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 /* 17 * We can't use the tree log for whatever reason, force a transaction commit. 18 * We use a negative value because there are functions through the logging code 19 * that need to return an error (< 0 value), false (0) or true (1). Any negative 20 * value will do, as it will cause the log to be marked for a full sync. 21 */ 22 #define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1)) 23 24 struct btrfs_log_ctx { 25 int log_ret; 26 int log_transid; 27 bool log_new_dentries; 28 bool logging_new_name; 29 bool logging_new_delayed_dentries; 30 /* Indicate if the inode being logged was logged before. */ 31 bool logged_before; 32 struct inode *inode; 33 struct list_head list; 34 /* Only used for fast fsyncs. */ 35 struct list_head ordered_extents; 36 struct list_head conflict_inodes; 37 int num_conflict_inodes; 38 bool logging_conflict_inodes; 39 }; 40 41 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, 42 struct inode *inode) 43 { 44 ctx->log_ret = 0; 45 ctx->log_transid = 0; 46 ctx->log_new_dentries = false; 47 ctx->logging_new_name = false; 48 ctx->logging_new_delayed_dentries = false; 49 ctx->logged_before = false; 50 ctx->inode = inode; 51 INIT_LIST_HEAD(&ctx->list); 52 INIT_LIST_HEAD(&ctx->ordered_extents); 53 INIT_LIST_HEAD(&ctx->conflict_inodes); 54 ctx->num_conflict_inodes = 0; 55 ctx->logging_conflict_inodes = false; 56 } 57 58 static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx) 59 { 60 struct btrfs_ordered_extent *ordered; 61 struct btrfs_ordered_extent *tmp; 62 63 ASSERT(inode_is_locked(ctx->inode)); 64 65 list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) { 66 list_del_init(&ordered->log_list); 67 btrfs_put_ordered_extent(ordered); 68 } 69 } 70 71 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans) 72 { 73 WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid); 74 } 75 76 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans) 77 { 78 return READ_ONCE(trans->fs_info->last_trans_log_full_commit) == 79 trans->transid; 80 } 81 82 int btrfs_sync_log(struct btrfs_trans_handle *trans, 83 struct btrfs_root *root, struct btrfs_log_ctx *ctx); 84 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root); 85 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans, 86 struct btrfs_fs_info *fs_info); 87 int btrfs_recover_log_trees(struct btrfs_root *tree_root); 88 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans, 89 struct dentry *dentry, 90 struct btrfs_log_ctx *ctx); 91 void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans, 92 struct btrfs_root *root, 93 const struct fscrypt_str *name, 94 struct btrfs_inode *dir, u64 index); 95 void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans, 96 struct btrfs_root *root, 97 const struct fscrypt_str *name, 98 struct btrfs_inode *inode, u64 dirid); 99 void btrfs_end_log_trans(struct btrfs_root *root); 100 void btrfs_pin_log_trans(struct btrfs_root *root); 101 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans, 102 struct btrfs_inode *dir, struct btrfs_inode *inode, 103 int for_rename); 104 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans, 105 struct btrfs_inode *dir); 106 void btrfs_log_new_name(struct btrfs_trans_handle *trans, 107 struct dentry *old_dentry, struct btrfs_inode *old_dir, 108 u64 old_dir_index, struct dentry *parent); 109 110 #endif 111