udev: several trivial cleanups (#37059)
This commit is contained in:
Luca Boccassi
GitHub
commit
4dca06cba9
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@ -110,7 +110,7 @@ _udevadm() {
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)
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local verbs=(info trigger settle control monitor test-builtin test verify cat wait lock)
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local builtins=(blkid btrfs factory_reset hwdb input_id keyboard kmod net_driver net_id net_setup_link path_id uaccess usb_id)
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local builtins=(blkid btrfs dissect_image factory_reset hwdb input_id keyboard kmod net_driver net_id net_setup_link path_id uaccess usb_id)
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for ((i=0; i < COMP_CWORD; i++)); do
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if __contains_word "${COMP_WORDS[i]}" "${verbs[@]}"; then
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@ -103,7 +103,7 @@ _udevadm_test-builtin(){
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'(- *)'{-h,--help}'[Print help]' \
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'(- *)'{-V,--version}'[Print version of the program]' \
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'--action=[The action string.]:actions:(add change remove move online offline bind unbind)' \
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'*::builtins:(blkid btrfs factory_reset hwdb input_id keyboard kmod net_driver net_id net_setup_link path_id uaccess usb_id)'
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'*::builtins:(blkid btrfs dissect_image factory_reset hwdb input_id keyboard kmod net_driver net_id net_setup_link path_id uaccess usb_id)'
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elif (( CURRENT == 3 )); then
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_arguments \
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'--action=[The action string.]:actions:(add change remove move online offline bind unbind)' \
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@ -20,6 +20,7 @@
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#define WORKER_NUM_MAX UINT64_C(2048)
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static int default_log_level = LOG_INFO;
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static bool arg_debug = false;
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bool arg_daemonize = false;
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@ -279,7 +280,7 @@ static void manager_merge_config_log_level(Manager *manager) {
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if (manager->config.trace)
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manager->config.log_level = LOG_DEBUG;
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else
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MERGE_NON_NEGATIVE(log_level, log_get_max_level());
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MERGE_NON_NEGATIVE(log_level, default_log_level);
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}
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static void manager_merge_config(Manager *manager) {
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@ -441,6 +442,8 @@ int manager_load(Manager *manager, int argc, char *argv[]) {
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assert(manager);
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default_log_level = log_get_max_level();
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manager_parse_udev_config(&manager->config_by_udev_conf);
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r = parse_argv(argc, argv, &manager->config_by_command);
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@ -160,47 +160,23 @@ Manager* manager_free(Manager *manager) {
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return mfree(manager);
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}
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static int on_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata);
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Manager* manager_new(void) {
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Manager *manager;
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static int worker_new(Worker **ret, Manager *manager, sd_device_monitor *worker_monitor, PidRef *pidref) {
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_cleanup_(worker_freep) Worker *worker = NULL;
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int r;
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manager = new(Manager, 1);
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if (!manager)
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return NULL;
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assert(ret);
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assert(manager);
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assert(worker_monitor);
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assert(pidref);
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/* This takes and invalidates pidref even on some error cases. */
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worker = new(Worker, 1);
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if (!worker)
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return -ENOMEM;
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*worker = (Worker) {
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.pidref = TAKE_PIDREF(*pidref),
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*manager = (Manager) {
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.inotify_fd = -EBADF,
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.config_by_udev_conf = UDEV_CONFIG_INIT,
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.config_by_command = UDEV_CONFIG_INIT,
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.config_by_kernel = UDEV_CONFIG_INIT,
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.config_by_control = UDEV_CONFIG_INIT,
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.config = UDEV_CONFIG_INIT,
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};
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r = device_monitor_get_address(worker_monitor, &worker->address);
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if (r < 0)
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return r;
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r = event_add_child_pidref(manager->event, &worker->child_event_source, &worker->pidref, WEXITED, on_sigchld, worker);
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if (r < 0)
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return r;
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r = sd_event_source_set_priority(worker->child_event_source, EVENT_PRIORITY_WORKER_SIGCHLD);
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if (r < 0)
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return r;
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r = hashmap_ensure_put(&manager->workers, &worker_hash_op, &worker->pidref, worker);
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if (r < 0)
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return r;
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worker->manager = manager;
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*ret = TAKE_PTR(worker);
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return 0;
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return manager;
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}
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void manager_kill_workers(Manager *manager, int signo) {
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@ -335,6 +311,94 @@ void manager_reload(Manager *manager, bool force) {
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notify_ready(manager);
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}
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static int on_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) {
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_cleanup_(worker_freep) Worker *worker = ASSERT_PTR(userdata);
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sd_device *dev = worker->event ? ASSERT_PTR(worker->event->dev) : NULL;
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int r;
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assert(si);
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switch (si->si_code) {
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case CLD_EXITED:
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if (si->si_status == 0) {
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log_device_debug(dev, "Worker ["PID_FMT"] exited.", si->si_pid);
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return 0;
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}
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log_device_warning(dev, "Worker ["PID_FMT"] exited with return code %i.",
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si->si_pid, si->si_status);
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if (!dev)
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return 0;
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(void) device_add_exit_status(dev, si->si_status);
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break;
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case CLD_KILLED:
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case CLD_DUMPED:
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log_device_warning(dev, "Worker ["PID_FMT"] terminated by signal %i (%s).",
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si->si_pid, si->si_status, signal_to_string(si->si_status));
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if (!dev)
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return 0;
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(void) device_add_signal(dev, si->si_status);
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break;
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default:
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assert_not_reached();
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}
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/* delete state from disk */
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device_delete_db(dev);
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device_tag_index(dev, NULL, false);
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r = device_monitor_send(worker->manager->monitor, NULL, dev);
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if (r < 0)
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log_device_warning_errno(dev, r, "Failed to broadcast event to libudev listeners, ignoring: %m");
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return 0;
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}
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static int worker_new(Worker **ret, Manager *manager, sd_device_monitor *worker_monitor, PidRef *pidref) {
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_cleanup_(worker_freep) Worker *worker = NULL;
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int r;
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assert(ret);
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assert(manager);
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assert(worker_monitor);
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assert(pidref);
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/* This takes and invalidates pidref even on some error cases. */
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worker = new(Worker, 1);
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if (!worker)
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return -ENOMEM;
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*worker = (Worker) {
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.pidref = TAKE_PIDREF(*pidref),
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};
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r = device_monitor_get_address(worker_monitor, &worker->address);
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if (r < 0)
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return r;
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r = event_add_child_pidref(manager->event, &worker->child_event_source, &worker->pidref, WEXITED, on_sigchld, worker);
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if (r < 0)
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return r;
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r = sd_event_source_set_priority(worker->child_event_source, EVENT_PRIORITY_WORKER_SIGCHLD);
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if (r < 0)
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return r;
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r = hashmap_ensure_put(&manager->workers, &worker_hash_op, &worker->pidref, worker);
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if (r < 0)
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return r;
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worker->manager = manager;
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*ret = TAKE_PTR(worker);
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return 0;
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}
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static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
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Event *event = ASSERT_PTR(userdata);
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@ -806,6 +870,60 @@ static int on_uevent(sd_device_monitor *monitor, sd_device *dev, void *userdata)
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return 1;
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}
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static int manager_init_device_monitor(Manager *manager, int fd) {
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int r;
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assert(manager);
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/* This takes passed file descriptor on success. */
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if (fd >= 0) {
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if (manager->monitor)
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return log_warning_errno(SYNTHETIC_ERRNO(EALREADY), "Received multiple netlink socket (%i), ignoring.", fd);
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r = sd_is_socket(fd, AF_NETLINK, SOCK_RAW, /* listening = */ -1);
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if (r < 0)
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return log_warning_errno(r, "Failed to verify socket type of %i, ignoring: %m", fd);
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if (r == 0)
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return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "Received invalid netlink socket (%i), ignoring.", fd);
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} else {
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if (manager->monitor)
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return 0;
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}
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r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd);
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if (r < 0)
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return log_error_errno(r, "Failed to initialize device monitor: %m");
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return 0;
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}
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static int manager_start_device_monitor(Manager *manager) {
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int r;
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assert(manager);
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r = manager_init_device_monitor(manager, -EBADF);
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if (r < 0)
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return r;
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(void) sd_device_monitor_set_description(manager->monitor, "manager");
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r = sd_device_monitor_attach_event(manager->monitor, manager->event);
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if (r < 0)
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return log_error_errno(r, "Failed to attach event to device monitor: %m");
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r = sd_device_monitor_start(manager->monitor, on_uevent, manager);
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if (r < 0)
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return log_error_errno(r, "Failed to start device monitor: %m");
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r = sd_event_source_set_priority(sd_device_monitor_get_event_source(manager->monitor), EVENT_PRIORITY_DEVICE_MONITOR);
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if (r < 0)
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return log_error_errno(r, "Failed to set priority to device monitor: %m");
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return 0;
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}
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static int on_worker_notify(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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Manager *manager = ASSERT_PTR(userdata);
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int r;
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@ -882,6 +1000,24 @@ static int on_worker_notify(sd_event_source *s, int fd, uint32_t revents, void *
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return 0;
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}
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static int manager_start_worker_notify(Manager *manager) {
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int r;
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assert(manager);
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assert(manager->event);
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r = notify_socket_prepare(
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manager->event,
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EVENT_PRIORITY_WORKER_NOTIFY,
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on_worker_notify,
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manager,
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&manager->worker_notify_socket_path);
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if (r < 0)
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return log_error_errno(r, "Failed to prepare worker notification socket: %m");
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return 0;
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}
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static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
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Manager *manager = ASSERT_PTR(userdata);
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@ -898,53 +1034,6 @@ static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void
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return 1;
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}
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static int on_sigchld(sd_event_source *s, const siginfo_t *si, void *userdata) {
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_cleanup_(worker_freep) Worker *worker = ASSERT_PTR(userdata);
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sd_device *dev = worker->event ? ASSERT_PTR(worker->event->dev) : NULL;
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int r;
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assert(si);
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switch (si->si_code) {
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case CLD_EXITED:
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if (si->si_status == 0) {
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log_device_debug(dev, "Worker ["PID_FMT"] exited.", si->si_pid);
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return 0;
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}
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log_device_warning(dev, "Worker ["PID_FMT"] exited with return code %i.",
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si->si_pid, si->si_status);
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if (!dev)
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return 0;
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(void) device_add_exit_status(dev, si->si_status);
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break;
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case CLD_KILLED:
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case CLD_DUMPED:
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log_device_warning(dev, "Worker ["PID_FMT"] terminated by signal %i (%s).",
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si->si_pid, si->si_status, signal_to_string(si->si_status));
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if (!dev)
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return 0;
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(void) device_add_signal(dev, si->si_status);
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break;
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default:
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assert_not_reached();
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}
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/* delete state from disk */
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device_delete_db(dev);
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device_tag_index(dev, NULL, false);
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r = device_monitor_send(worker->manager->monitor, NULL, dev);
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if (r < 0)
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log_device_warning_errno(dev, r, "Failed to broadcast event to libudev listeners, ignoring: %m");
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return 0;
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}
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static int manager_unlink_queue_file(Manager *manager) {
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assert(manager);
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@ -1009,149 +1098,6 @@ static int on_post(sd_event_source *s, void *userdata) {
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return 0;
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}
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Manager* manager_new(void) {
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Manager *manager;
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manager = new(Manager, 1);
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if (!manager)
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return NULL;
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*manager = (Manager) {
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.inotify_fd = -EBADF,
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.config_by_udev_conf = UDEV_CONFIG_INIT,
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.config_by_command = UDEV_CONFIG_INIT,
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.config_by_kernel = UDEV_CONFIG_INIT,
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.config_by_control = UDEV_CONFIG_INIT,
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.config = UDEV_CONFIG_INIT,
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};
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return manager;
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}
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static int manager_init_device_monitor(Manager *manager, int fd) {
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int r;
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assert(manager);
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/* This takes passed file descriptor on success. */
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if (fd >= 0) {
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if (manager->monitor)
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return log_warning_errno(SYNTHETIC_ERRNO(EALREADY), "Received multiple netlink socket (%i), ignoring.", fd);
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r = sd_is_socket(fd, AF_NETLINK, SOCK_RAW, /* listening = */ -1);
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if (r < 0)
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return log_warning_errno(r, "Failed to verify socket type of %i, ignoring: %m", fd);
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if (r == 0)
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return log_warning_errno(SYNTHETIC_ERRNO(EINVAL), "Received invalid netlink socket (%i), ignoring.", fd);
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} else {
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if (manager->monitor)
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return 0;
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}
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r = device_monitor_new_full(&manager->monitor, MONITOR_GROUP_KERNEL, fd);
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if (r < 0)
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return log_error_errno(r, "Failed to initialize device monitor: %m");
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return 0;
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}
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static int manager_listen_fds(Manager *manager) {
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_cleanup_strv_free_ char **names = NULL;
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int r;
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assert(manager);
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int n = sd_listen_fds_with_names(/* unset_environment = */ true, &names);
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if (n < 0)
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return n;
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for (int i = 0; i < n; i++) {
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int fd = SD_LISTEN_FDS_START + i;
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if (streq(names[i], "varlink"))
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r = 0; /* The fd will be handled by sd_varlink_server_listen_auto(). */
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else if (streq(names[i], "systemd-udevd-control.socket"))
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r = manager_init_ctrl(manager, fd);
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else if (streq(names[i], "systemd-udevd-kernel.socket"))
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r = manager_init_device_monitor(manager, fd);
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else if (streq(names[i], "inotify"))
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r = manager_init_inotify(manager, fd);
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else
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r = log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
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"Received unexpected fd (%s), ignoring.", names[i]);
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if (r < 0)
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close_and_notify_warn(fd, names[i]);
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}
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return 0;
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}
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int manager_init(Manager *manager) {
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int r;
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assert(manager);
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r = manager_listen_fds(manager);
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if (r < 0)
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return log_error_errno(r, "Failed to listen on fds: %m");
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_cleanup_free_ char *cgroup = NULL;
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r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup);
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if (r < 0)
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log_debug_errno(r, "Failed to get cgroup, ignoring: %m");
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else if (endswith(cgroup, "/udev")) { /* If we are in a subcgroup /udev/ we assume it was delegated to us */
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log_debug("Running in delegated subcgroup '%s'.", cgroup);
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manager->cgroup = TAKE_PTR(cgroup);
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}
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return 0;
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}
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static int manager_start_device_monitor(Manager *manager) {
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int r;
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assert(manager);
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r = manager_init_device_monitor(manager, -EBADF);
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if (r < 0)
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return r;
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(void) sd_device_monitor_set_description(manager->monitor, "manager");
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r = sd_device_monitor_attach_event(manager->monitor, manager->event);
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if (r < 0)
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return log_error_errno(r, "Failed to attach event to device monitor: %m");
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r = sd_device_monitor_start(manager->monitor, on_uevent, manager);
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if (r < 0)
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return log_error_errno(r, "Failed to start device monitor: %m");
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|
||||
r = sd_event_source_set_priority(sd_device_monitor_get_event_source(manager->monitor), EVENT_PRIORITY_DEVICE_MONITOR);
|
||||
if (r < 0)
|
||||
return log_error_errno(r, "Failed to set priority to device monitor: %m");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int manager_start_worker_notify(Manager *manager) {
|
||||
int r;
|
||||
|
||||
assert(manager);
|
||||
assert(manager->event);
|
||||
|
||||
r = notify_socket_prepare(
|
||||
manager->event,
|
||||
EVENT_PRIORITY_WORKER_NOTIFY,
|
||||
on_worker_notify,
|
||||
manager,
|
||||
&manager->worker_notify_socket_path);
|
||||
if (r < 0)
|
||||
return log_error_errno(r, "Failed to prepare worker notification socket: %m");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int manager_setup_event(Manager *manager) {
|
||||
_cleanup_(sd_event_unrefp) sd_event *e = NULL;
|
||||
int r;
|
||||
|
|
@ -1200,15 +1146,59 @@ static int manager_setup_event(Manager *manager) {
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int manager_listen_fds(Manager *manager) {
|
||||
_cleanup_strv_free_ char **names = NULL;
|
||||
int r;
|
||||
|
||||
assert(manager);
|
||||
|
||||
int n = sd_listen_fds_with_names(/* unset_environment = */ true, &names);
|
||||
if (n < 0)
|
||||
return n;
|
||||
|
||||
for (int i = 0; i < n; i++) {
|
||||
int fd = SD_LISTEN_FDS_START + i;
|
||||
|
||||
if (streq(names[i], "varlink"))
|
||||
r = 0; /* The fd will be handled by sd_varlink_server_listen_auto(). */
|
||||
else if (streq(names[i], "systemd-udevd-control.socket"))
|
||||
r = manager_init_ctrl(manager, fd);
|
||||
else if (streq(names[i], "systemd-udevd-kernel.socket"))
|
||||
r = manager_init_device_monitor(manager, fd);
|
||||
else if (streq(names[i], "inotify"))
|
||||
r = manager_init_inotify(manager, fd);
|
||||
else
|
||||
r = log_debug_errno(SYNTHETIC_ERRNO(EINVAL),
|
||||
"Received unexpected fd (%s), ignoring.", names[i]);
|
||||
if (r < 0)
|
||||
close_and_notify_warn(fd, names[i]);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int manager_main(Manager *manager) {
|
||||
int r;
|
||||
|
||||
assert(manager);
|
||||
|
||||
_cleanup_free_ char *cgroup = NULL;
|
||||
r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup);
|
||||
if (r < 0)
|
||||
log_debug_errno(r, "Failed to get cgroup, ignoring: %m");
|
||||
else if (endswith(cgroup, "/udev")) { /* If we are in a subcgroup /udev/ we assume it was delegated to us */
|
||||
log_debug("Running in delegated subcgroup '%s'.", cgroup);
|
||||
manager->cgroup = TAKE_PTR(cgroup);
|
||||
}
|
||||
|
||||
r = manager_setup_event(manager);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
r = manager_listen_fds(manager);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
r = manager_start_ctrl(manager);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
|
|
|||
|
|
@ -68,7 +68,6 @@ Manager* manager_new(void);
|
|||
Manager* manager_free(Manager *manager);
|
||||
DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
|
||||
|
||||
int manager_init(Manager *manager);
|
||||
int manager_main(Manager *manager);
|
||||
void manager_reload(Manager *manager, bool force);
|
||||
void manager_exit(Manager *manager);
|
||||
|
|
|
|||
|
|
@ -51,10 +51,6 @@ int run_udevd(int argc, char *argv[]) {
|
|||
if (r < 0 && r != -EEXIST)
|
||||
return log_error_errno(r, "Failed to create /run/udev: %m");
|
||||
|
||||
r = manager_init(manager);
|
||||
if (r < 0)
|
||||
return r;
|
||||
|
||||
if (arg_daemonize) {
|
||||
pid_t pid;
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue