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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 */
Nathan Scott6b3f6b52005-11-02 15:08:25 +110055#define XFS_QM_HASHSIZE_LOW (NBPP / sizeof(xfs_dqhash_t))
56#define XFS_QM_HASHSIZE_HIGH ((NBPP * 4) / sizeof(xfs_dqhash_t))
Linus Torvalds1da177e2005-04-16 15:20:36 -070057
58/*
59 * We output a cmn_err when quotachecking a quota file with more than
60 * this many fsbs.
61 */
62#define XFS_QM_BIG_QCHECK_NBLKS 500
63
64/*
65 * This defines the unit of allocation of dquots.
66 * Currently, it is just one file system block, and a 4K blk contains 30
67 * (136 * 30 = 4080) dquots. It's probably not worth trying to make
68 * this more dynamic.
69 * XXXsup However, if this number is changed, we have to make sure that we don't
70 * implicitly assume that we do allocations in chunks of a single filesystem
71 * block in the dquot/xqm code.
72 */
73#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
74/*
75 * When doing a quotacheck, we log dquot clusters of this many FSBs at most
76 * in a single transaction. We don't want to ask for too huge a log reservation.
77 */
78#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3
79
80typedef xfs_dqhash_t xfs_dqlist_t;
81/*
82 * The freelist head. The first two fields match the first two in the
83 * xfs_dquot_t structure (in xfs_dqmarker_t)
84 */
85typedef struct xfs_frlist {
86 struct xfs_dquot *qh_next;
87 struct xfs_dquot *qh_prev;
88 mutex_t qh_lock;
89 uint qh_version;
90 uint qh_nelems;
91} xfs_frlist_t;
92
93/*
94 * Quota Manager (global) structure. Lives only in core.
95 */
96typedef struct xfs_qm {
97 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */
98 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */
99 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */
100 xfs_frlist_t qm_dqfreelist; /* freelist of dquots */
101 atomic_t qm_totaldquots; /* total incore dquots */
102 uint qm_nrefs; /* file systems with quota on */
103 int qm_dqfree_ratio;/* ratio of free to inuse dquots */
104 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */
105 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */
106} xfs_qm_t;
107
108/*
109 * Various quota information for individual filesystems.
110 * The mount structure keeps a pointer to this.
111 */
112typedef struct xfs_quotainfo {
113 xfs_inode_t *qi_uquotaip; /* user quota inode */
114 xfs_inode_t *qi_gquotaip; /* group quota inode */
115 lock_t qi_pinlock; /* dquot pinning mutex */
116 xfs_dqlist_t qi_dqlist; /* all dquots in filesys */
117 int qi_dqreclaims; /* a change here indicates
118 a removal in the dqlist */
119 time_t qi_btimelimit; /* limit for blks timer */
120 time_t qi_itimelimit; /* limit for inodes timer */
121 time_t qi_rtbtimelimit;/* limit for rt blks timer */
Nathan Scott06d10dd2005-06-21 15:48:47 +1000122 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
123 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
124 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 mutex_t qi_quotaofflock;/* to serialize quotaoff */
126 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
127 uint qi_dqperchunk; /* # ondisk dqs in above chunk */
128 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */
129 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */
130 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */
131 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */
132 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */
133 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */
134} xfs_quotainfo_t;
135
136
137extern xfs_dqtrxops_t xfs_trans_dquot_ops;
138
139extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
140extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
141 xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
142extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
143extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
144
145/*
146 * We keep the usr and grp dquots separately so that locking will be easier
147 * to do at commit time. All transactions that we know of at this point
148 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
149 */
150#define XFS_QM_TRANS_MAXDQS 2
151typedef struct xfs_dquot_acct {
152 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
153 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
154} xfs_dquot_acct_t;
155
156/*
157 * Users are allowed to have a usage exceeding their softlimit for
158 * a period this long.
159 */
160#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
161#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
162#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
163
164#define XFS_QM_BWARNLIMIT 5
165#define XFS_QM_IWARNLIMIT 5
Nathan Scott06d10dd2005-06-21 15:48:47 +1000166#define XFS_QM_RTBWARNLIMIT 5
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
168#define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock, PINOD))
169#define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock))
170#define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++)
171#define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--)
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
174extern int xfs_qm_mount_quotas(xfs_mount_t *, int);
175extern void xfs_qm_mount_quotainit(xfs_mount_t *, uint);
176extern int xfs_qm_quotacheck(xfs_mount_t *);
177extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
178extern int xfs_qm_unmount_quotas(xfs_mount_t *);
179extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
180extern int xfs_qm_sync(xfs_mount_t *, short);
181
182/* dquot stuff */
183extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
184extern int xfs_qm_dqattach(xfs_inode_t *, uint);
185extern void xfs_qm_dqdetach(xfs_inode_t *);
186extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
187extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
188
189/* vop stuff */
190extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
Nathan Scottc8ad20f2005-06-21 15:38:48 +1000191 uid_t, gid_t, prid_t, uint,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 xfs_dquot_t **, xfs_dquot_t **);
193extern void xfs_qm_vop_dqattach_and_dqmod_newinode(
194 xfs_trans_t *, xfs_inode_t *,
195 xfs_dquot_t *, xfs_dquot_t *);
196extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **);
197extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
198 xfs_dquot_t **, xfs_dquot_t *);
199extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
200 xfs_dquot_t *, xfs_dquot_t *, uint);
201
202/* list stuff */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
204extern void xfs_qm_freelist_unlink(xfs_dquot_t *);
205extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206
207/* system call interface */
208extern int xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);
209
210#ifdef DEBUG
211extern int xfs_qm_internalqcheck(xfs_mount_t *);
212#else
213#define xfs_qm_internalqcheck(mp) (0)
214#endif
215
216#endif /* __XFS_QM_H__ */