fs/gfs2/quota.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 /*
   8  * Quota change tags are associated with each transaction that allocates or
   9  * deallocates space.  Those changes are accumulated locally to each node (in a
  10  * per-node file) and then are periodically synced to the quota file.  This
  11  * avoids the bottleneck of constantly touching the quota file, but introduces
  12  * fuzziness in the current usage value of IDs that are being used on different
  13  * nodes in the cluster simultaneously.  So, it is possible for a user on
  14  * multiple nodes to overrun their quota, but that overrun is controlable.
  15  * Since quota tags are part of transactions, there is no need for a quota check
  16  * program to be run on node crashes or anything like that.
  17  *
  18  * There are couple of knobs that let the administrator manage the quota
  19  * fuzziness.  "quota_quantum" sets the maximum time a quota change can be
  20  * sitting on one node before being synced to the quota file.  (The default is
  21  * 60 seconds.)  Another knob, "quota_scale" controls how quickly the frequency
  22  * of quota file syncs increases as the user moves closer to their limit.  The
  23  * more frequent the syncs, the more accurate the quota enforcement, but that
  24  * means that there is more contention between the nodes for the quota file.
  25  * The default value is one.  This sets the maximum theoretical quota overrun
  26  * (with infinite node with infinite bandwidth) to twice the user's limit.  (In
  27  * practice, the maximum overrun you see should be much less.)  A "quota_scale"
  28  * number greater than one makes quota syncs more frequent and reduces the
  29  * maximum overrun.  Numbers less than one (but greater than zero) make quota
  30  * syncs less frequent.
  31  *
  32  * GFS quotas also use per-ID Lock Value Blocks (LVBs) to cache the contents of
  33  * the quota file, so it is not being constantly read.
  34  */
  35
  36 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  37
  38 #include <linux/sched.h>
  39 #include <linux/slab.h>
  40 #include <linux/mm.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/completion.h>
  43 #include <linux/buffer_head.h>
  44 #include <linux/sort.h>
  45 #include <linux/fs.h>
  46 #include <linux/bio.h>
  47 #include <linux/gfs2_ondisk.h>
  48 #include <linux/kthread.h>
  49 #include <linux/freezer.h>
  50 #include <linux/quota.h>
  51 #include <linux/dqblk_xfs.h>
  52 #include <linux/lockref.h>
  53 #include <linux/list_lru.h>
  54 #include <linux/rcupdate.h>
  55 #include <linux/rculist_bl.h>
  56 #include <linux/bit_spinlock.h>
  57 #include <linux/jhash.h>
  58 #include <linux/vmalloc.h>
  59
  60 #include "gfs2.h"
  61 #include "incore.h"
  62 #include "bmap.h"
  63 #include "glock.h"
  64 #include "glops.h"
  65 #include "log.h"
  66 #include "meta_io.h"
  67 #include "quota.h"
  68 #include "rgrp.h"
  69 #include "super.h"
  70 #include "trans.h"
  71 #include "inode.h"
  72 #include "util.h"
  73
  74 #define GFS2_QD_HASH_SHIFT      12
  75 #define GFS2_QD_HASH_SIZE       BIT(GFS2_QD_HASH_SHIFT)
  76 #define GFS2_QD_HASH_MASK       (GFS2_QD_HASH_SIZE - 1)
  77
  78 /* Lock order: qd_lock -> bucket lock -> qd->lockref.lock -> lru lock */
  79 /*                     -> sd_bitmap_lock                              */
  80 static DEFINE_SPINLOCK(qd_lock);
  81 struct list_lru gfs2_qd_lru;
  82
  83 static struct hlist_bl_head qd_hash_table[GFS2_QD_HASH_SIZE];
  84
  85 static unsigned int gfs2_qd_hash(const struct gfs2_sbd *sdp,
  86                                  const struct kqid qid)
  87 {
  88         unsigned int h;
  89
  90         h = jhash(&sdp, sizeof(struct gfs2_sbd *), 0);
  91         h = jhash(&qid, sizeof(struct kqid), h);
  92
  93         return h & GFS2_QD_HASH_MASK;
  94 }
  95
  96 static inline void spin_lock_bucket(unsigned int hash)
  97 {
  98         hlist_bl_lock(&qd_hash_table[hash]);
  99 }
 100
 101 static inline void spin_unlock_bucket(unsigned int hash)
 102 {
 103         hlist_bl_unlock(&qd_hash_table[hash]);
 104 }
 105
 106 static void gfs2_qd_dealloc(struct rcu_head *rcu)
 107 {
 108         struct gfs2_quota_data *qd = container_of(rcu, struct gfs2_quota_data, qd_rcu);
 109         struct gfs2_sbd *sdp = qd->qd_sbd;
 110
 111         kmem_cache_free(gfs2_quotad_cachep, qd);
 112         if (atomic_dec_and_test(&sdp->sd_quota_count))
 113                 wake_up(&sdp->sd_kill_wait);
 114 }
 115
 116 static void gfs2_qd_dispose(struct gfs2_quota_data *qd)
 117 {
 118         struct gfs2_sbd *sdp = qd->qd_sbd;
 119
 120         spin_lock(&qd_lock);
 121         list_del(&qd->qd_list);
 122         spin_unlock(&qd_lock);
 123
 124         spin_lock_bucket(qd->qd_hash);
 125         hlist_bl_del_rcu(&qd->qd_hlist);
 126         spin_unlock_bucket(qd->qd_hash);
 127
 128         if (!gfs2_withdrawing_or_withdrawn(sdp)) {
 129                 gfs2_assert_warn(sdp, !qd->qd_change);
 130                 gfs2_assert_warn(sdp, !qd->qd_slot_ref);
 131                 gfs2_assert_warn(sdp, !qd->qd_bh_count);
 132         }
 133
 134         gfs2_glock_put(qd->qd_gl);
 135         call_rcu(&qd->qd_rcu, gfs2_qd_dealloc);
 136 }
 137
 138 static void gfs2_qd_list_dispose(struct list_head *list)
 139 {
 140         struct gfs2_quota_data *qd;
 141
 142         while (!list_empty(list)) {
 143                 qd = list_first_entry(list, struct gfs2_quota_data, qd_lru);
 144                 list_del(&qd->qd_lru);
 145
 146                 gfs2_qd_dispose(qd);
 147         }
 148 }
 149
 150
 151 static enum lru_status gfs2_qd_isolate(struct list_head *item,
 152                 struct list_lru_one *lru, spinlock_t *lru_lock, void *arg)
 153 {
 154         struct list_head *dispose = arg;
 155         struct gfs2_quota_data *qd =
 156                 list_entry(item, struct gfs2_quota_data, qd_lru);
 157         enum lru_status status;
 158
 159         if (!spin_trylock(&qd->qd_lockref.lock))
 160                 return LRU_SKIP;
 161
 162         status = LRU_SKIP;
 163         if (qd->qd_lockref.count == 0) {
 164                 lockref_mark_dead(&qd->qd_lockref);
 165                 list_lru_isolate_move(lru, &qd->qd_lru, dispose);
 166                 status = LRU_REMOVED;
 167         }
 168
 169         spin_unlock(&qd->qd_lockref.lock);
 170         return status;
 171 }
 172
 173 static unsigned long gfs2_qd_shrink_scan(struct shrinker *shrink,
 174                                          struct shrink_control *sc)
 175 {
 176         LIST_HEAD(dispose);
 177         unsigned long freed;
 178
 179         if (!(sc->gfp_mask & __GFP_FS))
 180                 return SHRINK_STOP;
 181
 182         freed = list_lru_shrink_walk(&gfs2_qd_lru, sc,
 183                                      gfs2_qd_isolate, &dispose);
 184
 185         gfs2_qd_list_dispose(&dispose);
 186
 187         return freed;
 188 }
 189
 190 static unsigned long gfs2_qd_shrink_count(struct shrinker *shrink,
 191                                           struct shrink_control *sc)
 192 {
 193         return vfs_pressure_ratio(list_lru_shrink_count(&gfs2_qd_lru, sc));
 194 }
 195
 196 static struct shrinker *gfs2_qd_shrinker;
 197
 198 int __init gfs2_qd_shrinker_init(void)
 199 {
 200         gfs2_qd_shrinker = shrinker_alloc(SHRINKER_NUMA_AWARE, "gfs2-qd");
 201         if (!gfs2_qd_shrinker)
 202                 return -ENOMEM;
 203
 204         gfs2_qd_shrinker->count_objects = gfs2_qd_shrink_count;
 205         gfs2_qd_shrinker->scan_objects = gfs2_qd_shrink_scan;
 206
 207         shrinker_register(gfs2_qd_shrinker);
 208
 209         return 0;
 210 }
 211
 212 void gfs2_qd_shrinker_exit(void)
 213 {
 214         shrinker_free(gfs2_qd_shrinker);
 215 }
 216
 217 static u64 qd2index(struct gfs2_quota_data *qd)
 218 {
 219         struct kqid qid = qd->qd_id;
 220         return (2 * (u64)from_kqid(&init_user_ns, qid)) +
 221                 ((qid.type == USRQUOTA) ? 0 : 1);
 222 }
 223
 224 static u64 qd2offset(struct gfs2_quota_data *qd)
 225 {
 226         return qd2index(qd) * sizeof(struct gfs2_quota);
 227 }
 228
 229 static struct gfs2_quota_data *qd_alloc(unsigned hash, struct gfs2_sbd *sdp, struct kqid qid)
 230 {
 231         struct gfs2_quota_data *qd;
 232         int error;
 233
 234         qd = kmem_cache_zalloc(gfs2_quotad_cachep, GFP_NOFS);
 235         if (!qd)
 236                 return NULL;
 237
 238         qd->qd_sbd = sdp;
 239         qd->qd_lockref.count = 0;
 240         spin_lock_init(&qd->qd_lockref.lock);
 241         qd->qd_id = qid;
 242         qd->qd_slot = -1;
 243         INIT_LIST_HEAD(&qd->qd_lru);
 244         qd->qd_hash = hash;
 245
 246         error = gfs2_glock_get(sdp, qd2index(qd),
 247                               &gfs2_quota_glops, CREATE, &qd->qd_gl);
 248         if (error)
 249                 goto fail;
 250
 251         return qd;
 252
 253 fail:
 254         kmem_cache_free(gfs2_quotad_cachep, qd);
 255         return NULL;
 256 }
 257
 258 static struct gfs2_quota_data *gfs2_qd_search_bucket(unsigned int hash,
 259                                                      const struct gfs2_sbd *sdp,
 260                                                      struct kqid qid)
 261 {
 262         struct gfs2_quota_data *qd;
 263         struct hlist_bl_node *h;
 264
 265         hlist_bl_for_each_entry_rcu(qd, h, &qd_hash_table[hash], qd_hlist) {
 266                 if (!qid_eq(qd->qd_id, qid))
 267                         continue;
 268                 if (qd->qd_sbd != sdp)
 269                         continue;
 270                 if (lockref_get_not_dead(&qd->qd_lockref)) {
 271                         list_lru_del_obj(&gfs2_qd_lru, &qd->qd_lru);
 272                         return qd;
 273                 }
 274         }
 275
 276         return NULL;
 277 }
 278
 279
 280 static int qd_get(struct gfs2_sbd *sdp, struct kqid qid,
 281                   struct gfs2_quota_data **qdp)
 282 {
 283         struct gfs2_quota_data *qd, *new_qd;
 284         unsigned int hash = gfs2_qd_hash(sdp, qid);
 285
 286         rcu_read_lock();
 287         *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
 288         rcu_read_unlock();
 289
 290         if (qd)
 291                 return 0;
 292
 293         new_qd = qd_alloc(hash, sdp, qid);
 294         if (!new_qd)
 295                 return -ENOMEM;
 296
 297         spin_lock(&qd_lock);
 298         spin_lock_bucket(hash);
 299         *qdp = qd = gfs2_qd_search_bucket(hash, sdp, qid);
 300         if (qd == NULL) {
 301                 new_qd->qd_lockref.count++;
 302                 *qdp = new_qd;
 303                 list_add(&new_qd->qd_list, &sdp->sd_quota_list);
 304                 hlist_bl_add_head_rcu(&new_qd->qd_hlist, &qd_hash_table[hash]);
 305                 atomic_inc(&sdp->sd_quota_count);
 306         }
 307         spin_unlock_bucket(hash);
 308         spin_unlock(&qd_lock);
 309
 310         if (qd) {
 311                 gfs2_glock_put(new_qd->qd_gl);
 312                 kmem_cache_free(gfs2_quotad_cachep, new_qd);
 313         }
 314
 315         return 0;
 316 }
 317
 318
 319 static void __qd_hold(struct gfs2_quota_data *qd)
 320 {
 321         struct gfs2_sbd *sdp = qd->qd_sbd;
 322         gfs2_assert(sdp, qd->qd_lockref.count > 0);
 323         qd->qd_lockref.count++;
 324 }
 325
 326 static void qd_put(struct gfs2_quota_data *qd)
 327 {
 328         struct gfs2_sbd *sdp;
 329
 330         if (lockref_put_or_lock(&qd->qd_lockref))
 331                 return;
 332
 333         BUG_ON(__lockref_is_dead(&qd->qd_lockref));
 334         sdp = qd->qd_sbd;
 335         if (unlikely(!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))) {
 336                 lockref_mark_dead(&qd->qd_lockref);
 337                 spin_unlock(&qd->qd_lockref.lock);
 338
 339                 gfs2_qd_dispose(qd);
 340                 return;
 341         }
 342
 343         qd->qd_lockref.count = 0;
 344         list_lru_add_obj(&gfs2_qd_lru, &qd->qd_lru);
 345         spin_unlock(&qd->qd_lockref.lock);
 346 }
 347
 348 static int slot_get(struct gfs2_quota_data *qd)
 349 {
 350         struct gfs2_sbd *sdp = qd->qd_sbd;
 351         unsigned int bit;
 352         int error = 0;
 353
 354         spin_lock(&sdp->sd_bitmap_lock);
 355         if (qd->qd_slot_ref == 0) {
 356                 bit = find_first_zero_bit(sdp->sd_quota_bitmap,
 357                                           sdp->sd_quota_slots);
 358                 if (bit >= sdp->sd_quota_slots) {
 359                         error = -ENOSPC;
 360                         goto out;
 361                 }
 362                 set_bit(bit, sdp->sd_quota_bitmap);
 363                 qd->qd_slot = bit;
 364         }
 365         qd->qd_slot_ref++;
 366 out:
 367         spin_unlock(&sdp->sd_bitmap_lock);
 368         return error;
 369 }
 370
 371 static void slot_hold(struct gfs2_quota_data *qd)
 372 {
 373         struct gfs2_sbd *sdp = qd->qd_sbd;
 374
 375         spin_lock(&sdp->sd_bitmap_lock);
 376         gfs2_assert(sdp, qd->qd_slot_ref);
 377         qd->qd_slot_ref++;
 378         spin_unlock(&sdp->sd_bitmap_lock);
 379 }
 380
 381 static void slot_put(struct gfs2_quota_data *qd)
 382 {
 383         struct gfs2_sbd *sdp = qd->qd_sbd;
 384
 385         spin_lock(&sdp->sd_bitmap_lock);
 386         gfs2_assert(sdp, qd->qd_slot_ref);
 387         if (!--qd->qd_slot_ref) {
 388                 BUG_ON(!test_and_clear_bit(qd->qd_slot, sdp->sd_quota_bitmap));
 389                 qd->qd_slot = -1;
 390         }
 391         spin_unlock(&sdp->sd_bitmap_lock);
 392 }
 393
 394 static int bh_get(struct gfs2_quota_data *qd)
 395 {
 396         struct gfs2_sbd *sdp = qd->qd_sbd;
 397         struct inode *inode = sdp->sd_qc_inode;
 398         struct gfs2_inode *ip = GFS2_I(inode);
 399         unsigned int block, offset;
 400         struct buffer_head *bh = NULL;
 401         struct iomap iomap = { };
 402         int error;
 403
 404         spin_lock(&qd->qd_lockref.lock);
 405         if (qd->qd_bh_count) {
 406                 qd->qd_bh_count++;
 407                 spin_unlock(&qd->qd_lockref.lock);
 408                 return 0;
 409         }
 410         spin_unlock(&qd->qd_lockref.lock);
 411
 412         block = qd->qd_slot / sdp->sd_qc_per_block;
 413         offset = qd->qd_slot % sdp->sd_qc_per_block;
 414
 415         error = gfs2_iomap_get(inode,
 416                                (loff_t)block << inode->i_blkbits,
 417                                i_blocksize(inode), &iomap);
 418         if (error)
 419                 return error;
 420         error = -ENOENT;
 421         if (iomap.type != IOMAP_MAPPED)
 422                 return error;
 423
 424         error = gfs2_meta_read(ip->i_gl, iomap.addr >> inode->i_blkbits,
 425                                DIO_WAIT, 0, &bh);
 426         if (error)
 427                 return error;
 428         error = -EIO;
 429         if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
 430                 goto out;
 431
 432         spin_lock(&qd->qd_lockref.lock);
 433         if (qd->qd_bh == NULL) {
 434                 qd->qd_bh = bh;
 435                 qd->qd_bh_qc = (struct gfs2_quota_change *)
 436                         (bh->b_data + sizeof(struct gfs2_meta_header) +
 437                          offset * sizeof(struct gfs2_quota_change));
 438                 bh = NULL;
 439         }
 440         qd->qd_bh_count++;
 441         spin_unlock(&qd->qd_lockref.lock);
 442         error = 0;
 443
 444 out:
 445         brelse(bh);
 446         return error;
 447 }
 448
 449 static void bh_put(struct gfs2_quota_data *qd)
 450 {
 451         struct gfs2_sbd *sdp = qd->qd_sbd;
 452         struct buffer_head *bh = NULL;
 453
 454         spin_lock(&qd->qd_lockref.lock);
 455         gfs2_assert(sdp, qd->qd_bh_count);
 456         if (!--qd->qd_bh_count) {
 457                 bh = qd->qd_bh;
 458                 qd->qd_bh = NULL;
 459                 qd->qd_bh_qc = NULL;
 460         }
 461         spin_unlock(&qd->qd_lockref.lock);
 462         brelse(bh);
 463 }
 464
 465 static bool qd_grab_sync(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd,
 466                          u64 sync_gen)
 467 {
 468         bool ret = false;
 469
 470         spin_lock(&qd->qd_lockref.lock);
 471         if (test_bit(QDF_LOCKED, &qd->qd_flags) ||
 472             !test_bit(QDF_CHANGE, &qd->qd_flags) ||
 473             qd->qd_sync_gen >= sync_gen)
 474                 goto out;
 475
 476         if (__lockref_is_dead(&qd->qd_lockref))
 477                 goto out;
 478         qd->qd_lockref.count++;
 479
 480         list_move_tail(&qd->qd_list, &sdp->sd_quota_list);
 481         set_bit(QDF_LOCKED, &qd->qd_flags);
 482         qd->qd_change_sync = qd->qd_change;
 483         slot_hold(qd);
 484         ret = true;
 485
 486 out:
 487         spin_unlock(&qd->qd_lockref.lock);
 488         return ret;
 489 }
 490
 491 static void qd_ungrab_sync(struct gfs2_quota_data *qd)
 492 {
 493         clear_bit(QDF_LOCKED, &qd->qd_flags);
 494         slot_put(qd);
 495         qd_put(qd);
 496 }
 497
 498 static void qdsb_put(struct gfs2_quota_data *qd)
 499 {
 500         bh_put(qd);
 501         slot_put(qd);
 502         qd_put(qd);
 503 }
 504
 505 static void qd_unlock(struct gfs2_quota_data *qd)
 506 {
 507         spin_lock(&qd->qd_lockref.lock);
 508         gfs2_assert_warn(qd->qd_sbd, test_bit(QDF_LOCKED, &qd->qd_flags));
 509         clear_bit(QDF_LOCKED, &qd->qd_flags);
 510         spin_unlock(&qd->qd_lockref.lock);
 511         qdsb_put(qd);
 512 }
 513
 514 static int qdsb_get(struct gfs2_sbd *sdp, struct kqid qid,
 515                     struct gfs2_quota_data **qdp)
 516 {
 517         int error;
 518
 519         error = qd_get(sdp, qid, qdp);
 520         if (error)
 521                 return error;
 522
 523         error = slot_get(*qdp);
 524         if (error)
 525                 goto fail;
 526
 527         error = bh_get(*qdp);
 528         if (error)
 529                 goto fail_slot;
 530
 531         return 0;
 532
 533 fail_slot:
 534         slot_put(*qdp);
 535 fail:
 536         qd_put(*qdp);
 537         return error;
 538 }
 539
 540 /**
 541  * gfs2_qa_get - make sure we have a quota allocations data structure,
 542  *               if necessary
 543  * @ip: the inode for this reservation
 544  */
 545 int gfs2_qa_get(struct gfs2_inode *ip)
 546 {
 547         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 548         struct inode *inode = &ip->i_inode;
 549
 550         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
 551                 return 0;
 552
 553         spin_lock(&inode->i_lock);
 554         if (ip->i_qadata == NULL) {
 555                 struct gfs2_qadata *tmp;
 556
 557                 spin_unlock(&inode->i_lock);
 558                 tmp = kmem_cache_zalloc(gfs2_qadata_cachep, GFP_NOFS);
 559                 if (!tmp)
 560                         return -ENOMEM;
 561
 562                 spin_lock(&inode->i_lock);
 563                 if (ip->i_qadata == NULL)
 564                         ip->i_qadata = tmp;
 565                 else
 566                         kmem_cache_free(gfs2_qadata_cachep, tmp);
 567         }
 568         ip->i_qadata->qa_ref++;
 569         spin_unlock(&inode->i_lock);
 570         return 0;
 571 }
 572
 573 void gfs2_qa_put(struct gfs2_inode *ip)
 574 {
 575         struct inode *inode = &ip->i_inode;
 576
 577         spin_lock(&inode->i_lock);
 578         if (ip->i_qadata && --ip->i_qadata->qa_ref == 0) {
 579                 kmem_cache_free(gfs2_qadata_cachep, ip->i_qadata);
 580                 ip->i_qadata = NULL;
 581         }
 582         spin_unlock(&inode->i_lock);
 583 }
 584
 585 int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
 586 {
 587         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 588         struct gfs2_quota_data **qd;
 589         int error;
 590
 591         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
 592                 return 0;
 593
 594         error = gfs2_qa_get(ip);
 595         if (error)
 596                 return error;
 597
 598         qd = ip->i_qadata->qa_qd;
 599
 600         if (gfs2_assert_warn(sdp, !ip->i_qadata->qa_qd_num) ||
 601             gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags))) {
 602                 error = -EIO;
 603                 gfs2_qa_put(ip);
 604                 goto out;
 605         }
 606
 607         error = qdsb_get(sdp, make_kqid_uid(ip->i_inode.i_uid), qd);
 608         if (error)
 609                 goto out_unhold;
 610         ip->i_qadata->qa_qd_num++;
 611         qd++;
 612
 613         error = qdsb_get(sdp, make_kqid_gid(ip->i_inode.i_gid), qd);
 614         if (error)
 615                 goto out_unhold;
 616         ip->i_qadata->qa_qd_num++;
 617         qd++;
 618
 619         if (!uid_eq(uid, NO_UID_QUOTA_CHANGE) &&
 620             !uid_eq(uid, ip->i_inode.i_uid)) {
 621                 error = qdsb_get(sdp, make_kqid_uid(uid), qd);
 622                 if (error)
 623                         goto out_unhold;
 624                 ip->i_qadata->qa_qd_num++;
 625                 qd++;
 626         }
 627
 628         if (!gid_eq(gid, NO_GID_QUOTA_CHANGE) &&
 629             !gid_eq(gid, ip->i_inode.i_gid)) {
 630                 error = qdsb_get(sdp, make_kqid_gid(gid), qd);
 631                 if (error)
 632                         goto out_unhold;
 633                 ip->i_qadata->qa_qd_num++;
 634                 qd++;
 635         }
 636
 637 out_unhold:
 638         if (error)
 639                 gfs2_quota_unhold(ip);
 640 out:
 641         return error;
 642 }
 643
 644 void gfs2_quota_unhold(struct gfs2_inode *ip)
 645 {
 646         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 647         u32 x;
 648
 649         if (ip->i_qadata == NULL)
 650                 return;
 651
 652         gfs2_assert_warn(sdp, !test_bit(GIF_QD_LOCKED, &ip->i_flags));
 653
 654         for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
 655                 qdsb_put(ip->i_qadata->qa_qd[x]);
 656                 ip->i_qadata->qa_qd[x] = NULL;
 657         }
 658         ip->i_qadata->qa_qd_num = 0;
 659         gfs2_qa_put(ip);
 660 }
 661
 662 static int sort_qd(const void *a, const void *b)
 663 {
 664         const struct gfs2_quota_data *qd_a = *(const struct gfs2_quota_data **)a;
 665         const struct gfs2_quota_data *qd_b = *(const struct gfs2_quota_data **)b;
 666
 667         if (qid_lt(qd_a->qd_id, qd_b->qd_id))
 668                 return -1;
 669         if (qid_lt(qd_b->qd_id, qd_a->qd_id))
 670                 return 1;
 671         return 0;
 672 }
 673
 674 static void do_qc(struct gfs2_quota_data *qd, s64 change)
 675 {
 676         struct gfs2_sbd *sdp = qd->qd_sbd;
 677         struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
 678         struct gfs2_quota_change *qc = qd->qd_bh_qc;
 679         bool needs_put = false;
 680         s64 x;
 681
 682         gfs2_trans_add_meta(ip->i_gl, qd->qd_bh);
 683
 684         /*
 685          * The QDF_CHANGE flag indicates that the slot in the quota change file
 686          * is used.  Here, we use the value of qc->qc_change when the slot is
 687          * used, and we assume a value of 0 otherwise.
 688          */
 689
 690         spin_lock(&qd->qd_lockref.lock);
 691
 692         x = 0;
 693         if (test_bit(QDF_CHANGE, &qd->qd_flags))
 694                 x = be64_to_cpu(qc->qc_change);
 695         x += change;
 696         qd->qd_change += change;
 697
 698         if (!x && test_bit(QDF_CHANGE, &qd->qd_flags)) {
 699                 /* The slot in the quota change file becomes unused. */
 700                 clear_bit(QDF_CHANGE, &qd->qd_flags);
 701                 qc->qc_flags = 0;
 702                 qc->qc_id = 0;
 703                 needs_put = true;
 704         } else if (x && !test_bit(QDF_CHANGE, &qd->qd_flags)) {
 705                 /* The slot in the quota change file becomes used. */
 706                 set_bit(QDF_CHANGE, &qd->qd_flags);
 707                 __qd_hold(qd);
 708                 slot_hold(qd);
 709
 710                 qc->qc_flags = 0;
 711                 if (qd->qd_id.type == USRQUOTA)
 712                         qc->qc_flags = cpu_to_be32(GFS2_QCF_USER);
 713                 qc->qc_id = cpu_to_be32(from_kqid(&init_user_ns, qd->qd_id));
 714         }
 715         qc->qc_change = cpu_to_be64(x);
 716
 717         spin_unlock(&qd->qd_lockref.lock);
 718
 719         if (needs_put) {
 720                 slot_put(qd);
 721                 qd_put(qd);
 722         }
 723         if (change < 0) /* Reset quiet flag if we freed some blocks */
 724                 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
 725 }
 726
 727 static int gfs2_write_buf_to_page(struct gfs2_sbd *sdp, unsigned long index,
 728                                   unsigned off, void *buf, unsigned bytes)
 729 {
 730         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
 731         struct inode *inode = &ip->i_inode;
 732         struct address_space *mapping = inode->i_mapping;
 733         struct folio *folio;
 734         struct buffer_head *bh;
 735         u64 blk;
 736         unsigned bsize = sdp->sd_sb.sb_bsize, bnum = 0, boff = 0;
 737         unsigned to_write = bytes, pg_off = off;
 738
 739         blk = index << (PAGE_SHIFT - sdp->sd_sb.sb_bsize_shift);
 740         boff = off % bsize;
 741
 742         folio = filemap_grab_folio(mapping, index);
 743         if (IS_ERR(folio))
 744                 return PTR_ERR(folio);
 745         bh = folio_buffers(folio);
 746         if (!bh)
 747                 bh = create_empty_buffers(folio, bsize, 0);
 748
 749         for (;;) {
 750                 /* Find the beginning block within the folio */
 751                 if (pg_off >= ((bnum * bsize) + bsize)) {
 752                         bh = bh->b_this_page;
 753                         bnum++;
 754                         blk++;
 755                         continue;
 756                 }
 757                 if (!buffer_mapped(bh)) {
 758                         gfs2_block_map(inode, blk, bh, 1);
 759                         if (!buffer_mapped(bh))
 760                                 goto unlock_out;
 761                         /* If it's a newly allocated disk block, zero it */
 762                         if (buffer_new(bh))
 763                                 folio_zero_range(folio, bnum * bsize,
 764                                                 bh->b_size);
 765                 }
 766                 if (folio_test_uptodate(folio))
 767                         set_buffer_uptodate(bh);
 768                 if (bh_read(bh, REQ_META | REQ_PRIO) < 0)
 769                         goto unlock_out;
 770                 gfs2_trans_add_data(ip->i_gl, bh);
 771
 772                 /* If we need to write to the next block as well */
 773                 if (to_write > (bsize - boff)) {
 774                         pg_off += (bsize - boff);
 775                         to_write -= (bsize - boff);
 776                         boff = pg_off % bsize;
 777                         continue;
 778                 }
 779                 break;
 780         }
 781
 782         /* Write to the folio, now that we have setup the buffer(s) */
 783         memcpy_to_folio(folio, off, buf, bytes);
 784         flush_dcache_folio(folio);
 785         folio_unlock(folio);
 786         folio_put(folio);
 787
 788         return 0;
 789
 790 unlock_out:
 791         folio_unlock(folio);
 792         folio_put(folio);
 793         return -EIO;
 794 }
 795
 796 static int gfs2_write_disk_quota(struct gfs2_sbd *sdp, struct gfs2_quota *qp,
 797                                  loff_t loc)
 798 {
 799         unsigned long pg_beg;
 800         unsigned pg_off, nbytes, overflow = 0;
 801         int error;
 802         void *ptr;
 803
 804         nbytes = sizeof(struct gfs2_quota);
 805
 806         pg_beg = loc >> PAGE_SHIFT;
 807         pg_off = offset_in_page(loc);
 808
 809         /* If the quota straddles a page boundary, split the write in two */
 810         if ((pg_off + nbytes) > PAGE_SIZE)
 811                 overflow = (pg_off + nbytes) - PAGE_SIZE;
 812
 813         ptr = qp;
 814         error = gfs2_write_buf_to_page(sdp, pg_beg, pg_off, ptr,
 815                                        nbytes - overflow);
 816         /* If there's an overflow, write the remaining bytes to the next page */
 817         if (!error && overflow)
 818                 error = gfs2_write_buf_to_page(sdp, pg_beg + 1, 0,
 819                                                ptr + nbytes - overflow,
 820                                                overflow);
 821         return error;
 822 }
 823
 824 /**
 825  * gfs2_adjust_quota - adjust record of current block usage
 826  * @sdp: The superblock
 827  * @loc: Offset of the entry in the quota file
 828  * @change: The amount of usage change to record
 829  * @qd: The quota data
 830  * @fdq: The updated limits to record
 831  *
 832  * This function was mostly borrowed from gfs2_block_truncate_page which was
 833  * in turn mostly borrowed from ext3
 834  *
 835  * Returns: 0 or -ve on error
 836  */
 837
 838 static int gfs2_adjust_quota(struct gfs2_sbd *sdp, loff_t loc,
 839                              s64 change, struct gfs2_quota_data *qd,
 840                              struct qc_dqblk *fdq)
 841 {
 842         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
 843         struct inode *inode = &ip->i_inode;
 844         struct gfs2_quota q;
 845         int err;
 846         u64 size;
 847
 848         if (gfs2_is_stuffed(ip)) {
 849                 err = gfs2_unstuff_dinode(ip);
 850                 if (err)
 851                         return err;
 852         }
 853
 854         memset(&q, 0, sizeof(struct gfs2_quota));
 855         err = gfs2_internal_read(ip, (char *)&q, &loc, sizeof(q));
 856         if (err < 0)
 857                 return err;
 858
 859         loc -= sizeof(q); /* gfs2_internal_read would've advanced the loc ptr */
 860         be64_add_cpu(&q.qu_value, change);
 861         if (((s64)be64_to_cpu(q.qu_value)) < 0)
 862                 q.qu_value = 0; /* Never go negative on quota usage */
 863         spin_lock(&qd->qd_lockref.lock);
 864         qd->qd_qb.qb_value = q.qu_value;
 865         if (fdq) {
 866                 if (fdq->d_fieldmask & QC_SPC_SOFT) {
 867                         q.qu_warn = cpu_to_be64(fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift);
 868                         qd->qd_qb.qb_warn = q.qu_warn;
 869                 }
 870                 if (fdq->d_fieldmask & QC_SPC_HARD) {
 871                         q.qu_limit = cpu_to_be64(fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift);
 872                         qd->qd_qb.qb_limit = q.qu_limit;
 873                 }
 874                 if (fdq->d_fieldmask & QC_SPACE) {
 875                         q.qu_value = cpu_to_be64(fdq->d_space >> sdp->sd_sb.sb_bsize_shift);
 876                         qd->qd_qb.qb_value = q.qu_value;
 877                 }
 878         }
 879         spin_unlock(&qd->qd_lockref.lock);
 880
 881         err = gfs2_write_disk_quota(sdp, &q, loc);
 882         if (!err) {
 883                 size = loc + sizeof(struct gfs2_quota);
 884                 if (size > inode->i_size)
 885                         i_size_write(inode, size);
 886                 inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 887                 mark_inode_dirty(inode);
 888                 set_bit(QDF_REFRESH, &qd->qd_flags);
 889         }
 890
 891         return err;
 892 }
 893
 894 static int do_sync(unsigned int num_qd, struct gfs2_quota_data **qda,
 895                    u64 sync_gen)
 896 {
 897         struct gfs2_sbd *sdp = (*qda)->qd_sbd;
 898         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
 899         struct gfs2_alloc_parms ap = {};
 900         unsigned int data_blocks, ind_blocks;
 901         struct gfs2_holder *ghs, i_gh;
 902         unsigned int qx, x;
 903         struct gfs2_quota_data *qd;
 904         unsigned reserved;
 905         loff_t offset;
 906         unsigned int nalloc = 0, blocks;
 907         int error;
 908
 909         gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
 910                               &data_blocks, &ind_blocks);
 911
 912         ghs = kmalloc_array(num_qd, sizeof(struct gfs2_holder), GFP_NOFS);
 913         if (!ghs)
 914                 return -ENOMEM;
 915
 916         sort(qda, num_qd, sizeof(struct gfs2_quota_data *), sort_qd, NULL);
 917         inode_lock(&ip->i_inode);
 918         for (qx = 0; qx < num_qd; qx++) {
 919                 error = gfs2_glock_nq_init(qda[qx]->qd_gl, LM_ST_EXCLUSIVE,
 920                                            GL_NOCACHE, &ghs[qx]);
 921                 if (error)
 922                         goto out_dq;
 923         }
 924
 925         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
 926         if (error)
 927                 goto out_dq;
 928
 929         for (x = 0; x < num_qd; x++) {
 930                 offset = qd2offset(qda[x]);
 931                 if (gfs2_write_alloc_required(ip, offset,
 932                                               sizeof(struct gfs2_quota)))
 933                         nalloc++;
 934         }
 935
 936         /*
 937          * 1 blk for unstuffing inode if stuffed. We add this extra
 938          * block to the reservation unconditionally. If the inode
 939          * doesn't need unstuffing, the block will be released to the
 940          * rgrp since it won't be allocated during the transaction
 941          */
 942         /* +3 in the end for unstuffing block, inode size update block
 943          * and another block in case quota straddles page boundary and
 944          * two blocks need to be updated instead of 1 */
 945         blocks = num_qd * data_blocks + RES_DINODE + num_qd + 3;
 946
 947         reserved = 1 + (nalloc * (data_blocks + ind_blocks));
 948         ap.target = reserved;
 949         error = gfs2_inplace_reserve(ip, &ap);
 950         if (error)
 951                 goto out_alloc;
 952
 953         if (nalloc)
 954                 blocks += gfs2_rg_blocks(ip, reserved) + nalloc * ind_blocks + RES_STATFS;
 955
 956         error = gfs2_trans_begin(sdp, blocks, 0);
 957         if (error)
 958                 goto out_ipres;
 959
 960         for (x = 0; x < num_qd; x++) {
 961                 qd = qda[x];
 962                 offset = qd2offset(qd);
 963                 error = gfs2_adjust_quota(sdp, offset, qd->qd_change_sync, qd,
 964                                                         NULL);
 965                 if (error)
 966                         goto out_end_trans;
 967
 968                 do_qc(qd, -qd->qd_change_sync);
 969                 set_bit(QDF_REFRESH, &qd->qd_flags);
 970         }
 971
 972 out_end_trans:
 973         gfs2_trans_end(sdp);
 974 out_ipres:
 975         gfs2_inplace_release(ip);
 976 out_alloc:
 977         gfs2_glock_dq_uninit(&i_gh);
 978 out_dq:
 979         while (qx--)
 980                 gfs2_glock_dq_uninit(&ghs[qx]);
 981         inode_unlock(&ip->i_inode);
 982         kfree(ghs);
 983         gfs2_log_flush(ip->i_gl->gl_name.ln_sbd, ip->i_gl,
 984                        GFS2_LOG_HEAD_FLUSH_NORMAL | GFS2_LFC_DO_SYNC);
 985         if (!error) {
 986                 for (x = 0; x < num_qd; x++) {
 987                         qd = qda[x];
 988                         spin_lock(&qd->qd_lockref.lock);
 989                         if (qd->qd_sync_gen < sync_gen)
 990                                 qd->qd_sync_gen = sync_gen;
 991                         spin_unlock(&qd->qd_lockref.lock);
 992                 }
 993         }
 994         return error;
 995 }
 996
 997 static int update_qd(struct gfs2_sbd *sdp, struct gfs2_quota_data *qd)
 998 {
 999         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1000         struct gfs2_quota q;
1001         struct gfs2_quota_lvb *qlvb;
1002         loff_t pos;
1003         int error;
1004
1005         memset(&q, 0, sizeof(struct gfs2_quota));
1006         pos = qd2offset(qd);
1007         error = gfs2_internal_read(ip, (char *)&q, &pos, sizeof(q));
1008         if (error < 0)
1009                 return error;
1010
1011         qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1012         qlvb->qb_magic = cpu_to_be32(GFS2_MAGIC);
1013         qlvb->__pad = 0;
1014         qlvb->qb_limit = q.qu_limit;
1015         qlvb->qb_warn = q.qu_warn;
1016         qlvb->qb_value = q.qu_value;
1017         spin_lock(&qd->qd_lockref.lock);
1018         qd->qd_qb = *qlvb;
1019         spin_unlock(&qd->qd_lockref.lock);
1020
1021         return 0;
1022 }
1023
1024 static int do_glock(struct gfs2_quota_data *qd, int force_refresh,
1025                     struct gfs2_holder *q_gh)
1026 {
1027         struct gfs2_sbd *sdp = qd->qd_sbd;
1028         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1029         struct gfs2_holder i_gh;
1030         int error;
1031
1032         gfs2_assert_warn(sdp, sdp == qd->qd_gl->gl_name.ln_sbd);
1033 restart:
1034         error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_SHARED, 0, q_gh);
1035         if (error)
1036                 return error;
1037
1038         if (test_and_clear_bit(QDF_REFRESH, &qd->qd_flags))
1039                 force_refresh = FORCE;
1040
1041         spin_lock(&qd->qd_lockref.lock);
1042         qd->qd_qb = *(struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1043         spin_unlock(&qd->qd_lockref.lock);
1044
1045         if (force_refresh || qd->qd_qb.qb_magic != cpu_to_be32(GFS2_MAGIC)) {
1046                 gfs2_glock_dq_uninit(q_gh);
1047                 error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE,
1048                                            GL_NOCACHE, q_gh);
1049                 if (error)
1050                         return error;
1051
1052                 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1053                 if (error)
1054                         goto fail;
1055
1056                 error = update_qd(sdp, qd);
1057                 if (error)
1058                         goto fail_gunlock;
1059
1060                 gfs2_glock_dq_uninit(&i_gh);
1061                 gfs2_glock_dq_uninit(q_gh);
1062                 force_refresh = 0;
1063                 goto restart;
1064         }
1065
1066         return 0;
1067
1068 fail_gunlock:
1069         gfs2_glock_dq_uninit(&i_gh);
1070 fail:
1071         gfs2_glock_dq_uninit(q_gh);
1072         return error;
1073 }
1074
1075 int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid)
1076 {
1077         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1078         struct gfs2_quota_data *qd;
1079         u32 x;
1080         int error;
1081
1082         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1083                 return 0;
1084
1085         error = gfs2_quota_hold(ip, uid, gid);
1086         if (error)
1087                 return error;
1088
1089         sort(ip->i_qadata->qa_qd, ip->i_qadata->qa_qd_num,
1090              sizeof(struct gfs2_quota_data *), sort_qd, NULL);
1091
1092         for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1093                 qd = ip->i_qadata->qa_qd[x];
1094                 error = do_glock(qd, NO_FORCE, &ip->i_qadata->qa_qd_ghs[x]);
1095                 if (error)
1096                         break;
1097         }
1098
1099         if (!error)
1100                 set_bit(GIF_QD_LOCKED, &ip->i_flags);
1101         else {
1102                 while (x--)
1103                         gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1104                 gfs2_quota_unhold(ip);
1105         }
1106
1107         return error;
1108 }
1109
1110 static bool need_sync(struct gfs2_quota_data *qd)
1111 {
1112         struct gfs2_sbd *sdp = qd->qd_sbd;
1113         struct gfs2_tune *gt = &sdp->sd_tune;
1114         s64 value, change, limit;
1115         unsigned int num, den;
1116         int ret = false;
1117
1118         spin_lock(&qd->qd_lockref.lock);
1119         if (!qd->qd_qb.qb_limit)
1120                 goto out;
1121
1122         change = qd->qd_change;
1123         if (change <= 0)
1124                 goto out;
1125         value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1126         limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1127         if (value >= limit)
1128                 goto out;
1129
1130         spin_lock(&gt->gt_spin);
1131         num = gt->gt_quota_scale_num;
1132         den = gt->gt_quota_scale_den;
1133         spin_unlock(&gt->gt_spin);
1134
1135         change *= gfs2_jindex_size(sdp) * num;
1136         change = div_s64(change, den);
1137         if (value + change < limit)
1138                 goto out;
1139
1140         ret = true;
1141 out:
1142         spin_unlock(&qd->qd_lockref.lock);
1143         return ret;
1144 }
1145
1146 void gfs2_quota_unlock(struct gfs2_inode *ip)
1147 {
1148         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1149         struct gfs2_quota_data *qda[2 * GFS2_MAXQUOTAS];
1150         unsigned int count = 0;
1151         u32 x;
1152
1153         if (!test_and_clear_bit(GIF_QD_LOCKED, &ip->i_flags))
1154                 return;
1155
1156         for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1157                 struct gfs2_quota_data *qd;
1158                 bool sync;
1159                 int error;
1160
1161                 qd = ip->i_qadata->qa_qd[x];
1162                 sync = need_sync(qd);
1163
1164                 gfs2_glock_dq_uninit(&ip->i_qadata->qa_qd_ghs[x]);
1165                 if (!sync)
1166                         continue;
1167
1168                 spin_lock(&qd_lock);
1169                 sync = qd_grab_sync(sdp, qd, U64_MAX);
1170                 spin_unlock(&qd_lock);
1171
1172                 if (!sync)
1173                         continue;
1174
1175                 gfs2_assert_warn(sdp, qd->qd_change_sync);
1176                 error = bh_get(qd);
1177                 if (error) {
1178                         qd_ungrab_sync(qd);
1179                         continue;
1180                 }
1181
1182                 qda[count++] = qd;
1183         }
1184
1185         if (count) {
1186                 u64 sync_gen = READ_ONCE(sdp->sd_quota_sync_gen);
1187
1188                 do_sync(count, qda, sync_gen);
1189                 for (x = 0; x < count; x++)
1190                         qd_unlock(qda[x]);
1191         }
1192
1193         gfs2_quota_unhold(ip);
1194 }
1195
1196 #define MAX_LINE 256
1197
1198 static void print_message(struct gfs2_quota_data *qd, char *type)
1199 {
1200         struct gfs2_sbd *sdp = qd->qd_sbd;
1201
1202         if (sdp->sd_args.ar_quota != GFS2_QUOTA_QUIET) {
1203                 fs_info(sdp, "quota %s for %s %u\n",
1204                         type,
1205                         (qd->qd_id.type == USRQUOTA) ? "user" : "group",
1206                         from_kqid(&init_user_ns, qd->qd_id));
1207         }
1208 }
1209
1210 /**
1211  * gfs2_quota_check - check if allocating new blocks will exceed quota
1212  * @ip:  The inode for which this check is being performed
1213  * @uid: The uid to check against
1214  * @gid: The gid to check against
1215  * @ap:  The allocation parameters. ap->target contains the requested
1216  *       blocks. ap->min_target, if set, contains the minimum blks
1217  *       requested.
1218  *
1219  * Returns: 0 on success.
1220  *                  min_req = ap->min_target ? ap->min_target : ap->target;
1221  *                  quota must allow at least min_req blks for success and
1222  *                  ap->allowed is set to the number of blocks allowed
1223  *
1224  *          -EDQUOT otherwise, quota violation. ap->allowed is set to number
1225  *                  of blocks available.
1226  */
1227 int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
1228                      struct gfs2_alloc_parms *ap)
1229 {
1230         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1231         struct gfs2_quota_data *qd;
1232         s64 value, warn, limit;
1233         u32 x;
1234         int error = 0;
1235
1236         ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
1237         if (!test_bit(GIF_QD_LOCKED, &ip->i_flags))
1238                 return 0;
1239
1240         for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1241                 qd = ip->i_qadata->qa_qd[x];
1242
1243                 if (!(qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1244                       qid_eq(qd->qd_id, make_kqid_gid(gid))))
1245                         continue;
1246
1247                 spin_lock(&qd->qd_lockref.lock);
1248                 warn = (s64)be64_to_cpu(qd->qd_qb.qb_warn);
1249                 limit = (s64)be64_to_cpu(qd->qd_qb.qb_limit);
1250                 value = (s64)be64_to_cpu(qd->qd_qb.qb_value);
1251                 value += qd->qd_change;
1252                 spin_unlock(&qd->qd_lockref.lock);
1253
1254                 if (limit > 0 && (limit - value) < ap->allowed)
1255                         ap->allowed = limit - value;
1256                 /* If we can't meet the target */
1257                 if (limit && limit < (value + (s64)ap->target)) {
1258                         /* If no min_target specified or we don't meet
1259                          * min_target, return -EDQUOT */
1260                         if (!ap->min_target || ap->min_target > ap->allowed) {
1261                                 if (!test_and_set_bit(QDF_QMSG_QUIET,
1262                                                       &qd->qd_flags)) {
1263                                         print_message(qd, "exceeded");
1264                                         quota_send_warning(qd->qd_id,
1265                                                            sdp->sd_vfs->s_dev,
1266                                                            QUOTA_NL_BHARDWARN);
1267                                 }
1268                                 error = -EDQUOT;
1269                                 break;
1270                         }
1271                 } else if (warn && warn < value &&
1272                            time_after_eq(jiffies, qd->qd_last_warn +
1273                                          gfs2_tune_get(sdp, gt_quota_warn_period)
1274                                          * HZ)) {
1275                         quota_send_warning(qd->qd_id,
1276                                            sdp->sd_vfs->s_dev, QUOTA_NL_BSOFTWARN);
1277                         print_message(qd, "warning");
1278                         error = 0;
1279                         qd->qd_last_warn = jiffies;
1280                 }
1281         }
1282         return error;
1283 }
1284
1285 void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
1286                        kuid_t uid, kgid_t gid)
1287 {
1288         struct gfs2_quota_data *qd;
1289         u32 x;
1290         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1291
1292         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF ||
1293             gfs2_assert_warn(sdp, change))
1294                 return;
1295         if (ip->i_diskflags & GFS2_DIF_SYSTEM)
1296                 return;
1297
1298         if (gfs2_assert_withdraw(sdp, ip->i_qadata &&
1299                                  ip->i_qadata->qa_ref > 0))
1300                 return;
1301         for (x = 0; x < ip->i_qadata->qa_qd_num; x++) {
1302                 qd = ip->i_qadata->qa_qd[x];
1303
1304                 if (qid_eq(qd->qd_id, make_kqid_uid(uid)) ||
1305                     qid_eq(qd->qd_id, make_kqid_gid(gid))) {
1306                         do_qc(qd, change);
1307                 }
1308         }
1309 }
1310
1311 int gfs2_quota_sync(struct super_block *sb, int type)
1312 {
1313         struct gfs2_sbd *sdp = sb->s_fs_info;
1314         struct gfs2_quota_data **qda;
1315         unsigned int max_qd = PAGE_SIZE / sizeof(struct gfs2_holder);
1316         u64 sync_gen;
1317         int error = 0;
1318
1319         if (sb_rdonly(sdp->sd_vfs))
1320                 return 0;
1321
1322         qda = kcalloc(max_qd, sizeof(struct gfs2_quota_data *), GFP_KERNEL);
1323         if (!qda)
1324                 return -ENOMEM;
1325
1326         mutex_lock(&sdp->sd_quota_sync_mutex);
1327         sync_gen = sdp->sd_quota_sync_gen + 1;
1328
1329         do {
1330                 struct gfs2_quota_data *iter;
1331                 unsigned int num_qd = 0;
1332                 unsigned int x;
1333
1334                 spin_lock(&qd_lock);
1335                 list_for_each_entry(iter, &sdp->sd_quota_list, qd_list) {
1336                         if (qd_grab_sync(sdp, iter, sync_gen)) {
1337                                 qda[num_qd++] = iter;
1338                                 if (num_qd == max_qd)
1339                                         break;
1340                         }
1341                 }
1342                 spin_unlock(&qd_lock);
1343
1344                 if (!num_qd)
1345                         break;
1346
1347                 for (x = 0; x < num_qd; x++) {
1348                         error = bh_get(qda[x]);
1349                         if (!error)
1350                                 continue;
1351
1352                         while (x < num_qd)
1353                                 qd_ungrab_sync(qda[--num_qd]);
1354                         break;
1355                 }
1356
1357                 if (!error) {
1358                         WRITE_ONCE(sdp->sd_quota_sync_gen, sync_gen);
1359                         error = do_sync(num_qd, qda, sync_gen);
1360                 }
1361
1362                 for (x = 0; x < num_qd; x++)
1363                         qd_unlock(qda[x]);
1364         } while (!error);
1365
1366         mutex_unlock(&sdp->sd_quota_sync_mutex);
1367         kfree(qda);
1368
1369         return error;
1370 }
1371
1372 int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid)
1373 {
1374         struct gfs2_quota_data *qd;
1375         struct gfs2_holder q_gh;
1376         int error;
1377
1378         error = qd_get(sdp, qid, &qd);
1379         if (error)
1380                 return error;
1381
1382         error = do_glock(qd, FORCE, &q_gh);
1383         if (!error)
1384                 gfs2_glock_dq_uninit(&q_gh);
1385
1386         qd_put(qd);
1387         return error;
1388 }
1389
1390 int gfs2_quota_init(struct gfs2_sbd *sdp)
1391 {
1392         struct gfs2_inode *ip = GFS2_I(sdp->sd_qc_inode);
1393         u64 size = i_size_read(sdp->sd_qc_inode);
1394         unsigned int blocks = size >> sdp->sd_sb.sb_bsize_shift;
1395         unsigned int x, slot = 0;
1396         unsigned int found = 0;
1397         unsigned int hash;
1398         unsigned int bm_size;
1399         struct buffer_head *bh;
1400         u64 dblock;
1401         u32 extlen = 0;
1402         int error;
1403
1404         if (gfs2_check_internal_file_size(sdp->sd_qc_inode, 1, 64 << 20))
1405                 return -EIO;
1406
1407         sdp->sd_quota_slots = blocks * sdp->sd_qc_per_block;
1408         bm_size = DIV_ROUND_UP(sdp->sd_quota_slots, 8 * sizeof(unsigned long));
1409         bm_size *= sizeof(unsigned long);
1410         error = -ENOMEM;
1411         sdp->sd_quota_bitmap = kzalloc(bm_size, GFP_NOFS | __GFP_NOWARN);
1412         if (sdp->sd_quota_bitmap == NULL)
1413                 sdp->sd_quota_bitmap = __vmalloc(bm_size, GFP_NOFS |
1414                                                  __GFP_ZERO);
1415         if (!sdp->sd_quota_bitmap)
1416                 return error;
1417
1418         for (x = 0; x < blocks; x++) {
1419                 struct gfs2_quota_change *qc;
1420                 unsigned int y;
1421
1422                 if (!extlen) {
1423                         extlen = 32;
1424                         error = gfs2_get_extent(&ip->i_inode, x, &dblock, &extlen);
1425                         if (error)
1426                                 goto fail;
1427                 }
1428                 error = -EIO;
1429                 bh = gfs2_meta_ra(ip->i_gl, dblock, extlen);
1430                 if (!bh)
1431                         goto fail;
1432                 if (gfs2_metatype_check(sdp, bh, GFS2_METATYPE_QC))
1433                         goto fail_brelse;
1434
1435                 qc = (struct gfs2_quota_change *)(bh->b_data + sizeof(struct gfs2_meta_header));
1436                 for (y = 0; y < sdp->sd_qc_per_block && slot < sdp->sd_quota_slots;
1437                      y++, slot++) {
1438                         struct gfs2_quota_data *old_qd, *qd;
1439                         s64 qc_change = be64_to_cpu(qc->qc_change);
1440                         u32 qc_flags = be32_to_cpu(qc->qc_flags);
1441                         enum quota_type qtype = (qc_flags & GFS2_QCF_USER) ?
1442                                                 USRQUOTA : GRPQUOTA;
1443                         struct kqid qc_id = make_kqid(&init_user_ns, qtype,
1444                                                       be32_to_cpu(qc->qc_id));
1445                         qc++;
1446                         if (!qc_change)
1447                                 continue;
1448
1449                         hash = gfs2_qd_hash(sdp, qc_id);
1450                         qd = qd_alloc(hash, sdp, qc_id);
1451                         if (qd == NULL)
1452                                 goto fail_brelse;
1453
1454                         set_bit(QDF_CHANGE, &qd->qd_flags);
1455                         qd->qd_change = qc_change;
1456                         qd->qd_slot = slot;
1457                         qd->qd_slot_ref = 1;
1458
1459                         spin_lock(&qd_lock);
1460                         spin_lock_bucket(hash);
1461                         old_qd = gfs2_qd_search_bucket(hash, sdp, qc_id);
1462                         if (old_qd) {
1463                                 fs_err(sdp, "Corruption found in quota_change%u"
1464                                             "file: duplicate identifier in "
1465                                             "slot %u\n",
1466                                             sdp->sd_jdesc->jd_jid, slot);
1467
1468                                 spin_unlock_bucket(hash);
1469                                 spin_unlock(&qd_lock);
1470                                 qd_put(old_qd);
1471
1472                                 gfs2_glock_put(qd->qd_gl);
1473                                 kmem_cache_free(gfs2_quotad_cachep, qd);
1474
1475                                 /* zero out the duplicate slot */
1476                                 lock_buffer(bh);
1477                                 memset(qc, 0, sizeof(*qc));
1478                                 mark_buffer_dirty(bh);
1479                                 unlock_buffer(bh);
1480
1481                                 continue;
1482                         }
1483                         BUG_ON(test_and_set_bit(slot, sdp->sd_quota_bitmap));
1484                         list_add(&qd->qd_list, &sdp->sd_quota_list);
1485                         atomic_inc(&sdp->sd_quota_count);
1486                         hlist_bl_add_head_rcu(&qd->qd_hlist, &qd_hash_table[hash]);
1487                         spin_unlock_bucket(hash);
1488                         spin_unlock(&qd_lock);
1489
1490                         found++;
1491                 }
1492
1493                 if (buffer_dirty(bh))
1494                         sync_dirty_buffer(bh);
1495                 brelse(bh);
1496                 dblock++;
1497                 extlen--;
1498         }
1499
1500         if (found)
1501                 fs_info(sdp, "found %u quota changes\n", found);
1502
1503         return 0;
1504
1505 fail_brelse:
1506         if (buffer_dirty(bh))
1507                 sync_dirty_buffer(bh);
1508         brelse(bh);
1509 fail:
1510         gfs2_quota_cleanup(sdp);
1511         return error;
1512 }
1513
1514 void gfs2_quota_cleanup(struct gfs2_sbd *sdp)
1515 {
1516         struct gfs2_quota_data *qd;
1517         LIST_HEAD(dispose);
1518         int count;
1519
1520         BUG_ON(!test_bit(SDF_NORECOVERY, &sdp->sd_flags) &&
1521                 test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags));
1522
1523         spin_lock(&qd_lock);
1524         list_for_each_entry(qd, &sdp->sd_quota_list, qd_list) {
1525                 spin_lock(&qd->qd_lockref.lock);
1526                 if (qd->qd_lockref.count != 0) {
1527                         spin_unlock(&qd->qd_lockref.lock);
1528                         continue;
1529                 }
1530                 lockref_mark_dead(&qd->qd_lockref);
1531                 spin_unlock(&qd->qd_lockref.lock);
1532
1533                 list_lru_del_obj(&gfs2_qd_lru, &qd->qd_lru);
1534                 list_add(&qd->qd_lru, &dispose);
1535         }
1536         spin_unlock(&qd_lock);
1537
1538         gfs2_qd_list_dispose(&dispose);
1539
1540         wait_event_timeout(sdp->sd_kill_wait,
1541                 (count = atomic_read(&sdp->sd_quota_count)) == 0,
1542                 HZ * 60);
1543
1544         if (count != 0)
1545                 fs_err(sdp, "%d left-over quota data objects\n", count);
1546
1547         kvfree(sdp->sd_quota_bitmap);
1548         sdp->sd_quota_bitmap = NULL;
1549 }
1550
1551 static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
1552 {
1553         if (error == 0 || error == -EROFS)
1554                 return;
1555         if (!gfs2_withdrawing_or_withdrawn(sdp)) {
1556                 if (!cmpxchg(&sdp->sd_log_error, 0, error))
1557                         fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
1558                 wake_up(&sdp->sd_logd_waitq);
1559         }
1560 }
1561
1562 static void quotad_check_timeo(struct gfs2_sbd *sdp, const char *msg,
1563                                int (*fxn)(struct super_block *sb, int type),
1564                                unsigned long t, unsigned long *timeo,
1565                                unsigned int *new_timeo)
1566 {
1567         if (t >= *timeo) {
1568                 int error = fxn(sdp->sd_vfs, 0);
1569                 quotad_error(sdp, msg, error);
1570                 *timeo = gfs2_tune_get_i(&sdp->sd_tune, new_timeo) * HZ;
1571         } else {
1572                 *timeo -= t;
1573         }
1574 }
1575
1576 void gfs2_wake_up_statfs(struct gfs2_sbd *sdp) {
1577         if (!sdp->sd_statfs_force_sync) {
1578                 sdp->sd_statfs_force_sync = 1;
1579                 wake_up(&sdp->sd_quota_wait);
1580         }
1581 }
1582
1583
1584 /**
1585  * gfs2_quotad - Write cached quota changes into the quota file
1586  * @data: Pointer to GFS2 superblock
1587  *
1588  */
1589
1590 int gfs2_quotad(void *data)
1591 {
1592         struct gfs2_sbd *sdp = data;
1593         struct gfs2_tune *tune = &sdp->sd_tune;
1594         unsigned long statfs_timeo = 0;
1595         unsigned long quotad_timeo = 0;
1596         unsigned long t = 0;
1597
1598         set_freezable();
1599         while (!kthread_should_stop()) {
1600                 if (gfs2_withdrawing_or_withdrawn(sdp))
1601                         break;
1602
1603                 /* Update the master statfs file */
1604                 if (sdp->sd_statfs_force_sync) {
1605                         int error = gfs2_statfs_sync(sdp->sd_vfs, 0);
1606                         quotad_error(sdp, "statfs", error);
1607                         statfs_timeo = gfs2_tune_get(sdp, gt_statfs_quantum) * HZ;
1608                 }
1609                 else
1610                         quotad_check_timeo(sdp, "statfs", gfs2_statfs_sync, t,
1611                                            &statfs_timeo,
1612                                            &tune->gt_statfs_quantum);
1613
1614                 /* Update quota file */
1615                 quotad_check_timeo(sdp, "sync", gfs2_quota_sync, t,
1616                                    &quotad_timeo, &tune->gt_quota_quantum);
1617
1618                 t = min(quotad_timeo, statfs_timeo);
1619
1620                 t = wait_event_freezable_timeout(sdp->sd_quota_wait,
1621                                 sdp->sd_statfs_force_sync ||
1622                                 gfs2_withdrawing_or_withdrawn(sdp) ||
1623                                 kthread_should_stop(),
1624                                 t);
1625
1626                 if (sdp->sd_statfs_force_sync)
1627                         t = 0;
1628         }
1629
1630         return 0;
1631 }
1632
1633 static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
1634 {
1635         struct gfs2_sbd *sdp = sb->s_fs_info;
1636
1637         memset(state, 0, sizeof(*state));
1638
1639         switch (sdp->sd_args.ar_quota) {
1640         case GFS2_QUOTA_QUIET:
1641                 fallthrough;
1642         case GFS2_QUOTA_ON:
1643                 state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
1644                 state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
1645                 fallthrough;
1646         case GFS2_QUOTA_ACCOUNT:
1647                 state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
1648                                                   QCI_SYSFILE;
1649                 state->s_state[GRPQUOTA].flags |= QCI_ACCT_ENABLED |
1650                                                   QCI_SYSFILE;
1651                 break;
1652         case GFS2_QUOTA_OFF:
1653                 break;
1654         }
1655         if (sdp->sd_quota_inode) {
1656                 state->s_state[USRQUOTA].ino =
1657                                         GFS2_I(sdp->sd_quota_inode)->i_no_addr;
1658                 state->s_state[USRQUOTA].blocks = sdp->sd_quota_inode->i_blocks;
1659         }
1660         state->s_state[USRQUOTA].nextents = 1;  /* unsupported */
1661         state->s_state[GRPQUOTA] = state->s_state[USRQUOTA];
1662         state->s_incoredqs = list_lru_count(&gfs2_qd_lru);
1663         return 0;
1664 }
1665
1666 static int gfs2_get_dqblk(struct super_block *sb, struct kqid qid,
1667                           struct qc_dqblk *fdq)
1668 {
1669         struct gfs2_sbd *sdp = sb->s_fs_info;
1670         struct gfs2_quota_lvb *qlvb;
1671         struct gfs2_quota_data *qd;
1672         struct gfs2_holder q_gh;
1673         int error;
1674
1675         memset(fdq, 0, sizeof(*fdq));
1676
1677         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1678                 return -ESRCH; /* Crazy XFS error code */
1679
1680         if ((qid.type != USRQUOTA) &&
1681             (qid.type != GRPQUOTA))
1682                 return -EINVAL;
1683
1684         error = qd_get(sdp, qid, &qd);
1685         if (error)
1686                 return error;
1687         error = do_glock(qd, FORCE, &q_gh);
1688         if (error)
1689                 goto out;
1690
1691         qlvb = (struct gfs2_quota_lvb *)qd->qd_gl->gl_lksb.sb_lvbptr;
1692         fdq->d_spc_hardlimit = be64_to_cpu(qlvb->qb_limit) << sdp->sd_sb.sb_bsize_shift;
1693         fdq->d_spc_softlimit = be64_to_cpu(qlvb->qb_warn) << sdp->sd_sb.sb_bsize_shift;
1694         fdq->d_space = be64_to_cpu(qlvb->qb_value) << sdp->sd_sb.sb_bsize_shift;
1695
1696         gfs2_glock_dq_uninit(&q_gh);
1697 out:
1698         qd_put(qd);
1699         return error;
1700 }
1701
1702 /* GFS2 only supports a subset of the XFS fields */
1703 #define GFS2_FIELDMASK (QC_SPC_SOFT|QC_SPC_HARD|QC_SPACE)
1704
1705 static int gfs2_set_dqblk(struct super_block *sb, struct kqid qid,
1706                           struct qc_dqblk *fdq)
1707 {
1708         struct gfs2_sbd *sdp = sb->s_fs_info;
1709         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
1710         struct gfs2_quota_data *qd;
1711         struct gfs2_holder q_gh, i_gh;
1712         unsigned int data_blocks, ind_blocks;
1713         unsigned int blocks = 0;
1714         int alloc_required;
1715         loff_t offset;
1716         int error;
1717
1718         if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
1719                 return -ESRCH; /* Crazy XFS error code */
1720
1721         if ((qid.type != USRQUOTA) &&
1722             (qid.type != GRPQUOTA))
1723                 return -EINVAL;
1724
1725         if (fdq->d_fieldmask & ~GFS2_FIELDMASK)
1726                 return -EINVAL;
1727
1728         error = qd_get(sdp, qid, &qd);
1729         if (error)
1730                 return error;
1731
1732         error = gfs2_qa_get(ip);
1733         if (error)
1734                 goto out_put;
1735
1736         inode_lock(&ip->i_inode);
1737         error = gfs2_glock_nq_init(qd->qd_gl, LM_ST_EXCLUSIVE, 0, &q_gh);
1738         if (error)
1739                 goto out_unlockput;
1740         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1741         if (error)
1742                 goto out_q;
1743
1744         /* Check for existing entry, if none then alloc new blocks */
1745         error = update_qd(sdp, qd);
1746         if (error)
1747                 goto out_i;
1748
1749         /* If nothing has changed, this is a no-op */
1750         if ((fdq->d_fieldmask & QC_SPC_SOFT) &&
1751             ((fdq->d_spc_softlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_warn)))
1752                 fdq->d_fieldmask ^= QC_SPC_SOFT;
1753
1754         if ((fdq->d_fieldmask & QC_SPC_HARD) &&
1755             ((fdq->d_spc_hardlimit >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_limit)))
1756                 fdq->d_fieldmask ^= QC_SPC_HARD;
1757
1758         if ((fdq->d_fieldmask & QC_SPACE) &&
1759             ((fdq->d_space >> sdp->sd_sb.sb_bsize_shift) == be64_to_cpu(qd->qd_qb.qb_value)))
1760                 fdq->d_fieldmask ^= QC_SPACE;
1761
1762         if (fdq->d_fieldmask == 0)
1763                 goto out_i;
1764
1765         offset = qd2offset(qd);
1766         alloc_required = gfs2_write_alloc_required(ip, offset, sizeof(struct gfs2_quota));
1767         if (gfs2_is_stuffed(ip))
1768                 alloc_required = 1;
1769         if (alloc_required) {
1770                 struct gfs2_alloc_parms ap = {};
1771                 gfs2_write_calc_reserv(ip, sizeof(struct gfs2_quota),
1772                                        &data_blocks, &ind_blocks);
1773                 blocks = 1 + data_blocks + ind_blocks;
1774                 ap.target = blocks;
1775                 error = gfs2_inplace_reserve(ip, &ap);
1776                 if (error)
1777                         goto out_i;
1778                 blocks += gfs2_rg_blocks(ip, blocks);
1779         }
1780
1781         /* Some quotas span block boundaries and can update two blocks,
1782            adding an extra block to the transaction to handle such quotas */
1783         error = gfs2_trans_begin(sdp, blocks + RES_DINODE + 2, 0);
1784         if (error)
1785                 goto out_release;
1786
1787         /* Apply changes */
1788         error = gfs2_adjust_quota(sdp, offset, 0, qd, fdq);
1789         if (!error)
1790                 clear_bit(QDF_QMSG_QUIET, &qd->qd_flags);
1791
1792         gfs2_trans_end(sdp);
1793 out_release:
1794         if (alloc_required)
1795                 gfs2_inplace_release(ip);
1796 out_i:
1797         gfs2_glock_dq_uninit(&i_gh);
1798 out_q:
1799         gfs2_glock_dq_uninit(&q_gh);
1800 out_unlockput:
1801         gfs2_qa_put(ip);
1802         inode_unlock(&ip->i_inode);
1803 out_put:
1804         qd_put(qd);
1805         return error;
1806 }
1807
1808 const struct quotactl_ops gfs2_quotactl_ops = {
1809         .quota_sync     = gfs2_quota_sync,
1810         .get_state      = gfs2_quota_get_state,
1811         .get_dqblk      = gfs2_get_dqblk,
1812         .set_dqblk      = gfs2_set_dqblk,
1813 };
1814
1815 void __init gfs2_quota_hash_init(void)
1816 {
1817         unsigned i;
1818
1819         for(i = 0; i < GFS2_QD_HASH_SIZE; i++)
1820                 INIT_HLIST_BL_HEAD(&qd_hash_table[i]);
1821 }