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 "error.h"
   6 #include "inode.h"
   7 #include "quota.h"
   8 #include "subvolume.h"
   9 #include "super-io.h"
  10
  11 static const char * const bch2_quota_types[] = {
  12         "user",
  13         "group",
  14         "project",
  15 };
  16
  17 static const char * const bch2_quota_counters[] = {
  18         "space",
  19         "inodes",
  20 };
  21
  22 static int bch2_sb_quota_validate(struct bch_sb *sb, struct bch_sb_field *f,
  23                                   struct printbuf *err)
  24 {
  25         struct bch_sb_field_quota *q = field_to_type(f, quota);
  26
  27         if (vstruct_bytes(&q->field) < sizeof(*q)) {
  28                 prt_printf(err, "wrong size (got %zu should be %zu)",
  29                        vstruct_bytes(&q->field), sizeof(*q));
  30                 return -BCH_ERR_invalid_sb_quota;
  31         }
  32
  33         return 0;
  34 }
  35
  36 static void bch2_sb_quota_to_text(struct printbuf *out, struct bch_sb *sb,
  37                                   struct bch_sb_field *f)
  38 {
  39         struct bch_sb_field_quota *q = field_to_type(f, quota);
  40         unsigned qtyp, counter;
  41
  42         for (qtyp = 0; qtyp < ARRAY_SIZE(q->q); qtyp++) {
  43                 prt_printf(out, "%s: flags %llx",
  44                        bch2_quota_types[qtyp],
  45                        le64_to_cpu(q->q[qtyp].flags));
  46
  47                 for (counter = 0; counter < Q_COUNTERS; counter++)
  48                         prt_printf(out, " %s timelimit %u warnlimit %u",
  49                                bch2_quota_counters[counter],
  50                                le32_to_cpu(q->q[qtyp].c[counter].timelimit),
  51                                le32_to_cpu(q->q[qtyp].c[counter].warnlimit));
  52
  53                 prt_newline(out);
  54         }
  55 }
  56
  57 const struct bch_sb_field_ops bch_sb_field_ops_quota = {
  58         .validate       = bch2_sb_quota_validate,
  59         .to_text        = bch2_sb_quota_to_text,
  60 };
  61
  62 int bch2_quota_invalid(const struct bch_fs *c, struct bkey_s_c k,
  63                        unsigned flags, struct printbuf *err)
  64 {
  65         if (k.k->p.inode >= QTYP_NR) {
  66                 prt_printf(err, "invalid quota type (%llu >= %u)",
  67                        k.k->p.inode, QTYP_NR);
  68                 return -BCH_ERR_invalid_bkey;
  69         }
  70
  71         return 0;
  72 }
  73
  74 void bch2_quota_to_text(struct printbuf *out, struct bch_fs *c,
  75                         struct bkey_s_c k)
  76 {
  77         struct bkey_s_c_quota dq = bkey_s_c_to_quota(k);
  78         unsigned i;
  79
  80         for (i = 0; i < Q_COUNTERS; i++)
  81                 prt_printf(out, "%s hardlimit %llu softlimit %llu",
  82                        bch2_quota_counters[i],
  83                        le64_to_cpu(dq.v->c[i].hardlimit),
  84                        le64_to_cpu(dq.v->c[i].softlimit));
  85 }
  86
  87 #ifdef CONFIG_BCACHEFS_QUOTA
  88
  89 #include <linux/cred.h>
  90 #include <linux/fs.h>
  91 #include <linux/quota.h>
  92
  93 static void qc_info_to_text(struct printbuf *out, struct qc_info *i)
  94 {
  95         printbuf_tabstops_reset(out);
  96         printbuf_tabstop_push(out, 20);
  97
  98         prt_str(out, "i_fieldmask");
  99         prt_tab(out);
 100         prt_printf(out, "%x", i->i_fieldmask);
 101         prt_newline(out);
 102
 103         prt_str(out, "i_flags");
 104         prt_tab(out);
 105         prt_printf(out, "%u", i->i_flags);
 106         prt_newline(out);
 107
 108         prt_str(out, "i_spc_timelimit");
 109         prt_tab(out);
 110         prt_printf(out, "%u", i->i_spc_timelimit);
 111         prt_newline(out);
 112
 113         prt_str(out, "i_ino_timelimit");
 114         prt_tab(out);
 115         prt_printf(out, "%u", i->i_ino_timelimit);
 116         prt_newline(out);
 117
 118         prt_str(out, "i_rt_spc_timelimit");
 119         prt_tab(out);
 120         prt_printf(out, "%u", i->i_rt_spc_timelimit);
 121         prt_newline(out);
 122
 123         prt_str(out, "i_spc_warnlimit");
 124         prt_tab(out);
 125         prt_printf(out, "%u", i->i_spc_warnlimit);
 126         prt_newline(out);
 127
 128         prt_str(out, "i_ino_warnlimit");
 129         prt_tab(out);
 130         prt_printf(out, "%u", i->i_ino_warnlimit);
 131         prt_newline(out);
 132
 133         prt_str(out, "i_rt_spc_warnlimit");
 134         prt_tab(out);
 135         prt_printf(out, "%u", i->i_rt_spc_warnlimit);
 136         prt_newline(out);
 137 }
 138
 139 static void qc_dqblk_to_text(struct printbuf *out, struct qc_dqblk *q)
 140 {
 141         printbuf_tabstops_reset(out);
 142         printbuf_tabstop_push(out, 20);
 143
 144         prt_str(out, "d_fieldmask");
 145         prt_tab(out);
 146         prt_printf(out, "%x", q->d_fieldmask);
 147         prt_newline(out);
 148
 149         prt_str(out, "d_spc_hardlimit");
 150         prt_tab(out);
 151         prt_printf(out, "%llu", q->d_spc_hardlimit);
 152         prt_newline(out);
 153
 154         prt_str(out, "d_spc_softlimit");
 155         prt_tab(out);
 156         prt_printf(out, "%llu", q->d_spc_softlimit);
 157         prt_newline(out);
 158
 159         prt_str(out, "d_ino_hardlimit");
 160         prt_tab(out);
 161         prt_printf(out, "%llu", q->d_ino_hardlimit);
 162         prt_newline(out);
 163
 164         prt_str(out, "d_ino_softlimit");
 165         prt_tab(out);
 166         prt_printf(out, "%llu", q->d_ino_softlimit);
 167         prt_newline(out);
 168
 169         prt_str(out, "d_space");
 170         prt_tab(out);
 171         prt_printf(out, "%llu", q->d_space);
 172         prt_newline(out);
 173
 174         prt_str(out, "d_ino_count");
 175         prt_tab(out);
 176         prt_printf(out, "%llu", q->d_ino_count);
 177         prt_newline(out);
 178
 179         prt_str(out, "d_ino_timer");
 180         prt_tab(out);
 181         prt_printf(out, "%llu", q->d_ino_timer);
 182         prt_newline(out);
 183
 184         prt_str(out, "d_spc_timer");
 185         prt_tab(out);
 186         prt_printf(out, "%llu", q->d_spc_timer);
 187         prt_newline(out);
 188
 189         prt_str(out, "d_ino_warns");
 190         prt_tab(out);
 191         prt_printf(out, "%i", q->d_ino_warns);
 192         prt_newline(out);
 193
 194         prt_str(out, "d_spc_warns");
 195         prt_tab(out);
 196         prt_printf(out, "%i", q->d_spc_warns);
 197         prt_newline(out);
 198 }
 199
 200 static inline unsigned __next_qtype(unsigned i, unsigned qtypes)
 201 {
 202         qtypes >>= i;
 203         return qtypes ? i + __ffs(qtypes) : QTYP_NR;
 204 }
 205
 206 #define for_each_set_qtype(_c, _i, _q, _qtypes)                         \
 207         for (_i = 0;                                                    \
 208              (_i = __next_qtype(_i, _qtypes),                           \
 209               _q = &(_c)->quotas[_i],                                   \
 210               _i < QTYP_NR);                                            \
 211              _i++)
 212
 213 static bool ignore_hardlimit(struct bch_memquota_type *q)
 214 {
 215         if (capable(CAP_SYS_RESOURCE))
 216                 return true;
 217 #if 0
 218         struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
 219
 220         return capable(CAP_SYS_RESOURCE) &&
 221                (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
 222                 !(info->dqi_flags & DQF_ROOT_SQUASH));
 223 #endif
 224         return false;
 225 }
 226
 227 enum quota_msg {
 228         SOFTWARN,       /* Softlimit reached */
 229         SOFTLONGWARN,   /* Grace time expired */
 230         HARDWARN,       /* Hardlimit reached */
 231
 232         HARDBELOW,      /* Usage got below inode hardlimit */
 233         SOFTBELOW,      /* Usage got below inode softlimit */
 234 };
 235
 236 static int quota_nl[][Q_COUNTERS] = {
 237         [HARDWARN][Q_SPC]       = QUOTA_NL_BHARDWARN,
 238         [SOFTLONGWARN][Q_SPC]   = QUOTA_NL_BSOFTLONGWARN,
 239         [SOFTWARN][Q_SPC]       = QUOTA_NL_BSOFTWARN,
 240         [HARDBELOW][Q_SPC]      = QUOTA_NL_BHARDBELOW,
 241         [SOFTBELOW][Q_SPC]      = QUOTA_NL_BSOFTBELOW,
 242
 243         [HARDWARN][Q_INO]       = QUOTA_NL_IHARDWARN,
 244         [SOFTLONGWARN][Q_INO]   = QUOTA_NL_ISOFTLONGWARN,
 245         [SOFTWARN][Q_INO]       = QUOTA_NL_ISOFTWARN,
 246         [HARDBELOW][Q_INO]      = QUOTA_NL_IHARDBELOW,
 247         [SOFTBELOW][Q_INO]      = QUOTA_NL_ISOFTBELOW,
 248 };
 249
 250 struct quota_msgs {
 251         u8              nr;
 252         struct {
 253                 u8      qtype;
 254                 u8      msg;
 255         }               m[QTYP_NR * Q_COUNTERS];
 256 };
 257
 258 static void prepare_msg(unsigned qtype,
 259                         enum quota_counters counter,
 260                         struct quota_msgs *msgs,
 261                         enum quota_msg msg_type)
 262 {
 263         BUG_ON(msgs->nr >= ARRAY_SIZE(msgs->m));
 264
 265         msgs->m[msgs->nr].qtype = qtype;
 266         msgs->m[msgs->nr].msg   = quota_nl[msg_type][counter];
 267         msgs->nr++;
 268 }
 269
 270 static void prepare_warning(struct memquota_counter *qc,
 271                             unsigned qtype,
 272                             enum quota_counters counter,
 273                             struct quota_msgs *msgs,
 274                             enum quota_msg msg_type)
 275 {
 276         if (qc->warning_issued & (1 << msg_type))
 277                 return;
 278
 279         prepare_msg(qtype, counter, msgs, msg_type);
 280 }
 281
 282 static void flush_warnings(struct bch_qid qid,
 283                            struct super_block *sb,
 284                            struct quota_msgs *msgs)
 285 {
 286         unsigned i;
 287
 288         for (i = 0; i < msgs->nr; i++)
 289                 quota_send_warning(make_kqid(&init_user_ns, msgs->m[i].qtype, qid.q[i]),
 290                                    sb->s_dev, msgs->m[i].msg);
 291 }
 292
 293 static int bch2_quota_check_limit(struct bch_fs *c,
 294                                   unsigned qtype,
 295                                   struct bch_memquota *mq,
 296                                   struct quota_msgs *msgs,
 297                                   enum quota_counters counter,
 298                                   s64 v,
 299                                   enum quota_acct_mode mode)
 300 {
 301         struct bch_memquota_type *q = &c->quotas[qtype];
 302         struct memquota_counter *qc = &mq->c[counter];
 303         u64 n = qc->v + v;
 304
 305         BUG_ON((s64) n < 0);
 306
 307         if (mode == KEY_TYPE_QUOTA_NOCHECK)
 308                 return 0;
 309
 310         if (v <= 0) {
 311                 if (n < qc->hardlimit &&
 312                     (qc->warning_issued & (1 << HARDWARN))) {
 313                         qc->warning_issued &= ~(1 << HARDWARN);
 314                         prepare_msg(qtype, counter, msgs, HARDBELOW);
 315                 }
 316
 317                 if (n < qc->softlimit &&
 318                     (qc->warning_issued & (1 << SOFTWARN))) {
 319                         qc->warning_issued &= ~(1 << SOFTWARN);
 320                         prepare_msg(qtype, counter, msgs, SOFTBELOW);
 321                 }
 322
 323                 qc->warning_issued = 0;
 324                 return 0;
 325         }
 326
 327         if (qc->hardlimit &&
 328             qc->hardlimit < n &&
 329             !ignore_hardlimit(q)) {
 330                 prepare_warning(qc, qtype, counter, msgs, HARDWARN);
 331                 return -EDQUOT;
 332         }
 333
 334         if (qc->softlimit &&
 335             qc->softlimit < n) {
 336                 if (qc->timer == 0) {
 337                         qc->timer = ktime_get_real_seconds() + q->limits[counter].timelimit;
 338                         prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
 339                 } else if (ktime_get_real_seconds() >= qc->timer &&
 340                            !ignore_hardlimit(q)) {
 341                         prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
 342                         return -EDQUOT;
 343                 }
 344         }
 345
 346         return 0;
 347 }
 348
 349 int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
 350                     enum quota_counters counter, s64 v,
 351                     enum quota_acct_mode mode)
 352 {
 353         unsigned qtypes = enabled_qtypes(c);
 354         struct bch_memquota_type *q;
 355         struct bch_memquota *mq[QTYP_NR];
 356         struct quota_msgs msgs;
 357         unsigned i;
 358         int ret = 0;
 359
 360         memset(&msgs, 0, sizeof(msgs));
 361
 362         for_each_set_qtype(c, i, q, qtypes) {
 363                 mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_KERNEL);
 364                 if (!mq[i])
 365                         return -ENOMEM;
 366         }
 367
 368         for_each_set_qtype(c, i, q, qtypes)
 369                 mutex_lock_nested(&q->lock, i);
 370
 371         for_each_set_qtype(c, i, q, qtypes) {
 372                 ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
 373                 if (ret)
 374                         goto err;
 375         }
 376
 377         for_each_set_qtype(c, i, q, qtypes)
 378                 mq[i]->c[counter].v += v;
 379 err:
 380         for_each_set_qtype(c, i, q, qtypes)
 381                 mutex_unlock(&q->lock);
 382
 383         flush_warnings(qid, c->vfs_sb, &msgs);
 384
 385         return ret;
 386 }
 387
 388 static void __bch2_quota_transfer(struct bch_memquota *src_q,
 389                                   struct bch_memquota *dst_q,
 390                                   enum quota_counters counter, s64 v)
 391 {
 392         BUG_ON(v > src_q->c[counter].v);
 393         BUG_ON(v + dst_q->c[counter].v < v);
 394
 395         src_q->c[counter].v -= v;
 396         dst_q->c[counter].v += v;
 397 }
 398
 399 int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
 400                         struct bch_qid dst,
 401                         struct bch_qid src, u64 space,
 402                         enum quota_acct_mode mode)
 403 {
 404         struct bch_memquota_type *q;
 405         struct bch_memquota *src_q[3], *dst_q[3];
 406         struct quota_msgs msgs;
 407         unsigned i;
 408         int ret = 0;
 409
 410         qtypes &= enabled_qtypes(c);
 411
 412         memset(&msgs, 0, sizeof(msgs));
 413
 414         for_each_set_qtype(c, i, q, qtypes) {
 415                 src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_KERNEL);
 416                 dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_KERNEL);
 417                 if (!src_q[i] || !dst_q[i])
 418                         return -ENOMEM;
 419         }
 420
 421         for_each_set_qtype(c, i, q, qtypes)
 422                 mutex_lock_nested(&q->lock, i);
 423
 424         for_each_set_qtype(c, i, q, qtypes) {
 425                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
 426                                              dst_q[i]->c[Q_SPC].v + space,
 427                                              mode);
 428                 if (ret)
 429                         goto err;
 430
 431                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
 432                                              dst_q[i]->c[Q_INO].v + 1,
 433                                              mode);
 434                 if (ret)
 435                         goto err;
 436         }
 437
 438         for_each_set_qtype(c, i, q, qtypes) {
 439                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
 440                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
 441         }
 442
 443 err:
 444         for_each_set_qtype(c, i, q, qtypes)
 445                 mutex_unlock(&q->lock);
 446
 447         flush_warnings(dst, c->vfs_sb, &msgs);
 448
 449         return ret;
 450 }
 451
 452 static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k,
 453                             struct qc_dqblk *qdq)
 454 {
 455         struct bkey_s_c_quota dq;
 456         struct bch_memquota_type *q;
 457         struct bch_memquota *mq;
 458         unsigned i;
 459
 460         BUG_ON(k.k->p.inode >= QTYP_NR);
 461
 462         if (!((1U << k.k->p.inode) & enabled_qtypes(c)))
 463                 return 0;
 464
 465         switch (k.k->type) {
 466         case KEY_TYPE_quota:
 467                 dq = bkey_s_c_to_quota(k);
 468                 q = &c->quotas[k.k->p.inode];
 469
 470                 mutex_lock(&q->lock);
 471                 mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
 472                 if (!mq) {
 473                         mutex_unlock(&q->lock);
 474                         return -ENOMEM;
 475                 }
 476
 477                 for (i = 0; i < Q_COUNTERS; i++) {
 478                         mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
 479                         mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
 480                 }
 481
 482                 if (qdq && qdq->d_fieldmask & QC_SPC_TIMER)
 483                         mq->c[Q_SPC].timer      = cpu_to_le64(qdq->d_spc_timer);
 484                 if (qdq && qdq->d_fieldmask & QC_SPC_WARNS)
 485                         mq->c[Q_SPC].warns      = cpu_to_le64(qdq->d_spc_warns);
 486                 if (qdq && qdq->d_fieldmask & QC_INO_TIMER)
 487                         mq->c[Q_INO].timer      = cpu_to_le64(qdq->d_ino_timer);
 488                 if (qdq && qdq->d_fieldmask & QC_INO_WARNS)
 489                         mq->c[Q_INO].warns      = cpu_to_le64(qdq->d_ino_warns);
 490
 491                 mutex_unlock(&q->lock);
 492         }
 493
 494         return 0;
 495 }
 496
 497 void bch2_fs_quota_exit(struct bch_fs *c)
 498 {
 499         unsigned i;
 500
 501         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 502                 genradix_free(&c->quotas[i].table);
 503 }
 504
 505 void bch2_fs_quota_init(struct bch_fs *c)
 506 {
 507         unsigned i;
 508
 509         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 510                 mutex_init(&c->quotas[i].lock);
 511 }
 512
 513 static struct bch_sb_field_quota *bch2_sb_get_or_create_quota(struct bch_sb_handle *sb)
 514 {
 515         struct bch_sb_field_quota *sb_quota = bch2_sb_get_quota(sb->sb);
 516
 517         if (sb_quota)
 518                 return sb_quota;
 519
 520         sb_quota = bch2_sb_resize_quota(sb, sizeof(*sb_quota) / sizeof(u64));
 521         if (sb_quota) {
 522                 unsigned qtype, qc;
 523
 524                 for (qtype = 0; qtype < QTYP_NR; qtype++)
 525                         for (qc = 0; qc < Q_COUNTERS; qc++)
 526                                 sb_quota->q[qtype].c[qc].timelimit =
 527                                         cpu_to_le32(7 * 24 * 60 * 60);
 528         }
 529
 530         return sb_quota;
 531 }
 532
 533 static void bch2_sb_quota_read(struct bch_fs *c)
 534 {
 535         struct bch_sb_field_quota *sb_quota;
 536         unsigned i, j;
 537
 538         sb_quota = bch2_sb_get_quota(c->disk_sb.sb);
 539         if (!sb_quota)
 540                 return;
 541
 542         for (i = 0; i < QTYP_NR; i++) {
 543                 struct bch_memquota_type *q = &c->quotas[i];
 544
 545                 for (j = 0; j < Q_COUNTERS; j++) {
 546                         q->limits[j].timelimit =
 547                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 548                         q->limits[j].warnlimit =
 549                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 550                 }
 551         }
 552 }
 553
 554 static int bch2_fs_quota_read_inode(struct btree_trans *trans,
 555                                     struct btree_iter *iter,
 556                                     struct bkey_s_c k)
 557 {
 558         struct bch_fs *c = trans->c;
 559         struct bch_inode_unpacked u;
 560         struct bch_snapshot_tree s_t;
 561         int ret;
 562
 563         ret = bch2_snapshot_tree_lookup(trans,
 564                         snapshot_t(c, k.k->p.snapshot)->tree, &s_t);
 565         bch2_fs_inconsistent_on(bch2_err_matches(ret, ENOENT), c,
 566                         "%s: snapshot tree %u not found", __func__,
 567                         snapshot_t(c, k.k->p.snapshot)->tree);
 568         if (ret)
 569                 return ret;
 570
 571         if (!s_t.master_subvol)
 572                 goto advance;
 573
 574         ret = bch2_inode_find_by_inum_trans(trans,
 575                                 (subvol_inum) {
 576                                         le32_to_cpu(s_t.master_subvol),
 577                                         k.k->p.offset,
 578                                 }, &u);
 579         if (ret)
 580                 return ret;
 581
 582         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 583                         KEY_TYPE_QUOTA_NOCHECK);
 584         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 585                         KEY_TYPE_QUOTA_NOCHECK);
 586 advance:
 587         bch2_btree_iter_set_pos(iter, bpos_nosnap_successor(iter->pos));
 588         return 0;
 589 }
 590
 591 int bch2_fs_quota_read(struct bch_fs *c)
 592 {
 593         struct bch_sb_field_quota *sb_quota;
 594         struct btree_trans trans;
 595         struct btree_iter iter;
 596         struct bkey_s_c k;
 597         int ret;
 598
 599         mutex_lock(&c->sb_lock);
 600         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 601         if (!sb_quota) {
 602                 mutex_unlock(&c->sb_lock);
 603                 return -BCH_ERR_ENOSPC_sb_quota;
 604         }
 605
 606         bch2_sb_quota_read(c);
 607         mutex_unlock(&c->sb_lock);
 608
 609         bch2_trans_init(&trans, c, 0, 0);
 610
 611         ret = for_each_btree_key2(&trans, iter, BTREE_ID_quotas,
 612                         POS_MIN, BTREE_ITER_PREFETCH, k,
 613                 __bch2_quota_set(c, k, NULL)) ?:
 614               for_each_btree_key2(&trans, iter, BTREE_ID_inodes,
 615                         POS_MIN, BTREE_ITER_PREFETCH|BTREE_ITER_ALL_SNAPSHOTS, k,
 616                 bch2_fs_quota_read_inode(&trans, &iter, k));
 617         if (ret)
 618                 bch_err(c, "err in quota_read: %s", bch2_err_str(ret));
 619
 620         bch2_trans_exit(&trans);
 621         return ret;
 622 }
 623
 624 /* Enable/disable/delete quotas for an entire filesystem: */
 625
 626 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 627 {
 628         struct bch_fs *c = sb->s_fs_info;
 629         struct bch_sb_field_quota *sb_quota;
 630         int ret = 0;
 631
 632         if (sb->s_flags & SB_RDONLY)
 633                 return -EROFS;
 634
 635         /* Accounting must be enabled at mount time: */
 636         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 637                 return -EINVAL;
 638
 639         /* Can't enable enforcement without accounting: */
 640         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 641                 return -EINVAL;
 642
 643         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 644                 return -EINVAL;
 645
 646         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 647                 return -EINVAL;
 648
 649         mutex_lock(&c->sb_lock);
 650         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 651         if (!sb_quota) {
 652                 ret = -BCH_ERR_ENOSPC_sb_quota;
 653                 goto unlock;
 654         }
 655
 656         if (uflags & FS_QUOTA_UDQ_ENFD)
 657                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, true);
 658
 659         if (uflags & FS_QUOTA_GDQ_ENFD)
 660                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, true);
 661
 662         if (uflags & FS_QUOTA_PDQ_ENFD)
 663                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, true);
 664
 665         bch2_write_super(c);
 666 unlock:
 667         mutex_unlock(&c->sb_lock);
 668
 669         return bch2_err_class(ret);
 670 }
 671
 672 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 673 {
 674         struct bch_fs *c = sb->s_fs_info;
 675
 676         if (sb->s_flags & SB_RDONLY)
 677                 return -EROFS;
 678
 679         mutex_lock(&c->sb_lock);
 680         if (uflags & FS_QUOTA_UDQ_ENFD)
 681                 SET_BCH_SB_USRQUOTA(c->disk_sb.sb, false);
 682
 683         if (uflags & FS_QUOTA_GDQ_ENFD)
 684                 SET_BCH_SB_GRPQUOTA(c->disk_sb.sb, false);
 685
 686         if (uflags & FS_QUOTA_PDQ_ENFD)
 687                 SET_BCH_SB_PRJQUOTA(c->disk_sb.sb, false);
 688
 689         bch2_write_super(c);
 690         mutex_unlock(&c->sb_lock);
 691
 692         return 0;
 693 }
 694
 695 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 696 {
 697         struct bch_fs *c = sb->s_fs_info;
 698         int ret;
 699
 700         if (sb->s_flags & SB_RDONLY)
 701                 return -EROFS;
 702
 703         if (uflags & FS_USER_QUOTA) {
 704                 if (c->opts.usrquota)
 705                         return -EINVAL;
 706
 707                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 708                                               POS(QTYP_USR, 0),
 709                                               POS(QTYP_USR, U64_MAX),
 710                                               0, NULL);
 711                 if (ret)
 712                         return ret;
 713         }
 714
 715         if (uflags & FS_GROUP_QUOTA) {
 716                 if (c->opts.grpquota)
 717                         return -EINVAL;
 718
 719                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 720                                               POS(QTYP_GRP, 0),
 721                                               POS(QTYP_GRP, U64_MAX),
 722                                               0, NULL);
 723                 if (ret)
 724                         return ret;
 725         }
 726
 727         if (uflags & FS_PROJ_QUOTA) {
 728                 if (c->opts.prjquota)
 729                         return -EINVAL;
 730
 731                 ret = bch2_btree_delete_range(c, BTREE_ID_quotas,
 732                                               POS(QTYP_PRJ, 0),
 733                                               POS(QTYP_PRJ, U64_MAX),
 734                                               0, NULL);
 735                 if (ret)
 736                         return ret;
 737         }
 738
 739         return 0;
 740 }
 741
 742 /*
 743  * Return quota status information, such as enforcements, quota file inode
 744  * numbers etc.
 745  */
 746 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 747 {
 748         struct bch_fs *c = sb->s_fs_info;
 749         unsigned qtypes = enabled_qtypes(c);
 750         unsigned i;
 751
 752         memset(state, 0, sizeof(*state));
 753
 754         for (i = 0; i < QTYP_NR; i++) {
 755                 state->s_state[i].flags |= QCI_SYSFILE;
 756
 757                 if (!(qtypes & (1 << i)))
 758                         continue;
 759
 760                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 761
 762                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 763                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 764
 765                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 766                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 767         }
 768
 769         return 0;
 770 }
 771
 772 /*
 773  * Adjust quota timers & warnings
 774  */
 775 static int bch2_quota_set_info(struct super_block *sb, int type,
 776                                struct qc_info *info)
 777 {
 778         struct bch_fs *c = sb->s_fs_info;
 779         struct bch_sb_field_quota *sb_quota;
 780         struct bch_memquota_type *q;
 781         int ret = 0;
 782
 783         if (0) {
 784                 struct printbuf buf = PRINTBUF;
 785
 786                 qc_info_to_text(&buf, info);
 787                 pr_info("setting:\n%s", buf.buf);
 788                 printbuf_exit(&buf);
 789         }
 790
 791         if (sb->s_flags & SB_RDONLY)
 792                 return -EROFS;
 793
 794         if (type >= QTYP_NR)
 795                 return -EINVAL;
 796
 797         if (!((1 << type) & enabled_qtypes(c)))
 798                 return -ESRCH;
 799
 800         if (info->i_fieldmask &
 801             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 802                 return -EINVAL;
 803
 804         q = &c->quotas[type];
 805
 806         mutex_lock(&c->sb_lock);
 807         sb_quota = bch2_sb_get_or_create_quota(&c->disk_sb);
 808         if (!sb_quota) {
 809                 ret = -BCH_ERR_ENOSPC_sb_quota;
 810                 goto unlock;
 811         }
 812
 813         if (info->i_fieldmask & QC_SPC_TIMER)
 814                 sb_quota->q[type].c[Q_SPC].timelimit =
 815                         cpu_to_le32(info->i_spc_timelimit);
 816
 817         if (info->i_fieldmask & QC_SPC_WARNS)
 818                 sb_quota->q[type].c[Q_SPC].warnlimit =
 819                         cpu_to_le32(info->i_spc_warnlimit);
 820
 821         if (info->i_fieldmask & QC_INO_TIMER)
 822                 sb_quota->q[type].c[Q_INO].timelimit =
 823                         cpu_to_le32(info->i_ino_timelimit);
 824
 825         if (info->i_fieldmask & QC_INO_WARNS)
 826                 sb_quota->q[type].c[Q_INO].warnlimit =
 827                         cpu_to_le32(info->i_ino_warnlimit);
 828
 829         bch2_sb_quota_read(c);
 830
 831         bch2_write_super(c);
 832 unlock:
 833         mutex_unlock(&c->sb_lock);
 834
 835         return bch2_err_class(ret);
 836 }
 837
 838 /* Get/set individual quotas: */
 839
 840 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 841 {
 842         dst->d_space            = src->c[Q_SPC].v << 9;
 843         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 844         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 845         dst->d_spc_timer        = src->c[Q_SPC].timer;
 846         dst->d_spc_warns        = src->c[Q_SPC].warns;
 847
 848         dst->d_ino_count        = src->c[Q_INO].v;
 849         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 850         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 851         dst->d_ino_timer        = src->c[Q_INO].timer;
 852         dst->d_ino_warns        = src->c[Q_INO].warns;
 853 }
 854
 855 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 856                           struct qc_dqblk *qdq)
 857 {
 858         struct bch_fs *c                = sb->s_fs_info;
 859         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 860         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 861         struct bch_memquota *mq;
 862
 863         memset(qdq, 0, sizeof(*qdq));
 864
 865         mutex_lock(&q->lock);
 866         mq = genradix_ptr(&q->table, qid);
 867         if (mq)
 868                 __bch2_quota_get(qdq, mq);
 869         mutex_unlock(&q->lock);
 870
 871         return 0;
 872 }
 873
 874 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 875                                struct qc_dqblk *qdq)
 876 {
 877         struct bch_fs *c                = sb->s_fs_info;
 878         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 879         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 880         struct genradix_iter iter;
 881         struct bch_memquota *mq;
 882         int ret = 0;
 883
 884         mutex_lock(&q->lock);
 885
 886         genradix_for_each_from(&q->table, iter, mq, qid)
 887                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 888                         __bch2_quota_get(qdq, mq);
 889                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 890                         goto found;
 891                 }
 892
 893         ret = -ENOENT;
 894 found:
 895         mutex_unlock(&q->lock);
 896         return ret;
 897 }
 898
 899 static int bch2_set_quota_trans(struct btree_trans *trans,
 900                                 struct bkey_i_quota *new_quota,
 901                                 struct qc_dqblk *qdq)
 902 {
 903         struct btree_iter iter;
 904         struct bkey_s_c k;
 905         int ret;
 906
 907         k = bch2_bkey_get_iter(trans, &iter, BTREE_ID_quotas, new_quota->k.p,
 908                                BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 909         ret = bkey_err(k);
 910         if (unlikely(ret))
 911                 return ret;
 912
 913         if (k.k->type == KEY_TYPE_quota)
 914                 new_quota->v = *bkey_s_c_to_quota(k).v;
 915
 916         if (qdq->d_fieldmask & QC_SPC_SOFT)
 917                 new_quota->v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 918         if (qdq->d_fieldmask & QC_SPC_HARD)
 919                 new_quota->v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 920
 921         if (qdq->d_fieldmask & QC_INO_SOFT)
 922                 new_quota->v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 923         if (qdq->d_fieldmask & QC_INO_HARD)
 924                 new_quota->v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 925
 926         ret = bch2_trans_update(trans, &iter, &new_quota->k_i, 0);
 927         bch2_trans_iter_exit(trans, &iter);
 928         return ret;
 929 }
 930
 931 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 932                           struct qc_dqblk *qdq)
 933 {
 934         struct bch_fs *c = sb->s_fs_info;
 935         struct bkey_i_quota new_quota;
 936         int ret;
 937
 938         if (0) {
 939                 struct printbuf buf = PRINTBUF;
 940
 941                 qc_dqblk_to_text(&buf, qdq);
 942                 pr_info("setting:\n%s", buf.buf);
 943                 printbuf_exit(&buf);
 944         }
 945
 946         if (sb->s_flags & SB_RDONLY)
 947                 return -EROFS;
 948
 949         bkey_quota_init(&new_quota.k_i);
 950         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 951
 952         ret = bch2_trans_do(c, NULL, NULL, 0,
 953                             bch2_set_quota_trans(&trans, &new_quota, qdq)) ?:
 954                 __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i), qdq);
 955
 956         return ret;
 957 }
 958
 959 const struct quotactl_ops bch2_quotactl_operations = {
 960         .quota_enable           = bch2_quota_enable,
 961         .quota_disable          = bch2_quota_disable,
 962         .rm_xquota              = bch2_quota_remove,
 963
 964         .get_state              = bch2_quota_get_state,
 965         .set_info               = bch2_quota_set_info,
 966
 967         .get_dqblk              = bch2_get_quota,
 968         .get_nextdqblk          = bch2_get_next_quota,
 969         .set_dqblk              = bch2_set_quota,
 970 };
 971
 972 #endif /* CONFIG_BCACHEFS_QUOTA */