NVMe: Add definitions for format command

The SCSI emulation has the ability to send format commands, so we need
to add the definition of the command. Also add a missing error code.

Signed-off-by: Vishal Verma <[e-mail]>
Signed-off-by: Matthew Wilcox <[e-mail]>

drivers/block/nvme-core.c

···
 	BUILD_BUG_ON(sizeof(struct nvme_create_sq) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_delete_queue) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_features) != 64);
+	BUILD_BUG_ON(sizeof(struct nvme_format_cmd) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_command) != 64);
 	BUILD_BUG_ON(sizeof(struct nvme_id_ctrl) != 4096);
 	BUILD_BUG_ON(sizeof(struct nvme_id_ns) != 4096);

include/linux/nvme.h

···
 	__u32			rsvd12[4];
 };
 
+struct nvme_format_cmd {
+	__u8			opcode;
+	__u8			flags;
+	__u16			command_id;
+	__le32			nsid;
+	__u64			rsvd2[4];
+	__le32			cdw10;
+	__u32			rsvd11[5];
+};
+
 struct nvme_command {
 	union {
 		struct nvme_common_command common;
···
 		struct nvme_create_sq create_sq;
 		struct nvme_delete_queue delete_queue;
 		struct nvme_download_firmware dlfw;
+		struct nvme_format_cmd format;
 		struct nvme_dsm_cmd dsm;
 	};
 };
···
 	NVME_SC_FUSED_FAIL		= 0x9,
 	NVME_SC_FUSED_MISSING		= 0xa,
 	NVME_SC_INVALID_NS		= 0xb,
+	NVME_SC_CMD_SEQ_ERROR		= 0xc,
 	NVME_SC_LBA_RANGE		= 0x80,
 	NVME_SC_CAP_EXCEEDED		= 0x81,
 	NVME_SC_NS_NOT_READY		= 0x82,