2 Bacula® - The Network Backup Solution
4 Copyright (C) 2000-2008 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 John Walker.
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.
29 * Drive reservation functions for Storage Daemon
33 * Split from job.c and acquire.c June 2005
42 const int dbglvl = 50;
44 static dlist *vol_list = NULL;
45 static brwlock_t reservation_lock;
46 static brwlock_t vol_list_lock;
48 /* Forward referenced functions */
49 static int can_reserve_drive(DCR *dcr, RCTX &rctx);
50 static int reserve_device(RCTX &rctx);
51 static bool reserve_device_for_read(DCR *dcr);
52 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx);
53 static bool use_storage_cmd(JCR *jcr);
54 static void queue_reserve_message(JCR *jcr);
55 static void pop_reserve_messages(JCR *jcr);
56 //void switch_device(DCR *dcr, DEVICE *dev);
58 /* Requests from the Director daemon */
59 static char use_storage[] = "use storage=%127s media_type=%127s "
60 "pool_name=%127s pool_type=%127s append=%d copy=%d stripe=%d\n";
61 static char use_device[] = "use device=%127s\n";
63 /* Responses sent to Director daemon */
64 static char OK_device[] = "3000 OK use device device=%s\n";
65 static char NO_device[] = "3924 Device \"%s\" not in SD Device resources.\n";
66 static char BAD_use[] = "3913 Bad use command: %s\n";
68 bool use_cmd(JCR *jcr)
71 * Get the device, media, and pool information
73 if (!use_storage_cmd(jcr)) {
74 set_jcr_job_status(jcr, JS_ErrorTerminated);
75 memset(jcr->sd_auth_key, 0, strlen(jcr->sd_auth_key));
81 static int my_compare(void *item1, void *item2)
83 return strcmp(((VOLRES *)item1)->vol_name, ((VOLRES *)item2)->vol_name);
87 * This allows a given thread to recursively call lock_reservations.
88 * It must, of course, call unlock_... the same number of times.
90 void init_reservations_lock()
93 if ((errstat=rwl_init(&reservation_lock)) != 0) {
95 Emsg1(M_ABORT, 0, _("Unable to initialize reservation lock. ERR=%s\n"),
96 be.bstrerror(errstat));
99 if ((errstat=rwl_init(&vol_list_lock)) != 0) {
101 Emsg1(M_ABORT, 0, _("Unable to initialize volume list lock. ERR=%s\n"),
102 be.bstrerror(errstat));
106 void term_reservations_lock()
108 rwl_destroy(&reservation_lock);
109 rwl_destroy(&vol_list_lock);
112 int reservations_lock_count = 0;
114 /* This applies to a drive and to Volumes */
115 void _lock_reservations()
118 reservations_lock_count++;
119 if ((errstat=rwl_writelock(&reservation_lock)) != 0) {
121 Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
122 errstat, be.bstrerror(errstat));
126 void _unlock_reservations()
129 reservations_lock_count--;
130 if ((errstat=rwl_writeunlock(&reservation_lock)) != 0) {
132 Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
133 errstat, be.bstrerror(errstat));
137 int vol_list_lock_count = 0;
140 * This allows a given thread to recursively call to lock_volumes()
145 vol_list_lock_count++;
146 if ((errstat=rwl_writelock(&vol_list_lock)) != 0) {
148 Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
149 errstat, be.bstrerror(errstat));
153 void _unlock_volumes()
156 vol_list_lock_count--;
157 if ((errstat=rwl_writeunlock(&vol_list_lock)) != 0) {
159 Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
160 errstat, be.bstrerror(errstat));
166 * List Volumes -- this should be moved to status.c
173 void debug_list_volumes(const char *imsg)
176 POOL_MEM msg(PM_MESSAGE);
179 foreach_dlist(vol, vol_list) {
181 Mmsg(msg, "List %s: %s in_use=%d on device %s\n", imsg,
182 vol->vol_name, vol->is_in_use(), vol->dev->print_name());
184 Mmsg(msg, "List %s: %s in_use=%d no dev\n", imsg, vol->vol_name,
187 Dmsg1(dbglvl, "%s", msg.c_str());
192 foreach_dlist(vol, vol_list) {
193 if (vol->dev == dev) {
194 Dmsg0(dbglvl, "Two Volumes on same device.\n");
206 * List Volumes -- this should be moved to status.c
208 void list_volumes(void sendit(const char *msg, int len, void *sarg), void *arg)
211 POOL_MEM msg(PM_MESSAGE);
215 foreach_dlist(vol, vol_list) {
216 DEVICE *dev = vol->dev;
218 len = Mmsg(msg, "%s on device %s\n", vol->vol_name, dev->print_name());
219 sendit(msg.c_str(), len, arg);
220 len = Mmsg(msg, " Reader=%d writers=%d devres=%d volinuse=%d\n",
221 dev->can_read()?1:0, dev->num_writers, dev->num_reserved(),
223 sendit(msg.c_str(), len, arg);
225 len = Mmsg(msg, "%s no device. volinuse= %d\n", vol->vol_name,
227 sendit(msg.c_str(), len, arg);
234 * Create a Volume item to put in the Volume list
235 * Ensure that the device points to it.
237 static VOLRES *new_vol_item(DCR *dcr, const char *VolumeName)
240 vol = (VOLRES *)malloc(sizeof(VOLRES));
241 memset(vol, 0, sizeof(VOLRES));
242 vol->vol_name = bstrdup(VolumeName);
244 Dmsg3(dbglvl, "new Vol=%s at %p dev=%s\n",
245 VolumeName, vol->vol_name, vol->dev->print_name());
249 static void free_vol_item(VOLRES *vol)
264 * Put a new Volume entry in the Volume list. This
265 * effectively reserves the volume so that it will
266 * not be mounted again.
268 * If the device has any current volume associated with it,
269 * and it is a different Volume, and the device is not busy,
270 * we release the old Volume item and insert the new one.
272 * It is assumed that the device is free and locked so that
273 * we can change the device structure.
275 * Some details of the Volume list handling:
277 * 1. The Volume list entry must be attached to the drive (rather than
278 * attached to a job as it currently is. I.e. the drive that "owns"
279 * the volume (in use, mounted)
280 * must point to the volume (still to be maintained in a list).
282 * 2. The Volume is entered in the list when a drive is reserved.
284 * 3. When a drive is in use, the device code must appropriately update the
285 * volume name as it changes (currently the list is static -- an entry is
286 * removed when the Volume is no longer reserved, in use or mounted).
287 * The new code must keep the same list entry as long as the drive
288 * has any volume associated with it but the volume name in the list
289 * must be updated when the drive has a different volume mounted.
291 * 4. A job that has reserved a volume, can un-reserve the volume, and if the
292 * volume is not mounted, and not reserved, and not in use, it will be
293 * removed from the list.
295 * 5. If a job wants to reserve a drive with a different Volume from the one on
296 * the drive, it can re-use the drive for the new Volume.
298 * 6. If a job wants a Volume that is in a different drive, it can either use the
299 * other drive or take the volume, only if the other drive is not in use or
302 * One nice aspect of this is that the reserve use count and the writer use count
303 * already exist and are correctly programmed and will need no changes -- use
304 * counts are always very tricky.
306 * The old code had a concept of "reserving" a Volume, but was changed
307 * to reserving and using a drive. A volume is must be attached to (owned by) a
308 * drive and can move from drive to drive or be unused given certain specific
309 * conditions of the drive. The key is that the drive must "own" the Volume.
310 * The old code had the job (dcr) owning the volume (more or less). The job was
311 * to change the insertion and removal of the volumes from the list to be based
312 * on the drive rather than the job.
314 * Return: VOLRES entry on success
315 * NULL volume busy on another drive
317 VOLRES *reserve_volume(DCR *dcr, const char *VolumeName)
320 DEVICE * volatile dev = dcr->dev;
324 Dmsg2(dbglvl, "enter reserve_volume=%s drive=%s\n", VolumeName,
325 dcr->dev->print_name());
327 * We lock the reservations system here to ensure
328 * when adding a new volume that no newly scheduled
329 * job can reserve it.
332 debug_list_volumes("begin reserve_volume");
334 * First, remove any old volume attached to this device as it
339 Dmsg4(dbglvl, "Vol attached=%s, newvol=%s volinuse=%d on %s\n",
340 vol->vol_name, VolumeName, vol->is_in_use(), dev->print_name());
342 * Make sure we don't remove the current volume we are inserting
343 * because it was probably inserted by another job, or it
344 * is not being used and is marked as not reserved.
346 if (strcmp(vol->vol_name, VolumeName) == 0) {
347 Dmsg2(dbglvl, "=== set reserved vol=%s dev=%s\n", VolumeName,
348 vol->dev->print_name());
349 vol->set_in_use(); /* retake vol if released previously */
350 dcr->reserved_volume = true; /* reserved volume */
351 goto get_out; /* Volume already on this device */
353 /* Don't release a volume if it was reserved by someone other than us */
354 if (vol->is_in_use() && !dcr->reserved_volume) {
355 Dmsg1(dbglvl, "Cannot free vol=%s. It is reserved.\n", vol->vol_name);
356 vol = NULL; /* vol in use */
359 Dmsg2(dbglvl, "reserve_vol free vol=%s at %p\n", vol->vol_name, vol->vol_name);
361 dev->set_unload(); /* have to unload current volume */
362 debug_list_volumes("reserve_vol free");
366 /* Create a new Volume entry */
367 nvol = new_vol_item(dcr, VolumeName);
370 * Now try to insert the new Volume
372 vol = (VOLRES *)vol_list->binary_insert(nvol, my_compare);
374 Dmsg2(dbglvl, "Found vol=%s dev-same=%d\n", vol->vol_name, dev==vol->dev);
376 * At this point, a Volume with this name already is in the list,
377 * so we simply release our new Volume entry. Note, this should
378 * only happen if we are moving the volume from one drive to another.
380 Dmsg2(dbglvl, "reserve_vol free-tmp vol=%s at %p\n",
381 vol->vol_name, vol->vol_name);
383 * Clear dev pointer so that free_vol_item() doesn't
384 * take away our volume.
386 nvol->dev = NULL; /* don't zap dev entry */
390 * Check if we are trying to use the Volume on a different drive
392 * vol->dev is where the Volume we want is
394 if (dev != vol->dev) {
395 /* Caller wants to switch Volume to another device */
396 if (!vol->dev->is_busy() && !vol->is_swapping()) {
398 Dmsg3(dbglvl, "==== Swap vol=%s from dev=%s to %s\n",
399 VolumeName, vol->dev->print_name(), dev->print_name());
400 free_volume(dev); /* free any volume attached to our drive */
401 dcr->dev = vol->dev; /* temp point to other dev */
402 slot = get_autochanger_loaded_slot(dcr); /* get slot */
403 dcr->dev = dev; /* restore dev */
404 vol->set_slot(slot); /* save slot */
405 vol->dev->set_unload(); /* unload the other drive */
406 vol->set_swapping(); /* swap from other drive */
407 dev->swap_dev = vol->dev; /* remember to get this vol */
408 dev->set_load(); /* then reload on our drive */
409 vol->dev->vol = NULL; /* remove volume from other drive */
410 vol->dev = dev; /* point the Volume at our drive */
411 dev->vol = vol; /* point our drive at the Volume */
413 Dmsg3(dbglvl, "==== Swap not possible Vol busy vol=%s from dev=%s to %s\n",
414 VolumeName, vol->dev->print_name(), dev->print_name());
415 vol = NULL; /* device busy */
422 dev->vol = vol; /* point to newly inserted volume */
427 Dmsg2(dbglvl, "=== set in_use. vol=%s dev=%s\n", vol->vol_name,
428 vol->dev->print_name());
430 dcr->reserved_volume = true;
432 debug_list_volumes("end new volume");
438 * Switch from current device to given device
442 void switch_device(DCR *dcr, DEVICE *dev)
447 memcpy(&save_dcr, dcr, sizeof(save_dcr));
448 clean_device(dcr); /* clean up the dcr */
450 dcr->dev = dev; /* get new device pointer */
451 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
452 dcr->dev->print_name());
454 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
455 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
456 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
457 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
458 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
459 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
461 // dcr->set_reserved();
468 * Search for a Volume name in the Volume list.
470 * Returns: VOLRES entry on success
471 * NULL if the Volume is not in the list
473 VOLRES *find_volume(const char *VolumeName)
476 /* Do not lock reservations here */
478 vol.vol_name = bstrdup(VolumeName);
479 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
481 Dmsg2(dbglvl, "find_vol=%s found=%d\n", VolumeName, fvol!=NULL);
482 debug_list_volumes("find_volume");
487 void DCR::set_reserved()
490 Dmsg2(dbglvl, "Inc reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
494 void DCR::clear_reserved()
499 Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
504 * Remove any reservation from a drive and tell the system
505 * that the volume is unused at least by us.
507 void DCR::unreserve_device()
512 reserved_volume = false;
513 /* If we set read mode in reserving, remove it */
514 if (dev->can_read()) {
517 if (dev->num_writers < 0) {
518 Jmsg1(jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
519 dev->num_writers = 0;
521 if (dev->num_reserved() == 0 && dev->num_writers == 0) {
529 * Free a Volume from the Volume list if it is no longer used
530 * Note, for tape drives we want to remember where the Volume
531 * was when last used, so rather than free the volume entry,
532 * we simply mark it "not reserved" so when the drive is really
533 * needed for another volume, we can reuse it.
535 * Returns: true if the Volume found and "removed" from the list
536 * false if the Volume is not in the list or is in use
538 bool volume_unused(DCR *dcr)
540 DEVICE *dev = dcr->dev;
543 Dmsg1(dbglvl, "vol_unused: no vol on %s\n", dev->print_name());
544 debug_list_volumes("null vol cannot unreserve_volume");
547 if (dev->vol->is_swapping()) {
548 Dmsg1(dbglvl, "vol_unused: vol being swapped on %s\n", dev->print_name());
549 debug_list_volumes("swapping vol cannot unreserve_volume");
554 if (dev->is_busy()) {
555 Dmsg1(dbglvl, "vol_unused: busy on %s\n", dev->print_name());
556 debug_list_volumes("dev busy cannot unreserve_volume");
561 if (dev->num_writers > 0 || dev->num_reserved() > 0) {
567 * If this is a tape, we do not free the volume, rather we wait
568 * until the autoloader unloads it, or until another tape is
569 * explicitly read in this drive. This allows the SD to remember
570 * where the tapes are or last were.
572 Dmsg4(dbglvl, "=== set not reserved vol=%s num_writers=%d dev_reserved=%d dev=%s\n",
573 dev->vol->vol_name, dev->num_writers, dev->num_reserved(), dev->print_name());
574 dev->vol->clear_in_use();
575 if (dev->is_tape() || dev->is_autochanger()) {
579 * Note, this frees the volume reservation entry, but the
580 * file descriptor remains open with the OS.
582 return free_volume(dev);
587 * Unconditionally release the volume entry
589 bool free_volume(DEVICE *dev)
593 if (dev->vol == NULL) {
594 Dmsg1(dbglvl, "No vol on dev %s\n", dev->print_name());
599 /* Don't free a volume while it is being swapped */
600 if (!vol->is_swapping()) {
602 vol_list->remove(vol);
603 Dmsg2(dbglvl, "=== free_volume %s dev=%s\n", vol->vol_name, dev->print_name());
605 debug_list_volumes("free_volume");
612 /* Create the Volume list */
613 void create_volume_list()
616 if (vol_list == NULL) {
617 vol_list = New(dlist(vol, &vol->link));
621 /* Release all Volumes from the list */
622 void free_volume_list()
629 foreach_dlist(vol, vol_list) {
631 Dmsg2(dbglvl, "free vol_list Volume=%s dev=%s\n", vol->vol_name, vol->dev->print_name());
633 Dmsg1(dbglvl, "free vol_list Volume=%s No dev\n", vol->vol_name);
636 vol->vol_name = NULL;
643 bool DCR::can_i_use_volume()
649 vol = find_volume(VolumeName);
651 Dmsg1(dbglvl, "Vol=%s not in use.\n", VolumeName);
652 goto get_out; /* vol not in list */
654 ASSERT(vol->dev != NULL);
656 if (dev == vol->dev) { /* same device OK */
657 Dmsg1(dbglvl, "Vol=%s on same dev.\n", VolumeName);
660 Dmsg3(dbglvl, "Vol=%s on %s we have %s\n", VolumeName,
661 vol->dev->print_name(), dev->print_name());
663 /* ***FIXME*** check this ... */
664 if (!vol->dev->is_busy()) {
665 Dmsg2(dbglvl, "Vol=%s dev=%s not busy.\n", VolumeName, vol->dev->print_name());
668 Dmsg2(dbglvl, "Vol=%s dev=%s busy.\n", VolumeName, vol->dev->print_name());
670 Dmsg2(dbglvl, "Vol=%s in use by %s.\n", VolumeName, vol->dev->print_name());
681 * We get the following type of information:
683 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
687 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
691 static bool use_storage_cmd(JCR *jcr)
693 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
694 BSOCK *dir = jcr->dir_bsock;
702 memset(&rctx, 0, sizeof(RCTX));
705 * If there are multiple devices, the director sends us
706 * use_device for each device that it wants to use.
708 dirstore = New(alist(10, not_owned_by_alist));
709 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
711 Dmsg1(dbglvl, "<dird: %s", dir->msg);
712 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
713 media_type.c_str(), pool_name.c_str(),
714 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
719 jcr->write_store = dirstore;
721 jcr->read_store = dirstore;
723 rctx.append = append;
724 unbash_spaces(store_name);
725 unbash_spaces(media_type);
726 unbash_spaces(pool_name);
727 unbash_spaces(pool_type);
728 store = new DIRSTORE;
729 dirstore->append(store);
730 memset(store, 0, sizeof(DIRSTORE));
731 store->device = New(alist(10));
732 bstrncpy(store->name, store_name, sizeof(store->name));
733 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
734 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
735 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
736 store->append = append;
738 /* Now get all devices */
739 while (dir->recv() >= 0) {
740 Dmsg1(dbglvl, "<dird device: %s", dir->msg);
741 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
745 unbash_spaces(dev_name);
746 store->device->append(bstrdup(dev_name.c_str()));
748 } while (ok && dir->recv() >= 0);
750 /* Developer debug code */
752 if (debug_level >= dbglvl) {
753 foreach_alist(store, dirstore) {
754 Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
755 store->name, store->media_type, store->pool_name,
756 store->pool_type, store->append);
757 foreach_alist(device_name, store->device) {
758 Dmsg1(dbglvl, " Device=%s\n", device_name);
763 init_jcr_device_wait_timers(jcr);
764 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
766 BSOCK *dir = jcr->dir_bsock;
767 dir->fsend(_("3939 Could not get dcr\n"));
768 Dmsg1(dbglvl, ">dird: %s", dir->msg);
772 * At this point, we have a list of all the Director's Storage
773 * resources indicated for this Job, which include Pool, PoolType,
774 * storage name, and Media type.
775 * Then for each of the Storage resources, we have a list of
776 * device names that were given.
778 * Wiffle through them and find one that can do the backup.
781 int wait_for_device_retries = 0;
784 rctx.notify_dir = true;
787 for ( ; !fail && !job_canceled(jcr); ) {
788 pop_reserve_messages(jcr);
789 rctx.suitable_device = false;
790 rctx.have_volume = false;
791 rctx.VolumeName[0] = 0;
792 rctx.any_drive = false;
793 if (!jcr->PreferMountedVols) {
795 * Here we try to find a drive that is not used.
796 * This will maximize the use of available drives.
799 rctx.num_writers = 20000000; /* start with impossible number */
800 rctx.low_use_drive = NULL;
801 rctx.PreferMountedVols = false;
802 rctx.exact_match = false;
803 rctx.autochanger_only = true;
804 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
807 /* Look through all drives possibly for low_use drive */
808 if (rctx.low_use_drive) {
809 rctx.try_low_use_drive = true;
810 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
813 rctx.try_low_use_drive = false;
815 rctx.autochanger_only = false;
816 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
821 * Now we look for a drive that may or may not be in
824 /* Look for an exact Volume match all drives */
825 rctx.PreferMountedVols = true;
826 rctx.exact_match = true;
827 rctx.autochanger_only = false;
828 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
831 /* Look for any mounted drive */
832 rctx.exact_match = false;
833 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
837 rctx.any_drive = true;
838 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
841 /* Keep reservations locked *except* during wait_for_device() */
842 unlock_reservations();
844 * The idea of looping on repeat a few times it to ensure
845 * that if there is some subtle timing problem between two
846 * jobs, we will simply try again, and most likely succeed.
847 * This can happen if one job reserves a drive or finishes using
848 * a drive at the same time a second job wants it.
850 if (repeat++ > 1) { /* try algorithm 3 times */
851 bmicrosleep(30, 0); /* wait a bit */
852 Dmsg0(dbglvl, "repeat reserve algorithm\n");
853 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
854 Dmsg0(dbglvl, "Fail. !suitable_device || !wait_for_device\n");
858 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
860 unlock_reservations();
863 * If we get here, there are no suitable devices available, which
864 * means nothing configured. If a device is suitable but busy
865 * with another Volume, we will not come here.
867 unbash_spaces(dir->msg);
868 pm_strcpy(jcr->errmsg, dir->msg);
869 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
870 Jmsg(jcr, M_FATAL, 0, _("\n"
871 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
872 dev_name.c_str(), media_type.c_str());
873 dir->fsend(NO_device, dev_name.c_str());
875 Dmsg1(dbglvl, ">dird: %s", dir->msg);
878 unbash_spaces(dir->msg);
879 pm_strcpy(jcr->errmsg, dir->msg);
880 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
881 dir->fsend(BAD_use, jcr->errmsg);
882 Dmsg1(dbglvl, ">dird: %s", dir->msg);
885 release_reserve_messages(jcr);
891 * Walk through the autochanger resources and check if
892 * the volume is in one of them.
894 * Returns: true if volume is in device
897 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
899 AUTOCHANGER *changer = vol->dev->device->changer_res;
901 /* Find resource, and make sure we were able to open it */
902 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
903 Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
906 Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
911 * Search for a device suitable for this job.
912 * Note, this routine sets sets rctx.suitable_device if any
913 * device exists within the SD. The device may not be actually
915 * It also returns if it finds a useable device.
917 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
926 dirstore = jcr->write_store;
928 dirstore = jcr->read_store;
930 Dmsg5(dbglvl, "Start find_suit_dev PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
931 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
932 rctx.autochanger_only, rctx.any_drive);
935 * If the appropriate conditions of this if are met, namely that
936 * we are appending and the user wants mounted drive (or we
937 * force try a mounted drive because they are all busy), we
938 * start by looking at all the Volumes in the volume list.
940 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
941 dlist *temp_vol_list, *save_vol_list;
944 Dmsg0(dbglvl, "lock volumes\n");
947 * Create a temporary copy of the volume list. We do this,
948 * to avoid having the volume list locked during the
949 * call to reserve_device(), which would cause a deadlock.
950 * Note, we may want to add an update counter on the vol_list
951 * so that if it is modified while we are traversing the copy
952 * we can take note and act accordingly (probably redo the
953 * search at least a few times).
955 Dmsg0(dbglvl, "duplicate vol list\n");
956 temp_vol_list = New(dlist(vol, &vol->link));
957 foreach_dlist(vol, vol_list) {
959 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
960 memset(tvol, 0, sizeof(VOLRES));
961 tvol->vol_name = bstrdup(vol->vol_name);
962 tvol->dev = vol->dev;
963 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
965 tvol->dev = NULL; /* don't zap dev entry */
967 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
968 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
971 Dmsg0(dbglvl, "unlock volumes\n");
974 /* Look through reserved volumes for one we can use */
975 Dmsg0(dbglvl, "look for vol in vol list\n");
976 foreach_dlist(vol, temp_vol_list) {
978 Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
981 /* Check with Director if this Volume is OK */
982 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
983 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
987 Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
988 foreach_alist(store, dirstore) {
991 foreach_alist(device_name, store->device) {
992 /* Found a device, try to use it */
993 rctx.device_name = device_name;
994 rctx.device = vol->dev->device;
996 if (vol->dev->is_autochanger()) {
997 Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
998 if (!is_vol_in_autochanger(rctx, vol)) {
1001 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
1002 Dmsg2(dbglvl, "device=%s not suitable want %s\n",
1003 vol->dev->device->hdr.name, device_name);
1007 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
1008 rctx.have_volume = true;
1009 /* Try reserving this device and volume */
1010 Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
1011 stat = reserve_device(rctx);
1012 if (stat == 1) { /* found available device */
1013 Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
1016 } else if (stat == 0) { /* device busy */
1017 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
1019 /* otherwise error */
1020 Dmsg0(dbglvl, "No suitable device found.\n");
1022 rctx.have_volume = false;
1023 rctx.VolumeName[0] = 0;
1032 } /* end for loop over reserved volumes */
1034 Dmsg0(dbglvl, "lock volumes\n");
1036 save_vol_list = vol_list;
1037 vol_list = temp_vol_list;
1038 free_volume_list(); /* release temp_vol_list */
1039 vol_list = save_vol_list;
1040 Dmsg0(dbglvl, "deleted temp vol list\n");
1041 Dmsg0(dbglvl, "unlock volumes\n");
1043 debug_list_volumes("after free temp table");
1046 Dmsg1(dbglvl, "OK dev found. Vol=%s from in-use vols list\n", rctx.VolumeName);
1051 * No reserved volume we can use, so now search for an available device.
1053 * For each storage device that the user specified, we
1054 * search and see if there is a resource for that device.
1056 foreach_alist(store, dirstore) {
1058 foreach_alist(device_name, store->device) {
1060 rctx.device_name = device_name;
1061 stat = search_res_for_device(rctx);
1062 if (stat == 1) { /* found available device */
1063 Dmsg1(dbglvl, "available device found=%s\n", device_name);
1066 } else if (stat == 0) { /* device busy */
1067 Dmsg1(dbglvl, "No usable device=%s, busy: not use\n", device_name);
1069 /* otherwise error */
1070 Dmsg0(dbglvl, "No usable device found.\n");
1078 Dmsg1(dbglvl, "OK dev found. Vol=%s\n", rctx.VolumeName);
1080 Dmsg0(dbglvl, "Leave find_suit_dev: no dev found.\n");
1086 * Search for a particular storage device with particular storage
1087 * characteristics (MediaType).
1089 int search_res_for_device(RCTX &rctx)
1091 AUTOCHANGER *changer;
1094 Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
1095 /* Look through Autochangers first */
1096 foreach_res(changer, R_AUTOCHANGER) {
1097 Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
1098 /* Find resource, and make sure we were able to open it */
1099 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1100 /* Try each device in this AutoChanger */
1101 foreach_alist(rctx.device, changer->device) {
1102 Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
1103 stat = reserve_device(rctx);
1104 if (stat != 1) { /* try another device */
1108 if (rctx.store->append == SD_APPEND) {
1109 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1110 rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
1112 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1113 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
1120 /* Now if requested look through regular devices */
1121 if (!rctx.autochanger_only) {
1122 foreach_res(rctx.device, R_DEVICE) {
1123 Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
1124 /* Find resource, and make sure we were able to open it */
1125 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1126 stat = reserve_device(rctx);
1127 if (stat != 1) { /* try another device */
1131 if (rctx.store->append == SD_APPEND) {
1132 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1133 rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
1135 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1136 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
1142 return -1; /* nothing found */
1146 * Try to reserve a specific device.
1148 * Returns: 1 -- OK, have DCR
1152 static int reserve_device(RCTX &rctx)
1156 const int name_len = MAX_NAME_LENGTH;
1158 /* Make sure MediaType is OK */
1159 Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
1160 rctx.device->media_type, rctx.store->media_type);
1161 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1165 /* Make sure device exists -- i.e. we can stat() it */
1166 if (!rctx.device->dev) {
1167 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1169 if (!rctx.device->dev) {
1170 if (rctx.device->changer_res) {
1171 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1172 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1173 rctx.device->hdr.name, rctx.device_name);
1175 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1176 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1179 return -1; /* no use waiting */
1182 rctx.suitable_device = true;
1183 Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
1184 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1186 BSOCK *dir = rctx.jcr->dir_bsock;
1187 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1188 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1191 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1192 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1193 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1194 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1195 if (rctx.store->append == SD_APPEND) {
1196 Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
1197 ok = reserve_device_for_append(dcr, rctx);
1202 rctx.jcr->dcr = dcr;
1203 Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1204 dcr->dev->num_reserved(),
1205 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1206 Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
1207 rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
1208 if (rctx.have_volume) {
1209 Dmsg0(dbglvl, "Call reserve_volume\n");
1210 if (reserve_volume(dcr, rctx.VolumeName)) {
1211 Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
1213 Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
1217 dcr->any_volume = true;
1218 Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
1219 if (dir_find_next_appendable_volume(dcr)) {
1220 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1221 rctx.have_volume = true;
1222 Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
1224 Dmsg0(dbglvl, "No next volume found\n");
1225 rctx.have_volume = false;
1226 rctx.VolumeName[0] = 0;
1228 * If there is at least one volume that is valid and in use,
1229 * but we get here, check if we are running with prefers
1230 * non-mounted drives. In that case, we have selected a
1231 * non-used drive and our one and only volume is mounted
1232 * elsewhere, so we bail out and retry using that drive.
1234 if (dcr->found_in_use() && !rctx.PreferMountedVols) {
1235 rctx.PreferMountedVols = true;
1236 if (dcr->VolumeName[0]) {
1237 dcr->unreserve_device();
1242 * Note. Under some circumstances, the Director can hand us
1243 * a Volume name that is not the same as the one on the current
1244 * drive, and in that case, the call above to find the next
1245 * volume will fail because in attempting to reserve the Volume
1246 * the code will realize that we already have a tape mounted,
1247 * and it will fail. This *should* only happen if there are
1248 * writers, thus the following test. In that case, we simply
1249 * bail out, and continue waiting, rather than plunging on
1250 * and hoping that the operator can resolve the problem.
1252 if (dcr->dev->num_writers != 0) {
1253 if (dcr->VolumeName[0]) {
1254 dcr->unreserve_device();
1261 ok = reserve_device_for_read(dcr);
1263 rctx.jcr->read_dcr = dcr;
1264 Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1265 dcr->dev->num_reserved(),
1266 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1273 if (rctx.notify_dir) {
1275 BSOCK *dir = rctx.jcr->dir_bsock;
1276 pm_strcpy(dev_name, rctx.device->hdr.name);
1277 bash_spaces(dev_name);
1278 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1279 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1286 rctx.have_volume = false;
1287 rctx.VolumeName[0] = 0;
1288 Dmsg0(dbglvl, "Not OK.\n");
1293 * We "reserve" the drive by setting the ST_READ bit. No one else
1294 * should touch the drive until that is cleared.
1295 * This allows the DIR to "reserve" the device before actually
1298 static bool reserve_device_for_read(DCR *dcr)
1300 DEVICE *dev = dcr->dev;
1301 JCR *jcr = dcr->jcr;
1308 if (is_device_unmounted(dev)) {
1309 Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
1310 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1311 jcr->JobId, dev->print_name());
1312 queue_reserve_message(jcr);
1316 if (dev->is_busy()) {
1317 Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1319 dev->state & ST_READ?1:0, dev->num_writers, dev->num_reserved());
1320 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1321 jcr->JobId, dev->print_name());
1322 queue_reserve_message(jcr);
1326 dev->clear_append();
1329 dcr->set_reserved();
1338 * We reserve the device for appending by incrementing
1339 * num_reserved(). We do virtually all the same work that
1340 * is done in acquire_device_for_append(), but we do
1341 * not attempt to mount the device. This routine allows
1342 * the DIR to reserve multiple devices before *really*
1343 * starting the job. It also permits the SD to refuse
1344 * certain devices (not up, ...).
1346 * Note, in reserving a device, if the device is for the
1347 * same pool and the same pool type, then it is acceptable.
1348 * The Media Type has already been checked. If we are
1349 * the first tor reserve the device, we put the pool
1350 * name and pool type in the device record.
1352 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1354 JCR *jcr = dcr->jcr;
1355 DEVICE *dev = dcr->dev;
1362 /* If device is being read, we cannot write it */
1363 if (dev->can_read()) {
1364 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1365 jcr->JobId, dev->print_name());
1366 Dmsg1(dbglvl, "%s", jcr->errmsg);
1367 queue_reserve_message(jcr);
1371 /* If device is unmounted, we are out of luck */
1372 if (is_device_unmounted(dev)) {
1373 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1374 jcr->JobId, dev->print_name());
1375 Dmsg1(dbglvl, "%s", jcr->errmsg);
1376 queue_reserve_message(jcr);
1380 Dmsg1(dbglvl, "reserve_append device is %s\n", dev->print_name());
1382 /* Now do detailed tests ... */
1383 if (can_reserve_drive(dcr, rctx) != 1) {
1384 Dmsg0(dbglvl, "can_reserve_drive!=1\n");
1388 dcr->set_reserved();
1396 static int is_pool_ok(DCR *dcr)
1398 DEVICE *dev = dcr->dev;
1399 JCR *jcr = dcr->jcr;
1401 /* Now check if we want the same Pool and pool type */
1402 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1403 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1404 /* OK, compatible device */
1405 Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
1408 /* Drive Pool not suitable for us */
1409 Mmsg(jcr->errmsg, _(
1410 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1411 (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
1412 dev->num_reserved(), dev->print_name());
1413 queue_reserve_message(jcr);
1414 Dmsg2(dbglvl, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1415 dev->pool_name, dcr->pool_name);
1420 static bool is_max_jobs_ok(DCR *dcr)
1422 DEVICE *dev = dcr->dev;
1423 JCR *jcr = dcr->jcr;
1425 Dmsg5(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Status=%s Vol=%s\n",
1426 dcr->VolCatInfo.VolCatMaxJobs,
1427 dcr->VolCatInfo.VolCatJobs, dev->num_reserved(),
1428 dcr->VolCatInfo.VolCatStatus,
1430 if (strcmp(dcr->VolCatInfo.VolCatStatus, "Recycle") == 0) {
1433 if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
1434 (dcr->VolCatInfo.VolCatJobs + dev->num_reserved())) {
1435 /* Max Job Vols depassed or already reserved */
1436 Mmsg(jcr->errmsg, _("3610 JobId=%u Volume max jobs exceeded on drive %s.\n"),
1437 (uint32_t)jcr->JobId, dev->print_name());
1438 queue_reserve_message(jcr);
1439 Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
1440 return false; /* wait */
1446 * Returns: 1 if drive can be reserved
1447 * 0 if we should wait
1448 * -1 on error or impossibility
1450 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1452 DEVICE *dev = dcr->dev;
1453 JCR *jcr = dcr->jcr;
1455 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1456 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1457 rctx.autochanger_only, rctx.any_drive);
1459 /* Check for max jobs on this Volume */
1460 if (!is_max_jobs_ok(dcr)) {
1464 /* setting any_drive overrides PreferMountedVols flag */
1465 if (!rctx.any_drive) {
1467 * When PreferMountedVols is set, we keep track of the
1468 * drive in use that has the least number of writers, then if
1469 * no unmounted drive is found, we try that drive. This
1470 * helps spread the load to the least used drives.
1472 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1473 Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
1474 dev->print_name(), rctx.low_use_drive->print_name());
1477 /* If he wants a free drive, but this one is busy, no go */
1478 if (!rctx.PreferMountedVols && dev->is_busy()) {
1479 /* Save least used drive */
1480 if ((dev->num_writers + dev->num_reserved()) < rctx.num_writers) {
1481 rctx.num_writers = dev->num_writers + dev->num_reserved();
1482 rctx.low_use_drive = dev;
1483 Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
1484 dev->print_name(), rctx.num_writers);
1486 Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->num_reserved());
1488 Dmsg0(dbglvl, "failed: !prefMnt && busy.\n");
1489 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1490 jcr->JobId, dev->print_name());
1491 queue_reserve_message(jcr);
1495 /* Check for prefer mounted volumes */
1496 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1497 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1498 jcr->JobId, dev->print_name());
1499 queue_reserve_message(jcr);
1500 Dmsg0(dbglvl, "failed: want mounted -- no vol\n");
1501 return 0; /* No volume mounted */
1504 /* Check for exact Volume name match */
1505 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1508 if (rctx.exact_match && rctx.have_volume) {
1510 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1511 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1512 rctx.autochanger_only, rctx.any_drive);
1513 Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
1514 rctx.have_volume, dev->VolHdr.VolumeName,
1515 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1516 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1517 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1519 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1520 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1522 queue_reserve_message(jcr);
1523 Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
1524 dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1527 if (!dcr->can_i_use_volume()) {
1528 return 0; /* fail if volume on another drive */
1533 /* Check for unused autochanger drive */
1534 if (rctx.autochanger_only && !dev->is_busy() &&
1535 dev->VolHdr.VolumeName[0] == 0) {
1536 /* Device is available but not yet reserved, reserve it for us */
1537 Dmsg1(dbglvl, "OK Res Unused autochanger %s.\n", dev->print_name());
1538 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1539 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1540 return 1; /* reserve drive */
1544 * Handle the case that there are no writers
1546 if (dev->num_writers == 0) {
1547 /* Now check if there are any reservations on the drive */
1548 if (dev->num_reserved()) {
1549 return is_pool_ok(dcr);
1550 } else if (dev->can_append()) {
1551 if (is_pool_ok(dcr)) {
1554 /* Changing pool, unload old tape if any in drive */
1555 Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
1556 /* ***FIXME*** use set_unload() */
1557 unload_autochanger(dcr, -1);
1560 /* Device is available but not yet reserved, reserve it for us */
1561 Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
1562 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1563 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1564 return 1; /* reserve drive */
1568 * Check if the device is in append mode with writers (i.e.
1569 * available if pool is the same).
1571 if (dev->can_append() || dev->num_writers > 0) {
1572 return is_pool_ok(dcr);
1574 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1575 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1576 jcr->JobId, dev->print_name());
1577 queue_reserve_message(jcr);
1578 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1579 return -1; /* error, should not get here */
1581 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1582 jcr->JobId, dev->print_name());
1583 queue_reserve_message(jcr);
1584 Dmsg1(dbglvl, "failed: No reserve %s\n", dev->print_name());
1592 * Queue a reservation error or failure message for this jcr
1594 static void queue_reserve_message(JCR *jcr)
1602 msgs = jcr->reserve_msgs;
1607 * Look for duplicate message. If found, do
1610 for (i=msgs->size()-1; i >= 0; i--) {
1611 msg = (char *)msgs->get(i);
1615 /* Comparison based on 4 digit message number */
1616 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1620 /* Message unique, so insert it */
1621 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1628 * Send any reservation messages queued for this jcr
1630 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1637 msgs = jcr->reserve_msgs;
1638 if (!msgs || msgs->size() == 0) {
1641 for (i=msgs->size()-1; i >= 0; i--) {
1642 msg = (char *)msgs->get(i);
1644 sendit(" ", 3, arg);
1645 sendit(msg, strlen(msg), arg);
1656 * Pop and release any reservations messages
1658 static void pop_reserve_messages(JCR *jcr)
1664 msgs = jcr->reserve_msgs;
1668 while ((msg = (char *)msgs->pop())) {
1676 * Also called from acquire.c
1678 void release_reserve_messages(JCR *jcr)
1680 pop_reserve_messages(jcr);
1682 if (!jcr->reserve_msgs) {
1685 delete jcr->reserve_msgs;
1686 jcr->reserve_msgs = NULL;