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 "ctree.h" 10 #include "transaction.h" 11 12 /* return value for btrfs_log_dentry_safe that means we don't need to log it at all */ 13 #define BTRFS_NO_LOG_SYNC 256 14 15 struct btrfs_log_ctx { 16 int log_ret; 17 int log_transid; 18 bool log_new_dentries; 19 struct inode *inode; 20 struct list_head list; 21 }; 22 23 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 24 struct inode *inode) 25 { 26 ctx->log_ret = 0; 27 ctx->log_transid = 0; 28 ctx->log_new_dentries = false; 29 ctx->inode = inode; 30 INIT_LIST_HEAD(&ctx->list); 31 } 32 33 static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info, 34 struct btrfs_trans_handle *trans) 35 { 36 WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid); 37 } 38 39 static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info, 40 struct btrfs_trans_handle *trans) 41 { 42 return READ_ONCE(fs_info->last_trans_log_full_commit) == 43 trans->transid; 44 } 45 46 int btrfs_sync_log(struct btrfs_trans_handle *trans, 47 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 48 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 49 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 50 struct btrfs_fs_info *fs_info); 51 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 52 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 53 struct dentry *dentry, 54 const loff_t start, 55 const loff_t end, 56 struct btrfs_log_ctx *ctx); 57 int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 58 struct btrfs_root *root, 59 const char *name, int name_len, 60 struct btrfs_inode *dir, u64 index); 61 int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 62 struct btrfs_root *root, 63 const char *name, int name_len, 64 struct btrfs_inode *inode, u64 dirid); 65 void btrfs_end_log_trans(struct btrfs_root *root); 66 void btrfs_pin_log_trans(struct btrfs_root *root); 67 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 68 struct btrfs_inode *dir, struct btrfs_inode *inode, 69 int for_rename); 70 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 71 struct btrfs_inode *dir); 72 /* Return values for btrfs_log_new_name() */ 73 enum { 74 BTRFS_DONT_NEED_TRANS_COMMIT, 75 BTRFS_NEED_TRANS_COMMIT, 76 BTRFS_DONT_NEED_LOG_SYNC, 77 BTRFS_NEED_LOG_SYNC, 78 }; 79 int btrfs_log_new_name(struct btrfs_trans_handle *trans, 80 struct btrfs_inode *inode, struct btrfs_inode *old_dir, 81 struct dentry *parent, 82 bool sync_log, struct btrfs_log_ctx *ctx); 83 84 #endif 85