linux/fs/xfs/xfs_qm.h

// 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 …

#define XFS_IS_DQUOT_UNINITIALIZED(dqp) …

struct xfs_quota_limits { … };

/* Defaults for each quota type: time limits, warn limits, usage limits */
struct xfs_def_quota { … };

/*
 * Various quota information for individual filesystems.
 * The mount structure keeps a pointer to this.
 */
struct xfs_quotainfo { … };

static inline struct radix_tree_root *
xfs_dquot_tree(
	struct xfs_quotainfo	*qi,
	xfs_dqtype_t		type)
{ … }

static inline struct xfs_inode *
xfs_quota_inode(struct xfs_mount *mp, xfs_dqtype_t type)
{ … }

/*
 * 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 { … };

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 { … };
#define XFS_QM_TRANS_MAXDQS …
struct xfs_dquot_acct { … };

/*
 * Users are allowed to have a usage exceeding their softlimit for
 * a period this long.
 */
#define XFS_QM_BTIMELIMIT …
#define XFS_QM_RTBTIMELIMIT …
#define XFS_QM_ITIMELIMIT …

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)
{ … }

#endif /* __XFS_QM_H__ */