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
26 struct xfs_qm;
27 struct xfs_inode;
28
29 extern uint ndquot;
30 extern mutex_t xfs_Gqm_lock;
31 extern struct xfs_qm *xfs_Gqm;
32 extern kmem_zone_t *qm_dqzone;
33 extern 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 /*
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
74 typedef 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 */
79 typedef 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 */
90 typedef 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 */
106 typedef struct xfs_quotainfo {
107 xfs_inode_t *qi_uquotaip; /* user quota inode */
108 xfs_inode_t *qi_gquotaip; /* group quota inode */
109 spinlock_t qi_pinlock; /* dquot pinning lock */
110 xfs_dqlist_t qi_dqlist; /* all dquots in filesys */
111 int qi_dqreclaims; /* a change here indicates
112 a removal in the dqlist */
113 time_t qi_btimelimit; /* limit for blks timer */
114 time_t qi_itimelimit; /* limit for inodes timer */
115 time_t qi_rtbtimelimit;/* limit for rt blks timer */
116 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
117 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
118 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
119 mutex_t qi_quotaofflock;/* to serialize quotaoff */
120 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
121 uint qi_dqperchunk; /* # ondisk dqs in above chunk */
122 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */
123 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */
124 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */
125 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */
126 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */
127 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */
128 } xfs_quotainfo_t;
129
130
131 extern xfs_dqtrxops_t xfs_trans_dquot_ops;
132
133 extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
134 extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
135 xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
136 extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
137 extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
138
139 /*
140 * We keep the usr and grp dquots separately so that locking will be easier
141 * to do at commit time. All transactions that we know of at this point
142 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
143 */
144 #define XFS_QM_TRANS_MAXDQS 2
145 typedef struct xfs_dquot_acct {
146 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
147 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
148 } xfs_dquot_acct_t;
149
150 /*
151 * Users are allowed to have a usage exceeding their softlimit for
152 * a period this long.
153 */
154 #define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
155 #define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
156 #define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
157
158 #define XFS_QM_BWARNLIMIT 5
159 #define XFS_QM_IWARNLIMIT 5
160 #define XFS_QM_RTBWARNLIMIT 5
161
162 #define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock))
163 #define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock))
164 #define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++)
165 #define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--)
166
167 extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
168 extern int xfs_qm_mount_quotas(xfs_mount_t *, int);
169 extern int xfs_qm_quotacheck(xfs_mount_t *);
170 extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
171 extern int xfs_qm_unmount_quotas(xfs_mount_t *);
172 extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
173 extern int xfs_qm_sync(xfs_mount_t *, int);
174
175 /* dquot stuff */
176 extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
177 extern int xfs_qm_dqattach(xfs_inode_t *, uint);
178 extern void xfs_qm_dqdetach(xfs_inode_t *);
179 extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
180 extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
181
182 /* vop stuff */
183 extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
184 uid_t, gid_t, prid_t, uint,
185 xfs_dquot_t **, xfs_dquot_t **);
186 extern void xfs_qm_vop_dqattach_and_dqmod_newinode(
187 xfs_trans_t *, xfs_inode_t *,
188 xfs_dquot_t *, xfs_dquot_t *);
189 extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **);
190 extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
191 xfs_dquot_t **, xfs_dquot_t *);
192 extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
193 xfs_dquot_t *, xfs_dquot_t *, uint);
194
195 /* list stuff */
196 extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
197 extern void xfs_qm_freelist_unlink(xfs_dquot_t *);
198 extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *);
199
200 /* system call interface */
201 extern int xfs_qm_quotactl(struct xfs_mount *, int, int,
202 xfs_caddr_t);
203
204 #ifdef DEBUG
205 extern int xfs_qm_internalqcheck(xfs_mount_t *);
206 #else
207 #define xfs_qm_internalqcheck(mp) (0)
208 #endif
209
210 #endif /* __XFS_QM_H__ */
211
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