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Diffstat (limited to 'fs/xfs/xfs_qm.h')
| -rw-r--r-- | fs/xfs/xfs_qm.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h new file mode 100644 index 0000000..43b9abe --- /dev/null +++ b/fs/xfs/xfs_qm.h @@ -0,0 +1,166 @@ +/* + * Copyright (c) 2000-2005 Silicon Graphics, Inc. + * All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ +#ifndef __XFS_QM_H__ +#define __XFS_QM_H__ + +#include "xfs_dquot_item.h" +#include "xfs_dquot.h" +#include "xfs_quota_priv.h" +#include "xfs_qm_stats.h" + +struct xfs_qm; +struct xfs_inode; + +extern uint ndquot; +extern struct mutex xfs_Gqm_lock; +extern struct xfs_qm *xfs_Gqm; +extern kmem_zone_t *qm_dqzone; +extern kmem_zone_t *qm_dqtrxzone; + +/* + * Used in xfs_qm_sync called by xfs_sync to count the max times that it can + * iterate over the mountpt's dquot list in one call. + */ +#define XFS_QM_SYNC_MAX_RESTARTS 7 + +/* + * Ditto, for xfs_qm_dqreclaim_one. + */ +#define XFS_QM_RECLAIM_MAX_RESTARTS 4 + +/* + * Ideal ratio of free to in use dquots. Quota manager makes an attempt + * to keep this balance. + */ +#define XFS_QM_DQFREE_RATIO 2 + +/* + * Dquot hashtable constants/threshold values. + */ +#define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t)) +#define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t)) + +/* + * This defines the unit of allocation of dquots. + * Currently, it is just one file system block, and a 4K blk contains 30 + * (136 * 30 = 4080) dquots. It's probably not worth trying to make + * this more dynamic. + * XXXsup However, if this number is changed, we have to make sure that we don't + * implicitly assume that we do allocations in chunks of a single filesystem + * block in the dquot/xqm code. + */ +#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1 + +typedef xfs_dqhash_t xfs_dqlist_t; + +/* + * Quota Manager (global) structure. Lives only in core. + */ +typedef struct xfs_qm { + xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */ + xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */ + uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */ + struct list_head qm_dqfrlist; /* freelist of dquots */ + struct mutex qm_dqfrlist_lock; + int qm_dqfrlist_cnt; + atomic_t qm_totaldquots; /* total incore dquots */ + uint qm_nrefs; /* file systems with quota on */ + int qm_dqfree_ratio;/* ratio of free to inuse dquots */ + kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */ + kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */ +} xfs_qm_t; + +/* + * Various quota information for individual filesystems. + * The mount structure keeps a pointer to this. + */ +typedef struct xfs_quotainfo { + xfs_inode_t *qi_uquotaip; /* user quota inode */ + xfs_inode_t *qi_gquotaip; /* group quota inode */ + struct list_head qi_dqlist; /* all dquots in filesys */ + struct mutex qi_dqlist_lock; + int qi_dquots; + int qi_dqreclaims; /* a change here indicates + a removal in the dqlist */ + time_t qi_btimelimit; /* limit for blks timer */ + time_t qi_itimelimit; /* limit for inodes timer */ + time_t qi_rtbtimelimit;/* limit for rt blks timer */ + xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */ + xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */ + xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */ + struct mutex qi_quotaofflock;/* to serialize quotaoff */ + xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */ + uint qi_dqperchunk; /* # ondisk dqs in above chunk */ + xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */ + xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */ + xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */ + xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */ + xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */ + xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */ +} xfs_quotainfo_t; + + +extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long); +extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *, + xfs_dquot_t *, xfs_dquot_t *, long, long, uint); +extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *); +extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *); + +/* + * We keep the usr and grp dquots separately so that locking will be easier + * to do at commit time. All transactions that we know of at this point + * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value. + */ +#define XFS_QM_TRANS_MAXDQS 2 +typedef struct xfs_dquot_acct { + xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS]; + xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS]; +} xfs_dquot_acct_t; + +/* + * Users are allowed to have a usage exceeding their softlimit for + * a period this long. + */ +#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */ +#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */ +#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */ + +#define XFS_QM_BWARNLIMIT 5 +#define XFS_QM_IWARNLIMIT 5 +#define XFS_QM_RTBWARNLIMIT 5 + +extern void xfs_qm_destroy_quotainfo(xfs_mount_t *); +extern int xfs_qm_quotacheck(xfs_mount_t *); +extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t); + +/* dquot stuff */ +extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **); +extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint); +extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint); + +/* quota ops */ +extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint); +extern int xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint, + fs_disk_quota_t *); +extern int xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint, + fs_disk_quota_t *); +extern int xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *); +extern int xfs_qm_scall_quotaon(xfs_mount_t *, uint); +extern int xfs_qm_scall_quotaoff(xfs_mount_t *, uint); + +#endif /* __XFS_QM_H__ */ |