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Commit | Line | Data |
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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" | |
e4de7287 | 27 | #include "tmpfile-util.h" |
07630cea | 28 | #include "util.h" |
b6e676ce LP |
29 | |
30 | struct TarImport { | |
31 | sd_event *event; | |
32 | ||
33 | char *image_root; | |
34 | ||
35 | TarImportFinished on_finished; | |
36 | void *userdata; | |
37 | ||
38 | char *local; | |
39 | bool force_local; | |
40 | bool read_only; | |
b6e676ce LP |
41 | |
42 | char *temp_path; | |
43 | char *final_path; | |
44 | ||
45 | int input_fd; | |
46 | int tar_fd; | |
47 | ||
48 | ImportCompress compress; | |
49 | ||
b6e676ce LP |
50 | sd_event_source *input_event_source; |
51 | ||
52 | uint8_t buffer[16*1024]; | |
53 | size_t buffer_size; | |
54 | ||
55 | uint64_t written_compressed; | |
56 | uint64_t written_uncompressed; | |
57 | ||
58 | struct stat st; | |
59 | ||
60 | pid_t tar_pid; | |
61 | ||
62 | unsigned last_percent; | |
63 | RateLimit progress_rate_limit; | |
64 | }; | |
65 | ||
66 | TarImport* tar_import_unref(TarImport *i) { | |
67 | if (!i) | |
68 | return NULL; | |
69 | ||
587fec42 | 70 | sd_event_source_unref(i->input_event_source); |
b6e676ce LP |
71 | |
72 | if (i->tar_pid > 1) { | |
73 | (void) kill_and_sigcont(i->tar_pid, SIGKILL); | |
74 | (void) wait_for_terminate(i->tar_pid, NULL); | |
75 | } | |
76 | ||
77 | if (i->temp_path) { | |
d9e2daaf | 78 | (void) rm_rf(i->temp_path, REMOVE_ROOT|REMOVE_PHYSICAL|REMOVE_SUBVOLUME); |
b6e676ce LP |
79 | free(i->temp_path); |
80 | } | |
81 | ||
82 | import_compress_free(&i->compress); | |
83 | ||
587fec42 | 84 | sd_event_unref(i->event); |
b6e676ce LP |
85 | |
86 | safe_close(i->tar_fd); | |
87 | ||
88 | free(i->final_path); | |
89 | free(i->image_root); | |
90 | free(i->local); | |
6b430fdb | 91 | return mfree(i); |
b6e676ce LP |
92 | } |
93 | ||
94 | int tar_import_new( | |
95 | TarImport **ret, | |
96 | sd_event *event, | |
97 | const char *image_root, | |
98 | TarImportFinished on_finished, | |
99 | void *userdata) { | |
100 | ||
101 | _cleanup_(tar_import_unrefp) TarImport *i = NULL; | |
0d94088e | 102 | _cleanup_free_ char *root = NULL; |
b6e676ce LP |
103 | int r; |
104 | ||
105 | assert(ret); | |
106 | ||
0d94088e YW |
107 | root = strdup(image_root ?: "/var/lib/machines"); |
108 | if (!root) | |
b6e676ce LP |
109 | return -ENOMEM; |
110 | ||
0d94088e YW |
111 | i = new(TarImport, 1); |
112 | if (!i) | |
b6e676ce LP |
113 | return -ENOMEM; |
114 | ||
0d94088e YW |
115 | *i = (TarImport) { |
116 | .input_fd = -1, | |
117 | .tar_fd = -1, | |
118 | .on_finished = on_finished, | |
119 | .userdata = userdata, | |
120 | .last_percent = (unsigned) -1, | |
121 | .image_root = TAKE_PTR(root), | |
0d94088e YW |
122 | }; |
123 | ||
124 | RATELIMIT_INIT(i->progress_rate_limit, 100 * USEC_PER_MSEC, 1); | |
b6e676ce LP |
125 | |
126 | if (event) | |
127 | i->event = sd_event_ref(event); | |
128 | else { | |
129 | r = sd_event_default(&i->event); | |
130 | if (r < 0) | |
131 | return r; | |
132 | } | |
133 | ||
1cc6c93a | 134 | *ret = TAKE_PTR(i); |
b6e676ce LP |
135 | |
136 | return 0; | |
137 | } | |
138 | ||
139 | static void tar_import_report_progress(TarImport *i) { | |
140 | unsigned percent; | |
141 | assert(i); | |
142 | ||
143 | /* We have no size information, unless the source is a regular file */ | |
144 | if (!S_ISREG(i->st.st_mode)) | |
145 | return; | |
146 | ||
147 | if (i->written_compressed >= (uint64_t) i->st.st_size) | |
148 | percent = 100; | |
149 | else | |
150 | percent = (unsigned) ((i->written_compressed * UINT64_C(100)) / (uint64_t) i->st.st_size); | |
151 | ||
152 | if (percent == i->last_percent) | |
153 | return; | |
154 | ||
7994ac1d | 155 | if (!ratelimit_below(&i->progress_rate_limit)) |
b6e676ce LP |
156 | return; |
157 | ||
158 | sd_notifyf(false, "X_IMPORT_PROGRESS=%u", percent); | |
159 | log_info("Imported %u%%.", percent); | |
160 | ||
161 | i->last_percent = percent; | |
162 | } | |
163 | ||
164 | static int tar_import_finish(TarImport *i) { | |
165 | int r; | |
166 | ||
167 | assert(i); | |
168 | assert(i->tar_fd >= 0); | |
169 | assert(i->temp_path); | |
170 | assert(i->final_path); | |
171 | ||
172 | i->tar_fd = safe_close(i->tar_fd); | |
173 | ||
174 | if (i->tar_pid > 0) { | |
7d4904fe | 175 | r = wait_for_terminate_and_check("tar", i->tar_pid, WAIT_LOG); |
b6e676ce LP |
176 | i->tar_pid = 0; |
177 | if (r < 0) | |
178 | return r; | |
d02bfa50 LP |
179 | if (r != EXIT_SUCCESS) |
180 | return -EPROTO; | |
b6e676ce LP |
181 | } |
182 | ||
e21b7229 LP |
183 | r = import_mangle_os_tree(i->temp_path); |
184 | if (r < 0) | |
185 | return r; | |
186 | ||
b6e676ce LP |
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 | ||
b6e676ce LP |
244 | r = loop_write(i->tar_fd, p, sz, false); |
245 | if (r < 0) | |
246 | return r; | |
247 | ||
248 | i->written_uncompressed += sz; | |
b6e676ce LP |
249 | |
250 | return 0; | |
251 | } | |
252 | ||
253 | static int tar_import_process(TarImport *i) { | |
254 | ssize_t l; | |
255 | int r; | |
256 | ||
257 | assert(i); | |
258 | assert(i->buffer_size < sizeof(i->buffer)); | |
259 | ||
260 | l = read(i->input_fd, i->buffer + i->buffer_size, sizeof(i->buffer) - i->buffer_size); | |
261 | if (l < 0) { | |
587fec42 LP |
262 | if (errno == EAGAIN) |
263 | return 0; | |
264 | ||
b6e676ce LP |
265 | r = log_error_errno(errno, "Failed to read input file: %m"); |
266 | goto finish; | |
267 | } | |
268 | if (l == 0) { | |
269 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
35bca925 | 270 | log_error("Premature end of file."); |
b6e676ce LP |
271 | r = -EIO; |
272 | goto finish; | |
273 | } | |
274 | ||
275 | r = tar_import_finish(i); | |
276 | goto finish; | |
277 | } | |
278 | ||
279 | i->buffer_size += l; | |
280 | ||
281 | if (i->compress.type == IMPORT_COMPRESS_UNKNOWN) { | |
282 | r = import_uncompress_detect(&i->compress, i->buffer, i->buffer_size); | |
283 | if (r < 0) { | |
35bca925 | 284 | log_error_errno(r, "Failed to detect file compression: %m"); |
b6e676ce LP |
285 | goto finish; |
286 | } | |
287 | if (r == 0) /* Need more data */ | |
288 | return 0; | |
289 | ||
290 | r = tar_import_fork_tar(i); | |
291 | if (r < 0) | |
292 | goto finish; | |
293 | } | |
294 | ||
295 | r = import_uncompress(&i->compress, i->buffer, i->buffer_size, tar_import_write, i); | |
296 | if (r < 0) { | |
297 | log_error_errno(r, "Failed to decode and write: %m"); | |
298 | goto finish; | |
299 | } | |
300 | ||
301 | i->written_compressed += i->buffer_size; | |
302 | i->buffer_size = 0; | |
303 | ||
304 | tar_import_report_progress(i); | |
305 | ||
306 | return 0; | |
307 | ||
308 | finish: | |
309 | if (i->on_finished) | |
310 | i->on_finished(i, r, i->userdata); | |
311 | else | |
312 | sd_event_exit(i->event, r); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static int tar_import_on_input(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
318 | TarImport *i = userdata; | |
319 | ||
320 | return tar_import_process(i); | |
321 | } | |
322 | ||
323 | static int tar_import_on_defer(sd_event_source *s, void *userdata) { | |
324 | TarImport *i = userdata; | |
325 | ||
326 | return tar_import_process(i); | |
327 | } | |
328 | ||
329 | int tar_import_start(TarImport *i, int fd, const char *local, bool force_local, bool read_only) { | |
330 | int r; | |
331 | ||
332 | assert(i); | |
333 | assert(fd >= 0); | |
334 | assert(local); | |
335 | ||
336 | if (!machine_name_is_valid(local)) | |
337 | return -EINVAL; | |
338 | ||
339 | if (i->input_fd >= 0) | |
340 | return -EBUSY; | |
341 | ||
587fec42 LP |
342 | r = fd_nonblock(fd, true); |
343 | if (r < 0) | |
344 | return r; | |
345 | ||
b6e676ce LP |
346 | r = free_and_strdup(&i->local, local); |
347 | if (r < 0) | |
348 | return r; | |
349 | i->force_local = force_local; | |
350 | i->read_only = read_only; | |
351 | ||
352 | if (fstat(fd, &i->st) < 0) | |
353 | return -errno; | |
354 | ||
355 | r = sd_event_add_io(i->event, &i->input_event_source, fd, EPOLLIN, tar_import_on_input, i); | |
356 | if (r == -EPERM) { | |
357 | /* This fd does not support epoll, for example because it is a regular file. Busy read in that case */ | |
358 | r = sd_event_add_defer(i->event, &i->input_event_source, tar_import_on_defer, i); | |
359 | if (r < 0) | |
360 | return r; | |
361 | ||
362 | r = sd_event_source_set_enabled(i->input_event_source, SD_EVENT_ON); | |
363 | } | |
364 | if (r < 0) | |
365 | return r; | |
366 | ||
367 | i->input_fd = fd; | |
368 | return r; | |
369 | } |