| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2011 Fujitsu. All rights reserved. |
| * Written by Miao Xie <miaox@cn.fujitsu.com> |
| */ |
| |
| #ifndef BTRFS_DELAYED_INODE_H |
| #define BTRFS_DELAYED_INODE_H |
| |
| #include <linux/rbtree.h> |
| #include <linux/spinlock.h> |
| #include <linux/mutex.h> |
| #include <linux/list.h> |
| #include <linux/wait.h> |
| #include <linux/atomic.h> |
| #include <linux/refcount.h> |
| #include "ctree.h" |
| |
| /* types of the delayed item */ |
| #define BTRFS_DELAYED_INSERTION_ITEM 1 |
| #define BTRFS_DELAYED_DELETION_ITEM 2 |
| |
| struct btrfs_delayed_root { |
| spinlock_t lock; |
| struct list_head node_list; |
| /* |
| * Used for delayed nodes which is waiting to be dealt with by the |
| * worker. If the delayed node is inserted into the work queue, we |
| * drop it from this list. |
| */ |
| struct list_head prepare_list; |
| atomic_t items; /* for delayed items */ |
| atomic_t items_seq; /* for delayed items */ |
| int nodes; /* for delayed nodes */ |
| wait_queue_head_t wait; |
| }; |
| |
| #define BTRFS_DELAYED_NODE_IN_LIST 0 |
| #define BTRFS_DELAYED_NODE_INODE_DIRTY 1 |
| #define BTRFS_DELAYED_NODE_DEL_IREF 2 |
| |
| struct btrfs_delayed_node { |
| u64 inode_id; |
| u64 bytes_reserved; |
| struct btrfs_root *root; |
| /* Used to add the node into the delayed root's node list. */ |
| struct list_head n_list; |
| /* |
| * Used to add the node into the prepare list, the nodes in this list |
| * is waiting to be dealt with by the async worker. |
| */ |
| struct list_head p_list; |
| struct rb_root ins_root; |
| struct rb_root del_root; |
| struct mutex mutex; |
| struct btrfs_inode_item inode_item; |
| refcount_t refs; |
| u64 index_cnt; |
| unsigned long flags; |
| int count; |
| }; |
| |
| struct btrfs_delayed_item { |
| struct rb_node rb_node; |
| struct btrfs_key key; |
| struct list_head tree_list; /* used for batch insert/delete items */ |
| struct list_head readdir_list; /* used for readdir items */ |
| u64 bytes_reserved; |
| struct btrfs_delayed_node *delayed_node; |
| refcount_t refs; |
| int ins_or_del; |
| u32 data_len; |
| char data[0]; |
| }; |
| |
| static inline void btrfs_init_delayed_root( |
| struct btrfs_delayed_root *delayed_root) |
| { |
| atomic_set(&delayed_root->items, 0); |
| atomic_set(&delayed_root->items_seq, 0); |
| delayed_root->nodes = 0; |
| spin_lock_init(&delayed_root->lock); |
| init_waitqueue_head(&delayed_root->wait); |
| INIT_LIST_HEAD(&delayed_root->node_list); |
| INIT_LIST_HEAD(&delayed_root->prepare_list); |
| } |
| |
| int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, |
| const char *name, int name_len, |
| struct btrfs_inode *dir, |
| struct btrfs_disk_key *disk_key, u8 type, |
| u64 index); |
| |
| int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans, |
| struct btrfs_inode *dir, u64 index); |
| |
| int btrfs_inode_delayed_dir_index_count(struct btrfs_inode *inode); |
| |
| int btrfs_run_delayed_items(struct btrfs_trans_handle *trans); |
| int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, int nr); |
| |
| void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info); |
| |
| int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, |
| struct btrfs_inode *inode); |
| /* Used for evicting the inode. */ |
| void btrfs_remove_delayed_node(struct btrfs_inode *inode); |
| void btrfs_kill_delayed_inode_items(struct btrfs_inode *inode); |
| int btrfs_commit_inode_delayed_inode(struct btrfs_inode *inode); |
| |
| |
| int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, |
| struct btrfs_root *root, struct inode *inode); |
| int btrfs_fill_inode(struct inode *inode, u32 *rdev); |
| int btrfs_delayed_delete_inode_ref(struct btrfs_inode *inode); |
| |
| /* Used for drop dead root */ |
| void btrfs_kill_all_delayed_nodes(struct btrfs_root *root); |
| |
| /* Used for clean the transaction */ |
| void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info); |
| |
| /* Used for readdir() */ |
| bool btrfs_readdir_get_delayed_items(struct inode *inode, |
| struct list_head *ins_list, |
| struct list_head *del_list); |
| void btrfs_readdir_put_delayed_items(struct inode *inode, |
| struct list_head *ins_list, |
| struct list_head *del_list); |
| int btrfs_should_delete_dir_index(struct list_head *del_list, |
| u64 index); |
| int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, |
| struct list_head *ins_list); |
| |
| /* for init */ |
| int __init btrfs_delayed_inode_init(void); |
| void __cold btrfs_delayed_inode_exit(void); |
| |
| /* for debugging */ |
| void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info); |
| |
| #endif |