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 canceled.\n"));
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.
76 Dmsg0(100, "Before dir_find_next\n");
77 if (!dir_find_next_appendable_volume(jcr)) {
78 Dmsg0(100, "not dir_find_next\n");
79 if (!dir_ask_sysop_to_mount_next_volume(jcr, dev)) {
83 Dmsg2(100, "After find_next_append. Vol=%s Slot=%d\n",
84 jcr->VolCatInfo.VolCatName, jcr->VolCatInfo.Slot);
87 * Get next volume and ready it for append
88 * This code ensures that the device is ready for
89 * writing. We start from the assumption that there
90 * may not be a tape mounted.
92 * If the device is a file, we create the output
93 * file. If it is a tape, we check the volume name
94 * and move the tape to the end of data.
96 * It assumes that the device is not already in use!
101 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
104 int vol_label_status;
105 autochanger = autoload_device(jcr, dev, 1, NULL);
106 Dmsg1(100, "autoload_dev returns %d\n", autochanger);
109 * If we autochanged to correct Volume or (we have not just
110 * released the Volume AND we can automount) we go ahead
111 * and read the label. If there is no tape in the drive,
112 * we will err, recurse and ask the operator the next time.
114 if (autochanger || (!release && dev_is_tape(dev) && dev_cap(dev, CAP_AUTOMOUNT))) {
115 ask = false; /* don't ask SYSOP this time */
117 Dmsg2(100, "Ask=%d autochanger=%d\n", ask, autochanger);
118 release = 1; /* release next time if we "recurse" */
120 if (ask && !dir_ask_sysop_to_mount_next_volume(jcr, dev)) {
121 Dmsg0(100, "Error return ask_sysop ...\n");
122 return 0; /* error return */
124 Dmsg1(100, "want vol=%s\n", jcr->VolumeName);
127 if (!(dev->state & ST_OPENED)) {
129 if (dev_cap(dev, CAP_STREAM)) {
130 mode = OPEN_WRITE_ONLY;
132 mode = OPEN_READ_WRITE;
134 if (open_dev(dev, jcr->VolCatInfo.VolCatName, mode) < 0) {
135 Jmsg2(jcr, M_FATAL, 0, _("Unable to open device %s. ERR=%s\n"),
136 dev_name(dev), strerror_dev(dev));
142 * Now make sure we have the right tape mounted
146 * If we are writing to a stream device, ASSUME the volume label
149 if (dev_cap(dev, CAP_STREAM)) {
150 vol_label_status = VOL_OK;
151 create_volume_label(dev, jcr->VolumeName, "Default");
152 dev->VolHdr.LabelType = PRE_LABEL;
154 vol_label_status = read_dev_volume_label(jcr, dev, block);
156 Dmsg2(100, "dirVol=%s dirStat=%s\n", jcr->VolumeName,
157 jcr->VolCatInfo.VolCatStatus);
159 * At this point, dev->VolCatInfo has what is in the drive, if anything,
160 * and jcr->VolCatInfo has what the Director wants.
162 switch (vol_label_status) {
164 Dmsg1(100, "Vol OK name=%s\n", jcr->VolumeName);
165 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(jcr->VolCatInfo));
166 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
167 break; /* got a Volume */
169 VOLUME_CAT_INFO VolCatInfo;
171 Dmsg1(100, "Vol NAME Error Name=%s\n", jcr->VolumeName);
173 * OK, we got a different volume mounted. First save the
174 * requested Volume info (jcr) structure, then query if
175 * this volume is really OK. If not, put back the desired
176 * volume name and continue.
178 memcpy(&VolCatInfo, &jcr->VolCatInfo, sizeof(VolCatInfo));
179 /* Check if this is a valid Volume in the pool */
180 pm_strcpy(&jcr->VolumeName, dev->VolHdr.VolName);
181 if (!dir_get_volume_info(jcr, GET_VOL_INFO_FOR_WRITE)) {
182 Mmsg(&jcr->errmsg, _("Director wanted Volume \"%s\".\n"
183 " Current Volume \"%s\" not acceptable because:\n"
185 VolCatInfo.VolCatName, dev->VolHdr.VolName,
186 jcr->dir_bsock->msg);
187 /* Restore desired volume name, note device info out of sync */
188 memcpy(&jcr->VolCatInfo, &VolCatInfo, sizeof(jcr->VolCatInfo));
191 Dmsg1(100, "want new name=%s\n", jcr->VolumeName);
192 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(dev->VolCatInfo));
193 recycle = strcmp(dev->VolCatInfo.VolCatStatus, "Recycle") == 0;
194 break; /* got a Volume */
196 * At this point, we assume we have a blank tape mounted.
201 * If permitted, we label the device, make sure we can do
202 * it by checking that the VolCatBytes is zero => not labeled.
203 * As noted above, at this point jcr->VolCatInfo has what
204 * the Director wants and dev->VolCatInfo has info on the
205 * previous tape (or nothing).
207 if (dev_cap(dev, CAP_LABEL) && jcr->VolCatInfo.VolCatBytes == 0) {
208 Dmsg0(100, "Create volume label\n");
209 if (!write_volume_label_to_dev(jcr, (DEVRES *)dev->device, jcr->VolumeName,
211 Dmsg0(100, "!write_vol_label\n");
214 Dmsg0(200, "dir_update_vol_info. Set Append\n");
215 /* Copy Director's info into the device info */
216 memcpy(&dev->VolCatInfo, &jcr->VolCatInfo, sizeof(dev->VolCatInfo));
217 dir_update_volume_info(jcr, &dev->VolCatInfo, 1); /* indicate tape labeled */
218 Jmsg(jcr, M_INFO, 0, _("Labeled new Volume \"%s\" on device %s.\n"),
219 jcr->VolumeName, dev_name(dev));
220 goto read_volume; /* read label we just wrote */
222 /* NOTE! Fall-through wanted. */
226 /* Send error message */
227 Jmsg1(jcr, M_WARNING, 0, "%s", jcr->errmsg);
228 Dmsg0(100, "Default\n");
230 /* was - goto ask_again; */
237 * See if we have a fresh tape or a tape with data.
239 * Note, if the LabelType is PRE_LABEL, it was labeled
240 * but never written. If so, rewrite the label but set as
241 * VOL_LABEL. We rewind and return the label (reconstructed)
242 * in the block so that in the case of a new tape, data can
243 * be appended just after the block label. If we are writing
244 * a second volume, the calling routine will write the label
245 * before writing the overflow block.
247 * If the tape is marked as Recycle, we rewrite the label.
249 if (dev->VolHdr.LabelType == PRE_LABEL || recycle) {
250 Dmsg1(190, "ready_for_append found freshly labeled volume. dev=%x\n", dev);
251 dev->VolHdr.LabelType = VOL_LABEL; /* set Volume label */
252 write_volume_label_to_block(jcr, dev, block);
254 * If we are not dealing with a streaming device,
255 * write the block now to ensure we have write permission.
256 * It is better to find out now rather than later.
258 if (!dev_cap(dev, CAP_STREAM)) {
259 if (!rewind_dev(dev)) {
260 Jmsg2(jcr, M_WARNING, 0, _("Rewind error on device %s. ERR=%s\n"),
261 dev_name(dev), strerror_dev(dev));
264 if (!truncate_dev(dev)) {
265 Jmsg2(jcr, M_WARNING, 0, _("Truncate error on device %s. ERR=%s\n"),
266 dev_name(dev), strerror_dev(dev));
269 /* Attempt write to check write permission */
270 if (!write_block_to_dev(jcr, dev, block)) {
271 Jmsg2(jcr, M_ERROR, 0, _("Unable to write device %s. ERR=%s\n"),
272 dev_name(dev), strerror_dev(dev));
275 if (!rewind_dev(dev)) {
276 Jmsg2(jcr, M_ERROR, 0, _("Unable to rewind device %s. ERR=%s\n"),
277 dev_name(dev), strerror_dev(dev));
281 /* Recreate a correct volume label and return it in the block */
282 write_volume_label_to_block(jcr, dev, block);
284 /* Set or reset Volume statistics */
285 dev->VolCatInfo.VolCatJobs = 0;
286 dev->VolCatInfo.VolCatFiles = 0;
287 dev->VolCatInfo.VolCatBytes = 1;
288 dev->VolCatInfo.VolCatErrors = 0;
289 dev->VolCatInfo.VolCatBlocks = 0;
290 dev->VolCatInfo.VolCatRBytes = 0;
292 dev->VolCatInfo.VolCatMounts++;
293 dev->VolCatInfo.VolCatRecycles++;
295 dev->VolCatInfo.VolCatMounts = 1;
296 dev->VolCatInfo.VolCatRecycles = 0;
297 dev->VolCatInfo.VolCatWrites = 1;
298 dev->VolCatInfo.VolCatReads = 1;
300 Dmsg0(200, "dir_update_vol_info. Set Append\n");
301 bstrncpy(dev->VolCatInfo.VolCatStatus, "Append", sizeof(dev->VolCatInfo.VolCatStatus));
302 dir_update_volume_info(jcr, &dev->VolCatInfo, 1); /* indicate doing relabel */
304 Jmsg(jcr, M_INFO, 0, _("Recycled volume \"%s\" on device %s, all previous data lost.\n"),
305 jcr->VolumeName, dev_name(dev));
307 Jmsg(jcr, M_INFO, 0, _("Wrote label to prelabeled Volume \"%s\" on device %s\n"),
308 jcr->VolumeName, dev_name(dev));
313 * OK, at this point, we have a valid Bacula label, but
314 * we need to position to the end of the volume, since we are
315 * just now putting it into append mode.
317 Dmsg0(200, "Device previously written, moving to end of data\n");
318 Jmsg(jcr, M_INFO, 0, _("Volume \"%s\" previously written, moving to end of data.\n"),
321 Jmsg(jcr, M_ERROR, 0, _("Unable to position to end of data %s. ERR=%s\n"),
322 dev_name(dev), strerror_dev(dev));
323 Jmsg(jcr, M_INFO, 0, _("Marking Volume \"%s\" in Error in Catalog.\n"),
325 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
326 Dmsg0(200, "dir_update_vol_info. Set Error.\n");
327 dir_update_volume_info(jcr, &dev->VolCatInfo, 0);
330 /* *****FIXME**** we should do some checking for files too */
331 if (dev_is_tape(dev)) {
333 * Check if we are positioned on the tape at the same place
334 * that the database says we should be.
336 if (dev->VolCatInfo.VolCatFiles == dev_file(dev)) {
337 Jmsg(jcr, M_INFO, 0, _("Ready to append to end of Volume at file=%d.\n"),
340 Jmsg(jcr, M_ERROR, 0, _("I canot write on this volume because:\n\
341 The number of files mismatch! Volume=%u Catalog=%u\n"),
342 dev_file(dev), dev->VolCatInfo.VolCatFiles);
343 bstrncpy(dev->VolCatInfo.VolCatStatus, "Error", sizeof(dev->VolCatInfo.VolCatStatus));
344 Dmsg0(200, "dir_update_vol_info. Set Error.\n");
345 dir_update_volume_info(jcr, &dev->VolCatInfo, 0);
349 dev->VolCatInfo.VolCatMounts++; /* Update mounts */
350 Dmsg1(200, "update volinfo mounts=%d\n", dev->VolCatInfo.VolCatMounts);
351 dir_update_volume_info(jcr, &dev->VolCatInfo, 0);
352 /* Return an empty block */
353 empty_block(block); /* we used it for reading so set for write */
355 dev->state |= ST_APPEND;
356 Dmsg0(100, "Normal return from read_dev_for_append\n");
361 int mount_next_read_volume(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
363 Dmsg2(90, "NumVolumes=%d CurVolume=%d\n", jcr->NumVolumes, jcr->CurVolume);
365 * End Of Tape -- mount next Volume (if another specified)
367 if (jcr->NumVolumes > 1 && jcr->CurVolume < jcr->NumVolumes) {
369 dev->state &= ~ST_READ;
370 if (!acquire_device_for_read(jcr, dev, block)) {
371 Jmsg2(jcr, M_FATAL, 0, "Cannot open Dev=%s, Vol=%s\n", dev_name(dev),
375 return 1; /* next volume mounted */
377 Dmsg0(90, "End of Device reached.\n");
382 * Either because we are going to hang a new volume, or because
383 * of explicit user request, we release the current volume.
385 void release_volume(JCR *jcr, DEVICE *dev)
389 Jmsg0(jcr, M_ERROR, 0, "Hey!!!!! WroteVol non-zero !!!!!\n");
392 * First erase all memory of the current volume
394 dev->block_num = dev->file = 0;
395 dev->EndBlock = dev->EndFile = 0;
396 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
397 memset(&jcr->VolCatInfo, 0, sizeof(jcr->VolCatInfo));
398 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
399 dev->state &= ~ST_LABEL; /* label not yet read */
400 jcr->VolumeName[0] = 0;
402 if ((dev->state & ST_OPENED) &&
403 (!dev_is_tape(dev) || !dev_cap(dev, CAP_ALWAYSOPEN))) {
404 offline_or_rewind_dev(dev);
408 /* If we have not closed the device, then at least rewind the tape */
409 if (dev->state & ST_OPENED) {
410 offline_or_rewind_dev(dev);