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 uint ndquot; 30 extern struct mutex xfs_Gqm_lock; 31 extern struct xfs_qm *xfs_Gqm; 32 extern kmem_zone_t *qm_dqzone; 33 extern kmem_zone_t *qm_dqtrxzone; 34 35 /* 36 * Used in xfs_qm_sync called by xfs_sync to count the max times that it can 37 * iterate over the mountpt's dquot list in one call. 38 */ 39 #define XFS_QM_SYNC_MAX_RESTARTS 7 40 41 /* 42 * Ditto, for xfs_qm_dqreclaim_one. 43 */ 44 #define XFS_QM_RECLAIM_MAX_RESTARTS 4 45 46 /* 47 * Ideal ratio of free to in use dquots. Quota manager makes an attempt 48 * to keep this balance. 49 */ 50 #define XFS_QM_DQFREE_RATIO 2 51 52 /* 53 * Dquot hashtable constants/threshold values. 54 */ 55 #define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t)) 56 #define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t)) 57 58 /* 59 * This defines the unit of allocation of dquots. 60 * Currently, it is just one file system block, and a 4K blk contains 30 61 * (136 * 30 = 4080) dquots. It's probably not worth trying to make 62 * this more dynamic. 63 * XXXsup However, if this number is changed, we have to make sure that we don't 64 * implicitly assume that we do allocations in chunks of a single filesystem 65 * block in the dquot/xqm code. 66 */ 67 #define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1 68 69 typedef xfs_dqhash_t xfs_dqlist_t; 70 71 /* 72 * Quota Manager (global) structure. Lives only in core. 73 */ 74 typedef struct xfs_qm { 75 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */ 76 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */ 77 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */ 78 struct list_head qm_dqfrlist; /* freelist of dquots */ 79 struct mutex qm_dqfrlist_lock; 80 int qm_dqfrlist_cnt; 81 atomic_t qm_totaldquots; /* total incore dquots */ 82 uint qm_nrefs; /* file systems with quota on */ 83 int qm_dqfree_ratio;/* ratio of free to inuse dquots */ 84 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */ 85 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */ 86 } xfs_qm_t; 87 88 /* 89 * Various quota information for individual filesystems. 90 * The mount structure keeps a pointer to this. 91 */ 92 typedef struct xfs_quotainfo { 93 xfs_inode_t *qi_uquotaip; /* user quota inode */ 94 xfs_inode_t *qi_gquotaip; /* group quota inode */ 95 struct list_head qi_dqlist; /* all dquots in filesys */ 96 struct mutex qi_dqlist_lock; 97 int qi_dquots; 98 int qi_dqreclaims; /* a change here indicates 99 a removal in the dqlist */ 100 time_t qi_btimelimit; /* limit for blks timer */ 101 time_t qi_itimelimit; /* limit for inodes timer */ 102 time_t qi_rtbtimelimit;/* limit for rt blks timer */ 103 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */ 104 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */ 105 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */ 106 struct mutex qi_quotaofflock;/* to serialize quotaoff */ 107 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */ 108 uint qi_dqperchunk; /* # ondisk dqs in above chunk */ 109 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */ 110 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */ 111 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */ 112 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */ 113 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */ 114 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */ 115 } xfs_quotainfo_t; 116 117 118 extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long); 119 extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *, 120 xfs_dquot_t *, xfs_dquot_t *, long, long, uint); 121 extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *); 122 extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *); 123 124 /* 125 * We keep the usr and grp dquots separately so that locking will be easier 126 * to do at commit time. All transactions that we know of at this point 127 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value. 128 */ 129 #define XFS_QM_TRANS_MAXDQS 2 130 typedef struct xfs_dquot_acct { 131 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS]; 132 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS]; 133 } xfs_dquot_acct_t; 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 5 146 147 extern void xfs_qm_destroy_quotainfo(xfs_mount_t *); 148 extern int xfs_qm_quotacheck(xfs_mount_t *); 149 extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t); 150 151 /* dquot stuff */ 152 extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **); 153 extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint); 154 extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint); 155 156 /* quota ops */ 157 extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint); 158 extern int xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint, 159 fs_disk_quota_t *); 160 extern int xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint, 161 fs_disk_quota_t *); 162 extern int xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *); 163 extern int xfs_qm_scall_quotaon(xfs_mount_t *, uint); 164 extern int xfs_qm_scall_quotaoff(xfs_mount_t *, uint); 165 166 #ifdef DEBUG 167 extern int xfs_qm_internalqcheck(xfs_mount_t *); 168 #else 169 #define xfs_qm_internalqcheck(mp) (0) 170 #endif 171 172 #endif /* __XFS_QM_H__ */ 173