2 Bacula® - The Network Backup Solution
4 Copyright (C) 2002-2009 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 two of the GNU 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 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
38 #include "bacula.h" /* pull in global headers */
39 #include "stored.h" /* pull in Storage Deamon headers */
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;
79 Dmsg2(150, "Enter mount_next_volume(release=%d) dev=%s\n", dev->must_unload(),
82 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 */
93 if (!dev->poll && retry++ > 4) {
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);
115 if (dev->must_unload()) {
116 ask = true; /* ask operator to mount tape */
117 do_find = true; /* re-find a volume after unload */
121 do_swapping(true /*is_writing*/);
122 do_load(true /*is_writing*/);
125 if (do_find && !find_a_volume()) {
126 goto no_lock_bail_out;
129 if (job_canceled(jcr)) {
132 Dmsg3(150, "After find_next_append. Vol=%s Slot=%d Parts=%d\n",
133 VolCatInfo.VolCatName, VolCatInfo.Slot, VolCatInfo.VolCatParts);
136 * Get next volume and ready it for append
137 * This code ensures that the device is ready for
138 * writing. We start from the assumption that there
139 * may not be a tape mounted.
141 * If the device is a file, we create the output
142 * file. If it is a tape, we check the volume name
143 * and move the tape to the end of data.
147 if (autoload_device(dcr, true/*writing*/, NULL) > 0) {
154 do_find = true; /* do find_a_volume if we retry */
157 Dmsg1(150, "autoload_dev returns %d\n", autochanger);
159 * If we autochanged to correct Volume or (we have not just
160 * released the Volume AND we can automount) we go ahead
161 * and read the label. If there is no tape in the drive,
162 * we will fail, recurse and ask the operator the next time.
164 if (!dev->must_unload() && dev->is_tape() && dev->has_cap(CAP_AUTOMOUNT)) {
165 Dmsg0(250, "(1)Ask=0\n");
166 ask = false; /* don't ask SYSOP this time */
168 /* Don't ask if not removable */
169 if (!dev->is_removable()) {
170 Dmsg0(250, "(2)Ask=0\n");
173 Dmsg2(250, "Ask=%d autochanger=%d\n", ask, autochanger);
177 if (!dir_ask_sysop_to_mount_volume(dcr, ST_APPEND)) {
178 Dmsg0(150, "Error return ask_sysop ...\n");
179 goto no_lock_bail_out;
183 if (job_canceled(jcr)) {
186 Dmsg3(150, "want vol=%s devvol=%s dev=%s\n", VolumeName,
187 dev->VolHdr.VolumeName, dev->print_name());
189 if (dev->poll && dev->has_cap(CAP_CLOSEONPOLL)) {
194 /* Ensure the device is open */
195 if (dev->has_cap(CAP_STREAM)) {
196 mode = OPEN_WRITE_ONLY;
198 mode = OPEN_READ_WRITE;
200 /* Try autolabel if enabled */
201 if (dev->open(dcr, mode) < 0) {
202 try_autolabel(false); /* try to create a new volume label */
204 while (dev->open(dcr, mode) < 0) {
205 Dmsg1(150, "open_device failed: ERR=%s\n", dev->bstrerror());
206 if ((dev->is_file() && dev->is_removable()) || dev->is_dvd()) {
208 Dmsg0(150, "call scan_dir_for_vol\n");
210 if (!dev->mount(0)) {
214 if (ok && dev->scan_dir_for_volume(dcr)) {
215 if (dev->open(dcr, mode) >= 0) {
216 break; /* got a valid volume */
219 if (ok && dev->is_dvd()) {
223 if (try_autolabel(false) == try_read_vol) {
224 break; /* created a new volume label */
226 Jmsg3(jcr, M_WARNING, 0, _("Open device %s Volume \"%s\" failed: ERR=%s\n"),
227 dev->print_name(), dcr->VolumeName, dev->bstrerror());
228 Dmsg0(50, "set_unload\n");
229 dev->set_unload(); /* force ask sysop */
231 Dmsg0(150, "goto mount_next_vol\n");
236 * Now check the volume label to make sure we have the right tape mounted
239 switch (check_volume_label(ask, autochanger)) {
241 Dmsg0(50, "set_unload\n");
242 dev->set_unload(); /* want a different Volume */
243 Dmsg0(150, "goto mount_next_vol\n");
254 * See if we have a fresh tape or a tape with data.
256 * Note, if the LabelType is PRE_LABEL, it was labeled
257 * but never written. If so, rewrite the label but set as
258 * VOL_LABEL. We rewind and return the label (reconstructed)
259 * in the block so that in the case of a new tape, data can
260 * be appended just after the block label. If we are writing
261 * a second volume, the calling routine will write the label
262 * before writing the overflow block.
264 * If the tape is marked as Recycle, we rewrite the label.
266 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
267 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
268 if (!rewrite_volume_label(dcr, recycle)) {
269 mark_volume_in_error();
274 * OK, at this point, we have a valid Bacula label, but
275 * we need to position to the end of the volume, since we are
276 * just now putting it into append mode.
278 Dmsg1(100, "Device previously written, moving to end of data. Expect %lld bytes\n",
279 dev->VolCatInfo.VolCatBytes);
280 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
283 if (!dev->eod(dcr)) {
284 Dmsg2(050, "Unable to position to end of data on device %s: ERR=%s\n",
285 dev->print_name(), dev->bstrerror());
286 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device %s: ERR=%s\n"),
287 dev->print_name(), dev->bstrerror());
288 mark_volume_in_error();
291 if (!is_eod_valid()) {
292 Dmsg0(100, "goto mount_next_vol\n");
296 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
297 Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
298 if (!dir_update_volume_info(dcr, false, false)) {
302 /* Return an empty block */
303 empty_block(block); /* we used it for reading so set for write */
306 Dmsg1(150, "set APPEND, normal return from mount_next_write_volume. dev=%s\n",
320 * This routine is meant to be called once the first pass
321 * to ensure that we have a candidate volume to mount.
322 * Otherwise, we ask the sysop to created one.
323 * Note, the the Volumes are locked on entry.
324 * They are unlocked on failure and remain locked on
325 * success. The caller must know this!!!
327 bool DCR::find_a_volume()
330 if (!is_suitable_volume_mounted()) {
331 bool have_vol = false;
332 /* Do we have a candidate volume? */
334 bstrncpy(VolumeName, dev->vol->vol_name, sizeof(VolumeName));
335 have_vol = dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
338 * Get Director's idea of what tape we should have mounted.
342 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
343 while (!dir_find_next_appendable_volume(dcr)) {
344 Dmsg0(200, "not dir_find_next\n");
345 if (job_canceled(jcr)) {
350 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
354 Dmsg0(150, "Again dir_find_next_append...\n");
361 int DCR::check_volume_label(bool &ask, bool &autochanger)
363 int vol_label_status;
365 * If we are writing to a stream device, ASSUME the volume label
368 if (dev->has_cap(CAP_STREAM)) {
369 vol_label_status = VOL_OK;
370 create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
371 dev->VolHdr.LabelType = PRE_LABEL;
373 vol_label_status = read_dev_volume_label(this);
375 if (job_canceled(jcr)) {
379 Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
380 VolCatInfo.VolCatStatus);
382 * At this point, dev->VolCatInfo has what is in the drive, if anything,
383 * and dcr->VolCatInfo has what the Director wants.
385 switch (vol_label_status) {
387 Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
388 dev->VolCatInfo = VolCatInfo; /* structure assignment */
389 break; /* got a Volume */
391 VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
392 char saveVolumeName[MAX_NAME_LENGTH];
394 Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
395 if (dev->is_volume_to_unload()) {
397 goto check_next_volume;
400 /* If not removable, Volume is broken */
401 if (!dev->is_removable()) {
402 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
403 VolumeName, dev->print_name());
404 mark_volume_in_error();
405 goto check_next_volume;
409 * OK, we got a different volume mounted. First save the
410 * requested Volume info (dcr) structure, then query if
411 * this volume is really OK. If not, put back the desired
412 * volume name, mark it not in changer and continue.
414 dcrVolCatInfo = VolCatInfo; /* structure assignment */
415 devVolCatInfo = dev->VolCatInfo; /* structure assignment */
416 /* Check if this is a valid Volume in the pool */
417 bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
418 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
419 if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
420 POOL_MEM vol_info_msg;
421 pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
422 /* Restore desired volume name, note device info out of sync */
423 /* This gets the info regardless of the Pool */
424 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
425 if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
427 * If we get here, we know we cannot write on the Volume,
428 * and we know that we cannot read it either, so it
429 * is not in the autochanger.
431 mark_volume_not_inchanger();
433 dev->VolCatInfo = devVolCatInfo; /* structure assignment */
434 dev->set_unload(); /* unload this volume */
435 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
436 " Current Volume \"%s\" not acceptable because:\n"
438 dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
439 vol_info_msg.c_str());
441 /* Restore saved DCR before continuing */
442 bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
443 VolCatInfo = dcrVolCatInfo; /* structure assignment */
444 goto check_next_volume;
447 * This was not the volume we expected, but it is OK with
448 * the Director, so use it.
450 Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
451 dev->VolCatInfo = VolCatInfo; /* structure assignment */
452 Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
453 if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
454 Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
455 dev->VolHdr.VolumeName, dev->print_name());
457 goto check_next_volume;
459 break; /* got a Volume */
461 * At this point, we assume we have a blank tape mounted.
465 Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
466 mark_volume_in_error();
467 goto check_bail_out; /* we could not write on DVD */
469 /* Fall through wanted */
471 switch (try_autolabel(true)) {
473 goto check_next_volume;
475 goto check_read_volume;
481 /* NOTE! Fall-through wanted. */
484 Dmsg0(200, "VOL_NO_MEDIA or default.\n");
485 /* Send error message */
488 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
491 /* Needed, so the medium can be changed */
492 if (dev->requires_mount()) {
496 goto check_next_volume;
501 return check_next_vol;
507 return check_read_vol;
512 bool DCR::is_suitable_volume_mounted()
514 /* Volume mounted? */
515 if (dev->VolHdr.VolumeName[0] == 0 || dev->swap_dev || dev->must_unload()) {
516 return false; /* no */
518 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
519 return dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
522 bool DCR::do_unload()
524 if (dev->must_unload()) {
525 Dmsg1(100, "must_unload release %s\n", dev->print_name());
531 bool DCR::do_load(bool is_writing)
533 if (dev->must_load()) {
534 Dmsg1(100, "Must load %s\n", dev->print_name());
535 if (autoload_device(this, is_writing, NULL) > 0) {
544 void DCR::do_swapping(bool is_writing)
547 * See if we are asked to swap the Volume from another device
548 * if so, unload the other device here, and attach the
549 * volume to our drive.
552 if (dev->swap_dev->must_unload()) {
554 dev->swap_dev->set_slot(dev->vol->get_slot());
556 Dmsg2(100, "Swap unloading slot=%d %s\n", dev->swap_dev->get_slot(),
557 dev->swap_dev->print_name());
558 unload_dev(this, dev->swap_dev);
561 dev->vol->clear_swapping();
562 Dmsg1(100, "=== set in_use vol=%s\n", dev->vol->vol_name);
563 dev->vol->set_in_use();
564 dev->VolHdr.VolumeName[0] = 0; /* don't yet have right Volume */
566 Dmsg1(100, "No vol on dev=%s\n", dev->print_name());
568 if (dev->swap_dev->vol) {
569 Dmsg2(100, "Vol=%s on dev=%s\n", dev->swap_dev->vol->vol_name,
570 dev->swap_dev->print_name());
572 dev->swap_dev = NULL;
578 * Check if the current position on the volume corresponds to
579 * what is in the catalog.
581 bool DCR::is_eod_valid()
584 char ed1[50], ed2[50];
585 if (dev->VolCatInfo.VolCatBytes == dev->part_start + dev->part_size) {
586 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
587 " part=%d size=%s\n"), VolumeName,
588 dev->part, edit_uint64(dev->VolCatInfo.VolCatBytes,ed1));
590 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on DVD Volume \"%s\" because: "
591 "The sizes do not match! Volume=%s Catalog=%s\n"),
593 edit_uint64(dev->part_start + dev->part_size, ed1),
594 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
595 mark_volume_in_error();
598 } else if (dev->is_tape()) {
600 * Check if we are positioned on the tape at the same place
601 * that the database says we should be.
603 if (dev->VolCatInfo.VolCatFiles == dev->get_file()) {
604 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
605 VolumeName, dev->get_file());
607 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on tape Volume \"%s\" because:\n"
608 "The number of files mismatch! Volume=%u Catalog=%u\n"),
609 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
610 mark_volume_in_error();
613 } else if (dev->is_file()) {
614 char ed1[50], ed2[50];
616 pos = dev->lseek(this, (boffset_t)0, SEEK_END);
617 if (dev->VolCatInfo.VolCatBytes == (uint64_t)pos) {
618 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
619 " size=%s\n"), VolumeName,
620 edit_uint64(dev->VolCatInfo.VolCatBytes, ed1));
622 Mmsg(jcr->errmsg, _("Bacula cannot write on disk Volume \"%s\" because: "
623 "The sizes do not match! Volume=%s Catalog=%s\n"),
625 edit_uint64(pos, ed1),
626 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
627 Jmsg(jcr, M_ERROR, 0, jcr->errmsg);
628 Dmsg0(050, jcr->errmsg);
629 mark_volume_in_error();
638 * If permitted, we label the device, make sure we can do
639 * it by checking that the VolCatBytes is zero => not labeled,
640 * once the Volume is labeled we don't want to label another
641 * blank tape with the same name. For disk, we go ahead and
642 * label it anyway, because the OS insures that there is only
643 * one Volume with that name.
644 * As noted above, at this point dcr->VolCatInfo has what
645 * the Director wants and dev->VolCatInfo has info on the
646 * previous tape (or nothing).
649 * try_next_vol label failed, look for another volume
650 * try_read_vol labeled volume, now re-read the label
651 * try_error hard error (catalog update)
652 * try_default I couldn't do anything
654 int DCR::try_autolabel(bool opened)
658 if (dev->poll && !dev->is_tape()) {
659 return try_default; /* if polling, don't try to create new labels */
661 /* For a tape require it to be opened and read before labeling */
662 if (!opened && dev->is_tape()) {
665 if (dev->has_cap(CAP_LABEL) && (VolCatInfo.VolCatBytes == 0 ||
666 (!dev->is_tape() && strcmp(VolCatInfo.VolCatStatus,
668 Dmsg0(150, "Create volume label\n");
669 /* Create a new Volume label and write it to the device */
670 if (!write_new_volume_label_to_dev(dcr, VolumeName,
671 pool_name, false, /* no relabel */ false /* defer DVD label */)) {
672 Dmsg2(150, "write_vol_label failed. vol=%s, pool=%s\n",
673 VolumeName, pool_name);
675 mark_volume_in_error();
679 Dmsg0(150, "dir_update_vol_info. Set Append\n");
680 /* Copy Director's info into the device info */
681 dev->VolCatInfo = VolCatInfo; /* structure assignment */
682 if (!dir_update_volume_info(dcr, true, true)) { /* indicate tape labeled */
685 Jmsg(dcr->jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
686 VolumeName, dev->print_name());
687 return try_read_vol; /* read label we just wrote */
689 if (!dev->has_cap(CAP_LABEL) && VolCatInfo.VolCatBytes == 0) {
690 Jmsg(jcr, M_WARNING, 0, _("Device %s not configured to autolabel Volumes.\n"),
693 /* If not removable, Volume is broken */
694 if (!dev->is_removable()) {
695 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
696 VolumeName, dev->print_name());
697 mark_volume_in_error();
705 * Mark volume in error in catalog
707 void DCR::mark_volume_in_error()
709 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
711 dev->VolCatInfo = VolCatInfo; /* structure assignment */
712 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
713 Dmsg0(150, "dir_update_vol_info. Set Error.\n");
714 dir_update_volume_info(this, false, false);
716 Dmsg0(50, "set_unload\n");
717 dev->set_unload(); /* must get a new volume */
721 * The Volume is not in the correct slot, so mark this
722 * Volume as not being in the Changer.
724 void DCR::mark_volume_not_inchanger()
726 Jmsg(jcr, M_ERROR, 0, _("Autochanger Volume \"%s\" not found in slot %d.\n"
727 " Setting InChanger to zero in catalog.\n"),
728 VolCatInfo.VolCatName, VolCatInfo.Slot);
729 dev->VolCatInfo = VolCatInfo; /* structure assignment */
730 VolCatInfo.InChanger = false;
731 dev->VolCatInfo.InChanger = false;
732 Dmsg0(400, "update vol info in mount\n");
733 dir_update_volume_info(this, true, false); /* set new status */
737 * Either because we are going to hang a new volume, or because
738 * of explicit user request, we release the current volume.
740 void DCR::release_volume()
742 unload_autochanger(this, -1);
745 Jmsg0(jcr, M_ERROR, 0, _("Hey!!!!! WroteVol non-zero !!!!!\n"));
746 Pmsg0(190, "Hey!!!!! WroteVol non-zero !!!!!\n");
749 * First erase all memory of the current volume
752 dev->block_num = dev->file = 0;
753 dev->EndBlock = dev->EndFile = 0;
754 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
756 /* Force re-read of label */
757 dev->clear_labeled();
760 dev->label_type = B_BACULA_LABEL;
763 if (dev->is_open() && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
767 /* If we have not closed the device, then at least rewind the tape */
768 if (dev->is_open()) {
769 dev->offline_or_rewind();
771 // Dmsg0(50, "set_unload\n");
772 // dev->set_unload();
773 Dmsg0(190, "release_volume\n");
779 * Check to see if the tape position as defined by the OS is
780 * the same as our concept. If it is not,
781 * it means the user has probably manually rewound the tape.
782 * Note, we check only if num_writers == 0, but this code will
783 * also work fine for any number of writers. If num_writers > 0,
784 * we probably should cancel all jobs using this device, or
785 * perhaps even abort the SD, or at a minimum, mark the tape
786 * in error. Another strategy with num_writers == 0, would be
787 * to rewind the tape and do a new eod() request.
789 bool DCR::is_tape_position_ok()
791 if (dev->is_tape() && dev->num_writers == 0) {
792 int32_t file = dev->get_os_tape_file();
793 if (file >= 0 && file != (int32_t)dev->get_file()) {
794 Jmsg(jcr, M_ERROR, 0, _("Invalid tape position on volume \"%s\""
795 " on device %s. Expected %d, got %d\n"),
796 dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
798 * If the current file is greater than zero, it means we probably
799 * have some bad count of EOF marks, so mark tape in error. Otherwise
800 * the operator might have moved the tape, so we just release it
804 mark_volume_in_error();
815 * If we are reading, we come here at the end of the tape
816 * and see if there are more volumes to be mounted.
818 bool mount_next_read_volume(DCR *dcr)
820 DEVICE *dev = dcr->dev;
822 Dmsg2(90, "NumReadVolumes=%d CurReadVolume=%d\n", jcr->NumReadVolumes, jcr->CurReadVolume);
824 volume_unused(dcr); /* release current volume */
826 * End Of Tape -- mount next Volume (if another specified)
828 if (jcr->NumReadVolumes > 1 && jcr->CurReadVolume < jcr->NumReadVolumes) {
830 if (!acquire_device_for_read(dcr)) {
831 Jmsg2(jcr, M_FATAL, 0, _("Cannot open Dev=%s, Vol=%s\n"), dev->print_name(),
835 return true; /* next volume mounted */
837 Dmsg0(90, "End of Device reached.\n");