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
  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