197 строки
6.2 KiB
C
197 строки
6.2 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_QM_H__
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#define __XFS_QM_H__
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#include "xfs_dquot_item.h"
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#include "xfs_dquot.h"
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struct xfs_inode;
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extern struct kmem_zone *xfs_qm_dqtrxzone;
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/*
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* Number of bmaps that we ask from bmapi when doing a quotacheck.
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* We make this restriction to keep the memory usage to a minimum.
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*/
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#define XFS_DQITER_MAP_SIZE 10
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#define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
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!dqp->q_core.d_blk_hardlimit && \
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!dqp->q_core.d_blk_softlimit && \
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!dqp->q_core.d_rtb_hardlimit && \
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!dqp->q_core.d_rtb_softlimit && \
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!dqp->q_core.d_ino_hardlimit && \
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!dqp->q_core.d_ino_softlimit && \
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!dqp->q_core.d_bcount && \
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!dqp->q_core.d_rtbcount && \
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!dqp->q_core.d_icount)
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/*
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* This defines the unit of allocation of dquots.
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* Currently, it is just one file system block, and a 4K blk contains 30
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* (136 * 30 = 4080) dquots. It's probably not worth trying to make
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* this more dynamic.
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* XXXsup However, if this number is changed, we have to make sure that we don't
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* implicitly assume that we do allocations in chunks of a single filesystem
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* block in the dquot/xqm code.
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*/
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#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
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struct xfs_def_quota {
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xfs_qcnt_t bhardlimit; /* default data blk hard limit */
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xfs_qcnt_t bsoftlimit; /* default data blk soft limit */
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xfs_qcnt_t ihardlimit; /* default inode count hard limit */
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xfs_qcnt_t isoftlimit; /* default inode count soft limit */
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xfs_qcnt_t rtbhardlimit; /* default realtime blk hard limit */
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xfs_qcnt_t rtbsoftlimit; /* default realtime blk soft limit */
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};
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/*
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* Various quota information for individual filesystems.
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* The mount structure keeps a pointer to this.
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*/
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typedef struct xfs_quotainfo {
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struct radix_tree_root qi_uquota_tree;
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struct radix_tree_root qi_gquota_tree;
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struct radix_tree_root qi_pquota_tree;
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struct mutex qi_tree_lock;
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struct xfs_inode *qi_uquotaip; /* user quota inode */
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struct xfs_inode *qi_gquotaip; /* group quota inode */
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struct xfs_inode *qi_pquotaip; /* project quota inode */
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struct list_lru qi_lru;
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int qi_dquots;
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time_t qi_btimelimit; /* limit for blks timer */
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time_t qi_itimelimit; /* limit for inodes timer */
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time_t qi_rtbtimelimit;/* limit for rt blks timer */
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xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
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xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
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xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
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struct mutex qi_quotaofflock;/* to serialize quotaoff */
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xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
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uint qi_dqperchunk; /* # ondisk dqs in above chunk */
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struct xfs_def_quota qi_usr_default;
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struct xfs_def_quota qi_grp_default;
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struct xfs_def_quota qi_prj_default;
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struct shrinker qi_shrinker;
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} xfs_quotainfo_t;
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static inline struct radix_tree_root *
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xfs_dquot_tree(
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struct xfs_quotainfo *qi,
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int type)
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{
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switch (type) {
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case XFS_DQ_USER:
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return &qi->qi_uquota_tree;
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case XFS_DQ_GROUP:
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return &qi->qi_gquota_tree;
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case XFS_DQ_PROJ:
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return &qi->qi_pquota_tree;
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default:
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ASSERT(0);
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}
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return NULL;
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}
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static inline struct xfs_inode *
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xfs_quota_inode(xfs_mount_t *mp, uint dq_flags)
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{
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switch (dq_flags & XFS_DQ_ALLTYPES) {
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case XFS_DQ_USER:
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return mp->m_quotainfo->qi_uquotaip;
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case XFS_DQ_GROUP:
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return mp->m_quotainfo->qi_gquotaip;
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case XFS_DQ_PROJ:
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return mp->m_quotainfo->qi_pquotaip;
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default:
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ASSERT(0);
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}
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return NULL;
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}
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extern void xfs_trans_mod_dquot(struct xfs_trans *,
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struct xfs_dquot *, uint, long);
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extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
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struct xfs_mount *, struct xfs_dquot *,
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struct xfs_dquot *, struct xfs_dquot *,
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long, long, uint);
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extern void xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
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extern void xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
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/*
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* We keep the usr, grp, and prj dquots separately so that locking will be
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* easier to do at commit time. All transactions that we know of at this point
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* affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
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*/
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enum {
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XFS_QM_TRANS_USR = 0,
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XFS_QM_TRANS_GRP,
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XFS_QM_TRANS_PRJ,
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XFS_QM_TRANS_DQTYPES
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};
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#define XFS_QM_TRANS_MAXDQS 2
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struct xfs_dquot_acct {
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struct xfs_dqtrx dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS];
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};
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/*
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* Users are allowed to have a usage exceeding their softlimit for
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* a period this long.
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*/
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#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
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#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
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#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
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#define XFS_QM_BWARNLIMIT 5
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#define XFS_QM_IWARNLIMIT 5
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#define XFS_QM_RTBWARNLIMIT 5
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extern void xfs_qm_destroy_quotainfo(struct xfs_mount *);
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/* dquot stuff */
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extern void xfs_qm_dqpurge_all(struct xfs_mount *, uint);
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extern void xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint);
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/* quota ops */
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extern int xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
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extern int xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t *,
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uint, struct qc_dqblk *, uint);
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extern int xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint,
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struct qc_dqblk *);
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extern int xfs_qm_scall_quotaon(struct xfs_mount *, uint);
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extern int xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
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static inline struct xfs_def_quota *
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xfs_get_defquota(struct xfs_dquot *dqp, struct xfs_quotainfo *qi)
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{
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struct xfs_def_quota *defq;
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if (XFS_QM_ISUDQ(dqp))
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defq = &qi->qi_usr_default;
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else if (XFS_QM_ISGDQ(dqp))
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defq = &qi->qi_grp_default;
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else {
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ASSERT(XFS_QM_ISPDQ(dqp));
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defq = &qi->qi_prj_default;
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}
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return defq;
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}
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#endif /* __XFS_QM_H__ */
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