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 "errcode.h"
   5 #include "inode.h"
   6 #include "quota.h"
   7 #include "subvolume.h"
   8 #include "super-io.h"
   9
  10 static const char * const bch2_quota_types[] = {
  11         "user",
  12         "group",
  13         "project",
  14 };
  15
  16 static const char * const bch2_quota_counters[] = {
  17         "space",
  18         "inodes",
  19 };
  20
  21 static int bch2_sb_quota_validate(struct bch_sb *sb, struct bch_sb_field *f,
  22                                   struct printbuf *err)
  23 {
  24         struct bch_sb_field_quota *q = field_to_type(f, quota);
  25
  26         if (vstruct_bytes(&q->field) < sizeof(*q)) {
  27                 prt_printf(err, "wrong size (got %zu should be %zu)",
  28                        vstruct_bytes(&q->field), sizeof(*q));
  29                 return -EINVAL;
  30         }
  31
  32         return 0;
  33 }
  34
  35 static void bch2_sb_quota_to_text(struct printbuf *out, struct bch_sb *sb,
  36                                   struct bch_sb_field *f)
  37 {
  38         struct bch_sb_field_quota *q = field_to_type(f, quota);
  39         unsigned qtyp, counter;
  40
  41         for (qtyp = 0; qtyp < ARRAY_SIZE(q->q); qtyp++) {
  42                 prt_printf(out, "%s: flags %llx",
  43                        bch2_quota_types[qtyp],
  44                        le64_to_cpu(q->q[qtyp].flags));
  45
  46                 for (counter = 0; counter < Q_COUNTERS; counter++)
  47                         prt_printf(out, " %s timelimit %u warnlimit %u",
  48                                bch2_quota_counters[counter],
  49                                le32_to_cpu(q->q[qtyp].c[counter].timelimit),
  50                                le32_to_cpu(q->q[qtyp].c[counter].warnlimit));
  51
  52                 prt_newline(out);
  53         }
  54 }
  55
  56 const struct bch_sb_field_ops bch_sb_field_ops_quota = {
  57         .validate       = bch2_sb_quota_validate,
  58         .to_text        = bch2_sb_quota_to_text,
  59 };
  60
  61 int bch2_quota_invalid(const struct bch_fs *c, struct bkey_s_c k,
  62                        int rw, struct printbuf *err)
  63 {
  64         if (k.k->p.inode >= QTYP_NR) {
  65                 prt_printf(err, "invalid quota type (%llu >= %u)",
  66                        k.k->p.inode, QTYP_NR);
  67                 return -EINVAL;
  68         }
  69
  70         if (bkey_val_bytes(k.k) != sizeof(struct bch_quota)) {
  71                 prt_printf(err, "incorrect value size (%zu != %zu)",
  72                        bkey_val_bytes(k.k), sizeof(struct bch_quota));
  73                 return -EINVAL;
  74         }
  75
  76         return 0;
  77 }
  78
  79 void bch2_quota_to_text(struct printbuf *out, struct bch_fs *c,
  80                         struct bkey_s_c k)
  81 {
  82         struct bkey_s_c_quota dq = bkey_s_c_to_quota(k);
  83         unsigned i;
  84
  85         for (i = 0; i < Q_COUNTERS; i++)
  86                 prt_printf(out, "%s hardlimit %llu softlimit %llu",
  87                        bch2_quota_counters[i],
  88                        le64_to_cpu(dq.v->c[i].hardlimit),
  89                        le64_to_cpu(dq.v->c[i].softlimit));
  90 }
  91
  92 #ifdef CONFIG_BCACHEFS_QUOTA
  93
  94 #include <linux/cred.h>
  95 #include <linux/fs.h>
  96 #include <linux/quota.h>
  97
  98 static void qc_info_to_text(struct printbuf *out, struct qc_info *i)
  99 {
 100         printbuf_tabstops_reset(out);
 101         printbuf_tabstop_push(out, 20);
 102
 103         prt_str(out, "i_fieldmask");
 104         prt_tab(out);
 105         prt_printf(out, "%x", i->i_fieldmask);
 106         prt_newline(out);
 107
 108         prt_str(out, "i_flags");
 109         prt_tab(out);
 110         prt_printf(out, "%u", i->i_flags);
 111         prt_newline(out);
 112
 113         prt_str(out, "i_spc_timelimit");
 114         prt_tab(out);
 115         prt_printf(out, "%u", i->i_spc_timelimit);
 116         prt_newline(out);
 117
 118         prt_str(out, "i_ino_timelimit");
 119         prt_tab(out);
 120         prt_printf(out, "%u", i->i_ino_timelimit);
 121         prt_newline(out);
 122
 123         prt_str(out, "i_rt_spc_timelimit");
 124         prt_tab(out);
 125         prt_printf(out, "%u", i->i_rt_spc_timelimit);
 126         prt_newline(out);
 127
 128         prt_str(out, "i_spc_warnlimit");
 129         prt_tab(out);
 130         prt_printf(out, "%u", i->i_spc_warnlimit);
 131         prt_newline(out);
 132
 133         prt_str(out, "i_ino_warnlimit");
 134         prt_tab(out);
 135         prt_printf(out, "%u", i->i_ino_warnlimit);
 136         prt_newline(out);
 137
 138         prt_str(out, "i_rt_spc_warnlimit");
 139         prt_tab(out);
 140         prt_printf(out, "%u", i->i_rt_spc_warnlimit);
 141         prt_newline(out);
 142 }
 143
 144 static void qc_dqblk_to_text(struct printbuf *out, struct qc_dqblk *q)
 145 {
 146         printbuf_tabstops_reset(out);
 147         printbuf_tabstop_push(out, 20);
 148
 149         prt_str(out, "d_fieldmask");
 150         prt_tab(out);
 151         prt_printf(out, "%x", q->d_fieldmask);
 152         prt_newline(out);
 153
 154         prt_str(out, "d_spc_hardlimit");
 155         prt_tab(out);
 156         prt_printf(out, "%llu", q->d_spc_hardlimit);
 157         prt_newline(out);
 158
 159         prt_str(out, "d_spc_softlimit");
 160         prt_tab(out);
 161         prt_printf(out, "%llu", q->d_spc_softlimit);
 162         prt_newline(out);
 163
 164         prt_str(out, "d_ino_hardlimit");
 165         prt_tab(out);
 166         prt_printf(out, "%llu", q->d_ino_hardlimit);
 167         prt_newline(out);
 168
 169         prt_str(out, "d_ino_softlimit");
 170         prt_tab(out);
 171         prt_printf(out, "%llu", q->d_ino_softlimit);
 172         prt_newline(out);
 173
 174         prt_str(out, "d_space");
 175         prt_tab(out);
 176         prt_printf(out, "%llu", q->d_space);
 177         prt_newline(out);
 178
 179         prt_str(out, "d_ino_count");
 180         prt_tab(out);
 181         prt_printf(out, "%llu", q->d_ino_count);
 182         prt_newline(out);
 183
 184         prt_str(out, "d_ino_timer");
 185         prt_tab(out);
 186         prt_printf(out, "%llu", q->d_ino_timer);
 187         prt_newline(out);
 188
 189         prt_str(out, "d_spc_timer");
 190         prt_tab(out);
 191         prt_printf(out, "%llu", q->d_spc_timer);
 192         prt_newline(out);
 193
 194         prt_str(out, "d_ino_warns");
 195         prt_tab(out);
 196         prt_printf(out, "%i", q->d_ino_warns);
 197         prt_newline(out);
 198
 199         prt_str(out, "d_spc_warns");
 200         prt_tab(out);
 201         prt_printf(out, "%i", q->d_spc_warns);
 202         prt_newline(out);
 203 }
 204
 205 static inline unsigned __next_qtype(unsigned i, unsigned qtypes)
 206 {
 207         qtypes >>= i;
 208         return qtypes ? i + __ffs(qtypes) : QTYP_NR;
 209 }
 210
 211 #define for_each_set_qtype(_c, _i, _q, _qtypes)                         \
 212         for (_i = 0;                                                    \
 213              (_i = __next_qtype(_i, _qtypes),                           \
 214               _q = &(_c)->quotas[_i],                                   \
 215               _i < QTYP_NR);                                            \
 216              _i++)
 217
 218 static bool ignore_hardlimit(struct bch_memquota_type *q)
 219 {
 220         if (capable(CAP_SYS_RESOURCE))
 221                 return true;
 222 #if 0
 223         struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
 224
 225         return capable(CAP_SYS_RESOURCE) &&
 226                (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
 227                 !(info->dqi_flags & DQF_ROOT_SQUASH));
 228 #endif
 229         return false;
 230 }
 231
 232 enum quota_msg {
 233         SOFTWARN,       /* Softlimit reached */
 234         SOFTLONGWARN,   /* Grace time expired */
 235         HARDWARN,       /* Hardlimit reached */
 236
 237         HARDBELOW,      /* Usage got below inode hardlimit */
 238         SOFTBELOW,      /* Usage got below inode softlimit */
 239 };
 240
 241 static int quota_nl[][Q_COUNTERS] = {
 242         [HARDWARN][Q_SPC]       = QUOTA_NL_BHARDWARN,
 243         [SOFTLONGWARN][Q_SPC]   = QUOTA_NL_BSOFTLONGWARN,
 244         [SOFTWARN][Q_SPC]       = QUOTA_NL_BSOFTWARN,
 245         [HARDBELOW][Q_SPC]      = QUOTA_NL_BHARDBELOW,
 246         [SOFTBELOW][Q_SPC]      = QUOTA_NL_BSOFTBELOW,
 247
 248         [HARDWARN][Q_INO]       = QUOTA_NL_IHARDWARN,
 249         [SOFTLONGWARN][Q_INO]   = QUOTA_NL_ISOFTLONGWARN,
 250         [SOFTWARN][Q_INO]       = QUOTA_NL_ISOFTWARN,
 251         [HARDBELOW][Q_INO]      = QUOTA_NL_IHARDBELOW,
 252         [SOFTBELOW][Q_INO]      = QUOTA_NL_ISOFTBELOW,
 253 };
 254
 255 struct quota_msgs {
 256         u8              nr;
 257         struct {
 258                 u8      qtype;
 259                 u8      msg;
 260         }               m[QTYP_NR * Q_COUNTERS];
 261 };
 262
 263 static void prepare_msg(unsigned qtype,
 264                         enum quota_counters counter,
 265                         struct quota_msgs *msgs,
 266                         enum quota_msg msg_type)
 267 {
 268         BUG_ON(msgs->nr >= ARRAY_SIZE(msgs->m));
 269
 270         msgs->m[msgs->nr].qtype = qtype;
 271         msgs->m[msgs->nr].msg   = quota_nl[msg_type][counter];
 272         msgs->nr++;
 273 }
 274
 275 static void prepare_warning(struct memquota_counter *qc,
 276                             unsigned qtype,
 277                             enum quota_counters counter,
 278                             struct quota_msgs *msgs,
 279                             enum quota_msg msg_type)
 280 {
 281         if (qc->warning_issued & (1 << msg_type))
 282                 return;
 283
 284         prepare_msg(qtype, counter, msgs, msg_type);
 285 }
 286
 287 static void flush_warnings(struct bch_qid qid,
 288                            struct super_block *sb,
 289                            struct quota_msgs *msgs)
 290 {
 291         unsigned i;
 292
 293         for (i = 0; i < msgs->nr; i++)
 294                 quota_send_warning(make_kqid(&init_user_ns, msgs->m[i].qtype, qid.q[i]),
 295                                    sb->s_dev, msgs->m[i].msg);
 296 }
 297
 298 static int bch2_quota_check_limit(struct bch_fs *c,
 299                                   unsigned qtype,
 300                                   struct bch_memquota *mq,
 301                                   struct quota_msgs *msgs,
 302                                   enum quota_counters counter,
 303                                   s64 v,
 304                                   enum quota_acct_mode mode)
 305 {
 306         struct bch_memquota_type *q = &c->quotas[qtype];
 307         struct memquota_counter *qc = &mq->c[counter];
 308         u64 n = qc->v + v;
 309
 310         BUG_ON((s64) n < 0);
 311
 312         if (mode == KEY_TYPE_QUOTA_NOCHECK)
 313                 return 0;
 314
 315         if (v <= 0) {
 316                 if (n < qc->hardlimit &&
 317                     (qc->warning_issued & (1 << HARDWARN))) {
 318                         qc->warning_issued &= ~(1 << HARDWARN);
 319                         prepare_msg(qtype, counter, msgs, HARDBELOW);
 320                 }
 321
 322                 if (n < qc->softlimit &&
 323                     (qc->warning_issued & (1 << SOFTWARN))) {
 324                         qc->warning_issued &= ~(1 << SOFTWARN);
 325                         prepare_msg(qtype, counter, msgs, SOFTBELOW);
 326                 }
 327
 328                 qc->warning_issued = 0;
 329                 return 0;
 330         }
 331
 332         if (qc->hardlimit &&
 333             qc->hardlimit < n &&
 334             !ignore_hardlimit(q)) {
 335                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 336                         return -EDQUOT;
 337
 338                 prepare_warning(qc, qtype, counter, msgs, HARDWARN);
 339         }
 340
 341         if (qc->softlimit &&
 342             qc->softlimit < n &&
 343             qc->timer &&
 344             ktime_get_real_seconds() >= qc->timer &&
 345             !ignore_hardlimit(q)) {
 346                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 347                         return -EDQUOT;
 348
 349                 prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
 350         }
 351
 352         if (qc->softlimit &&
 353             qc->softlimit < n &&
 354             qc->timer == 0) {
 355                 if (mode == KEY_TYPE_QUOTA_PREALLOC)
 356                         return -EDQUOT;
 357
 358                 prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
 359
 360                 /* XXX is this the right one? */
 361                 qc->timer = ktime_get_real_seconds() +
 362                         q->limits[counter].warnlimit;
 363         }
 364
 365         return 0;
 366 }
 367
 368 int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
 369                     enum quota_counters counter, s64 v,
 370                     enum quota_acct_mode mode)
 371 {
 372         unsigned qtypes = enabled_qtypes(c);
 373         struct bch_memquota_type *q;
 374         struct bch_memquota *mq[QTYP_NR];
 375         struct quota_msgs msgs;
 376         unsigned i;
 377         int ret = 0;
 378
 379         memset(&msgs, 0, sizeof(msgs));
 380
 381         for_each_set_qtype(c, i, q, qtypes)
 382                 mutex_lock_nested(&q->lock, i);
 383
 384         for_each_set_qtype(c, i, q, qtypes) {
 385                 mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_NOFS);
 386                 if (!mq[i]) {
 387                         ret = -ENOMEM;
 388                         goto err;
 389                 }
 390
 391                 ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
 392                 if (ret)
 393                         goto err;
 394         }
 395
 396         for_each_set_qtype(c, i, q, qtypes)
 397                 mq[i]->c[counter].v += v;
 398 err:
 399         for_each_set_qtype(c, i, q, qtypes)
 400                 mutex_unlock(&q->lock);
 401
 402         flush_warnings(qid, c->vfs_sb, &msgs);
 403
 404         return ret;
 405 }
 406
 407 static void __bch2_quota_transfer(struct bch_memquota *src_q,
 408                                   struct bch_memquota *dst_q,
 409                                   enum quota_counters counter, s64 v)
 410 {
 411         BUG_ON(v > src_q->c[counter].v);
 412         BUG_ON(v + dst_q->c[counter].v < v);
 413
 414         src_q->c[counter].v -= v;
 415         dst_q->c[counter].v += v;
 416 }
 417
 418 int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
 419                         struct bch_qid dst,
 420                         struct bch_qid src, u64 space,
 421                         enum quota_acct_mode mode)
 422 {
 423         struct bch_memquota_type *q;
 424         struct bch_memquota *src_q[3], *dst_q[3];
 425         struct quota_msgs msgs;
 426         unsigned i;
 427         int ret = 0;
 428
 429         qtypes &= enabled_qtypes(c);
 430
 431         memset(&msgs, 0, sizeof(msgs));
 432
 433         for_each_set_qtype(c, i, q, qtypes)
 434                 mutex_lock_nested(&q->lock, i);
 435
 436         for_each_set_qtype(c, i, q, qtypes) {
 437                 src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_NOFS);
 438                 dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_NOFS);
 439
 440                 if (!src_q[i] || !dst_q[i]) {
 441                         ret = -ENOMEM;
 442                         goto err;
 443                 }
 444
 445                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
 446                                              dst_q[i]->c[Q_SPC].v + space,
 447                                              mode);
 448                 if (ret)
 449                         goto err;
 450
 451                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
 452                                              dst_q[i]->c[Q_INO].v + 1,
 453                                              mode);
 454                 if (ret)
 455                         goto err;
 456         }
 457
 458         for_each_set_qtype(c, i, q, qtypes) {
 459                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
 460                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
 461         }
 462
 463 err:
 464         for_each_set_qtype(c, i, q, qtypes)
 465                 mutex_unlock(&q->lock);
 466
 467         flush_warnings(dst, c->vfs_sb, &msgs);
 468
 469         return ret;
 470 }
 471
 472 static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k)
 473 {
 474         struct bkey_s_c_quota dq;
 475         struct bch_memquota_type *q;
 476         struct bch_memquota *mq;
 477         unsigned i;
 478
 479         BUG_ON(k.k->p.inode >= QTYP_NR);
 480
 481         if (!((1U << k.k->p.inode) & enabled_qtypes(c)))
 482                 return 0;
 483
 484         switch (k.k->type) {
 485         case KEY_TYPE_quota:
 486                 dq = bkey_s_c_to_quota(k);
 487                 q = &c->quotas[k.k->p.inode];
 488
 489                 mutex_lock(&q->lock);
 490                 mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
 491                 if (!mq) {
 492                         mutex_unlock(&q->lock);
 493                         return -ENOMEM;
 494                 }
 495
 496                 for (i = 0; i < Q_COUNTERS; i++) {
 497                         mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
 498                         mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
 499                 }
 500
 501                 mutex_unlock(&q->lock);
 502         }
 503
 504         return 0;
 505 }
 506
 507 void bch2_fs_quota_exit(struct bch_fs *c)
 508 {
 509         unsigned i;
 510
 511         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 512                 genradix_free(&c->quotas[i].table);
 513 }
 514
 515 void bch2_fs_quota_init(struct bch_fs *c)
 516 {
 517         unsigned i;
 518
 519         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 520                 mutex_init(&c->quotas[i].lock);
 521 }
 522
 523 static struct bch_sb_field_quota *bch2_sb_get_or_create_quota(struct bch_sb_handle *sb)
 524 {
 525         struct bch_sb_field_quota *sb_quota = bch2_sb_get_quota(sb->sb);
 526
 527         if (sb_quota)
 528                 return sb_quota;
 529
 530         sb_quota = bch2_sb_resize_quota(sb, sizeof(*sb_quota) / sizeof(u64));
 531         if (sb_quota) {
 532                 unsigned qtype, qc;
 533
 534                 for (qtype = 0; qtype < QTYP_NR; qtype++)
 535                         for (qc = 0; qc < Q_COUNTERS; qc++)
 536                                 sb_quota->q[qtype].c[qc].timelimit =
 537                                         cpu_to_le32(7 * 24 * 60 * 60);
 538         }
 539
 540         return sb_quota;
 541 }
 542
 543 static void bch2_sb_quota_read(struct bch_fs *c)
 544 {
 545         struct bch_sb_field_quota *sb_quota;
 546         unsigned i, j;
 547
 548         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 549         if (!sb_quota)
 550                 return;
 551
 552         for (i = 0; i < QTYP_NR; i++) {
 553                 struct bch_memquota_type *q = &c->quotas[i];
 554
 555                 for (j = 0; j < Q_COUNTERS; j++) {
 556                         q->limits[j].timelimit =
 557                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 558                         q->limits[j].warnlimit =
 559                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 560                 }
 561         }
 562 }
 563
 564 static int bch2_fs_quota_read_inode(struct btree_trans *trans,
 565                                     struct btree_iter *iter,
 566                                     struct bkey_s_c k)
 567 {
 568         struct bch_fs *c = trans->c;
 569         struct bch_inode_unpacked u;
 570         struct bch_subvolume subvolume;
 571         int ret;
 572
 573         ret = bch2_snapshot_get_subvol(trans, k.k->p.snapshot, &subvolume);
 574         if (ret)
 575                 return ret;
 576
 577         /*
 578          * We don't do quota accounting in snapshots:
 579          */
 580         if (BCH_SUBVOLUME_SNAP(&subvolume))
 581                 goto advance;
 582
 583         if (!bkey_is_inode(k.k))
 584                 goto advance;
 585
 586         ret = bch2_inode_unpack(k, &u);
 587         if (ret)
 588                 return ret;
 589
 590         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 591                         KEY_TYPE_QUOTA_NOCHECK);
 592         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 593                         KEY_TYPE_QUOTA_NOCHECK);
 594 advance:
 595         bch2_btree_iter_set_pos(iter, POS(iter->pos.inode, iter->pos.offset + 1));
 596         return 0;
 597 }
 598
 599 int bch2_fs_quota_read(struct bch_fs *c)
 600 {
 601         struct bch_sb_field_quota *sb_quota;
 602         struct btree_trans trans;
 603         struct btree_iter iter;
 604         struct bkey_s_c k;
 605         int ret;
 606
 607         mutex_lock(&c->sb_lock);
 608         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 609         if (!sb_quota) {
 610                 mutex_unlock(&c->sb_lock);
 611                 return -BCH_ERR_ENOSPC_sb_quota;
 612         }
 613
 614         bch2_sb_quota_read(c);
 615         mutex_unlock(&c->sb_lock);
 616
 617         bch2_trans_init(&trans, c, 0, 0);
 618
 619         ret = for_each_btree_key2(&trans, iter, BTREE_ID_quotas,
 620                         POS_MIN, BTREE_ITER_PREFETCH, k,
 621                 __bch2_quota_set(c, k)) ?:
 622               for_each_btree_key2(&trans, iter, BTREE_ID_inodes,
 623                         POS_MIN, BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
 624                 bch2_fs_quota_read_inode(&trans, &iter, k));
 625         if (ret)
 626                 bch_err(c, "err in quota_read: %s", bch2_err_str(ret));
 627
 628         bch2_trans_exit(&trans);
 629         return ret;
 630 }
 631
 632 /* Enable/disable/delete quotas for an entire filesystem: */
 633
 634 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 635 {
 636         struct bch_fs *c = sb->s_fs_info;
 637         struct bch_sb_field_quota *sb_quota;
 638         int ret = 0;
 639
 640         if (sb->s_flags & SB_RDONLY)
 641                 return -EROFS;
 642
 643         /* Accounting must be enabled at mount time: */
 644         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 645                 return -EINVAL;
 646
 647         /* Can't enable enforcement without accounting: */
 648         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 649                 return -EINVAL;
 650
 651         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 652                 return -EINVAL;
 653
 654         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 655                 return -EINVAL;
 656
 657         mutex_lock(&c->sb_lock);
 658         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 659         if (!sb_quota) {
 660                 ret = -BCH_ERR_ENOSPC_sb_quota;
 661                 goto unlock;
 662         }
 663
 664         if (uflags & FS_QUOTA_UDQ_ENFD)
 665                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
 666
 667         if (uflags & FS_QUOTA_GDQ_ENFD)
 668                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
 669
 670         if (uflags & FS_QUOTA_PDQ_ENFD)
 671                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
 672
 673         bch2_write_super(c);
 674 unlock:
 675         mutex_unlock(&c->sb_lock);
 676
 677         return bch2_err_class(ret);
 678 }
 679
 680 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 681 {
 682         struct bch_fs *c = sb->s_fs_info;
 683
 684         if (sb->s_flags & SB_RDONLY)
 685                 return -EROFS;
 686
 687         mutex_lock(&c->sb_lock);
 688         if (uflags & FS_QUOTA_UDQ_ENFD)
 689                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
 690
 691         if (uflags & FS_QUOTA_GDQ_ENFD)
 692                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
 693
 694         if (uflags & FS_QUOTA_PDQ_ENFD)
 695                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
 696
 697         bch2_write_super(c);
 698         mutex_unlock(&c->sb_lock);
 699
 700         return 0;
 701 }
 702
 703 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 704 {
 705         struct bch_fs *c = sb->s_fs_info;
 706         int ret;
 707
 708         if (sb->s_flags & SB_RDONLY)
 709                 return -EROFS;
 710
 711         if (uflags & FS_USER_QUOTA) {
 712                 if (c->opts.usrquota)
 713                         return -EINVAL;
 714
 715                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 716                                               POS(QTYP_USR, 0),
 717                                               POS(QTYP_USR + 1, 0),
 718                                               0, NULL);
 719                 if (ret)
 720                         return ret;
 721         }
 722
 723         if (uflags & FS_GROUP_QUOTA) {
 724                 if (c->opts.grpquota)
 725                         return -EINVAL;
 726
 727                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 728                                               POS(QTYP_GRP, 0),
 729                                               POS(QTYP_GRP + 1, 0),
 730                                               0, NULL);
 731                 if (ret)
 732                         return ret;
 733         }
 734
 735         if (uflags & FS_PROJ_QUOTA) {
 736                 if (c->opts.prjquota)
 737                         return -EINVAL;
 738
 739                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 740                                               POS(QTYP_PRJ, 0),
 741                                               POS(QTYP_PRJ + 1, 0),
 742                                               0, NULL);
 743                 if (ret)
 744                         return ret;
 745         }
 746
 747         return 0;
 748 }
 749
 750 /*
 751  * Return quota status information, such as enforcements, quota file inode
 752  * numbers etc.
 753  */
 754 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 755 {
 756         struct bch_fs *c = sb->s_fs_info;
 757         unsigned qtypes = enabled_qtypes(c);
 758         unsigned i;
 759
 760         memset(state, 0, sizeof(*state));
 761
 762         for (i = 0; i < QTYP_NR; i++) {
 763                 state->s_state[i].flags |= QCI_SYSFILE;
 764
 765                 if (!(qtypes & (1 << i)))
 766                         continue;
 767
 768                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 769
 770                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 771                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 772
 773                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 774                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 775         }
 776
 777         return 0;
 778 }
 779
 780 /*
 781  * Adjust quota timers & warnings
 782  */
 783 static int bch2_quota_set_info(struct super_block *sb, int type,
 784                                struct qc_info *info)
 785 {
 786         struct bch_fs *c = sb->s_fs_info;
 787         struct bch_sb_field_quota *sb_quota;
 788         struct bch_memquota_type *q;
 789         int ret = 0;
 790
 791         if (0) {
 792                 struct printbuf buf = PRINTBUF;
 793
 794                 qc_info_to_text(&buf, info);
 795                 pr_info("setting:\n%s", buf.buf);
 796                 printbuf_exit(&buf);
 797         }
 798
 799         if (sb->s_flags & SB_RDONLY)
 800                 return -EROFS;
 801
 802         if (type >= QTYP_NR)
 803                 return -EINVAL;
 804
 805         if (!((1 << type) & enabled_qtypes(c)))
 806                 return -ESRCH;
 807
 808         if (info->i_fieldmask &
 809             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 810                 return -EINVAL;
 811
 812         q = &c->quotas[type];
 813
 814         mutex_lock(&c->sb_lock);
 815         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 816         if (!sb_quota) {
 817                 ret = -BCH_ERR_ENOSPC_sb_quota;
 818                 goto unlock;
 819         }
 820
 821         if (info->i_fieldmask & QC_SPC_TIMER)
 822                 sb_quota->q[type].c[Q_SPC].timelimit =
 823                         cpu_to_le32(info->i_spc_timelimit);
 824
 825         if (info->i_fieldmask & QC_SPC_WARNS)
 826                 sb_quota->q[type].c[Q_SPC].warnlimit =
 827                         cpu_to_le32(info->i_spc_warnlimit);
 828
 829         if (info->i_fieldmask & QC_INO_TIMER)
 830                 sb_quota->q[type].c[Q_INO].timelimit =
 831                         cpu_to_le32(info->i_ino_timelimit);
 832
 833         if (info->i_fieldmask & QC_INO_WARNS)
 834                 sb_quota->q[type].c[Q_INO].warnlimit =
 835                         cpu_to_le32(info->i_ino_warnlimit);
 836
 837         bch2_sb_quota_read(c);
 838
 839         bch2_write_super(c);
 840 unlock:
 841         mutex_unlock(&c->sb_lock);
 842
 843         return bch2_err_class(ret);
 844 }
 845
 846 /* Get/set individual quotas: */
 847
 848 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 849 {
 850         dst->d_space            = src->c[Q_SPC].v << 9;
 851         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 852         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 853         dst->d_spc_timer        = src->c[Q_SPC].timer;
 854         dst->d_spc_warns        = src->c[Q_SPC].warns;
 855
 856         dst->d_ino_count        = src->c[Q_INO].v;
 857         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 858         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 859         dst->d_ino_timer        = src->c[Q_INO].timer;
 860         dst->d_ino_warns        = src->c[Q_INO].warns;
 861 }
 862
 863 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 864                           struct qc_dqblk *qdq)
 865 {
 866         struct bch_fs *c                = sb->s_fs_info;
 867         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 868         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 869         struct bch_memquota *mq;
 870
 871         memset(qdq, 0, sizeof(*qdq));
 872
 873         mutex_lock(&q->lock);
 874         mq = genradix_ptr(&q->table, qid);
 875         if (mq)
 876                 __bch2_quota_get(qdq, mq);
 877         mutex_unlock(&q->lock);
 878
 879         return 0;
 880 }
 881
 882 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 883                                struct qc_dqblk *qdq)
 884 {
 885         struct bch_fs *c                = sb->s_fs_info;
 886         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 887         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 888         struct genradix_iter iter;
 889         struct bch_memquota *mq;
 890         int ret = 0;
 891
 892         mutex_lock(&q->lock);
 893
 894         genradix_for_each_from(&q->table, iter, mq, qid)
 895                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 896                         __bch2_quota_get(qdq, mq);
 897                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 898                         goto found;
 899                 }
 900
 901         ret = -ENOENT;
 902 found:
 903         mutex_unlock(&q->lock);
 904         return ret;
 905 }
 906
 907 static int bch2_set_quota_trans(struct btree_trans *trans,
 908                                 struct bkey_i_quota *new_quota,
 909                                 struct qc_dqblk *qdq)
 910 {
 911         struct btree_iter iter;
 912         struct bkey_s_c k;
 913         int ret;
 914
 915         bch2_trans_iter_init(trans, &iter, BTREE_ID_quotas, new_quota->k.p,
 916                              BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 917         k = bch2_btree_iter_peek_slot(&iter);
 918
 919         ret = bkey_err(k);
 920         if (unlikely(ret))
 921                 return ret;
 922
 923         if (k.k->type == KEY_TYPE_quota)
 924                 new_quota->v = *bkey_s_c_to_quota(k).v;
 925
 926         if (qdq->d_fieldmask & QC_SPC_SOFT)
 927                 new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 928         if (qdq->d_fieldmask & QC_SPC_HARD)
 929                 new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 930
 931         if (qdq->d_fieldmask & QC_INO_SOFT)
 932                 new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 933         if (qdq->d_fieldmask & QC_INO_HARD)
 934                 new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 935
 936         ret = bch2_trans_update(trans, &iter, &new_quota->k_i, 0);
 937         bch2_trans_iter_exit(trans, &iter);
 938         return ret;
 939 }
 940
 941 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 942                           struct qc_dqblk *qdq)
 943 {
 944         struct bch_fs *c = sb->s_fs_info;
 945         struct bkey_i_quota new_quota;
 946         int ret;
 947
 948         if (0) {
 949                 struct printbuf buf = PRINTBUF;
 950
 951                 qc_dqblk_to_text(&buf, qdq);
 952                 pr_info("setting:\n%s", buf.buf);
 953                 printbuf_exit(&buf);
 954         }
 955
 956         if (sb->s_flags & SB_RDONLY)
 957                 return -EROFS;
 958
 959         bkey_quota_init(&new_quota.k_i);
 960         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 961
 962         ret = bch2_trans_do(c, NULL, NULL, 0,
 963                             bch2_set_quota_trans(&trans, &new_quota, qdq)) ?:
 964                 __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i));
 965
 966         return ret;
 967 }
 968
 969 const struct quotactl_ops bch2_quotactl_operations = {
 970         .quota_enable           = bch2_quota_enable,
 971         .quota_disable          = bch2_quota_disable,
 972         .rm_xquota              = bch2_quota_remove,
 973
 974         .get_state              = bch2_quota_get_state,
 975         .set_info               = bch2_quota_set_info,
 976
 977         .get_dqblk              = bch2_get_quota,
 978         .get_nextdqblk          = bch2_get_next_quota,
 979         .set_dqblk              = bch2_set_quota,
 980 };
 981
 982 #endif /* CONFIG_BCACHEFS_QUOTA */