+/*
+ Bacula(R) - The Network Backup Solution
+
+ Copyright (C) 2000-2016 Kern Sibbald
+
+ The original author of Bacula is Kern Sibbald, with contributions
+ from many others, a complete list can be found in the file AUTHORS.
+
+ You may use this file and others of this release according to the
+ license defined in the LICENSE file, which includes the Affero General
+ Public License, v3.0 ("AGPLv3") and some additional permissions and
+ terms pursuant to its AGPLv3 Section 7.
+
+ This notice must be preserved when any source code is
+ conveyed and/or propagated.
+
+ Bacula(R) is a registered trademark of Kern Sibbald.
+*/
/*
* Drive reservation functions for Storage Daemon
*
- * Kern Sibbald, MM
+ * Written by Kern Sibbald, MM
*
* Split from job.c and acquire.c June 2005
*
- * Version $Id$
- *
- */
-/*
- Copyright (C) 2000-2005 Kern Sibbald
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License
- version 2 as amended with additional clauses defined in the
- file LICENSE in the main source directory.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- the file LICENSE for additional details.
-
*/
#include "bacula.h"
#include "stored.h"
-/*
- * Use Device command from Director
- * He tells is what Device Name to use, the Media Type,
- * the Pool Name, and the Pool Type.
- *
- * Ensure that the device exists and is opened, then store
- * the media and pool info in the JCR. This class is used
- * only temporarily in this file.
- */
-class DIRSTORE {
-public:
- alist *device;
- bool append;
- char name[MAX_NAME_LENGTH];
- char media_type[MAX_NAME_LENGTH];
- char pool_name[MAX_NAME_LENGTH];
- char pool_type[MAX_NAME_LENGTH];
-};
-
-/* Reserve context */
-class RCTX {
-public:
- alist *errors;
- JCR *jcr;
- char *device_name;
- DIRSTORE *store;
- DEVRES *device;
- bool PreferMountedVols;
- bool exact_match;
- bool have_volume;
- bool do_not_wait;
- bool available_autochanger;
- char VolumeName[MAX_NAME_LENGTH];
-};
-
-static dlist *vol_list = NULL;
-static pthread_mutex_t vol_list_lock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_mutex_t search_lock = PTHREAD_MUTEX_INITIALIZER;
+const int dbglvl = 150;
+
+static brwlock_t reservation_lock;
+int reservations_lock_count = 0;
/* Forward referenced functions */
-static int can_reserve_drive(DCR *dcr, RCTX &rctx);
-static int search_res_for_device(RCTX &rctx);
-static int reserve_device(RCTX &rctx);
-static bool reserve_device_for_read(DCR *dcr);
+static int can_reserve_drive(DCR *dcr, RCTX &rctx);
+static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol);
static bool reserve_device_for_append(DCR *dcr, RCTX &rctx);
-static bool use_storage_cmd(JCR *jcr);
-bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx);
+static bool reserve_device_for_read(DCR *dcr);
+static bool use_device_cmd(JCR *jcr);
+static int reserve_device(RCTX &rctx);
+static void pop_reserve_messages(JCR *jcr);
+static void queue_reserve_message(JCR *jcr);
+//void switch_device(DCR *dcr, DEVICE *dev);
/* Requests from the Director daemon */
static char use_storage[] = "use storage=%127s media_type=%127s "
- "pool_name=%127s pool_type=%127s append=%d copy=%d stripe=%d\n";
+ "pool_name=%127s pool_type=%127s append=%d copy=%d stripe=%d\n";
static char use_device[] = "use device=%127s\n";
/* Responses sent to Director daemon */
static char OK_device[] = "3000 OK use device device=%s\n";
-static char NO_device[] = "3924 Device \"%s\" not in SD Device resources.\n";
+static char NO_device[] = "3924 Device \"%s\" not in SD Device"
+ " resources or no matching Media Type.\n";
static char BAD_use[] = "3913 Bad use command: %s\n";
-bool use_cmd(JCR *jcr)
+/*
+ * This allows a given thread to recursively call lock_reservations.
+ * It must, of course, call unlock_... the same number of times.
+ */
+void init_reservations_lock()
{
- /*
- * Get the device, media, and pool information
- */
- if (!use_storage_cmd(jcr)) {
- set_jcr_job_status(jcr, JS_ErrorTerminated);
- memset(jcr->sd_auth_key, 0, strlen(jcr->sd_auth_key));
- return false;
+ int errstat;
+ if ((errstat=rwl_init(&reservation_lock)) != 0) {
+ berrno be;
+ Emsg1(M_ABORT, 0, _("Unable to initialize reservation lock. ERR=%s\n"),
+ be.bstrerror(errstat));
}
- return true;
-}
-static int my_compare(void *item1, void *item2)
-{
- return strcmp(((VOLRES *)item1)->vol_name, ((VOLRES *)item2)->vol_name);
+ init_vol_list_lock();
}
-/*
- * Put a new Volume entry in the Volume list. This
- * effectively reserves the volume so that it will
- * not be mounted again.
- *
- * Return: VOLRES entry on success
- * NULL if the Volume is already in the list
- */
-VOLRES *new_volume(DCR *dcr, const char *VolumeName)
+/* This applies to a drive and to Volumes */
+void _lock_reservations(const char *file, int line)
{
- VOLRES *vol, *nvol;
-
- Dmsg1(400, "new_volume %s\n", VolumeName);
- vol = (VOLRES *)malloc(sizeof(VOLRES));
- memset(vol, 0, sizeof(VOLRES));
- vol->vol_name = bstrdup(VolumeName);
- vol->dev = dcr->dev;
- vol->dcr = dcr;
- P(vol_list_lock);
- nvol = (VOLRES *)vol_list->binary_insert(vol, my_compare);
- V(vol_list_lock);
- if (nvol != vol) {
- free(vol->vol_name);
- free(vol);
- if (dcr->dev) {
- nvol->dev = dcr->dev;
- }
- return NULL;
+ int errstat;
+ reservations_lock_count++;
+ if ((errstat=rwl_writelock_p(&reservation_lock, file, line)) != 0) {
+ berrno be;
+ Emsg2(M_ABORT, 0, "rwl_writelock failure. stat=%d: ERR=%s\n",
+ errstat, be.bstrerror(errstat));
}
- return vol;
}
-/*
- * Search for a Volume name in the Volume list.
- *
- * Returns: VOLRES entry on success
- * NULL if the Volume is not in the list
- */
-VOLRES *find_volume(const char *VolumeName)
+void _unlock_reservations()
{
- VOLRES vol, *fvol;
- vol.vol_name = bstrdup(VolumeName);
- P(vol_list_lock);
- fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
- V(vol_list_lock);
- free(vol.vol_name);
- return fvol;
+ int errstat;
+ reservations_lock_count--;
+ if ((errstat=rwl_writeunlock(&reservation_lock)) != 0) {
+ berrno be;
+ Emsg2(M_ABORT, 0, "rwl_writeunlock failure. stat=%d: ERR=%s\n",
+ errstat, be.bstrerror(errstat));
+ }
}
-/*
- * Free a Volume from the Volume list
- *
- * Returns: true if the Volume found and removed from the list
- * false if the Volume is not in the list
- */
-bool free_volume(DEVICE *dev)
+void term_reservations_lock()
{
- VOLRES vol, *fvol;
-
- if (dev->VolHdr.VolumeName[0] == 0) {
- return false;
- }
- Dmsg1(400, "free_volume %s\n", dev->VolHdr.VolumeName);
- vol.vol_name = bstrdup(dev->VolHdr.VolumeName);
- P(vol_list_lock);
- fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
- if (fvol) {
- vol_list->remove(fvol);
- free(fvol->vol_name);
- free(fvol);
- }
- V(vol_list_lock);
- free(vol.vol_name);
- dev->VolHdr.VolumeName[0] = 0;
- return fvol != NULL;
+ rwl_destroy(&reservation_lock);
+ term_vol_list_lock();
}
-/* Free volume reserved by this dcr but not attached to a dev */
-void free_unused_volume(DCR *dcr)
+void DCR::clear_reserved()
{
- VOLRES *vol;
- P(vol_list_lock);
- for (vol=(VOLRES *)vol_list->first(); vol; vol=(VOLRES *)vol_list->next(vol)) {
- if (vol->dcr == dcr && (vol->dev == NULL ||
- strcmp(vol->vol_name, vol->dev->VolHdr.VolumeName) != 0)) {
- vol_list->remove(vol);
- free(vol->vol_name);
- free(vol);
- break;
- }
+ if (m_reserved) {
+ m_reserved = false;
+ dev->dec_reserved();
+ Dmsg2(dbglvl, "Dec reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
}
- V(vol_list_lock);
}
-/*
- * List Volumes -- this should be moved to status.c
- */
-void list_volumes(BSOCK *user)
+void DCR::set_reserved_for_append()
{
- VOLRES *vol;
- for (vol=(VOLRES *)vol_list->first(); vol; vol=(VOLRES *)vol_list->next(vol)) {
- if (vol->dev) {
- bnet_fsend(user, "%s on device %s\n", vol->vol_name, vol->dev->print_name());
- } else {
- bnet_fsend(user, "%s\n", vol->vol_name);
- }
- }
+ m_reserved = true;
+ dev->set_append_reserve();
+ Dmsg2(dbglvl, "Inc reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
+ dev->inc_reserved();
}
-
-/* Create the Volume list */
-void create_volume_list()
+
+void DCR::set_reserved_for_read()
{
- VOLRES *dummy = NULL;
- if (vol_list == NULL) {
- vol_list = New(dlist(dummy, &dummy->link));
- }
+ m_reserved = true;
+ dev->set_read_reserve();
+ Dmsg2(dbglvl, "Inc reserve=%d dev=%s\n", dev->num_reserved(), dev->print_name());
+ dev->inc_reserved();
}
-/* Release all Volumes from the list */
-void free_volume_list()
+/*
+ * Remove any reservation from a drive and tell the system
+ * that the volume is unused at least by us.
+ */
+void DCR::unreserve_device(bool locked)
{
- VOLRES *vol;
- if (!vol_list) {
- return;
+ if (!locked) {
+ dev->Lock();
+ }
+ if (is_reserved()) {
+ clear_reserved();
+ reserved_volume = false;
+ /* If we set read mode in reserving, remove it */
+ if (dev->can_read()) {
+ remove_read_volume(jcr, this->VolumeName);
+ dev->clear_read();
+ }
+ if (dev->num_writers < 0) {
+ Jmsg1(jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
+ dev->num_writers = 0;
+ }
+ if (dev->num_reserved() == 0 && dev->num_writers == 0) {
+ generate_plugin_event(jcr, bsdEventDeviceClose, this);
+ volume_unused(this);
+ }
}
- for (vol=(VOLRES *)vol_list->first(); vol; vol=(VOLRES *)vol_list->next(vol)) {
- Dmsg3(000, "Unreleased Volume=%s dcr=0x%x dev=0x%x\n", vol->vol_name,
- vol->dcr, vol->dev);
+ if (!locked) {
+ dev->Unlock();
}
- delete vol_list;
- vol_list = NULL;
}
-bool is_volume_in_use(DCR *dcr)
+bool use_cmd(JCR *jcr)
{
- VOLRES *vol = find_volume(dcr->VolumeName);
- if (!vol) {
- return false; /* vol not in list */
- }
- if (!vol->dev) { /* vol not attached to device */
- return false;
- }
- if (dcr->dev == vol->dev) { /* same device OK */
- return false;
- }
- if (!vol->dev->is_busy()) {
+ /*
+ * Get the device, media, and pool information
+ */
+ if (!use_device_cmd(jcr)) {
+ jcr->setJobStatus(JS_ErrorTerminated);
+ memset(jcr->sd_auth_key, 0, strlen(jcr->sd_auth_key));
return false;
}
return true;
}
-
-static bool use_storage_cmd(JCR *jcr)
+/*
+ * We get the following type of information:
+ *
+ * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=1 copy=0 strip=0
+ * use device=zzz
+ * use device=aaa
+ * use device=bbb
+ * use storage=xxx media_type=yyy pool_name=xxx pool_type=yyy append=0 copy=0 strip=0
+ * use device=bbb
+ *
+ */
+static bool use_device_cmd(JCR *jcr)
{
POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
BSOCK *dir = jcr->dir_bsock;
- int append;
- bool ok;
- int Copy, Stripe;
+ int32_t append;
+ bool ok;
+ int32_t Copy, Stripe;
DIRSTORE *store;
RCTX rctx;
-#ifdef implemented
- char *error;
-#endif
+ alist *dirstore;
memset(&rctx, 0, sizeof(RCTX));
rctx.jcr = jcr;
* If there are multiple devices, the director sends us
* use_device for each device that it wants to use.
*/
- Dmsg1(100, "<dird: %s", dir->msg);
- jcr->dirstore = New(alist(10, not_owned_by_alist));
+ dirstore = New(alist(10, not_owned_by_alist));
+ jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
do {
- ok = sscanf(dir->msg, use_storage, store_name.c_str(),
- media_type.c_str(), pool_name.c_str(),
+ Dmsg1(dbglvl, "<dird: %s", dir->msg);
+ ok = sscanf(dir->msg, use_storage, store_name.c_str(),
+ media_type.c_str(), pool_name.c_str(),
pool_type.c_str(), &append, &Copy, &Stripe) == 7;
if (!ok) {
break;
}
+ if (append) {
+ jcr->write_store = dirstore;
+ } else {
+ jcr->read_store = dirstore;
+ }
+ rctx.append = append;
unbash_spaces(store_name);
unbash_spaces(media_type);
unbash_spaces(pool_name);
unbash_spaces(pool_type);
store = new DIRSTORE;
- jcr->dirstore->append(store);
+ dirstore->append(store);
memset(store, 0, sizeof(DIRSTORE));
store->device = New(alist(10));
bstrncpy(store->name, store_name, sizeof(store->name));
store->append = append;
/* Now get all devices */
- while (bnet_recv(dir) >= 0) {
+ while (dir->recv() >= 0) {
+ Dmsg1(dbglvl, "<dird device: %s", dir->msg);
ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
if (!ok) {
break;
unbash_spaces(dev_name);
store->device->append(bstrdup(dev_name.c_str()));
}
- } while (ok && bnet_recv(dir) >= 0);
+ } while (ok && dir->recv() >= 0);
-#ifdef DEVELOPER
- /* This loop is debug code and can be removed */
- /* ***FIXME**** remove after 1.38 release */
+#ifdef xxxx
+ /* Developers debug code */
char *device_name;
- foreach_alist(store, jcr->dirstore) {
- Dmsg4(100, "Storage=%s media_type=%s pool=%s pool_type=%s\n",
- store->name, store->media_type, store->pool_name,
- store->pool_type);
- foreach_alist(device_name, store->device) {
- Dmsg1(100, " Device=%s\n", device_name);
+ if (debug_level >= dbglvl) {
+ foreach_alist(store, dirstore) {
+ Dmsg5(dbglvl, "Storage=%s media_type=%s pool=%s pool_type=%s append=%d\n",
+ store->name, store->media_type, store->pool_name,
+ store->pool_type, store->append);
+ foreach_alist(device_name, store->device) {
+ Dmsg1(dbglvl, " Device=%s\n", device_name);
+ }
}
}
#endif
- /*
+ init_jcr_device_wait_timers(jcr);
+ jcr->dcr = new_dcr(jcr, NULL, NULL, !rctx.append); /* get a dcr */
+ if (!jcr->dcr) {
+ BSOCK *dir = jcr->dir_bsock;
+ dir->fsend(_("3939 Could not get dcr\n"));
+ Dmsg1(dbglvl, ">dird: %s", dir->msg);
+ ok = false;
+ }
+ /*
* At this point, we have a list of all the Director's Storage
* resources indicated for this Job, which include Pool, PoolType,
- * storage name, and Media type.
+ * storage name, and Media type.
* Then for each of the Storage resources, we have a list of
* device names that were given.
*
* Wiffle through them and find one that can do the backup.
*/
if (ok) {
- /*
- * First look for an exact match of Volume name as the
- * tape may already be mounted.
- */
- rctx.do_not_wait = true;
- rctx.exact_match = true;
- if ((ok = find_suitable_device_for_job(jcr, rctx))) {
- goto done;
- }
- rctx.exact_match = false;
-
- /* Now search if an unused autochanger slot is available */
- rctx.available_autochanger = true;
- if ((ok = find_suitable_device_for_job(jcr, rctx))) {
- goto done;
- }
- rctx.available_autochanger = false;
-
-
- /*
- * Make up to two passes. The first with PreferMountedVols possibly
- * set to true. In that case, we look only for an available
- * drive with something mounted. If that fails, then we
- * do a second pass with PerferMountedVols set false.
- */
- rctx.PreferMountedVols = jcr->PreferMountedVols;
- if (!rctx.PreferMountedVols) {
- rctx.do_not_wait = false;
- }
- if ((ok = find_suitable_device_for_job(jcr, rctx))) {
- goto done;
+ int wait_for_device_retries = 0;
+ int repeat = 0;
+ bool fail = false;
+ rctx.notify_dir = true;
+
+ /* Put new dcr in proper location */
+ if (rctx.append) {
+ rctx.jcr->dcr = jcr->dcr;
+ } else {
+ rctx.jcr->read_dcr = jcr->dcr;
}
- if (rctx.PreferMountedVols) {
- rctx.PreferMountedVols = false;
- rctx.do_not_wait = false;
+ lock_reservations();
+ for ( ; !fail && !job_canceled(jcr); ) {
+ pop_reserve_messages(jcr);
+ rctx.suitable_device = false;
+ rctx.have_volume = false;
+ rctx.VolumeName[0] = 0;
+ rctx.any_drive = false;
+ if (!jcr->PreferMountedVols) {
+ /*
+ * Here we try to find a drive that is not used.
+ * This will maximize the use of available drives.
+ *
+ */
+ rctx.num_writers = 20000000; /* start with impossible number */
+ rctx.low_use_drive = NULL;
+ rctx.PreferMountedVols = false;
+ rctx.exact_match = false;
+ rctx.autochanger_only = true;
+ if ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ break;
+ }
+ /* Look through all drives possibly for low_use drive */
+ if (rctx.low_use_drive) {
+ rctx.try_low_use_drive = true;
+ if ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ break;
+ }
+ rctx.try_low_use_drive = false;
+ }
+ rctx.autochanger_only = false;
+ if ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ break;
+ }
+ }
+ /*
+ * Now we look for a drive that may or may not be in
+ * use.
+ */
+ /* Look for an exact Volume match all drives */
+ rctx.PreferMountedVols = true;
+ rctx.exact_match = true;
+ rctx.autochanger_only = false;
if ((ok = find_suitable_device_for_job(jcr, rctx))) {
- goto done;
+ break;
}
+ /* Look for any mounted drive */
+ rctx.exact_match = false;
+ if ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ break;
+ }
+ /* Try any drive */
+ rctx.any_drive = true;
+ if ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ break;
+ }
+ /* Keep reservations locked *except* during wait_for_device() */
+ unlock_reservations();
+ /*
+ * The idea of looping on repeat a few times it to ensure
+ * that if there is some subtle timing problem between two
+ * jobs, we will simply try again, and most likely succeed.
+ * This can happen if one job reserves a drive or finishes using
+ * a drive at the same time a second job wants it.
+ */
+ if (repeat++ > 1) { /* try algorithm 3 times */
+ bmicrosleep(30, 0); /* wait a bit */
+ Dmsg1(100, "repeat reserve algorithm JobId=%d\n", jcr->JobId);
+ } else if (!rctx.suitable_device || !wait_for_any_device(jcr, wait_for_device_retries)) {
+ Dmsg0(100, "Fail. !suitable_device || !wait_for_device\n");
+ fail = true;
+ }
+ lock_reservations();
+ dir->signal(BNET_HEARTBEAT); /* Inform Dir that we are alive */
}
- if (verbose) {
+ unlock_reservations();
+
+ if (!ok) {
+ /*
+ * If we get here, there are no suitable devices available, which
+ * means nothing configured. If a device is suitable but busy
+ * with another Volume, we will not come here.
+ */
unbash_spaces(dir->msg);
pm_strcpy(jcr->errmsg, dir->msg);
- Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
- }
- Jmsg(jcr, M_FATAL, 0, _("\n"
- " Device \"%s\" with MediaType \"%s\" requested by DIR not found in SD Device resources.\n"),
- dev_name.c_str(), media_type.c_str());
- bnet_fsend(dir, NO_device, dev_name.c_str());
-#ifdef implemented
- for (error=(char*)rctx->errors.first(); error;
- error=(char*)rctx->errors.next()) {
- Jmsg(jcr, M_INFO, 0, "%s", error);
+ Jmsg(jcr, M_FATAL, 0, _("Device reservation failed for JobId=%d: %s\n"),
+ jcr->JobId, jcr->errmsg);
+ dir->fsend(NO_device, dev_name.c_str());
+
+ Dmsg1(dbglvl, ">dird: %s", dir->msg);
}
-#endif
- Dmsg1(100, ">dird: %s", dir->msg);
} else {
unbash_spaces(dir->msg);
pm_strcpy(jcr->errmsg, dir->msg);
- if (verbose) {
- Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
- }
- bnet_fsend(dir, BAD_use, jcr->errmsg);
- Dmsg1(100, ">dird: %s", dir->msg);
+ Jmsg(jcr, M_FATAL, 0, _("Failed command: %s\n"), jcr->errmsg);
+ dir->fsend(BAD_use, jcr->errmsg);
+ Dmsg1(dbglvl, ">dird: %s", dir->msg);
}
-done:
- foreach_alist(store, jcr->dirstore) {
- delete store->device;
- delete store;
- }
- delete jcr->dirstore;
-#ifdef implemented
- for (error=(char*)rctx->errors.first(); error;
- error=(char*)rctx->errors.next()) {
- free(error);
- }
-#endif
+ release_reserve_messages(jcr);
return ok;
}
-
/*
* Search for a device suitable for this job.
+ * Note, this routine sets sets rctx.suitable_device if any
+ * device exists within the SD. The device may not be actually
+ * useable.
+ * It also returns if it finds a useable device.
*/
bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
{
- bool first = true;
- bool ok;
- DCR *dcr = NULL;
+ bool ok = false;
DIRSTORE *store;
char *device_name;
+ alist *dirstore;
+ DCR *dcr = jcr->dcr;
- init_jcr_device_wait_timers(jcr);
- for ( ;; ) {
- int can_wait = false;
- ok = false;
- P(search_lock);
- foreach_alist(store, jcr->dirstore) {
- rctx.store = store;
- foreach_alist(device_name, store->device) {
+ if (rctx.append) {
+ dirstore = jcr->write_store;
+ } else {
+ dirstore = jcr->read_store;
+ }
+ Dmsg5(dbglvl, "Start find_suit_dev PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
+ rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
+ rctx.autochanger_only, rctx.any_drive);
+
+ /*
+ * If the appropriate conditions of this if are met, namely that
+ * we are appending and the user wants mounted drive (or we
+ * force try a mounted drive because they are all busy), we
+ * start by looking at all the Volumes in the volume list.
+ */
+ if (!is_vol_list_empty() && rctx.append && rctx.PreferMountedVols) {
+ dlist *temp_vol_list;
+ VOLRES *vol = NULL;
+ temp_vol_list = dup_vol_list(jcr);
+
+ /* Look through reserved volumes for one we can use */
+ Dmsg0(dbglvl, "look for vol in vol list\n");
+ foreach_dlist(vol, temp_vol_list) {
+ if (!vol->dev) {
+ Dmsg1(dbglvl, "vol=%s no dev\n", vol->vol_name);
+ continue;
+ }
+ /* Check with Director if this Volume is OK */
+ bstrncpy(dcr->VolumeName, vol->vol_name, sizeof(dcr->VolumeName));
+ if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
+ continue;
+ }
+
+ Dmsg1(dbglvl, "vol=%s OK for this job\n", vol->vol_name);
+ foreach_alist(store, dirstore) {
int stat;
- rctx.device_name = device_name;
- stat = search_res_for_device(rctx);
- if (stat == 1) { /* found available device */
- ok = true;
+ rctx.store = store;
+ foreach_alist(device_name, store->device) {
+ /* Found a device, try to use it */
+ rctx.device_name = device_name;
+ rctx.device = vol->dev->device;
+
+ if (vol->dev->read_only) {
+ continue;
+ }
+ if (vol->dev->is_autochanger()) {
+ Dmsg1(dbglvl, "vol=%s is in changer\n", vol->vol_name);
+ if (!is_vol_in_autochanger(rctx, vol) || !vol->dev->autoselect ||
+ !vol->dev->enabled) {
+ continue;
+ }
+ } else if (strcmp(device_name, vol->dev->device->hdr.name) != 0) {
+ Dmsg2(dbglvl, "device=%s not suitable want %s\n",
+ vol->dev->device->hdr.name, device_name);
+ continue;
+ }
+
+ bstrncpy(rctx.VolumeName, vol->vol_name, sizeof(rctx.VolumeName));
+ rctx.have_volume = true;
+ /* Try reserving this device and volume */
+ Dmsg2(dbglvl, "try vol=%s on device=%s\n", rctx.VolumeName, device_name);
+ stat = reserve_device(rctx);
+ if (stat == 1) { /* found available device */
+ Dmsg1(dbglvl, "Suitable device found=%s\n", device_name);
+ ok = true;
+ break;
+ } else if (stat == 0) { /* device busy */
+ Dmsg1(dbglvl, "Suitable device=%s, busy: not use\n", device_name);
+ } else {
+ /* otherwise error */
+ Dmsg0(dbglvl, "No suitable device found.\n");
+ }
+ rctx.have_volume = false;
+ rctx.VolumeName[0] = 0;
+ }
+ if (ok) {
break;
- } else if (stat == 0) { /* device busy */
- can_wait = true;
}
- /* otherwise error */
-// rctx->errors.push(bstrdup(jcr->errmsg));
}
if (ok) {
break;
}
+ } /* end for loop over reserved volumes */
+
+ Dmsg0(dbglvl, "lock volumes\n");
+ free_temp_vol_list(temp_vol_list);
+ }
+ if (ok) {
+ Dmsg1(dbglvl, "OK dev found. Vol=%s from in-use vols list\n", rctx.VolumeName);
+ return true;
+ }
+
+ /*
+ * No reserved volume we can use, so now search for an available device.
+ *
+ * For each storage device that the user specified, we
+ * search and see if there is a resource for that device.
+ */
+ foreach_alist(store, dirstore) {
+ rctx.store = store;
+ foreach_alist(device_name, store->device) {
+ int stat;
+ rctx.device_name = device_name;
+ stat = search_res_for_device(rctx);
+ if (stat == 1) { /* found available device */
+ Dmsg1(dbglvl, "available device found=%s\n", device_name);
+ ok = true;
+ break;
+ } else if (stat == 0) { /* device busy */
+ Dmsg1(dbglvl, "No usable device=%s, busy: not use\n", device_name);
+ } else {
+ /* otherwise error */
+ Dmsg0(dbglvl, "No usable device found.\n");
+ }
}
- V(search_lock);
- /*
- * We did not find a suitable device, so
- * if there is some device for which we can wait, then
- * wait and try again until the wait time expires
- */
- if (rctx.do_not_wait || !can_wait || !wait_for_device(jcr, first)) {
+ if (ok) {
break;
}
- first = false; /* first wait complete */
-
-#ifdef implemented
- for (error=(char*)rctx->errors.first(); error;
- error=(char*)rctx->errors.next()) {
- free(error);
- }
-#endif
}
- if (dcr) {
- free_dcr(dcr);
+ if (ok) {
+ Dmsg1(dbglvl, "OK dev found. Vol=%s\n", rctx.VolumeName);
+ } else {
+ Dmsg0(dbglvl, "Leave find_suit_dev: no dev found.\n");
}
return ok;
}
* Search for a particular storage device with particular storage
* characteristics (MediaType).
*/
-static int search_res_for_device(RCTX &rctx)
+int search_res_for_device(RCTX &rctx)
{
AUTOCHANGER *changer;
- BSOCK *dir = rctx.jcr->dir_bsock;
- bool ok;
int stat;
- Dmsg1(100, "Search res for %s\n", rctx.device_name);
- if (!rctx.available_autochanger) {
- foreach_res(rctx.device, R_DEVICE) {
- Dmsg1(100, "Try res=%s\n", rctx.device->hdr.name);
- /* Find resource, and make sure we were able to open it */
- if (fnmatch(rctx.device_name, rctx.device->hdr.name, 0) == 0) {
- stat = reserve_device(rctx);
- if (stat != 1) {
- return stat;
- }
- Dmsg1(220, "Got: %s", dir->msg);
- bash_spaces(rctx.device_name);
- ok = bnet_fsend(dir, OK_device, rctx.device_name);
- Dmsg1(100, ">dird dev: %s", dir->msg);
- return ok ? 1 : -1;
- }
- }
- }
+ Dmsg1(dbglvl, "search res for %s\n", rctx.device_name);
+ /* Look through Autochangers first */
foreach_res(changer, R_AUTOCHANGER) {
- Dmsg1(100, "Try changer res=%s\n", changer->hdr.name);
+ Dmsg1(dbglvl, "Try match changer res=%s\n", changer->hdr.name);
/* Find resource, and make sure we were able to open it */
- if (fnmatch(rctx.device_name, changer->hdr.name, 0) == 0) {
+ if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
/* Try each device in this AutoChanger */
foreach_alist(rctx.device, changer->device) {
- Dmsg1(100, "Try changer device %s\n", rctx.device->hdr.name);
+ Dmsg1(dbglvl, "Try changer device %s\n", rctx.device->hdr.name);
+ if (rctx.store->append && rctx.device->read_only) {
+ continue;
+ }
+ if (!rctx.device->autoselect) {
+ Dmsg1(100, "Device %s not autoselect skipped.\n",
+ rctx.device->hdr.name);
+ continue; /* device is not available */
+ }
stat = reserve_device(rctx);
- if (stat == -1) { /* hard error */
- return -1;
+ if (stat != 1) { /* try another device */
+ continue;
+ }
+ /* Debug code */
+ if (rctx.store->append) {
+ Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
+ rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
+ } else {
+ Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
+ rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
}
- if (stat == 0) { /* must wait, try next one */
+ return stat;
+ }
+ }
+ }
+
+ /* Now if requested look through regular devices */
+ if (!rctx.autochanger_only) {
+ foreach_res(rctx.device, R_DEVICE) {
+ Dmsg1(dbglvl, "Try match res=%s\n", rctx.device->hdr.name);
+ /* Find resource, and make sure we were able to open it */
+ if (strcmp(rctx.device_name, rctx.device->hdr.name) == 0) {
+ stat = reserve_device(rctx);
+ if (stat != 1) { /* try another device */
continue;
}
- POOL_MEM dev_name;
- Dmsg1(100, "Device %s opened.\n", rctx.device_name);
- pm_strcpy(dev_name, rctx.device->hdr.name);
- bash_spaces(dev_name);
- ok = bnet_fsend(dir, OK_device, dev_name.c_str()); /* Return real device name */
- Dmsg1(100, ">dird changer: %s", dir->msg);
- return ok ? 1 : -1;
+ /* Debug code */
+ if (rctx.store->append) {
+ Dmsg2(dbglvl, "Device %s reserved=%d for append.\n",
+ rctx.device->hdr.name, rctx.jcr->dcr->dev->num_reserved());
+ } else {
+ Dmsg2(dbglvl, "Device %s reserved=%d for read.\n",
+ rctx.device->hdr.name, rctx.jcr->read_dcr->dev->num_reserved());
+ }
+ return stat;
}
}
}
- return 0; /* nothing found */
+ return -1; /* nothing found */
+}
+
+/*
+ * Walk through the autochanger resources and check if
+ * the volume is in one of them.
+ *
+ * Returns: true if volume is in device
+ * false otherwise
+ */
+static bool is_vol_in_autochanger(RCTX &rctx, VOLRES *vol)
+{
+ AUTOCHANGER *changer = vol->dev->device->changer_res;
+
+ if (!changer) {
+ return false;
+ }
+
+ /* Find resource, and make sure we were able to open it */
+ if (strcmp(rctx.device_name, changer->hdr.name) == 0) {
+ Dmsg1(dbglvl, "Found changer device %s\n", vol->dev->device->hdr.name);
+ return true;
+ }
+ Dmsg1(dbglvl, "Incorrect changer device %s\n", changer->hdr.name);
+ return false;
}
+
/*
* Try to reserve a specific device.
*
const int name_len = MAX_NAME_LENGTH;
/* Make sure MediaType is OK */
+ Dmsg2(dbglvl, "chk MediaType device=%s request=%s\n",
+ rctx.device->media_type, rctx.store->media_type);
if (strcmp(rctx.device->media_type, rctx.store->media_type) != 0) {
return -1;
}
+ /* Make sure device exists -- i.e. we can stat() it */
if (!rctx.device->dev) {
rctx.device->dev = init_dev(rctx.jcr, rctx.device);
}
rctx.device_name);
}
return -1; /* no use waiting */
- }
- Dmsg1(100, "Found device %s\n", rctx.device->hdr.name);
- dcr = new_dcr(rctx.jcr, rctx.device->dev);
+ } else if (!rctx.device->dev->enabled) {
+ Jmsg(rctx.jcr, M_WARNING, 0, _("\n"
+ " Device \"%s\" requested by DIR is disabled.\n"),
+ rctx.device_name);
+ return -1; /* no use waiting */
+ }
+
+ rctx.suitable_device = true;
+ Dmsg1(dbglvl, "try reserve %s\n", rctx.device->hdr.name);
+ if (rctx.store->append) {
+ dcr = new_dcr(rctx.jcr, rctx.jcr->dcr, rctx.device->dev, SD_APPEND);
+ } else {
+ dcr = new_dcr(rctx.jcr, rctx.jcr->read_dcr, rctx.device->dev, SD_READ);
+ }
if (!dcr) {
BSOCK *dir = rctx.jcr->dir_bsock;
- bnet_fsend(dir, _("3926 Could not get dcr for device: %s\n"), rctx.device_name);
- Dmsg1(100, ">dird: %s", dir->msg);
+ dir->fsend(_("3926 Could not get dcr for device: %s\n"), rctx.device_name);
+ Dmsg1(dbglvl, ">dird: %s", dir->msg);
return -1;
}
- rctx.jcr->dcr = dcr;
bstrncpy(dcr->pool_name, rctx.store->pool_name, name_len);
bstrncpy(dcr->pool_type, rctx.store->pool_type, name_len);
bstrncpy(dcr->media_type, rctx.store->media_type, name_len);
bstrncpy(dcr->dev_name, rctx.device_name, name_len);
- if (rctx.store->append == SD_APPEND) {
- if (rctx.exact_match && !rctx.have_volume) {
+ if (rctx.store->append) {
+ Dmsg2(dbglvl, "call reserve for append: have_vol=%d vol=%s\n", rctx.have_volume, rctx.VolumeName);
+ ok = reserve_device_for_append(dcr, rctx);
+ if (!ok) {
+ goto bail_out;
+ }
+
+ rctx.jcr->dcr = dcr;
+ Dmsg5(dbglvl, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
+ dcr->dev->num_reserved(),
+ dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
+ Dmsg3(dbglvl, "Vol=%s num_writers=%d, have_vol=%d\n",
+ rctx.VolumeName, dcr->dev->num_writers, rctx.have_volume);
+ if (rctx.have_volume) {
+ Dmsg0(dbglvl, "Call reserve_volume for append.\n");
+ if (reserve_volume(dcr, rctx.VolumeName)) {
+ Dmsg1(dbglvl, "Reserved vol=%s\n", rctx.VolumeName);
+ } else {
+ Dmsg1(dbglvl, "Could not reserve vol=%s\n", rctx.VolumeName);
+ goto bail_out;
+ }
+ } else {
dcr->any_volume = true;
+ Dmsg0(dbglvl, "no vol, call find_next_appendable_vol.\n");
if (dir_find_next_appendable_volume(dcr)) {
- Dmsg1(200, "Looking for Volume=%s\n", dcr->VolumeName);
bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
rctx.have_volume = true;
+ Dmsg1(dbglvl, "looking for Volume=%s\n", rctx.VolumeName);
} else {
- Dmsg0(200, "No next volume found\n");
+ dcr->dev->clear_wait();
+ Dmsg0(dbglvl, "No next volume found\n");
+ rctx.have_volume = false;
rctx.VolumeName[0] = 0;
- }
+ /*
+ * If there is at least one volume that is valid and in use,
+ * but we get here, check if we are running with prefers
+ * non-mounted drives. In that case, we have selected a
+ * non-used drive and our one and only volume is mounted
+ * elsewhere, so we bail out and retry using that drive.
+ */
+ if (dcr->found_in_use() && !rctx.PreferMountedVols) {
+ rctx.PreferMountedVols = true;
+ if (dcr->VolumeName[0]) {
+ dcr->unreserve_device(false);
+ }
+ goto bail_out;
+ }
+ /*
+ * Note. Under some circumstances, the Director can hand us
+ * a Volume name that is not the same as the one on the current
+ * drive, and in that case, the call above to find the next
+ * volume will fail because in attempting to reserve the Volume
+ * the code will realize that we already have a tape mounted,
+ * and it will fail. This *should* only happen if there are
+ * writers, thus the following test. In that case, we simply
+ * bail out, and continue waiting, rather than plunging on
+ * and hoping that the operator can resolve the problem.
+ */
+ if (dcr->dev->num_writers != 0) {
+ if (dcr->VolumeName[0]) {
+ dcr->unreserve_device(false);
+ }
+ goto bail_out;
+ }
+ }
}
- ok = reserve_device_for_append(dcr, rctx);
- Dmsg3(200, "dev_name=%s mediatype=%s ok=%d\n", dcr->dev_name, dcr->media_type, ok);
} else {
ok = reserve_device_for_read(dcr);
+ if (ok) {
+ rctx.jcr->read_dcr = dcr;
+ Dmsg5(dbglvl, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
+ dcr->dev->num_reserved(),
+ dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
+ }
}
if (!ok) {
- free_dcr(rctx.jcr->dcr);
- return 0;
- }
- return 1;
-}
-
-/*
- * We "reserve" the drive by setting the ST_READ bit. No one else
- * should touch the drive until that is cleared.
- * This allows the DIR to "reserve" the device before actually
- * starting the job.
- */
-static bool reserve_device_for_read(DCR *dcr)
-{
- DEVICE *dev = dcr->dev;
- JCR *jcr = dcr->jcr;
- bool ok = false;
-
- ASSERT(dcr);
-
- dev->block(BST_DOING_ACQUIRE);
-
- if (is_device_unmounted(dev)) {
- Dmsg1(200, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
- Mmsg(jcr->errmsg, _("Device %s is BLOCKED due to user unmount.\n"),
- dev->print_name());
goto bail_out;
}
- if (dev->is_busy()) {
- Dmsg4(200, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n", dev->print_name(),
- dev->state & ST_READ?1:0, dev->num_writers, dev->reserved_device);
- Mmsg1(jcr->errmsg, _("Device %s is busy.\n"),
- dev->print_name());
- goto bail_out;
+ if (rctx.notify_dir) {
+ POOL_MEM dev_name;
+ BSOCK *dir = rctx.jcr->dir_bsock;
+ pm_strcpy(dev_name, rctx.device->hdr.name);
+ bash_spaces(dev_name);
+ ok = dir->fsend(OK_device, dev_name.c_str()); /* Return real device name */
+ Dmsg1(dbglvl, ">dird: %s", dir->msg);
+ if (!ok) {
+ dcr->unreserve_device(false);
+ }
+ } else {
+ ok = true;
}
-
- dev->clear_append();
- dev->set_read();
- ok = true;
+ return ok ? 1 : -1;
bail_out:
- dev->unblock();
- return ok;
+ rctx.have_volume = false;
+ rctx.VolumeName[0] = 0;
+ Dmsg0(dbglvl, "Not OK.\n");
+ return 0;
}
/*
- * We reserve the device for appending by incrementing the
- * reserved_device. We do virtually all the same work that
+ * We reserve the device for appending by incrementing
+ * num_reserved(). We do virtually all the same work that
* is done in acquire_device_for_append(), but we do
* not attempt to mount the device. This routine allows
- * the DIR to reserve multiple devices before *really*
- * starting the job. It also permits the SD to refuse
+ * the DIR to reserve multiple devices before *really*
+ * starting the job. It also permits the SD to refuse
* certain devices (not up, ...).
*
* Note, in reserving a device, if the device is for the
DEVICE *dev = dcr->dev;
bool ok = false;
- ASSERT(dcr);
+ ASSERT2(dcr, "No dcr in reserve_device_for_append!");
+ if (job_canceled(jcr)) {
+ return false;
+ }
- dev->block(BST_DOING_ACQUIRE);
+ dev->Lock();
- if (dev->can_read()) {
- Mmsg1(jcr->errmsg, _("Device %s is busy reading.\n"), dev->print_name());
- Dmsg1(100, "%s", jcr->errmsg);
+ /* If device is being read or reserved for read, we cannot write it */
+ if (dev->can_read() || dev->is_reserved_for_read()) {
+ Mmsg(jcr->errmsg, _("3603 JobId=%u %s device %s is busy reading.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Failed: %s", jcr->errmsg);
goto bail_out;
}
- if (is_device_unmounted(dev)) {
- Mmsg(jcr->errmsg, _("Device %s is BLOCKED due to user unmount.\n"), dev->print_name());
- Dmsg1(100, "%s", jcr->errmsg);
+ /* If device is unmounted, we are out of luck */
+ if (dev->is_device_unmounted()) {
+ Mmsg(jcr->errmsg, _("3604 JobId=%u %s device %s is BLOCKED due to user unmount.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Failed: %s", jcr->errmsg);
goto bail_out;
}
- Dmsg1(190, "reserve_append device is %s\n", dev->is_tape()?"tape":"disk");
+ Dmsg2(dbglvl, "reserve_append %s device is %s\n", dev->print_type(), dev->print_name());
+ /* Now do detailed tests ... */
if (can_reserve_drive(dcr, rctx) != 1) {
- Dmsg1(100, "%s", jcr->errmsg);
+ Dmsg0(dbglvl, "can_reserve_drive!=1\n");
goto bail_out;
}
- dev->reserved_device++;
- Dmsg1(200, "Inc reserve=%d\n", dev->reserved_device);
- dcr->reserved_device = true;
+ /* Note: on failure this returns jcr->errmsg properly edited */
+ if (generate_plugin_event(jcr, bsdEventDeviceTryOpen, dcr) != bRC_OK) {
+ queue_reserve_message(jcr);
+ goto bail_out;
+ }
+ dcr->set_reserved_for_append();
ok = true;
bail_out:
- dev->unblock();
+ dev->Unlock();
return ok;
}
+/*
+ * We "reserve" the drive by setting the ST_READ bit. No one else
+ * should touch the drive until that is cleared.
+ * This allows the DIR to "reserve" the device before actually
+ * starting the job.
+ */
+static bool reserve_device_for_read(DCR *dcr)
+{
+ DEVICE *dev = dcr->dev;
+ JCR *jcr = dcr->jcr;
+ bool ok = false;
+
+ ASSERT2(dcr, "No dcr in reserve_device_for_read!");
+ if (job_canceled(jcr)) {
+ return false;
+ }
+
+ dev->Lock();
+
+ if (dev->is_device_unmounted()) {
+ Mmsg(jcr->errmsg, _("3601 JobId=%u %s device %s is BLOCKED due to user unmount.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Device %s is BLOCKED due to user unmount.\n", dev->print_name());
+ goto bail_out;
+ }
+
+ if (dev->is_busy()) {
+ Mmsg(jcr->errmsg, _("3602 JobId=%u %s device %s is busy (already reading/writing)."
+ " read=%d, writers=%d reserved=%d\n"),
+ jcr->JobId, dev->print_type(), dev->print_name(),
+ dev->state & ST_READ?1:0, dev->num_writers, dev->num_reserved());
+ queue_reserve_message(jcr);
+ Dmsg4(dbglvl, "Device %s is busy ST_READ=%d num_writers=%d reserved=%d.\n",
+ dev->print_name(),
+ dev->state & ST_READ?1:0, dev->num_writers, dev->num_reserved());
+ goto bail_out;
+ }
+
+ /* Note: on failure this returns jcr->errmsg properly edited */
+ if (generate_plugin_event(jcr, bsdEventDeviceTryOpen, dcr) != bRC_OK) {
+ queue_reserve_message(jcr);
+ goto bail_out;
+ }
+ dev->clear_append();
+ dcr->set_reserved_for_read();
+ ok = true;
+
+bail_out:
+ dev->Unlock();
+ return ok;
+}
+
+static bool is_max_jobs_ok(DCR *dcr)
+{
+ DEVICE *dev = dcr->dev;
+ JCR *jcr = dcr->jcr;
+
+ Dmsg5(dbglvl, "MaxJobs=%d Jobs=%d reserves=%d Status=%s Vol=%s\n",
+ dcr->VolCatInfo.VolCatMaxJobs,
+ dcr->VolCatInfo.VolCatJobs, dev->num_reserved(),
+ dcr->VolCatInfo.VolCatStatus,
+ dcr->VolumeName);
+ /* Limit max concurrent jobs on this drive */
+ if (dev->max_concurrent_jobs > 0 && dev->max_concurrent_jobs <=
+ (uint32_t)(dev->num_writers + dev->num_reserved())) {
+ /* Max Concurrent Jobs depassed or already reserved */
+ Mmsg(jcr->errmsg, _("3609 JobId=%u Max concurrent jobs=%d exceeded on %s device %s.\n"),
+ (uint32_t)jcr->JobId, dev->max_concurrent_jobs,
+ dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Failed: %s", jcr->errmsg);
+ return false;
+ }
+ if (strcmp(dcr->VolCatInfo.VolCatStatus, "Recycle") == 0) {
+ return true;
+ }
+
+ if (dcr->VolCatInfo.VolCatMaxJobs > 0 && dcr->VolCatInfo.VolCatMaxJobs <=
+ (dcr->VolCatInfo.VolCatJobs + dev->num_reserved())) {
+ /* Max Job Vols depassed or already reserved */
+ Mmsg(jcr->errmsg, _("3611 JobId=%u Volume max jobs=%d exceeded on %s device %s.\n"),
+ (uint32_t)jcr->JobId, dcr->VolCatInfo.VolCatMaxJobs,
+ dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "reserve dev failed: %s", jcr->errmsg);
+ return false; /* wait */
+ }
+ return true;
+}
+
+
+static int is_pool_ok(DCR *dcr)
+{
+ DEVICE *dev = dcr->dev;
+ JCR *jcr = dcr->jcr;
+
+ /* Now check if we want the same Pool and pool type */
+ if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
+ strcmp(dev->pool_type, dcr->pool_type) == 0) {
+ /* OK, compatible device */
+ Dmsg1(dbglvl, "OK dev: %s num_writers=0, reserved, pool matches\n", dev->print_name());
+ return 1;
+ } else {
+ /* Drive Pool not suitable for us */
+ Mmsg(jcr->errmsg, _(
+"3608 JobId=%u wants Pool=\"%s\" but have Pool=\"%s\" nreserve=%d on %s device %s.\n"),
+ (uint32_t)jcr->JobId, dcr->pool_name, dev->pool_name,
+ dev->num_reserved(), dev->print_type(), dev->print_name());
+ Dmsg1(dbglvl, "Failed: %s", jcr->errmsg);
+ queue_reserve_message(jcr);
+ }
+ return 0;
+}
+
/*
* Returns: 1 if drive can be reserved
* 0 if we should wait
- * -1 on error
+ * -1 on error or impossibility
*/
-static int can_reserve_drive(DCR *dcr, RCTX &rctx)
+static int can_reserve_drive(DCR *dcr, RCTX &rctx)
{
DEVICE *dev = dcr->dev;
JCR *jcr = dcr->jcr;
- /* Check for prefer mounted volumes */
- if (rctx.PreferMountedVols && !dev->VolHdr.VolumeName[0] && dev->is_tape()) {
- Mmsg0(jcr->errmsg, _("Want mounted Volume, drive is empty\n"));
- Dmsg0(200, "want mounted -- no vol\n");
- return 0; /* No volume mounted */
- }
+ Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
+ rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
+ rctx.autochanger_only, rctx.any_drive);
- /* Check for exact Volume name match */
- if (rctx.exact_match && rctx.have_volume &&
- strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) != 0) {
- Mmsg2(jcr->errmsg, _("Not exact match have=%s want=%s\n"),
- dev->VolHdr.VolumeName, rctx.VolumeName);
- Dmsg2(200, "Not exact match have=%s want=%s\n",
- dev->VolHdr.VolumeName, rctx.VolumeName);
+ /* Check for max jobs on this Volume */
+ if (!is_max_jobs_ok(dcr)) {
return 0;
}
+ /* setting any_drive overrides PreferMountedVols flag */
+ if (!rctx.any_drive) {
+ /*
+ * When PreferMountedVols is set, we keep track of the
+ * drive in use that has the least number of writers, then if
+ * no unmounted drive is found, we try that drive. This
+ * helps spread the load to the least used drives.
+ */
+ if (rctx.try_low_use_drive && dev == rctx.low_use_drive) {
+ Dmsg2(dbglvl, "OK dev=%s == low_drive=%s.\n",
+ dev->print_name(), rctx.low_use_drive->print_name());
+ return 1;
+ }
+ /* If he wants a free drive, but this one is busy, no go */
+ if (!rctx.PreferMountedVols && dev->is_busy()) {
+ /* Save least used drive */
+ if ((dev->num_writers + dev->num_reserved()) < rctx.num_writers) {
+ rctx.num_writers = dev->num_writers + dev->num_reserved();
+ rctx.low_use_drive = dev;
+ Dmsg2(dbglvl, "set low use drive=%s num_writers=%d\n",
+ dev->print_name(), rctx.num_writers);
+ } else {
+ Dmsg1(dbglvl, "not low use num_writers=%d\n", dev->num_writers+dev->num_reserved());
+ }
+ Mmsg(jcr->errmsg, _("3605 JobId=%u wants free drive but %s device %s is busy.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Failed: %s", jcr->errmsg);
+ return 0;
+ }
+
+ /* Check for prefer mounted volumes */
+ if (rctx.PreferMountedVols && !dev->vol && dev->is_tape()) {
+ Mmsg(jcr->errmsg, _("3606 JobId=%u prefers mounted drives, but %s device %s has no Volume.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Failed: %s", jcr->errmsg);
+ return 0; /* No volume mounted */
+ }
+
+ /* Check for exact Volume name match */
+ /* ***FIXME*** for Disk, we can accept any volume that goes with this
+ * drive.
+ */
+ if (rctx.exact_match && rctx.have_volume) {
+ bool ok;
+ Dmsg5(dbglvl, "PrefMnt=%d exact=%d suitable=%d chgronly=%d any=%d\n",
+ rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
+ rctx.autochanger_only, rctx.any_drive);
+ Dmsg4(dbglvl, "have_vol=%d have=%s resvol=%s want=%s\n",
+ rctx.have_volume, dev->VolHdr.VolumeName,
+ dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
+ ok = strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) == 0 ||
+ (dev->vol && strcmp(dev->vol->vol_name, rctx.VolumeName) == 0);
+ if (!ok) {
+ Mmsg(jcr->errmsg, _("3607 JobId=%u wants Vol=\"%s\" drive has Vol=\"%s\" on %s device %s.\n"),
+ jcr->JobId, rctx.VolumeName, dev->VolHdr.VolumeName,
+ dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg3(dbglvl, "not OK: dev have=%s resvol=%s want=%s\n",
+ dev->VolHdr.VolumeName, dev->vol?dev->vol->vol_name:"*none*", rctx.VolumeName);
+ return 0;
+ }
+ if (!dcr->can_i_use_volume()) {
+ return 0; /* fail if volume on another drive */
+ }
+ }
+ }
+
/* Check for unused autochanger drive */
- if (rctx.available_autochanger && dev->num_writers == 0 &&
+ if (rctx.autochanger_only && !dev->is_busy() &&
dev->VolHdr.VolumeName[0] == 0) {
/* Device is available but not yet reserved, reserve it for us */
+ Dmsg1(dbglvl, "OK Res Unused autochanger %s.\n", dev->print_name());
bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
return 1; /* reserve drive */
*/
if (dev->num_writers == 0) {
/* Now check if there are any reservations on the drive */
- if (dev->reserved_device) {
- /* Now check if we want the same Pool and pool type */
- if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
- strcmp(dev->pool_type, dcr->pool_type) == 0) {
- /* OK, compatible device */
- Dmsg0(200, "got dev: num_writers=0, reserved, pool matches\n");
- return 1;
- } else {
- /* Drive not suitable for us */
- Mmsg2(jcr->errmsg, _("Drive busy wrong pool: num_writers=0, reserved, pool=%s wanted=%s\n"),
- dev->pool_name, dcr->pool_name);
- Dmsg2(200, "busy: num_writers=0, reserved, pool=%s wanted=%s\n",
- dev->pool_name, dcr->pool_name);
- return 0; /* wait */
- }
+ if (dev->num_reserved()) {
+ return is_pool_ok(dcr);
} else if (dev->can_append()) {
- /* Device in append mode, check if changing pool */
- if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
- strcmp(dev->pool_type, dcr->pool_type) == 0) {
- Dmsg0(200, "got dev: num_writers=0, can_append, pool matches\n");
- /* OK, compatible device */
+ if (is_pool_ok(dcr)) {
return 1;
} else {
/* Changing pool, unload old tape if any in drive */
- Dmsg0(200, "got dev: num_writers=0, reserved, pool change\n");
- unload_autochanger(dcr, 0);
+ Dmsg0(dbglvl, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
+ /* ***FIXME*** use set_unload() */
+ unload_autochanger(dcr, -1);
}
}
/* Device is available but not yet reserved, reserve it for us */
+ Dmsg1(dbglvl, "OK Dev avail reserved %s\n", dev->print_name());
bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
return 1; /* reserve drive */
* available if pool is the same).
*/
if (dev->can_append() || dev->num_writers > 0) {
- Dmsg0(190, "device already in append.\n");
- /* Yes, now check if we want the same Pool and pool type */
- if (strcmp(dev->pool_name, dcr->pool_name) == 0 &&
- strcmp(dev->pool_type, dcr->pool_type) == 0) {
- Dmsg0(200, "got dev: num_writers>=0, can_append, pool matches\n");
- /* OK, compatible device */
- return 1;
- } else {
- /* Drive not suitable for us */
- Mmsg(jcr->errmsg, _("Wanted Pool \"%s\", but device %s is using Pool \"%s\" .\n"),
- dcr->pool_name, dev->print_name(), dev->pool_name);
- Dmsg2(200, "busy: num_writers>0, can_append, pool=%s wanted=%s\n",
- dev->pool_name, dcr->pool_name);
- return 0; /* wait */
- }
+ return is_pool_ok(dcr);
} else {
- Pmsg0(000, _("Logic error!!!! Should not get here.\n"));
+ Pmsg1(000, _("Logic error!!!! JobId=%u Should not get here.\n"), (int)jcr->JobId);
+ Mmsg(jcr->errmsg, _("3910 JobId=%u Logic error!!!! %s device %s Should not get here.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
return -1; /* error, should not get here */
}
-
+ Mmsg(jcr->errmsg, _("3911 JobId=%u failed reserve %s device %s.\n"),
+ jcr->JobId, dev->print_type(), dev->print_name());
+ queue_reserve_message(jcr);
+ Dmsg1(dbglvl, "Failed: No reserve %s\n", dev->print_name());
return 0;
}
+
+
+/*
+ * Queue a reservation error or failure message for this jcr
+ */
+static void queue_reserve_message(JCR *jcr)
+{
+ int i;
+ alist *msgs;
+ char *msg;
+
+ jcr->lock();
+
+ msgs = jcr->reserve_msgs;
+ if (!msgs) {
+ goto bail_out;
+ }
+ /*
+ * Look for duplicate message. If found, do
+ * not insert
+ */
+ for (i=msgs->size()-1; i >= 0; i--) {
+ msg = (char *)msgs->get(i);
+ if (!msg) {
+ goto bail_out;
+ }
+ /* Comparison based on 4 digit message number */
+ if (strncmp(msg, jcr->errmsg, 4) == 0) {
+ goto bail_out;
+ }
+ }
+ /* Message unique, so insert it */
+ jcr->reserve_msgs->push(bstrdup(jcr->errmsg));
+
+bail_out:
+ jcr->unlock();
+}
+
+/*
+ * Send any reservation messages queued for this jcr
+ */
+void send_drive_reserve_messages(JCR *jcr, void sendit(const char *msg, int len, void *sarg), void *arg)
+{
+ int i;
+ alist *msgs;
+ char *msg;
+
+ jcr->lock();
+ msgs = jcr->reserve_msgs;
+ if (!msgs || msgs->size() == 0) {
+ goto bail_out;
+ }
+ for (i=msgs->size()-1; i >= 0; i--) {
+ msg = (char *)msgs->get(i);
+ if (msg) {
+ sendit(" ", 3, arg);
+ sendit(msg, strlen(msg), arg);
+ } else {
+ break;
+ }
+ }
+
+bail_out:
+ jcr->unlock();
+}
+
+/*
+ * Pop and release any reservations messages
+ */
+static void pop_reserve_messages(JCR *jcr)
+{
+ alist *msgs;
+ char *msg;
+
+ jcr->lock();
+ msgs = jcr->reserve_msgs;
+ if (!msgs) {
+ goto bail_out;
+ }
+ while ((msg = (char *)msgs->pop())) {
+ free(msg);
+ }
+bail_out:
+ jcr->unlock();
+}
+
+/*
+ * Also called from acquire.c
+ */
+void release_reserve_messages(JCR *jcr)
+{
+ pop_reserve_messages(jcr);
+ jcr->lock();
+ if (!jcr->reserve_msgs) {
+ goto bail_out;
+ }
+ delete jcr->reserve_msgs;
+ jcr->reserve_msgs = NULL;
+
+bail_out:
+ jcr->unlock();
+}
projects / bacula / bacula / blobdiff