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 */
386 Dmsg2(dbglvl, "==== Swap from dev=%s to %s\n",
387 dev->print_name(), vol->dev->print_name());
388 switch_device(dcr, vol->dev);
390 bstrncpy(dcr->VolumeName, VolumeName, sizeof(dcr->VolumeName));
392 if (!vol->dev->is_busy()) {
393 /* OK to move it -- I'm not sure this will work */
394 Dmsg3(dbglvl, "==== Swap vol=%s from dev=%s to %s\n", VolumeName,
395 vol->dev->print_name(), dev->print_name());
396 vol->dev->vol = NULL; /* take vol from old drive */
397 vol->dev->VolHdr.VolumeName[0] = 0;
398 vol->dev = dev; /* point vol at new drive */
399 dev->vol = vol; /* point dev at vol */
400 dev->VolHdr.VolumeName[0] = 0;
402 Dmsg3(dbglvl, "==== Swap not possible Vol busy vol=%s from dev=%s to %s\n",
403 VolumeName, vol->dev->print_name(), dev->print_name());
404 vol = NULL; /* device busy */
414 Dmsg2(dbglvl, "=== set not released. vol=%s dev=%s\n", vol->vol_name,
415 vol->dev->print_name());
416 vol->released = false;
417 dcr->reserved_volume = true;
419 debug_list_volumes("end new volume");
425 * Switch from current device to given device
428 void switch_device(DCR *dcr, DEVICE *dev)
433 memcpy(&save_dcr, dcr, sizeof(save_dcr));
434 clean_device(dcr); /* clean up the dcr */
436 dcr->dev = dev; /* get new device pointer */
437 Jmsg(dcr->jcr, M_INFO, 0, _("Device switch. New device %s chosen.\n"),
438 dcr->dev->print_name());
440 bstrncpy(dcr->VolumeName, save_dcr.VolumeName, sizeof(dcr->VolumeName));
441 bstrncpy(dcr->media_type, save_dcr.media_type, sizeof(dcr->media_type));
442 dcr->VolCatInfo.Slot = save_dcr.VolCatInfo.Slot;
443 bstrncpy(dcr->pool_name, save_dcr.pool_name, sizeof(dcr->pool_name));
444 bstrncpy(dcr->pool_type, save_dcr.pool_type, sizeof(dcr->pool_type));
445 bstrncpy(dcr->dev_name, dev->dev_name, sizeof(dcr->dev_name));
447 dev->reserved_device++;
448 dcr->reserved_device = true;
454 * Search for a Volume name in the Volume list.
456 * Returns: VOLRES entry on success
457 * NULL if the Volume is not in the list
459 VOLRES *find_volume(DCR *dcr)
462 /* Do not lock reservations here */
464 vol.vol_name = bstrdup(dcr->VolumeName);
465 fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
467 Dmsg2(dbglvl, "find_vol=%s found=%d\n", dcr->VolumeName, fvol!=NULL);
468 debug_list_volumes("find_volume");
474 * Remove any reservation from a drive and tell the system
475 * that the volume is unused at least by us.
477 void unreserve_device(DCR *dcr)
479 DEVICE *dev = dcr->dev;
480 if (dcr->reserved_device) {
481 dcr->reserved_device = false;
482 dcr->reserved_volume = false;
483 dev->reserved_device--;
484 Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
485 /* If we set read mode in reserving, remove it */
486 if (dev->can_read()) {
489 if (dev->num_writers < 0) {
490 Jmsg1(dcr->jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
491 dev->num_writers = 0;
493 if (dev->reserved_device == 0 && dev->num_writers == 0) {
500 * Free a Volume from the Volume list if it is no longer used
501 * Note, for tape drives we want to remember where the Volume
502 * was when last used, so rather than free the volume entry,
503 * we simply mark it "released" so when the drive is really
504 * needed for another volume, we can reuse it.
506 * Returns: true if the Volume found and "removed" from the list
507 * false if the Volume is not in the list or is in use
509 bool volume_unused(DCR *dcr)
511 DEVICE *dev = dcr->dev;
513 if (dev->vol == NULL) {
514 Dmsg1(dbglvl, "vol_unused: no vol on %s\n", dev->print_name());
515 debug_list_volumes("null vol cannot unreserve_volume");
520 if (dev->is_busy()) {
521 Dmsg1(dbglvl, "vol_unused: busy on %s\n", dev->print_name());
522 debug_list_volumes("dev busy cannot unreserve_volume");
527 if (dev->num_writers > 0 || dev->reserved_device > 0) {
533 * If this is a tape, we do not free the volume, rather we wait
534 * until the autoloader unloads it, or until another tape is
535 * explicitly read in this drive. This allows the SD to remember
536 * where the tapes are or last were.
538 Dmsg3(dbglvl, "=== mark released vol=%s num_writers=%d dev_reserved=%d\n",
539 dev->vol->vol_name, dev->num_writers, dev->reserved_device);
540 dev->vol->released = true;
541 Dmsg2(dbglvl, "=== set released. Vol=%s dev=%s\n", dev->vol->vol_name,
543 if (dev->is_tape()) { // || dev->is_autochanger()) {
547 * Note, this frees the volume reservation entry, but the
548 * file descriptor remains open with the OS.
550 return free_volume(dev);
555 * Unconditionally release the volume entry
557 bool free_volume(DEVICE *dev)
561 if (dev->vol == NULL) {
562 Dmsg1(dbglvl, "No vol on dev %s\n", dev->print_name());
568 vol_list->remove(vol);
569 Dmsg2(dbglvl, "=== free_volume %s dev=%s\n", vol->vol_name, dev->print_name());
571 debug_list_volumes("free_volume");
573 // return vol != NULL;
578 /* Create the Volume list */
579 void create_volume_list()
582 if (vol_list == NULL) {
583 vol_list = New(dlist(vol, &vol->link));
587 /* Release all Volumes from the list */
588 void free_volume_list()
595 foreach_dlist(vol, vol_list) {
597 Dmsg2(dbglvl, "free vol_list Volume=%s dev=%s\n", vol->vol_name, vol->dev->print_name());
599 Dmsg1(dbglvl, "free vol_list Volume=%s No dev\n", vol->vol_name);
602 vol->vol_name = NULL;
609 bool is_volume_in_use(DCR *dcr)
615 vol = find_volume(dcr);
617 Dmsg1(dbglvl, "Vol=%s not in use.\n", dcr->VolumeName);
618 goto get_out; /* vol not in list */
620 ASSERT(vol->dev != NULL);
622 if (dcr->dev == vol->dev) { /* same device OK */
623 Dmsg1(dbglvl, "Vol=%s on same dev.\n", dcr->VolumeName);
626 Dmsg3(dbglvl, "Vol=%s on %s we have %s\n", dcr->VolumeName,
627 vol->dev->print_name(), dcr->dev->print_name());
629 if (!vol->dev->is_busy()) {
630 Dmsg2(dbglvl, "Vol=%s dev=%s not busy.\n", dcr->VolumeName, vol->dev->print_name());
633 Dmsg2(dbglvl, "Vol=%s dev=%s busy.\n", dcr->VolumeName, vol->dev->print_name());
635 Dmsg2(dbglvl, "Vol=%s in use by %s.\n", dcr->VolumeName, vol->dev->print_name());
646 * We get the following type of information:
648 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
652 * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
656 static bool use_storage_cmd(JCR *jcr)
658 POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
659 BSOCK *dir = jcr->dir_bsock;
667 memset(&rctx, 0, sizeof(RCTX));
670 * If there are multiple devices, the director sends us
671 * use_device for each device that it wants to use.
673 dirstore = New(alist(10, not_owned_by_alist));
674 jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
676 Dmsg1(dbglvl, "<dird: %s", dir->msg);
677 ok = sscanf(dir->msg, use_storage, store_name.c_str(),
678 media_type.c_str(), pool_name.c_str(),
679 pool_type.c_str(), &append, &Copy, &Stripe) == 7;
684 jcr->write_store = dirstore;
686 jcr->read_store = dirstore;
688 rctx.append = append;
689 unbash_spaces(store_name);
690 unbash_spaces(media_type);
691 unbash_spaces(pool_name);
692 unbash_spaces(pool_type);
693 store = new DIRSTORE;
694 dirstore->append(store);
695 memset(store, 0, sizeof(DIRSTORE));
696 store->device = New(alist(10));
697 bstrncpy(store->name, store_name, sizeof(store->name));
698 bstrncpy(store->media_type, media_type, sizeof(store->media_type));
699 bstrncpy(store->pool_name, pool_name, sizeof(store->pool_name));
700 bstrncpy(store->pool_type, pool_type, sizeof(store->pool_type));
701 store->append = append;
703 /* Now get all devices */
704 while (dir->recv() >= 0) {
705 Dmsg1(dbglvl, "<dird device: %s", dir->msg);
706 ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
710 unbash_spaces(dev_name);
711 store->device->append(bstrdup(dev_name.c_str()));
713 } while (ok && dir->recv() >= 0);
715 /* Developer debug code */
717 if (debug_level >= dbglvl) {
718 foreach_alist(store, dirstore) {
719 Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
720 store->name, store->media_type, store->pool_name,
721 store->pool_type, store->append);
722 foreach_alist(device_name, store->device) {
723 Dmsg1(dbglvl, " Device=%s\n", device_name);
728 init_jcr_device_wait_timers(jcr);
729 jcr->dcr = new_dcr(jcr, NULL, NULL); /* get a dcr */
731 BSOCK *dir = jcr->dir_bsock;
732 dir->fsend(_("3939 Could not get dcr\n"));
733 Dmsg1(dbglvl, ">dird: %s", dir->msg);
737 * At this point, we have a list of all the Director's Storage
738 * resources indicated for this Job, which include Pool, PoolType,
739 * storage name, and Media type.
740 * Then for each of the Storage resources, we have a list of
741 * device names that were given.
743 * Wiffle through them and find one that can do the backup.
746 int wait_for_device_retries = 0;
749 rctx.notify_dir = true;
752 for ( ; !fail && !job_canceled(jcr); ) {
753 pop_reserve_messages(jcr);
754 rctx.suitable_device = false;
755 rctx.have_volume = false;
756 rctx.VolumeName[0] = 0;
757 rctx.any_drive = false;
758 if (!jcr->PreferMountedVols) {
760 * Here we try to find a drive that is not used.
761 * This will maximize the use of available drives.
764 rctx.num_writers = 20000000; /* start with impossible number */
765 rctx.low_use_drive = NULL;
766 rctx.PreferMountedVols = false;
767 rctx.exact_match = false;
768 rctx.autochanger_only = true;
769 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
770 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
771 rctx.autochanger_only, rctx.any_drive);
772 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
775 /* Look through all drives possibly for low_use drive */
776 if (rctx.low_use_drive) {
777 rctx.try_low_use_drive = true;
778 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
781 rctx.try_low_use_drive = false;
783 rctx.autochanger_only = false;
784 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
785 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
786 rctx.autochanger_only, rctx.any_drive);
787 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
792 * Now we look for a drive that may or may not be in
795 /* Look for an exact Volume match all drives */
796 rctx.PreferMountedVols = true;
797 rctx.exact_match = true;
798 rctx.autochanger_only = false;
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 /* Look for any mounted drive */
806 rctx.exact_match = false;
807 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
808 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
809 rctx.autochanger_only, rctx.any_drive);
810 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
814 rctx.any_drive = true;
815 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
816 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
817 rctx.autochanger_only, rctx.any_drive);
818 if ((ok = find_suitable_device_for_job(jcr, rctx))) {
821 /* Keep reservations locked *except* during wait_for_device() */
822 unlock_reservations();
824 * The idea of looping on repeat a few times it to ensure
825 * that if there is some subtle timing problem between two
826 * jobs, we will simply try again, and most likely succeed.
827 * This can happen if one job reserves a drive or finishes using
828 * a drive at the same time a second job wants it.
830 if (repeat++ > 1) { /* try algorithm 3 times */
831 bmicrosleep(30, 0); /* wait a bit */
832 Dmsg0(dbglvl, "repeat reserve algorithm\n");
833 } else if (!rctx.suitable_device || !wait_for_device(jcr, wait_for_device_retries)) {
834 Dmsg0(dbglvl, "Fail. !suitable_device || !wait_for_device\n");
838 dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
840 unlock_reservations();
843 * If we get here, there are no suitable devices available, which
844 * means nothing configured. If a device is suitable but busy
845 * with another Volume, we will not come here.
847 unbash_spaces(dir->msg);
848 pm_strcpy(jcr->errmsg, dir->msg);
849 Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
850 Jmsg(jcr, M_FATAL, 0, _("\n"
851 " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
852 dev_name.c_str(), media_type.c_str());
853 dir->fsend(NO_device, dev_name.c_str());
855 Dmsg1(dbglvl, ">dird: %s", dir->msg);
858 unbash_spaces(dir->msg);
859 pm_strcpy(jcr->errmsg, dir->msg);
860 Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
861 dir->fsend(BAD_use, jcr->errmsg);
862 Dmsg1(dbglvl, ">dird: %s", dir->msg);
865 release_reserve_messages(jcr);
871 * Walk through the autochanger resources and check if
872 * the volume is in one of them.
874 * Returns: true if volume is in device
877 static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
879 AUTOCHANGER *changer = vol->dev->device->changer_res;
881 /* Find resource, and make sure we were able to open it */
882 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
883 Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
886 Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
891 * Search for a device suitable for this job.
892 * Note, this routine sets sets rctx.suitable_device if any
893 * device exists within the SD. The device may not be actually
895 * It also returns if it finds a useable device.
897 bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
906 dirstore = jcr->write_store;
908 dirstore = jcr->read_store;
910 Dmsg4(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d\n",
911 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
912 rctx.autochanger_only);
915 * If the appropriate conditions of this if are met, namely that
916 * we are appending and the user wants mounted drive (or we
917 * force try a mounted drive because they are all busy), we
918 * start by looking at all the Volumes in the volume list.
920 if (!vol_list->empty() && rctx.append && rctx.PreferMountedVols) {
921 dlist *temp_vol_list, *save_vol_list;
924 Dmsg0(dbglvl, "lock volumes\n");
927 * Create a temporary copy of the volume list. We do this,
928 * to avoid having the volume list locked during the
929 * call to reserve_device(), which would cause a deadlock.
930 * Note, we may want to add an update counter on the vol_list
931 * so that if it is modified while we are traversing the copy
932 * we can take note and act accordingly (probably redo the
933 * search at least a few times).
935 Dmsg0(dbglvl, "duplicate vol list\n");
936 temp_vol_list = New(dlist(vol, &vol->link));
937 foreach_dlist(vol, vol_list) {
939 VOLRES *tvol = (VOLRES *)malloc(sizeof(VOLRES));
940 memset(tvol, 0, sizeof(VOLRES));
941 tvol->vol_name = bstrdup(vol->vol_name);
942 tvol->dev = vol->dev;
943 nvol = (VOLRES *)temp_vol_list->binary_insert(tvol, my_compare);
945 tvol->dev = NULL; /* don't zap dev entry */
947 Pmsg0(000, "Logic error. Duplicating vol list hit duplicate.\n");
948 Jmsg(jcr, M_WARNING, 0, "Logic error. Duplicating vol list hit duplicate.\n");
951 Dmsg0(dbglvl, "unlock volumes\n");
954 /* Look through reserved volumes for one we can use */
955 Dmsg0(dbglvl, "look for vol in vol list\n");
956 foreach_dlist(vol, temp_vol_list) {
958 Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
961 /* Check with Director if this Volume is OK */
962 bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
963 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
967 Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
968 foreach_alist(store, dirstore) {
971 foreach_alist(device_name, store->device) {
972 /* Found a device, try to use it */
973 rctx.device_name = device_name;
974 rctx.device = vol->dev->device;
976 if (vol->dev->is_autochanger()) {
977 Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
978 if (!is_vol_in_autochanger(rctx, vol)) {
981 } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
982 Dmsg2(dbglvl, "device=%s not suitable want %s\n",
983 vol->dev->device->hdr.name, device_name);
987 bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
988 rctx.have_volume = true;
989 /* Try reserving this device and volume */
990 Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
991 stat = reserve_device(rctx);
992 if (stat == 1) { /* found available device */
993 Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
996 } else if (stat == 0) { /* device busy */
997 Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
999 /* otherwise error */
1000 Dmsg0(dbglvl, "No suitable device found.\n");
1002 rctx.have_volume = false;
1003 rctx.VolumeName[0] = 0;
1012 } /* end for loop over reserved volumes */
1014 Dmsg0(dbglvl, "lock volumes\n");
1016 save_vol_list = vol_list;
1017 vol_list = temp_vol_list;
1018 free_volume_list(); /* release temp_vol_list */
1019 vol_list = save_vol_list;
1020 Dmsg0(dbglvl, "deleted temp vol list\n");
1021 Dmsg0(dbglvl, "unlock volumes\n");
1023 debug_list_volumes("=== After free temp table\n");
1026 Dmsg1(dbglvl, "Usable dev found. Vol=%s from in-use vols list\n", rctx.VolumeName);
1031 * No reserved volume we can use, so now search for an available device.
1033 * For each storage device that the user specified, we
1034 * search and see if there is a resource for that device.
1036 foreach_alist(store, dirstore) {
1038 foreach_alist(device_name, store->device) {
1040 rctx.device_name = device_name;
1041 stat = search_res_for_device(rctx);
1042 if (stat == 1) { /* found available device */
1043 Dmsg1(dbglvl, "available device found=%s\n", device_name);
1046 } else if (stat == 0) { /* device busy */
1047 Dmsg1(dbglvl, "No usable device=%s, busy: not use\n", device_name);
1049 /* otherwise error */
1050 Dmsg0(dbglvl, "No usable device found.\n");
1058 Dmsg1(dbglvl, "Usable dev found. Vol=%s\n", rctx.VolumeName);
1064 * Search for a particular storage device with particular storage
1065 * characteristics (MediaType).
1067 int search_res_for_device(RCTX &rctx)
1069 AUTOCHANGER *changer;
1072 Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
1073 /* Look through Autochangers first */
1074 foreach_res(changer, R_AUTOCHANGER) {
1075 Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
1076 /* Find resource, and make sure we were able to open it */
1077 if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
1078 /* Try each device in this AutoChanger */
1079 foreach_alist(rctx.device, changer->device) {
1080 Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
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);
1098 /* Now if requested look through regular devices */
1099 if (!rctx.autochanger_only) {
1100 foreach_res(rctx.device, R_DEVICE) {
1101 Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
1102 /* Find resource, and make sure we were able to open it */
1103 if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
1104 stat = reserve_device(rctx);
1105 if (stat != 1) { /* try another device */
1109 if (rctx.store->append == SD_APPEND) {
1110 Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
1111 rctx.device->hdr.name, rctx.jcr->dcr->dev->reserved_device);
1113 Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
1114 rctx.device->hdr.name, rctx.jcr->read_dcr->dev->reserved_device);
1120 return -1; /* nothing found */
1124 * Try to reserve a specific device.
1126 * Returns: 1 -- OK, have DCR
1130 static int reserve_device(RCTX &rctx)
1134 const int name_len = MAX_NAME_LENGTH;
1136 /* Make sure MediaType is OK */
1137 Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
1138 rctx.device->media_type, rctx.store->media_type);
1139 if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
1143 /* Make sure device exists -- i.e. we can stat() it */
1144 if (!rctx.device->dev) {
1145 rctx.device->dev = init_dev(rctx.jcr, rctx.device);
1147 if (!rctx.device->dev) {
1148 if (rctx.device->changer_res) {
1149 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1150 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
1151 rctx.device->hdr.name, rctx.device_name);
1153 Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
1154 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
1157 return -1; /* no use waiting */
1160 rctx.suitable_device = true;
1161 Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
1162 rctx.jcr->dcr = dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev);
1164 BSOCK *dir = rctx.jcr->dir_bsock;
1165 dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
1166 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1169 bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
1170 bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
1171 bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
1172 bstrncpy(dcr->dev_name, rctx.device_name, name_len);
1173 if (rctx.store->append == SD_APPEND) {
1174 Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
1175 ok = reserve_device_for_append(dcr, rctx);
1180 rctx.jcr->dcr = dcr;
1181 Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1182 dcr->dev->reserved_device,
1183 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1184 Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
1185 rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
1186 if (rctx.have_volume) {
1187 Dmsg0(dbglvl, "Call reserve_volume\n");
1188 if (reserve_volume(dcr, rctx.VolumeName)) {
1189 Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
1191 Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
1195 dcr->any_volume = true;
1196 Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
1197 if (dir_find_next_appendable_volume(dcr)) {
1198 bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
1199 rctx.have_volume = true;
1200 Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
1202 Dmsg0(dbglvl, "No next volume found\n");
1203 rctx.have_volume = false;
1204 rctx.VolumeName[0] = 0;
1206 * If there is at least one volume that is valid and in use,
1207 * but we get here, check if we are running with prefers
1208 * non-mounted drives. In that case, we have selected a
1209 * non-used drive and our one and only volume is mounted
1210 * elsewhere, so we bail out and retry using that drive.
1212 if (dcr->volume_in_use && !rctx.PreferMountedVols) {
1213 rctx.PreferMountedVols = true;
1214 if (dcr->VolumeName[0]) {
1215 unreserve_device(dcr);
1220 * Note. Under some circumstances, the Director can hand us
1221 * a Volume name that is not the same as the one on the current
1222 * drive, and in that case, the call above to find the next
1223 * volume will fail because in attempting to reserve the Volume
1224 * the code will realize that we already have a tape mounted,
1225 * and it will fail. This *should* only happen if there are
1226 * writers, thus the following test. In that case, we simply
1227 * bail out, and continue waiting, rather than plunging on
1228 * and hoping that the operator can resolve the problem.
1230 if (dcr->dev->num_writers != 0) {
1231 if (dcr->VolumeName[0]) {
1232 unreserve_device(dcr);
1239 ok = reserve_device_for_read(dcr);
1241 rctx.jcr->read_dcr = dcr;
1242 Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
1243 dcr->dev->reserved_device,
1244 dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
1251 if (rctx.notify_dir) {
1253 BSOCK *dir = rctx.jcr->dir_bsock;
1254 pm_strcpy(dev_name, rctx.device->hdr.name);
1255 bash_spaces(dev_name);
1256 ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
1257 Dmsg1(dbglvl, ">dird: %s", dir->msg);
1264 rctx.have_volume = false;
1265 rctx.VolumeName[0] = 0;
1266 Dmsg0(dbglvl, "Not OK.\n");
1271 * We "reserve" the drive by setting the ST_READ bit. No one else
1272 * should touch the drive until that is cleared.
1273 * This allows the DIR to "reserve" the device before actually
1276 static bool reserve_device_for_read(DCR *dcr)
1278 DEVICE *dev = dcr->dev;
1279 JCR *jcr = dcr->jcr;
1286 if (is_device_unmounted(dev)) {
1287 Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
1288 Mmsg(jcr->errmsg, _("3601 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1289 jcr->JobId, dev->print_name());
1290 queue_reserve_message(jcr);
1294 if (dev->is_busy()) {
1295 Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
1297 dev->state & ST_READ?1:0, dev->num_writers, dev->reserved_device);
1298 Mmsg(jcr->errmsg, _("3602 JobId=%u device %s is busy (already reading/writing).\n"),
1299 jcr->JobId, dev->print_name());
1300 queue_reserve_message(jcr);
1304 dev->clear_append();
1307 dev->reserved_device++;
1308 Dmsg3(dbglvl, "Inc reserve=%d dev=%s %p\n", dev->reserved_device, dev->print_name(), dev);
1309 dcr->reserved_device = true;
1318 * We reserve the device for appending by incrementing the
1319 * reserved_device. We do virtually all the same work that
1320 * is done in acquire_device_for_append(), but we do
1321 * not attempt to mount the device. This routine allows
1322 * the DIR to reserve multiple devices before *really*
1323 * starting the job. It also permits the SD to refuse
1324 * certain devices (not up, ...).
1326 * Note, in reserving a device, if the device is for the
1327 * same pool and the same pool type, then it is acceptable.
1328 * The Media Type has already been checked. If we are
1329 * the first tor reserve the device, we put the pool
1330 * name and pool type in the device record.
1332 static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
1334 JCR *jcr = dcr->jcr;
1335 DEVICE *dev = dcr->dev;
1342 /* If device is being read, we cannot write it */
1343 if (dev->can_read()) {
1344 Mmsg(jcr->errmsg, _("3603 JobId=%u device %s is busy reading.\n"),
1345 jcr->JobId, dev->print_name());
1346 Dmsg1(dbglvl, "%s", jcr->errmsg);
1347 queue_reserve_message(jcr);
1351 /* If device is unmounted, we are out of luck */
1352 if (is_device_unmounted(dev)) {
1353 Mmsg(jcr->errmsg, _("3604 JobId=%u device %s is BLOCKED due to user unmount.\n"),
1354 jcr->JobId, dev->print_name());
1355 Dmsg1(dbglvl, "%s", jcr->errmsg);
1356 queue_reserve_message(jcr);
1360 Dmsg1(dbglvl, "reserve_append device is %s\n", dev->print_name());
1362 /* Now do detailed tests ... */
1363 if (can_reserve_drive(dcr, rctx) != 1) {
1364 Dmsg0(dbglvl, "can_reserve_drive!=1\n");
1368 dev->reserved_device++;
1369 Dmsg3(dbglvl, "Inc reserve=%d dev=%s %p\n", dev->reserved_device,
1370 dev->print_name(), dev);
1371 dcr->reserved_device = true;
1379 static int is_pool_ok(DCR *dcr)
1381 DEVICE *dev = dcr->dev;
1382 JCR *jcr = dcr->jcr;
1384 /* Now check if we want the same Pool and pool type */
1385 if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
1386 strcmp(dev->pool_type, dcr->pool_type) == 0) {
1387 /* OK, compatible device */
1388 Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
1391 /* Drive Pool not suitable for us */
1392 Mmsg(jcr->errmsg, _(
1393 "3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on drive %s.\n"),
1394 (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
1395 dev->reserved_device, dev->print_name());
1396 queue_reserve_message(jcr);
1397 Dmsg2(dbglvl, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
1398 dev->pool_name, dcr->pool_name);
1403 static bool is_max_jobs_ok(DCR *dcr)
1405 DEVICE *dev = dcr->dev;
1406 JCR *jcr = dcr->jcr;
1408 Dmsg4(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Vol=%s\n",
1409 dcr->VolCatInfo.VolCatMaxJobs,
1410 dcr->VolCatInfo.VolCatJobs, dev->reserved_device,
1412 if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
1413 (dcr->VolCatInfo.VolCatJobs + dev->reserved_device)) {
1414 /* Max Job Vols depassed or already reserved */
1415 Mmsg(jcr->errmsg, _("3610 JobId=%u Volume max jobs exceeded on drive %s.\n"),
1416 (uint32_t)jcr->JobId, dev->print_name());
1417 queue_reserve_message(jcr);
1418 Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
1419 return false; /* wait */
1425 * Returns: 1 if drive can be reserved
1426 * 0 if we should wait
1427 * -1 on error or impossibility
1429 static int can_reserve_drive(DCR *dcr, RCTX &rctx)
1431 DEVICE *dev = dcr->dev;
1432 JCR *jcr = dcr->jcr;
1434 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1435 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1436 rctx.autochanger_only, rctx.any_drive);
1438 /* Check for max jobs on this Volume */
1439 if (!is_max_jobs_ok(dcr)) {
1443 /* setting any_drive overrides PreferMountedVols flag */
1444 if (!rctx.any_drive) {
1446 * When PreferMountedVols is set, we keep track of the
1447 * drive in use that has the least number of writers, then if
1448 * no unmounted drive is found, we try that drive. This
1449 * helps spread the load to the least used drives.
1451 if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
1452 Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
1453 dev->print_name(), rctx.low_use_drive->print_name());
1456 /* If he wants a free drive, but this one is busy, no go */
1457 if (!rctx.PreferMountedVols && dev->is_busy()) {
1458 /* Save least used drive */
1459 if ((dev->num_writers + dev->reserved_device) < rctx.num_writers) {
1460 rctx.num_writers = dev->num_writers + dev->reserved_device;
1461 rctx.low_use_drive = dev;
1462 Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
1463 dev->print_name(), rctx.num_writers);
1465 Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->reserved_device);
1467 Dmsg0(dbglvl, "failed: !prefMnt && busy.\n");
1468 Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but device %s is busy.\n"),
1469 jcr->JobId, dev->print_name());
1470 queue_reserve_message(jcr);
1474 /* Check for prefer mounted volumes */
1475 if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
1476 Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but drive %s has no Volume.\n"),
1477 jcr->JobId, dev->print_name());
1478 queue_reserve_message(jcr);
1479 Dmsg0(dbglvl, "failed: want mounted -- no vol\n");
1480 return 0; /* No volume mounted */
1483 /* Check for exact Volume name match */
1484 /* ***FIXME*** for Disk, we can accept any volume that goes with this
1487 if (rctx.exact_match && rctx.have_volume) {
1489 Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
1490 rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
1491 rctx.autochanger_only, rctx.any_drive);
1492 Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
1493 rctx.have_volume, dev->VolHdr.VolumeName,
1494 dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1495 ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
1496 (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
1498 Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on drive %s.\n"),
1499 jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
1501 queue_reserve_message(jcr);
1502 Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
1503 dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
1506 if (is_volume_in_use(dcr)) {
1507 return 0; /* fail if volume on another drive */
1512 /* Check for unused autochanger drive */
1513 if (rctx.autochanger_only && !dev->is_busy() &&
1514 dev->VolHdr.VolumeName[0] == 0) {
1515 /* Device is available but not yet reserved, reserve it for us */
1516 Dmsg1(dbglvl, "OK Res Unused autochanger %s.\n", dev->print_name());
1517 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1518 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1519 return 1; /* reserve drive */
1523 * Handle the case that there are no writers
1525 if (dev->num_writers == 0) {
1526 /* Now check if there are any reservations on the drive */
1527 if (dev->reserved_device) {
1528 return is_pool_ok(dcr);
1529 } else if (dev->can_append()) {
1530 if (is_pool_ok(dcr)) {
1533 /* Changing pool, unload old tape if any in drive */
1534 Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
1535 unload_autochanger(dcr, 0);
1538 /* Device is available but not yet reserved, reserve it for us */
1539 Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
1540 bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
1541 bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
1542 return 1; /* reserve drive */
1546 * Check if the device is in append mode with writers (i.e.
1547 * available if pool is the same).
1549 if (dev->can_append() || dev->num_writers > 0) {
1550 return is_pool_ok(dcr);
1552 Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
1553 Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! drive %s Should not get here.\n"),
1554 jcr->JobId, dev->print_name());
1555 queue_reserve_message(jcr);
1556 Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
1557 return -1; /* error, should not get here */
1559 Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve drive %s.\n"),
1560 jcr->JobId, dev->print_name());
1561 queue_reserve_message(jcr);
1562 Dmsg1(dbglvl, "failed: No reserve %s\n", dev->print_name());
1570 * Queue a reservation error or failure message for this jcr
1572 static void queue_reserve_message(JCR *jcr)
1580 msgs = jcr->reserve_msgs;
1585 * Look for duplicate message. If found, do
1588 for (i=msgs->size()-1; i >= 0; i--) {
1589 msg = (char *)msgs->get(i);
1593 /* Comparison based on 4 digit message number */
1594 if (strncmp(msg, jcr->errmsg, 4) == 0) {
1598 /* Message unique, so insert it */
1599 jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
1606 * Send any reservation messages queued for this jcr
1608 void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
1615 msgs = jcr->reserve_msgs;
1616 if (!msgs || msgs->size() == 0) {
1619 for (i=msgs->size()-1; i >= 0; i--) {
1620 msg = (char *)msgs->get(i);
1622 sendit(" ", 3, arg);
1623 sendit(msg, strlen(msg), arg);
1634 * Pop and release any reservations messages
1636 static void pop_reserve_messages(JCR *jcr)
1642 msgs = jcr->reserve_msgs;
1646 while ((msg = (char *)msgs->pop())) {
1654 * Also called from acquire.c
1656 void release_reserve_messages(JCR *jcr)
1658 pop_reserve_messages(jcr);
1660 if (!jcr->reserve_msgs) {
1663 delete jcr->reserve_msgs;
1664 jcr->reserve_msgs = NULL;