ioctl: add nvme_get_log_host_discover()

Since added the NVMe 2.1 log page.

Signed-off-by: Tokunori Ikegami <[email protected]>

Author: ikegami-t

src/nvme/ioctl.h

@@ -2327,6 +2327,41 @@ static inline int nvme_get_log_discovery(int fd, bool rae,
 	return nvme_get_log_page(fd, NVME_LOG_PAGE_PDU_SIZE, &args);
 }
 
+/**
+ * nvme_get_log_host_discover() - Retrieve Host Discovery Log
+ * @fd:		File descriptor of nvme device
+ * @allhoste:	All host entries
+ * @rae:	Retain asynchronous events
+ * @len:	The allocated length of the log page
+ * @log:	User address to store the log page
+ *
+ * Return: The nvme command status if a response was received (see
+ * &enum nvme_status_field) or -1 with errno set otherwise
+ */
+static inline int nvme_get_log_host_discover(int fd, bool allhoste, bool rae, __u32 len,
+					     struct nvme_host_discover_log *log)
+{
+	struct nvme_get_log_args args = {
+		.lpo = 0,
+		.result = NULL,
+		.log = log,
+		.args_size = sizeof(args),
+		.fd = fd,
+		.timeout = NVME_DEFAULT_IOCTL_TIMEOUT,
+		.lid = NVME_LOG_LID_HOST_DISCOVER,
+		.len = len,
+		.nsid = NVME_NSID_ALL,
+		.csi = NVME_CSI_NVM,
+		.lsi = NVME_LOG_LSI_NONE,
+		.lsp = allhoste,
+		.uuidx = NVME_LOG_LSP_NONE,
+		.rae = rae,
+		.ot = false,
+	};
+
+	return nvme_get_log_page(fd, NVME_LOG_PAGE_PDU_SIZE, &args);
+}
+
 /**
  * nvme_get_log_media_unit_stat() - Retrieve Media Unit Status
  * @fd:		File descriptor of nvme device

src/nvme/types.h

@@ -6905,6 +6905,58 @@ struct nvmf_connect_data {
 	char		rsvd5[256];
 };
 
+/**
+ * struct nvme_host_ext_discover_log - Host Extended Discovery Log
+ * @trtype:	Transport Type
+ * @adrfam:	Address Family
+ * @rsvd2:	Reserved
+ * @eflags:	Entry Flags
+ * @rsvd12:	Reserved
+ * @hostnqn:	Host NVMe Qualified Name
+ * @traddr:	Transport Address
+ * @tsas:	Transport Specific Address Subtype
+ * @tel:	Total Entry Length
+ * @numexat:	Number of Extended Attributes
+ * @rsvd1030:	Reserved
+ * @exat:	Extended Attributes List
+ */
+struct nvme_host_ext_discover_log {
+	__u8			trtype;
+	__u8			adrfam;
+	__u8			rsvd2[8];
+	__le16			eflags;
+	__u8			rsvd12[244];
+	char			hostnqn[NVME_NQN_LENGTH];
+	char			traddr[NVMF_TRADDR_SIZE];
+	union nvmf_tsas		tsas;
+	__le32			tel;
+	__le16			numexat;
+	__u8			rsvd1030[2];
+	struct nvmf_ext_attr	exat[];
+};
+
+/**
+ * struct nvme_host_discover_log - Host Discovery Log
+ * @genctr:	Generation Counter
+ * @numrec:	Number of Records
+ * @recfmt:	Record Format
+ * @hdlpf:	Host Discovery Log Page Flags
+ * @rsvd19:	Reserved
+ * @thdlpl:	Total Host Discovery Log Page Length
+ * @rsvd24:	Reserved
+ * @hedlpe:	Host Extended Discovery Log Page Entry List
+ */
+struct nvme_host_discover_log {
+	__le64					genctr;
+	__le64					numrec;
+	__le16					recfmt;
+	__u8					hdlpf;
+	__u8					rsvd19;
+	__le32					thdlpl;
+	__u8					rsvd24[1000];
+	struct nvme_host_ext_discover_log	hedlpe[];
+};
+
 /**
  * struct nvme_mi_read_nvm_ss_info - NVM Subsystem Information Data Structure
  * @nump:	Number of Ports