]>
Commit | Line | Data |
---|---|---|
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 timeval tsub(struct timeval t1, struct timeval t2) | |
252 | { | |
253 | t1.tv_usec -= t2.tv_usec; | |
254 | if (t1.tv_usec < 0) { | |
255 | t1.tv_usec += 1000000; | |
256 | t1.tv_sec--; | |
257 | } | |
258 | t1.tv_sec -= t2.tv_sec; | |
259 | return t1; | |
260 | } | |
261 | ||
262 | static double tdiv(double value, struct timeval tv) | |
263 | { | |
264 | return value / ((double)tv.tv_sec + ((double)tv.tv_usec / 1000000.0)); | |
265 | } | |
266 | ||
267 | #define HOURS(sec) ((sec) / (60 * 60)) | |
268 | #define MINUTES(sec) (((sec) % (60 * 60)) / 60) | |
269 | #define SECONDS(sec) ((sec) % 60) | |
270 | ||
271 | enum { | |
272 | DEFAULT_TIME = 0x0, | |
273 | TERSE_FIXED_TIME = 0x1, | |
274 | VERBOSE_FIXED_TIME = 0x2, | |
275 | }; | |
276 | ||
277 | static void timestr(struct timeval *tv, char *ts, size_t size, int format) | |
278 | { | |
279 | double usec = (double)tv->tv_usec / 1000000.0; | |
280 | ||
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)); | |
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:%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)); | |
298 | } else { | |
299 | snprintf(ts, size, "0.%04u sec", (unsigned int) (usec * 10000)); | |
300 | } | |
301 | } | |
302 | ||
303 | /* | |
304 | * Parse the pattern argument to various sub-commands. | |
305 | * | |
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. | |
308 | */ | |
309 | static int parse_pattern(const char *arg) | |
310 | { | |
311 | char *endptr = NULL; | |
312 | long pattern; | |
313 | ||
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); | |
317 | return -1; | |
318 | } | |
319 | ||
320 | return pattern; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Memory allocation helpers. | |
325 | * | |
326 | * Make sure memory is aligned by default, or purposefully misaligned if | |
327 | * that is specified on the command line. | |
328 | */ | |
329 | ||
330 | #define MISALIGN_OFFSET 16 | |
331 | static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern) | |
332 | { | |
333 | void *buf; | |
334 | ||
335 | if (qemuio_misalign) { | |
336 | len += MISALIGN_OFFSET; | |
337 | } | |
338 | buf = blk_blockalign(blk, len); | |
339 | memset(buf, pattern, len); | |
340 | if (qemuio_misalign) { | |
341 | buf += MISALIGN_OFFSET; | |
342 | } | |
343 | return buf; | |
344 | } | |
345 | ||
346 | static void qemu_io_free(void *p) | |
347 | { | |
348 | if (qemuio_misalign) { | |
349 | p -= MISALIGN_OFFSET; | |
350 | } | |
351 | qemu_vfree(p); | |
352 | } | |
353 | ||
354 | static void dump_buffer(const void *buffer, int64_t offset, int64_t len) | |
355 | { | |
356 | uint64_t i; | |
357 | int j; | |
358 | const uint8_t *p; | |
359 | ||
360 | for (i = 0, p = buffer; i < len; i += 16) { | |
361 | const uint8_t *s = p; | |
362 | ||
363 | printf("%08" PRIx64 ": ", offset + i); | |
364 | for (j = 0; j < 16 && i + j < len; j++, p++) { | |
365 | printf("%02x ", *p); | |
366 | } | |
367 | printf(" "); | |
368 | for (j = 0; j < 16 && i + j < len; j++, s++) { | |
369 | if (isalnum(*s)) { | |
370 | printf("%c", *s); | |
371 | } else { | |
372 | printf("."); | |
373 | } | |
374 | } | |
375 | printf("\n"); | |
376 | } | |
377 | } | |
378 | ||
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) | |
381 | { | |
382 | char s1[64], s2[64], ts[64]; | |
383 | ||
384 | timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0); | |
385 | if (!Cflag) { | |
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", | |
394 | total, cnt, ts, | |
395 | tdiv((double)total, *t), | |
396 | tdiv((double)cnt, *t)); | |
397 | } | |
398 | } | |
399 | ||
400 | /* | |
401 | * Parse multiple length statements for vectored I/O, and construct an I/O | |
402 | * vector matching it. | |
403 | */ | |
404 | static void * | |
405 | create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov, | |
406 | int pattern) | |
407 | { | |
408 | size_t *sizes = g_new0(size_t, nr_iov); | |
409 | size_t count = 0; | |
410 | void *buf = NULL; | |
411 | void *p; | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < nr_iov; i++) { | |
415 | char *arg = argv[i]; | |
416 | int64_t len; | |
417 | ||
418 | len = cvtnum(arg); | |
419 | if (len < 0) { | |
420 | print_cvtnum_err(len, arg); | |
421 | goto fail; | |
422 | } | |
423 | ||
424 | if (len > BDRV_REQUEST_MAX_BYTES) { | |
425 | printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg, | |
426 | (uint64_t)BDRV_REQUEST_MAX_BYTES); | |
427 | goto fail; | |
428 | } | |
429 | ||
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); | |
433 | goto fail; | |
434 | } | |
435 | ||
436 | sizes[i] = len; | |
437 | count += len; | |
438 | } | |
439 | ||
440 | qemu_iovec_init(qiov, nr_iov); | |
441 | ||
442 | buf = p = qemu_io_alloc(blk, count, pattern); | |
443 | ||
444 | for (i = 0; i < nr_iov; i++) { | |
445 | qemu_iovec_add(qiov, p, sizes[i]); | |
446 | p += sizes[i]; | |
447 | } | |
448 | ||
449 | fail: | |
450 | g_free(sizes); | |
451 | return buf; | |
452 | } | |
453 | ||
454 | static int do_pread(BlockBackend *blk, char *buf, int64_t offset, | |
455 | int64_t bytes, int64_t *total) | |
456 | { | |
457 | if (bytes > INT_MAX) { | |
458 | return -ERANGE; | |
459 | } | |
460 | ||
461 | *total = blk_pread(blk, offset, (uint8_t *)buf, bytes); | |
462 | if (*total < 0) { | |
463 | return *total; | |
464 | } | |
465 | return 1; | |
466 | } | |
467 | ||
468 | static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, | |
469 | int64_t bytes, int flags, int64_t *total) | |
470 | { | |
471 | if (bytes > INT_MAX) { | |
472 | return -ERANGE; | |
473 | } | |
474 | ||
475 | *total = blk_pwrite(blk, offset, (uint8_t *)buf, bytes, flags); | |
476 | if (*total < 0) { | |
477 | return *total; | |
478 | } | |
479 | return 1; | |
480 | } | |
481 | ||
482 | typedef struct { | |
483 | BlockBackend *blk; | |
484 | int64_t offset; | |
485 | int64_t bytes; | |
486 | int64_t *total; | |
487 | int flags; | |
488 | int ret; | |
489 | bool done; | |
490 | } CoWriteZeroes; | |
491 | ||
492 | static void coroutine_fn co_pwrite_zeroes_entry(void *opaque) | |
493 | { | |
494 | CoWriteZeroes *data = opaque; | |
495 | ||
496 | data->ret = blk_co_pwrite_zeroes(data->blk, data->offset, data->bytes, | |
497 | data->flags); | |
498 | data->done = true; | |
499 | if (data->ret < 0) { | |
500 | *data->total = data->ret; | |
501 | return; | |
502 | } | |
503 | ||
504 | *data->total = data->bytes; | |
505 | } | |
506 | ||
507 | static int do_co_pwrite_zeroes(BlockBackend *blk, int64_t offset, | |
508 | int64_t bytes, int flags, int64_t *total) | |
509 | { | |
510 | Coroutine *co; | |
511 | CoWriteZeroes data = { | |
512 | .blk = blk, | |
513 | .offset = offset, | |
514 | .bytes = bytes, | |
515 | .total = total, | |
516 | .flags = flags, | |
517 | .done = false, | |
518 | }; | |
519 | ||
520 | if (bytes > INT_MAX) { | |
521 | return -ERANGE; | |
522 | } | |
523 | ||
524 | co = qemu_coroutine_create(co_pwrite_zeroes_entry, &data); | |
525 | bdrv_coroutine_enter(blk_bs(blk), co); | |
526 | while (!data.done) { | |
527 | aio_poll(blk_get_aio_context(blk), true); | |
528 | } | |
529 | if (data.ret < 0) { | |
530 | return data.ret; | |
531 | } else { | |
532 | return 1; | |
533 | } | |
534 | } | |
535 | ||
536 | static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset, | |
537 | int64_t bytes, int64_t *total) | |
538 | { | |
539 | int ret; | |
540 | ||
541 | if (bytes > BDRV_REQUEST_MAX_BYTES) { | |
542 | return -ERANGE; | |
543 | } | |
544 | ||
545 | ret = blk_pwrite_compressed(blk, offset, buf, bytes); | |
546 | if (ret < 0) { | |
547 | return ret; | |
548 | } | |
549 | *total = bytes; | |
550 | return 1; | |
551 | } | |
552 | ||
553 | static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset, | |
554 | int64_t count, int64_t *total) | |
555 | { | |
556 | if (count > INT_MAX) { | |
557 | return -ERANGE; | |
558 | } | |
559 | ||
560 | *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count); | |
561 | if (*total < 0) { | |
562 | return *total; | |
563 | } | |
564 | return 1; | |
565 | } | |
566 | ||
567 | static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset, | |
568 | int64_t count, int64_t *total) | |
569 | { | |
570 | if (count > INT_MAX) { | |
571 | return -ERANGE; | |
572 | } | |
573 | ||
574 | *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count); | |
575 | if (*total < 0) { | |
576 | return *total; | |
577 | } | |
578 | return 1; | |
579 | } | |
580 | ||
581 | #define NOT_DONE 0x7fffffff | |
582 | static void aio_rw_done(void *opaque, int ret) | |
583 | { | |
584 | *(int *)opaque = ret; | |
585 | } | |
586 | ||
587 | static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov, | |
588 | int64_t offset, int *total) | |
589 | { | |
590 | int async_ret = NOT_DONE; | |
591 | ||
592 | blk_aio_preadv(blk, offset, qiov, 0, aio_rw_done, &async_ret); | |
593 | while (async_ret == NOT_DONE) { | |
594 | main_loop_wait(false); | |
595 | } | |
596 | ||
597 | *total = qiov->size; | |
598 | return async_ret < 0 ? async_ret : 1; | |
599 | } | |
600 | ||
601 | static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov, | |
602 | int64_t offset, int flags, int *total) | |
603 | { | |
604 | int async_ret = NOT_DONE; | |
605 | ||
606 | blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret); | |
607 | while (async_ret == NOT_DONE) { | |
608 | main_loop_wait(false); | |
609 | } | |
610 | ||
611 | *total = qiov->size; | |
612 | return async_ret < 0 ? async_ret : 1; | |
613 | } | |
614 | ||
615 | static void read_help(void) | |
616 | { | |
617 | printf( | |
618 | "\n" | |
619 | " reads a range of bytes from the given offset\n" | |
620 | "\n" | |
621 | " Example:\n" | |
622 | " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n" | |
623 | "\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" | |
634 | "\n"); | |
635 | } | |
636 | ||
637 | static int read_f(BlockBackend *blk, int argc, char **argv); | |
638 | ||
639 | static const cmdinfo_t read_cmd = { | |
640 | .name = "read", | |
641 | .altname = "r", | |
642 | .cfunc = read_f, | |
643 | .argmin = 2, | |
644 | .argmax = -1, | |
645 | .args = "[-abCqv] [-P pattern [-s off] [-l len]] off len", | |
646 | .oneline = "reads a number of bytes at a specified offset", | |
647 | .help = read_help, | |
648 | }; | |
649 | ||
650 | static int read_f(BlockBackend *blk, int argc, char **argv) | |
651 | { | |
652 | struct timeval t1, t2; | |
653 | bool Cflag = false, qflag = false, vflag = false; | |
654 | bool Pflag = false, sflag = false, lflag = false, bflag = false; | |
655 | int c, cnt, ret; | |
656 | char *buf; | |
657 | int64_t offset; | |
658 | int64_t count; | |
659 | /* Some compilers get confused and warn if this is not initialized. */ | |
660 | int64_t total = 0; | |
661 | int pattern = 0; | |
662 | int64_t pattern_offset = 0, pattern_count = 0; | |
663 | ||
664 | while ((c = getopt(argc, argv, "bCl:pP:qs:v")) != -1) { | |
665 | switch (c) { | |
666 | case 'b': | |
667 | bflag = true; | |
668 | break; | |
669 | case 'C': | |
670 | Cflag = true; | |
671 | break; | |
672 | case 'l': | |
673 | lflag = true; | |
674 | pattern_count = cvtnum(optarg); | |
675 | if (pattern_count < 0) { | |
676 | print_cvtnum_err(pattern_count, optarg); | |
677 | return pattern_count; | |
678 | } | |
679 | break; | |
680 | case 'p': | |
681 | /* Ignored for backwards compatibility */ | |
682 | break; | |
683 | case 'P': | |
684 | Pflag = true; | |
685 | pattern = parse_pattern(optarg); | |
686 | if (pattern < 0) { | |
687 | return -EINVAL; | |
688 | } | |
689 | break; | |
690 | case 'q': | |
691 | qflag = true; | |
692 | break; | |
693 | case 's': | |
694 | sflag = true; | |
695 | pattern_offset = cvtnum(optarg); | |
696 | if (pattern_offset < 0) { | |
697 | print_cvtnum_err(pattern_offset, optarg); | |
698 | return pattern_offset; | |
699 | } | |
700 | break; | |
701 | case 'v': | |
702 | vflag = true; | |
703 | break; | |
704 | default: | |
705 | qemuio_command_usage(&read_cmd); | |
706 | return -EINVAL; | |
707 | } | |
708 | } | |
709 | ||
710 | if (optind != argc - 2) { | |
711 | qemuio_command_usage(&read_cmd); | |
712 | return -EINVAL; | |
713 | } | |
714 | ||
715 | offset = cvtnum(argv[optind]); | |
716 | if (offset < 0) { | |
717 | print_cvtnum_err(offset, argv[optind]); | |
718 | return offset; | |
719 | } | |
720 | ||
721 | optind++; | |
722 | count = cvtnum(argv[optind]); | |
723 | if (count < 0) { | |
724 | print_cvtnum_err(count, argv[optind]); | |
725 | return count; | |
726 | } else if (count > BDRV_REQUEST_MAX_BYTES) { | |
727 | printf("length cannot exceed %" PRIu64 ", given %s\n", | |
728 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
729 | return -EINVAL; | |
730 | } | |
731 | ||
732 | if (!Pflag && (lflag || sflag)) { | |
733 | qemuio_command_usage(&read_cmd); | |
734 | return -EINVAL; | |
735 | } | |
736 | ||
737 | if (!lflag) { | |
738 | pattern_count = count - pattern_offset; | |
739 | } | |
740 | ||
741 | if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) { | |
742 | printf("pattern verification range exceeds end of read data\n"); | |
743 | return -EINVAL; | |
744 | } | |
745 | ||
746 | if (bflag) { | |
747 | if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { | |
748 | printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", | |
749 | offset); | |
750 | return -EINVAL; | |
751 | } | |
752 | if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { | |
753 | printf("%"PRId64" is not a sector-aligned value for 'count'\n", | |
754 | count); | |
755 | return -EINVAL; | |
756 | } | |
757 | } | |
758 | ||
759 | buf = qemu_io_alloc(blk, count, 0xab); | |
760 | ||
761 | gettimeofday(&t1, NULL); | |
762 | if (bflag) { | |
763 | ret = do_load_vmstate(blk, buf, offset, count, &total); | |
764 | } else { | |
765 | ret = do_pread(blk, buf, offset, count, &total); | |
766 | } | |
767 | gettimeofday(&t2, NULL); | |
768 | ||
769 | if (ret < 0) { | |
770 | printf("read failed: %s\n", strerror(-ret)); | |
771 | goto out; | |
772 | } | |
773 | cnt = ret; | |
774 | ||
775 | ret = 0; | |
776 | ||
777 | if (Pflag) { | |
778 | void *cmp_buf = g_malloc(pattern_count); | |
779 | memset(cmp_buf, pattern, pattern_count); | |
780 | if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) { | |
781 | printf("Pattern verification failed at offset %" | |
782 | PRId64 ", %"PRId64" bytes\n", | |
783 | offset + pattern_offset, pattern_count); | |
784 | ret = -EINVAL; | |
785 | } | |
786 | g_free(cmp_buf); | |
787 | } | |
788 | ||
789 | if (qflag) { | |
790 | goto out; | |
791 | } | |
792 | ||
793 | if (vflag) { | |
794 | dump_buffer(buf, offset, count); | |
795 | } | |
796 | ||
797 | /* Finally, report back -- -C gives a parsable format */ | |
798 | t2 = tsub(t2, t1); | |
799 | print_report("read", &t2, offset, count, total, cnt, Cflag); | |
800 | ||
801 | out: | |
802 | qemu_io_free(buf); | |
803 | return ret; | |
804 | } | |
805 | ||
806 | static void readv_help(void) | |
807 | { | |
808 | printf( | |
809 | "\n" | |
810 | " reads a range of bytes from the given offset into multiple buffers\n" | |
811 | "\n" | |
812 | " Example:\n" | |
813 | " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" | |
814 | "\n" | |
815 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
816 | " standard output stream (with -v option) for subsequent inspection.\n" | |
817 | " Uses multiple iovec buffers if more than one byte range is specified.\n" | |
818 | " -C, -- report statistics in a machine parsable format\n" | |
819 | " -P, -- use a pattern to verify read data\n" | |
820 | " -v, -- dump buffer to standard output\n" | |
821 | " -q, -- quiet mode, do not show I/O statistics\n" | |
822 | "\n"); | |
823 | } | |
824 | ||
825 | static int readv_f(BlockBackend *blk, int argc, char **argv); | |
826 | ||
827 | static const cmdinfo_t readv_cmd = { | |
828 | .name = "readv", | |
829 | .cfunc = readv_f, | |
830 | .argmin = 2, | |
831 | .argmax = -1, | |
832 | .args = "[-Cqv] [-P pattern] off len [len..]", | |
833 | .oneline = "reads a number of bytes at a specified offset", | |
834 | .help = readv_help, | |
835 | }; | |
836 | ||
837 | static int readv_f(BlockBackend *blk, int argc, char **argv) | |
838 | { | |
839 | struct timeval t1, t2; | |
840 | bool Cflag = false, qflag = false, vflag = false; | |
841 | int c, cnt, ret; | |
842 | char *buf; | |
843 | int64_t offset; | |
844 | /* Some compilers get confused and warn if this is not initialized. */ | |
845 | int total = 0; | |
846 | int nr_iov; | |
847 | QEMUIOVector qiov; | |
848 | int pattern = 0; | |
849 | bool Pflag = false; | |
850 | ||
851 | while ((c = getopt(argc, argv, "CP:qv")) != -1) { | |
852 | switch (c) { | |
853 | case 'C': | |
854 | Cflag = true; | |
855 | break; | |
856 | case 'P': | |
857 | Pflag = true; | |
858 | pattern = parse_pattern(optarg); | |
859 | if (pattern < 0) { | |
860 | return -EINVAL; | |
861 | } | |
862 | break; | |
863 | case 'q': | |
864 | qflag = true; | |
865 | break; | |
866 | case 'v': | |
867 | vflag = true; | |
868 | break; | |
869 | default: | |
870 | qemuio_command_usage(&readv_cmd); | |
871 | return -EINVAL; | |
872 | } | |
873 | } | |
874 | ||
875 | if (optind > argc - 2) { | |
876 | qemuio_command_usage(&readv_cmd); | |
877 | return -EINVAL; | |
878 | } | |
879 | ||
880 | ||
881 | offset = cvtnum(argv[optind]); | |
882 | if (offset < 0) { | |
883 | print_cvtnum_err(offset, argv[optind]); | |
884 | return offset; | |
885 | } | |
886 | optind++; | |
887 | ||
888 | nr_iov = argc - optind; | |
889 | buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab); | |
890 | if (buf == NULL) { | |
891 | return -EINVAL; | |
892 | } | |
893 | ||
894 | gettimeofday(&t1, NULL); | |
895 | ret = do_aio_readv(blk, &qiov, offset, &total); | |
896 | gettimeofday(&t2, NULL); | |
897 | ||
898 | if (ret < 0) { | |
899 | printf("readv failed: %s\n", strerror(-ret)); | |
900 | goto out; | |
901 | } | |
902 | cnt = ret; | |
903 | ||
904 | ret = 0; | |
905 | ||
906 | if (Pflag) { | |
907 | void *cmp_buf = g_malloc(qiov.size); | |
908 | memset(cmp_buf, pattern, qiov.size); | |
909 | if (memcmp(buf, cmp_buf, qiov.size)) { | |
910 | printf("Pattern verification failed at offset %" | |
911 | PRId64 ", %zu bytes\n", offset, qiov.size); | |
912 | ret = -EINVAL; | |
913 | } | |
914 | g_free(cmp_buf); | |
915 | } | |
916 | ||
917 | if (qflag) { | |
918 | goto out; | |
919 | } | |
920 | ||
921 | if (vflag) { | |
922 | dump_buffer(buf, offset, qiov.size); | |
923 | } | |
924 | ||
925 | /* Finally, report back -- -C gives a parsable format */ | |
926 | t2 = tsub(t2, t1); | |
927 | print_report("read", &t2, offset, qiov.size, total, cnt, Cflag); | |
928 | ||
929 | out: | |
930 | qemu_iovec_destroy(&qiov); | |
931 | qemu_io_free(buf); | |
932 | return ret; | |
933 | } | |
934 | ||
935 | static void write_help(void) | |
936 | { | |
937 | printf( | |
938 | "\n" | |
939 | " writes a range of bytes from the given offset\n" | |
940 | "\n" | |
941 | " Example:\n" | |
942 | " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n" | |
943 | "\n" | |
944 | " Writes into a segment of the currently open file, using a buffer\n" | |
945 | " filled with a set pattern (0xcdcdcdcd).\n" | |
946 | " -b, -- write to the VM state rather than the virtual disk\n" | |
947 | " -c, -- write compressed data with blk_write_compressed\n" | |
948 | " -f, -- use Force Unit Access semantics\n" | |
949 | " -n, -- with -z, don't allow slow fallback\n" | |
950 | " -p, -- ignored for backwards compatibility\n" | |
951 | " -P, -- use different pattern to fill file\n" | |
952 | " -C, -- report statistics in a machine parsable format\n" | |
953 | " -q, -- quiet mode, do not show I/O statistics\n" | |
954 | " -u, -- with -z, allow unmapping\n" | |
955 | " -z, -- write zeroes using blk_co_pwrite_zeroes\n" | |
956 | "\n"); | |
957 | } | |
958 | ||
959 | static int write_f(BlockBackend *blk, int argc, char **argv); | |
960 | ||
961 | static const cmdinfo_t write_cmd = { | |
962 | .name = "write", | |
963 | .altname = "w", | |
964 | .cfunc = write_f, | |
965 | .perm = BLK_PERM_WRITE, | |
966 | .argmin = 2, | |
967 | .argmax = -1, | |
968 | .args = "[-bcCfnquz] [-P pattern] off len", | |
969 | .oneline = "writes a number of bytes at a specified offset", | |
970 | .help = write_help, | |
971 | }; | |
972 | ||
973 | static int write_f(BlockBackend *blk, int argc, char **argv) | |
974 | { | |
975 | struct timeval t1, t2; | |
976 | bool Cflag = false, qflag = false, bflag = false; | |
977 | bool Pflag = false, zflag = false, cflag = false; | |
978 | int flags = 0; | |
979 | int c, cnt, ret; | |
980 | char *buf = NULL; | |
981 | int64_t offset; | |
982 | int64_t count; | |
983 | /* Some compilers get confused and warn if this is not initialized. */ | |
984 | int64_t total = 0; | |
985 | int pattern = 0xcd; | |
986 | ||
987 | while ((c = getopt(argc, argv, "bcCfnpP:quz")) != -1) { | |
988 | switch (c) { | |
989 | case 'b': | |
990 | bflag = true; | |
991 | break; | |
992 | case 'c': | |
993 | cflag = true; | |
994 | break; | |
995 | case 'C': | |
996 | Cflag = true; | |
997 | break; | |
998 | case 'f': | |
999 | flags |= BDRV_REQ_FUA; | |
1000 | break; | |
1001 | case 'n': | |
1002 | flags |= BDRV_REQ_NO_FALLBACK; | |
1003 | break; | |
1004 | case 'p': | |
1005 | /* Ignored for backwards compatibility */ | |
1006 | break; | |
1007 | case 'P': | |
1008 | Pflag = true; | |
1009 | pattern = parse_pattern(optarg); | |
1010 | if (pattern < 0) { | |
1011 | return -EINVAL; | |
1012 | } | |
1013 | break; | |
1014 | case 'q': | |
1015 | qflag = true; | |
1016 | break; | |
1017 | case 'u': | |
1018 | flags |= BDRV_REQ_MAY_UNMAP; | |
1019 | break; | |
1020 | case 'z': | |
1021 | zflag = true; | |
1022 | break; | |
1023 | default: | |
1024 | qemuio_command_usage(&write_cmd); | |
1025 | return -EINVAL; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | if (optind != argc - 2) { | |
1030 | qemuio_command_usage(&write_cmd); | |
1031 | return -EINVAL; | |
1032 | } | |
1033 | ||
1034 | if (bflag && zflag) { | |
1035 | printf("-b and -z cannot be specified at the same time\n"); | |
1036 | return -EINVAL; | |
1037 | } | |
1038 | ||
1039 | if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) { | |
1040 | printf("-f and -b or -c cannot be specified at the same time\n"); | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
1044 | if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) { | |
1045 | printf("-n requires -z to be specified\n"); | |
1046 | return -EINVAL; | |
1047 | } | |
1048 | ||
1049 | if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) { | |
1050 | printf("-u requires -z to be specified\n"); | |
1051 | return -EINVAL; | |
1052 | } | |
1053 | ||
1054 | if (zflag && Pflag) { | |
1055 | printf("-z and -P cannot be specified at the same time\n"); | |
1056 | return -EINVAL; | |
1057 | } | |
1058 | ||
1059 | offset = cvtnum(argv[optind]); | |
1060 | if (offset < 0) { | |
1061 | print_cvtnum_err(offset, argv[optind]); | |
1062 | return offset; | |
1063 | } | |
1064 | ||
1065 | optind++; | |
1066 | count = cvtnum(argv[optind]); | |
1067 | if (count < 0) { | |
1068 | print_cvtnum_err(count, argv[optind]); | |
1069 | return count; | |
1070 | } else if (count > BDRV_REQUEST_MAX_BYTES) { | |
1071 | printf("length cannot exceed %" PRIu64 ", given %s\n", | |
1072 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
1073 | return -EINVAL; | |
1074 | } | |
1075 | ||
1076 | if (bflag || cflag) { | |
1077 | if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { | |
1078 | printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", | |
1079 | offset); | |
1080 | return -EINVAL; | |
1081 | } | |
1082 | ||
1083 | if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { | |
1084 | printf("%"PRId64" is not a sector-aligned value for 'count'\n", | |
1085 | count); | |
1086 | return -EINVAL; | |
1087 | } | |
1088 | } | |
1089 | ||
1090 | if (!zflag) { | |
1091 | buf = qemu_io_alloc(blk, count, pattern); | |
1092 | } | |
1093 | ||
1094 | gettimeofday(&t1, NULL); | |
1095 | if (bflag) { | |
1096 | ret = do_save_vmstate(blk, buf, offset, count, &total); | |
1097 | } else if (zflag) { | |
1098 | ret = do_co_pwrite_zeroes(blk, offset, count, flags, &total); | |
1099 | } else if (cflag) { | |
1100 | ret = do_write_compressed(blk, buf, offset, count, &total); | |
1101 | } else { | |
1102 | ret = do_pwrite(blk, buf, offset, count, flags, &total); | |
1103 | } | |
1104 | gettimeofday(&t2, NULL); | |
1105 | ||
1106 | if (ret < 0) { | |
1107 | printf("write failed: %s\n", strerror(-ret)); | |
1108 | goto out; | |
1109 | } | |
1110 | cnt = ret; | |
1111 | ||
1112 | ret = 0; | |
1113 | ||
1114 | if (qflag) { | |
1115 | goto out; | |
1116 | } | |
1117 | ||
1118 | /* Finally, report back -- -C gives a parsable format */ | |
1119 | t2 = tsub(t2, t1); | |
1120 | print_report("wrote", &t2, offset, count, total, cnt, Cflag); | |
1121 | ||
1122 | out: | |
1123 | if (!zflag) { | |
1124 | qemu_io_free(buf); | |
1125 | } | |
1126 | return ret; | |
1127 | } | |
1128 | ||
1129 | static void | |
1130 | writev_help(void) | |
1131 | { | |
1132 | printf( | |
1133 | "\n" | |
1134 | " writes a range of bytes from the given offset source from multiple buffers\n" | |
1135 | "\n" | |
1136 | " Example:\n" | |
1137 | " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" | |
1138 | "\n" | |
1139 | " Writes into a segment of the currently open file, using a buffer\n" | |
1140 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1141 | " -P, -- use different pattern to fill file\n" | |
1142 | " -C, -- report statistics in a machine parsable format\n" | |
1143 | " -f, -- use Force Unit Access semantics\n" | |
1144 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1145 | "\n"); | |
1146 | } | |
1147 | ||
1148 | static int writev_f(BlockBackend *blk, int argc, char **argv); | |
1149 | ||
1150 | static const cmdinfo_t writev_cmd = { | |
1151 | .name = "writev", | |
1152 | .cfunc = writev_f, | |
1153 | .perm = BLK_PERM_WRITE, | |
1154 | .argmin = 2, | |
1155 | .argmax = -1, | |
1156 | .args = "[-Cfq] [-P pattern] off len [len..]", | |
1157 | .oneline = "writes a number of bytes at a specified offset", | |
1158 | .help = writev_help, | |
1159 | }; | |
1160 | ||
1161 | static int writev_f(BlockBackend *blk, int argc, char **argv) | |
1162 | { | |
1163 | struct timeval t1, t2; | |
1164 | bool Cflag = false, qflag = false; | |
1165 | int flags = 0; | |
1166 | int c, cnt, ret; | |
1167 | char *buf; | |
1168 | int64_t offset; | |
1169 | /* Some compilers get confused and warn if this is not initialized. */ | |
1170 | int total = 0; | |
1171 | int nr_iov; | |
1172 | int pattern = 0xcd; | |
1173 | QEMUIOVector qiov; | |
1174 | ||
1175 | while ((c = getopt(argc, argv, "CfqP:")) != -1) { | |
1176 | switch (c) { | |
1177 | case 'C': | |
1178 | Cflag = true; | |
1179 | break; | |
1180 | case 'f': | |
1181 | flags |= BDRV_REQ_FUA; | |
1182 | break; | |
1183 | case 'q': | |
1184 | qflag = true; | |
1185 | break; | |
1186 | case 'P': | |
1187 | pattern = parse_pattern(optarg); | |
1188 | if (pattern < 0) { | |
1189 | return -EINVAL; | |
1190 | } | |
1191 | break; | |
1192 | default: | |
1193 | qemuio_command_usage(&writev_cmd); | |
1194 | return -EINVAL; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | if (optind > argc - 2) { | |
1199 | qemuio_command_usage(&writev_cmd); | |
1200 | return -EINVAL; | |
1201 | } | |
1202 | ||
1203 | offset = cvtnum(argv[optind]); | |
1204 | if (offset < 0) { | |
1205 | print_cvtnum_err(offset, argv[optind]); | |
1206 | return offset; | |
1207 | } | |
1208 | optind++; | |
1209 | ||
1210 | nr_iov = argc - optind; | |
1211 | buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern); | |
1212 | if (buf == NULL) { | |
1213 | return -EINVAL; | |
1214 | } | |
1215 | ||
1216 | gettimeofday(&t1, NULL); | |
1217 | ret = do_aio_writev(blk, &qiov, offset, flags, &total); | |
1218 | gettimeofday(&t2, NULL); | |
1219 | ||
1220 | if (ret < 0) { | |
1221 | printf("writev failed: %s\n", strerror(-ret)); | |
1222 | goto out; | |
1223 | } | |
1224 | cnt = ret; | |
1225 | ||
1226 | ret = 0; | |
1227 | ||
1228 | if (qflag) { | |
1229 | goto out; | |
1230 | } | |
1231 | ||
1232 | /* Finally, report back -- -C gives a parsable format */ | |
1233 | t2 = tsub(t2, t1); | |
1234 | print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); | |
1235 | out: | |
1236 | qemu_iovec_destroy(&qiov); | |
1237 | qemu_io_free(buf); | |
1238 | return ret; | |
1239 | } | |
1240 | ||
1241 | struct aio_ctx { | |
1242 | BlockBackend *blk; | |
1243 | QEMUIOVector qiov; | |
1244 | int64_t offset; | |
1245 | char *buf; | |
1246 | bool qflag; | |
1247 | bool vflag; | |
1248 | bool Cflag; | |
1249 | bool Pflag; | |
1250 | bool zflag; | |
1251 | BlockAcctCookie acct; | |
1252 | int pattern; | |
1253 | struct timeval t1; | |
1254 | }; | |
1255 | ||
1256 | static void aio_write_done(void *opaque, int ret) | |
1257 | { | |
1258 | struct aio_ctx *ctx = opaque; | |
1259 | struct timeval t2; | |
1260 | ||
1261 | gettimeofday(&t2, NULL); | |
1262 | ||
1263 | ||
1264 | if (ret < 0) { | |
1265 | printf("aio_write failed: %s\n", strerror(-ret)); | |
1266 | block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); | |
1267 | goto out; | |
1268 | } | |
1269 | ||
1270 | block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); | |
1271 | ||
1272 | if (ctx->qflag) { | |
1273 | goto out; | |
1274 | } | |
1275 | ||
1276 | /* Finally, report back -- -C gives a parsable format */ | |
1277 | t2 = tsub(t2, ctx->t1); | |
1278 | print_report("wrote", &t2, ctx->offset, ctx->qiov.size, | |
1279 | ctx->qiov.size, 1, ctx->Cflag); | |
1280 | out: | |
1281 | if (!ctx->zflag) { | |
1282 | qemu_io_free(ctx->buf); | |
1283 | qemu_iovec_destroy(&ctx->qiov); | |
1284 | } | |
1285 | g_free(ctx); | |
1286 | } | |
1287 | ||
1288 | static void aio_read_done(void *opaque, int ret) | |
1289 | { | |
1290 | struct aio_ctx *ctx = opaque; | |
1291 | struct timeval t2; | |
1292 | ||
1293 | gettimeofday(&t2, NULL); | |
1294 | ||
1295 | if (ret < 0) { | |
1296 | printf("readv failed: %s\n", strerror(-ret)); | |
1297 | block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); | |
1298 | goto out; | |
1299 | } | |
1300 | ||
1301 | if (ctx->Pflag) { | |
1302 | void *cmp_buf = g_malloc(ctx->qiov.size); | |
1303 | ||
1304 | memset(cmp_buf, ctx->pattern, ctx->qiov.size); | |
1305 | if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) { | |
1306 | printf("Pattern verification failed at offset %" | |
1307 | PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size); | |
1308 | } | |
1309 | g_free(cmp_buf); | |
1310 | } | |
1311 | ||
1312 | block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); | |
1313 | ||
1314 | if (ctx->qflag) { | |
1315 | goto out; | |
1316 | } | |
1317 | ||
1318 | if (ctx->vflag) { | |
1319 | dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size); | |
1320 | } | |
1321 | ||
1322 | /* Finally, report back -- -C gives a parsable format */ | |
1323 | t2 = tsub(t2, ctx->t1); | |
1324 | print_report("read", &t2, ctx->offset, ctx->qiov.size, | |
1325 | ctx->qiov.size, 1, ctx->Cflag); | |
1326 | out: | |
1327 | qemu_io_free(ctx->buf); | |
1328 | qemu_iovec_destroy(&ctx->qiov); | |
1329 | g_free(ctx); | |
1330 | } | |
1331 | ||
1332 | static void aio_read_help(void) | |
1333 | { | |
1334 | printf( | |
1335 | "\n" | |
1336 | " asynchronously reads a range of bytes from the given offset\n" | |
1337 | "\n" | |
1338 | " Example:\n" | |
1339 | " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" | |
1340 | "\n" | |
1341 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
1342 | " standard output stream (with -v option) for subsequent inspection.\n" | |
1343 | " The read is performed asynchronously and the aio_flush command must be\n" | |
1344 | " used to ensure all outstanding aio requests have been completed.\n" | |
1345 | " Note that due to its asynchronous nature, this command will be\n" | |
1346 | " considered successful once the request is submitted, independently\n" | |
1347 | " of potential I/O errors or pattern mismatches.\n" | |
1348 | " -C, -- report statistics in a machine parsable format\n" | |
1349 | " -P, -- use a pattern to verify read data\n" | |
1350 | " -i, -- treat request as invalid, for exercising stats\n" | |
1351 | " -v, -- dump buffer to standard output\n" | |
1352 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1353 | "\n"); | |
1354 | } | |
1355 | ||
1356 | static int aio_read_f(BlockBackend *blk, int argc, char **argv); | |
1357 | ||
1358 | static const cmdinfo_t aio_read_cmd = { | |
1359 | .name = "aio_read", | |
1360 | .cfunc = aio_read_f, | |
1361 | .argmin = 2, | |
1362 | .argmax = -1, | |
1363 | .args = "[-Ciqv] [-P pattern] off len [len..]", | |
1364 | .oneline = "asynchronously reads a number of bytes", | |
1365 | .help = aio_read_help, | |
1366 | }; | |
1367 | ||
1368 | static int aio_read_f(BlockBackend *blk, int argc, char **argv) | |
1369 | { | |
1370 | int nr_iov, c; | |
1371 | struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); | |
1372 | ||
1373 | ctx->blk = blk; | |
1374 | while ((c = getopt(argc, argv, "CP:iqv")) != -1) { | |
1375 | switch (c) { | |
1376 | case 'C': | |
1377 | ctx->Cflag = true; | |
1378 | break; | |
1379 | case 'P': | |
1380 | ctx->Pflag = true; | |
1381 | ctx->pattern = parse_pattern(optarg); | |
1382 | if (ctx->pattern < 0) { | |
1383 | g_free(ctx); | |
1384 | return -EINVAL; | |
1385 | } | |
1386 | break; | |
1387 | case 'i': | |
1388 | printf("injecting invalid read request\n"); | |
1389 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); | |
1390 | g_free(ctx); | |
1391 | return 0; | |
1392 | case 'q': | |
1393 | ctx->qflag = true; | |
1394 | break; | |
1395 | case 'v': | |
1396 | ctx->vflag = true; | |
1397 | break; | |
1398 | default: | |
1399 | g_free(ctx); | |
1400 | qemuio_command_usage(&aio_read_cmd); | |
1401 | return -EINVAL; | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | if (optind > argc - 2) { | |
1406 | g_free(ctx); | |
1407 | qemuio_command_usage(&aio_read_cmd); | |
1408 | return -EINVAL; | |
1409 | } | |
1410 | ||
1411 | ctx->offset = cvtnum(argv[optind]); | |
1412 | if (ctx->offset < 0) { | |
1413 | int ret = ctx->offset; | |
1414 | print_cvtnum_err(ret, argv[optind]); | |
1415 | g_free(ctx); | |
1416 | return ret; | |
1417 | } | |
1418 | optind++; | |
1419 | ||
1420 | nr_iov = argc - optind; | |
1421 | ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab); | |
1422 | if (ctx->buf == NULL) { | |
1423 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); | |
1424 | g_free(ctx); | |
1425 | return -EINVAL; | |
1426 | } | |
1427 | ||
1428 | gettimeofday(&ctx->t1, NULL); | |
1429 | block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, | |
1430 | BLOCK_ACCT_READ); | |
1431 | blk_aio_preadv(blk, ctx->offset, &ctx->qiov, 0, aio_read_done, ctx); | |
1432 | return 0; | |
1433 | } | |
1434 | ||
1435 | static void aio_write_help(void) | |
1436 | { | |
1437 | printf( | |
1438 | "\n" | |
1439 | " asynchronously writes a range of bytes from the given offset source\n" | |
1440 | " from multiple buffers\n" | |
1441 | "\n" | |
1442 | " Example:\n" | |
1443 | " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" | |
1444 | "\n" | |
1445 | " Writes into a segment of the currently open file, using a buffer\n" | |
1446 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1447 | " The write is performed asynchronously and the aio_flush command must be\n" | |
1448 | " used to ensure all outstanding aio requests have been completed.\n" | |
1449 | " Note that due to its asynchronous nature, this command will be\n" | |
1450 | " considered successful once the request is submitted, independently\n" | |
1451 | " of potential I/O errors or pattern mismatches.\n" | |
1452 | " -P, -- use different pattern to fill file\n" | |
1453 | " -C, -- report statistics in a machine parsable format\n" | |
1454 | " -f, -- use Force Unit Access semantics\n" | |
1455 | " -i, -- treat request as invalid, for exercising stats\n" | |
1456 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1457 | " -u, -- with -z, allow unmapping\n" | |
1458 | " -z, -- write zeroes using blk_aio_pwrite_zeroes\n" | |
1459 | "\n"); | |
1460 | } | |
1461 | ||
1462 | static int aio_write_f(BlockBackend *blk, int argc, char **argv); | |
1463 | ||
1464 | static const cmdinfo_t aio_write_cmd = { | |
1465 | .name = "aio_write", | |
1466 | .cfunc = aio_write_f, | |
1467 | .perm = BLK_PERM_WRITE, | |
1468 | .argmin = 2, | |
1469 | .argmax = -1, | |
1470 | .args = "[-Cfiquz] [-P pattern] off len [len..]", | |
1471 | .oneline = "asynchronously writes a number of bytes", | |
1472 | .help = aio_write_help, | |
1473 | }; | |
1474 | ||
1475 | static int aio_write_f(BlockBackend *blk, int argc, char **argv) | |
1476 | { | |
1477 | int nr_iov, c; | |
1478 | int pattern = 0xcd; | |
1479 | struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); | |
1480 | int flags = 0; | |
1481 | ||
1482 | ctx->blk = blk; | |
1483 | while ((c = getopt(argc, argv, "CfiqP:uz")) != -1) { | |
1484 | switch (c) { | |
1485 | case 'C': | |
1486 | ctx->Cflag = true; | |
1487 | break; | |
1488 | case 'f': | |
1489 | flags |= BDRV_REQ_FUA; | |
1490 | break; | |
1491 | case 'q': | |
1492 | ctx->qflag = true; | |
1493 | break; | |
1494 | case 'u': | |
1495 | flags |= BDRV_REQ_MAY_UNMAP; | |
1496 | break; | |
1497 | case 'P': | |
1498 | pattern = parse_pattern(optarg); | |
1499 | if (pattern < 0) { | |
1500 | g_free(ctx); | |
1501 | return -EINVAL; | |
1502 | } | |
1503 | break; | |
1504 | case 'i': | |
1505 | printf("injecting invalid write request\n"); | |
1506 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); | |
1507 | g_free(ctx); | |
1508 | return 0; | |
1509 | case 'z': | |
1510 | ctx->zflag = true; | |
1511 | break; | |
1512 | default: | |
1513 | g_free(ctx); | |
1514 | qemuio_command_usage(&aio_write_cmd); | |
1515 | return -EINVAL; | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | if (optind > argc - 2) { | |
1520 | g_free(ctx); | |
1521 | qemuio_command_usage(&aio_write_cmd); | |
1522 | return -EINVAL; | |
1523 | } | |
1524 | ||
1525 | if (ctx->zflag && optind != argc - 2) { | |
1526 | printf("-z supports only a single length parameter\n"); | |
1527 | g_free(ctx); | |
1528 | return -EINVAL; | |
1529 | } | |
1530 | ||
1531 | if ((flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) { | |
1532 | printf("-u requires -z to be specified\n"); | |
1533 | g_free(ctx); | |
1534 | return -EINVAL; | |
1535 | } | |
1536 | ||
1537 | if (ctx->zflag && ctx->Pflag) { | |
1538 | printf("-z and -P cannot be specified at the same time\n"); | |
1539 | g_free(ctx); | |
1540 | return -EINVAL; | |
1541 | } | |
1542 | ||
1543 | ctx->offset = cvtnum(argv[optind]); | |
1544 | if (ctx->offset < 0) { | |
1545 | int ret = ctx->offset; | |
1546 | print_cvtnum_err(ret, argv[optind]); | |
1547 | g_free(ctx); | |
1548 | return ret; | |
1549 | } | |
1550 | optind++; | |
1551 | ||
1552 | if (ctx->zflag) { | |
1553 | int64_t count = cvtnum(argv[optind]); | |
1554 | if (count < 0) { | |
1555 | print_cvtnum_err(count, argv[optind]); | |
1556 | g_free(ctx); | |
1557 | return count; | |
1558 | } | |
1559 | ||
1560 | ctx->qiov.size = count; | |
1561 | blk_aio_pwrite_zeroes(blk, ctx->offset, count, flags, aio_write_done, | |
1562 | ctx); | |
1563 | } else { | |
1564 | nr_iov = argc - optind; | |
1565 | ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, | |
1566 | pattern); | |
1567 | if (ctx->buf == NULL) { | |
1568 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); | |
1569 | g_free(ctx); | |
1570 | return -EINVAL; | |
1571 | } | |
1572 | ||
1573 | gettimeofday(&ctx->t1, NULL); | |
1574 | block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, | |
1575 | BLOCK_ACCT_WRITE); | |
1576 | ||
1577 | blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, flags, aio_write_done, | |
1578 | ctx); | |
1579 | } | |
1580 | ||
1581 | return 0; | |
1582 | } | |
1583 | ||
1584 | static int aio_flush_f(BlockBackend *blk, int argc, char **argv) | |
1585 | { | |
1586 | BlockAcctCookie cookie; | |
1587 | block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH); | |
1588 | blk_drain_all(); | |
1589 | block_acct_done(blk_get_stats(blk), &cookie); | |
1590 | return 0; | |
1591 | } | |
1592 | ||
1593 | static const cmdinfo_t aio_flush_cmd = { | |
1594 | .name = "aio_flush", | |
1595 | .cfunc = aio_flush_f, | |
1596 | .oneline = "completes all outstanding aio requests" | |
1597 | }; | |
1598 | ||
1599 | static int flush_f(BlockBackend *blk, int argc, char **argv) | |
1600 | { | |
1601 | return blk_flush(blk); | |
1602 | } | |
1603 | ||
1604 | static const cmdinfo_t flush_cmd = { | |
1605 | .name = "flush", | |
1606 | .altname = "f", | |
1607 | .cfunc = flush_f, | |
1608 | .oneline = "flush all in-core file state to disk", | |
1609 | }; | |
1610 | ||
1611 | static int truncate_f(BlockBackend *blk, int argc, char **argv) | |
1612 | { | |
1613 | Error *local_err = NULL; | |
1614 | int64_t offset; | |
1615 | int ret; | |
1616 | ||
1617 | offset = cvtnum(argv[1]); | |
1618 | if (offset < 0) { | |
1619 | print_cvtnum_err(offset, argv[1]); | |
1620 | return offset; | |
1621 | } | |
1622 | ||
1623 | ret = blk_truncate(blk, offset, PREALLOC_MODE_OFF, &local_err); | |
1624 | if (ret < 0) { | |
1625 | error_report_err(local_err); | |
1626 | return ret; | |
1627 | } | |
1628 | ||
1629 | return 0; | |
1630 | } | |
1631 | ||
1632 | static const cmdinfo_t truncate_cmd = { | |
1633 | .name = "truncate", | |
1634 | .altname = "t", | |
1635 | .cfunc = truncate_f, | |
1636 | .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE, | |
1637 | .argmin = 1, | |
1638 | .argmax = 1, | |
1639 | .args = "off", | |
1640 | .oneline = "truncates the current file at the given offset", | |
1641 | }; | |
1642 | ||
1643 | static int length_f(BlockBackend *blk, int argc, char **argv) | |
1644 | { | |
1645 | int64_t size; | |
1646 | char s1[64]; | |
1647 | ||
1648 | size = blk_getlength(blk); | |
1649 | if (size < 0) { | |
1650 | printf("getlength: %s\n", strerror(-size)); | |
1651 | return size; | |
1652 | } | |
1653 | ||
1654 | cvtstr(size, s1, sizeof(s1)); | |
1655 | printf("%s\n", s1); | |
1656 | return 0; | |
1657 | } | |
1658 | ||
1659 | ||
1660 | static const cmdinfo_t length_cmd = { | |
1661 | .name = "length", | |
1662 | .altname = "l", | |
1663 | .cfunc = length_f, | |
1664 | .oneline = "gets the length of the current file", | |
1665 | }; | |
1666 | ||
1667 | ||
1668 | static int info_f(BlockBackend *blk, int argc, char **argv) | |
1669 | { | |
1670 | BlockDriverState *bs = blk_bs(blk); | |
1671 | BlockDriverInfo bdi; | |
1672 | ImageInfoSpecific *spec_info; | |
1673 | Error *local_err = NULL; | |
1674 | char s1[64], s2[64]; | |
1675 | int ret; | |
1676 | ||
1677 | if (bs->drv && bs->drv->format_name) { | |
1678 | printf("format name: %s\n", bs->drv->format_name); | |
1679 | } | |
1680 | if (bs->drv && bs->drv->protocol_name) { | |
1681 | printf("format name: %s\n", bs->drv->protocol_name); | |
1682 | } | |
1683 | ||
1684 | ret = bdrv_get_info(bs, &bdi); | |
1685 | if (ret) { | |
1686 | return ret; | |
1687 | } | |
1688 | ||
1689 | cvtstr(bdi.cluster_size, s1, sizeof(s1)); | |
1690 | cvtstr(bdi.vm_state_offset, s2, sizeof(s2)); | |
1691 | ||
1692 | printf("cluster size: %s\n", s1); | |
1693 | printf("vm state offset: %s\n", s2); | |
1694 | ||
1695 | spec_info = bdrv_get_specific_info(bs, &local_err); | |
1696 | if (local_err) { | |
1697 | error_report_err(local_err); | |
1698 | return -EIO; | |
1699 | } | |
1700 | if (spec_info) { | |
1701 | printf("Format specific information:\n"); | |
1702 | bdrv_image_info_specific_dump(spec_info); | |
1703 | qapi_free_ImageInfoSpecific(spec_info); | |
1704 | } | |
1705 | ||
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | ||
1710 | ||
1711 | static const cmdinfo_t info_cmd = { | |
1712 | .name = "info", | |
1713 | .altname = "i", | |
1714 | .cfunc = info_f, | |
1715 | .oneline = "prints information about the current file", | |
1716 | }; | |
1717 | ||
1718 | static void discard_help(void) | |
1719 | { | |
1720 | printf( | |
1721 | "\n" | |
1722 | " discards a range of bytes from the given offset\n" | |
1723 | "\n" | |
1724 | " Example:\n" | |
1725 | " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n" | |
1726 | "\n" | |
1727 | " Discards a segment of the currently open file.\n" | |
1728 | " -C, -- report statistics in a machine parsable format\n" | |
1729 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1730 | "\n"); | |
1731 | } | |
1732 | ||
1733 | static int discard_f(BlockBackend *blk, int argc, char **argv); | |
1734 | ||
1735 | static const cmdinfo_t discard_cmd = { | |
1736 | .name = "discard", | |
1737 | .altname = "d", | |
1738 | .cfunc = discard_f, | |
1739 | .perm = BLK_PERM_WRITE, | |
1740 | .argmin = 2, | |
1741 | .argmax = -1, | |
1742 | .args = "[-Cq] off len", | |
1743 | .oneline = "discards a number of bytes at a specified offset", | |
1744 | .help = discard_help, | |
1745 | }; | |
1746 | ||
1747 | static int discard_f(BlockBackend *blk, int argc, char **argv) | |
1748 | { | |
1749 | struct timeval t1, t2; | |
1750 | bool Cflag = false, qflag = false; | |
1751 | int c, ret; | |
1752 | int64_t offset, bytes; | |
1753 | ||
1754 | while ((c = getopt(argc, argv, "Cq")) != -1) { | |
1755 | switch (c) { | |
1756 | case 'C': | |
1757 | Cflag = true; | |
1758 | break; | |
1759 | case 'q': | |
1760 | qflag = true; | |
1761 | break; | |
1762 | default: | |
1763 | qemuio_command_usage(&discard_cmd); | |
1764 | return -EINVAL; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | if (optind != argc - 2) { | |
1769 | qemuio_command_usage(&discard_cmd); | |
1770 | return -EINVAL; | |
1771 | } | |
1772 | ||
1773 | offset = cvtnum(argv[optind]); | |
1774 | if (offset < 0) { | |
1775 | print_cvtnum_err(offset, argv[optind]); | |
1776 | return offset; | |
1777 | } | |
1778 | ||
1779 | optind++; | |
1780 | bytes = cvtnum(argv[optind]); | |
1781 | if (bytes < 0) { | |
1782 | print_cvtnum_err(bytes, argv[optind]); | |
1783 | return bytes; | |
1784 | } else if (bytes > BDRV_REQUEST_MAX_BYTES) { | |
1785 | printf("length cannot exceed %"PRIu64", given %s\n", | |
1786 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
1787 | return -EINVAL; | |
1788 | } | |
1789 | ||
1790 | gettimeofday(&t1, NULL); | |
1791 | ret = blk_pdiscard(blk, offset, bytes); | |
1792 | gettimeofday(&t2, NULL); | |
1793 | ||
1794 | if (ret < 0) { | |
1795 | printf("discard failed: %s\n", strerror(-ret)); | |
1796 | return ret; | |
1797 | } | |
1798 | ||
1799 | /* Finally, report back -- -C gives a parsable format */ | |
1800 | if (!qflag) { | |
1801 | t2 = tsub(t2, t1); | |
1802 | print_report("discard", &t2, offset, bytes, bytes, 1, Cflag); | |
1803 | } | |
1804 | ||
1805 | return 0; | |
1806 | } | |
1807 | ||
1808 | static int alloc_f(BlockBackend *blk, int argc, char **argv) | |
1809 | { | |
1810 | BlockDriverState *bs = blk_bs(blk); | |
1811 | int64_t offset, start, remaining, count; | |
1812 | char s1[64]; | |
1813 | int ret; | |
1814 | int64_t num, sum_alloc; | |
1815 | ||
1816 | start = offset = cvtnum(argv[1]); | |
1817 | if (offset < 0) { | |
1818 | print_cvtnum_err(offset, argv[1]); | |
1819 | return offset; | |
1820 | } | |
1821 | ||
1822 | if (argc == 3) { | |
1823 | count = cvtnum(argv[2]); | |
1824 | if (count < 0) { | |
1825 | print_cvtnum_err(count, argv[2]); | |
1826 | return count; | |
1827 | } | |
1828 | } else { | |
1829 | count = BDRV_SECTOR_SIZE; | |
1830 | } | |
1831 | ||
1832 | remaining = count; | |
1833 | sum_alloc = 0; | |
1834 | while (remaining) { | |
1835 | ret = bdrv_is_allocated(bs, offset, remaining, &num); | |
1836 | if (ret < 0) { | |
1837 | printf("is_allocated failed: %s\n", strerror(-ret)); | |
1838 | return ret; | |
1839 | } | |
1840 | offset += num; | |
1841 | remaining -= num; | |
1842 | if (ret) { | |
1843 | sum_alloc += num; | |
1844 | } | |
1845 | if (num == 0) { | |
1846 | count -= remaining; | |
1847 | remaining = 0; | |
1848 | } | |
1849 | } | |
1850 | ||
1851 | cvtstr(start, s1, sizeof(s1)); | |
1852 | ||
1853 | printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n", | |
1854 | sum_alloc, count, s1); | |
1855 | return 0; | |
1856 | } | |
1857 | ||
1858 | static const cmdinfo_t alloc_cmd = { | |
1859 | .name = "alloc", | |
1860 | .altname = "a", | |
1861 | .argmin = 1, | |
1862 | .argmax = 2, | |
1863 | .cfunc = alloc_f, | |
1864 | .args = "offset [count]", | |
1865 | .oneline = "checks if offset is allocated in the file", | |
1866 | }; | |
1867 | ||
1868 | ||
1869 | static int map_is_allocated(BlockDriverState *bs, int64_t offset, | |
1870 | int64_t bytes, int64_t *pnum) | |
1871 | { | |
1872 | int64_t num; | |
1873 | int num_checked; | |
1874 | int ret, firstret; | |
1875 | ||
1876 | num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES); | |
1877 | ret = bdrv_is_allocated(bs, offset, num_checked, &num); | |
1878 | if (ret < 0) { | |
1879 | return ret; | |
1880 | } | |
1881 | ||
1882 | firstret = ret; | |
1883 | *pnum = num; | |
1884 | ||
1885 | while (bytes > 0 && ret == firstret) { | |
1886 | offset += num; | |
1887 | bytes -= num; | |
1888 | ||
1889 | num_checked = MIN(bytes, BDRV_REQUEST_MAX_BYTES); | |
1890 | ret = bdrv_is_allocated(bs, offset, num_checked, &num); | |
1891 | if (ret == firstret && num) { | |
1892 | *pnum += num; | |
1893 | } else { | |
1894 | break; | |
1895 | } | |
1896 | } | |
1897 | ||
1898 | return firstret; | |
1899 | } | |
1900 | ||
1901 | static int map_f(BlockBackend *blk, int argc, char **argv) | |
1902 | { | |
1903 | int64_t offset, bytes; | |
1904 | char s1[64], s2[64]; | |
1905 | int64_t num; | |
1906 | int ret; | |
1907 | const char *retstr; | |
1908 | ||
1909 | offset = 0; | |
1910 | bytes = blk_getlength(blk); | |
1911 | if (bytes < 0) { | |
1912 | error_report("Failed to query image length: %s", strerror(-bytes)); | |
1913 | return bytes; | |
1914 | } | |
1915 | ||
1916 | while (bytes) { | |
1917 | ret = map_is_allocated(blk_bs(blk), offset, bytes, &num); | |
1918 | if (ret < 0) { | |
1919 | error_report("Failed to get allocation status: %s", strerror(-ret)); | |
1920 | return ret; | |
1921 | } else if (!num) { | |
1922 | error_report("Unexpected end of image"); | |
1923 | return -EIO; | |
1924 | } | |
1925 | ||
1926 | retstr = ret ? " allocated" : "not allocated"; | |
1927 | cvtstr(num, s1, sizeof(s1)); | |
1928 | cvtstr(offset, s2, sizeof(s2)); | |
1929 | printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n", | |
1930 | s1, num, retstr, s2, offset); | |
1931 | ||
1932 | offset += num; | |
1933 | bytes -= num; | |
1934 | } | |
1935 | ||
1936 | return 0; | |
1937 | } | |
1938 | ||
1939 | static const cmdinfo_t map_cmd = { | |
1940 | .name = "map", | |
1941 | .argmin = 0, | |
1942 | .argmax = 0, | |
1943 | .cfunc = map_f, | |
1944 | .args = "", | |
1945 | .oneline = "prints the allocated areas of a file", | |
1946 | }; | |
1947 | ||
1948 | static void reopen_help(void) | |
1949 | { | |
1950 | printf( | |
1951 | "\n" | |
1952 | " Changes the open options of an already opened image\n" | |
1953 | "\n" | |
1954 | " Example:\n" | |
1955 | " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n" | |
1956 | "\n" | |
1957 | " -r, -- Reopen the image read-only\n" | |
1958 | " -w, -- Reopen the image read-write\n" | |
1959 | " -c, -- Change the cache mode to the given value\n" | |
1960 | " -o, -- Changes block driver options (cf. 'open' command)\n" | |
1961 | "\n"); | |
1962 | } | |
1963 | ||
1964 | static int reopen_f(BlockBackend *blk, int argc, char **argv); | |
1965 | ||
1966 | static QemuOptsList reopen_opts = { | |
1967 | .name = "reopen", | |
1968 | .merge_lists = true, | |
1969 | .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head), | |
1970 | .desc = { | |
1971 | /* no elements => accept any params */ | |
1972 | { /* end of list */ } | |
1973 | }, | |
1974 | }; | |
1975 | ||
1976 | static const cmdinfo_t reopen_cmd = { | |
1977 | .name = "reopen", | |
1978 | .argmin = 0, | |
1979 | .argmax = -1, | |
1980 | .cfunc = reopen_f, | |
1981 | .args = "[(-r|-w)] [-c cache] [-o options]", | |
1982 | .oneline = "reopens an image with new options", | |
1983 | .help = reopen_help, | |
1984 | }; | |
1985 | ||
1986 | static int reopen_f(BlockBackend *blk, int argc, char **argv) | |
1987 | { | |
1988 | BlockDriverState *bs = blk_bs(blk); | |
1989 | QemuOpts *qopts; | |
1990 | QDict *opts; | |
1991 | int c; | |
1992 | int flags = bs->open_flags; | |
1993 | bool writethrough = !blk_enable_write_cache(blk); | |
1994 | bool has_rw_option = false; | |
1995 | bool has_cache_option = false; | |
1996 | ||
1997 | BlockReopenQueue *brq; | |
1998 | Error *local_err = NULL; | |
1999 | ||
2000 | while ((c = getopt(argc, argv, "c:o:rw")) != -1) { | |
2001 | switch (c) { | |
2002 | case 'c': | |
2003 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) { | |
2004 | error_report("Invalid cache option: %s", optarg); | |
2005 | return -EINVAL; | |
2006 | } | |
2007 | has_cache_option = true; | |
2008 | break; | |
2009 | case 'o': | |
2010 | if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) { | |
2011 | qemu_opts_reset(&reopen_opts); | |
2012 | return -EINVAL; | |
2013 | } | |
2014 | break; | |
2015 | case 'r': | |
2016 | if (has_rw_option) { | |
2017 | error_report("Only one -r/-w option may be given"); | |
2018 | return -EINVAL; | |
2019 | } | |
2020 | flags &= ~BDRV_O_RDWR; | |
2021 | has_rw_option = true; | |
2022 | break; | |
2023 | case 'w': | |
2024 | if (has_rw_option) { | |
2025 | error_report("Only one -r/-w option may be given"); | |
2026 | return -EINVAL; | |
2027 | } | |
2028 | flags |= BDRV_O_RDWR; | |
2029 | has_rw_option = true; | |
2030 | break; | |
2031 | default: | |
2032 | qemu_opts_reset(&reopen_opts); | |
2033 | qemuio_command_usage(&reopen_cmd); | |
2034 | return -EINVAL; | |
2035 | } | |
2036 | } | |
2037 | ||
2038 | if (optind != argc) { | |
2039 | qemu_opts_reset(&reopen_opts); | |
2040 | qemuio_command_usage(&reopen_cmd); | |
2041 | return -EINVAL; | |
2042 | } | |
2043 | ||
2044 | if (!writethrough != blk_enable_write_cache(blk) && | |
2045 | blk_get_attached_dev(blk)) | |
2046 | { | |
2047 | error_report("Cannot change cache.writeback: Device attached"); | |
2048 | qemu_opts_reset(&reopen_opts); | |
2049 | return -EBUSY; | |
2050 | } | |
2051 | ||
2052 | if (!(flags & BDRV_O_RDWR)) { | |
2053 | uint64_t orig_perm, orig_shared_perm; | |
2054 | ||
2055 | bdrv_drain(bs); | |
2056 | ||
2057 | blk_get_perm(blk, &orig_perm, &orig_shared_perm); | |
2058 | blk_set_perm(blk, | |
2059 | orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED), | |
2060 | orig_shared_perm, | |
2061 | &error_abort); | |
2062 | } | |
2063 | ||
2064 | qopts = qemu_opts_find(&reopen_opts, NULL); | |
2065 | opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new(); | |
2066 | qemu_opts_reset(&reopen_opts); | |
2067 | ||
2068 | if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) { | |
2069 | if (has_rw_option) { | |
2070 | error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'"); | |
2071 | qobject_unref(opts); | |
2072 | return -EINVAL; | |
2073 | } | |
2074 | } else { | |
2075 | qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR)); | |
2076 | } | |
2077 | ||
2078 | if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) || | |
2079 | qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) { | |
2080 | if (has_cache_option) { | |
2081 | error_report("Cannot set both -c and the cache options"); | |
2082 | qobject_unref(opts); | |
2083 | return -EINVAL; | |
2084 | } | |
2085 | } else { | |
2086 | qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE); | |
2087 | qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH); | |
2088 | } | |
2089 | ||
2090 | bdrv_subtree_drained_begin(bs); | |
2091 | brq = bdrv_reopen_queue(NULL, bs, opts, true); | |
2092 | bdrv_reopen_multiple(brq, &local_err); | |
2093 | bdrv_subtree_drained_end(bs); | |
2094 | ||
2095 | if (local_err) { | |
2096 | error_report_err(local_err); | |
2097 | return -EINVAL; | |
2098 | } | |
2099 | ||
2100 | blk_set_enable_write_cache(blk, !writethrough); | |
2101 | return 0; | |
2102 | } | |
2103 | ||
2104 | static int break_f(BlockBackend *blk, int argc, char **argv) | |
2105 | { | |
2106 | int ret; | |
2107 | ||
2108 | ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]); | |
2109 | if (ret < 0) { | |
2110 | printf("Could not set breakpoint: %s\n", strerror(-ret)); | |
2111 | return ret; | |
2112 | } | |
2113 | ||
2114 | return 0; | |
2115 | } | |
2116 | ||
2117 | static int remove_break_f(BlockBackend *blk, int argc, char **argv) | |
2118 | { | |
2119 | int ret; | |
2120 | ||
2121 | ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]); | |
2122 | if (ret < 0) { | |
2123 | printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret)); | |
2124 | return ret; | |
2125 | } | |
2126 | ||
2127 | return 0; | |
2128 | } | |
2129 | ||
2130 | static const cmdinfo_t break_cmd = { | |
2131 | .name = "break", | |
2132 | .argmin = 2, | |
2133 | .argmax = 2, | |
2134 | .cfunc = break_f, | |
2135 | .args = "event tag", | |
2136 | .oneline = "sets a breakpoint on event and tags the stopped " | |
2137 | "request as tag", | |
2138 | }; | |
2139 | ||
2140 | static const cmdinfo_t remove_break_cmd = { | |
2141 | .name = "remove_break", | |
2142 | .argmin = 1, | |
2143 | .argmax = 1, | |
2144 | .cfunc = remove_break_f, | |
2145 | .args = "tag", | |
2146 | .oneline = "remove a breakpoint by tag", | |
2147 | }; | |
2148 | ||
2149 | static int resume_f(BlockBackend *blk, int argc, char **argv) | |
2150 | { | |
2151 | int ret; | |
2152 | ||
2153 | ret = bdrv_debug_resume(blk_bs(blk), argv[1]); | |
2154 | if (ret < 0) { | |
2155 | printf("Could not resume request: %s\n", strerror(-ret)); | |
2156 | return ret; | |
2157 | } | |
2158 | ||
2159 | return 0; | |
2160 | } | |
2161 | ||
2162 | static const cmdinfo_t resume_cmd = { | |
2163 | .name = "resume", | |
2164 | .argmin = 1, | |
2165 | .argmax = 1, | |
2166 | .cfunc = resume_f, | |
2167 | .args = "tag", | |
2168 | .oneline = "resumes the request tagged as tag", | |
2169 | }; | |
2170 | ||
2171 | static int wait_break_f(BlockBackend *blk, int argc, char **argv) | |
2172 | { | |
2173 | while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) { | |
2174 | aio_poll(blk_get_aio_context(blk), true); | |
2175 | } | |
2176 | return 0; | |
2177 | } | |
2178 | ||
2179 | static const cmdinfo_t wait_break_cmd = { | |
2180 | .name = "wait_break", | |
2181 | .argmin = 1, | |
2182 | .argmax = 1, | |
2183 | .cfunc = wait_break_f, | |
2184 | .args = "tag", | |
2185 | .oneline = "waits for the suspension of a request", | |
2186 | }; | |
2187 | ||
2188 | static int abort_f(BlockBackend *blk, int argc, char **argv) | |
2189 | { | |
2190 | abort(); | |
2191 | } | |
2192 | ||
2193 | static const cmdinfo_t abort_cmd = { | |
2194 | .name = "abort", | |
2195 | .cfunc = abort_f, | |
2196 | .flags = CMD_NOFILE_OK, | |
2197 | .oneline = "simulate a program crash using abort(3)", | |
2198 | }; | |
2199 | ||
2200 | static void sigraise_help(void) | |
2201 | { | |
2202 | printf( | |
2203 | "\n" | |
2204 | " raises the given signal\n" | |
2205 | "\n" | |
2206 | " Example:\n" | |
2207 | " 'sigraise %i' - raises SIGTERM\n" | |
2208 | "\n" | |
2209 | " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n" | |
2210 | " given to sigraise.\n" | |
2211 | "\n", SIGTERM); | |
2212 | } | |
2213 | ||
2214 | static int sigraise_f(BlockBackend *blk, int argc, char **argv); | |
2215 | ||
2216 | static const cmdinfo_t sigraise_cmd = { | |
2217 | .name = "sigraise", | |
2218 | .cfunc = sigraise_f, | |
2219 | .argmin = 1, | |
2220 | .argmax = 1, | |
2221 | .flags = CMD_NOFILE_OK, | |
2222 | .args = "signal", | |
2223 | .oneline = "raises a signal", | |
2224 | .help = sigraise_help, | |
2225 | }; | |
2226 | ||
2227 | static int sigraise_f(BlockBackend *blk, int argc, char **argv) | |
2228 | { | |
2229 | int64_t sig = cvtnum(argv[1]); | |
2230 | if (sig < 0) { | |
2231 | print_cvtnum_err(sig, argv[1]); | |
2232 | return sig; | |
2233 | } else if (sig > NSIG) { | |
2234 | printf("signal argument '%s' is too large to be a valid signal\n", | |
2235 | argv[1]); | |
2236 | return -EINVAL; | |
2237 | } | |
2238 | ||
2239 | /* Using raise() to kill this process does not necessarily flush all open | |
2240 | * streams. At least stdout and stderr (although the latter should be | |
2241 | * non-buffered anyway) should be flushed, though. */ | |
2242 | fflush(stdout); | |
2243 | fflush(stderr); | |
2244 | ||
2245 | raise(sig); | |
2246 | ||
2247 | return 0; | |
2248 | } | |
2249 | ||
2250 | static void sleep_cb(void *opaque) | |
2251 | { | |
2252 | bool *expired = opaque; | |
2253 | *expired = true; | |
2254 | } | |
2255 | ||
2256 | static int sleep_f(BlockBackend *blk, int argc, char **argv) | |
2257 | { | |
2258 | char *endptr; | |
2259 | long ms; | |
2260 | struct QEMUTimer *timer; | |
2261 | bool expired = false; | |
2262 | ||
2263 | ms = strtol(argv[1], &endptr, 0); | |
2264 | if (ms < 0 || *endptr != '\0') { | |
2265 | printf("%s is not a valid number\n", argv[1]); | |
2266 | return -EINVAL; | |
2267 | } | |
2268 | ||
2269 | timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired); | |
2270 | timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms); | |
2271 | ||
2272 | while (!expired) { | |
2273 | main_loop_wait(false); | |
2274 | } | |
2275 | ||
2276 | timer_free(timer); | |
2277 | return 0; | |
2278 | } | |
2279 | ||
2280 | static const cmdinfo_t sleep_cmd = { | |
2281 | .name = "sleep", | |
2282 | .argmin = 1, | |
2283 | .argmax = 1, | |
2284 | .cfunc = sleep_f, | |
2285 | .flags = CMD_NOFILE_OK, | |
2286 | .oneline = "waits for the given value in milliseconds", | |
2287 | }; | |
2288 | ||
2289 | static void help_oneline(const char *cmd, const cmdinfo_t *ct) | |
2290 | { | |
2291 | if (cmd) { | |
2292 | printf("%s ", cmd); | |
2293 | } else { | |
2294 | printf("%s ", ct->name); | |
2295 | if (ct->altname) { | |
2296 | printf("(or %s) ", ct->altname); | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | if (ct->args) { | |
2301 | printf("%s ", ct->args); | |
2302 | } | |
2303 | printf("-- %s\n", ct->oneline); | |
2304 | } | |
2305 | ||
2306 | static void help_onecmd(const char *cmd, const cmdinfo_t *ct) | |
2307 | { | |
2308 | help_oneline(cmd, ct); | |
2309 | if (ct->help) { | |
2310 | ct->help(); | |
2311 | } | |
2312 | } | |
2313 | ||
2314 | static void help_all(void) | |
2315 | { | |
2316 | const cmdinfo_t *ct; | |
2317 | ||
2318 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
2319 | help_oneline(ct->name, ct); | |
2320 | } | |
2321 | printf("\nUse 'help commandname' for extended help.\n"); | |
2322 | } | |
2323 | ||
2324 | static int help_f(BlockBackend *blk, int argc, char **argv) | |
2325 | { | |
2326 | const cmdinfo_t *ct; | |
2327 | ||
2328 | if (argc == 1) { | |
2329 | help_all(); | |
2330 | return 0; | |
2331 | } | |
2332 | ||
2333 | ct = find_command(argv[1]); | |
2334 | if (ct == NULL) { | |
2335 | printf("command %s not found\n", argv[1]); | |
2336 | return -EINVAL; | |
2337 | } | |
2338 | ||
2339 | help_onecmd(argv[1], ct); | |
2340 | return 0; | |
2341 | } | |
2342 | ||
2343 | static const cmdinfo_t help_cmd = { | |
2344 | .name = "help", | |
2345 | .altname = "?", | |
2346 | .cfunc = help_f, | |
2347 | .argmin = 0, | |
2348 | .argmax = 1, | |
2349 | .flags = CMD_FLAG_GLOBAL, | |
2350 | .args = "[command]", | |
2351 | .oneline = "help for one or all commands", | |
2352 | }; | |
2353 | ||
2354 | int qemuio_command(BlockBackend *blk, const char *cmd) | |
2355 | { | |
2356 | AioContext *ctx; | |
2357 | char *input; | |
2358 | const cmdinfo_t *ct; | |
2359 | char **v; | |
2360 | int c; | |
2361 | int ret = 0; | |
2362 | ||
2363 | input = g_strdup(cmd); | |
2364 | v = breakline(input, &c); | |
2365 | if (c) { | |
2366 | ct = find_command(v[0]); | |
2367 | if (ct) { | |
2368 | ctx = blk ? blk_get_aio_context(blk) : qemu_get_aio_context(); | |
2369 | aio_context_acquire(ctx); | |
2370 | ret = command(blk, ct, c, v); | |
2371 | aio_context_release(ctx); | |
2372 | } else { | |
2373 | fprintf(stderr, "command \"%s\" not found\n", v[0]); | |
2374 | ret = -EINVAL; | |
2375 | } | |
2376 | } | |
2377 | g_free(input); | |
2378 | g_free(v); | |
2379 | ||
2380 | return ret; | |
2381 | } | |
2382 | ||
2383 | static void __attribute((constructor)) init_qemuio_commands(void) | |
2384 | { | |
2385 | /* initialize commands */ | |
2386 | qemuio_add_command(&help_cmd); | |
2387 | qemuio_add_command(&read_cmd); | |
2388 | qemuio_add_command(&readv_cmd); | |
2389 | qemuio_add_command(&write_cmd); | |
2390 | qemuio_add_command(&writev_cmd); | |
2391 | qemuio_add_command(&aio_read_cmd); | |
2392 | qemuio_add_command(&aio_write_cmd); | |
2393 | qemuio_add_command(&aio_flush_cmd); | |
2394 | qemuio_add_command(&flush_cmd); | |
2395 | qemuio_add_command(&truncate_cmd); | |
2396 | qemuio_add_command(&length_cmd); | |
2397 | qemuio_add_command(&info_cmd); | |
2398 | qemuio_add_command(&discard_cmd); | |
2399 | qemuio_add_command(&alloc_cmd); | |
2400 | qemuio_add_command(&map_cmd); | |
2401 | qemuio_add_command(&reopen_cmd); | |
2402 | qemuio_add_command(&break_cmd); | |
2403 | qemuio_add_command(&remove_break_cmd); | |
2404 | qemuio_add_command(&resume_cmd); | |
2405 | qemuio_add_command(&wait_break_cmd); | |
2406 | qemuio_add_command(&abort_cmd); | |
2407 | qemuio_add_command(&sleep_cmd); | |
2408 | qemuio_add_command(&sigraise_cmd); | |
2409 | } |