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());
511 void DEVICE::block(int why)
514 block_device(this, why);
518 void DEVICE::unblock()
521 unblock_device(this);
526 * Called to indicate that we have just read an
527 * EOF from the device.
529 void DEVICE::set_eof()
539 * Called to indicate we are now at the end of the tape, and
540 * writing is not possible.
542 void DEVICE::set_eot()
544 state |= (ST_EOF|ST_EOT|ST_WEOT);
545 state &= ~ST_APPEND; /* make tape read-only */
549 * Position device to end of medium (end of data)
550 * Returns: true on succes
557 struct mtget mt_stat;
562 dev->dev_errno = EBADF;
563 Mmsg1(&dev->errmsg, _("Bad call to eod_dev. Device %s not open\n"),
567 Dmsg0(29, "eod_dev\n");
571 dev->state &= ~(ST_EOF); /* remove EOF flags */
572 dev->block_num = dev->file = 0;
575 if (dev->state & (ST_FIFO | ST_PROG)) {
578 if (!dev->is_tape()) {
579 pos = lseek_dev(dev, (off_t)0, SEEK_END);
580 // Dmsg1(100, "====== Seek to %lld\n", pos);
583 dev->state |= ST_EOT;
586 dev->dev_errno = errno;
588 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
589 dev->print_name(), be.strerror());
593 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
594 Dmsg0(100,"Using FAST FSF for EOM\n");
595 /* If unknown position, rewind */
596 if (!dev_get_os_pos(dev, &mt_stat)) {
597 if (!rewind_dev(dev)) {
601 mt_com.mt_op = MTFSF;
603 * ***FIXME*** fix code to handle case that INT16_MAX is
606 mt_com.mt_count = INT16_MAX; /* use big positive number */
607 if (mt_com.mt_count < 0) {
608 mt_com.mt_count = INT16_MAX; /* brain damaged system */
612 if (dev_cap(dev, CAP_MTIOCGET) && (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM))) {
613 if (dev_cap(dev, CAP_EOM)) {
614 Dmsg0(100,"Using EOM for EOM\n");
615 mt_com.mt_op = MTEOM;
619 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
621 clrerror_dev(dev, mt_com.mt_op);
622 Dmsg1(50, "ioctl error: %s\n", be.strerror());
624 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
625 dev->print_name(), be.strerror());
629 if (!dev_get_os_pos(dev, &mt_stat)) {
631 clrerror_dev(dev, -1);
632 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
633 dev->print_name(), be.strerror());
636 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
638 dev->file = mt_stat.mt_fileno;
644 * Rewind then use FSF until EOT reached
646 if (!rewind_dev(dev)) {
650 * Move file by file to the end of the tape
653 for (file_num=dev->file; !dev->at_eot(); file_num++) {
654 Dmsg0(200, "eod_dev: doing fsf 1\n");
655 if (!fsf_dev(dev, 1)) {
656 Dmsg0(200, "fsf_dev error.\n");
660 * Avoid infinite loop. ***FIXME*** possibly add code
661 * to set EOD or to turn off CAP_FASTFSF if on.
663 if (file_num == (int)dev->file) {
664 struct mtget mt_stat;
665 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
666 if (dev_get_os_pos(dev, &mt_stat)) {
667 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
669 dev->file = mt_stat.mt_fileno;
676 * Some drivers leave us after second EOF when doing
677 * MTEOM, so we must backup so that appending overwrites
680 if (dev_cap(dev, CAP_BSFATEOM)) {
681 struct mtget mt_stat;
682 /* Backup over EOF */
683 ok = bsf_dev(dev, 1);
684 /* If BSF worked and fileno is known (not -1), set file */
685 if (dev_get_os_pos(dev, &mt_stat)) {
686 Dmsg2(100, "BSFATEOF adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
687 dev->file = mt_stat.mt_fileno;
689 dev->file++; /* wing it -- not correct on all OSes */
692 update_pos_dev(dev); /* update position */
694 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
699 * Set the position of the device -- only for files
700 * For other devices, there is no generic way to do it.
701 * Returns: true on succes
704 bool update_pos_dev(DEVICE *dev)
710 dev->dev_errno = EBADF;
711 Mmsg0(&dev->errmsg, _("Bad device call. Device not open\n"));
712 Emsg0(M_FATAL, 0, dev->errmsg);
716 /* Find out where we are */
717 if (dev->is_file()) {
720 pos = lseek_dev(dev, (off_t)0, SEEK_CUR);
723 dev->dev_errno = errno;
724 Pmsg1(000, "Seek error: ERR=%s\n", be.strerror());
725 Mmsg2(&dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
726 dev->print_name(), be.strerror());
729 dev->file_addr = pos;
737 * Return the status of the device. This was meant
738 * to be a generic routine. Unfortunately, it doesn't
739 * seem possible (at least I do not know how to do it
740 * currently), which means that for the moment, this
741 * routine has very little value.
745 uint32_t status_dev(DEVICE *dev)
747 struct mtget mt_stat;
750 if (dev->state & (ST_EOT | ST_WEOT)) {
754 if (dev->state & ST_EOF) {
758 if (dev->is_tape()) {
760 Dmsg0(-20," Bacula status:");
761 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
762 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
764 dev->dev_errno = errno;
765 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
766 dev->print_name(), be.strerror());
769 Dmsg0(-20, " Device status:");
771 #if defined(HAVE_LINUX_OS)
772 if (GMT_EOF(mt_stat.mt_gstat)) {
776 if (GMT_BOT(mt_stat.mt_gstat)) {
780 if (GMT_EOT(mt_stat.mt_gstat)) {
784 if (GMT_SM(mt_stat.mt_gstat)) {
788 if (GMT_EOD(mt_stat.mt_gstat)) {
792 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
794 Dmsg0(-20, " WR_PROT");
796 if (GMT_ONLINE(mt_stat.mt_gstat)) {
798 Dmsg0(-20, " ONLINE");
800 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
802 Dmsg0(-20, " DR_OPEN");
804 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
805 stat |= BMT_IM_REP_EN;
806 Dmsg0(-20, " IM_REP_EN");
808 #endif /* !SunOS && !OSF */
809 if (dev_cap(dev, CAP_MTIOCGET)) {
810 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
812 Dmsg2(-20, " file=%d block=%d\n", -1, -1);
815 stat |= BMT_ONLINE | BMT_BOT;
822 * Load medium in device
823 * Returns: true on success
826 bool load_dev(DEVICE *dev)
833 dev->dev_errno = EBADF;
834 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Device not open\n"));
835 Emsg0(M_FATAL, 0, dev->errmsg);
838 if (!(dev->is_tape())) {
842 Dmsg0(200, "stored: MTLOAD command not available\n");
844 dev->dev_errno = ENOTTY; /* function not available */
845 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
846 dev->print_name(), be.strerror());
850 dev->block_num = dev->file = 0;
853 mt_com.mt_op = MTLOAD;
855 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
857 dev->dev_errno = errno;
858 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
859 dev->print_name(), be.strerror());
867 * Rewind device and put it offline
868 * Returns: true on success
871 bool offline_dev(DEVICE *dev)
876 dev->dev_errno = EBADF;
877 Mmsg0(&dev->errmsg, _("Bad call to offline_dev. Device not open\n"));
878 Emsg0(M_FATAL, 0, dev->errmsg);
881 if (!(dev->is_tape())) {
885 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
886 dev->block_num = dev->file = 0;
891 mt_com.mt_op = MTUNLOCK;
893 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
895 mt_com.mt_op = MTOFFL;
897 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
899 dev->dev_errno = errno;
900 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
901 dev->print_name(), be.strerror());
904 Dmsg1(100, "Offlined device %s\n", dev->print_name());
908 bool offline_or_rewind_dev(DEVICE *dev)
913 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
914 return offline_dev(dev);
917 * Note, this rewind probably should not be here (it wasn't
918 * in prior versions of Bacula), but on FreeBSD, this is
919 * needed in the case the tape was "frozen" due to an error
920 * such as backspacing after writing and EOF. If it is not
921 * done, all future references to the drive get and I/O error.
923 clrerror_dev(dev, MTREW);
924 return rewind_dev(dev);
929 * Foward space a file
930 * Returns: true on success
934 fsf_dev(DEVICE *dev, int num)
936 struct mtget mt_stat;
941 dev->dev_errno = EBADF;
942 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Device not open\n"));
943 Emsg0(M_FATAL, 0, dev->errmsg);
947 if (!dev->is_tape()) {
950 if (dev->state & ST_EOT) {
952 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
955 if (dev->state & ST_EOF) {
956 Dmsg0(200, "ST_EOF set on entry to FSF\n");
959 Dmsg0(100, "fsf_dev\n");
962 * If Fast forward space file is set, then we
963 * use MTFSF to forward space and MTIOCGET
964 * to get the file position. We assume that
965 * the SCSI driver will ensure that we do not
966 * forward space past the end of the medium.
968 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_MTIOCGET) && dev_cap(dev, CAP_FASTFSF)) {
969 mt_com.mt_op = MTFSF;
970 mt_com.mt_count = num;
971 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
972 if (stat < 0 || !dev_get_os_pos(dev, &mt_stat)) {
974 dev->state |= ST_EOT;
975 Dmsg0(200, "Set ST_EOT\n");
976 clrerror_dev(dev, MTFSF);
977 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
978 dev->print_name(), be.strerror());
979 Dmsg1(200, "%s", dev->errmsg);
982 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
984 dev->file = mt_stat.mt_fileno;
988 * Here if CAP_FSF is set, and virtually all drives
989 * these days support it, we read a record, then forward
990 * space one file. Using this procedure, which is slow,
991 * is the only way we can be sure that we don't read
992 * two consecutive EOF marks, which means End of Data.
994 } else if (dev_cap(dev, CAP_FSF)) {
997 Dmsg0(200, "FSF has cap_fsf\n");
998 if (dev->max_block_size == 0) {
999 rbuf_len = DEFAULT_BLOCK_SIZE;
1001 rbuf_len = dev->max_block_size;
1003 rbuf = get_memory(rbuf_len);
1004 mt_com.mt_op = MTFSF;
1005 mt_com.mt_count = 1;
1006 while (num-- && !(dev->state & ST_EOT)) {
1007 Dmsg0(100, "Doing read before fsf\n");
1008 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
1009 if (errno == ENOMEM) { /* tape record exceeds buf len */
1010 stat = rbuf_len; /* This is OK */
1013 dev->state |= ST_EOT;
1014 clrerror_dev(dev, -1);
1015 Dmsg2(100, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
1017 Mmsg2(dev->errmsg, _("read error on %s. ERR=%s.\n"),
1018 dev->print_name(), be.strerror());
1019 Dmsg1(100, "%s", dev->errmsg);
1023 if (stat == 0) { /* EOF */
1024 update_pos_dev(dev);
1025 Dmsg1(100, "End of File mark from read. File=%d\n", dev->file+1);
1026 /* Two reads of zero means end of tape */
1027 if (dev->state & ST_EOF) {
1028 dev->state |= ST_EOT;
1029 Dmsg0(100, "Set ST_EOT\n");
1035 } else { /* Got data */
1036 dev->state &= ~(ST_EOF|ST_EOT);
1039 Dmsg0(100, "Doing MTFSF\n");
1040 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1041 if (stat < 0) { /* error => EOT */
1043 dev->state |= ST_EOT;
1044 Dmsg0(100, "Set ST_EOT\n");
1045 clrerror_dev(dev, MTFSF);
1046 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1047 dev->print_name(), be.strerror());
1048 Dmsg0(100, "Got < 0 for MTFSF\n");
1049 Dmsg1(100, "%s", dev->errmsg);
1057 * No FSF, so use FSR to simulate it
1060 Dmsg0(200, "Doing FSR for FSF\n");
1061 while (num-- && !(dev->state & ST_EOT)) {
1062 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
1064 if (dev->state & ST_EOT) {
1066 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
1072 update_pos_dev(dev);
1073 Dmsg1(200, "Return %d from FSF\n", stat);
1074 if (dev->state & ST_EOF)
1075 Dmsg0(200, "ST_EOF set on exit FSF\n");
1076 if (dev->state & ST_EOT)
1077 Dmsg0(200, "ST_EOT set on exit FSF\n");
1078 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
1083 * Backward space a file
1084 * Returns: false on failure
1088 bsf_dev(DEVICE *dev, int num)
1094 dev->dev_errno = EBADF;
1095 Mmsg0(dev->errmsg, _("Bad call to bsf_dev. Device not open\n"));
1096 Emsg0(M_FATAL, 0, dev->errmsg);
1100 if (!dev->is_tape()) {
1101 Mmsg1(dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
1105 Dmsg0(29, "bsf_dev\n");
1106 dev->state &= ~(ST_EOT|ST_EOF);
1110 mt_com.mt_op = MTBSF;
1111 mt_com.mt_count = num;
1112 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1115 clrerror_dev(dev, MTBSF);
1116 Mmsg2(dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
1117 dev->print_name(), be.strerror());
1119 update_pos_dev(dev);
1125 * Foward space a record
1126 * Returns: false on failure
1130 fsr_dev(DEVICE *dev, int num)
1136 dev->dev_errno = EBADF;
1137 Mmsg0(dev->errmsg, _("Bad call to fsr_dev. Device not open\n"));
1138 Emsg0(M_FATAL, 0, dev->errmsg);
1142 if (!dev->is_tape()) {
1145 if (!dev_cap(dev, CAP_FSR)) {
1146 Mmsg1(dev->errmsg, _("ioctl MTFSR not permitted on %s.\n"), dev->print_name());
1150 Dmsg1(29, "fsr_dev %d\n", num);
1151 mt_com.mt_op = MTFSR;
1152 mt_com.mt_count = num;
1153 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1155 dev->state &= ~ST_EOF;
1156 dev->block_num += num;
1159 struct mtget mt_stat;
1160 clrerror_dev(dev, MTFSR);
1161 Dmsg1(100, "FSF fail: ERR=%s\n", be.strerror());
1162 if (dev_get_os_pos(dev, &mt_stat)) {
1163 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", dev->file,
1164 dev->block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
1165 dev->file = mt_stat.mt_fileno;
1166 dev->block_num = mt_stat.mt_blkno;
1168 if (dev->state & ST_EOF) {
1169 dev->state |= ST_EOT;
1174 Mmsg2(dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
1175 dev->print_name(), be.strerror());
1177 update_pos_dev(dev);
1182 * Backward space a record
1183 * Returns: false on failure
1187 bsr_dev(DEVICE *dev, int num)
1193 dev->dev_errno = EBADF;
1194 Mmsg0(dev->errmsg, _("Bad call to bsr_dev. Device not open\n"));
1195 Emsg0(M_FATAL, 0, dev->errmsg);
1199 if (!dev->is_tape()) {
1203 if (!dev_cap(dev, CAP_BSR)) {
1204 Mmsg1(dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"), dev->print_name());
1208 Dmsg0(29, "bsr_dev\n");
1209 dev->block_num -= num;
1210 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1211 mt_com.mt_op = MTBSR;
1212 mt_com.mt_count = num;
1213 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1216 clrerror_dev(dev, MTBSR);
1217 Mmsg2(dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1218 dev->print_name(), be.strerror());
1220 update_pos_dev(dev);
1225 * Reposition the device to file, block
1226 * Returns: false on failure
1230 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1233 dev->dev_errno = EBADF;
1234 Mmsg0(dev->errmsg, _("Bad call to reposition_dev. Device not open\n"));
1235 Emsg0(M_FATAL, 0, dev->errmsg);
1239 if (!dev->is_tape()) {
1240 off_t pos = (((off_t)file)<<32) + block;
1241 Dmsg1(100, "===== lseek_dev to %d\n", (int)pos);
1242 if (lseek_dev(dev, pos, SEEK_SET) == (off_t)-1) {
1244 dev->dev_errno = errno;
1245 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
1246 dev->print_name(), be.strerror());
1250 dev->block_num = block;
1251 dev->file_addr = pos;
1254 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1255 dev->file, dev->block_num, file, block);
1256 if (file < dev->file) {
1257 Dmsg0(100, "Rewind_dev\n");
1258 if (!rewind_dev(dev)) {
1262 if (file > dev->file) {
1263 Dmsg1(100, "fsf %d\n", file-dev->file);
1264 if (!fsf_dev(dev, file-dev->file)) {
1265 Dmsg1(100, "fsf failed! ERR=%s\n", strerror_dev(dev));
1268 Dmsg2(100, "wanted_file=%d at_file=%d\n", file, dev->file);
1270 if (block < dev->block_num) {
1271 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1272 Dmsg0(100, "bsf_dev 1\n");
1274 Dmsg0(100, "fsf_dev 1\n");
1276 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1278 if (dev_cap(dev, CAP_POSITIONBLOCKS) && block > dev->block_num) {
1279 /* Ignore errors as Bacula can read to the correct block */
1280 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1281 return fsr_dev(dev, block-dev->block_num);
1289 * Write an end of file on the device
1290 * Returns: 0 on success
1291 * non-zero on failure
1294 weof_dev(DEVICE *dev, int num)
1298 Dmsg0(29, "weof_dev\n");
1301 dev->dev_errno = EBADF;
1302 Mmsg0(dev->errmsg, _("Bad call to weof_dev. Device not open\n"));
1303 Emsg0(M_FATAL, 0, dev->errmsg);
1308 if (!dev->is_tape()) {
1311 if (!dev->can_append()) {
1312 Mmsg0(dev->errmsg, _("Attempt to WEOF on non-appendable Volume\n"));
1313 Emsg0(M_FATAL, 0, dev->errmsg);
1317 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1318 mt_com.mt_op = MTWEOF;
1319 mt_com.mt_count = num;
1320 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1327 clrerror_dev(dev, MTWEOF);
1329 Mmsg2(dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1330 dev->print_name(), be.strerror());
1337 * Return string message with last error in English
1338 * Be careful not to call this routine from within dev.c
1339 * while editing an Mmsg() or you will end up in a recursive
1340 * loop creating a Segmentation Violation.
1343 strerror_dev(DEVICE *dev)
1350 * If implemented in system, clear the tape
1354 clrerror_dev(DEVICE *dev, int func)
1356 const char *msg = NULL;
1357 struct mtget mt_stat;
1360 dev->dev_errno = errno; /* save errno */
1362 dev->VolCatInfo.VolCatErrors++;
1365 if (!dev->is_tape()) {
1368 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1371 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1375 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1380 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1385 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1389 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1393 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1397 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1418 bsnprintf(buf, sizeof(buf), "unknown func code %d", func);
1423 dev->dev_errno = ENOSYS;
1424 Mmsg1(dev->errmsg, _("I/O function \"%s\" not supported on this device.\n"), msg);
1425 Emsg0(M_ERROR, 0, dev->errmsg);
1428 /* On some systems such as NetBSD, this clears all errors */
1429 ioctl(dev->fd, MTIOCGET, (char *)&mt_stat);
1431 /* Found on Linux */
1435 mt_com.mt_op = MTIOCLRERR;
1436 mt_com.mt_count = 1;
1437 /* Clear any error condition on the tape */
1438 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1439 Dmsg0(200, "Did MTIOCLRERR\n");
1443 /* Typically on FreeBSD */
1446 /* Read and clear SCSI error status */
1447 union mterrstat mt_errstat;
1448 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1449 strerror(dev->dev_errno));
1450 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1454 /* Clear Subsystem Exception OSF1 */
1458 mt_com.mt_op = MTCSE;
1459 mt_com.mt_count = 1;
1460 /* Clear any error condition on the tape */
1461 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1462 Dmsg0(200, "Did MTCSE\n");
1468 * Flush buffer contents
1471 int flush_dev(DEVICE *dev)
1476 static void do_close(DEVICE *dev)
1479 Dmsg1(29, "really close_dev %s\n", dev->print_name());
1484 if (unmount_dev(dev, 1) < 0) {
1485 Dmsg1(0, "Cannot unmount device %s.\n", dev->print_name());
1488 /* Remove the last part file if it is empty */
1489 if (dev->can_append() && (dev->num_parts > 0)) {
1491 POOL_MEM archive_name(PM_FNAME);
1492 dev->part = dev->num_parts;
1493 get_filename(dev, dev->VolCatInfo.VolCatName, archive_name);
1494 /* Check that the part file is empty */
1495 if ((stat(archive_name.c_str(), &statp) == 0) && (statp.st_size == 0)) {
1496 unlink(archive_name.c_str());
1500 /* Clean up device packet so it can be reused */
1502 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1503 dev->label_type = B_BACULA_LABEL;
1504 dev->file = dev->block_num = 0;
1509 dev->part_start = 0;
1510 dev->EndFile = dev->EndBlock = 0;
1511 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1512 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1514 stop_thread_timer(dev->tid);
1524 close_dev(DEVICE *dev)
1527 Mmsg0(&dev->errmsg, _("Bad call to close_dev. Device not open\n"));
1528 Emsg0(M_FATAL, 0, dev->errmsg);
1531 /*if (dev->fd >= 0 && dev->use_count == 1) {*/
1532 /* No need to check if dev->fd >= 0: it is checked again
1533 * in do_close, and do_close MUST be called for volumes
1534 * splitted in parts, even if dev->fd == -1. */
1535 if (dev->use_count == 1) {
1537 } else if (dev->use_count > 0) {
1542 ASSERT(dev->use_count >= 0);
1547 * Used when unmounting the device, ignore use_count
1549 void force_close_dev(DEVICE *dev)
1552 Mmsg0(&dev->errmsg, _("Bad call to force_close_dev. Device not open\n"));
1553 Emsg0(M_FATAL, 0, dev->errmsg);
1556 Dmsg1(29, "Force close_dev %s\n", dev->print_name());
1560 ASSERT(dev->use_count >= 0);
1564 bool truncate_dev(DEVICE *dev)
1566 Dmsg1(100, "truncate_dev %s\n", dev->print_name());
1567 if (dev->is_tape()) {
1568 return true; /* we don't really truncate tapes */
1569 /* maybe we should rewind and write and eof ???? */
1572 /* If there is more than one part, open the first one, and then truncate it. */
1573 if (dev->num_parts > 0) {
1575 dev->VolCatInfo.VolCatParts = 0;
1576 if (open_first_part(dev) < 0) {
1578 Mmsg1(&dev->errmsg, "Unable to truncate device, because I'm unable to open the first part. ERR=%s\n", be.strerror());
1582 if (ftruncate(dev->fd, 0) != 0) {
1584 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), be.strerror());
1591 dev_is_tape(DEVICE *dev)
1593 return dev->is_tape() ? true : false;
1598 * return 1 if the device is read for write, and 0 otherwise
1599 * This is meant for checking at the end of a job to see
1600 * if we still have a tape (perhaps not if at end of tape
1601 * and the job is canceled).
1604 dev_can_write(DEVICE *dev)
1606 if (dev->is_open() && dev->can_append() &&
1607 dev->is_labeled() && !(dev->state & ST_WEOT)) {
1614 /* Return the resource name for the device */
1615 const char *DEVICE::name() const
1617 return device->hdr.name;
1621 dev_vol_name(DEVICE *dev)
1623 return dev->VolCatInfo.VolCatName;
1626 uint32_t dev_block(DEVICE *dev)
1628 update_pos_dev(dev);
1629 return dev->block_num;
1632 uint32_t dev_file(DEVICE *dev)
1634 update_pos_dev(dev);
1639 * Free memory allocated for the device
1642 term_dev(DEVICE *dev)
1645 dev->dev_errno = EBADF;
1646 Mmsg0(&dev->errmsg, _("Bad call to term_dev. Device not open\n"));
1647 Emsg0(M_FATAL, 0, dev->errmsg);
1651 Dmsg0(29, "term_dev\n");
1652 if (dev->dev_name) {
1653 free_memory(dev->dev_name);
1654 dev->dev_name = NULL;
1656 if (dev->prt_name) {
1657 free_memory(dev->prt_name);
1658 dev->prt_name = NULL;
1661 free_pool_memory(dev->errmsg);
1664 pthread_mutex_destroy(&dev->mutex);
1665 pthread_cond_destroy(&dev->wait);
1666 pthread_cond_destroy(&dev->wait_next_vol);
1667 pthread_mutex_destroy(&dev->spool_mutex);
1668 rwl_destroy(&dev->lock);
1669 if (dev->attached_dcrs) {
1670 delete dev->attached_dcrs;
1671 dev->attached_dcrs = NULL;
1673 if (dev->state & ST_MALLOC) {
1674 free_pool_memory((POOLMEM *)dev);
1679 * This routine initializes the device wait timers
1681 void init_device_wait_timers(DCR *dcr)
1683 DEVICE *dev = dcr->dev;
1684 JCR *jcr = dcr->jcr;
1686 /* ******FIXME******* put these on config variables */
1687 dev->min_wait = 60 * 60;
1688 dev->max_wait = 24 * 60 * 60;
1689 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1690 dev->wait_sec = dev->min_wait;
1691 dev->rem_wait_sec = dev->wait_sec;
1694 dev->BadVolName[0] = 0;
1696 jcr->min_wait = 60 * 60;
1697 jcr->max_wait = 24 * 60 * 60;
1698 jcr->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1699 jcr->wait_sec = jcr->min_wait;
1700 jcr->rem_wait_sec = jcr->wait_sec;
1706 * The dev timers are used for waiting on a particular device
1708 * Returns: true if time doubled
1709 * false if max time expired
1711 bool double_dev_wait_time(DEVICE *dev)
1713 dev->wait_sec *= 2; /* double wait time */
1714 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1715 dev->wait_sec = dev->max_wait;
1718 dev->rem_wait_sec = dev->wait_sec;
1719 if (dev->num_wait >= dev->max_num_wait) {
1726 void set_os_device_parameters(DEVICE *dev)
1728 #ifdef HAVE_LINUX_OS
1730 if (dev->min_block_size == dev->max_block_size &&
1731 dev->min_block_size == 0) { /* variable block mode */
1732 mt_com.mt_op = MTSETBLK;
1733 mt_com.mt_count = 0;
1734 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1735 clrerror_dev(dev, MTSETBLK);
1737 mt_com.mt_op = MTSETDRVBUFFER;
1738 mt_com.mt_count = MT_ST_CLEARBOOLEANS;
1739 if (!dev_cap(dev, CAP_TWOEOF)) {
1740 mt_com.mt_count |= MT_ST_TWO_FM;
1742 if (dev_cap(dev, CAP_EOM)) {
1743 mt_com.mt_count |= MT_ST_FAST_MTEOM;
1745 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1746 clrerror_dev(dev, MTSETBLK);
1752 #ifdef HAVE_NETBSD_OS
1754 if (dev->min_block_size == dev->max_block_size &&
1755 dev->min_block_size == 0) { /* variable block mode */
1756 mt_com.mt_op = MTSETBSIZ;
1757 mt_com.mt_count = 0;
1758 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1759 clrerror_dev(dev, MTSETBSIZ);
1761 /* Get notified at logical end of tape */
1762 mt_com.mt_op = MTEWARN;
1763 mt_com.mt_count = 1;
1764 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1765 clrerror_dev(dev, MTEWARN);
1771 #if HAVE_FREEBSD_OS || HAVE_OPENBSD_OS
1773 if (dev->min_block_size == dev->max_block_size &&
1774 dev->min_block_size == 0) { /* variable block mode */
1775 mt_com.mt_op = MTSETBSIZ;
1776 mt_com.mt_count = 0;
1777 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1778 clrerror_dev(dev, MTSETBSIZ);
1786 if (dev->min_block_size == dev->max_block_size &&
1787 dev->min_block_size == 0) { /* variable block mode */
1788 mt_com.mt_op = MTSRSZ;
1789 mt_com.mt_count = 0;
1790 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1791 clrerror_dev(dev, MTSRSZ);
1798 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat)
1800 return dev_cap(dev, CAP_MTIOCGET) &&
1801 ioctl(dev->fd, MTIOCGET, (char *)mt_stat) == 0 &&
1802 mt_stat->mt_fileno >= 0;