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->prt_name = get_memory(strlen(device->device_name) + strlen(device->hdr.name) + 20);
153 /* We edit "Resource-name" (physical-name) */
154 Mmsg(dev->prt_name, "\"%s\" (%s)", device->hdr.name, device->device_name);
155 dev->capabilities = device->cap_bits;
156 dev->min_block_size = device->min_block_size;
157 dev->max_block_size = device->max_block_size;
158 dev->max_volume_size = device->max_volume_size;
159 dev->max_file_size = device->max_file_size;
160 dev->volume_capacity = device->volume_capacity;
161 dev->max_rewind_wait = device->max_rewind_wait;
162 dev->max_open_wait = device->max_open_wait;
163 dev->max_open_vols = device->max_open_vols;
164 dev->vol_poll_interval = device->vol_poll_interval;
165 dev->max_spool_size = device->max_spool_size;
166 dev->drive_index = device->drive_index;
167 dev->autoselect = device->autoselect;
168 if (tape) { /* No parts on tapes */
169 dev->max_part_size = 0;
172 dev->max_part_size = device->max_part_size;
175 if (dev->vol_poll_interval && dev->vol_poll_interval < 60) {
176 dev->vol_poll_interval = 60;
178 dev->device = device;
181 dev->state |= ST_TAPE;
183 dev->state |= ST_FIFO;
184 dev->capabilities |= CAP_STREAM; /* set stream device */
186 dev->state |= ST_FILE;
189 /* If the device requires mount :
190 * - Check that the mount point is available
191 * - Check that (un)mount commands are defined
193 if (dev->is_file() && device->cap_bits & CAP_REQMOUNT) {
194 if (stat(device->mount_point, &statp) < 0) {
196 dev->dev_errno = errno;
197 Jmsg2(jcr, M_ERROR, 0, _("Unable to stat mount point %s: ERR=%s\n"),
198 device->mount_point, be.strerror());
201 if (!device->mount_command || !device->unmount_command) {
202 Jmsg0(jcr, M_ERROR_TERM, 0, _("Mount and unmount commands must defined for a device which requires mount.\n"));
204 if (!device->write_part_command) {
205 Jmsg0(jcr, M_ERROR_TERM, 0, _("Write part command must be defined for a device which requires mount.\n"));
207 dev->state |= ST_DVD;
210 if (dev->max_block_size > 1000000) {
211 Jmsg3(jcr, M_ERROR, 0, _("Block size %u on device %s is too large, using default %u\n"),
212 dev->max_block_size, dev->print_name(), DEFAULT_BLOCK_SIZE);
213 dev->max_block_size = 0;
215 if (dev->max_block_size % TAPE_BSIZE != 0) {
216 Jmsg2(jcr, M_WARNING, 0, _("Max block size %u not multiple of device %s block size.\n"),
217 dev->max_block_size, dev->print_name());
220 dev->errmsg = get_pool_memory(PM_EMSG);
223 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
225 dev->dev_errno = errstat;
226 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
227 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
229 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
231 dev->dev_errno = errstat;
232 Mmsg1(dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), be.strerror(errstat));
233 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
235 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
237 dev->dev_errno = errstat;
238 Mmsg1(dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), be.strerror(errstat));
239 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
241 if ((errstat = pthread_mutex_init(&dev->spool_mutex, NULL)) != 0) {
243 dev->dev_errno = errstat;
244 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
245 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
247 if ((errstat = rwl_init(&dev->lock)) != 0) {
249 dev->dev_errno = errstat;
250 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
251 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
255 dev->attached_dcrs = New(dlist(dcr, &dcr->dev_link));
256 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
262 * Open the device with the operating system and
263 * initialize buffer pointers.
265 * Returns: -1 on error
268 * Note, for a tape, the VolName is the name we give to the
269 * volume (not really used here), but for a file, the
270 * VolName represents the name of the file to be created/opened.
271 * In the case of a file, the full name is the device name
272 * (archive_name) with the VolName concatenated.
275 open_dev(DEVICE *dev, char *VolName, int mode)
277 if (dev->is_open()) {
279 * *****FIXME***** how to handle two threads wanting
280 * different volumes mounted???? E.g. one is waiting
281 * for the next volume to be mounted, and a new job
282 * starts and snatches up the device.
284 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
288 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
289 dev->print_name(), dev->use_count);
290 Emsg1(M_WARNING, 0, "%s", dev->errmsg);
294 bstrncpy(dev->VolCatInfo.VolCatName, VolName, sizeof(dev->VolCatInfo.VolCatName));
297 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
298 dev->dev_name, dev->VolCatInfo.VolCatName);
299 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
300 dev->label_type = B_BACULA_LABEL;
301 if (dev->is_tape() || dev->is_fifo()) {
305 Dmsg0(29, "open_dev: device is tape\n");
306 if (mode == OPEN_READ_WRITE) {
307 dev->mode = O_RDWR | O_BINARY;
308 } else if (mode == OPEN_READ_ONLY) {
309 dev->mode = O_RDONLY | O_BINARY;
310 } else if (mode == OPEN_WRITE_ONLY) {
311 dev->mode = O_WRONLY | O_BINARY;
313 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
315 timeout = dev->max_open_wait;
317 if (dev->is_fifo() && timeout) {
319 dev->tid = start_thread_timer(pthread_self(), timeout);
321 /* If busy retry each second for max_open_wait seconds */
322 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
324 if (errno == EINTR || errno == EAGAIN) {
327 /* Busy wait for specified time (default = 5 mins) */
328 if (errno == EBUSY && timeout-- > 0) {
329 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->print_name(), be.strerror());
333 /* IO error (no volume) try 10 times every 6 seconds */
334 if (errno == EIO && ioerrcnt-- > 0) {
338 dev->dev_errno = errno;
339 Mmsg2(&dev->errmsg, _("Unable to open device %s: ERR=%s\n"),
340 dev->print_name(), be.strerror(dev->dev_errno));
341 /* Stop any open timer we set */
343 stop_thread_timer(dev->tid);
346 Emsg0(M_FATAL, 0, dev->errmsg);
351 dev->state |= ST_OPENED;
353 update_pos_dev(dev); /* update position */
354 set_os_device_parameters(dev); /* do system dependent stuff */
356 /* Stop any open() timer we started */
358 stop_thread_timer(dev->tid);
361 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
363 POOL_MEM archive_name(PM_FNAME);
364 struct stat filestat;
366 * Handle opening of File Archive (not a tape)
368 if (dev->part == 0) {
373 /* if num_parts has not been set, but VolCatInfo is available, copy
374 * it from the VolCatInfo.VolCatParts */
375 if (dev->num_parts < dev->VolCatInfo.VolCatParts) {
376 dev->num_parts = dev->VolCatInfo.VolCatParts;
379 if (VolName == NULL || *VolName == 0) {
380 Mmsg(dev->errmsg, _("Could not open file device %s. No Volume name given.\n"),
384 get_filename(dev, VolName, archive_name);
386 if (mount_dev(dev, 1) < 0) {
387 Mmsg(dev->errmsg, _("Could not mount device %s.\n"),
389 Emsg0(M_FATAL, 0, dev->errmsg);
394 Dmsg2(29, "open_dev: device is disk %s (mode:%d)\n", archive_name.c_str(), mode);
395 dev->openmode = mode;
398 * If we are not trying to access the last part, set mode to
399 * OPEN_READ_ONLY as writing would be an error.
401 if (dev->part < dev->num_parts) {
402 mode = OPEN_READ_ONLY;
405 if (mode == OPEN_READ_WRITE) {
406 dev->mode = O_CREAT | O_RDWR | O_BINARY;
407 } else if (mode == OPEN_READ_ONLY) {
408 dev->mode = O_RDONLY | O_BINARY;
409 } else if (mode == OPEN_WRITE_ONLY) {
410 dev->mode = O_WRONLY | O_BINARY;
412 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
414 /* If creating file, give 0640 permissions */
415 if ((dev->fd = open(archive_name.c_str(), dev->mode, 0640)) < 0) {
417 dev->dev_errno = errno;
418 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name.c_str(), be.strerror());
419 Emsg0(M_FATAL, 0, dev->errmsg);
422 dev->state |= ST_OPENED;
424 update_pos_dev(dev); /* update position */
425 if (fstat(dev->fd, &filestat) < 0) {
427 dev->dev_errno = errno;
428 Mmsg2(&dev->errmsg, _("Could not fstat: %s, ERR=%s\n"), archive_name.c_str(), be.strerror());
429 Emsg0(M_FATAL, 0, dev->errmsg);
431 dev->part_size = filestat.st_size;
434 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);
435 if (dev->is_dvd() && (dev->mode != OPEN_READ_ONLY) &&
436 (dev->free_space_errno == 0 || dev->num_parts == dev->part)) {
437 update_free_space_dev(dev);
445 bool _rewind_dev(char *file, int line, DEVICE *dev)
447 Dmsg2(100, "rewind_dev called from %s:%d\n", file, line);
448 return rewind_dev(dev);
454 * Returns: true on success
457 bool rewind_dev(DEVICE *dev)
462 Dmsg1(29, "rewind_dev %s\n", dev->print_name());
464 dev->dev_errno = EBADF;
465 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
467 Emsg0(M_ABORT, 0, dev->errmsg);
470 dev->state &= ~(ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
471 dev->block_num = dev->file = 0;
474 if (dev->is_tape()) {
475 mt_com.mt_op = MTREW;
477 /* If we get an I/O error on rewind, it is probably because
478 * the drive is actually busy. We loop for (about 5 minutes)
479 * retrying every 5 seconds.
481 for (i=dev->max_rewind_wait; ; i -= 5) {
482 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
484 clrerror_dev(dev, MTREW);
485 if (i == dev->max_rewind_wait) {
486 Dmsg1(200, "Rewind error, %s. retrying ...\n", be.strerror());
488 if (dev->dev_errno == EIO && i > 0) {
489 Dmsg0(200, "Sleeping 5 seconds.\n");
493 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
494 dev->print_name(), be.strerror());
499 } else if (dev->is_file()) {
500 if (lseek_dev(dev, (off_t)0, SEEK_SET) < 0) {
502 dev->dev_errno = errno;
503 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
504 dev->print_name(), be.strerror());
512 * Called to indicate that we have just read an
513 * EOF from the device.
515 void DEVICE::set_eof()
525 * Called to indicate we are now at the end of the tape, and
526 * writing is not possible.
528 void DEVICE::set_eot()
530 state |= (ST_EOF|ST_EOT|ST_WEOT);
531 state &= ~ST_APPEND; /* make tape read-only */
535 * Position device to end of medium (end of data)
536 * Returns: true on succes
543 struct mtget mt_stat;
548 dev->dev_errno = EBADF;
549 Mmsg1(&dev->errmsg, _("Bad call to eod_dev. Device %s not open\n"),
553 Dmsg0(29, "eod_dev\n");
557 dev->state &= ~(ST_EOF); /* remove EOF flags */
558 dev->block_num = dev->file = 0;
561 if (dev->state & (ST_FIFO | ST_PROG)) {
564 if (!dev->is_tape()) {
565 pos = lseek_dev(dev, (off_t)0, SEEK_END);
566 // Dmsg1(100, "====== Seek to %lld\n", pos);
569 dev->state |= ST_EOT;
572 dev->dev_errno = errno;
574 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
575 dev->print_name(), be.strerror());
579 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
580 Dmsg0(100,"Using FAST FSF for EOM\n");
581 /* If unknown position, rewind */
582 if (!dev_get_os_pos(dev, &mt_stat)) {
583 if (!rewind_dev(dev)) {
587 mt_com.mt_op = MTFSF;
589 * ***FIXME*** fix code to handle case that INT16_MAX is
592 mt_com.mt_count = INT16_MAX; /* use big positive number */
593 if (mt_com.mt_count < 0) {
594 mt_com.mt_count = INT16_MAX; /* brain damaged system */
598 if (dev_cap(dev, CAP_MTIOCGET) && (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM))) {
599 if (dev_cap(dev, CAP_EOM)) {
600 Dmsg0(100,"Using EOM for EOM\n");
601 mt_com.mt_op = MTEOM;
605 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
607 clrerror_dev(dev, mt_com.mt_op);
608 Dmsg1(50, "ioctl error: %s\n", be.strerror());
610 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
611 dev->print_name(), be.strerror());
615 if (!dev_get_os_pos(dev, &mt_stat)) {
617 clrerror_dev(dev, -1);
618 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
619 dev->print_name(), be.strerror());
622 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
624 dev->file = mt_stat.mt_fileno;
630 * Rewind then use FSF until EOT reached
632 if (!rewind_dev(dev)) {
636 * Move file by file to the end of the tape
639 for (file_num=dev->file; !dev->at_eot(); file_num++) {
640 Dmsg0(200, "eod_dev: doing fsf 1\n");
641 if (!fsf_dev(dev, 1)) {
642 Dmsg0(200, "fsf_dev error.\n");
646 * Avoid infinite loop. ***FIXME*** possibly add code
647 * to set EOD or to turn off CAP_FASTFSF if on.
649 if (file_num == (int)dev->file) {
650 struct mtget mt_stat;
651 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
652 if (dev_get_os_pos(dev, &mt_stat)) {
653 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
655 dev->file = mt_stat.mt_fileno;
662 * Some drivers leave us after second EOF when doing
663 * MTEOM, so we must backup so that appending overwrites
666 if (dev_cap(dev, CAP_BSFATEOM)) {
667 struct mtget mt_stat;
668 /* Backup over EOF */
669 ok = bsf_dev(dev, 1);
670 /* If BSF worked and fileno is known (not -1), set file */
671 if (dev_get_os_pos(dev, &mt_stat)) {
672 Dmsg2(100, "BSFATEOF adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
673 dev->file = mt_stat.mt_fileno;
675 dev->file++; /* wing it -- not correct on all OSes */
678 update_pos_dev(dev); /* update position */
680 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
685 * Set the position of the device -- only for files
686 * For other devices, there is no generic way to do it.
687 * Returns: true on succes
690 bool update_pos_dev(DEVICE *dev)
696 dev->dev_errno = EBADF;
697 Mmsg0(&dev->errmsg, _("Bad device call. Device not open\n"));
698 Emsg0(M_FATAL, 0, dev->errmsg);
702 /* Find out where we are */
703 if (dev->is_file()) {
706 pos = lseek_dev(dev, (off_t)0, SEEK_CUR);
709 dev->dev_errno = errno;
710 Pmsg1(000, "Seek error: ERR=%s\n", be.strerror());
711 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
712 dev->print_name(), be.strerror());
715 dev->file_addr = pos;
723 * Return the status of the device. This was meant
724 * to be a generic routine. Unfortunately, it doesn't
725 * seem possible (at least I do not know how to do it
726 * currently), which means that for the moment, this
727 * routine has very little value.
731 uint32_t status_dev(DEVICE *dev)
733 struct mtget mt_stat;
736 if (dev->state & (ST_EOT | ST_WEOT)) {
740 if (dev->state & ST_EOF) {
744 if (dev->is_tape()) {
746 Dmsg0(-20," Bacula status:");
747 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
748 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
750 dev->dev_errno = errno;
751 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
752 dev->print_name(), be.strerror());
755 Dmsg0(-20, " Device status:");
757 #if defined(HAVE_LINUX_OS)
758 if (GMT_EOF(mt_stat.mt_gstat)) {
762 if (GMT_BOT(mt_stat.mt_gstat)) {
766 if (GMT_EOT(mt_stat.mt_gstat)) {
770 if (GMT_SM(mt_stat.mt_gstat)) {
774 if (GMT_EOD(mt_stat.mt_gstat)) {
778 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
780 Dmsg0(-20, " WR_PROT");
782 if (GMT_ONLINE(mt_stat.mt_gstat)) {
784 Dmsg0(-20, " ONLINE");
786 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
788 Dmsg0(-20, " DR_OPEN");
790 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
791 stat |= BMT_IM_REP_EN;
792 Dmsg0(-20, " IM_REP_EN");
794 #endif /* !SunOS && !OSF */
795 if (dev_cap(dev, CAP_MTIOCGET)) {
796 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
798 Dmsg2(-20, " file=%d block=%d\n", -1, -1);
801 stat |= BMT_ONLINE | BMT_BOT;
808 * Load medium in device
809 * Returns: true on success
812 bool load_dev(DEVICE *dev)
819 dev->dev_errno = EBADF;
820 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Device not open\n"));
821 Emsg0(M_FATAL, 0, dev->errmsg);
824 if (!(dev->is_tape())) {
828 Dmsg0(200, "stored: MTLOAD command not available\n");
830 dev->dev_errno = ENOTTY; /* function not available */
831 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
832 dev->print_name(), be.strerror());
836 dev->block_num = dev->file = 0;
839 mt_com.mt_op = MTLOAD;
841 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
843 dev->dev_errno = errno;
844 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
845 dev->print_name(), be.strerror());
853 * Rewind device and put it offline
854 * Returns: true on success
857 bool offline_dev(DEVICE *dev)
862 dev->dev_errno = EBADF;
863 Mmsg0(&dev->errmsg, _("Bad call to offline_dev. Device not open\n"));
864 Emsg0(M_FATAL, 0, dev->errmsg);
867 if (!(dev->is_tape())) {
871 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
872 dev->block_num = dev->file = 0;
877 mt_com.mt_op = MTUNLOCK;
879 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
881 mt_com.mt_op = MTOFFL;
883 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
885 dev->dev_errno = errno;
886 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
887 dev->print_name(), be.strerror());
890 Dmsg1(100, "Offlined device %s\n", dev->print_name());
894 bool offline_or_rewind_dev(DEVICE *dev)
899 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
900 return offline_dev(dev);
903 * Note, this rewind probably should not be here (it wasn't
904 * in prior versions of Bacula), but on FreeBSD, this is
905 * needed in the case the tape was "frozen" due to an error
906 * such as backspacing after writing and EOF. If it is not
907 * done, all future references to the drive get and I/O error.
909 clrerror_dev(dev, MTREW);
910 return rewind_dev(dev);
915 * Foward space a file
916 * Returns: true on success
920 fsf_dev(DEVICE *dev, int num)
922 struct mtget mt_stat;
927 dev->dev_errno = EBADF;
928 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Device not open\n"));
929 Emsg0(M_FATAL, 0, dev->errmsg);
933 if (!dev->is_tape()) {
936 if (dev->state & ST_EOT) {
938 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
941 if (dev->state & ST_EOF) {
942 Dmsg0(200, "ST_EOF set on entry to FSF\n");
945 Dmsg0(100, "fsf_dev\n");
948 * If Fast forward space file is set, then we
949 * use MTFSF to forward space and MTIOCGET
950 * to get the file position. We assume that
951 * the SCSI driver will ensure that we do not
952 * forward space past the end of the medium.
954 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_MTIOCGET) && dev_cap(dev, CAP_FASTFSF)) {
955 mt_com.mt_op = MTFSF;
956 mt_com.mt_count = num;
957 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
958 if (stat < 0 || !dev_get_os_pos(dev, &mt_stat)) {
960 dev->state |= ST_EOT;
961 Dmsg0(200, "Set ST_EOT\n");
962 clrerror_dev(dev, MTFSF);
963 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
964 dev->print_name(), be.strerror());
965 Dmsg1(200, "%s", dev->errmsg);
968 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
970 dev->file = mt_stat.mt_fileno;
974 * Here if CAP_FSF is set, and virtually all drives
975 * these days support it, we read a record, then forward
976 * space one file. Using this procedure, which is slow,
977 * is the only way we can be sure that we don't read
978 * two consecutive EOF marks, which means End of Data.
980 } else if (dev_cap(dev, CAP_FSF)) {
983 Dmsg0(200, "FSF has cap_fsf\n");
984 if (dev->max_block_size == 0) {
985 rbuf_len = DEFAULT_BLOCK_SIZE;
987 rbuf_len = dev->max_block_size;
989 rbuf = get_memory(rbuf_len);
990 mt_com.mt_op = MTFSF;
992 while (num-- && !(dev->state & ST_EOT)) {
993 Dmsg0(100, "Doing read before fsf\n");
994 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
995 if (errno == ENOMEM) { /* tape record exceeds buf len */
996 stat = rbuf_len; /* This is OK */
999 dev->state |= ST_EOT;
1000 clrerror_dev(dev, -1);
1001 Dmsg2(100, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
1003 Mmsg2(dev->errmsg, _("read error on %s. ERR=%s.\n"),
1004 dev->print_name(), be.strerror());
1005 Dmsg1(100, "%s", dev->errmsg);
1009 if (stat == 0) { /* EOF */
1010 update_pos_dev(dev);
1011 Dmsg1(100, "End of File mark from read. File=%d\n", dev->file+1);
1012 /* Two reads of zero means end of tape */
1013 if (dev->state & ST_EOF) {
1014 dev->state |= ST_EOT;
1015 Dmsg0(100, "Set ST_EOT\n");
1021 } else { /* Got data */
1022 dev->state &= ~(ST_EOF|ST_EOT);
1025 Dmsg0(100, "Doing MTFSF\n");
1026 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1027 if (stat < 0) { /* error => EOT */
1029 dev->state |= ST_EOT;
1030 Dmsg0(100, "Set ST_EOT\n");
1031 clrerror_dev(dev, MTFSF);
1032 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1033 dev->print_name(), be.strerror());
1034 Dmsg0(100, "Got < 0 for MTFSF\n");
1035 Dmsg1(100, "%s", dev->errmsg);
1043 * No FSF, so use FSR to simulate it
1046 Dmsg0(200, "Doing FSR for FSF\n");
1047 while (num-- && !(dev->state & ST_EOT)) {
1048 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
1050 if (dev->state & ST_EOT) {
1052 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
1058 update_pos_dev(dev);
1059 Dmsg1(200, "Return %d from FSF\n", stat);
1060 if (dev->state & ST_EOF)
1061 Dmsg0(200, "ST_EOF set on exit FSF\n");
1062 if (dev->state & ST_EOT)
1063 Dmsg0(200, "ST_EOT set on exit FSF\n");
1064 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
1069 * Backward space a file
1070 * Returns: false on failure
1074 bsf_dev(DEVICE *dev, int num)
1080 dev->dev_errno = EBADF;
1081 Mmsg0(dev->errmsg, _("Bad call to bsf_dev. Device not open\n"));
1082 Emsg0(M_FATAL, 0, dev->errmsg);
1086 if (!dev->is_tape()) {
1087 Mmsg1(dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
1091 Dmsg0(29, "bsf_dev\n");
1092 dev->state &= ~(ST_EOT|ST_EOF);
1096 mt_com.mt_op = MTBSF;
1097 mt_com.mt_count = num;
1098 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1101 clrerror_dev(dev, MTBSF);
1102 Mmsg2(dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
1103 dev->print_name(), be.strerror());
1105 update_pos_dev(dev);
1111 * Foward space a record
1112 * Returns: false on failure
1116 fsr_dev(DEVICE *dev, int num)
1122 dev->dev_errno = EBADF;
1123 Mmsg0(dev->errmsg, _("Bad call to fsr_dev. Device not open\n"));
1124 Emsg0(M_FATAL, 0, dev->errmsg);
1128 if (!dev->is_tape()) {
1131 if (!dev_cap(dev, CAP_FSR)) {
1132 Mmsg1(dev->errmsg, _("ioctl MTFSR not permitted on %s.\n"), dev->print_name());
1136 Dmsg1(29, "fsr_dev %d\n", num);
1137 mt_com.mt_op = MTFSR;
1138 mt_com.mt_count = num;
1139 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1141 dev->state &= ~ST_EOF;
1142 dev->block_num += num;
1145 struct mtget mt_stat;
1146 clrerror_dev(dev, MTFSR);
1147 Dmsg1(100, "FSF fail: ERR=%s\n", be.strerror());
1148 if (dev_get_os_pos(dev, &mt_stat)) {
1149 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", dev->file,
1150 dev->block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
1151 dev->file = mt_stat.mt_fileno;
1152 dev->block_num = mt_stat.mt_blkno;
1154 if (dev->state & ST_EOF) {
1155 dev->state |= ST_EOT;
1160 Mmsg2(dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
1161 dev->print_name(), be.strerror());
1163 update_pos_dev(dev);
1168 * Backward space a record
1169 * Returns: false on failure
1173 bsr_dev(DEVICE *dev, int num)
1179 dev->dev_errno = EBADF;
1180 Mmsg0(dev->errmsg, _("Bad call to bsr_dev. Device not open\n"));
1181 Emsg0(M_FATAL, 0, dev->errmsg);
1185 if (!dev->is_tape()) {
1189 if (!dev_cap(dev, CAP_BSR)) {
1190 Mmsg1(dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"), dev->print_name());
1194 Dmsg0(29, "bsr_dev\n");
1195 dev->block_num -= num;
1196 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1197 mt_com.mt_op = MTBSR;
1198 mt_com.mt_count = num;
1199 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1202 clrerror_dev(dev, MTBSR);
1203 Mmsg2(dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1204 dev->print_name(), be.strerror());
1206 update_pos_dev(dev);
1211 * Reposition the device to file, block
1212 * Returns: false on failure
1216 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1219 dev->dev_errno = EBADF;
1220 Mmsg0(dev->errmsg, _("Bad call to reposition_dev. Device not open\n"));
1221 Emsg0(M_FATAL, 0, dev->errmsg);
1225 if (!dev->is_tape()) {
1226 off_t pos = (((off_t)file)<<32) + block;
1227 Dmsg1(100, "===== lseek_dev to %d\n", (int)pos);
1228 if (lseek_dev(dev, pos, SEEK_SET) == (off_t)-1) {
1230 dev->dev_errno = errno;
1231 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
1232 dev->print_name(), be.strerror());
1236 dev->block_num = block;
1237 dev->file_addr = pos;
1240 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1241 dev->file, dev->block_num, file, block);
1242 if (file < dev->file) {
1243 Dmsg0(100, "Rewind_dev\n");
1244 if (!rewind_dev(dev)) {
1248 if (file > dev->file) {
1249 Dmsg1(100, "fsf %d\n", file-dev->file);
1250 if (!fsf_dev(dev, file-dev->file)) {
1251 Dmsg1(100, "fsf failed! ERR=%s\n", strerror_dev(dev));
1254 Dmsg2(100, "wanted_file=%d at_file=%d\n", file, dev->file);
1256 if (block < dev->block_num) {
1257 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1258 Dmsg0(100, "bsf_dev 1\n");
1260 Dmsg0(100, "fsf_dev 1\n");
1262 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1264 if (dev_cap(dev, CAP_POSITIONBLOCKS) && block > dev->block_num) {
1265 /* Ignore errors as Bacula can read to the correct block */
1266 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1267 return fsr_dev(dev, block-dev->block_num);
1275 * Write an end of file on the device
1276 * Returns: 0 on success
1277 * non-zero on failure
1280 weof_dev(DEVICE *dev, int num)
1284 Dmsg0(29, "weof_dev\n");
1287 dev->dev_errno = EBADF;
1288 Mmsg0(dev->errmsg, _("Bad call to weof_dev. Device not open\n"));
1289 Emsg0(M_FATAL, 0, dev->errmsg);
1294 if (!dev->is_tape()) {
1297 if (!dev->can_append()) {
1298 Mmsg0(dev->errmsg, _("Attempt to WEOF on non-appendable Volume\n"));
1299 Emsg0(M_FATAL, 0, dev->errmsg);
1303 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1304 mt_com.mt_op = MTWEOF;
1305 mt_com.mt_count = num;
1306 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1313 clrerror_dev(dev, MTWEOF);
1315 Mmsg2(dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1316 dev->print_name(), be.strerror());
1323 * Return string message with last error in English
1324 * Be careful not to call this routine from within dev.c
1325 * while editing an Mmsg() or you will end up in a recursive
1326 * loop creating a Segmentation Violation.
1329 strerror_dev(DEVICE *dev)
1336 * If implemented in system, clear the tape
1340 clrerror_dev(DEVICE *dev, int func)
1342 const char *msg = NULL;
1343 struct mtget mt_stat;
1346 dev->dev_errno = errno; /* save errno */
1348 dev->VolCatInfo.VolCatErrors++;
1351 if (!dev->is_tape()) {
1354 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1357 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1361 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1366 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1371 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1375 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1379 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1383 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1404 bsnprintf(buf, sizeof(buf), "unknown func code %d", func);
1409 dev->dev_errno = ENOSYS;
1410 Mmsg1(dev->errmsg, _("I/O function \"%s\" not supported on this device.\n"), msg);
1411 Emsg0(M_ERROR, 0, dev->errmsg);
1414 /* On some systems such as NetBSD, this clears all errors */
1415 ioctl(dev->fd, MTIOCGET, (char *)&mt_stat);
1417 /* Found on Linux */
1421 mt_com.mt_op = MTIOCLRERR;
1422 mt_com.mt_count = 1;
1423 /* Clear any error condition on the tape */
1424 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1425 Dmsg0(200, "Did MTIOCLRERR\n");
1429 /* Typically on FreeBSD */
1432 /* Read and clear SCSI error status */
1433 union mterrstat mt_errstat;
1434 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1435 strerror(dev->dev_errno));
1436 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1440 /* Clear Subsystem Exception OSF1 */
1444 mt_com.mt_op = MTCSE;
1445 mt_com.mt_count = 1;
1446 /* Clear any error condition on the tape */
1447 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1448 Dmsg0(200, "Did MTCSE\n");
1454 * Flush buffer contents
1457 int flush_dev(DEVICE *dev)
1462 static void do_close(DEVICE *dev)
1465 Dmsg1(29, "really close_dev %s\n", dev->print_name());
1470 if (unmount_dev(dev, 1) < 0) {
1471 Dmsg1(0, "Cannot unmount device %s.\n", dev->print_name());
1474 /* Remove the last part file if it is empty */
1475 if (dev->can_append() && (dev->num_parts > 0)) {
1477 POOL_MEM archive_name(PM_FNAME);
1478 dev->part = dev->num_parts;
1479 get_filename(dev, dev->VolCatInfo.VolCatName, archive_name);
1480 /* Check that the part file is empty */
1481 if ((stat(archive_name.c_str(), &statp) == 0) && (statp.st_size == 0)) {
1482 unlink(archive_name.c_str());
1486 /* Clean up device packet so it can be reused */
1488 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1489 dev->label_type = B_BACULA_LABEL;
1490 dev->file = dev->block_num = 0;
1495 dev->part_start = 0;
1496 dev->EndFile = dev->EndBlock = 0;
1497 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1498 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1500 stop_thread_timer(dev->tid);
1510 close_dev(DEVICE *dev)
1513 Mmsg0(&dev->errmsg, _("Bad call to close_dev. Device not open\n"));
1514 Emsg0(M_FATAL, 0, dev->errmsg);
1517 /*if (dev->fd >= 0 && dev->use_count == 1) {*/
1518 /* No need to check if dev->fd >= 0: it is checked again
1519 * in do_close, and do_close MUST be called for volumes
1520 * splitted in parts, even if dev->fd == -1. */
1521 if (dev->use_count == 1) {
1523 } else if (dev->use_count > 0) {
1528 ASSERT(dev->use_count >= 0);
1533 * Used when unmounting the device, ignore use_count
1535 void force_close_dev(DEVICE *dev)
1538 Mmsg0(&dev->errmsg, _("Bad call to force_close_dev. Device not open\n"));
1539 Emsg0(M_FATAL, 0, dev->errmsg);
1542 Dmsg1(29, "Force close_dev %s\n", dev->print_name());
1546 ASSERT(dev->use_count >= 0);
1550 bool truncate_dev(DEVICE *dev)
1552 Dmsg1(100, "truncate_dev %s\n", dev->print_name());
1553 if (dev->is_tape()) {
1554 return true; /* we don't really truncate tapes */
1555 /* maybe we should rewind and write and eof ???? */
1558 /* If there is more than one part, open the first one, and then truncate it. */
1559 if (dev->num_parts > 0) {
1561 dev->VolCatInfo.VolCatParts = 0;
1562 if (open_first_part(dev) < 0) {
1564 Mmsg1(&dev->errmsg, "Unable to truncate device, because I'm unable to open the first part. ERR=%s\n", be.strerror());
1568 if (ftruncate(dev->fd, 0) != 0) {
1570 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), be.strerror());
1577 dev_is_tape(DEVICE *dev)
1579 return dev->is_tape() ? true : false;
1584 * return 1 if the device is read for write, and 0 otherwise
1585 * This is meant for checking at the end of a job to see
1586 * if we still have a tape (perhaps not if at end of tape
1587 * and the job is canceled).
1590 dev_can_write(DEVICE *dev)
1592 if (dev->is_open() && dev->can_append() &&
1593 dev->is_labeled() && !(dev->state & ST_WEOT)) {
1600 /* Return the resource name for the device */
1601 const char *DEVICE::name() const
1603 return device->hdr.name;
1607 dev_vol_name(DEVICE *dev)
1609 return dev->VolCatInfo.VolCatName;
1612 uint32_t dev_block(DEVICE *dev)
1614 update_pos_dev(dev);
1615 return dev->block_num;
1618 uint32_t dev_file(DEVICE *dev)
1620 update_pos_dev(dev);
1625 * Free memory allocated for the device
1628 term_dev(DEVICE *dev)
1631 dev->dev_errno = EBADF;
1632 Mmsg0(&dev->errmsg, _("Bad call to term_dev. Device not open\n"));
1633 Emsg0(M_FATAL, 0, dev->errmsg);
1637 Dmsg0(29, "term_dev\n");
1638 if (dev->dev_name) {
1639 free_memory(dev->dev_name);
1640 dev->dev_name = NULL;
1642 if (dev->prt_name) {
1643 free_memory(dev->prt_name);
1644 dev->prt_name = NULL;
1647 free_pool_memory(dev->errmsg);
1650 pthread_mutex_destroy(&dev->mutex);
1651 pthread_cond_destroy(&dev->wait);
1652 pthread_cond_destroy(&dev->wait_next_vol);
1653 pthread_mutex_destroy(&dev->spool_mutex);
1654 rwl_destroy(&dev->lock);
1655 if (dev->attached_dcrs) {
1656 delete dev->attached_dcrs;
1657 dev->attached_dcrs = NULL;
1659 if (dev->state & ST_MALLOC) {
1660 free_pool_memory((POOLMEM *)dev);
1665 * This routine initializes the device wait timers
1667 void init_dev_wait_timers(DEVICE *dev)
1669 /* ******FIXME******* put these on config variables */
1670 dev->min_wait = 60 * 60;
1671 dev->max_wait = 24 * 60 * 60;
1672 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1673 dev->wait_sec = dev->min_wait;
1674 dev->rem_wait_sec = dev->wait_sec;
1677 dev->BadVolName[0] = 0;
1681 * Returns: true if time doubled
1682 * false if max time expired
1684 bool double_dev_wait_time(DEVICE *dev)
1686 dev->wait_sec *= 2; /* double wait time */
1687 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1688 dev->wait_sec = dev->max_wait;
1691 dev->rem_wait_sec = dev->wait_sec;
1692 if (dev->num_wait >= dev->max_num_wait) {
1698 void set_os_device_parameters(DEVICE *dev)
1700 #ifdef HAVE_LINUX_OS
1702 if (dev->min_block_size == dev->max_block_size &&
1703 dev->min_block_size == 0) { /* variable block mode */
1704 mt_com.mt_op = MTSETBLK;
1705 mt_com.mt_count = 0;
1706 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1707 clrerror_dev(dev, MTSETBLK);
1709 mt_com.mt_op = MTSETDRVBUFFER;
1710 mt_com.mt_count = MT_ST_CLEARBOOLEANS;
1711 if (!dev_cap(dev, CAP_TWOEOF)) {
1712 mt_com.mt_count |= MT_ST_TWO_FM;
1714 if (dev_cap(dev, CAP_EOM)) {
1715 mt_com.mt_count |= MT_ST_FAST_MTEOM;
1717 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1718 clrerror_dev(dev, MTSETBLK);
1724 #ifdef HAVE_NETBSD_OS
1726 if (dev->min_block_size == dev->max_block_size &&
1727 dev->min_block_size == 0) { /* variable block mode */
1728 mt_com.mt_op = MTSETBSIZ;
1729 mt_com.mt_count = 0;
1730 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1731 clrerror_dev(dev, MTSETBSIZ);
1733 /* Get notified at logical end of tape */
1734 mt_com.mt_op = MTEWARN;
1735 mt_com.mt_count = 1;
1736 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1737 clrerror_dev(dev, MTEWARN);
1743 #if HAVE_FREEBSD_OS || HAVE_OPENBSD_OS
1745 if (dev->min_block_size == dev->max_block_size &&
1746 dev->min_block_size == 0) { /* variable block mode */
1747 mt_com.mt_op = MTSETBSIZ;
1748 mt_com.mt_count = 0;
1749 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1750 clrerror_dev(dev, MTSETBSIZ);
1758 if (dev->min_block_size == dev->max_block_size &&
1759 dev->min_block_size == 0) { /* variable block mode */
1760 mt_com.mt_op = MTSRSZ;
1761 mt_com.mt_count = 0;
1762 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1763 clrerror_dev(dev, MTSRSZ);
1770 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat)
1772 return dev_cap(dev, CAP_MTIOCGET) &&
1773 ioctl(dev->fd, MTIOCGET, (char *)mt_stat) == 0 &&
1774 mt_stat->mt_fileno >= 0;