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linux/fs/xfs/xfs_quota.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

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2000-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_QUOTA_H__
#define __XFS_QUOTA_H__
#include "xfs_quota_defs.h"
/*
* Kernel only quota definitions and functions
*/
struct xfs_trans;
struct xfs_buf;
/*
* This check is done typically without holding the inode lock;
* that may seem racy, but it is harmless in the context that it is used.
* The inode cannot go inactive as long a reference is kept, and
* therefore if dquot(s) were attached, they'll stay consistent.
* If, for example, the ownership of the inode changes while
* we didn't have the inode locked, the appropriate dquot(s) will be
* attached atomically.
*/
#define XFS_NOT_DQATTACHED(mp, ip) \
((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
(XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
(XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
#define XFS_QM_NEED_QUOTACHECK(mp) \
((XFS_IS_UQUOTA_ON(mp) && \
(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
(XFS_IS_GQUOTA_ON(mp) && \
(mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
(XFS_IS_PQUOTA_ON(mp) && \
(mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
static inline uint
xfs_quota_chkd_flag(
xfs_dqtype_t type)
{
switch (type) {
case XFS_DQTYPE_USER:
return XFS_UQUOTA_CHKD;
case XFS_DQTYPE_GROUP:
return XFS_GQUOTA_CHKD;
case XFS_DQTYPE_PROJ:
return XFS_PQUOTA_CHKD;
default:
return 0;
}
}
/*
* The structure kept inside the xfs_trans_t keep track of dquot changes
* within a transaction and apply them later.
*/
struct xfs_dqtrx {
struct xfs_dquot *qt_dquot; /* the dquot this refers to */
uint64_t qt_blk_res; /* blks reserved on a dquot */
int64_t qt_bcount_delta; /* dquot blk count changes */
int64_t qt_delbcnt_delta; /* delayed dquot blk count changes */
uint64_t qt_rtblk_res; /* # blks reserved on a dquot */
uint64_t qt_rtblk_res_used;/* # blks used from reservation */
int64_t qt_rtbcount_delta;/* dquot realtime blk changes */
int64_t qt_delrtb_delta; /* delayed RT blk count changes */
uint64_t qt_ino_res; /* inode reserved on a dquot */
uint64_t qt_ino_res_used; /* inodes used from the reservation */
int64_t qt_icount_delta; /* dquot inode count changes */
};
enum xfs_apply_dqtrx_type {
XFS_APPLY_DQTRX_COMMIT = 0,
XFS_APPLY_DQTRX_UNRESERVE,
};
/*
* Parameters for applying dqtrx changes to a dquot. The hook function arg
* parameter is enum xfs_apply_dqtrx_type.
*/
struct xfs_apply_dqtrx_params {
uintptr_t tx_id;
xfs_ino_t ino;
xfs_dqtype_t q_type;
xfs_dqid_t q_id;
};
#ifdef CONFIG_XFS_QUOTA
extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
extern void xfs_trans_free_dqinfo(struct xfs_trans *);
extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
uint, int64_t);
extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
int64_t dblocks, int64_t rblocks, bool force);
extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
struct xfs_mount *, struct xfs_dquot *,
struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp,
struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
struct xfs_dquot *pdqp, int64_t dblocks);
extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
struct xfs_dquot **);
extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
extern int xfs_qm_dqattach(struct xfs_inode *);
extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
extern void xfs_qm_dqdetach(struct xfs_inode *);
extern void xfs_qm_dqrele(struct xfs_dquot *);
extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
extern void xfs_qm_mount_quotas(struct xfs_mount *);
extern void xfs_qm_unmount(struct xfs_mount *);
extern void xfs_qm_unmount_quotas(struct xfs_mount *);
static inline int
xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
{
return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
}
bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
# ifdef CONFIG_XFS_LIVE_HOOKS
void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip,
struct xfs_dquot *dqp, unsigned int field, int64_t delta);
struct xfs_quotainfo;
struct xfs_dqtrx_hook {
struct xfs_hook mod_hook;
struct xfs_hook apply_hook;
};
void xfs_dqtrx_hook_disable(void);
void xfs_dqtrx_hook_enable(void);
int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook);
void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn,
notifier_fn_t apply_fn);
# else
# define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \
xfs_trans_mod_dquot((tp), (dqp), (field), (delta))
# endif /* CONFIG_XFS_LIVE_HOOKS */
#else
static inline int
xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
prid_t prid, uint flags, struct xfs_dquot **udqp,
struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
{
*udqp = NULL;
*gdqp = NULL;
*pdqp = NULL;
return 0;
}
#define xfs_trans_dup_dqinfo(tp, tp2)
#define xfs_trans_free_dqinfo(tp)
static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp,
struct xfs_inode *ip, uint field, int64_t delta)
{
}
#define xfs_trans_apply_dquot_deltas(tp)
#define xfs_trans_unreserve_and_mod_dquots(tp)
static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
struct xfs_inode *ip, int64_t dblocks, int64_t rblocks,
bool force)
{
return 0;
}
static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
struct xfs_mount *mp, struct xfs_dquot *udqp,
struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
int64_t nblks, long nions, uint flags)
{
return 0;
}
static inline int
xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
{
return 0;
}
static inline int
xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
{
return 0;
}
#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
#define xfs_qm_vop_rename_dqattach(it) (0)
#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
#define xfs_qm_dqattach(ip) (0)
#define xfs_qm_dqattach_locked(ip, fl) (0)
#define xfs_qm_dqdetach(ip)
#define xfs_qm_dqrele(d) do { (d) = (d); } while(0)
#define xfs_qm_statvfs(ip, s) do { } while(0)
#define xfs_qm_newmount(mp, a, b) (0)
#define xfs_qm_mount_quotas(mp)
#define xfs_qm_unmount(mp)
#define xfs_qm_unmount_quotas(mp)
#define xfs_inode_near_dquot_enforcement(ip, type) (false)
# ifdef CONFIG_XFS_LIVE_HOOKS
# define xfs_dqtrx_hook_enable() ((void)0)
# define xfs_dqtrx_hook_disable() ((void)0)
# endif /* CONFIG_XFS_LIVE_HOOKS */
#endif /* CONFIG_XFS_QUOTA */
static inline int
xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks)
{
return xfs_quota_reserve_blkres(ip, -blocks);
}
extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
#endif /* __XFS_QUOTA_H__ */
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