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());
195 * List Volumes -- this should be moved to status.c
197 void list_volumes(void sendit(const char *msg, int len, void *sarg), void *arg)
200 POOL_MEM msg(PM_MESSAGE);
204 foreach_dlist(vol, vol_list) {
205 DEVICE *dev = vol->dev;
207 len = Mmsg(msg, "%s on device %s\n", vol->vol_name, dev->print_name());
208 sendit(msg.c_str(), len, arg);
209 len = Mmsg(msg, " Reader=%d writers=%d devres=%d volinuse=%d\n",
210 dev->can_read()?1:0, dev->num_writers, dev->num_reserved(),
212 sendit(msg.c_str(), len, arg);
214 len = Mmsg(msg, "%s no device. volinuse= %d\n", vol->vol_name,
216 sendit(msg.c_str(), len, arg);
223 * Create a Volume item to put in the Volume list
224 * Ensure that the device points to it.
226 static VOLRES *new_vol_item(DCR *dcr, const char *VolumeName)
229 vol = (VOLRES *)malloc(sizeof(VOLRES));
230 memset(vol, 0, sizeof(VOLRES));
231 vol->vol_name = bstrdup(VolumeName);
233 Dmsg3(dbglvl, "new Vol=%s at %p dev=%s\n",
234 VolumeName, vol->vol_name, vol->dev->print_name());
238 static void free_vol_item(VOLRES *vol)
253 * Put a new Volume entry in the Volume list. This
254 * effectively reserves the volume so that it will
255 * not be mounted again.
257 * If the device has any current volume associated with it,
258 * and it is a different Volume, and the device is not busy,
259 * we release the old Volume item and insert the new one.
261 * It is assumed that the device is free and locked so that
262 * we can change the device structure.
264 * Some details of the Volume list handling:
266 * 1. The Volume list entry must be attached to the drive (rather than
267 * attached to a job as it currently is. I.e. the drive that "owns"
268 * the volume (in use, mounted)
269 * must point to the volume (still to be maintained in a list).
271 * 2. The Volume is entered in the list when a drive is reserved.
273 * 3. When a drive is in use, the device code must appropriately update the
274 * volume name as it changes (currently the list is static -- an entry is
275 * removed when the Volume is no longer reserved, in use or mounted).
276 * The new code must keep the same list entry as long as the drive
277 * has any volume associated with it but the volume name in the list
278 * must be updated when the drive has a different volume mounted.
280 * 4. A job that has reserved a volume, can un-reserve the volume, and if the
281 * volume is not mounted, and not reserved, and not in use, it will be
282 * removed from the list.
284 * 5. If a job wants to reserve a drive with a different Volume from the one on
285 * the drive, it can re-use the drive for the new Volume.
287 * 6. If a job wants a Volume that is in a different drive, it can either use the
288 * other drive or take the volume, only if the other drive is not in use or
291 * One nice aspect of this is that the reserve use count and the writer use count
292 * already exist and are correctly programmed and will need no changes -- use
293 * counts are always very tricky.
295 * The old code had a concept of "reserving" a Volume, but was changed
296 * to reserving and using a drive. A volume is must be attached to (owned by) a
297 * drive and can move from drive to drive or be unused given certain specific
298 * conditions of the drive. The key is that the drive must "own" the Volume.
299 * The old code had the job (dcr) owning the volume (more or less). The job was
300 * to change the insertion and removal of the volumes from the list to be based
301 * on the drive rather than the job.
303 * Return: VOLRES entry on success
304 * NULL volume busy on another drive
306 VOLRES *reserve_volume(DCR *dcr, const char *VolumeName)
309 DEVICE * volatile dev = dcr->dev;
313 Dmsg2(dbglvl, "enter reserve_volume=%s drive=%s\n", VolumeName,
314 dcr->dev->print_name());
316 * We lock the reservations system here to ensure
317 * when adding a new volume that no newly scheduled
318 * job can reserve it.
321 debug_list_volumes("begin reserve_volume");
323 * First, remove any old volume attached to this device as it
328 Dmsg4(dbglvl, "Vol attached=%s, newvol=%s volinuse=%d on %s\n",
329 vol->vol_name, VolumeName, vol->is_in_use(), dev->print_name());
331 * Make sure we don't remove the current volume we are inserting
332 * because it was probably inserted by another job, or it
333 * is not being used and is marked as not reserved.
335 if (strcmp(vol->vol_name, VolumeName) == 0) {
336 Dmsg2(dbglvl, "=== set reserved vol=%s dev=%s\n", VolumeName,
337 vol->dev->print_name());
338 goto get_out; /* Volume already on this device */
340 /* Don't release a volume if it was reserved by someone other than us */
341 if (vol->is_in_use() && !dcr->reserved_volume) {
342 Dmsg1(dbglvl, "Cannot free vol=%s. It is reserved.\n", vol->vol_name);
343 vol = NULL; /* vol in use */
346 Dmsg2(dbglvl, "reserve_vol free vol=%s at %p\n", vol->vol_name, vol->vol_name);
348 Dmsg0(50, "set_unload\n");
349 dev->set_unload(); /* have to unload current volume */
350 debug_list_volumes("reserve_vol free");
354 /* Create a new Volume entry */
355 nvol = new_vol_item(dcr, VolumeName);
358 * Now try to insert the new Volume
360 vol = (VOLRES *)vol_list->binary_insert(nvol, my_compare);
362 Dmsg2(dbglvl, "Found vol=%s dev-same=%d\n", vol->vol_name, dev==vol->dev);
364 * At this point, a Volume with this name already is in the list,
365 * so we simply release our new Volume entry. Note, this should
366 * only happen if we are moving the volume from one drive to another.
368 Dmsg2(dbglvl, "reserve_vol free-tmp vol=%s at %p\n",
369 vol->vol_name, vol->vol_name);
371 * Clear dev pointer so that free_vol_item() doesn't
372 * take away our volume.
374 nvol->dev = NULL; /* don't zap dev entry */
378 * Check if we are trying to use the Volume on a different drive
380 * vol->dev is where the Volume we want is
382 if (dev != vol->dev) {
383 /* Caller wants to switch Volume to another device */
384 if (!vol->dev->is_busy() && !vol->is_swapping()) {
386 Dmsg3(dbglvl, "==== Swap vol=%s from dev=%s to %s\n",
387 VolumeName, vol->dev->print_name(), dev->print_name());
388 free_volume(dev); /* free any volume attached to our drive */
389 Dmsg0(50, "set_unload\n");
390 dev->set_unload(); /* Unload any volume that is on our drive */
391 dcr->dev = vol->dev; /* temp point to other dev */
392 slot = get_autochanger_loaded_slot(dcr); /* get slot on other drive */
393 dcr->dev = dev; /* restore dev */
394 vol->set_slot(slot); /* save slot */
395 vol->dev->set_unload(); /* unload the other drive */
396 vol->set_swapping(); /* swap from other drive */
397 dev->swap_dev = vol->dev; /* remember to get this vol */
398 dev->set_load(); /* then reload on our drive */
399 vol->dev->vol = NULL; /* remove volume from other drive */
400 vol->dev = dev; /* point the Volume at our drive */
401 dev->vol = vol; /* point our drive at the Volume */
403 Dmsg3(dbglvl, "==== Swap not possible Vol busy vol=%s from dev=%s to %s\n",
404 VolumeName, vol->dev->print_name(), dev->print_name());
405 vol = NULL; /* device busy */
412 dev->vol = vol; /* point to newly inserted volume */
417 Dmsg2(dbglvl, "=== set in_use. vol=%s dev=%s\n", vol->vol_name,
418 vol->dev->print_name());
420 dcr->reserved_volume = true;
421 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
423 debug_list_volumes("end new volume");
429 * Switch from current device to given device
433 void switch_device(DCR *dcr, DEVICE *dev)
438 memcpy(&save_dcr, dcr, sizeof(save_dcr));
439 clean_device(dcr); /* clean up the dcr */
441 dcr->dev = dev; /* get new device pointer */
442 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
443 dcr->dev->print_name());
445 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
446 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
447 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
448 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
449 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
450 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
452 // dcr->set_reserved();
459 * Search for a Volume name in the Volume list.
461 * Returns: VOLRES entry on success
462 * NULL if the Volume is not in the list
464 VOLRES *find_volume(const char *VolumeName)
467 /* Do not lock reservations here */
469 vol.vol_name = bstrdup(VolumeName);
470 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
472 Dmsg2(dbglvl, "find_vol=%s found=%d\n", VolumeName, fvol!=NULL);
473 debug_list_volumes("find_volume");
478 void DCR::set_reserved()
481 Dmsg2(dbglvl, "Inc reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
485 void DCR::clear_reserved()
490 Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
495 * Remove any reservation from a drive and tell the system
496 * that the volume is unused at least by us.
498 void DCR::unreserve_device()
503 reserved_volume = false;
504 /* If we set read mode in reserving, remove it */
505 if (dev->can_read()) {
508 if (dev->num_writers < 0) {
509 Jmsg1(jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
510 dev->num_writers = 0;
512 if (dev->num_reserved() == 0 && dev->num_writers == 0) {
520 * Free a Volume from the Volume list if it is no longer used
521 * Note, for tape drives we want to remember where the Volume
522 * was when last used, so rather than free the volume entry,
523 * we simply mark it "not reserved" so when the drive is really
524 * needed for another volume, we can reuse it.
526 * Returns: true if the Volume found and "removed" from the list
527 * false if the Volume is not in the list or is in use
529 bool volume_unused(DCR *dcr)
531 DEVICE *dev = dcr->dev;
534 Dmsg1(dbglvl, "vol_unused: no vol on %s\n", dev->print_name());
535 debug_list_volumes("null vol cannot unreserve_volume");
538 if (dev->vol->is_swapping()) {
539 Dmsg1(dbglvl, "vol_unused: vol being swapped on %s\n", dev->print_name());
540 Dmsg1(dbglvl, "=== clear in_use vol=%s\n", dev->vol->vol_name);
541 dev->vol->clear_in_use();
542 debug_list_volumes("swapping vol cannot free_volume");
547 * If this is a tape, we do not free the volume, rather we wait
548 * until the autoloader unloads it, or until another tape is
549 * explicitly read in this drive. This allows the SD to remember
550 * where the tapes are or last were.
552 Dmsg4(dbglvl, "=== set not reserved vol=%s num_writers=%d dev_reserved=%d dev=%s\n",
553 dev->vol->vol_name, dev->num_writers, dev->num_reserved(), dev->print_name());
554 Dmsg1(dbglvl, "=== clear in_use vol=%s\n", dev->vol->vol_name);
555 dev->vol->clear_in_use();
556 if (dev->is_tape() || dev->is_autochanger()) {
560 * Note, this frees the volume reservation entry, but the
561 * file descriptor remains open with the OS.
563 return free_volume(dev);
568 * Unconditionally release the volume entry
570 bool free_volume(DEVICE *dev)
574 if (dev->vol == NULL) {
575 Dmsg1(dbglvl, "No vol on dev %s\n", dev->print_name());
580 /* Don't free a volume while it is being swapped */
581 if (!vol->is_swapping()) {
582 Dmsg1(dbglvl, "=== clear in_use vol=%s\n", dev->vol->vol_name);
584 vol_list->remove(vol);
585 Dmsg2(dbglvl, "=== remove volume %s dev=%s\n", vol->vol_name, dev->print_name());
587 debug_list_volumes("free_volume");
594 /* Create the Volume list */
595 void create_volume_list()
598 if (vol_list == NULL) {
599 vol_list = New(dlist(vol, &vol->link));
603 /* Release all Volumes from the list */
604 void free_volume_list()
611 foreach_dlist(vol, vol_list) {
613 Dmsg2(dbglvl, "free vol_list Volume=%s dev=%s\n", vol->vol_name, vol->dev->print_name());
615 Dmsg1(dbglvl, "free vol_list Volume=%s No dev\n", vol->vol_name);
618 vol->vol_name = NULL;
625 bool DCR::can_i_use_volume()
631 vol = find_volume(VolumeName);
633 Dmsg1(dbglvl, "Vol=%s not in use.\n", VolumeName);
634 goto get_out; /* vol not in list */
636 ASSERT(vol->dev != NULL);
638 if (dev == vol->dev) { /* same device OK */
639 Dmsg1(dbglvl, "Vol=%s on same dev.\n", VolumeName);
642 Dmsg3(dbglvl, "Vol=%s on %s we have %s\n", VolumeName,
643 vol->dev->print_name(), dev->print_name());
645 /* ***FIXME*** check this ... */
646 if (!vol->dev->is_busy()) {
647 Dmsg2(dbglvl, "Vol=%s dev=%s not busy.\n", VolumeName, vol->dev->print_name());
650 Dmsg2(dbglvl, "Vol=%s dev=%s busy.\n", VolumeName, vol->dev->print_name());
652 Dmsg2(dbglvl, "Vol=%s in use by %s.\n", VolumeName, vol->dev->print_name());
663 * We get the following type of information:
665 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
669 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
673 static bool use_storage_cmd(JCR *jcr)
675 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
676 BSOCK *dir = jcr->dir_bsock;
684 memset(&rctx, 0, sizeof(RCTX));
687 * If there are multiple devices, the director sends us
688 * use_device for each device that it wants to use.
690 dirstore = New(alist(10, not_owned_by_alist));
691 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
693 Dmsg1(dbglvl, "<dird: %s", dir->msg);
694 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
695 media_type.c_str(), pool_name.c_str(),
696 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
701 jcr->write_store = dirstore;
703 jcr->read_store = dirstore;
705 rctx.append = append;
706 unbash_spaces(store_name);
707 unbash_spaces(media_type);
708 unbash_spaces(pool_name);
709 unbash_spaces(pool_type);
710 store = new DIRSTORE;
711 dirstore->append(store);
712 memset(store, 0, sizeof(DIRSTORE));
713 store->device = New(alist(10));
714 bstrncpy(store->name, store_name, sizeof(store->name));
715 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
716 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
717 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
718 store->append = append;
720 /* Now get all devices */
721 while (dir->recv() >= 0) {
722 Dmsg1(dbglvl, "<dird device: %s", dir->msg);
723 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
727 unbash_spaces(dev_name);
728 store->device->append(bstrdup(dev_name.c_str()));
730 } while (ok && dir->recv() >= 0);
732 /* Developer debug code */
734 if (debug_level >= dbglvl) {
735 foreach_alist(store, dirstore) {
736 Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
737 store->name, store->media_type, store->pool_name,
738 store->pool_type, store->append);
739 foreach_alist(device_name, store->device) {
740 Dmsg1(dbglvl, " Device=%s\n", device_name);
745 init_jcr_device_wait_timers(jcr);
746 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
748 BSOCK *dir = jcr->dir_bsock;
749 dir->fsend(_("3939 Could not get dcr\n"));
750 Dmsg1(dbglvl, ">dird: %s", dir->msg);
754 * At this point, we have a list of all the Director's Storage
755 * resources indicated for this Job, which include Pool, PoolType,
756 * storage name, and Media type.
757 * Then for each of the Storage resources, we have a list of
758 * device names that were given.
760 * Wiffle through them and find one that can do the backup.
763 int wait_for_device_retries = 0;
766 rctx.notify_dir = true;
769 for ( ; !fail && !job_canceled(jcr); ) {
770 pop_reserve_messages(jcr);
771 rctx.suitable_device = false;
772 rctx.have_volume = false;
773 rctx.VolumeName[0] = 0;
774 rctx.any_drive = false;
775 if (!jcr->PreferMountedVols) {
777 * Here we try to find a drive that is not used.
778 * This will maximize the use of available drives.
781 rctx.num_writers = 20000000; /* start with impossible number */
782 rctx.low_use_drive = NULL;
783 rctx.PreferMountedVols = false;
784 rctx.exact_match = false;
785 rctx.autochanger_only = true;
786 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
789 /* Look through all drives possibly for low_use drive */
790 if (rctx.low_use_drive) {
791 rctx.try_low_use_drive = true;
792 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
795 rctx.try_low_use_drive = false;
797 rctx.autochanger_only = false;
798 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
803 * Now we look for a drive that may or may not be in
806 /* Look for an exact Volume match all drives */
807 rctx.PreferMountedVols = true;
808 rctx.exact_match = true;
809 rctx.autochanger_only = false;
810 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
813 /* Look for any mounted drive */
814 rctx.exact_match = false;
815 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
819 rctx.any_drive = true;
820 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
823 /* Keep reservations locked *except* during wait_for_device() */
824 unlock_reservations();
826 * The idea of looping on repeat a few times it to ensure
827 * that if there is some subtle timing problem between two
828 * jobs, we will simply try again, and most likely succeed.
829 * This can happen if one job reserves a drive or finishes using
830 * a drive at the same time a second job wants it.
832 if (repeat++ > 1) { /* try algorithm 3 times */
833 bmicrosleep(30, 0); /* wait a bit */
834 Dmsg0(dbglvl, "repeat reserve algorithm\n");
835 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
836 Dmsg0(dbglvl, "Fail. !suitable_device || !wait_for_device\n");
840 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
842 unlock_reservations();
845 * If we get here, there are no suitable devices available, which
846 * means nothing configured. If a device is suitable but busy
847 * with another Volume, we will not come here.
849 unbash_spaces(dir->msg);
850 pm_strcpy(jcr->errmsg, dir->msg);
851 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
852 Jmsg(jcr, M_FATAL, 0, _("\n"
853 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
854 dev_name.c_str(), media_type.c_str());
855 dir->fsend(NO_device, dev_name.c_str());
857 Dmsg1(dbglvl, ">dird: %s", dir->msg);
860 unbash_spaces(dir->msg);
861 pm_strcpy(jcr->errmsg, dir->msg);
862 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
863 dir->fsend(BAD_use, jcr->errmsg);
864 Dmsg1(dbglvl, ">dird: %s", dir->msg);
867 release_reserve_messages(jcr);
873 * Walk through the autochanger resources and check if
874 * the volume is in one of them.
876 * Returns: true if volume is in device
879 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
881 AUTOCHANGER *changer = vol->dev->device->changer_res;
883 /* Find resource, and make sure we were able to open it */
884 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
885 Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
888 Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
893 * Search for a device suitable for this job.
894 * Note, this routine sets sets rctx.suitable_device if any
895 * device exists within the SD. The device may not be actually
897 * It also returns if it finds a useable device.
899 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
908 dirstore = jcr->write_store;
910 dirstore = jcr->read_store;
912 Dmsg5(dbglvl, "Start find_suit_dev PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
913 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
914 rctx.autochanger_only, rctx.any_drive);
917 * If the appropriate conditions of this if are met, namely that
918 * we are appending and the user wants mounted drive (or we
919 * force try a mounted drive because they are all busy), we
920 * start by looking at all the Volumes in the volume list.
922 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
923 dlist *temp_vol_list, *save_vol_list;
926 Dmsg0(dbglvl, "lock volumes\n");
929 * Create a temporary copy of the volume list. We do this,
930 * to avoid having the volume list locked during the
931 * call to reserve_device(), which would cause a deadlock.
932 * Note, we may want to add an update counter on the vol_list
933 * so that if it is modified while we are traversing the copy
934 * we can take note and act accordingly (probably redo the
935 * search at least a few times).
937 Dmsg0(dbglvl, "duplicate vol list\n");
938 temp_vol_list = New(dlist(vol, &vol->link));
939 foreach_dlist(vol, vol_list) {
941 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
942 memset(tvol, 0, sizeof(VOLRES));
943 tvol->vol_name = bstrdup(vol->vol_name);
944 tvol->dev = vol->dev;
945 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
947 tvol->dev = NULL; /* don't zap dev entry */
949 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
950 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
953 Dmsg0(dbglvl, "unlock volumes\n");
956 /* Look through reserved volumes for one we can use */
957 Dmsg0(dbglvl, "look for vol in vol list\n");
958 foreach_dlist(vol, temp_vol_list) {
960 Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
963 /* Check with Director if this Volume is OK */
964 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
965 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
969 Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
970 foreach_alist(store, dirstore) {
973 foreach_alist(device_name, store->device) {
974 /* Found a device, try to use it */
975 rctx.device_name = device_name;
976 rctx.device = vol->dev->device;
978 if (vol->dev->is_autochanger()) {
979 Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
980 if (!is_vol_in_autochanger(rctx, vol)) {
983 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
984 Dmsg2(dbglvl, "device=%s not suitable want %s\n",
985 vol->dev->device->hdr.name, device_name);
989 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
990 rctx.have_volume = true;
991 /* Try reserving this device and volume */
992 Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
993 stat = reserve_device(rctx);
994 if (stat == 1) { /* found available device */
995 Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
998 } else if (stat == 0) { /* device busy */
999 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
1001 /* otherwise error */
1002 Dmsg0(dbglvl, "No suitable device found.\n");
1004 rctx.have_volume = false;
1005 rctx.VolumeName[0] = 0;
1014 } /* end for loop over reserved volumes */
1016 Dmsg0(dbglvl, "lock volumes\n");
1018 save_vol_list = vol_list;
1019 vol_list = temp_vol_list;
1020 free_volume_list(); /* release temp_vol_list */
1021 vol_list = save_vol_list;
1022 Dmsg0(dbglvl, "deleted temp vol list\n");
1023 Dmsg0(dbglvl, "unlock volumes\n");
1025 debug_list_volumes("after free temp table");
1028 Dmsg1(dbglvl, "OK dev found. Vol=%s from in-use vols list\n", rctx.VolumeName);
1033 * No reserved volume we can use, so now search for an available device.
1035 * For each storage device that the user specified, we
1036 * search and see if there is a resource for that device.
1038 foreach_alist(store, dirstore) {
1040 foreach_alist(device_name, store->device) {
1042 rctx.device_name = device_name;
1043 stat = search_res_for_device(rctx);
1044 if (stat == 1) { /* found available device */
1045 Dmsg1(dbglvl, "available device found=%s\n", device_name);
1048 } else if (stat == 0) { /* device busy */
1049 Dmsg1(dbglvl, "No usable device=%s, busy: not use\n", device_name);
1051 /* otherwise error */
1052 Dmsg0(dbglvl, "No usable device found.\n");
1060 Dmsg1(dbglvl, "OK dev found. Vol=%s\n", rctx.VolumeName);
1062 Dmsg0(dbglvl, "Leave find_suit_dev: no dev found.\n");
1068 * Search for a particular storage device with particular storage
1069 * characteristics (MediaType).
1071 int search_res_for_device(RCTX &rctx)
1073 AUTOCHANGER *changer;
1076 Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
1077 /* Look through Autochangers first */
1078 foreach_res(changer, R_AUTOCHANGER) {
1079 Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
1080 /* Find resource, and make sure we were able to open it */
1081 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1082 /* Try each device in this AutoChanger */
1083 foreach_alist(rctx.device, changer->device) {
1084 Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
1085 if (!rctx.device->autoselect) {
1086 Dmsg1(100, "Device %s not autoselect skipped.\n",
1087 rctx.device->hdr.name);
1088 continue; /* device is not available */
1090 stat = reserve_device(rctx);
1091 if (stat != 1) { /* try another device */
1095 if (rctx.store->append == SD_APPEND) {
1096 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1097 rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
1099 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1100 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
1107 /* Now if requested look through regular devices */
1108 if (!rctx.autochanger_only) {
1109 foreach_res(rctx.device, R_DEVICE) {
1110 Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
1111 /* Find resource, and make sure we were able to open it */
1112 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1113 stat = reserve_device(rctx);
1114 if (stat != 1) { /* try another device */
1118 if (rctx.store->append == SD_APPEND) {
1119 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1120 rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
1122 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1123 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
1129 return -1; /* nothing found */
1133 * Try to reserve a specific device.
1135 * Returns: 1 -- OK, have DCR
1139 static int reserve_device(RCTX &rctx)
1143 const int name_len = MAX_NAME_LENGTH;
1145 /* Make sure MediaType is OK */
1146 Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
1147 rctx.device->media_type, rctx.store->media_type);
1148 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1152 /* Make sure device exists -- i.e. we can stat() it */
1153 if (!rctx.device->dev) {
1154 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1156 if (!rctx.device->dev) {
1157 if (rctx.device->changer_res) {
1158 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1159 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1160 rctx.device->hdr.name, rctx.device_name);
1162 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1163 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1166 return -1; /* no use waiting */
1169 rctx.suitable_device = true;
1170 Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
1171 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1173 BSOCK *dir = rctx.jcr->dir_bsock;
1174 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1175 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1178 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1179 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1180 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1181 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1182 if (rctx.store->append == SD_APPEND) {
1183 Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
1184 ok = reserve_device_for_append(dcr, rctx);
1189 rctx.jcr->dcr = dcr;
1190 Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1191 dcr->dev->num_reserved(),
1192 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1193 Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
1194 rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
1195 if (rctx.have_volume) {
1196 Dmsg0(dbglvl, "Call reserve_volume\n");
1197 if (reserve_volume(dcr, rctx.VolumeName)) {
1198 Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
1200 Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
1204 dcr->any_volume = true;
1205 Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
1206 if (dir_find_next_appendable_volume(dcr)) {
1207 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1208 rctx.have_volume = true;
1209 Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
1211 Dmsg0(dbglvl, "No next volume found\n");
1212 rctx.have_volume = false;
1213 rctx.VolumeName[0] = 0;
1215 * If there is at least one volume that is valid and in use,
1216 * but we get here, check if we are running with prefers
1217 * non-mounted drives. In that case, we have selected a
1218 * non-used drive and our one and only volume is mounted
1219 * elsewhere, so we bail out and retry using that drive.
1221 if (dcr->found_in_use() && !rctx.PreferMountedVols) {
1222 rctx.PreferMountedVols = true;
1223 if (dcr->VolumeName[0]) {
1224 dcr->unreserve_device();
1229 * Note. Under some circumstances, the Director can hand us
1230 * a Volume name that is not the same as the one on the current
1231 * drive, and in that case, the call above to find the next
1232 * volume will fail because in attempting to reserve the Volume
1233 * the code will realize that we already have a tape mounted,
1234 * and it will fail. This *should* only happen if there are
1235 * writers, thus the following test. In that case, we simply
1236 * bail out, and continue waiting, rather than plunging on
1237 * and hoping that the operator can resolve the problem.
1239 if (dcr->dev->num_writers != 0) {
1240 if (dcr->VolumeName[0]) {
1241 dcr->unreserve_device();
1248 ok = reserve_device_for_read(dcr);
1250 rctx.jcr->read_dcr = dcr;
1251 Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1252 dcr->dev->num_reserved(),
1253 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1260 if (rctx.notify_dir) {
1262 BSOCK *dir = rctx.jcr->dir_bsock;
1263 pm_strcpy(dev_name, rctx.device->hdr.name);
1264 bash_spaces(dev_name);
1265 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1266 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1273 rctx.have_volume = false;
1274 rctx.VolumeName[0] = 0;
1275 Dmsg0(dbglvl, "Not OK.\n");
1280 * We "reserve" the drive by setting the ST_READ bit. No one else
1281 * should touch the drive until that is cleared.
1282 * This allows the DIR to "reserve" the device before actually
1285 static bool reserve_device_for_read(DCR *dcr)
1287 DEVICE *dev = dcr->dev;
1288 JCR *jcr = dcr->jcr;
1295 if (is_device_unmounted(dev)) {
1296 Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
1297 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1298 jcr->JobId, dev->print_name());
1299 queue_reserve_message(jcr);
1303 if (dev->is_busy()) {
1304 Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1306 dev->state & ST_READ?1:0, dev->num_writers, dev->num_reserved());
1307 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1308 jcr->JobId, dev->print_name());
1309 queue_reserve_message(jcr);
1313 dev->clear_append();
1316 dcr->set_reserved();
1325 * We reserve the device for appending by incrementing
1326 * num_reserved(). We do virtually all the same work that
1327 * is done in acquire_device_for_append(), but we do
1328 * not attempt to mount the device. This routine allows
1329 * the DIR to reserve multiple devices before *really*
1330 * starting the job. It also permits the SD to refuse
1331 * certain devices (not up, ...).
1333 * Note, in reserving a device, if the device is for the
1334 * same pool and the same pool type, then it is acceptable.
1335 * The Media Type has already been checked. If we are
1336 * the first tor reserve the device, we put the pool
1337 * name and pool type in the device record.
1339 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1341 JCR *jcr = dcr->jcr;
1342 DEVICE *dev = dcr->dev;
1349 /* If device is being read, we cannot write it */
1350 if (dev->can_read()) {
1351 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1352 jcr->JobId, dev->print_name());
1353 Dmsg1(dbglvl, "%s", jcr->errmsg);
1354 queue_reserve_message(jcr);
1358 /* If device is unmounted, we are out of luck */
1359 if (is_device_unmounted(dev)) {
1360 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1361 jcr->JobId, dev->print_name());
1362 Dmsg1(dbglvl, "%s", jcr->errmsg);
1363 queue_reserve_message(jcr);
1367 Dmsg1(dbglvl, "reserve_append device is %s\n", dev->print_name());
1369 /* Now do detailed tests ... */
1370 if (can_reserve_drive(dcr, rctx) != 1) {
1371 Dmsg0(dbglvl, "can_reserve_drive!=1\n");
1375 dcr->set_reserved();
1383 static int is_pool_ok(DCR *dcr)
1385 DEVICE *dev = dcr->dev;
1386 JCR *jcr = dcr->jcr;
1388 /* Now check if we want the same Pool and pool type */
1389 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1390 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1391 /* OK, compatible device */
1392 Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
1395 /* Drive Pool not suitable for us */
1396 Mmsg(jcr->errmsg, _(
1397 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1398 (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
1399 dev->num_reserved(), dev->print_name());
1400 queue_reserve_message(jcr);
1401 Dmsg2(dbglvl, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1402 dev->pool_name, dcr->pool_name);
1407 static bool is_max_jobs_ok(DCR *dcr)
1409 DEVICE *dev = dcr->dev;
1410 JCR *jcr = dcr->jcr;
1412 Dmsg5(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Status=%s Vol=%s\n",
1413 dcr->VolCatInfo.VolCatMaxJobs,
1414 dcr->VolCatInfo.VolCatJobs, dev->num_reserved(),
1415 dcr->VolCatInfo.VolCatStatus,
1417 if (strcmp(dcr->VolCatInfo.VolCatStatus, "Recycle") == 0) {
1420 if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
1421 (dcr->VolCatInfo.VolCatJobs + dev->num_reserved())) {
1422 /* Max Job Vols depassed or already reserved */
1423 Mmsg(jcr->errmsg, _("3610 JobId=%u Volume max jobs exceeded on drive %s.\n"),
1424 (uint32_t)jcr->JobId, dev->print_name());
1425 queue_reserve_message(jcr);
1426 Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
1427 return false; /* wait */
1433 * Returns: 1 if drive can be reserved
1434 * 0 if we should wait
1435 * -1 on error or impossibility
1437 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1439 DEVICE *dev = dcr->dev;
1440 JCR *jcr = dcr->jcr;
1442 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1443 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1444 rctx.autochanger_only, rctx.any_drive);
1446 /* Check for max jobs on this Volume */
1447 if (!is_max_jobs_ok(dcr)) {
1451 /* setting any_drive overrides PreferMountedVols flag */
1452 if (!rctx.any_drive) {
1454 * When PreferMountedVols is set, we keep track of the
1455 * drive in use that has the least number of writers, then if
1456 * no unmounted drive is found, we try that drive. This
1457 * helps spread the load to the least used drives.
1459 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1460 Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
1461 dev->print_name(), rctx.low_use_drive->print_name());
1464 /* If he wants a free drive, but this one is busy, no go */
1465 if (!rctx.PreferMountedVols && dev->is_busy()) {
1466 /* Save least used drive */
1467 if ((dev->num_writers + dev->num_reserved()) < rctx.num_writers) {
1468 rctx.num_writers = dev->num_writers + dev->num_reserved();
1469 rctx.low_use_drive = dev;
1470 Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
1471 dev->print_name(), rctx.num_writers);
1473 Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->num_reserved());
1475 Dmsg0(dbglvl, "failed: !prefMnt && busy.\n");
1476 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1477 jcr->JobId, dev->print_name());
1478 queue_reserve_message(jcr);
1482 /* Check for prefer mounted volumes */
1483 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1484 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1485 jcr->JobId, dev->print_name());
1486 queue_reserve_message(jcr);
1487 Dmsg0(dbglvl, "failed: want mounted -- no vol\n");
1488 return 0; /* No volume mounted */
1491 /* Check for exact Volume name match */
1492 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1495 if (rctx.exact_match && rctx.have_volume) {
1497 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1498 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1499 rctx.autochanger_only, rctx.any_drive);
1500 Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
1501 rctx.have_volume, dev->VolHdr.VolumeName,
1502 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1503 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1504 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1506 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1507 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1509 queue_reserve_message(jcr);
1510 Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
1511 dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1514 if (!dcr->can_i_use_volume()) {
1515 return 0; /* fail if volume on another drive */
1520 /* Check for unused autochanger drive */
1521 if (rctx.autochanger_only && !dev->is_busy() &&
1522 dev->VolHdr.VolumeName[0] == 0) {
1523 /* Device is available but not yet reserved, reserve it for us */
1524 Dmsg1(dbglvl, "OK Res Unused autochanger %s.\n", dev->print_name());
1525 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1526 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1527 return 1; /* reserve drive */
1531 * Handle the case that there are no writers
1533 if (dev->num_writers == 0) {
1534 /* Now check if there are any reservations on the drive */
1535 if (dev->num_reserved()) {
1536 return is_pool_ok(dcr);
1537 } else if (dev->can_append()) {
1538 if (is_pool_ok(dcr)) {
1541 /* Changing pool, unload old tape if any in drive */
1542 Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
1543 /* ***FIXME*** use set_unload() */
1544 unload_autochanger(dcr, -1);
1547 /* Device is available but not yet reserved, reserve it for us */
1548 Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
1549 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1550 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1551 return 1; /* reserve drive */
1555 * Check if the device is in append mode with writers (i.e.
1556 * available if pool is the same).
1558 if (dev->can_append() || dev->num_writers > 0) {
1559 return is_pool_ok(dcr);
1561 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1562 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1563 jcr->JobId, dev->print_name());
1564 queue_reserve_message(jcr);
1565 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1566 return -1; /* error, should not get here */
1568 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1569 jcr->JobId, dev->print_name());
1570 queue_reserve_message(jcr);
1571 Dmsg1(dbglvl, "failed: No reserve %s\n", dev->print_name());
1579 * Queue a reservation error or failure message for this jcr
1581 static void queue_reserve_message(JCR *jcr)
1589 msgs = jcr->reserve_msgs;
1594 * Look for duplicate message. If found, do
1597 for (i=msgs->size()-1; i >= 0; i--) {
1598 msg = (char *)msgs->get(i);
1602 /* Comparison based on 4 digit message number */
1603 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1607 /* Message unique, so insert it */
1608 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1615 * Send any reservation messages queued for this jcr
1617 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1624 msgs = jcr->reserve_msgs;
1625 if (!msgs || msgs->size() == 0) {
1628 for (i=msgs->size()-1; i >= 0; i--) {
1629 msg = (char *)msgs->get(i);
1631 sendit(" ", 3, arg);
1632 sendit(msg, strlen(msg), arg);
1643 * Pop and release any reservations messages
1645 static void pop_reserve_messages(JCR *jcr)
1651 msgs = jcr->reserve_msgs;
1655 while ((msg = (char *)msgs->pop())) {
1663 * Also called from acquire.c
1665 void release_reserve_messages(JCR *jcr)
1667 pop_reserve_messages(jcr);
1669 if (!jcr->reserve_msgs) {
1672 delete jcr->reserve_msgs;
1673 jcr->reserve_msgs = NULL;