LXR linux/fs/xfs/xfs

   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 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
  78extern void     xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
  79extern int      xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
  80                        xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
  81extern void     xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
  82extern 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
  90typedef 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
 107extern void             xfs_qm_destroy_quotainfo(xfs_mount_t *);
 108extern int              xfs_qm_quotacheck(xfs_mount_t *);
 109extern int              xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
 110
 111/* dquot stuff */
 112extern void             xfs_qm_dqpurge_all(xfs_mount_t *, uint);
 113extern void             xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
 114
 115/* quota ops */
 116extern int              xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint);
 117extern int              xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint,
 118                                        fs_disk_quota_t *);
 119extern int              xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint,
 120                                        fs_disk_quota_t *);
 121extern int              xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *);
 122extern int              xfs_qm_scall_quotaon(xfs_mount_t *, uint);
 123extern int              xfs_qm_scall_quotaoff(xfs_mount_t *, uint);
 124
 125#endif /* __XFS_QM_H__ */
 126