1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 2008 Oracle. All rights reserved. 4 */ 5 6#ifndef BTRFS_TREE_LOG_H 7#define BTRFS_TREE_LOG_H 8 9#include <linux/list.h> 10#include <linux/fs.h> 11#include "messages.h" 12#include "ctree.h" 13#include "transaction.h" 14 15struct inode; 16struct dentry; 17struct btrfs_ordered_extent; 18struct btrfs_root; 19struct btrfs_trans_handle; 20 21/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */ 22#define BTRFS_NO_LOG_SYNC 256 23 24/* 25 * We can't use the tree log for whatever reason, force a transaction commit. 26 * We use a negative value because there are functions through the logging code 27 * that need to return an error (< 0 value), false (0) or true (1). Any negative 28 * value will do, as it will cause the log to be marked for a full sync. 29 */ 30#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1)) 31 32struct btrfs_log_ctx { 33 int log_ret; 34 int log_transid; 35 bool log_new_dentries; 36 bool logging_new_name; 37 bool logging_new_delayed_dentries; 38 /* Indicate if the inode being logged was logged before. */ 39 bool logged_before; 40 struct inode *inode; 41 struct list_head list; 42 /* Only used for fast fsyncs. */ 43 struct list_head ordered_extents; 44 struct list_head conflict_inodes; 45 int num_conflict_inodes; 46 bool logging_conflict_inodes; 47 /* 48 * Used for fsyncs that need to copy items from the subvolume tree to 49 * the log tree (full sync flag set or copy everything flag set) to 50 * avoid allocating a temporary extent buffer while holding a lock on 51 * an extent buffer of the subvolume tree and under the log transaction. 52 * Also helps to avoid allocating and freeing a temporary extent buffer 53 * in case we need to process multiple leaves from the subvolume tree. 54 */ 55 struct extent_buffer *scratch_eb; 56}; 57 58void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct inode *inode); 59void btrfs_init_log_ctx_scratch_eb(struct btrfs_log_ctx *ctx); 60void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx); 61 62static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 63{ 64 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 65} 66 67static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 68{ 69 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 70 trans->transid; 71} 72 73int btrfs_sync_log(struct btrfs_trans_handle *trans, 74 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 75int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 76int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 77 struct btrfs_fs_info *fs_info); 78int btrfs_recover_log_trees(struct btrfs_root *tree_root); 79int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 80 struct dentry *dentry, 81 struct btrfs_log_ctx *ctx); 82void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 83 struct btrfs_root *root, 84 const struct fscrypt_str *name, 85 struct btrfs_inode *dir, u64 index); 86void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 87 struct btrfs_root *root, 88 const struct fscrypt_str *name, 89 struct btrfs_inode *inode, u64 dirid); 90void btrfs_end_log_trans(struct btrfs_root *root); 91void btrfs_pin_log_trans(struct btrfs_root *root); 92void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 93 struct btrfs_inode *dir, struct btrfs_inode *inode, 94 bool for_rename); 95void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 96 struct btrfs_inode *dir); 97void btrfs_log_new_name(struct btrfs_trans_handle *trans, 98 struct dentry *old_dentry, struct btrfs_inode *old_dir, 99 u64 old_dir_index, struct dentry *parent); 100 101#endif 102