ea15ab3cdd
Remove the dead hash table test rid which has been rotting away under QUOTADEBUG, including some code that was compiled for normal debug builds, but not actually called without QUOTADEBUG, and enable a few cheap debug checks that were hidden under QUOTADEBUG for normal debug builds. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Alex Elder <aelder@sgi.com> Reviewed-by: Dave Chinner <dchinner@redhat.com>
137 lines
4.9 KiB
C
137 lines
4.9 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_DQUOT_H__
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#define __XFS_DQUOT_H__
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/*
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* Dquots are structures that hold quota information about a user or a group,
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* much like inodes are for files. In fact, dquots share many characteristics
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* with inodes. However, dquots can also be a centralized resource, relative
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* to a collection of inodes. In this respect, dquots share some characteristics
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* of the superblock.
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* XFS dquots exploit both those in its algorithms. They make every attempt
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* to not be a bottleneck when quotas are on and have minimal impact, if any,
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* when quotas are off.
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*/
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/*
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* The hash chain headers (hash buckets)
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*/
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typedef struct xfs_dqhash {
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struct list_head qh_list;
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struct mutex qh_lock;
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uint qh_version; /* ever increasing version */
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uint qh_nelems; /* number of dquots on the list */
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} xfs_dqhash_t;
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struct xfs_mount;
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struct xfs_trans;
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/*
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* The incore dquot structure
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*/
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typedef struct xfs_dquot {
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uint dq_flags; /* various flags (XFS_DQ_*) */
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struct list_head q_freelist; /* global free list of dquots */
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struct list_head q_mplist; /* mount's list of dquots */
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struct list_head q_hashlist; /* gloabl hash list of dquots */
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xfs_dqhash_t *q_hash; /* the hashchain header */
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struct xfs_mount*q_mount; /* filesystem this relates to */
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struct xfs_trans*q_transp; /* trans this belongs to currently */
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uint q_nrefs; /* # active refs from inodes */
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xfs_daddr_t q_blkno; /* blkno of dquot buffer */
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int q_bufoffset; /* off of dq in buffer (# dquots) */
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xfs_fileoff_t q_fileoffset; /* offset in quotas file */
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struct xfs_dquot*q_gdquot; /* group dquot, hint only */
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xfs_disk_dquot_t q_core; /* actual usage & quotas */
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xfs_dq_logitem_t q_logitem; /* dquot log item */
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xfs_qcnt_t q_res_bcount; /* total regular nblks used+reserved */
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xfs_qcnt_t q_res_icount; /* total inos allocd+reserved */
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xfs_qcnt_t q_res_rtbcount;/* total realtime blks used+reserved */
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struct mutex q_qlock; /* quota lock */
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struct completion q_flush; /* flush completion queue */
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atomic_t q_pincount; /* dquot pin count */
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wait_queue_head_t q_pinwait; /* dquot pinning wait queue */
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} xfs_dquot_t;
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/*
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* Lock hierarchy for q_qlock:
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* XFS_QLOCK_NORMAL is the implicit default,
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* XFS_QLOCK_NESTED is the dquot with the higher id in xfs_dqlock2
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*/
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enum {
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XFS_QLOCK_NORMAL = 0,
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XFS_QLOCK_NESTED,
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};
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#define XFS_DQHOLD(dqp) ((dqp)->q_nrefs++)
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/*
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* Manage the q_flush completion queue embedded in the dquot. This completion
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* queue synchronizes processes attempting to flush the in-core dquot back to
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* disk.
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*/
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static inline void xfs_dqflock(xfs_dquot_t *dqp)
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{
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wait_for_completion(&dqp->q_flush);
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}
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static inline int xfs_dqflock_nowait(xfs_dquot_t *dqp)
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{
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return try_wait_for_completion(&dqp->q_flush);
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}
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static inline void xfs_dqfunlock(xfs_dquot_t *dqp)
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{
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complete(&dqp->q_flush);
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}
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#define XFS_DQ_IS_LOCKED(dqp) (mutex_is_locked(&((dqp)->q_qlock)))
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#define XFS_DQ_IS_DIRTY(dqp) ((dqp)->dq_flags & XFS_DQ_DIRTY)
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#define XFS_QM_ISUDQ(dqp) ((dqp)->dq_flags & XFS_DQ_USER)
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#define XFS_QM_ISPDQ(dqp) ((dqp)->dq_flags & XFS_DQ_PROJ)
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#define XFS_QM_ISGDQ(dqp) ((dqp)->dq_flags & XFS_DQ_GROUP)
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#define XFS_DQ_TO_QINF(dqp) ((dqp)->q_mount->m_quotainfo)
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#define XFS_DQ_TO_QIP(dqp) (XFS_QM_ISUDQ(dqp) ? \
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XFS_DQ_TO_QINF(dqp)->qi_uquotaip : \
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XFS_DQ_TO_QINF(dqp)->qi_gquotaip)
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#define XFS_IS_THIS_QUOTA_OFF(d) (! (XFS_QM_ISUDQ(d) ? \
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(XFS_IS_UQUOTA_ON((d)->q_mount)) : \
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(XFS_IS_OQUOTA_ON((d)->q_mount))))
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extern void xfs_qm_dqdestroy(xfs_dquot_t *);
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extern int xfs_qm_dqflush(xfs_dquot_t *, uint);
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extern int xfs_qm_dqpurge(xfs_dquot_t *);
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extern void xfs_qm_dqunpin_wait(xfs_dquot_t *);
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extern int xfs_qm_dqlock_nowait(xfs_dquot_t *);
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extern void xfs_qm_dqflock_pushbuf_wait(xfs_dquot_t *dqp);
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extern void xfs_qm_adjust_dqtimers(xfs_mount_t *,
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xfs_disk_dquot_t *);
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extern void xfs_qm_adjust_dqlimits(xfs_mount_t *,
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xfs_disk_dquot_t *);
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extern int xfs_qm_dqget(xfs_mount_t *, xfs_inode_t *,
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xfs_dqid_t, uint, uint, xfs_dquot_t **);
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extern void xfs_qm_dqput(xfs_dquot_t *);
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extern void xfs_dqlock(xfs_dquot_t *);
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extern void xfs_dqlock2(xfs_dquot_t *, xfs_dquot_t *);
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extern void xfs_dqunlock(xfs_dquot_t *);
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extern void xfs_dqunlock_nonotify(xfs_dquot_t *);
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#endif /* __XFS_DQUOT_H__ */
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