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 26struct xfs_qm; 27struct xfs_inode; 28 29extern uint ndquot; 30extern mutex_t xfs_Gqm_lock; 31extern struct xfs_qm *xfs_Gqm; 32extern kmem_zone_t *qm_dqzone; 33extern 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 (NBPP / sizeof(xfs_dqhash_t)) 56#define XFS_QM_HASHSIZE_HIGH ((NBPP * 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 * When doing a quotacheck, we log dquot clusters of this many FSBs at most 70 * in a single transaction. We don't want to ask for too huge a log reservation. 71 */ 72#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3 73 74typedef xfs_dqhash_t xfs_dqlist_t; 75/* 76 * The freelist head. The first two fields match the first two in the 77 * xfs_dquot_t structure (in xfs_dqmarker_t) 78 */ 79typedef struct xfs_frlist { 80 struct xfs_dquot *qh_next; 81 struct xfs_dquot *qh_prev; 82 mutex_t qh_lock; 83 uint qh_version; 84 uint qh_nelems; 85} xfs_frlist_t; 86 87/* 88 * Quota Manager (global) structure. Lives only in core. 89 */ 90typedef struct xfs_qm { 91 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */ 92 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */ 93 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */ 94 xfs_frlist_t qm_dqfreelist; /* freelist of dquots */ 95 atomic_t qm_totaldquots; /* total incore dquots */ 96 uint qm_nrefs; /* file systems with quota on */ 97 int qm_dqfree_ratio;/* ratio of free to inuse dquots */ 98 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */ 99 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */ 100} xfs_qm_t; 101 102/* 103 * Various quota information for individual filesystems. 104 * The mount structure keeps a pointer to this. 105 */ 106typedef struct xfs_quotainfo { 107 xfs_inode_t *qi_uquotaip; /* user quota inode */ 108 xfs_inode_t *qi_gquotaip; /* group quota inode */ 109 lock_t qi_pinlock; /* dquot pinning mutex */ 110 xfs_dqlist_t qi_dqlist; /* all dquots in filesys */ 111 int qi_dqreclaims; /* a change here indicates 112 a removal in the dqlist */ 113 time_t qi_btimelimit; /* limit for blks timer */ 114 time_t qi_itimelimit; /* limit for inodes timer */ 115 time_t qi_rtbtimelimit;/* limit for rt blks timer */ 116 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */ 117 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */ 118 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */ 119 mutex_t qi_quotaofflock;/* to serialize quotaoff */ 120 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */ 121 uint qi_dqperchunk; /* # ondisk dqs in above chunk */ 122 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */ 123 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */ 124 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */ 125 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */ 126 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */ 127 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */ 128} xfs_quotainfo_t; 129 130 131extern xfs_dqtrxops_t xfs_trans_dquot_ops; 132 133extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long); 134extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *, 135 xfs_dquot_t *, xfs_dquot_t *, long, long, uint); 136extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *); 137extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *); 138 139/* 140 * We keep the usr and grp dquots separately so that locking will be easier 141 * to do at commit time. All transactions that we know of at this point 142 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value. 143 */ 144#define XFS_QM_TRANS_MAXDQS 2 145typedef struct xfs_dquot_acct { 146 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS]; 147 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS]; 148} xfs_dquot_acct_t; 149 150/* 151 * Users are allowed to have a usage exceeding their softlimit for 152 * a period this long. 153 */ 154#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */ 155#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */ 156#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */ 157 158#define XFS_QM_BWARNLIMIT 5 159#define XFS_QM_IWARNLIMIT 5 160#define XFS_QM_RTBWARNLIMIT 5 161 162#define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock)) 163#define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock)) 164#define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++) 165#define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--) 166 167extern void xfs_qm_destroy_quotainfo(xfs_mount_t *); 168extern int xfs_qm_mount_quotas(xfs_mount_t *, int); 169extern void xfs_qm_mount_quotainit(xfs_mount_t *, uint); 170extern int xfs_qm_quotacheck(xfs_mount_t *); 171extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *); 172extern int xfs_qm_unmount_quotas(xfs_mount_t *); 173extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t); 174extern int xfs_qm_sync(xfs_mount_t *, short); 175 176/* dquot stuff */ 177extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **); 178extern int xfs_qm_dqattach(xfs_inode_t *, uint); 179extern void xfs_qm_dqdetach(xfs_inode_t *); 180extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint); 181extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint); 182 183/* vop stuff */ 184extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *, 185 uid_t, gid_t, prid_t, uint, 186 xfs_dquot_t **, xfs_dquot_t **); 187extern void xfs_qm_vop_dqattach_and_dqmod_newinode( 188 xfs_trans_t *, xfs_inode_t *, 189 xfs_dquot_t *, xfs_dquot_t *); 190extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **); 191extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *, 192 xfs_dquot_t **, xfs_dquot_t *); 193extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *, 194 xfs_dquot_t *, xfs_dquot_t *, uint); 195 196/* list stuff */ 197extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *); 198extern void xfs_qm_freelist_unlink(xfs_dquot_t *); 199extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *); 200 201/* system call interface */ 202extern int xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t); 203 204#ifdef DEBUG 205extern int xfs_qm_internalqcheck(xfs_mount_t *); 206#else 207#define xfs_qm_internalqcheck(mp) (0) 208#endif 209 210#endif /* __XFS_QM_H__ */ 211