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         int io_err;
  19         bool log_new_dentries;
  20         struct inode *inode;
  21         struct list_head list;
  22 };
  23
  24 static 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
  35 static 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
  41 static 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
  48 int btrfs_sync_log(struct btrfs_trans_handle *trans,
  49                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
  50 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
  51 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  52                              struct btrfs_fs_info *fs_info);
  53 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
  54 int 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);
  59 int 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);
  63 int 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);
  67 void btrfs_end_log_trans(struct btrfs_root *root);
  68 int btrfs_pin_log_trans(struct btrfs_root *root);
  69 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
  70                              struct btrfs_inode *dir, struct btrfs_inode *inode,
  71                              int for_rename);
  72 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
  73                                    struct btrfs_inode *dir);
  74 /* Return values for btrfs_log_new_name() */
  75 enum {
  76         BTRFS_DONT_NEED_TRANS_COMMIT,
  77         BTRFS_NEED_TRANS_COMMIT,
  78         BTRFS_DONT_NEED_LOG_SYNC,
  79         BTRFS_NEED_LOG_SYNC,
  80 };
  81 int btrfs_log_new_name(struct btrfs_trans_handle *trans,
  82                         struct btrfs_inode *inode, struct btrfs_inode *old_dir,
  83                         struct dentry *parent,
  84                         bool sync_log, struct btrfs_log_ctx *ctx);
  85
  86 #endif