/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2011 Fujitsu. All rights reserved. * Written by Miao Xie */ #ifndef BTRFS_DELAYED_INODE_H #define BTRFS_DELAYED_INODE_H #include #include #include #include #include #include #include #include #include #include "ctree.h" struct btrfs_disk_key; struct btrfs_fs_info; struct btrfs_inode; struct btrfs_root; struct btrfs_trans_handle; enum btrfs_delayed_item_type { BTRFS_DELAYED_INSERTION_ITEM, BTRFS_DELAYED_DELETION_ITEM }; 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_cached ins_root; struct rb_root_cached del_root; struct mutex mutex; struct btrfs_inode_item inode_item; refcount_t refs; int count; u64 index_cnt; unsigned long flags; /* * The size of the next batch of dir index items to insert (if this * node is from a directory inode). Protected by @mutex. */ u32 curr_index_batch_size; /* * Number of leaves reserved for inserting dir index items (if this * node belongs to a directory inode). This may be larger then the * actual number of leaves we end up using. Protected by @mutex. */ u32 index_item_leaves; }; struct btrfs_delayed_item { struct rb_node rb_node; /* Offset value of the corresponding dir index key. */ u64 index; struct list_head tree_list; /* used for batch insert/delete items */ struct list_head readdir_list; /* used for readdir items */ /* * Used when logging a directory. * Insertions and deletions to this list are protected by the parent * delayed node's mutex. */ struct list_head log_list; u64 bytes_reserved; struct btrfs_delayed_node *delayed_node; refcount_t refs; enum btrfs_delayed_item_type type:8; /* * Track if this delayed item was already logged. * Protected by the mutex of the parent delayed inode. */ bool logged; /* The maximum leaf size is 64K, so u16 is more than enough. */ u16 data_len; char data[] __counted_by(data_len); }; void btrfs_init_delayed_root(struct btrfs_delayed_root *delayed_root); int btrfs_insert_delayed_dir_index(struct btrfs_trans_handle *trans, const char *name, int name_len, struct btrfs_inode *dir, const struct btrfs_disk_key *disk_key, u8 flags, 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_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 btrfs_inode *inode, u64 last_index, struct list_head *ins_list, struct list_head *del_list); void btrfs_readdir_put_delayed_items(struct btrfs_inode *inode, struct list_head *ins_list, struct list_head *del_list); int btrfs_should_delete_dir_index(const struct list_head *del_list, u64 index); int btrfs_readdir_delayed_dir_index(struct dir_context *ctx, const struct list_head *ins_list); /* Used during directory logging. */ void btrfs_log_get_delayed_items(struct btrfs_inode *inode, struct list_head *ins_list, struct list_head *del_list); void btrfs_log_put_delayed_items(struct btrfs_inode *inode, struct list_head *ins_list, struct list_head *del_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