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 "super-io.h"
   7
   8 static const char *bch2_sb_validate_quota(struct bch_sb *sb,
   9                                           struct bch_sb_field *f)
  10 {
  11         struct bch_sb_field_quota *q = field_to_type(f, quota);
  12
  13         if (vstruct_bytes(&q->field) != sizeof(*q))
  14                 return "invalid field quota: wrong size";
  15
  16         return NULL;
  17 }
  18
  19 const struct bch_sb_field_ops bch_sb_field_ops_quota = {
  20         .validate       = bch2_sb_validate_quota,
  21 };
  22
  23 const char *bch2_quota_invalid(const struct bch_fs *c, struct bkey_s_c k)
  24 {
  25         if (k.k->p.inode >= QTYP_NR)
  26                 return "invalid quota type";
  27
  28         if (bkey_val_bytes(k.k) != sizeof(struct bch_quota))
  29                 return "incorrect value size";
  30
  31         return NULL;
  32 }
  33
  34 static const char * const bch2_quota_counters[] = {
  35         "space",
  36         "inodes",
  37 };
  38
  39 void bch2_quota_to_text(struct printbuf *out, struct bch_fs *c,
  40                         struct bkey_s_c k)
  41 {
  42         struct bkey_s_c_quota dq = bkey_s_c_to_quota(k);
  43         unsigned i;
  44
  45         for (i = 0; i < Q_COUNTERS; i++)
  46                 pr_buf(out, "%s hardlimit %llu softlimit %llu",
  47                        bch2_quota_counters[i],
  48                        le64_to_cpu(dq.v->c[i].hardlimit),
  49                        le64_to_cpu(dq.v->c[i].softlimit));
  50 }
  51
  52 #ifdef CONFIG_BCACHEFS_QUOTA
  53
  54 #include <linux/cred.h>
  55 #include <linux/fs.h>
  56 #include <linux/quota.h>
  57
  58 static inline unsigned __next_qtype(unsigned i, unsigned qtypes)
  59 {
  60         qtypes >>= i;
  61         return qtypes ? i + __ffs(qtypes) : QTYP_NR;
  62 }
  63
  64 #define for_each_set_qtype(_c, _i, _q, _qtypes)                         \
  65         for (_i = 0;                                                    \
  66              (_i = __next_qtype(_i, _qtypes),                           \
  67               _q = &(_c)->quotas[_i],                                   \
  68               _i < QTYP_NR);                                            \
  69              _i++)
  70
  71 static bool ignore_hardlimit(struct bch_memquota_type *q)
  72 {
  73         if (capable(CAP_SYS_RESOURCE))
  74                 return true;
  75 #if 0
  76         struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
  77
  78         return capable(CAP_SYS_RESOURCE) &&
  79                (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
  80                 !(info->dqi_flags & DQF_ROOT_SQUASH));
  81 #endif
  82         return false;
  83 }
  84
  85 enum quota_msg {
  86         SOFTWARN,       /* Softlimit reached */
  87         SOFTLONGWARN,   /* Grace time expired */
  88         HARDWARN,       /* Hardlimit reached */
  89
  90         HARDBELOW,      /* Usage got below inode hardlimit */
  91         SOFTBELOW,      /* Usage got below inode softlimit */
  92 };
  93
  94 static int quota_nl[][Q_COUNTERS] = {
  95         [HARDWARN][Q_SPC]       = QUOTA_NL_BHARDWARN,
  96         [SOFTLONGWARN][Q_SPC]   = QUOTA_NL_BSOFTLONGWARN,
  97         [SOFTWARN][Q_SPC]       = QUOTA_NL_BSOFTWARN,
  98         [HARDBELOW][Q_SPC]      = QUOTA_NL_BHARDBELOW,
  99         [SOFTBELOW][Q_SPC]      = QUOTA_NL_BSOFTBELOW,
 100
 101         [HARDWARN][Q_INO]       = QUOTA_NL_IHARDWARN,
 102         [SOFTLONGWARN][Q_INO]   = QUOTA_NL_ISOFTLONGWARN,
 103         [SOFTWARN][Q_INO]       = QUOTA_NL_ISOFTWARN,
 104         [HARDBELOW][Q_INO]      = QUOTA_NL_IHARDBELOW,
 105         [SOFTBELOW][Q_INO]      = QUOTA_NL_ISOFTBELOW,
 106 };
 107
 108 struct quota_msgs {
 109         u8              nr;
 110         struct {
 111                 u8      qtype;
 112                 u8      msg;
 113         }               m[QTYP_NR * Q_COUNTERS];
 114 };
 115
 116 static void prepare_msg(unsigned qtype,
 117                         enum quota_counters counter,
 118                         struct quota_msgs *msgs,
 119                         enum quota_msg msg_type)
 120 {
 121         BUG_ON(msgs->nr >= ARRAY_SIZE(msgs->m));
 122
 123         msgs->m[msgs->nr].qtype = qtype;
 124         msgs->m[msgs->nr].msg   = quota_nl[msg_type][counter];
 125         msgs->nr++;
 126 }
 127
 128 static void prepare_warning(struct memquota_counter *qc,
 129                             unsigned qtype,
 130                             enum quota_counters counter,
 131                             struct quota_msgs *msgs,
 132                             enum quota_msg msg_type)
 133 {
 134         if (qc->warning_issued & (1 << msg_type))
 135                 return;
 136
 137         prepare_msg(qtype, counter, msgs, msg_type);
 138 }
 139
 140 static void flush_warnings(struct bch_qid qid,
 141                            struct super_block *sb,
 142                            struct quota_msgs *msgs)
 143 {
 144         unsigned i;
 145
 146         for (i = 0; i < msgs->nr; i++)
 147                 quota_send_warning(make_kqid(&init_user_ns, msgs->m[i].qtype, qid.q[i]),
 148                                    sb->s_dev, msgs->m[i].msg);
 149 }
 150
 151 static int bch2_quota_check_limit(struct bch_fs *c,
 152                                   unsigned qtype,
 153                                   struct bch_memquota *mq,
 154                                   struct quota_msgs *msgs,
 155                                   enum quota_counters counter,
 156                                   s64 v,
 157                                   enum quota_acct_mode mode)
 158 {
 159         struct bch_memquota_type *q = &c->quotas[qtype];
 160         struct memquota_counter *qc = &mq->c[counter];
 161         u64 n = qc->v + v;
 162
 163         BUG_ON((s64) n < 0);
 164
 165         if (mode == KEY_TYPE_QUOTA_NOCHECK)
 166                 return 0;
 167
 168         if (v <= 0) {
 169                 if (n < qc->hardlimit &&
 170                     (qc->warning_issued & (1 << HARDWARN))) {
 171                         qc->warning_issued &= ~(1 << HARDWARN);
 172                         prepare_msg(qtype, counter, msgs, HARDBELOW);
 173                 }
 174
 175                 if (n < qc->softlimit &&
 176                     (qc->warning_issued & (1 << SOFTWARN))) {
 177                         qc->warning_issued &= ~(1 << SOFTWARN);
 178                         prepare_msg(qtype, counter, msgs, SOFTBELOW);
 179                 }
 180
 181                 qc->warning_issued = 0;
 182                 return 0;
 183         }
 184
 185         if (qc->hardlimit &&
 186             qc->hardlimit < n &&
 187             !ignore_hardlimit(q)) {
 188                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 189                         return -EDQUOT;
 190
 191                 prepare_warning(qc, qtype, counter, msgs, HARDWARN);
 192         }
 193
 194         if (qc->softlimit &&
 195             qc->softlimit < n &&
 196             qc->timer &&
 197             ktime_get_real_seconds() >= qc->timer &&
 198             !ignore_hardlimit(q)) {
 199                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 200                         return -EDQUOT;
 201
 202                 prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
 203         }
 204
 205         if (qc->softlimit &&
 206             qc->softlimit < n &&
 207             qc->timer == 0) {
 208                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 209                         return -EDQUOT;
 210
 211                 prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
 212
 213                 /* XXX is this the right one? */
 214                 qc->timer = ktime_get_real_seconds() +
 215                         q->limits[counter].warnlimit;
 216         }
 217
 218         return 0;
 219 }
 220
 221 int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
 222                     enum quota_counters counter, s64 v,
 223                     enum quota_acct_mode mode)
 224 {
 225         unsigned qtypes = enabled_qtypes(c);
 226         struct bch_memquota_type *q;
 227         struct bch_memquota *mq[QTYP_NR];
 228         struct quota_msgs msgs;
 229         unsigned i;
 230         int ret = 0;
 231
 232         memset(&msgs, 0, sizeof(msgs));
 233
 234         for_each_set_qtype(c, i, q, qtypes)
 235                 mutex_lock_nested(&q->lock, i);
 236
 237         for_each_set_qtype(c, i, q, qtypes) {
 238                 mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_NOFS);
 239                 if (!mq[i]) {
 240                         ret = -ENOMEM;
 241                         goto err;
 242                 }
 243
 244                 ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
 245                 if (ret)
 246                         goto err;
 247         }
 248
 249         for_each_set_qtype(c, i, q, qtypes)
 250                 mq[i]->c[counter].v += v;
 251 err:
 252         for_each_set_qtype(c, i, q, qtypes)
 253                 mutex_unlock(&q->lock);
 254
 255         flush_warnings(qid, c->vfs_sb, &msgs);
 256
 257         return ret;
 258 }
 259
 260 static void __bch2_quota_transfer(struct bch_memquota *src_q,
 261                                   struct bch_memquota *dst_q,
 262                                   enum quota_counters counter, s64 v)
 263 {
 264         BUG_ON(v > src_q->c[counter].v);
 265         BUG_ON(v + dst_q->c[counter].v < v);
 266
 267         src_q->c[counter].v -= v;
 268         dst_q->c[counter].v += v;
 269 }
 270
 271 int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
 272                         struct bch_qid dst,
 273                         struct bch_qid src, u64 space,
 274                         enum quota_acct_mode mode)
 275 {
 276         struct bch_memquota_type *q;
 277         struct bch_memquota *src_q[3], *dst_q[3];
 278         struct quota_msgs msgs;
 279         unsigned i;
 280         int ret = 0;
 281
 282         qtypes &= enabled_qtypes(c);
 283
 284         memset(&msgs, 0, sizeof(msgs));
 285
 286         for_each_set_qtype(c, i, q, qtypes)
 287                 mutex_lock_nested(&q->lock, i);
 288
 289         for_each_set_qtype(c, i, q, qtypes) {
 290                 src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_NOFS);
 291                 dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_NOFS);
 292
 293                 if (!src_q[i] || !dst_q[i]) {
 294                         ret = -ENOMEM;
 295                         goto err;
 296                 }
 297
 298                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
 299                                              dst_q[i]->c[Q_SPC].v + space,
 300                                              mode);
 301                 if (ret)
 302                         goto err;
 303
 304                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
 305                                              dst_q[i]->c[Q_INO].v + 1,
 306                                              mode);
 307                 if (ret)
 308                         goto err;
 309         }
 310
 311         for_each_set_qtype(c, i, q, qtypes) {
 312                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
 313                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
 314         }
 315
 316 err:
 317         for_each_set_qtype(c, i, q, qtypes)
 318                 mutex_unlock(&q->lock);
 319
 320         flush_warnings(dst, c->vfs_sb, &msgs);
 321
 322         return ret;
 323 }
 324
 325 static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k)
 326 {
 327         struct bkey_s_c_quota dq;
 328         struct bch_memquota_type *q;
 329         struct bch_memquota *mq;
 330         unsigned i;
 331
 332         BUG_ON(k.k->p.inode >= QTYP_NR);
 333
 334         switch (k.k->type) {
 335         case KEY_TYPE_quota:
 336                 dq = bkey_s_c_to_quota(k);
 337                 q = &c->quotas[k.k->p.inode];
 338
 339                 mutex_lock(&q->lock);
 340                 mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
 341                 if (!mq) {
 342                         mutex_unlock(&q->lock);
 343                         return -ENOMEM;
 344                 }
 345
 346                 for (i = 0; i < Q_COUNTERS; i++) {
 347                         mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
 348                         mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
 349                 }
 350
 351                 mutex_unlock(&q->lock);
 352         }
 353
 354         return 0;
 355 }
 356
 357 static int bch2_quota_init_type(struct bch_fs *c, enum quota_types type)
 358 {
 359         struct btree_trans trans;
 360         struct btree_iter *iter;
 361         struct bkey_s_c k;
 362         int ret = 0;
 363
 364         bch2_trans_init(&trans, c, 0, 0);
 365
 366         for_each_btree_key(&trans, iter, BTREE_ID_quotas, POS(type, 0),
 367                            BTREE_ITER_PREFETCH, k, ret) {
 368                 if (k.k->p.inode != type)
 369                         break;
 370
 371                 ret = __bch2_quota_set(c, k);
 372                 if (ret)
 373                         break;
 374         }
 375
 376         return bch2_trans_exit(&trans) ?: ret;
 377 }
 378
 379 void bch2_fs_quota_exit(struct bch_fs *c)
 380 {
 381         unsigned i;
 382
 383         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 384                 genradix_free(&c->quotas[i].table);
 385 }
 386
 387 void bch2_fs_quota_init(struct bch_fs *c)
 388 {
 389         unsigned i;
 390
 391         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 392                 mutex_init(&c->quotas[i].lock);
 393 }
 394
 395 static void bch2_sb_quota_read(struct bch_fs *c)
 396 {
 397         struct bch_sb_field_quota *sb_quota;
 398         unsigned i, j;
 399
 400         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 401         if (!sb_quota)
 402                 return;
 403
 404         for (i = 0; i < QTYP_NR; i++) {
 405                 struct bch_memquota_type *q = &c->quotas[i];
 406
 407                 for (j = 0; j < Q_COUNTERS; j++) {
 408                         q->limits[j].timelimit =
 409                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 410                         q->limits[j].warnlimit =
 411                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 412                 }
 413         }
 414 }
 415
 416 int bch2_fs_quota_read(struct bch_fs *c)
 417 {
 418         unsigned i, qtypes = enabled_qtypes(c);
 419         struct bch_memquota_type *q;
 420         struct btree_trans trans;
 421         struct btree_iter *iter;
 422         struct bch_inode_unpacked u;
 423         struct bkey_s_c k;
 424         int ret;
 425
 426         mutex_lock(&c->sb_lock);
 427         bch2_sb_quota_read(c);
 428         mutex_unlock(&c->sb_lock);
 429
 430         for_each_set_qtype(c, i, q, qtypes) {
 431                 ret = bch2_quota_init_type(c, i);
 432                 if (ret)
 433                         return ret;
 434         }
 435
 436         bch2_trans_init(&trans, c, 0, 0);
 437
 438         for_each_btree_key(&trans, iter, BTREE_ID_inodes, POS_MIN,
 439                            BTREE_ITER_PREFETCH, k, ret) {
 440                 switch (k.k->type) {
 441                 case KEY_TYPE_inode:
 442                         ret = bch2_inode_unpack(bkey_s_c_to_inode(k), &u);
 443                         if (ret)
 444                                 return ret;
 445
 446                         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 447                                         KEY_TYPE_QUOTA_NOCHECK);
 448                         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 449                                         KEY_TYPE_QUOTA_NOCHECK);
 450                 }
 451         }
 452         return bch2_trans_exit(&trans) ?: ret;
 453 }
 454
 455 /* Enable/disable/delete quotas for an entire filesystem: */
 456
 457 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 458 {
 459         struct bch_fs *c = sb->s_fs_info;
 460
 461         if (sb->s_flags & SB_RDONLY)
 462                 return -EROFS;
 463
 464         /* Accounting must be enabled at mount time: */
 465         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 466                 return -EINVAL;
 467
 468         /* Can't enable enforcement without accounting: */
 469         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 470                 return -EINVAL;
 471
 472         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 473                 return -EINVAL;
 474
 475         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 476                 return -EINVAL;
 477
 478         mutex_lock(&c->sb_lock);
 479         if (uflags & FS_QUOTA_UDQ_ENFD)
 480                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
 481
 482         if (uflags & FS_QUOTA_GDQ_ENFD)
 483                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
 484
 485         if (uflags & FS_QUOTA_PDQ_ENFD)
 486                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
 487
 488         bch2_write_super(c);
 489         mutex_unlock(&c->sb_lock);
 490
 491         return 0;
 492 }
 493
 494 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 495 {
 496         struct bch_fs *c = sb->s_fs_info;
 497
 498         if (sb->s_flags & SB_RDONLY)
 499                 return -EROFS;
 500
 501         mutex_lock(&c->sb_lock);
 502         if (uflags & FS_QUOTA_UDQ_ENFD)
 503                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
 504
 505         if (uflags & FS_QUOTA_GDQ_ENFD)
 506                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
 507
 508         if (uflags & FS_QUOTA_PDQ_ENFD)
 509                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
 510
 511         bch2_write_super(c);
 512         mutex_unlock(&c->sb_lock);
 513
 514         return 0;
 515 }
 516
 517 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 518 {
 519         struct bch_fs *c = sb->s_fs_info;
 520         int ret;
 521
 522         if (sb->s_flags & SB_RDONLY)
 523                 return -EROFS;
 524
 525         if (uflags & FS_USER_QUOTA) {
 526                 if (c->opts.usrquota)
 527                         return -EINVAL;
 528
 529                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 530                                               POS(QTYP_USR, 0),
 531                                               POS(QTYP_USR + 1, 0),
 532                                               NULL);
 533                 if (ret)
 534                         return ret;
 535         }
 536
 537         if (uflags & FS_GROUP_QUOTA) {
 538                 if (c->opts.grpquota)
 539                         return -EINVAL;
 540
 541                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 542                                               POS(QTYP_GRP, 0),
 543                                               POS(QTYP_GRP + 1, 0),
 544                                               NULL);
 545                 if (ret)
 546                         return ret;
 547         }
 548
 549         if (uflags & FS_PROJ_QUOTA) {
 550                 if (c->opts.prjquota)
 551                         return -EINVAL;
 552
 553                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 554                                               POS(QTYP_PRJ, 0),
 555                                               POS(QTYP_PRJ + 1, 0),
 556                                               NULL);
 557                 if (ret)
 558                         return ret;
 559         }
 560
 561         return 0;
 562 }
 563
 564 /*
 565  * Return quota status information, such as enforcements, quota file inode
 566  * numbers etc.
 567  */
 568 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 569 {
 570         struct bch_fs *c = sb->s_fs_info;
 571         unsigned qtypes = enabled_qtypes(c);
 572         unsigned i;
 573
 574         memset(state, 0, sizeof(*state));
 575
 576         for (i = 0; i < QTYP_NR; i++) {
 577                 state->s_state[i].flags |= QCI_SYSFILE;
 578
 579                 if (!(qtypes & (1 << i)))
 580                         continue;
 581
 582                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 583
 584                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 585                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 586
 587                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 588                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 589         }
 590
 591         return 0;
 592 }
 593
 594 /*
 595  * Adjust quota timers & warnings
 596  */
 597 static int bch2_quota_set_info(struct super_block *sb, int type,
 598                                struct qc_info *info)
 599 {
 600         struct bch_fs *c = sb->s_fs_info;
 601         struct bch_sb_field_quota *sb_quota;
 602         struct bch_memquota_type *q;
 603
 604         if (sb->s_flags & SB_RDONLY)
 605                 return -EROFS;
 606
 607         if (type >= QTYP_NR)
 608                 return -EINVAL;
 609
 610         if (!((1 << type) & enabled_qtypes(c)))
 611                 return -ESRCH;
 612
 613         if (info->i_fieldmask &
 614             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 615                 return -EINVAL;
 616
 617         q = &c->quotas[type];
 618
 619         mutex_lock(&c->sb_lock);
 620         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 621         if (!sb_quota) {
 622                 sb_quota = bch2_sb_resize_quota(&c->disk_sb,
 623                                         sizeof(*sb_quota) / sizeof(u64));
 624                 if (!sb_quota)
 625                         return -ENOSPC;
 626         }
 627
 628         if (info->i_fieldmask & QC_SPC_TIMER)
 629                 sb_quota->q[type].c[Q_SPC].timelimit =
 630                         cpu_to_le32(info->i_spc_timelimit);
 631
 632         if (info->i_fieldmask & QC_SPC_WARNS)
 633                 sb_quota->q[type].c[Q_SPC].warnlimit =
 634                         cpu_to_le32(info->i_spc_warnlimit);
 635
 636         if (info->i_fieldmask & QC_INO_TIMER)
 637                 sb_quota->q[type].c[Q_INO].timelimit =
 638                         cpu_to_le32(info->i_ino_timelimit);
 639
 640         if (info->i_fieldmask & QC_INO_WARNS)
 641                 sb_quota->q[type].c[Q_INO].warnlimit =
 642                         cpu_to_le32(info->i_ino_warnlimit);
 643
 644         bch2_sb_quota_read(c);
 645
 646         bch2_write_super(c);
 647         mutex_unlock(&c->sb_lock);
 648
 649         return 0;
 650 }
 651
 652 /* Get/set individual quotas: */
 653
 654 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 655 {
 656         dst->d_space            = src->c[Q_SPC].v << 9;
 657         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 658         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 659         dst->d_spc_timer        = src->c[Q_SPC].timer;
 660         dst->d_spc_warns        = src->c[Q_SPC].warns;
 661
 662         dst->d_ino_count        = src->c[Q_INO].v;
 663         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 664         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 665         dst->d_ino_timer        = src->c[Q_INO].timer;
 666         dst->d_ino_warns        = src->c[Q_INO].warns;
 667 }
 668
 669 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 670                           struct qc_dqblk *qdq)
 671 {
 672         struct bch_fs *c                = sb->s_fs_info;
 673         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 674         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 675         struct bch_memquota *mq;
 676
 677         memset(qdq, 0, sizeof(*qdq));
 678
 679         mutex_lock(&q->lock);
 680         mq = genradix_ptr(&q->table, qid);
 681         if (mq)
 682                 __bch2_quota_get(qdq, mq);
 683         mutex_unlock(&q->lock);
 684
 685         return 0;
 686 }
 687
 688 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 689                                struct qc_dqblk *qdq)
 690 {
 691         struct bch_fs *c                = sb->s_fs_info;
 692         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 693         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 694         struct genradix_iter iter;
 695         struct bch_memquota *mq;
 696         int ret = 0;
 697
 698         mutex_lock(&q->lock);
 699
 700         genradix_for_each_from(&q->table, iter, mq, qid)
 701                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 702                         __bch2_quota_get(qdq, mq);
 703                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 704                         goto found;
 705                 }
 706
 707         ret = -ENOENT;
 708 found:
 709         mutex_unlock(&q->lock);
 710         return ret;
 711 }
 712
 713 static int bch2_set_quota_trans(struct btree_trans *trans,
 714                                 struct bkey_i_quota *new_quota,
 715                                 struct qc_dqblk *qdq)
 716 {
 717         struct btree_iter *iter;
 718         struct bkey_s_c k;
 719         int ret;
 720
 721         iter = bch2_trans_get_iter(trans, BTREE_ID_quotas, new_quota->k.p,
 722                                    BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 723         k = bch2_btree_iter_peek_slot(iter);
 724
 725         ret = bkey_err(k);
 726         if (unlikely(ret))
 727                 return ret;
 728
 729         if (k.k->type == KEY_TYPE_quota)
 730                 new_quota->v = *bkey_s_c_to_quota(k).v;
 731
 732         if (qdq->d_fieldmask & QC_SPC_SOFT)
 733                 new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 734         if (qdq->d_fieldmask & QC_SPC_HARD)
 735                 new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 736
 737         if (qdq->d_fieldmask & QC_INO_SOFT)
 738                 new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 739         if (qdq->d_fieldmask & QC_INO_HARD)
 740                 new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 741
 742         return bch2_trans_update(trans, iter, &new_quota->k_i, 0);
 743 }
 744
 745 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 746                           struct qc_dqblk *qdq)
 747 {
 748         struct bch_fs *c = sb->s_fs_info;
 749         struct bkey_i_quota new_quota;
 750         int ret;
 751
 752         if (sb->s_flags & SB_RDONLY)
 753                 return -EROFS;
 754
 755         bkey_quota_init(&new_quota.k_i);
 756         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 757
 758         ret = bch2_trans_do(c, NULL, NULL, BTREE_INSERT_NOUNLOCK,
 759                             bch2_set_quota_trans(&trans, &new_quota, qdq)) ?:
 760                 __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i));
 761
 762         return ret;
 763 }
 764
 765 const struct quotactl_ops bch2_quotactl_operations = {
 766         .quota_enable           = bch2_quota_enable,
 767         .quota_disable          = bch2_quota_disable,
 768         .rm_xquota              = bch2_quota_remove,
 769
 770         .get_state              = bch2_quota_get_state,
 771         .set_info               = bch2_quota_set_info,
 772
 773         .get_dqblk              = bch2_get_quota,
 774         .get_nextdqblk          = bch2_get_next_quota,
 775         .set_dqblk              = bch2_set_quota,
 776 };
 777
 778 #endif /* CONFIG_BCACHEFS_QUOTA */