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 struct mutex 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 * Dquot hashtable constants/threshold values. 36 */ 37 #define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t)) 38 #define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t)) 39 40 /* 41 * This defines the unit of allocation of dquots. 42 * Currently, it is just one file system block, and a 4K blk contains 30 43 * (136 * 30 = 4080) dquots. It's probably not worth trying to make 44 * this more dynamic. 45 * XXXsup However, if this number is changed, we have to make sure that we don't 46 * implicitly assume that we do allocations in chunks of a single filesystem 47 * block in the dquot/xqm code. 48 */ 49 #define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1 50 51 typedef xfs_dqhash_t xfs_dqlist_t; 52 53 /* 54 * Quota Manager (global) structure. Lives only in core. 55 */ 56 typedef struct xfs_qm { 57 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */ 58 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */ 59 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */ 60 struct list_head qm_dqfrlist; /* freelist of dquots */ 61 struct mutex qm_dqfrlist_lock; 62 int qm_dqfrlist_cnt; 63 atomic_t qm_totaldquots; /* total incore dquots */ 64 uint qm_nrefs; /* file systems with quota on */ 65 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */ 66 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */ 67 } xfs_qm_t; 68 69 /* 70 * Various quota information for individual filesystems. 71 * The mount structure keeps a pointer to this. 72 */ 73 typedef struct xfs_quotainfo { 74 xfs_inode_t *qi_uquotaip; /* user quota inode */ 75 xfs_inode_t *qi_gquotaip; /* group quota inode */ 76 struct list_head qi_dqlist; /* all dquots in filesys */ 77 struct mutex qi_dqlist_lock; 78 int qi_dquots; 79 int qi_dqreclaims; /* a change here indicates 80 a removal in the dqlist */ 81 time_t qi_btimelimit; /* limit for blks timer */ 82 time_t qi_itimelimit; /* limit for inodes timer */ 83 time_t qi_rtbtimelimit;/* limit for rt blks timer */ 84 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */ 85 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */ 86 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */ 87 struct mutex qi_quotaofflock;/* to serialize quotaoff */ 88 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */ 89 uint qi_dqperchunk; /* # ondisk dqs in above chunk */ 90 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */ 91 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */ 92 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */ 93 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */ 94 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */ 95 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */ 96 } xfs_quotainfo_t; 97 98 99 extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long); 100 extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *, 101 xfs_dquot_t *, xfs_dquot_t *, long, long, uint); 102 extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *); 103 extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *); 104 105 /* 106 * We keep the usr and grp dquots separately so that locking will be easier 107 * to do at commit time. All transactions that we know of at this point 108 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value. 109 */ 110 #define XFS_QM_TRANS_MAXDQS 2 111 typedef struct xfs_dquot_acct { 112 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS]; 113 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS]; 114 } xfs_dquot_acct_t; 115 116 /* 117 * Users are allowed to have a usage exceeding their softlimit for 118 * a period this long. 119 */ 120 #define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */ 121 #define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */ 122 #define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */ 123 124 #define XFS_QM_BWARNLIMIT 5 125 #define XFS_QM_IWARNLIMIT 5 126 #define XFS_QM_RTBWARNLIMIT 5 127 128 extern void xfs_qm_destroy_quotainfo(xfs_mount_t *); 129 extern int xfs_qm_quotacheck(xfs_mount_t *); 130 extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t); 131 132 /* dquot stuff */ 133 extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint); 134 extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint); 135 136 /* quota ops */ 137 extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint); 138 extern int xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint, 139 fs_disk_quota_t *); 140 extern int xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint, 141 fs_disk_quota_t *); 142 extern int xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *); 143 extern int xfs_qm_scall_quotaon(xfs_mount_t *, uint); 144 extern int xfs_qm_scall_quotaoff(xfs_mount_t *, uint); 145 146 #endif /* __XFS_QM_H__ */ 147