3 * dev.c -- low level operations on device (storage device)
7 * NOTE!!!! None of these routines are reentrant. You must
8 * use lock_device() and unlock_device() at a higher level,
9 * or use the xxx_device() equivalents. By moving the
10 * thread synchronization to a higher level, we permit
11 * the higher level routines to "seize" the device and
12 * to carry out operations without worrying about who
13 * set what lock (i.e. race conditions).
15 * Note, this is the device dependent code, and my have
16 * to be modified for each system, but is meant to
17 * be as "generic" as possible.
19 * The purpose of this code is to develop a SIMPLE Storage
20 * daemon. More complicated coding (double buffering, writer
21 * thread, ...) is left for a later version.
23 * Unfortunately, I have had to add more and more complication
24 * to this code. This was not foreseen as noted above, and as
25 * a consequence has lead to something more contorted than is
26 * really necessary -- KES. Note, this contortion has been
27 * corrected to a large extent by a rewrite (Apr MMI).
32 Copyright (C) 2000-2004 Kern Sibbald and John Walker
34 This program is free software; you can redistribute it and/or
35 modify it under the terms of the GNU General Public License as
36 published by the Free Software Foundation; either version 2 of
37 the License, or (at your option) any later version.
39 This program is distributed in the hope that it will be useful,
40 but WITHOUT ANY WARRANTY; without even the implied warranty of
41 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
42 General Public License for more details.
44 You should have received a copy of the GNU General Public
45 License along with this program; if not, write to the Free
46 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
52 * Handling I/O errors and end of tape conditions are a bit tricky.
53 * This is how it is currently done when writting.
54 * On either an I/O error or end of tape,
55 * we will stop writing on the physical device (no I/O recovery is
56 * attempted at least in this daemon). The state flag will be sent
57 * to include ST_EOT, which is ephimeral, and ST_WEOT, which is
58 * persistent. Lots of routines clear ST_EOT, but ST_WEOT is
59 * cleared only when the problem goes away. Now when ST_WEOT
60 * is set all calls to write_block_to_device() call the fix_up
61 * routine. In addition, all threads are blocked
62 * from writing on the tape by calling lock_dev(), and thread other
63 * than the first thread to hit the EOT will block on a condition
64 * variable. The first thread to hit the EOT will continue to
65 * be able to read and write the tape (he sort of tunnels through
66 * the locking mechanism -- see lock_dev() for details).
68 * Now presumably somewhere higher in the chain of command
69 * (device.c), someone will notice the EOT condition and
70 * get a new tape up, get the tape label read, and mark
71 * the label for rewriting. Then this higher level routine
72 * will write the unwritten buffer to the new volume.
73 * Finally, he will release
74 * any blocked threads by doing a broadcast on the condition
75 * variable. At that point, we should be totally back in
76 * business with no lost data.
83 /* Forward referenced functions */
86 * Allocate and initialize the DEVICE structure
87 * Note, if dev is non-NULL, it is already allocated,
88 * thus we neither allocate it nor free it. This allows
89 * the caller to put the packet in shared memory.
91 * Note, for a tape, the device->device_name is the device name
92 * (e.g. /dev/nst0), and for a file, the device name
93 * is the directory in which the file will be placed.
97 init_dev(DEVICE *dev, DEVRES *device)
104 /* Check that device is available */
105 if (stat(device->device_name, &statp) < 0) {
107 dev->dev_errno = errno;
109 Emsg2(M_FATAL, 0, "Unable to stat device %s : %s\n", device->device_name,
115 if (S_ISDIR(statp.st_mode)) {
117 } else if (S_ISCHR(statp.st_mode)) {
119 } else if (S_ISFIFO(statp.st_mode)) {
123 dev->dev_errno = ENODEV;
125 Emsg2(M_FATAL, 0, _("%s is an unknown device type. Must be tape or directory. st_mode=%x\n"),
126 device->device_name, statp.st_mode);
130 dev = (DEVICE *)get_memory(sizeof(DEVICE));
131 memset(dev, 0, sizeof(DEVICE));
132 dev->state = ST_MALLOC;
134 memset(dev, 0, sizeof(DEVICE));
137 /* Copy user supplied device parameters from Resource */
138 dev->dev_name = get_memory(strlen(device->device_name)+1);
139 strcpy(dev->dev_name, device->device_name);
140 dev->capabilities = device->cap_bits;
141 dev->min_block_size = device->min_block_size;
142 dev->max_block_size = device->max_block_size;
143 dev->max_volume_size = device->max_volume_size;
144 dev->max_file_size = device->max_file_size;
145 dev->volume_capacity = device->volume_capacity;
146 dev->max_rewind_wait = device->max_rewind_wait;
147 dev->max_open_wait = device->max_open_wait;
148 dev->max_open_vols = device->max_open_vols;
149 dev->vol_poll_interval = device->vol_poll_interval;
150 dev->max_spool_size = device->max_spool_size;
152 if (dev->vol_poll_interval && dev->vol_poll_interval < 60) {
153 dev->vol_poll_interval = 60;
155 dev->device = device;
158 dev->state |= ST_TAPE;
160 dev->state |= ST_FIFO;
161 dev->capabilities |= CAP_STREAM; /* set stream device */
163 dev->state |= ST_FILE;
166 if (dev->max_block_size > 1000000) {
167 Emsg3(M_ERROR, 0, _("Block size %u on device %s is too large, using default %u\n"),
168 dev->max_block_size, dev->dev_name, DEFAULT_BLOCK_SIZE);
169 dev->max_block_size = 0;
171 if (dev->max_block_size % TAPE_BSIZE != 0) {
172 Emsg2(M_WARNING, 0, _("Max block size %u not multiple of device %s block size.\n"),
173 dev->max_block_size, dev->dev_name);
176 dev->errmsg = get_pool_memory(PM_EMSG);
179 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
180 dev->dev_errno = errstat;
181 Mmsg1(&dev->errmsg, _("Unable to init mutex: ERR=%s\n"), strerror(errstat));
182 Emsg0(M_FATAL, 0, dev->errmsg);
184 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
185 dev->dev_errno = errstat;
186 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
187 Emsg0(M_FATAL, 0, dev->errmsg);
189 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
190 dev->dev_errno = errstat;
191 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
192 Emsg0(M_FATAL, 0, dev->errmsg);
194 if ((errstat = pthread_mutex_init(&dev->spool_mutex, NULL)) != 0) {
195 dev->dev_errno = errstat;
196 Mmsg1(&dev->errmsg, _("Unable to init mutex: ERR=%s\n"), strerror(errstat));
197 Emsg0(M_FATAL, 0, dev->errmsg);
200 dev->attached_dcrs = new dlist(dcr, &dcr->dev_link);
201 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
206 /* Open the device with the operating system and
207 * initialize buffer pointers.
209 * Note, for a tape, the VolName is the name we give to the
210 * volume (not really used here), but for a file, the
211 * VolName represents the name of the file to be created/opened.
212 * In the case of a file, the full name is the device name
213 * (archive_name) with the VolName concatenated.
216 open_dev(DEVICE *dev, char *VolName, int mode)
218 POOLMEM *archive_name;
220 if (dev->state & ST_OPENED) {
222 * *****FIXME***** how to handle two threads wanting
223 * different volumes mounted???? E.g. one is waiting
224 * for the next volume to be mounted, and a new job
225 * starts and snatches up the device.
227 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
231 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
232 dev->dev_name, dev->use_count);
233 Emsg1(M_WARNING, 0, "%s", dev->errmsg);
237 bstrncpy(dev->VolCatInfo.VolCatName, VolName, sizeof(dev->VolCatInfo.VolCatName));
240 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
241 dev->dev_name, dev->VolCatInfo.VolCatName);
242 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
243 if (dev->state & (ST_TAPE|ST_FIFO)) {
245 Dmsg0(29, "open_dev: device is tape\n");
246 if (mode == OPEN_READ_WRITE) {
247 dev->mode = O_RDWR | O_BINARY;
248 } else if (mode == OPEN_READ_ONLY) {
249 dev->mode = O_RDONLY | O_BINARY;
250 } else if (mode == OPEN_WRITE_ONLY) {
251 dev->mode = O_WRONLY | O_BINARY;
253 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
255 timeout = dev->max_open_wait;
257 if (dev->state & ST_FIFO && timeout) {
259 dev->tid = start_thread_timer(pthread_self(), timeout);
261 /* If busy retry each second for max_open_wait seconds */
262 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
263 if (errno == EINTR || errno == EAGAIN) {
266 if (errno == EBUSY && timeout-- > 0) {
267 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->dev_name, strerror(errno));
271 dev->dev_errno = errno;
272 Mmsg2(&dev->errmsg, _("stored: unable to open device %s: ERR=%s\n"),
273 dev->dev_name, strerror(dev->dev_errno));
274 /* Stop any open timer we set */
276 stop_thread_timer(dev->tid);
279 Emsg0(M_FATAL, 0, dev->errmsg);
284 dev->state |= ST_OPENED;
286 update_pos_dev(dev); /* update position */
288 /* Stop any open() timer we started */
290 stop_thread_timer(dev->tid);
293 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
296 * Handle opening of File Archive (not a tape)
298 if (VolName == NULL || *VolName == 0) {
299 Mmsg(&dev->errmsg, _("Could not open file device %s. No Volume name given.\n"),
303 archive_name = get_pool_memory(PM_FNAME);
304 pm_strcpy(&archive_name, dev->dev_name);
305 if (archive_name[strlen(archive_name)] != '/') {
306 pm_strcat(&archive_name, "/");
308 pm_strcat(&archive_name, VolName);
309 Dmsg1(29, "open_dev: device is disk %s\n", archive_name);
310 if (mode == OPEN_READ_WRITE) {
311 dev->mode = O_CREAT | O_RDWR | O_BINARY;
312 } else if (mode == OPEN_READ_ONLY) {
313 dev->mode = O_RDONLY | O_BINARY;
314 } else if (mode == OPEN_WRITE_ONLY) {
315 dev->mode = O_WRONLY | O_BINARY;
317 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
319 /* If creating file, give 0640 permissions */
320 if ((dev->fd = open(archive_name, dev->mode, 0640)) < 0) {
321 dev->dev_errno = errno;
322 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name, strerror(dev->dev_errno));
323 Emsg0(M_FATAL, 0, dev->errmsg);
326 dev->state |= ST_OPENED;
328 update_pos_dev(dev); /* update position */
330 Dmsg1(29, "open_dev: disk fd=%d opened\n", dev->fd);
331 free_pool_memory(archive_name);
338 int _rewind_dev(char *file, int line, DEVICE *dev)
340 Dmsg2(100, "rewind_dev called from %s:%d\n", file, line);
341 return rewind_dev(dev);
348 * Returns: 1 on success
351 int rewind_dev(DEVICE *dev)
356 Dmsg1(29, "rewind_dev %s\n", dev->dev_name);
358 dev->dev_errno = EBADF;
359 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
361 Emsg0(M_FATAL, 0, dev->errmsg);
364 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
365 dev->block_num = dev->file = 0;
367 if (dev->state & ST_TAPE) {
368 mt_com.mt_op = MTREW;
370 /* If we get an I/O error on rewind, it is probably because
371 * the drive is actually busy. We loop for (about 5 minutes)
372 * retrying every 5 seconds.
374 for (i=dev->max_rewind_wait; ; i -= 5) {
375 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
376 if (i == dev->max_rewind_wait) {
377 Dmsg1(200, "Rewind error, %s. retrying ...\n", strerror(errno));
379 clrerror_dev(dev, MTREW);
380 if (dev->dev_errno == EIO && i > 0) {
381 Dmsg0(200, "Sleeping 5 seconds.\n");
385 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
386 dev->dev_name, strerror(dev->dev_errno));
391 } else if (dev->state & ST_FILE) {
392 if (lseek(dev->fd, (off_t)0, SEEK_SET) < 0) {
393 dev->dev_errno = errno;
394 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
395 dev->dev_name, strerror(dev->dev_errno));
403 * Position device to end of medium (end of data)
404 * Returns: 1 on succes
411 struct mtget mt_stat;
415 Dmsg0(29, "eod_dev\n");
416 if (dev->state & ST_EOT) {
419 dev->state &= ~(ST_EOF); /* remove EOF flags */
420 dev->block_num = dev->file = 0;
422 if (dev->state & (ST_FIFO | ST_PROG)) {
425 if (!(dev->state & ST_TAPE)) {
426 pos = lseek(dev->fd, (off_t)0, SEEK_END);
427 // Dmsg1(100, "====== Seek to %lld\n", pos);
430 dev->state |= ST_EOT;
433 dev->dev_errno = errno;
434 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
435 dev->dev_name, strerror(dev->dev_errno));
440 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
441 struct mtget mt_stat;
442 Dmsg0(100,"Using FAST FSF for EOM\n");
443 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 && mt_stat.mt_fileno <= 0) {
444 if (!rewind_dev(dev)) {
448 mt_com.mt_op = MTFSF;
450 * ***FIXEM*** fix code to handle case that INT16_MAX is
453 mt_com.mt_count = INT16_MAX; /* use big positive number */
454 if (mt_com.mt_count < 0) {
455 mt_com.mt_count = INT16_MAX; /* brain damaged system */
459 if (dev_cap(dev, CAP_EOM)) {
460 Dmsg0(100,"Using EOM for EOM\n");
461 mt_com.mt_op = MTEOM;
464 if (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM)) {
465 if ((stat=ioctl(dev->fd, MTIOCTOP, (char *)&mt_com)) < 0) {
466 Dmsg1(50, "ioctl error: %s\n", strerror(dev->dev_errno));
467 clrerror_dev(dev, mt_com.mt_op);
469 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
470 dev->dev_name, strerror(dev->dev_errno));
474 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
475 dev->dev_errno = errno;
476 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
477 dev->dev_name, strerror(dev->dev_errno));
480 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
481 dev->file = mt_stat.mt_fileno;
484 * Rewind then use FSF until EOT reached
490 if (!rewind_dev(dev)) {
494 * Move file by file to the end of the tape
497 for (file_num=dev->file; !(dev->state & ST_EOT); file_num++) {
498 Dmsg0(200, "eod_dev: doing fsf 1\n");
499 if (!fsf_dev(dev, 1)) {
500 Dmsg0(200, "fsf_dev error.\n");
504 * Avoid infinite loop. ***FIXME*** possibly add code
505 * to set EOD or to turn off CAP_FASTFSF if on.
507 if (file_num == (int)dev->file) {
508 struct mtget mt_stat;
509 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
510 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 &&
511 mt_stat.mt_fileno >= 0) {
512 Dmsg2(000, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
513 dev->file = mt_stat.mt_fileno;
516 break; /* we are not progressing, bail out */
521 * Some drivers leave us after second EOF when doing
522 * MTEOM, so we must backup so that appending overwrites
525 if (dev_cap(dev, CAP_BSFATEOM)) {
526 struct mtget mt_stat;
527 /* Backup over EOF */
528 stat = bsf_dev(dev, 1);
529 /* If BSF worked and fileno is known (not -1), set file */
530 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 && mt_stat.mt_fileno >= 0) {
531 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
532 dev->file = mt_stat.mt_fileno;
534 dev->file++; /* wing it -- not correct on all OSes */
537 update_pos_dev(dev); /* update position */
540 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
545 * Set the position of the device -- only for files
546 * For other devices, there is no generic way to do it.
547 * Returns: 1 on succes
550 int update_pos_dev(DEVICE *dev)
556 dev->dev_errno = EBADF;
557 Mmsg0(&dev->errmsg, _("Bad device call. Archive not open\n"));
558 Emsg0(M_FATAL, 0, dev->errmsg);
562 /* Find out where we are */
563 if (dev->state & ST_FILE) {
566 pos = lseek(dev->fd, (off_t)0, SEEK_CUR);
568 Pmsg1(000, "Seek error: ERR=%s\n", strerror(dev->dev_errno));
569 dev->dev_errno = errno;
570 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
571 dev->dev_name, strerror(dev->dev_errno));
574 dev->file_addr = pos;
583 * Return the status of the device. This was meant
584 * to be a generic routine. Unfortunately, it doesn't
585 * seem possible (at least I do not know how to do it
586 * currently), which means that for the moment, this
587 * routine has very little value.
591 uint32_t status_dev(DEVICE *dev)
593 struct mtget mt_stat;
596 if (dev->state & (ST_EOT | ST_WEOT)) {
600 if (dev->state & ST_EOF) {
604 if (dev->state & ST_TAPE) {
606 Dmsg0(-20," Bacula status:");
607 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
608 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
609 dev->dev_errno = errno;
610 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
611 dev->dev_name, strerror(dev->dev_errno));
614 Dmsg0(-20, " Device status:");
616 #if defined(HAVE_LINUX_OS)
617 if (GMT_EOF(mt_stat.mt_gstat)) {
621 if (GMT_BOT(mt_stat.mt_gstat)) {
625 if (GMT_EOT(mt_stat.mt_gstat)) {
629 if (GMT_SM(mt_stat.mt_gstat)) {
633 if (GMT_EOD(mt_stat.mt_gstat)) {
637 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
639 Dmsg0(-20, " WR_PROT");
641 if (GMT_ONLINE(mt_stat.mt_gstat)) {
643 Dmsg0(-20, " ONLINE");
645 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
647 Dmsg0(-20, " DR_OPEN");
649 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
650 stat |= BMT_IM_REP_EN;
651 Dmsg0(-20, " IM_REP_EN");
653 #endif /* !SunOS && !OSF */
654 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
656 stat |= BMT_ONLINE | BMT_BOT;
663 * Load medium in device
664 * Returns: 1 on success
667 int load_dev(DEVICE *dev)
674 dev->dev_errno = EBADF;
675 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
676 Emsg0(M_FATAL, 0, dev->errmsg);
679 if (!(dev->state & ST_TAPE)) {
683 Dmsg0(200, "stored: MTLOAD command not available\n");
684 dev->dev_errno = ENOTTY; /* function not available */
685 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
686 dev->dev_name, strerror(dev->dev_errno)); return 0;
690 dev->block_num = dev->file = 0;
692 mt_com.mt_op = MTLOAD;
694 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
695 dev->dev_errno = errno;
696 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
697 dev->dev_name, strerror(dev->dev_errno)); return 0;
704 * Rewind device and put it offline
705 * Returns: 1 on success
708 int offline_dev(DEVICE *dev)
713 dev->dev_errno = EBADF;
714 Mmsg0(&dev->errmsg, _("Bad call to offline_dev. Archive not open\n"));
715 Emsg0(M_FATAL, 0, dev->errmsg);
718 if (!(dev->state & ST_TAPE)) {
722 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
723 dev->block_num = dev->file = 0;
726 mt_com.mt_op = MTUNLOCK;
728 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
730 mt_com.mt_op = MTOFFL;
732 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
733 dev->dev_errno = errno;
734 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
735 dev->dev_name, strerror(dev->dev_errno));
738 Dmsg1(100, "Offlined device %s\n", dev->dev_name);
742 int offline_or_rewind_dev(DEVICE *dev)
744 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
745 return offline_dev(dev);
748 * Note, this rewind probably should not be here (it wasn't
749 * in prior versions of Bacula), but on FreeBSD, this is
750 * needed in the case the tape was "frozen" due to an error
751 * such as backspacing after writing and EOF. If it is not
752 * done, all future references to the drive get and I/O error.
754 return rewind_dev(dev);
759 * Foward space a file
760 * Returns: 1 on success
764 fsf_dev(DEVICE *dev, int num)
766 struct mtget mt_stat;
771 dev->dev_errno = EBADF;
772 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
773 Emsg0(M_FATAL, 0, dev->errmsg);
777 if (!(dev->state & ST_TAPE)) {
780 if (dev->state & ST_EOT) {
782 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
785 if (dev->state & ST_EOF) {
786 Dmsg0(200, "ST_EOF set on entry to FSF\n");
789 Dmsg0(29, "fsf_dev\n");
792 * If Fast forward space file is set, then we
793 * use MTFSF to forward space and MTIOCGET
794 * to get the file position. We assume that
795 * the SCSI driver will ensure that we do not
796 * forward space over the end of data mark.
798 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_FASTFSF)) {
799 mt_com.mt_op = MTFSF;
800 mt_com.mt_count = num;
801 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
802 if (stat < 0 || ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
803 dev->state |= ST_EOT;
804 Dmsg0(200, "Set ST_EOT\n");
805 clrerror_dev(dev, MTFSF);
806 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
807 dev->dev_name, strerror(dev->dev_errno));
808 Dmsg1(200, "%s", dev->errmsg);
811 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
812 dev->file = mt_stat.mt_fileno;
813 dev->state |= ST_EOF; /* just read EOF */
818 * Here if CAP_FSF is set, and virtually all drives
819 * these days support it, we read a record, then forward
820 * space one file. Using this procedure, which is slow,
821 * is the only way we can be sure that we don't read
822 * two consecutive EOF marks, which means End of Data.
824 } else if (dev_cap(dev, CAP_FSF)) {
827 Dmsg0(200, "FSF has cap_fsf\n");
828 if (dev->max_block_size == 0) {
829 rbuf_len = DEFAULT_BLOCK_SIZE;
831 rbuf_len = dev->max_block_size;
833 rbuf = get_memory(rbuf_len);
834 mt_com.mt_op = MTFSF;
836 while (num-- && !(dev->state & ST_EOT)) {
837 Dmsg0(200, "Doing read before fsf\n");
838 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
839 if (errno == ENOMEM) { /* tape record exceeds buf len */
840 stat = rbuf_len; /* This is OK */
842 dev->state |= ST_EOT;
843 clrerror_dev(dev, -1);
844 Dmsg2(200, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
845 strerror(dev->dev_errno));
846 Mmsg2(&dev->errmsg, _("read error on %s. ERR=%s.\n"),
847 dev->dev_name, strerror(dev->dev_errno));
848 Dmsg1(200, "%s", dev->errmsg);
852 if (stat == 0) { /* EOF */
854 Dmsg1(200, "End of File mark from read. File=%d\n", dev->file+1);
855 /* Two reads of zero means end of tape */
856 if (dev->state & ST_EOF) {
857 dev->state |= ST_EOT;
858 Dmsg0(200, "Set ST_EOT\n");
861 dev->state |= ST_EOF;
866 } else { /* Got data */
867 dev->state &= ~(ST_EOF|ST_EOT);
870 Dmsg0(200, "Doing MTFSF\n");
871 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
872 if (stat < 0) { /* error => EOT */
873 dev->state |= ST_EOT;
874 Dmsg0(200, "Set ST_EOT\n");
875 clrerror_dev(dev, MTFSF);
876 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
877 dev->dev_name, strerror(dev->dev_errno));
878 Dmsg0(200, "Got < 0 for MTFSF\n");
879 Dmsg1(200, "%s", dev->errmsg);
881 dev->state |= ST_EOF; /* just read EOF */
889 * No FSF, so use FSR to simulate it
892 Dmsg0(200, "Doing FSR for FSF\n");
893 while (num-- && !(dev->state & ST_EOT)) {
894 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
896 if (dev->state & ST_EOT) {
898 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
905 Dmsg1(200, "Return %d from FSF\n", stat);
906 if (dev->state & ST_EOF)
907 Dmsg0(200, "ST_EOF set on exit FSF\n");
908 if (dev->state & ST_EOT)
909 Dmsg0(200, "ST_EOT set on exit FSF\n");
910 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
911 return stat == 0 ? 1 : 0;
915 * Backward space a file
916 * Returns: 0 on failure
920 bsf_dev(DEVICE *dev, int num)
926 dev->dev_errno = EBADF;
927 Mmsg0(&dev->errmsg, _("Bad call to bsf_dev. Archive device not open\n"));
928 Emsg0(M_FATAL, 0, dev->errmsg);
932 if (!(dev_state(dev, ST_TAPE))) {
933 Mmsg1(&dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
937 Dmsg0(29, "bsf_dev\n");
938 dev->state &= ~(ST_EOT|ST_EOF);
941 mt_com.mt_op = MTBSF;
942 mt_com.mt_count = num;
943 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
945 clrerror_dev(dev, MTBSF);
946 Mmsg2(&dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
947 dev->dev_name, strerror(dev->dev_errno));
950 return stat == 0 ? 1 : 0;
955 * Foward space a record
956 * Returns: 0 on failure
960 fsr_dev(DEVICE *dev, int num)
966 dev->dev_errno = EBADF;
967 Mmsg0(&dev->errmsg, _("Bad call to fsr_dev. Archive not open\n"));
968 Emsg0(M_FATAL, 0, dev->errmsg);
972 if (!(dev_state(dev, ST_TAPE))) {
975 Dmsg0(29, "fsr_dev\n");
976 mt_com.mt_op = MTFSR;
977 mt_com.mt_count = num;
978 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
980 dev->state &= ~ST_EOF;
981 dev->block_num += num;
983 struct mtget mt_stat;
984 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 && mt_stat.mt_fileno >= 0) {
985 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", dev->file,
986 dev->block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
987 dev->file = mt_stat.mt_fileno;
988 dev->block_num = mt_stat.mt_blkno;
990 if (dev->state & ST_EOF) {
991 dev->state |= ST_EOT;
993 dev->state |= ST_EOF; /* assume EOF */
999 clrerror_dev(dev, MTFSR);
1000 Mmsg2(&dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
1001 dev->dev_name, strerror(dev->dev_errno));
1003 update_pos_dev(dev);
1004 return stat == 0 ? 1 : 0;
1008 * Backward space a record
1009 * Returns: 0 on failure
1013 bsr_dev(DEVICE *dev, int num)
1019 dev->dev_errno = EBADF;
1020 Mmsg0(&dev->errmsg, _("Bad call to bsr_dev. Archive not open\n"));
1021 Emsg0(M_FATAL, 0, dev->errmsg);
1025 if (!(dev->state & ST_TAPE)) {
1029 if (!dev_cap(dev, CAP_BSR)) {
1030 Mmsg1(&dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"),
1035 Dmsg0(29, "bsr_dev\n");
1036 dev->block_num -= num;
1037 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1038 mt_com.mt_op = MTBSR;
1039 mt_com.mt_count = num;
1040 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1042 clrerror_dev(dev, MTBSR);
1043 Mmsg2(&dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1044 dev->dev_name, strerror(dev->dev_errno));
1046 update_pos_dev(dev);
1047 return stat == 0 ? 1 : 0;
1051 * Reposition the device to file, block
1052 * Returns: 0 on failure
1056 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1059 dev->dev_errno = EBADF;
1060 Mmsg0(&dev->errmsg, _("Bad call to reposition_dev. Archive not open\n"));
1061 Emsg0(M_FATAL, 0, dev->errmsg);
1065 if (!(dev_state(dev, ST_TAPE))) {
1066 off_t pos = (((off_t)file)<<32) + block;
1067 Dmsg1(100, "===== lseek to %d\n", (int)pos);
1068 if (lseek(dev->fd, pos, SEEK_SET) == (off_t)-1) {
1069 dev->dev_errno = errno;
1070 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
1071 dev->dev_name, strerror(dev->dev_errno));
1075 dev->block_num = block;
1076 dev->file_addr = pos;
1079 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1080 dev->file, dev->block_num, file, block);
1081 if (file < dev->file) {
1082 Dmsg0(100, "Rewind_dev\n");
1083 if (!rewind_dev(dev)) {
1087 if (file > dev->file) {
1088 Dmsg1(100, "fsf %d\n", file-dev->file);
1089 if (!fsf_dev(dev, file-dev->file)) {
1093 if (block < dev->block_num) {
1097 if (block > dev->block_num) {
1098 /* Ignore errors as Bacula can read to the correct block */
1099 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1100 fsr_dev(dev, block-dev->block_num);
1108 * Write an end of file on the device
1109 * Returns: 0 on success
1110 * non-zero on failure
1113 weof_dev(DEVICE *dev, int num)
1119 dev->dev_errno = EBADF;
1120 Mmsg0(&dev->errmsg, _("Bad call to weof_dev. Archive drive not open\n"));
1121 Emsg0(M_FATAL, 0, dev->errmsg);
1125 if (!(dev_state(dev, ST_TAPE))) {
1128 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1130 Dmsg0(29, "weof_dev\n");
1131 mt_com.mt_op = MTWEOF;
1132 mt_com.mt_count = num;
1133 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1138 clrerror_dev(dev, MTWEOF);
1140 Mmsg2(&dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1141 dev->dev_name, strerror(dev->dev_errno));
1148 * Return string message with last error in English
1149 * Be careful not to call this routine from within dev.c
1150 * while editing an Mmsg(&) or you will end up in a recursive
1151 * loop creating a Segmentation Violation.
1154 strerror_dev(DEVICE *dev)
1161 * If implemented in system, clear the tape
1165 clrerror_dev(DEVICE *dev, int func)
1169 dev->dev_errno = errno; /* save errno */
1171 dev->VolCatInfo.VolCatErrors++;
1174 if (!(dev->state & ST_TAPE)) {
1177 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1180 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1184 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1189 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1194 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1198 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1202 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1206 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1213 dev->dev_errno = ENOSYS;
1214 Mmsg1(&dev->errmsg, _("This device does not support %s.\n"), msg);
1215 Emsg0(M_ERROR, 0, dev->errmsg);
1218 /* Found on Linux */
1222 mt_com.mt_op = MTIOCLRERR;
1223 mt_com.mt_count = 1;
1224 /* Clear any error condition on the tape */
1225 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1226 Dmsg0(200, "Did MTIOCLRERR\n");
1230 /* Typically on FreeBSD */
1233 /* Read and clear SCSI error status */
1234 union mterrstat mt_errstat;
1235 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1236 strerror(dev->dev_errno));
1237 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1243 * Flush buffer contents
1246 int flush_dev(DEVICE *dev)
1251 static void do_close(DEVICE *dev)
1254 Dmsg1(29, "really close_dev %s\n", dev->dev_name);
1258 /* Clean up device packet so it can be reused */
1260 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1261 dev->file = dev->block_num = 0;
1263 dev->EndFile = dev->EndBlock = 0;
1264 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1265 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1267 stop_thread_timer(dev->tid);
1277 close_dev(DEVICE *dev)
1280 Mmsg0(&dev->errmsg, _("Bad call to close_dev. Archive not open\n"));
1281 Emsg0(M_FATAL, 0, dev->errmsg);
1284 if (dev->fd >= 0 && dev->use_count == 1) {
1286 } else if (dev->use_count > 0) {
1291 ASSERT(dev->use_count >= 0);
1296 * Used when unmounting the device, ignore use_count
1298 void force_close_dev(DEVICE *dev)
1301 Mmsg0(&dev->errmsg, _("Bad call to force_close_dev. Archive not open\n"));
1302 Emsg0(M_FATAL, 0, dev->errmsg);
1305 Dmsg1(29, "Force close_dev %s\n", dev->dev_name);
1309 ASSERT(dev->use_count >= 0);
1313 int truncate_dev(DEVICE *dev)
1315 if (dev->state & ST_TAPE) {
1318 if (ftruncate(dev->fd, 0) != 0) {
1319 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), strerror(errno));
1326 dev_is_tape(DEVICE *dev)
1328 return (dev->state & ST_TAPE) ? 1 : 0;
1333 * return 1 if the device is read for write, and 0 otherwise
1334 * This is meant for checking at the end of a job to see
1335 * if we still have a tape (perhaps not if at end of tape
1336 * and the job is canceled).
1339 dev_can_write(DEVICE *dev)
1341 if ((dev->state & ST_OPENED) && (dev->state & ST_APPEND) &&
1342 (dev->state & ST_LABEL) && !(dev->state & ST_WEOT)) {
1350 dev_name(DEVICE *dev)
1352 return dev->dev_name;
1356 dev_vol_name(DEVICE *dev)
1358 return dev->VolCatInfo.VolCatName;
1361 uint32_t dev_block(DEVICE *dev)
1363 update_pos_dev(dev);
1364 return dev->block_num;
1367 uint32_t dev_file(DEVICE *dev)
1369 update_pos_dev(dev);
1374 * Free memory allocated for the device
1377 term_dev(DEVICE *dev)
1380 dev->dev_errno = EBADF;
1381 Mmsg0(&dev->errmsg, _("Bad call to term_dev. Archive not open\n"));
1382 Emsg0(M_FATAL, 0, dev->errmsg);
1386 Dmsg0(29, "term_dev\n");
1387 if (dev->dev_name) {
1388 free_memory(dev->dev_name);
1389 dev->dev_name = NULL;
1392 free_pool_memory(dev->errmsg);
1395 pthread_mutex_destroy(&dev->mutex);
1396 pthread_cond_destroy(&dev->wait);
1397 pthread_cond_destroy(&dev->wait_next_vol);
1398 pthread_mutex_destroy(&dev->spool_mutex);
1399 if (dev->attached_dcrs) {
1400 delete dev->attached_dcrs;
1401 dev->attached_dcrs = NULL;
1403 if (dev->state & ST_MALLOC) {
1404 free_pool_memory((POOLMEM *)dev);
1409 * We attach a jcr to the device so that when
1410 * the Volume is full during writing, a
1411 * JobMedia record will be created for this
1414 void attach_jcr_to_device(DEVICE *dev, JCR *jcr)
1416 jcr->prev_dev = (JCR *)NULL;
1417 jcr->next_dev = dev->attached_jcrs;
1418 if (dev->attached_jcrs) {
1419 dev->attached_jcrs->prev_dev = jcr;
1421 dev->attached_jcrs = jcr;
1422 Dmsg1(100, "Attached Job %s\n", jcr->Job);
1425 void detach_jcr_from_device(DEVICE *dev, JCR *jcr)
1427 if (!jcr->prev_dev) {
1428 dev->attached_jcrs = jcr->next_dev;
1430 jcr->prev_dev->next_dev = jcr->next_dev;
1432 if (jcr->next_dev) {
1433 jcr->next_dev->prev_dev = jcr->prev_dev;
1435 jcr->next_dev = jcr->prev_dev = NULL;
1436 Dmsg1(100, "Detached Job %s\n", jcr->Job);
1439 JCR *next_attached_jcr(DEVICE *dev, JCR *jcr)
1441 if (jcr == (JCR *)NULL) {
1442 return dev->attached_jcrs;
1444 return jcr->next_dev;
1448 * This routine initializes the device wait timers
1450 void init_dev_wait_timers(DEVICE *dev)
1452 /* ******FIXME******* put these on config variables */
1453 dev->min_wait = 60 * 60;
1454 dev->max_wait = 24 * 60 * 60;
1455 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1456 dev->wait_sec = dev->min_wait;
1457 dev->rem_wait_sec = dev->wait_sec;
1460 dev->BadVolName[0] = 0;
1464 * Returns: true if time doubled
1465 * false if max time expired
1467 bool double_dev_wait_time(DEVICE *dev)
1469 dev->wait_sec *= 2; /* double wait time */
1470 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1471 dev->wait_sec = dev->max_wait;
1474 dev->rem_wait_sec = dev->wait_sec;
1475 if (dev->num_wait >= dev->max_num_wait) {