cmds-device.c

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public
   4  * License v2 as published by the Free Software Foundation.
   5  *
   6  * This program is distributed in the hope that it will be useful,
   7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   9  * General Public License for more details.
  10  *
  11  * You should have received a copy of the GNU General Public
  12  * License along with this program; if not, write to the
  13  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  14  * Boston, MA 021110-1307, USA.
  15  */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21 #include <fcntl.h>
  22 #include <sys/ioctl.h>
  23 #include <errno.h>
  24 #include <sys/stat.h>
  25 #include <getopt.h>
  26
  27 #include "kerncompat.h"
  28 #include "ctree.h"
  29 #include "ioctl.h"
  30 #include "utils.h"
  31 #include "cmds-fi-usage.h"
  32
  33 #include "commands.h"
  34
  35 static const char * const device_cmd_group_usage[] = {
  36         "btrfs device <command> [<args>]",
  37         NULL
  38 };
  39
  40 static const char * const cmd_device_add_usage[] = {
  41         "btrfs device add [options] <device> [<device>...] <path>",
  42         "Add a device to a filesystem",
  43         "-K|--nodiscard    do not perform whole device TRIM",
  44         "-f|--force        force overwrite existing filesystem on the disk",
  45         NULL
  46 };
  47
  48 static int cmd_device_add(int argc, char **argv)
  49 {
  50         char    *mntpnt;
  51         int     i, fdmnt, ret=0, e;
  52         DIR     *dirstream = NULL;
  53         int discard = 1;
  54         int force = 0;
  55
  56         while (1) {
  57                 int c;
  58                 static const struct option long_options[] = {
  59                         { "nodiscard", optional_argument, NULL, 'K'},
  60                         { "force", no_argument, NULL, 'f'},
  61                         { NULL, 0, NULL, 0}
  62                 };
  63
  64                 c = getopt_long(argc, argv, "Kf", long_options, NULL);
  65                 if (c < 0)
  66                         break;
  67                 switch (c) {
  68                 case 'K':
  69                         discard = 0;
  70                         break;
  71                 case 'f':
  72                         force = 1;
  73                         break;
  74                 default:
  75                         usage(cmd_device_add_usage);
  76                 }
  77         }
  78
  79         argc = argc - optind;
  80
  81         if (check_argc_min(argc, 2))
  82                 usage(cmd_device_add_usage);
  83
  84         mntpnt = argv[optind + argc - 1];
  85
  86         fdmnt = open_file_or_dir(mntpnt, &dirstream);
  87         if (fdmnt < 0) {
  88                 fprintf(stderr, "ERROR: can't access '%s'\n", mntpnt);
  89                 return 1;
  90         }
  91
  92         for (i = optind; i < optind + argc - 1; i++){
  93                 struct btrfs_ioctl_vol_args ioctl_args;
  94                 int     devfd, res;
  95                 u64 dev_block_count = 0;
  96                 int mixed = 0;
  97                 char *path;
  98
  99                 res = test_dev_for_mkfs(argv[i], force);
 100                 if (res) {
 101                         ret++;
 102                         continue;
 103                 }
 104
 105                 devfd = open(argv[i], O_RDWR);
 106                 if (devfd < 0) {
 107                         fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
 108                         ret++;
 109                         continue;
 110                 }
 111
 112                 res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count,
 113                                            0, &mixed, discard);
 114                 close(devfd);
 115                 if (res) {
 116                         ret++;
 117                         goto error_out;
 118                 }
 119
 120                 path = canonicalize_path(argv[i]);
 121                 if (!path) {
 122                         fprintf(stderr,
 123                                 "ERROR: Could not canonicalize pathname '%s': %s\n",
 124                                 argv[i], strerror(errno));
 125                         ret++;
 126                         goto error_out;
 127                 }
 128
 129                 memset(&ioctl_args, 0, sizeof(ioctl_args));
 130                 strncpy_null(ioctl_args.name, path);
 131                 res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
 132                 e = errno;
 133                 if (res < 0) {
 134                         fprintf(stderr, "ERROR: error adding the device '%s' - %s\n",
 135                                 path, strerror(e));
 136                         ret++;
 137                 }
 138                 free(path);
 139         }
 140
 141 error_out:
 142         close_file_or_dir(fdmnt, dirstream);
 143         return !!ret;
 144 }
 145
 146 static int _cmd_device_remove(int argc, char **argv,
 147                 const char * const *usagestr)
 148 {
 149         char    *mntpnt;
 150         int     i, fdmnt, ret=0, e;
 151         DIR     *dirstream = NULL;
 152
 153         if (check_argc_min(argc, 3))
 154                 usage(usagestr);
 155
 156         mntpnt = argv[argc - 1];
 157
 158         fdmnt = open_file_or_dir(mntpnt, &dirstream);
 159         if (fdmnt < 0) {
 160                 fprintf(stderr, "ERROR: can't access '%s'\n", mntpnt);
 161                 return 1;
 162         }
 163
 164         for(i=1 ; i < argc - 1; i++ ){
 165                 struct  btrfs_ioctl_vol_args arg;
 166                 int     res;
 167
 168                 if (!is_block_device(argv[i])) {
 169                         fprintf(stderr,
 170                                 "ERROR: %s is not a block device\n", argv[i]);
 171                         ret++;
 172                         continue;
 173                 }
 174                 memset(&arg, 0, sizeof(arg));
 175                 strncpy_null(arg.name, argv[i]);
 176                 res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
 177                 e = errno;
 178                 if (res) {
 179                         const char *msg;
 180
 181                         if (res > 0)
 182                                 msg = btrfs_err_str(res);
 183                         else
 184                                 msg = strerror(e);
 185                         fprintf(stderr,
 186                                 "ERROR: error removing the device '%s' - %s\n",
 187                                 argv[i], msg);
 188                         ret++;
 189                 }
 190         }
 191
 192         close_file_or_dir(fdmnt, dirstream);
 193         return !!ret;
 194 }
 195
 196 static const char * const cmd_device_remove_usage[] = {
 197         "btrfs device remove <device> [<device>...] <path>",
 198         "Remove a device from a filesystem",
 199         NULL
 200 };
 201
 202 static int cmd_device_remove(int argc, char **argv)
 203 {
 204         return _cmd_device_remove(argc, argv, cmd_device_remove_usage);
 205 }
 206
 207 static const char * const cmd_device_delete_usage[] = {
 208         "btrfs device delete <device> [<device>...] <path>",
 209         "Remove a device from a filesystem",
 210         NULL
 211 };
 212
 213 static int cmd_device_delete(int argc, char **argv)
 214 {
 215         return _cmd_device_remove(argc, argv, cmd_device_delete_usage);
 216 }
 217
 218 static const char * const cmd_device_scan_usage[] = {
 219         "btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
 220         "Scan devices for a btrfs filesystem",
 221         " -d|--all-devices (deprecated)",
 222         NULL
 223 };
 224
 225 static int cmd_device_scan(int argc, char **argv)
 226 {
 227         int i;
 228         int devstart = 1;
 229         int all = 0;
 230         int ret = 0;
 231
 232         optind = 1;
 233         while (1) {
 234                 int c;
 235                 static const struct option long_options[] = {
 236                         { "all-devices", no_argument, NULL, 'd'},
 237                         { NULL, 0, NULL, 0}
 238                 };
 239
 240                 c = getopt_long(argc, argv, "d", long_options, NULL);
 241                 if (c < 0)
 242                         break;
 243                 switch (c) {
 244                 case 'd':
 245                         all = 1;
 246                         break;
 247                 default:
 248                         usage(cmd_device_scan_usage);
 249                 }
 250         }
 251
 252         if (all && check_argc_max(argc, 2))
 253                 usage(cmd_device_scan_usage);
 254
 255         if (all || argc == 1) {
 256                 printf("Scanning for Btrfs filesystems\n");
 257                 ret = btrfs_scan_lblkid();
 258                 if (ret)
 259                         fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 260                 ret = btrfs_register_all_devices();
 261                 if (ret)
 262                         fprintf(stderr, "ERROR: error %d while registering\n", ret);
 263                 goto out;
 264         }
 265
 266         for( i = devstart ; i < argc ; i++ ){
 267                 char *path;
 268
 269                 if (!is_block_device(argv[i])) {
 270                         fprintf(stderr,
 271                                 "ERROR: %s is not a block device\n", argv[i]);
 272                         ret = 1;
 273                         goto out;
 274                 }
 275                 path = canonicalize_path(argv[i]);
 276                 if (!path) {
 277                         fprintf(stderr,
 278                                 "ERROR: Could not canonicalize path '%s': %s\n",
 279                                 argv[i], strerror(errno));
 280                         ret = 1;
 281                         goto out;
 282                 }
 283                 printf("Scanning for Btrfs filesystems in '%s'\n", path);
 284                 if (btrfs_register_one_device(path) != 0) {
 285                         ret = 1;
 286                         free(path);
 287                         goto out;
 288                 }
 289                 free(path);
 290         }
 291
 292 out:
 293         return !!ret;
 294 }
 295
 296 static const char * const cmd_device_ready_usage[] = {
 297         "btrfs device ready <device>",
 298         "Check device to see if it has all of its devices in cache for mounting",
 299         NULL
 300 };
 301
 302 static int cmd_device_ready(int argc, char **argv)
 303 {
 304         struct  btrfs_ioctl_vol_args args;
 305         int     fd;
 306         int     ret;
 307         char    *path;
 308
 309         if (check_argc_min(argc, 2))
 310                 usage(cmd_device_ready_usage);
 311
 312         fd = open("/dev/btrfs-control", O_RDWR);
 313         if (fd < 0) {
 314                 perror("failed to open /dev/btrfs-control");
 315                 return 1;
 316         }
 317
 318         path = canonicalize_path(argv[argc - 1]);
 319         if (!path) {
 320                 fprintf(stderr,
 321                         "ERROR: Could not canonicalize pathname '%s': %s\n",
 322                         argv[argc - 1], strerror(errno));
 323                 ret = 1;
 324                 goto out;
 325         }
 326
 327         if (!is_block_device(path)) {
 328                 fprintf(stderr,
 329                         "ERROR: %s is not a block device\n", path);
 330                 ret = 1;
 331                 goto out;
 332         }
 333
 334         memset(&args, 0, sizeof(args));
 335         strncpy_null(args.name, path);
 336         ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
 337         if (ret < 0) {
 338                 fprintf(stderr, "ERROR: unable to determine if the device '%s'"
 339                         " is ready for mounting - %s\n", path,
 340                         strerror(errno));
 341                 ret = 1;
 342         }
 343
 344 out:
 345         free(path);
 346         close(fd);
 347         return ret;
 348 }
 349
 350 static const char * const cmd_device_stats_usage[] = {
 351         "btrfs device stats [-z] <path>|<device>",
 352         "Show current device IO stats. -z to reset stats afterwards.",
 353         NULL
 354 };
 355
 356 static int cmd_device_stats(int argc, char **argv)
 357 {
 358         char *dev_path;
 359         struct btrfs_ioctl_fs_info_args fi_args;
 360         struct btrfs_ioctl_dev_info_args *di_args = NULL;
 361         int ret;
 362         int fdmnt;
 363         int i;
 364         int c;
 365         int err = 0;
 366         __u64 flags = 0;
 367         DIR *dirstream = NULL;
 368
 369         optind = 1;
 370         while ((c = getopt(argc, argv, "z")) != -1) {
 371                 switch (c) {
 372                 case 'z':
 373                         flags = BTRFS_DEV_STATS_RESET;
 374                         break;
 375                 case '?':
 376                 default:
 377                         usage(cmd_device_stats_usage);
 378                 }
 379         }
 380
 381         argc = argc - optind;
 382         if (check_argc_exact(argc, 1))
 383                 usage(cmd_device_stats_usage);
 384
 385         dev_path = argv[optind];
 386
 387         fdmnt = open_path_or_dev_mnt(dev_path, &dirstream);
 388
 389         if (fdmnt < 0) {
 390                 if (errno == EINVAL)
 391                         fprintf(stderr,
 392                                 "ERROR: '%s' is not a mounted btrfs device\n",
 393                                 dev_path);
 394                 else
 395                         fprintf(stderr, "ERROR: can't access '%s': %s\n",
 396                                 dev_path, strerror(errno));
 397                 return 1;
 398         }
 399
 400         ret = get_fs_info(dev_path, &fi_args, &di_args);
 401         if (ret) {
 402                 fprintf(stderr, "ERROR: getting dev info for devstats failed: "
 403                                 "%s\n", strerror(-ret));
 404                 err = 1;
 405                 goto out;
 406         }
 407         if (!fi_args.num_devices) {
 408                 fprintf(stderr, "ERROR: no devices found\n");
 409                 err = 1;
 410                 goto out;
 411         }
 412
 413         for (i = 0; i < fi_args.num_devices; i++) {
 414                 struct btrfs_ioctl_get_dev_stats args = {0};
 415                 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
 416
 417                 strncpy((char *)path, (char *)di_args[i].path,
 418                         BTRFS_DEVICE_PATH_NAME_MAX);
 419                 path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0';
 420
 421                 args.devid = di_args[i].devid;
 422                 args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
 423                 args.flags = flags;
 424
 425                 if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
 426                         fprintf(stderr,
 427                                 "ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
 428                                 path, strerror(errno));
 429                         err = 1;
 430                 } else {
 431                         char *canonical_path;
 432
 433                         canonical_path = canonicalize_path((char *)path);
 434
 435                         if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
 436                                 printf("[%s].write_io_errs   %llu\n",
 437                                        canonical_path,
 438                                        (unsigned long long) args.values[
 439                                         BTRFS_DEV_STAT_WRITE_ERRS]);
 440                         if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
 441                                 printf("[%s].read_io_errs    %llu\n",
 442                                        canonical_path,
 443                                        (unsigned long long) args.values[
 444                                         BTRFS_DEV_STAT_READ_ERRS]);
 445                         if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
 446                                 printf("[%s].flush_io_errs   %llu\n",
 447                                        canonical_path,
 448                                        (unsigned long long) args.values[
 449                                         BTRFS_DEV_STAT_FLUSH_ERRS]);
 450                         if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
 451                                 printf("[%s].corruption_errs %llu\n",
 452                                        canonical_path,
 453                                        (unsigned long long) args.values[
 454                                         BTRFS_DEV_STAT_CORRUPTION_ERRS]);
 455                         if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
 456                                 printf("[%s].generation_errs %llu\n",
 457                                        canonical_path,
 458                                        (unsigned long long) args.values[
 459                                         BTRFS_DEV_STAT_GENERATION_ERRS]);
 460
 461                         free(canonical_path);
 462                 }
 463         }
 464
 465 out:
 466         free(di_args);
 467         close_file_or_dir(fdmnt, dirstream);
 468
 469         return err;
 470 }
 471
 472 const char * const cmd_device_usage_usage[] = {
 473         "btrfs device usage [options] <path> [<path>..]",
 474         "Show detailed information about internal allocations in devices.",
 475         "-b|--raw           raw numbers in bytes",
 476         "-h|--human-readable",
 477         "                   human friendly numbers, base 1024 (default)",
 478         "-H                 human friendly numbers, base 1000",
 479         "--iec              use 1024 as a base (KiB, MiB, GiB, TiB)",
 480         "--si               use 1000 as a base (kB, MB, GB, TB)",
 481         "-k|--kbytes        show sizes in KiB, or kB with --si",
 482         "-m|--mbytes        show sizes in MiB, or MB with --si",
 483         "-g|--gbytes        show sizes in GiB, or GB with --si",
 484         "-t|--tbytes        show sizes in TiB, or TB with --si",
 485         NULL
 486 };
 487
 488 static int _cmd_device_usage(int fd, char *path, unsigned unit_mode)
 489 {
 490         int i;
 491         int ret = 0;
 492         struct chunk_info *chunkinfo = NULL;
 493         struct device_info *devinfo = NULL;
 494         int chunkcount = 0;
 495         int devcount = 0;
 496
 497         ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount, &devinfo,
 498                         &devcount);
 499         if (ret)
 500                 goto out;
 501
 502         for (i = 0; i < devcount; i++) {
 503                 printf("%s, ID: %llu\n", devinfo[i].path, devinfo[i].devid);
 504                 print_device_sizes(fd, &devinfo[i], unit_mode);
 505                 print_device_chunks(fd, &devinfo[i], chunkinfo, chunkcount,
 506                                 unit_mode);
 507                 printf("\n");
 508         }
 509
 510 out:
 511         free(devinfo);
 512         free(chunkinfo);
 513
 514         return ret;
 515 }
 516
 517 int cmd_device_usage(int argc, char **argv)
 518 {
 519         unsigned unit_mode = UNITS_DEFAULT;
 520         int ret = 0;
 521         int     i, more_than_one = 0;
 522
 523         optind = 1;
 524         while (1) {
 525                 int c;
 526                 static const struct option long_options[] = {
 527                         { "raw", no_argument, NULL, 'b'},
 528                         { "kbytes", no_argument, NULL, 'k'},
 529                         { "mbytes", no_argument, NULL, 'm'},
 530                         { "gbytes", no_argument, NULL, 'g'},
 531                         { "tbytes", no_argument, NULL, 't'},
 532                         { "si", no_argument, NULL, GETOPT_VAL_SI},
 533                         { "iec", no_argument, NULL, GETOPT_VAL_IEC},
 534                         { "human-readable", no_argument, NULL,
 535                                 GETOPT_VAL_HUMAN_READABLE},
 536                         { NULL, 0, NULL, 0 }
 537                 };
 538
 539                 c = getopt_long(argc, argv, "bhHkmgt", long_options, NULL);
 540                 if (c < 0)
 541                         break;
 542                 switch (c) {
 543                 case 'b':
 544                         unit_mode = UNITS_RAW;
 545                         break;
 546                 case 'k':
 547                         units_set_base(&unit_mode, UNITS_KBYTES);
 548                         break;
 549                 case 'm':
 550                         units_set_base(&unit_mode, UNITS_MBYTES);
 551                         break;
 552                 case 'g':
 553                         units_set_base(&unit_mode, UNITS_GBYTES);
 554                         break;
 555                 case 't':
 556                         units_set_base(&unit_mode, UNITS_TBYTES);
 557                         break;
 558                 case GETOPT_VAL_HUMAN_READABLE:
 559                 case 'h':
 560                         unit_mode = UNITS_HUMAN_BINARY;
 561                         break;
 562                 case 'H':
 563                         unit_mode = UNITS_HUMAN_DECIMAL;
 564                         break;
 565                 case GETOPT_VAL_SI:
 566                         units_set_mode(&unit_mode, UNITS_DECIMAL);
 567                         break;
 568                 case GETOPT_VAL_IEC:
 569                         units_set_mode(&unit_mode, UNITS_BINARY);
 570                         break;
 571                 default:
 572                         usage(cmd_device_usage_usage);
 573                 }
 574         }
 575
 576         if (check_argc_min(argc - optind, 1))
 577                 usage(cmd_device_usage_usage);
 578
 579         for (i = optind; i < argc ; i++) {
 580                 int fd;
 581                 DIR     *dirstream = NULL;
 582                 if (more_than_one)
 583                         printf("\n");
 584
 585                 fd = open_file_or_dir(argv[i], &dirstream);
 586                 if (fd < 0) {
 587                         fprintf(stderr, "ERROR: can't access '%s'\n",
 588                                 argv[1]);
 589                         ret = 1;
 590                         goto out;
 591                 }
 592
 593                 ret = _cmd_device_usage(fd, argv[i], unit_mode);
 594                 close_file_or_dir(fd, dirstream);
 595
 596                 if (ret)
 597                         goto out;
 598                 more_than_one = 1;
 599         }
 600 out:
 601         return !!ret;
 602 }
 603
 604 static const char device_cmd_group_info[] =
 605 "manage and query devices in the filesystem";
 606
 607 const struct cmd_group device_cmd_group = {
 608         device_cmd_group_usage, device_cmd_group_info, {
 609                 { "add", cmd_device_add, cmd_device_add_usage, NULL, 0 },
 610                 { "delete", cmd_device_delete, cmd_device_delete_usage, NULL,
 611                         CMD_ALIAS },
 612                 { "remove", cmd_device_remove, cmd_device_remove_usage, NULL, 0 },
 613                 { "scan", cmd_device_scan, cmd_device_scan_usage, NULL, 0 },
 614                 { "ready", cmd_device_ready, cmd_device_ready_usage, NULL, 0 },
 615                 { "stats", cmd_device_stats, cmd_device_stats_usage, NULL, 0 },
 616                 { "usage", cmd_device_usage,
 617                         cmd_device_usage_usage, NULL, 0 },
 618                 NULL_CMD_STRUCT
 619         }
 620 };
 621
 622 int cmd_device(int argc, char **argv)
 623 {
 624         return handle_command_group(&device_cmd_group, argc, argv);
 625 }