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"
53 typedef struct Client {
54 struct Manager *manager;
64 LIST_FIELDS(struct Client, clients);
67 typedef struct Manager {
76 bool plymouth_cancel_sent;
77 bool cancel_requested;
80 static int connect_plymouth(Manager *m);
81 static int update_global_progress(Manager *m);
82 static void manager_free(Manager *m);
83 DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_free);
84 #define _cleanup_manager_free_ _cleanup_(manager_freep)
86 static double compute_percent(int pass, size_t cur, size_t max) {
87 /* Values stolen from e2fsck */
89 static const double pass_table[] = {
90 0, 70, 90, 92, 95, 100
96 if ((unsigned) pass >= ELEMENTSOF(pass_table) || max == 0)
99 return pass_table[pass-1] +
100 (pass_table[pass] - pass_table[pass-1]) *
104 static int request_cancel_client(Client *current) {
105 FsckdMessage cancel_msg = {
111 n = send(current->fd, &cancel_msg, sizeof(FsckdMessage), 0);
113 return log_warning_errno(errno, "Cannot send cancel to fsck on (%u:%u): %m", major(current->devnum), minor(current->devnum));
114 if ((size_t) n < sizeof(FsckdMessage)) {
115 log_warning("Short send when sending cancel to fsck on (%u:%u).", major(current->devnum), minor(current->devnum));
119 current->cancelled = true;
123 static void remove_client(Client **first, Client *item) {
124 LIST_REMOVE(clients, *first, item);
125 safe_close(item->fd);
129 static void on_plymouth_disconnect(Manager *m) {
130 m->plymouth_fd = safe_close(m->plymouth_fd);
131 m->plymouth_cancel_sent = false;
134 static int plymouth_feedback_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
135 Manager *m = userdata;
142 r = read(m->plymouth_fd, buffer, sizeof(buffer));
144 on_plymouth_disconnect(m);
146 if (buffer[0] == '\15')
147 log_error("Message update to plymouth wasn't delivered successfully");
149 /* the only answer support type we requested is a key interruption */
150 if (buffer[0] == '\2' && buffer[5] == '\3') {
151 m->cancel_requested = true;
152 /* cancel all connected clients */
153 LIST_FOREACH(clients, current, m->clients)
154 request_cancel_client(current);
161 static int send_message_plymouth_socket(int plymouth_fd, const char *message, bool update) {
162 _cleanup_free_ char *packet = NULL;
169 if (asprintf(&packet, "%c\002%c%s%n", mode, (int) (strlen(message) + 1), message, &n) < 0)
172 return loop_write(plymouth_fd, packet, n + 1, true);
175 static int send_message_plymouth(Manager *m, const char *message) {
177 const char *plymouth_cancel_message = NULL;
179 r = connect_plymouth(m);
183 if (!m->plymouth_cancel_sent) {
184 /* indicate to plymouth that we listen to Ctrl+C */
185 r = loop_write(m->plymouth_fd, PLYMOUTH_REQUEST_KEY, sizeof(PLYMOUTH_REQUEST_KEY), true);
187 return log_warning_errno(errno, "Can't send to plymouth cancel key: %m");
188 m->plymouth_cancel_sent = true;
189 plymouth_cancel_message = strjoina("fsckd-cancel-msg:", _("Press Ctrl+C to cancel all filesystem checks in progress"));
190 r = send_message_plymouth_socket(m->plymouth_fd, plymouth_cancel_message, false);
192 log_warning_errno(r, "Can't send filesystem cancel message to plymouth: %m");
193 } else if (m->numdevices == 0) {
194 m->plymouth_cancel_sent = false;
195 r = send_message_plymouth_socket(m->plymouth_fd, "", false);
197 log_warning_errno(r, "Can't clear plymouth filesystem cancel message: %m");
200 r = send_message_plymouth_socket(m->plymouth_fd, message, true);
202 return log_warning_errno(errno, "Couldn't send \"%s\" to plymouth: %m", message);
207 static int update_global_progress(Manager *m) {
208 Client *current = NULL;
209 _cleanup_free_ char *console_message = NULL;
210 _cleanup_free_ char *fsck_message = NULL;
211 int current_numdevices = 0, l = 0, r;
212 double current_percent = 100;
214 /* get the overall percentage */
215 LIST_FOREACH(clients, current, m->clients) {
216 current_numdevices++;
218 /* right now, we only keep the minimum % of all fsckd processes. We could in the future trying to be
219 linear, but max changes and corresponds to the pass. We have all the informations into fsckd
220 already if we can treat that in a smarter way. */
221 current_percent = MIN(current_percent, current->percent);
224 /* update if there is anything user-visible to update */
225 if (fabs(current_percent - m->percent) > 0.001 || current_numdevices != m->numdevices) {
226 m->numdevices = current_numdevices;
227 m->percent = current_percent;
229 if (asprintf(&console_message,
230 ngettext("Checking in progress on %d disk (%3.1f%% complete)",
231 "Checking in progress on %d disks (%3.1f%% complete)", m->numdevices),
232 m->numdevices, m->percent) < 0)
235 if (asprintf(&fsck_message, "fsckd:%d:%3.1f:%s", m->numdevices, m->percent, console_message) < 0)
238 /* write to console */
240 fprintf(m->console, "\r%s\r%n", console_message, &l);
244 /* try to connect to plymouth and send message */
245 r = send_message_plymouth(m, fsck_message);
247 log_debug("Couldn't send message to plymouth");
255 static int connect_plymouth(Manager *m) {
256 union sockaddr_union sa = PLYMOUTH_SOCKET;
259 /* try to connect or reconnect if sending a message */
260 if (m->plymouth_fd >= 0)
263 m->plymouth_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0);
264 if (m->plymouth_fd < 0)
265 return log_warning_errno(errno, "Connection to plymouth socket failed: %m");
267 if (connect(m->plymouth_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) {
268 r = log_warning_errno(errno, "Couldn't connect to plymouth: %m");
272 r = sd_event_add_io(m->event, NULL, m->plymouth_fd, EPOLLIN, plymouth_feedback_handler, m);
274 log_warning_errno(r, "Can't listen to plymouth socket: %m");
281 on_plymouth_disconnect(m);
285 static int progress_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
286 Client *client = userdata;
288 FsckProgress fsck_data;
295 /* check first if we need to cancel this client */
296 if (m->cancel_requested) {
297 if (!client->cancelled)
298 request_cancel_client(client);
301 /* ensure we have enough data to read */
302 r = ioctl(fd, FIONREAD, &buflen);
303 if (r == 0 && buflen != 0 && (size_t) buflen < sizeof(FsckProgress)) {
304 if (client->buflen != buflen)
305 client->buflen = buflen;
306 /* we got twice the same size from a bad behaving client, kick it off the list */
308 log_warning("Closing bad behaving fsck client connection at fd %d", client->fd);
309 remove_client(&(m->clients), client);
310 r = update_global_progress(m);
312 log_warning_errno(r, "Couldn't update global progress: %m");
317 /* read actual data */
318 r = recv(fd, &fsck_data, sizeof(FsckProgress), 0);
320 log_debug("Fsck client connected to fd %d disconnected", client->fd);
321 remove_client(&(m->clients), client);
322 } else if (r > 0 && r != sizeof(FsckProgress))
323 log_warning("Unexpected data structure sent to fsckd socket from fd: %d. Ignoring", client->fd);
324 else if (r > 0 && r == sizeof(FsckProgress)) {
325 client->devnum = fsck_data.devnum;
326 client->cur = fsck_data.cur;
327 client->max = fsck_data.max;
328 client->pass = fsck_data.pass;
329 client->percent = compute_percent(client->pass, client->cur, client->max);
330 log_debug("Getting progress for %u:%u (%lu, %lu, %d) : %3.1f%%",
331 major(client->devnum), minor(client->devnum),
332 client->cur, client->max, client->pass, client->percent);
334 log_error_errno(r, "Unknown error while trying to read fsck data: %m");
336 r = update_global_progress(m);
338 log_warning_errno(r, "Couldn't update global progress: %m");
343 static int new_connection_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
344 Manager *m = userdata;
345 Client *client = NULL;
346 int new_client_fd, r;
350 /* Initialize and list new clients */
351 new_client_fd = accept4(m->connection_fd, NULL, NULL, SOCK_CLOEXEC);
352 if (new_client_fd < 0)
353 return log_error_errno(errno, "Couldn't accept a new connection: %m");
355 log_debug("New fsck client connected to fd: %d", new_client_fd);
357 client = new0(Client, 1);
360 client->fd = new_client_fd;
362 LIST_PREPEND(clients, m->clients, client);
363 r = sd_event_add_io(m->event, NULL, client->fd, EPOLLIN, progress_handler, client);
365 remove_client(&(m->clients), client);
368 /* only request the client to cancel now in case the request is dropped by the client (chance to recancel) */
369 if (m->cancel_requested)
370 request_cancel_client(client);
375 static void manager_free(Manager *m) {
376 Client *current = NULL, *l = NULL;
380 /* clear last line */
381 if (m->console && m->clear > 0) {
384 fputc('\r', m->console);
385 for (j = 0; j < (unsigned) m->clear; j++)
386 fputc(' ', m->console);
387 fputc('\r', m->console);
391 safe_close(m->connection_fd);
392 safe_close(m->plymouth_fd);
396 LIST_FOREACH_SAFE(clients, current, l, m->clients)
397 remove_client(&(m->clients), current);
399 sd_event_unref(m->event);
404 static int manager_new(Manager **ret, int fd) {
405 _cleanup_manager_free_ Manager *m = NULL;
410 m = new0(Manager, 1);
414 r = sd_event_default(&m->event);
418 m->connection_fd = fd;
419 if (access("/run/systemd/show-status", F_OK) >= 0) {
420 m->console = fopen("/dev/console", "we");
422 return log_warning_errno(errno, "Can't connect to /dev/console: %m");
433 static int run_event_loop_with_timeout(sd_event *e, usec_t timeout) {
439 r = sd_event_get_state(e);
442 if (r == SD_EVENT_FINISHED)
445 r = sd_event_run(e, timeout);
449 /* timeout reached */
456 r = sd_event_get_exit_code(e, &code);
463 static void help(void) {
464 printf("%s [OPTIONS...]\n\n"
465 "Capture fsck progress and forward one stream to plymouth\n\n"
466 " -h --help Show this help\n"
467 " --version Show package version\n",
468 program_invocation_short_name);
471 static int parse_argv(int argc, char *argv[]) {
478 static const struct option options[] = {
479 { "help", no_argument, NULL, 'h' },
480 { "version", no_argument, NULL, ARG_VERSION },
489 while ((c = getopt_long(argc, argv, "hv", options, NULL)) >= 0)
497 puts(PACKAGE_STRING);
498 puts(SYSTEMD_FEATURES);
505 assert_not_reached("Unhandled option");
509 log_error("Extraneous arguments");
516 int main(int argc, char *argv[]) {
517 _cleanup_manager_free_ Manager *m = NULL;
521 log_set_target(LOG_TARGET_AUTO);
522 log_parse_environment();
526 r = parse_argv(argc, argv);
530 n = sd_listen_fds(0);
532 log_error("Too many file descriptors received.");
536 fd = SD_LISTEN_FDS_START + 0;
538 fd = make_socket_fd(LOG_DEBUG, FSCKD_SOCKET_PATH, SOCK_STREAM | SOCK_CLOEXEC);
540 r = log_error_errno(fd, "Couldn't create listening socket fd on %s: %m", FSCKD_SOCKET_PATH);
545 r = manager_new(&m, fd);
547 log_error_errno(r, "Failed to allocate manager: %m");
551 r = sd_event_add_io(m->event, NULL, fd, EPOLLIN, new_connection_handler, m);
553 log_error_errno(r, "Can't listen to connection socket: %m");
557 r = run_event_loop_with_timeout(m->event, IDLE_TIME_SECONDS * USEC_PER_SEC);
559 log_error_errno(r, "Failed to run event loop: %m");
563 sd_event_get_exit_code(m->event, &r);
566 return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;