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 /* Indicate if the inode being logged was logged before. */ 21 bool logged_before; 22 /* Tracks the last logged dir item/index key offset. */ 23 u64 last_dir_item_offset; 24 struct inode *inode; 25 struct list_head list; 26 /* Only used for fast fsyncs. */ 27 struct list_head ordered_extents; 28 }; 29 30 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 31 struct inode *inode) 32 { 33 ctx->log_ret = 0; 34 ctx->log_transid = 0; 35 ctx->log_new_dentries = false; 36 ctx->logging_new_name = false; 37 ctx->logged_before = false; 38 ctx->inode = inode; 39 INIT_LIST_HEAD(&ctx->list); 40 INIT_LIST_HEAD(&ctx->ordered_extents); 41 } 42 43 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx) 44 { 45 struct btrfs_ordered_extent *ordered; 46 struct btrfs_ordered_extent *tmp; 47 48 ASSERT(inode_is_locked(ctx->inode)); 49 50 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) { 51 list_del_init(&ordered->log_list); 52 btrfs_put_ordered_extent(ordered); 53 } 54 } 55 56 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 57 { 58 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 59 } 60 61 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 62 { 63 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 64 trans->transid; 65 } 66 67 int btrfs_sync_log(struct btrfs_trans_handle *trans, 68 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 69 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 70 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 71 struct btrfs_fs_info *fs_info); 72 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 73 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 74 struct dentry *dentry, 75 struct btrfs_log_ctx *ctx); 76 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 77 struct btrfs_root *root, 78 const char *name, int name_len, 79 struct btrfs_inode *dir, u64 index); 80 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 81 struct btrfs_root *root, 82 const char *name, int name_len, 83 struct btrfs_inode *inode, u64 dirid); 84 void btrfs_end_log_trans(struct btrfs_root *root); 85 void btrfs_pin_log_trans(struct btrfs_root *root); 86 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 87 struct btrfs_inode *dir, struct btrfs_inode *inode, 88 int for_rename); 89 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 90 struct btrfs_inode *dir); 91 void btrfs_log_new_name(struct btrfs_trans_handle *trans, 92 struct dentry *old_dentry, struct btrfs_inode *old_dir, 93 u64 old_dir_index, struct dentry *parent); 94 95 #endif 96