-/*
- * Routines to acquire and release a device for read/write
- *
- * Kern Sibbald, August MMII
- *
- * Version $Id$
- */
/*
Bacula® - The Network Backup Solution
many others, a complete list can be found in the file AUTHORS.
This program is Free Software; you can redistribute it and/or
modify it under the terms of version two of the GNU General Public
- License as published by the Free Software Foundation plus additions
- that are listed in the file LICENSE.
+ License as published by the Free Software Foundation and included
+ in the file LICENSE.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
(FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
Switzerland, email:ftf@fsfeurope.org.
*/
+/*
+ * Routines to acquire and release a device for read/write
+ *
+ * Kern Sibbald, August MMII
+ *
+ * Version $Id$
+ */
#include "bacula.h" /* pull in global headers */
#include "stored.h" /* pull in Storage Deamon headers */
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(100, "MediaType dcr=%s dev=%s\n", dcr->media_type, dev->device->media_type);
+ 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;
+ dcr->keep_dcr = true; /* do not free the dcr */
+ release_device(dcr);
+ dcr->keep_dcr = false;
/*
- * 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();
- 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:
dcr->VolumeName, dev->print_name());
get_out:
- P(dev->mutex);
- if (dcr->reserved_device) {
+ dev->dlock();
+ 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;
}
- V(dev->mutex);
- dev->unblock();
- Dmsg1(50, "jcr->dcr=%p\n", jcr->dcr);
+ dev->dunblock(DEV_LOCKED);
+ Dmsg1(950, "jcr->dcr=%p\n", jcr->dcr);
return ok;
}
init_device_wait_timers(dcr);
- dev->block(BST_DOING_ACQUIRE);
+ dev->dblock(BST_DOING_ACQUIRE);
Dmsg1(190, "acquire_append device is %s\n", dev->is_tape()?"tape":
(dev->is_dvd()?"DVD":"disk"));
dcr->VolumeName);
/* Release volume reserved by dir_find_next_appendable_volume() */
if (dcr->VolumeName[0]) {
- free_unused_volume(dcr);
+ 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"),
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;
+ }
+ }
}
} else {
/* Not already in append mode, so mount the device */
}
dev->VolCatInfo.VolCatJobs++; /* increment number of jobs on vol */
dir_update_volume_info(dcr, false); /* send Volume info to Director */
- P(dev->mutex);
+ dev->dlock();
if (dcr->reserved_device) {
dev->reserved_device--;
Dmsg2(100, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
dcr->reserved_device = false;
}
- V(dev->mutex);
- dev->unblock();
+ dev->dunblock(DEV_LOCKED);
return dcr;
/*
* Error return
*/
get_out:
- P(dev->mutex);
+ dev->dlock();
if (dcr->reserved_device) {
dev->reserved_device--;
Dmsg2(100, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
dcr->reserved_device = false;
}
- V(dev->mutex);
- dev->unblock();
+ dev->dunblock(DEV_LOCKED);
return NULL;
}
bool ok = true;
/* lock only if not already locked by this thread */
- if (!dcr->dev_locked) {
- lock_device(dev);
+ if (!dcr->is_dev_locked()) {
+ dev->r_dlock();
}
Dmsg2(100, "release_device device %s is %s\n", dev->print_name(), dev->is_tape()?"tape":"disk");
if (status != 0) {
berrno be;
Jmsg(jcr, M_ALERT, 0, _("3997 Bad alert command: %s: ERR=%s.\n"),
- alert, be.strerror(status));
+ alert, be.bstrerror(status));
}
Dmsg1(400, "alert status=%d\n", status);
free_pool_memory(alert);
}
- dcr->dev_locked = false; /* set no longer locked */
- unlock_device(dev);
- if (jcr->read_dcr == dcr) {
- jcr->read_dcr = NULL;
- }
- if (jcr->dcr == dcr) {
- jcr->dcr = NULL;
+ 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);
+ dev->dunlock();
+ 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;
}
/*
* 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)
{
- DCR *dcr = (DCR *)malloc(sizeof(DCR));
- memset(dcr, 0, sizeof(DCR));
- dcr->jcr = jcr;
+ if (!dcr) {
+ dcr = (DCR *)malloc(sizeof(DCR));
+ memset(dcr, 0, sizeof(DCR));
+ dcr->tid = pthread_self();
+ dcr->spool_fd = -1;
+ }
+ dcr->jcr = jcr; /* point back to jcr */
+ /* Set device information, possibly change device */
if (dev) {
- dcr->dev = dev;
- dcr->device = dev->device;
+ if (dcr->block) {
+ free_block(dcr->block);
+ }
dcr->block = new_block(dev);
+ if (dcr->rec) {
+ free_record(dcr->rec);
+ }
dcr->rec = new_record();
+ if (dcr->attached_to_dev) {
+ detach_dcr_from_dev(dcr);
+ }
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)
DEVICE *dev = dcr->dev;
JCR *jcr = dcr->jcr;
- if (!dcr->attached_to_dev && dev->is_open() && jcr && jcr->JobType != JT_SYSTEM) {
+ if (jcr) Dmsg1(500, "JobId=%u enter attach_dcr_to_dev\n", (uint32_t)jcr->JobId);
+ if (!dcr->attached_to_dev && dev->initiated && jcr && jcr->JobType != JT_SYSTEM) {
dev->attached_dcrs->append(dcr); /* attach dcr to device */
dcr->attached_to_dev = true;
+ Dmsg1(500, "JobId=%u attach_dcr_to_dev\n", (uint32_t)jcr->JobId);
}
}
void detach_dcr_from_dev(DCR *dcr)
{
DEVICE *dev = dcr->dev;
-
- if (dcr->reserved_device) {
- dcr->reserved_device = false;
- lock_device(dev);
- dev->reserved_device--;
- Dmsg2(100, "Dec reserve=%d dev=%s\n", dev->reserved_device, dev->print_name());
- dcr->reserved_device = false;
- /* If we set read mode in reserving, remove it */
- if (dev->can_read()) {
- dev->clear_read();
- }
- if (dev->num_writers < 0) {
- Jmsg1(dcr->jcr, M_ERROR, 0, _("Hey! num_writers=%d!!!!\n"), dev->num_writers);
- dev->num_writers = 0;
- }
- unlock_device(dev);
- }
+ Dmsg1(500, "JobId=%u enter detach_dcr_from_dev\n", (uint32_t)dcr->jcr->JobId);
/* 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();
}
- free_unused_volume(dcr); /* free unused vols attached to this dcr */
- pthread_cond_broadcast(&dcr->dev->wait_next_vol);
- pthread_cond_broadcast(&wait_device_release);
}
/*
{
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