linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (c) 2000,2002,2005 Silicon Graphics, Inc.

 * All Rights Reserved.

 */

#ifndef __XFS_TRANS_PRIV_H__

#define __XFS_TRANS_PRIV_H__

​

struct xfs_log_item;

struct xfs_mount;

struct xfs_trans;

struct xfs_ail;

struct xfs_log_vec;

​

​

void    xfs_trans_init(struct xfs_mount *);

void    xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);

void    xfs_trans_del_item(struct xfs_log_item *);

void    xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,

                bool abort);

void    xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);

​

void    xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,

                xfs_lsn_t commit_lsn, int aborted);

/*

 * AIL traversal cursor.

 *

 * Rather than using a generation number for detecting changes in the ail, use

 * a cursor that is protected by the ail lock. The aild cursor exists in the

 * struct xfs_ail, but other traversals can declare it on the stack and link it

 * to the ail list.

 *

 * When an object is deleted from or moved int the AIL, the cursor list is

 * searched to see if the object is a designated cursor item. If it is, it is

 * deleted from the cursor so that the next time the cursor is used traversal

 * will return to the start.

 *

 * This means a traversal colliding with a removal will cause a restart of the

 * list scan, rather than any insertion or deletion anywhere in the list. The

 * low bit of the item pointer is set if the cursor has been invalidated so

 * that we can tell the difference between invalidation and reaching the end

 * of the list to trigger traversal restarts.

 */

struct xfs_ail_cursor {

    struct list_head    list;

    struct xfs_log_item *item;

};

​

/*

 * Private AIL structures.

 *

 * Eventually we need to drive the locking in here as well.

 */

struct xfs_ail {

    struct xfs_mount    *ail_mount;

    struct task_struct  *ail_task;

    struct list_head    ail_head;

    xfs_lsn_t       ail_target;

    xfs_lsn_t       ail_target_prev;

    struct list_head    ail_cursors;

    spinlock_t      ail_lock;

    xfs_lsn_t       ail_last_pushed_lsn;

    int         ail_log_flush;