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