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90199220 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2014 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
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 | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <sys/xattr.h> | |
dfd1520d | 23 | #include <linux/fs.h> |
90199220 | 24 | #include <curl/curl.h> |
49bb233b | 25 | #include <lzma.h> |
90199220 LP |
26 | |
27 | #include "hashmap.h" | |
28 | #include "utf8.h" | |
29 | #include "curl-util.h" | |
edce2aed | 30 | #include "qcow2-util.h" |
aceac2f0 | 31 | #include "import-raw.h" |
8620a9a3 LP |
32 | #include "strv.h" |
33 | #include "copy.h" | |
90199220 | 34 | |
aceac2f0 | 35 | typedef struct RawImportFile RawImportFile; |
90199220 | 36 | |
aceac2f0 LP |
37 | struct RawImportFile { |
38 | RawImport *import; | |
90199220 LP |
39 | |
40 | char *url; | |
41 | char *local; | |
42 | ||
43 | CURL *curl; | |
44 | struct curl_slist *request_header; | |
45 | ||
46 | char *temp_path; | |
47 | char *final_path; | |
48 | char *etag; | |
8620a9a3 | 49 | char **old_etags; |
90199220 LP |
50 | |
51 | uint64_t content_length; | |
49bb233b LP |
52 | uint64_t written_compressed; |
53 | uint64_t written_uncompressed; | |
54 | ||
55 | void *payload; | |
56 | size_t payload_size; | |
90199220 | 57 | |
5fa89b2c | 58 | usec_t mtime; |
90199220 LP |
59 | |
60 | bool force_local; | |
61 | bool done; | |
62 | ||
63 | int disk_fd; | |
49bb233b LP |
64 | |
65 | lzma_stream lzma; | |
66 | bool compressed; | |
90199220 LP |
67 | }; |
68 | ||
aceac2f0 | 69 | struct RawImport { |
90199220 LP |
70 | sd_event *event; |
71 | CurlGlue *glue; | |
72 | ||
087682d1 | 73 | char *image_root; |
90199220 LP |
74 | Hashmap *files; |
75 | ||
aceac2f0 | 76 | raw_import_on_finished on_finished; |
90199220 LP |
77 | void *userdata; |
78 | ||
79 | bool finished; | |
80 | }; | |
81 | ||
8620a9a3 LP |
82 | #define FILENAME_ESCAPE "/.#\"\'" |
83 | ||
49bb233b LP |
84 | #define RAW_MAX_SIZE (1024LLU*1024LLU*1024LLU*8) /* 8 GB */ |
85 | ||
aceac2f0 | 86 | static RawImportFile *raw_import_file_unref(RawImportFile *f) { |
90199220 LP |
87 | if (!f) |
88 | return NULL; | |
89 | ||
90 | if (f->import) | |
91 | curl_glue_remove_and_free(f->import->glue, f->curl); | |
92 | curl_slist_free_all(f->request_header); | |
93 | ||
94 | safe_close(f->disk_fd); | |
95 | ||
96 | free(f->final_path); | |
97 | ||
98 | if (f->temp_path) { | |
99 | unlink(f->temp_path); | |
100 | free(f->temp_path); | |
101 | } | |
102 | ||
103 | free(f->url); | |
104 | free(f->local); | |
105 | free(f->etag); | |
8620a9a3 | 106 | strv_free(f->old_etags); |
49bb233b | 107 | free(f->payload); |
90199220 LP |
108 | free(f); |
109 | ||
110 | return NULL; | |
111 | } | |
112 | ||
aceac2f0 | 113 | DEFINE_TRIVIAL_CLEANUP_FUNC(RawImportFile*, raw_import_file_unref); |
90199220 | 114 | |
aceac2f0 | 115 | static void raw_import_finish(RawImport *import, int error) { |
90199220 LP |
116 | assert(import); |
117 | ||
118 | if (import->finished) | |
119 | return; | |
120 | ||
121 | import->finished = true; | |
122 | ||
123 | if (import->on_finished) | |
124 | import->on_finished(import, error, import->userdata); | |
125 | else | |
126 | sd_event_exit(import->event, error); | |
127 | } | |
128 | ||
aceac2f0 | 129 | static int raw_import_file_make_final_path(RawImportFile *f) { |
8620a9a3 LP |
130 | _cleanup_free_ char *escaped_url = NULL, *escaped_etag = NULL; |
131 | ||
132 | assert(f); | |
133 | ||
134 | if (f->final_path) | |
135 | return 0; | |
136 | ||
137 | escaped_url = xescape(f->url, FILENAME_ESCAPE); | |
138 | if (!escaped_url) | |
139 | return -ENOMEM; | |
140 | ||
141 | if (f->etag) { | |
142 | escaped_etag = xescape(f->etag, FILENAME_ESCAPE); | |
143 | if (!escaped_etag) | |
144 | return -ENOMEM; | |
145 | ||
aceac2f0 | 146 | f->final_path = strjoin(f->import->image_root, "/.raw-", escaped_url, ".", escaped_etag, ".raw", NULL); |
8620a9a3 | 147 | } else |
aceac2f0 | 148 | f->final_path = strjoin(f->import->image_root, "/.raw-", escaped_url, ".raw", NULL); |
8620a9a3 LP |
149 | if (!f->final_path) |
150 | return -ENOMEM; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
aceac2f0 | 155 | static void raw_import_file_success(RawImportFile *f) { |
8620a9a3 LP |
156 | int r; |
157 | ||
158 | assert(f); | |
159 | ||
160 | f->done = true; | |
161 | ||
162 | if (f->local) { | |
163 | _cleanup_free_ char *tp = NULL; | |
164 | _cleanup_close_ int dfd = -1; | |
165 | const char *p; | |
166 | ||
167 | if (f->disk_fd >= 0) { | |
168 | if (lseek(f->disk_fd, SEEK_SET, 0) == (off_t) -1) { | |
169 | r = log_error_errno(errno, "Failed to seek to beginning of vendor image: %m"); | |
170 | goto finish; | |
171 | } | |
172 | } else { | |
aceac2f0 | 173 | r = raw_import_file_make_final_path(f); |
8620a9a3 LP |
174 | if (r < 0) { |
175 | log_oom(); | |
176 | goto finish; | |
177 | } | |
178 | ||
179 | f->disk_fd = open(f->final_path, O_RDONLY|O_NOCTTY|O_CLOEXEC); | |
180 | if (f->disk_fd < 0) { | |
dfd1520d | 181 | r = log_error_errno(errno, "Failed to open vendor image: %m"); |
8620a9a3 LP |
182 | goto finish; |
183 | } | |
184 | } | |
185 | ||
aceac2f0 | 186 | p = strappenda(f->import->image_root, "/", f->local, ".raw"); |
8620a9a3 LP |
187 | if (f->force_local) |
188 | (void) rm_rf_dangerous(p, false, true, false); | |
189 | ||
190 | r = tempfn_random(p, &tp); | |
191 | if (r < 0) { | |
192 | log_oom(); | |
193 | goto finish; | |
194 | } | |
195 | ||
196 | dfd = open(tp, O_WRONLY|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0664); | |
197 | if (dfd < 0) { | |
198 | r = log_error_errno(errno, "Failed to create writable copy of image: %m"); | |
199 | goto finish; | |
200 | } | |
201 | ||
dfd1520d LP |
202 | /* Turn off COW writing. This should greatly improve |
203 | * performance on COW file systems like btrfs, since it | |
204 | * reduces fragmentation caused by not allowing in-place | |
205 | * writes. */ | |
206 | r = chattr_fd(dfd, true, FS_NOCOW_FL); | |
207 | if (r < 0) | |
47bc4fd8 | 208 | log_warning_errno(errno, "Failed to set file attributes on %s: %m", tp); |
dfd1520d | 209 | |
8620a9a3 LP |
210 | r = copy_bytes(f->disk_fd, dfd, (off_t) -1, true); |
211 | if (r < 0) { | |
212 | log_error_errno(r, "Failed to make writable copy of image: %m"); | |
213 | unlink(tp); | |
214 | goto finish; | |
215 | } | |
216 | ||
217 | (void) copy_times(f->disk_fd, dfd); | |
218 | (void) copy_xattr(f->disk_fd, dfd); | |
219 | ||
220 | dfd = safe_close(dfd); | |
221 | ||
222 | r = rename(tp, p); | |
223 | if (r < 0) { | |
224 | r = log_error_errno(errno, "Failed to move writable image into place: %m"); | |
225 | unlink(tp); | |
226 | goto finish; | |
227 | } | |
228 | ||
229 | log_info("Created new local image %s.", p); | |
230 | } | |
231 | ||
232 | f->disk_fd = safe_close(f->disk_fd); | |
233 | r = 0; | |
234 | ||
235 | finish: | |
aceac2f0 | 236 | raw_import_finish(f->import, r); |
8620a9a3 LP |
237 | } |
238 | ||
edce2aed LP |
239 | static int raw_import_maybe_convert_qcow2(RawImportFile *f) { |
240 | _cleanup_close_ int converted_fd = -1; | |
241 | _cleanup_free_ char *t = NULL; | |
242 | int r; | |
243 | ||
244 | assert(f); | |
245 | assert(f->disk_fd); | |
246 | assert(f->temp_path); | |
247 | ||
248 | r = qcow2_detect(f->disk_fd); | |
249 | if (r < 0) | |
250 | return log_error_errno(r, "Failed to detect whether this is a QCOW2 image: %m"); | |
251 | if (r == 0) | |
252 | return 0; | |
253 | ||
254 | /* This is a QCOW2 image, let's convert it */ | |
255 | r = tempfn_random(f->final_path, &t); | |
256 | if (r < 0) | |
257 | return log_oom(); | |
258 | ||
259 | converted_fd = open(t, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0644); | |
260 | if (converted_fd < 0) | |
261 | return log_error_errno(errno, "Failed to create %s: %m", t); | |
262 | ||
263 | r = qcow2_convert(f->disk_fd, converted_fd); | |
264 | if (r < 0) { | |
265 | unlink(t); | |
266 | return log_error_errno(r, "Failed to convert qcow2 image: %m"); | |
267 | } | |
268 | ||
269 | unlink(f->temp_path); | |
270 | free(f->temp_path); | |
271 | ||
272 | f->temp_path = t; | |
273 | t = NULL; | |
274 | ||
275 | safe_close(f->disk_fd); | |
276 | f->disk_fd = converted_fd; | |
277 | converted_fd = -1; | |
278 | ||
279 | return 1; | |
280 | } | |
281 | ||
aceac2f0 LP |
282 | static void raw_import_curl_on_finished(CurlGlue *g, CURL *curl, CURLcode result) { |
283 | RawImportFile *f = NULL; | |
90199220 LP |
284 | struct stat st; |
285 | CURLcode code; | |
286 | long status; | |
287 | int r; | |
288 | ||
289 | if (curl_easy_getinfo(curl, CURLINFO_PRIVATE, &f) != CURLE_OK) | |
290 | return; | |
291 | ||
8620a9a3 | 292 | if (!f || f->done) |
90199220 LP |
293 | return; |
294 | ||
295 | f->done = true; | |
296 | ||
297 | if (result != CURLE_OK) { | |
298 | log_error("Transfer failed: %s", curl_easy_strerror(result)); | |
299 | r = -EIO; | |
300 | goto fail; | |
301 | } | |
302 | ||
303 | code = curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &status); | |
304 | if (code != CURLE_OK) { | |
305 | log_error("Failed to retrieve response code: %s", curl_easy_strerror(code)); | |
306 | r = -EIO; | |
307 | goto fail; | |
308 | } else if (status == 304) { | |
8620a9a3 | 309 | log_info("Image already downloaded. Skipping download."); |
aceac2f0 | 310 | raw_import_file_success(f); |
8620a9a3 | 311 | return; |
90199220 LP |
312 | } else if (status >= 300) { |
313 | log_error("HTTP request to %s failed with code %li.", f->url, status); | |
314 | r = -EIO; | |
315 | goto fail; | |
316 | } else if (status < 200) { | |
317 | log_error("HTTP request to %s finished with unexpected code %li.", f->url, status); | |
318 | r = -EIO; | |
319 | goto fail; | |
320 | } | |
321 | ||
322 | if (f->disk_fd < 0) { | |
323 | log_error("No data received."); | |
324 | r = -EIO; | |
325 | goto fail; | |
326 | } | |
327 | ||
328 | if (f->content_length != (uint64_t) -1 && | |
49bb233b | 329 | f->content_length != f->written_compressed) { |
90199220 LP |
330 | log_error("Download truncated."); |
331 | r = -EIO; | |
332 | goto fail; | |
333 | } | |
334 | ||
ff6a7460 LP |
335 | /* Make sure the file size is right, in case the file was |
336 | * sparse and we just seeked for the last part */ | |
337 | if (ftruncate(f->disk_fd, f->written_uncompressed) < 0) { | |
338 | log_error_errno(errno, "Failed to truncate file: %m"); | |
339 | r = -errno; | |
340 | goto fail; | |
341 | } | |
342 | ||
edce2aed LP |
343 | r = raw_import_maybe_convert_qcow2(f); |
344 | if (r < 0) | |
345 | goto fail; | |
346 | ||
90199220 | 347 | if (f->etag) |
8620a9a3 LP |
348 | (void) fsetxattr(f->disk_fd, "user.source_etag", f->etag, strlen(f->etag), 0); |
349 | if (f->url) | |
350 | (void) fsetxattr(f->disk_fd, "user.source_url", f->url, strlen(f->url), 0); | |
90199220 LP |
351 | |
352 | if (f->mtime != 0) { | |
353 | struct timespec ut[2]; | |
354 | ||
5fa89b2c | 355 | timespec_store(&ut[0], f->mtime); |
90199220 | 356 | ut[1] = ut[0]; |
90199220 | 357 | (void) futimens(f->disk_fd, ut); |
10f9c755 LP |
358 | |
359 | fd_setcrtime(f->disk_fd, f->mtime); | |
90199220 LP |
360 | } |
361 | ||
362 | if (fstat(f->disk_fd, &st) < 0) { | |
363 | r = log_error_errno(errno, "Failed to stat file: %m"); | |
364 | goto fail; | |
365 | } | |
366 | ||
367 | /* Mark read-only */ | |
368 | (void) fchmod(f->disk_fd, st.st_mode & 07444); | |
369 | ||
90199220 LP |
370 | assert(f->temp_path); |
371 | assert(f->final_path); | |
372 | ||
373 | r = rename(f->temp_path, f->final_path); | |
374 | if (r < 0) { | |
aceac2f0 | 375 | r = log_error_errno(errno, "Failed to move RAW file into place: %m"); |
90199220 LP |
376 | goto fail; |
377 | } | |
378 | ||
8620a9a3 LP |
379 | free(f->temp_path); |
380 | f->temp_path = NULL; | |
381 | ||
382 | log_info("Completed writing vendor image %s.", f->final_path); | |
383 | ||
aceac2f0 | 384 | raw_import_file_success(f); |
8620a9a3 | 385 | return; |
90199220 LP |
386 | |
387 | fail: | |
aceac2f0 | 388 | raw_import_finish(f->import, r); |
90199220 LP |
389 | } |
390 | ||
aceac2f0 | 391 | static int raw_import_file_open_disk_for_write(RawImportFile *f) { |
90199220 LP |
392 | int r; |
393 | ||
394 | assert(f); | |
395 | ||
396 | if (f->disk_fd >= 0) | |
397 | return 0; | |
398 | ||
aceac2f0 | 399 | r = raw_import_file_make_final_path(f); |
8620a9a3 LP |
400 | if (r < 0) |
401 | return log_oom(); | |
90199220 LP |
402 | |
403 | if (!f->temp_path) { | |
404 | r = tempfn_random(f->final_path, &f->temp_path); | |
405 | if (r < 0) | |
406 | return log_oom(); | |
407 | } | |
408 | ||
8620a9a3 | 409 | f->disk_fd = open(f->temp_path, O_RDWR|O_CREAT|O_EXCL|O_NOCTTY|O_CLOEXEC, 0644); |
90199220 LP |
410 | if (f->disk_fd < 0) |
411 | return log_error_errno(errno, "Failed to create %s: %m", f->temp_path); | |
412 | ||
47bc4fd8 LP |
413 | r = chattr_fd(f->disk_fd, true, FS_NOCOW_FL); |
414 | if (r < 0) | |
415 | log_warning_errno(errno, "Failed to set file attributes on %s: %m", f->temp_path); | |
416 | ||
90199220 LP |
417 | return 0; |
418 | } | |
419 | ||
49bb233b | 420 | static int raw_import_file_write_uncompressed(RawImportFile *f, void *p, size_t sz) { |
90199220 | 421 | ssize_t n; |
90199220 | 422 | |
90199220 | 423 | assert(f); |
49bb233b LP |
424 | assert(p); |
425 | assert(sz > 0); | |
426 | assert(f->disk_fd >= 0); | |
90199220 | 427 | |
49bb233b LP |
428 | if (f->written_uncompressed + sz < f->written_uncompressed) { |
429 | log_error("File too large, overflow"); | |
430 | return -EOVERFLOW; | |
8620a9a3 LP |
431 | } |
432 | ||
49bb233b LP |
433 | if (f->written_uncompressed + sz > RAW_MAX_SIZE) { |
434 | log_error("File overly large, refusing"); | |
435 | return -EFBIG; | |
436 | } | |
437 | ||
ff6a7460 | 438 | n = sparse_write(f->disk_fd, p, sz, 64); |
49bb233b LP |
439 | if (n < 0) { |
440 | log_error_errno(errno, "Failed to write file: %m"); | |
441 | return -errno; | |
442 | } | |
443 | if ((size_t) n < sz) { | |
444 | log_error("Short write"); | |
445 | return -EIO; | |
446 | } | |
90199220 | 447 | |
49bb233b LP |
448 | f->written_uncompressed += sz; |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static int raw_import_file_write_compressed(RawImportFile *f, void *p, size_t sz) { | |
454 | int r; | |
455 | ||
456 | assert(f); | |
457 | assert(p); | |
458 | assert(sz > 0); | |
459 | assert(f->disk_fd >= 0); | |
460 | ||
461 | if (f->written_compressed + sz < f->written_compressed) { | |
90199220 | 462 | log_error("File too large, overflow"); |
49bb233b | 463 | return -EOVERFLOW; |
90199220 LP |
464 | } |
465 | ||
466 | if (f->content_length != (uint64_t) -1 && | |
49bb233b | 467 | f->written_compressed + sz > f->content_length) { |
90199220 | 468 | log_error("Content length incorrect."); |
49bb233b | 469 | return -EFBIG; |
90199220 LP |
470 | } |
471 | ||
49bb233b LP |
472 | if (!f->compressed) { |
473 | r = raw_import_file_write_uncompressed(f, p, sz); | |
474 | if (r < 0) | |
475 | return r; | |
476 | } else { | |
477 | f->lzma.next_in = p; | |
478 | f->lzma.avail_in = sz; | |
479 | ||
480 | while (f->lzma.avail_in > 0) { | |
481 | uint8_t buffer[16 * 1024]; | |
482 | lzma_ret lzr; | |
483 | ||
484 | f->lzma.next_out = buffer; | |
485 | f->lzma.avail_out = sizeof(buffer); | |
486 | ||
487 | lzr = lzma_code(&f->lzma, LZMA_RUN); | |
488 | if (lzr != LZMA_OK && lzr != LZMA_STREAM_END) { | |
489 | log_error("Decompression error."); | |
490 | return -EIO; | |
491 | } | |
492 | ||
493 | r = raw_import_file_write_uncompressed(f, buffer, sizeof(buffer) - f->lzma.avail_out); | |
494 | if (r < 0) | |
495 | return r; | |
496 | } | |
90199220 LP |
497 | } |
498 | ||
49bb233b LP |
499 | f->written_compressed += sz; |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | static int raw_import_file_detect_xz(RawImportFile *f) { | |
505 | static const uint8_t xz_signature[] = { | |
506 | '\xfd', '7', 'z', 'X', 'Z', '\x00' | |
507 | }; | |
508 | lzma_ret lzr; | |
509 | int r; | |
510 | ||
511 | assert(f); | |
512 | ||
513 | if (f->payload_size < sizeof(xz_signature)) | |
514 | return 0; | |
515 | ||
516 | f->compressed = memcmp(f->payload, xz_signature, sizeof(xz_signature)) == 0; | |
517 | log_debug("Stream is XZ compressed: %s", yes_no(f->compressed)); | |
518 | ||
519 | if (f->compressed) { | |
520 | lzr = lzma_stream_decoder(&f->lzma, UINT64_MAX, LZMA_TELL_UNSUPPORTED_CHECK); | |
521 | if (lzr != LZMA_OK) { | |
522 | log_error("Failed to initialize LZMA decoder."); | |
523 | return -EIO; | |
524 | } | |
525 | } | |
526 | ||
527 | r = raw_import_file_open_disk_for_write(f); | |
528 | if (r < 0) | |
529 | return r; | |
530 | ||
531 | r = raw_import_file_write_compressed(f, f->payload, f->payload_size); | |
532 | if (r < 0) | |
533 | return r; | |
534 | ||
535 | free(f->payload); | |
536 | f->payload = NULL; | |
537 | f->payload_size = 0; | |
538 | ||
539 | return 0; | |
540 | } | |
541 | ||
542 | static size_t raw_import_file_write_callback(void *contents, size_t size, size_t nmemb, void *userdata) { | |
543 | RawImportFile *f = userdata; | |
544 | size_t sz = size * nmemb; | |
545 | int r; | |
546 | ||
547 | assert(contents); | |
548 | assert(f); | |
549 | ||
550 | if (f->done) { | |
551 | r = -ESTALE; | |
90199220 LP |
552 | goto fail; |
553 | } | |
554 | ||
49bb233b LP |
555 | if (f->disk_fd < 0) { |
556 | uint8_t *p; | |
557 | ||
558 | /* We haven't opened the file yet, let's first check what it actually is */ | |
559 | ||
560 | p = realloc(f->payload, f->payload_size + sz); | |
561 | if (!p) { | |
562 | r = log_oom(); | |
563 | goto fail; | |
564 | } | |
565 | ||
566 | memcpy(p + f->payload_size, contents, sz); | |
567 | f->payload_size = sz; | |
568 | f->payload = p; | |
569 | ||
570 | r = raw_import_file_detect_xz(f); | |
571 | if (r < 0) | |
572 | goto fail; | |
573 | ||
574 | return sz; | |
575 | } | |
576 | ||
577 | r = raw_import_file_write_compressed(f, contents, sz); | |
578 | if (r < 0) | |
579 | goto fail; | |
90199220 LP |
580 | |
581 | return sz; | |
582 | ||
583 | fail: | |
aceac2f0 | 584 | raw_import_finish(f->import, r); |
90199220 LP |
585 | return 0; |
586 | } | |
587 | ||
aceac2f0 LP |
588 | static size_t raw_import_file_header_callback(void *contents, size_t size, size_t nmemb, void *userdata) { |
589 | RawImportFile *f = userdata; | |
90199220 LP |
590 | size_t sz = size * nmemb; |
591 | _cleanup_free_ char *length = NULL, *last_modified = NULL; | |
592 | char *etag; | |
593 | int r; | |
594 | ||
595 | assert(contents); | |
596 | assert(f); | |
597 | ||
8620a9a3 LP |
598 | if (f->done) { |
599 | r = -ESTALE; | |
600 | goto fail; | |
601 | } | |
602 | ||
90199220 LP |
603 | r = curl_header_strdup(contents, sz, "ETag:", &etag); |
604 | if (r < 0) { | |
605 | log_oom(); | |
606 | goto fail; | |
607 | } | |
608 | if (r > 0) { | |
609 | free(f->etag); | |
610 | f->etag = etag; | |
611 | ||
8620a9a3 LP |
612 | if (strv_contains(f->old_etags, f->etag)) { |
613 | log_info("Image already downloaded. Skipping download."); | |
aceac2f0 | 614 | raw_import_file_success(f); |
90199220 LP |
615 | return sz; |
616 | } | |
617 | ||
618 | return sz; | |
619 | } | |
620 | ||
621 | r = curl_header_strdup(contents, sz, "Content-Length:", &length); | |
622 | if (r < 0) { | |
623 | log_oom(); | |
624 | goto fail; | |
625 | } | |
626 | if (r > 0) { | |
627 | (void) safe_atou64(length, &f->content_length); | |
49bb233b LP |
628 | |
629 | if (f->content_length != (uint64_t) -1) { | |
630 | char bytes[FORMAT_BYTES_MAX]; | |
631 | log_info("Downloading %s.", format_bytes(bytes, sizeof(bytes), f->content_length)); | |
632 | } | |
633 | ||
90199220 LP |
634 | return sz; |
635 | } | |
636 | ||
637 | r = curl_header_strdup(contents, sz, "Last-Modified:", &last_modified); | |
638 | if (r < 0) { | |
639 | log_oom(); | |
640 | goto fail; | |
641 | } | |
642 | if (r > 0) { | |
643 | (void) curl_parse_http_time(last_modified, &f->mtime); | |
644 | return sz; | |
645 | } | |
646 | ||
647 | return sz; | |
648 | ||
649 | fail: | |
aceac2f0 | 650 | raw_import_finish(f->import, r); |
90199220 LP |
651 | return 0; |
652 | } | |
653 | ||
8620a9a3 LP |
654 | static bool etag_is_valid(const char *etag) { |
655 | ||
656 | if (!endswith(etag, "\"")) | |
657 | return false; | |
658 | ||
659 | if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) | |
660 | return false; | |
661 | ||
662 | return true; | |
663 | } | |
664 | ||
aceac2f0 | 665 | static int raw_import_file_find_old_etags(RawImportFile *f) { |
8620a9a3 LP |
666 | _cleanup_free_ char *escaped_url = NULL; |
667 | _cleanup_closedir_ DIR *d = NULL; | |
668 | struct dirent *de; | |
669 | int r; | |
670 | ||
671 | escaped_url = xescape(f->url, FILENAME_ESCAPE); | |
672 | if (!escaped_url) | |
673 | return -ENOMEM; | |
674 | ||
087682d1 | 675 | d = opendir(f->import->image_root); |
8620a9a3 LP |
676 | if (!d) { |
677 | if (errno == ENOENT) | |
678 | return 0; | |
679 | ||
680 | return -errno; | |
681 | } | |
682 | ||
683 | FOREACH_DIRENT_ALL(de, d, return -errno) { | |
684 | const char *a, *b; | |
685 | char *u; | |
686 | ||
687 | if (de->d_type != DT_UNKNOWN && | |
688 | de->d_type != DT_REG) | |
689 | continue; | |
690 | ||
aceac2f0 | 691 | a = startswith(de->d_name, ".raw-"); |
8620a9a3 LP |
692 | if (!a) |
693 | continue; | |
694 | ||
695 | a = startswith(a, escaped_url); | |
696 | if (!a) | |
697 | continue; | |
698 | ||
699 | a = startswith(a, "."); | |
700 | if (!a) | |
701 | continue; | |
702 | ||
aceac2f0 | 703 | b = endswith(de->d_name, ".raw"); |
8620a9a3 LP |
704 | if (!b) |
705 | continue; | |
706 | ||
707 | if (a >= b) | |
708 | continue; | |
709 | ||
710 | u = cunescape_length(a, b - a); | |
711 | if (!u) | |
712 | return -ENOMEM; | |
713 | ||
714 | if (!etag_is_valid(u)) { | |
715 | free(u); | |
716 | continue; | |
717 | } | |
718 | ||
719 | r = strv_consume(&f->old_etags, u); | |
720 | if (r < 0) | |
721 | return r; | |
722 | } | |
723 | ||
724 | return 0; | |
725 | } | |
726 | ||
aceac2f0 | 727 | static int raw_import_file_begin(RawImportFile *f) { |
90199220 LP |
728 | int r; |
729 | ||
730 | assert(f); | |
731 | assert(!f->curl); | |
732 | ||
733 | log_info("Getting %s.", f->url); | |
734 | ||
aceac2f0 | 735 | r = raw_import_file_find_old_etags(f); |
8620a9a3 LP |
736 | if (r < 0) |
737 | return r; | |
738 | ||
90199220 LP |
739 | r = curl_glue_make(&f->curl, f->url, f); |
740 | if (r < 0) | |
741 | return r; | |
742 | ||
8620a9a3 LP |
743 | if (!strv_isempty(f->old_etags)) { |
744 | _cleanup_free_ char *cc = NULL, *hdr = NULL; | |
90199220 | 745 | |
8620a9a3 LP |
746 | cc = strv_join(f->old_etags, ", "); |
747 | if (!cc) | |
748 | return -ENOMEM; | |
749 | ||
750 | hdr = strappend("If-None-Match: ", cc); | |
751 | if (!hdr) | |
752 | return -ENOMEM; | |
90199220 LP |
753 | |
754 | f->request_header = curl_slist_new(hdr, NULL); | |
755 | if (!f->request_header) | |
756 | return -ENOMEM; | |
757 | ||
758 | if (curl_easy_setopt(f->curl, CURLOPT_HTTPHEADER, f->request_header) != CURLE_OK) | |
759 | return -EIO; | |
760 | } | |
761 | ||
aceac2f0 | 762 | if (curl_easy_setopt(f->curl, CURLOPT_WRITEFUNCTION, raw_import_file_write_callback) != CURLE_OK) |
90199220 LP |
763 | return -EIO; |
764 | ||
765 | if (curl_easy_setopt(f->curl, CURLOPT_WRITEDATA, f) != CURLE_OK) | |
766 | return -EIO; | |
767 | ||
aceac2f0 | 768 | if (curl_easy_setopt(f->curl, CURLOPT_HEADERFUNCTION, raw_import_file_header_callback) != CURLE_OK) |
90199220 LP |
769 | return -EIO; |
770 | ||
771 | if (curl_easy_setopt(f->curl, CURLOPT_HEADERDATA, f) != CURLE_OK) | |
772 | return -EIO; | |
773 | ||
774 | r = curl_glue_add(f->import->glue, f->curl); | |
775 | if (r < 0) | |
776 | return r; | |
777 | ||
778 | return 0; | |
779 | } | |
780 | ||
aceac2f0 LP |
781 | int raw_import_new(RawImport **import, sd_event *event, const char *image_root, raw_import_on_finished on_finished, void *userdata) { |
782 | _cleanup_(raw_import_unrefp) RawImport *i = NULL; | |
90199220 LP |
783 | int r; |
784 | ||
785 | assert(import); | |
087682d1 | 786 | assert(image_root); |
90199220 | 787 | |
aceac2f0 | 788 | i = new0(RawImport, 1); |
90199220 LP |
789 | if (!i) |
790 | return -ENOMEM; | |
791 | ||
792 | i->on_finished = on_finished; | |
793 | i->userdata = userdata; | |
794 | ||
087682d1 LP |
795 | i->image_root = strdup(image_root); |
796 | if (!i->image_root) | |
797 | return -ENOMEM; | |
798 | ||
90199220 LP |
799 | if (event) |
800 | i->event = sd_event_ref(event); | |
801 | else { | |
802 | r = sd_event_default(&i->event); | |
803 | if (r < 0) | |
804 | return r; | |
805 | } | |
806 | ||
807 | r = curl_glue_new(&i->glue, i->event); | |
808 | if (r < 0) | |
809 | return r; | |
810 | ||
aceac2f0 | 811 | i->glue->on_finished = raw_import_curl_on_finished; |
90199220 LP |
812 | i->glue->userdata = i; |
813 | ||
814 | *import = i; | |
815 | i = NULL; | |
816 | ||
817 | return 0; | |
818 | } | |
819 | ||
aceac2f0 LP |
820 | RawImport* raw_import_unref(RawImport *import) { |
821 | RawImportFile *f; | |
90199220 LP |
822 | |
823 | if (!import) | |
824 | return NULL; | |
825 | ||
826 | while ((f = hashmap_steal_first(import->files))) | |
aceac2f0 | 827 | raw_import_file_unref(f); |
90199220 LP |
828 | hashmap_free(import->files); |
829 | ||
830 | curl_glue_unref(import->glue); | |
831 | sd_event_unref(import->event); | |
832 | ||
087682d1 | 833 | free(import->image_root); |
90199220 LP |
834 | free(import); |
835 | ||
836 | return NULL; | |
837 | } | |
838 | ||
aceac2f0 LP |
839 | int raw_import_cancel(RawImport *import, const char *url) { |
840 | RawImportFile *f; | |
90199220 LP |
841 | |
842 | assert(import); | |
843 | assert(url); | |
844 | ||
845 | f = hashmap_remove(import->files, url); | |
846 | if (!f) | |
847 | return 0; | |
848 | ||
aceac2f0 | 849 | raw_import_file_unref(f); |
90199220 LP |
850 | return 1; |
851 | } | |
852 | ||
aceac2f0 LP |
853 | int raw_import_pull(RawImport *import, const char *url, const char *local, bool force_local) { |
854 | _cleanup_(raw_import_file_unrefp) RawImportFile *f = NULL; | |
90199220 LP |
855 | int r; |
856 | ||
857 | assert(import); | |
aceac2f0 | 858 | assert(raw_url_is_valid(url)); |
8620a9a3 | 859 | assert(!local || machine_name_is_valid(local)); |
90199220 LP |
860 | |
861 | if (hashmap_get(import->files, url)) | |
862 | return -EEXIST; | |
863 | ||
864 | r = hashmap_ensure_allocated(&import->files, &string_hash_ops); | |
865 | if (r < 0) | |
866 | return r; | |
867 | ||
aceac2f0 | 868 | f = new0(RawImportFile, 1); |
90199220 LP |
869 | if (!f) |
870 | return -ENOMEM; | |
871 | ||
872 | f->import = import; | |
873 | f->disk_fd = -1; | |
874 | f->content_length = (uint64_t) -1; | |
875 | ||
876 | f->url = strdup(url); | |
877 | if (!f->url) | |
878 | return -ENOMEM; | |
879 | ||
8620a9a3 LP |
880 | if (local) { |
881 | f->local = strdup(local); | |
882 | if (!f->local) | |
90199220 | 883 | return -ENOMEM; |
8620a9a3 LP |
884 | |
885 | f->force_local = force_local; | |
90199220 LP |
886 | } |
887 | ||
888 | r = hashmap_put(import->files, f->url, f); | |
889 | if (r < 0) | |
890 | return r; | |
891 | ||
aceac2f0 | 892 | r = raw_import_file_begin(f); |
90199220 | 893 | if (r < 0) { |
aceac2f0 | 894 | raw_import_cancel(import, f->url); |
90199220 LP |
895 | f = NULL; |
896 | return r; | |
897 | } | |
898 | ||
899 | f = NULL; | |
900 | return 0; | |
901 | } | |
902 | ||
aceac2f0 | 903 | bool raw_url_is_valid(const char *url) { |
90199220 LP |
904 | if (isempty(url)) |
905 | return false; | |
906 | ||
907 | if (!startswith(url, "http://") && | |
908 | !startswith(url, "https://")) | |
909 | return false; | |
910 | ||
911 | return ascii_is_valid(url); | |
912 | } |