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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott4ce31212005-11-02 14:59:41 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott4ce31212005-11-02 14:59:41 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott4ce31212005-11-02 14:59:41 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott4ce31212005-11-02 14:59:41 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
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
Nathan Scott6b3f6b52005-11-02 15:08:25 +110029extern uint ndquot;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030extern mutex_t 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 */
Tim Shimmine6a4b372007-11-23 16:30:42 +110055#define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t))
56#define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t))
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 * 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/*
69 * When doing a quotacheck, we log dquot clusters of this many FSBs at most
70 * in a single transaction. We don't want to ask for too huge a log reservation.
71 */
72#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3
73
74typedef xfs_dqhash_t xfs_dqlist_t;
75/*
76 * The freelist head. The first two fields match the first two in the
77 * xfs_dquot_t structure (in xfs_dqmarker_t)
78 */
79typedef struct xfs_frlist {
80 struct xfs_dquot *qh_next;
81 struct xfs_dquot *qh_prev;
82 mutex_t qh_lock;
83 uint qh_version;
84 uint qh_nelems;
85} xfs_frlist_t;
86
87/*
88 * Quota Manager (global) structure. Lives only in core.
89 */
90typedef struct xfs_qm {
91 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */
92 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */
93 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */
94 xfs_frlist_t qm_dqfreelist; /* freelist of dquots */
95 atomic_t qm_totaldquots; /* total incore dquots */
96 uint qm_nrefs; /* file systems with quota on */
97 int qm_dqfree_ratio;/* ratio of free to inuse dquots */
98 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */
99 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */
100} xfs_qm_t;
101
102/*
103 * Various quota information for individual filesystems.
104 * The mount structure keeps a pointer to this.
105 */
106typedef struct xfs_quotainfo {
107 xfs_inode_t *qi_uquotaip; /* user quota inode */
108 xfs_inode_t *qi_gquotaip; /* group quota inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 xfs_dqlist_t qi_dqlist; /* all dquots in filesys */
110 int qi_dqreclaims; /* a change here indicates
111 a removal in the dqlist */
112 time_t qi_btimelimit; /* limit for blks timer */
113 time_t qi_itimelimit; /* limit for inodes timer */
114 time_t qi_rtbtimelimit;/* limit for rt blks timer */
Nathan Scott06d10dd2005-06-21 15:48:47 +1000115 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
116 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
117 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 mutex_t qi_quotaofflock;/* to serialize quotaoff */
119 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
120 uint qi_dqperchunk; /* # ondisk dqs in above chunk */
121 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */
122 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */
123 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */
124 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */
125 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */
126 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */
127} xfs_quotainfo_t;
128
129
130extern xfs_dqtrxops_t xfs_trans_dquot_ops;
131
132extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
133extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
134 xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
135extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
136extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
137
138/*
139 * We keep the usr and grp dquots separately so that locking will be easier
140 * to do at commit time. All transactions that we know of at this point
141 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
142 */
143#define XFS_QM_TRANS_MAXDQS 2
144typedef struct xfs_dquot_acct {
145 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
146 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
147} xfs_dquot_acct_t;
148
149/*
150 * Users are allowed to have a usage exceeding their softlimit for
151 * a period this long.
152 */
153#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
154#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
155#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
156
157#define XFS_QM_BWARNLIMIT 5
158#define XFS_QM_IWARNLIMIT 5
Nathan Scott06d10dd2005-06-21 15:48:47 +1000159#define XFS_QM_RTBWARNLIMIT 5
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Jes Sorensen794ee1b2006-01-09 15:59:21 -0800161#define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162#define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock))
163#define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++)
164#define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--)
165
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
Christoph Hellwig42490232008-08-13 16:49:32 +1000167extern void xfs_qm_mount_quotas(xfs_mount_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168extern int xfs_qm_quotacheck(xfs_mount_t *);
169extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
Christoph Hellwige57481d2008-12-03 12:20:36 +0100170extern void xfs_qm_unmount_quotas(xfs_mount_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
Christoph Hellwigb09cc772007-08-30 17:19:57 +1000172extern int xfs_qm_sync(xfs_mount_t *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
174/* dquot stuff */
175extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
176extern int xfs_qm_dqattach(xfs_inode_t *, uint);
177extern void xfs_qm_dqdetach(xfs_inode_t *);
178extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
179extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
180
181/* vop stuff */
182extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000183 uid_t, gid_t, prid_t, uint,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 xfs_dquot_t **, xfs_dquot_t **);
185extern void xfs_qm_vop_dqattach_and_dqmod_newinode(
186 xfs_trans_t *, xfs_inode_t *,
187 xfs_dquot_t *, xfs_dquot_t *);
188extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **);
189extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
190 xfs_dquot_t **, xfs_dquot_t *);
191extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
192 xfs_dquot_t *, xfs_dquot_t *, uint);
193
194/* list stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
196extern void xfs_qm_freelist_unlink(xfs_dquot_t *);
197extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
199/* system call interface */
Christoph Hellwigb09cc772007-08-30 17:19:57 +1000200extern int xfs_qm_quotactl(struct xfs_mount *, int, int,
201 xfs_caddr_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
203#ifdef DEBUG
204extern int xfs_qm_internalqcheck(xfs_mount_t *);
205#else
206#define xfs_qm_internalqcheck(mp) (0)
207#endif
208
209#endif /* __XFS_QM_H__ */