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        bool logging_new_name;
  20        struct inode *inode;
  21        struct list_head list;
  22        /* Only used for fast fsyncs. */
  23        struct list_head ordered_extents;
  24};
  25
  26static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
  27                                      struct inode *inode)
  28{
  29        ctx->log_ret = 0;
  30        ctx->log_transid = 0;
  31        ctx->log_new_dentries = false;
  32        ctx->logging_new_name = false;
  33        ctx->inode = inode;
  34        INIT_LIST_HEAD(&ctx->list);
  35        INIT_LIST_HEAD(&ctx->ordered_extents);
  36}
  37
  38static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
  39{
  40        struct btrfs_ordered_extent *ordered;
  41        struct btrfs_ordered_extent *tmp;
  42
  43        ASSERT(inode_is_locked(ctx->inode));
  44
  45        list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
  46                list_del_init(&ordered->log_list);
  47                btrfs_put_ordered_extent(ordered);
  48        }
  49}
  50
  51static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
  52{
  53        WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
  54}
  55
  56static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
  57{
  58        return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
  59                trans->transid;
  60}
  61
  62int btrfs_sync_log(struct btrfs_trans_handle *trans,
  63                   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
  64int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
  65int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  66                             struct btrfs_fs_info *fs_info);
  67int btrfs_recover_log_trees(struct btrfs_root *tree_root);
  68int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
  69                          struct dentry *dentry,
  70                          struct btrfs_log_ctx *ctx);
  71int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
  72                                 struct btrfs_root *root,
  73                                 const char *name, int name_len,
  74                                 struct btrfs_inode *dir, u64 index);
  75int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
  76                               struct btrfs_root *root,
  77                               const char *name, int name_len,
  78                               struct btrfs_inode *inode, u64 dirid);
  79void btrfs_end_log_trans(struct btrfs_root *root);
  80void btrfs_pin_log_trans(struct btrfs_root *root);
  81void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
  82                             struct btrfs_inode *dir, struct btrfs_inode *inode,
  83                             int for_rename);
  84void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
  85                                   struct btrfs_inode *dir);
  86void btrfs_log_new_name(struct btrfs_trans_handle *trans,
  87                        struct btrfs_inode *inode, struct btrfs_inode *old_dir,
  88                        struct dentry *parent);
  89
  90#endif
  91