aboutsummaryrefslogtreecommitdiff
path: root/fs/xfs/quota/xfs_qm.h
blob: ae626eca5acab1bf2c4f7be6a8ccacec95d213ac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
/*
 * Copyright (c) 2000-2004 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 */
	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */
	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */
	xfs_qcnt_t	 qi_bhardlimit;	 /* default data blk hard limit */
	xfs_qcnt_t	 qi_bsoftlimit;	 /* default data blk soft limit */
	xfs_qcnt_t	 qi_ihardlimit;	 /* default inode count hard limit */
	xfs_qcnt_t	 qi_isoftlimit;	 /* default inode count soft limit */
	xfs_qcnt_t	 qi_rtbhardlimit;/* default realtime blk hard limit */
	xfs_qcnt_t	 qi_rtbsoftlimit;/* default realtime blk soft limit */
} 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 void		xfs_mount_reset_sbqflags(xfs_mount_t *);

extern void		xfs_qm_destroy_quotainfo(xfs_mount_t *);
extern int		xfs_qm_mount_quotas(xfs_mount_t *, int);
extern void		xfs_qm_mount_quotainit(xfs_mount_t *, uint);
extern int		xfs_qm_quotacheck(xfs_mount_t *);
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 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_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 *);

/* 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__ */