linux/fs/xfs/xfs_qm.h
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   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
  25struct xfs_inode;
  26
  27extern 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 */
  44typedef 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
  74static inline struct radix_tree_root *
  75xfs_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
  92static inline struct xfs_inode *
  93xfs_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
 108extern int      xfs_qm_calc_dquots_per_chunk(struct xfs_mount *mp,
 109                                             unsigned int nbblks);
 110extern void     xfs_trans_mod_dquot(struct xfs_trans *,
 111                                        struct xfs_dquot *, uint, long);
 112extern 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);
 116extern void     xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
 117extern 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 */
 124enum {
 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
 131struct 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
 147extern void             xfs_qm_destroy_quotainfo(struct xfs_mount *);
 148extern int              xfs_qm_quotacheck(struct xfs_mount *);
 149extern int              xfs_qm_write_sb_changes(struct xfs_mount *, __int64_t);
 150
 151/* dquot stuff */
 152extern void             xfs_qm_dqpurge_all(struct xfs_mount *, uint);
 153extern void             xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
 154
 155/* quota ops */
 156extern int              xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
 157extern int              xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t,
 158                                        uint, struct fs_disk_quota *);
 159extern int              xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
 160                                        struct fs_disk_quota *);
 161extern int              xfs_qm_scall_getqstat(struct xfs_mount *,
 162                                        struct fs_quota_stat *);
 163extern int              xfs_qm_scall_quotaon(struct xfs_mount *, uint);
 164extern int              xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
 165
 166#endif /* __XFS_QM_H__ */
 167
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