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 dev_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, char *dev_name)
110 /* Check that device is available */
111 if (stat(dev_name, &statp) < 0) {
113 dev->dev_errno = errno;
115 Emsg2(M_FATAL, 0, "Unable to stat device %s : %s\n", dev_name, strerror(errno));
119 if (S_ISDIR(statp.st_mode)) {
121 } else if (S_ISCHR(statp.st_mode)) {
125 dev->dev_errno = ENODEV;
127 Emsg2(M_FATAL, 0, "%s is an unknown device type. Must be tape or directory. st_mode=%x\n",
128 dev_name, statp.st_mode);
132 dev = (DEVICE *)get_memory(sizeof(DEVICE));
133 memset(dev, 0, sizeof(DEVICE));
134 dev->state = ST_MALLOC;
136 memset(dev, 0, sizeof(DEVICE));
139 dev->state |= ST_TAPE;
141 dev->dev_name = get_memory(strlen(dev_name)+1);
142 strcpy(dev->dev_name, dev_name);
144 dev->errmsg = get_pool_memory(PM_EMSG);
147 if ((errstat=rwl_init(&dev->lock)) != 0) {
148 Mmsg1(&dev->errmsg, _("Unable to initialize dev lock. ERR=%s\n"), strerror(errstat));
149 Emsg0(M_FATAL, 0, dev->errmsg);
152 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
153 dev->dev_errno = errstat;
154 Mmsg1(&dev->errmsg, _("Unable to init mutex: ERR=%s\n"), strerror(errstat));
155 Emsg0(M_FATAL, 0, dev->errmsg);
157 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
158 dev->dev_errno = errstat;
159 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
160 Emsg0(M_FATAL, 0, dev->errmsg);
162 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
163 dev->dev_errno = errstat;
164 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
165 Emsg0(M_FATAL, 0, dev->errmsg);
168 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
172 /* Open the device with the operating system and
173 * initialize buffer pointers.
175 * Note, for a tape, the VolName is the name we give to the
176 * volume (not really used here), but for a file, the
177 * VolName represents the name of the file to be created/opened.
178 * In the case of a file, the full name is the device name
179 * (archive_name) with the VolName concatenated.
182 open_dev(DEVICE *dev, char *VolName, int mode)
184 POOLMEM *archive_name;
186 if (dev->state & ST_OPENED) {
188 * *****FIXME***** how to handle two threads wanting
189 * different volumes mounted???? E.g. one is waiting
190 * for the next volume to be mounted, and a new job
191 * starts and snatches up the device.
193 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
197 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
198 dev->dev_name, dev->use_count);
199 Emsg0(M_WARNING, 0, dev->errmsg);
203 strcpy(dev->VolCatInfo.VolCatName, VolName);
206 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
207 dev->dev_name, dev->VolCatInfo.VolCatName);
208 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
209 if (dev->state & ST_TAPE) {
211 Dmsg0(29, "open_dev: device is tape\n");
212 if (mode == READ_WRITE) {
213 dev->mode = O_RDWR | O_BINARY;
215 dev->mode = O_RDONLY | O_BINARY;
217 timeout = dev->max_open_wait;
219 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
220 if (errno == EBUSY && timeout-- > 0) {
221 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->dev_name, strerror(errno));
225 dev->dev_errno = errno;
226 Mmsg2(&dev->errmsg, _("stored: unable to open device %s: ERR=%s\n"),
227 dev->dev_name, strerror(dev->dev_errno));
228 Emsg0(M_FATAL, 0, dev->errmsg);
233 dev->state |= ST_OPENED;
235 update_pos_dev(dev); /* update position */
237 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
240 * Handle opening of file
242 archive_name = get_pool_memory(PM_FNAME);
243 strcpy(archive_name, dev->dev_name);
244 if (archive_name[strlen(archive_name)] != '/') {
245 strcat(archive_name, "/");
247 strcat(archive_name, VolName);
248 Dmsg1(29, "open_dev: device is disk %s\n", archive_name);
249 if (mode == READ_WRITE) {
250 dev->mode = O_CREAT | O_RDWR | O_BINARY;
252 dev->mode = O_RDONLY | O_BINARY;
254 if ((dev->fd = open(archive_name, dev->mode, MODE_RW)) < 0) {
255 dev->dev_errno = errno;
256 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name, strerror(dev->dev_errno));
257 Emsg0(M_FATAL, 0, dev->errmsg);
260 dev->state |= ST_OPENED;
262 update_pos_dev(dev); /* update position */
264 Dmsg1(29, "open_dev: disk fd=%d opened\n", dev->fd);
265 free_pool_memory(archive_name);
272 * Returns: 1 on success
275 int rewind_dev(DEVICE *dev)
280 Dmsg0(29, "rewind_dev\n");
282 dev->dev_errno = EBADF;
283 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
285 Emsg0(M_FATAL, 0, dev->errmsg);
288 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT | ST_EOF | ST_WEOT); /* remove EOF/EOT flags */
289 dev->block_num = dev->file = 0;
291 if (dev->state & ST_TAPE) {
292 mt_com.mt_op = MTREW;
294 /* If we get an I/O error on rewind, it is probably because
295 * the drive is actually busy. We loop for (about 5 minutes)
296 * retrying every 5 seconds.
298 for (i=dev->max_rewind_wait; ; i -= 5) {
299 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
300 if (i == dev->max_rewind_wait) {
301 Dmsg1(200, "Rewind error, %s. retrying ...\n", strerror(errno));
303 clrerror_dev(dev, MTREW);
304 if (dev->dev_errno == EIO && i > 0) {
305 Dmsg0(200, "Sleeping 5 seconds.\n");
309 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
310 dev->dev_name, strerror(dev->dev_errno));
316 if (lseek(dev->fd, 0, SEEK_SET) < 0) {
317 dev->dev_errno = errno;
318 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
319 dev->dev_name, strerror(dev->dev_errno));
327 * Position device to end of medium (end of data)
328 * Returns: 1 on succes
335 struct mtget mt_stat;
339 Dmsg0(29, "eod_dev\n");
340 if (dev->state & ST_EOT) {
343 dev->state &= ~(ST_EOF); /* remove EOF flags */
344 dev->block_num = dev->file = 0;
346 if (!(dev->state & ST_TAPE)) {
347 pos = lseek(dev->fd, 0, SEEK_END);
350 dev->state |= ST_EOT;
355 if (dev->capabilities & CAP_EOM) {
356 mt_com.mt_op = MTEOM;
358 if ((stat=ioctl(dev->fd, MTIOCTOP, (char *)&mt_com)) < 0) {
359 Dmsg1(50, "ioctl error: %s\n", strerror(dev->dev_errno));
360 clrerror_dev(dev, mt_com.mt_op);
362 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
363 dev->dev_name, strerror(dev->dev_errno));
366 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
367 dev->dev_errno = errno;
368 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
369 dev->dev_name, strerror(dev->dev_errno));
372 Dmsg2(200, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
373 dev->file = mt_stat.mt_fileno;
376 * Rewind then use FSF until EOT reached
379 if (!rewind_dev(dev)) {
382 while (!(dev->state & ST_EOT)) {
383 Dmsg0(200, "Do fsf 1\n");
384 if (fsf_dev(dev, 1) < 0) {
385 Dmsg0(200, "fsf_dev return < 0\n");
390 update_pos_dev(dev); /* update position */
391 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
396 * Set the position of the device.
397 * Returns: 1 on succes
400 int update_pos_dev(DEVICE *dev)
403 struct mtget mt_stat;
409 dev->dev_errno = EBADF;
410 Mmsg0(&dev->errmsg, _("Bad device call. Archive not open\n"));
411 Emsg0(M_FATAL, 0, dev->errmsg);
415 /* Find out where we are */
416 if (!(dev->state & ST_TAPE)) {
419 pos = lseek(dev->fd, 0, SEEK_CUR);
421 Dmsg1(200, "Seek error: ERR=%s\n", strerror(dev->dev_errno));
423 dev->dev_errno = errno;
424 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
425 dev->dev_name, strerror(dev->dev_errno));
432 #ifdef REALLY_IMPLEMENTED
433 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
434 Dmsg1(50, "MTIOCGET error: %s\n", strerror(dev->dev_errno));
435 dev->dev_errno = errno;
436 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
437 dev->dev_name, strerror(dev->dev_errno));
448 * Return the status of the device. This was meant
449 * to be a generic routine. Unfortunately, it doesn't
450 * seem possible (at least I do not know how to do it
451 * currently), which means that for the moment, this
452 * routine has very little value.
454 * Returns: 1 on success
458 status_dev(DEVICE *dev, uint32_t *status)
460 struct mtget mt_stat;
463 if (dev->state & (ST_EOT | ST_WEOT)) {
467 if (dev->state & ST_EOF) {
471 if (dev->state & ST_TAPE) {
473 Dmsg0(-20," Driver status:");
474 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
475 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
476 dev->dev_errno = errno;
477 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
478 dev->dev_name, strerror(dev->dev_errno));
481 Dmsg0(-20, " Device status:");
483 #if defined(HAVE_LINUX_OS)
484 if (GMT_EOF(mt_stat.mt_gstat)) {
488 if (GMT_BOT(mt_stat.mt_gstat)) {
492 if (GMT_EOT(mt_stat.mt_gstat)) {
496 if (GMT_SM(mt_stat.mt_gstat)) {
500 if (GMT_EOD(mt_stat.mt_gstat)) {
504 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
506 Dmsg0(-20, " WR_PROT");
508 if (GMT_ONLINE(mt_stat.mt_gstat)) {
510 Dmsg0(-20, " ONLINE");
512 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
514 Dmsg0(-20, " DR_OPEN");
516 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
517 stat |= MT_IM_REP_EN;
518 Dmsg0(-20, " IM_REP_EN");
520 #endif /* !SunOS && !OSF */
521 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
523 stat |= MT_ONLINE | MT_BOT;
531 * Load medium in device
532 * Returns: 1 on success
535 int load_dev(DEVICE *dev)
542 dev->dev_errno = EBADF;
543 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
544 Emsg0(M_FATAL, 0, dev->errmsg);
547 if (!(dev->state & ST_TAPE)) {
551 Dmsg0(200, "stored: MTLOAD command not available\n");
552 dev->dev_errno = ENOTTY; /* function not available */
553 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
554 dev->dev_name, strerror(dev->dev_errno)); return 0;
558 dev->block_num = dev->file = 0;
560 mt_com.mt_op = MTLOAD;
562 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
563 dev->dev_errno = errno;
564 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
565 dev->dev_name, strerror(dev->dev_errno)); return 0;
572 * Rewind device and put it offline
573 * Returns: 1 on success
576 int offline_dev(DEVICE *dev)
581 dev->dev_errno = EBADF;
582 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
583 Emsg0(M_FATAL, 0, dev->errmsg);
586 if (!(dev->state & ST_TAPE)) {
590 dev->block_num = dev->file = 0;
593 mt_com.mt_op = MTUNLOCK;
595 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
597 mt_com.mt_op = MTOFFL;
599 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
600 dev->dev_errno = errno;
601 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
602 dev->dev_name, strerror(dev->dev_errno));
605 Dmsg1(100, "Offlined device %s\n", dev->dev_name);
611 * Foward space a file
614 fsf_dev(DEVICE *dev, int num)
621 dev->dev_errno = EBADF;
622 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
623 Emsg0(M_FATAL, 0, dev->errmsg);
627 if (!(dev->state & ST_TAPE)) {
630 if (dev->state & ST_EOT) {
632 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
635 if (dev->state & ST_EOF)
636 Dmsg0(200, "ST_EOF set on entry to FSF\n");
637 if (dev->state & ST_EOT)
638 Dmsg0(200, "ST_EOT set on entry to FSF\n");
640 Dmsg0(29, "fsf_dev\n");
642 if (dev->capabilities & CAP_FSF) {
643 Dmsg0(200, "FSF has cap_fsf\n");
644 mt_com.mt_op = MTFSF;
646 while (num-- && !(dev->state & ST_EOT)) {
647 Dmsg0(200, "Doing read for fsf\n");
648 if ((stat = read(dev->fd, rbuf, sizeof(rbuf))) < 0) {
649 if (errno == ENOMEM) { /* tape record exceeds buf len */
650 stat = sizeof(rbuf); /* This is OK */
652 dev->state |= ST_EOT;
653 clrerror_dev(dev, -1);
654 Dmsg1(200, "Set ST_EOT read error %d\n", dev->dev_errno);
655 Mmsg2(&dev->errmsg, _("read error on %s. ERR=%s.\n"),
656 dev->dev_name, strerror(dev->dev_errno));
657 Dmsg1(200, "%s", dev->errmsg);
661 if (stat == 0) { /* EOF */
663 Dmsg1(200, "End of File mark from read. File=%d\n", dev->file+1);
664 /* Two reads of zero means end of tape */
665 if (dev->state & ST_EOF) {
666 dev->state |= ST_EOT;
667 Dmsg0(200, "Set ST_EOT\n");
670 dev->state |= ST_EOF;
675 } else { /* Got data */
676 dev->state &= ~(ST_EOF|ST_EOT);
679 Dmsg0(200, "Doing MT_FSF\n");
680 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
681 if (stat < 0) { /* error => EOT */
682 dev->state |= ST_EOT;
683 Dmsg0(200, "Set ST_EOT\n");
684 clrerror_dev(dev, MTFSF);
685 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
686 dev->dev_name, strerror(dev->dev_errno));
687 Dmsg0(200, "Got < 0 for MT_FSF\n");
688 Dmsg1(200, "%s", dev->errmsg);
690 dev->state |= ST_EOF; /* just read EOF */
697 * No FSF, so use FSR to simulate it
700 Dmsg0(200, "Doing FSR for FSF\n");
701 while (num-- && !(dev->state & ST_EOT)) {
702 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
704 if (dev->state & ST_EOT) {
706 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
713 Dmsg1(200, "Return %d from FSF\n", stat);
714 if (dev->state & ST_EOF)
715 Dmsg0(200, "ST_EOF set on exit FSF\n");
716 if (dev->state & ST_EOT)
717 Dmsg0(200, "ST_EOT set on exit FSF\n");
718 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
723 * Backward space a file
726 bsf_dev(DEVICE *dev, int num)
732 dev->dev_errno = EBADF;
733 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
734 Emsg0(M_FATAL, 0, dev->errmsg);
738 if (!(dev->state & ST_TAPE)) {
741 Dmsg0(29, "bsf_dev\n");
742 dev->state &= ~(ST_EOT|ST_EOF);
745 mt_com.mt_op = MTBSF;
746 mt_com.mt_count = num;
747 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
749 clrerror_dev(dev, MTBSF);
750 Mmsg2(&dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
751 dev->dev_name, strerror(dev->dev_errno));
759 * Foward space a record
762 fsr_dev(DEVICE *dev, int num)
768 dev->dev_errno = EBADF;
769 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
770 Emsg0(M_FATAL, 0, dev->errmsg);
774 if (!(dev->state & ST_TAPE)) {
777 Dmsg0(29, "fsr_dev\n");
778 dev->block_num += num;
779 mt_com.mt_op = MTFSR;
780 mt_com.mt_count = num;
781 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
783 dev->state &= ~ST_EOF;
785 if (dev->state & ST_EOF) {
786 dev->state |= ST_EOT;
788 dev->state |= ST_EOF; /* assume EOF */
792 clrerror_dev(dev, MTFSR);
793 Mmsg2(&dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
794 dev->dev_name, strerror(dev->dev_errno));
801 * Backward space a record
804 bsr_dev(DEVICE *dev, int num)
810 dev->dev_errno = EBADF;
811 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
812 Emsg0(M_FATAL, 0, dev->errmsg);
816 if (!(dev->state & ST_TAPE)) {
819 Dmsg0(29, "bsr_dev\n");
820 dev->block_num -= num;
821 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
822 mt_com.mt_op = MTBSR;
823 mt_com.mt_count = num;
824 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
826 clrerror_dev(dev, MTBSR);
827 Mmsg2(&dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
828 dev->dev_name, strerror(dev->dev_errno));
837 * Write an end of file on the device
840 weof_dev(DEVICE *dev, int num)
846 dev->dev_errno = EBADF;
847 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
848 Emsg0(M_FATAL, 0, dev->errmsg);
852 if (!(dev->state & ST_TAPE)) {
855 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
857 Dmsg0(29, "weof_dev\n");
858 mt_com.mt_op = MTWEOF;
859 mt_com.mt_count = num;
860 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
865 clrerror_dev(dev, MTWEOF);
866 Mmsg2(&dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
867 dev->dev_name, strerror(dev->dev_errno));
873 * Return string message with last error in English
874 * Be careful not to call this routine from within dev.c
875 * while editing an Mmsg(&) or you will end up in a recursive
876 * loop creating a Segmentation Violation.
879 strerror_dev(DEVICE *dev)
886 * If implemented in system, clear the tape
890 clrerror_dev(DEVICE *dev, int func)
894 dev->dev_errno = errno; /* save errno */
896 dev->VolCatInfo.VolCatErrors++;
899 if (!(dev->state & ST_TAPE)) {
902 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
905 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
909 dev->capabilities &= ~CAP_EOF; /* turn off feature */
913 dev->capabilities &= ~CAP_EOM; /* turn off feature */
917 dev->capabilities &= ~CAP_FSF; /* turn off feature */
921 dev->capabilities &= ~CAP_BSF; /* turn off feature */
925 dev->capabilities &= ~CAP_FSR; /* turn off feature */
929 dev->capabilities &= ~CAP_BSR; /* turn off feature */
936 dev->dev_errno = ENOSYS;
937 Mmsg1(&dev->errmsg, _("This device does not support %s.\n"), msg);
938 Emsg0(M_ERROR, 0, dev->errmsg);
945 mt_com.mt_op = MTIOCLRERR;
947 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
948 Dmsg0(200, "Did MTIOCLRERR\n");
954 * Flush buffer contents
957 int flush_dev(DEVICE *dev)
962 static void do_close(DEVICE *dev)
965 Dmsg0(29, "really close_dev\n");
967 /* Clean up device packet so it can be reused */
969 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
973 dev->LastBlockNumWritten = 0;
974 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
975 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
983 close_dev(DEVICE *dev)
986 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
987 Emsg0(M_FATAL, 0, dev->errmsg);
990 if (dev->fd >= 0 && dev->use_count == 1) {
993 Dmsg0(29, "close_dev but in use so leave open.\n");
999 * Used when unmounting the device
1001 void force_close_dev(DEVICE *dev)
1004 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1005 Emsg0(M_FATAL, 0, dev->errmsg);
1008 Dmsg0(29, "really close_dev\n");
1012 int truncate_dev(DEVICE *dev)
1014 if (dev->state & ST_TAPE) {
1017 if (ftruncate(dev->fd, 0) != 0) {
1018 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), strerror(errno));
1025 dev_is_tape(DEVICE *dev)
1027 return (dev->state & ST_TAPE) ? 1 : 0;
1031 dev_name(DEVICE *dev)
1033 return dev->dev_name;
1037 dev_vol_name(DEVICE *dev)
1039 return dev->VolCatInfo.VolCatName;
1042 uint32_t dev_block(DEVICE *dev)
1044 update_pos_dev(dev);
1045 return dev->block_num;
1048 uint32_t dev_file(DEVICE *dev)
1050 update_pos_dev(dev);
1055 * Free memory allocated for the device
1058 term_dev(DEVICE *dev)
1061 dev->dev_errno = EBADF;
1062 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1063 Emsg0(M_FATAL, 0, dev->errmsg);
1067 Dmsg0(29, "term_dev\n");
1068 if (dev->dev_name) {
1069 free_memory(dev->dev_name);
1070 dev->dev_name = NULL;
1073 free_pool_memory(dev->errmsg);
1076 rwl_destroy(&dev->lock);
1077 pthread_mutex_destroy(&dev->mutex);
1078 pthread_cond_destroy(&dev->wait);
1079 pthread_cond_destroy(&dev->wait_next_vol);
1080 if (dev->state & ST_MALLOC) {
1081 free_pool_memory((POOLMEM *)dev);
1086 /* To make following two functions more readable */
1088 #define attached_jcrs ((JCR *)(dev->attached_jcrs))
1090 void attach_jcr_to_device(DEVICE *dev, JCR *jcr)
1092 jcr->prev_dev = NULL;
1093 jcr->next_dev = attached_jcrs;
1094 if (attached_jcrs) {
1095 attached_jcrs->prev_dev = jcr;
1097 attached_jcrs = jcr;
1098 Dmsg1(100, "Attached Job %s\n", jcr->Job);
1101 void detach_jcr_from_device(DEVICE *dev, JCR *jcr)
1103 if (!jcr->prev_dev) {
1104 attached_jcrs = jcr->next_dev;
1106 jcr->prev_dev->next_dev = jcr->next_dev;
1108 if (jcr->next_dev) {
1109 jcr->next_dev->prev_dev = jcr->prev_dev;
1111 jcr->next_dev = jcr->prev_dev = NULL;
1112 Dmsg1(100, "Detached Job %s\n", jcr->Job);
1115 JCR *next_attached_jcr(DEVICE *dev, JCR *jcr)
1118 return attached_jcrs;
1120 return jcr->next_dev;