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87d2c1ff LP |
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 General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
87d2c1ff | 22 | #include <errno.h> |
87d2c1ff | 23 | #include <fcntl.h> |
3fbf9cbb | 24 | #include <stddef.h> |
50f20cfd LP |
25 | #include <unistd.h> |
26 | #include <sys/inotify.h> | |
87d2c1ff LP |
27 | |
28 | #include "sd-journal.h" | |
29 | #include "journal-def.h" | |
cec736d2 | 30 | #include "journal-file.h" |
260a2be4 | 31 | #include "hashmap.h" |
cec736d2 | 32 | #include "list.h" |
de7b95cd | 33 | #include "lookup3.h" |
87d2c1ff | 34 | |
cab8ac60 LP |
35 | #define JOURNAL_FILES_MAX 1024 |
36 | ||
cec736d2 | 37 | typedef struct Match Match; |
87d2c1ff | 38 | |
cec736d2 LP |
39 | struct Match { |
40 | char *data; | |
41 | size_t size; | |
de7b95cd | 42 | uint64_t le_hash; |
87d2c1ff | 43 | |
cec736d2 LP |
44 | LIST_FIELDS(Match, matches); |
45 | }; | |
87d2c1ff | 46 | |
de190aef LP |
47 | typedef enum location_type { |
48 | LOCATION_HEAD, | |
49 | LOCATION_TAIL, | |
50 | LOCATION_DISCRETE | |
51 | } location_type_t; | |
52 | ||
53 | typedef struct Location { | |
54 | location_type_t type; | |
55 | ||
56 | uint64_t seqnum; | |
57 | sd_id128_t seqnum_id; | |
58 | bool seqnum_set; | |
59 | ||
60 | uint64_t realtime; | |
61 | bool realtime_set; | |
62 | ||
63 | uint64_t monotonic; | |
64 | sd_id128_t boot_id; | |
65 | bool monotonic_set; | |
66 | ||
67 | uint64_t xor_hash; | |
68 | bool xor_hash_set; | |
69 | } Location; | |
70 | ||
87d2c1ff | 71 | struct sd_journal { |
260a2be4 | 72 | Hashmap *files; |
87d2c1ff | 73 | |
de190aef | 74 | Location current_location; |
cec736d2 | 75 | JournalFile *current_file; |
7210bfb3 | 76 | uint64_t current_field; |
87d2c1ff | 77 | |
50f20cfd LP |
78 | int inotify_fd; |
79 | Hashmap *inotify_wd_dirs; | |
80 | Hashmap *inotify_wd_roots; | |
81 | ||
cec736d2 | 82 | LIST_HEAD(Match, matches); |
de7b95cd | 83 | unsigned n_matches; |
cec736d2 | 84 | }; |
87d2c1ff | 85 | |
de190aef | 86 | static void detach_location(sd_journal *j) { |
8f9b6cd9 LP |
87 | Iterator i; |
88 | JournalFile *f; | |
89 | ||
90 | assert(j); | |
91 | ||
92 | j->current_file = NULL; | |
93 | j->current_field = 0; | |
94 | ||
95 | HASHMAP_FOREACH(f, j->files, i) | |
96 | f->current_offset = 0; | |
97 | } | |
98 | ||
de190aef LP |
99 | static void reset_location(sd_journal *j) { |
100 | assert(j); | |
101 | ||
102 | detach_location(j); | |
103 | zero(j->current_location); | |
104 | } | |
105 | ||
106 | static void init_location(Location *l, JournalFile *f, Object *o) { | |
107 | assert(l); | |
108 | assert(f); | |
109 | assert(o->object.type == OBJECT_ENTRY); | |
110 | ||
111 | l->type = LOCATION_DISCRETE; | |
112 | l->seqnum = le64toh(o->entry.seqnum); | |
113 | l->seqnum_id = f->header->seqnum_id; | |
114 | l->realtime = le64toh(o->entry.realtime); | |
115 | l->monotonic = le64toh(o->entry.monotonic); | |
116 | l->boot_id = le64toh(o->entry.boot_id); | |
117 | l->xor_hash = le64toh(o->entry.xor_hash); | |
118 | ||
119 | l->seqnum_set = l->realtime_set = l->monotonic_set = l->xor_hash_set = true; | |
120 | } | |
121 | ||
122 | static void set_location(sd_journal *j, JournalFile *f, Object *o, uint64_t offset) { | |
123 | assert(j); | |
124 | assert(f); | |
125 | assert(o); | |
126 | ||
127 | init_location(&j->current_location, f, o); | |
128 | ||
129 | j->current_file = f; | |
130 | j->current_field = 0; | |
131 | ||
132 | f->current_offset = offset; | |
133 | } | |
134 | ||
135 | static int same_field(const void *_a, size_t s, const void *_b, size_t t) { | |
136 | const uint8_t *a = _a, *b = _b; | |
137 | size_t j; | |
138 | bool a_good = false, b_good = false, different = false; | |
139 | ||
140 | for (j = 0; j < s && j < t; j++) { | |
141 | ||
142 | if (a[j] == '=') | |
143 | a_good = true; | |
144 | if (b[j] == '=') | |
145 | b_good = true; | |
146 | if (a[j] != b[j]) | |
147 | different = true; | |
148 | ||
149 | if (a_good && b_good) | |
150 | return different ? 0 : 1; | |
151 | } | |
152 | ||
153 | return -EINVAL; | |
154 | } | |
155 | ||
1cc101f1 | 156 | int sd_journal_add_match(sd_journal *j, const void *data, size_t size) { |
de190aef LP |
157 | Match *m, *after = NULL; |
158 | uint64_t le_hash; | |
87d2c1ff | 159 | |
cec736d2 | 160 | assert(j); |
1cc101f1 LP |
161 | |
162 | if (size <= 0) | |
163 | return -EINVAL; | |
164 | ||
165 | assert(data); | |
87d2c1ff | 166 | |
de190aef LP |
167 | le_hash = htole64(hash64(data, size)); |
168 | ||
169 | LIST_FOREACH(matches, m, j->matches) { | |
170 | int r; | |
171 | ||
172 | if (m->le_hash == le_hash && | |
173 | m->size == size && | |
174 | memcmp(m->data, data, size) == 0) | |
175 | return 0; | |
176 | ||
177 | r = same_field(data, size, m->data, m->size); | |
178 | if (r < 0) | |
179 | return r; | |
180 | else if (r > 0) | |
181 | after = m; | |
182 | } | |
183 | ||
cec736d2 LP |
184 | m = new0(Match, 1); |
185 | if (!m) | |
186 | return -ENOMEM; | |
87d2c1ff | 187 | |
1cc101f1 LP |
188 | m->size = size; |
189 | ||
cec736d2 LP |
190 | m->data = malloc(m->size); |
191 | if (!m->data) { | |
192 | free(m); | |
193 | return -ENOMEM; | |
87d2c1ff LP |
194 | } |
195 | ||
1cc101f1 | 196 | memcpy(m->data, data, size); |
de190aef | 197 | m->le_hash = le_hash; |
87d2c1ff | 198 | |
de190aef LP |
199 | /* Matches for the same fields we order adjacent to each |
200 | * other */ | |
201 | LIST_INSERT_AFTER(Match, matches, j->matches, after, m); | |
de7b95cd LP |
202 | j->n_matches ++; |
203 | ||
de190aef | 204 | detach_location(j); |
8f9b6cd9 | 205 | |
87d2c1ff LP |
206 | return 0; |
207 | } | |
208 | ||
cec736d2 LP |
209 | void sd_journal_flush_matches(sd_journal *j) { |
210 | assert(j); | |
87d2c1ff | 211 | |
cec736d2 LP |
212 | while (j->matches) { |
213 | Match *m = j->matches; | |
87d2c1ff | 214 | |
cec736d2 LP |
215 | LIST_REMOVE(Match, matches, j->matches, m); |
216 | free(m->data); | |
217 | free(m); | |
87d2c1ff | 218 | } |
de7b95cd LP |
219 | |
220 | j->n_matches = 0; | |
8f9b6cd9 | 221 | |
de190aef | 222 | detach_location(j); |
87d2c1ff LP |
223 | } |
224 | ||
de190aef LP |
225 | static int compare_order(JournalFile *af, Object *ao, |
226 | JournalFile *bf, Object *bo) { | |
87d2c1ff | 227 | |
cec736d2 | 228 | uint64_t a, b; |
87d2c1ff | 229 | |
de190aef LP |
230 | assert(af); |
231 | assert(ao); | |
232 | assert(bf); | |
233 | assert(bo); | |
234 | ||
ae2cc8ef | 235 | /* We operate on two different files here, hence we can access |
1cc101f1 LP |
236 | * two objects at the same time, which we normally can't. |
237 | * | |
238 | * If contents and timestamps match, these entries are | |
239 | * identical, even if the seqnum does not match */ | |
240 | ||
241 | if (sd_id128_equal(ao->entry.boot_id, bo->entry.boot_id) && | |
242 | ao->entry.monotonic == bo->entry.monotonic && | |
243 | ao->entry.realtime == bo->entry.realtime && | |
244 | ao->entry.xor_hash == bo->entry.xor_hash) | |
245 | return 0; | |
ae2cc8ef | 246 | |
cec736d2 | 247 | if (sd_id128_equal(af->header->seqnum_id, bf->header->seqnum_id)) { |
87d2c1ff | 248 | |
cec736d2 LP |
249 | /* If this is from the same seqnum source, compare |
250 | * seqnums */ | |
251 | a = le64toh(ao->entry.seqnum); | |
252 | b = le64toh(bo->entry.seqnum); | |
87d2c1ff | 253 | |
ae2cc8ef LP |
254 | if (a < b) |
255 | return -1; | |
256 | if (a > b) | |
257 | return 1; | |
1cc101f1 LP |
258 | |
259 | /* Wow! This is weird, different data but the same | |
260 | * seqnums? Something is borked, but let's make the | |
261 | * best of it and compare by time. */ | |
ae2cc8ef | 262 | } |
87d2c1ff | 263 | |
ae2cc8ef | 264 | if (sd_id128_equal(ao->entry.boot_id, bo->entry.boot_id)) { |
87d2c1ff | 265 | |
cec736d2 LP |
266 | /* If the boot id matches compare monotonic time */ |
267 | a = le64toh(ao->entry.monotonic); | |
268 | b = le64toh(bo->entry.monotonic); | |
87d2c1ff | 269 | |
ae2cc8ef LP |
270 | if (a < b) |
271 | return -1; | |
272 | if (a > b) | |
273 | return 1; | |
87d2c1ff LP |
274 | } |
275 | ||
ae2cc8ef LP |
276 | /* Otherwise compare UTC time */ |
277 | a = le64toh(ao->entry.realtime); | |
278 | b = le64toh(ao->entry.realtime); | |
279 | ||
280 | if (a < b) | |
281 | return -1; | |
282 | if (a > b) | |
283 | return 1; | |
284 | ||
285 | /* Finally, compare by contents */ | |
286 | a = le64toh(ao->entry.xor_hash); | |
287 | b = le64toh(ao->entry.xor_hash); | |
288 | ||
289 | if (a < b) | |
290 | return -1; | |
291 | if (a > b) | |
292 | return 1; | |
293 | ||
294 | return 0; | |
87d2c1ff LP |
295 | } |
296 | ||
de190aef LP |
297 | static int compare_with_location(JournalFile *af, Object *ao, Location *l) { |
298 | uint64_t a; | |
299 | ||
300 | assert(af); | |
301 | assert(ao); | |
302 | assert(l); | |
303 | assert(l->type == LOCATION_DISCRETE); | |
304 | ||
305 | if (l->monotonic_set && | |
306 | sd_id128_equal(ao->entry.boot_id, l->boot_id) && | |
307 | l->realtime_set && | |
308 | le64toh(ao->entry.realtime) == l->realtime && | |
309 | l->xor_hash_set && | |
310 | le64toh(ao->entry.xor_hash) == l->xor_hash) | |
311 | return 0; | |
312 | ||
313 | if (l->seqnum_set && | |
314 | sd_id128_equal(af->header->seqnum_id, l->seqnum_id)) { | |
315 | ||
316 | a = le64toh(ao->entry.seqnum); | |
317 | ||
318 | if (a < l->seqnum) | |
319 | return -1; | |
320 | if (a > l->seqnum) | |
321 | return 1; | |
322 | } | |
323 | ||
324 | if (l->monotonic_set && | |
325 | sd_id128_equal(ao->entry.boot_id, l->boot_id)) { | |
326 | ||
327 | a = le64toh(ao->entry.monotonic); | |
328 | ||
329 | if (a < l->monotonic) | |
330 | return -1; | |
331 | if (a > l->monotonic) | |
332 | return 1; | |
333 | } | |
334 | ||
335 | if (l->realtime_set) { | |
336 | ||
337 | a = le64toh(ao->entry.realtime); | |
338 | ||
339 | if (a < l->realtime) | |
340 | return -1; | |
341 | if (a > l->realtime) | |
342 | return 1; | |
343 | } | |
344 | ||
345 | if (l->xor_hash_set) { | |
346 | a = le64toh(ao->entry.xor_hash); | |
347 | ||
348 | if (a < l->xor_hash) | |
349 | return -1; | |
350 | if (a > l->xor_hash) | |
351 | return 1; | |
352 | } | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | static int find_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) { | |
358 | Object *o = NULL; | |
359 | uint64_t p = 0; | |
de7b95cd | 360 | int r; |
de7b95cd LP |
361 | |
362 | assert(j); | |
de7b95cd LP |
363 | |
364 | if (!j->matches) { | |
de190aef LP |
365 | /* No matches is simple */ |
366 | ||
367 | if (j->current_location.type == LOCATION_HEAD) | |
368 | r = journal_file_next_entry(f, NULL, 0, DIRECTION_DOWN, &o, &p); | |
369 | else if (j->current_location.type == LOCATION_TAIL) | |
370 | r = journal_file_next_entry(f, NULL, 0, DIRECTION_UP, &o, &p); | |
371 | else if (j->current_location.seqnum_set && | |
372 | sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id)) | |
373 | r = journal_file_move_to_entry_by_seqnum(f, j->current_location.seqnum, direction, &o, &p); | |
374 | else if (j->current_location.monotonic_set) | |
375 | r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, &o, &p); | |
376 | else if (j->current_location.realtime_set) | |
377 | r = journal_file_move_to_entry_by_realtime(f, j->current_location.realtime, direction, &o, &p); | |
378 | else | |
379 | r = journal_file_next_entry(f, NULL, 0, direction, &o, &p); | |
380 | ||
381 | if (r <= 0) | |
382 | return r; | |
383 | ||
384 | } else { | |
385 | Match *m, *term_match = NULL; | |
386 | Object *to = NULL; | |
387 | uint64_t tp = 0; | |
388 | ||
389 | /* We have matches, first, let's jump to the monotonic | |
390 | * position if we have any, since it implies a | |
391 | * match. */ | |
de7b95cd | 392 | |
de190aef LP |
393 | if (j->current_location.type == LOCATION_DISCRETE && |
394 | j->current_location.monotonic_set) { | |
395 | ||
396 | r = journal_file_move_to_entry_by_monotonic(f, j->current_location.boot_id, j->current_location.monotonic, direction, &o, &p); | |
397 | if (r <= 0) | |
de7b95cd | 398 | return r; |
de190aef LP |
399 | } |
400 | ||
401 | LIST_FOREACH(matches, m, j->matches) { | |
402 | Object *c, *d; | |
403 | uint64_t cp, dp; | |
404 | ||
405 | r = journal_file_find_data_object_with_hash(f, m->data, m->size, m->le_hash, &d, &dp); | |
406 | if (r <= 0) | |
407 | return r; | |
408 | ||
409 | if (j->current_location.type == LOCATION_HEAD) | |
410 | r = journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_DOWN, &c, &cp); | |
411 | else if (j->current_location.type == LOCATION_TAIL) | |
412 | r = journal_file_next_entry_for_data(f, NULL, 0, dp, DIRECTION_UP, &c, &cp); | |
413 | else if (j->current_location.seqnum_set && | |
414 | sd_id128_equal(j->current_location.seqnum_id, f->header->seqnum_id)) | |
415 | r = journal_file_move_to_entry_by_seqnum_for_data(f, dp, j->current_location.seqnum, direction, &c, &cp); | |
416 | else if (j->current_location.realtime_set) | |
417 | r = journal_file_move_to_entry_by_realtime_for_data(f, dp, j->current_location.realtime, direction, &c, &cp); | |
418 | else | |
419 | r = journal_file_next_entry_for_data(f, NULL, 0, dp, direction, &c, &cp); | |
420 | ||
421 | if (!term_match) { | |
422 | term_match = m; | |
423 | ||
424 | if (r > 0) { | |
425 | to = c; | |
426 | tp = cp; | |
427 | } | |
428 | } else if (same_field(term_match->data, term_match->size, m->data, m->size)) { | |
429 | ||
430 | /* Same field as previous match... */ | |
431 | if (r > 0) { | |
432 | ||
433 | /* Find the earliest of the OR matches */ | |
434 | ||
435 | if (!to || | |
436 | (direction == DIRECTION_DOWN && cp < tp) || | |
437 | (direction == DIRECTION_UP && cp > tp)) { | |
438 | to = c; | |
439 | tp = tp; | |
440 | } | |
441 | ||
442 | } | |
de7b95cd | 443 | |
de190aef LP |
444 | } else { |
445 | ||
446 | /* Previous term is finished, did anything match? */ | |
447 | if (!to) | |
448 | return 0; | |
449 | ||
450 | /* Find the last of the AND matches */ | |
451 | if (!o || | |
452 | (direction == DIRECTION_DOWN && tp > p) || | |
453 | (direction == DIRECTION_UP && tp < p)) { | |
454 | o = to; | |
455 | p = tp; | |
456 | } | |
457 | ||
458 | term_match = m; | |
459 | ||
460 | if (r > 0) { | |
461 | to = c; | |
462 | tp = cp; | |
463 | } else { | |
464 | to = NULL; | |
465 | tp = 0; | |
466 | } | |
467 | } | |
468 | } | |
469 | ||
470 | /* Last term is finished, did anything match? */ | |
471 | if (!to) | |
472 | return 0; | |
473 | ||
474 | if (!o || | |
475 | (direction == DIRECTION_DOWN && tp > p) || | |
476 | (direction == DIRECTION_UP && tp < p)) { | |
477 | o = to; | |
478 | p = tp; | |
479 | } | |
480 | ||
481 | if (!o) | |
482 | return 0; | |
de7b95cd LP |
483 | } |
484 | ||
de190aef LP |
485 | if (ret) |
486 | *ret = o; | |
de7b95cd | 487 | |
de190aef LP |
488 | if (offset) |
489 | *offset = p; | |
490 | ||
491 | return 1; | |
492 | } | |
493 | ||
494 | static int next_with_matches(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) { | |
495 | int r; | |
496 | uint64_t cp; | |
497 | Object *c; | |
498 | ||
499 | assert(j); | |
500 | assert(f); | |
501 | assert(ret); | |
502 | assert(offset); | |
503 | ||
504 | c = *ret; | |
505 | cp = *offset; | |
506 | ||
507 | if (!j->matches) { | |
508 | /* No matches is easy */ | |
509 | ||
510 | r = journal_file_next_entry(f, c, cp, direction, &c, &cp); | |
de7b95cd LP |
511 | if (r <= 0) |
512 | return r; | |
513 | ||
de190aef LP |
514 | if (ret) |
515 | *ret = c; | |
516 | if (offset) | |
517 | *offset = cp; | |
518 | return 1; | |
de7b95cd LP |
519 | } |
520 | ||
de190aef LP |
521 | /* So there are matches we have to adhere to, let's find the |
522 | * first entry that matches all of them */ | |
523 | ||
de7b95cd LP |
524 | for (;;) { |
525 | uint64_t np, n; | |
de190aef LP |
526 | bool found, term_result = false; |
527 | Match *m, *term_match = NULL; | |
466ccd92 | 528 | Object *npo = NULL; |
de7b95cd LP |
529 | |
530 | n = journal_file_entry_n_items(c); | |
531 | ||
532 | /* Make sure we don't match the entry we are starting | |
533 | * from. */ | |
de190aef | 534 | found = cp > *offset; |
de7b95cd LP |
535 | |
536 | np = 0; | |
537 | LIST_FOREACH(matches, m, j->matches) { | |
538 | uint64_t q, k; | |
466ccd92 | 539 | Object *qo = NULL; |
de7b95cd | 540 | |
de190aef LP |
541 | /* Let's check if this is the beginning of a |
542 | * new term, i.e. has a different field prefix | |
543 | * as the preceeding match. */ | |
544 | if (!term_match) { | |
545 | term_match = m; | |
546 | term_result = false; | |
547 | } else if (!same_field(term_match->data, term_match->size, m->data, m->size)) { | |
548 | if (!term_result) | |
549 | found = false; | |
550 | ||
551 | term_match = m; | |
552 | term_result = false; | |
553 | } | |
554 | ||
de7b95cd LP |
555 | for (k = 0; k < n; k++) |
556 | if (c->entry.items[k].hash == m->le_hash) | |
557 | break; | |
558 | ||
559 | if (k >= n) { | |
de190aef LP |
560 | /* Hmm, didn't find any field that |
561 | * matched this rule, so ignore this | |
562 | * match. Go on with next match */ | |
de7b95cd LP |
563 | continue; |
564 | } | |
565 | ||
de190aef LP |
566 | term_result = true; |
567 | ||
de7b95cd LP |
568 | /* Hmm, so, this field matched, let's remember |
569 | * where we'd have to try next, in case the other | |
570 | * matches are not OK */ | |
e892bd17 | 571 | |
466ccd92 | 572 | r = journal_file_next_entry_for_data(f, c, cp, le64toh(c->entry.items[k].object_offset), direction, &qo, &q); |
de190aef | 573 | if (r > 0) { |
e892bd17 | 574 | |
de190aef | 575 | if (direction == DIRECTION_DOWN) { |
466ccd92 | 576 | if (q > np) { |
de190aef | 577 | np = q; |
466ccd92 LP |
578 | npo = qo; |
579 | } | |
de190aef | 580 | } else { |
466ccd92 | 581 | if (np == 0 || q < np) { |
de190aef | 582 | np = q; |
466ccd92 LP |
583 | npo = qo; |
584 | } | |
de190aef | 585 | } |
e892bd17 | 586 | } |
de7b95cd LP |
587 | } |
588 | ||
de190aef | 589 | /* Check the last term */ |
466ccd92 LP |
590 | if (term_match && !term_result) |
591 | found = false; | |
de190aef | 592 | |
de7b95cd LP |
593 | /* Did this entry match against all matches? */ |
594 | if (found) { | |
de190aef LP |
595 | if (ret) |
596 | *ret = c; | |
597 | if (offset) | |
598 | *offset = cp; | |
de7b95cd LP |
599 | return 1; |
600 | } | |
601 | ||
602 | /* Did we find a subsequent entry? */ | |
603 | if (np == 0) | |
604 | return 0; | |
605 | ||
606 | /* Hmm, ok, this entry only matched partially, so | |
607 | * let's try another one */ | |
608 | cp = np; | |
466ccd92 | 609 | c = npo; |
de7b95cd LP |
610 | } |
611 | } | |
612 | ||
de190aef LP |
613 | static int next_beyond_location(sd_journal *j, JournalFile *f, direction_t direction, Object **ret, uint64_t *offset) { |
614 | Object *c; | |
615 | uint64_t cp; | |
616 | int compare_value, r; | |
617 | ||
618 | assert(j); | |
619 | assert(f); | |
620 | ||
621 | if (f->current_offset > 0) { | |
466ccd92 LP |
622 | cp = f->current_offset; |
623 | ||
624 | r = journal_file_move_to_object(f, OBJECT_ENTRY, cp, &c); | |
de190aef LP |
625 | if (r < 0) |
626 | return r; | |
627 | ||
de190aef LP |
628 | r = next_with_matches(j, f, direction, &c, &cp); |
629 | if (r <= 0) | |
630 | return r; | |
631 | ||
632 | compare_value = 1; | |
633 | } else { | |
634 | r = find_location(j, f, direction, &c, &cp); | |
635 | if (r <= 0) | |
636 | return r; | |
637 | ||
638 | compare_value = 0; | |
639 | } | |
640 | ||
641 | for (;;) { | |
642 | bool found; | |
643 | ||
644 | if (j->current_location.type == LOCATION_DISCRETE) { | |
645 | int k; | |
646 | ||
647 | k = compare_with_location(f, c, &j->current_location); | |
648 | if (direction == DIRECTION_DOWN) | |
649 | found = k >= compare_value; | |
650 | else | |
651 | found = k <= -compare_value; | |
652 | } else | |
653 | found = true; | |
654 | ||
655 | if (found) { | |
656 | if (ret) | |
657 | *ret = c; | |
658 | if (offset) | |
659 | *offset = cp; | |
660 | return 1; | |
661 | } | |
662 | ||
663 | r = next_with_matches(j, f, direction, &c, &cp); | |
664 | if (r <= 0) | |
665 | return r; | |
666 | } | |
667 | } | |
668 | ||
e892bd17 | 669 | static int real_journal_next(sd_journal *j, direction_t direction) { |
cec736d2 LP |
670 | JournalFile *f, *new_current = NULL; |
671 | Iterator i; | |
87d2c1ff | 672 | int r; |
cec736d2 LP |
673 | uint64_t new_offset = 0; |
674 | Object *new_entry = NULL; | |
87d2c1ff | 675 | |
cec736d2 | 676 | assert(j); |
87d2c1ff | 677 | |
cec736d2 LP |
678 | HASHMAP_FOREACH(f, j->files, i) { |
679 | Object *o; | |
680 | uint64_t p; | |
de190aef | 681 | bool found; |
87d2c1ff | 682 | |
de190aef | 683 | r = next_beyond_location(j, f, direction, &o, &p); |
87d2c1ff LP |
684 | if (r < 0) |
685 | return r; | |
cec736d2 LP |
686 | else if (r == 0) |
687 | continue; | |
87d2c1ff | 688 | |
de190aef LP |
689 | if (!new_current) |
690 | found = true; | |
691 | else { | |
692 | int k; | |
693 | ||
694 | k = compare_order(f, o, new_current, new_entry); | |
695 | ||
696 | if (direction == DIRECTION_DOWN) | |
697 | found = k < 0; | |
698 | else | |
699 | found = k > 0; | |
700 | } | |
701 | ||
702 | if (found) { | |
cec736d2 LP |
703 | new_current = f; |
704 | new_entry = o; | |
705 | new_offset = p; | |
87d2c1ff | 706 | } |
87d2c1ff LP |
707 | } |
708 | ||
de190aef LP |
709 | if (!new_current) |
710 | return 0; | |
ae2cc8ef | 711 | |
de190aef | 712 | set_location(j, new_current, new_entry, new_offset); |
ae2cc8ef | 713 | |
de190aef LP |
714 | return 1; |
715 | } | |
ae2cc8ef | 716 | |
de190aef LP |
717 | int sd_journal_next(sd_journal *j) { |
718 | return real_journal_next(j, DIRECTION_DOWN); | |
719 | } | |
ae2cc8ef | 720 | |
de190aef LP |
721 | int sd_journal_previous(sd_journal *j) { |
722 | return real_journal_next(j, DIRECTION_UP); | |
723 | } | |
ae2cc8ef | 724 | |
de190aef LP |
725 | int sd_journal_next_skip(sd_journal *j, uint64_t skip) { |
726 | int c = 0, r; | |
ae2cc8ef | 727 | |
de190aef LP |
728 | assert(j); |
729 | ||
730 | while (skip > 0) { | |
731 | r = sd_journal_next(j); | |
732 | if (r < 0) | |
733 | return r; | |
734 | ||
735 | if (r == 0) | |
736 | return c; | |
737 | ||
738 | skip--; | |
739 | c++; | |
87d2c1ff LP |
740 | } |
741 | ||
de190aef | 742 | return c; |
87d2c1ff LP |
743 | } |
744 | ||
de190aef LP |
745 | int sd_journal_previous_skip(sd_journal *j, uint64_t skip) { |
746 | int c = 0, r; | |
87d2c1ff | 747 | |
de190aef LP |
748 | assert(j); |
749 | ||
750 | while (skip > 0) { | |
751 | r = sd_journal_previous(j); | |
752 | if (r < 0) | |
753 | return r; | |
754 | ||
755 | if (r == 0) | |
756 | return c; | |
757 | ||
758 | skip--; | |
759 | c++; | |
760 | } | |
761 | ||
762 | return 1; | |
87d2c1ff LP |
763 | } |
764 | ||
3fbf9cbb | 765 | int sd_journal_get_cursor(sd_journal *j, char **cursor) { |
cec736d2 | 766 | Object *o; |
87d2c1ff | 767 | int r; |
3fbf9cbb | 768 | char bid[33], sid[33]; |
87d2c1ff | 769 | |
cec736d2 LP |
770 | assert(j); |
771 | assert(cursor); | |
87d2c1ff | 772 | |
3fbf9cbb LP |
773 | if (!j->current_file || j->current_file->current_offset <= 0) |
774 | return -EADDRNOTAVAIL; | |
87d2c1ff | 775 | |
de190aef | 776 | r = journal_file_move_to_object(j->current_file, OBJECT_ENTRY, j->current_file->current_offset, &o); |
87d2c1ff LP |
777 | if (r < 0) |
778 | return r; | |
779 | ||
3fbf9cbb LP |
780 | sd_id128_to_string(j->current_file->header->seqnum_id, sid); |
781 | sd_id128_to_string(o->entry.boot_id, bid); | |
87d2c1ff | 782 | |
3fbf9cbb LP |
783 | if (asprintf(cursor, |
784 | "s=%s;i=%llx;b=%s;m=%llx;t=%llx;x=%llx;p=%s", | |
785 | sid, (unsigned long long) le64toh(o->entry.seqnum), | |
786 | bid, (unsigned long long) le64toh(o->entry.monotonic), | |
787 | (unsigned long long) le64toh(o->entry.realtime), | |
788 | (unsigned long long) le64toh(o->entry.xor_hash), | |
789 | file_name_from_path(j->current_file->path)) < 0) | |
790 | return -ENOMEM; | |
87d2c1ff LP |
791 | |
792 | return 1; | |
793 | } | |
794 | ||
de190aef LP |
795 | int sd_journal_seek_cursor(sd_journal *j, const char *cursor) { |
796 | char *w; | |
797 | size_t l; | |
798 | char *state; | |
799 | unsigned long long seqnum, monotonic, realtime, xor_hash; | |
800 | bool | |
801 | seqnum_id_set = false, | |
802 | seqnum_set = false, | |
803 | boot_id_set = false, | |
804 | monotonic_set = false, | |
805 | realtime_set = false, | |
806 | xor_hash_set = false; | |
807 | sd_id128_t seqnum_id, boot_id; | |
808 | ||
809 | assert(j); | |
810 | assert(cursor); | |
811 | ||
812 | FOREACH_WORD_SEPARATOR(w, l, cursor, ";", state) { | |
813 | char *item; | |
814 | int k = 0; | |
815 | ||
816 | if (l < 2 || w[1] != '=') | |
817 | return -EINVAL; | |
818 | ||
819 | item = strndup(w, l); | |
820 | if (!item) | |
821 | return -ENOMEM; | |
822 | ||
823 | switch (w[0]) { | |
824 | ||
825 | case 's': | |
826 | seqnum_id_set = true; | |
827 | k = sd_id128_from_string(w+2, &seqnum_id); | |
828 | break; | |
829 | ||
830 | case 'i': | |
831 | seqnum_set = true; | |
832 | if (sscanf(w+2, "%llx", &seqnum) != 1) | |
833 | k = -EINVAL; | |
834 | break; | |
835 | ||
836 | case 'b': | |
837 | boot_id_set = true; | |
838 | k = sd_id128_from_string(w+2, &boot_id); | |
839 | break; | |
840 | ||
841 | case 'm': | |
842 | monotonic_set = true; | |
843 | if (sscanf(w+2, "%llx", &monotonic) != 1) | |
844 | k = -EINVAL; | |
845 | break; | |
846 | ||
847 | case 't': | |
848 | realtime_set = true; | |
849 | if (sscanf(w+2, "%llx", &realtime) != 1) | |
850 | k = -EINVAL; | |
851 | break; | |
852 | ||
853 | case 'x': | |
854 | xor_hash_set = true; | |
855 | if (sscanf(w+2, "%llx", &xor_hash) != 1) | |
856 | k = -EINVAL; | |
857 | break; | |
858 | } | |
859 | ||
860 | free(item); | |
861 | ||
862 | if (k < 0) | |
863 | return k; | |
864 | } | |
865 | ||
866 | if ((!seqnum_set || !seqnum_id_set) && | |
867 | (!monotonic_set || !boot_id_set) && | |
868 | !realtime_set) | |
869 | return -EINVAL; | |
870 | ||
871 | reset_location(j); | |
872 | ||
873 | j->current_location.type = LOCATION_DISCRETE; | |
874 | ||
875 | if (realtime_set) { | |
876 | j->current_location.realtime = (uint64_t) realtime; | |
877 | j->current_location.realtime_set = true; | |
878 | } | |
879 | ||
880 | if (seqnum_set && seqnum_id_set) { | |
881 | j->current_location.seqnum = (uint64_t) seqnum; | |
882 | j->current_location.seqnum_id = seqnum_id; | |
883 | j->current_location.seqnum_set = true; | |
884 | } | |
885 | ||
886 | if (monotonic_set && boot_id_set) { | |
887 | j->current_location.monotonic = (uint64_t) monotonic; | |
888 | j->current_location.boot_id = boot_id; | |
889 | j->current_location.monotonic_set = true; | |
890 | } | |
891 | ||
892 | if (xor_hash_set) { | |
893 | j->current_location.xor_hash = (uint64_t) xor_hash; | |
894 | j->current_location.xor_hash_set = true; | |
895 | } | |
896 | ||
897 | return 0; | |
898 | } | |
899 | ||
900 | int sd_journal_seek_monotonic_usec(sd_journal *j, sd_id128_t boot_id, uint64_t usec) { | |
901 | assert(j); | |
902 | ||
903 | reset_location(j); | |
904 | j->current_location.type = LOCATION_DISCRETE; | |
905 | j->current_location.boot_id = boot_id; | |
906 | j->current_location.monotonic = usec; | |
907 | j->current_location.monotonic_set = true; | |
908 | ||
909 | return 0; | |
910 | } | |
911 | ||
912 | int sd_journal_seek_realtime_usec(sd_journal *j, uint64_t usec) { | |
913 | assert(j); | |
914 | ||
915 | reset_location(j); | |
916 | j->current_location.type = LOCATION_DISCRETE; | |
917 | j->current_location.realtime = usec; | |
918 | j->current_location.realtime_set = true; | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | int sd_journal_seek_head(sd_journal *j) { | |
924 | assert(j); | |
925 | ||
926 | reset_location(j); | |
927 | j->current_location.type = LOCATION_HEAD; | |
928 | ||
929 | return 0; | |
930 | } | |
931 | ||
932 | int sd_journal_seek_tail(sd_journal *j) { | |
933 | assert(j); | |
934 | ||
935 | reset_location(j); | |
936 | j->current_location.type = LOCATION_TAIL; | |
937 | ||
938 | return 0; | |
87d2c1ff LP |
939 | } |
940 | ||
3fbf9cbb LP |
941 | static int add_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) { |
942 | char *fn; | |
943 | int r; | |
944 | JournalFile *f; | |
945 | ||
946 | assert(j); | |
947 | assert(prefix); | |
948 | assert(filename); | |
949 | ||
950 | if (dir) | |
951 | fn = join(prefix, "/", dir, "/", filename, NULL); | |
952 | else | |
953 | fn = join(prefix, "/", filename, NULL); | |
954 | ||
955 | if (!fn) | |
956 | return -ENOMEM; | |
957 | ||
50f20cfd LP |
958 | if (hashmap_get(j->files, fn)) { |
959 | free(fn); | |
960 | return 0; | |
961 | } | |
962 | ||
963 | if (hashmap_size(j->files) >= JOURNAL_FILES_MAX) { | |
964 | log_debug("Too many open journal files, not adding %s, ignoring.", fn); | |
965 | free(fn); | |
966 | return 0; | |
967 | } | |
968 | ||
3fbf9cbb LP |
969 | r = journal_file_open(fn, O_RDONLY, 0, NULL, &f); |
970 | free(fn); | |
971 | ||
972 | if (r < 0) { | |
973 | if (errno == ENOENT) | |
974 | return 0; | |
975 | ||
976 | return r; | |
977 | } | |
978 | ||
de190aef LP |
979 | journal_file_dump(f); |
980 | ||
3fbf9cbb LP |
981 | r = hashmap_put(j->files, f->path, f); |
982 | if (r < 0) { | |
983 | journal_file_close(f); | |
984 | return r; | |
985 | } | |
986 | ||
50f20cfd LP |
987 | log_debug("File %s got added.", f->path); |
988 | ||
989 | return 0; | |
990 | } | |
991 | ||
992 | static int remove_file(sd_journal *j, const char *prefix, const char *dir, const char *filename) { | |
993 | char *fn; | |
994 | JournalFile *f; | |
995 | ||
996 | assert(j); | |
997 | assert(prefix); | |
998 | assert(filename); | |
999 | ||
1000 | if (dir) | |
1001 | fn = join(prefix, "/", dir, "/", filename, NULL); | |
1002 | else | |
1003 | fn = join(prefix, "/", filename, NULL); | |
1004 | ||
1005 | if (!fn) | |
1006 | return -ENOMEM; | |
1007 | ||
1008 | f = hashmap_get(j->files, fn); | |
1009 | free(fn); | |
1010 | ||
1011 | if (!f) | |
1012 | return 0; | |
1013 | ||
1014 | hashmap_remove(j->files, f->path); | |
1015 | journal_file_close(f); | |
1016 | ||
1017 | log_debug("File %s got removed.", f->path); | |
3fbf9cbb LP |
1018 | return 0; |
1019 | } | |
1020 | ||
1021 | static int add_directory(sd_journal *j, const char *prefix, const char *dir) { | |
1022 | char *fn; | |
1023 | int r; | |
1024 | DIR *d; | |
50f20cfd | 1025 | int wd; |
3fbf9cbb LP |
1026 | |
1027 | assert(j); | |
1028 | assert(prefix); | |
1029 | assert(dir); | |
1030 | ||
1031 | fn = join(prefix, "/", dir, NULL); | |
1032 | if (!fn) | |
1033 | return -ENOMEM; | |
1034 | ||
1035 | d = opendir(fn); | |
3fbf9cbb LP |
1036 | |
1037 | if (!d) { | |
50f20cfd | 1038 | free(fn); |
3fbf9cbb LP |
1039 | if (errno == ENOENT) |
1040 | return 0; | |
1041 | ||
1042 | return -errno; | |
1043 | } | |
1044 | ||
50f20cfd LP |
1045 | wd = inotify_add_watch(j->inotify_fd, fn, |
1046 | IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE| | |
1047 | IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT| | |
1048 | IN_DONT_FOLLOW|IN_ONLYDIR); | |
1049 | if (wd > 0) { | |
1050 | if (hashmap_put(j->inotify_wd_dirs, INT_TO_PTR(wd), fn) < 0) | |
1051 | inotify_rm_watch(j->inotify_fd, wd); | |
1052 | else | |
1053 | fn = NULL; | |
1054 | } | |
1055 | ||
1056 | free(fn); | |
1057 | ||
3fbf9cbb LP |
1058 | for (;;) { |
1059 | struct dirent buf, *de; | |
1060 | ||
1061 | r = readdir_r(d, &buf, &de); | |
1062 | if (r != 0 || !de) | |
1063 | break; | |
1064 | ||
1065 | if (!dirent_is_file_with_suffix(de, ".journal")) | |
1066 | continue; | |
1067 | ||
1068 | r = add_file(j, prefix, dir, de->d_name); | |
1069 | if (r < 0) | |
1070 | log_debug("Failed to add file %s/%s/%s: %s", prefix, dir, de->d_name, strerror(-r)); | |
1071 | } | |
1072 | ||
1073 | closedir(d); | |
1074 | ||
50f20cfd LP |
1075 | log_debug("Directory %s/%s got added.", prefix, dir); |
1076 | ||
3fbf9cbb LP |
1077 | return 0; |
1078 | } | |
1079 | ||
50f20cfd LP |
1080 | static void remove_directory_wd(sd_journal *j, int wd) { |
1081 | char *p; | |
1082 | ||
1083 | assert(j); | |
1084 | assert(wd > 0); | |
1085 | ||
1086 | if (j->inotify_fd >= 0) | |
1087 | inotify_rm_watch(j->inotify_fd, wd); | |
1088 | ||
1089 | p = hashmap_remove(j->inotify_wd_dirs, INT_TO_PTR(wd)); | |
1090 | ||
1091 | if (p) { | |
1092 | log_debug("Directory %s got removed.", p); | |
1093 | free(p); | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | static void add_root_wd(sd_journal *j, const char *p) { | |
1098 | int wd; | |
1099 | char *k; | |
1100 | ||
1101 | assert(j); | |
1102 | assert(p); | |
1103 | ||
1104 | wd = inotify_add_watch(j->inotify_fd, p, | |
1105 | IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB|IN_DELETE| | |
1106 | IN_DONT_FOLLOW|IN_ONLYDIR); | |
1107 | if (wd <= 0) | |
1108 | return; | |
1109 | ||
1110 | k = strdup(p); | |
1111 | if (!k || hashmap_put(j->inotify_wd_roots, INT_TO_PTR(wd), k) < 0) { | |
1112 | inotify_rm_watch(j->inotify_fd, wd); | |
1113 | free(k); | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | static void remove_root_wd(sd_journal *j, int wd) { | |
1118 | char *p; | |
1119 | ||
1120 | assert(j); | |
1121 | assert(wd > 0); | |
1122 | ||
1123 | if (j->inotify_fd >= 0) | |
1124 | inotify_rm_watch(j->inotify_fd, wd); | |
1125 | ||
1126 | p = hashmap_remove(j->inotify_wd_roots, INT_TO_PTR(wd)); | |
1127 | ||
1128 | if (p) { | |
1129 | log_debug("Root %s got removed.", p); | |
1130 | free(p); | |
1131 | } | |
1132 | } | |
1133 | ||
87d2c1ff LP |
1134 | int sd_journal_open(sd_journal **ret) { |
1135 | sd_journal *j; | |
87d2c1ff | 1136 | const char *p; |
87d2c1ff LP |
1137 | const char search_paths[] = |
1138 | "/run/log/journal\0" | |
1139 | "/var/log/journal\0"; | |
3fbf9cbb | 1140 | int r; |
87d2c1ff LP |
1141 | |
1142 | assert(ret); | |
1143 | ||
1144 | j = new0(sd_journal, 1); | |
1145 | if (!j) | |
1146 | return -ENOMEM; | |
1147 | ||
50f20cfd LP |
1148 | j->inotify_fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); |
1149 | if (j->inotify_fd < 0) { | |
1150 | r = -errno; | |
1151 | goto fail; | |
1152 | } | |
1153 | ||
260a2be4 | 1154 | j->files = hashmap_new(string_hash_func, string_compare_func); |
3fbf9cbb LP |
1155 | if (!j->files) { |
1156 | r = -ENOMEM; | |
260a2be4 | 1157 | goto fail; |
3fbf9cbb LP |
1158 | } |
1159 | ||
50f20cfd LP |
1160 | j->inotify_wd_dirs = hashmap_new(trivial_hash_func, trivial_compare_func); |
1161 | j->inotify_wd_roots = hashmap_new(trivial_hash_func, trivial_compare_func); | |
1162 | ||
1163 | if (!j->inotify_wd_dirs || !j->inotify_wd_roots) { | |
1164 | r = -ENOMEM; | |
1165 | goto fail; | |
1166 | } | |
1167 | ||
3fbf9cbb LP |
1168 | /* We ignore most errors here, since the idea is to only open |
1169 | * what's actually accessible, and ignore the rest. */ | |
260a2be4 | 1170 | |
87d2c1ff LP |
1171 | NULSTR_FOREACH(p, search_paths) { |
1172 | DIR *d; | |
1173 | ||
1174 | d = opendir(p); | |
1175 | if (!d) { | |
3fbf9cbb LP |
1176 | if (errno != ENOENT) |
1177 | log_debug("Failed to open %s: %m", p); | |
87d2c1ff LP |
1178 | continue; |
1179 | } | |
1180 | ||
50f20cfd LP |
1181 | add_root_wd(j, p); |
1182 | ||
87d2c1ff LP |
1183 | for (;;) { |
1184 | struct dirent buf, *de; | |
3fbf9cbb | 1185 | sd_id128_t id; |
87d2c1ff | 1186 | |
3fbf9cbb LP |
1187 | r = readdir_r(d, &buf, &de); |
1188 | if (r != 0 || !de) | |
87d2c1ff LP |
1189 | break; |
1190 | ||
3fbf9cbb LP |
1191 | if (dirent_is_file_with_suffix(de, ".journal")) { |
1192 | r = add_file(j, p, NULL, de->d_name); | |
1193 | if (r < 0) | |
1194 | log_debug("Failed to add file %s/%s: %s", p, de->d_name, strerror(-r)); | |
87d2c1ff | 1195 | |
3fbf9cbb LP |
1196 | } else if ((de->d_type == DT_DIR || de->d_type == DT_UNKNOWN) && |
1197 | sd_id128_from_string(de->d_name, &id) >= 0) { | |
87d2c1ff | 1198 | |
3fbf9cbb LP |
1199 | r = add_directory(j, p, de->d_name); |
1200 | if (r < 0) | |
1201 | log_debug("Failed to add directory %s/%s: %s", p, de->d_name, strerror(-r)); | |
260a2be4 LP |
1202 | } |
1203 | } | |
3fbf9cbb LP |
1204 | |
1205 | closedir(d); | |
87d2c1ff LP |
1206 | } |
1207 | ||
1208 | *ret = j; | |
1209 | return 0; | |
1210 | ||
1211 | fail: | |
1212 | sd_journal_close(j); | |
1213 | ||
1214 | return r; | |
1215 | }; | |
1216 | ||
1217 | void sd_journal_close(sd_journal *j) { | |
1218 | assert(j); | |
1219 | ||
50f20cfd LP |
1220 | if (j->inotify_wd_dirs) { |
1221 | void *k; | |
1222 | ||
1223 | while ((k = hashmap_first_key(j->inotify_wd_dirs))) | |
1224 | remove_directory_wd(j, PTR_TO_INT(k)); | |
1225 | ||
1226 | hashmap_free(j->inotify_wd_dirs); | |
1227 | } | |
1228 | ||
1229 | if (j->inotify_wd_roots) { | |
1230 | void *k; | |
1231 | ||
1232 | while ((k = hashmap_first_key(j->inotify_wd_roots))) | |
1233 | remove_root_wd(j, PTR_TO_INT(k)); | |
1234 | ||
1235 | hashmap_free(j->inotify_wd_roots); | |
1236 | } | |
1237 | ||
260a2be4 LP |
1238 | if (j->files) { |
1239 | JournalFile *f; | |
1240 | ||
1241 | while ((f = hashmap_steal_first(j->files))) | |
1242 | journal_file_close(f); | |
1243 | ||
1244 | hashmap_free(j->files); | |
1245 | } | |
87d2c1ff | 1246 | |
1cc101f1 LP |
1247 | sd_journal_flush_matches(j); |
1248 | ||
50f20cfd LP |
1249 | if (j->inotify_fd >= 0) |
1250 | close_nointr_nofail(j->inotify_fd); | |
1251 | ||
87d2c1ff LP |
1252 | free(j); |
1253 | } | |
3fbf9cbb LP |
1254 | |
1255 | int sd_journal_get_realtime_usec(sd_journal *j, uint64_t *ret) { | |
1256 | Object *o; | |
1257 | JournalFile *f; | |
1258 | int r; | |
1259 | ||
1260 | assert(j); | |
1261 | assert(ret); | |
1262 | ||
1263 | f = j->current_file; | |
1264 | if (!f) | |
de190aef | 1265 | return -EADDRNOTAVAIL; |
3fbf9cbb LP |
1266 | |
1267 | if (f->current_offset <= 0) | |
de190aef | 1268 | return -EADDRNOTAVAIL; |
3fbf9cbb | 1269 | |
de190aef | 1270 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); |
3fbf9cbb LP |
1271 | if (r < 0) |
1272 | return r; | |
1273 | ||
1274 | *ret = le64toh(o->entry.realtime); | |
de190aef | 1275 | return 0; |
3fbf9cbb LP |
1276 | } |
1277 | ||
de190aef | 1278 | int sd_journal_get_monotonic_usec(sd_journal *j, uint64_t *ret, sd_id128_t *ret_boot_id) { |
3fbf9cbb LP |
1279 | Object *o; |
1280 | JournalFile *f; | |
1281 | int r; | |
1282 | sd_id128_t id; | |
1283 | ||
1284 | assert(j); | |
1285 | assert(ret); | |
1286 | ||
1287 | f = j->current_file; | |
1288 | if (!f) | |
de190aef | 1289 | return -EADDRNOTAVAIL; |
3fbf9cbb LP |
1290 | |
1291 | if (f->current_offset <= 0) | |
de190aef | 1292 | return -EADDRNOTAVAIL; |
3fbf9cbb | 1293 | |
de190aef | 1294 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); |
3fbf9cbb LP |
1295 | if (r < 0) |
1296 | return r; | |
1297 | ||
de190aef LP |
1298 | if (ret_boot_id) |
1299 | *ret_boot_id = o->entry.boot_id; | |
1300 | else { | |
1301 | r = sd_id128_get_boot(&id); | |
1302 | if (r < 0) | |
1303 | return r; | |
3fbf9cbb | 1304 | |
de190aef LP |
1305 | if (!sd_id128_equal(id, o->entry.boot_id)) |
1306 | return -ENOENT; | |
1307 | } | |
3fbf9cbb LP |
1308 | |
1309 | *ret = le64toh(o->entry.monotonic); | |
de190aef | 1310 | return 0; |
3fbf9cbb LP |
1311 | } |
1312 | ||
8725d60a | 1313 | int sd_journal_get_data(sd_journal *j, const char *field, const void **data, size_t *size) { |
3fbf9cbb LP |
1314 | JournalFile *f; |
1315 | uint64_t i, n; | |
1316 | size_t field_length; | |
1317 | int r; | |
1318 | Object *o; | |
1319 | ||
1320 | assert(j); | |
1321 | assert(field); | |
1322 | assert(data); | |
1323 | assert(size); | |
1324 | ||
1325 | if (isempty(field) || strchr(field, '=')) | |
1326 | return -EINVAL; | |
1327 | ||
1328 | f = j->current_file; | |
1329 | if (!f) | |
de190aef | 1330 | return -EADDRNOTAVAIL; |
3fbf9cbb LP |
1331 | |
1332 | if (f->current_offset <= 0) | |
de190aef | 1333 | return -EADDRNOTAVAIL; |
3fbf9cbb | 1334 | |
de190aef | 1335 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); |
3fbf9cbb LP |
1336 | if (r < 0) |
1337 | return r; | |
1338 | ||
1339 | field_length = strlen(field); | |
1340 | ||
1341 | n = journal_file_entry_n_items(o); | |
1342 | for (i = 0; i < n; i++) { | |
de190aef | 1343 | uint64_t p, l, le_hash; |
3fbf9cbb LP |
1344 | size_t t; |
1345 | ||
1346 | p = le64toh(o->entry.items[i].object_offset); | |
de190aef LP |
1347 | le_hash = o->entry.items[j->current_field].hash; |
1348 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
3fbf9cbb LP |
1349 | if (r < 0) |
1350 | return r; | |
1351 | ||
de190aef | 1352 | if (le_hash != o->data.hash) |
de7b95cd LP |
1353 | return -EBADMSG; |
1354 | ||
3fbf9cbb LP |
1355 | l = le64toh(o->object.size) - offsetof(Object, data.payload); |
1356 | ||
161e54f8 LP |
1357 | if (l >= field_length+1 && |
1358 | memcmp(o->data.payload, field, field_length) == 0 && | |
1359 | o->data.payload[field_length] == '=') { | |
3fbf9cbb | 1360 | |
161e54f8 | 1361 | t = (size_t) l; |
3fbf9cbb | 1362 | |
161e54f8 LP |
1363 | if ((uint64_t) t != l) |
1364 | return -E2BIG; | |
3fbf9cbb | 1365 | |
161e54f8 LP |
1366 | *data = o->data.payload; |
1367 | *size = t; | |
3fbf9cbb | 1368 | |
de190aef | 1369 | return 0; |
161e54f8 | 1370 | } |
3fbf9cbb | 1371 | |
de190aef | 1372 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); |
161e54f8 LP |
1373 | if (r < 0) |
1374 | return r; | |
3fbf9cbb LP |
1375 | } |
1376 | ||
de190aef | 1377 | return -ENOENT; |
3fbf9cbb LP |
1378 | } |
1379 | ||
8725d60a | 1380 | int sd_journal_enumerate_data(sd_journal *j, const void **data, size_t *size) { |
3fbf9cbb | 1381 | JournalFile *f; |
de190aef | 1382 | uint64_t p, l, n, le_hash; |
3fbf9cbb LP |
1383 | int r; |
1384 | Object *o; | |
de190aef | 1385 | size_t t; |
3fbf9cbb LP |
1386 | |
1387 | assert(j); | |
1388 | assert(data); | |
1389 | assert(size); | |
1390 | ||
1391 | f = j->current_file; | |
1392 | if (!f) | |
de190aef | 1393 | return -EADDRNOTAVAIL; |
3fbf9cbb LP |
1394 | |
1395 | if (f->current_offset <= 0) | |
de190aef | 1396 | return -EADDRNOTAVAIL; |
3fbf9cbb | 1397 | |
de190aef | 1398 | r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o); |
3fbf9cbb LP |
1399 | if (r < 0) |
1400 | return r; | |
1401 | ||
1402 | n = journal_file_entry_n_items(o); | |
7210bfb3 | 1403 | if (j->current_field >= n) |
3fbf9cbb LP |
1404 | return 0; |
1405 | ||
7210bfb3 | 1406 | p = le64toh(o->entry.items[j->current_field].object_offset); |
de190aef LP |
1407 | le_hash = o->entry.items[j->current_field].hash; |
1408 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
3fbf9cbb LP |
1409 | if (r < 0) |
1410 | return r; | |
1411 | ||
de190aef | 1412 | if (le_hash != o->data.hash) |
de7b95cd LP |
1413 | return -EBADMSG; |
1414 | ||
3fbf9cbb LP |
1415 | l = le64toh(o->object.size) - offsetof(Object, data.payload); |
1416 | t = (size_t) l; | |
1417 | ||
1418 | /* We can't read objects larger than 4G on a 32bit machine */ | |
1419 | if ((uint64_t) t != l) | |
1420 | return -E2BIG; | |
1421 | ||
1422 | *data = o->data.payload; | |
1423 | *size = t; | |
1424 | ||
7210bfb3 | 1425 | j->current_field ++; |
3fbf9cbb LP |
1426 | |
1427 | return 1; | |
1428 | } | |
c2373f84 | 1429 | |
de190aef | 1430 | void sd_journal_restart_data(sd_journal *j) { |
c2373f84 | 1431 | assert(j); |
8725d60a LP |
1432 | |
1433 | j->current_field = 0; | |
c2373f84 | 1434 | } |
50f20cfd LP |
1435 | |
1436 | int sd_journal_get_fd(sd_journal *j) { | |
1437 | assert(j); | |
1438 | ||
1439 | return j->inotify_fd; | |
1440 | } | |
1441 | ||
1442 | static void process_inotify_event(sd_journal *j, struct inotify_event *e) { | |
1443 | char *p; | |
1444 | int r; | |
1445 | ||
1446 | assert(j); | |
1447 | assert(e); | |
1448 | ||
1449 | /* Is this a subdirectory we watch? */ | |
1450 | p = hashmap_get(j->inotify_wd_dirs, INT_TO_PTR(e->wd)); | |
1451 | if (p) { | |
1452 | ||
1453 | if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) { | |
1454 | ||
1455 | /* Event for a journal file */ | |
1456 | ||
1457 | if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) { | |
1458 | r = add_file(j, p, NULL, e->name); | |
1459 | if (r < 0) | |
1460 | log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r)); | |
1461 | } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) { | |
1462 | ||
1463 | r = remove_file(j, p, NULL, e->name); | |
1464 | if (r < 0) | |
1465 | log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r)); | |
1466 | } | |
1467 | ||
1468 | } else if (e->len == 0) { | |
1469 | ||
1470 | /* Event for the directory itself */ | |
1471 | ||
1472 | if (e->mask & (IN_DELETE_SELF|IN_MOVE_SELF|IN_UNMOUNT)) | |
1473 | remove_directory_wd(j, e->wd); | |
1474 | } | |
1475 | ||
1476 | return; | |
1477 | } | |
1478 | ||
1479 | /* Must be the root directory then? */ | |
1480 | p = hashmap_get(j->inotify_wd_roots, INT_TO_PTR(e->wd)); | |
1481 | if (p) { | |
1482 | sd_id128_t id; | |
1483 | ||
1484 | if (!(e->mask & IN_ISDIR) && e->len > 0 && endswith(e->name, ".journal")) { | |
1485 | ||
1486 | /* Event for a journal file */ | |
1487 | ||
1488 | if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) { | |
1489 | r = add_file(j, p, NULL, e->name); | |
1490 | if (r < 0) | |
1491 | log_debug("Failed to add file %s/%s: %s", p, e->name, strerror(-r)); | |
1492 | } else if (e->mask & (IN_DELETE|IN_UNMOUNT)) { | |
1493 | ||
1494 | r = remove_file(j, p, NULL, e->name); | |
1495 | if (r < 0) | |
1496 | log_debug("Failed to remove file %s/%s: %s", p, e->name, strerror(-r)); | |
1497 | } | |
1498 | ||
1499 | } else if ((e->mask & IN_ISDIR) && e->len > 0 && sd_id128_from_string(e->name, &id) >= 0) { | |
1500 | ||
1501 | /* Event for subdirectory */ | |
1502 | ||
1503 | if (e->mask & (IN_CREATE|IN_MOVED_TO|IN_MODIFY|IN_ATTRIB)) { | |
1504 | ||
1505 | r = add_directory(j, p, e->name); | |
1506 | if (r < 0) | |
1507 | log_debug("Failed to add directory %s/%s: %s", p, e->name, strerror(-r)); | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | return; | |
1512 | } | |
1513 | ||
1514 | if (e->mask & IN_IGNORED) | |
1515 | return; | |
1516 | ||
1517 | log_warning("Unknown inotify event."); | |
1518 | } | |
1519 | ||
1520 | int sd_journal_process(sd_journal *j) { | |
1521 | uint8_t buffer[sizeof(struct inotify_event) + FILENAME_MAX]; | |
1522 | ||
1523 | assert(j); | |
1524 | ||
1525 | for (;;) { | |
1526 | struct inotify_event *e; | |
1527 | ssize_t l; | |
1528 | ||
1529 | l = read(j->inotify_fd, buffer, sizeof(buffer)); | |
1530 | if (l < 0) { | |
1531 | if (errno == EINTR || errno == EAGAIN) | |
1532 | return 0; | |
1533 | ||
1534 | return -errno; | |
1535 | } | |
1536 | ||
1537 | e = (struct inotify_event*) buffer; | |
1538 | while (l > 0) { | |
1539 | size_t step; | |
1540 | ||
1541 | process_inotify_event(j, e); | |
1542 | ||
1543 | step = sizeof(struct inotify_event) + e->len; | |
1544 | assert(step <= (size_t) l); | |
1545 | ||
1546 | e = (struct inotify_event*) ((uint8_t*) e + step); | |
1547 | l -= step; | |
1548 | } | |
1549 | } | |
1550 | } |