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 bool logging_new_delayed_dentries; 24 /* Indicate if the inode being logged was logged before. */ 25 bool logged_before; 26 /* Tracks the last logged dir item/index key offset. */ 27 u64 last_dir_item_offset; 28 struct inode *inode; 29 struct list_head list; 30 /* Only used for fast fsyncs. */ 31 struct list_head ordered_extents; 32 struct list_head conflict_inodes; 33 int num_conflict_inodes; 34 bool logging_conflict_inodes; 35 }; 36 37 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 38 struct inode *inode) 39 { 40 ctx->log_ret = 0; 41 ctx->log_transid = 0; 42 ctx->log_new_dentries = false; 43 ctx->logging_new_name = false; 44 ctx->logging_new_delayed_dentries = false; 45 ctx->logged_before = false; 46 ctx->inode = inode; 47 INIT_LIST_HEAD(&ctx->list); 48 INIT_LIST_HEAD(&ctx->ordered_extents); 49 INIT_LIST_HEAD(&ctx->conflict_inodes); 50 ctx->num_conflict_inodes = 0; 51 ctx->logging_conflict_inodes = false; 52 } 53 54 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx) 55 { 56 struct btrfs_ordered_extent *ordered; 57 struct btrfs_ordered_extent *tmp; 58 59 ASSERT(inode_is_locked(ctx->inode)); 60 61 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) { 62 list_del_init(&ordered->log_list); 63 btrfs_put_ordered_extent(ordered); 64 } 65 } 66 67 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 68 { 69 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 70 } 71 72 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 73 { 74 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 75 trans->transid; 76 } 77 78 int btrfs_sync_log(struct btrfs_trans_handle *trans, 79 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 80 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 81 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 82 struct btrfs_fs_info *fs_info); 83 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 84 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 85 struct dentry *dentry, 86 struct btrfs_log_ctx *ctx); 87 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 88 struct btrfs_root *root, 89 const char *name, int name_len, 90 struct btrfs_inode *dir, u64 index); 91 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 92 struct btrfs_root *root, 93 const char *name, int name_len, 94 struct btrfs_inode *inode, u64 dirid); 95 void btrfs_end_log_trans(struct btrfs_root *root); 96 void btrfs_pin_log_trans(struct btrfs_root *root); 97 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 98 struct btrfs_inode *dir, struct btrfs_inode *inode, 99 int for_rename); 100 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 101 struct btrfs_inode *dir); 102 void btrfs_log_new_name(struct btrfs_trans_handle *trans, 103 struct dentry *old_dentry, struct btrfs_inode *old_dir, 104 u64 old_dir_index, struct dentry *parent); 105 106 #endif 107