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         bch2_trans_iter_put(&trans, iter);
 376
 377         return bch2_trans_exit(&trans) ?: ret;
 378 }
 379
 380 void bch2_fs_quota_exit(struct bch_fs *c)
 381 {
 382         unsigned i;
 383
 384         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 385                 genradix_free(&c->quotas[i].table);
 386 }
 387
 388 void bch2_fs_quota_init(struct bch_fs *c)
 389 {
 390         unsigned i;
 391
 392         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 393                 mutex_init(&c->quotas[i].lock);
 394 }
 395
 396 static void bch2_sb_quota_read(struct bch_fs *c)
 397 {
 398         struct bch_sb_field_quota *sb_quota;
 399         unsigned i, j;
 400
 401         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 402         if (!sb_quota)
 403                 return;
 404
 405         for (i = 0; i < QTYP_NR; i++) {
 406                 struct bch_memquota_type *q = &c->quotas[i];
 407
 408                 for (j = 0; j < Q_COUNTERS; j++) {
 409                         q->limits[j].timelimit =
 410                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 411                         q->limits[j].warnlimit =
 412                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 413                 }
 414         }
 415 }
 416
 417 int bch2_fs_quota_read(struct bch_fs *c)
 418 {
 419         unsigned i, qtypes = enabled_qtypes(c);
 420         struct bch_memquota_type *q;
 421         struct btree_trans trans;
 422         struct btree_iter *iter;
 423         struct bch_inode_unpacked u;
 424         struct bkey_s_c k;
 425         int ret;
 426
 427         mutex_lock(&c->sb_lock);
 428         bch2_sb_quota_read(c);
 429         mutex_unlock(&c->sb_lock);
 430
 431         for_each_set_qtype(c, i, q, qtypes) {
 432                 ret = bch2_quota_init_type(c, i);
 433                 if (ret)
 434                         return ret;
 435         }
 436
 437         bch2_trans_init(&trans, c, 0, 0);
 438
 439         for_each_btree_key(&trans, iter, BTREE_ID_inodes, POS_MIN,
 440                            BTREE_ITER_PREFETCH, k, ret) {
 441                 switch (k.k->type) {
 442                 case KEY_TYPE_inode:
 443                         ret = bch2_inode_unpack(bkey_s_c_to_inode(k), &u);
 444                         if (ret)
 445                                 return ret;
 446
 447                         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 448                                         KEY_TYPE_QUOTA_NOCHECK);
 449                         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 450                                         KEY_TYPE_QUOTA_NOCHECK);
 451                 }
 452         }
 453         bch2_trans_iter_put(&trans, iter);
 454
 455         return bch2_trans_exit(&trans) ?: ret;
 456 }
 457
 458 /* Enable/disable/delete quotas for an entire filesystem: */
 459
 460 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 461 {
 462         struct bch_fs *c = sb->s_fs_info;
 463
 464         if (sb->s_flags & SB_RDONLY)
 465                 return -EROFS;
 466
 467         /* Accounting must be enabled at mount time: */
 468         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 469                 return -EINVAL;
 470
 471         /* Can't enable enforcement without accounting: */
 472         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 473                 return -EINVAL;
 474
 475         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 476                 return -EINVAL;
 477
 478         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 479                 return -EINVAL;
 480
 481         mutex_lock(&c->sb_lock);
 482         if (uflags & FS_QUOTA_UDQ_ENFD)
 483                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
 484
 485         if (uflags & FS_QUOTA_GDQ_ENFD)
 486                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
 487
 488         if (uflags & FS_QUOTA_PDQ_ENFD)
 489                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
 490
 491         bch2_write_super(c);
 492         mutex_unlock(&c->sb_lock);
 493
 494         return 0;
 495 }
 496
 497 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 498 {
 499         struct bch_fs *c = sb->s_fs_info;
 500
 501         if (sb->s_flags & SB_RDONLY)
 502                 return -EROFS;
 503
 504         mutex_lock(&c->sb_lock);
 505         if (uflags & FS_QUOTA_UDQ_ENFD)
 506                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
 507
 508         if (uflags & FS_QUOTA_GDQ_ENFD)
 509                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
 510
 511         if (uflags & FS_QUOTA_PDQ_ENFD)
 512                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
 513
 514         bch2_write_super(c);
 515         mutex_unlock(&c->sb_lock);
 516
 517         return 0;
 518 }
 519
 520 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 521 {
 522         struct bch_fs *c = sb->s_fs_info;
 523         int ret;
 524
 525         if (sb->s_flags & SB_RDONLY)
 526                 return -EROFS;
 527
 528         if (uflags & FS_USER_QUOTA) {
 529                 if (c->opts.usrquota)
 530                         return -EINVAL;
 531
 532                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 533                                               POS(QTYP_USR, 0),
 534                                               POS(QTYP_USR + 1, 0),
 535                                               NULL);
 536                 if (ret)
 537                         return ret;
 538         }
 539
 540         if (uflags & FS_GROUP_QUOTA) {
 541                 if (c->opts.grpquota)
 542                         return -EINVAL;
 543
 544                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 545                                               POS(QTYP_GRP, 0),
 546                                               POS(QTYP_GRP + 1, 0),
 547                                               NULL);
 548                 if (ret)
 549                         return ret;
 550         }
 551
 552         if (uflags & FS_PROJ_QUOTA) {
 553                 if (c->opts.prjquota)
 554                         return -EINVAL;
 555
 556                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 557                                               POS(QTYP_PRJ, 0),
 558                                               POS(QTYP_PRJ + 1, 0),
 559                                               NULL);
 560                 if (ret)
 561                         return ret;
 562         }
 563
 564         return 0;
 565 }
 566
 567 /*
 568  * Return quota status information, such as enforcements, quota file inode
 569  * numbers etc.
 570  */
 571 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 572 {
 573         struct bch_fs *c = sb->s_fs_info;
 574         unsigned qtypes = enabled_qtypes(c);
 575         unsigned i;
 576
 577         memset(state, 0, sizeof(*state));
 578
 579         for (i = 0; i < QTYP_NR; i++) {
 580                 state->s_state[i].flags |= QCI_SYSFILE;
 581
 582                 if (!(qtypes & (1 << i)))
 583                         continue;
 584
 585                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 586
 587                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 588                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 589
 590                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 591                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 592         }
 593
 594         return 0;
 595 }
 596
 597 /*
 598  * Adjust quota timers & warnings
 599  */
 600 static int bch2_quota_set_info(struct super_block *sb, int type,
 601                                struct qc_info *info)
 602 {
 603         struct bch_fs *c = sb->s_fs_info;
 604         struct bch_sb_field_quota *sb_quota;
 605         struct bch_memquota_type *q;
 606
 607         if (sb->s_flags & SB_RDONLY)
 608                 return -EROFS;
 609
 610         if (type >= QTYP_NR)
 611                 return -EINVAL;
 612
 613         if (!((1 << type) & enabled_qtypes(c)))
 614                 return -ESRCH;
 615
 616         if (info->i_fieldmask &
 617             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 618                 return -EINVAL;
 619
 620         q = &c->quotas[type];
 621
 622         mutex_lock(&c->sb_lock);
 623         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 624         if (!sb_quota) {
 625                 sb_quota = bch2_sb_resize_quota(&c->disk_sb,
 626                                         sizeof(*sb_quota) / sizeof(u64));
 627                 if (!sb_quota)
 628                         return -ENOSPC;
 629         }
 630
 631         if (info->i_fieldmask & QC_SPC_TIMER)
 632                 sb_quota->q[type].c[Q_SPC].timelimit =
 633                         cpu_to_le32(info->i_spc_timelimit);
 634
 635         if (info->i_fieldmask & QC_SPC_WARNS)
 636                 sb_quota->q[type].c[Q_SPC].warnlimit =
 637                         cpu_to_le32(info->i_spc_warnlimit);
 638
 639         if (info->i_fieldmask & QC_INO_TIMER)
 640                 sb_quota->q[type].c[Q_INO].timelimit =
 641                         cpu_to_le32(info->i_ino_timelimit);
 642
 643         if (info->i_fieldmask & QC_INO_WARNS)
 644                 sb_quota->q[type].c[Q_INO].warnlimit =
 645                         cpu_to_le32(info->i_ino_warnlimit);
 646
 647         bch2_sb_quota_read(c);
 648
 649         bch2_write_super(c);
 650         mutex_unlock(&c->sb_lock);
 651
 652         return 0;
 653 }
 654
 655 /* Get/set individual quotas: */
 656
 657 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 658 {
 659         dst->d_space            = src->c[Q_SPC].v << 9;
 660         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 661         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 662         dst->d_spc_timer        = src->c[Q_SPC].timer;
 663         dst->d_spc_warns        = src->c[Q_SPC].warns;
 664
 665         dst->d_ino_count        = src->c[Q_INO].v;
 666         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 667         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 668         dst->d_ino_timer        = src->c[Q_INO].timer;
 669         dst->d_ino_warns        = src->c[Q_INO].warns;
 670 }
 671
 672 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 673                           struct qc_dqblk *qdq)
 674 {
 675         struct bch_fs *c                = sb->s_fs_info;
 676         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 677         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 678         struct bch_memquota *mq;
 679
 680         memset(qdq, 0, sizeof(*qdq));
 681
 682         mutex_lock(&q->lock);
 683         mq = genradix_ptr(&q->table, qid);
 684         if (mq)
 685                 __bch2_quota_get(qdq, mq);
 686         mutex_unlock(&q->lock);
 687
 688         return 0;
 689 }
 690
 691 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 692                                struct qc_dqblk *qdq)
 693 {
 694         struct bch_fs *c                = sb->s_fs_info;
 695         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 696         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 697         struct genradix_iter iter;
 698         struct bch_memquota *mq;
 699         int ret = 0;
 700
 701         mutex_lock(&q->lock);
 702
 703         genradix_for_each_from(&q->table, iter, mq, qid)
 704                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 705                         __bch2_quota_get(qdq, mq);
 706                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 707                         goto found;
 708                 }
 709
 710         ret = -ENOENT;
 711 found:
 712         mutex_unlock(&q->lock);
 713         return ret;
 714 }
 715
 716 static int bch2_set_quota_trans(struct btree_trans *trans,
 717                                 struct bkey_i_quota *new_quota,
 718                                 struct qc_dqblk *qdq)
 719 {
 720         struct btree_iter *iter;
 721         struct bkey_s_c k;
 722         int ret;
 723
 724         iter = bch2_trans_get_iter(trans, BTREE_ID_quotas, new_quota->k.p,
 725                                    BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 726         k = bch2_btree_iter_peek_slot(iter);
 727
 728         ret = bkey_err(k);
 729         if (unlikely(ret))
 730                 return ret;
 731
 732         if (k.k->type == KEY_TYPE_quota)
 733                 new_quota->v = *bkey_s_c_to_quota(k).v;
 734
 735         if (qdq->d_fieldmask & QC_SPC_SOFT)
 736                 new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 737         if (qdq->d_fieldmask & QC_SPC_HARD)
 738                 new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 739
 740         if (qdq->d_fieldmask & QC_INO_SOFT)
 741                 new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 742         if (qdq->d_fieldmask & QC_INO_HARD)
 743                 new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 744
 745         ret = bch2_trans_update(trans, iter, &new_quota->k_i, 0);
 746         bch2_trans_iter_put(trans, iter);
 747         return ret;
 748 }
 749
 750 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 751                           struct qc_dqblk *qdq)
 752 {
 753         struct bch_fs *c = sb->s_fs_info;
 754         struct bkey_i_quota new_quota;
 755         int ret;
 756
 757         if (sb->s_flags & SB_RDONLY)
 758                 return -EROFS;
 759
 760         bkey_quota_init(&new_quota.k_i);
 761         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 762
 763         ret = bch2_trans_do(c, NULL, NULL, 0,
 764                             bch2_set_quota_trans(&trans, &new_quota, qdq)) ?:
 765                 __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i));
 766
 767         return ret;
 768 }
 769
 770 const struct quotactl_ops bch2_quotactl_operations = {
 771         .quota_enable           = bch2_quota_enable,
 772         .quota_disable          = bch2_quota_disable,
 773         .rm_xquota              = bch2_quota_remove,
 774
 775         .get_state              = bch2_quota_get_state,
 776         .set_info               = bch2_quota_set_info,
 777
 778         .get_dqblk              = bch2_get_quota,
 779         .get_nextdqblk          = bch2_get_next_quota,
 780         .set_dqblk              = bch2_set_quota,
 781 };
 782
 783 #endif /* CONFIG_BCACHEFS_QUOTA */