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 Dmsg3(29, "open_dev: device is %s (mode:%d)\n", dev->is_dvd()?"DVD":"disk",
431 archive_name.c_str(), mode);
432 dev->openmode = mode;
435 * If we are not trying to access the last part, set mode to
436 * OPEN_READ_ONLY as writing would be an error.
438 if (dev->part < dev->num_parts) {
439 mode = OPEN_READ_ONLY;
442 if (mode == OPEN_READ_WRITE) {
443 dev->mode = O_CREAT | O_RDWR | O_BINARY;
444 } else if (mode == OPEN_READ_ONLY) {
445 dev->mode = O_RDONLY | O_BINARY;
446 } else if (mode == OPEN_WRITE_ONLY) {
447 dev->mode = O_WRONLY | O_BINARY;
449 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
451 /* If creating file, give 0640 permissions */
452 Dmsg2(29, "open(%s, 0x%x, 0640)\n", archive_name.c_str(), dev->mode);
453 if ((dev->fd = open(archive_name.c_str(), dev->mode, 0640)) < 0) {
455 dev->dev_errno = errno;
456 Mmsg2(dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name.c_str(),
458 Emsg0(M_FATAL, 0, dev->errmsg);
461 dev->state |= ST_OPENED;
463 update_pos_dev(dev); /* update position */
464 if (fstat(dev->fd, &filestat) < 0) {
466 dev->dev_errno = errno;
467 Mmsg2(dev->errmsg, _("Could not fstat: %s, ERR=%s\n"), archive_name.c_str(),
469 Emsg0(M_FATAL, 0, dev->errmsg);
471 dev->part_size = filestat.st_size;
474 Dmsg5(29, "open_dev: %s fd=%d opened, part=%d/%d, part_size=%u\n",
475 dev->is_dvd()?"DVD":"disk", dev->fd, dev->part, dev->num_parts,
477 if (dev->is_dvd() && (dev->mode != OPEN_READ_ONLY) &&
478 (dev->free_space_errno == 0 || dev->num_parts == dev->part)) {
479 update_free_space_dev(dev);
485 bool _rewind_dev(char *file, int line, DEVICE *dev)
487 Dmsg2(100, "rewind_dev called from %s:%d\n", file, line);
488 return rewind_dev(dev);
494 * Returns: true on success
497 bool rewind_dev(DEVICE *dev)
502 Dmsg1(29, "rewind_dev %s\n", dev->print_name());
504 dev->dev_errno = EBADF;
505 Mmsg1(dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
507 Emsg0(M_ABORT, 0, dev->errmsg);
510 dev->state &= ~(ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
511 dev->block_num = dev->file = 0;
514 if (dev->is_tape()) {
515 mt_com.mt_op = MTREW;
517 /* If we get an I/O error on rewind, it is probably because
518 * the drive is actually busy. We loop for (about 5 minutes)
519 * retrying every 5 seconds.
521 for (i=dev->max_rewind_wait; ; i -= 5) {
522 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
524 clrerror_dev(dev, MTREW);
525 if (i == dev->max_rewind_wait) {
526 Dmsg1(200, "Rewind error, %s. retrying ...\n", be.strerror());
528 if (dev->dev_errno == EIO && i > 0) {
529 Dmsg0(200, "Sleeping 5 seconds.\n");
533 Mmsg2(dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
534 dev->print_name(), be.strerror());
539 } else if (dev->is_file()) {
540 if (lseek_dev(dev, (off_t)0, SEEK_SET) < 0) {
542 dev->dev_errno = errno;
543 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
544 dev->print_name(), be.strerror());
551 void DEVICE::block(int why)
554 block_device(this, why);
558 void DEVICE::unblock()
561 unblock_device(this);
566 * Called to indicate that we have just read an
567 * EOF from the device.
569 void DEVICE::set_eof()
579 * Called to indicate we are now at the end of the tape, and
580 * writing is not possible.
582 void DEVICE::set_eot()
584 state |= (ST_EOF|ST_EOT|ST_WEOT);
585 state &= ~ST_APPEND; /* make tape read-only */
589 * Position device to end of medium (end of data)
590 * Returns: true on succes
597 struct mtget mt_stat;
602 dev->dev_errno = EBADF;
603 Mmsg1(dev->errmsg, _("Bad call to eod_dev. Device %s not open\n"),
608 #if defined (__digital__) && defined (__unix__)
609 return fsf_dev(dev, dev->VolCatInfo.VolCatFiles);
612 Dmsg0(29, "eod_dev\n");
616 dev->state &= ~(ST_EOF); /* remove EOF flags */
617 dev->block_num = dev->file = 0;
620 if (dev->state & (ST_FIFO | ST_PROG)) {
623 if (!dev->is_tape()) {
624 pos = lseek_dev(dev, (off_t)0, SEEK_END);
625 // Dmsg1(100, "====== Seek to %lld\n", pos);
628 dev->state |= ST_EOT;
631 dev->dev_errno = errno;
633 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
634 dev->print_name(), be.strerror());
638 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
639 Dmsg0(100,"Using FAST FSF for EOM\n");
640 /* If unknown position, rewind */
641 if (!dev_get_os_pos(dev, &mt_stat)) {
642 if (!rewind_dev(dev)) {
646 mt_com.mt_op = MTFSF;
648 * ***FIXME*** fix code to handle case that INT16_MAX is
651 mt_com.mt_count = INT16_MAX; /* use big positive number */
652 if (mt_com.mt_count < 0) {
653 mt_com.mt_count = INT16_MAX; /* brain damaged system */
657 if (dev_cap(dev, CAP_MTIOCGET) && (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM))) {
658 if (dev_cap(dev, CAP_EOM)) {
659 Dmsg0(100,"Using EOM for EOM\n");
660 mt_com.mt_op = MTEOM;
664 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
666 clrerror_dev(dev, mt_com.mt_op);
667 Dmsg1(50, "ioctl error: %s\n", be.strerror());
669 Mmsg2(dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
670 dev->print_name(), be.strerror());
674 if (!dev_get_os_pos(dev, &mt_stat)) {
676 clrerror_dev(dev, -1);
677 Mmsg2(dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
678 dev->print_name(), be.strerror());
681 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
683 dev->file = mt_stat.mt_fileno;
689 * Rewind then use FSF until EOT reached
691 if (!rewind_dev(dev)) {
695 * Move file by file to the end of the tape
698 for (file_num=dev->file; !dev->at_eot(); file_num++) {
699 Dmsg0(200, "eod_dev: doing fsf 1\n");
700 if (!fsf_dev(dev, 1)) {
701 Dmsg0(200, "fsf_dev error.\n");
705 * Avoid infinite loop. ***FIXME*** possibly add code
706 * to set EOD or to turn off CAP_FASTFSF if on.
708 if (file_num == (int)dev->file) {
709 struct mtget mt_stat;
710 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
711 if (dev_get_os_pos(dev, &mt_stat)) {
712 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
714 dev->file = mt_stat.mt_fileno;
721 * Some drivers leave us after second EOF when doing
722 * MTEOM, so we must backup so that appending overwrites
725 if (dev_cap(dev, CAP_BSFATEOM)) {
726 struct mtget mt_stat;
727 /* Backup over EOF */
728 ok = bsf_dev(dev, 1);
729 /* If BSF worked and fileno is known (not -1), set file */
730 if (dev_get_os_pos(dev, &mt_stat)) {
731 Dmsg2(100, "BSFATEOF adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
732 dev->file = mt_stat.mt_fileno;
734 dev->file++; /* wing it -- not correct on all OSes */
737 update_pos_dev(dev); /* update position */
739 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
744 * Set the position of the device -- only for files
745 * For other devices, there is no generic way to do it.
746 * Returns: true on succes
749 bool update_pos_dev(DEVICE *dev)
755 dev->dev_errno = EBADF;
756 Mmsg0(dev->errmsg, _("Bad device call. Device not open\n"));
757 Emsg0(M_FATAL, 0, dev->errmsg);
761 /* Find out where we are */
762 if (dev->is_file()) {
765 pos = lseek_dev(dev, (off_t)0, SEEK_CUR);
768 dev->dev_errno = errno;
769 Pmsg1(000, "Seek error: ERR=%s\n", be.strerror());
770 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
771 dev->print_name(), be.strerror());
774 dev->file_addr = pos;
782 * Return the status of the device. This was meant
783 * to be a generic routine. Unfortunately, it doesn't
784 * seem possible (at least I do not know how to do it
785 * currently), which means that for the moment, this
786 * routine has very little value.
790 uint32_t status_dev(DEVICE *dev)
792 struct mtget mt_stat;
795 if (dev->state & (ST_EOT | ST_WEOT)) {
799 if (dev->state & ST_EOF) {
803 if (dev->is_tape()) {
805 Pmsg0(-20," Bacula status:");
806 Pmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
807 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
809 dev->dev_errno = errno;
810 Mmsg2(dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
811 dev->print_name(), be.strerror());
814 Pmsg0(-20, " Device status:");
816 #if defined(HAVE_LINUX_OS)
817 if (GMT_EOF(mt_stat.mt_gstat)) {
821 if (GMT_BOT(mt_stat.mt_gstat)) {
825 if (GMT_EOT(mt_stat.mt_gstat)) {
829 if (GMT_SM(mt_stat.mt_gstat)) {
833 if (GMT_EOD(mt_stat.mt_gstat)) {
837 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
839 Pmsg0(-20, " WR_PROT");
841 if (GMT_ONLINE(mt_stat.mt_gstat)) {
843 Pmsg0(-20, " ONLINE");
845 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
847 Pmsg0(-20, " DR_OPEN");
849 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
850 stat |= BMT_IM_REP_EN;
851 Pmsg0(-20, " IM_REP_EN");
853 #endif /* !SunOS && !OSF */
854 if (dev_cap(dev, CAP_MTIOCGET)) {
855 Pmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
857 Pmsg2(-20, " file=%d block=%d\n", -1, -1);
860 stat |= BMT_ONLINE | BMT_BOT;
867 * Load medium in device
868 * Returns: true on success
871 bool load_dev(DEVICE *dev)
878 dev->dev_errno = EBADF;
879 Mmsg0(dev->errmsg, _("Bad call to load_dev. Device not open\n"));
880 Emsg0(M_FATAL, 0, dev->errmsg);
883 if (!(dev->is_tape())) {
887 Dmsg0(200, "stored: MTLOAD command not available\n");
889 dev->dev_errno = ENOTTY; /* function not available */
890 Mmsg2(dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
891 dev->print_name(), be.strerror());
895 dev->block_num = dev->file = 0;
898 mt_com.mt_op = MTLOAD;
900 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
902 dev->dev_errno = errno;
903 Mmsg2(dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
904 dev->print_name(), be.strerror());
912 * Rewind device and put it offline
913 * Returns: true on success
916 bool offline_dev(DEVICE *dev)
921 dev->dev_errno = EBADF;
922 Mmsg0(dev->errmsg, _("Bad call to offline_dev. Device not open\n"));
923 Emsg0(M_FATAL, 0, dev->errmsg);
926 if (!(dev->is_tape())) {
930 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
931 dev->block_num = dev->file = 0;
936 mt_com.mt_op = MTUNLOCK;
938 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
940 mt_com.mt_op = MTOFFL;
942 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
944 dev->dev_errno = errno;
945 Mmsg2(dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
946 dev->print_name(), be.strerror());
949 Dmsg1(100, "Offlined device %s\n", dev->print_name());
953 bool offline_or_rewind_dev(DEVICE *dev)
958 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
959 return offline_dev(dev);
962 * Note, this rewind probably should not be here (it wasn't
963 * in prior versions of Bacula), but on FreeBSD, this is
964 * needed in the case the tape was "frozen" due to an error
965 * such as backspacing after writing and EOF. If it is not
966 * done, all future references to the drive get and I/O error.
968 clrerror_dev(dev, MTREW);
969 return rewind_dev(dev);
974 * Foward space a file
975 * Returns: true on success
979 fsf_dev(DEVICE *dev, int num)
981 struct mtget mt_stat;
986 dev->dev_errno = EBADF;
987 Mmsg0(dev->errmsg, _("Bad call to fsf_dev. Device not open\n"));
988 Emsg0(M_FATAL, 0, dev->errmsg);
992 if (!dev->is_tape()) {
995 if (dev->state & ST_EOT) {
997 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
1000 if (dev->state & ST_EOF) {
1001 Dmsg0(200, "ST_EOF set on entry to FSF\n");
1004 Dmsg0(100, "fsf_dev\n");
1007 * If Fast forward space file is set, then we
1008 * use MTFSF to forward space and MTIOCGET
1009 * to get the file position. We assume that
1010 * the SCSI driver will ensure that we do not
1011 * forward space past the end of the medium.
1013 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_MTIOCGET) && dev_cap(dev, CAP_FASTFSF)) {
1014 mt_com.mt_op = MTFSF;
1015 mt_com.mt_count = num;
1016 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1017 if (stat < 0 || !dev_get_os_pos(dev, &mt_stat)) {
1019 dev->state |= ST_EOT;
1020 Dmsg0(200, "Set ST_EOT\n");
1021 clrerror_dev(dev, MTFSF);
1022 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1023 dev->print_name(), be.strerror());
1024 Dmsg1(200, "%s", dev->errmsg);
1027 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
1029 dev->file = mt_stat.mt_fileno;
1033 * Here if CAP_FSF is set, and virtually all drives
1034 * these days support it, we read a record, then forward
1035 * space one file. Using this procedure, which is slow,
1036 * is the only way we can be sure that we don't read
1037 * two consecutive EOF marks, which means End of Data.
1039 } else if (dev_cap(dev, CAP_FSF)) {
1042 Dmsg0(200, "FSF has cap_fsf\n");
1043 if (dev->max_block_size == 0) {
1044 rbuf_len = DEFAULT_BLOCK_SIZE;
1046 rbuf_len = dev->max_block_size;
1048 rbuf = get_memory(rbuf_len);
1049 mt_com.mt_op = MTFSF;
1050 mt_com.mt_count = 1;
1051 while (num-- && !(dev->state & ST_EOT)) {
1052 Dmsg0(100, "Doing read before fsf\n");
1053 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
1054 if (errno == ENOMEM) { /* tape record exceeds buf len */
1055 stat = rbuf_len; /* This is OK */
1058 dev->state |= ST_EOT;
1059 clrerror_dev(dev, -1);
1060 Dmsg2(100, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
1062 Mmsg2(dev->errmsg, _("read error on %s. ERR=%s.\n"),
1063 dev->print_name(), be.strerror());
1064 Dmsg1(100, "%s", dev->errmsg);
1068 if (stat == 0) { /* EOF */
1069 update_pos_dev(dev);
1070 Dmsg1(100, "End of File mark from read. File=%d\n", dev->file+1);
1071 /* Two reads of zero means end of tape */
1072 if (dev->state & ST_EOF) {
1073 dev->state |= ST_EOT;
1074 Dmsg0(100, "Set ST_EOT\n");
1080 } else { /* Got data */
1081 dev->state &= ~(ST_EOF|ST_EOT);
1084 Dmsg0(100, "Doing MTFSF\n");
1085 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1086 if (stat < 0) { /* error => EOT */
1088 dev->state |= ST_EOT;
1089 Dmsg0(100, "Set ST_EOT\n");
1090 clrerror_dev(dev, MTFSF);
1091 Mmsg2(dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
1092 dev->print_name(), be.strerror());
1093 Dmsg0(100, "Got < 0 for MTFSF\n");
1094 Dmsg1(100, "%s", dev->errmsg);
1102 * No FSF, so use FSR to simulate it
1105 Dmsg0(200, "Doing FSR for FSF\n");
1106 while (num-- && !(dev->state & ST_EOT)) {
1107 dev->fsr(INT32_MAX); /* returns -1 on EOF or EOT */
1109 if (dev->state & ST_EOT) {
1111 Mmsg1(dev->errmsg, _("Device %s at End of Tape.\n"), dev->print_name());
1117 update_pos_dev(dev);
1118 Dmsg1(200, "Return %d from FSF\n", stat);
1119 if (dev->state & ST_EOF)
1120 Dmsg0(200, "ST_EOF set on exit FSF\n");
1121 if (dev->state & ST_EOT)
1122 Dmsg0(200, "ST_EOT set on exit FSF\n");
1123 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
1128 * Backward space a file
1129 * Returns: false on failure
1133 bsf_dev(DEVICE *dev, int num)
1139 dev->dev_errno = EBADF;
1140 Mmsg0(dev->errmsg, _("Bad call to bsf_dev. Device not open\n"));
1141 Emsg0(M_FATAL, 0, dev->errmsg);
1145 if (!dev->is_tape()) {
1146 Mmsg1(dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
1150 Dmsg0(29, "bsf_dev\n");
1151 dev->state &= ~(ST_EOT|ST_EOF);
1155 mt_com.mt_op = MTBSF;
1156 mt_com.mt_count = num;
1157 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1160 clrerror_dev(dev, MTBSF);
1161 Mmsg2(dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
1162 dev->print_name(), be.strerror());
1164 update_pos_dev(dev);
1170 * Foward space num records
1171 * Returns: false on failure
1174 bool DEVICE::fsr(int num)
1181 Mmsg0(errmsg, _("Bad call to fsr. Device not open\n"));
1182 Emsg0(M_FATAL, 0, errmsg);
1189 if (!dev_cap(this, CAP_FSR)) {
1190 Mmsg1(errmsg, _("ioctl MTFSR not permitted on %s.\n"), print_name());
1194 Dmsg1(29, "fsr %d\n", num);
1195 mt_com.mt_op = MTFSR;
1196 mt_com.mt_count = num;
1197 stat = ioctl(fd, MTIOCTOP, (char *)&mt_com);
1203 struct mtget mt_stat;
1204 clrerror_dev(this, MTFSR);
1205 Dmsg1(100, "FSF fail: ERR=%s\n", be.strerror());
1206 if (dev_get_os_pos(this, &mt_stat)) {
1207 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", file,
1208 block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
1209 file = mt_stat.mt_fileno;
1210 block_num = mt_stat.mt_blkno;
1218 Mmsg3(errmsg, _("ioctl MTFSR %d error on %s. ERR=%s.\n"),
1219 num, print_name(), be.strerror());
1221 update_pos_dev(this);
1226 * Backward space a record
1227 * Returns: false on failure
1231 bsr_dev(DEVICE *dev, int num)
1237 dev->dev_errno = EBADF;
1238 Mmsg0(dev->errmsg, _("Bad call to bsr_dev. Device not open\n"));
1239 Emsg0(M_FATAL, 0, dev->errmsg);
1243 if (!dev->is_tape()) {
1247 if (!dev_cap(dev, CAP_BSR)) {
1248 Mmsg1(dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"), dev->print_name());
1252 Dmsg0(29, "bsr_dev\n");
1253 dev->block_num -= num;
1254 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1255 mt_com.mt_op = MTBSR;
1256 mt_com.mt_count = num;
1257 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1260 clrerror_dev(dev, MTBSR);
1261 Mmsg2(dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1262 dev->print_name(), be.strerror());
1264 update_pos_dev(dev);
1269 * Reposition the device to file, block
1270 * Returns: false on failure
1274 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1277 dev->dev_errno = EBADF;
1278 Mmsg0(dev->errmsg, _("Bad call to reposition_dev. Device not open\n"));
1279 Emsg0(M_FATAL, 0, dev->errmsg);
1283 if (!dev->is_tape()) {
1284 off_t pos = (((off_t)file)<<32) + block;
1285 Dmsg1(100, "===== lseek_dev to %d\n", (int)pos);
1286 if (lseek_dev(dev, pos, SEEK_SET) == (off_t)-1) {
1288 dev->dev_errno = errno;
1289 Mmsg2(dev->errmsg, _("lseek_dev error on %s. ERR=%s.\n"),
1290 dev->print_name(), be.strerror());
1294 dev->block_num = block;
1295 dev->file_addr = pos;
1298 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1299 dev->file, dev->block_num, file, block);
1300 if (file < dev->file) {
1301 Dmsg0(100, "Rewind_dev\n");
1302 if (!rewind_dev(dev)) {
1306 if (file > dev->file) {
1307 Dmsg1(100, "fsf %d\n", file-dev->file);
1308 if (!fsf_dev(dev, file-dev->file)) {
1309 Dmsg1(100, "fsf failed! ERR=%s\n", strerror_dev(dev));
1312 Dmsg2(100, "wanted_file=%d at_file=%d\n", file, dev->file);
1314 if (block < dev->block_num) {
1315 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1316 Dmsg0(100, "bsf_dev 1\n");
1318 Dmsg0(100, "fsf_dev 1\n");
1320 Dmsg2(100, "wanted_blk=%d at_blk=%d\n", block, dev->block_num);
1322 if (dev_cap(dev, CAP_POSITIONBLOCKS) && block > dev->block_num) {
1323 /* Ignore errors as Bacula can read to the correct block */
1324 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1325 return dev->fsr(block-dev->block_num);
1333 * Write an end of file on the device
1334 * Returns: 0 on success
1335 * non-zero on failure
1338 weof_dev(DEVICE *dev, int num)
1342 Dmsg0(29, "weof_dev\n");
1345 dev->dev_errno = EBADF;
1346 Mmsg0(dev->errmsg, _("Bad call to weof_dev. Device not open\n"));
1347 Emsg0(M_FATAL, 0, dev->errmsg);
1352 if (!dev->is_tape()) {
1355 if (!dev->can_append()) {
1356 Mmsg0(dev->errmsg, _("Attempt to WEOF on non-appendable Volume\n"));
1357 Emsg0(M_FATAL, 0, dev->errmsg);
1361 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1362 mt_com.mt_op = MTWEOF;
1363 mt_com.mt_count = num;
1364 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1371 clrerror_dev(dev, MTWEOF);
1373 Mmsg2(dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1374 dev->print_name(), be.strerror());
1381 * Return string message with last error in English
1382 * Be careful not to call this routine from within dev.c
1383 * while editing an Mmsg() or you will end up in a recursive
1384 * loop creating a Segmentation Violation.
1387 strerror_dev(DEVICE *dev)
1394 * If implemented in system, clear the tape
1398 clrerror_dev(DEVICE *dev, int func)
1400 const char *msg = NULL;
1401 struct mtget mt_stat;
1404 dev->dev_errno = errno; /* save errno */
1406 dev->VolCatInfo.VolCatErrors++;
1409 if (!dev->is_tape()) {
1412 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1415 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1419 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1424 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1429 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1433 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1437 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1441 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1462 bsnprintf(buf, sizeof(buf), "unknown func code %d", func);
1467 dev->dev_errno = ENOSYS;
1468 Mmsg1(dev->errmsg, _("I/O function \"%s\" not supported on this device.\n"), msg);
1469 Emsg0(M_ERROR, 0, dev->errmsg);
1472 /* On some systems such as NetBSD, this clears all errors */
1473 ioctl(dev->fd, MTIOCGET, (char *)&mt_stat);
1475 /* Found on Linux */
1479 mt_com.mt_op = MTIOCLRERR;
1480 mt_com.mt_count = 1;
1481 /* Clear any error condition on the tape */
1482 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1483 Dmsg0(200, "Did MTIOCLRERR\n");
1487 /* Typically on FreeBSD */
1490 /* Read and clear SCSI error status */
1491 union mterrstat mt_errstat;
1492 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1493 strerror(dev->dev_errno));
1494 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1498 /* Clear Subsystem Exception OSF1 */
1502 mt_com.mt_op = MTCSE;
1503 mt_com.mt_count = 1;
1504 /* Clear any error condition on the tape */
1505 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1506 Dmsg0(200, "Did MTCSE\n");
1512 * Flush buffer contents
1515 int flush_dev(DEVICE *dev)
1520 static void do_close(DEVICE *dev)
1523 Dmsg1(29, "really close_dev %s\n", dev->print_name());
1528 if (unmount_dev(dev, 1) < 0) {
1529 Dmsg1(0, "Cannot unmount device %s.\n", dev->print_name());
1532 /* Remove the last part file if it is empty */
1533 if (dev->can_append() && (dev->num_parts > 0)) {
1535 POOL_MEM archive_name(PM_FNAME);
1536 dev->part = dev->num_parts;
1537 get_filename(dev, dev->VolCatInfo.VolCatName, archive_name);
1538 /* Check that the part file is empty */
1539 if ((stat(archive_name.c_str(), &statp) == 0) && (statp.st_size == 0)) {
1540 unlink(archive_name.c_str());
1544 /* Clean up device packet so it can be reused */
1546 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1547 dev->label_type = B_BACULA_LABEL;
1548 dev->file = dev->block_num = 0;
1553 dev->part_start = 0;
1554 dev->EndFile = dev->EndBlock = 0;
1555 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1556 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1558 stop_thread_timer(dev->tid);
1568 void DEVICE::close()
1570 /*if (fd >= 0 && use_count == 1) {*/
1571 /* No need to check if fd >= 0: it is checked again
1572 * in do_close, and do_close MUST be called for volumes
1573 * splitted in parts, even if fd == -1. */
1574 if (use_count == 1) {
1576 } else if (use_count > 0) {
1581 ASSERT(use_count >= 0);
1586 bool truncate_dev(DEVICE *dev)
1588 Dmsg1(100, "truncate_dev %s\n", dev->print_name());
1589 if (dev->is_tape()) {
1590 return true; /* we don't really truncate tapes */
1591 /* maybe we should rewind and write and eof ???? */
1594 /* If there is more than one part, open the first one, and then truncate it. */
1595 if (dev->num_parts > 0) {
1597 dev->VolCatInfo.VolCatParts = 0;
1598 if (open_first_part(dev) < 0) {
1600 Mmsg1(dev->errmsg, "Unable to truncate device, because I'm unable to open the first part. ERR=%s\n", be.strerror());
1604 if (ftruncate(dev->fd, 0) != 0) {
1606 Mmsg1(dev->errmsg, _("Unable to truncate device. ERR=%s\n"), be.strerror());
1612 /* Return the resource name for the device */
1613 const char *DEVICE::name() const
1615 return device->hdr.name;
1619 dev_vol_name(DEVICE *dev)
1621 return dev->VolCatInfo.VolCatName;
1624 uint32_t dev_block(DEVICE *dev)
1626 update_pos_dev(dev);
1627 return dev->block_num;
1630 uint32_t dev_file(DEVICE *dev)
1632 update_pos_dev(dev);
1637 * Free memory allocated for the device
1640 term_dev(DEVICE *dev)
1643 dev->dev_errno = EBADF;
1644 Mmsg0(dev->errmsg, _("Bad call to term_dev. Device not open\n"));
1645 Emsg0(M_FATAL, 0, dev->errmsg);
1649 Dmsg0(29, "term_dev\n");
1650 if (dev->dev_name) {
1651 free_memory(dev->dev_name);
1652 dev->dev_name = NULL;
1654 if (dev->prt_name) {
1655 free_memory(dev->prt_name);
1656 dev->prt_name = NULL;
1659 free_pool_memory(dev->errmsg);
1662 pthread_mutex_destroy(&dev->mutex);
1663 pthread_cond_destroy(&dev->wait);
1664 pthread_cond_destroy(&dev->wait_next_vol);
1665 pthread_mutex_destroy(&dev->spool_mutex);
1666 rwl_destroy(&dev->lock);
1667 if (dev->attached_dcrs) {
1668 delete dev->attached_dcrs;
1669 dev->attached_dcrs = NULL;
1671 if (dev->state & ST_MALLOC) {
1672 free_pool_memory((POOLMEM *)dev);
1677 * This routine initializes the device wait timers
1679 void init_device_wait_timers(DCR *dcr)
1681 DEVICE *dev = dcr->dev;
1682 JCR *jcr = dcr->jcr;
1684 /* ******FIXME******* put these on config variables */
1685 dev->min_wait = 60 * 60;
1686 dev->max_wait = 24 * 60 * 60;
1687 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1688 dev->wait_sec = dev->min_wait;
1689 dev->rem_wait_sec = dev->wait_sec;
1692 dev->BadVolName[0] = 0;
1694 jcr->min_wait = 60 * 60;
1695 jcr->max_wait = 24 * 60 * 60;
1696 jcr->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1697 jcr->wait_sec = jcr->min_wait;
1698 jcr->rem_wait_sec = jcr->wait_sec;
1703 void init_jcr_device_wait_timers(JCR *jcr)
1705 /* ******FIXME******* put these on config variables */
1706 jcr->min_wait = 60 * 60;
1707 jcr->max_wait = 24 * 60 * 60;
1708 jcr->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1709 jcr->wait_sec = jcr->min_wait;
1710 jcr->rem_wait_sec = jcr->wait_sec;
1716 * The dev timers are used for waiting on a particular device
1718 * Returns: true if time doubled
1719 * false if max time expired
1721 bool double_dev_wait_time(DEVICE *dev)
1723 dev->wait_sec *= 2; /* double wait time */
1724 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1725 dev->wait_sec = dev->max_wait;
1728 dev->rem_wait_sec = dev->wait_sec;
1729 if (dev->num_wait >= dev->max_num_wait) {
1736 void set_os_device_parameters(DEVICE *dev)
1738 #ifdef HAVE_LINUX_OS
1740 if (dev->min_block_size == dev->max_block_size &&
1741 dev->min_block_size == 0) { /* variable block mode */
1742 mt_com.mt_op = MTSETBLK;
1743 mt_com.mt_count = 0;
1744 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1745 clrerror_dev(dev, MTSETBLK);
1747 mt_com.mt_op = MTSETDRVBUFFER;
1748 mt_com.mt_count = MT_ST_CLEARBOOLEANS;
1749 if (!dev_cap(dev, CAP_TWOEOF)) {
1750 mt_com.mt_count |= MT_ST_TWO_FM;
1752 if (dev_cap(dev, CAP_EOM)) {
1753 mt_com.mt_count |= MT_ST_FAST_MTEOM;
1755 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1756 clrerror_dev(dev, MTSETBLK);
1762 #ifdef HAVE_NETBSD_OS
1764 if (dev->min_block_size == dev->max_block_size &&
1765 dev->min_block_size == 0) { /* variable block mode */
1766 mt_com.mt_op = MTSETBSIZ;
1767 mt_com.mt_count = 0;
1768 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1769 clrerror_dev(dev, MTSETBSIZ);
1771 /* Get notified at logical end of tape */
1772 mt_com.mt_op = MTEWARN;
1773 mt_com.mt_count = 1;
1774 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1775 clrerror_dev(dev, MTEWARN);
1781 #if HAVE_FREEBSD_OS || HAVE_OPENBSD_OS
1783 if (dev->min_block_size == dev->max_block_size &&
1784 dev->min_block_size == 0) { /* variable block mode */
1785 mt_com.mt_op = MTSETBSIZ;
1786 mt_com.mt_count = 0;
1787 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1788 clrerror_dev(dev, MTSETBSIZ);
1796 if (dev->min_block_size == dev->max_block_size &&
1797 dev->min_block_size == 0) { /* variable block mode */
1798 mt_com.mt_op = MTSRSZ;
1799 mt_com.mt_count = 0;
1800 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
1801 clrerror_dev(dev, MTSRSZ);
1808 static bool dev_get_os_pos(DEVICE *dev, struct mtget *mt_stat)
1810 return dev_cap(dev, CAP_MTIOCGET) &&
1811 ioctl(dev->fd, MTIOCGET, (char *)mt_stat) == 0 &&
1812 mt_stat->mt_fileno >= 0;