linux/fs/xfs/xfs_log.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef	__XFS_LOG_H__
#define __XFS_LOG_H__

struct xfs_cil_ctx;

struct xfs_log_vec { … };

#define XFS_LOG_VEC_ORDERED …

/*
 * Calculate the log iovec length for a given user buffer length. Intended to be
 * used by ->iop_size implementations when sizing buffers of arbitrary
 * alignments.
 */
static inline int
xlog_calc_iovec_len(int len)
{ … }

void *xlog_prepare_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
		uint type);

static inline void
xlog_finish_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec *vec,
		int data_len)
{ … }

/*
 * Copy the amount of data requested by the caller into a new log iovec.
 */
static inline void *
xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
		uint type, void *data, int len)
{ … }

static inline void *
xlog_copy_from_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
		const struct xfs_log_iovec *src)
{ … }

/*
 * By comparing each component, we don't have to worry about extra
 * endian issues in treating two 32 bit numbers as one 64 bit number
 */
static inline xfs_lsn_t	_lsn_cmp(xfs_lsn_t lsn1, xfs_lsn_t lsn2)
{ … }

#define XFS_LSN_CMP(x,y) …

/*
 * Flags to xfs_log_force()
 *
 *	XFS_LOG_SYNC:	Synchronous force in-core log to disk
 */
#define XFS_LOG_SYNC …

/* Log manager interfaces */
struct xfs_mount;
struct xlog_in_core;
struct xlog_ticket;
struct xfs_log_item;
struct xfs_item_ops;
struct xfs_trans;
struct xlog;

int	  xfs_log_force(struct xfs_mount *mp, uint flags);
int	  xfs_log_force_seq(struct xfs_mount *mp, xfs_csn_t seq, uint flags,
		int *log_forced);
int	  xfs_log_mount(struct xfs_mount	*mp,
			struct xfs_buftarg	*log_target,
			xfs_daddr_t		start_block,
			int		 	num_bblocks);
int	  xfs_log_mount_finish(struct xfs_mount *mp);
void	xfs_log_mount_cancel(struct xfs_mount *);
xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
void	xfs_log_space_wake(struct xfs_mount *mp);
int	xfs_log_reserve(struct xfs_mount *mp, int length, int count,
			struct xlog_ticket **ticket, bool permanent);
int	xfs_log_regrant(struct xfs_mount *mp, struct xlog_ticket *tic);
void	xfs_log_unmount(struct xfs_mount *mp);
bool	xfs_log_writable(struct xfs_mount *mp);

struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
void	  xfs_log_ticket_put(struct xlog_ticket *ticket);

void	xlog_cil_process_committed(struct list_head *list);
bool	xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);

void	xfs_log_work_queue(struct xfs_mount *mp);
int	xfs_log_quiesce(struct xfs_mount *mp);
void	xfs_log_clean(struct xfs_mount *mp);
bool	xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);

bool	  xlog_force_shutdown(struct xlog *log, uint32_t shutdown_flags);

int xfs_attr_use_log_assist(struct xfs_mount *mp);

#endif	/* __XFS_LOG_H__ */