1 /* 2 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms of version 2 of the GNU General Public License as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it would be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 11 * 12 * Further, this software is distributed without any warranty that it is 13 * free of the rightful claim of any third person regarding infringement 14 * or the like. Any license provided herein, whether implied or 15 * otherwise, applies only to this software file. Patent licenses, if 16 * any, provided herein do not apply to combinations of this program with 17 * other software, or any other product whatsoever. 18 * 19 * You should have received a copy of the GNU General Public License along 20 * with this program; if not, write the Free Software Foundation, Inc., 59 21 * Temple Place - Suite 330, Boston MA 02111-1307, USA. 22 * 23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, 24 * Mountain View, CA 94043, or: 25 * 26 * http://www.sgi.com 27 * 28 * For further information regarding this notice, see: 29 * 30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ 31 */ 32 #ifndef __XFS_QM_H__ 33 #define __XFS_QM_H__ 34 35 #include "xfs_dquot_item.h" 36 #include "xfs_dquot.h" 37 #include "xfs_quota_priv.h" 38 #include "xfs_qm_stats.h" 39 40 struct xfs_qm; 41 struct xfs_inode; 42 43 extern mutex_t xfs_Gqm_lock; 44 extern struct xfs_qm *xfs_Gqm; 45 extern kmem_zone_t *qm_dqzone; 46 extern kmem_zone_t *qm_dqtrxzone; 47 48 /* 49 * Used in xfs_qm_sync called by xfs_sync to count the max times that it can 50 * iterate over the mountpt's dquot list in one call. 51 */ 52 #define XFS_QM_SYNC_MAX_RESTARTS 7 53 54 /* 55 * Ditto, for xfs_qm_dqreclaim_one. 56 */ 57 #define XFS_QM_RECLAIM_MAX_RESTARTS 4 58 59 /* 60 * Ideal ratio of free to in use dquots. Quota manager makes an attempt 61 * to keep this balance. 62 */ 63 #define XFS_QM_DQFREE_RATIO 2 64 65 /* 66 * Dquot hashtable constants/threshold values. 67 */ 68 #define XFS_QM_NCSIZE_THRESHOLD 5000 69 #define XFS_QM_HASHSIZE_LOW 32 70 #define XFS_QM_HASHSIZE_HIGH 64 71 72 /* 73 * We output a cmn_err when quotachecking a quota file with more than 74 * this many fsbs. 75 */ 76 #define XFS_QM_BIG_QCHECK_NBLKS 500 77 78 /* 79 * This defines the unit of allocation of dquots. 80 * Currently, it is just one file system block, and a 4K blk contains 30 81 * (136 * 30 = 4080) dquots. It's probably not worth trying to make 82 * this more dynamic. 83 * XXXsup However, if this number is changed, we have to make sure that we don't 84 * implicitly assume that we do allocations in chunks of a single filesystem 85 * block in the dquot/xqm code. 86 */ 87 #define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1 88 /* 89 * When doing a quotacheck, we log dquot clusters of this many FSBs at most 90 * in a single transaction. We don't want to ask for too huge a log reservation. 91 */ 92 #define XFS_QM_MAX_DQCLUSTER_LOGSZ 3 93 94 typedef xfs_dqhash_t xfs_dqlist_t; 95 /* 96 * The freelist head. The first two fields match the first two in the 97 * xfs_dquot_t structure (in xfs_dqmarker_t) 98 */ 99 typedef struct xfs_frlist { 100 struct xfs_dquot *qh_next; 101 struct xfs_dquot *qh_prev; 102 mutex_t qh_lock; 103 uint qh_version; 104 uint qh_nelems; 105 } xfs_frlist_t; 106 107 /* 108 * Quota Manager (global) structure. Lives only in core. 109 */ 110 typedef struct xfs_qm { 111 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */ 112 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */ 113 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */ 114 xfs_frlist_t qm_dqfreelist; /* freelist of dquots */ 115 atomic_t qm_totaldquots; /* total incore dquots */ 116 uint qm_nrefs; /* file systems with quota on */ 117 int qm_dqfree_ratio;/* ratio of free to inuse dquots */ 118 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */ 119 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */ 120 } xfs_qm_t; 121 122 /* 123 * Various quota information for individual filesystems. 124 * The mount structure keeps a pointer to this. 125 */ 126 typedef struct xfs_quotainfo { 127 xfs_inode_t *qi_uquotaip; /* user quota inode */ 128 xfs_inode_t *qi_gquotaip; /* group quota inode */ 129 lock_t qi_pinlock; /* dquot pinning mutex */ 130 xfs_dqlist_t qi_dqlist; /* all dquots in filesys */ 131 int qi_dqreclaims; /* a change here indicates 132 a removal in the dqlist */ 133 time_t qi_btimelimit; /* limit for blks timer */ 134 time_t qi_itimelimit; /* limit for inodes timer */ 135 time_t qi_rtbtimelimit;/* limit for rt blks timer */ 136 xfs_qwarncnt_t qi_bwarnlimit; /* limit for num warnings */ 137 xfs_qwarncnt_t qi_iwarnlimit; /* limit for num warnings */ 138 mutex_t qi_quotaofflock;/* to serialize quotaoff */ 139 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */ 140 uint qi_dqperchunk; /* # ondisk dqs in above chunk */ 141 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */ 142 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */ 143 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */ 144 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */ 145 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */ 146 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */ 147 } xfs_quotainfo_t; 148 149 150 extern xfs_dqtrxops_t xfs_trans_dquot_ops; 151 152 extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long); 153 extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *, 154 xfs_dquot_t *, xfs_dquot_t *, long, long, uint); 155 extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *); 156 extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *); 157 158 /* 159 * We keep the usr and grp dquots separately so that locking will be easier 160 * to do at commit time. All transactions that we know of at this point 161 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value. 162 */ 163 #define XFS_QM_TRANS_MAXDQS 2 164 typedef struct xfs_dquot_acct { 165 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS]; 166 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS]; 167 } xfs_dquot_acct_t; 168 169 /* 170 * Users are allowed to have a usage exceeding their softlimit for 171 * a period this long. 172 */ 173 #define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */ 174 #define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */ 175 #define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */ 176 177 #define XFS_QM_BWARNLIMIT 5 178 #define XFS_QM_IWARNLIMIT 5 179 180 #define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock, PINOD)) 181 #define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock)) 182 #define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++) 183 #define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--) 184 185 extern void xfs_mount_reset_sbqflags(xfs_mount_t *); 186 187 extern int xfs_qm_init_quotainfo(xfs_mount_t *); 188 extern void xfs_qm_destroy_quotainfo(xfs_mount_t *); 189 extern int xfs_qm_mount_quotas(xfs_mount_t *, int); 190 extern void xfs_qm_mount_quotainit(xfs_mount_t *, uint); 191 extern int xfs_qm_quotacheck(xfs_mount_t *); 192 extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *); 193 extern int xfs_qm_unmount_quotas(xfs_mount_t *); 194 extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t); 195 extern int xfs_qm_sync(xfs_mount_t *, short); 196 197 /* dquot stuff */ 198 extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **); 199 extern int xfs_qm_dqattach(xfs_inode_t *, uint); 200 extern void xfs_qm_dqdetach(xfs_inode_t *); 201 extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint); 202 extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint); 203 204 /* vop stuff */ 205 extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *, 206 uid_t, gid_t, uint, 207 xfs_dquot_t **, xfs_dquot_t **); 208 extern void xfs_qm_vop_dqattach_and_dqmod_newinode( 209 xfs_trans_t *, xfs_inode_t *, 210 xfs_dquot_t *, xfs_dquot_t *); 211 extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **); 212 extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *, 213 xfs_dquot_t **, xfs_dquot_t *); 214 extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *, 215 xfs_dquot_t *, xfs_dquot_t *, uint); 216 217 /* list stuff */ 218 extern void xfs_qm_freelist_init(xfs_frlist_t *); 219 extern void xfs_qm_freelist_destroy(xfs_frlist_t *); 220 extern void xfs_qm_freelist_insert(xfs_frlist_t *, xfs_dquot_t *); 221 extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *); 222 extern void xfs_qm_freelist_unlink(xfs_dquot_t *); 223 extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *); 224 extern int xfs_qm_mplist_nowait(xfs_mount_t *); 225 extern int xfs_qm_dqhashlock_nowait(xfs_dquot_t *); 226 227 /* system call interface */ 228 extern int xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t); 229 230 #ifdef DEBUG 231 extern int xfs_qm_internalqcheck(xfs_mount_t *); 232 #else 233 #define xfs_qm_internalqcheck(mp) (0) 234 #endif 235 236 #endif /* __XFS_QM_H__ */ 237