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 "messages.h" 10 #include "ctree.h" 11 #include "transaction.h" 12 13 /* return value for btrfs_log_dentry_safe that means we don't need to log it at all */ 14 #define BTRFS_NO_LOG_SYNC 256 15 16 /* We can't use the tree log for whatever reason, force a transaction commit */ 17 #define BTRFS_LOG_FORCE_COMMIT (1) 18 19 struct btrfs_log_ctx { 20 int log_ret; 21 int log_transid; 22 bool log_new_dentries; 23 bool logging_new_name; 24 bool logging_new_delayed_dentries; 25 /* Indicate if the inode being logged was logged before. */ 26 bool logged_before; 27 /* Tracks the last logged dir item/index key offset. */ 28 u64 last_dir_item_offset; 29 struct inode *inode; 30 struct list_head list; 31 /* Only used for fast fsyncs. */ 32 struct list_head ordered_extents; 33 struct list_head conflict_inodes; 34 int num_conflict_inodes; 35 bool logging_conflict_inodes; 36 }; 37 38 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 39 struct inode *inode) 40 { 41 ctx->log_ret = 0; 42 ctx->log_transid = 0; 43 ctx->log_new_dentries = false; 44 ctx->logging_new_name = false; 45 ctx->logging_new_delayed_dentries = false; 46 ctx->logged_before = false; 47 ctx->inode = inode; 48 INIT_LIST_HEAD(&ctx->list); 49 INIT_LIST_HEAD(&ctx->ordered_extents); 50 INIT_LIST_HEAD(&ctx->conflict_inodes); 51 ctx->num_conflict_inodes = 0; 52 ctx->logging_conflict_inodes = false; 53 } 54 55 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx) 56 { 57 struct btrfs_ordered_extent *ordered; 58 struct btrfs_ordered_extent *tmp; 59 60 ASSERT(inode_is_locked(ctx->inode)); 61 62 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) { 63 list_del_init(&ordered->log_list); 64 btrfs_put_ordered_extent(ordered); 65 } 66 } 67 68 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 69 { 70 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 71 } 72 73 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 74 { 75 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 76 trans->transid; 77 } 78 79 int btrfs_sync_log(struct btrfs_trans_handle *trans, 80 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 81 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 82 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 83 struct btrfs_fs_info *fs_info); 84 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 85 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 86 struct dentry *dentry, 87 struct btrfs_log_ctx *ctx); 88 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 89 struct btrfs_root *root, 90 const struct fscrypt_str *name, 91 struct btrfs_inode *dir, u64 index); 92 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 93 struct btrfs_root *root, 94 const struct fscrypt_str *name, 95 struct btrfs_inode *inode, u64 dirid); 96 void btrfs_end_log_trans(struct btrfs_root *root); 97 void btrfs_pin_log_trans(struct btrfs_root *root); 98 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 99 struct btrfs_inode *dir, struct btrfs_inode *inode, 100 int for_rename); 101 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 102 struct btrfs_inode *dir); 103 void btrfs_log_new_name(struct btrfs_trans_handle *trans, 104 struct dentry *old_dentry, struct btrfs_inode *old_dir, 105 u64 old_dir_index, struct dentry *parent); 106 107 #endif 108