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                 prepare_warning(qc, qtype, counter, msgs, HARDWARN);
 336                 return -EDQUOT;
 337         }
 338
 339         if (qc->softlimit &&
 340             qc->softlimit < n) {
 341                 if (qc->timer == 0) {
 342                         qc->timer = ktime_get_real_seconds() + q->limits[counter].timelimit;
 343                         prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
 344                 } else if (ktime_get_real_seconds() >= qc->timer &&
 345                            !ignore_hardlimit(q)) {
 346                         prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
 347                         return -EDQUOT;
 348                 }
 349         }
 350
 351         return 0;
 352 }
 353
 354 int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
 355                     enum quota_counters counter, s64 v,
 356                     enum quota_acct_mode mode)
 357 {
 358         unsigned qtypes = enabled_qtypes(c);
 359         struct bch_memquota_type *q;
 360         struct bch_memquota *mq[QTYP_NR];
 361         struct quota_msgs msgs;
 362         unsigned i;
 363         int ret = 0;
 364
 365         memset(&msgs, 0, sizeof(msgs));
 366
 367         for_each_set_qtype(c, i, q, qtypes)
 368                 mutex_lock_nested(&q->lock, i);
 369
 370         for_each_set_qtype(c, i, q, qtypes) {
 371                 mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_NOFS);
 372                 if (!mq[i]) {
 373                         ret = -ENOMEM;
 374                         goto err;
 375                 }
 376
 377                 ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
 378                 if (ret)
 379                         goto err;
 380         }
 381
 382         for_each_set_qtype(c, i, q, qtypes)
 383                 mq[i]->c[counter].v += v;
 384 err:
 385         for_each_set_qtype(c, i, q, qtypes)
 386                 mutex_unlock(&q->lock);
 387
 388         flush_warnings(qid, c->vfs_sb, &msgs);
 389
 390         return ret;
 391 }
 392
 393 static void __bch2_quota_transfer(struct bch_memquota *src_q,
 394                                   struct bch_memquota *dst_q,
 395                                   enum quota_counters counter, s64 v)
 396 {
 397         BUG_ON(v > src_q->c[counter].v);
 398         BUG_ON(v + dst_q->c[counter].v < v);
 399
 400         src_q->c[counter].v -= v;
 401         dst_q->c[counter].v += v;
 402 }
 403
 404 int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
 405                         struct bch_qid dst,
 406                         struct bch_qid src, u64 space,
 407                         enum quota_acct_mode mode)
 408 {
 409         struct bch_memquota_type *q;
 410         struct bch_memquota *src_q[3], *dst_q[3];
 411         struct quota_msgs msgs;
 412         unsigned i;
 413         int ret = 0;
 414
 415         qtypes &= enabled_qtypes(c);
 416
 417         memset(&msgs, 0, sizeof(msgs));
 418
 419         for_each_set_qtype(c, i, q, qtypes)
 420                 mutex_lock_nested(&q->lock, i);
 421
 422         for_each_set_qtype(c, i, q, qtypes) {
 423                 src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_NOFS);
 424                 dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_NOFS);
 425
 426                 if (!src_q[i] || !dst_q[i]) {
 427                         ret = -ENOMEM;
 428                         goto err;
 429                 }
 430
 431                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
 432                                              dst_q[i]->c[Q_SPC].v + space,
 433                                              mode);
 434                 if (ret)
 435                         goto err;
 436
 437                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
 438                                              dst_q[i]->c[Q_INO].v + 1,
 439                                              mode);
 440                 if (ret)
 441                         goto err;
 442         }
 443
 444         for_each_set_qtype(c, i, q, qtypes) {
 445                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
 446                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
 447         }
 448
 449 err:
 450         for_each_set_qtype(c, i, q, qtypes)
 451                 mutex_unlock(&q->lock);
 452
 453         flush_warnings(dst, c->vfs_sb, &msgs);
 454
 455         return ret;
 456 }
 457
 458 static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k,
 459                             struct qc_dqblk *qdq)
 460 {
 461         struct bkey_s_c_quota dq;
 462         struct bch_memquota_type *q;
 463         struct bch_memquota *mq;
 464         unsigned i;
 465
 466         BUG_ON(k.k->p.inode >= QTYP_NR);
 467
 468         if (!((1U << k.k->p.inode) & enabled_qtypes(c)))
 469                 return 0;
 470
 471         switch (k.k->type) {
 472         case KEY_TYPE_quota:
 473                 dq = bkey_s_c_to_quota(k);
 474                 q = &c->quotas[k.k->p.inode];
 475
 476                 mutex_lock(&q->lock);
 477                 mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
 478                 if (!mq) {
 479                         mutex_unlock(&q->lock);
 480                         return -ENOMEM;
 481                 }
 482
 483                 for (i = 0; i < Q_COUNTERS; i++) {
 484                         mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
 485                         mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
 486                 }
 487
 488                 if (qdq && qdq->d_fieldmask & QC_SPC_TIMER)
 489                         mq->c[Q_SPC].timer      = cpu_to_le64(qdq->d_spc_timer);
 490                 if (qdq && qdq->d_fieldmask & QC_SPC_WARNS)
 491                         mq->c[Q_SPC].warns      = cpu_to_le64(qdq->d_spc_warns);
 492                 if (qdq && qdq->d_fieldmask & QC_INO_TIMER)
 493                         mq->c[Q_INO].timer      = cpu_to_le64(qdq->d_ino_timer);
 494                 if (qdq && qdq->d_fieldmask & QC_INO_WARNS)
 495                         mq->c[Q_INO].warns      = cpu_to_le64(qdq->d_ino_warns);
 496
 497                 mutex_unlock(&q->lock);
 498         }
 499
 500         return 0;
 501 }
 502
 503 void bch2_fs_quota_exit(struct bch_fs *c)
 504 {
 505         unsigned i;
 506
 507         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 508                 genradix_free(&c->quotas[i].table);
 509 }
 510
 511 void bch2_fs_quota_init(struct bch_fs *c)
 512 {
 513         unsigned i;
 514
 515         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 516                 mutex_init(&c->quotas[i].lock);
 517 }
 518
 519 static struct bch_sb_field_quota *bch2_sb_get_or_create_quota(struct bch_sb_handle *sb)
 520 {
 521         struct bch_sb_field_quota *sb_quota = bch2_sb_get_quota(sb->sb);
 522
 523         if (sb_quota)
 524                 return sb_quota;
 525
 526         sb_quota = bch2_sb_resize_quota(sb, sizeof(*sb_quota) / sizeof(u64));
 527         if (sb_quota) {
 528                 unsigned qtype, qc;
 529
 530                 for (qtype = 0; qtype < QTYP_NR; qtype++)
 531                         for (qc = 0; qc < Q_COUNTERS; qc++)
 532                                 sb_quota->q[qtype].c[qc].timelimit =
 533                                         cpu_to_le32(7 * 24 * 60 * 60);
 534         }
 535
 536         return sb_quota;
 537 }
 538
 539 static void bch2_sb_quota_read(struct bch_fs *c)
 540 {
 541         struct bch_sb_field_quota *sb_quota;
 542         unsigned i, j;
 543
 544         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 545         if (!sb_quota)
 546                 return;
 547
 548         for (i = 0; i < QTYP_NR; i++) {
 549                 struct bch_memquota_type *q = &c->quotas[i];
 550
 551                 for (j = 0; j < Q_COUNTERS; j++) {
 552                         q->limits[j].timelimit =
 553                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 554                         q->limits[j].warnlimit =
 555                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 556                 }
 557         }
 558 }
 559
 560 static int bch2_fs_quota_read_inode(struct btree_trans *trans,
 561                                     struct btree_iter *iter,
 562                                     struct bkey_s_c k)
 563 {
 564         struct bch_fs *c = trans->c;
 565         struct bch_inode_unpacked u;
 566         struct bch_subvolume subvolume;
 567         int ret;
 568
 569         ret = bch2_snapshot_get_subvol(trans, k.k->p.snapshot, &subvolume);
 570         if (ret)
 571                 return ret;
 572
 573         /*
 574          * We don't do quota accounting in snapshots:
 575          */
 576         if (BCH_SUBVOLUME_SNAP(&subvolume))
 577                 goto advance;
 578
 579         if (!bkey_is_inode(k.k))
 580                 goto advance;
 581
 582         ret = bch2_inode_unpack(k, &u);
 583         if (ret)
 584                 return ret;
 585
 586         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 587                         KEY_TYPE_QUOTA_NOCHECK);
 588         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 589                         KEY_TYPE_QUOTA_NOCHECK);
 590 advance:
 591         bch2_btree_iter_set_pos(iter, POS(iter->pos.inode, iter->pos.offset + 1));
 592         return 0;
 593 }
 594
 595 int bch2_fs_quota_read(struct bch_fs *c)
 596 {
 597         struct bch_sb_field_quota *sb_quota;
 598         struct btree_trans trans;
 599         struct btree_iter iter;
 600         struct bkey_s_c k;
 601         int ret;
 602
 603         mutex_lock(&c->sb_lock);
 604         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 605         if (!sb_quota) {
 606                 mutex_unlock(&c->sb_lock);
 607                 return -BCH_ERR_ENOSPC_sb_quota;
 608         }
 609
 610         bch2_sb_quota_read(c);
 611         mutex_unlock(&c->sb_lock);
 612
 613         bch2_trans_init(&trans, c, 0, 0);
 614
 615         ret = for_each_btree_key2(&trans, iter, BTREE_ID_quotas,
 616                         POS_MIN, BTREE_ITER_PREFETCH, k,
 617                 __bch2_quota_set(c, k, NULL)) ?:
 618               for_each_btree_key2(&trans, iter, BTREE_ID_inodes,
 619                         POS_MIN, BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
 620                 bch2_fs_quota_read_inode(&trans, &iter, k));
 621         if (ret)
 622                 bch_err(c, "err in quota_read: %s", bch2_err_str(ret));
 623
 624         bch2_trans_exit(&trans);
 625         return ret;
 626 }
 627
 628 /* Enable/disable/delete quotas for an entire filesystem: */
 629
 630 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 631 {
 632         struct bch_fs *c = sb->s_fs_info;
 633         struct bch_sb_field_quota *sb_quota;
 634         int ret = 0;
 635
 636         if (sb->s_flags & SB_RDONLY)
 637                 return -EROFS;
 638
 639         /* Accounting must be enabled at mount time: */
 640         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 641                 return -EINVAL;
 642
 643         /* Can't enable enforcement without accounting: */
 644         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 645                 return -EINVAL;
 646
 647         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 648                 return -EINVAL;
 649
 650         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 651                 return -EINVAL;
 652
 653         mutex_lock(&c->sb_lock);
 654         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 655         if (!sb_quota) {
 656                 ret = -BCH_ERR_ENOSPC_sb_quota;
 657                 goto unlock;
 658         }
 659
 660         if (uflags & FS_QUOTA_UDQ_ENFD)
 661                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
 662
 663         if (uflags & FS_QUOTA_GDQ_ENFD)
 664                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
 665
 666         if (uflags & FS_QUOTA_PDQ_ENFD)
 667                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
 668
 669         bch2_write_super(c);
 670 unlock:
 671         mutex_unlock(&c->sb_lock);
 672
 673         return bch2_err_class(ret);
 674 }
 675
 676 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 677 {
 678         struct bch_fs *c = sb->s_fs_info;
 679
 680         if (sb->s_flags & SB_RDONLY)
 681                 return -EROFS;
 682
 683         mutex_lock(&c->sb_lock);
 684         if (uflags & FS_QUOTA_UDQ_ENFD)
 685                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
 686
 687         if (uflags & FS_QUOTA_GDQ_ENFD)
 688                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
 689
 690         if (uflags & FS_QUOTA_PDQ_ENFD)
 691                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
 692
 693         bch2_write_super(c);
 694         mutex_unlock(&c->sb_lock);
 695
 696         return 0;
 697 }
 698
 699 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 700 {
 701         struct bch_fs *c = sb->s_fs_info;
 702         int ret;
 703
 704         if (sb->s_flags & SB_RDONLY)
 705                 return -EROFS;
 706
 707         if (uflags & FS_USER_QUOTA) {
 708                 if (c->opts.usrquota)
 709                         return -EINVAL;
 710
 711                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 712                                               POS(QTYP_USR, 0),
 713                                               POS(QTYP_USR + 1, 0),
 714                                               0, NULL);
 715                 if (ret)
 716                         return ret;
 717         }
 718
 719         if (uflags & FS_GROUP_QUOTA) {
 720                 if (c->opts.grpquota)
 721                         return -EINVAL;
 722
 723                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 724                                               POS(QTYP_GRP, 0),
 725                                               POS(QTYP_GRP + 1, 0),
 726                                               0, NULL);
 727                 if (ret)
 728                         return ret;
 729         }
 730
 731         if (uflags & FS_PROJ_QUOTA) {
 732                 if (c->opts.prjquota)
 733                         return -EINVAL;
 734
 735                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 736                                               POS(QTYP_PRJ, 0),
 737                                               POS(QTYP_PRJ + 1, 0),
 738                                               0, NULL);
 739                 if (ret)
 740                         return ret;
 741         }
 742
 743         return 0;
 744 }
 745
 746 /*
 747  * Return quota status information, such as enforcements, quota file inode
 748  * numbers etc.
 749  */
 750 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 751 {
 752         struct bch_fs *c = sb->s_fs_info;
 753         unsigned qtypes = enabled_qtypes(c);
 754         unsigned i;
 755
 756         memset(state, 0, sizeof(*state));
 757
 758         for (i = 0; i < QTYP_NR; i++) {
 759                 state->s_state[i].flags |= QCI_SYSFILE;
 760
 761                 if (!(qtypes & (1 << i)))
 762                         continue;
 763
 764                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 765
 766                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 767                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 768
 769                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 770                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 771         }
 772
 773         return 0;
 774 }
 775
 776 /*
 777  * Adjust quota timers & warnings
 778  */
 779 static int bch2_quota_set_info(struct super_block *sb, int type,
 780                                struct qc_info *info)
 781 {
 782         struct bch_fs *c = sb->s_fs_info;
 783         struct bch_sb_field_quota *sb_quota;
 784         struct bch_memquota_type *q;
 785         int ret = 0;
 786
 787         if (0) {
 788                 struct printbuf buf = PRINTBUF;
 789
 790                 qc_info_to_text(&buf, info);
 791                 pr_info("setting:\n%s", buf.buf);
 792                 printbuf_exit(&buf);
 793         }
 794
 795         if (sb->s_flags & SB_RDONLY)
 796                 return -EROFS;
 797
 798         if (type >= QTYP_NR)
 799                 return -EINVAL;
 800
 801         if (!((1 << type) & enabled_qtypes(c)))
 802                 return -ESRCH;
 803
 804         if (info->i_fieldmask &
 805             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 806                 return -EINVAL;
 807
 808         q = &c->quotas[type];
 809
 810         mutex_lock(&c->sb_lock);
 811         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 812         if (!sb_quota) {
 813                 ret = -BCH_ERR_ENOSPC_sb_quota;
 814                 goto unlock;
 815         }
 816
 817         if (info->i_fieldmask & QC_SPC_TIMER)
 818                 sb_quota->q[type].c[Q_SPC].timelimit =
 819                         cpu_to_le32(info->i_spc_timelimit);
 820
 821         if (info->i_fieldmask & QC_SPC_WARNS)
 822                 sb_quota->q[type].c[Q_SPC].warnlimit =
 823                         cpu_to_le32(info->i_spc_warnlimit);
 824
 825         if (info->i_fieldmask & QC_INO_TIMER)
 826                 sb_quota->q[type].c[Q_INO].timelimit =
 827                         cpu_to_le32(info->i_ino_timelimit);
 828
 829         if (info->i_fieldmask & QC_INO_WARNS)
 830                 sb_quota->q[type].c[Q_INO].warnlimit =
 831                         cpu_to_le32(info->i_ino_warnlimit);
 832
 833         bch2_sb_quota_read(c);
 834
 835         bch2_write_super(c);
 836 unlock:
 837         mutex_unlock(&c->sb_lock);
 838
 839         return bch2_err_class(ret);
 840 }
 841
 842 /* Get/set individual quotas: */
 843
 844 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 845 {
 846         dst->d_space            = src->c[Q_SPC].v << 9;
 847         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 848         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 849         dst->d_spc_timer        = src->c[Q_SPC].timer;
 850         dst->d_spc_warns        = src->c[Q_SPC].warns;
 851
 852         dst->d_ino_count        = src->c[Q_INO].v;
 853         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 854         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 855         dst->d_ino_timer        = src->c[Q_INO].timer;
 856         dst->d_ino_warns        = src->c[Q_INO].warns;
 857 }
 858
 859 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 860                           struct qc_dqblk *qdq)
 861 {
 862         struct bch_fs *c                = sb->s_fs_info;
 863         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 864         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 865         struct bch_memquota *mq;
 866
 867         memset(qdq, 0, sizeof(*qdq));
 868
 869         mutex_lock(&q->lock);
 870         mq = genradix_ptr(&q->table, qid);
 871         if (mq)
 872                 __bch2_quota_get(qdq, mq);
 873         mutex_unlock(&q->lock);
 874
 875         return 0;
 876 }
 877
 878 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 879                                struct qc_dqblk *qdq)
 880 {
 881         struct bch_fs *c                = sb->s_fs_info;
 882         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 883         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 884         struct genradix_iter iter;
 885         struct bch_memquota *mq;
 886         int ret = 0;
 887
 888         mutex_lock(&q->lock);
 889
 890         genradix_for_each_from(&q->table, iter, mq, qid)
 891                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 892                         __bch2_quota_get(qdq, mq);
 893                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 894                         goto found;
 895                 }
 896
 897         ret = -ENOENT;
 898 found:
 899         mutex_unlock(&q->lock);
 900         return ret;
 901 }
 902
 903 static int bch2_set_quota_trans(struct btree_trans *trans,
 904                                 struct bkey_i_quota *new_quota,
 905                                 struct qc_dqblk *qdq)
 906 {
 907         struct btree_iter iter;
 908         struct bkey_s_c k;
 909         int ret;
 910
 911         bch2_trans_iter_init(trans, &iter, BTREE_ID_quotas, new_quota->k.p,
 912                              BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 913         k = bch2_btree_iter_peek_slot(&iter);
 914
 915         ret = bkey_err(k);
 916         if (unlikely(ret))
 917                 return ret;
 918
 919         if (k.k->type == KEY_TYPE_quota)
 920                 new_quota->v = *bkey_s_c_to_quota(k).v;
 921
 922         if (qdq->d_fieldmask & QC_SPC_SOFT)
 923                 new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 924         if (qdq->d_fieldmask & QC_SPC_HARD)
 925                 new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 926
 927         if (qdq->d_fieldmask & QC_INO_SOFT)
 928                 new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 929         if (qdq->d_fieldmask & QC_INO_HARD)
 930                 new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 931
 932         ret = bch2_trans_update(trans, &iter, &new_quota->k_i, 0);
 933         bch2_trans_iter_exit(trans, &iter);
 934         return ret;
 935 }
 936
 937 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 938                           struct qc_dqblk *qdq)
 939 {
 940         struct bch_fs *c = sb->s_fs_info;
 941         struct bkey_i_quota new_quota;
 942         int ret;
 943
 944         if (0) {
 945                 struct printbuf buf = PRINTBUF;
 946
 947                 qc_dqblk_to_text(&buf, qdq);
 948                 pr_info("setting:\n%s", buf.buf);
 949                 printbuf_exit(&buf);
 950         }
 951
 952         if (sb->s_flags & SB_RDONLY)
 953                 return -EROFS;
 954
 955         bkey_quota_init(&new_quota.k_i);
 956         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 957
 958         ret = bch2_trans_do(c, NULL, NULL, 0,
 959                             bch2_set_quota_trans(&trans, &new_quota, qdq)) ?:
 960                 __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i), qdq);
 961
 962         return ret;
 963 }
 964
 965 const struct quotactl_ops bch2_quotactl_operations = {
 966         .quota_enable           = bch2_quota_enable,
 967         .quota_disable          = bch2_quota_disable,
 968         .rm_xquota              = bch2_quota_remove,
 969
 970         .get_state              = bch2_quota_get_state,
 971         .set_info               = bch2_quota_set_info,
 972
 973         .get_dqblk              = bch2_get_quota,
 974         .get_nextdqblk          = bch2_get_next_quota,
 975         .set_dqblk              = bch2_set_quota,
 976 };
 977
 978 #endif /* CONFIG_BCACHEFS_QUOTA */