discover-client: Add discover_client_boot

[petitboot] / ui / common / discover-client.c

diff --git a/ui/common/discover-client.c b/ui/common/discover-client.c
index 112fa65782e88e910e2ba3c11a03e1bb637b6ed2..9374dc538506fd788a4c246a547f6d0b0629d38f 100644 (file)
--- a/ui/common/discover-client.c
+++ b/ui/common/discover-client.c
@@ -10,14 +10,16 @@
 #include <asm/byteorder.h>
 
 #include <talloc/talloc.h>
-#include <log.h>
+#include <log/log.h>
 
-#include "ui/common/discover-client.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)
@@ -30,7 +32,8 @@ static int discover_client_destructor(void *arg)
        return 0;
 }
 
-struct discover_client* discover_client_init(struct discover_client_ops *ops)
+struct discover_client* discover_client_init(
+       const struct discover_client_ops *ops, void *cb_arg)
 {
        struct discover_client *client;
        struct sockaddr_un addr;
@@ -40,15 +43,19 @@ 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) {
+       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);
 
@@ -64,7 +71,7 @@ out_err:
        return NULL;
 }
 
-int discover_client_get_fd(struct discover_client *client)
+int discover_client_get_fd(const struct discover_client *client)
 {
        return client->fd;
 }
@@ -74,6 +81,46 @@ void discover_client_destroy(struct discover_client *client)
        talloc_free(client);
 }
 
+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);
+
+       client->ops.device_add(device, 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);
+}
+
 int discover_client_process(struct discover_client *client)
 {
        struct pb_protocol_message *message;
@@ -92,8 +139,8 @@ int discover_client_process(struct discover_client *client)
                        pb_log("%s: no device?\n", __func__);
                        return 0;
                }
-               client->ops.add_device(dev, client->ops.cb_arg);
-               talloc_free(dev);
+
+               device_add(client, dev);
                break;
        case PB_PROTOCOL_ACTION_REMOVE:
                dev_id = pb_protocol_deserialise_string(client, message);
@@ -101,7 +148,7 @@ int discover_client_process(struct discover_client *client)
                        pb_log("%s: no device id?\n", __func__);
                        return 0;
                }
-               client->ops.remove_device(dev_id, client->ops.cb_arg);
+               device_remove(client, dev_id);
                break;
        default:
                pb_log("%s: unknown action %d\n", __func__, message->action);
@@ -110,3 +157,57 @@ int discover_client_process(struct discover_client *client)
 
        return 0;
 }
+
+/* accessors for discovered devices */
+int discover_client_device_count(struct discover_client *client)
+{
+       return client->n_devices;
+}
+
+struct device *discover_client_get_device(struct discover_client *client,
+               int index)
+{
+       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_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;
+}