+/*
+ Bacula® - The Network Backup Solution
+
+ Copyright (C) 2000-2012 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.
+ This program is Free Software; you can redistribute it and/or
+ modify it under the terms of version three of the GNU Affero General Public
+ 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
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+
+ Bacula® is a registered trademark of Kern Sibbald.
+ The licensor of Bacula is the Free Software Foundation Europe
+ (FSFE), Fiduciary Program, Sumatrastrasse 25, 8006 Zürich,
+ Switzerland, email:ftf@fsfeurope.org.
+*/
/*
*
- * Higher Level Device routines.
- * Knows about Bacula tape labels and such
+ * Higher Level Device routines.
+ * Knows about Bacula tape labels and such
*
* NOTE! In general, subroutines that have the word
* "device" in the name do locking. Subroutines
* that have the word "dev" in the name do not
- * do locking. Thus if xxx_device() calls
- * yyy_dev(), all is OK, but if xxx_device()
- * calls yyy_device(), everything will hang.
- * Obviously, no zzz_dev() is allowed to call
- * a www_device() or everything falls apart.
+ * do locking. Thus if xxx_device() calls
+ * yyy_dev(), all is OK, but if xxx_device()
+ * calls yyy_device(), everything will hang.
+ * Obviously, no zzz_dev() is allowed to call
+ * a www_device() or everything falls apart.
*
- * Concerning the routines lock_device() and block_device()
+ * Concerning the routines dev->r_lock()() and block_device()
* see the end of this module for details. In general,
* blocking a device leaves it in a state where all threads
- * other than the current thread block when they attempt to
+ * other than the current thread block when they attempt to
* lock the device. They remain suspended (blocked) until the device
* is unblocked. So, a device is blocked during an operation
* that takes a long time (initialization, mounting a new
* volume, ...) locking a device is done for an operation
- * that takes a short time such as writing data to the
+ * that takes a short time such as writing data to the
* device.
*
*
* Kern Sibbald, MM, MMI
- *
+ *
* Version $Id$
*/
-/*
- Copyright (C) 2000-2003 Kern Sibbald and John Walker
-
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU General Public License as
- published by the Free Software Foundation; either version 2 of
- the License, or (at your option) any later version.
-
- 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 GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public
- License along with this program; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA.
-
- */
#include "bacula.h" /* pull in global headers */
#include "stored.h" /* pull in Storage Deamon headers */
/* Forward referenced functions */
-extern char my_name[];
-extern int debug_level;
-
/*
* This is the dreaded moment. We either have an end of
* medium condition or worse, and error condition.
* Attempt to "recover" by obtaining a new Volume.
*
- * We enter with device locked, and
+ * Here are a few things to know:
+ * dcr->VolCatInfo contains the info on the "current" tape for this job.
+ * dev->VolCatInfo contains the info on the tape in the drive.
+ * The tape in the drive could have changed several times since
+ * the last time the job used it (jcr->VolCatInfo).
+ * dcr->VolumeName is the name of the current/desired tape in the drive.
+ *
+ * We enter with device locked, and
* exit with device locked.
*
- * Note, we are called only from one place in block.c
+ * Note, we are called only from one place in block.c for the daemons.
+ * The btape utility calls it from btape.c.
*
- * Returns: 1 on success
- * 0 on failure
+ * Returns: true on success
+ * false on failure
*/
-int fixup_device_block_write_error(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
+bool fixup_device_block_write_error(DCR *dcr, int retries)
{
- uint32_t stat = 0;
char PrevVolName[MAX_NAME_LENGTH];
- DEV_BLOCK *label_blk = NULL;
+ DEV_BLOCK *label_blk;
+ DEV_BLOCK *block = dcr->block;
char b1[30], b2[30];
time_t wait_time;
+ char dt[MAX_TIME_LENGTH];
+ JCR *jcr = dcr->jcr;
+ DEVICE *dev = dcr->dev;
+ int blocked = dev->blocked(); /* save any previous blocked status */
+ bool ok = false;
wait_time = time(NULL);
- status_dev(dev, &stat);
- if (stat & BMT_EOD) {
- Dmsg0(100, "======= Got EOD ========\n");
-
- block_device(dev, BST_DOING_ACQUIRE);
- /* Unlock, but leave BLOCKED */
- unlock_device(dev);
-
- /*
- * Walk through all attached jcrs creating a jobmedia_record()
- */
- Dmsg1(100, "Walk attached jcrs. Volume=%s\n", dev->VolCatInfo.VolCatName);
- for (JCR *mjcr=NULL; (mjcr=next_attached_jcr(dev, mjcr)); ) {
- Dmsg1(100, "create JobMedia for Job %s\n", mjcr->Job);
- if (dev->state & ST_TAPE) {
- mjcr->EndBlock = dev->EndBlock;
- mjcr->EndFile = dev->EndFile;
- Dmsg2(200, "Fixup EndFile=%u EndBlock=%u\n", mjcr->EndFile, mjcr->EndBlock);
- } else {
- mjcr->EndBlock = (uint32_t)dev->file_addr;
- mjcr->EndFile = (uint32_t)(dev->file_addr >> 32);
- }
- if (!dir_create_jobmedia_record(mjcr)) {
- Jmsg(mjcr, M_ERROR, 0, _("Could not create JobMedia record for Volume=%s Job=%s\n"),
- dev->VolCatInfo.VolCatName, mjcr->Job);
- P(dev->mutex);
- unblock_device(dev);
- return 0;
- }
- }
- strcpy(dev->VolCatInfo.VolCatStatus, "Full");
- Dmsg2(200, "Call update_vol_info Stat=%s Vol=%s\n",
- dev->VolCatInfo.VolCatStatus, dev->VolCatInfo.VolCatName);
- if (!dir_update_volume_info(jcr, &dev->VolCatInfo, 0)) { /* send Volume info to Director */
- P(dev->mutex);
- unblock_device(dev);
- return 0; /* device locked */
- }
- Dmsg0(100, "Back from update_vol_info\n");
+ Dmsg0(100, "=== Enter fixup_device_block_write_error\n");
- strcpy(PrevVolName, dev->VolCatInfo.VolCatName);
- strcpy(dev->VolHdr.PrevVolName, PrevVolName);
+ /*
+ * If we are blocked at entry, unblock it, and set our own block status
+ */
+ if (blocked != BST_NOT_BLOCKED) {
+ unblock_device(dev);
+ }
+ block_device(dev, BST_DOING_ACQUIRE);
- label_blk = new_block(dev);
+ /* Continue unlocked, but leave BLOCKED */
+ dev->Unlock();
- /* Inform User about end of media */
- Jmsg(jcr, M_INFO, 0, _("End of media on Volume %s Bytes=%s Blocks=%s.\n"),
- PrevVolName, edit_uint64_with_commas(dev->VolCatInfo.VolCatBytes, b1),
- edit_uint64_with_commas(dev->VolCatInfo.VolCatBlocks, b2));
+ bstrncpy(PrevVolName, dev->getVolCatName(), sizeof(PrevVolName));
+ bstrncpy(dev->VolHdr.PrevVolumeName, PrevVolName, sizeof(dev->VolHdr.PrevVolumeName));
- if (!mount_next_write_volume(jcr, dev, label_blk, 1)) {
- P(dev->mutex);
- unblock_device(dev);
- return 0; /* device locked */
- }
- P(dev->mutex); /* lock again */
-
- Jmsg(jcr, M_INFO, 0, _("New volume %s mounted on device %s\n"),
- jcr->VolumeName, dev_name(dev));
-
- /*
- * If this is a new tape, the label_blk will contain the
- * label, so write it now. If this is a previously
- * used tape, mount_next_write_volume() will return an
- * empty label_blk, and nothing will be written.
- */
- Dmsg0(190, "write label block to dev\n");
- if (!write_block_to_dev(jcr, dev, label_blk)) {
- Pmsg1(0, "write_block_to_device Volume label failed. ERR=%s",
- strerror_dev(dev));
- free_block(label_blk);
- unblock_device(dev);
- return 0; /* device locked */
- }
+ label_blk = new_block(dev);
+ dcr->block = label_blk;
- /* Write overflow block to tape */
- Dmsg0(190, "Write overflow block to dev\n");
- if (!write_block_to_dev(jcr, dev, block)) {
- Pmsg1(0, "write_block_to_device overflow block failed. ERR=%s",
- strerror_dev(dev));
- free_block(label_blk);
- unblock_device(dev);
- return 0; /* device locked */
- }
+ /* Inform User about end of medium */
+ Jmsg(jcr, M_INFO, 0, _("End of medium on Volume \"%s\" Bytes=%s Blocks=%s at %s.\n"),
+ PrevVolName, edit_uint64_with_commas(dev->VolCatInfo.VolCatBytes, b1),
+ edit_uint64_with_commas(dev->VolCatInfo.VolCatBlocks, b2),
+ bstrftime(dt, sizeof(dt), time(NULL)));
- jcr->NumVolumes++;
- Dmsg0(190, "Wake up any waiting threads.\n");
+ Dmsg1(050, "set_unload dev=%s\n", dev->print_name());
+ dev->set_unload();
+ if (!dcr->mount_next_write_volume()) {
free_block(label_blk);
- for (JCR *mjcr=NULL; (mjcr=next_attached_jcr(dev, mjcr)); ) {
- /* Set new start/end positions */
- if (dev->state & ST_TAPE) {
- mjcr->StartBlock = dev->block_num;
- mjcr->StartFile = dev->file;
- } else {
- mjcr->StartBlock = (uint32_t)dev->file_addr;
- mjcr->StartFile = (uint32_t)(dev->file_addr >> 32);
- }
- mjcr->VolFirstFile = mjcr->JobFiles;
- mjcr->run_time += time(NULL) - wait_time; /* correct run time */
- }
- unblock_device(dev);
- return 1; /* device locked */
+ dcr->block = block;
+ dev->Lock();
+ goto bail_out;
}
- if (label_blk) {
+ Dmsg2(050, "must_unload=%d dev=%s\n", dev->must_unload(), dev->print_name());
+ dev->Lock(); /* lock again */
+
+ dev->VolCatInfo.VolCatJobs++; /* increment number of jobs on vol */
+ dir_update_volume_info(dcr, false, false); /* send Volume info to Director */
+
+ Jmsg(jcr, M_INFO, 0, _("New volume \"%s\" mounted on device %s at %s.\n"),
+ dcr->VolumeName, dev->print_name(), bstrftime(dt, sizeof(dt), time(NULL)));
+
+ /*
+ * If this is a new tape, the label_blk will contain the
+ * label, so write it now. If this is a previously
+ * used tape, mount_next_write_volume() will return an
+ * empty label_blk, and nothing will be written.
+ */
+ Dmsg0(190, "write label block to dev\n");
+ if (!dcr->write_block_to_dev()) {
+ berrno be;
+ Pmsg1(0, _("write_block_to_device Volume label failed. ERR=%s"),
+ be.bstrerror(dev->dev_errno));
free_block(label_blk);
+ dcr->block = block;
+ goto bail_out;
}
- return 0; /* device locked */
-}
-
-
-/*
- * Open the device. Expect dev to already be initialized.
- *
- * This routine is used only when the Storage daemon starts
- * and always_open is set, and in the stand-alone utility
- * routines such as bextract.
- *
- * Note, opening of a normal file is deferred to later so
- * that we can get the filename; the device_name for
- * a file is the directory only.
- *
- * Retuns: 0 on failure
- * 1 on success
- */
-int open_device(DEVICE *dev)
-{
- Dmsg0(120, "start open_output_device()\n");
- if (!dev) {
- return 0;
- }
-
- lock_device(dev);
-
- /* Defer opening files */
- if (!dev_is_tape(dev)) {
- Dmsg0(129, "Device is file, deferring open.\n");
- unlock_device(dev);
- return 1;
- }
-
- if (!(dev->state & ST_OPENED)) {
- Dmsg0(129, "Opening device.\n");
- if (open_dev(dev, NULL, READ_WRITE) < 0) {
- Emsg1(M_FATAL, 0, _("dev open failed: %s\n"), dev->errmsg);
- unlock_device(dev);
- return 0;
+ free_block(label_blk);
+ dcr->block = block;
+
+ /*
+ * Walk through all attached jcrs indicating the volume has changed
+ */
+ Dmsg1(100, "Notify vol change. Volume=%s\n", dev->getVolCatName());
+ DCR *mdcr;
+ foreach_dlist(mdcr, dev->attached_dcrs) {
+ JCR *mjcr = mdcr->jcr;
+ if (mjcr->JobId == 0) {
+ continue; /* ignore console */
+ }
+ mdcr->NewVol = true;
+ if (jcr != mjcr) {
+ bstrncpy(mdcr->VolumeName, dcr->VolumeName, sizeof(mdcr->VolumeName));
}
}
- Dmsg1(129, "open_dev %s OK\n", dev_name(dev));
-
- unlock_device(dev);
- return 1;
-}
-/*
- * When dev_blocked is set, all threads EXCEPT thread with id no_wait_id
- * must wait. The no_wait_id thread is out obtaining a new volume
- * and preparing the label.
- */
-void _lock_device(char *file, int line, DEVICE *dev)
-{
- int stat;
- Dmsg3(100, "lock %d from %s:%d\n", dev->dev_blocked, file, line);
- P(dev->mutex);
- if (dev->dev_blocked && !pthread_equal(dev->no_wait_id, pthread_self())) {
- dev->num_waiting++; /* indicate that I am waiting */
- while (dev->dev_blocked) {
- if ((stat = pthread_cond_wait(&dev->wait, &dev->mutex)) != 0) {
- V(dev->mutex);
- Emsg1(M_ABORT, 0, _("pthread_cond_wait failure. ERR=%s\n"),
- strerror(stat));
- }
+ /* Clear NewVol now because dir_get_volume_info() already done */
+ jcr->dcr->NewVol = false;
+ set_new_volume_parameters(dcr);
+
+ jcr->run_time += time(NULL) - wait_time; /* correct run time for mount wait */
+
+ /* Write overflow block to device */
+ Dmsg0(190, "Write overflow block to dev\n");
+ if (!dcr->write_block_to_dev()) {
+ berrno be;
+ Dmsg1(0, _("write_block_to_device overflow block failed. ERR=%s"),
+ be.bstrerror(dev->dev_errno));
+ /* Note: recursive call */
+ if (retries-- <= 0 || !fixup_device_block_write_error(dcr, retries)) {
+ Jmsg2(jcr, M_FATAL, 0,
+ _("Catastrophic error. Cannot write overflow block to device %s. ERR=%s"),
+ dev->print_name(), be.bstrerror(dev->dev_errno));
+ goto bail_out;
}
- dev->num_waiting--; /* no longer waiting */
}
+ ok = true;
+
+bail_out:
+ /*
+ * At this point, the device is locked and blocked.
+ * Unblock the device, restore any entry blocked condition, then
+ * return leaving the device locked (as it was on entry).
+ */
+ unblock_device(dev);
+ if (blocked != BST_NOT_BLOCKED) {
+ block_device(dev, blocked);
+ }
+ return ok; /* device locked */
}
-void _unlock_device(char *file, int line, DEVICE *dev)
-{
- Dmsg2(100, "unlock from %s:%d\n", file, line);
- V(dev->mutex);
-}
-
-/*
- * Block all other threads from using the device
- * Device must already be locked. After this call,
- * the device is blocked to any thread calling lock_device(),
- * but the device is not locked (i.e. no P on device). Also,
- * the current thread can do slip through the lock_device()
- * calls without blocking.
- */
-void _block_device(char *file, int line, DEVICE *dev, int state)
+void set_start_vol_position(DCR *dcr)
{
- Dmsg3(100, "block set %d from %s:%d\n", state, file, line);
- ASSERT(dev->dev_blocked == BST_NOT_BLOCKED);
- dev->dev_blocked = state; /* make other threads wait */
- dev->no_wait_id = pthread_self(); /* allow us to continue */
+ DEVICE *dev = dcr->dev;
+ /* Set new start position */
+ if (dev->is_tape()) {
+ dcr->StartBlock = dev->block_num;
+ dcr->StartFile = dev->file;
+ } else {
+ dcr->StartBlock = (uint32_t)dev->file_addr;
+ dcr->StartFile = (uint32_t)(dev->file_addr >> 32);
+ }
}
-
-
/*
- * Unblock the device, and wake up anyone who went to sleep.
+ * We have a new Volume mounted, so reset the Volume parameters
+ * concerning this job. The global changes were made earlier
+ * in the dev structure.
*/
-void _unblock_device(char *file, int line, DEVICE *dev)
+void set_new_volume_parameters(DCR *dcr)
{
- Dmsg3(100, "unblock %d from %s:%d\n", dev->dev_blocked, file, line);
- ASSERT(dev->dev_blocked);
- dev->dev_blocked = BST_NOT_BLOCKED;
- if (dev->num_waiting > 0) {
- pthread_cond_broadcast(&dev->wait); /* wake them up */
+ JCR *jcr = dcr->jcr;
+ if (dcr->NewVol && !dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
+ Jmsg1(jcr, M_ERROR, 0, "%s", jcr->errmsg);
}
+ set_new_file_parameters(dcr);
+ jcr->NumWriteVolumes++;
+ dcr->NewVol = false;
}
-void _steal_device_lock(char *file, int line, DEVICE *dev, bsteal_lock_t *hold, int state)
+/*
+ * We are now in a new Volume file, so reset the Volume parameters
+ * concerning this job. The global changes were made earlier
+ * in the dev structure.
+ */
+void set_new_file_parameters(DCR *dcr)
{
- Dmsg4(100, "steal lock. old=%d new=%d from %s:%d\n", dev->dev_blocked, state,
- file, line);
- hold->dev_blocked = dev->dev_blocked;
- hold->no_wait_id = dev->no_wait_id;
- dev->dev_blocked = state;
- dev->no_wait_id = pthread_self();
- V(dev->mutex);
-}
+ set_start_vol_position(dcr);
-void _return_device_lock(char *file, int line, DEVICE *dev, bsteal_lock_t *hold)
-{
- Dmsg4(100, "return lock. old=%d new=%d from %s:%d\n",
- dev->dev_blocked, hold->dev_blocked, file, line);
- P(dev->mutex);
- dev->dev_blocked = hold->dev_blocked;
- dev->no_wait_id = hold->no_wait_id;
+ /* Reset indicies */
+ dcr->VolFirstIndex = 0;
+ dcr->VolLastIndex = 0;
+ dcr->NewFile = false;
+ dcr->WroteVol = false;
}
-/* ==================================================================
- * New device locking code. It is not currently used.
- * ==================================================================
- */
-
/*
- * New device locking scheme
+ * First Open of the device. Expect dev to already be initialized.
+ *
+ * This routine is used only when the Storage daemon starts
+ * and always_open is set, and in the stand-alone utility
+ * routines such as bextract.
+ *
+ * Note, opening of a normal file is deferred to later so
+ * that we can get the filename; the device_name for
+ * a file is the directory only.
+ *
+ * Returns: false on failure
+ * true on success
*/
-void _new_lock_device(char *file, int line, DEVICE *dev)
+bool first_open_device(DCR *dcr)
{
-#ifdef NEW_LOCK
- int errstat;
- if ((errstat=rwl_writelock(&dev->lock)) != 0) {
- e_msg(file, line, M_ABORT, 0, "rwl_writelock failure. ERR=%s\n",
- strerror(errstat));
- }
-#endif
-}
+ DEVICE *dev = dcr->dev;
+ bool ok = true;
-void _new_lock_device(char *file, int line, DEVICE *dev, int state)
-{
-#ifdef NEW_LOCK
- int errstat;
- if ((errstat=rwl_writelock(&dev->lock)) != 0) {
- e_msg(file, line, M_ABORT, 0, "rwl_writelock failure. ERR=%s\n",
- strerror(errstat));
+ Dmsg0(120, "start open_output_device()\n");
+ if (!dev) {
+ return false;
}
- dev->dev_blocked = state;
-#endif
-}
-void _new_unlock_device(char *file, int line, DEVICE *dev)
-{
-#ifdef NEW_LOCK
- int errstat;
- if (dev->lock.w_active == 1) {
- dev->dev_blocked = BST_NOT_BLOCKED;
+ dev->rLock();
+
+ /* Defer opening files */
+ if (!dev->is_tape()) {
+ Dmsg0(129, "Device is file, deferring open.\n");
+ goto bail_out;
}
- if ((errstat=rwl_writeunlock(&dev->lock)) != 0) {
- e_msg(file, line, M_ABORT, 0, "rwl_writeunlock failure. ERR=%s\n",
- strerror(errstat));
+
+ int mode;
+ if (dev->has_cap(CAP_STREAM)) {
+ mode = OPEN_WRITE_ONLY;
+ } else {
+ mode = OPEN_READ_ONLY;
+ }
+ Dmsg0(129, "Opening device.\n");
+ if (!dev->open(dcr, mode)) {
+ Emsg1(M_FATAL, 0, _("dev open failed: %s\n"), dev->errmsg);
+ ok = false;
+ goto bail_out;
}
-#endif
-}
+ Dmsg1(129, "open dev %s OK\n", dev->print_name());
-void new_steal_device_lock(DEVICE *dev, brwsteal_t *hold, int state)
-{
-#ifdef NEW_LOCK
- hold->state = dev->dev_blocked;
- hold->writer_id = dev->lock.writer_id;
- dev->dev_blocked = state;
- dev->lock.writer_id = pthread_self();
- V(dev->lock.mutex);
-#endif
+bail_out:
+ dev->Unlock();
+ return ok;
}
-void new_return_device_lock(DEVICE *dev, brwsteal_t *hold)
+/*
+ * Make sure device is open, if not do so
+ */
+bool open_device(DCR *dcr)
{
-#ifdef NEW_LOCK
- P(dev->lock.mutex);
- dev->dev_blocked = hold->state;
- dev->lock.writer_id = hold->writer_id;
-#endif
+ DEVICE *dev = dcr->dev;
+ /* Open device */
+ int mode;
+ if (dev->has_cap(CAP_STREAM)) {
+ mode = OPEN_WRITE_ONLY;
+ } else {
+ mode = OPEN_READ_WRITE;
+ }
+ if (!dev->open(dcr, mode)) {
+ /* If polling, ignore the error */
+ /* If DVD, also ignore the error, very often you cannot open the device
+ * (when there is no DVD, or when the one inserted is a wrong one) */
+ if (!dev->poll && !dev->is_dvd() && !dev->is_removable()) {
+ Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device %s: ERR=%s\n"),
+ dev->print_name(), dev->bstrerror());
+ Pmsg2(000, _("Unable to open archive %s: ERR=%s\n"),
+ dev->print_name(), dev->bstrerror());
+ }
+ return false;
+ }
+ return true;
}
projects / bacula / bacula / blobdiff