LXR linux/fs/btrfs/tree-log.h

   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
  15struct 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
  23static 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
  33static 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
  38static 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
  44int btrfs_sync_log(struct btrfs_trans_handle *trans,
  45                   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
  46int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
  47int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  48                             struct btrfs_fs_info *fs_info);
  49int btrfs_recover_log_trees(struct btrfs_root *tree_root);
  50int 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);
  55int 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);
  59int 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);
  63void btrfs_end_log_trans(struct btrfs_root *root);
  64void btrfs_pin_log_trans(struct btrfs_root *root);
  65void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
  66                             struct btrfs_inode *dir, struct btrfs_inode *inode,
  67                             int for_rename);
  68void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
  69                                   struct btrfs_inode *dir);
  70/* Return values for btrfs_log_new_name() */
  71enum {
  72        BTRFS_DONT_NEED_TRANS_COMMIT,
  73        BTRFS_NEED_TRANS_COMMIT,
  74        BTRFS_DONT_NEED_LOG_SYNC,
  75        BTRFS_NEED_LOG_SYNC,
  76};
  77int 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