Line data    Source code

       1             : /*
       2             :  * Copyright (C) 2008 Oracle.  All rights reserved.
       3             :  *
       4             :  * This program is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU General Public
       6             :  * License v2 as published by the Free Software Foundation.
       7             :  *
       8             :  * This program is distributed in the hope that it will be useful,
       9             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      10             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      11             :  * General Public License for more details.
      12             :  *
      13             :  * You should have received a copy of the GNU General Public
      14             :  * License along with this program; if not, write to the
      15             :  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
      16             :  * Boston, MA 021110-1307, USA.
      17             :  */
      18             : 
      19             : #ifndef __TREE_LOG_
      20             : #define __TREE_LOG_
      21             : 
      22             : #include "ctree.h"
      23             : #include "transaction.h"
      24             : 
      25             : /* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
      26             : #define BTRFS_NO_LOG_SYNC 256
      27             : 
      28             : struct btrfs_log_ctx {
      29             :         int log_ret;
      30             :         int log_transid;
      31             :         struct list_head list;
      32             : };
      33             : 
      34             : static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx)
      35             : {
      36        3046 :         ctx->log_ret = 0;
      37        3046 :         ctx->log_transid = 0;
      38             :         INIT_LIST_HEAD(&ctx->list);
      39             : }
      40             : 
      41             : static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
      42             :                                              struct btrfs_trans_handle *trans)
      43             : {
      44         164 :         ACCESS_ONCE(fs_info->last_trans_log_full_commit) = trans->transid;
      45             : }
      46             : 
      47             : static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
      48             :                                              struct btrfs_trans_handle *trans)
      49             : {
      50        4306 :         return ACCESS_ONCE(fs_info->last_trans_log_full_commit) ==
      51             :                 trans->transid;
      52             : }
      53             : 
      54             : int btrfs_sync_log(struct btrfs_trans_handle *trans,
      55             :                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
      56             : int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
      57             : int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
      58             :                              struct btrfs_fs_info *fs_info);
      59             : int btrfs_recover_log_trees(struct btrfs_root *tree_root);
      60             : int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
      61             :                           struct btrfs_root *root, struct dentry *dentry,
      62             :                           const loff_t start,
      63             :                           const loff_t end,
      64             :                           struct btrfs_log_ctx *ctx);
      65             : int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
      66             :                                  struct btrfs_root *root,
      67             :                                  const char *name, int name_len,
      68             :                                  struct inode *dir, u64 index);
      69             : int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
      70             :                                struct btrfs_root *root,
      71             :                                const char *name, int name_len,
      72             :                                struct inode *inode, u64 dirid);
      73             : void btrfs_end_log_trans(struct btrfs_root *root);
      74             : int btrfs_pin_log_trans(struct btrfs_root *root);
      75             : void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
      76             :                              struct inode *dir, struct inode *inode,
      77             :                              int for_rename);
      78             : int btrfs_log_new_name(struct btrfs_trans_handle *trans,
      79             :                         struct inode *inode, struct inode *old_dir,
      80             :                         struct dentry *parent);
      81             : #endif