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