2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "xfs_dquot_item.h"
22 #include "xfs_dquot.h"
23 #include "xfs_quota_priv.h"
24 #include "xfs_qm_stats.h"
30 extern struct mutex xfs_Gqm_lock
;
31 extern struct xfs_qm
*xfs_Gqm
;
32 extern kmem_zone_t
*qm_dqzone
;
33 extern kmem_zone_t
*qm_dqtrxzone
;
36 * Ditto, for xfs_qm_dqreclaim_one.
38 #define XFS_QM_RECLAIM_MAX_RESTARTS 4
41 * Ideal ratio of free to in use dquots. Quota manager makes an attempt
42 * to keep this balance.
44 #define XFS_QM_DQFREE_RATIO 2
47 * Dquot hashtable constants/threshold values.
49 #define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t))
50 #define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t))
53 * This defines the unit of allocation of dquots.
54 * Currently, it is just one file system block, and a 4K blk contains 30
55 * (136 * 30 = 4080) dquots. It's probably not worth trying to make
57 * XXXsup However, if this number is changed, we have to make sure that we don't
58 * implicitly assume that we do allocations in chunks of a single filesystem
59 * block in the dquot/xqm code.
61 #define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
63 typedef xfs_dqhash_t xfs_dqlist_t
;
66 * Quota Manager (global) structure. Lives only in core.
68 typedef struct xfs_qm
{
69 xfs_dqlist_t
*qm_usr_dqhtable
;/* udquot hash table */
70 xfs_dqlist_t
*qm_grp_dqhtable
;/* gdquot hash table */
71 uint qm_dqhashmask
; /* # buckets in dq hashtab - 1 */
72 struct list_head qm_dqfrlist
; /* freelist of dquots */
73 struct mutex qm_dqfrlist_lock
;
75 atomic_t qm_totaldquots
; /* total incore dquots */
76 uint qm_nrefs
; /* file systems with quota on */
77 int qm_dqfree_ratio
;/* ratio of free to inuse dquots */
78 kmem_zone_t
*qm_dqzone
; /* dquot mem-alloc zone */
79 kmem_zone_t
*qm_dqtrxzone
; /* t_dqinfo of transactions */
83 * Various quota information for individual filesystems.
84 * The mount structure keeps a pointer to this.
86 typedef struct xfs_quotainfo
{
87 xfs_inode_t
*qi_uquotaip
; /* user quota inode */
88 xfs_inode_t
*qi_gquotaip
; /* group quota inode */
89 struct list_head qi_dqlist
; /* all dquots in filesys */
90 struct mutex qi_dqlist_lock
;
92 int qi_dqreclaims
; /* a change here indicates
93 a removal in the dqlist */
94 time_t qi_btimelimit
; /* limit for blks timer */
95 time_t qi_itimelimit
; /* limit for inodes timer */
96 time_t qi_rtbtimelimit
;/* limit for rt blks timer */
97 xfs_qwarncnt_t qi_bwarnlimit
; /* limit for blks warnings */
98 xfs_qwarncnt_t qi_iwarnlimit
; /* limit for inodes warnings */
99 xfs_qwarncnt_t qi_rtbwarnlimit
;/* limit for rt blks warnings */
100 struct mutex qi_quotaofflock
;/* to serialize quotaoff */
101 xfs_filblks_t qi_dqchunklen
; /* # BBs in a chunk of dqs */
102 uint qi_dqperchunk
; /* # ondisk dqs in above chunk */
103 xfs_qcnt_t qi_bhardlimit
; /* default data blk hard limit */
104 xfs_qcnt_t qi_bsoftlimit
; /* default data blk soft limit */
105 xfs_qcnt_t qi_ihardlimit
; /* default inode count hard limit */
106 xfs_qcnt_t qi_isoftlimit
; /* default inode count soft limit */
107 xfs_qcnt_t qi_rtbhardlimit
;/* default realtime blk hard limit */
108 xfs_qcnt_t qi_rtbsoftlimit
;/* default realtime blk soft limit */
112 extern void xfs_trans_mod_dquot(xfs_trans_t
*, xfs_dquot_t
*, uint
, long);
113 extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t
*, xfs_mount_t
*,
114 xfs_dquot_t
*, xfs_dquot_t
*, long, long, uint
);
115 extern void xfs_trans_dqjoin(xfs_trans_t
*, xfs_dquot_t
*);
116 extern void xfs_trans_log_dquot(xfs_trans_t
*, xfs_dquot_t
*);
119 * We keep the usr and grp dquots separately so that locking will be easier
120 * to do at commit time. All transactions that we know of at this point
121 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
123 #define XFS_QM_TRANS_MAXDQS 2
124 typedef struct xfs_dquot_acct
{
125 xfs_dqtrx_t dqa_usrdquots
[XFS_QM_TRANS_MAXDQS
];
126 xfs_dqtrx_t dqa_grpdquots
[XFS_QM_TRANS_MAXDQS
];
130 * Users are allowed to have a usage exceeding their softlimit for
131 * a period this long.
133 #define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
134 #define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
135 #define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
137 #define XFS_QM_BWARNLIMIT 5
138 #define XFS_QM_IWARNLIMIT 5
139 #define XFS_QM_RTBWARNLIMIT 5
141 extern void xfs_qm_destroy_quotainfo(xfs_mount_t
*);
142 extern int xfs_qm_quotacheck(xfs_mount_t
*);
143 extern int xfs_qm_write_sb_changes(xfs_mount_t
*, __int64_t
);
146 extern boolean_t
xfs_qm_dqalloc_incore(xfs_dquot_t
**);
147 extern int xfs_qm_dqpurge_all(xfs_mount_t
*, uint
);
148 extern void xfs_qm_dqrele_all_inodes(xfs_mount_t
*, uint
);
151 extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t
*, uint
);
152 extern int xfs_qm_scall_getquota(xfs_mount_t
*, xfs_dqid_t
, uint
,
154 extern int xfs_qm_scall_setqlim(xfs_mount_t
*, xfs_dqid_t
, uint
,
156 extern int xfs_qm_scall_getqstat(xfs_mount_t
*, fs_quota_stat_t
*);
157 extern int xfs_qm_scall_quotaon(xfs_mount_t
*, uint
);
158 extern int xfs_qm_scall_quotaoff(xfs_mount_t
*, uint
);
160 #endif /* __XFS_QM_H__ */