fs/xfs/xfs_qm.h

   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
  24 struct xfs_inode;
  25
  26 extern 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  */
  60 typedef 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
  88 static inline struct radix_tree_root *
  89 xfs_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
 106 static inline struct xfs_inode *
 107 xfs_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
 122 extern void     xfs_trans_mod_dquot(struct xfs_trans *,
 123                                         struct xfs_dquot *, uint, long);
 124 extern 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);
 128 extern void     xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
 129 extern 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  */
 136 enum {
 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
 143 struct 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
 159 extern void             xfs_qm_destroy_quotainfo(struct xfs_mount *);
 160
 161 /* dquot stuff */
 162 extern void             xfs_qm_dqpurge_all(struct xfs_mount *, uint);
 163 extern void             xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
 164
 165 /* quota ops */
 166 extern int              xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
 167 extern int              xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t,
 168                                         uint, struct qc_dqblk *);
 169 extern int              xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
 170                                         struct qc_dqblk *);
 171 extern int              xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 172 extern int              xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 173
 174 #endif /* __XFS_QM_H__ */