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d025f1e4 ZJS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/signalfd.h> | |
23 | #include <sys/ioctl.h> | |
24 | #include <linux/sockios.h> | |
25 | #include <sys/statvfs.h> | |
26 | #include <sys/mman.h> | |
26687bf8 | 27 | #include <sys/timerfd.h> |
d025f1e4 ZJS |
28 | |
29 | #include <libudev.h> | |
30 | #include <systemd/sd-journal.h> | |
31 | #include <systemd/sd-messages.h> | |
32 | #include <systemd/sd-daemon.h> | |
33 | ||
34 | #ifdef HAVE_LOGIND | |
35 | #include <systemd/sd-login.h> | |
36 | #endif | |
37 | ||
a5c32cff | 38 | #include "fileio.h" |
d025f1e4 ZJS |
39 | #include "mkdir.h" |
40 | #include "hashmap.h" | |
41 | #include "journal-file.h" | |
42 | #include "socket-util.h" | |
43 | #include "cgroup-util.h" | |
44 | #include "list.h" | |
45 | #include "virt.h" | |
46 | #include "missing.h" | |
47 | #include "conf-parser.h" | |
48 | #include "journal-internal.h" | |
49 | #include "journal-vacuum.h" | |
50 | #include "journal-authenticate.h" | |
51 | #include "journald-server.h" | |
52 | #include "journald-rate-limit.h" | |
53 | #include "journald-kmsg.h" | |
54 | #include "journald-syslog.h" | |
55 | #include "journald-stream.h" | |
56 | #include "journald-console.h" | |
57 | #include "journald-native.h" | |
58 | ||
59 | #ifdef HAVE_ACL | |
60 | #include <sys/acl.h> | |
61 | #include <acl/libacl.h> | |
62 | #include "acl-util.h" | |
63 | #endif | |
64 | ||
65 | #ifdef HAVE_SELINUX | |
66 | #include <selinux/selinux.h> | |
67 | #endif | |
68 | ||
69 | #define USER_JOURNALS_MAX 1024 | |
70 | ||
26687bf8 | 71 | #define DEFAULT_SYNC_INTERVAL_USEC (5*USEC_PER_MINUTE) |
d025f1e4 ZJS |
72 | #define DEFAULT_RATE_LIMIT_INTERVAL (10*USEC_PER_SEC) |
73 | #define DEFAULT_RATE_LIMIT_BURST 200 | |
74 | ||
75 | #define RECHECK_AVAILABLE_SPACE_USEC (30*USEC_PER_SEC) | |
76 | ||
77 | static const char* const storage_table[] = { | |
78 | [STORAGE_AUTO] = "auto", | |
79 | [STORAGE_VOLATILE] = "volatile", | |
80 | [STORAGE_PERSISTENT] = "persistent", | |
81 | [STORAGE_NONE] = "none" | |
82 | }; | |
83 | ||
84 | DEFINE_STRING_TABLE_LOOKUP(storage, Storage); | |
85 | DEFINE_CONFIG_PARSE_ENUM(config_parse_storage, storage, Storage, "Failed to parse storage setting"); | |
86 | ||
87 | static const char* const split_mode_table[] = { | |
88 | [SPLIT_NONE] = "none", | |
89 | [SPLIT_UID] = "uid", | |
90 | [SPLIT_LOGIN] = "login" | |
91 | }; | |
92 | ||
93 | DEFINE_STRING_TABLE_LOOKUP(split_mode, SplitMode); | |
94 | DEFINE_CONFIG_PARSE_ENUM(config_parse_split_mode, split_mode, SplitMode, "Failed to parse split mode setting"); | |
95 | ||
96 | static uint64_t available_space(Server *s) { | |
db91ea32 ZJS |
97 | char ids[33]; |
98 | char _cleanup_free_ *p = NULL; | |
d025f1e4 ZJS |
99 | const char *f; |
100 | sd_id128_t machine; | |
101 | struct statvfs ss; | |
102 | uint64_t sum = 0, avail = 0, ss_avail = 0; | |
103 | int r; | |
db91ea32 | 104 | DIR _cleanup_closedir_ *d = NULL; |
d025f1e4 ZJS |
105 | usec_t ts; |
106 | JournalMetrics *m; | |
107 | ||
108 | ts = now(CLOCK_MONOTONIC); | |
109 | ||
110 | if (s->cached_available_space_timestamp + RECHECK_AVAILABLE_SPACE_USEC > ts) | |
111 | return s->cached_available_space; | |
112 | ||
113 | r = sd_id128_get_machine(&machine); | |
114 | if (r < 0) | |
115 | return 0; | |
116 | ||
117 | if (s->system_journal) { | |
118 | f = "/var/log/journal/"; | |
119 | m = &s->system_metrics; | |
120 | } else { | |
121 | f = "/run/log/journal/"; | |
122 | m = &s->runtime_metrics; | |
123 | } | |
124 | ||
125 | assert(m); | |
126 | ||
127 | p = strappend(f, sd_id128_to_string(machine, ids)); | |
128 | if (!p) | |
129 | return 0; | |
130 | ||
131 | d = opendir(p); | |
d025f1e4 ZJS |
132 | if (!d) |
133 | return 0; | |
134 | ||
135 | if (fstatvfs(dirfd(d), &ss) < 0) | |
db91ea32 | 136 | return 0; |
d025f1e4 ZJS |
137 | |
138 | for (;;) { | |
139 | struct stat st; | |
140 | struct dirent *de; | |
141 | union dirent_storage buf; | |
142 | ||
143 | r = readdir_r(d, &buf.de, &de); | |
144 | if (r != 0) | |
145 | break; | |
146 | ||
147 | if (!de) | |
148 | break; | |
149 | ||
150 | if (!endswith(de->d_name, ".journal") && | |
151 | !endswith(de->d_name, ".journal~")) | |
152 | continue; | |
153 | ||
154 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
155 | continue; | |
156 | ||
157 | if (!S_ISREG(st.st_mode)) | |
158 | continue; | |
159 | ||
160 | sum += (uint64_t) st.st_blocks * 512UL; | |
161 | } | |
162 | ||
163 | avail = sum >= m->max_use ? 0 : m->max_use - sum; | |
164 | ||
165 | ss_avail = ss.f_bsize * ss.f_bavail; | |
166 | ||
167 | ss_avail = ss_avail < m->keep_free ? 0 : ss_avail - m->keep_free; | |
168 | ||
169 | if (ss_avail < avail) | |
170 | avail = ss_avail; | |
171 | ||
172 | s->cached_available_space = avail; | |
173 | s->cached_available_space_timestamp = ts; | |
174 | ||
d025f1e4 ZJS |
175 | return avail; |
176 | } | |
177 | ||
178 | static void server_read_file_gid(Server *s) { | |
a24c64f0 | 179 | const char *g = "systemd-journal"; |
d025f1e4 ZJS |
180 | int r; |
181 | ||
182 | assert(s); | |
183 | ||
184 | if (s->file_gid_valid) | |
185 | return; | |
186 | ||
a24c64f0 | 187 | r = get_group_creds(&g, &s->file_gid); |
d025f1e4 | 188 | if (r < 0) |
a24c64f0 | 189 | log_warning("Failed to resolve '%s' group: %s", g, strerror(-r)); |
d025f1e4 ZJS |
190 | |
191 | /* if we couldn't read the gid, then it will be 0, but that's | |
192 | * fine and we shouldn't try to resolve the group again, so | |
193 | * let's just pretend it worked right-away. */ | |
194 | s->file_gid_valid = true; | |
195 | } | |
196 | ||
197 | void server_fix_perms(Server *s, JournalFile *f, uid_t uid) { | |
198 | int r; | |
199 | #ifdef HAVE_ACL | |
200 | acl_t acl; | |
201 | acl_entry_t entry; | |
202 | acl_permset_t permset; | |
203 | #endif | |
204 | ||
205 | assert(f); | |
206 | ||
207 | server_read_file_gid(s); | |
208 | ||
209 | r = fchmod_and_fchown(f->fd, 0640, 0, s->file_gid); | |
210 | if (r < 0) | |
211 | log_warning("Failed to fix access mode/rights on %s, ignoring: %s", f->path, strerror(-r)); | |
212 | ||
213 | #ifdef HAVE_ACL | |
214 | if (uid <= 0) | |
215 | return; | |
216 | ||
217 | acl = acl_get_fd(f->fd); | |
218 | if (!acl) { | |
219 | log_warning("Failed to read ACL on %s, ignoring: %m", f->path); | |
220 | return; | |
221 | } | |
222 | ||
223 | r = acl_find_uid(acl, uid, &entry); | |
224 | if (r <= 0) { | |
225 | ||
226 | if (acl_create_entry(&acl, &entry) < 0 || | |
227 | acl_set_tag_type(entry, ACL_USER) < 0 || | |
228 | acl_set_qualifier(entry, &uid) < 0) { | |
229 | log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); | |
230 | goto finish; | |
231 | } | |
232 | } | |
233 | ||
234 | if (acl_get_permset(entry, &permset) < 0 || | |
235 | acl_add_perm(permset, ACL_READ) < 0 || | |
236 | acl_calc_mask(&acl) < 0) { | |
237 | log_warning("Failed to patch ACL on %s, ignoring: %m", f->path); | |
238 | goto finish; | |
239 | } | |
240 | ||
241 | if (acl_set_fd(f->fd, acl) < 0) | |
242 | log_warning("Failed to set ACL on %s, ignoring: %m", f->path); | |
243 | ||
244 | finish: | |
245 | acl_free(acl); | |
246 | #endif | |
247 | } | |
248 | ||
249 | static JournalFile* find_journal(Server *s, uid_t uid) { | |
250 | char *p; | |
251 | int r; | |
252 | JournalFile *f; | |
253 | sd_id128_t machine; | |
254 | ||
255 | assert(s); | |
256 | ||
257 | /* We split up user logs only on /var, not on /run. If the | |
258 | * runtime file is open, we write to it exclusively, in order | |
259 | * to guarantee proper order as soon as we flush /run to | |
260 | * /var and close the runtime file. */ | |
261 | ||
262 | if (s->runtime_journal) | |
263 | return s->runtime_journal; | |
264 | ||
265 | if (uid <= 0) | |
266 | return s->system_journal; | |
267 | ||
268 | r = sd_id128_get_machine(&machine); | |
269 | if (r < 0) | |
270 | return s->system_journal; | |
271 | ||
272 | f = hashmap_get(s->user_journals, UINT32_TO_PTR(uid)); | |
273 | if (f) | |
274 | return f; | |
275 | ||
276 | if (asprintf(&p, "/var/log/journal/" SD_ID128_FORMAT_STR "/user-%lu.journal", | |
277 | SD_ID128_FORMAT_VAL(machine), (unsigned long) uid) < 0) | |
278 | return s->system_journal; | |
279 | ||
280 | while (hashmap_size(s->user_journals) >= USER_JOURNALS_MAX) { | |
281 | /* Too many open? Then let's close one */ | |
282 | f = hashmap_steal_first(s->user_journals); | |
283 | assert(f); | |
284 | journal_file_close(f); | |
285 | } | |
286 | ||
287 | r = journal_file_open_reliably(p, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, s->system_journal, &f); | |
288 | free(p); | |
289 | ||
290 | if (r < 0) | |
291 | return s->system_journal; | |
292 | ||
293 | server_fix_perms(s, f, uid); | |
294 | ||
295 | r = hashmap_put(s->user_journals, UINT32_TO_PTR(uid), f); | |
296 | if (r < 0) { | |
297 | journal_file_close(f); | |
298 | return s->system_journal; | |
299 | } | |
300 | ||
301 | return f; | |
302 | } | |
303 | ||
304 | void server_rotate(Server *s) { | |
305 | JournalFile *f; | |
306 | void *k; | |
307 | Iterator i; | |
308 | int r; | |
309 | ||
310 | log_debug("Rotating..."); | |
311 | ||
312 | if (s->runtime_journal) { | |
313 | r = journal_file_rotate(&s->runtime_journal, s->compress, false); | |
314 | if (r < 0) | |
315 | if (s->runtime_journal) | |
316 | log_error("Failed to rotate %s: %s", s->runtime_journal->path, strerror(-r)); | |
317 | else | |
318 | log_error("Failed to create new runtime journal: %s", strerror(-r)); | |
319 | else | |
320 | server_fix_perms(s, s->runtime_journal, 0); | |
321 | } | |
322 | ||
323 | if (s->system_journal) { | |
324 | r = journal_file_rotate(&s->system_journal, s->compress, s->seal); | |
325 | if (r < 0) | |
326 | if (s->system_journal) | |
327 | log_error("Failed to rotate %s: %s", s->system_journal->path, strerror(-r)); | |
328 | else | |
329 | log_error("Failed to create new system journal: %s", strerror(-r)); | |
330 | ||
331 | else | |
332 | server_fix_perms(s, s->system_journal, 0); | |
333 | } | |
334 | ||
335 | HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { | |
336 | r = journal_file_rotate(&f, s->compress, s->seal); | |
337 | if (r < 0) | |
7d73c134 | 338 | if (f) |
d025f1e4 ZJS |
339 | log_error("Failed to rotate %s: %s", f->path, strerror(-r)); |
340 | else | |
341 | log_error("Failed to create user journal: %s", strerror(-r)); | |
342 | else { | |
343 | hashmap_replace(s->user_journals, k, f); | |
344 | server_fix_perms(s, f, PTR_TO_UINT32(k)); | |
345 | } | |
346 | } | |
347 | } | |
348 | ||
26687bf8 OS |
349 | void server_sync(Server *s) { |
350 | JournalFile *f; | |
351 | void *k; | |
352 | Iterator i; | |
353 | int r; | |
354 | ||
355 | static const struct itimerspec sync_timer_disable = {}; | |
356 | ||
357 | if (s->system_journal) { | |
358 | r = journal_file_set_offline(s->system_journal); | |
359 | if (r < 0) | |
360 | log_error("Failed to sync system journal: %s", strerror(-r)); | |
361 | } | |
362 | ||
363 | HASHMAP_FOREACH_KEY(f, k, s->user_journals, i) { | |
364 | r = journal_file_set_offline(f); | |
365 | if (r < 0) | |
366 | log_error("Failed to sync user journal: %s", strerror(-r)); | |
367 | } | |
368 | ||
369 | r = timerfd_settime(s->sync_timer_fd, 0, &sync_timer_disable, NULL); | |
370 | if (r < 0) | |
371 | log_error("Failed to disable max timer: %m"); | |
372 | ||
373 | s->sync_scheduled = false; | |
374 | } | |
375 | ||
d025f1e4 ZJS |
376 | void server_vacuum(Server *s) { |
377 | char *p; | |
378 | char ids[33]; | |
379 | sd_id128_t machine; | |
380 | int r; | |
381 | ||
382 | log_debug("Vacuuming..."); | |
383 | ||
384 | s->oldest_file_usec = 0; | |
385 | ||
386 | r = sd_id128_get_machine(&machine); | |
387 | if (r < 0) { | |
388 | log_error("Failed to get machine ID: %s", strerror(-r)); | |
389 | return; | |
390 | } | |
391 | ||
392 | sd_id128_to_string(machine, ids); | |
393 | ||
394 | if (s->system_journal) { | |
395 | p = strappend("/var/log/journal/", ids); | |
396 | if (!p) { | |
397 | log_oom(); | |
398 | return; | |
399 | } | |
400 | ||
401 | r = journal_directory_vacuum(p, s->system_metrics.max_use, s->system_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec); | |
402 | if (r < 0 && r != -ENOENT) | |
403 | log_error("Failed to vacuum %s: %s", p, strerror(-r)); | |
404 | free(p); | |
405 | } | |
406 | ||
407 | if (s->runtime_journal) { | |
408 | p = strappend("/run/log/journal/", ids); | |
409 | if (!p) { | |
410 | log_oom(); | |
411 | return; | |
412 | } | |
413 | ||
414 | r = journal_directory_vacuum(p, s->runtime_metrics.max_use, s->runtime_metrics.keep_free, s->max_retention_usec, &s->oldest_file_usec); | |
415 | if (r < 0 && r != -ENOENT) | |
416 | log_error("Failed to vacuum %s: %s", p, strerror(-r)); | |
417 | free(p); | |
418 | } | |
419 | ||
420 | s->cached_available_space_timestamp = 0; | |
421 | } | |
422 | ||
423 | static char *shortened_cgroup_path(pid_t pid) { | |
424 | int r; | |
db91ea32 ZJS |
425 | char _cleanup_free_ *process_path = NULL, *init_path = NULL; |
426 | char *path; | |
d025f1e4 ZJS |
427 | |
428 | assert(pid > 0); | |
429 | ||
430 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &process_path); | |
431 | if (r < 0) | |
432 | return NULL; | |
433 | ||
434 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &init_path); | |
db91ea32 | 435 | if (r < 0) |
d025f1e4 | 436 | return NULL; |
d025f1e4 ZJS |
437 | |
438 | if (endswith(init_path, "/system")) | |
439 | init_path[strlen(init_path) - 7] = 0; | |
440 | else if (streq(init_path, "/")) | |
441 | init_path[0] = 0; | |
442 | ||
443 | if (startswith(process_path, init_path)) { | |
db91ea32 | 444 | path = strdup(process_path + strlen(init_path)); |
d025f1e4 ZJS |
445 | } else { |
446 | path = process_path; | |
447 | process_path = NULL; | |
448 | } | |
449 | ||
d025f1e4 ZJS |
450 | return path; |
451 | } | |
452 | ||
453 | bool shall_try_append_again(JournalFile *f, int r) { | |
454 | ||
455 | /* -E2BIG Hit configured limit | |
456 | -EFBIG Hit fs limit | |
457 | -EDQUOT Quota limit hit | |
458 | -ENOSPC Disk full | |
459 | -EHOSTDOWN Other machine | |
460 | -EBUSY Unclean shutdown | |
461 | -EPROTONOSUPPORT Unsupported feature | |
462 | -EBADMSG Corrupted | |
463 | -ENODATA Truncated | |
464 | -ESHUTDOWN Already archived */ | |
465 | ||
466 | if (r == -E2BIG || r == -EFBIG || r == -EDQUOT || r == -ENOSPC) | |
467 | log_debug("%s: Allocation limit reached, rotating.", f->path); | |
468 | else if (r == -EHOSTDOWN) | |
469 | log_info("%s: Journal file from other machine, rotating.", f->path); | |
470 | else if (r == -EBUSY) | |
471 | log_info("%s: Unclean shutdown, rotating.", f->path); | |
472 | else if (r == -EPROTONOSUPPORT) | |
473 | log_info("%s: Unsupported feature, rotating.", f->path); | |
474 | else if (r == -EBADMSG || r == -ENODATA || r == ESHUTDOWN) | |
475 | log_warning("%s: Journal file corrupted, rotating.", f->path); | |
476 | else | |
477 | return false; | |
478 | ||
479 | return true; | |
480 | } | |
481 | ||
482 | static void write_to_journal(Server *s, uid_t uid, struct iovec *iovec, unsigned n) { | |
483 | JournalFile *f; | |
484 | bool vacuumed = false; | |
485 | int r; | |
486 | ||
487 | assert(s); | |
488 | assert(iovec); | |
489 | assert(n > 0); | |
490 | ||
491 | f = find_journal(s, uid); | |
492 | if (!f) | |
493 | return; | |
494 | ||
495 | if (journal_file_rotate_suggested(f, s->max_file_usec)) { | |
496 | log_debug("%s: Journal header limits reached or header out-of-date, rotating.", f->path); | |
497 | server_rotate(s); | |
498 | server_vacuum(s); | |
499 | vacuumed = true; | |
500 | ||
501 | f = find_journal(s, uid); | |
502 | if (!f) | |
503 | return; | |
504 | } | |
505 | ||
506 | r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL); | |
26687bf8 OS |
507 | if (r >= 0) { |
508 | server_schedule_sync(s); | |
d025f1e4 | 509 | return; |
26687bf8 | 510 | } |
d025f1e4 ZJS |
511 | |
512 | if (vacuumed || !shall_try_append_again(f, r)) { | |
513 | log_error("Failed to write entry, ignoring: %s", strerror(-r)); | |
514 | return; | |
515 | } | |
516 | ||
517 | server_rotate(s); | |
518 | server_vacuum(s); | |
519 | ||
520 | f = find_journal(s, uid); | |
521 | if (!f) | |
522 | return; | |
523 | ||
524 | log_debug("Retrying write."); | |
525 | r = journal_file_append_entry(f, NULL, iovec, n, &s->seqnum, NULL, NULL); | |
526 | if (r < 0) | |
527 | log_error("Failed to write entry, ignoring: %s", strerror(-r)); | |
528 | } | |
529 | ||
530 | static void dispatch_message_real( | |
531 | Server *s, | |
532 | struct iovec *iovec, unsigned n, unsigned m, | |
533 | struct ucred *ucred, | |
534 | struct timeval *tv, | |
535 | const char *label, size_t label_len, | |
536 | const char *unit_id) { | |
537 | ||
c2457105 HHPF |
538 | char pid[sizeof("_PID=") + DECIMAL_STR_MAX(ucred->pid)], |
539 | uid[sizeof("_UID=") + DECIMAL_STR_MAX(ucred->uid)], | |
a5693989 | 540 | gid[sizeof("_GID=") + DECIMAL_STR_MAX(ucred->gid)], |
adb435bb LP |
541 | source_time[sizeof("_SOURCE_REALTIME_TIMESTAMP=" + DECIMAL_STR_MAX(usec_t))], |
542 | boot_id[sizeof("_BOOT_ID=") + 32] = "_BOOT_ID=", | |
543 | machine_id[sizeof("_MACHINE_ID=") + 32] = "_MACHINE_ID="; | |
c2457105 | 544 | |
adb435bb | 545 | char _cleanup_free_ *comm = NULL, *cmdline = NULL, *hostname = NULL, |
d025f1e4 ZJS |
546 | *audit_session = NULL, *audit_loginuid = NULL, |
547 | *exe = NULL, *cgroup = NULL, *session = NULL, | |
548 | *owner_uid = NULL, *unit = NULL, *selinux_context = NULL; | |
549 | ||
d025f1e4 ZJS |
550 | sd_id128_t id; |
551 | int r; | |
552 | char *t; | |
82499507 LP |
553 | uid_t realuid = 0, owner = 0, journal_uid; |
554 | bool owner_valid = false; | |
d025f1e4 ZJS |
555 | |
556 | assert(s); | |
557 | assert(iovec); | |
558 | assert(n > 0); | |
559 | assert(n + N_IOVEC_META_FIELDS <= m); | |
560 | ||
561 | if (ucred) { | |
0a20e3c1 | 562 | #ifdef HAVE_AUDIT |
d025f1e4 | 563 | uint32_t audit; |
82499507 | 564 | uid_t loginuid; |
0a20e3c1 | 565 | #endif |
d025f1e4 ZJS |
566 | |
567 | realuid = ucred->uid; | |
568 | ||
c2457105 HHPF |
569 | snprintf(pid, sizeof(pid) - 1, "_PID=%lu", (unsigned long) ucred->pid); |
570 | char_array_0(pid); | |
571 | IOVEC_SET_STRING(iovec[n++], pid); | |
d025f1e4 | 572 | |
c2457105 HHPF |
573 | snprintf(uid, sizeof(uid) - 1, "_UID=%lu", (unsigned long) ucred->uid); |
574 | char_array_0(uid); | |
575 | IOVEC_SET_STRING(iovec[n++], uid); | |
d025f1e4 | 576 | |
c2457105 HHPF |
577 | snprintf(gid, sizeof(gid) - 1, "_GID=%lu", (unsigned long) ucred->gid); |
578 | char_array_0(gid); | |
579 | IOVEC_SET_STRING(iovec[n++], gid); | |
d025f1e4 ZJS |
580 | |
581 | r = get_process_comm(ucred->pid, &t); | |
582 | if (r >= 0) { | |
583 | comm = strappend("_COMM=", t); | |
584 | free(t); | |
585 | ||
586 | if (comm) | |
587 | IOVEC_SET_STRING(iovec[n++], comm); | |
588 | } | |
589 | ||
590 | r = get_process_exe(ucred->pid, &t); | |
591 | if (r >= 0) { | |
592 | exe = strappend("_EXE=", t); | |
593 | free(t); | |
594 | ||
595 | if (exe) | |
596 | IOVEC_SET_STRING(iovec[n++], exe); | |
597 | } | |
598 | ||
9bdbc2e2 | 599 | r = get_process_cmdline(ucred->pid, 0, false, &t); |
d025f1e4 ZJS |
600 | if (r >= 0) { |
601 | cmdline = strappend("_CMDLINE=", t); | |
602 | free(t); | |
603 | ||
604 | if (cmdline) | |
605 | IOVEC_SET_STRING(iovec[n++], cmdline); | |
606 | } | |
607 | ||
0a20e3c1 | 608 | #ifdef HAVE_AUDIT |
d025f1e4 ZJS |
609 | r = audit_session_from_pid(ucred->pid, &audit); |
610 | if (r >= 0) | |
611 | if (asprintf(&audit_session, "_AUDIT_SESSION=%lu", (unsigned long) audit) >= 0) | |
612 | IOVEC_SET_STRING(iovec[n++], audit_session); | |
613 | ||
614 | r = audit_loginuid_from_pid(ucred->pid, &loginuid); | |
82499507 | 615 | if (r >= 0) |
d025f1e4 ZJS |
616 | if (asprintf(&audit_loginuid, "_AUDIT_LOGINUID=%lu", (unsigned long) loginuid) >= 0) |
617 | IOVEC_SET_STRING(iovec[n++], audit_loginuid); | |
0a20e3c1 | 618 | #endif |
d025f1e4 ZJS |
619 | |
620 | t = shortened_cgroup_path(ucred->pid); | |
621 | if (t) { | |
622 | cgroup = strappend("_SYSTEMD_CGROUP=", t); | |
623 | free(t); | |
624 | ||
625 | if (cgroup) | |
626 | IOVEC_SET_STRING(iovec[n++], cgroup); | |
627 | } | |
628 | ||
629 | #ifdef HAVE_LOGIND | |
630 | if (sd_pid_get_session(ucred->pid, &t) >= 0) { | |
631 | session = strappend("_SYSTEMD_SESSION=", t); | |
632 | free(t); | |
633 | ||
634 | if (session) | |
635 | IOVEC_SET_STRING(iovec[n++], session); | |
636 | } | |
637 | ||
83d7d83b | 638 | if (sd_pid_get_owner_uid(ucred->pid, &owner) >= 0) { |
8a0889df | 639 | owner_valid = true; |
d025f1e4 ZJS |
640 | if (asprintf(&owner_uid, "_SYSTEMD_OWNER_UID=%lu", (unsigned long) owner) >= 0) |
641 | IOVEC_SET_STRING(iovec[n++], owner_uid); | |
8a0889df | 642 | } |
d025f1e4 ZJS |
643 | #endif |
644 | ||
645 | if (cg_pid_get_unit(ucred->pid, &t) >= 0) { | |
646 | unit = strappend("_SYSTEMD_UNIT=", t); | |
647 | free(t); | |
ef1673d1 MT |
648 | } else if (cg_pid_get_user_unit(ucred->pid, &t) >= 0) { |
649 | unit = strappend("_SYSTEMD_USER_UNIT=", t); | |
650 | free(t); | |
651 | } else if (unit_id) { | |
652 | if (session) | |
653 | unit = strappend("_SYSTEMD_USER_UNIT=", unit_id); | |
654 | else | |
655 | unit = strappend("_SYSTEMD_UNIT=", unit_id); | |
656 | } | |
d025f1e4 ZJS |
657 | |
658 | if (unit) | |
659 | IOVEC_SET_STRING(iovec[n++], unit); | |
660 | ||
661 | #ifdef HAVE_SELINUX | |
662 | if (label) { | |
663 | selinux_context = malloc(sizeof("_SELINUX_CONTEXT=") + label_len); | |
664 | if (selinux_context) { | |
fc7b7e2e | 665 | *((char*) mempcpy(stpcpy(selinux_context, "_SELINUX_CONTEXT="), label, label_len)) = 0; |
d025f1e4 ZJS |
666 | IOVEC_SET_STRING(iovec[n++], selinux_context); |
667 | } | |
668 | } else { | |
669 | security_context_t con; | |
670 | ||
671 | if (getpidcon(ucred->pid, &con) >= 0) { | |
672 | selinux_context = strappend("_SELINUX_CONTEXT=", con); | |
673 | if (selinux_context) | |
674 | IOVEC_SET_STRING(iovec[n++], selinux_context); | |
d025f1e4 ZJS |
675 | freecon(con); |
676 | } | |
677 | } | |
678 | #endif | |
679 | } | |
680 | ||
681 | if (tv) { | |
a5693989 LP |
682 | snprintf(source_time, sizeof(source_time) - 1, "_SOURCE_REALTIME_TIMESTAMP=%llu", |
683 | (unsigned long long) timeval_load(tv)); | |
684 | char_array_0(source_time); | |
685 | IOVEC_SET_STRING(iovec[n++], source_time); | |
d025f1e4 ZJS |
686 | } |
687 | ||
688 | /* Note that strictly speaking storing the boot id here is | |
689 | * redundant since the entry includes this in-line | |
690 | * anyway. However, we need this indexed, too. */ | |
691 | r = sd_id128_get_boot(&id); | |
adb435bb LP |
692 | if (r >= 0) { |
693 | sd_id128_to_string(id, boot_id + sizeof("_BOOT_ID=") - 1); | |
694 | IOVEC_SET_STRING(iovec[n++], boot_id); | |
695 | } | |
d025f1e4 ZJS |
696 | |
697 | r = sd_id128_get_machine(&id); | |
adb435bb LP |
698 | if (r >= 0) { |
699 | sd_id128_to_string(id, machine_id + sizeof("_MACHINE_ID") - 1); | |
700 | IOVEC_SET_STRING(iovec[n++], machine_id); | |
701 | } | |
d025f1e4 ZJS |
702 | |
703 | t = gethostname_malloc(); | |
704 | if (t) { | |
705 | hostname = strappend("_HOSTNAME=", t); | |
706 | free(t); | |
707 | if (hostname) | |
708 | IOVEC_SET_STRING(iovec[n++], hostname); | |
709 | } | |
710 | ||
711 | assert(n <= m); | |
712 | ||
da499392 | 713 | if (s->split_mode == SPLIT_UID && realuid > 0) |
40adcda8 | 714 | /* Split up strictly by any UID */ |
759c945a | 715 | journal_uid = realuid; |
82499507 | 716 | else if (s->split_mode == SPLIT_LOGIN && realuid > 0 && owner_valid && owner > 0) |
40adcda8 LP |
717 | /* Split up by login UIDs, this avoids creation of |
718 | * individual journals for system UIDs. We do this | |
719 | * only if the realuid is not root, in order not to | |
82499507 LP |
720 | * accidentally leak privileged information to the |
721 | * user that is logged by a privileged process that is | |
722 | * part of an unprivileged session.*/ | |
8a0889df | 723 | journal_uid = owner; |
da499392 KS |
724 | else |
725 | journal_uid = 0; | |
759c945a CW |
726 | |
727 | write_to_journal(s, journal_uid, iovec, n); | |
d025f1e4 ZJS |
728 | } |
729 | ||
730 | void server_driver_message(Server *s, sd_id128_t message_id, const char *format, ...) { | |
731 | char mid[11 + 32 + 1]; | |
732 | char buffer[16 + LINE_MAX + 1]; | |
733 | struct iovec iovec[N_IOVEC_META_FIELDS + 4]; | |
734 | int n = 0; | |
735 | va_list ap; | |
b92bea5d | 736 | struct ucred ucred = {}; |
d025f1e4 ZJS |
737 | |
738 | assert(s); | |
739 | assert(format); | |
740 | ||
741 | IOVEC_SET_STRING(iovec[n++], "PRIORITY=6"); | |
742 | IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=driver"); | |
743 | ||
744 | memcpy(buffer, "MESSAGE=", 8); | |
745 | va_start(ap, format); | |
746 | vsnprintf(buffer + 8, sizeof(buffer) - 8, format, ap); | |
747 | va_end(ap); | |
748 | char_array_0(buffer); | |
749 | IOVEC_SET_STRING(iovec[n++], buffer); | |
750 | ||
751 | if (!sd_id128_equal(message_id, SD_ID128_NULL)) { | |
752 | snprintf(mid, sizeof(mid), MESSAGE_ID(message_id)); | |
753 | char_array_0(mid); | |
754 | IOVEC_SET_STRING(iovec[n++], mid); | |
755 | } | |
756 | ||
d025f1e4 ZJS |
757 | ucred.pid = getpid(); |
758 | ucred.uid = getuid(); | |
759 | ucred.gid = getgid(); | |
760 | ||
761 | dispatch_message_real(s, iovec, n, ELEMENTSOF(iovec), &ucred, NULL, NULL, 0, NULL); | |
762 | } | |
763 | ||
764 | void server_dispatch_message( | |
765 | Server *s, | |
766 | struct iovec *iovec, unsigned n, unsigned m, | |
767 | struct ucred *ucred, | |
768 | struct timeval *tv, | |
769 | const char *label, size_t label_len, | |
770 | const char *unit_id, | |
771 | int priority) { | |
772 | ||
773 | int rl; | |
db91ea32 ZJS |
774 | char _cleanup_free_ *path = NULL; |
775 | char *c; | |
d025f1e4 ZJS |
776 | |
777 | assert(s); | |
778 | assert(iovec || n == 0); | |
779 | ||
780 | if (n == 0) | |
781 | return; | |
782 | ||
783 | if (LOG_PRI(priority) > s->max_level_store) | |
784 | return; | |
785 | ||
786 | if (!ucred) | |
787 | goto finish; | |
788 | ||
789 | path = shortened_cgroup_path(ucred->pid); | |
790 | if (!path) | |
791 | goto finish; | |
792 | ||
793 | /* example: /user/lennart/3/foobar | |
794 | * /system/dbus.service/foobar | |
795 | * | |
796 | * So let's cut of everything past the third /, since that is | |
797 | * where user directories start */ | |
798 | ||
799 | c = strchr(path, '/'); | |
800 | if (c) { | |
801 | c = strchr(c+1, '/'); | |
802 | if (c) { | |
803 | c = strchr(c+1, '/'); | |
804 | if (c) | |
805 | *c = 0; | |
806 | } | |
807 | } | |
808 | ||
db91ea32 ZJS |
809 | rl = journal_rate_limit_test(s->rate_limit, path, |
810 | priority & LOG_PRIMASK, available_space(s)); | |
d025f1e4 | 811 | |
db91ea32 | 812 | if (rl == 0) |
d025f1e4 | 813 | return; |
d025f1e4 ZJS |
814 | |
815 | /* Write a suppression message if we suppressed something */ | |
816 | if (rl > 1) | |
db91ea32 ZJS |
817 | server_driver_message(s, SD_MESSAGE_JOURNAL_DROPPED, |
818 | "Suppressed %u messages from %s", rl - 1, path); | |
d025f1e4 ZJS |
819 | |
820 | finish: | |
821 | dispatch_message_real(s, iovec, n, m, ucred, tv, label, label_len, unit_id); | |
822 | } | |
823 | ||
824 | ||
825 | static int system_journal_open(Server *s) { | |
826 | int r; | |
827 | char *fn; | |
828 | sd_id128_t machine; | |
829 | char ids[33]; | |
830 | ||
831 | r = sd_id128_get_machine(&machine); | |
832 | if (r < 0) | |
833 | return r; | |
834 | ||
835 | sd_id128_to_string(machine, ids); | |
836 | ||
837 | if (!s->system_journal && | |
838 | (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) && | |
839 | access("/run/systemd/journal/flushed", F_OK) >= 0) { | |
840 | ||
841 | /* If in auto mode: first try to create the machine | |
842 | * path, but not the prefix. | |
843 | * | |
844 | * If in persistent mode: create /var/log/journal and | |
845 | * the machine path */ | |
846 | ||
847 | if (s->storage == STORAGE_PERSISTENT) | |
848 | (void) mkdir("/var/log/journal/", 0755); | |
849 | ||
850 | fn = strappend("/var/log/journal/", ids); | |
851 | if (!fn) | |
852 | return -ENOMEM; | |
853 | ||
854 | (void) mkdir(fn, 0755); | |
855 | free(fn); | |
856 | ||
857 | fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL); | |
858 | if (!fn) | |
859 | return -ENOMEM; | |
860 | ||
861 | r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal); | |
862 | free(fn); | |
863 | ||
864 | if (r >= 0) { | |
865 | char fb[FORMAT_BYTES_MAX]; | |
866 | ||
867 | server_fix_perms(s, s->system_journal, 0); | |
868 | server_driver_message(s, SD_ID128_NULL, "Allowing system journal files to grow to %s.", | |
869 | format_bytes(fb, sizeof(fb), s->system_metrics.max_use)); | |
870 | ||
871 | } else if (r < 0) { | |
872 | ||
873 | if (r != -ENOENT && r != -EROFS) | |
874 | log_warning("Failed to open system journal: %s", strerror(-r)); | |
875 | ||
876 | r = 0; | |
877 | } | |
878 | } | |
879 | ||
880 | if (!s->runtime_journal && | |
881 | (s->storage != STORAGE_NONE)) { | |
882 | ||
883 | fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL); | |
884 | if (!fn) | |
885 | return -ENOMEM; | |
886 | ||
887 | if (s->system_journal) { | |
888 | ||
889 | /* Try to open the runtime journal, but only | |
890 | * if it already exists, so that we can flush | |
891 | * it into the system journal */ | |
892 | ||
893 | r = journal_file_open(fn, O_RDWR, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); | |
894 | free(fn); | |
895 | ||
896 | if (r < 0) { | |
897 | if (r != -ENOENT) | |
898 | log_warning("Failed to open runtime journal: %s", strerror(-r)); | |
899 | ||
900 | r = 0; | |
901 | } | |
902 | ||
903 | } else { | |
904 | ||
905 | /* OK, we really need the runtime journal, so create | |
906 | * it if necessary. */ | |
907 | ||
908 | (void) mkdir_parents(fn, 0755); | |
909 | r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal); | |
910 | free(fn); | |
911 | ||
912 | if (r < 0) { | |
913 | log_error("Failed to open runtime journal: %s", strerror(-r)); | |
914 | return r; | |
915 | } | |
916 | } | |
917 | ||
918 | if (s->runtime_journal) { | |
919 | char fb[FORMAT_BYTES_MAX]; | |
920 | ||
921 | server_fix_perms(s, s->runtime_journal, 0); | |
922 | server_driver_message(s, SD_ID128_NULL, "Allowing runtime journal files to grow to %s.", | |
923 | format_bytes(fb, sizeof(fb), s->runtime_metrics.max_use)); | |
924 | } | |
925 | } | |
926 | ||
927 | return r; | |
928 | } | |
929 | ||
930 | int server_flush_to_var(Server *s) { | |
931 | int r; | |
932 | sd_id128_t machine; | |
933 | sd_journal *j = NULL; | |
934 | ||
935 | assert(s); | |
936 | ||
937 | if (s->storage != STORAGE_AUTO && | |
938 | s->storage != STORAGE_PERSISTENT) | |
939 | return 0; | |
940 | ||
941 | if (!s->runtime_journal) | |
942 | return 0; | |
943 | ||
944 | system_journal_open(s); | |
945 | ||
946 | if (!s->system_journal) | |
947 | return 0; | |
948 | ||
949 | log_debug("Flushing to /var..."); | |
950 | ||
951 | r = sd_id128_get_machine(&machine); | |
952 | if (r < 0) { | |
953 | log_error("Failed to get machine id: %s", strerror(-r)); | |
954 | return r; | |
955 | } | |
956 | ||
957 | r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY); | |
958 | if (r < 0) { | |
959 | log_error("Failed to read runtime journal: %s", strerror(-r)); | |
960 | return r; | |
961 | } | |
962 | ||
93b73b06 LP |
963 | sd_journal_set_data_threshold(j, 0); |
964 | ||
d025f1e4 ZJS |
965 | SD_JOURNAL_FOREACH(j) { |
966 | Object *o = NULL; | |
967 | JournalFile *f; | |
968 | ||
969 | f = j->current_file; | |
970 | assert(f && f->current_offset > 0); | |
971 | ||
972 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); | |
973 | if (r < 0) { | |
974 | log_error("Can't read entry: %s", strerror(-r)); | |
975 | goto finish; | |
976 | } | |
977 | ||
978 | r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL); | |
979 | if (r >= 0) | |
980 | continue; | |
981 | ||
982 | if (!shall_try_append_again(s->system_journal, r)) { | |
983 | log_error("Can't write entry: %s", strerror(-r)); | |
984 | goto finish; | |
985 | } | |
986 | ||
987 | server_rotate(s); | |
988 | server_vacuum(s); | |
989 | ||
990 | log_debug("Retrying write."); | |
991 | r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL); | |
992 | if (r < 0) { | |
993 | log_error("Can't write entry: %s", strerror(-r)); | |
994 | goto finish; | |
995 | } | |
996 | } | |
997 | ||
998 | finish: | |
999 | journal_file_post_change(s->system_journal); | |
1000 | ||
1001 | journal_file_close(s->runtime_journal); | |
1002 | s->runtime_journal = NULL; | |
1003 | ||
1004 | if (r >= 0) | |
1005 | rm_rf("/run/log/journal", false, true, false); | |
1006 | ||
763c7aa2 | 1007 | sd_journal_close(j); |
d025f1e4 ZJS |
1008 | |
1009 | return r; | |
1010 | } | |
1011 | ||
1012 | int process_event(Server *s, struct epoll_event *ev) { | |
1013 | assert(s); | |
1014 | assert(ev); | |
1015 | ||
1016 | if (ev->data.fd == s->signal_fd) { | |
1017 | struct signalfd_siginfo sfsi; | |
1018 | ssize_t n; | |
1019 | ||
1020 | if (ev->events != EPOLLIN) { | |
1021 | log_error("Got invalid event from epoll."); | |
1022 | return -EIO; | |
1023 | } | |
1024 | ||
1025 | n = read(s->signal_fd, &sfsi, sizeof(sfsi)); | |
1026 | if (n != sizeof(sfsi)) { | |
1027 | ||
1028 | if (n >= 0) | |
1029 | return -EIO; | |
1030 | ||
1031 | if (errno == EINTR || errno == EAGAIN) | |
1032 | return 1; | |
1033 | ||
1034 | return -errno; | |
1035 | } | |
1036 | ||
d025f1e4 ZJS |
1037 | if (sfsi.ssi_signo == SIGUSR1) { |
1038 | touch("/run/systemd/journal/flushed"); | |
1039 | server_flush_to_var(s); | |
26687bf8 | 1040 | server_sync(s); |
d025f1e4 ZJS |
1041 | return 1; |
1042 | } | |
1043 | ||
1044 | if (sfsi.ssi_signo == SIGUSR2) { | |
1045 | server_rotate(s); | |
1046 | server_vacuum(s); | |
1047 | return 1; | |
1048 | } | |
1049 | ||
26687bf8 OS |
1050 | log_info("Received SIG%s", signal_to_string(sfsi.ssi_signo)); |
1051 | ||
d025f1e4 ZJS |
1052 | return 0; |
1053 | ||
26687bf8 OS |
1054 | } else if (ev->data.fd == s->sync_timer_fd) { |
1055 | int r; | |
1056 | uint64_t t; | |
1057 | ||
1058 | log_debug("Got sync request from epoll."); | |
1059 | ||
1060 | r = read(ev->data.fd, (void *)&t, sizeof(t)); | |
1061 | if (r < 0) | |
1062 | return 0; | |
1063 | ||
1064 | server_sync(s); | |
1065 | return 1; | |
1066 | ||
d025f1e4 ZJS |
1067 | } else if (ev->data.fd == s->dev_kmsg_fd) { |
1068 | int r; | |
1069 | ||
1070 | if (ev->events != EPOLLIN) { | |
1071 | log_error("Got invalid event from epoll."); | |
1072 | return -EIO; | |
1073 | } | |
1074 | ||
1075 | r = server_read_dev_kmsg(s); | |
1076 | if (r < 0) | |
1077 | return r; | |
1078 | ||
1079 | return 1; | |
1080 | ||
1081 | } else if (ev->data.fd == s->native_fd || | |
1082 | ev->data.fd == s->syslog_fd) { | |
1083 | ||
1084 | if (ev->events != EPOLLIN) { | |
1085 | log_error("Got invalid event from epoll."); | |
1086 | return -EIO; | |
1087 | } | |
1088 | ||
1089 | for (;;) { | |
1090 | struct msghdr msghdr; | |
1091 | struct iovec iovec; | |
1092 | struct ucred *ucred = NULL; | |
1093 | struct timeval *tv = NULL; | |
1094 | struct cmsghdr *cmsg; | |
1095 | char *label = NULL; | |
1096 | size_t label_len = 0; | |
1097 | union { | |
1098 | struct cmsghdr cmsghdr; | |
1099 | ||
1100 | /* We use NAME_MAX space for the | |
1101 | * SELinux label here. The kernel | |
1102 | * currently enforces no limit, but | |
1103 | * according to suggestions from the | |
1104 | * SELinux people this will change and | |
1105 | * it will probably be identical to | |
1106 | * NAME_MAX. For now we use that, but | |
1107 | * this should be updated one day when | |
1108 | * the final limit is known.*/ | |
1109 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + | |
1110 | CMSG_SPACE(sizeof(struct timeval)) + | |
1111 | CMSG_SPACE(sizeof(int)) + /* fd */ | |
1112 | CMSG_SPACE(NAME_MAX)]; /* selinux label */ | |
1113 | } control; | |
1114 | ssize_t n; | |
1115 | int v; | |
1116 | int *fds = NULL; | |
1117 | unsigned n_fds = 0; | |
1118 | ||
1119 | if (ioctl(ev->data.fd, SIOCINQ, &v) < 0) { | |
1120 | log_error("SIOCINQ failed: %m"); | |
1121 | return -errno; | |
1122 | } | |
1123 | ||
1124 | if (s->buffer_size < (size_t) v) { | |
1125 | void *b; | |
1126 | size_t l; | |
1127 | ||
1128 | l = MAX(LINE_MAX + (size_t) v, s->buffer_size * 2); | |
1129 | b = realloc(s->buffer, l+1); | |
1130 | ||
1131 | if (!b) { | |
1132 | log_error("Couldn't increase buffer."); | |
1133 | return -ENOMEM; | |
1134 | } | |
1135 | ||
1136 | s->buffer_size = l; | |
1137 | s->buffer = b; | |
1138 | } | |
1139 | ||
1140 | zero(iovec); | |
1141 | iovec.iov_base = s->buffer; | |
1142 | iovec.iov_len = s->buffer_size; | |
1143 | ||
1144 | zero(control); | |
1145 | zero(msghdr); | |
1146 | msghdr.msg_iov = &iovec; | |
1147 | msghdr.msg_iovlen = 1; | |
1148 | msghdr.msg_control = &control; | |
1149 | msghdr.msg_controllen = sizeof(control); | |
1150 | ||
1151 | n = recvmsg(ev->data.fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); | |
1152 | if (n < 0) { | |
1153 | ||
1154 | if (errno == EINTR || errno == EAGAIN) | |
1155 | return 1; | |
1156 | ||
1157 | log_error("recvmsg() failed: %m"); | |
1158 | return -errno; | |
1159 | } | |
1160 | ||
1161 | for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg; cmsg = CMSG_NXTHDR(&msghdr, cmsg)) { | |
1162 | ||
1163 | if (cmsg->cmsg_level == SOL_SOCKET && | |
1164 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
1165 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
1166 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
1167 | else if (cmsg->cmsg_level == SOL_SOCKET && | |
1168 | cmsg->cmsg_type == SCM_SECURITY) { | |
1169 | label = (char*) CMSG_DATA(cmsg); | |
1170 | label_len = cmsg->cmsg_len - CMSG_LEN(0); | |
1171 | } else if (cmsg->cmsg_level == SOL_SOCKET && | |
1172 | cmsg->cmsg_type == SO_TIMESTAMP && | |
1173 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct timeval))) | |
1174 | tv = (struct timeval*) CMSG_DATA(cmsg); | |
1175 | else if (cmsg->cmsg_level == SOL_SOCKET && | |
1176 | cmsg->cmsg_type == SCM_RIGHTS) { | |
1177 | fds = (int*) CMSG_DATA(cmsg); | |
1178 | n_fds = (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int); | |
1179 | } | |
1180 | } | |
1181 | ||
1182 | if (ev->data.fd == s->syslog_fd) { | |
1183 | char *e; | |
1184 | ||
1185 | if (n > 0 && n_fds == 0) { | |
1186 | e = memchr(s->buffer, '\n', n); | |
1187 | if (e) | |
1188 | *e = 0; | |
1189 | else | |
1190 | s->buffer[n] = 0; | |
1191 | ||
1192 | server_process_syslog_message(s, strstrip(s->buffer), ucred, tv, label, label_len); | |
1193 | } else if (n_fds > 0) | |
1194 | log_warning("Got file descriptors via syslog socket. Ignoring."); | |
1195 | ||
1196 | } else { | |
1197 | if (n > 0 && n_fds == 0) | |
1198 | server_process_native_message(s, s->buffer, n, ucred, tv, label, label_len); | |
1199 | else if (n == 0 && n_fds == 1) | |
1200 | server_process_native_file(s, fds[0], ucred, tv, label, label_len); | |
1201 | else if (n_fds > 0) | |
1202 | log_warning("Got too many file descriptors via native socket. Ignoring."); | |
1203 | } | |
1204 | ||
1205 | close_many(fds, n_fds); | |
1206 | } | |
1207 | ||
1208 | return 1; | |
1209 | ||
1210 | } else if (ev->data.fd == s->stdout_fd) { | |
1211 | ||
1212 | if (ev->events != EPOLLIN) { | |
1213 | log_error("Got invalid event from epoll."); | |
1214 | return -EIO; | |
1215 | } | |
1216 | ||
1217 | stdout_stream_new(s); | |
1218 | return 1; | |
1219 | ||
1220 | } else { | |
1221 | StdoutStream *stream; | |
1222 | ||
1223 | if ((ev->events|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) { | |
1224 | log_error("Got invalid event from epoll."); | |
1225 | return -EIO; | |
1226 | } | |
1227 | ||
1228 | /* If it is none of the well-known fds, it must be an | |
1229 | * stdout stream fd. Note that this is a bit ugly here | |
1230 | * (since we rely that none of the well-known fds | |
1231 | * could be interpreted as pointer), but nonetheless | |
1232 | * safe, since the well-known fds would never get an | |
1233 | * fd > 4096, i.e. beyond the first memory page */ | |
1234 | ||
1235 | stream = ev->data.ptr; | |
1236 | ||
1237 | if (stdout_stream_process(stream) <= 0) | |
1238 | stdout_stream_free(stream); | |
1239 | ||
1240 | return 1; | |
1241 | } | |
1242 | ||
1243 | log_error("Unknown event."); | |
1244 | return 0; | |
1245 | } | |
1246 | ||
1247 | static int open_signalfd(Server *s) { | |
1248 | sigset_t mask; | |
1249 | struct epoll_event ev; | |
1250 | ||
1251 | assert(s); | |
1252 | ||
1253 | assert_se(sigemptyset(&mask) == 0); | |
1254 | sigset_add_many(&mask, SIGINT, SIGTERM, SIGUSR1, SIGUSR2, -1); | |
1255 | assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); | |
1256 | ||
1257 | s->signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC); | |
1258 | if (s->signal_fd < 0) { | |
1259 | log_error("signalfd(): %m"); | |
1260 | return -errno; | |
1261 | } | |
1262 | ||
1263 | zero(ev); | |
1264 | ev.events = EPOLLIN; | |
1265 | ev.data.fd = s->signal_fd; | |
1266 | ||
1267 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->signal_fd, &ev) < 0) { | |
1268 | log_error("epoll_ctl(): %m"); | |
1269 | return -errno; | |
1270 | } | |
1271 | ||
1272 | return 0; | |
1273 | } | |
1274 | ||
1275 | static int server_parse_proc_cmdline(Server *s) { | |
db91ea32 ZJS |
1276 | char _cleanup_free_ *line = NULL; |
1277 | char *w, *state; | |
d025f1e4 ZJS |
1278 | int r; |
1279 | size_t l; | |
1280 | ||
1281 | if (detect_container(NULL) > 0) | |
1282 | return 0; | |
1283 | ||
1284 | r = read_one_line_file("/proc/cmdline", &line); | |
1285 | if (r < 0) { | |
1286 | log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); | |
1287 | return 0; | |
1288 | } | |
1289 | ||
1290 | FOREACH_WORD_QUOTED(w, l, line, state) { | |
db91ea32 | 1291 | char _cleanup_free_ *word; |
d025f1e4 ZJS |
1292 | |
1293 | word = strndup(w, l); | |
db91ea32 ZJS |
1294 | if (!word) |
1295 | return -ENOMEM; | |
d025f1e4 ZJS |
1296 | |
1297 | if (startswith(word, "systemd.journald.forward_to_syslog=")) { | |
1298 | r = parse_boolean(word + 35); | |
1299 | if (r < 0) | |
1300 | log_warning("Failed to parse forward to syslog switch %s. Ignoring.", word + 35); | |
1301 | else | |
1302 | s->forward_to_syslog = r; | |
1303 | } else if (startswith(word, "systemd.journald.forward_to_kmsg=")) { | |
1304 | r = parse_boolean(word + 33); | |
1305 | if (r < 0) | |
1306 | log_warning("Failed to parse forward to kmsg switch %s. Ignoring.", word + 33); | |
1307 | else | |
1308 | s->forward_to_kmsg = r; | |
1309 | } else if (startswith(word, "systemd.journald.forward_to_console=")) { | |
1310 | r = parse_boolean(word + 36); | |
1311 | if (r < 0) | |
1312 | log_warning("Failed to parse forward to console switch %s. Ignoring.", word + 36); | |
1313 | else | |
1314 | s->forward_to_console = r; | |
1315 | } else if (startswith(word, "systemd.journald")) | |
1316 | log_warning("Invalid systemd.journald parameter. Ignoring."); | |
d025f1e4 ZJS |
1317 | } |
1318 | ||
db91ea32 | 1319 | return 0; |
d025f1e4 ZJS |
1320 | } |
1321 | ||
1322 | static int server_parse_config_file(Server *s) { | |
db91ea32 ZJS |
1323 | static const char *fn = "/etc/systemd/journald.conf"; |
1324 | FILE _cleanup_fclose_ *f = NULL; | |
d025f1e4 ZJS |
1325 | int r; |
1326 | ||
1327 | assert(s); | |
1328 | ||
d025f1e4 ZJS |
1329 | f = fopen(fn, "re"); |
1330 | if (!f) { | |
1331 | if (errno == ENOENT) | |
1332 | return 0; | |
1333 | ||
1334 | log_warning("Failed to open configuration file %s: %m", fn); | |
1335 | return -errno; | |
1336 | } | |
1337 | ||
db91ea32 ZJS |
1338 | r = config_parse(fn, f, "Journal\0", config_item_perf_lookup, |
1339 | (void*) journald_gperf_lookup, false, s); | |
d025f1e4 ZJS |
1340 | if (r < 0) |
1341 | log_warning("Failed to parse configuration file: %s", strerror(-r)); | |
1342 | ||
d025f1e4 ZJS |
1343 | return r; |
1344 | } | |
1345 | ||
26687bf8 OS |
1346 | static int server_open_sync_timer(Server *s) { |
1347 | int r; | |
1348 | struct epoll_event ev; | |
1349 | ||
1350 | assert(s); | |
1351 | ||
1352 | s->sync_timer_fd = timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC); | |
1353 | if (s->sync_timer_fd < 0) | |
1354 | return -errno; | |
1355 | ||
1356 | zero(ev); | |
1357 | ev.events = EPOLLIN; | |
1358 | ev.data.fd = s->sync_timer_fd; | |
1359 | ||
1360 | r = epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->sync_timer_fd, &ev); | |
1361 | if (r < 0) { | |
1362 | log_error("Failed to add idle timer fd to epoll object: %m"); | |
1363 | return -errno; | |
1364 | } | |
1365 | ||
1366 | return 0; | |
1367 | } | |
1368 | ||
1369 | int server_schedule_sync(Server *s) { | |
1370 | int r; | |
1371 | ||
26687bf8 OS |
1372 | assert(s); |
1373 | ||
1374 | if (s->sync_scheduled) | |
1375 | return 0; | |
1376 | ||
1377 | if (s->sync_interval_usec) { | |
b92bea5d ZJS |
1378 | struct itimerspec sync_timer_enable = { |
1379 | .it_value.tv_sec = s->sync_interval_usec / USEC_PER_SEC, | |
1380 | .it_value.tv_nsec = s->sync_interval_usec % MSEC_PER_SEC, | |
1381 | }; | |
26687bf8 OS |
1382 | |
1383 | r = timerfd_settime(s->sync_timer_fd, 0, &sync_timer_enable, NULL); | |
1384 | if (r < 0) | |
1385 | return -errno; | |
1386 | } | |
1387 | ||
1388 | s->sync_scheduled = true; | |
1389 | ||
1390 | return 0; | |
1391 | } | |
1392 | ||
d025f1e4 ZJS |
1393 | int server_init(Server *s) { |
1394 | int n, r, fd; | |
1395 | ||
1396 | assert(s); | |
1397 | ||
1398 | zero(*s); | |
26687bf8 OS |
1399 | s->sync_timer_fd = s->syslog_fd = s->native_fd = s->stdout_fd = |
1400 | s->signal_fd = s->epoll_fd = s->dev_kmsg_fd = -1; | |
d025f1e4 ZJS |
1401 | s->compress = true; |
1402 | s->seal = true; | |
1403 | ||
26687bf8 OS |
1404 | s->sync_interval_usec = DEFAULT_SYNC_INTERVAL_USEC; |
1405 | s->sync_scheduled = false; | |
1406 | ||
d025f1e4 ZJS |
1407 | s->rate_limit_interval = DEFAULT_RATE_LIMIT_INTERVAL; |
1408 | s->rate_limit_burst = DEFAULT_RATE_LIMIT_BURST; | |
1409 | ||
1410 | s->forward_to_syslog = true; | |
1411 | ||
1412 | s->max_level_store = LOG_DEBUG; | |
1413 | s->max_level_syslog = LOG_DEBUG; | |
1414 | s->max_level_kmsg = LOG_NOTICE; | |
1415 | s->max_level_console = LOG_INFO; | |
1416 | ||
1417 | memset(&s->system_metrics, 0xFF, sizeof(s->system_metrics)); | |
1418 | memset(&s->runtime_metrics, 0xFF, sizeof(s->runtime_metrics)); | |
1419 | ||
1420 | server_parse_config_file(s); | |
1421 | server_parse_proc_cmdline(s); | |
d288f79f ZJS |
1422 | if (!!s->rate_limit_interval ^ !!s->rate_limit_burst) { |
1423 | log_debug("Setting both rate limit interval and burst from %llu,%u to 0,0", | |
1424 | (long long unsigned) s->rate_limit_interval, | |
1425 | s->rate_limit_burst); | |
1426 | s->rate_limit_interval = s->rate_limit_burst = 0; | |
1427 | } | |
d025f1e4 ZJS |
1428 | |
1429 | mkdir_p("/run/systemd/journal", 0755); | |
1430 | ||
1431 | s->user_journals = hashmap_new(trivial_hash_func, trivial_compare_func); | |
1432 | if (!s->user_journals) | |
1433 | return log_oom(); | |
1434 | ||
1435 | s->mmap = mmap_cache_new(); | |
1436 | if (!s->mmap) | |
1437 | return log_oom(); | |
1438 | ||
1439 | s->epoll_fd = epoll_create1(EPOLL_CLOEXEC); | |
1440 | if (s->epoll_fd < 0) { | |
1441 | log_error("Failed to create epoll object: %m"); | |
1442 | return -errno; | |
1443 | } | |
1444 | ||
1445 | n = sd_listen_fds(true); | |
1446 | if (n < 0) { | |
1447 | log_error("Failed to read listening file descriptors from environment: %s", strerror(-n)); | |
1448 | return n; | |
1449 | } | |
1450 | ||
1451 | for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + n; fd++) { | |
1452 | ||
1453 | if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/run/systemd/journal/socket", 0) > 0) { | |
1454 | ||
1455 | if (s->native_fd >= 0) { | |
1456 | log_error("Too many native sockets passed."); | |
1457 | return -EINVAL; | |
1458 | } | |
1459 | ||
1460 | s->native_fd = fd; | |
1461 | ||
1462 | } else if (sd_is_socket_unix(fd, SOCK_STREAM, 1, "/run/systemd/journal/stdout", 0) > 0) { | |
1463 | ||
1464 | if (s->stdout_fd >= 0) { | |
1465 | log_error("Too many stdout sockets passed."); | |
1466 | return -EINVAL; | |
1467 | } | |
1468 | ||
1469 | s->stdout_fd = fd; | |
1470 | ||
1471 | } else if (sd_is_socket_unix(fd, SOCK_DGRAM, -1, "/dev/log", 0) > 0) { | |
1472 | ||
1473 | if (s->syslog_fd >= 0) { | |
1474 | log_error("Too many /dev/log sockets passed."); | |
1475 | return -EINVAL; | |
1476 | } | |
1477 | ||
1478 | s->syslog_fd = fd; | |
1479 | ||
1480 | } else { | |
1481 | log_error("Unknown socket passed."); | |
1482 | return -EINVAL; | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | r = server_open_syslog_socket(s); | |
1487 | if (r < 0) | |
1488 | return r; | |
1489 | ||
1490 | r = server_open_native_socket(s); | |
1491 | if (r < 0) | |
1492 | return r; | |
1493 | ||
1494 | r = server_open_stdout_socket(s); | |
1495 | if (r < 0) | |
1496 | return r; | |
1497 | ||
1498 | r = server_open_dev_kmsg(s); | |
1499 | if (r < 0) | |
1500 | return r; | |
1501 | ||
1502 | r = server_open_kernel_seqnum(s); | |
1503 | if (r < 0) | |
1504 | return r; | |
1505 | ||
26687bf8 OS |
1506 | r = server_open_sync_timer(s); |
1507 | if (r < 0) | |
1508 | return r; | |
1509 | ||
d025f1e4 ZJS |
1510 | r = open_signalfd(s); |
1511 | if (r < 0) | |
1512 | return r; | |
1513 | ||
1514 | s->udev = udev_new(); | |
1515 | if (!s->udev) | |
1516 | return -ENOMEM; | |
1517 | ||
d288f79f ZJS |
1518 | s->rate_limit = journal_rate_limit_new(s->rate_limit_interval, |
1519 | s->rate_limit_burst); | |
d025f1e4 ZJS |
1520 | if (!s->rate_limit) |
1521 | return -ENOMEM; | |
1522 | ||
1523 | r = system_journal_open(s); | |
1524 | if (r < 0) | |
1525 | return r; | |
1526 | ||
1527 | return 0; | |
1528 | } | |
1529 | ||
1530 | void server_maybe_append_tags(Server *s) { | |
1531 | #ifdef HAVE_GCRYPT | |
1532 | JournalFile *f; | |
1533 | Iterator i; | |
1534 | usec_t n; | |
1535 | ||
1536 | n = now(CLOCK_REALTIME); | |
1537 | ||
1538 | if (s->system_journal) | |
1539 | journal_file_maybe_append_tag(s->system_journal, n); | |
1540 | ||
1541 | HASHMAP_FOREACH(f, s->user_journals, i) | |
1542 | journal_file_maybe_append_tag(f, n); | |
1543 | #endif | |
1544 | } | |
1545 | ||
1546 | void server_done(Server *s) { | |
1547 | JournalFile *f; | |
1548 | assert(s); | |
1549 | ||
1550 | while (s->stdout_streams) | |
1551 | stdout_stream_free(s->stdout_streams); | |
1552 | ||
1553 | if (s->system_journal) | |
1554 | journal_file_close(s->system_journal); | |
1555 | ||
1556 | if (s->runtime_journal) | |
1557 | journal_file_close(s->runtime_journal); | |
1558 | ||
1559 | while ((f = hashmap_steal_first(s->user_journals))) | |
1560 | journal_file_close(f); | |
1561 | ||
1562 | hashmap_free(s->user_journals); | |
1563 | ||
1564 | if (s->epoll_fd >= 0) | |
1565 | close_nointr_nofail(s->epoll_fd); | |
1566 | ||
1567 | if (s->signal_fd >= 0) | |
1568 | close_nointr_nofail(s->signal_fd); | |
1569 | ||
1570 | if (s->syslog_fd >= 0) | |
1571 | close_nointr_nofail(s->syslog_fd); | |
1572 | ||
1573 | if (s->native_fd >= 0) | |
1574 | close_nointr_nofail(s->native_fd); | |
1575 | ||
1576 | if (s->stdout_fd >= 0) | |
1577 | close_nointr_nofail(s->stdout_fd); | |
1578 | ||
1579 | if (s->dev_kmsg_fd >= 0) | |
1580 | close_nointr_nofail(s->dev_kmsg_fd); | |
1581 | ||
26687bf8 OS |
1582 | if (s->sync_timer_fd >= 0) |
1583 | close_nointr_nofail(s->sync_timer_fd); | |
1584 | ||
d025f1e4 ZJS |
1585 | if (s->rate_limit) |
1586 | journal_rate_limit_free(s->rate_limit); | |
1587 | ||
1588 | if (s->kernel_seqnum) | |
1589 | munmap(s->kernel_seqnum, sizeof(uint64_t)); | |
1590 | ||
1591 | free(s->buffer); | |
1592 | free(s->tty_path); | |
1593 | ||
1594 | if (s->mmap) | |
1595 | mmap_cache_unref(s->mmap); | |
1596 | ||
1597 | if (s->udev) | |
1598 | udev_unref(s->udev); | |
1599 | } |