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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 | ||
babfc091 LP |
42 | /* This is the minimum journal file size */ |
43 | #define JOURNAL_FILE_SIZE_MIN (64ULL*1024ULL) | |
44 | ||
45 | /* These are the lower and upper bounds if we deduce the max_use value | |
46 | * from the file system size */ | |
47 | #define DEFAULT_MAX_USE_LOWER (1ULL*1024ULL*1024ULL) /* 1 MiB */ | |
48 | #define DEFAULT_MAX_USE_UPPER (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ | |
49 | ||
50 | /* This is the upper bound if we deduce max_size from max_use */ | |
51 | #define DEFAULT_MAX_SIZE_UPPER (16ULL*1024ULL*1024ULL) /* 16 MiB */ | |
52 | ||
53 | /* This is the upper bound if we deduce the keep_free value from the | |
54 | * file system size */ | |
55 | #define DEFAULT_KEEP_FREE_UPPER (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ | |
56 | ||
57 | /* This is the keep_free value when we can't determine the system | |
58 | * size */ | |
59 | #define DEFAULT_KEEP_FREE (1024ULL*1024ULL) /* 1 MB */ | |
60 | ||
cec736d2 LP |
61 | static const char signature[] = { 'L', 'P', 'K', 'S', 'H', 'H', 'R', 'H' }; |
62 | ||
63 | #define ALIGN64(x) (((x) + 7ULL) & ~7ULL) | |
64 | ||
65 | void journal_file_close(JournalFile *f) { | |
de190aef | 66 | int t; |
cec736d2 | 67 | |
de190aef | 68 | assert(f); |
cec736d2 | 69 | |
de190aef LP |
70 | if (f->header && f->writable) |
71 | f->header->state = STATE_OFFLINE; | |
cec736d2 | 72 | |
cec736d2 | 73 | |
de190aef LP |
74 | for (t = 0; t < _WINDOW_MAX; t++) |
75 | if (f->windows[t].ptr) | |
76 | munmap(f->windows[t].ptr, f->windows[t].size); | |
cec736d2 | 77 | |
0ac38b70 LP |
78 | if (f->fd >= 0) |
79 | close_nointr_nofail(f->fd); | |
80 | ||
cec736d2 | 81 | free(f->path); |
807e17f0 LP |
82 | |
83 | #ifdef HAVE_XZ | |
84 | free(f->compress_buffer); | |
85 | #endif | |
86 | ||
cec736d2 LP |
87 | free(f); |
88 | } | |
89 | ||
0ac38b70 | 90 | static int journal_file_init_header(JournalFile *f, JournalFile *template) { |
cec736d2 LP |
91 | Header h; |
92 | ssize_t k; | |
93 | int r; | |
94 | ||
95 | assert(f); | |
96 | ||
97 | zero(h); | |
98 | memcpy(h.signature, signature, 8); | |
99 | h.arena_offset = htole64(ALIGN64(sizeof(h))); | |
cec736d2 LP |
100 | |
101 | r = sd_id128_randomize(&h.file_id); | |
102 | if (r < 0) | |
103 | return r; | |
104 | ||
0ac38b70 LP |
105 | if (template) { |
106 | h.seqnum_id = template->header->seqnum_id; | |
107 | h.seqnum = template->header->seqnum; | |
108 | } else | |
109 | h.seqnum_id = h.file_id; | |
cec736d2 LP |
110 | |
111 | k = pwrite(f->fd, &h, sizeof(h), 0); | |
112 | if (k < 0) | |
113 | return -errno; | |
114 | ||
115 | if (k != sizeof(h)) | |
116 | return -EIO; | |
117 | ||
118 | return 0; | |
119 | } | |
120 | ||
121 | static int journal_file_refresh_header(JournalFile *f) { | |
122 | int r; | |
de190aef | 123 | sd_id128_t boot_id; |
cec736d2 LP |
124 | |
125 | assert(f); | |
126 | ||
127 | r = sd_id128_get_machine(&f->header->machine_id); | |
128 | if (r < 0) | |
129 | return r; | |
130 | ||
de190aef | 131 | r = sd_id128_get_boot(&boot_id); |
cec736d2 LP |
132 | if (r < 0) |
133 | return r; | |
134 | ||
de190aef LP |
135 | if (sd_id128_equal(boot_id, f->header->boot_id)) |
136 | f->tail_entry_monotonic_valid = true; | |
137 | ||
138 | f->header->boot_id = boot_id; | |
139 | ||
140 | f->header->state = STATE_ONLINE; | |
cec736d2 LP |
141 | return 0; |
142 | } | |
143 | ||
144 | static int journal_file_verify_header(JournalFile *f) { | |
145 | assert(f); | |
146 | ||
147 | if (memcmp(f->header, signature, 8)) | |
148 | return -EBADMSG; | |
149 | ||
807e17f0 LP |
150 | #ifdef HAVE_XZ |
151 | if ((le64toh(f->header->incompatible_flags) & ~HEADER_INCOMPATIBLE_COMPRESSED) != 0) | |
152 | return -EPROTONOSUPPORT; | |
153 | #else | |
cec736d2 LP |
154 | if (f->header->incompatible_flags != 0) |
155 | return -EPROTONOSUPPORT; | |
807e17f0 | 156 | #endif |
cec736d2 LP |
157 | |
158 | if ((uint64_t) f->last_stat.st_size < (le64toh(f->header->arena_offset) + le64toh(f->header->arena_size))) | |
159 | return -ENODATA; | |
160 | ||
161 | if (f->writable) { | |
162 | uint32_t state; | |
163 | sd_id128_t machine_id; | |
164 | int r; | |
165 | ||
166 | r = sd_id128_get_machine(&machine_id); | |
167 | if (r < 0) | |
168 | return r; | |
169 | ||
170 | if (!sd_id128_equal(machine_id, f->header->machine_id)) | |
171 | return -EHOSTDOWN; | |
172 | ||
de190aef | 173 | state = f->header->state; |
cec736d2 LP |
174 | |
175 | if (state == STATE_ONLINE) | |
176 | log_debug("Journal file %s is already online. Assuming unclean closing. Ignoring.", f->path); | |
177 | else if (state == STATE_ARCHIVED) | |
178 | return -ESHUTDOWN; | |
179 | else if (state != STATE_OFFLINE) | |
180 | log_debug("Journal file %s has unknown state %u. Ignoring.", f->path, state); | |
181 | } | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size) { | |
cec736d2 LP |
187 | uint64_t old_size, new_size; |
188 | ||
189 | assert(f); | |
190 | ||
cec736d2 | 191 | /* We assume that this file is not sparse, and we know that |
38ac38b2 | 192 | * for sure, since we always call posix_fallocate() |
cec736d2 LP |
193 | * ourselves */ |
194 | ||
195 | old_size = | |
196 | le64toh(f->header->arena_offset) + | |
197 | le64toh(f->header->arena_size); | |
198 | ||
bc85bfee LP |
199 | new_size = PAGE_ALIGN(offset + size); |
200 | if (new_size < le64toh(f->header->arena_offset)) | |
201 | new_size = le64toh(f->header->arena_offset); | |
202 | ||
203 | if (new_size <= old_size) | |
cec736d2 LP |
204 | return 0; |
205 | ||
bc85bfee LP |
206 | if (f->metrics.max_size > 0 && |
207 | new_size > f->metrics.max_size) | |
208 | return -E2BIG; | |
cec736d2 | 209 | |
bc85bfee LP |
210 | if (new_size > f->metrics.min_size && |
211 | f->metrics.keep_free > 0) { | |
cec736d2 LP |
212 | struct statvfs svfs; |
213 | ||
214 | if (fstatvfs(f->fd, &svfs) >= 0) { | |
215 | uint64_t available; | |
216 | ||
217 | available = svfs.f_bfree * svfs.f_bsize; | |
218 | ||
bc85bfee LP |
219 | if (available >= f->metrics.keep_free) |
220 | available -= f->metrics.keep_free; | |
cec736d2 LP |
221 | else |
222 | available = 0; | |
223 | ||
224 | if (new_size - old_size > available) | |
225 | return -E2BIG; | |
226 | } | |
227 | } | |
228 | ||
bc85bfee LP |
229 | /* Note that the glibc fallocate() fallback is very |
230 | inefficient, hence we try to minimize the allocation area | |
231 | as we can. */ | |
38ac38b2 | 232 | if (posix_fallocate(f->fd, old_size, new_size - old_size) < 0) |
cec736d2 LP |
233 | return -errno; |
234 | ||
235 | if (fstat(f->fd, &f->last_stat) < 0) | |
236 | return -errno; | |
237 | ||
bc85bfee | 238 | f->header->arena_size = new_size - htole64(f->header->arena_offset); |
cec736d2 LP |
239 | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static int journal_file_map( | |
244 | JournalFile *f, | |
245 | uint64_t offset, | |
246 | uint64_t size, | |
247 | void **_window, | |
248 | uint64_t *_woffset, | |
249 | uint64_t *_wsize, | |
250 | void **ret) { | |
251 | ||
252 | uint64_t woffset, wsize; | |
253 | void *window; | |
254 | ||
255 | assert(f); | |
256 | assert(size > 0); | |
257 | assert(ret); | |
258 | ||
259 | woffset = offset & ~((uint64_t) page_size() - 1ULL); | |
260 | wsize = size + (offset - woffset); | |
261 | wsize = PAGE_ALIGN(wsize); | |
262 | ||
2a59ea54 LP |
263 | /* Avoid SIGBUS on invalid accesses */ |
264 | if (woffset + wsize > (uint64_t) PAGE_ALIGN(f->last_stat.st_size)) | |
265 | return -EADDRNOTAVAIL; | |
266 | ||
cec736d2 LP |
267 | window = mmap(NULL, wsize, f->prot, MAP_SHARED, f->fd, woffset); |
268 | if (window == MAP_FAILED) | |
269 | return -errno; | |
270 | ||
271 | if (_window) | |
272 | *_window = window; | |
273 | ||
274 | if (_woffset) | |
275 | *_woffset = woffset; | |
276 | ||
277 | if (_wsize) | |
278 | *_wsize = wsize; | |
279 | ||
280 | *ret = (uint8_t*) window + (offset - woffset); | |
281 | ||
282 | return 0; | |
283 | } | |
284 | ||
de190aef | 285 | static int journal_file_move_to(JournalFile *f, int wt, uint64_t offset, uint64_t size, void **ret) { |
6c8a39b8 | 286 | void *p = NULL; |
cec736d2 LP |
287 | uint64_t delta; |
288 | int r; | |
de190aef | 289 | Window *w; |
cec736d2 LP |
290 | |
291 | assert(f); | |
292 | assert(ret); | |
de190aef LP |
293 | assert(wt >= 0); |
294 | assert(wt < _WINDOW_MAX); | |
cec736d2 | 295 | |
de190aef | 296 | w = f->windows + wt; |
cec736d2 | 297 | |
de190aef LP |
298 | if (_likely_(w->ptr && |
299 | w->offset <= offset && | |
300 | w->offset + w->size >= offset + size)) { | |
301 | ||
302 | *ret = (uint8_t*) w->ptr + (offset - w->offset); | |
cec736d2 LP |
303 | return 0; |
304 | } | |
305 | ||
de190aef LP |
306 | if (w->ptr) { |
307 | if (munmap(w->ptr, w->size) < 0) | |
cec736d2 LP |
308 | return -errno; |
309 | ||
de190aef LP |
310 | w->ptr = NULL; |
311 | w->size = w->offset = 0; | |
cec736d2 LP |
312 | } |
313 | ||
314 | if (size < DEFAULT_WINDOW_SIZE) { | |
315 | /* If the default window size is larger then what was | |
316 | * asked for extend the mapping a bit in the hope to | |
317 | * minimize needed remappings later on. We add half | |
318 | * the window space before and half behind the | |
319 | * requested mapping */ | |
320 | ||
321 | delta = PAGE_ALIGN((DEFAULT_WINDOW_SIZE - size) / 2); | |
322 | ||
323 | if (offset < delta) | |
324 | delta = offset; | |
325 | ||
326 | offset -= delta; | |
327 | size += (DEFAULT_WINDOW_SIZE - delta); | |
328 | } else | |
329 | delta = 0; | |
330 | ||
2a59ea54 LP |
331 | if (offset > (uint64_t) f->last_stat.st_size) |
332 | return -EADDRNOTAVAIL; | |
333 | ||
334 | if (offset + size > (uint64_t) f->last_stat.st_size) | |
335 | size = PAGE_ALIGN((uint64_t) f->last_stat.st_size - offset); | |
336 | ||
337 | if (size <= 0) | |
338 | return -EADDRNOTAVAIL; | |
339 | ||
cec736d2 LP |
340 | r = journal_file_map(f, |
341 | offset, size, | |
de190aef LP |
342 | &w->ptr, &w->offset, &w->size, |
343 | &p); | |
cec736d2 LP |
344 | |
345 | if (r < 0) | |
346 | return r; | |
347 | ||
348 | *ret = (uint8_t*) p + delta; | |
349 | return 0; | |
350 | } | |
351 | ||
352 | static bool verify_hash(Object *o) { | |
de190aef | 353 | uint64_t h1, h2; |
cec736d2 LP |
354 | |
355 | assert(o); | |
356 | ||
807e17f0 | 357 | if (o->object.type == OBJECT_DATA && !(o->object.flags & OBJECT_COMPRESSED)) { |
cec736d2 | 358 | h1 = le64toh(o->data.hash); |
de190aef LP |
359 | h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload)); |
360 | } else if (o->object.type == OBJECT_FIELD) { | |
361 | h1 = le64toh(o->field.hash); | |
362 | h2 = hash64(o->field.payload, le64toh(o->object.size) - offsetof(Object, field.payload)); | |
363 | } else | |
364 | return true; | |
cec736d2 | 365 | |
de190aef | 366 | return h1 == h2; |
cec736d2 LP |
367 | } |
368 | ||
de190aef | 369 | int journal_file_move_to_object(JournalFile *f, int type, uint64_t offset, Object **ret) { |
cec736d2 LP |
370 | int r; |
371 | void *t; | |
372 | Object *o; | |
373 | uint64_t s; | |
374 | ||
375 | assert(f); | |
376 | assert(ret); | |
de190aef | 377 | assert(type < _OBJECT_TYPE_MAX); |
cec736d2 | 378 | |
de190aef | 379 | r = journal_file_move_to(f, type >= 0 ? type : WINDOW_UNKNOWN, offset, sizeof(ObjectHeader), &t); |
cec736d2 LP |
380 | if (r < 0) |
381 | return r; | |
382 | ||
383 | o = (Object*) t; | |
384 | s = le64toh(o->object.size); | |
385 | ||
386 | if (s < sizeof(ObjectHeader)) | |
387 | return -EBADMSG; | |
388 | ||
de190aef | 389 | if (type >= 0 && o->object.type != type) |
cec736d2 LP |
390 | return -EBADMSG; |
391 | ||
392 | if (s > sizeof(ObjectHeader)) { | |
de190aef | 393 | r = journal_file_move_to(f, o->object.type, offset, s, &t); |
cec736d2 LP |
394 | if (r < 0) |
395 | return r; | |
396 | ||
397 | o = (Object*) t; | |
398 | } | |
399 | ||
400 | if (!verify_hash(o)) | |
401 | return -EBADMSG; | |
402 | ||
403 | *ret = o; | |
404 | return 0; | |
405 | } | |
406 | ||
c2373f84 | 407 | static uint64_t journal_file_seqnum(JournalFile *f, uint64_t *seqnum) { |
cec736d2 LP |
408 | uint64_t r; |
409 | ||
410 | assert(f); | |
411 | ||
412 | r = le64toh(f->header->seqnum) + 1; | |
c2373f84 LP |
413 | |
414 | if (seqnum) { | |
de190aef | 415 | /* If an external seqnum counter was passed, we update |
c2373f84 LP |
416 | * both the local and the external one, and set it to |
417 | * the maximum of both */ | |
418 | ||
419 | if (*seqnum + 1 > r) | |
420 | r = *seqnum + 1; | |
421 | ||
422 | *seqnum = r; | |
423 | } | |
424 | ||
cec736d2 LP |
425 | f->header->seqnum = htole64(r); |
426 | ||
de190aef LP |
427 | if (f->header->first_seqnum == 0) |
428 | f->header->first_seqnum = htole64(r); | |
429 | ||
cec736d2 LP |
430 | return r; |
431 | } | |
432 | ||
de190aef | 433 | static int journal_file_append_object(JournalFile *f, int type, uint64_t size, Object **ret, uint64_t *offset) { |
cec736d2 LP |
434 | int r; |
435 | uint64_t p; | |
436 | Object *tail, *o; | |
437 | void *t; | |
438 | ||
439 | assert(f); | |
440 | assert(size >= sizeof(ObjectHeader)); | |
441 | assert(offset); | |
442 | assert(ret); | |
443 | ||
444 | p = le64toh(f->header->tail_object_offset); | |
cec736d2 LP |
445 | if (p == 0) |
446 | p = le64toh(f->header->arena_offset); | |
447 | else { | |
de190aef | 448 | r = journal_file_move_to_object(f, -1, p, &tail); |
cec736d2 LP |
449 | if (r < 0) |
450 | return r; | |
451 | ||
452 | p += ALIGN64(le64toh(tail->object.size)); | |
453 | } | |
454 | ||
455 | r = journal_file_allocate(f, p, size); | |
456 | if (r < 0) | |
457 | return r; | |
458 | ||
de190aef | 459 | r = journal_file_move_to(f, type, p, size, &t); |
cec736d2 LP |
460 | if (r < 0) |
461 | return r; | |
462 | ||
463 | o = (Object*) t; | |
464 | ||
465 | zero(o->object); | |
de190aef | 466 | o->object.type = type; |
cec736d2 LP |
467 | o->object.size = htole64(size); |
468 | ||
469 | f->header->tail_object_offset = htole64(p); | |
cec736d2 LP |
470 | f->header->n_objects = htole64(le64toh(f->header->n_objects) + 1); |
471 | ||
472 | *ret = o; | |
473 | *offset = p; | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
de190aef | 478 | static int journal_file_setup_data_hash_table(JournalFile *f) { |
cec736d2 LP |
479 | uint64_t s, p; |
480 | Object *o; | |
481 | int r; | |
482 | ||
483 | assert(f); | |
484 | ||
de190aef LP |
485 | s = DEFAULT_DATA_HASH_TABLE_SIZE; |
486 | r = journal_file_append_object(f, | |
487 | OBJECT_DATA_HASH_TABLE, | |
488 | offsetof(Object, hash_table.items) + s, | |
489 | &o, &p); | |
cec736d2 LP |
490 | if (r < 0) |
491 | return r; | |
492 | ||
de190aef | 493 | memset(o->hash_table.items, 0, s); |
cec736d2 | 494 | |
de190aef LP |
495 | f->header->data_hash_table_offset = htole64(p + offsetof(Object, hash_table.items)); |
496 | f->header->data_hash_table_size = htole64(s); | |
cec736d2 LP |
497 | |
498 | return 0; | |
499 | } | |
500 | ||
de190aef | 501 | static int journal_file_setup_field_hash_table(JournalFile *f) { |
cec736d2 LP |
502 | uint64_t s, p; |
503 | Object *o; | |
504 | int r; | |
505 | ||
506 | assert(f); | |
507 | ||
de190aef LP |
508 | s = DEFAULT_FIELD_HASH_TABLE_SIZE; |
509 | r = journal_file_append_object(f, | |
510 | OBJECT_FIELD_HASH_TABLE, | |
511 | offsetof(Object, hash_table.items) + s, | |
512 | &o, &p); | |
cec736d2 LP |
513 | if (r < 0) |
514 | return r; | |
515 | ||
de190aef | 516 | memset(o->hash_table.items, 0, s); |
cec736d2 | 517 | |
de190aef LP |
518 | f->header->field_hash_table_offset = htole64(p + offsetof(Object, hash_table.items)); |
519 | f->header->field_hash_table_size = htole64(s); | |
cec736d2 LP |
520 | |
521 | return 0; | |
522 | } | |
523 | ||
de190aef | 524 | static int journal_file_map_data_hash_table(JournalFile *f) { |
cec736d2 LP |
525 | uint64_t s, p; |
526 | void *t; | |
527 | int r; | |
528 | ||
529 | assert(f); | |
530 | ||
de190aef LP |
531 | p = le64toh(f->header->data_hash_table_offset); |
532 | s = le64toh(f->header->data_hash_table_size); | |
cec736d2 | 533 | |
de190aef LP |
534 | r = journal_file_move_to(f, |
535 | WINDOW_DATA_HASH_TABLE, | |
536 | p, s, | |
537 | &t); | |
cec736d2 LP |
538 | if (r < 0) |
539 | return r; | |
540 | ||
de190aef | 541 | f->data_hash_table = t; |
cec736d2 LP |
542 | return 0; |
543 | } | |
544 | ||
de190aef | 545 | static int journal_file_map_field_hash_table(JournalFile *f) { |
cec736d2 LP |
546 | uint64_t s, p; |
547 | void *t; | |
548 | int r; | |
549 | ||
550 | assert(f); | |
551 | ||
de190aef LP |
552 | p = le64toh(f->header->field_hash_table_offset); |
553 | s = le64toh(f->header->field_hash_table_size); | |
cec736d2 | 554 | |
de190aef LP |
555 | r = journal_file_move_to(f, |
556 | WINDOW_FIELD_HASH_TABLE, | |
557 | p, s, | |
558 | &t); | |
cec736d2 LP |
559 | if (r < 0) |
560 | return r; | |
561 | ||
de190aef | 562 | f->field_hash_table = t; |
cec736d2 LP |
563 | return 0; |
564 | } | |
565 | ||
de190aef LP |
566 | static int journal_file_link_data(JournalFile *f, Object *o, uint64_t offset, uint64_t hash) { |
567 | uint64_t p, h; | |
cec736d2 LP |
568 | int r; |
569 | ||
570 | assert(f); | |
571 | assert(o); | |
572 | assert(offset > 0); | |
de190aef | 573 | assert(o->object.type == OBJECT_DATA); |
cec736d2 | 574 | |
de190aef LP |
575 | o->data.next_hash_offset = o->data.next_field_offset = 0; |
576 | o->data.entry_offset = o->data.entry_array_offset = 0; | |
577 | o->data.n_entries = 0; | |
cec736d2 | 578 | |
de190aef LP |
579 | h = hash % (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)); |
580 | p = le64toh(f->data_hash_table[h].head_hash_offset); | |
cec736d2 LP |
581 | if (p == 0) { |
582 | /* Only entry in the hash table is easy */ | |
de190aef | 583 | f->data_hash_table[h].head_hash_offset = htole64(offset); |
cec736d2 | 584 | } else { |
cec736d2 LP |
585 | /* Temporarily move back to the previous data object, |
586 | * to patch in pointer */ | |
587 | ||
de190aef | 588 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); |
cec736d2 LP |
589 | if (r < 0) |
590 | return r; | |
591 | ||
de190aef | 592 | o->data.next_hash_offset = htole64(offset); |
cec736d2 | 593 | |
de190aef | 594 | r = journal_file_move_to_object(f, OBJECT_DATA, offset, &o); |
cec736d2 LP |
595 | if (r < 0) |
596 | return r; | |
597 | } | |
598 | ||
de190aef | 599 | f->data_hash_table[h].tail_hash_offset = htole64(offset); |
cec736d2 LP |
600 | |
601 | return 0; | |
602 | } | |
603 | ||
de190aef LP |
604 | int journal_file_find_data_object_with_hash( |
605 | JournalFile *f, | |
606 | const void *data, uint64_t size, uint64_t hash, | |
607 | Object **ret, uint64_t *offset) { | |
608 | uint64_t p, osize, h; | |
cec736d2 LP |
609 | int r; |
610 | ||
611 | assert(f); | |
612 | assert(data || size == 0); | |
613 | ||
614 | osize = offsetof(Object, data.payload) + size; | |
615 | ||
bc85bfee LP |
616 | if (f->header->data_hash_table_size == 0) |
617 | return -EBADMSG; | |
618 | ||
de190aef LP |
619 | h = hash % (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)); |
620 | p = le64toh(f->data_hash_table[h].head_hash_offset); | |
cec736d2 | 621 | |
de190aef LP |
622 | while (p > 0) { |
623 | Object *o; | |
cec736d2 | 624 | |
de190aef | 625 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); |
cec736d2 LP |
626 | if (r < 0) |
627 | return r; | |
628 | ||
807e17f0 | 629 | if (le64toh(o->data.hash) != hash) |
85a131e8 | 630 | goto next; |
807e17f0 LP |
631 | |
632 | if (o->object.flags & OBJECT_COMPRESSED) { | |
633 | #ifdef HAVE_XZ | |
634 | uint64_t l, rsize; | |
cec736d2 | 635 | |
807e17f0 LP |
636 | l = le64toh(o->object.size); |
637 | if (l <= offsetof(Object, data.payload)) | |
cec736d2 LP |
638 | return -EBADMSG; |
639 | ||
807e17f0 LP |
640 | l -= offsetof(Object, data.payload); |
641 | ||
642 | if (!uncompress_blob(o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize)) | |
643 | return -EBADMSG; | |
644 | ||
645 | if (rsize == size && | |
646 | memcmp(f->compress_buffer, data, size) == 0) { | |
647 | ||
648 | if (ret) | |
649 | *ret = o; | |
650 | ||
651 | if (offset) | |
652 | *offset = p; | |
653 | ||
654 | return 1; | |
655 | } | |
656 | #else | |
657 | return -EPROTONOSUPPORT; | |
658 | #endif | |
659 | ||
660 | } else if (le64toh(o->object.size) == osize && | |
661 | memcmp(o->data.payload, data, size) == 0) { | |
662 | ||
cec736d2 LP |
663 | if (ret) |
664 | *ret = o; | |
665 | ||
666 | if (offset) | |
667 | *offset = p; | |
668 | ||
de190aef | 669 | return 1; |
cec736d2 LP |
670 | } |
671 | ||
85a131e8 | 672 | next: |
cec736d2 LP |
673 | p = le64toh(o->data.next_hash_offset); |
674 | } | |
675 | ||
de190aef LP |
676 | return 0; |
677 | } | |
678 | ||
679 | int journal_file_find_data_object( | |
680 | JournalFile *f, | |
681 | const void *data, uint64_t size, | |
682 | Object **ret, uint64_t *offset) { | |
683 | ||
684 | uint64_t hash; | |
685 | ||
686 | assert(f); | |
687 | assert(data || size == 0); | |
688 | ||
689 | hash = hash64(data, size); | |
690 | ||
691 | return journal_file_find_data_object_with_hash(f, | |
692 | data, size, hash, | |
693 | ret, offset); | |
694 | } | |
695 | ||
696 | static int journal_file_append_data(JournalFile *f, const void *data, uint64_t size, Object **ret, uint64_t *offset) { | |
697 | uint64_t hash, p; | |
698 | uint64_t osize; | |
699 | Object *o; | |
700 | int r; | |
807e17f0 | 701 | bool compressed = false; |
de190aef LP |
702 | |
703 | assert(f); | |
704 | assert(data || size == 0); | |
705 | ||
706 | hash = hash64(data, size); | |
707 | ||
708 | r = journal_file_find_data_object_with_hash(f, data, size, hash, &o, &p); | |
709 | if (r < 0) | |
710 | return r; | |
711 | else if (r > 0) { | |
712 | ||
713 | if (ret) | |
714 | *ret = o; | |
715 | ||
716 | if (offset) | |
717 | *offset = p; | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | osize = offsetof(Object, data.payload) + size; | |
723 | r = journal_file_append_object(f, OBJECT_DATA, osize, &o, &p); | |
cec736d2 LP |
724 | if (r < 0) |
725 | return r; | |
726 | ||
cec736d2 | 727 | o->data.hash = htole64(hash); |
807e17f0 LP |
728 | |
729 | #ifdef HAVE_XZ | |
730 | if (f->compress && | |
731 | size >= COMPRESSION_SIZE_THRESHOLD) { | |
732 | uint64_t rsize; | |
733 | ||
734 | compressed = compress_blob(data, size, o->data.payload, &rsize); | |
735 | ||
736 | if (compressed) { | |
737 | o->object.size = htole64(offsetof(Object, data.payload) + rsize); | |
738 | o->object.flags |= OBJECT_COMPRESSED; | |
739 | ||
740 | f->header->incompatible_flags = htole32(le32toh(f->header->incompatible_flags) | HEADER_INCOMPATIBLE_COMPRESSED); | |
741 | ||
742 | log_debug("Compressed data object %lu -> %lu", (unsigned long) size, (unsigned long) rsize); | |
743 | } | |
744 | } | |
745 | #endif | |
746 | ||
747 | if (!compressed) | |
748 | memcpy(o->data.payload, data, size); | |
cec736d2 | 749 | |
de190aef | 750 | r = journal_file_link_data(f, o, p, hash); |
cec736d2 LP |
751 | if (r < 0) |
752 | return r; | |
753 | ||
754 | if (ret) | |
755 | *ret = o; | |
756 | ||
757 | if (offset) | |
de190aef | 758 | *offset = p; |
cec736d2 LP |
759 | |
760 | return 0; | |
761 | } | |
762 | ||
763 | uint64_t journal_file_entry_n_items(Object *o) { | |
764 | assert(o); | |
765 | assert(o->object.type == htole64(OBJECT_ENTRY)); | |
766 | ||
767 | return (le64toh(o->object.size) - offsetof(Object, entry.items)) / sizeof(EntryItem); | |
768 | } | |
769 | ||
de190aef LP |
770 | static uint64_t journal_file_entry_array_n_items(Object *o) { |
771 | assert(o); | |
772 | assert(o->object.type == htole64(OBJECT_ENTRY_ARRAY)); | |
773 | ||
774 | return (le64toh(o->object.size) - offsetof(Object, entry_array.items)) / sizeof(uint64_t); | |
775 | } | |
776 | ||
777 | static int link_entry_into_array(JournalFile *f, | |
778 | uint64_t *first, | |
779 | uint64_t *idx, | |
780 | uint64_t p) { | |
cec736d2 | 781 | int r; |
de190aef LP |
782 | uint64_t n = 0, ap = 0, q, i, a, hidx; |
783 | Object *o; | |
784 | ||
cec736d2 | 785 | assert(f); |
de190aef LP |
786 | assert(first); |
787 | assert(idx); | |
788 | assert(p > 0); | |
cec736d2 | 789 | |
de190aef LP |
790 | a = le64toh(*first); |
791 | i = hidx = le64toh(*idx); | |
792 | while (a > 0) { | |
793 | ||
794 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o); | |
795 | if (r < 0) | |
796 | return r; | |
cec736d2 | 797 | |
de190aef LP |
798 | n = journal_file_entry_array_n_items(o); |
799 | if (i < n) { | |
800 | o->entry_array.items[i] = htole64(p); | |
801 | *idx = htole64(hidx + 1); | |
802 | return 0; | |
803 | } | |
cec736d2 | 804 | |
de190aef LP |
805 | i -= n; |
806 | ap = a; | |
807 | a = le64toh(o->entry_array.next_entry_array_offset); | |
808 | } | |
809 | ||
810 | if (hidx > n) | |
811 | n = (hidx+1) * 2; | |
812 | else | |
813 | n = n * 2; | |
814 | ||
815 | if (n < 4) | |
816 | n = 4; | |
817 | ||
818 | r = journal_file_append_object(f, OBJECT_ENTRY_ARRAY, | |
819 | offsetof(Object, entry_array.items) + n * sizeof(uint64_t), | |
820 | &o, &q); | |
cec736d2 LP |
821 | if (r < 0) |
822 | return r; | |
823 | ||
de190aef | 824 | o->entry_array.items[i] = htole64(p); |
cec736d2 | 825 | |
de190aef LP |
826 | if (ap == 0) |
827 | *first = q; | |
cec736d2 | 828 | else { |
de190aef | 829 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, ap, &o); |
cec736d2 LP |
830 | if (r < 0) |
831 | return r; | |
832 | ||
de190aef LP |
833 | o->entry_array.next_entry_array_offset = htole64(q); |
834 | } | |
cec736d2 | 835 | |
de190aef LP |
836 | *idx = htole64(hidx + 1); |
837 | ||
838 | return 0; | |
839 | } | |
cec736d2 | 840 | |
de190aef LP |
841 | static int link_entry_into_array_plus_one(JournalFile *f, |
842 | uint64_t *extra, | |
843 | uint64_t *first, | |
844 | uint64_t *idx, | |
845 | uint64_t p) { | |
846 | ||
847 | int r; | |
848 | ||
849 | assert(f); | |
850 | assert(extra); | |
851 | assert(first); | |
852 | assert(idx); | |
853 | assert(p > 0); | |
854 | ||
855 | if (*idx == 0) | |
856 | *extra = htole64(p); | |
857 | else { | |
858 | uint64_t i; | |
859 | ||
860 | i = le64toh(*idx) - 1; | |
861 | r = link_entry_into_array(f, first, &i, p); | |
862 | if (r < 0) | |
863 | return r; | |
cec736d2 LP |
864 | } |
865 | ||
de190aef LP |
866 | *idx = htole64(le64toh(*idx) + 1); |
867 | return 0; | |
868 | } | |
869 | ||
870 | static int journal_file_link_entry_item(JournalFile *f, Object *o, uint64_t offset, uint64_t i) { | |
871 | uint64_t p; | |
872 | int r; | |
873 | assert(f); | |
874 | assert(o); | |
875 | assert(offset > 0); | |
876 | ||
877 | p = le64toh(o->entry.items[i].object_offset); | |
878 | if (p == 0) | |
879 | return -EINVAL; | |
880 | ||
881 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
cec736d2 LP |
882 | if (r < 0) |
883 | return r; | |
884 | ||
de190aef LP |
885 | return link_entry_into_array_plus_one(f, |
886 | &o->data.entry_offset, | |
887 | &o->data.entry_array_offset, | |
888 | &o->data.n_entries, | |
889 | offset); | |
cec736d2 LP |
890 | } |
891 | ||
892 | static int journal_file_link_entry(JournalFile *f, Object *o, uint64_t offset) { | |
de190aef | 893 | uint64_t n, i; |
cec736d2 LP |
894 | int r; |
895 | ||
896 | assert(f); | |
897 | assert(o); | |
898 | assert(offset > 0); | |
de190aef | 899 | assert(o->object.type == OBJECT_ENTRY); |
cec736d2 LP |
900 | |
901 | /* Link up the entry itself */ | |
de190aef LP |
902 | r = link_entry_into_array(f, |
903 | &f->header->entry_array_offset, | |
904 | &f->header->n_entries, | |
905 | offset); | |
906 | if (r < 0) | |
907 | return r; | |
cec736d2 | 908 | |
bc85bfee | 909 | log_error("=> %s seqnr=%lu n_entries=%lu", f->path, (unsigned long) o->entry.seqnum, (unsigned long) f->header->n_entries); |
cec736d2 | 910 | |
de190aef | 911 | if (f->header->head_entry_realtime == 0) |
0ac38b70 | 912 | f->header->head_entry_realtime = o->entry.realtime; |
cec736d2 | 913 | |
0ac38b70 | 914 | f->header->tail_entry_realtime = o->entry.realtime; |
de190aef LP |
915 | f->header->tail_entry_monotonic = o->entry.monotonic; |
916 | ||
917 | f->tail_entry_monotonic_valid = true; | |
cec736d2 LP |
918 | |
919 | /* Link up the items */ | |
920 | n = journal_file_entry_n_items(o); | |
921 | for (i = 0; i < n; i++) { | |
922 | r = journal_file_link_entry_item(f, o, offset, i); | |
923 | if (r < 0) | |
924 | return r; | |
925 | } | |
926 | ||
cec736d2 LP |
927 | return 0; |
928 | } | |
929 | ||
930 | static int journal_file_append_entry_internal( | |
931 | JournalFile *f, | |
932 | const dual_timestamp *ts, | |
933 | uint64_t xor_hash, | |
934 | const EntryItem items[], unsigned n_items, | |
de190aef | 935 | uint64_t *seqnum, |
cec736d2 LP |
936 | Object **ret, uint64_t *offset) { |
937 | uint64_t np; | |
938 | uint64_t osize; | |
939 | Object *o; | |
940 | int r; | |
941 | ||
942 | assert(f); | |
943 | assert(items || n_items == 0); | |
de190aef | 944 | assert(ts); |
cec736d2 LP |
945 | |
946 | osize = offsetof(Object, entry.items) + (n_items * sizeof(EntryItem)); | |
947 | ||
de190aef | 948 | r = journal_file_append_object(f, OBJECT_ENTRY, osize, &o, &np); |
cec736d2 LP |
949 | if (r < 0) |
950 | return r; | |
951 | ||
de190aef | 952 | o->entry.seqnum = htole64(journal_file_seqnum(f, seqnum)); |
cec736d2 | 953 | memcpy(o->entry.items, items, n_items * sizeof(EntryItem)); |
de190aef LP |
954 | o->entry.realtime = htole64(ts->realtime); |
955 | o->entry.monotonic = htole64(ts->monotonic); | |
cec736d2 LP |
956 | o->entry.xor_hash = htole64(xor_hash); |
957 | o->entry.boot_id = f->header->boot_id; | |
958 | ||
959 | r = journal_file_link_entry(f, o, np); | |
960 | if (r < 0) | |
961 | return r; | |
962 | ||
963 | if (ret) | |
964 | *ret = o; | |
965 | ||
966 | if (offset) | |
967 | *offset = np; | |
968 | ||
969 | return 0; | |
970 | } | |
971 | ||
cf244689 | 972 | void journal_file_post_change(JournalFile *f) { |
50f20cfd LP |
973 | assert(f); |
974 | ||
975 | /* inotify() does not receive IN_MODIFY events from file | |
976 | * accesses done via mmap(). After each access we hence | |
977 | * trigger IN_MODIFY by truncating the journal file to its | |
978 | * current size which triggers IN_MODIFY. */ | |
979 | ||
bc85bfee LP |
980 | __sync_synchronize(); |
981 | ||
50f20cfd LP |
982 | if (ftruncate(f->fd, f->last_stat.st_size) < 0) |
983 | log_error("Failed to to truncate file to its own size: %m"); | |
984 | } | |
985 | ||
de190aef | 986 | 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 |
987 | unsigned i; |
988 | EntryItem *items; | |
989 | int r; | |
990 | uint64_t xor_hash = 0; | |
de190aef | 991 | struct dual_timestamp _ts; |
cec736d2 LP |
992 | |
993 | assert(f); | |
994 | assert(iovec || n_iovec == 0); | |
995 | ||
de190aef LP |
996 | if (!f->writable) |
997 | return -EPERM; | |
998 | ||
999 | if (!ts) { | |
1000 | dual_timestamp_get(&_ts); | |
1001 | ts = &_ts; | |
1002 | } | |
1003 | ||
1004 | if (f->tail_entry_monotonic_valid && | |
1005 | ts->monotonic < le64toh(f->header->tail_entry_monotonic)) | |
1006 | return -EINVAL; | |
1007 | ||
1008 | if (ts->realtime < le64toh(f->header->tail_entry_realtime)) | |
1009 | return -EINVAL; | |
1010 | ||
cf244689 | 1011 | items = alloca(sizeof(EntryItem) * n_iovec); |
cec736d2 LP |
1012 | |
1013 | for (i = 0; i < n_iovec; i++) { | |
1014 | uint64_t p; | |
1015 | Object *o; | |
1016 | ||
1017 | r = journal_file_append_data(f, iovec[i].iov_base, iovec[i].iov_len, &o, &p); | |
1018 | if (r < 0) | |
cf244689 | 1019 | return r; |
cec736d2 LP |
1020 | |
1021 | xor_hash ^= le64toh(o->data.hash); | |
1022 | items[i].object_offset = htole64(p); | |
de7b95cd | 1023 | items[i].hash = o->data.hash; |
cec736d2 LP |
1024 | } |
1025 | ||
de190aef | 1026 | r = journal_file_append_entry_internal(f, ts, xor_hash, items, n_iovec, seqnum, ret, offset); |
cec736d2 | 1027 | |
50f20cfd LP |
1028 | journal_file_post_change(f); |
1029 | ||
cec736d2 LP |
1030 | return r; |
1031 | } | |
1032 | ||
de190aef LP |
1033 | static int generic_array_get(JournalFile *f, |
1034 | uint64_t first, | |
1035 | uint64_t i, | |
1036 | Object **ret, uint64_t *offset) { | |
1037 | ||
cec736d2 | 1038 | Object *o; |
6c8a39b8 | 1039 | uint64_t p = 0, a; |
cec736d2 LP |
1040 | int r; |
1041 | ||
1042 | assert(f); | |
1043 | ||
de190aef LP |
1044 | a = first; |
1045 | while (a > 0) { | |
1046 | uint64_t n; | |
cec736d2 | 1047 | |
de190aef LP |
1048 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o); |
1049 | if (r < 0) | |
1050 | return r; | |
cec736d2 | 1051 | |
de190aef LP |
1052 | n = journal_file_entry_array_n_items(o); |
1053 | if (i < n) { | |
1054 | p = le64toh(o->entry_array.items[i]); | |
1055 | break; | |
cec736d2 LP |
1056 | } |
1057 | ||
de190aef LP |
1058 | i -= n; |
1059 | a = le64toh(o->entry_array.next_entry_array_offset); | |
1060 | } | |
1061 | ||
1062 | if (a <= 0 || p <= 0) | |
1063 | return 0; | |
1064 | ||
1065 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1066 | if (r < 0) | |
1067 | return r; | |
1068 | ||
1069 | if (ret) | |
1070 | *ret = o; | |
1071 | ||
1072 | if (offset) | |
1073 | *offset = p; | |
1074 | ||
1075 | return 1; | |
1076 | } | |
1077 | ||
1078 | static int generic_array_get_plus_one(JournalFile *f, | |
1079 | uint64_t extra, | |
1080 | uint64_t first, | |
1081 | uint64_t i, | |
1082 | Object **ret, uint64_t *offset) { | |
1083 | ||
1084 | Object *o; | |
1085 | ||
1086 | assert(f); | |
1087 | ||
1088 | if (i == 0) { | |
1089 | int r; | |
1090 | ||
1091 | r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o); | |
cec736d2 LP |
1092 | if (r < 0) |
1093 | return r; | |
1094 | ||
de190aef LP |
1095 | if (ret) |
1096 | *ret = o; | |
cec736d2 | 1097 | |
de190aef LP |
1098 | if (offset) |
1099 | *offset = extra; | |
cec736d2 | 1100 | |
de190aef | 1101 | return 1; |
cec736d2 LP |
1102 | } |
1103 | ||
de190aef LP |
1104 | return generic_array_get(f, first, i-1, ret, offset); |
1105 | } | |
cec736d2 | 1106 | |
de190aef LP |
1107 | enum { |
1108 | TEST_FOUND, | |
1109 | TEST_LEFT, | |
1110 | TEST_RIGHT | |
1111 | }; | |
cec736d2 | 1112 | |
de190aef LP |
1113 | static int generic_array_bisect(JournalFile *f, |
1114 | uint64_t first, | |
1115 | uint64_t n, | |
1116 | uint64_t needle, | |
1117 | int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle), | |
1118 | direction_t direction, | |
1119 | Object **ret, | |
1120 | uint64_t *offset, | |
1121 | uint64_t *idx) { | |
1122 | ||
1123 | uint64_t a, p, t = 0, i = 0, last_p = 0; | |
1124 | bool subtract_one = false; | |
1125 | Object *o, *array = NULL; | |
1126 | int r; | |
cec736d2 | 1127 | |
de190aef LP |
1128 | assert(f); |
1129 | assert(test_object); | |
cec736d2 | 1130 | |
de190aef LP |
1131 | a = first; |
1132 | while (a > 0) { | |
1133 | uint64_t left, right, k, lp; | |
1134 | ||
1135 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &array); | |
cec736d2 LP |
1136 | if (r < 0) |
1137 | return r; | |
1138 | ||
de190aef LP |
1139 | k = journal_file_entry_array_n_items(array); |
1140 | right = MIN(k, n); | |
1141 | if (right <= 0) | |
1142 | return 0; | |
cec736d2 | 1143 | |
de190aef LP |
1144 | i = right - 1; |
1145 | lp = p = le64toh(array->entry_array.items[i]); | |
1146 | if (p <= 0) | |
1147 | return -EBADMSG; | |
cec736d2 | 1148 | |
de190aef LP |
1149 | r = test_object(f, p, needle); |
1150 | if (r < 0) | |
1151 | return r; | |
cec736d2 | 1152 | |
de190aef LP |
1153 | if (r == TEST_FOUND) |
1154 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1155 | ||
1156 | if (r == TEST_RIGHT) { | |
1157 | left = 0; | |
1158 | right -= 1; | |
1159 | for (;;) { | |
1160 | if (left == right) { | |
1161 | if (direction == DIRECTION_UP) | |
1162 | subtract_one = true; | |
1163 | ||
1164 | i = left; | |
1165 | goto found; | |
1166 | } | |
1167 | ||
1168 | assert(left < right); | |
1169 | ||
1170 | i = (left + right) / 2; | |
1171 | p = le64toh(array->entry_array.items[i]); | |
1172 | if (p <= 0) | |
1173 | return -EBADMSG; | |
1174 | ||
1175 | r = test_object(f, p, needle); | |
1176 | if (r < 0) | |
1177 | return r; | |
cec736d2 | 1178 | |
de190aef LP |
1179 | if (r == TEST_FOUND) |
1180 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1181 | ||
1182 | if (r == TEST_RIGHT) | |
1183 | right = i; | |
1184 | else | |
1185 | left = i + 1; | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | if (k > n) | |
cec736d2 LP |
1190 | return 0; |
1191 | ||
de190aef LP |
1192 | last_p = lp; |
1193 | ||
1194 | n -= k; | |
1195 | t += k; | |
1196 | a = le64toh(array->entry_array.next_entry_array_offset); | |
cec736d2 LP |
1197 | } |
1198 | ||
1199 | return 0; | |
de190aef LP |
1200 | |
1201 | found: | |
1202 | if (subtract_one && t == 0 && i == 0) | |
1203 | return 0; | |
1204 | ||
1205 | if (subtract_one && i == 0) | |
1206 | p = last_p; | |
1207 | else if (subtract_one) | |
1208 | p = le64toh(array->entry_array.items[i-1]); | |
1209 | else | |
1210 | p = le64toh(array->entry_array.items[i]); | |
1211 | ||
1212 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1213 | if (r < 0) | |
1214 | return r; | |
1215 | ||
1216 | if (ret) | |
1217 | *ret = o; | |
1218 | ||
1219 | if (offset) | |
1220 | *offset = p; | |
1221 | ||
1222 | if (idx) | |
1223 | *idx = t + i - (subtract_one ? 1 : 0); | |
1224 | ||
1225 | return 1; | |
cec736d2 LP |
1226 | } |
1227 | ||
de190aef LP |
1228 | static int generic_array_bisect_plus_one(JournalFile *f, |
1229 | uint64_t extra, | |
1230 | uint64_t first, | |
1231 | uint64_t n, | |
1232 | uint64_t needle, | |
1233 | int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle), | |
1234 | direction_t direction, | |
1235 | Object **ret, | |
1236 | uint64_t *offset, | |
1237 | uint64_t *idx) { | |
1238 | ||
cec736d2 LP |
1239 | int r; |
1240 | ||
1241 | assert(f); | |
de190aef | 1242 | assert(test_object); |
cec736d2 | 1243 | |
de190aef LP |
1244 | if (n <= 0) |
1245 | return 0; | |
cec736d2 | 1246 | |
de190aef LP |
1247 | /* This bisects the array in object 'first', but first checks |
1248 | * an extra */ | |
de190aef LP |
1249 | r = test_object(f, extra, needle); |
1250 | if (r < 0) | |
1251 | return r; | |
1252 | else if (r == TEST_FOUND) { | |
1253 | Object *o; | |
1254 | ||
1255 | r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o); | |
1256 | if (r < 0) | |
1257 | return r; | |
1258 | ||
1259 | if (ret) | |
1260 | *ret = o; | |
cec736d2 | 1261 | |
de190aef LP |
1262 | if (offset) |
1263 | *offset = extra; | |
440ee366 LP |
1264 | |
1265 | if (idx) | |
1266 | *idx = 0; | |
1267 | ||
1268 | return 1; | |
de190aef | 1269 | } else if (r == TEST_RIGHT) |
cec736d2 LP |
1270 | return 0; |
1271 | ||
de190aef LP |
1272 | r = generic_array_bisect(f, first, n-1, needle, test_object, direction, ret, offset, idx); |
1273 | ||
1274 | if (r > 0) | |
1275 | (*idx) ++; | |
1276 | ||
1277 | return r; | |
1278 | } | |
1279 | ||
1280 | static int test_object_seqnum(JournalFile *f, uint64_t p, uint64_t needle) { | |
1281 | Object *o; | |
1282 | int r; | |
1283 | ||
1284 | assert(f); | |
1285 | assert(p > 0); | |
1286 | ||
1287 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
cec736d2 LP |
1288 | if (r < 0) |
1289 | return r; | |
1290 | ||
de190aef LP |
1291 | if (le64toh(o->entry.seqnum) == needle) |
1292 | return TEST_FOUND; | |
1293 | else if (le64toh(o->entry.seqnum) < needle) | |
1294 | return TEST_LEFT; | |
1295 | else | |
1296 | return TEST_RIGHT; | |
1297 | } | |
cec736d2 | 1298 | |
de190aef LP |
1299 | int journal_file_move_to_entry_by_seqnum( |
1300 | JournalFile *f, | |
1301 | uint64_t seqnum, | |
1302 | direction_t direction, | |
1303 | Object **ret, | |
1304 | uint64_t *offset) { | |
1305 | ||
1306 | return generic_array_bisect(f, | |
1307 | le64toh(f->header->entry_array_offset), | |
1308 | le64toh(f->header->n_entries), | |
1309 | seqnum, | |
1310 | test_object_seqnum, | |
1311 | direction, | |
1312 | ret, offset, NULL); | |
1313 | } | |
cec736d2 | 1314 | |
de190aef LP |
1315 | static int test_object_realtime(JournalFile *f, uint64_t p, uint64_t needle) { |
1316 | Object *o; | |
1317 | int r; | |
1318 | ||
1319 | assert(f); | |
1320 | assert(p > 0); | |
1321 | ||
1322 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1323 | if (r < 0) | |
1324 | return r; | |
1325 | ||
1326 | if (le64toh(o->entry.realtime) == needle) | |
1327 | return TEST_FOUND; | |
1328 | else if (le64toh(o->entry.realtime) < needle) | |
1329 | return TEST_LEFT; | |
1330 | else | |
1331 | return TEST_RIGHT; | |
cec736d2 LP |
1332 | } |
1333 | ||
de190aef LP |
1334 | int journal_file_move_to_entry_by_realtime( |
1335 | JournalFile *f, | |
1336 | uint64_t realtime, | |
1337 | direction_t direction, | |
1338 | Object **ret, | |
1339 | uint64_t *offset) { | |
1340 | ||
1341 | return generic_array_bisect(f, | |
1342 | le64toh(f->header->entry_array_offset), | |
1343 | le64toh(f->header->n_entries), | |
1344 | realtime, | |
1345 | test_object_realtime, | |
1346 | direction, | |
1347 | ret, offset, NULL); | |
1348 | } | |
1349 | ||
1350 | static int test_object_monotonic(JournalFile *f, uint64_t p, uint64_t needle) { | |
1351 | Object *o; | |
1352 | int r; | |
1353 | ||
1354 | assert(f); | |
1355 | assert(p > 0); | |
1356 | ||
1357 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1358 | if (r < 0) | |
1359 | return r; | |
1360 | ||
1361 | if (le64toh(o->entry.monotonic) == needle) | |
1362 | return TEST_FOUND; | |
1363 | else if (le64toh(o->entry.monotonic) < needle) | |
1364 | return TEST_LEFT; | |
1365 | else | |
1366 | return TEST_RIGHT; | |
1367 | } | |
1368 | ||
1369 | int journal_file_move_to_entry_by_monotonic( | |
1370 | JournalFile *f, | |
1371 | sd_id128_t boot_id, | |
1372 | uint64_t monotonic, | |
1373 | direction_t direction, | |
1374 | Object **ret, | |
1375 | uint64_t *offset) { | |
1376 | ||
1377 | char t[8+32+1] = "_BOOT_ID="; | |
1378 | Object *o; | |
1379 | int r; | |
1380 | ||
1381 | sd_id128_to_string(boot_id, t + 8); | |
1382 | ||
1383 | r = journal_file_find_data_object(f, t, strlen(t), &o, NULL); | |
1384 | if (r < 0) | |
1385 | return r; | |
1386 | else if (r == 0) | |
1387 | return -ENOENT; | |
1388 | ||
1389 | return generic_array_bisect_plus_one(f, | |
1390 | le64toh(o->data.entry_offset), | |
1391 | le64toh(o->data.entry_array_offset), | |
1392 | le64toh(o->data.n_entries), | |
1393 | monotonic, | |
1394 | test_object_monotonic, | |
1395 | direction, | |
1396 | ret, offset, NULL); | |
1397 | } | |
1398 | ||
1399 | static int test_object_offset(JournalFile *f, uint64_t p, uint64_t needle) { | |
1400 | assert(f); | |
1401 | assert(p > 0); | |
1402 | ||
1403 | if (p == needle) | |
1404 | return TEST_FOUND; | |
1405 | else if (p < needle) | |
1406 | return TEST_LEFT; | |
1407 | else | |
1408 | return TEST_RIGHT; | |
1409 | } | |
1410 | ||
1411 | int journal_file_next_entry( | |
1412 | JournalFile *f, | |
1413 | Object *o, uint64_t p, | |
1414 | direction_t direction, | |
1415 | Object **ret, uint64_t *offset) { | |
1416 | ||
1417 | uint64_t i, n; | |
cec736d2 LP |
1418 | int r; |
1419 | ||
1420 | assert(f); | |
de190aef LP |
1421 | assert(p > 0 || !o); |
1422 | ||
1423 | n = le64toh(f->header->n_entries); | |
1424 | if (n <= 0) | |
1425 | return 0; | |
cec736d2 LP |
1426 | |
1427 | if (!o) | |
de190aef | 1428 | i = direction == DIRECTION_DOWN ? 0 : n - 1; |
cec736d2 | 1429 | else { |
de190aef | 1430 | if (o->object.type != OBJECT_ENTRY) |
cec736d2 LP |
1431 | return -EINVAL; |
1432 | ||
de190aef LP |
1433 | r = generic_array_bisect(f, |
1434 | le64toh(f->header->entry_array_offset), | |
1435 | le64toh(f->header->n_entries), | |
1436 | p, | |
1437 | test_object_offset, | |
1438 | DIRECTION_DOWN, | |
1439 | NULL, NULL, | |
1440 | &i); | |
1441 | if (r <= 0) | |
1442 | return r; | |
1443 | ||
1444 | if (direction == DIRECTION_DOWN) { | |
1445 | if (i >= n - 1) | |
1446 | return 0; | |
1447 | ||
1448 | i++; | |
1449 | } else { | |
1450 | if (i <= 0) | |
1451 | return 0; | |
1452 | ||
1453 | i--; | |
1454 | } | |
cec736d2 LP |
1455 | } |
1456 | ||
de190aef LP |
1457 | /* And jump to it */ |
1458 | return generic_array_get(f, | |
1459 | le64toh(f->header->entry_array_offset), | |
1460 | i, | |
1461 | ret, offset); | |
1462 | } | |
cec736d2 | 1463 | |
de190aef LP |
1464 | int journal_file_skip_entry( |
1465 | JournalFile *f, | |
1466 | Object *o, uint64_t p, | |
1467 | int64_t skip, | |
1468 | Object **ret, uint64_t *offset) { | |
1469 | ||
1470 | uint64_t i, n; | |
1471 | int r; | |
1472 | ||
1473 | assert(f); | |
1474 | assert(o); | |
1475 | assert(p > 0); | |
1476 | ||
1477 | if (o->object.type != OBJECT_ENTRY) | |
1478 | return -EINVAL; | |
1479 | ||
1480 | r = generic_array_bisect(f, | |
1481 | le64toh(f->header->entry_array_offset), | |
1482 | le64toh(f->header->n_entries), | |
1483 | p, | |
1484 | test_object_offset, | |
1485 | DIRECTION_DOWN, | |
1486 | NULL, NULL, | |
1487 | &i); | |
1488 | if (r <= 0) | |
cec736d2 LP |
1489 | return r; |
1490 | ||
de190aef LP |
1491 | /* Calculate new index */ |
1492 | if (skip < 0) { | |
1493 | if ((uint64_t) -skip >= i) | |
1494 | i = 0; | |
1495 | else | |
1496 | i = i - (uint64_t) -skip; | |
1497 | } else | |
1498 | i += (uint64_t) skip; | |
cec736d2 | 1499 | |
de190aef LP |
1500 | n = le64toh(f->header->n_entries); |
1501 | if (n <= 0) | |
1502 | return -EBADMSG; | |
cec736d2 | 1503 | |
de190aef LP |
1504 | if (i >= n) |
1505 | i = n-1; | |
1506 | ||
1507 | return generic_array_get(f, | |
1508 | le64toh(f->header->entry_array_offset), | |
1509 | i, | |
1510 | ret, offset); | |
cec736d2 LP |
1511 | } |
1512 | ||
de190aef LP |
1513 | int journal_file_next_entry_for_data( |
1514 | JournalFile *f, | |
1515 | Object *o, uint64_t p, | |
1516 | uint64_t data_offset, | |
1517 | direction_t direction, | |
1518 | Object **ret, uint64_t *offset) { | |
1519 | ||
1520 | uint64_t n, i; | |
cec736d2 | 1521 | int r; |
de190aef | 1522 | Object *d; |
cec736d2 LP |
1523 | |
1524 | assert(f); | |
de190aef | 1525 | assert(p > 0 || !o); |
cec736d2 | 1526 | |
de190aef | 1527 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
466ccd92 | 1528 | if (r < 0) |
de190aef | 1529 | return r; |
cec736d2 | 1530 | |
de190aef LP |
1531 | n = le64toh(d->data.n_entries); |
1532 | if (n <= 0) | |
1533 | return n; | |
cec736d2 | 1534 | |
de190aef LP |
1535 | if (!o) |
1536 | i = direction == DIRECTION_DOWN ? 0 : n - 1; | |
1537 | else { | |
1538 | if (o->object.type != OBJECT_ENTRY) | |
1539 | return -EINVAL; | |
cec736d2 | 1540 | |
de190aef LP |
1541 | r = generic_array_bisect_plus_one(f, |
1542 | le64toh(d->data.entry_offset), | |
1543 | le64toh(d->data.entry_array_offset), | |
1544 | le64toh(d->data.n_entries), | |
1545 | p, | |
1546 | test_object_offset, | |
1547 | DIRECTION_DOWN, | |
1548 | NULL, NULL, | |
1549 | &i); | |
1550 | ||
1551 | if (r <= 0) | |
cec736d2 LP |
1552 | return r; |
1553 | ||
de190aef LP |
1554 | if (direction == DIRECTION_DOWN) { |
1555 | if (i >= n - 1) | |
1556 | return 0; | |
cec736d2 | 1557 | |
de190aef LP |
1558 | i++; |
1559 | } else { | |
1560 | if (i <= 0) | |
1561 | return 0; | |
cec736d2 | 1562 | |
de190aef LP |
1563 | i--; |
1564 | } | |
cec736d2 | 1565 | |
de190aef | 1566 | } |
cec736d2 | 1567 | |
de190aef LP |
1568 | return generic_array_get_plus_one(f, |
1569 | le64toh(d->data.entry_offset), | |
1570 | le64toh(d->data.entry_array_offset), | |
1571 | i, | |
1572 | ret, offset); | |
1573 | } | |
cec736d2 | 1574 | |
de190aef LP |
1575 | int journal_file_move_to_entry_by_seqnum_for_data( |
1576 | JournalFile *f, | |
1577 | uint64_t data_offset, | |
1578 | uint64_t seqnum, | |
1579 | direction_t direction, | |
1580 | Object **ret, uint64_t *offset) { | |
cec736d2 | 1581 | |
de190aef LP |
1582 | Object *d; |
1583 | int r; | |
cec736d2 | 1584 | |
de190aef LP |
1585 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
1586 | if (r <= 0) | |
1587 | return r; | |
cec736d2 | 1588 | |
de190aef LP |
1589 | return generic_array_bisect_plus_one(f, |
1590 | le64toh(d->data.entry_offset), | |
1591 | le64toh(d->data.entry_array_offset), | |
1592 | le64toh(d->data.n_entries), | |
1593 | seqnum, | |
1594 | test_object_seqnum, | |
1595 | direction, | |
1596 | ret, offset, NULL); | |
1597 | } | |
cec736d2 | 1598 | |
de190aef LP |
1599 | int journal_file_move_to_entry_by_realtime_for_data( |
1600 | JournalFile *f, | |
1601 | uint64_t data_offset, | |
1602 | uint64_t realtime, | |
1603 | direction_t direction, | |
1604 | Object **ret, uint64_t *offset) { | |
1605 | ||
1606 | Object *d; | |
1607 | int r; | |
1608 | ||
1609 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); | |
1610 | if (r <= 0) | |
1611 | return r; | |
1612 | ||
1613 | return generic_array_bisect_plus_one(f, | |
1614 | le64toh(d->data.entry_offset), | |
1615 | le64toh(d->data.entry_array_offset), | |
1616 | le64toh(d->data.n_entries), | |
1617 | realtime, | |
1618 | test_object_realtime, | |
1619 | direction, | |
1620 | ret, offset, NULL); | |
cec736d2 LP |
1621 | } |
1622 | ||
1623 | void journal_file_dump(JournalFile *f) { | |
1624 | char a[33], b[33], c[33]; | |
1625 | Object *o; | |
1626 | int r; | |
1627 | uint64_t p; | |
1628 | ||
1629 | assert(f); | |
1630 | ||
de190aef LP |
1631 | printf("File Path: %s\n" |
1632 | "File ID: %s\n" | |
cec736d2 LP |
1633 | "Machine ID: %s\n" |
1634 | "Boot ID: %s\n" | |
de190aef LP |
1635 | "Arena size: %llu\n" |
1636 | "Objects: %lu\n" | |
1637 | "Entries: %lu\n", | |
1638 | f->path, | |
cec736d2 LP |
1639 | sd_id128_to_string(f->header->file_id, a), |
1640 | sd_id128_to_string(f->header->machine_id, b), | |
1641 | sd_id128_to_string(f->header->boot_id, c), | |
de190aef LP |
1642 | (unsigned long long) le64toh(f->header->arena_size), |
1643 | (unsigned long) le64toh(f->header->n_objects), | |
1644 | (unsigned long) le64toh(f->header->n_entries)); | |
cec736d2 | 1645 | |
de190aef | 1646 | p = le64toh(f->header->arena_offset); |
cec736d2 | 1647 | while (p != 0) { |
de190aef | 1648 | r = journal_file_move_to_object(f, -1, p, &o); |
cec736d2 LP |
1649 | if (r < 0) |
1650 | goto fail; | |
1651 | ||
1652 | switch (o->object.type) { | |
1653 | ||
1654 | case OBJECT_UNUSED: | |
1655 | printf("Type: OBJECT_UNUSED\n"); | |
1656 | break; | |
1657 | ||
1658 | case OBJECT_DATA: | |
1659 | printf("Type: OBJECT_DATA\n"); | |
1660 | break; | |
1661 | ||
1662 | case OBJECT_ENTRY: | |
3fbf9cbb LP |
1663 | printf("Type: OBJECT_ENTRY %llu %llu %llu\n", |
1664 | (unsigned long long) le64toh(o->entry.seqnum), | |
1665 | (unsigned long long) le64toh(o->entry.monotonic), | |
1666 | (unsigned long long) le64toh(o->entry.realtime)); | |
cec736d2 LP |
1667 | break; |
1668 | ||
de190aef LP |
1669 | case OBJECT_FIELD_HASH_TABLE: |
1670 | printf("Type: OBJECT_FIELD_HASH_TABLE\n"); | |
cec736d2 LP |
1671 | break; |
1672 | ||
de190aef LP |
1673 | case OBJECT_DATA_HASH_TABLE: |
1674 | printf("Type: OBJECT_DATA_HASH_TABLE\n"); | |
1675 | break; | |
1676 | ||
1677 | case OBJECT_ENTRY_ARRAY: | |
1678 | printf("Type: OBJECT_ENTRY_ARRAY\n"); | |
cec736d2 LP |
1679 | break; |
1680 | } | |
1681 | ||
807e17f0 LP |
1682 | if (o->object.flags & OBJECT_COMPRESSED) |
1683 | printf("Flags: COMPRESSED\n"); | |
1684 | ||
cec736d2 LP |
1685 | if (p == le64toh(f->header->tail_object_offset)) |
1686 | p = 0; | |
1687 | else | |
1688 | p = p + ALIGN64(le64toh(o->object.size)); | |
1689 | } | |
1690 | ||
1691 | return; | |
1692 | fail: | |
1693 | log_error("File corrupt"); | |
1694 | } | |
1695 | ||
1696 | int journal_file_open( | |
1697 | const char *fname, | |
1698 | int flags, | |
1699 | mode_t mode, | |
0ac38b70 | 1700 | JournalFile *template, |
cec736d2 LP |
1701 | JournalFile **ret) { |
1702 | ||
1703 | JournalFile *f; | |
1704 | int r; | |
1705 | bool newly_created = false; | |
1706 | ||
1707 | assert(fname); | |
1708 | ||
1709 | if ((flags & O_ACCMODE) != O_RDONLY && | |
1710 | (flags & O_ACCMODE) != O_RDWR) | |
1711 | return -EINVAL; | |
1712 | ||
1713 | f = new0(JournalFile, 1); | |
1714 | if (!f) | |
1715 | return -ENOMEM; | |
1716 | ||
0ac38b70 LP |
1717 | f->fd = -1; |
1718 | f->flags = flags; | |
1719 | f->mode = mode; | |
cec736d2 LP |
1720 | f->writable = (flags & O_ACCMODE) != O_RDONLY; |
1721 | f->prot = prot_from_flags(flags); | |
1722 | ||
cec736d2 LP |
1723 | f->path = strdup(fname); |
1724 | if (!f->path) { | |
1725 | r = -ENOMEM; | |
1726 | goto fail; | |
1727 | } | |
1728 | ||
0ac38b70 LP |
1729 | f->fd = open(f->path, f->flags|O_CLOEXEC, f->mode); |
1730 | if (f->fd < 0) { | |
1731 | r = -errno; | |
1732 | goto fail; | |
1733 | } | |
1734 | ||
cec736d2 LP |
1735 | if (fstat(f->fd, &f->last_stat) < 0) { |
1736 | r = -errno; | |
1737 | goto fail; | |
1738 | } | |
1739 | ||
1740 | if (f->last_stat.st_size == 0 && f->writable) { | |
1741 | newly_created = true; | |
1742 | ||
0ac38b70 | 1743 | r = journal_file_init_header(f, template); |
cec736d2 LP |
1744 | if (r < 0) |
1745 | goto fail; | |
1746 | ||
1747 | if (fstat(f->fd, &f->last_stat) < 0) { | |
1748 | r = -errno; | |
1749 | goto fail; | |
1750 | } | |
1751 | } | |
1752 | ||
1753 | if (f->last_stat.st_size < (off_t) sizeof(Header)) { | |
1754 | r = -EIO; | |
1755 | goto fail; | |
1756 | } | |
1757 | ||
1758 | f->header = mmap(NULL, PAGE_ALIGN(sizeof(Header)), prot_from_flags(flags), MAP_SHARED, f->fd, 0); | |
1759 | if (f->header == MAP_FAILED) { | |
1760 | f->header = NULL; | |
1761 | r = -errno; | |
1762 | goto fail; | |
1763 | } | |
1764 | ||
1765 | if (!newly_created) { | |
1766 | r = journal_file_verify_header(f); | |
1767 | if (r < 0) | |
1768 | goto fail; | |
1769 | } | |
1770 | ||
1771 | if (f->writable) { | |
1772 | r = journal_file_refresh_header(f); | |
1773 | if (r < 0) | |
1774 | goto fail; | |
1775 | } | |
1776 | ||
1777 | if (newly_created) { | |
1778 | ||
de190aef | 1779 | r = journal_file_setup_field_hash_table(f); |
cec736d2 LP |
1780 | if (r < 0) |
1781 | goto fail; | |
1782 | ||
de190aef | 1783 | r = journal_file_setup_data_hash_table(f); |
cec736d2 LP |
1784 | if (r < 0) |
1785 | goto fail; | |
1786 | } | |
1787 | ||
de190aef | 1788 | r = journal_file_map_field_hash_table(f); |
cec736d2 LP |
1789 | if (r < 0) |
1790 | goto fail; | |
1791 | ||
de190aef | 1792 | r = journal_file_map_data_hash_table(f); |
cec736d2 LP |
1793 | if (r < 0) |
1794 | goto fail; | |
1795 | ||
1796 | if (ret) | |
1797 | *ret = f; | |
1798 | ||
1799 | return 0; | |
1800 | ||
1801 | fail: | |
1802 | journal_file_close(f); | |
1803 | ||
1804 | return r; | |
1805 | } | |
0ac38b70 LP |
1806 | |
1807 | int journal_file_rotate(JournalFile **f) { | |
1808 | char *p; | |
1809 | size_t l; | |
1810 | JournalFile *old_file, *new_file = NULL; | |
1811 | int r; | |
1812 | ||
1813 | assert(f); | |
1814 | assert(*f); | |
1815 | ||
1816 | old_file = *f; | |
1817 | ||
1818 | if (!old_file->writable) | |
1819 | return -EINVAL; | |
1820 | ||
1821 | if (!endswith(old_file->path, ".journal")) | |
1822 | return -EINVAL; | |
1823 | ||
1824 | l = strlen(old_file->path); | |
1825 | ||
1826 | p = new(char, l + 1 + 16 + 1 + 32 + 1 + 16 + 1); | |
1827 | if (!p) | |
1828 | return -ENOMEM; | |
1829 | ||
1830 | memcpy(p, old_file->path, l - 8); | |
1831 | p[l-8] = '@'; | |
1832 | sd_id128_to_string(old_file->header->seqnum_id, p + l - 8 + 1); | |
1833 | snprintf(p + l - 8 + 1 + 32, 1 + 16 + 1 + 16 + 8 + 1, | |
1834 | "-%016llx-%016llx.journal", | |
1835 | (unsigned long long) le64toh((*f)->header->seqnum), | |
1836 | (unsigned long long) le64toh((*f)->header->tail_entry_realtime)); | |
1837 | ||
1838 | r = rename(old_file->path, p); | |
1839 | free(p); | |
1840 | ||
1841 | if (r < 0) | |
1842 | return -errno; | |
1843 | ||
1844 | old_file->header->state = le32toh(STATE_ARCHIVED); | |
1845 | ||
1846 | r = journal_file_open(old_file->path, old_file->flags, old_file->mode, old_file, &new_file); | |
1847 | journal_file_close(old_file); | |
1848 | ||
1849 | *f = new_file; | |
1850 | return r; | |
1851 | } | |
1852 | ||
1853 | struct vacuum_info { | |
1854 | off_t usage; | |
1855 | char *filename; | |
1856 | ||
1857 | uint64_t realtime; | |
1858 | sd_id128_t seqnum_id; | |
1859 | uint64_t seqnum; | |
1860 | }; | |
1861 | ||
1862 | static int vacuum_compare(const void *_a, const void *_b) { | |
1863 | const struct vacuum_info *a, *b; | |
1864 | ||
1865 | a = _a; | |
1866 | b = _b; | |
1867 | ||
1868 | if (sd_id128_equal(a->seqnum_id, b->seqnum_id)) { | |
1869 | if (a->seqnum < b->seqnum) | |
1870 | return -1; | |
1871 | else if (a->seqnum > b->seqnum) | |
1872 | return 1; | |
1873 | else | |
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | if (a->realtime < b->realtime) | |
1878 | return -1; | |
1879 | else if (a->realtime > b->realtime) | |
1880 | return 1; | |
1881 | else | |
1882 | return memcmp(&a->seqnum_id, &b->seqnum_id, 16); | |
1883 | } | |
1884 | ||
1885 | int journal_directory_vacuum(const char *directory, uint64_t max_use, uint64_t min_free) { | |
1886 | DIR *d; | |
1887 | int r = 0; | |
1888 | struct vacuum_info *list = NULL; | |
1889 | unsigned n_list = 0, n_allocated = 0, i; | |
1890 | uint64_t sum = 0; | |
1891 | ||
1892 | assert(directory); | |
1893 | ||
1894 | if (max_use <= 0) | |
babfc091 | 1895 | return 0; |
0ac38b70 LP |
1896 | |
1897 | d = opendir(directory); | |
1898 | if (!d) | |
1899 | return -errno; | |
1900 | ||
1901 | for (;;) { | |
1902 | int k; | |
1903 | struct dirent buf, *de; | |
1904 | size_t q; | |
1905 | struct stat st; | |
1906 | char *p; | |
1907 | unsigned long long seqnum, realtime; | |
1908 | sd_id128_t seqnum_id; | |
1909 | ||
1910 | k = readdir_r(d, &buf, &de); | |
1911 | if (k != 0) { | |
1912 | r = -k; | |
1913 | goto finish; | |
1914 | } | |
1915 | ||
1916 | if (!de) | |
1917 | break; | |
1918 | ||
1919 | if (!dirent_is_file_with_suffix(de, ".journal")) | |
1920 | continue; | |
1921 | ||
1922 | q = strlen(de->d_name); | |
1923 | ||
1924 | if (q < 1 + 32 + 1 + 16 + 1 + 16 + 8) | |
1925 | continue; | |
1926 | ||
1927 | if (de->d_name[q-8-16-1] != '-' || | |
1928 | de->d_name[q-8-16-1-16-1] != '-' || | |
1929 | de->d_name[q-8-16-1-16-1-32-1] != '@') | |
1930 | continue; | |
1931 | ||
1932 | if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) | |
1933 | continue; | |
1934 | ||
1935 | if (!S_ISREG(st.st_mode)) | |
1936 | continue; | |
1937 | ||
1938 | p = strdup(de->d_name); | |
1939 | if (!p) { | |
1940 | r = -ENOMEM; | |
1941 | goto finish; | |
1942 | } | |
1943 | ||
1944 | de->d_name[q-8-16-1-16-1] = 0; | |
1945 | if (sd_id128_from_string(de->d_name + q-8-16-1-16-1-32, &seqnum_id) < 0) { | |
1946 | free(p); | |
1947 | continue; | |
1948 | } | |
1949 | ||
1950 | if (sscanf(de->d_name + q-8-16-1-16, "%16llx-%16llx.journal", &seqnum, &realtime) != 2) { | |
1951 | free(p); | |
1952 | continue; | |
1953 | } | |
1954 | ||
1955 | if (n_list >= n_allocated) { | |
1956 | struct vacuum_info *j; | |
1957 | ||
1958 | n_allocated = MAX(n_allocated * 2U, 8U); | |
1959 | j = realloc(list, n_allocated * sizeof(struct vacuum_info)); | |
1960 | if (!j) { | |
1961 | free(p); | |
1962 | r = -ENOMEM; | |
1963 | goto finish; | |
1964 | } | |
1965 | ||
1966 | list = j; | |
1967 | } | |
1968 | ||
1969 | list[n_list].filename = p; | |
1970 | list[n_list].usage = (uint64_t) st.st_blksize * (uint64_t) st.st_blocks; | |
1971 | list[n_list].seqnum = seqnum; | |
1972 | list[n_list].realtime = realtime; | |
1973 | list[n_list].seqnum_id = seqnum_id; | |
1974 | ||
1975 | sum += list[n_list].usage; | |
1976 | ||
1977 | n_list ++; | |
1978 | } | |
1979 | ||
1980 | qsort(list, n_list, sizeof(struct vacuum_info), vacuum_compare); | |
1981 | ||
1982 | for(i = 0; i < n_list; i++) { | |
1983 | struct statvfs ss; | |
1984 | ||
1985 | if (fstatvfs(dirfd(d), &ss) < 0) { | |
1986 | r = -errno; | |
1987 | goto finish; | |
1988 | } | |
1989 | ||
1990 | if (sum <= max_use && | |
1991 | (uint64_t) ss.f_bavail * (uint64_t) ss.f_bsize >= min_free) | |
1992 | break; | |
1993 | ||
1994 | if (unlinkat(dirfd(d), list[i].filename, 0) >= 0) { | |
1995 | log_debug("Deleted archived journal %s/%s.", directory, list[i].filename); | |
1996 | sum -= list[i].usage; | |
1997 | } else if (errno != ENOENT) | |
1998 | log_warning("Failed to delete %s/%s: %m", directory, list[i].filename); | |
1999 | } | |
2000 | ||
2001 | finish: | |
2002 | for (i = 0; i < n_list; i++) | |
2003 | free(list[i].filename); | |
2004 | ||
2005 | free(list); | |
2006 | ||
de190aef LP |
2007 | if (d) |
2008 | closedir(d); | |
2009 | ||
0ac38b70 LP |
2010 | return r; |
2011 | } | |
cf244689 LP |
2012 | |
2013 | int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset) { | |
2014 | uint64_t i, n; | |
2015 | uint64_t q, xor_hash = 0; | |
2016 | int r; | |
2017 | EntryItem *items; | |
2018 | dual_timestamp ts; | |
2019 | ||
2020 | assert(from); | |
2021 | assert(to); | |
2022 | assert(o); | |
2023 | assert(p); | |
2024 | ||
2025 | if (!to->writable) | |
2026 | return -EPERM; | |
2027 | ||
2028 | ts.monotonic = le64toh(o->entry.monotonic); | |
2029 | ts.realtime = le64toh(o->entry.realtime); | |
2030 | ||
2031 | if (to->tail_entry_monotonic_valid && | |
2032 | ts.monotonic < le64toh(to->header->tail_entry_monotonic)) | |
2033 | return -EINVAL; | |
2034 | ||
2035 | if (ts.realtime < le64toh(to->header->tail_entry_realtime)) | |
2036 | return -EINVAL; | |
2037 | ||
2038 | n = journal_file_entry_n_items(o); | |
2039 | items = alloca(sizeof(EntryItem) * n); | |
2040 | ||
2041 | for (i = 0; i < n; i++) { | |
2042 | uint64_t le_hash, l, h; | |
2043 | size_t t; | |
2044 | void *data; | |
2045 | Object *u; | |
2046 | ||
2047 | q = le64toh(o->entry.items[i].object_offset); | |
2048 | le_hash = o->entry.items[i].hash; | |
2049 | ||
2050 | r = journal_file_move_to_object(from, OBJECT_DATA, q, &o); | |
2051 | if (r < 0) | |
2052 | return r; | |
2053 | ||
2054 | if (le_hash != o->data.hash) | |
2055 | return -EBADMSG; | |
2056 | ||
2057 | l = le64toh(o->object.size) - offsetof(Object, data.payload); | |
2058 | t = (size_t) l; | |
2059 | ||
2060 | /* We hit the limit on 32bit machines */ | |
2061 | if ((uint64_t) t != l) | |
2062 | return -E2BIG; | |
2063 | ||
2064 | if (o->object.flags & OBJECT_COMPRESSED) { | |
2065 | #ifdef HAVE_XZ | |
2066 | uint64_t rsize; | |
2067 | ||
2068 | if (!uncompress_blob(o->data.payload, l, &from->compress_buffer, &from->compress_buffer_size, &rsize)) | |
2069 | return -EBADMSG; | |
2070 | ||
2071 | data = from->compress_buffer; | |
2072 | l = rsize; | |
2073 | #else | |
2074 | return -EPROTONOSUPPORT; | |
2075 | #endif | |
2076 | } else | |
2077 | data = o->data.payload; | |
2078 | ||
2079 | r = journal_file_append_data(to, data, l, &u, &h); | |
2080 | if (r < 0) | |
2081 | return r; | |
2082 | ||
2083 | xor_hash ^= le64toh(u->data.hash); | |
2084 | items[i].object_offset = htole64(h); | |
2085 | items[i].hash = u->data.hash; | |
2086 | ||
2087 | r = journal_file_move_to_object(from, OBJECT_ENTRY, p, &o); | |
2088 | if (r < 0) | |
2089 | return r; | |
2090 | } | |
2091 | ||
2092 | return journal_file_append_entry_internal(to, &ts, xor_hash, items, n, seqnum, ret, offset); | |
2093 | } | |
babfc091 LP |
2094 | |
2095 | void journal_default_metrics(JournalMetrics *m, int fd) { | |
2096 | uint64_t fs_size = 0; | |
2097 | struct statvfs ss; | |
2098 | char a[64], b[64], c[64], d[64]; | |
2099 | ||
2100 | assert(m); | |
2101 | assert(fd >= 0); | |
2102 | ||
2103 | if (fstatvfs(fd, &ss) >= 0) | |
2104 | fs_size = ss.f_frsize * ss.f_blocks; | |
2105 | ||
2106 | if (m->max_use == (uint64_t) -1) { | |
2107 | ||
2108 | if (fs_size > 0) { | |
2109 | m->max_use = PAGE_ALIGN(fs_size / 10); /* 10% of file system size */ | |
2110 | ||
2111 | if (m->max_use > DEFAULT_MAX_USE_UPPER) | |
2112 | m->max_use = DEFAULT_MAX_USE_UPPER; | |
2113 | ||
2114 | if (m->max_use < DEFAULT_MAX_USE_LOWER) | |
2115 | m->max_use = DEFAULT_MAX_USE_LOWER; | |
2116 | } else | |
2117 | m->max_use = DEFAULT_MAX_USE_LOWER; | |
2118 | } else { | |
2119 | m->max_use = PAGE_ALIGN(m->max_use); | |
2120 | ||
2121 | if (m->max_use < JOURNAL_FILE_SIZE_MIN*2) | |
2122 | m->max_use = JOURNAL_FILE_SIZE_MIN*2; | |
2123 | } | |
2124 | ||
2125 | if (m->max_size == (uint64_t) -1) { | |
2126 | m->max_size = PAGE_ALIGN(m->max_use / 8); /* 8 chunks */ | |
2127 | ||
2128 | if (m->max_size > DEFAULT_MAX_SIZE_UPPER) | |
2129 | m->max_size = DEFAULT_MAX_SIZE_UPPER; | |
2130 | } else | |
2131 | m->max_size = PAGE_ALIGN(m->max_size); | |
2132 | ||
2133 | if (m->max_size < JOURNAL_FILE_SIZE_MIN) | |
2134 | m->max_size = JOURNAL_FILE_SIZE_MIN; | |
2135 | ||
2136 | if (m->max_size*2 > m->max_use) | |
2137 | m->max_use = m->max_size*2; | |
2138 | ||
2139 | if (m->min_size == (uint64_t) -1) | |
2140 | m->min_size = JOURNAL_FILE_SIZE_MIN; | |
2141 | else { | |
2142 | m->min_size = PAGE_ALIGN(m->min_size); | |
2143 | ||
2144 | if (m->min_size < JOURNAL_FILE_SIZE_MIN) | |
2145 | m->min_size = JOURNAL_FILE_SIZE_MIN; | |
2146 | ||
2147 | if (m->min_size > m->max_size) | |
2148 | m->max_size = m->min_size; | |
2149 | } | |
2150 | ||
2151 | if (m->keep_free == (uint64_t) -1) { | |
2152 | ||
2153 | if (fs_size > 0) { | |
2154 | m->keep_free = PAGE_ALIGN(fs_size / 20); /* 5% of file system size */ | |
2155 | ||
2156 | if (m->keep_free > DEFAULT_KEEP_FREE_UPPER) | |
2157 | m->keep_free = DEFAULT_KEEP_FREE_UPPER; | |
2158 | ||
2159 | } else | |
2160 | m->keep_free = DEFAULT_KEEP_FREE; | |
2161 | } | |
2162 | ||
2163 | log_debug("Fixed max_use=%s max_size=%s min_size=%s keep_free=%s", | |
2164 | format_bytes(a, sizeof(a), m->max_use), | |
2165 | format_bytes(b, sizeof(b), m->max_size), | |
2166 | format_bytes(c, sizeof(c), m->min_size), | |
2167 | format_bytes(d, sizeof(d), m->keep_free)); | |
2168 | } |