3 * Bacula Director Job processing routines
5 * Kern Sibbald, October MM
10 Copyright (C) 2000-2003 Kern Sibbald and John Walker
12 This program is free software; you can redistribute it and/or
13 modify it under the terms of the GNU General Public License as
14 published by the Free Software Foundation; either version 2 of
15 the License, or (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 General Public License for more details.
22 You should have received a copy of the GNU General Public
23 License along with this program; if not, write to the Free
24 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
32 /* Forward referenced subroutines */
33 static void *job_thread(void *arg);
34 static char *edit_run_codes(JCR *jcr, char *omsg, char *imsg);
35 static void release_resource_locks(JCR *jcr);
36 static int acquire_resource_locks(JCR *jcr);
38 static void backoff_resource_locks(JCR *jcr, int count);
41 /* Exported subroutines */
42 void run_job(JCR *jcr);
45 /* Imported subroutines */
46 extern void term_scheduler();
47 extern void term_ua_server();
48 extern int do_backup(JCR *jcr);
49 extern int do_admin(JCR *jcr);
50 extern int do_restore(JCR *jcr);
51 extern int do_verify(JCR *jcr);
54 static semlock_t job_lock;
55 static pthread_mutex_t mutex;
56 static pthread_cond_t resource_wait;
57 static int waiting = 0; /* count of waiting threads */
59 /* Queue of jobs to be run */
60 workq_t job_wq; /* our job work queue */
63 void init_job_server(int max_workers)
67 if ((stat = sem_init(&job_lock, max_workers)) != 0) {
68 Emsg1(M_ABORT, 0, _("Could not init job lock: ERR=%s\n"), strerror(stat));
70 if ((stat = pthread_mutex_init(&mutex, NULL)) != 0) {
71 Emsg1(M_ABORT, 0, _("Could not init resource mutex: ERR=%s\n"), strerror(stat));
73 if ((stat = pthread_cond_init(&resource_wait, NULL)) != 0) {
74 Emsg1(M_ABORT, 0, _("Could not init resource wait: ERR=%s\n"), strerror(stat));
78 if ((stat = workq_init(&job_wq, max_workers, job_thread)) != 0) {
79 Emsg1(M_ABORT, 0, _("Could not init job work queue: ERR=%s\n"), strerror(stat));
86 * Run a job -- typically called by the scheduler, but may also
87 * be called by the UA (Console program).
90 void run_job(JCR *jcr)
96 workq_ele_t *work_item;
99 sm_check(__FILE__, __LINE__, True);
100 init_msg(jcr, jcr->messages);
101 create_unique_job_name(jcr, jcr->job->hdr.name);
102 set_jcr_job_status(jcr, JS_Created);
103 jcr->jr.SchedTime = jcr->sched_time;
104 jcr->jr.StartTime = jcr->start_time;
105 jcr->jr.Type = jcr->JobType;
106 jcr->jr.Level = jcr->JobLevel;
107 jcr->jr.JobStatus = jcr->JobStatus;
108 bstrncpy(jcr->jr.Name, jcr->job->hdr.name, sizeof(jcr->jr.Name));
109 bstrncpy(jcr->jr.Job, jcr->Job, sizeof(jcr->jr.Job));
111 /* Initialize termination condition variable */
112 if ((errstat = pthread_cond_init(&jcr->term_wait, NULL)) != 0) {
113 Jmsg1(jcr, M_FATAL, 0, _("Unable to init job cond variable: ERR=%s\n"), strerror(errstat));
114 set_jcr_job_status(jcr, JS_ErrorTerminated);
122 Dmsg0(50, "Open database\n");
123 jcr->db=db_init_database(jcr, jcr->catalog->db_name, jcr->catalog->db_user,
124 jcr->catalog->db_password, jcr->catalog->db_address,
125 jcr->catalog->db_port, jcr->catalog->db_socket);
126 if (!db_open_database(jcr, jcr->db)) {
127 Jmsg(jcr, M_FATAL, 0, "%s", db_strerror(jcr->db));
128 set_jcr_job_status(jcr, JS_ErrorTerminated);
132 Dmsg0(50, "DB opened\n");
137 jcr->jr.JobStatus = jcr->JobStatus;
138 if (!db_create_job_record(jcr, jcr->db, &jcr->jr)) {
139 Jmsg(jcr, M_FATAL, 0, "%s", db_strerror(jcr->db));
140 set_jcr_job_status(jcr, JS_ErrorTerminated);
144 jcr->JobId = jcr->jr.JobId;
145 ASSERT(jcr->jr.JobId > 0);
147 Dmsg4(30, "Created job record JobId=%d Name=%s Type=%c Level=%c\n",
148 jcr->JobId, jcr->Job, jcr->jr.Type, jcr->jr.Level);
149 Dmsg0(200, "Add jrc to work queue\n");
152 if ((stat = pthread_create(&tid, NULL, job_thread, (void *)jcr)) != 0) {
153 Emsg1(M_ABORT, 0, _("Unable to create job thread: ERR=%s\n"), strerror(stat));
156 /* Queue the job to be run */
157 if ((stat = workq_add(&job_wq, (void *)jcr, &work_item, 0)) != 0) {
158 Emsg1(M_ABORT, 0, _("Could not add job to work queue: ERR=%s\n"), strerror(stat));
160 jcr->work_item = work_item;
162 Dmsg0(200, "Done run_job()\n");
166 * This is the engine called by workq_add() when we were pulled
167 * from the work queue.
168 * At this point, we are running in our own thread
170 static void *job_thread(void *arg)
172 JCR *jcr = (JCR *)arg;
174 pthread_detach(pthread_self());
175 sm_check(__FILE__, __LINE__, True);
177 if (!acquire_resource_locks(jcr)) {
178 set_jcr_job_status(jcr, JS_Canceled);
181 Dmsg0(200, "=====Start Job=========\n");
182 jcr->start_time = time(NULL); /* set the real start time */
183 set_jcr_job_status(jcr, JS_Running);
185 if (job_canceled(jcr)) {
186 update_job_end_record(jcr);
187 } else if (jcr->job->MaxStartDelay != 0 && jcr->job->MaxStartDelay <
188 (utime_t)(jcr->start_time - jcr->sched_time)) {
189 Jmsg(jcr, M_FATAL, 0, _("Job canceled because max start delay time exceeded.\n"));
190 set_jcr_job_status(jcr, JS_Canceled);
191 update_job_end_record(jcr);
195 if (jcr->job->RunBeforeJob) {
196 POOLMEM *before = get_pool_memory(PM_FNAME);
199 char line[MAXSTRING];
201 before = edit_run_codes(jcr, before, jcr->job->RunBeforeJob);
202 bpipe = open_bpipe(before, 0, "r");
203 while (fgets(line, sizeof(line), bpipe->rfd)) {
204 Jmsg(jcr, M_INFO, 0, _("RunBefore: %s"), line);
206 status = close_bpipe(bpipe);
208 Jmsg(jcr, M_FATAL, 0, _("RunBeforeJob returned non-zero status=%d\n"),
210 set_jcr_job_status(jcr, JS_FatalError);
211 update_job_end_record(jcr);
212 free_pool_memory(before);
215 free_pool_memory(before);
217 switch (jcr->JobType) {
220 if (jcr->JobStatus == JS_Terminated) {
226 if (jcr->JobStatus == JS_Terminated) {
232 if (jcr->JobStatus == JS_Terminated) {
238 if (jcr->JobStatus == JS_Terminated) {
243 Pmsg1(0, "Unimplemented job type: %d\n", jcr->JobType);
246 if (jcr->job->RunAfterJob) {
247 POOLMEM *after = get_pool_memory(PM_FNAME);
250 char line[MAXSTRING];
252 after = edit_run_codes(jcr, after, jcr->job->RunAfterJob);
253 bpipe = open_bpipe(after, 0, "r");
254 while (fgets(line, sizeof(line), bpipe->rfd)) {
255 Jmsg(jcr, M_INFO, 0, _("RunAfter: %s"), line);
257 status = close_bpipe(bpipe);
259 Jmsg(jcr, M_FATAL, 0, _("RunAfterJob returned non-zero status=%d\n"),
261 set_jcr_job_status(jcr, JS_FatalError);
262 update_job_end_record(jcr);
264 free_pool_memory(after);
268 release_resource_locks(jcr);
269 Dmsg0(50, "Before free jcr\n");
271 Dmsg0(50, "======== End Job ==========\n");
272 sm_check(__FILE__, __LINE__, True);
277 * Acquire the resources needed. These locks limit the
278 * number of jobs by each resource. We have limits on
279 * Jobs, Clients, Storage, and total jobs.
281 static int acquire_resource_locks(JCR *jcr)
283 time_t now = time(NULL);
284 time_t wtime = jcr->sched_time - now;
286 /* Wait until scheduled time arrives */
287 if (wtime > 0 && verbose) {
288 Jmsg(jcr, M_INFO, 0, _("Waiting %d seconds for start time.\n"), wtime);
289 set_jcr_job_status(jcr, JS_WaitStartTime);
292 Dmsg2(100, "Waiting on sched time, jobid=%d secs=%d\n", jcr->JobId, wtime);
296 bmicrosleep(wtime, 0);
297 if (job_canceled(jcr)) {
300 wtime = jcr->sched_time - time(NULL);
308 /* Initialize semaphores */
309 if (jcr->store->sem.valid != SEMLOCK_VALID) {
310 if ((stat = sem_init(&jcr->store->sem, jcr->store->MaxConcurrentJobs)) != 0) {
311 Emsg1(M_ABORT, 0, _("Could not init Storage semaphore: ERR=%s\n"), strerror(stat));
314 if (jcr->client->sem.valid != SEMLOCK_VALID) {
315 if ((stat = sem_init(&jcr->client->sem, jcr->client->MaxConcurrentJobs)) != 0) {
316 Emsg1(M_ABORT, 0, _("Could not init Client semaphore: ERR=%s\n"), strerror(stat));
319 if (jcr->job->sem.valid != SEMLOCK_VALID) {
320 if ((stat = sem_init(&jcr->job->sem, jcr->job->MaxConcurrentJobs)) != 0) {
321 Emsg1(M_ABORT, 0, _("Could not init Job semaphore: ERR=%s\n"), strerror(stat));
326 /* Acquire semaphore */
327 set_jcr_job_status(jcr, JS_WaitJobRes);
328 if ((stat = sem_lock(&jcr->job->sem)) != 0) {
329 Emsg1(M_ABORT, 0, _("Could not acquire Job max jobs lock: ERR=%s\n"), strerror(stat));
331 set_jcr_job_status(jcr, JS_WaitClientRes);
332 if ((stat = sem_trylock(&jcr->client->sem)) != 0) {
334 backoff_resource_locks(jcr, 1);
337 Emsg1(M_ABORT, 0, _("Could not acquire Client max jobs lock: ERR=%s\n"), strerror(stat));
340 set_jcr_job_status(jcr, JS_WaitStoreRes);
341 if ((stat = sem_trylock(&jcr->store->sem)) != 0) {
343 backoff_resource_locks(jcr, 2);
346 Emsg1(M_ABORT, 0, _("Could not acquire Storage max jobs lock: ERR=%s\n"), strerror(stat));
349 set_jcr_job_status(jcr, JS_WaitMaxJobs);
350 if ((stat = sem_trylock(&job_lock)) != 0) {
352 backoff_resource_locks(jcr, 3);
355 Emsg1(M_ABORT, 0, _("Could not acquire max jobs lock: ERR=%s\n"), strerror(stat));
361 if (job_canceled(jcr)) {
366 * Wait for a resource to be released either by backoff or
367 * by a job terminating.
370 pthread_cond_wait(&resource_wait, &mutex);
375 jcr->acquired_resource_locks = 1;
382 * We could not get all the resource locks because
383 * too many jobs are running, so release any locks
384 * we did acquire, giving others a chance to use them
387 static void backoff_resource_locks(JCR *jcr, int count)
392 sem_unlock(&jcr->store->sem);
393 /* Fall through wanted */
395 sem_unlock(&jcr->client->sem);
396 /* Fall through wanted */
398 sem_unlock(&jcr->job->sem);
402 * Since we released a lock, if there are any threads
403 * waiting, wake them up so that they can try again.
406 pthread_cond_broadcast(&resource_wait);
413 * This is called at the end of the job to release
414 * any resource limits on the number of jobs. If
415 * there are any other jobs waiting, we wake them
416 * up so that they can try again.
418 static void release_resource_locks(JCR *jcr)
420 if (!jcr->acquired_resource_locks) {
421 return; /* Job canceled, no locks acquired */
425 sem_unlock(&jcr->store->sem);
426 sem_unlock(&jcr->client->sem);
427 sem_unlock(&jcr->job->sem);
428 sem_unlock(&job_lock);
430 pthread_cond_broadcast(&resource_wait);
437 * Get or create a Client record for this Job
439 int get_or_create_client_record(JCR *jcr)
443 memset(&cr, 0, sizeof(cr));
444 bstrncpy(cr.Name, jcr->client->hdr.name, sizeof(cr.Name));
445 cr.AutoPrune = jcr->client->AutoPrune;
446 cr.FileRetention = jcr->client->FileRetention;
447 cr.JobRetention = jcr->client->JobRetention;
448 if (jcr->client_name) {
449 free_pool_memory(jcr->client_name);
451 jcr->client_name = get_memory(strlen(jcr->client->hdr.name) + 1);
452 strcpy(jcr->client_name, jcr->client->hdr.name);
453 if (!db_create_client_record(jcr, jcr->db, &cr)) {
454 Jmsg(jcr, M_FATAL, 0, _("Could not create Client record. ERR=%s\n"),
455 db_strerror(jcr->db));
458 jcr->jr.ClientId = cr.ClientId;
460 if (jcr->client_uname) {
461 free_pool_memory(jcr->client_uname);
463 jcr->client_uname = get_memory(strlen(cr.Uname) + 1);
464 strcpy(jcr->client_uname, cr.Uname);
466 Dmsg2(100, "Created Client %s record %d\n", jcr->client->hdr.name,
473 * Write status and such in DB
475 void update_job_end_record(JCR *jcr)
477 if (jcr->jr.EndTime == 0) {
478 jcr->jr.EndTime = time(NULL);
480 jcr->end_time = jcr->jr.EndTime;
481 jcr->jr.JobId = jcr->JobId;
482 jcr->jr.JobStatus = jcr->JobStatus;
483 jcr->jr.JobFiles = jcr->JobFiles;
484 jcr->jr.JobBytes = jcr->JobBytes;
485 jcr->jr.VolSessionId = jcr->VolSessionId;
486 jcr->jr.VolSessionTime = jcr->VolSessionTime;
487 if (!db_update_job_end_record(jcr, jcr->db, &jcr->jr)) {
488 Jmsg(jcr, M_WARNING, 0, _("Error updating job record. %s"),
489 db_strerror(jcr->db));
494 * Takes base_name and appends (unique) current
495 * date and time to form unique job name.
497 * Returns: unique job name in jcr->Job
498 * date/time in jcr->start_time
500 void create_unique_job_name(JCR *jcr, char *base_name)
502 /* Job start mutex */
503 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
504 static time_t last_start_time = 0;
507 char dt[MAX_TIME_LENGTH];
508 char name[MAX_NAME_LENGTH];
511 /* Guarantee unique start time -- maximum one per second, and
512 * thus unique Job Name
514 P(mutex); /* lock creation of jobs */
516 while (now == last_start_time) {
517 bmicrosleep(0, 500000);
520 last_start_time = now;
521 V(mutex); /* allow creation of jobs */
522 jcr->start_time = now;
523 /* Form Unique JobName */
524 localtime_r(&now, &tm);
525 /* Use only characters that are permitted in Windows filenames */
526 strftime(dt, sizeof(dt), "%Y-%m-%d_%H.%M.%S", &tm);
527 bstrncpy(name, base_name, sizeof(name));
528 name[sizeof(name)-22] = 0; /* truncate if too long */
529 sprintf(jcr->Job, "%s.%s", name, dt); /* add date & time */
530 /* Convert spaces into underscores */
531 for (p=jcr->Job; *p; p++) {
539 * Free the Job Control Record if no one is still using it.
540 * Called from main free_jcr() routine in src/lib/jcr.c so
541 * that we can do our Director specific cleanup of the jcr.
543 void dird_free_jcr(JCR *jcr)
545 Dmsg0(200, "Start dird free_jcr\n");
547 if (jcr->file_bsock) {
548 Dmsg0(200, "Close File bsock\n");
549 bnet_close(jcr->file_bsock);
551 if (jcr->store_bsock) {
552 Dmsg0(200, "Close Store bsock\n");
553 bnet_close(jcr->store_bsock);
556 Dmsg0(200, "Free JCR fname\n");
557 free_pool_memory(jcr->fname);
560 Dmsg0(200, "Free JCR stime\n");
561 free_pool_memory(jcr->stime);
564 Dmsg0(200, "Close DB\n");
565 db_close_database(jcr, jcr->db);
567 if (jcr->RestoreWhere) {
568 free(jcr->RestoreWhere);
570 if (jcr->RestoreBootstrap) {
571 free(jcr->RestoreBootstrap);
573 if (jcr->client_uname) {
574 free_pool_memory(jcr->client_uname);
576 Dmsg0(200, "End dird free_jcr\n");
580 * Set some defaults in the JCR necessary to
581 * run. These items are pulled from the job
582 * definition as defaults, but can be overridden
583 * later either by the Run record in the Schedule resource,
584 * or by the Console program.
586 void set_jcr_defaults(JCR *jcr, JOB *job)
589 jcr->JobType = job->JobType;
590 jcr->JobLevel = job->level;
591 jcr->store = job->storage;
592 jcr->client = job->client;
593 if (jcr->client_name) {
594 free_pool_memory(jcr->client_name);
596 jcr->client_name = get_memory(strlen(jcr->client->hdr.name) + 1);
597 strcpy(jcr->client_name, jcr->client->hdr.name);
598 jcr->pool = job->pool;
599 jcr->catalog = job->client->catalog;
600 jcr->fileset = job->fileset;
601 jcr->messages = job->messages;
602 if (jcr->RestoreBootstrap) {
603 free(jcr->RestoreBootstrap);
605 /* This can be overridden by Console program */
606 if (job->RestoreBootstrap) {
607 jcr->RestoreBootstrap = bstrdup(job->RestoreBootstrap);
609 /* If no default level given, set one */
610 if (jcr->JobLevel == 0) {
611 switch (jcr->JobType) {
613 jcr->JobLevel = L_VERIFY_CATALOG;
616 jcr->JobLevel = L_INCREMENTAL;
620 jcr->JobLevel = L_FULL;
629 * Edit codes into Run command
632 * %d = Director's name
640 * omsg = edited output message
641 * imsg = input string containing edit codes (%x)
644 static char *edit_run_codes(JCR *jcr, char *omsg, char *imsg)
651 Dmsg1(200, "edit_run_codes: %s\n", imsg);
652 for (p=imsg; *p; p++) {
659 str = jcr->client_name;
668 str = job_status_to_str(jcr->JobStatus);
671 sprintf(add, "%d", jcr->JobId);
678 str = job_level_to_str(jcr->JobLevel);
681 str = jcr->job->hdr.name;
684 str = job_type_to_str(jcr->JobType);
698 Dmsg1(200, "add_str %s\n", str);
699 pm_strcat(&omsg, (char *)str);
700 Dmsg1(200, "omsg=%s\n", omsg);