delayed-inode.h (4360B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 2011 Fujitsu. All rights reserved. 4 * Written by Miao Xie <miaox@cn.fujitsu.com> 5 */ 6 7#ifndef BTRFS_DELAYED_INODE_H 8#define BTRFS_DELAYED_INODE_H 9 10#include <linux/rbtree.h> 11#include <linux/spinlock.h> 12#include <linux/mutex.h> 13#include <linux/list.h> 14#include <linux/wait.h> 15#include <linux/atomic.h> 16#include <linux/refcount.h> 17#include "ctree.h" 18 19/* types of the delayed item */ 20#define BTRFS_DELAYED_INSERTION_ITEM 1 21#define BTRFS_DELAYED_DELETION_ITEM 2 22 23struct btrfs_delayed_root { 24 spinlock_t lock; 25 struct list_head node_list; 26 /* 27 * Used for delayed nodes which is waiting to be dealt with by the 28 * worker. If the delayed node is inserted into the work queue, we 29 * drop it from this list. 30 */ 31 struct list_head prepare_list; 32 atomic_t items; /* for delayed items */ 33 atomic_t items_seq; /* for delayed items */ 34 int nodes; /* for delayed nodes */ 35 wait_queue_head_t wait; 36}; 37 38#define BTRFS_DELAYED_NODE_IN_LIST 0 39#define BTRFS_DELAYED_NODE_INODE_DIRTY 1 40#define BTRFS_DELAYED_NODE_DEL_IREF 2 41 42struct btrfs_delayed_node { 43 u64 inode_id; 44 u64 bytes_reserved; 45 struct btrfs_root *root; 46 /* Used to add the node into the delayed root's node list. */ 47 struct list_head n_list; 48 /* 49 * Used to add the node into the prepare list, the nodes in this list 50 * is waiting to be dealt with by the async worker. 51 */ 52 struct list_head p_list; 53 struct rb_root_cached ins_root; 54 struct rb_root_cached del_root; 55 struct mutex mutex; 56 struct btrfs_inode_item inode_item; 57 refcount_t refs; 58 u64 index_cnt; 59 unsigned long flags; 60 int count; 61}; 62 63struct btrfs_delayed_item { 64 struct rb_node rb_node; 65 struct btrfs_key key; 66 struct list_head tree_list; /* used for batch insert/delete items */ 67 struct list_head readdir_list; /* used for readdir items */ 68 u64 bytes_reserved; 69 struct btrfs_delayed_node *delayed_node; 70 refcount_t refs; 71 int ins_or_del; 72 u32 data_len; 73 char data[]; 74}; 75 76static inline void btrfs_init_delayed_root( 77 struct btrfs_delayed_root *delayed_root) 78{ 79 atomic_set(&delayed_root->items, 0); 80 atomic_set(&delayed_root->items_seq, 0); 81 delayed_root->nodes = 0; 82 spin_lock_init(&delayed_root->lock); 83 init_waitqueue_head(&delayed_root->wait); 84 INIT_LIST_HEAD(&delayed_root->node_list); 85 INIT_LIST_HEAD(&delayed_root->prepare_list); 86} 87 88int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, 89 const char *name, int name_len, 90 struct btrfs_inode *dir, 91 struct btrfs_disk_key *disk_key, u8 type, 92 u64 index); 93 94int btrfs_delete_delayed_dir_index(struct btrfs_trans_handle *trans, 95 struct btrfs_inode *dir, u64 index); 96 97int btrfs_inode_delayed_dir_index_count(struct btrfs_inode *inode); 98 99int btrfs_run_delayed_items(struct btrfs_trans_handle *trans); 100int btrfs_run_delayed_items_nr(struct btrfs_trans_handle *trans, int nr); 101 102void btrfs_balance_delayed_items(struct btrfs_fs_info *fs_info); 103 104int btrfs_commit_inode_delayed_items(struct btrfs_trans_handle *trans, 105 struct btrfs_inode *inode); 106/* Used for evicting the inode. */ 107void btrfs_remove_delayed_node(struct btrfs_inode *inode); 108void btrfs_kill_delayed_inode_items(struct btrfs_inode *inode); 109int btrfs_commit_inode_delayed_inode(struct btrfs_inode *inode); 110 111 112int btrfs_delayed_update_inode(struct btrfs_trans_handle *trans, 113 struct btrfs_root *root, 114 struct btrfs_inode *inode); 115int btrfs_fill_inode(struct inode *inode, u32 *rdev); 116int btrfs_delayed_delete_inode_ref(struct btrfs_inode *inode); 117 118/* Used for drop dead root */ 119void btrfs_kill_all_delayed_nodes(struct btrfs_root *root); 120 121/* Used for clean the transaction */ 122void btrfs_destroy_delayed_inodes(struct btrfs_fs_info *fs_info); 123 124/* Used for readdir() */ 125bool btrfs_readdir_get_delayed_items(struct inode *inode, 126 struct list_head *ins_list, 127 struct list_head *del_list); 128void btrfs_readdir_put_delayed_items(struct inode *inode, 129 struct list_head *ins_list, 130 struct list_head *del_list); 131int btrfs_should_delete_dir_index(struct list_head *del_list, 132 u64 index); 133int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, 134 struct list_head *ins_list); 135 136/* for init */ 137int __init btrfs_delayed_inode_init(void); 138void __cold btrfs_delayed_inode_exit(void); 139 140/* for debugging */ 141void btrfs_assert_delayed_root_empty(struct btrfs_fs_info *fs_info); 142 143#endif