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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 | #include "qemu/memalign.h" | |
25 | ||
26 | #define CMD_NOFILE_OK 0x01 | |
27 | ||
28 | bool qemuio_misalign; | |
29 | ||
30 | static cmdinfo_t *cmdtab; | |
31 | static int ncmds; | |
32 | ||
33 | static int compare_cmdname(const void *a, const void *b) | |
34 | { | |
35 | return strcmp(((const cmdinfo_t *)a)->name, | |
36 | ((const cmdinfo_t *)b)->name); | |
37 | } | |
38 | ||
39 | void qemuio_add_command(const cmdinfo_t *ci) | |
40 | { | |
41 | /* ci->perm assumes a file is open, but the GLOBAL and NOFILE_OK | |
42 | * flags allow it not to be, so that combination is invalid. | |
43 | * Catch it now rather than letting it manifest as a crash if a | |
44 | * particular set of command line options are used. | |
45 | */ | |
46 | assert(ci->perm == 0 || | |
47 | (ci->flags & (CMD_FLAG_GLOBAL | CMD_NOFILE_OK)) == 0); | |
48 | cmdtab = g_renew(cmdinfo_t, cmdtab, ++ncmds); | |
49 | cmdtab[ncmds - 1] = *ci; | |
50 | qsort(cmdtab, ncmds, sizeof(*cmdtab), compare_cmdname); | |
51 | } | |
52 | ||
53 | void qemuio_command_usage(const cmdinfo_t *ci) | |
54 | { | |
55 | printf("%s %s -- %s\n", ci->name, ci->args, ci->oneline); | |
56 | } | |
57 | ||
58 | static int init_check_command(BlockBackend *blk, const cmdinfo_t *ct) | |
59 | { | |
60 | if (ct->flags & CMD_FLAG_GLOBAL) { | |
61 | return 1; | |
62 | } | |
63 | if (!(ct->flags & CMD_NOFILE_OK) && !blk) { | |
64 | fprintf(stderr, "no file open, try 'help open'\n"); | |
65 | return 0; | |
66 | } | |
67 | return 1; | |
68 | } | |
69 | ||
70 | static int command(BlockBackend *blk, const cmdinfo_t *ct, int argc, | |
71 | char **argv) | |
72 | { | |
73 | char *cmd = argv[0]; | |
74 | ||
75 | if (!init_check_command(blk, ct)) { | |
76 | return -EINVAL; | |
77 | } | |
78 | ||
79 | if (argc - 1 < ct->argmin || (ct->argmax != -1 && argc - 1 > ct->argmax)) { | |
80 | if (ct->argmax == -1) { | |
81 | fprintf(stderr, | |
82 | "bad argument count %d to %s, expected at least %d arguments\n", | |
83 | argc-1, cmd, ct->argmin); | |
84 | } else if (ct->argmin == ct->argmax) { | |
85 | fprintf(stderr, | |
86 | "bad argument count %d to %s, expected %d arguments\n", | |
87 | argc-1, cmd, ct->argmin); | |
88 | } else { | |
89 | fprintf(stderr, | |
90 | "bad argument count %d to %s, expected between %d and %d arguments\n", | |
91 | argc-1, cmd, ct->argmin, ct->argmax); | |
92 | } | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
96 | /* | |
97 | * Request additional permissions if necessary for this command. The caller | |
98 | * is responsible for restoring the original permissions afterwards if this | |
99 | * is what it wants. | |
100 | * | |
101 | * Coverity thinks that blk may be NULL in the following if condition. It's | |
102 | * not so: in init_check_command() we fail if blk is NULL for command with | |
103 | * both CMD_FLAG_GLOBAL and CMD_NOFILE_OK flags unset. And in | |
104 | * qemuio_add_command() we assert that command with non-zero .perm field | |
105 | * doesn't set this flags. So, the following assertion is to silence | |
106 | * Coverity: | |
107 | */ | |
108 | assert(blk || !ct->perm); | |
109 | if (ct->perm && blk_is_available(blk)) { | |
110 | uint64_t orig_perm, orig_shared_perm; | |
111 | blk_get_perm(blk, &orig_perm, &orig_shared_perm); | |
112 | ||
113 | if (ct->perm & ~orig_perm) { | |
114 | uint64_t new_perm; | |
115 | Error *local_err = NULL; | |
116 | int ret; | |
117 | ||
118 | new_perm = orig_perm | ct->perm; | |
119 | ||
120 | ret = blk_set_perm(blk, new_perm, orig_shared_perm, &local_err); | |
121 | if (ret < 0) { | |
122 | error_report_err(local_err); | |
123 | return ret; | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | qemu_reset_optind(); | |
129 | return ct->cfunc(blk, argc, argv); | |
130 | } | |
131 | ||
132 | static const cmdinfo_t *find_command(const char *cmd) | |
133 | { | |
134 | cmdinfo_t *ct; | |
135 | ||
136 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
137 | if (strcmp(ct->name, cmd) == 0 || | |
138 | (ct->altname && strcmp(ct->altname, cmd) == 0)) | |
139 | { | |
140 | return (const cmdinfo_t *)ct; | |
141 | } | |
142 | } | |
143 | return NULL; | |
144 | } | |
145 | ||
146 | /* Invoke fn() for commands with a matching prefix */ | |
147 | void qemuio_complete_command(const char *input, | |
148 | void (*fn)(const char *cmd, void *opaque), | |
149 | void *opaque) | |
150 | { | |
151 | cmdinfo_t *ct; | |
152 | size_t input_len = strlen(input); | |
153 | ||
154 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
155 | if (strncmp(input, ct->name, input_len) == 0) { | |
156 | fn(ct->name, opaque); | |
157 | } | |
158 | } | |
159 | } | |
160 | ||
161 | static char **breakline(char *input, int *count) | |
162 | { | |
163 | int c = 0; | |
164 | char *p; | |
165 | char **rval = g_new0(char *, 1); | |
166 | ||
167 | while (rval && (p = qemu_strsep(&input, " ")) != NULL) { | |
168 | if (!*p) { | |
169 | continue; | |
170 | } | |
171 | c++; | |
172 | rval = g_renew(char *, rval, (c + 1)); | |
173 | rval[c - 1] = p; | |
174 | rval[c] = NULL; | |
175 | } | |
176 | *count = c; | |
177 | return rval; | |
178 | } | |
179 | ||
180 | static int64_t cvtnum(const char *s) | |
181 | { | |
182 | int err; | |
183 | uint64_t value; | |
184 | ||
185 | err = qemu_strtosz(s, NULL, &value); | |
186 | if (err < 0) { | |
187 | return err; | |
188 | } | |
189 | if (value > INT64_MAX) { | |
190 | return -ERANGE; | |
191 | } | |
192 | return value; | |
193 | } | |
194 | ||
195 | static void print_cvtnum_err(int64_t rc, const char *arg) | |
196 | { | |
197 | switch (rc) { | |
198 | case -EINVAL: | |
199 | printf("Parsing error: non-numeric argument," | |
200 | " or extraneous/unrecognized suffix -- %s\n", arg); | |
201 | break; | |
202 | case -ERANGE: | |
203 | printf("Parsing error: argument too large -- %s\n", arg); | |
204 | break; | |
205 | default: | |
206 | printf("Parsing error: %s\n", arg); | |
207 | } | |
208 | } | |
209 | ||
210 | #define EXABYTES(x) ((long long)(x) << 60) | |
211 | #define PETABYTES(x) ((long long)(x) << 50) | |
212 | #define TERABYTES(x) ((long long)(x) << 40) | |
213 | #define GIGABYTES(x) ((long long)(x) << 30) | |
214 | #define MEGABYTES(x) ((long long)(x) << 20) | |
215 | #define KILOBYTES(x) ((long long)(x) << 10) | |
216 | ||
217 | #define TO_EXABYTES(x) ((x) / EXABYTES(1)) | |
218 | #define TO_PETABYTES(x) ((x) / PETABYTES(1)) | |
219 | #define TO_TERABYTES(x) ((x) / TERABYTES(1)) | |
220 | #define TO_GIGABYTES(x) ((x) / GIGABYTES(1)) | |
221 | #define TO_MEGABYTES(x) ((x) / MEGABYTES(1)) | |
222 | #define TO_KILOBYTES(x) ((x) / KILOBYTES(1)) | |
223 | ||
224 | static void cvtstr(double value, char *str, size_t size) | |
225 | { | |
226 | char *trim; | |
227 | const char *suffix; | |
228 | ||
229 | if (value >= EXABYTES(1)) { | |
230 | suffix = " EiB"; | |
231 | snprintf(str, size - 4, "%.3f", TO_EXABYTES(value)); | |
232 | } else if (value >= PETABYTES(1)) { | |
233 | suffix = " PiB"; | |
234 | snprintf(str, size - 4, "%.3f", TO_PETABYTES(value)); | |
235 | } else if (value >= TERABYTES(1)) { | |
236 | suffix = " TiB"; | |
237 | snprintf(str, size - 4, "%.3f", TO_TERABYTES(value)); | |
238 | } else if (value >= GIGABYTES(1)) { | |
239 | suffix = " GiB"; | |
240 | snprintf(str, size - 4, "%.3f", TO_GIGABYTES(value)); | |
241 | } else if (value >= MEGABYTES(1)) { | |
242 | suffix = " MiB"; | |
243 | snprintf(str, size - 4, "%.3f", TO_MEGABYTES(value)); | |
244 | } else if (value >= KILOBYTES(1)) { | |
245 | suffix = " KiB"; | |
246 | snprintf(str, size - 4, "%.3f", TO_KILOBYTES(value)); | |
247 | } else { | |
248 | suffix = " bytes"; | |
249 | snprintf(str, size - 6, "%f", value); | |
250 | } | |
251 | ||
252 | trim = strstr(str, ".000"); | |
253 | if (trim) { | |
254 | strcpy(trim, suffix); | |
255 | } else { | |
256 | strcat(str, suffix); | |
257 | } | |
258 | } | |
259 | ||
260 | ||
261 | ||
262 | static struct timespec tsub(struct timespec t1, struct timespec t2) | |
263 | { | |
264 | t1.tv_nsec -= t2.tv_nsec; | |
265 | if (t1.tv_nsec < 0) { | |
266 | t1.tv_nsec += NANOSECONDS_PER_SECOND; | |
267 | t1.tv_sec--; | |
268 | } | |
269 | t1.tv_sec -= t2.tv_sec; | |
270 | return t1; | |
271 | } | |
272 | ||
273 | static double tdiv(double value, struct timespec tv) | |
274 | { | |
275 | double seconds = tv.tv_sec + (tv.tv_nsec / 1e9); | |
276 | return value / seconds; | |
277 | } | |
278 | ||
279 | #define HOURS(sec) ((sec) / (60 * 60)) | |
280 | #define MINUTES(sec) (((sec) % (60 * 60)) / 60) | |
281 | #define SECONDS(sec) ((sec) % 60) | |
282 | ||
283 | enum { | |
284 | DEFAULT_TIME = 0x0, | |
285 | TERSE_FIXED_TIME = 0x1, | |
286 | VERBOSE_FIXED_TIME = 0x2, | |
287 | }; | |
288 | ||
289 | static void timestr(struct timespec *tv, char *ts, size_t size, int format) | |
290 | { | |
291 | double frac_sec = tv->tv_nsec / 1e9; | |
292 | ||
293 | if (format & TERSE_FIXED_TIME) { | |
294 | if (!HOURS(tv->tv_sec)) { | |
295 | snprintf(ts, size, "%u:%05.2f", | |
296 | (unsigned int) MINUTES(tv->tv_sec), | |
297 | SECONDS(tv->tv_sec) + frac_sec); | |
298 | return; | |
299 | } | |
300 | format |= VERBOSE_FIXED_TIME; /* fallback if hours needed */ | |
301 | } | |
302 | ||
303 | if ((format & VERBOSE_FIXED_TIME) || tv->tv_sec) { | |
304 | snprintf(ts, size, "%u:%02u:%05.2f", | |
305 | (unsigned int) HOURS(tv->tv_sec), | |
306 | (unsigned int) MINUTES(tv->tv_sec), | |
307 | SECONDS(tv->tv_sec) + frac_sec); | |
308 | } else { | |
309 | snprintf(ts, size, "%05.2f sec", frac_sec); | |
310 | } | |
311 | } | |
312 | ||
313 | /* | |
314 | * Parse the pattern argument to various sub-commands. | |
315 | * | |
316 | * Because the pattern is used as an argument to memset it must evaluate | |
317 | * to an unsigned integer that fits into a single byte. | |
318 | */ | |
319 | static int parse_pattern(const char *arg) | |
320 | { | |
321 | char *endptr = NULL; | |
322 | long pattern; | |
323 | ||
324 | pattern = strtol(arg, &endptr, 0); | |
325 | if (pattern < 0 || pattern > UCHAR_MAX || *endptr != '\0') { | |
326 | printf("%s is not a valid pattern byte\n", arg); | |
327 | return -1; | |
328 | } | |
329 | ||
330 | return pattern; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Memory allocation helpers. | |
335 | * | |
336 | * Make sure memory is aligned by default, or purposefully misaligned if | |
337 | * that is specified on the command line. | |
338 | */ | |
339 | ||
340 | #define MISALIGN_OFFSET 16 | |
341 | static void *qemu_io_alloc(BlockBackend *blk, size_t len, int pattern, | |
342 | bool register_buf) | |
343 | { | |
344 | void *buf; | |
345 | ||
346 | if (qemuio_misalign) { | |
347 | len += MISALIGN_OFFSET; | |
348 | } | |
349 | buf = blk_blockalign(blk, len); | |
350 | memset(buf, pattern, len); | |
351 | if (register_buf) { | |
352 | blk_register_buf(blk, buf, len, &error_abort); | |
353 | } | |
354 | if (qemuio_misalign) { | |
355 | buf += MISALIGN_OFFSET; | |
356 | } | |
357 | return buf; | |
358 | } | |
359 | ||
360 | static void qemu_io_free(BlockBackend *blk, void *p, size_t len, | |
361 | bool unregister_buf) | |
362 | { | |
363 | if (qemuio_misalign) { | |
364 | p -= MISALIGN_OFFSET; | |
365 | len += MISALIGN_OFFSET; | |
366 | } | |
367 | if (unregister_buf) { | |
368 | blk_unregister_buf(blk, p, len); | |
369 | } | |
370 | qemu_vfree(p); | |
371 | } | |
372 | ||
373 | /* | |
374 | * qemu_io_alloc_from_file() | |
375 | * | |
376 | * Allocates the buffer and populates it with the content of the given file | |
377 | * up to @len bytes. If the file length is less than @len, then the buffer | |
378 | * is populated with the file content cyclically. | |
379 | * | |
380 | * @blk - the block backend where the buffer content is going to be written to | |
381 | * @len - the buffer length | |
382 | * @file_name - the file to read the content from | |
383 | * @register_buf - call blk_register_buf() | |
384 | * | |
385 | * Returns: the buffer pointer on success | |
386 | * NULL on error | |
387 | */ | |
388 | static void *qemu_io_alloc_from_file(BlockBackend *blk, size_t len, | |
389 | const char *file_name, bool register_buf) | |
390 | { | |
391 | size_t alloc_len = len + (qemuio_misalign ? MISALIGN_OFFSET : 0); | |
392 | char *alloc_buf, *buf, *end; | |
393 | FILE *f = fopen(file_name, "r"); | |
394 | int pattern_len; | |
395 | ||
396 | if (!f) { | |
397 | perror(file_name); | |
398 | return NULL; | |
399 | } | |
400 | ||
401 | alloc_buf = buf = blk_blockalign(blk, alloc_len); | |
402 | ||
403 | if (qemuio_misalign) { | |
404 | buf += MISALIGN_OFFSET; | |
405 | } | |
406 | ||
407 | pattern_len = fread(buf, 1, len, f); | |
408 | ||
409 | if (ferror(f)) { | |
410 | perror(file_name); | |
411 | goto error; | |
412 | } | |
413 | ||
414 | if (pattern_len == 0) { | |
415 | fprintf(stderr, "%s: file is empty\n", file_name); | |
416 | goto error; | |
417 | } | |
418 | ||
419 | fclose(f); | |
420 | f = NULL; | |
421 | ||
422 | if (register_buf) { | |
423 | blk_register_buf(blk, alloc_buf, alloc_len, &error_abort); | |
424 | } | |
425 | ||
426 | end = buf + len; | |
427 | for (char *p = buf + pattern_len; p < end; p += pattern_len) { | |
428 | memcpy(p, buf, MIN(pattern_len, end - p)); | |
429 | } | |
430 | ||
431 | return buf; | |
432 | ||
433 | error: | |
434 | /* | |
435 | * This code path is only taken before blk_register_buf() is called, so | |
436 | * hardcode the qemu_io_free() unregister_buf argument to false. | |
437 | */ | |
438 | qemu_io_free(blk, alloc_buf, alloc_len, false); | |
439 | if (f) { | |
440 | fclose(f); | |
441 | } | |
442 | return NULL; | |
443 | } | |
444 | ||
445 | static void dump_buffer(const void *buffer, int64_t offset, int64_t len) | |
446 | { | |
447 | uint64_t i; | |
448 | int j; | |
449 | const uint8_t *p; | |
450 | ||
451 | for (i = 0, p = buffer; i < len; i += 16) { | |
452 | const uint8_t *s = p; | |
453 | ||
454 | printf("%08" PRIx64 ": ", offset + i); | |
455 | for (j = 0; j < 16 && i + j < len; j++, p++) { | |
456 | printf("%02x ", *p); | |
457 | } | |
458 | printf(" "); | |
459 | for (j = 0; j < 16 && i + j < len; j++, s++) { | |
460 | if (isalnum(*s)) { | |
461 | printf("%c", *s); | |
462 | } else { | |
463 | printf("."); | |
464 | } | |
465 | } | |
466 | printf("\n"); | |
467 | } | |
468 | } | |
469 | ||
470 | static void print_report(const char *op, struct timespec *t, int64_t offset, | |
471 | int64_t count, int64_t total, int cnt, bool Cflag) | |
472 | { | |
473 | char s1[64], s2[64], ts[64]; | |
474 | ||
475 | timestr(t, ts, sizeof(ts), Cflag ? VERBOSE_FIXED_TIME : 0); | |
476 | if (!Cflag) { | |
477 | cvtstr((double)total, s1, sizeof(s1)); | |
478 | cvtstr(tdiv((double)total, *t), s2, sizeof(s2)); | |
479 | printf("%s %"PRId64"/%"PRId64" bytes at offset %" PRId64 "\n", | |
480 | op, total, count, offset); | |
481 | printf("%s, %d ops; %s (%s/sec and %.4f ops/sec)\n", | |
482 | s1, cnt, ts, s2, tdiv((double)cnt, *t)); | |
483 | } else {/* bytes,ops,time,bytes/sec,ops/sec */ | |
484 | printf("%"PRId64",%d,%s,%.3f,%.3f\n", | |
485 | total, cnt, ts, | |
486 | tdiv((double)total, *t), | |
487 | tdiv((double)cnt, *t)); | |
488 | } | |
489 | } | |
490 | ||
491 | /* | |
492 | * Parse multiple length statements for vectored I/O, and construct an I/O | |
493 | * vector matching it. | |
494 | */ | |
495 | static void * | |
496 | create_iovec(BlockBackend *blk, QEMUIOVector *qiov, char **argv, int nr_iov, | |
497 | int pattern, bool register_buf) | |
498 | { | |
499 | size_t *sizes = g_new0(size_t, nr_iov); | |
500 | size_t count = 0; | |
501 | void *buf = NULL; | |
502 | void *p; | |
503 | int i; | |
504 | ||
505 | for (i = 0; i < nr_iov; i++) { | |
506 | char *arg = argv[i]; | |
507 | int64_t len; | |
508 | ||
509 | len = cvtnum(arg); | |
510 | if (len < 0) { | |
511 | print_cvtnum_err(len, arg); | |
512 | goto fail; | |
513 | } | |
514 | ||
515 | if (len > BDRV_REQUEST_MAX_BYTES) { | |
516 | printf("Argument '%s' exceeds maximum size %" PRIu64 "\n", arg, | |
517 | (uint64_t)BDRV_REQUEST_MAX_BYTES); | |
518 | goto fail; | |
519 | } | |
520 | ||
521 | if (count > BDRV_REQUEST_MAX_BYTES - len) { | |
522 | printf("The total number of bytes exceed the maximum size %" PRIu64 | |
523 | "\n", (uint64_t)BDRV_REQUEST_MAX_BYTES); | |
524 | goto fail; | |
525 | } | |
526 | ||
527 | sizes[i] = len; | |
528 | count += len; | |
529 | } | |
530 | ||
531 | qemu_iovec_init(qiov, nr_iov); | |
532 | ||
533 | buf = p = qemu_io_alloc(blk, count, pattern, register_buf); | |
534 | ||
535 | for (i = 0; i < nr_iov; i++) { | |
536 | qemu_iovec_add(qiov, p, sizes[i]); | |
537 | p += sizes[i]; | |
538 | } | |
539 | ||
540 | fail: | |
541 | g_free(sizes); | |
542 | return buf; | |
543 | } | |
544 | ||
545 | static int do_pread(BlockBackend *blk, char *buf, int64_t offset, | |
546 | int64_t bytes, BdrvRequestFlags flags, int64_t *total) | |
547 | { | |
548 | int ret; | |
549 | ||
550 | if (bytes > INT_MAX) { | |
551 | return -ERANGE; | |
552 | } | |
553 | ||
554 | ret = blk_pread(blk, offset, bytes, (uint8_t *)buf, flags); | |
555 | if (ret < 0) { | |
556 | return ret; | |
557 | } | |
558 | *total = bytes; | |
559 | return 1; | |
560 | } | |
561 | ||
562 | static int do_pwrite(BlockBackend *blk, char *buf, int64_t offset, | |
563 | int64_t bytes, BdrvRequestFlags flags, int64_t *total) | |
564 | { | |
565 | int ret; | |
566 | ||
567 | if (bytes > INT_MAX) { | |
568 | return -ERANGE; | |
569 | } | |
570 | ||
571 | ret = blk_pwrite(blk, offset, bytes, (uint8_t *)buf, flags); | |
572 | if (ret < 0) { | |
573 | return ret; | |
574 | } | |
575 | *total = bytes; | |
576 | return 1; | |
577 | } | |
578 | ||
579 | static int do_pwrite_zeroes(BlockBackend *blk, int64_t offset, | |
580 | int64_t bytes, BdrvRequestFlags flags, | |
581 | int64_t *total) | |
582 | { | |
583 | int ret = blk_pwrite_zeroes(blk, offset, bytes, | |
584 | flags | BDRV_REQ_ZERO_WRITE); | |
585 | ||
586 | if (ret < 0) { | |
587 | return ret; | |
588 | } | |
589 | *total = bytes; | |
590 | return 1; | |
591 | } | |
592 | ||
593 | static int do_write_compressed(BlockBackend *blk, char *buf, int64_t offset, | |
594 | int64_t bytes, int64_t *total) | |
595 | { | |
596 | int ret; | |
597 | ||
598 | if (bytes > BDRV_REQUEST_MAX_BYTES) { | |
599 | return -ERANGE; | |
600 | } | |
601 | ||
602 | ret = blk_pwrite_compressed(blk, offset, bytes, buf); | |
603 | if (ret < 0) { | |
604 | return ret; | |
605 | } | |
606 | *total = bytes; | |
607 | return 1; | |
608 | } | |
609 | ||
610 | static int do_load_vmstate(BlockBackend *blk, char *buf, int64_t offset, | |
611 | int64_t count, int64_t *total) | |
612 | { | |
613 | if (count > INT_MAX) { | |
614 | return -ERANGE; | |
615 | } | |
616 | ||
617 | *total = blk_load_vmstate(blk, (uint8_t *)buf, offset, count); | |
618 | if (*total < 0) { | |
619 | return *total; | |
620 | } | |
621 | return 1; | |
622 | } | |
623 | ||
624 | static int do_save_vmstate(BlockBackend *blk, char *buf, int64_t offset, | |
625 | int64_t count, int64_t *total) | |
626 | { | |
627 | if (count > INT_MAX) { | |
628 | return -ERANGE; | |
629 | } | |
630 | ||
631 | *total = blk_save_vmstate(blk, (uint8_t *)buf, offset, count); | |
632 | if (*total < 0) { | |
633 | return *total; | |
634 | } | |
635 | return 1; | |
636 | } | |
637 | ||
638 | #define NOT_DONE 0x7fffffff | |
639 | static void aio_rw_done(void *opaque, int ret) | |
640 | { | |
641 | *(int *)opaque = ret; | |
642 | } | |
643 | ||
644 | static int do_aio_readv(BlockBackend *blk, QEMUIOVector *qiov, | |
645 | int64_t offset, BdrvRequestFlags flags, int *total) | |
646 | { | |
647 | int async_ret = NOT_DONE; | |
648 | ||
649 | blk_aio_preadv(blk, offset, qiov, flags, aio_rw_done, &async_ret); | |
650 | while (async_ret == NOT_DONE) { | |
651 | main_loop_wait(false); | |
652 | } | |
653 | ||
654 | *total = qiov->size; | |
655 | return async_ret < 0 ? async_ret : 1; | |
656 | } | |
657 | ||
658 | static int do_aio_writev(BlockBackend *blk, QEMUIOVector *qiov, | |
659 | int64_t offset, BdrvRequestFlags flags, int *total) | |
660 | { | |
661 | int async_ret = NOT_DONE; | |
662 | ||
663 | blk_aio_pwritev(blk, offset, qiov, flags, aio_rw_done, &async_ret); | |
664 | while (async_ret == NOT_DONE) { | |
665 | main_loop_wait(false); | |
666 | } | |
667 | ||
668 | *total = qiov->size; | |
669 | return async_ret < 0 ? async_ret : 1; | |
670 | } | |
671 | ||
672 | static void read_help(void) | |
673 | { | |
674 | printf( | |
675 | "\n" | |
676 | " reads a range of bytes from the given offset\n" | |
677 | "\n" | |
678 | " Example:\n" | |
679 | " 'read -v 512 1k' - dumps 1 kilobyte read from 512 bytes into the file\n" | |
680 | "\n" | |
681 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
682 | " standard output stream (with -v option) for subsequent inspection.\n" | |
683 | " -b, -- read from the VM state rather than the virtual disk\n" | |
684 | " -C, -- report statistics in a machine parsable format\n" | |
685 | " -l, -- length for pattern verification (only with -P)\n" | |
686 | " -p, -- ignored for backwards compatibility\n" | |
687 | " -P, -- use a pattern to verify read data\n" | |
688 | " -q, -- quiet mode, do not show I/O statistics\n" | |
689 | " -r, -- register I/O buffer\n" | |
690 | " -s, -- start offset for pattern verification (only with -P)\n" | |
691 | " -v, -- dump buffer to standard output\n" | |
692 | "\n"); | |
693 | } | |
694 | ||
695 | static int read_f(BlockBackend *blk, int argc, char **argv); | |
696 | ||
697 | static const cmdinfo_t read_cmd = { | |
698 | .name = "read", | |
699 | .altname = "r", | |
700 | .cfunc = read_f, | |
701 | .argmin = 2, | |
702 | .argmax = -1, | |
703 | .args = "[-abCqrv] [-P pattern [-s off] [-l len]] off len", | |
704 | .oneline = "reads a number of bytes at a specified offset", | |
705 | .help = read_help, | |
706 | }; | |
707 | ||
708 | static int read_f(BlockBackend *blk, int argc, char **argv) | |
709 | { | |
710 | struct timespec t1, t2; | |
711 | bool Cflag = false, qflag = false, vflag = false; | |
712 | bool Pflag = false, sflag = false, lflag = false, bflag = false; | |
713 | int c, cnt, ret; | |
714 | char *buf; | |
715 | int64_t offset; | |
716 | int64_t count; | |
717 | /* Some compilers get confused and warn if this is not initialized. */ | |
718 | int64_t total = 0; | |
719 | int pattern = 0; | |
720 | int64_t pattern_offset = 0, pattern_count = 0; | |
721 | BdrvRequestFlags flags = 0; | |
722 | ||
723 | while ((c = getopt(argc, argv, "bCl:pP:qrs:v")) != -1) { | |
724 | switch (c) { | |
725 | case 'b': | |
726 | bflag = true; | |
727 | break; | |
728 | case 'C': | |
729 | Cflag = true; | |
730 | break; | |
731 | case 'l': | |
732 | lflag = true; | |
733 | pattern_count = cvtnum(optarg); | |
734 | if (pattern_count < 0) { | |
735 | print_cvtnum_err(pattern_count, optarg); | |
736 | return pattern_count; | |
737 | } | |
738 | break; | |
739 | case 'p': | |
740 | /* Ignored for backwards compatibility */ | |
741 | break; | |
742 | case 'P': | |
743 | Pflag = true; | |
744 | pattern = parse_pattern(optarg); | |
745 | if (pattern < 0) { | |
746 | return -EINVAL; | |
747 | } | |
748 | break; | |
749 | case 'q': | |
750 | qflag = true; | |
751 | break; | |
752 | case 'r': | |
753 | flags |= BDRV_REQ_REGISTERED_BUF; | |
754 | break; | |
755 | case 's': | |
756 | sflag = true; | |
757 | pattern_offset = cvtnum(optarg); | |
758 | if (pattern_offset < 0) { | |
759 | print_cvtnum_err(pattern_offset, optarg); | |
760 | return pattern_offset; | |
761 | } | |
762 | break; | |
763 | case 'v': | |
764 | vflag = true; | |
765 | break; | |
766 | default: | |
767 | qemuio_command_usage(&read_cmd); | |
768 | return -EINVAL; | |
769 | } | |
770 | } | |
771 | ||
772 | if (optind != argc - 2) { | |
773 | qemuio_command_usage(&read_cmd); | |
774 | return -EINVAL; | |
775 | } | |
776 | ||
777 | offset = cvtnum(argv[optind]); | |
778 | if (offset < 0) { | |
779 | print_cvtnum_err(offset, argv[optind]); | |
780 | return offset; | |
781 | } | |
782 | ||
783 | optind++; | |
784 | count = cvtnum(argv[optind]); | |
785 | if (count < 0) { | |
786 | print_cvtnum_err(count, argv[optind]); | |
787 | return count; | |
788 | } else if (count > BDRV_REQUEST_MAX_BYTES) { | |
789 | printf("length cannot exceed %" PRIu64 ", given %s\n", | |
790 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
791 | return -EINVAL; | |
792 | } | |
793 | ||
794 | if (!Pflag && (lflag || sflag)) { | |
795 | qemuio_command_usage(&read_cmd); | |
796 | return -EINVAL; | |
797 | } | |
798 | ||
799 | if (!lflag) { | |
800 | pattern_count = count - pattern_offset; | |
801 | } | |
802 | ||
803 | if ((pattern_count < 0) || (pattern_count + pattern_offset > count)) { | |
804 | printf("pattern verification range exceeds end of read data\n"); | |
805 | return -EINVAL; | |
806 | } | |
807 | ||
808 | if (bflag) { | |
809 | if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { | |
810 | printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", | |
811 | offset); | |
812 | return -EINVAL; | |
813 | } | |
814 | if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { | |
815 | printf("%"PRId64" is not a sector-aligned value for 'count'\n", | |
816 | count); | |
817 | return -EINVAL; | |
818 | } | |
819 | if (flags & BDRV_REQ_REGISTERED_BUF) { | |
820 | printf("I/O buffer registration is not supported when reading " | |
821 | "from vmstate\n"); | |
822 | return -EINVAL; | |
823 | } | |
824 | } | |
825 | ||
826 | buf = qemu_io_alloc(blk, count, 0xab, flags & BDRV_REQ_REGISTERED_BUF); | |
827 | ||
828 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
829 | if (bflag) { | |
830 | ret = do_load_vmstate(blk, buf, offset, count, &total); | |
831 | } else { | |
832 | ret = do_pread(blk, buf, offset, count, flags, &total); | |
833 | } | |
834 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
835 | ||
836 | if (ret < 0) { | |
837 | printf("read failed: %s\n", strerror(-ret)); | |
838 | goto out; | |
839 | } | |
840 | cnt = ret; | |
841 | ||
842 | ret = 0; | |
843 | ||
844 | if (Pflag) { | |
845 | void *cmp_buf = g_malloc(pattern_count); | |
846 | memset(cmp_buf, pattern, pattern_count); | |
847 | if (memcmp(buf + pattern_offset, cmp_buf, pattern_count)) { | |
848 | printf("Pattern verification failed at offset %" | |
849 | PRId64 ", %"PRId64" bytes\n", | |
850 | offset + pattern_offset, pattern_count); | |
851 | ret = -EINVAL; | |
852 | } | |
853 | g_free(cmp_buf); | |
854 | } | |
855 | ||
856 | if (qflag) { | |
857 | goto out; | |
858 | } | |
859 | ||
860 | if (vflag) { | |
861 | dump_buffer(buf, offset, count); | |
862 | } | |
863 | ||
864 | /* Finally, report back -- -C gives a parsable format */ | |
865 | t2 = tsub(t2, t1); | |
866 | print_report("read", &t2, offset, count, total, cnt, Cflag); | |
867 | ||
868 | out: | |
869 | qemu_io_free(blk, buf, count, flags & BDRV_REQ_REGISTERED_BUF); | |
870 | return ret; | |
871 | } | |
872 | ||
873 | static void readv_help(void) | |
874 | { | |
875 | printf( | |
876 | "\n" | |
877 | " reads a range of bytes from the given offset into multiple buffers\n" | |
878 | "\n" | |
879 | " Example:\n" | |
880 | " 'readv -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" | |
881 | "\n" | |
882 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
883 | " standard output stream (with -v option) for subsequent inspection.\n" | |
884 | " Uses multiple iovec buffers if more than one byte range is specified.\n" | |
885 | " -C, -- report statistics in a machine parsable format\n" | |
886 | " -P, -- use a pattern to verify read data\n" | |
887 | " -q, -- quiet mode, do not show I/O statistics\n" | |
888 | " -r, -- register I/O buffer\n" | |
889 | " -v, -- dump buffer to standard output\n" | |
890 | "\n"); | |
891 | } | |
892 | ||
893 | static int readv_f(BlockBackend *blk, int argc, char **argv); | |
894 | ||
895 | static const cmdinfo_t readv_cmd = { | |
896 | .name = "readv", | |
897 | .cfunc = readv_f, | |
898 | .argmin = 2, | |
899 | .argmax = -1, | |
900 | .args = "[-Cqrv] [-P pattern] off len [len..]", | |
901 | .oneline = "reads a number of bytes at a specified offset", | |
902 | .help = readv_help, | |
903 | }; | |
904 | ||
905 | static int readv_f(BlockBackend *blk, int argc, char **argv) | |
906 | { | |
907 | struct timespec t1, t2; | |
908 | bool Cflag = false, qflag = false, vflag = false; | |
909 | int c, cnt, ret; | |
910 | char *buf; | |
911 | int64_t offset; | |
912 | /* Some compilers get confused and warn if this is not initialized. */ | |
913 | int total = 0; | |
914 | int nr_iov; | |
915 | QEMUIOVector qiov; | |
916 | int pattern = 0; | |
917 | bool Pflag = false; | |
918 | BdrvRequestFlags flags = 0; | |
919 | ||
920 | while ((c = getopt(argc, argv, "CP:qrv")) != -1) { | |
921 | switch (c) { | |
922 | case 'C': | |
923 | Cflag = true; | |
924 | break; | |
925 | case 'P': | |
926 | Pflag = true; | |
927 | pattern = parse_pattern(optarg); | |
928 | if (pattern < 0) { | |
929 | return -EINVAL; | |
930 | } | |
931 | break; | |
932 | case 'q': | |
933 | qflag = true; | |
934 | break; | |
935 | case 'r': | |
936 | flags |= BDRV_REQ_REGISTERED_BUF; | |
937 | break; | |
938 | case 'v': | |
939 | vflag = true; | |
940 | break; | |
941 | default: | |
942 | qemuio_command_usage(&readv_cmd); | |
943 | return -EINVAL; | |
944 | } | |
945 | } | |
946 | ||
947 | if (optind > argc - 2) { | |
948 | qemuio_command_usage(&readv_cmd); | |
949 | return -EINVAL; | |
950 | } | |
951 | ||
952 | ||
953 | offset = cvtnum(argv[optind]); | |
954 | if (offset < 0) { | |
955 | print_cvtnum_err(offset, argv[optind]); | |
956 | return offset; | |
957 | } | |
958 | optind++; | |
959 | ||
960 | nr_iov = argc - optind; | |
961 | buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, 0xab, | |
962 | flags & BDRV_REQ_REGISTERED_BUF); | |
963 | if (buf == NULL) { | |
964 | return -EINVAL; | |
965 | } | |
966 | ||
967 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
968 | ret = do_aio_readv(blk, &qiov, offset, flags, &total); | |
969 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
970 | ||
971 | if (ret < 0) { | |
972 | printf("readv failed: %s\n", strerror(-ret)); | |
973 | goto out; | |
974 | } | |
975 | cnt = ret; | |
976 | ||
977 | ret = 0; | |
978 | ||
979 | if (Pflag) { | |
980 | void *cmp_buf = g_malloc(qiov.size); | |
981 | memset(cmp_buf, pattern, qiov.size); | |
982 | if (memcmp(buf, cmp_buf, qiov.size)) { | |
983 | printf("Pattern verification failed at offset %" | |
984 | PRId64 ", %zu bytes\n", offset, qiov.size); | |
985 | ret = -EINVAL; | |
986 | } | |
987 | g_free(cmp_buf); | |
988 | } | |
989 | ||
990 | if (qflag) { | |
991 | goto out; | |
992 | } | |
993 | ||
994 | if (vflag) { | |
995 | dump_buffer(buf, offset, qiov.size); | |
996 | } | |
997 | ||
998 | /* Finally, report back -- -C gives a parsable format */ | |
999 | t2 = tsub(t2, t1); | |
1000 | print_report("read", &t2, offset, qiov.size, total, cnt, Cflag); | |
1001 | ||
1002 | out: | |
1003 | qemu_io_free(blk, buf, qiov.size, flags & BDRV_REQ_REGISTERED_BUF); | |
1004 | qemu_iovec_destroy(&qiov); | |
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | static void write_help(void) | |
1009 | { | |
1010 | printf( | |
1011 | "\n" | |
1012 | " writes a range of bytes from the given offset\n" | |
1013 | "\n" | |
1014 | " Example:\n" | |
1015 | " 'write 512 1k' - writes 1 kilobyte at 512 bytes into the open file\n" | |
1016 | "\n" | |
1017 | " Writes into a segment of the currently open file, using a buffer\n" | |
1018 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1019 | " -b, -- write to the VM state rather than the virtual disk\n" | |
1020 | " -c, -- write compressed data with blk_write_compressed\n" | |
1021 | " -C, -- report statistics in a machine parsable format\n" | |
1022 | " -f, -- use Force Unit Access semantics\n" | |
1023 | " -n, -- with -z, don't allow slow fallback\n" | |
1024 | " -p, -- ignored for backwards compatibility\n" | |
1025 | " -P, -- use different pattern to fill file\n" | |
1026 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1027 | " -r, -- register I/O buffer\n" | |
1028 | " -s, -- use a pattern file to fill the write buffer\n" | |
1029 | " -u, -- with -z, allow unmapping\n" | |
1030 | " -z, -- write zeroes using blk_pwrite_zeroes\n" | |
1031 | "\n"); | |
1032 | } | |
1033 | ||
1034 | static int write_f(BlockBackend *blk, int argc, char **argv); | |
1035 | ||
1036 | static const cmdinfo_t write_cmd = { | |
1037 | .name = "write", | |
1038 | .altname = "w", | |
1039 | .cfunc = write_f, | |
1040 | .perm = BLK_PERM_WRITE, | |
1041 | .argmin = 2, | |
1042 | .argmax = -1, | |
1043 | .args = "[-bcCfnqruz] [-P pattern | -s source_file] off len", | |
1044 | .oneline = "writes a number of bytes at a specified offset", | |
1045 | .help = write_help, | |
1046 | }; | |
1047 | ||
1048 | static int write_f(BlockBackend *blk, int argc, char **argv) | |
1049 | { | |
1050 | struct timespec t1, t2; | |
1051 | bool Cflag = false, qflag = false, bflag = false; | |
1052 | bool Pflag = false, zflag = false, cflag = false, sflag = false; | |
1053 | BdrvRequestFlags flags = 0; | |
1054 | int c, cnt, ret; | |
1055 | char *buf = NULL; | |
1056 | int64_t offset; | |
1057 | int64_t count; | |
1058 | /* Some compilers get confused and warn if this is not initialized. */ | |
1059 | int64_t total = 0; | |
1060 | int pattern = 0xcd; | |
1061 | const char *file_name = NULL; | |
1062 | ||
1063 | while ((c = getopt(argc, argv, "bcCfnpP:qrs:uz")) != -1) { | |
1064 | switch (c) { | |
1065 | case 'b': | |
1066 | bflag = true; | |
1067 | break; | |
1068 | case 'c': | |
1069 | cflag = true; | |
1070 | break; | |
1071 | case 'C': | |
1072 | Cflag = true; | |
1073 | break; | |
1074 | case 'f': | |
1075 | flags |= BDRV_REQ_FUA; | |
1076 | break; | |
1077 | case 'n': | |
1078 | flags |= BDRV_REQ_NO_FALLBACK; | |
1079 | break; | |
1080 | case 'p': | |
1081 | /* Ignored for backwards compatibility */ | |
1082 | break; | |
1083 | case 'P': | |
1084 | Pflag = true; | |
1085 | pattern = parse_pattern(optarg); | |
1086 | if (pattern < 0) { | |
1087 | return -EINVAL; | |
1088 | } | |
1089 | break; | |
1090 | case 'q': | |
1091 | qflag = true; | |
1092 | break; | |
1093 | case 'r': | |
1094 | flags |= BDRV_REQ_REGISTERED_BUF; | |
1095 | break; | |
1096 | case 's': | |
1097 | sflag = true; | |
1098 | file_name = optarg; | |
1099 | break; | |
1100 | case 'u': | |
1101 | flags |= BDRV_REQ_MAY_UNMAP; | |
1102 | break; | |
1103 | case 'z': | |
1104 | zflag = true; | |
1105 | break; | |
1106 | default: | |
1107 | qemuio_command_usage(&write_cmd); | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | if (optind != argc - 2) { | |
1113 | qemuio_command_usage(&write_cmd); | |
1114 | return -EINVAL; | |
1115 | } | |
1116 | ||
1117 | if (bflag && zflag) { | |
1118 | printf("-b and -z cannot be specified at the same time\n"); | |
1119 | return -EINVAL; | |
1120 | } | |
1121 | ||
1122 | if ((flags & BDRV_REQ_FUA) && (bflag || cflag)) { | |
1123 | printf("-f and -b or -c cannot be specified at the same time\n"); | |
1124 | return -EINVAL; | |
1125 | } | |
1126 | ||
1127 | if ((flags & BDRV_REQ_NO_FALLBACK) && !zflag) { | |
1128 | printf("-n requires -z to be specified\n"); | |
1129 | return -EINVAL; | |
1130 | } | |
1131 | ||
1132 | if ((flags & BDRV_REQ_MAY_UNMAP) && !zflag) { | |
1133 | printf("-u requires -z to be specified\n"); | |
1134 | return -EINVAL; | |
1135 | } | |
1136 | ||
1137 | if (zflag + Pflag + sflag > 1) { | |
1138 | printf("Only one of -z, -P, and -s " | |
1139 | "can be specified at the same time\n"); | |
1140 | return -EINVAL; | |
1141 | } | |
1142 | ||
1143 | offset = cvtnum(argv[optind]); | |
1144 | if (offset < 0) { | |
1145 | print_cvtnum_err(offset, argv[optind]); | |
1146 | return offset; | |
1147 | } | |
1148 | ||
1149 | optind++; | |
1150 | count = cvtnum(argv[optind]); | |
1151 | if (count < 0) { | |
1152 | print_cvtnum_err(count, argv[optind]); | |
1153 | return count; | |
1154 | } else if (count > BDRV_REQUEST_MAX_BYTES && | |
1155 | !(flags & BDRV_REQ_NO_FALLBACK)) { | |
1156 | printf("length cannot exceed %" PRIu64 " without -n, given %s\n", | |
1157 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
1158 | return -EINVAL; | |
1159 | } | |
1160 | ||
1161 | if (bflag || cflag) { | |
1162 | if (!QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)) { | |
1163 | printf("%" PRId64 " is not a sector-aligned value for 'offset'\n", | |
1164 | offset); | |
1165 | return -EINVAL; | |
1166 | } | |
1167 | ||
1168 | if (!QEMU_IS_ALIGNED(count, BDRV_SECTOR_SIZE)) { | |
1169 | printf("%"PRId64" is not a sector-aligned value for 'count'\n", | |
1170 | count); | |
1171 | return -EINVAL; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | if (zflag) { | |
1176 | if (flags & BDRV_REQ_REGISTERED_BUF) { | |
1177 | printf("cannot combine zero write with registered I/O buffer\n"); | |
1178 | return -EINVAL; | |
1179 | } | |
1180 | } else { | |
1181 | if (sflag) { | |
1182 | buf = qemu_io_alloc_from_file(blk, count, file_name, | |
1183 | flags & BDRV_REQ_REGISTERED_BUF); | |
1184 | if (!buf) { | |
1185 | return -EINVAL; | |
1186 | } | |
1187 | } else { | |
1188 | buf = qemu_io_alloc(blk, count, pattern, | |
1189 | flags & BDRV_REQ_REGISTERED_BUF); | |
1190 | } | |
1191 | } | |
1192 | ||
1193 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
1194 | if (bflag) { | |
1195 | ret = do_save_vmstate(blk, buf, offset, count, &total); | |
1196 | } else if (zflag) { | |
1197 | ret = do_pwrite_zeroes(blk, offset, count, flags, &total); | |
1198 | } else if (cflag) { | |
1199 | ret = do_write_compressed(blk, buf, offset, count, &total); | |
1200 | } else { | |
1201 | ret = do_pwrite(blk, buf, offset, count, flags, &total); | |
1202 | } | |
1203 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1204 | ||
1205 | if (ret < 0) { | |
1206 | printf("write failed: %s\n", strerror(-ret)); | |
1207 | goto out; | |
1208 | } | |
1209 | cnt = ret; | |
1210 | ||
1211 | ret = 0; | |
1212 | ||
1213 | if (qflag) { | |
1214 | goto out; | |
1215 | } | |
1216 | ||
1217 | /* Finally, report back -- -C gives a parsable format */ | |
1218 | t2 = tsub(t2, t1); | |
1219 | print_report("wrote", &t2, offset, count, total, cnt, Cflag); | |
1220 | ||
1221 | out: | |
1222 | if (!zflag) { | |
1223 | qemu_io_free(blk, buf, count, flags & BDRV_REQ_REGISTERED_BUF); | |
1224 | } | |
1225 | return ret; | |
1226 | } | |
1227 | ||
1228 | static void | |
1229 | writev_help(void) | |
1230 | { | |
1231 | printf( | |
1232 | "\n" | |
1233 | " writes a range of bytes from the given offset source from multiple buffers\n" | |
1234 | "\n" | |
1235 | " Example:\n" | |
1236 | " 'writev 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" | |
1237 | "\n" | |
1238 | " Writes into a segment of the currently open file, using a buffer\n" | |
1239 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1240 | " -C, -- report statistics in a machine parsable format\n" | |
1241 | " -f, -- use Force Unit Access semantics\n" | |
1242 | " -P, -- use different pattern to fill file\n" | |
1243 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1244 | " -r, -- register I/O buffer\n" | |
1245 | "\n"); | |
1246 | } | |
1247 | ||
1248 | static int writev_f(BlockBackend *blk, int argc, char **argv); | |
1249 | ||
1250 | static const cmdinfo_t writev_cmd = { | |
1251 | .name = "writev", | |
1252 | .cfunc = writev_f, | |
1253 | .perm = BLK_PERM_WRITE, | |
1254 | .argmin = 2, | |
1255 | .argmax = -1, | |
1256 | .args = "[-Cfqr] [-P pattern] off len [len..]", | |
1257 | .oneline = "writes a number of bytes at a specified offset", | |
1258 | .help = writev_help, | |
1259 | }; | |
1260 | ||
1261 | static int writev_f(BlockBackend *blk, int argc, char **argv) | |
1262 | { | |
1263 | struct timespec t1, t2; | |
1264 | bool Cflag = false, qflag = false; | |
1265 | BdrvRequestFlags flags = 0; | |
1266 | int c, cnt, ret; | |
1267 | char *buf; | |
1268 | int64_t offset; | |
1269 | /* Some compilers get confused and warn if this is not initialized. */ | |
1270 | int total = 0; | |
1271 | int nr_iov; | |
1272 | int pattern = 0xcd; | |
1273 | QEMUIOVector qiov; | |
1274 | ||
1275 | while ((c = getopt(argc, argv, "CfP:qr")) != -1) { | |
1276 | switch (c) { | |
1277 | case 'C': | |
1278 | Cflag = true; | |
1279 | break; | |
1280 | case 'f': | |
1281 | flags |= BDRV_REQ_FUA; | |
1282 | break; | |
1283 | case 'q': | |
1284 | qflag = true; | |
1285 | break; | |
1286 | case 'r': | |
1287 | flags |= BDRV_REQ_REGISTERED_BUF; | |
1288 | break; | |
1289 | case 'P': | |
1290 | pattern = parse_pattern(optarg); | |
1291 | if (pattern < 0) { | |
1292 | return -EINVAL; | |
1293 | } | |
1294 | break; | |
1295 | default: | |
1296 | qemuio_command_usage(&writev_cmd); | |
1297 | return -EINVAL; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | if (optind > argc - 2) { | |
1302 | qemuio_command_usage(&writev_cmd); | |
1303 | return -EINVAL; | |
1304 | } | |
1305 | ||
1306 | offset = cvtnum(argv[optind]); | |
1307 | if (offset < 0) { | |
1308 | print_cvtnum_err(offset, argv[optind]); | |
1309 | return offset; | |
1310 | } | |
1311 | optind++; | |
1312 | ||
1313 | nr_iov = argc - optind; | |
1314 | buf = create_iovec(blk, &qiov, &argv[optind], nr_iov, pattern, | |
1315 | flags & BDRV_REQ_REGISTERED_BUF); | |
1316 | if (buf == NULL) { | |
1317 | return -EINVAL; | |
1318 | } | |
1319 | ||
1320 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
1321 | ret = do_aio_writev(blk, &qiov, offset, flags, &total); | |
1322 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1323 | ||
1324 | if (ret < 0) { | |
1325 | printf("writev failed: %s\n", strerror(-ret)); | |
1326 | goto out; | |
1327 | } | |
1328 | cnt = ret; | |
1329 | ||
1330 | ret = 0; | |
1331 | ||
1332 | if (qflag) { | |
1333 | goto out; | |
1334 | } | |
1335 | ||
1336 | /* Finally, report back -- -C gives a parsable format */ | |
1337 | t2 = tsub(t2, t1); | |
1338 | print_report("wrote", &t2, offset, qiov.size, total, cnt, Cflag); | |
1339 | out: | |
1340 | qemu_io_free(blk, buf, qiov.size, flags & BDRV_REQ_REGISTERED_BUF); | |
1341 | qemu_iovec_destroy(&qiov); | |
1342 | return ret; | |
1343 | } | |
1344 | ||
1345 | struct aio_ctx { | |
1346 | BlockBackend *blk; | |
1347 | QEMUIOVector qiov; | |
1348 | int64_t offset; | |
1349 | char *buf; | |
1350 | bool qflag; | |
1351 | bool vflag; | |
1352 | bool Cflag; | |
1353 | bool Pflag; | |
1354 | bool zflag; | |
1355 | BlockAcctCookie acct; | |
1356 | int pattern; | |
1357 | BdrvRequestFlags flags; | |
1358 | struct timespec t1; | |
1359 | }; | |
1360 | ||
1361 | static void aio_write_done(void *opaque, int ret) | |
1362 | { | |
1363 | struct aio_ctx *ctx = opaque; | |
1364 | struct timespec t2; | |
1365 | ||
1366 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1367 | ||
1368 | ||
1369 | if (ret < 0) { | |
1370 | printf("aio_write failed: %s\n", strerror(-ret)); | |
1371 | block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); | |
1372 | goto out; | |
1373 | } | |
1374 | ||
1375 | block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); | |
1376 | ||
1377 | if (ctx->qflag) { | |
1378 | goto out; | |
1379 | } | |
1380 | ||
1381 | /* Finally, report back -- -C gives a parsable format */ | |
1382 | t2 = tsub(t2, ctx->t1); | |
1383 | print_report("wrote", &t2, ctx->offset, ctx->qiov.size, | |
1384 | ctx->qiov.size, 1, ctx->Cflag); | |
1385 | out: | |
1386 | if (!ctx->zflag) { | |
1387 | qemu_io_free(ctx->blk, ctx->buf, ctx->qiov.size, | |
1388 | ctx->flags & BDRV_REQ_REGISTERED_BUF); | |
1389 | qemu_iovec_destroy(&ctx->qiov); | |
1390 | } | |
1391 | g_free(ctx); | |
1392 | } | |
1393 | ||
1394 | static void aio_read_done(void *opaque, int ret) | |
1395 | { | |
1396 | struct aio_ctx *ctx = opaque; | |
1397 | struct timespec t2; | |
1398 | ||
1399 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1400 | ||
1401 | if (ret < 0) { | |
1402 | printf("readv failed: %s\n", strerror(-ret)); | |
1403 | block_acct_failed(blk_get_stats(ctx->blk), &ctx->acct); | |
1404 | goto out; | |
1405 | } | |
1406 | ||
1407 | if (ctx->Pflag) { | |
1408 | void *cmp_buf = g_malloc(ctx->qiov.size); | |
1409 | ||
1410 | memset(cmp_buf, ctx->pattern, ctx->qiov.size); | |
1411 | if (memcmp(ctx->buf, cmp_buf, ctx->qiov.size)) { | |
1412 | printf("Pattern verification failed at offset %" | |
1413 | PRId64 ", %zu bytes\n", ctx->offset, ctx->qiov.size); | |
1414 | } | |
1415 | g_free(cmp_buf); | |
1416 | } | |
1417 | ||
1418 | block_acct_done(blk_get_stats(ctx->blk), &ctx->acct); | |
1419 | ||
1420 | if (ctx->qflag) { | |
1421 | goto out; | |
1422 | } | |
1423 | ||
1424 | if (ctx->vflag) { | |
1425 | dump_buffer(ctx->buf, ctx->offset, ctx->qiov.size); | |
1426 | } | |
1427 | ||
1428 | /* Finally, report back -- -C gives a parsable format */ | |
1429 | t2 = tsub(t2, ctx->t1); | |
1430 | print_report("read", &t2, ctx->offset, ctx->qiov.size, | |
1431 | ctx->qiov.size, 1, ctx->Cflag); | |
1432 | out: | |
1433 | qemu_io_free(ctx->blk, ctx->buf, ctx->qiov.size, | |
1434 | ctx->flags & BDRV_REQ_REGISTERED_BUF); | |
1435 | qemu_iovec_destroy(&ctx->qiov); | |
1436 | g_free(ctx); | |
1437 | } | |
1438 | ||
1439 | static void aio_read_help(void) | |
1440 | { | |
1441 | printf( | |
1442 | "\n" | |
1443 | " asynchronously reads a range of bytes from the given offset\n" | |
1444 | "\n" | |
1445 | " Example:\n" | |
1446 | " 'aio_read -v 512 1k 1k ' - dumps 2 kilobytes read from 512 bytes into the file\n" | |
1447 | "\n" | |
1448 | " Reads a segment of the currently open file, optionally dumping it to the\n" | |
1449 | " standard output stream (with -v option) for subsequent inspection.\n" | |
1450 | " The read is performed asynchronously and the aio_flush command must be\n" | |
1451 | " used to ensure all outstanding aio requests have been completed.\n" | |
1452 | " Note that due to its asynchronous nature, this command will be\n" | |
1453 | " considered successful once the request is submitted, independently\n" | |
1454 | " of potential I/O errors or pattern mismatches.\n" | |
1455 | " -C, -- report statistics in a machine parsable format\n" | |
1456 | " -i, -- treat request as invalid, for exercising stats\n" | |
1457 | " -P, -- use a pattern to verify read data\n" | |
1458 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1459 | " -r, -- register I/O buffer\n" | |
1460 | " -v, -- dump buffer to standard output\n" | |
1461 | "\n"); | |
1462 | } | |
1463 | ||
1464 | static int aio_read_f(BlockBackend *blk, int argc, char **argv); | |
1465 | ||
1466 | static const cmdinfo_t aio_read_cmd = { | |
1467 | .name = "aio_read", | |
1468 | .cfunc = aio_read_f, | |
1469 | .argmin = 2, | |
1470 | .argmax = -1, | |
1471 | .args = "[-Ciqrv] [-P pattern] off len [len..]", | |
1472 | .oneline = "asynchronously reads a number of bytes", | |
1473 | .help = aio_read_help, | |
1474 | }; | |
1475 | ||
1476 | static int aio_read_f(BlockBackend *blk, int argc, char **argv) | |
1477 | { | |
1478 | int nr_iov, c; | |
1479 | struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); | |
1480 | ||
1481 | ctx->blk = blk; | |
1482 | while ((c = getopt(argc, argv, "CiP:qrv")) != -1) { | |
1483 | switch (c) { | |
1484 | case 'C': | |
1485 | ctx->Cflag = true; | |
1486 | break; | |
1487 | case 'P': | |
1488 | ctx->Pflag = true; | |
1489 | ctx->pattern = parse_pattern(optarg); | |
1490 | if (ctx->pattern < 0) { | |
1491 | g_free(ctx); | |
1492 | return -EINVAL; | |
1493 | } | |
1494 | break; | |
1495 | case 'i': | |
1496 | printf("injecting invalid read request\n"); | |
1497 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); | |
1498 | g_free(ctx); | |
1499 | return 0; | |
1500 | case 'q': | |
1501 | ctx->qflag = true; | |
1502 | break; | |
1503 | case 'r': | |
1504 | ctx->flags |= BDRV_REQ_REGISTERED_BUF; | |
1505 | break; | |
1506 | case 'v': | |
1507 | ctx->vflag = true; | |
1508 | break; | |
1509 | default: | |
1510 | g_free(ctx); | |
1511 | qemuio_command_usage(&aio_read_cmd); | |
1512 | return -EINVAL; | |
1513 | } | |
1514 | } | |
1515 | ||
1516 | if (optind > argc - 2) { | |
1517 | g_free(ctx); | |
1518 | qemuio_command_usage(&aio_read_cmd); | |
1519 | return -EINVAL; | |
1520 | } | |
1521 | ||
1522 | ctx->offset = cvtnum(argv[optind]); | |
1523 | if (ctx->offset < 0) { | |
1524 | int ret = ctx->offset; | |
1525 | print_cvtnum_err(ret, argv[optind]); | |
1526 | g_free(ctx); | |
1527 | return ret; | |
1528 | } | |
1529 | optind++; | |
1530 | ||
1531 | nr_iov = argc - optind; | |
1532 | ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, 0xab, | |
1533 | ctx->flags & BDRV_REQ_REGISTERED_BUF); | |
1534 | if (ctx->buf == NULL) { | |
1535 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); | |
1536 | g_free(ctx); | |
1537 | return -EINVAL; | |
1538 | } | |
1539 | ||
1540 | clock_gettime(CLOCK_MONOTONIC, &ctx->t1); | |
1541 | block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, | |
1542 | BLOCK_ACCT_READ); | |
1543 | blk_aio_preadv(blk, ctx->offset, &ctx->qiov, ctx->flags, aio_read_done, | |
1544 | ctx); | |
1545 | return 0; | |
1546 | } | |
1547 | ||
1548 | static void aio_write_help(void) | |
1549 | { | |
1550 | printf( | |
1551 | "\n" | |
1552 | " asynchronously writes a range of bytes from the given offset source\n" | |
1553 | " from multiple buffers\n" | |
1554 | "\n" | |
1555 | " Example:\n" | |
1556 | " 'aio_write 512 1k 1k' - writes 2 kilobytes at 512 bytes into the open file\n" | |
1557 | "\n" | |
1558 | " Writes into a segment of the currently open file, using a buffer\n" | |
1559 | " filled with a set pattern (0xcdcdcdcd).\n" | |
1560 | " The write is performed asynchronously and the aio_flush command must be\n" | |
1561 | " used to ensure all outstanding aio requests have been completed.\n" | |
1562 | " Note that due to its asynchronous nature, this command will be\n" | |
1563 | " considered successful once the request is submitted, independently\n" | |
1564 | " of potential I/O errors or pattern mismatches.\n" | |
1565 | " -C, -- report statistics in a machine parsable format\n" | |
1566 | " -f, -- use Force Unit Access semantics\n" | |
1567 | " -i, -- treat request as invalid, for exercising stats\n" | |
1568 | " -P, -- use different pattern to fill file\n" | |
1569 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1570 | " -r, -- register I/O buffer\n" | |
1571 | " -u, -- with -z, allow unmapping\n" | |
1572 | " -z, -- write zeroes using blk_aio_pwrite_zeroes\n" | |
1573 | "\n"); | |
1574 | } | |
1575 | ||
1576 | static int aio_write_f(BlockBackend *blk, int argc, char **argv); | |
1577 | ||
1578 | static const cmdinfo_t aio_write_cmd = { | |
1579 | .name = "aio_write", | |
1580 | .cfunc = aio_write_f, | |
1581 | .perm = BLK_PERM_WRITE, | |
1582 | .argmin = 2, | |
1583 | .argmax = -1, | |
1584 | .args = "[-Cfiqruz] [-P pattern] off len [len..]", | |
1585 | .oneline = "asynchronously writes a number of bytes", | |
1586 | .help = aio_write_help, | |
1587 | }; | |
1588 | ||
1589 | static int aio_write_f(BlockBackend *blk, int argc, char **argv) | |
1590 | { | |
1591 | int nr_iov, c; | |
1592 | int pattern = 0xcd; | |
1593 | struct aio_ctx *ctx = g_new0(struct aio_ctx, 1); | |
1594 | ||
1595 | ctx->blk = blk; | |
1596 | while ((c = getopt(argc, argv, "CfiP:qruz")) != -1) { | |
1597 | switch (c) { | |
1598 | case 'C': | |
1599 | ctx->Cflag = true; | |
1600 | break; | |
1601 | case 'f': | |
1602 | ctx->flags |= BDRV_REQ_FUA; | |
1603 | break; | |
1604 | case 'q': | |
1605 | ctx->qflag = true; | |
1606 | break; | |
1607 | case 'r': | |
1608 | ctx->flags |= BDRV_REQ_REGISTERED_BUF; | |
1609 | break; | |
1610 | case 'u': | |
1611 | ctx->flags |= BDRV_REQ_MAY_UNMAP; | |
1612 | break; | |
1613 | case 'P': | |
1614 | pattern = parse_pattern(optarg); | |
1615 | if (pattern < 0) { | |
1616 | g_free(ctx); | |
1617 | return -EINVAL; | |
1618 | } | |
1619 | break; | |
1620 | case 'i': | |
1621 | printf("injecting invalid write request\n"); | |
1622 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); | |
1623 | g_free(ctx); | |
1624 | return 0; | |
1625 | case 'z': | |
1626 | ctx->zflag = true; | |
1627 | break; | |
1628 | default: | |
1629 | g_free(ctx); | |
1630 | qemuio_command_usage(&aio_write_cmd); | |
1631 | return -EINVAL; | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | if (optind > argc - 2) { | |
1636 | g_free(ctx); | |
1637 | qemuio_command_usage(&aio_write_cmd); | |
1638 | return -EINVAL; | |
1639 | } | |
1640 | ||
1641 | if (ctx->zflag && optind != argc - 2) { | |
1642 | printf("-z supports only a single length parameter\n"); | |
1643 | g_free(ctx); | |
1644 | return -EINVAL; | |
1645 | } | |
1646 | ||
1647 | if ((ctx->flags & BDRV_REQ_MAY_UNMAP) && !ctx->zflag) { | |
1648 | printf("-u requires -z to be specified\n"); | |
1649 | g_free(ctx); | |
1650 | return -EINVAL; | |
1651 | } | |
1652 | ||
1653 | if (ctx->zflag && ctx->Pflag) { | |
1654 | printf("-z and -P cannot be specified at the same time\n"); | |
1655 | g_free(ctx); | |
1656 | return -EINVAL; | |
1657 | } | |
1658 | ||
1659 | if (ctx->zflag && (ctx->flags & BDRV_REQ_REGISTERED_BUF)) { | |
1660 | printf("cannot combine zero write with registered I/O buffer\n"); | |
1661 | g_free(ctx); | |
1662 | return -EINVAL; | |
1663 | } | |
1664 | ||
1665 | ctx->offset = cvtnum(argv[optind]); | |
1666 | if (ctx->offset < 0) { | |
1667 | int ret = ctx->offset; | |
1668 | print_cvtnum_err(ret, argv[optind]); | |
1669 | g_free(ctx); | |
1670 | return ret; | |
1671 | } | |
1672 | optind++; | |
1673 | ||
1674 | if (ctx->zflag) { | |
1675 | int64_t count = cvtnum(argv[optind]); | |
1676 | if (count < 0) { | |
1677 | print_cvtnum_err(count, argv[optind]); | |
1678 | g_free(ctx); | |
1679 | return count; | |
1680 | } | |
1681 | ||
1682 | ctx->qiov.size = count; | |
1683 | blk_aio_pwrite_zeroes(blk, ctx->offset, count, ctx->flags, | |
1684 | aio_write_done, ctx); | |
1685 | } else { | |
1686 | nr_iov = argc - optind; | |
1687 | ctx->buf = create_iovec(blk, &ctx->qiov, &argv[optind], nr_iov, | |
1688 | pattern, ctx->flags & BDRV_REQ_REGISTERED_BUF); | |
1689 | if (ctx->buf == NULL) { | |
1690 | block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); | |
1691 | g_free(ctx); | |
1692 | return -EINVAL; | |
1693 | } | |
1694 | ||
1695 | clock_gettime(CLOCK_MONOTONIC, &ctx->t1); | |
1696 | block_acct_start(blk_get_stats(blk), &ctx->acct, ctx->qiov.size, | |
1697 | BLOCK_ACCT_WRITE); | |
1698 | ||
1699 | blk_aio_pwritev(blk, ctx->offset, &ctx->qiov, ctx->flags, | |
1700 | aio_write_done, ctx); | |
1701 | } | |
1702 | ||
1703 | return 0; | |
1704 | } | |
1705 | ||
1706 | static int aio_flush_f(BlockBackend *blk, int argc, char **argv) | |
1707 | { | |
1708 | BlockAcctCookie cookie; | |
1709 | block_acct_start(blk_get_stats(blk), &cookie, 0, BLOCK_ACCT_FLUSH); | |
1710 | blk_drain_all(); | |
1711 | block_acct_done(blk_get_stats(blk), &cookie); | |
1712 | return 0; | |
1713 | } | |
1714 | ||
1715 | static const cmdinfo_t aio_flush_cmd = { | |
1716 | .name = "aio_flush", | |
1717 | .cfunc = aio_flush_f, | |
1718 | .oneline = "completes all outstanding aio requests" | |
1719 | }; | |
1720 | ||
1721 | static int flush_f(BlockBackend *blk, int argc, char **argv) | |
1722 | { | |
1723 | return blk_flush(blk); | |
1724 | } | |
1725 | ||
1726 | static const cmdinfo_t flush_cmd = { | |
1727 | .name = "flush", | |
1728 | .altname = "f", | |
1729 | .cfunc = flush_f, | |
1730 | .oneline = "flush all in-core file state to disk", | |
1731 | }; | |
1732 | ||
1733 | static int truncate_f(BlockBackend *blk, int argc, char **argv); | |
1734 | static const cmdinfo_t truncate_cmd = { | |
1735 | .name = "truncate", | |
1736 | .altname = "t", | |
1737 | .cfunc = truncate_f, | |
1738 | .perm = BLK_PERM_WRITE | BLK_PERM_RESIZE, | |
1739 | .argmin = 1, | |
1740 | .argmax = 3, | |
1741 | .args = "[-m prealloc_mode] off", | |
1742 | .oneline = "truncates the current file at the given offset", | |
1743 | }; | |
1744 | ||
1745 | static int truncate_f(BlockBackend *blk, int argc, char **argv) | |
1746 | { | |
1747 | Error *local_err = NULL; | |
1748 | int64_t offset; | |
1749 | int c, ret; | |
1750 | PreallocMode prealloc = PREALLOC_MODE_OFF; | |
1751 | ||
1752 | while ((c = getopt(argc, argv, "m:")) != -1) { | |
1753 | switch (c) { | |
1754 | case 'm': | |
1755 | prealloc = qapi_enum_parse(&PreallocMode_lookup, optarg, | |
1756 | PREALLOC_MODE__MAX, NULL); | |
1757 | if (prealloc == PREALLOC_MODE__MAX) { | |
1758 | error_report("Invalid preallocation mode '%s'", optarg); | |
1759 | return -EINVAL; | |
1760 | } | |
1761 | break; | |
1762 | default: | |
1763 | qemuio_command_usage(&truncate_cmd); | |
1764 | return -EINVAL; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | offset = cvtnum(argv[optind]); | |
1769 | if (offset < 0) { | |
1770 | print_cvtnum_err(offset, argv[1]); | |
1771 | return offset; | |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | * qemu-io is a debugging tool, so let us be strict here and pass | |
1776 | * exact=true. It is better to err on the "emit more errors" side | |
1777 | * than to be overly permissive. | |
1778 | */ | |
1779 | ret = blk_truncate(blk, offset, false, prealloc, 0, &local_err); | |
1780 | if (ret < 0) { | |
1781 | error_report_err(local_err); | |
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | return 0; | |
1786 | } | |
1787 | ||
1788 | static int length_f(BlockBackend *blk, int argc, char **argv) | |
1789 | { | |
1790 | int64_t size; | |
1791 | char s1[64]; | |
1792 | ||
1793 | size = blk_getlength(blk); | |
1794 | if (size < 0) { | |
1795 | printf("getlength: %s\n", strerror(-size)); | |
1796 | return size; | |
1797 | } | |
1798 | ||
1799 | cvtstr(size, s1, sizeof(s1)); | |
1800 | printf("%s\n", s1); | |
1801 | return 0; | |
1802 | } | |
1803 | ||
1804 | ||
1805 | static const cmdinfo_t length_cmd = { | |
1806 | .name = "length", | |
1807 | .altname = "l", | |
1808 | .cfunc = length_f, | |
1809 | .oneline = "gets the length of the current file", | |
1810 | }; | |
1811 | ||
1812 | ||
1813 | static int info_f(BlockBackend *blk, int argc, char **argv) | |
1814 | { | |
1815 | BlockDriverState *bs = blk_bs(blk); | |
1816 | BlockDriverInfo bdi; | |
1817 | ImageInfoSpecific *spec_info; | |
1818 | Error *local_err = NULL; | |
1819 | char s1[64], s2[64]; | |
1820 | int ret; | |
1821 | ||
1822 | if (bs->drv && bs->drv->format_name) { | |
1823 | printf("format name: %s\n", bs->drv->format_name); | |
1824 | } | |
1825 | if (bs->drv && bs->drv->protocol_name) { | |
1826 | printf("format name: %s\n", bs->drv->protocol_name); | |
1827 | } | |
1828 | ||
1829 | ret = bdrv_get_info(bs, &bdi); | |
1830 | if (ret) { | |
1831 | return ret; | |
1832 | } | |
1833 | ||
1834 | cvtstr(bdi.cluster_size, s1, sizeof(s1)); | |
1835 | cvtstr(bdi.vm_state_offset, s2, sizeof(s2)); | |
1836 | ||
1837 | printf("cluster size: %s\n", s1); | |
1838 | printf("vm state offset: %s\n", s2); | |
1839 | ||
1840 | spec_info = bdrv_get_specific_info(bs, &local_err); | |
1841 | if (local_err) { | |
1842 | error_report_err(local_err); | |
1843 | return -EIO; | |
1844 | } | |
1845 | if (spec_info) { | |
1846 | bdrv_image_info_specific_dump(spec_info, | |
1847 | "Format specific information:\n", | |
1848 | 0); | |
1849 | qapi_free_ImageInfoSpecific(spec_info); | |
1850 | } | |
1851 | ||
1852 | return 0; | |
1853 | } | |
1854 | ||
1855 | ||
1856 | ||
1857 | static const cmdinfo_t info_cmd = { | |
1858 | .name = "info", | |
1859 | .altname = "i", | |
1860 | .cfunc = info_f, | |
1861 | .oneline = "prints information about the current file", | |
1862 | }; | |
1863 | ||
1864 | static void discard_help(void) | |
1865 | { | |
1866 | printf( | |
1867 | "\n" | |
1868 | " discards a range of bytes from the given offset\n" | |
1869 | "\n" | |
1870 | " Example:\n" | |
1871 | " 'discard 512 1k' - discards 1 kilobyte from 512 bytes into the file\n" | |
1872 | "\n" | |
1873 | " Discards a segment of the currently open file.\n" | |
1874 | " -C, -- report statistics in a machine parsable format\n" | |
1875 | " -q, -- quiet mode, do not show I/O statistics\n" | |
1876 | "\n"); | |
1877 | } | |
1878 | ||
1879 | static int discard_f(BlockBackend *blk, int argc, char **argv); | |
1880 | ||
1881 | static const cmdinfo_t discard_cmd = { | |
1882 | .name = "discard", | |
1883 | .altname = "d", | |
1884 | .cfunc = discard_f, | |
1885 | .perm = BLK_PERM_WRITE, | |
1886 | .argmin = 2, | |
1887 | .argmax = -1, | |
1888 | .args = "[-Cq] off len", | |
1889 | .oneline = "discards a number of bytes at a specified offset", | |
1890 | .help = discard_help, | |
1891 | }; | |
1892 | ||
1893 | static int discard_f(BlockBackend *blk, int argc, char **argv) | |
1894 | { | |
1895 | struct timespec t1, t2; | |
1896 | bool Cflag = false, qflag = false; | |
1897 | int c, ret; | |
1898 | int64_t offset, bytes; | |
1899 | ||
1900 | while ((c = getopt(argc, argv, "Cq")) != -1) { | |
1901 | switch (c) { | |
1902 | case 'C': | |
1903 | Cflag = true; | |
1904 | break; | |
1905 | case 'q': | |
1906 | qflag = true; | |
1907 | break; | |
1908 | default: | |
1909 | qemuio_command_usage(&discard_cmd); | |
1910 | return -EINVAL; | |
1911 | } | |
1912 | } | |
1913 | ||
1914 | if (optind != argc - 2) { | |
1915 | qemuio_command_usage(&discard_cmd); | |
1916 | return -EINVAL; | |
1917 | } | |
1918 | ||
1919 | offset = cvtnum(argv[optind]); | |
1920 | if (offset < 0) { | |
1921 | print_cvtnum_err(offset, argv[optind]); | |
1922 | return offset; | |
1923 | } | |
1924 | ||
1925 | optind++; | |
1926 | bytes = cvtnum(argv[optind]); | |
1927 | if (bytes < 0) { | |
1928 | print_cvtnum_err(bytes, argv[optind]); | |
1929 | return bytes; | |
1930 | } else if (bytes > BDRV_REQUEST_MAX_BYTES) { | |
1931 | printf("length cannot exceed %"PRIu64", given %s\n", | |
1932 | (uint64_t)BDRV_REQUEST_MAX_BYTES, argv[optind]); | |
1933 | return -EINVAL; | |
1934 | } | |
1935 | ||
1936 | clock_gettime(CLOCK_MONOTONIC, &t1); | |
1937 | ret = blk_pdiscard(blk, offset, bytes); | |
1938 | clock_gettime(CLOCK_MONOTONIC, &t2); | |
1939 | ||
1940 | if (ret < 0) { | |
1941 | printf("discard failed: %s\n", strerror(-ret)); | |
1942 | return ret; | |
1943 | } | |
1944 | ||
1945 | /* Finally, report back -- -C gives a parsable format */ | |
1946 | if (!qflag) { | |
1947 | t2 = tsub(t2, t1); | |
1948 | print_report("discard", &t2, offset, bytes, bytes, 1, Cflag); | |
1949 | } | |
1950 | ||
1951 | return 0; | |
1952 | } | |
1953 | ||
1954 | static int alloc_f(BlockBackend *blk, int argc, char **argv) | |
1955 | { | |
1956 | BlockDriverState *bs = blk_bs(blk); | |
1957 | int64_t offset, start, remaining, count; | |
1958 | char s1[64]; | |
1959 | int ret; | |
1960 | int64_t num, sum_alloc; | |
1961 | ||
1962 | start = offset = cvtnum(argv[1]); | |
1963 | if (offset < 0) { | |
1964 | print_cvtnum_err(offset, argv[1]); | |
1965 | return offset; | |
1966 | } | |
1967 | ||
1968 | if (argc == 3) { | |
1969 | count = cvtnum(argv[2]); | |
1970 | if (count < 0) { | |
1971 | print_cvtnum_err(count, argv[2]); | |
1972 | return count; | |
1973 | } | |
1974 | } else { | |
1975 | count = BDRV_SECTOR_SIZE; | |
1976 | } | |
1977 | ||
1978 | remaining = count; | |
1979 | sum_alloc = 0; | |
1980 | while (remaining) { | |
1981 | ret = bdrv_is_allocated(bs, offset, remaining, &num); | |
1982 | if (ret < 0) { | |
1983 | printf("is_allocated failed: %s\n", strerror(-ret)); | |
1984 | return ret; | |
1985 | } | |
1986 | offset += num; | |
1987 | remaining -= num; | |
1988 | if (ret) { | |
1989 | sum_alloc += num; | |
1990 | } | |
1991 | if (num == 0) { | |
1992 | count -= remaining; | |
1993 | remaining = 0; | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | cvtstr(start, s1, sizeof(s1)); | |
1998 | ||
1999 | printf("%"PRId64"/%"PRId64" bytes allocated at offset %s\n", | |
2000 | sum_alloc, count, s1); | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | static const cmdinfo_t alloc_cmd = { | |
2005 | .name = "alloc", | |
2006 | .altname = "a", | |
2007 | .argmin = 1, | |
2008 | .argmax = 2, | |
2009 | .cfunc = alloc_f, | |
2010 | .args = "offset [count]", | |
2011 | .oneline = "checks if offset is allocated in the file", | |
2012 | }; | |
2013 | ||
2014 | ||
2015 | static int map_is_allocated(BlockDriverState *bs, int64_t offset, | |
2016 | int64_t bytes, int64_t *pnum) | |
2017 | { | |
2018 | int64_t num; | |
2019 | int ret, firstret; | |
2020 | ||
2021 | ret = bdrv_is_allocated(bs, offset, bytes, &num); | |
2022 | if (ret < 0) { | |
2023 | return ret; | |
2024 | } | |
2025 | ||
2026 | firstret = ret; | |
2027 | *pnum = num; | |
2028 | ||
2029 | while (bytes > 0 && ret == firstret) { | |
2030 | offset += num; | |
2031 | bytes -= num; | |
2032 | ||
2033 | ret = bdrv_is_allocated(bs, offset, bytes, &num); | |
2034 | if (ret == firstret && num) { | |
2035 | *pnum += num; | |
2036 | } else { | |
2037 | break; | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | return firstret; | |
2042 | } | |
2043 | ||
2044 | static int map_f(BlockBackend *blk, int argc, char **argv) | |
2045 | { | |
2046 | int64_t offset, bytes; | |
2047 | char s1[64], s2[64]; | |
2048 | int64_t num; | |
2049 | int ret; | |
2050 | const char *retstr; | |
2051 | ||
2052 | offset = 0; | |
2053 | bytes = blk_getlength(blk); | |
2054 | if (bytes < 0) { | |
2055 | error_report("Failed to query image length: %s", strerror(-bytes)); | |
2056 | return bytes; | |
2057 | } | |
2058 | ||
2059 | while (bytes) { | |
2060 | ret = map_is_allocated(blk_bs(blk), offset, bytes, &num); | |
2061 | if (ret < 0) { | |
2062 | error_report("Failed to get allocation status: %s", strerror(-ret)); | |
2063 | return ret; | |
2064 | } else if (!num) { | |
2065 | error_report("Unexpected end of image"); | |
2066 | return -EIO; | |
2067 | } | |
2068 | ||
2069 | retstr = ret ? " allocated" : "not allocated"; | |
2070 | cvtstr(num, s1, sizeof(s1)); | |
2071 | cvtstr(offset, s2, sizeof(s2)); | |
2072 | printf("%s (0x%" PRIx64 ") bytes %s at offset %s (0x%" PRIx64 ")\n", | |
2073 | s1, num, retstr, s2, offset); | |
2074 | ||
2075 | offset += num; | |
2076 | bytes -= num; | |
2077 | } | |
2078 | ||
2079 | return 0; | |
2080 | } | |
2081 | ||
2082 | static const cmdinfo_t map_cmd = { | |
2083 | .name = "map", | |
2084 | .argmin = 0, | |
2085 | .argmax = 0, | |
2086 | .cfunc = map_f, | |
2087 | .args = "", | |
2088 | .oneline = "prints the allocated areas of a file", | |
2089 | }; | |
2090 | ||
2091 | static void reopen_help(void) | |
2092 | { | |
2093 | printf( | |
2094 | "\n" | |
2095 | " Changes the open options of an already opened image\n" | |
2096 | "\n" | |
2097 | " Example:\n" | |
2098 | " 'reopen -o lazy-refcounts=on' - activates lazy refcount writeback on a qcow2 image\n" | |
2099 | "\n" | |
2100 | " -r, -- Reopen the image read-only\n" | |
2101 | " -w, -- Reopen the image read-write\n" | |
2102 | " -c, -- Change the cache mode to the given value\n" | |
2103 | " -o, -- Changes block driver options (cf. 'open' command)\n" | |
2104 | "\n"); | |
2105 | } | |
2106 | ||
2107 | static int reopen_f(BlockBackend *blk, int argc, char **argv); | |
2108 | ||
2109 | static QemuOptsList reopen_opts = { | |
2110 | .name = "reopen", | |
2111 | .merge_lists = true, | |
2112 | .head = QTAILQ_HEAD_INITIALIZER(reopen_opts.head), | |
2113 | .desc = { | |
2114 | /* no elements => accept any params */ | |
2115 | { /* end of list */ } | |
2116 | }, | |
2117 | }; | |
2118 | ||
2119 | static const cmdinfo_t reopen_cmd = { | |
2120 | .name = "reopen", | |
2121 | .argmin = 0, | |
2122 | .argmax = -1, | |
2123 | .cfunc = reopen_f, | |
2124 | .args = "[(-r|-w)] [-c cache] [-o options]", | |
2125 | .oneline = "reopens an image with new options", | |
2126 | .help = reopen_help, | |
2127 | }; | |
2128 | ||
2129 | static int reopen_f(BlockBackend *blk, int argc, char **argv) | |
2130 | { | |
2131 | BlockDriverState *bs = blk_bs(blk); | |
2132 | QemuOpts *qopts; | |
2133 | QDict *opts; | |
2134 | int c; | |
2135 | int flags = bs->open_flags; | |
2136 | bool writethrough = !blk_enable_write_cache(blk); | |
2137 | bool has_rw_option = false; | |
2138 | bool has_cache_option = false; | |
2139 | Error *local_err = NULL; | |
2140 | ||
2141 | while ((c = getopt(argc, argv, "c:o:rw")) != -1) { | |
2142 | switch (c) { | |
2143 | case 'c': | |
2144 | if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) { | |
2145 | error_report("Invalid cache option: %s", optarg); | |
2146 | return -EINVAL; | |
2147 | } | |
2148 | has_cache_option = true; | |
2149 | break; | |
2150 | case 'o': | |
2151 | if (!qemu_opts_parse_noisily(&reopen_opts, optarg, 0)) { | |
2152 | qemu_opts_reset(&reopen_opts); | |
2153 | return -EINVAL; | |
2154 | } | |
2155 | break; | |
2156 | case 'r': | |
2157 | if (has_rw_option) { | |
2158 | error_report("Only one -r/-w option may be given"); | |
2159 | return -EINVAL; | |
2160 | } | |
2161 | flags &= ~BDRV_O_RDWR; | |
2162 | has_rw_option = true; | |
2163 | break; | |
2164 | case 'w': | |
2165 | if (has_rw_option) { | |
2166 | error_report("Only one -r/-w option may be given"); | |
2167 | return -EINVAL; | |
2168 | } | |
2169 | flags |= BDRV_O_RDWR; | |
2170 | has_rw_option = true; | |
2171 | break; | |
2172 | default: | |
2173 | qemu_opts_reset(&reopen_opts); | |
2174 | qemuio_command_usage(&reopen_cmd); | |
2175 | return -EINVAL; | |
2176 | } | |
2177 | } | |
2178 | ||
2179 | if (optind != argc) { | |
2180 | qemu_opts_reset(&reopen_opts); | |
2181 | qemuio_command_usage(&reopen_cmd); | |
2182 | return -EINVAL; | |
2183 | } | |
2184 | ||
2185 | if (!writethrough != blk_enable_write_cache(blk) && | |
2186 | blk_get_attached_dev(blk)) | |
2187 | { | |
2188 | error_report("Cannot change cache.writeback: Device attached"); | |
2189 | qemu_opts_reset(&reopen_opts); | |
2190 | return -EBUSY; | |
2191 | } | |
2192 | ||
2193 | if (!(flags & BDRV_O_RDWR)) { | |
2194 | uint64_t orig_perm, orig_shared_perm; | |
2195 | ||
2196 | bdrv_drain(bs); | |
2197 | ||
2198 | blk_get_perm(blk, &orig_perm, &orig_shared_perm); | |
2199 | blk_set_perm(blk, | |
2200 | orig_perm & ~(BLK_PERM_WRITE | BLK_PERM_WRITE_UNCHANGED), | |
2201 | orig_shared_perm, | |
2202 | &error_abort); | |
2203 | } | |
2204 | ||
2205 | qopts = qemu_opts_find(&reopen_opts, NULL); | |
2206 | opts = qopts ? qemu_opts_to_qdict(qopts, NULL) : qdict_new(); | |
2207 | qemu_opts_reset(&reopen_opts); | |
2208 | ||
2209 | if (qdict_haskey(opts, BDRV_OPT_READ_ONLY)) { | |
2210 | if (has_rw_option) { | |
2211 | error_report("Cannot set both -r/-w and '" BDRV_OPT_READ_ONLY "'"); | |
2212 | qobject_unref(opts); | |
2213 | return -EINVAL; | |
2214 | } | |
2215 | } else { | |
2216 | qdict_put_bool(opts, BDRV_OPT_READ_ONLY, !(flags & BDRV_O_RDWR)); | |
2217 | } | |
2218 | ||
2219 | if (qdict_haskey(opts, BDRV_OPT_CACHE_DIRECT) || | |
2220 | qdict_haskey(opts, BDRV_OPT_CACHE_NO_FLUSH)) { | |
2221 | if (has_cache_option) { | |
2222 | error_report("Cannot set both -c and the cache options"); | |
2223 | qobject_unref(opts); | |
2224 | return -EINVAL; | |
2225 | } | |
2226 | } else { | |
2227 | qdict_put_bool(opts, BDRV_OPT_CACHE_DIRECT, flags & BDRV_O_NOCACHE); | |
2228 | qdict_put_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, flags & BDRV_O_NO_FLUSH); | |
2229 | } | |
2230 | ||
2231 | bdrv_reopen(bs, opts, true, &local_err); | |
2232 | ||
2233 | if (local_err) { | |
2234 | error_report_err(local_err); | |
2235 | return -EINVAL; | |
2236 | } | |
2237 | ||
2238 | blk_set_enable_write_cache(blk, !writethrough); | |
2239 | return 0; | |
2240 | } | |
2241 | ||
2242 | static int break_f(BlockBackend *blk, int argc, char **argv) | |
2243 | { | |
2244 | int ret; | |
2245 | ||
2246 | ret = bdrv_debug_breakpoint(blk_bs(blk), argv[1], argv[2]); | |
2247 | if (ret < 0) { | |
2248 | printf("Could not set breakpoint: %s\n", strerror(-ret)); | |
2249 | return ret; | |
2250 | } | |
2251 | ||
2252 | return 0; | |
2253 | } | |
2254 | ||
2255 | static int remove_break_f(BlockBackend *blk, int argc, char **argv) | |
2256 | { | |
2257 | int ret; | |
2258 | ||
2259 | ret = bdrv_debug_remove_breakpoint(blk_bs(blk), argv[1]); | |
2260 | if (ret < 0) { | |
2261 | printf("Could not remove breakpoint %s: %s\n", argv[1], strerror(-ret)); | |
2262 | return ret; | |
2263 | } | |
2264 | ||
2265 | return 0; | |
2266 | } | |
2267 | ||
2268 | static const cmdinfo_t break_cmd = { | |
2269 | .name = "break", | |
2270 | .argmin = 2, | |
2271 | .argmax = 2, | |
2272 | .cfunc = break_f, | |
2273 | .args = "event tag", | |
2274 | .oneline = "sets a breakpoint on event and tags the stopped " | |
2275 | "request as tag", | |
2276 | }; | |
2277 | ||
2278 | static const cmdinfo_t remove_break_cmd = { | |
2279 | .name = "remove_break", | |
2280 | .argmin = 1, | |
2281 | .argmax = 1, | |
2282 | .cfunc = remove_break_f, | |
2283 | .args = "tag", | |
2284 | .oneline = "remove a breakpoint by tag", | |
2285 | }; | |
2286 | ||
2287 | static int resume_f(BlockBackend *blk, int argc, char **argv) | |
2288 | { | |
2289 | int ret; | |
2290 | ||
2291 | ret = bdrv_debug_resume(blk_bs(blk), argv[1]); | |
2292 | if (ret < 0) { | |
2293 | printf("Could not resume request: %s\n", strerror(-ret)); | |
2294 | return ret; | |
2295 | } | |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | static const cmdinfo_t resume_cmd = { | |
2301 | .name = "resume", | |
2302 | .argmin = 1, | |
2303 | .argmax = 1, | |
2304 | .cfunc = resume_f, | |
2305 | .args = "tag", | |
2306 | .oneline = "resumes the request tagged as tag", | |
2307 | }; | |
2308 | ||
2309 | static int wait_break_f(BlockBackend *blk, int argc, char **argv) | |
2310 | { | |
2311 | while (!bdrv_debug_is_suspended(blk_bs(blk), argv[1])) { | |
2312 | aio_poll(blk_get_aio_context(blk), true); | |
2313 | } | |
2314 | return 0; | |
2315 | } | |
2316 | ||
2317 | static const cmdinfo_t wait_break_cmd = { | |
2318 | .name = "wait_break", | |
2319 | .argmin = 1, | |
2320 | .argmax = 1, | |
2321 | .cfunc = wait_break_f, | |
2322 | .args = "tag", | |
2323 | .oneline = "waits for the suspension of a request", | |
2324 | }; | |
2325 | ||
2326 | static int abort_f(BlockBackend *blk, int argc, char **argv) | |
2327 | { | |
2328 | abort(); | |
2329 | } | |
2330 | ||
2331 | static const cmdinfo_t abort_cmd = { | |
2332 | .name = "abort", | |
2333 | .cfunc = abort_f, | |
2334 | .flags = CMD_NOFILE_OK, | |
2335 | .oneline = "simulate a program crash using abort(3)", | |
2336 | }; | |
2337 | ||
2338 | static void sigraise_help(void) | |
2339 | { | |
2340 | printf( | |
2341 | "\n" | |
2342 | " raises the given signal\n" | |
2343 | "\n" | |
2344 | " Example:\n" | |
2345 | " 'sigraise %i' - raises SIGTERM\n" | |
2346 | "\n" | |
2347 | " Invokes raise(signal), where \"signal\" is the mandatory integer argument\n" | |
2348 | " given to sigraise.\n" | |
2349 | "\n", SIGTERM); | |
2350 | } | |
2351 | ||
2352 | static int sigraise_f(BlockBackend *blk, int argc, char **argv); | |
2353 | ||
2354 | static const cmdinfo_t sigraise_cmd = { | |
2355 | .name = "sigraise", | |
2356 | .cfunc = sigraise_f, | |
2357 | .argmin = 1, | |
2358 | .argmax = 1, | |
2359 | .flags = CMD_NOFILE_OK, | |
2360 | .args = "signal", | |
2361 | .oneline = "raises a signal", | |
2362 | .help = sigraise_help, | |
2363 | }; | |
2364 | ||
2365 | static int sigraise_f(BlockBackend *blk, int argc, char **argv) | |
2366 | { | |
2367 | int64_t sig = cvtnum(argv[1]); | |
2368 | if (sig < 0) { | |
2369 | print_cvtnum_err(sig, argv[1]); | |
2370 | return sig; | |
2371 | } else if (sig > NSIG) { | |
2372 | printf("signal argument '%s' is too large to be a valid signal\n", | |
2373 | argv[1]); | |
2374 | return -EINVAL; | |
2375 | } | |
2376 | ||
2377 | /* Using raise() to kill this process does not necessarily flush all open | |
2378 | * streams. At least stdout and stderr (although the latter should be | |
2379 | * non-buffered anyway) should be flushed, though. */ | |
2380 | fflush(stdout); | |
2381 | fflush(stderr); | |
2382 | ||
2383 | raise(sig); | |
2384 | ||
2385 | return 0; | |
2386 | } | |
2387 | ||
2388 | static void sleep_cb(void *opaque) | |
2389 | { | |
2390 | bool *expired = opaque; | |
2391 | *expired = true; | |
2392 | } | |
2393 | ||
2394 | static int sleep_f(BlockBackend *blk, int argc, char **argv) | |
2395 | { | |
2396 | char *endptr; | |
2397 | long ms; | |
2398 | struct QEMUTimer *timer; | |
2399 | bool expired = false; | |
2400 | ||
2401 | ms = strtol(argv[1], &endptr, 0); | |
2402 | if (ms < 0 || *endptr != '\0') { | |
2403 | printf("%s is not a valid number\n", argv[1]); | |
2404 | return -EINVAL; | |
2405 | } | |
2406 | ||
2407 | timer = timer_new_ns(QEMU_CLOCK_HOST, sleep_cb, &expired); | |
2408 | timer_mod(timer, qemu_clock_get_ns(QEMU_CLOCK_HOST) + SCALE_MS * ms); | |
2409 | ||
2410 | while (!expired) { | |
2411 | main_loop_wait(false); | |
2412 | } | |
2413 | ||
2414 | timer_free(timer); | |
2415 | return 0; | |
2416 | } | |
2417 | ||
2418 | static const cmdinfo_t sleep_cmd = { | |
2419 | .name = "sleep", | |
2420 | .argmin = 1, | |
2421 | .argmax = 1, | |
2422 | .cfunc = sleep_f, | |
2423 | .flags = CMD_NOFILE_OK, | |
2424 | .oneline = "waits for the given value in milliseconds", | |
2425 | }; | |
2426 | ||
2427 | static void help_oneline(const char *cmd, const cmdinfo_t *ct) | |
2428 | { | |
2429 | printf("%s ", cmd); | |
2430 | ||
2431 | if (ct->args) { | |
2432 | printf("%s ", ct->args); | |
2433 | } | |
2434 | printf("-- %s\n", ct->oneline); | |
2435 | } | |
2436 | ||
2437 | static void help_onecmd(const char *cmd, const cmdinfo_t *ct) | |
2438 | { | |
2439 | help_oneline(cmd, ct); | |
2440 | if (ct->help) { | |
2441 | ct->help(); | |
2442 | } | |
2443 | } | |
2444 | ||
2445 | static void help_all(void) | |
2446 | { | |
2447 | const cmdinfo_t *ct; | |
2448 | ||
2449 | for (ct = cmdtab; ct < &cmdtab[ncmds]; ct++) { | |
2450 | help_oneline(ct->name, ct); | |
2451 | } | |
2452 | printf("\nUse 'help commandname' for extended help.\n"); | |
2453 | } | |
2454 | ||
2455 | static int help_f(BlockBackend *blk, int argc, char **argv) | |
2456 | { | |
2457 | const cmdinfo_t *ct; | |
2458 | ||
2459 | if (argc < 2) { | |
2460 | help_all(); | |
2461 | return 0; | |
2462 | } | |
2463 | ||
2464 | ct = find_command(argv[1]); | |
2465 | if (ct == NULL) { | |
2466 | printf("command %s not found\n", argv[1]); | |
2467 | return -EINVAL; | |
2468 | } | |
2469 | ||
2470 | help_onecmd(argv[1], ct); | |
2471 | return 0; | |
2472 | } | |
2473 | ||
2474 | static const cmdinfo_t help_cmd = { | |
2475 | .name = "help", | |
2476 | .altname = "?", | |
2477 | .cfunc = help_f, | |
2478 | .argmin = 0, | |
2479 | .argmax = 1, | |
2480 | .flags = CMD_FLAG_GLOBAL, | |
2481 | .args = "[command]", | |
2482 | .oneline = "help for one or all commands", | |
2483 | }; | |
2484 | ||
2485 | /* | |
2486 | * Called with aio context of blk acquired. Or with qemu_get_aio_context() | |
2487 | * context acquired if blk is NULL. | |
2488 | */ | |
2489 | int qemuio_command(BlockBackend *blk, const char *cmd) | |
2490 | { | |
2491 | char *input; | |
2492 | const cmdinfo_t *ct; | |
2493 | char **v; | |
2494 | int c; | |
2495 | int ret = 0; | |
2496 | ||
2497 | input = g_strdup(cmd); | |
2498 | v = breakline(input, &c); | |
2499 | if (c) { | |
2500 | ct = find_command(v[0]); | |
2501 | if (ct) { | |
2502 | ret = command(blk, ct, c, v); | |
2503 | } else { | |
2504 | fprintf(stderr, "command \"%s\" not found\n", v[0]); | |
2505 | ret = -EINVAL; | |
2506 | } | |
2507 | } | |
2508 | g_free(input); | |
2509 | g_free(v); | |
2510 | ||
2511 | return ret; | |
2512 | } | |
2513 | ||
2514 | static void __attribute((constructor)) init_qemuio_commands(void) | |
2515 | { | |
2516 | /* initialize commands */ | |
2517 | qemuio_add_command(&help_cmd); | |
2518 | qemuio_add_command(&read_cmd); | |
2519 | qemuio_add_command(&readv_cmd); | |
2520 | qemuio_add_command(&write_cmd); | |
2521 | qemuio_add_command(&writev_cmd); | |
2522 | qemuio_add_command(&aio_read_cmd); | |
2523 | qemuio_add_command(&aio_write_cmd); | |
2524 | qemuio_add_command(&aio_flush_cmd); | |
2525 | qemuio_add_command(&flush_cmd); | |
2526 | qemuio_add_command(&truncate_cmd); | |
2527 | qemuio_add_command(&length_cmd); | |
2528 | qemuio_add_command(&info_cmd); | |
2529 | qemuio_add_command(&discard_cmd); | |
2530 | qemuio_add_command(&alloc_cmd); | |
2531 | qemuio_add_command(&map_cmd); | |
2532 | qemuio_add_command(&reopen_cmd); | |
2533 | qemuio_add_command(&break_cmd); | |
2534 | qemuio_add_command(&remove_break_cmd); | |
2535 | qemuio_add_command(&resume_cmd); | |
2536 | qemuio_add_command(&wait_break_cmd); | |
2537 | qemuio_add_command(&abort_cmd); | |
2538 | qemuio_add_command(&sleep_cmd); | |
2539 | qemuio_add_command(&sigraise_cmd); | |
2540 | } |