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 #ifdef __linux__ 32 #include <linux/fs.h> 33 #include <sys/ioctl.h> 34 #ifndef FS_NOCOW_FL 35 #define FS_NOCOW_FL 0x00800000 /* Do not cow file */ 36 #endif 37 #endif 38 39 BlockDeviceInfo *bdrv_block_device_info(BlockDriverState *bs) 40 { 41 BlockDeviceInfo *info = g_malloc0(sizeof(*info)); 42 43 info->file = g_strdup(bs->filename); 44 info->ro = bs->read_only; 45 info->drv = g_strdup(bs->drv->format_name); 46 info->encrypted = bs->encrypted; 47 info->encryption_key_missing = bdrv_key_required(bs); 48 49 if (bs->node_name[0]) { 50 info->has_node_name = true; 51 info->node_name = g_strdup(bs->node_name); 52 } 53 54 if (bs->backing_file[0]) { 55 info->has_backing_file = true; 56 info->backing_file = g_strdup(bs->backing_file); 57 } 58 59 info->backing_file_depth = bdrv_get_backing_file_depth(bs); 60 info->detect_zeroes = bs->detect_zeroes; 61 62 if (bs->io_limits_enabled) { 63 ThrottleConfig cfg; 64 throttle_get_config(&bs->throttle_state, &cfg); 65 info->bps = cfg.buckets[THROTTLE_BPS_TOTAL].avg; 66 info->bps_rd = cfg.buckets[THROTTLE_BPS_READ].avg; 67 info->bps_wr = cfg.buckets[THROTTLE_BPS_WRITE].avg; 68 69 info->iops = cfg.buckets[THROTTLE_OPS_TOTAL].avg; 70 info->iops_rd = cfg.buckets[THROTTLE_OPS_READ].avg; 71 info->iops_wr = cfg.buckets[THROTTLE_OPS_WRITE].avg; 72 73 info->has_bps_max = cfg.buckets[THROTTLE_BPS_TOTAL].max; 74 info->bps_max = cfg.buckets[THROTTLE_BPS_TOTAL].max; 75 info->has_bps_rd_max = cfg.buckets[THROTTLE_BPS_READ].max; 76 info->bps_rd_max = cfg.buckets[THROTTLE_BPS_READ].max; 77 info->has_bps_wr_max = cfg.buckets[THROTTLE_BPS_WRITE].max; 78 info->bps_wr_max = cfg.buckets[THROTTLE_BPS_WRITE].max; 79 80 info->has_iops_max = cfg.buckets[THROTTLE_OPS_TOTAL].max; 81 info->iops_max = cfg.buckets[THROTTLE_OPS_TOTAL].max; 82 info->has_iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max; 83 info->iops_rd_max = cfg.buckets[THROTTLE_OPS_READ].max; 84 info->has_iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max; 85 info->iops_wr_max = cfg.buckets[THROTTLE_OPS_WRITE].max; 86 87 info->has_iops_size = cfg.op_size; 88 info->iops_size = cfg.op_size; 89 } 90 91 return info; 92 } 93 94 /* 95 * Returns 0 on success, with *p_list either set to describe snapshot 96 * information, or NULL because there are no snapshots. Returns -errno on 97 * error, with *p_list untouched. 98 */ 99 int bdrv_query_snapshot_info_list(BlockDriverState *bs, 100 SnapshotInfoList **p_list, 101 Error **errp) 102 { 103 int i, sn_count; 104 QEMUSnapshotInfo *sn_tab = NULL; 105 SnapshotInfoList *info_list, *cur_item = NULL, *head = NULL; 106 SnapshotInfo *info; 107 108 sn_count = bdrv_snapshot_list(bs, &sn_tab); 109 if (sn_count < 0) { 110 const char *dev = bdrv_get_device_name(bs); 111 switch (sn_count) { 112 case -ENOMEDIUM: 113 error_setg(errp, "Device '%s' is not inserted", dev); 114 break; 115 case -ENOTSUP: 116 error_setg(errp, 117 "Device '%s' does not support internal snapshots", 118 dev); 119 break; 120 default: 121 error_setg_errno(errp, -sn_count, 122 "Can't list snapshots of device '%s'", dev); 123 break; 124 } 125 return sn_count; 126 } 127 128 for (i = 0; i < sn_count; i++) { 129 info = g_new0(SnapshotInfo, 1); 130 info->id = g_strdup(sn_tab[i].id_str); 131 info->name = g_strdup(sn_tab[i].name); 132 info->vm_state_size = sn_tab[i].vm_state_size; 133 info->date_sec = sn_tab[i].date_sec; 134 info->date_nsec = sn_tab[i].date_nsec; 135 info->vm_clock_sec = sn_tab[i].vm_clock_nsec / 1000000000; 136 info->vm_clock_nsec = sn_tab[i].vm_clock_nsec % 1000000000; 137 138 info_list = g_new0(SnapshotInfoList, 1); 139 info_list->value = info; 140 141 /* XXX: waiting for the qapi to support qemu-queue.h types */ 142 if (!cur_item) { 143 head = cur_item = info_list; 144 } else { 145 cur_item->next = info_list; 146 cur_item = info_list; 147 } 148 149 } 150 151 g_free(sn_tab); 152 *p_list = head; 153 return 0; 154 } 155 156 /** 157 * bdrv_query_image_info: 158 * @bs: block device to examine 159 * @p_info: location to store image information 160 * @errp: location to store error information 161 * 162 * Store "flat" image information in @p_info. 163 * 164 * "Flat" means it does *not* query backing image information, 165 * i.e. (*pinfo)->has_backing_image will be set to false and 166 * (*pinfo)->backing_image to NULL even when the image does in fact have 167 * a backing image. 168 * 169 * @p_info will be set only on success. On error, store error in @errp. 170 */ 171 void bdrv_query_image_info(BlockDriverState *bs, 172 ImageInfo **p_info, 173 Error **errp) 174 { 175 int64_t size; 176 const char *backing_filename; 177 char backing_filename2[1024]; 178 BlockDriverInfo bdi; 179 int ret; 180 Error *err = NULL; 181 ImageInfo *info; 182 #ifdef __linux__ 183 int fd, attr; 184 #endif 185 186 size = bdrv_getlength(bs); 187 if (size < 0) { 188 error_setg_errno(errp, -size, "Can't get size of device '%s'", 189 bdrv_get_device_name(bs)); 190 return; 191 } 192 193 info = g_new0(ImageInfo, 1); 194 info->filename = g_strdup(bs->filename); 195 info->format = g_strdup(bdrv_get_format_name(bs)); 196 info->virtual_size = size; 197 info->actual_size = bdrv_get_allocated_file_size(bs); 198 info->has_actual_size = info->actual_size >= 0; 199 if (bdrv_is_encrypted(bs)) { 200 info->encrypted = true; 201 info->has_encrypted = true; 202 } 203 if (bdrv_get_info(bs, &bdi) >= 0) { 204 if (bdi.cluster_size != 0) { 205 info->cluster_size = bdi.cluster_size; 206 info->has_cluster_size = true; 207 } 208 info->dirty_flag = bdi.is_dirty; 209 info->has_dirty_flag = true; 210 } 211 info->format_specific = bdrv_get_specific_info(bs); 212 info->has_format_specific = info->format_specific != NULL; 213 214 #ifdef __linux__ 215 /* get NOCOW info */ 216 fd = qemu_open(bs->filename, O_RDONLY | O_NONBLOCK); 217 if (fd >= 0) { 218 if (ioctl(fd, FS_IOC_GETFLAGS, &attr) == 0 && (attr & FS_NOCOW_FL)) { 219 info->has_nocow = true; 220 info->nocow = true; 221 } 222 qemu_close(fd); 223 } 224 #endif 225 226 backing_filename = bs->backing_file; 227 if (backing_filename[0] != '\0') { 228 info->backing_filename = g_strdup(backing_filename); 229 info->has_backing_filename = true; 230 bdrv_get_full_backing_filename(bs, backing_filename2, 231 sizeof(backing_filename2)); 232 233 if (strcmp(backing_filename, backing_filename2) != 0) { 234 info->full_backing_filename = 235 g_strdup(backing_filename2); 236 info->has_full_backing_filename = true; 237 } 238 239 if (bs->backing_format[0]) { 240 info->backing_filename_format = g_strdup(bs->backing_format); 241 info->has_backing_filename_format = true; 242 } 243 } 244 245 ret = bdrv_query_snapshot_info_list(bs, &info->snapshots, &err); 246 switch (ret) { 247 case 0: 248 if (info->snapshots) { 249 info->has_snapshots = true; 250 } 251 break; 252 /* recoverable error */ 253 case -ENOMEDIUM: 254 case -ENOTSUP: 255 error_free(err); 256 break; 257 default: 258 error_propagate(errp, err); 259 qapi_free_ImageInfo(info); 260 return; 261 } 262 263 *p_info = info; 264 } 265 266 /* @p_info will be set only on success. */ 267 void bdrv_query_info(BlockDriverState *bs, 268 BlockInfo **p_info, 269 Error **errp) 270 { 271 BlockInfo *info = g_malloc0(sizeof(*info)); 272 BlockDriverState *bs0; 273 ImageInfo **p_image_info; 274 Error *local_err = NULL; 275 info->device = g_strdup(bs->device_name); 276 info->type = g_strdup("unknown"); 277 info->locked = bdrv_dev_is_medium_locked(bs); 278 info->removable = bdrv_dev_has_removable_media(bs); 279 280 if (bdrv_dev_has_removable_media(bs)) { 281 info->has_tray_open = true; 282 info->tray_open = bdrv_dev_is_tray_open(bs); 283 } 284 285 if (bdrv_iostatus_is_enabled(bs)) { 286 info->has_io_status = true; 287 info->io_status = bs->iostatus; 288 } 289 290 if (!QLIST_EMPTY(&bs->dirty_bitmaps)) { 291 info->has_dirty_bitmaps = true; 292 info->dirty_bitmaps = bdrv_query_dirty_bitmaps(bs); 293 } 294 295 if (bs->drv) { 296 info->has_inserted = true; 297 info->inserted = bdrv_block_device_info(bs); 298 299 bs0 = bs; 300 p_image_info = &info->inserted->image; 301 while (1) { 302 bdrv_query_image_info(bs0, p_image_info, &local_err); 303 if (local_err) { 304 error_propagate(errp, local_err); 305 goto err; 306 } 307 if (bs0->drv && bs0->backing_hd) { 308 bs0 = bs0->backing_hd; 309 (*p_image_info)->has_backing_image = true; 310 p_image_info = &((*p_image_info)->backing_image); 311 } else { 312 break; 313 } 314 } 315 } 316 317 *p_info = info; 318 return; 319 320 err: 321 qapi_free_BlockInfo(info); 322 } 323 324 static BlockStats *bdrv_query_stats(const BlockDriverState *bs) 325 { 326 BlockStats *s; 327 328 s = g_malloc0(sizeof(*s)); 329 330 if (bs->device_name[0]) { 331 s->has_device = true; 332 s->device = g_strdup(bs->device_name); 333 } 334 335 s->stats = g_malloc0(sizeof(*s->stats)); 336 s->stats->rd_bytes = bs->stats.nr_bytes[BLOCK_ACCT_READ]; 337 s->stats->wr_bytes = bs->stats.nr_bytes[BLOCK_ACCT_WRITE]; 338 s->stats->rd_operations = bs->stats.nr_ops[BLOCK_ACCT_READ]; 339 s->stats->wr_operations = bs->stats.nr_ops[BLOCK_ACCT_WRITE]; 340 s->stats->wr_highest_offset = 341 bs->stats.wr_highest_sector * BDRV_SECTOR_SIZE; 342 s->stats->flush_operations = bs->stats.nr_ops[BLOCK_ACCT_FLUSH]; 343 s->stats->wr_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_WRITE]; 344 s->stats->rd_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_READ]; 345 s->stats->flush_total_time_ns = bs->stats.total_time_ns[BLOCK_ACCT_FLUSH]; 346 347 if (bs->file) { 348 s->has_parent = true; 349 s->parent = bdrv_query_stats(bs->file); 350 } 351 352 if (bs->backing_hd) { 353 s->has_backing = true; 354 s->backing = bdrv_query_stats(bs->backing_hd); 355 } 356 357 return s; 358 } 359 360 BlockInfoList *qmp_query_block(Error **errp) 361 { 362 BlockInfoList *head = NULL, **p_next = &head; 363 BlockDriverState *bs = NULL; 364 Error *local_err = NULL; 365 366 while ((bs = bdrv_next(bs))) { 367 BlockInfoList *info = g_malloc0(sizeof(*info)); 368 bdrv_query_info(bs, &info->value, &local_err); 369 if (local_err) { 370 error_propagate(errp, local_err); 371 goto err; 372 } 373 374 *p_next = info; 375 p_next = &info->next; 376 } 377 378 return head; 379 380 err: 381 qapi_free_BlockInfoList(head); 382 return NULL; 383 } 384 385 BlockStatsList *qmp_query_blockstats(Error **errp) 386 { 387 BlockStatsList *head = NULL, **p_next = &head; 388 BlockDriverState *bs = NULL; 389 390 while ((bs = bdrv_next(bs))) { 391 BlockStatsList *info = g_malloc0(sizeof(*info)); 392 AioContext *ctx = bdrv_get_aio_context(bs); 393 394 aio_context_acquire(ctx); 395 info->value = bdrv_query_stats(bs); 396 aio_context_release(ctx); 397 398 *p_next = info; 399 p_next = &info->next; 400 } 401 402 return head; 403 } 404 405 #define NB_SUFFIXES 4 406 407 static char *get_human_readable_size(char *buf, int buf_size, int64_t size) 408 { 409 static const char suffixes[NB_SUFFIXES] = "KMGT"; 410 int64_t base; 411 int i; 412 413 if (size <= 999) { 414 snprintf(buf, buf_size, "%" PRId64, size); 415 } else { 416 base = 1024; 417 for (i = 0; i < NB_SUFFIXES; i++) { 418 if (size < (10 * base)) { 419 snprintf(buf, buf_size, "%0.1f%c", 420 (double)size / base, 421 suffixes[i]); 422 break; 423 } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { 424 snprintf(buf, buf_size, "%" PRId64 "%c", 425 ((size + (base >> 1)) / base), 426 suffixes[i]); 427 break; 428 } 429 base = base * 1024; 430 } 431 } 432 return buf; 433 } 434 435 void bdrv_snapshot_dump(fprintf_function func_fprintf, void *f, 436 QEMUSnapshotInfo *sn) 437 { 438 char buf1[128], date_buf[128], clock_buf[128]; 439 struct tm tm; 440 time_t ti; 441 int64_t secs; 442 443 if (!sn) { 444 func_fprintf(f, 445 "%-10s%-20s%7s%20s%15s", 446 "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); 447 } else { 448 ti = sn->date_sec; 449 localtime_r(&ti, &tm); 450 strftime(date_buf, sizeof(date_buf), 451 "%Y-%m-%d %H:%M:%S", &tm); 452 secs = sn->vm_clock_nsec / 1000000000; 453 snprintf(clock_buf, sizeof(clock_buf), 454 "%02d:%02d:%02d.%03d", 455 (int)(secs / 3600), 456 (int)((secs / 60) % 60), 457 (int)(secs % 60), 458 (int)((sn->vm_clock_nsec / 1000000) % 1000)); 459 func_fprintf(f, 460 "%-10s%-20s%7s%20s%15s", 461 sn->id_str, sn->name, 462 get_human_readable_size(buf1, sizeof(buf1), 463 sn->vm_state_size), 464 date_buf, 465 clock_buf); 466 } 467 } 468 469 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation, 470 QDict *dict); 471 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation, 472 QList *list); 473 474 static void dump_qobject(fprintf_function func_fprintf, void *f, 475 int comp_indent, QObject *obj) 476 { 477 switch (qobject_type(obj)) { 478 case QTYPE_QINT: { 479 QInt *value = qobject_to_qint(obj); 480 func_fprintf(f, "%" PRId64, qint_get_int(value)); 481 break; 482 } 483 case QTYPE_QSTRING: { 484 QString *value = qobject_to_qstring(obj); 485 func_fprintf(f, "%s", qstring_get_str(value)); 486 break; 487 } 488 case QTYPE_QDICT: { 489 QDict *value = qobject_to_qdict(obj); 490 dump_qdict(func_fprintf, f, comp_indent, value); 491 break; 492 } 493 case QTYPE_QLIST: { 494 QList *value = qobject_to_qlist(obj); 495 dump_qlist(func_fprintf, f, comp_indent, value); 496 break; 497 } 498 case QTYPE_QFLOAT: { 499 QFloat *value = qobject_to_qfloat(obj); 500 func_fprintf(f, "%g", qfloat_get_double(value)); 501 break; 502 } 503 case QTYPE_QBOOL: { 504 QBool *value = qobject_to_qbool(obj); 505 func_fprintf(f, "%s", qbool_get_int(value) ? "true" : "false"); 506 break; 507 } 508 case QTYPE_QERROR: { 509 QString *value = qerror_human((QError *)obj); 510 func_fprintf(f, "%s", qstring_get_str(value)); 511 QDECREF(value); 512 break; 513 } 514 case QTYPE_NONE: 515 break; 516 case QTYPE_MAX: 517 default: 518 abort(); 519 } 520 } 521 522 static void dump_qlist(fprintf_function func_fprintf, void *f, int indentation, 523 QList *list) 524 { 525 const QListEntry *entry; 526 int i = 0; 527 528 for (entry = qlist_first(list); entry; entry = qlist_next(entry), i++) { 529 qtype_code type = qobject_type(entry->value); 530 bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST); 531 const char *format = composite ? "%*s[%i]:\n" : "%*s[%i]: "; 532 533 func_fprintf(f, format, indentation * 4, "", i); 534 dump_qobject(func_fprintf, f, indentation + 1, entry->value); 535 if (!composite) { 536 func_fprintf(f, "\n"); 537 } 538 } 539 } 540 541 static void dump_qdict(fprintf_function func_fprintf, void *f, int indentation, 542 QDict *dict) 543 { 544 const QDictEntry *entry; 545 546 for (entry = qdict_first(dict); entry; entry = qdict_next(dict, entry)) { 547 qtype_code type = qobject_type(entry->value); 548 bool composite = (type == QTYPE_QDICT || type == QTYPE_QLIST); 549 const char *format = composite ? "%*s%s:\n" : "%*s%s: "; 550 char key[strlen(entry->key) + 1]; 551 int i; 552 553 /* replace dashes with spaces in key (variable) names */ 554 for (i = 0; entry->key[i]; i++) { 555 key[i] = entry->key[i] == '-' ? ' ' : entry->key[i]; 556 } 557 key[i] = 0; 558 559 func_fprintf(f, format, indentation * 4, "", key); 560 dump_qobject(func_fprintf, f, indentation + 1, entry->value); 561 if (!composite) { 562 func_fprintf(f, "\n"); 563 } 564 } 565 } 566 567 void bdrv_image_info_specific_dump(fprintf_function func_fprintf, void *f, 568 ImageInfoSpecific *info_spec) 569 { 570 QmpOutputVisitor *ov = qmp_output_visitor_new(); 571 QObject *obj, *data; 572 573 visit_type_ImageInfoSpecific(qmp_output_get_visitor(ov), &info_spec, NULL, 574 &error_abort); 575 obj = qmp_output_get_qobject(ov); 576 assert(qobject_type(obj) == QTYPE_QDICT); 577 data = qdict_get(qobject_to_qdict(obj), "data"); 578 dump_qobject(func_fprintf, f, 1, data); 579 qmp_output_visitor_cleanup(ov); 580 } 581 582 void bdrv_image_info_dump(fprintf_function func_fprintf, void *f, 583 ImageInfo *info) 584 { 585 char size_buf[128], dsize_buf[128]; 586 if (!info->has_actual_size) { 587 snprintf(dsize_buf, sizeof(dsize_buf), "unavailable"); 588 } else { 589 get_human_readable_size(dsize_buf, sizeof(dsize_buf), 590 info->actual_size); 591 } 592 get_human_readable_size(size_buf, sizeof(size_buf), info->virtual_size); 593 func_fprintf(f, 594 "image: %s\n" 595 "file format: %s\n" 596 "virtual size: %s (%" PRId64 " bytes)\n" 597 "disk size: %s\n", 598 info->filename, info->format, size_buf, 599 info->virtual_size, 600 dsize_buf); 601 602 if (info->has_encrypted && info->encrypted) { 603 func_fprintf(f, "encrypted: yes\n"); 604 } 605 606 if (info->has_cluster_size) { 607 func_fprintf(f, "cluster_size: %" PRId64 "\n", 608 info->cluster_size); 609 } 610 611 if (info->has_dirty_flag && info->dirty_flag) { 612 func_fprintf(f, "cleanly shut down: no\n"); 613 } 614 615 if (info->has_backing_filename) { 616 func_fprintf(f, "backing file: %s", info->backing_filename); 617 if (info->has_full_backing_filename) { 618 func_fprintf(f, " (actual path: %s)", info->full_backing_filename); 619 } 620 func_fprintf(f, "\n"); 621 if (info->has_backing_filename_format) { 622 func_fprintf(f, "backing file format: %s\n", 623 info->backing_filename_format); 624 } 625 } 626 627 if (info->has_snapshots) { 628 SnapshotInfoList *elem; 629 630 func_fprintf(f, "Snapshot list:\n"); 631 bdrv_snapshot_dump(func_fprintf, f, NULL); 632 func_fprintf(f, "\n"); 633 634 /* Ideally bdrv_snapshot_dump() would operate on SnapshotInfoList but 635 * we convert to the block layer's native QEMUSnapshotInfo for now. 636 */ 637 for (elem = info->snapshots; elem; elem = elem->next) { 638 QEMUSnapshotInfo sn = { 639 .vm_state_size = elem->value->vm_state_size, 640 .date_sec = elem->value->date_sec, 641 .date_nsec = elem->value->date_nsec, 642 .vm_clock_nsec = elem->value->vm_clock_sec * 1000000000ULL + 643 elem->value->vm_clock_nsec, 644 }; 645 646 pstrcpy(sn.id_str, sizeof(sn.id_str), elem->value->id); 647 pstrcpy(sn.name, sizeof(sn.name), elem->value->name); 648 bdrv_snapshot_dump(func_fprintf, f, &sn); 649 func_fprintf(f, "\n"); 650 } 651 } 652 653 if (info->has_format_specific) { 654 func_fprintf(f, "Format specific information:\n"); 655 bdrv_image_info_specific_dump(func_fprintf, f, info->format_specific); 656 } 657 658 if (info->has_nocow && info->nocow) { 659 func_fprintf(f, "NOCOW flag: set\n"); 660 } 661 } 662