git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/quota.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "bcachefs.h"
   3 #include "btree_update.h"
   4 #include "inode.h"
   5 #include "quota.h"
   6 #include "subvolume.h"
   7 #include "super-io.h"
   8
   9 static int bch2_sb_validate_quota(struct bch_sb *sb, struct bch_sb_field *f,
  10                                   struct printbuf *err)
  11 {
  12         struct bch_sb_field_quota *q = field_to_type(f, quota);
  13
  14         if (vstruct_bytes(&q->field) < sizeof(*q)) {
  15                 pr_buf(err, "wrong size (got %llu should be %zu)",
  16                        vstruct_bytes(&q->field), sizeof(*q));
  17         }
  18
  19         return 0;
  20 }
  21
  22 const struct bch_sb_field_ops bch_sb_field_ops_quota = {
  23         .validate       = bch2_sb_validate_quota,
  24 };
  25
  26 const char *bch2_quota_invalid(const struct bch_fs *c, struct bkey_s_c k)
  27 {
  28         if (k.k->p.inode >= QTYP_NR)
  29                 return "invalid quota type";
  30
  31         if (bkey_val_bytes(k.k) != sizeof(struct bch_quota))
  32                 return "incorrect value size";
  33
  34         return NULL;
  35 }
  36
  37 static const char * const bch2_quota_counters[] = {
  38         "space",
  39         "inodes",
  40 };
  41
  42 void bch2_quota_to_text(struct printbuf *out, struct bch_fs *c,
  43                         struct bkey_s_c k)
  44 {
  45         struct bkey_s_c_quota dq = bkey_s_c_to_quota(k);
  46         unsigned i;
  47
  48         for (i = 0; i < Q_COUNTERS; i++)
  49                 pr_buf(out, "%s hardlimit %llu softlimit %llu",
  50                        bch2_quota_counters[i],
  51                        le64_to_cpu(dq.v->c[i].hardlimit),
  52                        le64_to_cpu(dq.v->c[i].softlimit));
  53 }
  54
  55 #ifdef CONFIG_BCACHEFS_QUOTA
  56
  57 #include <linux/cred.h>
  58 #include <linux/fs.h>
  59 #include <linux/quota.h>
  60
  61 static inline unsigned __next_qtype(unsigned i, unsigned qtypes)
  62 {
  63         qtypes >>= i;
  64         return qtypes ? i + __ffs(qtypes) : QTYP_NR;
  65 }
  66
  67 #define for_each_set_qtype(_c, _i, _q, _qtypes)                         \
  68         for (_i = 0;                                                    \
  69              (_i = __next_qtype(_i, _qtypes),                           \
  70               _q = &(_c)->quotas[_i],                                   \
  71               _i < QTYP_NR);                                            \
  72              _i++)
  73
  74 static bool ignore_hardlimit(struct bch_memquota_type *q)
  75 {
  76         if (capable(CAP_SYS_RESOURCE))
  77                 return true;
  78 #if 0
  79         struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
  80
  81         return capable(CAP_SYS_RESOURCE) &&
  82                (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
  83                 !(info->dqi_flags & DQF_ROOT_SQUASH));
  84 #endif
  85         return false;
  86 }
  87
  88 enum quota_msg {
  89         SOFTWARN,       /* Softlimit reached */
  90         SOFTLONGWARN,   /* Grace time expired */
  91         HARDWARN,       /* Hardlimit reached */
  92
  93         HARDBELOW,      /* Usage got below inode hardlimit */
  94         SOFTBELOW,      /* Usage got below inode softlimit */
  95 };
  96
  97 static int quota_nl[][Q_COUNTERS] = {
  98         [HARDWARN][Q_SPC]       = QUOTA_NL_BHARDWARN,
  99         [SOFTLONGWARN][Q_SPC]   = QUOTA_NL_BSOFTLONGWARN,
 100         [SOFTWARN][Q_SPC]       = QUOTA_NL_BSOFTWARN,
 101         [HARDBELOW][Q_SPC]      = QUOTA_NL_BHARDBELOW,
 102         [SOFTBELOW][Q_SPC]      = QUOTA_NL_BSOFTBELOW,
 103
 104         [HARDWARN][Q_INO]       = QUOTA_NL_IHARDWARN,
 105         [SOFTLONGWARN][Q_INO]   = QUOTA_NL_ISOFTLONGWARN,
 106         [SOFTWARN][Q_INO]       = QUOTA_NL_ISOFTWARN,
 107         [HARDBELOW][Q_INO]      = QUOTA_NL_IHARDBELOW,
 108         [SOFTBELOW][Q_INO]      = QUOTA_NL_ISOFTBELOW,
 109 };
 110
 111 struct quota_msgs {
 112         u8              nr;
 113         struct {
 114                 u8      qtype;
 115                 u8      msg;
 116         }               m[QTYP_NR * Q_COUNTERS];
 117 };
 118
 119 static void prepare_msg(unsigned qtype,
 120                         enum quota_counters counter,
 121                         struct quota_msgs *msgs,
 122                         enum quota_msg msg_type)
 123 {
 124         BUG_ON(msgs->nr >= ARRAY_SIZE(msgs->m));
 125
 126         msgs->m[msgs->nr].qtype = qtype;
 127         msgs->m[msgs->nr].msg   = quota_nl[msg_type][counter];
 128         msgs->nr++;
 129 }
 130
 131 static void prepare_warning(struct memquota_counter *qc,
 132                             unsigned qtype,
 133                             enum quota_counters counter,
 134                             struct quota_msgs *msgs,
 135                             enum quota_msg msg_type)
 136 {
 137         if (qc->warning_issued & (1 << msg_type))
 138                 return;
 139
 140         prepare_msg(qtype, counter, msgs, msg_type);
 141 }
 142
 143 static void flush_warnings(struct bch_qid qid,
 144                            struct super_block *sb,
 145                            struct quota_msgs *msgs)
 146 {
 147         unsigned i;
 148
 149         for (i = 0; i < msgs->nr; i++)
 150                 quota_send_warning(make_kqid(&init_user_ns, msgs->m[i].qtype, qid.q[i]),
 151                                    sb->s_dev, msgs->m[i].msg);
 152 }
 153
 154 static int bch2_quota_check_limit(struct bch_fs *c,
 155                                   unsigned qtype,
 156                                   struct bch_memquota *mq,
 157                                   struct quota_msgs *msgs,
 158                                   enum quota_counters counter,
 159                                   s64 v,
 160                                   enum quota_acct_mode mode)
 161 {
 162         struct bch_memquota_type *q = &c->quotas[qtype];
 163         struct memquota_counter *qc = &mq->c[counter];
 164         u64 n = qc->v + v;
 165
 166         BUG_ON((s64) n < 0);
 167
 168         if (mode == KEY_TYPE_QUOTA_NOCHECK)
 169                 return 0;
 170
 171         if (v <= 0) {
 172                 if (n < qc->hardlimit &&
 173                     (qc->warning_issued & (1 << HARDWARN))) {
 174                         qc->warning_issued &= ~(1 << HARDWARN);
 175                         prepare_msg(qtype, counter, msgs, HARDBELOW);
 176                 }
 177
 178                 if (n < qc->softlimit &&
 179                     (qc->warning_issued & (1 << SOFTWARN))) {
 180                         qc->warning_issued &= ~(1 << SOFTWARN);
 181                         prepare_msg(qtype, counter, msgs, SOFTBELOW);
 182                 }
 183
 184                 qc->warning_issued = 0;
 185                 return 0;
 186         }
 187
 188         if (qc->hardlimit &&
 189             qc->hardlimit < n &&
 190             !ignore_hardlimit(q)) {
 191                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 192                         return -EDQUOT;
 193
 194                 prepare_warning(qc, qtype, counter, msgs, HARDWARN);
 195         }
 196
 197         if (qc->softlimit &&
 198             qc->softlimit < n &&
 199             qc->timer &&
 200             ktime_get_real_seconds() >= qc->timer &&
 201             !ignore_hardlimit(q)) {
 202                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 203                         return -EDQUOT;
 204
 205                 prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
 206         }
 207
 208         if (qc->softlimit &&
 209             qc->softlimit < n &&
 210             qc->timer == 0) {
 211                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 212                         return -EDQUOT;
 213
 214                 prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
 215
 216                 /* XXX is this the right one? */
 217                 qc->timer = ktime_get_real_seconds() +
 218                         q->limits[counter].warnlimit;
 219         }
 220
 221         return 0;
 222 }
 223
 224 int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
 225                     enum quota_counters counter, s64 v,
 226                     enum quota_acct_mode mode)
 227 {
 228         unsigned qtypes = enabled_qtypes(c);
 229         struct bch_memquota_type *q;
 230         struct bch_memquota *mq[QTYP_NR];
 231         struct quota_msgs msgs;
 232         unsigned i;
 233         int ret = 0;
 234
 235         memset(&msgs, 0, sizeof(msgs));
 236
 237         for_each_set_qtype(c, i, q, qtypes)
 238                 mutex_lock_nested(&q->lock, i);
 239
 240         for_each_set_qtype(c, i, q, qtypes) {
 241                 mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_NOFS);
 242                 if (!mq[i]) {
 243                         ret = -ENOMEM;
 244                         goto err;
 245                 }
 246
 247                 ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
 248                 if (ret)
 249                         goto err;
 250         }
 251
 252         for_each_set_qtype(c, i, q, qtypes)
 253                 mq[i]->c[counter].v += v;
 254 err:
 255         for_each_set_qtype(c, i, q, qtypes)
 256                 mutex_unlock(&q->lock);
 257
 258         flush_warnings(qid, c->vfs_sb, &msgs);
 259
 260         return ret;
 261 }
 262
 263 static void __bch2_quota_transfer(struct bch_memquota *src_q,
 264                                   struct bch_memquota *dst_q,
 265                                   enum quota_counters counter, s64 v)
 266 {
 267         BUG_ON(v > src_q->c[counter].v);
 268         BUG_ON(v + dst_q->c[counter].v < v);
 269
 270         src_q->c[counter].v -= v;
 271         dst_q->c[counter].v += v;
 272 }
 273
 274 int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
 275                         struct bch_qid dst,
 276                         struct bch_qid src, u64 space,
 277                         enum quota_acct_mode mode)
 278 {
 279         struct bch_memquota_type *q;
 280         struct bch_memquota *src_q[3], *dst_q[3];
 281         struct quota_msgs msgs;
 282         unsigned i;
 283         int ret = 0;
 284
 285         qtypes &= enabled_qtypes(c);
 286
 287         memset(&msgs, 0, sizeof(msgs));
 288
 289         for_each_set_qtype(c, i, q, qtypes)
 290                 mutex_lock_nested(&q->lock, i);
 291
 292         for_each_set_qtype(c, i, q, qtypes) {
 293                 src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_NOFS);
 294                 dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_NOFS);
 295
 296                 if (!src_q[i] || !dst_q[i]) {
 297                         ret = -ENOMEM;
 298                         goto err;
 299                 }
 300
 301                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
 302                                              dst_q[i]->c[Q_SPC].v + space,
 303                                              mode);
 304                 if (ret)
 305                         goto err;
 306
 307                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
 308                                              dst_q[i]->c[Q_INO].v + 1,
 309                                              mode);
 310                 if (ret)
 311                         goto err;
 312         }
 313
 314         for_each_set_qtype(c, i, q, qtypes) {
 315                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
 316                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
 317         }
 318
 319 err:
 320         for_each_set_qtype(c, i, q, qtypes)
 321                 mutex_unlock(&q->lock);
 322
 323         flush_warnings(dst, c->vfs_sb, &msgs);
 324
 325         return ret;
 326 }
 327
 328 static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k)
 329 {
 330         struct bkey_s_c_quota dq;
 331         struct bch_memquota_type *q;
 332         struct bch_memquota *mq;
 333         unsigned i;
 334
 335         BUG_ON(k.k->p.inode >= QTYP_NR);
 336
 337         switch (k.k->type) {
 338         case KEY_TYPE_quota:
 339                 dq = bkey_s_c_to_quota(k);
 340                 q = &c->quotas[k.k->p.inode];
 341
 342                 mutex_lock(&q->lock);
 343                 mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
 344                 if (!mq) {
 345                         mutex_unlock(&q->lock);
 346                         return -ENOMEM;
 347                 }
 348
 349                 for (i = 0; i < Q_COUNTERS; i++) {
 350                         mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
 351                         mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
 352                 }
 353
 354                 mutex_unlock(&q->lock);
 355         }
 356
 357         return 0;
 358 }
 359
 360 static int bch2_quota_init_type(struct bch_fs *c, enum quota_types type)
 361 {
 362         struct btree_trans trans;
 363         struct btree_iter iter;
 364         struct bkey_s_c k;
 365         int ret = 0;
 366
 367         bch2_trans_init(&trans, c, 0, 0);
 368
 369         for_each_btree_key(&trans, iter, BTREE_ID_quotas, POS(type, 0),
 370                            BTREE_ITER_PREFETCH, k, ret) {
 371                 if (k.k->p.inode != type)
 372                         break;
 373
 374                 ret = __bch2_quota_set(c, k);
 375                 if (ret)
 376                         break;
 377         }
 378         bch2_trans_iter_exit(&trans, &iter);
 379
 380         bch2_trans_exit(&trans);
 381         return ret;
 382 }
 383
 384 void bch2_fs_quota_exit(struct bch_fs *c)
 385 {
 386         unsigned i;
 387
 388         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 389                 genradix_free(&c->quotas[i].table);
 390 }
 391
 392 void bch2_fs_quota_init(struct bch_fs *c)
 393 {
 394         unsigned i;
 395
 396         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 397                 mutex_init(&c->quotas[i].lock);
 398 }
 399
 400 static void bch2_sb_quota_read(struct bch_fs *c)
 401 {
 402         struct bch_sb_field_quota *sb_quota;
 403         unsigned i, j;
 404
 405         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 406         if (!sb_quota)
 407                 return;
 408
 409         for (i = 0; i < QTYP_NR; i++) {
 410                 struct bch_memquota_type *q = &c->quotas[i];
 411
 412                 for (j = 0; j < Q_COUNTERS; j++) {
 413                         q->limits[j].timelimit =
 414                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 415                         q->limits[j].warnlimit =
 416                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 417                 }
 418         }
 419 }
 420
 421 static int bch2_fs_quota_read_inode(struct btree_trans *trans,
 422                                     struct btree_iter *iter)
 423 {
 424         struct bch_fs *c = trans->c;
 425         struct bch_inode_unpacked u;
 426         struct bch_subvolume subvolume;
 427         struct bkey_s_c k;
 428         int ret;
 429
 430         k = bch2_btree_iter_peek(iter);
 431         ret = bkey_err(k);
 432         if (ret)
 433                 return ret;
 434
 435         if (!k.k)
 436                 return 1;
 437
 438         ret = bch2_snapshot_get_subvol(trans, k.k->p.snapshot, &subvolume);
 439         if (ret)
 440                 return ret;
 441
 442         /*
 443          * We don't do quota accounting in snapshots:
 444          */
 445         if (BCH_SUBVOLUME_SNAP(&subvolume))
 446                 goto advance;
 447
 448         if (!bkey_is_inode(k.k))
 449                 goto advance;
 450
 451         ret = bch2_inode_unpack(k, &u);
 452         if (ret)
 453                 return ret;
 454
 455         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 456                         KEY_TYPE_QUOTA_NOCHECK);
 457         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 458                         KEY_TYPE_QUOTA_NOCHECK);
 459 advance:
 460         bch2_btree_iter_set_pos(iter, POS(iter->pos.inode, iter->pos.offset + 1));
 461         return 0;
 462 }
 463
 464 int bch2_fs_quota_read(struct bch_fs *c)
 465 {
 466         unsigned i, qtypes = enabled_qtypes(c);
 467         struct bch_memquota_type *q;
 468         struct btree_trans trans;
 469         struct btree_iter iter;
 470         int ret;
 471
 472         mutex_lock(&c->sb_lock);
 473         bch2_sb_quota_read(c);
 474         mutex_unlock(&c->sb_lock);
 475
 476         for_each_set_qtype(c, i, q, qtypes) {
 477                 ret = bch2_quota_init_type(c, i);
 478                 if (ret)
 479                         return ret;
 480         }
 481
 482         bch2_trans_init(&trans, c, 0, 0);
 483
 484         bch2_trans_iter_init(&trans, &iter, BTREE_ID_inodes, POS_MIN,
 485                              BTREE_ITER_INTENT|
 486                              BTREE_ITER_PREFETCH|
 487                              BTREE_ITER_ALL_SNAPSHOTS);
 488         do {
 489                 ret = lockrestart_do(&trans,
 490                                      bch2_fs_quota_read_inode(&trans, &iter));
 491         } while (!ret);
 492         bch2_trans_iter_exit(&trans, &iter);
 493
 494         bch2_trans_exit(&trans);
 495         return ret < 0 ? ret : 0;
 496 }
 497
 498 /* Enable/disable/delete quotas for an entire filesystem: */
 499
 500 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 501 {
 502         struct bch_fs *c = sb->s_fs_info;
 503
 504         if (sb->s_flags & SB_RDONLY)
 505                 return -EROFS;
 506
 507         /* Accounting must be enabled at mount time: */
 508         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 509                 return -EINVAL;
 510
 511         /* Can't enable enforcement without accounting: */
 512         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 513                 return -EINVAL;
 514
 515         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 516                 return -EINVAL;
 517
 518         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 519                 return -EINVAL;
 520
 521         mutex_lock(&c->sb_lock);
 522         if (uflags & FS_QUOTA_UDQ_ENFD)
 523                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
 524
 525         if (uflags & FS_QUOTA_GDQ_ENFD)
 526                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
 527
 528         if (uflags & FS_QUOTA_PDQ_ENFD)
 529                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
 530
 531         bch2_write_super(c);
 532         mutex_unlock(&c->sb_lock);
 533
 534         return 0;
 535 }
 536
 537 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 538 {
 539         struct bch_fs *c = sb->s_fs_info;
 540
 541         if (sb->s_flags & SB_RDONLY)
 542                 return -EROFS;
 543
 544         mutex_lock(&c->sb_lock);
 545         if (uflags & FS_QUOTA_UDQ_ENFD)
 546                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
 547
 548         if (uflags & FS_QUOTA_GDQ_ENFD)
 549                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
 550
 551         if (uflags & FS_QUOTA_PDQ_ENFD)
 552                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
 553
 554         bch2_write_super(c);
 555         mutex_unlock(&c->sb_lock);
 556
 557         return 0;
 558 }
 559
 560 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 561 {
 562         struct bch_fs *c = sb->s_fs_info;
 563         int ret;
 564
 565         if (sb->s_flags & SB_RDONLY)
 566                 return -EROFS;
 567
 568         if (uflags & FS_USER_QUOTA) {
 569                 if (c->opts.usrquota)
 570                         return -EINVAL;
 571
 572                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 573                                               POS(QTYP_USR, 0),
 574                                               POS(QTYP_USR + 1, 0),
 575                                               0, NULL);
 576                 if (ret)
 577                         return ret;
 578         }
 579
 580         if (uflags & FS_GROUP_QUOTA) {
 581                 if (c->opts.grpquota)
 582                         return -EINVAL;
 583
 584                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 585                                               POS(QTYP_GRP, 0),
 586                                               POS(QTYP_GRP + 1, 0),
 587                                               0, NULL);
 588                 if (ret)
 589                         return ret;
 590         }
 591
 592         if (uflags & FS_PROJ_QUOTA) {
 593                 if (c->opts.prjquota)
 594                         return -EINVAL;
 595
 596                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 597                                               POS(QTYP_PRJ, 0),
 598                                               POS(QTYP_PRJ + 1, 0),
 599                                               0, NULL);
 600                 if (ret)
 601                         return ret;
 602         }
 603
 604         return 0;
 605 }
 606
 607 /*
 608  * Return quota status information, such as enforcements, quota file inode
 609  * numbers etc.
 610  */
 611 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 612 {
 613         struct bch_fs *c = sb->s_fs_info;
 614         unsigned qtypes = enabled_qtypes(c);
 615         unsigned i;
 616
 617         memset(state, 0, sizeof(*state));
 618
 619         for (i = 0; i < QTYP_NR; i++) {
 620                 state->s_state[i].flags |= QCI_SYSFILE;
 621
 622                 if (!(qtypes & (1 << i)))
 623                         continue;
 624
 625                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 626
 627                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 628                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 629
 630                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 631                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 632         }
 633
 634         return 0;
 635 }
 636
 637 /*
 638  * Adjust quota timers & warnings
 639  */
 640 static int bch2_quota_set_info(struct super_block *sb, int type,
 641                                struct qc_info *info)
 642 {
 643         struct bch_fs *c = sb->s_fs_info;
 644         struct bch_sb_field_quota *sb_quota;
 645         struct bch_memquota_type *q;
 646
 647         if (sb->s_flags & SB_RDONLY)
 648                 return -EROFS;
 649
 650         if (type >= QTYP_NR)
 651                 return -EINVAL;
 652
 653         if (!((1 << type) & enabled_qtypes(c)))
 654                 return -ESRCH;
 655
 656         if (info->i_fieldmask &
 657             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 658                 return -EINVAL;
 659
 660         q = &c->quotas[type];
 661
 662         mutex_lock(&c->sb_lock);
 663         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 664         if (!sb_quota) {
 665                 sb_quota = bch2_sb_resize_quota(&c->disk_sb,
 666                                         sizeof(*sb_quota) / sizeof(u64));
 667                 if (!sb_quota)
 668                         return -ENOSPC;
 669         }
 670
 671         if (info->i_fieldmask & QC_SPC_TIMER)
 672                 sb_quota->q[type].c[Q_SPC].timelimit =
 673                         cpu_to_le32(info->i_spc_timelimit);
 674
 675         if (info->i_fieldmask & QC_SPC_WARNS)
 676                 sb_quota->q[type].c[Q_SPC].warnlimit =
 677                         cpu_to_le32(info->i_spc_warnlimit);
 678
 679         if (info->i_fieldmask & QC_INO_TIMER)
 680                 sb_quota->q[type].c[Q_INO].timelimit =
 681                         cpu_to_le32(info->i_ino_timelimit);
 682
 683         if (info->i_fieldmask & QC_INO_WARNS)
 684                 sb_quota->q[type].c[Q_INO].warnlimit =
 685                         cpu_to_le32(info->i_ino_warnlimit);
 686
 687         bch2_sb_quota_read(c);
 688
 689         bch2_write_super(c);
 690         mutex_unlock(&c->sb_lock);
 691
 692         return 0;
 693 }
 694
 695 /* Get/set individual quotas: */
 696
 697 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 698 {
 699         dst->d_space            = src->c[Q_SPC].v << 9;
 700         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 701         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 702         dst->d_spc_timer        = src->c[Q_SPC].timer;
 703         dst->d_spc_warns        = src->c[Q_SPC].warns;
 704
 705         dst->d_ino_count        = src->c[Q_INO].v;
 706         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 707         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 708         dst->d_ino_timer        = src->c[Q_INO].timer;
 709         dst->d_ino_warns        = src->c[Q_INO].warns;
 710 }
 711
 712 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 713                           struct qc_dqblk *qdq)
 714 {
 715         struct bch_fs *c                = sb->s_fs_info;
 716         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 717         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 718         struct bch_memquota *mq;
 719
 720         memset(qdq, 0, sizeof(*qdq));
 721
 722         mutex_lock(&q->lock);
 723         mq = genradix_ptr(&q->table, qid);
 724         if (mq)
 725                 __bch2_quota_get(qdq, mq);
 726         mutex_unlock(&q->lock);
 727
 728         return 0;
 729 }
 730
 731 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 732                                struct qc_dqblk *qdq)
 733 {
 734         struct bch_fs *c                = sb->s_fs_info;
 735         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 736         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 737         struct genradix_iter iter;
 738         struct bch_memquota *mq;
 739         int ret = 0;
 740
 741         mutex_lock(&q->lock);
 742
 743         genradix_for_each_from(&q->table, iter, mq, qid)
 744                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 745                         __bch2_quota_get(qdq, mq);
 746                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 747                         goto found;
 748                 }
 749
 750         ret = -ENOENT;
 751 found:
 752         mutex_unlock(&q->lock);
 753         return ret;
 754 }
 755
 756 static int bch2_set_quota_trans(struct btree_trans *trans,
 757                                 struct bkey_i_quota *new_quota,
 758                                 struct qc_dqblk *qdq)
 759 {
 760         struct btree_iter iter;
 761         struct bkey_s_c k;
 762         int ret;
 763
 764         bch2_trans_iter_init(trans, &iter, BTREE_ID_quotas, new_quota->k.p,
 765                              BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 766         k = bch2_btree_iter_peek_slot(&iter);
 767
 768         ret = bkey_err(k);
 769         if (unlikely(ret))
 770                 return ret;
 771
 772         if (k.k->type == KEY_TYPE_quota)
 773                 new_quota->v = *bkey_s_c_to_quota(k).v;
 774
 775         if (qdq->d_fieldmask & QC_SPC_SOFT)
 776                 new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 777         if (qdq->d_fieldmask & QC_SPC_HARD)
 778                 new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 779
 780         if (qdq->d_fieldmask & QC_INO_SOFT)
 781                 new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 782         if (qdq->d_fieldmask & QC_INO_HARD)
 783                 new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 784
 785         ret = bch2_trans_update(trans, &iter, &new_quota->k_i, 0);
 786         bch2_trans_iter_exit(trans, &iter);
 787         return ret;
 788 }
 789
 790 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 791                           struct qc_dqblk *qdq)
 792 {
 793         struct bch_fs *c = sb->s_fs_info;
 794         struct bkey_i_quota new_quota;
 795         int ret;
 796
 797         if (sb->s_flags & SB_RDONLY)
 798                 return -EROFS;
 799
 800         bkey_quota_init(&new_quota.k_i);
 801         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 802
 803         ret = bch2_trans_do(c, NULL, NULL, 0,
 804                             bch2_set_quota_trans(&trans, &new_quota, qdq)) ?:
 805                 __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i));
 806
 807         return ret;
 808 }
 809
 810 const struct quotactl_ops bch2_quotactl_operations = {
 811         .quota_enable           = bch2_quota_enable,
 812         .quota_disable          = bch2_quota_disable,
 813         .rm_xquota              = bch2_quota_remove,
 814
 815         .get_state              = bch2_quota_get_state,
 816         .set_info               = bch2_quota_set_info,
 817
 818         .get_dqblk              = bch2_get_quota,
 819         .get_nextdqblk          = bch2_get_next_quota,
 820         .set_dqblk              = bch2_set_quota,
 821 };
 822
 823 #endif /* CONFIG_BCACHEFS_QUOTA */