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cec736d2 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 | ||
22 | #include <sys/mman.h> | |
23 | #include <errno.h> | |
24 | #include <sys/uio.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/statvfs.h> | |
27 | #include <fcntl.h> | |
28 | #include <stddef.h> | |
29 | ||
30 | #include "journal-def.h" | |
31 | #include "journal-file.h" | |
32 | #include "lookup3.h" | |
807e17f0 | 33 | #include "compress.h" |
cec736d2 | 34 | |
de190aef LP |
35 | #define DEFAULT_DATA_HASH_TABLE_SIZE (2047ULL*16ULL) |
36 | #define DEFAULT_FIELD_HASH_TABLE_SIZE (2047ULL*16ULL) | |
cec736d2 LP |
37 | |
38 | #define DEFAULT_WINDOW_SIZE (128ULL*1024ULL*1024ULL) | |
39 | ||
807e17f0 LP |
40 | #define COMPRESSION_SIZE_THRESHOLD (64ULL) |
41 | ||
cec736d2 LP |
42 | static const char signature[] = { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' }; |
43 | ||
44 | #define ALIGN64(x) (((x) + 7ULL) & ~7ULL) | |
45 | ||
46 | void journal_file_close(JournalFile *f) { | |
de190aef | 47 | int t; |
cec736d2 | 48 | |
de190aef | 49 | assert(f); |
cec736d2 | 50 | |
de190aef LP |
51 | if (f->header && f->writable) |
52 | f->header->state = STATE_OFFLINE; | |
cec736d2 | 53 | |
cec736d2 | 54 | |
de190aef LP |
55 | for (t = 0; t < _WINDOW_MAX; t++) |
56 | if (f->windows[t].ptr) | |
57 | munmap(f->windows[t].ptr, f->windows[t].size); | |
cec736d2 | 58 | |
0ac38b70 LP |
59 | if (f->fd >= 0) |
60 | close_nointr_nofail(f->fd); | |
61 | ||
cec736d2 | 62 | free(f->path); |
807e17f0 LP |
63 | |
64 | #ifdef HAVE_XZ | |
65 | free(f->compress_buffer); | |
66 | #endif | |
67 | ||
cec736d2 LP |
68 | free(f); |
69 | } | |
70 | ||
0ac38b70 | 71 | static int journal_file_init_header(JournalFile *f, JournalFile *template) { |
cec736d2 LP |
72 | Header h; |
73 | ssize_t k; | |
74 | int r; | |
75 | ||
76 | assert(f); | |
77 | ||
78 | zero(h); | |
79 | memcpy(h.signature, signature, 8); | |
80 | h.arena_offset = htole64(ALIGN64(sizeof(h))); | |
cec736d2 LP |
81 | |
82 | r = sd_id128_randomize(&h.file_id); | |
83 | if (r < 0) | |
84 | return r; | |
85 | ||
0ac38b70 LP |
86 | if (template) { |
87 | h.seqnum_id = template->header->seqnum_id; | |
88 | h.seqnum = template->header->seqnum; | |
89 | } else | |
90 | h.seqnum_id = h.file_id; | |
cec736d2 LP |
91 | |
92 | k = pwrite(f->fd, &h, sizeof(h), 0); | |
93 | if (k < 0) | |
94 | return -errno; | |
95 | ||
96 | if (k != sizeof(h)) | |
97 | return -EIO; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static int journal_file_refresh_header(JournalFile *f) { | |
103 | int r; | |
de190aef | 104 | sd_id128_t boot_id; |
cec736d2 LP |
105 | |
106 | assert(f); | |
107 | ||
108 | r = sd_id128_get_machine(&f->header->machine_id); | |
109 | if (r < 0) | |
110 | return r; | |
111 | ||
de190aef | 112 | r = sd_id128_get_boot(&boot_id); |
cec736d2 LP |
113 | if (r < 0) |
114 | return r; | |
115 | ||
de190aef LP |
116 | if (sd_id128_equal(boot_id, f->header->boot_id)) |
117 | f->tail_entry_monotonic_valid = true; | |
118 | ||
119 | f->header->boot_id = boot_id; | |
120 | ||
121 | f->header->state = STATE_ONLINE; | |
cec736d2 LP |
122 | return 0; |
123 | } | |
124 | ||
125 | static int journal_file_verify_header(JournalFile *f) { | |
126 | assert(f); | |
127 | ||
128 | if (memcmp(f->header, signature, 8)) | |
129 | return -EBADMSG; | |
130 | ||
807e17f0 LP |
131 | #ifdef HAVE_XZ |
132 | if ((le64toh(f->header->incompatible_flags) & ~HEADER_INCOMPATIBLE_COMPRESSED) != 0) | |
133 | return -EPROTONOSUPPORT; | |
134 | #else | |
cec736d2 LP |
135 | if (f->header->incompatible_flags != 0) |
136 | return -EPROTONOSUPPORT; | |
807e17f0 | 137 | #endif |
cec736d2 LP |
138 | |
139 | if ((uint64_t) f->last_stat.st_size < (le64toh(f->header->arena_offset) + le64toh(f->header->arena_size))) | |
140 | return -ENODATA; | |
141 | ||
142 | if (f->writable) { | |
143 | uint32_t state; | |
144 | sd_id128_t machine_id; | |
145 | int r; | |
146 | ||
147 | r = sd_id128_get_machine(&machine_id); | |
148 | if (r < 0) | |
149 | return r; | |
150 | ||
151 | if (!sd_id128_equal(machine_id, f->header->machine_id)) | |
152 | return -EHOSTDOWN; | |
153 | ||
de190aef | 154 | state = f->header->state; |
cec736d2 LP |
155 | |
156 | if (state == STATE_ONLINE) | |
157 | log_debug("Journal file %s is already online. Assuming unclean closing. Ignoring.", f->path); | |
158 | else if (state == STATE_ARCHIVED) | |
159 | return -ESHUTDOWN; | |
160 | else if (state != STATE_OFFLINE) | |
161 | log_debug("Journal file %s has unknown state %u. Ignoring.", f->path, state); | |
162 | } | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size) { | |
cec736d2 LP |
168 | uint64_t old_size, new_size; |
169 | ||
170 | assert(f); | |
171 | ||
cec736d2 | 172 | /* We assume that this file is not sparse, and we know that |
38ac38b2 | 173 | * for sure, since we always call posix_fallocate() |
cec736d2 LP |
174 | * ourselves */ |
175 | ||
176 | old_size = | |
177 | le64toh(f->header->arena_offset) + | |
178 | le64toh(f->header->arena_size); | |
179 | ||
bc85bfee LP |
180 | new_size = PAGE_ALIGN(offset + size); |
181 | if (new_size < le64toh(f->header->arena_offset)) | |
182 | new_size = le64toh(f->header->arena_offset); | |
183 | ||
184 | if (new_size <= old_size) | |
cec736d2 LP |
185 | return 0; |
186 | ||
bc85bfee LP |
187 | if (f->metrics.max_size > 0 && |
188 | new_size > f->metrics.max_size) | |
189 | return -E2BIG; | |
cec736d2 | 190 | |
bc85bfee LP |
191 | if (new_size > f->metrics.min_size && |
192 | f->metrics.keep_free > 0) { | |
cec736d2 LP |
193 | struct statvfs svfs; |
194 | ||
195 | if (fstatvfs(f->fd, &svfs) >= 0) { | |
196 | uint64_t available; | |
197 | ||
198 | available = svfs.f_bfree * svfs.f_bsize; | |
199 | ||
bc85bfee LP |
200 | if (available >= f->metrics.keep_free) |
201 | available -= f->metrics.keep_free; | |
cec736d2 LP |
202 | else |
203 | available = 0; | |
204 | ||
205 | if (new_size - old_size > available) | |
206 | return -E2BIG; | |
207 | } | |
208 | } | |
209 | ||
bc85bfee LP |
210 | /* Note that the glibc fallocate() fallback is very |
211 | inefficient, hence we try to minimize the allocation area | |
212 | as we can. */ | |
38ac38b2 | 213 | if (posix_fallocate(f->fd, old_size, new_size - old_size) < 0) |
cec736d2 LP |
214 | return -errno; |
215 | ||
216 | if (fstat(f->fd, &f->last_stat) < 0) | |
217 | return -errno; | |
218 | ||
bc85bfee | 219 | f->header->arena_size = new_size - htole64(f->header->arena_offset); |
cec736d2 LP |
220 | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static int journal_file_map( | |
225 | JournalFile *f, | |
226 | uint64_t offset, | |
227 | uint64_t size, | |
228 | void **_window, | |
229 | uint64_t *_woffset, | |
230 | uint64_t *_wsize, | |
231 | void **ret) { | |
232 | ||
233 | uint64_t woffset, wsize; | |
234 | void *window; | |
235 | ||
236 | assert(f); | |
237 | assert(size > 0); | |
238 | assert(ret); | |
239 | ||
240 | woffset = offset & ~((uint64_t) page_size() - 1ULL); | |
241 | wsize = size + (offset - woffset); | |
242 | wsize = PAGE_ALIGN(wsize); | |
243 | ||
244 | window = mmap(NULL, wsize, f->prot, MAP_SHARED, f->fd, woffset); | |
245 | if (window == MAP_FAILED) | |
246 | return -errno; | |
247 | ||
248 | if (_window) | |
249 | *_window = window; | |
250 | ||
251 | if (_woffset) | |
252 | *_woffset = woffset; | |
253 | ||
254 | if (_wsize) | |
255 | *_wsize = wsize; | |
256 | ||
257 | *ret = (uint8_t*) window + (offset - woffset); | |
258 | ||
259 | return 0; | |
260 | } | |
261 | ||
de190aef | 262 | static int journal_file_move_to(JournalFile *f, int wt, uint64_t offset, uint64_t size, void **ret) { |
cec736d2 LP |
263 | void *p; |
264 | uint64_t delta; | |
265 | int r; | |
de190aef | 266 | Window *w; |
cec736d2 LP |
267 | |
268 | assert(f); | |
269 | assert(ret); | |
de190aef LP |
270 | assert(wt >= 0); |
271 | assert(wt < _WINDOW_MAX); | |
cec736d2 | 272 | |
de190aef | 273 | w = f->windows + wt; |
cec736d2 | 274 | |
de190aef LP |
275 | if (_likely_(w->ptr && |
276 | w->offset <= offset && | |
277 | w->offset + w->size >= offset + size)) { | |
278 | ||
279 | *ret = (uint8_t*) w->ptr + (offset - w->offset); | |
cec736d2 LP |
280 | return 0; |
281 | } | |
282 | ||
de190aef LP |
283 | if (w->ptr) { |
284 | if (munmap(w->ptr, w->size) < 0) | |
cec736d2 LP |
285 | return -errno; |
286 | ||
de190aef LP |
287 | w->ptr = NULL; |
288 | w->size = w->offset = 0; | |
cec736d2 LP |
289 | } |
290 | ||
291 | if (size < DEFAULT_WINDOW_SIZE) { | |
292 | /* If the default window size is larger then what was | |
293 | * asked for extend the mapping a bit in the hope to | |
294 | * minimize needed remappings later on. We add half | |
295 | * the window space before and half behind the | |
296 | * requested mapping */ | |
297 | ||
298 | delta = PAGE_ALIGN((DEFAULT_WINDOW_SIZE - size) / 2); | |
299 | ||
300 | if (offset < delta) | |
301 | delta = offset; | |
302 | ||
303 | offset -= delta; | |
304 | size += (DEFAULT_WINDOW_SIZE - delta); | |
305 | } else | |
306 | delta = 0; | |
307 | ||
308 | r = journal_file_map(f, | |
309 | offset, size, | |
de190aef LP |
310 | &w->ptr, &w->offset, &w->size, |
311 | &p); | |
cec736d2 LP |
312 | |
313 | if (r < 0) | |
314 | return r; | |
315 | ||
316 | *ret = (uint8_t*) p + delta; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static bool verify_hash(Object *o) { | |
de190aef | 321 | uint64_t h1, h2; |
cec736d2 LP |
322 | |
323 | assert(o); | |
324 | ||
807e17f0 | 325 | if (o->object.type == OBJECT_DATA && !(o->object.flags & OBJECT_COMPRESSED)) { |
cec736d2 | 326 | h1 = le64toh(o->data.hash); |
de190aef LP |
327 | h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload)); |
328 | } else if (o->object.type == OBJECT_FIELD) { | |
329 | h1 = le64toh(o->field.hash); | |
330 | h2 = hash64(o->field.payload, le64toh(o->object.size) - offsetof(Object, field.payload)); | |
331 | } else | |
332 | return true; | |
cec736d2 | 333 | |
de190aef | 334 | return h1 == h2; |
cec736d2 LP |
335 | } |
336 | ||
de190aef | 337 | int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret) { |
cec736d2 LP |
338 | int r; |
339 | void *t; | |
340 | Object *o; | |
341 | uint64_t s; | |
342 | ||
343 | assert(f); | |
344 | assert(ret); | |
de190aef | 345 | assert(type < _OBJECT_TYPE_MAX); |
cec736d2 | 346 | |
de190aef | 347 | r = journal_file_move_to(f, type >= 0 ? type : WINDOW_UNKNOWN, offset, sizeof(ObjectHeader), &t); |
cec736d2 LP |
348 | if (r < 0) |
349 | return r; | |
350 | ||
351 | o = (Object*) t; | |
352 | s = le64toh(o->object.size); | |
353 | ||
354 | if (s < sizeof(ObjectHeader)) | |
355 | return -EBADMSG; | |
356 | ||
de190aef | 357 | if (type >= 0 && o->object.type != type) |
cec736d2 LP |
358 | return -EBADMSG; |
359 | ||
360 | if (s > sizeof(ObjectHeader)) { | |
de190aef | 361 | r = journal_file_move_to(f, o->object.type, offset, s, &t); |
cec736d2 LP |
362 | if (r < 0) |
363 | return r; | |
364 | ||
365 | o = (Object*) t; | |
366 | } | |
367 | ||
368 | if (!verify_hash(o)) | |
369 | return -EBADMSG; | |
370 | ||
371 | *ret = o; | |
372 | return 0; | |
373 | } | |
374 | ||
c2373f84 | 375 | static uint64_t journal_file_seqnum(JournalFile *f, uint64_t *seqnum) { |
cec736d2 LP |
376 | uint64_t r; |
377 | ||
378 | assert(f); | |
379 | ||
380 | r = le64toh(f->header->seqnum) + 1; | |
c2373f84 LP |
381 | |
382 | if (seqnum) { | |
de190aef | 383 | /* If an external seqnum counter was passed, we update |
c2373f84 LP |
384 | * both the local and the external one, and set it to |
385 | * the maximum of both */ | |
386 | ||
387 | if (*seqnum + 1 > r) | |
388 | r = *seqnum + 1; | |
389 | ||
390 | *seqnum = r; | |
391 | } | |
392 | ||
cec736d2 LP |
393 | f->header->seqnum = htole64(r); |
394 | ||
de190aef LP |
395 | if (f->header->first_seqnum == 0) |
396 | f->header->first_seqnum = htole64(r); | |
397 | ||
cec736d2 LP |
398 | return r; |
399 | } | |
400 | ||
de190aef | 401 | static int journal_file_append_object(JournalFile *f, int type, uint64_t size, Object **ret, uint64_t *offset) { |
cec736d2 LP |
402 | int r; |
403 | uint64_t p; | |
404 | Object *tail, *o; | |
405 | void *t; | |
406 | ||
407 | assert(f); | |
408 | assert(size >= sizeof(ObjectHeader)); | |
409 | assert(offset); | |
410 | assert(ret); | |
411 | ||
412 | p = le64toh(f->header->tail_object_offset); | |
cec736d2 LP |
413 | if (p == 0) |
414 | p = le64toh(f->header->arena_offset); | |
415 | else { | |
de190aef | 416 | r = journal_file_move_to_object(f, -1, p, &tail); |
cec736d2 LP |
417 | if (r < 0) |
418 | return r; | |
419 | ||
420 | p += ALIGN64(le64toh(tail->object.size)); | |
421 | } | |
422 | ||
423 | r = journal_file_allocate(f, p, size); | |
424 | if (r < 0) | |
425 | return r; | |
426 | ||
de190aef | 427 | r = journal_file_move_to(f, type, p, size, &t); |
cec736d2 LP |
428 | if (r < 0) |
429 | return r; | |
430 | ||
431 | o = (Object*) t; | |
432 | ||
433 | zero(o->object); | |
de190aef | 434 | o->object.type = type; |
cec736d2 LP |
435 | o->object.size = htole64(size); |
436 | ||
437 | f->header->tail_object_offset = htole64(p); | |
cec736d2 LP |
438 | f->header->n_objects = htole64(le64toh(f->header->n_objects) + 1); |
439 | ||
440 | *ret = o; | |
441 | *offset = p; | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
de190aef | 446 | static int journal_file_setup_data_hash_table(JournalFile *f) { |
cec736d2 LP |
447 | uint64_t s, p; |
448 | Object *o; | |
449 | int r; | |
450 | ||
451 | assert(f); | |
452 | ||
de190aef LP |
453 | s = DEFAULT_DATA_HASH_TABLE_SIZE; |
454 | r = journal_file_append_object(f, | |
455 | OBJECT_DATA_HASH_TABLE, | |
456 | offsetof(Object, hash_table.items) + s, | |
457 | &o, &p); | |
cec736d2 LP |
458 | if (r < 0) |
459 | return r; | |
460 | ||
de190aef | 461 | memset(o->hash_table.items, 0, s); |
cec736d2 | 462 | |
de190aef LP |
463 | f->header->data_hash_table_offset = htole64(p + offsetof(Object, hash_table.items)); |
464 | f->header->data_hash_table_size = htole64(s); | |
cec736d2 LP |
465 | |
466 | return 0; | |
467 | } | |
468 | ||
de190aef | 469 | static int journal_file_setup_field_hash_table(JournalFile *f) { |
cec736d2 LP |
470 | uint64_t s, p; |
471 | Object *o; | |
472 | int r; | |
473 | ||
474 | assert(f); | |
475 | ||
de190aef LP |
476 | s = DEFAULT_FIELD_HASH_TABLE_SIZE; |
477 | r = journal_file_append_object(f, | |
478 | OBJECT_FIELD_HASH_TABLE, | |
479 | offsetof(Object, hash_table.items) + s, | |
480 | &o, &p); | |
cec736d2 LP |
481 | if (r < 0) |
482 | return r; | |
483 | ||
de190aef | 484 | memset(o->hash_table.items, 0, s); |
cec736d2 | 485 | |
de190aef LP |
486 | f->header->field_hash_table_offset = htole64(p + offsetof(Object, hash_table.items)); |
487 | f->header->field_hash_table_size = htole64(s); | |
cec736d2 LP |
488 | |
489 | return 0; | |
490 | } | |
491 | ||
de190aef | 492 | static int journal_file_map_data_hash_table(JournalFile *f) { |
cec736d2 LP |
493 | uint64_t s, p; |
494 | void *t; | |
495 | int r; | |
496 | ||
497 | assert(f); | |
498 | ||
de190aef LP |
499 | p = le64toh(f->header->data_hash_table_offset); |
500 | s = le64toh(f->header->data_hash_table_size); | |
cec736d2 | 501 | |
de190aef LP |
502 | r = journal_file_move_to(f, |
503 | WINDOW_DATA_HASH_TABLE, | |
504 | p, s, | |
505 | &t); | |
cec736d2 LP |
506 | if (r < 0) |
507 | return r; | |
508 | ||
de190aef | 509 | f->data_hash_table = t; |
cec736d2 LP |
510 | return 0; |
511 | } | |
512 | ||
de190aef | 513 | static int journal_file_map_field_hash_table(JournalFile *f) { |
cec736d2 LP |
514 | uint64_t s, p; |
515 | void *t; | |
516 | int r; | |
517 | ||
518 | assert(f); | |
519 | ||
de190aef LP |
520 | p = le64toh(f->header->field_hash_table_offset); |
521 | s = le64toh(f->header->field_hash_table_size); | |
cec736d2 | 522 | |
de190aef LP |
523 | r = journal_file_move_to(f, |
524 | WINDOW_FIELD_HASH_TABLE, | |
525 | p, s, | |
526 | &t); | |
cec736d2 LP |
527 | if (r < 0) |
528 | return r; | |
529 | ||
de190aef | 530 | f->field_hash_table = t; |
cec736d2 LP |
531 | return 0; |
532 | } | |
533 | ||
de190aef LP |
534 | static int journal_file_link_data(JournalFile *f, Object *o, uint64_t offset, uint64_t hash) { |
535 | uint64_t p, h; | |
cec736d2 LP |
536 | int r; |
537 | ||
538 | assert(f); | |
539 | assert(o); | |
540 | assert(offset > 0); | |
de190aef | 541 | assert(o->object.type == OBJECT_DATA); |
cec736d2 | 542 | |
de190aef LP |
543 | o->data.next_hash_offset = o->data.next_field_offset = 0; |
544 | o->data.entry_offset = o->data.entry_array_offset = 0; | |
545 | o->data.n_entries = 0; | |
cec736d2 | 546 | |
de190aef LP |
547 | h = hash % (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)); |
548 | p = le64toh(f->data_hash_table[h].head_hash_offset); | |
cec736d2 LP |
549 | if (p == 0) { |
550 | /* Only entry in the hash table is easy */ | |
de190aef | 551 | f->data_hash_table[h].head_hash_offset = htole64(offset); |
cec736d2 | 552 | } else { |
cec736d2 LP |
553 | /* Temporarily move back to the previous data object, |
554 | * to patch in pointer */ | |
555 | ||
de190aef | 556 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); |
cec736d2 LP |
557 | if (r < 0) |
558 | return r; | |
559 | ||
de190aef | 560 | o->data.next_hash_offset = htole64(offset); |
cec736d2 | 561 | |
de190aef | 562 | r = journal_file_move_to_object(f, OBJECT_DATA, offset, &o); |
cec736d2 LP |
563 | if (r < 0) |
564 | return r; | |
565 | } | |
566 | ||
de190aef | 567 | f->data_hash_table[h].tail_hash_offset = htole64(offset); |
cec736d2 LP |
568 | |
569 | return 0; | |
570 | } | |
571 | ||
de190aef LP |
572 | int journal_file_find_data_object_with_hash( |
573 | JournalFile *f, | |
574 | const void *data, uint64_t size, uint64_t hash, | |
575 | Object **ret, uint64_t *offset) { | |
576 | uint64_t p, osize, h; | |
cec736d2 LP |
577 | int r; |
578 | ||
579 | assert(f); | |
580 | assert(data || size == 0); | |
581 | ||
582 | osize = offsetof(Object, data.payload) + size; | |
583 | ||
bc85bfee LP |
584 | if (f->header->data_hash_table_size == 0) |
585 | return -EBADMSG; | |
586 | ||
de190aef LP |
587 | h = hash % (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)); |
588 | p = le64toh(f->data_hash_table[h].head_hash_offset); | |
cec736d2 | 589 | |
de190aef LP |
590 | while (p > 0) { |
591 | Object *o; | |
cec736d2 | 592 | |
de190aef | 593 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); |
cec736d2 LP |
594 | if (r < 0) |
595 | return r; | |
596 | ||
807e17f0 LP |
597 | if (le64toh(o->data.hash) != hash) |
598 | return -EBADMSG; | |
599 | ||
600 | if (o->object.flags & OBJECT_COMPRESSED) { | |
601 | #ifdef HAVE_XZ | |
602 | uint64_t l, rsize; | |
cec736d2 | 603 | |
807e17f0 LP |
604 | l = le64toh(o->object.size); |
605 | if (l <= offsetof(Object, data.payload)) | |
cec736d2 LP |
606 | return -EBADMSG; |
607 | ||
807e17f0 LP |
608 | l -= offsetof(Object, data.payload); |
609 | ||
610 | if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize)) | |
611 | return -EBADMSG; | |
612 | ||
613 | if (rsize == size && | |
614 | memcmp(f->compress_buffer, data, size) == 0) { | |
615 | ||
616 | if (ret) | |
617 | *ret = o; | |
618 | ||
619 | if (offset) | |
620 | *offset = p; | |
621 | ||
622 | return 1; | |
623 | } | |
624 | #else | |
625 | return -EPROTONOSUPPORT; | |
626 | #endif | |
627 | ||
628 | } else if (le64toh(o->object.size) == osize && | |
629 | memcmp(o->data.payload, data, size) == 0) { | |
630 | ||
cec736d2 LP |
631 | if (ret) |
632 | *ret = o; | |
633 | ||
634 | if (offset) | |
635 | *offset = p; | |
636 | ||
de190aef | 637 | return 1; |
cec736d2 LP |
638 | } |
639 | ||
640 | p = le64toh(o->data.next_hash_offset); | |
641 | } | |
642 | ||
de190aef LP |
643 | return 0; |
644 | } | |
645 | ||
646 | int journal_file_find_data_object( | |
647 | JournalFile *f, | |
648 | const void *data, uint64_t size, | |
649 | Object **ret, uint64_t *offset) { | |
650 | ||
651 | uint64_t hash; | |
652 | ||
653 | assert(f); | |
654 | assert(data || size == 0); | |
655 | ||
656 | hash = hash64(data, size); | |
657 | ||
658 | return journal_file_find_data_object_with_hash(f, | |
659 | data, size, hash, | |
660 | ret, offset); | |
661 | } | |
662 | ||
663 | static int journal_file_append_data(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset) { | |
664 | uint64_t hash, p; | |
665 | uint64_t osize; | |
666 | Object *o; | |
667 | int r; | |
807e17f0 | 668 | bool compressed = false; |
de190aef LP |
669 | |
670 | assert(f); | |
671 | assert(data || size == 0); | |
672 | ||
673 | hash = hash64(data, size); | |
674 | ||
675 | r = journal_file_find_data_object_with_hash(f, data, size, hash, &o, &p); | |
676 | if (r < 0) | |
677 | return r; | |
678 | else if (r > 0) { | |
679 | ||
680 | if (ret) | |
681 | *ret = o; | |
682 | ||
683 | if (offset) | |
684 | *offset = p; | |
685 | ||
686 | return 0; | |
687 | } | |
688 | ||
689 | osize = offsetof(Object, data.payload) + size; | |
690 | r = journal_file_append_object(f, OBJECT_DATA, osize, &o, &p); | |
cec736d2 LP |
691 | if (r < 0) |
692 | return r; | |
693 | ||
cec736d2 | 694 | o->data.hash = htole64(hash); |
807e17f0 LP |
695 | |
696 | #ifdef HAVE_XZ | |
697 | if (f->compress && | |
698 | size >= COMPRESSION_SIZE_THRESHOLD) { | |
699 | uint64_t rsize; | |
700 | ||
701 | compressed = compress_blob(data, size, o->data.payload, &rsize); | |
702 | ||
703 | if (compressed) { | |
704 | o->object.size = htole64(offsetof(Object, data.payload) + rsize); | |
705 | o->object.flags |= OBJECT_COMPRESSED; | |
706 | ||
707 | f->header->incompatible_flags = htole32(le32toh(f->header->incompatible_flags) | HEADER_INCOMPATIBLE_COMPRESSED); | |
708 | ||
709 | log_debug("Compressed data object %lu -> %lu", (unsigned long) size, (unsigned long) rsize); | |
710 | } | |
711 | } | |
712 | #endif | |
713 | ||
714 | if (!compressed) | |
715 | memcpy(o->data.payload, data, size); | |
cec736d2 | 716 | |
de190aef | 717 | r = journal_file_link_data(f, o, p, hash); |
cec736d2 LP |
718 | if (r < 0) |
719 | return r; | |
720 | ||
721 | if (ret) | |
722 | *ret = o; | |
723 | ||
724 | if (offset) | |
de190aef | 725 | *offset = p; |
cec736d2 LP |
726 | |
727 | return 0; | |
728 | } | |
729 | ||
730 | uint64_t journal_file_entry_n_items(Object *o) { | |
731 | assert(o); | |
732 | assert(o->object.type == htole64(OBJECT_ENTRY)); | |
733 | ||
734 | return (le64toh(o->object.size) - offsetof(Object, entry.items)) / sizeof(EntryItem); | |
735 | } | |
736 | ||
de190aef LP |
737 | static uint64_t journal_file_entry_array_n_items(Object *o) { |
738 | assert(o); | |
739 | assert(o->object.type == htole64(OBJECT_ENTRY_ARRAY)); | |
740 | ||
741 | return (le64toh(o->object.size) - offsetof(Object, entry_array.items)) / sizeof(uint64_t); | |
742 | } | |
743 | ||
744 | static int link_entry_into_array(JournalFile *f, | |
745 | uint64_t *first, | |
746 | uint64_t *idx, | |
747 | uint64_t p) { | |
cec736d2 | 748 | int r; |
de190aef LP |
749 | uint64_t n = 0, ap = 0, q, i, a, hidx; |
750 | Object *o; | |
751 | ||
cec736d2 | 752 | assert(f); |
de190aef LP |
753 | assert(first); |
754 | assert(idx); | |
755 | assert(p > 0); | |
cec736d2 | 756 | |
de190aef LP |
757 | a = le64toh(*first); |
758 | i = hidx = le64toh(*idx); | |
759 | while (a > 0) { | |
760 | ||
761 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o); | |
762 | if (r < 0) | |
763 | return r; | |
cec736d2 | 764 | |
de190aef LP |
765 | n = journal_file_entry_array_n_items(o); |
766 | if (i < n) { | |
767 | o->entry_array.items[i] = htole64(p); | |
768 | *idx = htole64(hidx + 1); | |
769 | return 0; | |
770 | } | |
cec736d2 | 771 | |
de190aef LP |
772 | i -= n; |
773 | ap = a; | |
774 | a = le64toh(o->entry_array.next_entry_array_offset); | |
775 | } | |
776 | ||
777 | if (hidx > n) | |
778 | n = (hidx+1) * 2; | |
779 | else | |
780 | n = n * 2; | |
781 | ||
782 | if (n < 4) | |
783 | n = 4; | |
784 | ||
785 | r = journal_file_append_object(f, OBJECT_ENTRY_ARRAY, | |
786 | offsetof(Object, entry_array.items) + n * sizeof(uint64_t), | |
787 | &o, &q); | |
cec736d2 LP |
788 | if (r < 0) |
789 | return r; | |
790 | ||
de190aef | 791 | o->entry_array.items[i] = htole64(p); |
cec736d2 | 792 | |
de190aef LP |
793 | if (ap == 0) |
794 | *first = q; | |
cec736d2 | 795 | else { |
de190aef | 796 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, ap, &o); |
cec736d2 LP |
797 | if (r < 0) |
798 | return r; | |
799 | ||
de190aef LP |
800 | o->entry_array.next_entry_array_offset = htole64(q); |
801 | } | |
cec736d2 | 802 | |
de190aef LP |
803 | *idx = htole64(hidx + 1); |
804 | ||
805 | return 0; | |
806 | } | |
cec736d2 | 807 | |
de190aef LP |
808 | static int link_entry_into_array_plus_one(JournalFile *f, |
809 | uint64_t *extra, | |
810 | uint64_t *first, | |
811 | uint64_t *idx, | |
812 | uint64_t p) { | |
813 | ||
814 | int r; | |
815 | ||
816 | assert(f); | |
817 | assert(extra); | |
818 | assert(first); | |
819 | assert(idx); | |
820 | assert(p > 0); | |
821 | ||
822 | if (*idx == 0) | |
823 | *extra = htole64(p); | |
824 | else { | |
825 | uint64_t i; | |
826 | ||
827 | i = le64toh(*idx) - 1; | |
828 | r = link_entry_into_array(f, first, &i, p); | |
829 | if (r < 0) | |
830 | return r; | |
cec736d2 LP |
831 | } |
832 | ||
de190aef LP |
833 | *idx = htole64(le64toh(*idx) + 1); |
834 | return 0; | |
835 | } | |
836 | ||
837 | static int journal_file_link_entry_item(JournalFile *f, Object *o, uint64_t offset, uint64_t i) { | |
838 | uint64_t p; | |
839 | int r; | |
840 | assert(f); | |
841 | assert(o); | |
842 | assert(offset > 0); | |
843 | ||
844 | p = le64toh(o->entry.items[i].object_offset); | |
845 | if (p == 0) | |
846 | return -EINVAL; | |
847 | ||
848 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
cec736d2 LP |
849 | if (r < 0) |
850 | return r; | |
851 | ||
de190aef LP |
852 | return link_entry_into_array_plus_one(f, |
853 | &o->data.entry_offset, | |
854 | &o->data.entry_array_offset, | |
855 | &o->data.n_entries, | |
856 | offset); | |
cec736d2 LP |
857 | } |
858 | ||
859 | static int journal_file_link_entry(JournalFile *f, Object *o, uint64_t offset) { | |
de190aef | 860 | uint64_t n, i; |
cec736d2 LP |
861 | int r; |
862 | ||
863 | assert(f); | |
864 | assert(o); | |
865 | assert(offset > 0); | |
de190aef | 866 | assert(o->object.type == OBJECT_ENTRY); |
cec736d2 LP |
867 | |
868 | /* Link up the entry itself */ | |
de190aef LP |
869 | r = link_entry_into_array(f, |
870 | &f->header->entry_array_offset, | |
871 | &f->header->n_entries, | |
872 | offset); | |
873 | if (r < 0) | |
874 | return r; | |
cec736d2 | 875 | |
bc85bfee | 876 | log_error("=> %s seqnr=%lu n_entries=%lu", f->path, (unsigned long) o->entry.seqnum, (unsigned long) f->header->n_entries); |
cec736d2 | 877 | |
de190aef | 878 | if (f->header->head_entry_realtime == 0) |
0ac38b70 | 879 | f->header->head_entry_realtime = o->entry.realtime; |
cec736d2 | 880 | |
0ac38b70 | 881 | f->header->tail_entry_realtime = o->entry.realtime; |
de190aef LP |
882 | f->header->tail_entry_monotonic = o->entry.monotonic; |
883 | ||
884 | f->tail_entry_monotonic_valid = true; | |
cec736d2 LP |
885 | |
886 | /* Link up the items */ | |
887 | n = journal_file_entry_n_items(o); | |
888 | for (i = 0; i < n; i++) { | |
889 | r = journal_file_link_entry_item(f, o, offset, i); | |
890 | if (r < 0) | |
891 | return r; | |
892 | } | |
893 | ||
cec736d2 LP |
894 | return 0; |
895 | } | |
896 | ||
897 | static int journal_file_append_entry_internal( | |
898 | JournalFile *f, | |
899 | const dual_timestamp *ts, | |
900 | uint64_t xor_hash, | |
901 | const EntryItem items[], unsigned n_items, | |
de190aef | 902 | uint64_t *seqnum, |
cec736d2 LP |
903 | Object **ret, uint64_t *offset) { |
904 | uint64_t np; | |
905 | uint64_t osize; | |
906 | Object *o; | |
907 | int r; | |
908 | ||
909 | assert(f); | |
910 | assert(items || n_items == 0); | |
de190aef | 911 | assert(ts); |
cec736d2 LP |
912 | |
913 | osize = offsetof(Object, entry.items) + (n_items * sizeof(EntryItem)); | |
914 | ||
de190aef | 915 | r = journal_file_append_object(f, OBJECT_ENTRY, osize, &o, &np); |
cec736d2 LP |
916 | if (r < 0) |
917 | return r; | |
918 | ||
de190aef | 919 | o->entry.seqnum = htole64(journal_file_seqnum(f, seqnum)); |
cec736d2 | 920 | memcpy(o->entry.items, items, n_items * sizeof(EntryItem)); |
de190aef LP |
921 | o->entry.realtime = htole64(ts->realtime); |
922 | o->entry.monotonic = htole64(ts->monotonic); | |
cec736d2 LP |
923 | o->entry.xor_hash = htole64(xor_hash); |
924 | o->entry.boot_id = f->header->boot_id; | |
925 | ||
926 | r = journal_file_link_entry(f, o, np); | |
927 | if (r < 0) | |
928 | return r; | |
929 | ||
930 | if (ret) | |
931 | *ret = o; | |
932 | ||
933 | if (offset) | |
934 | *offset = np; | |
935 | ||
936 | return 0; | |
937 | } | |
938 | ||
50f20cfd LP |
939 | static void journal_file_post_change(JournalFile *f) { |
940 | assert(f); | |
941 | ||
942 | /* inotify() does not receive IN_MODIFY events from file | |
943 | * accesses done via mmap(). After each access we hence | |
944 | * trigger IN_MODIFY by truncating the journal file to its | |
945 | * current size which triggers IN_MODIFY. */ | |
946 | ||
bc85bfee LP |
947 | __sync_synchronize(); |
948 | ||
50f20cfd LP |
949 | if (ftruncate(f->fd, f->last_stat.st_size) < 0) |
950 | log_error("Failed to to truncate file to its own size: %m"); | |
951 | } | |
952 | ||
de190aef | 953 | int journal_file_append_entry(JournalFile *f, const dual_timestamp *ts, const struct iovec iovec[], unsigned n_iovec, uint64_t *seqnum, Object **ret, uint64_t *offset) { |
cec736d2 LP |
954 | unsigned i; |
955 | EntryItem *items; | |
956 | int r; | |
957 | uint64_t xor_hash = 0; | |
de190aef | 958 | struct dual_timestamp _ts; |
cec736d2 LP |
959 | |
960 | assert(f); | |
961 | assert(iovec || n_iovec == 0); | |
962 | ||
de190aef LP |
963 | if (!f->writable) |
964 | return -EPERM; | |
965 | ||
966 | if (!ts) { | |
967 | dual_timestamp_get(&_ts); | |
968 | ts = &_ts; | |
969 | } | |
970 | ||
971 | if (f->tail_entry_monotonic_valid && | |
972 | ts->monotonic < le64toh(f->header->tail_entry_monotonic)) | |
973 | return -EINVAL; | |
974 | ||
975 | if (ts->realtime < le64toh(f->header->tail_entry_realtime)) | |
976 | return -EINVAL; | |
977 | ||
cec736d2 LP |
978 | items = new(EntryItem, n_iovec); |
979 | if (!items) | |
980 | return -ENOMEM; | |
981 | ||
982 | for (i = 0; i < n_iovec; i++) { | |
983 | uint64_t p; | |
984 | Object *o; | |
985 | ||
986 | r = journal_file_append_data(f, iovec[i].iov_base, iovec[i].iov_len, &o, &p); | |
987 | if (r < 0) | |
988 | goto finish; | |
989 | ||
990 | xor_hash ^= le64toh(o->data.hash); | |
991 | items[i].object_offset = htole64(p); | |
de7b95cd | 992 | items[i].hash = o->data.hash; |
cec736d2 LP |
993 | } |
994 | ||
de190aef | 995 | r = journal_file_append_entry_internal(f, ts, xor_hash, items, n_iovec, seqnum, ret, offset); |
cec736d2 | 996 | |
50f20cfd LP |
997 | journal_file_post_change(f); |
998 | ||
cec736d2 LP |
999 | finish: |
1000 | free(items); | |
1001 | ||
1002 | return r; | |
1003 | } | |
1004 | ||
de190aef LP |
1005 | static int generic_array_get(JournalFile *f, |
1006 | uint64_t first, | |
1007 | uint64_t i, | |
1008 | Object **ret, uint64_t *offset) { | |
1009 | ||
cec736d2 | 1010 | Object *o; |
de190aef | 1011 | uint64_t p, a; |
cec736d2 LP |
1012 | int r; |
1013 | ||
1014 | assert(f); | |
1015 | ||
de190aef LP |
1016 | a = first; |
1017 | while (a > 0) { | |
1018 | uint64_t n; | |
cec736d2 | 1019 | |
de190aef LP |
1020 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o); |
1021 | if (r < 0) | |
1022 | return r; | |
cec736d2 | 1023 | |
de190aef LP |
1024 | n = journal_file_entry_array_n_items(o); |
1025 | if (i < n) { | |
1026 | p = le64toh(o->entry_array.items[i]); | |
1027 | break; | |
cec736d2 LP |
1028 | } |
1029 | ||
de190aef LP |
1030 | i -= n; |
1031 | a = le64toh(o->entry_array.next_entry_array_offset); | |
1032 | } | |
1033 | ||
1034 | if (a <= 0 || p <= 0) | |
1035 | return 0; | |
1036 | ||
1037 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1038 | if (r < 0) | |
1039 | return r; | |
1040 | ||
1041 | if (ret) | |
1042 | *ret = o; | |
1043 | ||
1044 | if (offset) | |
1045 | *offset = p; | |
1046 | ||
1047 | return 1; | |
1048 | } | |
1049 | ||
1050 | static int generic_array_get_plus_one(JournalFile *f, | |
1051 | uint64_t extra, | |
1052 | uint64_t first, | |
1053 | uint64_t i, | |
1054 | Object **ret, uint64_t *offset) { | |
1055 | ||
1056 | Object *o; | |
1057 | ||
1058 | assert(f); | |
1059 | ||
1060 | if (i == 0) { | |
1061 | int r; | |
1062 | ||
1063 | r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o); | |
cec736d2 LP |
1064 | if (r < 0) |
1065 | return r; | |
1066 | ||
de190aef LP |
1067 | if (ret) |
1068 | *ret = o; | |
cec736d2 | 1069 | |
de190aef LP |
1070 | if (offset) |
1071 | *offset = extra; | |
cec736d2 | 1072 | |
de190aef | 1073 | return 1; |
cec736d2 LP |
1074 | } |
1075 | ||
de190aef LP |
1076 | return generic_array_get(f, first, i-1, ret, offset); |
1077 | } | |
cec736d2 | 1078 | |
de190aef LP |
1079 | enum { |
1080 | TEST_FOUND, | |
1081 | TEST_LEFT, | |
1082 | TEST_RIGHT | |
1083 | }; | |
cec736d2 | 1084 | |
de190aef LP |
1085 | static int generic_array_bisect(JournalFile *f, |
1086 | uint64_t first, | |
1087 | uint64_t n, | |
1088 | uint64_t needle, | |
1089 | int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle), | |
1090 | direction_t direction, | |
1091 | Object **ret, | |
1092 | uint64_t *offset, | |
1093 | uint64_t *idx) { | |
1094 | ||
1095 | uint64_t a, p, t = 0, i = 0, last_p = 0; | |
1096 | bool subtract_one = false; | |
1097 | Object *o, *array = NULL; | |
1098 | int r; | |
cec736d2 | 1099 | |
de190aef LP |
1100 | assert(f); |
1101 | assert(test_object); | |
cec736d2 | 1102 | |
de190aef LP |
1103 | a = first; |
1104 | while (a > 0) { | |
1105 | uint64_t left, right, k, lp; | |
1106 | ||
1107 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &array); | |
cec736d2 LP |
1108 | if (r < 0) |
1109 | return r; | |
1110 | ||
de190aef LP |
1111 | k = journal_file_entry_array_n_items(array); |
1112 | right = MIN(k, n); | |
1113 | if (right <= 0) | |
1114 | return 0; | |
cec736d2 | 1115 | |
de190aef LP |
1116 | i = right - 1; |
1117 | lp = p = le64toh(array->entry_array.items[i]); | |
1118 | if (p <= 0) | |
1119 | return -EBADMSG; | |
cec736d2 | 1120 | |
de190aef LP |
1121 | r = test_object(f, p, needle); |
1122 | if (r < 0) | |
1123 | return r; | |
cec736d2 | 1124 | |
de190aef LP |
1125 | if (r == TEST_FOUND) |
1126 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1127 | ||
1128 | if (r == TEST_RIGHT) { | |
1129 | left = 0; | |
1130 | right -= 1; | |
1131 | for (;;) { | |
1132 | if (left == right) { | |
1133 | if (direction == DIRECTION_UP) | |
1134 | subtract_one = true; | |
1135 | ||
1136 | i = left; | |
1137 | goto found; | |
1138 | } | |
1139 | ||
1140 | assert(left < right); | |
1141 | ||
1142 | i = (left + right) / 2; | |
1143 | p = le64toh(array->entry_array.items[i]); | |
1144 | if (p <= 0) | |
1145 | return -EBADMSG; | |
1146 | ||
1147 | r = test_object(f, p, needle); | |
1148 | if (r < 0) | |
1149 | return r; | |
cec736d2 | 1150 | |
de190aef LP |
1151 | if (r == TEST_FOUND) |
1152 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1153 | ||
1154 | if (r == TEST_RIGHT) | |
1155 | right = i; | |
1156 | else | |
1157 | left = i + 1; | |
1158 | } | |
1159 | } | |
1160 | ||
1161 | if (k > n) | |
cec736d2 LP |
1162 | return 0; |
1163 | ||
de190aef LP |
1164 | last_p = lp; |
1165 | ||
1166 | n -= k; | |
1167 | t += k; | |
1168 | a = le64toh(array->entry_array.next_entry_array_offset); | |
cec736d2 LP |
1169 | } |
1170 | ||
1171 | return 0; | |
de190aef LP |
1172 | |
1173 | found: | |
1174 | if (subtract_one && t == 0 && i == 0) | |
1175 | return 0; | |
1176 | ||
1177 | if (subtract_one && i == 0) | |
1178 | p = last_p; | |
1179 | else if (subtract_one) | |
1180 | p = le64toh(array->entry_array.items[i-1]); | |
1181 | else | |
1182 | p = le64toh(array->entry_array.items[i]); | |
1183 | ||
1184 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1185 | if (r < 0) | |
1186 | return r; | |
1187 | ||
1188 | if (ret) | |
1189 | *ret = o; | |
1190 | ||
1191 | if (offset) | |
1192 | *offset = p; | |
1193 | ||
1194 | if (idx) | |
1195 | *idx = t + i - (subtract_one ? 1 : 0); | |
1196 | ||
1197 | return 1; | |
cec736d2 LP |
1198 | } |
1199 | ||
de190aef LP |
1200 | static int generic_array_bisect_plus_one(JournalFile *f, |
1201 | uint64_t extra, | |
1202 | uint64_t first, | |
1203 | uint64_t n, | |
1204 | uint64_t needle, | |
1205 | int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle), | |
1206 | direction_t direction, | |
1207 | Object **ret, | |
1208 | uint64_t *offset, | |
1209 | uint64_t *idx) { | |
1210 | ||
cec736d2 LP |
1211 | int r; |
1212 | ||
1213 | assert(f); | |
de190aef | 1214 | assert(test_object); |
cec736d2 | 1215 | |
de190aef LP |
1216 | if (n <= 0) |
1217 | return 0; | |
cec736d2 | 1218 | |
de190aef LP |
1219 | /* This bisects the array in object 'first', but first checks |
1220 | * an extra */ | |
1221 | ||
1222 | r = test_object(f, extra, needle); | |
1223 | if (r < 0) | |
1224 | return r; | |
1225 | else if (r == TEST_FOUND) { | |
1226 | Object *o; | |
1227 | ||
1228 | r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o); | |
1229 | if (r < 0) | |
1230 | return r; | |
1231 | ||
1232 | if (ret) | |
1233 | *ret = o; | |
cec736d2 | 1234 | |
de190aef LP |
1235 | if (offset) |
1236 | *offset = extra; | |
1237 | } else if (r == TEST_RIGHT) | |
cec736d2 LP |
1238 | return 0; |
1239 | ||
de190aef LP |
1240 | r = generic_array_bisect(f, first, n-1, needle, test_object, direction, ret, offset, idx); |
1241 | ||
1242 | if (r > 0) | |
1243 | (*idx) ++; | |
1244 | ||
1245 | return r; | |
1246 | } | |
1247 | ||
1248 | static int test_object_seqnum(JournalFile *f, uint64_t p, uint64_t needle) { | |
1249 | Object *o; | |
1250 | int r; | |
1251 | ||
1252 | assert(f); | |
1253 | assert(p > 0); | |
1254 | ||
1255 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
cec736d2 LP |
1256 | if (r < 0) |
1257 | return r; | |
1258 | ||
de190aef LP |
1259 | if (le64toh(o->entry.seqnum) == needle) |
1260 | return TEST_FOUND; | |
1261 | else if (le64toh(o->entry.seqnum) < needle) | |
1262 | return TEST_LEFT; | |
1263 | else | |
1264 | return TEST_RIGHT; | |
1265 | } | |
cec736d2 | 1266 | |
de190aef LP |
1267 | int journal_file_move_to_entry_by_seqnum( |
1268 | JournalFile *f, | |
1269 | uint64_t seqnum, | |
1270 | direction_t direction, | |
1271 | Object **ret, | |
1272 | uint64_t *offset) { | |
1273 | ||
1274 | return generic_array_bisect(f, | |
1275 | le64toh(f->header->entry_array_offset), | |
1276 | le64toh(f->header->n_entries), | |
1277 | seqnum, | |
1278 | test_object_seqnum, | |
1279 | direction, | |
1280 | ret, offset, NULL); | |
1281 | } | |
cec736d2 | 1282 | |
de190aef LP |
1283 | static int test_object_realtime(JournalFile *f, uint64_t p, uint64_t needle) { |
1284 | Object *o; | |
1285 | int r; | |
1286 | ||
1287 | assert(f); | |
1288 | assert(p > 0); | |
1289 | ||
1290 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1291 | if (r < 0) | |
1292 | return r; | |
1293 | ||
1294 | if (le64toh(o->entry.realtime) == needle) | |
1295 | return TEST_FOUND; | |
1296 | else if (le64toh(o->entry.realtime) < needle) | |
1297 | return TEST_LEFT; | |
1298 | else | |
1299 | return TEST_RIGHT; | |
cec736d2 LP |
1300 | } |
1301 | ||
de190aef LP |
1302 | int journal_file_move_to_entry_by_realtime( |
1303 | JournalFile *f, | |
1304 | uint64_t realtime, | |
1305 | direction_t direction, | |
1306 | Object **ret, | |
1307 | uint64_t *offset) { | |
1308 | ||
1309 | return generic_array_bisect(f, | |
1310 | le64toh(f->header->entry_array_offset), | |
1311 | le64toh(f->header->n_entries), | |
1312 | realtime, | |
1313 | test_object_realtime, | |
1314 | direction, | |
1315 | ret, offset, NULL); | |
1316 | } | |
1317 | ||
1318 | static int test_object_monotonic(JournalFile *f, uint64_t p, uint64_t needle) { | |
1319 | Object *o; | |
1320 | int r; | |
1321 | ||
1322 | assert(f); | |
1323 | assert(p > 0); | |
1324 | ||
1325 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1326 | if (r < 0) | |
1327 | return r; | |
1328 | ||
1329 | if (le64toh(o->entry.monotonic) == needle) | |
1330 | return TEST_FOUND; | |
1331 | else if (le64toh(o->entry.monotonic) < needle) | |
1332 | return TEST_LEFT; | |
1333 | else | |
1334 | return TEST_RIGHT; | |
1335 | } | |
1336 | ||
1337 | int journal_file_move_to_entry_by_monotonic( | |
1338 | JournalFile *f, | |
1339 | sd_id128_t boot_id, | |
1340 | uint64_t monotonic, | |
1341 | direction_t direction, | |
1342 | Object **ret, | |
1343 | uint64_t *offset) { | |
1344 | ||
1345 | char t[8+32+1] = "_BOOT_ID="; | |
1346 | Object *o; | |
1347 | int r; | |
1348 | ||
1349 | sd_id128_to_string(boot_id, t + 8); | |
1350 | ||
1351 | r = journal_file_find_data_object(f, t, strlen(t), &o, NULL); | |
1352 | if (r < 0) | |
1353 | return r; | |
1354 | else if (r == 0) | |
1355 | return -ENOENT; | |
1356 | ||
1357 | return generic_array_bisect_plus_one(f, | |
1358 | le64toh(o->data.entry_offset), | |
1359 | le64toh(o->data.entry_array_offset), | |
1360 | le64toh(o->data.n_entries), | |
1361 | monotonic, | |
1362 | test_object_monotonic, | |
1363 | direction, | |
1364 | ret, offset, NULL); | |
1365 | } | |
1366 | ||
1367 | static int test_object_offset(JournalFile *f, uint64_t p, uint64_t needle) { | |
1368 | assert(f); | |
1369 | assert(p > 0); | |
1370 | ||
1371 | if (p == needle) | |
1372 | return TEST_FOUND; | |
1373 | else if (p < needle) | |
1374 | return TEST_LEFT; | |
1375 | else | |
1376 | return TEST_RIGHT; | |
1377 | } | |
1378 | ||
1379 | int journal_file_next_entry( | |
1380 | JournalFile *f, | |
1381 | Object *o, uint64_t p, | |
1382 | direction_t direction, | |
1383 | Object **ret, uint64_t *offset) { | |
1384 | ||
1385 | uint64_t i, n; | |
cec736d2 LP |
1386 | int r; |
1387 | ||
1388 | assert(f); | |
de190aef LP |
1389 | assert(p > 0 || !o); |
1390 | ||
1391 | n = le64toh(f->header->n_entries); | |
1392 | if (n <= 0) | |
1393 | return 0; | |
cec736d2 LP |
1394 | |
1395 | if (!o) | |
de190aef | 1396 | i = direction == DIRECTION_DOWN ? 0 : n - 1; |
cec736d2 | 1397 | else { |
de190aef | 1398 | if (o->object.type != OBJECT_ENTRY) |
cec736d2 LP |
1399 | return -EINVAL; |
1400 | ||
de190aef LP |
1401 | r = generic_array_bisect(f, |
1402 | le64toh(f->header->entry_array_offset), | |
1403 | le64toh(f->header->n_entries), | |
1404 | p, | |
1405 | test_object_offset, | |
1406 | DIRECTION_DOWN, | |
1407 | NULL, NULL, | |
1408 | &i); | |
1409 | if (r <= 0) | |
1410 | return r; | |
1411 | ||
1412 | if (direction == DIRECTION_DOWN) { | |
1413 | if (i >= n - 1) | |
1414 | return 0; | |
1415 | ||
1416 | i++; | |
1417 | } else { | |
1418 | if (i <= 0) | |
1419 | return 0; | |
1420 | ||
1421 | i--; | |
1422 | } | |
cec736d2 LP |
1423 | } |
1424 | ||
de190aef LP |
1425 | /* And jump to it */ |
1426 | return generic_array_get(f, | |
1427 | le64toh(f->header->entry_array_offset), | |
1428 | i, | |
1429 | ret, offset); | |
1430 | } | |
cec736d2 | 1431 | |
de190aef LP |
1432 | int journal_file_skip_entry( |
1433 | JournalFile *f, | |
1434 | Object *o, uint64_t p, | |
1435 | int64_t skip, | |
1436 | Object **ret, uint64_t *offset) { | |
1437 | ||
1438 | uint64_t i, n; | |
1439 | int r; | |
1440 | ||
1441 | assert(f); | |
1442 | assert(o); | |
1443 | assert(p > 0); | |
1444 | ||
1445 | if (o->object.type != OBJECT_ENTRY) | |
1446 | return -EINVAL; | |
1447 | ||
1448 | r = generic_array_bisect(f, | |
1449 | le64toh(f->header->entry_array_offset), | |
1450 | le64toh(f->header->n_entries), | |
1451 | p, | |
1452 | test_object_offset, | |
1453 | DIRECTION_DOWN, | |
1454 | NULL, NULL, | |
1455 | &i); | |
1456 | if (r <= 0) | |
cec736d2 LP |
1457 | return r; |
1458 | ||
de190aef LP |
1459 | /* Calculate new index */ |
1460 | if (skip < 0) { | |
1461 | if ((uint64_t) -skip >= i) | |
1462 | i = 0; | |
1463 | else | |
1464 | i = i - (uint64_t) -skip; | |
1465 | } else | |
1466 | i += (uint64_t) skip; | |
cec736d2 | 1467 | |
de190aef LP |
1468 | n = le64toh(f->header->n_entries); |
1469 | if (n <= 0) | |
1470 | return -EBADMSG; | |
cec736d2 | 1471 | |
de190aef LP |
1472 | if (i >= n) |
1473 | i = n-1; | |
1474 | ||
1475 | return generic_array_get(f, | |
1476 | le64toh(f->header->entry_array_offset), | |
1477 | i, | |
1478 | ret, offset); | |
cec736d2 LP |
1479 | } |
1480 | ||
de190aef LP |
1481 | int journal_file_next_entry_for_data( |
1482 | JournalFile *f, | |
1483 | Object *o, uint64_t p, | |
1484 | uint64_t data_offset, | |
1485 | direction_t direction, | |
1486 | Object **ret, uint64_t *offset) { | |
1487 | ||
1488 | uint64_t n, i; | |
cec736d2 | 1489 | int r; |
de190aef | 1490 | Object *d; |
cec736d2 LP |
1491 | |
1492 | assert(f); | |
de190aef | 1493 | assert(p > 0 || !o); |
cec736d2 | 1494 | |
de190aef | 1495 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
466ccd92 | 1496 | if (r < 0) |
de190aef | 1497 | return r; |
cec736d2 | 1498 | |
de190aef LP |
1499 | n = le64toh(d->data.n_entries); |
1500 | if (n <= 0) | |
1501 | return n; | |
cec736d2 | 1502 | |
de190aef LP |
1503 | if (!o) |
1504 | i = direction == DIRECTION_DOWN ? 0 : n - 1; | |
1505 | else { | |
1506 | if (o->object.type != OBJECT_ENTRY) | |
1507 | return -EINVAL; | |
cec736d2 | 1508 | |
de190aef LP |
1509 | r = generic_array_bisect_plus_one(f, |
1510 | le64toh(d->data.entry_offset), | |
1511 | le64toh(d->data.entry_array_offset), | |
1512 | le64toh(d->data.n_entries), | |
1513 | p, | |
1514 | test_object_offset, | |
1515 | DIRECTION_DOWN, | |
1516 | NULL, NULL, | |
1517 | &i); | |
1518 | ||
1519 | if (r <= 0) | |
cec736d2 LP |
1520 | return r; |
1521 | ||
de190aef LP |
1522 | if (direction == DIRECTION_DOWN) { |
1523 | if (i >= n - 1) | |
1524 | return 0; | |
cec736d2 | 1525 | |
de190aef LP |
1526 | i++; |
1527 | } else { | |
1528 | if (i <= 0) | |
1529 | return 0; | |
cec736d2 | 1530 | |
de190aef LP |
1531 | i--; |
1532 | } | |
cec736d2 | 1533 | |
de190aef | 1534 | } |
cec736d2 | 1535 | |
de190aef LP |
1536 | return generic_array_get_plus_one(f, |
1537 | le64toh(d->data.entry_offset), | |
1538 | le64toh(d->data.entry_array_offset), | |
1539 | i, | |
1540 | ret, offset); | |
1541 | } | |
cec736d2 | 1542 | |
de190aef LP |
1543 | int journal_file_move_to_entry_by_seqnum_for_data( |
1544 | JournalFile *f, | |
1545 | uint64_t data_offset, | |
1546 | uint64_t seqnum, | |
1547 | direction_t direction, | |
1548 | Object **ret, uint64_t *offset) { | |
cec736d2 | 1549 | |
de190aef LP |
1550 | Object *d; |
1551 | int r; | |
cec736d2 | 1552 | |
de190aef LP |
1553 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
1554 | if (r <= 0) | |
1555 | return r; | |
cec736d2 | 1556 | |
de190aef LP |
1557 | return generic_array_bisect_plus_one(f, |
1558 | le64toh(d->data.entry_offset), | |
1559 | le64toh(d->data.entry_array_offset), | |
1560 | le64toh(d->data.n_entries), | |
1561 | seqnum, | |
1562 | test_object_seqnum, | |
1563 | direction, | |
1564 | ret, offset, NULL); | |
1565 | } | |
cec736d2 | 1566 | |
de190aef LP |
1567 | int journal_file_move_to_entry_by_realtime_for_data( |
1568 | JournalFile *f, | |
1569 | uint64_t data_offset, | |
1570 | uint64_t realtime, | |
1571 | direction_t direction, | |
1572 | Object **ret, uint64_t *offset) { | |
1573 | ||
1574 | Object *d; | |
1575 | int r; | |
1576 | ||
1577 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); | |
1578 | if (r <= 0) | |
1579 | return r; | |
1580 | ||
1581 | return generic_array_bisect_plus_one(f, | |
1582 | le64toh(d->data.entry_offset), | |
1583 | le64toh(d->data.entry_array_offset), | |
1584 | le64toh(d->data.n_entries), | |
1585 | realtime, | |
1586 | test_object_realtime, | |
1587 | direction, | |
1588 | ret, offset, NULL); | |
cec736d2 LP |
1589 | } |
1590 | ||
1591 | void journal_file_dump(JournalFile *f) { | |
1592 | char a[33], b[33], c[33]; | |
1593 | Object *o; | |
1594 | int r; | |
1595 | uint64_t p; | |
1596 | ||
1597 | assert(f); | |
1598 | ||
de190aef LP |
1599 | printf("File Path: %s\n" |
1600 | "File ID: %s\n" | |
cec736d2 LP |
1601 | "Machine ID: %s\n" |
1602 | "Boot ID: %s\n" | |
de190aef LP |
1603 | "Arena size: %llu\n" |
1604 | "Objects: %lu\n" | |
1605 | "Entries: %lu\n", | |
1606 | f->path, | |
cec736d2 LP |
1607 | sd_id128_to_string(f->header->file_id, a), |
1608 | sd_id128_to_string(f->header->machine_id, b), | |
1609 | sd_id128_to_string(f->header->boot_id, c), | |
de190aef LP |
1610 | (unsigned long long) le64toh(f->header->arena_size), |
1611 | (unsigned long) le64toh(f->header->n_objects), | |
1612 | (unsigned long) le64toh(f->header->n_entries)); | |
cec736d2 | 1613 | |
de190aef | 1614 | p = le64toh(f->header->arena_offset); |
cec736d2 | 1615 | while (p != 0) { |
de190aef | 1616 | r = journal_file_move_to_object(f, -1, p, &o); |
cec736d2 LP |
1617 | if (r < 0) |
1618 | goto fail; | |
1619 | ||
1620 | switch (o->object.type) { | |
1621 | ||
1622 | case OBJECT_UNUSED: | |
1623 | printf("Type: OBJECT_UNUSED\n"); | |
1624 | break; | |
1625 | ||
1626 | case OBJECT_DATA: | |
1627 | printf("Type: OBJECT_DATA\n"); | |
1628 | break; | |
1629 | ||
1630 | case OBJECT_ENTRY: | |
3fbf9cbb LP |
1631 | printf("Type: OBJECT_ENTRY %llu %llu %llu\n", |
1632 | (unsigned long long) le64toh(o->entry.seqnum), | |
1633 | (unsigned long long) le64toh(o->entry.monotonic), | |
1634 | (unsigned long long) le64toh(o->entry.realtime)); | |
cec736d2 LP |
1635 | break; |
1636 | ||
de190aef LP |
1637 | case OBJECT_FIELD_HASH_TABLE: |
1638 | printf("Type: OBJECT_FIELD_HASH_TABLE\n"); | |
cec736d2 LP |
1639 | break; |
1640 | ||
de190aef LP |
1641 | case OBJECT_DATA_HASH_TABLE: |
1642 | printf("Type: OBJECT_DATA_HASH_TABLE\n"); | |
1643 | break; | |
1644 | ||
1645 | case OBJECT_ENTRY_ARRAY: | |
1646 | printf("Type: OBJECT_ENTRY_ARRAY\n"); | |
cec736d2 LP |
1647 | break; |
1648 | } | |
1649 | ||
807e17f0 LP |
1650 | if (o->object.flags & OBJECT_COMPRESSED) |
1651 | printf("Flags: COMPRESSED\n"); | |
1652 | ||
cec736d2 LP |
1653 | if (p == le64toh(f->header->tail_object_offset)) |
1654 | p = 0; | |
1655 | else | |
1656 | p = p + ALIGN64(le64toh(o->object.size)); | |
1657 | } | |
1658 | ||
1659 | return; | |
1660 | fail: | |
1661 | log_error("File corrupt"); | |
1662 | } | |
1663 | ||
1664 | int journal_file_open( | |
1665 | const char *fname, | |
1666 | int flags, | |
1667 | mode_t mode, | |
0ac38b70 | 1668 | JournalFile *template, |
cec736d2 LP |
1669 | JournalFile **ret) { |
1670 | ||
1671 | JournalFile *f; | |
1672 | int r; | |
1673 | bool newly_created = false; | |
1674 | ||
1675 | assert(fname); | |
1676 | ||
1677 | if ((flags & O_ACCMODE) != O_RDONLY && | |
1678 | (flags & O_ACCMODE) != O_RDWR) | |
1679 | return -EINVAL; | |
1680 | ||
1681 | f = new0(JournalFile, 1); | |
1682 | if (!f) | |
1683 | return -ENOMEM; | |
1684 | ||
0ac38b70 LP |
1685 | f->fd = -1; |
1686 | f->flags = flags; | |
1687 | f->mode = mode; | |
cec736d2 LP |
1688 | f->writable = (flags & O_ACCMODE) != O_RDONLY; |
1689 | f->prot = prot_from_flags(flags); | |
1690 | ||
bc85bfee LP |
1691 | f->metrics.max_size = DEFAULT_MAX_SIZE; |
1692 | f->metrics.min_size = DEFAULT_MIN_SIZE; | |
1693 | f->metrics.keep_free = DEFAULT_KEEP_FREE; | |
1694 | ||
cec736d2 LP |
1695 | f->path = strdup(fname); |
1696 | if (!f->path) { | |
1697 | r = -ENOMEM; | |
1698 | goto fail; | |
1699 | } | |
1700 | ||
0ac38b70 LP |
1701 | f->fd = open(f->path, f->flags|O_CLOEXEC, f->mode); |
1702 | if (f->fd < 0) { | |
1703 | r = -errno; | |
1704 | goto fail; | |
1705 | } | |
1706 | ||
cec736d2 LP |
1707 | if (fstat(f->fd, &f->last_stat) < 0) { |
1708 | r = -errno; | |
1709 | goto fail; | |
1710 | } | |
1711 | ||
1712 | if (f->last_stat.st_size == 0 && f->writable) { | |
1713 | newly_created = true; | |
1714 | ||
0ac38b70 | 1715 | r = journal_file_init_header(f, template); |
cec736d2 LP |
1716 | if (r < 0) |
1717 | goto fail; | |
1718 | ||
1719 | if (fstat(f->fd, &f->last_stat) < 0) { | |
1720 | r = -errno; | |
1721 | goto fail; | |
1722 | } | |
1723 | } | |
1724 | ||
1725 | if (f->last_stat.st_size < (off_t) sizeof(Header)) { | |
1726 | r = -EIO; | |
1727 | goto fail; | |
1728 | } | |
1729 | ||
1730 | f->header = mmap(NULL, PAGE_ALIGN(sizeof(Header)), prot_from_flags(flags), MAP_SHARED, f->fd, 0); | |
1731 | if (f->header == MAP_FAILED) { | |
1732 | f->header = NULL; | |
1733 | r = -errno; | |
1734 | goto fail; | |
1735 | } | |
1736 | ||
1737 | if (!newly_created) { | |
1738 | r = journal_file_verify_header(f); | |
1739 | if (r < 0) | |
1740 | goto fail; | |
1741 | } | |
1742 | ||
1743 | if (f->writable) { | |
1744 | r = journal_file_refresh_header(f); | |
1745 | if (r < 0) | |
1746 | goto fail; | |
1747 | } | |
1748 | ||
1749 | if (newly_created) { | |
1750 | ||
de190aef | 1751 | r = journal_file_setup_field_hash_table(f); |
cec736d2 LP |
1752 | if (r < 0) |
1753 | goto fail; | |
1754 | ||
de190aef | 1755 | r = journal_file_setup_data_hash_table(f); |
cec736d2 LP |
1756 | if (r < 0) |
1757 | goto fail; | |
1758 | } | |
1759 | ||
de190aef | 1760 | r = journal_file_map_field_hash_table(f); |
cec736d2 LP |
1761 | if (r < 0) |
1762 | goto fail; | |
1763 | ||
de190aef | 1764 | r = journal_file_map_data_hash_table(f); |
cec736d2 LP |
1765 | if (r < 0) |
1766 | goto fail; | |
1767 | ||
1768 | if (ret) | |
1769 | *ret = f; | |
1770 | ||
1771 | return 0; | |
1772 | ||
1773 | fail: | |
1774 | journal_file_close(f); | |
1775 | ||
1776 | return r; | |
1777 | } | |
0ac38b70 LP |
1778 | |
1779 | int journal_file_rotate(JournalFile **f) { | |
1780 | char *p; | |
1781 | size_t l; | |
1782 | JournalFile *old_file, *new_file = NULL; | |
1783 | int r; | |
1784 | ||
1785 | assert(f); | |
1786 | assert(*f); | |
1787 | ||
1788 | old_file = *f; | |
1789 | ||
1790 | if (!old_file->writable) | |
1791 | return -EINVAL; | |
1792 | ||
1793 | if (!endswith(old_file->path, ".journal")) | |
1794 | return -EINVAL; | |
1795 | ||
1796 | l = strlen(old_file->path); | |
1797 | ||
1798 | p = new(char, l + 1 + 16 + 1 + 32 + 1 + 16 + 1); | |
1799 | if (!p) | |
1800 | return -ENOMEM; | |
1801 | ||
1802 | memcpy(p, old_file->path, l - 8); | |
1803 | p[l-8] = '@'; | |
1804 | sd_id128_to_string(old_file->header->seqnum_id, p + l - 8 + 1); | |
1805 | snprintf(p + l - 8 + 1 + 32, 1 + 16 + 1 + 16 + 8 + 1, | |
1806 | "-%016llx-%016llx.journal", | |
1807 | (unsigned long long) le64toh((*f)->header->seqnum), | |
1808 | (unsigned long long) le64toh((*f)->header->tail_entry_realtime)); | |
1809 | ||
1810 | r = rename(old_file->path, p); | |
1811 | free(p); | |
1812 | ||
1813 | if (r < 0) | |
1814 | return -errno; | |
1815 | ||
1816 | old_file->header->state = le32toh(STATE_ARCHIVED); | |
1817 | ||
1818 | r = journal_file_open(old_file->path, old_file->flags, old_file->mode, old_file, &new_file); | |
1819 | journal_file_close(old_file); | |
1820 | ||
1821 | *f = new_file; | |
1822 | return r; | |
1823 | } | |
1824 | ||
1825 | struct vacuum_info { | |
1826 | off_t usage; | |
1827 | char *filename; | |
1828 | ||
1829 | uint64_t realtime; | |
1830 | sd_id128_t seqnum_id; | |
1831 | uint64_t seqnum; | |
1832 | }; | |
1833 | ||
1834 | static int vacuum_compare(const void *_a, const void *_b) { | |
1835 | const struct vacuum_info *a, *b; | |
1836 | ||
1837 | a = _a; | |
1838 | b = _b; | |
1839 | ||
1840 | if (sd_id128_equal(a->seqnum_id, b->seqnum_id)) { | |
1841 | if (a->seqnum < b->seqnum) | |
1842 | return -1; | |
1843 | else if (a->seqnum > b->seqnum) | |
1844 | return 1; | |
1845 | else | |
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | if (a->realtime < b->realtime) | |
1850 | return -1; | |
1851 | else if (a->realtime > b->realtime) | |
1852 | return 1; | |
1853 | else | |
1854 | return memcmp(&a->seqnum_id, &b->seqnum_id, 16); | |
1855 | } | |
1856 | ||
1857 | int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free) { | |
1858 | DIR *d; | |
1859 | int r = 0; | |
1860 | struct vacuum_info *list = NULL; | |
1861 | unsigned n_list = 0, n_allocated = 0, i; | |
1862 | uint64_t sum = 0; | |
1863 | ||
1864 | assert(directory); | |
1865 | ||
1866 | if (max_use <= 0) | |
1867 | max_use = DEFAULT_MAX_USE; | |
1868 | ||
1869 | d = opendir(directory); | |
1870 | if (!d) | |
1871 | return -errno; | |
1872 | ||
1873 | for (;;) { | |
1874 | int k; | |
1875 | struct dirent buf, *de; | |
1876 | size_t q; | |
1877 | struct stat st; | |
1878 | char *p; | |
1879 | unsigned long long seqnum, realtime; | |
1880 | sd_id128_t seqnum_id; | |
1881 | ||
1882 | k = readdir_r(d, &buf, &de); | |
1883 | if (k != 0) { | |
1884 | r = -k; | |
1885 | goto finish; | |
1886 | } | |
1887 | ||
1888 | if (!de) | |
1889 | break; | |
1890 | ||
1891 | if (!dirent_is_file_with_suffix(de, ".journal")) | |
1892 | continue; | |
1893 | ||
1894 | q = strlen(de->d_name); | |
1895 | ||
1896 | if (q < 1 + 32 + 1 + 16 + 1 + 16 + 8) | |
1897 | continue; | |
1898 | ||
1899 | if (de->d_name[q-8-16-1] != '-' || | |
1900 | de->d_name[q-8-16-1-16-1] != '-' || | |
1901 | de->d_name[q-8-16-1-16-1-32-1] != '@') | |
1902 | continue; | |
1903 | ||
1904 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
1905 | continue; | |
1906 | ||
1907 | if (!S_ISREG(st.st_mode)) | |
1908 | continue; | |
1909 | ||
1910 | p = strdup(de->d_name); | |
1911 | if (!p) { | |
1912 | r = -ENOMEM; | |
1913 | goto finish; | |
1914 | } | |
1915 | ||
1916 | de->d_name[q-8-16-1-16-1] = 0; | |
1917 | if (sd_id128_from_string(de->d_name + q-8-16-1-16-1-32, &seqnum_id) < 0) { | |
1918 | free(p); | |
1919 | continue; | |
1920 | } | |
1921 | ||
1922 | if (sscanf(de->d_name + q-8-16-1-16, "%16llx-%16llx.journal", &seqnum, &realtime) != 2) { | |
1923 | free(p); | |
1924 | continue; | |
1925 | } | |
1926 | ||
1927 | if (n_list >= n_allocated) { | |
1928 | struct vacuum_info *j; | |
1929 | ||
1930 | n_allocated = MAX(n_allocated * 2U, 8U); | |
1931 | j = realloc(list, n_allocated * sizeof(struct vacuum_info)); | |
1932 | if (!j) { | |
1933 | free(p); | |
1934 | r = -ENOMEM; | |
1935 | goto finish; | |
1936 | } | |
1937 | ||
1938 | list = j; | |
1939 | } | |
1940 | ||
1941 | list[n_list].filename = p; | |
1942 | list[n_list].usage = (uint64_t) st.st_blksize * (uint64_t) st.st_blocks; | |
1943 | list[n_list].seqnum = seqnum; | |
1944 | list[n_list].realtime = realtime; | |
1945 | list[n_list].seqnum_id = seqnum_id; | |
1946 | ||
1947 | sum += list[n_list].usage; | |
1948 | ||
1949 | n_list ++; | |
1950 | } | |
1951 | ||
1952 | qsort(list, n_list, sizeof(struct vacuum_info), vacuum_compare); | |
1953 | ||
1954 | for(i = 0; i < n_list; i++) { | |
1955 | struct statvfs ss; | |
1956 | ||
1957 | if (fstatvfs(dirfd(d), &ss) < 0) { | |
1958 | r = -errno; | |
1959 | goto finish; | |
1960 | } | |
1961 | ||
1962 | if (sum <= max_use && | |
1963 | (uint64_t) ss.f_bavail * (uint64_t) ss.f_bsize >= min_free) | |
1964 | break; | |
1965 | ||
1966 | if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) { | |
1967 | log_debug("Deleted archived journal %s/%s.", directory, list[i].filename); | |
1968 | sum -= list[i].usage; | |
1969 | } else if (errno != ENOENT) | |
1970 | log_warning("Failed to delete %s/%s: %m", directory, list[i].filename); | |
1971 | } | |
1972 | ||
1973 | finish: | |
1974 | for (i = 0; i < n_list; i++) | |
1975 | free(list[i].filename); | |
1976 | ||
1977 | free(list); | |
1978 | ||
de190aef LP |
1979 | if (d) |
1980 | closedir(d); | |
1981 | ||
0ac38b70 LP |
1982 | return r; |
1983 | } |