xfs: remove the per-filesystem list of dquots
[deliverable/linux.git] / fs / xfs / xfs_qm.h
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1da177e4 1/*
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2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
1da177e4 4 *
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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
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7 * published by the Free Software Foundation.
8 *
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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.
1da177e4 13 *
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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
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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"
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24
25struct xfs_qm;
26struct xfs_inode;
27
a0b0b8a5 28extern struct mutex xfs_Gqm_lock;
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29extern struct xfs_qm *xfs_Gqm;
30extern kmem_zone_t *qm_dqzone;
31extern kmem_zone_t *qm_dqtrxzone;
32
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33/*
34 * This defines the unit of allocation of dquots.
35 * Currently, it is just one file system block, and a 4K blk contains 30
36 * (136 * 30 = 4080) dquots. It's probably not worth trying to make
37 * this more dynamic.
38 * XXXsup However, if this number is changed, we have to make sure that we don't
39 * implicitly assume that we do allocations in chunks of a single filesystem
40 * block in the dquot/xqm code.
41 */
42#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
1da177e4 43
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44/*
45 * Quota Manager (global) structure. Lives only in core.
46 */
47typedef struct xfs_qm {
1da177e4 48 uint qm_nrefs; /* file systems with quota on */
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49 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */
50 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */
51} xfs_qm_t;
52
53/*
54 * Various quota information for individual filesystems.
55 * The mount structure keeps a pointer to this.
56 */
57typedef struct xfs_quotainfo {
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58 struct radix_tree_root qi_uquota_tree;
59 struct radix_tree_root qi_gquota_tree;
60 struct mutex qi_tree_lock;
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61 xfs_inode_t *qi_uquotaip; /* user quota inode */
62 xfs_inode_t *qi_gquotaip; /* group quota inode */
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63 struct list_head qi_lru_list;
64 struct mutex qi_lru_lock;
65 int qi_lru_count;
3a25404b 66 int qi_dquots;
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67 time_t qi_btimelimit; /* limit for blks timer */
68 time_t qi_itimelimit; /* limit for inodes timer */
69 time_t qi_rtbtimelimit;/* limit for rt blks timer */
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70 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
71 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
72 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
a0b0b8a5 73 struct mutex qi_quotaofflock;/* to serialize quotaoff */
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74 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
75 uint qi_dqperchunk; /* # ondisk dqs in above chunk */
76 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */
77 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */
78 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */
79 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */
80 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */
81 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */
f8739c3c 82 struct shrinker qi_shrinker;
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83} xfs_quotainfo_t;
84
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85#define XFS_DQUOT_TREE(qi, type) \
86 ((type & XFS_DQ_USER) ? \
87 &((qi)->qi_uquota_tree) : \
88 &((qi)->qi_gquota_tree))
89
1da177e4 90
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91extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
92extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
93 xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
94extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
95extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
96
97/*
98 * We keep the usr and grp dquots separately so that locking will be easier
99 * to do at commit time. All transactions that we know of at this point
100 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
101 */
102#define XFS_QM_TRANS_MAXDQS 2
103typedef struct xfs_dquot_acct {
104 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
105 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
106} xfs_dquot_acct_t;
107
108/*
109 * Users are allowed to have a usage exceeding their softlimit for
110 * a period this long.
111 */
112#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
113#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
114#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
115
116#define XFS_QM_BWARNLIMIT 5
117#define XFS_QM_IWARNLIMIT 5
06d10dd9 118#define XFS_QM_RTBWARNLIMIT 5
1da177e4 119
1da177e4 120extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
1da177e4 121extern int xfs_qm_quotacheck(xfs_mount_t *);
1da177e4 122extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
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123
124/* dquot stuff */
b84a3a96 125extern void xfs_qm_dqpurge_all(xfs_mount_t *, uint);
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126extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
127
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128/* quota ops */
129extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
130extern int xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
131 fs_disk_quota_t *);
132extern int xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
133 fs_disk_quota_t *);
134extern int xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
135extern int xfs_qm_scall_quotaon(xfs_mount_t *, uint);
136extern int xfs_qm_scall_quotaoff(xfs_mount_t *, uint);
137
1da177e4 138#endif /* __XFS_QM_H__ */
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