fs/btrfs/tree-log.h

Source file repositories/reference/linux-study-clean/fs/btrfs/tree-log.h

File Facts

System
Linux kernel
Corpus path
fs/btrfs/tree-log.h
Extension
.h
Size
3855 bytes
Lines
108
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

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);
void btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
void 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,
				  const struct fscrypt_str *name,
				  struct btrfs_inode *dir, u64 index);
void btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
				const struct fscrypt_str *name,
				struct btrfs_inode *inode,
				struct btrfs_inode *dir);
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

Annotation

Implementation Notes