linux/fs/xfs/xfs_qm.h
Darrick J. Wong 200491875c xfs: track quota updates during live quotacheck
Create a shadow dqtrx system in the quotacheck code that hooks the
regular dquot counter update code.  This will be the means to keep our
copy of the dquot counters up to date while the scan runs in real time.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2024-02-22 12:30:55 -08:00

188 lines
5.0 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_QM_H__
#define __XFS_QM_H__
#include "xfs_dquot_item.h"
#include "xfs_dquot.h"
struct xfs_inode;
extern struct kmem_cache *xfs_dqtrx_cache;
/*
* 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_blk.hardlimit && \
!dqp->q_blk.softlimit && \
!dqp->q_rtb.hardlimit && \
!dqp->q_rtb.softlimit && \
!dqp->q_ino.hardlimit && \
!dqp->q_ino.softlimit && \
!dqp->q_blk.count && \
!dqp->q_rtb.count && \
!dqp->q_ino.count)
struct xfs_quota_limits {
xfs_qcnt_t hard; /* default hard limit */
xfs_qcnt_t soft; /* default soft limit */
time64_t time; /* limit for timers */
};
/* Defaults for each quota type: time limits, warn limits, usage limits */
struct xfs_def_quota {
struct xfs_quota_limits blk;
struct xfs_quota_limits ino;
struct xfs_quota_limits rtb;
};
/*
* Various quota information for individual filesystems.
* The mount structure keeps a pointer to this.
*/
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;
struct mutex qi_quotaofflock;/* to serialize quotaoff */
xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
uint qi_dqperchunk; /* # ondisk dq 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;
/* Minimum and maximum quota expiration timestamp values. */
time64_t qi_expiry_min;
time64_t qi_expiry_max;
/* Hook to feed quota counter updates to an active online repair. */
struct xfs_hooks qi_mod_ino_dqtrx_hooks;
struct xfs_hooks qi_apply_dqtrx_hooks;
};
static inline struct radix_tree_root *
xfs_dquot_tree(
struct xfs_quotainfo *qi,
xfs_dqtype_t type)
{
switch (type) {
case XFS_DQTYPE_USER:
return &qi->qi_uquota_tree;
case XFS_DQTYPE_GROUP:
return &qi->qi_gquota_tree;
case XFS_DQTYPE_PROJ:
return &qi->qi_pquota_tree;
default:
ASSERT(0);
}
return NULL;
}
static inline struct xfs_inode *
xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
{
switch (type) {
case XFS_DQTYPE_USER:
return mp->m_quotainfo->qi_uquotaip;
case XFS_DQTYPE_GROUP:
return mp->m_quotainfo->qi_gquotaip;
case XFS_DQTYPE_PROJ:
return mp->m_quotainfo->qi_pquotaip;
default:
ASSERT(0);
}
return NULL;
}
/*
* Parameters for tracking dqtrx changes on behalf of an inode. The hook
* function arg parameter is the field being updated.
*/
struct xfs_mod_ino_dqtrx_params {
uintptr_t tx_id;
xfs_ino_t ino;
xfs_dqtype_t q_type;
xfs_dqid_t q_id;
int64_t delta;
};
extern void xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
uint field, int64_t delta);
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 */
extern void xfs_qm_destroy_quotainfo(struct xfs_mount *);
/* quota ops */
extern int xfs_qm_scall_trunc_qfiles(struct xfs_mount *, uint);
extern int xfs_qm_scall_getquota(struct xfs_mount *mp,
xfs_dqid_t id,
xfs_dqtype_t type,
struct qc_dqblk *dst);
extern int xfs_qm_scall_getquota_next(struct xfs_mount *mp,
xfs_dqid_t *id,
xfs_dqtype_t type,
struct qc_dqblk *dst);
extern int xfs_qm_scall_setqlim(struct xfs_mount *mp,
xfs_dqid_t id,
xfs_dqtype_t type,
struct qc_dqblk *newlim);
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_quotainfo *qi, xfs_dqtype_t type)
{
switch (type) {
case XFS_DQTYPE_USER:
return &qi->qi_usr_default;
case XFS_DQTYPE_GROUP:
return &qi->qi_grp_default;
case XFS_DQTYPE_PROJ:
return &qi->qi_prj_default;
default:
ASSERT(0);
return NULL;
}
}
#endif /* __XFS_QM_H__ */