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Linux/fs/btrfs/tree-log.h

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  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         struct inode *inode;
 20         struct list_head list;
 21 };
 22 
 23 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
 24                                       struct inode *inode)
 25 {
 26         ctx->log_ret = 0;
 27         ctx->log_transid = 0;
 28         ctx->log_new_dentries = false;
 29         ctx->inode = inode;
 30         INIT_LIST_HEAD(&ctx->list);
 31 }
 32 
 33 static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
 34 {
 35         WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
 36 }
 37 
 38 static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
 39 {
 40         return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
 41                 trans->transid;
 42 }
 43 
 44 int btrfs_sync_log(struct btrfs_trans_handle *trans,
 45                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
 46 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
 47 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
 48                              struct btrfs_fs_info *fs_info);
 49 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
 50 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
 51                           struct dentry *dentry,
 52                           const loff_t start,
 53                           const loff_t end,
 54                           struct btrfs_log_ctx *ctx);
 55 int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
 56                                  struct btrfs_root *root,
 57                                  const char *name, int name_len,
 58                                  struct btrfs_inode *dir, u64 index);
 59 int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
 60                                struct btrfs_root *root,
 61                                const char *name, int name_len,
 62                                struct btrfs_inode *inode, u64 dirid);
 63 void btrfs_end_log_trans(struct btrfs_root *root);
 64 void btrfs_pin_log_trans(struct btrfs_root *root);
 65 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
 66                              struct btrfs_inode *dir, struct btrfs_inode *inode,
 67                              int for_rename);
 68 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
 69                                    struct btrfs_inode *dir);
 70 /* Return values for btrfs_log_new_name() */
 71 enum {
 72         BTRFS_DONT_NEED_TRANS_COMMIT,
 73         BTRFS_NEED_TRANS_COMMIT,
 74         BTRFS_DONT_NEED_LOG_SYNC,
 75         BTRFS_NEED_LOG_SYNC,
 76 };
 77 int btrfs_log_new_name(struct btrfs_trans_handle *trans,
 78                         struct btrfs_inode *inode, struct btrfs_inode *old_dir,
 79                         struct dentry *parent,
 80                         bool sync_log, struct btrfs_log_ctx *ctx);
 81 
 82 #endif
 83 

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