discover-client: Add discover_client_boot

This change implements the client side of the server-based boot
interface. We add a funcion, discover_client_boot, which serialises a
boot message, then sends it to the server.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>

5 files changed, 82 insertions, 6 deletions

diff --git a/lib/pb-protocol/pb-protocol.c b/lib/pb-protocol/pb-protocol.c
index 1d1a84b..4e0af87 100644
--- a/lib/pb-protocol/pb-protocol.c
+++ b/lib/pb-protocol/pb-protocol.c
@@ -183,6 +183,14 @@ int pb_protocol_device_len(const struct device *dev)
 	return len;
 }
 
+int pb_protocol_boot_len(const struct boot_command *boot)
+{
+	return  4 + optional_strlen(boot->option_id) +
+		4 + optional_strlen(boot->boot_image_file) +
+		4 + optional_strlen(boot->initrd_file) +
+		4 + optional_strlen(boot->boot_args);
+}
+
 int pb_protocol_serialise_device(const struct device *dev, char *buf, int buf_len)
 {
 	struct boot_option *opt;
@@ -223,6 +231,22 @@ int pb_protocol_serialise_device(const struct device *dev, char *buf, int buf_le
 	return 0;
 }
 
+int pb_protocol_serialise_boot_command(const struct boot_command *boot,
+		char *buf, int buf_len)
+{
+	char *pos = buf;
+
+	pos += pb_protocol_serialise_string(pos, boot->option_id);
+	pos += pb_protocol_serialise_string(pos, boot->boot_image_file);
+	pos += pb_protocol_serialise_string(pos, boot->initrd_file);
+	pos += pb_protocol_serialise_string(pos, boot->boot_args);
+
+	assert(pos <= buf + buf_len);
+	(void)buf_len;
+
+	return 0;
+}
+
 int pb_protocol_write_message(int fd, struct pb_protocol_message *message)
 {
 	int total_len, rc;
diff --git a/lib/pb-protocol/pb-protocol.h b/lib/pb-protocol/pb-protocol.h
index beb18cc..2ec264c 100644
--- a/lib/pb-protocol/pb-protocol.h
+++ b/lib/pb-protocol/pb-protocol.h
@@ -26,6 +26,7 @@ struct pb_protocol_message {
 void pb_protocol_dump_device(const struct device *dev, const char *text,
 	FILE *stream);
 int pb_protocol_device_len(const struct device *dev);
+int pb_protocol_boot_len(const struct boot_command *boot);
 int pb_protocol_device_cmp(const struct device *a, const struct device *b);
 
 int pb_protocol_boot_option_cmp(const struct boot_option *a,
@@ -36,6 +37,8 @@ char *pb_protocol_deserialise_string(void *ctx,
 		const struct pb_protocol_message *message);
 
 int pb_protocol_serialise_device(const struct device *dev, char *buf, int buf_len);
+int pb_protocol_serialise_boot_command(const struct boot_command *boot,
+		char *buf, int buf_len);
 
 int pb_protocol_write_message(int fd, struct pb_protocol_message *message);
 
diff --git a/ui/common/discover-client.c b/ui/common/discover-client.c
index cd9f63a..9374dc5 100644
--- a/ui/common/discover-client.c
+++ b/ui/common/discover-client.c
@@ -172,3 +172,42 @@ struct device *discover_client_get_device(struct discover_client *client,
 
 	return client->devices[index];
 }
+
+static void create_boot_command(struct boot_command *command,
+		const struct device *device __attribute__((unused)),
+		const struct boot_option *boot_option,
+		const struct pb_boot_data *data)
+{
+
+	command->option_id = boot_option->id;
+	command->boot_image_file = data->image;
+	command->initrd_file = data->initrd;
+	command->boot_args = data->args;
+}
+
+int discover_client_boot(struct discover_client *client,
+		const struct device *device,
+		const struct boot_option *boot_option,
+		const struct pb_boot_data *data)
+{
+	struct pb_protocol_message *message;
+	struct boot_command boot_command;
+	int len, rc;
+
+	create_boot_command(&boot_command, device, boot_option, data);
+
+	len = pb_protocol_boot_len(&boot_command);
+
+	message = pb_protocol_create_message(client,
+			PB_PROTOCOL_ACTION_BOOT, len);
+
+	if (!message)
+		return -1;
+
+	pb_protocol_serialise_boot_command(&boot_command,
+			message->payload, len);
+
+	rc = pb_protocol_write_message(client->fd, message);
+
+	return rc;
+}
diff --git a/ui/common/discover-client.h b/ui/common/discover-client.h
index 4af936c..6e768d9 100644
--- a/ui/common/discover-client.h
+++ b/ui/common/discover-client.h
@@ -5,6 +5,12 @@
 
 struct discover_client;
 
+struct pb_boot_data {
+	char *image;
+	char *initrd;
+	char *args;
+};
+
 /**
  * struct discover_client_ops - Application supplied client info.
  * @device_add: PB_PROTOCOL_ACTION_ADD event callback.
@@ -51,4 +57,13 @@ int discover_client_device_count(struct discover_client *client);
  */
 struct device *discover_client_get_device(struct discover_client *client,
 		int index);
+
+/* Tell the discover server to boot an image
+ * @param client A pointer to the discover client
+ * @param boot_command The command to boot
+ */
+int discover_client_boot(struct discover_client *client,
+		const struct device *device,
+		const struct boot_option *boot_option,
+		const struct pb_boot_data *data);
 #endif
diff --git a/ui/common/ui-system.h b/ui/common/ui-system.h
index bf4f4e9..b4372ee 100644
--- a/ui/common/ui-system.h
+++ b/ui/common/ui-system.h
@@ -24,15 +24,10 @@
 #include "system/system.h"
 #include "types/types.h"
 #include "ui/common/timer.h"
+#include "ui/common/discover-client.h"
 
 #include <signal.h>
 
-struct pb_boot_data {
-	char *image;
-	char *initrd;
-	char *args;
-};
-
 int pb_boot(const struct pb_boot_data *bd, int dry_run);
 int pb_start_daemon(void);