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 #include "xfs_quota_priv.h"
  24
  25 struct xfs_inode;
  26
  27 extern struct kmem_zone *xfs_qm_dqtrxzone;
  28
  29 /*
  30  * This defines the unit of allocation of dquots.
  31  * Currently, it is just one file system block, and a 4K blk contains 30
  32  * (136 * 30 = 4080) dquots. It's probably not worth trying to make
  33  * this more dynamic.
  34  * XXXsup However, if this number is changed, we have to make sure that we don't
  35  * implicitly assume that we do allocations in chunks of a single filesystem
  36  * block in the dquot/xqm code.
  37  */
  38 #define XFS_DQUOT_CLUSTER_SIZE_FSB      (xfs_filblks_t)1
  39
  40 /*
  41  * Various quota information for individual filesystems.
  42  * The mount structure keeps a pointer to this.
  43  */
  44 typedef struct xfs_quotainfo {
  45         struct radix_tree_root qi_uquota_tree;
  46         struct radix_tree_root qi_gquota_tree;
  47         struct radix_tree_root qi_pquota_tree;
  48         struct mutex qi_tree_lock;
  49         struct xfs_inode        *qi_uquotaip;   /* user quota inode */
  50         struct xfs_inode        *qi_gquotaip;   /* group quota inode */
  51         struct xfs_inode        *qi_pquotaip;   /* project quota inode */
  52         struct list_head qi_lru_list;
  53         struct mutex     qi_lru_lock;
  54         int              qi_lru_count;
  55         int              qi_dquots;
  56         time_t           qi_btimelimit;  /* limit for blks timer */
  57         time_t           qi_itimelimit;  /* limit for inodes timer */
  58         time_t           qi_rtbtimelimit;/* limit for rt blks timer */
  59         xfs_qwarncnt_t   qi_bwarnlimit;  /* limit for blks warnings */
  60         xfs_qwarncnt_t   qi_iwarnlimit;  /* limit for inodes warnings */
  61         xfs_qwarncnt_t   qi_rtbwarnlimit;/* limit for rt blks warnings */
  62         struct mutex     qi_quotaofflock;/* to serialize quotaoff */
  63         xfs_filblks_t    qi_dqchunklen;  /* # BBs in a chunk of dqs */
  64         uint             qi_dqperchunk;  /* # ondisk dqs in above chunk */
  65         xfs_qcnt_t       qi_bhardlimit;  /* default data blk hard limit */
  66         xfs_qcnt_t       qi_bsoftlimit;  /* default data blk soft limit */
  67         xfs_qcnt_t       qi_ihardlimit;  /* default inode count hard limit */
  68         xfs_qcnt_t       qi_isoftlimit;  /* default inode count soft limit */
  69         xfs_qcnt_t       qi_rtbhardlimit;/* default realtime blk hard limit */
  70         xfs_qcnt_t       qi_rtbsoftlimit;/* default realtime blk soft limit */
  71         struct shrinker  qi_shrinker;
  72 } xfs_quotainfo_t;
  73
  74 static inline struct radix_tree_root *
  75 xfs_dquot_tree(
  76         struct xfs_quotainfo    *qi,
  77         int                     type)
  78 {
  79         switch (type) {
  80         case XFS_DQ_USER:
  81                 return &qi->qi_uquota_tree;
  82         case XFS_DQ_GROUP:
  83                 return &qi->qi_gquota_tree;
  84         case XFS_DQ_PROJ:
  85                 return &qi->qi_pquota_tree;
  86         default:
  87                 ASSERT(0);
  88         }
  89         return NULL;
  90 }
  91
  92 static inline struct xfs_inode *
  93 xfs_dq_to_quota_inode(struct xfs_dquot *dqp)
  94 {
  95         switch (dqp->dq_flags & XFS_DQ_ALLTYPES) {
  96         case XFS_DQ_USER:
  97                 return dqp->q_mount->m_quotainfo->qi_uquotaip;
  98         case XFS_DQ_GROUP:
  99                 return dqp->q_mount->m_quotainfo->qi_gquotaip;
 100         case XFS_DQ_PROJ:
 101                 return dqp->q_mount->m_quotainfo->qi_pquotaip;
 102         default:
 103                 ASSERT(0);
 104         }
 105         return NULL;
 106 }
 107
 108 extern int      xfs_qm_calc_dquots_per_chunk(struct xfs_mount *mp,
 109                                              unsigned int nbblks);
 110 extern void     xfs_trans_mod_dquot(struct xfs_trans *,
 111                                         struct xfs_dquot *, uint, long);
 112 extern int      xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
 113                         struct xfs_mount *, struct xfs_dquot *,
 114                         struct xfs_dquot *, struct xfs_dquot *,
 115                         long, long, uint);
 116 extern void     xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
 117 extern void     xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
 118
 119 /*
 120  * We keep the usr, grp, and prj dquots separately so that locking will be
 121  * easier to do at commit time. All transactions that we know of at this point
 122  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
 123  */
 124 enum {
 125         XFS_QM_TRANS_USR = 0,
 126         XFS_QM_TRANS_GRP,
 127         XFS_QM_TRANS_PRJ,
 128         XFS_QM_TRANS_DQTYPES
 129 };
 130 #define XFS_QM_TRANS_MAXDQS             2
 131 struct xfs_dquot_acct {
 132         struct xfs_dqtrx        dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
 133 };
 134
 135 /*
 136  * Users are allowed to have a usage exceeding their softlimit for
 137  * a period this long.
 138  */
 139 #define XFS_QM_BTIMELIMIT       (7 * 24*60*60)          /* 1 week */
 140 #define XFS_QM_RTBTIMELIMIT     (7 * 24*60*60)          /* 1 week */
 141 #define XFS_QM_ITIMELIMIT       (7 * 24*60*60)          /* 1 week */
 142
 143 #define XFS_QM_BWARNLIMIT       5
 144 #define XFS_QM_IWARNLIMIT       5
 145 #define XFS_QM_RTBWARNLIMIT     5
 146
 147 extern void             xfs_qm_destroy_quotainfo(struct xfs_mount *);
 148 extern int              xfs_qm_quotacheck(struct xfs_mount *);
 149 extern int              xfs_qm_write_sb_changes(struct xfs_mount *, __int64_t);
 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 fs_disk_quota *);
 159 extern int              xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
 160                                         struct fs_disk_quota *);
 161 extern int              xfs_qm_scall_getqstat(struct xfs_mount *,
 162                                         struct fs_quota_stat *);
 163 extern int              xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 164 extern int              xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 165
 166 #endif /* __XFS_QM_H__ */