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1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#ifndef __XFS_QM_H__
19#define __XFS_QM_H__
20
21#include "xfs_dquot_item.h"
22#include "xfs_dquot.h"
23#include "xfs_quota_priv.h"
24#include "xfs_qm_stats.h"
25
26struct xfs_qm;
27struct xfs_inode;
28
29extern uint ndquot;
30extern struct mutex xfs_Gqm_lock;
31extern struct xfs_qm *xfs_Gqm;
32extern kmem_zone_t *qm_dqzone;
33extern kmem_zone_t *qm_dqtrxzone;
34
35/*
36 * Used in xfs_qm_sync called by xfs_sync to count the max times that it can
37 * iterate over the mountpt's dquot list in one call.
38 */
39#define XFS_QM_SYNC_MAX_RESTARTS 7
40
41/*
42 * Ditto, for xfs_qm_dqreclaim_one.
43 */
44#define XFS_QM_RECLAIM_MAX_RESTARTS 4
45
46/*
47 * Ideal ratio of free to in use dquots. Quota manager makes an attempt
48 * to keep this balance.
49 */
50#define XFS_QM_DQFREE_RATIO 2
51
52/*
53 * Dquot hashtable constants/threshold values.
54 */
55#define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t))
56#define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t))
57
58/*
59 * This defines the unit of allocation of dquots.
60 * Currently, it is just one file system block, and a 4K blk contains 30
61 * (136 * 30 = 4080) dquots. It's probably not worth trying to make
62 * this more dynamic.
63 * XXXsup However, if this number is changed, we have to make sure that we don't
64 * implicitly assume that we do allocations in chunks of a single filesystem
65 * block in the dquot/xqm code.
66 */
67#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
68
69typedef xfs_dqhash_t xfs_dqlist_t;
70
71/*
72 * Quota Manager (global) structure. Lives only in core.
73 */
74typedef struct xfs_qm {
75 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */
76 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */
77 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */
78 struct list_head qm_dqfrlist; /* freelist of dquots */
79 struct mutex qm_dqfrlist_lock;
80 int qm_dqfrlist_cnt;
81 atomic_t qm_totaldquots; /* total incore dquots */
82 uint qm_nrefs; /* file systems with quota on */
83 int qm_dqfree_ratio;/* ratio of free to inuse dquots */
84 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */
85 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */
86} xfs_qm_t;
87
88/*
89 * Various quota information for individual filesystems.
90 * The mount structure keeps a pointer to this.
91 */
92typedef struct xfs_quotainfo {
93 xfs_inode_t *qi_uquotaip; /* user quota inode */
94 xfs_inode_t *qi_gquotaip; /* group quota inode */
95 struct list_head qi_dqlist; /* all dquots in filesys */
96 struct mutex qi_dqlist_lock;
97 int qi_dquots;
98 int qi_dqreclaims; /* a change here indicates
99 a removal in the dqlist */
100 time_t qi_btimelimit; /* limit for blks timer */
101 time_t qi_itimelimit; /* limit for inodes timer */
102 time_t qi_rtbtimelimit;/* limit for rt blks timer */
103 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
104 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
105 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
106 struct mutex qi_quotaofflock;/* to serialize quotaoff */
107 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
108 uint qi_dqperchunk; /* # ondisk dqs in above chunk */
109 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */
110 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */
111 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */
112 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */
113 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */
114 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */
115} xfs_quotainfo_t;
116
117
118extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
119extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
120 xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
121extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
122extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
123
124/*
125 * We keep the usr and grp dquots separately so that locking will be easier
126 * to do at commit time. All transactions that we know of at this point
127 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
128 */
129#define XFS_QM_TRANS_MAXDQS 2
130typedef struct xfs_dquot_acct {
131 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
132 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
133} xfs_dquot_acct_t;
134
135/*
136 * Users are allowed to have a usage exceeding their softlimit for
137 * a period this long.
138 */
139#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
140#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
141#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
142
143#define XFS_QM_BWARNLIMIT 5
144#define XFS_QM_IWARNLIMIT 5
145#define XFS_QM_RTBWARNLIMIT 5
146
147extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
148extern int xfs_qm_quotacheck(xfs_mount_t *);
149extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
150
151/* dquot stuff */
152extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
153extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
154extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
155
156/* quota ops */
157extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
158extern int xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
159 fs_disk_quota_t *);
160extern int xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
161 fs_disk_quota_t *);
162extern int xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
163extern int xfs_qm_scall_quotaon(xfs_mount_t *, uint);
164extern int xfs_qm_scall_quotaoff(xfs_mount_t *, uint);
165
166#endif /* __XFS_QM_H__ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 10:03:18 -0500