// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_BUF_ITEM_H__
#define __XFS_BUF_ITEM_H__

/* kernel only definitions */

struct xfs_buf;
struct xfs_mount;

/* buf log item flags */
#define XFS_BLI_HOLD            (1u << 0)
#define XFS_BLI_DIRTY           (1u << 1)
#define XFS_BLI_STALE           (1u << 2)
#define XFS_BLI_LOGGED          (1u << 3)
#define XFS_BLI_INODE_ALLOC_BUF (1u << 4)
#define XFS_BLI_STALE_INODE     (1u << 5)
#define XFS_BLI_INODE_BUF       (1u << 6)
#define XFS_BLI_ORDERED         (1u << 7)

#define XFS_BLI_FLAGS \
        { XFS_BLI_HOLD,         "HOLD" }, \
        { XFS_BLI_DIRTY,        "DIRTY" }, \
        { XFS_BLI_STALE,        "STALE" }, \
        { XFS_BLI_LOGGED,       "LOGGED" }, \
        { XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
        { XFS_BLI_STALE_INODE,  "STALE_INODE" }, \
        { XFS_BLI_INODE_BUF,    "INODE_BUF" }, \
        { XFS_BLI_ORDERED,      "ORDERED" }

/*
 * This is the in core log item structure used to track information
 * needed to log buffers.  It tracks how many times the lock has been
 * locked, and which 128 byte chunks of the buffer are dirty.
 */
struct xfs_buf_log_item {
        struct xfs_log_item     bli_item;       /* common item structure */
        struct xfs_buf          *bli_buf;       /* real buffer pointer */
        unsigned int            bli_flags;      /* misc flags */
        unsigned int            bli_recur;      /* lock recursion count */
        atomic_t                bli_refcount;   /* cnt of tp refs */
        int                     bli_format_count;       /* count of headers */
        struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */
        struct xfs_buf_log_format __bli_format; /* embedded in-log header */
};

int     xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
void    xfs_buf_item_done(struct xfs_buf *bp);
void    xfs_buf_item_put(struct xfs_buf_log_item *bip);
void    xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
bool    xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
void    xfs_buf_inode_iodone(struct xfs_buf *);
#ifdef CONFIG_XFS_QUOTA
void    xfs_buf_dquot_iodone(struct xfs_buf *);
#else
static inline void xfs_buf_dquot_iodone(struct xfs_buf *bp)
{
}
#endif /* CONFIG_XFS_QUOTA */
void    xfs_buf_iodone(struct xfs_buf *);
bool    xfs_buf_log_check_iovec(struct kvec *iovec);

unsigned int xfs_buf_inval_log_space(unsigned int map_count,
                unsigned int blocksize);

extern struct kmem_cache        *xfs_buf_item_cache;

#endif  /* __XFS_BUF_ITEM_H__ */