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 #define jid() ((int)get_jobid_from_tid())
44 const int dbglvl = 50;
46 static dlist *vol_list = NULL;
47 static brwlock_t reservation_lock;
48 static brwlock_t vol_list_lock;
50 /* Forward referenced functions */
51 static int can_reserve_drive(DCR *dcr, RCTX &rctx);
52 static int reserve_device(RCTX &rctx);
53 static bool reserve_device_for_read(DCR *dcr);
54 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx);
55 static bool use_storage_cmd(JCR *jcr);
56 static void queue_reserve_message(JCR *jcr);
57 static void pop_reserve_messages(JCR *jcr);
59 /* Requests from the Director daemon */
60 static char use_storage[] = "use storage=%127s media_type=%127s "
61 "pool_name=%127s pool_type=%127s append=%d copy=%d stripe=%d\n";
62 static char use_device[] = "use device=%127s\n";
64 /* Responses sent to Director daemon */
65 static char OK_device[] = "3000 OK use device device=%s\n";
66 static char NO_device[] = "3924 Device \"%s\" not in SD Device resources.\n";
67 static char BAD_use[] = "3913 Bad use command: %s\n";
69 bool use_cmd(JCR *jcr)
72 * Get the device, media, and pool information
74 if (!use_storage_cmd(jcr)) {
75 set_jcr_job_status(jcr, JS_ErrorTerminated);
76 memset(jcr->sd_auth_key, 0, strlen(jcr->sd_auth_key));
82 static int my_compare(void *item1, void *item2)
84 return strcmp(((VOLRES *)item1)->vol_name, ((VOLRES *)item2)->vol_name);
88 void init_reservations_lock()
91 if ((errstat=rwl_init(&reservation_lock)) != 0) {
93 Emsg1(M_ABORT, 0, _("Unable to initialize reservation lock. ERR=%s\n"),
94 be.bstrerror(errstat));
97 if ((errstat=rwl_init(&vol_list_lock)) != 0) {
99 Emsg1(M_ABORT, 0, _("Unable to initialize volume list lock. ERR=%s\n"),
100 be.bstrerror(errstat));
104 void term_reservations_lock()
106 rwl_destroy(&reservation_lock);
107 rwl_destroy(&vol_list_lock);
110 int reservations_lock_count = 0;
112 /* This applies to a drive and to Volumes */
113 void _lock_reservations()
116 reservations_lock_count++;
117 if ((errstat=rwl_writelock(&reservation_lock)) != 0) {
119 Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
120 errstat, be.bstrerror(errstat));
124 void _unlock_reservations()
127 reservations_lock_count--;
128 if ((errstat=rwl_writeunlock(&reservation_lock)) != 0) {
130 Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
131 errstat, be.bstrerror(errstat));
135 int vol_list_lock_count = 0;
140 vol_list_lock_count++;
141 if ((errstat=rwl_writelock(&vol_list_lock)) != 0) {
143 Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
144 errstat, be.bstrerror(errstat));
148 void _unlock_volumes()
151 vol_list_lock_count--;
152 if ((errstat=rwl_writeunlock(&vol_list_lock)) != 0) {
154 Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
155 errstat, be.bstrerror(errstat));
161 * List Volumes -- this should be moved to status.c
168 static void debug_list_volumes(const char *imsg)
171 POOL_MEM msg(PM_MESSAGE);
174 foreach_dlist(vol, vol_list) {
176 Mmsg(msg, "List from %s: %s at %p on device %s\n", imsg,
177 vol->vol_name, vol->vol_name, vol->dev->print_name());
179 Mmsg(msg, "List from %s: %s at %p no dev\n", imsg, vol->vol_name, vol->vol_name);
181 Dmsg2(dbglvl, "jid=%u %s", jid(), msg.c_str());
186 foreach_dlist(vol, vol_list) {
187 if (vol->dev == dev) {
188 Dmsg0(000, "Two Volumes on same device.\n");
195 // Dmsg2(dbglvl, "List from %s: %d volumes\n", imsg, count);
201 * List Volumes -- this should be moved to status.c
203 void list_volumes(void sendit(const char *msg, int len, void *sarg), void *arg)
206 POOL_MEM msg(PM_MESSAGE);
210 foreach_dlist(vol, vol_list) {
211 DEVICE *dev = vol->dev;
213 len = Mmsg(msg, "%s on device %s\n", vol->vol_name, dev->print_name());
214 sendit(msg.c_str(), len, arg);
215 len = Mmsg(msg, " Reader=%d writers=%d reserved=%d released=%d\n",
216 dev->can_read()?1:0, dev->num_writers, dev->reserved_device, vol->released);
217 sendit(msg.c_str(), len, arg);
219 len = Mmsg(msg, "%s no device. released=%d\n", vol->vol_name, vol->released);
220 sendit(msg.c_str(), len, arg);
227 * Create a Volume item to put in the Volume list
228 * Ensure that the device points to it.
230 static VOLRES *new_vol_item(DCR *dcr, const char *VolumeName)
233 vol = (VOLRES *)malloc(sizeof(VOLRES));
234 memset(vol, 0, sizeof(VOLRES));
235 vol->vol_name = bstrdup(VolumeName);
237 Dmsg4(dbglvl, "jid=%u new Vol=%s at %p dev=%s\n", (int)dcr->jcr->JobId,
238 VolumeName, vol->vol_name, vol->dev->print_name());
242 static void free_vol_item(VOLRES *vol)
257 * Put a new Volume entry in the Volume list. This
258 * effectively reserves the volume so that it will
259 * not be mounted again.
261 * If the device has any current volume associated with it,
262 * and it is a different Volume, and the device is not busy,
263 * we release the old Volume item and insert the new one.
265 * It is assumed that the device is free and locked so that
266 * we can change the device structure.
268 * Some details of the Volume list handling:
270 * 1. The Volume list entry must be attached to the drive (rather than
271 * attached to a job as it currently is. I.e. the drive that "owns"
272 * the volume (reserved, in use, mounted)
273 * must point to the volume (still to be maintained in a list).
275 * 2. The Volume is entered in the list when a drive is reserved.
277 * 3. When a drive is in use, the device code must appropriately update the
278 * volume name as it changes (currently the list is static -- an entry is
279 * removed when the Volume is no longer reserved, in use or mounted).
280 * The new code must keep the same list entry as long as the drive
281 * has any volume associated with it but the volume name in the list
282 * must be updated when the drive has a different volume mounted.
284 * 4. A job that has reserved a volume, can un-reserve the volume, and if the
285 * volume is not mounted, and not reserved, and not in use, it will be
286 * removed from the list.
288 * 5. If a job wants to reserve a drive with a different Volume from the one on
289 * the drive, it can re-use the drive for the new Volume.
291 * 6. If a job wants a Volume that is in a different drive, it can either use the
292 * other drive or take the volume, only if the other drive is not in use or
295 * One nice aspect of this is that the reserve use count and the writer use count
296 * already exist and are correctly programmed and will need no changes -- use
297 * counts are always very tricky.
299 * The old code had a concept of "reserving" a Volume, but was changed
300 * to reserving and using a drive. A volume is must be attached to (owned by) a
301 * drive and can move from drive to drive or be unused given certain specific
302 * conditions of the drive. The key is that the drive must "own" the Volume.
303 * The old code had the job (dcr) owning the volume (more or less). The job was
304 * to change the insertion and removal of the volumes from the list to be based
305 * on the drive rather than the job.
307 * Return: VOLRES entry on success
308 * NULL volume busy on another drive
310 VOLRES *reserve_volume(DCR *dcr, const char *VolumeName)
313 DEVICE *dev = dcr->dev;
317 Dmsg2(dbglvl, "jid=%u reserve_volume %s\n", jid(), VolumeName);
319 * We lock the reservations system here to ensure
320 * when adding a new volume that no newly scheduled
321 * job can reserve it.
324 debug_list_volumes("begin reserve_volume");
326 * First, remove any old volume attached to this device as it
331 Dmsg5(dbglvl, "jid=%u Vol attached=%s, newvol=%s release=%d on %s\n",
332 jid(), vol->vol_name, VolumeName, vol->released, dev->print_name());
334 * Make sure we don't remove the current volume we are inserting
335 * because it was probably inserted by another job, or it
336 * is not being used and is marked as released.
338 if (strcmp(vol->vol_name, VolumeName) == 0) {
339 Dmsg2(dbglvl, "jid=%u === OK, vol=%s on device. set not released.\n", jid(), VolumeName);
340 vol->released = false; /* retake vol if released previously */
341 goto get_out; /* Volume already on this device */
343 /* Don't release a volume if it is in use */
344 if (!vol->released) {
345 Dmsg2(dbglvl, "jid=%u Cannot free vol=%s. It is not released.\n", jid(), vol->vol_name);
346 vol = NULL; /* vol in use */
349 Dmsg3(dbglvl, "jid=%u reserve_vol free vol=%s at %p\n", jid(), vol->vol_name, vol->vol_name);
350 unload_autochanger(dcr, -1); /* unload the 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 Dmsg3(dbglvl, "jid=%u Found vol=%s dev-same=%d\n", jid(), 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 Dmsg3(dbglvl, "jid=%u reserve_vol free-tmp vol=%s at %p\n",
371 (int)dcr->jcr->JobId, 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 */
379 /* Check if we are trying to use the Volume on a different drive */
380 if (dev != vol->dev) {
381 /* Caller wants to switch Volume to another device */
382 if (!vol->dev->is_busy()) {
383 /* OK to move it -- I'm not sure this will work */
384 Dmsg4(dbglvl, "==== jid=%u Swap vol=%s from dev=%s to %s\n", jid(), VolumeName,
385 vol->dev->print_name(), dev->print_name());
386 vol->dev->vol = NULL; /* take vol from old drive */
387 vol->dev->VolHdr.VolumeName[0] = 0;
388 vol->dev = dev; /* point vol at new drive */
389 dev->vol = vol; /* point dev at vol */
390 dev->VolHdr.VolumeName[0] = 0;
392 Dmsg4(dbglvl, "jid=%u Volume busy could not swap vol=%s from dev=%s to %s\n",
393 jid(), VolumeName, vol->dev->print_name(), dev->print_name());
394 vol = NULL; /* device busy */
403 Dmsg2(dbglvl, "jid=%u === set not released. vol=%s\n", jid(), vol->vol_name);
404 vol->released = false;
406 debug_list_volumes("end new volume");
412 * Switch from current device to given device
415 void switch_device(DCR *dcr, DEVICE *dev)
420 memcpy(&save_dcr, dcr, sizeof(save_dcr));
421 clean_device(dcr); /* clean up the dcr */
423 dcr->dev = dev; /* get new device pointer */
424 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
425 dcr->dev->print_name());
427 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
428 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
429 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
430 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
431 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
432 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
434 dev->reserved_device++;
435 dcr->reserved_device = true;
441 * Search for a Volume name in the Volume list.
443 * Returns: VOLRES entry on success
444 * NULL if the Volume is not in the list
446 VOLRES *find_volume(DCR *dcr)
449 /* Do not lock reservations here */
451 vol.vol_name = bstrdup(dcr->VolumeName);
452 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
454 Dmsg3(dbglvl, "jid=%u find_vol=%s found=%d\n", jid(), dcr->VolumeName, fvol!=NULL);
455 debug_list_volumes("find_volume");
461 * Remove any reservation from a drive and tell the system
462 * that the volume is unused at least by us.
464 void unreserve_device(DCR *dcr)
466 DEVICE *dev = dcr->dev;
467 if (dcr->reserved_device) {
468 dcr->reserved_device = false;
469 dev->reserved_device--;
470 Dmsg3(dbglvl, "jid=%u Dec reserve=%d dev=%s\n", jid(), dev->reserved_device, dev->print_name());
471 dcr->reserved_device = false;
472 /* If we set read mode in reserving, remove it */
473 if (dev->can_read()) {
476 if (dev->num_writers < 0) {
477 Jmsg1(dcr->jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
478 dev->num_writers = 0;
480 if (dev->reserved_device == 0 && dev->num_writers == 0) {
487 * Free a Volume from the Volume list if it is no longer used
488 * Note, for tape drives we want to remember where the Volume
489 * was when last used, so rather than free the volume entry,
490 * we simply mark it "released" so when the drive is really
491 * needed for another volume, we can reuse it.
493 * Returns: true if the Volume found and "removed" from the list
494 * false if the Volume is not in the list or is in use
496 bool volume_unused(DCR *dcr)
498 DEVICE *dev = dcr->dev;
500 if (dev->vol == NULL) {
501 Dmsg2(dbglvl, "jid=%u vol_unused: no vol on %s\n", (int)dcr->jcr->JobId, dev->print_name());
502 debug_list_volumes("null vol cannot unreserve_volume");
507 if (dev->is_busy()) {
508 Dmsg2(dbglvl, "jid=%u vol_unused: no vol on %s\n", (int)dcr->jcr->JobId, dev->print_name());
509 debug_list_volumes("dev busy cannot unreserve_volume");
514 if (dev->num_writers > 0 || dev->reserved_device > 0) {
520 * If this is a tape, we do not free the volume, rather we wait
521 * until the autoloader unloads it, or until another tape is
522 * explicitly read in this drive. This allows the SD to remember
523 * where the tapes are or last were.
525 dev->vol->released = true;
526 if (dev->is_tape() || dev->is_autochanger()) {
530 * Note, this frees the volume reservation entry, but the
531 * file descriptor remains open with the OS.
533 return free_volume(dev);
538 * Unconditionally release the volume entry
540 bool free_volume(DEVICE *dev)
544 if (dev->vol == NULL) {
545 Dmsg2(dbglvl, "jid=%u No vol on dev %s\n", jid(), dev->print_name());
551 vol_list->remove(vol);
552 Dmsg3(dbglvl, "jid=%u free_volume %s dev=%s\n", jid(), vol->vol_name, dev->print_name());
554 debug_list_volumes("free_volume");
560 /* Create the Volume list */
561 void create_volume_list()
564 if (vol_list == NULL) {
565 vol_list = New(dlist(vol, &vol->link));
569 /* Release all Volumes from the list */
570 void free_volume_list()
577 foreach_dlist(vol, vol_list) {
579 Dmsg3(dbglvl, "jid=%u free vol_list Volume=%s dev=%s\n", jid(),
580 vol->vol_name, vol->dev->print_name());
582 Dmsg3(dbglvl, "jid=%u free vol_list Volume=%s dev=%p\n", jid(),
583 vol->vol_name, vol->dev);
586 vol->vol_name = NULL;
593 bool is_volume_in_use(DCR *dcr)
599 vol = find_volume(dcr);
601 Dmsg2(dbglvl, "jid=%u Vol=%s not in use.\n", jid(), dcr->VolumeName);
602 goto get_out; /* vol not in list */
604 ASSERT(vol->dev != NULL);
606 if (dcr->dev == vol->dev) { /* same device OK */
607 Dmsg2(dbglvl, "jid=%u Vol=%s on same dev.\n", jid(), dcr->VolumeName);
610 Dmsg4(dbglvl, "jid=%u Vol=%s on %s we have %s\n", jid(), dcr->VolumeName,
611 vol->dev->print_name(), dcr->dev->print_name());
613 if (!vol->dev->is_busy()) {
614 Dmsg3(dbglvl, "jid=%u Vol=%s dev=%s not busy.\n", jid(), dcr->VolumeName, vol->dev->print_name());
617 Dmsg3(dbglvl, "jid=%u Vol=%s dev=%s busy.\n", jid(), dcr->VolumeName, vol->dev->print_name());
619 Dmsg3(dbglvl, "jid=%u Vol=%s in use by %s.\n", jid(), dcr->VolumeName, vol->dev->print_name());
629 * We get the following type of information:
631 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
635 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
639 static bool use_storage_cmd(JCR *jcr)
641 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
642 BSOCK *dir = jcr->dir_bsock;
650 memset(&rctx, 0, sizeof(RCTX));
653 * If there are multiple devices, the director sends us
654 * use_device for each device that it wants to use.
656 dirstore = New(alist(10, not_owned_by_alist));
657 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
659 Dmsg2(dbglvl, "jid=%u <dird: %s", jid(), dir->msg);
660 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
661 media_type.c_str(), pool_name.c_str(),
662 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
667 jcr->write_store = dirstore;
669 jcr->read_store = dirstore;
671 rctx.append = append;
672 unbash_spaces(store_name);
673 unbash_spaces(media_type);
674 unbash_spaces(pool_name);
675 unbash_spaces(pool_type);
676 store = new DIRSTORE;
677 dirstore->append(store);
678 memset(store, 0, sizeof(DIRSTORE));
679 store->device = New(alist(10));
680 bstrncpy(store->name, store_name, sizeof(store->name));
681 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
682 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
683 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
684 store->append = append;
686 /* Now get all devices */
687 while (dir->recv() >= 0) {
688 Dmsg2(dbglvl, "jid=%u <dird device: %s", jid(), dir->msg);
689 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
693 unbash_spaces(dev_name);
694 store->device->append(bstrdup(dev_name.c_str()));
696 } while (ok && dir->recv() >= 0);
698 /* Developer debug code */
700 if (debug_level >= dbglvl) {
701 foreach_alist(store, dirstore) {
702 Dmsg6(dbglvl, "jid=%u Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
703 (int)rctx.jcr->JobId,
704 store->name, store->media_type, store->pool_name,
705 store->pool_type, store->append);
706 foreach_alist(device_name, store->device) {
707 Dmsg2(dbglvl, "jid=%u Device=%s\n", jid(), device_name);
712 init_jcr_device_wait_timers(jcr);
713 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
715 BSOCK *dir = jcr->dir_bsock;
716 dir->fsend(_("3939 Could not get dcr\n"));
717 Dmsg1(dbglvl, ">dird: %s", dir->msg);
721 * At this point, we have a list of all the Director's Storage
722 * resources indicated for this Job, which include Pool, PoolType,
723 * storage name, and Media type.
724 * Then for each of the Storage resources, we have a list of
725 * device names that were given.
727 * Wiffle through them and find one that can do the backup.
730 int wait_for_device_retries = 0;
733 rctx.notify_dir = true;
736 for ( ; !fail && !job_canceled(jcr); ) {
737 pop_reserve_messages(jcr);
738 rctx.suitable_device = false;
739 rctx.have_volume = false;
740 rctx.VolumeName[0] = 0;
741 rctx.any_drive = false;
742 if (!jcr->PreferMountedVols) {
744 * Here we try to find a drive that is not used.
745 * This will maximize the use of available drives.
748 rctx.num_writers = 20000000; /* start with impossible number */
749 rctx.low_use_drive = NULL;
750 rctx.PreferMountedVols = false;
751 rctx.exact_match = false;
752 rctx.autochanger_only = true;
753 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
754 (int)rctx.jcr->JobId,
755 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
756 rctx.autochanger_only, rctx.any_drive);
757 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
760 /* Look through all drives possibly for low_use drive */
761 if (rctx.low_use_drive) {
762 rctx.try_low_use_drive = true;
763 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
766 rctx.try_low_use_drive = false;
768 rctx.autochanger_only = false;
769 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
770 (int)rctx.jcr->JobId,
771 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
772 rctx.autochanger_only, rctx.any_drive);
773 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
778 * Now we look for a drive that may or may not be in
781 /* Look for an exact Volume match all drives */
782 rctx.PreferMountedVols = true;
783 rctx.exact_match = true;
784 rctx.autochanger_only = false;
785 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
786 (int)rctx.jcr->JobId,
787 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
788 rctx.autochanger_only, rctx.any_drive);
789 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
792 /* Look for any mounted drive */
793 rctx.exact_match = false;
794 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
795 (int)rctx.jcr->JobId,
796 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
797 rctx.autochanger_only, rctx.any_drive);
798 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
802 rctx.any_drive = true;
803 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
804 (int)rctx.jcr->JobId,
805 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
806 rctx.autochanger_only, rctx.any_drive);
807 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
810 /* Keep reservations locked *except* during wait_for_device() */
811 unlock_reservations();
813 * The idea of looping on repeat a few times it to ensure
814 * that if there is some subtle timing problem between two
815 * jobs, we will simply try again, and most likely succeed.
816 * This can happen if one job reserves a drive or finishes using
817 * a drive at the same time a second job wants it.
819 if (repeat++ > 1) { /* try algorithm 3 times */
820 bmicrosleep(30, 0); /* wait a bit */
821 Dmsg1(dbglvl, "jid=%u repeat reserve algorithm\n", (int)rctx.jcr->JobId);
822 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
823 Dmsg1(dbglvl, "jid=%u Fail. !suitable_device || !wait_for_device\n",
824 (int)rctx.jcr->JobId);
828 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
830 unlock_reservations();
833 * If we get here, there are no suitable devices available, which
834 * means nothing configured. If a device is suitable but busy
835 * with another Volume, we will not come here.
837 unbash_spaces(dir->msg);
838 pm_strcpy(jcr->errmsg, dir->msg);
839 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
840 Jmsg(jcr, M_FATAL, 0, _("\n"
841 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
842 dev_name.c_str(), media_type.c_str());
843 dir->fsend(NO_device, dev_name.c_str());
845 Dmsg2(dbglvl, "jid=%u >dird: %s", jid(), dir->msg);
848 unbash_spaces(dir->msg);
849 pm_strcpy(jcr->errmsg, dir->msg);
850 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
851 dir->fsend(BAD_use, jcr->errmsg);
852 Dmsg2(dbglvl, "jid=%u >dird: %s", jid(), dir->msg);
855 release_reserve_messages(jcr);
861 * Walk through the autochanger resources and check if
862 * the volume is in one of them.
864 * Returns: true if volume is in device
867 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
869 AUTOCHANGER *changer = vol->dev->device->changer_res;
871 /* Find resource, and make sure we were able to open it */
872 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
873 Dmsg2(dbglvl, "jid=%u Found changer device %s\n",
874 (int)rctx.jcr->JobId, vol->dev->device->hdr.name);
877 Dmsg2(dbglvl, "jid=%u Incorrect changer device %s\n",
878 (int)rctx.jcr->JobId, changer->hdr.name);
883 * Search for a device suitable for this job.
885 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
894 dirstore = jcr->write_store;
896 dirstore = jcr->read_store;
898 Dmsg5(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d\n",
899 (int)rctx.jcr->JobId,
900 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
901 rctx.autochanger_only);
904 * If the appropriate conditions of this if are met, namely that
905 * we are appending and the user wants mounted drive (or we
906 * force try a mounted drive because they are all busy), we
907 * start by looking at all the Volumes in the volume list.
909 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
910 dlist *temp_vol_list, *save_vol_list;
913 Dmsg0(dbglvl, "lock volumes\n");
916 * Create a temporary copy of the volume list. We do this,
917 * to avoid having the volume list locked during the
918 * call to reserve_device(), which would cause a deadlock.
919 * Note, we may want to add an update counter on the vol_list
920 * so that if it is modified while we are traversing the copy
921 * we can take note and act accordingly (probably redo the
922 * search at least a few times).
924 Dmsg1(dbglvl, "jid=%u duplicate vol list\n", (int)rctx.jcr->JobId);
925 temp_vol_list = New(dlist(vol, &vol->link));
926 foreach_dlist(vol, vol_list) {
928 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
929 memset(tvol, 0, sizeof(VOLRES));
930 tvol->vol_name = bstrdup(vol->vol_name);
931 tvol->dev = vol->dev;
932 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
934 tvol->dev = NULL; /* don't zap dev entry */
936 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
937 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
942 /* Look through reserved volumes for one we can use */
943 Dmsg1(dbglvl, "jid=%u look for vol in vol list\n", (int)rctx.jcr->JobId);
944 foreach_dlist(vol, temp_vol_list) {
946 Dmsg2(dbglvl, "jid=%u vol=%s no dev\n", (int)rctx.jcr->JobId, vol->vol_name);
949 /* Check with Director if this Volume is OK */
950 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
951 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
955 Dmsg2(dbglvl, "jid=%u vol=%s OK for this job\n", (int)rctx.jcr->JobId, vol->vol_name);
956 foreach_alist(store, dirstore) {
959 foreach_alist(device_name, store->device) {
960 /* Found a device, try to use it */
961 rctx.device_name = device_name;
962 rctx.device = vol->dev->device;
964 if (vol->dev->is_autochanger()) {
965 Dmsg2(dbglvl, "jid=%u vol=%s is in changer\n", (int)rctx.jcr->JobId,
967 if (!is_vol_in_autochanger(rctx, vol)) {
970 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
971 Dmsg3(dbglvl, "jid=%u device=%s not suitable want %s\n", (int)rctx.jcr->JobId,
972 vol->dev->device->hdr.name, device_name);
976 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
977 rctx.have_volume = true;
978 /* Try reserving this device and volume */
979 Dmsg3(dbglvl, "jid=%u try vol=%s on device=%s\n", (int)rctx.jcr->JobId,
980 rctx.VolumeName, device_name);
981 stat = reserve_device(rctx);
982 if (stat == 1) { /* found available device */
983 Dmsg2(dbglvl, "jid=%u Suitable device found=%s\n", (int)rctx.jcr->JobId,
987 } else if (stat == 0) { /* device busy */
988 Dmsg2(dbglvl, "jid=%u Suitable device=%s, busy: not use\n",
989 (int)rctx.jcr->JobId, device_name);
991 /* otherwise error */
992 Dmsg1(dbglvl, "jid=%u No suitable device found.\n", (int)rctx.jcr->JobId);
994 rctx.have_volume = false;
995 rctx.VolumeName[0] = 0;
1004 } /* end for loop over reserved volumes */
1006 Dmsg1(dbglvl, "%u lock volumes\n", jid());
1008 save_vol_list = vol_list;
1009 vol_list = temp_vol_list;
1010 free_volume_list(); /* release temp_vol_list */
1011 vol_list = save_vol_list;
1012 Dmsg1(dbglvl, "jid=%u deleted temp vol list\n", (int)rctx.jcr->JobId);
1013 Dmsg1(dbglvl, "jid=%u unlock volumes\n", (int)rctx.jcr->JobId);
1017 Dmsg2(dbglvl, "jid=%u got vol %s from in-use vols list\n", (int)rctx.jcr->JobId,
1023 * No reserved volume we can use, so now search for an available device.
1025 * For each storage device that the user specified, we
1026 * search and see if there is a resource for that device.
1028 foreach_alist(store, dirstore) {
1030 foreach_alist(device_name, store->device) {
1032 rctx.device_name = device_name;
1033 stat = search_res_for_device(rctx);
1034 if (stat == 1) { /* found available device */
1035 Dmsg2(dbglvl, "jid=%u available device found=%s\n", (int)rctx.jcr->JobId,
1039 } else if (stat == 0) { /* device busy */
1040 Dmsg2(dbglvl, "jid=%u Suitable device=%s, busy: not use\n",
1041 (int)rctx.jcr->JobId, device_name);
1043 /* otherwise error */
1044 Dmsg1(dbglvl, "jid=%u No suitable device found.\n", (int)rctx.jcr->JobId);
1055 * Search for a particular storage device with particular storage
1056 * characteristics (MediaType).
1058 int search_res_for_device(RCTX &rctx)
1060 AUTOCHANGER *changer;
1063 Dmsg2(dbglvl, "jid=%u search res for %s\n", (int)rctx.jcr->JobId, rctx.device_name);
1064 /* Look through Autochangers first */
1065 foreach_res(changer, R_AUTOCHANGER) {
1066 Dmsg2(dbglvl, "jid=%u Try match changer res=%s\n", (int)rctx.jcr->JobId, changer->hdr.name);
1067 /* Find resource, and make sure we were able to open it */
1068 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1069 /* Try each device in this AutoChanger */
1070 foreach_alist(rctx.device, changer->device) {
1071 Dmsg2(dbglvl, "jid=%u Try changer device %s\n", (int)rctx.jcr->JobId,
1072 rctx.device->hdr.name);
1073 stat = reserve_device(rctx);
1074 if (stat != 1) { /* try another device */
1078 if (rctx.store->append == SD_APPEND) {
1079 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for append.\n",
1080 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1081 rctx.jcr->dcr->dev->reserved_device);
1083 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for read.\n",
1084 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1085 rctx.jcr->read_dcr->dev->reserved_device);
1092 /* Now if requested look through regular devices */
1093 if (!rctx.autochanger_only) {
1094 foreach_res(rctx.device, R_DEVICE) {
1095 Dmsg2(dbglvl, "jid=%u Try match res=%s\n", (int)rctx.jcr->JobId, rctx.device->hdr.name);
1096 /* Find resource, and make sure we were able to open it */
1097 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1098 stat = reserve_device(rctx);
1099 if (stat != 1) { /* try another device */
1103 if (rctx.store->append == SD_APPEND) {
1104 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for append.\n",
1105 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1106 rctx.jcr->dcr->dev->reserved_device);
1108 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for read.\n",
1109 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1110 rctx.jcr->read_dcr->dev->reserved_device);
1116 return -1; /* nothing found */
1120 * Try to reserve a specific device.
1122 * Returns: 1 -- OK, have DCR
1126 static int reserve_device(RCTX &rctx)
1130 const int name_len = MAX_NAME_LENGTH;
1132 /* Make sure MediaType is OK */
1133 Dmsg3(dbglvl, "jid=%u chk MediaType device=%s request=%s\n",
1134 (int)rctx.jcr->JobId,
1135 rctx.device->media_type, rctx.store->media_type);
1136 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1140 /* Make sure device exists -- i.e. we can stat() it */
1141 if (!rctx.device->dev) {
1142 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1144 if (!rctx.device->dev) {
1145 if (rctx.device->changer_res) {
1146 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1147 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1148 rctx.device->hdr.name, rctx.device_name);
1150 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1151 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1154 return -1; /* no use waiting */
1157 rctx.suitable_device = true;
1158 Dmsg2(dbglvl, "jid=%u try reserve %s\n", rctx.jcr->JobId, rctx.device->hdr.name);
1159 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1161 BSOCK *dir = rctx.jcr->dir_bsock;
1162 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1163 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1166 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1167 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1168 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1169 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1170 if (rctx.store->append == SD_APPEND) {
1171 Dmsg3(dbglvl, "jid=%u have_vol=%d vol=%s\n", (int)rctx.jcr->JobId,
1172 rctx.have_volume, rctx.VolumeName);
1173 ok = reserve_device_for_append(dcr, rctx);
1178 rctx.jcr->dcr = dcr;
1179 Dmsg6(dbglvl, "jid=%u Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1180 (int)rctx.jcr->JobId,
1181 dcr->dev->reserved_device,
1182 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1183 if (rctx.have_volume) {
1184 if (reserve_volume(dcr, rctx.VolumeName)) {
1185 Dmsg2(dbglvl, "jid=%u Reserved vol=%s\n", jid(), rctx.VolumeName);
1187 Dmsg2(dbglvl, "jid=%u Could not reserve vol=%s\n", jid(), rctx.VolumeName);
1191 dcr->any_volume = true;
1192 if (dir_find_next_appendable_volume(dcr)) {
1193 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1194 Dmsg2(dbglvl, "jid=%u looking for Volume=%s\n", (int)rctx.jcr->JobId, rctx.VolumeName);
1195 rctx.have_volume = true;
1197 Dmsg1(dbglvl, "jid=%u No next volume found\n", (int)rctx.jcr->JobId);
1198 rctx.have_volume = false;
1199 rctx.VolumeName[0] = 0;
1201 * If there is at least one volume that is valid and in use,
1202 * but we get here, check if we are running with prefers
1203 * non-mounted drives. In that case, we have selected a
1204 * non-used drive and our one and only volume is mounted
1205 * elsewhere, so we bail out and retry using that drive.
1207 if (dcr->volume_in_use && !rctx.PreferMountedVols) {
1208 rctx.PreferMountedVols = true;
1209 if (dcr->VolumeName[0]) {
1210 unreserve_device(dcr);
1215 * Note. Under some circumstances, the Director can hand us
1216 * a Volume name that is not the same as the one on the current
1217 * drive, and in that case, the call above to find the next
1218 * volume will fail because in attempting to reserve the Volume
1219 * the code will realize that we already have a tape mounted,
1220 * and it will fail. This *should* only happen if there are
1221 * writers, thus the following test. In that case, we simply
1222 * bail out, and continue waiting, rather than plunging on
1223 * and hoping that the operator can resolve the problem.
1225 if (dcr->dev->num_writers != 0) {
1226 if (dcr->VolumeName[0]) {
1227 unreserve_device(dcr);
1234 ok = reserve_device_for_read(dcr);
1236 rctx.jcr->read_dcr = dcr;
1237 Dmsg6(dbglvl, "jid=%u Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1238 (int)rctx.jcr->JobId,
1239 dcr->dev->reserved_device,
1240 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1247 if (rctx.notify_dir) {
1249 BSOCK *dir = rctx.jcr->dir_bsock;
1250 pm_strcpy(dev_name, rctx.device->hdr.name);
1251 bash_spaces(dev_name);
1252 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1253 Dmsg2(dbglvl, "jid=%u >dird changer: %s", jid(), dir->msg);
1260 rctx.have_volume = false;
1261 Dmsg1(dbglvl, "jid=%u Not OK.\n", (int)rctx.jcr->JobId);
1262 rctx.VolumeName[0] = 0;
1267 * We "reserve" the drive by setting the ST_READ bit. No one else
1268 * should touch the drive until that is cleared.
1269 * This allows the DIR to "reserve" the device before actually
1272 static bool reserve_device_for_read(DCR *dcr)
1274 DEVICE *dev = dcr->dev;
1275 JCR *jcr = dcr->jcr;
1282 if (is_device_unmounted(dev)) {
1283 Dmsg2(dbglvl, "jid=%u Device %s is BLOCKED due to user unmount.\n",
1284 (int)jcr->JobId, dev->print_name());
1285 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1286 jcr->JobId, dev->print_name());
1287 queue_reserve_message(jcr);
1291 if (dev->is_busy()) {
1292 Dmsg5(dbglvl, "jid=%u Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1293 (int)jcr->JobId, dev->print_name(),
1294 dev->state & ST_READ?1:0, dev->num_writers, dev->reserved_device);
1295 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1296 jcr->JobId, dev->print_name());
1297 queue_reserve_message(jcr);
1301 dev->clear_append();
1304 dev->reserved_device++;
1305 Dmsg4(dbglvl, "jid=%u Inc reserve=%d dev=%s %p\n", (int)jcr->JobId,
1306 dev->reserved_device, dev->print_name(), dev);
1307 dcr->reserved_device = true;
1316 * We reserve the device for appending by incrementing the
1317 * reserved_device. We do virtually all the same work that
1318 * is done in acquire_device_for_append(), but we do
1319 * not attempt to mount the device. This routine allows
1320 * the DIR to reserve multiple devices before *really*
1321 * starting the job. It also permits the SD to refuse
1322 * certain devices (not up, ...).
1324 * Note, in reserving a device, if the device is for the
1325 * same pool and the same pool type, then it is acceptable.
1326 * The Media Type has already been checked. If we are
1327 * the first tor reserve the device, we put the pool
1328 * name and pool type in the device record.
1330 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1332 JCR *jcr = dcr->jcr;
1333 DEVICE *dev = dcr->dev;
1340 /* If device is being read, we cannot write it */
1341 if (dev->can_read()) {
1342 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1343 jcr->JobId, dev->print_name());
1344 Dmsg2(dbglvl, "jid=%u %s", jid(), jcr->errmsg);
1345 queue_reserve_message(jcr);
1349 /* If device is unmounted, we are out of luck */
1350 if (is_device_unmounted(dev)) {
1351 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1352 jcr->JobId, dev->print_name());
1353 Dmsg2(dbglvl, "jid=%u %s", jid(), jcr->errmsg);
1354 queue_reserve_message(jcr);
1358 Dmsg2(dbglvl, "jid=%u reserve_append device is %s\n",
1359 (int)jcr->JobId, dev->print_name());
1361 /* Now do detailed tests ... */
1362 if (can_reserve_drive(dcr, rctx) != 1) {
1363 Dmsg1(dbglvl, "jid=%u can_reserve_drive!=1\n", (int)jcr->JobId);
1367 dev->reserved_device++;
1368 Dmsg4(dbglvl, "jid=%u Inc reserve=%d dev=%s %p\n", (int)jcr->JobId, dev->reserved_device,
1369 dev->print_name(), dev);
1370 dcr->reserved_device = true;
1378 static int is_pool_ok(DCR *dcr)
1380 DEVICE *dev = dcr->dev;
1381 JCR *jcr = dcr->jcr;
1383 /* Now check if we want the same Pool and pool type */
1384 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1385 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1386 /* OK, compatible device */
1387 Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
1390 /* Drive Pool not suitable for us */
1391 Mmsg(jcr->errmsg, _(
1392 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1393 (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
1394 dev->reserved_device, dev->print_name());
1395 queue_reserve_message(jcr);
1396 Dmsg2(dbglvl, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1397 dev->pool_name, dcr->pool_name);
1402 static bool is_max_jobs_ok(DCR *dcr)
1404 DEVICE *dev = dcr->dev;
1405 JCR *jcr = dcr->jcr;
1407 Dmsg4(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Vol=%s\n",
1408 dcr->VolCatInfo.VolCatMaxJobs,
1409 dcr->VolCatInfo.VolCatJobs, dev->reserved_device,
1411 if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
1412 (dcr->VolCatInfo.VolCatJobs + dev->reserved_device)) {
1413 /* Max Job Vols depassed or already reserved */
1414 Mmsg(jcr->errmsg, _("3610 JobId=%u Volume max jobs exceeded on drive %s.\n"),
1415 (uint32_t)jcr->JobId, dev->print_name());
1416 queue_reserve_message(jcr);
1417 Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
1418 return false; /* wait */
1424 * Returns: 1 if drive can be reserved
1425 * 0 if we should wait
1426 * -1 on error or impossibility
1428 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1430 DEVICE *dev = dcr->dev;
1431 JCR *jcr = dcr->jcr;
1433 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1435 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1436 rctx.autochanger_only, rctx.any_drive);
1438 /* Check for max jobs on this Volume */
1439 if (!is_max_jobs_ok(dcr)) {
1443 /* setting any_drive overrides PreferMountedVols flag */
1444 if (!rctx.any_drive) {
1446 * When PreferMountedVols is set, we keep track of the
1447 * drive in use that has the least number of writers, then if
1448 * no unmounted drive is found, we try that drive. This
1449 * helps spread the load to the least used drives.
1451 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1452 Dmsg3(dbglvl, "jid=%u OK dev=%s == low_drive=%s.\n",
1453 jcr->JobId, dev->print_name(), rctx.low_use_drive->print_name());
1456 /* If he wants a free drive, but this one is busy, no go */
1457 if (!rctx.PreferMountedVols && dev->is_busy()) {
1458 /* Save least used drive */
1459 if ((dev->num_writers + dev->reserved_device) < rctx.num_writers) {
1460 rctx.num_writers = dev->num_writers + dev->reserved_device;
1461 rctx.low_use_drive = dev;
1462 Dmsg3(dbglvl, "jid=%u set low use drive=%s num_writers=%d\n",
1463 (int)jcr->JobId, dev->print_name(), rctx.num_writers);
1465 Dmsg2(dbglvl, "jid=%u not low use num_writers=%d\n",
1466 (int)jcr->JobId, dev->num_writers+dev->reserved_device);
1468 Dmsg1(dbglvl, "jid=%u failed: !prefMnt && busy.\n", jcr->JobId);
1469 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1470 jcr->JobId, dev->print_name());
1471 queue_reserve_message(jcr);
1475 /* Check for prefer mounted volumes */
1476 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1477 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1478 jcr->JobId, dev->print_name());
1479 queue_reserve_message(jcr);
1480 Dmsg1(dbglvl, "jid=%u failed: want mounted -- no vol\n", (uint32_t)jcr->JobId);
1481 return 0; /* No volume mounted */
1484 /* Check for exact Volume name match */
1485 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1488 if (rctx.exact_match && rctx.have_volume) {
1490 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1492 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1493 rctx.autochanger_only, rctx.any_drive);
1494 Dmsg5(dbglvl, "jid=%u have_vol=%d have=%s resvol=%s want=%s\n",
1495 (int)jcr->JobId, rctx.have_volume, dev->VolHdr.VolumeName,
1496 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1497 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1498 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1500 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1501 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1503 queue_reserve_message(jcr);
1504 Dmsg4(dbglvl, "jid=%u not OK: dev have=%s resvol=%s want=%s\n",
1505 (int)jcr->JobId, dev->VolHdr.VolumeName,
1506 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1509 if (is_volume_in_use(dcr)) {
1510 return 0; /* fail if volume on another drive */
1515 /* Check for unused autochanger drive */
1516 if (rctx.autochanger_only && !dev->is_busy() &&
1517 dev->VolHdr.VolumeName[0] == 0) {
1518 /* Device is available but not yet reserved, reserve it for us */
1519 Dmsg2(dbglvl, "jid=%u OK Res Unused autochanger %s.\n",
1520 jcr->JobId, dev->print_name());
1521 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1522 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1523 return 1; /* reserve drive */
1527 * Handle the case that there are no writers
1529 if (dev->num_writers == 0) {
1530 /* Now check if there are any reservations on the drive */
1531 if (dev->reserved_device) {
1532 return is_pool_ok(dcr);
1533 } else if (dev->can_append()) {
1534 if (is_pool_ok(dcr)) {
1537 /* Changing pool, unload old tape if any in drive */
1538 Dmsg1(dbglvl, "jid=%u OK dev: num_writers=0, not reserved, pool change, unload changer\n",
1540 unload_autochanger(dcr, 0);
1543 /* Device is available but not yet reserved, reserve it for us */
1544 Dmsg2(dbglvl, "jid=%u OK Dev avail reserved %s\n", jcr->JobId, dev->print_name());
1545 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1546 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1547 return 1; /* reserve drive */
1551 * Check if the device is in append mode with writers (i.e.
1552 * available if pool is the same).
1554 if (dev->can_append() || dev->num_writers > 0) {
1555 return is_pool_ok(dcr);
1557 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1558 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1559 jcr->JobId, dev->print_name());
1560 queue_reserve_message(jcr);
1561 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1562 return -1; /* error, should not get here */
1564 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1565 jcr->JobId, dev->print_name());
1566 queue_reserve_message(jcr);
1567 Dmsg2(dbglvl, "jid=%u failed: No reserve %s\n", jcr->JobId, dev->print_name());
1575 * Queue a reservation error or failure message for this jcr
1577 static void queue_reserve_message(JCR *jcr)
1585 msgs = jcr->reserve_msgs;
1590 * Look for duplicate message. If found, do
1593 for (i=msgs->size()-1; i >= 0; i--) {
1594 msg = (char *)msgs->get(i);
1598 /* Comparison based on 4 digit message number */
1599 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1603 /* Message unique, so insert it */
1604 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1611 * Send any reservation messages queued for this jcr
1613 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1620 msgs = jcr->reserve_msgs;
1621 if (!msgs || msgs->size() == 0) {
1624 for (i=msgs->size()-1; i >= 0; i--) {
1625 msg = (char *)msgs->get(i);
1627 sendit(" ", 3, arg);
1628 sendit(msg, strlen(msg), arg);
1639 * Pop and release any reservations messages
1641 static void pop_reserve_messages(JCR *jcr)
1647 msgs = jcr->reserve_msgs;
1651 while ((msg = (char *)msgs->pop())) {
1659 * Also called from acquire.c
1661 void release_reserve_messages(JCR *jcr)
1663 pop_reserve_messages(jcr);
1665 if (!jcr->reserve_msgs) {
1668 delete jcr->reserve_msgs;
1669 jcr->reserve_msgs = NULL;