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 bool logging_new_name; 20 /* Tracks the last logged dir item/index key offset. */ 21 u64 last_dir_item_offset; 22 struct inode *inode; 23 struct list_head list; 24 /* Only used for fast fsyncs. */ 25 struct list_head ordered_extents; 26 }; 27 28 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 29 struct inode *inode) 30 { 31 ctx->log_ret = 0; 32 ctx->log_transid = 0; 33 ctx->log_new_dentries = false; 34 ctx->logging_new_name = false; 35 ctx->inode = inode; 36 INIT_LIST_HEAD(&ctx->list); 37 INIT_LIST_HEAD(&ctx->ordered_extents); 38 } 39 40 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx) 41 { 42 struct btrfs_ordered_extent *ordered; 43 struct btrfs_ordered_extent *tmp; 44 45 ASSERT(inode_is_locked(ctx->inode)); 46 47 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) { 48 list_del_init(&ordered->log_list); 49 btrfs_put_ordered_extent(ordered); 50 } 51 } 52 53 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 54 { 55 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 56 } 57 58 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 59 { 60 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 61 trans->transid; 62 } 63 64 int btrfs_sync_log(struct btrfs_trans_handle *trans, 65 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 66 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 67 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 68 struct btrfs_fs_info *fs_info); 69 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 70 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 71 struct dentry *dentry, 72 struct btrfs_log_ctx *ctx); 73 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 74 struct btrfs_root *root, 75 const char *name, int name_len, 76 struct btrfs_inode *dir, u64 index); 77 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 78 struct btrfs_root *root, 79 const char *name, int name_len, 80 struct btrfs_inode *inode, u64 dirid); 81 void btrfs_end_log_trans(struct btrfs_root *root); 82 void btrfs_pin_log_trans(struct btrfs_root *root); 83 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 84 struct btrfs_inode *dir, struct btrfs_inode *inode, 85 int for_rename); 86 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 87 struct btrfs_inode *dir); 88 void btrfs_log_new_name(struct btrfs_trans_handle *trans, 89 struct btrfs_inode *inode, struct btrfs_inode *old_dir, 90 struct dentry *parent); 91 92 #endif 93