libnvme: add missing prototypes for exported symbols

Three __public symbols were listed in the version scripts but had no
prototype in any installed header:

  libnvme_mi_submit_entry()  -- weak tracing hook in mi.c
  libnvme_mi_submit_exit()   -- weak tracing hook in mi.c
  libnvmf_context_set_fabrics_config() -- setter in fabrics.c whose
    getter libnvmf_context_get_fabrics_config() was already declared

Without a prototype in an installed header, callers have no declaration
to include and must either write their own or resort to dlsym().

Signed-off-by: Martin Belanger <[email protected]>
Assisted-by: Claude Sonnet 4.6 <[email protected]>

Author: Martin Belanger

libnvme/src/nvme/fabrics.h

@@ -404,6 +404,19 @@ int libnvmf_context_set_device(struct libnvmf_context *fctx, const char *device)
 struct libnvme_fabrics_config *libnvmf_context_get_fabrics_config(
 		struct libnvmf_context *fctx);
 
+/**
+ * libnvmf_context_set_fabrics_config() - Set fabrics configuration for a
+ * fabrics context
+ * @fctx: Fabrics context
+ * @cfg:  Fabrics configuration to apply
+ *
+ * Copies the fields of @cfg into the fabrics configuration of @fctx.
+ *
+ * Return: 0 on success, or a negative error code on failure.
+ */
+int libnvmf_context_set_fabrics_config(struct libnvmf_context *fctx,
+		struct libnvme_fabrics_config *cfg);
+
 /**
  * libnvmf_ctrl_get_fabrics_config() - Fabrics configuration of a controller
  * @c:	Controller instance

libnvme/src/nvme/mi.h

@@ -947,3 +947,37 @@ int libnvme_mi_aem_disable(libnvme_mi_ep_t ep);
  * Return: 0 is a success, nonzero is an error and errno may be read for further details
  */
 int libnvme_mi_aem_process(libnvme_mi_ep_t ep, void *userdata);
+
+/**
+ * libnvme_mi_submit_entry() - Weak hook called before an MI message is sent.
+ * @type:	MCTP message type
+ * @hdr:	Pointer to the MI message header
+ * @hdr_len:	Length of the message header in bytes
+ * @data:	Pointer to message payload data
+ * @data_len:	Length of payload data in bytes
+ *
+ * This is a weak symbol that can be overridden by an application to intercept
+ * outgoing MI messages for tracing or testing purposes.  The return value is
+ * passed back as @user_data to the matching libnvme_mi_submit_exit() call.
+ *
+ * Return: An opaque pointer passed to libnvme_mi_submit_exit(), or NULL.
+ */
+void *libnvme_mi_submit_entry(__u8 type, const struct nvme_mi_msg_hdr *hdr,
+			      size_t hdr_len, const void *data, size_t data_len);
+
+/**
+ * libnvme_mi_submit_exit() - Weak hook called after an MI message completes.
+ * @type:	MCTP message type
+ * @hdr:	Pointer to the MI response message header
+ * @hdr_len:	Length of the response message header in bytes
+ * @data:	Pointer to response payload data
+ * @data_len:	Length of response payload data in bytes
+ * @user_data:	Value returned by the matching libnvme_mi_submit_entry() call
+ *
+ * This is a weak symbol that can be overridden by an application to intercept
+ * completed MI transactions.  Called with the opaque pointer returned by the
+ * corresponding libnvme_mi_submit_entry() call.
+ */
+void libnvme_mi_submit_exit(__u8 type, const struct nvme_mi_msg_hdr *hdr,
+			    size_t hdr_len, const void *data, size_t data_len,
+			    void *user_data);