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 static 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 rel=%d on device %s\n", imsg,
182 vol->vol_name, vol->released, vol->dev->print_name());
184 Mmsg(msg, "List %s: %s rel=%d no dev\n", imsg, vol->vol_name, vol->released);
186 Dmsg1(dbglvl, "%s", msg.c_str());
191 foreach_dlist(vol, vol_list) {
192 if (vol->dev == dev) {
193 Dmsg0(dbglvl, "Two Volumes on same device.\n");
200 // Dmsg2(dbglvl, "List from %s: %d volumes\n", imsg, count);
206 * List Volumes -- this should be moved to status.c
208 void list_volumes(void sendit(const char *msg, int len, void *sarg), void *arg)
211 POOL_MEM msg(PM_MESSAGE);
215 foreach_dlist(vol, vol_list) {
216 DEVICE *dev = vol->dev;
218 len = Mmsg(msg, "%s on device %s\n", vol->vol_name, dev->print_name());
219 sendit(msg.c_str(), len, arg);
220 len = Mmsg(msg, " Reader=%d writers=%d reserved=%d released=%d\n",
221 dev->can_read()?1:0, dev->num_writers, dev->reserved_device, vol->released);
222 sendit(msg.c_str(), len, arg);
224 len = Mmsg(msg, "%s no device. released=%d\n", vol->vol_name, vol->released);
225 sendit(msg.c_str(), len, arg);
232 * Create a Volume item to put in the Volume list
233 * Ensure that the device points to it.
235 static VOLRES *new_vol_item(DCR *dcr, const char *VolumeName)
238 vol = (VOLRES *)malloc(sizeof(VOLRES));
239 memset(vol, 0, sizeof(VOLRES));
240 vol->vol_name = bstrdup(VolumeName);
242 Dmsg3(dbglvl, "new Vol=%s at %p dev=%s\n",
243 VolumeName, vol->vol_name, vol->dev->print_name());
247 static void free_vol_item(VOLRES *vol)
251 vol->dev->vol = NULL;
258 * Put a new Volume entry in the Volume list. This
259 * effectively reserves the volume so that it will
260 * not be mounted again.
262 * If the device has any current volume associated with it,
263 * and it is a different Volume, and the device is not busy,
264 * we release the old Volume item and insert the new one.
266 * It is assumed that the device is free and locked so that
267 * we can change the device structure.
269 * Some details of the Volume list handling:
271 * 1. The Volume list entry must be attached to the drive (rather than
272 * attached to a job as it currently is. I.e. the drive that "owns"
273 * the volume (reserved, in use, mounted)
274 * must point to the volume (still to be maintained in a list).
276 * 2. The Volume is entered in the list when a drive is reserved.
278 * 3. When a drive is in use, the device code must appropriately update the
279 * volume name as it changes (currently the list is static -- an entry is
280 * removed when the Volume is no longer reserved, in use or mounted).
281 * The new code must keep the same list entry as long as the drive
282 * has any volume associated with it but the volume name in the list
283 * must be updated when the drive has a different volume mounted.
285 * 4. A job that has reserved a volume, can un-reserve the volume, and if the
286 * volume is not mounted, and not reserved, and not in use, it will be
287 * removed from the list.
289 * 5. If a job wants to reserve a drive with a different Volume from the one on
290 * the drive, it can re-use the drive for the new Volume.
292 * 6. If a job wants a Volume that is in a different drive, it can either use the
293 * other drive or take the volume, only if the other drive is not in use or
296 * One nice aspect of this is that the reserve use count and the writer use count
297 * already exist and are correctly programmed and will need no changes -- use
298 * counts are always very tricky.
300 * The old code had a concept of "reserving" a Volume, but was changed
301 * to reserving and using a drive. A volume is must be attached to (owned by) a
302 * drive and can move from drive to drive or be unused given certain specific
303 * conditions of the drive. The key is that the drive must "own" the Volume.
304 * The old code had the job (dcr) owning the volume (more or less). The job was
305 * to change the insertion and removal of the volumes from the list to be based
306 * on the drive rather than the job.
308 * Return: VOLRES entry on success
309 * NULL volume busy on another drive
311 VOLRES *reserve_volume(DCR *dcr, const char *VolumeName)
314 DEVICE * volatile dev = dcr->dev;
318 Dmsg1(dbglvl, "enter reserve_volume %s\n", VolumeName);
320 * We lock the reservations system here to ensure
321 * when adding a new volume that no newly scheduled
322 * job can reserve it.
325 debug_list_volumes("begin reserve_volume");
327 * First, remove any old volume attached to this device as it
332 Dmsg4(dbglvl, "Vol attached=%s, newvol=%s release=%d on %s\n",
333 vol->vol_name, VolumeName, vol->released, dev->print_name());
335 * Make sure we don't remove the current volume we are inserting
336 * because it was probably inserted by another job, or it
337 * is not being used and is marked as released.
339 if (strcmp(vol->vol_name, VolumeName) == 0) {
340 Dmsg1(dbglvl, "=== OK, vol=%s on device. set not released.\n", VolumeName);
341 vol->released = false; /* retake vol if released previously */
342 goto get_out; /* Volume already on this device */
344 /* Don't release a volume if it is in use */
345 if (!vol->released) {
346 Dmsg1(dbglvl, "Cannot free vol=%s. It is not released.\n", vol->vol_name);
347 vol = NULL; /* vol in use */
350 Dmsg2(dbglvl, "reserve_vol free vol=%s at %p\n", vol->vol_name, vol->vol_name);
351 unload_autochanger(dcr, -1); /* unload the volume */
353 debug_list_volumes("reserve_vol free");
357 /* Create a new Volume entry */
358 nvol = new_vol_item(dcr, VolumeName);
361 * Now try to insert the new Volume
363 vol = (VOLRES *)vol_list->binary_insert(nvol, my_compare);
365 Dmsg2(dbglvl, "Found vol=%s dev-same=%d\n", vol->vol_name, dev==vol->dev);
367 * At this point, a Volume with this name already is in the list,
368 * so we simply release our new Volume entry. Note, this should
369 * only happen if we are moving the volume from one drive to another.
371 Dmsg2(dbglvl, "reserve_vol free-tmp vol=%s at %p\n",
372 vol->vol_name, vol->vol_name);
374 * Clear dev pointer so that free_vol_item() doesn't
375 * take away our volume.
377 nvol->dev = NULL; /* don't zap dev entry */
380 /* Check if we are trying to use the Volume on a different drive */
381 if (dev != vol->dev) {
382 /* Caller wants to switch Volume to another device */
383 Dmsg2(dbglvl, "==== Swap from dev=%s to %s\n",
384 dev->print_name(), vol->dev->print_name());
385 switch_device(dcr, vol->dev);
387 bstrncpy(dcr->VolumeName, VolumeName, sizeof(dcr->VolumeName));
389 if (!vol->dev->is_busy()) {
390 /* OK to move it -- I'm not sure this will work */
391 Dmsg3(dbglvl, "==== Swap vol=%s from dev=%s to %s\n", VolumeName,
392 vol->dev->print_name(), dev->print_name());
393 vol->dev->vol = NULL; /* take vol from old drive */
394 vol->dev->VolHdr.VolumeName[0] = 0;
395 vol->dev = dev; /* point vol at new drive */
396 dev->vol = vol; /* point dev at vol */
397 dev->VolHdr.VolumeName[0] = 0;
399 Dmsg3(dbglvl, "==== Swap not possible Vol busy vol=%s from dev=%s to %s\n",
400 VolumeName, vol->dev->print_name(), dev->print_name());
401 vol = NULL; /* device busy */
411 Dmsg1(dbglvl, "=== set not released. vol=%s\n", vol->vol_name);
412 vol->released = false;
414 debug_list_volumes("end new volume");
420 * Switch from current device to given device
423 void switch_device(DCR *dcr, DEVICE *dev)
425 // lock_reservations();
429 memcpy(&save_dcr, dcr, sizeof(save_dcr));
430 clean_device(dcr); /* clean up the dcr */
432 dcr->dev = dev; /* get new device pointer */
433 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
434 dcr->dev->print_name());
436 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
437 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
438 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
439 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
440 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
441 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
443 dev->reserved_device++;
444 dcr->reserved_device = true;
450 * Search for a Volume name in the Volume list.
452 * Returns: VOLRES entry on success
453 * NULL if the Volume is not in the list
455 VOLRES *find_volume(DCR *dcr)
458 /* Do not lock reservations here */
460 vol.vol_name = bstrdup(dcr->VolumeName);
461 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
463 Dmsg2(dbglvl, "find_vol=%s found=%d\n", dcr->VolumeName, fvol!=NULL);
464 debug_list_volumes("find_volume");
470 * Remove any reservation from a drive and tell the system
471 * that the volume is unused at least by us.
473 void unreserve_device(DCR *dcr)
475 DEVICE *dev = dcr->dev;
476 if (dcr->reserved_device) {
477 dcr->reserved_device = false;
478 dev->reserved_device--;
479 Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
480 dcr->reserved_device = false;
481 /* If we set read mode in reserving, remove it */
482 if (dev->can_read()) {
485 if (dev->num_writers < 0) {
486 Jmsg1(dcr->jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
487 dev->num_writers = 0;
489 if (dev->reserved_device == 0 && dev->num_writers == 0) {
496 * Free a Volume from the Volume list if it is no longer used
497 * Note, for tape drives we want to remember where the Volume
498 * was when last used, so rather than free the volume entry,
499 * we simply mark it "released" so when the drive is really
500 * needed for another volume, we can reuse it.
502 * Returns: true if the Volume found and "removed" from the list
503 * false if the Volume is not in the list or is in use
505 bool volume_unused(DCR *dcr)
507 DEVICE *dev = dcr->dev;
509 if (dev->vol == NULL) {
510 Dmsg1(dbglvl, "vol_unused: no vol on %s\n", dev->print_name());
511 debug_list_volumes("null vol cannot unreserve_volume");
516 if (dev->is_busy()) {
517 Dmsg1(dbglvl, "vol_unused: busy on %s\n", dev->print_name());
518 debug_list_volumes("dev busy cannot unreserve_volume");
523 if (dev->num_writers > 0 || dev->reserved_device > 0) {
529 * If this is a tape, we do not free the volume, rather we wait
530 * until the autoloader unloads it, or until another tape is
531 * explicitly read in this drive. This allows the SD to remember
532 * where the tapes are or last were.
534 Dmsg3(dbglvl, "=== mark released vol=%s num_writers=%d reserved=%d\n",
535 dev->vol->vol_name, dev->num_writers, dev->reserved_device);
536 dev->vol->released = true;
537 if (dev->is_tape()) { // || dev->is_autochanger()) {
541 * Note, this frees the volume reservation entry, but the
542 * file descriptor remains open with the OS.
544 return free_volume(dev);
549 * Unconditionally release the volume entry
551 bool free_volume(DEVICE *dev)
555 if (dev->vol == NULL) {
556 Dmsg1(dbglvl, "No vol on dev %s\n", dev->print_name());
562 vol_list->remove(vol);
563 Dmsg2(dbglvl, "=== free_volume %s dev=%s\n", vol->vol_name, dev->print_name());
565 debug_list_volumes("free_volume");
571 /* Create the Volume list */
572 void create_volume_list()
575 if (vol_list == NULL) {
576 vol_list = New(dlist(vol, &vol->link));
580 /* Release all Volumes from the list */
581 void free_volume_list()
588 foreach_dlist(vol, vol_list) {
590 Dmsg2(dbglvl, "free vol_list Volume=%s dev=%s\n", vol->vol_name, vol->dev->print_name());
592 Dmsg1(dbglvl, "free vol_list Volume=%s No dev\n", vol->vol_name);
595 vol->vol_name = NULL;
602 bool is_volume_in_use(DCR *dcr)
604 VOLRES *vol = find_volume(dcr);
606 Dmsg1(dbglvl, "Vol=%s not in use.\n", dcr->VolumeName);
607 return false; /* vol not in list */
609 ASSERT(vol->dev != NULL);
611 if (dcr->dev == vol->dev) { /* same device OK */
612 Dmsg1(dbglvl, "Vol=%s on same dev.\n", dcr->VolumeName);
615 Dmsg3(dbglvl, "Vol=%s on %s we have %s\n", dcr->VolumeName,
616 vol->dev->print_name(), dcr->dev->print_name());
618 if (!vol->dev->is_busy()) {
619 Dmsg2(dbglvl, "Vol=%s dev=%s not busy.\n", dcr->VolumeName, vol->dev->print_name());
622 Dmsg2(dbglvl, "Vol=%s dev=%s busy.\n", dcr->VolumeName, vol->dev->print_name());
624 Dmsg2(dbglvl, "Vol=%s in use by %s.\n", dcr->VolumeName, vol->dev->print_name());
630 * We get the following type of information:
632 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
636 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
640 static bool use_storage_cmd(JCR *jcr)
642 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
643 BSOCK *dir = jcr->dir_bsock;
651 memset(&rctx, 0, sizeof(RCTX));
654 * If there are multiple devices, the director sends us
655 * use_device for each device that it wants to use.
657 dirstore = New(alist(10, not_owned_by_alist));
658 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
660 Dmsg1(dbglvl, "<dird: %s", dir->msg);
661 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
662 media_type.c_str(), pool_name.c_str(),
663 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
668 jcr->write_store = dirstore;
670 jcr->read_store = dirstore;
672 rctx.append = append;
673 unbash_spaces(store_name);
674 unbash_spaces(media_type);
675 unbash_spaces(pool_name);
676 unbash_spaces(pool_type);
677 store = new DIRSTORE;
678 dirstore->append(store);
679 memset(store, 0, sizeof(DIRSTORE));
680 store->device = New(alist(10));
681 bstrncpy(store->name, store_name, sizeof(store->name));
682 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
683 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
684 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
685 store->append = append;
687 /* Now get all devices */
688 while (dir->recv() >= 0) {
689 Dmsg1(dbglvl, "<dird device: %s", dir->msg);
690 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
694 unbash_spaces(dev_name);
695 store->device->append(bstrdup(dev_name.c_str()));
697 } while (ok && dir->recv() >= 0);
699 /* Developer debug code */
701 if (debug_level >= dbglvl) {
702 foreach_alist(store, dirstore) {
703 Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
704 store->name, store->media_type, store->pool_name,
705 store->pool_type, store->append);
706 foreach_alist(device_name, store->device) {
707 Dmsg1(dbglvl, " Device=%s\n", 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 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
754 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
755 rctx.autochanger_only, rctx.any_drive);
756 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
759 /* Look through all drives possibly for low_use drive */
760 if (rctx.low_use_drive) {
761 rctx.try_low_use_drive = true;
762 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
765 rctx.try_low_use_drive = false;
767 rctx.autochanger_only = false;
768 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
769 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
770 rctx.autochanger_only, rctx.any_drive);
771 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
776 * Now we look for a drive that may or may not be in
779 /* Look for an exact Volume match all drives */
780 rctx.PreferMountedVols = true;
781 rctx.exact_match = true;
782 rctx.autochanger_only = false;
783 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
784 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
785 rctx.autochanger_only, rctx.any_drive);
786 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
789 /* Look for any mounted drive */
790 rctx.exact_match = false;
791 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
792 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
793 rctx.autochanger_only, rctx.any_drive);
794 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
798 rctx.any_drive = true;
799 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
800 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
801 rctx.autochanger_only, rctx.any_drive);
802 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
805 /* Keep reservations locked *except* during wait_for_device() */
806 unlock_reservations();
808 * The idea of looping on repeat a few times it to ensure
809 * that if there is some subtle timing problem between two
810 * jobs, we will simply try again, and most likely succeed.
811 * This can happen if one job reserves a drive or finishes using
812 * a drive at the same time a second job wants it.
814 if (repeat++ > 1) { /* try algorithm 3 times */
815 bmicrosleep(30, 0); /* wait a bit */
816 Dmsg0(dbglvl, "repeat reserve algorithm\n");
817 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
818 Dmsg0(dbglvl, "Fail. !suitable_device || !wait_for_device\n");
822 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
824 unlock_reservations();
827 * If we get here, there are no suitable devices available, which
828 * means nothing configured. If a device is suitable but busy
829 * with another Volume, we will not come here.
831 unbash_spaces(dir->msg);
832 pm_strcpy(jcr->errmsg, dir->msg);
833 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
834 Jmsg(jcr, M_FATAL, 0, _("\n"
835 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
836 dev_name.c_str(), media_type.c_str());
837 dir->fsend(NO_device, dev_name.c_str());
839 Dmsg1(dbglvl, ">dird: %s", dir->msg);
842 unbash_spaces(dir->msg);
843 pm_strcpy(jcr->errmsg, dir->msg);
844 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
845 dir->fsend(BAD_use, jcr->errmsg);
846 Dmsg1(dbglvl, ">dird: %s", dir->msg);
849 release_reserve_messages(jcr);
855 * Walk through the autochanger resources and check if
856 * the volume is in one of them.
858 * Returns: true if volume is in device
861 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
863 AUTOCHANGER *changer = vol->dev->device->changer_res;
865 /* Find resource, and make sure we were able to open it */
866 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
867 Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
870 Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
875 * Search for a device suitable for this job.
877 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
886 dirstore = jcr->write_store;
888 dirstore = jcr->read_store;
890 Dmsg4(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d\n",
891 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
892 rctx.autochanger_only);
895 * If the appropriate conditions of this if are met, namely that
896 * we are appending and the user wants mounted drive (or we
897 * force try a mounted drive because they are all busy), we
898 * start by looking at all the Volumes in the volume list.
900 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
901 dlist *temp_vol_list, *save_vol_list;
904 Dmsg0(dbglvl, "lock volumes\n");
907 * Create a temporary copy of the volume list. We do this,
908 * to avoid having the volume list locked during the
909 * call to reserve_device(), which would cause a deadlock.
910 * Note, we may want to add an update counter on the vol_list
911 * so that if it is modified while we are traversing the copy
912 * we can take note and act accordingly (probably redo the
913 * search at least a few times).
915 Dmsg0(dbglvl, "duplicate vol list\n");
916 temp_vol_list = New(dlist(vol, &vol->link));
917 foreach_dlist(vol, vol_list) {
919 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
920 memset(tvol, 0, sizeof(VOLRES));
921 tvol->vol_name = bstrdup(vol->vol_name);
922 tvol->dev = vol->dev;
923 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
925 tvol->dev = NULL; /* don't zap dev entry */
927 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
928 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
931 Dmsg0(dbglvl, "unlock volumes\n");
934 /* Look through reserved volumes for one we can use */
935 Dmsg0(dbglvl, "look for vol in vol list\n");
936 foreach_dlist(vol, temp_vol_list) {
938 Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
941 /* Check with Director if this Volume is OK */
942 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
943 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
947 Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
948 foreach_alist(store, dirstore) {
951 foreach_alist(device_name, store->device) {
952 /* Found a device, try to use it */
953 rctx.device_name = device_name;
954 rctx.device = vol->dev->device;
956 if (vol->dev->is_autochanger()) {
957 Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
958 if (!is_vol_in_autochanger(rctx, vol)) {
961 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
962 Dmsg2(dbglvl, "device=%s not suitable want %s\n",
963 vol->dev->device->hdr.name, device_name);
967 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
968 rctx.have_volume = true;
969 /* Try reserving this device and volume */
970 Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
971 stat = reserve_device(rctx);
972 if (stat == 1) { /* found available device */
973 Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
976 } else if (stat == 0) { /* device busy */
977 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
979 /* otherwise error */
980 Dmsg0(dbglvl, "No suitable device found.\n");
982 rctx.have_volume = false;
983 rctx.VolumeName[0] = 0;
992 } /* end for loop over reserved volumes */
994 Dmsg0(dbglvl, "lock volumes\n");
996 save_vol_list = vol_list;
997 vol_list = temp_vol_list;
998 free_volume_list(); /* release temp_vol_list */
999 vol_list = save_vol_list;
1000 Dmsg0(dbglvl, "deleted temp vol list\n");
1001 Dmsg0(dbglvl, "unlock volumes\n");
1003 debug_list_volumes("=== After free temp table\n");
1006 Dmsg1(dbglvl, "got vol %s from in-use vols list\n", rctx.VolumeName);
1011 * No reserved volume we can use, so now search for an available device.
1013 * For each storage device that the user specified, we
1014 * search and see if there is a resource for that device.
1016 foreach_alist(store, dirstore) {
1018 foreach_alist(device_name, store->device) {
1020 rctx.device_name = device_name;
1021 stat = search_res_for_device(rctx);
1022 if (stat == 1) { /* found available device */
1023 Dmsg1(dbglvl, "available device found=%s\n", device_name);
1026 } else if (stat == 0) { /* device busy */
1027 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
1029 /* otherwise error */
1030 Dmsg0(dbglvl, "No suitable device found.\n");
1041 * Search for a particular storage device with particular storage
1042 * characteristics (MediaType).
1044 int search_res_for_device(RCTX &rctx)
1046 AUTOCHANGER *changer;
1049 Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
1050 /* Look through Autochangers first */
1051 foreach_res(changer, R_AUTOCHANGER) {
1052 Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
1053 /* Find resource, and make sure we were able to open it */
1054 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1055 /* Try each device in this AutoChanger */
1056 foreach_alist(rctx.device, changer->device) {
1057 Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
1058 stat = reserve_device(rctx);
1059 if (stat != 1) { /* try another device */
1063 if (rctx.store->append == SD_APPEND) {
1064 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1065 rctx.device->hdr.name, rctx.jcr->dcr->dev->reserved_device);
1067 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1068 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->reserved_device);
1075 /* Now if requested look through regular devices */
1076 if (!rctx.autochanger_only) {
1077 foreach_res(rctx.device, R_DEVICE) {
1078 Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
1079 /* Find resource, and make sure we were able to open it */
1080 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1081 stat = reserve_device(rctx);
1082 if (stat != 1) { /* try another device */
1086 if (rctx.store->append == SD_APPEND) {
1087 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1088 rctx.device->hdr.name, rctx.jcr->dcr->dev->reserved_device);
1090 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1091 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->reserved_device);
1097 return -1; /* nothing found */
1101 * Try to reserve a specific device.
1103 * Returns: 1 -- OK, have DCR
1107 static int reserve_device(RCTX &rctx)
1111 const int name_len = MAX_NAME_LENGTH;
1113 /* Make sure MediaType is OK */
1114 Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
1115 rctx.device->media_type, rctx.store->media_type);
1116 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1120 /* Make sure device exists -- i.e. we can stat() it */
1121 if (!rctx.device->dev) {
1122 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1124 if (!rctx.device->dev) {
1125 if (rctx.device->changer_res) {
1126 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1127 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1128 rctx.device->hdr.name, rctx.device_name);
1130 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1131 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1134 return -1; /* no use waiting */
1137 rctx.suitable_device = true;
1138 Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
1139 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1141 BSOCK *dir = rctx.jcr->dir_bsock;
1142 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1143 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1146 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1147 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1148 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1149 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1150 if (rctx.store->append == SD_APPEND) {
1151 Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
1152 ok = reserve_device_for_append(dcr, rctx);
1157 rctx.jcr->dcr = dcr;
1158 Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1159 dcr->dev->reserved_device,
1160 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1161 Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
1162 rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
1163 if (rctx.have_volume) {
1164 if (reserve_volume(dcr, rctx.VolumeName)) {
1165 Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
1167 Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
1171 dcr->any_volume = true;
1172 Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
1173 if (dir_find_next_appendable_volume(dcr)) {
1174 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1175 rctx.have_volume = true;
1176 Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
1178 Dmsg0(dbglvl, "No next volume found\n");
1179 rctx.have_volume = false;
1180 rctx.VolumeName[0] = 0;
1182 * If there is at least one volume that is valid and in use,
1183 * but we get here, check if we are running with prefers
1184 * non-mounted drives. In that case, we have selected a
1185 * non-used drive and our one and only volume is mounted
1186 * elsewhere, so we bail out and retry using that drive.
1188 if (dcr->volume_in_use && !rctx.PreferMountedVols) {
1189 rctx.PreferMountedVols = true;
1190 if (dcr->VolumeName[0]) {
1191 unreserve_device(dcr);
1196 * Note. Under some circumstances, the Director can hand us
1197 * a Volume name that is not the same as the one on the current
1198 * drive, and in that case, the call above to find the next
1199 * volume will fail because in attempting to reserve the Volume
1200 * the code will realize that we already have a tape mounted,
1201 * and it will fail. This *should* only happen if there are
1202 * writers, thus the following test. In that case, we simply
1203 * bail out, and continue waiting, rather than plunging on
1204 * and hoping that the operator can resolve the problem.
1206 if (dcr->dev->num_writers != 0) {
1207 if (dcr->VolumeName[0]) {
1208 unreserve_device(dcr);
1215 ok = reserve_device_for_read(dcr);
1217 rctx.jcr->read_dcr = dcr;
1218 Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1219 dcr->dev->reserved_device,
1220 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1227 if (rctx.notify_dir) {
1229 BSOCK *dir = rctx.jcr->dir_bsock;
1230 pm_strcpy(dev_name, rctx.device->hdr.name);
1231 bash_spaces(dev_name);
1232 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1233 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1240 rctx.have_volume = false;
1241 rctx.VolumeName[0] = 0;
1242 Dmsg0(dbglvl, "Not OK.\n");
1247 * We "reserve" the drive by setting the ST_READ bit. No one else
1248 * should touch the drive until that is cleared.
1249 * This allows the DIR to "reserve" the device before actually
1252 static bool reserve_device_for_read(DCR *dcr)
1254 DEVICE *dev = dcr->dev;
1255 JCR *jcr = dcr->jcr;
1262 if (is_device_unmounted(dev)) {
1263 Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
1264 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1265 jcr->JobId, dev->print_name());
1266 queue_reserve_message(jcr);
1270 if (dev->is_busy()) {
1271 Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1273 dev->state & ST_READ?1:0, dev->num_writers, dev->reserved_device);
1274 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1275 jcr->JobId, dev->print_name());
1276 queue_reserve_message(jcr);
1280 dev->clear_append();
1283 dev->reserved_device++;
1284 Dmsg3(dbglvl, "Inc reserve=%d dev=%s %p\n", dev->reserved_device, dev->print_name(), dev);
1285 dcr->reserved_device = true;
1294 * We reserve the device for appending by incrementing the
1295 * reserved_device. We do virtually all the same work that
1296 * is done in acquire_device_for_append(), but we do
1297 * not attempt to mount the device. This routine allows
1298 * the DIR to reserve multiple devices before *really*
1299 * starting the job. It also permits the SD to refuse
1300 * certain devices (not up, ...).
1302 * Note, in reserving a device, if the device is for the
1303 * same pool and the same pool type, then it is acceptable.
1304 * The Media Type has already been checked. If we are
1305 * the first tor reserve the device, we put the pool
1306 * name and pool type in the device record.
1308 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1310 JCR *jcr = dcr->jcr;
1311 DEVICE *dev = dcr->dev;
1318 /* If device is being read, we cannot write it */
1319 if (dev->can_read()) {
1320 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1321 jcr->JobId, dev->print_name());
1322 Dmsg1(dbglvl, "%s", jcr->errmsg);
1323 queue_reserve_message(jcr);
1327 /* If device is unmounted, we are out of luck */
1328 if (is_device_unmounted(dev)) {
1329 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1330 jcr->JobId, dev->print_name());
1331 Dmsg1(dbglvl, "%s", jcr->errmsg);
1332 queue_reserve_message(jcr);
1336 Dmsg1(dbglvl, "reserve_append device is %s\n", dev->print_name());
1338 /* Now do detailed tests ... */
1339 if (can_reserve_drive(dcr, rctx) != 1) {
1340 Dmsg0(dbglvl, "can_reserve_drive!=1\n");
1344 dev->reserved_device++;
1345 Dmsg3(dbglvl, "Inc reserve=%d dev=%s %p\n", dev->reserved_device,
1346 dev->print_name(), dev);
1347 dcr->reserved_device = true;
1355 static int is_pool_ok(DCR *dcr)
1357 DEVICE *dev = dcr->dev;
1358 JCR *jcr = dcr->jcr;
1360 /* Now check if we want the same Pool and pool type */
1361 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1362 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1363 /* OK, compatible device */
1364 Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
1367 /* Drive Pool not suitable for us */
1368 Mmsg(jcr->errmsg, _(
1369 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1370 (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
1371 dev->reserved_device, dev->print_name());
1372 queue_reserve_message(jcr);
1373 Dmsg2(dbglvl, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1374 dev->pool_name, dcr->pool_name);
1379 static bool is_max_jobs_ok(DCR *dcr)
1381 DEVICE *dev = dcr->dev;
1382 JCR *jcr = dcr->jcr;
1384 Dmsg4(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Vol=%s\n",
1385 dcr->VolCatInfo.VolCatMaxJobs,
1386 dcr->VolCatInfo.VolCatJobs, dev->reserved_device,
1388 if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
1389 (dcr->VolCatInfo.VolCatJobs + dev->reserved_device)) {
1390 /* Max Job Vols depassed or already reserved */
1391 Mmsg(jcr->errmsg, _("3610 JobId=%u Volume max jobs exceeded on drive %s.\n"),
1392 (uint32_t)jcr->JobId, dev->print_name());
1393 queue_reserve_message(jcr);
1394 Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
1395 return false; /* wait */
1401 * Returns: 1 if drive can be reserved
1402 * 0 if we should wait
1403 * -1 on error or impossibility
1405 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1407 DEVICE *dev = dcr->dev;
1408 JCR *jcr = dcr->jcr;
1410 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1411 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1412 rctx.autochanger_only, rctx.any_drive);
1414 /* Check for max jobs on this Volume */
1415 if (!is_max_jobs_ok(dcr)) {
1419 /* setting any_drive overrides PreferMountedVols flag */
1420 if (!rctx.any_drive) {
1422 * When PreferMountedVols is set, we keep track of the
1423 * drive in use that has the least number of writers, then if
1424 * no unmounted drive is found, we try that drive. This
1425 * helps spread the load to the least used drives.
1427 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1428 Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
1429 dev->print_name(), rctx.low_use_drive->print_name());
1432 /* If he wants a free drive, but this one is busy, no go */
1433 if (!rctx.PreferMountedVols && dev->is_busy()) {
1434 /* Save least used drive */
1435 if ((dev->num_writers + dev->reserved_device) < rctx.num_writers) {
1436 rctx.num_writers = dev->num_writers + dev->reserved_device;
1437 rctx.low_use_drive = dev;
1438 Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
1439 dev->print_name(), rctx.num_writers);
1441 Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->reserved_device);
1443 Dmsg0(dbglvl, "failed: !prefMnt && busy.\n");
1444 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1445 jcr->JobId, dev->print_name());
1446 queue_reserve_message(jcr);
1450 /* Check for prefer mounted volumes */
1451 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1452 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1453 jcr->JobId, dev->print_name());
1454 queue_reserve_message(jcr);
1455 Dmsg0(dbglvl, "failed: want mounted -- no vol\n");
1456 return 0; /* No volume mounted */
1459 /* Check for exact Volume name match */
1460 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1463 if (rctx.exact_match && rctx.have_volume) {
1465 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1466 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1467 rctx.autochanger_only, rctx.any_drive);
1468 Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
1469 rctx.have_volume, dev->VolHdr.VolumeName,
1470 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1471 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1472 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1474 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1475 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1477 queue_reserve_message(jcr);
1478 Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
1479 dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1482 if (is_volume_in_use(dcr)) {
1483 return 0; /* fail if volume on another drive */
1488 /* Check for unused autochanger drive */
1489 if (rctx.autochanger_only && !dev->is_busy() &&
1490 dev->VolHdr.VolumeName[0] == 0) {
1491 /* Device is available but not yet reserved, reserve it for us */
1492 Dmsg1(dbglvl, "OK Res Unused autochanger %s.\n", dev->print_name());
1493 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1494 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1495 return 1; /* reserve drive */
1499 * Handle the case that there are no writers
1501 if (dev->num_writers == 0) {
1502 /* Now check if there are any reservations on the drive */
1503 if (dev->reserved_device) {
1504 return is_pool_ok(dcr);
1505 } else if (dev->can_append()) {
1506 if (is_pool_ok(dcr)) {
1509 /* Changing pool, unload old tape if any in drive */
1510 Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
1511 unload_autochanger(dcr, 0);
1514 /* Device is available but not yet reserved, reserve it for us */
1515 Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
1516 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1517 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1518 return 1; /* reserve drive */
1522 * Check if the device is in append mode with writers (i.e.
1523 * available if pool is the same).
1525 if (dev->can_append() || dev->num_writers > 0) {
1526 return is_pool_ok(dcr);
1528 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1529 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1530 jcr->JobId, dev->print_name());
1531 queue_reserve_message(jcr);
1532 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1533 return -1; /* error, should not get here */
1535 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1536 jcr->JobId, dev->print_name());
1537 queue_reserve_message(jcr);
1538 Dmsg1(dbglvl, "failed: No reserve %s\n", dev->print_name());
1546 * Queue a reservation error or failure message for this jcr
1548 static void queue_reserve_message(JCR *jcr)
1556 msgs = jcr->reserve_msgs;
1561 * Look for duplicate message. If found, do
1564 for (i=msgs->size()-1; i >= 0; i--) {
1565 msg = (char *)msgs->get(i);
1569 /* Comparison based on 4 digit message number */
1570 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1574 /* Message unique, so insert it */
1575 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1582 * Send any reservation messages queued for this jcr
1584 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1591 msgs = jcr->reserve_msgs;
1592 if (!msgs || msgs->size() == 0) {
1595 for (i=msgs->size()-1; i >= 0; i--) {
1596 msg = (char *)msgs->get(i);
1598 sendit(" ", 3, arg);
1599 sendit(msg, strlen(msg), arg);
1610 * Pop and release any reservations messages
1612 static void pop_reserve_messages(JCR *jcr)
1618 msgs = jcr->reserve_msgs;
1622 while ((msg = (char *)msgs->pop())) {
1630 * Also called from acquire.c
1632 void release_reserve_messages(JCR *jcr)
1634 pop_reserve_messages(jcr);
1636 if (!jcr->reserve_msgs) {
1639 delete jcr->reserve_msgs;
1640 jcr->reserve_msgs = NULL;