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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2008 Oracle. All rights reserved.
*/
#ifndef BTRFS_TREE_LOG_H
#define BTRFS_TREE_LOG_H
#include "messages.h"
#include "ctree.h"
#include "transaction.h"
/* 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 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;
};
static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
struct inode *inode)
{
ctx->log_ret = 0;
ctx->log_transid = 0;
ctx->log_new_dentries = false;
ctx->logging_new_name = false;
ctx->logging_new_delayed_dentries = false;
ctx->logged_before = false;
ctx->inode = inode;
INIT_LIST_HEAD(&ctx->list);
INIT_LIST_HEAD(&ctx->ordered_extents);
INIT_LIST_HEAD(&ctx->conflict_inodes);
ctx->num_conflict_inodes = 0;
ctx->logging_conflict_inodes = false;
}
static inline void btrfs_release_log_ctx_extents(struct btrfs_log_ctx *ctx)
{
struct btrfs_ordered_extent *ordered;
struct btrfs_ordered_extent *tmp;
ASSERT(inode_is_locked(ctx->inode));
list_for_each_entry_safe(ordered, tmp, &ctx->ordered_extents, log_list) {
list_del_init(&ordered->log_list);
btrfs_put_ordered_extent(ordered);
}
}
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,
int for_rename);
void btrfs_record_snapshot_destroy(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
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