X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=ui%2Fcommon%2Fdiscover-client.c;h=42aa9de9a950a3877a7b3dad8c96b96d47305373;hp=bc5a4fab3192ce5795f776d0b04d2ad09499b34a;hb=bd06734362bb727b09b943688d9b69aa0a84590d;hpb=32e6a41f33e5576716b351bd473a27939fe94fa1

diff --git a/ui/common/discover-client.c b/ui/common/discover-client.c
index bc5a4fa..42aa9de 100644
--- a/ui/common/discover-client.c
+++ b/ui/common/discover-client.c
@@ -1,4 +1,6 @@
 
+#include <assert.h>
+#include <errno.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -9,14 +11,16 @@
 #include <asm/byteorder.h>
 
 #include <talloc/talloc.h>
+#include <log/log.h>
 
-#include "ui/common/discover-client.h"
-#include "ui/common/device.h"
+#include "discover-client.h"
 #include "pb-protocol/pb-protocol.h"
 
 struct discover_client {
 	int fd;
 	struct discover_client_ops ops;
+	int n_devices;
+	struct device **devices;
 };
 
 static int discover_client_destructor(void *arg)
@@ -29,7 +33,139 @@ static int discover_client_destructor(void *arg)
 	return 0;
 }
 
-struct discover_client* discover_client_init(struct discover_client_ops *ops)
+void discover_client_destroy(struct discover_client *client)
+{
+	talloc_free(client);
+}
+
+static struct device *find_device(struct discover_client *client,
+		const char *id)
+{
+	int i;
+
+	for (i = 0; i < client->n_devices; i++) {
+		struct device *dev = client->devices[i];
+		if (!strcmp(dev->id, id))
+			return dev;
+	}
+
+	return NULL;
+}
+
+static void device_add(struct discover_client *client, struct device *device)
+{
+	client->n_devices++;
+	client->devices = talloc_realloc(client, client->devices,
+			struct device *, client->n_devices);
+
+	client->devices[client->n_devices - 1] = device;
+	talloc_steal(client, device);
+
+	if (client->ops.device_add)
+		client->ops.device_add(device, client->ops.cb_arg);
+}
+
+static void boot_option_add(struct discover_client *client,
+		struct boot_option *opt)
+{
+	struct device *dev;
+
+	dev = find_device(client, opt->device_id);
+
+	/* we require that devices are already present before any boot options
+	 * are added */
+	assert(dev);
+
+	talloc_steal(dev, opt);
+
+	if (client->ops.boot_option_add)
+		client->ops.boot_option_add(dev, opt, client->ops.cb_arg);
+}
+
+static void device_remove(struct discover_client *client, const char *id)
+{
+	struct device *device = NULL;
+	int i;
+
+	for (i = 0; i < client->n_devices; i++) {
+		if (!strcmp(client->devices[i]->id, id)) {
+			device = client->devices[i];
+			break;
+		}
+	}
+
+	if (!device)
+		return;
+
+	/* remove the device from the client's device array */
+	client->n_devices--;
+	memmove(&client->devices[i], &client->devices[i+1],
+			(client->n_devices - i) * sizeof(client->devices[0]));
+	client->devices = talloc_realloc(client, client->devices,
+			struct device *, client->n_devices);
+
+	/* notify the UI */
+	client->ops.device_remove(device, client->ops.cb_arg);
+
+	talloc_free(device);
+}
+
+static int discover_client_process(void *arg)
+{
+	struct discover_client *client = arg;
+	struct pb_protocol_message *message;
+	struct boot_option *opt;
+	struct device *dev;
+	char *dev_id;
+	int rc;
+
+	message = pb_protocol_read_message(client, client->fd);
+
+	if (!message)
+		return -1;
+
+	switch (message->action) {
+	case PB_PROTOCOL_ACTION_DEVICE_ADD:
+		dev = talloc_zero(client, struct device);
+		list_init(&dev->boot_options);
+
+		rc = pb_protocol_deserialise_device(dev, message);
+		if (rc) {
+			pb_log("%s: no device?\n", __func__);
+			return 0;
+		}
+
+		device_add(client, dev);
+		break;
+	case PB_PROTOCOL_ACTION_BOOT_OPTION_ADD:
+		opt = talloc_zero(client, struct boot_option);
+
+		rc = pb_protocol_deserialise_boot_option(opt, message);
+		if (rc) {
+			pb_log("%s: no boot_option?\n", __func__);
+			return 0;
+		}
+
+		boot_option_add(client, opt);
+		break;
+	case PB_PROTOCOL_ACTION_DEVICE_REMOVE:
+		dev_id = pb_protocol_deserialise_string(client, message);
+		if (!dev_id) {
+			pb_log("%s: no device id?\n", __func__);
+			return 0;
+		}
+		device_remove(client, dev_id);
+		break;
+	default:
+		pb_log("%s: unknown action %d\n", __func__, message->action);
+	}
+
+
+	return 0;
+}
+
+struct discover_client* discover_client_init(struct waitset *waitset,
+	const struct discover_client_ops *ops, void *cb_arg)
 {
 	struct discover_client *client;
 	struct sockaddr_un addr;
@@ -39,23 +175,30 @@ struct discover_client* discover_client_init(struct discover_client_ops *ops)
 		return NULL;
 
 	memcpy(&client->ops, ops, sizeof(client->ops));
+	client->ops.cb_arg = cb_arg;
 
 	client->fd = socket(AF_UNIX, SOCK_STREAM, 0);
-	if (!client->fd < 0) {
-		perror("socket");
+	if (client->fd < 0) {
+		pb_log("%s: socket: %s\n", __func__, strerror(errno));
 		goto out_err;
 	}
 
 	talloc_set_destructor(client, discover_client_destructor);
 
+	client->n_devices = 0;
+	client->devices = NULL;
+
 	addr.sun_family = AF_UNIX;
 	strcpy(addr.sun_path, PB_SOCKET_PATH);
 
 	if (connect(client->fd, (struct sockaddr *)&addr, sizeof(addr))) {
-		perror("connect");
+		pb_log("%s: connect: %s\n", __func__, strerror(errno));
 		goto out_err;
 	}
 
+	waiter_register(waitset, client->fd, WAIT_IN, discover_client_process,
+			client);
+
 	return client;
 
 out_err:
@@ -63,49 +206,56 @@ out_err:
 	return NULL;
 }
 
-int discover_client_get_fd(struct discover_client *client)
+/* accessors for discovered devices */
+int discover_client_device_count(struct discover_client *client)
 {
-	return client->fd;
+	return client->n_devices;
 }
 
-void discover_client_destroy(struct discover_client *client)
+struct device *discover_client_get_device(struct discover_client *client,
+		int index)
 {
-	talloc_free(client);
+	if (index < 0 || index >= client->n_devices)
+		return NULL;
+
+	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_process(struct discover_client *client)
+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 device *dev;
-	char *dev_id;
+	struct boot_command boot_command;
+	int len, rc;
 
-	message = pb_protocol_read_message(client, client->fd);
+	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 0;
+		return -1;
 
-	switch (message->action) {
-	case PB_PROTOCOL_ACTION_ADD:
-		dev = pb_protocol_deserialise_device(client, message);
-		if (!dev) {
-			printf("no device?\n");
-			return 0;
-		}
-		client->ops.add_device(dev);
-		talloc_free(dev);
-		break;
-	case PB_PROTOCOL_ACTION_REMOVE:
-		dev_id = pb_protocol_deserialise_string(client, message);
-		if (!dev_id) {
-			printf("no device id?\n");
-			return 0;
-		}
-		client->ops.remove_device(dev_id);
-		break;
-	default:
-		printf("unknown action %d\n", message->action);
-	}
+	pb_protocol_serialise_boot_command(&boot_command,
+			message->payload, len);
 
+	rc = pb_protocol_write_message(client->fd, message);
 
-	return 0;
+	return rc;
 }