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 Dmsg2(dbglvl, "=== set not released vol=%s dev=%s\n", VolumeName,
341 vol->dev->print_name());
342 vol->released = false; /* retake vol if released previously */
343 dcr->reserved_volume = true; /* reserved volume */
344 goto get_out; /* Volume already on this device */
346 /* Don't release a volume if it is in use */
347 if (!vol->released && !dcr->reserved_volume) {
348 Dmsg1(dbglvl, "Cannot free vol=%s. It is not released.\n", vol->vol_name);
349 vol = NULL; /* vol in use */
352 Dmsg2(dbglvl, "reserve_vol free vol=%s at %p\n", vol->vol_name, vol->vol_name);
353 unload_autochanger(dcr, -1); /* unload the volume */
355 debug_list_volumes("reserve_vol free");
359 /* Create a new Volume entry */
360 nvol = new_vol_item(dcr, VolumeName);
363 * Now try to insert the new Volume
365 vol = (VOLRES *)vol_list->binary_insert(nvol, my_compare);
367 Dmsg2(dbglvl, "Found vol=%s dev-same=%d\n", vol->vol_name, dev==vol->dev);
369 * At this point, a Volume with this name already is in the list,
370 * so we simply release our new Volume entry. Note, this should
371 * only happen if we are moving the volume from one drive to another.
373 Dmsg2(dbglvl, "reserve_vol free-tmp vol=%s at %p\n",
374 vol->vol_name, vol->vol_name);
376 * Clear dev pointer so that free_vol_item() doesn't
377 * take away our volume.
379 nvol->dev = NULL; /* don't zap dev entry */
382 /* Check if we are trying to use the Volume on a different drive */
383 if (dev != vol->dev) {
384 /* Caller wants to switch Volume to another device */
385 Dmsg2(dbglvl, "==== Swap from dev=%s to %s\n",
386 dev->print_name(), vol->dev->print_name());
387 switch_device(dcr, vol->dev);
389 bstrncpy(dcr->VolumeName, VolumeName, sizeof(dcr->VolumeName));
391 if (!vol->dev->is_busy()) {
392 /* OK to move it -- I'm not sure this will work */
393 Dmsg3(dbglvl, "==== Swap vol=%s from dev=%s to %s\n", VolumeName,
394 vol->dev->print_name(), dev->print_name());
395 vol->dev->vol = NULL; /* take vol from old drive */
396 vol->dev->VolHdr.VolumeName[0] = 0;
397 vol->dev = dev; /* point vol at new drive */
398 dev->vol = vol; /* point dev at vol */
399 dev->VolHdr.VolumeName[0] = 0;
401 Dmsg3(dbglvl, "==== Swap not possible Vol busy vol=%s from dev=%s to %s\n",
402 VolumeName, vol->dev->print_name(), dev->print_name());
403 vol = NULL; /* device busy */
413 Dmsg2(dbglvl, "=== set not released. vol=%s dev=%s\n", vol->vol_name,
414 vol->dev->print_name());
415 vol->released = false;
416 dcr->reserved_volume = true;
418 debug_list_volumes("end new volume");
424 * Switch from current device to given device
427 void switch_device(DCR *dcr, DEVICE *dev)
432 memcpy(&save_dcr, dcr, sizeof(save_dcr));
433 clean_device(dcr); /* clean up the dcr */
435 dcr->dev = dev; /* get new device pointer */
436 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
437 dcr->dev->print_name());
439 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
440 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
441 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
442 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
443 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
444 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
446 dev->reserved_device++;
447 dcr->reserved_device = true;
453 * Search for a Volume name in the Volume list.
455 * Returns: VOLRES entry on success
456 * NULL if the Volume is not in the list
458 VOLRES *find_volume(DCR *dcr)
461 /* Do not lock reservations here */
463 vol.vol_name = bstrdup(dcr->VolumeName);
464 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
466 Dmsg2(dbglvl, "find_vol=%s found=%d\n", dcr->VolumeName, fvol!=NULL);
467 debug_list_volumes("find_volume");
473 * Remove any reservation from a drive and tell the system
474 * that the volume is unused at least by us.
476 void unreserve_device(DCR *dcr)
478 DEVICE *dev = dcr->dev;
479 if (dcr->reserved_device) {
480 dcr->reserved_device = false;
481 dcr->reserved_volume = false;
482 dev->reserved_device--;
483 Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
484 /* If we set read mode in reserving, remove it */
485 if (dev->can_read()) {
488 if (dev->num_writers < 0) {
489 Jmsg1(dcr->jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
490 dev->num_writers = 0;
492 if (dev->reserved_device == 0 && dev->num_writers == 0) {
499 * Free a Volume from the Volume list if it is no longer used
500 * Note, for tape drives we want to remember where the Volume
501 * was when last used, so rather than free the volume entry,
502 * we simply mark it "released" so when the drive is really
503 * needed for another volume, we can reuse it.
505 * Returns: true if the Volume found and "removed" from the list
506 * false if the Volume is not in the list or is in use
508 bool volume_unused(DCR *dcr)
510 DEVICE *dev = dcr->dev;
512 if (dev->vol == NULL) {
513 Dmsg1(dbglvl, "vol_unused: no vol on %s\n", dev->print_name());
514 debug_list_volumes("null vol cannot unreserve_volume");
519 if (dev->is_busy()) {
520 Dmsg1(dbglvl, "vol_unused: busy on %s\n", dev->print_name());
521 debug_list_volumes("dev busy cannot unreserve_volume");
526 if (dev->num_writers > 0 || dev->reserved_device > 0) {
532 * If this is a tape, we do not free the volume, rather we wait
533 * until the autoloader unloads it, or until another tape is
534 * explicitly read in this drive. This allows the SD to remember
535 * where the tapes are or last were.
537 Dmsg3(dbglvl, "=== mark released vol=%s num_writers=%d dev_reserved=%d\n",
538 dev->vol->vol_name, dev->num_writers, dev->reserved_device);
539 dev->vol->released = true;
540 Dmsg2(dbglvl, "=== set released. Vol=%s dev=%s\n", dev->vol->vol_name,
542 if (dev->is_tape()) { // || dev->is_autochanger()) {
546 * Note, this frees the volume reservation entry, but the
547 * file descriptor remains open with the OS.
549 return free_volume(dev);
554 * Unconditionally release the volume entry
556 bool free_volume(DEVICE *dev)
560 if (dev->vol == NULL) {
561 Dmsg1(dbglvl, "No vol on dev %s\n", dev->print_name());
567 vol_list->remove(vol);
568 Dmsg2(dbglvl, "=== free_volume %s dev=%s\n", vol->vol_name, dev->print_name());
570 debug_list_volumes("free_volume");
572 // return vol != NULL;
577 /* Create the Volume list */
578 void create_volume_list()
581 if (vol_list == NULL) {
582 vol_list = New(dlist(vol, &vol->link));
586 /* Release all Volumes from the list */
587 void free_volume_list()
594 foreach_dlist(vol, vol_list) {
596 Dmsg2(dbglvl, "free vol_list Volume=%s dev=%s\n", vol->vol_name, vol->dev->print_name());
598 Dmsg1(dbglvl, "free vol_list Volume=%s No dev\n", vol->vol_name);
601 vol->vol_name = NULL;
608 bool is_volume_in_use(DCR *dcr)
614 vol = find_volume(dcr);
616 Dmsg1(dbglvl, "Vol=%s not in use.\n", dcr->VolumeName);
617 goto get_out; /* vol not in list */
619 ASSERT(vol->dev != NULL);
621 if (dcr->dev == vol->dev) { /* same device OK */
622 Dmsg1(dbglvl, "Vol=%s on same dev.\n", dcr->VolumeName);
625 Dmsg3(dbglvl, "Vol=%s on %s we have %s\n", dcr->VolumeName,
626 vol->dev->print_name(), dcr->dev->print_name());
628 if (!vol->dev->is_busy()) {
629 Dmsg2(dbglvl, "Vol=%s dev=%s not busy.\n", dcr->VolumeName, vol->dev->print_name());
632 Dmsg2(dbglvl, "Vol=%s dev=%s busy.\n", dcr->VolumeName, vol->dev->print_name());
634 Dmsg2(dbglvl, "Vol=%s in use by %s.\n", dcr->VolumeName, vol->dev->print_name());
645 * We get the following type of information:
647 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
651 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
655 static bool use_storage_cmd(JCR *jcr)
657 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
658 BSOCK *dir = jcr->dir_bsock;
666 memset(&rctx, 0, sizeof(RCTX));
669 * If there are multiple devices, the director sends us
670 * use_device for each device that it wants to use.
672 dirstore = New(alist(10, not_owned_by_alist));
673 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
675 Dmsg1(dbglvl, "<dird: %s", dir->msg);
676 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
677 media_type.c_str(), pool_name.c_str(),
678 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
683 jcr->write_store = dirstore;
685 jcr->read_store = dirstore;
687 rctx.append = append;
688 unbash_spaces(store_name);
689 unbash_spaces(media_type);
690 unbash_spaces(pool_name);
691 unbash_spaces(pool_type);
692 store = new DIRSTORE;
693 dirstore->append(store);
694 memset(store, 0, sizeof(DIRSTORE));
695 store->device = New(alist(10));
696 bstrncpy(store->name, store_name, sizeof(store->name));
697 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
698 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
699 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
700 store->append = append;
702 /* Now get all devices */
703 while (dir->recv() >= 0) {
704 Dmsg1(dbglvl, "<dird device: %s", dir->msg);
705 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
709 unbash_spaces(dev_name);
710 store->device->append(bstrdup(dev_name.c_str()));
712 } while (ok && dir->recv() >= 0);
714 /* Developer debug code */
716 if (debug_level >= dbglvl) {
717 foreach_alist(store, dirstore) {
718 Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
719 store->name, store->media_type, store->pool_name,
720 store->pool_type, store->append);
721 foreach_alist(device_name, store->device) {
722 Dmsg1(dbglvl, " Device=%s\n", device_name);
727 init_jcr_device_wait_timers(jcr);
728 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
730 BSOCK *dir = jcr->dir_bsock;
731 dir->fsend(_("3939 Could not get dcr\n"));
732 Dmsg1(dbglvl, ">dird: %s", dir->msg);
736 * At this point, we have a list of all the Director's Storage
737 * resources indicated for this Job, which include Pool, PoolType,
738 * storage name, and Media type.
739 * Then for each of the Storage resources, we have a list of
740 * device names that were given.
742 * Wiffle through them and find one that can do the backup.
745 int wait_for_device_retries = 0;
748 rctx.notify_dir = true;
751 for ( ; !fail && !job_canceled(jcr); ) {
752 pop_reserve_messages(jcr);
753 rctx.suitable_device = false;
754 rctx.have_volume = false;
755 rctx.VolumeName[0] = 0;
756 rctx.any_drive = false;
757 if (!jcr->PreferMountedVols) {
759 * Here we try to find a drive that is not used.
760 * This will maximize the use of available drives.
763 rctx.num_writers = 20000000; /* start with impossible number */
764 rctx.low_use_drive = NULL;
765 rctx.PreferMountedVols = false;
766 rctx.exact_match = false;
767 rctx.autochanger_only = true;
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))) {
774 /* Look through all drives possibly for low_use drive */
775 if (rctx.low_use_drive) {
776 rctx.try_low_use_drive = true;
777 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
780 rctx.try_low_use_drive = false;
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))) {
791 * Now we look for a drive that may or may not be in
794 /* Look for an exact Volume match all drives */
795 rctx.PreferMountedVols = true;
796 rctx.exact_match = true;
797 rctx.autochanger_only = false;
798 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
799 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
800 rctx.autochanger_only, rctx.any_drive);
801 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
804 /* Look for any mounted drive */
805 rctx.exact_match = false;
806 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
807 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
808 rctx.autochanger_only, rctx.any_drive);
809 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
813 rctx.any_drive = true;
814 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
815 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
816 rctx.autochanger_only, rctx.any_drive);
817 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
820 /* Keep reservations locked *except* during wait_for_device() */
821 unlock_reservations();
823 * The idea of looping on repeat a few times it to ensure
824 * that if there is some subtle timing problem between two
825 * jobs, we will simply try again, and most likely succeed.
826 * This can happen if one job reserves a drive or finishes using
827 * a drive at the same time a second job wants it.
829 if (repeat++ > 1) { /* try algorithm 3 times */
830 bmicrosleep(30, 0); /* wait a bit */
831 Dmsg0(dbglvl, "repeat reserve algorithm\n");
832 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
833 Dmsg0(dbglvl, "Fail. !suitable_device || !wait_for_device\n");
837 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
839 unlock_reservations();
842 * If we get here, there are no suitable devices available, which
843 * means nothing configured. If a device is suitable but busy
844 * with another Volume, we will not come here.
846 unbash_spaces(dir->msg);
847 pm_strcpy(jcr->errmsg, dir->msg);
848 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
849 Jmsg(jcr, M_FATAL, 0, _("\n"
850 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
851 dev_name.c_str(), media_type.c_str());
852 dir->fsend(NO_device, dev_name.c_str());
854 Dmsg1(dbglvl, ">dird: %s", dir->msg);
857 unbash_spaces(dir->msg);
858 pm_strcpy(jcr->errmsg, dir->msg);
859 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
860 dir->fsend(BAD_use, jcr->errmsg);
861 Dmsg1(dbglvl, ">dird: %s", dir->msg);
864 release_reserve_messages(jcr);
870 * Walk through the autochanger resources and check if
871 * the volume is in one of them.
873 * Returns: true if volume is in device
876 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
878 AUTOCHANGER *changer = vol->dev->device->changer_res;
880 /* Find resource, and make sure we were able to open it */
881 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
882 Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
885 Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
890 * Search for a device suitable for this job.
891 * Note, this routine sets sets rctx.suitable_device if any
892 * device exists within the SD. The device may not be actually
894 * It also returns if it finds a useable device.
896 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
905 dirstore = jcr->write_store;
907 dirstore = jcr->read_store;
909 Dmsg4(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d\n",
910 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
911 rctx.autochanger_only);
914 * If the appropriate conditions of this if are met, namely that
915 * we are appending and the user wants mounted drive (or we
916 * force try a mounted drive because they are all busy), we
917 * start by looking at all the Volumes in the volume list.
919 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
920 dlist *temp_vol_list, *save_vol_list;
923 Dmsg0(dbglvl, "lock volumes\n");
926 * Create a temporary copy of the volume list. We do this,
927 * to avoid having the volume list locked during the
928 * call to reserve_device(), which would cause a deadlock.
929 * Note, we may want to add an update counter on the vol_list
930 * so that if it is modified while we are traversing the copy
931 * we can take note and act accordingly (probably redo the
932 * search at least a few times).
934 Dmsg0(dbglvl, "duplicate vol list\n");
935 temp_vol_list = New(dlist(vol, &vol->link));
936 foreach_dlist(vol, vol_list) {
938 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
939 memset(tvol, 0, sizeof(VOLRES));
940 tvol->vol_name = bstrdup(vol->vol_name);
941 tvol->dev = vol->dev;
942 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
944 tvol->dev = NULL; /* don't zap dev entry */
946 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
947 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
950 Dmsg0(dbglvl, "unlock volumes\n");
953 /* Look through reserved volumes for one we can use */
954 Dmsg0(dbglvl, "look for vol in vol list\n");
955 foreach_dlist(vol, temp_vol_list) {
957 Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
960 /* Check with Director if this Volume is OK */
961 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
962 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
966 Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
967 foreach_alist(store, dirstore) {
970 foreach_alist(device_name, store->device) {
971 /* Found a device, try to use it */
972 rctx.device_name = device_name;
973 rctx.device = vol->dev->device;
975 if (vol->dev->is_autochanger()) {
976 Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
977 if (!is_vol_in_autochanger(rctx, vol)) {
980 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
981 Dmsg2(dbglvl, "device=%s not suitable want %s\n",
982 vol->dev->device->hdr.name, device_name);
986 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
987 rctx.have_volume = true;
988 /* Try reserving this device and volume */
989 Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
990 stat = reserve_device(rctx);
991 if (stat == 1) { /* found available device */
992 Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
995 } else if (stat == 0) { /* device busy */
996 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
998 /* otherwise error */
999 Dmsg0(dbglvl, "No suitable device found.\n");
1001 rctx.have_volume = false;
1002 rctx.VolumeName[0] = 0;
1011 } /* end for loop over reserved volumes */
1013 Dmsg0(dbglvl, "lock volumes\n");
1015 save_vol_list = vol_list;
1016 vol_list = temp_vol_list;
1017 free_volume_list(); /* release temp_vol_list */
1018 vol_list = save_vol_list;
1019 Dmsg0(dbglvl, "deleted temp vol list\n");
1020 Dmsg0(dbglvl, "unlock volumes\n");
1022 debug_list_volumes("=== After free temp table\n");
1025 Dmsg1(dbglvl, "Usable dev found. Vol=%s from in-use vols list\n", rctx.VolumeName);
1030 * No reserved volume we can use, so now search for an available device.
1032 * For each storage device that the user specified, we
1033 * search and see if there is a resource for that device.
1035 foreach_alist(store, dirstore) {
1037 foreach_alist(device_name, store->device) {
1039 rctx.device_name = device_name;
1040 stat = search_res_for_device(rctx);
1041 if (stat == 1) { /* found available device */
1042 Dmsg1(dbglvl, "available device found=%s\n", device_name);
1045 } else if (stat == 0) { /* device busy */
1046 Dmsg1(dbglvl, "No usable device=%s, busy: not use\n", device_name);
1048 /* otherwise error */
1049 Dmsg0(dbglvl, "No usable device found.\n");
1057 Dmsg1(dbglvl, "Usable dev found. Vol=%s\n", rctx.VolumeName);
1063 * Search for a particular storage device with particular storage
1064 * characteristics (MediaType).
1066 int search_res_for_device(RCTX &rctx)
1068 AUTOCHANGER *changer;
1071 Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
1072 /* Look through Autochangers first */
1073 foreach_res(changer, R_AUTOCHANGER) {
1074 Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
1075 /* Find resource, and make sure we were able to open it */
1076 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1077 /* Try each device in this AutoChanger */
1078 foreach_alist(rctx.device, changer->device) {
1079 Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
1080 stat = reserve_device(rctx);
1081 if (stat != 1) { /* try another device */
1085 if (rctx.store->append == SD_APPEND) {
1086 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1087 rctx.device->hdr.name, rctx.jcr->dcr->dev->reserved_device);
1089 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1090 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->reserved_device);
1097 /* Now if requested look through regular devices */
1098 if (!rctx.autochanger_only) {
1099 foreach_res(rctx.device, R_DEVICE) {
1100 Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
1101 /* Find resource, and make sure we were able to open it */
1102 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1103 stat = reserve_device(rctx);
1104 if (stat != 1) { /* try another device */
1108 if (rctx.store->append == SD_APPEND) {
1109 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1110 rctx.device->hdr.name, rctx.jcr->dcr->dev->reserved_device);
1112 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1113 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->reserved_device);
1119 return -1; /* nothing found */
1123 * Try to reserve a specific device.
1125 * Returns: 1 -- OK, have DCR
1129 static int reserve_device(RCTX &rctx)
1133 const int name_len = MAX_NAME_LENGTH;
1135 /* Make sure MediaType is OK */
1136 Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
1137 rctx.device->media_type, rctx.store->media_type);
1138 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1142 /* Make sure device exists -- i.e. we can stat() it */
1143 if (!rctx.device->dev) {
1144 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1146 if (!rctx.device->dev) {
1147 if (rctx.device->changer_res) {
1148 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1149 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1150 rctx.device->hdr.name, rctx.device_name);
1152 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1153 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1156 return -1; /* no use waiting */
1159 rctx.suitable_device = true;
1160 Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
1161 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1163 BSOCK *dir = rctx.jcr->dir_bsock;
1164 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1165 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1168 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1169 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1170 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1171 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1172 if (rctx.store->append == SD_APPEND) {
1173 Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
1174 ok = reserve_device_for_append(dcr, rctx);
1179 rctx.jcr->dcr = dcr;
1180 Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1181 dcr->dev->reserved_device,
1182 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1183 Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
1184 rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
1185 if (rctx.have_volume) {
1186 Dmsg0(dbglvl, "Call reserve_volume\n");
1187 if (reserve_volume(dcr, rctx.VolumeName)) {
1188 Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
1190 Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
1194 dcr->any_volume = true;
1195 Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
1196 if (dir_find_next_appendable_volume(dcr)) {
1197 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1198 rctx.have_volume = true;
1199 Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
1201 Dmsg0(dbglvl, "No next volume found\n");
1202 rctx.have_volume = false;
1203 rctx.VolumeName[0] = 0;
1205 * If there is at least one volume that is valid and in use,
1206 * but we get here, check if we are running with prefers
1207 * non-mounted drives. In that case, we have selected a
1208 * non-used drive and our one and only volume is mounted
1209 * elsewhere, so we bail out and retry using that drive.
1211 if (dcr->volume_in_use && !rctx.PreferMountedVols) {
1212 rctx.PreferMountedVols = true;
1213 if (dcr->VolumeName[0]) {
1214 unreserve_device(dcr);
1219 * Note. Under some circumstances, the Director can hand us
1220 * a Volume name that is not the same as the one on the current
1221 * drive, and in that case, the call above to find the next
1222 * volume will fail because in attempting to reserve the Volume
1223 * the code will realize that we already have a tape mounted,
1224 * and it will fail. This *should* only happen if there are
1225 * writers, thus the following test. In that case, we simply
1226 * bail out, and continue waiting, rather than plunging on
1227 * and hoping that the operator can resolve the problem.
1229 if (dcr->dev->num_writers != 0) {
1230 if (dcr->VolumeName[0]) {
1231 unreserve_device(dcr);
1238 ok = reserve_device_for_read(dcr);
1240 rctx.jcr->read_dcr = dcr;
1241 Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1242 dcr->dev->reserved_device,
1243 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1250 if (rctx.notify_dir) {
1252 BSOCK *dir = rctx.jcr->dir_bsock;
1253 pm_strcpy(dev_name, rctx.device->hdr.name);
1254 bash_spaces(dev_name);
1255 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1256 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1263 rctx.have_volume = false;
1264 rctx.VolumeName[0] = 0;
1265 Dmsg0(dbglvl, "Not OK.\n");
1270 * We "reserve" the drive by setting the ST_READ bit. No one else
1271 * should touch the drive until that is cleared.
1272 * This allows the DIR to "reserve" the device before actually
1275 static bool reserve_device_for_read(DCR *dcr)
1277 DEVICE *dev = dcr->dev;
1278 JCR *jcr = dcr->jcr;
1285 if (is_device_unmounted(dev)) {
1286 Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
1287 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1288 jcr->JobId, dev->print_name());
1289 queue_reserve_message(jcr);
1293 if (dev->is_busy()) {
1294 Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1296 dev->state & ST_READ?1:0, dev->num_writers, dev->reserved_device);
1297 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1298 jcr->JobId, dev->print_name());
1299 queue_reserve_message(jcr);
1303 dev->clear_append();
1306 dev->reserved_device++;
1307 Dmsg3(dbglvl, "Inc reserve=%d dev=%s %p\n", dev->reserved_device, dev->print_name(), dev);
1308 dcr->reserved_device = true;
1317 * We reserve the device for appending by incrementing the
1318 * reserved_device. We do virtually all the same work that
1319 * is done in acquire_device_for_append(), but we do
1320 * not attempt to mount the device. This routine allows
1321 * the DIR to reserve multiple devices before *really*
1322 * starting the job. It also permits the SD to refuse
1323 * certain devices (not up, ...).
1325 * Note, in reserving a device, if the device is for the
1326 * same pool and the same pool type, then it is acceptable.
1327 * The Media Type has already been checked. If we are
1328 * the first tor reserve the device, we put the pool
1329 * name and pool type in the device record.
1331 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1333 JCR *jcr = dcr->jcr;
1334 DEVICE *dev = dcr->dev;
1341 /* If device is being read, we cannot write it */
1342 if (dev->can_read()) {
1343 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1344 jcr->JobId, dev->print_name());
1345 Dmsg1(dbglvl, "%s", jcr->errmsg);
1346 queue_reserve_message(jcr);
1350 /* If device is unmounted, we are out of luck */
1351 if (is_device_unmounted(dev)) {
1352 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1353 jcr->JobId, dev->print_name());
1354 Dmsg1(dbglvl, "%s", jcr->errmsg);
1355 queue_reserve_message(jcr);
1359 Dmsg1(dbglvl, "reserve_append device is %s\n", dev->print_name());
1361 /* Now do detailed tests ... */
1362 if (can_reserve_drive(dcr, rctx) != 1) {
1363 Dmsg0(dbglvl, "can_reserve_drive!=1\n");
1367 dev->reserved_device++;
1368 Dmsg3(dbglvl, "Inc reserve=%d dev=%s %p\n", 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 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1434 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1435 rctx.autochanger_only, rctx.any_drive);
1437 /* Check for max jobs on this Volume */
1438 if (!is_max_jobs_ok(dcr)) {
1442 /* setting any_drive overrides PreferMountedVols flag */
1443 if (!rctx.any_drive) {
1445 * When PreferMountedVols is set, we keep track of the
1446 * drive in use that has the least number of writers, then if
1447 * no unmounted drive is found, we try that drive. This
1448 * helps spread the load to the least used drives.
1450 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1451 Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
1452 dev->print_name(), rctx.low_use_drive->print_name());
1455 /* If he wants a free drive, but this one is busy, no go */
1456 if (!rctx.PreferMountedVols && dev->is_busy()) {
1457 /* Save least used drive */
1458 if ((dev->num_writers + dev->reserved_device) < rctx.num_writers) {
1459 rctx.num_writers = dev->num_writers + dev->reserved_device;
1460 rctx.low_use_drive = dev;
1461 Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
1462 dev->print_name(), rctx.num_writers);
1464 Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->reserved_device);
1466 Dmsg0(dbglvl, "failed: !prefMnt && busy.\n");
1467 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1468 jcr->JobId, dev->print_name());
1469 queue_reserve_message(jcr);
1473 /* Check for prefer mounted volumes */
1474 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1475 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1476 jcr->JobId, dev->print_name());
1477 queue_reserve_message(jcr);
1478 Dmsg0(dbglvl, "failed: want mounted -- no vol\n");
1479 return 0; /* No volume mounted */
1482 /* Check for exact Volume name match */
1483 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1486 if (rctx.exact_match && rctx.have_volume) {
1488 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1489 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1490 rctx.autochanger_only, rctx.any_drive);
1491 Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
1492 rctx.have_volume, dev->VolHdr.VolumeName,
1493 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1494 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1495 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1497 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1498 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1500 queue_reserve_message(jcr);
1501 Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
1502 dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1505 if (is_volume_in_use(dcr)) {
1506 return 0; /* fail if volume on another drive */
1511 /* Check for unused autochanger drive */
1512 if (rctx.autochanger_only && !dev->is_busy() &&
1513 dev->VolHdr.VolumeName[0] == 0) {
1514 /* Device is available but not yet reserved, reserve it for us */
1515 Dmsg1(dbglvl, "OK Res Unused autochanger %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 * Handle the case that there are no writers
1524 if (dev->num_writers == 0) {
1525 /* Now check if there are any reservations on the drive */
1526 if (dev->reserved_device) {
1527 return is_pool_ok(dcr);
1528 } else if (dev->can_append()) {
1529 if (is_pool_ok(dcr)) {
1532 /* Changing pool, unload old tape if any in drive */
1533 Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
1534 unload_autochanger(dcr, 0);
1537 /* Device is available but not yet reserved, reserve it for us */
1538 Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
1539 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1540 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1541 return 1; /* reserve drive */
1545 * Check if the device is in append mode with writers (i.e.
1546 * available if pool is the same).
1548 if (dev->can_append() || dev->num_writers > 0) {
1549 return is_pool_ok(dcr);
1551 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1552 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1553 jcr->JobId, dev->print_name());
1554 queue_reserve_message(jcr);
1555 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1556 return -1; /* error, should not get here */
1558 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1559 jcr->JobId, dev->print_name());
1560 queue_reserve_message(jcr);
1561 Dmsg1(dbglvl, "failed: No reserve %s\n", dev->print_name());
1569 * Queue a reservation error or failure message for this jcr
1571 static void queue_reserve_message(JCR *jcr)
1579 msgs = jcr->reserve_msgs;
1584 * Look for duplicate message. If found, do
1587 for (i=msgs->size()-1; i >= 0; i--) {
1588 msg = (char *)msgs->get(i);
1592 /* Comparison based on 4 digit message number */
1593 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1597 /* Message unique, so insert it */
1598 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1605 * Send any reservation messages queued for this jcr
1607 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1614 msgs = jcr->reserve_msgs;
1615 if (!msgs || msgs->size() == 0) {
1618 for (i=msgs->size()-1; i >= 0; i--) {
1619 msg = (char *)msgs->get(i);
1621 sendit(" ", 3, arg);
1622 sendit(msg, strlen(msg), arg);
1633 * Pop and release any reservations messages
1635 static void pop_reserve_messages(JCR *jcr)
1641 msgs = jcr->reserve_msgs;
1645 while ((msg = (char *)msgs->pop())) {
1653 * Also called from acquire.c
1655 void release_reserve_messages(JCR *jcr)
1657 pop_reserve_messages(jcr);
1659 if (!jcr->reserve_msgs) {
1662 delete jcr->reserve_msgs;
1663 jcr->reserve_msgs = NULL;