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

/* kernel only definitions */

struct xfs_buf;
struct xfs_bmbt_rec;
struct xfs_inode;
struct xfs_mount;

struct xfs_inode_log_item {
        struct xfs_log_item     ili_item;          /* common portion */
        struct xfs_inode        *ili_inode;        /* inode ptr */
        unsigned short          ili_lock_flags;    /* inode lock flags */
        unsigned int            ili_dirty_flags;   /* dirty in current tx */
        /*
         * The ili_lock protects the interactions between the dirty state and
         * the flush state of the inode log item. This allows us to do atomic
         * modifications of multiple state fields without having to hold a
         * specific inode lock to serialise them.
         *
         * We need atomic changes between inode dirtying, inode flushing and
         * inode completion, but these all hold different combinations of
         * ILOCK and IFLUSHING and hence we need some other method of
         * serialising updates to the flush state.
         */
        spinlock_t              ili_lock;          /* flush state lock */
        unsigned int            ili_last_fields;   /* fields when flushed */
        unsigned int            ili_fields;        /* fields to be logged */
        xfs_lsn_t               ili_flush_lsn;     /* lsn at last flush */

        /*
         * We record the sequence number for every inode modification, as
         * well as those that only require fdatasync operations for data
         * integrity. This allows optimisation of the O_DSYNC/fdatasync path
         * without needing to track what modifications the journal is currently
         * carrying for the inode. These are protected by the above ili_lock.
         */
        xfs_csn_t               ili_commit_seq;    /* last transaction commit */
        xfs_csn_t               ili_datasync_seq;  /* for datasync optimisation */
};

static inline int xfs_inode_clean(struct xfs_inode *ip)
{
        return !ip->i_itemp || !(ip->i_itemp->ili_fields & XFS_ILOG_ALL);
}

extern void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
extern void xfs_inode_item_destroy(struct xfs_inode *);
extern void xfs_iflush_abort(struct xfs_inode *);
extern void xfs_iflush_shutdown_abort(struct xfs_inode *);
int xfs_inode_item_format_convert(struct kvec *buf,
                struct xfs_inode_log_format *in_f);

extern struct kmem_cache        *xfs_ili_cache;

#endif  /* __XFS_INODE_ITEM_H__ */