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 "volumes.h"
  32 #include "cmds-fi-usage.h"
  33
  34 #include "commands.h"
  35
  36 static const char * const device_cmd_group_usage[] = {
  37         "btrfs device <command> [<args>]",
  38         NULL
  39 };
  40
  41 static const char * const cmd_device_add_usage[] = {
  42         "btrfs device add [options] <device> [<device>...] <path>",
  43         "Add a device to a filesystem",
  44         "-K|--nodiscard    do not perform whole device TRIM",
  45         "-f|--force        force overwrite existing filesystem on the disk",
  46         NULL
  47 };
  48
  49 static int cmd_device_add(int argc, char **argv)
  50 {
  51         char    *mntpnt;
  52         int     i, fdmnt, ret=0, e;
  53         DIR     *dirstream = NULL;
  54         int discard = 1;
  55         int force = 0;
  56         int last_dev;
  57
  58         while (1) {
  59                 int c;
  60                 static const struct option long_options[] = {
  61                         { "nodiscard", optional_argument, NULL, 'K'},
  62                         { "force", no_argument, NULL, 'f'},
  63                         { NULL, 0, NULL, 0}
  64                 };
  65
  66                 c = getopt_long(argc, argv, "Kf", long_options, NULL);
  67                 if (c < 0)
  68                         break;
  69                 switch (c) {
  70                 case 'K':
  71                         discard = 0;
  72                         break;
  73                 case 'f':
  74                         force = 1;
  75                         break;
  76                 default:
  77                         usage(cmd_device_add_usage);
  78                 }
  79         }
  80
  81         if (check_argc_min(argc - optind, 2))
  82                 usage(cmd_device_add_usage);
  83
  84         last_dev = argc - 1;
  85         mntpnt = argv[last_dev];
  86
  87         fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
  88         if (fdmnt < 0)
  89                 return 1;
  90
  91         for (i = optind; i < last_dev; i++){
  92                 struct btrfs_ioctl_vol_args ioctl_args;
  93                 int     devfd, res;
  94                 u64 dev_block_count = 0;
  95                 char *path;
  96
  97                 res = test_dev_for_mkfs(argv[i], force);
  98                 if (res) {
  99                         ret++;
 100                         continue;
 101                 }
 102
 103                 devfd = open(argv[i], O_RDWR);
 104                 if (devfd < 0) {
 105                         fprintf(stderr, "ERROR: Unable to open device '%s'\n", argv[i]);
 106                         ret++;
 107                         continue;
 108                 }
 109
 110                 res = btrfs_prepare_device(devfd, argv[i], 1, &dev_block_count,
 111                                            0, discard);
 112                 close(devfd);
 113                 if (res) {
 114                         ret++;
 115                         goto error_out;
 116                 }
 117
 118                 path = canonicalize_path(argv[i]);
 119                 if (!path) {
 120                         fprintf(stderr,
 121                                 "ERROR: Could not canonicalize pathname '%s': %s\n",
 122                                 argv[i], strerror(errno));
 123                         ret++;
 124                         goto error_out;
 125                 }
 126
 127                 memset(&ioctl_args, 0, sizeof(ioctl_args));
 128                 strncpy_null(ioctl_args.name, path);
 129                 res = ioctl(fdmnt, BTRFS_IOC_ADD_DEV, &ioctl_args);
 130                 e = errno;
 131                 if (res < 0) {
 132                         fprintf(stderr, "ERROR: error adding the device '%s' - %s\n",
 133                                 path, strerror(e));
 134                         ret++;
 135                 }
 136                 free(path);
 137         }
 138
 139 error_out:
 140         close_file_or_dir(fdmnt, dirstream);
 141         return !!ret;
 142 }
 143
 144 static int _cmd_device_remove(int argc, char **argv,
 145                 const char * const *usagestr)
 146 {
 147         char    *mntpnt;
 148         int     i, fdmnt, ret=0, e;
 149         DIR     *dirstream = NULL;
 150
 151         if (check_argc_min(argc, 3))
 152                 usage(usagestr);
 153
 154         mntpnt = argv[argc - 1];
 155
 156         fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
 157         if (fdmnt < 0)
 158                 return 1;
 159
 160         for(i=1 ; i < argc - 1; i++ ){
 161                 struct  btrfs_ioctl_vol_args arg;
 162                 int     res;
 163
 164                 if (is_block_device(argv[i]) != 1) {
 165                         fprintf(stderr,
 166                                 "ERROR: %s is not a block device\n", argv[i]);
 167                         ret++;
 168                         continue;
 169                 }
 170                 memset(&arg, 0, sizeof(arg));
 171                 strncpy_null(arg.name, argv[i]);
 172                 res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
 173                 e = errno;
 174                 if (res) {
 175                         const char *msg;
 176
 177                         if (res > 0)
 178                                 msg = btrfs_err_str(res);
 179                         else
 180                                 msg = strerror(e);
 181                         fprintf(stderr,
 182                                 "ERROR: error removing the device '%s' - %s\n",
 183                                 argv[i], msg);
 184                         ret++;
 185                 }
 186         }
 187
 188         close_file_or_dir(fdmnt, dirstream);
 189         return !!ret;
 190 }
 191
 192 static const char * const cmd_device_remove_usage[] = {
 193         "btrfs device remove <device> [<device>...] <path>",
 194         "Remove a device from a filesystem",
 195         NULL
 196 };
 197
 198 static int cmd_device_remove(int argc, char **argv)
 199 {
 200         return _cmd_device_remove(argc, argv, cmd_device_remove_usage);
 201 }
 202
 203 static const char * const cmd_device_delete_usage[] = {
 204         "btrfs device delete <device> [<device>...] <path>",
 205         "Remove a device from a filesystem",
 206         NULL
 207 };
 208
 209 static int cmd_device_delete(int argc, char **argv)
 210 {
 211         return _cmd_device_remove(argc, argv, cmd_device_delete_usage);
 212 }
 213
 214 static const char * const cmd_device_scan_usage[] = {
 215         "btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
 216         "Scan devices for a btrfs filesystem",
 217         " -d|--all-devices (deprecated)",
 218         NULL
 219 };
 220
 221 static int cmd_device_scan(int argc, char **argv)
 222 {
 223         int i;
 224         int devstart = 1;
 225         int all = 0;
 226         int ret = 0;
 227
 228         optind = 1;
 229         while (1) {
 230                 int c;
 231                 static const struct option long_options[] = {
 232                         { "all-devices", no_argument, NULL, 'd'},
 233                         { NULL, 0, NULL, 0}
 234                 };
 235
 236                 c = getopt_long(argc, argv, "d", long_options, NULL);
 237                 if (c < 0)
 238                         break;
 239                 switch (c) {
 240                 case 'd':
 241                         all = 1;
 242                         break;
 243                 default:
 244                         usage(cmd_device_scan_usage);
 245                 }
 246         }
 247
 248         if (all && check_argc_max(argc, 2))
 249                 usage(cmd_device_scan_usage);
 250
 251         if (all || argc == 1) {
 252                 printf("Scanning for Btrfs filesystems\n");
 253                 ret = btrfs_scan_lblkid();
 254                 if (ret)
 255                         fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 256                 ret = btrfs_register_all_devices();
 257                 if (ret)
 258                         fprintf(stderr, "ERROR: error %d while registering\n", ret);
 259                 goto out;
 260         }
 261
 262         for( i = devstart ; i < argc ; i++ ){
 263                 char *path;
 264
 265                 if (is_block_device(argv[i]) != 1) {
 266                         fprintf(stderr,
 267                                 "ERROR: %s is not a block device\n", argv[i]);
 268                         ret = 1;
 269                         goto out;
 270                 }
 271                 path = canonicalize_path(argv[i]);
 272                 if (!path) {
 273                         fprintf(stderr,
 274                                 "ERROR: Could not canonicalize path '%s': %s\n",
 275                                 argv[i], strerror(errno));
 276                         ret = 1;
 277                         goto out;
 278                 }
 279                 printf("Scanning for Btrfs filesystems in '%s'\n", path);
 280                 if (btrfs_register_one_device(path) != 0) {
 281                         ret = 1;
 282                         free(path);
 283                         goto out;
 284                 }
 285                 free(path);
 286         }
 287
 288 out:
 289         return !!ret;
 290 }
 291
 292 static const char * const cmd_device_ready_usage[] = {
 293         "btrfs device ready <device>",
 294         "Check device to see if it has all of its devices in cache for mounting",
 295         NULL
 296 };
 297
 298 static int cmd_device_ready(int argc, char **argv)
 299 {
 300         struct  btrfs_ioctl_vol_args args;
 301         int     fd;
 302         int     ret;
 303         char    *path;
 304
 305         if (check_argc_min(argc, 2))
 306                 usage(cmd_device_ready_usage);
 307
 308         fd = open("/dev/btrfs-control", O_RDWR);
 309         if (fd < 0) {
 310                 perror("failed to open /dev/btrfs-control");
 311                 return 1;
 312         }
 313
 314         path = canonicalize_path(argv[argc - 1]);
 315         if (!path) {
 316                 fprintf(stderr,
 317                         "ERROR: Could not canonicalize pathname '%s': %s\n",
 318                         argv[argc - 1], strerror(errno));
 319                 ret = 1;
 320                 goto out;
 321         }
 322
 323         if (is_block_device(path) != 1) {
 324                 fprintf(stderr,
 325                         "ERROR: %s is not a block device\n", path);
 326                 ret = 1;
 327                 goto out;
 328         }
 329
 330         memset(&args, 0, sizeof(args));
 331         strncpy_null(args.name, path);
 332         ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
 333         if (ret < 0) {
 334                 fprintf(stderr, "ERROR: unable to determine if the device '%s'"
 335                         " is ready for mounting - %s\n", path,
 336                         strerror(errno));
 337                 ret = 1;
 338         }
 339
 340 out:
 341         free(path);
 342         close(fd);
 343         return ret;
 344 }
 345
 346 static const char * const cmd_device_stats_usage[] = {
 347         "btrfs device stats [-z] <path>|<device>",
 348         "Show current device IO stats.",
 349         "",
 350         "-z                     show current stats and reset values to zero",
 351         NULL
 352 };
 353
 354 static int cmd_device_stats(int argc, char **argv)
 355 {
 356         char *dev_path;
 357         struct btrfs_ioctl_fs_info_args fi_args;
 358         struct btrfs_ioctl_dev_info_args *di_args = NULL;
 359         int ret;
 360         int fdmnt;
 361         int i;
 362         int c;
 363         int err = 0;
 364         __u64 flags = 0;
 365         DIR *dirstream = NULL;
 366
 367         optind = 1;
 368         while ((c = getopt(argc, argv, "z")) != -1) {
 369                 switch (c) {
 370                 case 'z':
 371                         flags = BTRFS_DEV_STATS_RESET;
 372                         break;
 373                 case '?':
 374                 default:
 375                         usage(cmd_device_stats_usage);
 376                 }
 377         }
 378
 379         argc = argc - optind;
 380         if (check_argc_exact(argc, 1))
 381                 usage(cmd_device_stats_usage);
 382
 383         dev_path = argv[optind];
 384
 385         fdmnt = open_path_or_dev_mnt(dev_path, &dirstream, 1);
 386         if (fdmnt < 0)
 387                 return 1;
 388
 389         ret = get_fs_info(dev_path, &fi_args, &di_args);
 390         if (ret) {
 391                 fprintf(stderr, "ERROR: getting dev info for devstats failed: "
 392                                 "%s\n", strerror(-ret));
 393                 err = 1;
 394                 goto out;
 395         }
 396         if (!fi_args.num_devices) {
 397                 fprintf(stderr, "ERROR: no devices found\n");
 398                 err = 1;
 399                 goto out;
 400         }
 401
 402         for (i = 0; i < fi_args.num_devices; i++) {
 403                 struct btrfs_ioctl_get_dev_stats args = {0};
 404                 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
 405
 406                 strncpy((char *)path, (char *)di_args[i].path,
 407                         BTRFS_DEVICE_PATH_NAME_MAX);
 408                 path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0';
 409
 410                 args.devid = di_args[i].devid;
 411                 args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
 412                 args.flags = flags;
 413
 414                 if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
 415                         fprintf(stderr,
 416                                 "ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
 417                                 path, strerror(errno));
 418                         err = 1;
 419                 } else {
 420                         char *canonical_path;
 421
 422                         canonical_path = canonicalize_path((char *)path);
 423
 424                         if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
 425                                 printf("[%s].write_io_errs   %llu\n",
 426                                        canonical_path,
 427                                        (unsigned long long) args.values[
 428                                         BTRFS_DEV_STAT_WRITE_ERRS]);
 429                         if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
 430                                 printf("[%s].read_io_errs    %llu\n",
 431                                        canonical_path,
 432                                        (unsigned long long) args.values[
 433                                         BTRFS_DEV_STAT_READ_ERRS]);
 434                         if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
 435                                 printf("[%s].flush_io_errs   %llu\n",
 436                                        canonical_path,
 437                                        (unsigned long long) args.values[
 438                                         BTRFS_DEV_STAT_FLUSH_ERRS]);
 439                         if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
 440                                 printf("[%s].corruption_errs %llu\n",
 441                                        canonical_path,
 442                                        (unsigned long long) args.values[
 443                                         BTRFS_DEV_STAT_CORRUPTION_ERRS]);
 444                         if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
 445                                 printf("[%s].generation_errs %llu\n",
 446                                        canonical_path,
 447                                        (unsigned long long) args.values[
 448                                         BTRFS_DEV_STAT_GENERATION_ERRS]);
 449
 450                         free(canonical_path);
 451                 }
 452         }
 453
 454 out:
 455         free(di_args);
 456         close_file_or_dir(fdmnt, dirstream);
 457
 458         return err;
 459 }
 460
 461 static const char * const cmd_device_usage_usage[] = {
 462         "btrfs device usage [options] <path> [<path>..]",
 463         "Show detailed information about internal allocations in devices.",
 464         HELPINFO_OUTPUT_UNIT_DF,
 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 static int cmd_device_usage(int argc, char **argv)
 498 {
 499         unsigned unit_mode;
 500         int ret = 0;
 501         int more_than_one = 0;
 502         int i;
 503
 504         unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 505
 506         if (check_argc_min(argc, 2) || argv[1][0] == '-')
 507                 usage(cmd_device_usage_usage);
 508
 509         for (i = 1; i < argc; i++) {
 510                 int fd;
 511                 DIR *dirstream = NULL;
 512
 513                 if (more_than_one)
 514                         printf("\n");
 515
 516                 fd = btrfs_open_dir(argv[i], &dirstream, 1);
 517                 if (fd < 0) {
 518                         ret = 1;
 519                         goto out;
 520                 }
 521
 522                 ret = _cmd_device_usage(fd, argv[i], unit_mode);
 523                 close_file_or_dir(fd, dirstream);
 524
 525                 if (ret)
 526                         goto out;
 527                 more_than_one = 1;
 528         }
 529 out:
 530         return !!ret;
 531 }
 532
 533 static const char device_cmd_group_info[] =
 534 "manage and query devices in the filesystem";
 535
 536 const struct cmd_group device_cmd_group = {
 537         device_cmd_group_usage, device_cmd_group_info, {
 538                 { "add", cmd_device_add, cmd_device_add_usage, NULL, 0 },
 539                 { "delete", cmd_device_delete, cmd_device_delete_usage, NULL,
 540                         CMD_ALIAS },
 541                 { "remove", cmd_device_remove, cmd_device_remove_usage, NULL, 0 },
 542                 { "scan", cmd_device_scan, cmd_device_scan_usage, NULL, 0 },
 543                 { "ready", cmd_device_ready, cmd_device_ready_usage, NULL, 0 },
 544                 { "stats", cmd_device_stats, cmd_device_stats_usage, NULL, 0 },
 545                 { "usage", cmd_device_usage,
 546                         cmd_device_usage_usage, NULL, 0 },
 547                 NULL_CMD_STRUCT
 548         }
 549 };
 550
 551 int cmd_device(int argc, char **argv)
 552 {
 553         return handle_command_group(&device_cmd_group, argc, argv);
 554 }