fs/btrfs/tree-log.h

   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         int io_err;
  32         struct list_head list;
  33 };
  34
  35 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx)
  36 {
  37         ctx->log_ret = 0;
  38         ctx->log_transid = 0;
  39         ctx->io_err = 0;
  40         INIT_LIST_HEAD(&ctx->list);
  41 }
  42
  43 static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
  44                                              struct btrfs_trans_handle *trans)
  45 {
  46         ACCESS_ONCE(fs_info->last_trans_log_full_commit) = trans->transid;
  47 }
  48
  49 static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
  50                                              struct btrfs_trans_handle *trans)
  51 {
  52         return ACCESS_ONCE(fs_info->last_trans_log_full_commit) ==
  53                 trans->transid;
  54 }
  55
  56 int btrfs_sync_log(struct btrfs_trans_handle *trans,
  57                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
  58 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
  59 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
  60                              struct btrfs_fs_info *fs_info);
  61 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
  62 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
  63                           struct btrfs_root *root, struct dentry *dentry,
  64                           const loff_t start,
  65                           const loff_t end,
  66                           struct btrfs_log_ctx *ctx);
  67 int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
  68                                  struct btrfs_root *root,
  69                                  const char *name, int name_len,
  70                                  struct inode *dir, u64 index);
  71 int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
  72                                struct btrfs_root *root,
  73                                const char *name, int name_len,
  74                                struct inode *inode, u64 dirid);
  75 void btrfs_end_log_trans(struct btrfs_root *root);
  76 int btrfs_pin_log_trans(struct btrfs_root *root);
  77 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
  78                              struct inode *dir, struct inode *inode,
  79                              int for_rename);
  80 int btrfs_log_new_name(struct btrfs_trans_handle *trans,
  81                         struct inode *inode, struct inode *old_dir,
  82                         struct dentry *parent);
  83 #endif