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, 2001, 2002 Kern Sibbald and John Walker
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_dev() are handled as usual. However,
61 * in write_block() instead of attempting to write the block to
62 * the physical device, it is chained into a list of blocks written
63 * after the EOT condition. In addition, all threads are blocked
64 * from writing on the tape by calling lock(), and thread other
65 * than the first thread to hit the EOT will block on a condition
66 * variable. The first thread to hit the EOT will continue to
67 * be able to read and write the tape (he sort of tunnels through
68 * the locking mechanism -- see lock() for details).
70 * Now presumably somewhere higher in the chain of command
71 * (device.c), someone will notice the EOT condition and
72 * get a new tape up, get the tape label read, and mark
73 * the label for rewriting. Then this higher level routine
74 * will write the unwritten buffer to the new volume.
75 * Finally, he will release
76 * any blocked threads by doing a broadcast on the condition
77 * variable. At that point, we should be totally back in
78 * business with no lost data.
85 /* Forward referenced functions */
86 int dev_is_tape(DEVICE *dev);
87 void clrerror_dev(DEVICE *dev, int func);
88 int fsr_dev(DEVICE *dev, int num);
90 extern int debug_level;
93 * Allocate and initialize the DEVICE structure
94 * Note, if dev is non-NULL, it is already allocated,
95 * thus we neither allocate it nor free it. This allows
96 * the caller to put the packet in shared memory.
98 * Note, for a tape, the device->device_name is the device name
99 * (e.g. /dev/nst0), and for a file, the device name
100 * is the directory in which the file will be placed.
104 init_dev(DEVICE *dev, DEVRES *device)
110 /* Check that device is available */
111 if (stat(device->device_name, &statp) < 0) {
113 dev->dev_errno = errno;
115 Emsg2(M_FATAL, 0, "Unable to stat device %s : %s\n", device->device_name,
120 if (S_ISDIR(statp.st_mode)) {
122 } else if (S_ISCHR(statp.st_mode)) {
126 dev->dev_errno = ENODEV;
128 Emsg2(M_FATAL, 0, "%s is an unknown device type. Must be tape or directory. st_mode=%x\n",
129 dev_name, statp.st_mode);
133 dev = (DEVICE *)get_memory(sizeof(DEVICE));
134 memset(dev, 0, sizeof(DEVICE));
135 dev->state = ST_MALLOC;
137 memset(dev, 0, sizeof(DEVICE));
140 dev->state |= ST_TAPE;
143 /* Copy user supplied device parameters from Resource */
144 dev->dev_name = get_memory(strlen(device->device_name)+1);
145 strcpy(dev->dev_name, device->device_name);
146 dev->capabilities = device->cap_bits;
147 dev->min_block_size = device->min_block_size;
148 dev->max_block_size = device->max_block_size;
149 dev->max_volume_jobs = device->max_volume_jobs;
150 dev->max_volume_files = device->max_volume_files;
151 dev->max_volume_size = device->max_volume_size;
152 dev->max_file_size = device->max_file_size;
153 dev->volume_capacity = device->volume_capacity;
154 dev->max_rewind_wait = device->max_rewind_wait;
155 dev->max_open_wait = device->max_open_wait;
156 dev->device = device;
159 dev->errmsg = get_pool_memory(PM_EMSG);
162 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
163 dev->dev_errno = errstat;
164 Mmsg1(&dev->errmsg, _("Unable to init mutex: ERR=%s\n"), strerror(errstat));
165 Emsg0(M_FATAL, 0, dev->errmsg);
167 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
168 dev->dev_errno = errstat;
169 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
170 Emsg0(M_FATAL, 0, dev->errmsg);
172 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
173 dev->dev_errno = errstat;
174 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
175 Emsg0(M_FATAL, 0, dev->errmsg);
178 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
182 /* Open the device with the operating system and
183 * initialize buffer pointers.
185 * Note, for a tape, the VolName is the name we give to the
186 * volume (not really used here), but for a file, the
187 * VolName represents the name of the file to be created/opened.
188 * In the case of a file, the full name is the device name
189 * (archive_name) with the VolName concatenated.
192 open_dev(DEVICE *dev, char *VolName, int mode)
194 POOLMEM *archive_name;
196 if (dev->state & ST_OPENED) {
198 * *****FIXME***** how to handle two threads wanting
199 * different volumes mounted???? E.g. one is waiting
200 * for the next volume to be mounted, and a new job
201 * starts and snatches up the device.
203 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
207 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
208 dev->dev_name, dev->use_count);
209 Emsg0(M_WARNING, 0, dev->errmsg);
213 strcpy(dev->VolCatInfo.VolCatName, VolName);
216 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
217 dev->dev_name, dev->VolCatInfo.VolCatName);
218 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
219 if (dev->state & ST_TAPE) {
221 Dmsg0(29, "open_dev: device is tape\n");
222 if (mode == READ_WRITE) {
223 dev->mode = O_RDWR | O_BINARY;
225 dev->mode = O_RDONLY | O_BINARY;
227 timeout = dev->max_open_wait;
229 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
230 if (errno == EBUSY && timeout-- > 0) {
231 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->dev_name, strerror(errno));
235 dev->dev_errno = errno;
236 Mmsg2(&dev->errmsg, _("stored: unable to open device %s: ERR=%s\n"),
237 dev->dev_name, strerror(dev->dev_errno));
238 Emsg0(M_FATAL, 0, dev->errmsg);
243 dev->state |= ST_OPENED;
245 update_pos_dev(dev); /* update position */
247 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
250 * Handle opening of file
252 archive_name = get_pool_memory(PM_FNAME);
253 strcpy(archive_name, dev->dev_name);
254 if (archive_name[strlen(archive_name)] != '/') {
255 strcat(archive_name, "/");
257 strcat(archive_name, VolName);
258 Dmsg1(29, "open_dev: device is disk %s\n", archive_name);
259 if (mode == READ_WRITE) {
260 dev->mode = O_CREAT | O_RDWR | O_BINARY;
262 dev->mode = O_RDONLY | O_BINARY;
264 if ((dev->fd = open(archive_name, dev->mode, MODE_RW)) < 0) {
265 dev->dev_errno = errno;
266 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name, strerror(dev->dev_errno));
267 Emsg0(M_FATAL, 0, dev->errmsg);
270 dev->state |= ST_OPENED;
272 update_pos_dev(dev); /* update position */
274 Dmsg1(29, "open_dev: disk fd=%d opened\n", dev->fd);
275 free_pool_memory(archive_name);
282 * Returns: 1 on success
285 int rewind_dev(DEVICE *dev)
290 Dmsg0(29, "rewind_dev\n");
292 dev->dev_errno = EBADF;
293 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
295 Emsg0(M_FATAL, 0, dev->errmsg);
298 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT | ST_EOF | ST_WEOT); /* remove EOF/EOT flags */
299 dev->block_num = dev->file = 0;
301 if (dev->state & ST_TAPE) {
302 mt_com.mt_op = MTREW;
304 /* If we get an I/O error on rewind, it is probably because
305 * the drive is actually busy. We loop for (about 5 minutes)
306 * retrying every 5 seconds.
308 for (i=dev->max_rewind_wait; ; i -= 5) {
309 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
310 if (i == dev->max_rewind_wait) {
311 Dmsg1(200, "Rewind error, %s. retrying ...\n", strerror(errno));
313 clrerror_dev(dev, MTREW);
314 if (dev->dev_errno == EIO && i > 0) {
315 Dmsg0(200, "Sleeping 5 seconds.\n");
319 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
320 dev->dev_name, strerror(dev->dev_errno));
326 if (lseek(dev->fd, (off_t)0, SEEK_SET) < 0) {
327 dev->dev_errno = errno;
328 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
329 dev->dev_name, strerror(dev->dev_errno));
337 * Position device to end of medium (end of data)
338 * Returns: 1 on succes
345 struct mtget mt_stat;
349 Dmsg0(29, "eod_dev\n");
350 if (dev->state & ST_EOT) {
353 dev->state &= ~(ST_EOF); /* remove EOF flags */
354 dev->block_num = dev->file = 0;
356 if (!(dev->state & ST_TAPE)) {
357 pos = lseek(dev->fd, (off_t)0, SEEK_END);
358 // Dmsg1(000, "====== Seek to %lld\n", pos);
361 dev->state |= ST_EOT;
366 if (dev->capabilities & CAP_EOM) {
367 mt_com.mt_op = MTEOM;
369 if ((stat=ioctl(dev->fd, MTIOCTOP, (char *)&mt_com)) < 0) {
370 Dmsg1(50, "ioctl error: %s\n", strerror(dev->dev_errno));
371 clrerror_dev(dev, mt_com.mt_op);
373 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
374 dev->dev_name, strerror(dev->dev_errno));
377 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
378 dev->dev_errno = errno;
379 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
380 dev->dev_name, strerror(dev->dev_errno));
383 Dmsg2(200, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
384 dev->file = mt_stat.mt_fileno;
387 * Rewind then use FSF until EOT reached
390 if (!rewind_dev(dev)) {
393 while (!(dev->state & ST_EOT)) {
394 Dmsg0(200, "Do fsf 1\n");
395 if (fsf_dev(dev, 1) < 0) {
396 Dmsg0(200, "fsf_dev return < 0\n");
401 update_pos_dev(dev); /* update position */
402 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
407 * Set the position of the device.
408 * Returns: 1 on succes
411 int update_pos_dev(DEVICE *dev)
414 struct mtget mt_stat;
420 dev->dev_errno = EBADF;
421 Mmsg0(&dev->errmsg, _("Bad device call. Archive not open\n"));
422 Emsg0(M_FATAL, 0, dev->errmsg);
426 /* Find out where we are */
427 if (!(dev->state & ST_TAPE)) {
430 pos = lseek(dev->fd, (off_t)0, SEEK_CUR);
432 Dmsg1(000, "Seek error: ERR=%s\n", strerror(dev->dev_errno));
433 dev->dev_errno = errno;
434 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
435 dev->dev_name, strerror(dev->dev_errno));
438 dev->file_addr = pos;
443 #ifdef REALLY_IMPLEMENTED
444 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
445 Dmsg1(50, "MTIOCGET error: %s\n", strerror(dev->dev_errno));
446 dev->dev_errno = errno;
447 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
448 dev->dev_name, strerror(dev->dev_errno));
459 * Return the status of the device. This was meant
460 * to be a generic routine. Unfortunately, it doesn't
461 * seem possible (at least I do not know how to do it
462 * currently), which means that for the moment, this
463 * routine has very little value.
465 * Returns: 1 on success
469 status_dev(DEVICE *dev, uint32_t *status)
471 struct mtget mt_stat;
474 if (dev->state & (ST_EOT | ST_WEOT)) {
478 if (dev->state & ST_EOF) {
482 if (dev->state & ST_TAPE) {
484 Dmsg0(-20," Driver status:");
485 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
486 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
487 dev->dev_errno = errno;
488 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
489 dev->dev_name, strerror(dev->dev_errno));
492 Dmsg0(-20, " Device status:");
494 #if defined(HAVE_LINUX_OS)
495 if (GMT_EOF(mt_stat.mt_gstat)) {
499 if (GMT_BOT(mt_stat.mt_gstat)) {
503 if (GMT_EOT(mt_stat.mt_gstat)) {
507 if (GMT_SM(mt_stat.mt_gstat)) {
511 if (GMT_EOD(mt_stat.mt_gstat)) {
515 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
517 Dmsg0(-20, " WR_PROT");
519 if (GMT_ONLINE(mt_stat.mt_gstat)) {
521 Dmsg0(-20, " ONLINE");
523 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
525 Dmsg0(-20, " DR_OPEN");
527 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
528 stat |= MT_IM_REP_EN;
529 Dmsg0(-20, " IM_REP_EN");
531 #endif /* !SunOS && !OSF */
532 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
534 stat |= MT_ONLINE | MT_BOT;
542 * Load medium in device
543 * Returns: 1 on success
546 int load_dev(DEVICE *dev)
553 dev->dev_errno = EBADF;
554 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
555 Emsg0(M_FATAL, 0, dev->errmsg);
558 if (!(dev->state & ST_TAPE)) {
562 Dmsg0(200, "stored: MTLOAD command not available\n");
563 dev->dev_errno = ENOTTY; /* function not available */
564 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
565 dev->dev_name, strerror(dev->dev_errno)); return 0;
569 dev->block_num = dev->file = 0;
571 mt_com.mt_op = MTLOAD;
573 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
574 dev->dev_errno = errno;
575 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
576 dev->dev_name, strerror(dev->dev_errno)); return 0;
583 * Rewind device and put it offline
584 * Returns: 1 on success
587 int offline_dev(DEVICE *dev)
592 dev->dev_errno = EBADF;
593 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
594 Emsg0(M_FATAL, 0, dev->errmsg);
597 if (!(dev->state & ST_TAPE)) {
601 dev->block_num = dev->file = 0;
604 mt_com.mt_op = MTUNLOCK;
606 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
608 mt_com.mt_op = MTOFFL;
610 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
611 dev->dev_errno = errno;
612 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
613 dev->dev_name, strerror(dev->dev_errno));
616 Dmsg1(100, "Offlined device %s\n", dev->dev_name);
622 * Foward space a file
625 fsf_dev(DEVICE *dev, int num)
632 dev->dev_errno = EBADF;
633 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
634 Emsg0(M_FATAL, 0, dev->errmsg);
638 if (!(dev->state & ST_TAPE)) {
641 if (dev->state & ST_EOT) {
643 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
646 if (dev->state & ST_EOF)
647 Dmsg0(200, "ST_EOF set on entry to FSF\n");
648 if (dev->state & ST_EOT)
649 Dmsg0(200, "ST_EOT set on entry to FSF\n");
651 Dmsg0(29, "fsf_dev\n");
653 if (dev->capabilities & CAP_FSF) {
654 Dmsg0(200, "FSF has cap_fsf\n");
655 mt_com.mt_op = MTFSF;
657 while (num-- && !(dev->state & ST_EOT)) {
658 Dmsg0(200, "Doing read for fsf\n");
659 if ((stat = read(dev->fd, rbuf, sizeof(rbuf))) < 0) {
660 if (errno == ENOMEM) { /* tape record exceeds buf len */
661 stat = sizeof(rbuf); /* This is OK */
663 dev->state |= ST_EOT;
664 clrerror_dev(dev, -1);
665 Dmsg1(200, "Set ST_EOT read error %d\n", dev->dev_errno);
666 Mmsg2(&dev->errmsg, _("read error on %s. ERR=%s.\n"),
667 dev->dev_name, strerror(dev->dev_errno));
668 Dmsg1(200, "%s", dev->errmsg);
672 if (stat == 0) { /* EOF */
674 Dmsg1(200, "End of File mark from read. File=%d\n", dev->file+1);
675 /* Two reads of zero means end of tape */
676 if (dev->state & ST_EOF) {
677 dev->state |= ST_EOT;
678 Dmsg0(200, "Set ST_EOT\n");
681 dev->state |= ST_EOF;
686 } else { /* Got data */
687 dev->state &= ~(ST_EOF|ST_EOT);
690 Dmsg0(200, "Doing MT_FSF\n");
691 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
692 if (stat < 0) { /* error => EOT */
693 dev->state |= ST_EOT;
694 Dmsg0(200, "Set ST_EOT\n");
695 clrerror_dev(dev, MTFSF);
696 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
697 dev->dev_name, strerror(dev->dev_errno));
698 Dmsg0(200, "Got < 0 for MT_FSF\n");
699 Dmsg1(200, "%s", dev->errmsg);
701 dev->state |= ST_EOF; /* just read EOF */
708 * No FSF, so use FSR to simulate it
711 Dmsg0(200, "Doing FSR for FSF\n");
712 while (num-- && !(dev->state & ST_EOT)) {
713 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
715 if (dev->state & ST_EOT) {
717 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
724 Dmsg1(200, "Return %d from FSF\n", stat);
725 if (dev->state & ST_EOF)
726 Dmsg0(200, "ST_EOF set on exit FSF\n");
727 if (dev->state & ST_EOT)
728 Dmsg0(200, "ST_EOT set on exit FSF\n");
729 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
734 * Backward space a file
737 bsf_dev(DEVICE *dev, int num)
743 dev->dev_errno = EBADF;
744 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
745 Emsg0(M_FATAL, 0, dev->errmsg);
749 if (!(dev->state & ST_TAPE)) {
752 Dmsg0(29, "bsf_dev\n");
753 dev->state &= ~(ST_EOT|ST_EOF);
756 mt_com.mt_op = MTBSF;
757 mt_com.mt_count = num;
758 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
760 clrerror_dev(dev, MTBSF);
761 Mmsg2(&dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
762 dev->dev_name, strerror(dev->dev_errno));
770 * Foward space a record
773 fsr_dev(DEVICE *dev, int num)
779 dev->dev_errno = EBADF;
780 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
781 Emsg0(M_FATAL, 0, dev->errmsg);
785 if (!(dev->state & ST_TAPE)) {
788 Dmsg0(29, "fsr_dev\n");
789 dev->block_num += num;
790 mt_com.mt_op = MTFSR;
791 mt_com.mt_count = num;
792 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
794 dev->state &= ~ST_EOF;
796 if (dev->state & ST_EOF) {
797 dev->state |= ST_EOT;
799 dev->state |= ST_EOF; /* assume EOF */
803 clrerror_dev(dev, MTFSR);
804 Mmsg2(&dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
805 dev->dev_name, strerror(dev->dev_errno));
812 * Backward space a record
815 bsr_dev(DEVICE *dev, int num)
821 dev->dev_errno = EBADF;
822 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
823 Emsg0(M_FATAL, 0, dev->errmsg);
827 if (!(dev->state & ST_TAPE)) {
830 Dmsg0(29, "bsr_dev\n");
831 dev->block_num -= num;
832 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
833 mt_com.mt_op = MTBSR;
834 mt_com.mt_count = num;
835 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
837 clrerror_dev(dev, MTBSR);
838 Mmsg2(&dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
839 dev->dev_name, strerror(dev->dev_errno));
848 * Write an end of file on the device
851 weof_dev(DEVICE *dev, int num)
857 dev->dev_errno = EBADF;
858 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
859 Emsg0(M_FATAL, 0, dev->errmsg);
863 if (!(dev->state & ST_TAPE)) {
866 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
868 Dmsg0(29, "weof_dev\n");
869 mt_com.mt_op = MTWEOF;
870 mt_com.mt_count = num;
871 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
876 clrerror_dev(dev, MTWEOF);
877 Mmsg2(&dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
878 dev->dev_name, strerror(dev->dev_errno));
884 * Return string message with last error in English
885 * Be careful not to call this routine from within dev.c
886 * while editing an Mmsg(&) or you will end up in a recursive
887 * loop creating a Segmentation Violation.
890 strerror_dev(DEVICE *dev)
897 * If implemented in system, clear the tape
901 clrerror_dev(DEVICE *dev, int func)
905 dev->dev_errno = errno; /* save errno */
907 dev->VolCatInfo.VolCatErrors++;
910 if (!(dev->state & ST_TAPE)) {
913 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
916 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
920 dev->capabilities &= ~CAP_EOF; /* turn off feature */
924 dev->capabilities &= ~CAP_EOM; /* turn off feature */
928 dev->capabilities &= ~CAP_FSF; /* turn off feature */
932 dev->capabilities &= ~CAP_BSF; /* turn off feature */
936 dev->capabilities &= ~CAP_FSR; /* turn off feature */
940 dev->capabilities &= ~CAP_BSR; /* turn off feature */
947 dev->dev_errno = ENOSYS;
948 Mmsg1(&dev->errmsg, _("This device does not support %s.\n"), msg);
949 Emsg0(M_ERROR, 0, dev->errmsg);
956 mt_com.mt_op = MTIOCLRERR;
958 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
959 Dmsg0(200, "Did MTIOCLRERR\n");
965 * Flush buffer contents
968 int flush_dev(DEVICE *dev)
973 static void do_close(DEVICE *dev)
976 Dmsg0(29, "really close_dev\n");
978 /* Clean up device packet so it can be reused */
980 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
984 dev->LastBlockNumWritten = 0;
985 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
986 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
994 close_dev(DEVICE *dev)
997 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
998 Emsg0(M_FATAL, 0, dev->errmsg);
1001 if (dev->fd >= 0 && dev->use_count == 1) {
1004 Dmsg0(29, "close_dev but in use so leave open.\n");
1010 * Used when unmounting the device
1012 void force_close_dev(DEVICE *dev)
1015 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1016 Emsg0(M_FATAL, 0, dev->errmsg);
1019 Dmsg0(29, "really close_dev\n");
1023 int truncate_dev(DEVICE *dev)
1025 if (dev->state & ST_TAPE) {
1028 if (ftruncate(dev->fd, 0) != 0) {
1029 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), strerror(errno));
1036 dev_is_tape(DEVICE *dev)
1038 return (dev->state & ST_TAPE) ? 1 : 0;
1042 dev_name(DEVICE *dev)
1044 return dev->dev_name;
1048 dev_vol_name(DEVICE *dev)
1050 return dev->VolCatInfo.VolCatName;
1053 uint32_t dev_block(DEVICE *dev)
1055 update_pos_dev(dev);
1056 return dev->block_num;
1059 uint32_t dev_file(DEVICE *dev)
1061 update_pos_dev(dev);
1066 * Free memory allocated for the device
1069 term_dev(DEVICE *dev)
1072 dev->dev_errno = EBADF;
1073 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1074 Emsg0(M_FATAL, 0, dev->errmsg);
1078 Dmsg0(29, "term_dev\n");
1079 if (dev->dev_name) {
1080 free_memory(dev->dev_name);
1081 dev->dev_name = NULL;
1084 free_pool_memory(dev->errmsg);
1088 rwl_destroy(&dev->lock);
1090 pthread_mutex_destroy(&dev->mutex);
1091 pthread_cond_destroy(&dev->wait);
1092 pthread_cond_destroy(&dev->wait_next_vol);
1093 if (dev->state & ST_MALLOC) {
1094 free_pool_memory((POOLMEM *)dev);
1099 /* To make following two functions more readable */
1101 #define attached_jcrs ((JCR *)(dev->attached_jcrs))
1103 void attach_jcr_to_device(DEVICE *dev, JCR *jcr)
1105 jcr->prev_dev = NULL;
1106 jcr->next_dev = attached_jcrs;
1107 if (attached_jcrs) {
1108 attached_jcrs->prev_dev = jcr;
1110 attached_jcrs = jcr;
1111 Dmsg1(100, "Attached Job %s\n", jcr->Job);
1114 void detach_jcr_from_device(DEVICE *dev, JCR *jcr)
1116 if (!jcr->prev_dev) {
1117 attached_jcrs = jcr->next_dev;
1119 jcr->prev_dev->next_dev = jcr->next_dev;
1121 if (jcr->next_dev) {
1122 jcr->next_dev->prev_dev = jcr->prev_dev;
1124 jcr->next_dev = jcr->prev_dev = NULL;
1125 Dmsg1(100, "Detached Job %s\n", jcr->Job);
1128 JCR *next_attached_jcr(DEVICE *dev, JCR *jcr)
1131 return attached_jcrs;
1133 return jcr->next_dev;