xref: /openbmc/linux/fs/xfs/xfs_qm.h (revision 675aaf05)
1  // SPDX-License-Identifier: GPL-2.0
2  /*
3   * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4   * All Rights Reserved.
5   */
6  #ifndef __XFS_QM_H__
7  #define __XFS_QM_H__
8  
9  #include "xfs_dquot_item.h"
10  #include "xfs_dquot.h"
11  
12  struct xfs_inode;
13  
14  extern struct kmem_zone	*xfs_qm_dqtrxzone;
15  
16  /*
17   * Number of bmaps that we ask from bmapi when doing a quotacheck.
18   * We make this restriction to keep the memory usage to a minimum.
19   */
20  #define XFS_DQITER_MAP_SIZE	10
21  
22  #define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
23  	!dqp->q_core.d_blk_hardlimit && \
24  	!dqp->q_core.d_blk_softlimit && \
25  	!dqp->q_core.d_rtb_hardlimit && \
26  	!dqp->q_core.d_rtb_softlimit && \
27  	!dqp->q_core.d_ino_hardlimit && \
28  	!dqp->q_core.d_ino_softlimit && \
29  	!dqp->q_core.d_bcount && \
30  	!dqp->q_core.d_rtbcount && \
31  	!dqp->q_core.d_icount)
32  
33  /*
34   * This defines the unit of allocation of dquots.
35   * Currently, it is just one file system block, and a 4K blk contains 30
36   * (136 * 30 = 4080) dquots. It's probably not worth trying to make
37   * this more dynamic.
38   * XXXsup However, if this number is changed, we have to make sure that we don't
39   * implicitly assume that we do allocations in chunks of a single filesystem
40   * block in the dquot/xqm code.
41   */
42  #define XFS_DQUOT_CLUSTER_SIZE_FSB	(xfs_filblks_t)1
43  
44  struct xfs_def_quota {
45  	xfs_qcnt_t       bhardlimit;     /* default data blk hard limit */
46  	xfs_qcnt_t       bsoftlimit;	 /* default data blk soft limit */
47  	xfs_qcnt_t       ihardlimit;	 /* default inode count hard limit */
48  	xfs_qcnt_t       isoftlimit;	 /* default inode count soft limit */
49  	xfs_qcnt_t	 rtbhardlimit;   /* default realtime blk hard limit */
50  	xfs_qcnt_t	 rtbsoftlimit;   /* default realtime blk soft limit */
51  };
52  
53  /*
54   * Various quota information for individual filesystems.
55   * The mount structure keeps a pointer to this.
56   */
57  typedef struct xfs_quotainfo {
58  	struct radix_tree_root qi_uquota_tree;
59  	struct radix_tree_root qi_gquota_tree;
60  	struct radix_tree_root qi_pquota_tree;
61  	struct mutex qi_tree_lock;
62  	struct xfs_inode	*qi_uquotaip;	/* user quota inode */
63  	struct xfs_inode	*qi_gquotaip;	/* group quota inode */
64  	struct xfs_inode	*qi_pquotaip;	/* project quota inode */
65  	struct list_lru	 qi_lru;
66  	int		 qi_dquots;
67  	time_t		 qi_btimelimit;	 /* limit for blks timer */
68  	time_t		 qi_itimelimit;	 /* limit for inodes timer */
69  	time_t		 qi_rtbtimelimit;/* limit for rt blks timer */
70  	xfs_qwarncnt_t	 qi_bwarnlimit;	 /* limit for blks warnings */
71  	xfs_qwarncnt_t	 qi_iwarnlimit;	 /* limit for inodes warnings */
72  	xfs_qwarncnt_t	 qi_rtbwarnlimit;/* limit for rt blks warnings */
73  	struct mutex	 qi_quotaofflock;/* to serialize quotaoff */
74  	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */
75  	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */
76  	struct xfs_def_quota	qi_usr_default;
77  	struct xfs_def_quota	qi_grp_default;
78  	struct xfs_def_quota	qi_prj_default;
79  	struct shrinker  qi_shrinker;
80  } xfs_quotainfo_t;
81  
82  static inline struct radix_tree_root *
83  xfs_dquot_tree(
84  	struct xfs_quotainfo	*qi,
85  	int			type)
86  {
87  	switch (type) {
88  	case XFS_DQ_USER:
89  		return &qi->qi_uquota_tree;
90  	case XFS_DQ_GROUP:
91  		return &qi->qi_gquota_tree;
92  	case XFS_DQ_PROJ:
93  		return &qi->qi_pquota_tree;
94  	default:
95  		ASSERT(0);
96  	}
97  	return NULL;
98  }
99  
100  static inline struct xfs_inode *
101  xfs_quota_inode(xfs_mount_t *mp, uint dq_flags)
102  {
103  	switch (dq_flags & XFS_DQ_ALLTYPES) {
104  	case XFS_DQ_USER:
105  		return mp->m_quotainfo->qi_uquotaip;
106  	case XFS_DQ_GROUP:
107  		return mp->m_quotainfo->qi_gquotaip;
108  	case XFS_DQ_PROJ:
109  		return mp->m_quotainfo->qi_pquotaip;
110  	default:
111  		ASSERT(0);
112  	}
113  	return NULL;
114  }
115  
116  extern void	xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
117  				    uint field, int64_t delta);
118  extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
119  extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
120  
121  /*
122   * We keep the usr, grp, and prj dquots separately so that locking will be
123   * easier to do at commit time. All transactions that we know of at this point
124   * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
125   */
126  enum {
127  	XFS_QM_TRANS_USR = 0,
128  	XFS_QM_TRANS_GRP,
129  	XFS_QM_TRANS_PRJ,
130  	XFS_QM_TRANS_DQTYPES
131  };
132  #define XFS_QM_TRANS_MAXDQS		2
133  struct xfs_dquot_acct {
134  	struct xfs_dqtrx	dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
135  };
136  
137  /*
138   * Users are allowed to have a usage exceeding their softlimit for
139   * a period this long.
140   */
141  #define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
142  #define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
143  #define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */
144  
145  #define XFS_QM_BWARNLIMIT	5
146  #define XFS_QM_IWARNLIMIT	5
147  #define XFS_QM_RTBWARNLIMIT	5
148  
149  extern void		xfs_qm_destroy_quotainfo(struct xfs_mount *);
150  
151  /* dquot stuff */
152  extern void		xfs_qm_dqpurge_all(struct xfs_mount *, uint);
153  extern void		xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
154  
155  /* quota ops */
156  extern int		xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
157  extern int		xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t,
158  					uint, struct qc_dqblk *);
159  extern int		xfs_qm_scall_getquota_next(struct xfs_mount *,
160  					xfs_dqid_t *, uint, struct qc_dqblk *);
161  extern int		xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
162  					struct qc_dqblk *);
163  extern int		xfs_qm_scall_quotaon(struct xfs_mount *, uint);
164  extern int		xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
165  
166  static inline struct xfs_def_quota *
167  xfs_get_defquota(struct xfs_dquot *dqp, struct xfs_quotainfo *qi)
168  {
169  	struct xfs_def_quota *defq;
170  
171  	if (XFS_QM_ISUDQ(dqp))
172  		defq = &qi->qi_usr_default;
173  	else if (XFS_QM_ISGDQ(dqp))
174  		defq = &qi->qi_grp_default;
175  	else {
176  		ASSERT(XFS_QM_ISPDQ(dqp));
177  		defq = &qi->qi_prj_default;
178  	}
179  	return defq;
180  }
181  
182  #endif /* __XFS_QM_H__ */
183