3 * Routines for handling mounting tapes for reading and for
6 * Kern Sibbald, August MMII
11 Copyright (C) 2000-2004 Kern Sibbald and John Walker
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License as
15 published by the Free Software Foundation; either version 2 of
16 the License, or (at your option) any later version.
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public
24 License along with this program; if not, write to the Free
25 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 #include "bacula.h" /* pull in global headers */
31 #include "stored.h" /* pull in Storage Deamon headers */
33 static bool rewrite_volume_label(DCR *dcr, DEV_BLOCK *block, bool recycle);
37 * If release is set, we rewind the current volume,
38 * which we no longer want, and ask the user (console)
39 * to mount the next volume.
41 * Continue trying until we get it, and then ensure
42 * that we can write on it.
44 * This routine returns a 0 only if it is REALLY
45 * impossible to get the requested Volume.
48 bool mount_next_write_volume(DCR *dcr, DEV_BLOCK *block, bool release)
51 bool ask = false, recycle, autochanger;
53 DEVICE *dev = dcr->dev;
56 Dmsg0(100, "Enter mount_next_volume()\n");
58 init_dev_wait_timers(dev);
61 * Attempt to mount the next volume. If something non-fatal goes
62 * wrong, we come back here to re-try (new op messages, re-read
66 /* Ignore retry if this is poll request */
67 if (!dev->poll && retry++ > 4) {
68 /* Last ditch effort before giving up, force operator to respond */
69 jcr->VolCatInfo.Slot = 0;
70 if (!dir_ask_sysop_to_mount_volume(dcr)) {
71 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
76 if (job_canceled(jcr)) {
77 Jmsg(jcr, M_FATAL, 0, _("Job %d canceled.\n"), jcr->JobId);
82 Dmsg0(100, "mount_next_volume release=1\n");
83 release_volume(jcr, dev);
84 ask = true; /* ask operator to mount tape */
88 * Get Director's idea of what tape we should have mounted.
91 Dmsg0(200, "Before dir_find_next_appendable_volume.\n");
92 while (!dir_find_next_appendable_volume(dcr)) {
93 Dmsg0(200, "not dir_find_next\n");
94 if (!dir_ask_sysop_to_create_appendable_volume(dcr)) {
97 Dmsg0(200, "Again dir_find_next_append...\n");
99 if (job_canceled(jcr)) {
102 Dmsg2(100, "After find_next_append. Vol=%s Slot=%d\n",
103 jcr->VolCatInfo.VolCatName, jcr->VolCatInfo.Slot);
106 * Get next volume and ready it for append
107 * This code ensures that the device is ready for
108 * writing. We start from the assumption that there
109 * may not be a tape mounted.
111 * If the device is a file, we create the output
112 * file. If it is a tape, we check the volume name
113 * and move the tape to the end of data.
115 * It assumes that the device is not already in use!
118 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
120 if (autoload_device(dcr, 1, NULL) > 0) {
125 jcr->VolCatInfo.Slot = 0;
127 Dmsg1(100, "autoload_dev returns %d\n", autochanger);
129 * If we autochanged to correct Volume or (we have not just
130 * released the Volume AND we can automount) we go ahead
131 * and read the label. If there is no tape in the drive,
132 * we will err, recurse and ask the operator the next time.
134 if (!release && dev_is_tape(dev) && dev_cap(dev, CAP_AUTOMOUNT)) {
135 ask = false; /* don't ask SYSOP this time */
137 /* Don't ask if not removable */
138 if (!dev_cap(dev, CAP_REM)) {
141 Dmsg2(100, "Ask=%d autochanger=%d\n", ask, autochanger);
142 release = true; /* release next time if we "recurse" */
144 if (ask && !dir_ask_sysop_to_mount_volume(dcr)) {
145 Dmsg0(100, "Error return ask_sysop ...\n");
146 return false; /* error return */
148 if (job_canceled(jcr)) {
151 Dmsg1(100, "want vol=%s\n", jcr->VolumeName);
153 if (dev->poll && dev_cap(dev, CAP_CLOSEONPOLL)) {
154 force_close_dev(dev);
157 /* Ensure the device is open */
158 if (!open_device(jcr, dev)) {
163 * Now make sure we have the right tape mounted
167 * If we are writing to a stream device, ASSUME the volume label
170 if (dev_cap(dev, CAP_STREAM)) {
171 vol_label_status = VOL_OK;
172 create_volume_label(dev, jcr->VolumeName, "Default");
173 dev->VolHdr.LabelType = PRE_LABEL;
175 vol_label_status = read_dev_volume_label(jcr->dcr, block);
178 Dmsg2(100, "dirVol=%s dirStat=%s\n", jcr->VolumeName,
179 jcr->VolCatInfo.VolCatStatus);
181 * At this point, dev->VolCatInfo has what is in the drive, if anything,
182 * and jcr->VolCatInfo has what the Director wants.
184 switch (vol_label_status) {
186 Dmsg1(100, "Vol OK name=%s\n", jcr->VolumeName);
187 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(jcr->VolCatInfo));
188 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
189 break; /* got a Volume */
191 VOLUME_CAT_INFO VolCatInfo;
193 /* If not removable, Volume is broken */
194 if (!dev_cap(dev, CAP_REM)) {
195 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
196 jcr->VolumeName, dev_name(dev));
197 mark_volume_in_error(jcr, dev);
201 Dmsg1(100, "Vol NAME Error Name=%s\n", jcr->VolumeName);
202 /* If polling and got a previous bad name, ignore it */
203 if (dev->poll && strcmp(dev->BadVolName, dev->VolHdr.VolName) == 0) {
205 Dmsg1(200, "Vol Name error supress due to poll. Name=%s\n",
210 * OK, we got a different volume mounted. First save the
211 * requested Volume info (jcr) structure, then query if
212 * this volume is really OK. If not, put back the desired
213 * volume name and continue.
215 memcpy(&VolCatInfo, &jcr->VolCatInfo, sizeof(VolCatInfo));
216 /* Check if this is a valid Volume in the pool */
217 pm_strcpy(&jcr->VolumeName, dev->VolHdr.VolName);
218 if (!dir_get_volume_info(dcr, GET_VOL_INFO_FOR_WRITE)) {
219 bstrncpy(dev->BadVolName, dev->VolHdr.VolName, sizeof(dev->BadVolName));
220 Jmsg(jcr, M_WARNING, 0, _("Director wanted Volume \"%s\".\n"
221 " Current Volume \"%s\" not acceptable because:\n"
223 VolCatInfo.VolCatName, dev->VolHdr.VolName,
224 jcr->dir_bsock->msg);
225 /* Restore desired volume name, note device info out of sync */
226 memcpy(&jcr->VolCatInfo, &VolCatInfo, sizeof(jcr->VolCatInfo));
230 Dmsg1(100, "want new name=%s\n", jcr->VolumeName);
231 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(dev->VolCatInfo));
232 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
233 break; /* got a Volume */
235 * At this point, we assume we have a blank tape mounted.
240 * If permitted, we label the device, make sure we can do
241 * it by checking that the VolCatBytes is zero => not labeled,
242 * once the Volume is labeled we don't want to label another
243 * blank tape with the same name. For disk, we go ahead and
244 * label it anyway, because the OS insures that there is only
245 * one Volume with that name.
246 * As noted above, at this point jcr->VolCatInfo has what
247 * the Director wants and dev->VolCatInfo has info on the
248 * previous tape (or nothing).
250 if (dev_cap(dev, CAP_LABEL) && (jcr->VolCatInfo.VolCatBytes == 0 ||
251 (!dev_is_tape(dev) && strcmp(jcr->VolCatInfo.VolCatStatus,
253 Dmsg0(100, "Create volume label\n");
254 /* Create a new Volume label and write it to the device */
255 if (!write_new_volume_label_to_dev(jcr->dcr, jcr->VolumeName,
257 Dmsg0(100, "!write_vol_label\n");
260 Dmsg0(100, "dir_update_vol_info. Set Append\n");
261 /* Copy Director's info into the device info */
262 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(dev->VolCatInfo));
263 dir_update_volume_info(dcr, true); /* indicate tape labeled */
264 Jmsg(jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
265 jcr->VolumeName, dev_name(dev));
266 goto read_volume; /* read label we just wrote */
268 /* If not removable, Volume is broken */
269 if (!dev_cap(dev, CAP_REM)) {
270 Jmsg(jcr, M_WARNING, 0, _("Volume \"%s\" not on device %s.\n"),
271 jcr->VolumeName, dev_name(dev));
272 mark_volume_in_error(jcr, dev);
275 /* NOTE! Fall-through wanted. */
278 /* Send error message */
280 Jmsg(jcr, M_WARNING, 0, "%s", jcr->errmsg);
282 Dmsg1(200, "Msg suppressed by poll: %s\n", jcr->errmsg);
289 * See if we have a fresh tape or a tape with data.
291 * Note, if the LabelType is PRE_LABEL, it was labeled
292 * but never written. If so, rewrite the label but set as
293 * VOL_LABEL. We rewind and return the label (reconstructed)
294 * in the block so that in the case of a new tape, data can
295 * be appended just after the block label. If we are writing
296 * a second volume, the calling routine will write the label
297 * before writing the overflow block.
299 * If the tape is marked as Recycle, we rewrite the label.
301 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
302 if (!rewrite_volume_label(jcr->dcr, block, recycle)) {
307 * OK, at this point, we have a valid Bacula label, but
308 * we need to position to the end of the volume, since we are
309 * just now putting it into append mode.
311 Dmsg0(200, "Device previously written, moving to end of data\n");
312 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
315 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data on device \"%s\". ERR=%s\n"),
316 dev_name(dev), strerror_dev(dev));
317 mark_volume_in_error(jcr, dev);
320 /* *****FIXME**** we should do some checking for files too */
321 if (dev_is_tape(dev)) {
323 * Check if we are positioned on the tape at the same place
324 * that the database says we should be.
326 if (dev->VolCatInfo.VolCatFiles == dev_file(dev)) {
327 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume \"%s\" at file=%d.\n"),
328 jcr->VolumeName, dev_file(dev));
330 Jmsg(jcr, M_ERROR, 0, _("I canot write on Volume \"%s\" because:\n\
331 The number of files mismatch! Volume=%u Catalog=%u\n"),
332 jcr->VolumeName, dev_file(dev), dev->VolCatInfo.VolCatFiles);
333 mark_volume_in_error(jcr, dev);
337 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
338 Dmsg1(100, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
339 dir_update_volume_info(dcr, false);
340 /* Return an empty block */
341 empty_block(block); /* we used it for reading so set for write */
343 dev->state |= ST_APPEND;
344 Dmsg0(100, "Normal return from read_dev_for_append\n");
349 * Write a volume label.
350 * Returns: true if OK
351 * false if unable to write it
353 static bool rewrite_volume_label(DCR *dcr, DEV_BLOCK *block, bool recycle)
355 DEVICE *dev = dcr->dev;
358 Dmsg1(190, "ready_for_append found freshly labeled volume. dev=%x\n", dev);
359 dev->VolHdr.LabelType = VOL_LABEL; /* set Volume label */
360 if (!write_volume_label_to_block(dcr, block)) {
364 * If we are not dealing with a streaming device,
365 * write the block now to ensure we have write permission.
366 * It is better to find out now rather than later.
368 if (!dev_cap(dev, CAP_STREAM)) {
369 if (!rewind_dev(dev)) {
370 Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device \"%s\". ERR=%s\n"),
371 dev_name(dev), strerror_dev(dev));
374 if (!truncate_dev(dev)) {
375 Jmsg2(jcr, M_WARNING, 0, _("Truncate error on device \"%s\". ERR=%s\n"),
376 dev_name(dev), strerror_dev(dev));
379 /* Attempt write to check write permission */
380 if (!write_block_to_dev(dcr, block)) {
381 Jmsg2(jcr, M_ERROR, 0, _("Unable to write device \"%s\". ERR=%s\n"),
382 dev_name(dev), strerror_dev(dev));
386 /* Set or reset Volume statistics */
387 dev->VolCatInfo.VolCatJobs = 0;
388 dev->VolCatInfo.VolCatFiles = 0;
389 dev->VolCatInfo.VolCatBytes = 1;
390 dev->VolCatInfo.VolCatErrors = 0;
391 dev->VolCatInfo.VolCatBlocks = 0;
392 dev->VolCatInfo.VolCatRBytes = 0;
394 dev->VolCatInfo.VolCatMounts++;
395 dev->VolCatInfo.VolCatRecycles++;
397 dev->VolCatInfo.VolCatMounts = 1;
398 dev->VolCatInfo.VolCatRecycles = 0;
399 dev->VolCatInfo.VolCatWrites = 1;
400 dev->VolCatInfo.VolCatReads = 1;
402 Dmsg0(100, "dir_update_vol_info. Set Append\n");
403 bstrncpy(dev->VolCatInfo.VolCatStatus, "Append", sizeof(dev->VolCatInfo.VolCatStatus));
404 dir_update_volume_info(dcr, true); /* indicate doing relabel */
406 Jmsg(jcr, M_INFO, 0, _("Recycled volume \"%s\" on device \"%s\", all previous data lost.\n"),
407 jcr->VolumeName, dev_name(dev));
409 Jmsg(jcr, M_INFO, 0, _("Wrote label to prelabeled Volume \"%s\" on device \"%s\"\n"),
410 jcr->VolumeName, dev_name(dev));
413 * End writing real Volume label (from pre-labeled tape), or recycling
421 * Mark volume in error in catalog
423 void mark_volume_in_error(JCR *jcr, DEVICE *dev)
425 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
427 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
428 Dmsg0(100, "dir_update_vol_info. Set Error.\n");
429 dir_update_volume_info(jcr->dcr, false);
433 * If we are reading, we come here at the end of the tape
434 * and see if there are more volumes to be mounted.
436 bool mount_next_read_volume(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
438 Dmsg2(90, "NumVolumes=%d CurVolume=%d\n", jcr->NumVolumes, jcr->CurVolume);
440 * End Of Tape -- mount next Volume (if another specified)
442 if (jcr->NumVolumes > 1 && jcr->CurVolume < jcr->NumVolumes) {
444 dev->state &= ~ST_READ;
445 if (!acquire_device_for_read(jcr)) {
446 Jmsg2(jcr, M_FATAL, 0, "Cannot open Dev=%s, Vol=%s\n", dev_name(dev),
450 return true; /* next volume mounted */
452 Dmsg0(90, "End of Device reached.\n");
457 * Either because we are going to hang a new volume, or because
458 * of explicit user request, we release the current volume.
460 void release_volume(JCR *jcr, DEVICE *dev)
462 if (jcr->dcr->WroteVol) {
463 Jmsg0(jcr, M_ERROR, 0, "Hey!!!!! WroteVol non-zero !!!!!\n");
466 * First erase all memory of the current volume
468 dev->block_num = dev->file = 0;
469 dev->EndBlock = dev->EndFile = 0;
470 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
471 memset(&jcr->VolCatInfo, 0, sizeof(jcr->VolCatInfo));
472 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
473 /* Force re-read of label */
474 dev->state &= ~(ST_LABEL|ST_READ|ST_APPEND);
475 jcr->VolumeName[0] = 0;
477 if ((dev->state & ST_OPENED) &&
478 (!dev_is_tape(dev) || !dev_cap(dev, CAP_ALWAYSOPEN))) {
479 offline_or_rewind_dev(dev);
483 /* If we have not closed the device, then at least rewind the tape */
484 if (dev->state & ST_OPENED) {
485 offline_or_rewind_dev(dev);