#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 device_handler {
- struct discover_server *server;
+ struct discover_server *server;
+ int dry_run;
- struct device **devices;
- unsigned int n_devices;
+ struct discover_device **devices;
+ unsigned int n_devices;
- struct list contexts;
+ struct list unresolved_boot_options;
};
+void discover_context_add_boot_option(struct discover_context *ctx,
+ struct discover_boot_option *boot_option)
+{
+ boot_option->source = ctx->parser;
+ list_add_tail(&ctx->boot_options, &boot_option->list);
+ talloc_steal(ctx, boot_option);
+}
+
/**
- * device_handler_add - Add a device to the handler device array.
+ * device_handler_get_device_count - Get the count of current handler devices.
*/
-static void device_handler_add(struct device_handler *handler,
- struct device *device)
+int device_handler_get_device_count(const struct device_handler *handler)
{
- handler->n_devices++;
- handler->devices = talloc_realloc(handler, handler->devices,
- struct device *, handler->n_devices);
- handler->devices[handler->n_devices - 1] = device;
+ return handler->n_devices;
}
/**
- * device_handler_remove - Remove a device from the handler device array.
+ * device_handler_get_device - Get a handler device by index.
*/
-static void device_handler_remove(struct device_handler *handler,
- struct device *device)
+const struct discover_device *device_handler_get_device(
+ const struct device_handler *handler, unsigned int index)
{
- unsigned int i;
-
- for (i = 0; i < handler->n_devices; i++)
- if (handler->devices[i] == device)
- break;
-
- if (i == handler->n_devices) {
- assert(0 && "unknown device");
- return;
+ if (index >= handler->n_devices) {
+ assert(0 && "bad index");
+ return NULL;
}
- handler->n_devices--;
- memmove(&handler->devices[i], &handler->devices[i + 1],
- (handler->n_devices - i) * sizeof(handler->devices[0]));
- handler->devices = talloc_realloc(handler, handler->devices,
- struct device *, handler->n_devices);
+ return handler->devices[index];
}
-/**
- * device_handler_find - Find a handler device by id.
- */
-
-static struct device *device_handler_find(struct device_handler *handler,
- const char *id)
+struct discover_boot_option *discover_boot_option_create(
+ struct discover_context *ctx,
+ struct discover_device *device)
{
- unsigned int i;
+ struct discover_boot_option *opt;
- assert(id);
+ opt = talloc_zero(ctx, struct discover_boot_option);
+ opt->option = talloc_zero(opt, struct boot_option);
+ opt->device = device;
- for (i = 0; i < handler->n_devices; i++)
- if (handler->devices[i]->id
- && streq(handler->devices[i]->id, id))
- return handler->devices[i];
+ return opt;
+}
- pb_log("%s: unknown device: %s\n", __func__, id);
- return NULL;
+static int device_match_path(struct discover_device *dev, const char *path)
+{
+ return dev->device_path && !strcmp(dev->device_path, path);
}
-/**
- * device_handler_get_device_count - Get the count of current handler devices.
- */
+static int device_match_uuid(struct discover_device *dev, const char *uuid)
+{
+ return dev->uuid && !strcmp(dev->uuid, uuid);
+}
-int device_handler_get_device_count(const struct device_handler *handler)
+static int device_match_label(struct discover_device *dev, const char *label)
{
- return handler->n_devices;
+ return dev->label && !strcmp(dev->label, label);
}
-/**
- * device_handler_get_device - Get a handler device by index.
- */
+static int device_match_id(struct discover_device *dev, const char *id)
+{
+ return !strcmp(dev->device->id, id);
+}
-const struct device *device_handler_get_device(
- const struct device_handler *handler, unsigned int index)
+static struct discover_device *device_lookup(
+ struct device_handler *device_handler,
+ int (match_fn)(struct discover_device *, const char *),
+ const char *str)
{
- if (index >= handler->n_devices) {
- assert(0 && "bad index");
+ 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 handler->devices[index];
+ return NULL;
}
-static void setup_device_links(struct discover_context *ctx)
-{
- 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
- }
- };
+struct discover_device *device_lookup_by_name(struct device_handler *handler,
+ const char *name)
+{
+ struct discover_device *dev;
+ char *path;
- for (link = links; link->env; link++) {
- char *enc, *dir, *path;
- const char *value;
+ if (strncmp(name, "/dev/", strlen("/dev/")))
+ path = talloc_asprintf(NULL, "/dev/%s", name);
+ else
+ path = talloc_strdup(NULL, name);
- value = event_get_param(ctx->event, link->env);
- if (!value || !*value)
- continue;
+ dev = device_lookup_by_path(handler, path);
- enc = encode_label(ctx, value);
- dir = join_paths(ctx, mount_base(), link->dir);
- path = join_paths(ctx, dir, value);
-
- if (!pb_mkdir_recursive(dir)) {
- unlink(path);
- if (symlink(ctx->mount_path, path)) {
- pb_log("symlink(%s,%s): %s\n",
- ctx->mount_path, path,
- strerror(errno));
- talloc_free(path);
- } else {
- int i = ctx->n_links++;
- ctx->links = talloc_realloc(ctx,
- ctx->links, char *,
- ctx->n_links);
- ctx->links[i] = path;
- }
+ talloc_free(path);
- }
+ return dev;
+}
- talloc_free(dir);
- talloc_free(enc);
- }
+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);
}
-static void remove_device_links(struct discover_context *ctx)
+struct discover_device *device_lookup_by_label(
+ struct device_handler *device_handler,
+ const char *label)
{
- int i;
+ 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);
+}
+
+void device_handler_destroy(struct device_handler *handler)
+{
+ talloc_free(handler);
+}
+
+#ifdef PETITBOOT_TEST
+
+/* we have a simplified interface for petitboot testing, but still want
+ * to keep struct device_handler opaque. */
+struct device_handler *device_handler_init(
+ struct discover_server *server __attribute__((unused)),
+ int dry_run __attribute__((unused)))
+{
+ struct device_handler *handler;
+
+ handler = talloc_zero(NULL, struct device_handler);
+ list_init(&handler->unresolved_boot_options);
- for (i = 0; i < ctx->n_links; i++)
- unlink(ctx->links[i]);
+ return handler;
}
-static int mount_device(struct discover_context *ctx)
+void device_handler_add_device(struct device_handler *handler,
+ struct discover_device *dev)
+{
+ handler->n_devices++;
+ handler->devices = talloc_realloc(handler, handler->devices,
+ struct discover_device *, handler->n_devices);
+ handler->devices[handler->n_devices - 1] = dev;
+}
+
+#else
+
+static int mount_device(struct discover_device *dev)
{
- const char *mountpoint;
const char *argv[6];
- if (!ctx->mount_path) {
- mountpoint = mountpoint_for_device(ctx->device_path);
- ctx->mount_path = talloc_strdup(ctx, mountpoint);
- }
+ if (!dev->device_path)
+ return -1;
- if (pb_mkdir_recursive(ctx->mount_path))
+ 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",
- ctx->mount_path, strerror(errno));
+ dev->mount_path, strerror(errno));
argv[0] = pb_system_apps.mount;
- argv[1] = ctx->device_path;
- argv[2] = ctx->mount_path;
+ argv[1] = dev->device_path;
+ argv[2] = dev->mount_path;
argv[3] = "-o";
argv[4] = "ro";
argv[5] = NULL;
/* Retry mount without ro option. */
argv[0] = pb_system_apps.mount;
- argv[1] = ctx->device_path;
- argv[2] = ctx->mount_path;
+ argv[1] = dev->device_path;
+ argv[2] = dev->mount_path;
argv[3] = NULL;
if (pb_run_cmd(argv, 1, 0))
goto out_rmdir;
}
- setup_device_links(ctx);
return 0;
out_rmdir:
- pb_rmdir_recursive(mount_base(), ctx->mount_path);
+ pb_rmdir_recursive(mount_base(), dev->mount_path);
return -1;
}
-static int umount_device(struct discover_context *ctx)
+static int umount_device(struct discover_device *dev)
{
int status;
pid_t pid;
- remove_device_links(ctx);
+ if (!dev->mount_path)
+ return 0;
pid = fork();
if (pid == -1) {
if (pid == 0) {
execl(pb_system_apps.umount, pb_system_apps.umount,
- ctx->mount_path, NULL);
+ dev->mount_path, NULL);
exit(EXIT_FAILURE);
}
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
return -1;
- pb_rmdir_recursive(mount_base(), ctx->mount_path);
+ pb_rmdir_recursive(mount_base(), dev->mount_path);
+
+ return 0;
+}
+
+struct device_handler *device_handler_init(struct discover_server *server,
+ int dry_run)
+{
+ struct device_handler *handler;
+
+ handler = talloc(NULL, struct device_handler);
+ handler->devices = NULL;
+ 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());
+
+ parser_init();
+
+ return handler;
+}
+
+static int destroy_device(void *arg)
+{
+ struct discover_device *dev = arg;
+
+ umount_device(dev);
return 0;
}
-static struct discover_context *find_context(struct device_handler *handler,
+static struct discover_device *find_device(struct device_handler *handler,
const char *id)
{
- struct discover_context *ctx;
+ struct discover_device *dev;
+ unsigned int i;
- list_for_each_entry(&handler->contexts, ctx, list) {
- if (!strcmp(ctx->id, id))
- return ctx;
+ for (i = 0; i < handler->n_devices; i++) {
+ dev = handler->devices[i];
+ if (!strcmp(dev->device->id, id))
+ return dev;
}
return NULL;
}
-static int destroy_context(void *arg)
+static struct discover_device *discover_device_create(
+ struct device_handler *handler,
+ struct discover_context *ctx,
+ struct event *event)
{
- struct discover_context *ctx = arg;
+ struct discover_device *dev;
+ const char *devname;
- list_remove(&ctx->list);
- umount_device(ctx);
+ dev = find_device(handler, event->device);
+ if (dev)
+ return dev;
- return 0;
+ dev = talloc_zero(ctx, struct discover_device);
+ dev->device = talloc_zero(dev, struct device);
+ list_init(&dev->boot_options);
+
+ devname = event_get_param(ctx->event, "DEVNAME");
+ if (devname)
+ dev->device_path = talloc_strdup(dev, devname);
+
+ dev->device->id = talloc_strdup(dev, event->device);
+
+ talloc_set_destructor(dev, destroy_device);
+
+ return dev;
+}
+
+/**
+ * device_handler_remove - Remove a device from the handler device array.
+ */
+
+static void device_handler_remove(struct device_handler *handler,
+ struct discover_device *device)
+{
+ unsigned int i;
+
+ for (i = 0; i < handler->n_devices; i++)
+ if (handler->devices[i] == device)
+ break;
+
+ if (i == handler->n_devices) {
+ assert(0 && "unknown device");
+ return;
+ }
+
+ handler->n_devices--;
+ memmove(&handler->devices[i], &handler->devices[i + 1],
+ (handler->n_devices - i) * sizeof(handler->devices[0]));
+ handler->devices = talloc_realloc(handler, handler->devices,
+ struct discover_device *, handler->n_devices);
+
+ discover_server_notify_device_remove(handler->server, device->device);
+
+ talloc_free(device);
+}
+
+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, const char *name,
+ struct discover_boot_option *opt,
+ struct device_handler *handler)
+{
+ struct parser *parser = opt->source;
+
+ if (resource_is_resolved(res))
+ return true;
+
+ pb_log("Attempting to resolve resource %s->%s with parser %s\n",
+ opt->option->id, name, parser->name);
+ 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, "boot_image", opt, handler) &&
+ resource_resolve(opt->initrd, "initrd", opt, handler) &&
+ resource_resolve(opt->icon, "icon", opt, 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);
+ assert(!opt->option->device_id);
+
+ 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;
+
+ opt->option->device_id = opt->device->device->id;
+}
+
+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) {
+
+ pb_log("queue: attempting resolution for %s\n",
+ opt->option->id);
+
+ if (!boot_option_resolve(opt, handler))
+ continue;
+
+ pb_log("\tresolved!\n");
+
+ 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
+ */
+static void context_commit(struct device_handler *handler,
+ struct discover_context *ctx)
+{
+ struct discover_device *dev = ctx->device;
+ 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++) {
+ if (ctx->device == handler->devices[i]) {
+ existing_device = 1;
+ break;
+ }
+ }
+
+ /* if not already present, add the device to the handler's array */
+ if (!existing_device) {
+ handler->n_devices++;
+ handler->devices = talloc_realloc(handler, handler->devices,
+ struct discover_device *, handler->n_devices);
+ handler->devices[handler->n_devices - 1] = dev;
+ talloc_steal(handler, dev);
+
+ discover_server_notify_device_add(handler->server, dev->device);
+
+ /* this new device might be able to resolve existing boot
+ * options */
+ pb_log("New device %s, processing queue\n", dev->device->id);
+ 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);
+
+ if (boot_option_resolve(opt, handler)) {
+ pb_log("boot option %s is resolved, "
+ "sending to clients\n",
+ opt->option->id);
+ 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);
+ }
+ }
+ }
}
static int handle_add_udev_event(struct device_handler *handler,
struct event *event)
{
struct discover_context *ctx;
- const char *devname;
+ struct discover_device *dev;
+ const char *param;
int rc;
/* create our context */
ctx = talloc(handler, struct discover_context);
ctx->event = event;
- ctx->mount_path = NULL;
- ctx->links = NULL;
- ctx->n_links = 0;
+ list_init(&ctx->boot_options);
- ctx->id = talloc_strdup(ctx, event->device);
+ /* create our top-level device */
+ dev = discover_device_create(handler, ctx, event);
- devname = event_get_param(ctx->event, "DEVNAME");
- assert(devname);
- ctx->device_path = talloc_strdup(ctx, devname);
+ ctx->device = dev;
+
+ /* 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(ctx);
+ rc = mount_device(dev);
if (rc) {
talloc_free(ctx);
return 0;
}
- list_add(&handler->contexts, &ctx->list);
- talloc_set_destructor(ctx, destroy_context);
-
- /* set up the top-level device */
- ctx->device = talloc_zero(ctx, struct device);
- ctx->device->id = talloc_strdup(ctx->device, ctx->id);
- list_init(&ctx->device->boot_options);
-
- /* run the parsers */
- iterate_parsers(ctx);
+ /* run the parsers. This will populate the ctx's boot_option list. */
+ iterate_parsers(ctx, CONF_METHOD_LOCAL_FILE);
- /* add device to handler device array */
- device_handler_add(handler, ctx->device);
+ /* add discovered stuff to the handler */
+ context_commit(handler, ctx);
- discover_server_notify_add(handler->server, ctx->device);
+ talloc_free(ctx);
return 0;
}
static int handle_remove_udev_event(struct device_handler *handler,
struct event *event)
{
- struct discover_context *ctx;
+ struct discover_device *dev;
- ctx = find_context(handler, event->device);
- if (!ctx)
+ dev = find_device(handler, event->device);
+ if (!dev)
return 0;
- discover_server_notify_remove(handler->server, ctx->device);
-
/* remove device from handler device array */
- device_handler_remove(handler, ctx->device);
-
- talloc_free(ctx);
+ device_handler_remove(handler, dev);
return 0;
}
static int handle_add_user_event(struct device_handler *handler,
struct event *event)
{
- struct device *device;
+ struct discover_context *ctx;
+ struct discover_device *dev;
+ int rc;
assert(event->device);
- device = talloc_zero(handler, struct device);
+ ctx = talloc(handler, struct discover_context);
+ ctx->event = event;
+ list_init(&ctx->boot_options);
+
+ dev = discover_device_create(handler, ctx, event);
+ ctx->device = dev;
- if (!device)
- goto fail;
+ rc = parse_user_event(ctx, event);
- device->id = talloc_strdup(device, event->device);
- list_init(&device->boot_options);
+ if (!rc)
+ context_commit(handler, ctx);
+
+ return rc;
+}
- parse_user_event(device, event);
+static int handle_remove_user_event(struct device_handler *handler,
+ struct event *event)
+{
+ struct discover_device *dev = find_device(handler, event->device);
- discover_server_notify_add(handler->server, device);
+ if (!dev)
+ return 0;
- /* add device to handler device array */
- device_handler_add(handler, device);
+ /* remove device from handler device array */
+ device_handler_remove(handler, dev);
return 0;
+}
-fail:
- talloc_free(device);
- 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_remove_user_event(struct device_handler *handler,
+static int handle_conf_user_event(struct device_handler *handler,
struct event *event)
{
- struct device *device = device_handler_find(handler, event->device);
+ 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;
+ }
- if (!device)
+ ctx->conf_url = pb_url_parse(ctx, val);
+ if (!ctx->conf_url) {
+ talloc_free(ctx);
return 0;
+ }
- discover_server_notify_remove(handler->server, device);
+ val = event_get_param(event, "method");
+ if (!val) {
+ talloc_free(ctx);
+ return 0;
+ }
- /* remove device from handler device array */
- device_handler_remove(handler, device);
+ 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);
- talloc_free(device);
return 0;
}
[EVENT_TYPE_USER] = {
[EVENT_ACTION_ADD] = handle_add_user_event,
[EVENT_ACTION_REMOVE] = handle_remove_user_event,
+ [EVENT_ACTION_CONF] = handle_conf_user_event,
}
};
return handlers[event->type][event->action](handler, event);
}
-struct device_handler *device_handler_init(struct discover_server *server)
+static void boot_status(void *arg, struct boot_status *status)
{
- struct device_handler *handler;
+ struct device_handler *handler = arg;
- handler = talloc(NULL, struct device_handler);
- handler->devices = NULL;
- handler->n_devices = 0;
- handler->server = server;
-
- list_init(&handler->contexts);
-
- /* set up our mount point base */
- pb_mkdir_recursive(mount_base());
-
- parser_init();
-
- return handler;
-}
-
-void device_handler_destroy(struct device_handler *handler)
-{
- talloc_free(handler);
+ discover_server_notify_boot_status(handler->server, status);
}
-static struct boot_option *find_boot_option_by_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 device *dev = handler->devices[i];
- struct boot_option *opt;
+ struct discover_device *dev = handler->devices[i];
+ struct discover_boot_option *opt;
list_for_each_entry(&dev->boot_options, opt, list)
- if (!strcmp(opt->id, id))
+ 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);
- boot(handler, opt, cmd, 0);
+ boot(handler, opt, cmd, handler->dry_run, boot_status, handler);
}
+#endif
projects / petitboot / blobdiff