cmds-qgroup.c

   1 /*
   2  * Copyright (C) 2012 STRATO.  All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public
   6  * License v2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public
  14  * License along with this program; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 021110-1307, USA.
  17  */
  18
  19 #include <sys/ioctl.h>
  20 #include <unistd.h>
  21 #include <getopt.h>
  22
  23 #include "ctree.h"
  24 #include "ioctl.h"
  25
  26 #include "commands.h"
  27 #include "qgroup.h"
  28 #include "utils.h"
  29
  30 static const char * const qgroup_cmd_group_usage[] = {
  31         "btrfs qgroup <command> [options] <path>",
  32         NULL
  33 };
  34
  35 static int qgroup_assign(int assign, int argc, char **argv)
  36 {
  37         int ret = 0;
  38         int fd;
  39         int e;
  40         char *path = argv[3];
  41         struct btrfs_ioctl_qgroup_assign_args args;
  42         DIR *dirstream = NULL;
  43
  44         if (check_argc_exact(argc, 4))
  45                 return -1;
  46
  47         memset(&args, 0, sizeof(args));
  48         args.assign = assign;
  49         args.src = parse_qgroupid(argv[1]);
  50         args.dst = parse_qgroupid(argv[2]);
  51
  52         /*
  53          * FIXME src should accept subvol path
  54          */
  55         if (btrfs_qgroup_level(args.src) >= btrfs_qgroup_level(args.dst)) {
  56                 fprintf(stderr, "ERROR: bad relation requested '%s'\n", path);
  57                 return 1;
  58         }
  59         fd = open_file_or_dir(path, &dirstream);
  60         if (fd < 0) {
  61                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
  62                 return 1;
  63         }
  64
  65         ret = ioctl(fd, BTRFS_IOC_QGROUP_ASSIGN, &args);
  66         e = errno;
  67         close_file_or_dir(fd, dirstream);
  68         if (ret < 0) {
  69                 fprintf(stderr, "ERROR: unable to assign quota group: %s\n",
  70                         strerror(e));
  71                 return 1;
  72         }
  73         return 0;
  74 }
  75
  76 static int qgroup_create(int create, int argc, char **argv)
  77 {
  78         int ret = 0;
  79         int fd;
  80         int e;
  81         char *path = argv[2];
  82         struct btrfs_ioctl_qgroup_create_args args;
  83         DIR *dirstream = NULL;
  84
  85         if (check_argc_exact(argc, 3))
  86                 return -1;
  87
  88         memset(&args, 0, sizeof(args));
  89         args.create = create;
  90         args.qgroupid = parse_qgroupid(argv[1]);
  91
  92         fd = open_file_or_dir(path, &dirstream);
  93         if (fd < 0) {
  94                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
  95                 return 1;
  96         }
  97
  98         ret = ioctl(fd, BTRFS_IOC_QGROUP_CREATE, &args);
  99         e = errno;
 100         close_file_or_dir(fd, dirstream);
 101         if (ret < 0) {
 102                 fprintf(stderr, "ERROR: unable to %s quota group: %s\n",
 103                         create ? "create":"destroy", strerror(e));
 104                 return 1;
 105         }
 106         return 0;
 107 }
 108
 109 static int parse_limit(const char *p, unsigned long long *s)
 110 {
 111         char *endptr;
 112         unsigned long long size;
 113
 114         if (strcasecmp(p, "none") == 0) {
 115                 *s = 0;
 116                 return 1;
 117         }
 118         size = strtoull(p, &endptr, 10);
 119         switch (*endptr) {
 120         case 'T':
 121         case 't':
 122                 size *= 1024;
 123                 /* fallthrough */
 124         case 'G':
 125         case 'g':
 126                 size *= 1024;
 127                 /* fallthrough */
 128         case 'M':
 129         case 'm':
 130                 size *= 1024;
 131                 /* fallthrough */
 132         case 'K':
 133         case 'k':
 134                 size *= 1024;
 135                 ++endptr;
 136                 break;
 137         case 0:
 138                 break;
 139         default:
 140                 return 0;
 141         }
 142
 143         if (*endptr)
 144                 return 0;
 145
 146         *s = size;
 147
 148         return 1;
 149 }
 150
 151 static const char * const cmd_qgroup_assign_usage[] = {
 152         "btrfs qgroup assign <src> <dst> <path>",
 153         "Enable subvolume qgroup support for a filesystem.",
 154         NULL
 155 };
 156
 157 static int cmd_qgroup_assign(int argc, char **argv)
 158 {
 159         int ret = qgroup_assign(1, argc, argv);
 160         if (ret < 0)
 161                 usage(cmd_qgroup_assign_usage);
 162         return ret;
 163 }
 164
 165 static const char * const cmd_qgroup_remove_usage[] = {
 166         "btrfs qgroup remove <src> <dst> <path>",
 167         "Remove a subvol from a quota group.",
 168         NULL
 169 };
 170
 171 static int cmd_qgroup_remove(int argc, char **argv)
 172 {
 173         int ret = qgroup_assign(0, argc, argv);
 174         if (ret < 0)
 175                 usage(cmd_qgroup_remove_usage);
 176         return ret;
 177 }
 178
 179 static const char * const cmd_qgroup_create_usage[] = {
 180         "btrfs qgroup create <qgroupid> <path>",
 181         "Create a subvolume quota group.",
 182         NULL
 183 };
 184
 185 static int cmd_qgroup_create(int argc, char **argv)
 186 {
 187         int ret = qgroup_create(1, argc, argv);
 188         if (ret < 0)
 189                 usage(cmd_qgroup_create_usage);
 190         return ret;
 191 }
 192
 193 static const char * const cmd_qgroup_destroy_usage[] = {
 194         "btrfs qgroup destroy <qgroupid> <path>",
 195         "Destroy a subvolume quota group.",
 196         NULL
 197 };
 198
 199 static int cmd_qgroup_destroy(int argc, char **argv)
 200 {
 201         int ret = qgroup_create(0, argc, argv);
 202         if (ret < 0)
 203                 usage(cmd_qgroup_destroy_usage);
 204         return ret;
 205 }
 206
 207 static const char * const cmd_qgroup_show_usage[] = {
 208         "btrfs qgroup show -pcreFf "
 209         "[--sort=qgroupid,rfer,excl,max_rfer,max_excl] <path>",
 210         "Show subvolume quota groups.",
 211         "-p             print parent qgroup id",
 212         "-c             print child qgroup id",
 213         "-r             print limit of referenced size of qgroup",
 214         "-e             print limit of exclusive size of qgroup",
 215         "-F             list all qgroups which impact the given path",
 216         "               (including ancestral qgroups)",
 217         "-f             list all qgroups which impact the given path",
 218         "               (excluding ancestral qgroups)",
 219         "--raw          raw numbers in bytes",
 220         "--human-readable",
 221         "               human firendly numbers in given base, 1024 by default",
 222         "--iec          use 1024 as a base (KiB, MiB, GiB, TiB)",
 223         "--si           use 1000 as a base (kB, MB, GB, TB)",
 224         "--kbytes       show sizes in KiB, or kB with --si",
 225         "--mbytes       show sizes in MiB, or MB with --si",
 226         "--gbytes       show sizes in GiB, or GB with --si",
 227         "--tbytes       show sizes in TiB, or TB with --si",
 228         "--sort=qgroupid,rfer,excl,max_rfer,max_excl",
 229         "               list qgroups sorted by specified items",
 230         "               you can use '+' or '-' in front of each item.",
 231         "               (+:ascending, -:descending, ascending default)",
 232         NULL
 233 };
 234
 235 static int cmd_qgroup_show(int argc, char **argv)
 236 {
 237         char *path;
 238         int ret = 0;
 239         int fd;
 240         int e;
 241         DIR *dirstream = NULL;
 242         u64 qgroupid;
 243         int filter_flag = 0;
 244         unsigned unit_mode = UNITS_DEFAULT;
 245
 246         struct btrfs_qgroup_comparer_set *comparer_set;
 247         struct btrfs_qgroup_filter_set *filter_set;
 248         filter_set = btrfs_qgroup_alloc_filter_set();
 249         comparer_set = btrfs_qgroup_alloc_comparer_set();
 250
 251         optind = 1;
 252         while (1) {
 253                 int c;
 254                 static const struct option long_options[] = {
 255                         {"sort", required_argument, NULL, 'S'},
 256                         {"raw", no_argument, NULL, GETOPT_VAL_RAW},
 257                         {"kbytes", no_argument, NULL, GETOPT_VAL_KBYTES},
 258                         {"mbytes", no_argument, NULL, GETOPT_VAL_MBYTES},
 259                         {"gbytes", no_argument, NULL, GETOPT_VAL_GBYTES},
 260                         {"tbytes", no_argument, NULL, GETOPT_VAL_TBYTES},
 261                         {"si", no_argument, NULL, GETOPT_VAL_SI},
 262                         {"iec", no_argument, NULL, GETOPT_VAL_IEC},
 263                         { "human-readable", no_argument, NULL,
 264                                 GETOPT_VAL_HUMAN_READABLE},
 265                         { NULL, 0, NULL, 0 }
 266                 };
 267
 268                 c = getopt_long(argc, argv, "pcreFf", long_options, NULL);
 269                 if (c < 0)
 270                         break;
 271                 switch (c) {
 272                 case 'p':
 273                         btrfs_qgroup_setup_print_column(
 274                                 BTRFS_QGROUP_PARENT);
 275                         break;
 276                 case 'c':
 277                         btrfs_qgroup_setup_print_column(
 278                                 BTRFS_QGROUP_CHILD);
 279                         break;
 280                 case 'r':
 281                         btrfs_qgroup_setup_print_column(
 282                                 BTRFS_QGROUP_MAX_RFER);
 283                         break;
 284                 case 'e':
 285                         btrfs_qgroup_setup_print_column(
 286                                 BTRFS_QGROUP_MAX_EXCL);
 287                         break;
 288                 case 'F':
 289                         filter_flag |= 0x1;
 290                         break;
 291                 case 'f':
 292                         filter_flag |= 0x2;
 293                         break;
 294                 case 'S':
 295                         ret = btrfs_qgroup_parse_sort_string(optarg,
 296                                                              &comparer_set);
 297                         if (ret)
 298                                 usage(cmd_qgroup_show_usage);
 299                         break;
 300                 case GETOPT_VAL_RAW:
 301                         unit_mode = UNITS_RAW;
 302                         break;
 303                 case GETOPT_VAL_KBYTES:
 304                         units_set_base(&unit_mode, UNITS_KBYTES);
 305                         break;
 306                 case GETOPT_VAL_MBYTES:
 307                         units_set_base(&unit_mode, UNITS_MBYTES);
 308                         break;
 309                 case GETOPT_VAL_GBYTES:
 310                         units_set_base(&unit_mode, UNITS_GBYTES);
 311                         break;
 312                 case GETOPT_VAL_TBYTES:
 313                         units_set_base(&unit_mode, UNITS_TBYTES);
 314                         break;
 315                 case GETOPT_VAL_SI:
 316                         units_set_mode(&unit_mode, UNITS_DECIMAL);
 317                         break;
 318                 case GETOPT_VAL_IEC:
 319                         units_set_mode(&unit_mode, UNITS_BINARY);
 320                         break;
 321                 case GETOPT_VAL_HUMAN_READABLE:
 322                         unit_mode = UNITS_HUMAN_BINARY;
 323                         break;
 324                 default:
 325                         usage(cmd_qgroup_show_usage);
 326                 }
 327         }
 328         btrfs_qgroup_setup_units(unit_mode);
 329
 330         if (check_argc_exact(argc - optind, 1))
 331                 usage(cmd_qgroup_show_usage);
 332
 333         path = argv[optind];
 334         fd = open_file_or_dir(path, &dirstream);
 335         if (fd < 0) {
 336                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
 337                 return 1;
 338         }
 339
 340         if (filter_flag) {
 341                 qgroupid = btrfs_get_path_rootid(fd);
 342                 if (filter_flag & 0x1)
 343                         btrfs_qgroup_setup_filter(&filter_set,
 344                                         BTRFS_QGROUP_FILTER_ALL_PARENT,
 345                                         qgroupid);
 346                 if (filter_flag & 0x2)
 347                         btrfs_qgroup_setup_filter(&filter_set,
 348                                         BTRFS_QGROUP_FILTER_PARENT,
 349                                         qgroupid);
 350         }
 351         ret = btrfs_show_qgroups(fd, filter_set, comparer_set);
 352         e = errno;
 353         close_file_or_dir(fd, dirstream);
 354         if (ret < 0)
 355                 fprintf(stderr, "ERROR: can't list qgroups: %s\n",
 356                                 strerror(e));
 357
 358         return !!ret;
 359 }
 360
 361 static const char * const cmd_qgroup_limit_usage[] = {
 362         "btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>",
 363         "Limit the size of a subvolume quota group.",
 364         "",
 365         "-c   limit amount of data after compression. This is the default,",
 366         "     it is currently not possible to turn off this option.",
 367         "-e   limit space exclusively assigned to this qgroup",
 368         NULL
 369 };
 370
 371 static int cmd_qgroup_limit(int argc, char **argv)
 372 {
 373         int ret = 0;
 374         int fd;
 375         int e;
 376         char *path = NULL;
 377         struct btrfs_ioctl_qgroup_limit_args args;
 378         unsigned long long size;
 379         int compressed = 0;
 380         int exclusive = 0;
 381         DIR *dirstream = NULL;
 382
 383         optind = 1;
 384         while (1) {
 385                 int c = getopt(argc, argv, "ce");
 386                 if (c < 0)
 387                         break;
 388                 switch (c) {
 389                 case 'c':
 390                         compressed = 1;
 391                         break;
 392                 case 'e':
 393                         exclusive = 1;
 394                         break;
 395                 default:
 396                         usage(cmd_qgroup_limit_usage);
 397                 }
 398         }
 399
 400         if (check_argc_min(argc - optind, 2))
 401                 usage(cmd_qgroup_limit_usage);
 402
 403         if (!parse_limit(argv[optind], &size)) {
 404                 fprintf(stderr, "Invalid size argument given\n");
 405                 return 1;
 406         }
 407
 408         memset(&args, 0, sizeof(args));
 409         if (size) {
 410                 if (compressed)
 411                         args.lim.flags |= BTRFS_QGROUP_LIMIT_RFER_CMPR |
 412                                           BTRFS_QGROUP_LIMIT_EXCL_CMPR;
 413                 if (exclusive) {
 414                         args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_EXCL;
 415                         args.lim.max_exclusive = size;
 416                 } else {
 417                         args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_RFER;
 418                         args.lim.max_referenced = size;
 419                 }
 420         }
 421
 422         if (argc - optind == 2) {
 423                 args.qgroupid = 0;
 424                 path = argv[optind + 1];
 425                 ret = test_issubvolume(path);
 426                 if (ret < 0) {
 427                         fprintf(stderr, "ERROR: error accessing '%s'\n", path);
 428                         return 1;
 429                 }
 430                 if (!ret) {
 431                         fprintf(stderr, "ERROR: '%s' is not a subvolume\n",
 432                                 path);
 433                         return 1;
 434                 }
 435                 /*
 436                  * keep qgroupid at 0, this indicates that the subvolume the
 437                  * fd refers to is to be limited
 438                  */
 439         } else if (argc - optind == 3) {
 440                 args.qgroupid = parse_qgroupid(argv[optind + 1]);
 441                 path = argv[optind + 2];
 442         } else
 443                 usage(cmd_qgroup_limit_usage);
 444
 445         fd = open_file_or_dir(path, &dirstream);
 446         if (fd < 0) {
 447                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
 448                 return 1;
 449         }
 450
 451         ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
 452         e = errno;
 453         close_file_or_dir(fd, dirstream);
 454         if (ret < 0) {
 455                 fprintf(stderr, "ERROR: unable to limit requested quota group: "
 456                         "%s\n", strerror(e));
 457                 return 1;
 458         }
 459         return 0;
 460 }
 461
 462 const struct cmd_group qgroup_cmd_group = {
 463         qgroup_cmd_group_usage, NULL, {
 464                 { "assign", cmd_qgroup_assign, cmd_qgroup_assign_usage,
 465                    NULL, 0 },
 466                 { "remove", cmd_qgroup_remove, cmd_qgroup_remove_usage,
 467                    NULL, 0 },
 468                 { "create", cmd_qgroup_create, cmd_qgroup_create_usage,
 469                    NULL, 0 },
 470                 { "destroy", cmd_qgroup_destroy, cmd_qgroup_destroy_usage,
 471                    NULL, 0 },
 472                 { "show", cmd_qgroup_show, cmd_qgroup_show_usage,
 473                    NULL, 0 },
 474                 { "limit", cmd_qgroup_limit, cmd_qgroup_limit_usage,
 475                    NULL, 0 },
 476                 NULL_CMD_STRUCT
 477         }
 478 };
 479
 480 int cmd_qgroup(int argc, char **argv)
 481 {
 482         return handle_command_group(&qgroup_cmd_group, argc, argv);
 483 }