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.
87 /* Functions in dvd.c */
88 void get_filename(DEVICE *dev, char *VolName, POOL_MEM& archive_name);
89 int mount_dev(DEVICE* dev, int timeout);
90 int unmount_dev(DEVICE *dev, int timeout);
91 void update_free_space_dev(DEVICE* dev);
94 /* Forward referenced functions */
95 void set_os_device_parameters(DEVICE *dev);
96 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat);
97 static void open_tape_device(DEVICE *dev, int mode);
98 static void open_file_device(DEVICE *dev, int mode);
101 * Allocate and initialize the DEVICE structure
102 * Note, if dev is non-NULL, it is already allocated,
103 * thus we neither allocate it nor free it. This allows
104 * the caller to put the packet in shared memory.
106 * Note, for a tape, the device->device_name is the device name
107 * (e.g. /dev/nst0), and for a file, the device name
108 * is the directory in which the file will be placed.
112 init_dev(JCR *jcr, DEVICE *dev, DEVRES *device)
119 /* Check that device is available */
120 if (stat(device->device_name, &statp) < 0) {
123 dev->dev_errno = errno;
125 Jmsg2(jcr, M_ERROR, 0, _("Unable to stat device %s: ERR=%s\n"),
126 device->device_name, be.strerror());
133 if (S_ISDIR(statp.st_mode)) {
135 } else if (S_ISCHR(statp.st_mode)) {
137 } else if (S_ISFIFO(statp.st_mode)) {
139 } else if (!(device->cap_bits & CAP_REQMOUNT)) {
141 dev->dev_errno = ENODEV;
143 Jmsg2(jcr, M_ERROR, 0, _("%s is an unknown device type. Must be tape or directory. st_mode=%x\n"),
144 device->device_name, statp.st_mode);
148 dev = (DEVICE *)get_memory(sizeof(DEVICE));
149 memset(dev, 0, sizeof(DEVICE));
150 dev->state = ST_MALLOC;
152 memset(dev, 0, sizeof(DEVICE));
155 /* Copy user supplied device parameters from Resource */
156 dev->dev_name = get_memory(strlen(device->device_name)+1);
157 pm_strcpy(dev->dev_name, device->device_name);
158 dev->prt_name = get_memory(strlen(device->device_name) + strlen(device->hdr.name) + 20);
159 /* We edit "Resource-name" (physical-name) */
160 Mmsg(dev->prt_name, "\"%s\" (%s)", device->hdr.name, device->device_name);
161 dev->capabilities = device->cap_bits;
162 dev->min_block_size = device->min_block_size;
163 dev->max_block_size = device->max_block_size;
164 dev->max_volume_size = device->max_volume_size;
165 dev->max_file_size = device->max_file_size;
166 dev->volume_capacity = device->volume_capacity;
167 dev->max_rewind_wait = device->max_rewind_wait;
168 dev->max_open_wait = device->max_open_wait;
169 dev->max_open_vols = device->max_open_vols;
170 dev->vol_poll_interval = device->vol_poll_interval;
171 dev->max_spool_size = device->max_spool_size;
172 dev->drive_index = device->drive_index;
173 dev->autoselect = device->autoselect;
174 if (tape) { /* No parts on tapes */
175 dev->max_part_size = 0;
178 dev->max_part_size = device->max_part_size;
181 if (dev->vol_poll_interval && dev->vol_poll_interval < 60) {
182 dev->vol_poll_interval = 60;
184 dev->device = device;
187 dev->state |= ST_TAPE;
189 dev->state |= ST_FIFO;
190 dev->capabilities |= CAP_STREAM; /* set stream device */
192 dev->state |= ST_FILE;
195 /* If the device requires mount :
196 * - Check that the mount point is available
197 * - Check that (un)mount commands are defined
199 if (dev->is_file() && device->cap_bits & CAP_REQMOUNT) {
200 if (stat(device->mount_point, &statp) < 0) {
202 dev->dev_errno = errno;
203 Jmsg2(jcr, M_ERROR, 0, _("Unable to stat mount point %s: ERR=%s\n"),
204 device->mount_point, be.strerror());
207 if (!device->mount_command || !device->unmount_command) {
208 Jmsg0(jcr, M_ERROR_TERM, 0, _("Mount and unmount commands must defined for a device which requires mount.\n"));
210 if (!device->write_part_command) {
211 Jmsg0(jcr, M_ERROR_TERM, 0, _("Write part command must be defined for a device which requires mount.\n"));
213 dev->state |= ST_DVD;
216 if (dev->max_block_size > 1000000) {
217 Jmsg3(jcr, M_ERROR, 0, _("Block size %u on device %s is too large, using default %u\n"),
218 dev->max_block_size, dev->print_name(), DEFAULT_BLOCK_SIZE);
219 dev->max_block_size = 0;
221 if (dev->max_block_size % TAPE_BSIZE != 0) {
222 Jmsg2(jcr, M_WARNING, 0, _("Max block size %u not multiple of device %s block size.\n"),
223 dev->max_block_size, dev->print_name());
226 dev->errmsg = get_pool_memory(PM_EMSG);
229 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
231 dev->dev_errno = errstat;
232 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
233 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
235 if ((errstat = pthread_cond_init(&dev->wait, 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_cond_init(&dev->wait_next_vol, NULL)) != 0) {
243 dev->dev_errno = errstat;
244 Mmsg1(dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), be.strerror(errstat));
245 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
247 if ((errstat = pthread_mutex_init(&dev->spool_mutex, NULL)) != 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);
253 if ((errstat = rwl_init(&dev->lock)) != 0) {
255 dev->dev_errno = errstat;
256 Mmsg1(dev->errmsg, _("Unable to init mutex: ERR=%s\n"), be.strerror(errstat));
257 Jmsg0(jcr, M_ERROR_TERM, 0, dev->errmsg);
261 dev->attached_dcrs = New(dlist(dcr, &dcr->dev_link));
262 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev->is_tape(), dev->dev_name);
268 * Open the device with the operating system and
269 * initialize buffer pointers.
271 * Returns: -1 on error
274 * Note, for a tape, the VolName is the name we give to the
275 * volume (not really used here), but for a file, the
276 * VolName represents the name of the file to be created/opened.
277 * In the case of a file, the full name is the device name
278 * (archive_name) with the VolName concatenated.
281 open_dev(DEVICE *dev, char *VolName, int mode)
283 if (dev->is_open()) {
284 if (dev->openmode == mode) {
287 close(dev->fd); /* close so correct mode will be used */
291 bstrncpy(dev->VolCatInfo.VolCatName, VolName, sizeof(dev->VolCatInfo.VolCatName));
293 dev->VolCatInfo.VolCatName[0] = 0;
296 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev->is_tape(),
297 dev->dev_name, dev->VolCatInfo.VolCatName);
298 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
299 dev->label_type = B_BACULA_LABEL;
300 if (dev->is_tape() || dev->is_fifo()) {
301 open_tape_device(dev, mode);
303 open_file_device(dev, mode);
308 static void open_tape_device(DEVICE *dev, int mode)
310 int nonblocking = 0;;
314 Dmsg0(29, "open_dev: device is tape\n");
316 if (mode == OPEN_READ_WRITE) {
317 dev->mode = O_RDWR | O_BINARY;
318 } else if (mode == OPEN_READ_ONLY) {
319 dev->mode = O_RDONLY | O_BINARY;
320 } else if (mode == OPEN_WRITE_ONLY) {
321 dev->mode = O_WRONLY | O_BINARY;
323 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
325 timeout = dev->max_open_wait;
327 if (dev->open_nowait) {
328 /* Set wait counters to zero for no wait */
329 timeout = ioerrcnt = 0;
330 /* Open drive in non-block mode */
331 nonblocking = O_NONBLOCK;
333 if (dev->is_fifo() && timeout) {
335 dev->tid = start_thread_timer(pthread_self(), timeout);
337 /* If busy retry each second for max_open_wait seconds */
339 Dmsg1(500, "Try open %s\n", dev->dev_name);
340 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW+nonblocking)) < 0) {
342 Dmsg2(500, "Open error errno=%d ERR=%s\n", errno, be.strerror());
343 if (errno == EINTR || errno == EAGAIN) {
344 Dmsg0(500, "Continue open\n");
347 /* Busy wait for specified time (default = 5 mins) */
348 if (errno == EBUSY && timeout-- > 0) {
349 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->print_name(), be.strerror());
353 /* IO error (no volume) try 10 times every 6 seconds */
354 if (errno == EIO && ioerrcnt-- > 0) {
356 Dmsg0(500, "Continue open\n");
359 dev->dev_errno = errno;
360 Mmsg2(dev->errmsg, _("Unable to open device %s: ERR=%s\n"),
361 dev->print_name(), be.strerror(dev->dev_errno));
362 /* Stop any open timer we set */
364 stop_thread_timer(dev->tid);
367 Emsg0(M_FATAL, 0, dev->errmsg);
371 /* If opened in non-block mode, close it an open it normally */
377 dev->openmode = mode; /* save open mode */
379 dev->state |= ST_OPENED;
381 update_pos_dev(dev); /* update position */
382 set_os_device_parameters(dev); /* do system dependent stuff */
383 Dmsg0(500, "Open OK\n");
385 /* Stop any open() timer we started */
387 stop_thread_timer(dev->tid);
390 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
394 * Open a file or DVD device
396 static void open_file_device(DEVICE *dev, int mode)
398 POOL_MEM archive_name(PM_FNAME);
399 struct stat filestat;
401 * Handle opening of File Archive (not a tape)
403 if (dev->part == 0) {
408 /* if num_parts has not been set, but VolCatInfo is available, copy
409 * it from the VolCatInfo.VolCatParts */
410 if (dev->num_parts < dev->VolCatInfo.VolCatParts) {
411 dev->num_parts = dev->VolCatInfo.VolCatParts;
414 if (dev->VolCatInfo.VolCatName[0] == 0) {
415 Mmsg(dev->errmsg, _("Could not open file device %s. No Volume name given.\n"),
420 get_filename(dev, dev->VolCatInfo.VolCatName, archive_name);
422 if (mount_dev(dev, 1) < 0) {
423 Mmsg(dev->errmsg, _("Could not mount device %s.\n"),
425 Emsg0(M_FATAL, 0, dev->errmsg);
430 Dmsg2(29, "open_dev: device is disk %s (mode:%d)\n", archive_name.c_str(), mode);
431 dev->openmode = mode;
434 * If we are not trying to access the last part, set mode to
435 * OPEN_READ_ONLY as writing would be an error.
437 if (dev->part < dev->num_parts) {
438 mode = OPEN_READ_ONLY;
441 if (mode == OPEN_READ_WRITE) {
442 dev->mode = O_CREAT | O_RDWR | O_BINARY;
443 } else if (mode == OPEN_READ_ONLY) {
444 dev->mode = O_RDONLY | O_BINARY;
445 } else if (mode == OPEN_WRITE_ONLY) {
446 dev->mode = O_WRONLY | O_BINARY;
448 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
450 /* If creating file, give 0640 permissions */
451 if ((dev->fd = open(archive_name.c_str(), dev->mode, 0640)) < 0) {
453 dev->dev_errno = errno;
454 Mmsg2(dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name.c_str(),
456 Emsg0(M_FATAL, 0, dev->errmsg);
459 dev->state |= ST_OPENED;
461 update_pos_dev(dev); /* update position */
462 if (fstat(dev->fd, &filestat) < 0) {
464 dev->dev_errno = errno;
465 Mmsg2(dev->errmsg, _("Could not fstat: %s, ERR=%s\n"), archive_name.c_str(),
467 Emsg0(M_FATAL, 0, dev->errmsg);
469 dev->part_size = filestat.st_size;
472 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);
473 if (dev->is_dvd() && (dev->mode != OPEN_READ_ONLY) &&
474 (dev->free_space_errno == 0 || dev->num_parts == dev->part)) {
475 update_free_space_dev(dev);
481 bool _rewind_dev(char *file, int line, DEVICE *dev)
483 Dmsg2(100, "rewind_dev called from %s:%d\n", file, line);
484 return rewind_dev(dev);
490 * Returns: true on success
493 bool rewind_dev(DEVICE *dev)
498 Dmsg1(29, "rewind_dev %s\n", dev->print_name());
500 dev->dev_errno = EBADF;
501 Mmsg1(dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
503 Emsg0(M_ABORT, 0, dev->errmsg);
506 dev->state &= ~(ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
507 dev->block_num = dev->file = 0;
510 if (dev->is_tape()) {
511 mt_com.mt_op = MTREW;
513 /* If we get an I/O error on rewind, it is probably because
514 * the drive is actually busy. We loop for (about 5 minutes)
515 * retrying every 5 seconds.
517 for (i=dev->max_rewind_wait; ; i -= 5) {
518 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
520 clrerror_dev(dev, MTREW);
521 if (i == dev->max_rewind_wait) {
522 Dmsg1(200, "Rewind error, %s. retrying ...\n", be.strerror());
524 if (dev->dev_errno == EIO && i > 0) {
525 Dmsg0(200, "Sleeping 5 seconds.\n");
529 Mmsg2(dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
530 dev->print_name(), be.strerror());
535 } else if (dev->is_file()) {
536 if (lseek_dev(dev, (off_t)0, SEEK_SET) < 0) {
538 dev->dev_errno = errno;
539 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
540 dev->print_name(), be.strerror());
547 void DEVICE::block(int why)
550 block_device(this, why);
554 void DEVICE::unblock()
557 unblock_device(this);
562 * Called to indicate that we have just read an
563 * EOF from the device.
565 void DEVICE::set_eof()
575 * Called to indicate we are now at the end of the tape, and
576 * writing is not possible.
578 void DEVICE::set_eot()
580 state |= (ST_EOF|ST_EOT|ST_WEOT);
581 state &= ~ST_APPEND; /* make tape read-only */
585 * Position device to end of medium (end of data)
586 * Returns: true on succes
593 struct mtget mt_stat;
598 dev->dev_errno = EBADF;
599 Mmsg1(dev->errmsg, _("Bad call to eod_dev. Device %s not open\n"),
604 #if defined (__digital__) && defined (__unix__)
605 return fsf_dev(dev, dev->VolCatInfo.VolCatFiles);
608 Dmsg0(29, "eod_dev\n");
612 dev->state &= ~(ST_EOF); /* remove EOF flags */
613 dev->block_num = dev->file = 0;
616 if (dev->state & (ST_FIFO | ST_PROG)) {
619 if (!dev->is_tape()) {
620 pos = lseek_dev(dev, (off_t)0, SEEK_END);
621 // Dmsg1(100, "====== Seek to %lld\n", pos);
624 dev->state |= ST_EOT;
627 dev->dev_errno = errno;
629 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
630 dev->print_name(), be.strerror());
634 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
635 Dmsg0(100,"Using FAST FSF for EOM\n");
636 /* If unknown position, rewind */
637 if (!dev_get_os_pos(dev, &mt_stat)) {
638 if (!rewind_dev(dev)) {
642 mt_com.mt_op = MTFSF;
644 * ***FIXME*** fix code to handle case that INT16_MAX is
647 mt_com.mt_count = INT16_MAX; /* use big positive number */
648 if (mt_com.mt_count < 0) {
649 mt_com.mt_count = INT16_MAX; /* brain damaged system */
653 if (dev_cap(dev, CAP_MTIOCGET) && (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM))) {
654 if (dev_cap(dev, CAP_EOM)) {
655 Dmsg0(100,"Using EOM for EOM\n");
656 mt_com.mt_op = MTEOM;
660 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
662 clrerror_dev(dev, mt_com.mt_op);
663 Dmsg1(50, "ioctl error: %s\n", be.strerror());
665 Mmsg2(dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
666 dev->print_name(), be.strerror());
670 if (!dev_get_os_pos(dev, &mt_stat)) {
672 clrerror_dev(dev, -1);
673 Mmsg2(dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
674 dev->print_name(), be.strerror());
677 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
679 dev->file = mt_stat.mt_fileno;
685 * Rewind then use FSF until EOT reached
687 if (!rewind_dev(dev)) {
691 * Move file by file to the end of the tape
694 for (file_num=dev->file; !dev->at_eot(); file_num++) {
695 Dmsg0(200, "eod_dev: doing fsf 1\n");
696 if (!fsf_dev(dev, 1)) {
697 Dmsg0(200, "fsf_dev error.\n");
701 * Avoid infinite loop. ***FIXME*** possibly add code
702 * to set EOD or to turn off CAP_FASTFSF if on.
704 if (file_num == (int)dev->file) {
705 struct mtget mt_stat;
706 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
707 if (dev_get_os_pos(dev, &mt_stat)) {
708 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
710 dev->file = mt_stat.mt_fileno;
717 * Some drivers leave us after second EOF when doing
718 * MTEOM, so we must backup so that appending overwrites
721 if (dev_cap(dev, CAP_BSFATEOM)) {
722 struct mtget mt_stat;
723 /* Backup over EOF */
724 ok = bsf_dev(dev, 1);
725 /* If BSF worked and fileno is known (not -1), set file */
726 if (dev_get_os_pos(dev, &mt_stat)) {
727 Dmsg2(100, "BSFATEOF adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
728 dev->file = mt_stat.mt_fileno;
730 dev->file++; /* wing it -- not correct on all OSes */
733 update_pos_dev(dev); /* update position */
735 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
740 * Set the position of the device -- only for files
741 * For other devices, there is no generic way to do it.
742 * Returns: true on succes
745 bool update_pos_dev(DEVICE *dev)
751 dev->dev_errno = EBADF;
752 Mmsg0(dev->errmsg, _("Bad device call. Device not open\n"));
753 Emsg0(M_FATAL, 0, dev->errmsg);
757 /* Find out where we are */
758 if (dev->is_file()) {
761 pos = lseek_dev(dev, (off_t)0, SEEK_CUR);
764 dev->dev_errno = errno;
765 Pmsg1(000, "Seek error: ERR=%s\n", be.strerror());
766 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
767 dev->print_name(), be.strerror());
770 dev->file_addr = pos;
778 * Return the status of the device. This was meant
779 * to be a generic routine. Unfortunately, it doesn't
780 * seem possible (at least I do not know how to do it
781 * currently), which means that for the moment, this
782 * routine has very little value.
786 uint32_t status_dev(DEVICE *dev)
788 struct mtget mt_stat;
791 if (dev->state & (ST_EOT | ST_WEOT)) {
795 if (dev->state & ST_EOF) {
799 if (dev->is_tape()) {
801 Pmsg0(-20," Bacula status:");
802 Pmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
803 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
805 dev->dev_errno = errno;
806 Mmsg2(dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
807 dev->print_name(), be.strerror());
810 Pmsg0(-20, " Device status:");
812 #if defined(HAVE_LINUX_OS)
813 if (GMT_EOF(mt_stat.mt_gstat)) {
817 if (GMT_BOT(mt_stat.mt_gstat)) {
821 if (GMT_EOT(mt_stat.mt_gstat)) {
825 if (GMT_SM(mt_stat.mt_gstat)) {
829 if (GMT_EOD(mt_stat.mt_gstat)) {
833 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
835 Pmsg0(-20, " WR_PROT");
837 if (GMT_ONLINE(mt_stat.mt_gstat)) {
839 Pmsg0(-20, " ONLINE");
841 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
843 Pmsg0(-20, " DR_OPEN");
845 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
846 stat |= BMT_IM_REP_EN;
847 Pmsg0(-20, " IM_REP_EN");
849 #endif /* !SunOS && !OSF */
850 if (dev_cap(dev, CAP_MTIOCGET)) {
851 Pmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
853 Pmsg2(-20, " file=%d block=%d\n", -1, -1);
856 stat |= BMT_ONLINE | BMT_BOT;
863 * Load medium in device
864 * Returns: true on success
867 bool load_dev(DEVICE *dev)
874 dev->dev_errno = EBADF;
875 Mmsg0(dev->errmsg, _("Bad call to load_dev. Device not open\n"));
876 Emsg0(M_FATAL, 0, dev->errmsg);
879 if (!(dev->is_tape())) {
883 Dmsg0(200, "stored: MTLOAD command not available\n");
885 dev->dev_errno = ENOTTY; /* function not available */
886 Mmsg2(dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
887 dev->print_name(), be.strerror());
891 dev->block_num = dev->file = 0;
894 mt_com.mt_op = MTLOAD;
896 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
898 dev->dev_errno = errno;
899 Mmsg2(dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
900 dev->print_name(), be.strerror());
908 * Rewind device and put it offline
909 * Returns: true on success
912 bool offline_dev(DEVICE *dev)
917 dev->dev_errno = EBADF;
918 Mmsg0(dev->errmsg, _("Bad call to offline_dev. Device not open\n"));
919 Emsg0(M_FATAL, 0, dev->errmsg);
922 if (!(dev->is_tape())) {
926 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
927 dev->block_num = dev->file = 0;
932 mt_com.mt_op = MTUNLOCK;
934 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
936 mt_com.mt_op = MTOFFL;
938 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
940 dev->dev_errno = errno;
941 Mmsg2(dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
942 dev->print_name(), be.strerror());
945 Dmsg1(100, "Offlined device %s\n", dev->print_name());
949 bool offline_or_rewind_dev(DEVICE *dev)
954 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
955 return offline_dev(dev);
958 * Note, this rewind probably should not be here (it wasn't
959 * in prior versions of Bacula), but on FreeBSD, this is
960 * needed in the case the tape was "frozen" due to an error
961 * such as backspacing after writing and EOF. If it is not
962 * done, all future references to the drive get and I/O error.
964 clrerror_dev(dev, MTREW);
965 return rewind_dev(dev);
970 * Foward space a file
971 * Returns: true on success
975 fsf_dev(DEVICE *dev, int num)
977 struct mtget mt_stat;
982 dev->dev_errno = EBADF;
983 Mmsg0(dev->errmsg, _("Bad call to fsf_dev. Device not open\n"));
984 Emsg0(M_FATAL, 0, dev->errmsg);
988 if (!dev->is_tape()) {
991 if (dev->state & ST_EOT) {
993 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
996 if (dev->state & ST_EOF) {
997 Dmsg0(200, "ST_EOF set on entry to FSF\n");
1000 Dmsg0(100, "fsf_dev\n");
1003 * If Fast forward space file is set, then we
1004 * use MTFSF to forward space and MTIOCGET
1005 * to get the file position. We assume that
1006 * the SCSI driver will ensure that we do not
1007 * forward space past the end of the medium.
1009 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_MTIOCGET) && dev_cap(dev, CAP_FASTFSF)) {
1010 mt_com.mt_op = MTFSF;
1011 mt_com.mt_count = num;
1012 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1013 if (stat < 0 || !dev_get_os_pos(dev, &mt_stat)) {
1015 dev->state |= ST_EOT;
1016 Dmsg0(200, "Set ST_EOT\n");
1017 clrerror_dev(dev, MTFSF);
1018 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1019 dev->print_name(), be.strerror());
1020 Dmsg1(200, "%s", dev->errmsg);
1023 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
1025 dev->file = mt_stat.mt_fileno;
1029 * Here if CAP_FSF is set, and virtually all drives
1030 * these days support it, we read a record, then forward
1031 * space one file. Using this procedure, which is slow,
1032 * is the only way we can be sure that we don't read
1033 * two consecutive EOF marks, which means End of Data.
1035 } else if (dev_cap(dev, CAP_FSF)) {
1038 Dmsg0(200, "FSF has cap_fsf\n");
1039 if (dev->max_block_size == 0) {
1040 rbuf_len = DEFAULT_BLOCK_SIZE;
1042 rbuf_len = dev->max_block_size;
1044 rbuf = get_memory(rbuf_len);
1045 mt_com.mt_op = MTFSF;
1046 mt_com.mt_count = 1;
1047 while (num-- && !(dev->state & ST_EOT)) {
1048 Dmsg0(100, "Doing read before fsf\n");
1049 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
1050 if (errno == ENOMEM) { /* tape record exceeds buf len */
1051 stat = rbuf_len; /* This is OK */
1054 dev->state |= ST_EOT;
1055 clrerror_dev(dev, -1);
1056 Dmsg2(100, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
1058 Mmsg2(dev->errmsg, _("read error on %s. ERR=%s.\n"),
1059 dev->print_name(), be.strerror());
1060 Dmsg1(100, "%s", dev->errmsg);
1064 if (stat == 0) { /* EOF */
1065 update_pos_dev(dev);
1066 Dmsg1(100, "End of File mark from read. File=%d\n", dev->file+1);
1067 /* Two reads of zero means end of tape */
1068 if (dev->state & ST_EOF) {
1069 dev->state |= ST_EOT;
1070 Dmsg0(100, "Set ST_EOT\n");
1076 } else { /* Got data */
1077 dev->state &= ~(ST_EOF|ST_EOT);
1080 Dmsg0(100, "Doing MTFSF\n");
1081 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1082 if (stat < 0) { /* error => EOT */
1084 dev->state |= ST_EOT;
1085 Dmsg0(100, "Set ST_EOT\n");
1086 clrerror_dev(dev, MTFSF);
1087 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1088 dev->print_name(), be.strerror());
1089 Dmsg0(100, "Got < 0 for MTFSF\n");
1090 Dmsg1(100, "%s", dev->errmsg);
1098 * No FSF, so use FSR to simulate it
1101 Dmsg0(200, "Doing FSR for FSF\n");
1102 while (num-- && !(dev->state & ST_EOT)) {
1103 dev->fsr(INT32_MAX); /* returns -1 on EOF or EOT */
1105 if (dev->state & ST_EOT) {
1107 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
1113 update_pos_dev(dev);
1114 Dmsg1(200, "Return %d from FSF\n", stat);
1115 if (dev->state & ST_EOF)
1116 Dmsg0(200, "ST_EOF set on exit FSF\n");
1117 if (dev->state & ST_EOT)
1118 Dmsg0(200, "ST_EOT set on exit FSF\n");
1119 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
1124 * Backward space a file
1125 * Returns: false on failure
1129 bsf_dev(DEVICE *dev, int num)
1135 dev->dev_errno = EBADF;
1136 Mmsg0(dev->errmsg, _("Bad call to bsf_dev. Device not open\n"));
1137 Emsg0(M_FATAL, 0, dev->errmsg);
1141 if (!dev->is_tape()) {
1142 Mmsg1(dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
1146 Dmsg0(29, "bsf_dev\n");
1147 dev->state &= ~(ST_EOT|ST_EOF);
1151 mt_com.mt_op = MTBSF;
1152 mt_com.mt_count = num;
1153 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1156 clrerror_dev(dev, MTBSF);
1157 Mmsg2(dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
1158 dev->print_name(), be.strerror());
1160 update_pos_dev(dev);
1166 * Foward space num records
1167 * Returns: false on failure
1170 bool DEVICE::fsr(int num)
1177 Mmsg0(errmsg, _("Bad call to fsr. Device not open\n"));
1178 Emsg0(M_FATAL, 0, errmsg);
1185 if (!dev_cap(this, CAP_FSR)) {
1186 Mmsg1(errmsg, _("ioctl MTFSR not permitted on %s.\n"), print_name());
1190 Dmsg1(29, "fsr %d\n", num);
1191 mt_com.mt_op = MTFSR;
1192 mt_com.mt_count = num;
1193 stat = ioctl(fd, MTIOCTOP, (char *)&mt_com);
1199 struct mtget mt_stat;
1200 clrerror_dev(this, MTFSR);
1201 Dmsg1(100, "FSF fail: ERR=%s\n", be.strerror());
1202 if (dev_get_os_pos(this, &mt_stat)) {
1203 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", file,
1204 block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
1205 file = mt_stat.mt_fileno;
1206 block_num = mt_stat.mt_blkno;
1214 Mmsg3(errmsg, _("ioctl MTFSR %d error on %s. ERR=%s.\n"),
1215 num, print_name(), be.strerror());
1217 update_pos_dev(this);
1222 * Backward space a record
1223 * Returns: false on failure
1227 bsr_dev(DEVICE *dev, int num)
1233 dev->dev_errno = EBADF;
1234 Mmsg0(dev->errmsg, _("Bad call to bsr_dev. Device not open\n"));
1235 Emsg0(M_FATAL, 0, dev->errmsg);
1239 if (!dev->is_tape()) {
1243 if (!dev_cap(dev, CAP_BSR)) {
1244 Mmsg1(dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"), dev->print_name());
1248 Dmsg0(29, "bsr_dev\n");
1249 dev->block_num -= num;
1250 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1251 mt_com.mt_op = MTBSR;
1252 mt_com.mt_count = num;
1253 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1256 clrerror_dev(dev, MTBSR);
1257 Mmsg2(dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1258 dev->print_name(), be.strerror());
1260 update_pos_dev(dev);
1265 * Reposition the device to file, block
1266 * Returns: false on failure
1270 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1273 dev->dev_errno = EBADF;
1274 Mmsg0(dev->errmsg, _("Bad call to reposition_dev. Device not open\n"));
1275 Emsg0(M_FATAL, 0, dev->errmsg);
1279 if (!dev->is_tape()) {
1280 off_t pos = (((off_t)file)<<32) + block;
1281 Dmsg1(100, "===== lseek_dev to %d\n", (int)pos);
1282 if (lseek_dev(dev, pos, SEEK_SET) == (off_t)-1) {
1284 dev->dev_errno = errno;
1285 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
1286 dev->print_name(), be.strerror());
1290 dev->block_num = block;
1291 dev->file_addr = pos;
1294 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1295 dev->file, dev->block_num, file, block);
1296 if (file < dev->file) {
1297 Dmsg0(100, "Rewind_dev\n");
1298 if (!rewind_dev(dev)) {
1302 if (file > dev->file) {
1303 Dmsg1(100, "fsf %d\n", file-dev->file);
1304 if (!fsf_dev(dev, file-dev->file)) {
1305 Dmsg1(100, "fsf failed! ERR=%s\n", strerror_dev(dev));
1308 Dmsg2(100, "wanted_file=%d at_file=%d\n", file, dev->file);
1310 if (block < dev->block_num) {
1311 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1312 Dmsg0(100, "bsf_dev 1\n");
1314 Dmsg0(100, "fsf_dev 1\n");
1316 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1318 if (dev_cap(dev, CAP_POSITIONBLOCKS) && block > dev->block_num) {
1319 /* Ignore errors as Bacula can read to the correct block */
1320 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1321 return dev->fsr(block-dev->block_num);
1329 * Write an end of file on the device
1330 * Returns: 0 on success
1331 * non-zero on failure
1334 weof_dev(DEVICE *dev, int num)
1338 Dmsg0(29, "weof_dev\n");
1341 dev->dev_errno = EBADF;
1342 Mmsg0(dev->errmsg, _("Bad call to weof_dev. Device not open\n"));
1343 Emsg0(M_FATAL, 0, dev->errmsg);
1348 if (!dev->is_tape()) {
1351 if (!dev->can_append()) {
1352 Mmsg0(dev->errmsg, _("Attempt to WEOF on non-appendable Volume\n"));
1353 Emsg0(M_FATAL, 0, dev->errmsg);
1357 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1358 mt_com.mt_op = MTWEOF;
1359 mt_com.mt_count = num;
1360 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1367 clrerror_dev(dev, MTWEOF);
1369 Mmsg2(dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1370 dev->print_name(), be.strerror());
1377 * Return string message with last error in English
1378 * Be careful not to call this routine from within dev.c
1379 * while editing an Mmsg() or you will end up in a recursive
1380 * loop creating a Segmentation Violation.
1383 strerror_dev(DEVICE *dev)
1390 * If implemented in system, clear the tape
1394 clrerror_dev(DEVICE *dev, int func)
1396 const char *msg = NULL;
1397 struct mtget mt_stat;
1400 dev->dev_errno = errno; /* save errno */
1402 dev->VolCatInfo.VolCatErrors++;
1405 if (!dev->is_tape()) {
1408 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1411 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1415 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1420 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1425 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1429 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1433 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1437 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1458 bsnprintf(buf, sizeof(buf), "unknown func code %d", func);
1463 dev->dev_errno = ENOSYS;
1464 Mmsg1(dev->errmsg, _("I/O function \"%s\" not supported on this device.\n"), msg);
1465 Emsg0(M_ERROR, 0, dev->errmsg);
1468 /* On some systems such as NetBSD, this clears all errors */
1469 ioctl(dev->fd, MTIOCGET, (char *)&mt_stat);
1471 /* Found on Linux */
1475 mt_com.mt_op = MTIOCLRERR;
1476 mt_com.mt_count = 1;
1477 /* Clear any error condition on the tape */
1478 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1479 Dmsg0(200, "Did MTIOCLRERR\n");
1483 /* Typically on FreeBSD */
1486 /* Read and clear SCSI error status */
1487 union mterrstat mt_errstat;
1488 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1489 strerror(dev->dev_errno));
1490 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1494 /* Clear Subsystem Exception OSF1 */
1498 mt_com.mt_op = MTCSE;
1499 mt_com.mt_count = 1;
1500 /* Clear any error condition on the tape */
1501 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1502 Dmsg0(200, "Did MTCSE\n");
1508 * Flush buffer contents
1511 int flush_dev(DEVICE *dev)
1516 static void do_close(DEVICE *dev)
1519 Dmsg1(29, "really close_dev %s\n", dev->print_name());
1524 if (unmount_dev(dev, 1) < 0) {
1525 Dmsg1(0, "Cannot unmount device %s.\n", dev->print_name());
1528 /* Remove the last part file if it is empty */
1529 if (dev->can_append() && (dev->num_parts > 0)) {
1531 POOL_MEM archive_name(PM_FNAME);
1532 dev->part = dev->num_parts;
1533 get_filename(dev, dev->VolCatInfo.VolCatName, archive_name);
1534 /* Check that the part file is empty */
1535 if ((stat(archive_name.c_str(), &statp) == 0) && (statp.st_size == 0)) {
1536 unlink(archive_name.c_str());
1540 /* Clean up device packet so it can be reused */
1542 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1543 dev->label_type = B_BACULA_LABEL;
1544 dev->file = dev->block_num = 0;
1549 dev->part_start = 0;
1550 dev->EndFile = dev->EndBlock = 0;
1551 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1552 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1554 stop_thread_timer(dev->tid);
1564 void DEVICE::close()
1566 /*if (fd >= 0 && use_count == 1) {*/
1567 /* No need to check if fd >= 0: it is checked again
1568 * in do_close, and do_close MUST be called for volumes
1569 * splitted in parts, even if fd == -1. */
1570 if (use_count == 1) {
1572 } else if (use_count > 0) {
1577 ASSERT(use_count >= 0);
1582 bool truncate_dev(DEVICE *dev)
1584 Dmsg1(100, "truncate_dev %s\n", dev->print_name());
1585 if (dev->is_tape()) {
1586 return true; /* we don't really truncate tapes */
1587 /* maybe we should rewind and write and eof ???? */
1590 /* If there is more than one part, open the first one, and then truncate it. */
1591 if (dev->num_parts > 0) {
1593 dev->VolCatInfo.VolCatParts = 0;
1594 if (open_first_part(dev) < 0) {
1596 Mmsg1(dev->errmsg, "Unable to truncate device, because I'm unable to open the first part. ERR=%s\n", be.strerror());
1600 if (ftruncate(dev->fd, 0) != 0) {
1602 Mmsg1(dev->errmsg, _("Unable to truncate device. ERR=%s\n"), be.strerror());
1608 /* Return the resource name for the device */
1609 const char *DEVICE::name() const
1611 return device->hdr.name;
1615 dev_vol_name(DEVICE *dev)
1617 return dev->VolCatInfo.VolCatName;
1620 uint32_t dev_block(DEVICE *dev)
1622 update_pos_dev(dev);
1623 return dev->block_num;
1626 uint32_t dev_file(DEVICE *dev)
1628 update_pos_dev(dev);
1633 * Free memory allocated for the device
1636 term_dev(DEVICE *dev)
1639 dev->dev_errno = EBADF;
1640 Mmsg0(dev->errmsg, _("Bad call to term_dev. Device not open\n"));
1641 Emsg0(M_FATAL, 0, dev->errmsg);
1645 Dmsg0(29, "term_dev\n");
1646 if (dev->dev_name) {
1647 free_memory(dev->dev_name);
1648 dev->dev_name = NULL;
1650 if (dev->prt_name) {
1651 free_memory(dev->prt_name);
1652 dev->prt_name = NULL;
1655 free_pool_memory(dev->errmsg);
1658 pthread_mutex_destroy(&dev->mutex);
1659 pthread_cond_destroy(&dev->wait);
1660 pthread_cond_destroy(&dev->wait_next_vol);
1661 pthread_mutex_destroy(&dev->spool_mutex);
1662 rwl_destroy(&dev->lock);
1663 if (dev->attached_dcrs) {
1664 delete dev->attached_dcrs;
1665 dev->attached_dcrs = NULL;
1667 if (dev->state & ST_MALLOC) {
1668 free_pool_memory((POOLMEM *)dev);
1673 * This routine initializes the device wait timers
1675 void init_device_wait_timers(DCR *dcr)
1677 DEVICE *dev = dcr->dev;
1678 JCR *jcr = dcr->jcr;
1680 /* ******FIXME******* put these on config variables */
1681 dev->min_wait = 60 * 60;
1682 dev->max_wait = 24 * 60 * 60;
1683 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1684 dev->wait_sec = dev->min_wait;
1685 dev->rem_wait_sec = dev->wait_sec;
1688 dev->BadVolName[0] = 0;
1690 jcr->min_wait = 60 * 60;
1691 jcr->max_wait = 24 * 60 * 60;
1692 jcr->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1693 jcr->wait_sec = jcr->min_wait;
1694 jcr->rem_wait_sec = jcr->wait_sec;
1699 void init_jcr_device_wait_timers(JCR *jcr)
1701 /* ******FIXME******* put these on config variables */
1702 jcr->min_wait = 60 * 60;
1703 jcr->max_wait = 24 * 60 * 60;
1704 jcr->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1705 jcr->wait_sec = jcr->min_wait;
1706 jcr->rem_wait_sec = jcr->wait_sec;
1712 * The dev timers are used for waiting on a particular device
1714 * Returns: true if time doubled
1715 * false if max time expired
1717 bool double_dev_wait_time(DEVICE *dev)
1719 dev->wait_sec *= 2; /* double wait time */
1720 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1721 dev->wait_sec = dev->max_wait;
1724 dev->rem_wait_sec = dev->wait_sec;
1725 if (dev->num_wait >= dev->max_num_wait) {
1732 void set_os_device_parameters(DEVICE *dev)
1734 #ifdef HAVE_LINUX_OS
1736 if (dev->min_block_size == dev->max_block_size &&
1737 dev->min_block_size == 0) { /* variable block mode */
1738 mt_com.mt_op = MTSETBLK;
1739 mt_com.mt_count = 0;
1740 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1741 clrerror_dev(dev, MTSETBLK);
1743 mt_com.mt_op = MTSETDRVBUFFER;
1744 mt_com.mt_count = MT_ST_CLEARBOOLEANS;
1745 if (!dev_cap(dev, CAP_TWOEOF)) {
1746 mt_com.mt_count |= MT_ST_TWO_FM;
1748 if (dev_cap(dev, CAP_EOM)) {
1749 mt_com.mt_count |= MT_ST_FAST_MTEOM;
1751 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1752 clrerror_dev(dev, MTSETBLK);
1758 #ifdef HAVE_NETBSD_OS
1760 if (dev->min_block_size == dev->max_block_size &&
1761 dev->min_block_size == 0) { /* variable block mode */
1762 mt_com.mt_op = MTSETBSIZ;
1763 mt_com.mt_count = 0;
1764 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1765 clrerror_dev(dev, MTSETBSIZ);
1767 /* Get notified at logical end of tape */
1768 mt_com.mt_op = MTEWARN;
1769 mt_com.mt_count = 1;
1770 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1771 clrerror_dev(dev, MTEWARN);
1777 #if HAVE_FREEBSD_OS || HAVE_OPENBSD_OS
1779 if (dev->min_block_size == dev->max_block_size &&
1780 dev->min_block_size == 0) { /* variable block mode */
1781 mt_com.mt_op = MTSETBSIZ;
1782 mt_com.mt_count = 0;
1783 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1784 clrerror_dev(dev, MTSETBSIZ);
1792 if (dev->min_block_size == dev->max_block_size &&
1793 dev->min_block_size == 0) { /* variable block mode */
1794 mt_com.mt_op = MTSRSZ;
1795 mt_com.mt_count = 0;
1796 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1797 clrerror_dev(dev, MTSRSZ);
1804 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat)
1806 return dev_cap(dev, CAP_MTIOCGET) &&
1807 ioctl(dev->fd, MTIOCGET, (char *)mt_stat) == 0 &&
1808 mt_stat->mt_fileno >= 0;