | break; | |
1378 | case 'P': | |
1379 | ctx->Pflag = true; | |
1380 | ctx->pattern = parse_pattern(optarg); | |
1381 | if (ctx->pattern < 0) { | |
1382 | g_free(ctx); | |
1383 | return -EINVAL; | |
1384 | } | |
1385 | break; | |
1386 | case 'i': | |
1387 | printf("injecting invalid read request\n"); | |
1388 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); | |
1389 | g_free(ctx); | |
1390 | return 0; | |
1391 | case 'q': | |
1392 | ctx->qflag = true; | |
1393 | break; | |
1394 | case 'v': | |
1395 | ctx->vflag = true; | |
1396 | break; | |
1397 | default: | |
1398 | g_free(ctx); | |
1399 | qemuio_command_usage(&aio_read_cmd); | |
1400 | return -EINVAL; | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | if (optind > argc - 2) { | |
1405 | g_free(ctx); | |
1406 | qemuio_command_usage(&aio_read_cmd); | |
1407 | return -EINVAL; | |
1408 | } | |
1409 | ||
1410 | ctx->offset = cvtnum(argv[optind]); | |
1411 | if (ctx->offset < 0) { | |
1412 | int ret = ctx->offset; | |
1413 | print_cvtnum_err(ret, argv[optind]); | |
1414 | g_free(ctx); | |
1415 | return ret; | |
1416 | } | |
1417 | optind++; | |
1418 | ||
1419 | nr_iov = argc - optind; | |
1420 | ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab); | |
1421 | if (ctx->buf == NULL) { | |
1422 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); | |
1423 | g_free(ctx); | |
1424 | return -EINVAL; | |
1425 | } | |
1426 | ||
1427 | clock_gettime(CLOCK_MONOTONIC, &ctx->t1); | |
1428 | block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, | |
1429 | BLOCK_ACCT_READ); | |
1430 | blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx); | |
1431 | return 0; | |
1432 | } | |
1433 | ||
1434 | static void aio_write_help(void) | |
1435 | { | |
1436 | printf( | |
1437 | "\n" | |
1438 | " asynchronously writes a range of bytes from the given offset source\n" | |
1439 | " from multiple buffers\n" | |
1440 | "\n" | |
1441 | " Example:\n" | |
1442 | " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" | |
1443 | "\n" | |
1444 | " Writes into a segment of the currently open file, using a buffer\n" | |
1445 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1446 | " The write is performed asynchronously and the aio_flush command must be\n" | |
1447 | " used to ensure all outstanding aio requests have been completed.\n" | |
1448 | " Note that due to its asynchronous nature, this command will be\n" | |
1449 | " considered successful once the request is submitted, independently\n" | |
1450 | " of potential I/O errors or pattern mismatches.\n" | |
1451 | " -P, -- use different pattern to fill file\n" | |
1452 | " -C, -- report statistics in a machine parsable format\n" | |
1453 | " -f, -- use Force Unit Access semantics\n" | |
1454 | " -i, -- treat request as invalid, for exercising stats\n" | |
1455 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1456 | " -u, -- with -z, allow unmapping\n" | |
1457 | " -z, -- write zeroes using blk_aio_pwrite_zeroes\n" | |
1458 | "\n"); | |
1459 | } | |
1460 | ||
1461 | static int aio_write_f(BlockBackend *blk, int argc, char **argv); | |
1462 | ||
1463 | static const cmdinfo_t aio_write_cmd = { | |
1464 | .name = "aio_write", | |
1465 | .cfunc = aio_write_f, | |
1466 | .perm = BLK_PERM_WRITE, | |
1467 | .argmin = 2, | |
1468 | .argmax = -1, | |
1469 | .args = "[-Cfiquz] [-P pattern] off len [len..]", | |
1470 | .oneline = "asynchronously writes a number of bytes", | |
1471 | .help = aio_write_help, | |
1472 | }; | |
1473 | ||
1474 | static int aio_write_f(BlockBackend *blk, int argc, char **argv) | |
1475 | { | |
1476 | int nr_iov, c; | |
1477 | int pattern = 0xcd; | |
1478 | struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); | |
1479 | int flags = 0; | |
1480 | ||
1481 | ctx->blk = blk; | |
1482 | while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) { | |
1483 | switch (c) { | |
1484 | case 'C': | |
1485 | ctx->Cflag = true; | |
1486 | break; | |
1487 | case 'f': | |
1488 | flags |= BDRV_REQ_FUA; | |
1489 | break; | |
1490 | case 'q': | |
1491 | ctx->qflag = true; | |
1492 | break; | |
1493 | case 'u': | |
1494 | flags |= BDRV_REQ_MAY_UNMAP; | |
1495 | break; | |
1496 | case 'P': | |
1497 | pattern = parse_pattern(optarg); | |
1498 | if (pattern < 0) { | |
1499 | g_free(ctx); | |
1500 | return -EINVAL; | |
1501 | } | |
1502 | break; | |
1503 | case 'i': | |
1504 | printf("injecting invalid write request\n"); | |
1505 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); | |
1506 | g_free(ctx); | |
1507 | return 0; | |
1508 | case 'z': | |
1509 | ctx->zflag = true; | |
1510 | break; | |
1511 | default: | |
1512 | g_free(ctx); | |
1513 | qemuio_command_usage(&aio_write_cmd); | |
1514 | return -EINVAL; | |
1515 | } | |
1516 | } | |
1517 | ||
1518 | if (optind > argc - 2) { | |
1519 | g_free(ctx); | |
1520 | qemuio_command_usage(&aio_write_cmd); | |
1521 | return -EINVAL; | |
1522 | } | |
1523 | ||
1524 | if (ctx->zflag && optind != argc - 2) { | |
1525 | printf("-z supports only a single length parameter\n"); | |
1526 | g_free(ctx); | |
1527 | return -EINVAL; | |
1528 | } | |
1529 | ||
1530 | if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) { | |
1531 | printf("-u requires -z to be specified\n"); | |
1532 | g_free(ctx); | |
1533 | return -EINVAL; | |
1534 | } | |
1535 | ||
1536 | if (ctx->zflag && ctx->Pflag) { | |
1537 | printf("-z and -P cannot be specified at the same time\n"); | |
1538 | g_free(ctx); | |
1539 | return -EINVAL; | |
1540 | } | |
1541 | ||
1542 | ctx->offset = cvtnum(argv[optind]); | |
1543 | if (ctx->offset < 0) { | |
1544 | int ret = ctx->offset; | |
1545 | print_cvtnum_err(ret, argv[optind]); | |
1546 | g_free(ctx); | |
1547 | return ret; | |
1548 | } | |
1549 | optind++; | |
1550 | ||
1551 | if (ctx->zflag) { | |
1552 | int64_t count = cvtnum(argv[optind]); | |
1553 | if (count < 0) { | |
1554 | print_cvtnum_err(count, argv[optind]); | |
1555 | g_free(ctx); | |
1556 | return count; | |
1557 | } | |
1558 | ||
1559 | ctx->qiov.size = count; | |
1560 | blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done, | |
1561 | ctx); | |
1562 | } else { | |
1563 | nr_iov = argc - optind; | |
1564 | ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, | |
1565 | pattern); | |
1566 | if (ctx->buf == NULL) { | |
1567 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); | |
1568 | g_free(ctx); | |
1569 | return -EINVAL; | |
1570 | } | |
1571 | ||
1572 | clock_gettime(CLOCK_MONOTONIC, &ctx->t1); | |
1573 | block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, | |
1574 | BLOCK_ACCT_WRITE); | |
1575 | ||
1576 | blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done, | |
1577 | ctx); | |
1578 | } | |
1579 | ||
1580 | return 0; | |
1581 | } | |
1582 | ||
1583 | static int aio_flush_f(BlockBackend *blk, int argc, char **argv) | |
1584 | { | |
1585 | BlockAcctCookie cookie; | |
1586 | block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH); | |
1587 | blk_drain_all(); | |
1588 | block_acct_done(blk_get_stats(blk), &cookie); | |
1589 | return 0; | |
1590 | } | |
1591 | ||
1592 | static const cmdinfo_t aio_flush_cmd = { | |
1593 | .name = "aio_flush", | |
1594 | .cfunc = aio_flush_f, | |
1595 | .oneline = "completes all outstanding aio requests" | |
1596 | }; | |
1597 | ||
1598 | static int flush_f(BlockBackend *blk, int argc, char **argv) | |
1599 | { | |
1600 | return blk_flush(blk); | |
1601 | } | |
1602 | ||
1603 | static const cmdinfo_t flush_cmd = { | |
1604 | .name = "flush", | |
1605 | .altname = "f", | |
1606 | .cfunc = flush_f, | |
1607 | .oneline = "flush all in-core file state to disk", | |
1608 | }; | |
1609 | ||
1610 | static int truncate_f(BlockBackend *blk, int argc, char **argv) | |
1611 | { | |
1612 | Error *local_err = NULL; | |
1613 | int64_t offset; | |
1614 | int ret; | |
1615 | ||
1616 | offset = cvtnum(argv[1]); | |
1617 | if (offset < 0) { | |
1618 | print_cvtnum_err(offset, argv[1]); | |
1619 | return offset; | |
1620 | } | |
1621 | ||
1622 | ret = blk_truncate(blk, offset, PREALLOC_MODE_OFF, &local_err); | |
1623 | if (ret < 0) { | |
1624 | error_report_err(local_err); | |
1625 | return ret; | |
1626 | } | |
1627 | ||
1628 | return 0; | |
1629 | } | |
1630 | ||
1631 | static const cmdinfo_t truncate_cmd = { | |
1632 | .name = "truncate", | |
1633 | .altname = "t", | |
1634 | .cfunc = truncate_f, | |
1635 | .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE, | |
1636 | .argmin = 1, | |
1637 | .argmax = 1, | |
1638 | .args = "off", | |
1639 | .oneline = "truncates the current file at the given offset", | |
1640 | }; | |
1641 | ||
1642 | static int length_f(BlockBackend *blk, int argc, char **argv) | |
1643 | { | |
1644 | int64_t size; | |
1645 | char s1[64]; | |
1646 | ||
1647 | size = blk_getlength(blk); | |
1648 | if (size < 0) { | |
1649 | printf("getlength: %s\n", strerror(-size)); | |
1650 | return size; | |
1651 | } | |
1652 | ||
1653 | cvtstr(size, s1, sizeof(s1)); | |
1654 | printf("%s\n", s1); | |
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | ||
1659 | static const cmdinfo_t length_cmd = { | |
1660 | .name = "length", | |
1661 | .altname = "l", | |
1662 | .cfunc = length_f, | |
1663 | .oneline = "gets the length of the current file", | |
1664 | }; | |
1665 | ||
1666 | ||
1667 | static int info_f(BlockBackend *blk, int argc, char **argv) | |
1668 | { | |
1669 | BlockDriverState *bs = blk_bs(blk); | |
1670 | BlockDriverInfo bdi; | |
1671 | ImageInfoSpecific *spec_info; | |
1672 | Error *local_err = NULL; | |
1673 | char s1[64], s2[64]; | |
1674 | int ret; | |
1675 | ||
1676 | if (bs->drv && bs->drv->format_name) { | |
1677 | printf("format name: %s\n", bs->drv->format_name); | |
1678 | } | |
1679 | if (bs->drv && bs->drv->protocol_name) { | |
1680 | printf("format name: %s\n", bs->drv->protocol_name); | |
1681 | } | |
1682 | ||
1683 | ret = bdrv_get_info(bs, &bdi); | |
1684 | if (ret) { | |
1685 | return ret; | |
1686 | } | |
1687 | ||
1688 | cvtstr(bdi.cluster_size, s1, sizeof(s1)); | |
1689 | cvtstr(bdi.vm_state_offset, s2, sizeof(s2)); | |
1690 | ||
1691 | printf("cluster size: %s\n", s1); | |
1692 | printf("vm state offset: %s\n", s2); | |
1693 | ||
1694 | spec_info = bdrv_get_specific_info(bs, &local_err); | |
1695 | if (local_err) { | |
1696 | error_report_err(local_err); | |
1697 | return -EIO; | |
1698 | } | |
1699 | if (spec_info) { | |
1700 | printf("Format specific information:\n"); | |
1701 | bdrv_image_info_specific_dump(spec_info); | |
1702 | qapi_free_ImageInfoSpecific(spec_info); | |
1703 | } | |
1704 | ||
1705 | return 0; | |
1706 | } | |
1707 | ||
1708 | ||
1709 | ||
1710 | static const cmdinfo_t info_cmd = { | |
1711 | .name = "info", | |
1712 | .altname = "i", | |
1713 | .cfunc = info_f, | |
1714 | .oneline = "prints information about the current file", | |
1715 | }; | |
1716 | ||
1717 | static void discard_help(void) | |
1718 | { | |
1719 | printf( | |
1720 | "\n" | |
1721 | " discards a range of bytes from the given offset\n" | |
1722 | "\n" | |
1723 | " Example:\n" | |
1724 | " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n" | |
1725 | "\n" | |
1726 | " Discards a segment of the currently open file.\n" | |
1727 | " -C, -- report statistics in a machine parsable format\n" | |
1728 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1729 | "\n"); | |
1730 | } | |
1731 | ||
1732 | static int discard_f(BlockBackend *blk, int argc, char **argv); | |
1733 | ||
1734 | static const cmdinfo_t discard_cmd = { | |
1735 | .name = "discard", | |
1736 | .altname = "d", | |
1737 | .cfunc = discard_f, | |
1738 | .perm = BLK_PERM_WRITE, | |
1739 | .argmin = 2, | |
1740 | .argmax = -1, | |
1741 | .args = "[-Cq] off len", | |
1742 | .oneline = "discards a number of bytes at a specified offset", | |
1743 | .help = discard_help, | |
1744 | }; | |
1745 | ||
1746 | static int discard_f(BlockBackend *blk, int argc, char **argv) | |
1747 | { | |
1748 | struct timespec t1, t2; | |
1749 | bool Cflag = false, qflag = false; | |
1750 | int c, ret; | |
1751 | int64_t offset, bytes; | |
1752 | ||
1753 | while ((c = getopt(argc, argv, "Cq")) != -1) { | |
1754 | switch (c) { | |
1755 | case 'C': | |
1756 | Cflag = true; | |
1757 | break; | |
1758 | case 'q': | |
1759 | qflag = true; | |
1760 | break; | |
1761 | default: | |
1762 | qemuio_command_usage(&discard_cmd); | |
1763 | return -EINVAL; | |
1764 | } | |
1765 | } | |
1766 | ||
1767 | if (optind != argc - 2) { | |
1768 | qemuio_command_usage(&discard_cmd); | |
1769 | return -EINVAL; | |
1770 | } | |
1771 | ||
1772 | offset = cvtnum(argv[optind]); | |
1773 | if (offset < 0) { | |
1774 | print_cvtnum_err(offset, argv[optind]); | |
1775 | return offset; | |
1776 | } | |
1777 | ||
1778 | optind++; | |
1779 | bytes = cvtnum(argv[optind]); | |
1780 | if (bytes < 0) { | |
1781 | print_cvtnum_err(bytes, argv[optind]); | |
1782 | return bytes; | |
1783 | } else if (bytes > BDRV_REQUEST_MAX_BYTES) { | |
1784 | printf("length cannot exceed %"PRIu64", given %s\n", | |
1785 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
1786 | return -EINVAL; | |
1787 | } | |
1788 | ||
1789 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
1790 | ret = blk_pdiscard(blk, offset, bytes); | |
1791 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1792 | ||
1793 | if (ret < 0) { | |
1794 | printf("discard failed: %s\n", strerror(-ret)); | |
1795 | return ret; | |
1796 | } | |
1797 | ||
1798 | /* Finally, report back -- -C gives a parsable format */ | |
1799 | if (!qflag) { | |
1800 | t2 = tsub(t2, t1); | |
1801 | print_report("discard", &t2, offset, bytes, bytes, 1, Cflag); | |
1802 | } | |
1803 | ||
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | static int alloc_f(BlockBackend *blk, int argc, char **argv) | |
1808 | { | |
1809 | BlockDriverState *bs = blk_bs(blk); | |
1810 | int64_t offset, start, remaining, count; | |
1811 | char s1[64]; | |
1812 | int ret; | |
1813 | int64_t num, sum_alloc; | |
1814 | ||
1815 | start = offset = cvtnum(argv[1]); | |
1816 | if (offset < 0) { | |
1817 | print_cvtnum_err(offset, argv[1]); | |
1818 | return offset; | |
1819 | } | |
1820 | ||
1821 | if (argc == 3) { | |
1822 | count = cvtnum(argv[2]); | |
1823 | if (count < 0) { | |
1824 | print_cvtnum_err(count, argv[2]); | |
1825 | return count; | |
1826 | } | |
1827 | } else { | |
1828 | count = BDRV_SECTOR_SIZE; | |
1829 | } | |
1830 | ||
1831 | remaining = count; | |
1832 | sum_alloc = 0; | |
1833 | while (remaining) { | |
1834 | ret = bdrv_is_allocated(bs, offset, remaining, &num); | |
1835 | if (ret < 0) { | |
1836 | printf("is_allocated failed: %s\n", strerror(-ret)); | |
1837 | return ret; | |
1838 | } | |
1839 | offset += num; | |
1840 | remaining -= num; | |
1841 | if (ret) { | |
1842 | sum_alloc += num; | |
1843 | } | |
1844 | if (num == 0) { | |
1845 | count -= remaining; | |
1846 | remaining = 0; | |
1847 | } | |
1848 | } | |
1849 | ||
1850 | cvtstr(start, s1, sizeof(s1)); | |
1851 | ||
1852 | printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n", | |
1853 | sum_alloc, count, s1); | |
1854 | return 0; | |
1855 | } | |
1856 | ||
1857 | static const cmdinfo_t alloc_cmd = { | |
1858 | .name = "alloc", | |
1859 | .altname = "a", | |
1860 | .argmin = 1, | |
1861 | .argmax = 2, | |
1862 | .cfunc = alloc_f, | |
1863 | .args = "offset [count]", | |
1864 | .oneline = "checks if offset is allocated in the file", | |
1865 | }; | |
1866 | ||
1867 | ||
1868 | static int map_is_allocated(BlockDriverState *bs, int64_t offset, | |
1869 | int64_t bytes, int64_t *pnum) | |
1870 | { | |
1871 | int64_t num; | |
1872 | int num_checked; | |
1873 | int ret, firstret; | |
1874 | ||
1875 | num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES); | |
1876 | ret = bdrv_is_allocated(bs, offset, num_checked, &num); | |
1877 | if (ret < 0) { | |
1878 | return ret; | |
1879 | } | |
1880 | ||
1881 | firstret = ret; | |
1882 | *pnum = num; | |
1883 | ||
1884 | while (bytes > 0 && ret == firstret) { | |
1885 | offset += num; | |
1886 | bytes -= num; | |
1887 | ||
1888 | num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES); | |
1889 | ret = bdrv_is_allocated(bs, offset, num_checked, &num); | |
1890 | if (ret == firstret && num) { | |
1891 | *pnum += num; | |
1892 | } else { | |
1893 | break; | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | return firstret; | |
1898 | } | |
1899 | ||
1900 | static int map_f(BlockBackend *blk, int argc, char **argv) | |
1901 | { | |
1902 | int64_t offset, bytes; | |
1903 | char s1[64], s2[64]; | |
1904 | int64_t num; | |
1905 | int ret; | |
1906 | const char *retstr; | |
1907 | ||
1908 | offset = 0; | |
1909 | bytes = blk_getlength(blk); | |
1910 | if (bytes < 0) { | |
1911 | error_report("Failed to query image length: %s", strerror(-bytes)); | |
1912 | return bytes; | |
1913 | } | |
1914 | ||
1915 | while (bytes) { | |
1916 | ret = map_is_allocated(blk_bs(blk), offset, bytes, &num); | |
1917 | if (ret < 0) { | |
1918 | error_report("Failed to get allocation status: %s", strerror(-ret)); | |
1919 | return ret; | |
1920 | } else if (!num) { | |
1921 | error_report("Unexpected end of image"); | |
1922 | return -EIO; | |
1923 | } | |
1924 | ||
1925 | retstr = ret ? " allocated" : "not allocated"; | |
1926 | cvtstr(num, s1, sizeof(s1)); | |
1927 | cvtstr(offset, s2, sizeof(s2)); | |
1928 | printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n", | |
1929 | s1, num, retstr, s2, offset); | |
1930 | ||
1931 | offset += num; | |
1932 | bytes -= num; | |
1933 | } | |
1934 | ||
1935 | return 0; | |
1936 | } | |
1937 | ||
1938 | static const cmdinfo_t map_cmd = { | |
1939 | .name = "map", | |
1940 | .argmin = 0, | |
1941 | .argmax = 0, | |
1942 | .cfunc = map_f, | |
1943 | .args = "", | |
1944 | .oneline = "prints the allocated areas of a file", | |
1945 | }; | |
1946 | ||
1947 | static void reopen_help(void) | |
1948 | { | |
1949 | printf( | |
1950 | "\n" | |
1951 | " Changes the open options of an already opened image\n" | |
1952 | "\n" | |
1953 | " Example:\n" | |
1954 | " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n" | |
1955 | "\n" | |
1956 | " -r, -- Reopen the image read-only\n" | |
1957 | " -w, -- Reopen the image read-write\n" | |
1958 | " -c, -- Change the cache mode to the given value\n" | |
1959 | " -o, -- Changes block driver options (cf. 'open' command)\n" | |
1960 | "\n"); | |
1961 | } | |
1962 | ||
1963 | static int reopen_f(BlockBackend *blk, int argc, char **argv); | |
1964 | ||
1965 | static QemuOptsList reopen_opts = { | |
1966 | .name = "reopen", | |
1967 | .merge_lists = true, | |
1968 | .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head), | |
1969 | .desc = { | |
1970 | /* no elements => accept any params */ | |
1971 | { /* end of list */ } | |
1972 | }, | |
1973 | }; | |
1974 | ||
1975 | static const cmdinfo_t reopen_cmd = { | |
1976 | .name = "reopen", | |
1977 | .argmin = 0, | |
1978 | .argmax = -1, | |
1979 | .cfunc = reopen_f, | |
1980 | .args = "[(-r|-w)] [-c cache] [-o options]", | |
1981 | .oneline = "reopens an image with new options", | |
1982 | .help = reopen_help, | |
1983 | }; | |
1984 | ||
1985 | static int reopen_f(BlockBackend *blk, int argc, char **argv) | |
1986 | { | |
1987 | BlockDriverState *bs = blk_bs(blk); | |
1988 | QemuOpts *qopts; | |
1989 | QDict *opts; | |
1990 | int c; | |
1991 | int flags = bs->open_flags; | |
1992 | bool writethrough = !blk_enable_write_cache(blk); | |
1993 | bool has_rw_option = false; | |
1994 | bool has_cache_option = false; | |
1995 | ||
1996 | BlockReopenQueue *brq; | |
1997 | Error *local_err = NULL; | |
1998 | ||
1999 | while ((c = getopt(argc, argv, "c:o:rw")) != -1) { | |
2000 | switch (c) { | |
2001 | case 'c': | |
2002 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) { | |
2003 | error_report("Invalid cache option: %s", optarg); | |
2004 | return -EINVAL; | |
2005 | } | |
2006 | has_cache_option = true; | |
2007 | break; | |
2008 | case 'o': | |
2009 | if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) { | |
2010 | qemu_opts_reset(&reopen_opts); | |
2011 | return -EINVAL; | |
2012 | } | |
2013 | break; | |
2014 | case 'r': | |
2015 | if (has_rw_option) { | |
2016 | error_report("Only one -r/-w option may be given"); | |
2017 | return -EINVAL; | |
2018 | } | |
2019 | flags &= ~BDRV_O_RDWR; | |
2020 | has_rw_option = true; | |
2021 | break; | |
2022 | case 'w': | |
2023 | if (has_rw_option) { | |
2024 | error_report("Only one -r/-w option may be given"); | |
2025 | return -EINVAL; | |
2026 | } | |
2027 | flags |= BDRV_O_RDWR; | |
2028 | has_rw_option = true; | |
2029 | break; | |
2030 | default: | |
2031 | qemu_opts_reset(&reopen_opts); | |
2032 | qemuio_command_usage(&reopen_cmd); | |
2033 | return -EINVAL; | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | if (optind != argc) { | |
2038 | qemu_opts_reset(&reopen_opts); | |
2039 | qemuio_command_usage(&reopen_cmd); | |
2040 | return -EINVAL; | |
2041 | } | |
2042 | ||
2043 | if (!writethrough != blk_enable_write_cache(blk) && | |
2044 | blk_get_attached_dev(blk)) | |
2045 | { | |
2046 | error_report("Cannot change cache.writeback: Device attached"); | |
2047 | qemu_opts_reset(&reopen_opts); | |
2048 | return -EBUSY; | |
2049 | } | |
2050 | ||
2051 | if (!(flags & BDRV_O_RDWR)) { | |
2052 | uint64_t orig_perm, orig_shared_perm; | |
2053 | ||
2054 | bdrv_drain(bs); | |
2055 | ||
2056 | blk_get_perm(blk, &orig_perm, &orig_shared_perm); | |
2057 | blk_set_perm(blk, | |
2058 | orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED), | |
2059 | orig_shared_perm, | |
2060 | &error_abort); | |
2061 | } | |
2062 | ||
2063 | qopts = qemu_opts_find(&reopen_opts, NULL); | |
2064 | opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new(); | |
2065 | qemu_opts_reset(&reopen_opts); | |
2066 | ||
2067 | if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) { | |
2068 | if (has_rw_option) { | |
2069 | error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'"); | |
2070 | qobject_unref(opts); | |
2071 | return -EINVAL; | |
2072 | } | |
2073 | } else { | |
2074 | qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR)); | |
2075 | } | |
2076 | ||
2077 | if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) || | |
2078 | qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) { | |
2079 | if (has_cache_option) { | |
2080 | error_report("Cannot set both -c and the cache options"); | |
2081 | qobject_unref(opts); | |
2082 | return -EINVAL; | |
2083 | } | |
2084 | } else { | |
2085 | qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE); | |
2086 | qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH); | |
2087 | } | |
2088 | ||
2089 | bdrv_subtree_drained_begin(bs); | |
2090 | brq = bdrv_reopen_queue(NULL, bs, opts, true); | |
2091 | bdrv_reopen_multiple(brq, &local_err); | |
2092 | bdrv_subtree_drained_end(bs); | |
2093 | ||
2094 | if (local_err) { | |
2095 | error_report_err(local_err); | |
2096 | return -EINVAL; | |
2097 | } | |
2098 | ||
2099 | blk_set_enable_write_cache(blk, !writethrough); | |
2100 | return 0; | |
2101 | } | |
2102 | ||
2103 | static int break_f(BlockBackend *blk, int argc, char **argv) | |
2104 | { | |
2105 | int ret; | |
2106 | ||
2107 | ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]); | |
2108 | if (ret < 0) { | |
2109 | printf("Could not set breakpoint: %s\n", strerror(-ret)); | |
2110 | return ret; | |
2111 | } | |
2112 | ||
2113 | return 0; | |
2114 | } | |
2115 | ||
2116 | static int remove_break_f(BlockBackend *blk, int argc, char **argv) | |
2117 | { | |
2118 | int ret; | |
2119 | ||
2120 | ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]); | |
2121 | if (ret < 0) { | |
2122 | printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret)); | |
2123 | return ret; | |
2124 | } | |
2125 | ||
2126 | return 0; | |
2127 | } | |
2128 | ||
2129 | static const cmdinfo_t break_cmd = { | |
2130 | .name = "break", | |
2131 | .argmin = 2, | |
2132 | .argmax = 2, | |
2133 | .cfunc = break_f, | |
2134 | .args = "event tag", | |
2135 | .oneline = "sets a breakpoint on event and tags the stopped " | |
2136 | "request as tag", | |
2137 | }; | |
2138 | ||
2139 | static const cmdinfo_t remove_break_cmd = { | |
2140 | .name = "remove_break", | |
2141 | .argmin = 1, | |
2142 | .argmax = 1, | |
2143 | .cfunc = remove_break_f, | |
2144 | .args = "tag", | |
2145 | .oneline = "remove a breakpoint by tag", | |
2146 | }; | |
2147 | ||
2148 | static int resume_f(BlockBackend *blk, int argc, char **argv) | |
2149 | { | |
2150 | int ret; | |
2151 | ||
2152 | ret = bdrv_debug_resume(blk_bs(blk), argv[1]); | |
2153 | if (ret < 0) { | |
2154 | printf("Could not resume request: %s\n", strerror(-ret)); | |
2155 | return ret; | |
2156 | } | |
2157 | ||
2158 | return 0; | |
2159 | } | |
2160 | ||
2161 | static const cmdinfo_t resume_cmd = { | |
2162 | .name = "resume", | |
2163 | .argmin = 1, | |
2164 | .argmax = 1, | |
2165 | .cfunc = resume_f, | |
2166 | .args = "tag", | |
2167 | .oneline = "resumes the request tagged as tag", | |
2168 | }; | |
2169 | ||
2170 | static int wait_break_f(BlockBackend *blk, int argc, char **argv) | |
2171 | { | |
2172 | while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) { | |
2173 | aio_poll(blk_get_aio_context(blk), true); | |
2174 | } | |
2175 | return 0; | |
2176 | } | |
2177 | ||
2178 | static const cmdinfo_t wait_break_cmd = { | |
2179 | .name = "wait_break", | |
2180 | .argmin = 1, | |
2181 | .argmax = 1, | |
2182 | .cfunc = wait_break_f, | |
2183 | .args = "tag", | |
2184 | .oneline = "waits for the suspension of a request", | |
2185 | }; | |
2186 | ||
2187 | static int abort_f(BlockBackend *blk, int argc, char **argv) | |
2188 | { | |
2189 | abort(); | |
2190 | } | |
2191 | ||
2192 | static const cmdinfo_t abort_cmd = { | |
2193 | .name = "abort", | |
2194 | .cfunc = abort_f, | |
2195 | .flags = CMD_NOFILE_OK, | |
2196 | .oneline = "simulate a program crash using abort(3)", | |
2197 | }; | |
2198 | ||
2199 | static void sigraise_help(void) | |
2200 | { | |
2201 | printf( | |
2202 | "\n" | |
2203 | " raises the given signal\n" | |
2204 | "\n" | |
2205 | " Example:\n" | |
2206 | " 'sigraise %i' - raises SIGTERM\n" | |
2207 | "\n" | |
2208 | " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n" | |
2209 | " given to sigraise.\n" | |
2210 | "\n", SIGTERM); | |
2211 | } | |
2212 | ||
2213 | static int sigraise_f(BlockBackend *blk, int argc, char **argv); | |
2214 | ||
2215 | static const cmdinfo_t sigraise_cmd = { | |
2216 | .name = "sigraise", | |
2217 | .cfunc = sigraise_f, | |
2218 | .argmin = 1, | |
2219 | .argmax = 1, | |
2220 | .flags = CMD_NOFILE_OK, | |
2221 | .args = "signal", | |
2222 | .oneline = "raises a signal", | |
2223 | .help = sigraise_help, | |
2224 | }; | |
2225 | ||
2226 | static int sigraise_f(BlockBackend *blk, int argc, char **argv) | |
2227 | { | |
2228 | int64_t sig = cvtnum(argv[1]); | |
2229 | if (sig < 0) { | |
2230 | print_cvtnum_err(sig, argv[1]); | |
2231 | return sig; | |
2232 | } else if (sig > NSIG) { | |
2233 | printf("signal argument '%s' is too large to be a valid signal\n", | |
2234 | argv[1]); | |
2235 | return -EINVAL; | |
2236 | } | |
2237 | ||
2238 | /* Using raise() to kill this process does not necessarily flush all open | |
2239 | * streams. At least stdout and stderr (although the latter should be | |
2240 | * non-buffered anyway) should be flushed, though. */ | |
2241 | fflush(stdout); | |
2242 | fflush(stderr); | |
2243 | ||
2244 | raise(sig); | |
2245 | ||
2246 | return 0; | |
2247 | } | |
2248 | ||
2249 | static void sleep_cb(void *opaque) | |
2250 | { | |
2251 | bool *expired = opaque; | |
2252 | *expired = true; | |
2253 | } | |
2254 | ||
2255 | static int sleep_f(BlockBackend *blk, int argc, char **argv) | |
2256 | { | |
2257 | char *endptr; | |
2258 | long ms; | |
2259 | struct QEMUTimer *timer; | |
2260 | bool expired = false; | |
2261 | ||
2262 | ms = strtol(argv[1], &endptr, 0); | |
2263 | if (ms < 0 || *endptr != '\0') { | |
2264 | printf("%s is not a valid number\n", argv[1]); | |
2265 | return -EINVAL; | |
2266 | } | |
2267 | ||
2268 | timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired); | |
2269 | timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms); | |
2270 | ||
2271 | while (!expired) { | |
2272 | main_loop_wait(false); | |
2273 | } | |
2274 | ||
2275 | timer_free(timer); | |
2276 | return 0; | |
2277 | } | |
2278 | ||
2279 | static const cmdinfo_t sleep_cmd = { | |
2280 | .name = "sleep", | |
2281 | .argmin = 1, | |
2282 | .argmax = 1, | |
2283 | .cfunc = sleep_f, | |
2284 | .flags = CMD_NOFILE_OK, | |
2285 | .oneline = "waits for the given value in milliseconds", | |
2286 | }; | |
2287 | ||
2288 | static void help_oneline(const char *cmd, const cmdinfo_t *ct) | |
2289 | { | |
2290 | if (cmd) { | |
2291 | printf("%s ", cmd); | |
2292 | } else { | |
2293 | printf("%s ", ct->name); | |
2294 | if (ct->altname) { | |
2295 | printf("(or %s) ", ct->altname); | |
2296 | } | |
2297 | } | |
2298 | ||
2299 | if (ct->args) { | |
2300 | printf("%s ", ct->args); | |
2301 | } | |
2302 | printf("-- %s\n", ct->oneline); | |
2303 | } | |
2304 | ||
2305 | static void help_onecmd(const char *cmd, const cmdinfo_t *ct) | |
2306 | { | |
2307 | help_oneline(cmd, ct); | |
2308 | if (ct->help) { | |
2309 | ct->help(); | |
2310 | } | |
2311 | } | |
2312 | ||
2313 | static void help_all(void) | |
2314 | { | |
2315 | const cmdinfo_t *ct; | |
2316 | ||
2317 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
2318 | help_oneline(ct->name, ct); | |
2319 | } | |
2320 | printf("\nUse 'help commandname' for extended help.\n"); | |
2321 | } | |
2322 | ||
2323 | static int help_f(BlockBackend *blk, int argc, char **argv) | |
2324 | { | |
2325 | const cmdinfo_t *ct; | |
2326 | ||
2327 | if (argc == 1) { | |
2328 | help_all(); | |
2329 | return 0; | |
2330 | } | |
2331 | ||
2332 | ct = find_command(argv[1]); | |
2333 | if (ct == NULL) { | |
2334 | printf("command %s not found\n", argv[1]); | |
2335 | return -EINVAL; | |
2336 | } | |
2337 | ||
2338 | help_onecmd(argv[1], ct); | |
2339 | return 0; | |
2340 | } | |
2341 | ||
2342 | static const cmdinfo_t help_cmd = { | |
2343 | .name = "help", | |
2344 | .altname = "?", | |
2345 | .cfunc = help_f, | |
2346 | .argmin = 0, | |
2347 | .argmax = 1, | |
2348 | .flags = CMD_FLAG_GLOBAL, | |
2349 | .args = "[command]", | |
2350 | .oneline = "help for one or all commands", | |
2351 | }; | |
2352 | ||
2353 | int qemuio_command(BlockBackend *blk, const char *cmd) | |
2354 | { | |
2355 | AioContext *ctx; | |
2356 | char *input; | |
2357 | const cmdinfo_t *ct; | |
2358 | char **v; | |
2359 | int c; | |
2360 | int ret = 0; | |
2361 | ||
2362 | input = g_strdup(cmd); | |
2363 | v = breakline(input, &c); | |
2364 | if (c) { | |
2365 | ct = find_command(v[0]); | |
2366 | if (ct) { | |
2367 | ctx = blk ? blk_get_aio_context(blk) : qemu_get_aio_context(); | |
2368 | aio_context_acquire(ctx); | |
2369 | ret = command(blk, ct, c, v); | |
2370 | aio_context_release(ctx); | |
2371 | } else { | |
2372 | fprintf(stderr, "command \"%s\" not found\n", v[0]); | |
2373 | ret = -EINVAL; | |
2374 | } | |
2375 | } | |
2376 | g_free(input); | |
2377 | g_free(v); | |
2378 | ||
2379 | return ret; | |
2380 | } | |
2381 | ||
2382 | static void __attribute((constructor)) init_qemuio_commands(void) | |
2383 | { | |
2384 | /* initialize commands */ | |
2385 | qemuio_add_command(&help_cmd); | |
2386 | qemuio_add_command(&read_cmd); | |
2387 | qemuio_add_command(&readv_cmd); | |
2388 | qemuio_add_command(&write_cmd); | |
2389 | qemuio_add_command(&writev_cmd); | |
2390 | qemuio_add_command(&aio_read_cmd); | |
2391 | qemuio_add_command(&aio_write_cmd); | |
2392 | qemuio_add_command(&aio_flush_cmd); | |
2393 | qemuio_add_command(&flush_cmd); | |
2394 | qemuio_add_command(&truncate_cmd); | |
2395 | qemuio_add_command(&length_cmd); | |
2396 | qemuio_add_command(&info_cmd); | |
2397 | qemuio_add_command(&discard_cmd); | |
2398 | qemuio_add_command(&alloc_cmd); | |
2399 | qemuio_add_command(&map_cmd); | |
2400 | qemuio_add_command(&reopen_cmd); | |
2401 | qemuio_add_command(&break_cmd); | |
2402 | qemuio_add_command(&remove_break_cmd); | |
2403 | qemuio_add_command(&resume_cmd); | |
2404 | qemuio_add_command(&wait_break_cmd); | |
2405 | qemuio_add_command(&abort_cmd); | |
2406 | qemuio_add_command(&sleep_cmd); | |
2407 | qemuio_add_command(&sigraise_cmd); | |
2408 | } |