3 * Routines for handling mounting tapes for reading and for
6 * Kern Sibbald, August MMII
11 Copyright (C) 2000-2003 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 /* Forward referenced functions */
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 int mount_next_write_volume(JCR *jcr, DEVICE *dev, DEV_BLOCK *block, int release)
50 int retry = 0, autochanger;
53 Dmsg0(100, "Enter mount_next_volume()\n");
57 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
61 if (job_canceled(jcr)) {
62 Jmsg(jcr, M_FATAL, 0, _("Job %d canceled.\n"), jcr->JobId);
66 recycle = ask = false;
68 Dmsg0(100, "mount_next_volume release=1\n");
69 release_volume(jcr, dev);
70 ask = true; /* ask operator to mount tape */
74 * Get Director's idea of what tape we should have mounted.
77 Dmsg0(100, "Before dir_find_next\n");
78 if (!dir_find_next_appendable_volume(jcr)) {
79 Dmsg0(100, "not dir_find_next\n");
80 if (!dir_ask_sysop_to_mount_next_volume(jcr, dev)) {
84 Dmsg2(100, "After find_next_append. Vol=%s Slot=%d\n",
85 jcr->VolCatInfo.VolCatName, jcr->VolCatInfo.Slot);
88 * Get next volume and ready it for append
89 * This code ensures that the device is ready for
90 * writing. We start from the assumption that there
91 * may not be a tape mounted.
93 * If the device is a file, we create the output
94 * file. If it is a tape, we check the volume name
95 * and move the tape to the end of data.
97 * It assumes that the device is not already in use!
102 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
105 int vol_label_status;
106 autochanger = autoload_device(jcr, dev, 1, NULL);
107 Dmsg1(100, "autoload_dev returns %d\n", autochanger);
110 * If we autochanged to correct Volume or (we have not just
111 * released the Volume AND we can automount) we go ahead
112 * and read the label. If there is no tape in the drive,
113 * we will err, recurse and ask the operator the next time.
115 if (autochanger || (!release && dev_is_tape(dev) && dev_cap(dev, CAP_AUTOMOUNT))) {
116 ask = false; /* don't ask SYSOP this time */
118 Dmsg2(100, "Ask=%d autochanger=%d\n", ask, autochanger);
119 release = 1; /* release next time if we "recurse" */
121 if (ask && !dir_ask_sysop_to_mount_next_volume(jcr, dev)) {
122 Dmsg0(100, "Error return ask_sysop ...\n");
123 return 0; /* error return */
125 Dmsg1(100, "want vol=%s\n", jcr->VolumeName);
128 if (!(dev_state(dev, ST_OPENED))) {
130 if (dev_cap(dev, CAP_STREAM)) {
131 mode = OPEN_WRITE_ONLY;
133 mode = OPEN_READ_WRITE;
135 if (open_dev(dev, jcr->VolCatInfo.VolCatName, mode) < 0) {
136 Jmsg2(jcr, M_FATAL, 0, _("Unable to open device %s. ERR=%s\n"),
137 dev_name(dev), strerror_dev(dev));
143 * Now make sure we have the right tape mounted
147 * If we are writing to a stream device, ASSUME the volume label
150 if (dev_cap(dev, CAP_STREAM)) {
151 vol_label_status = VOL_OK;
152 create_volume_label(dev, jcr->VolumeName, "Default");
153 dev->VolHdr.LabelType = PRE_LABEL;
155 vol_label_status = read_dev_volume_label(jcr, dev, block);
158 Dmsg2(100, "dirVol=%s dirStat=%s\n", jcr->VolumeName,
159 jcr->VolCatInfo.VolCatStatus);
161 * At this point, dev->VolCatInfo has what is in the drive, if anything,
162 * and jcr->VolCatInfo has what the Director wants.
164 switch (vol_label_status) {
166 Dmsg1(100, "Vol OK name=%s\n", jcr->VolumeName);
167 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(jcr->VolCatInfo));
168 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
169 break; /* got a Volume */
171 VOLUME_CAT_INFO VolCatInfo;
173 Dmsg1(100, "Vol NAME Error Name=%s\n", jcr->VolumeName);
175 * OK, we got a different volume mounted. First save the
176 * requested Volume info (jcr) structure, then query if
177 * this volume is really OK. If not, put back the desired
178 * volume name and continue.
180 memcpy(&VolCatInfo, &jcr->VolCatInfo, sizeof(VolCatInfo));
181 /* Check if this is a valid Volume in the pool */
182 pm_strcpy(&jcr->VolumeName, dev->VolHdr.VolName);
183 if (!dir_get_volume_info(jcr, GET_VOL_INFO_FOR_WRITE)) {
184 Mmsg(&jcr->errmsg, _("Director wanted Volume \"%s\".\n"
185 " Current Volume \"%s\" not acceptable because:\n"
187 VolCatInfo.VolCatName, dev->VolHdr.VolName,
188 jcr->dir_bsock->msg);
189 /* Restore desired volume name, note device info out of sync */
190 memcpy(&jcr->VolCatInfo, &VolCatInfo, sizeof(jcr->VolCatInfo));
193 Dmsg1(100, "want new name=%s\n", jcr->VolumeName);
194 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(dev->VolCatInfo));
195 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
196 break; /* got a Volume */
198 * At this point, we assume we have a blank tape mounted.
203 * If permitted, we label the device, make sure we can do
204 * it by checking that the VolCatBytes is zero => not labeled,
205 * once the Volume is labeled we don't want to label another
206 * blank tape with the same name. For disk, we go ahead and
207 * label it anyway, because the OS insures that there is only
208 * one Volume with that name.
209 * As noted above, at this point jcr->VolCatInfo has what
210 * the Director wants and dev->VolCatInfo has info on the
211 * previous tape (or nothing).
213 if (dev_cap(dev, CAP_LABEL) && (jcr->VolCatInfo.VolCatBytes == 0 ||
214 (!dev_is_tape(dev) && strcmp(jcr->VolCatInfo.VolCatStatus,
216 Dmsg0(100, "Create volume label\n");
217 if (!write_volume_label_to_dev(jcr, (DEVRES *)dev->device, jcr->VolumeName,
219 Dmsg0(100, "!write_vol_label\n");
222 Dmsg0(100, "dir_update_vol_info. Set Append\n");
223 /* Copy Director's info into the device info */
224 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(dev->VolCatInfo));
225 dir_update_volume_info(jcr, dev, 1); /* indicate tape labeled */
226 Jmsg(jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
227 jcr->VolumeName, dev_name(dev));
228 goto read_volume; /* read label we just wrote */
230 /* NOTE! Fall-through wanted. */
234 /* Send error message */
235 Jmsg(jcr, M_WARNING, 0, "%s", jcr->errmsg);
237 /* was - goto ask_again; */
244 * See if we have a fresh tape or a tape with data.
246 * Note, if the LabelType is PRE_LABEL, it was labeled
247 * but never written. If so, rewrite the label but set as
248 * VOL_LABEL. We rewind and return the label (reconstructed)
249 * in the block so that in the case of a new tape, data can
250 * be appended just after the block label. If we are writing
251 * a second volume, the calling routine will write the label
252 * before writing the overflow block.
254 * If the tape is marked as Recycle, we rewrite the label.
256 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
257 Dmsg1(190, "ready_for_append found freshly labeled volume. dev=%x\n", dev);
258 dev->VolHdr.LabelType = VOL_LABEL; /* set Volume label */
259 write_volume_label_to_block(jcr, dev, block);
261 * If we are not dealing with a streaming device,
262 * write the block now to ensure we have write permission.
263 * It is better to find out now rather than later.
265 if (!dev_cap(dev, CAP_STREAM)) {
266 if (!rewind_dev(dev)) {
267 Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
268 dev_name(dev), strerror_dev(dev));
271 if (!truncate_dev(dev)) {
272 Jmsg2(jcr, M_WARNING, 0, _("Truncate error on device %s. ERR=%s\n"),
273 dev_name(dev), strerror_dev(dev));
276 /* Attempt write to check write permission */
277 if (!write_block_to_dev(jcr, dev, block)) {
278 Jmsg2(jcr, M_ERROR, 0, _("Unable to write device %s. ERR=%s\n"),
279 dev_name(dev), strerror_dev(dev));
283 * We do not return the label in the block, because if we are
284 * running multiple simultaneous jobs, once we release the lock
285 * some other thread may write his block over the label. So,
286 * we simply write it definitively now.
289 if (!rewind_dev(dev)) {
290 Jmsg2(jcr, M_ERROR, 0, _("Unable to rewind device %s. ERR=%s\n"),
291 dev_name(dev), strerror_dev(dev));
295 /* Recreate a correct volume label and return it in the block */
296 write_volume_label_to_block(jcr, dev, block);
299 /* Set or reset Volume statistics */
300 dev->VolCatInfo.VolCatJobs = 0;
301 dev->VolCatInfo.VolCatFiles = 0;
302 dev->VolCatInfo.VolCatBytes = 1;
303 dev->VolCatInfo.VolCatErrors = 0;
304 dev->VolCatInfo.VolCatBlocks = 0;
305 dev->VolCatInfo.VolCatRBytes = 0;
307 dev->VolCatInfo.VolCatMounts++;
308 dev->VolCatInfo.VolCatRecycles++;
310 dev->VolCatInfo.VolCatMounts = 1;
311 dev->VolCatInfo.VolCatRecycles = 0;
312 dev->VolCatInfo.VolCatWrites = 1;
313 dev->VolCatInfo.VolCatReads = 1;
315 Dmsg0(100, "dir_update_vol_info. Set Append\n");
316 bstrncpy(dev->VolCatInfo.VolCatStatus, "Append", sizeof(dev->VolCatInfo.VolCatStatus));
317 dir_update_volume_info(jcr, dev, 1); /* indicate doing relabel */
319 Jmsg(jcr, M_INFO, 0, _("Recycled volume \"%s\" on device %s, all previous data lost.\n"),
320 jcr->VolumeName, dev_name(dev));
322 Jmsg(jcr, M_INFO, 0, _("Wrote label to prelabeled Volume \"%s\" on device %s\n"),
323 jcr->VolumeName, dev_name(dev));
328 * OK, at this point, we have a valid Bacula label, but
329 * we need to position to the end of the volume, since we are
330 * just now putting it into append mode.
332 Dmsg0(200, "Device previously written, moving to end of data\n");
333 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
336 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data %s. ERR=%s\n"),
337 dev_name(dev), strerror_dev(dev));
338 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
340 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
341 Dmsg0(100, "dir_update_vol_info. Set Error.\n");
342 dir_update_volume_info(jcr, dev, 0);
345 /* *****FIXME**** we should do some checking for files too */
346 if (dev_is_tape(dev)) {
348 * Check if we are positioned on the tape at the same place
349 * that the database says we should be.
351 if (dev->VolCatInfo.VolCatFiles == dev_file(dev)) {
352 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume at file=%d.\n"),
355 Jmsg(jcr, M_ERROR, 0, _("I canot write on this volume because:\n\
356 The number of files mismatch! Volume=%u Catalog=%u\n"),
357 dev_file(dev), dev->VolCatInfo.VolCatFiles);
358 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
359 Dmsg0(100, "dir_update_vol_info. Set Error.\n");
360 dir_update_volume_info(jcr, dev, 0);
364 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
365 Dmsg1(100, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
366 dir_update_volume_info(jcr, dev, 0);
367 /* Return an empty block */
368 empty_block(block); /* we used it for reading so set for write */
370 dev->state |= ST_APPEND;
371 Dmsg0(100, "Normal return from read_dev_for_append\n");
376 int mount_next_read_volume(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
378 Dmsg2(90, "NumVolumes=%d CurVolume=%d\n", jcr->NumVolumes, jcr->CurVolume);
380 * End Of Tape -- mount next Volume (if another specified)
382 if (jcr->NumVolumes > 1 && jcr->CurVolume < jcr->NumVolumes) {
384 dev->state &= ~ST_READ;
385 if (!acquire_device_for_read(jcr, dev, block)) {
386 Jmsg2(jcr, M_FATAL, 0, "Cannot open Dev=%s, Vol=%s\n", dev_name(dev),
390 return 1; /* next volume mounted */
392 Dmsg0(90, "End of Device reached.\n");
397 * Either because we are going to hang a new volume, or because
398 * of explicit user request, we release the current volume.
400 void release_volume(JCR *jcr, DEVICE *dev)
404 Jmsg0(jcr, M_ERROR, 0, "Hey!!!!! WroteVol non-zero !!!!!\n");
407 * First erase all memory of the current volume
409 dev->block_num = dev->file = 0;
410 dev->EndBlock = dev->EndFile = 0;
411 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
412 memset(&jcr->VolCatInfo, 0, sizeof(jcr->VolCatInfo));
413 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
414 dev->state &= ~ST_LABEL; /* label not yet read */
415 jcr->VolumeName[0] = 0;
417 if ((dev->state & ST_OPENED) &&
418 (!dev_is_tape(dev) || !dev_cap(dev, CAP_ALWAYSOPEN))) {
419 offline_or_rewind_dev(dev);
423 /* If we have not closed the device, then at least rewind the tape */
424 if (dev->state & ST_OPENED) {
425 offline_or_rewind_dev(dev);