2 Bacula® - The Network Backup Solution
4 Copyright (C) 2002-2012 Free Software Foundation Europe e.V.
6 The main author of Bacula is Kern Sibbald, with contributions from
7 many others, a complete list can be found in the file AUTHORS.
8 This program is Free Software; you can redistribute it and/or
9 modify it under the terms of version three of the GNU Affero General Public
10 License as published by the Free Software Foundation and included
13 This program is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU Affero General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 Bacula® is a registered trademark of Kern Sibbald.
24 The licensor of Bacula is the Free Software Foundation Europe
25 (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
26 Switzerland, email:ftf@fsfeurope.org.
30 * Routines for handling mounting tapes for reading and for
33 * Kern Sibbald, August MMII
37 #include "bacula.h" /* pull in global headers */
38 #include "stored.h" /* pull in Storage Deamon headers */
40 static pthread_mutex_t mount_mutex = PTHREAD_MUTEX_INITIALIZER;
57 * If release is set, we rewind the current volume,
58 * which we no longer want, and ask the user (console)
59 * to mount the next volume.
61 * Continue trying until we get it, and then ensure
62 * that we can write on it.
64 * This routine returns a 0 only if it is REALLY
65 * impossible to get the requested Volume.
67 * This routine is entered with the device blocked, but not
71 bool DCR::mount_next_write_volume()
74 bool ask = false, recycle, autochanger;
78 Dmsg2(150, "Enter mount_next_volume(release=%d) dev=%s\n", dev->must_unload(),
81 init_device_wait_timers(dcr);
86 * Attempt to mount the next volume. If something non-fatal goes
87 * wrong, we come back here to re-try (new op messages, re-read
91 Dmsg1(150, "mount_next_vol retry=%d\n", retry);
92 /* Ignore retry if this is poll request */
94 /* Last ditch effort before giving up, force operator to respond */
97 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
98 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
100 goto no_lock_bail_out;
103 Dmsg1(150, "Continue after dir_ask_sysop_to_mount. must_load=%d\n", dev->must_load());
105 if (job_canceled(jcr)) {
106 Jmsg(jcr, M_FATAL, 0, _("Job %d canceled.\n"), jcr->JobId);
111 if (dev->must_unload()) {
112 ask = true; /* ask operator to mount tape */
115 do_swapping(true /*is_writing*/);
116 do_load(true /*is_writing*/);
118 if (!find_a_volume()) {
122 if (job_canceled(jcr)) {
125 Dmsg3(150, "After find_next_append. Vol=%s Slot=%d Parts=%d\n",
126 getVolCatName(), VolCatInfo.Slot, VolCatInfo.VolCatParts);
129 * Get next volume and ready it for append
130 * This code ensures that the device is ready for
131 * writing. We start from the assumption that there
132 * may not be a tape mounted.
134 * If the device is a file, we create the output
135 * file. If it is a tape, we check the volume name
136 * and move the tape to the end of data.
139 dcr->setVolCatInfo(false); /* out of date when Vols unlocked */
140 if (autoload_device(dcr, true/*writing*/, NULL) > 0) {
148 Dmsg1(150, "autoload_dev returns %d\n", autochanger);
150 * If we autochanged to correct Volume or (we have not just
151 * released the Volume AND we can automount) we go ahead
152 * and read the label. If there is no tape in the drive,
153 * we will fail, recurse and ask the operator the next time.
155 if (!dev->must_unload() && dev->is_tape() && dev->has_cap(CAP_AUTOMOUNT)) {
156 Dmsg0(250, "(1)Ask=0\n");
157 ask = false; /* don't ask SYSOP this time */
159 /* Don't ask if not removable */
160 if (!dev->is_removable()) {
161 Dmsg0(250, "(2)Ask=0\n");
164 Dmsg2(250, "Ask=%d autochanger=%d\n", ask, autochanger);
168 dcr->setVolCatInfo(false); /* out of date when Vols unlocked */
169 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
170 Dmsg0(150, "Error return ask_sysop ...\n");
171 goto no_lock_bail_out;
175 if (job_canceled(jcr)) {
178 Dmsg3(150, "want vol=%s devvol=%s dev=%s\n", VolumeName,
179 dev->VolHdr.VolumeName, dev->print_name());
181 if (dev->poll && dev->has_cap(CAP_CLOSEONPOLL)) {
186 /* Ensure the device is open */
187 if (dev->has_cap(CAP_STREAM)) {
188 mode = OPEN_WRITE_ONLY;
190 mode = OPEN_READ_WRITE;
192 /* Try autolabel if enabled */
193 if (!dev->open(dcr, mode)) {
194 try_autolabel(false); /* try to create a new volume label */
196 while (!dev->open(dcr, mode)) {
197 Dmsg1(150, "open_device failed: ERR=%s\n", dev->bstrerror());
198 if ((dev->is_file() && dev->is_removable()) || dev->is_dvd()) {
200 Dmsg0(150, "call scan_dir_for_vol\n");
202 if (!dev->mount(0)) {
206 if (ok && dev->scan_dir_for_volume(dcr)) {
207 if (dev->open(dcr, mode)) {
208 break; /* got a valid volume */
211 if (ok && dev->is_dvd()) {
215 if (try_autolabel(false) == try_read_vol) {
216 break; /* created a new volume label */
218 Jmsg3(jcr, M_WARNING, 0, _("Open device %s Volume \"%s\" failed: ERR=%s\n"),
219 dev->print_name(), dcr->VolumeName, dev->bstrerror());
220 Dmsg0(50, "set_unload\n");
221 dev->set_unload(); /* force ask sysop */
223 Dmsg0(150, "goto mount_next_vol\n");
228 * Now check the volume label to make sure we have the right tape mounted
231 switch (check_volume_label(ask, autochanger)) {
233 Dmsg0(50, "set_unload\n");
234 dev->set_unload(); /* want a different Volume */
235 Dmsg0(150, "goto mount_next_vol\n");
245 * Check that volcatinfo is good
247 if (!dev->haveVolCatInfo()) {
248 Dmsg0(210, "Do not have volcatinfo\n");
249 if (!find_a_volume()) {
252 dev->VolCatInfo = VolCatInfo; /* structure assignment */
256 * See if we have a fresh tape or a tape with data.
258 * Note, if the LabelType is PRE_LABEL, it was labeled
259 * but never written. If so, rewrite the label but set as
260 * VOL_LABEL. We rewind and return the label (reconstructed)
261 * in the block so that in the case of a new tape, data can
262 * be appended just after the block label. If we are writing
263 * a second volume, the calling routine will write the label
264 * before writing the overflow block.
266 * If the tape is marked as Recycle, we rewrite the label.
268 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
269 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
270 if (!dcr->rewrite_volume_label(recycle)) {
271 mark_volume_in_error();
276 * OK, at this point, we have a valid Bacula label, but
277 * we need to position to the end of the volume, since we are
278 * just now putting it into append mode.
280 Dmsg1(100, "Device previously written, moving to end of data. Expect %lld bytes\n",
281 dev->VolCatInfo.VolCatBytes);
282 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
285 if (!dev->eod(dcr)) {
286 Dmsg2(050, "Unable to position to end of data on device %s: ERR=%s\n",
287 dev->print_name(), dev->bstrerror());
288 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device %s: ERR=%s\n"),
289 dev->print_name(), dev->bstrerror());
290 mark_volume_in_error();
293 if (!is_eod_valid()) {
294 Dmsg0(100, "goto mount_next_vol\n");
298 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
299 Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
300 if (!dir_update_volume_info(dcr, false, false)) {
304 /* Return an empty block */
305 empty_block(block); /* we used it for reading so set for write */
308 Dmsg1(150, "set APPEND, normal return from mount_next_write_volume. dev=%s\n",
322 * This routine is meant to be called once the first pass
323 * to ensure that we have a candidate volume to mount.
324 * Otherwise, we ask the sysop to created one.
325 * Note, mount_mutex is already locked on entry and thus
326 * must remain locked on exit from this function.
328 bool DCR::find_a_volume()
332 if (!is_suitable_volume_mounted()) {
333 bool have_vol = false;
334 /* Do we have a candidate volume? */
336 bstrncpy(VolumeName, dev->vol->vol_name, sizeof(VolumeName));
337 have_vol = dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
340 * Get Director's idea of what tape we should have mounted.
344 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
345 while (!dir_find_next_appendable_volume(dcr)) {
346 Dmsg0(200, "not dir_find_next\n");
347 if (job_canceled(jcr)) {
351 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
356 if (job_canceled(jcr)) {
359 Dmsg0(150, "Again dir_find_next_append...\n");
363 if (dcr->haveVolCatInfo()) {
366 return dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE);
369 int DCR::check_volume_label(bool &ask, bool &autochanger)
371 int vol_label_status;
373 * If we are writing to a stream device, ASSUME the volume label
376 if (dev->has_cap(CAP_STREAM)) {
377 vol_label_status = VOL_OK;
378 create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
379 dev->VolHdr.LabelType = PRE_LABEL;
381 vol_label_status = read_dev_volume_label(this);
383 if (job_canceled(jcr)) {
387 Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
388 VolCatInfo.VolCatStatus);
391 * At this point, dev->VolCatInfo has what is in the drive, if anything,
392 * and dcr->VolCatInfo has what the Director wants.
394 switch (vol_label_status) {
396 Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
397 dev->VolCatInfo = VolCatInfo; /* structure assignment */
398 break; /* got a Volume */
400 VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
401 char saveVolumeName[MAX_NAME_LENGTH];
403 Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
404 if (dev->is_volume_to_unload()) {
406 goto check_next_volume;
409 /* If not removable, Volume is broken */
410 if (!dev->is_removable()) {
411 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
412 VolumeName, dev->print_name());
413 mark_volume_in_error();
414 goto check_next_volume;
418 * OK, we got a different volume mounted. First save the
419 * requested Volume info (dcr) structure, then query if
420 * this volume is really OK. If not, put back the desired
421 * volume name, mark it not in changer and continue.
423 dcrVolCatInfo = VolCatInfo; /* structure assignment */
424 devVolCatInfo = dev->VolCatInfo; /* structure assignment */
425 /* Check if this is a valid Volume in the pool */
426 bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
427 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
428 if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
429 POOL_MEM vol_info_msg;
430 pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
431 /* Restore desired volume name, note device info out of sync */
432 /* This gets the info regardless of the Pool */
433 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
434 if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
436 * If we get here, we know we cannot write on the Volume,
437 * and we know that we cannot read it either, so it
438 * is not in the autochanger.
440 mark_volume_not_inchanger();
442 dev->VolCatInfo = devVolCatInfo; /* structure assignment */
443 dev->set_unload(); /* unload this volume */
444 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
445 " Current Volume \"%s\" not acceptable because:\n"
447 dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
448 vol_info_msg.c_str());
450 /* Restore saved DCR before continuing */
451 bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
452 VolCatInfo = dcrVolCatInfo; /* structure assignment */
453 goto check_next_volume;
456 * This was not the volume we expected, but it is OK with
457 * the Director, so use it.
459 Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
460 dev->VolCatInfo = VolCatInfo; /* structure assignment */
461 Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
462 if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
463 Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
464 dev->VolHdr.VolumeName, dev->print_name());
466 dev->setVolCatInfo(false);
467 setVolCatInfo(false);
468 goto check_next_volume;
470 break; /* got a Volume */
472 * At this point, we assume we have a blank tape mounted.
476 Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
477 mark_volume_in_error();
478 goto check_bail_out; /* we could not write on DVD */
480 /* Fall through wanted */
482 switch (try_autolabel(true)) {
484 goto check_next_volume;
486 goto check_read_volume;
492 /* NOTE! Fall-through wanted. */
495 Dmsg0(200, "VOL_NO_MEDIA or default.\n");
496 /* Send error message */
499 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
502 /* Needed, so the medium can be changed */
503 if (dev->requires_mount()) {
507 goto check_next_volume;
512 dev->setVolCatInfo(false);
513 setVolCatInfo(false);
514 return check_next_vol;
520 return check_read_vol;
525 bool DCR::is_suitable_volume_mounted()
527 /* Volume mounted? */
528 if (dev->VolHdr.VolumeName[0] == 0 || dev->swap_dev || dev->must_unload()) {
529 return false; /* no */
531 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
532 return dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
535 bool DCR::do_unload()
537 if (dev->must_unload()) {
538 Dmsg1(100, "must_unload release %s\n", dev->print_name());
544 bool DCR::do_load(bool is_writing)
546 if (dev->must_load()) {
547 Dmsg1(100, "Must load %s\n", dev->print_name());
548 if (autoload_device(this, is_writing, NULL) > 0) {
557 void DCR::do_swapping(bool is_writing)
560 * See if we are asked to swap the Volume from another device
561 * if so, unload the other device here, and attach the
562 * volume to our drive.
565 if (dev->swap_dev->must_unload()) {
567 dev->swap_dev->set_slot(dev->vol->get_slot());
569 Dmsg2(100, "Swap unloading slot=%d %s\n", dev->swap_dev->get_slot(),
570 dev->swap_dev->print_name());
571 unload_dev(this, dev->swap_dev);
574 dev->vol->clear_swapping();
575 Dmsg1(100, "=== set in_use vol=%s\n", dev->vol->vol_name);
576 dev->vol->set_in_use();
577 dev->VolHdr.VolumeName[0] = 0; /* don't yet have right Volume */
579 Dmsg1(100, "No vol on dev=%s\n", dev->print_name());
581 if (dev->swap_dev->vol) {
582 Dmsg2(100, "Vol=%s on dev=%s\n", dev->swap_dev->vol->vol_name,
583 dev->swap_dev->print_name());
585 Dmsg2(100, "Set swap_dev=NULL for dev=%s swap_dev=%s\n",
586 dev->print_name(), dev->swap_dev->print_name());
587 dev->swap_dev = NULL;
589 Dmsg0(100, "No swap_dev set\n");
595 * Check if the current position on the volume corresponds to
596 * what is in the catalog.
598 bool DCR::is_eod_valid()
601 char ed1[50], ed2[50];
602 if (dev->VolCatInfo.VolCatBytes == dev->part_start + dev->part_size) {
603 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
604 " part=%d size=%s\n"), VolumeName,
605 dev->part, edit_uint64(dev->VolCatInfo.VolCatBytes,ed1));
607 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on DVD Volume \"%s\" because: "
608 "The sizes do not match! Volume=%s Catalog=%s\n"),
610 edit_uint64(dev->part_start + dev->part_size, ed1),
611 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
612 mark_volume_in_error();
615 } else if (dev->is_tape()) {
617 * Check if we are positioned on the tape at the same place
618 * that the database says we should be.
620 if (dev->VolCatInfo.VolCatFiles == dev->get_file()) {
621 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
622 VolumeName, dev->get_file());
623 } else if (dev->get_file() > dev->VolCatInfo.VolCatFiles) {
624 Jmsg(jcr, M_WARNING, 0, _("For Volume \"%s\":\n"
625 "The number of files mismatch! Volume=%u Catalog=%u\n"
626 "Correcting Catalog\n"),
627 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
628 dev->VolCatInfo.VolCatFiles = dev->get_file();
629 dev->VolCatInfo.VolCatBlocks = dev->get_block_num();
630 if (!dir_update_volume_info(this, false, true)) {
631 Jmsg(jcr, M_WARNING, 0, _("Error updating Catalog\n"));
632 mark_volume_in_error();
636 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on tape Volume \"%s\" because:\n"
637 "The number of files mismatch! Volume=%u Catalog=%u\n"),
638 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
639 mark_volume_in_error();
642 } else if (dev->is_file()) {
643 char ed1[50], ed2[50];
645 pos = dev->lseek(this, (boffset_t)0, SEEK_END);
646 if (dev->VolCatInfo.VolCatBytes == (uint64_t)pos) {
647 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
648 " size=%s\n"), VolumeName,
649 edit_uint64(dev->VolCatInfo.VolCatBytes, ed1));
650 } else if ((uint64_t)pos > dev->VolCatInfo.VolCatBytes) {
651 Jmsg(jcr, M_WARNING, 0, _("For Volume \"%s\":\n"
652 "The sizes do not match! Volume=%s Catalog=%s\n"
653 "Correcting Catalog\n"),
654 VolumeName, edit_uint64(pos, ed1),
655 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
656 dev->VolCatInfo.VolCatBytes = (uint64_t)pos;
657 dev->VolCatInfo.VolCatFiles = (uint32_t)(pos >> 32);
658 if (!dir_update_volume_info(this, false, true)) {
659 Jmsg(jcr, M_WARNING, 0, _("Error updating Catalog\n"));
660 mark_volume_in_error();
664 Mmsg(jcr->errmsg, _("Bacula cannot write on disk Volume \"%s\" because: "
665 "The sizes do not match! Volume=%s Catalog=%s\n"),
667 edit_uint64(pos, ed1),
668 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
669 Jmsg(jcr, M_ERROR, 0, jcr->errmsg);
670 Dmsg0(050, jcr->errmsg);
671 mark_volume_in_error();
680 * If permitted, we label the device, make sure we can do
681 * it by checking that the VolCatBytes is zero => not labeled,
682 * once the Volume is labeled we don't want to label another
683 * blank tape with the same name. For disk, we go ahead and
684 * label it anyway, because the OS insures that there is only
685 * one Volume with that name.
686 * As noted above, at this point dcr->VolCatInfo has what
687 * the Director wants and dev->VolCatInfo has info on the
688 * previous tape (or nothing).
691 * try_next_vol label failed, look for another volume
692 * try_read_vol labeled volume, now re-read the label
693 * try_error hard error (catalog update)
694 * try_default I couldn't do anything
696 int DCR::try_autolabel(bool opened)
700 if (dev->poll && !dev->is_tape()) {
701 return try_default; /* if polling, don't try to create new labels */
703 /* For a tape require it to be opened and read before labeling */
704 if (!opened && dev->is_tape()) {
707 if (dev->has_cap(CAP_LABEL) && (VolCatInfo.VolCatBytes == 0 ||
708 (!dev->is_tape() && strcmp(VolCatInfo.VolCatStatus,
710 Dmsg0(150, "Create volume label\n");
711 /* Create a new Volume label and write it to the device */
712 if (!write_new_volume_label_to_dev(dcr, VolumeName,
713 pool_name, false, /* no relabel */ false /* defer DVD label */)) {
714 Dmsg2(150, "write_vol_label failed. vol=%s, pool=%s\n",
715 VolumeName, pool_name);
717 mark_volume_in_error();
721 Dmsg0(150, "dir_update_vol_info. Set Append\n");
722 /* Copy Director's info into the device info */
723 dev->VolCatInfo = VolCatInfo; /* structure assignment */
724 if (!dir_update_volume_info(dcr, true, true)) { /* indicate tape labeled */
727 Jmsg(dcr->jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
728 VolumeName, dev->print_name());
729 return try_read_vol; /* read label we just wrote */
731 if (!dev->has_cap(CAP_LABEL) && VolCatInfo.VolCatBytes == 0) {
732 Jmsg(jcr, M_WARNING, 0, _("Device %s not configured to autolabel Volumes.\n"),
735 /* If not removable, Volume is broken */
736 if (!dev->is_removable()) {
737 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
738 VolumeName, dev->print_name());
739 mark_volume_in_error();
747 * Mark volume in error in catalog
749 void DCR::mark_volume_in_error()
751 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
753 dev->VolCatInfo = VolCatInfo; /* structure assignment */
754 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
755 Dmsg0(150, "dir_update_vol_info. Set Error.\n");
756 dir_update_volume_info(this, false, false);
758 Dmsg0(50, "set_unload\n");
759 dev->set_unload(); /* must get a new volume */
763 * The Volume is not in the correct slot, so mark this
764 * Volume as not being in the Changer.
766 void DCR::mark_volume_not_inchanger()
768 Jmsg(jcr, M_ERROR, 0, _("Autochanger Volume \"%s\" not found in slot %d.\n"
769 " Setting InChanger to zero in catalog.\n"),
770 getVolCatName(), VolCatInfo.Slot);
771 dev->VolCatInfo = VolCatInfo; /* structure assignment */
772 VolCatInfo.InChanger = false;
773 dev->VolCatInfo.InChanger = false;
774 Dmsg0(400, "update vol info in mount\n");
775 dir_update_volume_info(this, true, false); /* set new status */
779 * Either because we are going to hang a new volume, or because
780 * of explicit user request, we release the current volume.
782 void DCR::release_volume()
784 unload_autochanger(this, -1);
787 Jmsg0(jcr, M_ERROR, 0, _("Hey!!!!! WroteVol non-zero !!!!!\n"));
788 Pmsg0(190, "Hey!!!!! WroteVol non-zero !!!!!\n");
791 * First erase all memory of the current volume
794 dev->block_num = dev->file = 0;
795 dev->EndBlock = dev->EndFile = 0;
796 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
798 /* Force re-read of label */
799 dev->clear_labeled();
802 dev->label_type = B_BACULA_LABEL;
805 if (dev->is_open() && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
809 /* If we have not closed the device, then at least rewind the tape */
810 if (dev->is_open()) {
811 dev->offline_or_rewind();
813 Dmsg0(190, "release_volume\n");
819 * Check to see if the tape position as defined by the OS is
820 * the same as our concept. If it is not,
821 * it means the user has probably manually rewound the tape.
822 * Note, we check only if num_writers == 0, but this code will
823 * also work fine for any number of writers. If num_writers > 0,
824 * we probably should cancel all jobs using this device, or
825 * perhaps even abort the SD, or at a minimum, mark the tape
826 * in error. Another strategy with num_writers == 0, would be
827 * to rewind the tape and do a new eod() request.
829 bool DCR::is_tape_position_ok()
831 if (dev->is_tape() && dev->num_writers == 0) {
832 int32_t file = dev->get_os_tape_file();
833 if (file >= 0 && file != (int32_t)dev->get_file()) {
834 Jmsg(jcr, M_ERROR, 0, _("Invalid tape position on volume \"%s\""
835 " on device %s. Expected %d, got %d\n"),
836 dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
838 * If the current file is greater than zero, it means we probably
839 * have some bad count of EOF marks, so mark tape in error. Otherwise
840 * the operator might have moved the tape, so we just release it
844 mark_volume_in_error();
855 * If we are reading, we come here at the end of the tape
856 * and see if there are more volumes to be mounted.
858 bool mount_next_read_volume(DCR *dcr)
860 DEVICE *dev = dcr->dev;
862 Dmsg2(90, "NumReadVolumes=%d CurReadVolume=%d\n", jcr->NumReadVolumes, jcr->CurReadVolume);
864 volume_unused(dcr); /* release current volume */
866 * End Of Tape -- mount next Volume (if another specified)
868 if (jcr->NumReadVolumes > 1 && jcr->CurReadVolume < jcr->NumReadVolumes) {
874 if (!acquire_device_for_read(dcr)) {
875 Jmsg2(jcr, M_FATAL, 0, _("Cannot open Dev=%s, Vol=%s\n"), dev->print_name(),
879 return true; /* next volume mounted */
881 Dmsg0(90, "End of Device reached.\n");