cregit-Linux how code gets into the kernel

Release 4.10 fs/xfs/xfs_qm.h

Directory: fs/xfs
/*
 * 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"

struct xfs_inode;

extern struct kmem_zone	*xfs_qm_dqtrxzone;

/*
 * Number of bmaps that we ask from bmapi when doing a quotacheck.
 * We make this restriction to keep the memory usage to a minimum.
 */

#define XFS_DQITER_MAP_SIZE	10


#define XFS_IS_DQUOT_UNINITIALIZED(dqp) ( \
        !dqp->q_core.d_blk_hardlimit && \
        !dqp->q_core.d_blk_softlimit && \
        !dqp->q_core.d_rtb_hardlimit && \
        !dqp->q_core.d_rtb_softlimit && \
        !dqp->q_core.d_ino_hardlimit && \
        !dqp->q_core.d_ino_softlimit && \
        !dqp->q_core.d_bcount && \
        !dqp->q_core.d_rtbcount && \
        !dqp->q_core.d_icount)

/*
 * 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


struct xfs_def_quota {
	
xfs_qcnt_t       bhardlimit;     /* default data blk hard limit */
	
xfs_qcnt_t       bsoftlimit;	 /* default data blk soft limit */
	
xfs_qcnt_t       ihardlimit;	 /* default inode count hard limit */
	
xfs_qcnt_t       isoftlimit;	 /* default inode count soft limit */
	
xfs_qcnt_t	 rtbhardlimit;   /* default realtime blk hard limit */
	
xfs_qcnt_t	 rtbsoftlimit;   /* default realtime blk soft limit */
};

/*
 * Various quota information for individual filesystems.
 * The mount structure keeps a pointer to this.
 */

typedef struct xfs_quotainfo {
	
struct radix_tree_root qi_uquota_tree;
	
struct radix_tree_root qi_gquota_tree;
	
struct radix_tree_root qi_pquota_tree;
	
struct mutex qi_tree_lock;
	
struct xfs_inode	*qi_uquotaip;	/* user quota inode */
	
struct xfs_inode	*qi_gquotaip;	/* group quota inode */
	
struct xfs_inode	*qi_pquotaip;	/* project quota inode */
	
struct list_lru	 qi_lru;
	
int		 qi_dquots;
	
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 */
	
struct xfs_def_quota	qi_usr_default;
	
struct xfs_def_quota	qi_grp_default;
	
struct xfs_def_quota	qi_prj_default;
	
struct shrinker  qi_shrinker;
} 
xfs_quotainfo_t;


static inline struct radix_tree_root * xfs_dquot_tree( struct xfs_quotainfo *qi, int type) { switch (type) { case XFS_DQ_USER: return &qi->qi_uquota_tree; case XFS_DQ_GROUP: return &qi->qi_gquota_tree; case XFS_DQ_PROJ: return &qi->qi_pquota_tree; default: ASSERT(0); } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
chandra seetharamanchandra seetharaman5491.53%266.67%
christoph hellwigchristoph hellwig58.47%133.33%
Total59100.00%3100.00%


static inline struct xfs_inode * xfs_quota_inode(xfs_mount_t *mp, uint dq_flags) { switch (dq_flags & XFS_DQ_ALLTYPES) { case XFS_DQ_USER: return mp->m_quotainfo->qi_uquotaip; case XFS_DQ_GROUP: return mp->m_quotainfo->qi_gquotaip; case XFS_DQ_PROJ: return mp->m_quotainfo->qi_pquotaip; default: ASSERT(0); } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
chandra seetharamanchandra seetharaman5485.71%266.67%
eric sandeeneric sandeen914.29%133.33%
Total63100.00%3100.00%

extern void xfs_trans_mod_dquot(struct xfs_trans *, struct xfs_dquot *, uint, long); extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, struct xfs_mount *, struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *, long, long, uint); extern void xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *); extern void xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *); /* * We keep the usr, grp, and prj 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. */ enum { XFS_QM_TRANS_USR = 0, XFS_QM_TRANS_GRP, XFS_QM_TRANS_PRJ, XFS_QM_TRANS_DQTYPES }; #define XFS_QM_TRANS_MAXDQS 2 struct xfs_dquot_acct { struct xfs_dqtrx dqs[XFS_QM_TRANS_DQTYPES][XFS_QM_TRANS_MAXDQS]; }; /* * 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(struct xfs_mount *); /* dquot stuff */ extern void xfs_qm_dqpurge_all(struct xfs_mount *, uint); extern void xfs_qm_dqrele_all_inodes(struct xfs_mount *, uint); /* quota ops */ extern int xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint); extern int xfs_qm_scall_getquota(struct xfs_mount *, xfs_dqid_t *, uint, struct qc_dqblk *, uint); extern int xfs_qm_scall_setqlim(struct xfs_mount *, xfs_dqid_t, uint, struct qc_dqblk *); extern int xfs_qm_scall_quotaon(struct xfs_mount *, uint); extern int xfs_qm_scall_quotaoff(struct xfs_mount *, uint);
static inline struct xfs_def_quota * xfs_get_defquota(struct xfs_dquot *dqp, struct xfs_quotainfo *qi) { struct xfs_def_quota *defq; if (XFS_QM_ISUDQ(dqp)) defq = &qi->qi_usr_default; else if (XFS_QM_ISGDQ(dqp)) defq = &qi->qi_grp_default; else { ASSERT(XFS_QM_ISPDQ(dqp)); defq = &qi->qi_prj_default; } return defq; }

Contributors

PersonTokensPropCommitsCommitProp
carlos maiolinocarlos maiolino74100.00%1100.00%
Total74100.00%1100.00%

#endif /* __XFS_QM_H__ */

Overall Contributors

PersonTokensPropCommitsCommitProp
christoph hellwigchristoph hellwig26042.83%830.77%
chandra seetharamanchandra seetharaman18129.82%519.23%
carlos maiolinocarlos maiolino11218.45%13.85%
nathan scottnathan scott142.31%311.54%
eric sandeeneric sandeen121.98%27.69%
jeff liujeff liu121.98%13.85%
stephen lordstephen lord60.99%13.85%
dave chinnerdave chinner50.82%27.69%
brian fosterbrian foster20.33%13.85%
jan karajan kara20.33%13.85%
john krueger* (same as john keller?)*john krueger* (same as john keller?)*10.16%13.85%
Total607100.00%26100.00%
Directory: fs/xfs
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