linux/fs/ocfs2/quota.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * quota.h for OCFS2
 *
 * On disk quota structures for local and global quota file, in-memory
 * structures.
 *
 */

#ifndef _OCFS2_QUOTA_H
#define _OCFS2_QUOTA_H

#include <linux/types.h>
#include <linux/slab.h>
#include <linux/quota.h>
#include <linux/list.h>
#include <linux/dqblk_qtree.h>

#include "ocfs2.h"

/* Number of quota types we support */
#define OCFS2_MAXQUOTAS …

/*
 * In-memory structures
 */
struct ocfs2_dquot { … };

/* Description of one chunk to recover in memory */
struct ocfs2_recovery_chunk { … };

struct ocfs2_quota_recovery { … };

/* In-memory structure with quota header information */
struct ocfs2_mem_dqinfo { … };

static inline struct ocfs2_dquot *OCFS2_DQUOT(struct dquot *dquot)
{ … }

struct ocfs2_quota_chunk { … };

extern struct kmem_cache *ocfs2_dquot_cachep;
extern struct kmem_cache *ocfs2_qf_chunk_cachep;

extern const struct qtree_fmt_operations ocfs2_global_ops;

struct ocfs2_quota_recovery *ocfs2_begin_quota_recovery(
				struct ocfs2_super *osb, int slot_num);
int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
				struct ocfs2_quota_recovery *rec,
				int slot_num);
void ocfs2_free_quota_recovery(struct ocfs2_quota_recovery *rec);
ssize_t ocfs2_quota_read(struct super_block *sb, int type, char *data,
			 size_t len, loff_t off);
ssize_t ocfs2_quota_write(struct super_block *sb, int type,
			  const char *data, size_t len, loff_t off);
int ocfs2_global_read_info(struct super_block *sb, int type);
int ocfs2_global_write_info(struct super_block *sb, int type);
int ocfs2_global_read_dquot(struct dquot *dquot);
int __ocfs2_sync_dquot(struct dquot *dquot, int freeing);
static inline int ocfs2_sync_dquot(struct dquot *dquot)
{ … }
static inline int ocfs2_global_release_dquot(struct dquot *dquot)
{ … }

int ocfs2_lock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
void ocfs2_unlock_global_qf(struct ocfs2_mem_dqinfo *oinfo, int ex);
int ocfs2_validate_quota_block(struct super_block *sb, struct buffer_head *bh);
int ocfs2_read_quota_phys_block(struct inode *inode, u64 p_block,
				struct buffer_head **bh);
int ocfs2_create_local_dquot(struct dquot *dquot);
int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot);
int ocfs2_local_write_dquot(struct dquot *dquot);
void ocfs2_drop_dquot_refs(struct work_struct *work);

extern const struct dquot_operations ocfs2_quota_operations;
extern struct quota_format_type ocfs2_quota_format;

#endif /* _OCFS2_QUOTA_H */