quota_local.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  Implementation of operations over local quota file
   4 */
   5
   6#include <linux/fs.h>
   7#include <linux/slab.h>
   8#include <linux/quota.h>
   9#include <linux/quotaops.h>
  10#include <linux/module.h>
  11
  12#include <cluster/masklog.h>
  13
  14#include "ocfs2_fs.h"
  15#include "ocfs2.h"
  16#include "inode.h"
  17#include "alloc.h"
  18#include "file.h"
  19#include "buffer_head_io.h"
  20#include "journal.h"
  21#include "sysfile.h"
  22#include "dlmglue.h"
  23#include "quota.h"
  24#include "uptodate.h"
  25#include "super.h"
  26#include "ocfs2_trace.h"
  27
  28/* Number of local quota structures per block */
  29static inline unsigned int ol_quota_entries_per_block(struct super_block *sb)
  30{
  31	return ((sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE) /
  32		sizeof(struct ocfs2_local_disk_dqblk));
  33}
  34
  35/* Number of blocks with entries in one chunk */
  36static inline unsigned int ol_chunk_blocks(struct super_block *sb)
  37{
  38	return ((sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
  39		 OCFS2_QBLK_RESERVED_SPACE) << 3) /
  40	       ol_quota_entries_per_block(sb);
  41}
  42
  43/* Number of entries in a chunk bitmap */
  44static unsigned int ol_chunk_entries(struct super_block *sb)
  45{
  46	return ol_chunk_blocks(sb) * ol_quota_entries_per_block(sb);
  47}
  48
  49/* Offset of the chunk in quota file */
  50static unsigned int ol_quota_chunk_block(struct super_block *sb, int c)
  51{
  52	/* 1 block for local quota file info, 1 block per chunk for chunk info */
  53	return 1 + (ol_chunk_blocks(sb) + 1) * c;
  54}
  55
  56static unsigned int ol_dqblk_block(struct super_block *sb, int c, int off)
  57{
  58	int epb = ol_quota_entries_per_block(sb);
  59
  60	return ol_quota_chunk_block(sb, c) + 1 + off / epb;
  61}
  62
  63static unsigned int ol_dqblk_block_off(struct super_block *sb, int c, int off)
  64{
  65	int epb = ol_quota_entries_per_block(sb);
  66
  67	return (off % epb) * sizeof(struct ocfs2_local_disk_dqblk);
  68}
  69
  70/* Offset of the dquot structure in the quota file */
  71static loff_t ol_dqblk_off(struct super_block *sb, int c, int off)
  72{
  73	return (ol_dqblk_block(sb, c, off) << sb->s_blocksize_bits) +
  74	       ol_dqblk_block_off(sb, c, off);
  75}
  76
  77static inline unsigned int ol_dqblk_block_offset(struct super_block *sb, loff_t off)
  78{
  79	return off & ((1 << sb->s_blocksize_bits) - 1);
  80}
  81
  82/* Compute offset in the chunk of a structure with the given offset */
  83static int ol_dqblk_chunk_off(struct super_block *sb, int c, loff_t off)
  84{
  85	int epb = ol_quota_entries_per_block(sb);
  86
  87	return ((off >> sb->s_blocksize_bits) -
  88			ol_quota_chunk_block(sb, c) - 1) * epb
  89	       + ((unsigned int)(off & ((1 << sb->s_blocksize_bits) - 1))) /
  90		 sizeof(struct ocfs2_local_disk_dqblk);
  91}
  92
  93/* Write bufferhead into the fs */
  94static int ocfs2_modify_bh(struct inode *inode, struct buffer_head *bh,
  95		void (*modify)(struct buffer_head *, void *), void *private)
  96{
  97	struct super_block *sb = inode->i_sb;
  98	handle_t *handle;
  99	int status;
 100
 101	handle = ocfs2_start_trans(OCFS2_SB(sb),
 102				   OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
 103	if (IS_ERR(handle)) {
 104		status = PTR_ERR(handle);
 105		mlog_errno(status);
 106		return status;
 107	}
 108	status = ocfs2_journal_access_dq(handle, INODE_CACHE(inode), bh,
 109					 OCFS2_JOURNAL_ACCESS_WRITE);
 110	if (status < 0) {
 111		mlog_errno(status);
 112		ocfs2_commit_trans(OCFS2_SB(sb), handle);
 113		return status;
 114	}
 115	lock_buffer(bh);
 116	modify(bh, private);
 117	unlock_buffer(bh);
 118	ocfs2_journal_dirty(handle, bh);
 119
 120	status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
 121	if (status < 0) {
 122		mlog_errno(status);
 123		return status;
 124	}
 125	return 0;
 126}
 127
 128/*
 129 * Read quota block from a given logical offset.
 130 *
 131 * This function acquires ip_alloc_sem and thus it must not be called with a
 132 * transaction started.
 133 */
 134static int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
 135				  struct buffer_head **bh)
 136{
 137	int rc = 0;
 138	struct buffer_head *tmp = *bh;
 139
 140	if (i_size_read(inode) >> inode->i_sb->s_blocksize_bits <= v_block)
 141		return ocfs2_error(inode->i_sb,
 142				"Quota file %llu is probably corrupted! Requested to read block %Lu but file has size only %Lu\n",
 143				(unsigned long long)OCFS2_I(inode)->ip_blkno,
 144				(unsigned long long)v_block,
 145				(unsigned long long)i_size_read(inode));
 146
 147	rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
 148				    ocfs2_validate_quota_block);
 149	if (rc)
 150		mlog_errno(rc);
 151
 152	/* If ocfs2_read_virt_blocks() got us a new bh, pass it up. */
 153	if (!rc && !*bh)
 154		*bh = tmp;
 155
 156	return rc;
 157}
 158
 159/* Check whether we understand format of quota files */
 160static int ocfs2_local_check_quota_file(struct super_block *sb, int type)
 161{
 162	unsigned int lmagics[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QMAGICS;
 163	unsigned int lversions[OCFS2_MAXQUOTAS] = OCFS2_LOCAL_QVERSIONS;
 164	unsigned int gmagics[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QMAGICS;
 165	unsigned int gversions[OCFS2_MAXQUOTAS] = OCFS2_GLOBAL_QVERSIONS;
 166	unsigned int ino[OCFS2_MAXQUOTAS] = { USER_QUOTA_SYSTEM_INODE,
 167					      GROUP_QUOTA_SYSTEM_INODE };
 168	struct buffer_head *bh = NULL;
 169	struct inode *linode = sb_dqopt(sb)->files[type];
 170	struct inode *ginode = NULL;
 171	struct ocfs2_disk_dqheader *dqhead;
 172	int status, ret = 0;
 173
 174	/* First check whether we understand local quota file */
 175	status = ocfs2_read_quota_block(linode, 0, &bh);
 176	if (status) {
 177		mlog_errno(status);
 178		mlog(ML_ERROR, "failed to read quota file header (type=%d)\n",
 179			type);
 180		goto out_err;
 181	}
 182	dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 183	if (le32_to_cpu(dqhead->dqh_magic) != lmagics[type]) {
 184		mlog(ML_ERROR, "quota file magic does not match (%u != %u),"
 185			" type=%d\n", le32_to_cpu(dqhead->dqh_magic),
 186			lmagics[type], type);
 187		goto out_err;
 188	}
 189	if (le32_to_cpu(dqhead->dqh_version) != lversions[type]) {
 190		mlog(ML_ERROR, "quota file version does not match (%u != %u),"
 191			" type=%d\n", le32_to_cpu(dqhead->dqh_version),
 192			lversions[type], type);
 193		goto out_err;
 194	}
 195	brelse(bh);
 196	bh = NULL;
 197
 198	/* Next check whether we understand global quota file */
 199	ginode = ocfs2_get_system_file_inode(OCFS2_SB(sb), ino[type],
 200						OCFS2_INVALID_SLOT);
 201	if (!ginode) {
 202		mlog(ML_ERROR, "cannot get global quota file inode "
 203				"(type=%d)\n", type);
 204		goto out_err;
 205	}
 206	/* Since the header is read only, we don't care about locking */
 207	status = ocfs2_read_quota_block(ginode, 0, &bh);
 208	if (status) {
 209		mlog_errno(status);
 210		mlog(ML_ERROR, "failed to read global quota file header "
 211				"(type=%d)\n", type);
 212		goto out_err;
 213	}
 214	dqhead = (struct ocfs2_disk_dqheader *)(bh->b_data);
 215	if (le32_to_cpu(dqhead->dqh_magic) != gmagics[type]) {
 216		mlog(ML_ERROR, "global quota file magic does not match "
 217			"(%u != %u), type=%d\n",
 218			le32_to_cpu(dqhead->dqh_magic), gmagics[type], type);
 219		goto out_err;
 220	}
 221	if (le32_to_cpu(dqhead->dqh_version) != gversions[type]) {
 222		mlog(ML_ERROR, "global quota file version does not match "
 223			"(%u != %u), type=%d\n",
 224			le32_to_cpu(dqhead->dqh_version), gversions[type],
 225			type);
 226		goto out_err;
 227	}
 228
 229	ret = 1;
 230out_err:
 231	brelse(bh);
 232	iput(ginode);
 233	return ret;
 234}
 235
 236/* Release given list of quota file chunks */
 237static void ocfs2_release_local_quota_bitmaps(struct list_head *head)
 238{
 239	struct ocfs2_quota_chunk *pos, *next;
 240
 241	list_for_each_entry_safe(pos, next, head, qc_chunk) {
 242		list_del(&pos->qc_chunk);
 243		brelse(pos->qc_headerbh);
 244		kmem_cache_free(ocfs2_qf_chunk_cachep, pos);
 245	}
 246}
 247
 248/* Load quota bitmaps into memory */
 249static int ocfs2_load_local_quota_bitmaps(struct inode *inode,
 250			struct ocfs2_local_disk_dqinfo *ldinfo,
 251			struct list_head *head)
 252{
 253	struct ocfs2_quota_chunk *newchunk;
 254	int i, status;
 255
 256	INIT_LIST_HEAD(head);
 257	for (i = 0; i < le32_to_cpu(ldinfo->dqi_chunks); i++) {
 258		newchunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 259		if (!newchunk) {
 260			ocfs2_release_local_quota_bitmaps(head);
 261			return -ENOMEM;
 262		}
 263		newchunk->qc_num = i;
 264		newchunk->qc_headerbh = NULL;
 265		status = ocfs2_read_quota_block(inode,
 266				ol_quota_chunk_block(inode->i_sb, i),
 267				&newchunk->qc_headerbh);
 268		if (status) {
 269			mlog_errno(status);
 270			kmem_cache_free(ocfs2_qf_chunk_cachep, newchunk);
 271			ocfs2_release_local_quota_bitmaps(head);
 272			return status;
 273		}
 274		list_add_tail(&newchunk->qc_chunk, head);
 275	}
 276	return 0;
 277}
 278
 279static void olq_update_info(struct buffer_head *bh, void *private)
 280{
 281	struct mem_dqinfo *info = private;
 282	struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 283	struct ocfs2_local_disk_dqinfo *ldinfo;
 284
 285	ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 286						OCFS2_LOCAL_INFO_OFF);
 287	spin_lock(&dq_data_lock);
 288	ldinfo->dqi_flags = cpu_to_le32(oinfo->dqi_flags);
 289	ldinfo->dqi_chunks = cpu_to_le32(oinfo->dqi_chunks);
 290	ldinfo->dqi_blocks = cpu_to_le32(oinfo->dqi_blocks);
 291	spin_unlock(&dq_data_lock);
 292}
 293
 294static int ocfs2_add_recovery_chunk(struct super_block *sb,
 295				    struct ocfs2_local_disk_chunk *dchunk,
 296				    int chunk,
 297				    struct list_head *head)
 298{
 299	struct ocfs2_recovery_chunk *rc;
 300
 301	rc = kmalloc(sizeof(struct ocfs2_recovery_chunk), GFP_NOFS);
 302	if (!rc)
 303		return -ENOMEM;
 304	rc->rc_chunk = chunk;
 305	rc->rc_bitmap = kmalloc(sb->s_blocksize, GFP_NOFS);
 306	if (!rc->rc_bitmap) {
 307		kfree(rc);
 308		return -ENOMEM;
 309	}
 310	memcpy(rc->rc_bitmap, dchunk->dqc_bitmap,
 311	       (ol_chunk_entries(sb) + 7) >> 3);
 312	list_add_tail(&rc->rc_list, head);
 313	return 0;
 314}
 315
 316static void free_recovery_list(struct list_head *head)
 317{
 318	struct ocfs2_recovery_chunk *next;
 319	struct ocfs2_recovery_chunk *rchunk;
 320
 321	list_for_each_entry_safe(rchunk, next, head, rc_list) {
 322		list_del(&rchunk->rc_list);
 323		kfree(rchunk->rc_bitmap);
 324		kfree(rchunk);
 325	}
 326}
 327
 328void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec)
 329{
 330	int type;
 331
 332	for (type = 0; type < OCFS2_MAXQUOTAS; type++)
 333		free_recovery_list(&(rec->r_list[type]));
 334	kfree(rec);
 335}
 336
 337/* Load entries in our quota file we have to recover*/
 338static int ocfs2_recovery_load_quota(struct inode *lqinode,
 339				     struct ocfs2_local_disk_dqinfo *ldinfo,
 340				     int type,
 341				     struct list_head *head)
 342{
 343	struct super_block *sb = lqinode->i_sb;
 344	struct buffer_head *hbh;
 345	struct ocfs2_local_disk_chunk *dchunk;
 346	int i, chunks = le32_to_cpu(ldinfo->dqi_chunks);
 347	int status = 0;
 348
 349	for (i = 0; i < chunks; i++) {
 350		hbh = NULL;
 351		status = ocfs2_read_quota_block(lqinode,
 352						ol_quota_chunk_block(sb, i),
 353						&hbh);
 354		if (status) {
 355			mlog_errno(status);
 356			break;
 357		}
 358		dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 359		if (le32_to_cpu(dchunk->dqc_free) < ol_chunk_entries(sb))
 360			status = ocfs2_add_recovery_chunk(sb, dchunk, i, head);
 361		brelse(hbh);
 362		if (status < 0)
 363			break;
 364	}
 365	if (status < 0)
 366		free_recovery_list(head);
 367	return status;
 368}
 369
 370static struct ocfs2_quota_recovery *ocfs2_alloc_quota_recovery(void)
 371{
 372	int type;
 373	struct ocfs2_quota_recovery *rec;
 374
 375	rec = kmalloc(sizeof(struct ocfs2_quota_recovery), GFP_NOFS);
 376	if (!rec)
 377		return NULL;
 378	for (type = 0; type < OCFS2_MAXQUOTAS; type++)
 379		INIT_LIST_HEAD(&(rec->r_list[type]));
 380	return rec;
 381}
 382
 383/* Load information we need for quota recovery into memory */
 384struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
 385						struct ocfs2_super *osb,
 386						int slot_num)
 387{
 388	unsigned int feature[OCFS2_MAXQUOTAS] = {
 389					OCFS2_FEATURE_RO_COMPAT_USRQUOTA,
 390					OCFS2_FEATURE_RO_COMPAT_GRPQUOTA};
 391	unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 392					      LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 393	struct super_block *sb = osb->sb;
 394	struct ocfs2_local_disk_dqinfo *ldinfo;
 395	struct inode *lqinode;
 396	struct buffer_head *bh;
 397	int type;
 398	int status = 0;
 399	struct ocfs2_quota_recovery *rec;
 400
 401	printk(KERN_NOTICE "ocfs2: Beginning quota recovery on device (%s) for "
 402	       "slot %u\n", osb->dev_str, slot_num);
 403
 404	rec = ocfs2_alloc_quota_recovery();
 405	if (!rec)
 406		return ERR_PTR(-ENOMEM);
 407	/* First init... */
 408
 409	for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 410		if (!OCFS2_HAS_RO_COMPAT_FEATURE(sb, feature[type]))
 411			continue;
 412		/* At this point, journal of the slot is already replayed so
 413		 * we can trust metadata and data of the quota file */
 414		lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 415		if (!lqinode) {
 416			status = -ENOENT;
 417			goto out;
 418		}
 419		status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 420					       OCFS2_META_LOCK_RECOVERY);
 421		if (status < 0) {
 422			mlog_errno(status);
 423			goto out_put;
 424		}
 425		/* Now read local header */
 426		bh = NULL;
 427		status = ocfs2_read_quota_block(lqinode, 0, &bh);
 428		if (status) {
 429			mlog_errno(status);
 430			mlog(ML_ERROR, "failed to read quota file info header "
 431				"(slot=%d type=%d)\n", slot_num, type);
 432			goto out_lock;
 433		}
 434		ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 435							OCFS2_LOCAL_INFO_OFF);
 436		status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 437						   &rec->r_list[type]);
 438		brelse(bh);
 439out_lock:
 440		ocfs2_inode_unlock(lqinode, 1);
 441out_put:
 442		iput(lqinode);
 443		if (status < 0)
 444			break;
 445	}
 446out:
 447	if (status < 0) {
 448		ocfs2_free_quota_recovery(rec);
 449		rec = ERR_PTR(status);
 450	}
 451	return rec;
 452}
 453
 454/* Sync changes in local quota file into global quota file and
 455 * reinitialize local quota file.
 456 * The function expects local quota file to be already locked. */
 457static int ocfs2_recover_local_quota_file(struct inode *lqinode,
 458					  int type,
 459					  struct ocfs2_quota_recovery *rec)
 460{
 461	struct super_block *sb = lqinode->i_sb;
 462	struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
 463	struct ocfs2_local_disk_chunk *dchunk;
 464	struct ocfs2_local_disk_dqblk *dqblk;
 465	struct dquot *dquot;
 466	handle_t *handle;
 467	struct buffer_head *hbh = NULL, *qbh = NULL;
 468	int status = 0;
 469	int bit, chunk;
 470	struct ocfs2_recovery_chunk *rchunk, *next;
 471	qsize_t spacechange, inodechange;
 472	unsigned int memalloc;
 473
 474	trace_ocfs2_recover_local_quota_file((unsigned long)lqinode->i_ino, type);
 475
 476	list_for_each_entry_safe(rchunk, next, &(rec->r_list[type]), rc_list) {
 477		chunk = rchunk->rc_chunk;
 478		hbh = NULL;
 479		status = ocfs2_read_quota_block(lqinode,
 480						ol_quota_chunk_block(sb, chunk),
 481						&hbh);
 482		if (status) {
 483			mlog_errno(status);
 484			break;
 485		}
 486		dchunk = (struct ocfs2_local_disk_chunk *)hbh->b_data;
 487		for_each_set_bit(bit, rchunk->rc_bitmap, ol_chunk_entries(sb)) {
 488			qbh = NULL;
 489			status = ocfs2_read_quota_block(lqinode,
 490						ol_dqblk_block(sb, chunk, bit),
 491						&qbh);
 492			if (status) {
 493				mlog_errno(status);
 494				break;
 495			}
 496			dqblk = (struct ocfs2_local_disk_dqblk *)(qbh->b_data +
 497				ol_dqblk_block_off(sb, chunk, bit));
 498			dquot = dqget(sb,
 499				      make_kqid(&init_user_ns, type,
 500						le64_to_cpu(dqblk->dqb_id)));
 501			if (IS_ERR(dquot)) {
 502				status = PTR_ERR(dquot);
 503				mlog(ML_ERROR, "Failed to get quota structure "
 504				     "for id %u, type %d. Cannot finish quota "
 505				     "file recovery.\n",
 506				     (unsigned)le64_to_cpu(dqblk->dqb_id),
 507				     type);
 508				goto out_put_bh;
 509			}
 510			status = ocfs2_lock_global_qf(oinfo, 1);
 511			if (status < 0) {
 512				mlog_errno(status);
 513				goto out_put_dquot;
 514			}
 515
 516			handle = ocfs2_start_trans(OCFS2_SB(sb),
 517						   OCFS2_QSYNC_CREDITS);
 518			if (IS_ERR(handle)) {
 519				status = PTR_ERR(handle);
 520				mlog_errno(status);
 521				goto out_drop_lock;
 522			}
 523			down_write(&sb_dqopt(sb)->dqio_sem);
 524			memalloc = memalloc_nofs_save();
 525			spin_lock(&dquot->dq_dqb_lock);
 526			/* Add usage from quota entry into quota changes
 527			 * of our node. Auxiliary variables are important
 528			 * due to signedness */
 529			spacechange = le64_to_cpu(dqblk->dqb_spacemod);
 530			inodechange = le64_to_cpu(dqblk->dqb_inodemod);
 531			dquot->dq_dqb.dqb_curspace += spacechange;
 532			dquot->dq_dqb.dqb_curinodes += inodechange;
 533			spin_unlock(&dquot->dq_dqb_lock);
 534			/* We want to drop reference held by the crashed
 535			 * node. Since we have our own reference we know
 536			 * global structure actually won't be freed. */
 537			status = ocfs2_global_release_dquot(dquot);
 538			if (status < 0) {
 539				mlog_errno(status);
 540				goto out_commit;
 541			}
 542			/* Release local quota file entry */
 543			status = ocfs2_journal_access_dq(handle,
 544					INODE_CACHE(lqinode),
 545					qbh, OCFS2_JOURNAL_ACCESS_WRITE);
 546			if (status < 0) {
 547				mlog_errno(status);
 548				goto out_commit;
 549			}
 550			lock_buffer(qbh);
 551			WARN_ON(!ocfs2_test_bit_unaligned(bit, dchunk->dqc_bitmap));
 552			ocfs2_clear_bit_unaligned(bit, dchunk->dqc_bitmap);
 553			le32_add_cpu(&dchunk->dqc_free, 1);
 554			unlock_buffer(qbh);
 555			ocfs2_journal_dirty(handle, qbh);
 556out_commit:
 557			memalloc_nofs_restore(memalloc);
 558			up_write(&sb_dqopt(sb)->dqio_sem);
 559			ocfs2_commit_trans(OCFS2_SB(sb), handle);
 560out_drop_lock:
 561			ocfs2_unlock_global_qf(oinfo, 1);
 562out_put_dquot:
 563			dqput(dquot);
 564out_put_bh:
 565			brelse(qbh);
 566			if (status < 0)
 567				break;
 568		}
 569		brelse(hbh);
 570		list_del(&rchunk->rc_list);
 571		kfree(rchunk->rc_bitmap);
 572		kfree(rchunk);
 573		if (status < 0)
 574			break;
 575	}
 576	if (status < 0)
 577		free_recovery_list(&(rec->r_list[type]));
 578	if (status)
 579		mlog_errno(status);
 580	return status;
 581}
 582
 583/* Recover local quota files for given node different from us */
 584int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
 585				struct ocfs2_quota_recovery *rec,
 586				int slot_num)
 587{
 588	unsigned int ino[OCFS2_MAXQUOTAS] = { LOCAL_USER_QUOTA_SYSTEM_INODE,
 589					      LOCAL_GROUP_QUOTA_SYSTEM_INODE };
 590	struct ocfs2_local_disk_dqinfo *ldinfo;
 591	struct buffer_head *bh;
 592	handle_t *handle;
 593	int type;
 594	int status = 0;
 595	struct inode *lqinode;
 596	unsigned int flags;
 597
 598	printk(KERN_NOTICE "ocfs2: Finishing quota recovery on device (%s) for "
 599	       "slot %u\n", osb->dev_str, slot_num);
 600
 601	for (type = 0; type < OCFS2_MAXQUOTAS; type++) {
 602		if (list_empty(&(rec->r_list[type])))
 603			continue;
 604		trace_ocfs2_finish_quota_recovery(slot_num);
 605		lqinode = ocfs2_get_system_file_inode(osb, ino[type], slot_num);
 606		if (!lqinode) {
 607			status = -ENOENT;
 608			goto out;
 609		}
 610		status = ocfs2_inode_lock_full(lqinode, NULL, 1,
 611						       OCFS2_META_LOCK_NOQUEUE);
 612		/* Someone else is holding the lock? Then he must be
 613		 * doing the recovery. Just skip the file... */
 614		if (status == -EAGAIN) {
 615			printk(KERN_NOTICE "ocfs2: Skipping quota recovery on "
 616			       "device (%s) for slot %d because quota file is "
 617			       "locked.\n", osb->dev_str, slot_num);
 618			status = 0;
 619			goto out_put;
 620		} else if (status < 0) {
 621			mlog_errno(status);
 622			goto out_put;
 623		}
 624		/* Now read local header */
 625		bh = NULL;
 626		status = ocfs2_read_quota_block(lqinode, 0, &bh);
 627		if (status) {
 628			mlog_errno(status);
 629			mlog(ML_ERROR, "failed to read quota file info header "
 630				"(slot=%d type=%d)\n", slot_num, type);
 631			goto out_lock;
 632		}
 633		ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 634							OCFS2_LOCAL_INFO_OFF);
 635		/* Is recovery still needed? */
 636		flags = le32_to_cpu(ldinfo->dqi_flags);
 637		if (!(flags & OLQF_CLEAN))
 638			status = ocfs2_recover_local_quota_file(lqinode,
 639								type,
 640								rec);
 641		/* We don't want to mark file as clean when it is actually
 642		 * active */
 643		if (slot_num == osb->slot_num)
 644			goto out_bh;
 645		/* Mark quota file as clean if we are recovering quota file of
 646		 * some other node. */
 647		handle = ocfs2_start_trans(osb,
 648					   OCFS2_LOCAL_QINFO_WRITE_CREDITS);
 649		if (IS_ERR(handle)) {
 650			status = PTR_ERR(handle);
 651			mlog_errno(status);
 652			goto out_bh;
 653		}
 654		status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
 655						 bh,
 656						 OCFS2_JOURNAL_ACCESS_WRITE);
 657		if (status < 0) {
 658			mlog_errno(status);
 659			goto out_trans;
 660		}
 661		lock_buffer(bh);
 662		ldinfo->dqi_flags = cpu_to_le32(flags | OLQF_CLEAN);
 663		unlock_buffer(bh);
 664		ocfs2_journal_dirty(handle, bh);
 665out_trans:
 666		ocfs2_commit_trans(osb, handle);
 667out_bh:
 668		brelse(bh);
 669out_lock:
 670		ocfs2_inode_unlock(lqinode, 1);
 671out_put:
 672		iput(lqinode);
 673		if (status < 0)
 674			break;
 675	}
 676out:
 677	ocfs2_free_quota_recovery(rec);
 678	return status;
 679}
 680
 681/* Read information header from quota file */
 682static int ocfs2_local_read_info(struct super_block *sb, int type)
 683{
 684	struct ocfs2_local_disk_dqinfo *ldinfo;
 685	struct mem_dqinfo *info = sb_dqinfo(sb, type);
 686	struct ocfs2_mem_dqinfo *oinfo;
 687	struct inode *lqinode = sb_dqopt(sb)->files[type];
 688	int status;
 689	struct buffer_head *bh = NULL;
 690	struct ocfs2_quota_recovery *rec;
 691	int locked = 0, global_read = 0;
 692
 693	info->dqi_max_spc_limit = 0x7fffffffffffffffLL;
 694	info->dqi_max_ino_limit = 0x7fffffffffffffffLL;
 695	oinfo = kmalloc(sizeof(struct ocfs2_mem_dqinfo), GFP_NOFS);
 696	if (!oinfo) {
 697		mlog(ML_ERROR, "failed to allocate memory for ocfs2 quota"
 698			       " info.");
 699		status = -ENOMEM;
 700		goto out_err;
 701	}
 702	info->dqi_priv = oinfo;
 703	oinfo->dqi_type = type;
 704	INIT_LIST_HEAD(&oinfo->dqi_chunk);
 705	oinfo->dqi_rec = NULL;
 706	oinfo->dqi_lqi_bh = NULL;
 707	oinfo->dqi_libh = NULL;
 708
 709	status = ocfs2_global_read_info(sb, type);
 710	if (status < 0)
 711		goto out_err;
 712	global_read = 1;
 713
 714	status = ocfs2_inode_lock(lqinode, &oinfo->dqi_lqi_bh, 1);
 715	if (status < 0) {
 716		mlog_errno(status);
 717		goto out_err;
 718	}
 719	locked = 1;
 720
 721	/* Now read local header */
 722	status = ocfs2_read_quota_block(lqinode, 0, &bh);
 723	if (status) {
 724		mlog_errno(status);
 725		mlog(ML_ERROR, "failed to read quota file info header "
 726			"(type=%d)\n", type);
 727		goto out_err;
 728	}
 729	ldinfo = (struct ocfs2_local_disk_dqinfo *)(bh->b_data +
 730						OCFS2_LOCAL_INFO_OFF);
 731	oinfo->dqi_flags = le32_to_cpu(ldinfo->dqi_flags);
 732	oinfo->dqi_chunks = le32_to_cpu(ldinfo->dqi_chunks);
 733	oinfo->dqi_blocks = le32_to_cpu(ldinfo->dqi_blocks);
 734	oinfo->dqi_libh = bh;
 735
 736	/* We crashed when using local quota file? */
 737	if (!(oinfo->dqi_flags & OLQF_CLEAN)) {
 738		rec = OCFS2_SB(sb)->quota_rec;
 739		if (!rec) {
 740			rec = ocfs2_alloc_quota_recovery();
 741			if (!rec) {
 742				status = -ENOMEM;
 743				mlog_errno(status);
 744				goto out_err;
 745			}
 746			OCFS2_SB(sb)->quota_rec = rec;
 747		}
 748
 749		status = ocfs2_recovery_load_quota(lqinode, ldinfo, type,
 750                                                   &rec->r_list[type]);
 751		if (status < 0) {
 752			mlog_errno(status);
 753			goto out_err;
 754		}
 755	}
 756
 757	status = ocfs2_load_local_quota_bitmaps(lqinode,
 758						ldinfo,
 759						&oinfo->dqi_chunk);
 760	if (status < 0) {
 761		mlog_errno(status);
 762		goto out_err;
 763	}
 764
 765	/* Now mark quota file as used */
 766	oinfo->dqi_flags &= ~OLQF_CLEAN;
 767	status = ocfs2_modify_bh(lqinode, bh, olq_update_info, info);
 768	if (status < 0) {
 769		mlog_errno(status);
 770		goto out_err;
 771	}
 772
 773	return 0;
 774out_err:
 775	if (oinfo) {
 776		iput(oinfo->dqi_gqinode);
 777		ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 778		ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 779		brelse(oinfo->dqi_lqi_bh);
 780		if (locked)
 781			ocfs2_inode_unlock(lqinode, 1);
 782		ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 783		if (global_read)
 784			cancel_delayed_work_sync(&oinfo->dqi_sync_work);
 785		kfree(oinfo);
 786	}
 787	brelse(bh);
 788	return status;
 789}
 790
 791/* Write local info to quota file */
 792static int ocfs2_local_write_info(struct super_block *sb, int type)
 793{
 794	struct mem_dqinfo *info = sb_dqinfo(sb, type);
 795	struct buffer_head *bh = ((struct ocfs2_mem_dqinfo *)info->dqi_priv)
 796						->dqi_libh;
 797	int status;
 798
 799	status = ocfs2_modify_bh(sb_dqopt(sb)->files[type], bh, olq_update_info,
 800				 info);
 801	if (status < 0) {
 802		mlog_errno(status);
 803		return -1;
 804	}
 805
 806	return 0;
 807}
 808
 809/* Release info from memory */
 810static int ocfs2_local_free_info(struct super_block *sb, int type)
 811{
 812	struct mem_dqinfo *info = sb_dqinfo(sb, type);
 813	struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 814	struct ocfs2_quota_chunk *chunk;
 815	struct ocfs2_local_disk_chunk *dchunk;
 816	int mark_clean = 1, len;
 817	int status = 0;
 818
 819	iput(oinfo->dqi_gqinode);
 820	ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock);
 821	ocfs2_lock_res_free(&oinfo->dqi_gqlock);
 822	list_for_each_entry(chunk, &oinfo->dqi_chunk, qc_chunk) {
 823		dchunk = (struct ocfs2_local_disk_chunk *)
 824					(chunk->qc_headerbh->b_data);
 825		if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 826			len = ol_chunk_entries(sb);
 827		} else {
 828			len = (oinfo->dqi_blocks -
 829			       ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 830			      * ol_quota_entries_per_block(sb);
 831		}
 832		/* Not all entries free? Bug! */
 833		if (le32_to_cpu(dchunk->dqc_free) != len) {
 834			mlog(ML_ERROR, "releasing quota file with used "
 835					"entries (type=%d)\n", type);
 836			mark_clean = 0;
 837		}
 838	}
 839	ocfs2_release_local_quota_bitmaps(&oinfo->dqi_chunk);
 840
 841	/*
 842	 * ocfs2_dismount_volume() has already aborted quota recovery...
 843	 */
 844	if (oinfo->dqi_rec) {
 845		ocfs2_free_quota_recovery(oinfo->dqi_rec);
 846		mark_clean = 0;
 847	}
 848
 849	if (!mark_clean)
 850		goto out;
 851
 852	/* Mark local file as clean */
 853	oinfo->dqi_flags |= OLQF_CLEAN;
 854	status = ocfs2_modify_bh(sb_dqopt(sb)->files[type],
 855				 oinfo->dqi_libh,
 856				 olq_update_info,
 857				 info);
 858	if (status < 0)
 859		mlog_errno(status);
 860out:
 861	ocfs2_inode_unlock(sb_dqopt(sb)->files[type], 1);
 862	brelse(oinfo->dqi_libh);
 863	brelse(oinfo->dqi_lqi_bh);
 864	kfree(oinfo);
 865	info->dqi_priv = NULL;
 866	return status;
 867}
 868
 869static void olq_set_dquot(struct buffer_head *bh, void *private)
 870{
 871	struct ocfs2_dquot *od = private;
 872	struct ocfs2_local_disk_dqblk *dqblk;
 873	struct super_block *sb = od->dq_dquot.dq_sb;
 874
 875	dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
 876		+ ol_dqblk_block_offset(sb, od->dq_local_off));
 877
 878	dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
 879					      od->dq_dquot.dq_id));
 880	spin_lock(&od->dq_dquot.dq_dqb_lock);
 881	dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
 882					  od->dq_origspace);
 883	dqblk->dqb_inodemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curinodes -
 884					  od->dq_originodes);
 885	spin_unlock(&od->dq_dquot.dq_dqb_lock);
 886	trace_olq_set_dquot(
 887		(unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
 888		(unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
 889		from_kqid(&init_user_ns, od->dq_dquot.dq_id));
 890}
 891
 892/* Write dquot to local quota file */
 893int ocfs2_local_write_dquot(struct dquot *dquot)
 894{
 895	struct super_block *sb = dquot->dq_sb;
 896	struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
 897	struct buffer_head *bh;
 898	struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
 899	int status;
 900
 901	status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
 902					     &bh);
 903	if (status) {
 904		mlog_errno(status);
 905		goto out;
 906	}
 907	status = ocfs2_modify_bh(lqinode, bh, olq_set_dquot, od);
 908	if (status < 0) {
 909		mlog_errno(status);
 910		goto out;
 911	}
 912out:
 913	brelse(bh);
 914	return status;
 915}
 916
 917/* Find free entry in local quota file */
 918static struct ocfs2_quota_chunk *ocfs2_find_free_entry(struct super_block *sb,
 919						       int type,
 920						       int *offset)
 921{
 922	struct mem_dqinfo *info = sb_dqinfo(sb, type);
 923	struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 924	struct ocfs2_quota_chunk *chunk = NULL, *iter;
 925	struct ocfs2_local_disk_chunk *dchunk;
 926	int found = 0, len;
 927
 928	list_for_each_entry(iter, &oinfo->dqi_chunk, qc_chunk) {
 929		dchunk = (struct ocfs2_local_disk_chunk *)
 930						iter->qc_headerbh->b_data;
 931		if (le32_to_cpu(dchunk->dqc_free) > 0) {
 932			chunk = iter;
 933			break;
 934		}
 935	}
 936	if (!chunk)
 937		return NULL;
 938
 939	if (chunk->qc_num < oinfo->dqi_chunks - 1) {
 940		len = ol_chunk_entries(sb);
 941	} else {
 942		len = (oinfo->dqi_blocks -
 943		       ol_quota_chunk_block(sb, chunk->qc_num) - 1)
 944		      * ol_quota_entries_per_block(sb);
 945	}
 946
 947	found = ocfs2_find_next_zero_bit_unaligned(dchunk->dqc_bitmap, len, 0);
 948	/* We failed? */
 949	if (found == len) {
 950		mlog(ML_ERROR, "Did not find empty entry in chunk %d with %u"
 951		     " entries free (type=%d)\n", chunk->qc_num,
 952		     le32_to_cpu(dchunk->dqc_free), type);
 953		return ERR_PTR(-EIO);
 954	}
 955	*offset = found;
 956	return chunk;
 957}
 958
 959/* Add new chunk to the local quota file */
 960static struct ocfs2_quota_chunk *ocfs2_local_quota_add_chunk(
 961							struct super_block *sb,
 962							int type,
 963							int *offset)
 964{
 965	struct mem_dqinfo *info = sb_dqinfo(sb, type);
 966	struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
 967	struct inode *lqinode = sb_dqopt(sb)->files[type];
 968	struct ocfs2_quota_chunk *chunk = NULL;
 969	struct ocfs2_local_disk_chunk *dchunk;
 970	int status;
 971	handle_t *handle;
 972	struct buffer_head *bh = NULL, *dbh = NULL;
 973	u64 p_blkno;
 974
 975	/* We are protected by dqio_sem so no locking needed */
 976	status = ocfs2_extend_no_holes(lqinode, NULL,
 977				       i_size_read(lqinode) + 2 * sb->s_blocksize,
 978				       i_size_read(lqinode));
 979	if (status < 0) {
 980		mlog_errno(status);
 981		goto out;
 982	}
 983	status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
 984					  i_size_read(lqinode) + 2 * sb->s_blocksize);
 985	if (status < 0) {
 986		mlog_errno(status);
 987		goto out;
 988	}
 989
 990	chunk = kmem_cache_alloc(ocfs2_qf_chunk_cachep, GFP_NOFS);
 991	if (!chunk) {
 992		status = -ENOMEM;
 993		mlog_errno(status);
 994		goto out;
 995	}
 996	/* Local quota info and two new blocks we initialize */
 997	handle = ocfs2_start_trans(OCFS2_SB(sb),
 998			OCFS2_LOCAL_QINFO_WRITE_CREDITS +
 999			2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1000	if (IS_ERR(handle)) {
1001		status = PTR_ERR(handle);
1002		mlog_errno(status);
1003		goto out;
1004	}
1005
1006	/* Initialize chunk header */
1007	status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1008					     &p_blkno, NULL, NULL);
1009	if (status < 0) {
1010		mlog_errno(status);
1011		goto out_trans;
1012	}
1013	bh = sb_getblk(sb, p_blkno);
1014	if (!bh) {
1015		status = -ENOMEM;
1016		mlog_errno(status);
1017		goto out_trans;
1018	}
1019	dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1020	ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1021	status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1022					 OCFS2_JOURNAL_ACCESS_CREATE);
1023	if (status < 0) {
1024		mlog_errno(status);
1025		goto out_trans;
1026	}
1027	lock_buffer(bh);
1028	dchunk->dqc_free = cpu_to_le32(ol_quota_entries_per_block(sb));
1029	memset(dchunk->dqc_bitmap, 0,
1030	       sb->s_blocksize - sizeof(struct ocfs2_local_disk_chunk) -
1031	       OCFS2_QBLK_RESERVED_SPACE);
1032	unlock_buffer(bh);
1033	ocfs2_journal_dirty(handle, bh);
1034
1035	/* Initialize new block with structures */
1036	status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks + 1,
1037					     &p_blkno, NULL, NULL);
1038	if (status < 0) {
1039		mlog_errno(status);
1040		goto out_trans;
1041	}
1042	dbh = sb_getblk(sb, p_blkno);
1043	if (!dbh) {
1044		status = -ENOMEM;
1045		mlog_errno(status);
1046		goto out_trans;
1047	}
1048	ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), dbh);
1049	status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), dbh,
1050					 OCFS2_JOURNAL_ACCESS_CREATE);
1051	if (status < 0) {
1052		mlog_errno(status);
1053		goto out_trans;
1054	}
1055	lock_buffer(dbh);
1056	memset(dbh->b_data, 0, sb->s_blocksize - OCFS2_QBLK_RESERVED_SPACE);
1057	unlock_buffer(dbh);
1058	ocfs2_journal_dirty(handle, dbh);
1059
1060	/* Update local quotafile info */
1061	oinfo->dqi_blocks += 2;
1062	oinfo->dqi_chunks++;
1063	status = ocfs2_local_write_info(sb, type);
1064	if (status < 0) {
1065		mlog_errno(status);
1066		goto out_trans;
1067	}
1068	status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1069	if (status < 0) {
1070		mlog_errno(status);
1071		goto out;
1072	}
1073
1074	list_add_tail(&chunk->qc_chunk, &oinfo->dqi_chunk);
1075	chunk->qc_num = list_entry(chunk->qc_chunk.prev,
1076				   struct ocfs2_quota_chunk,
1077				   qc_chunk)->qc_num + 1;
1078	chunk->qc_headerbh = bh;
1079	*offset = 0;
1080	return chunk;
1081out_trans:
1082	ocfs2_commit_trans(OCFS2_SB(sb), handle);
1083out:
1084	brelse(bh);
1085	brelse(dbh);
1086	kmem_cache_free(ocfs2_qf_chunk_cachep, chunk);
1087	return ERR_PTR(status);
1088}
1089
1090/* Find free entry in local quota file */
1091static struct ocfs2_quota_chunk *ocfs2_extend_local_quota_file(
1092						       struct super_block *sb,
1093						       int type,
1094						       int *offset)
1095{
1096	struct mem_dqinfo *info = sb_dqinfo(sb, type);
1097	struct ocfs2_mem_dqinfo *oinfo = info->dqi_priv;
1098	struct ocfs2_quota_chunk *chunk;
1099	struct inode *lqinode = sb_dqopt(sb)->files[type];
1100	struct ocfs2_local_disk_chunk *dchunk;
1101	int epb = ol_quota_entries_per_block(sb);
1102	unsigned int chunk_blocks;
1103	struct buffer_head *bh;
1104	u64 p_blkno;
1105	int status;
1106	handle_t *handle;
1107
1108	if (list_empty(&oinfo->dqi_chunk))
1109		return ocfs2_local_quota_add_chunk(sb, type, offset);
1110	/* Is the last chunk full? */
1111	chunk = list_entry(oinfo->dqi_chunk.prev,
1112			struct ocfs2_quota_chunk, qc_chunk);
1113	chunk_blocks = oinfo->dqi_blocks -
1114			ol_quota_chunk_block(sb, chunk->qc_num) - 1;
1115	if (ol_chunk_blocks(sb) == chunk_blocks)
1116		return ocfs2_local_quota_add_chunk(sb, type, offset);
1117
1118	/* We are protected by dqio_sem so no locking needed */
1119	status = ocfs2_extend_no_holes(lqinode, NULL,
1120				       i_size_read(lqinode) + sb->s_blocksize,
1121				       i_size_read(lqinode));
1122	if (status < 0) {
1123		mlog_errno(status);
1124		goto out;
1125	}
1126	status = ocfs2_simple_size_update(lqinode, oinfo->dqi_lqi_bh,
1127					  i_size_read(lqinode) + sb->s_blocksize);
1128	if (status < 0) {
1129		mlog_errno(status);
1130		goto out;
1131	}
1132
1133	/* Get buffer from the just added block */
1134	status = ocfs2_extent_map_get_blocks(lqinode, oinfo->dqi_blocks,
1135					     &p_blkno, NULL, NULL);
1136	if (status < 0) {
1137		mlog_errno(status);
1138		goto out;
1139	}
1140	bh = sb_getblk(sb, p_blkno);
1141	if (!bh) {
1142		status = -ENOMEM;
1143		mlog_errno(status);
1144		goto out;
1145	}
1146	ocfs2_set_new_buffer_uptodate(INODE_CACHE(lqinode), bh);
1147
1148	/* Local quota info, chunk header and the new block we initialize */
1149	handle = ocfs2_start_trans(OCFS2_SB(sb),
1150			OCFS2_LOCAL_QINFO_WRITE_CREDITS +
1151			2 * OCFS2_QUOTA_BLOCK_UPDATE_CREDITS);
1152	if (IS_ERR(handle)) {
1153		status = PTR_ERR(handle);
1154		mlog_errno(status);
1155		goto out;
1156	}
1157	/* Zero created block */
1158	status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode), bh,
1159				 OCFS2_JOURNAL_ACCESS_CREATE);
1160	if (status < 0) {
1161		mlog_errno(status);
1162		goto out_trans;
1163	}
1164	lock_buffer(bh);
1165	memset(bh->b_data, 0, sb->s_blocksize);
1166	unlock_buffer(bh);
1167	ocfs2_journal_dirty(handle, bh);
1168
1169	/* Update chunk header */
1170	status = ocfs2_journal_access_dq(handle, INODE_CACHE(lqinode),
1171					 chunk->qc_headerbh,
1172				 OCFS2_JOURNAL_ACCESS_WRITE);
1173	if (status < 0) {
1174		mlog_errno(status);
1175		goto out_trans;
1176	}
1177
1178	dchunk = (struct ocfs2_local_disk_chunk *)chunk->qc_headerbh->b_data;
1179	lock_buffer(chunk->qc_headerbh);
1180	le32_add_cpu(&dchunk->dqc_free, ol_quota_entries_per_block(sb));
1181	unlock_buffer(chunk->qc_headerbh);
1182	ocfs2_journal_dirty(handle, chunk->qc_headerbh);
1183
1184	/* Update file header */
1185	oinfo->dqi_blocks++;
1186	status = ocfs2_local_write_info(sb, type);
1187	if (status < 0) {
1188		mlog_errno(status);
1189		goto out_trans;
1190	}
1191
1192	status = ocfs2_commit_trans(OCFS2_SB(sb), handle);
1193	if (status < 0) {
1194		mlog_errno(status);
1195		goto out;
1196	}
1197	*offset = chunk_blocks * epb;
1198	return chunk;
1199out_trans:
1200	ocfs2_commit_trans(OCFS2_SB(sb), handle);
1201out:
1202	return ERR_PTR(status);
1203}
1204
1205static void olq_alloc_dquot(struct buffer_head *bh, void *private)
1206{
1207	int *offset = private;
1208	struct ocfs2_local_disk_chunk *dchunk;
1209
1210	dchunk = (struct ocfs2_local_disk_chunk *)bh->b_data;
1211	ocfs2_set_bit_unaligned(*offset, dchunk->dqc_bitmap);
1212	le32_add_cpu(&dchunk->dqc_free, -1);
1213}
1214
1215/* Create dquot in the local file for given id */
1216int ocfs2_create_local_dquot(struct dquot *dquot)
1217{
1218	struct super_block *sb = dquot->dq_sb;
1219	int type = dquot->dq_id.type;
1220	struct inode *lqinode = sb_dqopt(sb)->files[type];
1221	struct ocfs2_quota_chunk *chunk;
1222	struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1223	int offset;
1224	int status;
1225	u64 pcount;
1226
1227	down_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1228	chunk = ocfs2_find_free_entry(sb, type, &offset);
1229	if (!chunk) {
1230		chunk = ocfs2_extend_local_quota_file(sb, type, &offset);
1231		if (IS_ERR(chunk)) {
1232			status = PTR_ERR(chunk);
1233			goto out;
1234		}
1235	} else if (IS_ERR(chunk)) {
1236		status = PTR_ERR(chunk);
1237		goto out;
1238	}
1239	od->dq_local_off = ol_dqblk_off(sb, chunk->qc_num, offset);
1240	od->dq_chunk = chunk;
1241	status = ocfs2_extent_map_get_blocks(lqinode,
1242				     ol_dqblk_block(sb, chunk->qc_num, offset),
1243				     &od->dq_local_phys_blk,
1244				     &pcount,
1245				     NULL);
1246	if (status < 0) {
1247		mlog_errno(status);
1248		goto out;
1249	}
1250
1251	/* Initialize dquot structure on disk */
1252	status = ocfs2_local_write_dquot(dquot);
1253	if (status < 0) {
1254		mlog_errno(status);
1255		goto out;
1256	}
1257
1258	/* Mark structure as allocated */
1259	status = ocfs2_modify_bh(lqinode, chunk->qc_headerbh, olq_alloc_dquot,
1260				 &offset);
1261	if (status < 0) {
1262		mlog_errno(status);
1263		goto out;
1264	}
1265out:
1266	up_write(&OCFS2_I(lqinode)->ip_alloc_sem);
1267	return status;
1268}
1269
1270/*
1271 * Release dquot structure from local quota file. ocfs2_release_dquot() has
1272 * already started a transaction and written all changes to global quota file
1273 */
1274int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
1275{
1276	int status;
1277	int type = dquot->dq_id.type;
1278	struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
1279	struct super_block *sb = dquot->dq_sb;
1280	struct ocfs2_local_disk_chunk *dchunk;
1281	int offset;
1282
1283	status = ocfs2_journal_access_dq(handle,
1284			INODE_CACHE(sb_dqopt(sb)->files[type]),
1285			od->dq_chunk->qc_headerbh, OCFS2_JOURNAL_ACCESS_WRITE);
1286	if (status < 0) {
1287		mlog_errno(status);
1288		goto out;
1289	}
1290	offset = ol_dqblk_chunk_off(sb, od->dq_chunk->qc_num,
1291					     od->dq_local_off);
1292	dchunk = (struct ocfs2_local_disk_chunk *)
1293			(od->dq_chunk->qc_headerbh->b_data);
1294	/* Mark structure as freed */
1295	lock_buffer(od->dq_chunk->qc_headerbh);
1296	ocfs2_clear_bit_unaligned(offset, dchunk->dqc_bitmap);
1297	le32_add_cpu(&dchunk->dqc_free, 1);
1298	unlock_buffer(od->dq_chunk->qc_headerbh);
1299	ocfs2_journal_dirty(handle, od->dq_chunk->qc_headerbh);
1300
1301out:
1302	return status;
1303}
1304
1305static const struct quota_format_ops ocfs2_format_ops = {
1306	.check_quota_file	= ocfs2_local_check_quota_file,
1307	.read_file_info		= ocfs2_local_read_info,
1308	.write_file_info	= ocfs2_global_write_info,
1309	.free_file_info		= ocfs2_local_free_info,
1310};
1311
1312struct quota_format_type ocfs2_quota_format = {
1313	.qf_fmt_id = QFMT_OCFS2,
1314	.qf_ops = &ocfs2_format_ops,
1315	.qf_owner = THIS_MODULE
1316};