| File: | build-scan/../src/udev/udevd.c |
| Warning: | line 437, column 49 Value stored to 'fd_lock' is never read |
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| 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 2 | /* |
| 3 | * Copyright © 2004 Chris Friesen <chris_friesen@sympatico.ca> |
| 4 | * Copyright © 2009 Canonical Ltd. |
| 5 | * Copyright © 2009 Scott James Remnant <scott@netsplit.com> |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #include <errno(*__errno_location ()).h> |
| 10 | #include <fcntl.h> |
| 11 | #include <getopt.h> |
| 12 | #include <signal.h> |
| 13 | #include <stdbool.h> |
| 14 | #include <stddef.h> |
| 15 | #include <stdio.h> |
| 16 | #include <stdlib.h> |
| 17 | #include <string.h> |
| 18 | #include <sys/epoll.h> |
| 19 | #include <sys/file.h> |
| 20 | #include <sys/inotify.h> |
| 21 | #include <sys/ioctl.h> |
| 22 | #include <sys/mount.h> |
| 23 | #include <sys/prctl.h> |
| 24 | #include <sys/signalfd.h> |
| 25 | #include <sys/socket.h> |
| 26 | #include <sys/stat.h> |
| 27 | #include <sys/time.h> |
| 28 | #include <sys/wait.h> |
| 29 | #include <unistd.h> |
| 30 | |
| 31 | #include "sd-daemon.h" |
| 32 | #include "sd-event.h" |
| 33 | |
| 34 | #include "alloc-util.h" |
| 35 | #include "cgroup-util.h" |
| 36 | #include "cpu-set-util.h" |
| 37 | #include "dev-setup.h" |
| 38 | #include "fd-util.h" |
| 39 | #include "fileio.h" |
| 40 | #include "format-util.h" |
| 41 | #include "fs-util.h" |
| 42 | #include "hashmap.h" |
| 43 | #include "io-util.h" |
| 44 | #include "list.h" |
| 45 | #include "netlink-util.h" |
| 46 | #include "parse-util.h" |
| 47 | #include "proc-cmdline.h" |
| 48 | #include "process-util.h" |
| 49 | #include "selinux-util.h" |
| 50 | #include "signal-util.h" |
| 51 | #include "socket-util.h" |
| 52 | #include "string-util.h" |
| 53 | #include "terminal-util.h" |
| 54 | #include "udev-util.h" |
| 55 | #include "udev.h" |
| 56 | #include "user-util.h" |
| 57 | |
| 58 | static bool_Bool arg_debug = false0; |
| 59 | static int arg_daemonize = false0; |
| 60 | static int arg_resolve_names = 1; |
| 61 | static unsigned arg_children_max; |
| 62 | static int arg_exec_delay; |
| 63 | static usec_t arg_event_timeout_usec = 180 * USEC_PER_SEC((usec_t) 1000000ULL); |
| 64 | static usec_t arg_event_timeout_warn_usec = 180 * USEC_PER_SEC((usec_t) 1000000ULL) / 3; |
| 65 | |
| 66 | typedef struct Manager { |
| 67 | struct udev *udev; |
| 68 | sd_event *event; |
| 69 | Hashmap *workers; |
| 70 | LIST_HEAD(struct event, events)struct event *events; |
| 71 | const char *cgroup; |
| 72 | pid_t pid; /* the process that originally allocated the manager object */ |
| 73 | |
| 74 | struct udev_rules *rules; |
| 75 | struct udev_list properties; |
| 76 | |
| 77 | struct udev_monitor *monitor; |
| 78 | struct udev_ctrl *ctrl; |
| 79 | struct udev_ctrl_connection *ctrl_conn_blocking; |
| 80 | int fd_inotify; |
| 81 | int worker_watch[2]; |
| 82 | |
| 83 | sd_event_source *ctrl_event; |
| 84 | sd_event_source *uevent_event; |
| 85 | sd_event_source *inotify_event; |
| 86 | |
| 87 | usec_t last_usec; |
| 88 | |
| 89 | bool_Bool stop_exec_queue:1; |
| 90 | bool_Bool exit:1; |
| 91 | } Manager; |
| 92 | |
| 93 | enum event_state { |
| 94 | EVENT_UNDEF, |
| 95 | EVENT_QUEUED, |
| 96 | EVENT_RUNNING, |
| 97 | }; |
| 98 | |
| 99 | struct event { |
| 100 | LIST_FIELDS(struct event, event)struct event *event_next, *event_prev; |
| 101 | Manager *manager; |
| 102 | struct udev *udev; |
| 103 | struct udev_device *dev; |
| 104 | struct udev_device *dev_kernel; |
| 105 | struct worker *worker; |
| 106 | enum event_state state; |
| 107 | unsigned long long int delaying_seqnum; |
| 108 | unsigned long long int seqnum; |
| 109 | const char *devpath; |
| 110 | size_t devpath_len; |
| 111 | const char *devpath_old; |
| 112 | dev_t devnum; |
| 113 | int ifindex; |
| 114 | bool_Bool is_block; |
| 115 | sd_event_source *timeout_warning; |
| 116 | sd_event_source *timeout; |
| 117 | }; |
| 118 | |
| 119 | static void event_queue_cleanup(Manager *manager, enum event_state type); |
| 120 | |
| 121 | enum worker_state { |
| 122 | WORKER_UNDEF, |
| 123 | WORKER_RUNNING, |
| 124 | WORKER_IDLE, |
| 125 | WORKER_KILLED, |
| 126 | }; |
| 127 | |
| 128 | struct worker { |
| 129 | Manager *manager; |
| 130 | int refcount; |
| 131 | pid_t pid; |
| 132 | struct udev_monitor *monitor; |
| 133 | enum worker_state state; |
| 134 | struct event *event; |
| 135 | }; |
| 136 | |
| 137 | /* passed from worker to main process */ |
| 138 | struct worker_message { |
| 139 | }; |
| 140 | |
| 141 | static void event_free(struct event *event) { |
| 142 | int r; |
| 143 | |
| 144 | if (!event) |
| 145 | return; |
| 146 | assert(event->manager)do { if ((__builtin_expect(!!(!(event->manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("event->manager"), "../src/udev/udevd.c" , 146, __PRETTY_FUNCTION__); } while (0); |
| 147 | |
| 148 | LIST_REMOVE(event, event->manager->events, event)do { typeof(*(event->manager->events)) **_head = &( event->manager->events), *_item = (event); do { if ((__builtin_expect (!!(!(_item)),0))) log_assert_failed_realm(LOG_REALM_UDEV, ("_item" ), "../src/udev/udevd.c", 148, __PRETTY_FUNCTION__); } while ( 0); if (_item->event_next) _item->event_next->event_prev = _item->event_prev; if (_item->event_prev) _item-> event_prev->event_next = _item->event_next; else { do { if ((__builtin_expect(!!(!(*_head == _item)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("*_head == _item"), "../src/udev/udevd.c", 148 , __PRETTY_FUNCTION__); } while (0); *_head = _item->event_next ; } _item->event_next = _item->event_prev = ((void*)0); } while (0); |
| 149 | udev_device_unref(event->dev); |
| 150 | udev_device_unref(event->dev_kernel); |
| 151 | |
| 152 | sd_event_source_unref(event->timeout_warning); |
| 153 | sd_event_source_unref(event->timeout); |
| 154 | |
| 155 | if (event->worker) |
| 156 | event->worker->event = NULL((void*)0); |
| 157 | |
| 158 | if (LIST_IS_EMPTY(event->manager->events)(!(event->manager->events))) { |
| 159 | /* only clean up the queue from the process that created it */ |
| 160 | if (event->manager->pid == getpid_cached()) { |
| 161 | r = unlink("/run/udev/queue"); |
| 162 | if (r < 0) |
| 163 | log_warning_errno(errno, "could not unlink /run/udev/queue: %m")({ int _level = ((4)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 163, __func__, "could not unlink /run/udev/queue: %m" ) : -abs(_e); }); |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | free(event); |
| 168 | } |
| 169 | |
| 170 | static void worker_free(struct worker *worker) { |
| 171 | if (!worker) |
| 172 | return; |
| 173 | |
| 174 | assert(worker->manager)do { if ((__builtin_expect(!!(!(worker->manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("worker->manager"), "../src/udev/udevd.c" , 174, __PRETTY_FUNCTION__); } while (0); |
| 175 | |
| 176 | hashmap_remove(worker->manager->workers, PID_TO_PTR(worker->pid)); |
| 177 | udev_monitor_unref(worker->monitor); |
| 178 | event_free(worker->event); |
| 179 | |
| 180 | free(worker); |
| 181 | } |
| 182 | |
| 183 | static void manager_workers_free(Manager *manager) { |
| 184 | struct worker *worker; |
| 185 | Iterator i; |
| 186 | |
| 187 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 187, __PRETTY_FUNCTION__ ); } while (0); |
| 188 | |
| 189 | HASHMAP_FOREACH(worker, manager->workers, i)for ((i) = ((Iterator) { .idx = ((2147483647 *2U +1U) - 1), . next_key = ((void*)0) }); hashmap_iterate((manager->workers ), &(i), (void**)&(worker), ((void*)0)); ) |
| 190 | worker_free(worker); |
| 191 | |
| 192 | manager->workers = hashmap_free(manager->workers); |
| 193 | } |
| 194 | |
| 195 | static int worker_new(struct worker **ret, Manager *manager, struct udev_monitor *worker_monitor, pid_t pid) { |
| 196 | _cleanup_free___attribute__((cleanup(freep))) struct worker *worker = NULL((void*)0); |
| 197 | int r; |
| 198 | |
| 199 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("ret"), "../src/udev/udevd.c", 199, __PRETTY_FUNCTION__ ); } while (0); |
| 200 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 200, __PRETTY_FUNCTION__ ); } while (0); |
| 201 | assert(worker_monitor)do { if ((__builtin_expect(!!(!(worker_monitor)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("worker_monitor"), "../src/udev/udevd.c", 201 , __PRETTY_FUNCTION__); } while (0); |
| 202 | assert(pid > 1)do { if ((__builtin_expect(!!(!(pid > 1)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("pid > 1"), "../src/udev/udevd.c", 202, __PRETTY_FUNCTION__ ); } while (0); |
| 203 | |
| 204 | worker = new0(struct worker, 1)((struct worker*) calloc((1), sizeof(struct worker))); |
| 205 | if (!worker) |
| 206 | return -ENOMEM12; |
| 207 | |
| 208 | worker->refcount = 1; |
| 209 | worker->manager = manager; |
| 210 | /* close monitor, but keep address around */ |
| 211 | udev_monitor_disconnect(worker_monitor); |
| 212 | worker->monitor = udev_monitor_ref(worker_monitor); |
| 213 | worker->pid = pid; |
| 214 | |
| 215 | r = hashmap_ensure_allocated(&manager->workers, NULL)internal_hashmap_ensure_allocated(&manager->workers, ( (void*)0) ); |
| 216 | if (r < 0) |
| 217 | return r; |
| 218 | |
| 219 | r = hashmap_put(manager->workers, PID_TO_PTR(pid), worker); |
| 220 | if (r < 0) |
| 221 | return r; |
| 222 | |
| 223 | *ret = TAKE_PTR(worker)({ typeof(worker) _ptr_ = (worker); (worker) = ((void*)0); _ptr_ ; }); |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static int on_event_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
| 229 | struct event *event = userdata; |
| 230 | |
| 231 | assert(event)do { if ((__builtin_expect(!!(!(event)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("event"), "../src/udev/udevd.c", 231, __PRETTY_FUNCTION__ ); } while (0); |
| 232 | assert(event->worker)do { if ((__builtin_expect(!!(!(event->worker)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("event->worker"), "../src/udev/udevd.c", 232, __PRETTY_FUNCTION__); } while (0); |
| 233 | |
| 234 | kill_and_sigcont(event->worker->pid, SIGKILL9); |
| 235 | event->worker->state = WORKER_KILLED; |
| 236 | |
| 237 | log_error("seq %llu '%s' killed", udev_device_get_seqnum(event->dev), event->devpath)({ int _level = (((3))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 237, __func__, "seq %llu '%s' killed" , udev_device_get_seqnum(event->dev), event->devpath) : -abs(_e); }); |
| 238 | |
| 239 | return 1; |
| 240 | } |
| 241 | |
| 242 | static int on_event_timeout_warning(sd_event_source *s, uint64_t usec, void *userdata) { |
| 243 | struct event *event = userdata; |
| 244 | |
| 245 | assert(event)do { if ((__builtin_expect(!!(!(event)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("event"), "../src/udev/udevd.c", 245, __PRETTY_FUNCTION__ ); } while (0); |
| 246 | |
| 247 | log_warning("seq %llu '%s' is taking a long time", udev_device_get_seqnum(event->dev), event->devpath)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 247, __func__, "seq %llu '%s' is taking a long time" , udev_device_get_seqnum(event->dev), event->devpath) : -abs(_e); }); |
| 248 | |
| 249 | return 1; |
| 250 | } |
| 251 | |
| 252 | static void worker_attach_event(struct worker *worker, struct event *event) { |
| 253 | sd_event *e; |
| 254 | uint64_t usec; |
| 255 | |
| 256 | assert(worker)do { if ((__builtin_expect(!!(!(worker)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("worker"), "../src/udev/udevd.c", 256, __PRETTY_FUNCTION__ ); } while (0); |
| 257 | assert(worker->manager)do { if ((__builtin_expect(!!(!(worker->manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("worker->manager"), "../src/udev/udevd.c" , 257, __PRETTY_FUNCTION__); } while (0); |
| 258 | assert(event)do { if ((__builtin_expect(!!(!(event)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("event"), "../src/udev/udevd.c", 258, __PRETTY_FUNCTION__ ); } while (0); |
| 259 | assert(!event->worker)do { if ((__builtin_expect(!!(!(!event->worker)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("!event->worker"), "../src/udev/udevd.c" , 259, __PRETTY_FUNCTION__); } while (0); |
| 260 | assert(!worker->event)do { if ((__builtin_expect(!!(!(!worker->event)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("!worker->event"), "../src/udev/udevd.c" , 260, __PRETTY_FUNCTION__); } while (0); |
| 261 | |
| 262 | worker->state = WORKER_RUNNING; |
| 263 | worker->event = event; |
| 264 | event->state = EVENT_RUNNING; |
| 265 | event->worker = worker; |
| 266 | |
| 267 | e = worker->manager->event; |
| 268 | |
| 269 | assert_se(sd_event_now(e, CLOCK_MONOTONIC, &usec) >= 0)do { if ((__builtin_expect(!!(!(sd_event_now(e, 1, &usec) >= 0)),0))) log_assert_failed_realm(LOG_REALM_UDEV, ("sd_event_now(e, CLOCK_MONOTONIC, &usec) >= 0" ), "../src/udev/udevd.c", 269, __PRETTY_FUNCTION__); } while ( 0); |
| 270 | |
| 271 | (void) sd_event_add_time(e, &event->timeout_warning, CLOCK_MONOTONIC1, |
| 272 | usec + arg_event_timeout_warn_usec, USEC_PER_SEC((usec_t) 1000000ULL), on_event_timeout_warning, event); |
| 273 | |
| 274 | (void) sd_event_add_time(e, &event->timeout, CLOCK_MONOTONIC1, |
| 275 | usec + arg_event_timeout_usec, USEC_PER_SEC((usec_t) 1000000ULL), on_event_timeout, event); |
| 276 | } |
| 277 | |
| 278 | static void manager_free(Manager *manager) { |
| 279 | if (!manager) |
| 280 | return; |
| 281 | |
| 282 | udev_builtin_exit(manager->udev); |
| 283 | |
| 284 | sd_event_source_unref(manager->ctrl_event); |
| 285 | sd_event_source_unref(manager->uevent_event); |
| 286 | sd_event_source_unref(manager->inotify_event); |
| 287 | |
| 288 | udev_unref(manager->udev); |
| 289 | sd_event_unref(manager->event); |
| 290 | manager_workers_free(manager); |
| 291 | event_queue_cleanup(manager, EVENT_UNDEF); |
| 292 | |
| 293 | udev_monitor_unref(manager->monitor); |
| 294 | udev_ctrl_unref(manager->ctrl); |
| 295 | udev_ctrl_connection_unref(manager->ctrl_conn_blocking); |
| 296 | |
| 297 | udev_list_cleanup(&manager->properties); |
| 298 | udev_rules_unref(manager->rules); |
| 299 | |
| 300 | safe_close(manager->fd_inotify); |
| 301 | safe_close_pair(manager->worker_watch); |
| 302 | |
| 303 | free(manager); |
| 304 | } |
| 305 | |
| 306 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free)static inline void manager_freep(Manager* *p) { if (*p) manager_free (*p); }; |
| 307 | |
| 308 | static int worker_send_message(int fd) { |
| 309 | struct worker_message message = {}; |
| 310 | |
| 311 | return loop_write(fd, &message, sizeof(message), false0); |
| 312 | } |
| 313 | |
| 314 | static bool_Bool shall_lock_device(struct udev_device *dev) { |
| 315 | const char *sysname; |
| 316 | |
| 317 | if (!streq_ptr("block", udev_device_get_subsystem(dev))) |
| 318 | return false0; |
| 319 | |
| 320 | sysname = udev_device_get_sysname(dev); |
| 321 | return !startswith(sysname, "dm-") && |
| 322 | !startswith(sysname, "md") && |
| 323 | !startswith(sysname, "drbd"); |
| 324 | } |
| 325 | |
| 326 | static void worker_spawn(Manager *manager, struct event *event) { |
| 327 | struct udev *udev = event->udev; |
| 328 | _cleanup_(udev_monitor_unrefp)__attribute__((cleanup(udev_monitor_unrefp))) struct udev_monitor *worker_monitor = NULL((void*)0); |
| 329 | pid_t pid; |
| 330 | int r = 0; |
| 331 | |
| 332 | /* listen for new events */ |
| 333 | worker_monitor = udev_monitor_new_from_netlink(udev, NULL((void*)0)); |
| 334 | if (worker_monitor == NULL((void*)0)) |
| 335 | return; |
| 336 | /* allow the main daemon netlink address to send devices to the worker */ |
| 337 | udev_monitor_allow_unicast_sender(worker_monitor, manager->monitor); |
| 338 | r = udev_monitor_enable_receiving(worker_monitor); |
| 339 | if (r < 0) |
| 340 | log_error_errno(r, "worker: could not enable receiving of device: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 340, __func__, "worker: could not enable receiving of device: %m" ) : -abs(_e); }); |
| 341 | |
| 342 | pid = fork(); |
| 343 | switch (pid) { |
| 344 | case 0: { |
| 345 | struct udev_device *dev = NULL((void*)0); |
| 346 | _cleanup_(sd_netlink_unrefp)__attribute__((cleanup(sd_netlink_unrefp))) sd_netlink *rtnl = NULL((void*)0); |
| 347 | int fd_monitor; |
| 348 | _cleanup_close___attribute__((cleanup(closep))) int fd_signal = -1, fd_ep = -1; |
| 349 | struct epoll_event ep_signal = { .events = EPOLLINEPOLLIN }; |
| 350 | struct epoll_event ep_monitor = { .events = EPOLLINEPOLLIN }; |
| 351 | sigset_t mask; |
| 352 | |
| 353 | /* take initial device from queue */ |
| 354 | dev = TAKE_PTR(event->dev)({ typeof(event->dev) _ptr_ = (event->dev); (event-> dev) = ((void*)0); _ptr_; }); |
| 355 | |
| 356 | unsetenv("NOTIFY_SOCKET"); |
| 357 | |
| 358 | manager_workers_free(manager); |
| 359 | event_queue_cleanup(manager, EVENT_UNDEF); |
| 360 | |
| 361 | manager->monitor = udev_monitor_unref(manager->monitor); |
| 362 | manager->ctrl_conn_blocking = udev_ctrl_connection_unref(manager->ctrl_conn_blocking); |
| 363 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
| 364 | manager->worker_watch[READ_END0] = safe_close(manager->worker_watch[READ_END0]); |
| 365 | |
| 366 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); |
| 367 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); |
| 368 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
| 369 | |
| 370 | manager->event = sd_event_unref(manager->event); |
| 371 | |
| 372 | sigfillset(&mask); |
| 373 | fd_signal = signalfd(-1, &mask, SFD_NONBLOCKSFD_NONBLOCK|SFD_CLOEXECSFD_CLOEXEC); |
| 374 | if (fd_signal < 0) { |
| 375 | r = log_error_errno(errno, "error creating signalfd %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 375, __func__, "error creating signalfd %m" ) : -abs(_e); }); |
| 376 | goto out; |
| 377 | } |
| 378 | ep_signal.data.fd = fd_signal; |
| 379 | |
| 380 | fd_monitor = udev_monitor_get_fd(worker_monitor); |
| 381 | ep_monitor.data.fd = fd_monitor; |
| 382 | |
| 383 | fd_ep = epoll_create1(EPOLL_CLOEXECEPOLL_CLOEXEC); |
| 384 | if (fd_ep < 0) { |
| 385 | r = log_error_errno(errno, "error creating epoll fd: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 385, __func__, "error creating epoll fd: %m" ) : -abs(_e); }); |
| 386 | goto out; |
| 387 | } |
| 388 | |
| 389 | if (epoll_ctl(fd_ep, EPOLL_CTL_ADD1, fd_signal, &ep_signal) < 0 || |
| 390 | epoll_ctl(fd_ep, EPOLL_CTL_ADD1, fd_monitor, &ep_monitor) < 0) { |
| 391 | r = log_error_errno(errno, "fail to add fds to epoll: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 391, __func__, "fail to add fds to epoll: %m" ) : -abs(_e); }); |
| 392 | goto out; |
| 393 | } |
| 394 | |
| 395 | /* Request TERM signal if parent exits. |
| 396 | Ignore error, not much we can do in that case. */ |
| 397 | (void) prctl(PR_SET_PDEATHSIG1, SIGTERM15); |
| 398 | |
| 399 | /* Reset OOM score, we only protect the main daemon. */ |
| 400 | write_string_file("/proc/self/oom_score_adj", "0", 0); |
| 401 | |
| 402 | for (;;) { |
| 403 | struct udev_event *udev_event; |
| 404 | int fd_lock = -1; |
| 405 | |
| 406 | assert(dev)do { if ((__builtin_expect(!!(!(dev)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("dev"), "../src/udev/udevd.c", 406, __PRETTY_FUNCTION__ ); } while (0); |
| 407 | |
| 408 | log_debug("seq %llu running", udev_device_get_seqnum(dev))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 408, __func__, "seq %llu running", udev_device_get_seqnum (dev)) : -abs(_e); }); |
| 409 | udev_event = udev_event_new(dev); |
| 410 | if (udev_event == NULL((void*)0)) { |
| 411 | r = -ENOMEM12; |
| 412 | goto out; |
| 413 | } |
| 414 | |
| 415 | if (arg_exec_delay > 0) |
| 416 | udev_event->exec_delay = arg_exec_delay; |
| 417 | |
| 418 | /* |
| 419 | * Take a shared lock on the device node; this establishes |
| 420 | * a concept of device "ownership" to serialize device |
| 421 | * access. External processes holding an exclusive lock will |
| 422 | * cause udev to skip the event handling; in the case udev |
| 423 | * acquired the lock, the external process can block until |
| 424 | * udev has finished its event handling. |
| 425 | */ |
| 426 | if (!streq_ptr(udev_device_get_action(dev), "remove") && |
| 427 | shall_lock_device(dev)) { |
| 428 | struct udev_device *d = dev; |
| 429 | |
| 430 | if (streq_ptr("partition", udev_device_get_devtype(d))) |
| 431 | d = udev_device_get_parent(d); |
| 432 | |
| 433 | if (d) { |
| 434 | fd_lock = open(udev_device_get_devnode(d), O_RDONLY00|O_CLOEXEC02000000|O_NOFOLLOW0400000|O_NONBLOCK04000); |
| 435 | if (fd_lock >= 0 && flock(fd_lock, LOCK_SH1|LOCK_NB4) < 0) { |
| 436 | log_debug_errno(errno, "Unable to flock(%s), skipping event handling: %m", udev_device_get_devnode(d))({ int _level = ((7)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 436, __func__, "Unable to flock(%s), skipping event handling: %m" , udev_device_get_devnode(d)) : -abs(_e); }); |
| 437 | fd_lock = safe_close(fd_lock); |
Value stored to 'fd_lock' is never read | |
| 438 | goto skip; |
| 439 | } |
| 440 | } |
| 441 | } |
| 442 | |
| 443 | /* needed for renaming netifs */ |
| 444 | udev_event->rtnl = rtnl; |
| 445 | |
| 446 | /* apply rules, create node, symlinks */ |
| 447 | udev_event_execute_rules(udev_event, |
| 448 | arg_event_timeout_usec, arg_event_timeout_warn_usec, |
| 449 | &manager->properties, |
| 450 | manager->rules); |
| 451 | |
| 452 | udev_event_execute_run(udev_event, |
| 453 | arg_event_timeout_usec, arg_event_timeout_warn_usec); |
| 454 | |
| 455 | if (udev_event->rtnl) |
| 456 | /* in case rtnl was initialized */ |
| 457 | rtnl = sd_netlink_ref(udev_event->rtnl); |
| 458 | |
| 459 | /* apply/restore inotify watch */ |
| 460 | if (udev_event->inotify_watch) { |
| 461 | udev_watch_begin(udev, dev); |
| 462 | udev_device_update_db(dev); |
| 463 | } |
| 464 | |
| 465 | safe_close(fd_lock); |
| 466 | |
| 467 | /* send processed event back to libudev listeners */ |
| 468 | udev_monitor_send_device(worker_monitor, NULL((void*)0), dev); |
| 469 | |
| 470 | skip: |
| 471 | log_debug("seq %llu processed", udev_device_get_seqnum(dev))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 471, __func__, "seq %llu processed", udev_device_get_seqnum(dev)) : -abs(_e); }); |
| 472 | |
| 473 | /* send udevd the result of the event execution */ |
| 474 | r = worker_send_message(manager->worker_watch[WRITE_END1]); |
| 475 | if (r < 0) |
| 476 | log_error_errno(r, "failed to send result of seq %llu to main daemon: %m",({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 477, __func__, "failed to send result of seq %llu to main daemon: %m" , udev_device_get_seqnum(dev)) : -abs(_e); }) |
| 477 | udev_device_get_seqnum(dev))({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 477, __func__, "failed to send result of seq %llu to main daemon: %m" , udev_device_get_seqnum(dev)) : -abs(_e); }); |
| 478 | |
| 479 | udev_device_unref(dev); |
| 480 | dev = NULL((void*)0); |
| 481 | |
| 482 | udev_event_unref(udev_event); |
| 483 | |
| 484 | /* wait for more device messages from main udevd, or term signal */ |
| 485 | while (dev == NULL((void*)0)) { |
| 486 | struct epoll_event ev[4]; |
| 487 | int fdcount; |
| 488 | int i; |
| 489 | |
| 490 | fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev)__extension__ (__builtin_choose_expr( !__builtin_types_compatible_p (typeof(ev), typeof(&*(ev))), sizeof(ev)/sizeof((ev)[0]), ((void)0))), -1); |
| 491 | if (fdcount < 0) { |
| 492 | if (errno(*__errno_location ()) == EINTR4) |
| 493 | continue; |
| 494 | r = log_error_errno(errno, "failed to poll: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 494, __func__, "failed to poll: %m" ) : -abs(_e); }); |
| 495 | goto out; |
| 496 | } |
| 497 | |
| 498 | for (i = 0; i < fdcount; i++) { |
| 499 | if (ev[i].data.fd == fd_monitor && ev[i].events & EPOLLINEPOLLIN) { |
| 500 | dev = udev_monitor_receive_device(worker_monitor); |
| 501 | break; |
| 502 | } else if (ev[i].data.fd == fd_signal && ev[i].events & EPOLLINEPOLLIN) { |
| 503 | struct signalfd_siginfo fdsi; |
| 504 | ssize_t size; |
| 505 | |
| 506 | size = read(fd_signal, &fdsi, sizeof(struct signalfd_siginfo)); |
| 507 | if (size != sizeof(struct signalfd_siginfo)) |
| 508 | continue; |
| 509 | switch (fdsi.ssi_signo) { |
| 510 | case SIGTERM15: |
| 511 | goto out; |
| 512 | } |
| 513 | } |
| 514 | } |
| 515 | } |
| 516 | } |
| 517 | out: |
| 518 | udev_device_unref(dev); |
| 519 | manager_free(manager); |
| 520 | log_close(); |
| 521 | _exit(r < 0 ? EXIT_FAILURE1 : EXIT_SUCCESS0); |
| 522 | } |
| 523 | case -1: |
| 524 | event->state = EVENT_QUEUED; |
| 525 | log_error_errno(errno, "fork of child failed: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 525, __func__, "fork of child failed: %m" ) : -abs(_e); }); |
| 526 | break; |
| 527 | default: |
| 528 | { |
| 529 | struct worker *worker; |
| 530 | |
| 531 | r = worker_new(&worker, manager, worker_monitor, pid); |
| 532 | if (r < 0) |
| 533 | return; |
| 534 | |
| 535 | worker_attach_event(worker, event); |
| 536 | |
| 537 | log_debug("seq %llu forked new worker ["PID_FMT"]", udev_device_get_seqnum(event->dev), pid)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 537, __func__, "seq %llu forked new worker [" "%" "i""]", udev_device_get_seqnum(event->dev), pid) : -abs (_e); }); |
| 538 | break; |
| 539 | } |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | static void event_run(Manager *manager, struct event *event) { |
| 544 | struct worker *worker; |
| 545 | Iterator i; |
| 546 | |
| 547 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 547, __PRETTY_FUNCTION__ ); } while (0); |
| 548 | assert(event)do { if ((__builtin_expect(!!(!(event)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("event"), "../src/udev/udevd.c", 548, __PRETTY_FUNCTION__ ); } while (0); |
| 549 | |
| 550 | HASHMAP_FOREACH(worker, manager->workers, i)for ((i) = ((Iterator) { .idx = ((2147483647 *2U +1U) - 1), . next_key = ((void*)0) }); hashmap_iterate((manager->workers ), &(i), (void**)&(worker), ((void*)0)); ) { |
| 551 | ssize_t count; |
| 552 | |
| 553 | if (worker->state != WORKER_IDLE) |
| 554 | continue; |
| 555 | |
| 556 | count = udev_monitor_send_device(manager->monitor, worker->monitor, event->dev); |
| 557 | if (count < 0) { |
| 558 | log_error_errno(errno, "worker ["PID_FMT"] did not accept message %zi (%m), kill it",({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 559, __func__, "worker [" "%" "i""] did not accept message %zi (%m), kill it", worker-> pid, count) : -abs(_e); }) |
| 559 | worker->pid, count)({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 559, __func__, "worker [" "%" "i""] did not accept message %zi (%m), kill it", worker-> pid, count) : -abs(_e); }); |
| 560 | kill(worker->pid, SIGKILL9); |
| 561 | worker->state = WORKER_KILLED; |
| 562 | continue; |
| 563 | } |
| 564 | worker_attach_event(worker, event); |
| 565 | return; |
| 566 | } |
| 567 | |
| 568 | if (hashmap_size(manager->workers) >= arg_children_max) { |
| 569 | if (arg_children_max > 1) |
| 570 | log_debug("maximum number (%i) of children reached", hashmap_size(manager->workers))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 570, __func__, "maximum number (%i) of children reached" , hashmap_size(manager->workers)) : -abs(_e); }); |
| 571 | return; |
| 572 | } |
| 573 | |
| 574 | /* start new worker and pass initial device */ |
| 575 | worker_spawn(manager, event); |
| 576 | } |
| 577 | |
| 578 | static int event_queue_insert(Manager *manager, struct udev_device *dev) { |
| 579 | struct event *event; |
| 580 | int r; |
| 581 | |
| 582 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 582, __PRETTY_FUNCTION__ ); } while (0); |
| 583 | assert(dev)do { if ((__builtin_expect(!!(!(dev)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("dev"), "../src/udev/udevd.c", 583, __PRETTY_FUNCTION__ ); } while (0); |
| 584 | |
| 585 | /* only one process can add events to the queue */ |
| 586 | if (manager->pid == 0) |
| 587 | manager->pid = getpid_cached(); |
| 588 | |
| 589 | assert(manager->pid == getpid_cached())do { if ((__builtin_expect(!!(!(manager->pid == getpid_cached ())),0))) log_assert_failed_realm(LOG_REALM_UDEV, ("manager->pid == getpid_cached()" ), "../src/udev/udevd.c", 589, __PRETTY_FUNCTION__); } while ( 0); |
| 590 | |
| 591 | event = new0(struct event, 1)((struct event*) calloc((1), sizeof(struct event))); |
| 592 | if (!event) |
| 593 | return -ENOMEM12; |
| 594 | |
| 595 | event->udev = udev_device_get_udev(dev); |
| 596 | event->manager = manager; |
| 597 | event->dev = dev; |
| 598 | event->dev_kernel = udev_device_shallow_clone(dev); |
| 599 | udev_device_copy_properties(event->dev_kernel, dev); |
| 600 | event->seqnum = udev_device_get_seqnum(dev); |
| 601 | event->devpath = udev_device_get_devpath(dev); |
| 602 | event->devpath_len = strlen(event->devpath); |
| 603 | event->devpath_old = udev_device_get_devpath_old(dev); |
| 604 | event->devnum = udev_device_get_devnum(dev); |
| 605 | event->is_block = streq("block", udev_device_get_subsystem(dev))(strcmp(("block"),(udev_device_get_subsystem(dev))) == 0); |
| 606 | event->ifindex = udev_device_get_ifindex(dev); |
| 607 | |
| 608 | log_debug("seq %llu queued, '%s' '%s'", udev_device_get_seqnum(dev),({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 609, __func__, "seq %llu queued, '%s' '%s'" , udev_device_get_seqnum(dev), udev_device_get_action(dev), udev_device_get_subsystem (dev)) : -abs(_e); }) |
| 609 | udev_device_get_action(dev), udev_device_get_subsystem(dev))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 609, __func__, "seq %llu queued, '%s' '%s'" , udev_device_get_seqnum(dev), udev_device_get_action(dev), udev_device_get_subsystem (dev)) : -abs(_e); }); |
| 610 | |
| 611 | event->state = EVENT_QUEUED; |
| 612 | |
| 613 | if (LIST_IS_EMPTY(manager->events)(!(manager->events))) { |
| 614 | r = touch("/run/udev/queue"); |
| 615 | if (r < 0) |
| 616 | log_warning_errno(r, "could not touch /run/udev/queue: %m")({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 616, __func__, "could not touch /run/udev/queue: %m" ) : -abs(_e); }); |
| 617 | } |
| 618 | |
| 619 | LIST_APPEND(event, manager->events, event)do { typeof(*(manager->events)) *_tail; do { typeof(*(manager ->events)) *_item = (manager->events); if (!_item) (_tail ) = ((void*)0); else { while (_item->event_next) _item = _item ->event_next; (_tail) = _item; } } while (0); do { typeof( *(manager->events)) **_head = &(manager->events), * _a = (_tail), *_b = (event); do { if ((__builtin_expect(!!(!( _b)),0))) log_assert_failed_realm(LOG_REALM_UDEV, ("_b"), "../src/udev/udevd.c" , 619, __PRETTY_FUNCTION__); } while (0); if (!_a) { if ((_b-> event_next = *_head)) _b->event_next->event_prev = _b; _b ->event_prev = ((void*)0); *_head = _b; } else { if ((_b-> event_next = _a->event_next)) _b->event_next->event_prev = _b; _b->event_prev = _a; _a->event_next = _b; } } while (0); } while (0); |
| 620 | |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | static void manager_kill_workers(Manager *manager) { |
| 625 | struct worker *worker; |
| 626 | Iterator i; |
| 627 | |
| 628 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 628, __PRETTY_FUNCTION__ ); } while (0); |
| 629 | |
| 630 | HASHMAP_FOREACH(worker, manager->workers, i)for ((i) = ((Iterator) { .idx = ((2147483647 *2U +1U) - 1), . next_key = ((void*)0) }); hashmap_iterate((manager->workers ), &(i), (void**)&(worker), ((void*)0)); ) { |
| 631 | if (worker->state == WORKER_KILLED) |
| 632 | continue; |
| 633 | |
| 634 | worker->state = WORKER_KILLED; |
| 635 | kill(worker->pid, SIGTERM15); |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | /* lookup event for identical, parent, child device */ |
| 640 | static bool_Bool is_devpath_busy(Manager *manager, struct event *event) { |
| 641 | struct event *loop_event; |
| 642 | size_t common; |
| 643 | |
| 644 | /* check if queue contains events we depend on */ |
| 645 | LIST_FOREACH(event, loop_event, manager->events)for ((loop_event) = (manager->events); (loop_event); (loop_event ) = (loop_event)->event_next) { |
| 646 | /* we already found a later event, earlier cannot block us, no need to check again */ |
| 647 | if (loop_event->seqnum < event->delaying_seqnum) |
| 648 | continue; |
| 649 | |
| 650 | /* event we checked earlier still exists, no need to check again */ |
| 651 | if (loop_event->seqnum == event->delaying_seqnum) |
| 652 | return true1; |
| 653 | |
| 654 | /* found ourself, no later event can block us */ |
| 655 | if (loop_event->seqnum >= event->seqnum) |
| 656 | break; |
| 657 | |
| 658 | /* check major/minor */ |
| 659 | if (major(event->devnum)gnu_dev_major (event->devnum) != 0 && event->devnum == loop_event->devnum && event->is_block == loop_event->is_block) |
| 660 | return true1; |
| 661 | |
| 662 | /* check network device ifindex */ |
| 663 | if (event->ifindex != 0 && event->ifindex == loop_event->ifindex) |
| 664 | return true1; |
| 665 | |
| 666 | /* check our old name */ |
| 667 | if (event->devpath_old != NULL((void*)0) && streq(loop_event->devpath, event->devpath_old)(strcmp((loop_event->devpath),(event->devpath_old)) == 0 )) { |
| 668 | event->delaying_seqnum = loop_event->seqnum; |
| 669 | return true1; |
| 670 | } |
| 671 | |
| 672 | /* compare devpath */ |
| 673 | common = MIN(loop_event->devpath_len, event->devpath_len)__extension__ ({ const typeof((loop_event->devpath_len)) __unique_prefix_A23 = ((loop_event->devpath_len)); const typeof((event->devpath_len )) __unique_prefix_B24 = ((event->devpath_len)); __unique_prefix_A23 < __unique_prefix_B24 ? __unique_prefix_A23 : __unique_prefix_B24 ; }); |
| 674 | |
| 675 | /* one devpath is contained in the other? */ |
| 676 | if (memcmp(loop_event->devpath, event->devpath, common) != 0) |
| 677 | continue; |
| 678 | |
| 679 | /* identical device event found */ |
| 680 | if (loop_event->devpath_len == event->devpath_len) { |
| 681 | /* devices names might have changed/swapped in the meantime */ |
| 682 | if (major(event->devnum)gnu_dev_major (event->devnum) != 0 && (event->devnum != loop_event->devnum || event->is_block != loop_event->is_block)) |
| 683 | continue; |
| 684 | if (event->ifindex != 0 && event->ifindex != loop_event->ifindex) |
| 685 | continue; |
| 686 | event->delaying_seqnum = loop_event->seqnum; |
| 687 | return true1; |
| 688 | } |
| 689 | |
| 690 | /* parent device event found */ |
| 691 | if (event->devpath[common] == '/') { |
| 692 | event->delaying_seqnum = loop_event->seqnum; |
| 693 | return true1; |
| 694 | } |
| 695 | |
| 696 | /* child device event found */ |
| 697 | if (loop_event->devpath[common] == '/') { |
| 698 | event->delaying_seqnum = loop_event->seqnum; |
| 699 | return true1; |
| 700 | } |
| 701 | |
| 702 | /* no matching device */ |
| 703 | continue; |
| 704 | } |
| 705 | |
| 706 | return false0; |
| 707 | } |
| 708 | |
| 709 | static int on_exit_timeout(sd_event_source *s, uint64_t usec, void *userdata) { |
| 710 | Manager *manager = userdata; |
| 711 | |
| 712 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 712, __PRETTY_FUNCTION__ ); } while (0); |
| 713 | |
| 714 | log_error_errno(ETIMEDOUT, "giving up waiting for workers to finish")({ int _level = ((3)), _e = ((110)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 714, __func__, "giving up waiting for workers to finish" ) : -abs(_e); }); |
| 715 | |
| 716 | sd_event_exit(manager->event, -ETIMEDOUT110); |
| 717 | |
| 718 | return 1; |
| 719 | } |
| 720 | |
| 721 | static void manager_exit(Manager *manager) { |
| 722 | uint64_t usec; |
| 723 | int r; |
| 724 | |
| 725 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 725, __PRETTY_FUNCTION__ ); } while (0); |
| 726 | |
| 727 | manager->exit = true1; |
| 728 | |
| 729 | sd_notify(false0, |
| 730 | "STOPPING=1\n" |
| 731 | "STATUS=Starting shutdown..."); |
| 732 | |
| 733 | /* close sources of new events and discard buffered events */ |
| 734 | manager->ctrl_event = sd_event_source_unref(manager->ctrl_event); |
| 735 | manager->ctrl = udev_ctrl_unref(manager->ctrl); |
| 736 | |
| 737 | manager->inotify_event = sd_event_source_unref(manager->inotify_event); |
| 738 | manager->fd_inotify = safe_close(manager->fd_inotify); |
| 739 | |
| 740 | manager->uevent_event = sd_event_source_unref(manager->uevent_event); |
| 741 | manager->monitor = udev_monitor_unref(manager->monitor); |
| 742 | |
| 743 | /* discard queued events and kill workers */ |
| 744 | event_queue_cleanup(manager, EVENT_QUEUED); |
| 745 | manager_kill_workers(manager); |
| 746 | |
| 747 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0)do { if ((__builtin_expect(!!(!(sd_event_now(manager->event , 1, &usec) >= 0)),0))) log_assert_failed_realm(LOG_REALM_UDEV , ("sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0" ), "../src/udev/udevd.c", 747, __PRETTY_FUNCTION__); } while ( 0); |
| 748 | |
| 749 | r = sd_event_add_time(manager->event, NULL((void*)0), CLOCK_MONOTONIC1, |
| 750 | usec + 30 * USEC_PER_SEC((usec_t) 1000000ULL), USEC_PER_SEC((usec_t) 1000000ULL), on_exit_timeout, manager); |
| 751 | if (r < 0) |
| 752 | return; |
| 753 | } |
| 754 | |
| 755 | /* reload requested, HUP signal received, rules changed, builtin changed */ |
| 756 | static void manager_reload(Manager *manager) { |
| 757 | |
| 758 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 758, __PRETTY_FUNCTION__ ); } while (0); |
| 759 | |
| 760 | sd_notify(false0, |
| 761 | "RELOADING=1\n" |
| 762 | "STATUS=Flushing configuration..."); |
| 763 | |
| 764 | manager_kill_workers(manager); |
| 765 | manager->rules = udev_rules_unref(manager->rules); |
| 766 | udev_builtin_exit(manager->udev); |
| 767 | |
| 768 | sd_notifyf(false0, |
| 769 | "READY=1\n" |
| 770 | "STATUS=Processing with %u children at max", arg_children_max); |
| 771 | } |
| 772 | |
| 773 | static void event_queue_start(Manager *manager) { |
| 774 | struct event *event; |
| 775 | usec_t usec; |
| 776 | |
| 777 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 777, __PRETTY_FUNCTION__ ); } while (0); |
| 778 | |
| 779 | if (LIST_IS_EMPTY(manager->events)(!(manager->events)) || |
| 780 | manager->exit || manager->stop_exec_queue) |
| 781 | return; |
| 782 | |
| 783 | assert_se(sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0)do { if ((__builtin_expect(!!(!(sd_event_now(manager->event , 1, &usec) >= 0)),0))) log_assert_failed_realm(LOG_REALM_UDEV , ("sd_event_now(manager->event, CLOCK_MONOTONIC, &usec) >= 0" ), "../src/udev/udevd.c", 783, __PRETTY_FUNCTION__); } while ( 0); |
| 784 | /* check for changed config, every 3 seconds at most */ |
| 785 | if (manager->last_usec == 0 || |
| 786 | (usec - manager->last_usec) > 3 * USEC_PER_SEC((usec_t) 1000000ULL)) { |
| 787 | if (udev_rules_check_timestamp(manager->rules) || |
| 788 | udev_builtin_validate(manager->udev)) |
| 789 | manager_reload(manager); |
| 790 | |
| 791 | manager->last_usec = usec; |
| 792 | } |
| 793 | |
| 794 | udev_builtin_init(manager->udev); |
| 795 | |
| 796 | if (!manager->rules) { |
| 797 | manager->rules = udev_rules_new(manager->udev, arg_resolve_names); |
| 798 | if (!manager->rules) |
| 799 | return; |
| 800 | } |
| 801 | |
| 802 | LIST_FOREACH(event,event,manager->events)for ((event) = (manager->events); (event); (event) = (event )->event_next) { |
| 803 | if (event->state != EVENT_QUEUED) |
| 804 | continue; |
| 805 | |
| 806 | /* do not start event if parent or child event is still running */ |
| 807 | if (is_devpath_busy(manager, event)) |
| 808 | continue; |
| 809 | |
| 810 | event_run(manager, event); |
| 811 | } |
| 812 | } |
| 813 | |
| 814 | static void event_queue_cleanup(Manager *manager, enum event_state match_type) { |
| 815 | struct event *event, *tmp; |
| 816 | |
| 817 | LIST_FOREACH_SAFE(event, event, tmp, manager->events)for ((event) = (manager->events); (event) && (((tmp ) = (event)->event_next), 1); (event) = (tmp)) { |
| 818 | if (match_type != EVENT_UNDEF && match_type != event->state) |
| 819 | continue; |
| 820 | |
| 821 | event_free(event); |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | static int on_worker(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| 826 | Manager *manager = userdata; |
| 827 | |
| 828 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 828, __PRETTY_FUNCTION__ ); } while (0); |
| 829 | |
| 830 | for (;;) { |
| 831 | struct worker_message msg; |
| 832 | struct iovec iovec = { |
| 833 | .iov_base = &msg, |
| 834 | .iov_len = sizeof(msg), |
| 835 | }; |
| 836 | union { |
| 837 | struct cmsghdr cmsghdr; |
| 838 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred))((((sizeof(struct ucred)) + sizeof (size_t) - 1) & (size_t ) ~(sizeof (size_t) - 1)) + (((sizeof (struct cmsghdr)) + sizeof (size_t) - 1) & (size_t) ~(sizeof (size_t) - 1)))]; |
| 839 | } control = {}; |
| 840 | struct msghdr msghdr = { |
| 841 | .msg_iov = &iovec, |
| 842 | .msg_iovlen = 1, |
| 843 | .msg_control = &control, |
| 844 | .msg_controllen = sizeof(control), |
| 845 | }; |
| 846 | struct cmsghdr *cmsg; |
| 847 | ssize_t size; |
| 848 | struct ucred *ucred = NULL((void*)0); |
| 849 | struct worker *worker; |
| 850 | |
| 851 | size = recvmsg(fd, &msghdr, MSG_DONTWAITMSG_DONTWAIT); |
| 852 | if (size < 0) { |
| 853 | if (errno(*__errno_location ()) == EINTR4) |
| 854 | continue; |
| 855 | else if (errno(*__errno_location ()) == EAGAIN11) |
| 856 | /* nothing more to read */ |
| 857 | break; |
| 858 | |
| 859 | return log_error_errno(errno, "failed to receive message: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 859, __func__, "failed to receive message: %m" ) : -abs(_e); }); |
| 860 | } else if (size != sizeof(struct worker_message)) { |
| 861 | log_warning_errno(EIO, "ignoring worker message with invalid size %zi bytes", size)({ int _level = ((4)), _e = ((5)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 861, __func__, "ignoring worker message with invalid size %zi bytes" , size) : -abs(_e); }); |
| 862 | continue; |
| 863 | } |
| 864 | |
| 865 | CMSG_FOREACH(cmsg, &msghdr)for ((cmsg) = ((size_t) (&msghdr)->msg_controllen >= sizeof (struct cmsghdr) ? (struct cmsghdr *) (&msghdr)-> msg_control : (struct cmsghdr *) 0); (cmsg); (cmsg) = __cmsg_nxthdr ((&msghdr), (cmsg))) { |
| 866 | if (cmsg->cmsg_level == SOL_SOCKET1 && |
| 867 | cmsg->cmsg_type == SCM_CREDENTIALSSCM_CREDENTIALS && |
| 868 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))((((sizeof (struct cmsghdr)) + sizeof (size_t) - 1) & (size_t ) ~(sizeof (size_t) - 1)) + (sizeof(struct ucred)))) |
| 869 | ucred = (struct ucred*) CMSG_DATA(cmsg)((cmsg)->__cmsg_data); |
| 870 | } |
| 871 | |
| 872 | if (!ucred || ucred->pid <= 0) { |
| 873 | log_warning_errno(EIO, "ignoring worker message without valid PID")({ int _level = ((4)), _e = ((5)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 873, __func__, "ignoring worker message without valid PID" ) : -abs(_e); }); |
| 874 | continue; |
| 875 | } |
| 876 | |
| 877 | /* lookup worker who sent the signal */ |
| 878 | worker = hashmap_get(manager->workers, PID_TO_PTR(ucred->pid)); |
| 879 | if (!worker) { |
| 880 | log_debug("worker ["PID_FMT"] returned, but is no longer tracked", ucred->pid)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 880, __func__, "worker [""%" "i""] returned, but is no longer tracked" , ucred->pid) : -abs(_e); }); |
| 881 | continue; |
| 882 | } |
| 883 | |
| 884 | if (worker->state != WORKER_KILLED) |
| 885 | worker->state = WORKER_IDLE; |
| 886 | |
| 887 | /* worker returned */ |
| 888 | event_free(worker->event); |
| 889 | } |
| 890 | |
| 891 | /* we have free workers, try to schedule events */ |
| 892 | event_queue_start(manager); |
| 893 | |
| 894 | return 1; |
| 895 | } |
| 896 | |
| 897 | static int on_uevent(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| 898 | Manager *manager = userdata; |
| 899 | struct udev_device *dev; |
| 900 | int r; |
| 901 | |
| 902 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 902, __PRETTY_FUNCTION__ ); } while (0); |
| 903 | |
| 904 | dev = udev_monitor_receive_device(manager->monitor); |
| 905 | if (dev) { |
| 906 | udev_device_ensure_usec_initialized(dev, NULL((void*)0)); |
| 907 | r = event_queue_insert(manager, dev); |
| 908 | if (r < 0) |
| 909 | udev_device_unref(dev); |
| 910 | else |
| 911 | /* we have fresh events, try to schedule them */ |
| 912 | event_queue_start(manager); |
| 913 | } |
| 914 | |
| 915 | return 1; |
| 916 | } |
| 917 | |
| 918 | /* receive the udevd message from userspace */ |
| 919 | static int on_ctrl_msg(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| 920 | Manager *manager = userdata; |
| 921 | _cleanup_(udev_ctrl_connection_unrefp)__attribute__((cleanup(udev_ctrl_connection_unrefp))) struct udev_ctrl_connection *ctrl_conn = NULL((void*)0); |
| 922 | _cleanup_(udev_ctrl_msg_unrefp)__attribute__((cleanup(udev_ctrl_msg_unrefp))) struct udev_ctrl_msg *ctrl_msg = NULL((void*)0); |
| 923 | const char *str; |
| 924 | int i; |
| 925 | |
| 926 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 926, __PRETTY_FUNCTION__ ); } while (0); |
| 927 | |
| 928 | ctrl_conn = udev_ctrl_get_connection(manager->ctrl); |
| 929 | if (!ctrl_conn) |
| 930 | return 1; |
| 931 | |
| 932 | ctrl_msg = udev_ctrl_receive_msg(ctrl_conn); |
| 933 | if (!ctrl_msg) |
| 934 | return 1; |
| 935 | |
| 936 | i = udev_ctrl_get_set_log_level(ctrl_msg); |
| 937 | if (i >= 0) { |
| 938 | log_debug("udevd message (SET_LOG_LEVEL) received, log_priority=%i", i)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 938, __func__, "udevd message (SET_LOG_LEVEL) received, log_priority=%i" , i) : -abs(_e); }); |
| 939 | log_set_max_level(i)log_set_max_level_realm(LOG_REALM_UDEV, (i)); |
| 940 | manager_kill_workers(manager); |
| 941 | } |
| 942 | |
| 943 | if (udev_ctrl_get_stop_exec_queue(ctrl_msg) > 0) { |
| 944 | log_debug("udevd message (STOP_EXEC_QUEUE) received")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 944, __func__, "udevd message (STOP_EXEC_QUEUE) received" ) : -abs(_e); }); |
| 945 | manager->stop_exec_queue = true1; |
| 946 | } |
| 947 | |
| 948 | if (udev_ctrl_get_start_exec_queue(ctrl_msg) > 0) { |
| 949 | log_debug("udevd message (START_EXEC_QUEUE) received")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 949, __func__, "udevd message (START_EXEC_QUEUE) received" ) : -abs(_e); }); |
| 950 | manager->stop_exec_queue = false0; |
| 951 | event_queue_start(manager); |
| 952 | } |
| 953 | |
| 954 | if (udev_ctrl_get_reload(ctrl_msg) > 0) { |
| 955 | log_debug("udevd message (RELOAD) received")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 955, __func__, "udevd message (RELOAD) received" ) : -abs(_e); }); |
| 956 | manager_reload(manager); |
| 957 | } |
| 958 | |
| 959 | str = udev_ctrl_get_set_env(ctrl_msg); |
| 960 | if (str != NULL((void*)0)) { |
| 961 | _cleanup_free___attribute__((cleanup(freep))) char *key = NULL((void*)0); |
| 962 | |
| 963 | key = strdup(str); |
| 964 | if (key) { |
| 965 | char *val; |
| 966 | |
| 967 | val = strchr(key, '='); |
| 968 | if (val != NULL((void*)0)) { |
| 969 | val[0] = '\0'; |
| 970 | val = &val[1]; |
| 971 | if (val[0] == '\0') { |
| 972 | log_debug("udevd message (ENV) received, unset '%s'", key)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 972, __func__, "udevd message (ENV) received, unset '%s'" , key) : -abs(_e); }); |
| 973 | udev_list_entry_add(&manager->properties, key, NULL((void*)0)); |
| 974 | } else { |
| 975 | log_debug("udevd message (ENV) received, set '%s=%s'", key, val)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 975, __func__, "udevd message (ENV) received, set '%s=%s'" , key, val) : -abs(_e); }); |
| 976 | udev_list_entry_add(&manager->properties, key, val); |
| 977 | } |
| 978 | } else |
| 979 | log_error("wrong key format '%s'", key)({ int _level = (((3))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 979, __func__, "wrong key format '%s'" , key) : -abs(_e); }); |
| 980 | } |
| 981 | manager_kill_workers(manager); |
| 982 | } |
| 983 | |
| 984 | i = udev_ctrl_get_set_children_max(ctrl_msg); |
| 985 | if (i >= 0) { |
| 986 | log_debug("udevd message (SET_MAX_CHILDREN) received, children_max=%i", i)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 986, __func__, "udevd message (SET_MAX_CHILDREN) received, children_max=%i" , i) : -abs(_e); }); |
| 987 | arg_children_max = i; |
| 988 | |
| 989 | (void) sd_notifyf(false0, |
| 990 | "READY=1\n" |
| 991 | "STATUS=Processing with %u children at max", arg_children_max); |
| 992 | } |
| 993 | |
| 994 | if (udev_ctrl_get_ping(ctrl_msg) > 0) |
| 995 | log_debug("udevd message (SYNC) received")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 995, __func__, "udevd message (SYNC) received" ) : -abs(_e); }); |
| 996 | |
| 997 | if (udev_ctrl_get_exit(ctrl_msg) > 0) { |
| 998 | log_debug("udevd message (EXIT) received")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 998, __func__, "udevd message (EXIT) received" ) : -abs(_e); }); |
| 999 | manager_exit(manager); |
| 1000 | /* keep reference to block the client until we exit |
| 1001 | TODO: deal with several blocking exit requests */ |
| 1002 | manager->ctrl_conn_blocking = udev_ctrl_connection_ref(ctrl_conn); |
| 1003 | } |
| 1004 | |
| 1005 | return 1; |
| 1006 | } |
| 1007 | |
| 1008 | static int synthesize_change(struct udev_device *dev) { |
| 1009 | char filename[UTIL_PATH_SIZE1024]; |
| 1010 | int r; |
| 1011 | |
| 1012 | if (streq_ptr("block", udev_device_get_subsystem(dev)) && |
| 1013 | streq_ptr("disk", udev_device_get_devtype(dev)) && |
| 1014 | !startswith(udev_device_get_sysname(dev), "dm-")) { |
| 1015 | bool_Bool part_table_read = false0; |
| 1016 | bool_Bool has_partitions = false0; |
| 1017 | int fd; |
| 1018 | struct udev *udev = udev_device_get_udev(dev); |
| 1019 | _cleanup_(udev_enumerate_unrefp)__attribute__((cleanup(udev_enumerate_unrefp))) struct udev_enumerate *e = NULL((void*)0); |
| 1020 | struct udev_list_entry *item; |
| 1021 | |
| 1022 | /* |
| 1023 | * Try to re-read the partition table. This only succeeds if |
| 1024 | * none of the devices is busy. The kernel returns 0 if no |
| 1025 | * partition table is found, and we will not get an event for |
| 1026 | * the disk. |
| 1027 | */ |
| 1028 | fd = open(udev_device_get_devnode(dev), O_RDONLY00|O_CLOEXEC02000000|O_NOFOLLOW0400000|O_NONBLOCK04000); |
| 1029 | if (fd >= 0) { |
| 1030 | r = flock(fd, LOCK_EX2|LOCK_NB4); |
| 1031 | if (r >= 0) |
| 1032 | r = ioctl(fd, BLKRRPART(((0U) << (((0 +8)+8)+14)) | (((0x12)) << (0 +8)) | (((95)) << 0) | ((0) << ((0 +8)+8))), 0); |
| 1033 | |
| 1034 | close(fd); |
| 1035 | if (r >= 0) |
| 1036 | part_table_read = true1; |
| 1037 | } |
| 1038 | |
| 1039 | /* search for partitions */ |
| 1040 | e = udev_enumerate_new(udev); |
| 1041 | if (!e) |
| 1042 | return -ENOMEM12; |
| 1043 | |
| 1044 | r = udev_enumerate_add_match_parent(e, dev); |
| 1045 | if (r < 0) |
| 1046 | return r; |
| 1047 | |
| 1048 | r = udev_enumerate_add_match_subsystem(e, "block"); |
| 1049 | if (r < 0) |
| 1050 | return r; |
| 1051 | |
| 1052 | r = udev_enumerate_scan_devices(e); |
| 1053 | if (r < 0) |
| 1054 | return r; |
| 1055 | |
| 1056 | udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e))for (item = udev_enumerate_get_list_entry(e); item != ((void* )0); item = udev_list_entry_get_next(item)) { |
| 1057 | _cleanup_(udev_device_unrefp)__attribute__((cleanup(udev_device_unrefp))) struct udev_device *d = NULL((void*)0); |
| 1058 | |
| 1059 | d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); |
| 1060 | if (!d) |
| 1061 | continue; |
| 1062 | |
| 1063 | if (!streq_ptr("partition", udev_device_get_devtype(d))) |
| 1064 | continue; |
| 1065 | |
| 1066 | has_partitions = true1; |
| 1067 | break; |
| 1068 | } |
| 1069 | |
| 1070 | /* |
| 1071 | * We have partitions and re-read the table, the kernel already sent |
| 1072 | * out a "change" event for the disk, and "remove/add" for all |
| 1073 | * partitions. |
| 1074 | */ |
| 1075 | if (part_table_read && has_partitions) |
| 1076 | return 0; |
| 1077 | |
| 1078 | /* |
| 1079 | * We have partitions but re-reading the partition table did not |
| 1080 | * work, synthesize "change" for the disk and all partitions. |
| 1081 | */ |
| 1082 | log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1082, __func__, "device %s closed, synthesising 'change'" , udev_device_get_devnode(dev)) : -abs(_e); }); |
| 1083 | strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL((void*)0)); |
| 1084 | write_string_file(filename, "change", WRITE_STRING_FILE_CREATE); |
| 1085 | |
| 1086 | udev_list_entry_foreach(item, udev_enumerate_get_list_entry(e))for (item = udev_enumerate_get_list_entry(e); item != ((void* )0); item = udev_list_entry_get_next(item)) { |
| 1087 | _cleanup_(udev_device_unrefp)__attribute__((cleanup(udev_device_unrefp))) struct udev_device *d = NULL((void*)0); |
| 1088 | |
| 1089 | d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)); |
| 1090 | if (!d) |
| 1091 | continue; |
| 1092 | |
| 1093 | if (!streq_ptr("partition", udev_device_get_devtype(d))) |
| 1094 | continue; |
| 1095 | |
| 1096 | log_debug("device %s closed, synthesising partition '%s' 'change'",({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1097, __func__, "device %s closed, synthesising partition '%s' 'change'" , udev_device_get_devnode(dev), udev_device_get_devnode(d)) : -abs(_e); }) |
| 1097 | udev_device_get_devnode(dev), udev_device_get_devnode(d))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1097, __func__, "device %s closed, synthesising partition '%s' 'change'" , udev_device_get_devnode(dev), udev_device_get_devnode(d)) : -abs(_e); }); |
| 1098 | strscpyl(filename, sizeof(filename), udev_device_get_syspath(d), "/uevent", NULL((void*)0)); |
| 1099 | write_string_file(filename, "change", WRITE_STRING_FILE_CREATE); |
| 1100 | } |
| 1101 | |
| 1102 | return 0; |
| 1103 | } |
| 1104 | |
| 1105 | log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1105, __func__, "device %s closed, synthesising 'change'" , udev_device_get_devnode(dev)) : -abs(_e); }); |
| 1106 | strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL((void*)0)); |
| 1107 | write_string_file(filename, "change", WRITE_STRING_FILE_CREATE); |
| 1108 | |
| 1109 | return 0; |
| 1110 | } |
| 1111 | |
| 1112 | static int on_inotify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { |
| 1113 | Manager *manager = userdata; |
| 1114 | union inotify_event_buffer buffer; |
| 1115 | struct inotify_event *e; |
| 1116 | ssize_t l; |
| 1117 | |
| 1118 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 1118, __PRETTY_FUNCTION__ ); } while (0); |
| 1119 | |
| 1120 | l = read(fd, &buffer, sizeof(buffer)); |
| 1121 | if (l < 0) { |
| 1122 | if (IN_SET(errno, EAGAIN, EINTR)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){11, 4})/sizeof(int)]; switch((*__errno_location ())) { case 11: case 4: _found = 1; break; default: break; } _found; })) |
| 1123 | return 1; |
| 1124 | |
| 1125 | return log_error_errno(errno, "Failed to read inotify fd: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1125, __func__, "Failed to read inotify fd: %m" ) : -abs(_e); }); |
| 1126 | } |
| 1127 | |
| 1128 | FOREACH_INOTIFY_EVENT(e, buffer, l)for ((e) = &buffer.ev; (uint8_t*) (e) < (uint8_t*) (buffer .raw) + (l); (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof (struct inotify_event) + (e)->len)) { |
| 1129 | _cleanup_(udev_device_unrefp)__attribute__((cleanup(udev_device_unrefp))) struct udev_device *dev = NULL((void*)0); |
| 1130 | |
| 1131 | dev = udev_watch_lookup(manager->udev, e->wd); |
| 1132 | if (!dev) |
| 1133 | continue; |
| 1134 | |
| 1135 | log_debug("inotify event: %x for %s", e->mask, udev_device_get_devnode(dev))({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1135, __func__, "inotify event: %x for %s" , e->mask, udev_device_get_devnode(dev)) : -abs(_e); }); |
| 1136 | if (e->mask & IN_CLOSE_WRITE0x00000008) { |
| 1137 | synthesize_change(dev); |
| 1138 | |
| 1139 | /* settle might be waiting on us to determine the queue |
| 1140 | * state. If we just handled an inotify event, we might have |
| 1141 | * generated a "change" event, but we won't have queued up |
| 1142 | * the resultant uevent yet. Do that. |
| 1143 | */ |
| 1144 | on_uevent(NULL((void*)0), -1, 0, manager); |
| 1145 | } else if (e->mask & IN_IGNORED0x00008000) |
| 1146 | udev_watch_end(manager->udev, dev); |
| 1147 | } |
| 1148 | |
| 1149 | return 1; |
| 1150 | } |
| 1151 | |
| 1152 | static int on_sigterm(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
| 1153 | Manager *manager = userdata; |
| 1154 | |
| 1155 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 1155, __PRETTY_FUNCTION__ ); } while (0); |
| 1156 | |
| 1157 | manager_exit(manager); |
| 1158 | |
| 1159 | return 1; |
| 1160 | } |
| 1161 | |
| 1162 | static int on_sighup(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
| 1163 | Manager *manager = userdata; |
| 1164 | |
| 1165 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 1165, __PRETTY_FUNCTION__ ); } while (0); |
| 1166 | |
| 1167 | manager_reload(manager); |
| 1168 | |
| 1169 | return 1; |
| 1170 | } |
| 1171 | |
| 1172 | static int on_sigchld(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) { |
| 1173 | Manager *manager = userdata; |
| 1174 | |
| 1175 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 1175, __PRETTY_FUNCTION__ ); } while (0); |
| 1176 | |
| 1177 | for (;;) { |
| 1178 | pid_t pid; |
| 1179 | int status; |
| 1180 | struct worker *worker; |
| 1181 | |
| 1182 | pid = waitpid(-1, &status, WNOHANG1); |
| 1183 | if (pid <= 0) |
| 1184 | break; |
| 1185 | |
| 1186 | worker = hashmap_get(manager->workers, PID_TO_PTR(pid)); |
| 1187 | if (!worker) { |
| 1188 | log_warning("worker ["PID_FMT"] is unknown, ignoring", pid)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1188, __func__, "worker [""%" "i""] is unknown, ignoring" , pid) : -abs(_e); }); |
| 1189 | continue; |
| 1190 | } |
| 1191 | |
| 1192 | if (WIFEXITED(status)(((status) & 0x7f) == 0)) { |
| 1193 | if (WEXITSTATUS(status)(((status) & 0xff00) >> 8) == 0) |
| 1194 | log_debug("worker ["PID_FMT"] exited", pid)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1194, __func__, "worker [""%" "i""] exited" , pid) : -abs(_e); }); |
| 1195 | else |
| 1196 | log_warning("worker ["PID_FMT"] exited with return code %i", pid, WEXITSTATUS(status))({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1196, __func__, "worker [""%" "i""] exited with return code %i" , pid, (((status) & 0xff00) >> 8)) : -abs(_e); }); |
| 1197 | } else if (WIFSIGNALED(status)(((signed char) (((status) & 0x7f) + 1) >> 1) > 0 )) { |
| 1198 | log_warning("worker ["PID_FMT"] terminated by signal %i (%s)", pid, WTERMSIG(status), signal_to_string(WTERMSIG(status)))({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1198, __func__, "worker [""%" "i""] terminated by signal %i (%s)" , pid, ((status) & 0x7f), signal_to_string(((status) & 0x7f))) : -abs(_e); }); |
| 1199 | } else if (WIFSTOPPED(status)(((status) & 0xff) == 0x7f)) { |
| 1200 | log_info("worker ["PID_FMT"] stopped", pid)({ int _level = (((6))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1200, __func__, "worker [""%" "i""] stopped" , pid) : -abs(_e); }); |
| 1201 | continue; |
| 1202 | } else if (WIFCONTINUED(status)((status) == 0xffff)) { |
| 1203 | log_info("worker ["PID_FMT"] continued", pid)({ int _level = (((6))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1203, __func__, "worker [""%" "i""] continued" , pid) : -abs(_e); }); |
| 1204 | continue; |
| 1205 | } else |
| 1206 | log_warning("worker ["PID_FMT"] exit with status 0x%04x", pid, status)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1206, __func__, "worker [""%" "i""] exit with status 0x%04x" , pid, status) : -abs(_e); }); |
| 1207 | |
| 1208 | if (!WIFEXITED(status)(((status) & 0x7f) == 0) || WEXITSTATUS(status)(((status) & 0xff00) >> 8) != 0) { |
| 1209 | if (worker->event) { |
| 1210 | log_error("worker ["PID_FMT"] failed while handling '%s'", pid, worker->event->devpath)({ int _level = (((3))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1210, __func__, "worker [""%" "i""] failed while handling '%s'" , pid, worker->event->devpath) : -abs(_e); }); |
| 1211 | /* delete state from disk */ |
| 1212 | udev_device_delete_db(worker->event->dev); |
| 1213 | udev_device_tag_index(worker->event->dev, NULL((void*)0), false0); |
| 1214 | /* forward kernel event without amending it */ |
| 1215 | udev_monitor_send_device(manager->monitor, NULL((void*)0), worker->event->dev_kernel); |
| 1216 | } |
| 1217 | } |
| 1218 | |
| 1219 | worker_free(worker); |
| 1220 | } |
| 1221 | |
| 1222 | /* we can start new workers, try to schedule events */ |
| 1223 | event_queue_start(manager); |
| 1224 | |
| 1225 | return 1; |
| 1226 | } |
| 1227 | |
| 1228 | static int on_post(sd_event_source *s, void *userdata) { |
| 1229 | Manager *manager = userdata; |
| 1230 | int r; |
| 1231 | |
| 1232 | assert(manager)do { if ((__builtin_expect(!!(!(manager)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("manager"), "../src/udev/udevd.c", 1232, __PRETTY_FUNCTION__ ); } while (0); |
| 1233 | |
| 1234 | if (LIST_IS_EMPTY(manager->events)(!(manager->events))) { |
| 1235 | /* no pending events */ |
| 1236 | if (!hashmap_isempty(manager->workers)) { |
| 1237 | /* there are idle workers */ |
| 1238 | log_debug("cleanup idle workers")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1238, __func__, "cleanup idle workers" ) : -abs(_e); }); |
| 1239 | manager_kill_workers(manager); |
| 1240 | } else { |
| 1241 | /* we are idle */ |
| 1242 | if (manager->exit) { |
| 1243 | r = sd_event_exit(manager->event, 0); |
| 1244 | if (r < 0) |
| 1245 | return r; |
| 1246 | } else if (manager->cgroup) |
| 1247 | /* cleanup possible left-over processes in our cgroup */ |
| 1248 | cg_kill(SYSTEMD_CGROUP_CONTROLLER"_systemd", manager->cgroup, SIGKILL9, CGROUP_IGNORE_SELF, NULL((void*)0), NULL((void*)0), NULL((void*)0)); |
| 1249 | } |
| 1250 | } |
| 1251 | |
| 1252 | return 1; |
| 1253 | } |
| 1254 | |
| 1255 | static int listen_fds(int *rctrl, int *rnetlink) { |
| 1256 | _cleanup_(udev_unrefp)__attribute__((cleanup(udev_unrefp))) struct udev *udev = NULL((void*)0); |
| 1257 | int ctrl_fd = -1, netlink_fd = -1; |
| 1258 | int fd, n, r; |
| 1259 | |
| 1260 | assert(rctrl)do { if ((__builtin_expect(!!(!(rctrl)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("rctrl"), "../src/udev/udevd.c", 1260, __PRETTY_FUNCTION__ ); } while (0); |
| 1261 | assert(rnetlink)do { if ((__builtin_expect(!!(!(rnetlink)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("rnetlink"), "../src/udev/udevd.c", 1261, __PRETTY_FUNCTION__ ); } while (0); |
| 1262 | |
| 1263 | n = sd_listen_fds(true1); |
| 1264 | if (n < 0) |
| 1265 | return n; |
| 1266 | |
| 1267 | for (fd = SD_LISTEN_FDS_START3; fd < n + SD_LISTEN_FDS_START3; fd++) { |
| 1268 | if (sd_is_socket(fd, AF_LOCAL1, SOCK_SEQPACKETSOCK_SEQPACKET, -1)) { |
| 1269 | if (ctrl_fd >= 0) |
| 1270 | return -EINVAL22; |
| 1271 | ctrl_fd = fd; |
| 1272 | continue; |
| 1273 | } |
| 1274 | |
| 1275 | if (sd_is_socket(fd, AF_NETLINK16, SOCK_RAWSOCK_RAW, -1)) { |
| 1276 | if (netlink_fd >= 0) |
| 1277 | return -EINVAL22; |
| 1278 | netlink_fd = fd; |
| 1279 | continue; |
| 1280 | } |
| 1281 | |
| 1282 | return -EINVAL22; |
| 1283 | } |
| 1284 | |
| 1285 | if (ctrl_fd < 0) { |
| 1286 | _cleanup_(udev_ctrl_unrefp)__attribute__((cleanup(udev_ctrl_unrefp))) struct udev_ctrl *ctrl = NULL((void*)0); |
| 1287 | |
| 1288 | udev = udev_new(); |
| 1289 | if (!udev) |
| 1290 | return -ENOMEM12; |
| 1291 | |
| 1292 | ctrl = udev_ctrl_new(udev); |
| 1293 | if (!ctrl) |
| 1294 | return log_error_errno(EINVAL, "error initializing udev control socket")({ int _level = ((3)), _e = ((22)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1294, __func__, "error initializing udev control socket" ) : -abs(_e); }); |
| 1295 | |
| 1296 | r = udev_ctrl_enable_receiving(ctrl); |
| 1297 | if (r < 0) |
| 1298 | return log_error_errno(EINVAL, "error binding udev control socket")({ int _level = ((3)), _e = ((22)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1298, __func__, "error binding udev control socket" ) : -abs(_e); }); |
| 1299 | |
| 1300 | fd = udev_ctrl_get_fd(ctrl); |
| 1301 | if (fd < 0) |
| 1302 | return log_error_errno(EIO, "could not get ctrl fd")({ int _level = ((3)), _e = ((5)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1302, __func__, "could not get ctrl fd" ) : -abs(_e); }); |
| 1303 | |
| 1304 | ctrl_fd = fcntl(fd, F_DUPFD_CLOEXEC1030, 3); |
| 1305 | if (ctrl_fd < 0) |
| 1306 | return log_error_errno(errno, "could not dup ctrl fd: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1306, __func__, "could not dup ctrl fd: %m" ) : -abs(_e); }); |
| 1307 | } |
| 1308 | |
| 1309 | if (netlink_fd < 0) { |
| 1310 | _cleanup_(udev_monitor_unrefp)__attribute__((cleanup(udev_monitor_unrefp))) struct udev_monitor *monitor = NULL((void*)0); |
| 1311 | |
| 1312 | if (!udev) { |
| 1313 | udev = udev_new(); |
| 1314 | if (!udev) |
| 1315 | return -ENOMEM12; |
| 1316 | } |
| 1317 | |
| 1318 | monitor = udev_monitor_new_from_netlink(udev, "kernel"); |
| 1319 | if (!monitor) |
| 1320 | return log_error_errno(EINVAL, "error initializing netlink socket")({ int _level = ((3)), _e = ((22)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1320, __func__, "error initializing netlink socket" ) : -abs(_e); }); |
| 1321 | |
| 1322 | (void) udev_monitor_set_receive_buffer_size(monitor, 128 * 1024 * 1024); |
| 1323 | |
| 1324 | r = udev_monitor_enable_receiving(monitor); |
| 1325 | if (r < 0) |
| 1326 | return log_error_errno(EINVAL, "error binding netlink socket")({ int _level = ((3)), _e = ((22)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1326, __func__, "error binding netlink socket" ) : -abs(_e); }); |
| 1327 | |
| 1328 | fd = udev_monitor_get_fd(monitor); |
| 1329 | if (fd < 0) |
| 1330 | return log_error_errno(netlink_fd, "could not get uevent fd: %m")({ int _level = ((3)), _e = ((netlink_fd)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1330, __func__, "could not get uevent fd: %m" ) : -abs(_e); }); |
| 1331 | |
| 1332 | netlink_fd = fcntl(fd, F_DUPFD_CLOEXEC1030, 3); |
| 1333 | if (netlink_fd < 0) |
| 1334 | return log_error_errno(errno, "could not dup netlink fd: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1334, __func__, "could not dup netlink fd: %m" ) : -abs(_e); }); |
| 1335 | } |
| 1336 | |
| 1337 | *rctrl = ctrl_fd; |
| 1338 | *rnetlink = netlink_fd; |
| 1339 | |
| 1340 | return 0; |
| 1341 | } |
| 1342 | |
| 1343 | /* |
| 1344 | * read the kernel command line, in case we need to get into debug mode |
| 1345 | * udev.log_priority=<level> syslog priority |
| 1346 | * udev.children_max=<number of workers> events are fully serialized if set to 1 |
| 1347 | * udev.exec_delay=<number of seconds> delay execution of every executed program |
| 1348 | * udev.event_timeout=<number of seconds> seconds to wait before terminating an event |
| 1349 | */ |
| 1350 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
| 1351 | int r = 0; |
| 1352 | |
| 1353 | assert(key)do { if ((__builtin_expect(!!(!(key)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("key"), "../src/udev/udevd.c", 1353, __PRETTY_FUNCTION__ ); } while (0); |
| 1354 | |
| 1355 | if (!value) |
| 1356 | return 0; |
| 1357 | |
| 1358 | if (proc_cmdline_key_streq(key, "udev.log_priority")) { |
| 1359 | |
| 1360 | if (proc_cmdline_value_missing(key, value)) |
| 1361 | return 0; |
| 1362 | |
| 1363 | r = util_log_priority(value); |
| 1364 | if (r >= 0) |
| 1365 | log_set_max_level(r)log_set_max_level_realm(LOG_REALM_UDEV, (r)); |
| 1366 | |
| 1367 | } else if (proc_cmdline_key_streq(key, "udev.event_timeout")) { |
| 1368 | |
| 1369 | if (proc_cmdline_value_missing(key, value)) |
| 1370 | return 0; |
| 1371 | |
| 1372 | r = safe_atou64(value, &arg_event_timeout_usec); |
| 1373 | if (r >= 0) { |
| 1374 | arg_event_timeout_usec *= USEC_PER_SEC((usec_t) 1000000ULL); |
| 1375 | arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1; |
| 1376 | } |
| 1377 | |
| 1378 | } else if (proc_cmdline_key_streq(key, "udev.children_max")) { |
| 1379 | |
| 1380 | if (proc_cmdline_value_missing(key, value)) |
| 1381 | return 0; |
| 1382 | |
| 1383 | r = safe_atou(value, &arg_children_max); |
| 1384 | |
| 1385 | } else if (proc_cmdline_key_streq(key, "udev.exec_delay")) { |
| 1386 | |
| 1387 | if (proc_cmdline_value_missing(key, value)) |
| 1388 | return 0; |
| 1389 | |
| 1390 | r = safe_atoi(value, &arg_exec_delay); |
| 1391 | |
| 1392 | } else if (startswith(key, "udev.")) |
| 1393 | log_warning("Unknown udev kernel command line option \"%s\"", key)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1393, __func__, "Unknown udev kernel command line option \"%s\"" , key) : -abs(_e); }); |
| 1394 | |
| 1395 | if (r < 0) |
| 1396 | log_warning_errno(r, "Failed to parse \"%s=%s\", ignoring: %m", key, value)({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1396, __func__, "Failed to parse \"%s=%s\", ignoring: %m" , key, value) : -abs(_e); }); |
| 1397 | |
| 1398 | return 0; |
| 1399 | } |
| 1400 | |
| 1401 | static void help(void) { |
| 1402 | printf("%s [OPTIONS...]\n\n" |
| 1403 | "Manages devices.\n\n" |
| 1404 | " -h --help Print this message\n" |
| 1405 | " -V --version Print version of the program\n" |
| 1406 | " -d --daemon Detach and run in the background\n" |
| 1407 | " -D --debug Enable debug output\n" |
| 1408 | " -c --children-max=INT Set maximum number of workers\n" |
| 1409 | " -e --exec-delay=SECONDS Seconds to wait before executing RUN=\n" |
| 1410 | " -t --event-timeout=SECONDS Seconds to wait before terminating an event\n" |
| 1411 | " -N --resolve-names=early|late|never\n" |
| 1412 | " When to resolve users and groups\n" |
| 1413 | , program_invocation_short_name); |
| 1414 | } |
| 1415 | |
| 1416 | static int parse_argv(int argc, char *argv[]) { |
| 1417 | static const struct option options[] = { |
| 1418 | { "daemon", no_argument0, NULL((void*)0), 'd' }, |
| 1419 | { "debug", no_argument0, NULL((void*)0), 'D' }, |
| 1420 | { "children-max", required_argument1, NULL((void*)0), 'c' }, |
| 1421 | { "exec-delay", required_argument1, NULL((void*)0), 'e' }, |
| 1422 | { "event-timeout", required_argument1, NULL((void*)0), 't' }, |
| 1423 | { "resolve-names", required_argument1, NULL((void*)0), 'N' }, |
| 1424 | { "help", no_argument0, NULL((void*)0), 'h' }, |
| 1425 | { "version", no_argument0, NULL((void*)0), 'V' }, |
| 1426 | {} |
| 1427 | }; |
| 1428 | |
| 1429 | int c; |
| 1430 | |
| 1431 | assert(argc >= 0)do { if ((__builtin_expect(!!(!(argc >= 0)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("argc >= 0"), "../src/udev/udevd.c", 1431 , __PRETTY_FUNCTION__); } while (0); |
| 1432 | assert(argv)do { if ((__builtin_expect(!!(!(argv)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("argv"), "../src/udev/udevd.c", 1432, __PRETTY_FUNCTION__ ); } while (0); |
| 1433 | |
| 1434 | while ((c = getopt_long(argc, argv, "c:de:Dt:N:hV", options, NULL((void*)0))) >= 0) { |
| 1435 | int r; |
| 1436 | |
| 1437 | switch (c) { |
| 1438 | |
| 1439 | case 'd': |
| 1440 | arg_daemonize = true1; |
| 1441 | break; |
| 1442 | case 'c': |
| 1443 | r = safe_atou(optarg, &arg_children_max); |
| 1444 | if (r < 0) |
| 1445 | log_warning("Invalid --children-max ignored: %s", optarg)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1445, __func__, "Invalid --children-max ignored: %s" , optarg) : -abs(_e); }); |
| 1446 | break; |
| 1447 | case 'e': |
| 1448 | r = safe_atoi(optarg, &arg_exec_delay); |
| 1449 | if (r < 0) |
| 1450 | log_warning("Invalid --exec-delay ignored: %s", optarg)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1450, __func__, "Invalid --exec-delay ignored: %s" , optarg) : -abs(_e); }); |
| 1451 | break; |
| 1452 | case 't': |
| 1453 | r = safe_atou64(optarg, &arg_event_timeout_usec); |
| 1454 | if (r < 0) |
| 1455 | log_warning("Invalid --event-timeout ignored: %s", optarg)({ int _level = (((4))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1455, __func__, "Invalid --event-timeout ignored: %s" , optarg) : -abs(_e); }); |
| 1456 | else { |
| 1457 | arg_event_timeout_usec *= USEC_PER_SEC((usec_t) 1000000ULL); |
| 1458 | arg_event_timeout_warn_usec = (arg_event_timeout_usec / 3) ? : 1; |
| 1459 | } |
| 1460 | break; |
| 1461 | case 'D': |
| 1462 | arg_debug = true1; |
| 1463 | break; |
| 1464 | case 'N': |
| 1465 | if (streq(optarg, "early")(strcmp((optarg),("early")) == 0)) { |
| 1466 | arg_resolve_names = 1; |
| 1467 | } else if (streq(optarg, "late")(strcmp((optarg),("late")) == 0)) { |
| 1468 | arg_resolve_names = 0; |
| 1469 | } else if (streq(optarg, "never")(strcmp((optarg),("never")) == 0)) { |
| 1470 | arg_resolve_names = -1; |
| 1471 | } else { |
| 1472 | log_error("resolve-names must be early, late or never")({ int _level = (((3))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1472, __func__, "resolve-names must be early, late or never" ) : -abs(_e); }); |
| 1473 | return 0; |
| 1474 | } |
| 1475 | break; |
| 1476 | case 'h': |
| 1477 | help(); |
| 1478 | return 0; |
| 1479 | case 'V': |
| 1480 | printf("%s\n", PACKAGE_VERSION"239"); |
| 1481 | return 0; |
| 1482 | case '?': |
| 1483 | return -EINVAL22; |
| 1484 | default: |
| 1485 | assert_not_reached("Unhandled option")do { log_assert_failed_unreachable_realm(LOG_REALM_UDEV, ("Unhandled option" ), "../src/udev/udevd.c", 1485, __PRETTY_FUNCTION__); } while (0); |
| 1486 | |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | return 1; |
| 1491 | } |
| 1492 | |
| 1493 | static int manager_new(Manager **ret, int fd_ctrl, int fd_uevent, const char *cgroup) { |
| 1494 | _cleanup_(manager_freep)__attribute__((cleanup(manager_freep))) Manager *manager = NULL((void*)0); |
| 1495 | int r, fd_worker, one = 1; |
| 1496 | |
| 1497 | assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("ret"), "../src/udev/udevd.c", 1497, __PRETTY_FUNCTION__ ); } while (0); |
| 1498 | assert(fd_ctrl >= 0)do { if ((__builtin_expect(!!(!(fd_ctrl >= 0)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("fd_ctrl >= 0"), "../src/udev/udevd.c", 1498 , __PRETTY_FUNCTION__); } while (0); |
| 1499 | assert(fd_uevent >= 0)do { if ((__builtin_expect(!!(!(fd_uevent >= 0)),0))) log_assert_failed_realm (LOG_REALM_UDEV, ("fd_uevent >= 0"), "../src/udev/udevd.c" , 1499, __PRETTY_FUNCTION__); } while (0); |
| 1500 | |
| 1501 | manager = new0(Manager, 1)((Manager*) calloc((1), sizeof(Manager))); |
| 1502 | if (!manager) |
| 1503 | return log_oom()log_oom_internal(LOG_REALM_UDEV, "../src/udev/udevd.c", 1503, __func__); |
| 1504 | |
| 1505 | manager->fd_inotify = -1; |
| 1506 | manager->worker_watch[WRITE_END1] = -1; |
| 1507 | manager->worker_watch[READ_END0] = -1; |
| 1508 | |
| 1509 | manager->udev = udev_new(); |
| 1510 | if (!manager->udev) |
| 1511 | return log_error_errno(errno, "could not allocate udev context: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1511, __func__, "could not allocate udev context: %m" ) : -abs(_e); }); |
| 1512 | |
| 1513 | udev_builtin_init(manager->udev); |
| 1514 | |
| 1515 | manager->rules = udev_rules_new(manager->udev, arg_resolve_names); |
| 1516 | if (!manager->rules) |
| 1517 | return log_error_errno(ENOMEM, "error reading rules")({ int _level = ((3)), _e = ((12)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1517, __func__, "error reading rules" ) : -abs(_e); }); |
| 1518 | |
| 1519 | LIST_HEAD_INIT(manager->events)do { (manager->events) = ((void*)0); } while (0); |
| 1520 | udev_list_init(manager->udev, &manager->properties, true1); |
| 1521 | |
| 1522 | manager->cgroup = cgroup; |
| 1523 | |
| 1524 | manager->ctrl = udev_ctrl_new_from_fd(manager->udev, fd_ctrl); |
| 1525 | if (!manager->ctrl) |
| 1526 | return log_error_errno(EINVAL, "error taking over udev control socket")({ int _level = ((3)), _e = ((22)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1526, __func__, "error taking over udev control socket" ) : -abs(_e); }); |
| 1527 | |
| 1528 | manager->monitor = udev_monitor_new_from_netlink_fd(manager->udev, "kernel", fd_uevent); |
| 1529 | if (!manager->monitor) |
| 1530 | return log_error_errno(EINVAL, "error taking over netlink socket")({ int _level = ((3)), _e = ((22)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1530, __func__, "error taking over netlink socket" ) : -abs(_e); }); |
| 1531 | |
| 1532 | /* unnamed socket from workers to the main daemon */ |
| 1533 | r = socketpair(AF_LOCAL1, SOCK_DGRAMSOCK_DGRAM|SOCK_CLOEXECSOCK_CLOEXEC, 0, manager->worker_watch); |
| 1534 | if (r < 0) |
| 1535 | return log_error_errno(errno, "error creating socketpair: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1535, __func__, "error creating socketpair: %m" ) : -abs(_e); }); |
| 1536 | |
| 1537 | fd_worker = manager->worker_watch[READ_END0]; |
| 1538 | |
| 1539 | r = setsockopt(fd_worker, SOL_SOCKET1, SO_PASSCRED16, &one, sizeof(one)); |
| 1540 | if (r < 0) |
| 1541 | return log_error_errno(errno, "could not enable SO_PASSCRED: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1541, __func__, "could not enable SO_PASSCRED: %m" ) : -abs(_e); }); |
| 1542 | |
| 1543 | manager->fd_inotify = udev_watch_init(manager->udev); |
| 1544 | if (manager->fd_inotify < 0) |
| 1545 | return log_error_errno(ENOMEM, "error initializing inotify")({ int _level = ((3)), _e = ((12)), _realm = (LOG_REALM_UDEV) ; (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1545, __func__, "error initializing inotify" ) : -abs(_e); }); |
| 1546 | |
| 1547 | udev_watch_restore(manager->udev); |
| 1548 | |
| 1549 | /* block and listen to all signals on signalfd */ |
| 1550 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0)do { if ((__builtin_expect(!!(!(sigprocmask_many(0, ((void*)0 ), 15, 2, 1, 17, -1) >= 0)),0))) log_assert_failed_realm(LOG_REALM_UDEV , ("sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0" ), "../src/udev/udevd.c", 1550, __PRETTY_FUNCTION__); } while (0); |
| 1551 | |
| 1552 | r = sd_event_default(&manager->event); |
| 1553 | if (r < 0) |
| 1554 | return log_error_errno(r, "could not allocate event loop: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1554, __func__, "could not allocate event loop: %m" ) : -abs(_e); }); |
| 1555 | |
| 1556 | r = sd_event_add_signal(manager->event, NULL((void*)0), SIGINT2, on_sigterm, manager); |
| 1557 | if (r < 0) |
| 1558 | return log_error_errno(r, "error creating sigint event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1558, __func__, "error creating sigint event source: %m" ) : -abs(_e); }); |
| 1559 | |
| 1560 | r = sd_event_add_signal(manager->event, NULL((void*)0), SIGTERM15, on_sigterm, manager); |
| 1561 | if (r < 0) |
| 1562 | return log_error_errno(r, "error creating sigterm event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1562, __func__, "error creating sigterm event source: %m" ) : -abs(_e); }); |
| 1563 | |
| 1564 | r = sd_event_add_signal(manager->event, NULL((void*)0), SIGHUP1, on_sighup, manager); |
| 1565 | if (r < 0) |
| 1566 | return log_error_errno(r, "error creating sighup event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1566, __func__, "error creating sighup event source: %m" ) : -abs(_e); }); |
| 1567 | |
| 1568 | r = sd_event_add_signal(manager->event, NULL((void*)0), SIGCHLD17, on_sigchld, manager); |
| 1569 | if (r < 0) |
| 1570 | return log_error_errno(r, "error creating sigchld event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1570, __func__, "error creating sigchld event source: %m" ) : -abs(_e); }); |
| 1571 | |
| 1572 | r = sd_event_set_watchdog(manager->event, true1); |
| 1573 | if (r < 0) |
| 1574 | return log_error_errno(r, "error creating watchdog event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1574, __func__, "error creating watchdog event source: %m" ) : -abs(_e); }); |
| 1575 | |
| 1576 | r = sd_event_add_io(manager->event, &manager->ctrl_event, fd_ctrl, EPOLLINEPOLLIN, on_ctrl_msg, manager); |
| 1577 | if (r < 0) |
| 1578 | return log_error_errno(r, "error creating ctrl event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1578, __func__, "error creating ctrl event source: %m" ) : -abs(_e); }); |
| 1579 | |
| 1580 | /* This needs to be after the inotify and uevent handling, to make sure |
| 1581 | * that the ping is send back after fully processing the pending uevents |
| 1582 | * (including the synthetic ones we may create due to inotify events). |
| 1583 | */ |
| 1584 | r = sd_event_source_set_priority(manager->ctrl_event, SD_EVENT_PRIORITY_IDLE); |
| 1585 | if (r < 0) |
| 1586 | return log_error_errno(r, "cold not set IDLE event priority for ctrl event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1586, __func__, "cold not set IDLE event priority for ctrl event source: %m" ) : -abs(_e); }); |
| 1587 | |
| 1588 | r = sd_event_add_io(manager->event, &manager->inotify_event, manager->fd_inotify, EPOLLINEPOLLIN, on_inotify, manager); |
| 1589 | if (r < 0) |
| 1590 | return log_error_errno(r, "error creating inotify event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1590, __func__, "error creating inotify event source: %m" ) : -abs(_e); }); |
| 1591 | |
| 1592 | r = sd_event_add_io(manager->event, &manager->uevent_event, fd_uevent, EPOLLINEPOLLIN, on_uevent, manager); |
| 1593 | if (r < 0) |
| 1594 | return log_error_errno(r, "error creating uevent event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1594, __func__, "error creating uevent event source: %m" ) : -abs(_e); }); |
| 1595 | |
| 1596 | r = sd_event_add_io(manager->event, NULL((void*)0), fd_worker, EPOLLINEPOLLIN, on_worker, manager); |
| 1597 | if (r < 0) |
| 1598 | return log_error_errno(r, "error creating worker event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1598, __func__, "error creating worker event source: %m" ) : -abs(_e); }); |
| 1599 | |
| 1600 | r = sd_event_add_post(manager->event, NULL((void*)0), on_post, manager); |
| 1601 | if (r < 0) |
| 1602 | return log_error_errno(r, "error creating post event source: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1602, __func__, "error creating post event source: %m" ) : -abs(_e); }); |
| 1603 | |
| 1604 | *ret = TAKE_PTR(manager)({ typeof(manager) _ptr_ = (manager); (manager) = ((void*)0); _ptr_; }); |
| 1605 | |
| 1606 | return 0; |
| 1607 | } |
| 1608 | |
| 1609 | static int run(int fd_ctrl, int fd_uevent, const char *cgroup) { |
| 1610 | _cleanup_(manager_freep)__attribute__((cleanup(manager_freep))) Manager *manager = NULL((void*)0); |
| 1611 | int r; |
| 1612 | |
| 1613 | r = manager_new(&manager, fd_ctrl, fd_uevent, cgroup); |
| 1614 | if (r < 0) { |
| 1615 | r = log_error_errno(r, "failed to allocate manager object: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1615, __func__, "failed to allocate manager object: %m" ) : -abs(_e); }); |
| 1616 | goto exit; |
| 1617 | } |
| 1618 | |
| 1619 | r = udev_rules_apply_static_dev_perms(manager->rules); |
| 1620 | if (r < 0) |
| 1621 | log_error_errno(r, "failed to apply permissions on static device nodes: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1621, __func__, "failed to apply permissions on static device nodes: %m" ) : -abs(_e); }); |
| 1622 | |
| 1623 | (void) sd_notifyf(false0, |
| 1624 | "READY=1\n" |
| 1625 | "STATUS=Processing with %u children at max", arg_children_max); |
| 1626 | |
| 1627 | r = sd_event_loop(manager->event); |
| 1628 | if (r < 0) { |
| 1629 | log_error_errno(r, "event loop failed: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1629, __func__, "event loop failed: %m" ) : -abs(_e); }); |
| 1630 | goto exit; |
| 1631 | } |
| 1632 | |
| 1633 | sd_event_get_exit_code(manager->event, &r); |
| 1634 | |
| 1635 | exit: |
| 1636 | sd_notify(false0, |
| 1637 | "STOPPING=1\n" |
| 1638 | "STATUS=Shutting down..."); |
| 1639 | if (manager) |
| 1640 | udev_ctrl_cleanup(manager->ctrl); |
| 1641 | return r; |
| 1642 | } |
| 1643 | |
| 1644 | int main(int argc, char *argv[]) { |
| 1645 | _cleanup_free___attribute__((cleanup(freep))) char *cgroup = NULL((void*)0); |
| 1646 | int fd_ctrl = -1, fd_uevent = -1; |
| 1647 | int r; |
| 1648 | |
| 1649 | log_set_target(LOG_TARGET_AUTO); |
| 1650 | udev_parse_config(); |
| 1651 | log_parse_environment()log_parse_environment_realm(LOG_REALM_UDEV); |
| 1652 | log_open(); |
| 1653 | |
| 1654 | r = parse_argv(argc, argv); |
| 1655 | if (r <= 0) |
| 1656 | goto exit; |
| 1657 | |
| 1658 | r = proc_cmdline_parse(parse_proc_cmdline_item, NULL((void*)0), PROC_CMDLINE_STRIP_RD_PREFIX); |
| 1659 | if (r < 0) |
| 1660 | log_warning_errno(r, "failed to parse kernel command line, ignoring: %m")({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1660, __func__, "failed to parse kernel command line, ignoring: %m" ) : -abs(_e); }); |
| 1661 | |
| 1662 | if (arg_debug) { |
| 1663 | log_set_target(LOG_TARGET_CONSOLE); |
| 1664 | log_set_max_level(LOG_DEBUG)log_set_max_level_realm(LOG_REALM_UDEV, (7)); |
| 1665 | } |
| 1666 | |
| 1667 | r = must_be_root(); |
| 1668 | if (r < 0) |
| 1669 | goto exit; |
| 1670 | |
| 1671 | if (arg_children_max == 0) { |
| 1672 | cpu_set_t cpu_set; |
| 1673 | unsigned long mem_limit; |
| 1674 | |
| 1675 | arg_children_max = 8; |
| 1676 | |
| 1677 | if (sched_getaffinity(0, sizeof(cpu_set), &cpu_set) == 0) |
| 1678 | arg_children_max += CPU_COUNT(&cpu_set)__sched_cpucount (sizeof (cpu_set_t), &cpu_set) * 2; |
| 1679 | |
| 1680 | mem_limit = physical_memory() / (128LU*1024*1024); |
| 1681 | arg_children_max = MAX(10U, MIN(arg_children_max, mem_limit))__extension__ ({ const typeof((10U)) __unique_prefix_A27 = (( 10U)); const typeof((__extension__ ({ const typeof((arg_children_max )) __unique_prefix_A25 = ((arg_children_max)); const typeof(( mem_limit)) __unique_prefix_B26 = ((mem_limit)); __unique_prefix_A25 < __unique_prefix_B26 ? __unique_prefix_A25 : __unique_prefix_B26 ; }))) __unique_prefix_B28 = ((__extension__ ({ const typeof( (arg_children_max)) __unique_prefix_A25 = ((arg_children_max) ); const typeof((mem_limit)) __unique_prefix_B26 = ((mem_limit )); __unique_prefix_A25 < __unique_prefix_B26 ? __unique_prefix_A25 : __unique_prefix_B26; }))); __unique_prefix_A27 > __unique_prefix_B28 ? __unique_prefix_A27 : __unique_prefix_B28; }); |
| 1682 | |
| 1683 | log_debug("set children_max to %u", arg_children_max)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1683, __func__, "set children_max to %u" , arg_children_max) : -abs(_e); }); |
| 1684 | } |
| 1685 | |
| 1686 | /* set umask before creating any file/directory */ |
| 1687 | r = chdir("/"); |
| 1688 | if (r < 0) { |
| 1689 | r = log_error_errno(errno, "could not change dir to /: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1689, __func__, "could not change dir to /: %m" ) : -abs(_e); }); |
| 1690 | goto exit; |
| 1691 | } |
| 1692 | |
| 1693 | umask(022); |
| 1694 | |
| 1695 | r = mac_selinux_init(); |
| 1696 | if (r < 0) { |
| 1697 | log_error_errno(r, "could not initialize labelling: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1697, __func__, "could not initialize labelling: %m" ) : -abs(_e); }); |
| 1698 | goto exit; |
| 1699 | } |
| 1700 | |
| 1701 | r = mkdir_errno_wrapper("/run/udev", 0755); |
| 1702 | if (r < 0 && r != -EEXIST17) { |
| 1703 | log_error_errno(r, "could not create /run/udev: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1703, __func__, "could not create /run/udev: %m" ) : -abs(_e); }); |
| 1704 | goto exit; |
| 1705 | } |
| 1706 | |
| 1707 | dev_setup(NULL((void*)0), UID_INVALID((uid_t) -1), GID_INVALID((gid_t) -1)); |
| 1708 | |
| 1709 | if (getppid() == 1) { |
| 1710 | /* get our own cgroup, we regularly kill everything udev has left behind |
| 1711 | we only do this on systemd systems, and only if we are directly spawned |
| 1712 | by PID1. otherwise we are not guaranteed to have a dedicated cgroup */ |
| 1713 | r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER"_systemd", 0, &cgroup); |
| 1714 | if (r < 0) { |
| 1715 | if (IN_SET(r, -ENOENT, -ENOMEDIUM)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended [20 - sizeof((int[]){-2, -123})/sizeof(int)]; switch(r) { case -2: case -123: _found = 1; break; default: break; } _found; } )) |
| 1716 | log_debug_errno(r, "did not find dedicated cgroup: %m")({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1716, __func__, "did not find dedicated cgroup: %m" ) : -abs(_e); }); |
| 1717 | else |
| 1718 | log_warning_errno(r, "failed to get cgroup: %m")({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1718, __func__, "failed to get cgroup: %m" ) : -abs(_e); }); |
| 1719 | } |
| 1720 | } |
| 1721 | |
| 1722 | r = listen_fds(&fd_ctrl, &fd_uevent); |
| 1723 | if (r < 0) { |
| 1724 | r = log_error_errno(r, "could not listen on fds: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1724, __func__, "could not listen on fds: %m" ) : -abs(_e); }); |
| 1725 | goto exit; |
| 1726 | } |
| 1727 | |
| 1728 | if (arg_daemonize) { |
| 1729 | pid_t pid; |
| 1730 | |
| 1731 | log_info("starting version " PACKAGE_VERSION)({ int _level = (((6))), _e = ((0)), _realm = (LOG_REALM_UDEV ); (log_get_max_level_realm(_realm) >= ((_level) & 0x07 )) ? log_internal_realm(((_realm) << 10 | (_level)), _e , "../src/udev/udevd.c", 1731, __func__, "starting version " "239" ) : -abs(_e); }); |
| 1732 | |
| 1733 | /* connect /dev/null to stdin, stdout, stderr */ |
| 1734 | if (log_get_max_level()log_get_max_level_realm(LOG_REALM_UDEV) < LOG_DEBUG7) { |
| 1735 | r = make_null_stdio(); |
| 1736 | if (r < 0) |
| 1737 | log_warning_errno(r, "Failed to redirect standard streams to /dev/null: %m")({ int _level = ((4)), _e = ((r)), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ((_level) & 0x07) ) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1737, __func__, "Failed to redirect standard streams to /dev/null: %m" ) : -abs(_e); }); |
| 1738 | } |
| 1739 | |
| 1740 | pid = fork(); |
| 1741 | switch (pid) { |
| 1742 | case 0: |
| 1743 | break; |
| 1744 | case -1: |
| 1745 | r = log_error_errno(errno, "fork of daemon failed: %m")({ int _level = ((3)), _e = (((*__errno_location ()))), _realm = (LOG_REALM_UDEV); (log_get_max_level_realm(_realm) >= ( (_level) & 0x07)) ? log_internal_realm(((_realm) << 10 | (_level)), _e, "../src/udev/udevd.c", 1745, __func__, "fork of daemon failed: %m" ) : -abs(_e); }); |
| 1746 | goto exit; |
| 1747 | default: |
| 1748 | mac_selinux_finish(); |
| 1749 | log_close(); |
| 1750 | _exit(EXIT_SUCCESS0); |
| 1751 | } |
| 1752 | |
| 1753 | setsid(); |
| 1754 | |
| 1755 | write_string_file("/proc/self/oom_score_adj", "-1000", 0); |
| 1756 | } |
| 1757 | |
| 1758 | r = run(fd_ctrl, fd_uevent, cgroup); |
| 1759 | |
| 1760 | exit: |
| 1761 | mac_selinux_finish(); |
| 1762 | log_close(); |
| 1763 | return r < 0 ? EXIT_FAILURE1 : EXIT_SUCCESS0; |
| 1764 | } |