/*
Bacula® - The Network Backup Solution
- Copyright (C) 2002-2007 Free Software Foundation Europe e.V.
+ Copyright (C) 2002-2008 Free Software Foundation Europe e.V.
The main author of Bacula is Kern Sibbald, with contributions from
many others, a complete list can be found in the file AUTHORS.
/* Forward referenced functions */
static void attach_dcr_to_dev(DCR *dcr);
+static bool is_tape_position_ok(JCR *jcr, DEVICE *dev);
/*********************************************************************
int vol_label_status;
int retry = 0;
- Dmsg1(50, "jcr->dcr=%p\n", jcr->dcr);
- dev->block(BST_DOING_ACQUIRE);
+ Dmsg1(950, "jcr->dcr=%p\n", jcr->dcr);
+ 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"),
* 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(50, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
if (dcr->media_type[0] && strcmp(dcr->media_type, dev->device->media_type) != 0) {
RCTX rctx;
DIRSTORE *store;
int stat;
- DCR *dcr_save = jcr->dcr;
Jmsg3(jcr, M_INFO, 0, _("Changing device. Want Media Type=\"%s\" have=\"%s\"\n"
" device=%s\n"),
dcr->media_type, dev->device->media_type, dev->print_name());
+ Dmsg3(50, "Changing 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();
- jcr->dcr = NULL;
memset(&rctx, 0, sizeof(RCTX));
rctx.jcr = jcr;
jcr->reserve_msgs = New(alist(10, not_owned_by_alist));
bstrncpy(store->pool_type, dcr->pool_type, sizeof(store->pool_type));
store->append = false;
rctx.store = store;
+ clean_device(dcr); /* clean up the dcr */
/*
- * Note, if search_for_device() succeeds, we get a new_dcr,
- * which we do not use except for the dev info.
+ * Search for a new device
*/
stat = search_res_for_device(rctx);
- release_msgs(jcr); /* release queued messages */
+ release_reserve_messages(jcr); /* release queued messages */
unlock_reservations();
+
if (stat == 1) {
- DCR *new_dcr = jcr->read_dcr;
- dev->unblock(dev_unlocked);
- detach_dcr_from_dev(dcr); /* release old device */
- /* Copy important info from the new dcr */
- dev = dcr->dev = new_dcr->dev;
- jcr->read_dcr = dcr;
- dcr->device = new_dcr->device;
- dcr->max_job_spool_size = dcr->device->max_job_spool_size;
- attach_dcr_to_dev(dcr);
- new_dcr->VolumeName[0] = 0;
- free_dcr(new_dcr);
- dev->block(BST_DOING_ACQUIRE);
+ 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 device %s chosen.\n"),
dev->print_name());
+ Dmsg1(50, "Media Type change. New device %s chosen.\n", dev->print_name());
+
bstrncpy(dcr->VolumeName, vol->VolumeName, sizeof(dcr->VolumeName));
bstrncpy(dcr->media_type, vol->MediaType, sizeof(dcr->media_type));
dcr->VolCatInfo.Slot = vol->Slot;
bstrncpy(dcr->pool_name, store->pool_name, sizeof(dcr->pool_name));
bstrncpy(dcr->pool_type, store->pool_type, sizeof(dcr->pool_type));
- } else if (stat == 0) { /* device busy */
- Pmsg1(000, "Device %s is busy.\n", vol->device);
} else {
/* error */
Jmsg1(jcr, M_FATAL, 0, _("No suitable device found to read Volume \"%s\"\n"),
vol->VolumeName);
- jcr->dcr = dcr_save;
+ Dmsg1(50, "No suitable device found to read Volume \"%s\"\n", vol->VolumeName);
goto get_out;
}
- jcr->dcr = dcr_save;
}
dev->print_name(), dcr->VolumeName, dev->bstrerror());
goto default_path;
}
- Dmsg1(100, "opened dev %s OK\n", dev->print_name());
+ Dmsg1(50, "opened dev %s OK\n", dev->print_name());
/* Read Volume Label */
-
- Dmsg0(200, "calling read-vol-label\n");
+ Dmsg0(50, "calling read-vol-label\n");
vol_label_status = read_dev_volume_label(dcr);
switch (vol_label_status) {
case VOL_OK:
/* Mount a specific volume and no other */
Dmsg0(200, "calling dir_ask_sysop\n");
- if (!dir_ask_sysop_to_mount_volume(dcr)) {
+ if (!dir_ask_sysop_to_mount_volume(dcr, ST_READ)) {
goto get_out; /* error return */
}
try_autochanger = true; /* permit using autochanger again */
get_out:
dev->dlock();
- if (dcr->reserved_device) {
+ if (dcr && dcr->reserved_device) {
dev->reserved_device--;
- Dmsg2(100, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
+ Dmsg2(50, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
dcr->reserved_device = false;
}
- dev->unblock(dev_locked);
- Dmsg1(50, "jcr->dcr=%p\n", jcr->dcr);
+ /*
+ * 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);
+ }
+ Dmsg1(950, "jcr->dcr=%p\n", jcr->dcr);
return ok;
}
*/
DCR *acquire_device_for_append(DCR *dcr)
{
- bool release = false;
- bool recycle = false;
- bool do_mount = false;
DEVICE *dev = dcr->dev;
JCR *jcr = dcr->jcr;
init_device_wait_timers(dcr);
- dev->block(BST_DOING_ACQUIRE);
- Dmsg1(190, "acquire_append device is %s\n", dev->is_tape()?"tape":
+ dev->dblock(BST_DOING_ACQUIRE);
+ Dmsg1(100, "acquire_append device is %s\n", dev->is_tape()?"tape":
(dev->is_dvd()?"DVD":"disk"));
/*
goto get_out;
}
- if (dev->can_append()) {
+ /*
+ * have_vol defines whether or not mount_next_write_volume should
+ * ask the Director again about what Volume to use.
+ */
+ if (dev->can_append() && dcr->is_suitable_volume_mounted() &&
+ strcmp(dcr->VolCatInfo.VolCatStatus, "Recycle") != 0) {
Dmsg0(190, "device already in append.\n");
/*
- * Device already in append mode
- *
- * Check if we have the right Volume mounted
- * OK if current volume info OK
- * OK if next volume matches current volume
- * otherwise mount desired volume obtained from
- * dir_find_next_appendable_volume
- * dev->VolHdr.VolumeName is what is in the drive
- * dcr->VolumeName is what we pass into the routines, or
- * get back from the subroutines.
+ * At this point, the correct tape is already mounted, so
+ * we do not need to do mount_next_write_volume(), unless
+ * we need to recycle the tape.
*/
- bstrncpy(dcr->VolumeName, dev->VolHdr.VolumeName, sizeof(dcr->VolumeName));
- if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE) &&
- !(dir_find_next_appendable_volume(dcr) &&
- strcmp(dev->VolHdr.VolumeName, dcr->VolumeName) == 0)) { /* wrong tape mounted */
- Dmsg2(190, "Wrong tape mounted: %s. wants:%s\n", dev->VolHdr.VolumeName,
- dcr->VolumeName);
- /* Release volume reserved by dir_find_next_appendable_volume() */
- if (dcr->VolumeName[0]) {
- volume_unused(dcr);
- }
- if (dev->num_writers != 0) {
- Jmsg3(jcr, M_FATAL, 0, _("Wanted to append to Volume \"%s\", but device %s is busy writing on \"%s\" .\n"),
- dcr->VolumeName, dev->print_name(), dev->VolHdr.VolumeName);
- Dmsg3(200, "Wanted to append to Volume \"%s\", but device %s is busy writing on \"%s\" .\n",
- dcr->VolumeName, dev->print_name(), dev->VolHdr.VolumeName);
- goto get_out;
- }
- /* Wrong tape mounted, release it, then fall through to get correct one */
- Dmsg0(190, "Wrong tape mounted, release and try mount.\n");
- release = true;
- do_mount = true;
- } else {
- /*
- * At this point, the correct tape is already mounted, so
- * we do not need to do mount_next_write_volume(), unless
- * we need to recycle the tape.
- */
- recycle = strcmp(dcr->VolCatInfo.VolCatStatus, "Recycle") == 0;
- Dmsg1(190, "Correct tape mounted. recycle=%d\n", recycle);
- if (recycle && dev->num_writers != 0) {
- Jmsg(jcr, M_FATAL, 0, _("Cannot recycle volume \"%s\""
- " on device %s because it is in use by another job.\n"),
- dev->VolHdr.VolumeName, dev->print_name());
- goto get_out;
- }
- if (dev->num_writers == 0) {
- memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
- }
-
- /*
- * Insanity check
- *
- * Check to see if the tape position as defined by the OS is
- * the same as our concept. If it is not, we bail out, because
- * it means the user has probably manually rewound the tape.
- * Note, we check only if num_writers == 0, but this code will
- * also work fine for any number of writers. If num_writers > 0,
- * we probably should cancel all jobs using this device, or
- * perhaps even abort the SD, or at a minimum, mark the tape
- * in error. Another strategy with num_writers == 0, would be
- * to rewind the tape and do a new eod() request.
- */
- if (dev->is_tape() && dev->num_writers == 0) {
- int32_t file = dev->get_os_tape_file();
- if (file >= 0 && file != (int32_t)dev->get_file()) {
- Jmsg(jcr, M_FATAL, 0, _("Invalid tape position on volume \"%s\""
- " on device %s. Expected %d, got %d\n"),
- dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
- goto get_out;
- }
- }
- }
+ if (dev->num_writers == 0) {
+ memcpy(&dev->VolCatInfo, &dcr->VolCatInfo, sizeof(dev->VolCatInfo));
+ }
+ if (!is_tape_position_ok(jcr, dev)) {
+ goto get_out;
+ }
} else {
- /* Not already in append mode, so mount the device */
- Dmsg0(190, "Not in append mode, try mount.\n");
- ASSERT(dev->num_writers == 0);
- do_mount = true;
- }
-
- if (do_mount || recycle) {
- Dmsg0(190, "Do mount_next_write_vol\n");
- bool mounted = mount_next_write_volume(dcr, release);
- if (!mounted) {
+ Dmsg1(190, "jid=%u Do mount_next_write_vol\n", (uint32_t)jcr->JobId);
+ if (!dcr->mount_next_write_volume()) {
if (!job_canceled(jcr)) {
/* Reduce "noise" -- don't print if job canceled */
Jmsg(jcr, M_FATAL, 0, _("Could not ready device %s for append.\n"),
dev->print_name());
- Dmsg1(200, "Could not ready device %s for append.\n",
- dev->print_name());
+ Dmsg2(200, "jid=%u Could not ready device %s for append.\n",
+ (uint32_t)jcr->JobId, dev->print_name());
}
goto get_out;
}
jcr->NumWriteVolumes = 1;
}
dev->VolCatInfo.VolCatJobs++; /* increment number of jobs on vol */
- dir_update_volume_info(dcr, false); /* send Volume info to Director */
+ dir_update_volume_info(dcr, false, false); /* send Volume info to Director */
dev->dlock();
if (dcr->reserved_device) {
dev->reserved_device--;
- Dmsg2(100, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
+ Dmsg3(100, "jid=%u Dec reserve=%d dev=%s\n", (uint32_t)jcr->JobId,
+ dev->reserved_device, dev->print_name());
dcr->reserved_device = false;
}
- dev->unblock(dev_locked);
+ dev->dunblock(DEV_LOCKED);
return dcr;
/*
dev->dlock();
if (dcr->reserved_device) {
dev->reserved_device--;
- Dmsg2(100, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
+ Dmsg3(100, "jid=%u Dec reserve=%d dev=%s\n", (uint32_t)jcr->JobId,
+ dev->reserved_device, dev->print_name());
dcr->reserved_device = false;
}
- dev->unblock(dev_locked);
+ dev->dunblock(DEV_LOCKED);
return NULL;
}
+/*
+ * Insanity check
+ *
+ * Check to see if the tape position as defined by the OS is
+ * the same as our concept. If it is not, we bail out, because
+ * it means the user has probably manually rewound the tape.
+ * Note, we check only if num_writers == 0, but this code will
+ * also work fine for any number of writers. If num_writers > 0,
+ * we probably should cancel all jobs using this device, or
+ * perhaps even abort the SD, or at a minimum, mark the tape
+ * in error. Another strategy with num_writers == 0, would be
+ * to rewind the tape and do a new eod() request.
+ */
+static bool is_tape_position_ok(JCR *jcr, DEVICE *dev)
+{
+ if (dev->is_tape() && dev->num_writers == 0) {
+ int32_t file = dev->get_os_tape_file();
+ if (file >= 0 && file != (int32_t)dev->get_file()) {
+ Jmsg(jcr, M_FATAL, 0, _("Invalid tape position on volume \"%s\""
+ " on device %s. Expected %d, got %d\n"),
+ dev->VolHdr.VolumeName, dev->print_name(), dev->get_file(), file);
+ return false;
+ }
+ }
+ return true;
+}
+
/*
* This job is done, so release the device. From a Unix standpoint,
bool ok = true;
/* lock only if not already locked by this thread */
- if (!dcr->dev_locked) {
+ if (!dcr->is_dev_locked()) {
dev->r_dlock();
}
+ lock_volumes();
Dmsg2(100, "release_device device %s is %s\n", dev->print_name(), dev->is_tape()?"tape":"disk");
/* if device is reserved, job never started, so release the reserve here */
if (dev->can_read()) {
dev->clear_read(); /* clear read bit */
Dmsg0(100, "dir_update_vol_info. Release0\n");
- dir_update_volume_info(dcr, false); /* send Volume info to Director */
+ dir_update_volume_info(dcr, false, false); /* send Volume info to Director */
+ volume_unused(dcr);
} else if (dev->num_writers > 0) {
/*
dev->num_writers--;
Dmsg1(100, "There are %d writers in release_device\n", dev->num_writers);
if (dev->is_labeled()) {
- Dmsg0(100, "dir_create_jobmedia_record. Release\n");
+ Dmsg2(200, "dir_create_jobmedia. Release vol=%s dev=%s\n",
+ dev->VolCatInfo.VolCatName, dev->print_name());
if (!dev->at_weot() && !dir_create_jobmedia_record(dcr)) {
Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
dcr->VolCatInfo.VolCatName, jcr->Job);
}
- /* If no more writers, write an EOF */
+ /* If no more writers, and no errors, and wrote something, write an EOF */
if (!dev->num_writers && dev->can_write() && dev->block_num > 0) {
dev->weof(1);
write_ansi_ibm_labels(dcr, ANSI_EOF_LABEL, dev->VolHdr.VolumeName);
if (!dev->at_weot()) {
dev->VolCatInfo.VolCatFiles = dev->file; /* set number of files */
/* Note! do volume update before close, which zaps VolCatInfo */
- Dmsg0(100, "dir_update_vol_info. Release0\n");
- dir_update_volume_info(dcr, false); /* send Volume info to Director */
+ dir_update_volume_info(dcr, false, false); /* send Volume info to Director */
+ Dmsg2(200, "dir_update_vol_info. Release vol=%s dev=%s\n",
+ dev->VolCatInfo.VolCatName, dev->print_name());
+ }
+ if (!dev->num_writers) { /* if no more writers */
+ volume_unused(dcr); /* we obviously are not using the volume */
}
}
* has failed, since the device is not in read mode and
* there are no writers. It was probably reserved.
*/
+ volume_unused(dcr);
}
+ unlock_volumes();
/* If no writers, close if file or !CAP_ALWAYS_OPEN */
if (dev->num_writers == 0 && (!dev->is_tape() || !dev->has_cap(CAP_ALWAYSOPEN))) {
pthread_cond_broadcast(&dev->wait_next_vol);
Dmsg1(100, "JobId=%u broadcast wait_device_release\n", (uint32_t)jcr->JobId);
pthread_cond_broadcast(&wait_device_release);
- dcr->dev_locked = false; /* set no longer locked */
dev->dunlock();
- if (jcr->read_dcr == dcr) {
- jcr->read_dcr = NULL;
- }
- if (jcr->dcr == dcr) {
- jcr->dcr = NULL;
+ if (dcr->keep_dcr) {
+ detach_dcr_from_dev(dcr);
+ } else {
+ if (jcr->read_dcr == dcr) {
+ jcr->read_dcr = NULL;
+ }
+ if (jcr->dcr == dcr) {
+ jcr->dcr = NULL;
+ }
+ free_dcr(dcr);
}
- free_dcr(dcr);
Dmsg2(100, "===== Device %s released by JobId=%u\n", dev->print_name(),
(uint32_t)jcr->JobId);
return ok;
}
+/*
+ * Clean up the device for reuse without freeing the memory
+ */
+bool clean_device(DCR *dcr)
+{
+ bool ok;
+ dcr->keep_dcr = true; /* do not free the dcr */
+ ok = release_device(dcr);
+ dcr->keep_dcr = false;
+ return ok;
+}
+
/*
* Create a new Device Control Record and attach
* it to the device (if this is a real job).
+ * Note, this has been updated so that it can be called first
+ * without a DEVICE, then a second or third time with a DEVICE,
+ * and each time, it should cleanup and point to the new device.
+ * This should facilitate switching devices.
+ * Note, each dcr must point to the controlling job (jcr). However,
+ * a job can have multiple dcrs, so we must not store in the jcr's
+ * structure as previously. The higher level routine must store
+ * this dcr in the right place
+ *
*/
-DCR *new_dcr(JCR *jcr, DEVICE *dev)
+DCR *new_dcr(JCR *jcr, DCR *dcr, DEVICE *dev)
{
- if (jcr) Dmsg2(100, "enter new_dcr JobId=%u dev=%p\n", (uint32_t)jcr->JobId, dev);
- DCR *dcr = (DCR *)malloc(sizeof(DCR));
- memset(dcr, 0, sizeof(DCR));
- dcr->jcr = jcr;
- if (dev) {
+ if (!dcr) {
+ dcr = (DCR *)malloc(sizeof(DCR));
+ memset(dcr, 0, sizeof(DCR));
dcr->tid = pthread_self();
- dcr->dev = dev;
- dcr->device = dev->device;
+ dcr->spool_fd = -1;
+ }
+ dcr->jcr = jcr; /* point back to jcr */
+ /* Set device information, possibly change device */
+ if (dev) {
+ if (dcr->block) {
+ free_block(dcr->block);
+ }
dcr->block = new_block(dev);
+ if (dcr->rec) {
+ free_record(dcr->rec);
+ }
dcr->rec = new_record();
- dcr->max_job_spool_size = dev->device->max_job_spool_size;
+ if (dcr->attached_to_dev) {
+ detach_dcr_from_dev(dcr);
+ }
+ /* Use job spoolsize prior to device spoolsize */
+ if (jcr->spool_size) {
+ dcr->max_job_spool_size = jcr->spool_size;
+ } else {
+ dcr->max_job_spool_size = dev->device->max_job_spool_size;
+ }
+ dcr->device = dev->device;
+ dcr->dev = dev;
attach_dcr_to_dev(dcr);
}
- dcr->spool_fd = -1;
return dcr;
}
* Search the dcrs list for the given dcr. If it is found,
* as it should be, then remove it. Also zap the jcr pointer
* to the dcr if it is the same one.
+ *
+ * Note, this code will be turned on when we can write to multiple
+ * dcrs at the same time.
*/
#ifdef needed
static void remove_dcr_from_dcrs(DCR *dcr)
void detach_dcr_from_dev(DCR *dcr)
{
- Dmsg1(500, "JobId=%u enter detach_dcr_from_dev\n", (uint32_t)dcr->jcr->JobId);
- unreserve_device(dcr);
+ DEVICE *dev = dcr->dev;
+ Dmsg0(500, "Enter detach_dcr_from_dev\n"); /* jcr is NULL in some cases */
/* Detach this dcr only if attached */
- if (dcr->attached_to_dev) {
+ if (dcr->attached_to_dev && dev) {
+ dev->dlock();
+ unreserve_device(dcr);
dcr->dev->attached_dcrs->remove(dcr); /* detach dcr from device */
dcr->attached_to_dev = false;
// remove_dcr_from_dcrs(dcr); /* remove dcr from jcr list */
+ dev->dunlock();
}
}
{
JCR *jcr = dcr->jcr;
- if (dcr->dev) {
- detach_dcr_from_dev(dcr);
- }
+ detach_dcr_from_dev(dcr);
if (dcr->block) {
free_block(dcr->block);
projects / bacula / bacula / blobdiff