104 lines
3.7 KiB
C
104 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_TREE_LOG_H
|
|
#define BTRFS_TREE_LOG_H
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/fs.h>
|
|
#include "messages.h"
|
|
#include "ctree.h"
|
|
#include "transaction.h"
|
|
|
|
struct inode;
|
|
struct dentry;
|
|
struct btrfs_ordered_extent;
|
|
struct btrfs_root;
|
|
struct btrfs_trans_handle;
|
|
|
|
/* return value for btrfs_log_dentry_safe that means we don't need to log it at all */
|
|
#define BTRFS_NO_LOG_SYNC 256
|
|
|
|
/*
|
|
* We can't use the tree log for whatever reason, force a transaction commit.
|
|
* We use a negative value because there are functions through the logging code
|
|
* that need to return an error (< 0 value), false (0) or true (1). Any negative
|
|
* value will do, as it will cause the log to be marked for a full sync.
|
|
*/
|
|
#define BTRFS_LOG_FORCE_COMMIT (-(MAX_ERRNO + 1))
|
|
|
|
struct btrfs_log_ctx {
|
|
int log_ret;
|
|
int log_transid;
|
|
bool log_new_dentries;
|
|
bool logging_new_name;
|
|
bool logging_new_delayed_dentries;
|
|
/* Indicate if the inode being logged was logged before. */
|
|
bool logged_before;
|
|
struct btrfs_inode *inode;
|
|
struct list_head list;
|
|
/* Only used for fast fsyncs. */
|
|
struct list_head ordered_extents;
|
|
struct list_head conflict_inodes;
|
|
int num_conflict_inodes;
|
|
bool logging_conflict_inodes;
|
|
/*
|
|
* Used for fsyncs that need to copy items from the subvolume tree to
|
|
* the log tree (full sync flag set or copy everything flag set) to
|
|
* avoid allocating a temporary extent buffer while holding a lock on
|
|
* an extent buffer of the subvolume tree and under the log transaction.
|
|
* Also helps to avoid allocating and freeing a temporary extent buffer
|
|
* in case we need to process multiple leaves from the subvolume tree.
|
|
*/
|
|
struct extent_buffer *scratch_eb;
|
|
};
|
|
|
|
void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx, struct btrfs_inode *inode);
|
|
void btrfs_init_log_ctx_scratch_eb(struct btrfs_log_ctx *ctx);
|
|
void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx);
|
|
|
|
static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
|
|
{
|
|
WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
|
|
}
|
|
|
|
static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
|
|
{
|
|
return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
|
|
trans->transid;
|
|
}
|
|
|
|
int btrfs_sync_log(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, struct btrfs_log_ctx *ctx);
|
|
int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
|
|
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info);
|
|
int btrfs_recover_log_trees(struct btrfs_root *tree_root);
|
|
int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
|
|
struct dentry *dentry,
|
|
struct btrfs_log_ctx *ctx);
|
|
void btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const struct fscrypt_str *name,
|
|
struct btrfs_inode *dir, u64 index);
|
|
void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root,
|
|
const struct fscrypt_str *name,
|
|
struct btrfs_inode *inode, u64 dirid);
|
|
void btrfs_end_log_trans(struct btrfs_root *root);
|
|
void btrfs_pin_log_trans(struct btrfs_root *root);
|
|
void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
|
|
struct btrfs_inode *dir, struct btrfs_inode *inode,
|
|
bool for_rename);
|
|
void btrfs_record_snapshot_destroy(struct btrfs_trans_handle *trans,
|
|
struct btrfs_inode *dir);
|
|
void btrfs_record_new_subvolume(const struct btrfs_trans_handle *trans,
|
|
struct btrfs_inode *dir);
|
|
void btrfs_log_new_name(struct btrfs_trans_handle *trans,
|
|
struct dentry *old_dentry, struct btrfs_inode *old_dir,
|
|
u64 old_dir_index, struct dentry *parent);
|
|
|
|
#endif
|