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Commit | Line | Data |
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b6e676ce LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2015 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | Lesser General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU Lesser General Public License | |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
18 | ***/ | |
19 | ||
20 | #include <linux/fs.h> | |
21 | ||
22 | #include "sd-daemon.h" | |
23 | #include "sd-event.h" | |
07630cea | 24 | |
b5efdb8a | 25 | #include "alloc-util.h" |
b6e676ce | 26 | #include "btrfs-util.h" |
c8b3094d | 27 | #include "chattr-util.h" |
b6e676ce | 28 | #include "copy.h" |
3ffd4af2 | 29 | #include "fd-util.h" |
0d39fa9c | 30 | #include "fileio.h" |
f4f15635 | 31 | #include "fs-util.h" |
07630cea LP |
32 | #include "hostname-util.h" |
33 | #include "import-common.h" | |
34 | #include "import-compress.h" | |
3ffd4af2 | 35 | #include "import-raw.h" |
c004493c | 36 | #include "io-util.h" |
b6e676ce | 37 | #include "machine-pool.h" |
07630cea LP |
38 | #include "mkdir.h" |
39 | #include "path-util.h" | |
b6e676ce | 40 | #include "qcow2-util.h" |
07630cea LP |
41 | #include "ratelimit.h" |
42 | #include "rm-rf.h" | |
43 | #include "string-util.h" | |
44 | #include "util.h" | |
b6e676ce LP |
45 | |
46 | struct RawImport { | |
47 | sd_event *event; | |
48 | ||
49 | char *image_root; | |
50 | ||
51 | RawImportFinished on_finished; | |
52 | void *userdata; | |
53 | ||
54 | char *local; | |
55 | bool force_local; | |
56 | bool read_only; | |
57 | bool grow_machine_directory; | |
58 | ||
59 | char *temp_path; | |
60 | char *final_path; | |
61 | ||
62 | int input_fd; | |
63 | int output_fd; | |
64 | ||
65 | ImportCompress compress; | |
66 | ||
67 | uint64_t written_since_last_grow; | |
68 | ||
69 | sd_event_source *input_event_source; | |
70 | ||
71 | uint8_t buffer[16*1024]; | |
72 | size_t buffer_size; | |
73 | ||
74 | uint64_t written_compressed; | |
75 | uint64_t written_uncompressed; | |
76 | ||
77 | struct stat st; | |
78 | ||
79 | unsigned last_percent; | |
80 | RateLimit progress_rate_limit; | |
81 | }; | |
82 | ||
83 | RawImport* raw_import_unref(RawImport *i) { | |
84 | if (!i) | |
85 | return NULL; | |
86 | ||
87 | sd_event_unref(i->event); | |
88 | ||
89 | if (i->temp_path) { | |
90 | (void) unlink(i->temp_path); | |
91 | free(i->temp_path); | |
92 | } | |
93 | ||
94 | import_compress_free(&i->compress); | |
95 | ||
96 | sd_event_source_unref(i->input_event_source); | |
97 | ||
98 | safe_close(i->output_fd); | |
99 | ||
100 | free(i->final_path); | |
101 | free(i->image_root); | |
102 | free(i->local); | |
103 | free(i); | |
104 | ||
105 | return NULL; | |
106 | } | |
107 | ||
108 | int raw_import_new( | |
109 | RawImport **ret, | |
110 | sd_event *event, | |
111 | const char *image_root, | |
112 | RawImportFinished on_finished, | |
113 | void *userdata) { | |
114 | ||
115 | _cleanup_(raw_import_unrefp) RawImport *i = NULL; | |
116 | int r; | |
117 | ||
118 | assert(ret); | |
119 | ||
120 | i = new0(RawImport, 1); | |
121 | if (!i) | |
122 | return -ENOMEM; | |
123 | ||
124 | i->input_fd = i->output_fd = -1; | |
125 | i->on_finished = on_finished; | |
126 | i->userdata = userdata; | |
127 | ||
587fec42 | 128 | RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1); |
b6e676ce LP |
129 | i->last_percent = (unsigned) -1; |
130 | ||
131 | i->image_root = strdup(image_root ?: "/var/lib/machines"); | |
132 | if (!i->image_root) | |
133 | return -ENOMEM; | |
134 | ||
135 | i->grow_machine_directory = path_startswith(i->image_root, "/var/lib/machines"); | |
136 | ||
137 | if (event) | |
138 | i->event = sd_event_ref(event); | |
139 | else { | |
140 | r = sd_event_default(&i->event); | |
141 | if (r < 0) | |
142 | return r; | |
143 | } | |
144 | ||
145 | *ret = i; | |
146 | i = NULL; | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static void raw_import_report_progress(RawImport *i) { | |
152 | unsigned percent; | |
153 | assert(i); | |
154 | ||
155 | /* We have no size information, unless the source is a regular file */ | |
156 | if (!S_ISREG(i->st.st_mode)) | |
157 | return; | |
158 | ||
159 | if (i->written_compressed >= (uint64_t) i->st.st_size) | |
160 | percent = 100; | |
161 | else | |
162 | percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->st.st_size); | |
163 | ||
164 | if (percent == i->last_percent) | |
165 | return; | |
166 | ||
167 | if (!ratelimit_test(&i->progress_rate_limit)) | |
168 | return; | |
169 | ||
170 | sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent); | |
171 | log_info("Imported %u%%.", percent); | |
172 | ||
173 | i->last_percent = percent; | |
174 | } | |
175 | ||
176 | static int raw_import_maybe_convert_qcow2(RawImport *i) { | |
177 | _cleanup_close_ int converted_fd = -1; | |
178 | _cleanup_free_ char *t = NULL; | |
179 | int r; | |
180 | ||
181 | assert(i); | |
182 | ||
183 | r = qcow2_detect(i->output_fd); | |
184 | if (r < 0) | |
185 | return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m"); | |
186 | if (r == 0) | |
187 | return 0; | |
188 | ||
189 | /* This is a QCOW2 image, let's convert it */ | |
14bcf25c | 190 | r = tempfn_random(i->final_path, NULL, &t); |
b6e676ce LP |
191 | if (r < 0) |
192 | return log_oom(); | |
193 | ||
194 | converted_fd = open(t, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); | |
195 | if (converted_fd < 0) | |
196 | return log_error_errno(errno, "Failed to create %s: %m", t); | |
197 | ||
1ed8f8c1 | 198 | r = chattr_fd(converted_fd, FS_NOCOW_FL, FS_NOCOW_FL); |
b6e676ce | 199 | if (r < 0) |
709f6e46 | 200 | log_warning_errno(r, "Failed to set file attributes on %s: %m", t); |
b6e676ce LP |
201 | |
202 | log_info("Unpacking QCOW2 file."); | |
203 | ||
204 | r = qcow2_convert(i->output_fd, converted_fd); | |
205 | if (r < 0) { | |
206 | unlink(t); | |
207 | return log_error_errno(r, "Failed to convert qcow2 image: %m"); | |
208 | } | |
209 | ||
210 | (void) unlink(i->temp_path); | |
211 | free(i->temp_path); | |
212 | i->temp_path = t; | |
213 | t = NULL; | |
214 | ||
215 | safe_close(i->output_fd); | |
216 | i->output_fd = converted_fd; | |
217 | converted_fd = -1; | |
218 | ||
219 | return 1; | |
220 | } | |
221 | ||
222 | static int raw_import_finish(RawImport *i) { | |
223 | int r; | |
224 | ||
225 | assert(i); | |
226 | assert(i->output_fd >= 0); | |
227 | assert(i->temp_path); | |
228 | assert(i->final_path); | |
229 | ||
230 | /* In case this was a sparse file, make sure the file system is right */ | |
231 | if (i->written_uncompressed > 0) { | |
232 | if (ftruncate(i->output_fd, i->written_uncompressed) < 0) | |
233 | return log_error_errno(errno, "Failed to truncate file: %m"); | |
234 | } | |
235 | ||
236 | r = raw_import_maybe_convert_qcow2(i); | |
237 | if (r < 0) | |
238 | return r; | |
239 | ||
240 | if (S_ISREG(i->st.st_mode)) { | |
241 | (void) copy_times(i->input_fd, i->output_fd); | |
242 | (void) copy_xattr(i->input_fd, i->output_fd); | |
243 | } | |
244 | ||
245 | if (i->read_only) { | |
246 | r = import_make_read_only_fd(i->output_fd); | |
247 | if (r < 0) | |
248 | return r; | |
249 | } | |
250 | ||
d9e2daaf LP |
251 | if (i->force_local) |
252 | (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); | |
b6e676ce | 253 | |
f85ef957 AC |
254 | r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path); |
255 | if (r < 0) | |
256 | return log_error_errno(r, "Failed to move image into place: %m"); | |
b6e676ce | 257 | |
a1e58e8e | 258 | i->temp_path = mfree(i->temp_path); |
b6e676ce LP |
259 | |
260 | return 0; | |
261 | } | |
262 | ||
263 | static int raw_import_open_disk(RawImport *i) { | |
264 | int r; | |
265 | ||
266 | assert(i); | |
267 | ||
268 | assert(!i->final_path); | |
269 | assert(!i->temp_path); | |
270 | assert(i->output_fd < 0); | |
271 | ||
272 | i->final_path = strjoin(i->image_root, "/", i->local, ".raw", NULL); | |
273 | if (!i->final_path) | |
274 | return log_oom(); | |
275 | ||
14bcf25c | 276 | r = tempfn_random(i->final_path, NULL, &i->temp_path); |
b6e676ce LP |
277 | if (r < 0) |
278 | return log_oom(); | |
279 | ||
280 | (void) mkdir_parents_label(i->temp_path, 0700); | |
281 | ||
282 | i->output_fd = open(i->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); | |
283 | if (i->output_fd < 0) | |
284 | return log_error_errno(errno, "Failed to open destination %s: %m", i->temp_path); | |
285 | ||
1ed8f8c1 | 286 | r = chattr_fd(i->output_fd, FS_NOCOW_FL, FS_NOCOW_FL); |
b6e676ce | 287 | if (r < 0) |
709f6e46 | 288 | log_warning_errno(r, "Failed to set file attributes on %s: %m", i->temp_path); |
b6e676ce LP |
289 | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static int raw_import_try_reflink(RawImport *i) { | |
294 | off_t p; | |
295 | int r; | |
296 | ||
297 | assert(i); | |
298 | assert(i->input_fd >= 0); | |
299 | assert(i->output_fd >= 0); | |
300 | ||
301 | if (i->compress.type != IMPORT_COMPRESS_UNCOMPRESSED) | |
302 | return 0; | |
303 | ||
304 | if (!S_ISREG(i->st.st_mode)) | |
305 | return 0; | |
306 | ||
307 | p = lseek(i->input_fd, 0, SEEK_CUR); | |
308 | if (p == (off_t) -1) | |
309 | return log_error_errno(errno, "Failed to read file offset of input file: %m"); | |
310 | ||
311 | /* Let's only try a btrfs reflink, if we are reading from the beginning of the file */ | |
312 | if ((uint64_t) p != (uint64_t) i->buffer_size) | |
313 | return 0; | |
314 | ||
315 | r = btrfs_reflink(i->input_fd, i->output_fd); | |
316 | if (r >= 0) | |
317 | return 1; | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
322 | static int raw_import_write(const void *p, size_t sz, void *userdata) { | |
323 | RawImport *i = userdata; | |
324 | ssize_t n; | |
325 | ||
326 | if (i->grow_machine_directory && i->written_since_last_grow >= GROW_INTERVAL_BYTES) { | |
327 | i->written_since_last_grow = 0; | |
328 | grow_machine_directory(); | |
329 | } | |
330 | ||
331 | n = sparse_write(i->output_fd, p, sz, 64); | |
332 | if (n < 0) | |
333 | return -errno; | |
334 | if ((size_t) n < sz) | |
335 | return -EIO; | |
336 | ||
337 | i->written_uncompressed += sz; | |
338 | i->written_since_last_grow += sz; | |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
343 | static int raw_import_process(RawImport *i) { | |
344 | ssize_t l; | |
345 | int r; | |
346 | ||
347 | assert(i); | |
348 | assert(i->buffer_size < sizeof(i->buffer)); | |
349 | ||
350 | l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size); | |
351 | if (l < 0) { | |
587fec42 LP |
352 | if (errno == EAGAIN) |
353 | return 0; | |
354 | ||
b6e676ce LP |
355 | r = log_error_errno(errno, "Failed to read input file: %m"); |
356 | goto finish; | |
357 | } | |
358 | if (l == 0) { | |
359 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
360 | log_error("Premature end of file: %m"); | |
361 | r = -EIO; | |
362 | goto finish; | |
363 | } | |
364 | ||
365 | r = raw_import_finish(i); | |
366 | goto finish; | |
367 | } | |
368 | ||
369 | i->buffer_size += l; | |
370 | ||
371 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
372 | r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size); | |
373 | if (r < 0) { | |
374 | log_error("Failed to detect file compression: %m"); | |
375 | goto finish; | |
376 | } | |
377 | if (r == 0) /* Need more data */ | |
378 | return 0; | |
379 | ||
380 | r = raw_import_open_disk(i); | |
381 | if (r < 0) | |
382 | goto finish; | |
383 | ||
384 | r = raw_import_try_reflink(i); | |
385 | if (r < 0) | |
386 | goto finish; | |
387 | if (r > 0) { | |
388 | r = raw_import_finish(i); | |
389 | goto finish; | |
390 | } | |
391 | } | |
392 | ||
393 | r = import_uncompress(&i->compress, i->buffer, i->buffer_size, raw_import_write, i); | |
394 | if (r < 0) { | |
395 | log_error_errno(r, "Failed to decode and write: %m"); | |
396 | goto finish; | |
397 | } | |
398 | ||
399 | i->written_compressed += i->buffer_size; | |
400 | i->buffer_size = 0; | |
401 | ||
402 | raw_import_report_progress(i); | |
403 | ||
404 | return 0; | |
405 | ||
406 | finish: | |
407 | if (i->on_finished) | |
408 | i->on_finished(i, r, i->userdata); | |
409 | else | |
410 | sd_event_exit(i->event, r); | |
411 | ||
412 | return 0; | |
413 | } | |
414 | ||
415 | static int raw_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
416 | RawImport *i = userdata; | |
417 | ||
418 | return raw_import_process(i); | |
419 | } | |
420 | ||
421 | static int raw_import_on_defer(sd_event_source *s, void *userdata) { | |
422 | RawImport *i = userdata; | |
423 | ||
424 | return raw_import_process(i); | |
425 | } | |
426 | ||
427 | int raw_import_start(RawImport *i, int fd, const char *local, bool force_local, bool read_only) { | |
428 | int r; | |
429 | ||
430 | assert(i); | |
431 | assert(fd >= 0); | |
432 | assert(local); | |
433 | ||
434 | if (!machine_name_is_valid(local)) | |
435 | return -EINVAL; | |
436 | ||
437 | if (i->input_fd >= 0) | |
438 | return -EBUSY; | |
439 | ||
587fec42 LP |
440 | r = fd_nonblock(fd, true); |
441 | if (r < 0) | |
442 | return r; | |
443 | ||
b6e676ce LP |
444 | r = free_and_strdup(&i->local, local); |
445 | if (r < 0) | |
446 | return r; | |
447 | i->force_local = force_local; | |
448 | i->read_only = read_only; | |
449 | ||
450 | if (fstat(fd, &i->st) < 0) | |
451 | return -errno; | |
452 | ||
453 | r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, raw_import_on_input, i); | |
454 | if (r == -EPERM) { | |
455 | /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */ | |
456 | r = sd_event_add_defer(i->event, &i->input_event_source, raw_import_on_defer, i); | |
457 | if (r < 0) | |
458 | return r; | |
459 | ||
460 | r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON); | |
461 | } | |
462 | if (r < 0) | |
463 | return r; | |
464 | ||
465 | i->input_fd = fd; | |
466 | return r; | |
467 | } |