-
#include <assert.h>
#include <stdlib.h>
+#include <stdbool.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
+#include <mntent.h>
#include <sys/stat.h>
#include <sys/wait.h>
+#include <sys/mount.h>
-#include <pb-config/pb-config.h>
#include <talloc/talloc.h>
#include <list/list.h>
#include <log/log.h>
#include "device-handler.h"
#include "discover-server.h"
+#include "user-event.h"
+#include "platform.h"
#include "event.h"
#include "parser.h"
#include "resource.h"
#include "paths.h"
+#include "sysinfo.h"
#include "boot.h"
+#include "udev.h"
+#include "network.h"
struct device_handler {
struct discover_server *server;
int dry_run;
+ struct pb_udev *udev;
+ struct network *network;
+ struct user_event *user_event;
+
struct discover_device **devices;
unsigned int n_devices;
struct discover_boot_option *default_boot_option;
struct list unresolved_boot_options;
+
+ struct boot_task *pending_boot;
+ bool pending_boot_is_default;
};
static int mount_device(struct discover_device *dev);
static int umount_device(struct discover_device *dev);
+static int device_handler_init_sources(struct device_handler *handler);
+
void discover_context_add_boot_option(struct discover_context *ctx,
struct discover_boot_option *boot_option)
{
return !strcmp(dev->device->id, id);
}
+static int device_match_serial(struct discover_device *dev, const char *serial)
+{
+ const char *val = discover_device_get_param(dev, "ID_SERIAL");
+ return val && !strcmp(val, serial);
+}
+
static struct discover_device *device_lookup(
struct device_handler *device_handler,
int (match_fn)(struct discover_device *, const char *),
return device_lookup(device_handler, device_match_id, id);
}
+struct discover_device *device_lookup_by_serial(
+ struct device_handler *device_handler,
+ const char *serial)
+{
+ return device_lookup(device_handler, device_match_serial, serial);
+}
+
void device_handler_destroy(struct device_handler *handler)
{
talloc_free(handler);
list_for_each_entry(&device->params, param, list) {
if (!strcmp(param->name, name))
- return param->name;
+ return param->value;
}
return NULL;
}
struct waitset *waitset, int dry_run)
{
struct device_handler *handler;
+ int rc;
handler = talloc_zero(NULL, struct device_handler);
handler->server = server;
parser_init();
+ rc = device_handler_init_sources(handler);
+ if (rc) {
+ talloc_free(handler);
+ return NULL;
+ }
+
return handler;
}
void device_handler_remove(struct device_handler *handler,
struct discover_device *device)
{
+ struct discover_boot_option *opt, *tmp;
unsigned int i;
for (i = 0; i < handler->n_devices; i++)
return;
}
+ /* Free any unresolved options, as they're currently allocated
+ * against the handler */
+ list_for_each_entry_safe(&handler->unresolved_boot_options,
+ opt, tmp, list) {
+ if (opt->device != device)
+ continue;
+ list_remove(&opt->list);
+ talloc_free(opt);
+ }
+
handler->n_devices--;
memmove(&handler->devices[i], &handler->devices[i + 1],
(handler->n_devices - i) * sizeof(handler->devices[0]));
if (!handler->default_boot_option)
return 0;
+ if (handler->pending_boot)
+ return 0;
+
opt = handler->default_boot_option;
if (handler->sec_to_boot) {
pb_log("Timeout expired, booting default option %s\n", opt->option->id);
- boot(handler, handler->default_boot_option, NULL,
- handler->dry_run, boot_status, handler);
+ handler->pending_boot = boot(handler, handler->default_boot_option,
+ NULL, handler->dry_run, boot_status, handler);
+ handler->pending_boot_is_default = true;
return 0;
}
static bool priority_match(struct boot_priority *prio,
struct discover_boot_option *opt)
{
- return prio->type == opt->device->device->type;
+ return prio->type == opt->device->device->type ||
+ prio->type == DEVICE_TYPE_ANY;
}
static int default_option_priority(struct discover_boot_option *opt)
{
const struct config *config;
struct boot_priority *prio;
- int i;
+ unsigned int i;
config = config_get();
for (i = 0; i < config->n_boot_priorities; i++) {
prio = &config->boot_priorities[i];
if (priority_match(prio, opt))
- break;
+ return prio->priority;
}
- return i;
+ return 0;
}
static void set_default(struct device_handler *handler,
struct discover_boot_option *opt)
{
+ int new_prio;
+
if (!handler->autoboot_enabled)
return;
+ new_prio = default_option_priority(opt);
+
+ /* A negative priority indicates that we don't want to boot this device
+ * by default */
+ if (new_prio < 0)
+ return;
+
/* Resolve any conflicts: if we have a new default option, it only
* replaces the current if it has a higher priority. */
if (handler->default_boot_option) {
- int new_prio, cur_prio;
+ int cur_prio;
- new_prio = default_option_priority(opt);
cur_prio = default_option_priority(
handler->default_boot_option);
- if (new_prio < cur_prio) {
+ if (new_prio > cur_prio) {
handler->default_boot_option = opt;
/* extend the timeout a little, so the user sees some
* indication of the change */
if (resource_is_resolved(res))
return true;
- pb_log("Attempting to resolve resource %s->%s with parser %s\n",
+ pb_debug("Attempting to resolve resource %s->%s with parser %s\n",
opt->option->id, name, parser->name);
parser->resolve_resource(handler, res);
list_for_each_entry_safe(&handler->unresolved_boot_options,
opt, tmp, list) {
- pb_log("queue: attempting resolution for %s\n",
+ pb_debug("queue: attempting resolution for %s\n",
opt->option->id);
if (!boot_option_resolve(opt, handler))
continue;
- pb_log("\tresolved!\n");
+ pb_debug("\tresolved!\n");
list_remove(&opt->list);
list_add_tail(&opt->device->boot_options, &opt->list);
{
struct discover_context *ctx;
- ctx = talloc(handler, struct discover_context);
+ ctx = talloc_zero(handler, struct discover_context);
ctx->device = device;
- ctx->conf_url = NULL;
list_init(&ctx->boot_options);
return ctx;
* array, but has only just been initialised by the hotplug source.
*/
int device_handler_discover(struct device_handler *handler,
- struct discover_device *dev, enum conf_method method)
+ struct discover_device *dev)
{
struct discover_context *ctx;
+ int rc;
process_boot_option_queue(handler);
/* create our context */
ctx = device_handler_discover_context_create(handler, dev);
- mount_device(dev);
+ rc = mount_device(dev);
+ if (rc)
+ goto out;
+
+ /* add this device to our system info */
+ system_info_register_blockdev(dev->device->id, dev->uuid,
+ dev->mount_path);
/* run the parsers. This will populate the ctx's boot_option list. */
- iterate_parsers(ctx, method);
+ iterate_parsers(ctx);
/* add discovered stuff to the handler */
device_handler_discover_context_commit(handler, ctx);
+out:
talloc_free(ctx);
return 0;
}
-/* incoming conf event */
-int device_handler_conf(struct device_handler *handler,
- struct discover_device *dev, struct pb_url *url,
- enum conf_method method)
+/* Incoming dhcp event */
+int device_handler_dhcp(struct device_handler *handler,
+ struct discover_device *dev, struct event *event)
{
struct discover_context *ctx;
/* create our context */
ctx = device_handler_discover_context_create(handler, dev);
- ctx->conf_url = url;
+ ctx->event = event;
- iterate_parsers(ctx, method);
+ iterate_parsers(ctx);
device_handler_discover_context_commit(handler, ctx);
return 0;
}
+/* incoming conf event */
+int device_handler_conf(struct device_handler *handler,
+ struct discover_device *dev, struct pb_url *url)
+{
+ struct discover_context *ctx;
+
+ /* create our context */
+ ctx = device_handler_discover_context_create(handler, dev);
+ ctx->conf_url = url;
+
+ iterate_parsers(ctx);
+
+ device_handler_discover_context_commit(handler, ctx);
+
+ talloc_free(ctx);
+
+ return 0;
+}
+
static struct discover_boot_option *find_boot_option_by_id(
struct device_handler *handler, const char *id)
{
void device_handler_boot(struct device_handler *handler,
struct boot_command *cmd)
{
- struct discover_boot_option *opt;
+ struct discover_boot_option *opt = NULL;
- opt = find_boot_option_by_id(handler, cmd->option_id);
+ if (cmd->option_id && strlen(cmd->option_id))
+ opt = find_boot_option_by_id(handler, cmd->option_id);
- boot(handler, opt, cmd, handler->dry_run, boot_status, handler);
+ if (handler->pending_boot)
+ boot_cancel(handler->pending_boot);
+ handler->pending_boot = boot(handler, opt, cmd, handler->dry_run,
+ boot_status, handler);
+ handler->pending_boot_is_default = false;
}
void device_handler_cancel_default(struct device_handler *handler)
pb_log("Cancelling default boot option\n");
+ if (handler->pending_boot && handler->pending_boot_is_default) {
+ boot_cancel(handler->pending_boot);
+ handler->pending_boot = NULL;
+ handler->pending_boot_is_default = false;
+ }
+
handler->default_boot_option = NULL;
status.type = BOOT_STATUS_INFO;
discover_server_notify_boot_status(handler->server, &status);
}
+void device_handler_update_config(struct device_handler *handler,
+ struct config *config)
+{
+ config_set(config);
+ discover_server_notify_config(handler->server, config);
+}
+
#ifndef PETITBOOT_TEST
+
+static int device_handler_init_sources(struct device_handler *handler)
+{
+ /* init our device sources: udev, network and user events */
+ handler->udev = udev_init(handler, handler->waitset);
+ if (!handler->udev)
+ return -1;
+
+ handler->network = network_init(handler, handler->waitset,
+ handler->dry_run);
+ if (!handler->network)
+ return -1;
+
+ handler->user_event = user_event_init(handler, handler->waitset);
+ if (!handler->user_event)
+ return -1;
+
+ return 0;
+}
+
+static bool check_existing_mount(struct discover_device *dev)
+{
+ struct stat devstat, mntstat;
+ struct mntent *mnt;
+ FILE *fp;
+ int rc;
+
+ rc = stat(dev->device_path, &devstat);
+ if (rc) {
+ pb_debug("%s: stat failed: %s\n", __func__, strerror(errno));
+ return false;
+ }
+
+ if (!S_ISBLK(devstat.st_mode)) {
+ pb_debug("%s: %s isn't a block device?\n", __func__,
+ dev->device_path);
+ return false;
+ }
+
+ fp = fopen("/proc/self/mounts", "r");
+
+ for (;;) {
+ mnt = getmntent(fp);
+ if (!mnt)
+ break;
+
+ if (!mnt->mnt_fsname || mnt->mnt_fsname[0] != '/')
+ continue;
+
+ rc = stat(mnt->mnt_fsname, &mntstat);
+ if (rc)
+ continue;
+
+ if (!S_ISBLK(mntstat.st_mode))
+ continue;
+
+ if (mntstat.st_rdev == devstat.st_rdev) {
+ dev->mount_path = talloc_strdup(dev, mnt->mnt_dir);
+ dev->mounted_rw = !!hasmntopt(mnt, "rw");
+ dev->mounted = true;
+ dev->unmount = false;
+
+ pb_debug("%s: %s is already mounted (r%c) at %s\n",
+ __func__, dev->device_path,
+ dev->mounted_rw ? 'w' : 'o',
+ mnt->mnt_dir);
+ break;
+ }
+ }
+
+ fclose(fp);
+
+ return mnt != NULL;
+}
+
static int mount_device(struct discover_device *dev)
{
+ const char *fstype;
int rc;
if (!dev->device_path)
return -1;
- 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",
- dev->mount_path, strerror(errno));
+ if (dev->mounted)
+ return 0;
- rc = process_run_simple(dev, pb_system_apps.mount,
- dev->device_path, dev->mount_path,
- "-o", "ro", NULL);
+ if (check_existing_mount(dev))
+ return 0;
- if (!rc)
+ fstype = discover_device_get_param(dev, "ID_FS_TYPE");
+ if (!fstype)
return 0;
- /* Retry mount without ro option. */
- rc = process_run_simple(dev, pb_system_apps.mount,
- dev->device_path, dev->mount_path, NULL);
+ dev->mount_path = join_paths(dev, mount_base(),
+ dev->device_path);
- if (!rc)
+ if (pb_mkdir_recursive(dev->mount_path)) {
+ pb_log("couldn't create mount directory %s: %s\n",
+ dev->mount_path, strerror(errno));
+ goto err_free;
+ }
+
+ pb_log("mounting device %s read-only\n", dev->device_path);
+ errno = 0;
+ rc = mount(dev->device_path, dev->mount_path, fstype,
+ MS_RDONLY | MS_SILENT, "");
+ if (!rc) {
+ dev->mounted = true;
+ dev->mounted_rw = false;
+ dev->unmount = true;
return 0;
+ }
+
+ pb_log("couldn't mount device %s: mount failed: %s\n",
+ dev->device_path, strerror(errno));
pb_rmdir_recursive(mount_base(), dev->mount_path);
+err_free:
+ talloc_free(dev->mount_path);
+ dev->mount_path = NULL;
return -1;
}
static int umount_device(struct discover_device *dev)
{
- int status;
+ int rc;
- if (!dev->mount_path)
+ if (!dev->mounted || !dev->unmount)
return 0;
- status = process_run_simple(dev, pb_system_apps.umount,
- dev->mount_path, NULL);
-
- if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ pb_log("unmounting device %s\n", dev->device_path);
+ rc = umount(dev->mount_path);
+ if (rc)
return -1;
+ dev->mounted = false;
+
pb_rmdir_recursive(mount_base(), dev->mount_path);
+ talloc_free(dev->mount_path);
+ dev->mount_path = NULL;
+
+ return 0;
+}
+
+int device_request_write(struct discover_device *dev, bool *release)
+{
+ int rc;
+
+ *release = false;
+
+ if (!dev->mounted)
+ return -1;
+
+ if (dev->mounted_rw)
+ return 0;
+
+ pb_log("remounting device %s read-write\n", dev->device_path);
+ rc = mount(dev->device_path, dev->mount_path, "",
+ MS_REMOUNT | MS_SILENT, "");
+ if (rc)
+ return -1;
+
+ dev->mounted_rw = true;
+ *release = true;
return 0;
}
+
+void device_release_write(struct discover_device *dev, bool release)
+{
+ if (!release)
+ return;
+
+ pb_log("remounting device %s read-only\n", dev->device_path);
+ mount(dev->device_path, dev->mount_path, "",
+ MS_REMOUNT | MS_RDONLY | MS_SILENT, "");
+ dev->mounted_rw = false;
+}
+
#else
+static int device_handler_init_sources(
+ struct device_handler *handler __attribute__((unused)))
+{
+ return 0;
+}
+
static int umount_device(struct discover_device *dev __attribute__((unused)))
{
return 0;
return 0;
}
+int device_request_write(struct discover_device *dev __attribute__((unused)),
+ bool *release)
+{
+ *release = true;
+ return 0;
+}
+
+void device_release_write(struct discover_device *dev __attribute__((unused)),
+ bool release __attribute__((unused)))
+{
+}
+
#endif
projects / petitboot / blobdiff