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Commit | Line | Data |
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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
b6e676ce LP |
2 | |
3 | #include <linux/fs.h> | |
4 | ||
5 | #include "sd-daemon.h" | |
6 | #include "sd-event.h" | |
07630cea | 7 | |
b5efdb8a | 8 | #include "alloc-util.h" |
b6e676ce LP |
9 | #include "btrfs-util.h" |
10 | #include "copy.h" | |
3ffd4af2 | 11 | #include "fd-util.h" |
53e03c96 | 12 | #include "format-util.h" |
f4f15635 | 13 | #include "fs-util.h" |
07630cea LP |
14 | #include "hostname-util.h" |
15 | #include "import-common.h" | |
16 | #include "import-compress.h" | |
3ffd4af2 | 17 | #include "import-raw.h" |
d32a5841 | 18 | #include "install-file.h" |
c004493c | 19 | #include "io-util.h" |
b6e676ce | 20 | #include "machine-pool.h" |
35cd0ba5 | 21 | #include "mkdir-label.h" |
07630cea | 22 | #include "path-util.h" |
b6e676ce | 23 | #include "qcow2-util.h" |
07630cea LP |
24 | #include "ratelimit.h" |
25 | #include "rm-rf.h" | |
26 | #include "string-util.h" | |
e4de7287 | 27 | #include "tmpfile-util.h" |
b6e676ce LP |
28 | |
29 | struct RawImport { | |
30 | sd_event *event; | |
31 | ||
32 | char *image_root; | |
33 | ||
34 | RawImportFinished on_finished; | |
35 | void *userdata; | |
36 | ||
37 | char *local; | |
5183c50a | 38 | ImportFlags flags; |
b6e676ce LP |
39 | |
40 | char *temp_path; | |
41 | char *final_path; | |
42 | ||
43 | int input_fd; | |
44 | int output_fd; | |
45 | ||
46 | ImportCompress compress; | |
47 | ||
b6e676ce LP |
48 | sd_event_source *input_event_source; |
49 | ||
50 | uint8_t buffer[16*1024]; | |
51 | size_t buffer_size; | |
52 | ||
53 | uint64_t written_compressed; | |
54 | uint64_t written_uncompressed; | |
55 | ||
d32a5841 LP |
56 | struct stat input_stat; |
57 | struct stat output_stat; | |
b6e676ce LP |
58 | |
59 | unsigned last_percent; | |
5ac1530e | 60 | RateLimit progress_ratelimit; |
d32a5841 LP |
61 | |
62 | uint64_t offset; | |
63 | uint64_t size_max; | |
b6e676ce LP |
64 | }; |
65 | ||
66 | RawImport* raw_import_unref(RawImport *i) { | |
67 | if (!i) | |
68 | return NULL; | |
69 | ||
d32a5841 | 70 | sd_event_source_unref(i->input_event_source); |
b6e676ce | 71 | |
0dfb6503 | 72 | unlink_and_free(i->temp_path); |
b6e676ce LP |
73 | |
74 | import_compress_free(&i->compress); | |
75 | ||
d32a5841 | 76 | sd_event_unref(i->event); |
b6e676ce LP |
77 | |
78 | safe_close(i->output_fd); | |
79 | ||
80 | free(i->final_path); | |
81 | free(i->image_root); | |
82 | free(i->local); | |
6b430fdb | 83 | return mfree(i); |
b6e676ce LP |
84 | } |
85 | ||
86 | int raw_import_new( | |
87 | RawImport **ret, | |
88 | sd_event *event, | |
89 | const char *image_root, | |
90 | RawImportFinished on_finished, | |
91 | void *userdata) { | |
92 | ||
93 | _cleanup_(raw_import_unrefp) RawImport *i = NULL; | |
0d94088e | 94 | _cleanup_free_ char *root = NULL; |
b6e676ce LP |
95 | int r; |
96 | ||
97 | assert(ret); | |
98 | ||
0d94088e YW |
99 | root = strdup(image_root ?: "/var/lib/machines"); |
100 | if (!root) | |
b6e676ce LP |
101 | return -ENOMEM; |
102 | ||
0d94088e YW |
103 | i = new(RawImport, 1); |
104 | if (!i) | |
b6e676ce LP |
105 | return -ENOMEM; |
106 | ||
0d94088e | 107 | *i = (RawImport) { |
254d1313 ZJS |
108 | .input_fd = -EBADF, |
109 | .output_fd = -EBADF, | |
0d94088e YW |
110 | .on_finished = on_finished, |
111 | .userdata = userdata, | |
f5fbe71d | 112 | .last_percent = UINT_MAX, |
0d94088e | 113 | .image_root = TAKE_PTR(root), |
5ac1530e | 114 | .progress_ratelimit = { 100 * USEC_PER_MSEC, 1 }, |
d32a5841 LP |
115 | .offset = UINT64_MAX, |
116 | .size_max = UINT64_MAX, | |
0d94088e YW |
117 | }; |
118 | ||
b6e676ce LP |
119 | if (event) |
120 | i->event = sd_event_ref(event); | |
121 | else { | |
122 | r = sd_event_default(&i->event); | |
123 | if (r < 0) | |
124 | return r; | |
125 | } | |
126 | ||
1cc6c93a | 127 | *ret = TAKE_PTR(i); |
b6e676ce LP |
128 | return 0; |
129 | } | |
130 | ||
131 | static void raw_import_report_progress(RawImport *i) { | |
132 | unsigned percent; | |
133 | assert(i); | |
134 | ||
135 | /* We have no size information, unless the source is a regular file */ | |
d32a5841 | 136 | if (!S_ISREG(i->input_stat.st_mode)) |
b6e676ce LP |
137 | return; |
138 | ||
d32a5841 | 139 | if (i->written_compressed >= (uint64_t) i->input_stat.st_size) |
b6e676ce LP |
140 | percent = 100; |
141 | else | |
d32a5841 | 142 | percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->input_stat.st_size); |
b6e676ce LP |
143 | |
144 | if (percent == i->last_percent) | |
145 | return; | |
146 | ||
5ac1530e | 147 | if (!ratelimit_below(&i->progress_ratelimit)) |
b6e676ce LP |
148 | return; |
149 | ||
150 | sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent); | |
151 | log_info("Imported %u%%.", percent); | |
152 | ||
153 | i->last_percent = percent; | |
154 | } | |
155 | ||
156 | static int raw_import_maybe_convert_qcow2(RawImport *i) { | |
254d1313 | 157 | _cleanup_close_ int converted_fd = -EBADF; |
d32a5841 LP |
158 | _cleanup_(unlink_and_freep) char *t = NULL; |
159 | _cleanup_free_ char *f = NULL; | |
b6e676ce LP |
160 | int r; |
161 | ||
162 | assert(i); | |
163 | ||
d32a5841 LP |
164 | /* Do QCOW2 conversion if enabled and not in direct mode */ |
165 | if ((i->flags & (IMPORT_CONVERT_QCOW2|IMPORT_DIRECT)) != IMPORT_CONVERT_QCOW2) | |
166 | return 0; | |
167 | ||
168 | assert(i->final_path); | |
169 | ||
b6e676ce LP |
170 | r = qcow2_detect(i->output_fd); |
171 | if (r < 0) | |
172 | return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m"); | |
173 | if (r == 0) | |
174 | return 0; | |
175 | ||
176 | /* This is a QCOW2 image, let's convert it */ | |
d32a5841 | 177 | r = tempfn_random(i->final_path, NULL, &f); |
b6e676ce LP |
178 | if (r < 0) |
179 | return log_oom(); | |
180 | ||
d32a5841 | 181 | converted_fd = open(f, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); |
b6e676ce | 182 | if (converted_fd < 0) |
d32a5841 LP |
183 | return log_error_errno(errno, "Failed to create %s: %m", f); |
184 | ||
185 | t = TAKE_PTR(f); | |
b6e676ce | 186 | |
137c6c6b | 187 | (void) import_set_nocow_and_log(converted_fd, t); |
b6e676ce LP |
188 | |
189 | log_info("Unpacking QCOW2 file."); | |
190 | ||
191 | r = qcow2_convert(i->output_fd, converted_fd); | |
d32a5841 | 192 | if (r < 0) |
b6e676ce | 193 | return log_error_errno(r, "Failed to convert qcow2 image: %m"); |
b6e676ce | 194 | |
d32a5841 LP |
195 | unlink_and_free(i->temp_path); |
196 | i->temp_path = TAKE_PTR(t); | |
ee3455cf | 197 | close_and_replace(i->output_fd, converted_fd); |
b6e676ce LP |
198 | |
199 | return 1; | |
200 | } | |
201 | ||
202 | static int raw_import_finish(RawImport *i) { | |
203 | int r; | |
204 | ||
205 | assert(i); | |
206 | assert(i->output_fd >= 0); | |
b6e676ce | 207 | |
d32a5841 LP |
208 | /* Nothing of what is below applies to block devices */ |
209 | if (S_ISBLK(i->output_stat.st_mode)) { | |
b6e676ce | 210 | |
d32a5841 LP |
211 | if (i->flags & IMPORT_SYNC) { |
212 | if (fsync(i->output_fd) < 0) | |
213 | return log_error_errno(errno, "Failed to synchronize block device: %m"); | |
214 | } | |
b6e676ce | 215 | |
d32a5841 | 216 | return 0; |
b6e676ce LP |
217 | } |
218 | ||
d32a5841 LP |
219 | assert(S_ISREG(i->output_stat.st_mode)); |
220 | ||
221 | /* If an offset is specified we only are supposed to affect part of an existing output file or block | |
222 | * device, thus don't manipulate file properties in that case */ | |
223 | ||
224 | if (i->offset == UINT64_MAX) { | |
225 | /* In case this was a sparse file, make sure the file size is right */ | |
226 | if (i->written_uncompressed > 0) { | |
227 | if (ftruncate(i->output_fd, i->written_uncompressed) < 0) | |
228 | return log_error_errno(errno, "Failed to truncate file: %m"); | |
229 | } | |
230 | ||
231 | r = raw_import_maybe_convert_qcow2(i); | |
b6e676ce LP |
232 | if (r < 0) |
233 | return r; | |
b6e676ce | 234 | |
d32a5841 LP |
235 | if (S_ISREG(i->input_stat.st_mode)) { |
236 | (void) copy_times(i->input_fd, i->output_fd, COPY_CRTIME); | |
c17cfe6e | 237 | (void) copy_xattr(i->input_fd, NULL, i->output_fd, NULL, 0); |
d32a5841 LP |
238 | } |
239 | } | |
b6e676ce | 240 | |
d32a5841 LP |
241 | r = install_file(AT_FDCWD, i->temp_path ?: i->local, |
242 | AT_FDCWD, i->final_path, | |
243 | (i->flags & IMPORT_FORCE ? INSTALL_REPLACE : 0) | | |
244 | (i->flags & IMPORT_READ_ONLY ? INSTALL_READ_ONLY : 0) | | |
245 | (i->flags & IMPORT_SYNC ? INSTALL_FSYNC_FULL : 0)); | |
f85ef957 AC |
246 | if (r < 0) |
247 | return log_error_errno(r, "Failed to move image into place: %m"); | |
b6e676ce | 248 | |
a1e58e8e | 249 | i->temp_path = mfree(i->temp_path); |
b6e676ce | 250 | |
53e03c96 LP |
251 | log_info("Wrote %s.", FORMAT_BYTES(i->written_uncompressed)); |
252 | ||
b6e676ce LP |
253 | return 0; |
254 | } | |
255 | ||
256 | static int raw_import_open_disk(RawImport *i) { | |
257 | int r; | |
258 | ||
259 | assert(i); | |
d32a5841 | 260 | assert(i->local); |
b6e676ce LP |
261 | assert(!i->final_path); |
262 | assert(!i->temp_path); | |
263 | assert(i->output_fd < 0); | |
264 | ||
d32a5841 LP |
265 | if (i->flags & IMPORT_DIRECT) { |
266 | (void) mkdir_parents_label(i->local, 0700); | |
b6e676ce | 267 | |
d32a5841 LP |
268 | /* In direct mode we just open/create the local path and truncate it (like shell > |
269 | * redirection would do it) — except if an offset was passed, in which case we are supposed | |
270 | * to operate on a section of the file only, in which case we apparently work on an some | |
271 | * existing thing (i.e. are not the sole thing stored in the file), in which case we will | |
272 | * neither truncate nor create. */ | |
273 | ||
274 | i->output_fd = open(i->local, O_RDWR|O_NOCTTY|O_CLOEXEC|(i->offset == UINT64_MAX ? O_TRUNC|O_CREAT : 0), 0664); | |
275 | if (i->output_fd < 0) | |
276 | return log_error_errno(errno, "Failed to open destination '%s': %m", i->local); | |
277 | ||
278 | if (i->offset == UINT64_MAX) | |
279 | (void) import_set_nocow_and_log(i->output_fd, i->local); | |
280 | } else { | |
281 | i->final_path = strjoin(i->image_root, "/", i->local, ".raw"); | |
282 | if (!i->final_path) | |
283 | return log_oom(); | |
284 | ||
285 | r = tempfn_random(i->final_path, NULL, &i->temp_path); | |
286 | if (r < 0) | |
287 | return log_oom(); | |
b6e676ce | 288 | |
d32a5841 | 289 | (void) mkdir_parents_label(i->temp_path, 0700); |
b6e676ce | 290 | |
d32a5841 LP |
291 | i->output_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); |
292 | if (i->output_fd < 0) | |
293 | return log_error_errno(errno, "Failed to open destination '%s': %m", i->temp_path); | |
294 | ||
295 | (void) import_set_nocow_and_log(i->output_fd, i->temp_path); | |
296 | } | |
297 | ||
298 | if (fstat(i->output_fd, &i->output_stat) < 0) | |
299 | return log_error_errno(errno, "Failed to stat() output file: %m"); | |
300 | ||
301 | if (!S_ISREG(i->output_stat.st_mode) && !S_ISBLK(i->output_stat.st_mode)) | |
302 | return log_error_errno(SYNTHETIC_ERRNO(EBADFD), | |
303 | "Target file is not a regular file or block device"); | |
304 | ||
305 | if (i->offset != UINT64_MAX) { | |
86cbbc6d | 306 | if (lseek(i->output_fd, i->offset, SEEK_SET) < 0) |
d32a5841 LP |
307 | return log_error_errno(errno, "Failed to seek to offset: %m"); |
308 | } | |
b6e676ce | 309 | |
b6e676ce LP |
310 | return 0; |
311 | } | |
312 | ||
313 | static int raw_import_try_reflink(RawImport *i) { | |
314 | off_t p; | |
315 | int r; | |
316 | ||
317 | assert(i); | |
318 | assert(i->input_fd >= 0); | |
319 | assert(i->output_fd >= 0); | |
320 | ||
321 | if (i->compress.type != IMPORT_COMPRESS_UNCOMPRESSED) | |
322 | return 0; | |
323 | ||
50b9c30c LP |
324 | if (i->offset != UINT64_MAX || i->size_max != UINT64_MAX) |
325 | return 0; | |
326 | ||
d32a5841 | 327 | if (!S_ISREG(i->input_stat.st_mode) || !S_ISREG(i->output_stat.st_mode)) |
b6e676ce LP |
328 | return 0; |
329 | ||
330 | p = lseek(i->input_fd, 0, SEEK_CUR); | |
86cbbc6d | 331 | if (p < 0) |
b6e676ce LP |
332 | return log_error_errno(errno, "Failed to read file offset of input file: %m"); |
333 | ||
334 | /* Let's only try a btrfs reflink, if we are reading from the beginning of the file */ | |
335 | if ((uint64_t) p != (uint64_t) i->buffer_size) | |
336 | return 0; | |
337 | ||
b640e274 | 338 | r = reflink(i->input_fd, i->output_fd); |
b6e676ce LP |
339 | if (r >= 0) |
340 | return 1; | |
341 | ||
d32a5841 | 342 | log_debug_errno(r, "Couldn't establish reflink, using copy: %m"); |
b6e676ce LP |
343 | return 0; |
344 | } | |
345 | ||
346 | static int raw_import_write(const void *p, size_t sz, void *userdata) { | |
99534007 | 347 | RawImport *i = ASSERT_PTR(userdata); |
d32a5841 LP |
348 | bool too_much = false; |
349 | int r; | |
b6e676ce | 350 | |
d32a5841 LP |
351 | assert(p); |
352 | assert(sz > 0); | |
353 | ||
354 | if (i->written_uncompressed >= UINT64_MAX - sz) | |
355 | return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "File too large, overflow"); | |
356 | ||
357 | if (i->size_max != UINT64_MAX) { | |
358 | if (i->written_uncompressed >= i->size_max) { | |
359 | too_much = true; | |
360 | goto finish; | |
361 | } | |
362 | ||
363 | if (i->written_uncompressed + sz > i->size_max) { | |
364 | too_much = true; | |
365 | sz = i->size_max - i->written_uncompressed; /* since we have the data in memory | |
366 | * already, we might as well write it to | |
367 | * disk to the max */ | |
368 | } | |
369 | } | |
370 | ||
371 | /* Generate sparse file if we created/truncated the file */ | |
bf284aee | 372 | if (S_ISREG(i->output_stat.st_mode) && i->offset == UINT64_MAX) { |
d32a5841 LP |
373 | ssize_t n; |
374 | ||
375 | n = sparse_write(i->output_fd, p, sz, 64); | |
376 | if (n < 0) | |
377 | return log_error_errno((int) n, "Failed to write file: %m"); | |
378 | if ((size_t) n < sz) | |
379 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short write"); | |
380 | } else { | |
e22c60a9 | 381 | r = loop_write(i->output_fd, p, sz); |
d32a5841 LP |
382 | if (r < 0) |
383 | return log_error_errno(r, "Failed to write file: %m"); | |
384 | } | |
b6e676ce LP |
385 | |
386 | i->written_uncompressed += sz; | |
b6e676ce | 387 | |
d32a5841 LP |
388 | finish: |
389 | if (too_much) | |
390 | return log_error_errno(SYNTHETIC_ERRNO(E2BIG), "File too large"); | |
391 | ||
b6e676ce LP |
392 | return 0; |
393 | } | |
394 | ||
395 | static int raw_import_process(RawImport *i) { | |
396 | ssize_t l; | |
397 | int r; | |
398 | ||
399 | assert(i); | |
400 | assert(i->buffer_size < sizeof(i->buffer)); | |
401 | ||
402 | l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size); | |
403 | if (l < 0) { | |
587fec42 LP |
404 | if (errno == EAGAIN) |
405 | return 0; | |
406 | ||
b6e676ce LP |
407 | r = log_error_errno(errno, "Failed to read input file: %m"); |
408 | goto finish; | |
409 | } | |
b6e676ce LP |
410 | |
411 | i->buffer_size += l; | |
412 | ||
413 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
c9b6ebef LP |
414 | |
415 | if (l == 0) { /* EOF */ | |
416 | log_debug("File too short to be compressed, as no compression signature fits in, thus assuming uncompressed."); | |
417 | import_uncompress_force_off(&i->compress); | |
418 | } else { | |
419 | r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size); | |
420 | if (r < 0) { | |
421 | log_error_errno(r, "Failed to detect file compression: %m"); | |
422 | goto finish; | |
423 | } | |
424 | if (r == 0) /* Need more data */ | |
425 | return 0; | |
b6e676ce | 426 | } |
b6e676ce LP |
427 | |
428 | r = raw_import_open_disk(i); | |
429 | if (r < 0) | |
430 | goto finish; | |
431 | ||
432 | r = raw_import_try_reflink(i); | |
433 | if (r < 0) | |
434 | goto finish; | |
c9b6ebef LP |
435 | if (r > 0) |
436 | goto complete; | |
b6e676ce LP |
437 | } |
438 | ||
439 | r = import_uncompress(&i->compress, i->buffer, i->buffer_size, raw_import_write, i); | |
440 | if (r < 0) { | |
441 | log_error_errno(r, "Failed to decode and write: %m"); | |
442 | goto finish; | |
443 | } | |
444 | ||
445 | i->written_compressed += i->buffer_size; | |
446 | i->buffer_size = 0; | |
447 | ||
c9b6ebef LP |
448 | if (l == 0) /* EOF */ |
449 | goto complete; | |
450 | ||
b6e676ce LP |
451 | raw_import_report_progress(i); |
452 | ||
453 | return 0; | |
454 | ||
c9b6ebef LP |
455 | complete: |
456 | r = raw_import_finish(i); | |
457 | ||
b6e676ce LP |
458 | finish: |
459 | if (i->on_finished) | |
460 | i->on_finished(i, r, i->userdata); | |
461 | else | |
462 | sd_event_exit(i->event, r); | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | static int raw_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
468 | RawImport *i = userdata; | |
469 | ||
470 | return raw_import_process(i); | |
471 | } | |
472 | ||
473 | static int raw_import_on_defer(sd_event_source *s, void *userdata) { | |
474 | RawImport *i = userdata; | |
475 | ||
476 | return raw_import_process(i); | |
477 | } | |
478 | ||
d32a5841 LP |
479 | int raw_import_start( |
480 | RawImport *i, | |
481 | int fd, | |
482 | const char *local, | |
483 | uint64_t offset, | |
484 | uint64_t size_max, | |
485 | ImportFlags flags) { | |
b6e676ce LP |
486 | int r; |
487 | ||
488 | assert(i); | |
489 | assert(fd >= 0); | |
490 | assert(local); | |
d32a5841 LP |
491 | assert(!(flags & ~IMPORT_FLAGS_MASK_RAW)); |
492 | assert(offset == UINT64_MAX || FLAGS_SET(flags, IMPORT_DIRECT)); | |
b6e676ce | 493 | |
d32a5841 | 494 | if (!import_validate_local(local, flags)) |
b6e676ce LP |
495 | return -EINVAL; |
496 | ||
497 | if (i->input_fd >= 0) | |
498 | return -EBUSY; | |
499 | ||
587fec42 LP |
500 | r = fd_nonblock(fd, true); |
501 | if (r < 0) | |
502 | return r; | |
503 | ||
b6e676ce LP |
504 | r = free_and_strdup(&i->local, local); |
505 | if (r < 0) | |
506 | return r; | |
5183c50a LP |
507 | |
508 | i->flags = flags; | |
d32a5841 LP |
509 | i->offset = offset; |
510 | i->size_max = size_max; | |
b6e676ce | 511 | |
d32a5841 | 512 | if (fstat(fd, &i->input_stat) < 0) |
b6e676ce LP |
513 | return -errno; |
514 | ||
515 | r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, raw_import_on_input, i); | |
516 | if (r == -EPERM) { | |
517 | /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */ | |
518 | r = sd_event_add_defer(i->event, &i->input_event_source, raw_import_on_defer, i); | |
519 | if (r < 0) | |
520 | return r; | |
521 | ||
522 | r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON); | |
523 | } | |
524 | if (r < 0) | |
525 | return r; | |
526 | ||
527 | i->input_fd = fd; | |
d32a5841 | 528 | return 0; |
b6e676ce | 529 | } |