linux-imx

/* SPDX-License-Identifier: GPL-2.0 */

/*

 * Copyright (C) 2007 Oracle.  All rights reserved.

 */

​

#ifndef BTRFS_INODE_H

#define BTRFS_INODE_H

​

#include <linux/hash.h>

#include "extent_map.h"

#include "extent_io.h"

#include "ordered-data.h"

#include "delayed-inode.h"

​

/*

 * ordered_data_close is set by truncate when a file that used

 * to have good data has been truncated to zero.  When it is set

 * the btrfs file release call will add this inode to the

 * ordered operations list so that we make sure to flush out any

 * new data the application may have written before commit.

 */

enum {

    BTRFS_INODE_ORDERED_DATA_CLOSE,

    BTRFS_INODE_DUMMY,

    BTRFS_INODE_IN_DEFRAG,

    BTRFS_INODE_HAS_ASYNC_EXTENT,

    BTRFS_INODE_NEEDS_FULL_SYNC,

    BTRFS_INODE_COPY_EVERYTHING,

    BTRFS_INODE_IN_DELALLOC_LIST,

    BTRFS_INODE_READDIO_NEED_LOCK,

    BTRFS_INODE_HAS_PROPS,

    BTRFS_INODE_SNAPSHOT_FLUSH,

};

​

/* in memory btrfs inode */

struct btrfs_inode {

    /* which subvolume this inode belongs to */

    struct btrfs_root *root;

​

    /* key used to find this inode on disk.  This is used by the code

     * to read in roots of subvolumes

     */

    struct btrfs_key location;

​

    /*

     * Lock for counters and all fields used to determine if the inode is in

     * the log or not (last_trans, last_sub_trans, last_log_commit,

     * logged_trans).

     */

    spinlock_t lock;

​

    /* the extent_tree has caches of all the extent mappings to disk */

    struct extent_map_tree extent_tree;

​

    /* the io_tree does range state (DIRTY, LOCKED etc) */

    struct extent_io_tree io_tree;

​

    /* special utility tree used to record which mirrors have already been

     * tried when checksums fail for a given block

     */

    struct extent_io_tree io_failure_tree;

​

    /* held while logging the inode in tree-log.c */

    struct mutex log_mutex;

​

    /* held while doing delalloc reservations */

    struct mutex delalloc_mutex;

​

    /* used to order data wrt metadata */

    struct btrfs_ordered_inode_tree ordered_tree;

​

    /* list of all the delalloc inodes in the FS.  There are times we need

     * to write all the delalloc pages to disk, and this list is used

     * to walk them all.

     */

    struct list_head delalloc_inodes;

​

    /* node for the red-black tree that links inodes in subvolume root */

    struct rb_node rb_node;

​

    unsigned long runtime_flags;

​

    /* Keep track of who's O_SYNC/fsyncing currently */

    atomic_t sync_writers;

​

    /* full 64 bit generation number, struct vfs_inode doesn't have a big

     * enough field for this.

     */

    u64 generation;

​

    /*

     * transid of the trans_handle that last modified this inode