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) 2000-2005 Kern Sibbald
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 /* Functions in dvd.c */
84 void get_filename(DEVICE *dev, char *VolName, POOL_MEM& archive_name);
85 int mount_dev(DEVICE* dev, int timeout);
86 int unmount_dev(DEVICE *dev, int timeout);
87 void update_free_space_dev(DEVICE* dev);
90 /* Forward referenced functions */
91 void set_os_device_parameters(DEVICE *dev);
92 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat);
95 * Allocate and initialize the DEVICE structure
96 * Note, if dev is non-NULL, it is already allocated,
97 * thus we neither allocate it nor free it. This allows
98 * the caller to put the packet in shared memory.
100 * Note, for a tape, the device->device_name is the device name
101 * (e.g. /dev/nst0), and for a file, the device name
102 * is the directory in which the file will be placed.
106 init_dev(JCR *jcr, DEVICE *dev, DEVRES *device)
113 /* Check that device is available */
114 if (stat(device->device_name, &statp) < 0) {
117 dev->dev_errno = errno;
119 Jmsg2(jcr, M_ERROR, 0, _("Unable to stat device %s: ERR=%s\n"),
120 device->device_name, be.strerror());
127 if (S_ISDIR(statp.st_mode)) {
129 } else if (S_ISCHR(statp.st_mode)) {
131 } else if (S_ISFIFO(statp.st_mode)) {
135 dev->dev_errno = ENODEV;
137 Jmsg2(jcr, M_ERROR, 0, _("%s is an unknown device type. Must be tape or directory. st_mode=%x\n"),
138 device->device_name, statp.st_mode);
142 dev = (DEVICE *)get_memory(sizeof(DEVICE));
143 memset(dev, 0, sizeof(DEVICE));
144 dev->state = ST_MALLOC;
146 memset(dev, 0, sizeof(DEVICE));
149 /* Copy user supplied device parameters from Resource */
150 dev->dev_name = get_memory(strlen(device->device_name)+1);
151 pm_strcpy(dev->dev_name, device->device_name);
152 dev->capabilities = device->cap_bits;
153 dev->min_block_size = device->min_block_size;
154 dev->max_block_size = device->max_block_size;
155 dev->max_volume_size = device->max_volume_size;
156 dev->max_file_size = device->max_file_size;
157 dev->volume_capacity = device->volume_capacity;
158 dev->max_rewind_wait = device->max_rewind_wait;
159 dev->max_open_wait = device->max_open_wait;
160 dev->max_open_vols = device->max_open_vols;
161 dev->vol_poll_interval = device->vol_poll_interval;
162 dev->max_spool_size = device->max_spool_size;
163 dev->drive_index = device->drive_index;
164 dev->autoselect = device->autoselect;
165 if (tape) { /* No parts on tapes */
166 dev->max_part_size = 0;
169 dev->max_part_size = device->max_part_size;
172 if (dev->vol_poll_interval && dev->vol_poll_interval < 60) {
173 dev->vol_poll_interval = 60;
175 dev->device = device;
178 dev->state |= ST_TAPE;
180 dev->state |= ST_FIFO;
181 dev->capabilities |= CAP_STREAM; /* set stream device */
183 dev->state |= ST_FILE;
186 /* If the device requires mount :
187 * - Check that the mount point is available
188 * - Check that (un)mount commands are defined
190 if (dev->is_file() && device->cap_bits & CAP_REQMOUNT) {
191 if (stat(device->mount_point, &statp) < 0) {
193 dev->dev_errno = errno;
194 Jmsg2(jcr, M_ERROR, 0, _("Unable to stat mount point %s: ERR=%s\n"),
195 device->mount_point, be.strerror());
198 if (!device->mount_command || !device->unmount_command) {
199 Jmsg0(jcr, M_ERROR_TERM, 0, _("Mount and unmount commands must defined for a device which requires mount.\n"));
201 if (!device->write_part_command) {
202 Jmsg0(jcr, M_ERROR_TERM, 0, _("Write part command must be defined for a device which requires mount.\n"));
204 dev->state |= ST_DVD;
207 if (dev->max_block_size > 1000000) {
208 Jmsg3(jcr, M_ERROR, 0, _("Block size %u on device %s is too large, using default %u\n"),
209 dev->max_block_size, dev->dev_name, DEFAULT_BLOCK_SIZE);
210 dev->max_block_size = 0;
212 if (dev->max_block_size % TAPE_BSIZE != 0) {
213 Jmsg2(jcr, M_WARNING, 0, _("Max block size %u not multiple of device %s block size.\n"),
214 dev->max_block_size, dev->dev_name);
217 dev->errmsg = get_pool_memory(PM_EMSG);
220 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
222 dev->dev_errno = errstat;
223 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
224 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
226 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
228 dev->dev_errno = errstat;
229 Mmsg1(dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), be.strerror(errstat));
230 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
232 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
234 dev->dev_errno = errstat;
235 Mmsg1(dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), be.strerror(errstat));
236 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
238 if ((errstat = pthread_mutex_init(&dev->spool_mutex, NULL)) != 0) {
240 dev->dev_errno = errstat;
241 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
242 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
244 if ((errstat = rwl_init(&dev->lock)) != 0) {
246 dev->dev_errno = errstat;
247 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
248 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
252 dev->attached_dcrs = New(dlist(dcr, &dcr->dev_link));
253 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
259 * Open the device with the operating system and
260 * initialize buffer pointers.
262 * Returns: -1 on error
265 * Note, for a tape, the VolName is the name we give to the
266 * volume (not really used here), but for a file, the
267 * VolName represents the name of the file to be created/opened.
268 * In the case of a file, the full name is the device name
269 * (archive_name) with the VolName concatenated.
272 open_dev(DEVICE *dev, char *VolName, int mode)
274 if (dev->is_open()) {
276 * *****FIXME***** how to handle two threads wanting
277 * different volumes mounted???? E.g. one is waiting
278 * for the next volume to be mounted, and a new job
279 * starts and snatches up the device.
281 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
285 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
286 dev->dev_name, dev->use_count);
287 Emsg1(M_WARNING, 0, "%s", dev->errmsg);
291 bstrncpy(dev->VolCatInfo.VolCatName, VolName, sizeof(dev->VolCatInfo.VolCatName));
294 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
295 dev->dev_name, dev->VolCatInfo.VolCatName);
296 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
297 dev->label_type = B_BACULA_LABEL;
298 if (dev->is_tape() || dev->is_fifo()) {
301 Dmsg0(29, "open_dev: device is tape\n");
302 if (mode == OPEN_READ_WRITE) {
303 dev->mode = O_RDWR | O_BINARY;
304 } else if (mode == OPEN_READ_ONLY) {
305 dev->mode = O_RDONLY | O_BINARY;
306 } else if (mode == OPEN_WRITE_ONLY) {
307 dev->mode = O_WRONLY | O_BINARY;
309 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
311 timeout = dev->max_open_wait;
313 if (dev->is_fifo() && timeout) {
315 dev->tid = start_thread_timer(pthread_self(), timeout);
317 /* If busy retry each second for max_open_wait seconds */
318 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
320 if (errno == EINTR || errno == EAGAIN) {
323 if (errno == EBUSY && timeout-- > 0) {
324 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->dev_name, be.strerror());
328 dev->dev_errno = errno;
329 Mmsg2(&dev->errmsg, _("stored: unable to open device %s: ERR=%s\n"),
330 dev->dev_name, be.strerror());
331 /* Stop any open timer we set */
333 stop_thread_timer(dev->tid);
336 Emsg0(M_FATAL, 0, dev->errmsg);
341 dev->state |= ST_OPENED;
343 update_pos_dev(dev); /* update position */
344 set_os_device_parameters(dev); /* do system dependent stuff */
346 /* Stop any open() timer we started */
348 stop_thread_timer(dev->tid);
351 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
353 POOL_MEM archive_name(PM_FNAME);
354 struct stat filestat;
356 * Handle opening of File Archive (not a tape)
358 if (dev->part == 0) {
363 /* if num_parts has not been set, but VolCatInfo is available, copy
364 * it from the VolCatInfo.VolCatParts */
365 if (dev->num_parts < dev->VolCatInfo.VolCatParts) {
366 dev->num_parts = dev->VolCatInfo.VolCatParts;
369 if (VolName == NULL || *VolName == 0) {
370 Mmsg(dev->errmsg, _("Could not open file device %s. No Volume name given.\n"),
374 get_filename(dev, VolName, archive_name);
376 if (mount_dev(dev, 1) < 0) {
377 Mmsg(dev->errmsg, _("Could not mount archive device %s.\n"),
379 Emsg0(M_FATAL, 0, dev->errmsg);
384 Dmsg2(29, "open_dev: device is disk %s (mode:%d)\n", archive_name.c_str(), mode);
385 dev->openmode = mode;
388 * If we are not trying to access the last part, set mode to
389 * OPEN_READ_ONLY as writing would be an error.
391 if (dev->part < dev->num_parts) {
392 mode = OPEN_READ_ONLY;
395 if (mode == OPEN_READ_WRITE) {
396 dev->mode = O_CREAT | O_RDWR | O_BINARY;
397 } else if (mode == OPEN_READ_ONLY) {
398 dev->mode = O_RDONLY | O_BINARY;
399 } else if (mode == OPEN_WRITE_ONLY) {
400 dev->mode = O_WRONLY | O_BINARY;
402 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
404 /* If creating file, give 0640 permissions */
405 if ((dev->fd = open(archive_name.c_str(), dev->mode, 0640)) < 0) {
407 dev->dev_errno = errno;
408 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name.c_str(), be.strerror());
409 Emsg0(M_FATAL, 0, dev->errmsg);
412 dev->state |= ST_OPENED;
414 update_pos_dev(dev); /* update position */
415 if (fstat(dev->fd, &filestat) < 0) {
417 dev->dev_errno = errno;
418 Mmsg2(&dev->errmsg, _("Could not fstat: %s, ERR=%s\n"), archive_name.c_str(), be.strerror());
419 Emsg0(M_FATAL, 0, dev->errmsg);
421 dev->part_size = filestat.st_size;
424 Dmsg4(29, "open_dev: disk fd=%d opened, part=%d/%d, part_size=%u\n", dev->fd, dev->part, dev->num_parts, dev->part_size);
425 if (dev->is_dvd() && (dev->mode != OPEN_READ_ONLY) &&
426 (dev->free_space_errno == 0 || dev->num_parts == dev->part)) {
427 update_free_space_dev(dev);
435 bool _rewind_dev(char *file, int line, DEVICE *dev)
437 Dmsg2(100, "rewind_dev called from %s:%d\n", file, line);
438 return rewind_dev(dev);
444 * Returns: true on success
447 bool rewind_dev(DEVICE *dev)
452 Dmsg1(29, "rewind_dev %s\n", dev->dev_name);
454 dev->dev_errno = EBADF;
455 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
457 Emsg0(M_ABORT, 0, dev->errmsg);
460 dev->state &= ~(ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
461 dev->block_num = dev->file = 0;
464 if (dev->is_tape()) {
465 mt_com.mt_op = MTREW;
467 /* If we get an I/O error on rewind, it is probably because
468 * the drive is actually busy. We loop for (about 5 minutes)
469 * retrying every 5 seconds.
471 for (i=dev->max_rewind_wait; ; i -= 5) {
472 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
474 clrerror_dev(dev, MTREW);
475 if (i == dev->max_rewind_wait) {
476 Dmsg1(200, "Rewind error, %s. retrying ...\n", be.strerror());
478 if (dev->dev_errno == EIO && i > 0) {
479 Dmsg0(200, "Sleeping 5 seconds.\n");
483 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
484 dev->dev_name, be.strerror());
489 } else if (dev->is_file()) {
490 if (lseek_dev(dev, (off_t)0, SEEK_SET) < 0) {
492 dev->dev_errno = errno;
493 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
494 dev->dev_name, be.strerror());
502 * Called to indicate that we have just read an
503 * EOF from the device.
505 void DEVICE::set_eof()
515 * Called to indicate we are now at the end of the tape, and
516 * writing is not possible.
518 void DEVICE::set_eot()
520 state |= (ST_EOF|ST_EOT|ST_WEOT);
521 state &= ~ST_APPEND; /* make tape read-only */
525 * Position device to end of medium (end of data)
526 * Returns: 1 on succes
533 struct mtget mt_stat;
537 Dmsg0(29, "eod_dev\n");
541 dev->state &= ~(ST_EOF); /* remove EOF flags */
542 dev->block_num = dev->file = 0;
545 if (dev->state & (ST_FIFO | ST_PROG)) {
548 if (!dev->is_tape()) {
549 pos = lseek_dev(dev, (off_t)0, SEEK_END);
550 // Dmsg1(100, "====== Seek to %lld\n", pos);
553 dev->state |= ST_EOT;
556 dev->dev_errno = errno;
558 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
559 dev->dev_name, be.strerror());
563 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
564 Dmsg0(100,"Using FAST FSF for EOM\n");
565 /* If unknown position, rewind */
566 if (!dev_get_os_pos(dev, &mt_stat)) {
567 if (!rewind_dev(dev)) {
571 mt_com.mt_op = MTFSF;
573 * ***FIXME*** fix code to handle case that INT16_MAX is
576 mt_com.mt_count = INT16_MAX; /* use big positive number */
577 if (mt_com.mt_count < 0) {
578 mt_com.mt_count = INT16_MAX; /* brain damaged system */
582 if (dev_cap(dev, CAP_MTIOCGET) && (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM))) {
583 if (dev_cap(dev, CAP_EOM)) {
584 Dmsg0(100,"Using EOM for EOM\n");
585 mt_com.mt_op = MTEOM;
589 if ((stat=ioctl(dev->fd, MTIOCTOP, (char *)&mt_com)) < 0) {
591 clrerror_dev(dev, mt_com.mt_op);
592 Dmsg1(50, "ioctl error: %s\n", be.strerror());
594 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
595 dev->dev_name, be.strerror());
599 if (!dev_get_os_pos(dev, &mt_stat)) {
601 clrerror_dev(dev, -1);
602 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
603 dev->dev_name, be.strerror());
606 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
608 dev->file = mt_stat.mt_fileno;
615 * Rewind then use FSF until EOT reached
617 if (!rewind_dev(dev)) {
621 * Move file by file to the end of the tape
624 for (file_num=dev->file; !dev->at_eot(); file_num++) {
625 Dmsg0(200, "eod_dev: doing fsf 1\n");
626 if (!fsf_dev(dev, 1)) {
627 Dmsg0(200, "fsf_dev error.\n");
631 * Avoid infinite loop. ***FIXME*** possibly add code
632 * to set EOD or to turn off CAP_FASTFSF if on.
634 if (file_num == (int)dev->file) {
635 struct mtget mt_stat;
636 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
637 if (dev_get_os_pos(dev, &mt_stat)) {
638 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
640 dev->file = mt_stat.mt_fileno;
643 break; /* we are not progressing, bail out */
648 * Some drivers leave us after second EOF when doing
649 * MTEOM, so we must backup so that appending overwrites
652 if (dev_cap(dev, CAP_BSFATEOM)) {
653 struct mtget mt_stat;
654 /* Backup over EOF */
655 stat = bsf_dev(dev, 1);
656 /* If BSF worked and fileno is known (not -1), set file */
657 if (dev_get_os_pos(dev, &mt_stat)) {
658 Dmsg2(100, "BSFATEOF adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
659 dev->file = mt_stat.mt_fileno;
661 dev->file++; /* wing it -- not correct on all OSes */
664 update_pos_dev(dev); /* update position */
667 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
672 * Set the position of the device -- only for files
673 * For other devices, there is no generic way to do it.
674 * Returns: true on succes
677 bool update_pos_dev(DEVICE *dev)
683 dev->dev_errno = EBADF;
684 Mmsg0(&dev->errmsg, _("Bad device call. Archive not open\n"));
685 Emsg0(M_FATAL, 0, dev->errmsg);
689 /* Find out where we are */
690 if (dev->is_file()) {
693 pos = lseek_dev(dev, (off_t)0, SEEK_CUR);
696 dev->dev_errno = errno;
697 Pmsg1(000, "Seek error: ERR=%s\n", be.strerror());
698 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
699 dev->dev_name, be.strerror());
702 dev->file_addr = pos;
710 * Return the status of the device. This was meant
711 * to be a generic routine. Unfortunately, it doesn't
712 * seem possible (at least I do not know how to do it
713 * currently), which means that for the moment, this
714 * routine has very little value.
718 uint32_t status_dev(DEVICE *dev)
720 struct mtget mt_stat;
723 if (dev->state & (ST_EOT | ST_WEOT)) {
727 if (dev->state & ST_EOF) {
731 if (dev->is_tape()) {
733 Dmsg0(-20," Bacula status:");
734 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
735 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
737 dev->dev_errno = errno;
738 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
739 dev->dev_name, be.strerror());
742 Dmsg0(-20, " Device status:");
744 #if defined(HAVE_LINUX_OS)
745 if (GMT_EOF(mt_stat.mt_gstat)) {
749 if (GMT_BOT(mt_stat.mt_gstat)) {
753 if (GMT_EOT(mt_stat.mt_gstat)) {
757 if (GMT_SM(mt_stat.mt_gstat)) {
761 if (GMT_EOD(mt_stat.mt_gstat)) {
765 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
767 Dmsg0(-20, " WR_PROT");
769 if (GMT_ONLINE(mt_stat.mt_gstat)) {
771 Dmsg0(-20, " ONLINE");
773 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
775 Dmsg0(-20, " DR_OPEN");
777 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
778 stat |= BMT_IM_REP_EN;
779 Dmsg0(-20, " IM_REP_EN");
781 #endif /* !SunOS && !OSF */
782 if (dev_cap(dev, CAP_MTIOCGET)) {
783 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
785 Dmsg2(-20, " file=%d block=%d\n", -1, -1);
788 stat |= BMT_ONLINE | BMT_BOT;
795 * Load medium in device
796 * Returns: true on success
799 bool load_dev(DEVICE *dev)
806 dev->dev_errno = EBADF;
807 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
808 Emsg0(M_FATAL, 0, dev->errmsg);
811 if (!(dev->is_tape())) {
815 Dmsg0(200, "stored: MTLOAD command not available\n");
817 dev->dev_errno = ENOTTY; /* function not available */
818 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
819 dev->dev_name, be.strerror());
823 dev->block_num = dev->file = 0;
826 mt_com.mt_op = MTLOAD;
828 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
830 dev->dev_errno = errno;
831 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
832 dev->dev_name, be.strerror());
840 * Rewind device and put it offline
841 * Returns: true on success
844 bool offline_dev(DEVICE *dev)
849 dev->dev_errno = EBADF;
850 Mmsg0(&dev->errmsg, _("Bad call to offline_dev. Archive not open\n"));
851 Emsg0(M_FATAL, 0, dev->errmsg);
854 if (!(dev->is_tape())) {
858 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
859 dev->block_num = dev->file = 0;
864 mt_com.mt_op = MTUNLOCK;
866 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
868 mt_com.mt_op = MTOFFL;
870 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
872 dev->dev_errno = errno;
873 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
874 dev->dev_name, be.strerror());
877 Dmsg1(100, "Offlined device %s\n", dev->dev_name);
881 bool offline_or_rewind_dev(DEVICE *dev)
886 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
887 return offline_dev(dev);
890 * Note, this rewind probably should not be here (it wasn't
891 * in prior versions of Bacula), but on FreeBSD, this is
892 * needed in the case the tape was "frozen" due to an error
893 * such as backspacing after writing and EOF. If it is not
894 * done, all future references to the drive get and I/O error.
896 clrerror_dev(dev, MTREW);
897 return rewind_dev(dev);
902 * Foward space a file
903 * Returns: true on success
907 fsf_dev(DEVICE *dev, int num)
909 struct mtget mt_stat;
914 dev->dev_errno = EBADF;
915 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
916 Emsg0(M_FATAL, 0, dev->errmsg);
920 if (!dev->is_tape()) {
923 if (dev->state & ST_EOT) {
925 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
928 if (dev->state & ST_EOF) {
929 Dmsg0(200, "ST_EOF set on entry to FSF\n");
932 Dmsg0(100, "fsf_dev\n");
935 * If Fast forward space file is set, then we
936 * use MTFSF to forward space and MTIOCGET
937 * to get the file position. We assume that
938 * the SCSI driver will ensure that we do not
939 * forward space past the end of the medium.
941 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_MTIOCGET) && dev_cap(dev, CAP_FASTFSF)) {
942 mt_com.mt_op = MTFSF;
943 mt_com.mt_count = num;
944 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
945 if (stat < 0 || !dev_get_os_pos(dev, &mt_stat)) {
947 dev->state |= ST_EOT;
948 Dmsg0(200, "Set ST_EOT\n");
949 clrerror_dev(dev, MTFSF);
950 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
951 dev->dev_name, be.strerror());
952 Dmsg1(200, "%s", dev->errmsg);
955 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
957 dev->file = mt_stat.mt_fileno;
961 * Here if CAP_FSF is set, and virtually all drives
962 * these days support it, we read a record, then forward
963 * space one file. Using this procedure, which is slow,
964 * is the only way we can be sure that we don't read
965 * two consecutive EOF marks, which means End of Data.
967 } else if (dev_cap(dev, CAP_FSF)) {
970 Dmsg0(200, "FSF has cap_fsf\n");
971 if (dev->max_block_size == 0) {
972 rbuf_len = DEFAULT_BLOCK_SIZE;
974 rbuf_len = dev->max_block_size;
976 rbuf = get_memory(rbuf_len);
977 mt_com.mt_op = MTFSF;
979 while (num-- && !(dev->state & ST_EOT)) {
980 Dmsg0(100, "Doing read before fsf\n");
981 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
982 if (errno == ENOMEM) { /* tape record exceeds buf len */
983 stat = rbuf_len; /* This is OK */
986 dev->state |= ST_EOT;
987 clrerror_dev(dev, -1);
988 Dmsg2(100, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
990 Mmsg2(dev->errmsg, _("read error on %s. ERR=%s.\n"),
991 dev->dev_name, be.strerror());
992 Dmsg1(100, "%s", dev->errmsg);
996 if (stat == 0) { /* EOF */
998 Dmsg1(100, "End of File mark from read. File=%d\n", dev->file+1);
999 /* Two reads of zero means end of tape */
1000 if (dev->state & ST_EOF) {
1001 dev->state |= ST_EOT;
1002 Dmsg0(100, "Set ST_EOT\n");
1008 } else { /* Got data */
1009 dev->state &= ~(ST_EOF|ST_EOT);
1012 Dmsg0(100, "Doing MTFSF\n");
1013 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1014 if (stat < 0) { /* error => EOT */
1016 dev->state |= ST_EOT;
1017 Dmsg0(100, "Set ST_EOT\n");
1018 clrerror_dev(dev, MTFSF);
1019 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1020 dev->dev_name, be.strerror());
1021 Dmsg0(100, "Got < 0 for MTFSF\n");
1022 Dmsg1(100, "%s", dev->errmsg);
1030 * No FSF, so use FSR to simulate it
1033 Dmsg0(200, "Doing FSR for FSF\n");
1034 while (num-- && !(dev->state & ST_EOT)) {
1035 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
1037 if (dev->state & ST_EOT) {
1039 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
1045 update_pos_dev(dev);
1046 Dmsg1(200, "Return %d from FSF\n", stat);
1047 if (dev->state & ST_EOF)
1048 Dmsg0(200, "ST_EOF set on exit FSF\n");
1049 if (dev->state & ST_EOT)
1050 Dmsg0(200, "ST_EOT set on exit FSF\n");
1051 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
1056 * Backward space a file
1057 * Returns: false on failure
1061 bsf_dev(DEVICE *dev, int num)
1067 dev->dev_errno = EBADF;
1068 Mmsg0(dev->errmsg, _("Bad call to bsf_dev. Archive device not open\n"));
1069 Emsg0(M_FATAL, 0, dev->errmsg);
1073 if (!dev->is_tape()) {
1074 Mmsg1(dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
1078 Dmsg0(29, "bsf_dev\n");
1079 dev->state &= ~(ST_EOT|ST_EOF);
1083 mt_com.mt_op = MTBSF;
1084 mt_com.mt_count = num;
1085 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1088 clrerror_dev(dev, MTBSF);
1089 Mmsg2(dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
1090 dev->dev_name, be.strerror());
1092 update_pos_dev(dev);
1098 * Foward space a record
1099 * Returns: false on failure
1103 fsr_dev(DEVICE *dev, int num)
1109 dev->dev_errno = EBADF;
1110 Mmsg0(dev->errmsg, _("Bad call to fsr_dev. Archive not open\n"));
1111 Emsg0(M_FATAL, 0, dev->errmsg);
1115 if (!dev->is_tape()) {
1118 if (!dev_cap(dev, CAP_FSR)) {
1119 Mmsg1(dev->errmsg, _("ioctl MTFSR not permitted on %s.\n"), dev->dev_name);
1123 Dmsg1(29, "fsr_dev %d\n", num);
1124 mt_com.mt_op = MTFSR;
1125 mt_com.mt_count = num;
1126 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1128 dev->state &= ~ST_EOF;
1129 dev->block_num += num;
1132 struct mtget mt_stat;
1133 clrerror_dev(dev, MTFSR);
1134 Dmsg1(100, "FSF fail: ERR=%s\n", be.strerror());
1135 if (dev_get_os_pos(dev, &mt_stat)) {
1136 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", dev->file,
1137 dev->block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
1138 dev->file = mt_stat.mt_fileno;
1139 dev->block_num = mt_stat.mt_blkno;
1141 if (dev->state & ST_EOF) {
1142 dev->state |= ST_EOT;
1147 Mmsg2(dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
1148 dev->dev_name, be.strerror());
1150 update_pos_dev(dev);
1155 * Backward space a record
1156 * Returns: false on failure
1160 bsr_dev(DEVICE *dev, int num)
1166 dev->dev_errno = EBADF;
1167 Mmsg0(dev->errmsg, _("Bad call to bsr_dev. Archive not open\n"));
1168 Emsg0(M_FATAL, 0, dev->errmsg);
1172 if (!dev->is_tape()) {
1176 if (!dev_cap(dev, CAP_BSR)) {
1177 Mmsg1(dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"), dev->dev_name);
1181 Dmsg0(29, "bsr_dev\n");
1182 dev->block_num -= num;
1183 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1184 mt_com.mt_op = MTBSR;
1185 mt_com.mt_count = num;
1186 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1189 clrerror_dev(dev, MTBSR);
1190 Mmsg2(dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1191 dev->dev_name, be.strerror());
1193 update_pos_dev(dev);
1198 * Reposition the device to file, block
1199 * Returns: false on failure
1203 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1206 dev->dev_errno = EBADF;
1207 Mmsg0(dev->errmsg, _("Bad call to reposition_dev. Archive not open\n"));
1208 Emsg0(M_FATAL, 0, dev->errmsg);
1212 if (!dev->is_tape()) {
1213 off_t pos = (((off_t)file)<<32) + block;
1214 Dmsg1(100, "===== lseek_dev to %d\n", (int)pos);
1215 if (lseek_dev(dev, pos, SEEK_SET) == (off_t)-1) {
1217 dev->dev_errno = errno;
1218 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
1219 dev->dev_name, be.strerror());
1223 dev->block_num = block;
1224 dev->file_addr = pos;
1227 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1228 dev->file, dev->block_num, file, block);
1229 if (file < dev->file) {
1230 Dmsg0(100, "Rewind_dev\n");
1231 if (!rewind_dev(dev)) {
1235 if (file > dev->file) {
1236 Dmsg1(100, "fsf %d\n", file-dev->file);
1237 if (!fsf_dev(dev, file-dev->file)) {
1238 Dmsg1(100, "fsf failed! ERR=%s\n", strerror_dev(dev));
1241 Dmsg2(100, "wanted_file=%d at_file=%d\n", file, dev->file);
1243 if (block < dev->block_num) {
1244 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1245 Dmsg0(100, "bsf_dev 1\n");
1247 Dmsg0(100, "fsf_dev 1\n");
1249 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1251 if (dev_cap(dev, CAP_POSITIONBLOCKS) && block > dev->block_num) {
1252 /* Ignore errors as Bacula can read to the correct block */
1253 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1254 return fsr_dev(dev, block-dev->block_num);
1262 * Write an end of file on the device
1263 * Returns: 0 on success
1264 * non-zero on failure
1267 weof_dev(DEVICE *dev, int num)
1271 Dmsg0(29, "weof_dev\n");
1274 dev->dev_errno = EBADF;
1275 Mmsg0(dev->errmsg, _("Bad call to weof_dev. Archive drive not open\n"));
1276 Emsg0(M_FATAL, 0, dev->errmsg);
1281 if (!dev->is_tape()) {
1284 if (!dev->can_append()) {
1285 Mmsg0(dev->errmsg, _("Attempt to WEOF on non-appendable Volume\n"));
1286 Emsg0(M_FATAL, 0, dev->errmsg);
1290 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1291 mt_com.mt_op = MTWEOF;
1292 mt_com.mt_count = num;
1293 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1300 clrerror_dev(dev, MTWEOF);
1302 Mmsg2(dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1303 dev->dev_name, be.strerror());
1310 * Return string message with last error in English
1311 * Be careful not to call this routine from within dev.c
1312 * while editing an Mmsg() or you will end up in a recursive
1313 * loop creating a Segmentation Violation.
1316 strerror_dev(DEVICE *dev)
1323 * If implemented in system, clear the tape
1327 clrerror_dev(DEVICE *dev, int func)
1329 const char *msg = NULL;
1330 struct mtget mt_stat;
1333 dev->dev_errno = errno; /* save errno */
1335 dev->VolCatInfo.VolCatErrors++;
1338 if (!dev->is_tape()) {
1341 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1344 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1348 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1353 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1358 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1362 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1366 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1370 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1391 bsnprintf(buf, sizeof(buf), "unknown func code %d", func);
1396 dev->dev_errno = ENOSYS;
1397 Mmsg1(dev->errmsg, _("I/O function \"%s\" not supported on this device.\n"), msg);
1398 Emsg0(M_ERROR, 0, dev->errmsg);
1401 /* On some systems such as NetBSD, this clears all errors */
1402 ioctl(dev->fd, MTIOCGET, (char *)&mt_stat);
1404 /* Found on Linux */
1408 mt_com.mt_op = MTIOCLRERR;
1409 mt_com.mt_count = 1;
1410 /* Clear any error condition on the tape */
1411 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1412 Dmsg0(200, "Did MTIOCLRERR\n");
1416 /* Typically on FreeBSD */
1419 /* Read and clear SCSI error status */
1420 union mterrstat mt_errstat;
1421 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1422 strerror(dev->dev_errno));
1423 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1427 /* Clear Subsystem Exception OSF1 */
1431 mt_com.mt_op = MTCSE;
1432 mt_com.mt_count = 1;
1433 /* Clear any error condition on the tape */
1434 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1435 Dmsg0(200, "Did MTCSE\n");
1441 * Flush buffer contents
1444 int flush_dev(DEVICE *dev)
1449 static void do_close(DEVICE *dev)
1452 Dmsg1(29, "really close_dev %s\n", dev->dev_name);
1457 if (unmount_dev(dev, 1) < 0) {
1458 Dmsg1(0, "Cannot unmount device %s.\n", dev->dev_name);
1461 /* Remove the last part file if it is empty */
1462 if (dev->can_append() && (dev->num_parts > 0)) {
1464 POOL_MEM archive_name(PM_FNAME);
1465 dev->part = dev->num_parts;
1466 get_filename(dev, dev->VolCatInfo.VolCatName, archive_name);
1467 /* Check that the part file is empty */
1468 if ((stat(archive_name.c_str(), &statp) == 0) && (statp.st_size == 0)) {
1469 unlink(archive_name.c_str());
1473 /* Clean up device packet so it can be reused */
1475 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1476 dev->label_type = B_BACULA_LABEL;
1477 dev->file = dev->block_num = 0;
1482 dev->part_start = 0;
1483 dev->EndFile = dev->EndBlock = 0;
1484 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1485 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1487 stop_thread_timer(dev->tid);
1497 close_dev(DEVICE *dev)
1500 Mmsg0(&dev->errmsg, _("Bad call to close_dev. Archive not open\n"));
1501 Emsg0(M_FATAL, 0, dev->errmsg);
1504 /*if (dev->fd >= 0 && dev->use_count == 1) {*/
1505 /* No need to check if dev->fd >= 0: it is checked again
1506 * in do_close, and do_close MUST be called for volumes
1507 * splitted in parts, even if dev->fd == -1. */
1508 if (dev->use_count == 1) {
1510 } else if (dev->use_count > 0) {
1515 ASSERT(dev->use_count >= 0);
1520 * Used when unmounting the device, ignore use_count
1522 void force_close_dev(DEVICE *dev)
1525 Mmsg0(&dev->errmsg, _("Bad call to force_close_dev. Archive not open\n"));
1526 Emsg0(M_FATAL, 0, dev->errmsg);
1529 Dmsg1(29, "Force close_dev %s\n", dev->dev_name);
1533 ASSERT(dev->use_count >= 0);
1537 bool truncate_dev(DEVICE *dev)
1539 Dmsg1(100, "truncate_dev %s\n", dev->dev_name);
1540 if (dev->is_tape()) {
1541 return true; /* we don't really truncate tapes */
1542 /* maybe we should rewind and write and eof ???? */
1545 /* If there is more than one part, open the first one, and then truncate it. */
1546 if (dev->num_parts > 0) {
1548 dev->VolCatInfo.VolCatParts = 0;
1549 if (open_first_part(dev) < 0) {
1551 Mmsg1(&dev->errmsg, "Unable to truncate device, because I'm unable to open the first part. ERR=%s\n", be.strerror());
1555 if (ftruncate(dev->fd, 0) != 0) {
1557 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), be.strerror());
1564 dev_is_tape(DEVICE *dev)
1566 return dev->is_tape() ? true : false;
1571 * return 1 if the device is read for write, and 0 otherwise
1572 * This is meant for checking at the end of a job to see
1573 * if we still have a tape (perhaps not if at end of tape
1574 * and the job is canceled).
1577 dev_can_write(DEVICE *dev)
1579 if (dev->is_open() && dev->can_append() &&
1580 dev->is_labeled() && !(dev->state & ST_WEOT)) {
1588 dev_name(DEVICE *dev)
1590 return dev->dev_name;
1594 dev_vol_name(DEVICE *dev)
1596 return dev->VolCatInfo.VolCatName;
1599 uint32_t dev_block(DEVICE *dev)
1601 update_pos_dev(dev);
1602 return dev->block_num;
1605 uint32_t dev_file(DEVICE *dev)
1607 update_pos_dev(dev);
1612 * Free memory allocated for the device
1615 term_dev(DEVICE *dev)
1618 dev->dev_errno = EBADF;
1619 Mmsg0(&dev->errmsg, _("Bad call to term_dev. Archive not open\n"));
1620 Emsg0(M_FATAL, 0, dev->errmsg);
1624 Dmsg0(29, "term_dev\n");
1625 if (dev->dev_name) {
1626 free_memory(dev->dev_name);
1627 dev->dev_name = NULL;
1630 free_pool_memory(dev->errmsg);
1633 pthread_mutex_destroy(&dev->mutex);
1634 pthread_cond_destroy(&dev->wait);
1635 pthread_cond_destroy(&dev->wait_next_vol);
1636 pthread_mutex_destroy(&dev->spool_mutex);
1637 rwl_destroy(&dev->lock);
1638 if (dev->attached_dcrs) {
1639 delete dev->attached_dcrs;
1640 dev->attached_dcrs = NULL;
1642 if (dev->state & ST_MALLOC) {
1643 free_pool_memory((POOLMEM *)dev);
1648 * This routine initializes the device wait timers
1650 void init_dev_wait_timers(DEVICE *dev)
1652 /* ******FIXME******* put these on config variables */
1653 dev->min_wait = 60 * 60;
1654 dev->max_wait = 24 * 60 * 60;
1655 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1656 dev->wait_sec = dev->min_wait;
1657 dev->rem_wait_sec = dev->wait_sec;
1660 dev->BadVolName[0] = 0;
1664 * Returns: true if time doubled
1665 * false if max time expired
1667 bool double_dev_wait_time(DEVICE *dev)
1669 dev->wait_sec *= 2; /* double wait time */
1670 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1671 dev->wait_sec = dev->max_wait;
1674 dev->rem_wait_sec = dev->wait_sec;
1675 if (dev->num_wait >= dev->max_num_wait) {
1681 void set_os_device_parameters(DEVICE *dev)
1683 #ifdef HAVE_LINUX_OS
1685 if (dev->min_block_size == dev->max_block_size &&
1686 dev->min_block_size == 0) { /* variable block mode */
1687 mt_com.mt_op = MTSETBLK;
1688 mt_com.mt_count = 0;
1689 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1690 clrerror_dev(dev, MTSETBLK);
1692 mt_com.mt_op = MTSETDRVBUFFER;
1693 mt_com.mt_count = MT_ST_CLEARBOOLEANS;
1694 if (!dev_cap(dev, CAP_TWOEOF)) {
1695 mt_com.mt_count |= MT_ST_TWO_FM;
1697 if (dev_cap(dev, CAP_EOM)) {
1698 mt_com.mt_count |= MT_ST_FAST_MTEOM;
1700 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1701 clrerror_dev(dev, MTSETBLK);
1707 #ifdef HAVE_NETBSD_OS
1709 if (dev->min_block_size == dev->max_block_size &&
1710 dev->min_block_size == 0) { /* variable block mode */
1711 mt_com.mt_op = MTSETBSIZ;
1712 mt_com.mt_count = 0;
1713 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1714 clrerror_dev(dev, MTSETBSIZ);
1716 /* Get notified at logical end of tape */
1717 mt_com.mt_op = MTEWARN;
1718 mt_com.mt_count = 1;
1719 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1720 clrerror_dev(dev, MTEWARN);
1726 #if HAVE_FREEBSD_OS || HAVE_OPENBSD_OS
1728 if (dev->min_block_size == dev->max_block_size &&
1729 dev->min_block_size == 0) { /* variable block mode */
1730 mt_com.mt_op = MTSETBSIZ;
1731 mt_com.mt_count = 0;
1732 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1733 clrerror_dev(dev, MTSETBSIZ);
1741 if (dev->min_block_size == dev->max_block_size &&
1742 dev->min_block_size == 0) { /* variable block mode */
1743 mt_com.mt_op = MTSRSZ;
1744 mt_com.mt_count = 0;
1745 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1746 clrerror_dev(dev, MTSRSZ);
1753 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat)
1755 return dev_cap(dev, CAP_MTIOCGET) &&
1756 ioctl(dev->fd, MTIOCGET, (char *)mt_stat) == 0 &&
1757 mt_stat->mt_fileno >= 0;