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 struct xfs_def_quota {
  57         xfs_qcnt_t       bhardlimit;     /* default data blk hard limit */
  58         xfs_qcnt_t       bsoftlimit;     /* default data blk soft limit */
  59         xfs_qcnt_t       ihardlimit;     /* default inode count hard limit */
  60         xfs_qcnt_t       isoftlimit;     /* default inode count soft limit */
  61         xfs_qcnt_t       rtbhardlimit;   /* default realtime blk hard limit */
  62         xfs_qcnt_t       rtbsoftlimit;   /* default realtime blk soft limit */
  63 };
  64
  65 /*
  66  * Various quota information for individual filesystems.
  67  * The mount structure keeps a pointer to this.
  68  */
  69 typedef struct xfs_quotainfo {
  70         struct radix_tree_root qi_uquota_tree;
  71         struct radix_tree_root qi_gquota_tree;
  72         struct radix_tree_root qi_pquota_tree;
  73         struct mutex qi_tree_lock;
  74         struct xfs_inode        *qi_uquotaip;   /* user quota inode */
  75         struct xfs_inode        *qi_gquotaip;   /* group quota inode */
  76         struct xfs_inode        *qi_pquotaip;   /* project quota inode */
  77         struct list_lru  qi_lru;
  78         int              qi_dquots;
  79         time_t           qi_btimelimit;  /* limit for blks timer */
  80         time_t           qi_itimelimit;  /* limit for inodes timer */
  81         time_t           qi_rtbtimelimit;/* limit for rt blks timer */
  82         xfs_qwarncnt_t   qi_bwarnlimit;  /* limit for blks warnings */
  83         xfs_qwarncnt_t   qi_iwarnlimit;  /* limit for inodes warnings */
  84         xfs_qwarncnt_t   qi_rtbwarnlimit;/* limit for rt blks warnings */
  85         struct mutex     qi_quotaofflock;/* to serialize quotaoff */
  86         xfs_filblks_t    qi_dqchunklen;  /* # BBs in a chunk of dqs */
  87         uint             qi_dqperchunk;  /* # ondisk dqs in above chunk */
  88         struct xfs_def_quota    qi_usr_default;
  89         struct xfs_def_quota    qi_grp_default;
  90         struct xfs_def_quota    qi_prj_default;
  91         struct shrinker  qi_shrinker;
  92 } xfs_quotainfo_t;
  93
  94 static inline struct radix_tree_root *
  95 xfs_dquot_tree(
  96         struct xfs_quotainfo    *qi,
  97         int                     type)
  98 {
  99         switch (type) {
 100         case XFS_DQ_USER:
 101                 return &qi->qi_uquota_tree;
 102         case XFS_DQ_GROUP:
 103                 return &qi->qi_gquota_tree;
 104         case XFS_DQ_PROJ:
 105                 return &qi->qi_pquota_tree;
 106         default:
 107                 ASSERT(0);
 108         }
 109         return NULL;
 110 }
 111
 112 static inline struct xfs_inode *
 113 xfs_quota_inode(xfs_mount_t *mp, uint dq_flags)
 114 {
 115         switch (dq_flags & XFS_DQ_ALLTYPES) {
 116         case XFS_DQ_USER:
 117                 return mp->m_quotainfo->qi_uquotaip;
 118         case XFS_DQ_GROUP:
 119                 return mp->m_quotainfo->qi_gquotaip;
 120         case XFS_DQ_PROJ:
 121                 return mp->m_quotainfo->qi_pquotaip;
 122         default:
 123                 ASSERT(0);
 124         }
 125         return NULL;
 126 }
 127
 128 extern void     xfs_trans_mod_dquot(struct xfs_trans *,
 129                                         struct xfs_dquot *, uint, long);
 130 extern int      xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
 131                         struct xfs_mount *, struct xfs_dquot *,
 132                         struct xfs_dquot *, struct xfs_dquot *,
 133                         long, long, uint);
 134 extern void     xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
 135 extern void     xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
 136
 137 /*
 138  * We keep the usr, grp, and prj dquots separately so that locking will be
 139  * easier to do at commit time. All transactions that we know of at this point
 140  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
 141  */
 142 enum {
 143         XFS_QM_TRANS_USR = 0,
 144         XFS_QM_TRANS_GRP,
 145         XFS_QM_TRANS_PRJ,
 146         XFS_QM_TRANS_DQTYPES
 147 };
 148 #define XFS_QM_TRANS_MAXDQS             2
 149 struct xfs_dquot_acct {
 150         struct xfs_dqtrx        dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
 151 };
 152
 153 /*
 154  * Users are allowed to have a usage exceeding their softlimit for
 155  * a period this long.
 156  */
 157 #define XFS_QM_BTIMELIMIT       (7 * 24*60*60)          /* 1 week */
 158 #define XFS_QM_RTBTIMELIMIT     (7 * 24*60*60)          /* 1 week */
 159 #define XFS_QM_ITIMELIMIT       (7 * 24*60*60)          /* 1 week */
 160
 161 #define XFS_QM_BWARNLIMIT       5
 162 #define XFS_QM_IWARNLIMIT       5
 163 #define XFS_QM_RTBWARNLIMIT     5
 164
 165 extern void             xfs_qm_destroy_quotainfo(struct xfs_mount *);
 166
 167 /* dquot stuff */
 168 extern void             xfs_qm_dqpurge_all(struct xfs_mount *, uint);
 169 extern void             xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
 170
 171 /* quota ops */
 172 extern int              xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
 173 extern int              xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t *,
 174                                         uint, struct qc_dqblk *, uint);
 175 extern int              xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
 176                                         struct qc_dqblk *);
 177 extern int              xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 178 extern int              xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 179
 180 static inline struct xfs_def_quota *
 181 xfs_get_defquota(struct xfs_dquot *dqp, struct xfs_quotainfo *qi)
 182 {
 183         struct xfs_def_quota *defq;
 184
 185         if (XFS_QM_ISUDQ(dqp))
 186                 defq = &qi->qi_usr_default;
 187         else if (XFS_QM_ISGDQ(dqp))
 188                 defq = &qi->qi_grp_default;
 189         else {
 190                 ASSERT(XFS_QM_ISPDQ(dqp));
 191                 defq = &qi->qi_prj_default;
 192         }
 193         return defq;
 194 }
 195
 196 #endif /* __XFS_QM_H__ */