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TOMOYO Linux Cross Reference
Linux/fs/btrfs/tree-log.h

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  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         bool log_new_dentries;
 33         struct list_head list;
 34 };
 35 
 36 static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx)
 37 {
 38         ctx->log_ret = 0;
 39         ctx->log_transid = 0;
 40         ctx->io_err = 0;
 41         ctx->log_new_dentries = false;
 42         INIT_LIST_HEAD(&ctx->list);
 43 }
 44 
 45 static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
 46                                              struct btrfs_trans_handle *trans)
 47 {
 48         ACCESS_ONCE(fs_info->last_trans_log_full_commit) = trans->transid;
 49 }
 50 
 51 static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
 52                                              struct btrfs_trans_handle *trans)
 53 {
 54         return ACCESS_ONCE(fs_info->last_trans_log_full_commit) ==
 55                 trans->transid;
 56 }
 57 
 58 int btrfs_sync_log(struct btrfs_trans_handle *trans,
 59                    struct btrfs_root *root, struct btrfs_log_ctx *ctx);
 60 int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
 61 int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
 62                              struct btrfs_fs_info *fs_info);
 63 int btrfs_recover_log_trees(struct btrfs_root *tree_root);
 64 int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
 65                           struct btrfs_root *root, struct dentry *dentry,
 66                           const loff_t start,
 67                           const loff_t end,
 68                           struct btrfs_log_ctx *ctx);
 69 int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
 70                                  struct btrfs_root *root,
 71                                  const char *name, int name_len,
 72                                  struct inode *dir, u64 index);
 73 int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
 74                                struct btrfs_root *root,
 75                                const char *name, int name_len,
 76                                struct inode *inode, u64 dirid);
 77 void btrfs_end_log_trans(struct btrfs_root *root);
 78 int btrfs_pin_log_trans(struct btrfs_root *root);
 79 void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
 80                              struct inode *dir, struct inode *inode,
 81                              int for_rename);
 82 int btrfs_log_new_name(struct btrfs_trans_handle *trans,
 83                         struct inode *inode, struct inode *old_dir,
 84                         struct dentry *parent);
 85 #endif
 86 

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