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diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
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+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#ifndef __XFS_DQUOT_H__
+#define __XFS_DQUOT_H__
+
+/*
+ * Dquots are structures that hold quota information about a user or a group,
+ * much like inodes are for files. In fact, dquots share many characteristics
+ * with inodes. However, dquots can also be a centralized resource, relative
+ * to a collection of inodes. In this respect, dquots share some characteristics
+ * of the superblock.
+ * XFS dquots exploit both those in its algorithms. They make every attempt
+ * to not be a bottleneck when quotas are on and have minimal impact, if any,
+ * when quotas are off.
+ */
+
+/*
+ * The hash chain headers (hash buckets)
+ */
+typedef struct xfs_dqhash {
+ struct list_head qh_list;
+ struct mutex qh_lock;
+ uint qh_version; /* ever increasing version */
+ uint qh_nelems; /* number of dquots on the list */
+} xfs_dqhash_t;
+
+struct xfs_mount;
+struct xfs_trans;
+
+/*
+ * The incore dquot structure
+ */
+typedef struct xfs_dquot {
+ uint dq_flags; /* various flags (XFS_DQ_*) */
+ struct list_head q_freelist; /* global free list of dquots */
+ struct list_head q_mplist; /* mount's list of dquots */
+ struct list_head q_hashlist; /* gloabl hash list of dquots */
+ xfs_dqhash_t *q_hash; /* the hashchain header */
+ struct xfs_mount*q_mount; /* filesystem this relates to */
+ struct xfs_trans*q_transp; /* trans this belongs to currently */
+ uint q_nrefs; /* # active refs from inodes */
+ xfs_daddr_t q_blkno; /* blkno of dquot buffer */
+ int q_bufoffset; /* off of dq in buffer (# dquots) */
+ xfs_fileoff_t q_fileoffset; /* offset in quotas file */
+
+ struct xfs_dquot*q_gdquot; /* group dquot, hint only */
+ xfs_disk_dquot_t q_core; /* actual usage & quotas */
+ xfs_dq_logitem_t q_logitem; /* dquot log item */
+ xfs_qcnt_t q_res_bcount; /* total regular nblks used+reserved */
+ xfs_qcnt_t q_res_icount; /* total inos allocd+reserved */
+ xfs_qcnt_t q_res_rtbcount;/* total realtime blks used+reserved */
+ struct mutex q_qlock; /* quota lock */
+ struct completion q_flush; /* flush completion queue */
+ atomic_t q_pincount; /* dquot pin count */
+ wait_queue_head_t q_pinwait; /* dquot pinning wait queue */
+} xfs_dquot_t;
+
+/*
+ * Lock hierarchy for q_qlock:
+ * XFS_QLOCK_NORMAL is the implicit default,
+ * XFS_QLOCK_NESTED is the dquot with the higher id in xfs_dqlock2
+ */
+enum {
+ XFS_QLOCK_NORMAL = 0,
+ XFS_QLOCK_NESTED,
+};
+
+#define XFS_DQHOLD(dqp) ((dqp)->q_nrefs++)
+
+/*
+ * Manage the q_flush completion queue embedded in the dquot. This completion
+ * queue synchronizes processes attempting to flush the in-core dquot back to
+ * disk.
+ */
+static inline void xfs_dqflock(xfs_dquot_t *dqp)
+{
+ wait_for_completion(&dqp->q_flush);
+}
+
+static inline int xfs_dqflock_nowait(xfs_dquot_t *dqp)
+{
+ return try_wait_for_completion(&dqp->q_flush);
+}
+
+static inline void xfs_dqfunlock(xfs_dquot_t *dqp)
+{
+ complete(&dqp->q_flush);
+}
+
+#define XFS_DQ_IS_LOCKED(dqp) (mutex_is_locked(&((dqp)->q_qlock)))
+#define XFS_DQ_IS_DIRTY(dqp) ((dqp)->dq_flags & XFS_DQ_DIRTY)
+#define XFS_QM_ISUDQ(dqp) ((dqp)->dq_flags & XFS_DQ_USER)
+#define XFS_QM_ISPDQ(dqp) ((dqp)->dq_flags & XFS_DQ_PROJ)
+#define XFS_QM_ISGDQ(dqp) ((dqp)->dq_flags & XFS_DQ_GROUP)
+#define XFS_DQ_TO_QINF(dqp) ((dqp)->q_mount->m_quotainfo)
+#define XFS_DQ_TO_QIP(dqp) (XFS_QM_ISUDQ(dqp) ? \
+ XFS_DQ_TO_QINF(dqp)->qi_uquotaip : \
+ XFS_DQ_TO_QINF(dqp)->qi_gquotaip)
+
+#define XFS_IS_THIS_QUOTA_OFF(d) (! (XFS_QM_ISUDQ(d) ? \
+ (XFS_IS_UQUOTA_ON((d)->q_mount)) : \
+ (XFS_IS_OQUOTA_ON((d)->q_mount))))
+
+extern void xfs_qm_dqdestroy(xfs_dquot_t *);
+extern int xfs_qm_dqflush(xfs_dquot_t *, uint);
+extern int xfs_qm_dqpurge(xfs_dquot_t *);
+extern void xfs_qm_dqunpin_wait(xfs_dquot_t *);
+extern int xfs_qm_dqlock_nowait(xfs_dquot_t *);
+extern void xfs_qm_dqflock_pushbuf_wait(xfs_dquot_t *dqp);
+extern void xfs_qm_adjust_dqtimers(xfs_mount_t *,
+ xfs_disk_dquot_t *);
+extern void xfs_qm_adjust_dqlimits(xfs_mount_t *,
+ xfs_disk_dquot_t *);
+extern int xfs_qm_dqget(xfs_mount_t *, xfs_inode_t *,
+ xfs_dqid_t, uint, uint, xfs_dquot_t **);
+extern void xfs_qm_dqput(xfs_dquot_t *);
+extern void xfs_dqlock(xfs_dquot_t *);
+extern void xfs_dqlock2(xfs_dquot_t *, xfs_dquot_t *);
+extern void xfs_dqunlock(xfs_dquot_t *);
+extern void xfs_dqunlock_nonotify(xfs_dquot_t *);
+
+#endif /* __XFS_DQUOT_H__ */
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