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         btrfs_close_all_devices();
 142         return !!ret;
 143 }
 144
 145 static int _cmd_device_remove(int argc, char **argv,
 146                 const char * const *usagestr)
 147 {
 148         char    *mntpnt;
 149         int     i, fdmnt, ret=0, e;
 150         DIR     *dirstream = NULL;
 151
 152         if (check_argc_min(argc, 3))
 153                 usage(usagestr);
 154
 155         mntpnt = argv[argc - 1];
 156
 157         fdmnt = btrfs_open_dir(mntpnt, &dirstream, 1);
 158         if (fdmnt < 0)
 159                 return 1;
 160
 161         for(i=1 ; i < argc - 1; i++ ){
 162                 struct  btrfs_ioctl_vol_args arg;
 163                 int     res;
 164
 165                 if (is_block_device(argv[i]) != 1) {
 166                         fprintf(stderr,
 167                                 "ERROR: %s is not a block device\n", argv[i]);
 168                         ret++;
 169                         continue;
 170                 }
 171                 memset(&arg, 0, sizeof(arg));
 172                 strncpy_null(arg.name, argv[i]);
 173                 res = ioctl(fdmnt, BTRFS_IOC_RM_DEV, &arg);
 174                 e = errno;
 175                 if (res) {
 176                         const char *msg;
 177
 178                         if (res > 0)
 179                                 msg = btrfs_err_str(res);
 180                         else
 181                                 msg = strerror(e);
 182                         fprintf(stderr,
 183                                 "ERROR: error removing the device '%s' - %s\n",
 184                                 argv[i], msg);
 185                         ret++;
 186                 }
 187         }
 188
 189         close_file_or_dir(fdmnt, dirstream);
 190         return !!ret;
 191 }
 192
 193 static const char * const cmd_device_remove_usage[] = {
 194         "btrfs device remove <device> [<device>...] <path>",
 195         "Remove a device from a filesystem",
 196         NULL
 197 };
 198
 199 static int cmd_device_remove(int argc, char **argv)
 200 {
 201         return _cmd_device_remove(argc, argv, cmd_device_remove_usage);
 202 }
 203
 204 static const char * const cmd_device_delete_usage[] = {
 205         "btrfs device delete <device> [<device>...] <path>",
 206         "Remove a device from a filesystem",
 207         NULL
 208 };
 209
 210 static int cmd_device_delete(int argc, char **argv)
 211 {
 212         return _cmd_device_remove(argc, argv, cmd_device_delete_usage);
 213 }
 214
 215 static const char * const cmd_device_scan_usage[] = {
 216         "btrfs device scan [(-d|--all-devices)|<device> [<device>...]]",
 217         "Scan devices for a btrfs filesystem",
 218         " -d|--all-devices (deprecated)",
 219         NULL
 220 };
 221
 222 static int cmd_device_scan(int argc, char **argv)
 223 {
 224         int i;
 225         int devstart = 1;
 226         int all = 0;
 227         int ret = 0;
 228
 229         optind = 1;
 230         while (1) {
 231                 int c;
 232                 static const struct option long_options[] = {
 233                         { "all-devices", no_argument, NULL, 'd'},
 234                         { NULL, 0, NULL, 0}
 235                 };
 236
 237                 c = getopt_long(argc, argv, "d", long_options, NULL);
 238                 if (c < 0)
 239                         break;
 240                 switch (c) {
 241                 case 'd':
 242                         all = 1;
 243                         break;
 244                 default:
 245                         usage(cmd_device_scan_usage);
 246                 }
 247         }
 248
 249         if (all && check_argc_max(argc, 2))
 250                 usage(cmd_device_scan_usage);
 251
 252         if (all || argc == 1) {
 253                 printf("Scanning for Btrfs filesystems\n");
 254                 ret = btrfs_scan_lblkid();
 255                 if (ret)
 256                         fprintf(stderr, "ERROR: error %d while scanning\n", ret);
 257                 ret = btrfs_register_all_devices();
 258                 if (ret)
 259                         fprintf(stderr, "ERROR: error %d while registering\n", ret);
 260                 goto out;
 261         }
 262
 263         for( i = devstart ; i < argc ; i++ ){
 264                 char *path;
 265
 266                 if (is_block_device(argv[i]) != 1) {
 267                         fprintf(stderr,
 268                                 "ERROR: %s is not a block device\n", argv[i]);
 269                         ret = 1;
 270                         goto out;
 271                 }
 272                 path = canonicalize_path(argv[i]);
 273                 if (!path) {
 274                         fprintf(stderr,
 275                                 "ERROR: Could not canonicalize path '%s': %s\n",
 276                                 argv[i], strerror(errno));
 277                         ret = 1;
 278                         goto out;
 279                 }
 280                 printf("Scanning for Btrfs filesystems in '%s'\n", path);
 281                 if (btrfs_register_one_device(path) != 0) {
 282                         ret = 1;
 283                         free(path);
 284                         goto out;
 285                 }
 286                 free(path);
 287         }
 288
 289 out:
 290         btrfs_close_all_devices();
 291         return !!ret;
 292 }
 293
 294 static const char * const cmd_device_ready_usage[] = {
 295         "btrfs device ready <device>",
 296         "Check device to see if it has all of its devices in cache for mounting",
 297         NULL
 298 };
 299
 300 static int cmd_device_ready(int argc, char **argv)
 301 {
 302         struct  btrfs_ioctl_vol_args args;
 303         int     fd;
 304         int     ret;
 305         char    *path;
 306
 307         if (check_argc_min(argc, 2))
 308                 usage(cmd_device_ready_usage);
 309
 310         fd = open("/dev/btrfs-control", O_RDWR);
 311         if (fd < 0) {
 312                 perror("failed to open /dev/btrfs-control");
 313                 return 1;
 314         }
 315
 316         path = canonicalize_path(argv[argc - 1]);
 317         if (!path) {
 318                 fprintf(stderr,
 319                         "ERROR: Could not canonicalize pathname '%s': %s\n",
 320                         argv[argc - 1], strerror(errno));
 321                 ret = 1;
 322                 goto out;
 323         }
 324
 325         if (is_block_device(path) != 1) {
 326                 fprintf(stderr,
 327                         "ERROR: %s is not a block device\n", path);
 328                 ret = 1;
 329                 goto out;
 330         }
 331
 332         memset(&args, 0, sizeof(args));
 333         strncpy_null(args.name, path);
 334         ret = ioctl(fd, BTRFS_IOC_DEVICES_READY, &args);
 335         if (ret < 0) {
 336                 fprintf(stderr, "ERROR: unable to determine if the device '%s'"
 337                         " is ready for mounting - %s\n", path,
 338                         strerror(errno));
 339                 ret = 1;
 340         }
 341
 342 out:
 343         free(path);
 344         close(fd);
 345         return ret;
 346 }
 347
 348 static const char * const cmd_device_stats_usage[] = {
 349         "btrfs device stats [-z] <path>|<device>",
 350         "Show current device IO stats.",
 351         "",
 352         "-z                     show current stats and reset values to zero",
 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, 1);
 388         if (fdmnt < 0)
 389                 return 1;
 390
 391         ret = get_fs_info(dev_path, &fi_args, &di_args);
 392         if (ret) {
 393                 fprintf(stderr, "ERROR: getting dev info for devstats failed: "
 394                                 "%s\n", strerror(-ret));
 395                 err = 1;
 396                 goto out;
 397         }
 398         if (!fi_args.num_devices) {
 399                 fprintf(stderr, "ERROR: no devices found\n");
 400                 err = 1;
 401                 goto out;
 402         }
 403
 404         for (i = 0; i < fi_args.num_devices; i++) {
 405                 struct btrfs_ioctl_get_dev_stats args = {0};
 406                 __u8 path[BTRFS_DEVICE_PATH_NAME_MAX + 1];
 407
 408                 strncpy((char *)path, (char *)di_args[i].path,
 409                         BTRFS_DEVICE_PATH_NAME_MAX);
 410                 path[BTRFS_DEVICE_PATH_NAME_MAX] = '\0';
 411
 412                 args.devid = di_args[i].devid;
 413                 args.nr_items = BTRFS_DEV_STAT_VALUES_MAX;
 414                 args.flags = flags;
 415
 416                 if (ioctl(fdmnt, BTRFS_IOC_GET_DEV_STATS, &args) < 0) {
 417                         fprintf(stderr,
 418                                 "ERROR: ioctl(BTRFS_IOC_GET_DEV_STATS) on %s failed: %s\n",
 419                                 path, strerror(errno));
 420                         err = 1;
 421                 } else {
 422                         char *canonical_path;
 423
 424                         canonical_path = canonicalize_path((char *)path);
 425
 426                         if (args.nr_items >= BTRFS_DEV_STAT_WRITE_ERRS + 1)
 427                                 printf("[%s].write_io_errs   %llu\n",
 428                                        canonical_path,
 429                                        (unsigned long long) args.values[
 430                                         BTRFS_DEV_STAT_WRITE_ERRS]);
 431                         if (args.nr_items >= BTRFS_DEV_STAT_READ_ERRS + 1)
 432                                 printf("[%s].read_io_errs    %llu\n",
 433                                        canonical_path,
 434                                        (unsigned long long) args.values[
 435                                         BTRFS_DEV_STAT_READ_ERRS]);
 436                         if (args.nr_items >= BTRFS_DEV_STAT_FLUSH_ERRS + 1)
 437                                 printf("[%s].flush_io_errs   %llu\n",
 438                                        canonical_path,
 439                                        (unsigned long long) args.values[
 440                                         BTRFS_DEV_STAT_FLUSH_ERRS]);
 441                         if (args.nr_items >= BTRFS_DEV_STAT_CORRUPTION_ERRS + 1)
 442                                 printf("[%s].corruption_errs %llu\n",
 443                                        canonical_path,
 444                                        (unsigned long long) args.values[
 445                                         BTRFS_DEV_STAT_CORRUPTION_ERRS]);
 446                         if (args.nr_items >= BTRFS_DEV_STAT_GENERATION_ERRS + 1)
 447                                 printf("[%s].generation_errs %llu\n",
 448                                        canonical_path,
 449                                        (unsigned long long) args.values[
 450                                         BTRFS_DEV_STAT_GENERATION_ERRS]);
 451
 452                         free(canonical_path);
 453                 }
 454         }
 455
 456 out:
 457         free(di_args);
 458         close_file_or_dir(fdmnt, dirstream);
 459         btrfs_close_all_devices();
 460
 461         return err;
 462 }
 463
 464 static const char * const cmd_device_usage_usage[] = {
 465         "btrfs device usage [options] <path> [<path>..]",
 466         "Show detailed information about internal allocations in devices.",
 467         HELPINFO_OUTPUT_UNIT_DF,
 468         NULL
 469 };
 470
 471 static int _cmd_device_usage(int fd, char *path, unsigned unit_mode)
 472 {
 473         int i;
 474         int ret = 0;
 475         struct chunk_info *chunkinfo = NULL;
 476         struct device_info *devinfo = NULL;
 477         int chunkcount = 0;
 478         int devcount = 0;
 479
 480         ret = load_chunk_and_device_info(fd, &chunkinfo, &chunkcount, &devinfo,
 481                         &devcount);
 482         if (ret)
 483                 goto out;
 484
 485         for (i = 0; i < devcount; i++) {
 486                 printf("%s, ID: %llu\n", devinfo[i].path, devinfo[i].devid);
 487                 print_device_sizes(fd, &devinfo[i], unit_mode);
 488                 print_device_chunks(fd, &devinfo[i], chunkinfo, chunkcount,
 489                                 unit_mode);
 490                 printf("\n");
 491         }
 492
 493 out:
 494         free(devinfo);
 495         free(chunkinfo);
 496
 497         return ret;
 498 }
 499
 500 static int cmd_device_usage(int argc, char **argv)
 501 {
 502         unsigned unit_mode;
 503         int ret = 0;
 504         int more_than_one = 0;
 505         int i;
 506
 507         unit_mode = get_unit_mode_from_arg(&argc, argv, 1);
 508
 509         if (check_argc_min(argc, 2) || argv[1][0] == '-')
 510                 usage(cmd_device_usage_usage);
 511
 512         for (i = 1; i < argc; i++) {
 513                 int fd;
 514                 DIR *dirstream = NULL;
 515
 516                 if (more_than_one)
 517                         printf("\n");
 518
 519                 fd = btrfs_open_dir(argv[i], &dirstream, 1);
 520                 if (fd < 0) {
 521                         ret = 1;
 522                         goto out;
 523                 }
 524
 525                 ret = _cmd_device_usage(fd, argv[i], unit_mode);
 526                 close_file_or_dir(fd, dirstream);
 527
 528                 if (ret)
 529                         goto out;
 530                 more_than_one = 1;
 531         }
 532 out:
 533         return !!ret;
 534 }
 535
 536 static const char device_cmd_group_info[] =
 537 "manage and query devices in the filesystem";
 538
 539 const struct cmd_group device_cmd_group = {
 540         device_cmd_group_usage, device_cmd_group_info, {
 541                 { "add", cmd_device_add, cmd_device_add_usage, NULL, 0 },
 542                 { "delete", cmd_device_delete, cmd_device_delete_usage, NULL,
 543                         CMD_ALIAS },
 544                 { "remove", cmd_device_remove, cmd_device_remove_usage, NULL, 0 },
 545                 { "scan", cmd_device_scan, cmd_device_scan_usage, NULL, 0 },
 546                 { "ready", cmd_device_ready, cmd_device_ready_usage, NULL, 0 },
 547                 { "stats", cmd_device_stats, cmd_device_stats_usage, NULL, 0 },
 548                 { "usage", cmd_device_usage,
 549                         cmd_device_usage_usage, NULL, 0 },
 550                 NULL_CMD_STRUCT
 551         }
 552 };
 553
 554 int cmd_device(int argc, char **argv)
 555 {
 556         return handle_command_group(&device_cmd_group, argc, argv);
 557 }