quotaops.h | Explore in Territory

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Definitions for diskquota-operations. When diskquota is configured these
 * macros expand to the right source-code.
 *
 * Author:  Marco van Wieringen <[email protected]>
 */
#ifndef _LINUX_QUOTAOPS_
#define _LINUX_QUOTAOPS_

#include <linux/fs.h>

#define DQUOT_SPACE_WARN …
#define DQUOT_SPACE_RESERVE …
#define DQUOT_SPACE_NOFAIL …

static inline struct quota_info *sb_dqopt(struct super_block *sb)
{ … }

/* i_mutex must being held */
static inline bool is_quota_modification(struct mnt_idmap *idmap,
					 struct inode *inode, struct iattr *ia)
{ … }

#if defined(CONFIG_QUOTA)

#define quota_error(sb, fmt, args...) …

extern __printf(3, 4)
void __quota_error(struct super_block *sb, const char *func,
		   const char *fmt, ...);

/*
 * declaration of quota_function calls in kernel.
 */
int dquot_initialize(struct inode *inode);
bool dquot_initialize_needed(struct inode *inode);
void dquot_drop(struct inode *inode);
struct dquot *dqget(struct super_block *sb, struct kqid qid);
static inline struct dquot *dqgrab(struct dquot *dquot)
{ … }

static inline bool dquot_is_busy(struct dquot *dquot)
{ … }

void dqput(struct dquot *dquot);
int dquot_scan_active(struct super_block *sb,
		      int (*fn)(struct dquot *dquot, unsigned long priv),
		      unsigned long priv);
struct dquot *dquot_alloc(struct super_block *sb, int type);
void dquot_destroy(struct dquot *dquot);

int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags);
void __dquot_free_space(struct inode *inode, qsize_t number, int flags);

int dquot_alloc_inode(struct inode *inode);

void dquot_claim_space_nodirty(struct inode *inode, qsize_t number);
void dquot_free_inode(struct inode *inode);
void dquot_reclaim_space_nodirty(struct inode *inode, qsize_t number);

int dquot_disable(struct super_block *sb, int type, unsigned int flags);
/* Suspend quotas on remount RO */
static inline int dquot_suspend(struct super_block *sb, int type)
{ … }
int dquot_resume(struct super_block *sb, int type);

int dquot_commit(struct dquot *dquot);
int dquot_acquire(struct dquot *dquot);
int dquot_release(struct dquot *dquot);
int dquot_commit_info(struct super_block *sb, int type);
int dquot_get_next_id(struct super_block *sb, struct kqid *qid);
int dquot_mark_dquot_dirty(struct dquot *dquot);

int dquot_file_open(struct inode *inode, struct file *file);

int dquot_load_quota_sb(struct super_block *sb, int type, int format_id,
	unsigned int flags);
int dquot_load_quota_inode(struct inode *inode, int type, int format_id,
	unsigned int flags);
int dquot_quota_on(struct super_block *sb, int type, int format_id,
	const struct path *path);
int dquot_quota_on_mount(struct super_block *sb, char *qf_name,
 	int format_id, int type);
int dquot_quota_off(struct super_block *sb, int type);
int dquot_writeback_dquots(struct super_block *sb, int type);
int dquot_quota_sync(struct super_block *sb, int type);
int dquot_get_state(struct super_block *sb, struct qc_state *state);
int dquot_set_dqinfo(struct super_block *sb, int type, struct qc_info *ii);
int dquot_get_dqblk(struct super_block *sb, struct kqid id,
		struct qc_dqblk *di);
int dquot_get_next_dqblk(struct super_block *sb, struct kqid *id,
		struct qc_dqblk *di);
int dquot_set_dqblk(struct super_block *sb, struct kqid id,
		struct qc_dqblk *di);

int __dquot_transfer(struct inode *inode, struct dquot **transfer_to);
int dquot_transfer(struct mnt_idmap *idmap, struct inode *inode,
		   struct iattr *iattr);

static inline struct mem_dqinfo *sb_dqinfo(struct super_block *sb, int type)
{ … }

/*
 * Functions for checking status of quota
 */

static inline bool sb_has_quota_usage_enabled(struct super_block *sb, int type)
{ … }

static inline bool sb_has_quota_limits_enabled(struct super_block *sb, int type)
{ … }

static inline bool sb_has_quota_suspended(struct super_block *sb, int type)
{ … }

static inline unsigned sb_any_quota_suspended(struct super_block *sb)
{ … }

/* Does kernel know about any quota information for given sb + type? */
static inline bool sb_has_quota_loaded(struct super_block *sb, int type)
{ … }

static inline unsigned sb_any_quota_loaded(struct super_block *sb)
{ … }

static inline bool sb_has_quota_active(struct super_block *sb, int type)
{ … }

/*
 * Operations supported for diskquotas.
 */
extern const struct dquot_operations dquot_operations;
extern const struct quotactl_ops dquot_quotactl_sysfile_ops;

#else

static inline int sb_has_quota_usage_enabled(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_has_quota_limits_enabled(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_has_quota_suspended(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_any_quota_suspended(struct super_block *sb)
{
	return 0;
}

/* Does kernel know about any quota information for given sb + type? */
static inline int sb_has_quota_loaded(struct super_block *sb, int type)
{
	return 0;
}

static inline int sb_any_quota_loaded(struct super_block *sb)
{
	return 0;
}

static inline int sb_has_quota_active(struct super_block *sb, int type)
{
	return 0;
}

static inline int dquot_initialize(struct inode *inode)
{
	return 0;
}

static inline bool dquot_initialize_needed(struct inode *inode)
{
	return false;
}

static inline void dquot_drop(struct inode *inode)
{
}

static inline int dquot_alloc_inode(struct inode *inode)
{
	return 0;
}

static inline void dquot_free_inode(struct inode *inode)
{
}

static inline int dquot_transfer(struct mnt_idmap *idmap,
				 struct inode *inode, struct iattr *iattr)
{
	return 0;
}

static inline int __dquot_alloc_space(struct inode *inode, qsize_t number,
		int flags)
{
	if (!(flags & DQUOT_SPACE_RESERVE))
		inode_add_bytes(inode, number);
	return 0;
}

static inline void __dquot_free_space(struct inode *inode, qsize_t number,
		int flags)
{
	if (!(flags & DQUOT_SPACE_RESERVE))
		inode_sub_bytes(inode, number);
}

static inline void dquot_claim_space_nodirty(struct inode *inode, qsize_t number)
{
	inode_add_bytes(inode, number);
}

static inline int dquot_reclaim_space_nodirty(struct inode *inode,
					      qsize_t number)
{
	inode_sub_bytes(inode, number);
	return 0;
}

static inline int dquot_disable(struct super_block *sb, int type,
		unsigned int flags)
{
	return 0;
}

static inline int dquot_suspend(struct super_block *sb, int type)
{
	return 0;
}

static inline int dquot_resume(struct super_block *sb, int type)
{
	return 0;
}

#define dquot_file_open …

static inline int dquot_writeback_dquots(struct super_block *sb, int type)
{
	return 0;
}

#endif /* CONFIG_QUOTA */

static inline int dquot_alloc_space_nodirty(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_alloc_space_nofail(struct inode *inode, qsize_t nr)
{ … }

static inline int dquot_alloc_space(struct inode *inode, qsize_t nr)
{ … }

static inline int dquot_alloc_block_nodirty(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_alloc_block_nofail(struct inode *inode, qsize_t nr)
{ … }

static inline int dquot_alloc_block(struct inode *inode, qsize_t nr)
{ … }

static inline int dquot_prealloc_block_nodirty(struct inode *inode, qsize_t nr)
{ … }

static inline int dquot_prealloc_block(struct inode *inode, qsize_t nr)
{ … }

static inline int dquot_reserve_block(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_claim_block(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_reclaim_block(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_free_space_nodirty(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_free_space(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_free_block_nodirty(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_free_block(struct inode *inode, qsize_t nr)
{ … }

static inline void dquot_release_reservation_block(struct inode *inode,
		qsize_t nr)
{ … }

unsigned int qtype_enforce_flag(int type);

#endif /* _LINUX_QUOTAOPS_ */
linux/include/linux/quotaops.h
