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        /* Tracks the last logged dir item/index key offset. */
  21        u64 last_dir_item_offset;
  22        struct inode *inode;
  23        struct list_head list;
  24        /* Only used for fast fsyncs. */
  25        struct list_head ordered_extents;
  26};
  27
  28static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
  29                                      struct inode *inode)
  30{
  31        ctx->log_ret = 0;
  32        ctx->log_transid = 0;
  33        ctx->log_new_dentries = false;
  34        ctx->logging_new_name = false;
  35        ctx->inode = inode;
  36        INIT_LIST_HEAD(&ctx->list);
  37        INIT_LIST_HEAD(&ctx->ordered_extents);
  38}
  39
  40static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
  41{
  42        struct btrfs_ordered_extent *ordered;
  43        struct btrfs_ordered_extent *tmp;
  44
  45        ASSERT(inode_is_locked(ctx->inode));
  46
  47        list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
  48                list_del_init(&ordered->log_list);
  49                btrfs_put_ordered_extent(ordered);
  50        }
  51}
  52
  53static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
  54{
  55        WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
  56}
  57
  58static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
  59{
  60        return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
  61                trans->transid;
  62}
  63
  64int btrfs_sync_log(struct btrfs_trans_handle *trans,
  65                   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
  66int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
  67int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  68                             struct btrfs_fs_info *fs_info);
  69int btrfs_recover_log_trees(struct btrfs_root *tree_root);
  70int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
  71                          struct dentry *dentry,
  72                          struct btrfs_log_ctx *ctx);
  73void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
  74                                  struct btrfs_root *root,
  75                                  const char *name, int name_len,
  76                                  struct btrfs_inode *dir, u64 index);
  77void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
  78                                struct btrfs_root *root,
  79                                const char *name, int name_len,
  80                                struct btrfs_inode *inode, u64 dirid);
  81void btrfs_end_log_trans(struct btrfs_root *root);
  82void btrfs_pin_log_trans(struct btrfs_root *root);
  83void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
  84                             struct btrfs_inode *dir, struct btrfs_inode *inode,
  85                             int for_rename);
  86void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
  87                                   struct btrfs_inode *dir);
  88void btrfs_log_new_name(struct btrfs_trans_handle *trans,
  89                        struct btrfs_inode *inode, struct btrfs_inode *old_dir,
  90                        struct dentry *parent);
  91
  92#endif
  93