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1 | /* $Id$ | |
2 | * | |
3 | * The Data Control Manager for Moira. | |
4 | * | |
5 | * Copyright (C) 1987-1998 by the Massachusetts Institute of Technology. | |
6 | * For copying and distribution information, see the file | |
7 | * <mit-copyright.h>. | |
8 | */ | |
9 | ||
10 | #include <mit-copyright.h> | |
11 | #include <moira.h> | |
12 | #include <moira_site.h> | |
13 | #include <moira_schema.h> | |
14 | #include "update.h" | |
15 | ||
16 | #include <sys/param.h> | |
17 | #include <sys/stat.h> | |
18 | #include <sys/wait.h> | |
19 | ||
20 | #include <errno.h> | |
21 | #include <signal.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | EXEC SQL INCLUDE sqlca; | |
28 | void sqlglm(char *, unsigned int *, unsigned int *); | |
29 | ||
30 | RCSID("$Header$"); | |
31 | ||
32 | int generate_service(char *name, int force); | |
33 | void do_hosts(char *service); | |
34 | int dcm_send_file(char *service, char *host, char *target); | |
35 | int dcm_execute(char *service, char *host, char *script); | |
36 | void dbmserr(void); | |
37 | ||
38 | #define SQL_NO_MATCH 1403 | |
39 | #define SOFT_FAIL(x) (((x) == MR_NO_MEM) || ((x) == MR_CANT_CONNECT) || ((x) == MR_CCONFIG) || ((x) == MR_DEADLOCK) || ((x) == MR_BUSY) || ((x) == MR_ABORT)) | |
40 | ||
41 | char whobuf[256], *whoami = whobuf, *db = "moira"; | |
42 | ||
43 | int main(int argc, char **argv) | |
44 | { | |
45 | int i; | |
46 | EXEC SQL BEGIN DECLARE SECTION; | |
47 | char buf[SERVERS_NAME_SIZE], *name; | |
48 | int enable; | |
49 | EXEC SQL END DECLARE SECTION; | |
50 | struct save_queue *sq; | |
51 | int status; | |
52 | ||
53 | if (strchr(argv[0], '/')) | |
54 | strcpy(whoami, strrchr(argv[0], '/') + 1); | |
55 | else strcpy(whoami, argv[0]); | |
56 | umask(7); | |
57 | ||
58 | setvbuf(stderr, NULL, _IOLBF, BUFSIZ); | |
59 | setvbuf(stdout, NULL, _IOLBF, BUFSIZ); | |
60 | ||
61 | initialize_sms_error_table(); | |
62 | initialize_krb_error_table(); | |
63 | ||
64 | /* if services were specified on the command line, do just those ones */ | |
65 | if (argc > 1) | |
66 | { | |
67 | for (i = 1; i < argc; i++) | |
68 | { | |
69 | if (generate_service(argv[i], 1)) | |
70 | do_hosts(argv[i]); | |
71 | } | |
72 | exit(0); | |
73 | } | |
74 | ||
75 | /* if DCM is not enabled, exit after logging */ | |
76 | if (!access(NODCMFILE, F_OK)) | |
77 | { | |
78 | printf("/etc/nodcm exists -- exiting\n"); | |
79 | exit(1); | |
80 | } | |
81 | ||
82 | EXEC SQL WHENEVER SQLERROR DO dbmserr(); | |
83 | ||
84 | EXEC SQL CONNECT :db IDENTIFIED BY :db; | |
85 | ||
86 | EXEC SQL SELECT value INTO :enable FROM numvalues WHERE name = 'dcm_enable'; | |
87 | if (enable == 0) | |
88 | { | |
89 | printf("dcm_enable not set -- exiting\n"); | |
90 | exit(1); | |
91 | } | |
92 | ||
93 | /* fetch list of services */ | |
94 | EXEC SQL DECLARE csr_svc CURSOR FOR SELECT LOWER(name) FROM servers | |
95 | WHERE enable = 1 AND harderror = 0 AND update_int > 0; | |
96 | EXEC SQL OPEN csr_svc; | |
97 | sq = sq_create(); | |
98 | while (1) | |
99 | { | |
100 | EXEC SQL FETCH csr_svc INTO :buf; | |
101 | if (sqlca.sqlcode) | |
102 | break; | |
103 | ||
104 | sq_save_data(sq, strdup(strtrim(buf))); | |
105 | } | |
106 | EXEC SQL CLOSE csr_svc; | |
107 | /* we will repeatedly open and close the db since it seems to get | |
108 | upset if you keep it open across a fork */ | |
109 | EXEC SQL COMMIT RELEASE; | |
110 | ||
111 | /* Now run through list */ | |
112 | while (sq_get_data(sq, &name)) | |
113 | { | |
114 | if (generate_service(name, 0)) | |
115 | { | |
116 | switch (fork()) | |
117 | { | |
118 | case -1: | |
119 | com_err(whoami, errno, "forking for service %s -- exiting", | |
120 | name); | |
121 | exit(1); | |
122 | case 0: | |
123 | sprintf(strchr(whoami, '\0'), " (%s:%ld)", name, (long)getpid()); | |
124 | do_hosts(name); | |
125 | com_err(whoami, 0, "exiting"); | |
126 | exit(0); | |
127 | default: | |
128 | break; | |
129 | } | |
130 | } | |
131 | } | |
132 | ||
133 | com_err(whoami, 0, "All files generated. Waiting for children to exit"); | |
134 | while (waitpid(0, &status, 0) > 0) | |
135 | ; | |
136 | com_err(whoami, 0, "exiting"); | |
137 | exit(0); | |
138 | } | |
139 | ||
140 | int generate_service(char *name, int force) | |
141 | { | |
142 | EXEC SQL BEGIN DECLARE SECTION; | |
143 | int interval, dfcheck, status; | |
144 | time_t now; | |
145 | const char *errmsg; | |
146 | EXEC SQL END DECLARE SECTION; | |
147 | char dfgen_prog[MAXPATHLEN], dfgen_cmd[2 * MAXPATHLEN]; | |
148 | struct sigaction action, prevaction; | |
149 | int waits; | |
150 | ||
151 | EXEC SQL CONNECT :db IDENTIFIED BY :db; | |
152 | ||
153 | EXEC SQL SELECT update_int, dfcheck INTO :interval, :dfcheck | |
154 | FROM servers WHERE name = UPPER(:name); | |
155 | if (sqlca.sqlcode == SQL_NO_MATCH) | |
156 | { | |
157 | com_err(whoami, 0, "No such service `%s'", name); | |
158 | EXEC SQL COMMIT RELEASE; | |
159 | return 0; | |
160 | } | |
161 | ||
162 | time(&now); | |
163 | ||
164 | if ((interval * 60 + dfcheck < now) || force) | |
165 | { | |
166 | sprintf(dfgen_prog, "%s/%s.gen", BIN_DIR, name); | |
167 | if (access(dfgen_prog, F_OK) != 0) | |
168 | { | |
169 | com_err(whoami, 0, "prog %s doesn't exist", dfgen_prog); | |
170 | EXEC SQL COMMIT RELEASE; | |
171 | return 0; | |
172 | } | |
173 | sprintf(dfgen_cmd, "exec %s %s/%s.out", dfgen_prog, DCM_DIR, name); | |
174 | com_err(whoami, 0, "running %s", dfgen_prog); | |
175 | ||
176 | EXEC SQL WHENEVER SQLERROR GOTO gen_cleanup; | |
177 | ||
178 | EXEC SQL UPDATE servers SET inprogress = 1 | |
179 | WHERE name = UPPER(:name); | |
180 | EXEC SQL COMMIT; | |
181 | ||
182 | action.sa_flags = 0; | |
183 | sigemptyset(&action.sa_mask); | |
184 | action.sa_handler = SIG_DFL; | |
185 | sigaction(SIGCHLD, &action, &prevaction); | |
186 | waits = system(dfgen_cmd); | |
187 | sigaction(SIGCHLD, &prevaction, NULL); | |
188 | if (WIFSIGNALED(waits)) | |
189 | { | |
190 | status = MR_COREDUMP; | |
191 | com_err(whoami, status, " %s exited on signal %d", | |
192 | dfgen_prog, WTERMSIG(waits)); | |
193 | } | |
194 | else if (WEXITSTATUS(waits)) | |
195 | { | |
196 | /* extract the process's exit value */ | |
197 | status = WEXITSTATUS(waits) + ERROR_TABLE_BASE_sms; | |
198 | if (status != MR_NO_CHANGE) | |
199 | com_err(whoami, status, "in %s", dfgen_prog); | |
200 | } | |
201 | else | |
202 | status = MR_SUCCESS; | |
203 | ||
204 | if (status == MR_SUCCESS) | |
205 | { | |
206 | EXEC SQL UPDATE servers SET dfgen = :now, dfcheck = :now, | |
207 | inprogress = 0 WHERE name = UPPER(:name); | |
208 | EXEC SQL COMMIT RELEASE; | |
209 | return 1; | |
210 | } | |
211 | else if (status == MR_NO_CHANGE) | |
212 | { | |
213 | EXEC SQL UPDATE servers SET dfcheck = :now, inprogress = 0 | |
214 | WHERE name = UPPER(:name); | |
215 | } | |
216 | else if (SOFT_FAIL(status)) | |
217 | { | |
218 | errmsg = error_message(status); | |
219 | EXEC SQL UPDATE servers SET errmsg = :errmsg, inprogress = 0 | |
220 | WHERE name = UPPER(:name); | |
221 | } | |
222 | else /* HARD_FAIL(status) */ | |
223 | { | |
224 | errmsg = error_message(status); | |
225 | EXEC SQL UPDATE servers SET harderror = :status, errmsg = :errmsg, | |
226 | inprogress = 0 WHERE name = UPPER(:name); | |
227 | critical_alert("DCM", "DCM building config files for %s: %s", | |
228 | name, errmsg); | |
229 | } | |
230 | } | |
231 | EXEC SQL COMMIT RELEASE; | |
232 | return 0; | |
233 | ||
234 | gen_cleanup: | |
235 | EXEC SQL WHENEVER SQLERROR DO dbmserr(); | |
236 | EXEC SQL UPDATE servers SET inprogress = 0, harderror = MR_INTERNAL, | |
237 | errmsg = 'DBMS Internal Error' WHERE name = UPPER(:name); | |
238 | dbmserr(); | |
239 | } | |
240 | ||
241 | void do_hosts(char *service) | |
242 | { | |
243 | EXEC SQL BEGIN DECLARE SECTION; | |
244 | char type[SERVERS_TYPE_SIZE], host[MACHINE_NAME_SIZE]; | |
245 | char target[SERVERS_TARGET_FILE_SIZE], script[SERVERS_SCRIPT_SIZE]; | |
246 | const char *errmsg; | |
247 | int status = 0, dfgen, replicated, mid; | |
248 | time_t now; | |
249 | EXEC SQL END DECLARE SECTION; | |
250 | struct save_queue sq; | |
251 | ||
252 | time(&now); | |
253 | mr_init(); | |
254 | ||
255 | EXEC SQL CONNECT :db IDENTIFIED BY :db; | |
256 | ||
257 | EXEC SQL SELECT dfgen, type, target_file, script | |
258 | INTO :dfgen, :type, :target, :script | |
259 | FROM servers WHERE name = UPPER(:service); | |
260 | replicated = !strncmp(type, "REPLICAT", 8); | |
261 | strtrim(target); | |
262 | strtrim(script); | |
263 | ||
264 | EXEC SQL DECLARE csr_hst1 CURSOR FOR | |
265 | SELECT m.name, m.mach_id FROM machine m, serverhosts sh | |
266 | WHERE sh.service = UPPER(:service) | |
267 | AND sh.enable = 1 AND sh.hosterror = 0 | |
268 | AND sh.lts < :dfgen AND sh.mach_id = m.mach_id; | |
269 | EXEC SQL OPEN csr_hst1; | |
270 | sq = sq_create(); | |
271 | while (1) | |
272 | { | |
273 | EXEC SQL FETCH csr_hst1 INTO :host, mid; | |
274 | if (sqlca.sqlcode == SQL_NO_MATCH) | |
275 | break; | |
276 | ||
277 | sq_save_data(sq, strdup(strtrim(host))); | |
278 | sq_save_data(sq, (void *)mid); | |
279 | } | |
280 | EXEC SQL CLOSE csr_hst1; | |
281 | ||
282 | EXEC SQL WHENEVER SQLERROR GOTO host_cleanup; | |
283 | while (sq_get_data(sq, &name)) | |
284 | { | |
285 | sq_get_data(sq, &mid); | |
286 | com_err(whoami, 0, "sending %s data to %s", service, name); | |
287 | EXEC SQL UPDATE serverhosts SET inprogress = 1 | |
288 | WHERE service = UPPER(:service) AND mach_id = :mid; | |
289 | EXEC SQL COMMIT; | |
290 | status = dcm_send_file(service, name, target); | |
291 | if (status) | |
292 | { | |
293 | errmsg = error_message(status); | |
294 | EXEC SQL UPDATE serverhosts SET hosterrmsg = :errmsg, | |
295 | inprogress = 0, success = 0, ltt = :now | |
296 | WHERE service = UPPER(:service) AND mach_id = :mach_id; | |
297 | if (!SOFT_FAIL(status)) | |
298 | { | |
299 | EXEC SQL UPDATE serverhosts SET hosterror = :status | |
300 | WHERE CURRENT OF csr_hst1; | |
301 | critical_alert("DCM", "DCM updating %s:%s: %s", | |
302 | service, name, errmsg); | |
303 | } | |
304 | EXEC SQL COMMIT; | |
305 | ||
306 | if (replicated) | |
307 | break; | |
308 | } | |
309 | } | |
310 | sq_destroy(sq); | |
311 | ||
312 | if (status == MR_SUCCESS || !replicated) | |
313 | { | |
314 | EXEC SQL DECLARE csr_hst2 CURSOR FOR | |
315 | SELECT m.name, m.mach_id FROM machine m, serverhosts sh | |
316 | WHERE sh.service = UPPER(:service) AND sh.inprogress = 1 | |
317 | AND sh.mach_id = m.mach_id; | |
318 | EXEC SQL OPEN csr_hst2; | |
319 | sq = sq_create(); | |
320 | ||
321 | while (1) | |
322 | { | |
323 | EXEC SQL FETCH csr_hst2 INTO :host, :mid; | |
324 | if (sqlca.sqlcode == SQL_NO_MATCH) | |
325 | break; | |
326 | ||
327 | sq_save_data(sq, strdup(strtrim(host))); | |
328 | sq_save_data(sq, (void *)mid); | |
329 | } | |
330 | EXEC SQL CLOSE csr_hst2; | |
331 | ||
332 | while (sq_get_data(sq, &name)) | |
333 | { | |
334 | sq_get_data(sq, &mid); | |
335 | ||
336 | com_err(whoami, 0, "executing instructions on %s", name); | |
337 | status = dcm_execute(service, name, script); | |
338 | if (status) | |
339 | { | |
340 | errmsg = error_message(status); | |
341 | EXEC SQL UPDATE serverhosts SET hosterrmsg = :errmsg, | |
342 | inprogress = 0, success = 0, ltt = :now | |
343 | WHERE service = UPPER(:service) AND mach_id = :mid; | |
344 | if (!SOFT_FAIL(status)) | |
345 | { | |
346 | EXEC SQL UPDATE serverhosts SET hosterror = :status | |
347 | WHERE service = UPPER(:service) AND mach_id = :mid; | |
348 | critical_alert("DCM", "DCM updating %s:%s: %s", | |
349 | service, host, errmsg); | |
350 | } | |
351 | ||
352 | if (replicated) | |
353 | { | |
354 | /* We're giving up, so clear the inprogress flag on | |
355 | any hosts in this service we haven't gotten to yet */ | |
356 | EXEC SQL UPDATE serverhosts SET inprogress = 0 | |
357 | WHERE service = UPPER(:service); | |
358 | break; | |
359 | } | |
360 | } | |
361 | else | |
362 | { | |
363 | EXEC SQL UPDATE serverhosts SET inprogress = 0, ltt = :now, | |
364 | lts = :now, success = 1 WHERE service = UPPER(:service) | |
365 | AND mach_id = :mid; | |
366 | } | |
367 | EXEC SQL COMMIT; | |
368 | } | |
369 | EXEC SQL CLOSE csr_hst2; | |
370 | } | |
371 | ||
372 | EXEC SQL WHENEVER SQLERROR DO dbmserr(); | |
373 | if (status && replicated) | |
374 | { | |
375 | EXEC SQL UPDATE servers SET harderror = :status, errmsg = :errmsg | |
376 | WHERE name = UPPER(:service); | |
377 | } | |
378 | ||
379 | EXEC SQL COMMIT RELEASE; | |
380 | return; | |
381 | ||
382 | host_cleanup: | |
383 | EXEC SQL UPDATE serverhosts SET inprogress = 0, success = 0, ltt = :now, | |
384 | hosterror = MR_INTERNAL, hosterrmsg = 'DBMS Internal Error' | |
385 | WHERE service = UPPER(:service) AND mach_id = :mid; | |
386 | if (replicated) | |
387 | { | |
388 | EXEC SQL UPDATE servers SET harderror = MR_INTERNAL, | |
389 | errmsg = 'DBMS Internal Error' WHERE name = UPPER(:service); | |
390 | } | |
391 | } | |
392 | ||
393 | int dcm_send_file(char *service, char *host, char *target) | |
394 | { | |
395 | char data[MAXPATHLEN]; | |
396 | int code, conn; | |
397 | ||
398 | conn = mr_connect_internal(host, "moira_update"); | |
399 | if (!conn) | |
400 | { | |
401 | com_err(whoami, errno, "can't connect to %s", host); | |
402 | return MR_CANT_CONNECT; | |
403 | } | |
404 | ||
405 | code = send_auth(conn, host); | |
406 | if (code) | |
407 | { | |
408 | com_err(whoami, code, "authenticating to %s", host); | |
409 | goto done; | |
410 | } | |
411 | ||
412 | sprintf(data, "%s/%s.out", DCM_DIR, service); | |
413 | code = send_file(conn, data, target, 0); | |
414 | if (code) | |
415 | com_err(whoami, code, "sending data to %s", host); | |
416 | ||
417 | done: | |
418 | send_quit(conn); | |
419 | close(conn); | |
420 | return code; | |
421 | } | |
422 | ||
423 | int dcm_execute(char *service, char *host, char *script) | |
424 | { | |
425 | char inst[MAXPATHLEN]; | |
426 | int code, conn; | |
427 | ||
428 | conn = mr_connect_internal(host, "moira_update"); | |
429 | if (!conn) | |
430 | { | |
431 | com_err(whoami, errno, "can't connect to %s", host); | |
432 | return MR_CANT_CONNECT; | |
433 | } | |
434 | ||
435 | code = send_auth(conn, host); | |
436 | if (code) | |
437 | { | |
438 | com_err(whoami, code, "authenticating to %s", host); | |
439 | goto done; | |
440 | } | |
441 | ||
442 | sprintf(inst, "/tmp/moira-update.XXXXXX"); | |
443 | mktemp(inst); | |
444 | code = send_file(conn, script, inst, 0); | |
445 | if (code) | |
446 | { | |
447 | com_err(whoami, code, "sending instructions to %s", host); | |
448 | goto done; | |
449 | } | |
450 | ||
451 | code = execute(conn, inst); | |
452 | if (code) | |
453 | com_err(whoami, code, "executing instructions on %s", host); | |
454 | ||
455 | done: | |
456 | send_quit(conn); | |
457 | close(conn); | |
458 | return code; | |
459 | } | |
460 | ||
461 | void dbmserr(void) | |
462 | { | |
463 | EXEC SQL BEGIN DECLARE SECTION; | |
464 | char err_msg[256]; | |
465 | EXEC SQL END DECLARE SECTION; | |
466 | int bufsize = 256, msglength = 0; | |
467 | ||
468 | sqlglm(err_msg, &bufsize, &msglength); | |
469 | err_msg[msglength] = '\0'; | |
470 | com_err(whoami, 0, "Encountered SQL error:\n%s", err_msg); | |
471 | com_err(whoami, 0, "exiting"); | |
472 | exit(1); | |
473 | } |