]>
Commit | Line | Data |
---|---|---|
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" |
07630cea | 28 | #include "util.h" |
b6e676ce LP |
29 | |
30 | struct RawImport { | |
31 | sd_event *event; | |
32 | ||
33 | char *image_root; | |
34 | ||
35 | RawImportFinished on_finished; | |
36 | void *userdata; | |
37 | ||
38 | char *local; | |
5183c50a | 39 | ImportFlags flags; |
b6e676ce LP |
40 | |
41 | char *temp_path; | |
42 | char *final_path; | |
43 | ||
44 | int input_fd; | |
45 | int output_fd; | |
46 | ||
47 | ImportCompress compress; | |
48 | ||
b6e676ce LP |
49 | sd_event_source *input_event_source; |
50 | ||
51 | uint8_t buffer[16*1024]; | |
52 | size_t buffer_size; | |
53 | ||
54 | uint64_t written_compressed; | |
55 | uint64_t written_uncompressed; | |
56 | ||
d32a5841 LP |
57 | struct stat input_stat; |
58 | struct stat output_stat; | |
b6e676ce LP |
59 | |
60 | unsigned last_percent; | |
5ac1530e | 61 | RateLimit progress_ratelimit; |
d32a5841 LP |
62 | |
63 | uint64_t offset; | |
64 | uint64_t size_max; | |
b6e676ce LP |
65 | }; |
66 | ||
67 | RawImport* raw_import_unref(RawImport *i) { | |
68 | if (!i) | |
69 | return NULL; | |
70 | ||
d32a5841 | 71 | sd_event_source_unref(i->input_event_source); |
b6e676ce | 72 | |
0dfb6503 | 73 | unlink_and_free(i->temp_path); |
b6e676ce LP |
74 | |
75 | import_compress_free(&i->compress); | |
76 | ||
d32a5841 | 77 | sd_event_unref(i->event); |
b6e676ce LP |
78 | |
79 | safe_close(i->output_fd); | |
80 | ||
81 | free(i->final_path); | |
82 | free(i->image_root); | |
83 | free(i->local); | |
6b430fdb | 84 | return mfree(i); |
b6e676ce LP |
85 | } |
86 | ||
87 | int raw_import_new( | |
88 | RawImport **ret, | |
89 | sd_event *event, | |
90 | const char *image_root, | |
91 | RawImportFinished on_finished, | |
92 | void *userdata) { | |
93 | ||
94 | _cleanup_(raw_import_unrefp) RawImport *i = NULL; | |
0d94088e | 95 | _cleanup_free_ char *root = NULL; |
b6e676ce LP |
96 | int r; |
97 | ||
98 | assert(ret); | |
99 | ||
0d94088e YW |
100 | root = strdup(image_root ?: "/var/lib/machines"); |
101 | if (!root) | |
b6e676ce LP |
102 | return -ENOMEM; |
103 | ||
0d94088e YW |
104 | i = new(RawImport, 1); |
105 | if (!i) | |
b6e676ce LP |
106 | return -ENOMEM; |
107 | ||
0d94088e YW |
108 | *i = (RawImport) { |
109 | .input_fd = -1, | |
110 | .output_fd = -1, | |
111 | .on_finished = on_finished, | |
112 | .userdata = userdata, | |
f5fbe71d | 113 | .last_percent = UINT_MAX, |
0d94088e | 114 | .image_root = TAKE_PTR(root), |
5ac1530e | 115 | .progress_ratelimit = { 100 * USEC_PER_MSEC, 1 }, |
d32a5841 LP |
116 | .offset = UINT64_MAX, |
117 | .size_max = UINT64_MAX, | |
0d94088e YW |
118 | }; |
119 | ||
b6e676ce LP |
120 | if (event) |
121 | i->event = sd_event_ref(event); | |
122 | else { | |
123 | r = sd_event_default(&i->event); | |
124 | if (r < 0) | |
125 | return r; | |
126 | } | |
127 | ||
1cc6c93a | 128 | *ret = TAKE_PTR(i); |
b6e676ce LP |
129 | return 0; |
130 | } | |
131 | ||
132 | static void raw_import_report_progress(RawImport *i) { | |
133 | unsigned percent; | |
134 | assert(i); | |
135 | ||
136 | /* We have no size information, unless the source is a regular file */ | |
d32a5841 | 137 | if (!S_ISREG(i->input_stat.st_mode)) |
b6e676ce LP |
138 | return; |
139 | ||
d32a5841 | 140 | if (i->written_compressed >= (uint64_t) i->input_stat.st_size) |
b6e676ce LP |
141 | percent = 100; |
142 | else | |
d32a5841 | 143 | percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->input_stat.st_size); |
b6e676ce LP |
144 | |
145 | if (percent == i->last_percent) | |
146 | return; | |
147 | ||
5ac1530e | 148 | if (!ratelimit_below(&i->progress_ratelimit)) |
b6e676ce LP |
149 | return; |
150 | ||
151 | sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent); | |
152 | log_info("Imported %u%%.", percent); | |
153 | ||
154 | i->last_percent = percent; | |
155 | } | |
156 | ||
157 | static int raw_import_maybe_convert_qcow2(RawImport *i) { | |
158 | _cleanup_close_ int converted_fd = -1; | |
d32a5841 LP |
159 | _cleanup_(unlink_and_freep) char *t = NULL; |
160 | _cleanup_free_ char *f = NULL; | |
b6e676ce LP |
161 | int r; |
162 | ||
163 | assert(i); | |
164 | ||
d32a5841 LP |
165 | /* Do QCOW2 conversion if enabled and not in direct mode */ |
166 | if ((i->flags & (IMPORT_CONVERT_QCOW2|IMPORT_DIRECT)) != IMPORT_CONVERT_QCOW2) | |
167 | return 0; | |
168 | ||
169 | assert(i->final_path); | |
170 | ||
b6e676ce LP |
171 | r = qcow2_detect(i->output_fd); |
172 | if (r < 0) | |
173 | return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m"); | |
174 | if (r == 0) | |
175 | return 0; | |
176 | ||
177 | /* This is a QCOW2 image, let's convert it */ | |
d32a5841 | 178 | r = tempfn_random(i->final_path, NULL, &f); |
b6e676ce LP |
179 | if (r < 0) |
180 | return log_oom(); | |
181 | ||
d32a5841 | 182 | converted_fd = open(f, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); |
b6e676ce | 183 | if (converted_fd < 0) |
d32a5841 LP |
184 | return log_error_errno(errno, "Failed to create %s: %m", f); |
185 | ||
186 | t = TAKE_PTR(f); | |
b6e676ce | 187 | |
137c6c6b | 188 | (void) import_set_nocow_and_log(converted_fd, t); |
b6e676ce LP |
189 | |
190 | log_info("Unpacking QCOW2 file."); | |
191 | ||
192 | r = qcow2_convert(i->output_fd, converted_fd); | |
d32a5841 | 193 | if (r < 0) |
b6e676ce | 194 | return log_error_errno(r, "Failed to convert qcow2 image: %m"); |
b6e676ce | 195 | |
d32a5841 LP |
196 | unlink_and_free(i->temp_path); |
197 | i->temp_path = TAKE_PTR(t); | |
ee3455cf | 198 | close_and_replace(i->output_fd, converted_fd); |
b6e676ce LP |
199 | |
200 | return 1; | |
201 | } | |
202 | ||
203 | static int raw_import_finish(RawImport *i) { | |
204 | int r; | |
205 | ||
206 | assert(i); | |
207 | assert(i->output_fd >= 0); | |
b6e676ce | 208 | |
d32a5841 LP |
209 | /* Nothing of what is below applies to block devices */ |
210 | if (S_ISBLK(i->output_stat.st_mode)) { | |
b6e676ce | 211 | |
d32a5841 LP |
212 | if (i->flags & IMPORT_SYNC) { |
213 | if (fsync(i->output_fd) < 0) | |
214 | return log_error_errno(errno, "Failed to synchronize block device: %m"); | |
215 | } | |
b6e676ce | 216 | |
d32a5841 | 217 | return 0; |
b6e676ce LP |
218 | } |
219 | ||
d32a5841 LP |
220 | assert(S_ISREG(i->output_stat.st_mode)); |
221 | ||
222 | /* If an offset is specified we only are supposed to affect part of an existing output file or block | |
223 | * device, thus don't manipulate file properties in that case */ | |
224 | ||
225 | if (i->offset == UINT64_MAX) { | |
226 | /* In case this was a sparse file, make sure the file size is right */ | |
227 | if (i->written_uncompressed > 0) { | |
228 | if (ftruncate(i->output_fd, i->written_uncompressed) < 0) | |
229 | return log_error_errno(errno, "Failed to truncate file: %m"); | |
230 | } | |
231 | ||
232 | r = raw_import_maybe_convert_qcow2(i); | |
b6e676ce LP |
233 | if (r < 0) |
234 | return r; | |
b6e676ce | 235 | |
d32a5841 LP |
236 | if (S_ISREG(i->input_stat.st_mode)) { |
237 | (void) copy_times(i->input_fd, i->output_fd, COPY_CRTIME); | |
238 | (void) copy_xattr(i->input_fd, i->output_fd, 0); | |
239 | } | |
240 | } | |
b6e676ce | 241 | |
d32a5841 LP |
242 | r = install_file(AT_FDCWD, i->temp_path ?: i->local, |
243 | AT_FDCWD, i->final_path, | |
244 | (i->flags & IMPORT_FORCE ? INSTALL_REPLACE : 0) | | |
245 | (i->flags & IMPORT_READ_ONLY ? INSTALL_READ_ONLY : 0) | | |
246 | (i->flags & IMPORT_SYNC ? INSTALL_FSYNC_FULL : 0)); | |
f85ef957 AC |
247 | if (r < 0) |
248 | return log_error_errno(r, "Failed to move image into place: %m"); | |
b6e676ce | 249 | |
a1e58e8e | 250 | i->temp_path = mfree(i->temp_path); |
b6e676ce | 251 | |
53e03c96 LP |
252 | log_info("Wrote %s.", FORMAT_BYTES(i->written_uncompressed)); |
253 | ||
b6e676ce LP |
254 | return 0; |
255 | } | |
256 | ||
257 | static int raw_import_open_disk(RawImport *i) { | |
258 | int r; | |
259 | ||
260 | assert(i); | |
d32a5841 | 261 | assert(i->local); |
b6e676ce LP |
262 | assert(!i->final_path); |
263 | assert(!i->temp_path); | |
264 | assert(i->output_fd < 0); | |
265 | ||
d32a5841 LP |
266 | if (i->flags & IMPORT_DIRECT) { |
267 | (void) mkdir_parents_label(i->local, 0700); | |
b6e676ce | 268 | |
d32a5841 LP |
269 | /* In direct mode we just open/create the local path and truncate it (like shell > |
270 | * redirection would do it) — except if an offset was passed, in which case we are supposed | |
271 | * to operate on a section of the file only, in which case we apparently work on an some | |
272 | * existing thing (i.e. are not the sole thing stored in the file), in which case we will | |
273 | * neither truncate nor create. */ | |
274 | ||
275 | i->output_fd = open(i->local, O_RDWR|O_NOCTTY|O_CLOEXEC|(i->offset == UINT64_MAX ? O_TRUNC|O_CREAT : 0), 0664); | |
276 | if (i->output_fd < 0) | |
277 | return log_error_errno(errno, "Failed to open destination '%s': %m", i->local); | |
278 | ||
279 | if (i->offset == UINT64_MAX) | |
280 | (void) import_set_nocow_and_log(i->output_fd, i->local); | |
281 | } else { | |
282 | i->final_path = strjoin(i->image_root, "/", i->local, ".raw"); | |
283 | if (!i->final_path) | |
284 | return log_oom(); | |
285 | ||
286 | r = tempfn_random(i->final_path, NULL, &i->temp_path); | |
287 | if (r < 0) | |
288 | return log_oom(); | |
b6e676ce | 289 | |
d32a5841 | 290 | (void) mkdir_parents_label(i->temp_path, 0700); |
b6e676ce | 291 | |
d32a5841 LP |
292 | i->output_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); |
293 | if (i->output_fd < 0) | |
294 | return log_error_errno(errno, "Failed to open destination '%s': %m", i->temp_path); | |
295 | ||
296 | (void) import_set_nocow_and_log(i->output_fd, i->temp_path); | |
297 | } | |
298 | ||
299 | if (fstat(i->output_fd, &i->output_stat) < 0) | |
300 | return log_error_errno(errno, "Failed to stat() output file: %m"); | |
301 | ||
302 | if (!S_ISREG(i->output_stat.st_mode) && !S_ISBLK(i->output_stat.st_mode)) | |
303 | return log_error_errno(SYNTHETIC_ERRNO(EBADFD), | |
304 | "Target file is not a regular file or block device"); | |
305 | ||
306 | if (i->offset != UINT64_MAX) { | |
307 | if (lseek(i->output_fd, i->offset, SEEK_SET) == (off_t) -1) | |
308 | return log_error_errno(errno, "Failed to seek to offset: %m"); | |
309 | } | |
b6e676ce | 310 | |
b6e676ce LP |
311 | return 0; |
312 | } | |
313 | ||
314 | static int raw_import_try_reflink(RawImport *i) { | |
315 | off_t p; | |
316 | int r; | |
317 | ||
318 | assert(i); | |
319 | assert(i->input_fd >= 0); | |
320 | assert(i->output_fd >= 0); | |
321 | ||
322 | if (i->compress.type != IMPORT_COMPRESS_UNCOMPRESSED) | |
323 | return 0; | |
324 | ||
50b9c30c LP |
325 | if (i->offset != UINT64_MAX || i->size_max != UINT64_MAX) |
326 | return 0; | |
327 | ||
d32a5841 | 328 | if (!S_ISREG(i->input_stat.st_mode) || !S_ISREG(i->output_stat.st_mode)) |
b6e676ce LP |
329 | return 0; |
330 | ||
331 | p = lseek(i->input_fd, 0, SEEK_CUR); | |
332 | if (p == (off_t) -1) | |
333 | return log_error_errno(errno, "Failed to read file offset of input file: %m"); | |
334 | ||
335 | /* Let's only try a btrfs reflink, if we are reading from the beginning of the file */ | |
336 | if ((uint64_t) p != (uint64_t) i->buffer_size) | |
337 | return 0; | |
338 | ||
339 | r = btrfs_reflink(i->input_fd, i->output_fd); | |
340 | if (r >= 0) | |
341 | return 1; | |
342 | ||
d32a5841 | 343 | log_debug_errno(r, "Couldn't establish reflink, using copy: %m"); |
b6e676ce LP |
344 | return 0; |
345 | } | |
346 | ||
347 | static int raw_import_write(const void *p, size_t sz, void *userdata) { | |
99534007 | 348 | RawImport *i = ASSERT_PTR(userdata); |
d32a5841 LP |
349 | bool too_much = false; |
350 | int r; | |
b6e676ce | 351 | |
d32a5841 LP |
352 | assert(p); |
353 | assert(sz > 0); | |
354 | ||
355 | if (i->written_uncompressed >= UINT64_MAX - sz) | |
356 | return log_error_errno(SYNTHETIC_ERRNO(EOVERFLOW), "File too large, overflow"); | |
357 | ||
358 | if (i->size_max != UINT64_MAX) { | |
359 | if (i->written_uncompressed >= i->size_max) { | |
360 | too_much = true; | |
361 | goto finish; | |
362 | } | |
363 | ||
364 | if (i->written_uncompressed + sz > i->size_max) { | |
365 | too_much = true; | |
366 | sz = i->size_max - i->written_uncompressed; /* since we have the data in memory | |
367 | * already, we might as well write it to | |
368 | * disk to the max */ | |
369 | } | |
370 | } | |
371 | ||
372 | /* Generate sparse file if we created/truncated the file */ | |
bf284aee | 373 | if (S_ISREG(i->output_stat.st_mode) && i->offset == UINT64_MAX) { |
d32a5841 LP |
374 | ssize_t n; |
375 | ||
376 | n = sparse_write(i->output_fd, p, sz, 64); | |
377 | if (n < 0) | |
378 | return log_error_errno((int) n, "Failed to write file: %m"); | |
379 | if ((size_t) n < sz) | |
380 | return log_error_errno(SYNTHETIC_ERRNO(EIO), "Short write"); | |
381 | } else { | |
382 | r = loop_write(i->output_fd, p, sz, false); | |
383 | if (r < 0) | |
384 | return log_error_errno(r, "Failed to write file: %m"); | |
385 | } | |
b6e676ce LP |
386 | |
387 | i->written_uncompressed += sz; | |
b6e676ce | 388 | |
d32a5841 LP |
389 | finish: |
390 | if (too_much) | |
391 | return log_error_errno(SYNTHETIC_ERRNO(E2BIG), "File too large"); | |
392 | ||
b6e676ce LP |
393 | return 0; |
394 | } | |
395 | ||
396 | static int raw_import_process(RawImport *i) { | |
397 | ssize_t l; | |
398 | int r; | |
399 | ||
400 | assert(i); | |
401 | assert(i->buffer_size < sizeof(i->buffer)); | |
402 | ||
403 | l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size); | |
404 | if (l < 0) { | |
587fec42 LP |
405 | if (errno == EAGAIN) |
406 | return 0; | |
407 | ||
b6e676ce LP |
408 | r = log_error_errno(errno, "Failed to read input file: %m"); |
409 | goto finish; | |
410 | } | |
b6e676ce LP |
411 | |
412 | i->buffer_size += l; | |
413 | ||
414 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
c9b6ebef LP |
415 | |
416 | if (l == 0) { /* EOF */ | |
417 | log_debug("File too short to be compressed, as no compression signature fits in, thus assuming uncompressed."); | |
418 | import_uncompress_force_off(&i->compress); | |
419 | } else { | |
420 | r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size); | |
421 | if (r < 0) { | |
422 | log_error_errno(r, "Failed to detect file compression: %m"); | |
423 | goto finish; | |
424 | } | |
425 | if (r == 0) /* Need more data */ | |
426 | return 0; | |
b6e676ce | 427 | } |
b6e676ce LP |
428 | |
429 | r = raw_import_open_disk(i); | |
430 | if (r < 0) | |
431 | goto finish; | |
432 | ||
433 | r = raw_import_try_reflink(i); | |
434 | if (r < 0) | |
435 | goto finish; | |
c9b6ebef LP |
436 | if (r > 0) |
437 | goto complete; | |
b6e676ce LP |
438 | } |
439 | ||
440 | r = import_uncompress(&i->compress, i->buffer, i->buffer_size, raw_import_write, i); | |
441 | if (r < 0) { | |
442 | log_error_errno(r, "Failed to decode and write: %m"); | |
443 | goto finish; | |
444 | } | |
445 | ||
446 | i->written_compressed += i->buffer_size; | |
447 | i->buffer_size = 0; | |
448 | ||
c9b6ebef LP |
449 | if (l == 0) /* EOF */ |
450 | goto complete; | |
451 | ||
b6e676ce LP |
452 | raw_import_report_progress(i); |
453 | ||
454 | return 0; | |
455 | ||
c9b6ebef LP |
456 | complete: |
457 | r = raw_import_finish(i); | |
458 | ||
b6e676ce LP |
459 | finish: |
460 | if (i->on_finished) | |
461 | i->on_finished(i, r, i->userdata); | |
462 | else | |
463 | sd_event_exit(i->event, r); | |
464 | ||
465 | return 0; | |
466 | } | |
467 | ||
468 | static int raw_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
469 | RawImport *i = userdata; | |
470 | ||
471 | return raw_import_process(i); | |
472 | } | |
473 | ||
474 | static int raw_import_on_defer(sd_event_source *s, void *userdata) { | |
475 | RawImport *i = userdata; | |
476 | ||
477 | return raw_import_process(i); | |
478 | } | |
479 | ||
d32a5841 LP |
480 | int raw_import_start( |
481 | RawImport *i, | |
482 | int fd, | |
483 | const char *local, | |
484 | uint64_t offset, | |
485 | uint64_t size_max, | |
486 | ImportFlags flags) { | |
b6e676ce LP |
487 | int r; |
488 | ||
489 | assert(i); | |
490 | assert(fd >= 0); | |
491 | assert(local); | |
d32a5841 LP |
492 | assert(!(flags & ~IMPORT_FLAGS_MASK_RAW)); |
493 | assert(offset == UINT64_MAX || FLAGS_SET(flags, IMPORT_DIRECT)); | |
b6e676ce | 494 | |
d32a5841 | 495 | if (!import_validate_local(local, flags)) |
b6e676ce LP |
496 | return -EINVAL; |
497 | ||
498 | if (i->input_fd >= 0) | |
499 | return -EBUSY; | |
500 | ||
587fec42 LP |
501 | r = fd_nonblock(fd, true); |
502 | if (r < 0) | |
503 | return r; | |
504 | ||
b6e676ce LP |
505 | r = free_and_strdup(&i->local, local); |
506 | if (r < 0) | |
507 | return r; | |
5183c50a LP |
508 | |
509 | i->flags = flags; | |
d32a5841 LP |
510 | i->offset = offset; |
511 | i->size_max = size_max; | |
b6e676ce | 512 | |
d32a5841 | 513 | if (fstat(fd, &i->input_stat) < 0) |
b6e676ce LP |
514 | return -errno; |
515 | ||
516 | r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, raw_import_on_input, i); | |
517 | if (r == -EPERM) { | |
518 | /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */ | |
519 | r = sd_event_add_defer(i->event, &i->input_event_source, raw_import_on_defer, i); | |
520 | if (r < 0) | |
521 | return r; | |
522 | ||
523 | r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON); | |
524 | } | |
525 | if (r < 0) | |
526 | return r; | |
527 | ||
528 | i->input_fd = fd; | |
d32a5841 | 529 | return 0; |
b6e676ce | 530 | } |