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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/uapi/linux/blkzoned.h
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@@ -74,6 +74,15 @@
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 };
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 /**
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+ * enum blk_zone_report_flags - Feature flags of reported zone descriptors.
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+ *
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+ * @BLK_ZONE_REP_CAPACITY: Zone descriptor has capacity field.
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+ */
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+enum blk_zone_report_flags {
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+	BLK_ZONE_REP_CAPACITY	= (1 << 0),
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+};
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+
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+/**
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  * struct blk_zone - Zone descriptor for BLKREPORTZONE ioctl.
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  *
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  * @start: Zone start in 512 B sector units
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@@ -84,12 +93,15 @@
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  * @non_seq: Flag indicating that the zone is using non-sequential resources
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  *           (for host-aware zoned block devices only).
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  * @reset: Flag indicating that a zone reset is recommended.
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- * @reserved: Padding to 64 B to match the ZBC/ZAC defined zone descriptor size.
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+ * @resv: Padding for 8B alignment.
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+ * @capacity: Zone usable capacity in 512 B sector units
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+ * @reserved: Padding to 64 B to match the ZBC, ZAC and ZNS defined zone
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+ *            descriptor size.
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  *
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- * start, len and wp use the regular 512 B sector unit, regardless of the
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- * device logical block size. The overall structure size is 64 B to match the
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- * ZBC/ZAC defined zone descriptor and allow support for future additional
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- * zone information.
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+ * start, len, capacity and wp use the regular 512 B sector unit, regardless
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+ * of the device logical block size. The overall structure size is 64 B to
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+ * match the ZBC, ZAC and ZNS defined zone descriptor and allow support for
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+ * future additional zone information.
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  */
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 struct blk_zone {
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 	__u64	start;		/* Zone start sector */
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@@ -99,7 +111,9 @@
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 	__u8	cond;		/* Zone condition */
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 	__u8	non_seq;	/* Non-sequential write resources active */
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 	__u8	reset;		/* Reset write pointer recommended */
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-	__u8	reserved[36];
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+	__u8	resv[4];
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+	__u64	capacity;	/* Zone capacity in number of sectors */
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+	__u8	reserved[24];
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 };
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 /**
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@@ -107,7 +121,7 @@
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  *
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  * @sector: starting sector of report
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  * @nr_zones: IN maximum / OUT actual
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- * @reserved: padding to 16 byte alignment
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+ * @flags: one or more flags as defined by enum blk_zone_report_flags.
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  * @zones: Space to hold @nr_zones @zones entries on reply.
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  *
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  * The array of at most @nr_zones must follow this structure in memory.
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@@ -115,14 +129,16 @@
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 struct blk_zone_report {
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 	__u64		sector;
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 	__u32		nr_zones;
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-	__u8		reserved[4];
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+	__u32		flags;
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 	struct blk_zone zones[0];
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 };
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 /**
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- * struct blk_zone_range - BLKRESETZONE ioctl request
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- * @sector: starting sector of the first zone to issue reset write pointer
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- * @nr_sectors: Total number of sectors of 1 or more zones to reset
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+ * struct blk_zone_range - BLKRESETZONE/BLKOPENZONE/
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+ *                         BLKCLOSEZONE/BLKFINISHZONE ioctl
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+ *                         requests
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+ * @sector: Starting sector of the first zone to operate on.
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+ * @nr_sectors: Total number of sectors of all zones to operate on.
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  */
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 struct blk_zone_range {
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 	__u64		sector;
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@@ -137,8 +153,21 @@
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  *                 sector specified in the report request structure.
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  * @BLKRESETZONE: Reset the write pointer of the zones in the specified
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  *                sector range. The sector range must be zone aligned.
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+ * @BLKGETZONESZ: Get the device zone size in number of 512 B sectors.
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+ * @BLKGETNRZONES: Get the total number of zones of the device.
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+ * @BLKOPENZONE: Open the zones in the specified sector range.
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+ *               The 512 B sector range must be zone aligned.
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+ * @BLKCLOSEZONE: Close the zones in the specified sector range.
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+ *                The 512 B sector range must be zone aligned.
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+ * @BLKFINISHZONE: Mark the zones as full in the specified sector range.
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+ *                 The 512 B sector range must be zone aligned.
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  */
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 #define BLKREPORTZONE	_IOWR(0x12, 130, struct blk_zone_report)
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 #define BLKRESETZONE	_IOW(0x12, 131, struct blk_zone_range)
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+#define BLKGETZONESZ	_IOR(0x12, 132, __u32)
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+#define BLKGETNRZONES	_IOR(0x12, 133, __u32)
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+#define BLKOPENZONE	_IOW(0x12, 134, struct blk_zone_range)
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+#define BLKCLOSEZONE	_IOW(0x12, 135, struct blk_zone_range)
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+#define BLKFINISHZONE	_IOW(0x12, 136, struct blk_zone_range)
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 #endif /* _UAPI_BLKZONED_H */