3 * Bacula Director -- msgchan.c -- handles the message channel
4 * to the Storage daemon and the File daemon.
6 * Kern Sibbald, August MM
8 * This routine runs as a thread and must be thread reentrant.
10 * Basic tasks done here:
11 * Open a message channel with the Storage daemon
12 * to authenticate ourself and to pass the JobId.
13 * Create a thread to interact with the Storage daemon
14 * who returns a job status and requests Catalog services, etc.
19 Bacula® - The Network Backup Solution
21 Copyright (C) 2000-2006 Free Software Foundation Europe e.V.
23 The main author of Bacula is Kern Sibbald, with contributions from
24 many others, a complete list can be found in the file AUTHORS.
25 This program is Free Software; you can redistribute it and/or
26 modify it under the terms of version two of the GNU General Public
27 License as published by the Free Software Foundation plus additions
28 that are listed in the file LICENSE.
30 This program is distributed in the hope that it will be useful, but
31 WITHOUT ANY WARRANTY; without even the implied warranty of
32 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
33 General Public License for more details.
35 You should have received a copy of the GNU General Public License
36 along with this program; if not, write to the Free Software
37 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
40 Bacula® is a registered trademark of John Walker.
41 The licensor of Bacula is the Free Software Foundation Europe
42 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
43 Switzerland, email:ftf@fsfeurope.org.
49 static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
51 /* Commands sent to Storage daemon */
52 static char jobcmd[] = "JobId=%s job=%s job_name=%s client_name=%s "
53 "type=%d level=%d FileSet=%s NoAttr=%d SpoolAttr=%d FileSetMD5=%s "
54 "SpoolData=%d WritePartAfterJob=%d PreferMountedVols=%d\n";
55 static char use_storage[] = "use storage=%s media_type=%s pool_name=%s "
56 "pool_type=%s append=%d copy=%d stripe=%d\n";
57 static char use_device[] = "use device=%s\n";
58 //static char query_device[] = _("query device=%s");
60 /* Response from Storage daemon */
61 static char OKjob[] = "3000 OK Job SDid=%d SDtime=%d Authorization=%100s\n";
62 static char OK_device[] = "3000 OK use device device=%s\n";
64 /* Storage Daemon requests */
65 static char Job_start[] = "3010 Job %127s start\n";
66 static char Job_end[] =
67 "3099 Job %127s end JobStatus=%d JobFiles=%d JobBytes=%" lld "\n";
69 /* Forward referenced functions */
70 extern "C" void *msg_thread(void *arg);
73 * Establish a message channel connection with the Storage daemon
74 * and perform authentication.
76 bool connect_to_storage_daemon(JCR *jcr, int retry_interval,
77 int max_retry_time, int verbose)
82 if (jcr->store_bsock) {
83 return true; /* already connected */
86 /* If there is a write storage use it */
94 * Open message channel with the Storage daemon
96 Dmsg2(100, "bnet_connect to Storage daemon %s:%d\n", store->address,
98 sd = bnet_connect(jcr, retry_interval, max_retry_time,
99 _("Storage daemon"), store->address,
100 NULL, store->SDport, verbose);
104 sd->res = (RES *)store; /* save pointer to other end */
105 jcr->store_bsock = sd;
107 if (!authenticate_storage_daemon(jcr, store)) {
109 jcr->store_bsock = NULL;
116 * Here we ask the SD to send us the info for a
117 * particular device resource.
120 bool update_device_res(JCR *jcr, DEVICE *dev)
122 POOL_MEM device_name;
124 if (!connect_to_storage_daemon(jcr, 5, 30, 0)) {
127 sd = jcr->store_bsock;
128 pm_strcpy(device_name, dev->hdr.name);
129 bash_spaces(device_name);
130 bnet_fsend(sd, query_device, device_name.c_str());
131 Dmsg1(100, ">stored: %s\n", sd->msg);
132 /* The data is returned through Device_update */
133 if (bget_dirmsg(sd) <= 0) {
141 * Start a job with the Storage daemon
143 bool start_storage_daemon_job(JCR *jcr, alist *rstore, alist *wstore)
149 POOL_MEM store_name, device_name, pool_name, pool_type, media_type;
150 POOL_MEM job_name, client_name, fileset_name;
155 sd = jcr->store_bsock;
157 * Now send JobId and permissions, and get back the authorization key.
159 pm_strcpy(job_name, jcr->job->hdr.name);
160 bash_spaces(job_name);
161 pm_strcpy(client_name, jcr->client->hdr.name);
162 bash_spaces(client_name);
163 pm_strcpy(fileset_name, jcr->fileset->hdr.name);
164 bash_spaces(fileset_name);
165 if (jcr->fileset->MD5[0] == 0) {
166 bstrncpy(jcr->fileset->MD5, "**Dummy**", sizeof(jcr->fileset->MD5));
168 /* If rescheduling, cancel the previous incarnation of this job
169 * with the SD, which might be waiting on the FD connection.
170 * If we do not cancel it the SD will not accept a new connection
171 * for the same jobid.
173 if (jcr->reschedule_count) {
174 bnet_fsend(sd, "cancel Job=%s\n", jcr->Job);
175 while (bnet_recv(sd) >= 0)
178 bnet_fsend(sd, jobcmd, edit_int64(jcr->JobId, ed1), jcr->Job,
179 job_name.c_str(), client_name.c_str(),
180 jcr->JobType, jcr->JobLevel,
181 fileset_name.c_str(), !jcr->pool->catalog_files,
182 jcr->job->SpoolAttributes, jcr->fileset->MD5, jcr->spool_data,
183 jcr->write_part_after_job, jcr->job->PreferMountedVolumes);
184 Dmsg1(100, ">stored: %s\n", sd->msg);
185 if (bget_dirmsg(sd) > 0) {
186 Dmsg1(100, "<stored: %s", sd->msg);
187 if (sscanf(sd->msg, OKjob, &jcr->VolSessionId,
188 &jcr->VolSessionTime, &auth_key) != 3) {
189 Dmsg1(100, "BadJob=%s\n", sd->msg);
190 Jmsg(jcr, M_FATAL, 0, _("Storage daemon rejected Job command: %s\n"), sd->msg);
193 jcr->sd_auth_key = bstrdup(auth_key);
194 Dmsg1(150, "sd_auth_key=%s\n", jcr->sd_auth_key);
197 Jmsg(jcr, M_FATAL, 0, _("<stored: bad response to Job command: %s\n"),
202 pm_strcpy(pool_type, jcr->pool->pool_type);
203 pm_strcpy(pool_name, jcr->pool->hdr.name);
204 bash_spaces(pool_type);
205 bash_spaces(pool_name);
208 * We have two loops here. The first comes from the
209 * Storage = associated with the Job, and we need
210 * to attach to each one.
211 * The inner loop loops over all the alternative devices
212 * associated with each Storage. It selects the first
216 /* Do read side of storage daemon */
218 foreach_alist(storage, rstore) {
219 Dmsg1(100, "Rstore=%s\n", storage->name());
220 pm_strcpy(store_name, storage->name());
221 bash_spaces(store_name);
222 pm_strcpy(media_type, storage->media_type);
223 bash_spaces(media_type);
224 bnet_fsend(sd, use_storage, store_name.c_str(), media_type.c_str(),
225 pool_name.c_str(), pool_type.c_str(), 0, copy, stripe);
228 /* Loop over alternative storage Devices until one is OK */
229 foreach_alist(dev, storage->device) {
230 pm_strcpy(device_name, dev->hdr.name);
231 bash_spaces(device_name);
232 bnet_fsend(sd, use_device, device_name.c_str());
233 Dmsg1(100, ">stored: %s", sd->msg);
235 bnet_sig(sd, BNET_EOD); /* end of Devices */
237 bnet_sig(sd, BNET_EOD); /* end of Storages */
238 if (bget_dirmsg(sd) > 0) {
239 Dmsg1(100, "<stored: %s", sd->msg);
240 /* ****FIXME**** save actual device name */
241 ok = sscanf(sd->msg, OK_device, device_name.c_str()) == 1;
247 /* Do write side of storage daemon */
249 foreach_alist(storage, wstore) {
250 Dmsg1(100, "Wstore=%s\n", storage->name());
251 pm_strcpy(store_name, storage->name());
252 bash_spaces(store_name);
253 pm_strcpy(media_type, storage->media_type);
254 bash_spaces(media_type);
255 bnet_fsend(sd, use_storage, store_name.c_str(), media_type.c_str(),
256 pool_name.c_str(), pool_type.c_str(), 1, copy, stripe);
259 /* Loop over alternative storage Devices until one is OK */
260 foreach_alist(dev, storage->device) {
261 pm_strcpy(device_name, dev->hdr.name);
262 bash_spaces(device_name);
263 bnet_fsend(sd, use_device, device_name.c_str());
264 Dmsg1(100, ">stored: %s", sd->msg);
266 bnet_sig(sd, BNET_EOD); /* end of Devices */
268 bnet_sig(sd, BNET_EOD); /* end of Storages */
269 if (bget_dirmsg(sd) > 0) {
270 Dmsg1(100, "<stored: %s", sd->msg);
271 /* ****FIXME**** save actual device name */
272 ok = sscanf(sd->msg, OK_device, device_name.c_str()) == 1;
280 pm_strcpy(err_msg, sd->msg); /* save message */
281 Jmsg(jcr, M_FATAL, 0, _("\n"
282 " Storage daemon didn't accept Device \"%s\" because:\n %s"),
283 device_name.c_str(), err_msg.c_str()/* sd->msg */);
285 Jmsg(jcr, M_FATAL, 0, _("\n"
286 " Storage daemon didn't accept Device \"%s\" command.\n"),
287 device_name.c_str());
294 * Start a thread to handle Storage daemon messages and
297 int start_storage_daemon_message_thread(JCR *jcr)
302 jcr->inc_use_count(); /* mark in use by msg thread */
303 jcr->sd_msg_thread_done = false;
304 jcr->SD_msg_chan = 0;
305 Dmsg0(100, "Start SD msg_thread.\n");
306 if ((status=pthread_create(&thid, NULL, msg_thread, (void *)jcr)) != 0) {
308 Jmsg1(jcr, M_ABORT, 0, _("Cannot create message thread: %s\n"), be.strerror(status));
310 /* Wait for thread to start */
311 while (jcr->SD_msg_chan == 0) {
314 Dmsg1(100, "SD msg_thread started. use=%d\n", jcr->use_count());
318 extern "C" void msg_thread_cleanup(void *arg)
320 JCR *jcr = (JCR *)arg;
321 db_end_transaction(jcr, jcr->db); /* terminate any open transaction */
322 jcr->sd_msg_thread_done = true;
323 jcr->SD_msg_chan = 0;
324 pthread_cond_broadcast(&jcr->term_wait); /* wakeup any waiting threads */
325 Dmsg1(100, "=== End msg_thread. use=%d\n", jcr->use_count());
326 free_jcr(jcr); /* release jcr */
330 * Handle the message channel (i.e. requests from the
332 * Note, we are running in a separate thread.
334 extern "C" void *msg_thread(void *arg)
336 JCR *jcr = (JCR *)arg;
339 char Job[MAX_NAME_LENGTH];
344 pthread_detach(pthread_self());
345 jcr->SD_msg_chan = pthread_self();
346 pthread_cleanup_push(msg_thread_cleanup, arg);
347 sd = jcr->store_bsock;
349 /* Read the Storage daemon's output.
351 Dmsg0(100, "Start msg_thread loop\n");
352 while (!job_canceled(jcr) && bget_dirmsg(sd) >= 0) {
353 Dmsg1(400, "<stored: %s", sd->msg);
354 if (sscanf(sd->msg, Job_start, Job) == 1) {
357 if ((stat=sscanf(sd->msg, Job_end, Job, &JobStatus, &JobFiles,
359 jcr->SDJobStatus = JobStatus; /* termination status */
360 jcr->SDJobFiles = JobFiles;
361 jcr->SDJobBytes = JobBytes;
364 Dmsg2(400, "end loop stat=%d use=%d\n", stat, jcr->use_count());
366 if (is_bnet_error(sd)) {
367 jcr->SDJobStatus = JS_ErrorTerminated;
369 pthread_cleanup_pop(1); /* remove and execute the handler */
373 void wait_for_storage_daemon_termination(JCR *jcr)
375 int cancel_count = 0;
376 /* Now wait for Storage daemon to terminate our message thread */
377 while (!jcr->sd_msg_thread_done) {
380 struct timespec timeout;
382 gettimeofday(&tv, &tz);
384 timeout.tv_sec = tv.tv_sec + 5; /* wait 5 seconds */
385 Dmsg0(400, "I'm waiting for message thread termination.\n");
387 pthread_cond_timedwait(&jcr->term_wait, &mutex, &timeout);
389 if (job_canceled(jcr)) {
390 if (jcr->SD_msg_chan) {
391 jcr->store_bsock->timed_out = 1;
392 jcr->store_bsock->terminated = 1;
393 Dmsg2(400, "kill jobid=%d use=%d\n", (int)jcr->JobId, jcr->use_count());
394 pthread_kill(jcr->SD_msg_chan, TIMEOUT_SIGNAL);
398 /* Give SD 30 seconds to clean up after cancel */
399 if (cancel_count == 6) {
403 set_jcr_job_status(jcr, JS_Terminated);
409 extern "C" void *device_thread(void *arg)
416 pthread_detach(pthread_self());
417 jcr = new_control_jcr("*DeviceInit*", JT_SYSTEM);
418 for (i=0; i < MAX_TRIES; i++) {
419 if (!connect_to_storage_daemon(jcr, 10, 30, 1)) {
420 Dmsg0(900, "Failed connecting to SD.\n");
424 foreach_res(dev, R_DEVICE) {
425 if (!update_device_res(jcr, dev)) {
426 Dmsg1(900, "Error updating device=%s\n", dev->hdr.name);
428 Dmsg1(900, "Updated Device=%s\n", dev->hdr.name);
432 bnet_close(jcr->store_bsock);
433 jcr->store_bsock = NULL;
442 * Start a thread to handle getting Device resource information
443 * from SD. This is called once at startup of the Director.
445 void init_device_resources()
450 Dmsg0(100, "Start Device thread.\n");
451 if ((status=pthread_create(&thid, NULL, device_thread, NULL)) != 0) {
453 Jmsg1(NULL, M_ABORT, 0, _("Cannot create message thread: %s\n"), be.strerror(status));