104 lines · c
1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright (C) 2008 Oracle. All rights reserved.4 */5 6#ifndef BTRFS_TREE_LOG_H7#define BTRFS_TREE_LOG_H8 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 25623 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 code27 * that need to return an error (< 0 value), false (0) or true (1). Any negative28 * 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 btrfs_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 to49 * the log tree (full sync flag set or copy everything flag set) to50 * avoid allocating a temporary extent buffer while holding a lock on51 * an extent buffer of the subvolume tree and under the log transaction.52 * Also helps to avoid allocating and freeing a temporary extent buffer53 * 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 btrfs_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_record_new_subvolume(const struct btrfs_trans_handle *trans,98 struct btrfs_inode *dir);99void btrfs_log_new_name(struct btrfs_trans_handle *trans,100 struct dentry *old_dentry, struct btrfs_inode *old_dir,101 u64 old_dir_index, struct dentry *parent);102 103#endif104