src/udev/udevd.c

	udevd.c revision a8389097c0cd91720424b25ee5c6825b4f69cb6a
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering/*
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * Copyright (C) 2009 Canonical Ltd.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * This program is free software: you can redistribute it and/or modify
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * it under the terms of the GNU General Public License as published by
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * the Free Software Foundation, either version 2 of the License, or
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * (at your option) any later version.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * This program is distributed in the hope that it will be useful,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * but WITHOUT ANY WARRANTY; without even the implied warranty of
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * GNU General Public License for more details.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering *
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * You should have received a copy of the GNU General Public License
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering * along with this program.  If not, see <http://www.gnu.org/licenses/>.
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <stddef.h>
b5efdb8af40ea759a1ea584c1bc44ecc81dd00ceLennart Poettering#include <signal.h>
96aad8d15a324d0e956a4e5653a11a67b209b41aLennart Poettering#include <unistd.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <errno.h>
4ad7f2761da661853dcc29d542efb4727abb1101Nick Owens#include <stdio.h>
39d8db043b599a7382f94bfc904d5e108af438bdLennart Poettering#include <stdlib.h>
51323288fc628a5cac50914df915545d685b793eLennart Poettering#include <stdbool.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <string.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <fcntl.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <getopt.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <sys/file.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <sys/time.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <sys/prctl.h>
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering#include <sys/socket.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <sys/signalfd.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <sys/epoll.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <sys/mount.h>
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include <sys/wait.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include <sys/stat.h>
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering#include <sys/ioctl.h>
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering#include <sys/inotify.h>
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include "sd-daemon.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "rtnl-util.h"
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering#include "cgroup-util.h"
309e9d86f0e7f9c5f0a2a09227bdfdb3174d4436Lennart Poettering#include "dev-setup.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "fileio.h"
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering#include "selinux-util.h"
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include "udev.h"
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering#include "udev-util.h"
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering#include "formats-util.h"
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering#include "hashmap.h"
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
818f766b12e025683cf4fed12b3da2a025bb0b31Lennart Poetteringstatic struct udev_rules *rules;
818f766b12e025683cf4fed12b3da2a025bb0b31Lennart Poetteringstatic struct udev_ctrl *udev_ctrl;
818f766b12e025683cf4fed12b3da2a025bb0b31Lennart Poetteringstatic struct udev_ctrl_connection *udev_ctrl_conn;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringstatic struct udev_monitor *monitor;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poetteringstatic int worker_watch[2] = { -1, -1 };
ad867662936a4c7ab2c7116d804c272338801231Lennart Poetteringstatic int fd_signal = -1;
818f766b12e025683cf4fed12b3da2a025bb0b31Lennart Poetteringstatic int fd_ep = -1;
818f766b12e025683cf4fed12b3da2a025bb0b31Lennart Poetteringstatic int fd_inotify = -1;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic bool stop_exec_queue;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poetteringstatic bool reload;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic bool arg_debug = false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int arg_daemonize = false;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poetteringstatic int arg_resolve_names = 1;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poetteringstatic unsigned arg_children_max;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic int arg_exec_delay;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poetteringstatic usec_t arg_event_timeout_warn_usec = 180 * USEC_PER_SEC / 3;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic sigset_t sigmask_orig;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poetteringstatic UDEV_LIST(event_list);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart PoetteringHashmap *workers;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poetteringstatic char *udev_cgroup;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic struct udev_list properties_list;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstatic bool udev_exit;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
63c372cb9df3bee01e3bf8cd7f96f336bddda846Lennart Poetteringenum event_state {
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        EVENT_UNDEF,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        EVENT_QUEUED,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        EVENT_RUNNING,
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering};
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringstruct event {
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering        struct udev_list_node node;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering        struct udev *udev;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering        struct udev_device *dev;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        struct udev_device *dev_kernel;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        struct worker *worker;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        enum event_state state;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        unsigned long long int delaying_seqnum;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        unsigned long long int seqnum;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        const char *devpath;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        size_t devpath_len;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        const char *devpath_old;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        dev_t devnum;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        int ifindex;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        bool is_block;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        usec_t start_usec;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        bool warned;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering};
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poetteringstatic inline struct event *node_to_event(struct udev_list_node *node) {
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        return container_of(node, struct event, node);
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering}
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poetteringstatic void event_queue_cleanup(struct udev *udev, enum event_state type);
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poetteringenum worker_state {
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        WORKER_UNDEF,
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        WORKER_RUNNING,
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        WORKER_IDLE,
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering        WORKER_KILLED,
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering};
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poetteringstruct worker {
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        struct udev_list_node node;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        struct udev *udev;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        int refcount;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering        pid_t pid;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering        struct udev_monitor *monitor;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering        enum worker_state state;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        struct event *event;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering};
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering/* passed from worker to main process */
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poetteringstruct worker_message {
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering};
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poetteringstatic void event_free(struct event *event) {
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        if (!event)
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering                return;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_list_node_remove(&event->node);
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        udev_device_unref(event->dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_device_unref(event->dev_kernel);
51323288fc628a5cac50914df915545d685b793eLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (event->worker)
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                event->worker->event = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering        free(event);
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering}
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poetteringstatic void worker_free(struct worker *worker) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (!worker)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering        hashmap_remove(workers, UINT_TO_PTR(worker->pid));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_monitor_unref(worker->monitor);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_unref(worker->udev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        event_free(worker->event);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        free(worker);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poetteringstatic void workers_free(void) {
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        struct worker *worker;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        Iterator i;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        HASHMAP_FOREACH(worker, workers, i)
51323288fc628a5cac50914df915545d685b793eLennart Poettering                worker_free(worker);
51323288fc628a5cac50914df915545d685b793eLennart Poettering
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        hashmap_free(workers);
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering        workers = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poetteringstatic int worker_new(struct worker **ret, struct udev *udev, struct udev_monitor *worker_monitor, pid_t pid) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        _cleanup_free_ struct worker *worker = NULL;
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering        int r;
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        assert(ret);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        assert(udev);
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering        assert(worker_monitor);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        assert(pid > 1);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering        worker = new0(struct worker, 1);
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering        if (!worker)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return -ENOMEM;
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        worker->refcount = 1;
309e9d86f0e7f9c5f0a2a09227bdfdb3174d4436Lennart Poettering        worker->udev = udev_ref(udev);
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering        /* close monitor, but keep address around */
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering        udev_monitor_disconnect(worker_monitor);
8ba9fd9cee0eef572f7b3ed7a8c3ed31160e93d3Lennart Poettering        worker->monitor = udev_monitor_ref(worker_monitor);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        worker->pid = pid;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering        r = hashmap_ensure_allocated(&workers, NULL);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                return r;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        r = hashmap_put(workers, UINT_TO_PTR(pid), worker);
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        if (r < 0)
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                return r;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        *ret = worker;
309e9d86f0e7f9c5f0a2a09227bdfdb3174d4436Lennart Poettering        worker = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
309e9d86f0e7f9c5f0a2a09227bdfdb3174d4436Lennart Poetteringstatic void worker_attach_event(struct worker *worker, struct event *event) {
309e9d86f0e7f9c5f0a2a09227bdfdb3174d4436Lennart Poettering        assert(worker);
309e9d86f0e7f9c5f0a2a09227bdfdb3174d4436Lennart Poettering        assert(event);
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        assert(!event->worker);
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering        assert(!worker->event);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        worker->state = WORKER_RUNNING;
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt        worker->event = event;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        event->state = EVENT_RUNNING;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->start_usec = now(CLOCK_MONOTONIC);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        event->warned = false;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        event->worker = worker;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering}
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic void worker_spawn(struct event *event) {
51323288fc628a5cac50914df915545d685b793eLennart Poettering        struct udev *udev = event->udev;
51323288fc628a5cac50914df915545d685b793eLennart Poettering        _cleanup_udev_monitor_unref_ struct udev_monitor *worker_monitor = NULL;
51323288fc628a5cac50914df915545d685b793eLennart Poettering        pid_t pid;
51323288fc628a5cac50914df915545d685b793eLennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering        /* listen for new events */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        worker_monitor = udev_monitor_new_from_netlink(udev, NULL);
51323288fc628a5cac50914df915545d685b793eLennart Poettering        if (worker_monitor == NULL)
51323288fc628a5cac50914df915545d685b793eLennart Poettering                return;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        /* allow the main daemon netlink address to send devices to the worker */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_monitor_allow_unicast_sender(worker_monitor, monitor);
51323288fc628a5cac50914df915545d685b793eLennart Poettering        udev_monitor_enable_receiving(worker_monitor);
51323288fc628a5cac50914df915545d685b793eLennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering        pid = fork();
51323288fc628a5cac50914df915545d685b793eLennart Poettering        switch (pid) {
190700621f95160d364f8ec1d3e360246c41ce75Lennart Poettering        case 0: {
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering                struct udev_device *dev = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                int fd_monitor;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                _cleanup_rtnl_unref_ sd_rtnl *rtnl = NULL;
51323288fc628a5cac50914df915545d685b793eLennart Poettering                struct epoll_event ep_signal, ep_monitor;
51323288fc628a5cac50914df915545d685b793eLennart Poettering                sigset_t mask;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                int r = 0;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* take initial device from queue */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                dev = event->dev;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                event->dev = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                workers_free();
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                event_queue_cleanup(udev, EVENT_UNDEF);
51323288fc628a5cac50914df915545d685b793eLennart Poettering                udev_monitor_unref(monitor);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                udev_ctrl_unref(udev_ctrl);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                close(fd_signal);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                close(fd_ep);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                close(worker_watch[READ_END]);
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                sigfillset(&mask);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
7b9f7afcc04e80b77a2567b0750aa2cd03c1a1cdLennart Poettering                if (fd_signal < 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        r = log_error_errno(errno, "error creating signalfd %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        goto out;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                fd_ep = epoll_create1(EPOLL_CLOEXEC);
51323288fc628a5cac50914df915545d685b793eLennart Poettering                if (fd_ep < 0) {
51323288fc628a5cac50914df915545d685b793eLennart Poettering                        r = log_error_errno(errno, "error creating epoll fd: %m");
51323288fc628a5cac50914df915545d685b793eLennart Poettering                        goto out;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                memzero(&ep_signal, sizeof(struct epoll_event));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                ep_signal.events = EPOLLIN;
51323288fc628a5cac50914df915545d685b793eLennart Poettering                ep_signal.data.fd = fd_signal;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                fd_monitor = udev_monitor_get_fd(worker_monitor);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                memzero(&ep_monitor, sizeof(struct epoll_event));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                ep_monitor.events = EPOLLIN;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                ep_monitor.data.fd = fd_monitor;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 ||
966c66e34940001a40806142ecebaae61b478444Lennart Poettering                    epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) {
82bd6dddc4a363a9c3c6f41eb46eb171a80dca27Lennart Poettering                        r = log_error_errno(errno, "fail to add fds to epoll: %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        goto out;
82bd6dddc4a363a9c3c6f41eb46eb171a80dca27Lennart Poettering                }
322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* request TERM signal if parent exits */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                prctl(PR_SET_PDEATHSIG, SIGTERM);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* reset OOM score, we only protect the main daemon */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                write_string_file("/proc/self/oom_score_adj", "0");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                for (;;) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        struct udev_event *udev_event;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        struct worker_message msg;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        int fd_lock = -1;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                        log_debug("seq %llu running", udev_device_get_seqnum(dev));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        udev_event = udev_event_new(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (udev_event == NULL) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                r = -ENOMEM;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                goto out;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering                        /* needed for SIGCHLD/SIGTERM in spawn() */
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                        udev_event->fd_signal = fd_signal;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                        if (arg_exec_delay > 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                udev_event->exec_delay = arg_exec_delay;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        /*
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                         * Take a shared lock on the device node; this establishes
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                         * a concept of device "ownership" to serialize device
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                         * access. External processes holding an exclusive lock will
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                         * cause udev to skip the event handling; in the case udev
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                         * acquired the lock, the external process can block until
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                         * udev has finished its event handling.
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                         */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (!streq_ptr(udev_device_get_action(dev), "remove") &&
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                            streq_ptr("block", udev_device_get_subsystem(dev)) &&
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                            !startswith(udev_device_get_sysname(dev), "dm-") &&
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                            !startswith(udev_device_get_sysname(dev), "md")) {
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                struct udev_device *d = dev;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                if (streq_ptr("partition", udev_device_get_devtype(d)))
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                        d = udev_device_get_parent(d);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                if (d) {
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                        fd_lock = open(udev_device_get_devnode(d), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                        if (fd_lock >= 0 && flock(fd_lock, LOCK_SH|LOCK_NB) < 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                log_debug_errno(errno, "Unable to flock(%s), skipping event handling: %m", udev_device_get_devnode(d));
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                                fd_lock = safe_close(fd_lock);
3339cb71d44c5198f9546f113674f06dc7b01a6fLennart Poettering                                                r = -EAGAIN;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                                                goto skip;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                }
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                        /* needed for renaming netifs */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        udev_event->rtnl = rtnl;
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        /* apply rules, create node, symlinks */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        udev_event_execute_rules(udev_event,
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                                                 arg_event_timeout_usec, arg_event_timeout_warn_usec,
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                                                 &properties_list,
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering                                                 rules,
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                 &sigmask_orig);
51323288fc628a5cac50914df915545d685b793eLennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering                        udev_event_execute_run(udev_event,
51323288fc628a5cac50914df915545d685b793eLennart Poettering                                               arg_event_timeout_usec, arg_event_timeout_warn_usec,
51323288fc628a5cac50914df915545d685b793eLennart Poettering                                               &sigmask_orig);
ad867662936a4c7ab2c7116d804c272338801231Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (udev_event->rtnl)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                /* in case rtnl was initialized */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                                rtnl = sd_rtnl_ref(udev_event->rtnl);
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        /* apply/restore inotify watch */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        if (udev_event->inotify_watch) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                udev_watch_begin(udev, dev);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                udev_device_update_db(dev);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
190700621f95160d364f8ec1d3e360246c41ce75Lennart Poettering                        safe_close(fd_lock);
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        /* send processed event back to libudev listeners */
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering                        udev_monitor_send_device(worker_monitor, NULL, dev);
51323288fc628a5cac50914df915545d685b793eLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringskip:
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        log_debug("seq %llu processed", udev_device_get_seqnum(dev));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        /* send udevd the result of the event execution */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        memzero(&msg, sizeof(struct worker_message));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = send(worker_watch[WRITE_END], &msg, sizeof(struct worker_message), 0);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (r < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                log_error_errno(errno, "failed to send result of seq %llu to main daemon: %m",
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                                udev_device_get_seqnum(dev));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering                        udev_device_unref(dev);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        dev = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        if (udev_event->sigterm) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                udev_event_unref(udev_event);
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering                                goto out;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        udev_event_unref(udev_event);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        /* wait for more device messages from main udevd, or term signal */
0dd25fb9f005d8ab7ac4bc10a609d00569f8c56aLennart Poettering                        while (dev == NULL) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                struct epoll_event ev[4];
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                int fdcount;
51323288fc628a5cac50914df915545d685b793eLennart Poettering                                int i;
51323288fc628a5cac50914df915545d685b793eLennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering                                fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);
51323288fc628a5cac50914df915545d685b793eLennart Poettering                                if (fdcount < 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                        if (errno == EINTR)
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering                                                continue;
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering                                        r = log_error_errno(errno, "failed to poll: %m");
faa133f3aa7a18f26563dc5d6b95898cb315c37aLennart Poettering                                        goto out;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                for (i = 0; i < fdcount; i++) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                        if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) {
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                                                dev = udev_monitor_receive_device(worker_monitor);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                break;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                        } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                struct signalfd_siginfo fdsi;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                ssize_t size;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                if (size != sizeof(struct signalfd_siginfo))
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                                                        continue;
966c66e34940001a40806142ecebaae61b478444Lennart Poettering                                                switch (fdsi.ssi_signo) {
82bd6dddc4a363a9c3c6f41eb46eb171a80dca27Lennart Poettering                                                case SIGTERM:
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                                        goto out;
82bd6dddc4a363a9c3c6f41eb46eb171a80dca27Lennart Poettering                                                }
322345fdb9865ef2477fba8e4bdde0e1183ef505Lennart Poettering                                        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poetteringout:
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_device_unref(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                safe_close(fd_signal);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                safe_close(fd_ep);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                close(fd_inotify);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                close(worker_watch[WRITE_END]);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_rules_unref(rules);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_builtin_exit(udev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_unref(udev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_close();
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        case -1:
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                event->state = EVENT_QUEUED;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_error_errno(errno, "fork of child failed: %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                break;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        default:
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct worker *worker;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                int r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = worker_new(&worker, udev, worker_monitor, pid);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                worker_attach_event(worker, event);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("seq %llu forked new worker ["PID_FMT"]", udev_device_get_seqnum(event->dev), pid);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                break;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic void event_run(struct event *event) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct worker *worker;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        Iterator i;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        HASHMAP_FOREACH(worker, workers, i) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                ssize_t count;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (worker->state != WORKER_IDLE)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        continue;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                count = udev_monitor_send_device(monitor, worker->monitor, event->dev);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (count < 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_error_errno(errno, "worker ["PID_FMT"] did not accept message %zi (%m), kill it",
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                                        worker->pid, count);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        kill(worker->pid, SIGKILL);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        worker->state = WORKER_KILLED;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        continue;
ec2c5e4398f9d65e5dfe61530f2556224733d1e6Lennart Poettering                }
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                worker_attach_event(worker, event);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                return;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        }
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (hashmap_size(workers) >= arg_children_max) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (arg_children_max > 1)
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                        log_debug("maximum number (%i) of children reached", hashmap_size(workers));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        /* start new worker and pass initial device */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        worker_spawn(event);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poetteringstatic int event_queue_insert(struct udev_device *dev) {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        struct event *event;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event = new0(struct event, 1);
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        if (event == NULL)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                return -1;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->udev = udev_device_get_udev(dev);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->dev = dev;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        event->dev_kernel = udev_device_shallow_clone(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_device_copy_properties(event->dev_kernel, dev);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->seqnum = udev_device_get_seqnum(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        event->devpath = udev_device_get_devpath(dev);
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering        event->devpath_len = strlen(event->devpath);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->devpath_old = udev_device_get_devpath_old(dev);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->devnum = udev_device_get_devnum(dev);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->is_block = streq("block", udev_device_get_subsystem(dev));
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->ifindex = udev_device_get_ifindex(dev);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering             udev_device_get_action(dev), udev_device_get_subsystem(dev));
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        event->state = EVENT_QUEUED;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        udev_list_node_append(&event->node, &event_list);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        return 0;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering}
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poetteringstatic void worker_kill(void) {
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering        struct worker *worker;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        Iterator i;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        HASHMAP_FOREACH(worker, workers, i) {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (worker->state == WORKER_KILLED)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        continue;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                worker->state = WORKER_KILLED;
51323288fc628a5cac50914df915545d685b793eLennart Poettering                kill(worker->pid, SIGTERM);
51323288fc628a5cac50914df915545d685b793eLennart Poettering        }
51323288fc628a5cac50914df915545d685b793eLennart Poettering}
51323288fc628a5cac50914df915545d685b793eLennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering/* lookup event for identical, parent, child device */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poetteringstatic bool is_devpath_busy(struct event *event) {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        struct udev_list_node *loop;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        size_t common;
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        /* check if queue contains events we depend on */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        udev_list_node_foreach(loop, &event_list) {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                struct event *loop_event = node_to_event(loop);
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                /* we already found a later event, earlier can not block us, no need to check again */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (loop_event->seqnum < event->delaying_seqnum)
190700621f95160d364f8ec1d3e360246c41ce75Lennart Poettering                        continue;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                /* event we checked earlier still exists, no need to check again */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (loop_event->seqnum == event->delaying_seqnum)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        return true;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering                /* found ourself, no later event can block us */
51323288fc628a5cac50914df915545d685b793eLennart Poettering                if (loop_event->seqnum >= event->seqnum)
51323288fc628a5cac50914df915545d685b793eLennart Poettering                        break;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                /* check major/minor */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        return true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* check network device ifindex */
51323288fc628a5cac50914df915545d685b793eLennart Poettering                if (event->ifindex != 0 && event->ifindex == loop_event->ifindex)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        return true;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                /* check our old name */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (event->devpath_old != NULL && streq(loop_event->devpath, event->devpath_old)) {
7b9f7afcc04e80b77a2567b0750aa2cd03c1a1cdLennart Poettering                        event->delaying_seqnum = loop_event->seqnum;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
7b9f7afcc04e80b77a2567b0750aa2cd03c1a1cdLennart Poettering
7b9f7afcc04e80b77a2567b0750aa2cd03c1a1cdLennart Poettering                /* compare devpath */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                common = MIN(loop_event->devpath_len, event->devpath_len);
51323288fc628a5cac50914df915545d685b793eLennart Poettering
51323288fc628a5cac50914df915545d685b793eLennart Poettering                /* one devpath is contained in the other? */
51323288fc628a5cac50914df915545d685b793eLennart Poettering                if (memcmp(loop_event->devpath, event->devpath, common) != 0)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        continue;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                /* identical device event found */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (loop_event->devpath_len == event->devpath_len) {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        /* devices names might have changed/swapped in the meantime */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        if (major(event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block))
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                                continue;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        if (event->ifindex != 0 && event->ifindex != loop_event->ifindex)
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                                continue;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        event->delaying_seqnum = loop_event->seqnum;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        return true;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                }
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                /* parent device event found */
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                if (event->devpath[common] == '/') {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        event->delaying_seqnum = loop_event->seqnum;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                        return true;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                }
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
966c66e34940001a40806142ecebaae61b478444Lennart Poettering                /* child device event found */
82bd6dddc4a363a9c3c6f41eb46eb171a80dca27Lennart Poettering                if (loop_event->devpath[common] == '/') {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        event->delaying_seqnum = loop_event->seqnum;
82bd6dddc4a363a9c3c6f41eb46eb171a80dca27Lennart Poettering                        return true;
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* no matching device */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return false;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic void event_queue_start(struct udev *udev) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct udev_list_node *loop;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_list_node_foreach(loop, &event_list) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct event *event = node_to_event(loop);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (event->state != EVENT_QUEUED)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* do not start event if parent or child event is still running */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (is_devpath_busy(event))
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                event_run(event);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic void event_queue_cleanup(struct udev *udev, enum event_state match_type) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct udev_list_node *loop, *tmp;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_list_node_foreach_safe(loop, tmp, &event_list) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct event *event = node_to_event(loop);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (match_type != EVENT_UNDEF && match_type != event->state)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                event_free(event);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        for (;;) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct worker_message msg;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct iovec iovec = {
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                        .iov_base = &msg,
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        .iov_len = sizeof(msg),
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                };
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                union {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        struct cmsghdr cmsghdr;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } control = {};
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct msghdr msghdr = {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        .msg_iov = &iovec,
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        .msg_iovlen = 1,
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        .msg_control = &control,
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        .msg_controllen = sizeof(control),
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                };
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct cmsghdr *cmsg;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                ssize_t size;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct ucred *ucred = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct worker *worker;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                size = recvmsg(fd, &msghdr, MSG_DONTWAIT);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (size < 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (errno == EAGAIN || errno == EINTR)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return log_error_errno(errno, "failed to receive message: %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } else if (size != sizeof(struct worker_message)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning_errno(EIO, "ignoring worker message with invalid size %zi bytes", size);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (cmsg->cmsg_level == SOL_SOCKET &&
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                            cmsg->cmsg_type == SCM_CREDENTIALS &&
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                            cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                ucred = (struct ucred*) CMSG_DATA(cmsg);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (!ucred || ucred->pid <= 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning_errno(EIO, "ignoring worker message without valid PID");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* lookup worker who sent the signal */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                worker = hashmap_get(workers, UINT_TO_PTR(ucred->pid));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (!worker) {
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                        log_debug("worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (worker->state != WORKER_KILLED)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        worker->state = WORKER_IDLE;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* worker returned */
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                event_free(worker->event);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_uevent(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct udev_monitor *m = userdata;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct udev_device *dev;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        int r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        assert(m);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        dev = udev_monitor_receive_device(m);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (dev) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_device_ensure_usec_initialized(dev, NULL);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = event_queue_insert(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        udev_device_unref(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering/* receive the udevd message from userspace */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct udev_ctrl *uctrl = userdata;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        _cleanup_udev_ctrl_connection_unref_ struct udev_ctrl_connection *ctrl_conn = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        _cleanup_udev_ctrl_msg_unref_ struct udev_ctrl_msg *ctrl_msg = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        const char *str;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        int i;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        assert(uctrl);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        ctrl_conn = udev_ctrl_get_connection(uctrl);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (!ctrl_conn)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        ctrl_msg = udev_ctrl_receive_msg(ctrl_conn);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (!ctrl_msg)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        i = udev_ctrl_get_set_log_level(ctrl_msg);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (i >= 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_set_max_level(i);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                worker_kill();
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("udevd message (STOP_EXEC_QUEUE) received");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                stop_exec_queue = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("udevd message (START_EXEC_QUEUE) received");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                stop_exec_queue = false;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (udev_ctrl_get_reload(ctrl_msg) > 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("udevd message (RELOAD) received");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                reload = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        str = udev_ctrl_get_set_env(ctrl_msg);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (str != NULL) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                char *key;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                key = strdup(str);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (key != NULL) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        char *val;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        val = strchr(key, '=');
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (val != NULL) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                val[0] = '\0';
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                val = &val[1];
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                if (val[0] == '\0') {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                        log_debug("udevd message (ENV) received, unset '%s'", key);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                        udev_list_entry_add(&properties_list, key, NULL);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                } else {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                        log_debug("udevd message (ENV) received, set '%s=%s'", key, val);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                        udev_list_entry_add(&properties_list, key, val);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        } else {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                log_error("wrong key format '%s'", key);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        free(key);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                worker_kill();
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        i = udev_ctrl_get_set_children_max(ctrl_msg);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (i >= 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                arg_children_max = i;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (udev_ctrl_get_ping(ctrl_msg) > 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("udevd message (SYNC) received");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (udev_ctrl_get_exit(ctrl_msg) > 0) {
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                log_debug("udevd message (EXIT) received");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_exit = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* keep reference to block the client until we exit */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_ctrl_conn = udev_ctrl_connection_ref(ctrl_conn);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int synthesize_change(struct udev_device *dev) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        char filename[UTIL_PATH_SIZE];
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        int r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (streq_ptr("block", udev_device_get_subsystem(dev)) &&
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering            streq_ptr("disk", udev_device_get_devtype(dev)) &&
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering            !startswith(udev_device_get_sysname(dev), "dm-")) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                bool part_table_read = false;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                bool has_partitions = false;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                int fd;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct udev *udev = udev_device_get_udev(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct udev_list_entry *item;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /*
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * Try to re-read the partition table. This only succeeds if
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                 * none of the devices is busy. The kernel returns 0 if no
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * partition table is found, and we will not get an event for
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * the disk.
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (fd >= 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        r = flock(fd, LOCK_EX|LOCK_NB);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (r >= 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                r = ioctl(fd, BLKRRPART, 0);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        close(fd);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (r >= 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                part_table_read = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /* search for partitions */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                e = udev_enumerate_new(udev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (!e)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return -ENOMEM;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                r = udev_enumerate_add_match_parent(e, dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = udev_enumerate_add_match_subsystem(e, "block");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = udev_enumerate_scan_devices(e);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        _cleanup_udev_device_unref_ struct udev_device *d = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                        if (!d)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (!streq_ptr("partition", udev_device_get_devtype(d)))
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        has_partitions = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        break;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /*
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * We have partitions and re-read the table, the kernel already sent
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * out a "change" event for the disk, and "remove/add" for all
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * partitions.
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (part_table_read && has_partitions)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                /*
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * We have partitions but re-reading the partition table did not
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 * work, synthesize "change" for the disk and all partitions.
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                 */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                write_string_file(filename, "change");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        _cleanup_udev_device_unref_ struct udev_device *d = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (!d)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (!streq_ptr("partition", udev_device_get_devtype(d)))
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_debug("device %s closed, synthesising partition '%s' 'change'",
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                  udev_device_get_devnode(dev), udev_device_get_devnode(d));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        strscpyl(filename, sizeof(filename), udev_device_get_syspath(d), "/uevent", NULL);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        write_string_file(filename, "change");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        write_string_file(filename, "change");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct udev *udev = userdata;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        union inotify_event_buffer buffer;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        struct inotify_event *e;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        ssize_t l;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        assert(udev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        l = read(fd, &buffer, sizeof(buffer));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (l < 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (errno == EAGAIN || errno == EINTR)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return log_error_errno(errno, "Failed to read inotify fd: %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        FOREACH_INOTIFY_EVENT(e, buffer, l) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                dev = udev_watch_lookup(udev, e->wd);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (!dev)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_debug("inotify event: %x for %s", e->mask, udev_device_get_devnode(dev));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (e->mask & IN_CLOSE_WRITE) {
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                        synthesize_change(dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        /* settle might be waiting on us to determine the queue
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                         * state. If we just handled an inotify event, we might have
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                         * generated a "change" event, but we won't have queued up
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                         * the resultant uevent yet. Do that.
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                         */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        on_uevent(NULL, -1, 0, monitor);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } else if (e->mask & IN_IGNORED)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        udev_watch_end(udev, dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_request_exit(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        udev_exit = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_request_reload(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        reload = true;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        for (;;) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                pid_t pid;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                int status;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                struct worker *worker;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                pid = waitpid(-1, &status, WNOHANG);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (pid <= 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                worker = hashmap_get(workers, UINT_TO_PTR(pid));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (!worker) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("worker ["PID_FMT"] is unknown, ignoring", pid);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (WIFEXITED(status)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (WEXITSTATUS(status) == 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                log_debug("worker ["PID_FMT"] exited", pid);
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                        else
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                log_warning("worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } else if (WIFSIGNALED(status)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } else if (WIFSTOPPED(status)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_info("worker ["PID_FMT"] stopped", pid);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } else if (WIFCONTINUED(status)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_info("worker ["PID_FMT"] continued", pid);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                } else
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("worker ["PID_FMT"] exit with status 0x%04x", pid, status);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (worker->event) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                log_error("worker ["PID_FMT"] failed while handling '%s'", pid, worker->event->devpath);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                /* delete state from disk */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                udev_device_delete_db(worker->event->dev);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                udev_device_tag_index(worker->event->dev, NULL, false);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                /* forward kernel event without amending it */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                udev_monitor_send_device(monitor, NULL, worker->event->dev_kernel);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                worker_free(worker);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic void event_queue_update(void) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        int r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (!udev_list_node_is_empty(&event_list)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = touch("/run/udev/queue");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
703e4f5e39c019da8c002ba10bd450ce378c0e91Lennart Poettering                        log_warning_errno(r, "could not touch /run/udev/queue: %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        } else {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = unlink("/run/udev/queue");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0 && errno != ENOENT)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("could not unlink /run/udev/queue: %m");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int systemd_fds(struct udev *udev, int *rctrl, int *rnetlink) {
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        int ctrl = -1, netlink = -1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        int fd, n;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        n = sd_listen_fds(true);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (n <= 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return -1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (ctrl >= 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                return -1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        ctrl = fd;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1)) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        if (netlink >= 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                                return -1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        netlink = fd;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        continue;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return -1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering        if (ctrl < 0 || netlink < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return -1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        log_debug("ctrl=%i netlink=%i", ctrl, netlink);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        *rctrl = ctrl;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        *rnetlink = netlink;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering/*
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering * read the kernel command line, in case we need to get into debug mode
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering *   udev.log-priority=<level>                 syslog priority
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering *   udev.children-max=<number of workers>     events are fully serialized if set to 1
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering *   udev.exec-delay=<number of seconds>       delay execution of every executed program
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering *   udev.event-timeout=<number of seconds>    seconds to wait before terminating an event
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering */
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic int parse_proc_cmdline_item(const char *key, const char *value) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        int r;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        assert(key);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (!value)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (startswith(key, "rd."))
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                key += strlen("rd.");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (startswith(key, "udev."))
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                key += strlen("udev.");
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        else
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        if (streq(key, "log-priority")) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                int prio;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                prio = util_log_priority(value);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                log_set_max_level(prio);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        } else if (streq(key, "children-max")) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = safe_atou(value, &arg_children_max);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("invalid udev.children-max ignored: %s", value);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        } else if (streq(key, "exec-delay")) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = safe_atoi(value, &arg_exec_delay);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("invalid udev.exec-delay ignored: %s", value);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        } else if (streq(key, "event-timeout")) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                r = safe_atou64(value, &arg_event_timeout_usec);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                if (r < 0)
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        log_warning("invalid udev.event-timeout ignored: %s", value);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                else {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                        arg_event_timeout_usec *= USEC_PER_SEC;
801ad6a6a9cd8fbd58b9f9c27f20dbb3c87d47ddLennart Poettering                        arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering                }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        return 0;
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poetteringstatic void help(void) {
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering        printf("%s [OPTIONS...]\n\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "Manages devices.\n\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "  -h --help                   Print this message\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "     --version                Print version of the program\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "     --daemon                 Detach and run in the background\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "     --debug                  Enable debug output\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "     --children-max=INT       Set maximum number of workers\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "     --exec-delay=SECONDS     Seconds to wait before executing RUN=\n"
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering               "     --event-timeout=SECONDS  Seconds to wait before terminating an event\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "     --resolve-names=early|late|never\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               "                              When to resolve users and groups\n"
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering               , program_invocation_short_name);
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering}
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poettering
2d4c5cbc0ed3ccb09dc086a040088b454c22c644Lennart Poetteringstatic int parse_argv(int argc, char *argv[]) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        static const struct option options[] = {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "daemon",             no_argument,            NULL, 'd' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "debug",              no_argument,            NULL, 'D' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "children-max",       required_argument,      NULL, 'c' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "exec-delay",         required_argument,      NULL, 'e' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "event-timeout",      required_argument,      NULL, 't' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "resolve-names",      required_argument,      NULL, 'N' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "help",               no_argument,            NULL, 'h' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                { "version",            no_argument,            NULL, 'V' },
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                {}
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        };
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        int c;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        assert(argc >= 0);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        assert(argv);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        while ((c = getopt_long(argc, argv, "c:de:DtN:hV", options, NULL)) >= 0) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                int r;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                switch (c) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'd':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        arg_daemonize = true;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        break;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'c':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        r = safe_atou(optarg, &arg_children_max);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        if (r < 0)
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                log_warning("Invalid --children-max ignored: %s", optarg);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        break;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'e':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        r = safe_atoi(optarg, &arg_exec_delay);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        if (r < 0)
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                log_warning("Invalid --exec-delay ignored: %s", optarg);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        break;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 't':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        r = safe_atou64(optarg, &arg_event_timeout_usec);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        if (r < 0)
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                log_warning("Invalid --event-timeout ignored: %s", optarg);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        else {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                arg_event_timeout_usec *= USEC_PER_SEC;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        }
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        break;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'D':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        arg_debug = true;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        break;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'N':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        if (streq(optarg, "early")) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                arg_resolve_names = 1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        } else if (streq(optarg, "late")) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                arg_resolve_names = 0;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        } else if (streq(optarg, "never")) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                arg_resolve_names = -1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        } else {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                log_error("resolve-names must be early, late or never");
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                                return 0;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        }
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        break;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'h':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        help();
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        return 0;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case 'V':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        printf("%s\n", VERSION);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        return 0;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                case '?':
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        return -EINVAL;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                default:
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                        assert_not_reached("Unhandled option");
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                }
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        }
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        return 1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering}
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poetteringint main(int argc, char *argv[]) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        struct udev *udev;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        sigset_t mask;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        int fd_ctrl = -1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        int fd_netlink = -1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        int fd_worker = -1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        struct epoll_event ep_ctrl = { .events = EPOLLIN };
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        struct epoll_event ep_inotify = { .events = EPOLLIN };
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        struct epoll_event ep_signal = { .events = EPOLLIN };
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        struct epoll_event ep_netlink = { .events = EPOLLIN };
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        struct epoll_event ep_worker = { .events = EPOLLIN };
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        int r = 0, one = 1;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        udev = udev_new();
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        if (!udev) {
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                r = log_error_errno(errno, "could not allocate udev context: %m");
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                goto exit;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        }
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        log_set_target(LOG_TARGET_AUTO);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        log_parse_environment();
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        log_open();
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        r = parse_argv(argc, argv);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        if (r <= 0)
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                goto exit;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        r = parse_proc_cmdline(parse_proc_cmdline_item);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        if (r < 0)
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                log_warning_errno(r, "failed to parse kernel command line, ignoring: %m");
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        if (arg_debug)
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering                log_set_max_level(LOG_DEBUG);
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        if (getuid() != 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = log_error_errno(EPERM, "root privileges required");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto exit;
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        }
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        r = mac_selinux_init("/dev");
7f220d94a938a99c77400fa0ca30485e269bae7cLennart Poettering        if (r < 0) {
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                log_error_errno(r, "could not initialize labelling: %m");
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering                goto exit;
78c6a153c47f8d597c827bdcaf8c4e42ac87f738Lennart Poettering        }
45ec7efb6c2560c80dfa752bc9d3733749dc52cbLennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        /* set umask before creating any file/directory */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = chdir("/");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = log_error_errno(errno, "could not change dir to /: %m");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto exit;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        umask(022);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        udev_list_init(udev, &properties_list, true);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        r = mkdir("/run/udev", 0755);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        if (r < 0 && errno != EEXIST) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                r = log_error_errno(errno, "could not create /run/udev: %m");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                goto exit;
190700621f95160d364f8ec1d3e360246c41ce75Lennart Poettering        }
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        dev_setup(NULL);
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering
190700621f95160d364f8ec1d3e360246c41ce75Lennart Poettering        /* before opening new files, make sure std{in,out,err} fds are in a sane state */
190700621f95160d364f8ec1d3e360246c41ce75Lennart Poettering        if (arg_daemonize) {
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                int fd;
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                fd = open("/dev/null", O_RDWR);
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt                if (fd >= 0) {
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                        if (write(STDOUT_FILENO, 0, 0) < 0)
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                                dup2(fd, STDOUT_FILENO);
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                        if (write(STDERR_FILENO, 0, 0) < 0)
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                                dup2(fd, STDERR_FILENO);
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                        if (fd > STDERR_FILENO)
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                                close(fd);
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                } else {
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                        log_error("cannot open /dev/null");
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                }
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        }
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        if (systemd_fds(udev, &fd_ctrl, &fd_netlink) >= 0) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* get control and netlink socket from systemd */
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                udev_ctrl = udev_ctrl_new_from_fd(udev, fd_ctrl);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (!udev_ctrl) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = log_error_errno(EINVAL, "error taking over udev control socket");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        goto exit;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                monitor = udev_monitor_new_from_netlink_fd(udev, "kernel", fd_netlink);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (!monitor) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = log_error_errno(EINVAL, "error taking over netlink socket");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        goto exit;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                /* get our own cgroup, we regularly kill everything udev has left behind */
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt                if (cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &udev_cgroup) < 0)
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        udev_cgroup = NULL;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        } else {
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt                /* open control and netlink socket */
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt                udev_ctrl = udev_ctrl_new(udev);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (!udev_ctrl) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = log_error_errno(EINVAL, "error initializing udev control socket");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        goto exit;
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                }
4d1cf1e229c9bdbc44778c0863eaad918f5724e7Lennart Poettering                fd_ctrl = udev_ctrl_get_fd(udev_ctrl);
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt                monitor = udev_monitor_new_from_netlink(udev, "kernel");
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                if (!monitor) {
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                        r = log_error_errno(EINVAL, "error initializing netlink socket");
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt                        goto exit;
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt                }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering                fd_netlink = udev_monitor_get_fd(monitor);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt                udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024);
f647962d64e844689f3e2acfce6102fc47e76df2Michal Schmidt        }
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        if (udev_monitor_enable_receiving(monitor) < 0) {
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                r = log_error_errno(EINVAL, "error binding netlink socket");
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                goto exit;
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        }
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        if (udev_ctrl_enable_receiving(udev_ctrl) < 0) {
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                r = log_error_errno(EINVAL, "error binding udev control socket");
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering                goto exit;
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        }
da927ba997d68401563b927f92e6e40e021a8e5cMichal Schmidt
902bb5d8abb2a7d258741828d212ca549ab16950Lennart Poettering        log_info("starting version " VERSION);
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering
74b2466e14a1961bf3ac0e8a60cfaceec705bd59Lennart Poettering        udev_builtin_init(udev);

        rules = udev_rules_new(udev, arg_resolve_names);
        if (!rules) {
                r = log_error_errno(ENOMEM, "error reading rules");
                goto exit;
        }

        r = udev_rules_apply_static_dev_perms(rules);
        if (r < 0)
                log_error_errno(r, "failed to apply permissions on static device nodes: %m");

        if (arg_daemonize) {
                pid_t pid;

                pid = fork();
                switch (pid) {
                case 0:
                        break;
                case -1:
                        r = log_error_errno(errno, "fork of daemon failed: %m");
                        goto exit;
                default:
                        goto exit_daemonize;
                }

                setsid();

                write_string_file("/proc/self/oom_score_adj", "-1000");
        } else {
                sd_notify(1, "READY=1");
        }

        if (arg_children_max == 0) {
                cpu_set_t cpu_set;

                arg_children_max = 8;

                if (sched_getaffinity(0, sizeof (cpu_set), &cpu_set) == 0) {
                        arg_children_max +=  CPU_COUNT(&cpu_set) * 2;
                }
        }
        log_debug("set children_max to %u", arg_children_max);

        udev_list_node_init(&event_list);

        fd_inotify = udev_watch_init(udev);
        if (fd_inotify < 0) {
                r = log_error_errno(ENOMEM, "error initializing inotify");
                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) {
                r = log_error_errno(errno, "error creating signalfd");
                goto exit;
        }

        /* unnamed socket from workers to the main daemon */
        if (socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, worker_watch) < 0) {
                r = log_error_errno(errno, "error creating socketpair");
                goto exit;
        }
        fd_worker = worker_watch[READ_END];

        r = setsockopt(fd_worker, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one));
        if (r < 0)
                return log_error_errno(errno, "could not enable SO_PASSCRED: %m");

        ep_ctrl.data.fd = fd_ctrl;
        ep_inotify.data.fd = fd_inotify;
        ep_signal.data.fd = fd_signal;
        ep_netlink.data.fd = fd_netlink;
        ep_worker.data.fd = fd_worker;

        fd_ep = epoll_create1(EPOLL_CLOEXEC);
        if (fd_ep < 0) {
                log_error_errno(errno, "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_errno(errno, "fail to add fds to epoll: %m");
                goto exit;
        }

        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();

                        /* exit after all has cleaned up */
                        if (udev_list_node_is_empty(&event_list) && hashmap_isempty(workers))
                                break;

                        /* timeout at exit for workers to finish */
                        timeout = 30 * MSEC_PER_SEC;
                } else if (udev_list_node_is_empty(&event_list) && hashmap_isempty(workers)) {
                        /* 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 */
                event_queue_update();

                fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout);
                if (fdcount < 0)
                        continue;

                if (fdcount == 0) {
                        struct worker *worker;
                        Iterator j;

                        /* 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();
                        }

                        /* check for hanging events */
                        HASHMAP_FOREACH(worker, workers, j) {
                                struct event *event = worker->event;
                                usec_t ts;

                                if (worker->state != WORKER_RUNNING)
                                        continue;

                                assert(event);

                                ts = now(CLOCK_MONOTONIC);

                                if ((ts - event->start_usec) > arg_event_timeout_warn_usec) {
                                        if ((ts - event->start_usec) > arg_event_timeout_usec) {
                                                log_error("worker ["PID_FMT"] %s timeout; kill it", worker->pid, event->devpath);
                                                kill(worker->pid, SIGKILL);
                                                worker->state = WORKER_KILLED;

                                                log_error("seq %llu '%s' killed", udev_device_get_seqnum(event->dev), event->devpath);
                                        } else if (!event->warned) {
                                                log_warning("worker ["PID_FMT"] %s is taking a long time", worker->pid, event->devpath);
                                                event->warned = true;
                                        }
                                }
                        }

                }

                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)
                                is_netlink = true;
                        else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN)
                                is_signal = true;
                        else if (ev[i].data.fd == fd_inotify && ev[i].events & EPOLLIN)
                                is_inotify = true;
                        else if (ev[i].data.fd == fd_ctrl && ev[i].events & EPOLLIN)
                                is_ctrl = true;
                }

                /* check for changed config, every 3 seconds at most */
                if ((now(CLOCK_MONOTONIC) - last_usec) > 3 * USEC_PER_SEC) {
                        if (udev_rules_check_timestamp(rules))
                                reload = true;
                        if (udev_builtin_validate(udev))
                                reload = true;

                        last_usec = now(CLOCK_MONOTONIC);
                }

                /* reload requested, HUP signal received, rules changed, builtin changed */
                if (reload) {
                        worker_kill();
                        rules = udev_rules_unref(rules);
                        udev_builtin_exit(udev);
                        reload = false;
                }

                /* event has finished */
                if (is_worker)
                        on_worker(NULL, fd_worker, 0, NULL);

                /* uevent from kernel */
                if (is_netlink)
                        on_uevent(NULL, fd_netlink, 0, monitor);

                /* start new events */
                if (!udev_list_node_is_empty(&event_list) && !udev_exit && !stop_exec_queue) {
                        udev_builtin_init(udev);
                        if (rules == NULL)
                                rules = udev_rules_new(udev, arg_resolve_names);
                        if (rules != NULL)
                                event_queue_start(udev);
                }

                if (is_signal) {
                        struct signalfd_siginfo fdsi;
                        ssize_t size;

                        size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
                        if (size == sizeof(struct signalfd_siginfo)) {
                                switch (fdsi.ssi_signo) {
                                case SIGINT:
                                case SIGTERM:
                                        on_request_exit(NULL, &fdsi, NULL);
                                        break;
                                case SIGHUP:
                                        on_request_reload(NULL, &fdsi, NULL);
                                        break;
                                case SIGCHLD:
                                        on_sigchld(NULL, &fdsi, NULL);
                                        break;
                                }
                        }
                }

                /* we are shutting down, the events below are not handled anymore */
                if (udev_exit)
                        continue;

                /* device node watch */
                if (is_inotify)
                        on_inotify(NULL, fd_inotify, 0, udev);

                /* tell settle that we are busy or idle, this needs to be before the
                 * PING handling
                 */
                event_queue_update();

                /*
                 * This needs to be after the inotify handling, to make sure,
                 * that the ping is send back after the possibly generated
                 * "change" events by the inotify device node watch.
                 *
                 * A single time we may receive a client connection which we need to
                 * keep open to block the client. It will be closed right before we
                 * exit.
                 */
                if (is_ctrl)
                        on_ctrl_msg(NULL, fd_ctrl, 0, udev_ctrl);
        }

exit:
        udev_ctrl_cleanup(udev_ctrl);
        unlink("/run/udev/queue");
exit_daemonize:
        if (fd_ep >= 0)
                close(fd_ep);
        workers_free();
        event_queue_cleanup(udev, EVENT_UNDEF);
        udev_rules_unref(rules);
        udev_builtin_exit(udev);
        if (fd_signal >= 0)
                close(fd_signal);
        if (worker_watch[READ_END] >= 0)
                close(worker_watch[READ_END]);
        if (worker_watch[WRITE_END] >= 0)
                close(worker_watch[WRITE_END]);
        udev_monitor_unref(monitor);
        udev_ctrl_connection_unref(udev_ctrl_conn);
        udev_ctrl_unref(udev_ctrl);
        udev_list_cleanup(&properties_list);
        mac_selinux_finish();
        udev_unref(udev);
        log_close();
        return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}