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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
b6e676ce LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2015 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU Lesser General Public License as published by | |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public License | |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
19 | ***/ | |
20 | ||
21 | #include <linux/fs.h> | |
22 | ||
23 | #include "sd-daemon.h" | |
24 | #include "sd-event.h" | |
07630cea | 25 | |
b5efdb8a | 26 | #include "alloc-util.h" |
b6e676ce | 27 | #include "btrfs-util.h" |
c8b3094d | 28 | #include "chattr-util.h" |
b6e676ce | 29 | #include "copy.h" |
3ffd4af2 | 30 | #include "fd-util.h" |
0d39fa9c | 31 | #include "fileio.h" |
f4f15635 | 32 | #include "fs-util.h" |
07630cea LP |
33 | #include "hostname-util.h" |
34 | #include "import-common.h" | |
35 | #include "import-compress.h" | |
3ffd4af2 | 36 | #include "import-raw.h" |
c004493c | 37 | #include "io-util.h" |
b6e676ce | 38 | #include "machine-pool.h" |
07630cea LP |
39 | #include "mkdir.h" |
40 | #include "path-util.h" | |
b6e676ce | 41 | #include "qcow2-util.h" |
07630cea LP |
42 | #include "ratelimit.h" |
43 | #include "rm-rf.h" | |
44 | #include "string-util.h" | |
45 | #include "util.h" | |
b6e676ce LP |
46 | |
47 | struct RawImport { | |
48 | sd_event *event; | |
49 | ||
50 | char *image_root; | |
51 | ||
52 | RawImportFinished on_finished; | |
53 | void *userdata; | |
54 | ||
55 | char *local; | |
56 | bool force_local; | |
57 | bool read_only; | |
58 | bool grow_machine_directory; | |
59 | ||
60 | char *temp_path; | |
61 | char *final_path; | |
62 | ||
63 | int input_fd; | |
64 | int output_fd; | |
65 | ||
66 | ImportCompress compress; | |
67 | ||
68 | uint64_t written_since_last_grow; | |
69 | ||
70 | sd_event_source *input_event_source; | |
71 | ||
72 | uint8_t buffer[16*1024]; | |
73 | size_t buffer_size; | |
74 | ||
75 | uint64_t written_compressed; | |
76 | uint64_t written_uncompressed; | |
77 | ||
78 | struct stat st; | |
79 | ||
80 | unsigned last_percent; | |
81 | RateLimit progress_rate_limit; | |
82 | }; | |
83 | ||
84 | RawImport* raw_import_unref(RawImport *i) { | |
85 | if (!i) | |
86 | return NULL; | |
87 | ||
88 | sd_event_unref(i->event); | |
89 | ||
90 | if (i->temp_path) { | |
91 | (void) unlink(i->temp_path); | |
92 | free(i->temp_path); | |
93 | } | |
94 | ||
95 | import_compress_free(&i->compress); | |
96 | ||
97 | sd_event_source_unref(i->input_event_source); | |
98 | ||
99 | safe_close(i->output_fd); | |
100 | ||
101 | free(i->final_path); | |
102 | free(i->image_root); | |
103 | free(i->local); | |
6b430fdb | 104 | return mfree(i); |
b6e676ce LP |
105 | } |
106 | ||
107 | int raw_import_new( | |
108 | RawImport **ret, | |
109 | sd_event *event, | |
110 | const char *image_root, | |
111 | RawImportFinished on_finished, | |
112 | void *userdata) { | |
113 | ||
114 | _cleanup_(raw_import_unrefp) RawImport *i = NULL; | |
115 | int r; | |
116 | ||
117 | assert(ret); | |
118 | ||
119 | i = new0(RawImport, 1); | |
120 | if (!i) | |
121 | return -ENOMEM; | |
122 | ||
123 | i->input_fd = i->output_fd = -1; | |
124 | i->on_finished = on_finished; | |
125 | i->userdata = userdata; | |
126 | ||
587fec42 | 127 | RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1); |
b6e676ce LP |
128 | i->last_percent = (unsigned) -1; |
129 | ||
130 | i->image_root = strdup(image_root ?: "/var/lib/machines"); | |
131 | if (!i->image_root) | |
132 | return -ENOMEM; | |
133 | ||
134 | i->grow_machine_directory = path_startswith(i->image_root, "/var/lib/machines"); | |
135 | ||
136 | if (event) | |
137 | i->event = sd_event_ref(event); | |
138 | else { | |
139 | r = sd_event_default(&i->event); | |
140 | if (r < 0) | |
141 | return r; | |
142 | } | |
143 | ||
144 | *ret = i; | |
145 | i = NULL; | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static void raw_import_report_progress(RawImport *i) { | |
151 | unsigned percent; | |
152 | assert(i); | |
153 | ||
154 | /* We have no size information, unless the source is a regular file */ | |
155 | if (!S_ISREG(i->st.st_mode)) | |
156 | return; | |
157 | ||
158 | if (i->written_compressed >= (uint64_t) i->st.st_size) | |
159 | percent = 100; | |
160 | else | |
161 | percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->st.st_size); | |
162 | ||
163 | if (percent == i->last_percent) | |
164 | return; | |
165 | ||
166 | if (!ratelimit_test(&i->progress_rate_limit)) | |
167 | return; | |
168 | ||
169 | sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent); | |
170 | log_info("Imported %u%%.", percent); | |
171 | ||
172 | i->last_percent = percent; | |
173 | } | |
174 | ||
175 | static int raw_import_maybe_convert_qcow2(RawImport *i) { | |
176 | _cleanup_close_ int converted_fd = -1; | |
177 | _cleanup_free_ char *t = NULL; | |
178 | int r; | |
179 | ||
180 | assert(i); | |
181 | ||
182 | r = qcow2_detect(i->output_fd); | |
183 | if (r < 0) | |
184 | return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m"); | |
185 | if (r == 0) | |
186 | return 0; | |
187 | ||
188 | /* This is a QCOW2 image, let's convert it */ | |
14bcf25c | 189 | r = tempfn_random(i->final_path, NULL, &t); |
b6e676ce LP |
190 | if (r < 0) |
191 | return log_oom(); | |
192 | ||
193 | converted_fd = open(t, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); | |
194 | if (converted_fd < 0) | |
195 | return log_error_errno(errno, "Failed to create %s: %m", t); | |
196 | ||
1ed8f8c1 | 197 | r = chattr_fd(converted_fd, FS_NOCOW_FL, FS_NOCOW_FL); |
b6e676ce | 198 | if (r < 0) |
709f6e46 | 199 | log_warning_errno(r, "Failed to set file attributes on %s: %m", t); |
b6e676ce LP |
200 | |
201 | log_info("Unpacking QCOW2 file."); | |
202 | ||
203 | r = qcow2_convert(i->output_fd, converted_fd); | |
204 | if (r < 0) { | |
205 | unlink(t); | |
206 | return log_error_errno(r, "Failed to convert qcow2 image: %m"); | |
207 | } | |
208 | ||
209 | (void) unlink(i->temp_path); | |
f9ecfd3b | 210 | free_and_replace(i->temp_path, t); |
b6e676ce LP |
211 | |
212 | safe_close(i->output_fd); | |
213 | i->output_fd = converted_fd; | |
214 | converted_fd = -1; | |
215 | ||
216 | return 1; | |
217 | } | |
218 | ||
219 | static int raw_import_finish(RawImport *i) { | |
220 | int r; | |
221 | ||
222 | assert(i); | |
223 | assert(i->output_fd >= 0); | |
224 | assert(i->temp_path); | |
225 | assert(i->final_path); | |
226 | ||
227 | /* In case this was a sparse file, make sure the file system is right */ | |
228 | if (i->written_uncompressed > 0) { | |
229 | if (ftruncate(i->output_fd, i->written_uncompressed) < 0) | |
230 | return log_error_errno(errno, "Failed to truncate file: %m"); | |
231 | } | |
232 | ||
233 | r = raw_import_maybe_convert_qcow2(i); | |
234 | if (r < 0) | |
235 | return r; | |
236 | ||
237 | if (S_ISREG(i->st.st_mode)) { | |
238 | (void) copy_times(i->input_fd, i->output_fd); | |
239 | (void) copy_xattr(i->input_fd, i->output_fd); | |
240 | } | |
241 | ||
242 | if (i->read_only) { | |
243 | r = import_make_read_only_fd(i->output_fd); | |
244 | if (r < 0) | |
245 | return r; | |
246 | } | |
247 | ||
d9e2daaf LP |
248 | if (i->force_local) |
249 | (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); | |
b6e676ce | 250 | |
f85ef957 AC |
251 | r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path); |
252 | if (r < 0) | |
253 | return log_error_errno(r, "Failed to move image into place: %m"); | |
b6e676ce | 254 | |
a1e58e8e | 255 | i->temp_path = mfree(i->temp_path); |
b6e676ce LP |
256 | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static int raw_import_open_disk(RawImport *i) { | |
261 | int r; | |
262 | ||
263 | assert(i); | |
264 | ||
265 | assert(!i->final_path); | |
266 | assert(!i->temp_path); | |
267 | assert(i->output_fd < 0); | |
268 | ||
605405c6 | 269 | i->final_path = strjoin(i->image_root, "/", i->local, ".raw"); |
b6e676ce LP |
270 | if (!i->final_path) |
271 | return log_oom(); | |
272 | ||
14bcf25c | 273 | r = tempfn_random(i->final_path, NULL, &i->temp_path); |
b6e676ce LP |
274 | if (r < 0) |
275 | return log_oom(); | |
276 | ||
277 | (void) mkdir_parents_label(i->temp_path, 0700); | |
278 | ||
279 | i->output_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); | |
280 | if (i->output_fd < 0) | |
281 | return log_error_errno(errno, "Failed to open destination %s: %m", i->temp_path); | |
282 | ||
1ed8f8c1 | 283 | r = chattr_fd(i->output_fd, FS_NOCOW_FL, FS_NOCOW_FL); |
b6e676ce | 284 | if (r < 0) |
709f6e46 | 285 | log_warning_errno(r, "Failed to set file attributes on %s: %m", i->temp_path); |
b6e676ce LP |
286 | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int raw_import_try_reflink(RawImport *i) { | |
291 | off_t p; | |
292 | int r; | |
293 | ||
294 | assert(i); | |
295 | assert(i->input_fd >= 0); | |
296 | assert(i->output_fd >= 0); | |
297 | ||
298 | if (i->compress.type != IMPORT_COMPRESS_UNCOMPRESSED) | |
299 | return 0; | |
300 | ||
301 | if (!S_ISREG(i->st.st_mode)) | |
302 | return 0; | |
303 | ||
304 | p = lseek(i->input_fd, 0, SEEK_CUR); | |
305 | if (p == (off_t) -1) | |
306 | return log_error_errno(errno, "Failed to read file offset of input file: %m"); | |
307 | ||
308 | /* Let's only try a btrfs reflink, if we are reading from the beginning of the file */ | |
309 | if ((uint64_t) p != (uint64_t) i->buffer_size) | |
310 | return 0; | |
311 | ||
312 | r = btrfs_reflink(i->input_fd, i->output_fd); | |
313 | if (r >= 0) | |
314 | return 1; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
319 | static int raw_import_write(const void *p, size_t sz, void *userdata) { | |
320 | RawImport *i = userdata; | |
321 | ssize_t n; | |
322 | ||
323 | if (i->grow_machine_directory && i->written_since_last_grow >= GROW_INTERVAL_BYTES) { | |
324 | i->written_since_last_grow = 0; | |
325 | grow_machine_directory(); | |
326 | } | |
327 | ||
328 | n = sparse_write(i->output_fd, p, sz, 64); | |
329 | if (n < 0) | |
330 | return -errno; | |
331 | if ((size_t) n < sz) | |
332 | return -EIO; | |
333 | ||
334 | i->written_uncompressed += sz; | |
335 | i->written_since_last_grow += sz; | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | static int raw_import_process(RawImport *i) { | |
341 | ssize_t l; | |
342 | int r; | |
343 | ||
344 | assert(i); | |
345 | assert(i->buffer_size < sizeof(i->buffer)); | |
346 | ||
347 | l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size); | |
348 | if (l < 0) { | |
587fec42 LP |
349 | if (errno == EAGAIN) |
350 | return 0; | |
351 | ||
b6e676ce LP |
352 | r = log_error_errno(errno, "Failed to read input file: %m"); |
353 | goto finish; | |
354 | } | |
355 | if (l == 0) { | |
356 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
35bca925 | 357 | log_error("Premature end of file."); |
b6e676ce LP |
358 | r = -EIO; |
359 | goto finish; | |
360 | } | |
361 | ||
362 | r = raw_import_finish(i); | |
363 | goto finish; | |
364 | } | |
365 | ||
366 | i->buffer_size += l; | |
367 | ||
368 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
369 | r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size); | |
370 | if (r < 0) { | |
35bca925 | 371 | log_error_errno(r, "Failed to detect file compression: %m"); |
b6e676ce LP |
372 | goto finish; |
373 | } | |
374 | if (r == 0) /* Need more data */ | |
375 | return 0; | |
376 | ||
377 | r = raw_import_open_disk(i); | |
378 | if (r < 0) | |
379 | goto finish; | |
380 | ||
381 | r = raw_import_try_reflink(i); | |
382 | if (r < 0) | |
383 | goto finish; | |
384 | if (r > 0) { | |
385 | r = raw_import_finish(i); | |
386 | goto finish; | |
387 | } | |
388 | } | |
389 | ||
390 | r = import_uncompress(&i->compress, i->buffer, i->buffer_size, raw_import_write, i); | |
391 | if (r < 0) { | |
392 | log_error_errno(r, "Failed to decode and write: %m"); | |
393 | goto finish; | |
394 | } | |
395 | ||
396 | i->written_compressed += i->buffer_size; | |
397 | i->buffer_size = 0; | |
398 | ||
399 | raw_import_report_progress(i); | |
400 | ||
401 | return 0; | |
402 | ||
403 | finish: | |
404 | if (i->on_finished) | |
405 | i->on_finished(i, r, i->userdata); | |
406 | else | |
407 | sd_event_exit(i->event, r); | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | static int raw_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
413 | RawImport *i = userdata; | |
414 | ||
415 | return raw_import_process(i); | |
416 | } | |
417 | ||
418 | static int raw_import_on_defer(sd_event_source *s, void *userdata) { | |
419 | RawImport *i = userdata; | |
420 | ||
421 | return raw_import_process(i); | |
422 | } | |
423 | ||
424 | int raw_import_start(RawImport *i, int fd, const char *local, bool force_local, bool read_only) { | |
425 | int r; | |
426 | ||
427 | assert(i); | |
428 | assert(fd >= 0); | |
429 | assert(local); | |
430 | ||
431 | if (!machine_name_is_valid(local)) | |
432 | return -EINVAL; | |
433 | ||
434 | if (i->input_fd >= 0) | |
435 | return -EBUSY; | |
436 | ||
587fec42 LP |
437 | r = fd_nonblock(fd, true); |
438 | if (r < 0) | |
439 | return r; | |
440 | ||
b6e676ce LP |
441 | r = free_and_strdup(&i->local, local); |
442 | if (r < 0) | |
443 | return r; | |
444 | i->force_local = force_local; | |
445 | i->read_only = read_only; | |
446 | ||
447 | if (fstat(fd, &i->st) < 0) | |
448 | return -errno; | |
449 | ||
450 | r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, raw_import_on_input, i); | |
451 | if (r == -EPERM) { | |
452 | /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */ | |
453 | r = sd_event_add_defer(i->event, &i->input_event_source, raw_import_on_defer, i); | |
454 | if (r < 0) | |
455 | return r; | |
456 | ||
457 | r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON); | |
458 | } | |
459 | if (r < 0) | |
460 | return r; | |
461 | ||
462 | i->input_fd = fd; | |
463 | return r; | |
464 | } |