linux/fs/xfs/xfs_qm.h
Arnd Bergmann b8a0880a37 xfs: quota: move to time64_t interfaces
As a preparation for removing the 32-bit time_t type and
all associated interfaces, change xfs to use time64_t and
ktime_get_real_seconds() for the quota housekeeping.

This avoids one difference between 32-bit and 64-bit kernels,
raising the theoretical limit for the quota grace period
to year 2106 on 32-bit instead of year 2038.

Note that common user space tools using the XFS quotactl
interface instead of the generic one still use the y2038
dates.

To fix quotas properly, both the on-disk format and user
space still need to be changed.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2020-01-06 08:57:37 -08:00

183 lines
5.5 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_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.
*/
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;
time64_t qi_btimelimit; /* limit for blks timer */
time64_t qi_itimelimit; /* limit for inodes timer */
time64_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;
};
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;
}
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;
}
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 */
#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 *);
extern int xfs_qm_scall_getquota_next(struct xfs_mount *,
xfs_dqid_t *, uint, struct qc_dqblk *);
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;
}
#endif /* __XFS_QM_H__ */