Line data Source code
1 : #include "../burp.h"
2 : #include "../action.h"
3 : #include "../asfd.h"
4 : #include "../async.h"
5 : #include "../cmd.h"
6 : #include "../cntr.h"
7 : #include "../handy.h"
8 : #include "../fsops.h"
9 : #include "../iobuf.h"
10 : #include "../lock.h"
11 : #include "../log.h"
12 : #include "../regexp.h"
13 : #include "../run_script.h"
14 : #include "backup.h"
15 : #include "delete.h"
16 : #include "diff.h"
17 : #include "list.h"
18 : #include "protocol2/restore.h"
19 : #include "restore.h"
20 : #include "rubble.h"
21 : #include "sdirs.h"
22 : #include "run_action.h"
23 : #include "timestamp.h"
24 :
25 : // FIX THIS: Somewhat haphazard.
26 : /* Return 0 for everything OK. -1 for error, or 1 to mean that there was
27 : another process that has the lock. */
28 2 : static int get_lock_sdirs_for_write(struct asfd *asfd, struct sdirs *sdirs)
29 : {
30 : struct stat statp;
31 :
32 : // Make sure the lock directory exists.
33 2 : if(mkpath(&sdirs->lock_storage_for_write->path, sdirs->lockdir))
34 : {
35 0 : asfd->write_str(asfd, CMD_ERROR, "problem with lock directory");
36 0 : goto error;
37 : }
38 :
39 2 : lock_get(sdirs->lock_storage_for_write);
40 2 : switch(sdirs->lock_storage_for_write->status)
41 : {
42 : case GET_LOCK_GOT: break;
43 : case GET_LOCK_NOT_GOT:
44 0 : if(!lstat(sdirs->finishing, &statp))
45 : {
46 0 : char msg[256]="";
47 0 : logp("finalising previous backup\n");
48 0 : snprintf(msg, sizeof(msg),
49 : "Finalising previous backup of client. "
50 : "Please try again later.");
51 0 : asfd->write_str(asfd, CMD_ERROR, msg);
52 : }
53 : else
54 : {
55 0 : logp("Another instance of client is already running.\n");
56 0 : asfd->write_str(asfd, CMD_ERROR,
57 : "another instance is already running");
58 : }
59 : goto lockedout;
60 : case GET_LOCK_ERROR:
61 : default:
62 0 : logp("Problem with lock file on server: %s\n",
63 : sdirs->lock_storage_for_write->path);
64 0 : asfd->write_str(asfd, CMD_ERROR,
65 : "problem with lock file on server");
66 0 : goto error;
67 : }
68 :
69 : return 0;
70 : lockedout:
71 : return 1;
72 : error:
73 : return -1;
74 : }
75 :
76 : static int client_can_generic(struct conf **cconfs, enum conf_opt o)
77 : {
78 5 : return get_int(cconfs[o]);
79 : }
80 :
81 0 : int client_can_monitor(struct conf **cconfs)
82 : {
83 0 : return client_can_generic(cconfs, OPT_CLIENT_CAN_MONITOR);
84 : }
85 :
86 1 : static int client_can_restore(struct conf **cconfs)
87 : {
88 1 : const char *restore_path=get_string(cconfs[OPT_RESTORE_PATH]);
89 :
90 : // If there is a restore file on the server, it is always OK.
91 1 : if(restore_path && is_reg_lstat(restore_path)==1)
92 : {
93 : // Remove the file.
94 0 : unlink(restore_path);
95 0 : return 1;
96 : }
97 :
98 1 : return client_can_generic(cconfs, OPT_CLIENT_CAN_RESTORE);
99 : }
100 :
101 1 : static void maybe_do_notification(struct asfd *asfd,
102 : int status, const char *clientdir,
103 : const char *storagedir, const char *filename,
104 : const char *brv, struct conf **cconfs)
105 : {
106 1 : int a=0;
107 : const char *args[12];
108 1 : struct cntr *cntr=get_cntr(cconfs);
109 1 : args[a++]=NULL; // Fill in the script name later.
110 1 : args[a++]=get_string(cconfs[OPT_CNAME]);
111 1 : args[a++]=clientdir;
112 1 : args[a++]=storagedir;
113 1 : args[a++]=filename;
114 1 : args[a++]=brv;
115 1 : if(status)
116 : {
117 1 : args[0]=get_string(cconfs[OPT_N_FAILURE_SCRIPT]);
118 1 : args[a++]="0";
119 1 : args[a++]=NULL;
120 1 : run_script(asfd, args, get_strlist(cconfs[OPT_N_FAILURE_ARG]),
121 : cconfs, 1, 1, 1);
122 : }
123 0 : else if((get_int(cconfs[OPT_N_SUCCESS_WARNINGS_ONLY])
124 0 : && cntr->ent[CMD_WARNING]->count > 0)
125 0 : || (get_int(cconfs[OPT_N_SUCCESS_CHANGES_ONLY])
126 0 : && cntr->ent[CMD_TOTAL]->changed > 0)
127 0 : || (!get_int(cconfs[OPT_N_SUCCESS_WARNINGS_ONLY])
128 0 : && !get_int(cconfs[OPT_N_SUCCESS_CHANGES_ONLY])))
129 : {
130 0 : char warnings[32]="";
131 0 : snprintf(warnings, sizeof(warnings), "%" PRIu64,
132 0 : cntr->ent[CMD_WARNING]->count);
133 0 : args[0]=get_string(cconfs[OPT_N_SUCCESS_SCRIPT]);
134 0 : args[a++]=warnings;
135 0 : args[a++]=NULL;
136 0 : run_script(asfd, args, get_strlist(cconfs[OPT_N_SUCCESS_ARG]),
137 : cconfs, 1, 1, 1);
138 : }
139 1 : }
140 :
141 12 : static int parse_restore_str(const char *str, enum action *act,
142 : char **backupnostr, char **restoreregex)
143 : {
144 12 : int ret=-1;
145 12 : char *cp=NULL;
146 12 : char *copy=NULL;
147 :
148 12 : if(!str)
149 : {
150 1 : logp("NULL passed to %s\n", __func__);
151 1 : goto end;
152 : }
153 :
154 11 : if(!(copy=strdup_w(str, __func__)))
155 : goto end;
156 :
157 11 : if(!strncmp_w(copy, "restore "))
158 4 : *act=ACTION_RESTORE;
159 7 : else if(!strncmp_w(copy, "verify "))
160 4 : *act=ACTION_VERIFY;
161 : else
162 : {
163 3 : logp("Could not parse %s in %s\n", copy, __func__);
164 3 : goto end;
165 : }
166 :
167 8 : if(!(cp=strchr(copy, ' ')))
168 : {
169 0 : logp("Could not parse %s in %s\n", copy, __func__);
170 0 : goto end;
171 : }
172 8 : cp++;
173 8 : if(!(*backupnostr=strdup_w(cp, __func__)))
174 : goto end;
175 8 : if((cp=strchr(*backupnostr, ':')))
176 : {
177 4 : *cp='\0';
178 4 : cp++;
179 4 : if(!(*restoreregex=strdup_w(cp, __func__)))
180 : goto end;
181 : }
182 :
183 : ret=0;
184 : end:
185 12 : free_w(©);
186 12 : return ret;
187 : }
188 :
189 : #ifndef UTEST
190 : static
191 : #endif
192 12 : int parse_restore_str_and_set_confs(const char *str, enum action *act,
193 : struct conf **cconfs)
194 : {
195 12 : int ret=-1;
196 12 : char *backupnostr=NULL;
197 12 : char *restoreregex=NULL;
198 :
199 12 : if(parse_restore_str(str, act, &backupnostr, &restoreregex))
200 : goto end;
201 :
202 8 : if(set_string(cconfs[OPT_BACKUP], backupnostr))
203 : goto end;
204 8 : if(restoreregex && *restoreregex
205 2 : && set_string(cconfs[OPT_REGEX], restoreregex))
206 : goto end;
207 : ret=0;
208 : end:
209 12 : free_w(&backupnostr);
210 12 : free_w(&restoreregex);
211 12 : return ret;
212 : }
213 :
214 2 : static int run_restore(struct asfd *asfd,
215 : struct sdirs *sdirs, struct conf **cconfs, int srestore)
216 : {
217 2 : int ret=-1;
218 2 : char *dir_for_notify=NULL;
219 2 : enum action act=ACTION_RESTORE;
220 2 : struct iobuf *rbuf=asfd->rbuf;
221 2 : const char *cname=get_string(cconfs[OPT_CNAME]);
222 :
223 2 : if(parse_restore_str_and_set_confs(rbuf->buf, &act, cconfs))
224 : goto end;
225 :
226 2 : iobuf_free_content(rbuf);
227 :
228 2 : if(act==ACTION_RESTORE)
229 : {
230 : int r;
231 1 : if((r=client_can_restore(cconfs))<0)
232 : goto end;
233 1 : else if(!r)
234 : {
235 0 : logp("Not allowing restore of %s\n", cname);
236 0 : if(!asfd->write_str(asfd, CMD_GEN,
237 0 : "Client restore is not allowed")) ret=0;
238 : goto end;
239 : }
240 : }
241 2 : if(act==ACTION_VERIFY
242 1 : && !(client_can_generic(cconfs, OPT_CLIENT_CAN_VERIFY)))
243 : {
244 0 : logp("Not allowing verify of %s\n", cname);
245 0 : if(!asfd->write_str(asfd, CMD_GEN,
246 0 : "Client verify is not allowed")) ret=0;
247 : goto end;
248 : }
249 :
250 2 : if(asfd->write_str(asfd, CMD_GEN, "ok"))
251 : goto end;
252 :
253 2 : ret=do_restore_server(asfd, sdirs, act,
254 : srestore, &dir_for_notify, cconfs);
255 2 : if(dir_for_notify)
256 0 : maybe_do_notification(asfd, ret,
257 0 : sdirs->client, dir_for_notify,
258 : act==ACTION_RESTORE?"restorelog":"verifylog",
259 0 : act==ACTION_RESTORE?"restore":"verify",
260 : cconfs);
261 : end:
262 2 : free_w(&dir_for_notify);
263 2 : return ret;
264 : }
265 :
266 1 : static int run_delete(struct asfd *asfd,
267 : struct sdirs *sdirs, struct conf **cconfs)
268 : {
269 1 : char *backupno=NULL;
270 1 : struct iobuf *rbuf=asfd->rbuf;
271 1 : const char *cname=get_string(cconfs[OPT_CNAME]);
272 1 : if(!client_can_generic(cconfs, OPT_CLIENT_CAN_DELETE))
273 : {
274 0 : logp("Not allowing delete of %s\n", cname);
275 0 : asfd->write_str(asfd, CMD_GEN, "Client delete is not allowed");
276 0 : return -1;
277 : }
278 1 : backupno=rbuf->buf+strlen("delete ");
279 1 : return do_delete_server(asfd, sdirs,
280 : get_cntr(cconfs), cname, backupno,
281 1 : get_string(cconfs[OPT_MANUAL_DELETE]));
282 : }
283 :
284 1 : static int run_list(struct asfd *asfd,
285 : struct sdirs *sdirs, struct conf **cconfs)
286 : {
287 1 : int ret=-1;
288 1 : char *cp=NULL;
289 1 : char *backupno=NULL;
290 1 : char *browsedir=NULL;
291 1 : char *listregex=NULL;
292 1 : struct iobuf *rbuf=asfd->rbuf;
293 :
294 1 : if(!client_can_generic(cconfs, OPT_CLIENT_CAN_LIST))
295 : {
296 0 : logp("Not allowing list of %s\n",
297 : get_string(cconfs[OPT_CNAME]));
298 0 : asfd->write_str(asfd, CMD_GEN, "Client list is not allowed");
299 0 : goto end;
300 : }
301 :
302 1 : if(!strncmp_w(rbuf->buf, "list "))
303 : {
304 1 : if((cp=strchr(rbuf->buf, ':')))
305 : {
306 0 : *cp='\0';
307 0 : if(!(listregex=strdup_w(cp+1, __func__)))
308 : goto end;
309 : }
310 1 : if(!(backupno=strdup_w(rbuf->buf+strlen("list "), __func__)))
311 : goto end;
312 :
313 : }
314 0 : else if(!strncmp_w(rbuf->buf, "listb "))
315 : {
316 0 : if((cp=strchr(rbuf->buf, ':')))
317 : {
318 0 : *cp='\0';
319 0 : if(!(browsedir=strdup_w(cp+1, __func__)))
320 : goto end;
321 : }
322 0 : strip_trailing_slashes(&browsedir);
323 0 : if(!(backupno=strdup_w(rbuf->buf+strlen("listb "), __func__)))
324 : goto end;
325 : }
326 1 : if(asfd->write_str(asfd, CMD_GEN, "ok")) goto end;
327 :
328 1 : iobuf_free_content(asfd->rbuf);
329 :
330 1 : if(list_server_init(asfd, sdirs, get_cntr(cconfs),
331 : get_protocol(cconfs), backupno, listregex, browsedir))
332 : goto end;
333 1 : ret=do_list_server();
334 : end:
335 1 : free_w(&backupno);
336 1 : free_w(&browsedir);
337 1 : free_w(&listregex);
338 1 : list_server_free();
339 1 : return ret;
340 : }
341 :
342 1 : static int run_diff(struct asfd *asfd,
343 : struct sdirs *sdirs, struct conf **cconfs)
344 : {
345 1 : int ret=-1;
346 1 : char *backup1=NULL;
347 1 : char *backup2=NULL;
348 1 : struct iobuf *rbuf=asfd->rbuf;
349 :
350 1 : if(!client_can_generic(cconfs, OPT_CLIENT_CAN_DIFF))
351 : {
352 0 : logp("Not allowing diff of %s\n",
353 : get_string(cconfs[OPT_CNAME]));
354 0 : asfd->write_str(asfd, CMD_GEN, "Client diff is not allowed");
355 0 : goto end;
356 : }
357 :
358 1 : if(!strncmp_w(rbuf->buf, "diff "))
359 : {
360 : char *cp;
361 1 : if((cp=strchr(rbuf->buf, ':')))
362 : {
363 0 : *cp='\0';
364 0 : if(!(backup2=strdup_w(cp+1, __func__)))
365 : goto end;
366 : }
367 1 : if(!(backup1=strdup_w(rbuf->buf+strlen("diff "), __func__)))
368 : goto end;
369 : }
370 1 : if(asfd->write_str(asfd, CMD_GEN, "ok")) goto end;
371 :
372 1 : iobuf_free_content(asfd->rbuf);
373 :
374 1 : ret=do_diff_server(asfd, sdirs,
375 : get_cntr(cconfs), get_protocol(cconfs), backup1, backup2);
376 : end:
377 1 : free_w(&backup1);
378 1 : free_w(&backup2);
379 1 : return ret;
380 : }
381 :
382 : static int unknown_command(struct asfd *asfd, const char *func)
383 : {
384 2 : iobuf_log_unexpected(asfd->rbuf, func);
385 2 : asfd->write_str(asfd, CMD_ERROR, "unknown command");
386 : return -1;
387 : }
388 :
389 0 : static const char *buf_to_notify_str(struct iobuf *rbuf)
390 : {
391 0 : const char *buf=rbuf->buf;
392 0 : if(!strncmp_w(buf, "backup")) return "backup";
393 0 : else if(!strncmp_w(buf, "restore")) return "restore";
394 0 : else if(!strncmp_w(buf, "verify")) return "verify";
395 0 : else if(!strncmp_w(buf, "delete")) return "delete";
396 0 : else if(!strncmp_w(buf, "list")) return "list";
397 : else return "unknown";
398 : }
399 :
400 9 : static int maybe_write_first_created_file(struct sdirs *sdirs)
401 : {
402 9 : char tstmp[48]="";
403 9 : if(is_reg_lstat(sdirs->created)>0
404 9 : || is_lnk_lstat(sdirs->current)>0
405 9 : || is_lnk_lstat(sdirs->currenttmp)>0
406 9 : || is_lnk_lstat(sdirs->working)>0
407 9 : || is_lnk_lstat(sdirs->finishing)>0)
408 : return 0;
409 :
410 9 : if(timestamp_get_new(/*index*/0,
411 : tstmp, sizeof(tstmp),
412 : /*bufforfile*/NULL, /*bs*/0,
413 : /*format*/NULL))
414 : return -1;
415 9 : return timestamp_write(sdirs->created, tstmp);
416 : }
417 :
418 10 : static int run_action_server_do(struct async *as, struct sdirs *sdirs,
419 : const char *incexc, int srestore, int *timer_ret, struct conf **cconfs)
420 : {
421 : int ret;
422 10 : int resume=0;
423 10 : char msg[256]="";
424 10 : struct iobuf *rbuf=as->asfd->rbuf;
425 :
426 : // Make sure some directories exist.
427 10 : if(mkpath(&sdirs->current, sdirs->dedup))
428 : {
429 1 : snprintf(msg, sizeof(msg),
430 : "could not mkpath %s", sdirs->current);
431 1 : log_and_send(as->asfd, msg);
432 1 : return -1;
433 : }
434 :
435 9 : if(maybe_write_first_created_file(sdirs))
436 : return -1;
437 :
438 9 : if(rbuf->cmd!=CMD_GEN)
439 2 : return unknown_command(as->asfd, __func__);
440 :
441 : // List and diff should work well enough without needing to lock
442 : // anything.
443 8 : if(!strncmp_w(rbuf->buf, "list ")
444 7 : || !strncmp_w(rbuf->buf, "listb "))
445 1 : return run_list(as->asfd, sdirs, cconfs);
446 :
447 7 : if(!strncmp_w(rbuf->buf, "diff "))
448 1 : return run_diff(as->asfd, sdirs, cconfs);
449 :
450 : // Old clients will send 'delete', possibly accidentally due to the
451 : // user trying to use the new diff/long diff options.
452 : // Stop them from working, just to be safe.
453 6 : if(!strncmp_w(rbuf->buf, "delete "))
454 : {
455 1 : logp("old style delete from %s denied\n",
456 : get_string(cconfs[OPT_CNAME]));
457 1 : as->asfd->write_str(as->asfd, CMD_ERROR,
458 : "old style delete is not supported on this server");
459 1 : return -1;
460 : }
461 :
462 : // Restore and verify should work well enough by locking only the
463 : // backup directory they are interested in.
464 5 : if(!strncmp_w(rbuf->buf, "restore ")
465 4 : || !strncmp_w(rbuf->buf, "verify "))
466 2 : return run_restore(as->asfd, sdirs, cconfs, srestore);
467 :
468 3 : if(strncmp_w(rbuf->buf, "backup")
469 2 : && strncmp_w(rbuf->buf, "Delete "))
470 2 : return unknown_command(as->asfd, __func__);
471 :
472 : // Beyond this point, only need to deal with backup and delete.
473 : // These require locking out all other backups and deletes.
474 :
475 2 : switch((ret=get_lock_sdirs_for_write(as->asfd, sdirs)))
476 : {
477 : case 0: break; // OK.
478 : case 1: return 1; // Locked out.
479 : default: // Error.
480 0 : maybe_do_notification(as->asfd, ret,
481 : "", "error in get_lock_sdirs()",
482 : "", buf_to_notify_str(rbuf), cconfs);
483 0 : return -1;
484 : }
485 :
486 2 : switch((ret=check_for_rubble_and_clean(as, sdirs,
487 : incexc, &resume, cconfs)))
488 : {
489 : case 0: break; // OK.
490 : case 1: return 1; // Now finalising.
491 : default: // Error.
492 0 : maybe_do_notification(as->asfd, ret,
493 : "", "error in check_for_rubble()",
494 : "", buf_to_notify_str(rbuf), cconfs);
495 0 : return -1;
496 : }
497 :
498 2 : if(!strncmp_w(rbuf->buf, "Delete "))
499 1 : return run_delete(as->asfd, sdirs, cconfs);
500 :
501 : // Only backup action left to deal with.
502 1 : ret=run_backup(as, sdirs,
503 : cconfs, incexc, timer_ret, resume);
504 :
505 : // If this is a backup failure and the client has more servers
506 : // to failover to, do not notify.
507 1 : if(ret
508 1 : && get_int(cconfs[OPT_N_FAILURE_BACKUP_FAILOVERS_LEFT])
509 1 : && get_int(cconfs[OPT_BACKUP_FAILOVERS_LEFT]))
510 : return ret;
511 :
512 1 : if(*timer_ret<0)
513 0 : maybe_do_notification(as->asfd, ret,
514 : "", "error running timer script",
515 : "", "backup", cconfs);
516 1 : else if(!*timer_ret)
517 1 : maybe_do_notification(as->asfd, ret,
518 1 : sdirs->client, sdirs->current,
519 : "log", "backup", cconfs);
520 : return ret;
521 : }
522 :
523 10 : int run_action_server(struct async *as,
524 : const char *incexc, int srestore, int *timer_ret, struct conf **cconfs)
525 : {
526 10 : int ret=-1;
527 10 : struct sdirs *sdirs=NULL;
528 10 : if((sdirs=sdirs_alloc())
529 10 : && !sdirs_init_from_confs(sdirs, cconfs))
530 10 : ret=run_action_server_do(as,
531 : sdirs, incexc, srestore, timer_ret, cconfs);
532 10 : if(sdirs) lock_release(sdirs->lock_storage_for_write);
533 10 : sdirs_free(&sdirs);
534 10 : return ret;
535 : }
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