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 mutex qi_tree_lock;
  48         xfs_inode_t     *qi_uquotaip;    /* user quota inode */
  49         xfs_inode_t     *qi_gquotaip;    /* group quota inode */
  50         struct list_head qi_lru_list;
  51         struct mutex     qi_lru_lock;
  52         int              qi_lru_count;
  53         int              qi_dquots;
  54         time_t           qi_btimelimit;  /* limit for blks timer */
  55         time_t           qi_itimelimit;  /* limit for inodes timer */
  56         time_t           qi_rtbtimelimit;/* limit for rt blks timer */
  57         xfs_qwarncnt_t   qi_bwarnlimit;  /* limit for blks warnings */
  58         xfs_qwarncnt_t   qi_iwarnlimit;  /* limit for inodes warnings */
  59         xfs_qwarncnt_t   qi_rtbwarnlimit;/* limit for rt blks warnings */
  60         struct mutex     qi_quotaofflock;/* to serialize quotaoff */
  61         xfs_filblks_t    qi_dqchunklen;  /* # BBs in a chunk of dqs */
  62         uint             qi_dqperchunk;  /* # ondisk dqs in above chunk */
  63         xfs_qcnt_t       qi_bhardlimit;  /* default data blk hard limit */
  64         xfs_qcnt_t       qi_bsoftlimit;  /* default data blk soft limit */
  65         xfs_qcnt_t       qi_ihardlimit;  /* default inode count hard limit */
  66         xfs_qcnt_t       qi_isoftlimit;  /* default inode count soft limit */
  67         xfs_qcnt_t       qi_rtbhardlimit;/* default realtime blk hard limit */
  68         xfs_qcnt_t       qi_rtbsoftlimit;/* default realtime blk soft limit */
  69         struct shrinker  qi_shrinker;
  70 } xfs_quotainfo_t;
  71
  72 #define XFS_DQUOT_TREE(qi, type) \
  73         ((type & XFS_DQ_USER) ? \
  74          &((qi)->qi_uquota_tree) : \
  75          &((qi)->qi_gquota_tree))
  76
  77
  78 extern void     xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
  79 extern int      xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
  80                         xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
  81 extern void     xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
  82 extern void     xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
  83
  84 /*
  85  * We keep the usr and grp dquots separately so that locking will be easier
  86  * to do at commit time. All transactions that we know of at this point
  87  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
  88  */
  89 #define XFS_QM_TRANS_MAXDQS             2
  90 typedef struct xfs_dquot_acct {
  91         xfs_dqtrx_t     dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
  92         xfs_dqtrx_t     dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
  93 } xfs_dquot_acct_t;
  94
  95 /*
  96  * Users are allowed to have a usage exceeding their softlimit for
  97  * a period this long.
  98  */
  99 #define XFS_QM_BTIMELIMIT       (7 * 24*60*60)          /* 1 week */
 100 #define XFS_QM_RTBTIMELIMIT     (7 * 24*60*60)          /* 1 week */
 101 #define XFS_QM_ITIMELIMIT       (7 * 24*60*60)          /* 1 week */
 102
 103 #define XFS_QM_BWARNLIMIT       5
 104 #define XFS_QM_IWARNLIMIT       5
 105 #define XFS_QM_RTBWARNLIMIT     5
 106
 107 extern void             xfs_qm_destroy_quotainfo(xfs_mount_t *);
 108 extern int              xfs_qm_quotacheck(xfs_mount_t *);
 109 extern int              xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
 110
 111 /* dquot stuff */
 112 extern void             xfs_qm_dqpurge_all(xfs_mount_t *, uint);
 113 extern void             xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
 114
 115 /* quota ops */
 116 extern int              xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
 117 extern int              xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
 118                                         fs_disk_quota_t *);
 119 extern int              xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
 120                                         fs_disk_quota_t *);
 121 extern int              xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
 122 extern int              xfs_qm_scall_quotaon(xfs_mount_t *, uint);
 123 extern int              xfs_qm_scall_quotaoff(xfs_mount_t *, uint);
 124
 125 #endif /* __XFS_QM_H__ */