c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <stddef.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <signal.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <unistd.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <errno.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <stdio.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <stdlib.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <stdbool.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <string.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <ctype.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <fcntl.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <time.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <getopt.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <dirent.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/time.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/prctl.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/socket.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/un.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/signalfd.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/epoll.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/poll.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/wait.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/stat.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/ioctl.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/inotify.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include <sys/utsname.h>

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include "udev.h"

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include "sd-daemon.h"

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include "cgroup-util.h"

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include "dev-setup.h"

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#include "fileio.h"

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic bool debug;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannvoid udev_main_log(struct udev *udev, int priority,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann const char *file, int line, const char *fn,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann const char *format, va_list args)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_metav(priority, file, line, fn, format, args);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic struct udev_rules *rules;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic struct udev_ctrl *udev_ctrl;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic struct udev_monitor *monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int worker_watch[2] = { -1, -1 };

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int fd_signal = -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int fd_ep = -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int fd_inotify = -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic bool stop_exec_queue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic bool reload;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int children;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int children_max;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int exec_delay;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic sigset_t sigmask_orig;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic UDEV_LIST(event_list);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic UDEV_LIST(worker_list);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic char *udev_cgroup;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic bool udev_exit;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannenum event_state {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann EVENT_UNDEF,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann EVENT_QUEUED,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann EVENT_RUNNING,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann};

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstruct event {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node node;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev *udev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_device *dev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann enum event_state state;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int exitcode;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann unsigned long long int delaying_seqnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann unsigned long long int seqnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann const char *devpath;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann size_t devpath_len;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann const char *devpath_old;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann dev_t devnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int ifindex;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann bool is_block;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#ifdef HAVE_FIRMWARE

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann bool nodelay;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#endif

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann};

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic inline struct event *node_to_event(struct udev_list_node *node)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return container_of(node, struct event, node);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void event_queue_cleanup(struct udev *udev, enum event_state type);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannenum worker_state {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann WORKER_UNDEF,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann WORKER_RUNNING,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann WORKER_IDLE,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann WORKER_KILLED,

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann};

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstruct worker {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node node;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev *udev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int refcount;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid_t pid;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_monitor *monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann enum worker_state state;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct event *event;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann usec_t event_start_usec;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann};

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstruct worker_message {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid_t pid;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int exitcode;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann};

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic inline struct worker *node_to_worker(struct udev_list_node *node)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return container_of(node, struct worker, node);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void event_queue_delete(struct event *event)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_remove(&event->node);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_device_unref(event->dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann free(event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic struct worker *worker_ref(struct worker *worker)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->refcount++;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return worker;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void worker_cleanup(struct worker *worker)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_remove(&worker->node);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_unref(worker->monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann children--;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann free(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void worker_unref(struct worker *worker)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->refcount--;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->refcount > 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("worker [%u] cleaned up", worker->pid);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_cleanup(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void worker_list_cleanup(struct udev *udev)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop, *tmp;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach_safe(loop, tmp, &worker_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker *worker = node_to_worker(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_cleanup(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void worker_new(struct event *event)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev *udev = event->udev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker *worker;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_monitor *worker_monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid_t pid;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* listen for new events */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_monitor = udev_monitor_new_from_netlink(udev, NULL);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker_monitor == NULL)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* allow the main daemon netlink address to send devices to the worker */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_allow_unicast_sender(worker_monitor, monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_enable_receiving(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker = new0(struct worker, 1);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker == NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_unref(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* worker + event reference */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->refcount = 2;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->udev = udev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid = fork();

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann switch (pid) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case 0: {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_device *dev = NULL;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int fd_monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct epoll_event ep_signal, ep_monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann sigset_t mask;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int rc = EXIT_SUCCESS;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* take initial device from queue */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann dev = event->dev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->dev = NULL;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann free(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_list_cleanup(udev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event_queue_cleanup(udev, EVENT_UNDEF);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_unref(monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_ctrl_unref(udev_ctrl);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(fd_signal);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(fd_ep);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(worker_watch[READ_END]);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann sigfillset(&mask);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (fd_signal < 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("error creating signalfd %m");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann rc = 2;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann fd_ep = epoll_create1(EPOLL_CLOEXEC);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (fd_ep < 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("error creating epoll fd: %m");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann rc = 3;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann memzero(&ep_signal, sizeof(struct epoll_event));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ep_signal.events = EPOLLIN;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ep_signal.data.fd = fd_signal;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann fd_monitor = udev_monitor_get_fd(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann memzero(&ep_monitor, sizeof(struct epoll_event));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ep_monitor.events = EPOLLIN;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ep_monitor.data.fd = fd_monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 ||

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("fail to add fds to epoll: %m");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann rc = 4;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* request TERM signal if parent exits */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann prctl(PR_SET_PDEATHSIG, SIGTERM);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* reset OOM score, we only protect the main daemon */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann write_string_file("/proc/self/oom_score_adj", "0");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann for (;;) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_event *udev_event;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker_message msg;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int err;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("seq %llu running", udev_device_get_seqnum(dev));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_event = udev_event_new(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_event == NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann rc = 5;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* needed for SIGCHLD/SIGTERM in spawn() */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_event->fd_signal = fd_signal;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (exec_delay > 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_event->exec_delay = exec_delay;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* apply rules, create node, symlinks */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann err = udev_event_execute_rules(udev_event, rules, &sigmask_orig);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (err == 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_event_execute_run(udev_event, &sigmask_orig);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* apply/restore inotify watch */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (err == 0 && udev_event->inotify_watch) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_watch_begin(udev, dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_device_update_db(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* send processed event back to libudev listeners */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_send_device(worker_monitor, NULL, dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* send udevd the result of the event execution */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann memzero(&msg, sizeof(struct worker_message));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (err != 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann msg.exitcode = err;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann msg.pid = getpid();

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("seq %llu processed with %i", udev_device_get_seqnum(dev), err);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_device_unref(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann dev = NULL;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_event->sigterm) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_event_unref(udev_event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_event_unref(udev_event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* wait for more device messages from main udevd, or term signal */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann while (dev == NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct epoll_event ev[4];

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int fdcount;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int i;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (fdcount < 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (errno == EINTR)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("failed to poll: %m");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann for (i = 0; i < fdcount; i++) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann dev = udev_monitor_receive_device(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct signalfd_siginfo fdsi;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ssize_t size;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (size != sizeof(struct signalfd_siginfo))

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann switch (fdsi.ssi_signo) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case SIGTERM:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannout:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_device_unref(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (fd_signal >= 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(fd_signal);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (fd_ep >= 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(fd_ep);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(fd_inotify);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(worker_watch[WRITE_END]);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_rules_unref(rules);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_builtin_exit(udev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_unref(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_unref(udev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_close();

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann exit(rc);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case -1:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_unref(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->state = EVENT_QUEUED;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann free(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("fork of child failed: %m");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann default:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* close monitor, but keep address around */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_monitor_disconnect(worker_monitor);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->monitor = worker_monitor;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->pid = pid;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->state = WORKER_RUNNING;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event_start_usec = now(CLOCK_MONOTONIC);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event = event;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->state = EVENT_RUNNING;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_append(&worker->node, &worker_list);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann children++;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("seq %llu forked new worker [%u]", udev_device_get_seqnum(event->dev), pid);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void event_run(struct event *event)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach(loop, &worker_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker *worker = node_to_worker(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ssize_t count;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->state != WORKER_IDLE)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann count = udev_monitor_send_device(monitor, worker->monitor, event->dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (count < 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] did not accept message %zi (%m), kill it", worker->pid, count);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann kill(worker->pid, SIGKILL);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->state = WORKER_KILLED;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_ref(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event = event;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->state = WORKER_RUNNING;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event_start_usec = now(CLOCK_MONOTONIC);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->state = EVENT_RUNNING;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (children >= children_max) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (children_max > 1)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("maximum number (%i) of children reached", children);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* start new worker and pass initial device */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_new(event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int event_queue_insert(struct udev_device *dev)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct event *event;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event = new0(struct event, 1);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event == NULL)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->udev = udev_device_get_udev(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->dev = dev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->seqnum = udev_device_get_seqnum(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->devpath = udev_device_get_devpath(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->devpath_len = strlen(event->devpath);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->devpath_old = udev_device_get_devpath_old(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->devnum = udev_device_get_devnum(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->is_block = streq("block", udev_device_get_subsystem(dev));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->ifindex = udev_device_get_ifindex(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#ifdef HAVE_FIRMWARE

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (streq(udev_device_get_subsystem(dev), "firmware"))

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->nodelay = true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#endif

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_device_get_action(dev), udev_device_get_subsystem(dev));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->state = EVENT_QUEUED;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_append(&event->node, &event_list);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return 0;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void worker_kill(struct udev *udev)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach(loop, &worker_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker *worker = node_to_worker(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->state == WORKER_KILLED)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->state = WORKER_KILLED;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann kill(worker->pid, SIGTERM);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic bool is_devpath_busy(struct event *event)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann size_t common;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* check if queue contains events we depend on */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach(loop, &event_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct event *loop_event = node_to_event(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* we already found a later event, earlier can not block us, no need to check again */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (loop_event->seqnum < event->delaying_seqnum)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* event we checked earlier still exists, no need to check again */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (loop_event->seqnum == event->delaying_seqnum)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* found ourself, no later event can block us */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (loop_event->seqnum >= event->seqnum)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* check major/minor */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* check network device ifindex */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event->ifindex != 0 && event->ifindex == loop_event->ifindex)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* check our old name */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event->devpath_old != NULL && streq(loop_event->devpath, event->devpath_old)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->delaying_seqnum = loop_event->seqnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* compare devpath */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann common = MIN(loop_event->devpath_len, event->devpath_len);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* one devpath is contained in the other? */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (memcmp(loop_event->devpath, event->devpath, common) != 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* identical device event found */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (loop_event->devpath_len == event->devpath_len) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* devices names might have changed/swapped in the meantime */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (major(event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block))

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event->ifindex != 0 && event->ifindex != loop_event->ifindex)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->delaying_seqnum = loop_event->seqnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#ifdef HAVE_FIRMWARE

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* allow to bypass the dependency tracking */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event->nodelay)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann#endif

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* parent device event found */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event->devpath[common] == '/') {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->delaying_seqnum = loop_event->seqnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* child device event found */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (loop_event->devpath[common] == '/') {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event->delaying_seqnum = loop_event->seqnum;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* no matching device */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return false;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void event_queue_start(struct udev *udev)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach(loop, &event_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct event *event = node_to_event(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (event->state != EVENT_QUEUED)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* do not start event if parent or child event is still running */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (is_devpath_busy(event))

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event_run(event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void event_queue_cleanup(struct udev *udev, enum event_state match_type)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop, *tmp;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach_safe(loop, tmp, &event_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct event *event = node_to_event(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (match_type != EVENT_UNDEF && match_type != event->state)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event_queue_delete(event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void worker_returned(int fd_worker)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann for (;;) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker_message msg;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ssize_t size;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann size = recv(fd_worker, &msg, sizeof(struct worker_message), MSG_DONTWAIT);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (size != sizeof(struct worker_message))

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* lookup worker who sent the signal */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach(loop, &worker_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker *worker = node_to_worker(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->pid != msg.pid)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* worker returned */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->event) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event->exitcode = msg.exitcode;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event_queue_delete(worker->event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event = NULL;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->state != WORKER_KILLED)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->state = WORKER_IDLE;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_unref(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic struct udev_ctrl_connection *handle_ctrl_msg(struct udev_ctrl *uctrl)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev *udev = udev_ctrl_get_udev(uctrl);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_ctrl_connection *ctrl_conn;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_ctrl_msg *ctrl_msg = NULL;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann const char *str;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int i;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ctrl_conn = udev_ctrl_get_connection(uctrl);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ctrl_conn == NULL)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ctrl_msg = udev_ctrl_receive_msg(ctrl_conn);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ctrl_msg == NULL)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann goto out;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann i = udev_ctrl_get_set_log_level(ctrl_msg);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (i >= 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_set_max_level(i);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_set_log_priority(udev, i);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_kill(udev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (STOP_EXEC_QUEUE) received");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann stop_exec_queue = true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (START_EXEC_QUEUE) received");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann stop_exec_queue = false;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_ctrl_get_reload(ctrl_msg) > 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (RELOAD) received");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann reload = true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann str = udev_ctrl_get_set_env(ctrl_msg);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (str != NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann char *key;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann key = strdup(str);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (key != NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann char *val;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann val = strchr(key, '=');

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (val != NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann val[0] = '\0';

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann val = &val[1];

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (val[0] == '\0') {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (ENV) received, unset '%s'", key);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_add_property(udev, key, NULL);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (ENV) received, set '%s=%s'", key, val);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_add_property(udev, key, val);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("wrong key format '%s'", key);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann free(key);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_kill(udev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann i = udev_ctrl_get_set_children_max(ctrl_msg);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (i >= 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann children_max = i;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_ctrl_get_ping(ctrl_msg) > 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (SYNC) received");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (udev_ctrl_get_exit(ctrl_msg) > 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("udevd message (EXIT) received");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_exit = true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* keep reference to block the client until we exit */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_ctrl_connection_ref(ctrl_conn);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannout:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_ctrl_msg_unref(ctrl_msg);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return udev_ctrl_connection_unref(ctrl_conn);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int handle_inotify(struct udev *udev)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int nbytes, pos;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann char *buf;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct inotify_event *ev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if ((ioctl(fd_inotify, FIONREAD, &nbytes) < 0) || (nbytes <= 0))

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return 0;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann buf = malloc(nbytes);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (buf == NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("error getting buffer for inotify");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann nbytes = read(fd_inotify, buf, nbytes);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann for (pos = 0; pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_device *dev;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ev = (struct inotify_event *)(buf + pos);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann dev = udev_watch_lookup(udev, ev->wd);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (dev != NULL) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("inotify event: %x for %s", ev->mask, udev_device_get_devnode(dev));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ev->mask & IN_CLOSE_WRITE) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann char filename[UTIL_PATH_SIZE];

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int fd;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann fd = open(filename, O_WRONLY|O_CLOEXEC);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (fd >= 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (write(fd, "change", 6) < 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("error writing uevent: %m");

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann close(fd);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ev->mask & IN_IGNORED)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_watch_end(udev, dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_device_unref(dev);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann free(buf);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return 0;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void handle_signal(struct udev *udev, int signo)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann switch (signo) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case SIGINT:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case SIGTERM:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_exit = true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case SIGCHLD:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann for (;;) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid_t pid;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int status;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct udev_list_node *loop, *tmp;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid = waitpid(-1, &status, WNOHANG);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (pid <= 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann udev_list_node_foreach_safe(loop, tmp, &worker_list) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann struct worker *worker = node_to_worker(loop);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->pid != pid)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("worker [%u] exit", pid);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (WIFEXITED(status)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (WEXITSTATUS(status) != 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] exit with return code %i",

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid, WEXITSTATUS(status));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else if (WIFSIGNALED(status)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] terminated by signal %i (%s)",

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid, WTERMSIG(status), strsignal(WTERMSIG(status)));

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else if (WIFSTOPPED(status)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] stopped", pid);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else if (WIFCONTINUED(status)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] continued", pid);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann } else {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] exit with status 0x%04x", pid, status);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (worker->event) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_error("worker [%u] failed while handling '%s'",

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann pid, worker->event->devpath);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker->event->exitcode = -32;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann event_queue_delete(worker->event);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann /* drop reference taken for state 'running' */

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_unref(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann worker_unref(worker);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann case SIGHUP:

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann reload = true;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann break;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic int systemd_fds(struct udev *udev, int *rctrl, int *rnetlink)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int ctrl = -1, netlink = -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int fd, n;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann n = sd_listen_fds(true);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (n <= 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ctrl >= 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann ctrl = fd;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1)) {

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (netlink >= 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann netlink = fd;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann continue;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann }

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (ctrl < 0 || netlink < 0)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return -1;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann log_debug("ctrl=%i netlink=%i", ctrl, netlink);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann *rctrl = ctrl;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann *rnetlink = netlink;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann return 0;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann}

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmannstatic void kernel_cmdline_options(struct udev *udev)

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann{

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann _cleanup_free_ char *line = NULL;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann char *w, *state;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann size_t l;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann int r;

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann r = proc_cmdline(&line);

c0395aeb903cde25bd9e81fba3334f63335fe0efDavid Herrmann if (r < 0)

log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));

if (r <= 0)

return;

FOREACH_WORD_QUOTED(w, l, line, state) {

char *s, *opt;

s = strndup(w, l);

if (!s)

break;

/* accept the same options for the initrd, prefixed with "rd." */

if (in_initrd() && startswith(s, "rd."))

opt = s + 3;

else

opt = s;

if (startswith(opt, "udev.log-priority=")) {

int prio;

prio = util_log_priority(opt + 18);

log_set_max_level(prio);

udev_set_log_priority(udev, prio);

} else if (startswith(opt, "udev.children-max=")) {

children_max = strtoul(opt + 18, NULL, 0);

} else if (startswith(opt, "udev.exec-delay=")) {

exec_delay = strtoul(opt + 16, NULL, 0);

}

free(s);

}

}

int main(int argc, char *argv[])

{

struct udev *udev;

sigset_t mask;

int daemonize = false;

int resolve_names = 1;

static const struct option options[] = {

{ "daemon", no_argument, NULL, 'd' },

{ "debug", no_argument, NULL, 'D' },

{ "children-max", required_argument, NULL, 'c' },

{ "exec-delay", required_argument, NULL, 'e' },

{ "resolve-names", required_argument, NULL, 'N' },

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, 'V' },

{}

};

int fd_ctrl = -1;

int fd_netlink = -1;

int fd_worker = -1;

struct epoll_event ep_ctrl, ep_inotify, ep_signal, ep_netlink, ep_worker;

struct udev_ctrl_connection *ctrl_conn = NULL;

int rc = 1;

udev = udev_new();

if (udev == NULL)

goto exit;

log_set_target(LOG_TARGET_AUTO);

log_parse_environment();

log_open();

udev_set_log_fn(udev, udev_main_log);

log_set_max_level(udev_get_log_priority(udev));

log_debug("version %s", VERSION);

label_init("/dev");

for (;;) {

int option;

option = getopt_long(argc, argv, "c:de:DtN:hV", options, NULL);

if (option == -1)

break;

switch (option) {

case 'd':

daemonize = true;

break;

case 'c':

children_max = strtoul(optarg, NULL, 0);

break;

case 'e':

exec_delay = strtoul(optarg, NULL, 0);

break;

case 'D':

debug = true;

log_set_max_level(LOG_DEBUG);

udev_set_log_priority(udev, LOG_DEBUG);

break;

case 'N':

if (streq(optarg, "early")) {

resolve_names = 1;

} else if (streq(optarg, "late")) {

resolve_names = 0;

} else if (streq(optarg, "never")) {

resolve_names = -1;

} else {

fprintf(stderr, "resolve-names must be early, late or never\n");

log_error("resolve-names must be early, late or never");

goto exit;

}

break;

case 'h':

printf("Usage: udevd OPTIONS\n"

" --daemon\n"

" --debug\n"

" --children-max=<maximum number of workers>\n"

" --exec-delay=<seconds to wait before executing RUN=>\n"

" --resolve-names=early|late|never\n"

" --version\n"

" --help\n"

"\n");

goto exit;

case 'V':

printf("%s\n", VERSION);

goto exit;

default:

goto exit;

}

}

kernel_cmdline_options(udev);

if (getuid() != 0) {

fprintf(stderr, "root privileges required\n");

log_error("root privileges required");

goto exit;

}

/* set umask before creating any file/directory */

chdir("/");

umask(022);

mkdir("/run/udev", 0755);

dev_setup(NULL);

/* before opening new files, make sure std{in,out,err} fds are in a sane state */

if (daemonize) {

int fd;

fd = open("/dev/null", O_RDWR);

if (fd >= 0) {

if (write(STDOUT_FILENO, 0, 0) < 0)

dup2(fd, STDOUT_FILENO);

if (write(STDERR_FILENO, 0, 0) < 0)

dup2(fd, STDERR_FILENO);

if (fd > STDERR_FILENO)

close(fd);

} else {

fprintf(stderr, "cannot open /dev/null\n");

log_error("cannot open /dev/null");

}

}

if (systemd_fds(udev, &fd_ctrl, &fd_netlink) >= 0) {

/* get control and netlink socket from systemd */

udev_ctrl = udev_ctrl_new_from_fd(udev, fd_ctrl);

if (udev_ctrl == NULL) {

log_error("error taking over udev control socket");

rc = 1;

goto exit;

}

monitor = udev_monitor_new_from_netlink_fd(udev, "kernel", fd_netlink);

if (monitor == NULL) {

log_error("error taking over netlink socket");

rc = 3;

goto exit;

}

/* get our own cgroup, we regularly kill everything udev has left behind */

if (cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &udev_cgroup) < 0)

udev_cgroup = NULL;

} else {

/* open control and netlink socket */

udev_ctrl = udev_ctrl_new(udev);

if (udev_ctrl == NULL) {

fprintf(stderr, "error initializing udev control socket");

log_error("error initializing udev control socket");

rc = 1;

goto exit;

}

fd_ctrl = udev_ctrl_get_fd(udev_ctrl);

monitor = udev_monitor_new_from_netlink(udev, "kernel");

if (monitor == NULL) {

fprintf(stderr, "error initializing netlink socket\n");

log_error("error initializing netlink socket");

rc = 3;

goto exit;

}

fd_netlink = udev_monitor_get_fd(monitor);

}

if (udev_monitor_enable_receiving(monitor) < 0) {

fprintf(stderr, "error binding netlink socket\n");

log_error("error binding netlink socket");

rc = 3;

goto exit;

}

if (udev_ctrl_enable_receiving(udev_ctrl) < 0) {

fprintf(stderr, "error binding udev control socket\n");

log_error("error binding udev control socket");

rc = 1;

goto exit;

}

udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024);

if (daemonize) {

pid_t pid;

pid = fork();

switch (pid) {

case 0:

break;

case -1:

log_error("fork of daemon failed: %m");

rc = 4;

goto exit;

default:

rc = EXIT_SUCCESS;

goto exit_daemonize;

}

setsid();

write_string_file("/proc/self/oom_score_adj", "-1000");

} else {

sd_notify(1, "READY=1");

}

print_kmsg("starting version " VERSION "\n");

if (!debug) {

int fd;

fd = open("/dev/null", O_RDWR);

if (fd >= 0) {

dup2(fd, STDIN_FILENO);

dup2(fd, STDOUT_FILENO);

dup2(fd, STDERR_FILENO);

close(fd);

}

}

fd_inotify = udev_watch_init(udev);

if (fd_inotify < 0) {

fprintf(stderr, "error initializing inotify\n");

log_error("error initializing inotify");

rc = 4;

goto exit;

}

udev_watch_restore(udev);

/* block and listen to all signals on signalfd */

sigfillset(&mask);

sigprocmask(SIG_SETMASK, &mask, &sigmask_orig);

fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);

if (fd_signal < 0) {

fprintf(stderr, "error creating signalfd\n");

log_error("error creating signalfd");

rc = 5;

goto exit;

}

/* unnamed socket from workers to the main daemon */

if (socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, worker_watch) < 0) {

fprintf(stderr, "error creating socketpair\n");

log_error("error creating socketpair");

rc = 6;

goto exit;

}

fd_worker = worker_watch[READ_END];

udev_builtin_init(udev);

rules = udev_rules_new(udev, resolve_names);

if (rules == NULL) {

log_error("error reading rules");

goto exit;

}

memzero(&ep_ctrl, sizeof(struct epoll_event));

ep_ctrl.events = EPOLLIN;

ep_ctrl.data.fd = fd_ctrl;

memzero(&ep_inotify, sizeof(struct epoll_event));

ep_inotify.events = EPOLLIN;

ep_inotify.data.fd = fd_inotify;

memzero(&ep_signal, sizeof(struct epoll_event));

ep_signal.events = EPOLLIN;

ep_signal.data.fd = fd_signal;

memzero(&ep_netlink, sizeof(struct epoll_event));

ep_netlink.events = EPOLLIN;

ep_netlink.data.fd = fd_netlink;

memzero(&ep_worker, sizeof(struct epoll_event));

ep_worker.events = EPOLLIN;

ep_worker.data.fd = fd_worker;

fd_ep = epoll_create1(EPOLL_CLOEXEC);

if (fd_ep < 0) {

log_error("error creating epoll fd: %m");

goto exit;

}

if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_ctrl, &ep_ctrl) < 0 ||

epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_inotify, &ep_inotify) < 0 ||

epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 ||

epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_netlink, &ep_netlink) < 0 ||

epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_worker, &ep_worker) < 0) {

log_error("fail to add fds to epoll: %m");

goto exit;

}

if (children_max <= 0) {

cpu_set_t cpu_set;

children_max = 8;

if (sched_getaffinity(0, sizeof (cpu_set), &cpu_set) == 0) {

children_max += CPU_COUNT(&cpu_set) * 2;

}

}

log_debug("set children_max to %u", children_max);

rc = udev_rules_apply_static_dev_perms(rules);

if (rc < 0)

log_error("failed to apply permissions on static device nodes - %s", strerror(-rc));

udev_list_node_init(&event_list);

udev_list_node_init(&worker_list);

for (;;) {

static usec_t last_usec;

struct epoll_event ev[8];

int fdcount;

int timeout;

bool is_worker, is_signal, is_inotify, is_netlink, is_ctrl;

int i;

if (udev_exit) {

/* close sources of new events and discard buffered events */

if (fd_ctrl >= 0) {

epoll_ctl(fd_ep, EPOLL_CTL_DEL, fd_ctrl, NULL);

fd_ctrl = -1;

}

if (monitor != NULL) {

epoll_ctl(fd_ep, EPOLL_CTL_DEL, fd_netlink, NULL);

udev_monitor_unref(monitor);

monitor = NULL;

}

if (fd_inotify >= 0) {

epoll_ctl(fd_ep, EPOLL_CTL_DEL, fd_inotify, NULL);

close(fd_inotify);

fd_inotify = -1;

}

/* discard queued events and kill workers */

event_queue_cleanup(udev, EVENT_QUEUED);

worker_kill(udev);

/* exit after all has cleaned up */

if (udev_list_node_is_empty(&event_list) && children == 0)

break;

/* timeout at exit for workers to finish */

timeout = 30 * MSEC_PER_SEC;

} else if (udev_list_node_is_empty(&event_list) && children == 0) {

/* we are idle */

timeout = -1;

/* cleanup possible left-over processes in our cgroup */

if (udev_cgroup)

cg_kill(SYSTEMD_CGROUP_CONTROLLER, udev_cgroup, SIGKILL, false, true, NULL);

} else {

/* kill idle or hanging workers */

timeout = 3 * MSEC_PER_SEC;

}

/* tell settle that we are busy or idle */

if (!udev_list_node_is_empty(&event_list)) {

int fd;

fd = open("/run/udev/queue", O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);

if (fd >= 0)

close(fd);

} else {

unlink("/run/udev/queue");

}

fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout);

if (fdcount < 0)

continue;

if (fdcount == 0) {

struct udev_list_node *loop;

/* timeout */

if (udev_exit) {

log_error("timeout, giving up waiting for workers to finish");

break;

}

/* kill idle workers */

if (udev_list_node_is_empty(&event_list)) {

log_debug("cleanup idle workers");

worker_kill(udev);

}

/* check for hanging events */

udev_list_node_foreach(loop, &worker_list) {

struct worker *worker = node_to_worker(loop);

if (worker->state != WORKER_RUNNING)

continue;

if ((now(CLOCK_MONOTONIC) - worker->event_start_usec) > 30 * USEC_PER_SEC) {

log_error("worker [%u] %s timeout; kill it", worker->pid,

worker->event ? worker->event->devpath : "<idle>");

kill(worker->pid, SIGKILL);

worker->state = WORKER_KILLED;

/* drop reference taken for state 'running' */

worker_unref(worker);

if (worker->event) {

log_error("seq %llu '%s' killed", udev_device_get_seqnum(worker->event->dev), worker->event->devpath);

worker->event->exitcode = -64;

event_queue_delete(worker->event);

worker->event = NULL;

}

}

}

}

is_worker = is_signal = is_inotify = is_netlink = is_ctrl = false;

for (i = 0; i < fdcount; i++) {

if (ev[i].data.fd == fd_worker && ev[i].events & EPOLLIN)

is_worker = true;

else if (ev[i].data.fd == fd_netlink && ev[i].events & EPOLLIN)