patch-2.4.25 linux-2.4.25/fs/xfs/quota/xfs_qm.h

• Lines: 230
• Date: 2004-02-18 05:36:32.000000000 -0800
• Orig file: linux-2.4.24/fs/xfs/quota/xfs_qm.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/fs/xfs/quota/xfs_qm.h linux-2.4.25/fs/xfs/quota/xfs_qm.h
@@ -0,0 +1,229 @@
+/*
+ * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 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.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.	 Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_QM_H__
+#define __XFS_QM_H__
+
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
+#include "xfs_quota_priv.h"
+#include "xfs_qm_stats.h"
+
+struct xfs_qm;
+struct xfs_inode;
+
+extern mutex_t		xfs_Gqm_lock;
+extern struct xfs_qm	*xfs_Gqm;
+extern kmem_zone_t	*qm_dqzone;
+extern kmem_zone_t	*qm_dqtrxzone;
+
+/*
+ * Used in xfs_qm_sync called by xfs_sync to count the max times that it can
+ * iterate over the mountpt's dquot list in one call.
+ */
+#define XFS_QM_SYNC_MAX_RESTARTS	7
+
+/*
+ * Ditto, for xfs_qm_dqreclaim_one.
+ */
+#define XFS_QM_RECLAIM_MAX_RESTARTS	4
+
+/*
+ * Ideal ratio of free to in use dquots. Quota manager makes an attempt
+ * to keep this balance.
+ */
+#define XFS_QM_DQFREE_RATIO		2
+
+/*
+ * Dquot hashtable constants/threshold values.
+ */
+#define XFS_QM_NCSIZE_THRESHOLD		5000
+#define XFS_QM_HASHSIZE_LOW		32
+#define XFS_QM_HASHSIZE_HIGH		64
+
+/*
+ * We output a cmn_err when quotachecking a quota file with more than
+ * this many fsbs.
+ */
+#define XFS_QM_BIG_QCHECK_NBLKS		500
+
+/*
+ * This defines the unit of allocation of dquots.
+ * Currently, it is just one file system block, and a 4K blk contains 30
+ * (136 * 30 = 4080) dquots. It's probably not worth trying to make
+ * this more dynamic.
+ * XXXsup However, if this number is changed, we have to make sure that we don't
+ * implicitly assume that we do allocations in chunks of a single filesystem
+ * block in the dquot/xqm code.
+ */
+#define XFS_DQUOT_CLUSTER_SIZE_FSB	(xfs_filblks_t)1
+/*
+ * When doing a quotacheck, we log dquot clusters of this many FSBs at most
+ * in a single transaction. We don't want to ask for too huge a log reservation.
+ */
+#define XFS_QM_MAX_DQCLUSTER_LOGSZ	3
+
+typedef xfs_dqhash_t	xfs_dqlist_t;
+/*
+ * The freelist head. The first two fields match the first two in the
+ * xfs_dquot_t structure (in xfs_dqmarker_t)
+ */
+typedef struct xfs_frlist {
+       struct xfs_dquot *qh_next;
+       struct xfs_dquot *qh_prev;
+       mutex_t		 qh_lock;
+       uint		 qh_version;
+       uint		 qh_nelems;
+} xfs_frlist_t;
+
+/*
+ * Quota Manager (global) structure. Lives only in core.
+ */
+typedef struct xfs_qm {
+	xfs_dqlist_t	*qm_usr_dqhtable;/* udquot hash table */
+	xfs_dqlist_t	*qm_grp_dqhtable;/* gdquot hash table */
+	uint		 qm_dqhashmask;	 /* # buckets in dq hashtab - 1 */
+	xfs_frlist_t	 qm_dqfreelist;	 /* freelist of dquots */
+	atomic_t	 qm_totaldquots; /* total incore dquots */
+	uint		 qm_nrefs;	 /* file systems with quota on */
+	int		 qm_dqfree_ratio;/* ratio of free to inuse dquots */
+	kmem_zone_t	*qm_dqzone;	 /* dquot mem-alloc zone */
+	kmem_zone_t	*qm_dqtrxzone;	 /* t_dqinfo of transactions */
+} xfs_qm_t;
+
+/*
+ * Various quota information for individual filesystems.
+ * The mount structure keeps a pointer to this.
+ */
+typedef struct xfs_quotainfo {
+	xfs_inode_t	*qi_uquotaip;	 /* user quota inode */
+	xfs_inode_t	*qi_gquotaip;	 /* group quota inode */
+	lock_t		 qi_pinlock;	 /* dquot pinning mutex */
+	xfs_dqlist_t	 qi_dqlist;	 /* all dquots in filesys */
+	int		 qi_dqreclaims;	 /* a change here indicates
+					    a removal in the dqlist */
+	time_t		 qi_btimelimit;	 /* limit for blks timer */
+	time_t		 qi_itimelimit;	 /* limit for inodes timer */
+	time_t		 qi_rtbtimelimit;/* limit for rt blks timer */
+	xfs_qwarncnt_t	 qi_bwarnlimit;	 /* limit for num warnings */
+	xfs_qwarncnt_t	 qi_iwarnlimit;	 /* limit for num warnings */
+	mutex_t		 qi_quotaofflock;/* to serialize quotaoff */
+	/* Some useful precalculated constants */
+	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */
+	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */
+} xfs_quotainfo_t;
+
+
+extern xfs_dqtrxops_t	xfs_trans_dquot_ops;
+
+extern void	xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
+extern int	xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
+			xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
+extern void	xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
+extern void	xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
+
+/*
+ * We keep the usr and grp dquots separately so that locking will be easier
+ * to do at commit time. All transactions that we know of at this point
+ * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
+ */
+#define XFS_QM_TRANS_MAXDQS		2
+typedef struct xfs_dquot_acct {
+	xfs_dqtrx_t	dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
+	xfs_dqtrx_t	dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
+} xfs_dquot_acct_t;
+
+/*
+ * Users are allowed to have a usage exceeding their softlimit for
+ * a period this long.
+ */
+#define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
+#define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
+#define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */
+
+#define XFS_QM_BWARNLIMIT	5
+#define XFS_QM_IWARNLIMIT	5
+
+#define XFS_QM_LOCK(xqm)	(mutex_lock(&xqm##_lock, PINOD))
+#define XFS_QM_UNLOCK(xqm)	(mutex_unlock(&xqm##_lock))
+#define XFS_QM_HOLD(xqm)	((xqm)->qm_nrefs++)
+#define XFS_QM_RELE(xqm)	((xqm)->qm_nrefs--)
+
+extern int		xfs_qm_init_quotainfo(xfs_mount_t *);
+extern void		xfs_qm_destroy_quotainfo(xfs_mount_t *);
+extern int		xfs_qm_mount_quotas(xfs_mount_t *);
+extern void		xfs_qm_mount_quotainit(xfs_mount_t *, uint);
+extern void		xfs_qm_unmount_quotadestroy(xfs_mount_t *);
+extern int		xfs_qm_unmount_quotas(xfs_mount_t *);
+extern int		xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
+extern int		xfs_qm_sync(xfs_mount_t *, short);
+
+/* dquot stuff */
+extern void		xfs_qm_dqunlink(xfs_dquot_t *);
+extern boolean_t	xfs_qm_dqalloc_incore(xfs_dquot_t **);
+extern int		xfs_qm_dqattach(xfs_inode_t *, uint);
+extern void		xfs_qm_dqdetach(xfs_inode_t *);
+extern int		xfs_qm_dqpurge_all(xfs_mount_t *, uint);
+extern void		xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
+
+/* vop stuff */
+extern int		xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
+					uid_t, gid_t, uint,
+					xfs_dquot_t **, xfs_dquot_t **);
+extern void		xfs_qm_vop_dqattach_and_dqmod_newinode(
+					xfs_trans_t *, xfs_inode_t *,
+					xfs_dquot_t *, xfs_dquot_t *);
+extern int		xfs_qm_vop_rename_dqattach(xfs_inode_t **);
+extern xfs_dquot_t *	xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
+					xfs_dquot_t **, xfs_dquot_t *);
+extern int		xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
+					xfs_dquot_t *, xfs_dquot_t *, uint);
+
+/* list stuff */
+extern void		xfs_qm_freelist_init(xfs_frlist_t *);
+extern void		xfs_qm_freelist_destroy(xfs_frlist_t *);
+extern void		xfs_qm_freelist_insert(xfs_frlist_t *, xfs_dquot_t *);
+extern void		xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
+extern void		xfs_qm_freelist_unlink(xfs_dquot_t *);
+extern int		xfs_qm_freelist_lock_nowait(xfs_qm_t *);
+extern int		xfs_qm_mplist_nowait(xfs_mount_t *);
+extern int		xfs_qm_dqhashlock_nowait(xfs_dquot_t *);
+
+/* system call interface */
+extern int		xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);
+
+#ifdef DEBUG
+extern int		xfs_qm_internalqcheck(xfs_mount_t *);
+#else
+#define xfs_qm_internalqcheck(mp)	(0)
+#endif
+
+#endif /* __XFS_QM_H__ */