git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/quota.c

   1 #include "bcachefs.h"
   2 #include "btree_update.h"
   3 #include "inode.h"
   4 #include "quota.h"
   5 #include "super-io.h"
   6
   7 static const char *bch2_quota_invalid(const struct bch_fs *c, struct bkey_s_c k)
   8 {
   9         struct bkey_s_c_quota dq;
  10
  11         if (k.k->p.inode >= QTYP_NR)
  12                 return "invalid quota type";
  13
  14         switch (k.k->type) {
  15         case BCH_QUOTA: {
  16                 dq = bkey_s_c_to_quota(k);
  17
  18                 if (bkey_val_bytes(k.k) != sizeof(struct bch_quota))
  19                         return "incorrect value size";
  20
  21                 return NULL;
  22         }
  23         default:
  24                 return "invalid type";
  25         }
  26 }
  27
  28 static const char * const bch2_quota_counters[] = {
  29         "space",
  30         "inodes",
  31 };
  32
  33 static void bch2_quota_to_text(struct bch_fs *c, char *buf,
  34                                size_t size, struct bkey_s_c k)
  35 {
  36         char *out = buf, *end= buf + size;
  37         struct bkey_s_c_quota dq;
  38         unsigned i;
  39
  40         switch (k.k->type) {
  41         case BCH_QUOTA:
  42                 dq = bkey_s_c_to_quota(k);
  43
  44                 for (i = 0; i < Q_COUNTERS; i++)
  45                         out += scnprintf(out, end - out, "%s hardlimit %llu softlimit %llu",
  46                                          bch2_quota_counters[i],
  47                                          le64_to_cpu(dq.v->c[i].hardlimit),
  48                                          le64_to_cpu(dq.v->c[i].softlimit));
  49                 break;
  50         }
  51 }
  52
  53 const struct bkey_ops bch2_bkey_quota_ops = {
  54         .key_invalid    = bch2_quota_invalid,
  55         .val_to_text    = bch2_quota_to_text,
  56 };
  57
  58 #ifdef CONFIG_BCACHEFS_QUOTA
  59
  60 #include <linux/cred.h>
  61 #include <linux/fs.h>
  62 #include <linux/quota.h>
  63
  64 static inline unsigned __next_qtype(unsigned i, unsigned qtypes)
  65 {
  66         qtypes >>= i;
  67         return qtypes ? i + __ffs(qtypes) : QTYP_NR;
  68 }
  69
  70 #define for_each_set_qtype(_c, _i, _q, _qtypes)                         \
  71         for (_i = 0;                                                    \
  72              (_i = __next_qtype(_i, _qtypes),                           \
  73               _q = &(_c)->quotas[_i],                                   \
  74               _i < QTYP_NR);                                            \
  75              _i++)
  76
  77 static bool ignore_hardlimit(struct bch_memquota_type *q)
  78 {
  79         if (capable(CAP_SYS_RESOURCE))
  80                 return true;
  81 #if 0
  82         struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
  83
  84         return capable(CAP_SYS_RESOURCE) &&
  85                (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
  86                 !(info->dqi_flags & DQF_ROOT_SQUASH));
  87 #endif
  88         return false;
  89 }
  90
  91 enum quota_msg {
  92         SOFTWARN,       /* Softlimit reached */
  93         SOFTLONGWARN,   /* Grace time expired */
  94         HARDWARN,       /* Hardlimit reached */
  95
  96         HARDBELOW,      /* Usage got below inode hardlimit */
  97         SOFTBELOW,      /* Usage got below inode softlimit */
  98 };
  99
 100 static int quota_nl[][Q_COUNTERS] = {
 101         [HARDWARN][Q_SPC]       = QUOTA_NL_BHARDWARN,
 102         [SOFTLONGWARN][Q_SPC]   = QUOTA_NL_BSOFTLONGWARN,
 103         [SOFTWARN][Q_SPC]       = QUOTA_NL_BSOFTWARN,
 104         [HARDBELOW][Q_SPC]      = QUOTA_NL_BHARDBELOW,
 105         [SOFTBELOW][Q_SPC]      = QUOTA_NL_BSOFTBELOW,
 106
 107         [HARDWARN][Q_INO]       = QUOTA_NL_IHARDWARN,
 108         [SOFTLONGWARN][Q_INO]   = QUOTA_NL_ISOFTLONGWARN,
 109         [SOFTWARN][Q_INO]       = QUOTA_NL_ISOFTWARN,
 110         [HARDBELOW][Q_INO]      = QUOTA_NL_IHARDBELOW,
 111         [SOFTBELOW][Q_INO]      = QUOTA_NL_ISOFTBELOW,
 112 };
 113
 114 struct quota_msgs {
 115         u8              nr;
 116         struct {
 117                 u8      qtype;
 118                 u8      msg;
 119         }               m[QTYP_NR * Q_COUNTERS];
 120 };
 121
 122 static void prepare_msg(unsigned qtype,
 123                         enum quota_counters counter,
 124                         struct quota_msgs *msgs,
 125                         enum quota_msg msg_type)
 126 {
 127         BUG_ON(msgs->nr >= ARRAY_SIZE(msgs->m));
 128
 129         msgs->m[msgs->nr].qtype = qtype;
 130         msgs->m[msgs->nr].msg   = quota_nl[msg_type][counter];
 131         msgs->nr++;
 132 }
 133
 134 static void prepare_warning(struct memquota_counter *qc,
 135                             unsigned qtype,
 136                             enum quota_counters counter,
 137                             struct quota_msgs *msgs,
 138                             enum quota_msg msg_type)
 139 {
 140         if (qc->warning_issued & (1 << msg_type))
 141                 return;
 142
 143         prepare_msg(qtype, counter, msgs, msg_type);
 144 }
 145
 146 static void flush_warnings(struct bch_qid qid,
 147                            struct super_block *sb,
 148                            struct quota_msgs *msgs)
 149 {
 150         unsigned i;
 151
 152         for (i = 0; i < msgs->nr; i++)
 153                 quota_send_warning(make_kqid(&init_user_ns, msgs->m[i].qtype, qid.q[i]),
 154                                    sb->s_dev, msgs->m[i].msg);
 155 }
 156
 157 static int bch2_quota_check_limit(struct bch_fs *c,
 158                                   unsigned qtype,
 159                                   struct bch_memquota *mq,
 160                                   struct quota_msgs *msgs,
 161                                   enum quota_counters counter,
 162                                   s64 v,
 163                                   enum quota_acct_mode mode)
 164 {
 165         struct bch_memquota_type *q = &c->quotas[qtype];
 166         struct memquota_counter *qc = &mq->c[counter];
 167         u64 n = qc->v + v;
 168
 169         BUG_ON((s64) n < 0);
 170
 171         if (mode == BCH_QUOTA_NOCHECK)
 172                 return 0;
 173
 174         if (v <= 0) {
 175                 if (n < qc->hardlimit &&
 176                     (qc->warning_issued & (1 << HARDWARN))) {
 177                         qc->warning_issued &= ~(1 << HARDWARN);
 178                         prepare_msg(qtype, counter, msgs, HARDBELOW);
 179                 }
 180
 181                 if (n < qc->softlimit &&
 182                     (qc->warning_issued & (1 << SOFTWARN))) {
 183                         qc->warning_issued &= ~(1 << SOFTWARN);
 184                         prepare_msg(qtype, counter, msgs, SOFTBELOW);
 185                 }
 186
 187                 qc->warning_issued = 0;
 188                 return 0;
 189         }
 190
 191         if (qc->hardlimit &&
 192             qc->hardlimit < n &&
 193             !ignore_hardlimit(q)) {
 194                 if (mode == BCH_QUOTA_PREALLOC)
 195                         return -EDQUOT;
 196
 197                 prepare_warning(qc, qtype, counter, msgs, HARDWARN);
 198         }
 199
 200         if (qc->softlimit &&
 201             qc->softlimit < n &&
 202             qc->timer &&
 203             ktime_get_real_seconds() >= qc->timer &&
 204             !ignore_hardlimit(q)) {
 205                 if (mode == BCH_QUOTA_PREALLOC)
 206                         return -EDQUOT;
 207
 208                 prepare_warning(qc, qtype, counter, msgs, SOFTLONGWARN);
 209         }
 210
 211         if (qc->softlimit &&
 212             qc->softlimit < n &&
 213             qc->timer == 0) {
 214                 if (mode == BCH_QUOTA_PREALLOC)
 215                         return -EDQUOT;
 216
 217                 prepare_warning(qc, qtype, counter, msgs, SOFTWARN);
 218
 219                 /* XXX is this the right one? */
 220                 qc->timer = ktime_get_real_seconds() +
 221                         q->limits[counter].warnlimit;
 222         }
 223
 224         return 0;
 225 }
 226
 227 int bch2_quota_acct(struct bch_fs *c, struct bch_qid qid,
 228                     enum quota_counters counter, s64 v,
 229                     enum quota_acct_mode mode)
 230 {
 231         unsigned qtypes = enabled_qtypes(c);
 232         struct bch_memquota_type *q;
 233         struct bch_memquota *mq[QTYP_NR];
 234         struct quota_msgs msgs;
 235         unsigned i;
 236         int ret = 0;
 237
 238         memset(&msgs, 0, sizeof(msgs));
 239
 240         for_each_set_qtype(c, i, q, qtypes)
 241                 mutex_lock_nested(&q->lock, i);
 242
 243         for_each_set_qtype(c, i, q, qtypes) {
 244                 mq[i] = genradix_ptr_alloc(&q->table, qid.q[i], GFP_NOFS);
 245                 if (!mq[i]) {
 246                         ret = -ENOMEM;
 247                         goto err;
 248                 }
 249
 250                 ret = bch2_quota_check_limit(c, i, mq[i], &msgs, counter, v, mode);
 251                 if (ret)
 252                         goto err;
 253         }
 254
 255         for_each_set_qtype(c, i, q, qtypes)
 256                 mq[i]->c[counter].v += v;
 257 err:
 258         for_each_set_qtype(c, i, q, qtypes)
 259                 mutex_unlock(&q->lock);
 260
 261         flush_warnings(qid, c->vfs_sb, &msgs);
 262
 263         return ret;
 264 }
 265
 266 static void __bch2_quota_transfer(struct bch_memquota *src_q,
 267                                   struct bch_memquota *dst_q,
 268                                   enum quota_counters counter, s64 v)
 269 {
 270         BUG_ON(v > src_q->c[counter].v);
 271         BUG_ON(v + dst_q->c[counter].v < v);
 272
 273         src_q->c[counter].v -= v;
 274         dst_q->c[counter].v += v;
 275 }
 276
 277 int bch2_quota_transfer(struct bch_fs *c, unsigned qtypes,
 278                         struct bch_qid dst,
 279                         struct bch_qid src, u64 space)
 280 {
 281         struct bch_memquota_type *q;
 282         struct bch_memquota *src_q[3], *dst_q[3];
 283         struct quota_msgs msgs;
 284         unsigned i;
 285         int ret = 0;
 286
 287         qtypes &= enabled_qtypes(c);
 288
 289         memset(&msgs, 0, sizeof(msgs));
 290
 291         for_each_set_qtype(c, i, q, qtypes)
 292                 mutex_lock_nested(&q->lock, i);
 293
 294         for_each_set_qtype(c, i, q, qtypes) {
 295                 src_q[i] = genradix_ptr_alloc(&q->table, src.q[i], GFP_NOFS);
 296                 dst_q[i] = genradix_ptr_alloc(&q->table, dst.q[i], GFP_NOFS);
 297
 298                 if (!src_q[i] || !dst_q[i]) {
 299                         ret = -ENOMEM;
 300                         goto err;
 301                 }
 302
 303                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_SPC,
 304                                              dst_q[i]->c[Q_SPC].v + space,
 305                                              BCH_QUOTA_PREALLOC);
 306                 if (ret)
 307                         goto err;
 308
 309                 ret = bch2_quota_check_limit(c, i, dst_q[i], &msgs, Q_INO,
 310                                              dst_q[i]->c[Q_INO].v + 1,
 311                                              BCH_QUOTA_PREALLOC);
 312                 if (ret)
 313                         goto err;
 314         }
 315
 316         for_each_set_qtype(c, i, q, qtypes) {
 317                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_SPC, space);
 318                 __bch2_quota_transfer(src_q[i], dst_q[i], Q_INO, 1);
 319         }
 320
 321 err:
 322         for_each_set_qtype(c, i, q, qtypes)
 323                 mutex_unlock(&q->lock);
 324
 325         flush_warnings(dst, c->vfs_sb, &msgs);
 326
 327         return ret;
 328 }
 329
 330 static int __bch2_quota_set(struct bch_fs *c, struct bkey_s_c k)
 331 {
 332         struct bkey_s_c_quota dq;
 333         struct bch_memquota_type *q;
 334         struct bch_memquota *mq;
 335         unsigned i;
 336
 337         BUG_ON(k.k->p.inode >= QTYP_NR);
 338
 339         switch (k.k->type) {
 340         case BCH_QUOTA:
 341                 dq = bkey_s_c_to_quota(k);
 342                 q = &c->quotas[k.k->p.inode];
 343
 344                 mutex_lock(&q->lock);
 345                 mq = genradix_ptr_alloc(&q->table, k.k->p.offset, GFP_KERNEL);
 346                 if (!mq) {
 347                         mutex_unlock(&q->lock);
 348                         return -ENOMEM;
 349                 }
 350
 351                 for (i = 0; i < Q_COUNTERS; i++) {
 352                         mq->c[i].hardlimit = le64_to_cpu(dq.v->c[i].hardlimit);
 353                         mq->c[i].softlimit = le64_to_cpu(dq.v->c[i].softlimit);
 354                 }
 355
 356                 mutex_unlock(&q->lock);
 357         }
 358
 359         return 0;
 360 }
 361
 362 static int bch2_quota_init_type(struct bch_fs *c, enum quota_types type)
 363 {
 364         struct btree_iter iter;
 365         struct bkey_s_c k;
 366         int ret = 0;
 367
 368         for_each_btree_key(&iter, c, BTREE_ID_QUOTAS, POS(type, 0),
 369                            BTREE_ITER_PREFETCH, k) {
 370                 if (k.k->p.inode != type)
 371                         break;
 372
 373                 ret = __bch2_quota_set(c, k);
 374                 if (ret)
 375                         break;
 376         }
 377
 378         return bch2_btree_iter_unlock(&iter) ?: ret;
 379 }
 380
 381 void bch2_fs_quota_exit(struct bch_fs *c)
 382 {
 383         unsigned i;
 384
 385         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 386                 genradix_free(&c->quotas[i].table);
 387 }
 388
 389 void bch2_fs_quota_init(struct bch_fs *c)
 390 {
 391         unsigned i;
 392
 393         for (i = 0; i < ARRAY_SIZE(c->quotas); i++)
 394                 mutex_init(&c->quotas[i].lock);
 395 }
 396
 397 static void bch2_sb_quota_read(struct bch_fs *c)
 398 {
 399         struct bch_sb_field_quota *sb_quota;
 400         unsigned i, j;
 401
 402         sb_quota = bch2_sb_get_quota(c->disk_sb);
 403         if (!sb_quota)
 404                 return;
 405
 406         for (i = 0; i < QTYP_NR; i++) {
 407                 struct bch_memquota_type *q = &c->quotas[i];
 408
 409                 for (j = 0; j < Q_COUNTERS; j++) {
 410                         q->limits[j].timelimit =
 411                                 le32_to_cpu(sb_quota->q[i].c[j].timelimit);
 412                         q->limits[j].warnlimit =
 413                                 le32_to_cpu(sb_quota->q[i].c[j].warnlimit);
 414                 }
 415         }
 416 }
 417
 418 int bch2_fs_quota_read(struct bch_fs *c)
 419 {
 420         unsigned i, qtypes = enabled_qtypes(c);
 421         struct bch_memquota_type *q;
 422         struct btree_iter iter;
 423         struct bch_inode_unpacked u;
 424         struct bkey_s_c k;
 425         int ret;
 426
 427         mutex_lock(&c->sb_lock);
 428         bch2_sb_quota_read(c);
 429         mutex_unlock(&c->sb_lock);
 430
 431         for_each_set_qtype(c, i, q, qtypes) {
 432                 ret = bch2_quota_init_type(c, i);
 433                 if (ret)
 434                         return ret;
 435         }
 436
 437         for_each_btree_key(&iter, c, BTREE_ID_INODES, POS_MIN,
 438                            BTREE_ITER_PREFETCH, k) {
 439                 switch (k.k->type) {
 440                 case BCH_INODE_FS:
 441                         ret = bch2_inode_unpack(bkey_s_c_to_inode(k), &u);
 442                         if (ret)
 443                                 return ret;
 444
 445                         bch2_quota_acct(c, bch_qid(&u), Q_SPC, u.bi_sectors,
 446                                         BCH_QUOTA_NOCHECK);
 447                         bch2_quota_acct(c, bch_qid(&u), Q_INO, 1,
 448                                         BCH_QUOTA_NOCHECK);
 449                 }
 450         }
 451         return bch2_btree_iter_unlock(&iter) ?: ret;
 452 }
 453
 454 /* Enable/disable/delete quotas for an entire filesystem: */
 455
 456 static int bch2_quota_enable(struct super_block *sb, unsigned uflags)
 457 {
 458         struct bch_fs *c = sb->s_fs_info;
 459
 460         if (sb->s_flags & MS_RDONLY)
 461                 return -EROFS;
 462
 463         /* Accounting must be enabled at mount time: */
 464         if (uflags & (FS_QUOTA_UDQ_ACCT|FS_QUOTA_GDQ_ACCT|FS_QUOTA_PDQ_ACCT))
 465                 return -EINVAL;
 466
 467         /* Can't enable enforcement without accounting: */
 468         if ((uflags & FS_QUOTA_UDQ_ENFD) && !c->opts.usrquota)
 469                 return -EINVAL;
 470
 471         if ((uflags & FS_QUOTA_GDQ_ENFD) && !c->opts.grpquota)
 472                 return -EINVAL;
 473
 474         if (uflags & FS_QUOTA_PDQ_ENFD && !c->opts.prjquota)
 475                 return -EINVAL;
 476
 477         mutex_lock(&c->sb_lock);
 478         if (uflags & FS_QUOTA_UDQ_ENFD)
 479                 SET_BCH_SB_USRQUOTA(c->disk_sb, true);
 480
 481         if (uflags & FS_QUOTA_GDQ_ENFD)
 482                 SET_BCH_SB_GRPQUOTA(c->disk_sb, true);
 483
 484         if (uflags & FS_QUOTA_PDQ_ENFD)
 485                 SET_BCH_SB_PRJQUOTA(c->disk_sb, true);
 486
 487         bch2_write_super(c);
 488         mutex_unlock(&c->sb_lock);
 489
 490         return 0;
 491 }
 492
 493 static int bch2_quota_disable(struct super_block *sb, unsigned uflags)
 494 {
 495         struct bch_fs *c = sb->s_fs_info;
 496
 497         if (sb->s_flags & MS_RDONLY)
 498                 return -EROFS;
 499
 500         mutex_lock(&c->sb_lock);
 501         if (uflags & FS_QUOTA_UDQ_ENFD)
 502                 SET_BCH_SB_USRQUOTA(c->disk_sb, false);
 503
 504         if (uflags & FS_QUOTA_GDQ_ENFD)
 505                 SET_BCH_SB_GRPQUOTA(c->disk_sb, false);
 506
 507         if (uflags & FS_QUOTA_PDQ_ENFD)
 508                 SET_BCH_SB_PRJQUOTA(c->disk_sb, false);
 509
 510         bch2_write_super(c);
 511         mutex_unlock(&c->sb_lock);
 512
 513         return 0;
 514 }
 515
 516 static int bch2_quota_remove(struct super_block *sb, unsigned uflags)
 517 {
 518         struct bch_fs *c = sb->s_fs_info;
 519         int ret;
 520
 521         if (sb->s_flags & MS_RDONLY)
 522                 return -EROFS;
 523
 524         if (uflags & FS_USER_QUOTA) {
 525                 if (c->opts.usrquota)
 526                         return -EINVAL;
 527
 528                 ret = bch2_btree_delete_range(c, BTREE_ID_QUOTAS,
 529                                               POS(QTYP_USR, 0),
 530                                               POS(QTYP_USR + 1, 0),
 531                                               ZERO_VERSION, NULL, NULL, NULL);
 532                 if (ret)
 533                         return ret;
 534         }
 535
 536         if (uflags & FS_GROUP_QUOTA) {
 537                 if (c->opts.grpquota)
 538                         return -EINVAL;
 539
 540                 ret = bch2_btree_delete_range(c, BTREE_ID_QUOTAS,
 541                                               POS(QTYP_GRP, 0),
 542                                               POS(QTYP_GRP + 1, 0),
 543                                               ZERO_VERSION, NULL, NULL, NULL);
 544                 if (ret)
 545                         return ret;
 546         }
 547
 548         if (uflags & FS_PROJ_QUOTA) {
 549                 if (c->opts.prjquota)
 550                         return -EINVAL;
 551
 552                 ret = bch2_btree_delete_range(c, BTREE_ID_QUOTAS,
 553                                               POS(QTYP_PRJ, 0),
 554                                               POS(QTYP_PRJ + 1, 0),
 555                                               ZERO_VERSION, NULL, NULL, NULL);
 556                 if (ret)
 557                         return ret;
 558         }
 559
 560         return 0;
 561 }
 562
 563 /*
 564  * Return quota status information, such as enforcements, quota file inode
 565  * numbers etc.
 566  */
 567 static int bch2_quota_get_state(struct super_block *sb, struct qc_state *state)
 568 {
 569         struct bch_fs *c = sb->s_fs_info;
 570         unsigned qtypes = enabled_qtypes(c);
 571         unsigned i;
 572
 573         memset(state, 0, sizeof(*state));
 574
 575         for (i = 0; i < QTYP_NR; i++) {
 576                 state->s_state[i].flags |= QCI_SYSFILE;
 577
 578                 if (!(qtypes & (1 << i)))
 579                         continue;
 580
 581                 state->s_state[i].flags |= QCI_ACCT_ENABLED;
 582
 583                 state->s_state[i].spc_timelimit = c->quotas[i].limits[Q_SPC].timelimit;
 584                 state->s_state[i].spc_warnlimit = c->quotas[i].limits[Q_SPC].warnlimit;
 585
 586                 state->s_state[i].ino_timelimit = c->quotas[i].limits[Q_INO].timelimit;
 587                 state->s_state[i].ino_warnlimit = c->quotas[i].limits[Q_INO].warnlimit;
 588         }
 589
 590         return 0;
 591 }
 592
 593 /*
 594  * Adjust quota timers & warnings
 595  */
 596 static int bch2_quota_set_info(struct super_block *sb, int type,
 597                                struct qc_info *info)
 598 {
 599         struct bch_fs *c = sb->s_fs_info;
 600         struct bch_sb_field_quota *sb_quota;
 601         struct bch_memquota_type *q;
 602
 603         if (sb->s_flags & MS_RDONLY)
 604                 return -EROFS;
 605
 606         if (type >= QTYP_NR)
 607                 return -EINVAL;
 608
 609         if (!((1 << type) & enabled_qtypes(c)))
 610                 return -ESRCH;
 611
 612         if (info->i_fieldmask &
 613             ~(QC_SPC_TIMER|QC_INO_TIMER|QC_SPC_WARNS|QC_INO_WARNS))
 614                 return -EINVAL;
 615
 616         q = &c->quotas[type];
 617
 618         mutex_lock(&c->sb_lock);
 619         sb_quota = bch2_sb_get_quota(c->disk_sb);
 620         if (!sb_quota) {
 621                 sb_quota = bch2_fs_sb_resize_quota(c, sizeof(*sb_quota) / sizeof(u64));
 622                 if (!sb_quota)
 623                         return -ENOSPC;
 624         }
 625
 626         if (info->i_fieldmask & QC_SPC_TIMER)
 627                 sb_quota->q[type].c[Q_SPC].timelimit =
 628                         cpu_to_le32(info->i_spc_timelimit);
 629
 630         if (info->i_fieldmask & QC_SPC_WARNS)
 631                 sb_quota->q[type].c[Q_SPC].warnlimit =
 632                         cpu_to_le32(info->i_spc_warnlimit);
 633
 634         if (info->i_fieldmask & QC_INO_TIMER)
 635                 sb_quota->q[type].c[Q_INO].timelimit =
 636                         cpu_to_le32(info->i_ino_timelimit);
 637
 638         if (info->i_fieldmask & QC_INO_WARNS)
 639                 sb_quota->q[type].c[Q_INO].warnlimit =
 640                         cpu_to_le32(info->i_ino_warnlimit);
 641
 642         bch2_sb_quota_read(c);
 643
 644         bch2_write_super(c);
 645         mutex_unlock(&c->sb_lock);
 646
 647         return 0;
 648 }
 649
 650 /* Get/set individual quotas: */
 651
 652 static void __bch2_quota_get(struct qc_dqblk *dst, struct bch_memquota *src)
 653 {
 654         dst->d_space            = src->c[Q_SPC].v << 9;
 655         dst->d_spc_hardlimit    = src->c[Q_SPC].hardlimit << 9;
 656         dst->d_spc_softlimit    = src->c[Q_SPC].softlimit << 9;
 657         dst->d_spc_timer        = src->c[Q_SPC].timer;
 658         dst->d_spc_warns        = src->c[Q_SPC].warns;
 659
 660         dst->d_ino_count        = src->c[Q_INO].v;
 661         dst->d_ino_hardlimit    = src->c[Q_INO].hardlimit;
 662         dst->d_ino_softlimit    = src->c[Q_INO].softlimit;
 663         dst->d_ino_timer        = src->c[Q_INO].timer;
 664         dst->d_ino_warns        = src->c[Q_INO].warns;
 665 }
 666
 667 static int bch2_get_quota(struct super_block *sb, struct kqid kqid,
 668                           struct qc_dqblk *qdq)
 669 {
 670         struct bch_fs *c                = sb->s_fs_info;
 671         struct bch_memquota_type *q     = &c->quotas[kqid.type];
 672         qid_t qid                       = from_kqid(&init_user_ns, kqid);
 673         struct bch_memquota *mq;
 674
 675         memset(qdq, 0, sizeof(*qdq));
 676
 677         mutex_lock(&q->lock);
 678         mq = genradix_ptr(&q->table, qid);
 679         if (mq)
 680                 __bch2_quota_get(qdq, mq);
 681         mutex_unlock(&q->lock);
 682
 683         return 0;
 684 }
 685
 686 static int bch2_get_next_quota(struct super_block *sb, struct kqid *kqid,
 687                                struct qc_dqblk *qdq)
 688 {
 689         struct bch_fs *c                = sb->s_fs_info;
 690         struct bch_memquota_type *q     = &c->quotas[kqid->type];
 691         qid_t qid                       = from_kqid(&init_user_ns, *kqid);
 692         struct genradix_iter iter       = genradix_iter_init(&q->table, qid);
 693         struct bch_memquota *mq;
 694         int ret = 0;
 695
 696         mutex_lock(&q->lock);
 697
 698         while ((mq = genradix_iter_peek(&iter, &q->table))) {
 699                 if (memcmp(mq, page_address(ZERO_PAGE(0)), sizeof(*mq))) {
 700                         __bch2_quota_get(qdq, mq);
 701                         *kqid = make_kqid(current_user_ns(), kqid->type, iter.pos);
 702                         goto found;
 703                 }
 704
 705                 genradix_iter_advance(&iter, &q->table);
 706         }
 707
 708         ret = -ENOENT;
 709 found:
 710         mutex_unlock(&q->lock);
 711         return ret;
 712 }
 713
 714 static int bch2_set_quota(struct super_block *sb, struct kqid qid,
 715                           struct qc_dqblk *qdq)
 716 {
 717         struct bch_fs *c = sb->s_fs_info;
 718         struct btree_iter iter;
 719         struct bkey_s_c k;
 720         struct bkey_i_quota new_quota;
 721         int ret;
 722
 723         if (sb->s_flags & MS_RDONLY)
 724                 return -EROFS;
 725
 726         bkey_quota_init(&new_quota.k_i);
 727         new_quota.k.p = POS(qid.type, from_kqid(&init_user_ns, qid));
 728
 729         bch2_btree_iter_init(&iter, c, BTREE_ID_QUOTAS, new_quota.k.p,
 730                              BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
 731         k = bch2_btree_iter_peek_slot(&iter);
 732
 733         ret = btree_iter_err(k);
 734         if (unlikely(ret))
 735                 return ret;
 736
 737         switch (k.k->type) {
 738         case BCH_QUOTA:
 739                 new_quota.v = *bkey_s_c_to_quota(k).v;
 740                 break;
 741         }
 742
 743         if (qdq->d_fieldmask & QC_SPC_SOFT)
 744                 new_quota.v.c[Q_SPC].softlimit = cpu_to_le64(qdq->d_spc_softlimit >> 9);
 745         if (qdq->d_fieldmask & QC_SPC_HARD)
 746                 new_quota.v.c[Q_SPC].hardlimit = cpu_to_le64(qdq->d_spc_hardlimit >> 9);
 747
 748         if (qdq->d_fieldmask & QC_INO_SOFT)
 749                 new_quota.v.c[Q_INO].softlimit = cpu_to_le64(qdq->d_ino_softlimit);
 750         if (qdq->d_fieldmask & QC_INO_HARD)
 751                 new_quota.v.c[Q_INO].hardlimit = cpu_to_le64(qdq->d_ino_hardlimit);
 752
 753         ret = bch2_btree_insert_at(c, NULL, NULL, NULL, 0,
 754                                    BTREE_INSERT_ENTRY(&iter, &new_quota.k_i));
 755         bch2_btree_iter_unlock(&iter);
 756
 757         if (ret)
 758                 return ret;
 759
 760         ret = __bch2_quota_set(c, bkey_i_to_s_c(&new_quota.k_i));
 761
 762         return ret;
 763 }
 764
 765 const struct quotactl_ops bch2_quotactl_operations = {
 766         .quota_enable           = bch2_quota_enable,
 767         .quota_disable          = bch2_quota_disable,
 768         .rm_xquota              = bch2_quota_remove,
 769
 770         .get_state              = bch2_quota_get_state,
 771         .set_info               = bch2_quota_set_info,
 772
 773         .get_dqblk              = bch2_get_quota,
 774         .get_nextdqblk          = bch2_get_next_quota,
 775         .set_dqblk              = bch2_set_quota,
 776 };
 777
 778 #endif /* CONFIG_BCACHEFS_QUOTA */