fs/xfs/quota/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 #include "xfs_qm_stats.h"
  25
  26 struct xfs_qm;
  27 struct xfs_inode;
  28
  29 extern mutex_t          xfs_Gqm_lock;
  30 extern struct xfs_qm    *xfs_Gqm;
  31 extern kmem_zone_t      *qm_dqzone;
  32 extern kmem_zone_t      *qm_dqtrxzone;
  33
  34 /*
  35  * Used in xfs_qm_sync called by xfs_sync to count the max times that it can
  36  * iterate over the mountpt's dquot list in one call.
  37  */
  38 #define XFS_QM_SYNC_MAX_RESTARTS        7
  39
  40 /*
  41  * Ditto, for xfs_qm_dqreclaim_one.
  42  */
  43 #define XFS_QM_RECLAIM_MAX_RESTARTS     4
  44
  45 /*
  46  * Ideal ratio of free to in use dquots. Quota manager makes an attempt
  47  * to keep this balance.
  48  */
  49 #define XFS_QM_DQFREE_RATIO             2
  50
  51 /*
  52  * Dquot hashtable constants/threshold values.
  53  */
  54 #define XFS_QM_NCSIZE_THRESHOLD         5000
  55 #define XFS_QM_HASHSIZE_LOW             32
  56 #define XFS_QM_HASHSIZE_HIGH            64
  57
  58 /*
  59  * We output a cmn_err when quotachecking a quota file with more than
  60  * this many fsbs.
  61  */
  62 #define XFS_QM_BIG_QCHECK_NBLKS         500
  63
  64 /*
  65  * This defines the unit of allocation of dquots.
  66  * Currently, it is just one file system block, and a 4K blk contains 30
  67  * (136 * 30 = 4080) dquots. It's probably not worth trying to make
  68  * this more dynamic.
  69  * XXXsup However, if this number is changed, we have to make sure that we don't
  70  * implicitly assume that we do allocations in chunks of a single filesystem
  71  * block in the dquot/xqm code.
  72  */
  73 #define XFS_DQUOT_CLUSTER_SIZE_FSB      (xfs_filblks_t)1
  74 /*
  75  * When doing a quotacheck, we log dquot clusters of this many FSBs at most
  76  * in a single transaction. We don't want to ask for too huge a log reservation.
  77  */
  78 #define XFS_QM_MAX_DQCLUSTER_LOGSZ      3
  79
  80 typedef xfs_dqhash_t    xfs_dqlist_t;
  81 /*
  82  * The freelist head. The first two fields match the first two in the
  83  * xfs_dquot_t structure (in xfs_dqmarker_t)
  84  */
  85 typedef struct xfs_frlist {
  86        struct xfs_dquot *qh_next;
  87        struct xfs_dquot *qh_prev;
  88        mutex_t           qh_lock;
  89        uint              qh_version;
  90        uint              qh_nelems;
  91 } xfs_frlist_t;
  92
  93 /*
  94  * Quota Manager (global) structure. Lives only in core.
  95  */
  96 typedef struct xfs_qm {
  97         xfs_dqlist_t    *qm_usr_dqhtable;/* udquot hash table */
  98         xfs_dqlist_t    *qm_grp_dqhtable;/* gdquot hash table */
  99         uint             qm_dqhashmask;  /* # buckets in dq hashtab - 1 */
 100         xfs_frlist_t     qm_dqfreelist;  /* freelist of dquots */
 101         atomic_t         qm_totaldquots; /* total incore dquots */
 102         uint             qm_nrefs;       /* file systems with quota on */
 103         int              qm_dqfree_ratio;/* ratio of free to inuse dquots */
 104         kmem_zone_t     *qm_dqzone;      /* dquot mem-alloc zone */
 105         kmem_zone_t     *qm_dqtrxzone;   /* t_dqinfo of transactions */
 106 } xfs_qm_t;
 107
 108 /*
 109  * Various quota information for individual filesystems.
 110  * The mount structure keeps a pointer to this.
 111  */
 112 typedef struct xfs_quotainfo {
 113         xfs_inode_t     *qi_uquotaip;    /* user quota inode */
 114         xfs_inode_t     *qi_gquotaip;    /* group quota inode */
 115         lock_t           qi_pinlock;     /* dquot pinning mutex */
 116         xfs_dqlist_t     qi_dqlist;      /* all dquots in filesys */
 117         int              qi_dqreclaims;  /* a change here indicates
 118                                             a removal in the dqlist */
 119         time_t           qi_btimelimit;  /* limit for blks timer */
 120         time_t           qi_itimelimit;  /* limit for inodes timer */
 121         time_t           qi_rtbtimelimit;/* limit for rt blks timer */
 122         xfs_qwarncnt_t   qi_bwarnlimit;  /* limit for blks warnings */
 123         xfs_qwarncnt_t   qi_iwarnlimit;  /* limit for inodes warnings */
 124         xfs_qwarncnt_t   qi_rtbwarnlimit;/* limit for rt blks warnings */
 125         mutex_t          qi_quotaofflock;/* to serialize quotaoff */
 126         xfs_filblks_t    qi_dqchunklen;  /* # BBs in a chunk of dqs */
 127         uint             qi_dqperchunk;  /* # ondisk dqs in above chunk */
 128         xfs_qcnt_t       qi_bhardlimit;  /* default data blk hard limit */
 129         xfs_qcnt_t       qi_bsoftlimit;  /* default data blk soft limit */
 130         xfs_qcnt_t       qi_ihardlimit;  /* default inode count hard limit */
 131         xfs_qcnt_t       qi_isoftlimit;  /* default inode count soft limit */
 132         xfs_qcnt_t       qi_rtbhardlimit;/* default realtime blk hard limit */
 133         xfs_qcnt_t       qi_rtbsoftlimit;/* default realtime blk soft limit */
 134 } xfs_quotainfo_t;
 135
 136
 137 extern xfs_dqtrxops_t   xfs_trans_dquot_ops;
 138
 139 extern void     xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
 140 extern int      xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
 141                         xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
 142 extern void     xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
 143 extern void     xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
 144
 145 /*
 146  * We keep the usr and grp dquots separately so that locking will be easier
 147  * to do at commit time. All transactions that we know of at this point
 148  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
 149  */
 150 #define XFS_QM_TRANS_MAXDQS             2
 151 typedef struct xfs_dquot_acct {
 152         xfs_dqtrx_t     dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
 153         xfs_dqtrx_t     dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
 154 } xfs_dquot_acct_t;
 155
 156 /*
 157  * Users are allowed to have a usage exceeding their softlimit for
 158  * a period this long.
 159  */
 160 #define XFS_QM_BTIMELIMIT       (7 * 24*60*60)          /* 1 week */
 161 #define XFS_QM_RTBTIMELIMIT     (7 * 24*60*60)          /* 1 week */
 162 #define XFS_QM_ITIMELIMIT       (7 * 24*60*60)          /* 1 week */
 163
 164 #define XFS_QM_BWARNLIMIT       5
 165 #define XFS_QM_IWARNLIMIT       5
 166 #define XFS_QM_RTBWARNLIMIT     5
 167
 168 #define XFS_QM_LOCK(xqm)        (mutex_lock(&xqm##_lock, PINOD))
 169 #define XFS_QM_UNLOCK(xqm)      (mutex_unlock(&xqm##_lock))
 170 #define XFS_QM_HOLD(xqm)        ((xqm)->qm_nrefs++)
 171 #define XFS_QM_RELE(xqm)        ((xqm)->qm_nrefs--)
 172
 173 extern void             xfs_qm_destroy_quotainfo(xfs_mount_t *);
 174 extern int              xfs_qm_mount_quotas(xfs_mount_t *, int);
 175 extern void             xfs_qm_mount_quotainit(xfs_mount_t *, uint);
 176 extern int              xfs_qm_quotacheck(xfs_mount_t *);
 177 extern void             xfs_qm_unmount_quotadestroy(xfs_mount_t *);
 178 extern int              xfs_qm_unmount_quotas(xfs_mount_t *);
 179 extern int              xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
 180 extern int              xfs_qm_sync(xfs_mount_t *, short);
 181
 182 /* dquot stuff */
 183 extern boolean_t        xfs_qm_dqalloc_incore(xfs_dquot_t **);
 184 extern int              xfs_qm_dqattach(xfs_inode_t *, uint);
 185 extern void             xfs_qm_dqdetach(xfs_inode_t *);
 186 extern int              xfs_qm_dqpurge_all(xfs_mount_t *, uint);
 187 extern void             xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
 188
 189 /* vop stuff */
 190 extern int              xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
 191                                         uid_t, gid_t, prid_t, uint,
 192                                         xfs_dquot_t **, xfs_dquot_t **);
 193 extern void             xfs_qm_vop_dqattach_and_dqmod_newinode(
 194                                         xfs_trans_t *, xfs_inode_t *,
 195                                         xfs_dquot_t *, xfs_dquot_t *);
 196 extern int              xfs_qm_vop_rename_dqattach(xfs_inode_t **);
 197 extern xfs_dquot_t *    xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
 198                                         xfs_dquot_t **, xfs_dquot_t *);
 199 extern int              xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
 200                                         xfs_dquot_t *, xfs_dquot_t *, uint);
 201
 202 /* list stuff */
 203 extern void             xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
 204 extern void             xfs_qm_freelist_unlink(xfs_dquot_t *);
 205 extern int              xfs_qm_freelist_lock_nowait(xfs_qm_t *);
 206
 207 /* system call interface */
 208 extern int              xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);
 209
 210 #ifdef DEBUG
 211 extern int              xfs_qm_internalqcheck(xfs_mount_t *);
 212 #else
 213 #define xfs_qm_internalqcheck(mp)       (0)
 214 #endif
 215
 216 #endif /* __XFS_QM_H__ */