af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#include <stddef.h>

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen#include <signal.h>

7eb08da4b388b920c8a894b1500c9cc7dc1f31efTom Gundersen#include <unistd.h>

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen#include <errno.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <stdio.h>

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#include <stdlib.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <stdbool.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <string.h>

a501033335ed402c8f7e86fe41a15531ba69abd7Tom Gundersen#include <ctype.h>

3ffd4af22052963e7a29431721ee204e634bea75Lennart Poettering#include <fcntl.h>

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen#include <time.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <getopt.h>

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#include <dirent.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <sys/time.h>

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen#include <sys/prctl.h>

c6f7c917a1b494d4455800823472227463f87438Tom Gundersen#include <sys/socket.h>

6bedfcbb2970e06a4d3280c8fb62083d252ede73Lennart Poettering#include <sys/un.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <sys/signalfd.h>

3df3e884ae1237ef0d4d23b0e80f4ffda95ac135Ronny Chevalier#include <sys/epoll.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <sys/poll.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <sys/wait.h>

07630cea1f3a845c09309f197ac7c4f11edd3b62Lennart Poettering#include <sys/stat.h>

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#include <sys/ioctl.h>

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#include <sys/inotify.h>

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#include <sys/utsname.h>

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

a501033335ed402c8f7e86fe41a15531ba69abd7Tom Gundersen#include "udev.h"

a501033335ed402c8f7e86fe41a15531ba69abd7Tom Gundersen#include "sd-daemon.h"

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen#include "cgroup-util.h"

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen#include "dev-setup.h"

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen#include "fileio.h"

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen

97f2d76d4f4dfab8b0629c09926a05a1e5621125Tom Gundersenstatic bool debug;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersenvoid udev_main_log(struct udev *udev, int priority,

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek const char *file, int line, const char *fn,

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek const char *format, va_list args)

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek{

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek log_metav(priority, file, line, fn, format, args);

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek}

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmekstatic struct udev_rules *rules;

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmekstatic struct udev_queue_export *udev_queue_export;

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmekstatic struct udev_ctrl *udev_ctrl;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic struct udev_monitor *monitor;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic int worker_watch[2] = { -1, -1 };

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic int fd_signal = -1;

5b9d4dc05560ddda89e48b6b39365824b15e1300Tom Gundersenstatic int fd_ep = -1;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic int fd_inotify = -1;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic bool stop_exec_queue;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic bool reload;

43d60b77a83b3185e37c65c4f2649d24c227c7f0Tom Gundersenstatic int children;

43d60b77a83b3185e37c65c4f2649d24c227c7f0Tom Gundersenstatic int children_max;

43d60b77a83b3185e37c65c4f2649d24c227c7f0Tom Gundersenstatic int exec_delay;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic sigset_t sigmask_orig;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic UDEV_LIST(event_list);

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic UDEV_LIST(worker_list);

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenchar *udev_cgroup;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic bool udev_exit;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenenum event_state {

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen EVENT_UNDEF,

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen EVENT_QUEUED,

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen EVENT_RUNNING,

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen};

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstruct event {

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen struct udev_list_node node;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen struct udev *udev;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen struct udev_device *dev;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen enum event_state state;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen int exitcode;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen unsigned long long int delaying_seqnum;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen unsigned long long int seqnum;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen const char *devpath;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen size_t devpath_len;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen const char *devpath_old;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen dev_t devnum;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen int ifindex;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen bool is_block;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#ifdef HAVE_FIRMWARE

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen bool nodelay;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen#endif

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen};

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

03e334a1c7dc8c20c38902aa039440763acc9b17Lennart Poetteringstatic inline struct event *node_to_event(struct udev_list_node *node)

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen{

1c4baffc1895809bae9ac36b670af90a4cb9cd7dTom Gundersen return container_of(node, struct event, node);

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen}

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersenstatic void event_queue_cleanup(struct udev *udev, enum event_state type);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersenenum worker_state {

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen WORKER_UNDEF,

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen WORKER_RUNNING,

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen WORKER_IDLE,

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen WORKER_KILLED,

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen};

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstruct worker {

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen struct udev_list_node node;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen struct udev *udev;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen int refcount;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen pid_t pid;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen struct udev_monitor *monitor;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen enum worker_state state;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen struct event *event;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen usec_t event_start_usec;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen};

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstruct worker_message {

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen pid_t pid;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen int exitcode;

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen};

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic inline struct worker *node_to_worker(struct udev_list_node *node)

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen{

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen return container_of(node, struct worker, node);

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersen}

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

9a4b012e43f23516373bf398dd9a458439d19939Tom Gundersenstatic void event_queue_delete(struct event *event, bool export)

6e37cd2f4af8928d905203108a4331e375d7127cThomas Hindoe Paaboel Andersen{

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_list_node_remove(&event->node);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

187dc6e554f2d5b4b5a3bee72c73ff5df6418aa6Thomas Hindoe Paaboel Andersen if (export) {

187dc6e554f2d5b4b5a3bee72c73ff5df6418aa6Thomas Hindoe Paaboel Andersen udev_queue_export_device_finished(udev_queue_export, event->dev);

187dc6e554f2d5b4b5a3bee72c73ff5df6418aa6Thomas Hindoe Paaboel Andersen log_debug("seq %llu done with %i\n", udev_device_get_seqnum(event->dev), event->exitcode);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen }

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_device_unref(event->dev);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen free(event);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen}

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

ecb08ec6a5c52f2d940f3b8147e2a480affd46e1Zbigniew Jędrzejewski-Szmekstatic struct worker *worker_ref(struct worker *worker)

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen{

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen worker->refcount++;

ed88bcfb7c15029f9fc95ee2380759a9eb782d46Zbigniew Jędrzejewski-Szmek return worker;

ed88bcfb7c15029f9fc95ee2380759a9eb782d46Zbigniew Jędrzejewski-Szmek}

ed88bcfb7c15029f9fc95ee2380759a9eb782d46Zbigniew Jędrzejewski-Szmek

ed88bcfb7c15029f9fc95ee2380759a9eb782d46Zbigniew Jędrzejewski-Szmekstatic void worker_cleanup(struct worker *worker)

ed88bcfb7c15029f9fc95ee2380759a9eb782d46Zbigniew Jędrzejewski-Szmek{

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_list_node_remove(&worker->node);

ecb08ec6a5c52f2d940f3b8147e2a480affd46e1Zbigniew Jędrzejewski-Szmek udev_monitor_unref(worker->monitor);

ecb08ec6a5c52f2d940f3b8147e2a480affd46e1Zbigniew Jędrzejewski-Szmek children--;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen free(worker);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen}

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersenstatic void worker_unref(struct worker *worker)

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen{

e9f3d2d508bfd9fb5b54e82994bda365a71eb864Zbigniew Jędrzejewski-Szmek worker->refcount--;

e9f3d2d508bfd9fb5b54e82994bda365a71eb864Zbigniew Jędrzejewski-Szmek if (worker->refcount > 0)

e9f3d2d508bfd9fb5b54e82994bda365a71eb864Zbigniew Jędrzejewski-Szmek return;

36f822c4bd077f9121757e24b6516e5c7ada63b5Zbigniew Jędrzejewski-Szmek log_debug("worker [%u] cleaned up\n", worker->pid);

36f822c4bd077f9121757e24b6516e5c7ada63b5Zbigniew Jędrzejewski-Szmek worker_cleanup(worker);

ecb08ec6a5c52f2d940f3b8147e2a480affd46e1Zbigniew Jędrzejewski-Szmek}

36f822c4bd077f9121757e24b6516e5c7ada63b5Zbigniew Jędrzejewski-Szmek

98a375f6d5cac24eb80d6d4e00699851324afdecTom Gundersenstatic void worker_list_cleanup(struct udev *udev)

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen{

dab495dc23bf9a5ba0487a057bb594355555a0e9Tom Gundersen struct udev_list_node *loop, *tmp;

dab495dc23bf9a5ba0487a057bb594355555a0e9Tom Gundersen

dab495dc23bf9a5ba0487a057bb594355555a0e9Tom Gundersen udev_list_node_foreach_safe(loop, tmp, &worker_list) {

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen struct worker *worker = node_to_worker(loop);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen worker_cleanup(worker);

ecb08ec6a5c52f2d940f3b8147e2a480affd46e1Zbigniew Jędrzejewski-Szmek }

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen}

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersenstatic void worker_new(struct event *event)

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen{

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen struct udev *udev = event->udev;

f8a0bb5285024b6ce372c3157e761e6543ebdcd2Andreas Henriksson struct worker *worker;

a2a5291b3f5ab6ed4c92f51d0fd10a03047380d8Zbigniew Jędrzejewski-Szmek struct udev_monitor *worker_monitor;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen pid_t pid;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen /* listen for new events */

74df0fca09b3c31ed19e14ba80f996fdff772417Lennart Poettering worker_monitor = udev_monitor_new_from_netlink(udev, NULL);

b5884878a2874447b2a9f07f324a7cd909d96d48Lennart Poettering if (worker_monitor == NULL)

da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt return;

74df0fca09b3c31ed19e14ba80f996fdff772417Lennart Poettering /* allow the main daemon netlink address to send devices to the worker */

b5884878a2874447b2a9f07f324a7cd909d96d48Lennart Poettering udev_monitor_allow_unicast_sender(worker_monitor, monitor);

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen udev_monitor_enable_receiving(worker_monitor);

a2a5291b3f5ab6ed4c92f51d0fd10a03047380d8Zbigniew Jędrzejewski-Szmek

a2a5291b3f5ab6ed4c92f51d0fd10a03047380d8Zbigniew Jędrzejewski-Szmek worker = calloc(1, sizeof(struct worker));

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen if (worker == NULL) {

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen udev_monitor_unref(worker_monitor);

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen return;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen }

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen /* worker + event reference */

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen worker->refcount = 2;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen worker->udev = udev;

edf029b7fd9a5853a87d3ca99aac2922bb8a277eTom Gundersen

edf029b7fd9a5853a87d3ca99aac2922bb8a277eTom Gundersen pid = fork();

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen switch (pid) {

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen case 0: {

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen struct udev_device *dev = NULL;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen int fd_monitor;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen struct epoll_event ep_signal, ep_monitor;

3f85ef0f05ffc51e19f86fb83a1c51e8e3cd6817Harald Hoyer sigset_t mask;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen int rc = EXIT_SUCCESS;

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen

97f2d76d4f4dfab8b0629c09926a05a1e5621125Tom Gundersen /* take initial device from queue */

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek dev = event->dev;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen event->dev = NULL;

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt free(worker);

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt worker_list_cleanup(udev);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen event_queue_cleanup(udev, EVENT_UNDEF);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_queue_export_unref(udev_queue_export);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_monitor_unref(monitor);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_ctrl_unref(udev_ctrl);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen close(fd_signal);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen close(fd_ep);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen close(worker_watch[READ_END]);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen sigfillset(&mask);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen if (fd_signal < 0) {

2ad8416dd057e7e3185169609ca3006e7649f576Zbigniew Jędrzejewski-Szmek log_error("error creating signalfd %m\n");

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen rc = 2;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen goto out;

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen }

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen fd_ep = epoll_create1(EPOLL_CLOEXEC);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen if (fd_ep < 0) {

3b64e4d4f40baac56148c7d333d6a0053358ec7aTom Gundersen log_error("error creating epoll fd: %m\n");

3b64e4d4f40baac56148c7d333d6a0053358ec7aTom Gundersen rc = 3;

3b64e4d4f40baac56148c7d333d6a0053358ec7aTom Gundersen goto out;

3b64e4d4f40baac56148c7d333d6a0053358ec7aTom Gundersen }

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

7eb08da4b388b920c8a894b1500c9cc7dc1f31efTom Gundersen memset(&ep_signal, 0, sizeof(struct epoll_event));

7eb08da4b388b920c8a894b1500c9cc7dc1f31efTom Gundersen ep_signal.events = EPOLLIN;

7eb08da4b388b920c8a894b1500c9cc7dc1f31efTom Gundersen ep_signal.data.fd = fd_signal;

b3e013148603aa670bc2c060ac63d48e54d76fc2Tom Gundersen

edbb03e95a3c31bf719d5c6c46eec14d0bcb9c8fTom Gundersen fd_monitor = udev_monitor_get_fd(worker_monitor);

7eb08da4b388b920c8a894b1500c9cc7dc1f31efTom Gundersen memset(&ep_monitor, 0, sizeof(struct epoll_event));

edbb03e95a3c31bf719d5c6c46eec14d0bcb9c8fTom Gundersen ep_monitor.events = EPOLLIN;

eb7040ec50fbfe5aad9eaf305bd442a4a235abaaTom Gundersen ep_monitor.data.fd = fd_monitor;

b3e013148603aa670bc2c060ac63d48e54d76fc2Tom Gundersen

9b1c2626cef16722603bded9bb52033aba34dd74Tom Gundersen if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 ||

bf175aafd20c9ef974709ef12c5acf836121af33Tom Gundersen epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) {

b3e013148603aa670bc2c060ac63d48e54d76fc2Tom Gundersen log_error("fail to add fds to epoll: %m\n");

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen rc = 4;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen goto out;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen }

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen /* request TERM signal if parent exits */

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen prctl(PR_SET_PDEATHSIG, SIGTERM);

dc75168823540076b354135f6e2de7a9a978fbcaZbigniew Jędrzejewski-Szmek

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen /* reset OOM score, we only protect the main daemon */

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen write_string_file("/proc/self/oom_score_adj", "0");

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen for (;;) {

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen struct udev_event *udev_event;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen struct worker_message msg;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen int err;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen log_debug("seq %llu running\n", udev_device_get_seqnum(dev));

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen udev_event = udev_event_new(dev);

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen if (udev_event == NULL) {

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen rc = 5;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen goto out;

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen }

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen /* needed for SIGCHLD/SIGTERM in spawn() */

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen udev_event->fd_signal = fd_signal;

32bc8adcd836baff68e4d0f53b9a382f358cccf8Tom Gundersen

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen if (exec_delay > 0)

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen udev_event->exec_delay = exec_delay;

ca6038b89645c0c1bd547d6a420bf95eb3d6f4ccTom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen /* apply rules, create node, symlinks */

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen err = udev_event_execute_rules(udev_event, rules, &sigmask_orig);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen if (err == 0)

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen udev_event_execute_run(udev_event, &sigmask_orig);

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen /* apply/restore inotify watch */

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen if (err == 0 && udev_event->inotify_watch) {

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_watch_begin(udev, dev);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_device_update_db(dev);

f1ac700248f231b7bdac2aafe8c35650efddb89fTom Gundersen }

f1ac700248f231b7bdac2aafe8c35650efddb89fTom Gundersen

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen /* send processed event back to libudev listeners */

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen udev_monitor_send_device(worker_monitor, NULL, dev);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen /* send udevd the result of the event execution */

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen memset(&msg, 0, sizeof(struct worker_message));

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen if (err != 0)

f1ac700248f231b7bdac2aafe8c35650efddb89fTom Gundersen msg.exitcode = err;

f1ac700248f231b7bdac2aafe8c35650efddb89fTom Gundersen msg.pid = getpid();

f1ac700248f231b7bdac2aafe8c35650efddb89fTom Gundersen send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen log_debug("seq %llu processed with %i\n", udev_device_get_seqnum(dev), err);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen udev_device_unref(dev);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen dev = NULL;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen if (udev_event->sigterm) {

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen udev_event_unref(udev_event);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen goto out;

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen }

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen udev_event_unref(udev_event);

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen /* wait for more device messages from main udevd, or term signal */

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen while (dev == NULL) {

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen struct epoll_event ev[4];

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen int fdcount;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen int i;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen if (fdcount < 0) {

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen if (errno == EINTR)

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen continue;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen log_error("failed to poll: %m\n");

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen goto out;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen }

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen for (i = 0; i < fdcount; i++) {

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) {

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen dev = udev_monitor_receive_device(worker_monitor);

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen break;

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) {

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen struct signalfd_siginfo fdsi;

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen ssize_t size;

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo));

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen if (size != sizeof(struct signalfd_siginfo))

9bf3b53533cdc9b95c921b71da755401f223f765Lennart Poettering continue;

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen switch (fdsi.ssi_signo) {

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen case SIGTERM:

9bf3b53533cdc9b95c921b71da755401f223f765Lennart Poettering goto out;

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen }

9bf3b53533cdc9b95c921b71da755401f223f765Lennart Poettering }

9bf3b53533cdc9b95c921b71da755401f223f765Lennart Poettering }

b5db00e52ee2e20578839e4e4488f7b9af9abc38Umut Tezduyar Lindskog }

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen }

55428d84f31b52da1c50b7469f14e15740547f20Tom Gundersenout:

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_device_unref(dev);

9bf3b53533cdc9b95c921b71da755401f223f765Lennart Poettering if (fd_signal >= 0)

9bf3b53533cdc9b95c921b71da755401f223f765Lennart Poettering close(fd_signal);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen if (fd_ep >= 0)

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen close(fd_ep);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen close(fd_inotify);

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen close(worker_watch[WRITE_END]);

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen udev_rules_unref(rules);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_builtin_exit(udev);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_monitor_unref(worker_monitor);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_unref(udev);

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen log_close();

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen exit(rc);

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen }

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen case -1:

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen udev_monitor_unref(worker_monitor);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen event->state = EVENT_QUEUED;

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen free(worker);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen log_error("fork of child failed: %m\n");

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen break;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen default:

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen /* close monitor, but keep address around */

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen udev_monitor_disconnect(worker_monitor);

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen worker->monitor = worker_monitor;

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen worker->pid = pid;

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen worker->state = WORKER_RUNNING;

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen worker->event_start_usec = now(CLOCK_MONOTONIC);

3e137a1b9a0eac2bf43d493d3302c3c959b6ccdbTom Gundersen worker->event = event;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen event->state = EVENT_RUNNING;

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_list_node_append(&worker->node, &worker_list);

dab495dc23bf9a5ba0487a057bb594355555a0e9Tom Gundersen children++;

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen log_debug("seq %llu forked new worker [%u]\n", udev_device_get_seqnum(event->dev), pid);

dab495dc23bf9a5ba0487a057bb594355555a0e9Tom Gundersen break;

755bde375f4db393ad06e73340bfcf4d0cf91bb2Lennart Poettering }

755bde375f4db393ad06e73340bfcf4d0cf91bb2Lennart Poettering}

a501033335ed402c8f7e86fe41a15531ba69abd7Tom Gundersen

aedca89268ed4fd6be41e55a605f011033ad1fb5Tom Gundersenstatic void event_run(struct event *event)

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen{

755bde375f4db393ad06e73340bfcf4d0cf91bb2Lennart Poettering struct udev_list_node *loop;

755bde375f4db393ad06e73340bfcf4d0cf91bb2Lennart Poettering

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersen udev_list_node_foreach(loop, &worker_list) {

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen struct worker *worker = node_to_worker(loop);

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen ssize_t count;

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen if (worker->state != WORKER_IDLE)

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen continue;

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen

f61942250a43a123580d7bbe5d7873dc5118ed97Tom Gundersen count = udev_monitor_send_device(monitor, worker->monitor, event->dev);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen if (count < 0) {

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen log_error("worker [%u] did not accept message %zi (%m), kill it\n", worker->pid, count);

68ba38770640413b4fa06773447666eb88a38d4cTom Gundersen kill(worker->pid, SIGKILL);

68ba38770640413b4fa06773447666eb88a38d4cTom Gundersen worker->state = WORKER_KILLED;

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen continue;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen }

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen worker_ref(worker);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen worker->event = event;

e51660ae56bb747ece2cab8fe6eec37f4d06a438Tom Gundersen worker->state = WORKER_RUNNING;

e51660ae56bb747ece2cab8fe6eec37f4d06a438Tom Gundersen worker->event_start_usec = now(CLOCK_MONOTONIC);

e51660ae56bb747ece2cab8fe6eec37f4d06a438Tom Gundersen event->state = EVENT_RUNNING;

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen return;

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen }

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen if (children >= children_max) {

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen if (children_max > 1)

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen log_debug("maximum number (%i) of children reached\n", children);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen return;

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen }

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen /* start new worker and pass initial device */

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen worker_new(event);

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen}

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersenstatic int event_queue_insert(struct udev_device *dev)

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen{

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen struct event *event;

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen

daeb71a36a98834664e4d95773a3629b746f4db8Tom Gundersen event = calloc(1, sizeof(struct event));

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen if (event == NULL)

3c9b886068d99e5d3cbabcac32a4decf37244c54Tom Gundersen return -1;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen event->udev = udev_device_get_udev(dev);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen event->dev = dev;

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen event->seqnum = udev_device_get_seqnum(dev);

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen event->devpath = udev_device_get_devpath(dev);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen event->devpath_len = strlen(event->devpath);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen event->devpath_old = udev_device_get_devpath_old(dev);

92d927f850d4b668b44f3e5f41e266d934d03726Tom Gundersen event->devnum = udev_device_get_devnum(dev);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen event->is_block = streq("block", udev_device_get_subsystem(dev));

1c25683e0f40c6169676cc44fa1897082597feecTom Gundersen event->ifindex = udev_device_get_ifindex(dev);

1c25683e0f40c6169676cc44fa1897082597feecTom Gundersen#ifdef HAVE_FIRMWARE

a669ea9860900d5cdebbc4cb9aaea72db7e28a02Tom Gundersen if (streq(udev_device_get_subsystem(dev), "firmware"))

1c25683e0f40c6169676cc44fa1897082597feecTom Gundersen event->nodelay = true;

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen#endif

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen udev_queue_export_device_queued(udev_queue_export, dev);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen log_debug("seq %llu queued, '%s' '%s'\n", udev_device_get_seqnum(dev),

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen udev_device_get_action(dev), udev_device_get_subsystem(dev));

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen event->state = EVENT_QUEUED;

1c25683e0f40c6169676cc44fa1897082597feecTom Gundersen udev_list_node_append(&event->node, &event_list);

1c25683e0f40c6169676cc44fa1897082597feecTom Gundersen return 0;

a669ea9860900d5cdebbc4cb9aaea72db7e28a02Tom Gundersen}

1c25683e0f40c6169676cc44fa1897082597feecTom Gundersen

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersenstatic void worker_kill(struct udev *udev)

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen{

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen struct udev_list_node *loop;

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen

66d3752e812915a549ebee01769ee761c1495667Jacob Keller udev_list_node_foreach(loop, &worker_list) {

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen struct worker *worker = node_to_worker(loop);

5fde13d748749f0e06e2e6cdd15f0980a79ea82cTom Gundersen

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen if (worker->state == WORKER_KILLED)

16b9b87aeee9353b5b8dae6089a69752422a5b09Tom Gundersen continue;

dab495dc23bf9a5ba0487a057bb594355555a0e9Tom Gundersen

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt worker->state = WORKER_KILLED;

f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt kill(worker->pid, SIGTERM);

43b3a5ef61859f06cdbaf26765cab8e1adac4296Tom Gundersen }

d95b83b87d7d7c50e550f7128827f73a321c8934Tom Gundersen}

d95b83b87d7d7c50e550f7128827f73a321c8934Tom Gundersen

af6f0d422c521374ee6a2dd92df5935a5a476ae5Tom Gundersenstatic bool is_devpath_busy(struct event *event)

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen{

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen struct udev_list_node *loop;

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen size_t common;

a7f7d1bde43fc825c49afea3f946f5b4b3d563e0Harald Hoyer

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen /* check if queue contains events we depend on */

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen udev_list_node_foreach(loop, &event_list) {

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen struct event *loop_event = node_to_event(loop);

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen /* we already found a later event, earlier can not block us, no need to check again */

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen if (loop_event->seqnum < event->delaying_seqnum)

aedca89268ed4fd6be41e55a605f011033ad1fb5Tom Gundersen continue;

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen /* event we checked earlier still exists, no need to check again */

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen if (loop_event->seqnum == event->delaying_seqnum)

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen return true;

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen /* found ourself, no later event can block us */

847a8a5fed4d265dfa659917515c6f9bd1b8d5c4Tom Gundersen if (loop_event->seqnum >= event->seqnum)

2c5859afecee81e345fc9526b1083bf79990ffb8Daniel Mack break;

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen

66d3752e812915a549ebee01769ee761c1495667Jacob Keller /* check major/minor */

66d3752e812915a549ebee01769ee761c1495667Jacob Keller if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen return true;

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen /* check network device ifindex */

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen if (event->ifindex != 0 && event->ifindex == loop_event->ifindex)

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen return true;

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen

2c5859afecee81e345fc9526b1083bf79990ffb8Daniel Mack /* check our old name */

04b67d49254d956d31bcfe80340fb9df7ed332d3Tom Gundersen if (event->devpath_old != NULL && streq(loop_event->devpath, event->devpath_old)) {

e51660ae56bb747ece2cab8fe6eec37f4d06a438Tom Gundersen event->delaying_seqnum = loop_event->seqnum;

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen return true;

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen }

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen /* compare devpath */

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen common = MIN(loop_event->devpath_len, event->devpath_len);

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen

be32eb9b7fbcb22e4b648086d644135e38279633Tom Gundersen /* one devpath is contained in the other? */

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen if (memcmp(loop_event->devpath, event->devpath, common) != 0)

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen continue;

464cf22f17e0cf2d8bfa6d72b5e7a662d634f149Tom Gundersen

/* identical device event found */

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

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

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

continue;

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

continue;

event->delaying_seqnum = loop_event->seqnum;

return true;

}

#ifdef HAVE_FIRMWARE

/* allow to bypass the dependency tracking */

if (event->nodelay)

continue;

#endif

/* parent device event found */

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

event->delaying_seqnum = loop_event->seqnum;

return true;

}

/* child device event found */

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

event->delaying_seqnum = loop_event->seqnum;

return true;

}

/* no matching device */

continue;

}

return false;

}

static void event_queue_start(struct udev *udev)

{

struct udev_list_node *loop;

udev_list_node_foreach(loop, &event_list) {

struct event *event = node_to_event(loop);

if (event->state != EVENT_QUEUED)

continue;

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

if (is_devpath_busy(event))

continue;

event_run(event);

}

}

static void event_queue_cleanup(struct udev *udev, enum event_state match_type)

{

struct udev_list_node *loop, *tmp;

udev_list_node_foreach_safe(loop, tmp, &event_list) {

struct event *event = node_to_event(loop);

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

continue;

event_queue_delete(event, false);

}

}

static void worker_returned(int fd_worker)

{

for (;;) {

struct worker_message msg;

ssize_t size;

struct udev_list_node *loop;

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

if (size != sizeof(struct worker_message))

break;

/* lookup worker who sent the signal */

udev_list_node_foreach(loop, &worker_list) {

struct worker *worker = node_to_worker(loop);

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

continue;

/* worker returned */

if (worker->event) {

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

event_queue_delete(worker->event, true);

worker->event = NULL;

}

if (worker->state != WORKER_KILLED)

worker->state = WORKER_IDLE;

worker_unref(worker);

break;

}

}

}

static struct udev_ctrl_connection *handle_ctrl_msg(struct udev_ctrl *uctrl)

{

struct udev *udev = udev_ctrl_get_udev(uctrl);

struct udev_ctrl_connection *ctrl_conn;

struct udev_ctrl_msg *ctrl_msg = NULL;

const char *str;

int i;

ctrl_conn = udev_ctrl_get_connection(uctrl);

if (ctrl_conn == NULL)

goto out;

ctrl_msg = udev_ctrl_receive_msg(ctrl_conn);

if (ctrl_msg == NULL)

goto out;

i = udev_ctrl_get_set_log_level(ctrl_msg);

if (i >= 0) {

log_debug("udevd message (SET_LOG_PRIORITY) received, log_priority=%i\n", i);

log_set_max_level(i);

udev_set_log_priority(udev, i);

worker_kill(udev);

}

if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {

log_debug("udevd message (STOP_EXEC_QUEUE) received\n");

stop_exec_queue = true;

}

if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {

log_debug("udevd message (START_EXEC_QUEUE) received\n");

stop_exec_queue = false;

}

if (udev_ctrl_get_reload(ctrl_msg) > 0) {

log_debug("udevd message (RELOAD) received\n");

reload = true;

}

str = udev_ctrl_get_set_env(ctrl_msg);

if (str != NULL) {

char *key;

key = strdup(str);

if (key != NULL) {

char *val;

val = strchr(key, '=');

if (val != NULL) {

val[0] = '\0';

val = &val[1];

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

log_debug("udevd message (ENV) received, unset '%s'\n", key);

udev_add_property(udev, key, NULL);

} else {

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

udev_add_property(udev, key, val);

}

} else {

log_error("wrong key format '%s'\n", key);

}

free(key);

}

worker_kill(udev);

}

i = udev_ctrl_get_set_children_max(ctrl_msg);

if (i >= 0) {

log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i\n", i);

children_max = i;

}

if (udev_ctrl_get_ping(ctrl_msg) > 0)

log_debug("udevd message (SYNC) received\n");

if (udev_ctrl_get_exit(ctrl_msg) > 0) {

log_debug("udevd message (EXIT) received\n");

udev_exit = true;

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

udev_ctrl_connection_ref(ctrl_conn);

}

out:

udev_ctrl_msg_unref(ctrl_msg);

return udev_ctrl_connection_unref(ctrl_conn);

}

static int handle_inotify(struct udev *udev)

{

int nbytes, pos;

char *buf;

struct inotify_event *ev;

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

return 0;

buf = malloc(nbytes);

if (buf == NULL) {

log_error("error getting buffer for inotify\n");

return -1;

}

nbytes = read(fd_inotify, buf, nbytes);

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

struct udev_device *dev;

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

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

if (dev != NULL) {

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

if (ev->mask & IN_CLOSE_WRITE) {

char filename[UTIL_PATH_SIZE];

int fd;

log_debug("device %s closed, synthesising 'change'\n", udev_device_get_devnode(dev));

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

fd = open(filename, O_WRONLY);

if (fd >= 0) {

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

log_debug("error writing uevent: %m\n");

close(fd);

}

}

if (ev->mask & IN_IGNORED)

udev_watch_end(udev, dev);

udev_device_unref(dev);

}

}

free(buf);

return 0;

}

static void handle_signal(struct udev *udev, int signo)

{

switch (signo) {

case SIGINT:

case SIGTERM:

udev_exit = true;

break;

case SIGCHLD:

for (;;) {

pid_t pid;

int status;

struct udev_list_node *loop, *tmp;

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

if (pid <= 0)

break;

udev_list_node_foreach_safe(loop, tmp, &worker_list) {

struct worker *worker = node_to_worker(loop);

if (worker->pid != pid)

continue;

log_debug("worker [%u] exit\n", pid);

if (WIFEXITED(status)) {

if (WEXITSTATUS(status) != 0)

log_error("worker [%u] exit with return code %i\n", pid, WEXITSTATUS(status));

} else if (WIFSIGNALED(status)) {

log_error("worker [%u] terminated by signal %i (%s)\n",

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

} else if (WIFSTOPPED(status)) {

log_error("worker [%u] stopped\n", pid);

} else if (WIFCONTINUED(status)) {

log_error("worker [%u] continued\n", pid);

} else {

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

}

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

if (worker->event) {

log_error("worker [%u] failed while handling '%s'\n",

pid, worker->event->devpath);

worker->event->exitcode = -32;

event_queue_delete(worker->event, true);

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

worker_unref(worker);

}

}

worker_unref(worker);

break;

}

}

break;

case SIGHUP:

reload = true;

break;

}

}

static int systemd_fds(struct udev *udev, int *rctrl, int *rnetlink)

{

int ctrl = -1, netlink = -1;

int fd, n;

n = sd_listen_fds(true);

if (n <= 0)

return -1;

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

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

if (ctrl >= 0)

return -1;

ctrl = fd;

continue;

}

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

if (netlink >= 0)

return -1;

netlink = fd;

continue;

}

return -1;

}

if (ctrl < 0 || netlink < 0)

return -1;

log_debug("ctrl=%i netlink=%i\n", ctrl, netlink);

*rctrl = ctrl;

*rnetlink = netlink;

return 0;

}

static void kernel_cmdline_options(struct udev *udev)

{

char *line, *w, *state;

size_t l;

if (read_one_line_file("/proc/cmdline", &line) < 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);

}

free(line);

}

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\n", 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\n");

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\n");

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\n");

}

}

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\n");

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\n");

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\n");

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\n");

rc = 1;

goto exit;

}

udev_monitor_set_receive_buffer_size(monitor, 128*1024*1024);

/* create queue file before signalling 'ready', to make sure we block 'settle' */

udev_queue_export = udev_queue_export_new(udev);

if (udev_queue_export == NULL) {

log_error("error creating queue file\n");

goto exit;

}

if (daemonize) {

pid_t pid;

pid = fork();

switch (pid) {

case 0:

break;

case -1:

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

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\n");

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\n");

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\n");

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\n");

goto exit;

}

memset(&ep_ctrl, 0, sizeof(struct epoll_event));

ep_ctrl.events = EPOLLIN;

ep_ctrl.data.fd = fd_ctrl;

memset(&ep_inotify, 0, sizeof(struct epoll_event));

ep_inotify.events = EPOLLIN;

ep_inotify.data.fd = fd_inotify;

memset(&ep_signal, 0, sizeof(struct epoll_event));

ep_signal.events = EPOLLIN;

ep_signal.data.fd = fd_signal;

memset(&ep_netlink, 0, sizeof(struct epoll_event));

ep_netlink.events = EPOLLIN;

ep_netlink.data.fd = fd_netlink;

memset(&ep_worker, 0, 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\n");

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\n");

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\n", children_max);

rc = udev_rules_apply_static_dev_perms(rules);

if (rc < 0)

log_error("failed to apply permissions on static device nodes - %s\n", 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) && udev_list_node_is_empty(&worker_list))

break;

/* timeout at exit for workers to finish */

timeout = 30 * 1000;

} else if (udev_list_node_is_empty(&event_list) && !children) {

/* 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 * 1000;

}

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\n");

break;

}

/* kill idle workers */

if (udev_list_node_is_empty(&event_list)) {

log_debug("cleanup idle workers\n");

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 * 1000 * 1000) {

log_error("worker [%u] %s timeout; kill it\n", 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\n",

udev_device_get_seqnum(worker->event->dev), worker->event->devpath);

worker->event->exitcode = -64;

event_queue_delete(worker->event, true);

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)