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	#define FLUSH_BLOCKS 3			#define FLUSH_BLOCKS 3
	#define FLUSH_BLOCKS_WAIT 4			#define FLUSH_BLOCKS_WAIT 4
	/*			/*
	* Flag to ffs_syncvnode() to request flushing of data only,			* Flag to ffs_syncvnode() to request flushing of data only,
	* but skip the ffs_update() on the inode itself. Used to avoid			* but skip the ffs_update() on the inode itself. Used to avoid
	* deadlock when flushing snapshot inodes while holding snaplk.			* deadlock when flushing snapshot inodes while holding snaplk.
	*/			*/
	#define NO_INO_UPDT 0x00000001			#define NO_INO_UPDT 0x00000001
				/*
				* Request data sync only from ffs_syncvnode(), not touching even more
				* metadata than NO_INO_UPDT.
				*/
				#define DATA_ONLY 0x00000002

	int ffs_rdonly(struct inode *);			int ffs_rdonly(struct inode *);

	TAILQ_HEAD(snaphead, inode);			TAILQ_HEAD(snaphead, inode);

	struct snapdata {			struct snapdata {
	LIST_ENTRY(snapdata) sn_link;			LIST_ENTRY(snapdata) sn_link;
	struct snaphead sn_head;			struct snaphead sn_head;
	daddr_t sn_listsize;			daddr_t sn_listsize;
	daddr_t *sn_blklist;			daddr_t *sn_blklist;
	struct lock sn_lock;			struct lock sn_lock;
	};			};

	#endif /* _KERNEL */			#endif /* _KERNEL */

	#endif /* !_UFS_FFS_EXTERN_H */			#endif /* !_UFS_FFS_EXTERN_H */