#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_context *ctx)
{
struct discover_device *dev = ctx->device;
- unsigned int i, existing_device;
- struct boot_option *opt, *tmp;
+ struct discover_boot_option *opt, *tmp;
+ 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->device->boot_options, &opt->list);
- dev->device->n_options++;
- discover_server_notify_boot_option_add(handler->server, opt);
+
+ 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 {
+ list_add(&handler->unresolved_boot_options, &opt->list);
+ talloc_steal(handler, opt);
+ }
}
}
void discover_context_add_boot_option(struct discover_context *ctx,
- struct boot_option *boot_option)
+ struct discover_boot_option *boot_option)
{
+ boot_option->source = ctx->parser;
list_add(&ctx->boot_options, &boot_option->list);
talloc_steal(ctx, boot_option);
}
* device_handler_get_device - Get a handler device by index.
*/
-const struct device *device_handler_get_device(
+const struct discover_device *device_handler_get_device(
const struct device_handler *handler, unsigned int index)
{
if (index >= handler->n_devices) {
return NULL;
}
- return handler->devices[index]->device;
+ return handler->devices[index];
}
-static void setup_device_links(struct discover_context *ctx)
+static int mount_device(struct discover_device *dev)
{
- struct discover_device *dev = ctx->device;
- struct link {
- char *env, *dir;
- } *link, links[] = {
- {
- .env = "ID_FS_UUID",
- .dir = "disk/by-uuid"
- },
- {
- .env = "ID_FS_LABEL",
- .dir = "disk/by-label"
- },
- {
- .env = NULL
- }
- };
-
- for (link = links; link->env; link++) {
- char *enc, *dir, *path;
- const char *value;
-
- value = event_get_param(ctx->event, link->env);
- if (!value || !*value)
- continue;
-
- enc = encode_label(ctx, value);
- dir = join_paths(ctx, mount_base(), link->dir);
- path = join_paths(dev, dir, value);
-
- 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_context *ctx)
-{
- struct discover_device *dev = ctx->device;
- 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(ctx);
return 0;
out_rmdir:
int status;
pid_t pid;
- remove_device_links(dev);
-
if (!dev->mount_path)
return 0;
dev = talloc_zero(ctx, struct discover_device);
dev->device = talloc_zero(dev, struct device);
- list_init(&dev->device->boot_options);
+ list_init(&dev->boot_options);
devname = event_get_param(ctx->event, "DEVNAME");
if (devname)
return dev;
}
+struct discover_boot_option *discover_boot_option_create(
+ struct discover_context *ctx,
+ struct discover_device *device)
+{
+ struct discover_boot_option *opt;
+
+ opt = talloc_zero(ctx, struct discover_boot_option);
+ opt->option = talloc_zero(opt, struct boot_option);
+ opt->device = device;
+
+ return opt;
+}
+
+
static int handle_add_udev_event(struct device_handler *handler,
struct event *event)
{
struct discover_context *ctx;
struct discover_device *dev;
+ const char *param;
int rc;
/* create our context */
ctx->device = dev;
- rc = mount_device(ctx);
+ /* try to parse UUID and labels */
+ param = event_get_param(ctx->event, "ID_FS_UUID");
+ if (param)
+ dev->uuid = talloc_strdup(dev, param);
+
+ param = event_get_param(ctx->event, "ID_FS_LABEL");
+ if (param)
+ dev->label = talloc_strdup(dev, param);
+
+ rc = mount_device(dev);
if (rc) {
talloc_free(ctx);
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());
talloc_free(handler);
}
-static struct boot_option *find_boot_option_by_id(
+static int device_match_path(struct discover_device *dev, const char *path)
+{
+ return !strcmp(dev->device_path, path);
+}
+
+static int device_match_uuid(struct discover_device *dev, const char *uuid)
+{
+ return dev->uuid && !strcmp(dev->uuid, uuid);
+}
+
+static int device_match_label(struct discover_device *dev, const char *label)
+{
+ return dev->label && !strcmp(dev->label, label);
+}
+
+static int device_match_id(struct discover_device *dev, const char *id)
+{
+ return !strcmp(dev->device->id, id);
+}
+
+static struct discover_device *device_lookup(
+ struct device_handler *device_handler,
+ int (match_fn)(struct discover_device *, const char *),
+ const char *str)
+{
+ struct discover_device *dev;
+ unsigned int i;
+
+ if (!str)
+ return NULL;
+
+ for (i = 0; i < device_handler->n_devices; i++) {
+ dev = device_handler->devices[i];
+
+ if (match_fn(dev, str))
+ return dev;
+ }
+
+ return NULL;
+}
+
+struct discover_device *device_lookup_by_name(struct device_handler *handler,
+ const char *name)
+{
+ struct discover_device *dev;
+ char *path;
+
+ if (strncmp(name, "/dev/", strlen("/dev/")))
+ path = talloc_asprintf(NULL, "/dev/%s", name);
+ else
+ path = talloc_strdup(NULL, name);
+
+ dev = device_lookup_by_path(handler, path);
+
+ talloc_free(path);
+
+ return dev;
+}
+
+struct discover_device *device_lookup_by_path(
+ struct device_handler *device_handler,
+ const char *path)
+{
+ return device_lookup(device_handler, device_match_path, path);
+}
+
+struct discover_device *device_lookup_by_uuid(
+ struct device_handler *device_handler,
+ const char *uuid)
+{
+ return device_lookup(device_handler, device_match_uuid, uuid);
+}
+
+struct discover_device *device_lookup_by_label(
+ struct device_handler *device_handler,
+ const char *label)
+{
+ return device_lookup(device_handler, device_match_label, label);
+}
+
+struct discover_device *device_lookup_by_id(
+ struct device_handler *device_handler,
+ const char *id)
+{
+ return device_lookup(device_handler, device_match_id, id);
+}
+
+static struct discover_boot_option *find_boot_option_by_id(
struct device_handler *handler, const char *id)
{
unsigned int i;
for (i = 0; i < handler->n_devices; i++) {
struct discover_device *dev = handler->devices[i];
- struct boot_option *opt;
+ struct discover_boot_option *opt;
- list_for_each_entry(&dev->device->boot_options, opt, list)
- if (!strcmp(opt->id, id))
+ list_for_each_entry(&dev->boot_options, opt, list)
+ if (!strcmp(opt->option->id, id))
return opt;
}
void device_handler_boot(struct device_handler *handler,
struct boot_command *cmd)
{
- struct boot_option *opt;
+ struct discover_boot_option *opt;
opt = find_boot_option_by_id(handler, cmd->option_id);
projects / petitboot / blobdiff