70 struct scsi_disk {  struct
71 	struct scsi_driver *driver;	/* always &sd_template */
72 	struct scsi_device *device;
73 	struct device	dev;
74 	struct gendisk	*disk;
75 	struct opal_dev *opal_dev;
77 	u32		nr_zones;
78 	u32		rev_nr_zones;
79 	u32		zone_blocks;
80 	u32		rev_zone_blocks;
81 	u32		zones_optimal_open;
82 	u32		zones_optimal_nonseq;
83 	u32		zones_max_open;
84 	u32		*zones_wp_offset;
85 	spinlock_t	zones_wp_offset_lock;
86 	u32		*rev_wp_offset;
87 	struct mutex	rev_mutex;
88 	struct work_struct zone_wp_offset_work;
89 	char		*zone_wp_update_buf;
91 	atomic_t	openers;
92 	sector_t	capacity;	/* size in logical blocks */
93 	int		max_retries;
94 	u32		max_xfer_blocks;
95 	u32		opt_xfer_blocks;
96 	u32		max_ws_blocks;
97 	u32		max_unmap_blocks;
98 	u32		unmap_granularity;
99 	u32		unmap_alignment;
100 	u32		index;
101 	unsigned int	physical_block_size;
102 	unsigned int	max_medium_access_timeouts;
103 	unsigned int	medium_access_timed_out;
104 	u8		media_present;
105 	u8		write_prot;
129 #define to_scsi_disk(obj) container_of(obj,struct scsi_disk,dev)  argument
131 static inline struct scsi_disk *scsi_disk(struct gendisk *disk)  in scsi_disk()  function