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-rw-r--r--src/udev/udevd.c1764
1 files changed, 0 insertions, 1764 deletions
diff --git a/src/udev/udevd.c b/src/udev/udevd.c
deleted file mode 100644
index a893a2b3d9..0000000000
--- a/src/udev/udevd.c
+++ /dev/null
@@ -1,1764 +0,0 @@
-/*
- * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org>
- * Copyright (C) 2004 Chris Friesen <chris_friesen@sympatico.ca>
- * Copyright (C) 2009 Canonical Ltd.
- * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/epoll.h>
-#include <sys/file.h>
-#include <sys/inotify.h>
-#include <sys/ioctl.h>
-#include <sys/mount.h>
-#include <sys/prctl.h>
-#include <sys/signalfd.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/time.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include "sd-daemon.h"
-#include "sd-event.h"
-
-#include "alloc-util.h"
-#include "cgroup-util.h"
-#include "cpu-set-util.h"
-#include "dev-setup.h"
-#include "fd-util.h"
-#include "fileio.h"
-#include "formats-util.h"
-#include "fs-util.h"
-#include "hashmap.h"
-#include "io-util.h"
-#include "netlink-util.h"
-#include "parse-util.h"
-#include "proc-cmdline.h"
-#include "process-util.h"
-#include "selinux-util.h"
-#include "signal-util.h"
-#include "socket-util.h"
-#include "string-util.h"
-#include "terminal-util.h"
-#include "udev-util.h"
-#include "udev.h"
-#include "user-util.h"
-
-static bool arg_debug = false;
-static int arg_daemonize = false;
-static int arg_resolve_names = 1;
-static unsigned arg_children_max;
-static int arg_exec_delay;
-static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC;
-static usec_t arg_event_timeout_warn_usec = 180 * USEC_PER_SEC / 3;
-
-typedef struct Manager {
- struct udev *udev;
- sd_event *event;
- Hashmap *workers;
- struct udev_list_node events;
- const char *cgroup;
- pid_t pid; /* the process that originally allocated the manager object */
-
- struct udev_rules *rules;
- struct udev_list properties;
-
- struct udev_monitor *monitor;
- struct udev_ctrl *ctrl;
- struct udev_ctrl_connection *ctrl_conn_blocking;
- int fd_inotify;
- int worker_watch[2];
-
- sd_event_source *ctrl_event;
- sd_event_source *uevent_event;
- sd_event_source *inotify_event;
-
- usec_t last_usec;
-
- bool stop_exec_queue:1;
- bool exit:1;
-} Manager;
-
-enum event_state {
- EVENT_UNDEF,
- EVENT_QUEUED,
- EVENT_RUNNING,
-};
-
-struct event {
- struct udev_list_node node;
- Manager *manager;
- struct udev *udev;
- struct udev_device *dev;
- struct udev_device *dev_kernel;
- struct worker *worker;
- enum event_state state;
- unsigned long long int delaying_seqnum;
- unsigned long long int seqnum;
- const char *devpath;
- size_t devpath_len;
- const char *devpath_old;
- dev_t devnum;
- int ifindex;
- bool is_block;
- sd_event_source *timeout_warning;
- sd_event_source *timeout;
-};
-
-static inline struct event *node_to_event(struct udev_list_node *node) {
- return container_of(node, struct event, node);
-}
-
-static void event_queue_cleanup(Manager *manager, enum event_state type);
-
-enum worker_state {
- WORKER_UNDEF,
- WORKER_RUNNING,
- WORKER_IDLE,
- WORKER_KILLED,
-};
-
-struct worker {
- Manager *manager;
- struct udev_list_node node;
- int refcount;
- pid_t pid;
- struct udev_monitor *monitor;
- enum worker_state state;
- struct event *event;
-};
-
-/* passed from worker to main process */
-struct worker_message {
-};
-
-static void event_free(struct event *event) {
- int r;
-
- if (!event)
- return;
-
- udev_list_node_remove(&event->node);
- udev_device_unref(event->dev);
- udev_device_unref(event->dev_kernel);
-
- sd_event_source_unref(event->timeout_warning);
- sd_event_source_unref(event->timeout);
-
- if (event->worker)
- event->worker->event = NULL;
-
- assert(event->manager);
-
- if (udev_list_node_is_empty(&event->manager->events)) {
- /* only clean up the queue from the process that created it */
- if (event->manager->pid == getpid()) {
- r = unlink("/run/udev/queue");
- if (r < 0)
- log_warning_errno(errno, "could not unlink /run/udev/queue: %m");
- }
- }
-
- free(event);
-}
-
-static void worker_free(struct worker *worker) {
- if (!worker)
- return;
-
- assert(worker->manager);
-
- hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid));
- udev_monitor_unref(worker->monitor);
- event_free(worker->event);
-
- free(worker);
-}
-
-static void manager_workers_free(Manager *manager) {
- struct worker *worker;
- Iterator i;
-
- assert(manager);
-
- HASHMAP_FOREACH(worker, manager->workers, i)
- worker_free(worker);
-
- manager->workers = hashmap_free(manager->workers);
-}
-
-static int worker_new(struct worker **ret, Manager *manager, struct udev_monitor *worker_monitor, pid_t pid) {
- _cleanup_free_ struct worker *worker = NULL;
- int r;
-
- assert(ret);
- assert(manager);
- assert(worker_monitor);
- assert(pid > 1);
-
- worker = new0(struct worker, 1);
- if (!worker)
- return -ENOMEM;
-
- worker->refcount = 1;
- worker->manager = manager;
- /* close monitor, but keep address around */
- udev_monitor_disconnect(worker_monitor);
- worker->monitor = udev_monitor_ref(worker_monitor);
- worker->pid = pid;
-
- r = hashmap_ensure_allocated(&manager->workers, NULL);
- if (r < 0)
- return r;
-
- r = hashmap_put(manager->workers, PID_TO_PTR(pid), worker);
- if (r < 0)
- return r;
-
- *ret = worker;
- worker = NULL;
-
- return 0;
-}
-
-static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
- struct event *event = userdata;
-
- assert(event);
- assert(event->worker);
-
- kill_and_sigcont(event->worker->pid, SIGKILL);
- event->worker->state = WORKER_KILLED;
-
- log_error("seq %llu '%s' killed", udev_device_get_seqnum(event->dev), event->devpath);
-
- return 1;
-}
-
-static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) {
- struct event *event = userdata;
-
- assert(event);
-
- log_warning("seq %llu '%s' is taking a long time", udev_device_get_seqnum(event->dev), event->devpath);
-
- return 1;
-}
-
-static void worker_attach_event(struct worker *worker, struct event *event) {
- sd_event *e;
- uint64_t usec;
-
- assert(worker);
- assert(worker->manager);
- assert(event);
- assert(!event->worker);
- assert(!worker->event);
-
- worker->state = WORKER_RUNNING;
- worker->event = event;
- event->state = EVENT_RUNNING;
- event->worker = worker;
-
- e = worker->manager->event;
-
- assert_se(sd_event_now(e, clock_boottime_or_monotonic(), &usec) >= 0);
-
- (void) sd_event_add_time(e, &event->timeout_warning, clock_boottime_or_monotonic(),
- usec + arg_event_timeout_warn_usec, USEC_PER_SEC, on_event_timeout_warning, event);
-
- (void) sd_event_add_time(e, &event->timeout, clock_boottime_or_monotonic(),
- usec + arg_event_timeout_usec, USEC_PER_SEC, on_event_timeout, event);
-}
-
-static void manager_free(Manager *manager) {
- if (!manager)
- return;
-
- udev_builtin_exit(manager->udev);
-
- sd_event_source_unref(manager->ctrl_event);
- sd_event_source_unref(manager->uevent_event);
- sd_event_source_unref(manager->inotify_event);
-
- udev_unref(manager->udev);
- sd_event_unref(manager->event);
- manager_workers_free(manager);
- event_queue_cleanup(manager, EVENT_UNDEF);
-
- udev_monitor_unref(manager->monitor);
- udev_ctrl_unref(manager->ctrl);
- udev_ctrl_connection_unref(manager->ctrl_conn_blocking);
-
- udev_list_cleanup(&manager->properties);
- udev_rules_unref(manager->rules);
-
- safe_close(manager->fd_inotify);
- safe_close_pair(manager->worker_watch);
-
- free(manager);
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
-
-static int worker_send_message(int fd) {
- struct worker_message message = {};
-
- return loop_write(fd, &message, sizeof(message), false);
-}
-
-static void worker_spawn(Manager *manager, struct event *event) {
- struct udev *udev = event->udev;
- _cleanup_udev_monitor_unref_ struct udev_monitor *worker_monitor = NULL;
- pid_t pid;
- int r = 0;
-
- /* listen for new events */
- worker_monitor = udev_monitor_new_from_netlink(udev, NULL);
- if (worker_monitor == NULL)
- return;
- /* allow the main daemon netlink address to send devices to the worker */
- udev_monitor_allow_unicast_sender(worker_monitor, manager->monitor);
- r = udev_monitor_enable_receiving(worker_monitor);
- if (r < 0)
- log_error_errno(r, "worker: could not enable receiving of device: %m");
-
- pid = fork();
- switch (pid) {
- case 0: {
- struct udev_device *dev = NULL;
- _cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
- int fd_monitor;
- _cleanup_close_ int fd_signal = -1, fd_ep = -1;
- struct epoll_event ep_signal = { .events = EPOLLIN };
- struct epoll_event ep_monitor = { .events = EPOLLIN };
- sigset_t mask;
-
- /* take initial device from queue */
- dev = event->dev;
- event->dev = NULL;
-
- unsetenv("NOTIFY_SOCKET");
-
- manager_workers_free(manager);
- event_queue_cleanup(manager, EVENT_UNDEF);
-
- manager->monitor = udev_monitor_unref(manager->monitor);
- manager->ctrl_conn_blocking = udev_ctrl_connection_unref(manager->ctrl_conn_blocking);
- manager->ctrl = udev_ctrl_unref(manager->ctrl);
- manager->worker_watch[READ_END] = safe_close(manager->worker_watch[READ_END]);
-
- manager->ctrl_event = sd_event_source_unref(manager->ctrl_event);
- manager->uevent_event = sd_event_source_unref(manager->uevent_event);
- manager->inotify_event = sd_event_source_unref(manager->inotify_event);
-
- manager->event = sd_event_unref(manager->event);
-
- sigfillset(&mask);
- fd_signal = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC);
- if (fd_signal < 0) {
- r = log_error_errno(errno, "error creating signalfd %m");
- goto out;
- }
- ep_signal.data.fd = fd_signal;
-
- fd_monitor = udev_monitor_get_fd(worker_monitor);
- ep_monitor.data.fd = fd_monitor;
-
- fd_ep = epoll_create1(EPOLL_CLOEXEC);
- if (fd_ep < 0) {
- r = log_error_errno(errno, "error creating epoll fd: %m");
- goto out;
- }
-
- if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_signal, &ep_signal) < 0 ||
- epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_monitor, &ep_monitor) < 0) {
- r = log_error_errno(errno, "fail to add fds to epoll: %m");
- goto out;
- }
-
- /* Request TERM signal if parent exits.
- Ignore error, not much we can do in that case. */
- (void) prctl(PR_SET_PDEATHSIG, SIGTERM);
-
- /* Reset OOM score, we only protect the main daemon. */
- write_string_file("/proc/self/oom_score_adj", "0", 0);
-
- for (;;) {
- struct udev_event *udev_event;
- int fd_lock = -1;
-
- assert(dev);
-
- log_debug("seq %llu running", udev_device_get_seqnum(dev));
- udev_event = udev_event_new(dev);
- if (udev_event == NULL) {
- r = -ENOMEM;
- goto out;
- }
-
- if (arg_exec_delay > 0)
- udev_event->exec_delay = arg_exec_delay;
-
- /*
- * Take a shared lock on the device node; this establishes
- * a concept of device "ownership" to serialize device
- * access. External processes holding an exclusive lock will
- * cause udev to skip the event handling; in the case udev
- * acquired the lock, the external process can block until
- * udev has finished its event handling.
- */
- if (!streq_ptr(udev_device_get_action(dev), "remove") &&
- streq_ptr("block", udev_device_get_subsystem(dev)) &&
- !startswith(udev_device_get_sysname(dev), "dm-") &&
- !startswith(udev_device_get_sysname(dev), "md")) {
- struct udev_device *d = dev;
-
- if (streq_ptr("partition", udev_device_get_devtype(d)))
- d = udev_device_get_parent(d);
-
- if (d) {
- fd_lock = open(udev_device_get_devnode(d), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
- if (fd_lock >= 0 && flock(fd_lock, LOCK_SH|LOCK_NB) < 0) {
- log_debug_errno(errno, "Unable to flock(%s), skipping event handling: %m", udev_device_get_devnode(d));
- fd_lock = safe_close(fd_lock);
- goto skip;
- }
- }
- }
-
- /* needed for renaming netifs */
- udev_event->rtnl = rtnl;
-
- /* apply rules, create node, symlinks */
- udev_event_execute_rules(udev_event,
- arg_event_timeout_usec, arg_event_timeout_warn_usec,
- &manager->properties,
- manager->rules);
-
- udev_event_execute_run(udev_event,
- arg_event_timeout_usec, arg_event_timeout_warn_usec);
-
- if (udev_event->rtnl)
- /* in case rtnl was initialized */
- rtnl = sd_netlink_ref(udev_event->rtnl);
-
- /* apply/restore inotify watch */
- if (udev_event->inotify_watch) {
- udev_watch_begin(udev, dev);
- udev_device_update_db(dev);
- }
-
- safe_close(fd_lock);
-
- /* send processed event back to libudev listeners */
- udev_monitor_send_device(worker_monitor, NULL, dev);
-
-skip:
- log_debug("seq %llu processed", udev_device_get_seqnum(dev));
-
- /* send udevd the result of the event execution */
- r = worker_send_message(manager->worker_watch[WRITE_END]);
- if (r < 0)
- log_error_errno(r, "failed to send result of seq %llu to main daemon: %m",
- udev_device_get_seqnum(dev));
-
- udev_device_unref(dev);
- dev = NULL;
-
- udev_event_unref(udev_event);
-
- /* wait for more device messages from main udevd, or term signal */
- while (dev == NULL) {
- struct epoll_event ev[4];
- int fdcount;
- int i;
-
- fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);
- if (fdcount < 0) {
- if (errno == EINTR)
- continue;
- r = log_error_errno(errno, "failed to poll: %m");
- goto out;
- }
-
- for (i = 0; i < fdcount; i++) {
- if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLIN) {
- dev = udev_monitor_receive_device(worker_monitor);
- break;
- } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLIN) {
- struct signalfd_siginfo fdsi;
- ssize_t size;
-
- size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo));
- if (size != sizeof(struct signalfd_siginfo))
- continue;
- switch (fdsi.ssi_signo) {
- case SIGTERM:
- goto out;
- }
- }
- }
- }
- }
-out:
- udev_device_unref(dev);
- manager_free(manager);
- log_close();
- _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
- }
- case -1:
- event->state = EVENT_QUEUED;
- log_error_errno(errno, "fork of child failed: %m");
- break;
- default:
- {
- struct worker *worker;
-
- r = worker_new(&worker, manager, worker_monitor, pid);
- if (r < 0)
- return;
-
- worker_attach_event(worker, event);
-
- log_debug("seq %llu forked new worker ["PID_FMT"]", udev_device_get_seqnum(event->dev), pid);
- break;
- }
- }
-}
-
-static void event_run(Manager *manager, struct event *event) {
- struct worker *worker;
- Iterator i;
-
- assert(manager);
- assert(event);
-
- HASHMAP_FOREACH(worker, manager->workers, i) {
- ssize_t count;
-
- if (worker->state != WORKER_IDLE)
- continue;
-
- count = udev_monitor_send_device(manager->monitor, worker->monitor, event->dev);
- if (count < 0) {
- log_error_errno(errno, "worker ["PID_FMT"] did not accept message %zi (%m), kill it",
- worker->pid, count);
- kill(worker->pid, SIGKILL);
- worker->state = WORKER_KILLED;
- continue;
- }
- worker_attach_event(worker, event);
- return;
- }
-
- if (hashmap_size(manager->workers) >= arg_children_max) {
- if (arg_children_max > 1)
- log_debug("maximum number (%i) of children reached", hashmap_size(manager->workers));
- return;
- }
-
- /* start new worker and pass initial device */
- worker_spawn(manager, event);
-}
-
-static int event_queue_insert(Manager *manager, struct udev_device *dev) {
- struct event *event;
- int r;
-
- assert(manager);
- assert(dev);
-
- /* only one process can add events to the queue */
- if (manager->pid == 0)
- manager->pid = getpid();
-
- assert(manager->pid == getpid());
-
- event = new0(struct event, 1);
- if (!event)
- return -ENOMEM;
-
- event->udev = udev_device_get_udev(dev);
- event->manager = manager;
- event->dev = dev;
- event->dev_kernel = udev_device_shallow_clone(dev);
- udev_device_copy_properties(event->dev_kernel, dev);
- event->seqnum = udev_device_get_seqnum(dev);
- event->devpath = udev_device_get_devpath(dev);
- event->devpath_len = strlen(event->devpath);
- event->devpath_old = udev_device_get_devpath_old(dev);
- event->devnum = udev_device_get_devnum(dev);
- event->is_block = streq("block", udev_device_get_subsystem(dev));
- event->ifindex = udev_device_get_ifindex(dev);
-
- log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),
- udev_device_get_action(dev), udev_device_get_subsystem(dev));
-
- event->state = EVENT_QUEUED;
-
- if (udev_list_node_is_empty(&manager->events)) {
- r = touch("/run/udev/queue");
- if (r < 0)
- log_warning_errno(r, "could not touch /run/udev/queue: %m");
- }
-
- udev_list_node_append(&event->node, &manager->events);
-
- return 0;
-}
-
-static void manager_kill_workers(Manager *manager) {
- struct worker *worker;
- Iterator i;
-
- assert(manager);
-
- HASHMAP_FOREACH(worker, manager->workers, i) {
- if (worker->state == WORKER_KILLED)
- continue;
-
- worker->state = WORKER_KILLED;
- kill(worker->pid, SIGTERM);
- }
-}
-
-/* lookup event for identical, parent, child device */
-static bool is_devpath_busy(Manager *manager, struct event *event) {
- struct udev_list_node *loop;
- size_t common;
-
- /* check if queue contains events we depend on */
- udev_list_node_foreach(loop, &manager->events) {
- struct event *loop_event = node_to_event(loop);
-
- /* we already found a later event, earlier can not block us, no need to check again */
- if (loop_event->seqnum < event->delaying_seqnum)
- continue;
-
- /* event we checked earlier still exists, no need to check again */
- if (loop_event->seqnum == event->delaying_seqnum)
- return true;
-
- /* found ourself, no later event can block us */
- if (loop_event->seqnum >= event->seqnum)
- break;
-
- /* check major/minor */
- if (major(event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block)
- return true;
-
- /* check network device ifindex */
- if (event->ifindex != 0 && event->ifindex == loop_event->ifindex)
- return true;
-
- /* check our old name */
- if (event->devpath_old != NULL && streq(loop_event->devpath, event->devpath_old)) {
- event->delaying_seqnum = loop_event->seqnum;
- return true;
- }
-
- /* compare devpath */
- common = MIN(loop_event->devpath_len, event->devpath_len);
-
- /* one devpath is contained in the other? */
- if (memcmp(loop_event->devpath, event->devpath, common) != 0)
- continue;
-
- /* identical device event found */
- if (loop_event->devpath_len == event->devpath_len) {
- /* devices names might have changed/swapped in the meantime */
- if (major(event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block))
- continue;
- if (event->ifindex != 0 && event->ifindex != loop_event->ifindex)
- continue;
- event->delaying_seqnum = loop_event->seqnum;
- return true;
- }
-
- /* parent device event found */
- if (event->devpath[common] == '/') {
- event->delaying_seqnum = loop_event->seqnum;
- return true;
- }
-
- /* child device event found */
- if (loop_event->devpath[common] == '/') {
- event->delaying_seqnum = loop_event->seqnum;
- return true;
- }
-
- /* no matching device */
- continue;
- }
-
- return false;
-}
-
-static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) {
- Manager *manager = userdata;
-
- assert(manager);
-
- log_error_errno(ETIMEDOUT, "giving up waiting for workers to finish");
-
- sd_event_exit(manager->event, -ETIMEDOUT);
-
- return 1;
-}
-
-static void manager_exit(Manager *manager) {
- uint64_t usec;
- int r;
-
- assert(manager);
-
- manager->exit = true;
-
- sd_notify(false,
- "STOPPING=1\n"
- "STATUS=Starting shutdown...");
-
- /* close sources of new events and discard buffered events */
- manager->ctrl_event = sd_event_source_unref(manager->ctrl_event);
- manager->ctrl = udev_ctrl_unref(manager->ctrl);
-
- manager->inotify_event = sd_event_source_unref(manager->inotify_event);
- manager->fd_inotify = safe_close(manager->fd_inotify);
-
- manager->uevent_event = sd_event_source_unref(manager->uevent_event);
- manager->monitor = udev_monitor_unref(manager->monitor);
-
- /* discard queued events and kill workers */
- event_queue_cleanup(manager, EVENT_QUEUED);
- manager_kill_workers(manager);
-
- assert_se(sd_event_now(manager->event, clock_boottime_or_monotonic(), &usec) >= 0);
-
- r = sd_event_add_time(manager->event, NULL, clock_boottime_or_monotonic(),
- usec + 30 * USEC_PER_SEC, USEC_PER_SEC, on_exit_timeout, manager);
- if (r < 0)
- return;
-}
-
-/* reload requested, HUP signal received, rules changed, builtin changed */
-static void manager_reload(Manager *manager) {
-
- assert(manager);
-
- sd_notify(false,
- "RELOADING=1\n"
- "STATUS=Flushing configuration...");
-
- manager_kill_workers(manager);
- manager->rules = udev_rules_unref(manager->rules);
- udev_builtin_exit(manager->udev);
-
- sd_notify(false,
- "READY=1\n"
- "STATUS=Processing...");
-}
-
-static void event_queue_start(Manager *manager) {
- struct udev_list_node *loop;
- usec_t usec;
-
- assert(manager);
-
- if (udev_list_node_is_empty(&manager->events) ||
- manager->exit || manager->stop_exec_queue)
- return;
-
- assert_se(sd_event_now(manager->event, clock_boottime_or_monotonic(), &usec) >= 0);
- /* check for changed config, every 3 seconds at most */
- if (manager->last_usec == 0 ||
- (usec - manager->last_usec) > 3 * USEC_PER_SEC) {
- if (udev_rules_check_timestamp(manager->rules) ||
- udev_builtin_validate(manager->udev))
- manager_reload(manager);
-
- manager->last_usec = usec;
- }
-
- udev_builtin_init(manager->udev);
-
- if (!manager->rules) {
- manager->rules = udev_rules_new(manager->udev, arg_resolve_names);
- if (!manager->rules)
- return;
- }
-
- udev_list_node_foreach(loop, &manager->events) {
- struct event *event = node_to_event(loop);
-
- if (event->state != EVENT_QUEUED)
- continue;
-
- /* do not start event if parent or child event is still running */
- if (is_devpath_busy(manager, event))
- continue;
-
- event_run(manager, event);
- }
-}
-
-static void event_queue_cleanup(Manager *manager, enum event_state match_type) {
- struct udev_list_node *loop, *tmp;
-
- udev_list_node_foreach_safe(loop, tmp, &manager->events) {
- struct event *event = node_to_event(loop);
-
- if (match_type != EVENT_UNDEF && match_type != event->state)
- continue;
-
- event_free(event);
- }
-}
-
-static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- Manager *manager = userdata;
-
- assert(manager);
-
- for (;;) {
- struct worker_message msg;
- struct iovec iovec = {
- .iov_base = &msg,
- .iov_len = sizeof(msg),
- };
- union {
- struct cmsghdr cmsghdr;
- uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
- } control = {};
- struct msghdr msghdr = {
- .msg_iov = &iovec,
- .msg_iovlen = 1,
- .msg_control = &control,
- .msg_controllen = sizeof(control),
- };
- struct cmsghdr *cmsg;
- ssize_t size;
- struct ucred *ucred = NULL;
- struct worker *worker;
-
- size = recvmsg(fd, &msghdr, MSG_DONTWAIT);
- if (size < 0) {
- if (errno == EINTR)
- continue;
- else if (errno == EAGAIN)
- /* nothing more to read */
- break;
-
- return log_error_errno(errno, "failed to receive message: %m");
- } else if (size != sizeof(struct worker_message)) {
- log_warning_errno(EIO, "ignoring worker message with invalid size %zi bytes", size);
- continue;
- }
-
- CMSG_FOREACH(cmsg, &msghdr) {
- if (cmsg->cmsg_level == SOL_SOCKET &&
- cmsg->cmsg_type == SCM_CREDENTIALS &&
- cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred)))
- ucred = (struct ucred*) CMSG_DATA(cmsg);
- }
-
- if (!ucred || ucred->pid <= 0) {
- log_warning_errno(EIO, "ignoring worker message without valid PID");
- continue;
- }
-
- /* lookup worker who sent the signal */
- worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid));
- if (!worker) {
- log_debug("worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid);
- continue;
- }
-
- if (worker->state != WORKER_KILLED)
- worker->state = WORKER_IDLE;
-
- /* worker returned */
- event_free(worker->event);
- }
-
- /* we have free workers, try to schedule events */
- event_queue_start(manager);
-
- return 1;
-}
-
-static int on_uevent(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- Manager *manager = userdata;
- struct udev_device *dev;
- int r;
-
- assert(manager);
-
- dev = udev_monitor_receive_device(manager->monitor);
- if (dev) {
- udev_device_ensure_usec_initialized(dev, NULL);
- r = event_queue_insert(manager, dev);
- if (r < 0)
- udev_device_unref(dev);
- else
- /* we have fresh events, try to schedule them */
- event_queue_start(manager);
- }
-
- return 1;
-}
-
-/* receive the udevd message from userspace */
-static int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- Manager *manager = userdata;
- _cleanup_udev_ctrl_connection_unref_ struct udev_ctrl_connection *ctrl_conn = NULL;
- _cleanup_udev_ctrl_msg_unref_ struct udev_ctrl_msg *ctrl_msg = NULL;
- const char *str;
- int i;
-
- assert(manager);
-
- ctrl_conn = udev_ctrl_get_connection(manager->ctrl);
- if (!ctrl_conn)
- return 1;
-
- ctrl_msg = udev_ctrl_receive_msg(ctrl_conn);
- if (!ctrl_msg)
- return 1;
-
- i = udev_ctrl_get_set_log_level(ctrl_msg);
- if (i >= 0) {
- log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i);
- log_set_max_level(i);
- manager_kill_workers(manager);
- }
-
- if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) {
- log_debug("udevd message (STOP_EXEC_QUEUE) received");
- manager->stop_exec_queue = true;
- }
-
- if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) {
- log_debug("udevd message (START_EXEC_QUEUE) received");
- manager->stop_exec_queue = false;
- event_queue_start(manager);
- }
-
- if (udev_ctrl_get_reload(ctrl_msg) > 0) {
- log_debug("udevd message (RELOAD) received");
- manager_reload(manager);
- }
-
- str = udev_ctrl_get_set_env(ctrl_msg);
- if (str != NULL) {
- _cleanup_free_ char *key = NULL;
-
- key = strdup(str);
- if (key) {
- char *val;
-
- val = strchr(key, '=');
- if (val != NULL) {
- val[0] = '\0';
- val = &val[1];
- if (val[0] == '\0') {
- log_debug("udevd message (ENV) received, unset '%s'", key);
- udev_list_entry_add(&manager->properties, key, NULL);
- } else {
- log_debug("udevd message (ENV) received, set '%s=%s'", key, val);
- udev_list_entry_add(&manager->properties, key, val);
- }
- } else
- log_error("wrong key format '%s'", key);
- }
- manager_kill_workers(manager);
- }
-
- i = udev_ctrl_get_set_children_max(ctrl_msg);
- if (i >= 0) {
- log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i);
- arg_children_max = i;
- }
-
- if (udev_ctrl_get_ping(ctrl_msg) > 0)
- log_debug("udevd message (SYNC) received");
-
- if (udev_ctrl_get_exit(ctrl_msg) > 0) {
- log_debug("udevd message (EXIT) received");
- manager_exit(manager);
- /* keep reference to block the client until we exit
- TODO: deal with several blocking exit requests */
- manager->ctrl_conn_blocking = udev_ctrl_connection_ref(ctrl_conn);
- }
-
- return 1;
-}
-
-static int synthesize_change(struct udev_device *dev) {
- char filename[UTIL_PATH_SIZE];
- int r;
-
- if (streq_ptr("block", udev_device_get_subsystem(dev)) &&
- streq_ptr("disk", udev_device_get_devtype(dev)) &&
- !startswith(udev_device_get_sysname(dev), "dm-")) {
- bool part_table_read = false;
- bool has_partitions = false;
- int fd;
- struct udev *udev = udev_device_get_udev(dev);
- _cleanup_udev_enumerate_unref_ struct udev_enumerate *e = NULL;
- struct udev_list_entry *item;
-
- /*
- * Try to re-read the partition table. This only succeeds if
- * none of the devices is busy. The kernel returns 0 if no
- * partition table is found, and we will not get an event for
- * the disk.
- */
- fd = open(udev_device_get_devnode(dev), O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NONBLOCK);
- if (fd >= 0) {
- r = flock(fd, LOCK_EX|LOCK_NB);
- if (r >= 0)
- r = ioctl(fd, BLKRRPART, 0);
-
- close(fd);
- if (r >= 0)
- part_table_read = true;
- }
-
- /* search for partitions */
- e = udev_enumerate_new(udev);
- if (!e)
- return -ENOMEM;
-
- r = udev_enumerate_add_match_parent(e, dev);
- if (r < 0)
- return r;
-
- r = udev_enumerate_add_match_subsystem(e, "block");
- if (r < 0)
- return r;
-
- r = udev_enumerate_scan_devices(e);
- if (r < 0)
- return r;
-
- udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
- _cleanup_udev_device_unref_ struct udev_device *d = NULL;
-
- d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
- if (!d)
- continue;
-
- if (!streq_ptr("partition", udev_device_get_devtype(d)))
- continue;
-
- has_partitions = true;
- break;
- }
-
- /*
- * We have partitions and re-read the table, the kernel already sent
- * out a "change" event for the disk, and "remove/add" for all
- * partitions.
- */
- if (part_table_read && has_partitions)
- return 0;
-
- /*
- * We have partitions but re-reading the partition table did not
- * work, synthesize "change" for the disk and all partitions.
- */
- log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
- strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
- write_string_file(filename, "change", WRITE_STRING_FILE_CREATE);
-
- udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e)) {
- _cleanup_udev_device_unref_ struct udev_device *d = NULL;
-
- d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item));
- if (!d)
- continue;
-
- if (!streq_ptr("partition", udev_device_get_devtype(d)))
- continue;
-
- log_debug("device %s closed, synthesising partition '%s' 'change'",
- udev_device_get_devnode(dev), udev_device_get_devnode(d));
- strscpyl(filename, sizeof(filename), udev_device_get_syspath(d), "/uevent", NULL);
- write_string_file(filename, "change", WRITE_STRING_FILE_CREATE);
- }
-
- return 0;
- }
-
- log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
- strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
- write_string_file(filename, "change", WRITE_STRING_FILE_CREATE);
-
- return 0;
-}
-
-static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- Manager *manager = userdata;
- union inotify_event_buffer buffer;
- struct inotify_event *e;
- ssize_t l;
-
- assert(manager);
-
- l = read(fd, &buffer, sizeof(buffer));
- if (l < 0) {
- if (errno == EAGAIN || errno == EINTR)
- return 1;
-
- return log_error_errno(errno, "Failed to read inotify fd: %m");
- }
-
- FOREACH_INOTIFY_EVENT(e, buffer, l) {
- _cleanup_udev_device_unref_ struct udev_device *dev = NULL;
-
- dev = udev_watch_lookup(manager->udev, e->wd);
- if (!dev)
- continue;
-
- log_debug("inotify event: %x for %s", e->mask, udev_device_get_devnode(dev));
- if (e->mask & IN_CLOSE_WRITE) {
- synthesize_change(dev);
-
- /* settle might be waiting on us to determine the queue
- * state. If we just handled an inotify event, we might have
- * generated a "change" event, but we won't have queued up
- * the resultant uevent yet. Do that.
- */
- on_uevent(NULL, -1, 0, manager);
- } else if (e->mask & IN_IGNORED)
- udev_watch_end(manager->udev, dev);
- }
-
- return 1;
-}
-
-static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
- Manager *manager = userdata;
-
- assert(manager);
-
- manager_exit(manager);
-
- return 1;
-}
-
-static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
- Manager *manager = userdata;
-
- assert(manager);
-
- manager_reload(manager);
-
- return 1;
-}
-
-static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
- Manager *manager = userdata;
-
- assert(manager);
-
- for (;;) {
- pid_t pid;
- int status;
- struct worker *worker;
-
- pid = waitpid(-1, &status, WNOHANG);
- if (pid <= 0)
- break;
-
- worker = hashmap_get(manager->workers, PID_TO_PTR(pid));
- if (!worker) {
- log_warning("worker ["PID_FMT"] is unknown, ignoring", pid);
- continue;
- }
-
- if (WIFEXITED(status)) {
- if (WEXITSTATUS(status) == 0)
- log_debug("worker ["PID_FMT"] exited", pid);
- else
- log_warning("worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status));
- } else if (WIFSIGNALED(status)) {
- log_warning("worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), strsignal(WTERMSIG(status)));
- } else if (WIFSTOPPED(status)) {
- log_info("worker ["PID_FMT"] stopped", pid);
- continue;
- } else if (WIFCONTINUED(status)) {
- log_info("worker ["PID_FMT"] continued", pid);
- continue;
- } else
- log_warning("worker ["PID_FMT"] exit with status 0x%04x", pid, status);
-
- if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
- if (worker->event) {
- log_error("worker ["PID_FMT"] failed while handling '%s'", pid, worker->event->devpath);
- /* delete state from disk */
- udev_device_delete_db(worker->event->dev);
- udev_device_tag_index(worker->event->dev, NULL, false);
- /* forward kernel event without amending it */
- udev_monitor_send_device(manager->monitor, NULL, worker->event->dev_kernel);
- }
- }
-
- worker_free(worker);
- }
-
- /* we can start new workers, try to schedule events */
- event_queue_start(manager);
-
- return 1;
-}
-
-static int on_post(sd_event_source *s, void *userdata) {
- Manager *manager = userdata;
- int r;
-
- assert(manager);
-
- if (udev_list_node_is_empty(&manager->events)) {
- /* no pending events */
- if (!hashmap_isempty(manager->workers)) {
- /* there are idle workers */
- log_debug("cleanup idle workers");
- manager_kill_workers(manager);
- } else {
- /* we are idle */
- if (manager->exit) {
- r = sd_event_exit(manager->event, 0);
- if (r < 0)
- return r;
- } else if (manager->cgroup)
- /* cleanup possible left-over processes in our cgroup */
- cg_kill(SYSTEMD_CGROUP_CONTROLLER, manager->cgroup, SIGKILL, CGROUP_IGNORE_SELF, NULL, NULL, NULL);
- }
- }
-
- return 1;
-}
-
-static int listen_fds(int *rctrl, int *rnetlink) {
- _cleanup_udev_unref_ struct udev *udev = NULL;
- int ctrl_fd = -1, netlink_fd = -1;
- int fd, n, r;
-
- assert(rctrl);
- assert(rnetlink);
-
- n = sd_listen_fds(true);
- if (n < 0)
- return n;
-
- for (fd = SD_LISTEN_FDS_START; fd < n + SD_LISTEN_FDS_START; fd++) {
- if (sd_is_socket(fd, AF_LOCAL, SOCK_SEQPACKET, -1)) {
- if (ctrl_fd >= 0)
- return -EINVAL;
- ctrl_fd = fd;
- continue;
- }
-
- if (sd_is_socket(fd, AF_NETLINK, SOCK_RAW, -1)) {
- if (netlink_fd >= 0)
- return -EINVAL;
- netlink_fd = fd;
- continue;
- }
-
- return -EINVAL;
- }
-
- if (ctrl_fd < 0) {
- _cleanup_udev_ctrl_unref_ struct udev_ctrl *ctrl = NULL;
-
- udev = udev_new();
- if (!udev)
- return -ENOMEM;
-
- ctrl = udev_ctrl_new(udev);
- if (!ctrl)
- return log_error_errno(EINVAL, "error initializing udev control socket");
-
- r = udev_ctrl_enable_receiving(ctrl);
- if (r < 0)
- return log_error_errno(EINVAL, "error binding udev control socket");
-
- fd = udev_ctrl_get_fd(ctrl);
- if (fd < 0)
- return log_error_errno(EIO, "could not get ctrl fd");
-
- ctrl_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
- if (ctrl_fd < 0)
- return log_error_errno(errno, "could not dup ctrl fd: %m");
- }
-
- if (netlink_fd < 0) {
- _cleanup_udev_monitor_unref_ struct udev_monitor *monitor = NULL;
-
- if (!udev) {
- udev = udev_new();
- if (!udev)
- return -ENOMEM;
- }
-
- monitor = udev_monitor_new_from_netlink(udev, "kernel");
- if (!monitor)
- return log_error_errno(EINVAL, "error initializing netlink socket");
-
- (void) udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024);
-
- r = udev_monitor_enable_receiving(monitor);
- if (r < 0)
- return log_error_errno(EINVAL, "error binding netlink socket");
-
- fd = udev_monitor_get_fd(monitor);
- if (fd < 0)
- return log_error_errno(netlink_fd, "could not get uevent fd: %m");
-
- netlink_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
- if (ctrl_fd < 0)
- return log_error_errno(errno, "could not dup netlink fd: %m");
- }
-
- *rctrl = ctrl_fd;
- *rnetlink = netlink_fd;
-
- return 0;
-}
-
-/*
- * read the kernel command line, in case we need to get into debug mode
- * udev.log-priority=<level> syslog priority
- * udev.children-max=<number of workers> events are fully serialized if set to 1
- * udev.exec-delay=<number of seconds> delay execution of every executed program
- * udev.event-timeout=<number of seconds> seconds to wait before terminating an event
- */
-static int parse_proc_cmdline_item(const char *key, const char *value) {
- const char *full_key = key;
- int r;
-
- assert(key);
-
- if (!value)
- return 0;
-
- if (startswith(key, "rd."))
- key += strlen("rd.");
-
- if (startswith(key, "udev."))
- key += strlen("udev.");
- else
- return 0;
-
- if (streq(key, "log-priority")) {
- int prio;
-
- prio = util_log_priority(value);
- if (prio < 0)
- goto invalid;
- log_set_max_level(prio);
- } else if (streq(key, "children-max")) {
- r = safe_atou(value, &arg_children_max);
- if (r < 0)
- goto invalid;
- } else if (streq(key, "exec-delay")) {
- r = safe_atoi(value, &arg_exec_delay);
- if (r < 0)
- goto invalid;
- } else if (streq(key, "event-timeout")) {
- r = safe_atou64(value, &arg_event_timeout_usec);
- if (r < 0)
- goto invalid;
- arg_event_timeout_usec *= USEC_PER_SEC;
- arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1;
- }
-
- return 0;
-invalid:
- log_warning("invalid %s ignored: %s", full_key, value);
- return 0;
-}
-
-static void help(void) {
- printf("%s [OPTIONS...]\n\n"
- "Manages devices.\n\n"
- " -h --help Print this message\n"
- " --version Print version of the program\n"
- " --daemon Detach and run in the background\n"
- " --debug Enable debug output\n"
- " --children-max=INT Set maximum number of workers\n"
- " --exec-delay=SECONDS Seconds to wait before executing RUN=\n"
- " --event-timeout=SECONDS Seconds to wait before terminating an event\n"
- " --resolve-names=early|late|never\n"
- " When to resolve users and groups\n"
- , program_invocation_short_name);
-}
-
-static int parse_argv(int argc, char *argv[]) {
- static const struct option options[] = {
- { "daemon", no_argument, NULL, 'd' },
- { "debug", no_argument, NULL, 'D' },
- { "children-max", required_argument, NULL, 'c' },
- { "exec-delay", required_argument, NULL, 'e' },
- { "event-timeout", required_argument, NULL, 't' },
- { "resolve-names", required_argument, NULL, 'N' },
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, 'V' },
- {}
- };
-
- int c;
-
- assert(argc >= 0);
- assert(argv);
-
- while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL)) >= 0) {
- int r;
-
- switch (c) {
-
- case 'd':
- arg_daemonize = true;
- break;
- case 'c':
- r = safe_atou(optarg, &arg_children_max);
- if (r < 0)
- log_warning("Invalid --children-max ignored: %s", optarg);
- break;
- case 'e':
- r = safe_atoi(optarg, &arg_exec_delay);
- if (r < 0)
- log_warning("Invalid --exec-delay ignored: %s", optarg);
- break;
- case 't':
- r = safe_atou64(optarg, &arg_event_timeout_usec);
- if (r < 0)
- log_warning("Invalid --event-timeout ignored: %s", optarg);
- else {
- arg_event_timeout_usec *= USEC_PER_SEC;
- arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1;
- }
- break;
- case 'D':
- arg_debug = true;
- break;
- case 'N':
- if (streq(optarg, "early")) {
- arg_resolve_names = 1;
- } else if (streq(optarg, "late")) {
- arg_resolve_names = 0;
- } else if (streq(optarg, "never")) {
- arg_resolve_names = -1;
- } else {
- log_error("resolve-names must be early, late or never");
- return 0;
- }
- break;
- case 'h':
- help();
- return 0;
- case 'V':
- printf("%s\n", VERSION);
- return 0;
- case '?':
- return -EINVAL;
- default:
- assert_not_reached("Unhandled option");
-
- }
- }
-
- return 1;
-}
-
-static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) {
- _cleanup_(manager_freep) Manager *manager = NULL;
- int r, fd_worker, one = 1;
-
- assert(ret);
- assert(fd_ctrl >= 0);
- assert(fd_uevent >= 0);
-
- manager = new0(Manager, 1);
- if (!manager)
- return log_oom();
-
- manager->fd_inotify = -1;
- manager->worker_watch[WRITE_END] = -1;
- manager->worker_watch[READ_END] = -1;
-
- manager->udev = udev_new();
- if (!manager->udev)
- return log_error_errno(errno, "could not allocate udev context: %m");
-
- udev_builtin_init(manager->udev);
-
- manager->rules = udev_rules_new(manager->udev, arg_resolve_names);
- if (!manager->rules)
- return log_error_errno(ENOMEM, "error reading rules");
-
- udev_list_node_init(&manager->events);
- udev_list_init(manager->udev, &manager->properties, true);
-
- manager->cgroup = cgroup;
-
- manager->ctrl = udev_ctrl_new_from_fd(manager->udev, fd_ctrl);
- if (!manager->ctrl)
- return log_error_errno(EINVAL, "error taking over udev control socket");
-
- manager->monitor = udev_monitor_new_from_netlink_fd(manager->udev, "kernel", fd_uevent);
- if (!manager->monitor)
- return log_error_errno(EINVAL, "error taking over netlink socket");
-
- /* unnamed socket from workers to the main daemon */
- r = socketpair(AF_LOCAL, SOCK_DGRAM|SOCK_CLOEXEC, 0, manager->worker_watch);
- if (r < 0)
- return log_error_errno(errno, "error creating socketpair: %m");
-
- fd_worker = manager->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");
-
- manager->fd_inotify = udev_watch_init(manager->udev);
- if (manager->fd_inotify < 0)
- return log_error_errno(ENOMEM, "error initializing inotify");
-
- udev_watch_restore(manager->udev);
-
- /* block and listen to all signals on signalfd */
- assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0);
-
- r = sd_event_default(&manager->event);
- if (r < 0)
- return log_error_errno(r, "could not allocate event loop: %m");
-
- r = sd_event_add_signal(manager->event, NULL, SIGINT, on_sigterm, manager);
- if (r < 0)
- return log_error_errno(r, "error creating sigint event source: %m");
-
- r = sd_event_add_signal(manager->event, NULL, SIGTERM, on_sigterm, manager);
- if (r < 0)
- return log_error_errno(r, "error creating sigterm event source: %m");
-
- r = sd_event_add_signal(manager->event, NULL, SIGHUP, on_sighup, manager);
- if (r < 0)
- return log_error_errno(r, "error creating sighup event source: %m");
-
- r = sd_event_add_signal(manager->event, NULL, SIGCHLD, on_sigchld, manager);
- if (r < 0)
- return log_error_errno(r, "error creating sigchld event source: %m");
-
- r = sd_event_set_watchdog(manager->event, true);
- if (r < 0)
- return log_error_errno(r, "error creating watchdog event source: %m");
-
- r = sd_event_add_io(manager->event, &manager->ctrl_event, fd_ctrl, EPOLLIN, on_ctrl_msg, manager);
- if (r < 0)
- return log_error_errno(r, "error creating ctrl event source: %m");
-
- /* This needs to be after the inotify and uevent handling, to make sure
- * that the ping is send back after fully processing the pending uevents
- * (including the synthetic ones we may create due to inotify events).
- */
- r = sd_event_source_set_priority(manager->ctrl_event, SD_EVENT_PRIORITY_IDLE);
- if (r < 0)
- return log_error_errno(r, "cold not set IDLE event priority for ctrl event source: %m");
-
- r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLIN, on_inotify, manager);
- if (r < 0)
- return log_error_errno(r, "error creating inotify event source: %m");
-
- r = sd_event_add_io(manager->event, &manager->uevent_event, fd_uevent, EPOLLIN, on_uevent, manager);
- if (r < 0)
- return log_error_errno(r, "error creating uevent event source: %m");
-
- r = sd_event_add_io(manager->event, NULL, fd_worker, EPOLLIN, on_worker, manager);
- if (r < 0)
- return log_error_errno(r, "error creating worker event source: %m");
-
- r = sd_event_add_post(manager->event, NULL, on_post, manager);
- if (r < 0)
- return log_error_errno(r, "error creating post event source: %m");
-
- *ret = manager;
- manager = NULL;
-
- return 0;
-}
-
-static int run(int fd_ctrl, int fd_uevent, const char *cgroup) {
- _cleanup_(manager_freep) Manager *manager = NULL;
- int r;
-
- r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup);
- if (r < 0) {
- r = log_error_errno(r, "failed to allocate manager object: %m");
- goto exit;
- }
-
- r = udev_rules_apply_static_dev_perms(manager->rules);
- if (r < 0)
- log_error_errno(r, "failed to apply permissions on static device nodes: %m");
-
- (void) sd_notify(false,
- "READY=1\n"
- "STATUS=Processing...");
-
- r = sd_event_loop(manager->event);
- if (r < 0) {
- log_error_errno(r, "event loop failed: %m");
- goto exit;
- }
-
- sd_event_get_exit_code(manager->event, &r);
-
-exit:
- sd_notify(false,
- "STOPPING=1\n"
- "STATUS=Shutting down...");
- if (manager)
- udev_ctrl_cleanup(manager->ctrl);
- return r;
-}
-
-int main(int argc, char *argv[]) {
- _cleanup_free_ char *cgroup = NULL;
- int fd_ctrl = -1, fd_uevent = -1;
- int r;
-
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
-
- r = parse_argv(argc, argv);
- if (r <= 0)
- goto exit;
-
- r = parse_proc_cmdline(parse_proc_cmdline_item);
- if (r < 0)
- log_warning_errno(r, "failed to parse kernel command line, ignoring: %m");
-
- if (arg_debug) {
- log_set_target(LOG_TARGET_CONSOLE);
- log_set_max_level(LOG_DEBUG);
- }
-
- if (getuid() != 0) {
- r = log_error_errno(EPERM, "root privileges required");
- goto exit;
- }
-
- 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);
- }
-
- /* set umask before creating any file/directory */
- r = chdir("/");
- if (r < 0) {
- r = log_error_errno(errno, "could not change dir to /: %m");
- goto exit;
- }
-
- umask(022);
-
- r = mac_selinux_init();
- if (r < 0) {
- log_error_errno(r, "could not initialize labelling: %m");
- goto exit;
- }
-
- r = mkdir("/run/udev", 0755);
- if (r < 0 && errno != EEXIST) {
- r = log_error_errno(errno, "could not create /run/udev: %m");
- goto exit;
- }
-
- dev_setup(NULL, UID_INVALID, GID_INVALID);
-
- if (getppid() == 1) {
- /* get our own cgroup, we regularly kill everything udev has left behind
- we only do this on systemd systems, and only if we are directly spawned
- by PID1. otherwise we are not guaranteed to have a dedicated cgroup */
- r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 0, &cgroup);
- if (r < 0) {
- if (r == -ENOENT || r == -ENOMEDIUM)
- log_debug_errno(r, "did not find dedicated cgroup: %m");
- else
- log_warning_errno(r, "failed to get cgroup: %m");
- }
- }
-
- r = listen_fds(&fd_ctrl, &fd_uevent);
- if (r < 0) {
- r = log_error_errno(r, "could not listen on fds: %m");
- goto exit;
- }
-
- if (arg_daemonize) {
- pid_t pid;
-
- log_info("starting version " VERSION);
-
- /* connect /dev/null to stdin, stdout, stderr */
- if (log_get_max_level() < LOG_DEBUG)
- (void) make_null_stdio();
-
- pid = fork();
- switch (pid) {
- case 0:
- break;
- case -1:
- r = log_error_errno(errno, "fork of daemon failed: %m");
- goto exit;
- default:
- mac_selinux_finish();
- log_close();
- _exit(EXIT_SUCCESS);
- }
-
- setsid();
-
- write_string_file("/proc/self/oom_score_adj", "-1000", 0);
- }
-
- r = run(fd_ctrl, fd_uevent, cgroup);
-
-exit:
- mac_selinux_finish();
- log_close();
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}