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         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
  26 static 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
  38 static 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
  51 static 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
  56 static 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
  62 int btrfs_sync_log(struct btrfs_trans_handle *trans,
  63                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
  64 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
  65 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  66                              struct btrfs_fs_info *fs_info);
  67 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
  68 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
  69                           struct dentry *dentry,
  70                           struct btrfs_log_ctx *ctx);
  71 int 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);
  75 int 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);
  79 void btrfs_end_log_trans(struct btrfs_root *root);
  80 void btrfs_pin_log_trans(struct btrfs_root *root);
  81 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
  82                              struct btrfs_inode *dir, struct btrfs_inode *inode,
  83                              int for_rename);
  84 void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
  85                                    struct btrfs_inode *dir);
  86 void 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