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1 | /* SPDX-License-Identifier: LGPL-2.1+ */ | |
2 | /*** | |
3 | Copyright 2015 Lennart Poettering | |
4 | ***/ | |
5 | ||
6 | #include <sys/prctl.h> | |
7 | #include <sys/wait.h> | |
8 | ||
9 | #include "sd-bus.h" | |
10 | ||
11 | #include "alloc-util.h" | |
12 | #include "bus-common-errors.h" | |
13 | #include "bus-util.h" | |
14 | #include "def.h" | |
15 | #include "fd-util.h" | |
16 | #include "hostname-util.h" | |
17 | #include "import-util.h" | |
18 | #include "machine-pool.h" | |
19 | #include "missing.h" | |
20 | #include "mkdir.h" | |
21 | #include "parse-util.h" | |
22 | #include "path-util.h" | |
23 | #include "process-util.h" | |
24 | #include "signal-util.h" | |
25 | #include "socket-util.h" | |
26 | #include "string-table.h" | |
27 | #include "strv.h" | |
28 | #include "syslog-util.h" | |
29 | #include "user-util.h" | |
30 | #include "util.h" | |
31 | #include "web-util.h" | |
32 | ||
33 | typedef struct Transfer Transfer; | |
34 | typedef struct Manager Manager; | |
35 | ||
36 | typedef enum TransferType { | |
37 | TRANSFER_IMPORT_TAR, | |
38 | TRANSFER_IMPORT_RAW, | |
39 | TRANSFER_EXPORT_TAR, | |
40 | TRANSFER_EXPORT_RAW, | |
41 | TRANSFER_PULL_TAR, | |
42 | TRANSFER_PULL_RAW, | |
43 | _TRANSFER_TYPE_MAX, | |
44 | _TRANSFER_TYPE_INVALID = -1, | |
45 | } TransferType; | |
46 | ||
47 | struct Transfer { | |
48 | Manager *manager; | |
49 | ||
50 | uint32_t id; | |
51 | char *object_path; | |
52 | ||
53 | TransferType type; | |
54 | ImportVerify verify; | |
55 | ||
56 | char *remote; | |
57 | char *local; | |
58 | bool force_local; | |
59 | bool read_only; | |
60 | ||
61 | char *format; | |
62 | ||
63 | pid_t pid; | |
64 | ||
65 | int log_fd; | |
66 | ||
67 | char log_message[LINE_MAX]; | |
68 | size_t log_message_size; | |
69 | ||
70 | sd_event_source *pid_event_source; | |
71 | sd_event_source *log_event_source; | |
72 | ||
73 | unsigned n_canceled; | |
74 | unsigned progress_percent; | |
75 | ||
76 | int stdin_fd; | |
77 | int stdout_fd; | |
78 | }; | |
79 | ||
80 | struct Manager { | |
81 | sd_event *event; | |
82 | sd_bus *bus; | |
83 | ||
84 | uint32_t current_transfer_id; | |
85 | Hashmap *transfers; | |
86 | ||
87 | Hashmap *polkit_registry; | |
88 | ||
89 | int notify_fd; | |
90 | ||
91 | sd_event_source *notify_event_source; | |
92 | }; | |
93 | ||
94 | #define TRANSFERS_MAX 64 | |
95 | ||
96 | static const char* const transfer_type_table[_TRANSFER_TYPE_MAX] = { | |
97 | [TRANSFER_IMPORT_TAR] = "import-tar", | |
98 | [TRANSFER_IMPORT_RAW] = "import-raw", | |
99 | [TRANSFER_EXPORT_TAR] = "export-tar", | |
100 | [TRANSFER_EXPORT_RAW] = "export-raw", | |
101 | [TRANSFER_PULL_TAR] = "pull-tar", | |
102 | [TRANSFER_PULL_RAW] = "pull-raw", | |
103 | }; | |
104 | ||
105 | DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(transfer_type, TransferType); | |
106 | ||
107 | static Transfer *transfer_unref(Transfer *t) { | |
108 | if (!t) | |
109 | return NULL; | |
110 | ||
111 | if (t->manager) | |
112 | hashmap_remove(t->manager->transfers, UINT32_TO_PTR(t->id)); | |
113 | ||
114 | sd_event_source_unref(t->pid_event_source); | |
115 | sd_event_source_unref(t->log_event_source); | |
116 | ||
117 | free(t->remote); | |
118 | free(t->local); | |
119 | free(t->format); | |
120 | free(t->object_path); | |
121 | ||
122 | if (t->pid > 0) { | |
123 | (void) kill_and_sigcont(t->pid, SIGKILL); | |
124 | (void) wait_for_terminate(t->pid, NULL); | |
125 | } | |
126 | ||
127 | safe_close(t->log_fd); | |
128 | safe_close(t->stdin_fd); | |
129 | safe_close(t->stdout_fd); | |
130 | ||
131 | return mfree(t); | |
132 | } | |
133 | ||
134 | DEFINE_TRIVIAL_CLEANUP_FUNC(Transfer*, transfer_unref); | |
135 | ||
136 | static int transfer_new(Manager *m, Transfer **ret) { | |
137 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
138 | uint32_t id; | |
139 | int r; | |
140 | ||
141 | assert(m); | |
142 | assert(ret); | |
143 | ||
144 | if (hashmap_size(m->transfers) >= TRANSFERS_MAX) | |
145 | return -E2BIG; | |
146 | ||
147 | r = hashmap_ensure_allocated(&m->transfers, &trivial_hash_ops); | |
148 | if (r < 0) | |
149 | return r; | |
150 | ||
151 | t = new0(Transfer, 1); | |
152 | if (!t) | |
153 | return -ENOMEM; | |
154 | ||
155 | t->type = _TRANSFER_TYPE_INVALID; | |
156 | t->log_fd = -1; | |
157 | t->stdin_fd = -1; | |
158 | t->stdout_fd = -1; | |
159 | t->verify = _IMPORT_VERIFY_INVALID; | |
160 | ||
161 | id = m->current_transfer_id + 1; | |
162 | ||
163 | if (asprintf(&t->object_path, "/org/freedesktop/import1/transfer/_%" PRIu32, id) < 0) | |
164 | return -ENOMEM; | |
165 | ||
166 | r = hashmap_put(m->transfers, UINT32_TO_PTR(id), t); | |
167 | if (r < 0) | |
168 | return r; | |
169 | ||
170 | m->current_transfer_id = id; | |
171 | ||
172 | t->manager = m; | |
173 | t->id = id; | |
174 | ||
175 | *ret = TAKE_PTR(t); | |
176 | ||
177 | return 0; | |
178 | } | |
179 | ||
180 | static void transfer_send_log_line(Transfer *t, const char *line) { | |
181 | int r, priority = LOG_INFO; | |
182 | ||
183 | assert(t); | |
184 | assert(line); | |
185 | ||
186 | syslog_parse_priority(&line, &priority, true); | |
187 | ||
188 | log_full(priority, "(transfer%" PRIu32 ") %s", t->id, line); | |
189 | ||
190 | r = sd_bus_emit_signal( | |
191 | t->manager->bus, | |
192 | t->object_path, | |
193 | "org.freedesktop.import1.Transfer", | |
194 | "LogMessage", | |
195 | "us", | |
196 | priority, | |
197 | line); | |
198 | if (r < 0) | |
199 | log_error_errno(r, "Cannot emit message: %m"); | |
200 | } | |
201 | ||
202 | static void transfer_send_logs(Transfer *t, bool flush) { | |
203 | assert(t); | |
204 | ||
205 | /* Try to send out all log messages, if we can. But if we | |
206 | * can't we remove the messages from the buffer, but don't | |
207 | * fail */ | |
208 | ||
209 | while (t->log_message_size > 0) { | |
210 | _cleanup_free_ char *n = NULL; | |
211 | char *e; | |
212 | ||
213 | if (t->log_message_size >= sizeof(t->log_message)) | |
214 | e = t->log_message + sizeof(t->log_message); | |
215 | else { | |
216 | char *a, *b; | |
217 | ||
218 | a = memchr(t->log_message, 0, t->log_message_size); | |
219 | b = memchr(t->log_message, '\n', t->log_message_size); | |
220 | ||
221 | if (a && b) | |
222 | e = a < b ? a : b; | |
223 | else if (a) | |
224 | e = a; | |
225 | else | |
226 | e = b; | |
227 | } | |
228 | ||
229 | if (!e) { | |
230 | if (!flush) | |
231 | return; | |
232 | ||
233 | e = t->log_message + t->log_message_size; | |
234 | } | |
235 | ||
236 | n = strndup(t->log_message, e - t->log_message); | |
237 | ||
238 | /* Skip over NUL and newlines */ | |
239 | while (e < t->log_message + t->log_message_size && (*e == 0 || *e == '\n')) | |
240 | e++; | |
241 | ||
242 | memmove(t->log_message, e, t->log_message + sizeof(t->log_message) - e); | |
243 | t->log_message_size -= e - t->log_message; | |
244 | ||
245 | if (!n) { | |
246 | log_oom(); | |
247 | continue; | |
248 | } | |
249 | ||
250 | if (isempty(n)) | |
251 | continue; | |
252 | ||
253 | transfer_send_log_line(t, n); | |
254 | } | |
255 | } | |
256 | ||
257 | static int transfer_finalize(Transfer *t, bool success) { | |
258 | int r; | |
259 | ||
260 | assert(t); | |
261 | ||
262 | transfer_send_logs(t, true); | |
263 | ||
264 | r = sd_bus_emit_signal( | |
265 | t->manager->bus, | |
266 | "/org/freedesktop/import1", | |
267 | "org.freedesktop.import1.Manager", | |
268 | "TransferRemoved", | |
269 | "uos", | |
270 | t->id, | |
271 | t->object_path, | |
272 | success ? "done" : | |
273 | t->n_canceled > 0 ? "canceled" : "failed"); | |
274 | ||
275 | if (r < 0) | |
276 | log_error_errno(r, "Cannot emit message: %m"); | |
277 | ||
278 | transfer_unref(t); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static int transfer_cancel(Transfer *t) { | |
283 | int r; | |
284 | ||
285 | assert(t); | |
286 | ||
287 | r = kill_and_sigcont(t->pid, t->n_canceled < 3 ? SIGTERM : SIGKILL); | |
288 | if (r < 0) | |
289 | return r; | |
290 | ||
291 | t->n_canceled++; | |
292 | return 0; | |
293 | } | |
294 | ||
295 | static int transfer_on_pid(sd_event_source *s, const siginfo_t *si, void *userdata) { | |
296 | Transfer *t = userdata; | |
297 | bool success = false; | |
298 | ||
299 | assert(s); | |
300 | assert(t); | |
301 | ||
302 | if (si->si_code == CLD_EXITED) { | |
303 | if (si->si_status != 0) | |
304 | log_error("Import process failed with exit code %i.", si->si_status); | |
305 | else { | |
306 | log_debug("Import process succeeded."); | |
307 | success = true; | |
308 | } | |
309 | ||
310 | } else if (IN_SET(si->si_code, CLD_KILLED, CLD_DUMPED)) | |
311 | ||
312 | log_error("Import process terminated by signal %s.", signal_to_string(si->si_status)); | |
313 | else | |
314 | log_error("Import process failed due to unknown reason."); | |
315 | ||
316 | t->pid = 0; | |
317 | ||
318 | return transfer_finalize(t, success); | |
319 | } | |
320 | ||
321 | static int transfer_on_log(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
322 | Transfer *t = userdata; | |
323 | ssize_t l; | |
324 | ||
325 | assert(s); | |
326 | assert(t); | |
327 | ||
328 | l = read(fd, t->log_message + t->log_message_size, sizeof(t->log_message) - t->log_message_size); | |
329 | if (l <= 0) { | |
330 | /* EOF/read error. We just close the pipe here, and | |
331 | * close the watch, waiting for the SIGCHLD to arrive, | |
332 | * before we do anything else. */ | |
333 | ||
334 | if (l < 0) | |
335 | log_error_errno(errno, "Failed to read log message: %m"); | |
336 | ||
337 | t->log_event_source = sd_event_source_unref(t->log_event_source); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | t->log_message_size += l; | |
342 | ||
343 | transfer_send_logs(t, false); | |
344 | ||
345 | return 0; | |
346 | } | |
347 | ||
348 | static int transfer_start(Transfer *t) { | |
349 | _cleanup_close_pair_ int pipefd[2] = { -1, -1 }; | |
350 | int r; | |
351 | ||
352 | assert(t); | |
353 | assert(t->pid <= 0); | |
354 | ||
355 | if (pipe2(pipefd, O_CLOEXEC) < 0) | |
356 | return -errno; | |
357 | ||
358 | r = safe_fork("(sd-transfer)", FORK_RESET_SIGNALS|FORK_DEATHSIG, &t->pid); | |
359 | if (r < 0) | |
360 | return r; | |
361 | if (r == 0) { | |
362 | const char *cmd[] = { | |
363 | NULL, /* systemd-import, systemd-export or systemd-pull */ | |
364 | NULL, /* tar, raw */ | |
365 | NULL, /* --verify= */ | |
366 | NULL, /* verify argument */ | |
367 | NULL, /* maybe --force */ | |
368 | NULL, /* maybe --read-only */ | |
369 | NULL, /* if so: the actual URL */ | |
370 | NULL, /* maybe --format= */ | |
371 | NULL, /* if so: the actual format */ | |
372 | NULL, /* remote */ | |
373 | NULL, /* local */ | |
374 | NULL | |
375 | }; | |
376 | unsigned k = 0; | |
377 | ||
378 | /* Child */ | |
379 | ||
380 | pipefd[0] = safe_close(pipefd[0]); | |
381 | ||
382 | r = rearrange_stdio(t->stdin_fd, | |
383 | t->stdout_fd < 0 ? pipefd[1] : t->stdout_fd, | |
384 | pipefd[1]); | |
385 | if (r < 0) { | |
386 | log_error_errno(r, "Failed to set stdin/stdout/stderr: %m"); | |
387 | _exit(EXIT_FAILURE); | |
388 | } | |
389 | ||
390 | if (setenv("SYSTEMD_LOG_TARGET", "console-prefixed", 1) < 0 || | |
391 | setenv("NOTIFY_SOCKET", "/run/systemd/import/notify", 1) < 0) { | |
392 | log_error_errno(errno, "setenv() failed: %m"); | |
393 | _exit(EXIT_FAILURE); | |
394 | } | |
395 | ||
396 | if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_IMPORT_RAW)) | |
397 | cmd[k++] = SYSTEMD_IMPORT_PATH; | |
398 | else if (IN_SET(t->type, TRANSFER_EXPORT_TAR, TRANSFER_EXPORT_RAW)) | |
399 | cmd[k++] = SYSTEMD_EXPORT_PATH; | |
400 | else | |
401 | cmd[k++] = SYSTEMD_PULL_PATH; | |
402 | ||
403 | if (IN_SET(t->type, TRANSFER_IMPORT_TAR, TRANSFER_EXPORT_TAR, TRANSFER_PULL_TAR)) | |
404 | cmd[k++] = "tar"; | |
405 | else | |
406 | cmd[k++] = "raw"; | |
407 | ||
408 | if (t->verify != _IMPORT_VERIFY_INVALID) { | |
409 | cmd[k++] = "--verify"; | |
410 | cmd[k++] = import_verify_to_string(t->verify); | |
411 | } | |
412 | ||
413 | if (t->force_local) | |
414 | cmd[k++] = "--force"; | |
415 | if (t->read_only) | |
416 | cmd[k++] = "--read-only"; | |
417 | ||
418 | if (t->format) { | |
419 | cmd[k++] = "--format"; | |
420 | cmd[k++] = t->format; | |
421 | } | |
422 | ||
423 | if (!IN_SET(t->type, TRANSFER_EXPORT_TAR, TRANSFER_EXPORT_RAW)) { | |
424 | if (t->remote) | |
425 | cmd[k++] = t->remote; | |
426 | else | |
427 | cmd[k++] = "-"; | |
428 | } | |
429 | ||
430 | if (t->local) | |
431 | cmd[k++] = t->local; | |
432 | cmd[k] = NULL; | |
433 | ||
434 | execv(cmd[0], (char * const *) cmd); | |
435 | log_error_errno(errno, "Failed to execute %s tool: %m", cmd[0]); | |
436 | _exit(EXIT_FAILURE); | |
437 | } | |
438 | ||
439 | pipefd[1] = safe_close(pipefd[1]); | |
440 | t->log_fd = TAKE_FD(pipefd[0]); | |
441 | ||
442 | t->stdin_fd = safe_close(t->stdin_fd); | |
443 | ||
444 | r = sd_event_add_child(t->manager->event, &t->pid_event_source, t->pid, WEXITED, transfer_on_pid, t); | |
445 | if (r < 0) | |
446 | return r; | |
447 | ||
448 | r = sd_event_add_io(t->manager->event, &t->log_event_source, t->log_fd, EPOLLIN, transfer_on_log, t); | |
449 | if (r < 0) | |
450 | return r; | |
451 | ||
452 | /* Make sure always process logging before SIGCHLD */ | |
453 | r = sd_event_source_set_priority(t->log_event_source, SD_EVENT_PRIORITY_NORMAL -5); | |
454 | if (r < 0) | |
455 | return r; | |
456 | ||
457 | r = sd_bus_emit_signal( | |
458 | t->manager->bus, | |
459 | "/org/freedesktop/import1", | |
460 | "org.freedesktop.import1.Manager", | |
461 | "TransferNew", | |
462 | "uo", | |
463 | t->id, | |
464 | t->object_path); | |
465 | if (r < 0) | |
466 | return r; | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static Manager *manager_unref(Manager *m) { | |
472 | Transfer *t; | |
473 | ||
474 | if (!m) | |
475 | return NULL; | |
476 | ||
477 | sd_event_source_unref(m->notify_event_source); | |
478 | safe_close(m->notify_fd); | |
479 | ||
480 | while ((t = hashmap_first(m->transfers))) | |
481 | transfer_unref(t); | |
482 | ||
483 | hashmap_free(m->transfers); | |
484 | ||
485 | bus_verify_polkit_async_registry_free(m->polkit_registry); | |
486 | ||
487 | m->bus = sd_bus_flush_close_unref(m->bus); | |
488 | sd_event_unref(m->event); | |
489 | ||
490 | return mfree(m); | |
491 | } | |
492 | ||
493 | DEFINE_TRIVIAL_CLEANUP_FUNC(Manager*, manager_unref); | |
494 | ||
495 | static int manager_on_notify(sd_event_source *s, int fd, uint32_t revents, void *userdata) { | |
496 | ||
497 | char buf[NOTIFY_BUFFER_MAX+1]; | |
498 | struct iovec iovec = { | |
499 | .iov_base = buf, | |
500 | .iov_len = sizeof(buf)-1, | |
501 | }; | |
502 | union { | |
503 | struct cmsghdr cmsghdr; | |
504 | uint8_t buf[CMSG_SPACE(sizeof(struct ucred)) + | |
505 | CMSG_SPACE(sizeof(int) * NOTIFY_FD_MAX)]; | |
506 | } control = {}; | |
507 | struct msghdr msghdr = { | |
508 | .msg_iov = &iovec, | |
509 | .msg_iovlen = 1, | |
510 | .msg_control = &control, | |
511 | .msg_controllen = sizeof(control), | |
512 | }; | |
513 | struct ucred *ucred = NULL; | |
514 | Manager *m = userdata; | |
515 | struct cmsghdr *cmsg; | |
516 | unsigned percent; | |
517 | char *p, *e; | |
518 | Transfer *t; | |
519 | Iterator i; | |
520 | ssize_t n; | |
521 | int r; | |
522 | ||
523 | n = recvmsg(fd, &msghdr, MSG_DONTWAIT|MSG_CMSG_CLOEXEC); | |
524 | if (n < 0) { | |
525 | if (IN_SET(errno, EAGAIN, EINTR)) | |
526 | return 0; | |
527 | ||
528 | return -errno; | |
529 | } | |
530 | ||
531 | cmsg_close_all(&msghdr); | |
532 | ||
533 | CMSG_FOREACH(cmsg, &msghdr) | |
534 | if (cmsg->cmsg_level == SOL_SOCKET && | |
535 | cmsg->cmsg_type == SCM_CREDENTIALS && | |
536 | cmsg->cmsg_len == CMSG_LEN(sizeof(struct ucred))) | |
537 | ucred = (struct ucred*) CMSG_DATA(cmsg); | |
538 | ||
539 | if (msghdr.msg_flags & MSG_TRUNC) { | |
540 | log_warning("Got overly long notification datagram, ignoring."); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | if (!ucred || ucred->pid <= 0) { | |
545 | log_warning("Got notification datagram lacking credential information, ignoring."); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | HASHMAP_FOREACH(t, m->transfers, i) | |
550 | if (ucred->pid == t->pid) | |
551 | break; | |
552 | ||
553 | if (!t) { | |
554 | log_warning("Got notification datagram from unexpected peer, ignoring."); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | buf[n] = 0; | |
559 | ||
560 | p = startswith(buf, "X_IMPORT_PROGRESS="); | |
561 | if (!p) { | |
562 | p = strstr(buf, "\nX_IMPORT_PROGRESS="); | |
563 | if (!p) | |
564 | return 0; | |
565 | ||
566 | p += 19; | |
567 | } | |
568 | ||
569 | e = strchrnul(p, '\n'); | |
570 | *e = 0; | |
571 | ||
572 | r = safe_atou(p, &percent); | |
573 | if (r < 0 || percent > 100) { | |
574 | log_warning("Got invalid percent value, ignoring."); | |
575 | return 0; | |
576 | } | |
577 | ||
578 | t->progress_percent = percent; | |
579 | ||
580 | log_debug("Got percentage from client: %u%%", percent); | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static int manager_new(Manager **ret) { | |
585 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
586 | static const union sockaddr_union sa = { | |
587 | .un.sun_family = AF_UNIX, | |
588 | .un.sun_path = "/run/systemd/import/notify", | |
589 | }; | |
590 | static const int one = 1; | |
591 | int r; | |
592 | ||
593 | assert(ret); | |
594 | ||
595 | m = new0(Manager, 1); | |
596 | if (!m) | |
597 | return -ENOMEM; | |
598 | ||
599 | r = sd_event_default(&m->event); | |
600 | if (r < 0) | |
601 | return r; | |
602 | ||
603 | sd_event_set_watchdog(m->event, true); | |
604 | ||
605 | r = sd_bus_default_system(&m->bus); | |
606 | if (r < 0) | |
607 | return r; | |
608 | ||
609 | m->notify_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); | |
610 | if (m->notify_fd < 0) | |
611 | return -errno; | |
612 | ||
613 | (void) mkdir_parents_label(sa.un.sun_path, 0755); | |
614 | (void) unlink(sa.un.sun_path); | |
615 | ||
616 | if (bind(m->notify_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) | |
617 | return -errno; | |
618 | ||
619 | if (setsockopt(m->notify_fd, SOL_SOCKET, SO_PASSCRED, &one, sizeof(one)) < 0) | |
620 | return -errno; | |
621 | ||
622 | r = sd_event_add_io(m->event, &m->notify_event_source, m->notify_fd, EPOLLIN, manager_on_notify, m); | |
623 | if (r < 0) | |
624 | return r; | |
625 | ||
626 | *ret = TAKE_PTR(m); | |
627 | ||
628 | return 0; | |
629 | } | |
630 | ||
631 | static Transfer *manager_find(Manager *m, TransferType type, const char *remote) { | |
632 | Transfer *t; | |
633 | Iterator i; | |
634 | ||
635 | assert(m); | |
636 | assert(type >= 0); | |
637 | assert(type < _TRANSFER_TYPE_MAX); | |
638 | ||
639 | HASHMAP_FOREACH(t, m->transfers, i) { | |
640 | ||
641 | if (t->type == type && | |
642 | streq_ptr(t->remote, remote)) | |
643 | return t; | |
644 | } | |
645 | ||
646 | return NULL; | |
647 | } | |
648 | ||
649 | static int method_import_tar_or_raw(sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
650 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
651 | int fd, force, read_only, r; | |
652 | const char *local, *object; | |
653 | Manager *m = userdata; | |
654 | TransferType type; | |
655 | uint32_t id; | |
656 | ||
657 | assert(msg); | |
658 | assert(m); | |
659 | ||
660 | r = bus_verify_polkit_async( | |
661 | msg, | |
662 | CAP_SYS_ADMIN, | |
663 | "org.freedesktop.import1.import", | |
664 | NULL, | |
665 | false, | |
666 | UID_INVALID, | |
667 | &m->polkit_registry, | |
668 | error); | |
669 | if (r < 0) | |
670 | return r; | |
671 | if (r == 0) | |
672 | return 1; /* Will call us back */ | |
673 | ||
674 | r = sd_bus_message_read(msg, "hsbb", &fd, &local, &force, &read_only); | |
675 | if (r < 0) | |
676 | return r; | |
677 | ||
678 | if (!machine_name_is_valid(local)) | |
679 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
680 | ||
681 | r = setup_machine_directory((uint64_t) -1, error); | |
682 | if (r < 0) | |
683 | return r; | |
684 | ||
685 | type = streq_ptr(sd_bus_message_get_member(msg), "ImportTar") ? TRANSFER_IMPORT_TAR : TRANSFER_IMPORT_RAW; | |
686 | ||
687 | r = transfer_new(m, &t); | |
688 | if (r < 0) | |
689 | return r; | |
690 | ||
691 | t->type = type; | |
692 | t->force_local = force; | |
693 | t->read_only = read_only; | |
694 | ||
695 | t->local = strdup(local); | |
696 | if (!t->local) | |
697 | return -ENOMEM; | |
698 | ||
699 | t->stdin_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
700 | if (t->stdin_fd < 0) | |
701 | return -errno; | |
702 | ||
703 | r = transfer_start(t); | |
704 | if (r < 0) | |
705 | return r; | |
706 | ||
707 | object = t->object_path; | |
708 | id = t->id; | |
709 | t = NULL; | |
710 | ||
711 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
712 | } | |
713 | ||
714 | static int method_export_tar_or_raw(sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
715 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
716 | int fd, r; | |
717 | const char *local, *object, *format; | |
718 | Manager *m = userdata; | |
719 | TransferType type; | |
720 | uint32_t id; | |
721 | ||
722 | assert(msg); | |
723 | assert(m); | |
724 | ||
725 | r = bus_verify_polkit_async( | |
726 | msg, | |
727 | CAP_SYS_ADMIN, | |
728 | "org.freedesktop.import1.export", | |
729 | NULL, | |
730 | false, | |
731 | UID_INVALID, | |
732 | &m->polkit_registry, | |
733 | error); | |
734 | if (r < 0) | |
735 | return r; | |
736 | if (r == 0) | |
737 | return 1; /* Will call us back */ | |
738 | ||
739 | r = sd_bus_message_read(msg, "shs", &local, &fd, &format); | |
740 | if (r < 0) | |
741 | return r; | |
742 | ||
743 | if (!machine_name_is_valid(local)) | |
744 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
745 | ||
746 | type = streq_ptr(sd_bus_message_get_member(msg), "ExportTar") ? TRANSFER_EXPORT_TAR : TRANSFER_EXPORT_RAW; | |
747 | ||
748 | r = transfer_new(m, &t); | |
749 | if (r < 0) | |
750 | return r; | |
751 | ||
752 | t->type = type; | |
753 | ||
754 | if (!isempty(format)) { | |
755 | t->format = strdup(format); | |
756 | if (!t->format) | |
757 | return -ENOMEM; | |
758 | } | |
759 | ||
760 | t->local = strdup(local); | |
761 | if (!t->local) | |
762 | return -ENOMEM; | |
763 | ||
764 | t->stdout_fd = fcntl(fd, F_DUPFD_CLOEXEC, 3); | |
765 | if (t->stdout_fd < 0) | |
766 | return -errno; | |
767 | ||
768 | r = transfer_start(t); | |
769 | if (r < 0) | |
770 | return r; | |
771 | ||
772 | object = t->object_path; | |
773 | id = t->id; | |
774 | t = NULL; | |
775 | ||
776 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
777 | } | |
778 | ||
779 | static int method_pull_tar_or_raw(sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
780 | _cleanup_(transfer_unrefp) Transfer *t = NULL; | |
781 | const char *remote, *local, *verify, *object; | |
782 | Manager *m = userdata; | |
783 | ImportVerify v; | |
784 | TransferType type; | |
785 | int force, r; | |
786 | uint32_t id; | |
787 | ||
788 | assert(msg); | |
789 | assert(m); | |
790 | ||
791 | r = bus_verify_polkit_async( | |
792 | msg, | |
793 | CAP_SYS_ADMIN, | |
794 | "org.freedesktop.import1.pull", | |
795 | NULL, | |
796 | false, | |
797 | UID_INVALID, | |
798 | &m->polkit_registry, | |
799 | error); | |
800 | if (r < 0) | |
801 | return r; | |
802 | if (r == 0) | |
803 | return 1; /* Will call us back */ | |
804 | ||
805 | r = sd_bus_message_read(msg, "sssb", &remote, &local, &verify, &force); | |
806 | if (r < 0) | |
807 | return r; | |
808 | ||
809 | if (!http_url_is_valid(remote)) | |
810 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "URL %s is invalid", remote); | |
811 | ||
812 | if (isempty(local)) | |
813 | local = NULL; | |
814 | else if (!machine_name_is_valid(local)) | |
815 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Local name %s is invalid", local); | |
816 | ||
817 | if (isempty(verify)) | |
818 | v = IMPORT_VERIFY_SIGNATURE; | |
819 | else | |
820 | v = import_verify_from_string(verify); | |
821 | if (v < 0) | |
822 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Unknown verification mode %s", verify); | |
823 | ||
824 | r = setup_machine_directory((uint64_t) -1, error); | |
825 | if (r < 0) | |
826 | return r; | |
827 | ||
828 | type = streq_ptr(sd_bus_message_get_member(msg), "PullTar") ? TRANSFER_PULL_TAR : TRANSFER_PULL_RAW; | |
829 | ||
830 | if (manager_find(m, type, remote)) | |
831 | return sd_bus_error_setf(error, BUS_ERROR_TRANSFER_IN_PROGRESS, "Transfer for %s already in progress.", remote); | |
832 | ||
833 | r = transfer_new(m, &t); | |
834 | if (r < 0) | |
835 | return r; | |
836 | ||
837 | t->type = type; | |
838 | t->verify = v; | |
839 | t->force_local = force; | |
840 | ||
841 | t->remote = strdup(remote); | |
842 | if (!t->remote) | |
843 | return -ENOMEM; | |
844 | ||
845 | if (local) { | |
846 | t->local = strdup(local); | |
847 | if (!t->local) | |
848 | return -ENOMEM; | |
849 | } | |
850 | ||
851 | r = transfer_start(t); | |
852 | if (r < 0) | |
853 | return r; | |
854 | ||
855 | object = t->object_path; | |
856 | id = t->id; | |
857 | t = NULL; | |
858 | ||
859 | return sd_bus_reply_method_return(msg, "uo", id, object); | |
860 | } | |
861 | ||
862 | static int method_list_transfers(sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
863 | _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL; | |
864 | Manager *m = userdata; | |
865 | Transfer *t; | |
866 | Iterator i; | |
867 | int r; | |
868 | ||
869 | assert(msg); | |
870 | assert(m); | |
871 | ||
872 | r = sd_bus_message_new_method_return(msg, &reply); | |
873 | if (r < 0) | |
874 | return r; | |
875 | ||
876 | r = sd_bus_message_open_container(reply, 'a', "(usssdo)"); | |
877 | if (r < 0) | |
878 | return r; | |
879 | ||
880 | HASHMAP_FOREACH(t, m->transfers, i) { | |
881 | ||
882 | r = sd_bus_message_append( | |
883 | reply, | |
884 | "(usssdo)", | |
885 | t->id, | |
886 | transfer_type_to_string(t->type), | |
887 | t->remote, | |
888 | t->local, | |
889 | (double) t->progress_percent / 100.0, | |
890 | t->object_path); | |
891 | if (r < 0) | |
892 | return r; | |
893 | } | |
894 | ||
895 | r = sd_bus_message_close_container(reply); | |
896 | if (r < 0) | |
897 | return r; | |
898 | ||
899 | return sd_bus_send(NULL, reply, NULL); | |
900 | } | |
901 | ||
902 | static int method_cancel(sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
903 | Transfer *t = userdata; | |
904 | int r; | |
905 | ||
906 | assert(msg); | |
907 | assert(t); | |
908 | ||
909 | r = bus_verify_polkit_async( | |
910 | msg, | |
911 | CAP_SYS_ADMIN, | |
912 | "org.freedesktop.import1.pull", | |
913 | NULL, | |
914 | false, | |
915 | UID_INVALID, | |
916 | &t->manager->polkit_registry, | |
917 | error); | |
918 | if (r < 0) | |
919 | return r; | |
920 | if (r == 0) | |
921 | return 1; /* Will call us back */ | |
922 | ||
923 | r = transfer_cancel(t); | |
924 | if (r < 0) | |
925 | return r; | |
926 | ||
927 | return sd_bus_reply_method_return(msg, NULL); | |
928 | } | |
929 | ||
930 | static int method_cancel_transfer(sd_bus_message *msg, void *userdata, sd_bus_error *error) { | |
931 | Manager *m = userdata; | |
932 | Transfer *t; | |
933 | uint32_t id; | |
934 | int r; | |
935 | ||
936 | assert(msg); | |
937 | assert(m); | |
938 | ||
939 | r = bus_verify_polkit_async( | |
940 | msg, | |
941 | CAP_SYS_ADMIN, | |
942 | "org.freedesktop.import1.pull", | |
943 | NULL, | |
944 | false, | |
945 | UID_INVALID, | |
946 | &m->polkit_registry, | |
947 | error); | |
948 | if (r < 0) | |
949 | return r; | |
950 | if (r == 0) | |
951 | return 1; /* Will call us back */ | |
952 | ||
953 | r = sd_bus_message_read(msg, "u", &id); | |
954 | if (r < 0) | |
955 | return r; | |
956 | if (id <= 0) | |
957 | return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid transfer id"); | |
958 | ||
959 | t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); | |
960 | if (!t) | |
961 | return sd_bus_error_setf(error, BUS_ERROR_NO_SUCH_TRANSFER, "No transfer by id %" PRIu32, id); | |
962 | ||
963 | r = transfer_cancel(t); | |
964 | if (r < 0) | |
965 | return r; | |
966 | ||
967 | return sd_bus_reply_method_return(msg, NULL); | |
968 | } | |
969 | ||
970 | static int property_get_progress( | |
971 | sd_bus *bus, | |
972 | const char *path, | |
973 | const char *interface, | |
974 | const char *property, | |
975 | sd_bus_message *reply, | |
976 | void *userdata, | |
977 | sd_bus_error *error) { | |
978 | ||
979 | Transfer *t = userdata; | |
980 | ||
981 | assert(bus); | |
982 | assert(reply); | |
983 | assert(t); | |
984 | ||
985 | return sd_bus_message_append(reply, "d", (double) t->progress_percent / 100.0); | |
986 | } | |
987 | ||
988 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_type, transfer_type, TransferType); | |
989 | static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_verify, import_verify, ImportVerify); | |
990 | ||
991 | static const sd_bus_vtable transfer_vtable[] = { | |
992 | SD_BUS_VTABLE_START(0), | |
993 | SD_BUS_PROPERTY("Id", "u", NULL, offsetof(Transfer, id), SD_BUS_VTABLE_PROPERTY_CONST), | |
994 | SD_BUS_PROPERTY("Local", "s", NULL, offsetof(Transfer, local), SD_BUS_VTABLE_PROPERTY_CONST), | |
995 | SD_BUS_PROPERTY("Remote", "s", NULL, offsetof(Transfer, remote), SD_BUS_VTABLE_PROPERTY_CONST), | |
996 | SD_BUS_PROPERTY("Type", "s", property_get_type, offsetof(Transfer, type), SD_BUS_VTABLE_PROPERTY_CONST), | |
997 | SD_BUS_PROPERTY("Verify", "s", property_get_verify, offsetof(Transfer, verify), SD_BUS_VTABLE_PROPERTY_CONST), | |
998 | SD_BUS_PROPERTY("Progress", "d", property_get_progress, 0, 0), | |
999 | SD_BUS_METHOD("Cancel", NULL, NULL, method_cancel, SD_BUS_VTABLE_UNPRIVILEGED), | |
1000 | SD_BUS_SIGNAL("LogMessage", "us", 0), | |
1001 | SD_BUS_VTABLE_END, | |
1002 | }; | |
1003 | ||
1004 | static const sd_bus_vtable manager_vtable[] = { | |
1005 | SD_BUS_VTABLE_START(0), | |
1006 | SD_BUS_METHOD("ImportTar", "hsbb", "uo", method_import_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
1007 | SD_BUS_METHOD("ImportRaw", "hsbb", "uo", method_import_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
1008 | SD_BUS_METHOD("ExportTar", "shs", "uo", method_export_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
1009 | SD_BUS_METHOD("ExportRaw", "shs", "uo", method_export_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
1010 | SD_BUS_METHOD("PullTar", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
1011 | SD_BUS_METHOD("PullRaw", "sssb", "uo", method_pull_tar_or_raw, SD_BUS_VTABLE_UNPRIVILEGED), | |
1012 | SD_BUS_METHOD("ListTransfers", NULL, "a(usssdo)", method_list_transfers, SD_BUS_VTABLE_UNPRIVILEGED), | |
1013 | SD_BUS_METHOD("CancelTransfer", "u", NULL, method_cancel_transfer, SD_BUS_VTABLE_UNPRIVILEGED), | |
1014 | SD_BUS_SIGNAL("TransferNew", "uo", 0), | |
1015 | SD_BUS_SIGNAL("TransferRemoved", "uos", 0), | |
1016 | SD_BUS_VTABLE_END, | |
1017 | }; | |
1018 | ||
1019 | static int transfer_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) { | |
1020 | Manager *m = userdata; | |
1021 | Transfer *t; | |
1022 | const char *p; | |
1023 | uint32_t id; | |
1024 | int r; | |
1025 | ||
1026 | assert(bus); | |
1027 | assert(path); | |
1028 | assert(interface); | |
1029 | assert(found); | |
1030 | assert(m); | |
1031 | ||
1032 | p = startswith(path, "/org/freedesktop/import1/transfer/_"); | |
1033 | if (!p) | |
1034 | return 0; | |
1035 | ||
1036 | r = safe_atou32(p, &id); | |
1037 | if (r < 0 || id == 0) | |
1038 | return 0; | |
1039 | ||
1040 | t = hashmap_get(m->transfers, UINT32_TO_PTR(id)); | |
1041 | if (!t) | |
1042 | return 0; | |
1043 | ||
1044 | *found = t; | |
1045 | return 1; | |
1046 | } | |
1047 | ||
1048 | static int transfer_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { | |
1049 | _cleanup_strv_free_ char **l = NULL; | |
1050 | Manager *m = userdata; | |
1051 | Transfer *t; | |
1052 | unsigned k = 0; | |
1053 | Iterator i; | |
1054 | ||
1055 | l = new0(char*, hashmap_size(m->transfers) + 1); | |
1056 | if (!l) | |
1057 | return -ENOMEM; | |
1058 | ||
1059 | HASHMAP_FOREACH(t, m->transfers, i) { | |
1060 | ||
1061 | l[k] = strdup(t->object_path); | |
1062 | if (!l[k]) | |
1063 | return -ENOMEM; | |
1064 | ||
1065 | k++; | |
1066 | } | |
1067 | ||
1068 | *nodes = TAKE_PTR(l); | |
1069 | ||
1070 | return 1; | |
1071 | } | |
1072 | ||
1073 | static int manager_add_bus_objects(Manager *m) { | |
1074 | int r; | |
1075 | ||
1076 | assert(m); | |
1077 | ||
1078 | r = sd_bus_add_object_vtable(m->bus, NULL, "/org/freedesktop/import1", "org.freedesktop.import1.Manager", manager_vtable, m); | |
1079 | if (r < 0) | |
1080 | return log_error_errno(r, "Failed to register object: %m"); | |
1081 | ||
1082 | r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/import1/transfer", "org.freedesktop.import1.Transfer", transfer_vtable, transfer_object_find, m); | |
1083 | if (r < 0) | |
1084 | return log_error_errno(r, "Failed to register object: %m"); | |
1085 | ||
1086 | r = sd_bus_add_node_enumerator(m->bus, NULL, "/org/freedesktop/import1/transfer", transfer_node_enumerator, m); | |
1087 | if (r < 0) | |
1088 | return log_error_errno(r, "Failed to add transfer enumerator: %m"); | |
1089 | ||
1090 | r = sd_bus_request_name_async(m->bus, NULL, "org.freedesktop.import1", 0, NULL, NULL); | |
1091 | if (r < 0) | |
1092 | return log_error_errno(r, "Failed to request name: %m"); | |
1093 | ||
1094 | r = sd_bus_attach_event(m->bus, m->event, 0); | |
1095 | if (r < 0) | |
1096 | return log_error_errno(r, "Failed to attach bus to event loop: %m"); | |
1097 | ||
1098 | return 0; | |
1099 | } | |
1100 | ||
1101 | static bool manager_check_idle(void *userdata) { | |
1102 | Manager *m = userdata; | |
1103 | ||
1104 | return hashmap_isempty(m->transfers); | |
1105 | } | |
1106 | ||
1107 | static int manager_run(Manager *m) { | |
1108 | assert(m); | |
1109 | ||
1110 | return bus_event_loop_with_idle( | |
1111 | m->event, | |
1112 | m->bus, | |
1113 | "org.freedesktop.import1", | |
1114 | DEFAULT_EXIT_USEC, | |
1115 | manager_check_idle, | |
1116 | m); | |
1117 | } | |
1118 | ||
1119 | int main(int argc, char *argv[]) { | |
1120 | _cleanup_(manager_unrefp) Manager *m = NULL; | |
1121 | int r; | |
1122 | ||
1123 | log_set_target(LOG_TARGET_AUTO); | |
1124 | log_parse_environment(); | |
1125 | log_open(); | |
1126 | ||
1127 | umask(0022); | |
1128 | ||
1129 | if (argc != 1) { | |
1130 | log_error("This program takes no arguments."); | |
1131 | r = -EINVAL; | |
1132 | goto finish; | |
1133 | } | |
1134 | ||
1135 | assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0); | |
1136 | ||
1137 | r = manager_new(&m); | |
1138 | if (r < 0) { | |
1139 | log_error_errno(r, "Failed to allocate manager object: %m"); | |
1140 | goto finish; | |
1141 | } | |
1142 | ||
1143 | r = manager_add_bus_objects(m); | |
1144 | if (r < 0) | |
1145 | goto finish; | |
1146 | ||
1147 | r = manager_run(m); | |
1148 | if (r < 0) { | |
1149 | log_error_errno(r, "Failed to run event loop: %m"); | |
1150 | goto finish; | |
1151 | } | |
1152 | ||
1153 | finish: | |
1154 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
1155 | } |