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 Dmsg0(200, "Device previously written, moving to end of data\n");
279 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
282 if (!dev->eod(dcr)) {
283 Dmsg2(050, "Unable to position to end of data on device %s: ERR=%s\n",
284 dev->print_name(), dev->bstrerror());
285 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device %s: ERR=%s\n"),
286 dev->print_name(), dev->bstrerror());
287 mark_volume_in_error();
290 if (!is_eod_valid()) {
291 Dmsg0(100, "goto mount_next_vol\n");
295 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
296 Dmsg1(150, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
297 if (!dir_update_volume_info(dcr, false, false)) {
301 /* Return an empty block */
302 empty_block(block); /* we used it for reading so set for write */
305 Dmsg1(150, "set APPEND, normal return from mount_next_write_volume. dev=%s\n",
319 * This routine is meant to be called once the first pass
320 * to ensure that we have a candidate volume to mount.
321 * Otherwise, we ask the sysop to created one.
322 * Note, the the Volumes are locked on entry.
323 * They are unlocked on failure and remain locked on
324 * success. The caller must know this!!!
326 bool DCR::find_a_volume()
329 if (!is_suitable_volume_mounted()) {
330 bool have_vol = false;
331 /* Do we have a candidate volume? */
333 bstrncpy(VolumeName, dev->vol->vol_name, sizeof(VolumeName));
334 have_vol = dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
337 * Get Director's idea of what tape we should have mounted.
341 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
342 while (!dir_find_next_appendable_volume(dcr)) {
343 Dmsg0(200, "not dir_find_next\n");
344 if (job_canceled(jcr)) {
349 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
353 Dmsg0(150, "Again dir_find_next_append...\n");
360 int DCR::check_volume_label(bool &ask, bool &autochanger)
362 int vol_label_status;
364 * If we are writing to a stream device, ASSUME the volume label
367 if (dev->has_cap(CAP_STREAM)) {
368 vol_label_status = VOL_OK;
369 create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
370 dev->VolHdr.LabelType = PRE_LABEL;
372 vol_label_status = read_dev_volume_label(this);
374 if (job_canceled(jcr)) {
378 Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
379 VolCatInfo.VolCatStatus);
381 * At this point, dev->VolCatInfo has what is in the drive, if anything,
382 * and dcr->VolCatInfo has what the Director wants.
384 switch (vol_label_status) {
386 Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
387 dev->VolCatInfo = VolCatInfo; /* structure assignment */
388 break; /* got a Volume */
390 VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
391 char saveVolumeName[MAX_NAME_LENGTH];
393 Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
394 if (dev->is_volume_to_unload()) {
396 goto check_next_volume;
399 /* If not removable, Volume is broken */
400 if (!dev->is_removable()) {
401 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
402 VolumeName, dev->print_name());
403 mark_volume_in_error();
404 goto check_next_volume;
408 * OK, we got a different volume mounted. First save the
409 * requested Volume info (dcr) structure, then query if
410 * this volume is really OK. If not, put back the desired
411 * volume name, mark it not in changer and continue.
413 dcrVolCatInfo = VolCatInfo; /* structure assignment */
414 devVolCatInfo = dev->VolCatInfo; /* structure assignment */
415 /* Check if this is a valid Volume in the pool */
416 bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
417 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
418 if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
419 POOL_MEM vol_info_msg;
420 pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
421 /* Restore desired volume name, note device info out of sync */
422 /* This gets the info regardless of the Pool */
423 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
424 if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
426 * If we get here, we know we cannot write on the Volume,
427 * and we know that we cannot read it either, so it
428 * is not in the autochanger.
430 mark_volume_not_inchanger();
432 dev->VolCatInfo = devVolCatInfo; /* structure assignment */
433 dev->set_unload(); /* unload this volume */
434 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
435 " Current Volume \"%s\" not acceptable because:\n"
437 dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
438 vol_info_msg.c_str());
440 /* Restore saved DCR before continuing */
441 bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
442 VolCatInfo = dcrVolCatInfo; /* structure assignment */
443 goto check_next_volume;
446 * This was not the volume we expected, but it is OK with
447 * the Director, so use it.
449 Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
450 dev->VolCatInfo = VolCatInfo; /* structure assignment */
451 Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
452 if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
453 Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
454 dev->VolHdr.VolumeName, dev->print_name());
456 goto check_next_volume;
458 break; /* got a Volume */
460 * At this point, we assume we have a blank tape mounted.
464 Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
465 mark_volume_in_error();
466 goto check_bail_out; /* we could not write on DVD */
468 /* Fall through wanted */
470 switch (try_autolabel(true)) {
472 goto check_next_volume;
474 goto check_read_volume;
480 /* NOTE! Fall-through wanted. */
483 Dmsg0(200, "VOL_NO_MEDIA or default.\n");
484 /* Send error message */
487 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
490 /* Needed, so the medium can be changed */
491 if (dev->requires_mount()) {
495 goto check_next_volume;
500 return check_next_vol;
506 return check_read_vol;
511 bool DCR::is_suitable_volume_mounted()
513 /* Volume mounted? */
514 if (dev->VolHdr.VolumeName[0] == 0 || dev->swap_dev || dev->must_unload()) {
515 return false; /* no */
517 bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
518 return dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE);
521 bool DCR::do_unload()
523 if (dev->must_unload()) {
524 Dmsg1(100, "must_unload release %s\n", dev->print_name());
530 bool DCR::do_load(bool is_writing)
532 if (dev->must_load()) {
533 Dmsg1(100, "Must load %s\n", dev->print_name());
534 if (autoload_device(this, is_writing, NULL) > 0) {
543 void DCR::do_swapping(bool is_writing)
546 * See if we are asked to swap the Volume from another device
547 * if so, unload the other device here, and attach the
548 * volume to our drive.
551 if (dev->swap_dev->must_unload()) {
553 dev->swap_dev->set_slot(dev->vol->get_slot());
555 Dmsg2(100, "Swap unloading slot=%d %s\n", dev->swap_dev->get_slot(),
556 dev->swap_dev->print_name());
557 unload_dev(this, dev->swap_dev);
560 dev->vol->clear_swapping();
561 Dmsg1(100, "=== set in_use vol=%s\n", dev->vol->vol_name);
562 dev->vol->set_in_use();
563 dev->VolHdr.VolumeName[0] = 0; /* don't yet have right Volume */
565 Dmsg1(100, "No vol on dev=%s\n", dev->print_name());
567 if (dev->swap_dev->vol) {
568 Dmsg2(100, "Vol=%s on dev=%s\n", dev->swap_dev->vol->vol_name,
569 dev->swap_dev->print_name());
571 dev->swap_dev = NULL;
577 * Check if the current position on the volume corresponds to
578 * what is in the catalog.
580 bool DCR::is_eod_valid()
583 char ed1[50], ed2[50];
584 if (dev->VolCatInfo.VolCatBytes == dev->part_start + dev->part_size) {
585 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
586 " part=%d size=%s\n"), VolumeName,
587 dev->part, edit_uint64(dev->VolCatInfo.VolCatBytes,ed1));
589 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on DVD Volume \"%s\" because: "
590 "The sizes do not match! Volume=%s Catalog=%s\n"),
592 edit_uint64(dev->part_start + dev->part_size, ed1),
593 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
594 mark_volume_in_error();
597 } else if (dev->is_tape()) {
599 * Check if we are positioned on the tape at the same place
600 * that the database says we should be.
602 if (dev->VolCatInfo.VolCatFiles == dev->get_file()) {
603 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
604 VolumeName, dev->get_file());
606 Jmsg(jcr, M_ERROR, 0, _("Bacula cannot write on tape Volume \"%s\" because:\n"
607 "The number of files mismatch! Volume=%u Catalog=%u\n"),
608 VolumeName, dev->get_file(), dev->VolCatInfo.VolCatFiles);
609 mark_volume_in_error();
612 } else if (dev->is_file()) {
613 char ed1[50], ed2[50];
615 pos = dev->lseek(this, (boffset_t)0, SEEK_END);
616 if (dev->VolCatInfo.VolCatBytes == (uint64_t)pos) {
617 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\""
618 " size=%s\n"), VolumeName,
619 edit_uint64(dev->VolCatInfo.VolCatBytes, ed1));
621 Mmsg(jcr->errmsg, _("Bacula cannot write on disk Volume \"%s\" because: "
622 "The sizes do not match! Volume=%s Catalog=%s\n"),
624 edit_uint64(pos, ed1),
625 edit_uint64(dev->VolCatInfo.VolCatBytes, ed2));
626 Jmsg(jcr, M_ERROR, 0, jcr->errmsg);
627 Dmsg0(050, jcr->errmsg);
628 mark_volume_in_error();
637 * If permitted, we label the device, make sure we can do
638 * it by checking that the VolCatBytes is zero => not labeled,
639 * once the Volume is labeled we don't want to label another
640 * blank tape with the same name. For disk, we go ahead and
641 * label it anyway, because the OS insures that there is only
642 * one Volume with that name.
643 * As noted above, at this point dcr->VolCatInfo has what
644 * the Director wants and dev->VolCatInfo has info on the
645 * previous tape (or nothing).
648 * try_next_vol label failed, look for another volume
649 * try_read_vol labeled volume, now re-read the label
650 * try_error hard error (catalog update)
651 * try_default I couldn't do anything
653 int DCR::try_autolabel(bool opened)
657 if (dev->poll && !dev->is_tape()) {
658 return try_default; /* if polling, don't try to create new labels */
660 /* For a tape require it to be opened and read before labeling */
661 if (!opened && dev->is_tape()) {
664 if (dev->has_cap(CAP_LABEL) && (VolCatInfo.VolCatBytes == 0 ||
665 (!dev->is_tape() && strcmp(VolCatInfo.VolCatStatus,
667 Dmsg0(150, "Create volume label\n");
668 /* Create a new Volume label and write it to the device */
669 if (!write_new_volume_label_to_dev(dcr, VolumeName,
670 pool_name, false, /* no relabel */ false /* defer DVD label */)) {
671 Dmsg2(150, "write_vol_label failed. vol=%s, pool=%s\n",
672 VolumeName, pool_name);
674 mark_volume_in_error();
678 Dmsg0(150, "dir_update_vol_info. Set Append\n");
679 /* Copy Director's info into the device info */
680 dev->VolCatInfo = VolCatInfo; /* structure assignment */
681 if (!dir_update_volume_info(dcr, true, true)) { /* indicate tape labeled */
684 Jmsg(dcr->jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
685 VolumeName, dev->print_name());
686 return try_read_vol; /* read label we just wrote */
688 if (!dev->has_cap(CAP_LABEL) && VolCatInfo.VolCatBytes == 0) {
689 Jmsg(jcr, M_WARNING, 0, _("Device %s not configured to autolabel Volumes.\n"),
692 /* If not removable, Volume is broken */
693 if (!dev->is_removable()) {
694 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
695 VolumeName, dev->print_name());
696 mark_volume_in_error();
704 * Mark volume in error in catalog
706 void DCR::mark_volume_in_error()
708 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
710 dev->VolCatInfo = VolCatInfo; /* structure assignment */
711 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
712 Dmsg0(150, "dir_update_vol_info. Set Error.\n");
713 dir_update_volume_info(this, false, false);
715 Dmsg0(50, "set_unload\n");
716 dev->set_unload(); /* must get a new volume */
720 * The Volume is not in the correct slot, so mark this
721 * Volume as not being in the Changer.
723 void DCR::mark_volume_not_inchanger()
725 Jmsg(jcr, M_ERROR, 0, _("Autochanger Volume \"%s\" not found in slot %d.\n"
726 " Setting InChanger to zero in catalog.\n"),
727 VolCatInfo.VolCatName, VolCatInfo.Slot);
728 dev->VolCatInfo = VolCatInfo; /* structure assignment */
729 VolCatInfo.InChanger = false;
730 dev->VolCatInfo.InChanger = false;
731 Dmsg0(400, "update vol info in mount\n");
732 dir_update_volume_info(this, true, false); /* set new status */
736 * Either because we are going to hang a new volume, or because
737 * of explicit user request, we release the current volume.
739 void DCR::release_volume()
741 unload_autochanger(this, -1);
744 Jmsg0(jcr, M_ERROR, 0, _("Hey!!!!! WroteVol non-zero !!!!!\n"));
745 Pmsg0(190, "Hey!!!!! WroteVol non-zero !!!!!\n");
748 * First erase all memory of the current volume
751 dev->block_num = dev->file = 0;
752 dev->EndBlock = dev->EndFile = 0;
753 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
755 /* Force re-read of label */
756 dev->clear_labeled();
759 dev->label_type = B_BACULA_LABEL;
762 if (dev->is_open() && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
766 /* If we have not closed the device, then at least rewind the tape */
767 if (dev->is_open()) {
768 dev->offline_or_rewind();
770 // Dmsg0(50, "set_unload\n");
771 // dev->set_unload();
772 Dmsg0(190, "release_volume\n");
778 * Check to see if the tape position as defined by the OS is
779 * the same as our concept. If it is not,
780 * it means the user has probably manually rewound the tape.
781 * Note, we check only if num_writers == 0, but this code will
782 * also work fine for any number of writers. If num_writers > 0,
783 * we probably should cancel all jobs using this device, or
784 * perhaps even abort the SD, or at a minimum, mark the tape
785 * in error. Another strategy with num_writers == 0, would be
786 * to rewind the tape and do a new eod() request.
788 bool DCR::is_tape_position_ok()
790 if (dev->is_tape() && dev->num_writers == 0) {
791 int32_t file = dev->get_os_tape_file();
792 if (file >= 0 && file != (int32_t)dev->get_file()) {
793 Jmsg(jcr, M_ERROR, 0, _("Invalid tape position on volume \"%s\""
794 " on device %s. Expected %d, got %d\n"),
795 dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
797 * If the current file is greater than zero, it means we probably
798 * have some bad count of EOF marks, so mark tape in error. Otherwise
799 * the operator might have moved the tape, so we just release it
803 mark_volume_in_error();
814 * If we are reading, we come here at the end of the tape
815 * and see if there are more volumes to be mounted.
817 bool mount_next_read_volume(DCR *dcr)
819 DEVICE *dev = dcr->dev;
821 Dmsg2(90, "NumReadVolumes=%d CurReadVolume=%d\n", jcr->NumReadVolumes, jcr->CurReadVolume);
823 volume_unused(dcr); /* release current volume */
825 * End Of Tape -- mount next Volume (if another specified)
827 if (jcr->NumReadVolumes > 1 && jcr->CurReadVolume < jcr->NumReadVolumes) {
829 if (!acquire_device_for_read(dcr)) {
830 Jmsg2(jcr, M_FATAL, 0, _("Cannot open Dev=%s, Vol=%s\n"), dev->print_name(),
834 return true; /* next volume mounted */
836 Dmsg0(90, "End of Device reached.\n");