]>
Commit | Line | Data |
---|---|---|
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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
cec736d2 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
cec736d2 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
cec736d2 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
cec736d2 | 22 | #include <errno.h> |
cec736d2 | 23 | #include <fcntl.h> |
11689d2a | 24 | #include <linux/fs.h> |
07630cea LP |
25 | #include <stddef.h> |
26 | #include <sys/mman.h> | |
27 | #include <sys/statvfs.h> | |
28 | #include <sys/uio.h> | |
29 | #include <unistd.h> | |
fb0951b0 | 30 | |
b5efdb8a | 31 | #include "alloc-util.h" |
f27a3864 | 32 | #include "btrfs-util.h" |
c8b3094d | 33 | #include "chattr-util.h" |
07630cea | 34 | #include "compress.h" |
3ffd4af2 | 35 | #include "fd-util.h" |
0284adc6 | 36 | #include "journal-authenticate.h" |
cec736d2 LP |
37 | #include "journal-def.h" |
38 | #include "journal-file.h" | |
39 | #include "lookup3.h" | |
6bedfcbb | 40 | #include "parse-util.h" |
3df3e884 | 41 | #include "random-util.h" |
07630cea | 42 | #include "string-util.h" |
89a5a90c | 43 | #include "xattr-util.h" |
cec736d2 | 44 | |
4a92baf3 LP |
45 | #define DEFAULT_DATA_HASH_TABLE_SIZE (2047ULL*sizeof(HashItem)) |
46 | #define DEFAULT_FIELD_HASH_TABLE_SIZE (333ULL*sizeof(HashItem)) | |
cec736d2 | 47 | |
be19b7df | 48 | #define COMPRESSION_SIZE_THRESHOLD (512ULL) |
807e17f0 | 49 | |
babfc091 | 50 | /* This is the minimum journal file size */ |
16098e93 | 51 | #define JOURNAL_FILE_SIZE_MIN (512ULL*1024ULL) /* 512 KiB */ |
babfc091 LP |
52 | |
53 | /* These are the lower and upper bounds if we deduce the max_use value | |
54 | * from the file system size */ | |
55 | #define DEFAULT_MAX_USE_LOWER (1ULL*1024ULL*1024ULL) /* 1 MiB */ | |
56 | #define DEFAULT_MAX_USE_UPPER (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ | |
57 | ||
8580d1f7 LP |
58 | /* This is the default minimal use limit, how much we'll use even if keep_free suggests otherwise. */ |
59 | #define DEFAULT_MIN_USE (1ULL*1024ULL*1024ULL) /* 1 MiB */ | |
60 | ||
babfc091 | 61 | /* This is the upper bound if we deduce max_size from max_use */ |
71100051 | 62 | #define DEFAULT_MAX_SIZE_UPPER (128ULL*1024ULL*1024ULL) /* 128 MiB */ |
babfc091 LP |
63 | |
64 | /* This is the upper bound if we deduce the keep_free value from the | |
65 | * file system size */ | |
66 | #define DEFAULT_KEEP_FREE_UPPER (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */ | |
67 | ||
68 | /* This is the keep_free value when we can't determine the system | |
69 | * size */ | |
70 | #define DEFAULT_KEEP_FREE (1024ULL*1024ULL) /* 1 MB */ | |
71 | ||
8580d1f7 LP |
72 | /* This is the default maximum number of journal files to keep around. */ |
73 | #define DEFAULT_N_MAX_FILES (100) | |
74 | ||
dca6219e LP |
75 | /* n_data was the first entry we added after the initial file format design */ |
76 | #define HEADER_SIZE_MIN ALIGN64(offsetof(Header, n_data)) | |
cec736d2 | 77 | |
a4bcff5b LP |
78 | /* How many entries to keep in the entry array chain cache at max */ |
79 | #define CHAIN_CACHE_MAX 20 | |
80 | ||
a676e665 LP |
81 | /* How much to increase the journal file size at once each time we allocate something new. */ |
82 | #define FILE_SIZE_INCREASE (8ULL*1024ULL*1024ULL) /* 8MB */ | |
83 | ||
2678031a LP |
84 | /* Reread fstat() of the file for detecting deletions at least this often */ |
85 | #define LAST_STAT_REFRESH_USEC (5*USEC_PER_SEC) | |
86 | ||
fa6ac760 LP |
87 | /* The mmap context to use for the header we pick as one above the last defined typed */ |
88 | #define CONTEXT_HEADER _OBJECT_TYPE_MAX | |
89 | ||
9588bc32 | 90 | static int journal_file_set_online(JournalFile *f) { |
26687bf8 OS |
91 | assert(f); |
92 | ||
93 | if (!f->writable) | |
94 | return -EPERM; | |
95 | ||
96 | if (!(f->fd >= 0 && f->header)) | |
97 | return -EINVAL; | |
98 | ||
fa6ac760 LP |
99 | if (mmap_cache_got_sigbus(f->mmap, f->fd)) |
100 | return -EIO; | |
101 | ||
26687bf8 OS |
102 | switch(f->header->state) { |
103 | case STATE_ONLINE: | |
104 | return 0; | |
105 | ||
106 | case STATE_OFFLINE: | |
107 | f->header->state = STATE_ONLINE; | |
108 | fsync(f->fd); | |
109 | return 0; | |
110 | ||
111 | default: | |
112 | return -EINVAL; | |
113 | } | |
114 | } | |
115 | ||
116 | int journal_file_set_offline(JournalFile *f) { | |
117 | assert(f); | |
118 | ||
119 | if (!f->writable) | |
120 | return -EPERM; | |
121 | ||
122 | if (!(f->fd >= 0 && f->header)) | |
123 | return -EINVAL; | |
124 | ||
125 | if (f->header->state != STATE_ONLINE) | |
126 | return 0; | |
127 | ||
128 | fsync(f->fd); | |
129 | ||
fa6ac760 LP |
130 | if (mmap_cache_got_sigbus(f->mmap, f->fd)) |
131 | return -EIO; | |
132 | ||
26687bf8 OS |
133 | f->header->state = STATE_OFFLINE; |
134 | ||
fa6ac760 LP |
135 | if (mmap_cache_got_sigbus(f->mmap, f->fd)) |
136 | return -EIO; | |
137 | ||
26687bf8 OS |
138 | fsync(f->fd); |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
804ae586 | 143 | JournalFile* journal_file_close(JournalFile *f) { |
de190aef | 144 | assert(f); |
cec736d2 | 145 | |
feb12d3e | 146 | #ifdef HAVE_GCRYPT |
b0af6f41 | 147 | /* Write the final tag */ |
c586dbf1 | 148 | if (f->seal && f->writable) |
b0af6f41 | 149 | journal_file_append_tag(f); |
feb12d3e | 150 | #endif |
b0af6f41 | 151 | |
26687bf8 | 152 | journal_file_set_offline(f); |
cec736d2 | 153 | |
fa6ac760 LP |
154 | if (f->mmap && f->fd >= 0) |
155 | mmap_cache_close_fd(f->mmap, f->fd); | |
cec736d2 | 156 | |
11689d2a LP |
157 | if (f->fd >= 0 && f->defrag_on_close) { |
158 | ||
159 | /* Be friendly to btrfs: turn COW back on again now, | |
160 | * and defragment the file. We won't write to the file | |
161 | * ever again, hence remove all fragmentation, and | |
162 | * reenable all the good bits COW usually provides | |
163 | * (such as data checksumming). */ | |
164 | ||
1ed8f8c1 | 165 | (void) chattr_fd(f->fd, 0, FS_NOCOW_FL); |
11689d2a LP |
166 | (void) btrfs_defrag_fd(f->fd); |
167 | } | |
f27a3864 | 168 | |
03e334a1 | 169 | safe_close(f->fd); |
cec736d2 | 170 | free(f->path); |
807e17f0 | 171 | |
16e9f408 LP |
172 | if (f->mmap) |
173 | mmap_cache_unref(f->mmap); | |
174 | ||
4743015d | 175 | ordered_hashmap_free_free(f->chain_cache); |
a4bcff5b | 176 | |
d89c8fdf | 177 | #if defined(HAVE_XZ) || defined(HAVE_LZ4) |
807e17f0 LP |
178 | free(f->compress_buffer); |
179 | #endif | |
180 | ||
7560fffc | 181 | #ifdef HAVE_GCRYPT |
baed47c3 LP |
182 | if (f->fss_file) |
183 | munmap(f->fss_file, PAGE_ALIGN(f->fss_file_size)); | |
dc4ebc07 | 184 | else |
b7c9ae91 LP |
185 | free(f->fsprg_state); |
186 | ||
187 | free(f->fsprg_seed); | |
7560fffc LP |
188 | |
189 | if (f->hmac) | |
190 | gcry_md_close(f->hmac); | |
191 | #endif | |
192 | ||
cec736d2 | 193 | free(f); |
804ae586 | 194 | return NULL; |
cec736d2 LP |
195 | } |
196 | ||
0ac38b70 | 197 | static int journal_file_init_header(JournalFile *f, JournalFile *template) { |
d89c8fdf | 198 | Header h = {}; |
cec736d2 LP |
199 | ssize_t k; |
200 | int r; | |
201 | ||
202 | assert(f); | |
203 | ||
7560fffc | 204 | memcpy(h.signature, HEADER_SIGNATURE, 8); |
23b0b2b2 | 205 | h.header_size = htole64(ALIGN64(sizeof(h))); |
cec736d2 | 206 | |
d89c8fdf ZJS |
207 | h.incompatible_flags |= htole32( |
208 | f->compress_xz * HEADER_INCOMPATIBLE_COMPRESSED_XZ | | |
209 | f->compress_lz4 * HEADER_INCOMPATIBLE_COMPRESSED_LZ4); | |
7560fffc | 210 | |
d89c8fdf ZJS |
211 | h.compatible_flags = htole32( |
212 | f->seal * HEADER_COMPATIBLE_SEALED); | |
7560fffc | 213 | |
cec736d2 LP |
214 | r = sd_id128_randomize(&h.file_id); |
215 | if (r < 0) | |
216 | return r; | |
217 | ||
0ac38b70 LP |
218 | if (template) { |
219 | h.seqnum_id = template->header->seqnum_id; | |
beec0085 | 220 | h.tail_entry_seqnum = template->header->tail_entry_seqnum; |
0ac38b70 LP |
221 | } else |
222 | h.seqnum_id = h.file_id; | |
cec736d2 LP |
223 | |
224 | k = pwrite(f->fd, &h, sizeof(h), 0); | |
225 | if (k < 0) | |
226 | return -errno; | |
227 | ||
228 | if (k != sizeof(h)) | |
229 | return -EIO; | |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
234 | static int journal_file_refresh_header(JournalFile *f) { | |
de190aef | 235 | sd_id128_t boot_id; |
fa6ac760 | 236 | int r; |
cec736d2 LP |
237 | |
238 | assert(f); | |
239 | ||
240 | r = sd_id128_get_machine(&f->header->machine_id); | |
241 | if (r < 0) | |
242 | return r; | |
243 | ||
de190aef | 244 | r = sd_id128_get_boot(&boot_id); |
cec736d2 LP |
245 | if (r < 0) |
246 | return r; | |
247 | ||
de190aef LP |
248 | if (sd_id128_equal(boot_id, f->header->boot_id)) |
249 | f->tail_entry_monotonic_valid = true; | |
250 | ||
251 | f->header->boot_id = boot_id; | |
252 | ||
fa6ac760 | 253 | r = journal_file_set_online(f); |
b788cc23 | 254 | |
7560fffc | 255 | /* Sync the online state to disk */ |
a676e665 | 256 | fsync(f->fd); |
b788cc23 | 257 | |
fa6ac760 | 258 | return r; |
cec736d2 LP |
259 | } |
260 | ||
261 | static int journal_file_verify_header(JournalFile *f) { | |
d89c8fdf ZJS |
262 | uint32_t flags; |
263 | ||
cec736d2 LP |
264 | assert(f); |
265 | ||
7560fffc | 266 | if (memcmp(f->header->signature, HEADER_SIGNATURE, 8)) |
cec736d2 LP |
267 | return -EBADMSG; |
268 | ||
7560fffc LP |
269 | /* In both read and write mode we refuse to open files with |
270 | * incompatible flags we don't know */ | |
d89c8fdf ZJS |
271 | flags = le32toh(f->header->incompatible_flags); |
272 | if (flags & ~HEADER_INCOMPATIBLE_SUPPORTED) { | |
273 | if (flags & ~HEADER_INCOMPATIBLE_ANY) | |
274 | log_debug("Journal file %s has unknown incompatible flags %"PRIx32, | |
275 | f->path, flags & ~HEADER_INCOMPATIBLE_ANY); | |
276 | flags = (flags & HEADER_INCOMPATIBLE_ANY) & ~HEADER_INCOMPATIBLE_SUPPORTED; | |
277 | if (flags) | |
278 | log_debug("Journal file %s uses incompatible flags %"PRIx32 | |
279 | " disabled at compilation time.", f->path, flags); | |
cec736d2 | 280 | return -EPROTONOSUPPORT; |
d89c8fdf | 281 | } |
cec736d2 | 282 | |
7560fffc LP |
283 | /* When open for writing we refuse to open files with |
284 | * compatible flags, too */ | |
d89c8fdf ZJS |
285 | flags = le32toh(f->header->compatible_flags); |
286 | if (f->writable && (flags & ~HEADER_COMPATIBLE_SUPPORTED)) { | |
287 | if (flags & ~HEADER_COMPATIBLE_ANY) | |
288 | log_debug("Journal file %s has unknown compatible flags %"PRIx32, | |
289 | f->path, flags & ~HEADER_COMPATIBLE_ANY); | |
290 | flags = (flags & HEADER_COMPATIBLE_ANY) & ~HEADER_COMPATIBLE_SUPPORTED; | |
291 | if (flags) | |
292 | log_debug("Journal file %s uses compatible flags %"PRIx32 | |
293 | " disabled at compilation time.", f->path, flags); | |
294 | return -EPROTONOSUPPORT; | |
7560fffc LP |
295 | } |
296 | ||
db11ac1a LP |
297 | if (f->header->state >= _STATE_MAX) |
298 | return -EBADMSG; | |
299 | ||
dca6219e LP |
300 | /* The first addition was n_data, so check that we are at least this large */ |
301 | if (le64toh(f->header->header_size) < HEADER_SIZE_MIN) | |
23b0b2b2 LP |
302 | return -EBADMSG; |
303 | ||
8088cbd3 | 304 | if (JOURNAL_HEADER_SEALED(f->header) && !JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays)) |
beec0085 LP |
305 | return -EBADMSG; |
306 | ||
db11ac1a LP |
307 | if ((le64toh(f->header->header_size) + le64toh(f->header->arena_size)) > (uint64_t) f->last_stat.st_size) |
308 | return -ENODATA; | |
309 | ||
310 | if (le64toh(f->header->tail_object_offset) > (le64toh(f->header->header_size) + le64toh(f->header->arena_size))) | |
311 | return -ENODATA; | |
312 | ||
7762e02b LP |
313 | if (!VALID64(le64toh(f->header->data_hash_table_offset)) || |
314 | !VALID64(le64toh(f->header->field_hash_table_offset)) || | |
315 | !VALID64(le64toh(f->header->tail_object_offset)) || | |
316 | !VALID64(le64toh(f->header->entry_array_offset))) | |
317 | return -ENODATA; | |
318 | ||
cec736d2 | 319 | if (f->writable) { |
ccdbaf91 | 320 | uint8_t state; |
cec736d2 LP |
321 | sd_id128_t machine_id; |
322 | int r; | |
323 | ||
324 | r = sd_id128_get_machine(&machine_id); | |
325 | if (r < 0) | |
326 | return r; | |
327 | ||
328 | if (!sd_id128_equal(machine_id, f->header->machine_id)) | |
329 | return -EHOSTDOWN; | |
330 | ||
de190aef | 331 | state = f->header->state; |
cec736d2 | 332 | |
71fa6f00 LP |
333 | if (state == STATE_ONLINE) { |
334 | log_debug("Journal file %s is already online. Assuming unclean closing.", f->path); | |
335 | return -EBUSY; | |
336 | } else if (state == STATE_ARCHIVED) | |
cec736d2 | 337 | return -ESHUTDOWN; |
71fa6f00 | 338 | else if (state != STATE_OFFLINE) { |
8facc349 | 339 | log_debug("Journal file %s has unknown state %i.", f->path, state); |
71fa6f00 LP |
340 | return -EBUSY; |
341 | } | |
cec736d2 LP |
342 | } |
343 | ||
d89c8fdf ZJS |
344 | f->compress_xz = JOURNAL_HEADER_COMPRESSED_XZ(f->header); |
345 | f->compress_lz4 = JOURNAL_HEADER_COMPRESSED_LZ4(f->header); | |
c586dbf1 | 346 | |
f1889c91 | 347 | f->seal = JOURNAL_HEADER_SEALED(f->header); |
7560fffc | 348 | |
cec736d2 LP |
349 | return 0; |
350 | } | |
351 | ||
2678031a LP |
352 | static int journal_file_fstat(JournalFile *f) { |
353 | assert(f); | |
354 | assert(f->fd >= 0); | |
355 | ||
356 | if (fstat(f->fd, &f->last_stat) < 0) | |
357 | return -errno; | |
358 | ||
359 | f->last_stat_usec = now(CLOCK_MONOTONIC); | |
360 | ||
361 | /* Refuse appending to files that are already deleted */ | |
362 | if (f->last_stat.st_nlink <= 0) | |
363 | return -EIDRM; | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
cec736d2 | 368 | static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size) { |
eda4b58b | 369 | uint64_t old_size, new_size; |
fec2aa2f | 370 | int r; |
cec736d2 LP |
371 | |
372 | assert(f); | |
373 | ||
cec736d2 | 374 | /* We assume that this file is not sparse, and we know that |
38ac38b2 | 375 | * for sure, since we always call posix_fallocate() |
cec736d2 LP |
376 | * ourselves */ |
377 | ||
fa6ac760 LP |
378 | if (mmap_cache_got_sigbus(f->mmap, f->fd)) |
379 | return -EIO; | |
380 | ||
cec736d2 | 381 | old_size = |
23b0b2b2 | 382 | le64toh(f->header->header_size) + |
cec736d2 LP |
383 | le64toh(f->header->arena_size); |
384 | ||
bc85bfee | 385 | new_size = PAGE_ALIGN(offset + size); |
23b0b2b2 LP |
386 | if (new_size < le64toh(f->header->header_size)) |
387 | new_size = le64toh(f->header->header_size); | |
bc85bfee | 388 | |
2678031a LP |
389 | if (new_size <= old_size) { |
390 | ||
391 | /* We already pre-allocated enough space, but before | |
392 | * we write to it, let's check with fstat() if the | |
393 | * file got deleted, in order make sure we don't throw | |
394 | * away the data immediately. Don't check fstat() for | |
395 | * all writes though, but only once ever 10s. */ | |
396 | ||
397 | if (f->last_stat_usec + LAST_STAT_REFRESH_USEC > now(CLOCK_MONOTONIC)) | |
398 | return 0; | |
399 | ||
400 | return journal_file_fstat(f); | |
401 | } | |
402 | ||
403 | /* Allocate more space. */ | |
cec736d2 | 404 | |
a676e665 | 405 | if (f->metrics.max_size > 0 && new_size > f->metrics.max_size) |
bc85bfee | 406 | return -E2BIG; |
cec736d2 | 407 | |
a676e665 | 408 | if (new_size > f->metrics.min_size && f->metrics.keep_free > 0) { |
cec736d2 LP |
409 | struct statvfs svfs; |
410 | ||
411 | if (fstatvfs(f->fd, &svfs) >= 0) { | |
412 | uint64_t available; | |
413 | ||
070052ab | 414 | available = LESS_BY((uint64_t) svfs.f_bfree * (uint64_t) svfs.f_bsize, f->metrics.keep_free); |
cec736d2 LP |
415 | |
416 | if (new_size - old_size > available) | |
417 | return -E2BIG; | |
418 | } | |
419 | } | |
420 | ||
eda4b58b LP |
421 | /* Increase by larger blocks at once */ |
422 | new_size = ((new_size+FILE_SIZE_INCREASE-1) / FILE_SIZE_INCREASE) * FILE_SIZE_INCREASE; | |
423 | if (f->metrics.max_size > 0 && new_size > f->metrics.max_size) | |
424 | new_size = f->metrics.max_size; | |
425 | ||
bc85bfee LP |
426 | /* Note that the glibc fallocate() fallback is very |
427 | inefficient, hence we try to minimize the allocation area | |
428 | as we can. */ | |
fec2aa2f GV |
429 | r = posix_fallocate(f->fd, old_size, new_size - old_size); |
430 | if (r != 0) | |
431 | return -r; | |
cec736d2 | 432 | |
23b0b2b2 | 433 | f->header->arena_size = htole64(new_size - le64toh(f->header->header_size)); |
cec736d2 | 434 | |
2678031a | 435 | return journal_file_fstat(f); |
cec736d2 LP |
436 | } |
437 | ||
78519831 | 438 | static unsigned type_to_context(ObjectType type) { |
d3d3208f | 439 | /* One context for each type, plus one catch-all for the rest */ |
69adae51 | 440 | assert_cc(_OBJECT_TYPE_MAX <= MMAP_CACHE_MAX_CONTEXTS); |
fa6ac760 | 441 | assert_cc(CONTEXT_HEADER < MMAP_CACHE_MAX_CONTEXTS); |
d05089d8 | 442 | return type > OBJECT_UNUSED && type < _OBJECT_TYPE_MAX ? type : 0; |
d3d3208f MS |
443 | } |
444 | ||
7a9dabea | 445 | static int journal_file_move_to(JournalFile *f, ObjectType type, bool keep_always, uint64_t offset, uint64_t size, void **ret) { |
2678031a LP |
446 | int r; |
447 | ||
cec736d2 | 448 | assert(f); |
cec736d2 LP |
449 | assert(ret); |
450 | ||
7762e02b LP |
451 | if (size <= 0) |
452 | return -EINVAL; | |
453 | ||
2a59ea54 | 454 | /* Avoid SIGBUS on invalid accesses */ |
4bbdcdb3 LP |
455 | if (offset + size > (uint64_t) f->last_stat.st_size) { |
456 | /* Hmm, out of range? Let's refresh the fstat() data | |
457 | * first, before we trust that check. */ | |
458 | ||
2678031a LP |
459 | r = journal_file_fstat(f); |
460 | if (r < 0) | |
461 | return r; | |
462 | ||
463 | if (offset + size > (uint64_t) f->last_stat.st_size) | |
4bbdcdb3 LP |
464 | return -EADDRNOTAVAIL; |
465 | } | |
466 | ||
7a9dabea | 467 | return mmap_cache_get(f->mmap, f->fd, f->prot, type_to_context(type), keep_always, offset, size, &f->last_stat, ret); |
cec736d2 LP |
468 | } |
469 | ||
16e9f408 LP |
470 | static uint64_t minimum_header_size(Object *o) { |
471 | ||
b8e891e6 | 472 | static const uint64_t table[] = { |
16e9f408 LP |
473 | [OBJECT_DATA] = sizeof(DataObject), |
474 | [OBJECT_FIELD] = sizeof(FieldObject), | |
475 | [OBJECT_ENTRY] = sizeof(EntryObject), | |
476 | [OBJECT_DATA_HASH_TABLE] = sizeof(HashTableObject), | |
477 | [OBJECT_FIELD_HASH_TABLE] = sizeof(HashTableObject), | |
478 | [OBJECT_ENTRY_ARRAY] = sizeof(EntryArrayObject), | |
479 | [OBJECT_TAG] = sizeof(TagObject), | |
480 | }; | |
481 | ||
482 | if (o->object.type >= ELEMENTSOF(table) || table[o->object.type] <= 0) | |
483 | return sizeof(ObjectHeader); | |
484 | ||
485 | return table[o->object.type]; | |
486 | } | |
487 | ||
78519831 | 488 | int journal_file_move_to_object(JournalFile *f, ObjectType type, uint64_t offset, Object **ret) { |
cec736d2 LP |
489 | int r; |
490 | void *t; | |
491 | Object *o; | |
492 | uint64_t s; | |
493 | ||
494 | assert(f); | |
495 | assert(ret); | |
496 | ||
db11ac1a LP |
497 | /* Objects may only be located at multiple of 64 bit */ |
498 | if (!VALID64(offset)) | |
499 | return -EFAULT; | |
500 | ||
7a9dabea | 501 | r = journal_file_move_to(f, type, false, offset, sizeof(ObjectHeader), &t); |
cec736d2 LP |
502 | if (r < 0) |
503 | return r; | |
504 | ||
505 | o = (Object*) t; | |
506 | s = le64toh(o->object.size); | |
507 | ||
508 | if (s < sizeof(ObjectHeader)) | |
509 | return -EBADMSG; | |
510 | ||
16e9f408 LP |
511 | if (o->object.type <= OBJECT_UNUSED) |
512 | return -EBADMSG; | |
513 | ||
514 | if (s < minimum_header_size(o)) | |
515 | return -EBADMSG; | |
516 | ||
d05089d8 | 517 | if (type > OBJECT_UNUSED && o->object.type != type) |
cec736d2 LP |
518 | return -EBADMSG; |
519 | ||
520 | if (s > sizeof(ObjectHeader)) { | |
7a9dabea | 521 | r = journal_file_move_to(f, type, false, offset, s, &t); |
cec736d2 LP |
522 | if (r < 0) |
523 | return r; | |
524 | ||
525 | o = (Object*) t; | |
526 | } | |
527 | ||
cec736d2 LP |
528 | *ret = o; |
529 | return 0; | |
530 | } | |
531 | ||
d98cc1f2 | 532 | static uint64_t journal_file_entry_seqnum(JournalFile *f, uint64_t *seqnum) { |
cec736d2 LP |
533 | uint64_t r; |
534 | ||
535 | assert(f); | |
536 | ||
beec0085 | 537 | r = le64toh(f->header->tail_entry_seqnum) + 1; |
c2373f84 LP |
538 | |
539 | if (seqnum) { | |
de190aef | 540 | /* If an external seqnum counter was passed, we update |
c2373f84 LP |
541 | * both the local and the external one, and set it to |
542 | * the maximum of both */ | |
543 | ||
544 | if (*seqnum + 1 > r) | |
545 | r = *seqnum + 1; | |
546 | ||
547 | *seqnum = r; | |
548 | } | |
549 | ||
beec0085 | 550 | f->header->tail_entry_seqnum = htole64(r); |
cec736d2 | 551 | |
beec0085 LP |
552 | if (f->header->head_entry_seqnum == 0) |
553 | f->header->head_entry_seqnum = htole64(r); | |
de190aef | 554 | |
cec736d2 LP |
555 | return r; |
556 | } | |
557 | ||
78519831 | 558 | int journal_file_append_object(JournalFile *f, ObjectType type, uint64_t size, Object **ret, uint64_t *offset) { |
cec736d2 LP |
559 | int r; |
560 | uint64_t p; | |
561 | Object *tail, *o; | |
562 | void *t; | |
563 | ||
564 | assert(f); | |
d05089d8 | 565 | assert(type > OBJECT_UNUSED && type < _OBJECT_TYPE_MAX); |
cec736d2 LP |
566 | assert(size >= sizeof(ObjectHeader)); |
567 | assert(offset); | |
568 | assert(ret); | |
569 | ||
26687bf8 OS |
570 | r = journal_file_set_online(f); |
571 | if (r < 0) | |
572 | return r; | |
573 | ||
cec736d2 | 574 | p = le64toh(f->header->tail_object_offset); |
cec736d2 | 575 | if (p == 0) |
23b0b2b2 | 576 | p = le64toh(f->header->header_size); |
cec736d2 | 577 | else { |
d05089d8 | 578 | r = journal_file_move_to_object(f, OBJECT_UNUSED, p, &tail); |
cec736d2 LP |
579 | if (r < 0) |
580 | return r; | |
581 | ||
582 | p += ALIGN64(le64toh(tail->object.size)); | |
583 | } | |
584 | ||
585 | r = journal_file_allocate(f, p, size); | |
586 | if (r < 0) | |
587 | return r; | |
588 | ||
fcde2389 | 589 | r = journal_file_move_to(f, type, false, p, size, &t); |
cec736d2 LP |
590 | if (r < 0) |
591 | return r; | |
592 | ||
593 | o = (Object*) t; | |
594 | ||
595 | zero(o->object); | |
de190aef | 596 | o->object.type = type; |
cec736d2 LP |
597 | o->object.size = htole64(size); |
598 | ||
599 | f->header->tail_object_offset = htole64(p); | |
cec736d2 LP |
600 | f->header->n_objects = htole64(le64toh(f->header->n_objects) + 1); |
601 | ||
602 | *ret = o; | |
603 | *offset = p; | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
de190aef | 608 | static int journal_file_setup_data_hash_table(JournalFile *f) { |
cec736d2 LP |
609 | uint64_t s, p; |
610 | Object *o; | |
611 | int r; | |
612 | ||
613 | assert(f); | |
614 | ||
070052ab LP |
615 | /* We estimate that we need 1 hash table entry per 768 bytes |
616 | of journal file and we want to make sure we never get | |
617 | beyond 75% fill level. Calculate the hash table size for | |
618 | the maximum file size based on these metrics. */ | |
4a92baf3 | 619 | |
dfabe643 | 620 | s = (f->metrics.max_size * 4 / 768 / 3) * sizeof(HashItem); |
4a92baf3 LP |
621 | if (s < DEFAULT_DATA_HASH_TABLE_SIZE) |
622 | s = DEFAULT_DATA_HASH_TABLE_SIZE; | |
623 | ||
507f22bd | 624 | log_debug("Reserving %"PRIu64" entries in hash table.", s / sizeof(HashItem)); |
4a92baf3 | 625 | |
de190aef LP |
626 | r = journal_file_append_object(f, |
627 | OBJECT_DATA_HASH_TABLE, | |
628 | offsetof(Object, hash_table.items) + s, | |
629 | &o, &p); | |
cec736d2 LP |
630 | if (r < 0) |
631 | return r; | |
632 | ||
29804cc1 | 633 | memzero(o->hash_table.items, s); |
cec736d2 | 634 | |
de190aef LP |
635 | f->header->data_hash_table_offset = htole64(p + offsetof(Object, hash_table.items)); |
636 | f->header->data_hash_table_size = htole64(s); | |
cec736d2 LP |
637 | |
638 | return 0; | |
639 | } | |
640 | ||
de190aef | 641 | static int journal_file_setup_field_hash_table(JournalFile *f) { |
cec736d2 LP |
642 | uint64_t s, p; |
643 | Object *o; | |
644 | int r; | |
645 | ||
646 | assert(f); | |
647 | ||
3c1668da LP |
648 | /* We use a fixed size hash table for the fields as this |
649 | * number should grow very slowly only */ | |
650 | ||
de190aef LP |
651 | s = DEFAULT_FIELD_HASH_TABLE_SIZE; |
652 | r = journal_file_append_object(f, | |
653 | OBJECT_FIELD_HASH_TABLE, | |
654 | offsetof(Object, hash_table.items) + s, | |
655 | &o, &p); | |
cec736d2 LP |
656 | if (r < 0) |
657 | return r; | |
658 | ||
29804cc1 | 659 | memzero(o->hash_table.items, s); |
cec736d2 | 660 | |
de190aef LP |
661 | f->header->field_hash_table_offset = htole64(p + offsetof(Object, hash_table.items)); |
662 | f->header->field_hash_table_size = htole64(s); | |
cec736d2 LP |
663 | |
664 | return 0; | |
665 | } | |
666 | ||
dade37d4 | 667 | int journal_file_map_data_hash_table(JournalFile *f) { |
cec736d2 LP |
668 | uint64_t s, p; |
669 | void *t; | |
670 | int r; | |
671 | ||
672 | assert(f); | |
673 | ||
dade37d4 LP |
674 | if (f->data_hash_table) |
675 | return 0; | |
676 | ||
de190aef LP |
677 | p = le64toh(f->header->data_hash_table_offset); |
678 | s = le64toh(f->header->data_hash_table_size); | |
cec736d2 | 679 | |
de190aef | 680 | r = journal_file_move_to(f, |
16e9f408 | 681 | OBJECT_DATA_HASH_TABLE, |
fcde2389 | 682 | true, |
de190aef LP |
683 | p, s, |
684 | &t); | |
cec736d2 LP |
685 | if (r < 0) |
686 | return r; | |
687 | ||
de190aef | 688 | f->data_hash_table = t; |
cec736d2 LP |
689 | return 0; |
690 | } | |
691 | ||
dade37d4 | 692 | int journal_file_map_field_hash_table(JournalFile *f) { |
cec736d2 LP |
693 | uint64_t s, p; |
694 | void *t; | |
695 | int r; | |
696 | ||
697 | assert(f); | |
698 | ||
dade37d4 LP |
699 | if (f->field_hash_table) |
700 | return 0; | |
701 | ||
de190aef LP |
702 | p = le64toh(f->header->field_hash_table_offset); |
703 | s = le64toh(f->header->field_hash_table_size); | |
cec736d2 | 704 | |
de190aef | 705 | r = journal_file_move_to(f, |
16e9f408 | 706 | OBJECT_FIELD_HASH_TABLE, |
fcde2389 | 707 | true, |
de190aef LP |
708 | p, s, |
709 | &t); | |
cec736d2 LP |
710 | if (r < 0) |
711 | return r; | |
712 | ||
de190aef | 713 | f->field_hash_table = t; |
cec736d2 LP |
714 | return 0; |
715 | } | |
716 | ||
3c1668da LP |
717 | static int journal_file_link_field( |
718 | JournalFile *f, | |
719 | Object *o, | |
720 | uint64_t offset, | |
721 | uint64_t hash) { | |
722 | ||
805d1486 | 723 | uint64_t p, h, m; |
3c1668da LP |
724 | int r; |
725 | ||
726 | assert(f); | |
727 | assert(o); | |
728 | assert(offset > 0); | |
729 | ||
730 | if (o->object.type != OBJECT_FIELD) | |
731 | return -EINVAL; | |
732 | ||
805d1486 LP |
733 | m = le64toh(f->header->field_hash_table_size) / sizeof(HashItem); |
734 | if (m <= 0) | |
735 | return -EBADMSG; | |
3c1668da | 736 | |
805d1486 | 737 | /* This might alter the window we are looking at */ |
3c1668da LP |
738 | o->field.next_hash_offset = o->field.head_data_offset = 0; |
739 | ||
805d1486 | 740 | h = hash % m; |
3c1668da LP |
741 | p = le64toh(f->field_hash_table[h].tail_hash_offset); |
742 | if (p == 0) | |
743 | f->field_hash_table[h].head_hash_offset = htole64(offset); | |
744 | else { | |
745 | r = journal_file_move_to_object(f, OBJECT_FIELD, p, &o); | |
746 | if (r < 0) | |
747 | return r; | |
748 | ||
749 | o->field.next_hash_offset = htole64(offset); | |
750 | } | |
751 | ||
752 | f->field_hash_table[h].tail_hash_offset = htole64(offset); | |
753 | ||
754 | if (JOURNAL_HEADER_CONTAINS(f->header, n_fields)) | |
755 | f->header->n_fields = htole64(le64toh(f->header->n_fields) + 1); | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | static int journal_file_link_data( | |
761 | JournalFile *f, | |
762 | Object *o, | |
763 | uint64_t offset, | |
764 | uint64_t hash) { | |
765 | ||
805d1486 | 766 | uint64_t p, h, m; |
cec736d2 LP |
767 | int r; |
768 | ||
769 | assert(f); | |
770 | assert(o); | |
771 | assert(offset > 0); | |
b588975f LP |
772 | |
773 | if (o->object.type != OBJECT_DATA) | |
774 | return -EINVAL; | |
cec736d2 | 775 | |
805d1486 LP |
776 | m = le64toh(f->header->data_hash_table_size) / sizeof(HashItem); |
777 | if (m <= 0) | |
778 | return -EBADMSG; | |
48496df6 | 779 | |
805d1486 | 780 | /* This might alter the window we are looking at */ |
de190aef LP |
781 | o->data.next_hash_offset = o->data.next_field_offset = 0; |
782 | o->data.entry_offset = o->data.entry_array_offset = 0; | |
783 | o->data.n_entries = 0; | |
cec736d2 | 784 | |
805d1486 | 785 | h = hash % m; |
8db4213e | 786 | p = le64toh(f->data_hash_table[h].tail_hash_offset); |
3c1668da | 787 | if (p == 0) |
cec736d2 | 788 | /* Only entry in the hash table is easy */ |
de190aef | 789 | f->data_hash_table[h].head_hash_offset = htole64(offset); |
3c1668da | 790 | else { |
48496df6 LP |
791 | /* Move back to the previous data object, to patch in |
792 | * pointer */ | |
cec736d2 | 793 | |
de190aef | 794 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); |
cec736d2 LP |
795 | if (r < 0) |
796 | return r; | |
797 | ||
de190aef | 798 | o->data.next_hash_offset = htole64(offset); |
cec736d2 LP |
799 | } |
800 | ||
de190aef | 801 | f->data_hash_table[h].tail_hash_offset = htole64(offset); |
cec736d2 | 802 | |
dca6219e LP |
803 | if (JOURNAL_HEADER_CONTAINS(f->header, n_data)) |
804 | f->header->n_data = htole64(le64toh(f->header->n_data) + 1); | |
805 | ||
cec736d2 LP |
806 | return 0; |
807 | } | |
808 | ||
3c1668da LP |
809 | int journal_file_find_field_object_with_hash( |
810 | JournalFile *f, | |
811 | const void *field, uint64_t size, uint64_t hash, | |
812 | Object **ret, uint64_t *offset) { | |
813 | ||
805d1486 | 814 | uint64_t p, osize, h, m; |
3c1668da LP |
815 | int r; |
816 | ||
817 | assert(f); | |
818 | assert(field && size > 0); | |
819 | ||
dade37d4 LP |
820 | /* If the field hash table is empty, we can't find anything */ |
821 | if (le64toh(f->header->field_hash_table_size) <= 0) | |
822 | return 0; | |
823 | ||
824 | /* Map the field hash table, if it isn't mapped yet. */ | |
825 | r = journal_file_map_field_hash_table(f); | |
826 | if (r < 0) | |
827 | return r; | |
828 | ||
3c1668da LP |
829 | osize = offsetof(Object, field.payload) + size; |
830 | ||
805d1486 | 831 | m = le64toh(f->header->field_hash_table_size) / sizeof(HashItem); |
805d1486 | 832 | if (m <= 0) |
3c1668da LP |
833 | return -EBADMSG; |
834 | ||
805d1486 | 835 | h = hash % m; |
3c1668da LP |
836 | p = le64toh(f->field_hash_table[h].head_hash_offset); |
837 | ||
838 | while (p > 0) { | |
839 | Object *o; | |
840 | ||
841 | r = journal_file_move_to_object(f, OBJECT_FIELD, p, &o); | |
842 | if (r < 0) | |
843 | return r; | |
844 | ||
845 | if (le64toh(o->field.hash) == hash && | |
846 | le64toh(o->object.size) == osize && | |
847 | memcmp(o->field.payload, field, size) == 0) { | |
848 | ||
849 | if (ret) | |
850 | *ret = o; | |
851 | if (offset) | |
852 | *offset = p; | |
853 | ||
854 | return 1; | |
855 | } | |
856 | ||
857 | p = le64toh(o->field.next_hash_offset); | |
858 | } | |
859 | ||
860 | return 0; | |
861 | } | |
862 | ||
863 | int journal_file_find_field_object( | |
864 | JournalFile *f, | |
865 | const void *field, uint64_t size, | |
866 | Object **ret, uint64_t *offset) { | |
867 | ||
868 | uint64_t hash; | |
869 | ||
870 | assert(f); | |
871 | assert(field && size > 0); | |
872 | ||
873 | hash = hash64(field, size); | |
874 | ||
875 | return journal_file_find_field_object_with_hash(f, | |
876 | field, size, hash, | |
877 | ret, offset); | |
878 | } | |
879 | ||
de190aef LP |
880 | int journal_file_find_data_object_with_hash( |
881 | JournalFile *f, | |
882 | const void *data, uint64_t size, uint64_t hash, | |
883 | Object **ret, uint64_t *offset) { | |
48496df6 | 884 | |
805d1486 | 885 | uint64_t p, osize, h, m; |
cec736d2 LP |
886 | int r; |
887 | ||
888 | assert(f); | |
889 | assert(data || size == 0); | |
890 | ||
dade37d4 LP |
891 | /* If there's no data hash table, then there's no entry. */ |
892 | if (le64toh(f->header->data_hash_table_size) <= 0) | |
893 | return 0; | |
894 | ||
895 | /* Map the data hash table, if it isn't mapped yet. */ | |
896 | r = journal_file_map_data_hash_table(f); | |
897 | if (r < 0) | |
898 | return r; | |
899 | ||
cec736d2 LP |
900 | osize = offsetof(Object, data.payload) + size; |
901 | ||
805d1486 LP |
902 | m = le64toh(f->header->data_hash_table_size) / sizeof(HashItem); |
903 | if (m <= 0) | |
bc85bfee LP |
904 | return -EBADMSG; |
905 | ||
805d1486 | 906 | h = hash % m; |
de190aef | 907 | p = le64toh(f->data_hash_table[h].head_hash_offset); |
cec736d2 | 908 | |
de190aef LP |
909 | while (p > 0) { |
910 | Object *o; | |
cec736d2 | 911 | |
de190aef | 912 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); |
cec736d2 LP |
913 | if (r < 0) |
914 | return r; | |
915 | ||
807e17f0 | 916 | if (le64toh(o->data.hash) != hash) |
85a131e8 | 917 | goto next; |
807e17f0 | 918 | |
d89c8fdf | 919 | if (o->object.flags & OBJECT_COMPRESSION_MASK) { |
3b1a55e1 | 920 | #if defined(HAVE_XZ) || defined(HAVE_LZ4) |
fa1c4b51 | 921 | uint64_t l; |
a7f7d1bd | 922 | size_t rsize = 0; |
cec736d2 | 923 | |
807e17f0 LP |
924 | l = le64toh(o->object.size); |
925 | if (l <= offsetof(Object, data.payload)) | |
cec736d2 LP |
926 | return -EBADMSG; |
927 | ||
807e17f0 LP |
928 | l -= offsetof(Object, data.payload); |
929 | ||
d89c8fdf ZJS |
930 | r = decompress_blob(o->object.flags & OBJECT_COMPRESSION_MASK, |
931 | o->data.payload, l, &f->compress_buffer, &f->compress_buffer_size, &rsize, 0); | |
932 | if (r < 0) | |
933 | return r; | |
807e17f0 | 934 | |
b785c858 | 935 | if (rsize == size && |
807e17f0 LP |
936 | memcmp(f->compress_buffer, data, size) == 0) { |
937 | ||
938 | if (ret) | |
939 | *ret = o; | |
940 | ||
941 | if (offset) | |
942 | *offset = p; | |
943 | ||
944 | return 1; | |
945 | } | |
3b1a55e1 ZJS |
946 | #else |
947 | return -EPROTONOSUPPORT; | |
948 | #endif | |
807e17f0 LP |
949 | } else if (le64toh(o->object.size) == osize && |
950 | memcmp(o->data.payload, data, size) == 0) { | |
951 | ||
cec736d2 LP |
952 | if (ret) |
953 | *ret = o; | |
954 | ||
955 | if (offset) | |
956 | *offset = p; | |
957 | ||
de190aef | 958 | return 1; |
cec736d2 LP |
959 | } |
960 | ||
85a131e8 | 961 | next: |
cec736d2 LP |
962 | p = le64toh(o->data.next_hash_offset); |
963 | } | |
964 | ||
de190aef LP |
965 | return 0; |
966 | } | |
967 | ||
968 | int journal_file_find_data_object( | |
969 | JournalFile *f, | |
970 | const void *data, uint64_t size, | |
971 | Object **ret, uint64_t *offset) { | |
972 | ||
973 | uint64_t hash; | |
974 | ||
975 | assert(f); | |
976 | assert(data || size == 0); | |
977 | ||
978 | hash = hash64(data, size); | |
979 | ||
980 | return journal_file_find_data_object_with_hash(f, | |
981 | data, size, hash, | |
982 | ret, offset); | |
983 | } | |
984 | ||
3c1668da LP |
985 | static int journal_file_append_field( |
986 | JournalFile *f, | |
987 | const void *field, uint64_t size, | |
988 | Object **ret, uint64_t *offset) { | |
989 | ||
990 | uint64_t hash, p; | |
991 | uint64_t osize; | |
992 | Object *o; | |
993 | int r; | |
994 | ||
995 | assert(f); | |
996 | assert(field && size > 0); | |
997 | ||
998 | hash = hash64(field, size); | |
999 | ||
1000 | r = journal_file_find_field_object_with_hash(f, field, size, hash, &o, &p); | |
1001 | if (r < 0) | |
1002 | return r; | |
1003 | else if (r > 0) { | |
1004 | ||
1005 | if (ret) | |
1006 | *ret = o; | |
1007 | ||
1008 | if (offset) | |
1009 | *offset = p; | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | osize = offsetof(Object, field.payload) + size; | |
1015 | r = journal_file_append_object(f, OBJECT_FIELD, osize, &o, &p); | |
8c92d4bb LP |
1016 | if (r < 0) |
1017 | return r; | |
3c1668da LP |
1018 | |
1019 | o->field.hash = htole64(hash); | |
1020 | memcpy(o->field.payload, field, size); | |
1021 | ||
1022 | r = journal_file_link_field(f, o, p, hash); | |
1023 | if (r < 0) | |
1024 | return r; | |
1025 | ||
1026 | /* The linking might have altered the window, so let's | |
1027 | * refresh our pointer */ | |
1028 | r = journal_file_move_to_object(f, OBJECT_FIELD, p, &o); | |
1029 | if (r < 0) | |
1030 | return r; | |
1031 | ||
1032 | #ifdef HAVE_GCRYPT | |
1033 | r = journal_file_hmac_put_object(f, OBJECT_FIELD, o, p); | |
1034 | if (r < 0) | |
1035 | return r; | |
1036 | #endif | |
1037 | ||
1038 | if (ret) | |
1039 | *ret = o; | |
1040 | ||
1041 | if (offset) | |
1042 | *offset = p; | |
1043 | ||
1044 | return 0; | |
1045 | } | |
1046 | ||
48496df6 LP |
1047 | static int journal_file_append_data( |
1048 | JournalFile *f, | |
1049 | const void *data, uint64_t size, | |
1050 | Object **ret, uint64_t *offset) { | |
1051 | ||
de190aef LP |
1052 | uint64_t hash, p; |
1053 | uint64_t osize; | |
1054 | Object *o; | |
d89c8fdf | 1055 | int r, compression = 0; |
3c1668da | 1056 | const void *eq; |
de190aef LP |
1057 | |
1058 | assert(f); | |
1059 | assert(data || size == 0); | |
1060 | ||
1061 | hash = hash64(data, size); | |
1062 | ||
1063 | r = journal_file_find_data_object_with_hash(f, data, size, hash, &o, &p); | |
1064 | if (r < 0) | |
1065 | return r; | |
0240c603 | 1066 | if (r > 0) { |
de190aef LP |
1067 | |
1068 | if (ret) | |
1069 | *ret = o; | |
1070 | ||
1071 | if (offset) | |
1072 | *offset = p; | |
1073 | ||
1074 | return 0; | |
1075 | } | |
1076 | ||
1077 | osize = offsetof(Object, data.payload) + size; | |
1078 | r = journal_file_append_object(f, OBJECT_DATA, osize, &o, &p); | |
cec736d2 LP |
1079 | if (r < 0) |
1080 | return r; | |
1081 | ||
cec736d2 | 1082 | o->data.hash = htole64(hash); |
807e17f0 | 1083 | |
d89c8fdf | 1084 | #if defined(HAVE_XZ) || defined(HAVE_LZ4) |
d1afbcd2 | 1085 | if (JOURNAL_FILE_COMPRESS(f) && size >= COMPRESSION_SIZE_THRESHOLD) { |
a7f7d1bd | 1086 | size_t rsize = 0; |
807e17f0 | 1087 | |
d89c8fdf | 1088 | compression = compress_blob(data, size, o->data.payload, &rsize); |
807e17f0 | 1089 | |
d1afbcd2 | 1090 | if (compression >= 0) { |
807e17f0 | 1091 | o->object.size = htole64(offsetof(Object, data.payload) + rsize); |
d89c8fdf | 1092 | o->object.flags |= compression; |
807e17f0 | 1093 | |
fa1c4b51 | 1094 | log_debug("Compressed data object %"PRIu64" -> %zu using %s", |
d89c8fdf | 1095 | size, rsize, object_compressed_to_string(compression)); |
d1afbcd2 LP |
1096 | } else |
1097 | /* Compression didn't work, we don't really care why, let's continue without compression */ | |
1098 | compression = 0; | |
807e17f0 LP |
1099 | } |
1100 | #endif | |
1101 | ||
d1afbcd2 | 1102 | if (compression == 0 && size > 0) |
807e17f0 | 1103 | memcpy(o->data.payload, data, size); |
cec736d2 | 1104 | |
de190aef | 1105 | r = journal_file_link_data(f, o, p, hash); |
cec736d2 LP |
1106 | if (r < 0) |
1107 | return r; | |
1108 | ||
48496df6 LP |
1109 | /* The linking might have altered the window, so let's |
1110 | * refresh our pointer */ | |
1111 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
1112 | if (r < 0) | |
1113 | return r; | |
1114 | ||
08c6f819 SL |
1115 | if (!data) |
1116 | eq = NULL; | |
1117 | else | |
1118 | eq = memchr(data, '=', size); | |
3c1668da | 1119 | if (eq && eq > data) { |
748db592 | 1120 | Object *fo = NULL; |
3c1668da | 1121 | uint64_t fp; |
3c1668da LP |
1122 | |
1123 | /* Create field object ... */ | |
1124 | r = journal_file_append_field(f, data, (uint8_t*) eq - (uint8_t*) data, &fo, &fp); | |
1125 | if (r < 0) | |
1126 | return r; | |
1127 | ||
1128 | /* ... and link it in. */ | |
1129 | o->data.next_field_offset = fo->field.head_data_offset; | |
1130 | fo->field.head_data_offset = le64toh(p); | |
1131 | } | |
1132 | ||
5996c7c2 LP |
1133 | #ifdef HAVE_GCRYPT |
1134 | r = journal_file_hmac_put_object(f, OBJECT_DATA, o, p); | |
1135 | if (r < 0) | |
1136 | return r; | |
1137 | #endif | |
1138 | ||
cec736d2 LP |
1139 | if (ret) |
1140 | *ret = o; | |
1141 | ||
1142 | if (offset) | |
de190aef | 1143 | *offset = p; |
cec736d2 LP |
1144 | |
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | uint64_t journal_file_entry_n_items(Object *o) { | |
1149 | assert(o); | |
b588975f LP |
1150 | |
1151 | if (o->object.type != OBJECT_ENTRY) | |
1152 | return 0; | |
cec736d2 LP |
1153 | |
1154 | return (le64toh(o->object.size) - offsetof(Object, entry.items)) / sizeof(EntryItem); | |
1155 | } | |
1156 | ||
0284adc6 | 1157 | uint64_t journal_file_entry_array_n_items(Object *o) { |
de190aef | 1158 | assert(o); |
b588975f LP |
1159 | |
1160 | if (o->object.type != OBJECT_ENTRY_ARRAY) | |
1161 | return 0; | |
de190aef LP |
1162 | |
1163 | return (le64toh(o->object.size) - offsetof(Object, entry_array.items)) / sizeof(uint64_t); | |
1164 | } | |
1165 | ||
fb9a24b6 LP |
1166 | uint64_t journal_file_hash_table_n_items(Object *o) { |
1167 | assert(o); | |
b588975f LP |
1168 | |
1169 | if (o->object.type != OBJECT_DATA_HASH_TABLE && | |
1170 | o->object.type != OBJECT_FIELD_HASH_TABLE) | |
1171 | return 0; | |
fb9a24b6 LP |
1172 | |
1173 | return (le64toh(o->object.size) - offsetof(Object, hash_table.items)) / sizeof(HashItem); | |
1174 | } | |
1175 | ||
de190aef | 1176 | static int link_entry_into_array(JournalFile *f, |
4fd052ae FC |
1177 | le64_t *first, |
1178 | le64_t *idx, | |
de190aef | 1179 | uint64_t p) { |
cec736d2 | 1180 | int r; |
de190aef LP |
1181 | uint64_t n = 0, ap = 0, q, i, a, hidx; |
1182 | Object *o; | |
1183 | ||
cec736d2 | 1184 | assert(f); |
de190aef LP |
1185 | assert(first); |
1186 | assert(idx); | |
1187 | assert(p > 0); | |
cec736d2 | 1188 | |
de190aef LP |
1189 | a = le64toh(*first); |
1190 | i = hidx = le64toh(*idx); | |
1191 | while (a > 0) { | |
1192 | ||
1193 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o); | |
1194 | if (r < 0) | |
1195 | return r; | |
cec736d2 | 1196 | |
de190aef LP |
1197 | n = journal_file_entry_array_n_items(o); |
1198 | if (i < n) { | |
1199 | o->entry_array.items[i] = htole64(p); | |
1200 | *idx = htole64(hidx + 1); | |
1201 | return 0; | |
1202 | } | |
cec736d2 | 1203 | |
de190aef LP |
1204 | i -= n; |
1205 | ap = a; | |
1206 | a = le64toh(o->entry_array.next_entry_array_offset); | |
1207 | } | |
1208 | ||
1209 | if (hidx > n) | |
1210 | n = (hidx+1) * 2; | |
1211 | else | |
1212 | n = n * 2; | |
1213 | ||
1214 | if (n < 4) | |
1215 | n = 4; | |
1216 | ||
1217 | r = journal_file_append_object(f, OBJECT_ENTRY_ARRAY, | |
1218 | offsetof(Object, entry_array.items) + n * sizeof(uint64_t), | |
1219 | &o, &q); | |
cec736d2 LP |
1220 | if (r < 0) |
1221 | return r; | |
1222 | ||
feb12d3e | 1223 | #ifdef HAVE_GCRYPT |
5996c7c2 | 1224 | r = journal_file_hmac_put_object(f, OBJECT_ENTRY_ARRAY, o, q); |
b0af6f41 LP |
1225 | if (r < 0) |
1226 | return r; | |
feb12d3e | 1227 | #endif |
b0af6f41 | 1228 | |
de190aef | 1229 | o->entry_array.items[i] = htole64(p); |
cec736d2 | 1230 | |
de190aef | 1231 | if (ap == 0) |
7be3aa17 | 1232 | *first = htole64(q); |
cec736d2 | 1233 | else { |
de190aef | 1234 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, ap, &o); |
cec736d2 LP |
1235 | if (r < 0) |
1236 | return r; | |
1237 | ||
de190aef LP |
1238 | o->entry_array.next_entry_array_offset = htole64(q); |
1239 | } | |
cec736d2 | 1240 | |
2dee23eb LP |
1241 | if (JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays)) |
1242 | f->header->n_entry_arrays = htole64(le64toh(f->header->n_entry_arrays) + 1); | |
1243 | ||
de190aef LP |
1244 | *idx = htole64(hidx + 1); |
1245 | ||
1246 | return 0; | |
1247 | } | |
cec736d2 | 1248 | |
de190aef | 1249 | static int link_entry_into_array_plus_one(JournalFile *f, |
4fd052ae FC |
1250 | le64_t *extra, |
1251 | le64_t *first, | |
1252 | le64_t *idx, | |
de190aef LP |
1253 | uint64_t p) { |
1254 | ||
1255 | int r; | |
1256 | ||
1257 | assert(f); | |
1258 | assert(extra); | |
1259 | assert(first); | |
1260 | assert(idx); | |
1261 | assert(p > 0); | |
1262 | ||
1263 | if (*idx == 0) | |
1264 | *extra = htole64(p); | |
1265 | else { | |
4fd052ae | 1266 | le64_t i; |
de190aef | 1267 | |
7be3aa17 | 1268 | i = htole64(le64toh(*idx) - 1); |
de190aef LP |
1269 | r = link_entry_into_array(f, first, &i, p); |
1270 | if (r < 0) | |
1271 | return r; | |
cec736d2 LP |
1272 | } |
1273 | ||
de190aef LP |
1274 | *idx = htole64(le64toh(*idx) + 1); |
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | static int journal_file_link_entry_item(JournalFile *f, Object *o, uint64_t offset, uint64_t i) { | |
1279 | uint64_t p; | |
1280 | int r; | |
1281 | assert(f); | |
1282 | assert(o); | |
1283 | assert(offset > 0); | |
1284 | ||
1285 | p = le64toh(o->entry.items[i].object_offset); | |
1286 | if (p == 0) | |
1287 | return -EINVAL; | |
1288 | ||
1289 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
cec736d2 LP |
1290 | if (r < 0) |
1291 | return r; | |
1292 | ||
de190aef LP |
1293 | return link_entry_into_array_plus_one(f, |
1294 | &o->data.entry_offset, | |
1295 | &o->data.entry_array_offset, | |
1296 | &o->data.n_entries, | |
1297 | offset); | |
cec736d2 LP |
1298 | } |
1299 | ||
1300 | static int journal_file_link_entry(JournalFile *f, Object *o, uint64_t offset) { | |
de190aef | 1301 | uint64_t n, i; |
cec736d2 LP |
1302 | int r; |
1303 | ||
1304 | assert(f); | |
1305 | assert(o); | |
1306 | assert(offset > 0); | |
b588975f LP |
1307 | |
1308 | if (o->object.type != OBJECT_ENTRY) | |
1309 | return -EINVAL; | |
cec736d2 | 1310 | |
b788cc23 LP |
1311 | __sync_synchronize(); |
1312 | ||
cec736d2 | 1313 | /* Link up the entry itself */ |
de190aef LP |
1314 | r = link_entry_into_array(f, |
1315 | &f->header->entry_array_offset, | |
1316 | &f->header->n_entries, | |
1317 | offset); | |
1318 | if (r < 0) | |
1319 | return r; | |
cec736d2 | 1320 | |
507f22bd | 1321 | /* log_debug("=> %s seqnr=%"PRIu64" n_entries=%"PRIu64, f->path, o->entry.seqnum, f->header->n_entries); */ |
cec736d2 | 1322 | |
de190aef | 1323 | if (f->header->head_entry_realtime == 0) |
0ac38b70 | 1324 | f->header->head_entry_realtime = o->entry.realtime; |
cec736d2 | 1325 | |
0ac38b70 | 1326 | f->header->tail_entry_realtime = o->entry.realtime; |
de190aef LP |
1327 | f->header->tail_entry_monotonic = o->entry.monotonic; |
1328 | ||
1329 | f->tail_entry_monotonic_valid = true; | |
cec736d2 LP |
1330 | |
1331 | /* Link up the items */ | |
1332 | n = journal_file_entry_n_items(o); | |
1333 | for (i = 0; i < n; i++) { | |
1334 | r = journal_file_link_entry_item(f, o, offset, i); | |
1335 | if (r < 0) | |
1336 | return r; | |
1337 | } | |
1338 | ||
cec736d2 LP |
1339 | return 0; |
1340 | } | |
1341 | ||
1342 | static int journal_file_append_entry_internal( | |
1343 | JournalFile *f, | |
1344 | const dual_timestamp *ts, | |
1345 | uint64_t xor_hash, | |
1346 | const EntryItem items[], unsigned n_items, | |
de190aef | 1347 | uint64_t *seqnum, |
cec736d2 LP |
1348 | Object **ret, uint64_t *offset) { |
1349 | uint64_t np; | |
1350 | uint64_t osize; | |
1351 | Object *o; | |
1352 | int r; | |
1353 | ||
1354 | assert(f); | |
1355 | assert(items || n_items == 0); | |
de190aef | 1356 | assert(ts); |
cec736d2 LP |
1357 | |
1358 | osize = offsetof(Object, entry.items) + (n_items * sizeof(EntryItem)); | |
1359 | ||
de190aef | 1360 | r = journal_file_append_object(f, OBJECT_ENTRY, osize, &o, &np); |
cec736d2 LP |
1361 | if (r < 0) |
1362 | return r; | |
1363 | ||
d98cc1f2 | 1364 | o->entry.seqnum = htole64(journal_file_entry_seqnum(f, seqnum)); |
cec736d2 | 1365 | memcpy(o->entry.items, items, n_items * sizeof(EntryItem)); |
de190aef LP |
1366 | o->entry.realtime = htole64(ts->realtime); |
1367 | o->entry.monotonic = htole64(ts->monotonic); | |
cec736d2 LP |
1368 | o->entry.xor_hash = htole64(xor_hash); |
1369 | o->entry.boot_id = f->header->boot_id; | |
1370 | ||
feb12d3e | 1371 | #ifdef HAVE_GCRYPT |
5996c7c2 | 1372 | r = journal_file_hmac_put_object(f, OBJECT_ENTRY, o, np); |
b0af6f41 LP |
1373 | if (r < 0) |
1374 | return r; | |
feb12d3e | 1375 | #endif |
b0af6f41 | 1376 | |
cec736d2 LP |
1377 | r = journal_file_link_entry(f, o, np); |
1378 | if (r < 0) | |
1379 | return r; | |
1380 | ||
1381 | if (ret) | |
1382 | *ret = o; | |
1383 | ||
1384 | if (offset) | |
1385 | *offset = np; | |
1386 | ||
1387 | return 0; | |
1388 | } | |
1389 | ||
cf244689 | 1390 | void journal_file_post_change(JournalFile *f) { |
50f20cfd LP |
1391 | assert(f); |
1392 | ||
1393 | /* inotify() does not receive IN_MODIFY events from file | |
1394 | * accesses done via mmap(). After each access we hence | |
1395 | * trigger IN_MODIFY by truncating the journal file to its | |
1396 | * current size which triggers IN_MODIFY. */ | |
1397 | ||
bc85bfee LP |
1398 | __sync_synchronize(); |
1399 | ||
50f20cfd | 1400 | if (ftruncate(f->fd, f->last_stat.st_size) < 0) |
56f64d95 | 1401 | log_error_errno(errno, "Failed to truncate file to its own size: %m"); |
50f20cfd LP |
1402 | } |
1403 | ||
1f2da9ec LP |
1404 | static int entry_item_cmp(const void *_a, const void *_b) { |
1405 | const EntryItem *a = _a, *b = _b; | |
1406 | ||
1407 | if (le64toh(a->object_offset) < le64toh(b->object_offset)) | |
1408 | return -1; | |
1409 | if (le64toh(a->object_offset) > le64toh(b->object_offset)) | |
1410 | return 1; | |
1411 | return 0; | |
1412 | } | |
1413 | ||
de190aef | 1414 | 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 |
1415 | unsigned i; |
1416 | EntryItem *items; | |
1417 | int r; | |
1418 | uint64_t xor_hash = 0; | |
de190aef | 1419 | struct dual_timestamp _ts; |
cec736d2 LP |
1420 | |
1421 | assert(f); | |
1422 | assert(iovec || n_iovec == 0); | |
1423 | ||
de190aef LP |
1424 | if (!ts) { |
1425 | dual_timestamp_get(&_ts); | |
1426 | ts = &_ts; | |
1427 | } | |
1428 | ||
1429 | if (f->tail_entry_monotonic_valid && | |
1430 | ts->monotonic < le64toh(f->header->tail_entry_monotonic)) | |
1431 | return -EINVAL; | |
1432 | ||
feb12d3e | 1433 | #ifdef HAVE_GCRYPT |
7560fffc LP |
1434 | r = journal_file_maybe_append_tag(f, ts->realtime); |
1435 | if (r < 0) | |
1436 | return r; | |
feb12d3e | 1437 | #endif |
7560fffc | 1438 | |
64825d3c | 1439 | /* alloca() can't take 0, hence let's allocate at least one */ |
9607d947 | 1440 | items = alloca(sizeof(EntryItem) * MAX(1u, n_iovec)); |
cec736d2 LP |
1441 | |
1442 | for (i = 0; i < n_iovec; i++) { | |
1443 | uint64_t p; | |
1444 | Object *o; | |
1445 | ||
1446 | r = journal_file_append_data(f, iovec[i].iov_base, iovec[i].iov_len, &o, &p); | |
1447 | if (r < 0) | |
cf244689 | 1448 | return r; |
cec736d2 LP |
1449 | |
1450 | xor_hash ^= le64toh(o->data.hash); | |
1451 | items[i].object_offset = htole64(p); | |
de7b95cd | 1452 | items[i].hash = o->data.hash; |
cec736d2 LP |
1453 | } |
1454 | ||
1f2da9ec LP |
1455 | /* Order by the position on disk, in order to improve seek |
1456 | * times for rotating media. */ | |
7ff7394d | 1457 | qsort_safe(items, n_iovec, sizeof(EntryItem), entry_item_cmp); |
1f2da9ec | 1458 | |
de190aef | 1459 | r = journal_file_append_entry_internal(f, ts, xor_hash, items, n_iovec, seqnum, ret, offset); |
cec736d2 | 1460 | |
fa6ac760 LP |
1461 | /* If the memory mapping triggered a SIGBUS then we return an |
1462 | * IO error and ignore the error code passed down to us, since | |
1463 | * it is very likely just an effect of a nullified replacement | |
1464 | * mapping page */ | |
1465 | ||
1466 | if (mmap_cache_got_sigbus(f->mmap, f->fd)) | |
1467 | r = -EIO; | |
1468 | ||
50f20cfd LP |
1469 | journal_file_post_change(f); |
1470 | ||
cec736d2 LP |
1471 | return r; |
1472 | } | |
1473 | ||
a4bcff5b | 1474 | typedef struct ChainCacheItem { |
fb099c8d | 1475 | uint64_t first; /* the array at the beginning of the chain */ |
a4bcff5b LP |
1476 | uint64_t array; /* the cached array */ |
1477 | uint64_t begin; /* the first item in the cached array */ | |
1478 | uint64_t total; /* the total number of items in all arrays before this one in the chain */ | |
f268980d | 1479 | uint64_t last_index; /* the last index we looked at, to optimize locality when bisecting */ |
a4bcff5b LP |
1480 | } ChainCacheItem; |
1481 | ||
1482 | static void chain_cache_put( | |
4743015d | 1483 | OrderedHashmap *h, |
a4bcff5b LP |
1484 | ChainCacheItem *ci, |
1485 | uint64_t first, | |
1486 | uint64_t array, | |
1487 | uint64_t begin, | |
f268980d LP |
1488 | uint64_t total, |
1489 | uint64_t last_index) { | |
a4bcff5b LP |
1490 | |
1491 | if (!ci) { | |
34741aa3 LP |
1492 | /* If the chain item to cache for this chain is the |
1493 | * first one it's not worth caching anything */ | |
1494 | if (array == first) | |
1495 | return; | |
1496 | ||
29433089 | 1497 | if (ordered_hashmap_size(h) >= CHAIN_CACHE_MAX) { |
4743015d | 1498 | ci = ordered_hashmap_steal_first(h); |
29433089 LP |
1499 | assert(ci); |
1500 | } else { | |
a4bcff5b LP |
1501 | ci = new(ChainCacheItem, 1); |
1502 | if (!ci) | |
1503 | return; | |
1504 | } | |
1505 | ||
1506 | ci->first = first; | |
1507 | ||
4743015d | 1508 | if (ordered_hashmap_put(h, &ci->first, ci) < 0) { |
a4bcff5b LP |
1509 | free(ci); |
1510 | return; | |
1511 | } | |
1512 | } else | |
1513 | assert(ci->first == first); | |
1514 | ||
1515 | ci->array = array; | |
1516 | ci->begin = begin; | |
1517 | ci->total = total; | |
f268980d | 1518 | ci->last_index = last_index; |
a4bcff5b LP |
1519 | } |
1520 | ||
f268980d LP |
1521 | static int generic_array_get( |
1522 | JournalFile *f, | |
1523 | uint64_t first, | |
1524 | uint64_t i, | |
1525 | Object **ret, uint64_t *offset) { | |
de190aef | 1526 | |
cec736d2 | 1527 | Object *o; |
a4bcff5b | 1528 | uint64_t p = 0, a, t = 0; |
cec736d2 | 1529 | int r; |
a4bcff5b | 1530 | ChainCacheItem *ci; |
cec736d2 LP |
1531 | |
1532 | assert(f); | |
1533 | ||
de190aef | 1534 | a = first; |
a4bcff5b LP |
1535 | |
1536 | /* Try the chain cache first */ | |
4743015d | 1537 | ci = ordered_hashmap_get(f->chain_cache, &first); |
a4bcff5b LP |
1538 | if (ci && i > ci->total) { |
1539 | a = ci->array; | |
1540 | i -= ci->total; | |
1541 | t = ci->total; | |
1542 | } | |
1543 | ||
de190aef | 1544 | while (a > 0) { |
a4bcff5b | 1545 | uint64_t k; |
cec736d2 | 1546 | |
de190aef LP |
1547 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &o); |
1548 | if (r < 0) | |
1549 | return r; | |
cec736d2 | 1550 | |
a4bcff5b LP |
1551 | k = journal_file_entry_array_n_items(o); |
1552 | if (i < k) { | |
de190aef | 1553 | p = le64toh(o->entry_array.items[i]); |
a4bcff5b | 1554 | goto found; |
cec736d2 LP |
1555 | } |
1556 | ||
a4bcff5b LP |
1557 | i -= k; |
1558 | t += k; | |
de190aef LP |
1559 | a = le64toh(o->entry_array.next_entry_array_offset); |
1560 | } | |
1561 | ||
a4bcff5b LP |
1562 | return 0; |
1563 | ||
1564 | found: | |
1565 | /* Let's cache this item for the next invocation */ | |
af13a6b0 | 1566 | chain_cache_put(f->chain_cache, ci, first, a, le64toh(o->entry_array.items[0]), t, i); |
de190aef LP |
1567 | |
1568 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1569 | if (r < 0) | |
1570 | return r; | |
1571 | ||
1572 | if (ret) | |
1573 | *ret = o; | |
1574 | ||
1575 | if (offset) | |
1576 | *offset = p; | |
1577 | ||
1578 | return 1; | |
1579 | } | |
1580 | ||
f268980d LP |
1581 | static int generic_array_get_plus_one( |
1582 | JournalFile *f, | |
1583 | uint64_t extra, | |
1584 | uint64_t first, | |
1585 | uint64_t i, | |
1586 | Object **ret, uint64_t *offset) { | |
de190aef LP |
1587 | |
1588 | Object *o; | |
1589 | ||
1590 | assert(f); | |
1591 | ||
1592 | if (i == 0) { | |
1593 | int r; | |
1594 | ||
1595 | r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o); | |
cec736d2 LP |
1596 | if (r < 0) |
1597 | return r; | |
1598 | ||
de190aef LP |
1599 | if (ret) |
1600 | *ret = o; | |
cec736d2 | 1601 | |
de190aef LP |
1602 | if (offset) |
1603 | *offset = extra; | |
cec736d2 | 1604 | |
de190aef | 1605 | return 1; |
cec736d2 LP |
1606 | } |
1607 | ||
de190aef LP |
1608 | return generic_array_get(f, first, i-1, ret, offset); |
1609 | } | |
cec736d2 | 1610 | |
de190aef LP |
1611 | enum { |
1612 | TEST_FOUND, | |
1613 | TEST_LEFT, | |
1614 | TEST_RIGHT | |
1615 | }; | |
cec736d2 | 1616 | |
f268980d LP |
1617 | static int generic_array_bisect( |
1618 | JournalFile *f, | |
1619 | uint64_t first, | |
1620 | uint64_t n, | |
1621 | uint64_t needle, | |
1622 | int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle), | |
1623 | direction_t direction, | |
1624 | Object **ret, | |
1625 | uint64_t *offset, | |
1626 | uint64_t *idx) { | |
1627 | ||
1628 | uint64_t a, p, t = 0, i = 0, last_p = 0, last_index = (uint64_t) -1; | |
de190aef LP |
1629 | bool subtract_one = false; |
1630 | Object *o, *array = NULL; | |
1631 | int r; | |
a4bcff5b | 1632 | ChainCacheItem *ci; |
cec736d2 | 1633 | |
de190aef LP |
1634 | assert(f); |
1635 | assert(test_object); | |
cec736d2 | 1636 | |
a4bcff5b | 1637 | /* Start with the first array in the chain */ |
de190aef | 1638 | a = first; |
a4bcff5b | 1639 | |
4743015d | 1640 | ci = ordered_hashmap_get(f->chain_cache, &first); |
a4bcff5b LP |
1641 | if (ci && n > ci->total) { |
1642 | /* Ah, we have iterated this bisection array chain | |
1643 | * previously! Let's see if we can skip ahead in the | |
1644 | * chain, as far as the last time. But we can't jump | |
1645 | * backwards in the chain, so let's check that | |
1646 | * first. */ | |
1647 | ||
1648 | r = test_object(f, ci->begin, needle); | |
1649 | if (r < 0) | |
1650 | return r; | |
1651 | ||
1652 | if (r == TEST_LEFT) { | |
f268980d | 1653 | /* OK, what we are looking for is right of the |
a4bcff5b LP |
1654 | * begin of this EntryArray, so let's jump |
1655 | * straight to previously cached array in the | |
1656 | * chain */ | |
1657 | ||
1658 | a = ci->array; | |
1659 | n -= ci->total; | |
1660 | t = ci->total; | |
f268980d | 1661 | last_index = ci->last_index; |
a4bcff5b LP |
1662 | } |
1663 | } | |
1664 | ||
de190aef LP |
1665 | while (a > 0) { |
1666 | uint64_t left, right, k, lp; | |
1667 | ||
1668 | r = journal_file_move_to_object(f, OBJECT_ENTRY_ARRAY, a, &array); | |
cec736d2 LP |
1669 | if (r < 0) |
1670 | return r; | |
1671 | ||
de190aef LP |
1672 | k = journal_file_entry_array_n_items(array); |
1673 | right = MIN(k, n); | |
1674 | if (right <= 0) | |
1675 | return 0; | |
cec736d2 | 1676 | |
de190aef LP |
1677 | i = right - 1; |
1678 | lp = p = le64toh(array->entry_array.items[i]); | |
1679 | if (p <= 0) | |
1680 | return -EBADMSG; | |
cec736d2 | 1681 | |
de190aef LP |
1682 | r = test_object(f, p, needle); |
1683 | if (r < 0) | |
1684 | return r; | |
cec736d2 | 1685 | |
de190aef LP |
1686 | if (r == TEST_FOUND) |
1687 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1688 | ||
1689 | if (r == TEST_RIGHT) { | |
1690 | left = 0; | |
1691 | right -= 1; | |
f268980d LP |
1692 | |
1693 | if (last_index != (uint64_t) -1) { | |
1694 | assert(last_index <= right); | |
1695 | ||
1696 | /* If we cached the last index we | |
1697 | * looked at, let's try to not to jump | |
1698 | * too wildly around and see if we can | |
1699 | * limit the range to look at early to | |
1700 | * the immediate neighbors of the last | |
1701 | * index we looked at. */ | |
1702 | ||
1703 | if (last_index > 0) { | |
1704 | uint64_t x = last_index - 1; | |
1705 | ||
1706 | p = le64toh(array->entry_array.items[x]); | |
1707 | if (p <= 0) | |
1708 | return -EBADMSG; | |
1709 | ||
1710 | r = test_object(f, p, needle); | |
1711 | if (r < 0) | |
1712 | return r; | |
1713 | ||
1714 | if (r == TEST_FOUND) | |
1715 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1716 | ||
1717 | if (r == TEST_RIGHT) | |
1718 | right = x; | |
1719 | else | |
1720 | left = x + 1; | |
1721 | } | |
1722 | ||
1723 | if (last_index < right) { | |
1724 | uint64_t y = last_index + 1; | |
1725 | ||
1726 | p = le64toh(array->entry_array.items[y]); | |
1727 | if (p <= 0) | |
1728 | return -EBADMSG; | |
1729 | ||
1730 | r = test_object(f, p, needle); | |
1731 | if (r < 0) | |
1732 | return r; | |
1733 | ||
1734 | if (r == TEST_FOUND) | |
1735 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1736 | ||
1737 | if (r == TEST_RIGHT) | |
1738 | right = y; | |
1739 | else | |
1740 | left = y + 1; | |
1741 | } | |
f268980d LP |
1742 | } |
1743 | ||
de190aef LP |
1744 | for (;;) { |
1745 | if (left == right) { | |
1746 | if (direction == DIRECTION_UP) | |
1747 | subtract_one = true; | |
1748 | ||
1749 | i = left; | |
1750 | goto found; | |
1751 | } | |
1752 | ||
1753 | assert(left < right); | |
de190aef | 1754 | i = (left + right) / 2; |
f268980d | 1755 | |
de190aef LP |
1756 | p = le64toh(array->entry_array.items[i]); |
1757 | if (p <= 0) | |
1758 | return -EBADMSG; | |
1759 | ||
1760 | r = test_object(f, p, needle); | |
1761 | if (r < 0) | |
1762 | return r; | |
cec736d2 | 1763 | |
de190aef LP |
1764 | if (r == TEST_FOUND) |
1765 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1766 | ||
1767 | if (r == TEST_RIGHT) | |
1768 | right = i; | |
1769 | else | |
1770 | left = i + 1; | |
1771 | } | |
1772 | } | |
1773 | ||
2173cbf8 | 1774 | if (k >= n) { |
cbdca852 LP |
1775 | if (direction == DIRECTION_UP) { |
1776 | i = n; | |
1777 | subtract_one = true; | |
1778 | goto found; | |
1779 | } | |
1780 | ||
cec736d2 | 1781 | return 0; |
cbdca852 | 1782 | } |
cec736d2 | 1783 | |
de190aef LP |
1784 | last_p = lp; |
1785 | ||
1786 | n -= k; | |
1787 | t += k; | |
f268980d | 1788 | last_index = (uint64_t) -1; |
de190aef | 1789 | a = le64toh(array->entry_array.next_entry_array_offset); |
cec736d2 LP |
1790 | } |
1791 | ||
1792 | return 0; | |
de190aef LP |
1793 | |
1794 | found: | |
1795 | if (subtract_one && t == 0 && i == 0) | |
1796 | return 0; | |
1797 | ||
a4bcff5b | 1798 | /* Let's cache this item for the next invocation */ |
af13a6b0 | 1799 | chain_cache_put(f->chain_cache, ci, first, a, le64toh(array->entry_array.items[0]), t, subtract_one ? (i > 0 ? i-1 : (uint64_t) -1) : i); |
a4bcff5b | 1800 | |
de190aef LP |
1801 | if (subtract_one && i == 0) |
1802 | p = last_p; | |
1803 | else if (subtract_one) | |
1804 | p = le64toh(array->entry_array.items[i-1]); | |
1805 | else | |
1806 | p = le64toh(array->entry_array.items[i]); | |
1807 | ||
1808 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1809 | if (r < 0) | |
1810 | return r; | |
1811 | ||
1812 | if (ret) | |
1813 | *ret = o; | |
1814 | ||
1815 | if (offset) | |
1816 | *offset = p; | |
1817 | ||
1818 | if (idx) | |
cbdca852 | 1819 | *idx = t + i + (subtract_one ? -1 : 0); |
de190aef LP |
1820 | |
1821 | return 1; | |
cec736d2 LP |
1822 | } |
1823 | ||
f268980d LP |
1824 | static int generic_array_bisect_plus_one( |
1825 | JournalFile *f, | |
1826 | uint64_t extra, | |
1827 | uint64_t first, | |
1828 | uint64_t n, | |
1829 | uint64_t needle, | |
1830 | int (*test_object)(JournalFile *f, uint64_t p, uint64_t needle), | |
1831 | direction_t direction, | |
1832 | Object **ret, | |
1833 | uint64_t *offset, | |
1834 | uint64_t *idx) { | |
de190aef | 1835 | |
cec736d2 | 1836 | int r; |
cbdca852 LP |
1837 | bool step_back = false; |
1838 | Object *o; | |
cec736d2 LP |
1839 | |
1840 | assert(f); | |
de190aef | 1841 | assert(test_object); |
cec736d2 | 1842 | |
de190aef LP |
1843 | if (n <= 0) |
1844 | return 0; | |
cec736d2 | 1845 | |
de190aef LP |
1846 | /* This bisects the array in object 'first', but first checks |
1847 | * an extra */ | |
de190aef LP |
1848 | r = test_object(f, extra, needle); |
1849 | if (r < 0) | |
1850 | return r; | |
a536e261 LP |
1851 | |
1852 | if (r == TEST_FOUND) | |
1853 | r = direction == DIRECTION_DOWN ? TEST_RIGHT : TEST_LEFT; | |
1854 | ||
cbdca852 LP |
1855 | /* if we are looking with DIRECTION_UP then we need to first |
1856 | see if in the actual array there is a matching entry, and | |
1857 | return the last one of that. But if there isn't any we need | |
1858 | to return this one. Hence remember this, and return it | |
1859 | below. */ | |
1860 | if (r == TEST_LEFT) | |
1861 | step_back = direction == DIRECTION_UP; | |
de190aef | 1862 | |
cbdca852 LP |
1863 | if (r == TEST_RIGHT) { |
1864 | if (direction == DIRECTION_DOWN) | |
1865 | goto found; | |
1866 | else | |
1867 | return 0; | |
a536e261 | 1868 | } |
cec736d2 | 1869 | |
de190aef LP |
1870 | r = generic_array_bisect(f, first, n-1, needle, test_object, direction, ret, offset, idx); |
1871 | ||
cbdca852 LP |
1872 | if (r == 0 && step_back) |
1873 | goto found; | |
1874 | ||
ecf68b1d | 1875 | if (r > 0 && idx) |
de190aef LP |
1876 | (*idx) ++; |
1877 | ||
1878 | return r; | |
cbdca852 LP |
1879 | |
1880 | found: | |
1881 | r = journal_file_move_to_object(f, OBJECT_ENTRY, extra, &o); | |
1882 | if (r < 0) | |
1883 | return r; | |
1884 | ||
1885 | if (ret) | |
1886 | *ret = o; | |
1887 | ||
1888 | if (offset) | |
1889 | *offset = extra; | |
1890 | ||
1891 | if (idx) | |
1892 | *idx = 0; | |
1893 | ||
1894 | return 1; | |
1895 | } | |
1896 | ||
44a6b1b6 | 1897 | _pure_ static int test_object_offset(JournalFile *f, uint64_t p, uint64_t needle) { |
cbdca852 LP |
1898 | assert(f); |
1899 | assert(p > 0); | |
1900 | ||
1901 | if (p == needle) | |
1902 | return TEST_FOUND; | |
1903 | else if (p < needle) | |
1904 | return TEST_LEFT; | |
1905 | else | |
1906 | return TEST_RIGHT; | |
1907 | } | |
1908 | ||
de190aef LP |
1909 | static int test_object_seqnum(JournalFile *f, uint64_t p, uint64_t needle) { |
1910 | Object *o; | |
1911 | int r; | |
1912 | ||
1913 | assert(f); | |
1914 | assert(p > 0); | |
1915 | ||
1916 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
cec736d2 LP |
1917 | if (r < 0) |
1918 | return r; | |
1919 | ||
de190aef LP |
1920 | if (le64toh(o->entry.seqnum) == needle) |
1921 | return TEST_FOUND; | |
1922 | else if (le64toh(o->entry.seqnum) < needle) | |
1923 | return TEST_LEFT; | |
1924 | else | |
1925 | return TEST_RIGHT; | |
1926 | } | |
cec736d2 | 1927 | |
de190aef LP |
1928 | int journal_file_move_to_entry_by_seqnum( |
1929 | JournalFile *f, | |
1930 | uint64_t seqnum, | |
1931 | direction_t direction, | |
1932 | Object **ret, | |
1933 | uint64_t *offset) { | |
1934 | ||
1935 | return generic_array_bisect(f, | |
1936 | le64toh(f->header->entry_array_offset), | |
1937 | le64toh(f->header->n_entries), | |
1938 | seqnum, | |
1939 | test_object_seqnum, | |
1940 | direction, | |
1941 | ret, offset, NULL); | |
1942 | } | |
cec736d2 | 1943 | |
de190aef LP |
1944 | static int test_object_realtime(JournalFile *f, uint64_t p, uint64_t needle) { |
1945 | Object *o; | |
1946 | int r; | |
1947 | ||
1948 | assert(f); | |
1949 | assert(p > 0); | |
1950 | ||
1951 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1952 | if (r < 0) | |
1953 | return r; | |
1954 | ||
1955 | if (le64toh(o->entry.realtime) == needle) | |
1956 | return TEST_FOUND; | |
1957 | else if (le64toh(o->entry.realtime) < needle) | |
1958 | return TEST_LEFT; | |
1959 | else | |
1960 | return TEST_RIGHT; | |
cec736d2 LP |
1961 | } |
1962 | ||
de190aef LP |
1963 | int journal_file_move_to_entry_by_realtime( |
1964 | JournalFile *f, | |
1965 | uint64_t realtime, | |
1966 | direction_t direction, | |
1967 | Object **ret, | |
1968 | uint64_t *offset) { | |
1969 | ||
1970 | return generic_array_bisect(f, | |
1971 | le64toh(f->header->entry_array_offset), | |
1972 | le64toh(f->header->n_entries), | |
1973 | realtime, | |
1974 | test_object_realtime, | |
1975 | direction, | |
1976 | ret, offset, NULL); | |
1977 | } | |
1978 | ||
1979 | static int test_object_monotonic(JournalFile *f, uint64_t p, uint64_t needle) { | |
1980 | Object *o; | |
1981 | int r; | |
1982 | ||
1983 | assert(f); | |
1984 | assert(p > 0); | |
1985 | ||
1986 | r = journal_file_move_to_object(f, OBJECT_ENTRY, p, &o); | |
1987 | if (r < 0) | |
1988 | return r; | |
1989 | ||
1990 | if (le64toh(o->entry.monotonic) == needle) | |
1991 | return TEST_FOUND; | |
1992 | else if (le64toh(o->entry.monotonic) < needle) | |
1993 | return TEST_LEFT; | |
1994 | else | |
1995 | return TEST_RIGHT; | |
1996 | } | |
1997 | ||
2a560338 | 1998 | static int find_data_object_by_boot_id( |
47838ab3 ZJS |
1999 | JournalFile *f, |
2000 | sd_id128_t boot_id, | |
2001 | Object **o, | |
2002 | uint64_t *b) { | |
2a560338 | 2003 | |
47838ab3 ZJS |
2004 | char t[sizeof("_BOOT_ID=")-1 + 32 + 1] = "_BOOT_ID="; |
2005 | ||
2006 | sd_id128_to_string(boot_id, t + 9); | |
2007 | return journal_file_find_data_object(f, t, sizeof(t) - 1, o, b); | |
2008 | } | |
2009 | ||
de190aef LP |
2010 | int journal_file_move_to_entry_by_monotonic( |
2011 | JournalFile *f, | |
2012 | sd_id128_t boot_id, | |
2013 | uint64_t monotonic, | |
2014 | direction_t direction, | |
2015 | Object **ret, | |
2016 | uint64_t *offset) { | |
2017 | ||
de190aef LP |
2018 | Object *o; |
2019 | int r; | |
2020 | ||
cbdca852 | 2021 | assert(f); |
de190aef | 2022 | |
47838ab3 | 2023 | r = find_data_object_by_boot_id(f, boot_id, &o, NULL); |
de190aef LP |
2024 | if (r < 0) |
2025 | return r; | |
cbdca852 | 2026 | if (r == 0) |
de190aef LP |
2027 | return -ENOENT; |
2028 | ||
2029 | return generic_array_bisect_plus_one(f, | |
2030 | le64toh(o->data.entry_offset), | |
2031 | le64toh(o->data.entry_array_offset), | |
2032 | le64toh(o->data.n_entries), | |
2033 | monotonic, | |
2034 | test_object_monotonic, | |
2035 | direction, | |
2036 | ret, offset, NULL); | |
2037 | } | |
2038 | ||
1fc605b0 | 2039 | void journal_file_reset_location(JournalFile *f) { |
6573ef05 | 2040 | f->location_type = LOCATION_HEAD; |
1fc605b0 | 2041 | f->current_offset = 0; |
6573ef05 MS |
2042 | f->current_seqnum = 0; |
2043 | f->current_realtime = 0; | |
2044 | f->current_monotonic = 0; | |
2045 | zero(f->current_boot_id); | |
2046 | f->current_xor_hash = 0; | |
2047 | } | |
2048 | ||
950c07d4 | 2049 | void journal_file_save_location(JournalFile *f, Object *o, uint64_t offset) { |
6573ef05 MS |
2050 | f->location_type = LOCATION_SEEK; |
2051 | f->current_offset = offset; | |
2052 | f->current_seqnum = le64toh(o->entry.seqnum); | |
2053 | f->current_realtime = le64toh(o->entry.realtime); | |
2054 | f->current_monotonic = le64toh(o->entry.monotonic); | |
2055 | f->current_boot_id = o->entry.boot_id; | |
2056 | f->current_xor_hash = le64toh(o->entry.xor_hash); | |
1fc605b0 MS |
2057 | } |
2058 | ||
d8ae66d7 MS |
2059 | int journal_file_compare_locations(JournalFile *af, JournalFile *bf) { |
2060 | assert(af); | |
2061 | assert(bf); | |
2062 | assert(af->location_type == LOCATION_SEEK); | |
2063 | assert(bf->location_type == LOCATION_SEEK); | |
2064 | ||
2065 | /* If contents and timestamps match, these entries are | |
2066 | * identical, even if the seqnum does not match */ | |
2067 | if (sd_id128_equal(af->current_boot_id, bf->current_boot_id) && | |
2068 | af->current_monotonic == bf->current_monotonic && | |
2069 | af->current_realtime == bf->current_realtime && | |
2070 | af->current_xor_hash == bf->current_xor_hash) | |
2071 | return 0; | |
2072 | ||
2073 | if (sd_id128_equal(af->header->seqnum_id, bf->header->seqnum_id)) { | |
2074 | ||
2075 | /* If this is from the same seqnum source, compare | |
2076 | * seqnums */ | |
2077 | if (af->current_seqnum < bf->current_seqnum) | |
2078 | return -1; | |
2079 | if (af->current_seqnum > bf->current_seqnum) | |
2080 | return 1; | |
2081 | ||
2082 | /* Wow! This is weird, different data but the same | |
2083 | * seqnums? Something is borked, but let's make the | |
2084 | * best of it and compare by time. */ | |
2085 | } | |
2086 | ||
2087 | if (sd_id128_equal(af->current_boot_id, bf->current_boot_id)) { | |
2088 | ||
2089 | /* If the boot id matches, compare monotonic time */ | |
2090 | if (af->current_monotonic < bf->current_monotonic) | |
2091 | return -1; | |
2092 | if (af->current_monotonic > bf->current_monotonic) | |
2093 | return 1; | |
2094 | } | |
2095 | ||
2096 | /* Otherwise, compare UTC time */ | |
2097 | if (af->current_realtime < bf->current_realtime) | |
2098 | return -1; | |
2099 | if (af->current_realtime > bf->current_realtime) | |
2100 | return 1; | |
2101 | ||
2102 | /* Finally, compare by contents */ | |
2103 | if (af->current_xor_hash < bf->current_xor_hash) | |
2104 | return -1; | |
2105 | if (af->current_xor_hash > bf->current_xor_hash) | |
2106 | return 1; | |
2107 | ||
2108 | return 0; | |
2109 | } | |
2110 | ||
de190aef LP |
2111 | int journal_file_next_entry( |
2112 | JournalFile *f, | |
f534928a | 2113 | uint64_t p, |
de190aef LP |
2114 | direction_t direction, |
2115 | Object **ret, uint64_t *offset) { | |
2116 | ||
fb099c8d | 2117 | uint64_t i, n, ofs; |
cec736d2 LP |
2118 | int r; |
2119 | ||
2120 | assert(f); | |
de190aef LP |
2121 | |
2122 | n = le64toh(f->header->n_entries); | |
2123 | if (n <= 0) | |
2124 | return 0; | |
cec736d2 | 2125 | |
f534928a | 2126 | if (p == 0) |
de190aef | 2127 | i = direction == DIRECTION_DOWN ? 0 : n - 1; |
cec736d2 | 2128 | else { |
de190aef LP |
2129 | r = generic_array_bisect(f, |
2130 | le64toh(f->header->entry_array_offset), | |
2131 | le64toh(f->header->n_entries), | |
2132 | p, | |
2133 | test_object_offset, | |
2134 | DIRECTION_DOWN, | |
2135 | NULL, NULL, | |
2136 | &i); | |
2137 | if (r <= 0) | |
2138 | return r; | |
2139 | ||
2140 | if (direction == DIRECTION_DOWN) { | |
2141 | if (i >= n - 1) | |
2142 | return 0; | |
2143 | ||
2144 | i++; | |
2145 | } else { | |
2146 | if (i <= 0) | |
2147 | return 0; | |
2148 | ||
2149 | i--; | |
2150 | } | |
cec736d2 LP |
2151 | } |
2152 | ||
de190aef | 2153 | /* And jump to it */ |
fb099c8d ZJS |
2154 | r = generic_array_get(f, |
2155 | le64toh(f->header->entry_array_offset), | |
2156 | i, | |
2157 | ret, &ofs); | |
2158 | if (r <= 0) | |
2159 | return r; | |
2160 | ||
2161 | if (p > 0 && | |
2162 | (direction == DIRECTION_DOWN ? ofs <= p : ofs >= p)) { | |
2163 | log_debug("%s: entry array corrupted at entry %"PRIu64, | |
2164 | f->path, i); | |
2165 | return -EBADMSG; | |
2166 | } | |
2167 | ||
2168 | if (offset) | |
2169 | *offset = ofs; | |
2170 | ||
2171 | return 1; | |
de190aef | 2172 | } |
cec736d2 | 2173 | |
de190aef LP |
2174 | int journal_file_next_entry_for_data( |
2175 | JournalFile *f, | |
2176 | Object *o, uint64_t p, | |
2177 | uint64_t data_offset, | |
2178 | direction_t direction, | |
2179 | Object **ret, uint64_t *offset) { | |
2180 | ||
2181 | uint64_t n, i; | |
cec736d2 | 2182 | int r; |
de190aef | 2183 | Object *d; |
cec736d2 LP |
2184 | |
2185 | assert(f); | |
de190aef | 2186 | assert(p > 0 || !o); |
cec736d2 | 2187 | |
de190aef | 2188 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
466ccd92 | 2189 | if (r < 0) |
de190aef | 2190 | return r; |
cec736d2 | 2191 | |
de190aef LP |
2192 | n = le64toh(d->data.n_entries); |
2193 | if (n <= 0) | |
2194 | return n; | |
cec736d2 | 2195 | |
de190aef LP |
2196 | if (!o) |
2197 | i = direction == DIRECTION_DOWN ? 0 : n - 1; | |
2198 | else { | |
2199 | if (o->object.type != OBJECT_ENTRY) | |
2200 | return -EINVAL; | |
cec736d2 | 2201 | |
de190aef LP |
2202 | r = generic_array_bisect_plus_one(f, |
2203 | le64toh(d->data.entry_offset), | |
2204 | le64toh(d->data.entry_array_offset), | |
2205 | le64toh(d->data.n_entries), | |
2206 | p, | |
2207 | test_object_offset, | |
2208 | DIRECTION_DOWN, | |
2209 | NULL, NULL, | |
2210 | &i); | |
2211 | ||
2212 | if (r <= 0) | |
cec736d2 LP |
2213 | return r; |
2214 | ||
de190aef LP |
2215 | if (direction == DIRECTION_DOWN) { |
2216 | if (i >= n - 1) | |
2217 | return 0; | |
cec736d2 | 2218 | |
de190aef LP |
2219 | i++; |
2220 | } else { | |
2221 | if (i <= 0) | |
2222 | return 0; | |
cec736d2 | 2223 | |
de190aef LP |
2224 | i--; |
2225 | } | |
cec736d2 | 2226 | |
de190aef | 2227 | } |
cec736d2 | 2228 | |
de190aef LP |
2229 | return generic_array_get_plus_one(f, |
2230 | le64toh(d->data.entry_offset), | |
2231 | le64toh(d->data.entry_array_offset), | |
2232 | i, | |
2233 | ret, offset); | |
2234 | } | |
cec736d2 | 2235 | |
cbdca852 LP |
2236 | int journal_file_move_to_entry_by_offset_for_data( |
2237 | JournalFile *f, | |
2238 | uint64_t data_offset, | |
2239 | uint64_t p, | |
2240 | direction_t direction, | |
2241 | Object **ret, uint64_t *offset) { | |
2242 | ||
2243 | int r; | |
2244 | Object *d; | |
2245 | ||
2246 | assert(f); | |
2247 | ||
2248 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); | |
2249 | if (r < 0) | |
2250 | return r; | |
2251 | ||
2252 | return generic_array_bisect_plus_one(f, | |
2253 | le64toh(d->data.entry_offset), | |
2254 | le64toh(d->data.entry_array_offset), | |
2255 | le64toh(d->data.n_entries), | |
2256 | p, | |
2257 | test_object_offset, | |
2258 | direction, | |
2259 | ret, offset, NULL); | |
2260 | } | |
2261 | ||
2262 | int journal_file_move_to_entry_by_monotonic_for_data( | |
2263 | JournalFile *f, | |
2264 | uint64_t data_offset, | |
2265 | sd_id128_t boot_id, | |
2266 | uint64_t monotonic, | |
2267 | direction_t direction, | |
2268 | Object **ret, uint64_t *offset) { | |
2269 | ||
cbdca852 LP |
2270 | Object *o, *d; |
2271 | int r; | |
2272 | uint64_t b, z; | |
2273 | ||
2274 | assert(f); | |
2275 | ||
2276 | /* First, seek by time */ | |
47838ab3 | 2277 | r = find_data_object_by_boot_id(f, boot_id, &o, &b); |
cbdca852 LP |
2278 | if (r < 0) |
2279 | return r; | |
2280 | if (r == 0) | |
2281 | return -ENOENT; | |
2282 | ||
2283 | r = generic_array_bisect_plus_one(f, | |
2284 | le64toh(o->data.entry_offset), | |
2285 | le64toh(o->data.entry_array_offset), | |
2286 | le64toh(o->data.n_entries), | |
2287 | monotonic, | |
2288 | test_object_monotonic, | |
2289 | direction, | |
2290 | NULL, &z, NULL); | |
2291 | if (r <= 0) | |
2292 | return r; | |
2293 | ||
2294 | /* And now, continue seeking until we find an entry that | |
2295 | * exists in both bisection arrays */ | |
2296 | ||
2297 | for (;;) { | |
2298 | Object *qo; | |
2299 | uint64_t p, q; | |
2300 | ||
2301 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); | |
2302 | if (r < 0) | |
2303 | return r; | |
2304 | ||
2305 | r = generic_array_bisect_plus_one(f, | |
2306 | le64toh(d->data.entry_offset), | |
2307 | le64toh(d->data.entry_array_offset), | |
2308 | le64toh(d->data.n_entries), | |
2309 | z, | |
2310 | test_object_offset, | |
2311 | direction, | |
2312 | NULL, &p, NULL); | |
2313 | if (r <= 0) | |
2314 | return r; | |
2315 | ||
2316 | r = journal_file_move_to_object(f, OBJECT_DATA, b, &o); | |
2317 | if (r < 0) | |
2318 | return r; | |
2319 | ||
2320 | r = generic_array_bisect_plus_one(f, | |
2321 | le64toh(o->data.entry_offset), | |
2322 | le64toh(o->data.entry_array_offset), | |
2323 | le64toh(o->data.n_entries), | |
2324 | p, | |
2325 | test_object_offset, | |
2326 | direction, | |
2327 | &qo, &q, NULL); | |
2328 | ||
2329 | if (r <= 0) | |
2330 | return r; | |
2331 | ||
2332 | if (p == q) { | |
2333 | if (ret) | |
2334 | *ret = qo; | |
2335 | if (offset) | |
2336 | *offset = q; | |
2337 | ||
2338 | return 1; | |
2339 | } | |
2340 | ||
2341 | z = q; | |
2342 | } | |
cbdca852 LP |
2343 | } |
2344 | ||
de190aef LP |
2345 | int journal_file_move_to_entry_by_seqnum_for_data( |
2346 | JournalFile *f, | |
2347 | uint64_t data_offset, | |
2348 | uint64_t seqnum, | |
2349 | direction_t direction, | |
2350 | Object **ret, uint64_t *offset) { | |
cec736d2 | 2351 | |
de190aef LP |
2352 | Object *d; |
2353 | int r; | |
cec736d2 | 2354 | |
91a31dde LP |
2355 | assert(f); |
2356 | ||
de190aef | 2357 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
91a31dde | 2358 | if (r < 0) |
de190aef | 2359 | return r; |
cec736d2 | 2360 | |
de190aef LP |
2361 | return generic_array_bisect_plus_one(f, |
2362 | le64toh(d->data.entry_offset), | |
2363 | le64toh(d->data.entry_array_offset), | |
2364 | le64toh(d->data.n_entries), | |
2365 | seqnum, | |
2366 | test_object_seqnum, | |
2367 | direction, | |
2368 | ret, offset, NULL); | |
2369 | } | |
cec736d2 | 2370 | |
de190aef LP |
2371 | int journal_file_move_to_entry_by_realtime_for_data( |
2372 | JournalFile *f, | |
2373 | uint64_t data_offset, | |
2374 | uint64_t realtime, | |
2375 | direction_t direction, | |
2376 | Object **ret, uint64_t *offset) { | |
2377 | ||
2378 | Object *d; | |
2379 | int r; | |
2380 | ||
91a31dde LP |
2381 | assert(f); |
2382 | ||
de190aef | 2383 | r = journal_file_move_to_object(f, OBJECT_DATA, data_offset, &d); |
91a31dde | 2384 | if (r < 0) |
de190aef LP |
2385 | return r; |
2386 | ||
2387 | return generic_array_bisect_plus_one(f, | |
2388 | le64toh(d->data.entry_offset), | |
2389 | le64toh(d->data.entry_array_offset), | |
2390 | le64toh(d->data.n_entries), | |
2391 | realtime, | |
2392 | test_object_realtime, | |
2393 | direction, | |
2394 | ret, offset, NULL); | |
cec736d2 LP |
2395 | } |
2396 | ||
0284adc6 | 2397 | void journal_file_dump(JournalFile *f) { |
7560fffc | 2398 | Object *o; |
7560fffc | 2399 | int r; |
0284adc6 | 2400 | uint64_t p; |
7560fffc LP |
2401 | |
2402 | assert(f); | |
2403 | ||
0284adc6 | 2404 | journal_file_print_header(f); |
7560fffc | 2405 | |
0284adc6 LP |
2406 | p = le64toh(f->header->header_size); |
2407 | while (p != 0) { | |
d05089d8 | 2408 | r = journal_file_move_to_object(f, OBJECT_UNUSED, p, &o); |
0284adc6 LP |
2409 | if (r < 0) |
2410 | goto fail; | |
7560fffc | 2411 | |
0284adc6 | 2412 | switch (o->object.type) { |
d98cc1f2 | 2413 | |
0284adc6 LP |
2414 | case OBJECT_UNUSED: |
2415 | printf("Type: OBJECT_UNUSED\n"); | |
2416 | break; | |
d98cc1f2 | 2417 | |
0284adc6 LP |
2418 | case OBJECT_DATA: |
2419 | printf("Type: OBJECT_DATA\n"); | |
2420 | break; | |
7560fffc | 2421 | |
3c1668da LP |
2422 | case OBJECT_FIELD: |
2423 | printf("Type: OBJECT_FIELD\n"); | |
2424 | break; | |
2425 | ||
0284adc6 | 2426 | case OBJECT_ENTRY: |
507f22bd ZJS |
2427 | printf("Type: OBJECT_ENTRY seqnum=%"PRIu64" monotonic=%"PRIu64" realtime=%"PRIu64"\n", |
2428 | le64toh(o->entry.seqnum), | |
2429 | le64toh(o->entry.monotonic), | |
2430 | le64toh(o->entry.realtime)); | |
0284adc6 | 2431 | break; |
7560fffc | 2432 | |
0284adc6 LP |
2433 | case OBJECT_FIELD_HASH_TABLE: |
2434 | printf("Type: OBJECT_FIELD_HASH_TABLE\n"); | |
2435 | break; | |
7560fffc | 2436 | |
0284adc6 LP |
2437 | case OBJECT_DATA_HASH_TABLE: |
2438 | printf("Type: OBJECT_DATA_HASH_TABLE\n"); | |
2439 | break; | |
7560fffc | 2440 | |
0284adc6 LP |
2441 | case OBJECT_ENTRY_ARRAY: |
2442 | printf("Type: OBJECT_ENTRY_ARRAY\n"); | |
2443 | break; | |
7560fffc | 2444 | |
0284adc6 | 2445 | case OBJECT_TAG: |
507f22bd ZJS |
2446 | printf("Type: OBJECT_TAG seqnum=%"PRIu64" epoch=%"PRIu64"\n", |
2447 | le64toh(o->tag.seqnum), | |
2448 | le64toh(o->tag.epoch)); | |
0284adc6 | 2449 | break; |
3c1668da LP |
2450 | |
2451 | default: | |
8facc349 | 2452 | printf("Type: unknown (%i)\n", o->object.type); |
3c1668da | 2453 | break; |
0284adc6 | 2454 | } |
7560fffc | 2455 | |
d89c8fdf ZJS |
2456 | if (o->object.flags & OBJECT_COMPRESSION_MASK) |
2457 | printf("Flags: %s\n", | |
2458 | object_compressed_to_string(o->object.flags & OBJECT_COMPRESSION_MASK)); | |
7560fffc | 2459 | |
0284adc6 LP |
2460 | if (p == le64toh(f->header->tail_object_offset)) |
2461 | p = 0; | |
2462 | else | |
2463 | p = p + ALIGN64(le64toh(o->object.size)); | |
2464 | } | |
7560fffc | 2465 | |
0284adc6 LP |
2466 | return; |
2467 | fail: | |
2468 | log_error("File corrupt"); | |
7560fffc LP |
2469 | } |
2470 | ||
718fe4b1 ZJS |
2471 | static const char* format_timestamp_safe(char *buf, size_t l, usec_t t) { |
2472 | const char *x; | |
2473 | ||
2474 | x = format_timestamp(buf, l, t); | |
2475 | if (x) | |
2476 | return x; | |
2477 | return " --- "; | |
2478 | } | |
2479 | ||
0284adc6 | 2480 | void journal_file_print_header(JournalFile *f) { |
2765b7bb | 2481 | char a[33], b[33], c[33], d[33]; |
ed375beb | 2482 | char x[FORMAT_TIMESTAMP_MAX], y[FORMAT_TIMESTAMP_MAX], z[FORMAT_TIMESTAMP_MAX]; |
a1a03e30 LP |
2483 | struct stat st; |
2484 | char bytes[FORMAT_BYTES_MAX]; | |
7560fffc LP |
2485 | |
2486 | assert(f); | |
7560fffc | 2487 | |
0284adc6 LP |
2488 | printf("File Path: %s\n" |
2489 | "File ID: %s\n" | |
2490 | "Machine ID: %s\n" | |
2491 | "Boot ID: %s\n" | |
2492 | "Sequential Number ID: %s\n" | |
2493 | "State: %s\n" | |
2494 | "Compatible Flags:%s%s\n" | |
d89c8fdf | 2495 | "Incompatible Flags:%s%s%s\n" |
507f22bd ZJS |
2496 | "Header size: %"PRIu64"\n" |
2497 | "Arena size: %"PRIu64"\n" | |
2498 | "Data Hash Table Size: %"PRIu64"\n" | |
2499 | "Field Hash Table Size: %"PRIu64"\n" | |
0284adc6 | 2500 | "Rotate Suggested: %s\n" |
507f22bd ZJS |
2501 | "Head Sequential Number: %"PRIu64"\n" |
2502 | "Tail Sequential Number: %"PRIu64"\n" | |
0284adc6 | 2503 | "Head Realtime Timestamp: %s\n" |
3223f44f | 2504 | "Tail Realtime Timestamp: %s\n" |
ed375beb | 2505 | "Tail Monotonic Timestamp: %s\n" |
507f22bd ZJS |
2506 | "Objects: %"PRIu64"\n" |
2507 | "Entry Objects: %"PRIu64"\n", | |
0284adc6 LP |
2508 | f->path, |
2509 | sd_id128_to_string(f->header->file_id, a), | |
2510 | sd_id128_to_string(f->header->machine_id, b), | |
2511 | sd_id128_to_string(f->header->boot_id, c), | |
2765b7bb | 2512 | sd_id128_to_string(f->header->seqnum_id, d), |
3223f44f LP |
2513 | f->header->state == STATE_OFFLINE ? "OFFLINE" : |
2514 | f->header->state == STATE_ONLINE ? "ONLINE" : | |
2515 | f->header->state == STATE_ARCHIVED ? "ARCHIVED" : "UNKNOWN", | |
8088cbd3 | 2516 | JOURNAL_HEADER_SEALED(f->header) ? " SEALED" : "", |
d89c8fdf ZJS |
2517 | (le32toh(f->header->compatible_flags) & ~HEADER_COMPATIBLE_ANY) ? " ???" : "", |
2518 | JOURNAL_HEADER_COMPRESSED_XZ(f->header) ? " COMPRESSED-XZ" : "", | |
2519 | JOURNAL_HEADER_COMPRESSED_LZ4(f->header) ? " COMPRESSED-LZ4" : "", | |
2520 | (le32toh(f->header->incompatible_flags) & ~HEADER_INCOMPATIBLE_ANY) ? " ???" : "", | |
507f22bd ZJS |
2521 | le64toh(f->header->header_size), |
2522 | le64toh(f->header->arena_size), | |
2523 | le64toh(f->header->data_hash_table_size) / sizeof(HashItem), | |
2524 | le64toh(f->header->field_hash_table_size) / sizeof(HashItem), | |
fb0951b0 | 2525 | yes_no(journal_file_rotate_suggested(f, 0)), |
507f22bd ZJS |
2526 | le64toh(f->header->head_entry_seqnum), |
2527 | le64toh(f->header->tail_entry_seqnum), | |
718fe4b1 ZJS |
2528 | format_timestamp_safe(x, sizeof(x), le64toh(f->header->head_entry_realtime)), |
2529 | format_timestamp_safe(y, sizeof(y), le64toh(f->header->tail_entry_realtime)), | |
ed375beb | 2530 | format_timespan(z, sizeof(z), le64toh(f->header->tail_entry_monotonic), USEC_PER_MSEC), |
507f22bd ZJS |
2531 | le64toh(f->header->n_objects), |
2532 | le64toh(f->header->n_entries)); | |
7560fffc | 2533 | |
0284adc6 | 2534 | if (JOURNAL_HEADER_CONTAINS(f->header, n_data)) |
507f22bd | 2535 | printf("Data Objects: %"PRIu64"\n" |
0284adc6 | 2536 | "Data Hash Table Fill: %.1f%%\n", |
507f22bd | 2537 | le64toh(f->header->n_data), |
0284adc6 | 2538 | 100.0 * (double) le64toh(f->header->n_data) / ((double) (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)))); |
7560fffc | 2539 | |
0284adc6 | 2540 | if (JOURNAL_HEADER_CONTAINS(f->header, n_fields)) |
507f22bd | 2541 | printf("Field Objects: %"PRIu64"\n" |
0284adc6 | 2542 | "Field Hash Table Fill: %.1f%%\n", |
507f22bd | 2543 | le64toh(f->header->n_fields), |
0284adc6 | 2544 | 100.0 * (double) le64toh(f->header->n_fields) / ((double) (le64toh(f->header->field_hash_table_size) / sizeof(HashItem)))); |
3223f44f LP |
2545 | |
2546 | if (JOURNAL_HEADER_CONTAINS(f->header, n_tags)) | |
507f22bd ZJS |
2547 | printf("Tag Objects: %"PRIu64"\n", |
2548 | le64toh(f->header->n_tags)); | |
3223f44f | 2549 | if (JOURNAL_HEADER_CONTAINS(f->header, n_entry_arrays)) |
507f22bd ZJS |
2550 | printf("Entry Array Objects: %"PRIu64"\n", |
2551 | le64toh(f->header->n_entry_arrays)); | |
a1a03e30 LP |
2552 | |
2553 | if (fstat(f->fd, &st) >= 0) | |
59f448cf | 2554 | printf("Disk usage: %s\n", format_bytes(bytes, sizeof(bytes), (uint64_t) st.st_blocks * 512ULL)); |
7560fffc LP |
2555 | } |
2556 | ||
fc68c929 LP |
2557 | static int journal_file_warn_btrfs(JournalFile *f) { |
2558 | unsigned attrs; | |
2559 | int r; | |
2560 | ||
2561 | assert(f); | |
2562 | ||
2563 | /* Before we write anything, check if the COW logic is turned | |
2564 | * off on btrfs. Given our write pattern that is quite | |
2565 | * unfriendly to COW file systems this should greatly improve | |
2566 | * performance on COW file systems, such as btrfs, at the | |
2567 | * expense of data integrity features (which shouldn't be too | |
2568 | * bad, given that we do our own checksumming). */ | |
2569 | ||
2570 | r = btrfs_is_filesystem(f->fd); | |
2571 | if (r < 0) | |
2572 | return log_warning_errno(r, "Failed to determine if journal is on btrfs: %m"); | |
2573 | if (!r) | |
2574 | return 0; | |
2575 | ||
2576 | r = read_attr_fd(f->fd, &attrs); | |
2577 | if (r < 0) | |
2578 | return log_warning_errno(r, "Failed to read file attributes: %m"); | |
2579 | ||
2580 | if (attrs & FS_NOCOW_FL) { | |
2581 | log_debug("Detected btrfs file system with copy-on-write disabled, all is good."); | |
2582 | return 0; | |
2583 | } | |
2584 | ||
2585 | log_notice("Creating journal file %s on a btrfs file system, and copy-on-write is enabled. " | |
2586 | "This is likely to slow down journal access substantially, please consider turning " | |
2587 | "off the copy-on-write file attribute on the journal directory, using chattr +C.", f->path); | |
2588 | ||
2589 | return 1; | |
2590 | } | |
2591 | ||
0284adc6 LP |
2592 | int journal_file_open( |
2593 | const char *fname, | |
2594 | int flags, | |
2595 | mode_t mode, | |
2596 | bool compress, | |
baed47c3 | 2597 | bool seal, |
0284adc6 LP |
2598 | JournalMetrics *metrics, |
2599 | MMapCache *mmap_cache, | |
2600 | JournalFile *template, | |
2601 | JournalFile **ret) { | |
7560fffc | 2602 | |
fa6ac760 | 2603 | bool newly_created = false; |
0284adc6 | 2604 | JournalFile *f; |
fa6ac760 | 2605 | void *h; |
0284adc6 | 2606 | int r; |
7560fffc | 2607 | |
0284adc6 | 2608 | assert(fname); |
0559d3a5 | 2609 | assert(ret); |
7560fffc | 2610 | |
0284adc6 LP |
2611 | if ((flags & O_ACCMODE) != O_RDONLY && |
2612 | (flags & O_ACCMODE) != O_RDWR) | |
2613 | return -EINVAL; | |
7560fffc | 2614 | |
a0108012 LP |
2615 | if (!endswith(fname, ".journal") && |
2616 | !endswith(fname, ".journal~")) | |
0284adc6 | 2617 | return -EINVAL; |
7560fffc | 2618 | |
0284adc6 LP |
2619 | f = new0(JournalFile, 1); |
2620 | if (!f) | |
2621 | return -ENOMEM; | |
7560fffc | 2622 | |
0284adc6 LP |
2623 | f->fd = -1; |
2624 | f->mode = mode; | |
7560fffc | 2625 | |
0284adc6 LP |
2626 | f->flags = flags; |
2627 | f->prot = prot_from_flags(flags); | |
2628 | f->writable = (flags & O_ACCMODE) != O_RDONLY; | |
92261977 | 2629 | #if defined(HAVE_LZ4) |
d89c8fdf ZJS |
2630 | f->compress_lz4 = compress; |
2631 | #elif defined(HAVE_XZ) | |
2632 | f->compress_xz = compress; | |
48b61739 | 2633 | #endif |
49a32d43 | 2634 | #ifdef HAVE_GCRYPT |
baed47c3 | 2635 | f->seal = seal; |
49a32d43 | 2636 | #endif |
7560fffc | 2637 | |
0284adc6 LP |
2638 | if (mmap_cache) |
2639 | f->mmap = mmap_cache_ref(mmap_cache); | |
2640 | else { | |
84168d80 | 2641 | f->mmap = mmap_cache_new(); |
0284adc6 LP |
2642 | if (!f->mmap) { |
2643 | r = -ENOMEM; | |
2644 | goto fail; | |
2645 | } | |
2646 | } | |
7560fffc | 2647 | |
0284adc6 LP |
2648 | f->path = strdup(fname); |
2649 | if (!f->path) { | |
2650 | r = -ENOMEM; | |
2651 | goto fail; | |
2652 | } | |
7560fffc | 2653 | |
4743015d | 2654 | f->chain_cache = ordered_hashmap_new(&uint64_hash_ops); |
a4bcff5b LP |
2655 | if (!f->chain_cache) { |
2656 | r = -ENOMEM; | |
2657 | goto fail; | |
2658 | } | |
2659 | ||
0284adc6 LP |
2660 | f->fd = open(f->path, f->flags|O_CLOEXEC, f->mode); |
2661 | if (f->fd < 0) { | |
2662 | r = -errno; | |
2663 | goto fail; | |
7560fffc | 2664 | } |
7560fffc | 2665 | |
2678031a LP |
2666 | r = journal_file_fstat(f); |
2667 | if (r < 0) | |
0284adc6 | 2668 | goto fail; |
7560fffc | 2669 | |
0284adc6 | 2670 | if (f->last_stat.st_size == 0 && f->writable) { |
11689d2a | 2671 | |
fc68c929 | 2672 | (void) journal_file_warn_btrfs(f); |
11689d2a | 2673 | |
fb0951b0 LP |
2674 | /* Let's attach the creation time to the journal file, |
2675 | * so that the vacuuming code knows the age of this | |
2676 | * file even if the file might end up corrupted one | |
2677 | * day... Ideally we'd just use the creation time many | |
2678 | * file systems maintain for each file, but there is | |
2679 | * currently no usable API to query this, hence let's | |
2680 | * emulate this via extended attributes. If extended | |
2681 | * attributes are not supported we'll just skip this, | |
7517e174 | 2682 | * and rely solely on mtime/atime/ctime of the file. */ |
fb0951b0 | 2683 | |
d61b600d | 2684 | fd_setcrtime(f->fd, 0); |
7560fffc | 2685 | |
feb12d3e | 2686 | #ifdef HAVE_GCRYPT |
0284adc6 | 2687 | /* Try to load the FSPRG state, and if we can't, then |
baed47c3 | 2688 | * just don't do sealing */ |
49a32d43 LP |
2689 | if (f->seal) { |
2690 | r = journal_file_fss_load(f); | |
2691 | if (r < 0) | |
2692 | f->seal = false; | |
2693 | } | |
feb12d3e | 2694 | #endif |
7560fffc | 2695 | |
0284adc6 LP |
2696 | r = journal_file_init_header(f, template); |
2697 | if (r < 0) | |
2698 | goto fail; | |
7560fffc | 2699 | |
2678031a LP |
2700 | r = journal_file_fstat(f); |
2701 | if (r < 0) | |
0284adc6 | 2702 | goto fail; |
fb0951b0 LP |
2703 | |
2704 | newly_created = true; | |
0284adc6 | 2705 | } |
7560fffc | 2706 | |
0284adc6 | 2707 | if (f->last_stat.st_size < (off_t) HEADER_SIZE_MIN) { |
cfb571f3 | 2708 | r = -ENODATA; |
0284adc6 LP |
2709 | goto fail; |
2710 | } | |
7560fffc | 2711 | |
fa6ac760 | 2712 | r = mmap_cache_get(f->mmap, f->fd, f->prot, CONTEXT_HEADER, true, 0, PAGE_ALIGN(sizeof(Header)), &f->last_stat, &h); |
977eaa1e | 2713 | if (r < 0) |
0284adc6 | 2714 | goto fail; |
7560fffc | 2715 | |
fa6ac760 LP |
2716 | f->header = h; |
2717 | ||
0284adc6 LP |
2718 | if (!newly_created) { |
2719 | r = journal_file_verify_header(f); | |
2720 | if (r < 0) | |
2721 | goto fail; | |
2722 | } | |
7560fffc | 2723 | |
feb12d3e | 2724 | #ifdef HAVE_GCRYPT |
0284adc6 | 2725 | if (!newly_created && f->writable) { |
baed47c3 | 2726 | r = journal_file_fss_load(f); |
0284adc6 LP |
2727 | if (r < 0) |
2728 | goto fail; | |
2729 | } | |
feb12d3e | 2730 | #endif |
cec736d2 LP |
2731 | |
2732 | if (f->writable) { | |
4a92baf3 LP |
2733 | if (metrics) { |
2734 | journal_default_metrics(metrics, f->fd); | |
2735 | f->metrics = *metrics; | |
2736 | } else if (template) | |
2737 | f->metrics = template->metrics; | |
2738 | ||
cec736d2 LP |
2739 | r = journal_file_refresh_header(f); |
2740 | if (r < 0) | |
2741 | goto fail; | |
2742 | } | |
2743 | ||
feb12d3e | 2744 | #ifdef HAVE_GCRYPT |
baed47c3 | 2745 | r = journal_file_hmac_setup(f); |
14d10188 LP |
2746 | if (r < 0) |
2747 | goto fail; | |
feb12d3e | 2748 | #endif |
14d10188 | 2749 | |
cec736d2 | 2750 | if (newly_created) { |
de190aef | 2751 | r = journal_file_setup_field_hash_table(f); |
cec736d2 LP |
2752 | if (r < 0) |
2753 | goto fail; | |
2754 | ||
de190aef | 2755 | r = journal_file_setup_data_hash_table(f); |
cec736d2 LP |
2756 | if (r < 0) |
2757 | goto fail; | |
7560fffc | 2758 | |
feb12d3e | 2759 | #ifdef HAVE_GCRYPT |
7560fffc LP |
2760 | r = journal_file_append_first_tag(f); |
2761 | if (r < 0) | |
2762 | goto fail; | |
feb12d3e | 2763 | #endif |
cec736d2 LP |
2764 | } |
2765 | ||
fa6ac760 LP |
2766 | if (mmap_cache_got_sigbus(f->mmap, f->fd)) { |
2767 | r = -EIO; | |
2768 | goto fail; | |
2769 | } | |
2770 | ||
0559d3a5 | 2771 | *ret = f; |
cec736d2 LP |
2772 | return 0; |
2773 | ||
2774 | fail: | |
fa6ac760 LP |
2775 | if (f->fd >= 0 && mmap_cache_got_sigbus(f->mmap, f->fd)) |
2776 | r = -EIO; | |
2777 | ||
cec736d2 LP |
2778 | journal_file_close(f); |
2779 | ||
2780 | return r; | |
2781 | } | |
0ac38b70 | 2782 | |
baed47c3 | 2783 | int journal_file_rotate(JournalFile **f, bool compress, bool seal) { |
57535f47 | 2784 | _cleanup_free_ char *p = NULL; |
0ac38b70 LP |
2785 | size_t l; |
2786 | JournalFile *old_file, *new_file = NULL; | |
2787 | int r; | |
2788 | ||
2789 | assert(f); | |
2790 | assert(*f); | |
2791 | ||
2792 | old_file = *f; | |
2793 | ||
2794 | if (!old_file->writable) | |
2795 | return -EINVAL; | |
2796 | ||
2797 | if (!endswith(old_file->path, ".journal")) | |
2798 | return -EINVAL; | |
2799 | ||
2800 | l = strlen(old_file->path); | |
57535f47 ZJS |
2801 | r = asprintf(&p, "%.*s@" SD_ID128_FORMAT_STR "-%016"PRIx64"-%016"PRIx64".journal", |
2802 | (int) l - 8, old_file->path, | |
2803 | SD_ID128_FORMAT_VAL(old_file->header->seqnum_id), | |
2804 | le64toh((*f)->header->head_entry_seqnum), | |
2805 | le64toh((*f)->header->head_entry_realtime)); | |
2806 | if (r < 0) | |
0ac38b70 LP |
2807 | return -ENOMEM; |
2808 | ||
2678031a LP |
2809 | /* Try to rename the file to the archived version. If the file |
2810 | * already was deleted, we'll get ENOENT, let's ignore that | |
2811 | * case. */ | |
0ac38b70 | 2812 | r = rename(old_file->path, p); |
2678031a | 2813 | if (r < 0 && errno != ENOENT) |
0ac38b70 LP |
2814 | return -errno; |
2815 | ||
ccdbaf91 | 2816 | old_file->header->state = STATE_ARCHIVED; |
0ac38b70 | 2817 | |
f27a3864 LP |
2818 | /* Currently, btrfs is not very good with out write patterns |
2819 | * and fragments heavily. Let's defrag our journal files when | |
2820 | * we archive them */ | |
2821 | old_file->defrag_on_close = true; | |
2822 | ||
baed47c3 | 2823 | r = journal_file_open(old_file->path, old_file->flags, old_file->mode, compress, seal, NULL, old_file->mmap, old_file, &new_file); |
0ac38b70 LP |
2824 | journal_file_close(old_file); |
2825 | ||
2826 | *f = new_file; | |
2827 | return r; | |
2828 | } | |
2829 | ||
9447a7f1 LP |
2830 | int journal_file_open_reliably( |
2831 | const char *fname, | |
2832 | int flags, | |
2833 | mode_t mode, | |
7560fffc | 2834 | bool compress, |
baed47c3 | 2835 | bool seal, |
4a92baf3 | 2836 | JournalMetrics *metrics, |
27370278 | 2837 | MMapCache *mmap_cache, |
9447a7f1 LP |
2838 | JournalFile *template, |
2839 | JournalFile **ret) { | |
2840 | ||
2841 | int r; | |
2842 | size_t l; | |
ed375beb | 2843 | _cleanup_free_ char *p = NULL; |
9447a7f1 | 2844 | |
070052ab | 2845 | r = journal_file_open(fname, flags, mode, compress, seal, metrics, mmap_cache, template, ret); |
288359db ZJS |
2846 | if (!IN_SET(r, |
2847 | -EBADMSG, /* corrupted */ | |
2848 | -ENODATA, /* truncated */ | |
2849 | -EHOSTDOWN, /* other machine */ | |
2850 | -EPROTONOSUPPORT, /* incompatible feature */ | |
2851 | -EBUSY, /* unclean shutdown */ | |
2852 | -ESHUTDOWN, /* already archived */ | |
2853 | -EIO, /* IO error, including SIGBUS on mmap */ | |
2854 | -EIDRM /* File has been deleted */)) | |
9447a7f1 LP |
2855 | return r; |
2856 | ||
2857 | if ((flags & O_ACCMODE) == O_RDONLY) | |
2858 | return r; | |
2859 | ||
2860 | if (!(flags & O_CREAT)) | |
2861 | return r; | |
2862 | ||
7560fffc LP |
2863 | if (!endswith(fname, ".journal")) |
2864 | return r; | |
2865 | ||
5c70eab4 LP |
2866 | /* The file is corrupted. Rotate it away and try it again (but only once) */ |
2867 | ||
9447a7f1 | 2868 | l = strlen(fname); |
d587eca5 | 2869 | if (asprintf(&p, "%.*s@%016"PRIx64 "-%016"PRIx64 ".journal~", |
57535f47 | 2870 | (int) l - 8, fname, |
d587eca5 | 2871 | now(CLOCK_REALTIME), |
9bf3b535 | 2872 | random_u64()) < 0) |
9447a7f1 LP |
2873 | return -ENOMEM; |
2874 | ||
65089b82 | 2875 | if (rename(fname, p) < 0) |
9447a7f1 LP |
2876 | return -errno; |
2877 | ||
f27a3864 LP |
2878 | /* btrfs doesn't cope well with our write pattern and |
2879 | * fragments heavily. Let's defrag all files we rotate */ | |
11689d2a LP |
2880 | |
2881 | (void) chattr_path(p, false, FS_NOCOW_FL); | |
f27a3864 LP |
2882 | (void) btrfs_defrag(p); |
2883 | ||
65089b82 | 2884 | log_warning_errno(r, "File %s corrupted or uncleanly shut down, renaming and replacing.", fname); |
9447a7f1 | 2885 | |
070052ab | 2886 | return journal_file_open(fname, flags, mode, compress, seal, metrics, mmap_cache, template, ret); |
9447a7f1 LP |
2887 | } |
2888 | ||
cf244689 LP |
2889 | int journal_file_copy_entry(JournalFile *from, JournalFile *to, Object *o, uint64_t p, uint64_t *seqnum, Object **ret, uint64_t *offset) { |
2890 | uint64_t i, n; | |
2891 | uint64_t q, xor_hash = 0; | |
2892 | int r; | |
2893 | EntryItem *items; | |
2894 | dual_timestamp ts; | |
2895 | ||
2896 | assert(from); | |
2897 | assert(to); | |
2898 | assert(o); | |
2899 | assert(p); | |
2900 | ||
2901 | if (!to->writable) | |
2902 | return -EPERM; | |
2903 | ||
2904 | ts.monotonic = le64toh(o->entry.monotonic); | |
2905 | ts.realtime = le64toh(o->entry.realtime); | |
2906 | ||
cf244689 | 2907 | n = journal_file_entry_n_items(o); |
4faa7004 TA |
2908 | /* alloca() can't take 0, hence let's allocate at least one */ |
2909 | items = alloca(sizeof(EntryItem) * MAX(1u, n)); | |
cf244689 LP |
2910 | |
2911 | for (i = 0; i < n; i++) { | |
4fd052ae FC |
2912 | uint64_t l, h; |
2913 | le64_t le_hash; | |
cf244689 LP |
2914 | size_t t; |
2915 | void *data; | |
2916 | Object *u; | |
2917 | ||
2918 | q = le64toh(o->entry.items[i].object_offset); | |
2919 | le_hash = o->entry.items[i].hash; | |
2920 | ||
2921 | r = journal_file_move_to_object(from, OBJECT_DATA, q, &o); | |
2922 | if (r < 0) | |
2923 | return r; | |
2924 | ||
2925 | if (le_hash != o->data.hash) | |
2926 | return -EBADMSG; | |
2927 | ||
2928 | l = le64toh(o->object.size) - offsetof(Object, data.payload); | |
2929 | t = (size_t) l; | |
2930 | ||
2931 | /* We hit the limit on 32bit machines */ | |
2932 | if ((uint64_t) t != l) | |
2933 | return -E2BIG; | |
2934 | ||
d89c8fdf | 2935 | if (o->object.flags & OBJECT_COMPRESSION_MASK) { |
3b1a55e1 | 2936 | #if defined(HAVE_XZ) || defined(HAVE_LZ4) |
a7f7d1bd | 2937 | size_t rsize = 0; |
cf244689 | 2938 | |
d89c8fdf ZJS |
2939 | r = decompress_blob(o->object.flags & OBJECT_COMPRESSION_MASK, |
2940 | o->data.payload, l, &from->compress_buffer, &from->compress_buffer_size, &rsize, 0); | |
2941 | if (r < 0) | |
2942 | return r; | |
cf244689 LP |
2943 | |
2944 | data = from->compress_buffer; | |
2945 | l = rsize; | |
3b1a55e1 ZJS |
2946 | #else |
2947 | return -EPROTONOSUPPORT; | |
2948 | #endif | |
cf244689 LP |
2949 | } else |
2950 | data = o->data.payload; | |
2951 | ||
2952 | r = journal_file_append_data(to, data, l, &u, &h); | |
2953 | if (r < 0) | |
2954 | return r; | |
2955 | ||
2956 | xor_hash ^= le64toh(u->data.hash); | |
2957 | items[i].object_offset = htole64(h); | |
2958 | items[i].hash = u->data.hash; | |
2959 | ||
2960 | r = journal_file_move_to_object(from, OBJECT_ENTRY, p, &o); | |
2961 | if (r < 0) | |
2962 | return r; | |
2963 | } | |
2964 | ||
fa6ac760 LP |
2965 | r = journal_file_append_entry_internal(to, &ts, xor_hash, items, n, seqnum, ret, offset); |
2966 | ||
2967 | if (mmap_cache_got_sigbus(to->mmap, to->fd)) | |
2968 | return -EIO; | |
2969 | ||
2970 | return r; | |
cf244689 | 2971 | } |
babfc091 | 2972 | |
8580d1f7 LP |
2973 | void journal_reset_metrics(JournalMetrics *m) { |
2974 | assert(m); | |
2975 | ||
2976 | /* Set everything to "pick automatic values". */ | |
2977 | ||
2978 | *m = (JournalMetrics) { | |
2979 | .min_use = (uint64_t) -1, | |
2980 | .max_use = (uint64_t) -1, | |
2981 | .min_size = (uint64_t) -1, | |
2982 | .max_size = (uint64_t) -1, | |
2983 | .keep_free = (uint64_t) -1, | |
2984 | .n_max_files = (uint64_t) -1, | |
2985 | }; | |
2986 | } | |
2987 | ||
babfc091 | 2988 | void journal_default_metrics(JournalMetrics *m, int fd) { |
8580d1f7 | 2989 | char a[FORMAT_BYTES_MAX], b[FORMAT_BYTES_MAX], c[FORMAT_BYTES_MAX], d[FORMAT_BYTES_MAX], e[FORMAT_BYTES_MAX]; |
babfc091 | 2990 | struct statvfs ss; |
8580d1f7 | 2991 | uint64_t fs_size; |
babfc091 LP |
2992 | |
2993 | assert(m); | |
2994 | assert(fd >= 0); | |
2995 | ||
2996 | if (fstatvfs(fd, &ss) >= 0) | |
2997 | fs_size = ss.f_frsize * ss.f_blocks; | |
8580d1f7 LP |
2998 | else { |
2999 | log_debug_errno(errno, "Failed to detremine disk size: %m"); | |
3000 | fs_size = 0; | |
3001 | } | |
babfc091 LP |
3002 | |
3003 | if (m->max_use == (uint64_t) -1) { | |
3004 | ||
3005 | if (fs_size > 0) { | |
3006 | m->max_use = PAGE_ALIGN(fs_size / 10); /* 10% of file system size */ | |
3007 | ||
3008 | if (m->max_use > DEFAULT_MAX_USE_UPPER) | |
3009 | m->max_use = DEFAULT_MAX_USE_UPPER; | |
3010 | ||
3011 | if (m->max_use < DEFAULT_MAX_USE_LOWER) | |
3012 | m->max_use = DEFAULT_MAX_USE_LOWER; | |
3013 | } else | |
3014 | m->max_use = DEFAULT_MAX_USE_LOWER; | |
3015 | } else { | |
3016 | m->max_use = PAGE_ALIGN(m->max_use); | |
3017 | ||
8580d1f7 | 3018 | if (m->max_use != 0 && m->max_use < JOURNAL_FILE_SIZE_MIN*2) |
babfc091 LP |
3019 | m->max_use = JOURNAL_FILE_SIZE_MIN*2; |
3020 | } | |
3021 | ||
8580d1f7 LP |
3022 | if (m->min_use == (uint64_t) -1) |
3023 | m->min_use = DEFAULT_MIN_USE; | |
3024 | ||
3025 | if (m->min_use > m->max_use) | |
3026 | m->min_use = m->max_use; | |
3027 | ||
babfc091 LP |
3028 | if (m->max_size == (uint64_t) -1) { |
3029 | m->max_size = PAGE_ALIGN(m->max_use / 8); /* 8 chunks */ | |
3030 | ||
3031 | if (m->max_size > DEFAULT_MAX_SIZE_UPPER) | |
3032 | m->max_size = DEFAULT_MAX_SIZE_UPPER; | |
3033 | } else | |
3034 | m->max_size = PAGE_ALIGN(m->max_size); | |
3035 | ||
8580d1f7 LP |
3036 | if (m->max_size != 0) { |
3037 | if (m->max_size < JOURNAL_FILE_SIZE_MIN) | |
3038 | m->max_size = JOURNAL_FILE_SIZE_MIN; | |
babfc091 | 3039 | |
8580d1f7 LP |
3040 | if (m->max_use != 0 && m->max_size*2 > m->max_use) |
3041 | m->max_use = m->max_size*2; | |
3042 | } | |
babfc091 LP |
3043 | |
3044 | if (m->min_size == (uint64_t) -1) | |
3045 | m->min_size = JOURNAL_FILE_SIZE_MIN; | |
3046 | else { | |
3047 | m->min_size = PAGE_ALIGN(m->min_size); | |
3048 | ||
3049 | if (m->min_size < JOURNAL_FILE_SIZE_MIN) | |
3050 | m->min_size = JOURNAL_FILE_SIZE_MIN; | |
3051 | ||
8580d1f7 | 3052 | if (m->max_size != 0 && m->min_size > m->max_size) |
babfc091 LP |
3053 | m->max_size = m->min_size; |
3054 | } | |
3055 | ||
3056 | if (m->keep_free == (uint64_t) -1) { | |
3057 | ||
3058 | if (fs_size > 0) { | |
8621b110 | 3059 | m->keep_free = PAGE_ALIGN(fs_size * 3 / 20); /* 15% of file system size */ |
babfc091 LP |
3060 | |
3061 | if (m->keep_free > DEFAULT_KEEP_FREE_UPPER) | |
3062 | m->keep_free = DEFAULT_KEEP_FREE_UPPER; | |
3063 | ||
3064 | } else | |
3065 | m->keep_free = DEFAULT_KEEP_FREE; | |
3066 | } | |
3067 | ||
8580d1f7 LP |
3068 | if (m->n_max_files == (uint64_t) -1) |
3069 | m->n_max_files = DEFAULT_N_MAX_FILES; | |
3070 | ||
3071 | log_debug("Fixed min_use=%s max_use=%s max_size=%s min_size=%s keep_free=%s n_max_files=%" PRIu64, | |
3072 | format_bytes(a, sizeof(a), m->min_use), | |
3073 | format_bytes(b, sizeof(b), m->max_use), | |
3074 | format_bytes(c, sizeof(c), m->max_size), | |
3075 | format_bytes(d, sizeof(d), m->min_size), | |
3076 | format_bytes(e, sizeof(e), m->keep_free), | |
3077 | m->n_max_files); | |
babfc091 | 3078 | } |
08984293 LP |
3079 | |
3080 | int journal_file_get_cutoff_realtime_usec(JournalFile *f, usec_t *from, usec_t *to) { | |
08984293 LP |
3081 | assert(f); |
3082 | assert(from || to); | |
3083 | ||
3084 | if (from) { | |
162566a4 LP |
3085 | if (f->header->head_entry_realtime == 0) |
3086 | return -ENOENT; | |
08984293 | 3087 | |
162566a4 | 3088 | *from = le64toh(f->header->head_entry_realtime); |
08984293 LP |
3089 | } |
3090 | ||
3091 | if (to) { | |
162566a4 LP |
3092 | if (f->header->tail_entry_realtime == 0) |
3093 | return -ENOENT; | |
08984293 | 3094 | |
162566a4 | 3095 | *to = le64toh(f->header->tail_entry_realtime); |
08984293 LP |
3096 | } |
3097 | ||
3098 | return 1; | |
3099 | } | |
3100 | ||
3101 | int journal_file_get_cutoff_monotonic_usec(JournalFile *f, sd_id128_t boot_id, usec_t *from, usec_t *to) { | |
08984293 LP |
3102 | Object *o; |
3103 | uint64_t p; | |
3104 | int r; | |
3105 | ||
3106 | assert(f); | |
3107 | assert(from || to); | |
3108 | ||
47838ab3 | 3109 | r = find_data_object_by_boot_id(f, boot_id, &o, &p); |
08984293 LP |
3110 | if (r <= 0) |
3111 | return r; | |
3112 | ||
3113 | if (le64toh(o->data.n_entries) <= 0) | |
3114 | return 0; | |
3115 | ||
3116 | if (from) { | |
3117 | r = journal_file_move_to_object(f, OBJECT_ENTRY, le64toh(o->data.entry_offset), &o); | |
3118 | if (r < 0) | |
3119 | return r; | |
3120 | ||
3121 | *from = le64toh(o->entry.monotonic); | |
3122 | } | |
3123 | ||
3124 | if (to) { | |
3125 | r = journal_file_move_to_object(f, OBJECT_DATA, p, &o); | |
3126 | if (r < 0) | |
3127 | return r; | |
3128 | ||
3129 | r = generic_array_get_plus_one(f, | |
3130 | le64toh(o->data.entry_offset), | |
3131 | le64toh(o->data.entry_array_offset), | |
3132 | le64toh(o->data.n_entries)-1, | |
3133 | &o, NULL); | |
3134 | if (r <= 0) | |
3135 | return r; | |
3136 | ||
3137 | *to = le64toh(o->entry.monotonic); | |
3138 | } | |
3139 | ||
3140 | return 1; | |
3141 | } | |
dca6219e | 3142 | |
fb0951b0 | 3143 | bool journal_file_rotate_suggested(JournalFile *f, usec_t max_file_usec) { |
dca6219e LP |
3144 | assert(f); |
3145 | ||
3146 | /* If we gained new header fields we gained new features, | |
3147 | * hence suggest a rotation */ | |
361f9cbc LP |
3148 | if (le64toh(f->header->header_size) < sizeof(Header)) { |
3149 | log_debug("%s uses an outdated header, suggesting rotation.", f->path); | |
dca6219e | 3150 | return true; |
361f9cbc | 3151 | } |
dca6219e LP |
3152 | |
3153 | /* Let's check if the hash tables grew over a certain fill | |
3154 | * level (75%, borrowing this value from Java's hash table | |
3155 | * implementation), and if so suggest a rotation. To calculate | |
3156 | * the fill level we need the n_data field, which only exists | |
3157 | * in newer versions. */ | |
3158 | ||
3159 | if (JOURNAL_HEADER_CONTAINS(f->header, n_data)) | |
361f9cbc | 3160 | if (le64toh(f->header->n_data) * 4ULL > (le64toh(f->header->data_hash_table_size) / sizeof(HashItem)) * 3ULL) { |
507f22bd | 3161 | log_debug("Data hash table of %s has a fill level at %.1f (%"PRIu64" of %"PRIu64" items, %llu file size, %"PRIu64" bytes per hash table item), suggesting rotation.", |
361f9cbc LP |
3162 | f->path, |
3163 | 100.0 * (double) le64toh(f->header->n_data) / ((double) (le64toh(f->header->data_hash_table_size) / sizeof(HashItem))), | |
507f22bd ZJS |
3164 | le64toh(f->header->n_data), |
3165 | le64toh(f->header->data_hash_table_size) / sizeof(HashItem), | |
3166 | (unsigned long long) f->last_stat.st_size, | |
3167 | f->last_stat.st_size / le64toh(f->header->n_data)); | |
dca6219e | 3168 | return true; |
361f9cbc | 3169 | } |
dca6219e LP |
3170 | |
3171 | if (JOURNAL_HEADER_CONTAINS(f->header, n_fields)) | |
361f9cbc | 3172 | if (le64toh(f->header->n_fields) * 4ULL > (le64toh(f->header->field_hash_table_size) / sizeof(HashItem)) * 3ULL) { |
507f22bd | 3173 | log_debug("Field hash table of %s has a fill level at %.1f (%"PRIu64" of %"PRIu64" items), suggesting rotation.", |
361f9cbc LP |
3174 | f->path, |
3175 | 100.0 * (double) le64toh(f->header->n_fields) / ((double) (le64toh(f->header->field_hash_table_size) / sizeof(HashItem))), | |
507f22bd ZJS |
3176 | le64toh(f->header->n_fields), |
3177 | le64toh(f->header->field_hash_table_size) / sizeof(HashItem)); | |
dca6219e | 3178 | return true; |
361f9cbc | 3179 | } |
dca6219e | 3180 | |
0598fd4a LP |
3181 | /* Are the data objects properly indexed by field objects? */ |
3182 | if (JOURNAL_HEADER_CONTAINS(f->header, n_data) && | |
3183 | JOURNAL_HEADER_CONTAINS(f->header, n_fields) && | |
3184 | le64toh(f->header->n_data) > 0 && | |
3185 | le64toh(f->header->n_fields) == 0) | |
3186 | return true; | |
3187 | ||
fb0951b0 LP |
3188 | if (max_file_usec > 0) { |
3189 | usec_t t, h; | |
3190 | ||
3191 | h = le64toh(f->header->head_entry_realtime); | |
3192 | t = now(CLOCK_REALTIME); | |
3193 | ||
3194 | if (h > 0 && t > h + max_file_usec) | |
3195 | return true; | |
3196 | } | |
3197 | ||
dca6219e LP |
3198 | return false; |
3199 | } |