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 vol->set_in_use(); /* retake vol if released previously */
339 dcr->reserved_volume = true; /* reserved volume */
340 goto get_out; /* Volume already on this device */
342 /* Don't release a volume if it was reserved by someone other than us */
343 if (vol->is_in_use() && !dcr->reserved_volume) {
344 Dmsg1(dbglvl, "Cannot free vol=%s. It is reserved.\n", vol->vol_name);
345 vol = NULL; /* vol in use */
348 Dmsg2(dbglvl, "reserve_vol free vol=%s at %p\n", vol->vol_name, vol->vol_name);
350 Dmsg0(50, "set_unload\n");
351 dev->set_unload(); /* have to unload current volume */
352 debug_list_volumes("reserve_vol free");
356 /* Create a new Volume entry */
357 nvol = new_vol_item(dcr, VolumeName);
360 * Now try to insert the new Volume
362 vol = (VOLRES *)vol_list->binary_insert(nvol, my_compare);
364 Dmsg2(dbglvl, "Found vol=%s dev-same=%d\n", vol->vol_name, dev==vol->dev);
366 * At this point, a Volume with this name already is in the list,
367 * so we simply release our new Volume entry. Note, this should
368 * only happen if we are moving the volume from one drive to another.
370 Dmsg2(dbglvl, "reserve_vol free-tmp vol=%s at %p\n",
371 vol->vol_name, vol->vol_name);
373 * Clear dev pointer so that free_vol_item() doesn't
374 * take away our volume.
376 nvol->dev = NULL; /* don't zap dev entry */
380 * Check if we are trying to use the Volume on a different drive
382 * vol->dev is where the Volume we want is
384 if (dev != vol->dev) {
385 /* Caller wants to switch Volume to another device */
386 if (!vol->dev->is_busy() && !vol->is_swapping()) {
388 Dmsg3(dbglvl, "==== Swap vol=%s from dev=%s to %s\n",
389 VolumeName, vol->dev->print_name(), dev->print_name());
390 free_volume(dev); /* free any volume attached to our drive */
391 Dmsg0(50, "set_unload\n");
392 dev->set_unload(); /* Unload any volume that is on our drive */
393 dcr->dev = vol->dev; /* temp point to other dev */
394 slot = get_autochanger_loaded_slot(dcr); /* get slot on other drive */
395 dcr->dev = dev; /* restore dev */
396 vol->set_slot(slot); /* save slot */
397 vol->dev->set_unload(); /* unload the other drive */
398 vol->set_swapping(); /* swap from other drive */
399 dev->swap_dev = vol->dev; /* remember to get this vol */
400 dev->set_load(); /* then reload on our drive */
401 vol->dev->vol = NULL; /* remove volume from other drive */
402 vol->dev = dev; /* point the Volume at our drive */
403 dev->vol = vol; /* point our drive at the Volume */
405 Dmsg3(dbglvl, "==== Swap not possible Vol busy vol=%s from dev=%s to %s\n",
406 VolumeName, vol->dev->print_name(), dev->print_name());
407 vol = NULL; /* device busy */
414 dev->vol = vol; /* point to newly inserted volume */
419 Dmsg2(dbglvl, "=== set in_use. vol=%s dev=%s\n", vol->vol_name,
420 vol->dev->print_name());
422 dcr->reserved_volume = true;
423 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
425 debug_list_volumes("end new volume");
431 * Switch from current device to given device
435 void switch_device(DCR *dcr, DEVICE *dev)
440 memcpy(&save_dcr, dcr, sizeof(save_dcr));
441 clean_device(dcr); /* clean up the dcr */
443 dcr->dev = dev; /* get new device pointer */
444 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
445 dcr->dev->print_name());
447 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
448 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
449 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
450 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
451 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
452 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
454 // dcr->set_reserved();
461 * Search for a Volume name in the Volume list.
463 * Returns: VOLRES entry on success
464 * NULL if the Volume is not in the list
466 VOLRES *find_volume(const char *VolumeName)
469 /* Do not lock reservations here */
471 vol.vol_name = bstrdup(VolumeName);
472 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
474 Dmsg2(dbglvl, "find_vol=%s found=%d\n", VolumeName, fvol!=NULL);
475 debug_list_volumes("find_volume");
480 void DCR::set_reserved()
483 Dmsg2(dbglvl, "Inc reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
487 void DCR::clear_reserved()
492 Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
497 * Remove any reservation from a drive and tell the system
498 * that the volume is unused at least by us.
500 void DCR::unreserve_device()
505 reserved_volume = false;
506 /* If we set read mode in reserving, remove it */
507 if (dev->can_read()) {
510 if (dev->num_writers < 0) {
511 Jmsg1(jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
512 dev->num_writers = 0;
514 if (dev->num_reserved() == 0 && dev->num_writers == 0) {
522 * Free a Volume from the Volume list if it is no longer used
523 * Note, for tape drives we want to remember where the Volume
524 * was when last used, so rather than free the volume entry,
525 * we simply mark it "not reserved" so when the drive is really
526 * needed for another volume, we can reuse it.
528 * Returns: true if the Volume found and "removed" from the list
529 * false if the Volume is not in the list or is in use
531 bool volume_unused(DCR *dcr)
533 DEVICE *dev = dcr->dev;
536 Dmsg1(dbglvl, "vol_unused: no vol on %s\n", dev->print_name());
537 debug_list_volumes("null vol cannot unreserve_volume");
540 if (dev->vol->is_swapping()) {
541 Dmsg1(dbglvl, "vol_unused: vol being swapped on %s\n", dev->print_name());
542 debug_list_volumes("swapping vol cannot unreserve_volume");
547 if (dev->is_busy()) {
548 Dmsg1(dbglvl, "vol_unused: busy on %s\n", dev->print_name());
549 debug_list_volumes("dev busy cannot unreserve_volume");
554 if (dev->num_writers > 0 || dev->num_reserved() > 0) {
560 * If this is a tape, we do not free the volume, rather we wait
561 * until the autoloader unloads it, or until another tape is
562 * explicitly read in this drive. This allows the SD to remember
563 * where the tapes are or last were.
565 Dmsg4(dbglvl, "=== set not reserved vol=%s num_writers=%d dev_reserved=%d dev=%s\n",
566 dev->vol->vol_name, dev->num_writers, dev->num_reserved(), dev->print_name());
567 dev->vol->clear_in_use();
568 if (dev->is_tape() || dev->is_autochanger()) {
572 * Note, this frees the volume reservation entry, but the
573 * file descriptor remains open with the OS.
575 return free_volume(dev);
580 * Unconditionally release the volume entry
582 bool free_volume(DEVICE *dev)
586 if (dev->vol == NULL) {
587 Dmsg1(dbglvl, "No vol on dev %s\n", dev->print_name());
592 /* Don't free a volume while it is being swapped */
593 if (!vol->is_swapping()) {
595 vol_list->remove(vol);
596 Dmsg2(dbglvl, "=== remove volume %s dev=%s\n", vol->vol_name, dev->print_name());
598 debug_list_volumes("free_volume");
605 /* Create the Volume list */
606 void create_volume_list()
609 if (vol_list == NULL) {
610 vol_list = New(dlist(vol, &vol->link));
614 /* Release all Volumes from the list */
615 void free_volume_list()
622 foreach_dlist(vol, vol_list) {
624 Dmsg2(dbglvl, "free vol_list Volume=%s dev=%s\n", vol->vol_name, vol->dev->print_name());
626 Dmsg1(dbglvl, "free vol_list Volume=%s No dev\n", vol->vol_name);
629 vol->vol_name = NULL;
636 bool DCR::can_i_use_volume()
642 vol = find_volume(VolumeName);
644 Dmsg1(dbglvl, "Vol=%s not in use.\n", VolumeName);
645 goto get_out; /* vol not in list */
647 ASSERT(vol->dev != NULL);
649 if (dev == vol->dev) { /* same device OK */
650 Dmsg1(dbglvl, "Vol=%s on same dev.\n", VolumeName);
653 Dmsg3(dbglvl, "Vol=%s on %s we have %s\n", VolumeName,
654 vol->dev->print_name(), dev->print_name());
656 /* ***FIXME*** check this ... */
657 if (!vol->dev->is_busy()) {
658 Dmsg2(dbglvl, "Vol=%s dev=%s not busy.\n", VolumeName, vol->dev->print_name());
661 Dmsg2(dbglvl, "Vol=%s dev=%s busy.\n", VolumeName, vol->dev->print_name());
663 Dmsg2(dbglvl, "Vol=%s in use by %s.\n", VolumeName, vol->dev->print_name());
674 * We get the following type of information:
676 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
680 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
684 static bool use_storage_cmd(JCR *jcr)
686 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
687 BSOCK *dir = jcr->dir_bsock;
695 memset(&rctx, 0, sizeof(RCTX));
698 * If there are multiple devices, the director sends us
699 * use_device for each device that it wants to use.
701 dirstore = New(alist(10, not_owned_by_alist));
702 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
704 Dmsg1(dbglvl, "<dird: %s", dir->msg);
705 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
706 media_type.c_str(), pool_name.c_str(),
707 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
712 jcr->write_store = dirstore;
714 jcr->read_store = dirstore;
716 rctx.append = append;
717 unbash_spaces(store_name);
718 unbash_spaces(media_type);
719 unbash_spaces(pool_name);
720 unbash_spaces(pool_type);
721 store = new DIRSTORE;
722 dirstore->append(store);
723 memset(store, 0, sizeof(DIRSTORE));
724 store->device = New(alist(10));
725 bstrncpy(store->name, store_name, sizeof(store->name));
726 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
727 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
728 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
729 store->append = append;
731 /* Now get all devices */
732 while (dir->recv() >= 0) {
733 Dmsg1(dbglvl, "<dird device: %s", dir->msg);
734 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
738 unbash_spaces(dev_name);
739 store->device->append(bstrdup(dev_name.c_str()));
741 } while (ok && dir->recv() >= 0);
743 /* Developer debug code */
745 if (debug_level >= dbglvl) {
746 foreach_alist(store, dirstore) {
747 Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
748 store->name, store->media_type, store->pool_name,
749 store->pool_type, store->append);
750 foreach_alist(device_name, store->device) {
751 Dmsg1(dbglvl, " Device=%s\n", device_name);
756 init_jcr_device_wait_timers(jcr);
757 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
759 BSOCK *dir = jcr->dir_bsock;
760 dir->fsend(_("3939 Could not get dcr\n"));
761 Dmsg1(dbglvl, ">dird: %s", dir->msg);
765 * At this point, we have a list of all the Director's Storage
766 * resources indicated for this Job, which include Pool, PoolType,
767 * storage name, and Media type.
768 * Then for each of the Storage resources, we have a list of
769 * device names that were given.
771 * Wiffle through them and find one that can do the backup.
774 int wait_for_device_retries = 0;
777 rctx.notify_dir = true;
780 for ( ; !fail && !job_canceled(jcr); ) {
781 pop_reserve_messages(jcr);
782 rctx.suitable_device = false;
783 rctx.have_volume = false;
784 rctx.VolumeName[0] = 0;
785 rctx.any_drive = false;
786 if (!jcr->PreferMountedVols) {
788 * Here we try to find a drive that is not used.
789 * This will maximize the use of available drives.
792 rctx.num_writers = 20000000; /* start with impossible number */
793 rctx.low_use_drive = NULL;
794 rctx.PreferMountedVols = false;
795 rctx.exact_match = false;
796 rctx.autochanger_only = true;
797 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
800 /* Look through all drives possibly for low_use drive */
801 if (rctx.low_use_drive) {
802 rctx.try_low_use_drive = true;
803 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
806 rctx.try_low_use_drive = false;
808 rctx.autochanger_only = false;
809 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
814 * Now we look for a drive that may or may not be in
817 /* Look for an exact Volume match all drives */
818 rctx.PreferMountedVols = true;
819 rctx.exact_match = true;
820 rctx.autochanger_only = false;
821 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
824 /* Look for any mounted drive */
825 rctx.exact_match = false;
826 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
830 rctx.any_drive = true;
831 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
834 /* Keep reservations locked *except* during wait_for_device() */
835 unlock_reservations();
837 * The idea of looping on repeat a few times it to ensure
838 * that if there is some subtle timing problem between two
839 * jobs, we will simply try again, and most likely succeed.
840 * This can happen if one job reserves a drive or finishes using
841 * a drive at the same time a second job wants it.
843 if (repeat++ > 1) { /* try algorithm 3 times */
844 bmicrosleep(30, 0); /* wait a bit */
845 Dmsg0(dbglvl, "repeat reserve algorithm\n");
846 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
847 Dmsg0(dbglvl, "Fail. !suitable_device || !wait_for_device\n");
851 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
853 unlock_reservations();
856 * If we get here, there are no suitable devices available, which
857 * means nothing configured. If a device is suitable but busy
858 * with another Volume, we will not come here.
860 unbash_spaces(dir->msg);
861 pm_strcpy(jcr->errmsg, dir->msg);
862 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
863 Jmsg(jcr, M_FATAL, 0, _("\n"
864 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
865 dev_name.c_str(), media_type.c_str());
866 dir->fsend(NO_device, dev_name.c_str());
868 Dmsg1(dbglvl, ">dird: %s", dir->msg);
871 unbash_spaces(dir->msg);
872 pm_strcpy(jcr->errmsg, dir->msg);
873 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
874 dir->fsend(BAD_use, jcr->errmsg);
875 Dmsg1(dbglvl, ">dird: %s", dir->msg);
878 release_reserve_messages(jcr);
884 * Walk through the autochanger resources and check if
885 * the volume is in one of them.
887 * Returns: true if volume is in device
890 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
892 AUTOCHANGER *changer = vol->dev->device->changer_res;
894 /* Find resource, and make sure we were able to open it */
895 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
896 Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
899 Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
904 * Search for a device suitable for this job.
905 * Note, this routine sets sets rctx.suitable_device if any
906 * device exists within the SD. The device may not be actually
908 * It also returns if it finds a useable device.
910 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
919 dirstore = jcr->write_store;
921 dirstore = jcr->read_store;
923 Dmsg5(dbglvl, "Start find_suit_dev PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
924 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
925 rctx.autochanger_only, rctx.any_drive);
928 * If the appropriate conditions of this if are met, namely that
929 * we are appending and the user wants mounted drive (or we
930 * force try a mounted drive because they are all busy), we
931 * start by looking at all the Volumes in the volume list.
933 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
934 dlist *temp_vol_list, *save_vol_list;
937 Dmsg0(dbglvl, "lock volumes\n");
940 * Create a temporary copy of the volume list. We do this,
941 * to avoid having the volume list locked during the
942 * call to reserve_device(), which would cause a deadlock.
943 * Note, we may want to add an update counter on the vol_list
944 * so that if it is modified while we are traversing the copy
945 * we can take note and act accordingly (probably redo the
946 * search at least a few times).
948 Dmsg0(dbglvl, "duplicate vol list\n");
949 temp_vol_list = New(dlist(vol, &vol->link));
950 foreach_dlist(vol, vol_list) {
952 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
953 memset(tvol, 0, sizeof(VOLRES));
954 tvol->vol_name = bstrdup(vol->vol_name);
955 tvol->dev = vol->dev;
956 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
958 tvol->dev = NULL; /* don't zap dev entry */
960 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
961 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
964 Dmsg0(dbglvl, "unlock volumes\n");
967 /* Look through reserved volumes for one we can use */
968 Dmsg0(dbglvl, "look for vol in vol list\n");
969 foreach_dlist(vol, temp_vol_list) {
971 Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
974 /* Check with Director if this Volume is OK */
975 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
976 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
980 Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
981 foreach_alist(store, dirstore) {
984 foreach_alist(device_name, store->device) {
985 /* Found a device, try to use it */
986 rctx.device_name = device_name;
987 rctx.device = vol->dev->device;
989 if (vol->dev->is_autochanger()) {
990 Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
991 if (!is_vol_in_autochanger(rctx, vol)) {
994 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
995 Dmsg2(dbglvl, "device=%s not suitable want %s\n",
996 vol->dev->device->hdr.name, device_name);
1000 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
1001 rctx.have_volume = true;
1002 /* Try reserving this device and volume */
1003 Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
1004 stat = reserve_device(rctx);
1005 if (stat == 1) { /* found available device */
1006 Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
1009 } else if (stat == 0) { /* device busy */
1010 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
1012 /* otherwise error */
1013 Dmsg0(dbglvl, "No suitable device found.\n");
1015 rctx.have_volume = false;
1016 rctx.VolumeName[0] = 0;
1025 } /* end for loop over reserved volumes */
1027 Dmsg0(dbglvl, "lock volumes\n");
1029 save_vol_list = vol_list;
1030 vol_list = temp_vol_list;
1031 free_volume_list(); /* release temp_vol_list */
1032 vol_list = save_vol_list;
1033 Dmsg0(dbglvl, "deleted temp vol list\n");
1034 Dmsg0(dbglvl, "unlock volumes\n");
1036 debug_list_volumes("after free temp table");
1039 Dmsg1(dbglvl, "OK dev found. Vol=%s from in-use vols list\n", rctx.VolumeName);
1044 * No reserved volume we can use, so now search for an available device.
1046 * For each storage device that the user specified, we
1047 * search and see if there is a resource for that device.
1049 foreach_alist(store, dirstore) {
1051 foreach_alist(device_name, store->device) {
1053 rctx.device_name = device_name;
1054 stat = search_res_for_device(rctx);
1055 if (stat == 1) { /* found available device */
1056 Dmsg1(dbglvl, "available device found=%s\n", device_name);
1059 } else if (stat == 0) { /* device busy */
1060 Dmsg1(dbglvl, "No usable device=%s, busy: not use\n", device_name);
1062 /* otherwise error */
1063 Dmsg0(dbglvl, "No usable device found.\n");
1071 Dmsg1(dbglvl, "OK dev found. Vol=%s\n", rctx.VolumeName);
1073 Dmsg0(dbglvl, "Leave find_suit_dev: no dev found.\n");
1079 * Search for a particular storage device with particular storage
1080 * characteristics (MediaType).
1082 int search_res_for_device(RCTX &rctx)
1084 AUTOCHANGER *changer;
1087 Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
1088 /* Look through Autochangers first */
1089 foreach_res(changer, R_AUTOCHANGER) {
1090 Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
1091 /* Find resource, and make sure we were able to open it */
1092 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1093 /* Try each device in this AutoChanger */
1094 foreach_alist(rctx.device, changer->device) {
1095 Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
1096 if (!rctx.device->autoselect) {
1097 Dmsg1(100, "Device %s not autoselect skipped.\n",
1098 rctx.device->hdr.name);
1099 continue; /* device is not available */
1101 stat = reserve_device(rctx);
1102 if (stat != 1) { /* try another device */
1106 if (rctx.store->append == SD_APPEND) {
1107 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1108 rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
1110 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1111 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
1118 /* Now if requested look through regular devices */
1119 if (!rctx.autochanger_only) {
1120 foreach_res(rctx.device, R_DEVICE) {
1121 Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
1122 /* Find resource, and make sure we were able to open it */
1123 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1124 stat = reserve_device(rctx);
1125 if (stat != 1) { /* try another device */
1129 if (rctx.store->append == SD_APPEND) {
1130 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1131 rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
1133 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1134 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
1140 return -1; /* nothing found */
1144 * Try to reserve a specific device.
1146 * Returns: 1 -- OK, have DCR
1150 static int reserve_device(RCTX &rctx)
1154 const int name_len = MAX_NAME_LENGTH;
1156 /* Make sure MediaType is OK */
1157 Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
1158 rctx.device->media_type, rctx.store->media_type);
1159 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1163 /* Make sure device exists -- i.e. we can stat() it */
1164 if (!rctx.device->dev) {
1165 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1167 if (!rctx.device->dev) {
1168 if (rctx.device->changer_res) {
1169 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1170 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1171 rctx.device->hdr.name, rctx.device_name);
1173 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1174 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1177 return -1; /* no use waiting */
1180 rctx.suitable_device = true;
1181 Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
1182 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1184 BSOCK *dir = rctx.jcr->dir_bsock;
1185 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1186 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1189 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1190 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1191 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1192 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1193 if (rctx.store->append == SD_APPEND) {
1194 Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
1195 ok = reserve_device_for_append(dcr, rctx);
1200 rctx.jcr->dcr = dcr;
1201 Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1202 dcr->dev->num_reserved(),
1203 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1204 Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
1205 rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
1206 if (rctx.have_volume) {
1207 Dmsg0(dbglvl, "Call reserve_volume\n");
1208 if (reserve_volume(dcr, rctx.VolumeName)) {
1209 Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
1211 Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
1215 dcr->any_volume = true;
1216 Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
1217 if (dir_find_next_appendable_volume(dcr)) {
1218 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1219 rctx.have_volume = true;
1220 Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
1222 Dmsg0(dbglvl, "No next volume found\n");
1223 rctx.have_volume = false;
1224 rctx.VolumeName[0] = 0;
1226 * If there is at least one volume that is valid and in use,
1227 * but we get here, check if we are running with prefers
1228 * non-mounted drives. In that case, we have selected a
1229 * non-used drive and our one and only volume is mounted
1230 * elsewhere, so we bail out and retry using that drive.
1232 if (dcr->found_in_use() && !rctx.PreferMountedVols) {
1233 rctx.PreferMountedVols = true;
1234 if (dcr->VolumeName[0]) {
1235 dcr->unreserve_device();
1240 * Note. Under some circumstances, the Director can hand us
1241 * a Volume name that is not the same as the one on the current
1242 * drive, and in that case, the call above to find the next
1243 * volume will fail because in attempting to reserve the Volume
1244 * the code will realize that we already have a tape mounted,
1245 * and it will fail. This *should* only happen if there are
1246 * writers, thus the following test. In that case, we simply
1247 * bail out, and continue waiting, rather than plunging on
1248 * and hoping that the operator can resolve the problem.
1250 if (dcr->dev->num_writers != 0) {
1251 if (dcr->VolumeName[0]) {
1252 dcr->unreserve_device();
1259 ok = reserve_device_for_read(dcr);
1261 rctx.jcr->read_dcr = dcr;
1262 Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1263 dcr->dev->num_reserved(),
1264 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1271 if (rctx.notify_dir) {
1273 BSOCK *dir = rctx.jcr->dir_bsock;
1274 pm_strcpy(dev_name, rctx.device->hdr.name);
1275 bash_spaces(dev_name);
1276 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1277 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1284 rctx.have_volume = false;
1285 rctx.VolumeName[0] = 0;
1286 Dmsg0(dbglvl, "Not OK.\n");
1291 * We "reserve" the drive by setting the ST_READ bit. No one else
1292 * should touch the drive until that is cleared.
1293 * This allows the DIR to "reserve" the device before actually
1296 static bool reserve_device_for_read(DCR *dcr)
1298 DEVICE *dev = dcr->dev;
1299 JCR *jcr = dcr->jcr;
1306 if (is_device_unmounted(dev)) {
1307 Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
1308 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1309 jcr->JobId, dev->print_name());
1310 queue_reserve_message(jcr);
1314 if (dev->is_busy()) {
1315 Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1317 dev->state & ST_READ?1:0, dev->num_writers, dev->num_reserved());
1318 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1319 jcr->JobId, dev->print_name());
1320 queue_reserve_message(jcr);
1324 dev->clear_append();
1327 dcr->set_reserved();
1336 * We reserve the device for appending by incrementing
1337 * num_reserved(). We do virtually all the same work that
1338 * is done in acquire_device_for_append(), but we do
1339 * not attempt to mount the device. This routine allows
1340 * the DIR to reserve multiple devices before *really*
1341 * starting the job. It also permits the SD to refuse
1342 * certain devices (not up, ...).
1344 * Note, in reserving a device, if the device is for the
1345 * same pool and the same pool type, then it is acceptable.
1346 * The Media Type has already been checked. If we are
1347 * the first tor reserve the device, we put the pool
1348 * name and pool type in the device record.
1350 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1352 JCR *jcr = dcr->jcr;
1353 DEVICE *dev = dcr->dev;
1360 /* If device is being read, we cannot write it */
1361 if (dev->can_read()) {
1362 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1363 jcr->JobId, dev->print_name());
1364 Dmsg1(dbglvl, "%s", jcr->errmsg);
1365 queue_reserve_message(jcr);
1369 /* If device is unmounted, we are out of luck */
1370 if (is_device_unmounted(dev)) {
1371 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1372 jcr->JobId, dev->print_name());
1373 Dmsg1(dbglvl, "%s", jcr->errmsg);
1374 queue_reserve_message(jcr);
1378 Dmsg1(dbglvl, "reserve_append device is %s\n", dev->print_name());
1380 /* Now do detailed tests ... */
1381 if (can_reserve_drive(dcr, rctx) != 1) {
1382 Dmsg0(dbglvl, "can_reserve_drive!=1\n");
1386 dcr->set_reserved();
1394 static int is_pool_ok(DCR *dcr)
1396 DEVICE *dev = dcr->dev;
1397 JCR *jcr = dcr->jcr;
1399 /* Now check if we want the same Pool and pool type */
1400 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1401 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1402 /* OK, compatible device */
1403 Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
1406 /* Drive Pool not suitable for us */
1407 Mmsg(jcr->errmsg, _(
1408 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1409 (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
1410 dev->num_reserved(), dev->print_name());
1411 queue_reserve_message(jcr);
1412 Dmsg2(dbglvl, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1413 dev->pool_name, dcr->pool_name);
1418 static bool is_max_jobs_ok(DCR *dcr)
1420 DEVICE *dev = dcr->dev;
1421 JCR *jcr = dcr->jcr;
1423 Dmsg5(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Status=%s Vol=%s\n",
1424 dcr->VolCatInfo.VolCatMaxJobs,
1425 dcr->VolCatInfo.VolCatJobs, dev->num_reserved(),
1426 dcr->VolCatInfo.VolCatStatus,
1428 if (strcmp(dcr->VolCatInfo.VolCatStatus, "Recycle") == 0) {
1431 if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
1432 (dcr->VolCatInfo.VolCatJobs + dev->num_reserved())) {
1433 /* Max Job Vols depassed or already reserved */
1434 Mmsg(jcr->errmsg, _("3610 JobId=%u Volume max jobs exceeded on drive %s.\n"),
1435 (uint32_t)jcr->JobId, dev->print_name());
1436 queue_reserve_message(jcr);
1437 Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
1438 return false; /* wait */
1444 * Returns: 1 if drive can be reserved
1445 * 0 if we should wait
1446 * -1 on error or impossibility
1448 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1450 DEVICE *dev = dcr->dev;
1451 JCR *jcr = dcr->jcr;
1453 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1454 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1455 rctx.autochanger_only, rctx.any_drive);
1457 /* Check for max jobs on this Volume */
1458 if (!is_max_jobs_ok(dcr)) {
1462 /* setting any_drive overrides PreferMountedVols flag */
1463 if (!rctx.any_drive) {
1465 * When PreferMountedVols is set, we keep track of the
1466 * drive in use that has the least number of writers, then if
1467 * no unmounted drive is found, we try that drive. This
1468 * helps spread the load to the least used drives.
1470 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1471 Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
1472 dev->print_name(), rctx.low_use_drive->print_name());
1475 /* If he wants a free drive, but this one is busy, no go */
1476 if (!rctx.PreferMountedVols && dev->is_busy()) {
1477 /* Save least used drive */
1478 if ((dev->num_writers + dev->num_reserved()) < rctx.num_writers) {
1479 rctx.num_writers = dev->num_writers + dev->num_reserved();
1480 rctx.low_use_drive = dev;
1481 Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
1482 dev->print_name(), rctx.num_writers);
1484 Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->num_reserved());
1486 Dmsg0(dbglvl, "failed: !prefMnt && busy.\n");
1487 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1488 jcr->JobId, dev->print_name());
1489 queue_reserve_message(jcr);
1493 /* Check for prefer mounted volumes */
1494 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1495 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1496 jcr->JobId, dev->print_name());
1497 queue_reserve_message(jcr);
1498 Dmsg0(dbglvl, "failed: want mounted -- no vol\n");
1499 return 0; /* No volume mounted */
1502 /* Check for exact Volume name match */
1503 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1506 if (rctx.exact_match && rctx.have_volume) {
1508 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1509 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1510 rctx.autochanger_only, rctx.any_drive);
1511 Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
1512 rctx.have_volume, dev->VolHdr.VolumeName,
1513 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1514 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1515 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1517 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1518 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1520 queue_reserve_message(jcr);
1521 Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
1522 dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1525 if (!dcr->can_i_use_volume()) {
1526 return 0; /* fail if volume on another drive */
1531 /* Check for unused autochanger drive */
1532 if (rctx.autochanger_only && !dev->is_busy() &&
1533 dev->VolHdr.VolumeName[0] == 0) {
1534 /* Device is available but not yet reserved, reserve it for us */
1535 Dmsg1(dbglvl, "OK Res Unused autochanger %s.\n", dev->print_name());
1536 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1537 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1538 return 1; /* reserve drive */
1542 * Handle the case that there are no writers
1544 if (dev->num_writers == 0) {
1545 /* Now check if there are any reservations on the drive */
1546 if (dev->num_reserved()) {
1547 return is_pool_ok(dcr);
1548 } else if (dev->can_append()) {
1549 if (is_pool_ok(dcr)) {
1552 /* Changing pool, unload old tape if any in drive */
1553 Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
1554 /* ***FIXME*** use set_unload() */
1555 unload_autochanger(dcr, -1);
1558 /* Device is available but not yet reserved, reserve it for us */
1559 Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
1560 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1561 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1562 return 1; /* reserve drive */
1566 * Check if the device is in append mode with writers (i.e.
1567 * available if pool is the same).
1569 if (dev->can_append() || dev->num_writers > 0) {
1570 return is_pool_ok(dcr);
1572 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1573 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1574 jcr->JobId, dev->print_name());
1575 queue_reserve_message(jcr);
1576 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1577 return -1; /* error, should not get here */
1579 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1580 jcr->JobId, dev->print_name());
1581 queue_reserve_message(jcr);
1582 Dmsg1(dbglvl, "failed: No reserve %s\n", dev->print_name());
1590 * Queue a reservation error or failure message for this jcr
1592 static void queue_reserve_message(JCR *jcr)
1600 msgs = jcr->reserve_msgs;
1605 * Look for duplicate message. If found, do
1608 for (i=msgs->size()-1; i >= 0; i--) {
1609 msg = (char *)msgs->get(i);
1613 /* Comparison based on 4 digit message number */
1614 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1618 /* Message unique, so insert it */
1619 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1626 * Send any reservation messages queued for this jcr
1628 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1635 msgs = jcr->reserve_msgs;
1636 if (!msgs || msgs->size() == 0) {
1639 for (i=msgs->size()-1; i >= 0; i--) {
1640 msg = (char *)msgs->get(i);
1642 sendit(" ", 3, arg);
1643 sendit(msg, strlen(msg), arg);
1654 * Pop and release any reservations messages
1656 static void pop_reserve_messages(JCR *jcr)
1662 msgs = jcr->reserve_msgs;
1666 while ((msg = (char *)msgs->pop())) {
1674 * Also called from acquire.c
1676 void release_reserve_messages(JCR *jcr)
1678 pop_reserve_messages(jcr);
1680 if (!jcr->reserve_msgs) {
1683 delete jcr->reserve_msgs;
1684 jcr->reserve_msgs = NULL;