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
|
/*
* 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_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 uint ndquot;
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_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t))
#define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t))
/*
* 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 */
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 blks warnings */
xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks 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_RTBWARNLIMIT 5
extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
extern void xfs_qm_mount_quotas(xfs_mount_t *);
extern int xfs_qm_quotacheck(xfs_mount_t *);
extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
extern void 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 *, int);
/* 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, prid_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 *);
/* system call interface */
extern int xfs_qm_quotactl(struct xfs_mount *, 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__ */
|
