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 /* We can't use the tree log for whatever reason, force a transaction commit */ 16 #define BTRFS_LOG_FORCE_COMMIT (1) 17 18 struct btrfs_log_ctx { 19 int log_ret; 20 int log_transid; 21 bool log_new_dentries; 22 bool logging_new_name; 23 /* Indicate if the inode being logged was logged before. */ 24 bool logged_before; 25 /* Tracks the last logged dir item/index key offset. */ 26 u64 last_dir_item_offset; 27 struct inode *inode; 28 struct list_head list; 29 /* Only used for fast fsyncs. */ 30 struct list_head ordered_extents; 31 }; 32 33 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 34 struct inode *inode) 35 { 36 ctx->log_ret = 0; 37 ctx->log_transid = 0; 38 ctx->log_new_dentries = false; 39 ctx->logging_new_name = false; 40 ctx->logged_before = false; 41 ctx->inode = inode; 42 INIT_LIST_HEAD(&ctx->list); 43 INIT_LIST_HEAD(&ctx->ordered_extents); 44 } 45 46 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx) 47 { 48 struct btrfs_ordered_extent *ordered; 49 struct btrfs_ordered_extent *tmp; 50 51 ASSERT(inode_is_locked(ctx->inode)); 52 53 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) { 54 list_del_init(&ordered->log_list); 55 btrfs_put_ordered_extent(ordered); 56 } 57 } 58 59 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 60 { 61 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 62 } 63 64 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 65 { 66 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 67 trans->transid; 68 } 69 70 int btrfs_sync_log(struct btrfs_trans_handle *trans, 71 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 72 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 73 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 74 struct btrfs_fs_info *fs_info); 75 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 76 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 77 struct dentry *dentry, 78 struct btrfs_log_ctx *ctx); 79 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 80 struct btrfs_root *root, 81 const char *name, int name_len, 82 struct btrfs_inode *dir, u64 index); 83 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 84 struct btrfs_root *root, 85 const char *name, int name_len, 86 struct btrfs_inode *inode, u64 dirid); 87 void btrfs_end_log_trans(struct btrfs_root *root); 88 void btrfs_pin_log_trans(struct btrfs_root *root); 89 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 90 struct btrfs_inode *dir, struct btrfs_inode *inode, 91 int for_rename); 92 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 93 struct btrfs_inode *dir); 94 void btrfs_log_new_name(struct btrfs_trans_handle *trans, 95 struct dentry *old_dentry, struct btrfs_inode *old_dir, 96 u64 old_dir_index, struct dentry *parent); 97 98 #endif 99