]>
Commit | Line | Data |
---|---|---|
53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
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" |
0d39fa9c | 12 | #include "fileio.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-tar.h" |
c004493c | 18 | #include "io-util.h" |
b6e676ce | 19 | #include "machine-pool.h" |
07630cea LP |
20 | #include "mkdir.h" |
21 | #include "path-util.h" | |
22 | #include "process-util.h" | |
b6e676ce | 23 | #include "qcow2-util.h" |
07630cea LP |
24 | #include "ratelimit.h" |
25 | #include "rm-rf.h" | |
26 | #include "string-util.h" | |
27 | #include "util.h" | |
b6e676ce LP |
28 | |
29 | struct TarImport { | |
30 | sd_event *event; | |
31 | ||
32 | char *image_root; | |
33 | ||
34 | TarImportFinished on_finished; | |
35 | void *userdata; | |
36 | ||
37 | char *local; | |
38 | bool force_local; | |
39 | bool read_only; | |
40 | bool grow_machine_directory; | |
41 | ||
42 | char *temp_path; | |
43 | char *final_path; | |
44 | ||
45 | int input_fd; | |
46 | int tar_fd; | |
47 | ||
48 | ImportCompress compress; | |
49 | ||
50 | uint64_t written_since_last_grow; | |
51 | ||
52 | sd_event_source *input_event_source; | |
53 | ||
54 | uint8_t buffer[16*1024]; | |
55 | size_t buffer_size; | |
56 | ||
57 | uint64_t written_compressed; | |
58 | uint64_t written_uncompressed; | |
59 | ||
60 | struct stat st; | |
61 | ||
62 | pid_t tar_pid; | |
63 | ||
64 | unsigned last_percent; | |
65 | RateLimit progress_rate_limit; | |
66 | }; | |
67 | ||
68 | TarImport* tar_import_unref(TarImport *i) { | |
69 | if (!i) | |
70 | return NULL; | |
71 | ||
587fec42 | 72 | sd_event_source_unref(i->input_event_source); |
b6e676ce LP |
73 | |
74 | if (i->tar_pid > 1) { | |
75 | (void) kill_and_sigcont(i->tar_pid, SIGKILL); | |
76 | (void) wait_for_terminate(i->tar_pid, NULL); | |
77 | } | |
78 | ||
79 | if (i->temp_path) { | |
d9e2daaf | 80 | (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); |
b6e676ce LP |
81 | free(i->temp_path); |
82 | } | |
83 | ||
84 | import_compress_free(&i->compress); | |
85 | ||
587fec42 | 86 | sd_event_unref(i->event); |
b6e676ce LP |
87 | |
88 | safe_close(i->tar_fd); | |
89 | ||
90 | free(i->final_path); | |
91 | free(i->image_root); | |
92 | free(i->local); | |
6b430fdb | 93 | return mfree(i); |
b6e676ce LP |
94 | } |
95 | ||
96 | int tar_import_new( | |
97 | TarImport **ret, | |
98 | sd_event *event, | |
99 | const char *image_root, | |
100 | TarImportFinished on_finished, | |
101 | void *userdata) { | |
102 | ||
103 | _cleanup_(tar_import_unrefp) TarImport *i = NULL; | |
0d94088e YW |
104 | _cleanup_free_ char *root = NULL; |
105 | bool grow; | |
b6e676ce LP |
106 | int r; |
107 | ||
108 | assert(ret); | |
109 | ||
0d94088e YW |
110 | root = strdup(image_root ?: "/var/lib/machines"); |
111 | if (!root) | |
b6e676ce LP |
112 | return -ENOMEM; |
113 | ||
0d94088e | 114 | grow = path_startswith(root, "/var/lib/machines"); |
b6e676ce | 115 | |
0d94088e YW |
116 | i = new(TarImport, 1); |
117 | if (!i) | |
b6e676ce LP |
118 | return -ENOMEM; |
119 | ||
0d94088e YW |
120 | *i = (TarImport) { |
121 | .input_fd = -1, | |
122 | .tar_fd = -1, | |
123 | .on_finished = on_finished, | |
124 | .userdata = userdata, | |
125 | .last_percent = (unsigned) -1, | |
126 | .image_root = TAKE_PTR(root), | |
127 | .grow_machine_directory = grow, | |
128 | }; | |
129 | ||
130 | RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1); | |
b6e676ce LP |
131 | |
132 | if (event) | |
133 | i->event = sd_event_ref(event); | |
134 | else { | |
135 | r = sd_event_default(&i->event); | |
136 | if (r < 0) | |
137 | return r; | |
138 | } | |
139 | ||
1cc6c93a | 140 | *ret = TAKE_PTR(i); |
b6e676ce LP |
141 | |
142 | return 0; | |
143 | } | |
144 | ||
145 | static void tar_import_report_progress(TarImport *i) { | |
146 | unsigned percent; | |
147 | assert(i); | |
148 | ||
149 | /* We have no size information, unless the source is a regular file */ | |
150 | if (!S_ISREG(i->st.st_mode)) | |
151 | return; | |
152 | ||
153 | if (i->written_compressed >= (uint64_t) i->st.st_size) | |
154 | percent = 100; | |
155 | else | |
156 | percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->st.st_size); | |
157 | ||
158 | if (percent == i->last_percent) | |
159 | return; | |
160 | ||
7994ac1d | 161 | if (!ratelimit_below(&i->progress_rate_limit)) |
b6e676ce LP |
162 | return; |
163 | ||
164 | sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent); | |
165 | log_info("Imported %u%%.", percent); | |
166 | ||
167 | i->last_percent = percent; | |
168 | } | |
169 | ||
170 | static int tar_import_finish(TarImport *i) { | |
171 | int r; | |
172 | ||
173 | assert(i); | |
174 | assert(i->tar_fd >= 0); | |
175 | assert(i->temp_path); | |
176 | assert(i->final_path); | |
177 | ||
178 | i->tar_fd = safe_close(i->tar_fd); | |
179 | ||
180 | if (i->tar_pid > 0) { | |
7d4904fe | 181 | r = wait_for_terminate_and_check("tar", i->tar_pid, WAIT_LOG); |
b6e676ce LP |
182 | i->tar_pid = 0; |
183 | if (r < 0) | |
184 | return r; | |
185 | } | |
186 | ||
187 | if (i->read_only) { | |
188 | r = import_make_read_only(i->temp_path); | |
189 | if (r < 0) | |
190 | return r; | |
191 | } | |
192 | ||
d9e2daaf LP |
193 | if (i->force_local) |
194 | (void) rm_rf(i->final_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); | |
b6e676ce | 195 | |
f85ef957 AC |
196 | r = rename_noreplace(AT_FDCWD, i->temp_path, AT_FDCWD, i->final_path); |
197 | if (r < 0) | |
198 | return log_error_errno(r, "Failed to move image into place: %m"); | |
b6e676ce | 199 | |
a1e58e8e | 200 | i->temp_path = mfree(i->temp_path); |
b6e676ce LP |
201 | |
202 | return 0; | |
203 | } | |
204 | ||
205 | static int tar_import_fork_tar(TarImport *i) { | |
206 | int r; | |
207 | ||
208 | assert(i); | |
209 | ||
210 | assert(!i->final_path); | |
211 | assert(!i->temp_path); | |
212 | assert(i->tar_fd < 0); | |
213 | ||
605405c6 | 214 | i->final_path = strjoin(i->image_root, "/", i->local); |
b6e676ce LP |
215 | if (!i->final_path) |
216 | return log_oom(); | |
217 | ||
14bcf25c | 218 | r = tempfn_random(i->final_path, NULL, &i->temp_path); |
b6e676ce LP |
219 | if (r < 0) |
220 | return log_oom(); | |
221 | ||
222 | (void) mkdir_parents_label(i->temp_path, 0700); | |
223 | ||
224 | r = btrfs_subvol_make(i->temp_path); | |
225 | if (r == -ENOTTY) { | |
226 | if (mkdir(i->temp_path, 0755) < 0) | |
227 | return log_error_errno(errno, "Failed to create directory %s: %m", i->temp_path); | |
228 | } else if (r < 0) | |
709f6e46 | 229 | return log_error_errno(r, "Failed to create subvolume %s: %m", i->temp_path); |
8c9cfc28 LP |
230 | else |
231 | (void) import_assign_pool_quota_and_warn(i->temp_path); | |
b6e676ce | 232 | |
587fec42 | 233 | i->tar_fd = import_fork_tar_x(i->temp_path, &i->tar_pid); |
b6e676ce LP |
234 | if (i->tar_fd < 0) |
235 | return i->tar_fd; | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | static int tar_import_write(const void *p, size_t sz, void *userdata) { | |
241 | TarImport *i = userdata; | |
242 | int r; | |
243 | ||
244 | if (i->grow_machine_directory && i->written_since_last_grow >= GROW_INTERVAL_BYTES) { | |
245 | i->written_since_last_grow = 0; | |
246 | grow_machine_directory(); | |
247 | } | |
248 | ||
249 | r = loop_write(i->tar_fd, p, sz, false); | |
250 | if (r < 0) | |
251 | return r; | |
252 | ||
253 | i->written_uncompressed += sz; | |
254 | i->written_since_last_grow += sz; | |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
259 | static int tar_import_process(TarImport *i) { | |
260 | ssize_t l; | |
261 | int r; | |
262 | ||
263 | assert(i); | |
264 | assert(i->buffer_size < sizeof(i->buffer)); | |
265 | ||
266 | l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size); | |
267 | if (l < 0) { | |
587fec42 LP |
268 | if (errno == EAGAIN) |
269 | return 0; | |
270 | ||
b6e676ce LP |
271 | r = log_error_errno(errno, "Failed to read input file: %m"); |
272 | goto finish; | |
273 | } | |
274 | if (l == 0) { | |
275 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
35bca925 | 276 | log_error("Premature end of file."); |
b6e676ce LP |
277 | r = -EIO; |
278 | goto finish; | |
279 | } | |
280 | ||
281 | r = tar_import_finish(i); | |
282 | goto finish; | |
283 | } | |
284 | ||
285 | i->buffer_size += l; | |
286 | ||
287 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
288 | r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size); | |
289 | if (r < 0) { | |
35bca925 | 290 | log_error_errno(r, "Failed to detect file compression: %m"); |
b6e676ce LP |
291 | goto finish; |
292 | } | |
293 | if (r == 0) /* Need more data */ | |
294 | return 0; | |
295 | ||
296 | r = tar_import_fork_tar(i); | |
297 | if (r < 0) | |
298 | goto finish; | |
299 | } | |
300 | ||
301 | r = import_uncompress(&i->compress, i->buffer, i->buffer_size, tar_import_write, i); | |
302 | if (r < 0) { | |
303 | log_error_errno(r, "Failed to decode and write: %m"); | |
304 | goto finish; | |
305 | } | |
306 | ||
307 | i->written_compressed += i->buffer_size; | |
308 | i->buffer_size = 0; | |
309 | ||
310 | tar_import_report_progress(i); | |
311 | ||
312 | return 0; | |
313 | ||
314 | finish: | |
315 | if (i->on_finished) | |
316 | i->on_finished(i, r, i->userdata); | |
317 | else | |
318 | sd_event_exit(i->event, r); | |
319 | ||
320 | return 0; | |
321 | } | |
322 | ||
323 | static int tar_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
324 | TarImport *i = userdata; | |
325 | ||
326 | return tar_import_process(i); | |
327 | } | |
328 | ||
329 | static int tar_import_on_defer(sd_event_source *s, void *userdata) { | |
330 | TarImport *i = userdata; | |
331 | ||
332 | return tar_import_process(i); | |
333 | } | |
334 | ||
335 | int tar_import_start(TarImport *i, int fd, const char *local, bool force_local, bool read_only) { | |
336 | int r; | |
337 | ||
338 | assert(i); | |
339 | assert(fd >= 0); | |
340 | assert(local); | |
341 | ||
342 | if (!machine_name_is_valid(local)) | |
343 | return -EINVAL; | |
344 | ||
345 | if (i->input_fd >= 0) | |
346 | return -EBUSY; | |
347 | ||
587fec42 LP |
348 | r = fd_nonblock(fd, true); |
349 | if (r < 0) | |
350 | return r; | |
351 | ||
b6e676ce LP |
352 | r = free_and_strdup(&i->local, local); |
353 | if (r < 0) | |
354 | return r; | |
355 | i->force_local = force_local; | |
356 | i->read_only = read_only; | |
357 | ||
358 | if (fstat(fd, &i->st) < 0) | |
359 | return -errno; | |
360 | ||
361 | r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, tar_import_on_input, i); | |
362 | if (r == -EPERM) { | |
363 | /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */ | |
364 | r = sd_event_add_defer(i->event, &i->input_event_source, tar_import_on_defer, i); | |
365 | if (r < 0) | |
366 | return r; | |
367 | ||
368 | r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON); | |
369 | } | |
370 | if (r < 0) | |
371 | return r; | |
372 | ||
373 | i->input_fd = fd; | |
374 | return r; | |
375 | } |