1 /* 2 * Block layer qmp and info dump related functions 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #include "block/qapi.h" 26 #include "block/block_int.h" 27 #include "qmp-commands.h" 28 #include "qapi-visit.h" 29 #include "qapi/qmp-output-visitor.h" 30 #include "qapi/qmp/types.h" 31 32 BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs) 33 { 34 BlockDeviceInfo *info = g_malloc0(sizeof(*info)); 35 36 info->file = g_strdup(bs->filename); 37 info->ro = bs->read_only; 38 info->drv = g_strdup(bs->drv->format_name); 39 info->encrypted = bs->encrypted; 40 info->encryption_key_missing = bdrv_key_required(bs); 41 42 if (bs->node_name[0]) { 43 info->has_node_name = true; 44 info->node_name = g_strdup(bs->node_name); 45 } 46 47 if (bs->backing_file[0]) { 48 info->has_backing_file = true; 49 info->backing_file = g_strdup(bs->backing_file); 50 } 51 52 info->backing_file_depth = bdrv_get_backing_file_depth(bs); 53 info->detect_zeroes = bs->detect_zeroes; 54 55 if (bs->io_limits_enabled) { 56 ThrottleConfig cfg; 57 throttle_get_config(&bs->throttle_state, &cfg); 58 info->bps = cfg.buckets[THROTTLE_BPS_TOTAL].avg; 59 info->bps_rd = cfg.buckets[THROTTLE_BPS_READ].avg; 60 info->bps_wr = cfg.buckets[THROTTLE_BPS_WRITE].avg; 61 62 info->iops = cfg.buckets[THROTTLE_OPS_TOTAL].avg; 63 info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg; 64 info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg; 65 66 info->has_bps_max = cfg.buckets[THROTTLE_BPS_TOTAL].max; 67 info->bps_max = cfg.buckets[THROTTLE_BPS_TOTAL].max; 68 info->has_bps_rd_max = cfg.buckets[THROTTLE_BPS_READ].max; 69 info->bps_rd_max = cfg.buckets[THROTTLE_BPS_READ].max; 70 info->has_bps_wr_max = cfg.buckets[THROTTLE_BPS_WRITE].max; 71 info->bps_wr_max = cfg.buckets[THROTTLE_BPS_WRITE].max; 72 73 info->has_iops_max = cfg.buckets[THROTTLE_OPS_TOTAL].max; 74 info->iops_max = cfg.buckets[THROTTLE_OPS_TOTAL].max; 75 info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max; 76 info->iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max; 77 info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max; 78 info->iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max; 79 80 info->has_iops_size = cfg.op_size; 81 info->iops_size = cfg.op_size; 82 } 83 84 return info; 85 } 86 87 /* 88 * Returns 0 on success, with *p_list either set to describe snapshot 89 * information, or NULL because there are no snapshots. Returns -errno on 90 * error, with *p_list untouched. 91 */ 92 int bdrv_query_snapshot_info_list(BlockDriverState *bs, 93 SnapshotInfoList **p_list, 94 Error **errp) 95 { 96 int i, sn_count; 97 QEMUSnapshotInfo *sn_tab = NULL; 98 SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL; 99 SnapshotInfo *info; 100 101 sn_count = bdrv_snapshot_list(bs, &sn_tab); 102 if (sn_count < 0) { 103 const char *dev = bdrv_get_device_name(bs); 104 switch (sn_count) { 105 case -ENOMEDIUM: 106 error_setg(errp, "Device '%s' is not inserted", dev); 107 break; 108 case -ENOTSUP: 109 error_setg(errp, 110 "Device '%s' does not support internal snapshots", 111 dev); 112 break; 113 default: 114 error_setg_errno(errp, -sn_count, 115 "Can't list snapshots of device '%s'", dev); 116 break; 117 } 118 return sn_count; 119 } 120 121 for (i = 0; i < sn_count; i++) { 122 info = g_new0(SnapshotInfo, 1); 123 info->id = g_strdup(sn_tab[i].id_str); 124 info->name = g_strdup(sn_tab[i].name); 125 info->vm_state_size = sn_tab[i].vm_state_size; 126 info->date_sec = sn_tab[i].date_sec; 127 info->date_nsec = sn_tab[i].date_nsec; 128 info->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000; 129 info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000; 130 131 info_list = g_new0(SnapshotInfoList, 1); 132 info_list->value = info; 133 134 /* XXX: waiting for the qapi to support qemu-queue.h types */ 135 if (!cur_item) { 136 head = cur_item = info_list; 137 } else { 138 cur_item->next = info_list; 139 cur_item = info_list; 140 } 141 142 } 143 144 g_free(sn_tab); 145 *p_list = head; 146 return 0; 147 } 148 149 /** 150 * bdrv_query_image_info: 151 * @bs: block device to examine 152 * @p_info: location to store image information 153 * @errp: location to store error information 154 * 155 * Store "flat" image information in @p_info. 156 * 157 * "Flat" means it does *not* query backing image information, 158 * i.e. (*pinfo)->has_backing_image will be set to false and 159 * (*pinfo)->backing_image to NULL even when the image does in fact have 160 * a backing image. 161 * 162 * @p_info will be set only on success. On error, store error in @errp. 163 */ 164 void bdrv_query_image_info(BlockDriverState *bs, 165 ImageInfo **p_info, 166 Error **errp) 167 { 168 uint64_t total_sectors; 169 const char *backing_filename; 170 char backing_filename2[1024]; 171 BlockDriverInfo bdi; 172 int ret; 173 Error *err = NULL; 174 ImageInfo *info = g_new0(ImageInfo, 1); 175 176 bdrv_get_geometry(bs, &total_sectors); 177 178 info->filename = g_strdup(bs->filename); 179 info->format = g_strdup(bdrv_get_format_name(bs)); 180 info->virtual_size = total_sectors * 512; 181 info->actual_size = bdrv_get_allocated_file_size(bs); 182 info->has_actual_size = info->actual_size >= 0; 183 if (bdrv_is_encrypted(bs)) { 184 info->encrypted = true; 185 info->has_encrypted = true; 186 } 187 if (bdrv_get_info(bs, &bdi) >= 0) { 188 if (bdi.cluster_size != 0) { 189 info->cluster_size = bdi.cluster_size; 190 info->has_cluster_size = true; 191 } 192 info->dirty_flag = bdi.is_dirty; 193 info->has_dirty_flag = true; 194 } 195 info->format_specific = bdrv_get_specific_info(bs); 196 info->has_format_specific = info->format_specific != NULL; 197 198 backing_filename = bs->backing_file; 199 if (backing_filename[0] != '\0') { 200 info->backing_filename = g_strdup(backing_filename); 201 info->has_backing_filename = true; 202 bdrv_get_full_backing_filename(bs, backing_filename2, 203 sizeof(backing_filename2)); 204 205 if (strcmp(backing_filename, backing_filename2) != 0) { 206 info->full_backing_filename = 207 g_strdup(backing_filename2); 208 info->has_full_backing_filename = true; 209 } 210 211 if (bs->backing_format[0]) { 212 info->backing_filename_format = g_strdup(bs->backing_format); 213 info->has_backing_filename_format = true; 214 } 215 } 216 217 ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err); 218 switch (ret) { 219 case 0: 220 if (info->snapshots) { 221 info->has_snapshots = true; 222 } 223 break; 224 /* recoverable error */ 225 case -ENOMEDIUM: 226 case -ENOTSUP: 227 error_free(err); 228 break; 229 default: 230 error_propagate(errp, err); 231 qapi_free_ImageInfo(info); 232 return; 233 } 234 235 *p_info = info; 236 } 237 238 /* @p_info will be set only on success. */ 239 void bdrv_query_info(BlockDriverState *bs, 240 BlockInfo **p_info, 241 Error **errp) 242 { 243 BlockInfo *info = g_malloc0(sizeof(*info)); 244 BlockDriverState *bs0; 245 ImageInfo **p_image_info; 246 Error *local_err = NULL; 247 info->device = g_strdup(bs->device_name); 248 info->type = g_strdup("unknown"); 249 info->locked = bdrv_dev_is_medium_locked(bs); 250 info->removable = bdrv_dev_has_removable_media(bs); 251 252 if (bdrv_dev_has_removable_media(bs)) { 253 info->has_tray_open = true; 254 info->tray_open = bdrv_dev_is_tray_open(bs); 255 } 256 257 if (bdrv_iostatus_is_enabled(bs)) { 258 info->has_io_status = true; 259 info->io_status = bs->iostatus; 260 } 261 262 if (!QLIST_EMPTY(&bs->dirty_bitmaps)) { 263 info->has_dirty_bitmaps = true; 264 info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs); 265 } 266 267 if (bs->drv) { 268 info->has_inserted = true; 269 info->inserted = bdrv_block_device_info(bs); 270 271 bs0 = bs; 272 p_image_info = &info->inserted->image; 273 while (1) { 274 bdrv_query_image_info(bs0, p_image_info, &local_err); 275 if (local_err) { 276 error_propagate(errp, local_err); 277 goto err; 278 } 279 if (bs0->drv && bs0->backing_hd) { 280 bs0 = bs0->backing_hd; 281 (*p_image_info)->has_backing_image = true; 282 p_image_info = &((*p_image_info)->backing_image); 283 } else { 284 break; 285 } 286 } 287 } 288 289 *p_info = info; 290 return; 291 292 err: 293 qapi_free_BlockInfo(info); 294 } 295 296 static BlockStats *bdrv_query_stats(const BlockDriverState *bs) 297 { 298 BlockStats *s; 299 300 s = g_malloc0(sizeof(*s)); 301 302 if (bs->device_name[0]) { 303 s->has_device = true; 304 s->device = g_strdup(bs->device_name); 305 } 306 307 s->stats = g_malloc0(sizeof(*s->stats)); 308 s->stats->rd_bytes = bs->nr_bytes[BDRV_ACCT_READ]; 309 s->stats->wr_bytes = bs->nr_bytes[BDRV_ACCT_WRITE]; 310 s->stats->rd_operations = bs->nr_ops[BDRV_ACCT_READ]; 311 s->stats->wr_operations = bs->nr_ops[BDRV_ACCT_WRITE]; 312 s->stats->wr_highest_offset = bs->wr_highest_sector * BDRV_SECTOR_SIZE; 313 s->stats->flush_operations = bs->nr_ops[BDRV_ACCT_FLUSH]; 314 s->stats->wr_total_time_ns = bs->total_time_ns[BDRV_ACCT_WRITE]; 315 s->stats->rd_total_time_ns = bs->total_time_ns[BDRV_ACCT_READ]; 316 s->stats->flush_total_time_ns = bs->total_time_ns[BDRV_ACCT_FLUSH]; 317 318 if (bs->file) { 319 s->has_parent = true; 320 s->parent = bdrv_query_stats(bs->file); 321 } 322 323 if (bs->backing_hd) { 324 s->has_backing = true; 325 s->backing = bdrv_query_stats(bs->backing_hd); 326 } 327 328 return s; 329 } 330 331 BlockInfoList *qmp_query_block(Error **errp) 332 { 333 BlockInfoList *head = NULL, **p_next = &head; 334 BlockDriverState *bs = NULL; 335 Error *local_err = NULL; 336 337 while ((bs = bdrv_next(bs))) { 338 BlockInfoList *info = g_malloc0(sizeof(*info)); 339 bdrv_query_info(bs, &info->value, &local_err); 340 if (local_err) { 341 error_propagate(errp, local_err); 342 goto err; 343 } 344 345 *p_next = info; 346 p_next = &info->next; 347 } 348 349 return head; 350 351 err: 352 qapi_free_BlockInfoList(head); 353 return NULL; 354 } 355 356 BlockStatsList *qmp_query_blockstats(Error **errp) 357 { 358 BlockStatsList *head = NULL, **p_next = &head; 359 BlockDriverState *bs = NULL; 360 361 while ((bs = bdrv_next(bs))) { 362 BlockStatsList *info = g_malloc0(sizeof(*info)); 363 AioContext *ctx = bdrv_get_aio_context(bs); 364 365 aio_context_acquire(ctx); 366 info->value = bdrv_query_stats(bs); 367 aio_context_release(ctx); 368 369 *p_next = info; 370 p_next = &info->next; 371 } 372 373 return head; 374 } 375 376 #define NB_SUFFIXES 4 377 378 static char *get_human_readable_size(char *buf, int buf_size, int64_t size) 379 { 380 static const char suffixes[NB_SUFFIXES] = "KMGT"; 381 int64_t base; 382 int i; 383 384 if (size <= 999) { 385 snprintf(buf, buf_size, "%" PRId64, size); 386 } else { 387 base = 1024; 388 for (i = 0; i < NB_SUFFIXES; i++) { 389 if (size < (10 * base)) { 390 snprintf(buf, buf_size, "%0.1f%c", 391 (double)size / base, 392 suffixes[i]); 393 break; 394 } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { 395 snprintf(buf, buf_size, "%" PRId64 "%c", 396 ((size + (base >> 1)) / base), 397 suffixes[i]); 398 break; 399 } 400 base = base * 1024; 401 } 402 } 403 return buf; 404 } 405 406 void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f, 407 QEMUSnapshotInfo *sn) 408 { 409 char buf1[128], date_buf[128], clock_buf[128]; 410 struct tm tm; 411 time_t ti; 412 int64_t secs; 413 414 if (!sn) { 415 func_fprintf(f, 416 "%-10s%-20s%7s%20s%15s", 417 "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); 418 } else { 419 ti = sn->date_sec; 420 localtime_r(&ti, &tm); 421 strftime(date_buf, sizeof(date_buf), 422 "%Y-%m-%d %H:%M:%S", &tm); 423 secs = sn->vm_clock_nsec / 1000000000; 424 snprintf(clock_buf, sizeof(clock_buf), 425 "%02d:%02d:%02d.%03d", 426 (int)(secs / 3600), 427 (int)((secs / 60) % 60), 428 (int)(secs % 60), 429 (int)((sn->vm_clock_nsec / 1000000) % 1000)); 430 func_fprintf(f, 431 "%-10s%-20s%7s%20s%15s", 432 sn->id_str, sn->name, 433 get_human_readable_size(buf1, sizeof(buf1), 434 sn->vm_state_size), 435 date_buf, 436 clock_buf); 437 } 438 } 439 440 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation, 441 QDict *dict); 442 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation, 443 QList *list); 444 445 static void dump_qobject(fprintf_function func_fprintf, void *f, 446 int comp_indent, QObject *obj) 447 { 448 switch (qobject_type(obj)) { 449 case QTYPE_QINT: { 450 QInt *value = qobject_to_qint(obj); 451 func_fprintf(f, "%" PRId64, qint_get_int(value)); 452 break; 453 } 454 case QTYPE_QSTRING: { 455 QString *value = qobject_to_qstring(obj); 456 func_fprintf(f, "%s", qstring_get_str(value)); 457 break; 458 } 459 case QTYPE_QDICT: { 460 QDict *value = qobject_to_qdict(obj); 461 dump_qdict(func_fprintf, f, comp_indent, value); 462 break; 463 } 464 case QTYPE_QLIST: { 465 QList *value = qobject_to_qlist(obj); 466 dump_qlist(func_fprintf, f, comp_indent, value); 467 break; 468 } 469 case QTYPE_QFLOAT: { 470 QFloat *value = qobject_to_qfloat(obj); 471 func_fprintf(f, "%g", qfloat_get_double(value)); 472 break; 473 } 474 case QTYPE_QBOOL: { 475 QBool *value = qobject_to_qbool(obj); 476 func_fprintf(f, "%s", qbool_get_int(value) ? "true" : "false"); 477 break; 478 } 479 case QTYPE_QERROR: { 480 QString *value = qerror_human((QError *)obj); 481 func_fprintf(f, "%s", qstring_get_str(value)); 482 QDECREF(value); 483 break; 484 } 485 case QTYPE_NONE: 486 break; 487 case QTYPE_MAX: 488 default: 489 abort(); 490 } 491 } 492 493 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation, 494 QList *list) 495 { 496 const QListEntry *entry; 497 int i = 0; 498 499 for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) { 500 qtype_code type = qobject_type(entry->value); 501 bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST); 502 const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: "; 503 504 func_fprintf(f, format, indentation * 4, "", i); 505 dump_qobject(func_fprintf, f, indentation + 1, entry->value); 506 if (!composite) { 507 func_fprintf(f, "\n"); 508 } 509 } 510 } 511 512 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation, 513 QDict *dict) 514 { 515 const QDictEntry *entry; 516 517 for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) { 518 qtype_code type = qobject_type(entry->value); 519 bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST); 520 const char *format = composite ? "%*s%s:\n" : "%*s%s: "; 521 char key[strlen(entry->key) + 1]; 522 int i; 523 524 /* replace dashes with spaces in key (variable) names */ 525 for (i = 0; entry->key[i]; i++) { 526 key[i] = entry->key[i] == '-' ? ' ' : entry->key[i]; 527 } 528 key[i] = 0; 529 530 func_fprintf(f, format, indentation * 4, "", key); 531 dump_qobject(func_fprintf, f, indentation + 1, entry->value); 532 if (!composite) { 533 func_fprintf(f, "\n"); 534 } 535 } 536 } 537 538 void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f, 539 ImageInfoSpecific *info_spec) 540 { 541 QmpOutputVisitor *ov = qmp_output_visitor_new(); 542 QObject *obj, *data; 543 544 visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL, 545 &error_abort); 546 obj = qmp_output_get_qobject(ov); 547 assert(qobject_type(obj) == QTYPE_QDICT); 548 data = qdict_get(qobject_to_qdict(obj), "data"); 549 dump_qobject(func_fprintf, f, 1, data); 550 qmp_output_visitor_cleanup(ov); 551 } 552 553 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f, 554 ImageInfo *info) 555 { 556 char size_buf[128], dsize_buf[128]; 557 if (!info->has_actual_size) { 558 snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); 559 } else { 560 get_human_readable_size(dsize_buf, sizeof(dsize_buf), 561 info->actual_size); 562 } 563 get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size); 564 func_fprintf(f, 565 "image: %s\n" 566 "file format: %s\n" 567 "virtual size: %s (%" PRId64 " bytes)\n" 568 "disk size: %s\n", 569 info->filename, info->format, size_buf, 570 info->virtual_size, 571 dsize_buf); 572 573 if (info->has_encrypted && info->encrypted) { 574 func_fprintf(f, "encrypted: yes\n"); 575 } 576 577 if (info->has_cluster_size) { 578 func_fprintf(f, "cluster_size: %" PRId64 "\n", 579 info->cluster_size); 580 } 581 582 if (info->has_dirty_flag && info->dirty_flag) { 583 func_fprintf(f, "cleanly shut down: no\n"); 584 } 585 586 if (info->has_backing_filename) { 587 func_fprintf(f, "backing file: %s", info->backing_filename); 588 if (info->has_full_backing_filename) { 589 func_fprintf(f, " (actual path: %s)", info->full_backing_filename); 590 } 591 func_fprintf(f, "\n"); 592 if (info->has_backing_filename_format) { 593 func_fprintf(f, "backing file format: %s\n", 594 info->backing_filename_format); 595 } 596 } 597 598 if (info->has_snapshots) { 599 SnapshotInfoList *elem; 600 601 func_fprintf(f, "Snapshot list:\n"); 602 bdrv_snapshot_dump(func_fprintf, f, NULL); 603 func_fprintf(f, "\n"); 604 605 /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but 606 * we convert to the block layer's native QEMUSnapshotInfo for now. 607 */ 608 for (elem = info->snapshots; elem; elem = elem->next) { 609 QEMUSnapshotInfo sn = { 610 .vm_state_size = elem->value->vm_state_size, 611 .date_sec = elem->value->date_sec, 612 .date_nsec = elem->value->date_nsec, 613 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL + 614 elem->value->vm_clock_nsec, 615 }; 616 617 pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id); 618 pstrcpy(sn.name, sizeof(sn.name), elem->value->name); 619 bdrv_snapshot_dump(func_fprintf, f, &sn); 620 func_fprintf(f, "\n"); 621 } 622 } 623 624 if (info->has_format_specific) { 625 func_fprintf(f, "Format specific information:\n"); 626 bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific); 627 } 628 } 629