1/*
   2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3 * All Rights Reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it would be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 * GNU General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write the Free Software Foundation,
  16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17 */
  18#include "xfs.h"
  19#include "xfs_fs.h"
  20#include "xfs_shared.h"
  21#include "xfs_format.h"
  22#include "xfs_log_format.h"
  23#include "xfs_trans_resv.h"
  24#include "xfs_bit.h"
  25#include "xfs_sb.h"
  26#include "xfs_mount.h"
  27#include "xfs_inode.h"
  28#include "xfs_ialloc.h"
  29#include "xfs_itable.h"
  30#include "xfs_quota.h"
  31#include "xfs_error.h"
  32#include "xfs_bmap.h"
  33#include "xfs_bmap_btree.h"
  34#include "xfs_trans.h"
  35#include "xfs_trans_space.h"
  36#include "xfs_qm.h"
  37#include "xfs_trace.h"
  38#include "xfs_icache.h"
  39#include "xfs_cksum.h"
 
 
  40
  41/*
  42 * The global quota manager. There is only one of these for the entire
  43 * system, _not_ one per file system. XQM keeps track of the overall
  44 * quota functionality, including maintaining the freelist and hash
  45 * tables of dquots.
  46 */
  47STATIC int	xfs_qm_init_quotainos(xfs_mount_t *);
  48STATIC int	xfs_qm_init_quotainfo(xfs_mount_t *);
  49
  50
 
  51STATIC void	xfs_qm_dqfree_one(struct xfs_dquot *dqp);
  52/*
  53 * We use the batch lookup interface to iterate over the dquots as it
  54 * currently is the only interface into the radix tree code that allows
  55 * fuzzy lookups instead of exact matches.  Holding the lock over multiple
  56 * operations is fine as all callers are used either during mount/umount
  57 * or quotaoff.
  58 */
  59#define XFS_DQ_LOOKUP_BATCH	32
  60
  61STATIC int
  62xfs_qm_dquot_walk(
  63	struct xfs_mount	*mp,
  64	int			type,
  65	int			(*execute)(struct xfs_dquot *dqp, void *data),
  66	void			*data)
  67{
  68	struct xfs_quotainfo	*qi = mp->m_quotainfo;
  69	struct radix_tree_root	*tree = xfs_dquot_tree(qi, type);
  70	uint32_t		next_index;
  71	int			last_error = 0;
  72	int			skipped;
  73	int			nr_found;
  74
  75restart:
  76	skipped = 0;
  77	next_index = 0;
  78	nr_found = 0;
  79
  80	while (1) {
  81		struct xfs_dquot *batch[XFS_DQ_LOOKUP_BATCH];
  82		int		error = 0;
  83		int		i;
  84
  85		mutex_lock(&qi->qi_tree_lock);
  86		nr_found = radix_tree_gang_lookup(tree, (void **)batch,
  87					next_index, XFS_DQ_LOOKUP_BATCH);
  88		if (!nr_found) {
  89			mutex_unlock(&qi->qi_tree_lock);
  90			break;
  91		}
  92
  93		for (i = 0; i < nr_found; i++) {
  94			struct xfs_dquot *dqp = batch[i];
  95
  96			next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
  97
  98			error = execute(batch[i], data);
  99			if (error == -EAGAIN) {
 100				skipped++;
 101				continue;
 102			}
 103			if (error && last_error != -EFSCORRUPTED)
 104				last_error = error;
 105		}
 106
 107		mutex_unlock(&qi->qi_tree_lock);
 108
 109		/* bail out if the filesystem is corrupted.  */
 110		if (last_error == -EFSCORRUPTED) {
 111			skipped = 0;
 112			break;
 113		}
 
 
 
 114	}
 115
 116	if (skipped) {
 117		delay(1);
 118		goto restart;
 119	}
 120
 121	return last_error;
 122}
 123
 124
 125/*
 126 * Purge a dquot from all tracking data structures and free it.
 127 */
 128STATIC int
 129xfs_qm_dqpurge(
 130	struct xfs_dquot	*dqp,
 131	void			*data)
 132{
 133	struct xfs_mount	*mp = dqp->q_mount;
 134	struct xfs_quotainfo	*qi = mp->m_quotainfo;
 
 135
 136	xfs_dqlock(dqp);
 137	if ((dqp->dq_flags & XFS_DQ_FREEING) || dqp->q_nrefs != 0) {
 138		xfs_dqunlock(dqp);
 139		return -EAGAIN;
 140	}
 141
 142	dqp->dq_flags |= XFS_DQ_FREEING;
 143
 144	xfs_dqflock(dqp);
 145
 146	/*
 147	 * If we are turning this type of quotas off, we don't care
 148	 * about the dirty metadata sitting in this dquot. OTOH, if
 149	 * we're unmounting, we do care, so we flush it and wait.
 150	 */
 151	if (XFS_DQ_IS_DIRTY(dqp)) {
 152		struct xfs_buf	*bp = NULL;
 153		int		error;
 154
 155		/*
 156		 * We don't care about getting disk errors here. We need
 157		 * to purge this dquot anyway, so we go ahead regardless.
 158		 */
 159		error = xfs_qm_dqflush(dqp, &bp);
 160		if (error) {
 161			xfs_warn(mp, "%s: dquot %p flush failed",
 162				__func__, dqp);
 163		} else {
 164			error = xfs_bwrite(bp);
 165			xfs_buf_relse(bp);
 
 
 
 166		}
 167		xfs_dqflock(dqp);
 168	}
 169
 170	ASSERT(atomic_read(&dqp->q_pincount) == 0);
 171	ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
 172	       !(dqp->q_logitem.qli_item.li_flags & XFS_LI_IN_AIL));
 173
 174	xfs_dqfunlock(dqp);
 175	xfs_dqunlock(dqp);
 176
 177	radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
 178			  be32_to_cpu(dqp->q_core.d_id));
 179	qi->qi_dquots--;
 180
 181	/*
 182	 * We move dquots to the freelist as soon as their reference count
 183	 * hits zero, so it really should be on the freelist here.
 184	 */
 185	ASSERT(!list_empty(&dqp->q_lru));
 186	list_lru_del(&qi->qi_lru, &dqp->q_lru);
 187	XFS_STATS_DEC(mp, xs_qm_dquot_unused);
 188
 189	xfs_qm_dqdestroy(dqp);
 190	return 0;
 
 
 
 
 191}
 192
 193/*
 194 * Purge the dquot cache.
 195 */
 196void
 197xfs_qm_dqpurge_all(
 198	struct xfs_mount	*mp,
 199	uint			flags)
 200{
 201	if (flags & XFS_QMOPT_UQUOTA)
 202		xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_dqpurge, NULL);
 203	if (flags & XFS_QMOPT_GQUOTA)
 204		xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_dqpurge, NULL);
 205	if (flags & XFS_QMOPT_PQUOTA)
 206		xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_dqpurge, NULL);
 207}
 208
 209/*
 210 * Just destroy the quotainfo structure.
 211 */
 212void
 213xfs_qm_unmount(
 214	struct xfs_mount	*mp)
 215{
 216	if (mp->m_quotainfo) {
 217		xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
 218		xfs_qm_destroy_quotainfo(mp);
 219	}
 220}
 221
 222/*
 223 * Called from the vfsops layer.
 224 */
 225void
 226xfs_qm_unmount_quotas(
 227	xfs_mount_t	*mp)
 228{
 229	/*
 230	 * Release the dquots that root inode, et al might be holding,
 231	 * before we flush quotas and blow away the quotainfo structure.
 232	 */
 233	ASSERT(mp->m_rootip);
 234	xfs_qm_dqdetach(mp->m_rootip);
 235	if (mp->m_rbmip)
 236		xfs_qm_dqdetach(mp->m_rbmip);
 237	if (mp->m_rsumip)
 238		xfs_qm_dqdetach(mp->m_rsumip);
 239
 240	/*
 241	 * Release the quota inodes.
 242	 */
 243	if (mp->m_quotainfo) {
 244		if (mp->m_quotainfo->qi_uquotaip) {
 245			IRELE(mp->m_quotainfo->qi_uquotaip);
 246			mp->m_quotainfo->qi_uquotaip = NULL;
 247		}
 248		if (mp->m_quotainfo->qi_gquotaip) {
 249			IRELE(mp->m_quotainfo->qi_gquotaip);
 250			mp->m_quotainfo->qi_gquotaip = NULL;
 251		}
 252		if (mp->m_quotainfo->qi_pquotaip) {
 253			IRELE(mp->m_quotainfo->qi_pquotaip);
 254			mp->m_quotainfo->qi_pquotaip = NULL;
 255		}
 256	}
 257}
 258
 259STATIC int
 260xfs_qm_dqattach_one(
 261	xfs_inode_t	*ip,
 262	xfs_dqid_t	id,
 263	uint		type,
 264	uint		doalloc,
 265	xfs_dquot_t	**IO_idqpp)
 266{
 267	xfs_dquot_t	*dqp;
 268	int		error;
 269
 270	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 271	error = 0;
 272
 273	/*
 274	 * See if we already have it in the inode itself. IO_idqpp is &i_udquot
 275	 * or &i_gdquot. This made the code look weird, but made the logic a lot
 276	 * simpler.
 277	 */
 278	dqp = *IO_idqpp;
 279	if (dqp) {
 280		trace_xfs_dqattach_found(dqp);
 281		return 0;
 282	}
 283
 284	/*
 285	 * Find the dquot from somewhere. This bumps the reference count of
 286	 * dquot and returns it locked.  This can return ENOENT if dquot didn't
 287	 * exist on disk and we didn't ask it to allocate; ESRCH if quotas got
 288	 * turned off suddenly.
 289	 */
 290	error = xfs_qm_dqget(ip->i_mount, ip, id, type,
 291			     doalloc | XFS_QMOPT_DOWARN, &dqp);
 292	if (error)
 293		return error;
 294
 295	trace_xfs_dqattach_get(dqp);
 296
 297	/*
 298	 * dqget may have dropped and re-acquired the ilock, but it guarantees
 299	 * that the dquot returned is the one that should go in the inode.
 300	 */
 301	*IO_idqpp = dqp;
 302	xfs_dqunlock(dqp);
 303	return 0;
 304}
 305
 306static bool
 307xfs_qm_need_dqattach(
 308	struct xfs_inode	*ip)
 309{
 310	struct xfs_mount	*mp = ip->i_mount;
 311
 312	if (!XFS_IS_QUOTA_RUNNING(mp))
 313		return false;
 314	if (!XFS_IS_QUOTA_ON(mp))
 315		return false;
 316	if (!XFS_NOT_DQATTACHED(mp, ip))
 317		return false;
 318	if (xfs_is_quota_inode(&mp->m_sb, ip->i_ino))
 319		return false;
 320	return true;
 321}
 322
 323/*
 324 * Given a locked inode, attach dquot(s) to it, taking U/G/P-QUOTAON
 325 * into account.
 326 * If XFS_QMOPT_DQALLOC, the dquot(s) will be allocated if needed.
 327 * Inode may get unlocked and relocked in here, and the caller must deal with
 328 * the consequences.
 329 */
 330int
 331xfs_qm_dqattach_locked(
 332	xfs_inode_t	*ip,
 333	uint		flags)
 334{
 335	xfs_mount_t	*mp = ip->i_mount;
 336	int		error = 0;
 337
 338	if (!xfs_qm_need_dqattach(ip))
 339		return 0;
 340
 341	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 342
 343	if (XFS_IS_UQUOTA_ON(mp) && !ip->i_udquot) {
 344		error = xfs_qm_dqattach_one(ip, ip->i_d.di_uid, XFS_DQ_USER,
 345						flags & XFS_QMOPT_DQALLOC,
 346						&ip->i_udquot);
 347		if (error)
 348			goto done;
 349		ASSERT(ip->i_udquot);
 350	}
 351
 352	if (XFS_IS_GQUOTA_ON(mp) && !ip->i_gdquot) {
 353		error = xfs_qm_dqattach_one(ip, ip->i_d.di_gid, XFS_DQ_GROUP,
 354						flags & XFS_QMOPT_DQALLOC,
 355						&ip->i_gdquot);
 356		if (error)
 357			goto done;
 358		ASSERT(ip->i_gdquot);
 359	}
 360
 361	if (XFS_IS_PQUOTA_ON(mp) && !ip->i_pdquot) {
 362		error = xfs_qm_dqattach_one(ip, xfs_get_projid(ip), XFS_DQ_PROJ,
 363						flags & XFS_QMOPT_DQALLOC,
 364						&ip->i_pdquot);
 365		if (error)
 366			goto done;
 367		ASSERT(ip->i_pdquot);
 368	}
 369
 370done:
 371	/*
 372	 * Don't worry about the dquots that we may have attached before any
 373	 * error - they'll get detached later if it has not already been done.
 374	 */
 375	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
 376	return error;
 377}
 378
 379int
 380xfs_qm_dqattach(
 381	struct xfs_inode	*ip,
 382	uint			flags)
 383{
 384	int			error;
 385
 386	if (!xfs_qm_need_dqattach(ip))
 387		return 0;
 388
 389	xfs_ilock(ip, XFS_ILOCK_EXCL);
 390	error = xfs_qm_dqattach_locked(ip, flags);
 391	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 392
 393	return error;
 394}
 395
 396/*
 397 * Release dquots (and their references) if any.
 398 * The inode should be locked EXCL except when this's called by
 399 * xfs_ireclaim.
 400 */
 401void
 402xfs_qm_dqdetach(
 403	xfs_inode_t	*ip)
 404{
 405	if (!(ip->i_udquot || ip->i_gdquot || ip->i_pdquot))
 406		return;
 407
 408	trace_xfs_dquot_dqdetach(ip);
 409
 410	ASSERT(!xfs_is_quota_inode(&ip->i_mount->m_sb, ip->i_ino));
 411	if (ip->i_udquot) {
 412		xfs_qm_dqrele(ip->i_udquot);
 413		ip->i_udquot = NULL;
 414	}
 415	if (ip->i_gdquot) {
 416		xfs_qm_dqrele(ip->i_gdquot);
 417		ip->i_gdquot = NULL;
 418	}
 419	if (ip->i_pdquot) {
 420		xfs_qm_dqrele(ip->i_pdquot);
 421		ip->i_pdquot = NULL;
 422	}
 423}
 424
 425struct xfs_qm_isolate {
 426	struct list_head	buffers;
 427	struct list_head	dispose;
 428};
 429
 430static enum lru_status
 431xfs_qm_dquot_isolate(
 432	struct list_head	*item,
 433	struct list_lru_one	*lru,
 434	spinlock_t		*lru_lock,
 435	void			*arg)
 436		__releases(lru_lock) __acquires(lru_lock)
 437{
 438	struct xfs_dquot	*dqp = container_of(item,
 439						struct xfs_dquot, q_lru);
 440	struct xfs_qm_isolate	*isol = arg;
 441
 442	if (!xfs_dqlock_nowait(dqp))
 443		goto out_miss_busy;
 444
 445	/*
 446	 * This dquot has acquired a reference in the meantime remove it from
 447	 * the freelist and try again.
 448	 */
 449	if (dqp->q_nrefs) {
 450		xfs_dqunlock(dqp);
 451		XFS_STATS_INC(dqp->q_mount, xs_qm_dqwants);
 452
 453		trace_xfs_dqreclaim_want(dqp);
 454		list_lru_isolate(lru, &dqp->q_lru);
 455		XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
 456		return LRU_REMOVED;
 457	}
 458
 459	/*
 460	 * If the dquot is dirty, flush it. If it's already being flushed, just
 461	 * skip it so there is time for the IO to complete before we try to
 462	 * reclaim it again on the next LRU pass.
 463	 */
 464	if (!xfs_dqflock_nowait(dqp)) {
 465		xfs_dqunlock(dqp);
 466		goto out_miss_busy;
 467	}
 468
 469	if (XFS_DQ_IS_DIRTY(dqp)) {
 470		struct xfs_buf	*bp = NULL;
 471		int		error;
 472
 473		trace_xfs_dqreclaim_dirty(dqp);
 474
 475		/* we have to drop the LRU lock to flush the dquot */
 476		spin_unlock(lru_lock);
 477
 478		error = xfs_qm_dqflush(dqp, &bp);
 479		if (error) {
 480			xfs_warn(dqp->q_mount, "%s: dquot %p flush failed",
 481				 __func__, dqp);
 482			goto out_unlock_dirty;
 483		}
 484
 485		xfs_buf_delwri_queue(bp, &isol->buffers);
 486		xfs_buf_relse(bp);
 487		goto out_unlock_dirty;
 488	}
 489	xfs_dqfunlock(dqp);
 490
 491	/*
 492	 * Prevent lookups now that we are past the point of no return.
 493	 */
 494	dqp->dq_flags |= XFS_DQ_FREEING;
 495	xfs_dqunlock(dqp);
 496
 497	ASSERT(dqp->q_nrefs == 0);
 498	list_lru_isolate_move(lru, &dqp->q_lru, &isol->dispose);
 499	XFS_STATS_DEC(dqp->q_mount, xs_qm_dquot_unused);
 500	trace_xfs_dqreclaim_done(dqp);
 501	XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaims);
 502	return LRU_REMOVED;
 503
 504out_miss_busy:
 505	trace_xfs_dqreclaim_busy(dqp);
 506	XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
 507	return LRU_SKIP;
 508
 509out_unlock_dirty:
 510	trace_xfs_dqreclaim_busy(dqp);
 511	XFS_STATS_INC(dqp->q_mount, xs_qm_dqreclaim_misses);
 512	xfs_dqunlock(dqp);
 513	spin_lock(lru_lock);
 514	return LRU_RETRY;
 515}
 516
 517static unsigned long
 518xfs_qm_shrink_scan(
 519	struct shrinker		*shrink,
 520	struct shrink_control	*sc)
 521{
 522	struct xfs_quotainfo	*qi = container_of(shrink,
 523					struct xfs_quotainfo, qi_shrinker);
 524	struct xfs_qm_isolate	isol;
 525	unsigned long		freed;
 526	int			error;
 527
 528	if ((sc->gfp_mask & (__GFP_FS|__GFP_DIRECT_RECLAIM)) != (__GFP_FS|__GFP_DIRECT_RECLAIM))
 529		return 0;
 530
 531	INIT_LIST_HEAD(&isol.buffers);
 532	INIT_LIST_HEAD(&isol.dispose);
 533
 534	freed = list_lru_shrink_walk(&qi->qi_lru, sc,
 535				     xfs_qm_dquot_isolate, &isol);
 536
 537	error = xfs_buf_delwri_submit(&isol.buffers);
 538	if (error)
 539		xfs_warn(NULL, "%s: dquot reclaim failed", __func__);
 540
 541	while (!list_empty(&isol.dispose)) {
 542		struct xfs_dquot	*dqp;
 543
 544		dqp = list_first_entry(&isol.dispose, struct xfs_dquot, q_lru);
 545		list_del_init(&dqp->q_lru);
 546		xfs_qm_dqfree_one(dqp);
 547	}
 548
 549	return freed;
 550}
 551
 552static unsigned long
 553xfs_qm_shrink_count(
 554	struct shrinker		*shrink,
 555	struct shrink_control	*sc)
 556{
 557	struct xfs_quotainfo	*qi = container_of(shrink,
 558					struct xfs_quotainfo, qi_shrinker);
 559
 560	return list_lru_shrink_count(&qi->qi_lru, sc);
 561}
 562
 563STATIC void
 564xfs_qm_set_defquota(
 565	xfs_mount_t	*mp,
 566	uint		type,
 567	xfs_quotainfo_t	*qinf)
 568{
 569	xfs_dquot_t		*dqp;
 570	struct xfs_def_quota    *defq;
 571	int			error;
 572
 573	error = xfs_qm_dqread(mp, 0, type, XFS_QMOPT_DOWARN, &dqp);
 
 
 574
 575	if (!error) {
 576		xfs_disk_dquot_t        *ddqp = &dqp->q_core;
 577
 578		defq = xfs_get_defquota(dqp, qinf);
 
 
 
 
 
 
 
 
 
 
 
 579
 580		/*
 581		 * Timers and warnings have been already set, let's just set the
 582		 * default limits for this quota type
 583		 */
 584		defq->bhardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
 585		defq->bsoftlimit = be64_to_cpu(ddqp->d_blk_softlimit);
 586		defq->ihardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
 587		defq->isoftlimit = be64_to_cpu(ddqp->d_ino_softlimit);
 588		defq->rtbhardlimit = be64_to_cpu(ddqp->d_rtb_hardlimit);
 589		defq->rtbsoftlimit = be64_to_cpu(ddqp->d_rtb_softlimit);
 590		xfs_qm_dqdestroy(dqp);
 591	}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 592}
 593
 594/*
 595 * This initializes all the quota information that's kept in the
 596 * mount structure
 597 */
 598STATIC int
 599xfs_qm_init_quotainfo(
 600	xfs_mount_t	*mp)
 601{
 602	xfs_quotainfo_t *qinf;
 603	int		error;
 604	xfs_dquot_t	*dqp;
 605
 606	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
 607
 608	qinf = mp->m_quotainfo = kmem_zalloc(sizeof(xfs_quotainfo_t), KM_SLEEP);
 609
 610	error = list_lru_init(&qinf->qi_lru);
 611	if (error)
 612		goto out_free_qinf;
 613
 614	/*
 615	 * See if quotainodes are setup, and if not, allocate them,
 616	 * and change the superblock accordingly.
 617	 */
 618	error = xfs_qm_init_quotainos(mp);
 619	if (error)
 620		goto out_free_lru;
 621
 622	INIT_RADIX_TREE(&qinf->qi_uquota_tree, GFP_NOFS);
 623	INIT_RADIX_TREE(&qinf->qi_gquota_tree, GFP_NOFS);
 624	INIT_RADIX_TREE(&qinf->qi_pquota_tree, GFP_NOFS);
 625	mutex_init(&qinf->qi_tree_lock);
 626
 627	/* mutex used to serialize quotaoffs */
 628	mutex_init(&qinf->qi_quotaofflock);
 629
 630	/* Precalc some constants */
 631	qinf->qi_dqchunklen = XFS_FSB_TO_BB(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
 632	qinf->qi_dqperchunk = xfs_calc_dquots_per_chunk(qinf->qi_dqchunklen);
 
 
 
 
 
 
 
 
 
 
 
 633
 634	mp->m_qflags |= (mp->m_sb.sb_qflags & XFS_ALL_QUOTA_CHKD);
 635
 636	/*
 637	 * We try to get the limits from the superuser's limits fields.
 638	 * This is quite hacky, but it is standard quota practice.
 639	 *
 640	 * Since we may not have done a quotacheck by this point, just read
 641	 * the dquot without attaching it to any hashtables or lists.
 642	 *
 643	 * Timers and warnings are globally set by the first timer found in
 644	 * user/group/proj quota types, otherwise a default value is used.
 645	 * This should be split into different fields per quota type.
 646	 */
 647	error = xfs_qm_dqread(mp, 0,
 648			XFS_IS_UQUOTA_RUNNING(mp) ? XFS_DQ_USER :
 649			 (XFS_IS_GQUOTA_RUNNING(mp) ? XFS_DQ_GROUP :
 650			  XFS_DQ_PROJ),
 651			XFS_QMOPT_DOWARN, &dqp);
 652
 653	if (!error) {
 654		xfs_disk_dquot_t	*ddqp = &dqp->q_core;
 655
 656		/*
 657		 * The warnings and timers set the grace period given to
 658		 * a user or group before he or she can not perform any
 659		 * more writing. If it is zero, a default is used.
 660		 */
 661		qinf->qi_btimelimit = ddqp->d_btimer ?
 662			be32_to_cpu(ddqp->d_btimer) : XFS_QM_BTIMELIMIT;
 663		qinf->qi_itimelimit = ddqp->d_itimer ?
 664			be32_to_cpu(ddqp->d_itimer) : XFS_QM_ITIMELIMIT;
 665		qinf->qi_rtbtimelimit = ddqp->d_rtbtimer ?
 666			be32_to_cpu(ddqp->d_rtbtimer) : XFS_QM_RTBTIMELIMIT;
 667		qinf->qi_bwarnlimit = ddqp->d_bwarns ?
 668			be16_to_cpu(ddqp->d_bwarns) : XFS_QM_BWARNLIMIT;
 669		qinf->qi_iwarnlimit = ddqp->d_iwarns ?
 670			be16_to_cpu(ddqp->d_iwarns) : XFS_QM_IWARNLIMIT;
 671		qinf->qi_rtbwarnlimit = ddqp->d_rtbwarns ?
 672			be16_to_cpu(ddqp->d_rtbwarns) : XFS_QM_RTBWARNLIMIT;
 673		xfs_qm_dqdestroy(dqp);
 674	} else {
 675		qinf->qi_btimelimit = XFS_QM_BTIMELIMIT;
 676		qinf->qi_itimelimit = XFS_QM_ITIMELIMIT;
 677		qinf->qi_rtbtimelimit = XFS_QM_RTBTIMELIMIT;
 678		qinf->qi_bwarnlimit = XFS_QM_BWARNLIMIT;
 679		qinf->qi_iwarnlimit = XFS_QM_IWARNLIMIT;
 680		qinf->qi_rtbwarnlimit = XFS_QM_RTBWARNLIMIT;
 681	}
 682
 683	if (XFS_IS_UQUOTA_RUNNING(mp))
 684		xfs_qm_set_defquota(mp, XFS_DQ_USER, qinf);
 685	if (XFS_IS_GQUOTA_RUNNING(mp))
 686		xfs_qm_set_defquota(mp, XFS_DQ_GROUP, qinf);
 687	if (XFS_IS_PQUOTA_RUNNING(mp))
 688		xfs_qm_set_defquota(mp, XFS_DQ_PROJ, qinf);
 689
 690	qinf->qi_shrinker.count_objects = xfs_qm_shrink_count;
 691	qinf->qi_shrinker.scan_objects = xfs_qm_shrink_scan;
 692	qinf->qi_shrinker.seeks = DEFAULT_SEEKS;
 693	qinf->qi_shrinker.flags = SHRINKER_NUMA_AWARE;
 694	register_shrinker(&qinf->qi_shrinker);
 
 
 
 
 695	return 0;
 696
 
 
 
 
 697out_free_lru:
 698	list_lru_destroy(&qinf->qi_lru);
 699out_free_qinf:
 700	kmem_free(qinf);
 701	mp->m_quotainfo = NULL;
 702	return error;
 703}
 704
 705
 706/*
 707 * Gets called when unmounting a filesystem or when all quotas get
 708 * turned off.
 709 * This purges the quota inodes, destroys locks and frees itself.
 710 */
 711void
 712xfs_qm_destroy_quotainfo(
 713	xfs_mount_t	*mp)
 714{
 715	xfs_quotainfo_t *qi;
 716
 717	qi = mp->m_quotainfo;
 718	ASSERT(qi != NULL);
 719
 720	unregister_shrinker(&qi->qi_shrinker);
 721	list_lru_destroy(&qi->qi_lru);
 722
 723	if (qi->qi_uquotaip) {
 724		IRELE(qi->qi_uquotaip);
 725		qi->qi_uquotaip = NULL; /* paranoia */
 726	}
 727	if (qi->qi_gquotaip) {
 728		IRELE(qi->qi_gquotaip);
 729		qi->qi_gquotaip = NULL;
 730	}
 731	if (qi->qi_pquotaip) {
 732		IRELE(qi->qi_pquotaip);
 733		qi->qi_pquotaip = NULL;
 734	}
 735	mutex_destroy(&qi->qi_quotaofflock);
 736	kmem_free(qi);
 737	mp->m_quotainfo = NULL;
 738}
 739
 740/*
 741 * Create an inode and return with a reference already taken, but unlocked
 742 * This is how we create quota inodes
 743 */
 744STATIC int
 745xfs_qm_qino_alloc(
 746	xfs_mount_t	*mp,
 747	xfs_inode_t	**ip,
 748	uint		flags)
 749{
 750	xfs_trans_t	*tp;
 751	int		error;
 752	int		committed;
 753	bool		need_alloc = true;
 754
 755	*ip = NULL;
 756	/*
 757	 * With superblock that doesn't have separate pquotino, we
 758	 * share an inode between gquota and pquota. If the on-disk
 759	 * superblock has GQUOTA and the filesystem is now mounted
 760	 * with PQUOTA, just use sb_gquotino for sb_pquotino and
 761	 * vice-versa.
 762	 */
 763	if (!xfs_sb_version_has_pquotino(&mp->m_sb) &&
 764			(flags & (XFS_QMOPT_PQUOTA|XFS_QMOPT_GQUOTA))) {
 765		xfs_ino_t ino = NULLFSINO;
 766
 767		if ((flags & XFS_QMOPT_PQUOTA) &&
 768			     (mp->m_sb.sb_gquotino != NULLFSINO)) {
 769			ino = mp->m_sb.sb_gquotino;
 770			ASSERT(mp->m_sb.sb_pquotino == NULLFSINO);
 
 
 771		} else if ((flags & XFS_QMOPT_GQUOTA) &&
 772			     (mp->m_sb.sb_pquotino != NULLFSINO)) {
 773			ino = mp->m_sb.sb_pquotino;
 774			ASSERT(mp->m_sb.sb_gquotino == NULLFSINO);
 
 
 775		}
 776		if (ino != NULLFSINO) {
 777			error = xfs_iget(mp, NULL, ino, 0, 0, ip);
 778			if (error)
 779				return error;
 780			mp->m_sb.sb_gquotino = NULLFSINO;
 781			mp->m_sb.sb_pquotino = NULLFSINO;
 782			need_alloc = false;
 783		}
 784	}
 785
 786	tp = xfs_trans_alloc(mp, XFS_TRANS_QM_QINOCREATE);
 787	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_create,
 788				  XFS_QM_QINOCREATE_SPACE_RES(mp), 0);
 789	if (error) {
 790		xfs_trans_cancel(tp);
 791		return error;
 792	}
 793
 794	if (need_alloc) {
 795		error = xfs_dir_ialloc(&tp, NULL, S_IFREG, 1, 0, 0, 1, ip,
 796								&committed);
 
 
 
 
 797		if (error) {
 798			xfs_trans_cancel(tp);
 799			return error;
 800		}
 801	}
 802
 803	/*
 804	 * Make the changes in the superblock, and log those too.
 805	 * sbfields arg may contain fields other than *QUOTINO;
 806	 * VERSIONNUM for example.
 807	 */
 808	spin_lock(&mp->m_sb_lock);
 809	if (flags & XFS_QMOPT_SBVERSION) {
 810		ASSERT(!xfs_sb_version_hasquota(&mp->m_sb));
 811
 812		xfs_sb_version_addquota(&mp->m_sb);
 813		mp->m_sb.sb_uquotino = NULLFSINO;
 814		mp->m_sb.sb_gquotino = NULLFSINO;
 815		mp->m_sb.sb_pquotino = NULLFSINO;
 816
 817		/* qflags will get updated fully _after_ quotacheck */
 818		mp->m_sb.sb_qflags = mp->m_qflags & XFS_ALL_QUOTA_ACCT;
 819	}
 820	if (flags & XFS_QMOPT_UQUOTA)
 821		mp->m_sb.sb_uquotino = (*ip)->i_ino;
 822	else if (flags & XFS_QMOPT_GQUOTA)
 823		mp->m_sb.sb_gquotino = (*ip)->i_ino;
 824	else
 825		mp->m_sb.sb_pquotino = (*ip)->i_ino;
 826	spin_unlock(&mp->m_sb_lock);
 827	xfs_log_sb(tp);
 828
 829	error = xfs_trans_commit(tp);
 830	if (error) {
 831		ASSERT(XFS_FORCED_SHUTDOWN(mp));
 832		xfs_alert(mp, "%s failed (error %d)!", __func__, error);
 833	}
 834	if (need_alloc)
 835		xfs_finish_inode_setup(*ip);
 836	return error;
 837}
 838
 839
 840STATIC void
 841xfs_qm_reset_dqcounts(
 842	xfs_mount_t	*mp,
 843	xfs_buf_t	*bp,
 844	xfs_dqid_t	id,
 845	uint		type)
 846{
 847	struct xfs_dqblk	*dqb;
 848	int			j;
 849
 850	trace_xfs_reset_dqcounts(bp, _RET_IP_);
 851
 852	/*
 853	 * Reset all counters and timers. They'll be
 854	 * started afresh by xfs_qm_quotacheck.
 855	 */
 856#ifdef DEBUG
 857	j = XFS_FSB_TO_B(mp, XFS_DQUOT_CLUSTER_SIZE_FSB);
 858	do_div(j, sizeof(xfs_dqblk_t));
 859	ASSERT(mp->m_quotainfo->qi_dqperchunk == j);
 860#endif
 861	dqb = bp->b_addr;
 862	for (j = 0; j < mp->m_quotainfo->qi_dqperchunk; j++) {
 863		struct xfs_disk_dquot	*ddq;
 864
 865		ddq = (struct xfs_disk_dquot *)&dqb[j];
 866
 867		/*
 868		 * Do a sanity check, and if needed, repair the dqblk. Don't
 869		 * output any warnings because it's perfectly possible to
 870		 * find uninitialised dquot blks. See comment in xfs_dqcheck.
 
 871		 */
 872		xfs_dqcheck(mp, ddq, id+j, type, XFS_QMOPT_DQREPAIR,
 873			    "xfs_quotacheck");
 
 
 874		/*
 875		 * Reset type in case we are reusing group quota file for
 876		 * project quotas or vice versa
 877		 */
 878		ddq->d_flags = type;
 879		ddq->d_bcount = 0;
 880		ddq->d_icount = 0;
 881		ddq->d_rtbcount = 0;
 882		ddq->d_btimer = 0;
 883		ddq->d_itimer = 0;
 884		ddq->d_rtbtimer = 0;
 885		ddq->d_bwarns = 0;
 886		ddq->d_iwarns = 0;
 887		ddq->d_rtbwarns = 0;
 
 
 
 
 
 
 
 
 
 
 888
 889		if (xfs_sb_version_hascrc(&mp->m_sb)) {
 890			xfs_update_cksum((char *)&dqb[j],
 891					 sizeof(struct xfs_dqblk),
 892					 XFS_DQUOT_CRC_OFF);
 893		}
 894	}
 895}
 896
 897STATIC int
 898xfs_qm_dqiter_bufs(
 899	struct xfs_mount	*mp,
 900	xfs_dqid_t		firstid,
 901	xfs_fsblock_t		bno,
 902	xfs_filblks_t		blkcnt,
 903	uint			flags,
 904	struct list_head	*buffer_list)
 905{
 906	struct xfs_buf		*bp;
 907	int			error;
 908	int			type;
 909
 910	ASSERT(blkcnt > 0);
 911	type = flags & XFS_QMOPT_UQUOTA ? XFS_DQ_USER :
 912		(flags & XFS_QMOPT_PQUOTA ? XFS_DQ_PROJ : XFS_DQ_GROUP);
 913	error = 0;
 914
 915	/*
 916	 * Blkcnt arg can be a very big number, and might even be
 917	 * larger than the log itself. So, we have to break it up into
 918	 * manageable-sized transactions.
 919	 * Note that we don't start a permanent transaction here; we might
 920	 * not be able to get a log reservation for the whole thing up front,
 921	 * and we don't really care to either, because we just discard
 922	 * everything if we were to crash in the middle of this loop.
 923	 */
 924	while (blkcnt--) {
 925		error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
 926			      XFS_FSB_TO_DADDR(mp, bno),
 927			      mp->m_quotainfo->qi_dqchunklen, 0, &bp,
 928			      &xfs_dquot_buf_ops);
 929
 930		/*
 931		 * CRC and validation errors will return a EFSCORRUPTED here. If
 932		 * this occurs, re-read without CRC validation so that we can
 933		 * repair the damage via xfs_qm_reset_dqcounts(). This process
 934		 * will leave a trace in the log indicating corruption has
 935		 * been detected.
 936		 */
 937		if (error == -EFSCORRUPTED) {
 938			error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
 939				      XFS_FSB_TO_DADDR(mp, bno),
 940				      mp->m_quotainfo->qi_dqchunklen, 0, &bp,
 941				      NULL);
 942		}
 943
 944		if (error)
 945			break;
 946
 947		/*
 948		 * A corrupt buffer might not have a verifier attached, so
 949		 * make sure we have the correct one attached before writeback
 950		 * occurs.
 951		 */
 952		bp->b_ops = &xfs_dquot_buf_ops;
 953		xfs_qm_reset_dqcounts(mp, bp, firstid, type);
 954		xfs_buf_delwri_queue(bp, buffer_list);
 955		xfs_buf_relse(bp);
 956
 957		/* goto the next block. */
 958		bno++;
 959		firstid += mp->m_quotainfo->qi_dqperchunk;
 960	}
 961
 962	return error;
 963}
 964
 965/*
 966 * Iterate over all allocated USR/GRP/PRJ dquots in the system, calling a
 967 * caller supplied function for every chunk of dquots that we find.
 968 */
 969STATIC int
 970xfs_qm_dqiterate(
 971	struct xfs_mount	*mp,
 972	struct xfs_inode	*qip,
 973	uint			flags,
 974	struct list_head	*buffer_list)
 975{
 976	struct xfs_bmbt_irec	*map;
 977	int			i, nmaps;	/* number of map entries */
 978	int			error;		/* return value */
 979	xfs_fileoff_t		lblkno;
 980	xfs_filblks_t		maxlblkcnt;
 981	xfs_dqid_t		firstid;
 982	xfs_fsblock_t		rablkno;
 983	xfs_filblks_t		rablkcnt;
 984
 985	error = 0;
 986	/*
 987	 * This looks racy, but we can't keep an inode lock across a
 988	 * trans_reserve. But, this gets called during quotacheck, and that
 989	 * happens only at mount time which is single threaded.
 990	 */
 991	if (qip->i_d.di_nblocks == 0)
 992		return 0;
 993
 994	map = kmem_alloc(XFS_DQITER_MAP_SIZE * sizeof(*map), KM_SLEEP);
 995
 996	lblkno = 0;
 997	maxlblkcnt = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
 998	do {
 999		uint		lock_mode;
1000
1001		nmaps = XFS_DQITER_MAP_SIZE;
1002		/*
1003		 * We aren't changing the inode itself. Just changing
1004		 * some of its data. No new blocks are added here, and
1005		 * the inode is never added to the transaction.
1006		 */
1007		lock_mode = xfs_ilock_data_map_shared(qip);
1008		error = xfs_bmapi_read(qip, lblkno, maxlblkcnt - lblkno,
1009				       map, &nmaps, 0);
1010		xfs_iunlock(qip, lock_mode);
1011		if (error)
1012			break;
1013
1014		ASSERT(nmaps <= XFS_DQITER_MAP_SIZE);
1015		for (i = 0; i < nmaps; i++) {
1016			ASSERT(map[i].br_startblock != DELAYSTARTBLOCK);
1017			ASSERT(map[i].br_blockcount);
1018
1019
1020			lblkno += map[i].br_blockcount;
1021
1022			if (map[i].br_startblock == HOLESTARTBLOCK)
1023				continue;
1024
1025			firstid = (xfs_dqid_t) map[i].br_startoff *
1026				mp->m_quotainfo->qi_dqperchunk;
1027			/*
1028			 * Do a read-ahead on the next extent.
1029			 */
1030			if ((i+1 < nmaps) &&
1031			    (map[i+1].br_startblock != HOLESTARTBLOCK)) {
1032				rablkcnt =  map[i+1].br_blockcount;
1033				rablkno = map[i+1].br_startblock;
1034				while (rablkcnt--) {
1035					xfs_buf_readahead(mp->m_ddev_targp,
1036					       XFS_FSB_TO_DADDR(mp, rablkno),
1037					       mp->m_quotainfo->qi_dqchunklen,
1038					       &xfs_dquot_buf_ops);
1039					rablkno++;
1040				}
1041			}
1042			/*
1043			 * Iterate thru all the blks in the extent and
1044			 * reset the counters of all the dquots inside them.
1045			 */
1046			error = xfs_qm_dqiter_bufs(mp, firstid,
1047						   map[i].br_startblock,
1048						   map[i].br_blockcount,
1049						   flags, buffer_list);
1050			if (error)
1051				goto out;
1052		}
1053	} while (nmaps > 0);
1054
1055out:
1056	kmem_free(map);
1057	return error;
1058}
1059
1060/*
1061 * Called by dqusage_adjust in doing a quotacheck.
1062 *
1063 * Given the inode, and a dquot id this updates both the incore dqout as well
1064 * as the buffer copy. This is so that once the quotacheck is done, we can
1065 * just log all the buffers, as opposed to logging numerous updates to
1066 * individual dquots.
1067 */
1068STATIC int
1069xfs_qm_quotacheck_dqadjust(
1070	struct xfs_inode	*ip,
1071	xfs_dqid_t		id,
1072	uint			type,
1073	xfs_qcnt_t		nblks,
1074	xfs_qcnt_t		rtblks)
1075{
1076	struct xfs_mount	*mp = ip->i_mount;
1077	struct xfs_dquot	*dqp;
 
1078	int			error;
1079
1080	error = xfs_qm_dqget(mp, ip, id, type,
1081			     XFS_QMOPT_DQALLOC | XFS_QMOPT_DOWARN, &dqp);
1082	if (error) {
1083		/*
1084		 * Shouldn't be able to turn off quotas here.
1085		 */
1086		ASSERT(error != -ESRCH);
1087		ASSERT(error != -ENOENT);
1088		return error;
1089	}
1090
1091	trace_xfs_dqadjust(dqp);
1092
1093	/*
1094	 * Adjust the inode count and the block count to reflect this inode's
1095	 * resource usage.
1096	 */
1097	be64_add_cpu(&dqp->q_core.d_icount, 1);
1098	dqp->q_res_icount++;
1099	if (nblks) {
1100		be64_add_cpu(&dqp->q_core.d_bcount, nblks);
1101		dqp->q_res_bcount += nblks;
1102	}
1103	if (rtblks) {
1104		be64_add_cpu(&dqp->q_core.d_rtbcount, rtblks);
1105		dqp->q_res_rtbcount += rtblks;
1106	}
1107
1108	/*
1109	 * Set default limits, adjust timers (since we changed usages)
1110	 *
1111	 * There are no timers for the default values set in the root dquot.
1112	 */
1113	if (dqp->q_core.d_id) {
1114		xfs_qm_adjust_dqlimits(mp, dqp);
1115		xfs_qm_adjust_dqtimers(mp, &dqp->q_core);
1116	}
1117
1118	dqp->dq_flags |= XFS_DQ_DIRTY;
1119	xfs_qm_dqput(dqp);
1120	return 0;
1121}
1122
1123STATIC int
1124xfs_qm_get_rtblks(
1125	xfs_inode_t	*ip,
1126	xfs_qcnt_t	*O_rtblks)
1127{
1128	xfs_filblks_t	rtblks;			/* total rt blks */
1129	xfs_extnum_t	idx;			/* extent record index */
1130	xfs_ifork_t	*ifp;			/* inode fork pointer */
1131	xfs_extnum_t	nextents;		/* number of extent entries */
1132	int		error;
1133
1134	ASSERT(XFS_IS_REALTIME_INODE(ip));
1135	ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
1136	if (!(ifp->if_flags & XFS_IFEXTENTS)) {
1137		if ((error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK)))
1138			return error;
1139	}
1140	rtblks = 0;
1141	nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
1142	for (idx = 0; idx < nextents; idx++)
1143		rtblks += xfs_bmbt_get_blockcount(xfs_iext_get_ext(ifp, idx));
1144	*O_rtblks = (xfs_qcnt_t)rtblks;
1145	return 0;
1146}
1147
1148/*
1149 * callback routine supplied to bulkstat(). Given an inumber, find its
1150 * dquots and update them to account for resources taken by that inode.
1151 */
1152/* ARGSUSED */
1153STATIC int
1154xfs_qm_dqusage_adjust(
1155	xfs_mount_t	*mp,		/* mount point for filesystem */
1156	xfs_ino_t	ino,		/* inode number to get data for */
1157	void		__user *buffer,	/* not used */
1158	int		ubsize,		/* not used */
1159	int		*ubused,	/* not used */
1160	int		*res)		/* result code value */
1161{
1162	xfs_inode_t	*ip;
1163	xfs_qcnt_t	nblks, rtblks = 0;
1164	int		error;
1165
1166	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1167
1168	/*
1169	 * rootino must have its resources accounted for, not so with the quota
1170	 * inodes.
1171	 */
1172	if (xfs_is_quota_inode(&mp->m_sb, ino)) {
1173		*res = BULKSTAT_RV_NOTHING;
1174		return -EINVAL;
1175	}
1176
1177	/*
1178	 * We don't _need_ to take the ilock EXCL. However, the xfs_qm_dqget
1179	 * interface expects the inode to be exclusively locked because that's
1180	 * the case in all other instances. It's OK that we do this because
1181	 * quotacheck is done only at mount time.
1182	 */
1183	error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_EXCL, &ip);
1184	if (error) {
1185		*res = BULKSTAT_RV_NOTHING;
 
1186		return error;
1187	}
1188
1189	ASSERT(ip->i_delayed_blks == 0);
1190
1191	if (XFS_IS_REALTIME_INODE(ip)) {
1192		/*
1193		 * Walk thru the extent list and count the realtime blocks.
1194		 */
1195		error = xfs_qm_get_rtblks(ip, &rtblks);
1196		if (error)
1197			goto error0;
 
 
1198	}
1199
1200	nblks = (xfs_qcnt_t)ip->i_d.di_nblocks - rtblks;
1201
1202	/*
1203	 * Add the (disk blocks and inode) resources occupied by this
1204	 * inode to its dquots. We do this adjustment in the incore dquot,
1205	 * and also copy the changes to its buffer.
1206	 * We don't care about putting these changes in a transaction
1207	 * envelope because if we crash in the middle of a 'quotacheck'
1208	 * we have to start from the beginning anyway.
1209	 * Once we're done, we'll log all the dquot bufs.
1210	 *
1211	 * The *QUOTA_ON checks below may look pretty racy, but quotachecks
1212	 * and quotaoffs don't race. (Quotachecks happen at mount time only).
1213	 */
1214	if (XFS_IS_UQUOTA_ON(mp)) {
1215		error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_uid,
1216						   XFS_DQ_USER, nblks, rtblks);
1217		if (error)
1218			goto error0;
1219	}
1220
1221	if (XFS_IS_GQUOTA_ON(mp)) {
1222		error = xfs_qm_quotacheck_dqadjust(ip, ip->i_d.di_gid,
1223						   XFS_DQ_GROUP, nblks, rtblks);
1224		if (error)
1225			goto error0;
1226	}
1227
1228	if (XFS_IS_PQUOTA_ON(mp)) {
1229		error = xfs_qm_quotacheck_dqadjust(ip, xfs_get_projid(ip),
1230						   XFS_DQ_PROJ, nblks, rtblks);
1231		if (error)
1232			goto error0;
1233	}
1234
1235	xfs_iunlock(ip, XFS_ILOCK_EXCL);
1236	IRELE(ip);
1237	*res = BULKSTAT_RV_DIDONE;
1238	return 0;
1239
1240error0:
1241	xfs_iunlock(ip, XFS_ILOCK_EXCL);
1242	IRELE(ip);
1243	*res = BULKSTAT_RV_GIVEUP;
1244	return error;
1245}
1246
1247STATIC int
1248xfs_qm_flush_one(
1249	struct xfs_dquot	*dqp,
1250	void			*data)
1251{
 
1252	struct list_head	*buffer_list = data;
1253	struct xfs_buf		*bp = NULL;
1254	int			error = 0;
1255
1256	xfs_dqlock(dqp);
1257	if (dqp->dq_flags & XFS_DQ_FREEING)
1258		goto out_unlock;
1259	if (!XFS_DQ_IS_DIRTY(dqp))
1260		goto out_unlock;
1261
1262	xfs_dqflock(dqp);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1263	error = xfs_qm_dqflush(dqp, &bp);
1264	if (error)
1265		goto out_unlock;
1266
1267	xfs_buf_delwri_queue(bp, buffer_list);
1268	xfs_buf_relse(bp);
1269out_unlock:
1270	xfs_dqunlock(dqp);
1271	return error;
1272}
1273
1274/*
1275 * Walk thru all the filesystem inodes and construct a consistent view
1276 * of the disk quota world. If the quotacheck fails, disable quotas.
1277 */
1278STATIC int
1279xfs_qm_quotacheck(
1280	xfs_mount_t	*mp)
1281{
1282	int			done, count, error, error2;
1283	xfs_ino_t		lastino;
1284	size_t			structsz;
1285	uint			flags;
1286	LIST_HEAD		(buffer_list);
1287	struct xfs_inode	*uip = mp->m_quotainfo->qi_uquotaip;
1288	struct xfs_inode	*gip = mp->m_quotainfo->qi_gquotaip;
1289	struct xfs_inode	*pip = mp->m_quotainfo->qi_pquotaip;
1290
1291	count = INT_MAX;
1292	structsz = 1;
1293	lastino = 0;
1294	flags = 0;
1295
1296	ASSERT(uip || gip || pip);
1297	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1298
1299	xfs_notice(mp, "Quotacheck needed: Please wait.");
1300
1301	/*
1302	 * First we go thru all the dquots on disk, USR and GRP/PRJ, and reset
1303	 * their counters to zero. We need a clean slate.
1304	 * We don't log our changes till later.
1305	 */
1306	if (uip) {
1307		error = xfs_qm_dqiterate(mp, uip, XFS_QMOPT_UQUOTA,
1308					 &buffer_list);
1309		if (error)
1310			goto error_return;
1311		flags |= XFS_UQUOTA_CHKD;
1312	}
1313
1314	if (gip) {
1315		error = xfs_qm_dqiterate(mp, gip, XFS_QMOPT_GQUOTA,
1316					 &buffer_list);
1317		if (error)
1318			goto error_return;
1319		flags |= XFS_GQUOTA_CHKD;
1320	}
1321
1322	if (pip) {
1323		error = xfs_qm_dqiterate(mp, pip, XFS_QMOPT_PQUOTA,
1324					 &buffer_list);
1325		if (error)
1326			goto error_return;
1327		flags |= XFS_PQUOTA_CHKD;
1328	}
1329
1330	do {
1331		/*
1332		 * Iterate thru all the inodes in the file system,
1333		 * adjusting the corresponding dquot counters in core.
1334		 */
1335		error = xfs_bulkstat(mp, &lastino, &count,
1336				     xfs_qm_dqusage_adjust,
1337				     structsz, NULL, &done);
1338		if (error)
1339			break;
1340
1341	} while (!done);
1342
1343	/*
1344	 * We've made all the changes that we need to make incore.  Flush them
1345	 * down to disk buffers if everything was updated successfully.
1346	 */
1347	if (XFS_IS_UQUOTA_ON(mp)) {
1348		error = xfs_qm_dquot_walk(mp, XFS_DQ_USER, xfs_qm_flush_one,
1349					  &buffer_list);
1350	}
1351	if (XFS_IS_GQUOTA_ON(mp)) {
1352		error2 = xfs_qm_dquot_walk(mp, XFS_DQ_GROUP, xfs_qm_flush_one,
1353					   &buffer_list);
1354		if (!error)
1355			error = error2;
1356	}
1357	if (XFS_IS_PQUOTA_ON(mp)) {
1358		error2 = xfs_qm_dquot_walk(mp, XFS_DQ_PROJ, xfs_qm_flush_one,
1359					   &buffer_list);
1360		if (!error)
1361			error = error2;
1362	}
1363
1364	error2 = xfs_buf_delwri_submit(&buffer_list);
1365	if (!error)
1366		error = error2;
1367
1368	/*
1369	 * We can get this error if we couldn't do a dquot allocation inside
1370	 * xfs_qm_dqusage_adjust (via bulkstat). We don't care about the
1371	 * dirty dquots that might be cached, we just want to get rid of them
1372	 * and turn quotaoff. The dquots won't be attached to any of the inodes
1373	 * at this point (because we intentionally didn't in dqget_noattach).
1374	 */
1375	if (error) {
1376		xfs_qm_dqpurge_all(mp, XFS_QMOPT_QUOTALL);
1377		goto error_return;
1378	}
1379
1380	/*
1381	 * If one type of quotas is off, then it will lose its
1382	 * quotachecked status, since we won't be doing accounting for
1383	 * that type anymore.
1384	 */
1385	mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
1386	mp->m_qflags |= flags;
1387
1388 error_return:
1389	while (!list_empty(&buffer_list)) {
1390		struct xfs_buf *bp =
1391			list_first_entry(&buffer_list, struct xfs_buf, b_list);
1392		list_del_init(&bp->b_list);
1393		xfs_buf_relse(bp);
1394	}
1395
1396	if (error) {
1397		xfs_warn(mp,
1398	"Quotacheck: Unsuccessful (Error %d): Disabling quotas.",
1399			error);
1400		/*
1401		 * We must turn off quotas.
1402		 */
1403		ASSERT(mp->m_quotainfo != NULL);
1404		xfs_qm_destroy_quotainfo(mp);
1405		if (xfs_mount_reset_sbqflags(mp)) {
1406			xfs_warn(mp,
1407				"Quotacheck: Failed to reset quota flags.");
1408		}
1409	} else
1410		xfs_notice(mp, "Quotacheck: Done.");
1411	return error;
1412}
1413
1414/*
1415 * This is called from xfs_mountfs to start quotas and initialize all
1416 * necessary data structures like quotainfo.  This is also responsible for
1417 * running a quotacheck as necessary.  We are guaranteed that the superblock
1418 * is consistently read in at this point.
1419 *
1420 * If we fail here, the mount will continue with quota turned off. We don't
1421 * need to inidicate success or failure at all.
1422 */
1423void
1424xfs_qm_mount_quotas(
1425	struct xfs_mount	*mp)
1426{
1427	int			error = 0;
1428	uint			sbf;
1429
1430	/*
1431	 * If quotas on realtime volumes is not supported, we disable
1432	 * quotas immediately.
1433	 */
1434	if (mp->m_sb.sb_rextents) {
1435		xfs_notice(mp, "Cannot turn on quotas for realtime filesystem");
1436		mp->m_qflags = 0;
1437		goto write_changes;
1438	}
1439
1440	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1441
1442	/*
1443	 * Allocate the quotainfo structure inside the mount struct, and
1444	 * create quotainode(s), and change/rev superblock if necessary.
1445	 */
1446	error = xfs_qm_init_quotainfo(mp);
1447	if (error) {
1448		/*
1449		 * We must turn off quotas.
1450		 */
1451		ASSERT(mp->m_quotainfo == NULL);
1452		mp->m_qflags = 0;
1453		goto write_changes;
1454	}
1455	/*
1456	 * If any of the quotas are not consistent, do a quotacheck.
1457	 */
1458	if (XFS_QM_NEED_QUOTACHECK(mp)) {
1459		error = xfs_qm_quotacheck(mp);
1460		if (error) {
1461			/* Quotacheck failed and disabled quotas. */
1462			return;
1463		}
1464	}
1465	/*
1466	 * If one type of quotas is off, then it will lose its
1467	 * quotachecked status, since we won't be doing accounting for
1468	 * that type anymore.
1469	 */
1470	if (!XFS_IS_UQUOTA_ON(mp))
1471		mp->m_qflags &= ~XFS_UQUOTA_CHKD;
1472	if (!XFS_IS_GQUOTA_ON(mp))
1473		mp->m_qflags &= ~XFS_GQUOTA_CHKD;
1474	if (!XFS_IS_PQUOTA_ON(mp))
1475		mp->m_qflags &= ~XFS_PQUOTA_CHKD;
1476
1477 write_changes:
1478	/*
1479	 * We actually don't have to acquire the m_sb_lock at all.
1480	 * This can only be called from mount, and that's single threaded. XXX
1481	 */
1482	spin_lock(&mp->m_sb_lock);
1483	sbf = mp->m_sb.sb_qflags;
1484	mp->m_sb.sb_qflags = mp->m_qflags & XFS_MOUNT_QUOTA_ALL;
1485	spin_unlock(&mp->m_sb_lock);
1486
1487	if (sbf != (mp->m_qflags & XFS_MOUNT_QUOTA_ALL)) {
1488		if (xfs_sync_sb(mp, false)) {
1489			/*
1490			 * We could only have been turning quotas off.
1491			 * We aren't in very good shape actually because
1492			 * the incore structures are convinced that quotas are
1493			 * off, but the on disk superblock doesn't know that !
1494			 */
1495			ASSERT(!(XFS_IS_QUOTA_RUNNING(mp)));
1496			xfs_alert(mp, "%s: Superblock update failed!",
1497				__func__);
1498		}
1499	}
1500
1501	if (error) {
1502		xfs_warn(mp, "Failed to initialize disk quotas.");
1503		return;
1504	}
1505}
1506
1507/*
1508 * This is called after the superblock has been read in and we're ready to
1509 * iget the quota inodes.
1510 */
1511STATIC int
1512xfs_qm_init_quotainos(
1513	xfs_mount_t	*mp)
1514{
1515	struct xfs_inode	*uip = NULL;
1516	struct xfs_inode	*gip = NULL;
1517	struct xfs_inode	*pip = NULL;
1518	int			error;
1519	uint			flags = 0;
1520
1521	ASSERT(mp->m_quotainfo);
1522
1523	/*
1524	 * Get the uquota and gquota inodes
1525	 */
1526	if (xfs_sb_version_hasquota(&mp->m_sb)) {
1527		if (XFS_IS_UQUOTA_ON(mp) &&
1528		    mp->m_sb.sb_uquotino != NULLFSINO) {
1529			ASSERT(mp->m_sb.sb_uquotino > 0);
1530			error = xfs_iget(mp, NULL, mp->m_sb.sb_uquotino,
1531					     0, 0, &uip);
1532			if (error)
1533				return error;
1534		}
1535		if (XFS_IS_GQUOTA_ON(mp) &&
1536		    mp->m_sb.sb_gquotino != NULLFSINO) {
1537			ASSERT(mp->m_sb.sb_gquotino > 0);
1538			error = xfs_iget(mp, NULL, mp->m_sb.sb_gquotino,
1539					     0, 0, &gip);
1540			if (error)
1541				goto error_rele;
1542		}
1543		if (XFS_IS_PQUOTA_ON(mp) &&
1544		    mp->m_sb.sb_pquotino != NULLFSINO) {
1545			ASSERT(mp->m_sb.sb_pquotino > 0);
1546			error = xfs_iget(mp, NULL, mp->m_sb.sb_pquotino,
1547					     0, 0, &pip);
1548			if (error)
1549				goto error_rele;
1550		}
1551	} else {
1552		flags |= XFS_QMOPT_SBVERSION;
1553	}
1554
1555	/*
1556	 * Create the three inodes, if they don't exist already. The changes
1557	 * made above will get added to a transaction and logged in one of
1558	 * the qino_alloc calls below.  If the device is readonly,
1559	 * temporarily switch to read-write to do this.
1560	 */
1561	if (XFS_IS_UQUOTA_ON(mp) && uip == NULL) {
1562		error = xfs_qm_qino_alloc(mp, &uip,
1563					      flags | XFS_QMOPT_UQUOTA);
1564		if (error)
1565			goto error_rele;
1566
1567		flags &= ~XFS_QMOPT_SBVERSION;
1568	}
1569	if (XFS_IS_GQUOTA_ON(mp) && gip == NULL) {
1570		error = xfs_qm_qino_alloc(mp, &gip,
1571					  flags | XFS_QMOPT_GQUOTA);
1572		if (error)
1573			goto error_rele;
1574
1575		flags &= ~XFS_QMOPT_SBVERSION;
1576	}
1577	if (XFS_IS_PQUOTA_ON(mp) && pip == NULL) {
1578		error = xfs_qm_qino_alloc(mp, &pip,
1579					  flags | XFS_QMOPT_PQUOTA);
1580		if (error)
1581			goto error_rele;
1582	}
1583
1584	mp->m_quotainfo->qi_uquotaip = uip;
1585	mp->m_quotainfo->qi_gquotaip = gip;
1586	mp->m_quotainfo->qi_pquotaip = pip;
1587
1588	return 0;
1589
1590error_rele:
1591	if (uip)
1592		IRELE(uip);
1593	if (gip)
1594		IRELE(gip);
1595	if (pip)
1596		IRELE(pip);
1597	return error;
1598}
1599
1600STATIC void
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1601xfs_qm_dqfree_one(
1602	struct xfs_dquot	*dqp)
1603{
1604	struct xfs_mount	*mp = dqp->q_mount;
1605	struct xfs_quotainfo	*qi = mp->m_quotainfo;
1606
1607	mutex_lock(&qi->qi_tree_lock);
1608	radix_tree_delete(xfs_dquot_tree(qi, dqp->q_core.d_flags),
1609			  be32_to_cpu(dqp->q_core.d_id));
1610
1611	qi->qi_dquots--;
1612	mutex_unlock(&qi->qi_tree_lock);
1613
1614	xfs_qm_dqdestroy(dqp);
1615}
1616
1617/* --------------- utility functions for vnodeops ---------------- */
1618
1619
1620/*
1621 * Given an inode, a uid, gid and prid make sure that we have
1622 * allocated relevant dquot(s) on disk, and that we won't exceed inode
1623 * quotas by creating this file.
1624 * This also attaches dquot(s) to the given inode after locking it,
1625 * and returns the dquots corresponding to the uid and/or gid.
1626 *
1627 * in	: inode (unlocked)
1628 * out	: udquot, gdquot with references taken and unlocked
1629 */
1630int
1631xfs_qm_vop_dqalloc(
1632	struct xfs_inode	*ip,
1633	xfs_dqid_t		uid,
1634	xfs_dqid_t		gid,
1635	prid_t			prid,
1636	uint			flags,
1637	struct xfs_dquot	**O_udqpp,
1638	struct xfs_dquot	**O_gdqpp,
1639	struct xfs_dquot	**O_pdqpp)
1640{
1641	struct xfs_mount	*mp = ip->i_mount;
 
 
1642	struct xfs_dquot	*uq = NULL;
1643	struct xfs_dquot	*gq = NULL;
1644	struct xfs_dquot	*pq = NULL;
1645	int			error;
1646	uint			lockflags;
1647
1648	if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1649		return 0;
1650
1651	lockflags = XFS_ILOCK_EXCL;
1652	xfs_ilock(ip, lockflags);
1653
1654	if ((flags & XFS_QMOPT_INHERIT) && XFS_INHERIT_GID(ip))
1655		gid = ip->i_d.di_gid;
1656
1657	/*
1658	 * Attach the dquot(s) to this inode, doing a dquot allocation
1659	 * if necessary. The dquot(s) will not be locked.
1660	 */
1661	if (XFS_NOT_DQATTACHED(mp, ip)) {
1662		error = xfs_qm_dqattach_locked(ip, XFS_QMOPT_DQALLOC);
1663		if (error) {
1664			xfs_iunlock(ip, lockflags);
1665			return error;
1666		}
1667	}
1668
1669	if ((flags & XFS_QMOPT_UQUOTA) && XFS_IS_UQUOTA_ON(mp)) {
1670		if (ip->i_d.di_uid != uid) {
 
1671			/*
1672			 * What we need is the dquot that has this uid, and
1673			 * if we send the inode to dqget, the uid of the inode
1674			 * takes priority over what's sent in the uid argument.
1675			 * We must unlock inode here before calling dqget if
1676			 * we're not sending the inode, because otherwise
1677			 * we'll deadlock by doing trans_reserve while
1678			 * holding ilock.
1679			 */
1680			xfs_iunlock(ip, lockflags);
1681			error = xfs_qm_dqget(mp, NULL, uid,
1682						 XFS_DQ_USER,
1683						 XFS_QMOPT_DQALLOC |
1684						 XFS_QMOPT_DOWARN,
1685						 &uq);
1686			if (error) {
1687				ASSERT(error != -ENOENT);
1688				return error;
1689			}
1690			/*
1691			 * Get the ilock in the right order.
1692			 */
1693			xfs_dqunlock(uq);
1694			lockflags = XFS_ILOCK_SHARED;
1695			xfs_ilock(ip, lockflags);
1696		} else {
1697			/*
1698			 * Take an extra reference, because we'll return
1699			 * this to caller
1700			 */
1701			ASSERT(ip->i_udquot);
1702			uq = xfs_qm_dqhold(ip->i_udquot);
1703		}
1704	}
1705	if ((flags & XFS_QMOPT_GQUOTA) && XFS_IS_GQUOTA_ON(mp)) {
1706		if (ip->i_d.di_gid != gid) {
 
1707			xfs_iunlock(ip, lockflags);
1708			error = xfs_qm_dqget(mp, NULL, gid,
1709						 XFS_DQ_GROUP,
1710						 XFS_QMOPT_DQALLOC |
1711						 XFS_QMOPT_DOWARN,
1712						 &gq);
1713			if (error) {
1714				ASSERT(error != -ENOENT);
1715				goto error_rele;
1716			}
1717			xfs_dqunlock(gq);
1718			lockflags = XFS_ILOCK_SHARED;
1719			xfs_ilock(ip, lockflags);
1720		} else {
1721			ASSERT(ip->i_gdquot);
1722			gq = xfs_qm_dqhold(ip->i_gdquot);
1723		}
1724	}
1725	if ((flags & XFS_QMOPT_PQUOTA) && XFS_IS_PQUOTA_ON(mp)) {
1726		if (xfs_get_projid(ip) != prid) {
 
1727			xfs_iunlock(ip, lockflags);
1728			error = xfs_qm_dqget(mp, NULL, (xfs_dqid_t)prid,
1729						 XFS_DQ_PROJ,
1730						 XFS_QMOPT_DQALLOC |
1731						 XFS_QMOPT_DOWARN,
1732						 &pq);
1733			if (error) {
1734				ASSERT(error != -ENOENT);
1735				goto error_rele;
1736			}
1737			xfs_dqunlock(pq);
1738			lockflags = XFS_ILOCK_SHARED;
1739			xfs_ilock(ip, lockflags);
1740		} else {
1741			ASSERT(ip->i_pdquot);
1742			pq = xfs_qm_dqhold(ip->i_pdquot);
1743		}
1744	}
1745	if (uq)
1746		trace_xfs_dquot_dqalloc(ip);
1747
1748	xfs_iunlock(ip, lockflags);
1749	if (O_udqpp)
1750		*O_udqpp = uq;
1751	else
1752		xfs_qm_dqrele(uq);
1753	if (O_gdqpp)
1754		*O_gdqpp = gq;
1755	else
1756		xfs_qm_dqrele(gq);
1757	if (O_pdqpp)
1758		*O_pdqpp = pq;
1759	else
1760		xfs_qm_dqrele(pq);
1761	return 0;
1762
1763error_rele:
1764	xfs_qm_dqrele(gq);
1765	xfs_qm_dqrele(uq);
1766	return error;
1767}
1768
1769/*
1770 * Actually transfer ownership, and do dquot modifications.
1771 * These were already reserved.
1772 */
1773xfs_dquot_t *
1774xfs_qm_vop_chown(
1775	xfs_trans_t	*tp,
1776	xfs_inode_t	*ip,
1777	xfs_dquot_t	**IO_olddq,
1778	xfs_dquot_t	*newdq)
1779{
1780	xfs_dquot_t	*prevdq;
1781	uint		bfield = XFS_IS_REALTIME_INODE(ip) ?
1782				 XFS_TRANS_DQ_RTBCOUNT : XFS_TRANS_DQ_BCOUNT;
1783
1784
1785	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1786	ASSERT(XFS_IS_QUOTA_RUNNING(ip->i_mount));
1787
1788	/* old dquot */
1789	prevdq = *IO_olddq;
1790	ASSERT(prevdq);
1791	ASSERT(prevdq != newdq);
1792
1793	xfs_trans_mod_dquot(tp, prevdq, bfield, -(ip->i_d.di_nblocks));
1794	xfs_trans_mod_dquot(tp, prevdq, XFS_TRANS_DQ_ICOUNT, -1);
1795
1796	/* the sparkling new dquot */
1797	xfs_trans_mod_dquot(tp, newdq, bfield, ip->i_d.di_nblocks);
1798	xfs_trans_mod_dquot(tp, newdq, XFS_TRANS_DQ_ICOUNT, 1);
1799
1800	/*
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1801	 * Take an extra reference, because the inode is going to keep
1802	 * this dquot pointer even after the trans_commit.
1803	 */
1804	*IO_olddq = xfs_qm_dqhold(newdq);
1805
1806	return prevdq;
1807}
1808
1809/*
1810 * Quota reservations for setattr(AT_UID|AT_GID|AT_PROJID).
1811 */
1812int
1813xfs_qm_vop_chown_reserve(
1814	struct xfs_trans	*tp,
1815	struct xfs_inode	*ip,
1816	struct xfs_dquot	*udqp,
1817	struct xfs_dquot	*gdqp,
1818	struct xfs_dquot	*pdqp,
1819	uint			flags)
1820{
1821	struct xfs_mount	*mp = ip->i_mount;
1822	uint			delblks, blkflags, prjflags = 0;
1823	struct xfs_dquot	*udq_unres = NULL;
1824	struct xfs_dquot	*gdq_unres = NULL;
1825	struct xfs_dquot	*pdq_unres = NULL;
1826	struct xfs_dquot	*udq_delblks = NULL;
1827	struct xfs_dquot	*gdq_delblks = NULL;
1828	struct xfs_dquot	*pdq_delblks = NULL;
1829	int			error;
1830
1831
1832	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL|XFS_ILOCK_SHARED));
1833	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1834
1835	delblks = ip->i_delayed_blks;
1836	blkflags = XFS_IS_REALTIME_INODE(ip) ?
1837			XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;
1838
1839	if (XFS_IS_UQUOTA_ON(mp) && udqp &&
1840	    ip->i_d.di_uid != be32_to_cpu(udqp->q_core.d_id)) {
1841		udq_delblks = udqp;
1842		/*
1843		 * If there are delayed allocation blocks, then we have to
1844		 * unreserve those from the old dquot, and add them to the
1845		 * new dquot.
1846		 */
1847		if (delblks) {
1848			ASSERT(ip->i_udquot);
1849			udq_unres = ip->i_udquot;
1850		}
1851	}
1852	if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
1853	    ip->i_d.di_gid != be32_to_cpu(gdqp->q_core.d_id)) {
1854		gdq_delblks = gdqp;
1855		if (delblks) {
1856			ASSERT(ip->i_gdquot);
1857			gdq_unres = ip->i_gdquot;
1858		}
1859	}
1860
1861	if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
1862	    xfs_get_projid(ip) != be32_to_cpu(pdqp->q_core.d_id)) {
1863		prjflags = XFS_QMOPT_ENOSPC;
1864		pdq_delblks = pdqp;
1865		if (delblks) {
1866			ASSERT(ip->i_pdquot);
1867			pdq_unres = ip->i_pdquot;
1868		}
1869	}
1870
1871	error = xfs_trans_reserve_quota_bydquots(tp, ip->i_mount,
1872				udq_delblks, gdq_delblks, pdq_delblks,
1873				ip->i_d.di_nblocks, 1,
1874				flags | blkflags | prjflags);
1875	if (error)
1876		return error;
1877
1878	/*
1879	 * Do the delayed blks reservations/unreservations now. Since, these
1880	 * are done without the help of a transaction, if a reservation fails
1881	 * its previous reservations won't be automatically undone by trans
1882	 * code. So, we have to do it manually here.
1883	 */
1884	if (delblks) {
1885		/*
1886		 * Do the reservations first. Unreservation can't fail.
1887		 */
1888		ASSERT(udq_delblks || gdq_delblks || pdq_delblks);
1889		ASSERT(udq_unres || gdq_unres || pdq_unres);
1890		error = xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1891			    udq_delblks, gdq_delblks, pdq_delblks,
1892			    (xfs_qcnt_t)delblks, 0,
1893			    flags | blkflags | prjflags);
1894		if (error)
1895			return error;
1896		xfs_trans_reserve_quota_bydquots(NULL, ip->i_mount,
1897				udq_unres, gdq_unres, pdq_unres,
1898				-((xfs_qcnt_t)delblks), 0, blkflags);
1899	}
1900
1901	return 0;
1902}
1903
1904int
1905xfs_qm_vop_rename_dqattach(
1906	struct xfs_inode	**i_tab)
1907{
1908	struct xfs_mount	*mp = i_tab[0]->i_mount;
1909	int			i;
1910
1911	if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1912		return 0;
1913
1914	for (i = 0; (i < 4 && i_tab[i]); i++) {
1915		struct xfs_inode	*ip = i_tab[i];
1916		int			error;
1917
1918		/*
1919		 * Watch out for duplicate entries in the table.
1920		 */
1921		if (i == 0 || ip != i_tab[i-1]) {
1922			if (XFS_NOT_DQATTACHED(mp, ip)) {
1923				error = xfs_qm_dqattach(ip, 0);
1924				if (error)
1925					return error;
1926			}
1927		}
1928	}
1929	return 0;
1930}
1931
1932void
1933xfs_qm_vop_create_dqattach(
1934	struct xfs_trans	*tp,
1935	struct xfs_inode	*ip,
1936	struct xfs_dquot	*udqp,
1937	struct xfs_dquot	*gdqp,
1938	struct xfs_dquot	*pdqp)
1939{
1940	struct xfs_mount	*mp = tp->t_mountp;
1941
1942	if (!XFS_IS_QUOTA_RUNNING(mp) || !XFS_IS_QUOTA_ON(mp))
1943		return;
1944
1945	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
1946	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
1947
1948	if (udqp && XFS_IS_UQUOTA_ON(mp)) {
1949		ASSERT(ip->i_udquot == NULL);
1950		ASSERT(ip->i_d.di_uid == be32_to_cpu(udqp->q_core.d_id));
1951
1952		ip->i_udquot = xfs_qm_dqhold(udqp);
1953		xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
1954	}
1955	if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
1956		ASSERT(ip->i_gdquot == NULL);
1957		ASSERT(ip->i_d.di_gid == be32_to_cpu(gdqp->q_core.d_id));
 
1958		ip->i_gdquot = xfs_qm_dqhold(gdqp);
1959		xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
1960	}
1961	if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
1962		ASSERT(ip->i_pdquot == NULL);
1963		ASSERT(xfs_get_projid(ip) == be32_to_cpu(pdqp->q_core.d_id));
1964
1965		ip->i_pdquot = xfs_qm_dqhold(pdqp);
1966		xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
1967	}
1968}
1969