1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2015 Canonical
9 Didier Roche <didrocks@ubuntu.com>
11 systemd is free software; you can redistribute it and/or modify it
12 under the terms of the GNU Lesser General Public License as published by
13 the Free Software Foundation; either version 2.1 of the License, or
14 (at your option) any later version.
16 systemd is distributed in the hope that it will be useful, but
17 WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public License
22 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 #include <sys/socket.h>
33 #include <sys/types.h>
37 #include "sd-daemon.h"
40 #include "event-util.h"
44 #include "socket-util.h"
48 #define IDLE_TIME_SECONDS 30
49 #define PLYMOUTH_REQUEST_KEY "K\2\2\3"
50 #define CLIENTS_MAX 128
54 typedef struct Client {
55 struct Manager *manager;
68 sd_event_source *event_source;
70 LIST_FIELDS(struct Client, clients);
73 typedef struct Manager {
76 LIST_HEAD(Client, clients);
82 sd_event_source *connection_event_source;
84 bool show_status_console;
90 sd_event_source *plymouth_event_source;
91 bool plymouth_cancel_sent;
93 bool cancel_requested;
96 static void client_free(Client *c);
97 static void manager_free(Manager *m);
99 DEFINE_TRIVIAL_CLEANUP_FUNC(Client*, client_free);
100 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
102 static int manager_write_console(Manager *m, const char *message) {
103 _cleanup_fclose_ FILE *console = NULL;
109 if (!m->show_status_console)
112 /* Reduce the SAK window by opening and closing console on every request */
113 console = fopen("/dev/console", "we");
118 fprintf(console, "\r%s\r%n", message, &l);
119 if (m->clear < (size_t)l)
120 m->clear = (size_t)l;
122 fputc('\r', console);
123 for (j = 0; j < m->clear; j++)
125 fputc('\r', console);
132 static double compute_percent(int pass, size_t cur, size_t max) {
133 /* Values stolen from e2fsck */
135 static const double pass_table[] = {
136 0, 70, 90, 92, 95, 100
142 if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0)
145 return pass_table[pass-1] +
146 (pass_table[pass] - pass_table[pass-1]) *
150 static int client_request_cancel(Client *c) {
151 FsckdMessage cancel_msg = {
162 n = send(c->fd, &cancel_msg, sizeof(FsckdMessage), 0);
164 return log_warning_errno(errno, "Cannot send cancel to fsck on (%u:%u): %m", major(c->devnum), minor(c->devnum));
165 if ((size_t) n < sizeof(FsckdMessage)) {
166 log_warning("Short send when sending cancel to fsck on (%u:%u).", major(c->devnum), minor(c->devnum));
174 static void client_free(Client *c) {
178 LIST_REMOVE(clients, c->manager->clients, c);
179 c->manager->n_clients--;
182 sd_event_source_unref(c->event_source);
188 static void manager_disconnect_plymouth(Manager *m) {
191 m->plymouth_event_source = sd_event_source_unref(m->plymouth_event_source);
192 m->plymouth_fd = safe_close(m->plymouth_fd);
193 m->plymouth_cancel_sent = false;
196 static int manager_plymouth_feedback_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
197 Manager *m = userdata;
204 l = read(m->plymouth_fd, buffer, sizeof(buffer));
206 log_warning_errno(errno, "Got error while reading from plymouth: %m");
207 manager_disconnect_plymouth(m);
211 manager_disconnect_plymouth(m);
215 if (l > 1 && buffer[0] == '\15')
216 log_error("Message update to plymouth wasn't delivered successfully");
218 /* the only answer support type we requested is a key interruption */
219 if (l > 2 && buffer[0] == '\2' && buffer[5] == '\3') {
220 m->cancel_requested = true;
222 /* cancel all connected clients */
223 LIST_FOREACH(clients, current, m->clients)
224 client_request_cancel(current);
230 static int manager_connect_plymouth(Manager *m) {
231 union sockaddr_union sa = PLYMOUTH_SOCKET;
234 /* try to connect or reconnect if sending a message */
235 if (m->plymouth_fd >= 0)
238 m->plymouth_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
239 if (m->plymouth_fd < 0)
240 return log_warning_errno(errno, "Connection to plymouth socket failed: %m");
242 if (connect(m->plymouth_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
243 r = log_warning_errno(errno, "Couldn't connect to plymouth: %m");
247 r = sd_event_add_io(m->event, &m->plymouth_event_source, m->plymouth_fd, EPOLLIN, manager_plymouth_feedback_handler, m);
249 log_warning_errno(r, "Can't listen to plymouth socket: %m");
256 manager_disconnect_plymouth(m);
260 static int plymouth_send_message(int plymouth_fd, const char *message, bool update) {
261 _cleanup_free_ char *packet = NULL;
268 if (asprintf(&packet, "%c\002%c%s%n", mode, (int) (strlen(message) + 1), message, &n) < 0)
271 return loop_write(plymouth_fd, packet, n + 1, true);
274 static int manager_send_plymouth_message(Manager *m, const char *message) {
275 const char *plymouth_cancel_message = NULL;
278 r = manager_connect_plymouth(m);
282 if (!m->plymouth_cancel_sent) {
284 /* Indicate to plymouth that we listen to Ctrl+C */
285 r = loop_write(m->plymouth_fd, PLYMOUTH_REQUEST_KEY, sizeof(PLYMOUTH_REQUEST_KEY), true);
287 return log_warning_errno(r, "Can't send to plymouth cancel key: %m");
289 m->plymouth_cancel_sent = true;
291 plymouth_cancel_message = strjoina("fsckd-cancel-msg:", _("Press Ctrl+C to cancel all filesystem checks in progress"));
293 r = plymouth_send_message(m->plymouth_fd, plymouth_cancel_message, false);
295 log_warning_errno(r, "Can't send filesystem cancel message to plymouth: %m");
297 } else if (m->numdevices == 0) {
299 m->plymouth_cancel_sent = false;
301 r = plymouth_send_message(m->plymouth_fd, "", false);
303 log_warning_errno(r, "Can't clear plymouth filesystem cancel message: %m");
306 r = plymouth_send_message(m->plymouth_fd, message, true);
308 return log_warning_errno(r, "Couldn't send \"%s\" to plymouth: %m", message);
313 static int manager_update_global_progress(Manager *m) {
314 Client *current = NULL;
315 _cleanup_free_ char *console_message = NULL;
316 _cleanup_free_ char *fsck_message = NULL;
317 int current_numdevices = 0, r;
318 double current_percent = 100;
320 /* get the overall percentage */
321 LIST_FOREACH(clients, current, m->clients) {
322 current_numdevices++;
324 /* right now, we only keep the minimum % of all fsckd processes. We could in the future trying to be
325 linear, but max changes and corresponds to the pass. We have all the informations into fsckd
326 already if we can treat that in a smarter way. */
327 current_percent = MIN(current_percent, current->percent);
330 /* update if there is anything user-visible to update */
331 if (fabs(current_percent - m->percent) > 0.001 || current_numdevices != m->numdevices) {
332 m->numdevices = current_numdevices;
333 m->percent = current_percent;
335 if (asprintf(&console_message,
336 ngettext("Checking in progress on %d disk (%3.1f%% complete)",
337 "Checking in progress on %d disks (%3.1f%% complete)", m->numdevices),
338 m->numdevices, m->percent) < 0)
341 if (asprintf(&fsck_message, "fsckd:%d:%3.1f:%s", m->numdevices, m->percent, console_message) < 0)
344 r = manager_write_console(m, console_message);
348 /* try to connect to plymouth and send message */
349 r = manager_send_plymouth_message(m, fsck_message);
356 static int client_progress_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
357 Client *client = userdata;
358 FsckProgress fsck_data;
367 /* check first if we need to cancel this client */
368 if (m->cancel_requested)
369 client_request_cancel(client);
371 /* ensure we have enough data to read */
372 r = ioctl(fd, FIONREAD, &buflen);
373 if (r == 0 && buflen != 0 && (size_t) buflen < sizeof(FsckProgress)) {
374 if (client->buflen != buflen)
375 client->buflen = buflen;
376 /* we got twice the same size from a bad behaving client, kick it off the list */
378 log_warning("Closing bad behaving fsck client connection at fd %d", client->fd);
380 manager_update_global_progress(m);
385 /* read actual data */
386 r = recv(fd, &fsck_data, sizeof(FsckProgress), 0);
388 log_debug("Fsck client connected to fd %d disconnected", client->fd);
390 } else if (r > 0 && r != sizeof(FsckProgress))
391 log_warning("Unexpected data structure sent to fsckd socket from fd: %d. Ignoring", client->fd);
392 else if (r > 0 && r == sizeof(FsckProgress)) {
393 client->devnum = fsck_data.devnum;
394 client->cur = fsck_data.cur;
395 client->max = fsck_data.max;
396 client->pass = fsck_data.pass;
397 client->percent = compute_percent(client->pass, client->cur, client->max);
398 log_debug("Getting progress for %u:%u (%lu, %lu, %d) : %3.1f%%",
399 major(client->devnum), minor(client->devnum),
400 client->cur, client->max, client->pass, client->percent);
402 log_error_errno(r, "Unknown error while trying to read fsck data: %m");
404 manager_update_global_progress(m);
409 static int manager_new_connection_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
410 _cleanup_(client_freep) Client *c = NULL;
411 _cleanup_close_ int new_client_fd = -1;
412 Manager *m = userdata;
417 /* Initialize and list new clients */
418 new_client_fd = accept4(m->connection_fd, NULL, NULL, SOCK_CLOEXEC);
419 if (new_client_fd < 0)
420 return log_error_errno(errno, "Couldn't accept a new connection: %m");
422 if (m->n_clients >= CLIENTS_MAX) {
423 log_error("Too many clients, refusing connection.");
427 log_debug("New fsck client connected to fd: %d", new_client_fd);
435 c->fd = new_client_fd;
438 r = sd_event_add_io(m->event, &c->event_source, c->fd, EPOLLIN, client_progress_handler, c);
444 LIST_PREPEND(clients, m->clients, c);
448 /* only request the client to cancel now in case the request is dropped by the client (chance to recancel) */
449 if (m->cancel_requested)
450 client_request_cancel(c);
456 static void manager_free(Manager *m) {
460 /* clear last line */
461 manager_write_console(m, NULL);
463 sd_event_source_unref(m->connection_event_source);
464 safe_close(m->connection_fd);
467 client_free(m->clients);
469 manager_disconnect_plymouth(m);
471 sd_event_unref(m->event);
476 static int manager_new(Manager **ret, int fd) {
477 _cleanup_(manager_freep) Manager *m = NULL;
482 m = new0(Manager, 1);
487 m->connection_fd = fd;
490 r = sd_event_default(&m->event);
494 if (access("/run/systemd/show-status", F_OK) >= 0)
495 m->show_status_console = true;
497 r = sd_event_add_io(m->event, &m->connection_event_source, fd, EPOLLIN, manager_new_connection_handler, m);
507 static int run_event_loop_with_timeout(sd_event *e, usec_t timeout) {
513 r = sd_event_get_state(e);
516 if (r == SD_EVENT_FINISHED)
519 r = sd_event_run(e, timeout);
523 /* timeout reached */
530 r = sd_event_get_exit_code(e, &code);
537 static void help(void) {
538 printf("%s [OPTIONS...]\n\n"
539 "Capture fsck progress and forward one stream to plymouth\n\n"
540 " -h --help Show this help\n"
541 " --version Show package version\n",
542 program_invocation_short_name);
545 static int parse_argv(int argc, char *argv[]) {
552 static const struct option options[] = {
553 { "help", no_argument, NULL, 'h' },
554 { "version", no_argument, NULL, ARG_VERSION },
563 while ((c = getopt_long(argc, argv, "hv", options, NULL)) >= 0)
571 puts(PACKAGE_STRING);
572 puts(SYSTEMD_FEATURES);
579 assert_not_reached("Unhandled option");
583 log_error("Extraneous arguments");
590 int main(int argc, char *argv[]) {
591 _cleanup_(manager_freep) Manager *m = NULL;
595 log_set_target(LOG_TARGET_AUTO);
596 log_parse_environment();
600 r = parse_argv(argc, argv);
604 n = sd_listen_fds(0);
606 log_error("Too many file descriptors received.");
610 fd = SD_LISTEN_FDS_START + 0;
612 fd = make_socket_fd(LOG_DEBUG, FSCKD_SOCKET_PATH, SOCK_STREAM | SOCK_CLOEXEC);
614 r = log_error_errno(fd, "Couldn't create listening socket fd on %s: %m", FSCKD_SOCKET_PATH);
619 r = manager_new(&m, fd);
621 log_error_errno(r, "Failed to allocate manager: %m");
625 r = run_event_loop_with_timeout(m->event, IDLE_TIME_SECONDS * USEC_PER_SEC);
627 log_error_errno(r, "Failed to run event loop: %m");
631 sd_event_get_exit_code(m->event, &r);
634 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;