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/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
23#define BTRFS_NO_LOG_SYNC 256
24
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
25int btrfs_sync_log(struct btrfs_trans_handle *trans,
26		   struct btrfs_root *root);
27int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
28int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
29			     struct btrfs_fs_info *fs_info);
30int btrfs_recover_log_trees(struct btrfs_root *tree_root);
31int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
32			  struct btrfs_root *root, struct dentry *dentry);
 
 
 
33int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
34				 struct btrfs_root *root,
35				 const char *name, int name_len,
36				 struct inode *dir, u64 index);
37int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
38			       struct btrfs_root *root,
39			       const char *name, int name_len,
40			       struct inode *inode, u64 dirid);
41int btrfs_end_log_trans(struct btrfs_root *root);
42int btrfs_pin_log_trans(struct btrfs_root *root);
43int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
44		    struct btrfs_root *root, struct inode *inode,
45		    struct dentry *parent, int exists_only);
46void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
47			     struct inode *dir, struct inode *inode,
48			     int for_rename);
 
 
49int btrfs_log_new_name(struct btrfs_trans_handle *trans,
50			struct inode *inode, struct inode *old_dir,
51			struct dentry *parent);
52#endif

 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
28struct btrfs_log_ctx {
29	int log_ret;
30	int log_transid;
31	int io_err;
32	bool log_new_dentries;
33	struct inode *inode;
34	struct list_head list;
35};
36
37static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
38				      struct inode *inode)
39{
40	ctx->log_ret = 0;
41	ctx->log_transid = 0;
42	ctx->io_err = 0;
43	ctx->log_new_dentries = false;
44	ctx->inode = inode;
45	INIT_LIST_HEAD(&ctx->list);
46}
47
48static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
49					     struct btrfs_trans_handle *trans)
50{
51	ACCESS_ONCE(fs_info->last_trans_log_full_commit) = trans->transid;
52}
53
54static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
55					     struct btrfs_trans_handle *trans)
56{
57	return ACCESS_ONCE(fs_info->last_trans_log_full_commit) ==
58		trans->transid;
59}
60
61int btrfs_sync_log(struct btrfs_trans_handle *trans,
62		   struct btrfs_root *root, struct btrfs_log_ctx *ctx);
63int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
64int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
65			     struct btrfs_fs_info *fs_info);
66int btrfs_recover_log_trees(struct btrfs_root *tree_root);
67int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
68			  struct btrfs_root *root, struct dentry *dentry,
69			  const loff_t start,
70			  const loff_t end,
71			  struct btrfs_log_ctx *ctx);
72int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
73				 struct btrfs_root *root,
74				 const char *name, int name_len,
75				 struct inode *dir, u64 index);
76int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
77			       struct btrfs_root *root,
78			       const char *name, int name_len,
79			       struct inode *inode, u64 dirid);
80void btrfs_end_log_trans(struct btrfs_root *root);
81int btrfs_pin_log_trans(struct btrfs_root *root);
 
 
 
82void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
83			     struct inode *dir, struct inode *inode,
84			     int for_rename);
85void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
86				   struct inode *dir);
87int btrfs_log_new_name(struct btrfs_trans_handle *trans,
88			struct inode *inode, struct inode *old_dir,
89			struct dentry *parent);
90#endif