2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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.
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.
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
21 #include "xfs_dquot_item.h"
22 #include "xfs_dquot.h"
23 #include "xfs_quota_priv.h"
24 #include "xfs_qm_stats.h"
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;
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.
39 #define XFS_QM_SYNC_MAX_RESTARTS 7
42 * Ditto, for xfs_qm_dqreclaim_one.
44 #define XFS_QM_RECLAIM_MAX_RESTARTS 4
47 * Ideal ratio of free to in use dquots. Quota manager makes an attempt
48 * to keep this balance.
50 #define XFS_QM_DQFREE_RATIO 2
53 * Dquot hashtable constants/threshold values.
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))
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
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.
67 #define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
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.
72 #define XFS_QM_MAX_DQCLUSTER_LOGSZ 3
74 typedef xfs_dqhash_t xfs_dqlist_t;
76 * The freelist head. The first two fields match the first two in the
77 * xfs_dquot_t structure (in xfs_dqmarker_t)
79 typedef struct xfs_frlist {
80 struct xfs_dquot *qh_next;
81 struct xfs_dquot *qh_prev;
88 * Quota Manager (global) structure. Lives only in core.
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 */
103 * Various quota information for individual filesystems.
104 * The mount structure keeps a pointer to this.
106 typedef struct xfs_quotainfo {
107 xfs_inode_t *qi_uquotaip; /* user quota inode */
108 xfs_inode_t *qi_gquotaip; /* group quota inode */
109 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 */
115 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 */
118 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 */
130 extern xfs_dqtrxops_t xfs_trans_dquot_ops;
132 extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
133 extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
134 xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
135 extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
136 extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
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.
143 #define XFS_QM_TRANS_MAXDQS 2
144 typedef struct xfs_dquot_acct {
145 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
146 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
150 * Users are allowed to have a usage exceeding their softlimit for
151 * a period this long.
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 */
157 #define XFS_QM_BWARNLIMIT 5
158 #define XFS_QM_IWARNLIMIT 5
159 #define XFS_QM_RTBWARNLIMIT 5
161 extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
162 extern void xfs_qm_mount_quotas(xfs_mount_t *);
163 extern int xfs_qm_quotacheck(xfs_mount_t *);
164 extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
165 extern void xfs_qm_unmount_quotas(xfs_mount_t *);
166 extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
167 extern int xfs_qm_sync(xfs_mount_t *, int);
170 extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
171 extern int xfs_qm_dqattach(xfs_inode_t *, uint);
172 extern void xfs_qm_dqdetach(xfs_inode_t *);
173 extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
174 extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
177 extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
178 uid_t, gid_t, prid_t, uint,
179 xfs_dquot_t **, xfs_dquot_t **);
180 extern void xfs_qm_vop_dqattach_and_dqmod_newinode(
181 xfs_trans_t *, xfs_inode_t *,
182 xfs_dquot_t *, xfs_dquot_t *);
183 extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **);
184 extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
185 xfs_dquot_t **, xfs_dquot_t *);
186 extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
187 xfs_dquot_t *, xfs_dquot_t *, uint);
190 extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
191 extern void xfs_qm_freelist_unlink(xfs_dquot_t *);
192 extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *);
194 /* system call interface */
195 extern int xfs_qm_quotactl(struct xfs_mount *, int, int,
199 extern int xfs_qm_internalqcheck(xfs_mount_t *);
201 #define xfs_qm_internalqcheck(mp) (0)
204 #endif /* __XFS_QM_H__ */