/*********************************************************************
* Acquire device for reading.
* The drive should have previously been reserved by calling
* reserve_device_for_read(). We read the Volume label from the block and
* leave the block pointers just after the label.
*
* Returns: NULL if failed for any reason
* dcr if successful
*/
bool acquire_device_for_read(DCR *dcr)
{
DEVICE *dev;
JCR *jcr = dcr->jcr;
bool ok = false;
bool tape_previously_mounted;
VOL_LIST *vol;
bool try_autochanger = true;
int i;
int vol_label_status;
int retry = 0;
Enter(rdbglvl);
dev = dcr->dev;
dev->Lock_read_acquire();
Dmsg2(rdbglvl, "dcr=%p dev=%p\n", dcr, dcr->dev);
Dmsg2(rdbglvl, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
dev->dblock(BST_DOING_ACQUIRE);
if (dev->num_writers > 0) {
Jmsg2(jcr, M_FATAL, 0, _("Acquire read: num_writers=%d not zero. Job %d canceled.\n"),
dev->num_writers, jcr->JobId);
goto get_out;
}
/* Find next Volume, if any */
vol = jcr->VolList;
if (!vol) {
char ed1[50];
Jmsg(jcr, M_FATAL, 0, _("No volumes specified for reading. Job %s canceled.\n"),
edit_int64(jcr->JobId, ed1));
goto get_out;
}
jcr->CurReadVolume++;
for (i=1; i<jcr->CurReadVolume; i++) {
vol = vol->next;
}
if (!vol) {
Jmsg(jcr, M_FATAL, 0, _("Logic error: no next volume to read. Numvol=%d Curvol=%d\n"),
jcr->NumReadVolumes, jcr->CurReadVolume);
goto get_out; /* should not happen */
}
set_dcr_from_vol(dcr, vol);
Dmsg2(rdbglvl, "Want Vol=%s Slot=%d\n", vol->VolumeName, vol->Slot);
/*
* If the MediaType requested for this volume is not the
* same as the current drive, we attempt to find the same
* device that was used to write the orginal volume. If
* found, we switch to using that device.
*
* N.B. A lot of routines rely on the dcr pointer not changing
* read_records.c even has multiple dcrs cached, so we take care
* here to release all important parts of the dcr and re-acquire
* them such as the block pointer (size may change), but we do
* not release the dcr.
*/
Dmsg2(rdbglvl, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
if (dcr->media_type[0] && !bstrcmp(dcr->media_type, dev->device->media_type)) {
RCTX rctx;
DIRSTORE *store;
int status;
Jmsg3(jcr, M_INFO, 0, _("Changing read device. Want Media Type=\"%s\" have=\"%s\"\n"
" device=%s\n"),
dcr->media_type, dev->device->media_type, dev->print_name());
Dmsg3(rdbglvl, "Changing read device. Want Media Type=\"%s\" have=\"%s\"\n"
" device=%s\n",
dcr->media_type, dev->device->media_type, dev->print_name());
dev->dunblock(DEV_UNLOCKED);
lock_reservations();
memset(&rctx, 0, sizeof(RCTX));
rctx.jcr = jcr;
jcr->read_dcr = dcr;
jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
rctx.any_drive = true;
rctx.device_name = vol->device;
store = new DIRSTORE;
memset(store, 0, sizeof(DIRSTORE));
store->name[0] = 0; /* No dir name */
bstrncpy(store->media_type, vol->MediaType, sizeof(store->media_type));
bstrncpy(store->pool_name, dcr->pool_name, sizeof(store->pool_name));
bstrncpy(store->pool_type, dcr->pool_type, sizeof(store->pool_type));
store->append = false;
rctx.store = store;
clean_device(dcr); /* clean up the dcr */
/*
* Search for a new device
*/
status = search_res_for_device(rctx);
release_reserve_messages(jcr); /* release queued messages */
unlock_reservations();
if (status == 1) { /* found new device to use */
/*
* Switching devices, so acquire lock on new device,
* then release the old one.
*/
dcr->dev->Lock_read_acquire(); /* lock new one */
dev->Unlock_read_acquire(); /* release old one */
dev = dcr->dev; /* get new device pointer */
dev->dblock(BST_DOING_ACQUIRE);
dcr->VolumeName[0] = 0;
Jmsg(jcr, M_INFO, 0, _("Media Type change. New read device %s chosen.\n"),
dev->print_name());
Dmsg1(50, "Media Type change. New read device %s chosen.\n", dev->print_name());
bstrncpy(dcr->VolumeName, vol->VolumeName, sizeof(dcr->VolumeName));
dcr->setVolCatName(vol->VolumeName);
bstrncpy(dcr->media_type, vol->MediaType, sizeof(dcr->media_type));
dcr->VolCatInfo.Slot = vol->Slot;
dcr->VolCatInfo.InChanger = vol->Slot > 0;
bstrncpy(dcr->pool_name, store->pool_name, sizeof(dcr->pool_name));
bstrncpy(dcr->pool_type, store->pool_type, sizeof(dcr->pool_type));
} else {
/* error */
Jmsg1(jcr, M_FATAL, 0, _("No suitable device found to read Volume \"%s\"\n"),
vol->VolumeName);
Dmsg1(rdbglvl, "No suitable device found to read Volume \"%s\"\n", vol->VolumeName);
goto get_out;
}
}
Dmsg2(rdbglvl, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
dev->clear_unload();
if (dev->vol && dev->vol->is_swapping()) {
dev->vol->set_slot(vol->Slot);
Dmsg3(rdbglvl, "swapping: slot=%d Vol=%s dev=%s\n", dev->vol->get_slot(),
dev->vol->vol_name, dev->print_name());
}
init_device_wait_timers(dcr);
tape_previously_mounted = dev->can_read() || dev->can_append() ||
dev->is_labeled();
// tape_initially_mounted = tape_previously_mounted;
/* Volume info is always needed because of VolParts */
Dmsg1(rdbglvl, "dir_get_volume_info vol=%s\n", dcr->VolumeName);
if (!dcr->dir_get_volume_info(GET_VOL_INFO_FOR_READ)) {
Dmsg2(rdbglvl, "dir_get_vol_info failed for vol=%s: %s\n",
dcr->VolumeName, jcr->errmsg);
Jmsg1(jcr, M_WARNING, 0, "Read acquire: %s", jcr->errmsg);
}
dev->set_load(); /* set to load volume */
for ( ;; ) {
/* If not polling limit retries */
if (!dev->poll && retry++ > 10) {
break;
}
dev->clear_labeled(); /* force reread of label */
if (job_canceled(jcr)) {
char ed1[50];
Mmsg1(dev->errmsg, _("Job %s canceled.\n"), edit_int64(jcr->JobId, ed1));
Jmsg(jcr, M_INFO, 0, dev->errmsg);
goto get_out; /* error return */
}
dcr->do_unload();
dcr->do_swapping(false/*!is_writing*/);
dcr->do_load(false /*!is_writing*/);
set_dcr_from_vol(dcr, vol); /* refresh dcr with desired volume info */
/*
* This code ensures that the device is ready for
* reading. If it is a file, it opens it.
* If it is a tape, it checks the volume name
*/
Dmsg1(rdbglvl, "stored: open vol=%s\n", dcr->VolumeName);
if (!dev->open(dcr, OPEN_READ_ONLY)) {
if (!dev->poll) {
Jmsg3(jcr, M_WARNING, 0, _("Read open device %s Volume \"%s\" failed: ERR=%s\n"),
dev->print_name(), dcr->VolumeName, dev->bstrerror());
}
goto default_path;
}
Dmsg1(rdbglvl, "opened dev %s OK\n", dev->print_name());
/* Read Volume Label */
Dmsg0(rdbglvl, "calling read-vol-label\n");
vol_label_status = read_dev_volume_label(dcr);
switch (vol_label_status) {
case VOL_OK:
Dmsg0(rdbglvl, "Got correct volume.\n");
ok = true;
dev->VolCatInfo = dcr->VolCatInfo; /* structure assignment */
break; /* got it */
case VOL_IO_ERROR:
Dmsg0(rdbglvl, "IO Error\n");
/*
* Send error message generated by read_dev_volume_label()
* only we really had a tape mounted. This supresses superfluous
* error messages when nothing is mounted.
*/
if (tape_previously_mounted) {
Jmsg(jcr, M_WARNING, 0, "Read acquire: %s", jcr->errmsg);
}
goto default_path;
case VOL_NAME_ERROR:
Dmsg3(rdbglvl, "Vol name=%s want=%s drv=%s.\n", dev->VolHdr.VolumeName,
dcr->VolumeName, dev->print_name());
if (dev->is_volume_to_unload()) {
goto default_path;
}
dev->set_unload(); /* force unload of unwanted tape */
if (!unload_autochanger(dcr, -1)) {
/* at least free the device so we can re-open with correct volume */
dev->close(dcr);
free_volume(dev);
}
dev->set_load();
/* Fall through */
default:
Jmsg1(jcr, M_WARNING, 0, "Read acquire: %s", jcr->errmsg);
default_path:
Dmsg0(rdbglvl, "default path\n");
tape_previously_mounted = true;
/*
* If the device requires mount, close it, so the device can be ejected.
*/
if (dev->requires_mount()) {
dev->close(dcr);
free_volume(dev);
}
/* Call autochanger only once unless ask_sysop called */
if (try_autochanger) {
int status;
Dmsg2(rdbglvl, "calling autoload Vol=%s Slot=%d\n",
dcr->VolumeName, dcr->VolCatInfo.Slot);
status = autoload_device(dcr, 0, NULL);
if (status > 0) {
try_autochanger = false;
continue; /* try reading volume mounted */
}
}
/* Mount a specific volume and no other */
Dmsg0(rdbglvl, "calling dir_ask_sysop\n");
if (!dcr->dir_ask_sysop_to_mount_volume(ST_READREADY)) {
goto get_out; /* error return */
}
/* Volume info is always needed because of VolParts */
Dmsg1(150, "dir_get_volume_info vol=%s\n", dcr->VolumeName);
if (!dcr->dir_get_volume_info(GET_VOL_INFO_FOR_READ)) {
Dmsg2(150, "dir_get_vol_info failed for vol=%s: %s\n",
dcr->VolumeName, jcr->errmsg);
Jmsg1(jcr, M_WARNING, 0, "Read acquire: %s", jcr->errmsg);
}
dev->set_load(); /* set to load volume */
try_autochanger = true; /* permit trying the autochanger again */
continue; /* try reading again */
} /* end switch */
break;
} /* end for loop */
if (!ok) {
Jmsg1(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s for reading.\n"),
dev->print_name());
goto get_out;
}
dev->clear_append();
dev->set_read();
jcr->sendJobStatus(JS_Running);
Jmsg(jcr, M_INFO, 0, _("Ready to read from volume \"%s\" on device %s.\n"),
dcr->VolumeName, dev->print_name());
get_out:
dev->Lock();
dcr->clear_reserved();
/*
* Normally we are blocked, but in at least one error case above
* we are not blocked because we unsuccessfully tried changing
* devices.
*/
if (dev->is_blocked()) {
dev->dunblock(DEV_LOCKED);
} else {
dev->Unlock(); /* dunblock() unlock the device too */
}
Dmsg2(rdbglvl, "dcr=%p dev=%p\n", dcr, dcr->dev);
Dmsg2(rdbglvl, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
dev->Unlock_read_acquire();
Leave(rdbglvl);
return ok;
}
void *device_initialization(void *arg)
{
DEVRES *device;
DCR *dcr;
JCR *jcr;
DEVICE *dev;
int errstat;
LockRes();
pthread_detach(pthread_self());
jcr = new_jcr(sizeof(JCR), stored_free_jcr);
new_plugins(jcr); /* instantiate plugins */
jcr->setJobType(JT_SYSTEM);
/*
* Initialize job start condition variable
*/
errstat = pthread_cond_init(&jcr->job_start_wait, NULL);
if (errstat != 0) {
berrno be;
Jmsg1(jcr, M_ABORT, 0, _("Unable to init job start cond variable: ERR=%s\n"), be.bstrerror(errstat));
}
/*
* Initialize job end condition variable
*/
errstat = pthread_cond_init(&jcr->job_end_wait, NULL);
if (errstat != 0) {
berrno be;
Jmsg1(jcr, M_ABORT, 0, _("Unable to init job endstart cond variable: ERR=%s\n"), be.bstrerror(errstat));
}
foreach_res(device, R_DEVICE) {
Dmsg1(90, "calling init_dev %s\n", device->device_name);
dev = init_dev(NULL, device);
Dmsg1(10, "SD init done %s\n", device->device_name);
if (!dev) {
Jmsg1(NULL, M_ERROR, 0, _("Could not initialize %s\n"), device->device_name);
continue;
}
jcr->dcr = dcr = new_dcr(jcr, NULL, dev, NULL);
generate_plugin_event(jcr, bsdEventDeviceInit, dcr);
if (dev->is_autochanger()) {
/* If autochanger set slot in dev structure */
get_autochanger_loaded_slot(dcr);
}
if (device->cap_bits & CAP_ALWAYSOPEN) {
Dmsg1(20, "calling first_open_device %s\n", dev->print_name());
if (!first_open_device(dcr)) {
Jmsg1(NULL, M_ERROR, 0, _("Could not open device %s\n"), dev->print_name());
Dmsg1(20, "Could not open device %s\n", dev->print_name());
free_dcr(dcr);
jcr->dcr = NULL;
continue;
}
}
if (device->cap_bits & CAP_AUTOMOUNT && dev->is_open()) {
switch (read_dev_volume_label(dcr)) {
case VOL_OK:
memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
volume_unused(dcr); /* mark volume "released" */
break;
default:
Jmsg1(NULL, M_WARNING, 0, _("Could not mount device %s\n"), dev->print_name());
break;
}
}
free_dcr(dcr);
jcr->dcr = NULL;
}
int DCR::check_volume_label(bool &ask, bool &autochanger)
{
int vol_label_status;
/*
* If we are writing to a stream device, ASSUME the volume label
* is correct.
*/
if (dev->has_cap(CAP_STREAM)) {
vol_label_status = VOL_OK;
create_volume_label(dev, VolumeName, "Default", false /* not DVD */);
dev->VolHdr.LabelType = PRE_LABEL;
} else {
vol_label_status = read_dev_volume_label(this);
}
if (job_canceled(jcr)) {
goto check_bail_out;
}
Dmsg2(150, "Want dirVol=%s dirStat=%s\n", VolumeName,
VolCatInfo.VolCatStatus);
/*
* At this point, dev->VolCatInfo has what is in the drive, if anything,
* and dcr->VolCatInfo has what the Director wants.
*/
switch (vol_label_status) {
case VOL_OK:
Dmsg1(150, "Vol OK name=%s\n", dev->VolHdr.VolumeName);
dev->VolCatInfo = VolCatInfo; /* structure assignment */
break; /* got a Volume */
case VOL_NAME_ERROR:
VOLUME_CAT_INFO dcrVolCatInfo, devVolCatInfo;
char saveVolumeName[MAX_NAME_LENGTH];
Dmsg2(150, "Vol NAME Error Have=%s, want=%s\n", dev->VolHdr.VolumeName, VolumeName);
if (dev->is_volume_to_unload()) {
ask = true;
goto check_next_volume;
}
/* If not removable, Volume is broken */
if (!dev->is_removable()) {
Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
VolumeName, dev->print_name());
mark_volume_in_error();
goto check_next_volume;
}
/*
* OK, we got a different volume mounted. First save the
* requested Volume info (dcr) structure, then query if
* this volume is really OK. If not, put back the desired
* volume name, mark it not in changer and continue.
*/
dcrVolCatInfo = VolCatInfo; /* structure assignment */
devVolCatInfo = dev->VolCatInfo; /* structure assignment */
/* Check if this is a valid Volume in the pool */
bstrncpy(saveVolumeName, VolumeName, sizeof(saveVolumeName));
bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
if (!dir_get_volume_info(this, GET_VOL_INFO_FOR_WRITE)) {
POOL_MEM vol_info_msg;
pm_strcpy(vol_info_msg, jcr->dir_bsock->msg); /* save error message */
/* Restore desired volume name, note device info out of sync */
/* This gets the info regardless of the Pool */
bstrncpy(VolumeName, dev->VolHdr.VolumeName, sizeof(VolumeName));
if (autochanger && !dir_get_volume_info(this, GET_VOL_INFO_FOR_READ)) {
/*
* If we get here, we know we cannot write on the Volume,
* and we know that we cannot read it either, so it
* is not in the autochanger.
*/
mark_volume_not_inchanger();
}
dev->VolCatInfo = devVolCatInfo; /* structure assignment */
dev->set_unload(); /* unload this volume */
Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
" Current Volume \"%s\" not acceptable because:\n"
" %s"),
dcrVolCatInfo.VolCatName, dev->VolHdr.VolumeName,
vol_info_msg.c_str());
ask = true;
/* Restore saved DCR before continuing */
bstrncpy(VolumeName, saveVolumeName, sizeof(VolumeName));
VolCatInfo = dcrVolCatInfo; /* structure assignment */
goto check_next_volume;
}
/*
* This was not the volume we expected, but it is OK with
* the Director, so use it.
*/
Dmsg1(150, "Got new Volume name=%s\n", VolumeName);
dev->VolCatInfo = VolCatInfo; /* structure assignment */
Dmsg1(100, "Call reserve_volume=%s\n", dev->VolHdr.VolumeName);
if (reserve_volume(this, dev->VolHdr.VolumeName) == NULL) {
Jmsg2(jcr, M_WARNING, 0, _("Could not reserve volume %s on %s\n"),
dev->VolHdr.VolumeName, dev->print_name());
ask = true;
goto check_next_volume;
}
break; /* got a Volume */
/*
* At this point, we assume we have a blank tape mounted.
*/
case VOL_IO_ERROR:
if (dev->is_dvd()) {
Jmsg(jcr, M_FATAL, 0, "%s", jcr->errmsg);
mark_volume_in_error();
goto check_bail_out; /* we could not write on DVD */
}
/* Fall through wanted */
case VOL_NO_LABEL:
switch (try_autolabel(true)) {
case try_next_vol:
goto check_next_volume;
case try_read_vol:
goto check_read_volume;
case try_error:
goto check_bail_out;
case try_default:
break;
}
/* NOTE! Fall-through wanted. */
case VOL_NO_MEDIA:
default:
Dmsg0(200, "VOL_NO_MEDIA or default.\n");
/* Send error message */
if (!dev->poll) {
} else {
Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
}
ask = true;
/* Needed, so the medium can be changed */
if (dev->requires_mount()) {
dev->close();
}
goto check_next_volume;
}
return check_ok;
check_next_volume:
return check_next_vol;
check_bail_out:
return check_error;
check_read_volume:
return check_read_vol;
}
