root/fs/xfs/xfs_qm.h

INCLUDED FROM

DEFINITIONS

1. xfs_dquot_tree
2. xfs_quota_inode
3. xfs_get_defquota

   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__ */