2 Bacula® - The Network Backup Solution
4 Copyright (C) 2000-2007 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);
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 void init_reservations_lock()
90 if ((errstat=rwl_init(&reservation_lock)) != 0) {
92 Emsg1(M_ABORT, 0, _("Unable to initialize reservation lock. ERR=%s\n"),
93 be.bstrerror(errstat));
96 if ((errstat=rwl_init(&vol_list_lock)) != 0) {
98 Emsg1(M_ABORT, 0, _("Unable to initialize volume list lock. ERR=%s\n"),
99 be.bstrerror(errstat));
103 void term_reservations_lock()
105 rwl_destroy(&reservation_lock);
106 rwl_destroy(&vol_list_lock);
109 int reservations_lock_count = 0;
111 /* This applies to a drive and to Volumes */
112 void _lock_reservations()
115 reservations_lock_count++;
116 if ((errstat=rwl_writelock(&reservation_lock)) != 0) {
118 Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
119 errstat, be.bstrerror(errstat));
123 void _unlock_reservations()
126 reservations_lock_count--;
127 if ((errstat=rwl_writeunlock(&reservation_lock)) != 0) {
129 Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
130 errstat, be.bstrerror(errstat));
134 int vol_list_lock_count = 0;
139 vol_list_lock_count++;
140 if ((errstat=rwl_writelock(&vol_list_lock)) != 0) {
142 Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
143 errstat, be.bstrerror(errstat));
147 void _unlock_volumes()
150 vol_list_lock_count--;
151 if ((errstat=rwl_writeunlock(&vol_list_lock)) != 0) {
153 Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
154 errstat, be.bstrerror(errstat));
160 * List Volumes -- this should be moved to status.c
167 static void debug_list_volumes(const char *imsg)
170 POOL_MEM msg(PM_MESSAGE);
173 foreach_dlist(vol, vol_list) {
175 Mmsg(msg, "List from %s: %s at %p on device %s\n", imsg,
176 vol->vol_name, vol->vol_name, vol->dev->print_name());
178 Mmsg(msg, "List from %s: %s at %p no dev\n", imsg, vol->vol_name, vol->vol_name);
180 Dmsg2(dbglvl, "jid=%u %s", jid(), msg.c_str());
185 foreach_dlist(vol, vol_list) {
186 if (vol->dev == dev) {
187 Dmsg0(000, "Two Volumes on same device.\n");
194 // Dmsg2(dbglvl, "List from %s: %d volumes\n", imsg, count);
200 * List Volumes -- this should be moved to status.c
202 void list_volumes(void sendit(const char *msg, int len, void *sarg), void *arg)
205 POOL_MEM msg(PM_MESSAGE);
209 foreach_dlist(vol, vol_list) {
210 DEVICE *dev = vol->dev;
212 len = Mmsg(msg, "%s on device %s\n", vol->vol_name, dev->print_name());
213 sendit(msg.c_str(), len, arg);
214 len = Mmsg(msg, " Reader=%d writers=%d reserved=%d\n", dev->can_read()?1:0,
215 dev->num_writers, dev->reserved_device);
216 sendit(msg.c_str(), len, arg);
218 len = Mmsg(msg, "%s no dev\n", vol->vol_name);
219 sendit(msg.c_str(), len, arg);
226 * Create a Volume item to put in the Volume list
227 * Ensure that the device points to it.
229 static VOLRES *new_vol_item(DCR *dcr, const char *VolumeName)
232 vol = (VOLRES *)malloc(sizeof(VOLRES));
233 memset(vol, 0, sizeof(VOLRES));
234 vol->vol_name = bstrdup(VolumeName);
236 Dmsg4(dbglvl, "jid=%u new Vol=%s at %p dev=%s\n", (int)dcr->jcr->JobId,
237 VolumeName, vol->vol_name, vol->dev->print_name());
241 static void free_vol_item(VOLRES *vol)
245 vol->dev->vol = NULL;
252 * Put a new Volume entry in the Volume list. This
253 * effectively reserves the volume so that it will
254 * not be mounted again.
256 * If the device has any current volume associated with it,
257 * and it is a different Volume, and the device is not busy,
258 * we release the old Volume item and insert the new one.
260 * It is assumed that the device is free and locked so that
261 * we can change the device structure.
263 * Some details of the Volume list handling:
265 * 1. The Volume list entry must be attached to the drive (rather than
266 * attached to a job as it currently is. I.e. the drive that "owns"
267 * the volume (reserved, in use, mounted)
268 * must point to the volume (still to be maintained in a list).
270 * 2. The Volume is entered in the list when a drive is reserved.
272 * 3. When a drive is in use, the device code must appropriately update the
273 * volume name as it changes (currently the list is static -- an entry is
274 * removed when the Volume is no longer reserved, in use or mounted).
275 * The new code must keep the same list entry as long as the drive
276 * has any volume associated with it but the volume name in the list
277 * must be updated when the drive has a different volume mounted.
279 * 4. A job that has reserved a volume, can un-reserve the volume, and if the
280 * volume is not mounted, and not reserved, and not in use, it will be
281 * removed from the list.
283 * 5. If a job wants to reserve a drive with a different Volume from the one on
284 * the drive, it can re-use the drive for the new Volume.
286 * 6. If a job wants a Volume that is in a different drive, it can either use the
287 * other drive or take the volume, only if the other drive is not in use or
290 * One nice aspect of this is that the reserve use count and the writer use count
291 * already exist and are correctly programmed and will need no changes -- use
292 * counts are always very tricky.
294 * The old code had a concept of "reserving" a Volume, but it needs to be changed
295 * to reserving and using a drive. A volume is must be attached to (owned by) a
296 * drive and can move from drive to drive or be unused given certain specific
297 * conditions of the drive. The key is that the drive must "own" the Volume.
298 * The old code has the job (dcr) owning the volume (more or less). The job is
299 * to change the insertion and removal of the volumes from the list to be based
300 * on the drive rather than the job.
302 * Return: VOLRES entry on success
303 * NULL volume busy on another drive
305 VOLRES *reserve_volume(DCR *dcr, const char *VolumeName)
308 DEVICE *dev = dcr->dev;
312 Dmsg2(dbglvl, "jid=%u reserve_volume %s\n", jid(), VolumeName);
314 * We lock the reservations system here to ensure
315 * when adding a new volume that no newly scheduled
316 * job can reserve it.
319 debug_list_volumes("begin reserve_volume");
321 * First, remove any old volume attached to this device as it
327 * Make sure we don't remove the current volume we are inserting
328 * because it was probably inserted by another job.
330 if (strcmp(vol->vol_name, VolumeName) == 0) {
331 goto get_out; /* Volume already on this device */
333 Dmsg3(dbglvl, "jid=%u reserve_vol free vol=%s at %p\n",
334 (int)dcr->jcr->JobId, vol->vol_name, vol->vol_name);
335 debug_list_volumes("reserve_vol free");
336 vol_list->remove(vol);
341 /* Create a new Volume entry */
342 nvol = new_vol_item(dcr, VolumeName);
345 * Now try to insert the new Volume
347 vol = (VOLRES *)vol_list->binary_insert(nvol, my_compare);
349 Dmsg3(dbglvl, "jid=%u Found vol=%s dev-same=%d\n", jid(), vol->vol_name, dev==vol->dev);
351 * At this point, a Volume with this name already is in the list,
352 * so we simply release our new Volume entry. Note, this should
353 * only happen if we are moving the volume from one drive to another.
355 Dmsg3(dbglvl, "jid=%u reserve_vol free-tmp vol=%s at %p\n",
356 (int)dcr->jcr->JobId, vol->vol_name, vol->vol_name);
358 * Clear dev pointer so that free_vol_item() doesn't
359 * take away our volume.
361 nvol->dev = NULL; /* don't zap dev entry */
364 /* Check if we are trying to use the Volume on a different drive */
365 if (dev != vol->dev) {
366 /* Caller wants to switch Volume to another device */
367 if (!vol->dev->is_busy()) {
368 /* OK to move it -- I'm not sure this will work */
369 Dmsg4(dbglvl, "==== jid=%u Swap vol=%s from dev=%s to %s\n", jid(), VolumeName,
370 vol->dev->print_name(), dev->print_name());
371 vol->dev->vol = NULL; /* take vol from old drive */
372 vol->dev->VolHdr.VolumeName[0] = 0;
373 vol->dev = dev; /* point vol at new drive */
374 dev->vol = vol; /* point dev at vol */
375 dev->VolHdr.VolumeName[0] = 0;
377 Dmsg4(dbglvl, "jid=%u Volume busy could not swap vol=%s from dev=%s to %s\n",
378 jid(), VolumeName, vol->dev->print_name(), dev->print_name());
379 vol = NULL; /* device busy */
386 debug_list_volumes("end new volume");
392 * Search for a Volume name in the Volume list.
394 * Returns: VOLRES entry on success
395 * NULL if the Volume is not in the list
397 VOLRES *find_volume(DCR *dcr)
400 /* Do not lock reservations here */
402 vol.vol_name = bstrdup(dcr->VolumeName);
403 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
405 Dmsg3(dbglvl, "jid=%u find_vol=%s found=%d\n", jid(), dcr->VolumeName, fvol!=NULL);
406 debug_list_volumes("find_volume");
412 * Remove any reservation from a drive and tell the system
413 * that the volume is unused at least by us.
415 void unreserve_device(DCR *dcr)
417 DEVICE *dev = dcr->dev;
419 if (dcr->reserved_device) {
420 dcr->reserved_device = false;
421 dev->reserved_device--;
422 Dmsg3(dbglvl, "jid=%u Dec reserve=%d dev=%s\n", jid(), dev->reserved_device, dev->print_name());
423 dcr->reserved_device = false;
424 /* If we set read mode in reserving, remove it */
425 if (dev->can_read()) {
428 if (dev->num_writers < 0) {
429 Jmsg1(dcr->jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
430 dev->num_writers = 0;
439 * Free a Volume from the Volume list if it is no longer used
441 * Returns: true if the Volume found and removed from the list
442 * false if the Volume is not in the list or is in use
444 bool volume_unused(DCR *dcr)
446 DEVICE *dev = dcr->dev;
448 if (dev->vol == NULL) {
449 Dmsg2(dbglvl, "jid=%u vol_unused: no vol on %s\n", (int)dcr->jcr->JobId, dev->print_name());
450 debug_list_volumes("null vol cannot unreserve_volume");
454 if (dev->is_busy()) {
455 Dmsg2(dbglvl, "jid=%u vol_unused: no vol on %s\n", (int)dcr->jcr->JobId, dev->print_name());
456 debug_list_volumes("dev busy cannot unreserve_volume");
461 * If this is a tape, we do not free the volume, rather we wait
462 * until the autoloader unloads it, or until another tape is
463 * explicitly read in this drive. This allows the SD to remember
464 * where the tapes are or last were.
466 if (dev->is_tape() || dev->is_autochanger()) {
469 return free_volume(dev);
474 * Unconditionally release the volume
476 bool free_volume(DEVICE *dev)
480 if (dev->vol == NULL) {
481 Dmsg2(dbglvl, "jid=%u No vol on dev %s\n", jid(), dev->print_name());
487 vol_list->remove(vol);
488 Dmsg3(dbglvl, "jid=%u free_volume %s dev=%s\n", jid(), vol->vol_name, dev->print_name());
490 debug_list_volumes("free_volume");
496 /* Create the Volume list */
497 void create_volume_list()
500 if (vol_list == NULL) {
501 vol_list = New(dlist(vol, &vol->link));
505 /* Release all Volumes from the list */
506 void free_volume_list()
513 foreach_dlist(vol, vol_list) {
515 Dmsg3(dbglvl, "jid=%u free vol_list Volume=%s dev=%s\n", jid(),
516 vol->vol_name, vol->dev->print_name());
518 Dmsg3(dbglvl, "jid=%u free vol_list Volume=%s dev=%p\n", jid(),
519 vol->vol_name, vol->dev);
522 vol->vol_name = NULL;
529 bool is_volume_in_use(DCR *dcr)
531 VOLRES *vol = find_volume(dcr);
533 Dmsg2(dbglvl, "jid=%u Vol=%s not in use.\n", jid(), dcr->VolumeName);
534 return false; /* vol not in list */
536 ASSERT(vol->dev != NULL);
538 if (dcr->dev == vol->dev) { /* same device OK */
539 Dmsg2(dbglvl, "jid=%u Vol=%s on same dev.\n", jid(), dcr->VolumeName);
542 Dmsg4(dbglvl, "jid=%u Vol=%s on %s we have %s\n", jid(), dcr->VolumeName,
543 vol->dev->print_name(), dcr->dev->print_name());
545 if (!vol->dev->is_busy()) {
546 Dmsg3(dbglvl, "jid=%u Vol=%s dev=%s not busy.\n", jid(), dcr->VolumeName, vol->dev->print_name());
549 Dmsg3(dbglvl, "jid=%u Vol=%s dev=%s busy.\n", jid(), dcr->VolumeName, vol->dev->print_name());
551 Dmsg3(dbglvl, "jid=%u Vol=%s in use by %s.\n", jid(), dcr->VolumeName, vol->dev->print_name());
557 * We get the following type of information:
559 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
563 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
567 static bool use_storage_cmd(JCR *jcr)
569 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
570 BSOCK *dir = jcr->dir_bsock;
580 memset(&rctx, 0, sizeof(RCTX));
583 * If there are multiple devices, the director sends us
584 * use_device for each device that it wants to use.
586 dirstore = New(alist(10, not_owned_by_alist));
587 msgs = jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
589 Dmsg2(dbglvl, "jid=%u <dird: %s", jid(), dir->msg);
590 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
591 media_type.c_str(), pool_name.c_str(),
592 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
597 jcr->write_store = dirstore;
599 jcr->read_store = dirstore;
601 rctx.append = append;
602 unbash_spaces(store_name);
603 unbash_spaces(media_type);
604 unbash_spaces(pool_name);
605 unbash_spaces(pool_type);
606 store = new DIRSTORE;
607 dirstore->append(store);
608 memset(store, 0, sizeof(DIRSTORE));
609 store->device = New(alist(10));
610 bstrncpy(store->name, store_name, sizeof(store->name));
611 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
612 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
613 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
614 store->append = append;
616 /* Now get all devices */
617 while (dir->recv() >= 0) {
618 Dmsg2(dbglvl, "jid=%u <dird device: %s", jid(), dir->msg);
619 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
623 unbash_spaces(dev_name);
624 store->device->append(bstrdup(dev_name.c_str()));
626 } while (ok && dir->recv() >= 0);
628 /* Developer debug code */
630 if (debug_level >= dbglvl) {
631 foreach_alist(store, dirstore) {
632 Dmsg6(dbglvl, "jid=%u Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
633 (int)rctx.jcr->JobId,
634 store->name, store->media_type, store->pool_name,
635 store->pool_type, store->append);
636 foreach_alist(device_name, store->device) {
637 Dmsg2(dbglvl, "jid=%u Device=%s\n", jid(), device_name);
642 init_jcr_device_wait_timers(jcr);
643 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
645 BSOCK *dir = jcr->dir_bsock;
646 dir->fsend(_("3939 Could not get dcr\n"));
647 Dmsg1(dbglvl, ">dird: %s", dir->msg);
651 * At this point, we have a list of all the Director's Storage
652 * resources indicated for this Job, which include Pool, PoolType,
653 * storage name, and Media type.
654 * Then for each of the Storage resources, we have a list of
655 * device names that were given.
657 * Wiffle through them and find one that can do the backup.
660 int wait_for_device_retries = 0;
663 rctx.notify_dir = true;
666 for ( ; !fail && !job_canceled(jcr); ) {
667 while ((msg = (char *)msgs->pop())) {
670 rctx.suitable_device = false;
671 rctx.have_volume = false;
672 rctx.VolumeName[0] = 0;
673 rctx.any_drive = false;
674 if (!jcr->PreferMountedVols) {
676 * Here we try to find a drive that is not used.
677 * This will maximize the use of available drives.
680 rctx.num_writers = 20000000; /* start with impossible number */
681 rctx.low_use_drive = NULL;
682 rctx.PreferMountedVols = false;
683 rctx.exact_match = false;
684 rctx.autochanger_only = true;
685 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
686 (int)rctx.jcr->JobId,
687 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
688 rctx.autochanger_only, rctx.any_drive);
689 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
692 /* Look through all drives possibly for low_use drive */
693 if (rctx.low_use_drive) {
694 rctx.try_low_use_drive = true;
695 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
698 rctx.try_low_use_drive = false;
700 rctx.autochanger_only = false;
701 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
702 (int)rctx.jcr->JobId,
703 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
704 rctx.autochanger_only, rctx.any_drive);
705 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
710 * Now we look for a drive that may or may not be in
713 /* Look for an exact Volume match all drives */
714 rctx.PreferMountedVols = true;
715 rctx.exact_match = true;
716 rctx.autochanger_only = false;
717 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
718 (int)rctx.jcr->JobId,
719 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
720 rctx.autochanger_only, rctx.any_drive);
721 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
724 /* Look for any mounted drive */
725 rctx.exact_match = false;
726 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
727 (int)rctx.jcr->JobId,
728 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
729 rctx.autochanger_only, rctx.any_drive);
730 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
734 rctx.any_drive = true;
735 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
736 (int)rctx.jcr->JobId,
737 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
738 rctx.autochanger_only, rctx.any_drive);
739 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
742 /* Keep reservations locked *except* during wait_for_device() */
743 unlock_reservations();
745 * The idea of looping on repeat a few times it to ensure
746 * that if there is some subtle timing problem between two
747 * jobs, we will simply try again, and most likely succeed.
748 * This can happen if one job reserves a drive or finishes using
749 * a drive at the same time a second job wants it.
751 if (repeat++ > 1) { /* try algorithm 3 times */
752 bmicrosleep(30, 0); /* wait a bit */
753 Dmsg1(dbglvl, "jid=%u repeat reserve algorithm\n", (int)rctx.jcr->JobId);
754 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
755 Dmsg1(dbglvl, "jid=%u Fail. !suitable_device || !wait_for_device\n",
756 (int)rctx.jcr->JobId);
760 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
762 unlock_reservations();
765 * If we get here, there are no suitable devices available, which
766 * means nothing configured. If a device is suitable but busy
767 * with another Volume, we will not come here.
769 unbash_spaces(dir->msg);
770 pm_strcpy(jcr->errmsg, dir->msg);
771 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
772 Jmsg(jcr, M_FATAL, 0, _("\n"
773 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
774 dev_name.c_str(), media_type.c_str());
775 dir->fsend(NO_device, dev_name.c_str());
777 Dmsg2(dbglvl, "jid=%u >dird: %s", jid(), dir->msg);
780 unbash_spaces(dir->msg);
781 pm_strcpy(jcr->errmsg, dir->msg);
782 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
783 dir->fsend(BAD_use, jcr->errmsg);
784 Dmsg2(dbglvl, "jid=%u >dird: %s", jid(), dir->msg);
791 void release_msgs(JCR *jcr)
793 alist *msgs = jcr->reserve_msgs;
800 while ((msg = (char *)msgs->pop())) {
804 jcr->reserve_msgs = NULL;
805 unlock_reservations();
809 * Walk through the autochanger resources and check if
810 * the volume is in one of them.
812 * Returns: true if volume is in device
815 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
817 AUTOCHANGER *changer = vol->dev->device->changer_res;
819 /* Find resource, and make sure we were able to open it */
820 if (fnmatch(rctx.device_name, changer->hdr.name, 0) == 0) {
821 Dmsg2(dbglvl, "jid=%u Found changer device %s\n",
822 (int)rctx.jcr->JobId, vol->dev->device->hdr.name);
825 Dmsg2(dbglvl, "jid=%u Incorrect changer device %s\n",
826 (int)rctx.jcr->JobId, changer->hdr.name);
831 * Search for a device suitable for this job.
833 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
842 dirstore = jcr->write_store;
844 dirstore = jcr->read_store;
846 Dmsg5(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d\n",
847 (int)rctx.jcr->JobId,
848 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
849 rctx.autochanger_only);
852 * If the appropriate conditions of this if are met, namely that
853 * we are appending and the user wants mounted drive (or we
854 * force try a mounted drive because they are all busy), we
855 * start by looking at all the Volumes in the volume list.
857 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
858 dlist *temp_vol_list, *save_vol_list;
863 * Create a temporary copy of the volume list. We do this,
864 * to avoid having the volume list locked during the
865 * call to reserve_device(), which would cause a deadlock.
866 * Note, we may want to add an update counter on the vol_list
867 * so that if it is modified while we are traversing the copy
868 * we can take note and act accordingly (probably redo the
869 * search at least a few times).
871 Dmsg1(dbglvl, "jid=%u duplicate vol list\n", (int)rctx.jcr->JobId);
872 temp_vol_list = New(dlist(vol, &vol->link));
873 foreach_dlist(vol, vol_list) {
875 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
876 memset(tvol, 0, sizeof(VOLRES));
877 tvol->vol_name = bstrdup(vol->vol_name);
878 tvol->dev = vol->dev;
879 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
881 tvol->dev = NULL; /* don't zap dev entry */
883 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
884 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
889 /* Look through reserved volumes for one we can use */
890 Dmsg1(dbglvl, "jid=%u look for vol in vol list\n", (int)rctx.jcr->JobId);
891 foreach_dlist(vol, temp_vol_list) {
893 Dmsg2(dbglvl, "jid=%u vol=%s no dev\n", (int)rctx.jcr->JobId, vol->vol_name);
896 /* Check with Director if this Volume is OK */
897 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
898 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
902 Dmsg2(dbglvl, "jid=%u vol=%s OK for this job\n", (int)rctx.jcr->JobId, vol->vol_name);
903 foreach_alist(store, dirstore) {
906 foreach_alist(device_name, store->device) {
907 /* Found a device, try to use it */
908 rctx.device_name = device_name;
909 rctx.device = vol->dev->device;
911 if (vol->dev->is_autochanger()) {
912 Dmsg2(dbglvl, "jid=%u vol=%s is in changer\n", (int)rctx.jcr->JobId,
914 if (!is_vol_in_autochanger(rctx, vol)) {
917 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
918 Dmsg3(dbglvl, "jid=%u device=%s not suitable want %s\n", (int)rctx.jcr->JobId,
919 vol->dev->device->hdr.name, device_name);
923 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
924 rctx.have_volume = true;
925 /* Try reserving this device and volume */
926 Dmsg3(dbglvl, "jid=%u try vol=%s on device=%s\n", (int)rctx.jcr->JobId,
927 rctx.VolumeName, device_name);
928 stat = reserve_device(rctx);
929 if (stat == 1) { /* found available device */
930 Dmsg2(dbglvl, "jid=%u Suitable device found=%s\n", (int)rctx.jcr->JobId,
934 } else if (stat == 0) { /* device busy */
935 Dmsg2(dbglvl, "jid=%u Suitable device=%s, busy: not use\n",
936 (int)rctx.jcr->JobId, device_name);
938 /* otherwise error */
939 Dmsg1(dbglvl, "jid=%u No suitable device found.\n", (int)rctx.jcr->JobId);
941 rctx.have_volume = false;
950 } /* end for loop over reserved volumes */
953 save_vol_list = vol_list;
954 vol_list = temp_vol_list;
955 free_volume_list(); /* release temp_vol_list */
956 vol_list = save_vol_list;
957 Dmsg1(dbglvl, "jid=%u deleted temp vol list\n", (int)rctx.jcr->JobId);
961 Dmsg2(dbglvl, "jid=%u got vol %s from in-use vols list\n", (int)rctx.jcr->JobId,
967 * No reserved volume we can use, so now search for an available device.
969 * For each storage device that the user specified, we
970 * search and see if there is a resource for that device.
972 foreach_alist(store, dirstore) {
974 foreach_alist(device_name, store->device) {
976 rctx.device_name = device_name;
977 stat = search_res_for_device(rctx);
978 if (stat == 1) { /* found available device */
979 Dmsg2(dbglvl, "jid=%u available device found=%s\n", (int)rctx.jcr->JobId,
983 } else if (stat == 0) { /* device busy */
984 Dmsg2(dbglvl, "jid=%u Suitable device=%s, busy: not use\n",
985 (int)rctx.jcr->JobId, device_name);
987 /* otherwise error */
988 Dmsg1(dbglvl, "jid=%u No suitable device found.\n", (int)rctx.jcr->JobId);
999 * Search for a particular storage device with particular storage
1000 * characteristics (MediaType).
1002 int search_res_for_device(RCTX &rctx)
1004 AUTOCHANGER *changer;
1007 Dmsg2(dbglvl, "jid=%u search res for %s\n", (int)rctx.jcr->JobId, rctx.device_name);
1008 /* Look through Autochangers first */
1009 foreach_res(changer, R_AUTOCHANGER) {
1010 Dmsg2(dbglvl, "jid=%u Try match changer res=%s\n", (int)rctx.jcr->JobId, changer->hdr.name);
1011 /* Find resource, and make sure we were able to open it */
1012 if (fnmatch(rctx.device_name, changer->hdr.name, 0) == 0) {
1013 /* Try each device in this AutoChanger */
1014 foreach_alist(rctx.device, changer->device) {
1015 Dmsg2(dbglvl, "jid=%u Try changer device %s\n", (int)rctx.jcr->JobId,
1016 rctx.device->hdr.name);
1017 stat = reserve_device(rctx);
1018 if (stat != 1) { /* try another device */
1022 if (rctx.store->append == SD_APPEND) {
1023 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for append.\n",
1024 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1025 rctx.jcr->dcr->dev->reserved_device);
1027 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for read.\n",
1028 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1029 rctx.jcr->read_dcr->dev->reserved_device);
1036 /* Now if requested look through regular devices */
1037 if (!rctx.autochanger_only) {
1038 foreach_res(rctx.device, R_DEVICE) {
1039 Dmsg2(dbglvl, "jid=%u Try match res=%s\n", (int)rctx.jcr->JobId, rctx.device->hdr.name);
1040 /* Find resource, and make sure we were able to open it */
1041 if (fnmatch(rctx.device_name, rctx.device->hdr.name, 0) == 0) {
1042 stat = reserve_device(rctx);
1043 if (stat != 1) { /* try another device */
1047 if (rctx.store->append == SD_APPEND) {
1048 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for append.\n",
1049 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1050 rctx.jcr->dcr->dev->reserved_device);
1052 Dmsg3(dbglvl, "jid=%u Device %s reserved=%d for read.\n",
1053 (int)rctx.jcr->JobId, rctx.device->hdr.name,
1054 rctx.jcr->read_dcr->dev->reserved_device);
1060 return -1; /* nothing found */
1064 * Try to reserve a specific device.
1066 * Returns: 1 -- OK, have DCR
1070 static int reserve_device(RCTX &rctx)
1074 const int name_len = MAX_NAME_LENGTH;
1076 /* Make sure MediaType is OK */
1077 Dmsg3(dbglvl, "jid=%u chk MediaType device=%s request=%s\n",
1078 (int)rctx.jcr->JobId,
1079 rctx.device->media_type, rctx.store->media_type);
1080 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1084 /* Make sure device exists -- i.e. we can stat() it */
1085 if (!rctx.device->dev) {
1086 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1088 if (!rctx.device->dev) {
1089 if (rctx.device->changer_res) {
1090 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1091 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1092 rctx.device->hdr.name, rctx.device_name);
1094 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1095 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1098 return -1; /* no use waiting */
1101 rctx.suitable_device = true;
1102 Dmsg2(dbglvl, "jid=%u try reserve %s\n", rctx.jcr->JobId, rctx.device->hdr.name);
1103 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1105 BSOCK *dir = rctx.jcr->dir_bsock;
1106 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1107 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1110 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1111 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1112 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1113 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1114 if (rctx.store->append == SD_APPEND) {
1115 Dmsg3(dbglvl, "jid=%u have_vol=%d vol=%s\n", (int)rctx.jcr->JobId,
1116 rctx.have_volume, rctx.VolumeName);
1117 ok = reserve_device_for_append(dcr, rctx);
1122 rctx.jcr->dcr = dcr;
1123 Dmsg6(dbglvl, "jid=%u Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1124 (int)rctx.jcr->JobId,
1125 dcr->dev->reserved_device,
1126 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1127 if (!rctx.have_volume) {
1128 dcr->any_volume = true;
1129 if (dir_find_next_appendable_volume(dcr)) {
1130 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1131 Dmsg2(dbglvl, "jid=%u looking for Volume=%s\n", (int)rctx.jcr->JobId, rctx.VolumeName);
1132 rctx.have_volume = true;
1134 Dmsg1(dbglvl, "jid=%u No next volume found\n", (int)rctx.jcr->JobId);
1135 rctx.have_volume = false;
1136 rctx.VolumeName[0] = 0;
1138 * If there is at least one volume that is valid and in use,
1139 * but we get here, check if we are running with prefers
1140 * non-mounted drives. In that case, we have selected a
1141 * non-used drive and our one and only volume is mounted
1142 * elsewhere, so we bail out and retry using that drive.
1144 if (dcr->volume_in_use && !rctx.PreferMountedVols) {
1145 rctx.PreferMountedVols = true;
1151 ok = reserve_device_for_read(dcr);
1153 rctx.jcr->read_dcr = dcr;
1154 Dmsg6(dbglvl, "jid=%u Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1155 (int)rctx.jcr->JobId,
1156 dcr->dev->reserved_device,
1157 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1163 if (rctx.notify_dir) {
1165 BSOCK *dir = rctx.jcr->dir_bsock;
1166 pm_strcpy(dev_name, rctx.device->hdr.name);
1167 bash_spaces(dev_name);
1168 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1169 Dmsg2(dbglvl, "jid=%u >dird changer: %s", jid(), dir->msg);
1176 rctx.have_volume = false;
1178 Dmsg1(dbglvl, "jid=%u Not OK.\n", (int)rctx.jcr->JobId);
1183 * We "reserve" the drive by setting the ST_READ bit. No one else
1184 * should touch the drive until that is cleared.
1185 * This allows the DIR to "reserve" the device before actually
1188 static bool reserve_device_for_read(DCR *dcr)
1190 DEVICE *dev = dcr->dev;
1191 JCR *jcr = dcr->jcr;
1198 if (is_device_unmounted(dev)) {
1199 Dmsg2(dbglvl, "jid=%u Device %s is BLOCKED due to user unmount.\n",
1200 (int)jcr->JobId, dev->print_name());
1201 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1202 jcr->JobId, dev->print_name());
1203 queue_reserve_message(jcr);
1207 if (dev->is_busy()) {
1208 Dmsg5(dbglvl, "jid=%u Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1209 (int)jcr->JobId, dev->print_name(),
1210 dev->state & ST_READ?1:0, dev->num_writers, dev->reserved_device);
1211 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1212 jcr->JobId, dev->print_name());
1213 queue_reserve_message(jcr);
1217 dev->clear_append();
1220 dev->reserved_device++;
1221 Dmsg4(dbglvl, "jid=%u Inc reserve=%d dev=%s %p\n", (int)jcr->JobId,
1222 dev->reserved_device, dev->print_name(), dev);
1223 dcr->reserved_device = true;
1232 * We reserve the device for appending by incrementing the
1233 * reserved_device. We do virtually all the same work that
1234 * is done in acquire_device_for_append(), but we do
1235 * not attempt to mount the device. This routine allows
1236 * the DIR to reserve multiple devices before *really*
1237 * starting the job. It also permits the SD to refuse
1238 * certain devices (not up, ...).
1240 * Note, in reserving a device, if the device is for the
1241 * same pool and the same pool type, then it is acceptable.
1242 * The Media Type has already been checked. If we are
1243 * the first tor reserve the device, we put the pool
1244 * name and pool type in the device record.
1246 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1248 JCR *jcr = dcr->jcr;
1249 DEVICE *dev = dcr->dev;
1256 /* If device is being read, we cannot write it */
1257 if (dev->can_read()) {
1258 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1259 jcr->JobId, dev->print_name());
1260 Dmsg2(dbglvl, "jid=%u %s", jid(), jcr->errmsg);
1261 queue_reserve_message(jcr);
1265 /* If device is unmounted, we are out of luck */
1266 if (is_device_unmounted(dev)) {
1267 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1268 jcr->JobId, dev->print_name());
1269 Dmsg2(dbglvl, "jid=%u %s", jid(), jcr->errmsg);
1270 queue_reserve_message(jcr);
1274 Dmsg2(dbglvl, "jid=%u reserve_append device is %s\n",
1275 (int)jcr->JobId, dev->print_name());
1277 /* Now do detailed tests ... */
1278 if (can_reserve_drive(dcr, rctx) != 1) {
1279 Dmsg1(dbglvl, "jid=%u can_reserve_drive!=1\n", (int)jcr->JobId);
1283 dev->reserved_device++;
1284 Dmsg4(dbglvl, "jid=%u Inc reserve=%d dev=%s %p\n", (int)jcr->JobId, dev->reserved_device,
1285 dev->print_name(), dev);
1286 dcr->reserved_device = true;
1295 * Returns: 1 if drive can be reserved
1296 * 0 if we should wait
1297 * -1 on error or impossibility
1299 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1301 DEVICE *dev = dcr->dev;
1302 JCR *jcr = dcr->jcr;
1304 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1306 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1307 rctx.autochanger_only, rctx.any_drive);
1309 /* setting any_drive overrides PreferMountedVols flag */
1310 if (!rctx.any_drive) {
1312 * When PreferMountedVols is set, we keep track of the
1313 * drive in use that has the least number of writers, then if
1314 * no unmounted drive is found, we try that drive. This
1315 * helps spread the load to the least used drives.
1317 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1318 Dmsg3(dbglvl, "jid=%u OK dev=%s == low_drive=%s.\n",
1319 jcr->JobId, dev->print_name(), rctx.low_use_drive->print_name());
1322 /* If he wants a free drive, but this one is busy, no go */
1323 if (!rctx.PreferMountedVols && dev->is_busy()) {
1324 /* Save least used drive */
1325 if ((dev->num_writers + dev->reserved_device) < rctx.num_writers) {
1326 rctx.num_writers = dev->num_writers + dev->reserved_device;
1327 rctx.low_use_drive = dev;
1328 Dmsg3(dbglvl, "jid=%u set low use drive=%s num_writers=%d\n",
1329 (int)jcr->JobId, dev->print_name(), rctx.num_writers);
1331 Dmsg2(dbglvl, "jid=%u not low use num_writers=%d\n",
1332 (int)jcr->JobId, dev->num_writers+dev->reserved_device);
1334 Dmsg1(dbglvl, "jid=%u failed: !prefMnt && busy.\n", jcr->JobId);
1335 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1336 jcr->JobId, dev->print_name());
1337 queue_reserve_message(jcr);
1341 /* Check for prefer mounted volumes */
1342 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1343 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1344 jcr->JobId, dev->print_name());
1345 queue_reserve_message(jcr);
1346 Dmsg1(dbglvl, "jid=%u failed: want mounted -- no vol\n", (uint32_t)jcr->JobId);
1347 return 0; /* No volume mounted */
1350 /* Check for exact Volume name match */
1351 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1354 if (rctx.exact_match && rctx.have_volume) {
1356 Dmsg6(dbglvl, "jid=%u PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1358 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1359 rctx.autochanger_only, rctx.any_drive);
1360 Dmsg5(dbglvl, "jid=%u have_vol=%d have=%s resvol=%s want=%s\n",
1361 (int)jcr->JobId, rctx.have_volume, dev->VolHdr.VolumeName,
1362 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1363 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1364 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1366 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1367 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1369 queue_reserve_message(jcr);
1370 Dmsg4(dbglvl, "jid=%u not OK: dev have=%s resvol=%s want=%s\n",
1371 (int)jcr->JobId, dev->VolHdr.VolumeName,
1372 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1375 if (is_volume_in_use(dcr)) {
1376 return 0; /* fail if volume on another drive */
1381 /* Check for unused autochanger drive */
1382 if (rctx.autochanger_only && !dev->is_busy() &&
1383 dev->VolHdr.VolumeName[0] == 0) {
1384 /* Device is available but not yet reserved, reserve it for us */
1385 Dmsg2(dbglvl, "jid=%u OK Res Unused autochanger %s.\n",
1386 jcr->JobId, dev->print_name());
1387 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1388 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1389 return 1; /* reserve drive */
1393 * Handle the case that there are no writers
1395 if (dev->num_writers == 0) {
1396 /* Now check if there are any reservations on the drive */
1397 if (dev->reserved_device) {
1398 /* Now check if we want the same Pool and pool type */
1399 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1400 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1401 /* OK, compatible device */
1402 Dmsg2(dbglvl, "jid=%u OK dev: %s num_writers=0, reserved, pool matches\n",
1403 jcr->JobId, dev->print_name());
1406 /* Drive Pool not suitable for us */
1407 Mmsg(jcr->errmsg, _(
1408 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1409 jcr->JobId, dcr->pool_name, dev->pool_name,
1410 dev->reserved_device, dev->print_name());
1411 queue_reserve_message(jcr);
1412 Dmsg3(dbglvl, "jid=%u failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1413 (int)jcr->JobId, dev->pool_name, dcr->pool_name);
1414 return 0; /* wait */
1416 } else if (dev->can_append()) {
1417 /* Device in append mode, check if changing pool */
1418 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1419 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1420 Dmsg2(dbglvl, "jid=%u OK dev: %s num_writers=0, can_append, pool matches.\n",
1421 jcr->JobId, dev->print_name());
1422 /* OK, compatible device */
1425 /* Changing pool, unload old tape if any in drive */
1426 Dmsg1(dbglvl, "jid=%u OK dev: num_writers=0, not reserved, pool change, unload changer\n",
1428 unload_autochanger(dcr, 0);
1431 /* Device is available but not yet reserved, reserve it for us */
1432 Dmsg2(dbglvl, "jid=%u OK Dev avail reserved %s\n", jcr->JobId, dev->print_name());
1433 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1434 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1435 return 1; /* reserve drive */
1439 * Check if the device is in append mode with writers (i.e.
1440 * available if pool is the same).
1442 if (dev->can_append() || dev->num_writers > 0) {
1443 /* Yes, now check if we want the same Pool and pool type */
1444 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1445 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1446 Dmsg2(dbglvl, "jid=%u OK dev: %s num_writers>=0, can_append, pool matches.\n",
1447 jcr->JobId, dev->print_name());
1448 /* OK, compatible device */
1451 /* Drive Pool not suitable for us */
1452 Mmsg(jcr->errmsg, _("3609 JobId=%u wants Pool=\"%s\" but has Pool=\"%s\" on drive %s.\n"),
1453 jcr->JobId, dcr->pool_name, dev->pool_name, dev->print_name());
1454 queue_reserve_message(jcr);
1455 Dmsg3(dbglvl, "jid=%u failed: busy num_writers>0, can_append, pool=%s wanted=%s\n",
1456 (int)jcr->JobId, dev->pool_name, dcr->pool_name);
1457 return 0; /* wait */
1460 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1461 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1462 jcr->JobId, dev->print_name());
1463 queue_reserve_message(jcr);
1464 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1465 return -1; /* error, should not get here */
1467 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1468 jcr->JobId, dev->print_name());
1469 queue_reserve_message(jcr);
1470 Dmsg2(dbglvl, "jid=%u failed: No reserve %s\n", jcr->JobId, dev->print_name());
1475 * search_lock is already set on entering this routine
1477 static void queue_reserve_message(JCR *jcr)
1480 alist *msgs = jcr->reserve_msgs;
1487 * Look for duplicate message. If found, do
1490 for (i=msgs->size()-1; i >= 0; i--) {
1491 msg = (char *)msgs->get(i);
1495 /* Comparison based on 4 digit message number */
1496 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1500 /* Message unique, so insert it */
1501 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1505 * Send any reservation messages queued for this jcr
1507 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1513 lock_reservations();
1514 msgs = jcr->reserve_msgs;
1515 if (!msgs || msgs->size() == 0) {
1518 for (i=msgs->size()-1; i >= 0; i--) {
1519 msg = (char *)msgs->get(i);
1521 sendit(" ", 3, arg);
1522 sendit(msg, strlen(msg), arg);
1529 unlock_reservations();