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
24struct xfs_inode;
25
26extern struct kmem_zone	*xfs_qm_dqtrxzone;
27
28/*
29 * Number of bmaps that we ask from bmapi when doing a quotacheck.
30 * We make this restriction to keep the memory usage to a minimum.
31 */
32#define XFS_DQITER_MAP_SIZE	10
33
34#define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
35	!dqp->q_core.d_blk_hardlimit && \
36	!dqp->q_core.d_blk_softlimit && \
37	!dqp->q_core.d_rtb_hardlimit && \
38	!dqp->q_core.d_rtb_softlimit && \
39	!dqp->q_core.d_ino_hardlimit && \
40	!dqp->q_core.d_ino_softlimit && \
41	!dqp->q_core.d_bcount && \
42	!dqp->q_core.d_rtbcount && \
43	!dqp->q_core.d_icount)
44
45/*
46 * This defines the unit of allocation of dquots.
47 * Currently, it is just one file system block, and a 4K blk contains 30
48 * (136 * 30 = 4080) dquots. It's probably not worth trying to make
49 * this more dynamic.
50 * XXXsup However, if this number is changed, we have to make sure that we don't
51 * implicitly assume that we do allocations in chunks of a single filesystem
52 * block in the dquot/xqm code.
53 */
54#define XFS_DQUOT_CLUSTER_SIZE_FSB	(xfs_filblks_t)1
55
56/*
57 * Various quota information for individual filesystems.
58 * The mount structure keeps a pointer to this.
59 */
60typedef struct xfs_quotainfo {
61	struct radix_tree_root qi_uquota_tree;
62	struct radix_tree_root qi_gquota_tree;
63	struct radix_tree_root qi_pquota_tree;
64	struct mutex qi_tree_lock;
65	struct xfs_inode	*qi_uquotaip;	/* user quota inode */
66	struct xfs_inode	*qi_gquotaip;	/* group quota inode */
67	struct xfs_inode	*qi_pquotaip;	/* project quota inode */
68	struct list_lru	 qi_lru;
69	int		 qi_dquots;
70	time_t		 qi_btimelimit;	 /* limit for blks timer */
71	time_t		 qi_itimelimit;	 /* limit for inodes timer */
72	time_t		 qi_rtbtimelimit;/* limit for rt blks timer */
73	xfs_qwarncnt_t	 qi_bwarnlimit;	 /* limit for blks warnings */
74	xfs_qwarncnt_t	 qi_iwarnlimit;	 /* limit for inodes warnings */
75	xfs_qwarncnt_t	 qi_rtbwarnlimit;/* limit for rt blks warnings */
76	struct mutex	 qi_quotaofflock;/* to serialize quotaoff */
77	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */
78	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */
79	xfs_qcnt_t	 qi_bhardlimit;	 /* default data blk hard limit */
80	xfs_qcnt_t	 qi_bsoftlimit;	 /* default data blk soft limit */
81	xfs_qcnt_t	 qi_ihardlimit;	 /* default inode count hard limit */
82	xfs_qcnt_t	 qi_isoftlimit;	 /* default inode count soft limit */
83	xfs_qcnt_t	 qi_rtbhardlimit;/* default realtime blk hard limit */
84	xfs_qcnt_t	 qi_rtbsoftlimit;/* default realtime blk soft limit */
85	struct shrinker  qi_shrinker;
86} xfs_quotainfo_t;
87
88static inline struct radix_tree_root *
89xfs_dquot_tree(
90	struct xfs_quotainfo	*qi,
91	int			type)
92{
93	switch (type) {
94	case XFS_DQ_USER:
95		return &qi->qi_uquota_tree;
96	case XFS_DQ_GROUP:
97		return &qi->qi_gquota_tree;
98	case XFS_DQ_PROJ:
99		return &qi->qi_pquota_tree;
100	default:
101		ASSERT(0);
102	}
103	return NULL;
104}
105
106static inline struct xfs_inode *
107xfs_dq_to_quota_inode(struct xfs_dquot *dqp)
108{
109	switch (dqp->dq_flags & XFS_DQ_ALLTYPES) {
110	case XFS_DQ_USER:
111		return dqp->q_mount->m_quotainfo->qi_uquotaip;
112	case XFS_DQ_GROUP:
113		return dqp->q_mount->m_quotainfo->qi_gquotaip;
114	case XFS_DQ_PROJ:
115		return dqp->q_mount->m_quotainfo->qi_pquotaip;
116	default:
117		ASSERT(0);
118	}
119	return NULL;
120}
121
122extern void	xfs_trans_mod_dquot(struct xfs_trans *,
123					struct xfs_dquot *, uint, long);
124extern int	xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
125			struct xfs_mount *, struct xfs_dquot *,
126			struct xfs_dquot *, struct xfs_dquot *,
127			long, long, uint);
128extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
129extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
130
131/*
132 * We keep the usr, grp, and prj dquots separately so that locking will be
133 * easier to do at commit time. All transactions that we know of at this point
134 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
135 */
136enum {
137	XFS_QM_TRANS_USR = 0,
138	XFS_QM_TRANS_GRP,
139	XFS_QM_TRANS_PRJ,
140	XFS_QM_TRANS_DQTYPES
141};
142#define XFS_QM_TRANS_MAXDQS		2
143struct xfs_dquot_acct {
144	struct xfs_dqtrx	dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
145};
146
147/*
148 * Users are allowed to have a usage exceeding their softlimit for
149 * a period this long.
150 */
151#define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
152#define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
153#define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */
154
155#define XFS_QM_BWARNLIMIT	5
156#define XFS_QM_IWARNLIMIT	5
157#define XFS_QM_RTBWARNLIMIT	5
158
159extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);
160
161/* dquot stuff */
162extern void		xfs_qm_dqpurge_all(struct xfs_mount *, uint);
163extern void		xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
164
165/* quota ops */
166extern int		xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
167extern int		xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t,
168					uint, struct qc_dqblk *);
169extern int		xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
170					struct qc_dqblk *);
171extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
172extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
173
174#endif /* __XFS_QM_H__ */
175