#include <log/log.h>
#include <types/types.h>
#include <system/system.h>
+#include <url/url.h>
#include "device-handler.h"
#include "discover-server.h"
#include "event.h"
#include "parser.h"
+#include "resource.h"
#include "udev.h"
#include "paths.h"
#include "boot.h"
struct discover_device **devices;
unsigned int n_devices;
+
+ struct list unresolved_boot_options;
};
+static bool resource_is_resolved(struct resource *res)
+{
+ return !res || res->resolved;
+}
+
+/* We only use this in an assert, which will disappear if we're compiling
+ * with NDEBUG, so we need the 'used' attribute for these builds */
+static bool __attribute__((used)) boot_option_is_resolved(
+ struct discover_boot_option *opt)
+{
+ return resource_is_resolved(opt->boot_image) &&
+ resource_is_resolved(opt->initrd) &&
+ resource_is_resolved(opt->icon);
+}
+
+static bool resource_resolve(struct resource *res, struct parser *parser,
+ struct device_handler *handler)
+{
+ if (resource_is_resolved(res))
+ return true;
+
+ parser->resolve_resource(handler, res);
+
+ return res->resolved;
+}
+
+static bool boot_option_resolve(struct discover_boot_option *opt,
+ struct device_handler *handler)
+{
+ return resource_resolve(opt->boot_image, opt->source, handler) &&
+ resource_resolve(opt->initrd, opt->source, handler) &&
+ resource_resolve(opt->icon, opt->source, handler);
+}
+
+static void boot_option_finalise(struct discover_boot_option *opt)
+{
+ assert(boot_option_is_resolved(opt));
+
+ /* check that the parsers haven't set any of the final data */
+ assert(!opt->option->boot_image_file);
+ assert(!opt->option->initrd_file);
+ assert(!opt->option->icon_file);
+
+ if (opt->boot_image)
+ opt->option->boot_image_file = opt->boot_image->url->full;
+ if (opt->initrd)
+ opt->option->initrd_file = opt->initrd->url->full;
+ if (opt->icon)
+ opt->option->icon_file = opt->icon->url->full;
+}
+
+static void process_boot_option_queue(struct device_handler *handler)
+{
+ struct discover_boot_option *opt, *tmp;
+
+ list_for_each_entry_safe(&handler->unresolved_boot_options,
+ opt, tmp, list) {
+
+ if (!boot_option_resolve(opt, handler))
+ continue;
+
+ list_remove(&opt->list);
+ list_add(&opt->device->boot_options, &opt->list);
+ talloc_steal(opt->device, opt);
+ boot_option_finalise(opt);
+ discover_server_notify_boot_option_add(handler->server,
+ opt->option);
+ }
+}
+
/**
* context_commit - Commit a temporary discovery context to the handler,
* and notify the clients about any new options / devices
{
struct discover_device *dev = ctx->device;
struct discover_boot_option *opt, *tmp;
- unsigned int i, existing_device;
+ unsigned int i, existing_device = 0;
/* do we already have this device? */
for (i = 0; i < handler->n_devices; i++) {
talloc_steal(handler, dev);
discover_server_notify_device_add(handler->server, dev->device);
+
+ /* this new device might be able to resolve existing boot
+ * options */
+ process_boot_option_queue(handler);
}
/* move boot options from the context to the device */
list_for_each_entry_safe(&ctx->boot_options, opt, tmp, list) {
list_remove(&opt->list);
- list_add(&dev->boot_options, &opt->list);
- talloc_steal(dev, opt);
- discover_server_notify_boot_option_add(handler->server,
- opt->option);
+
+ if (boot_option_resolve(opt, handler)) {
+ list_add(&dev->boot_options, &opt->list);
+ talloc_steal(dev, opt);
+ boot_option_finalise(opt);
+ discover_server_notify_boot_option_add(handler->server,
+ opt->option);
+ } else {
+ if (!opt->source->resolve_resource) {
+ pb_log("parser %s gave us an unresolved "
+ "resource (%s), but no way to "
+ "resolve it\n",
+ opt->source->name, opt->option->id);
+ talloc_free(opt);
+ } else {
+ pb_log("boot option %s is unresolved, "
+ "adding to queue\n",
+ opt->option->id);
+ list_add(&handler->unresolved_boot_options,
+ &opt->list);
+ talloc_steal(handler, opt);
+ }
+ }
}
}
void discover_context_add_boot_option(struct discover_context *ctx,
struct discover_boot_option *boot_option)
{
+ boot_option->source = ctx->parser;
list_add(&ctx->boot_options, &boot_option->list);
talloc_steal(ctx, boot_option);
}
return handler->devices[index];
}
-static void setup_device_links(struct discover_device *dev)
-{
- struct link {
- const char *dir, *val;
- } *link, links[] = {
- {
- .dir = "disk/by-uuid",
- .val = dev->uuid,
- },
- {
- .dir = "disk/by-label",
- .val = dev->label,
- },
- {
- .dir = NULL
- }
- };
-
- for (link = links; link->dir; link++) {
- char *enc, *dir, *path;
-
- if (!link->val || !*link->val)
- continue;
-
- enc = encode_label(dev, link->val);
- dir = join_paths(dev, mount_base(), link->dir);
- path = join_paths(dev, dir, enc);
-
- if (!pb_mkdir_recursive(dir)) {
- unlink(path);
- if (symlink(dev->mount_path, path)) {
- pb_log("symlink(%s,%s): %s\n",
- dev->mount_path, path,
- strerror(errno));
- talloc_free(path);
- } else {
- int i = dev->n_links++;
- dev->links = talloc_realloc(dev,
- dev->links, char *,
- dev->n_links);
- dev->links[i] = path;
- }
-
- }
-
- talloc_free(dir);
- talloc_free(enc);
- }
-}
-
-static void remove_device_links(struct discover_device *dev)
-{
- int i;
-
- for (i = 0; i < dev->n_links; i++)
- unlink(dev->links[i]);
-}
-
static int mount_device(struct discover_device *dev)
{
- const char *mountpoint;
const char *argv[6];
- if (!dev->mount_path) {
- mountpoint = mountpoint_for_device(dev->device_path);
- dev->mount_path = talloc_strdup(dev, mountpoint);
- }
+ if (!dev->mount_path)
+ dev->mount_path = join_paths(dev, mount_base(),
+ dev->device_path);
if (pb_mkdir_recursive(dev->mount_path))
pb_log("couldn't create mount directory %s: %s\n",
goto out_rmdir;
}
- setup_device_links(dev);
return 0;
out_rmdir:
int status;
pid_t pid;
- remove_device_links(dev);
-
if (!dev->mount_path)
return 0;
}
/* run the parsers. This will populate the ctx's boot_option list. */
- iterate_parsers(ctx);
+ iterate_parsers(ctx, CONF_METHOD_LOCAL_FILE);
/* add discovered stuff to the handler */
context_commit(handler, ctx);
return 0;
}
+static enum conf_method parse_conf_method(const char *str)
+{
+
+ if (!strcasecmp(str, "dhcp")) {
+ return CONF_METHOD_DHCP;
+ }
+ return CONF_METHOD_UNKNOWN;
+}
+
+static int handle_conf_user_event(struct device_handler *handler,
+ struct event *event)
+{
+ struct discover_context *ctx;
+ struct discover_device *dev;
+ enum conf_method method;
+ const char *val;
+
+ ctx = talloc(handler, struct discover_context);
+ ctx->event = event;
+ list_init(&ctx->boot_options);
+
+ val = event_get_param(event, "url");
+ if (!val) {
+ talloc_free(ctx);
+ return 0;
+ }
+
+ ctx->conf_url = pb_url_parse(ctx, val);
+ if (!ctx->conf_url) {
+ talloc_free(ctx);
+ return 0;
+ }
+
+ val = event_get_param(event, "method");
+ if (!val) {
+ talloc_free(ctx);
+ return 0;
+ }
+
+ method = parse_conf_method(val);
+ if (method == CONF_METHOD_UNKNOWN) {
+ talloc_free(ctx);
+ return 0;
+ }
+
+ dev = discover_device_create(handler, ctx, event);
+ ctx->device = dev;
+
+ iterate_parsers(ctx, method);
+
+ context_commit(handler, ctx);
+
+ return 0;
+}
+
typedef int (*event_handler)(struct device_handler *, struct event *);
static event_handler handlers[EVENT_TYPE_MAX][EVENT_ACTION_MAX] = {
[EVENT_TYPE_USER] = {
[EVENT_ACTION_ADD] = handle_add_user_event,
[EVENT_ACTION_REMOVE] = handle_remove_user_event,
+ [EVENT_ACTION_CONF] = handle_conf_user_event,
}
};
handler->n_devices = 0;
handler->server = server;
handler->dry_run = dry_run;
+ list_init(&handler->unresolved_boot_options);
/* set up our mount point base */
pb_mkdir_recursive(mount_base());
return NULL;
}
+static void boot_status(void *arg, struct boot_status *status)
+{
+ struct device_handler *handler = arg;
+
+ discover_server_notify_boot_status(handler->server, status);
+}
+
void device_handler_boot(struct device_handler *handler,
struct boot_command *cmd)
{
opt = find_boot_option_by_id(handler, cmd->option_id);
- boot(handler, opt->option, cmd, handler->dry_run);
+ boot(handler, opt, cmd, handler->dry_run, boot_status, handler);
}
projects / petitboot / blobdiff