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 15 struct inode; 16 struct dentry; 17 struct btrfs_ordered_extent; 18 struct btrfs_root; 19 struct 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 32 struct 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 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 58 void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct btrfs_inode *inode); 59 void btrfs_init_log_ctx_scratch_eb(struct btrfs_log_ctx *ctx); 60 void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx); 61 btrfs_set_log_full_commit(struct btrfs_trans_handle * trans)62 static 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 btrfs_need_log_full_commit(struct btrfs_trans_handle * trans)67 static 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 73 int btrfs_sync_log(struct btrfs_trans_handle *trans, 74 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 75 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 76 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 77 struct btrfs_fs_info *fs_info); 78 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 79 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 80 struct dentry *dentry, 81 struct btrfs_log_ctx *ctx); 82 void 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); 86 void 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); 90 void btrfs_end_log_trans(struct btrfs_root *root); 91 void btrfs_pin_log_trans(struct btrfs_root *root); 92 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 93 struct btrfs_inode *dir, struct btrfs_inode *inode, 94 bool for_rename); 95 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 96 struct btrfs_inode *dir); 97 void btrfs_record_new_subvolume(const struct btrfs_trans_handle *trans, 98 struct btrfs_inode *dir); 99 void 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 #endif 104