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.
47 int mount_next_write_volume(JCR *jcr, DEVICE *dev, DEV_BLOCK *block, int release)
49 int recycle, ask, retry = 0, autochanger;
51 Dmsg0(100, "Enter mount_next_volume()\n");
55 Jmsg(jcr, M_FATAL, 0, _("Too many errors trying to mount device %s.\n"),
59 if (job_canceled(jcr)) {
60 Jmsg(jcr, M_FATAL, 0, _("Job canceled.\n"));
63 recycle = ask = autochanger = 0;
65 Dmsg0(100, "mount_next_volume release=1\n");
67 * First erase all memory of the current volume
69 dev->block_num = dev->file = 0;
70 dev->EndBlock = dev->EndFile = 0;
71 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
72 memset(&jcr->VolCatInfo, 0, sizeof(jcr->VolCatInfo));
73 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
74 dev->state &= ~ST_LABEL; /* label not yet read */
75 jcr->VolumeName[0] = 0;
77 if (!dev_is_tape(dev) || !dev_cap(dev, CAP_ALWAYSOPEN)) {
78 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
81 * Note, this rewind probably should not be here (it wasn't
82 * in prior versions of Bacula), but on FreeBSD, this is
83 * needed in the case the tape was "frozen" due to an error
84 * such as backspacing after writing and EOF. If it is not
85 * done, all future references to the drive get and I/O error.
87 } else if (!rewind_dev(dev)) {
88 Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
89 dev_name(dev), strerror_dev(dev));
94 /* If we have not closed the device, then at least rewind the tape */
95 if (dev->state & ST_OPENED) {
96 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
98 } else if (!rewind_dev(dev)) {
99 Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
100 dev_name(dev), strerror_dev(dev));
103 ask = 1; /* ask operator to mount tape */
107 * Get Director's idea of what tape we should have mounted.
109 if (!dir_find_next_appendable_volume(jcr) &&
110 !dir_ask_sysop_to_mount_next_volume(jcr, dev)) {
113 Dmsg2(100, "After find_next_append. Vol=%s Slot=%d\n",
114 jcr->VolCatInfo.VolCatName, jcr->VolCatInfo.Slot);
117 * Get next volume and ready it for append
118 * This code ensures that the device is ready for
119 * writing. We start from the assumption that there
120 * may not be a tape mounted.
122 * If the device is a file, we create the output
123 * file. If it is a tape, we check the volume name
124 * and move the tape to the end of data.
126 * It assumes that the device is not already in use!
130 Dmsg0(100, "Enter ready_dev_for_append\n");
132 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
134 jcr->VolFirstIndex = jcr->JobFiles; /* first update of Vol FileIndex */
136 int vol_label_status;
137 autochanger = autoload_device(jcr, dev, 1, NULL);
140 * If we autochanged to correct Volume or (we have not just
141 * released the Volume AND we can automount) we go ahead
142 * and read the label. If there is no tape in the drive,
143 * we will err, recurse and ask the operator the next time.
145 if (autochanger || (!release && dev_is_tape(dev) && dev_cap(dev, CAP_AUTOMOUNT))) {
146 ask = 0; /* don't ask SYSOP this time */
149 release = 1; /* release next time if we "recurse" */
152 if (ask && !dir_ask_sysop_to_mount_next_volume(jcr, dev)) {
153 Dmsg0(100, "Error return ask_sysop ...\n");
154 return 0; /* error return */
156 Dmsg1(100, "want vol=%s\n", jcr->VolumeName);
159 if (!(dev->state & ST_OPENED)) {
161 if (dev_cap(dev, CAP_STREAM)) {
162 mode = OPEN_WRITE_ONLY;
164 mode = OPEN_READ_WRITE;
166 if (open_dev(dev, jcr->VolCatInfo.VolCatName, mode) < 0) {
167 Jmsg2(jcr, M_FATAL, 0, _("Unable to open device %s. ERR=%s\n"),
168 dev_name(dev), strerror_dev(dev));
174 * Now make sure we have the right tape mounted
178 * If we are writing to a stream device, ASSUME the volume label
181 if (dev_cap(dev, CAP_STREAM)) {
182 vol_label_status = VOL_OK;
183 create_volume_label(dev, jcr->VolumeName);
184 dev->VolHdr.LabelType = PRE_LABEL;
186 vol_label_status = read_dev_volume_label(jcr, dev, block);
189 * At this point, dev->VolCatInfo has what is in the drive, if anything,
190 * and jcr->VolCatInfo has what the Director wants.
192 switch (vol_label_status) {
194 Dmsg1(100, "Vol OK name=%s\n", jcr->VolumeName);
195 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(jcr->VolCatInfo));
196 if (strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0) {
199 break; /* got a Volume */
201 VOLUME_CAT_INFO VolCatInfo;
203 Dmsg1(100, "Vol NAME Error Name=%s\n", jcr->VolumeName);
205 * OK, we got a different volume mounted. First save the
206 * requested Volume info (jcr) structure, then query if
207 * this volume is really OK. If not, put back the desired
208 * volume name and continue.
210 memcpy(&VolCatInfo, &jcr->VolCatInfo, sizeof(jcr->VolCatInfo));
211 /* Check if this is a valid Volume in the pool */
212 pm_strcpy(&jcr->VolumeName, dev->VolHdr.VolName);
213 if (!dir_get_volume_info(jcr, 1)) {
214 Mmsg(&jcr->errmsg, _("Director wanted Volume \"%s\".\n"
215 " Current Volume \"%s\" not acceptable because:\n"
217 VolCatInfo.VolCatName, dev->VolHdr.VolName,
218 jcr->dir_bsock->msg);
219 /* Restore desired volume name, note device info out of sync */
220 memcpy(&jcr->VolCatInfo, &VolCatInfo, sizeof(jcr->VolCatInfo));
223 Dmsg1(100, "want new name=%s\n", jcr->VolumeName);
224 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(jcr->VolCatInfo));
225 break; /* got a Volume */
229 Dmsg1(500, "Vol NO_LABEL or IO_ERROR name=%s\n", jcr->VolumeName);
230 /* If permitted, create a label */
231 if (dev_cap(dev, CAP_LABEL)) {
232 Dmsg0(100, "Create volume label\n");
233 if (!write_volume_label_to_dev(jcr, (DEVRES *)dev->device, jcr->VolumeName,
235 Dmsg0(100, "!write_vol_label\n");
238 Jmsg(jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
239 jcr->VolumeName, dev_name(dev));
240 goto read_volume; /* read label we just wrote */
242 /* NOTE! Fall-through wanted. */
245 /* Send error message */
246 Jmsg1(jcr, M_WARNING, 0, "%s", jcr->errmsg);
247 Dmsg0(100, "Default\n");
255 * See if we have a fresh tape or tape with data.
257 * Note, if the LabelType is PRE_LABEL, it was labeled
258 * but never written. If so, rewrite the label but set as
259 * VOL_LABEL. We rewind and return the label (reconstructed)
260 * in the block so that in the case of a new tape, data can
261 * be appended just after the block label. If we are writing
262 * an second volume, the calling routine will write the label
263 * before writing the overflow block.
265 * If the tape is marked as Recycle, we rewrite the label.
267 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
268 Dmsg1(190, "ready_for_append found freshly labeled volume. dev=%x\n", dev);
269 dev->VolHdr.LabelType = VOL_LABEL; /* set Volume label */
270 write_volume_label_to_block(jcr, dev, block);
272 * If we are not dealing with a streaming device,
273 * write the block now to ensure we have write permission.
274 * It is better to find out now rather than later.
276 if (!dev_cap(dev, CAP_STREAM)) {
277 dev->VolCatInfo.VolCatBytes = 0;
278 if (!rewind_dev(dev)) {
279 Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
280 dev_name(dev), strerror_dev(dev));
283 if (!truncate_dev(dev)) {
284 Jmsg2(jcr, M_WARNING, 0, _("Truncate error on device %s. ERR=%s\n"),
285 dev_name(dev), strerror_dev(dev));
288 /* Attempt write to check write permission */
289 if (!write_block_to_dev(jcr, dev, block)) {
290 Jmsg2(jcr, M_ERROR, 0, _("Unable to write device %s. ERR=%s\n"),
291 dev_name(dev), strerror_dev(dev));
294 if (!rewind_dev(dev)) {
295 Jmsg2(jcr, M_ERROR, 0, _("Unable to rewind device %s. ERR=%s\n"),
296 dev_name(dev), strerror_dev(dev));
300 /* Recreate a correct volume label and return it in the block */
301 write_volume_label_to_block(jcr, dev, block);
303 /* Set or reset Volume statistics */
304 dev->VolCatInfo.VolCatJobs = 0;
305 dev->VolCatInfo.VolCatFiles = 0;
306 dev->VolCatInfo.VolCatErrors = 0;
307 dev->VolCatInfo.VolCatBlocks = 0;
308 dev->VolCatInfo.VolCatRBytes = 0;
310 dev->VolCatInfo.VolCatMounts++;
311 dev->VolCatInfo.VolCatRecycles++;
313 dev->VolCatInfo.VolCatMounts = 1;
314 dev->VolCatInfo.VolCatRecycles = 0;
315 dev->VolCatInfo.VolCatWrites = 1;
316 dev->VolCatInfo.VolCatReads = 1;
318 strcpy(dev->VolCatInfo.VolCatStatus, "Append");
319 Dmsg0(200, "dir_update_vol_info. Set Append\n");
320 dir_update_volume_info(jcr, &dev->VolCatInfo, 1); /* indicate doing relabel */
322 Jmsg(jcr, M_INFO, 0, _("Recycled volume \"%s\" on device %s, all previous data lost.\n"),
323 jcr->VolumeName, dev_name(dev));
325 Jmsg(jcr, M_INFO, 0, _("Wrote label to prelabeled Volume \"%s\" on device %s\n"),
326 jcr->VolumeName, dev_name(dev));
331 * OK, at this point, we have a valid Bacula label, but
332 * we need to position to the end of the volume, since we are
333 * just now putting it into append mode.
335 Dmsg0(200, "Device previously written, moving to end of data\n");
336 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
339 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data %s. ERR=%s\n"),
340 dev_name(dev), strerror_dev(dev));
341 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
343 strcpy(dev->VolCatInfo.VolCatStatus, "Error");
344 Dmsg0(200, "dir_update_vol_info. Set Error.\n");
345 dir_update_volume_info(jcr, &dev->VolCatInfo, 0);
348 /* *****FIXME**** we should do some checking for files too */
349 if (dev_is_tape(dev)) {
351 * Check if we are positioned on the tape at the same place
352 * that the database says we should be.
354 if (dev->VolCatInfo.VolCatFiles == dev_file(dev)) {
355 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume at file=%d.\n"),
358 Jmsg(jcr, M_ERROR, 0, _("I canot write on this volume because:\n\
359 The number of files mismatch! Volume=%d Catalog=%d\n"),
360 dev_file(dev), dev->VolCatInfo.VolCatFiles);
361 strcpy(dev->VolCatInfo.VolCatStatus, "Error");
362 Dmsg0(200, "dir_update_vol_info. Set Error.\n");
363 dir_update_volume_info(jcr, &dev->VolCatInfo, 0);
367 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
368 Dmsg1(200, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
369 dir_update_volume_info(jcr, &dev->VolCatInfo, 0);
370 /* Return an empty block */
371 empty_block(block); /* we used it for reading so set for write */
373 dev->state |= ST_APPEND;
374 Dmsg0(100, "Normal return from read_dev_for_append\n");
379 int mount_next_read_volume(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
381 Dmsg2(90, "NumVolumes=%d CurVolume=%d\n", jcr->NumVolumes, jcr->CurVolume);
383 * End Of Tape -- mount next Volume (if another specified)
385 if (jcr->NumVolumes > 1 && jcr->CurVolume < jcr->NumVolumes) {
387 dev->state &= ~ST_READ;
388 if (!acquire_device_for_read(jcr, dev, block)) {
389 Emsg2(M_FATAL, 0, "Cannot open Dev=%s, Vol=%s\n", dev_name(dev),
393 return 1; /* next volume mounted */
395 Dmsg0(90, "End of Device reached.\n");