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 ammended with additional clauses defined in the
+ 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,
/* Reserve context */
class RCTX {
public:
- alist *errors;
JCR *jcr;
char *device_name;
DIRSTORE *store;
DEVRES *device;
- bool PreferMountedVols;
+ DEVICE *low_use_drive; /* Low use drive candidate */
+ int num_writers; /* for selecting low use drive */
+ bool try_low_use_drive; /* see if low use drive available */
+ bool any_drive; /* Accept any drive if set */
+ bool PreferMountedVols; /* Prefer volumes already mounted */
+ bool exact_match; /* Want exact volume */
+ bool have_volume; /* Have DIR suggested vol name */
+ bool suitable_device; /* at least one device is suitable */
+ bool autochanger_only; /* look at autochangers only */
+ char VolumeName[MAX_NAME_LENGTH]; /* Vol name suggested by DIR */
};
static dlist *vol_list = NULL;
static pthread_mutex_t vol_list_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_mutex_t search_lock = PTHREAD_MUTEX_INITIALIZER;
/* Forward referenced functions */
-static int can_reserve_drive(DCR *dcr, bool PerferMountedVols);
+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 bool reserve_device_for_append(DCR *dcr, bool PreferMountedVols);
+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);
* Return: VOLRES entry on success
* NULL if the Volume is already in the list
*/
-VOLRES *new_volume(const char *VolumeName, DEVICE *dev)
+VOLRES *new_volume(DCR *dcr, const char *VolumeName)
{
VOLRES *vol, *nvol;
+
+ Dmsg1(400, "new_volume %s\n", VolumeName);
+ P(vol_list_lock);
+ if (dcr->dev) {
+again:
+ foreach_dlist(vol, vol_list) {
+ if (vol && vol->dev == dcr->dev) {
+ vol_list->remove(vol);
+ if (vol->vol_name) {
+ free(vol->vol_name);
+ }
+ free(vol);
+ goto again;
+ }
+ }
+ }
vol = (VOLRES *)malloc(sizeof(VOLRES));
memset(vol, 0, sizeof(VOLRES));
vol->vol_name = bstrdup(VolumeName);
- vol->dev = dev;
- P(vol_list_lock);
+ vol->dev = dcr->dev;
+ vol->dcr = dcr;
nvol = (VOLRES *)vol_list->binary_insert(vol, my_compare);
- V(vol_list_lock);
if (nvol != vol) {
free(vol->vol_name);
free(vol);
- if (dev) {
- nvol->dev = dev;
+ vol = NULL;
+ if (dcr->dev) {
+ nvol->dev = dcr->dev;
}
- return NULL;
}
+ V(vol_list_lock);
return vol;
}
VOLRES *find_volume(const char *VolumeName)
{
VOLRES vol, *fvol;
- vol.vol_name = bstrdup(VolumeName);
P(vol_list_lock);
+ vol.vol_name = bstrdup(VolumeName);
fvol = (VOLRES *)vol_list->binary_search(&vol, my_compare);
- V(vol_list_lock);
free(vol.vol_name);
+ V(vol_list_lock);
return fvol;
}
{
VOLRES vol, *fvol;
+ P(vol_list_lock);
if (dev->VolHdr.VolumeName[0] == 0) {
- return false;
+ /*
+ * Our device has no VolumeName listed, but
+ * search the list for any Volume attached to
+ * this device and remove it.
+ */
+ foreach_dlist(fvol, vol_list) {
+ if (fvol && fvol->dev == dev) {
+ vol_list->remove(fvol);
+ if (fvol->vol_name) {
+ free(fvol->vol_name);
+ }
+ free(fvol);
+ break;
+ }
+ }
+ goto bail_out;
}
+ 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;
+bail_out:
+ V(vol_list_lock);
return fvol != NULL;
}
+/* Free volume reserved by this dcr but not attached to a dev */
+void free_unused_volume(DCR *dcr)
+{
+ 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;
+ }
+ }
+ V(vol_list_lock);
+}
+
/*
* List Volumes -- this should be moved to status.c
*/
{
VOLRES *vol;
for (vol=(VOLRES *)vol_list->first(); vol; vol=(VOLRES *)vol_list->next(vol)) {
- bnet_fsend(user, "%s\n", vol->vol_name);
+ 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);
+ }
}
}
/* Create the Volume list */
void create_volume_list()
{
- VOLRES *dummy;
+ VOLRES *dummy = NULL;
if (vol_list == NULL) {
vol_list = New(dlist(dummy, &dummy->link));
}
void free_volume_list()
{
VOLRES *vol;
+ if (!vol_list) {
+ return;
+ }
for (vol=(VOLRES *)vol_list->first(); vol; vol=(VOLRES *)vol_list->next(vol)) {
- Dmsg1(000, "Unreleased Volume=%s\n", vol->vol_name);
+ Dmsg3(000, "Unreleased Volume=%s dcr=0x%x dev=0x%x\n", vol->vol_name,
+ vol->dcr, vol->dev);
}
delete vol_list;
vol_list = NULL;
}
-bool is_volume_in_use(const char *VolumeName)
+bool is_volume_in_use(DCR *dcr)
{
- VOLRES *vol = find_volume(VolumeName);
+ 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()) {
return false;
}
}
+/*
+ * 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_storage_cmd(JCR *jcr)
{
POOL_MEM store_name, dev_name, media_type, pool_name, pool_type;
int Copy, Stripe;
DIRSTORE *store;
RCTX rctx;
- rctx.jcr = jcr;
-#ifdef implemented
- char *error;
-#endif
+ 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));
do {
+ Dmsg1(100, "<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;
/* Now get all devices */
while (bnet_recv(dir) >= 0) {
+ Dmsg1(100, "<dird device: %s", dir->msg);
ok = sscanf(dir->msg, use_device, dev_name.c_str()) == 1;
if (!ok) {
break;
* Wiffle through them and find one that can do the backup.
*/
if (ok) {
- /*
- * 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;
- ok = find_suitable_device_for_job(jcr, rctx);
- if (ok) {
- goto done;
- }
- if (rctx.PreferMountedVols) {
- rctx.PreferMountedVols = false;
- ok = find_suitable_device_for_job(jcr, rctx);
- if (ok) {
+ bool first = true; /* print wait message once */
+ for ( ; !job_canceled(jcr); ) {
+ rctx.suitable_device = false;
+ rctx.have_volume = false;
+ rctx.any_drive = false;
+ if (!jcr->PreferMountedVols) {
+ /* Look for unused drives in autochangers */
+ rctx.num_writers = 20000000; /* start with impossible number */
+ rctx.low_use_drive = NULL;
+ rctx.PreferMountedVols = false;
+ rctx.exact_match = false;
+ rctx.autochanger_only = true;
+ Dmsg5(100, "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 ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ goto done;
+ }
+ /* 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))) {
+ goto done;
+ }
+ rctx.try_low_use_drive = false;
+ }
+ rctx.autochanger_only = false;
+ Dmsg5(100, "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 ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ goto done;
+ }
+ }
+ /* Look for an exact match all drives */
+ rctx.PreferMountedVols = true;
+ rctx.exact_match = true;
+ rctx.autochanger_only = false;
+ Dmsg5(100, "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 ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ goto done;
+ }
+ /* Look for any mounted drive */
+ rctx.exact_match = false;
+ Dmsg5(100, "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 ((ok = find_suitable_device_for_job(jcr, rctx))) {
goto done;
}
+ /* Try any drive */
+ rctx.any_drive = true;
+ Dmsg5(100, "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 ((ok = find_suitable_device_for_job(jcr, rctx))) {
+ goto done;
+ }
+ if (!rctx.suitable_device || !wait_for_device(jcr, first)) {
+ break; /* Get out, failure ... */
+ }
+ first = false;
+ bnet_sig(dir, BNET_HEARTBEAT); /* Inform Dir that we are alive */
}
+
+ /*
+ * 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.
+ */
if (verbose) {
unbash_spaces(dir->msg);
pm_strcpy(jcr->errmsg, dir->msg);
" 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);
- }
-#endif
- Dmsg1(100, ">dird: %s\n", dir->msg);
+
+ Dmsg1(100, ">dird: %s", dir->msg);
} else {
unbash_spaces(dir->msg);
pm_strcpy(jcr->errmsg, dir->msg);
Jmsg(jcr, M_INFO, 0, _("Failed command: %s\n"), jcr->errmsg);
}
bnet_fsend(dir, BAD_use, jcr->errmsg);
- Dmsg1(100, ">dird: %s\n", dir->msg);
+ Dmsg1(100, ">dird: %s", dir->msg);
}
done:
}
delete jcr->dirstore;
#ifdef implemented
- for (error=(char*)rctx->errors.first(); error;
- error=(char*)rctx->errors.next()) {
+ while (error=(char*)rctx->errors.first()) {
free(error);
}
#endif
*/
bool find_suitable_device_for_job(JCR *jcr, RCTX &rctx)
{
- bool first = true;
- bool ok = false;
- DCR *dcr = NULL;
+ bool ok;
DIRSTORE *store;
char *device_name;
+ /*
+ * For each storage device that the user specified, we
+ * search and see if there is a resource for that device.
+ */
+ Dmsg4(100, "PrefMnt=%d exact=%d suitable=%d chgronly=%d\n",
+ rctx.PreferMountedVols, rctx.exact_match, rctx.suitable_device,
+ rctx.autochanger_only);
init_jcr_device_wait_timers(jcr);
- for ( ;; ) {
- int need_wait = false;
- foreach_alist(store, jcr->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 */
- dcr = jcr->dcr;
- ok = true;
- break;
- } else if (stat == 0) { /* device busy */
- need_wait = true;
- }
- /* otherwise error */
-// rctx->errors.push(bstrdup(jcr->errmsg));
+ ok = false;
+ P(search_lock);
+ foreach_alist(store, jcr->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 */
+ rctx.suitable_device = true;
+ Dmsg1(100, "Suitable device found=%s\n", device_name);
+ ok = true;
+ break;
+ } else if (stat == 0) { /* device busy */
+ Dmsg1(100, "Suitable busy device found=%s\n", device_name);
+ rctx.suitable_device = true; /* but it is busy, so continue looking */
}
+ /* otherwise error */
}
- /*
- * If there is some device for which we can wait, then
- * wait and try again until the wait time expires
- */
- if (!need_wait || !wait_for_device(jcr, first)) {
+ if (ok) {
break;
}
- first = false;
-#ifdef implemented
- for (error=(char*)rctx->errors.first(); error;
- error=(char*)rctx->errors.next()) {
- free(error);
- }
-#endif
- }
- if (!ok && dcr) {
- free_dcr(dcr);
}
+ V(search_lock);
return ok;
}
int stat;
Dmsg1(100, "Search res for %s\n", rctx.device_name);
- 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 &&
- strcmp(rctx.device->media_type, rctx.store->media_type) == 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: %s\n", dir->msg);
- return ok ? 1 : -1;
- }
- }
+ /* Look through Autochangers first */
foreach_res(changer, R_AUTOCHANGER) {
- Dmsg1(100, "Try changer res=%s\n", changer->hdr.name);
+ Dmsg1(150, "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) {
/* Try each device in this AutoChanger */
foreach_alist(rctx.device, changer->device) {
Dmsg1(100, "Try changer device %s\n", rctx.device->hdr.name);
stat = reserve_device(rctx);
- if (stat == -1) { /* hard error */
- return -1;
- }
- if (stat == 0) { /* must wait, try next one */
+ if (stat != 1) { /* try another device */
continue;
}
POOL_MEM dev_name;
- Dmsg1(100, "Device %s opened.\n", rctx.device_name);
+ if (rctx.store->append == SD_APPEND) {
+ Dmsg2(100, "Device %s reserved=%d.\n", rctx.device_name,
+ rctx.jcr->dcr->dev->reserved_device);
+ } else {
+ Dmsg2(100, "Device %s reserved=%d.\n", rctx.device_name,
+ rctx.jcr->read_dcr->dev->reserved_device);
+ }
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: %s\n", dir->msg);
+ Dmsg1(100, ">dird changer: %s", dir->msg);
return ok ? 1 : -1;
}
}
}
- return 0; /* nothing found */
+
+ /* Now if requested look through regular devices */
+ if (!rctx.autochanger_only) {
+ foreach_res(rctx.device, R_DEVICE) {
+ Dmsg1(150, "Try match 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;
+ }
+ }
+ }
+ return -1; /* nothing found */
}
/*
bool ok;
DCR *dcr;
const int name_len = MAX_NAME_LENGTH;
+
+ /* Make sure MediaType is OK */
+ 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);
}
}
return -1; /* no use waiting */
}
- Dmsg1(100, "Found device %s\n", rctx.device->hdr.name);
+
+ Dmsg2(100, "Try reserve %s jobid=%d\n", rctx.device->hdr.name,
+ rctx.jcr->JobId);
dcr = new_dcr(rctx.jcr, rctx.device->dev);
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\n", dir->msg);
+ Dmsg1(100, ">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) {
- ok = reserve_device_for_append(dcr, rctx.PreferMountedVols);
- Dmsg3(200, "dev_name=%s mediatype=%s ok=%d\n", dcr->dev_name, dcr->media_type, ok);
+ if (rctx.exact_match && !rctx.have_volume) {
+ dcr->any_volume = true;
+ if (dir_find_next_appendable_volume(dcr)) {
+ Dmsg1(100, "Looking for Volume=%s\n", dcr->VolumeName);
+ bstrncpy(rctx.VolumeName, dcr->VolumeName, sizeof(rctx.VolumeName));
+ rctx.have_volume = true;
+ } else {
+ Dmsg0(100, "No next volume found\n");
+ rctx.VolumeName[0] = 0;
+ }
+ }
+ ok = reserve_device_for_append(dcr, rctx);
+ if (ok) {
+ rctx.jcr->dcr = dcr;
+ Dmsg5(100, "Reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
+ dcr->dev->reserved_device,
+ dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
+ }
} else {
ok = reserve_device_for_read(dcr);
+ if (ok) {
+ rctx.jcr->read_dcr = dcr;
+ Dmsg5(100, "Read reserved=%d dev_name=%s mediatype=%s pool=%s ok=%d\n",
+ dcr->dev->reserved_device,
+ dcr->dev_name, dcr->media_type, dcr->pool_name, ok);
+ }
}
if (!ok) {
- free_dcr(rctx.jcr->dcr);
+ free_dcr(dcr);
+ Dmsg0(100, "Not OK.\n");
return 0;
}
return 1;
ASSERT(dcr);
- dev->block(BST_DOING_ACQUIRE);
+ P(dev->mutex);
- if (device_is_unmounted(dev)) {
+ 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());
ok = true;
bail_out:
- dev->unblock();
+ V(dev->mutex);
return ok;
}
* the first tor reserve the device, we put the pool
* name and pool type in the device record.
*/
-static bool reserve_device_for_append(DCR *dcr, bool PreferMountedVols)
+static bool reserve_device_for_append(DCR *dcr, RCTX &rctx)
{
JCR *jcr = dcr->jcr;
DEVICE *dev = dcr->dev;
ASSERT(dcr);
- dev->block(BST_DOING_ACQUIRE);
+ P(dev->mutex);
+ /* If device is being read, we cannot write it */
if (dev->can_read()) {
Mmsg1(jcr->errmsg, _("Device %s is busy reading.\n"), dev->print_name());
Dmsg1(100, "%s", jcr->errmsg);
goto bail_out;
}
- if (device_is_unmounted(dev)) {
+ /* If device is unmounted, we are out of luck */
+ 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);
goto bail_out;
}
- Dmsg1(190, "reserve_append device is %s\n", dev->is_tape()?"tape":"disk");
+ Dmsg1(100, "reserve_append device is %s\n", dev->is_tape()?"tape":"disk");
- if (can_reserve_drive(dcr, PreferMountedVols) != 1) {
- Mmsg1(jcr->errmsg, _("Device %s is busy writing on another Volume.\n"), dev->print_name());
- Dmsg1(100, "%s", jcr->errmsg);
+ /* Now do detailed tests ... */
+ if (can_reserve_drive(dcr, rctx) != 1) {
+ Dmsg0(100, "can_reserve_drive!=1\n");
goto bail_out;
}
dev->reserved_device++;
- Dmsg1(200, "============= Inc reserve=%d\n", dev->reserved_device);
+ Dmsg3(100, "Inc reserve=%d dev=%s %p\n", dev->reserved_device,
+ dev->print_name(), dev);
dcr->reserved_device = true;
ok = true;
bail_out:
- dev->unblock();
+ V(dev->mutex);
return ok;
}
/*
* 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, bool PreferMountedVols)
+static int can_reserve_drive(DCR *dcr, RCTX &rctx)
{
DEVICE *dev = dcr->dev;
JCR *jcr = dcr->jcr;
- if (PreferMountedVols && !dev->VolHdr.VolumeName[0] &&
- dev->is_tape() && !dev->is_autochanger()) {
- return 0; /* No volume mounted */
+ Dmsg5(100, "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);
+
+ /* 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) {
+ Dmsg3(100, "OK dev=%s == low_drive=%s. JobId=%d\n",
+ dev->print_name(), rctx.low_use_drive->print_name(), jcr->JobId);
+ 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->reserved_device) < rctx.num_writers) {
+ rctx.num_writers = dev->num_writers + dev->reserved_device;
+ rctx.low_use_drive = dev;
+ Dmsg2(100, "set low use drive=%s num_writers=%d\n", dev->print_name(),
+ rctx.num_writers);
+ } else {
+ Dmsg1(100, "not low use num_writers=%d\n", dev->num_writers+
+ dev->reserved_device);
+ }
+ Dmsg1(100, "failed: !prefMnt && busy. JobId=%d\n", jcr->JobId);
+ return 0;
+ }
+
+ /* Check for prefer mounted volumes */
+ if (rctx.PreferMountedVols && !dev->VolHdr.VolumeName[0] && dev->is_tape()) {
+ Dmsg1(100, "failed: want mounted -- no vol JobId=%d\n", jcr->JobId);
+ return 0; /* No volume mounted */
+ }
+
+ /* Check for exact Volume name match */
+ if (rctx.exact_match && rctx.have_volume &&
+ strcmp(dev->VolHdr.VolumeName, rctx.VolumeName) != 0) {
+ Dmsg2(100, "failed: Not exact match have=%s want=%s\n",
+ dev->VolHdr.VolumeName, rctx.VolumeName);
+ return 0;
+ }
+ }
+
+ /* Check for unused autochanger drive */
+ if (rctx.autochanger_only && dev->num_writers == 0 &&
+ dev->VolHdr.VolumeName[0] == 0) {
+ /* Device is available but not yet reserved, reserve it for us */
+ Dmsg2(100, "OK Res Unused autochanger %s JobId=%d.\n",
+ dev->print_name(), jcr->JobId);
+ 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 */
}
/*
- * Handle the case that the drive is not yet in append mode
+ * Handle the case that there are no writers
*/
- if (!dev->can_append() && dev->num_writers == 0) {
+ if (dev->num_writers == 0) {
/* Now check if there are any reservations on the drive */
if (dev->reserved_device) {
- /* Yes, now check if we want the same Pool and pool type */
+ /* 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 */
+ Dmsg2(100, "OK dev: %s num_writers=0, reserved, pool matches JobId=%d\n",
+ dev->print_name(), jcr->JobId);
+ return 1;
} else {
/* Drive not suitable for us */
+ Dmsg2(100, "failed: busy num_writers=0, reserved, pool=%s wanted=%s\n",
+ dev->pool_name, dcr->pool_name);
return 0; /* wait */
}
- } else {
- /* Device is available but not yet reserved, reserve it for us */
- bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
- bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
+ } 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) {
+ Dmsg2(100, "OK dev: %s num_writers=0, can_append, pool matches. JobId=%d\n",
+ dev->print_name(), jcr->JobId);
+ /* OK, compatible device */
+ return 1;
+ } else {
+ /* Changing pool, unload old tape if any in drive */
+ Dmsg0(100, "OK dev: num_writers=0, not reserved, pool change, unload changer\n");
+ unload_autochanger(dcr, 0);
+ }
}
- return 1; /* reserve drive */
- }
-
- /*
- * Check if device in append mode with no writers (i.e. available)
- */
- if (dev->can_append() && dev->num_writers == 0) {
/* Device is available but not yet reserved, reserve it for us */
+ Dmsg2(100, "OK Dev avail reserved %s JobId=%d\n", dev->print_name(),
+ jcr->JobId);
bstrncpy(dev->pool_name, dcr->pool_name, sizeof(dev->pool_name));
bstrncpy(dev->pool_type, dcr->pool_type, sizeof(dev->pool_type));
- return 1;
+ return 1; /* reserve drive */
}
+
/*
* Check if the device is in append mode with writers (i.e.
* 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) {
+ Dmsg2(100, "OK dev: %s num_writers>=0, can_append, pool matches. JobId=%d\n",
+ dev->print_name(), jcr->JobId);
/* OK, compatible device */
return 1;
} else {
/* Drive not suitable for us */
- Jmsg(jcr, M_WARNING, 0, _("Device %s is busy writing on another Volume.\n"), dev->print_name());
+ Dmsg2(100, "failed: busy num_writers>0, can_append, pool=%s wanted=%s\n",
+ dev->pool_name, dcr->pool_name);
return 0; /* wait */
}
} else {
- Pmsg0(000, "Logic error!!!! Should not get here.\n");
+ Pmsg0(000, _("Logic error!!!! Should not get here.\n"));
Jmsg0(jcr, M_FATAL, 0, _("Logic error!!!! Should not get here.\n"));
return -1; /* error, should not get here */
}
-
+ Dmsg2(100, "failed: No reserve %s JobId=%d\n", dev->print_name(), jcr->JobId);
return 0;
}
projects / bacula / bacula / blobdiff