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 ((args.src >> 48) >= (args.dst >> 48)) {
  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 max referenced size of qgroup",
 214         "-e             print max exclusive size of qgroup",
 215         "-F             list all qgroups which impact the given path"
 216         "(include ancestral qgroups)",
 217         "-f             list all qgroups which impact the given path"
 218         "(exclude ancestral qgroups)",
 219         "--sort=qgroupid,rfer,excl,max_rfer,max_excl",
 220         "               list qgroups in order of qgroupid,"
 221         "rfer,max_rfer or max_excl",
 222         "               you can use '+' or '-' in front of each item.",
 223         "               (+:ascending, -:descending, ascending default)",
 224         NULL
 225 };
 226
 227 static int cmd_qgroup_show(int argc, char **argv)
 228 {
 229         char *path;
 230         int ret = 0;
 231         int fd;
 232         int e;
 233         DIR *dirstream = NULL;
 234         int c;
 235         u64 qgroupid;
 236         int filter_flag = 0;
 237
 238         struct btrfs_qgroup_comparer_set *comparer_set;
 239         struct btrfs_qgroup_filter_set *filter_set;
 240         filter_set = btrfs_qgroup_alloc_filter_set();
 241         comparer_set = btrfs_qgroup_alloc_comparer_set();
 242         struct option long_options[] = {
 243                 {"sort", 1, NULL, 'S'},
 244                 {0, 0, 0, 0}
 245         };
 246
 247         optind = 1;
 248         while (1) {
 249                 c = getopt_long(argc, argv, "pcreFf",
 250                                 long_options, NULL);
 251                 if (c < 0)
 252                         break;
 253                 switch (c) {
 254                 case 'p':
 255                         btrfs_qgroup_setup_print_column(
 256                                 BTRFS_QGROUP_PARENT);
 257                         break;
 258                 case 'c':
 259                         btrfs_qgroup_setup_print_column(
 260                                 BTRFS_QGROUP_CHILD);
 261                         break;
 262                 case 'r':
 263                         btrfs_qgroup_setup_print_column(
 264                                 BTRFS_QGROUP_MAX_RFER);
 265                         break;
 266                 case 'e':
 267                         btrfs_qgroup_setup_print_column(
 268                                 BTRFS_QGROUP_MAX_EXCL);
 269                         break;
 270                 case 'F':
 271                         filter_flag |= 0x1;
 272                         break;
 273                 case 'f':
 274                         filter_flag |= 0x2;
 275                         break;
 276                 case 'S':
 277                         ret = btrfs_qgroup_parse_sort_string(optarg,
 278                                                              &comparer_set);
 279                         if (ret)
 280                                 usage(cmd_qgroup_show_usage);
 281                         break;
 282                 default:
 283                         usage(cmd_qgroup_show_usage);
 284                 }
 285         }
 286         if (check_argc_exact(argc - optind, 1))
 287                 usage(cmd_qgroup_show_usage);
 288
 289         path = argv[optind];
 290         fd = open_file_or_dir(path, &dirstream);
 291         if (fd < 0) {
 292                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
 293                 return 1;
 294         }
 295
 296         if (filter_flag) {
 297                 qgroupid = btrfs_get_path_rootid(fd);
 298                 if (filter_flag & 0x1)
 299                         btrfs_qgroup_setup_filter(&filter_set,
 300                                         BTRFS_QGROUP_FILTER_ALL_PARENT,
 301                                         qgroupid);
 302                 if (filter_flag & 0x2)
 303                         btrfs_qgroup_setup_filter(&filter_set,
 304                                         BTRFS_QGROUP_FILTER_PARENT,
 305                                         qgroupid);
 306         }
 307         ret = btrfs_show_qgroups(fd, filter_set, comparer_set);
 308         e = errno;
 309         close_file_or_dir(fd, dirstream);
 310         if (ret < 0)
 311                 fprintf(stderr, "ERROR: can't list qgroups: %s\n",
 312                                 strerror(e));
 313
 314         return !!ret;
 315 }
 316
 317 static const char * const cmd_qgroup_limit_usage[] = {
 318         "btrfs qgroup limit [options] <size>|none [<qgroupid>] <path>",
 319         "Limit the size of a subvolume quota group.",
 320         "",
 321         "-c   limit amount of data after compression. This is the default,",
 322         "     it is currently not possible to turn off this option.",
 323         "-e   limit space exclusively assigned to this qgroup",
 324         NULL
 325 };
 326
 327 static int cmd_qgroup_limit(int argc, char **argv)
 328 {
 329         int ret = 0;
 330         int fd;
 331         int e;
 332         char *path = NULL;
 333         struct btrfs_ioctl_qgroup_limit_args args;
 334         unsigned long long size;
 335         int compressed = 0;
 336         int exclusive = 0;
 337         DIR *dirstream = NULL;
 338
 339         optind = 1;
 340         while (1) {
 341                 int c = getopt(argc, argv, "ce");
 342                 if (c < 0)
 343                         break;
 344                 switch (c) {
 345                 case 'c':
 346                         compressed = 1;
 347                         break;
 348                 case 'e':
 349                         exclusive = 1;
 350                         break;
 351                 default:
 352                         usage(cmd_qgroup_limit_usage);
 353                 }
 354         }
 355
 356         if (check_argc_min(argc - optind, 2))
 357                 usage(cmd_qgroup_limit_usage);
 358
 359         if (!parse_limit(argv[optind], &size)) {
 360                 fprintf(stderr, "Invalid size argument given\n");
 361                 return 1;
 362         }
 363
 364         memset(&args, 0, sizeof(args));
 365         if (size) {
 366                 if (compressed)
 367                         args.lim.flags |= BTRFS_QGROUP_LIMIT_RFER_CMPR |
 368                                           BTRFS_QGROUP_LIMIT_EXCL_CMPR;
 369                 if (exclusive) {
 370                         args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_EXCL;
 371                         args.lim.max_exclusive = size;
 372                 } else {
 373                         args.lim.flags |= BTRFS_QGROUP_LIMIT_MAX_RFER;
 374                         args.lim.max_referenced = size;
 375                 }
 376         }
 377
 378         if (argc - optind == 2) {
 379                 args.qgroupid = 0;
 380                 path = argv[optind + 1];
 381                 ret = test_issubvolume(path);
 382                 if (ret < 0) {
 383                         fprintf(stderr, "ERROR: error accessing '%s'\n", path);
 384                         return 1;
 385                 }
 386                 if (!ret) {
 387                         fprintf(stderr, "ERROR: '%s' is not a subvolume\n",
 388                                 path);
 389                         return 1;
 390                 }
 391                 /*
 392                  * keep qgroupid at 0, this indicates that the subvolume the
 393                  * fd refers to is to be limited
 394                  */
 395         } else if (argc - optind == 3) {
 396                 args.qgroupid = parse_qgroupid(argv[optind + 1]);
 397                 path = argv[optind + 2];
 398         } else
 399                 usage(cmd_qgroup_limit_usage);
 400
 401         fd = open_file_or_dir(path, &dirstream);
 402         if (fd < 0) {
 403                 fprintf(stderr, "ERROR: can't access '%s'\n", path);
 404                 return 1;
 405         }
 406
 407         ret = ioctl(fd, BTRFS_IOC_QGROUP_LIMIT, &args);
 408         e = errno;
 409         close_file_or_dir(fd, dirstream);
 410         if (ret < 0) {
 411                 fprintf(stderr, "ERROR: unable to limit requested quota group: "
 412                         "%s\n", strerror(e));
 413                 return 1;
 414         }
 415         return 0;
 416 }
 417
 418 const struct cmd_group qgroup_cmd_group = {
 419         qgroup_cmd_group_usage, NULL, {
 420                 { "assign", cmd_qgroup_assign, cmd_qgroup_assign_usage,
 421                    NULL, 0 },
 422                 { "remove", cmd_qgroup_remove, cmd_qgroup_remove_usage,
 423                    NULL, 0 },
 424                 { "create", cmd_qgroup_create, cmd_qgroup_create_usage,
 425                    NULL, 0 },
 426                 { "destroy", cmd_qgroup_destroy, cmd_qgroup_destroy_usage,
 427                    NULL, 0 },
 428                 { "show", cmd_qgroup_show, cmd_qgroup_show_usage,
 429                    NULL, 0 },
 430                 { "limit", cmd_qgroup_limit, cmd_qgroup_limit_usage,
 431                    NULL, 0 },
 432                 NULL_CMD_STRUCT
 433         }
 434 };
 435
 436 int cmd_qgroup(int argc, char **argv)
 437 {
 438         return handle_command_group(&qgroup_cmd_group, argc, argv);
 439 }